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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
TMPFILE(3) Linux Programmer's Manual TMPFILE(3)
tmpfile - create a temporary file
#include <stdio.h>
FILE *tmpfile(void);
The tmpfile() function opens a unique temporary file in binary
read/write (w+b) mode. The file will be automatically deleted when
it is closed or the program terminates.
The tmpfile() function returns a stream descriptor, or NULL if a
unique filename cannot be generated or the unique file cannot be
opened. In the latter case, errno is set to indicate the error.
EACCES Search permission denied for directory in file's path prefix.
EEXIST Unable to generate a unique filename.
EINTR The call was interrupted by a signal; see signal(7).
EMFILE The per-process limit on the number of open file descriptors
has been reached.
ENFILE The system-wide limit on the total number of open files has
been reached.
ENOSPC There was no room in the directory to add the new filename.
EROFS Read-only filesystem.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├──────────┼───────────────┼─────────┤
│tmpfile() │ Thread safety │ MT-Safe │
└──────────┴───────────────┴─────────┘
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2.
POSIX.1-2001 specifies: an error message may be written to stdout if
the stream cannot be opened.
The standard does not specify the directory that tmpfile() will use.
Glibc will try the path prefix P_tmpdir defined in <stdio.h>, and if
that fails the directory /tmp.
exit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)
This page is part of release 4.12 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
2016-03-15 TMPFILE(3)
Pages that refer to this page: getpid(2), open(2), exit(3), mkdtemp(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)