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_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
97 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
98 static usec_t arg_runtime_watchdog = 0;
99 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
100 static char **arg_default_environment = NULL;
101 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
102 static uint64_t arg_capability_bounding_set_drop = 0;
103 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
105 static FILE* serialization = NULL;
107 static void nop_handler(int sig) {
110 _noreturn_ static void crash(int sig) {
113 /* Pass this on immediately, if this is not PID 1 */
115 else if (!arg_dump_core)
116 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
118 struct sigaction sa = {
119 .sa_handler = nop_handler,
120 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
124 /* We want to wait for the core process, hence let's enable SIGCHLD */
125 sigaction(SIGCHLD, &sa, NULL);
129 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
132 struct rlimit rl = {};
134 /* Enable default signal handler for core dump */
136 sa.sa_handler = SIG_DFL;
137 sigaction(sig, &sa, NULL);
139 /* Don't limit the core dump size */
140 rl.rlim_cur = RLIM_INFINITY;
141 rl.rlim_max = RLIM_INFINITY;
142 setrlimit(RLIMIT_CORE, &rl);
144 /* Just to be sure... */
147 /* Raise the signal again */
150 assert_not_reached("We shouldn't be here...");
157 /* Order things nicely. */
158 r = wait_for_terminate(pid, &status);
160 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
161 else if (status.si_code != CLD_DUMPED)
162 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
164 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
169 chvt(arg_crash_chvt);
171 if (arg_crash_shell) {
172 struct sigaction sa = {
173 .sa_handler = SIG_IGN,
174 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
178 log_info("Executing crash shell in 10s...");
181 /* Let the kernel reap children for us */
182 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
186 log_error("Failed to fork off crash shell: %m");
188 make_console_stdio();
189 execl("/bin/sh", "/bin/sh", NULL);
191 log_error("execl() failed: %m");
195 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
198 log_info("Freezing execution.");
202 static void install_crash_handler(void) {
203 struct sigaction sa = {
205 .sa_flags = SA_NODEFER,
208 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
211 static int console_setup(bool do_reset) {
214 /* If we are init, we connect stdin/stdout/stderr to /dev/null
215 * and make sure we don't have a controlling tty. */
222 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
224 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
228 /* We don't want to force text mode.
229 * plymouth may be showing pictures already from initrd. */
230 r = reset_terminal_fd(tty_fd, false);
232 log_error("Failed to reset /dev/console: %s", strerror(-r));
234 close_nointr_nofail(tty_fd);
238 static int set_default_unit(const char *u) {
247 free(arg_default_unit);
248 arg_default_unit = c;
253 static int parse_proc_cmdline_word(const char *word) {
255 static const char * const rlmap[] = {
256 "emergency", SPECIAL_EMERGENCY_TARGET,
257 "-b", SPECIAL_EMERGENCY_TARGET,
258 "single", SPECIAL_RESCUE_TARGET,
259 "-s", SPECIAL_RESCUE_TARGET,
260 "s", SPECIAL_RESCUE_TARGET,
261 "S", SPECIAL_RESCUE_TARGET,
262 "1", SPECIAL_RESCUE_TARGET,
263 "2", SPECIAL_RUNLEVEL2_TARGET,
264 "3", SPECIAL_RUNLEVEL3_TARGET,
265 "4", SPECIAL_RUNLEVEL4_TARGET,
266 "5", SPECIAL_RUNLEVEL5_TARGET,
271 if (startswith(word, "systemd.unit=")) {
274 return set_default_unit(word + 13);
276 } else if (startswith(word, "rd.systemd.unit=")) {
279 return set_default_unit(word + 16);
281 } else if (startswith(word, "systemd.log_target=")) {
283 if (log_set_target_from_string(word + 19) < 0)
284 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
286 } else if (startswith(word, "systemd.log_level=")) {
288 if (log_set_max_level_from_string(word + 18) < 0)
289 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
291 } else if (startswith(word, "systemd.log_color=")) {
293 if (log_show_color_from_string(word + 18) < 0)
294 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
296 } else if (startswith(word, "systemd.log_location=")) {
298 if (log_show_location_from_string(word + 21) < 0)
299 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
301 } else if (startswith(word, "systemd.dump_core=")) {
304 if ((r = parse_boolean(word + 18)) < 0)
305 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
309 } else if (startswith(word, "systemd.crash_shell=")) {
312 if ((r = parse_boolean(word + 20)) < 0)
313 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
317 } else if (startswith(word, "systemd.confirm_spawn=")) {
320 if ((r = parse_boolean(word + 22)) < 0)
321 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
