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
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/QuickSort.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath tty"));
String this_tty = ttyname(STDIN_FILENO);
TRY(Core::System::pledge("stdio rpath"));
TRY(Core::System::unveil("/proc/all", "r"));
TRY(Core::System::unveil("/etc/passwd", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
enum class Alignment {
Left,
Right,
};
struct Column {
String title;
Alignment alignment { Alignment::Left };
int width { 0 };
String buffer;
};
bool every_process_flag = false;
bool full_format_flag = false;
String pid_list;
Core::ArgsParser args_parser;
args_parser.add_option(every_process_flag, "Show every process", nullptr, 'e');
args_parser.add_option(full_format_flag, "Full format", nullptr, 'f');
args_parser.add_option(pid_list, "A comma-separated list of PIDs. Only processes matching those PIDs will be selected", nullptr, 'q', "pid-list");
args_parser.parse(arguments);
Vector<Column> columns;
int uid_column = -1;
int pid_column = -1;
int ppid_column = -1;
int pgid_column = -1;
int sid_column = -1;
int state_column = -1;
int tty_column = -1;
int cmd_column = -1;
auto add_column = [&](auto title, auto alignment) {
columns.append({ title, alignment, 0, {} });
return columns.size() - 1;
};
if (full_format_flag) {
uid_column = add_column("UID", Alignment::Left);
pid_column = add_column("PID", Alignment::Right);
ppid_column = add_column("PPID", Alignment::Right);
pgid_column = add_column("PGID", Alignment::Right);
sid_column = add_column("SID", Alignment::Right);
state_column = add_column("STATE", Alignment::Left);
tty_column = add_column("TTY", Alignment::Left);
cmd_column = add_column("CMD", Alignment::Left);
} else {
pid_column = add_column("PID", Alignment::Right);
tty_column = add_column("TTY", Alignment::Left);
cmd_column = add_column("CMD", Alignment::Left);
}
auto all_processes = Core::ProcessStatisticsReader::get_all();
if (!all_processes.has_value())
return 1;
auto& processes = all_processes.value().processes;
if (!pid_list.is_empty()) {
every_process_flag = true;
auto string_parts = pid_list.split_view(',');
Vector<pid_t> selected_pids;
selected_pids.ensure_capacity(string_parts.size());
for (size_t i = 0; i < string_parts.size(); i++) {
auto pid = string_parts[i].to_int();
if (!pid.has_value()) {
warnln("Invalid value for -q: {}", pid_list);
warnln("Could not parse '{}' as a PID.", string_parts[i]);
return 1;
}
selected_pids.append(pid.value());
}
processes.remove_all_matching([&](auto& a) { return selected_pids.find(a.pid) == selected_pids.end(); });
auto processes_sort_predicate = [&selected_pids](auto& a, auto& b) {
return selected_pids.find_first_index(a.pid).value() < selected_pids.find_first_index(b.pid).value();
};
quick_sort(processes, processes_sort_predicate);
} else {
quick_sort(processes, [](auto& a, auto& b) { return a.pid < b.pid; });
}
Vector<Vector<String>> rows;
TRY(rows.try_ensure_capacity(1 + processes.size()));
Vector<String> header;
TRY(header.try_ensure_capacity(columns.size()));
for (auto& column : columns)
header.unchecked_append(column.title);
rows.append(move(header));
for (auto const& process : processes) {
auto tty = process.tty;
if (!every_process_flag && tty != this_tty)
continue;
if (tty.starts_with("/dev/"))
tty = tty.characters() + 5;
else
tty = "n/a";
auto* state = process.threads.is_empty() ? "Zombie" : process.threads.first().state.characters();
Vector<String> row;
TRY(row.try_resize(columns.size()));
if (uid_column != -1)
row[uid_column] = process.username;
if (pid_column != -1)
row[pid_column] = String::number(process.pid);
if (ppid_column != -1)
row[ppid_column] = String::number(process.ppid);
if (pgid_column != -1)
row[pgid_column] = String::number(process.pgid);
if (sid_column != -1)
row[sid_column] = String::number(process.sid);
if (tty_column != -1)
row[tty_column] = tty;
if (state_column != -1)
row[state_column] = state;
if (cmd_column != -1)
row[cmd_column] = process.name;
TRY(rows.try_append(move(row)));
}
for (size_t i = 0; i < columns.size(); i++) {
auto& column = columns[i];
for (auto& row : rows)
column.width = max(column.width, static_cast<int>(row[i].length()));
}
for (auto& row : rows) {
for (size_t i = 0; i < columns.size(); i++) {
auto& column = columns[i];
auto& cell_text = row[i];
if (!column.width) {
out("{}", cell_text);
continue;
}
if (column.alignment == Alignment::Right)
out("{1:>{0}} ", column.width, cell_text);
else
out("{1:{0}} ", column.width, cell_text);
if (i != columns.size() - 1)
out(" ");
}
outln();
}
return 0;
}
|
