214 lines
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214 lines
14 KiB
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<TITLE>Int 21/AH=71h
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<META NAME="Description" CONTENT="
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Int 21/AH=71h - Windows95 - LONG FILENAME FUNCTIONS -
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AH = 71h
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AL = function
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0Dh reset drive (see AX=710Dh)
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39h create directory (see AX=7139h)
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3Ah remove directory (see AX=713Ah)
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3Bh set current directory (see AX=713Bh)
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41h delete file (see AX=7141h)
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43h get/set file attributes (see AX=7143h)
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47h get current directory (see AX=7147h)
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4Eh find first file (see AX=714Eh)
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">
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<h2>Int 21/AH=71h
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>Windows95 - LONG FILENAME FUNCTIONS</font></h3>
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<PRE>
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AH = 71h
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AL = function
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0Dh reset drive (see AX=710Dh)
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39h create directory (see AX=7139h)
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3Ah remove directory (see AX=713Ah)
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3Bh set current directory (see AX=713Bh)
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41h delete file (see AX=7141h)
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43h get/set file attributes (see AX=7143h)
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47h get current directory (see AX=7147h)
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4Eh find first file (see AX=714Eh)
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4Fh find next file (see AX=714Fh)
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56h move (rename) file (see AX=7156h)
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60h truename (see AX=7160h/CL=00h,AX=7160h/CL=02h)
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6Ch create/open file (see AX=716Ch)
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A0h get volume information (see AX=71A0h)
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A1h terminate FindFirst/FindNext (see AX=71A1h)
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A6h get file information (see AX=71A6h)
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A7h time conversion (see AX=71A7h/BL=00h,AX=71A7h/BL=01h)
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A8h generate short filename (see AX=71A8h)
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A9h server create/open file (see AX=71A9h)
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AAh create/terminate SUBST (see AX=71AAh/BH=00h,AX=71AAh/BH=02h)<br>
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<p><b>Return:</b><br>CF set on error
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AX = error code <a href="rb-3012.htm#Table1680" tppabs="http://www.ctyme.com/intr/rb-3012.htm#Table1680">(see #01680)</a>
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7100h if function not supported
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CF clear if successful
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other registers as for corresponding "old" DOS function
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</PRE>
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<p><b>Notes:</b>
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If error 7100h is returned, the old-style function should be called.
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AX=714Eh returns a "search handle" which must be passed to AX=714Fh;
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when the search is complete, AX=71A1h must be called to terminate
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the search.
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For compatibility with DOS versions prior to v7.00, the carry flag
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should be set on call to ensure that it is set on exit.
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Caldera's DPMS-enabled LONGNAME.EXE BETA 1 extension for DR-DOS 7
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<PRE>
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<p><b>supports the following sub-set of LFN functions:</b><br>39h, 3Ah, 3Bh, 41h,
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43h (BL = 0, 1 only), 47h, 4Eh, 4Fh, 56h, 60h (CL = 0, 1, 2), 6Ch,
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A0h, A1h, A8h. BETA 2 fixes LFN directory entry checksums, which
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were causing wrong LFNs to be attached to a file. The 8.3 short
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names for filenames with exactly 8 chars are no longer abbreviated
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(e.g. LONGNAME.TXT -> LONGNAME.TXT, not LONGNA~1.TXT). BETA 3 has
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A7h (BL=0, 1) functions added, and 4Eh/4Fh can return file times
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in both DOS and 64 bit formats, BETA 4 has support added for
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Caldera's DRFAT32 redirector extension (see INT 2F/AX=15xxh)..
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Caldera's DR-OpenDOS 7.02+ COMMAND.COM utilizes the LFN API as soon
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as it detects it (mind, that LONGNAME.EXE can be dynamically loaded
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and unloaded at runtime). This COMMAND.COM shell also works under
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MS-DOS/PC DOS and in DOS boxes of Windows9x, NT, 2000, and OS/2..
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For 4DOS 6.02+ to work with 3rd party LFN providers, the Win95LFN=Yes
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directive should be inserted into the 4DOS.INI file..
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Mike Podanoffsky's RxDOS 7.2 provides most of this API natively,
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including functions 39h, 3Ah, 3Bh, 41h, 43h (BL = ???), 47h, 4Bh,
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4Eh, 4Fh, 56h, 60h (CL = 0, 1, 2, no CH), 6Ch, A0h, A1h and A7h.
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However, not all sub-functions seem to be supported yet.
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</PRE>
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<p><b>See Also:</b>
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<a href="rb-2775.htm" tppabs="http://www.ctyme.com/intr/rb-2775.htm">AH=39h</a> - <a href="rb-2776.htm" tppabs="http://www.ctyme.com/intr/rb-2776.htm">AH=3Ah</a> - <a href="rb-2777.htm" tppabs="http://www.ctyme.com/intr/rb-2777.htm">AH=3Bh</a> - <a href="rb-2797.htm" tppabs="http://www.ctyme.com/intr/rb-2797.htm">AH=41h</a> - <a href
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"javascript:if(confirm('http://www.ctyme.com/intr/<p \n\nThis file was not retrieved by Teleport Pro, because the server reports that this file cannot be found. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/<p'" tppabs="http://www.ctyme.com/intr/<p"><b>See Also:</b>
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<a href="rb-2810.htm" tppabs="http://www.ctyme.com/intr/rb-2810.htm">AX=4307h</a> - <a href="rb-2933.htm" tppabs="http://www.ctyme.com/intr/rb-2933.htm">AH=47h</a> - <a href="rb-2977.htm" tppabs="http://www.ctyme.com/intr/rb-2977.htm">AH=4Eh</a> - <a href="rb-2979.htm" tppabs="http://www.ctyme.com/intr/rb-2979.htm">AH=4Fh</a> - <a hr
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<p>
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<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
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DOS Kernel</a>
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- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
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Int 21h</a>
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W</a>
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