tests/test-getdtablesize.c

   1 /* Test of getdtablesize() function.
   2    Copyright (C) 2008-2021 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 /* Written by Bruno Haible <bruno@clisp.org>, 2008.  */
  18
  19 #include <config.h>
  20
  21 #include <unistd.h>
  22
  23 #include "signature.h"
  24 SIGNATURE_CHECK (getdtablesize, int, (void));
  25
  26 #include "macros.h"
  27
  28 int
  29 main (int argc, char *argv[])
  30 {
  31   ASSERT (getdtablesize () >= 3);
  32   ASSERT (dup2 (0, getdtablesize() - 1) == getdtablesize () - 1);
  33   ASSERT (dup2 (0, getdtablesize()) == -1);
  34
  35   return 0;
  36 }