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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
4927fcae | 2 | |
4927fcae LP |
3 | #include <errno.h> |
4 | #include <string.h> | |
ca78ad1d ZJS |
5 | #include <sys/stat.h> |
6 | #include <sys/types.h> | |
4927fcae LP |
7 | #include <unistd.h> |
8 | ||
349cc4a5 | 9 | #if HAVE_AUDIT |
830f6caa LP |
10 | #include <libaudit.h> |
11 | #endif | |
12 | ||
89456fce TG |
13 | #include "sd-bus.h" |
14 | ||
b5efdb8a LP |
15 | #include "alloc-util.h" |
16 | #include "bus-error.h" | |
17 | #include "bus-util.h" | |
f97b34a6 | 18 | #include "format-util.h" |
4927fcae LP |
19 | #include "log.h" |
20 | #include "macro.h" | |
72682957 | 21 | #include "main-func.h" |
df0ff127 | 22 | #include "process-util.h" |
4927fcae | 23 | #include "special.h" |
ecfd9a99 | 24 | #include "stdio-util.h" |
dfc7f594 | 25 | #include "strv.h" |
e7fb33ff | 26 | #include "unit-name.h" |
b5efdb8a LP |
27 | #include "util.h" |
28 | #include "utmp-wtmp.h" | |
4927fcae LP |
29 | |
30 | typedef struct Context { | |
89456fce | 31 | sd_bus *bus; |
349cc4a5 | 32 | #if HAVE_AUDIT |
4927fcae LP |
33 | int audit_fd; |
34 | #endif | |
35 | } Context; | |
36 | ||
3664cbab YW |
37 | static void context_clear(Context *c) { |
38 | assert(c); | |
39 | ||
40 | c->bus = sd_bus_flush_close_unref(c->bus); | |
41 | #if HAVE_AUDIT | |
42 | if (c->audit_fd >= 0) | |
43 | audit_close(c->audit_fd); | |
44 | c->audit_fd = -1; | |
45 | #endif | |
46 | } | |
47 | ||
4927fcae | 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 | |
dfc7f594 | 110 | if (STR_IN_SET(state, "active", "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 | ||
349cc4a5 | 126 | #if HAVE_AUDIT |
4927fcae | 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 | ||
349cc4a5 | 155 | #if HAVE_AUDIT |
4927fcae | 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) { |
4c701096 | 184 | if (!IN_SET(q, -ESRCH, -ENOENT)) |
f647962d | 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 LP |
191 | runlevel = get_current_runlevel(c); |
192 | if (runlevel < 0) | |
4927fcae | 193 | return runlevel; |
e57cd3fb TR |
194 | if (runlevel == 0) |
195 | return log_warning("Failed to get new runlevel, utmp update skipped."); | |
196 | ||
4927fcae LP |
197 | if (previous == runlevel) |
198 | return 0; | |
199 | ||
349cc4a5 | 200 | #if HAVE_AUDIT |
4927fcae | 201 | if (c->audit_fd >= 0) { |
ecfd9a99 | 202 | char s[STRLEN("old-level=_ new-level=_") + 1]; |
4927fcae | 203 | |
ecfd9a99 ZJS |
204 | xsprintf(s, "old-level=%c new-level=%c", |
205 | previous > 0 ? previous : 'N', | |
206 | runlevel); | |
4927fcae | 207 | |
ecfd9a99 ZJS |
208 | if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, |
209 | "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 && errno != EPERM) | |
f0960da0 | 210 | r = log_error_errno(errno, "Failed to send audit message: %m"); |
4927fcae LP |
211 | } |
212 | #endif | |
213 | ||
1cea22a5 | 214 | q = utmp_put_runlevel(runlevel, previous); |
ecfd9a99 ZJS |
215 | if (q < 0 && !IN_SET(q, -ESRCH, -ENOENT)) |
216 | return log_error_errno(q, "Failed to write utmp record: %m"); | |
4927fcae LP |
217 | |
218 | return r; | |
219 | } | |
220 | ||
72682957 | 221 | static int run(int argc, char *argv[]) { |
3664cbab | 222 | _cleanup_(context_clear) Context c = { |
349cc4a5 | 223 | #if HAVE_AUDIT |
1cea22a5 | 224 | .audit_fd = -1 |
4927fcae | 225 | #endif |
1cea22a5 LP |
226 | }; |
227 | int r; | |
4927fcae | 228 | |
72682957 ZJS |
229 | if (getppid() != 1) |
230 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
231 | "This program should be invoked by init only."); | |
232 | if (argc != 2) | |
233 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
234 | "This program requires one argument."); | |
4927fcae | 235 | |
6bf3c61c | 236 | log_setup_service(); |
4927fcae | 237 | |
4c12626c LP |
238 | umask(0022); |
239 | ||
349cc4a5 | 240 | #if HAVE_AUDIT |
72682957 | 241 | /* If the kernel lacks netlink or audit support, don't worry about it. */ |
1cea22a5 | 242 | c.audit_fd = audit_open(); |
72682957 ZJS |
243 | if (c.audit_fd < 0) |
244 | log_full_errno(IN_SET(errno, EAFNOSUPPORT, EPROTONOSUPPORT) ? LOG_DEBUG : LOG_ERR, | |
245 | errno, "Failed to connect to audit log: %m"); | |
4927fcae | 246 | #endif |
266f3e26 | 247 | r = bus_connect_system_systemd(&c.bus); |
72682957 ZJS |
248 | if (r < 0) |
249 | return log_error_errno(r, "Failed to get D-Bus connection: %m"); | |
4927fcae LP |
250 | |
251 | if (streq(argv[1], "reboot")) | |
72682957 ZJS |
252 | return on_reboot(&c); |
253 | if (streq(argv[1], "shutdown")) | |
254 | return on_shutdown(&c); | |
255 | if (streq(argv[1], "runlevel")) | |
256 | return on_runlevel(&c); | |
257 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown command %s", argv[1]); | |
4927fcae | 258 | } |
72682957 ZJS |
259 | |
260 | DEFINE_MAIN_FUNCTION(run); |