Update.
[glibc.git] / stdio-common / tmpnam_r.c
blob565a42401fdfb970fb9b78742447efaa1ede8e6f
1 /* Copyright (C) 1991,1993,1996-1999,2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <stdio.h>
21 /* Generate a unique filename in P_tmpdir. If S is NULL return NULL.
22 This makes this function thread safe. */
23 char *
24 tmpnam_r (char *s)
26 if (s == NULL)
27 return NULL;
29 if (__path_search (s, L_tmpnam, NULL, NULL, 0))
30 return NULL;
31 if (__gen_tempname (s, __GT_NOCREATE))
32 return NULL;
34 return s;
37 link_warning (tmpnam_r,
38 "the use of `tmpnam_r' is dangerous, better use `mkstemp'")