1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <sys/types.h>
28 #include <dbus/dbus.h>
38 #include "utmp-wtmp.h"
39 #include "dbus-common.h"
41 typedef struct Context
{
48 static usec_t
get_startup_time(Context
*c
) {
50 *interface
= "org.freedesktop.systemd1.Manager",
51 *property
= "StartupTimestamp";
55 DBusMessage
*m
= NULL
, *reply
= NULL
;
56 DBusMessageIter iter
, sub
;
58 dbus_error_init(&error
);
62 if (!(m
= dbus_message_new_method_call(
63 "org.freedesktop.systemd1",
64 "/org/freedesktop/systemd1",
65 "org.freedesktop.DBus.Properties",
67 log_error("Could not allocate message.");
71 if (!dbus_message_append_args(m
,
72 DBUS_TYPE_STRING
, &interface
,
73 DBUS_TYPE_STRING
, &property
,
75 log_error("Could not append arguments to message.");
79 if (!(reply
= dbus_connection_send_with_reply_and_block(c
->bus
, m
, -1, &error
))) {
80 log_error("Failed to send command: %s", bus_error_message(&error
));
84 if (!dbus_message_iter_init(reply
, &iter
) ||
85 dbus_message_iter_get_arg_type(&iter
) != DBUS_TYPE_VARIANT
) {
86 log_error("Failed to parse reply.");
90 dbus_message_iter_recurse(&iter
, &sub
);
92 if (dbus_message_iter_get_arg_type(&sub
) != DBUS_TYPE_UINT64
) {
93 log_error("Failed to parse reply.");
97 dbus_message_iter_get_basic(&sub
, &t
);
101 dbus_message_unref(m
);
104 dbus_message_unref(reply
);
106 dbus_error_free(&error
);
111 static int get_current_runlevel(Context
*c
) {
112 static const struct {
116 /* The first target of this list that is active or has
117 * a job scheduled wins. We prefer runlevels 5 and 3
118 * here over the others, since these are the main
119 * runlevels used on Fedora. It might make sense to
120 * change the order on some distributions. */
121 { '5', SPECIAL_RUNLEVEL5_TARGET
},
122 { '3', SPECIAL_RUNLEVEL3_TARGET
},
123 { '4', SPECIAL_RUNLEVEL4_TARGET
},
124 { '2', SPECIAL_RUNLEVEL2_TARGET
},
125 { 'S', SPECIAL_RESCUE_TARGET
},
128 *interface
= "org.freedesktop.systemd1.Unit",
129 *property
= "ActiveState";
131 DBusMessage
*m
= NULL
, *reply
= NULL
;
138 dbus_error_init(&error
);
140 for (i
= 0; i
< ELEMENTSOF(table
); i
++) {
141 const char *path
= NULL
, *state
;
142 DBusMessageIter iter
, sub
;
144 if (!(m
= dbus_message_new_method_call(
145 "org.freedesktop.systemd1",
146 "/org/freedesktop/systemd1",
147 "org.freedesktop.systemd1.Manager",
149 log_error("Could not allocate message.");
154 if (!dbus_message_append_args(m
,
155 DBUS_TYPE_STRING
, &table
[i
].special
,
156 DBUS_TYPE_INVALID
)) {
157 log_error("Could not append arguments to message.");
162 if (!(reply
= dbus_connection_send_with_reply_and_block(c
->bus
, m
, -1, &error
))) {
163 dbus_error_free(&error
);
167 if (!dbus_message_get_args(reply
, &error
,
168 DBUS_TYPE_OBJECT_PATH
, &path
,
169 DBUS_TYPE_INVALID
)) {
170 log_error("Failed to parse reply: %s", bus_error_message(&error
));
175 dbus_message_unref(m
);
176 if (!(m
= dbus_message_new_method_call(
177 "org.freedesktop.systemd1",
179 "org.freedesktop.DBus.Properties",
181 log_error("Could not allocate message.");
186 if (!dbus_message_append_args(m
,
187 DBUS_TYPE_STRING
, &interface
,
188 DBUS_TYPE_STRING
, &property
,
189 DBUS_TYPE_INVALID
)) {
190 log_error("Could not append arguments to message.");
195 dbus_message_unref(reply
);
196 if (!(reply
= dbus_connection_send_with_reply_and_block(c
->bus
, m
, -1, &error
))) {
197 log_error("Failed to send command: %s", bus_error_message(&error
));
202 if (!dbus_message_iter_init(reply
, &iter
) ||
203 dbus_message_iter_get_arg_type(&iter
) != DBUS_TYPE_VARIANT
) {
204 log_error("Failed to parse reply.");
209 dbus_message_iter_recurse(&iter
, &sub
);
