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"
41 typedef struct Context {
48 static usec_t get_startup_time(Context *c) {
49 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
55 r = sd_bus_get_property_trivial(
57 "org.freedesktop.systemd1",
58 "/org/freedesktop/systemd1",
59 "org.freedesktop.systemd1.Manager",
64 log_error("Failed to get timestamp: %s", bus_error_message(&error, -r));
71 static int get_current_runlevel(Context *c) {
76 /* The first target of this list that is active or has
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. */
81 { '5', SPECIAL_GRAPHICAL_TARGET },
82 { '3', SPECIAL_MULTI_USER_TARGET },
83 { '1', SPECIAL_RESCUE_TARGET },
86 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
92 for (i = 0; i < ELEMENTSOF(table); i++) {
93 _cleanup_free_ char *state = NULL, *path = NULL;
95 path = unit_dbus_path_from_name(table[i].special);
99 r = sd_bus_get_property_string(
101 "org.freedesktop.systemd1",
103 "org.freedesktop.systemd1.Unit",
108 log_warning("Failed to get state: %s", bus_error_message(&error, -r));
112 if (streq(state, "active") || streq(state, "reloading"))
113 return table[i].runlevel;
119 static int on_reboot(Context *c) {
125 /* We finished start-up, so let's write the utmp
126 * record and send the audit msg */
129 if (c->audit_fd >= 0)
130 if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
132 log_error_errno(errno, "Failed to send audit message: %m");
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);
141 q = utmp_put_reboot(t);
143 log_error_errno(q, "Failed to write utmp record: %m");
150 static int on_shutdown(Context *c) {
155 /* We started shut-down, so let's write the utmp
156 * record and send the audit msg */
159 if (c->audit_fd >= 0)
160 if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
162 log_error_errno(errno, "Failed to send audit message: %m");
167 q = utmp_put_shutdown();
169 log_error_errno(q, "Failed to write utmp record: %m");
176 static int on_runlevel(Context *c) {
177 int r = 0, q, previous, runlevel;
181 /* We finished changing runlevel, so let's write the
182 * utmp record and send the audit msg */
184 /* First, get last runlevel */
185 q = utmp_get_runlevel(&previous, NULL);
188 if (q != -ESRCH && q != -ENOENT)
189 return log_error_errno(q, "Failed to get current runlevel: %m");
194 /* Secondly, get new runlevel */
195 runlevel = get_current_runlevel(c);
200 if (previous == runlevel)
204 if (c->audit_fd >= 0) {
205 _cleanup_free_ char *s = NULL;
207 if (asprintf(&s, "old-level=%c new-level=%c",
208 previous > 0 ? previous : 'N',
209 runlevel > 0 ? runlevel : 'N') < 0)
212 if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
214 log_error_errno(errno, "Failed to send audit message: %m");
220 q = utmp_put_runlevel(runlevel, previous);
221 if (q < 0 && q != -ESRCH && q != -ENOENT) {
222 log_error_errno(q, "Failed to write utmp record: %m");
229 int main(int argc, char *argv[]) {
237 if (getppid() != 1) {
238 log_error("This program should be invoked by init only.");
243 log_error("This program requires one argument.");
247 log_set_target(LOG_TARGET_AUTO);
248 log_parse_environment();
254 /* If the kernel lacks netlink or audit support,
255 * don't worry about it. */
256 c.audit_fd = audit_open();
257 if (c.audit_fd < 0 && errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
258 log_error_errno(errno, "Failed to connect to audit log: %m");
260 r = bus_open_system_systemd(&c.bus);
262 log_error_errno(r, "Failed to get D-Bus connection: %m");
267 log_debug("systemd-update-utmp running as pid "PID_FMT, getpid());
269 if (streq(argv[1], "reboot"))
271 else if (streq(argv[1], "shutdown"))
273 else if (streq(argv[1], "runlevel"))
276 log_error("Unknown command %s", argv[1]);
280 log_debug("systemd-update-utmp stopped as pid "PID_FMT, getpid());
285 audit_close(c.audit_fd);
291 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;