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/>.
22 #include <dbus/dbus.h>
28 #include <sys/types.h>
34 #include <sys/prctl.h>
35 #include <sys/mount.h>
39 #include "load-fragment.h"
42 #include "conf-parser.h"
43 #include "dbus-common.h"
51 #include "path-util.h"
52 #include "switch-root.h"
53 #include "capability.h"
57 #include "sd-daemon.h"
58 #include "sd-messages.h"
60 #include "mount-setup.h"
61 #include "loopback-setup.h"
63 #include "kmod-setup.h"
65 #include "hostname-setup.h"
66 #include "machine-id-setup.h"
67 #include "selinux-setup.h"
68 #include "ima-setup.h"
70 #include "smack-setup.h"
77 ACTION_DUMP_CONFIGURATION_ITEMS,
79 } arg_action = ACTION_RUN;
81 static char *arg_default_unit = NULL;
82 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
84 static bool arg_dump_core = true;
85 static bool arg_crash_shell = false;
86 static int arg_crash_chvt = -1;
87 static bool arg_confirm_spawn = false;
88 static bool arg_show_status = true;
89 static bool arg_switched_root = false;
90 static char ***arg_join_controllers = NULL;
91 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
92 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
93 static usec_t arg_runtime_watchdog = 0;
94 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
95 static char **arg_default_environment = NULL;
96 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
97 static uint64_t arg_capability_bounding_set_drop = 0;
98 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
100 static FILE* serialization = NULL;
102 static void nop_handler(int sig) {
105 _noreturn_ static void crash(int sig) {
108 /* Pass this on immediately, if this is not PID 1 */
110 else if (!arg_dump_core)
111 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
113 struct sigaction sa = {
114 .sa_handler = nop_handler,
115 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
119 /* We want to wait for the core process, hence let's enable SIGCHLD */
120 sigaction(SIGCHLD, &sa, NULL);
124 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
127 struct rlimit rl = {};
129 /* Enable default signal handler for core dump */
131 sa.sa_handler = SIG_DFL;
132 sigaction(sig, &sa, NULL);
134 /* Don't limit the core dump size */
135 rl.rlim_cur = RLIM_INFINITY;
136 rl.rlim_max = RLIM_INFINITY;
137 setrlimit(RLIMIT_CORE, &rl);
139 /* Just to be sure... */
142 /* Raise the signal again */
145 assert_not_reached("We shouldn't be here...");
152 /* Order things nicely. */
153 r = wait_for_terminate(pid, &status);
155 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
156 else if (status.si_code != CLD_DUMPED)
157 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
159 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
164 chvt(arg_crash_chvt);
166 if (arg_crash_shell) {
167 struct sigaction sa = {
168 .sa_handler = SIG_IGN,
169 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
173 log_info("Executing crash shell in 10s...");
176 /* Let the kernel reap children for us */
177 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
181 log_error("Failed to fork off crash shell: %m");
183 make_console_stdio();
184 execl("/bin/sh", "/bin/sh", NULL);
186 log_error("execl() failed: %m");
190 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
193 log_info("Freezing execution.");
197 static void install_crash_handler(void) {
198 struct sigaction sa = {
200 .sa_flags = SA_NODEFER,
203 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
206 static int console_setup(bool do_reset) {
209 /* If we are init, we connect stdin/stdout/stderr to /dev/null
210 * and make sure we don't have a controlling tty. */
217 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
219 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
223 /* We don't want to force text mode.
