src/system/libroot/posix/glibc/stdio-common/tmpnam_r.c

   1 /* Copyright (C) 1991,1993,1996-1999,2000 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.
  18 */
  19
  20
  21 #include <stdio_private.h>
  22
  23
  24 /** Generate a unique filename in P_tmpdir.  If S is NULL return NULL.
  25  *      This makes this function thread safe.
  26  */
  27
  28 char *
  29 tmpnam_r(char *s)
  30 {
  31         if (s == NULL)
  32                 return NULL;
  33
  34         if (__path_search(s, L_tmpnam, NULL, NULL, 0))
  35                 return NULL;
  36         if (__gen_tempname(s, __GT_NOCREATE))
  37                 return NULL;
  38
  39         return s;
  40 }
  41
  42 //link_warning (tmpnam_r, "the use of `tmpnam_r' is dangerous, better use `mkstemp'")