[thirdparty/systemd.git] / src / shutdown.c

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

/***
  This file is part of systemd.

  Copyright 2010 ProFUSION embedded systems

  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 <sys/mman.h>
#include <sys/types.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
#include <sys/wait.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>

#include "log.h"
#include "umount.h"
#include "util.h"

#define TIMEOUT_USEC (5 * USEC_PER_SEC)
#define FINALIZE_ATTEMPTS 50

static bool ignore_proc(pid_t pid) {
        if (pid == 1)
                return true;

        /* TODO: add more ignore rules here: device-mapper, etc */

        return false;
}

static bool is_kernel_thread(pid_t pid)
{
        char buf[PATH_MAX];
        FILE *f;
        char c;
        size_t count;

        snprintf(buf, sizeof(buf), "/proc/%lu/cmdline", (unsigned long)pid);
        f = fopen(buf, "re");
        if (!f)
                return true; /* not really, but has the desired effect */

        count = fread(&c, 1, 1, f);
        fclose(f);
        return count != 1;
}

static int killall(int sign) {
        DIR *dir;
        struct dirent *d;
        unsigned int n_processes = 0;

        if ((dir = opendir("/proc")) == NULL)
                return -errno;

        while ((d = readdir(dir))) {
                pid_t pid;

                if (parse_pid(d->d_name, &pid) < 0)
                        continue;

                if (is_kernel_thread(pid))
                        continue;

                if (ignore_proc(pid))
                        continue;

                if (kill(pid, sign) == 0)
                        n_processes++;
                else
                        log_warning("Could not kill %d: %m", pid);
        }

        closedir(dir);

        return n_processes;
}

static int send_signal(int sign) {
        sigset_t mask, oldmask;
        usec_t until;
        int n_processes;
        struct timespec ts;

        assert_se(sigemptyset(&mask) == 0);
        assert_se(sigaddset(&mask, SIGCHLD) == 0);
        if (sigprocmask(SIG_BLOCK, &mask, &oldmask) != 0)
                return -errno;

        if (kill(-1, SIGSTOP) < 0)
                log_warning("kill(-1, SIGSTOP) failed: %m");

        n_processes = killall(sign);

        if (kill(-1, SIGCONT) < 0)
                log_warning("kill(-1, SIGCONT) failed: %m");

        if (n_processes <= 0)
                goto finish;

        until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
        for (;;) {
                int k;
                usec_t n = now(CLOCK_MONOTONIC);

                for (;;) {
                        pid_t pid = waitpid(-1, NULL, WNOHANG);

                        if (pid == 0)
                                break;
                        else if (pid < 0 && errno == ECHILD) {
                                n_processes = 0;
                                goto finish;
                        }

                        if (--n_processes == 0)
                                goto finish;
                }

                if (n >= until)
                        goto finish;

                timespec_store(&ts, until - n);
                if ((k = sigtimedwait(&mask, NULL, &ts)) != SIGCHLD) {
                        if (k >= 0)
                                log_warning("sigtimedwait() returned unexpected signal.");
                        if (k < 0 && errno != EAGAIN)
                                log_warning("sigtimedwait() failed: %m");
                }
        }

finish:
        sigprocmask(SIG_SETMASK, &oldmask, NULL);

        return n_processes;
}

static int rescue_send_signal(int sign) {
        sigset_t mask, oldmask;
        usec_t until;
        struct timespec ts;
        int r;

        sigemptyset(&mask);
        sigaddset(&mask, SIGCHLD);
        if (sigprocmask(SIG_BLOCK, &mask, &oldmask) != 0)
                return -errno;

        if (kill(-1, SIGSTOP) < 0)
                log_warning("kill(-1, SIGSTOP) failed: %m");

        r = kill(-1, sign);
        if (r < 0)
                log_warning("kill(-1, %d) failed: %m", sign);

        if (kill(-1, SIGCONT) < 0)
                log_warning("kill(-1, SIGCONT) failed: %m");

        if (r < 0)
                goto finish;

