stdio-common/tst-tmpnam.c

   1 /* Copyright (C) 1998 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 int
  23 main (void)
  24 {
  25   const char *name;
  26   int retval = 0;
  27
  28   /* Set TMPDIR to a value other than the traditional /tmp.  */
  29   setenv ("TMPDIR", "/usr", 1);
  30
  31   name = tmpnam (NULL);
  32
  33   printf ("name = %s\n", name);
  34
  35   /* Make sure the name is not based on the value in TMPDIR.  */
  36   if (strncmp (name, "/usr", 4) == 0)
  37     {
  38       puts ("error: `tmpnam' used TMPDIR value");
  39       retval = 1;
  40     }
  41
  42   /* Test that it is in the directory denoted by P_tmpdir.  */
  43   if (strncmp (name, P_tmpdir, sizeof (P_tmpdir) - 1) != 0)
  44     {
  45       puts ("error: `tmpnam' return value not in P_tmpdir directory");
  46       retval = 1;
  47     }
  48
  49   return retval;
  50 }