6697 lines
342 KiB
HTML
6697 lines
342 KiB
HTML
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padding:0cm;
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font-size:9.0pt;
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.MsoFooter, li.MsoFooter, div.MsoFooter
|
||
{mso-style-link:"ҳ<><D2B3> Char";
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
||
layout-grid-mode:char;
|
||
font-size:9.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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p.MsoIndexHeading, li.MsoIndexHeading, div.MsoIndexHeading
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ1\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ2";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.MsoCaption, li.MsoCaption, div.MsoCaption
|
||
{margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
font-size:10.5pt;
|
||
font-family:"Arial","sans-serif";}
|
||
p.MsoTof, li.MsoTof, div.MsoTof
|
||
{margin-top:0cm;
|
||
margin-right:0cm;
|
||
margin-bottom:0cm;
|
||
margin-left:42.0pt;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
text-indent:-21.0pt;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.MsoFootnoteReference
|
||
{vertical-align:super;}
|
||
p.MsoList, li.MsoList, div.MsoList
|
||
{margin-top:0cm;
|
||
margin-right:0cm;
|
||
margin-bottom:0cm;
|
||
margin-left:21.0pt;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
text-indent:-21.0pt;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.MsoList2, li.MsoList2, div.MsoList2
|
||
{margin:0cm;
|
||
margin-bottom:.0001pt;
|
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text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.MsoList4, li.MsoList4, div.MsoList4
|
||
{margin:0cm;
|
||
margin-bottom:.0001pt;
|
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text-align:center;
|
||
font-size:10.5pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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p.MsoDate, li.MsoDate, div.MsoDate
|
||
{mso-style-link:"<22><><EFBFBD><EFBFBD> Char";
|
||
margin-top:0cm;
|
||
margin-right:0cm;
|
||
margin-bottom:0cm;
|
||
margin-left:5.0pt;
|
||
margin-bottom:.0001pt;
|
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text-align:justify;
|
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text-justify:inter-ideograph;
|
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font-size:10.5pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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a:link, span.MsoHyperlink
|
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{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>";
|
||
color:blue;
|
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text-decoration:underline;}
|
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a:visited, span.MsoHyperlinkFollowed
|
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{color:purple;
|
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text-decoration:underline;}
|
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p
|
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{mso-style-name:"<22><>ͨ\(<28><>վ\)\,<2C><>ͨ \(Web\)\,<2C><>ͨ \(Web\)1\,<2C><>ͨ \(Web\)2\,<2C><>ͨ \(Web\)3";
|
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margin-right:0cm;
|
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margin-left:0cm;
|
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font-size:12.0pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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pre
|
||
{mso-style-name:"HTML Ԥ<><D4A4><EFBFBD>ʽ\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3";
|
||
mso-style-link:"HTML Ԥ<><D4A4><EFBFBD>ʽ Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD> Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>1 Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>2 Char\,HTML Ԥ<>ȸ<EFBFBD>ʽ<EFBFBD><CABD>3 Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
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font-size:12.0pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
tt
|
||
{font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.MsoCommentSubject, li.MsoCommentSubject, div.MsoCommentSubject
|
||
{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD><EFBFBD> Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
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font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
||
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
|
||
{mso-style-link:"<22><>ע<EFBFBD><D7A2><EFBFBD>ı<EFBFBD> Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
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font-size:9.0pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.1, li.1, div.1
|
||
{mso-style-name:<EFBFBD><EFBFBD>ʽ1;
|
||
margin-top:0cm;
|
||
margin-right:0cm;
|
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margin-bottom:0cm;
|
||
margin-left:21.0pt;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
text-indent:-21.0pt;
|
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font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.a, li.a, div.a
|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
mso-style-link:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
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font-size:10.0pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.Char
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Char";
|
||
mso-style-link:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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p.a0, li.a0, div.a0
|
||
{mso-style-name:ͼ˵<EFBFBD><EFBFBD>;
|
||
mso-style-link:"ͼ˵<CDBC><CBB5> Char";
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
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text-align:center;
|
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font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.Char0
|
||
{mso-style-name:"ͼ˵<CDBC><CBB5> Char";
|
||
mso-style-link:ͼ˵<EFBFBD><EFBFBD>;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
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p.0, li.0, div.0
|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>0;
|
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margin:0cm;
|
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margin-bottom:.0001pt;
|
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text-align:center;
|
||
font-size:36.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
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p.10, li.10, div.10
|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
||
text-align:center;
|
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font-size:18.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
||
p.11, li.11, div.11
|
||
{mso-style-name:<EFBFBD>DZ<EFBFBD><EFBFBD><EFBFBD>1;
|
||
margin-top:7.8pt;
|
||
margin-right:0cm;
|
||
margin-bottom:7.8pt;
|
||
margin-left:0cm;
|
||
text-align:center;
|
||
font-size:22.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
||
p.a1, li.a1, div.a1
|
||
{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.3CharChar, li.3CharChar, div.3CharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
line-height:9.0pt;
|
||
font-size:8.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.3CharCharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.post, li.post, div.post
|
||
{mso-style-name:<EFBFBD>ʼ<EFBFBD>post;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:right;
|
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line-height:11.0pt;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.3, li.3, div.3
|
||
{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:justify;
|
||
text-justify:inter-ideograph;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.3CharChar1CharCharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1 Char Char Char";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.3CharChar1CharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char1 Char Char";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.5Char, li.5Char, div.5Char
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.5CharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><35> Char";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.5CharChar0, li.5CharChar0, div.5CharChar0
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:9.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.5CharCharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char Char";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.5Char0, li.5Char0, div.5Char0
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<D0A1><35> Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:9.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.5, li.5, div.5
|
||
{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С5<EFBFBD><EFBFBD>;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
layout-grid-mode:char;
|
||
font-size:9.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.2, li.2, div.2
|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
font-size:10.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.20, li.20, div.20
|
||
{mso-style-name:ͼ˵<EFBFBD><EFBFBD>2;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.21, li.21, div.21
|
||
{mso-style-name:<EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.3CharCharCharCharChar, li.3CharCharCharCharChar, div.3CharCharCharCharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char Char";
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
line-height:9.0pt;
|
||
font-size:8.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
span.3CharCharCharCharCharChar
|
||
{mso-style-name:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char Char";
|
||
mso-style-link:"ͼ<><CDBC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3 Char Char Char Char Char";
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.a2, li.a2, div.a2
|
||
{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
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font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.110, li.110, div.110
|
||
{mso-style-name:"<22><>ʽ <20><><EFBFBD><EFBFBD> 1 + <20><><EFBFBD><EFBFBD>1";
|
||
margin-right:0cm;
|
||
margin-left:0cm;
|
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text-align:center;
|
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page-break-after:avoid;
|
||
font-size:22.0pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
|
||
font-weight:bold;}
|
||
span.1Char
|
||
{mso-style-name:"<22><><EFBFBD><EFBFBD> 1 Char";
|
||
mso-style-link:"<22><><EFBFBD><EFBFBD> 1";
|
||
font-weight:bold;}
|
||
p.22, li.22, div.22
|
||
{mso-style-name:"<22><>ʽ <20>б<EFBFBD> 2 + <20><><EFBFBD><EFBFBD>";
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
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text-align:center;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.23, li.23, div.23
|
||
{mso-style-name:<EFBFBD>б<EFBFBD>2;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
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text-align:center;
|
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font-size:10.5pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.50, li.50, div.50
|
||
{mso-style-name:ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>5<EFBFBD><EFBFBD>;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
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font-size:10.5pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.111, li.111, div.111
|
||
{mso-style-name:<EFBFBD><EFBFBD>ʽ11;
|
||
margin-top:0cm;
|
||
margin-right:0cm;
|
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margin-bottom:0cm;
|
||
margin-left:21.0pt;
|
||
margin-bottom:.0001pt;
|
||
text-align:center;
|
||
text-indent:-21.0pt;
|
||
font-size:10.5pt;
|
||
font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.12, li.12, div.12
|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1;
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
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font-size:10.0pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.13, li.13, div.13
|
||
{mso-style-name:ͼ˵<EFBFBD><EFBFBD>1;
|
||
margin:0cm;
|
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margin-bottom:.0001pt;
|
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text-align:center;
|
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font-size:10.5pt;
|
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font-family:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;}
|
||
p.01, li.01, div.01
|
||
{mso-style-name:<EFBFBD><EFBFBD><EFBFBD><EFBFBD>01;
|
||
margin:0cm;
|
||
margin-bottom:.0001pt;
|
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text-align:center;
|
||
font-size:36.0pt;
|
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|
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|
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|
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|
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|
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|
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|
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|
||
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|
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span.msoIns
|
||
{mso-style-name:"";
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text-decoration:underline;
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|
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span.msoDel
|
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{mso-style-name:"";
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text-decoration:line-through;
|
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color:red;}
|
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.MsoChpDefault
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{font-size:10.0pt;}
|
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/* Page Definitions */
|
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@page WordSection1
|
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{size:595.3pt 841.9pt;
|
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margin:72.0pt 54.0pt 72.0pt 54.0pt;
|
||
layout-grid:15.6pt;}
|
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div.WordSection1
|
||
{page:WordSection1;}
|
||
/* List Definitions */
|
||
ol
|
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{margin-bottom:0cm;}
|
||
ul
|
||
{margin-bottom:0cm;}
|
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-->
|
||
</style>
|
||
|
||
</head>
|
||
|
||
<body lang=ZH-CN link=blue vlink=purple style='text-justify-trim:punctuation'>
|
||
|
||
<div class=WordSection1 style='layout-grid:15.6pt'>
|
||
|
||
<p class=ab><a name="_Toc53320648"><span style='font-family:<3A><><EFBFBD><EFBFBD>'><EFBFBD><EFBFBD><EFBFBD><EFBFBD></span><span
|
||
lang=EN-US>12-6 linux/fs/namei.c</span></a></p>
|
||
|
||
<div class=a align=center style='text-align:center'><span lang=EN-US>
|
||
|
||
<hr size=4 width="100%" align=center>
|
||
|
||
</span></div>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>1</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>2</span></u> <b><i> *
|
||
linux/fs/namei.c</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>3</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>4</span></u> <b><i> *
|
||
(C) 1991 Linus Torvalds</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>5</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>6</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>7</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>8</span></u> <b><i> *
|
||
Some corrections by tytso.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>9</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>10</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>11</span></u>
|
||
#include <linux/sched.h> // </span><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<span lang=EN-US>task_struct</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵȡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>12</span></u>
|
||
#include <linux/kernel.h> // </span><EFBFBD>ں<EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>ں˳<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD>ζ<EFBFBD><EFBFBD>塣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>13</span></u>
|
||
#include <asm/segment.h> // </span><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>йضμĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD>ຯ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>14</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>15</span></u>
|
||
#include <string.h> // </span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD>й<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>뺯<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>16</span></u>
|
||
#include <fcntl.h> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŵĶ<EFBFBD><EFBFBD>塣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>17</span></u>
|
||
#include <errno.h> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>и<EFBFBD><EFBFBD>ֳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>18</span></u>
|
||
#include <const.h> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ŀǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i_mode</span><EFBFBD>ֶεĸ<EFBFBD><EFBFBD><EFBFBD>־λ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>19</span></u>
|
||
#include <sys/stat.h> // </span><EFBFBD>ļ<EFBFBD>״̬ͷ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳ״̬<EFBFBD>ṹ<span
|
||
lang=EN-US>stat{}</span><EFBFBD>ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>20</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҷ<EFBFBD>Ӧ<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>21</span></u>
|
||
static struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>_namei</span></u>(const char * filename, struct <u><span
|
||
style='color:blue'>m_inode</span></u> * base,</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>22</span></u>
|
||
int follow_links);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>23</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>÷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>a[b]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>루<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϸ<EFBFBD><EFBFBD><EFBFBD>ƫ<EFBFBD>Ƶ<EFBFBD>ַ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD>ֵ <span
|
||
lang=EN-US>*(a + b)</span><EFBFBD><EFBFBD>ͬʱ<EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD><span lang=EN-US>a[b]</span>Ҳ<EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD>ʾ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>b[a]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˶<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊ <span lang=EN-US>"LoveYou"[2]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>2["LoveYou"]</span><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD>ͬ<EFBFBD><EFBFBD><span lang=EN-US>*("LoveYou"
|
||
+ 2)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>"LoveYou"</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>б<EFBFBD><EFBFBD>洢<EFBFBD><EFBFBD>λ<EFBFBD>þ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"LoveYou"[2]</span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ<span lang=EN-US>2</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><span lang=EN-US>"v"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>ASCII</span><EFBFBD><EFBFBD>ֵ<span lang=EN-US>0x76</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ð˽<EFBFBD><EFBFBD>Ʊ<EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0166</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>C</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD>ַ<EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>ASCII</span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>ASCII</span><EFBFBD><EFBFBD>ֵǰ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD>ܡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD> <span lang=EN-US>"v"</span><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD>ʾ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>"\x76"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"\166"</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˶<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>ASCII</span><EFBFBD><EFBFBD>ֵΪ<span
|
||
lang=EN-US>0x00--0x1f</span><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ϳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>ASCII</span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD>ꡣ<span
|
||
lang=EN-US>x</span><EFBFBD><EFBFBD>ͷ<EFBFBD>ļ<EFBFBD><span lang=EN-US>include/fcntl.h</span><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>7</span><EFBFBD>п<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>־<span
|
||
lang=EN-US>x</span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>˫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD>˽<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>ʵ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ʱ<EFBFBD>ʾ<span lang=EN-US>4</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"\004\002\006\377"</span><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>ִ<EFBFBD>е<EFBFBD>Ȩ<EFBFBD><EFBFBD>Ϊ<span lang=EN-US>:
