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_default_restart_usec = DEFAULT_RESTART_USEC;
94 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
95 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
96 static usec_t arg_runtime_watchdog = 0;
97 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
98 static char **arg_default_environment = NULL;
99 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
100 static uint64_t arg_capability_bounding_set_drop = 0;
101 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
103 static FILE* serialization = NULL;
105 static void nop_handler(int sig) {
108 _noreturn_ static void crash(int sig) {
111 /* Pass this on immediately, if this is not PID 1 */
113 else if (!arg_dump_core)
114 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
116 struct sigaction sa = {
117 .sa_handler = nop_handler,
118 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
122 /* We want to wait for the core process, hence let's enable SIGCHLD */
123 sigaction(SIGCHLD, &sa, NULL);
127 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
130 struct rlimit rl = {};
132 /* Enable default signal handler for core dump */
134 sa.sa_handler = SIG_DFL;
135 sigaction(sig, &sa, NULL);
137 /* Don't limit the core dump size */
138 rl.rlim_cur = RLIM_INFINITY;
139 rl.rlim_max = RLIM_INFINITY;
140 setrlimit(RLIMIT_CORE, &rl);
142 /* Just to be sure... */
145 /* Raise the signal again */
148 assert_not_reached("We shouldn't be here...");
155 /* Order things nicely. */
156 r = wait_for_terminate(pid, &status);
158 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
159 else if (status.si_code != CLD_DUMPED)
160 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
162 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
167 chvt(arg_crash_chvt);
169 if (arg_crash_shell) {
170 struct sigaction sa = {
171 .sa_handler = SIG_IGN,
172 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
176 log_info("Executing crash shell in 10s...");
179 /* Let the kernel reap children for us */
180 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
184 log_error("Failed to fork off crash shell: %m");
186 make_console_stdio();
187 execl("/bin/sh", "/bin/sh", NULL);
189 log_error("execl() failed: %m");
193 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
196 log_info("Freezing execution.");
200 static void install_crash_handler(void) {
201 struct sigaction sa = {
203 .sa_flags = SA_NODEFER,
206 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
209 static int console_setup(bool do_reset) {
212 /* If we are init, we connect stdin/stdout/stderr to /dev/null
213 * and make sure we don't have a controlling tty. */
220 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
222 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
226 /* We don't want to force text mode.
227 * plymouth may be showing pictures already from initrd. */
228 r = reset_terminal_fd(tty_fd, false);
230 log_error("Failed to reset /dev/console: %s", strerror(-r));
232 close_nointr_nofail(tty_fd);
236 static int set_default_unit(const char *u) {
245 free(arg_default_unit);
246 arg_default_unit = c;
251 static int parse_proc_cmdline_word(const char *word) {
253 static const char * const rlmap[] = {
254 "emergency", SPECIAL_EMERGENCY_TARGET,
255 "-b", SPECIAL_EMERGENCY_TARGET,
256 "single", SPECIAL_RESCUE_TARGET,
257 "-s", SPECIAL_RESCUE_TARGET,
258 "s", SPECIAL_RESCUE_TARGET,
259 "S", SPECIAL_RESCUE_TARGET,
260 "1", SPECIAL_RESCUE_TARGET,
261 "2", SPECIAL_RUNLEVEL2_TARGET,
262 "3", SPECIAL_RUNLEVEL3_TARGET,
263 "4", SPECIAL_RUNLEVEL4_TARGET,
264 "5", SPECIAL_RUNLEVEL5_TARGET,
269 if (startswith(word, "systemd.unit=")) {
272 return set_default_unit(word + 13);
274 } else if (startswith(word, "rd.systemd.unit=")) {
277 return set_default_unit(word + 16);
279 } else if (startswith(word, "systemd.log_target=")) {
281 if (log_set_target_from_string(word + 19) < 0)
282 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
284 } else if (startswith(word, "systemd.log_level=")) {
286 if (log_set_max_level_from_string(word + 18) < 0)
287 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
289 } else if (startswith(word, "systemd.log_color=")) {
291 if (log_show_color_from_string(word + 18) < 0)
292 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
294 } else if (startswith(word, "systemd.log_location=")) {
296 if (log_show_location_from_string(word + 21) < 0)
297 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
299 } else if (startswith(word, "systemd.dump_core=")) {
302 if ((r = parse_boolean(word + 18)) < 0)
303 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
307 } else if (startswith(word, "systemd.crash_shell=")) {
310 if ((r = parse_boolean(word + 20)) < 0)
311 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
315 } else if (startswith(word, "systemd.confirm_spawn=")) {
318 if ((r = parse_boolean(word + 22)) < 0)