224 * plymouth may be showing pictures already from initrd. */
225 r = reset_terminal_fd(tty_fd, false);
227 log_error("Failed to reset /dev/console: %s", strerror(-r));
229 close_nointr_nofail(tty_fd);
233 static int set_default_unit(const char *u) {
242 free(arg_default_unit);
243 arg_default_unit = c;
248 static int parse_proc_cmdline_word(const char *word) {
250 static const char * const rlmap[] = {
251 "emergency", SPECIAL_EMERGENCY_TARGET,
252 "-b", SPECIAL_EMERGENCY_TARGET,
253 "single", SPECIAL_RESCUE_TARGET,
254 "-s", SPECIAL_RESCUE_TARGET,
255 "s", SPECIAL_RESCUE_TARGET,
256 "S", SPECIAL_RESCUE_TARGET,
257 "1", SPECIAL_RESCUE_TARGET,
258 "2", SPECIAL_RUNLEVEL2_TARGET,
259 "3", SPECIAL_RUNLEVEL3_TARGET,
260 "4", SPECIAL_RUNLEVEL4_TARGET,
261 "5", SPECIAL_RUNLEVEL5_TARGET,
266 if (startswith(word, "systemd.unit=")) {
269 return set_default_unit(word + 13);
271 } else if (startswith(word, "rd.systemd.unit=")) {
274 return set_default_unit(word + 16);
276 } else if (startswith(word, "systemd.log_target=")) {
278 if (log_set_target_from_string(word + 19) < 0)
279 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
281 } else if (startswith(word, "systemd.log_level=")) {
283 if (log_set_max_level_from_string(word + 18) < 0)
284 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
286 } else if (startswith(word, "systemd.log_color=")) {
288 if (log_show_color_from_string(word + 18) < 0)
289 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
291 } else if (startswith(word, "systemd.log_location=")) {
293 if (log_show_location_from_string(word + 21) < 0)
294 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
296 } else if (startswith(word, "systemd.dump_core=")) {
299 if ((r = parse_boolean(word + 18)) < 0)
300 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
304 } else if (startswith(word, "systemd.crash_shell=")) {
307 if ((r = parse_boolean(word + 20)) < 0)
308 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
312 } else if (startswith(word, "systemd.confirm_spawn=")) {
315 if ((r = parse_boolean(word + 22)) < 0)
316 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
318 arg_confirm_spawn = r;
320 } else if (startswith(word, "systemd.crash_chvt=")) {
323 if (safe_atoi(word + 19, &k) < 0)
324 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
328 } else if (startswith(word, "systemd.show_status=")) {
331 if ((r = parse_boolean(word + 20)) < 0)
332 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
335 } else if (startswith(word, "systemd.default_standard_output=")) {
338 if ((r = exec_output_from_string(word + 32)) < 0)
339 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
341 arg_default_std_output = r;
342 } else if (startswith(word, "systemd.default_standard_error=")) {
345 if ((r = exec_output_from_string(word + 31)) < 0)
346 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
348 arg_default_std_error = r;
349 } else if (startswith(word, "systemd.setenv=")) {
350 _cleanup_free_ char *cenv = NULL;
352 cenv = strdup(word + 15);
356 if (env_assignment_is_valid(cenv)) {
359 env = strv_env_set(arg_default_environment, cenv);
361 arg_default_environment = env;
363 log_warning("Setting environment variable '%s' failed, ignoring: %m", cenv);
365 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
367 } else if (startswith(word, "systemd.") ||
368 (in_initrd() && startswith(word, "rd.systemd."))) {
372 /* Ignore systemd.journald.xyz and friends */
374 if (startswith(c, "rd."))
376 if (startswith(c, "systemd."))
378 if (c[strcspn(c, ".=")] != '.') {
380 log_warning("Unknown kernel switch %s. Ignoring.", word);
382 log_info("Supported kernel switches:\n"
383 "systemd.unit=UNIT Default unit to start\n"
384 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
385 "systemd.dump_core=0|1 Dump core on crash\n"
386 "systemd.crash_shell=0|1 Run shell on crash\n"
387 "systemd.crash_chvt=N Change to VT #N on crash\n"
388 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
389 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
390 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
392 "systemd.log_level=LEVEL Log level\n"
393 "systemd.log_color=0|1 Highlight important log messages\n"
394 "systemd.log_location=0|1 Include code location in log messages\n"
395 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
396 " Set default log output for services\n"
397 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
398 " Set default log error output for services\n"
399 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
402 } else if (streq(word, "quiet"))
403 arg_show_status = false;
404 else if (streq(word, "debug")) {
405 /* Log to kmsg, the journal socket will fill up before the
406 * journal is started and tools running during that time
407 * will block with every log message for for 60 seconds,
408 * before they give up. */
409 log_set_max_level(LOG_DEBUG);
410 log_set_target(LOG_TARGET_KMSG);
411 } else if (!in_initrd()) {
414 /* SysV compatibility */
415 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
416 if (streq(word, rlmap[i]))
417 return set_default_unit(rlmap[i+1]);
423 #define DEFINE_SETTER(name, func, descr) \
424 static int name(const char *unit, \
425 const char *filename, \
427 const char *section, \
428 const char *lvalue, \
430 const char *rvalue, \
442 log_syntax(unit, LOG_ERR, filename, line, -r, \
443 "Invalid " descr "'%s': %s", \
