Provided by: manpages-dev_2.17-1_all
tmpfile - create a temporary file
FILE *tmpfile (void);
The tmpfile() function generates a unique temporary filename. The
temporary file is then opened in binary read/write (w+b) mode. The
file will be automatically deleted when it is closed or the program
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.
EMFILE Too many file descriptors in use by the process.
ENFILE Too many files open in the system.
ENOSPC There was no room in the directory to add the new filename.
EROFS Read-only filesystem.
SVID 3, POSIX, 4.3BSD, ISO 9899, SUSv2
An error message may be written to stdout if the stream cannot be
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)