        until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
        for (;;) {
                int k;
                usec_t n = now(CLOCK_MONOTONIC);

                for (;;) {
                        pid_t pid = waitpid(-1, NULL, WNOHANG);
                        if (pid == 0)
                                break;
                        else if (pid < 0 && errno == ECHILD)
                                goto finish;
                }

                if (n >= until)
                        goto finish;

                timespec_store(&ts, until - n);
                if ((k = sigtimedwait(&mask, NULL, &ts)) != SIGCHLD) {
                        if (k >= 0)
                                log_warning("sigtimedwait() returned unexpected signal.");
                        if (k < 0 && errno != EAGAIN)
                                log_warning("sigtimedwait() failed: %m");
                }
        }

finish:
        sigprocmask(SIG_SETMASK, &oldmask, NULL);

        return r;
}

int main(int argc, char *argv[]) {
        int cmd, r;
        unsigned retries;
        bool need_umount = true, need_swapoff = true, need_loop_detach = true, need_dm_detach = true;
        bool killed_everbody = false;

        log_parse_environment();
        log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
        log_open();

        if (getpid() != 1) {
                log_error("Not executed by init (pid 1).");
                r = -EPERM;
                goto error;
        }

        if (argc != 2) {
                log_error("Invalid number of arguments.");
                r = -EINVAL;
                goto error;
        }

        if (streq(argv[1], "reboot"))
                cmd = RB_AUTOBOOT;
        else if (streq(argv[1], "poweroff"))
                cmd = RB_POWER_OFF;
        else if (streq(argv[1], "halt"))
                cmd = RB_HALT_SYSTEM;
        else if (streq(argv[1], "kexec"))
                cmd = LINUX_REBOOT_CMD_KEXEC;
        else {
                log_error("Unknown action '%s'.", argv[1]);
                r = -EINVAL;
                goto error;
        }

        /* lock us into memory */
        if (mlockall(MCL_CURRENT|MCL_FUTURE) != 0)
                log_warning("Cannot lock process memory: %m");

        log_info("Sending SIGTERM to remaining processes...");
        r = send_signal(SIGTERM);
        if (r < 0)
                log_warning("Failed to send SIGTERM to remaining processes: %s", strerror(r));

        log_info("Sending SIGKILL to remaining processes...");
        r = send_signal(SIGKILL);
        if (r < 0)
                log_warning("Failed to send SIGKILL to remaining processes: %s", strerror(r));

        /* Unmount all mountpoints, swaps, and loopback devices */
        for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) {
                bool changed = false;

                if (need_umount) {
                        log_info("Unmounting file systems.");
                        r = umount_all(&changed);
                        if (r == 0)
                                need_umount = false;
                        else if (r > 0)
                                log_info("Not all file systems unmounted, %d left.", r);
                        else
                                log_error("Failed to unmount file systems: %s", strerror(-r));
                }

                if (need_swapoff) {
                        log_info("Disabling swaps.");
                        r = swapoff_all(&changed);
                        if (r == 0)
                                need_swapoff = false;
                        else if (r > 0)
                                log_info("Not all swaps are turned off, %d left.", r);
                        else
                                log_error("Failed to turn off swaps: %s", strerror(-r));
                }

                if (need_loop_detach) {
                        log_info("Detaching loop devices.");
                        r = loopback_detach_all(&changed);
                        if (r == 0)
                                need_loop_detach = false;
                        else if (r > 0)
                                log_info("Not all loop devices detached, %d left.", r);
                        else
                                log_error("Failed to detach loop devices: %s", strerror(-r));
                }

                if (need_dm_detach) {
                        log_info("Detaching DM devices.");
                        r = dm_detach_all(&changed);
                        if (r == 0)
                                need_dm_detach = false;
                        else if (r > 0)
                                log_warning("Not all DM devices detached, %d left.", r);
                        else
                                log_error("Failed to detach DM devices: %s", strerror(-r));
                }

                if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach)
                        /* Yay, done */
                        break;

                /* If in this iteration we didn't manage to
                 * unmount/deactivate anything, we either kill more
                 * processes, or simply give up */
                if (!changed) {