444 rvalue, strerror(-r)); \
449 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
450 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
451 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
452 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
455 static int config_parse_cpu_affinity2(const char *unit,
456 const char *filename,
475 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
480 if (!(t = strndup(w, l)))
483 r = safe_atou(t, &cpu);
487 if (!(c = cpu_set_malloc(&ncpus)))
490 if (r < 0 || cpu >= ncpus) {
491 log_syntax(unit, LOG_ERR, filename, line, -r,
492 "Failed to parse CPU affinity '%s'", rvalue);
497 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
501 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
502 log_warning_unit(unit, "Failed to set CPU affinity: %m");
510 static void strv_free_free(char ***l) {
522 static void free_join_controllers(void) {
523 strv_free_free(arg_join_controllers);
524 arg_join_controllers = NULL;
527 static int config_parse_join_controllers(const char *unit,
528 const char *filename,
545 free_join_controllers();
547 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
550 s = strndup(w, length);
554 l = strv_split(s, ",");
559 if (strv_length(l) <= 1) {
564 if (!arg_join_controllers) {
565 arg_join_controllers = new(char**, 2);
566 if (!arg_join_controllers) {
571 arg_join_controllers[0] = l;
572 arg_join_controllers[1] = NULL;
579 t = new0(char**, n+2);
587 for (a = arg_join_controllers; *a; a++) {
589 if (strv_overlap(*a, l)) {
592 c = strv_merge(*a, l);
615 t[n++] = strv_uniq(l);
617 strv_free_free(arg_join_controllers);
618 arg_join_controllers = t;
625 static int parse_config_file(void) {
627 const ConfigTableItem items[] = {
628 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
629 { "Manager", "LogTarget", config_parse_target, 0, NULL },
630 { "Manager", "LogColor", config_parse_color, 0, NULL },
631 { "Manager", "LogLocation", config_parse_location, 0, NULL },
632 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
633 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
634 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
635 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
636 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
637 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
638 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
639 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
640 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
641 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
642 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
643 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
644 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
645 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
646 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
647 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
648 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
649 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
650 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
651 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
652 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
653 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
654 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
655 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
656 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
657 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
658 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
659 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
660 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
661 { NULL, NULL, NULL, 0, NULL }
664 _cleanup_fclose_ FILE *f;
668 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
674 log_warning("Failed to open configuration file '%s': %m", fn);
678 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
680 log_warning("Failed to parse configuration file: %s", strerror(-r));
685 static int parse_proc_cmdline(void) {
686 _cleanup_free_ char *line = NULL;
691 /* Don't read /proc/cmdline if we are in a container, since
692 * that is only relevant for the host system */
693 if (detect_container(NULL) > 0)
696 r = read_one_line_file("/proc/cmdline", &line);
698 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
702 FOREACH_WORD_QUOTED(w, l, line, state) {
703 _cleanup_free_ char *word;
705 word = strndup(w, l);
709 r = parse_proc_cmdline_word(word);
711 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
719 static int parse_argv(int argc, char *argv[]) {
722 ARG_LOG_LEVEL = 0x100,
731 ARG_DUMP_CONFIGURATION_ITEMS,
738 ARG_DEFAULT_STD_OUTPUT,
739 ARG_DEFAULT_STD_ERROR
742 static const struct option options[] = {
743 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
744 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
745 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
746 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
747 { "unit", required_argument, NULL, ARG_UNIT },
748 { "system", no_argument, NULL, ARG_SYSTEM },
749 { "user", no_argument, NULL, ARG_USER },
750 { "test", no_argument, NULL, ARG_TEST },
751 { "help", no_argument, NULL, 'h' },
752 { "version", no_argument, NULL, ARG_VERSION },
753 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
754 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
755 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