319 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
321 arg_confirm_spawn = r;
323 } else if (startswith(word, "systemd.crash_chvt=")) {
326 if (safe_atoi(word + 19, &k) < 0)
327 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
331 } else if (startswith(word, "systemd.show_status=")) {
334 if ((r = parse_boolean(word + 20)) < 0)
335 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
338 } else if (startswith(word, "systemd.default_standard_output=")) {
341 if ((r = exec_output_from_string(word + 32)) < 0)
342 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
344 arg_default_std_output = r;
345 } else if (startswith(word, "systemd.default_standard_error=")) {
348 if ((r = exec_output_from_string(word + 31)) < 0)
349 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
351 arg_default_std_error = r;
352 } else if (startswith(word, "systemd.setenv=")) {
353 _cleanup_free_ char *cenv = NULL;
355 cenv = strdup(word + 15);
359 if (env_assignment_is_valid(cenv)) {
362 env = strv_env_set(arg_default_environment, cenv);
364 arg_default_environment = env;
366 log_warning("Setting environment variable '%s' failed, ignoring: %m", cenv);
368 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
370 } else if (startswith(word, "systemd.") ||
371 (in_initrd() && startswith(word, "rd.systemd."))) {
375 /* Ignore systemd.journald.xyz and friends */
377 if (startswith(c, "rd."))
379 if (startswith(c, "systemd."))
381 if (c[strcspn(c, ".=")] != '.') {
383 log_warning("Unknown kernel switch %s. Ignoring.", word);
385 log_info("Supported kernel switches:\n"
386 "systemd.unit=UNIT Default unit to start\n"
387 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
388 "systemd.dump_core=0|1 Dump core on crash\n"
389 "systemd.crash_shell=0|1 Run shell on crash\n"
390 "systemd.crash_chvt=N Change to VT #N on crash\n"
391 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
392 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
393 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
395 "systemd.log_level=LEVEL Log level\n"
396 "systemd.log_color=0|1 Highlight important log messages\n"
397 "systemd.log_location=0|1 Include code location in log messages\n"
398 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
399 " Set default log output for services\n"
400 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
401 " Set default log error output for services\n"
402 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
405 } else if (streq(word, "quiet"))
406 arg_show_status = false;
407 else if (streq(word, "debug")) {
408 /* Log to kmsg, the journal socket will fill up before the
409 * journal is started and tools running during that time
410 * will block with every log message for for 60 seconds,
411 * before they give up. */
412 log_set_max_level(LOG_DEBUG);
413 log_set_target(LOG_TARGET_KMSG);
414 } else if (!in_initrd()) {
417 /* SysV compatibility */
418 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
419 if (streq(word, rlmap[i]))
420 return set_default_unit(rlmap[i+1]);
426 #define DEFINE_SETTER(name, func, descr) \
427 static int name(const char *unit, \
428 const char *filename, \
430 const char *section, \
431 const char *lvalue, \
433 const char *rvalue, \
445 log_syntax(unit, LOG_ERR, filename, line, -r, \
446 "Invalid " descr "'%s': %s", \
447 rvalue, strerror(-r)); \
452 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
453 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
454 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
455 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
458 static int config_parse_cpu_affinity2(const char *unit,
459 const char *filename,
478 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
483 if (!(t = strndup(w, l)))
486 r = safe_atou(t, &cpu);
490 if (!(c = cpu_set_malloc(&ncpus)))
493 if (r < 0 || cpu >= ncpus) {
494 log_syntax(unit, LOG_ERR, filename, line, -r,
495 "Failed to parse CPU affinity '%s'", rvalue);
500 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
504 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
505 log_warning_unit(unit, "Failed to set CPU affinity: %m");
513 static void strv_free_free(char ***l) {
525 static void free_join_controllers(void) {
526 strv_free_free(arg_join_controllers);
527 arg_join_controllers = NULL;
530 static int config_parse_join_controllers(const char *unit,
531 const char *filename,
548 free_join_controllers();
550 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
553 s = strndup(w, length);
557 l = strv_split(s, ",");
562 if (strv_length(l) <= 1) {
567 if (!arg_join_controllers) {
568 arg_join_controllers = new(char**, 2);
569 if (!arg_join_controllers) {
574 arg_join_controllers[0] = l;
575 arg_join_controllers[1] = NULL;
582 t = new0(char**, n+2);
590 for (a = arg_join_controllers; *a; a++) {
592 if (strv_overlap(*a, l)) {
595 c = strv_merge(*a, l);
