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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 4.15 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)