|
||
r</span><EFBFBD><EFBFBD><span lang=EN-US>w</span><EFBFBD><EFBFBD><span lang=EN-US>rw</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>wxrwxrwx</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҷֱ<EFBFBD><EFBFBD>Ӧ<span
|
||
lang=EN-US>x</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<span lang=EN-US>0--3</span><EFBFBD><EFBFBD> <20><><EFBFBD>磬<EFBFBD><E7A3AC><EFBFBD><span lang=EN-US>x</span>Ϊ<span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú귵<EFBFBD>ذ˽<EFBFBD><EFBFBD><EFBFBD>ֵ<span lang=EN-US>006</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʾ<EFBFBD>ɶ<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><span
|
||
lang=EN-US>rw</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>O_ACCMODE = 00003</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<span
|
||
lang=EN-US>x</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>24</span></u>
|
||
#define <u><span style='color:blue'>ACC_MODE</span></u>(<u><span
|
||
style='color:blue'>x</span></u>) (<i>"\004\002\006\377"</i>[(<u><span
|
||
style='color:blue'>x</span></u>)&<u><span style='color:blue'>O_ACCMODE</span></u>])</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>25</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>26</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>27</span></u> <b><i> *
|
||
comment out this line if you want names > NAME_LEN chars to be</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>28</span></u> <b><i> *
|
||
truncated. Else they will be disallowed.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>29</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> > NAME_LEN</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>涨<EFBFBD><EFBFBD>ע<EFBFBD>͵<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>30</span></u> <b><i>/*
|
||
#define NO_TRUNCATE */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>31</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>32</span></u>
|
||
#define <u><span style='color:blue'>MAY_EXEC</span></u> 1
|
||
// </span><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><span lang=EN-US>(</span><EFBFBD>ɽ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>33</span></u>
|
||
#define <u><span style='color:blue'>MAY_WRITE</span></u> 2
|
||
// </span><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>34</span></u>
|
||
#define <u><span style='color:blue'>MAY_READ</span></u> 4
|
||
// </span><EFBFBD>ɶ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>35</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>36</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>37</span></u> <b><i> *
|
||
permission()</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>38</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>39</span></u> <b><i> *
|
||
is used to check for read/write/execute permissions on a file.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>40</span></u> <b><i> *
|
||
I don't know if we should look at just the euid or both euid and</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>41</span></u> <b><i> *
|
||
uid, but that should be easily changed.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>42</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * permission()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ķ<EFBFBD><span
|
||
lang=EN-US>/</span>д<span lang=EN-US>/</span>ִ<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޡ<EFBFBD><EFBFBD>Ҳ<EFBFBD>֪<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>euid</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>euid</span><EFBFBD><EFBFBD><span lang=EN-US>uid</span><EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>inode
|
||
- </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>룻<span lang=EN-US>mask - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɷ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>43</span></u>
|
||
static int <u><span style='color:blue'>permission</span></u>(struct <u><span
|
||
style='color:blue'>m_inode</span></u> * inode,int mask)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>44</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>45</span></u>
|
||
int mode = inode->i_mode; //
|
||
</span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>46</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>47</span></u> <b><i>/*
|
||
special case: not even root can read/write a deleted file */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>root</span><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ܶ<EFBFBD><span lang=EN-US>/</span>дһ<EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span lang=EN-US>
|
||
*/</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ж<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ѱ<EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ء<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD><span lang=EN-US>euid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD><span lang=EN-US>egid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>48</span></u>
|
||
if (inode->i_dev && !inode->i_nlinks)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>49</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>50</span></u>
|
||
else if (<u><span style='color:blue'>current</span></u>->euid==inode->i_uid)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>51</span></u>
|
||
mode >>= 6;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>52</span></u>
|
||
else if (<u><span style='color:blue'>in_group_p</span></u>(inode->i_gid))</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>53</span></u>
|
||
mode >>= 3;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ĵķ<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>54</span></u>
|
||
if (((mode & mask & 0007) == mask) || <u><span style='color:blue'>suser</span></u>())</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>55</span></u>
|
||
return 1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>56</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>57</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>58</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>59</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>60</span></u> <b><i> *
|
||
ok, we cannot use strncmp, as the name is not in our data space.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>61</span></u> <b><i> *
|
||
Thus we'll have to use match. No big problem. Match also makes</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>62</span></u> <b><i> *
|
||
some sanity tests.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>63</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>64</span></u> <b><i> *
|
||
NOTE! unlike strncmp, match returns 1 for success, 0 for failure.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>65</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * ok</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>strncmp</span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȽϺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>Ʋ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿռ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣩<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB>ʹ<EFBFBD><CAB9>
|
||
<span lang=EN-US>match()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⲻ<EFBFBD><EFBFBD><span lang=EN-US>match()</span>ͬ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD>ԡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><span
|
||
lang=EN-US>strncmp</span><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>match()</span><EFBFBD>ɹ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȽϺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>len
|
||
- </span><EFBFBD>Ƚϵ<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><span lang=EN-US>name - </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룻<span lang=EN-US>de - </span>Ŀ¼<EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>68</span><EFBFBD><EFBFBD><EFBFBD>϶<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>same</span><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>eax</span><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD>ڸ<EFBFBD>Ч</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ʡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>66</span></u>
|
||
static int <u><span style='color:blue'>match</span></u>(int len,const char *
|
||
name,struct <u><span style='color:blue'>dir_entry</span></u> * de)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>67</span></u> {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>68</span></u>
|
||
register int same __asm__(<i>"ax"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>69</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ƚϵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƥ<EFBFBD>䣩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƚϵij<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>len</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>'.'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ôһ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD>ƥ<EFBFBD>䣩<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ƚϵij<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>len</span>С<EFBFBD><EFBFBD><span lang=EN-US>NAME_LEN</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>len</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƥ<EFBFBD>䣩<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>75</span><EFBFBD><EFBFBD><EFBFBD>϶<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD>
|
||
<span lang=EN-US>len </span><EFBFBD><EFBFBD><EFBFBD>жϷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǽ<EFBFBD><EFBFBD> <span lang=EN-US>name[len] </span><EFBFBD>Ƿ<EFBFBD>Ϊ<span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>len</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>name[len]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>len</span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>name</span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><span
|
||
lang=EN-US>name[len]</span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>70</span></u>
|
||
if (!de || !de->inode || len > <u><span style='color:blue'>NAME_LEN</span></u>)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>71</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>72</span></u>
|
||
<b><i>/* "" means "." ---> so paths like
|
||
"/usr/lib//libc.a" work */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US>
|
||
/* "" </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>"." </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>---> </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>"/usr/lib//libc.a"
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>73</span></u>
|
||
if (!len && (de->name[0]==<i>'.'</i>) && (de->name[1]==<i>'\0'</i>))</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>74</span></u>
|
||
return 1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>75</span></u>
|
||
if (len < <u><span style='color:blue'>NAME_LEN</span></u> &&
|
||
de->name[len])</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>76</span></u>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD><EFBFBD>ٱȽϲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿռ䣨<span
|
||
lang=EN-US>fs</span><EFBFBD>Σ<EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ıȽ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>%0
|
||
- eax</span><EFBFBD><EFBFBD><EFBFBD>ȽϽ<EFBFBD><EFBFBD><span lang=EN-US>same</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>%1 - eax</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>eax</span><EFBFBD><EFBFBD>ֵ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>%2 - esi</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룩<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // %3 - edi</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룩<EFBFBD><EFBFBD><span
|
||
lang=EN-US>%4 - ecx(</span><EFBFBD>Ƚϵ<EFBFBD><EFBFBD>ֽڳ<EFBFBD><EFBFBD><EFBFBD>ֵ<span lang=EN-US>len)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>77</span></u>
|
||
__asm__(<i>"cld\n\t"</i>
|
||
// </span><EFBFBD>巽<EFBFBD><EFBFBD><EFBFBD>־λ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>78</span></u>
|
||
<i>"fs ; repe ; cmpsb\n\t"</i> // </span><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD>ִ<EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD><span
|
||
lang=EN-US>[esi++]</span><EFBFBD><EFBFBD><span lang=EN-US>[edi++]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>79</span></u>
|
||
<i>"setz %%al"</i>
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ȽϽ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>zf=0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>al=1</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>same=eax</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>80</span></u>
|
||
:<i>"=a"</i> (same)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>81</span></u>
|
||
:<i>""</i> (0),<i>"S"</i> ((long) name),<i>"D"</i>
|
||
((long) de->name),<i>"c"</i> (len)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>82</span></u>
|
||
:<i>"cx"</i>,<i>"di"</i>,<i>"si"</i>);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>83</span></u>
|
||
return same;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>رȽϽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>84</span></u> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>85</span></u> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>86</span></u> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>87</span></u> <b><i> *
|
||
find_entry()</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>88</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>89</span></u> <b><i> *
|
||
finds an entry in the specified directory with the wanted name. It</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>90</span></u> <b><i> *
|
||
returns the cache buffer in which the entry was found, and the entry</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>91</span></u> <b><i> *
|
||
itself (as a parameter - res_dir). It does NOT read the inode of the</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>92</span></u> <b><i> *
|
||
entry - you'll have to do that yourself if you want to.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>93</span></u> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>94</span></u> <b><i> *
|
||
This also takes care of the few special cases due to '..'-traversal</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>95</span></u> <b><i> *
|
||
over a pseudo-root and a mount point.</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>96</span></u> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> *
|
||
find_entry()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> - res_dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US> - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>'..'</span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD>Ҳ<EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>һ<EFBFBD><EFBFBD>α<EFBFBD><EFBFBD>Ŀ¼<EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD>㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>*dir
|
||
- </span>ָ<EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ָ<EFBFBD>룻<span lang=EN-US>name - </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>namelen - </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>'..'</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>linux/sched.c</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>151</span><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>ע<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>*res_dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD>롣ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>97</span></u>
|
||
static struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>find_entry</span></u>(struct <u><span style='color:blue'>m_inode</span></u>
|
||
** dir,</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>98</span></u>
|
||
const char * name, int namelen, struct <u><span style='color:blue'>dir_entry</span></u>
|
||
** res_dir)</span></p>
|
||
|
||
<p class=a><span lang=EN-US> <u><span style='color:blue'>99</span></u> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>100</span></u><span
|
||
lang=EN-US> int entries;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>101</span></u><span
|
||
lang=EN-US> int block,i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>102</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>103</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>104</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>super_block</span></u> * sb;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>105</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>Ҫ<EFBFBD>Ժ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϺ<EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>30</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD><EFBFBD>ų<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NO_TRUNCATE</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NAME_LEN</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>账<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NO_TRUNCATE</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NAME_LEN</span>ʱ<EFBFBD>ض<EFBFBD>֮<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>106</span></u><span
|
||
lang=EN-US> #ifdef NO_TRUNCATE</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>107</span></u><span
|
||
lang=EN-US> if (namelen > <u><span
|
||
style='color:blue'>NAME_LEN</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>108</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>109</span></u><span
|
||
lang=EN-US> #else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>110</span></u><span
|
||
lang=EN-US> if (namelen > <u><span
|
||
style='color:blue'>NAME_LEN</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>111</span></u><span
|
||
lang=EN-US>
|
||
namelen = <u><span style='color:blue'>NAME_LEN</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>112</span></u><span
|
||
lang=EN-US> #endif</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD>㱾Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>entries</span><EFBFBD><EFBFBD> Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD> <span lang=EN-US>i_size</span><EFBFBD>ֶ<EFBFBD><EFBFBD>к<EFBFBD><EFBFBD>б<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD>ȣ<EFBFBD><span
|
||
lang=EN-US>16</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵõ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>ÿշ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>113</span></u><span
|
||
lang=EN-US> entries =
|
||
(*dir)->i_size / (sizeof (struct <u><span style='color:blue'>dir_entry</span></u>));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>114</span></u><span
|
||
lang=EN-US> *res_dir = <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>'..'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>α<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>ܷ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ʸ<EFBFBD>Ŀ¼<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܺ<EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>丸Ŀ¼<EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸý<EFBFBD><EFBFBD>̱<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD>ĸ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>'.'</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>ROOT_INO</span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD>ţ<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ȷʵ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD>ĸ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ȡ<EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷŻ<EFBFBD>ԭ<span lang=EN-US>i</span><EFBFBD>ڵ㣬Ȼ<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>*dir</span>ָ<EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD><EFBFBD>Ҹ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵؽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD>͵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>:)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>115</span></u><span
|
||
lang=EN-US> <b><i>/* check for '..', as we might have to do some
|
||
"magic" for it */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD> <span
|
||
lang=EN-US>'..'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>116</span></u><span
|
||
lang=EN-US> if (namelen==2
|
||
&& <u><span style='color:blue'>get_fs_byte</span></u>(name)==<i>'.'</i>
|
||
&& <u><span style='color:blue'>get_fs_byte</span></u>(name+1)==<i>'.'</i>)
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>117</span></u><span
|
||
lang=EN-US> <b><i>/* '..' in a pseudo-root results in a faked '.' (just change
|
||
namelen) */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span>α<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD> <span lang=EN-US>'..'
