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 /* Don't read /proc/cmdline if we are in a container, since
698 * that is only relevant for the host system */
699 if (detect_container(NULL) > 0)
702 r = read_one_line_file("/proc/cmdline", &line);
704 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
708 FOREACH_WORD_QUOTED(w, l, line, state) {
709 _cleanup_free_ char *word;
711 word = strndup(w, l);
715 r = parse_proc_cmdline_word(word);
717 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
725 static int parse_argv(int argc, char *argv[]) {
728 ARG_LOG_LEVEL = 0x100,
737 ARG_DUMP_CONFIGURATION_ITEMS,
744 ARG_DEFAULT_STD_OUTPUT,
745 ARG_DEFAULT_STD_ERROR
748 static const struct option options[] = {
749 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
750 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
751 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
752 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
753 { "unit", required_argument, NULL, ARG_UNIT },
754 { "system", no_argument, NULL, ARG_SYSTEM },
755 { "user", no_argument, NULL, ARG_USER },
756 { "test", no_argument, NULL, ARG_TEST },
757 { "help", no_argument, NULL, 'h' },
758 { "version", no_argument, NULL, ARG_VERSION },
759 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
760 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
761 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
762 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
763 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
764 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
765 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
766 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
767 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
779 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
784 if ((r = log_set_max_level_from_string(optarg)) < 0) {
785 log_error("Failed to parse log level %s.", optarg);
793 if ((r = log_set_target_from_string(optarg)) < 0) {
794 log_error("Failed to parse log target %s.", optarg);
803 if ((r = log_show_color_from_string(optarg)) < 0) {
804 log_error("Failed to parse log color setting %s.", optarg);
808 log_show_color(true);
812 case ARG_LOG_LOCATION:
815 if ((r = log_show_location_from_string(optarg)) < 0) {
816 log_error("Failed to parse log location setting %s.", optarg);
820 log_show_location(true);
824 case ARG_DEFAULT_STD_OUTPUT:
826 if ((r = exec_output_from_string(optarg)) < 0) {
827 log_error("Failed to parse default standard output setting %s.", optarg);
830 arg_default_std_output = r;
833 case ARG_DEFAULT_STD_ERROR:
835 if ((r = exec_output_from_string(optarg)) < 0) {
836 log_error("Failed to parse default standard error output setting %s.", optarg);
839 arg_default_std_error = r;
844 if ((r = set_default_unit(optarg)) < 0) {
845 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
852 arg_running_as = SYSTEMD_SYSTEM;
856 arg_running_as = SYSTEMD_USER;
860 arg_action = ACTION_TEST;
864 arg_action = ACTION_VERSION;
867 case ARG_DUMP_CONFIGURATION_ITEMS:
868 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
872 r = optarg ? parse_boolean(optarg) : 1;
874 log_error("Failed to parse dump core boolean %s.", optarg);
880 case ARG_CRASH_SHELL:
881 r = optarg ? parse_boolean(optarg) : 1;
883 log_error("Failed to parse crash shell boolean %s.", optarg);
889 case ARG_CONFIRM_SPAWN:
890 r = optarg ? parse_boolean(optarg) : 1;
892 log_error("Failed to parse confirm spawn boolean %s.", optarg);
895 arg_confirm_spawn = r;
898 case ARG_SHOW_STATUS:
899 r = optarg ? parse_boolean(optarg) : 1;
901 log_error("Failed to parse show status boolean %s.", optarg);
907 case ARG_DESERIALIZE: {
911 r = safe_atoi(optarg, &fd);
912 if (r < 0 || fd < 0) {
913 log_error("Failed to parse deserialize option %s.", optarg);
914 return r < 0 ? r : -EINVAL;
917 fd_cloexec(fd, true);
921 log_error("Failed to open serialization fd: %m");
926 fclose(serialization);
933 case ARG_SWITCHED_ROOT:
934 arg_switched_root = true;
938 arg_action = ACTION_HELP;
942 log_set_max_level(LOG_DEBUG);
