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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
35#ifdef __OpenBSD__
36#include <sys/ioctl.h>
37#include <sys/param.h>
38#define PLEDGENAMES
39#include <sys/pledge.h>
40#include <sys/proc.h>
41#include <sys/resource.h>
42#include <sys/stat.h>
43#include <sys/sysctl.h>
44#include <sys/time.h>
45#include <sys/types.h>
46#include <kvm.h>
47#include <limits.h>
48#include <string.h>
49#endif
50
51namespace Core {
52
53HashMap<uid_t, String> ProcessStatisticsReader::s_usernames;
54
55HashMap<pid_t, Core::ProcessStatistics> ProcessStatisticsReader::get_all()
56{
57 HashMap<pid_t, Core::ProcessStatistics> map;
58
59#ifdef __OpenBSD__
60 kvm_t *kd;
61 struct kinfo_proc *kp;
62 struct kinfo_file *kf;
63 char errbuf[_POSIX2_LINE_MAX];
64 int nentries, i;
65
66 kd = kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, errbuf);
67 kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, sizeof(*kp), &nentries);
68 if (kp == NULL) {
69 perror("kvm_getprocs");
70 ASSERT_NOT_REACHED();
71 }
72
73 for (i = 0; i < nentries; i++) {
74 Core::ProcessStatistics process;
75 char *ttname;
76 int nfiles, j;
77
78 memset(&process, 0, sizeof(process));
79
80 process.pid = kp[i].p_pid;
81 process.pgid = kp[i].p__pgid;
82 process.pgp = kp[i].p_tpgid;
83 process.sid = kp[i].p_sid;
84 process.uid = kp[i].p_uid;
85 process.gid = kp[i].p_gid;
86 process.ppid = kp[i].p_gid;
87
88 if ((kf = kvm_getfiles(kd, KERN_FILE_BYPID, process.pid, sizeof(*kf), &nfiles)) != NULL)
89 process.nfds = nfiles;
90
91 process.name = String(kp[i].p_comm);
92 if ((int)kp[i].p_tdev != (int)NODEV && (ttname = devname(kp[i].p_tdev, S_IFCHR)))
93 process.tty = String(ttname);
94
95 StringBuilder pledge;
96
97 for (j = 0; pledgenames[j].bits != 0; j++) {
98 if (pledgenames[j].bits & kp[i].p_pledge) {
99 if (pledge.length())
100 pledge.append(' ');
101 pledge.append(pledgenames[j].name);
102 }
103 }
104
105 process.pledge = pledge.to_string();
106
107 if (kp[i].p_eflag & EPROC_UNVEIL) {
108 if (kp[i].p_eflag & EPROC_LKUNVEIL)
109 process.veil = String("Locked");
110 else
111 process.veil = String("Dropped");
112 } else
113 process.veil = String("None");
114
115 process.amount_virtual = (kp[i].p_vm_dsize + kp[i].p_vm_ssize + kp[i].p_vm_tsize) * getpagesize();
116 process.amount_resident = kp[i].p_vm_rssize * getpagesize();
117 // no shared info
118
119 Core::ThreadStatistics thread;
120 memset(&thread, 0, sizeof(thread));
121
122 thread.tid = kp[i].p_pid;
123 thread.name = String(kp[i].p_comm);
124
125 switch (kp[i].p_stat) {
126 case SSTOP:
127 thread.state = String("Stopped");
128 break;
129 case SSLEEP:
130 if (kp[i].p_flag & P_SINTR)
131 thread.state = String("Sleeping");
132 else
133 thread.state = String("Disk");
134 break;
135 case SRUN:
136 case SIDL:
137 case SONPROC:
138 thread.state = "Runnable";
139 break;
140 case SDEAD:
141 thread.state = "Dead";
142 break;
143 default:
144 thread.state = "Invalid";
145 }
146
147 process.threads.append(move(thread));
148
149 process.username = username_from_uid(process.uid);
150 map.set(process.pid, process);
151 }
152
153#else
154 auto file = Core::File::construct("/proc/all");
155 if (!file->open(Core::IODevice::ReadOnly)) {
156 fprintf(stderr, "ProcessStatisticsReader: Failed to open /proc/all: %s\n", file->error_string());
157 return {};
158 }
159
160 auto file_contents = file->read_all();
161 auto json = JsonValue::from_string(file_contents);
162 json.as_array().for_each([&](auto& value) {
