ladybird/Userland/Utilities/nproc.cpp

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

#include <AK/JsonObject.h>
#include <LibCore/File.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::File::open("/sys/kernel/cpuinfo"sv, Core::File::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;
}
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00			`/*`
Everywhere: Use my cool new @serenityos.org email address 2021-09-01 02:32:46 +00:00			`* Copyright (c) 2021, Peter Elliott <pelliott@serenityos.org>`
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00			`*`
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt * 2021-04-22 08:24:48 +00:00			`* SPDX-License-Identifier: BSD-2-Clause`
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00			`*/`

			`#include <AK/JsonObject.h>`
LibCore: Move Stream-based file into the `Core` namespace 2023-02-09 02:02:46 +00:00			`#include <LibCore/File.h>`
LibCore+LibSystem: Move syscall wrappers from LibSystem to LibCore With this change, System::foo() becomes Core::System::foo(). Since LibCore builds on other systems than SerenityOS, we now have to make sure that wrappers work with just a standard C library underneath. 2021-11-23 09:59:50 +00:00			`#include <LibCore/System.h>`
nproc: Port to LibMain :^) 2021-11-22 18:43:26 +00:00			`#include <LibMain/Main.h>`
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00
nproc: Port to LibMain :^) 2021-11-22 18:43:26 +00:00			`ErrorOr<int> serenity_main(Main::Arguments)`
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00			`{`
Everywhere: Use default execpromises argument for Core::System::pledge 2021-11-27 22:26:34 +00:00			`TRY(Core::System::pledge("stdio rpath"));`
LibCore: Move Stream-based file into the `Core` namespace 2023-02-09 02:02:46 +00:00			`auto file = TRY(Core::File::open("/sys/kernel/cpuinfo"sv, Core::File::OpenMode::Read));`
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00
LibCore: Rename `Stream::read_all` to `read_until_eof` This generally seems like a better name, especially if we somehow also need a better name for "read the entire buffer, but not the entire file" somewhere down the line. 2022-12-11 16:49:00 +00:00			`auto buffer = TRY(file->read_until_eof());`
nproc: Port to Core::Stream 2022-09-14 16:00:12 +00:00			`auto json = TRY(JsonValue::from_string(buffer));`
nproc: Port to LibMain :^) 2021-11-22 18:43:26 +00:00			`auto const& cpuinfo_array = json.as_array();`
Userland: Add nproc utility nproc prints the number of processors on the system. Our ports system uses it. 2021-04-03 20:12:49 +00:00			`outln("{}", cpuinfo_array.size());`

			`return 0;`
			`}`