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 "bus-errors.h"
51 #include "path-util.h"
52 #include "switch-root.h"
53 #include "capability.h"
56 #include "mount-setup.h"
57 #include "loopback-setup.h"
59 #include "kmod-setup.h"
61 #include "hostname-setup.h"
62 #include "machine-id-setup.h"
63 #include "locale-setup.h"
65 #include "selinux-setup.h"
66 #include "ima-setup.h"
67 #include "sd-daemon.h"
74 ACTION_DUMP_CONFIGURATION_ITEMS,
76 } arg_action = ACTION_RUN;
78 static char *arg_default_unit = NULL;
79 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
81 static bool arg_dump_core = true;
82 static bool arg_crash_shell = false;
83 static int arg_crash_chvt = -1;
84 static bool arg_confirm_spawn = false;
85 static bool arg_show_status = true;
86 static bool arg_switched_root = false;
87 static char **arg_default_controllers = NULL;
88 static char ***arg_join_controllers = NULL;
89 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
90 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
91 static usec_t arg_runtime_watchdog = 0;
92 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
93 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
94 static uint64_t arg_capability_bounding_set_drop = 0;
95 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
97 static FILE* serialization = NULL;
99 static void nop_handler(int sig) {
102 _noreturn_ static void crash(int sig) {
105 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
110 /* We want to wait for the core process, hence let's enable SIGCHLD */
112 sa.sa_handler = nop_handler;
113 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
114 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
116 if ((pid = fork()) < 0)
117 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
122 /* Enable default signal handler for core dump */
124 sa.sa_handler = SIG_DFL;
125 assert_se(sigaction(sig, &sa, NULL) == 0);
127 /* Don't limit the core dump size */
129 rl.rlim_cur = RLIM_INFINITY;
130 rl.rlim_max = RLIM_INFINITY;
131 setrlimit(RLIMIT_CORE, &rl);
133 /* Just to be sure... */
134 assert_se(chdir("/") == 0);
136 /* Raise the signal again */
139 assert_not_reached("We shouldn't be here...");
146 /* Order things nicely. */
147 if ((r = wait_for_terminate(pid, &status)) < 0)
148 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
149 else if (status.si_code != CLD_DUMPED)
150 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
152 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
157 chvt(arg_crash_chvt);
159 if (arg_crash_shell) {
163 log_info("Executing crash shell in 10s...");
166 /* Let the kernel reap children for us */
168 sa.sa_handler = SIG_IGN;
169 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
170 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
174 log_error("Failed to fork off crash shell: %m");
176 make_console_stdio();
177 execl("/bin/sh", "/bin/sh", NULL);
179 log_error("execl() failed: %m");
183 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
186 log_info("Freezing execution.");
190 static void install_crash_handler(void) {
195 sa.sa_handler = crash;
196 sa.sa_flags = SA_NODEFER;
198 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
201 static int console_setup(bool do_reset) {
204 /* If we are init, we connect stdin/stdout/stderr to /dev/null
205 * and make sure we don't have a controlling tty. */
212 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
214 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
218 /* We don't want to force text mode.
219 * plymouth may be showing pictures already from initrd. */
220 r = reset_terminal_fd(tty_fd, false);
222 log_error("Failed to reset /dev/console: %s", strerror(-r));
224 close_nointr_nofail(tty_fd);
228 static int set_default_unit(const char *u) {
237 free(arg_default_unit);
238 arg_default_unit = c;
243 static int parse_proc_cmdline_word(const char *word) {
245 static const char * const rlmap[] = {
246 "emergency", SPECIAL_EMERGENCY_TARGET,
247 "-b", SPECIAL_EMERGENCY_TARGET,
248 "single", SPECIAL_RESCUE_TARGET,
249 "-s", SPECIAL_RESCUE_TARGET,
250 "s", SPECIAL_RESCUE_TARGET,
251 "S", SPECIAL_RESCUE_TARGET,
252 "1", SPECIAL_RESCUE_TARGET,
253 "2", SPECIAL_RUNLEVEL2_TARGET,
254 "3", SPECIAL_RUNLEVEL3_TARGET,
255 "4", SPECIAL_RUNLEVEL4_TARGET,
256 "5", SPECIAL_RUNLEVEL5_TARGET,
261 if (startswith(word, "systemd.unit=")) {
264 return set_default_unit(word + 13);
266 } else if (startswith(word, "rd.systemd.unit=")) {
269 return set_default_unit(word + 16);
271 } else if (startswith(word, "systemd.log_target=")) {
273 if (log_set_target_from_string(word + 19) < 0)
274 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
276 } else if (startswith(word, "systemd.log_level=")) {
278 if (log_set_max_level_from_string(word + 18) < 0)
279 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
281 } else if (startswith(word, "systemd.log_color=")) {
283 if (log_show_color_from_string(word + 18) < 0)
284 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