618 t[n++] = strv_uniq(l);
620 strv_free_free(arg_join_controllers);
621 arg_join_controllers = t;
628 static int parse_config_file(void) {
630 const ConfigTableItem items[] = {
631 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
632 { "Manager", "LogTarget", config_parse_target, 0, NULL },
633 { "Manager", "LogColor", config_parse_color, 0, NULL },
634 { "Manager", "LogLocation", config_parse_location, 0, NULL },
635 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
636 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
637 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
638 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
639 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
640 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
641 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
642 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
643 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
644 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
645 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
646 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
647 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
648 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
649 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
650 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
651 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
652 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
653 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
654 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
655 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
656 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
657 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
658 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
659 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
660 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
661 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
662 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
663 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
664 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
665 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
666 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
667 { NULL, NULL, NULL, 0, NULL }
670 _cleanup_fclose_ FILE *f;
674 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
680 log_warning("Failed to open configuration file '%s': %m", fn);
684 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
686 log_warning("Failed to parse configuration file: %s", strerror(-r));
691 static int parse_proc_cmdline(void) {
692 _cleanup_free_ char *line = NULL;
697 r = proc_cmdline(&line);
699 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
703 FOREACH_WORD_QUOTED(w, l, line, state) {
704 _cleanup_free_ char *word;
706 word = strndup(w, l);
710 r = parse_proc_cmdline_word(word);
712 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
720 static int parse_argv(int argc, char *argv[]) {
723 ARG_LOG_LEVEL = 0x100,
732 ARG_DUMP_CONFIGURATION_ITEMS,
739 ARG_DEFAULT_STD_OUTPUT,
740 ARG_DEFAULT_STD_ERROR
743 static const struct option options[] = {
744 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
745 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
746 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
747 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
748 { "unit", required_argument, NULL, ARG_UNIT },
749 { "system", no_argument, NULL, ARG_SYSTEM },
750 { "user", no_argument, NULL, ARG_USER },
751 { "test", no_argument, NULL, ARG_TEST },
752 { "help", no_argument, NULL, 'h' },
753 { "version", no_argument, NULL, ARG_VERSION },
754 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
755 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
756 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
757 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
758 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
759 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
760 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
761 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
762 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
774 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
779 if ((r = log_set_max_level_from_string(optarg)) < 0) {
780 log_error("Failed to parse log level %s.", optarg);
788 if ((r = log_set_target_from_string(optarg)) < 0) {
789 log_error("Failed to parse log target %s.", optarg);
798 if ((r = log_show_color_from_string(optarg)) < 0) {
799 log_error("Failed to parse log color setting %s.", optarg);
803 log_show_color(true);
807 case ARG_LOG_LOCATION:
810 if ((r = log_show_location_from_string(optarg)) < 0) {
811 log_error("Failed to parse log location setting %s.", optarg);
815 log_show_location(true);
819 case ARG_DEFAULT_STD_OUTPUT:
