TMPFILE(3)                          Linux Programmer's Manual                          TMPFILE(3)



NAME
       tmpfile - create a temporary file

SYNOPSIS
       #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 indi‐
       cate 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 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.

CONFORMING TO
       SVr4, 4.3BSD, C89, C99, SUSv2, POSIX.1-2001.

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.

SEE ALSO
       exit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)

COLOPHON
       This page is part of release 3.74 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.



                                            2008-07-14                                 TMPFILE(3)