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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
4927fcae LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
4927fcae LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
4927fcae | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
4927fcae LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
4927fcae LP |
21 | #include <errno.h> |
22 | #include <string.h> | |
4927fcae LP |
23 | #include <unistd.h> |
24 | ||
349cc4a5 | 25 | #if HAVE_AUDIT |
830f6caa LP |
26 | #include <libaudit.h> |
27 | #endif | |
28 | ||
89456fce TG |
29 | #include "sd-bus.h" |
30 | ||
b5efdb8a LP |
31 | #include "alloc-util.h" |
32 | #include "bus-error.h" | |
33 | #include "bus-util.h" | |
f97b34a6 | 34 | #include "format-util.h" |
4927fcae LP |
35 | #include "log.h" |
36 | #include "macro.h" | |
df0ff127 | 37 | #include "process-util.h" |
4927fcae | 38 | #include "special.h" |
dfc7f594 | 39 | #include "strv.h" |
e7fb33ff | 40 | #include "unit-name.h" |
b5efdb8a LP |
41 | #include "util.h" |
42 | #include "utmp-wtmp.h" | |
4927fcae LP |
43 | |
44 | typedef struct Context { | |
89456fce | 45 | sd_bus *bus; |
349cc4a5 | 46 | #if HAVE_AUDIT |
4927fcae LP |
47 | int audit_fd; |
48 | #endif | |
49 | } Context; | |
50 | ||
51 | static usec_t get_startup_time(Context *c) { | |
4afd3348 | 52 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
47c649b5 | 53 | usec_t t = 0; |
89456fce | 54 | int r; |
4927fcae | 55 | |
4927fcae LP |
56 | assert(c); |
57 | ||
47c649b5 | 58 | r = sd_bus_get_property_trivial( |
436ddded SP |
59 | c->bus, |
60 | "org.freedesktop.systemd1", | |
61 | "/org/freedesktop/systemd1", | |
89456fce | 62 | "org.freedesktop.systemd1.Manager", |
47c649b5 LP |
63 | "UserspaceTimestamp", |
64 | &error, | |
65 | 't', &t); | |
89456fce | 66 | if (r < 0) { |
f0960da0 | 67 | log_error_errno(r, "Failed to get timestamp: %s", bus_error_message(&error, r)); |
47c649b5 | 68 | return 0; |
4927fcae LP |
69 | } |
70 | ||
4927fcae LP |
71 | return t; |
72 | } | |
73 | ||
74 | static int get_current_runlevel(Context *c) { | |
75 | static const struct { | |
76 | const int runlevel; | |
77 | const char *special; | |
78 | } table[] = { | |
79 | /* The first target of this list that is active or has | |
ee2083d5 LP |
80 | * a job scheduled wins. We prefer runlevels 5 and 3 |
81 | * here over the others, since these are the main | |
82 | * runlevels used on Fedora. It might make sense to | |
83 | * change the order on some distributions. */ | |
d5d8429a LP |
84 | { '5', SPECIAL_GRAPHICAL_TARGET }, |
85 | { '3', SPECIAL_MULTI_USER_TARGET }, | |
86 | { '1', SPECIAL_RESCUE_TARGET }, | |
4927fcae | 87 | }; |
4927fcae | 88 | |
4afd3348 | 89 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
89456fce | 90 | int r; |
4927fcae | 91 | unsigned i; |
4927fcae LP |
92 | |
93 | assert(c); | |
94 | ||
4927fcae | 95 | for (i = 0; i < ELEMENTSOF(table); i++) { |
e7fb33ff | 96 | _cleanup_free_ char *state = NULL, *path = NULL; |
4927fcae | 97 | |
e7fb33ff LP |
98 | path = unit_dbus_path_from_name(table[i].special); |
99 | if (!path) | |
100 | return log_oom(); | |
89456fce | 101 | |