211 if (dbus_message_iter_get_arg_type(&sub
) != DBUS_TYPE_STRING
) {
212 log_error("Failed to parse reply.");
217 dbus_message_iter_get_basic(&sub
, &state
);
219 if (streq(state
, "active") || streq(state
, "reloading"))
220 r
= table
[i
].runlevel
;
222 dbus_message_unref(m
);
223 dbus_message_unref(reply
);
232 dbus_message_unref(m
);
235 dbus_message_unref(reply
);
237 dbus_error_free(&error
);
242 static int on_reboot(Context
*c
) {
248 /* We finished start-up, so let's write the utmp
249 * record and send the audit msg */
252 if (c
->audit_fd
>= 0)
253 if (audit_log_user_message(c
->audit_fd
, AUDIT_SYSTEM_BOOT
, "init", NULL
, NULL
, NULL
, 1) < 0) {
254 log_error("Failed to send audit message: %m");
259 /* If this call fails it will return 0, which
260 * utmp_put_reboot() will then fix to the current time */
261 t
= get_startup_time(c
);
263 if ((q
= utmp_put_reboot(t
)) < 0) {
264 log_error("Failed to write utmp record: %s", strerror(-q
));
271 static int on_shutdown(Context
*c
) {
276 /* We started shut-down, so let's write the utmp
277 * record and send the audit msg */
280 if (c
->audit_fd
>= 0)
281 if (audit_log_user_message(c
->audit_fd
, AUDIT_SYSTEM_SHUTDOWN
, "init", NULL
, NULL
, NULL
, 1) < 0) {
282 log_error("Failed to send audit message: %m");
287 if ((q
= utmp_put_shutdown()) < 0) {
288 log_error("Failed to write utmp record: %s", strerror(-q
));
295 static int on_runlevel(Context
*c
) {
296 int r
= 0, q
, previous
, runlevel
;
300 /* We finished changing runlevel, so let's write the
301 * utmp record and send the audit msg */
303 /* First, get last runlevel */
304 if ((q
= utmp_get_runlevel(&previous
, NULL
)) < 0) {
306 if (q
!= -ESRCH
&& q
!= -ENOENT
) {
307 log_error("Failed to get current runlevel: %s", strerror(-q
));
311 /* Hmm, we didn't find any runlevel, that means we
312 * have been rebooted */
317 /* Secondly, get new runlevel */
318 if ((runlevel
= get_current_runlevel(c
)) < 0)
321 if (previous
== runlevel
)
325 if (c
->audit_fd
>= 0) {
328 if (asprintf(&s
, "old-level=%c new-level=%c",
329 previous
> 0 ? previous
: 'N',
330 runlevel
> 0 ? runlevel
: 'N') < 0)
333 if (audit_log_user_message(c
->audit_fd
, AUDIT_SYSTEM_RUNLEVEL
, s
, NULL
, NULL
, NULL
, 1) < 0) {
334 log_error("Failed to send audit message: %m");
342 if ((q
= utmp_put_runlevel(runlevel
, previous
)) < 0) {
343 log_error("Failed to write utmp record: %s", strerror(-q
));
350 int main(int argc
, char *argv
[]) {
355 dbus_error_init(&error
);
362 if (getppid() != 1) {
363 log_error("This program should be invoked by init only.");
368 log_error("This program requires one argument.");
372 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG
);
373 log_parse_environment();
379 if ((c
.audit_fd
= audit_open()) < 0 &&
380 /* If the kernel lacks netlink or audit support,
381 * don't worry about it. */
382 errno
!= EAFNOSUPPORT
&& errno
!= EPROTONOSUPPORT
)
383 log_error("Failed to connect to audit log: %m");
386 if (bus_connect(DBUS_BUS_SYSTEM
, &c
.bus
, NULL
, &error
) < 0) {
387 log_error("Failed to get D-Bus connection: %s", bus_error_message(&error
));
392 log_debug("systemd-update-utmp running as pid %lu", (unsigned long) getpid());
394 if (streq(argv
[1], "reboot"))
396 else if (streq(argv
[1], "shutdown"))
398 else if (streq(argv
[1], "runlevel"))
401 log_error("Unknown command %s", argv
[1]);
405 log_debug("systemd-update-utmp stopped as pid %lu", (unsigned long) getpid());
410 audit_close(c
.audit_fd
);
414 dbus_connection_flush(c
.bus
);
415 dbus_connection_close(c
.bus
);
416 dbus_connection_unref(c
.bus
);
419 dbus_error_free(&error
);
422 return r
< 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;