mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 16:59:03 +03:00
419 lines
13 KiB
C
419 lines
13 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright 2010 Lennart Poettering
|
|
|
|
systemd is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
systemd is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#include <dbus/dbus.h>
|
|
|
|
#ifdef HAVE_AUDIT
|
|
#include <libaudit.h>
|
|
#endif
|
|
|
|
#include "log.h"
|
|
#include "macro.h"
|
|
#include "util.h"
|
|
#include "special.h"
|
|
#include "utmp-wtmp.h"
|
|
#include "dbus-common.h"
|
|
|
|
typedef struct Context {
|
|
DBusConnection *bus;
|
|
#ifdef HAVE_AUDIT
|
|
int audit_fd;
|
|
#endif
|
|
} Context;
|
|
|
|
static usec_t get_startup_time(Context *c) {
|
|
const char
|
|
*interface = "org.freedesktop.systemd1.Manager",
|
|
*property = "StartupTimestamp";
|
|
|
|
DBusError error;
|
|
usec_t t = 0;
|
|
DBusMessage *m = NULL, *reply = NULL;
|
|
DBusMessageIter iter, sub;
|
|
|
|
dbus_error_init(&error);
|
|
|
|
assert(c);
|
|
|
|
if (!(m = dbus_message_new_method_call(
|
|
"org.freedesktop.systemd1",
|
|
"/org/freedesktop/systemd1",
|
|
"org.freedesktop.DBus.Properties",
|
|
"Get"))) {
|
|
log_error("Could not allocate message.");
|
|
goto finish;
|
|
}
|
|
|
|
if (!dbus_message_append_args(m,
|
|
DBUS_TYPE_STRING, &interface,
|
|
DBUS_TYPE_STRING, &property,
|
|
DBUS_TYPE_INVALID)) {
|
|
log_error("Could not append arguments to message.");
|
|
goto finish;
|
|
}
|
|
|
|
if (!(reply = dbus_connection_send_with_reply_and_block(c->bus, m, -1, &error))) {
|
|
log_error("Failed to send command: %s", bus_error_message(&error));
|
|
goto finish;
|
|
}
|
|
|
|
if (!dbus_message_iter_init(reply, &iter) ||
|
|
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
|
|
log_error("Failed to parse reply.");
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_iter_recurse(&iter, &sub);
|
|
|
|
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_UINT64) {
|
|
log_error("Failed to parse reply.");
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_iter_get_basic(&sub, &t);
|
|
|
|
finish:
|
|
if (m)
|
|
dbus_message_unref(m);
|
|
|
|
if (reply)
|
|
dbus_message_unref(reply);
|
|
|
|
dbus_error_free(&error);
|
|
|
|
return t;
|
|
}
|
|
|
|
static int get_current_runlevel(Context *c) {
|
|
static const struct {
|
|
const int runlevel;
|
|
const char *special;
|
|
} table[] = {
|
|
/* The first target of this list that is active or has
|
|
* a job scheduled wins. We prefer runlevels 5 and 3
|
|
* here over the others, since these are the main
|
|
* runlevels used on Fedora. It might make sense to
|
|
* change the order on some distributions. */
|
|
{ '5', SPECIAL_RUNLEVEL5_TARGET },
|
|
{ '3', SPECIAL_RUNLEVEL3_TARGET },
|
|
{ '4', SPECIAL_RUNLEVEL4_TARGET },
|
|
{ '2', SPECIAL_RUNLEVEL2_TARGET },
|
|
{ 'S', SPECIAL_RESCUE_TARGET },
|
|
};
|
|
const char
|
|
*interface = "org.freedesktop.systemd1.Unit",
|
|
*property = "ActiveState";
|
|
|
|
DBusMessage *m = NULL, *reply = NULL;
|
|
int r = 0;
|
|
unsigned i;
|
|
DBusError error;
|
|
|
|
assert(c);
|
|
|
|
dbus_error_init(&error);
|
|
|
|
for (i = 0; i < ELEMENTSOF(table); i++) {
|
|
const char *path = NULL, *state;
|
|
DBusMessageIter iter, sub;
|
|
|
|
if (!(m = dbus_message_new_method_call(
