misc/tst-fdset.c

   1 /* Test FD* macros.
   2    Copyright (C) 1997 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Robert Bihlmeyer <robbe@orcus.priv.at>.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23
  24 int
  25 main (void)
  26 {
  27   int retval = 0;
  28   int i;
  29   fd_set set;
  30
  31   FD_ZERO (&set);
  32   for (i=0; i < FD_SETSIZE; ++i)
  33     {
  34       printf ("%d =>  check:", i);
  35       if (FD_ISSET (i, &set) == 0)
  36         fputs ("ok", stdout);
  37       else
  38         {
  39           fputs ("nok", stdout);
  40           retval = 1;
  41         }
  42       fputs (", set", stdout);
  43       FD_SET (i, &set);
  44       fputs (", check:", stdout);
  45       if (FD_ISSET (i, &set))
  46         fputs ("ok", stdout);
  47       else
  48         {
  49           fputs ("nok", stdout);
  50           retval = 1;
  51         }
  52       fputs (", clear", stdout);
  53       FD_CLR (i, &set);
  54       fputs (", check:", stdout);
  55       if (FD_ISSET (i, &set) == 0)
  56         puts ("ok");
  57       else
  58         {
  59           puts ("nok");
  60           retval = 1;
  61         }
  62     }
  63
  64   return retval;
  65 }