|
||
</span><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> '.'</span><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>ı<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֳ<EFBFBD><EFBFBD>ȣ<EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>118</span></u><span
|
||
lang=EN-US>
|
||
if ((*dir) == <u><span style='color:blue'>current</span></u>->root)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>119</span></u><span
|
||
lang=EN-US>
|
||
namelen=1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>120</span></u><span
|
||
lang=EN-US>
|
||
else if ((*dir)->i_num == <u><span style='color:blue'>ROOT_INO</span></u>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>121</span></u><span
|
||
lang=EN-US> <b><i>/* '..' over a mount-point results in 'dir' being exchanged
|
||
for the mounted</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>122</span></u><span
|
||
lang=EN-US> <b><i> directory-inode. NOTE! We set mounted, so
|
||
that we can iput the new dir */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /* </span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD> <span
|
||
lang=EN-US>'..' </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ϡ<EFBFBD>ע<EFBFBD>⣡</p>
|
||
|
||
<p class=a><span lang=EN-US> </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>mounted</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD>Żظ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>123</span></u><span
|
||
lang=EN-US> sb=<u><span
|
||
style='color:blue'>get_super</span></u>((*dir)->i_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>124</span></u><span
|
||
lang=EN-US>
|
||
if (sb->s_imount) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>125</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(*dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>126</span></u><span
|
||
lang=EN-US>
|
||
(*dir)=sb->s_imount;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>127</span></u><span
|
||
lang=EN-US>
|
||
(*dir)->i_count++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>128</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>129</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>130</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʲô<EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ飨<EFBFBD><EFBFBD><EFBFBD>飩<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD>ű<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ṹ<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>i_zone[9]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD>ĵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD>ֱ<EFBFBD>Ӵ<EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD>ⲻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ǿʹӽڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ顣<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>131</span></u><span
|
||
lang=EN-US> if (!(block =
|
||
(*dir)->i_zone[0]))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>132</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>133</span></u><span
|
||
lang=EN-US> if (!(bh = <u><span
|
||
style='color:blue'>bread</span></u>((*dir)->i_dev,block)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>134</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ鲿<EFBFBD>֣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>£<EFBFBD>ѭ<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD>е<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼʱ<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>135</span></u><span
|
||
lang=EN-US> i = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>136</span></u><span
|
||
lang=EN-US> de = (struct <u><span
|
||
style='color:blue'>dir_entry</span></u> *) bh->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>137</span></u><span
|
||
lang=EN-US> while (i <
|
||
entries) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>꣬<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŵ<EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ顣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٶ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD>ֻҪ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD>ÿ鲻<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>de </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ飬Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>141</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i/DIR_ENTRIES_PER_BLOCK</span><EFBFBD>ɵõ<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>еĿ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>bmap()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>inode.c</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>142</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>ɼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>138</span></u><span
|
||
lang=EN-US>
|
||
if ((char *)de >= <u><span style='color:blue'>BLOCK_SIZE</span></u>+bh->b_data)
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>139</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>140</span></u><span
|
||
lang=EN-US>
|
||
bh = <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>141</span></u><span
|
||
lang=EN-US>
|
||
if (!(block = <u><span style='color:blue'>bmap</span></u>(*dir,i/<u><span
|
||
style='color:blue'>DIR_ENTRIES_PER_BLOCK</span></u>)) ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>142</span></u><span
|
||
lang=EN-US>
|
||
!(bh = <u><span style='color:blue'>bread</span></u>((*dir)->i_dev,block))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>143</span></u><span
|
||
lang=EN-US>
|
||
i += <u><span style='color:blue'>DIR_ENTRIES_PER_BLOCK</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>144</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>145</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>146</span></u><span
|
||
lang=EN-US>
|
||
de = (struct <u><span style='color:blue'>dir_entry</span></u> *) bh->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>147</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>*dir</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD>бȽ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>148</span></u><span
|
||
lang=EN-US>
|
||
if (<u><span style='color:blue'>match</span></u>(namelen,name,de)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>149</span></u><span
|
||
lang=EN-US>
|
||
*res_dir = de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>150</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>151</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>152</span></u><span
|
||
lang=EN-US>
|
||
de++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>153</span></u><span
|
||
lang=EN-US>
|
||
i++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>154</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD>ʧ<EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>155</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>156</span></u><span
|
||
lang=EN-US> return <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>157</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>158</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>159</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>160</span></u><span
|
||
lang=EN-US> <b><i> * add_entry()</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>161</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>162</span></u><span
|
||
lang=EN-US> <b><i> * adds a file entry to the specified directory, using
|
||
the same</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>163</span></u><span
|
||
lang=EN-US> <b><i> * semantics as find_entry(). It returns NULL if it
|
||
failed.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>164</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>165</span></u><span
|
||
lang=EN-US> <b><i> * NOTE!! The inode part of 'de' is left at 0 - which
|
||
means you</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>166</span></u><span
|
||
lang=EN-US> <b><i> * may not sleep between calling this and putting something
|
||
into</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>167</span></u><span
|
||
lang=EN-US> <b><i> * the entry, as someone else might have used it while
|
||
you slept.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>168</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * add_entry()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>find_entry()</span>ͬ<EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> *</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><span
|
||
lang=EN-US>'de'</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD>룩<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㲿<EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0 - </span><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>ʾ<EFBFBD>ڵ<EFBFBD><EFBFBD>øú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ֮<EFBFBD>䲻<EFBFBD><EFBFBD>ȥ˯<EFBFBD>ߡ<EFBFBD>
|
||
<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>˯<EFBFBD>ߣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD>˸<EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>dir
|
||
- </span>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣻<span lang=EN-US>name - </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>namelen - </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룻<span
|
||
lang=EN-US>res_dir - </span><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD>룻</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>169</span></u><span
|
||
lang=EN-US> static struct <u><span style='color:blue'>buffer_head</span></u> * <u><span
|
||
style='color:blue'>add_entry</span></u>(struct <u><span style='color:blue'>m_inode</span></u>
|
||
* dir,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>170</span></u><span
|
||
lang=EN-US> const char * name,
|
||
int namelen, struct <u><span style='color:blue'>dir_entry</span></u> **
|
||
res_dir)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>171</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>172</span></u><span
|
||
lang=EN-US> int block,i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>173</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>174</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>175</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>Ҫ<EFBFBD>Ժ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϺ<EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>30</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˷<EFBFBD><EFBFBD>ų<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NO_TRUNCATE</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NAME_LEN</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>账<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NO_TRUNCATE</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NAME_LEN</span>ʱ<EFBFBD>ض<EFBFBD>֮<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>176</span></u><span
|
||
lang=EN-US> *res_dir = <u><span
|
||
style='color:blue'>NULL</span></u>;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>177</span></u><span
|
||
lang=EN-US> #ifdef NO_TRUNCATE</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>178</span></u><span
|
||
lang=EN-US> if (namelen > <u><span
|
||
style='color:blue'>NAME_LEN</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>179</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>180</span></u><span
|
||
lang=EN-US> #else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>181</span></u><span
|
||
lang=EN-US> if (namelen > <u><span
|
||
style='color:blue'>NAME_LEN</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>182</span></u><span
|
||
lang=EN-US>
|
||
namelen = <u><span style='color:blue'>NAME_LEN</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>183</span></u><span
|
||
lang=EN-US> #endif</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ȶ<EFBFBD>ȡĿ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ飨<EFBFBD><EFBFBD><EFBFBD>飩<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ű<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ṹ<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>i_zone[9]</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ĵ<EFBFBD>һ<EFBFBD><EFBFBD>ֱ<EFBFBD>Ӵ<EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD>ⲻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿʹӽڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD>ȡָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ顣<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>184</span></u><span
|
||
lang=EN-US> if (!namelen)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>185</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>186</span></u><span
|
||
lang=EN-US> if (!(block =
|
||
dir->i_zone[0]))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>187</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>188</span></u><span
|
||
lang=EN-US> if (!(bh = <u><span
|
||
style='color:blue'>bread</span></u>(dir->i_dev,block)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>189</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>δʹ<EFBFBD>õĿ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ鲿<EFBFBD>֣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>е<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼʱ<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>190</span></u><span
|
||
lang=EN-US> i = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>191</span></u><span
|
||
lang=EN-US> de = (struct <u><span
|
||
style='color:blue'>dir_entry</span></u> *) bh->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>192</span></u><span
|
||
lang=EN-US> while (1) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>Ŀ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŵ<EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݿ飬<EFBFBD>ٶ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鲻<EFBFBD><EFBFBD><EFBFBD>ھʹ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>顣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD>ؿա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˴ζ<EFBFBD>ȡ<EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD><EFBFBD>صĻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD><EFBFBD>´<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀտ飬<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // DIR_ENTRIES_PER_BLOCK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ鲢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD>¶<EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span>ָ<EFBFBD><EFBFBD>ÿ<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><EFBFBD>֣<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>м<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>196</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ϵ<EFBFBD> <span lang=EN-US>i/DIR_ENTRIES_PER_BLOCK
|
||
</span><EFBFBD>ɼ<EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ļ<EFBFBD><EFBFBD>еĿ<EFBFBD>ţ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>create_block()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>inode.c</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>147</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>ɶ<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>193</span></u><span
|
||
lang=EN-US>
|
||
if ((char *)de >= <u><span style='color:blue'>BLOCK_SIZE</span></u>+bh->b_data)
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>194</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>195</span></u><span
|
||
lang=EN-US>
|
||
bh = <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>196</span></u><span
|
||
lang=EN-US>
|
||
block = <u><span style='color:blue'>create_block</span></u>(dir,i/<u><span
|
||
style='color:blue'>DIR_ENTRIES_PER_BLOCK</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>197</span></u><span
|
||
lang=EN-US>
|
||
if (!block)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>198</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>199</span></u><span
|
||
lang=EN-US>
|
||
if (!(bh = <u><span style='color:blue'>bread</span></u>(dir->i_dev,block)))
|
||
{ // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>200</span></u><span
|
||
lang=EN-US>
|
||
i += <u><span style='color:blue'>DIR_ENTRIES_PER_BLOCK</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>201</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>202</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>203</span></u><span
|
||
lang=EN-US>
|
||
de = (struct <u><span style='color:blue'>dir_entry</span></u> *) bh->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>204</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ṹ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˸<EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>Ϣ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD><EFBFBD><EFBFBD>ֵ <span
|
||
lang=EN-US>i_size </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>µĿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD>ܰ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ӵ<EFBFBD>Ŀ¼<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>ĩ<EFBFBD>˴<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǶԸô<EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD>ø<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¸<EFBFBD>Ŀ¼<EFBFBD>ļ<EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD>¸<EFBFBD>Ŀ¼<EFBFBD>ĸı<EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>205</span></u><span
|
||
lang=EN-US>
|
||
if (i*sizeof(struct <u><span style='color:blue'>dir_entry</span></u>) >=
|
||
dir->i_size) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>206</span></u><span
|
||
lang=EN-US>
|
||
de->inode=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>207</span></u><span
|
||
lang=EN-US>
|
||
dir->i_size = (i+1)*sizeof(struct <u><span style='color:blue'>dir_entry</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>208</span></u><span
|
||
lang=EN-US>
|
||
dir->i_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>209</span></u><span
|
||
lang=EN-US>
|
||
dir->i_ctime = <u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>210</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD> <span
|
||
lang=EN-US>de </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>ҵ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>δʹ<EFBFBD>õĿ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶΣ<EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD>б<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD>ø<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>211</span></u><span
|
||
lang=EN-US>
|
||
if (!de->inode) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>212</span></u><span
|
||
lang=EN-US>
|
||
dir->i_mtime = <u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>213</span></u><span
|
||
lang=EN-US>
|
||
for (i=0; i < <u><span style='color:blue'>NAME_LEN</span></u> ; i++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>214</span></u><span
|
||
lang=EN-US>
|
||
de->name[i]=(i<namelen)?<u><span style='color:blue'>get_fs_byte</span></u>(name+i):0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>215</span></u><span
|
||
lang=EN-US>
|
||
bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>216</span></u><span
|
||
lang=EN-US>
|
||
*res_dir = de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>217</span></u><span
|
||
lang=EN-US>
|
||
return bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>218</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>219</span></u><span
|
||
lang=EN-US>
|
||
de++; // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>220</span></u><span
|
||
lang=EN-US>
|
||
i++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>221</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>Linus</span><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>δ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ȸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>find_entry()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ĵ<EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ijɱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US style='font-family:Wingdings'>J</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>222</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>223</span></u><span
|
||
lang=EN-US> return <u><span
|
||
style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>224</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>225</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD>ҷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>dir
|
||
- </span>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㣻<span lang=EN-US>inode - </span>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>226</span></u><span
|
||
lang=EN-US> static struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>follow_link</span></u>(struct <u><span style='color:blue'>m_inode</span></u>
|
||
* dir, struct <u><span style='color:blue'>m_inode</span></u> * inode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>227</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>228</span></u><span
|
||
lang=EN-US> unsigned short fs;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>229</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>230</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>и<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD>ʹ<EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>и<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>ӷ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>inode</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>231</span></u><span