948 /* Just to eat away the sysvinit kernel
949 * cmdline args without getopt() error
950 * messages that we'll parse in
951 * parse_proc_cmdline_word() or ignore. */
956 log_error("Unknown option code %c", c);
963 if (optind < argc && getpid() != 1) {
964 /* Hmm, when we aren't run as init system
965 * let's complain about excess arguments */
967 log_error("Excess arguments.");
971 if (detect_container(NULL) > 0) {
974 /* All /proc/cmdline arguments the kernel didn't
975 * understand it passed to us. We're not really
976 * interested in that usually since /proc/cmdline is
977 * more interesting and complete. With one exception:
978 * if we are run in a container /proc/cmdline is not
979 * relevant for the container, hence we rely on argv[]
982 for (a = argv; a < argv + argc; a++)
983 if ((r = parse_proc_cmdline_word(*a)) < 0) {
984 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
992 static int help(void) {
994 printf("%s [OPTIONS...]\n\n"
995 "Starts up and maintains the system or user services.\n\n"
996 " -h --help Show this help\n"
997 " --test Determine startup sequence, dump it and exit\n"
998 " --dump-configuration-items Dump understood unit configuration items\n"
999 " --unit=UNIT Set default unit\n"
1000 " --system Run a system instance, even if PID != 1\n"
1001 " --user Run a user instance\n"
1002 " --dump-core[=0|1] Dump core on crash\n"
1003 " --crash-shell[=0|1] Run shell on crash\n"
1004 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1005 " --show-status[=0|1] Show status updates on the console during bootup\n"
1006 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1007 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1008 " --log-color[=0|1] Highlight important log messages\n"
1009 " --log-location[=0|1] Include code location in log messages\n"
1010 " --default-standard-output= Set default standard output for services\n"
1011 " --default-standard-error= Set default standard error output for services\n",
1012 program_invocation_short_name);
1017 static int version(void) {
1018 puts(PACKAGE_STRING);
1019 puts(SYSTEMD_FEATURES);
1024 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1033 r = manager_open_serialization(m, &f);
1035 log_error("Failed to create serialization file: %s", strerror(-r));
1039 /* Make sure nothing is really destructed when we shut down */
1041 bus_broadcast_reloading(m, true);
1046 log_error("Failed to allocate fd set: %s", strerror(-r));
1050 r = manager_serialize(m, f, fds, switching_root);
1052 log_error("Failed to serialize state: %s", strerror(-r));
1056 if (fseeko(f, 0, SEEK_SET) < 0) {
1057 log_error("Failed to rewind serialization fd: %m");
1061 r = fd_cloexec(fileno(f), false);
1063 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1067 r = fdset_cloexec(fds, false);
1069 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1087 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1091 assert(saved_rlimit);
1093 /* Save the original RLIMIT_NOFILE so that we can reset it
1094 * later when transitioning from the initrd to the main
1095 * systemd or suchlike. */
1096 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1097 log_error("Reading RLIMIT_NOFILE failed: %m");
1101 /* Make sure forked processes get the default kernel setting */
1102 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1105 rl = newdup(struct rlimit, saved_rlimit, 1);
1109 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1112 /* Bump up the resource limit for ourselves substantially */
1113 nl.rlim_cur = nl.rlim_max = 64*1024;
1114 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1116 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1123 static void test_mtab(void) {
1126 /* Check that /etc/mtab is a symlink */
1128 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1131 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1138 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1139 "This is not supported anymore. "
1140 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1143 static void test_usr(void) {
1145 /* Check that /usr is not a separate fs */
