misc/ioctl.c

   1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/ioctl.h>
  20
  21 /* Perform the I/O control operation specified by REQUEST on FD.
  22    The actual type and use of ARG and the return value depend on REQUEST.  */
  23 int
  24 __ioctl (int fd, unsigned long int request, ...)
  25 {
  26   __set_errno (ENOSYS);
  27   return -1;
  28 }
  29 stub_warning (ioctl)
  30
  31 libc_hidden_def (__ioctl)
  32 weak_alias (__ioctl, ioctl)