47c649b5 | 102 | r = sd_bus_get_property_string( |
436ddded SP |
103 | c->bus, |
104 | "org.freedesktop.systemd1", | |
105 | path, | |
47c649b5 LP |
106 | "org.freedesktop.systemd1.Unit", |
107 | "ActiveState", | |
89456fce | 108 | &error, |
47c649b5 | 109 | &state); |
f0960da0 LP |
110 | if (r < 0) |
111 | return log_warning_errno(r, "Failed to get state: %s", bus_error_message(&error, r)); | |
4927fcae | 112 | |
dfc7f594 | 113 | if (STR_IN_SET(state, "active", "reloading")) |
89456fce | 114 | return table[i].runlevel; |
4927fcae LP |
115 | } |
116 | ||
89456fce | 117 | return 0; |
4927fcae LP |
118 | } |
119 | ||
120 | static int on_reboot(Context *c) { | |
121 | int r = 0, q; | |
122 | usec_t t; | |
123 | ||
124 | assert(c); | |
125 | ||
126 | /* We finished start-up, so let's write the utmp | |
127 | * record and send the audit msg */ | |
128 | ||
349cc4a5 | 129 | #if HAVE_AUDIT |
4927fcae | 130 | if (c->audit_fd >= 0) |
0aa281df | 131 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && |
44785992 | 132 | errno != EPERM) { |
f0960da0 | 133 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
134 | } |
135 | #endif | |
136 | ||
137 | /* If this call fails it will return 0, which | |
138 | * utmp_put_reboot() will then fix to the current time */ | |
139 | t = get_startup_time(c); | |
140 | ||
1cea22a5 LP |
141 | q = utmp_put_reboot(t); |
142 | if (q < 0) { | |
da927ba9 | 143 | log_error_errno(q, "Failed to write utmp record: %m"); |
4927fcae LP |
144 | r = q; |
145 | } | |
146 | ||
147 | return r; | |
148 | } | |
149 | ||
150 | static int on_shutdown(Context *c) { | |
151 | int r = 0, q; | |
152 | ||
153 | assert(c); | |
154 | ||
155 | /* We started shut-down, so let's write the utmp | |
156 | * record and send the audit msg */ | |
157 | ||
349cc4a5 | 158 | #if HAVE_AUDIT |
4927fcae | 159 | if (c->audit_fd >= 0) |
0aa281df | 160 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && |
44785992 | 161 | errno != EPERM) { |
f0960da0 | 162 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
163 | } |
164 | #endif | |
165 | ||
1cea22a5 LP |
166 | q = utmp_put_shutdown(); |
167 | if (q < 0) { | |
da927ba9 | 168 | log_error_errno(q, "Failed to write utmp record: %m"); |
4927fcae LP |
169 | r = q; |
170 | } | |
171 | ||
172 | return r; | |
173 | } | |
174 | ||
175 | static int on_runlevel(Context *c) { | |
176 | int r = 0, q, previous, runlevel; | |
177 | ||
178 | assert(c); | |
179 | ||
180 | /* We finished changing runlevel, so let's write the | |
181 | * utmp record and send the audit msg */ | |
182 | ||
183 | /* First, get last runlevel */ | |
1cea22a5 | 184 | q = utmp_get_runlevel(&previous, NULL); |
4927fcae | 185 | |
e7fb33ff | 186 | if (q < 0) { |
4c701096 | 187 | if (!IN_SET(q, -ESRCH, -ENOENT)) |
f647962d | 188 | return log_error_errno(q, "Failed to get current runlevel: %m"); |
4927fcae | 189 | |
4927fcae LP |
190 | previous = 0; |
191 | } | |
192 | ||
830f6caa | 193 | /* Secondly, get new runlevel */ |
1cea22a5 | 194 | runlevel = get_current_runlevel(c); |
e7fb33ff | 195 | |
1cea22a5 | 196 | if (runlevel < 0) |
4927fcae LP |
197 | return runlevel; |
198 | ||
199 | if (previous == runlevel) | |