|
|
"org.freedesktop.systemd1",
|
|
"/org/freedesktop/systemd1",
|
|
"org.freedesktop.systemd1.Manager",
|
|
"GetUnit"))) {
|
|
log_error("Could not allocate message.");
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if (!dbus_message_append_args(m,
|
|
DBUS_TYPE_STRING, &table[i].special,
|
|
DBUS_TYPE_INVALID)) {
|
|
log_error("Could not append arguments to message.");
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if (!(reply = dbus_connection_send_with_reply_and_block(c->bus, m, -1, &error))) {
|
|
dbus_error_free(&error);
|
|
continue;
|
|
}
|
|
|
|
if (!dbus_message_get_args(reply, &error,
|
|
DBUS_TYPE_OBJECT_PATH, &path,
|
|
DBUS_TYPE_INVALID)) {
|
|
log_error("Failed to parse reply: %s", bus_error_message(&error));
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_unref(m);
|
|
if (!(m = dbus_message_new_method_call(
|
|
"org.freedesktop.systemd1",
|
|
path,
|
|
"org.freedesktop.DBus.Properties",
|
|
"Get"))) {
|
|
log_error("Could not allocate message.");
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if (!dbus_message_append_args(m,
|
|
DBUS_TYPE_STRING, &interface,
|
|
DBUS_TYPE_STRING, &property,
|
|
DBUS_TYPE_INVALID)) {
|
|
log_error("Could not append arguments to message.");
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_unref(reply);
|
|
if (!(reply = dbus_connection_send_with_reply_and_block(c->bus, m, -1, &error))) {
|
|
log_error("Failed to send command: %s", bus_error_message(&error));
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
if (!dbus_message_iter_init(reply, &iter) ||
|
|
dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) {
|
|
log_error("Failed to parse reply.");
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_iter_recurse(&iter, &sub);
|
|
|
|
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING) {
|
|
log_error("Failed to parse reply.");
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_iter_get_basic(&sub, &state);
|
|
|
|
if (streq(state, "active") || streq(state, "reloading"))
|
|
r = table[i].runlevel;
|
|
|
|
dbus_message_unref(m);
|
|
dbus_message_unref(reply);
|
|
m = reply = NULL;
|
|
|
|
if (r)
|
|
break;
|
|
}
|
|
|
|
finish:
|
|
if (m)
|
|
dbus_message_unref(m);
|
|
|
|
if (reply)
|
|
dbus_message_unref(reply);
|
|
|
|
dbus_error_free(&error);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int on_reboot(Context *c) {
|
|
int r = 0, q;
|
|
usec_t t;
|
|
|
|
assert(c);
|
|
|
|
/* We finished start-up, so let's write the utmp
|
|
* record and send the audit msg */
|
|
|
|
#ifdef HAVE_AUDIT
|
|
if (c->audit_fd >= 0)
|
|
if (audit_log_user_message(c->audit_fd, AUDIT_SYSTEM_BOOT, "init", NULL, NULL, NULL, 1) < 0) {
|
|
log_error("Failed to send audit message: %m");
|
|
r = -errno;
|
|
}
|
|
#endif
|
|
|
|
/* If this call fails it will return 0, which
|
|
* utmp_put_reboot() will then fix to the current time */
|
|
t = get_startup_time(c);
|
|
|
|
if ((q = utmp_put_reboot(t)) < 0) {
|
|
log_error("Failed to write utmp record: %s", strerror(-q));
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int on_shutdown(Context *c) {
|
|
int r = 0, q;
|
|
|
|
assert(c);
|
|
|
|
/* We started shut-down, so let's write the utmp
|
|
* record and send the audit msg */
|
|
|
|
#ifdef HAVE_AUDIT
|