286 } else if (startswith(word, "systemd.log_location=")) {
288 if (log_show_location_from_string(word + 21) < 0)
289 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
291 } else if (startswith(word, "systemd.dump_core=")) {
294 if ((r = parse_boolean(word + 18)) < 0)
295 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
299 } else if (startswith(word, "systemd.crash_shell=")) {
302 if ((r = parse_boolean(word + 20)) < 0)
303 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
307 } else if (startswith(word, "systemd.confirm_spawn=")) {
310 if ((r = parse_boolean(word + 22)) < 0)
311 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
313 arg_confirm_spawn = r;
315 } else if (startswith(word, "systemd.crash_chvt=")) {
318 if (safe_atoi(word + 19, &k) < 0)
319 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
323 } else if (startswith(word, "systemd.show_status=")) {
326 if ((r = parse_boolean(word + 20)) < 0)
327 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
330 } else if (startswith(word, "systemd.default_standard_output=")) {
333 if ((r = exec_output_from_string(word + 32)) < 0)
334 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
336 arg_default_std_output = r;
337 } else if (startswith(word, "systemd.default_standard_error=")) {
340 if ((r = exec_output_from_string(word + 31)) < 0)
341 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
343 arg_default_std_error = r;
344 } else if (startswith(word, "systemd.setenv=")) {
348 cenv = strdup(word + 15);
352 eq = strchr(cenv, '=');
356 log_warning("unsetenv failed %m. Ignoring.");
359 r = setenv(cenv, eq + 1, 1);
361 log_warning("setenv failed %m. Ignoring.");
365 } else if (startswith(word, "systemd.") ||
366 (in_initrd() && startswith(word, "rd.systemd."))) {
368 log_warning("Unknown kernel switch %s. Ignoring.", word);
370 log_info("Supported kernel switches:\n"
371 "systemd.unit=UNIT Default unit to start\n"
372 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
373 "systemd.dump_core=0|1 Dump core on crash\n"
374 "systemd.crash_shell=0|1 Run shell on crash\n"
375 "systemd.crash_chvt=N Change to VT #N on crash\n"
376 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
377 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
378 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
380 "systemd.log_level=LEVEL Log level\n"
381 "systemd.log_color=0|1 Highlight important log messages\n"
382 "systemd.log_location=0|1 Include code location in log messages\n"
383 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
384 " Set default log output for services\n"
385 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
386 " Set default log error output for services\n"
387 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
389 } else if (streq(word, "quiet"))
390 arg_show_status = false;
391 else if (!in_initrd()) {
394 /* SysV compatibility */
395 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
396 if (streq(word, rlmap[i]))
397 return set_default_unit(rlmap[i+1]);
403 static int config_parse_level2(
404 const char *filename,
417 log_set_max_level_from_string(rvalue);
421 static int config_parse_target(
422 const char *filename,
435 log_set_target_from_string(rvalue);
439 static int config_parse_color(
440 const char *filename,
453 log_show_color_from_string(rvalue);
457 static int config_parse_location(
458 const char *filename,
471 log_show_location_from_string(rvalue);
475 static int config_parse_cpu_affinity2(
476 const char *filename,
495 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
500 if (!(t = strndup(w, l)))
503 r = safe_atou(t, &cpu);
507 if (!(c = cpu_set_malloc(&ncpus)))
510 if (r < 0 || cpu >= ncpus) {
511 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
516 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
520 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
521 log_warning("Failed to set CPU affinity: %m");
529 static void strv_free_free(char ***l) {
541 static void free_join_controllers(void) {
542 if (!arg_join_controllers)
545 strv_free_free(arg_join_controllers);
546 arg_join_controllers = NULL;
549 static int config_parse_join_controllers(
550 const char *filename,
567 free_join_controllers();
569 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
572 s = strndup(w, length);
576 l = strv_split(s, ",");
581 if (strv_length(l) <= 1) {
586 if (!arg_join_controllers) {
587 arg_join_controllers = new(char**, 2);
588 if (!arg_join_controllers) {
593 arg_join_controllers[0] = l;
594 arg_join_controllers[1] = NULL;
601 t = new0(char**, n+2);
609 for (a = arg_join_controllers; *a; a++) {
611 if (strv_overlap(*a, l)) {
614 c = strv_merge(*a, l);
637 t[n++] = strv_uniq(l);
639 strv_free_free(arg_join_controllers);
640 arg_join_controllers = t;
647 static int parse_config_file(void) {
649 const ConfigTableItem items[] = {
650 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
651 { "Manager", "LogTarget", config_parse_target, 0, NULL },
652 { "Manager", "LogColor", config_parse_color, 0, NULL },
