glibc/stdio-common/tmpfile64.c

53 lines
1.6 KiB
C

/* Copyright (C) 1991,1993,1996,1997,1998,1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdio.h>
#include <unistd.h>
#ifdef USE_IN_LIBIO
# include <iolibio.h>
# define __fdopen _IO_fdopen
#endif
/* This returns a new stream opened on a temporary file (generated
by tmpnam) The file is opened with mode "w+b" (binary read/write).
If we couldn't generate a unique filename or the file couldn't
be opened, NULL is returned. */
FILE *
tmpfile64 ()
{
char buf[FILENAME_MAX];
int fd;
FILE *f;
if (__path_search (buf, FILENAME_MAX, NULL, "tmpf", 0))
return NULL;
fd = __gen_tempname (buf, __GT_BIGFILE);
if (fd < 0)
return NULL;
/* Note that this relies on the Unix semantics that
a file is not really removed until it is closed. */
(void) remove (buf);
if ((f = __fdopen (fd, "w+b")) == NULL)
__close (fd);
return f;
}