/* ioctl.c --- wrappers for Windows ioctl function

   Copyright (C) 2008-2019 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Paolo Bonzini */

#include <config.h>

#include <sys/ioctl.h>

#include <stdarg.h>

#if HAVE_IOCTL

/* Provide a wrapper with the POSIX prototype.  */

# undef ioctl

int

rpl_ioctl (int fd, int request, ... /* {void *,char *} arg */)

{

  void *buf;

  va_list args;

  va_start (args, request);

  buf = va_arg (args, void *);

  va_end (args);

  /* Cast 'request' so that when the system's ioctl function takes a 64-bit

     request argument, the value gets zero-extended, not sign-extended.  */

  return ioctl (fd, (unsigned int) request, buf);

}

#else /* mingw */

# include <errno.h>

/* Get HANDLE.  */

# define WIN32_LEAN_AND_MEAN

# include <windows.h>

# include "fd-hook.h"

/* Get _get_osfhandle.  */

# if GNULIB_MSVC_NOTHROW

#  include "msvc-nothrow.h"

# else

#  include <io.h>

# endif

static int

primary_ioctl (int fd, int request, void *arg)

{

  /* We don't support FIONBIO on pipes here.  If you want to make pipe

     fds non-blocking, use the gnulib 'nonblocking' module, until

     gnulib implements fcntl F_GETFL / F_SETFL with O_NONBLOCK.  */

  if ((HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE)

    errno = ENOSYS;

  else

    errno = EBADF;

  return -1;

}

int

ioctl (int fd, int request, ... /* {void *,char *} arg */)

{

  void *arg;

  va_list args;

  va_start (args, request);

  arg = va_arg (args, void *);

  va_end (args);

# if WINDOWS_SOCKETS

  return execute_all_ioctl_hooks (primary_ioctl, fd, request, arg);

# else

  return primary_ioctl (fd, request, arg);

# endif

}

#endif