756 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
757 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
758 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
759 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
760 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
761 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
773 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
778 if ((r = log_set_max_level_from_string(optarg)) < 0) {
779 log_error("Failed to parse log level %s.", optarg);
787 if ((r = log_set_target_from_string(optarg)) < 0) {
788 log_error("Failed to parse log target %s.", optarg);
797 if ((r = log_show_color_from_string(optarg)) < 0) {
798 log_error("Failed to parse log color setting %s.", optarg);
802 log_show_color(true);
806 case ARG_LOG_LOCATION:
809 if ((r = log_show_location_from_string(optarg)) < 0) {
810 log_error("Failed to parse log location setting %s.", optarg);
814 log_show_location(true);
818 case ARG_DEFAULT_STD_OUTPUT:
820 if ((r = exec_output_from_string(optarg)) < 0) {
821 log_error("Failed to parse default standard output setting %s.", optarg);
824 arg_default_std_output = r;
827 case ARG_DEFAULT_STD_ERROR:
829 if ((r = exec_output_from_string(optarg)) < 0) {
830 log_error("Failed to parse default standard error output setting %s.", optarg);
833 arg_default_std_error = r;
838 if ((r = set_default_unit(optarg)) < 0) {
839 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
846 arg_running_as = SYSTEMD_SYSTEM;
850 arg_running_as = SYSTEMD_USER;
854 arg_action = ACTION_TEST;
858 arg_action = ACTION_VERSION;
861 case ARG_DUMP_CONFIGURATION_ITEMS:
862 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
866 r = optarg ? parse_boolean(optarg) : 1;
868 log_error("Failed to parse dump core boolean %s.", optarg);
874 case ARG_CRASH_SHELL:
875 r = optarg ? parse_boolean(optarg) : 1;
877 log_error("Failed to parse crash shell boolean %s.", optarg);
883 case ARG_CONFIRM_SPAWN:
884 r = optarg ? parse_boolean(optarg) : 1;
886 log_error("Failed to parse confirm spawn boolean %s.", optarg);
889 arg_confirm_spawn = r;
892 case ARG_SHOW_STATUS:
893 r = optarg ? parse_boolean(optarg) : 1;
895 log_error("Failed to parse show status boolean %s.", optarg);
901 case ARG_DESERIALIZE: {
905 r = safe_atoi(optarg, &fd);
906 if (r < 0 || fd < 0) {
907 log_error("Failed to parse deserialize option %s.", optarg);
908 return r < 0 ? r : -EINVAL;
911 fd_cloexec(fd, true);
915 log_error("Failed to open serialization fd: %m");
920 fclose(serialization);
927 case ARG_SWITCHED_ROOT:
928 arg_switched_root = true;
932 arg_action = ACTION_HELP;
936 log_set_max_level(LOG_DEBUG);
942 /* Just to eat away the sysvinit kernel
943 * cmdline args without getopt() error
944 * messages that we'll parse in
945 * parse_proc_cmdline_word() or ignore. */
950 log_error("Unknown option code %c", c);
957 if (optind < argc && getpid() != 1) {
958 /* Hmm, when we aren't run as init system
959 * let's complain about excess arguments */
961 log_error("Excess arguments.");
965 if (detect_container(NULL) > 0) {
968 /* All /proc/cmdline arguments the kernel didn't
969 * understand it passed to us. We're not really
970 * interested in that usually since /proc/cmdline is
971 * more interesting and complete. With one exception:
972 * if we are run in a container /proc/cmdline is not
973 * relevant for the container, hence we rely on argv[]
976 for (a = argv; a < argv + argc; a++)
977 if ((r = parse_proc_cmdline_word(*a)) < 0) {
978 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
986 static int help(void) {
988 printf("%s [OPTIONS...]\n\n"
989 "Starts up and maintains the system or user services.\n\n"
990 " -h --help Show this help\n"
991 " --test Determine startup sequence, dump it and exit\n"
992 " --dump-configuration-items Dump understood unit configuration items\n"
993 " --unit=UNIT Set default unit\n"
994 " --system Run a system instance, even if PID != 1\n"
995 " --user Run a user instance\n"
996 " --dump-core[=0|1] Dump core on crash\n"
997 " --crash-shell[=0|1] Run shell on crash\n"
998 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
999 " --show-status[=0|1] Show status updates on the console during bootup\n"
1000 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1001 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1002 " --log-color[=0|1] Highlight important log messages\n"
1003 " --log-location[=0|1] Include code location in log messages\n"
1004 " --default-standard-output= Set default standard output for services\n"
1005 " --default-standard-error= Set default standard error output for services\n",
1006 program_invocation_short_name);
1011 static int version(void) {
1012 puts(PACKAGE_STRING);
1013 puts(SYSTEMD_FEATURES);
1018 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1027 r = manager_open_serialization(m, &f);
1029 log_error("Failed to create serialization file: %s", strerror(-r));
1033 /* Make sure nothing is really destructed when we shut down */
1035 bus_broadcast_reloading(m, true);
1040 log_error("Failed to allocate fd set: %s", strerror(-r));
1044 r = manager_serialize(m, f, fds, switching_root);
1046 log_error("Failed to serialize state: %s", strerror(-r));
1050 if (fseeko(f, 0, SEEK_SET) < 0) {
1051 log_error("Failed to rewind serialization fd: %m");
1055 r = fd_cloexec(fileno(f), false);
