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https://github.com/SerenityOS/serenity
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8464da1439
`Stream` will be qualified as `AK::Stream` until we remove the `Core::Stream` namespace. `IODevice` now reuses the `SeekMode` that is defined by `SeekableStream`, since defining its own would require us to qualify it with `AK::SeekMode` everywhere.
112 lines
5.6 KiB
C++
112 lines
5.6 KiB
C++
/*
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* Copyright (c) 2018-2021, 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/ByteBuffer.h>
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#include <AK/JsonArray.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonValue.h>
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#include <LibCore/ProcessStatisticsReader.h>
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#include <pwd.h>
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namespace Core {
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HashMap<uid_t, DeprecatedString> ProcessStatisticsReader::s_usernames;
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ErrorOr<AllProcessesStatistics> ProcessStatisticsReader::get_all(SeekableStream& proc_all_file, bool include_usernames)
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{
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TRY(proc_all_file.seek(0, SeekMode::SetPosition));
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AllProcessesStatistics all_processes_statistics;
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auto file_contents = TRY(proc_all_file.read_until_eof());
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auto json_obj = TRY(JsonValue::from_string(file_contents)).as_object();
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json_obj.get_array("processes"sv)->for_each([&](auto& value) {
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const JsonObject& process_object = value.as_object();
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Core::ProcessStatistics process;
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// kernel data first
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process.pid = process_object.get_u32("pid"sv).value_or(0);
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process.pgid = process_object.get_u32("pgid"sv).value_or(0);
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process.pgp = process_object.get_u32("pgp"sv).value_or(0);
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process.sid = process_object.get_u32("sid"sv).value_or(0);
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process.uid = process_object.get_u32("uid"sv).value_or(0);
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process.gid = process_object.get_u32("gid"sv).value_or(0);
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process.ppid = process_object.get_u32("ppid"sv).value_or(0);
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process.nfds = process_object.get_u32("nfds"sv).value_or(0);
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process.kernel = process_object.get_bool("kernel"sv).value_or(false);
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process.name = process_object.get_deprecated_string("name"sv).value_or("");
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process.executable = process_object.get_deprecated_string("executable"sv).value_or("");
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process.tty = process_object.get_deprecated_string("tty"sv).value_or("");
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process.pledge = process_object.get_deprecated_string("pledge"sv).value_or("");
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process.veil = process_object.get_deprecated_string("veil"sv).value_or("");
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process.amount_virtual = process_object.get_u32("amount_virtual"sv).value_or(0);
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process.amount_resident = process_object.get_u32("amount_resident"sv).value_or(0);
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process.amount_shared = process_object.get_u32("amount_shared"sv).value_or(0);
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process.amount_dirty_private = process_object.get_u32("amount_dirty_private"sv).value_or(0);
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process.amount_clean_inode = process_object.get_u32("amount_clean_inode"sv).value_or(0);
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process.amount_purgeable_volatile = process_object.get_u32("amount_purgeable_volatile"sv).value_or(0);
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process.amount_purgeable_nonvolatile = process_object.get_u32("amount_purgeable_nonvolatile"sv).value_or(0);
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auto& thread_array = process_object.get_array("threads"sv).value();
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process.threads.ensure_capacity(thread_array.size());
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thread_array.for_each([&](auto& value) {
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auto& thread_object = value.as_object();
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Core::ThreadStatistics thread;
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thread.tid = thread_object.get_u32("tid"sv).value_or(0);
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thread.times_scheduled = thread_object.get_u32("times_scheduled"sv).value_or(0);
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thread.name = thread_object.get_deprecated_string("name"sv).value_or("");
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thread.state = thread_object.get_deprecated_string("state"sv).value_or("");
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thread.time_user = thread_object.get_u64("time_user"sv).value_or(0);
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thread.time_kernel = thread_object.get_u64("time_kernel"sv).value_or(0);
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thread.cpu = thread_object.get_u32("cpu"sv).value_or(0);
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thread.priority = thread_object.get_u32("priority"sv).value_or(0);
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thread.syscall_count = thread_object.get_u32("syscall_count"sv).value_or(0);
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thread.inode_faults = thread_object.get_u32("inode_faults"sv).value_or(0);
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thread.zero_faults = thread_object.get_u32("zero_faults"sv).value_or(0);
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thread.cow_faults = thread_object.get_u32("cow_faults"sv).value_or(0);
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thread.unix_socket_read_bytes = thread_object.get_u32("unix_socket_read_bytes"sv).value_or(0);
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thread.unix_socket_write_bytes = thread_object.get_u32("unix_socket_write_bytes"sv).value_or(0);
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thread.ipv4_socket_read_bytes = thread_object.get_u32("ipv4_socket_read_bytes"sv).value_or(0);
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thread.ipv4_socket_write_bytes = thread_object.get_u32("ipv4_socket_write_bytes"sv).value_or(0);
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thread.file_read_bytes = thread_object.get_u32("file_read_bytes"sv).value_or(0);
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thread.file_write_bytes = thread_object.get_u32("file_write_bytes"sv).value_or(0);
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process.threads.append(move(thread));
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});
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// and synthetic data last
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if (include_usernames) {
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process.username = username_from_uid(process.uid);
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}
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all_processes_statistics.processes.append(move(process));
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});
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all_processes_statistics.total_time_scheduled = json_obj.get_u64("total_time"sv).value_or(0);
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all_processes_statistics.total_time_scheduled_kernel = json_obj.get_u64("total_time_kernel"sv).value_or(0);
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return all_processes_statistics;
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}
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ErrorOr<AllProcessesStatistics> ProcessStatisticsReader::get_all(bool include_usernames)
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{
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auto proc_all_file = TRY(Core::Stream::File::open("/sys/kernel/processes"sv, Core::Stream::OpenMode::Read));
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return get_all(*proc_all_file, include_usernames);
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}
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DeprecatedString ProcessStatisticsReader::username_from_uid(uid_t uid)
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{
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if (s_usernames.is_empty()) {
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setpwent();
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while (auto* passwd = getpwent())
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s_usernames.set(passwd->pw_uid, passwd->pw_name);
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endpwent();
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}
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auto it = s_usernames.find(uid);
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if (it != s_usernames.end())
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return (*it).value;
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return DeprecatedString::number(uid);
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}
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}
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