|
||
lang=EN-US> if (!dir) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>232</span></u><span
|
||
lang=EN-US>
|
||
dir = <u><span style='color:blue'>current</span></u>->root;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>233</span></u><span
|
||
lang=EN-US>
|
||
dir->i_count++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>234</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>235</span></u><span
|
||
lang=EN-US> if (!inode) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>236</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>237</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>238</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>239</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>S_ISLNK</span></u>(inode->i_mode)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>240</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>241</span></u><span
|
||
lang=EN-US>
|
||
return inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>242</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD>ȡ<span lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶε<EFBFBD>ѡ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0x17</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span>û<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ݶΣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>߸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD>ֱ<EFBFBD>ӿ<EFBFBD><EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>ȡ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>ֱ<EFBFBD>ӿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ż<EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㲢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶΡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD>ض<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>bh </span>ָ<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>н<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>243</span></u><span
|
||
lang=EN-US> __asm__(<i>"mov
|
||
%%fs,%0"</i>:<i>"=r"</i> (fs));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>244</span></u><span
|
||
lang=EN-US> if (fs != 0x17 ||
|
||
!inode->i_zone[0] ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>245</span></u><span
|
||
lang=EN-US>
|
||
!(bh = <u><span style='color:blue'>bread</span></u>(inode->i_dev,
|
||
inode->i_zone[0]))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>246</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>247</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>248</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>249</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żء<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD>Ǿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ں˺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿռ<EFBFBD><EFBFBD>еģ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>fs </span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ռ䴫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD><EFBFBD>ں˿ռ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD>ں˿ռ<EFBFBD><EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD>ش<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>λ<EFBFBD><EFBFBD><EFBFBD>ں<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>fs</span><EFBFBD>μĴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱָ<EFBFBD><EFBFBD><EFBFBD>ں˿ռ䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>fs =0x10</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻָ<EFBFBD>ԭ<span
|
||
lang=EN-US>fs</span><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>_namei()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD>ķ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>250</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>251</span></u><span
|
||
lang=EN-US> __asm__(<i>"mov
|
||
%0,%%fs"</i>::<i>"r"</i> ((unsigned short) 0x10));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>252</span></u><span
|
||
lang=EN-US> inode = <u><span
|
||
style='color:blue'>_namei</span></u>(bh->b_data,dir,0);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>253</span></u><span
|
||
lang=EN-US> __asm__(<i>"mov
|
||
%0,%%fs"</i>::<i>"r"</i> (fs));</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>254</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>255</span></u><span
|
||
lang=EN-US> return inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>256</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>257</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>258</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>259</span></u><span
|
||
lang=EN-US> <b><i> * get_dir()</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>260</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>261</span></u><span
|
||
lang=EN-US> <b><i> * Getdir traverses the pathname until it hits the
|
||
topmost directory.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>262</span></u><span
|
||
lang=EN-US> <b><i> * It returns NULL on failure.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>263</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> *
|
||
get_dir()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD>ﵽ<EFBFBD><EFBFBD>˵<EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>Ѱָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname
|
||
- </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>inode - </span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>롣ʧ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>264</span></u><span
|
||
lang=EN-US> static struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>get_dir</span></u>(const char * pathname, struct <u><span
|
||
style='color:blue'>m_inode</span></u> * inode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>265</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>266</span></u><span
|
||
lang=EN-US> char c;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>267</span></u><span
|
||
lang=EN-US> const char * <u><span
|
||
style='color:blue'>thisname</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>268</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>269</span></u><span
|
||
lang=EN-US> int namelen,inr;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>270</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>271</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>272</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>inode</span>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵ĵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'/'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ӧ<EFBFBD>ôӵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>α<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㿪ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ȷŻز<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>趨<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD>ȡ<EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õĸ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣Ȼ<EFBFBD><EFBFBD>Ѹ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĵ<EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD> <span lang=EN-US>'/'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><EFBFBD>Ա<EFBFBD>֤<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>趨<EFBFBD>ĸ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>273</span></u><span
|
||
lang=EN-US> if (!inode) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>274</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>current</span></u>->pwd;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD>̵ĵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>275</span></u><span
|
||
lang=EN-US>
|
||
inode->i_count++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>276</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>277</span></u><span
|
||
lang=EN-US> if ((c=<u><span
|
||
style='color:blue'>get_fs_byte</span></u>(pathname))==<i>'/'</i>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>278</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);
|
||
// </span><EFBFBD>Ż<EFBFBD>ԭ<span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>279</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>current</span></u>->root;
|
||
// </span>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>280</span></u><span
|
||
lang=EN-US>
|
||
pathname++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>281</span></u><span
|
||
lang=EN-US>
|
||
inode->i_count++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>282</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еĸ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֺ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ե<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD> <span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD>жϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ұѱ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>thisname </span>ָ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>п<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD> <20><>Ȼ<EFBFBD>ڸս<DAB8><D5BD><EFBFBD>ѭ<EFBFBD><D1AD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>ǰ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span
|
||
lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD≯<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>283</span></u><span
|
||
lang=EN-US> while (1) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>284</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>thisname</span></u> = pathname;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>285</span></u><span
|
||
lang=EN-US>
|
||
if (!<u><span style='color:blue'>S_ISDIR</span></u>(inode->i_mode) || !<u><span
|
||
style='color:blue'>permission</span></u>(inode,<u><span style='color:blue'>MAY_EXEC</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>286</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>287</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>288</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ÿ<EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>Ҫ<EFBFBD><EFBFBD>·</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>з<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵӵ<EFBFBD>ǰ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>pathname </span><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><span lang=EN-US>'/'</span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>namelen </span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵij<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>thisname </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵĿ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ǽ<EFBFBD>β<EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩβ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ظ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>м<EFBFBD><EFBFBD><EFBFBD>
|
||
<span lang=EN-US>'/'</span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>᷵<EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣡<EFBFBD><EFBFBD><EFBFBD>磺<EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>/usr/src/linux</span><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>src/</span>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>289</span></u><span
|
||
lang=EN-US>
|
||
for(namelen=0;(c=<u><span style='color:blue'>get_fs_byte</span></u>(pathname++))&&(c!=<i>'/'</i>);namelen++)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>290</span></u><span
|
||
lang=EN-US>
|
||
<b><i>/* nothing */</i></b> ;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>291</span></u><span
|
||
lang=EN-US>
|
||
if (!c)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>292</span></u><span
|
||
lang=EN-US>
|
||
return inode;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵõ<EFBFBD><EFBFBD><EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǵ<EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>find_entry()</span><EFBFBD>ڵ<EFBFBD>ǰ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><span lang=EN-US>inr</span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><span lang=EN-US>idev</span><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>鲢<EFBFBD>Żظ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣
|
||
Ȼ<EFBFBD><EFBFBD>ȡ<EFBFBD>ڵ<EFBFBD><EFBFBD><span lang=EN-US>inr</span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ը<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>һĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><span lang=EN-US>follow_link()</span><EFBFBD>Ϳ<EFBFBD><EFBFBD>Եõ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>293</span></u><span
|
||
lang=EN-US>
|
||
if (!(bh = <u><span style='color:blue'>find_entry</span></u>(&inode,<u><span
|
||
style='color:blue'>thisname</span></u>,namelen,&de))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>294</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>295</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>296</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>297</span></u><span
|
||
lang=EN-US>
|
||
inr = de->inode;
|
||
// </span><EFBFBD><EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>298</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>299</span></u><span
|
||
lang=EN-US>
|
||
dir = inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>300</span></u><span
|
||
lang=EN-US>
|
||
if (!(inode = <u><span style='color:blue'>iget</span></u>(dir->i_dev,inr)))
|
||
{ // </span>ȡ<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>301</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>302</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>303</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>304</span></u><span
|
||
lang=EN-US>
|
||
if (!(inode = <u><span style='color:blue'>follow_link</span></u>(dir,inode)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>305</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>306</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>307</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>308</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>309</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>310</span></u><span
|
||
lang=EN-US> <b><i> * dir_namei()</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>311</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>312</span></u><span
|
||
lang=EN-US> <b><i> * dir_namei() returns the inode of the directory of the</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>313</span></u><span
|
||
lang=EN-US> <b><i> * specified name, and the name within that directory.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>314</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * dir_namei()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span></p>
|
||
|
||
<p class=a><span lang=EN-US> * dir_namei()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>룬<EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ơ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname
|
||
- </span>Ŀ¼·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>namelen - </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><span lang=EN-US>name - </span><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // base - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ƽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ע<EFBFBD>⣡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĩ<EFBFBD>˵<EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>315</span></u><span
|
||
lang=EN-US> static struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>dir_namei</span></u>(const char * pathname,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>316</span></u><span
|
||
lang=EN-US> int * namelen,
|
||
const char ** name, struct <u><span style='color:blue'>m_inode</span></u> *
|
||
base)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>317</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>318</span></u><span
|
||
lang=EN-US> char c;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>319</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>320</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>321</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣Ȼ<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD><span lang=EN-US>'/'</span><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䳤<EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>롣ע<EFBFBD>⣡<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><span
|
||
lang=EN-US>'/'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ϊ<EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҳ<EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><span
|
||
lang=EN-US>i</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>'/'</span><EFBFBD>ַ<EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>289</span><EFBFBD><EFBFBD><EFBFBD>ϵġ<EFBFBD>ע<EFBFBD>⡱˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>322</span></u><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>get_dir</span></u>(pathname,base)))
|
||
// base</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>323</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>324</span></u><span
|
||
lang=EN-US> basename =
|
||
pathname;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>325</span></u><span
|
||
lang=EN-US> while (c=<u><span
|
||
style='color:blue'>get_fs_byte</span></u>(pathname++))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>326</span></u><span
|
||
lang=EN-US>
|
||
if (c==<i>'/'</i>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>327</span></u><span
|
||
lang=EN-US>
|
||
basename=pathname;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>328</span></u><span
|
||
lang=EN-US> *namelen =
|
||
pathname-basename-1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>329</span></u><span
|
||
lang=EN-US> *name = basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>330</span></u><span
|
||
lang=EN-US> return dir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>331</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>332</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ȡָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname
|
||
- </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>base - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㣻<span
|
||
lang=EN-US>follow_links - </span><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵı<EFBFBD>־<EFBFBD><EFBFBD><span
|
||
lang=EN-US>1 - </span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>333</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>_namei</span></u>(const char * pathname, struct <u><span
|
||
style='color:blue'>m_inode</span></u> * base,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>334</span></u><span
|
||
lang=EN-US> int follow_links)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>335</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>336</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>337</span></u><span
|
||
lang=EN-US> int inr,namelen;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>338</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>339</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>340</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>341</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>NULL</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>ӷ<EFBFBD><EFBFBD>ظ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֳ<EFBFBD><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼĿ¼<span
|
||
lang=EN-US>base</span><EFBFBD><EFBFBD><EFBFBD>ٴε<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>dir_namei()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>жϡ<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>311</span></u><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(pathname,&namelen,&basename)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>312</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>313</span></u><span
|
||
lang=EN-US> if
|
||
(!namelen)
|
||
<b><i>/* special case: '/usr/' etc */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>314</span></u><span
|
||
lang=EN-US>
|
||
return dir;
|
||
/* </span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span lang=EN-US>'/usr/'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>342</span></u><span
|
||
lang=EN-US> if (!(base = <u><span
|
||
style='color:blue'>dir_namei</span></u>(pathname,&namelen,&basename,base)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>343</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>344</span></u><span
|
||
lang=EN-US> if
|
||
(!namelen)
|
||
<b><i>/* special case: '/usr/' etc */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>345</span></u><span
|
||
lang=EN-US>
|
||
return base;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD>صĶ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣ע<EFBFBD>⣡<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>м<EFBFBD><span
|
||
lang=EN-US>'/'</span><EFBFBD><EFBFBD><EFBFBD>᷵<EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣡 <20><><EFBFBD>磺<span