1057 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1061 r = fdset_cloexec(fds, false);
1063 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1081 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1085 assert(saved_rlimit);
1087 /* Save the original RLIMIT_NOFILE so that we can reset it
1088 * later when transitioning from the initrd to the main
1089 * systemd or suchlike. */
1090 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1091 log_error("Reading RLIMIT_NOFILE failed: %m");
1095 /* Make sure forked processes get the default kernel setting */
1096 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1099 rl = newdup(struct rlimit, saved_rlimit, 1);
1103 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1106 /* Bump up the resource limit for ourselves substantially */
1107 nl.rlim_cur = nl.rlim_max = 64*1024;
1108 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1110 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1117 static void test_mtab(void) {
1120 /* Check that /etc/mtab is a symlink */
1122 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1125 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1132 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1133 "This is not supported anymore. "
1134 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1137 static void test_usr(void) {
1139 /* Check that /usr is not a separate fs */
1141 if (dir_is_empty("/usr") <= 0)
1144 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1145 "Some things will probably break (sometimes even silently) in mysterious ways. "
1146 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1149 static void test_cgroups(void) {
1151 if (access("/proc/cgroups", F_OK) >= 0)
1154 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1155 "Systems without control groups are not supported. "
1156 "We will now sleep for 10s, and then continue boot-up. "
1157 "Expect breakage and please do not file bugs. "
1158 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1159 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1164 static int initialize_join_controllers(void) {
1165 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1166 * + "net_prio". We'd like to add "cpuset" to the mix, but
1167 * "cpuset" does't really work for groups with no initialized
1170 arg_join_controllers = new(char**, 3);
1171 if (!arg_join_controllers)
1174 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1175 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1176 arg_join_controllers[2] = NULL;
1178 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1179 free_join_controllers();
1186 int main(int argc, char *argv[]) {
1188 int r, retval = EXIT_FAILURE;
1189 usec_t before_startup, after_startup;
1190 char timespan[FORMAT_TIMESPAN_MAX];
1192 bool reexecute = false;
1193 const char *shutdown_verb = NULL;
1194 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1195 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1196 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1197 static char systemd[] = "systemd";
1198 bool skip_setup = false;
1200 bool loaded_policy = false;
1201 bool arm_reboot_watchdog = false;
1202 bool queue_default_job = false;
1203 char *switch_root_dir = NULL, *switch_root_init = NULL;
1204 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1206 #ifdef HAVE_SYSV_COMPAT
1207 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1208 /* This is compatibility support for SysV, where
1209 * calling init as a user is identical to telinit. */
1212 execv(SYSTEMCTL_BINARY_PATH, argv);
1213 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1218 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1219 dual_timestamp_get(&userspace_timestamp);
1221 /* Determine if this is a reexecution or normal bootup. We do
1222 * the full command line parsing much later, so let's just
1223 * have a quick peek here. */
1224 if (strv_find(argv+1, "--deserialize"))
1227 /* If we have switched root, do all the special setup
1229 if (strv_find(argv+1, "--switched-root"))
1232 /* If we get started via the /sbin/init symlink then we are
1233 called 'init'. After a subsequent reexecution we are then
1234 called 'systemd'. That is confusing, hence let's call us
1235 systemd right-away. */
1236 program_invocation_short_name = systemd;
1237 prctl(PR_SET_NAME, systemd);
1242 log_show_color(isatty(STDERR_FILENO) > 0);
1244 /* Disable the umask logic */
1248 if (getpid() == 1 && detect_container(NULL) <= 0) {
1250 /* Running outside of a container as PID 1 */
1251 arg_running_as = SYSTEMD_SYSTEM;
1253 log_set_target(LOG_TARGET_KMSG);
1257 initrd_timestamp = userspace_timestamp;
1260 mount_setup_early();
1261 if (selinux_setup(&loaded_policy) < 0)
1263 if (ima_setup() < 0)
1265 if (smack_setup() < 0)
1269 if (label_init(NULL) < 0)
1273 if (hwclock_is_localtime() > 0) {
1276 /* The first-time call to settimeofday() does a time warp in the kernel */
1277 r = hwclock_set_timezone(&min);
1279 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1281 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1282 } else if (!in_initrd()) {
1284 * Do dummy first-time call to seal the kernel's time warp magic
1286 * Do not call this this from inside the initrd. The initrd might not
1287 * carry /etc/adjtime with LOCAL, but the real system could be set up
1288 * that way. In such case, we need to delay the time-warp or the sealing
1289 * until we reach the real system.
