| 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. |
NAME
tmpfile - create a temporary file
LIBRARY
Standard C library (libc, -lc)
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 |
VERSIONS
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, then the directory /tmp.
STANDARDS
C11, POSIX.1-2008.
HISTORY
POSIX.1-2001, C89, SVr4, 4.3BSD, SUSv2.
NOTES
POSIX.1-2001 specifies: an error message may be written to stdout if the stream cannot be opened.
SEE ALSO
exit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)