uclibc-ng/libc/stdio/tmpnam_r.c

/* Copyright (C) 1991, 1993, 1996, 1997, 1998 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   see <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include "../misc/internals/tempname.h"

/* Generate a unique filename in P_tmpdir.  If S is NULL return NULL.
   This makes this function thread safe.  */
char * tmpnam_r (char *s)
{
    if (s == NULL)
	return NULL;

    if (__path_search (s, L_tmpnam, NULL, NULL, 0))
	return NULL;
    if (__gen_tempname (s, __GT_NOCREATE, 0, 0))
	return NULL;

    return s;
}