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04277e02 1/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
9d187dd4 2 This file is part of the GNU C Library.
d68171ed 3
9d187dd4 4 The GNU C Library is free software; you can redistribute it and/or
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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.
d68171ed 8
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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
41bdb6e2 12 Lesser General Public License for more details.
d68171ed 13
41bdb6e2 14 You should have received a copy of the GNU Lesser General Public
59ba27a6 15 License along with the GNU C Library; if not, see
5a82c748 16 <https://www.gnu.org/licenses/>. */
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17
18#include <stdio.h>
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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)
24{
25 if (s == NULL)
26 return NULL;
27
60876a75 28 if (__path_search (s, L_tmpnam, NULL, NULL, 0))
7cabd57c 29 return NULL;
7f3146e7 30 if (__gen_tempname (s, 0, 0, __GT_NOCREATE))
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31 return NULL;
32
33 return s;
d68171ed 34}
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35
36link_warning (tmpnam_r,
37 "the use of `tmpnam_r' is dangerous, better use `mkstemp'")