653 { "Manager", "LogLocation", config_parse_location, 0, NULL },
654 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
655 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
656 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
657 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
658 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
659 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
660 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
661 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
662 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
663 { "Manager", "RuntimeWatchdogSec", config_parse_usec, 0, &arg_runtime_watchdog },
664 { "Manager", "ShutdownWatchdogSec", config_parse_usec, 0, &arg_shutdown_watchdog },
665 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
666 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
667 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
668 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
669 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
670 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
671 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
672 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
673 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
674 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
675 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
676 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
677 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
678 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
679 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
680 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
681 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
682 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
683 { NULL, NULL, NULL, 0, NULL }
690 fn = arg_running_as == SYSTEMD_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
696 log_warning("Failed to open configuration file '%s': %m", fn);
700 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
702 log_warning("Failed to parse configuration file: %s", strerror(-r));
709 static int parse_proc_cmdline(void) {
710 char *line, *w, *state;
714 /* Don't read /proc/cmdline if we are in a container, since
715 * that is only relevant for the host system */
716 if (detect_container(NULL) > 0)
719 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
720 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
724 FOREACH_WORD_QUOTED(w, l, line, state) {
727 if (!(word = strndup(w, l))) {
732 r = parse_proc_cmdline_word(word);
734 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
749 static int parse_argv(int argc, char *argv[]) {
752 ARG_LOG_LEVEL = 0x100,
761 ARG_DUMP_CONFIGURATION_ITEMS,
769 ARG_DEFAULT_STD_OUTPUT,
770 ARG_DEFAULT_STD_ERROR
773 static const struct option options[] = {
774 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
775 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
776 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
777 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
778 { "unit", required_argument, NULL, ARG_UNIT },
779 { "system", no_argument, NULL, ARG_SYSTEM },
780 { "user", no_argument, NULL, ARG_USER },
781 { "test", no_argument, NULL, ARG_TEST },
782 { "help", no_argument, NULL, 'h' },
783 { "version", no_argument, NULL, ARG_VERSION },
784 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
785 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
786 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
787 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
788 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
789 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
790 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
791 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
792 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
793 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
805 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
810 if ((r = log_set_max_level_from_string(optarg)) < 0) {
811 log_error("Failed to parse log level %s.", optarg);
819 if ((r = log_set_target_from_string(optarg)) < 0) {
820 log_error("Failed to parse log target %s.", optarg);
829 if ((r = log_show_color_from_string(optarg)) < 0) {
830 log_error("Failed to parse log color setting %s.", optarg);
834 log_show_color(true);
838 case ARG_LOG_LOCATION:
841 if ((r = log_show_location_from_string(optarg)) < 0) {
842 log_error("Failed to parse log location setting %s.", optarg);
846 log_show_location(true);
850 case ARG_DEFAULT_STD_OUTPUT:
852 if ((r = exec_output_from_string(optarg)) < 0) {
853 log_error("Failed to parse default standard output setting %s.", optarg);
856 arg_default_std_output = r;
859 case ARG_DEFAULT_STD_ERROR:
861 if ((r = exec_output_from_string(optarg)) < 0) {
862 log_error("Failed to parse default standard error output setting %s.", optarg);
865 arg_default_std_error = r;