821 if ((r = exec_output_from_string(optarg)) < 0) {
822 log_error("Failed to parse default standard output setting %s.", optarg);
825 arg_default_std_output = r;
828 case ARG_DEFAULT_STD_ERROR:
830 if ((r = exec_output_from_string(optarg)) < 0) {
831 log_error("Failed to parse default standard error output setting %s.", optarg);
834 arg_default_std_error = r;
839 if ((r = set_default_unit(optarg)) < 0) {
840 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
847 arg_running_as = SYSTEMD_SYSTEM;
851 arg_running_as = SYSTEMD_USER;
855 arg_action = ACTION_TEST;
859 arg_action = ACTION_VERSION;
862 case ARG_DUMP_CONFIGURATION_ITEMS:
863 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
867 r = optarg ? parse_boolean(optarg) : 1;
869 log_error("Failed to parse dump core boolean %s.", optarg);
875 case ARG_CRASH_SHELL:
876 r = optarg ? parse_boolean(optarg) : 1;
878 log_error("Failed to parse crash shell boolean %s.", optarg);
884 case ARG_CONFIRM_SPAWN:
885 r = optarg ? parse_boolean(optarg) : 1;
887 log_error("Failed to parse confirm spawn boolean %s.", optarg);
890 arg_confirm_spawn = r;
893 case ARG_SHOW_STATUS:
894 r = optarg ? parse_boolean(optarg) : 1;
896 log_error("Failed to parse show status boolean %s.", optarg);
902 case ARG_DESERIALIZE: {
906 r = safe_atoi(optarg, &fd);
907 if (r < 0 || fd < 0) {
908 log_error("Failed to parse deserialize option %s.", optarg);
909 return r < 0 ? r : -EINVAL;
912 fd_cloexec(fd, true);
916 log_error("Failed to open serialization fd: %m");
921 fclose(serialization);
928 case ARG_SWITCHED_ROOT:
929 arg_switched_root = true;
933 arg_action = ACTION_HELP;
937 log_set_max_level(LOG_DEBUG);
943 /* Just to eat away the sysvinit kernel
944 * cmdline args without getopt() error
945 * messages that we'll parse in
946 * parse_proc_cmdline_word() or ignore. */
951 log_error("Unknown option code %c", c);
958 if (optind < argc && getpid() != 1) {
959 /* Hmm, when we aren't run as init system
960 * let's complain about excess arguments */
962 log_error("Excess arguments.");
966 if (detect_container(NULL) > 0) {
969 /* All /proc/cmdline arguments the kernel didn't
970 * understand it passed to us. We're not really
971 * interested in that usually since /proc/cmdline is
972 * more interesting and complete. With one exception:
973 * if we are run in a container /proc/cmdline is not
974 * relevant for the container, hence we rely on argv[]
977 for (a = argv; a < argv + argc; a++) {
978 r = parse_proc_cmdline_word(*a);
980 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
989 static int help(void) {
991 printf("%s [OPTIONS...]\n\n"
992 "Starts up and maintains the system or user services.\n\n"
993 " -h --help Show this help\n"
994 " --test Determine startup sequence, dump it and exit\n"
995 " --dump-configuration-items Dump understood unit configuration items\n"
996 " --unit=UNIT Set default unit\n"
997 " --system Run a system instance, even if PID != 1\n"
998 " --user Run a user instance\n"
999 " --dump-core[=0|1] Dump core on crash\n"
1000 " --crash-shell[=0|1] Run shell on crash\n"
1001 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1002 " --show-status[=0|1] Show status updates on the console during bootup\n"
1003 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1004 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1005 " --log-color[=0|1] Highlight important log messages\n"
1006 " --log-location[=0|1] Include code location in log messages\n"
1007 " --default-standard-output= Set default standard output for services\n"
1008 " --default-standard-error= Set default standard error output for services\n",
1009 program_invocation_short_name);
1014 static int version(void) {
1015 puts(PACKAGE_STRING);
1016 puts(SYSTEMD_FEATURES);
1021 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1030 r = manager_open_serialization(m, &f);
1032 log_error("Failed to create serialization file: %s", strerror(-r));
1036 /* Make sure nothing is really destructed when we shut down */
1038 bus_broadcast_reloading(m, true);
1043 log_error("Failed to allocate fd set: %s", strerror(-r));
1047 r = manager_serialize(m, f, fds, switching_root);
1049 log_error("Failed to serialize state: %s", strerror(-r));
1053 if (fseeko(f, 0, SEEK_SET) < 0) {
1054 log_error("Failed to rewind serialization fd: %m");
1058 r = fd_cloexec(fileno(f), false);
1060 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1064 r = fdset_cloexec(fds, false);
1066 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1084 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1088 assert(saved_rlimit);
1090 /* Save the original RLIMIT_NOFILE so that we can reset it
1091 * later when transitioning from the initrd to the main
1092 * systemd or suchlike. */
1093 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1094 log_error("Reading RLIMIT_NOFILE failed: %m");
1098 /* Make sure forked processes get the default kernel setting */
