tmpfile (3)
Leading comments
Copyright 1993 David Metcalfe (david@prism.demon.co.uk) %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Sin...
NAME
tmpfile - create a temporary fileSYNOPSIS
#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.
- 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 |
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2.NOTES
POSIX.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.