tmpfile man page on Archlinux

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

       tmpfile - create a temporary file

       #include <stdio.h>

       FILE *tmpfile(void);

       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.

       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.

       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.

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

       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.

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

       This page is part of release 3.65 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at

				  2008-07-14			    TMPFILE(3)

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