NAME¶
tmpfile - create a temporary file
SYNOPSIS¶
#include <stdio.h>
FILE *tmpfile(void);
DESCRIPTION¶
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.
RETURN VALUE¶
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.
ERRORS¶
- 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.
ATTRIBUTES¶
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.
NOTES¶
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.
COLOPHON¶
This page is part of release 5.04 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/.