                        if (killed_everbody) {
                                /* Hmm, we already killed everybody,
                                 * let's just give up */
                                log_error("Cannot finalize remaining file systems and devices, giving up.");
                                break;
                        }

                        log_warning("Cannot finalize remaining file systems and devices, trying to kill remaining processes.");
                        rescue_send_signal(SIGTERM);
                        rescue_send_signal(SIGKILL);
                        killed_everbody = true;
                }

                log_debug("Couldn't finalize remaining file systems and devices after %u retries, trying again.", retries+1);
        }

        if (retries >= FINALIZE_ATTEMPTS)
                log_error("Too many interations, giving up.");

        execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, NULL);

        sync();

        if (cmd == LINUX_REBOOT_CMD_KEXEC) {
                /* We cheat and exec kexec to avoid doing all its work */
                pid_t pid = fork();

                if (pid < 0)
                        log_error("Could not fork: %m. Falling back to normal reboot.");
                else if (pid > 0) {
                        wait_for_terminate_and_warn("kexec", pid);
                        log_warning("kexec failed. Falling back to normal reboot.");
                } else {
                        /* Child */
                        const char *args[3] = { "/sbin/kexec", "-e", NULL };
                        execv(args[0], (char * const *) args);
                        return EXIT_FAILURE;
                }

                cmd = RB_AUTOBOOT;
        }

        reboot(cmd);
        log_error("Failed to invoke reboot(): %m");
        r = -errno;

  error:
        log_error("Critical error while doing system shutdown: %s", strerror(-r));

