]>
Commit | Line | Data |
---|---|---|
4927fcae LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
4927fcae LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
4927fcae | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
4927fcae LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
4927fcae LP |
20 | #include <errno.h> |
21 | #include <string.h> | |
4927fcae LP |
22 | #include <unistd.h> |
23 | ||
830f6caa LP |
24 | #ifdef HAVE_AUDIT |
25 | #include <libaudit.h> | |
26 | #endif | |
27 | ||
89456fce TG |
28 | #include "sd-bus.h" |
29 | ||
b5efdb8a LP |
30 | #include "alloc-util.h" |
31 | #include "bus-error.h" | |
32 | #include "bus-util.h" | |
33 | #include "formats-util.h" | |
4927fcae LP |
34 | #include "log.h" |
35 | #include "macro.h" | |
4927fcae | 36 | #include "special.h" |
e7fb33ff | 37 | #include "unit-name.h" |
b5efdb8a LP |
38 | #include "util.h" |
39 | #include "utmp-wtmp.h" | |
4927fcae LP |
40 | |
41 | typedef struct Context { | |
89456fce | 42 | sd_bus *bus; |
4927fcae LP |
43 | #ifdef HAVE_AUDIT |
44 | int audit_fd; | |
45 | #endif | |
46 | } Context; | |
47 | ||
48 | static usec_t get_startup_time(Context *c) { | |
4afd3348 | 49 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
47c649b5 | 50 | usec_t t = 0; |
89456fce | 51 | int r; |
4927fcae | 52 | |
4927fcae LP |
53 | assert(c); |
54 | ||
47c649b5 | 55 | r = sd_bus_get_property_trivial( |
436ddded SP |
56 | c->bus, |
57 | "org.freedesktop.systemd1", | |
58 | "/org/freedesktop/systemd1", | |
89456fce | 59 | "org.freedesktop.systemd1.Manager", |
47c649b5 LP |
60 | "UserspaceTimestamp", |
61 | &error, | |
62 | 't', &t); | |
89456fce | 63 | if (r < 0) { |
f0960da0 | 64 | log_error_errno(r, "Failed to get timestamp: %s", bus_error_message(&error, r)); |
47c649b5 | 65 | return 0; |
4927fcae LP |
66 | } |
67 | ||
4927fcae LP |
68 | return t; |
69 | } | |
70 | ||
71 | static int get_current_runlevel(Context *c) { | |
72 | static const struct { | |
73 | const int runlevel; | |
74 | const char *special; | |
75 | } table[] = { | |
76 | /* The first target of this list that is active or has | |
ee2083d5 LP |
77 | * a job scheduled wins. We prefer runlevels 5 and 3 |
78 | * here over the others, since these are the main | |
79 | * runlevels used on Fedora. It might make sense to | |
80 | * change the order on some distributions. */ | |
d5d8429a LP |
81 | { '5', SPECIAL_GRAPHICAL_TARGET }, |
82 | { '3', SPECIAL_MULTI_USER_TARGET }, | |
83 | { '1', SPECIAL_RESCUE_TARGET }, | |
4927fcae | 84 | }; |
4927fcae | 85 | |
4afd3348 | 86 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
89456fce | 87 | int r; |
4927fcae | 88 | unsigned i; |
4927fcae LP |
89 | |
90 | assert(c); | |
91 | ||
4927fcae | 92 | for (i = 0; i < ELEMENTSOF(table); i++) { |
e7fb33ff | 93 | _cleanup_free_ char *state = NULL, *path = NULL; |
4927fcae | 94 | |
e7fb33ff LP |
95 | path = unit_dbus_path_from_name(table[i].special); |
96 | if (!path) | |
97 | return log_oom(); | |
89456fce | 98 | |
47c649b5 | 99 | r = sd_bus_get_property_string( |
436ddded SP |
100 | c->bus, |
