sysdeps/unix/sysv/linux/ioctl.c

   1 /* Control device.  Linux generic implementation.
   2    Copyright (C) 2021-2022 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 <stdarg.h>
  20 #include <sys/ioctl.h>
  21 #include <sysdep.h>
  22 #include <internal-ioctl.h>
  23
  24 int
  25 __ioctl (int fd, unsigned long int request, ...)
  26 {
  27   va_list args;
  28   va_start (args, request);
  29   void *arg = va_arg (args, void *);
  30   va_end (args);
  31
  32   int r;
  33   if (!__ioctl_arch (&r, fd, request, arg))
  34     {
  35       r = INTERNAL_SYSCALL_CALL (ioctl, fd, request, arg);
  36       if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (r)))
  37         {
  38           __set_errno (-r);
  39           return -1;
  40         }
  41     }
  42   return r;
  43 }
  44 libc_hidden_def (__ioctl)
  45 weak_alias (__ioctl, ioctl)
  46
  47 #if __TIMESIZE != 64
  48 strong_alias (__ioctl, __ioctl_time64)
  49 #endif