TMPFILESection: Linux Programmer's Manual (3)
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NAMEtmpfile - create a temporary file
#include <stdio.h> FILE *tmpfile(void);
DESCRIPTIONThe 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 VALUEThe 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.
- Search permission denied for directory in file's path prefix.
- Unable to generate a unique filename.
- The call was interrupted by a signal.
- Too many file descriptors in use by the process.
- Too many files open in the system.
- There was no room in the directory to add the new filename.
- Read-only file system.
CONFORMING TOSVr4, 4.3BSD, C89, C99, SUSv2, POSIX.1-2001.
NOTESPOSIX.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.
SEE ALSOexit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.