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https://github.com/SerenityOS/serenity
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ccd701809f
`JsonValue::to_byte_string` has peculiar type-erasure semantics which is not usually intended. Unfortunately, it also has a very stereotypical name which does not warn about unexpected behavior. So let's prefix it with `deprecated_` to make new code use `as_string` if it just wants to get string value or `serialized<StringBuilder>` if it needs to do proper serialization.
52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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* Copyright (c) 2022, Andreas Kling <kling@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/JsonArray.h>
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#include <AK/JsonObject.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)
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{
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TRY(Core::System::pledge("stdio rpath"));
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TRY(Core::System::unveil("/sys/kernel/interrupts", "r"));
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TRY(Core::System::unveil(nullptr, nullptr));
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auto proc_interrupts = TRY(Core::File::open("/sys/kernel/interrupts"sv, Core::File::OpenMode::Read));
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TRY(Core::System::pledge("stdio"));
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auto file_contents = TRY(proc_interrupts->read_until_eof());
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auto json = TRY(JsonValue::from_string(file_contents));
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auto cpu_count = json.as_array().at(0).as_object().get_array("per_cpu_call_counts"sv)->size();
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out(" "sv);
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for (size_t i = 0; i < cpu_count; ++i) {
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out("{:>10}", ByteString::formatted("CPU{}", i));
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}
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outln("");
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json.as_array().for_each([cpu_count](JsonValue const& value) {
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auto& handler = value.as_object();
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auto purpose = handler.get_byte_string("purpose"sv).value_or({});
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auto interrupt = handler.get_u8("interrupt_line"sv).value();
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auto controller = handler.get_byte_string("controller"sv).value_or({});
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auto call_counts = handler.get_array("per_cpu_call_counts"sv).value();
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out("{:>4}: ", interrupt);
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for (size_t i = 0; i < cpu_count; ++i)
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out("{:>10}", call_counts[i].as_integer<u64>());
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outln(" {:10} {:30}", controller, purpose);
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});
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return 0;
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}
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