|
||
lang=EN-US>/usr/src/linux</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>src/</span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>dir_namei() </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>'/'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>Ѱ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㺯<EFBFBD><EFBFBD><span lang=EN-US>find_entry()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<span lang=EN-US>de</span><EFBFBD>к<EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><span
|
||
lang=EN-US>dir</span><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>346</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&base,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>347</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>348</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(base);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>349</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>350</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>鲢<EFBFBD>Ż<EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㡣Ȼ<EFBFBD><EFBFBD>ȡ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ӧ<EFBFBD>ڵ<EFBFBD>ŵ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>䱻<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD><span lang=EN-US>inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>follow_link()</span><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>351</span></u><span
|
||
lang=EN-US> inr = de->inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>352</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>353</span></u><span
|
||
lang=EN-US> if (!(inode = <u><span
|
||
style='color:blue'>iget</span></u>(base->i_dev,inr))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>354</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(base);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>355</span></u><span
|
||
lang=EN-US>
|
||
return <u><span style='color:blue'>NULL</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>356</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>357</span></u><span
|
||
lang=EN-US> if (follow_links)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>358</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>follow_link</span></u>(base,inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>359</span></u><span
|
||
lang=EN-US> else</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>360</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(base);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>361</span></u><span
|
||
lang=EN-US> inode->i_atime=<u><span
|
||
style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>362</span></u><span
|
||
lang=EN-US> inode->i_dirt=1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>363</span></u><span
|
||
lang=EN-US> return inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>364</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>365</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ȡָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname
|
||
- </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>366</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>lnamei</span></u>(const char * pathname)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>367</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>368</span></u><span
|
||
lang=EN-US> return <u><span
|
||
style='color:blue'>_namei</span></u>(pathname, <u><span style='color:blue'>NULL</span></u>,
|
||
0);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>369</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>370</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>371</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>372</span></u><span
|
||
lang=EN-US> <b><i> * namei()</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>373</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>374</span></u><span
|
||
lang=EN-US> <b><i> * is used by most simple commands to get the inode of a
|
||
specified name.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>375</span></u><span
|
||
lang=EN-US> <b><i> * Open, link etc use their own routines, but this is
|
||
enough for things</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>376</span></u><span
|
||
lang=EN-US> <b><i> * like 'chmod' etc.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>377</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * namei()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<span lang=EN-US>open</span><EFBFBD><EFBFBD><span lang=EN-US>link</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<span
|
||
lang=EN-US>'chmod'</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>㹻<EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ȡָ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname
|
||
- </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>378</span></u><span
|
||
lang=EN-US> struct <u><span style='color:blue'>m_inode</span></u> * <u><span
|
||
style='color:blue'>namei</span></u>(const char * pathname)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>379</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>380</span></u><span
|
||
lang=EN-US> return <u><span
|
||
style='color:blue'>_namei</span></u>(pathname,<u><span style='color:blue'>NULL</span></u>,1);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>381</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>382</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>383</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>384</span></u><span
|
||
lang=EN-US> <b><i> * open_namei()</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>385</span></u><span
|
||
lang=EN-US> <b><i> *</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>386</span></u><span
|
||
lang=EN-US> <b><i> * namei for open - this is in fact almost the whole
|
||
open-routine.</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>387</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * open_namei()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span></p>
|
||
|
||
<p class=a><span lang=EN-US> * open()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD><span
|
||
lang=EN-US>namei</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> - </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>namei</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>filename</span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>flag</span><EFBFBD>Ǵ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡֵ<span lang=EN-US>O_RDONLY</span><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>O_WRONLY</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ֻд<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>O_RDWR</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><span
|
||
lang=EN-US>O_CREAT</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>O_EXCL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>벻<EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // O_APPEND</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // mode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>S_IRWXU</span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // S_IRUSR</span><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD>ļ<EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>S_IRWXG</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD>ȵȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻӦ<EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD>ʣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ɶ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><span
|
||
lang=EN-US>sys/stat.h</span><EFBFBD><EFBFBD><span lang=EN-US>fcntl.h</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>룻<span lang=EN-US>res_inode - </span><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD>ļ<EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>388</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>open_namei</span></u>(const char *
|
||
pathname, int flag, int mode,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>389</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> ** res_inode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>390</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>391</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>392</span></u><span
|
||
lang=EN-US> int
|
||
inr,dev,namelen;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>393</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir, *inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>394</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>395</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>396</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȶԺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>к<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD>־<EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־</p>
|
||
|
||
<p class=a><span lang=EN-US> // O_TRUNC</span>ȴ<EFBFBD><EFBFBD>λ<EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻд<EFBFBD><EFBFBD>־<span
|
||
lang=EN-US>O_WRONLY</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>־<span lang=EN-US>O_TRUNC</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ʹ<EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ε<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>Ӧλ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>־<span
|
||
lang=EN-US>I_REGULAR</span><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڶ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD><EFBFBD>μ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>411</span><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD>ע<EFBFBD>͡<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>397</span></u><span
|
||
lang=EN-US> if ((flag & <u><span
|
||
style='color:blue'>O_TRUNC</span></u>) && !(flag & <u><span
|
||
style='color:blue'>O_ACCMODE</span></u>))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>398</span></u><span
|
||
lang=EN-US>
|
||
flag |= <u><span style='color:blue'>O_WRONLY</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>399</span></u><span
|
||
lang=EN-US> mode &= 0777
|
||
& ~current-><u><span style='color:blue'>umask</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>400</span></u><span
|
||
lang=EN-US> mode |= <u><span
|
||
style='color:blue'>I_REGULAR</span></u>;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>μ<EFBFBD><span lang=EN-US>include/const.h</span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѱ<EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䳤<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><span lang=EN-US>'</span><span lang=EN-US>/usr/' </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ƚ<EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD>ӷ<EFBFBD><EFBFBD>ظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㲢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̲<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǷŻظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>401</span></u><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(pathname,&namelen,&basename,<u><span
|
||
style='color:blue'>NULL</span></u>)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>402</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>403</span></u><span
|
||
lang=EN-US> if (!namelen)
|
||
{
|
||
<b><i>/* special case: '/usr/' etc */</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>404</span></u><span
|
||
lang=EN-US>
|
||
if (!(flag & (<u><span style='color:blue'>O_ACCMODE</span></u>|<u><span
|
||
style='color:blue'>O_CREAT</span></u>|<u><span style='color:blue'>O_TRUNC</span></u>)))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>405</span></u><span
|
||
lang=EN-US>
|
||
*res_inode=dir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>406</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>407</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>408</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>409</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EISDIR</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>410</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹ<span
|
||
lang=EN-US>de</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬʱ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣 <20><><EFBFBD><EFBFBD>ø<EFBFBD><C3B8>ٻ<EFBFBD><D9BB><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ָ<EFBFBD><EFBFBD>Ϊ<span lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾû<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||
<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ڸ<EFBFBD>Ŀ¼û<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>411</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>412</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>413</span></u><span
|
||
lang=EN-US>
|
||
if (!(flag & <u><span style='color:blue'>O_CREAT</span></u>)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>414</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>415</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>416</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>417</span></u><span
|
||
lang=EN-US>
|
||
if (!<u><span style='color:blue'>permission</span></u>(dir,<u><span
|
||
style='color:blue'>MAY_WRITE</span></u>)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>418</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>419</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>420</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɡ<EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><C7BE><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ӧ<EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ʹ<EFBFBD>á<EFBFBD>
|
||
<EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>п<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ø<EFBFBD><EFBFBD><EFBFBD> <span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>г<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD>ýڵ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span lang=EN-US>id</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>421</span></u><span
|
||
lang=EN-US>
|
||
inode = <u><span style='color:blue'>new_inode</span></u>(dir->i_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>422</span></u><span
|
||
lang=EN-US>
|
||
if (!inode) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>423</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>424</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>425</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>426</span></u><span
|
||
lang=EN-US>
|
||
inode->i_uid = <u><span style='color:blue'>current</span></u>->euid;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>427</span></u><span
|
||
lang=EN-US>
|
||
inode->i_mode = mode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>428</span></u><span
|
||
lang=EN-US>
|
||
inode->i_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>429</span></u><span
|
||
lang=EN-US>
|
||
bh = <u><span style='color:blue'>add_entry</span></u>(dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>Ӧ<EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㲢<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD>
|
||
<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><C3B8><EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD>һЩ<D2BB><D0A9>ʼֵ<CABC><D6B5><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ĺ<EFBFBD><EFBFBD>룻<EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD>
|
||
Ȼ<EFBFBD><EFBFBD><EFBFBD>ͷŸø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>430</span></u><span
|
||
lang=EN-US>
|
||
if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>431</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>432</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>433</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>434</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>435</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>436</span></u><span
|
||
lang=EN-US>
|
||
de->inode = inode->i_num;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>437</span></u><span
|
||
lang=EN-US>
|
||
bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>438</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>439</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>440</span></u><span
|
||
lang=EN-US>
|
||
*res_inode = inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>441</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>442</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>棨<span lang=EN-US>411</span><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ȡ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӦĿ¼<EFBFBD><EFBFBD>ṹ<EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ź<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸø<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<span lang=EN-US>O_EXCL</span><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>443</span></u><span
|
||
lang=EN-US> inr = de->inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>444</span></u><span
|
||
lang=EN-US> dev =
|
||
dir->i_dev;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>445</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>446</span></u><span
|
||
lang=EN-US> if (flag & <u><span
|
||
style='color:blue'>O_EXCL</span></u>) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>447</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>448</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EEXIST</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>449</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD>ȡ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㲢<EFBFBD>ҷ<EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD>ֻ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>д<EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>з<EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>450</span></u><span
|
||
lang=EN-US> if (!(inode = <u><span
|
||
style='color:blue'>follow_link</span></u>(dir,<u><span style='color:blue'>iget</span></u>(dev,inr))))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>451</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>452</span></u><span
|
||
lang=EN-US> if ((<u><span
|
||
style='color:blue'>S_ISDIR</span></u>(inode->i_mode) && (flag & <u><span
|
||
style='color:blue'>O_ACCMODE</span></u>)) ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>453</span></u><span
|
||
lang=EN-US>
|
||
!<u><span style='color:blue'>permission</span></u>(inode,<u><span
|
||
style='color:blue'>ACC_MODE</span></u>(flag))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>454</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>455</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>456</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD>¸<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD>ֵΪ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˽<EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƚ<EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ָ<EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>457</span></u><span
|
||
lang=EN-US> inode->i_atime =
|
||
<u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>458</span></u><span
|
||
lang=EN-US> if (flag & <u><span
|
||
style='color:blue'>O_TRUNC</span></u>)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>459</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>truncate</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>460</span></u><span
|
||
lang=EN-US> *res_inode = inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>461</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>462</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>463</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD>ļ<EFBFBD><EFBFBD>ڵ㣨<span
|
||
lang=EN-US>node</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>filename</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mode</span><EFBFBD><EFBFBD><span lang=EN-US>dev</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳ<EFBFBD>ڵ㣨<EFBFBD><EFBFBD>ͨ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>filename
|
||
- </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mode - </span>ָ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><span lang=EN-US>dev
|
||
- </span><EFBFBD>豸<EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>464</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>sys_mknod</span></u>(const char *
|
||
filename, int mode, int dev)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>465</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>466</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>467</span></u><span
|
||
lang=EN-US> int namelen;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>468</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir, * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>469</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>470</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>471</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɺͲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Բ<EFBFBD>ȡ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>472</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>suser</span></u>())</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>473</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>474</span></u><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(filename,&namelen,&basename, <u><span