200 | return 0; | |
201 | ||
349cc4a5 | 202 | #if HAVE_AUDIT |
4927fcae | 203 | if (c->audit_fd >= 0) { |
1cea22a5 | 204 | _cleanup_free_ char *s = NULL; |
4927fcae | 205 | |
cd6d0a45 LP |
206 | if (asprintf(&s, "old-level=%c new-level=%c", |
207 | previous > 0 ? previous : 'N', | |
208 | runlevel > 0 ? runlevel : 'N') < 0) | |
1cea22a5 | 209 | return log_oom(); |
4927fcae | 210 | |
ece174c5 | 211 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && errno != EPERM) |
f0960da0 | 212 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
213 | } |
214 | #endif | |
215 | ||
1cea22a5 | 216 | q = utmp_put_runlevel(runlevel, previous); |
4c701096 | 217 | if (q < 0 && !IN_SET(q, -ESRCH, -ENOENT)) { |
da927ba9 | 218 | log_error_errno(q, "Failed to write utmp record: %m"); |
1cea22a5 | 219 | r = q; |
4927fcae LP |
220 | } |
221 | ||
222 | return r; | |
223 | } | |
224 | ||
225 | int main(int argc, char *argv[]) { | |
1cea22a5 | 226 | Context c = { |
349cc4a5 | 227 | #if HAVE_AUDIT |
1cea22a5 | 228 | .audit_fd = -1 |
4927fcae | 229 | #endif |
1cea22a5 LP |
230 | }; |
231 | int r; | |
4927fcae | 232 | |
cd6d0a45 LP |
233 | if (getppid() != 1) { |
234 | log_error("This program should be invoked by init only."); | |
22f4096c | 235 | return EXIT_FAILURE; |
cd6d0a45 | 236 | } |
4927fcae LP |
237 | |
238 | if (argc != 2) { | |
239 | log_error("This program requires one argument."); | |
22f4096c | 240 | return EXIT_FAILURE; |
4927fcae LP |
241 | } |
242 | ||
4cfa2c99 | 243 | log_set_target(LOG_TARGET_AUTO); |
4927fcae | 244 | log_parse_environment(); |
2396fb04 | 245 | log_open(); |
4927fcae | 246 | |
4c12626c LP |
247 | umask(0022); |
248 | ||
349cc4a5 | 249 | #if HAVE_AUDIT |
1cea22a5 LP |
250 | /* If the kernel lacks netlink or audit support, |
251 | * don't worry about it. */ | |
252 | c.audit_fd = audit_open(); | |
4c701096 | 253 | if (c.audit_fd < 0 && !IN_SET(errno, EAFNOSUPPORT, EPROTONOSUPPORT)) |
56f64d95 | 254 | log_error_errno(errno, "Failed to connect to audit log: %m"); |
4927fcae | 255 | #endif |
266f3e26 | 256 | r = bus_connect_system_systemd(&c.bus); |
89456fce | 257 | if (r < 0) { |
da927ba9 | 258 | log_error_errno(r, "Failed to get D-Bus connection: %m"); |
4927fcae LP |
259 | r = -EIO; |
260 | goto finish; | |
261 | } | |
262 | ||
df0ff127 | 263 | log_debug("systemd-update-utmp running as pid "PID_FMT, getpid_cached()); |
4927fcae LP |
264 | |
265 | if (streq(argv[1], "reboot")) | |
266 | r = on_reboot(&c); | |
267 | else if (streq(argv[1], "shutdown")) | |
268 | r = on_shutdown(&c); | |
269 | else if (streq(argv[1], "runlevel")) | |
270 | r = on_runlevel(&c); | |
271 | else { | |
272 | log_error("Unknown command %s", argv[1]); | |
273 | r = -EINVAL; | |
274 | } | |
275 | ||
df0ff127 | 276 | log_debug("systemd-update-utmp stopped as pid "PID_FMT, getpid_cached()); |
4927fcae | 277 | |
cd6d0a45 | 278 | finish: |
349cc4a5 | 279 | #if HAVE_AUDIT |
4927fcae LP |
280 | if (c.audit_fd >= 0) |
281 | audit_close(c.audit_fd); | |
282 | #endif | |
283 | ||
f0792aae | 284 | sd_bus_flush_close_unref(c.bus); |
22f4096c | 285 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4927fcae | 286 | } |