tmpfile3
Create a temporary file
Usage
#include <stdio.h>
FILE *tmpfile(void);
Library
Standard C library (libc, -lc)
Overview
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.
Notes
POSIX.1-2001 specifies: an error message may be written to stdout if the stream cannot be opened.
Releases
19 releases since Debian 1.1 (Buzz); the text changed 14 times.