1099 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1102 rl = newdup(struct rlimit, saved_rlimit, 1);
1106 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1109 /* Bump up the resource limit for ourselves substantially */
1110 nl.rlim_cur = nl.rlim_max = 64*1024;
1111 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1113 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1120 static void test_mtab(void) {
1123 /* Check that /etc/mtab is a symlink */
1125 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1128 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1135 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1136 "This is not supported anymore. "
1137 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1140 static void test_usr(void) {
1142 /* Check that /usr is not a separate fs */
1144 if (dir_is_empty("/usr") <= 0)
1147 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1148 "Some things will probably break (sometimes even silently) in mysterious ways. "
1149 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1152 static void test_cgroups(void) {
1154 if (access("/proc/cgroups", F_OK) >= 0)
1157 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1158 "Systems without control groups are not supported. "
1159 "We will now sleep for 10s, and then continue boot-up. "
1160 "Expect breakage and please do not file bugs. "
1161 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1162 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1167 static int initialize_join_controllers(void) {
1168 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1169 * + "net_prio". We'd like to add "cpuset" to the mix, but
1170 * "cpuset" does't really work for groups with no initialized
1173 arg_join_controllers = new(char**, 3);
1174 if (!arg_join_controllers)
1177 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1178 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1179 arg_join_controllers[2] = NULL;
1181 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1182 free_join_controllers();
1189 int main(int argc, char *argv[]) {
1191 int r, retval = EXIT_FAILURE;
1192 usec_t before_startup, after_startup;
1193 char timespan[FORMAT_TIMESPAN_MAX];
1195 bool reexecute = false;
1196 const char *shutdown_verb = NULL;
1197 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1198 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1199 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1200 static char systemd[] = "systemd";
1201 bool skip_setup = false;
1203 bool loaded_policy = false;
1204 bool arm_reboot_watchdog = false;
1205 bool queue_default_job = false;
1206 char *switch_root_dir = NULL, *switch_root_init = NULL;
1207 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1209 #ifdef HAVE_SYSV_COMPAT
1210 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1211 /* This is compatibility support for SysV, where
1212 * calling init as a user is identical to telinit. */
1215 execv(SYSTEMCTL_BINARY_PATH, argv);
1216 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1221 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1222 dual_timestamp_get(&userspace_timestamp);
1224 /* Determine if this is a reexecution or normal bootup. We do
1225 * the full command line parsing much later, so let's just
1226 * have a quick peek here. */
1227 if (strv_find(argv+1, "--deserialize"))
1230 /* If we have switched root, do all the special setup
1232 if (strv_find(argv+1, "--switched-root"))
1235 /* If we get started via the /sbin/init symlink then we are
1236 called 'init'. After a subsequent reexecution we are then
1237 called 'systemd'. That is confusing, hence let's call us
1238 systemd right-away. */
1239 program_invocation_short_name = systemd;
1240 prctl(PR_SET_NAME, systemd);
1245 log_show_color(isatty(STDERR_FILENO) > 0);
1247 /* Disable the umask logic */
1251 if (getpid() == 1 && detect_container(NULL) <= 0) {
1253 /* Running outside of a container as PID 1 */
1254 arg_running_as = SYSTEMD_SYSTEM;
1256 log_set_target(LOG_TARGET_KMSG);
1260 initrd_timestamp = userspace_timestamp;
1263 mount_setup_early();
1264 if (selinux_setup(&loaded_policy) < 0)
1266 if (ima_setup() < 0)
1268 if (smack_setup() < 0)
1272 if (label_init(NULL) < 0)
1276 if (hwclock_is_localtime() > 0) {
1279 /* The first-time call to settimeofday() does a time warp in the kernel */
1280 r = hwclock_set_timezone(&min);
1282 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1284 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1285 } else if (!in_initrd()) {
1287 * Do dummy first-time call to seal the kernel's time warp magic
1289 * Do not call this this from inside the initrd. The initrd might not
1290 * carry /etc/adjtime with LOCAL, but the real system could be set up
1291 * that way. In such case, we need to delay the time-warp or the sealing
1292 * until we reach the real system.