|
||
style='color:blue'>NULL</span></u>)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>475</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>476</span></u><span
|
||
lang=EN-US> if (!namelen) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>477</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>478</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>479</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>480</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>permission</span></u>(dir,<u><span style='color:blue'>MAY_WRITE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>481</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>482</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>483</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鲢<EFBFBD>Ż<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>484</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>485</span></u><span
|
||
lang=EN-US> if (bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>486</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>487</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>488</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EEXIST</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>489</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD>豸<EFBFBD>ļ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>豸<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i_zone[0]</span><EFBFBD>д<EFBFBD>ŵ<EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD>豸<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>š<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD>䡢<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>490</span></u><span
|
||
lang=EN-US> inode = <u><span
|
||
style='color:blue'>new_inode</span></u>(dir->i_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>491</span></u><span
|
||
lang=EN-US> if (!inode) {
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>492</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>493</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>494</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>495</span></u><span
|
||
lang=EN-US> inode->i_mode =
|
||
mode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>496</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>S_ISBLK</span></u>(mode) || <u><span style='color:blue'>S_ISCHR</span></u>(mode))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>497</span></u><span
|
||
lang=EN-US>
|
||
inode->i_zone[0] = dev;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>498</span></u><span
|
||
lang=EN-US> inode->i_mtime =
|
||
inode->i_atime = <u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>499</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<span lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>500</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>add_entry</span></u>(dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>501</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>502</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>503</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>504</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>505</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>506</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD>ɹ<EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ε<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0(</span><EFBFBD>ɹ<EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>507</span></u><span
|
||
lang=EN-US> de->inode =
|
||
inode->i_num;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>508</span></u><span
|
||
lang=EN-US> bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>509</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>510</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>511</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>512</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>513</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>514</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>pathname
|
||
- </span>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>mode - </span>Ŀ¼ʹ<EFBFBD>õ<EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>515</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>sys_mkdir</span></u>(const char *
|
||
pathname, int mode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>516</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>517</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>518</span></u><span
|
||
lang=EN-US> int namelen;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>519</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir, * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>520</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh, *dir_block;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>521</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>522</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Բ<EFBFBD>ȡ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ָ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>523</span></u><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(pathname,&namelen,&basename, <u><span
|
||
style='color:blue'>NULL</span></u>)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>524</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>525</span></u><span
|
||
lang=EN-US> if (!namelen) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>526</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>527</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>528</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>529</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>permission</span></u>(dir,<u><span style='color:blue'>MAY_WRITE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>530</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>531</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>532</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鲢<EFBFBD>Ż<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>32</span><EFBFBD>ֽ<EFBFBD> <20><><span lang=EN-US>2</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ĵ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>䡣<span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'.'</span><EFBFBD><EFBFBD><span lang=EN-US>'..'</span>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>533</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>534</span></u><span
|
||
lang=EN-US> if (bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>535</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>536</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>537</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EEXIST</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>538</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>539</span></u><span
|
||
lang=EN-US> inode = <u><span
|
||
style='color:blue'>new_inode</span></u>(dir->i_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>540</span></u><span
|
||
lang=EN-US> if (!inode) {
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>541</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>542</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>543</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>544</span></u><span
|
||
lang=EN-US> inode->i_size =
|
||
32;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>545</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>546</span></u><span
|
||
lang=EN-US> inode->i_mtime =
|
||
inode->i_atime = <u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ڱ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵĴ<EFBFBD><EFBFBD>̿飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ĵ<EFBFBD>һ<EFBFBD><EFBFBD>ֱ<EFBFBD>ӿ<EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڸÿ<EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żض<EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>µ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>пռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>547</span></u><span
|
||
lang=EN-US> if
|
||
(!(inode->i_zone[0]=<u><span style='color:blue'>new_block</span></u>(inode->i_dev)))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>548</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>549</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>550</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>551</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>552</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>553</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>̿飨Ŀ<EFBFBD><EFBFBD><EFBFBD>ǰѶ<EFBFBD>Ӧ<EFBFBD><EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żض<EFBFBD>Ӧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>̿飻<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><EFBFBD>µ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>û<EFBFBD>пռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>554</span></u><span
|
||
lang=EN-US> if (!(dir_block=<u><span
|
||
style='color:blue'>bread</span></u>(inode->i_dev,inode->i_zone[0]))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>555</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>556</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>557</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>558</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ERROR</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>559</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>н<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>ļ<EFBFBD><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD>Ĭ<EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><span lang=EN-US>'.'</span><EFBFBD><EFBFBD><span lang=EN-US>'..'</span><EFBFBD><EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ飬Ȼ<EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶε<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶε<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"."</span><EFBFBD><EFBFBD> Ȼ<><C8BB><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸýṹ<EFBFBD>д<EFBFBD><EFBFBD><EFBFBD>ϼ<EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ź<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>".."</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>øø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD>顣<EFBFBD>ٳ<EFBFBD>ʼ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ģʽ<EFBFBD>ֶΣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>560</span></u><span
|
||
lang=EN-US> de = (struct <u><span
|
||
style='color:blue'>dir_entry</span></u> *) dir_block->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>561</span></u><span
|
||
lang=EN-US>
|
||
de->inode=inode->i_num; //
|
||
</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'.'</span>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>562</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>strcpy</span></u>(de->name,<i>"."</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>563</span></u><span
|
||
lang=EN-US> de++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>564</span></u><span
|
||
lang=EN-US> de->inode =
|
||
dir->i_num;
|
||
// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>'..'</span>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>565</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>strcpy</span></u>(de->name,<i>".."</i>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>566</span></u><span
|
||
lang=EN-US> inode->i_nlinks
|
||
= 2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>567</span></u><span
|
||
lang=EN-US>
|
||
dir_block->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>568</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(dir_block);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>569</span></u><span
|
||
lang=EN-US> inode->i_mode = <u><span
|
||
style='color:blue'>I_DIRECTORY</span></u> | (mode & 0777 &
|
||
~current-><u><span style='color:blue'>umask</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>570</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>½<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>571</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>add_entry</span></u>(dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>572</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>573</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>574</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks=0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>575</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>576</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>577</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ֶε<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>578</span></u><span
|
||
lang=EN-US> de->inode =
|
||
inode->i_num;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>579</span></u><span
|
||
lang=EN-US> bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>580</span></u><span
|
||
lang=EN-US> dir->i_nlinks++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>581</span></u><span
|
||
lang=EN-US> dir->i_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>582</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>583</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>584</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>585</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>586</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>587</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>588</span></u><span
|
||
lang=EN-US> <b><i>/*</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>589</span></u><span
|
||
lang=EN-US> <b><i> * routine to check that the specified directory is
|
||
empty (for rmdir)</i></b></span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>590</span></u><span
|
||
lang=EN-US> <b><i> */</i></b></span></p>
|
||
|
||
<p class=a><span lang=EN-US> /*</span></p>
|
||
|
||
<p class=a><span lang=EN-US> * </span><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>Ƿ<EFBFBD>Ϊ<EFBFBD>յ<EFBFBD><EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>rmdir</span>ϵͳ<EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> */</span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD>Ƿ<EFBFBD>ա<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>inode
|
||
- </span>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD>롣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><span lang=EN-US>1 <20>C
|
||
</span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ǿյģ<EFBFBD><span lang=EN-US>0 - </span><EFBFBD><EFBFBD><EFBFBD>ա<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>591</span></u><span
|
||
lang=EN-US> static int <u><span style='color:blue'>empty_dir</span></u>(struct <u><span
|
||
style='color:blue'>m_inode</span></u> * inode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>592</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>593</span></u><span
|
||
lang=EN-US> int nr,block;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>594</span></u><span
|
||
lang=EN-US> int len;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>595</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>596</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>597</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>鿪ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>"."</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>".."</span><EFBFBD><EFBFBD> <20><><EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߸<EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ĵ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // 1</span><EFBFBD><EFBFBD>ֱ<EFBFBD>ӿ<EFBFBD>û<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>κδ<EFBFBD><EFBFBD>̿<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>߸<EFBFBD>ֱ<EFBFBD>ӿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>豸<span
|
||
lang=EN-US>dev </span><EFBFBD><EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0(</span>ʧ<EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>598</span></u><span
|
||
lang=EN-US> len =
|
||
inode->i_size / sizeof (struct <u><span style='color:blue'>dir_entry</span></u>);
|
||
// </span>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>599</span></u><span
|
||
lang=EN-US> if (len<2 ||
|
||
!inode->i_zone[0] ||</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>600</span></u><span
|
||
lang=EN-US>
|
||
!(bh=<u><span style='color:blue'>bread</span></u>(inode->i_dev,inode->i_zone[0])))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>601</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"warning - bad directory
|
||
on dev %04x\n"</i>,inode->i_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>602</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>603</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<span lang=EN-US>bh</span><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>к<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><span
|
||
lang=EN-US>"."</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><span
|
||
lang=EN-US>inode</span>Ӧ<EFBFBD>õ<EFBFBD><EFBFBD>ڵ<EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>2</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><span
|
||
lang=EN-US>".."</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><span
|
||
lang=EN-US> inode </span>Ӧ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD><span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD>Ϊ<EFBFBD>㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶβ<EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>"."</span><EFBFBD><EFBFBD><span lang=EN-US>".."</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD>豸<span
|
||
lang=EN-US>dev</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>604</span></u><span
|
||
lang=EN-US> de = (struct <u><span
|
||
style='color:blue'>dir_entry</span></u> *) bh->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>605</span></u><span
|
||
lang=EN-US> if (de[0].inode !=
|
||
inode->i_num || !de[1].inode || </span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>606</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>strcmp</span></u>(<i>"."</i>,de[0].name)
|
||
|| <u><span style='color:blue'>strcmp</span></u>(<i>".."</i>,de[1].name))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>607</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"warning - bad directory
|
||
on dev %04x\n"</i>,inode->i_dev);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>608</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>609</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>nr</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD>ʼ<EFBFBD>ƣ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еģ<EFBFBD><span
|
||
lang=EN-US>len - 2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶβ<EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>610</span></u><span
|
||
lang=EN-US> nr = 2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>611</span></u><span
|
||
lang=EN-US> de += 2;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>612</span></u><span
|
||
lang=EN-US> while (nr<len) {</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD>е<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD>ȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸô<EFBFBD><EFBFBD>̿<EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>麬<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>̿顣<EFBFBD><EFBFBD>ȡ<EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD>ݵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> nr </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ӦĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>ţ<EFBFBD><span
|
||
lang=EN-US>nr/DIR_ENTRIES_PER_BLOCK</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD><span lang=EN-US> bmap()</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>ö<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD><span
|
||
lang=EN-US> block</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ö<EFBFBD><EFBFBD>豸<EFBFBD>̿麯<EFBFBD><EFBFBD><span lang=EN-US>bread() </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>̿<EFBFBD><EFBFBD><EFBFBD>뻺<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ظû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>̿<EFBFBD>û<EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѿ<EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>613</span></u><span
|
||
lang=EN-US>
|
||
if ((void *) de >= (void *) (bh->b_data+<u><span style='color:blue'>BLOCK_SIZE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>614</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>615</span></u><span
|
||
lang=EN-US> block=<u><span
|
||
style='color:blue'>bmap</span></u>(inode,nr/<u><span style='color:blue'>DIR_ENTRIES_PER_BLOCK</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>616</span></u><span
|
||
lang=EN-US>
|
||
if (!block) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>617</span></u><span
|
||
lang=EN-US>
|
||
nr += <u><span style='color:blue'>DIR_ENTRIES_PER_BLOCK</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>618</span></u><span