1147 if (dir_is_empty("/usr") <= 0)
1150 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1151 "Some things will probably break (sometimes even silently) in mysterious ways. "
1152 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1155 static void test_cgroups(void) {
1157 if (access("/proc/cgroups", F_OK) >= 0)
1160 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1161 "Systems without control groups are not supported. "
1162 "We will now sleep for 10s, and then continue boot-up. "
1163 "Expect breakage and please do not file bugs. "
1164 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1165 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1170 static int initialize_join_controllers(void) {
1171 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1172 * + "net_prio". We'd like to add "cpuset" to the mix, but
1173 * "cpuset" does't really work for groups with no initialized
1176 arg_join_controllers = new(char**, 3);
1177 if (!arg_join_controllers)
1180 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1181 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1182 arg_join_controllers[2] = NULL;
1184 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1185 free_join_controllers();
1192 int main(int argc, char *argv[]) {
1194 int r, retval = EXIT_FAILURE;
1195 usec_t before_startup, after_startup;
1196 char timespan[FORMAT_TIMESPAN_MAX];
1198 bool reexecute = false;
1199 const char *shutdown_verb = NULL;
1200 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1201 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1202 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1203 static char systemd[] = "systemd";
1204 bool skip_setup = false;
1206 bool loaded_policy = false;
1207 bool arm_reboot_watchdog = false;
1208 bool queue_default_job = false;
1209 char *switch_root_dir = NULL, *switch_root_init = NULL;
1210 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1212 #ifdef HAVE_SYSV_COMPAT
1213 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1214 /* This is compatibility support for SysV, where
1215 * calling init as a user is identical to telinit. */
1218 execv(SYSTEMCTL_BINARY_PATH, argv);
1219 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1224 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1225 dual_timestamp_get(&userspace_timestamp);
1227 /* Determine if this is a reexecution or normal bootup. We do
1228 * the full command line parsing much later, so let's just
1229 * have a quick peek here. */
1230 if (strv_find(argv+1, "--deserialize"))
1233 /* If we have switched root, do all the special setup
1235 if (strv_find(argv+1, "--switched-root"))
1238 /* If we get started via the /sbin/init symlink then we are
1239 called 'init'. After a subsequent reexecution we are then
1240 called 'systemd'. That is confusing, hence let's call us
1241 systemd right-away. */
1242 program_invocation_short_name = systemd;
1243 prctl(PR_SET_NAME, systemd);
1248 log_show_color(isatty(STDERR_FILENO) > 0);
1250 /* Disable the umask logic */
1254 if (getpid() == 1 && detect_container(NULL) <= 0) {
1256 /* Running outside of a container as PID 1 */
1257 arg_running_as = SYSTEMD_SYSTEM;
1259 log_set_target(LOG_TARGET_KMSG);
1263 initrd_timestamp = userspace_timestamp;
1266 mount_setup_early();
1267 if (selinux_setup(&loaded_policy) < 0)
1269 if (ima_setup() < 0)
1271 if (smack_setup() < 0)
1275 if (label_init(NULL) < 0)
1279 if (hwclock_is_localtime() > 0) {
1282 /* The first-time call to settimeofday() does a time warp in the kernel */
1283 r = hwclock_set_timezone(&min);
1285 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1287 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1288 } else if (!in_initrd()) {
1290 * Do dummy first-time call to seal the kernel's time warp magic
1292 * Do not call this this from inside the initrd. The initrd might not
1293 * carry /etc/adjtime with LOCAL, but the real system could be set up
1294 * that way. In such case, we need to delay the time-warp or the sealing
1295 * until we reach the real system.
