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/>.
26 #include <sys/types.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
39 #include "sd-daemon.h"
40 #include "sd-messages.h"
44 #include "load-fragment.h"
47 #include "conf-parser.h"
55 #include "path-util.h"
56 #include "switch-root.h"
57 #include "capability.h"
62 #include "dbus-manager.h"
63 #include "bus-error.h"
66 #include "mount-setup.h"
67 #include "loopback-setup.h"
68 #include "hostname-setup.h"
69 #include "machine-id-setup.h"
70 #include "selinux-setup.h"
71 #include "ima-setup.h"
72 #include "smack-setup.h"
74 #include "kmod-setup.h"
82 ACTION_DUMP_CONFIGURATION_ITEMS,
84 } arg_action = ACTION_RUN;
86 static char *arg_default_unit = NULL;
87 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
89 static bool arg_dump_core = true;
90 static bool arg_crash_shell = false;
91 static int arg_crash_chvt = -1;
92 static bool arg_confirm_spawn = false;
93 static ShowStatus arg_show_status = SHOW_STATUS_UNSET;
94 static bool arg_switched_root = false;
95 static char ***arg_join_controllers = NULL;
96 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
97 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
98 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
99 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
100 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
101 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
102 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
103 static usec_t arg_runtime_watchdog = 0;
104 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
105 static char **arg_default_environment = NULL;
106 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
107 static uint64_t arg_capability_bounding_set_drop = 0;
108 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
110 static FILE* serialization = NULL;
112 static void nop_handler(int sig) {
115 noreturn static void crash(int sig) {
118 /* Pass this on immediately, if this is not PID 1 */
120 else if (!arg_dump_core)
121 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
123 struct sigaction sa = {
124 .sa_handler = nop_handler,
125 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
129 /* We want to wait for the core process, hence let's enable SIGCHLD */
130 sigaction(SIGCHLD, &sa, NULL);
134 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
137 struct rlimit rl = {};
139 /* Enable default signal handler for core dump */
141 sa.sa_handler = SIG_DFL;
142 sigaction(sig, &sa, NULL);
144 /* Don't limit the core dump size */
145 rl.rlim_cur = RLIM_INFINITY;
146 rl.rlim_max = RLIM_INFINITY;
147 setrlimit(RLIMIT_CORE, &rl);
149 /* Just to be sure... */
152 /* Raise the signal again */
155 assert_not_reached("We shouldn't be here...");
162 /* Order things nicely. */
163 r = wait_for_terminate(pid, &status);
165 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
166 else if (status.si_code != CLD_DUMPED)
167 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
169 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
174 chvt(arg_crash_chvt);
176 if (arg_crash_shell) {
177 struct sigaction sa = {
178 .sa_handler = SIG_IGN,
179 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
183 log_info("Executing crash shell in 10s...");
186 /* Let the kernel reap children for us */
187 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
191 log_error("Failed to fork off crash shell: %m");
193 make_console_stdio();
194 execl("/bin/sh", "/bin/sh", NULL);
196 log_error("execl() failed: %m");
200 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
203 log_info("Freezing execution.");
207 static void install_crash_handler(void) {
208 struct sigaction sa = {
210 .sa_flags = SA_NODEFER,
213 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
216 static int console_setup(bool do_reset) {
219 /* If we are init, we connect stdin/stdout/stderr to /dev/null
220 * and make sure we don't have a controlling tty. */
227 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
229 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
233 /* We don't want to force text mode.