323 arg_confirm_spawn = r;
325 } else if (startswith(word, "systemd.crash_chvt=")) {
328 if (safe_atoi(word + 19, &k) < 0)
329 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
333 } else if (startswith(word, "systemd.show_status=")) {
336 if ((r = parse_boolean(word + 20)) < 0)
337 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
340 } else if (startswith(word, "systemd.default_standard_output=")) {
343 if ((r = exec_output_from_string(word + 32)) < 0)
344 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
346 arg_default_std_output = r;
347 } else if (startswith(word, "systemd.default_standard_error=")) {
350 if ((r = exec_output_from_string(word + 31)) < 0)
351 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
353 arg_default_std_error = r;
354 } else if (startswith(word, "systemd.setenv=")) {
355 _cleanup_free_ char *cenv = NULL;
357 cenv = strdup(word + 15);
361 if (env_assignment_is_valid(cenv)) {
364 env = strv_env_set(arg_default_environment, cenv);
366 arg_default_environment = env;
368 log_warning("Setting environment variable '%s' failed, ignoring: %m", cenv);
370 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
372 } else if (startswith(word, "systemd.") ||
373 (in_initrd() && startswith(word, "rd.systemd."))) {
377 /* Ignore systemd.journald.xyz and friends */
379 if (startswith(c, "rd."))
381 if (startswith(c, "systemd."))
383 if (c[strcspn(c, ".=")] != '.') {
385 log_warning("Unknown kernel switch %s. Ignoring.", word);
387 log_info("Supported kernel switches:\n"
388 "systemd.unit=UNIT Default unit to start\n"
389 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
390 "systemd.dump_core=0|1 Dump core on crash\n"
391 "systemd.crash_shell=0|1 Run shell on crash\n"
392 "systemd.crash_chvt=N Change to VT #N on crash\n"
393 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
394 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
395 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
397 "systemd.log_level=LEVEL Log level\n"
398 "systemd.log_color=0|1 Highlight important log messages\n"
399 "systemd.log_location=0|1 Include code location in log messages\n"
400 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
401 " Set default log output for services\n"
402 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
403 " Set default log error output for services\n"
404 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
407 } else if (streq(word, "quiet"))
408 arg_show_status = false;
409 else if (streq(word, "debug")) {
410 /* Log to kmsg, the journal socket will fill up before the
411 * journal is started and tools running during that time
412 * will block with every log message for for 60 seconds,
413 * before they give up. */
414 log_set_max_level(LOG_DEBUG);
415 log_set_target(LOG_TARGET_KMSG);
416 } else if (!in_initrd()) {
419 /* SysV compatibility */
420 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
421 if (streq(word, rlmap[i]))
422 return set_default_unit(rlmap[i+1]);
428 #define DEFINE_SETTER(name, func, descr) \
429 static int name(const char *unit, \
430 const char *filename, \
432 const char *section, \
433 const char *lvalue, \
435 const char *rvalue, \
447 log_syntax(unit, LOG_ERR, filename, line, -r, \
448 "Invalid " descr "'%s': %s", \
449 rvalue, strerror(-r)); \
454 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
455 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
456 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
457 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
460 static int config_parse_cpu_affinity2(const char *unit,
461 const char *filename,
480 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
485 if (!(t = strndup(w, l)))
488 r = safe_atou(t, &cpu);
492 if (!(c = cpu_set_malloc(&ncpus)))
495 if (r < 0 || cpu >= ncpus) {
496 log_syntax(unit, LOG_ERR, filename, line, -r,
497 "Failed to parse CPU affinity '%s'", rvalue);
502 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
506 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
507 log_warning_unit(unit, "Failed to set CPU affinity: %m");
515 static void strv_free_free(char ***l) {
527 static void free_join_controllers(void) {
528 strv_free_free(arg_join_controllers);
529 arg_join_controllers = NULL;
532 static int config_parse_join_controllers(const char *unit,
533 const char *filename,
550 free_join_controllers();
552 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
555 s = strndup(w, length);
559 l = strv_split(s, ",");
564 if (strv_length(l) <= 1) {
569 if (!arg_join_controllers) {
570 arg_join_controllers = new(char**, 2);
571 if (!arg_join_controllers) {
576 arg_join_controllers[0] = l;
577 arg_join_controllers[1] = NULL;
584 t = new0(char**, n+2);
592 for (a = arg_join_controllers; *a; a++) {
594 if (strv_overlap(*a, l)) {
597 c = strv_merge(*a, l);
620 t[n++] = strv_uniq(l);
622 strv_free_free(arg_join_controllers);