1294 hwclock_reset_timezone();
1296 /* Tell the kernel our timezone */
1297 r = hwclock_set_timezone(NULL);
1299 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1303 /* Set the default for later on, but don't actually
1304 * open the logs like this for now. Note that if we
1305 * are transitioning from the initrd there might still
1306 * be journal fd open, and we shouldn't attempt
1307 * opening that before we parsed /proc/cmdline which
1308 * might redirect output elsewhere. */
1309 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1311 } else if (getpid() == 1) {
1312 /* Running inside a container, as PID 1 */
1313 arg_running_as = SYSTEMD_SYSTEM;
1314 log_set_target(LOG_TARGET_CONSOLE);
1317 /* For the later on, see above... */
1318 log_set_target(LOG_TARGET_JOURNAL);
1320 /* clear the kernel timestamp,
1321 * because we are in a container */
1322 kernel_timestamp.monotonic = 0ULL;
1323 kernel_timestamp.realtime = 0ULL;
1326 /* Running as user instance */
1327 arg_running_as = SYSTEMD_USER;
1328 log_set_target(LOG_TARGET_AUTO);
1331 /* clear the kernel timestamp,
1332 * because we are not PID 1 */
1333 kernel_timestamp.monotonic = 0ULL;
1334 kernel_timestamp.realtime = 0ULL;
1337 /* Initialize default unit */
1338 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1340 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1344 r = initialize_join_controllers();
1348 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1349 * /proc/$PID/fd is available. */
1350 if (getpid() == 1) {
1351 r = mount_setup(loaded_policy);
1356 /* Reset all signal handlers. */
1357 assert_se(reset_all_signal_handlers() == 0);
1359 ignore_signals(SIGNALS_IGNORE, -1);
1361 if (parse_config_file() < 0)
1364 if (arg_running_as == SYSTEMD_SYSTEM)
1365 if (parse_proc_cmdline() < 0)
1368 log_parse_environment();
1370 if (parse_argv(argc, argv) < 0)
1373 if (arg_action == ACTION_TEST &&
1375 log_error("Don't run test mode as root.");
1379 if (arg_running_as == SYSTEMD_USER &&
1380 arg_action == ACTION_RUN &&
1382 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1386 if (arg_running_as == SYSTEMD_SYSTEM &&
1387 arg_action == ACTION_RUN &&
1388 running_in_chroot() > 0) {
1389 log_error("Cannot be run in a chroot() environment.");
1393 if (arg_action == ACTION_HELP) {
1396 } else if (arg_action == ACTION_VERSION) {
1399 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1400 unit_dump_config_items(stdout);
1401 retval = EXIT_SUCCESS;
1403 } else if (arg_action == ACTION_DONE) {
1404 retval = EXIT_SUCCESS;
1408 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1410 /* Close logging fds, in order not to confuse fdset below */
1413 /* Remember open file descriptors for later deserialization */
1414 r = fdset_new_fill(&fds);
1416 log_error("Failed to allocate fd set: %s", strerror(-r));
1419 fdset_cloexec(fds, true);
1422 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1424 if (arg_running_as == SYSTEMD_SYSTEM)
1425 /* Become a session leader if we aren't one yet. */
1428 /* Move out of the way, so that we won't block unmounts */
1429 assert_se(chdir("/") == 0);
1431 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1432 dbus_connection_set_change_sigpipe(FALSE);
1434 /* Reset the console, but only if this is really init and we
1435 * are freshly booted */
1436 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1437 console_setup(getpid() == 1 && !skip_setup);
1439 /* Open the logging devices, if possible and necessary */
1442 /* Make sure we leave a core dump without panicing the
1444 if (getpid() == 1) {
1445 install_crash_handler();
1447 r = mount_cgroup_controllers(arg_join_controllers);
1452 if (arg_running_as == SYSTEMD_SYSTEM) {
1453 const char *virtualization = NULL;
1455 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1457 detect_virtualization(&virtualization);
1459 log_info("Detected virtualization '%s'.", virtualization);
1462 log_info("Running in initial RAM disk.");
1465 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1467 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1468 if (arg_show_status || plymouth_running())
1483 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1484 watchdog_set_timeout(&arg_runtime_watchdog);
1486 if (arg_timer_slack_nsec != (nsec_t) -1)
1487 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1488 log_error("Failed to adjust timer slack: %m");
