tmpfile - create a temporary file
() 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
() 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 filesystem.
SVr4, 4.3BSD, C89, C99, SUSv2, POSIX.1-2001.
POSIX.1-2001 specifies: an error message may be written to stdout
stream cannot be opened.
The standard does not specify the directory that tmpfile
() will use.
Glibc will try the path prefix P_tmpdir
, and if that fails the directory /tmp
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