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/* ioctl.c --- wrappers for Windows ioctl function
Copyright (C) 2008-2022 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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
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