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glibc  2.9
tst-fdset.c
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00001 /* Test FD* macros.
00002    Copyright (C) 1997 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Robert Bihlmeyer <robbe@orcus.priv.at>.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <stdio.h>
00022 #include <sys/types.h>
00023 
00024 int
00025 main (void)
00026 {
00027   int retval = 0;
00028   int i;
00029   fd_set set;
00030 
00031   FD_ZERO (&set);
00032   for (i=0; i < FD_SETSIZE; ++i)
00033     {
00034       printf ("%d =>  check:", i);
00035       if (FD_ISSET (i, &set) == 0)
00036        fputs ("ok", stdout);
00037       else
00038        {
00039          fputs ("nok", stdout);
00040          retval = 1;
00041        }
00042       fputs (", set", stdout);
00043       FD_SET (i, &set);
00044       fputs (", check:", stdout);
00045       if (FD_ISSET (i, &set))
00046        fputs ("ok", stdout);
00047       else
00048        {
00049          fputs ("nok", stdout);
00050          retval = 1;
00051        }
00052       fputs (", clear", stdout);
00053       FD_CLR (i, &set);
00054       fputs (", check:", stdout);
00055       if (FD_ISSET (i, &set) == 0)
00056        puts ("ok");
00057       else
00058        {
00059          puts ("nok");
00060          retval = 1;
00061        }
00062     }
00063 
00064   return retval;
00065 }