870 if ((r = set_default_unit(optarg)) < 0) {
871 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
878 arg_running_as = SYSTEMD_SYSTEM;
882 arg_running_as = SYSTEMD_USER;
886 arg_action = ACTION_TEST;
890 arg_action = ACTION_VERSION;
893 case ARG_DUMP_CONFIGURATION_ITEMS:
894 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
898 r = optarg ? parse_boolean(optarg) : 1;
900 log_error("Failed to parse dump core boolean %s.", optarg);
906 case ARG_CRASH_SHELL:
907 r = optarg ? parse_boolean(optarg) : 1;
909 log_error("Failed to parse crash shell boolean %s.", optarg);
915 case ARG_CONFIRM_SPAWN:
916 r = optarg ? parse_boolean(optarg) : 1;
918 log_error("Failed to parse confirm spawn boolean %s.", optarg);
921 arg_confirm_spawn = r;
924 case ARG_SHOW_STATUS:
925 r = optarg ? parse_boolean(optarg) : 1;
927 log_error("Failed to parse show status boolean %s.", optarg);
933 case ARG_DESERIALIZE: {
937 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
938 log_error("Failed to parse deserialize option %s.", optarg);
942 if (!(f = fdopen(fd, "r"))) {
943 log_error("Failed to open serialization fd: %m");
948 fclose(serialization);
955 case ARG_SWITCHED_ROOT:
956 arg_switched_root = true;
959 case ARG_INTROSPECT: {
960 const char * const * i = NULL;
962 for (i = bus_interface_table; *i; i += 2)
963 if (!optarg || streq(i[0], optarg)) {
964 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
967 fputs("</node>\n", stdout);
974 log_error("Unknown interface %s.", optarg);
976 arg_action = ACTION_DONE;
981 arg_action = ACTION_HELP;
985 log_set_max_level(LOG_DEBUG);
991 /* Just to eat away the sysvinit kernel
992 * cmdline args without getopt() error
993 * messages that we'll parse in
994 * parse_proc_cmdline_word() or ignore. */
999 log_error("Unknown option code %c", c);
1006 if (optind < argc && getpid() != 1) {
1007 /* Hmm, when we aren't run as init system
1008 * let's complain about excess arguments */
1010 log_error("Excess arguments.");
1014 if (detect_container(NULL) > 0) {
1017 /* All /proc/cmdline arguments the kernel didn't
1018 * understand it passed to us. We're not really
1019 * interested in that usually since /proc/cmdline is
1020 * more interesting and complete. With one exception:
1021 * if we are run in a container /proc/cmdline is not
1022 * relevant for the container, hence we rely on argv[]
1025 for (a = argv; a < argv + argc; a++)
1026 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1027 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1035 static int help(void) {
1037 printf("%s [OPTIONS...]\n\n"
1038 "Starts up and maintains the system or user services.\n\n"
1039 " -h --help Show this help\n"
1040 " --test Determine startup sequence, dump it and exit\n"
1041 " --dump-configuration-items Dump understood unit configuration items\n"
1042 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1043 " --unit=UNIT Set default unit\n"
1044 " --system Run a system instance, even if PID != 1\n"
1045 " --user Run a user instance\n"
1046 " --dump-core[=0|1] Dump core on crash\n"
1047 " --crash-shell[=0|1] Run shell on crash\n"
1048 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1049 " --show-status[=0|1] Show status updates on the console during bootup\n"
1050 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1051 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1052 " --log-color[=0|1] Highlight important log messages\n"
1053 " --log-location[=0|1] Include code location in log messages\n"
1054 " --default-standard-output= Set default standard output for services\n"
1055 " --default-standard-error= Set default standard error output for services\n",
1056 program_invocation_short_name);
1061 static int version(void) {
1062 puts(PACKAGE_STRING);
1064 puts(SYSTEMD_FEATURES);
1069 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool serialize_jobs) {
1078 /* Make sure nothing is really destructed when we shut down */
1081 r = manager_open_serialization(m, &f);
1083 log_error("Failed to create serialization file: %s", strerror(-r));
1090 log_error("Failed to allocate fd set: %s", strerror(-r));
1094 r = manager_serialize(m, f, fds, serialize_jobs);
1096 log_error("Failed to serialize state: %s", strerror(-r));
1100 if (fseeko(f, 0, SEEK_SET) < 0) {
1101 log_error("Failed to rewind serialization fd: %m");
1105 r = fd_cloexec(fileno(f), false);
1107 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1111 r = fdset_cloexec(fds, false);
1113 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1131 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1135 assert(saved_rlimit);
1137 /* Save the original RLIMIT_NOFILE so that we can reset it
1138 * later when transitioning from the initrd to the main
1139 * systemd or suchlike. */
1140 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1141 log_error("Reading RLIMIT_NOFILE failed: %m");
1145 /* Make sure forked processes get the default kernel setting */
1146 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1149 rl = newdup(struct rlimit, saved_rlimit, 1);