1291 hwclock_reset_timezone();
1293 /* Tell the kernel our timezone */
1294 r = hwclock_set_timezone(NULL);
1296 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1300 /* Set the default for later on, but don't actually
1301 * open the logs like this for now. Note that if we
1302 * are transitioning from the initrd there might still
1303 * be journal fd open, and we shouldn't attempt
1304 * opening that before we parsed /proc/cmdline which
1305 * might redirect output elsewhere. */
1306 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1308 } else if (getpid() == 1) {
1309 /* Running inside a container, as PID 1 */
1310 arg_running_as = SYSTEMD_SYSTEM;
1311 log_set_target(LOG_TARGET_CONSOLE);
1314 /* For the later on, see above... */
1315 log_set_target(LOG_TARGET_JOURNAL);
1317 /* clear the kernel timestamp,
1318 * because we are in a container */
1319 kernel_timestamp.monotonic = 0ULL;
1320 kernel_timestamp.realtime = 0ULL;
1323 /* Running as user instance */
1324 arg_running_as = SYSTEMD_USER;
1325 log_set_target(LOG_TARGET_AUTO);
1328 /* clear the kernel timestamp,
1329 * because we are not PID 1 */
1330 kernel_timestamp.monotonic = 0ULL;
1331 kernel_timestamp.realtime = 0ULL;
1334 /* Initialize default unit */
1335 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1337 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1341 r = initialize_join_controllers();
1345 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1346 * /proc/$PID/fd is available. */
1347 if (getpid() == 1) {
1348 r = mount_setup(loaded_policy);
1353 /* Reset all signal handlers. */
1354 assert_se(reset_all_signal_handlers() == 0);
1356 ignore_signals(SIGNALS_IGNORE, -1);
1358 if (parse_config_file() < 0)
1361 if (arg_running_as == SYSTEMD_SYSTEM)
1362 if (parse_proc_cmdline() < 0)
1365 log_parse_environment();
1367 if (parse_argv(argc, argv) < 0)
1370 if (arg_action == ACTION_TEST &&
1372 log_error("Don't run test mode as root.");
1376 if (arg_running_as == SYSTEMD_USER &&
1377 arg_action == ACTION_RUN &&
1379 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1383 if (arg_running_as == SYSTEMD_SYSTEM &&
1384 arg_action == ACTION_RUN &&
1385 running_in_chroot() > 0) {
1386 log_error("Cannot be run in a chroot() environment.");
1390 if (arg_action == ACTION_HELP) {
1393 } else if (arg_action == ACTION_VERSION) {
1396 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1397 unit_dump_config_items(stdout);
1398 retval = EXIT_SUCCESS;
1400 } else if (arg_action == ACTION_DONE) {
1401 retval = EXIT_SUCCESS;
1405 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1407 /* Close logging fds, in order not to confuse fdset below */
1410 /* Remember open file descriptors for later deserialization */
1411 r = fdset_new_fill(&fds);
1413 log_error("Failed to allocate fd set: %s", strerror(-r));
1416 fdset_cloexec(fds, true);
1419 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1421 if (arg_running_as == SYSTEMD_SYSTEM)
1422 /* Become a session leader if we aren't one yet. */
1425 /* Move out of the way, so that we won't block unmounts */
1426 assert_se(chdir("/") == 0);
1428 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1429 dbus_connection_set_change_sigpipe(FALSE);
1431 /* Reset the console, but only if this is really init and we
1432 * are freshly booted */
1433 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1434 console_setup(getpid() == 1 && !skip_setup);
1436 /* Open the logging devices, if possible and necessary */
1439 /* Make sure we leave a core dump without panicing the
1441 if (getpid() == 1) {
1442 install_crash_handler();
1444 r = mount_cgroup_controllers(arg_join_controllers);
1449 if (arg_running_as == SYSTEMD_SYSTEM) {
1450 const char *virtualization = NULL;
1452 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1454 detect_virtualization(&virtualization);
1456 log_info("Detected virtualization '%s'.", virtualization);
1459 log_info("Running in initial RAM disk.");
1462 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1464 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1465 if (arg_show_status || plymouth_running())
1480 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1481 watchdog_set_timeout(&arg_runtime_watchdog);
1483 if (arg_timer_slack_nsec != (nsec_t) -1)
1484 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1485 log_error("Failed to adjust timer slack: %m");
