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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <LibCore/File.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <pwd.h>
namespace Core {
HashMap<uid_t, String> ProcessStatisticsReader::s_usernames;
Optional<AllProcessesStatistics> ProcessStatisticsReader::get_all(RefPtr<Core::File>& proc_all_file)
{
if (proc_all_file) {
if (!proc_all_file->seek(0, Core::SeekMode::SetPosition)) {
warnln("ProcessStatisticsReader: Failed to refresh /proc/all: {}", proc_all_file->error_string());
return {};
}
} else {
proc_all_file = Core::File::construct("/proc/all");
if (!proc_all_file->open(Core::OpenMode::ReadOnly)) {
warnln("ProcessStatisticsReader: Failed to open /proc/all: {}", proc_all_file->error_string());
return {};
}
}
AllProcessesStatistics all_processes_statistics;
auto file_contents = proc_all_file->read_all();
auto json = JsonValue::from_string(file_contents);
if (!json.has_value())
return {};
auto& json_obj = json.value().as_object();
json_obj.get("processes").as_array().for_each([&](auto& value) {
const JsonObject& process_object = value.as_object();
Core::ProcessStatistics process;
// kernel data first
process.pid = process_object.get("pid").to_u32();
process.pgid = process_object.get("pgid").to_u32();
process.pgp = process_object.get("pgp").to_u32();
process.sid = process_object.get("sid").to_u32();
process.uid = process_object.get("uid").to_u32();
process.gid = process_object.get("gid").to_u32();
process.ppid = process_object.get("ppid").to_u32();
process.nfds = process_object.get("nfds").to_u32();
process.kernel = process_object.get("kernel").to_bool();
process.name = process_object.get("name").to_string();
process.executable = process_object.get("executable").to_string();
process.tty = process_object.get("tty").to_string();
process.pledge = process_object.get("pledge").to_string();
process.veil = process_object.get("veil").to_string();
process.amount_virtual = process_object.get("amount_virtual").to_u32();
process.amount_resident = process_object.get("amount_resident").to_u32();
process.amount_shared = process_object.get("amount_shared").to_u32();
process.amount_dirty_private = process_object.get("amount_dirty_private").to_u32();
process.amount_clean_inode = process_object.get("amount_clean_inode").to_u32();
process.amount_purgeable_volatile = process_object.get("amount_purgeable_volatile").to_u32();
process.amount_purgeable_nonvolatile = process_object.get("amount_purgeable_nonvolatile").to_u32();
auto& thread_array = process_object.get_ptr("threads")->as_array();
process.threads.ensure_capacity(thread_array.size());
thread_array.for_each([&](auto& value) {
auto& thread_object = value.as_object();
Core::ThreadStatistics thread;
thread.tid = thread_object.get("tid").to_u32();
thread.times_scheduled = thread_object.get("times_scheduled").to_u32();
thread.name = thread_object.get("name").to_string();
thread.state = thread_object.get("state").to_string();
thread.time_user = thread_object.get("time_user").to_u64();
thread.time_kernel = thread_object.get("time_kernel").to_u64();
thread.cpu = thread_object.get("cpu").to_u32();
thread.priority = thread_object.get("priority").to_u32();
thread.syscall_count = thread_object.get("syscall_count").to_u32();
thread.inode_faults = thread_object.get("inode_faults").to_u32();
thread.zero_faults = thread_object.get("zero_faults").to_u32();
thread.cow_faults = thread_object.get("cow_faults").to_u32();
thread.unix_socket_read_bytes = thread_object.get("unix_socket_read_bytes").to_u32();
thread.unix_socket_write_bytes = thread_object.get("unix_socket_write_bytes").to_u32();
thread.ipv4_socket_read_bytes = thread_object.get("ipv4_socket_read_bytes").to_u32();
thread.ipv4_socket_write_bytes = thread_object.get("ipv4_socket_write_bytes").to_u32();
thread.file_read_bytes = thread_object.get("file_read_bytes").to_u32();
thread.file_write_bytes = thread_object.get("file_write_bytes").to_u32();
process.threads.append(move(thread));
});
// and synthetic data last
process.username = username_from_uid(process.uid);
all_processes_statistics.processes.append(move(process));
});
all_processes_statistics.total_time_scheduled = json_obj.get("total_time").to_u64();
all_processes_statistics.total_time_scheduled_kernel = json_obj.get("total_time_kernel").to_u64();
return all_processes_statistics;
}
Optional<AllProcessesStatistics> ProcessStatisticsReader::get_all()
{
RefPtr<Core::File> proc_all_file;
return get_all(proc_all_file);
}
String ProcessStatisticsReader::username_from_uid(uid_t uid)
{
if (s_usernames.is_empty()) {
setpwent();
while (auto* passwd = getpwent())
s_usernames.set(passwd->pw_uid, passwd->pw_name);
endpwent();
}
auto it = s_usernames.find(uid);
if (it != s_usernames.end())
return (*it).value;
return String::number(uid);
}
}
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