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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 4.09 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)



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