234 * plymouth may be showing pictures already from initrd. */
235 r = reset_terminal_fd(tty_fd, false);
237 log_error("Failed to reset /dev/console: %s", strerror(-r));
239 close_nointr_nofail(tty_fd);
243 static int set_default_unit(const char *u) {
252 free(arg_default_unit);
253 arg_default_unit = c;
258 static int parse_proc_cmdline_word(const char *word) {
260 static const char * const rlmap[] = {
261 "emergency", SPECIAL_EMERGENCY_TARGET,
262 "-b", SPECIAL_EMERGENCY_TARGET,
263 "single", SPECIAL_RESCUE_TARGET,
264 "-s", SPECIAL_RESCUE_TARGET,
265 "s", SPECIAL_RESCUE_TARGET,
266 "S", SPECIAL_RESCUE_TARGET,
267 "1", SPECIAL_RESCUE_TARGET,
268 "2", SPECIAL_RUNLEVEL2_TARGET,
269 "3", SPECIAL_RUNLEVEL3_TARGET,
270 "4", SPECIAL_RUNLEVEL4_TARGET,
271 "5", SPECIAL_RUNLEVEL5_TARGET,
276 if (startswith(word, "systemd.unit=")) {
279 return set_default_unit(word + 13);
281 } else if (startswith(word, "rd.systemd.unit=")) {
284 return set_default_unit(word + 16);
286 } else if (startswith(word, "systemd.log_target=")) {
288 if (log_set_target_from_string(word + 19) < 0)
289 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
291 } else if (startswith(word, "systemd.log_level=")) {
293 if (log_set_max_level_from_string(word + 18) < 0)
294 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
296 } else if (startswith(word, "systemd.log_color=")) {
298 if (log_show_color_from_string(word + 18) < 0)
299 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
301 } else if (startswith(word, "systemd.log_location=")) {
303 if (log_show_location_from_string(word + 21) < 0)
304 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
306 } else if (startswith(word, "systemd.dump_core=")) {
309 if ((r = parse_boolean(word + 18)) < 0)
310 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
314 } else if (startswith(word, "systemd.crash_shell=")) {
317 if ((r = parse_boolean(word + 20)) < 0)
318 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
322 } else if (startswith(word, "systemd.confirm_spawn=")) {
325 if ((r = parse_boolean(word + 22)) < 0)
326 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
328 arg_confirm_spawn = r;
330 } else if (startswith(word, "systemd.crash_chvt=")) {
333 if (safe_atoi(word + 19, &k) < 0)
334 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
338 } else if (startswith(word, "systemd.show_status=")) {
341 r = parse_show_status(word + 20, &arg_show_status);
343 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
344 } else if (startswith(word, "systemd.default_standard_output=")) {
347 if ((r = exec_output_from_string(word + 32)) < 0)
348 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
350 arg_default_std_output = r;
351 } else if (startswith(word, "systemd.default_standard_error=")) {
354 if ((r = exec_output_from_string(word + 31)) < 0)
355 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
357 arg_default_std_error = r;
358 } else if (startswith(word, "systemd.setenv=")) {
359 _cleanup_free_ char *cenv = NULL;
361 cenv = strdup(word + 15);
365 if (env_assignment_is_valid(cenv)) {
368 env = strv_env_set(arg_default_environment, cenv);
370 arg_default_environment = env;
372 log_warning("Setting environment variable '%s' failed, ignoring: %m", cenv);
374 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
376 } else if (startswith(word, "systemd.") ||
377 (in_initrd() && startswith(word, "rd.systemd."))) {
381 /* Ignore systemd.journald.xyz and friends */
383 if (startswith(c, "rd."))
385 if (startswith(c, "systemd."))