1153 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1156 /* Bump up the resource limit for ourselves substantially */
1157 nl.rlim_cur = nl.rlim_max = 64*1024;
1158 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1160 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1167 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1169 unsigned long long a, b;
1173 e = getenv("RD_TIMESTAMP");
1177 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1180 t->realtime = (usec_t) a;
1181 t->monotonic = (usec_t) b;
1186 static void test_mtab(void) {
1189 /* Check that /etc/mtab is a symlink */
1191 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1194 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1201 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1202 "This is not supported anymore. "
1203 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1206 static void test_usr(void) {
1208 /* Check that /usr is not a separate fs */
1210 if (dir_is_empty("/usr") <= 0)
1213 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1214 "Some things will probably break (sometimes even silently) in mysterious ways. "
1215 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1218 static void test_cgroups(void) {
1220 if (access("/proc/cgroups", F_OK) >= 0)
1223 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1224 "Systems without control groups are not supported. "
1225 "We will now sleep for 10s, and then continue boot-up. "
1226 "Expect breakage and please do not file bugs. "
1227 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1228 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1233 static int initialize_join_controllers(void) {
1234 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1235 * + "net_prio". We'd like to add "cpuset" to the mix, but
1236 * "cpuset" does't really work for groups with no initialized
1239 arg_join_controllers = new(char**, 3);
1240 if (!arg_join_controllers)
1243 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1244 if (!arg_join_controllers[0])
1247 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1248 if (!arg_join_controllers[1])
1251 arg_join_controllers[2] = NULL;
1255 int main(int argc, char *argv[]) {
1257 int r, retval = EXIT_FAILURE;
1258 usec_t before_startup, after_startup;
1259 char timespan[FORMAT_TIMESPAN_MAX];
1261 bool reexecute = false;
1262 const char *shutdown_verb = NULL;
1263 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1264 static char systemd[] = "systemd";
1265 bool skip_setup = false;
1267 bool loaded_policy = false;
1268 bool arm_reboot_watchdog = false;
1269 bool queue_default_job = false;
1270 char *switch_root_dir = NULL, *switch_root_init = NULL;
1271 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1273 #ifdef HAVE_SYSV_COMPAT
1274 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1275 /* This is compatibility support for SysV, where
1276 * calling init as a user is identical to telinit. */
1279 execv(SYSTEMCTL_BINARY_PATH, argv);
1280 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1285 /* Determine if this is a reexecution or normal bootup. We do
1286 * the full command line parsing much later, so let's just
1287 * have a quick peek here. */
1288 for (j = 1; j < argc; j++)
1289 if (streq(argv[j], "--deserialize")) {
1294 /* If we have switched root, do all the special setup
1296 for (j = 1; j < argc; j++)
1297 if (streq(argv[j], "--switched-root")) {
1302 /* If we get started via the /sbin/init symlink then we are
1303 called 'init'. After a subsequent reexecution we are then
1304 called 'systemd'. That is confusing, hence let's call us
1305 systemd right-away. */
1306 program_invocation_short_name = systemd;
1307 prctl(PR_SET_NAME, systemd);
1312 log_show_color(isatty(STDERR_FILENO) > 0);
1314 if (getpid() == 1 && detect_container(NULL) <= 0) {
1316 /* Running outside of a container as PID 1 */
1317 arg_running_as = SYSTEMD_SYSTEM;
1319 log_set_target(LOG_TARGET_KMSG);
1323 char *rd_timestamp = NULL;
1325 dual_timestamp_get(&initrd_timestamp);
1326 asprintf(&rd_timestamp, "%llu %llu",
1327 (unsigned long long) initrd_timestamp.realtime,
1328 (unsigned long long) initrd_timestamp.monotonic);
1330 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1336 if (selinux_setup(&loaded_policy) < 0)
1338 if (ima_setup() < 0)
1342 if (label_init(NULL) < 0)
1346 if (hwclock_is_localtime() > 0) {
1349 /* The first-time call to settimeofday() does a time warp in the kernel */
1350 r = hwclock_set_timezone(&min);
1352 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1354 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1355 } else if (!in_initrd()) {
1357 * Do dummy first-time call to seal the kernel's time warp magic
1359 * Do not call this this from inside the initrd. The initrd might not
1360 * carry /etc/adjtime with LOCAL, but the real system could be set up
1361 * that way. In such case, we need to delay the time-warp or the sealing
1362 * until we reach the real system.
