Userland/Utilities/dmesg.cpp


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

/*
 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibCore/File.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>

ErrorOr<int> serenity_main(Main::Arguments)
{
    TRY(Core::System::pledge("stdio rpath"));
    TRY(Core::System::unveil("/sys/kernel/dmesg", "r"));
    TRY(Core::System::unveil(nullptr, nullptr));

    auto file = TRY(Core::File::open("/sys/kernel/dmesg", Core::OpenMode::ReadOnly));
    auto buffer = file->read_all();
    out("{}", StringView { buffer });
    return 0;
}