387 if (c[strcspn(c, ".=")] != '.') {
389 log_warning("Unknown kernel switch %s. Ignoring.", word);
391 log_info("Supported kernel switches:\n"
392 "systemd.unit=UNIT Default unit to start\n"
393 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
394 "systemd.dump_core=0|1 Dump core on crash\n"
395 "systemd.crash_shell=0|1 Run shell on crash\n"
396 "systemd.crash_chvt=N Change to VT #N on crash\n"
397 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
398 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
399 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
401 "systemd.log_level=LEVEL Log level\n"
402 "systemd.log_color=0|1 Highlight important log messages\n"
403 "systemd.log_location=0|1 Include code location in log messages\n"
404 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
405 " Set default log output for services\n"
406 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
407 " Set default log error output for services\n"
408 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
411 } else if (streq(word, "quiet")) {
412 if (arg_show_status == SHOW_STATUS_UNSET)
413 arg_show_status = SHOW_STATUS_AUTO;
414 } else if (streq(word, "debug")) {
415 /* Log to kmsg, the journal socket will fill up before the
416 * journal is started and tools running during that time
417 * will block with every log message for for 60 seconds,
418 * before they give up. */
419 log_set_max_level(LOG_DEBUG);
420 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_KMSG);
421 } else if (!in_initrd()) {
424 /* SysV compatibility */
425 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
426 if (streq(word, rlmap[i]))
427 return set_default_unit(rlmap[i+1]);
433 #define DEFINE_SETTER(name, func, descr) \
434 static int name(const char *unit, \
435 const char *filename, \
437 const char *section, \
438 unsigned section_line, \
439 const char *lvalue, \
441 const char *rvalue, \
453 log_syntax(unit, LOG_ERR, filename, line, -r, \
454 "Invalid " descr "'%s': %s", \
455 rvalue, strerror(-r)); \
460 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
461 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
462 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
463 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
465 static int config_parse_cpu_affinity2(const char *unit,
466 const char *filename,
469 unsigned section_line,
486 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
491 if (!(t = strndup(w, l)))
494 r = safe_atou(t, &cpu);
498 if (!(c = cpu_set_malloc(&ncpus)))
501 if (r < 0 || cpu >= ncpus) {
502 log_syntax(unit, LOG_ERR, filename, line, -r,
503 "Failed to parse CPU affinity '%s'", rvalue);
508 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
512 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
513 log_warning_unit(unit, "Failed to set CPU affinity: %m");
521 static void strv_free_free(char ***l) {
533 static void free_join_controllers(void) {
534 strv_free_free(arg_join_controllers);
535 arg_join_controllers = NULL;
538 static int config_parse_join_controllers(const char *unit,
539 const char *filename,
542 unsigned section_line,
557 free_join_controllers();
559 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
562 s = strndup(w, length);
566 l = strv_split(s, ",");
571 if (strv_length(l) <= 1) {
576 if (!arg_join_controllers) {
577 arg_join_controllers = new(char**, 2);
578 if (!arg_join_controllers) {
583 arg_join_controllers[0] = l;
584 arg_join_controllers[1] = NULL;
591 t = new0(char**, n+2);
599 for (a = arg_join_controllers; *a; a++) {
601 if (strv_overlap(*a, l)) {
602 if (strv_extend_strv(&l, *a) < 0) {
622 t[n++] = strv_uniq(l);
624 strv_free_free(arg_join_controllers);
625 arg_join_controllers = t;
632 static int parse_config_file(void) {
634 const ConfigTableItem items[] = {
635 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
636 { "Manager", "LogTarget", config_parse_target, 0, NULL },
637 { "Manager", "LogColor", config_parse_color, 0, NULL },
638 { "Manager", "LogLocation", config_parse_location, 0, NULL },
639 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
640 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
641 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
642 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
643 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
644 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
645 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
646 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
647 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
648 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
649 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