1364 hwclock_reset_timezone();
1366 /* Tell the kernel our time zone */
1367 r = hwclock_set_timezone(NULL);
1369 log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
1373 /* Set the default for later on, but don't actually
1374 * open the logs like this for now. Note that if we
1375 * are transitioning from the initrd there might still
1376 * be journal fd open, and we shouldn't attempt
1377 * opening that before we parsed /proc/cmdline which
1378 * might redirect output elsewhere. */
1379 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1381 } else if (getpid() == 1) {
1383 /* Running inside a container, as PID 1 */
1384 arg_running_as = SYSTEMD_SYSTEM;
1385 log_set_target(LOG_TARGET_CONSOLE);
1388 /* For the later on, see above... */
1389 log_set_target(LOG_TARGET_JOURNAL);
1393 /* Running as user instance */
1394 arg_running_as = SYSTEMD_USER;
1395 log_set_target(LOG_TARGET_AUTO);
1399 /* Initialize default unit */
1400 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1402 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1406 r = initialize_join_controllers();
1410 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1411 * /proc/$PID/fd is available. */
1412 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1413 r = mount_setup(loaded_policy);
1418 /* Reset all signal handlers. */
1419 assert_se(reset_all_signal_handlers() == 0);
1421 /* If we are init, we can block sigkill. Yay. */
1422 ignore_signals(SIGNALS_IGNORE, -1);
1424 if (parse_config_file() < 0)
1427 if (arg_running_as == SYSTEMD_SYSTEM)
1428 if (parse_proc_cmdline() < 0)
1431 log_parse_environment();
1433 if (parse_argv(argc, argv) < 0)
1436 if (arg_action == ACTION_TEST &&
1438 log_error("Don't run test mode as root.");
1442 if (arg_running_as == SYSTEMD_USER &&
1443 arg_action == ACTION_RUN &&
1445 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1449 if (arg_running_as == SYSTEMD_SYSTEM &&
1450 arg_action == ACTION_RUN &&
1451 running_in_chroot() > 0) {
1452 log_error("Cannot be run in a chroot() environment.");
1456 if (arg_action == ACTION_HELP) {
1459 } else if (arg_action == ACTION_VERSION) {
1462 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1463 unit_dump_config_items(stdout);
1464 retval = EXIT_SUCCESS;
1466 } else if (arg_action == ACTION_DONE) {
1467 retval = EXIT_SUCCESS;
1471 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1473 /* Close logging fds, in order not to confuse fdset below */
1476 /* Remember open file descriptors for later deserialization */
1477 if (serialization) {
1478 r = fdset_new_fill(&fds);
1480 log_error("Failed to allocate fd set: %s", strerror(-r));
1484 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1486 close_all_fds(NULL, 0);
1488 /* Set up PATH unless it is already set */
1490 #ifdef HAVE_SPLIT_USR
1491 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1493 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1495 arg_running_as == SYSTEMD_SYSTEM);
1497 if (arg_running_as == SYSTEMD_SYSTEM) {
1498 /* Parse the data passed to us. We leave this
1499 * variables set, but the manager later on will not
1500 * pass them on to our children. */
1502 parse_initrd_timestamp(&initrd_timestamp);
1504 /* Unset some environment variables passed in from the
1505 * kernel that don't really make sense for us. */
1509 /* When we are invoked by a shell, these might be set,
1510 * but make little sense to pass on */
1515 /* When we are invoked by a chroot-like tool such as
1516 * nspawn, these might be set, but make little sense
1519 unsetenv("LOGNAME");
1521 /* All other variables are left as is, so that clients
1522 * can still read them via /proc/1/environ */
1525 /* Move out of the way, so that we won't block unmounts */
1526 assert_se(chdir("/") == 0);
1528 if (arg_running_as == SYSTEMD_SYSTEM) {
1529 /* Become a session leader if we aren't one yet. */
1532 /* Disable the umask logic */
1536 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1537 dbus_connection_set_change_sigpipe(FALSE);
1539 /* Reset the console, but only if this is really init and we
1540 * are freshly booted */
1541 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1542 console_setup(getpid() == 1 && !skip_setup);
1544 /* Open the logging devices, if possible and necessary */
1547 /* Make sure we leave a core dump without panicing the
1550 install_crash_handler();
1552 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1553 r = mount_cgroup_controllers(arg_join_controllers);
