1MKTEMP(3P) POSIX Programmer's Manual MKTEMP(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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12 mktemp - make a unique filename (LEGACY)
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15 #include <stdlib.h>
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17 char *mktemp(char *template);
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21 The mktemp() function shall replace the contents of the string pointed
22 to by template by a unique filename and return template. The applica‐
23 tion shall initialize template to be a filename with six trailing 'X'
24 s; mktemp() shall replace each 'X' with a single byte character from
25 the portable filename character set.
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28 The mktemp() function shall return the pointer template. If a unique
29 name cannot be created, template shall point to a null string.
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32 No errors are defined.
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34 The following sections are informative.
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37 Generating a Filename
38 The following example replaces the contents of the "template" string
39 with a 10-character filename beginning with the characters "file" and
40 returns a pointer to the "template" string that contains the new file‐
41 name.
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44 #include <stdlib.h>
45 ...
46 char *template = "/tmp/fileXXXXXX";
47 char *ptr;
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50 ptr = mktemp(template);
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53 Between the time a pathname is created and the file opened, it is pos‐
54 sible for some other process to create a file with the same name. The
55 mkstemp() function avoids this problem and is preferred over this func‐
56 tion.
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59 None.
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62 This function may be withdrawn in a future version.
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65 mkstemp(), tmpfile(), tmpnam(), the Base Definitions volume of
66 IEEE Std 1003.1-2001, <stdlib.h>
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69 Portions of this text are reprinted and reproduced in electronic form
70 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
71 -- Portable Operating System Interface (POSIX), The Open Group Base
72 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
73 Electrical and Electronics Engineers, Inc and The Open Group. In the
74 event of any discrepancy between this version and the original IEEE and
75 The Open Group Standard, the original IEEE and The Open Group Standard
76 is the referee document. The original Standard can be obtained online
77 at http://www.opengroup.org/unix/online.html .
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81IEEE/The Open Group 2003 MKTEMP(3P)