1  /* Test FD* macros.
       2     Copyright (C) 1997-2023 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"