1/* ioctl.c --- wrappers for Windows ioctl function
2
3   Copyright (C) 2008-2014 Free Software Foundation, Inc.
4
5   This program is free software: you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program 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
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18/* Written by Paolo Bonzini */
19
20#include <config.h>
21
22#include <sys/ioctl.h>
23
24#include <stdarg.h>
25
26#if HAVE_IOCTL
27
28/* Provide a wrapper with the POSIX prototype.  */
29# undef ioctl
30int
31rpl_ioctl (int fd, int request, ... /* {void *,char *} arg */)
32{
33  void *buf;
34  va_list args;
35
36  va_start (args, request);
37  buf = va_arg (args, void *);
38  va_end (args);
39
40  /* Cast 'request' so that when the system's ioctl function takes a 64-bit
41     request argument, the value gets zero-extended, not sign-extended.  */
42  return ioctl (fd, (unsigned int) request, buf);
43}
44
45#else /* mingw */
46
47# include <errno.h>
48
49/* Get HANDLE.  */
50# define WIN32_LEAN_AND_MEAN
51# include <windows.h>
52
53# include "fd-hook.h"
54/* Get _get_osfhandle.  */
55# include "msvc-nothrow.h"
56
57static int
58primary_ioctl (int fd, int request, void *arg)
59{
60  /* We don't support FIONBIO on pipes here.  If you want to make pipe
61     fds non-blocking, use the gnulib 'nonblocking' module, until
62     gnulib implements fcntl F_GETFL / F_SETFL with O_NONBLOCK.  */
63
64  if ((HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE)
65    errno = ENOSYS;
66  else
67    errno = EBADF;
68  return -1;
69}
70
71int
72ioctl (int fd, int request, ... /* {void *,char *} arg */)
73{
74  void *arg;
75  va_list args;
76
77  va_start (args, request);
78  arg = va_arg (args, void *);
79  va_end (args);
80
81# if WINDOWS_SOCKETS
82  return execute_all_ioctl_hooks (primary_ioctl, fd, request, arg);
83# else
84  return primary_ioctl (fd, request, arg);
85# endif
86}
87
88#endif
89