1  /* Test of ioctl() function.
       2     Copyright (C) 2011-2022 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  #include <config.h>
      18  
      19  /* Specification.  */
      20  #include <sys/ioctl.h>
      21  
      22  #include "signature.h"
      23  SIGNATURE_CHECK (ioctl, int, (int, int, ...));
      24  
      25  #include <errno.h>
      26  #include <unistd.h>
      27  
      28  #include "macros.h"
      29  
      30  int
      31  main (void)
      32  {
      33  #ifdef FIONREAD
      34    /* Test behaviour for invalid file descriptors.  */
      35    {
      36      int value;
      37      errno = 0;
      38      ASSERT (ioctl (-1, FIONREAD, &value) == -1);
      39      ASSERT (errno == EBADF);
      40    }
      41    {
      42      int value;
      43      close (99);
      44      errno = 0;
      45      ASSERT (ioctl (99, FIONREAD, &value) == -1);
      46      ASSERT (errno == EBADF);
      47    }
      48  #endif
      49  
      50    return 0;
      51  }