|
||
lang=EN-US>
|
||
continue;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>619</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>620</span></u><span
|
||
lang=EN-US>
|
||
if (!(bh=<u><span style='color:blue'>bread</span></u>(inode->i_dev,block)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>621</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>622</span></u><span
|
||
lang=EN-US>
|
||
de = (struct <u><span style='color:blue'>dir_entry</span></u> *) bh->b_data;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>623</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD>ĵ<EFBFBD>ǰĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶβ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀǰ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>в<EFBFBD>ѯ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>nr</span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><span lang=EN-US>de</span>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>624</span></u><span
|
||
lang=EN-US>
|
||
if (de->inode) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>625</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>626</span></u><span
|
||
lang=EN-US>
|
||
return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>627</span></u><span
|
||
lang=EN-US>
|
||
}</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>628</span></u><span
|
||
lang=EN-US>
|
||
de++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>629</span></u><span
|
||
lang=EN-US>
|
||
nr++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>630</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ִ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>(</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>)</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŻ<EFBFBD><EFBFBD><EFBFBD>鷵<EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>631</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L632><u><span lang=EN-US style='color:blue'>632</span></u></a><span
|
||
lang=EN-US> return 1;</span></p>
|
||
|
||
<p class=a><a name=L633><u><span lang=EN-US style='color:blue'>633</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><a name=L634><u><span lang=EN-US style='color:blue'>634</span></u></a><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <span lang=EN-US>name
|
||
- </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD>ʾ<EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><a name=L635><u><span lang=EN-US style='color:blue'>635</span></u></a><span
|
||
lang=EN-US> int <u><span style='color:blue'>sys_rmdir</span></u>(const char *
|
||
name)</span></p>
|
||
|
||
<p class=a><a name=L636><u><span lang=EN-US style='color:blue'>636</span></u></a><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><a name=L637><u><span lang=EN-US style='color:blue'>637</span></u></a><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><a name=L638><u><span lang=EN-US style='color:blue'>638</span></u></a><span
|
||
lang=EN-US> int namelen;</span></p>
|
||
|
||
<p class=a><a name=L639><u><span lang=EN-US style='color:blue'>639</span></u></a><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir, * inode;</span></p>
|
||
|
||
<p class=a><a name=L640><u><span lang=EN-US style='color:blue'>640</span></u></a><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><a name=L641><u><span lang=EN-US style='color:blue'>641</span></u></a><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><a name=L642><u><span lang=EN-US style='color:blue'>642</span></u></a><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Բ<EFBFBD>ȡ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ָ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><a name=L643><u><span lang=EN-US style='color:blue'>643</span></u></a><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(name,&namelen,&basename, <u><span
|
||
style='color:blue'>NULL</span></u>)))</span></p>
|
||
|
||
<p class=a><a name=L644><u><span lang=EN-US style='color:blue'>644</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L645><u><span lang=EN-US style='color:blue'>645</span></u></a><span
|
||
lang=EN-US> if (!namelen) {</span></p>
|
||
|
||
<p class=a><a name=L646><u><span lang=EN-US style='color:blue'>646</span></u></a><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L647><u><span lang=EN-US style='color:blue'>647</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L648><u><span lang=EN-US style='color:blue'>648</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><a name=L649><u><span lang=EN-US style='color:blue'>649</span></u></a><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>permission</span></u>(dir,<u><span style='color:blue'>MAY_WRITE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><a name=L650><u><span lang=EN-US style='color:blue'>650</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L651><u><span lang=EN-US style='color:blue'>651</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L652><u><span lang=EN-US style='color:blue'>652</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>find_entry()</span>Ѱ<EFBFBD>Ҷ<EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ذ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span><EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>de
|
||
</span><EFBFBD>е<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> iget()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US> inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ͷź<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><a name=L653><u><span lang=EN-US style='color:blue'>653</span></u></a><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><a name=L654><u><span lang=EN-US style='color:blue'>654</span></u></a><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><a name=L655><u><span lang=EN-US style='color:blue'>655</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L656><u><span lang=EN-US style='color:blue'>656</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L657><u><span lang=EN-US style='color:blue'>657</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><a name=L658><u><span lang=EN-US style='color:blue'>658</span></u></a><span
|
||
lang=EN-US> if (!(inode = <u><span
|
||
style='color:blue'>iget</span></u>(dir->i_dev, de->inode))) {</span></p>
|
||
|
||
<p class=a><a name=L659><u><span lang=EN-US style='color:blue'>659</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L660><u><span lang=EN-US style='color:blue'>660</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L661><u><span lang=EN-US style='color:blue'>661</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L662><u><span lang=EN-US style='color:blue'>662</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>а<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span
|
||
lang=EN-US>inode</span><EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>3</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ҽ<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD><span lang=EN-US>euid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>root</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҽ<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>û<EFBFBD><span lang=EN-US>id</span><EFBFBD><EFBFBD><span
|
||
lang=EN-US>euid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span lang=EN-US>id</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ذ<EFBFBD><EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼ <span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ㣬Ȼ<EFBFBD><EFBFBD><EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><a name=L663><u><span lang=EN-US style='color:blue'>663</span></u></a><span
|
||
lang=EN-US> if ((dir->i_mode
|
||
& <u><span style='color:blue'>S_ISVTX</span></u>) && <u><span
|
||
style='color:blue'>current</span></u>->euid &&</span></p>
|
||
|
||
<p class=a><a name=L664><u><span lang=EN-US style='color:blue'>664</span></u></a><span
|
||
lang=EN-US>
|
||
inode->i_uid != <u><span style='color:blue'>current</span></u>->euid) {</span></p>
|
||
|
||
<p class=a><a name=L665><u><span lang=EN-US style='color:blue'>665</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L666><u><span lang=EN-US style='color:blue'>666</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><a name=L667><u><span lang=EN-US style='color:blue'>667</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L668><u><span lang=EN-US style='color:blue'>668</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L669><u><span lang=EN-US style='color:blue'>669</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>Ų<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>߸ñ<EFBFBD>ɾ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> 1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>з<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD>Ҫɾ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><a name=L670><u><span lang=EN-US style='color:blue'>670</span></u></a><span
|
||
lang=EN-US> if (inode->i_dev
|
||
!= dir->i_dev || inode->i_count>1) {</span></p>
|
||
|
||
<p class=a><a name=L671><u><span lang=EN-US style='color:blue'>671</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L672><u><span lang=EN-US style='color:blue'>672</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><a name=L673><u><span lang=EN-US style='color:blue'>673</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L674><u><span lang=EN-US style='color:blue'>674</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L675><u><span lang=EN-US style='color:blue'>675</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>͵<EFBFBD><EFBFBD>ڰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ͼɾ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // "."</span>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ġ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǷŻذ<EFBFBD><EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><a name=L676><u><span lang=EN-US style='color:blue'>676</span></u></a><span
|
||
lang=EN-US> if (inode == dir)
|
||
{ <b><i>/* we may not delete ".", but
|
||
"../dir" is ok */</i></b></span></p>
|
||
|
||
<p class=a><a name=L677><u><span lang=EN-US style='color:blue'>677</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><a name=L678><u><span lang=EN-US style='color:blue'>678</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L679><u><span lang=EN-US style='color:blue'>679</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L680><u><span lang=EN-US style='color:blue'>680</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L681><u><span lang=EN-US style='color:blue'>681</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⲻ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Żذ<EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><a name=L682><u><span lang=EN-US style='color:blue'>682</span></u></a><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>S_ISDIR</span></u>(inode->i_mode)) {</span></p>
|
||
|
||
<p class=a><a name=L683><u><span lang=EN-US style='color:blue'>683</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><a name=L684><u><span lang=EN-US style='color:blue'>684</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L685><u><span lang=EN-US style='color:blue'>685</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L686><u><span lang=EN-US style='color:blue'>686</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOTDIR</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L687><u><span lang=EN-US style='color:blue'>687</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豻ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>գ<EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǷŻذ<EFBFBD><EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><a name=L688><u><span lang=EN-US style='color:blue'>688</span></u></a><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>empty_dir</span></u>(inode)) {</span></p>
|
||
|
||
<p class=a><a name=L689><u><span lang=EN-US style='color:blue'>689</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><a name=L690><u><span lang=EN-US style='color:blue'>690</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L691><u><span lang=EN-US style='color:blue'>691</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L692><u><span lang=EN-US style='color:blue'>692</span></u></a><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOTEMPTY</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L693><u><span lang=EN-US style='color:blue'>693</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӵ<EFBFBD><EFBFBD>ϲ<EFBFBD>Ŀ¼<EFBFBD>ͱ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豻ɾ<EFBFBD><EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>2</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>豻</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD>и<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD>顣Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><a name=L694><u><span lang=EN-US style='color:blue'>694</span></u></a><span
|
||
lang=EN-US> if
|
||
(inode->i_nlinks != 2)</span></p>
|
||
|
||
<p class=a><a name=L695><u><span lang=EN-US style='color:blue'>695</span></u></a><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>printk</span></u>(<i>"empty directory has
|
||
nlink!=2 (%d)"</i>,inode->i_nlinks);</span></p>
|
||
|
||
<p class=a><a name=L696><u><span lang=EN-US style='color:blue'>696</span></u></a><span
|
||
lang=EN-US> de->inode = 0;</span></p>
|
||
|
||
<p class=a><a name=L697><u><span lang=EN-US style='color:blue'>697</span></u></a><span
|
||
lang=EN-US> bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><a name=L698><u><span lang=EN-US style='color:blue'>698</span></u></a><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><a name=L699><u><span lang=EN-US style='color:blue'>699</span></u></a><span
|
||
lang=EN-US>
|
||
inode->i_nlinks=0;</span></p>
|
||
|
||
<p class=a><a name=L700><u><span lang=EN-US style='color:blue'>700</span></u></a><span
|
||
lang=EN-US> inode->i_dirt=1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD>øýڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żذ<EFBFBD><EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><a name=L701><u><span lang=EN-US style='color:blue'>701</span></u></a><span
|
||
lang=EN-US> dir->i_nlinks--;</span></p>
|
||
|
||
<p class=a><a name=L702><u><span lang=EN-US style='color:blue'>702</span></u></a><span
|
||
lang=EN-US> dir->i_ctime =
|
||
dir->i_mtime = <u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><a name=L703><u><span lang=EN-US style='color:blue'>703</span></u></a><span
|
||
lang=EN-US> dir->i_dirt=1;</span></p>
|
||
|
||
<p class=a><a name=L704><u><span lang=EN-US style='color:blue'>704</span></u></a><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><a name=L705><u><span lang=EN-US style='color:blue'>705</span></u></a><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><a name=L706><u><span lang=EN-US style='color:blue'>706</span></u></a><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><a name=L707><u><span lang=EN-US style='color:blue'>707</span></u></a><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><a name=L708><u><span lang=EN-US style='color:blue'>708</span></u></a><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷţ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ϵͳɾ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֡<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>н<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ļ<EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD>豸<EFBFBD>ռ䡣</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>name
|
||
- </span><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><a name=L709><u><span lang=EN-US style='color:blue'>709</span></u></a><span
|
||
lang=EN-US> int <u><span style='color:blue'>sys_unlink</span></u>(const char *
|
||
name)</span></p>
|
||
|
||
<p class=a><a name=L710><u><span lang=EN-US style='color:blue'>710</span></u></a><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><a name=L711><u><span lang=EN-US style='color:blue'>711</span></u></a><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>712</span></u><span
|
||
lang=EN-US> int namelen;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>713</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir, * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>714</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>715</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>716</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>Բ<EFBFBD>ȡ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ָ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>717</span></u><span
|
||
lang=EN-US> if (!(dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(name,&namelen,&basename, <u><span
|
||
style='color:blue'>NULL</span></u>)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>718</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>719</span></u><span
|
||
lang=EN-US> if (!namelen) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>720</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>721</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>722</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>723</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>permission</span></u>(dir,<u><span style='color:blue'>MAY_WRITE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>724</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>725</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>726</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ú<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>find_entry()</span>Ѱ<EFBFBD>Ҷ<EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ذ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>bh</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ָ<EFBFBD><EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span><EFBFBD><EFBFBD><EFBFBD>ٸ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>de
|
||
</span><EFBFBD>е<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US> iget()</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US> inode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>
|
||
<span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡĿ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD> <span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>ͷź<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>727</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>728</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>729</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>730</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>731</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>732</span></u><span
|
||
lang=EN-US> if (!(inode = <u><span
|
||
style='color:blue'>iget</span></u>(dir->i_dev, de->inode))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>733</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>734</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>735</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>736</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>а<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span
|
||
lang=EN-US>inode</span><EFBFBD><EFBFBD>Ҫ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>de</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>3</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ҽ<EFBFBD><EFBFBD>̵<EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD><span lang=EN-US>euid</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>root</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҽ<EFBFBD><EFBFBD>̵<EFBFBD><span
|
||
lang=EN-US>euid</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڸ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҽ<EFBFBD><EFBFBD>̵<EFBFBD><span lang=EN-US>euid</span>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><span
|
||
lang=EN-US>id</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǷŻذ<EFBFBD><EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ҫɾ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>737</span></u><span
|
||
lang=EN-US> if ((dir->i_mode
|
||
& <u><span style='color:blue'>S_ISVTX</span></u>) && !<u><span
|
||
style='color:blue'>suser</span></u>() &&</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>738</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>current</span></u>->euid != inode->i_uid
|
||
&&</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>739</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>current</span></u>->euid != dir->i_uid) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>740</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>741</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>742</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>743</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>744</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>㣬<EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>745</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>S_ISDIR</span></u>(inode->i_mode)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>746</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>747</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>748</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>749</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>750</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD>Ѿ<EFBFBD>Ϊ<span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>1</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>751</span></u><span
