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