650 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
651 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
652 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
653 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
654 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
655 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
656 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
657 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
658 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
659 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
660 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
661 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
662 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
663 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
664 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
665 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
666 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
667 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
668 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
669 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
670 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
671 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
672 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
673 { NULL, NULL, NULL, 0, NULL }
676 _cleanup_fclose_ FILE *f;
680 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
686 log_warning("Failed to open configuration file '%s': %m", fn);
690 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
692 log_warning("Failed to parse configuration file: %s", strerror(-r));
697 static int parse_proc_cmdline(void) {
698 _cleanup_free_ char *line = NULL;
703 r = proc_cmdline(&line);
705 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
709 FOREACH_WORD_QUOTED(w, l, line, state) {
710 _cleanup_free_ char *word;
712 word = strndup(w, l);
716 r = parse_proc_cmdline_word(word);
718 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
726 static int parse_argv(int argc, char *argv[]) {
729 ARG_LOG_LEVEL = 0x100,
738 ARG_DUMP_CONFIGURATION_ITEMS,
745 ARG_DEFAULT_STD_OUTPUT,
746 ARG_DEFAULT_STD_ERROR
749 static const struct option options[] = {
750 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
751 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
752 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
753 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
754 { "unit", required_argument, NULL, ARG_UNIT },
755 { "system", no_argument, NULL, ARG_SYSTEM },
756 { "user", no_argument, NULL, ARG_USER },
757 { "test", no_argument, NULL, ARG_TEST },
758 { "help", no_argument, NULL, 'h' },
759 { "version", no_argument, NULL, ARG_VERSION },
760 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
761 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
762 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
763 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
764 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
765 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
766 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
767 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
768 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
780 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
785 if ((r = log_set_max_level_from_string(optarg)) < 0) {
786 log_error("Failed to parse log level %s.", optarg);
794 if ((r = log_set_target_from_string(optarg)) < 0) {
795 log_error("Failed to parse log target %s.", optarg);
804 if ((r = log_show_color_from_string(optarg)) < 0) {
805 log_error("Failed to parse log color setting %s.", optarg);
809 log_show_color(true);
813 case ARG_LOG_LOCATION:
816 if ((r = log_show_location_from_string(optarg)) < 0) {
817 log_error("Failed to parse log location setting %s.", optarg);
821 log_show_location(true);
825 case ARG_DEFAULT_STD_OUTPUT:
827 if ((r = exec_output_from_string(optarg)) < 0) {
828 log_error("Failed to parse default standard output setting %s.", optarg);
831 arg_default_std_output = r;
834 case ARG_DEFAULT_STD_ERROR:
836 if ((r = exec_output_from_string(optarg)) < 0) {
837 log_error("Failed to parse default standard error output setting %s.", optarg);
840 arg_default_std_error = r;
845 if ((r = set_default_unit(optarg)) < 0) {
846 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
853 arg_running_as = SYSTEMD_SYSTEM;
857 arg_running_as = SYSTEMD_USER;
861 arg_action = ACTION_TEST;
865 arg_action = ACTION_VERSION;
868 case ARG_DUMP_CONFIGURATION_ITEMS:
869 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
873 r = optarg ? parse_boolean(optarg) : 1;