623 arg_join_controllers = t;
630 static int parse_config_file(void) {
632 const ConfigTableItem items[] = {
633 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
634 { "Manager", "LogTarget", config_parse_target, 0, NULL },
635 { "Manager", "LogColor", config_parse_color, 0, NULL },
636 { "Manager", "LogLocation", config_parse_location, 0, NULL },
637 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
638 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
639 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
640 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
641 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
642 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
643 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
644 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
645 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
646 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
647 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
648 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
649 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
650 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
651 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
652 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
653 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
654 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
655 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
656 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
657 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
658 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
659 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
660 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
661 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
662 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
663 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
664 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
665 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
666 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
667 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
668 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
669 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
670 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
671 { NULL, NULL, NULL, 0, NULL }
674 _cleanup_fclose_ FILE *f;
678 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
684 log_warning("Failed to open configuration file '%s': %m", fn);
688 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
690 log_warning("Failed to parse configuration file: %s", strerror(-r));
695 static int parse_proc_cmdline(void) {
696 _cleanup_free_ char *line = NULL;
701 r = proc_cmdline(&line);
703 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
707 FOREACH_WORD_QUOTED(w, l, line, state) {
708 _cleanup_free_ char *word;
710 word = strndup(w, l);
714 r = parse_proc_cmdline_word(word);
716 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
724 static int parse_argv(int argc, char *argv[]) {
727 ARG_LOG_LEVEL = 0x100,
736 ARG_DUMP_CONFIGURATION_ITEMS,
743 ARG_DEFAULT_STD_OUTPUT,
744 ARG_DEFAULT_STD_ERROR
747 static const struct option options[] = {
748 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
749 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
750 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
751 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
752 { "unit", required_argument, NULL, ARG_UNIT },
753 { "system", no_argument, NULL, ARG_SYSTEM },
754 { "user", no_argument, NULL, ARG_USER },
755 { "test", no_argument, NULL, ARG_TEST },
756 { "help", no_argument, NULL, 'h' },
757 { "version", no_argument, NULL, ARG_VERSION },
758 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
759 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
760 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
761 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
762 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
763 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
764 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
765 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
766 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
778 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
783 if ((r = log_set_max_level_from_string(optarg)) < 0) {
784 log_error("Failed to parse log level %s.", optarg);
792 if ((r = log_set_target_from_string(optarg)) < 0) {
793 log_error("Failed to parse log target %s.", optarg);
802 if ((r = log_show_color_from_string(optarg)) < 0) {
803 log_error("Failed to parse log color setting %s.", optarg);
807 log_show_color(true);
811 case ARG_LOG_LOCATION:
814 if ((r = log_show_location_from_string(optarg)) < 0) {
815 log_error("Failed to parse log location setting %s.", optarg);
819 log_show_location(true);
823 case ARG_DEFAULT_STD_OUTPUT:
