1/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <stdio.h>
19
20/* Generate a unique filename in P_tmpdir. If S is NULL return NULL.
21 This makes this function thread safe. */
22char *
23tmpnam_r (char s[L_tmpnam])
24{
25 if (s == NULL)
26 return NULL;
27
28 if (__path_search (s, L_tmpnam, NULL, NULL, 0))
29 return NULL;
30 if (__gen_tempname (s, 0, 0, __GT_NOCREATE))
31 return NULL;
32
33 return s;
34}
35
36link_warning (tmpnam_r,
37 "the use of `tmpnam_r' is dangerous, better use `mkstemp'")
38