        freeze();
        return EXIT_FAILURE;
}
Commit	Line	Data
b1b2a107 FF	1	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/
	2
	3	/***
	4	This file is part of systemd.
	5
	6	Copyright 2010 ProFUSION embedded systems
	7
	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.
	12
	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.
	17
	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/>.
	20	***/
	21
	22	#include <sys/mman.h>
	23	#include <sys/types.h>
	24	#include <sys/reboot.h>
	25	#include <linux/reboot.h>
	26	#include <sys/wait.h>
	27	#include <dirent.h>
	28	#include <errno.h>
	29	#include <unistd.h>
	30	#include <signal.h>
	31	#include <stdbool.h>
	32	#include <stdlib.h>
	33	#include <string.h>
	34
	35	#include "log.h"
	36	#include "umount.h"
	37	#include "util.h"
	38
567ea02a	39	#define TIMEOUT_USEC (5 * USEC_PER_SEC)
b1b2a107	40	#define FINALIZE_ATTEMPTS 50
b1b2a107	41
b1b2a107 FF	42	static bool ignore_proc(pid_t pid) {
	43	if (pid == 1)
	44	return true;
	45
	46	/* TODO: add more ignore rules here: device-mapper, etc */
	47
	48	return false;
	49	}
	50
	51	static bool is_kernel_thread(pid_t pid)
	52	{
	53	char buf[PATH_MAX];
	54	FILE *f;
	55	char c;
	56	size_t count;
	57
	58	snprintf(buf, sizeof(buf), "/proc/%lu/cmdline", (unsigned long)pid);
	59	f = fopen(buf, "re");
	60	if (!f)
	61	return true; /* not really, but has the desired effect */
	62
	63	count = fread(&c, 1, 1, f);
	64	fclose(f);
	65	return count != 1;
	66	}
	67
	68	static int killall(int sign) {
	69	DIR *dir;
	70	struct dirent *d;
12aad1d0	71	unsigned int n_processes = 0;
b1b2a107 FF	72
	73	if ((dir = opendir("/proc")) == NULL)
	74	return -errno;
	75
	76	while ((d = readdir(dir))) {
	77	pid_t pid;
	78
	79	if (parse_pid(d->d_name, &pid) < 0)
	80	continue;
	81
	82	if (is_kernel_thread(pid))
	83	continue;
	84
	85	if (ignore_proc(pid))
	86	continue;
	87
	88	if (kill(pid, sign) == 0)
12aad1d0	89	n_processes++;
b1b2a107 FF	90	else
	91	log_warning("Could not kill %d: %m", pid);
	92	}
	93
	94	closedir(dir);
	95
12aad1d0	96	return n_processes;
b1b2a107 FF	97	}
	98
	99	static int send_signal(int sign) {
	100	sigset_t mask, oldmask;
	101	usec_t until;
12aad1d0	102	int n_processes;
b1b2a107 FF	103	struct timespec ts;
	104
	105	assert_se(sigemptyset(&mask) == 0);
	106	assert_se(sigaddset(&mask, SIGCHLD) == 0);
	107	if (sigprocmask(SIG_BLOCK, &mask, &oldmask) != 0)
	108	return -errno;
	109
	110	if (kill(-1, SIGSTOP) < 0)
ab58e291	111	log_warning("kill(-1, SIGSTOP) failed: %m");
b1b2a107	112
12aad1d0	113	n_processes = killall(sign);
b1b2a107 FF	114
b1b2a107 FF	115	if (kill(-1, SIGCONT) < 0)
ab58e291	116	log_warning("kill(-1, SIGCONT) failed: %m");
b1b2a107	117
12aad1d0	118	if (n_processes <= 0)
b1b2a107 FF	119	goto finish;
	120
	121	until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
	122	for (;;) {
ab58e291	123	int k;
b1b2a107	124	usec_t n = now(CLOCK_MONOTONIC);
ab58e291	125
b1b2a107 FF	126	for (;;) {
b1b2a107 FF	127	pid_t pid = waitpid(-1, NULL, WNOHANG);
12aad1d0	128
b1b2a107 FF	129	if (pid == 0)
	130	break;
	131	else if (pid < 0 && errno == ECHILD) {
12aad1d0	132	n_processes = 0;
b1b2a107 FF	133	goto finish;
	134	}
	135
12aad1d0	136	if (--n_processes == 0)
b1b2a107 FF	137	goto finish;
	138	}
	139
	140	if (n >= until)
	141	goto finish;
	142
	143	timespec_store(&ts, until - n);
ab58e291 LP	144	if ((k = sigtimedwait(&mask, NULL, &ts)) != SIGCHLD) {
	145	if (k >= 0)
	146	log_warning("sigtimedwait() returned unexpected signal.");
	147	if (k < 0 && errno != EAGAIN)
	148	log_warning("sigtimedwait() failed: %m");
	149	}
