misc/tst-fdset.c

   1 /* Test FD* macros.
   2    Copyright (C) 1997-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <sys/types.h>
  21
  22 static int
  23 do_test (void)
  24 {
  25   int retval = 0;
  26   int i;
  27   fd_set set;
  28
  29   FD_ZERO (&set);
  30   for (i=0; i < FD_SETSIZE; ++i)
  31     {
  32       printf ("%d =>  check:", i);
  33       if (FD_ISSET (i, &set) == 0)
  34         fputs ("ok", stdout);
  35       else
  36         {
  37           fputs ("nok", stdout);
  38           retval = 1;
  39         }
  40       fputs (", set", stdout);
  41       FD_SET (i, &set);
  42       fputs (", check:", stdout);
  43       if (FD_ISSET (i, &set))
  44         fputs ("ok", stdout);
  45       else
  46         {
  47           fputs ("nok", stdout);
  48           retval = 1;
  49         }
  50       fputs (", clear", stdout);
  51       FD_CLR (i, &set);
  52       fputs (", check:", stdout);
  53       if (FD_ISSET (i, &set) == 0)
  54         puts ("ok");
  55       else
  56         {
  57           puts ("nok");
  58           retval = 1;
  59         }
  60     }
  61
  62   return retval;
  63 }
  64
  65 #define TEST_FUNCTION do_test ()
  66 #include "../test-skeleton.c"