1487 if (arg_capability_bounding_set_drop) {
1488 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1490 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1493 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1495 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1500 if (arg_running_as == SYSTEMD_USER) {
1501 /* Become reaper of our children */
1502 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1503 log_warning("Failed to make us a subreaper: %m");
1504 if (errno == EINVAL)
1505 log_info("Perhaps the kernel version is too old (< 3.4?)");
1509 if (arg_running_as == SYSTEMD_SYSTEM)
1510 bump_rlimit_nofile(&saved_rlimit_nofile);
1512 r = manager_new(arg_running_as, !!serialization, &m);
1514 log_error("Failed to allocate manager object: %s", strerror(-r));
1518 m->confirm_spawn = arg_confirm_spawn;
1519 m->default_std_output = arg_default_std_output;
1520 m->default_std_error = arg_default_std_error;
1521 m->runtime_watchdog = arg_runtime_watchdog;
1522 m->shutdown_watchdog = arg_shutdown_watchdog;
1523 m->userspace_timestamp = userspace_timestamp;
1524 m->kernel_timestamp = kernel_timestamp;
1525 m->initrd_timestamp = initrd_timestamp;
1527 manager_set_default_rlimits(m, arg_default_rlimit);
1529 if (arg_default_environment)
1530 manager_environment_add(m, arg_default_environment);
1532 manager_set_show_status(m, arg_show_status);
1534 /* Remember whether we should queue the default job */
1535 queue_default_job = !serialization || arg_switched_root;
1537 before_startup = now(CLOCK_MONOTONIC);
1539 r = manager_startup(m, serialization, fds);
1541 log_error("Failed to fully start up daemon: %s", strerror(-r));
1543 /* This will close all file descriptors that were opened, but
1544 * not claimed by any unit. */
1548 if (serialization) {
1549 fclose(serialization);
1550 serialization = NULL;
1553 if (queue_default_job) {
1555 Unit *target = NULL;
1556 Job *default_unit_job;
1558 dbus_error_init(&error);
1560 log_debug("Activating default unit: %s", arg_default_unit);
1562 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1564 log_error("Failed to load default target: %s", bus_error(&error, r));
1565 dbus_error_free(&error);
1566 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1567 log_error("Failed to load default target: %s", strerror(-target->load_error));
1568 else if (target->load_state == UNIT_MASKED)
1569 log_error("Default target masked.");
1571 if (!target || target->load_state != UNIT_LOADED) {
1572 log_info("Trying to load rescue target...");
1574 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1576 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1577 dbus_error_free(&error);
1579 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1580 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1582 } else if (target->load_state == UNIT_MASKED) {
1583 log_error("Rescue target masked.");
1588 assert(target->load_state == UNIT_LOADED);
1590 if (arg_action == ACTION_TEST) {
1591 printf("-> By units:\n");
1592 manager_dump_units(m, stdout, "\t");
1595 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1597 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1598 dbus_error_free(&error);
1600 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1602 log_error("Failed to start default target: %s", bus_error(&error, r));
1603 dbus_error_free(&error);
1607 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1608 dbus_error_free(&error);
1612 m->default_unit_job_id = default_unit_job->id;
1614 after_startup = now(CLOCK_MONOTONIC);
1615 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1616 "Loaded units and determined initial transaction in %s.",
1617 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1619 if (arg_action == ACTION_TEST) {
1620 printf("-> By jobs:\n");
1621 manager_dump_jobs(m, stdout, "\t");
1622 retval = EXIT_SUCCESS;
1628 r = manager_loop(m);
1630 log_error("Failed to run mainloop: %s", strerror(-r));
1634 switch (m->exit_code) {
1637 retval = EXIT_SUCCESS;
1641 case MANAGER_RELOAD:
1642 log_info("Reloading.");
1643 r = manager_reload(m);
1645 log_error("Failed to reload: %s", strerror(-r));
1648 case MANAGER_REEXECUTE:
1650 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1654 log_notice("Reexecuting.");
1657 case MANAGER_SWITCH_ROOT:
1658 /* Steal the switch root parameters */