101 | "org.freedesktop.systemd1", | |
102 | path, | |
47c649b5 LP |
103 | "org.freedesktop.systemd1.Unit", |
104 | "ActiveState", | |
89456fce | 105 | &error, |
47c649b5 | 106 | &state); |
f0960da0 LP |
107 | if (r < 0) |
108 | return log_warning_errno(r, "Failed to get state: %s", bus_error_message(&error, r)); | |
4927fcae | 109 | |
4927fcae | 110 | if (streq(state, "active") || streq(state, "reloading")) |
89456fce | 111 | return table[i].runlevel; |
4927fcae LP |
112 | } |
113 | ||
89456fce | 114 | return 0; |
4927fcae LP |
115 | } |
116 | ||
117 | static int on_reboot(Context *c) { | |
118 | int r = 0, q; | |
119 | usec_t t; | |
120 | ||
121 | assert(c); | |
122 | ||
123 | /* We finished start-up, so let's write the utmp | |
124 | * record and send the audit msg */ | |
125 | ||
126 | #ifdef HAVE_AUDIT | |
127 | if (c->audit_fd >= 0) | |
0aa281df | 128 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && |
44785992 | 129 | errno != EPERM) { |
f0960da0 | 130 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
131 | } |
132 | #endif | |
133 | ||
134 | /* If this call fails it will return 0, which | |
135 | * utmp_put_reboot() will then fix to the current time */ | |
136 | t = get_startup_time(c); | |
137 | ||
1cea22a5 LP |
138 | q = utmp_put_reboot(t); |
139 | if (q < 0) { | |
da927ba9 | 140 | log_error_errno(q, "Failed to write utmp record: %m"); |
4927fcae LP |
141 | r = q; |
142 | } | |
143 | ||
144 | return r; | |
145 | } | |
146 | ||
147 | static int on_shutdown(Context *c) { | |
148 | int r = 0, q; | |
149 | ||
150 | assert(c); | |
151 | ||
152 | /* We started shut-down, so let's write the utmp | |
153 | * record and send the audit msg */ | |
154 | ||
155 | #ifdef HAVE_AUDIT | |
156 | if (c->audit_fd >= 0) | |
0aa281df | 157 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && |
44785992 | 158 | errno != EPERM) { |
f0960da0 | 159 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
160 | } |
161 | #endif | |
162 | ||
1cea22a5 LP |
163 | q = utmp_put_shutdown(); |
164 | if (q < 0) { | |
da927ba9 | 165 | log_error_errno(q, "Failed to write utmp record: %m"); |
4927fcae LP |
166 | r = q; |
167 | } | |
168 | ||
169 | return r; | |
170 | } | |
171 | ||
172 | static int on_runlevel(Context *c) { | |
173 | int r = 0, q, previous, runlevel; | |
174 | ||
175 | assert(c); | |
176 | ||
177 | /* We finished changing runlevel, so let's write the | |
178 | * utmp record and send the audit msg */ | |
179 | ||
180 | /* First, get last runlevel */ | |
1cea22a5 | 181 | q = utmp_get_runlevel(&previous, NULL); |
4927fcae | 182 | |
e7fb33ff | 183 | if (q < 0) { |
f647962d MS |
184 | if (q != -ESRCH && q != -ENOENT) |
185 | return log_error_errno(q, "Failed to get current runlevel: %m"); | |
4927fcae | 186 | |
4927fcae LP |
187 | previous = 0; |
188 | } | |
189 | ||
830f6caa | 190 | /* Secondly, get new runlevel */ |
1cea22a5 | 191 | runlevel = get_current_runlevel(c); |
e7fb33ff | 192 | |
1cea22a5 | 193 | if (runlevel < 0) |
4927fcae LP |
194 | return runlevel; |
195 | ||
196 | if (previous == runlevel) | |
197 | return 0; | |
198 | ||