1558 if (arg_running_as == SYSTEMD_SYSTEM) {
1559 const char *virtualization = NULL;
1561 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")");
1563 detect_virtualization(&virtualization);
1565 log_info("Detected virtualization '%s'.", virtualization);
1568 log_info("Running in initial RAM disk.");
1571 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")");
1573 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1576 if (arg_show_status || plymouth_running())
1591 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1592 watchdog_set_timeout(&arg_runtime_watchdog);
1594 if (arg_timer_slack_nsec != (nsec_t) -1)
1595 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1596 log_error("Failed to adjust timer slack: %m");
1598 if (arg_capability_bounding_set_drop) {
1599 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1601 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1604 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1606 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1611 if (arg_running_as == SYSTEMD_USER) {
1612 /* Become reaper of our children */
1613 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1614 log_warning("Failed to make us a subreaper: %m");
1615 if (errno == EINVAL)
1616 log_info("Perhaps the kernel version is too old (< 3.4?)");
1620 if (arg_running_as == SYSTEMD_SYSTEM)
1621 bump_rlimit_nofile(&saved_rlimit_nofile);
1623 r = manager_new(arg_running_as, &m);
1625 log_error("Failed to allocate manager object: %s", strerror(-r));
1629 m->confirm_spawn = arg_confirm_spawn;
1630 m->default_std_output = arg_default_std_output;
1631 m->default_std_error = arg_default_std_error;
1632 m->runtime_watchdog = arg_runtime_watchdog;
1633 m->shutdown_watchdog = arg_shutdown_watchdog;
1635 manager_set_default_rlimits(m, arg_default_rlimit);
1637 if (dual_timestamp_is_set(&initrd_timestamp))
1638 m->initrd_timestamp = initrd_timestamp;
1640 if (arg_default_controllers)
1641 manager_set_default_controllers(m, arg_default_controllers);
1643 manager_set_show_status(m, arg_show_status);
1645 /* Remember whether we should queue the default job */
1646 queue_default_job = !serialization || arg_switched_root;
1648 before_startup = now(CLOCK_MONOTONIC);
1650 r = manager_startup(m, serialization, fds);
1652 log_error("Failed to fully start up daemon: %s", strerror(-r));
1654 /* This will close all file descriptors that were opened, but
1655 * not claimed by any unit. */
1661 if (serialization) {
1662 fclose(serialization);
1663 serialization = NULL;
1666 if (queue_default_job) {
1668 Unit *target = NULL;
1669 Job *default_unit_job;
1671 dbus_error_init(&error);
1673 log_debug("Activating default unit: %s", arg_default_unit);
1675 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1677 log_error("Failed to load default target: %s", bus_error(&error, r));
1678 dbus_error_free(&error);
1679 } else if (target->load_state == UNIT_ERROR)
1680 log_error("Failed to load default target: %s", strerror(-target->load_error));
1681 else if (target->load_state == UNIT_MASKED)
1682 log_error("Default target masked.");
1684 if (!target || target->load_state != UNIT_LOADED) {
1685 log_info("Trying to load rescue target...");
1687 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1689 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1690 dbus_error_free(&error);
1692 } else if (target->load_state == UNIT_ERROR) {
1693 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1695 } else if (target->load_state == UNIT_MASKED) {
1696 log_error("Rescue target masked.");
1701 assert(target->load_state == UNIT_LOADED);
1703 if (arg_action == ACTION_TEST) {
1704 printf("-> By units:\n");
1705 manager_dump_units(m, stdout, "\t");
1708 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1710 log_error("Failed to start default target: %s", bus_error(&error, r));
1711 dbus_error_free(&error);
1714 m->default_unit_job_id = default_unit_job->id;
1716 after_startup = now(CLOCK_MONOTONIC);
1717 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1718 "Loaded units and determined initial transaction in %s.",
1719 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1721 if (arg_action == ACTION_TEST) {
1722 printf("-> By jobs:\n");
1723 manager_dump_jobs(m, stdout, "\t");
1724 retval = EXIT_SUCCESS;
1730 r = manager_loop(m);
1732 log_error("Failed to run mainloop: %s", strerror(-r));
1736 switch (m->exit_code) {