825 if ((r = exec_output_from_string(optarg)) < 0) {
826 log_error("Failed to parse default standard output setting %s.", optarg);
829 arg_default_std_output = r;
832 case ARG_DEFAULT_STD_ERROR:
834 if ((r = exec_output_from_string(optarg)) < 0) {
835 log_error("Failed to parse default standard error output setting %s.", optarg);
838 arg_default_std_error = r;
843 if ((r = set_default_unit(optarg)) < 0) {
844 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
851 arg_running_as = SYSTEMD_SYSTEM;
855 arg_running_as = SYSTEMD_USER;
859 arg_action = ACTION_TEST;
863 arg_action = ACTION_VERSION;
866 case ARG_DUMP_CONFIGURATION_ITEMS:
867 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
871 r = optarg ? parse_boolean(optarg) : 1;
873 log_error("Failed to parse dump core boolean %s.", optarg);
879 case ARG_CRASH_SHELL:
880 r = optarg ? parse_boolean(optarg) : 1;
882 log_error("Failed to parse crash shell boolean %s.", optarg);
888 case ARG_CONFIRM_SPAWN:
889 r = optarg ? parse_boolean(optarg) : 1;
891 log_error("Failed to parse confirm spawn boolean %s.", optarg);
894 arg_confirm_spawn = r;
897 case ARG_SHOW_STATUS:
898 r = optarg ? parse_boolean(optarg) : 1;
900 log_error("Failed to parse show status boolean %s.", optarg);
906 case ARG_DESERIALIZE: {
910 r = safe_atoi(optarg, &fd);
911 if (r < 0 || fd < 0) {
912 log_error("Failed to parse deserialize option %s.", optarg);
913 return r < 0 ? r : -EINVAL;
916 fd_cloexec(fd, true);
920 log_error("Failed to open serialization fd: %m");
925 fclose(serialization);
932 case ARG_SWITCHED_ROOT:
933 arg_switched_root = true;
937 arg_action = ACTION_HELP;
941 log_set_max_level(LOG_DEBUG);
947 /* Just to eat away the sysvinit kernel
948 * cmdline args without getopt() error
949 * messages that we'll parse in
950 * parse_proc_cmdline_word() or ignore. */
955 log_error("Unknown option code %c", c);
962 if (optind < argc && getpid() != 1) {
963 /* Hmm, when we aren't run as init system
964 * let's complain about excess arguments */
966 log_error("Excess arguments.");
970 if (detect_container(NULL) > 0) {
973 /* All /proc/cmdline arguments the kernel didn't
974 * understand it passed to us. We're not really
975 * interested in that usually since /proc/cmdline is
976 * more interesting and complete. With one exception:
977 * if we are run in a container /proc/cmdline is not
978 * relevant for the container, hence we rely on argv[]
981 for (a = argv; a < argv + argc; a++) {
982 r = parse_proc_cmdline_word(*a);
984 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
993 static int help(void) {
995 printf("%s [OPTIONS...]\n\n"
996 "Starts up and maintains the system or user services.\n\n"
997 " -h --help Show this help\n"
998 " --test Determine startup sequence, dump it and exit\n"
999 " --dump-configuration-items Dump understood unit configuration items\n"
1000 " --unit=UNIT Set default unit\n"
1001 " --system Run a system instance, even if PID != 1\n"
1002 " --user Run a user instance\n"
1003 " --dump-core[=0|1] Dump core on crash\n"
1004 " --crash-shell[=0|1] Run shell on crash\n"
1005 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1006 " --show-status[=0|1] Show status updates on the console during bootup\n"
1007 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1008 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1009 " --log-color[=0|1] Highlight important log messages\n"
1010 " --log-location[=0|1] Include code location in log messages\n"
1011 " --default-standard-output= Set default standard output for services\n"
1012 " --default-standard-error= Set default standard error output for services\n",
1013 program_invocation_short_name);
1018 static int version(void) {
1019 puts(PACKAGE_STRING);
1020 puts(SYSTEMD_FEATURES);
1025 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1034 r = manager_open_serialization(m, &f);
1036 log_error("Failed to create serialization file: %s", strerror(-r));
1040 /* Make sure nothing is really destructed when we shut down */
1042 bus_broadcast_reloading(m, true);
1047 log_error("Failed to allocate fd set: %s", strerror(-r));
1051 r = manager_serialize(m, f, fds, switching_root);
1053 log_error("Failed to serialize state: %s", strerror(-r));
1057 if (fseeko(f, 0, SEEK_SET) < 0) {
1058 log_error("Failed to rewind serialization fd: %m");
1062 r = fd_cloexec(fileno(f), false);
1064 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1068 r = fdset_cloexec(fds, false);
1070 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1088 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1092 assert(saved_rlimit);
1094 /* Save the original RLIMIT_NOFILE so that we can reset it
1095 * later when transitioning from the initrd to the main
1096 * systemd or suchlike. */
1097 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1098 log_error("Reading RLIMIT_NOFILE failed: %m");
1102 /* Make sure forked processes get the default kernel setting */
