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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/JsonArray.h>
28#include <AK/JsonObject.h>
29#include <AK/JsonValue.h>
30#include <LibCore/File.h>
31#include <LibCore/ProcessStatisticsReader.h>
32#include <pwd.h>
33#include <stdio.h>
34
35namespace Core {
36
37HashMap<uid_t, String> ProcessStatisticsReader::s_usernames;
38
39HashMap<pid_t, Core::ProcessStatistics> ProcessStatisticsReader::get_all()
40{
41 auto file = Core::File::construct("/proc/all");
42 if (!file->open(Core::IODevice::ReadOnly)) {
43 fprintf(stderr, "CProcessStatisticsReader: Failed to open /proc/all: %s\n", file->error_string());
44 return {};
45 }
46
47 HashMap<pid_t, Core::ProcessStatistics> map;
48
49 auto file_contents = file->read_all();
50 auto json = JsonValue::from_string({ file_contents.data(), (size_t)file_contents.size() });
51 json.as_array().for_each([&](auto& value) {
52 const JsonObject& process_object = value.as_object();
53 Core::ProcessStatistics process;
54
55 // kernel data first
56 process.pid = process_object.get("pid").to_u32();
57 process.pgid = process_object.get("pgid").to_u32();
58 process.pgp = process_object.get("pgp").to_u32();
59 process.sid = process_object.get("sid").to_u32();
60 process.uid = process_object.get("uid").to_u32();
61 process.gid = process_object.get("gid").to_u32();
62 process.ppid = process_object.get("ppid").to_u32();
63 process.nfds = process_object.get("nfds").to_u32();
64 process.name = process_object.get("name").to_string();
65 process.tty = process_object.get("tty").to_string();
66 process.pledge = process_object.get("pledge").to_string();
67 process.veil = process_object.get("veil").to_string();
68 process.amount_virtual = process_object.get("amount_virtual").to_u32();
69 process.amount_resident = process_object.get("amount_resident").to_u32();
70 process.amount_shared = process_object.get("amount_shared").to_u32();
71 process.amount_dirty_private = process_object.get("amount_dirty_private").to_u32();
72 process.amount_clean_inode = process_object.get("amount_clean_inode").to_u32();
73 process.amount_purgeable_volatile = process_object.get("amount_purgeable_volatile").to_u32();
74 process.amount_purgeable_nonvolatile = process_object.get("amount_purgeable_nonvolatile").to_u32();
75 process.icon_id = process_object.get("icon_id").to_int();
76
77 auto& thread_array = process_object.get_ptr("threads")->as_array();
78 process.threads.ensure_capacity(thread_array.size());
79 thread_array.for_each([&](auto& value) {
80 auto& thread_object = value.as_object();
81 Core::ThreadStatistics thread;
82 thread.tid = thread_object.get("tid").to_u32();
83 thread.times_scheduled = thread_object.get("times_scheduled").to_u32();
84 thread.name = thread_object.get("name").to_string();
85 thread.state = thread_object.get("state").to_string();
86 thread.ticks = thread_object.get("ticks").to_u32();
87 thread.priority = thread_object.get("priority").to_u32();
88 thread.effective_priority = thread_object.get("effective_priority").to_u32();
89 thread.syscall_count = thread_object.get("syscall_count").to_u32();
90 thread.inode_faults = thread_object.get("inode_faults").to_u32();
91 thread.zero_faults = thread_object.get("zero_faults").to_u32();
92 thread.cow_faults = thread_object.get("cow_faults").to_u32();
93 thread.unix_socket_read_bytes = thread_object.get("unix_socket_read_bytes").to_u32();
94 thread.unix_socket_write_bytes = thread_object.get("unix_socket_write_bytes").to_u32();
95 thread.ipv4_socket_read_bytes = thread_object.get("ipv4_socket_read_bytes").to_u32();
96 thread.ipv4_socket_write_bytes = thread_object.get("ipv4_socket_write_bytes").to_u32();
97 thread.file_read_bytes = thread_object.get("file_read_bytes").to_u32();
98 thread.file_write_bytes = thread_object.get("file_write_bytes").to_u32();
99 process.threads.append(move(thread));
100 });
101
102 // and synthetic data last
103 process.username = username_from_uid(process.uid);
104 map.set(process.pid, process);
105 });
106
107 return map;
108}
109
110String ProcessStatisticsReader::username_from_uid(uid_t uid)
111{
112 if (s_usernames.is_empty()) {
113 setpwent();
114 while (auto* passwd = getpwent())
115 s_usernames.set(passwd->pw_uid, passwd->pw_name);
116 endpwent();
117 }
118
119 auto it = s_usernames.find(uid);
120 if (it != s_usernames.end())
121 return (*it).value;
122 return String::number(uid);
123}
124}