tests/test-dup.c

   1 /* Test duplicating a file descriptor.
   2    Copyright (C) 2011-2018 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program 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
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 #include <unistd.h>
  20
  21 #include "signature.h"
  22 SIGNATURE_CHECK (dup, int, (int));
  23
  24 #include <errno.h>
  25
  26 #include "macros.h"
  27
  28 int
  29 main (void)
  30 {
  31   /* Test behaviour for invalid file descriptors.  */
  32   {
  33     errno = 0;
  34     ASSERT (dup (-1) == -1);
  35     ASSERT (errno == EBADF);
  36   }
  37   {
  38     close (99);
  39     errno = 0;
  40     ASSERT (dup (99) == -1);
  41     ASSERT (errno == EBADF);
  42   }
  43
  44   return 0;
  45 }