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/>.
25 #include <sys/types.h>
38 #include "utmp-wtmp.h"
40 #include "bus-error.h"
41 #include "unit-name.h"
43 typedef struct Context {
50 static usec_t get_startup_time(Context *c) {
51 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
57 r = sd_bus_get_property_trivial(
59 "org.freedesktop.systemd1",
60 "/org/freedesktop/systemd1",
61 "org.freedesktop.systemd1.Manager",
66 log_error("Failed to get timestamp: %s", bus_error_message(&error, -r));
73 static int get_current_runlevel(Context *c) {
78 /* The first target of this list that is active or has
79 * a job scheduled wins. We prefer runlevels 5 and 3
80 * here over the others, since these are the main
81 * runlevels used on Fedora. It might make sense to
82 * change the order on some distributions. */
83 { '5', SPECIAL_RUNLEVEL5_TARGET },
84 { '3', SPECIAL_RUNLEVEL3_TARGET },
85 { '4', SPECIAL_RUNLEVEL4_TARGET },
86 { '2', SPECIAL_RUNLEVEL2_TARGET },
87 { '1', SPECIAL_RESCUE_TARGET },
90 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
96 for (i = 0; i < ELEMENTSOF(table); i++) {
97 _cleanup_free_ char *state = NULL, *path = NULL;
99 path = unit_dbus_path_from_name(table[i].special);
103 r = sd_bus_get_property_string(
105 "org.freedesktop.systemd1",
107 "org.freedesktop.systemd1.Unit",
112 log_warning("Failed to get state: %s", bus_error_message(&error, -r));
116 if (streq(state, "active") || streq(state, "reloading"))
117 return table[i].runlevel;
123 static int on_reboot(Context *c) {
129 /* We finished start-up, so let's write the utmp
130 * record and send the audit msg */
133 if (c->audit_fd >= 0)
134 if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
136 log_error_errno(errno, "Failed to send audit message: %m");
141 /* If this call fails it will return 0, which
142 * utmp_put_reboot() will then fix to the current time */
143 t = get_startup_time(c);
145 q = utmp_put_reboot(t);
147 log_error_errno(q, "Failed to write utmp record: %m");
154 static int on_shutdown(Context *c) {
159 /* We started shut-down, so let's write the utmp
160 * record and send the audit msg */
163 if (c->audit_fd >= 0)
164 if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "", "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
166 log_error_errno(errno, "Failed to send audit message: %m");
171 q = utmp_put_shutdown();
173 log_error_errno(q, "Failed to write utmp record: %m");
180 static int on_runlevel(Context *c) {
181 int r = 0, q, previous, runlevel;
185 /* We finished changing runlevel, so let's write the
186 * utmp record and send the audit msg */
188 /* First, get last runlevel */
189 q = utmp_get_runlevel(&previous, NULL);
192 if (q != -ESRCH && q != -ENOENT)
193 return log_error_errno(q, "Failed to get current runlevel: %m");
198 /* Secondly, get new runlevel */
199 runlevel = get_current_runlevel(c);
204 if (previous == runlevel)
208 if (c->audit_fd >= 0) {
209 _cleanup_free_ char *s = NULL;
211 if (asprintf(&s, "old-level=%c new-level=%c",
212 previous > 0 ? previous : 'N',
213 runlevel > 0 ? runlevel : 'N') < 0)
216 if (audit_log_user_comm_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, "systemd-update-utmp", NULL, NULL, NULL, 1) < 0 &&
218 log_error_errno(errno, "Failed to send audit message: %m");
224 q = utmp_put_runlevel(runlevel, previous);
225 if (q < 0 && q != -ESRCH && q != -ENOENT) {
226 log_error_errno(q, "Failed to write utmp record: %m");
233 int main(int argc, char *argv[]) {
241 if (getppid() != 1) {
242 log_error("This program should be invoked by init only.");
247 log_error("This program requires one argument.");
251 log_set_target(LOG_TARGET_AUTO);
252 log_parse_environment();
258 /* If the kernel lacks netlink or audit support,
259 * don't worry about it. */
260 c.audit_fd = audit_open();
261 if (c.audit_fd < 0 && errno != EAFNOSUPPORT && errno != EPROTONOSUPPORT)
262 log_error_errno(errno, "Failed to connect to audit log: %m");
264 r = bus_open_system_systemd(&c.bus);
266 log_error_errno(r, "Failed to get D-Bus connection: %m");
271 log_debug("systemd-update-utmp running as pid "PID_FMT, getpid());
273 if (streq(argv[1], "reboot"))
275 else if (streq(argv[1], "shutdown"))
277 else if (streq(argv[1], "runlevel"))
280 log_error("Unknown command %s", argv[1]);
284 log_debug("systemd-update-utmp stopped as pid "PID_FMT, getpid());
289 audit_close(c.audit_fd);
295 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;