199 | #ifdef HAVE_AUDIT | |
200 | if (c->audit_fd >= 0) { | |
1cea22a5 | 201 | _cleanup_free_ char *s = NULL; |
4927fcae | 202 | |
cd6d0a45 LP |
203 | if (asprintf(&s, "old-level=%c new-level=%c", |
204 | previous > 0 ? previous : 'N', | |
205 | runlevel > 0 ? runlevel : 'N') < 0) | |
1cea22a5 | 206 | return log_oom(); |
4927fcae | 207 | |
ece174c5 | 208 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && errno != EPERM) |
f0960da0 | 209 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
210 | } |
211 | #endif | |
212 | ||
1cea22a5 LP |
213 | q = utmp_put_runlevel(runlevel, previous); |
214 | if (q < 0 && q != -ESRCH && q != -ENOENT) { | |
da927ba9 | 215 | log_error_errno(q, "Failed to write utmp record: %m"); |
1cea22a5 | 216 | r = q; |
4927fcae LP |
217 | } |
218 | ||
219 | return r; | |
220 | } | |
221 | ||
222 | int main(int argc, char *argv[]) { | |
1cea22a5 | 223 | Context c = { |
4927fcae | 224 | #ifdef HAVE_AUDIT |
1cea22a5 | 225 | .audit_fd = -1 |
4927fcae | 226 | #endif |
1cea22a5 LP |
227 | }; |
228 | int r; | |
4927fcae | 229 | |
cd6d0a45 LP |
230 | if (getppid() != 1) { |
231 | log_error("This program should be invoked by init only."); | |
22f4096c | 232 | return EXIT_FAILURE; |
cd6d0a45 | 233 | } |
4927fcae LP |
234 | |
235 | if (argc != 2) { | |
236 | log_error("This program requires one argument."); | |
22f4096c | 237 | return EXIT_FAILURE; |
4927fcae LP |
238 | } |
239 | ||
4cfa2c99 | 240 | log_set_target(LOG_TARGET_AUTO); |
4927fcae | 241 | log_parse_environment(); |
2396fb04 | 242 | log_open(); |
4927fcae | 243 | |
4c12626c LP |
244 | umask(0022); |
245 | ||
4927fcae | 246 | #ifdef HAVE_AUDIT |
1cea22a5 LP |
247 | /* If the kernel lacks netlink or audit support, |
248 | * don't worry about it. */ | |
249 | c.audit_fd = audit_open(); | |
250 | if (c.audit_fd < 0 && errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT) | |
56f64d95 | 251 | log_error_errno(errno, "Failed to connect to audit log: %m"); |
4927fcae | 252 | #endif |
266f3e26 | 253 | r = bus_connect_system_systemd(&c.bus); |
89456fce | 254 | if (r < 0) { |
da927ba9 | 255 | log_error_errno(r, "Failed to get D-Bus connection: %m"); |
4927fcae LP |
256 | r = -EIO; |
257 | goto finish; | |
258 | } | |
259 | ||
de0671ee | 260 | log_debug("systemd-update-utmp running as pid "PID_FMT, getpid()); |
4927fcae LP |
261 | |
262 | if (streq(argv[1], "reboot")) | |
263 | r = on_reboot(&c); | |
264 | else if (streq(argv[1], "shutdown")) | |
265 | r = on_shutdown(&c); | |
266 | else if (streq(argv[1], "runlevel")) | |
267 | r = on_runlevel(&c); | |
268 | else { | |
269 | log_error("Unknown command %s", argv[1]); | |
270 | r = -EINVAL; | |
271 | } | |
272 | ||
de0671ee | 273 | log_debug("systemd-update-utmp stopped as pid "PID_FMT, getpid()); |
4927fcae | 274 | |
cd6d0a45 | 275 | finish: |
4927fcae LP |
276 | #ifdef HAVE_AUDIT |
277 | if (c.audit_fd >= 0) | |
278 | audit_close(c.audit_fd); | |
279 | #endif | |
280 | ||
f0792aae | 281 | sd_bus_flush_close_unref(c.bus); |
22f4096c | 282 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
4927fcae | 283 | } |