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#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <LibCore/CFile.h>
#include <LibCore/CProcessStatisticsReader.h>
#include <pwd.h>
#include <stdio.h>
HashMap<uid_t, String> CProcessStatisticsReader::s_usernames;
HashMap<pid_t, CProcessStatistics> CProcessStatisticsReader::get_all()
{
auto file = CFile::construct("/proc/all");
if (!file->open(CIODevice::ReadOnly)) {
fprintf(stderr, "CProcessStatisticsReader: Failed to open /proc/all: %s\n", file->error_string());
return {};
}
HashMap<pid_t, CProcessStatistics> map;
auto file_contents = file->read_all();
auto json = JsonValue::from_string({ file_contents.data(), file_contents.size() });
json.as_array().for_each([&](auto& value) {
const JsonObject& process_object = value.as_object();
CProcessStatistics process;
// kernel data first
process.pid = process_object.get("pid").to_u32();
process.times_scheduled = process_object.get("times_scheduled").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.state = process_object.get("state").to_string();
process.ppid = process_object.get("ppid").to_u32();
process.nfds = process_object.get("nfds").to_u32();
process.name = process_object.get("name").to_string();
process.tty = process_object.get("tty").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.ticks = process_object.get("ticks").to_u32();
process.priority = process_object.get("priority").to_string();
process.syscall_count = process_object.get("syscall_count").to_u32();
process.inode_faults = process_object.get("inode_faults").to_u32();
process.zero_faults = process_object.get("zero_faults").to_u32();
process.cow_faults = process_object.get("cow_faults").to_u32();
process.icon_id = process_object.get("icon_id").to_int();
// and synthetic data last
process.username = username_from_uid(process.uid);
map.set(process.pid, process);
});
return map;
}
String CProcessStatisticsReader::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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