1103 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1106 rl = newdup(struct rlimit, saved_rlimit, 1);
1110 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1113 /* Bump up the resource limit for ourselves substantially */
1114 nl.rlim_cur = nl.rlim_max = 64*1024;
1115 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1117 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1124 static void test_mtab(void) {
1127 /* Check that /etc/mtab is a symlink */
1129 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1132 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1139 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1140 "This is not supported anymore. "
1141 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1144 static void test_usr(void) {
1146 /* Check that /usr is not a separate fs */
1148 if (dir_is_empty("/usr") <= 0)
1151 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1152 "Some things will probably break (sometimes even silently) in mysterious ways. "
1153 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1156 static void test_cgroups(void) {
1158 if (access("/proc/cgroups", F_OK) >= 0)
1161 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1162 "Systems without control groups are not supported. "
1163 "We will now sleep for 10s, and then continue boot-up. "
1164 "Expect breakage and please do not file bugs. "
1165 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1166 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1171 static int initialize_join_controllers(void) {
1172 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1173 * + "net_prio". We'd like to add "cpuset" to the mix, but
1174 * "cpuset" does't really work for groups with no initialized
1177 arg_join_controllers = new(char**, 3);
1178 if (!arg_join_controllers)
1181 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1182 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1183 arg_join_controllers[2] = NULL;
1185 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1186 free_join_controllers();
1193 int main(int argc, char *argv[]) {
1195 int r, retval = EXIT_FAILURE;
1196 usec_t before_startup, after_startup;
1197 char timespan[FORMAT_TIMESPAN_MAX];
1199 bool reexecute = false;
1200 const char *shutdown_verb = NULL;
1201 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1202 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1203 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1204 static char systemd[] = "systemd";
1205 bool skip_setup = false;
1207 bool loaded_policy = false;
1208 bool arm_reboot_watchdog = false;
1209 bool queue_default_job = false;
1210 char *switch_root_dir = NULL, *switch_root_init = NULL;
1211 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1213 #ifdef HAVE_SYSV_COMPAT
1214 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1215 /* This is compatibility support for SysV, where
1216 * calling init as a user is identical to telinit. */
1219 execv(SYSTEMCTL_BINARY_PATH, argv);
1220 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1225 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1226 dual_timestamp_get(&userspace_timestamp);
1228 /* Determine if this is a reexecution or normal bootup. We do
1229 * the full command line parsing much later, so let's just
1230 * have a quick peek here. */
1231 if (strv_find(argv+1, "--deserialize"))
1234 /* If we have switched root, do all the special setup
1236 if (strv_find(argv+1, "--switched-root"))
1239 /* If we get started via the /sbin/init symlink then we are
1240 called 'init'. After a subsequent reexecution we are then
1241 called 'systemd'. That is confusing, hence let's call us
1242 systemd right-away. */
1243 program_invocation_short_name = systemd;
1244 prctl(PR_SET_NAME, systemd);
1249 log_show_color(isatty(STDERR_FILENO) > 0);
1251 /* Disable the umask logic */
1255 if (getpid() == 1 && detect_container(NULL) <= 0) {
1257 /* Running outside of a container as PID 1 */
1258 arg_running_as = SYSTEMD_SYSTEM;
1260 log_set_target(LOG_TARGET_KMSG);
1264 initrd_timestamp = userspace_timestamp;
1267 mount_setup_early();
1268 if (selinux_setup(&loaded_policy) < 0)
1270 if (ima_setup() < 0)
1272 if (smack_setup() < 0)
1276 if (label_init(NULL) < 0)
1280 if (hwclock_is_localtime() > 0) {
1283 /* The first-time call to settimeofday() does a time warp in the kernel */
1284 r = hwclock_set_timezone(&min);
1286 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1288 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1289 } else if (!in_initrd()) {
1291 * Do dummy first-time call to seal the kernel's time warp magic
1293 * Do not call this this from inside the initrd. The initrd might not
1294 * carry /etc/adjtime with LOCAL, but the real system could be set up
1295 * that way. In such case, we need to delay the time-warp or the sealing
1296 * until we reach the real system.
