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 }