1490 if (arg_capability_bounding_set_drop) {
1491 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1493 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1496 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1498 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1503 if (arg_running_as == SYSTEMD_USER) {
1504 /* Become reaper of our children */
1505 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1506 log_warning("Failed to make us a subreaper: %m");
1507 if (errno == EINVAL)
1508 log_info("Perhaps the kernel version is too old (< 3.4?)");
1512 if (arg_running_as == SYSTEMD_SYSTEM)
1513 bump_rlimit_nofile(&saved_rlimit_nofile);
1515 r = manager_new(arg_running_as, !!serialization, &m);
1517 log_error("Failed to allocate manager object: %s", strerror(-r));
1521 m->confirm_spawn = arg_confirm_spawn;
1522 m->default_std_output = arg_default_std_output;
1523 m->default_std_error = arg_default_std_error;
1524 m->default_restart_usec = arg_default_restart_usec;
1525 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1526 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1527 m->runtime_watchdog = arg_runtime_watchdog;
1528 m->shutdown_watchdog = arg_shutdown_watchdog;
1529 m->userspace_timestamp = userspace_timestamp;
1530 m->kernel_timestamp = kernel_timestamp;
1531 m->initrd_timestamp = initrd_timestamp;
1533 manager_set_default_rlimits(m, arg_default_rlimit);
1535 if (arg_default_environment)
1536 manager_environment_add(m, arg_default_environment);
1538 manager_set_show_status(m, arg_show_status);
1540 /* Remember whether we should queue the default job */
1541 queue_default_job = !serialization || arg_switched_root;
1543 before_startup = now(CLOCK_MONOTONIC);
1545 r = manager_startup(m, serialization, fds);
1547 log_error("Failed to fully start up daemon: %s", strerror(-r));
1549 /* This will close all file descriptors that were opened, but
1550 * not claimed by any unit. */
1554 if (serialization) {
1555 fclose(serialization);
1556 serialization = NULL;
1559 if (queue_default_job) {
1561 Unit *target = NULL;
1562 Job *default_unit_job;
1564 dbus_error_init(&error);
1566 log_debug("Activating default unit: %s", arg_default_unit);
1568 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1570 log_error("Failed to load default target: %s", bus_error(&error, r));
1571 dbus_error_free(&error);
1572 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1573 log_error("Failed to load default target: %s", strerror(-target->load_error));
1574 else if (target->load_state == UNIT_MASKED)
1575 log_error("Default target masked.");
1577 if (!target || target->load_state != UNIT_LOADED) {
1578 log_info("Trying to load rescue target...");
1580 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1582 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1583 dbus_error_free(&error);
1585 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1586 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1588 } else if (target->load_state == UNIT_MASKED) {
1589 log_error("Rescue target masked.");
1594 assert(target->load_state == UNIT_LOADED);
1596 if (arg_action == ACTION_TEST) {
1597 printf("-> By units:\n");
1598 manager_dump_units(m, stdout, "\t");
1601 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1603 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1604 dbus_error_free(&error);
1606 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1608 log_error("Failed to start default target: %s", bus_error(&error, r));
1609 dbus_error_free(&error);
1613 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1614 dbus_error_free(&error);
1618 m->default_unit_job_id = default_unit_job->id;
1620 after_startup = now(CLOCK_MONOTONIC);
1621 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1622 "Loaded units and determined initial transaction in %s.",
1623 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1625 if (arg_action == ACTION_TEST) {
1626 printf("-> By jobs:\n");
1627 manager_dump_jobs(m, stdout, "\t");
1628 retval = EXIT_SUCCESS;
1634 r = manager_loop(m);
1636 log_error("Failed to run mainloop: %s", strerror(-r));
1640 switch (m->exit_code) {
1643 retval = EXIT_SUCCESS;
1647 case MANAGER_RELOAD:
1648 log_info("Reloading.");
1649 r = manager_reload(m);
1651 log_error("Failed to reload: %s", strerror(-r));
1654 case MANAGER_REEXECUTE:
1656 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1660 log_notice("Reexecuting.");
