tmpfile

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 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; see signal(7).

       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.

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

COLOPHON
       This page is part of release 5.03 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
       https://www.kernel.org/doc/man-pages/.



                                  2016-03-15                        TMPFILE(3)