1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/JsonObject.h>
#include <AK/JsonValue.h>
#include <LibCore/DateTime.h>
#include <LibCore/File.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <time.h>
int main()
{
if (pledge("stdio rpath", nullptr) < 0) {
perror("pledge");
return 1;
}
if (unveil("/dev", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/etc/passwd", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/var/run/utmp", "r") < 0) {
perror("unveil");
return 1;
}
if (unveil("/proc", "r") < 0) {
perror("unveil");
return 1;
}
unveil(nullptr, nullptr);
auto file_or_error = Core::File::open("/var/run/utmp", Core::OpenMode::ReadOnly);
if (file_or_error.is_error()) {
warnln("Error: {}", file_or_error.error());
return 1;
}
auto& file = *file_or_error.value();
auto json = JsonValue::from_string(file.read_all());
if (!json.has_value() || !json.value().is_object()) {
warnln("Error: Could not parse /var/run/utmp");
return 1;
}
auto process_statistics = Core::ProcessStatisticsReader::get_all();
if (!process_statistics.has_value()) {
warnln("Error: Could not get process statistics");
return 1;
}
auto now = time(nullptr);
outln("\033[1m{:10} {:12} {:16} {:6} {}\033[0m", "USER", "TTY", "LOGIN@", "IDLE", "WHAT");
json.value().as_object().for_each_member([&](auto& tty, auto& value) {
const JsonObject& entry = value.as_object();
auto uid = entry.get("uid").to_u32();
[[maybe_unused]] auto pid = entry.get("pid").to_i32();
auto login_time = Core::DateTime::from_timestamp(entry.get("login_at").to_number<time_t>());
auto login_at = login_time.to_string("%b%d %H:%M:%S");
auto* pw = getpwuid(uid);
String username;
if (pw)
username = pw->pw_name;
else
username = String::number(uid);
StringBuilder builder;
String idle_string = "n/a";
struct stat st;
if (stat(tty.characters(), &st) == 0) {
auto idle_time = now - st.st_mtime;
if (idle_time >= 0) {
builder.appendff("{}s", idle_time);
idle_string = builder.to_string();
}
}
String what = "n/a";
for (auto& process : process_statistics.value().processes) {
if (process.tty == tty && process.pid == process.pgid)
what = process.name;
}
outln("{:10} {:12} {:16} {:6} {}", username, tty, login_at, idle_string, what);
});
return 0;
}
|