875 log_error("Failed to parse dump core boolean %s.", optarg);
881 case ARG_CRASH_SHELL:
882 r = optarg ? parse_boolean(optarg) : 1;
884 log_error("Failed to parse crash shell boolean %s.", optarg);
890 case ARG_CONFIRM_SPAWN:
891 r = optarg ? parse_boolean(optarg) : 1;
893 log_error("Failed to parse confirm spawn boolean %s.", optarg);
896 arg_confirm_spawn = r;
899 case ARG_SHOW_STATUS:
901 r = parse_show_status(optarg, &arg_show_status);
903 log_error("Failed to parse show status boolean %s.", optarg);
907 arg_show_status = SHOW_STATUS_YES;
910 case ARG_DESERIALIZE: {
914 r = safe_atoi(optarg, &fd);
915 if (r < 0 || fd < 0) {
916 log_error("Failed to parse deserialize option %s.", optarg);
917 return r < 0 ? r : -EINVAL;
920 fd_cloexec(fd, true);
924 log_error("Failed to open serialization fd: %m");
929 fclose(serialization);
936 case ARG_SWITCHED_ROOT:
937 arg_switched_root = true;
941 arg_action = ACTION_HELP;
945 log_set_max_level(LOG_DEBUG);
951 /* Just to eat away the sysvinit kernel
952 * cmdline args without getopt() error
953 * messages that we'll parse in
954 * parse_proc_cmdline_word() or ignore. */
959 log_error("Unknown option code %c", c);
966 if (optind < argc && getpid() != 1) {
967 /* Hmm, when we aren't run as init system
968 * let's complain about excess arguments */
970 log_error("Excess arguments.");
974 if (detect_container(NULL) > 0) {
977 /* All /proc/cmdline arguments the kernel didn't
978 * understand it passed to us. We're not really
979 * interested in that usually since /proc/cmdline is
980 * more interesting and complete. With one exception:
981 * if we are run in a container /proc/cmdline is not
982 * relevant for the container, hence we rely on argv[]
985 for (a = argv; a < argv + argc; a++) {
986 r = parse_proc_cmdline_word(*a);
988 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
997 static int help(void) {
999 printf("%s [OPTIONS...]\n\n"
1000 "Starts up and maintains the system or user services.\n\n"
1001 " -h --help Show this help\n"
1002 " --test Determine startup sequence, dump it and exit\n"
1003 " --dump-configuration-items Dump understood unit configuration items\n"
1004 " --unit=UNIT Set default unit\n"
1005 " --system Run a system instance, even if PID != 1\n"
1006 " --user Run a user instance\n"
1007 " --dump-core[=0|1] Dump core on crash\n"
1008 " --crash-shell[=0|1] Run shell on crash\n"
1009 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1010 " --show-status[=0|1] Show status updates on the console during bootup\n"
1011 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1012 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1013 " --log-color[=0|1] Highlight important log messages\n"
1014 " --log-location[=0|1] Include code location in log messages\n"
1015 " --default-standard-output= Set default standard output for services\n"
1016 " --default-standard-error= Set default standard error output for services\n",
1017 program_invocation_short_name);
1022 static int version(void) {
1023 puts(PACKAGE_STRING);
1024 puts(SYSTEMD_FEATURES);
1029 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1038 r = manager_open_serialization(m, &f);
1040 log_error("Failed to create serialization file: %s", strerror(-r));
1044 /* Make sure nothing is really destructed when we shut down */
1046 bus_manager_send_reloading(m, true);
1051 log_error("Failed to allocate fd set: %s", strerror(-r));
1055 r = manager_serialize(m, f, fds, switching_root);
1057 log_error("Failed to serialize state: %s", strerror(-r));
1061 if (fseeko(f, 0, SEEK_SET) < 0) {
1062 log_error("Failed to rewind serialization fd: %m");
1066 r = fd_cloexec(fileno(f), false);
1068 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1072 r = fdset_cloexec(fds, false);
1074 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1092 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1096 assert(saved_rlimit);
1098 /* Save the original RLIMIT_NOFILE so that we can reset it
1099 * later when transitioning from the initrd to the main
1100 * systemd or suchlike. */
1101 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1102 log_error("Reading RLIMIT_NOFILE failed: %m");
1106 /* Make sure forked processes get the default kernel setting */
1107 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1110 rl = newdup(struct rlimit, saved_rlimit, 1);
1114 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1117 /* Bump up the resource limit for ourselves substantially */
1118 nl.rlim_cur = nl.rlim_max = 64*1024;
1119 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1121 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1128 static void test_mtab(void) {
