stdio-common/tmpnam.c

   1 /* Copyright (C) 1991, 1993 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <stddef.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24
  25 /* Generate a unique filename in P_tmpdir.  */
  26 char *
  27 DEFUN(tmpnam, (s), register char *s)
  28 {
  29   register char *t = __stdio_gen_tempname((CONST char *) NULL,
  30                                           (CONST char *) NULL, 0,
  31                                           (size_t *) NULL, (FILE **) NULL);
  32
  33   if (t == NULL)
  34     return NULL;
  35
  36   if (s != NULL)
  37     (void) strcpy(s, t);
  38   else
  39     s = t;
  40
  41   return s;
  42 }