1298 hwclock_reset_timezone();
1300 /* Tell the kernel our timezone */
1301 r = hwclock_set_timezone(NULL);
1303 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1307 /* Set the default for later on, but don't actually
1308 * open the logs like this for now. Note that if we
1309 * are transitioning from the initrd there might still
1310 * be journal fd open, and we shouldn't attempt
1311 * opening that before we parsed /proc/cmdline which
1312 * might redirect output elsewhere. */
1313 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1315 } else if (getpid() == 1) {
1316 /* Running inside a container, as PID 1 */
1317 arg_running_as = SYSTEMD_SYSTEM;
1318 log_set_target(LOG_TARGET_CONSOLE);
1321 /* For the later on, see above... */
1322 log_set_target(LOG_TARGET_JOURNAL);
1324 /* clear the kernel timestamp,
1325 * because we are in a container */
1326 kernel_timestamp.monotonic = 0ULL;
1327 kernel_timestamp.realtime = 0ULL;
1330 /* Running as user instance */
1331 arg_running_as = SYSTEMD_USER;
1332 log_set_target(LOG_TARGET_AUTO);
1335 /* clear the kernel timestamp,
1336 * because we are not PID 1 */
1337 kernel_timestamp.monotonic = 0ULL;
1338 kernel_timestamp.realtime = 0ULL;
1341 /* Initialize default unit */
1342 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1344 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1348 r = initialize_join_controllers();
1352 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1353 * /proc/$PID/fd is available. */
1354 if (getpid() == 1) {
1355 r = mount_setup(loaded_policy);
1360 /* Reset all signal handlers. */
1361 assert_se(reset_all_signal_handlers() == 0);
1363 ignore_signals(SIGNALS_IGNORE, -1);
1365 if (parse_config_file() < 0)
1368 if (arg_running_as == SYSTEMD_SYSTEM)
1369 if (parse_proc_cmdline() < 0)
1372 log_parse_environment();
1374 if (parse_argv(argc, argv) < 0)
1377 if (arg_action == ACTION_TEST &&
1379 log_error("Don't run test mode as root.");
1383 if (arg_running_as == SYSTEMD_USER &&
1384 arg_action == ACTION_RUN &&
1386 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1390 if (arg_running_as == SYSTEMD_SYSTEM &&
1391 arg_action == ACTION_RUN &&
1392 running_in_chroot() > 0) {
1393 log_error("Cannot be run in a chroot() environment.");
1397 if (arg_action == ACTION_HELP) {
1400 } else if (arg_action == ACTION_VERSION) {
1403 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1404 unit_dump_config_items(stdout);
1405 retval = EXIT_SUCCESS;
1407 } else if (arg_action == ACTION_DONE) {
1408 retval = EXIT_SUCCESS;
1412 if (arg_running_as == SYSTEMD_USER &&
1413 !getenv("XDG_RUNTIME_DIR")) {
1414 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1418 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1420 /* Close logging fds, in order not to confuse fdset below */
1423 /* Remember open file descriptors for later deserialization */
1424 r = fdset_new_fill(&fds);
1426 log_error("Failed to allocate fd set: %s", strerror(-r));
1429 fdset_cloexec(fds, true);
1432 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1434 if (arg_running_as == SYSTEMD_SYSTEM)
1435 /* Become a session leader if we aren't one yet. */
1438 /* Move out of the way, so that we won't block unmounts */
1439 assert_se(chdir("/") == 0);
1441 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1442 dbus_connection_set_change_sigpipe(FALSE);
1444 /* Reset the console, but only if this is really init and we
1445 * are freshly booted */
1446 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1447 console_setup(getpid() == 1 && !skip_setup);
1449 /* Open the logging devices, if possible and necessary */
1452 /* Make sure we leave a core dump without panicing the
1454 if (getpid() == 1) {
1455 install_crash_handler();
1457 r = mount_cgroup_controllers(arg_join_controllers);
1462 if (arg_running_as == SYSTEMD_SYSTEM) {
1463 const char *virtualization = NULL;
1465 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1467 detect_virtualization(&virtualization);
1469 log_info("Detected virtualization '%s'.", virtualization);
1472 log_info("Running in initial RAM disk.");
1475 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1477 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1478 if (arg_show_status || plymouth_running())
1493 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1494 watchdog_set_timeout(&arg_runtime_watchdog);
1496 if (arg_timer_slack_nsec != (nsec_t) -1)
1497 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1498 log_error("Failed to adjust timer slack: %m");
