126 lines
3.7 KiB
HTML
126 lines
3.7 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>strdup</title>
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="strdup"></a> <a name="tag_03_726"></a><!-- strdup -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_726_01"></a>NAME</h4>
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<blockquote>strdup - duplicate a string</blockquote>
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<h4><a name="tag_03_726_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <<a href="../basedefs/string.h.html">string.h</a>><br>
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<br>
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char *strdup(const char *</tt><i>s1</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
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<tt><br>
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</tt></blockquote>
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<h4><a name="tag_03_726_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>strdup</i>() function shall return a pointer to a new string, which is a duplicate of the string pointed to by <i>s1</i>.
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The returned pointer can be passed to <a href="../functions/free.html"><i>free</i>()</a>. A null pointer is returned if the new
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string cannot be created.</p>
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</blockquote>
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<h4><a name="tag_03_726_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The <i>strdup</i>() function shall return a pointer to a new string on success. Otherwise, it shall return a null pointer and
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set <i>errno</i> to indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_726_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>strdup</i>() function may fail if:</p>
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<dl compact>
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<dt>[ENOMEM]</dt>
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<dd>Storage space available is insufficient.</dd>
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</dl>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_726_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_726_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_726_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_726_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_726_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="free.html"><i>free</i>()</a> , <a href="malloc.html"><i>malloc</i>()</a> , the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/string.h.html"><i><string.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_726_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4, Version 2.</p>
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</blockquote>
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<h4><a name="tag_03_726_12"></a>Issue 5</h4>
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<blockquote>
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<p>Moved from X/OPEN UNIX extension to BASE.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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<center><font size="2"><!--footer start-->
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
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"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
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