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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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mkdtemp(3) Library Functions Manual mkdtemp(3)
mkdtemp - create a unique temporary directory
Standard C library (libc, -lc)
#include <stdlib.h>
char *mkdtemp(char *template);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
mkdtemp():
/* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc 2.19 and earlier: */ _BSD_SOURCE
|| /* Since glibc 2.10: */ _POSIX_C_SOURCE >= 200809L
The mkdtemp() function generates a uniquely named temporary
directory from template. The last six characters of template must
be XXXXXX and these are replaced with a string that makes the
directory name unique. The directory is then created with
permissions 0700. Since it will be modified, template must not be
a string constant, but should be declared as a character array.
The mkdtemp() function returns a pointer to the modified template
string on success, and NULL on failure, in which case errno is set
to indicate the error.
EINVAL The last six characters of template were not XXXXXX. Now
template is unchanged.
Also see mkdir(2) for other possible values for errno.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ mkdtemp() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
glibc 2.1.91. NetBSD 1.4. POSIX.1-2008.
mktemp(1), mkdir(2), mkstemp(3), mktemp(3), tempnam(3),
tmpfile(3), tmpnam(3)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not
part of the original manual page), send a mail to
man-pages@man7.org
Linux man-pages 6.15 2025-05-17 mkdtemp(3)
Pages that refer to this page: mktemp(1), mkstemp(3), mktemp(3), file-hierarchy(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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