Kernel/Syscalls/mknod.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/StringView.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Process.h>

namespace Kernel {

KResultOr<FlatPtr> Process::sys$mknod(Userspace<const Syscall::SC_mknod_params*> user_params)
{
    VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
    REQUIRE_PROMISE(dpath);
    auto params = TRY(copy_typed_from_user(user_params));

    if (!is_superuser() && !is_regular_file(params.mode) && !is_fifo(params.mode) && !is_socket(params.mode))
        return EPERM;
    auto path = TRY(get_syscall_path_argument(params.path));
    return VirtualFileSystem::the().mknod(path->view(), params.mode & ~umask(), params.dev, current_directory());
}

}