1297 hwclock_reset_timezone();
1299 /* Tell the kernel our timezone */
1300 r = hwclock_set_timezone(NULL);
1302 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1306 /* Set the default for later on, but don't actually
1307 * open the logs like this for now. Note that if we
1308 * are transitioning from the initrd there might still
1309 * be journal fd open, and we shouldn't attempt
1310 * opening that before we parsed /proc/cmdline which
1311 * might redirect output elsewhere. */
1312 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1314 } else if (getpid() == 1) {
1315 /* Running inside a container, as PID 1 */
1316 arg_running_as = SYSTEMD_SYSTEM;
1317 log_set_target(LOG_TARGET_CONSOLE);
1320 /* For the later on, see above... */
1321 log_set_target(LOG_TARGET_JOURNAL);
1323 /* clear the kernel timestamp,
1324 * because we are in a container */
1325 kernel_timestamp.monotonic = 0ULL;
1326 kernel_timestamp.realtime = 0ULL;
1329 /* Running as user instance */
1330 arg_running_as = SYSTEMD_USER;
1331 log_set_target(LOG_TARGET_AUTO);
1334 /* clear the kernel timestamp,
1335 * because we are not PID 1 */
1336 kernel_timestamp.monotonic = 0ULL;
1337 kernel_timestamp.realtime = 0ULL;
1340 /* Initialize default unit */
1341 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1343 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1347 r = initialize_join_controllers();
1351 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1352 * /proc/$PID/fd is available. */
1353 if (getpid() == 1) {
1354 r = mount_setup(loaded_policy);
1359 /* Reset all signal handlers. */
1360 assert_se(reset_all_signal_handlers() == 0);
1362 ignore_signals(SIGNALS_IGNORE, -1);
1364 if (parse_config_file() < 0)
1367 if (arg_running_as == SYSTEMD_SYSTEM)
1368 if (parse_proc_cmdline() < 0)
1371 log_parse_environment();
1373 if (parse_argv(argc, argv) < 0)
1376 if (arg_action == ACTION_TEST &&
1378 log_error("Don't run test mode as root.");
1382 if (arg_running_as == SYSTEMD_USER &&
1383 arg_action == ACTION_RUN &&
1385 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1389 if (arg_running_as == SYSTEMD_SYSTEM &&
1390 arg_action == ACTION_RUN &&
1391 running_in_chroot() > 0) {
1392 log_error("Cannot be run in a chroot() environment.");
1396 if (arg_action == ACTION_HELP) {
1399 } else if (arg_action == ACTION_VERSION) {
1402 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1403 unit_dump_config_items(stdout);
1404 retval = EXIT_SUCCESS;
1406 } else if (arg_action == ACTION_DONE) {
1407 retval = EXIT_SUCCESS;
1411 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1413 /* Close logging fds, in order not to confuse fdset below */
1416 /* Remember open file descriptors for later deserialization */
1417 r = fdset_new_fill(&fds);
1419 log_error("Failed to allocate fd set: %s", strerror(-r));
1422 fdset_cloexec(fds, true);
1425 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1427 if (arg_running_as == SYSTEMD_SYSTEM)
1428 /* Become a session leader if we aren't one yet. */
1431 /* Move out of the way, so that we won't block unmounts */
1432 assert_se(chdir("/") == 0);
1434 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1435 dbus_connection_set_change_sigpipe(FALSE);
1437 /* Reset the console, but only if this is really init and we
1438 * are freshly booted */
1439 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1440 console_setup(getpid() == 1 && !skip_setup);
1442 /* Open the logging devices, if possible and necessary */
1445 /* Make sure we leave a core dump without panicing the
1447 if (getpid() == 1) {
1448 install_crash_handler();
1450 r = mount_cgroup_controllers(arg_join_controllers);
1455 if (arg_running_as == SYSTEMD_SYSTEM) {
1456 const char *virtualization = NULL;
1458 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1460 detect_virtualization(&virtualization);
1462 log_info("Detected virtualization '%s'.", virtualization);
1465 log_info("Running in initial RAM disk.");
1468 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1470 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1471 if (arg_show_status || plymouth_running())
1486 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1487 watchdog_set_timeout(&arg_runtime_watchdog);
1489 if (arg_timer_slack_nsec != (nsec_t) -1)
1490 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1491 log_error("Failed to adjust timer slack: %m");