1659 switch_root_dir = m->switch_root;
1660 switch_root_init = m->switch_root_init;
1661 m->switch_root = m->switch_root_init = NULL;
1663 if (!switch_root_init)
1664 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1668 log_notice("Switching root.");
1671 case MANAGER_REBOOT:
1672 case MANAGER_POWEROFF:
1674 case MANAGER_KEXEC: {
1675 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1676 [MANAGER_REBOOT] = "reboot",
1677 [MANAGER_POWEROFF] = "poweroff",
1678 [MANAGER_HALT] = "halt",
1679 [MANAGER_KEXEC] = "kexec"
1682 assert_se(shutdown_verb = table[m->exit_code]);
1683 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1685 log_notice("Shutting down.");
1690 assert_not_reached("Unknown exit code.");
1698 for (j = 0; j < RLIMIT_NLIMITS; j++)
1699 free(arg_default_rlimit[j]);
1701 free(arg_default_unit);
1702 free_join_controllers();
1709 unsigned i, args_size;
1711 /* Close and disarm the watchdog, so that the new
1712 * instance can reinitialize it, but doesn't get
1713 * rebooted while we do that */
1714 watchdog_close(true);
1716 /* Reset the RLIMIT_NOFILE to the kernel default, so
1717 * that the new systemd can pass the kernel default to
1718 * its child processes */
1719 if (saved_rlimit_nofile.rlim_cur > 0)
1720 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1722 if (switch_root_dir) {
1723 /* Kill all remaining processes from the
1724 * initrd, but don't wait for them, so that we
1725 * can handle the SIGCHLD for them after
1727 broadcast_signal(SIGTERM, false);
1729 /* And switch root */
1730 r = switch_root(switch_root_dir);
1732 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1735 args_size = MAX(6, argc+1);
1736 args = newa(const char*, args_size);
1738 if (!switch_root_init) {
1741 /* First try to spawn ourselves with the right
1742 * path, and with full serialization. We do
1743 * this only if the user didn't specify an
1744 * explicit init to spawn. */
1746 assert(serialization);
1749 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1753 args[i++] = SYSTEMD_BINARY_PATH;
1754 if (switch_root_dir)
1755 args[i++] = "--switched-root";
1756 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1757 args[i++] = "--deserialize";
1761 /* do not pass along the environment we inherit from the kernel or initrd */
1762 if (switch_root_dir)
1765 assert(i <= args_size);
1766 execv(args[0], (char* const*) args);
1769 /* Try the fallback, if there is any, without any
1770 * serialization. We pass the original argv[] and
1771 * envp[]. (Well, modulo the ordering changes due to
1772 * getopt() in argv[], and some cleanups in envp[],
1773 * but let's hope that doesn't matter.) */
1775 if (serialization) {
1776 fclose(serialization);
1777 serialization = NULL;
1785 /* Reopen the console */
1786 make_console_stdio();
1788 for (j = 1, i = 1; j < argc; j++)
1789 args[i++] = argv[j];
1791 assert(i <= args_size);
1793 if (switch_root_init) {
1794 args[0] = switch_root_init;
1795 execv(args[0], (char* const*) args);
1796 log_warning("Failed to execute configured init, trying fallback: %m");
1799 args[0] = "/sbin/init";
1800 execv(args[0], (char* const*) args);
1802 if (errno == ENOENT) {
1803 log_warning("No /sbin/init, trying fallback");
1805 args[0] = "/bin/sh";
1807 execv(args[0], (char* const*) args);
1808 log_error("Failed to execute /bin/sh, giving up: %m");
1810 log_warning("Failed to execute /sbin/init, giving up: %m");
1814 fclose(serialization);
1819 if (shutdown_verb) {
1820 const char * command_line[] = {
1821 SYSTEMD_SHUTDOWN_BINARY_PATH,
1827 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1830 /* If we reboot let's set the shutdown
1831 * watchdog and tell the shutdown binary to
1832 * repeatedly ping it */
1833 watchdog_set_timeout(&arg_shutdown_watchdog);
1834 watchdog_close(false);
1836 /* Tell the binary how often to ping */
1837 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1840 env_block = strv_append(environ, e);
1842 env_block = strv_copy(environ);
1843 watchdog_close(true);
1846 /* Avoid the creation of new processes forked by the
1847 * kernel; at this point, we will not listen to the
1849 if (detect_container(NULL) <= 0)
1850 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1852 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1854 log_error("Failed to execute shutdown binary, freezing: %m");