b1b2a107 FF	150	}
	151
	152	finish:
	153	sigprocmask(SIG_SETMASK, &oldmask, NULL);
	154
12aad1d0	155	return n_processes;
b1b2a107 FF	156	}
	157
	158	static int rescue_send_signal(int sign) {
	159	sigset_t mask, oldmask;
	160	usec_t until;
	161	struct timespec ts;
	162	int r;
	163
	164	sigemptyset(&mask);
	165	sigaddset(&mask, SIGCHLD);
	166	if (sigprocmask(SIG_BLOCK, &mask, &oldmask) != 0)
	167	return -errno;
	168
	169	if (kill(-1, SIGSTOP) < 0)
ab58e291	170	log_warning("kill(-1, SIGSTOP) failed: %m");
b1b2a107 FF	171
	172	r = kill(-1, sign);
	173	if (r < 0)
ab58e291	174	log_warning("kill(-1, %d) failed: %m", sign);
b1b2a107 FF	175
b1b2a107 FF	176	if (kill(-1, SIGCONT) < 0)
ab58e291	177	log_warning("kill(-1, SIGCONT) failed: %m");
b1b2a107 FF	178
	179	if (r < 0)
	180	goto finish;
	181
	182	until = now(CLOCK_MONOTONIC) + TIMEOUT_USEC;
	183	for (;;) {
ab58e291	184	int k;
b1b2a107	185	usec_t n = now(CLOCK_MONOTONIC);
ab58e291	186
b1b2a107 FF	187	for (;;) {
	188	pid_t pid = waitpid(-1, NULL, WNOHANG);
	189	if (pid == 0)
	190	break;
	191	else if (pid < 0 && errno == ECHILD)
	192	goto finish;
	193	}
	194
	195	if (n >= until)
	196	goto finish;
	197
	198	timespec_store(&ts, until - n);
ab58e291 LP	199	if ((k = sigtimedwait(&mask, NULL, &ts)) != SIGCHLD) {
	200	if (k >= 0)
	201	log_warning("sigtimedwait() returned unexpected signal.");
	202	if (k < 0 && errno != EAGAIN)
	203	log_warning("sigtimedwait() failed: %m");
	204	}
b1b2a107 FF	205	}
	206
	207	finish:
	208	sigprocmask(SIG_SETMASK, &oldmask, NULL);
	209
	210	return r;
	211	}
	212
b1b2a107	213	int main(int argc, char *argv[]) {
12aad1d0 LP	214	int cmd, r;
12aad1d0 LP	215	unsigned retries;
d48141ba	216	bool need_umount = true, need_swapoff = true, need_loop_detach = true, need_dm_detach = true;
12aad1d0	217	bool killed_everbody = false;
b1b2a107 FF	218
b1b2a107 FF	219	log_parse_environment();
2ca1b422	220	log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
b1b2a107 FF	221	log_open();
	222
	223	if (getpid() != 1) {
567ea02a	224	log_error("Not executed by init (pid 1).");
b1b2a107 FF	225	r = -EPERM;
	226	goto error;
	227	}
	228
	229	if (argc != 2) {
	230	log_error("Invalid number of arguments.");
	231	r = -EINVAL;
	232	goto error;
	233	}
	234
	235	if (streq(argv[1], "reboot"))
	236	cmd = RB_AUTOBOOT;
	237	else if (streq(argv[1], "poweroff"))
	238	cmd = RB_POWER_OFF;
	239	else if (streq(argv[1], "halt"))
	240	cmd = RB_HALT_SYSTEM;
	241	else if (streq(argv[1], "kexec"))
	242	cmd = LINUX_REBOOT_CMD_KEXEC;
	243	else {
	244	log_error("Unknown action '%s'.", argv[1]);
	245	r = -EINVAL;
	246	goto error;
	247	}
	248
	249	/* lock us into memory */
	250	if (mlockall(MCL_CURRENT\|MCL_FUTURE) != 0)
	251	log_warning("Cannot lock process memory: %m");
	252
ab58e291	253	log_info("Sending SIGTERM to remaining processes...");
b1b2a107 FF	254	r = send_signal(SIGTERM);
b1b2a107 FF	255	if (r < 0)
ab58e291	256	log_warning("Failed to send SIGTERM to remaining processes: %s", strerror(r));
b1b2a107	257
ab58e291	258	log_info("Sending SIGKILL to remaining processes...");
b1b2a107 FF	259	r = send_signal(SIGKILL);
b1b2a107 FF	260	if (r < 0)
ab58e291	261	log_warning("Failed to send SIGKILL to remaining processes: %s", strerror(r));
b1b2a107	262
567ea02a	263	/* Unmount all mountpoints, swaps, and loopback devices */
12aad1d0 LP	264	for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) {
	265	bool changed = false;
	266
b1b2a107	267	if (need_umount) {
ab58e291	268	log_info("Unmounting file systems.");
12aad1d0	269	r = umount_all(&changed);
b1b2a107 FF	270	if (r == 0)
