218 lines
6.0 KiB
HTML
218 lines
6.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
|
<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
|
|
<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
|
|
<title>basename</title>
|
|
</head>
|
|
<body bgcolor="white">
|
|
<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
|
|
</script>
|
|
|
|
<basefont size="3"> <a name="basename"></a> <a name="tag_03_36"></a><!-- basename -->
|
|
<!--header start-->
|
|
<center><font size="2">The Open Group Base Specifications Issue 6<br>
|
|
IEEE Std 1003.1-2001<br>
|
|
Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
|
|
|
|
<!--header end-->
|
|
<hr size="2" noshade>
|
|
<h4><a name="tag_03_36_01"></a>NAME</h4>
|
|
|
|
<blockquote>basename - return the last component of a pathname</blockquote>
|
|
|
|
<h4><a name="tag_03_36_02"></a>SYNOPSIS</h4>
|
|
|
|
<blockquote class="synopsis">
|
|
<div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
|
|
"[Option Start]" border="0"> #include <<a href="../basedefs/libgen.h.html">libgen.h</a>><br>
|
|
<br>
|
|
char *basename(char *</tt><i>path</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
|
|
|
|
<tt><br>
|
|
</tt></blockquote>
|
|
|
|
<h4><a name="tag_03_36_03"></a>DESCRIPTION</h4>
|
|
|
|
<blockquote>
|
|
<p>The <i>basename</i>() function shall take the pathname pointed to by <i>path</i> and return a pointer to the final component of
|
|
the pathname, deleting any trailing <tt>'/'</tt> characters.</p>
|
|
|
|
<p>If the string consists entirely of the <tt>'/'</tt> character, <i>basename</i>() shall return a pointer to the string
|
|
<tt>"/"</tt> . If the string is exactly <tt>"//"</tt> , it is implementation-defined whether <tt>'/'</tt> or <tt>"//"</tt> is
|
|
returned.</p>
|
|
|
|
<p>If <i>path</i> is a null pointer or points to an empty string, <i>basename</i>() shall return a pointer to the string
|
|
<tt>"."</tt> .</p>
|
|
|
|
<p>The <i>basename</i>() function may modify the string pointed to by <i>path</i>, and may return a pointer to static storage that
|
|
may then be overwritten by a subsequent call to <i>basename</i>().</p>
|
|
|
|
<p>The <i>basename</i>() function need not be reentrant. A function that is not required to be reentrant is not required to be
|
|
thread-safe.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_04"></a>RETURN VALUE</h4>
|
|
|
|
<blockquote>
|
|
<p>The <i>basename</i>() function shall return a pointer to the final component of <i>path</i>.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_05"></a>ERRORS</h4>
|
|
|
|
<blockquote>
|
|
<p>No errors are defined.</p>
|
|
</blockquote>
|
|
|
|
<hr>
|
|
<div class="box"><em>The following sections are informative.</em></div>
|
|
|
|
<h4><a name="tag_03_36_06"></a>EXAMPLES</h4>
|
|
|
|
<blockquote>
|
|
<h5><a name="tag_03_36_06_01"></a>Using basename()</h5>
|
|
|
|
<p>The following program fragment returns a pointer to the value <i>lib</i>, which is the base name of <b>/usr/lib</b>.</p>
|
|
|
|
<pre>
|
|
<tt>#include <libgen.h>
|
|
...
|
|
char *name = "/usr/lib";
|
|
char *base;
|
|
<br>
|
|
base = basename(name);
|
|
...
|
|
</tt>
|
|
</pre>
|
|
|
|
<h5><a name="tag_03_36_06_02"></a>Sample Input and Output Strings for basename()</h5>
|
|
|
|
<p>In the following table, the input string is the value pointed to by <i>path</i>, and the output string is the return value of
|
|
the <i>basename</i>() function.</p>
|
|
|
|
<center>
|
|
<table border="1" cellpadding="3" align="center">
|
|
<tr valign="top">
|
|
<th align="center">
|
|
<p class="tent"><b>Input String</b></p>
|
|
</th>
|
|
<th align="center">
|
|
<p class="tent"><b>Output String</b></p>
|
|
</th>
|
|
</tr>
|
|
|
|
<tr valign="top">
|
|
<td align="left">
|
|
<p class="tent">"/usr/lib"</p>
|
|
</td>
|
|
<td align="left">
|
|
<p class="tent">"lib"</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr valign="top">
|
|
<td align="left">
|
|
<p class="tent">"/usr/"</p>
|
|
</td>
|
|
<td align="left">
|
|
<p class="tent">"usr"</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr valign="top">
|
|
<td align="left">
|
|
<p class="tent">"/"</p>
|
|
</td>
|
|
<td align="left">
|
|
<p class="tent">"/"</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr valign="top">
|
|
<td align="left">
|
|
<p class="tent">"///"</p>
|
|
</td>
|
|
<td align="left">
|
|
<p class="tent">"/"</p>
|
|
</td>
|
|
</tr>
|
|
|
|
<tr valign="top">
|
|
<td align="left">
|
|
<p class="tent">"//usr//lib//"</p>
|
|
</td>
|
|
<td align="left">
|
|
<p class="tent">"lib"</p>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</center>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_07"></a>APPLICATION USAGE</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_08"></a>RATIONALE</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_09"></a>FUTURE DIRECTIONS</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_10"></a>SEE ALSO</h4>
|
|
|
|
<blockquote>
|
|
<p><a href="dirname.html"><i>dirname</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
|
|
"../basedefs/libgen.h.html"><i><libgen.h></i></a>, the Shell and Utilities volume of IEEE Std 1003.1-2001, <a href=
|
|
"../utilities/basename.html"><i>basename</i></a></p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_11"></a>CHANGE HISTORY</h4>
|
|
|
|
<blockquote>
|
|
<p>First released in Issue 4, Version 2.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_12"></a>Issue 5</h4>
|
|
|
|
<blockquote>
|
|
<p>Moved from X/OPEN UNIX extension to BASE.</p>
|
|
|
|
<p>Normative text previously in the APPLICATION USAGE section is moved to the DESCRIPTION.</p>
|
|
|
|
<p>A note indicating that this function need not be reentrant is added to the DESCRIPTION.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_36_13"></a>Issue 6</h4>
|
|
|
|
<blockquote>
|
|
<p>In the DESCRIPTION, the note about reentrancy is expanded to cover thread-safety.</p>
|
|
</blockquote>
|
|
|
|
<div class="box"><em>End of informative text.</em></div>
|
|
|
|
<hr>
|
|
<hr size="2" noshade>
|
|
<center><font size="2"><!--footer start-->
|
|
UNIX ® is a registered Trademark of The Open Group.<br>
|
|
POSIX ® is a registered Trademark of The IEEE.<br>
|
|
[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
|
|
"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
|
|
]</font></center>
|
|
|
|
<!--footer end-->
|
|
<hr size="2" noshade>
|
|
</body>
|
|
</html>
|
|
|