Userland/Utilities/nproc.cpp


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

/*
 * Copyright (c) 2021, Peter Elliott <pelliott@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <AK/JsonObject.h>
#include <LibCore/Stream.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>

ErrorOr<int> serenity_main(Main::Arguments)
{
    TRY(Core::System::pledge("stdio rpath"));
    auto file = TRY(Core::Stream::File::open("/sys/kernel/cpuinfo"sv, Core::Stream::OpenMode::Read));

    auto buffer = TRY(file->read_until_eof());
    auto json = TRY(JsonValue::from_string(buffer));
    auto const& cpuinfo_array = json.as_array();
    outln("{}", cpuinfo_array.size());

    return 0;
}