1493 if (arg_capability_bounding_set_drop) {
1494 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1496 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1499 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1501 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1506 if (arg_running_as == SYSTEMD_USER) {
1507 /* Become reaper of our children */
1508 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1509 log_warning("Failed to make us a subreaper: %m");
1510 if (errno == EINVAL)
1511 log_info("Perhaps the kernel version is too old (< 3.4?)");
1515 if (arg_running_as == SYSTEMD_SYSTEM)
1516 bump_rlimit_nofile(&saved_rlimit_nofile);
1518 r = manager_new(arg_running_as, !!serialization, &m);
1520 log_error("Failed to allocate manager object: %s", strerror(-r));
1524 m->confirm_spawn = arg_confirm_spawn;
1525 m->default_std_output = arg_default_std_output;
1526 m->default_std_error = arg_default_std_error;
1527 m->default_restart_usec = arg_default_restart_usec;
1528 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1529 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1530 m->runtime_watchdog = arg_runtime_watchdog;
1531 m->shutdown_watchdog = arg_shutdown_watchdog;
1532 m->userspace_timestamp = userspace_timestamp;
1533 m->kernel_timestamp = kernel_timestamp;
1534 m->initrd_timestamp = initrd_timestamp;
1536 manager_set_default_rlimits(m, arg_default_rlimit);
1538 if (arg_default_environment)
1539 manager_environment_add(m, arg_default_environment);
1541 manager_set_show_status(m, arg_show_status);
1543 /* Remember whether we should queue the default job */
1544 queue_default_job = !serialization || arg_switched_root;
1546 before_startup = now(CLOCK_MONOTONIC);
1548 r = manager_startup(m, serialization, fds);
1550 log_error("Failed to fully start up daemon: %s", strerror(-r));
1552 /* This will close all file descriptors that were opened, but
1553 * not claimed by any unit. */
1557 if (serialization) {
1558 fclose(serialization);
1559 serialization = NULL;
1562 if (queue_default_job) {
1564 Unit *target = NULL;
1565 Job *default_unit_job;
1567 dbus_error_init(&error);
1569 log_debug("Activating default unit: %s", arg_default_unit);
1571 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1573 log_error("Failed to load default target: %s", bus_error(&error, r));
1574 dbus_error_free(&error);
1575 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1576 log_error("Failed to load default target: %s", strerror(-target->load_error));
1577 else if (target->load_state == UNIT_MASKED)
1578 log_error("Default target masked.");
1580 if (!target || target->load_state != UNIT_LOADED) {
1581 log_info("Trying to load rescue target...");
1583 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1585 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1586 dbus_error_free(&error);
1588 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1589 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1591 } else if (target->load_state == UNIT_MASKED) {
1592 log_error("Rescue target masked.");
1597 assert(target->load_state == UNIT_LOADED);
1599 if (arg_action == ACTION_TEST) {
1600 printf("-> By units:\n");
1601 manager_dump_units(m, stdout, "\t");
1604 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1606 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1607 dbus_error_free(&error);
1609 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1611 log_error("Failed to start default target: %s", bus_error(&error, r));
1612 dbus_error_free(&error);
1616 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1617 dbus_error_free(&error);
1621 m->default_unit_job_id = default_unit_job->id;
1623 after_startup = now(CLOCK_MONOTONIC);
1624 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1625 "Loaded units and determined initial transaction in %s.",
1626 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1628 if (arg_action == ACTION_TEST) {
1629 printf("-> By jobs:\n");
1630 manager_dump_jobs(m, stdout, "\t");
1631 retval = EXIT_SUCCESS;
1637 r = manager_loop(m);
1639 log_error("Failed to run mainloop: %s", strerror(-r));
1643 switch (m->exit_code) {
1646 retval = EXIT_SUCCESS;
1650 case MANAGER_RELOAD:
1651 log_info("Reloading.");
1652 r = manager_reload(m);
1654 log_error("Failed to reload: %s", strerror(-r));
1657 case MANAGER_REEXECUTE:
1659 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1663 log_notice("Reexecuting.");
