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500044906d
This is not guaranteed to always work correctly as ArgsParser deals in StringViews and might have a non-properly-null-terminated string as a value. As a bonus, using StringView (and DeprecatedString where necessary) leads to nicer looking code too :^)
86 lines
3.2 KiB
C++
86 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020-2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/DeprecatedString.h>
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#include <AK/JsonObject.h>
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#include <AK/QuickSort.h>
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#include <LibCore/ArgsParser.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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TRY(Core::System::unveil("/proc", "r"));
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TRY(Core::System::unveil(nullptr, nullptr));
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StringView pid;
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static bool extended = false;
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Core::ArgsParser args_parser;
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args_parser.add_option(extended, "Extended output", nullptr, 'x');
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args_parser.add_positional_argument(pid, "PID", "PID", Core::ArgsParser::Required::Yes);
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args_parser.parse(arguments);
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auto file = TRY(Core::File::open(DeprecatedString::formatted("/proc/{}/vm", pid), Core::File::OpenMode::Read));
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outln("{}:", pid);
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auto padding = " ";
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if (extended) {
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outln("Address{} Size Resident Dirty Access VMObject Type Purgeable CoW Pages Name", padding);
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} else {
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outln("Address{} Size Access Name", padding);
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}
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auto file_contents = TRY(file->read_until_eof());
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auto json = TRY(JsonValue::from_string(file_contents));
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Vector<JsonValue> sorted_regions = json.as_array().values();
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quick_sort(sorted_regions, [](auto& a, auto& b) {
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return a.as_object().get_addr("address"sv).value_or(0) < b.as_object().get_addr("address"sv).value_or(0);
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});
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for (auto& value : sorted_regions) {
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auto& map = value.as_object();
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auto address = map.get_addr("address"sv).value_or(0);
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auto size = map.get("size"sv).value_or({}).to_deprecated_string();
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auto access = DeprecatedString::formatted("{}{}{}{}{}",
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(map.get_bool("readable"sv).value_or(false) ? "r" : "-"),
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(map.get_bool("writable"sv).value_or(false) ? "w" : "-"),
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(map.get_bool("executable"sv).value_or(false) ? "x" : "-"),
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(map.get_bool("shared"sv).value_or(false) ? "s" : "-"),
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(map.get_bool("syscall"sv).value_or(false) ? "c" : "-"));
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out("{:p} ", address);
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out("{:>10} ", size);
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if (extended) {
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auto resident = map.get("amount_resident"sv).value_or({}).to_deprecated_string();
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auto dirty = map.get("amount_dirty"sv).value_or({}).to_deprecated_string();
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auto vmobject = map.get_deprecated_string("vmobject"sv).value_or({});
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if (vmobject.ends_with("VMObject"sv))
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vmobject = vmobject.substring(0, vmobject.length() - 8);
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auto purgeable = map.get("purgeable"sv).value_or({}).to_deprecated_string();
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auto cow_pages = map.get("cow_pages"sv).value_or({}).to_deprecated_string();
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out("{:>10} ", resident);
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out("{:>10} ", dirty);
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out("{:6} ", access);
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out("{:14} ", vmobject);
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out("{:10} ", purgeable);
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out("{:>10} ", cow_pages);
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} else {
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out("{:6} ", access);
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}
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auto name = map.get_deprecated_string("name"sv).value_or({});
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out("{:20}", name);
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outln();
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}
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return 0;
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}
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