tests/test-getdtablesize.c

   1 /* Test of getdtablesize() function.
   2    Copyright (C) 2008-2024 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 /* Tell GCC not to warn about the specific edge cases tested here.  */
  29 #if __GNUC__ >= 13
  30 # pragma GCC diagnostic ignored "-Wanalyzer-fd-leak"
  31 #endif
  32
  33 int
  34 main ()
  35 {
  36   ASSERT (getdtablesize () >= 3);
  37   ASSERT (dup2 (0, getdtablesize() - 1) == getdtablesize () - 1);
  38   ASSERT (dup2 (0, getdtablesize()) == -1);
  39
  40   return test_exit_status;
  41 }