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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
36 #include "utmp-wtmp.h"
38 #include "bus-error.h"
39 #include "unit-name.h"
40 #include "formats-util.h"
42 typedef struct Context
{
49 static usec_t
get_startup_time(Context
*c
) {
50 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
56 r
= sd_bus_get_property_trivial(
58 "org.freedesktop.systemd1",
59 "/org/freedesktop/systemd1",
60 "org.freedesktop.systemd1.Manager",
65 log_error_errno(r
, "Failed to get timestamp: %s", bus_error_message(&error
, r
));
72 static int get_current_runlevel(Context
*c
) {
77 /* The first target of this list that is active or has
78 * a job scheduled wins. We prefer runlevels 5 and 3
79 * here over the others, since these are the main
80 * runlevels used on Fedora. It might make sense to
81 * change the order on some distributions. */
82 { '5', SPECIAL_GRAPHICAL_TARGET
},
83 { '3', SPECIAL_MULTI_USER_TARGET
},
84 { '1', SPECIAL_RESCUE_TARGET
},
87 _cleanup_bus_error_free_ sd_bus_error error
= SD_BUS_ERROR_NULL
;
93 for (i
= 0; i
< ELEMENTSOF(table
); i
++) {
94 _cleanup_free_
char *state
= NULL
, *path
= NULL
;
96 path
= unit_dbus_path_from_name(table
[i
].special
);
100 r
= sd_bus_get_property_string(
102 "org.freedesktop.systemd1",
104 "org.freedesktop.systemd1.Unit",
109 return log_warning_errno(r
, "Failed to get state: %s", bus_error_message(&error
, r
));
111 if (streq(state
, "active") || streq(state
, "reloading"))
112 return table
[i
].runlevel
;
118 static int on_reboot(Context
*c
) {
124 /* We finished start-up, so let's write the utmp
125 * record and send the audit msg */
128 if (c
->audit_fd
>= 0)
129 if (audit_log_user_comm_message(c
->audit_fd
, AUDIT_SYSTEM_BOOT
, "", "systemd-update-utmp", NULL
, NULL
, NULL
, 1) < 0 &&
131 r
= log_error_errno(errno
, "Failed to send audit message: %m");
135 /* If this call fails it will return 0, which
136 * utmp_put_reboot() will then fix to the current time */
137 t
= get_startup_time(c
);
139 q
= utmp_put_reboot(t
);
141 log_error_errno(q
, "Failed to write utmp record: %m");
148 static int on_shutdown(Context
*c
) {
153 /* We started shut-down, so let's write the utmp
154 * record and send the audit msg */
157 if (c
->audit_fd
>= 0)
158 if (audit_log_user_comm_message(c
->audit_fd
, AUDIT_SYSTEM_SHUTDOWN
, "", "systemd-update-utmp", NULL
, NULL
, NULL
, 1) < 0 &&
160 r
= log_error_errno(errno
, "Failed to send audit message: %m");
164 q
= utmp_put_shutdown();
166 log_error_errno(q
, "Failed to write utmp record: %m");
173 static int on_runlevel(Context
*c
) {
174 int r
= 0, q
, previous
, runlevel
;
178 /* We finished changing runlevel, so let's write the
179 * utmp record and send the audit msg */
181 /* First, get last runlevel */
182 q
= utmp_get_runlevel(&previous
, NULL
);
185 if (q
!= -ESRCH
&& q
!= -ENOENT
)
186 return log_error_errno(q
, "Failed to get current runlevel: %m");
191 /* Secondly, get new runlevel */
192 runlevel
= get_current_runlevel(c
);
197 if (previous
== runlevel
)
201 if (c
->audit_fd
>= 0) {
202 _cleanup_free_
char *s
= NULL
;
204 if (asprintf(&s
, "old-level=%c new-level=%c",
205 previous
> 0 ? previous
: 'N',
206 runlevel
> 0 ? runlevel
: 'N') < 0)
209 if (audit_log_user_comm_message(c
->audit_fd
, AUDIT_SYSTEM_RUNLEVEL
, s
, "systemd-update-utmp", NULL
, NULL
, NULL
, 1) < 0 && errno
!= EPERM
)
210 r
= log_error_errno(errno
, "Failed to send audit message: %m");
214 q
= utmp_put_runlevel(runlevel
, previous
);
215 if (q
< 0 && q
!= -ESRCH
&& q
!= -ENOENT
) {
216 log_error_errno(q
, "Failed to write utmp record: %m");
223 int main(int argc
, char *argv
[]) {
231 if (getppid() != 1) {
232 log_error("This program should be invoked by init only.");
237 log_error("This program requires one argument.");
241 log_set_target(LOG_TARGET_AUTO
);
242 log_parse_environment();
248 /* If the kernel lacks netlink or audit support,
249 * don't worry about it. */
250 c
.audit_fd
= audit_open();
251 if (c
.audit_fd
< 0 && errno
!= EAFNOSUPPORT
&& errno
!= EPROTONOSUPPORT
)
252 log_error_errno(errno
, "Failed to connect to audit log: %m");
254 r
= bus_connect_system_systemd(&c
.bus
);
256 log_error_errno(r
, "Failed to get D-Bus connection: %m");
261 log_debug("systemd-update-utmp running as pid "PID_FMT
, getpid());
263 if (streq(argv
[1], "reboot"))
265 else if (streq(argv
[1], "shutdown"))
267 else if (streq(argv
[1], "runlevel"))
270 log_error("Unknown command %s", argv
[1]);
274 log_debug("systemd-update-utmp stopped as pid "PID_FMT
, getpid());
279 audit_close(c
.audit_fd
);
282 sd_bus_flush_close_unref(c
.bus
);
283 return r
< 0 ? EXIT_FAILURE
: EXIT_SUCCESS
;