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LibCore: Port CProcessStatisticsReader to the JSON formatted /proc/all.

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This commit is contained in:
Andreas Kling 2019-06-29 10:12:40 +02:00
parent 14b51253c0
commit c9826bb429
1 changed files with 20 additions and 62 deletions
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82
LibCore/CProcessStatisticsReader.cpp
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@ -1,6 +1,8 @@
#include "CProcessStatisticsReader.h"
#include "CFile.h"
#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>
@ -27,67 +29,23 @@ void CProcessStatisticsReader::update_map(HashMap<pid_t, CProcessStatistics>& ma
return;
}
for (;;) {
auto line = file.read_line(1024);
if (line.is_empty())
break;
auto chomped = String((const char*)line.pointer(), line.size() - 1, Chomp);
auto parts = chomped.split_view(',');
if (parts.size() < 18)
break;
bool ok = false;
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;
process.pid = parts[0].to_uint(ok);
if (!ok) {
fprintf(stderr, "CProcessHelper : couldn't convert %s to a valid pid\n", parts[0].characters());
return;
}
process.nsched = parts[1].to_uint(ok);
if (!ok) {
fprintf(stderr, "CProcessHelper : couldn't convert %s to a valid nsched value\n", parts[1].characters());
return;
}
uid_t uid = parts[5].to_uint(ok);
if (!ok) {
fprintf(stderr, "CProcessHelper : couldn't convert %s to a valid uid value\n", parts[5].characters());
return;
}
process.uid = uid;
process.username = get_username_from_uid(uid);
process.priority = parts[16];
process.syscalls = parts[17].to_uint(ok);
if (!ok) {
fprintf(stderr, "CProcessHelper : couldn't convert %s to a valid syscalls count value\n", parts[17].characters());
return;
}
process.state = parts[7];
process.name = parts[11];
process.virtual_size = parts[12].to_uint(ok);
if (!ok) {
fprintf(stderr, "CProcessHelper : couldn't convert %s to a valid amount of virtual address space used\n", parts[12].characters());
return;
}
process.physical_size = parts[13].to_uint(ok);
if (!ok) {
fprintf(stderr, "CProcessHelper : couldn't convert %s to a valid amount of physical address space used\n", parts[13].characters());
return;
}
process.pid = process_object.get("pid").to_dword();
process.nsched = process_object.get("times_scheduled").to_dword();
process.uid = process_object.get("uid").to_dword();
process.username = get_username_from_uid(process.uid);
process.priority = process_object.get("priority").to_string();
process.syscalls = process_object.get("syscall_count").to_dword();
process.state = process_object.get("state").to_string();
process.name = process_object.get("name").to_string();
process.virtual_size = process_object.get("amount_virtual").to_dword();
process.physical_size = process_object.get("amount_resident").to_dword();
map.set(process.pid, process);
}
});
}
String CProcessStatisticsReader::get_username_from_uid(const uid_t uid)