1663 case MANAGER_SWITCH_ROOT:
1664 /* Steal the switch root parameters */
1665 switch_root_dir = m->switch_root;
1666 switch_root_init = m->switch_root_init;
1667 m->switch_root = m->switch_root_init = NULL;
1669 if (!switch_root_init)
1670 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1674 log_notice("Switching root.");
1677 case MANAGER_REBOOT:
1678 case MANAGER_POWEROFF:
1680 case MANAGER_KEXEC: {
1681 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1682 [MANAGER_REBOOT] = "reboot",
1683 [MANAGER_POWEROFF] = "poweroff",
1684 [MANAGER_HALT] = "halt",
1685 [MANAGER_KEXEC] = "kexec"
1688 assert_se(shutdown_verb = table[m->exit_code]);
1689 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1691 log_notice("Shutting down.");
1696 assert_not_reached("Unknown exit code.");
1704 for (j = 0; j < RLIMIT_NLIMITS; j++)
1705 free(arg_default_rlimit[j]);
1707 free(arg_default_unit);
1708 free_join_controllers();
1715 unsigned i, args_size;
1717 /* Close and disarm the watchdog, so that the new
1718 * instance can reinitialize it, but doesn't get
1719 * rebooted while we do that */
1720 watchdog_close(true);
1722 /* Reset the RLIMIT_NOFILE to the kernel default, so
1723 * that the new systemd can pass the kernel default to
1724 * its child processes */
1725 if (saved_rlimit_nofile.rlim_cur > 0)
1726 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1728 if (switch_root_dir) {
1729 /* Kill all remaining processes from the
1730 * initrd, but don't wait for them, so that we
1731 * can handle the SIGCHLD for them after
1733 broadcast_signal(SIGTERM, false);
1735 /* And switch root */
1736 r = switch_root(switch_root_dir);
1738 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1741 args_size = MAX(6, argc+1);
1742 args = newa(const char*, args_size);
1744 if (!switch_root_init) {
1747 /* First try to spawn ourselves with the right
1748 * path, and with full serialization. We do
1749 * this only if the user didn't specify an
1750 * explicit init to spawn. */
1752 assert(serialization);
1755 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1759 args[i++] = SYSTEMD_BINARY_PATH;
1760 if (switch_root_dir)
1761 args[i++] = "--switched-root";
1762 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1763 args[i++] = "--deserialize";
1767 /* do not pass along the environment we inherit from the kernel or initrd */
1768 if (switch_root_dir)
1771 assert(i <= args_size);
1772 execv(args[0], (char* const*) args);
1775 /* Try the fallback, if there is any, without any
1776 * serialization. We pass the original argv[] and
1777 * envp[]. (Well, modulo the ordering changes due to
1778 * getopt() in argv[], and some cleanups in envp[],
1779 * but let's hope that doesn't matter.) */
1781 if (serialization) {
1782 fclose(serialization);
1783 serialization = NULL;
1791 /* Reopen the console */
1792 make_console_stdio();
1794 for (j = 1, i = 1; j < argc; j++)
1795 args[i++] = argv[j];
1797 assert(i <= args_size);
1799 if (switch_root_init) {
1800 args[0] = switch_root_init;
1801 execv(args[0], (char* const*) args);
1802 log_warning("Failed to execute configured init, trying fallback: %m");
1805 args[0] = "/sbin/init";
1806 execv(args[0], (char* const*) args);
1808 if (errno == ENOENT) {
1809 log_warning("No /sbin/init, trying fallback");
1811 args[0] = "/bin/sh";
1813 execv(args[0], (char* const*) args);
1814 log_error("Failed to execute /bin/sh, giving up: %m");
1816 log_warning("Failed to execute /sbin/init, giving up: %m");
1820 fclose(serialization);
1825 if (shutdown_verb) {
1826 const char * command_line[] = {
1827 SYSTEMD_SHUTDOWN_BINARY_PATH,
1833 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1836 /* If we reboot let's set the shutdown
1837 * watchdog and tell the shutdown binary to
1838 * repeatedly ping it */
1839 watchdog_set_timeout(&arg_shutdown_watchdog);
1840 watchdog_close(false);
1842 /* Tell the binary how often to ping */
1843 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1846 env_block = strv_append(environ, e);
1848 env_block = strv_copy(environ);
1849 watchdog_close(true);
1852 /* Avoid the creation of new processes forked by the
1853 * kernel; at this point, we will not listen to the
1855 if (detect_container(NULL) <= 0)
1856 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1858 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1860 log_error("Failed to execute shutdown binary, freezing: %m");