summaryrefslogtreecommitdiff
path: root/stdio-common/tmpnam_r.c
blob: 93de0403a427c0430fdbfc2a63f6f741ed297ab2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
/* Copyright (C) 1991-2017 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, see
   <http://www.gnu.org/licenses/>.  */

#include <stdio.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, 0, 0, __GT_NOCREATE))
    return NULL;

  return s;
}

link_warning (tmpnam_r,
	      "the use of `tmpnam_r' is dangerous, better use `mkstemp'")