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uptime: Add -s/--since option to output only when the system came online
This also matches Linux and the BSDs.
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2 changed files with 13 additions and 1 deletions
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@ -16,6 +16,7 @@ This information includes when the system came online and how long it has been u
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## Options
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* `-p`, `--pretty`: Output only the uptime, in human-readable format.
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* `-s`, `--since`: Output only the datetime when the system came online.
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## Examples
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@ -28,3 +29,8 @@ $ uptime
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$ uptime -p
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Up 2 minutes, 20 seconds
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```
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```sh
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$ uptime -s
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2024-01-24 06:23:27
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```
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@ -18,9 +18,11 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
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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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@ -34,7 +36,11 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
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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 (pretty_output) {
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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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