1500 if (arg_capability_bounding_set_drop) {
1501 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1503 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1506 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1508 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1513 if (arg_running_as == SYSTEMD_USER) {
1514 /* Become reaper of our children */
1515 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1516 log_warning("Failed to make us a subreaper: %m");
1517 if (errno == EINVAL)
1518 log_info("Perhaps the kernel version is too old (< 3.4?)");
1522 if (arg_running_as == SYSTEMD_SYSTEM)
1523 bump_rlimit_nofile(&saved_rlimit_nofile);
1525 r = manager_new(arg_running_as, !!serialization, &m);
1527 log_error("Failed to allocate manager object: %s", strerror(-r));
1531 m->confirm_spawn = arg_confirm_spawn;
1532 m->default_std_output = arg_default_std_output;
1533 m->default_std_error = arg_default_std_error;
1534 m->default_restart_usec = arg_default_restart_usec;
1535 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1536 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1537 m->default_start_limit_interval = arg_default_start_limit_interval;
1538 m->default_start_limit_burst = arg_default_start_limit_burst;
1539 m->runtime_watchdog = arg_runtime_watchdog;
1540 m->shutdown_watchdog = arg_shutdown_watchdog;
1541 m->userspace_timestamp = userspace_timestamp;
1542 m->kernel_timestamp = kernel_timestamp;
1543 m->initrd_timestamp = initrd_timestamp;
1545 manager_set_default_rlimits(m, arg_default_rlimit);
1547 if (arg_default_environment)
1548 manager_environment_add(m, arg_default_environment);
1550 manager_set_show_status(m, arg_show_status);
1552 /* Remember whether we should queue the default job */
1553 queue_default_job = !serialization || arg_switched_root;
1555 before_startup = now(CLOCK_MONOTONIC);
1557 r = manager_startup(m, serialization, fds);
1559 log_error("Failed to fully start up daemon: %s", strerror(-r));
1561 /* This will close all file descriptors that were opened, but
1562 * not claimed by any unit. */
1566 if (serialization) {
1567 fclose(serialization);
1568 serialization = NULL;
1571 if (queue_default_job) {
1573 Unit *target = NULL;
1574 Job *default_unit_job;
1576 dbus_error_init(&error);
1578 log_debug("Activating default unit: %s", arg_default_unit);
1580 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1582 log_error("Failed to load default target: %s", bus_error(&error, r));
1583 dbus_error_free(&error);
1584 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1585 log_error("Failed to load default target: %s", strerror(-target->load_error));
1586 else if (target->load_state == UNIT_MASKED)
1587 log_error("Default target masked.");
1589 if (!target || target->load_state != UNIT_LOADED) {
1590 log_info("Trying to load rescue target...");
1592 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1594 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1595 dbus_error_free(&error);
1597 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1598 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1600 } else if (target->load_state == UNIT_MASKED) {
1601 log_error("Rescue target masked.");
1606 assert(target->load_state == UNIT_LOADED);
1608 if (arg_action == ACTION_TEST) {
1609 printf("-> By units:\n");
1610 manager_dump_units(m, stdout, "\t");
1613 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1615 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1616 dbus_error_free(&error);
1618 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1620 log_error("Failed to start default target: %s", bus_error(&error, r));
1621 dbus_error_free(&error);
1625 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1626 dbus_error_free(&error);
1630 m->default_unit_job_id = default_unit_job->id;
1632 after_startup = now(CLOCK_MONOTONIC);
1633 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1634 "Loaded units and determined initial transaction in %s.",
1635 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1637 if (arg_action == ACTION_TEST) {
1638 printf("-> By jobs:\n");
1639 manager_dump_jobs(m, stdout, "\t");
1640 retval = EXIT_SUCCESS;
1646 r = manager_loop(m);
1648 log_error("Failed to run mainloop: %s", strerror(-r));
1652 switch (m->exit_code) {
1655 retval = EXIT_SUCCESS;
1659 case MANAGER_RELOAD:
1660 log_info("Reloading.");
1661 r = manager_reload(m);
1663 log_error("Failed to reload: %s", strerror(-r));
1666 case MANAGER_REEXECUTE:
1668 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1672 log_notice("Reexecuting.");
1675 case MANAGER_SWITCH_ROOT:
1676 /* Steal the switch root parameters */
1677 switch_root_dir = m->switch_root;
1678 switch_root_init = m->switch_root_init;
1679 m->switch_root = m->switch_root_init = NULL;
1681 if (!switch_root_init)
1682 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1686 log_notice("Switching root.");
1689 case MANAGER_REBOOT:
1690 case MANAGER_POWEROFF:
1692 case MANAGER_KEXEC: {
1693 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1694 [MANAGER_REBOOT] = "reboot",
1695 [MANAGER_POWEROFF] = "poweroff",
1696 [MANAGER_HALT] = "halt",
1697 [MANAGER_KEXEC] = "kexec"
1700 assert_se(shutdown_verb = table[m->exit_code]);
1701 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1703 log_notice("Shutting down.");
1708 assert_not_reached("Unknown exit code.");
1716 for (j = 0; j < RLIMIT_NLIMITS; j++)
1717 free(arg_default_rlimit[j]);
1719 free(arg_default_unit);
1720 free_join_controllers();
1727 unsigned i, args_size;
1729 /* Close and disarm the watchdog, so that the new
1730 * instance can reinitialize it, but doesn't get
1731 * rebooted while we do that */
1732 watchdog_close(true);
1734 /* Reset the RLIMIT_NOFILE to the kernel default, so
1735 * that the new systemd can pass the kernel default to
1736 * its child processes */
1737 if (saved_rlimit_nofile.rlim_cur > 0)
1738 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1740 if (switch_root_dir) {
1741 /* Kill all remaining processes from the
1742 * initrd, but don't wait for them, so that we
1743 * can handle the SIGCHLD for them after
1745 broadcast_signal(SIGTERM, false);
1747 /* And switch root */
1748 r = switch_root(switch_root_dir);
1750 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1753 args_size = MAX(6, argc+1);
1754 args = newa(const char*, args_size);
1756 if (!switch_root_init) {
1759 /* First try to spawn ourselves with the right
1760 * path, and with full serialization. We do
1761 * this only if the user didn't specify an
1762 * explicit init to spawn. */
1764 assert(serialization);
1767 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1771 args[i++] = SYSTEMD_BINARY_PATH;
1772 if (switch_root_dir)
1773 args[i++] = "--switched-root";
1774 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1775 args[i++] = "--deserialize";
1779 /* do not pass along the environment we inherit from the kernel or initrd */
1780 if (switch_root_dir)
1783 assert(i <= args_size);
1784 execv(args[0], (char* const*) args);
1787 /* Try the fallback, if there is any, without any
1788 * serialization. We pass the original argv[] and
1789 * envp[]. (Well, modulo the ordering changes due to
1790 * getopt() in argv[], and some cleanups in envp[],
1791 * but let's hope that doesn't matter.) */
1793 if (serialization) {
1794 fclose(serialization);
1795 serialization = NULL;
1803 /* Reopen the console */
1804 make_console_stdio();
1806 for (j = 1, i = 1; j < argc; j++)
1807 args[i++] = argv[j];
1809 assert(i <= args_size);
1811 if (switch_root_init) {
1812 args[0] = switch_root_init;
1813 execv(args[0], (char* const*) args);
1814 log_warning("Failed to execute configured init, trying fallback: %m");
1817 args[0] = "/sbin/init";
1818 execv(args[0], (char* const*) args);
1820 if (errno == ENOENT) {
1821 log_warning("No /sbin/init, trying fallback");
1823 args[0] = "/bin/sh";
1825 execv(args[0], (char* const*) args);
1826 log_error("Failed to execute /bin/sh, giving up: %m");
1828 log_warning("Failed to execute /sbin/init, giving up: %m");
1832 fclose(serialization);
1837 if (shutdown_verb) {
1838 const char * command_line[] = {
1839 SYSTEMD_SHUTDOWN_BINARY_PATH,
1845 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1848 /* If we reboot let's set the shutdown
1849 * watchdog and tell the shutdown binary to
1850 * repeatedly ping it */
1851 watchdog_set_timeout(&arg_shutdown_watchdog);
1852 watchdog_close(false);
1854 /* Tell the binary how often to ping */
1855 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1858 env_block = strv_append(environ, e);
1860 env_block = strv_copy(environ);
1861 watchdog_close(true);
1864 /* Avoid the creation of new processes forked by the
1865 * kernel; at this point, we will not listen to the
1867 if (detect_container(NULL) <= 0)
1868 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1870 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1872 log_error("Failed to execute shutdown binary, freezing: %m");