|
if (c->audit_fd >= 0)
|
|
if (audit_log_user_message(c->audit_fd, AUDIT_SYSTEM_SHUTDOWN, "init", NULL, NULL, NULL, 1) < 0) {
|
|
log_error("Failed to send audit message: %m");
|
|
r = -errno;
|
|
}
|
|
#endif
|
|
|
|
if ((q = utmp_put_shutdown(0)) < 0) {
|
|
log_error("Failed to write utmp record: %s", strerror(-q));
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static int on_runlevel(Context *c) {
|
|
int r = 0, q, previous, runlevel;
|
|
|
|
assert(c);
|
|
|
|
/* We finished changing runlevel, so let's write the
|
|
* utmp record and send the audit msg */
|
|
|
|
/* First, get last runlevel */
|
|
if ((q = utmp_get_runlevel(&previous, NULL)) < 0) {
|
|
|
|
if (q != -ESRCH && q != -ENOENT) {
|
|
log_error("Failed to get current runlevel: %s", strerror(-q));
|
|
return q;
|
|
}
|
|
|
|
/* Hmm, we didn't find any runlevel, that means we
|
|
* have been rebooted */
|
|
r = on_reboot(c);
|
|
previous = 0;
|
|
}
|
|
|
|
/* Secondly, get new runlevel */
|
|
if ((runlevel = get_current_runlevel(c)) < 0)
|
|
return runlevel;
|
|
|
|
if (previous == runlevel)
|
|
return 0;
|
|
|
|
#ifdef HAVE_AUDIT
|
|
if (c->audit_fd >= 0) {
|
|
char *s = NULL;
|
|
|
|
if (asprintf(&s, "old-level=%c new-level=%c",
|
|
previous > 0 ? previous : 'N',
|
|
runlevel > 0 ? runlevel : 'N') < 0)
|
|
return -ENOMEM;
|
|
|
|
if (audit_log_user_message(c->audit_fd, AUDIT_SYSTEM_RUNLEVEL, s, NULL, NULL, NULL, 1) < 0) {
|
|
log_error("Failed to send audit message: %m");
|
|
r = -errno;
|
|
}
|
|
|
|
free(s);
|
|
}
|
|
#endif
|
|
|
|
if ((q = utmp_put_runlevel(0, runlevel, previous)) < 0) {
|
|
log_error("Failed to write utmp record: %s", strerror(-q));
|
|
r = q;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int r;
|
|
DBusError error;
|
|
Context c;
|
|
|
|
dbus_error_init(&error);
|
|
|
|
zero(c);
|
|
#ifdef HAVE_AUDIT
|
|
c.audit_fd = -1;
|
|
#endif
|
|
|
|
if (getppid() != 1) {
|
|
log_error("This program should be invoked by init only.");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
if (argc != 2) {
|
|
log_error("This program requires one argument.");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
#ifdef HAVE_AUDIT
|
|
if ((c.audit_fd = audit_open()) < 0)
|
|
log_error("Failed to connect to audit log: %m");
|
|
#endif
|
|
|
|
if (bus_connect(DBUS_BUS_SYSTEM, &c.bus, NULL, &error) < 0) {
|
|
log_error("Failed to get D-Bus connection: %s", bus_error_message(&error));
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
log_debug("systemd-update-utmp running as pid %lu", (unsigned long) getpid());
|
|
|
|
if (streq(argv[1], "reboot"))
|
|
r = on_reboot(&c);
|
|
else if (streq(argv[1], "shutdown"))
|
|
r = on_shutdown(&c);
|
|
else if (streq(argv[1], "runlevel"))
|
|
r = on_runlevel(&c);
|
|
else {
|
|
log_error("Unknown command %s", argv[1]);
|
|
r = -EINVAL;
|
|
}
|
|
|
|
log_debug("systemd-update-utmp stopped as pid %lu", (unsigned long) getpid());
|
|
|
|
finish:
|
|
#ifdef HAVE_AUDIT
|
|
if (c.audit_fd >= 0)
|
|
audit_close(c.audit_fd);
|
|
#endif
|
|
|
|
if (c.bus) {
|
|
dbus_connection_flush(c.bus);
|
|
dbus_connection_close(c.bus);
|
|
dbus_connection_unref(c.bus);
|
|
}
|
|
|
|
dbus_error_free(&error);
|
|
dbus_shutdown();
|
|
|
|
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
}
|