1131 /* Check that /etc/mtab is a symlink */
1133 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1136 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1143 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1144 "This is not supported anymore. "
1145 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1148 static void test_usr(void) {
1150 /* Check that /usr is not a separate fs */
1152 if (dir_is_empty("/usr") <= 0)
1155 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1156 "Some things will probably break (sometimes even silently) in mysterious ways. "
1157 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1160 static void test_cgroups(void) {
1162 if (access("/proc/cgroups", F_OK) >= 0)
1165 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1166 "Systems without control groups are not supported. "
1167 "We will now sleep for 10s, and then continue boot-up. "
1168 "Expect breakage and please do not file bugs. "
1169 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1170 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1175 static int initialize_join_controllers(void) {
1176 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1177 * + "net_prio". We'd like to add "cpuset" to the mix, but
1178 * "cpuset" does't really work for groups with no initialized
1181 arg_join_controllers = new(char**, 3);
1182 if (!arg_join_controllers)
1185 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1186 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1187 arg_join_controllers[2] = NULL;
1189 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1190 free_join_controllers();
1197 int main(int argc, char *argv[]) {
1199 int r, retval = EXIT_FAILURE;
1200 usec_t before_startup, after_startup;
1201 char timespan[FORMAT_TIMESPAN_MAX];
1203 bool reexecute = false;
1204 const char *shutdown_verb = NULL;
1205 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1206 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1207 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1208 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1209 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1210 static char systemd[] = "systemd";
1211 bool skip_setup = false;
1213 bool loaded_policy = false;
1214 bool arm_reboot_watchdog = false;
1215 bool queue_default_job = false;
1216 char *switch_root_dir = NULL, *switch_root_init = NULL;
1217 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1219 #ifdef HAVE_SYSV_COMPAT
1220 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1221 /* This is compatibility support for SysV, where
1222 * calling init as a user is identical to telinit. */
1225 execv(SYSTEMCTL_BINARY_PATH, argv);
1226 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1231 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1232 dual_timestamp_get(&userspace_timestamp);
1234 /* Determine if this is a reexecution or normal bootup. We do
1235 * the full command line parsing much later, so let's just
1236 * have a quick peek here. */
1237 if (strv_find(argv+1, "--deserialize"))
1240 /* If we have switched root, do all the special setup
1242 if (strv_find(argv+1, "--switched-root"))
1245 /* If we get started via the /sbin/init symlink then we are
1246 called 'init'. After a subsequent reexecution we are then
1247 called 'systemd'. That is confusing, hence let's call us
1248 systemd right-away. */
1249 program_invocation_short_name = systemd;
1250 prctl(PR_SET_NAME, systemd);
1255 log_show_color(isatty(STDERR_FILENO) > 0);
1257 /* Disable the umask logic */
1261 if (getpid() == 1 && detect_container(NULL) <= 0) {
1263 /* Running outside of a container as PID 1 */
1264 arg_running_as = SYSTEMD_SYSTEM;
1266 log_set_target(LOG_TARGET_KMSG);
1270 initrd_timestamp = userspace_timestamp;
1273 mount_setup_early();
1274 dual_timestamp_get(&security_start_timestamp);
1275 if (selinux_setup(&loaded_policy) < 0)
1277 if (ima_setup() < 0)
1279 if (smack_setup() < 0)
1281 dual_timestamp_get(&security_finish_timestamp);
1284 if (label_init(NULL) < 0)
1288 if (hwclock_is_localtime() > 0) {
1291 /* The first-time call to settimeofday() does a time warp in the kernel */
1292 r = hwclock_set_timezone(&min);
1294 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1296 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1297 } else if (!in_initrd()) {
1299 * Do dummy first-time call to seal the kernel's time warp magic
1301 * Do not call this this from inside the initrd. The initrd might not
1302 * carry /etc/adjtime with LOCAL, but the real system could be set up
1303 * that way. In such case, we need to delay the time-warp or the sealing
1304 * until we reach the real system.
