jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/Userspace.h>
8#include <Kernel/API/Ioctl.h>
9#include <Kernel/FileSystem/OpenFileDescription.h>
10#include <Kernel/Process.h>
11
12namespace Kernel {
13
14ErrorOr<FlatPtr> Process::sys$ioctl(int fd, unsigned request, FlatPtr arg)
15{
16 VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
17 auto description = TRY(open_file_description(fd));
18 if (request == FIONBIO) {
19 description->set_blocking(TRY(copy_typed_from_user(Userspace<int const*>(arg))) == 0);
20 return 0;
21 }
22 if (request == FIOCLEX) {
23 m_fds.with_exclusive([&](auto& fds) {
24 fds[fd].set_flags(fds[fd].flags() | FD_CLOEXEC);
25 });
26 return 0;
27 }
28 if (request == FIONCLEX) {
29 m_fds.with_exclusive([&](auto& fds) {
30 fds[fd].set_flags(fds[fd].flags() & ~FD_CLOEXEC);
31 });
32 return 0;
33 }
34 TRY(description->file().ioctl(*description, request, arg));
35 return 0;
36}
37
38}