1739 retval = EXIT_SUCCESS;
1743 case MANAGER_RELOAD:
1744 log_info("Reloading.");
1745 r = manager_reload(m);
1747 log_error("Failed to reload: %s", strerror(-r));
1750 case MANAGER_REEXECUTE:
1752 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1756 log_notice("Reexecuting.");
1759 case MANAGER_SWITCH_ROOT:
1760 /* Steal the switch root parameters */
1761 switch_root_dir = m->switch_root;
1762 switch_root_init = m->switch_root_init;
1763 m->switch_root = m->switch_root_init = NULL;
1765 if (!switch_root_init)
1766 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1770 log_notice("Switching root.");
1773 case MANAGER_REBOOT:
1774 case MANAGER_POWEROFF:
1776 case MANAGER_KEXEC: {
1777 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1778 [MANAGER_REBOOT] = "reboot",
1779 [MANAGER_POWEROFF] = "poweroff",
1780 [MANAGER_HALT] = "halt",
1781 [MANAGER_KEXEC] = "kexec"
1784 assert_se(shutdown_verb = table[m->exit_code]);
1785 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1787 log_notice("Shutting down.");
1792 assert_not_reached("Unknown exit code.");
1800 for (j = 0; j < RLIMIT_NLIMITS; j++)
1801 free(arg_default_rlimit[j]);
1803 free(arg_default_unit);
1804 strv_free(arg_default_controllers);
1805 free_join_controllers();
1812 unsigned i, args_size;
1814 /* Close and disarm the watchdog, so that the new
1815 * instance can reinitialize it, but doesn't get
1816 * rebooted while we do that */
1817 watchdog_close(true);
1819 /* Reset the RLIMIT_NOFILE to the kernel default, so
1820 * that the new systemd can pass the kernel default to
1821 * its child processes */
1822 if (saved_rlimit_nofile.rlim_cur > 0)
1823 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1825 if (switch_root_dir) {
1826 /* Kill all remaining processes from the
1827 * initrd, but don't wait for them, so that we
1828 * can handle the SIGCHLD for them after
1830 broadcast_signal(SIGTERM, false);
1832 /* And switch root */
1833 r = switch_root(switch_root_dir);
1835 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1838 args_size = MAX(6, argc+1);
1839 args = newa(const char*, args_size);
1841 if (!switch_root_init) {
1844 /* First try to spawn ourselves with the right
1845 * path, and with full serialization. We do
1846 * this only if the user didn't specify an
1847 * explicit init to spawn. */
1849 assert(serialization);
1852 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1856 args[i++] = SYSTEMD_BINARY_PATH;
1857 if (switch_root_dir)
1858 args[i++] = "--switched-root";
1859 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1860 args[i++] = "--deserialize";
1864 assert(i <= args_size);
1865 execv(args[0], (char* const*) args);
1868 /* Try the fallback, if there is any, without any
1869 * serialization. We pass the original argv[] and
1870 * envp[]. (Well, modulo the ordering changes due to
1871 * getopt() in argv[], and some cleanups in envp[],
1872 * but let's hope that doesn't matter.) */
1874 if (serialization) {
1875 fclose(serialization);
1876 serialization = NULL;
1884 /* Reopen the console */
1885 make_console_stdio();
1887 for (j = 1, i = 1; j < argc; j++)
1888 args[i++] = argv[j];
1890 assert(i <= args_size);
1892 if (switch_root_init) {
1893 args[0] = switch_root_init;
1894 execv(args[0], (char* const*) args);
1895 log_warning("Failed to execute configured init, trying fallback: %m");
1898 args[0] = "/sbin/init";
1899 execv(args[0], (char* const*) args);
1901 if (errno == ENOENT) {
1902 log_warning("No /sbin/init, trying fallback");
1904 args[0] = "/bin/sh";
1906 execv(args[0], (char* const*) args);
1907 log_error("Failed to execute /bin/sh, giving up: %m");
1909 log_warning("Failed to execute /sbin/init, giving up: %m");
1913 fclose(serialization);
1918 if (shutdown_verb) {
1919 const char * command_line[] = {
1920 SYSTEMD_SHUTDOWN_BINARY_PATH,
1926 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1929 /* If we reboot let's set the shutdown
1930 * watchdog and tell the shutdown binary to
1931 * repeatedly ping it */
1932 watchdog_set_timeout(&arg_shutdown_watchdog);
1933 watchdog_close(false);
1935 /* Tell the binary how often to ping */
1936 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1939 env_block = strv_append(environ, e);
1941 env_block = strv_copy(environ);
1942 watchdog_close(true);
1945 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1947 log_error("Failed to execute shutdown binary, freezing: %m");