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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