	271	need_umount = false;
	272	else if (r > 0)
ab58e291	273	log_info("Not all file systems unmounted, %d left.", r);
b1b2a107	274	else
ab58e291	275	log_error("Failed to unmount file systems: %s", strerror(-r));
b1b2a107 FF	276	}
	277
	278	if (need_swapoff) {
	279	log_info("Disabling swaps.");
12aad1d0	280	r = swapoff_all(&changed);
b1b2a107 FF	281	if (r == 0)
	282	need_swapoff = false;
	283	else if (r > 0)
ab58e291	284	log_info("Not all swaps are turned off, %d left.", r);
b1b2a107	285	else
ab58e291	286	log_error("Failed to turn off swaps: %s", strerror(-r));
b1b2a107 FF	287	}
	288
	289	if (need_loop_detach) {
	290	log_info("Detaching loop devices.");
12aad1d0	291	r = loopback_detach_all(&changed);
b1b2a107 FF	292	if (r == 0)
	293	need_loop_detach = false;
	294	else if (r > 0)
ab58e291	295	log_info("Not all loop devices detached, %d left.", r);
b1b2a107	296	else
ab58e291	297	log_error("Failed to detach loop devices: %s", strerror(-r));
d48141ba	298	}
b1b2a107	299
d48141ba LP	300	if (need_dm_detach) {
d48141ba LP	301	log_info("Detaching DM devices.");
12aad1d0	302	r = dm_detach_all(&changed);
d48141ba LP	303	if (r == 0)
	304	need_dm_detach = false;
	305	else if (r > 0)
ab58e291	306	log_warning("Not all DM devices detached, %d left.", r);
d48141ba	307	else
ab58e291	308	log_error("Failed to detach DM devices: %s", strerror(-r));
b1b2a107 FF	309	}
b1b2a107 FF	310
12aad1d0 LP	311	if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach)
	312	/* Yay, done */
	313	break;
b1b2a107	314
12aad1d0 LP	315	/* If in this iteration we didn't manage to
	316	* unmount/deactivate anything, we either kill more
	317	* processes, or simply give up */
	318	if (!changed) {
b1b2a107	319
12aad1d0 LP	320	if (killed_everbody) {
	321	/* Hmm, we already killed everybody,
	322	* let's just give up */
ab58e291	323	log_error("Cannot finalize remaining file systems and devices, giving up.");
d37fb98b	324	break;
b1b2a107	325	}
12aad1d0	326
ab58e291	327	log_warning("Cannot finalize remaining file systems and devices, trying to kill remaining processes.");
12aad1d0 LP	328	rescue_send_signal(SIGTERM);
	329	rescue_send_signal(SIGKILL);
	330	killed_everbody = true;
	331	}
	332
ab58e291	333	log_debug("Couldn't finalize remaining file systems and devices after %u retries, trying again.", retries+1);
b1b2a107 FF	334	}
b1b2a107 FF	335
12aad1d0 LP	336	if (retries >= FINALIZE_ATTEMPTS)
	337	log_error("Too many interations, giving up.");
	338
83cc030f LP	339	execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, NULL);
83cc030f LP	340
b1b2a107 FF	341	sync();
	342
	343	if (cmd == LINUX_REBOOT_CMD_KEXEC) {
12aad1d0	344	/* We cheat and exec kexec to avoid doing all its work */
b1b2a107	345	pid_t pid = fork();
12aad1d0	346
e61cd186 LP	347	if (pid < 0)
	348	log_error("Could not fork: %m. Falling back to normal reboot.");
	349	else if (pid > 0) {
	350	wait_for_terminate_and_warn("kexec", pid);
	351	log_warning("kexec failed. Falling back to normal reboot.");
b1b2a107	352	} else {
e61cd186	353	/* Child */
f8d0ceb4	354	const char *args[3] = { "/sbin/kexec", "-e", NULL };
b1b2a107 FF	355	execv(args[0], (char * const *) args);
	356	return EXIT_FAILURE;
	357	}
e61cd186 LP	358
e61cd186 LP	359	cmd = RB_AUTOBOOT;
b1b2a107 FF	360	}
	361
	362	reboot(cmd);
e61cd186 LP	363	log_error("Failed to invoke reboot(): %m");
e61cd186 LP	364	r = -errno;
b1b2a107 FF	365
b1b2a107 FF	366	error:
e61cd186 LP	367	log_error("Critical error while doing system shutdown: %s", strerror(-r));
e61cd186 LP	368
b1b2a107	369	freeze();
3c14d26c	370	return EXIT_FAILURE;
b1b2a107	371	}