|
||
lang=EN-US> if
|
||
(!inode->i_nlinks) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>752</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>printk</span></u>(<i>"Deleting nonexistent file
|
||
(%04x:%d), %d\n"</i>,</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>753</span></u><span
|
||
lang=EN-US>
|
||
inode->i_dev,inode->i_num,inode->i_nlinks);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>754</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks=1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>755</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ʾ<EFBFBD>ͷŸ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ð<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ͷŸø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>顣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>756</span></u><span
|
||
lang=EN-US> de->inode = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>757</span></u><span
|
||
lang=EN-US> bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>758</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>¸ı<EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ظ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҵ<EFBFBD>ʱû<EFBFBD>н<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>iput()</span><EFBFBD>Ż<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD>õ<EFBFBD><EFBFBD>豸<EFBFBD>ռ䡣<EFBFBD>μ<EFBFBD><span
|
||
lang=EN-US>fs/inode.c</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>183</span><EFBFBD>С<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>759</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>760</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>761</span></u><span
|
||
lang=EN-US> inode->i_ctime =
|
||
<u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>762</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>763</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>764</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>765</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>766</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊһ<EFBFBD><EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>Ҳ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> - hard link</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>oldname
|
||
- </span>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>newname - </span><EFBFBD>µ<EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>767</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>sys_symlink</span></u>(const char *
|
||
oldname, const char * newname)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>768</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>769</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>770</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * dir, * inode;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>771</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh, * name_block;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>772</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>773</span></u><span
|
||
lang=EN-US> int namelen, i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>774</span></u><span
|
||
lang=EN-US> char c;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>775</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Ȳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䳤<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // i</span><EFBFBD>ڵ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ܽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>776</span></u><span
|
||
lang=EN-US> dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(newname,&namelen,&basename, <u><span
|
||
style='color:blue'>NULL</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>777</span></u><span
|
||
lang=EN-US> if (!dir)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>778</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>779</span></u><span
|
||
lang=EN-US> if (!namelen) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>780</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>781</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>782</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>783</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>permission</span></u>(dir,<u><span style='color:blue'>MAY_WRITE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>784</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>785</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>786</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼ָ<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ģʽΪ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>̹涨<EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>787</span></u><span
|
||
lang=EN-US> if (!(inode = <u><span
|
||
style='color:blue'>new_inode</span></u>(dir->i_dev))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>788</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>789</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>790</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>791</span></u><span
|
||
lang=EN-US> inode->i_mode = <u><span
|
||
style='color:blue'>S_IFLNK</span></u> | (0777 & ~current-><u><span
|
||
style='color:blue'>umask</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>792</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊ<EFBFBD>˱<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ҪΪ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̿飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>1</span><EFBFBD><EFBFBD>ֱ<EFBFBD>ӿ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i_zone[0]</span><EFBFBD><EFBFBD><EFBFBD>ڵõ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Żض<EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>п<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>793</span></u><span
|
||
lang=EN-US> if
|
||
(!(inode->i_zone[0]=<u><span style='color:blue'>new_block</span></u>(inode->i_dev)))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>794</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>795</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>796</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>797</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>798</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>799</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD>϶<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>̿飨Ŀ<EFBFBD><EFBFBD><EFBFBD>ǰѶ<EFBFBD>Ӧ<EFBFBD><EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>ӦĿ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><EFBFBD>µ<EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>пռ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>800</span></u><span
|
||
lang=EN-US> if (!(name_block=<u><span
|
||
style='color:blue'>bread</span></u>(inode->i_dev,inode->i_zone[0]))) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>801</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>802</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>803</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>804</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ERROR</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>805</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD>ѷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD>̿鳤<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>1024</span><EFBFBD>ֽڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD>Ϸ<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1024</span><EFBFBD>ֽڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ռ<EFBFBD><EFBFBD>еķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD>̿<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ֹ<EFBFBD>û<EFBFBD><EFBFBD>ṩ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>null</span><EFBFBD><EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڻ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ֽڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD>Ȼ<EFBFBD><EFBFBD><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>Ӧ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ݳ<EFBFBD><EFBFBD>ȵ<EFBFBD><EFBFBD>ڷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>806</span></u><span
|
||
lang=EN-US> i = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>807</span></u><span
|
||
lang=EN-US> while (i < 1023
|
||
&& (c=<u><span style='color:blue'>get_fs_byte</span></u>(oldname++)))</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>808</span></u><span
|
||
lang=EN-US>
|
||
name_block->b_data[i++] = c;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>809</span></u><span
|
||
lang=EN-US>
|
||
name_block->b_data[i] = 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>810</span></u><span
|
||
lang=EN-US>
|
||
name_block->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>811</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(name_block);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>812</span></u><span
|
||
lang=EN-US> inode->i_size =
|
||
i;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>813</span></u><span
|
||
lang=EN-US> inode->i_dirt =
|
||
1;</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܴ<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD><EFBFBD>λ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>814</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>815</span></u><span
|
||
lang=EN-US> if (bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>816</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>817</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>818</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>819</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>820</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EEXIST</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>821</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ź<EFBFBD>Ŀ¼</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Ϊ<span
|
||
lang=EN-US>NULL</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>822</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>add_entry</span></u>(dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>823</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>824</span></u><span
|
||
lang=EN-US>
|
||
inode->i_nlinks--;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>825</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>826</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>827</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>828</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ֶε<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ͷŸ<EFBFBD><EFBFBD>ٻ<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>飬<EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>829</span></u><span
|
||
lang=EN-US> de->inode =
|
||
inode->i_num;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>830</span></u><span
|
||
lang=EN-US> bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>831</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>832</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>833</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(inode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>834</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>835</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>836</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> //// </span>Ϊ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ϊһ<EFBFBD><EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD>Ҳ<EFBFBD><EFBFBD>ΪӲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US> - hard link</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>oldname
|
||
- </span>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>newname - </span><EFBFBD>µ<EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>837</span></u><span
|
||
lang=EN-US> int <u><span style='color:blue'>sys_link</span></u>(const char *
|
||
oldname, const char * newname)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>838</span></u><span
|
||
lang=EN-US> {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>839</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>dir_entry</span></u> * de;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>840</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>m_inode</span></u> * oldinode, * dir;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>841</span></u><span
|
||
lang=EN-US> struct <u><span
|
||
style='color:blue'>buffer_head</span></u> * bh;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>842</span></u><span
|
||
lang=EN-US> const char *
|
||
basename;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>843</span></u><span
|
||
lang=EN-US> int namelen;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>844</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ȶ<EFBFBD>ԭ<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD>ô<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡԭ<EFBFBD>ļ<EFBFBD>·</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span
|
||
lang=EN-US>oldinode</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬Ҳ<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>845</span></u><span
|
||
lang=EN-US> oldinode=<u><span
|
||
style='color:blue'>namei</span></u>(oldname);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>846</span></u><span
|
||
lang=EN-US> if (!oldinode)</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>847</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOENT</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>848</span></u><span
|
||
lang=EN-US> if (<u><span
|
||
style='color:blue'>S_ISDIR</span></u>(oldinode->i_mode)) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>849</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>850</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>851</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>Ȼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><span lang=EN-US>dir</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䳤<EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // i</span><EFBFBD>ڵ<EFBFBD>û<EFBFBD><EFBFBD><EFBFBD>ҵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>Ż<EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>852</span></u><span
|
||
lang=EN-US> dir = <u><span
|
||
style='color:blue'>dir_namei</span></u>(newname,&namelen,&basename, <u><span
|
||
style='color:blue'>NULL</span></u>);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>853</span></u><span
|
||
lang=EN-US> if (!dir) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>854</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>855</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>856</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>857</span></u><span
|
||
lang=EN-US> if (!namelen) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>858</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>859</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>860</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EPERM</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>861</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><EFBFBD>ܿ<EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӳ<EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>豸<EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD>⣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>û<EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ȩ<EFBFBD>ޣ<EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ܽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǷŻ<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>862</span></u><span
|
||
lang=EN-US> if (dir->i_dev
|
||
!= oldinode->i_dev) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>863</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>864</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>865</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EXDEV</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>866</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>867</span></u><span
|
||
lang=EN-US> if (!<u><span
|
||
style='color:blue'>permission</span></u>(dir,<u><span style='color:blue'>MAY_WRITE</span></u>))
|
||
{</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>868</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>869</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>870</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EACCES</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>871</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD>ѯ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ܽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷŰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ѵ<EFBFBD><EFBFBD><EFBFBD>Ŀ</p>
|
||
|
||
<p class=a><span lang=EN-US> // </span>¼<EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>ٻ<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD>Ż<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>872</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>find_entry</span></u>(&dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>873</span></u><span
|
||
lang=EN-US> if (bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>874</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>875</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>876</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>877</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>EEXIST</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>878</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Żظ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD><EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD>š<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD>ŵ<EFBFBD><EFBFBD><EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ڵ<EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ð<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD>ͷŸû<EFBFBD><EFBFBD><EFBFBD>飬<EFBFBD>Ż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㡣</p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>879</span></u><span
|
||
lang=EN-US> bh = <u><span
|
||
style='color:blue'>add_entry</span></u>(dir,basename,namelen,&de);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>880</span></u><span
|
||
lang=EN-US> if (!bh) {</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>881</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>882</span></u><span
|
||
lang=EN-US>
|
||
<u><span style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>883</span></u><span
|
||
lang=EN-US>
|
||
return -<u><span style='color:blue'>ENOSPC</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>884</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>885</span></u><span
|
||
lang=EN-US> de->inode =
|
||
oldinode->i_num;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>886</span></u><span
|
||
lang=EN-US> bh->b_dirt = 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>887</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>brelse</span></u>(bh);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>888</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(dir);</span></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>ٽ<EFBFBD>ԭ<EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>1</span><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>ǰʱ<EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>i</span><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ı<EFBFBD>־<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><span lang=EN-US> // </span><EFBFBD>Ż<EFBFBD>ԭ·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span
|
||
lang=EN-US>i</span><EFBFBD>ڵ㣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><span lang=EN-US>0</span><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>889</span></u><span
|
||
lang=EN-US>
|
||
oldinode->i_nlinks++;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>890</span></u><span
|
||
lang=EN-US>
|
||
oldinode->i_ctime = <u><span style='color:blue'>CURRENT_TIME</span></u>;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>891</span></u><span
|
||
lang=EN-US> oldinode->i_dirt
|
||
= 1;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>892</span></u><span
|
||
lang=EN-US> <u><span
|
||
style='color:blue'>iput</span></u>(oldinode);</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>893</span></u><span
|
||
lang=EN-US> return 0;</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>894</span></u><span
|
||
lang=EN-US> }</span></p>
|
||
|
||
<p class=a><u><span lang=EN-US style='color:blue'>895</span></u><span
|
||
lang=EN-US> </span></p>
|
||
|
||
<div class=a align=center style='text-align:center'><span lang=EN-US>
|
||
|
||
<hr size=4 width="100%" align=center>
|
||
|
||
</span></div>
|
||
|
||
<p class=MsoNormal><span lang=EN-US> </span></p>
|
||
|
||
<p class=MsoNormal><span lang=EN-US> </span></p>
|
||
|
||
</div>
|
||
|
||
</body>
|
||
|
||
</html>
|