1306 hwclock_reset_timezone();
1308 /* Tell the kernel our timezone */
1309 r = hwclock_set_timezone(NULL);
1311 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1315 /* Set the default for later on, but don't actually
1316 * open the logs like this for now. Note that if we
1317 * are transitioning from the initrd there might still
1318 * be journal fd open, and we shouldn't attempt
1319 * opening that before we parsed /proc/cmdline which
1320 * might redirect output elsewhere. */
1321 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1323 } else if (getpid() == 1) {
1324 /* Running inside a container, as PID 1 */
1325 arg_running_as = SYSTEMD_SYSTEM;
1326 log_set_target(LOG_TARGET_CONSOLE);
1327 log_close_console(); /* force reopen of /dev/console */
1330 /* For the later on, see above... */
1331 log_set_target(LOG_TARGET_JOURNAL);
1333 /* clear the kernel timestamp,
1334 * because we are in a container */
1335 kernel_timestamp.monotonic = 0ULL;
1336 kernel_timestamp.realtime = 0ULL;
1339 /* Running as user instance */
1340 arg_running_as = SYSTEMD_USER;
1341 log_set_target(LOG_TARGET_AUTO);
1344 /* clear the kernel timestamp,
1345 * because we are not PID 1 */
1346 kernel_timestamp.monotonic = 0ULL;
1347 kernel_timestamp.realtime = 0ULL;
1350 /* Initialize default unit */
1351 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1353 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1357 r = initialize_join_controllers();
1361 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1362 * /proc/$PID/fd is available. */
1363 if (getpid() == 1) {
1364 r = mount_setup(loaded_policy);
1369 /* Reset all signal handlers. */
1370 assert_se(reset_all_signal_handlers() == 0);
1372 ignore_signals(SIGNALS_IGNORE, -1);
1374 if (parse_config_file() < 0)
1377 if (arg_running_as == SYSTEMD_SYSTEM)
1378 if (parse_proc_cmdline() < 0)
1381 log_parse_environment();
1383 if (parse_argv(argc, argv) < 0)
1386 if (arg_action == ACTION_TEST &&
1388 log_error("Don't run test mode as root.");
1392 if (arg_running_as == SYSTEMD_USER &&
1393 arg_action == ACTION_RUN &&
1395 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1399 if (arg_running_as == SYSTEMD_SYSTEM &&
1400 arg_action == ACTION_RUN &&
1401 running_in_chroot() > 0) {
1402 log_error("Cannot be run in a chroot() environment.");
1406 if (arg_action == ACTION_HELP) {
1409 } else if (arg_action == ACTION_VERSION) {
1412 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1413 unit_dump_config_items(stdout);
1414 retval = EXIT_SUCCESS;
1416 } else if (arg_action == ACTION_DONE) {
1417 retval = EXIT_SUCCESS;
1421 if (arg_running_as == SYSTEMD_USER &&
1422 !getenv("XDG_RUNTIME_DIR")) {
1423 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1427 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1429 /* Close logging fds, in order not to confuse fdset below */
1432 /* Remember open file descriptors for later deserialization */
1433 r = fdset_new_fill(&fds);
1435 log_error("Failed to allocate fd set: %s", strerror(-r));
1438 fdset_cloexec(fds, true);
1441 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1443 if (arg_running_as == SYSTEMD_SYSTEM)
1444 /* Become a session leader if we aren't one yet. */
1447 /* Move out of the way, so that we won't block unmounts */
1448 assert_se(chdir("/") == 0);
1450 /* Reset the console, but only if this is really init and we
1451 * are freshly booted */
1452 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1453 console_setup(getpid() == 1 && !skip_setup);
1455 /* Open the logging devices, if possible and necessary */
1458 /* Make sure we leave a core dump without panicing the
1460 if (getpid() == 1) {
1461 install_crash_handler();
1463 r = mount_cgroup_controllers(arg_join_controllers);
1468 if (arg_running_as == SYSTEMD_SYSTEM) {
1469 const char *virtualization = NULL;
1471 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1473 detect_virtualization(&virtualization);
1475 log_info("Detected virtualization '%s'.", virtualization);
1478 log_info("Running in initial RAM disk.");
1481 _cleanup_free_ char *t = uid_to_name(getuid());
1482 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1486 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1487 if (arg_show_status > 0 || plymouth_running())
1491 if (detect_container(NULL) <= 0)
1503 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1504 watchdog_set_timeout(&arg_runtime_watchdog);
1506 if (arg_timer_slack_nsec != (nsec_t) -1)
1507 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1508 log_error("Failed to adjust timer slack: %m");
1510 if (arg_capability_bounding_set_drop) {