1666 case MANAGER_SWITCH_ROOT:
1667 /* Steal the switch root parameters */
1668 switch_root_dir = m->switch_root;
1669 switch_root_init = m->switch_root_init;
1670 m->switch_root = m->switch_root_init = NULL;
1672 if (!switch_root_init)
1673 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1677 log_notice("Switching root.");
1680 case MANAGER_REBOOT:
1681 case MANAGER_POWEROFF:
1683 case MANAGER_KEXEC: {
1684 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1685 [MANAGER_REBOOT] = "reboot",
1686 [MANAGER_POWEROFF] = "poweroff",
1687 [MANAGER_HALT] = "halt",
1688 [MANAGER_KEXEC] = "kexec"
1691 assert_se(shutdown_verb = table[m->exit_code]);
1692 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1694 log_notice("Shutting down.");
1699 assert_not_reached("Unknown exit code.");
1707 for (j = 0; j < RLIMIT_NLIMITS; j++)
1708 free(arg_default_rlimit[j]);
1710 free(arg_default_unit);
1711 free_join_controllers();
1718 unsigned i, args_size;
1720 /* Close and disarm the watchdog, so that the new
1721 * instance can reinitialize it, but doesn't get
1722 * rebooted while we do that */
1723 watchdog_close(true);
1725 /* Reset the RLIMIT_NOFILE to the kernel default, so
1726 * that the new systemd can pass the kernel default to
1727 * its child processes */
1728 if (saved_rlimit_nofile.rlim_cur > 0)
1729 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1731 if (switch_root_dir) {
1732 /* Kill all remaining processes from the
1733 * initrd, but don't wait for them, so that we
1734 * can handle the SIGCHLD for them after
1736 broadcast_signal(SIGTERM, false);
1738 /* And switch root */
1739 r = switch_root(switch_root_dir);
1741 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1744 args_size = MAX(6, argc+1);
1745 args = newa(const char*, args_size);
1747 if (!switch_root_init) {
1750 /* First try to spawn ourselves with the right
1751 * path, and with full serialization. We do
1752 * this only if the user didn't specify an
1753 * explicit init to spawn. */
1755 assert(serialization);
1758 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1762 args[i++] = SYSTEMD_BINARY_PATH;
1763 if (switch_root_dir)
1764 args[i++] = "--switched-root";
1765 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1766 args[i++] = "--deserialize";
1770 /* do not pass along the environment we inherit from the kernel or initrd */
1771 if (switch_root_dir)
1774 assert(i <= args_size);
1775 execv(args[0], (char* const*) args);
1778 /* Try the fallback, if there is any, without any
1779 * serialization. We pass the original argv[] and
1780 * envp[]. (Well, modulo the ordering changes due to
1781 * getopt() in argv[], and some cleanups in envp[],
1782 * but let's hope that doesn't matter.) */
1784 if (serialization) {
1785 fclose(serialization);
1786 serialization = NULL;
1794 /* Reopen the console */
1795 make_console_stdio();
1797 for (j = 1, i = 1; j < argc; j++)
1798 args[i++] = argv[j];
1800 assert(i <= args_size);
1802 if (switch_root_init) {
1803 args[0] = switch_root_init;
1804 execv(args[0], (char* const*) args);
1805 log_warning("Failed to execute configured init, trying fallback: %m");
1808 args[0] = "/sbin/init";
1809 execv(args[0], (char* const*) args);
1811 if (errno == ENOENT) {
1812 log_warning("No /sbin/init, trying fallback");
1814 args[0] = "/bin/sh";
1816 execv(args[0], (char* const*) args);
1817 log_error("Failed to execute /bin/sh, giving up: %m");
1819 log_warning("Failed to execute /sbin/init, giving up: %m");
1823 fclose(serialization);
1828 if (shutdown_verb) {
1829 const char * command_line[] = {
1830 SYSTEMD_SHUTDOWN_BINARY_PATH,
1836 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1839 /* If we reboot let's set the shutdown
1840 * watchdog and tell the shutdown binary to
1841 * repeatedly ping it */
1842 watchdog_set_timeout(&arg_shutdown_watchdog);
1843 watchdog_close(false);
1845 /* Tell the binary how often to ping */
1846 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1849 env_block = strv_append(environ, e);
1851 env_block = strv_copy(environ);
1852 watchdog_close(true);
1855 /* Avoid the creation of new processes forked by the
1856 * kernel; at this point, we will not listen to the
1858 if (detect_container(NULL) <= 0)
1859 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1861 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1863 log_error("Failed to execute shutdown binary, freezing: %m");