163 const JsonObject& process_object = value.as_object();
164 Core::ProcessStatistics process;
165
166 // kernel data first
167 process.pid = process_object.get("pid").to_u32();
168 process.pgid = process_object.get("pgid").to_u32();
169 process.pgp = process_object.get("pgp").to_u32();
170 process.sid = process_object.get("sid").to_u32();
171 process.uid = process_object.get("uid").to_u32();
172 process.gid = process_object.get("gid").to_u32();
173 process.ppid = process_object.get("ppid").to_u32();
174 process.nfds = process_object.get("nfds").to_u32();
175 process.name = process_object.get("name").to_string();
176 process.tty = process_object.get("tty").to_string();
177 process.pledge = process_object.get("pledge").to_string();
178 process.veil = process_object.get("veil").to_string();
179 process.amount_virtual = process_object.get("amount_virtual").to_u32();
180 process.amount_resident = process_object.get("amount_resident").to_u32();
181 process.amount_shared = process_object.get("amount_shared").to_u32();
182 process.amount_dirty_private = process_object.get("amount_dirty_private").to_u32();
183 process.amount_clean_inode = process_object.get("amount_clean_inode").to_u32();
184 process.amount_purgeable_volatile = process_object.get("amount_purgeable_volatile").to_u32();
185 process.amount_purgeable_nonvolatile = process_object.get("amount_purgeable_nonvolatile").to_u32();
186 process.icon_id = process_object.get("icon_id").to_int();
187
188 auto& thread_array = process_object.get_ptr("threads")->as_array();
189 process.threads.ensure_capacity(thread_array.size());
190 thread_array.for_each([&](auto& value) {
191 auto& thread_object = value.as_object();
192 Core::ThreadStatistics thread;
193 thread.tid = thread_object.get("tid").to_u32();
194 thread.times_scheduled = thread_object.get("times_scheduled").to_u32();
195 thread.name = thread_object.get("name").to_string();
196 thread.state = thread_object.get("state").to_string();
197 thread.ticks = thread_object.get("ticks").to_u32();
198 thread.priority = thread_object.get("priority").to_u32();
199 thread.effective_priority = thread_object.get("effective_priority").to_u32();
200 thread.syscall_count = thread_object.get("syscall_count").to_u32();
201 thread.inode_faults = thread_object.get("inode_faults").to_u32();
202 thread.zero_faults = thread_object.get("zero_faults").to_u32();
203 thread.cow_faults = thread_object.get("cow_faults").to_u32();
204 thread.unix_socket_read_bytes = thread_object.get("unix_socket_read_bytes").to_u32();
205 thread.unix_socket_write_bytes = thread_object.get("unix_socket_write_bytes").to_u32();
206 thread.ipv4_socket_read_bytes = thread_object.get("ipv4_socket_read_bytes").to_u32();
207 thread.ipv4_socket_write_bytes = thread_object.get("ipv4_socket_write_bytes").to_u32();
208 thread.file_read_bytes = thread_object.get("file_read_bytes").to_u32();
209 thread.file_write_bytes = thread_object.get("file_write_bytes").to_u32();
210 process.threads.append(move(thread));
211 });
212
213 // and synthetic data last
214 process.username = username_from_uid(process.uid);
215 map.set(process.pid, process);
216 });
217#endif
218
219 return map;
220}
221
222String ProcessStatisticsReader::username_from_uid(uid_t uid)
223{
224 if (s_usernames.is_empty()) {
225 setpwent();
226 while (auto* passwd = getpwent())
227 s_usernames.set(passwd->pw_uid, passwd->pw_name);
228 endpwent();
229 }
230
231 auto it = s_usernames.find(uid);
232 if (it != s_usernames.end())
233 return (*it).value;
234 return String::number(uid);
235}
236}