ladybird/Userland/Utilities/uptime.cpp
2024-01-25 09:07:32 +01:00

54 lines
2.0 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2022, Karol Kosek <krkk@serenityos.org>
* Copyright (c) 2024, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/NumberFormat.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DateTime.h>
#include <LibCore/File.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath"));
bool pretty_output = false;
bool output_since = false;
Core::ArgsParser args_parser;
args_parser.add_option(pretty_output, "Output only the uptime, in human-readable format", "pretty", 'p');
args_parser.add_option(output_since, "Show when the system is up since, in yyyy-mm-dd HH:MM:SS format", "since", 's');
args_parser.parse(arguments);
auto file = TRY(Core::File::open("/sys/kernel/uptime"sv, Core::File::OpenMode::Read));
TRY(Core::System::pledge("stdio"));
Array<u8, BUFSIZ> buffer;
auto read_buffer = TRY(file->read_some(buffer));
auto maybe_seconds = AK::StringUtils::convert_to_uint(StringView(read_buffer));
if (!maybe_seconds.has_value())
return Error::from_string_literal("Couldn't convert to number");
auto seconds = maybe_seconds.release_value();
if (output_since) {
auto since_timestamp = Core::DateTime::now().timestamp() - seconds;
auto since_time = TRY(Core::DateTime::from_timestamp(since_timestamp).to_string());
outln("{}", since_time);
} else if (pretty_output) {
outln("Up {}", human_readable_time(seconds));
} else {
auto current_time = TRY(Core::DateTime::now().to_string());
// FIXME: To match Linux and the BSDs, we should also include the number of current users,
// and some load averages, but these don't seem to be available yet.
outln("{} up {}", current_time, human_readable_digital_time(seconds));
}
return 0;
}