tests/test-ioctl.c

   1 /* Test of ioctl() function.
   2    Copyright (C) 2011-2020 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 }