144 lines
4.7 KiB
HTML
144 lines
4.7 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>mktemp</title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="mktemp"></a> <a name="tag_03_375"></a><!-- mktemp -->
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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_375_01"></a>NAME</h4>
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<blockquote>mktemp - make a unique filename (<b>LEGACY</b>)</blockquote>
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<h4><a name="tag_03_375_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/stdlib.h.html">stdlib.h</a>><br>
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<br>
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char *mktemp(char *</tt><i>template</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_375_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>mktemp</i>() function shall replace the contents of the string pointed to by <i>template</i> by a unique filename and
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return <i>template</i>. The application shall initialize <i>template</i> to be a filename with six trailing <tt>'X'</tt> s;
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<i>mktemp</i>() shall replace each <tt>'X'</tt> with a single byte character from the portable filename character set.</p>
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</blockquote>
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<h4><a name="tag_03_375_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The <i>mktemp</i>() function shall return the pointer <i>template</i>. If a unique name cannot be created, <i>template</i> shall
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point to a null string.</p>
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</blockquote>
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<h4><a name="tag_03_375_05"></a>ERRORS</h4>
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<blockquote>
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<p>No errors are defined.</p>
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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_375_06"></a>EXAMPLES</h4>
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<blockquote>
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<h5><a name="tag_03_375_06_01"></a>Generating a Filename</h5>
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<p>The following example replaces the contents of the <tt>"template"</tt> string with a 10-character filename beginning with the
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characters <tt>"file"</tt> and returns a pointer to the <tt>"template"</tt> string that contains the new filename.</p>
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<pre>
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<tt>#include <stdlib.h>
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...
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char *template = "/tmp/fileXXXXXX";
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char *ptr;
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<br>
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ptr = mktemp(template);
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</tt>
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</pre>
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</blockquote>
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<h4><a name="tag_03_375_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>Between the time a pathname is created and the file opened, it is possible for some other process to create a file with the same
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name. The <a href="../functions/mkstemp.html"><i>mkstemp</i>()</a> function avoids this problem and is preferred over this
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function.</p>
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</blockquote>
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<h4><a name="tag_03_375_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_375_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>This function may be withdrawn in a future version.</p>
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</blockquote>
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<h4><a name="tag_03_375_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="mkstemp.html"><i>mkstemp</i>()</a> , <a href="tmpfile.html"><i>tmpfile</i>()</a> , <a href=
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"tmpnam.html"><i>tmpnam</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/stdlib.h.html"><i><stdlib.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_375_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_375_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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<h4><a name="tag_03_375_13"></a>Issue 6</h4>
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<blockquote>
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<p>This function is marked LEGACY.</p>
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<p>The DESCRIPTION is updated to avoid use of the term "must" for application requirements.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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UNIX ® is a registered Trademark of The Open Group.<br>
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