1511 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1513 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1516 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1518 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1523 if (arg_running_as == SYSTEMD_USER) {
1524 /* Become reaper of our children */
1525 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1526 log_warning("Failed to make us a subreaper: %m");
1527 if (errno == EINVAL)
1528 log_info("Perhaps the kernel version is too old (< 3.4?)");
1532 if (arg_running_as == SYSTEMD_SYSTEM)
1533 bump_rlimit_nofile(&saved_rlimit_nofile);
1535 r = manager_new(arg_running_as, &m);
1537 log_error("Failed to allocate manager object: %s", strerror(-r));
1541 m->confirm_spawn = arg_confirm_spawn;
1542 m->default_std_output = arg_default_std_output;
1543 m->default_std_error = arg_default_std_error;
1544 m->default_restart_usec = arg_default_restart_usec;
1545 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1546 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1547 m->default_start_limit_interval = arg_default_start_limit_interval;
1548 m->default_start_limit_burst = arg_default_start_limit_burst;
1549 m->runtime_watchdog = arg_runtime_watchdog;
1550 m->shutdown_watchdog = arg_shutdown_watchdog;
1551 m->userspace_timestamp = userspace_timestamp;
1552 m->kernel_timestamp = kernel_timestamp;
1553 m->initrd_timestamp = initrd_timestamp;
1554 m->security_start_timestamp = security_start_timestamp;
1555 m->security_finish_timestamp = security_finish_timestamp;
1557 manager_set_default_rlimits(m, arg_default_rlimit);
1559 if (arg_default_environment)
1560 manager_environment_add(m, NULL, arg_default_environment);
1562 if (arg_show_status == SHOW_STATUS_UNSET)
1563 arg_show_status = SHOW_STATUS_YES;
1564 manager_set_show_status(m, arg_show_status);
1566 /* Remember whether we should queue the default job */
1567 queue_default_job = !serialization || arg_switched_root;
1569 before_startup = now(CLOCK_MONOTONIC);
1571 r = manager_startup(m, serialization, fds);
1573 log_error("Failed to fully start up daemon: %s", strerror(-r));
1575 /* This will close all file descriptors that were opened, but
1576 * not claimed by any unit. */
1580 if (serialization) {
1581 fclose(serialization);
1582 serialization = NULL;
1585 if (queue_default_job) {
1586 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1587 Unit *target = NULL;
1588 Job *default_unit_job;
1590 log_debug("Activating default unit: %s", arg_default_unit);
1592 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1594 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1595 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1596 log_error("Failed to load default target: %s", strerror(-target->load_error));
1597 else if (target->load_state == UNIT_MASKED)
1598 log_error("Default target masked.");
1600 if (!target || target->load_state != UNIT_LOADED) {
1601 log_info("Trying to load rescue target...");
1603 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1605 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1607 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1608 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1610 } else if (target->load_state == UNIT_MASKED) {
1611 log_error("Rescue target masked.");
1616 assert(target->load_state == UNIT_LOADED);
1618 if (arg_action == ACTION_TEST) {
1619 printf("-> By units:\n");
1620 manager_dump_units(m, stdout, "\t");
1623 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1625 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1627 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1629 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1633 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1637 m->default_unit_job_id = default_unit_job->id;
1639 after_startup = now(CLOCK_MONOTONIC);
1640 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1641 "Loaded units and determined initial transaction in %s.",
1642 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1644 if (arg_action == ACTION_TEST) {
1645 printf("-> By jobs:\n");
1646 manager_dump_jobs(m, stdout, "\t");
1647 retval = EXIT_SUCCESS;
1653 r = manager_loop(m);
1655 log_error("Failed to run mainloop: %s", strerror(-r));
1659 switch (m->exit_code) {
1662 retval = EXIT_SUCCESS;
1666 case MANAGER_RELOAD:
1667 log_info("Reloading.");
1668 r = manager_reload(m);
1670 log_error("Failed to reload: %s", strerror(-r));
1673 case MANAGER_REEXECUTE:
1675 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1679 log_notice("Reexecuting.");
1682 case MANAGER_SWITCH_ROOT:
1683 /* Steal the switch root parameters */
1684 switch_root_dir = m->switch_root;
1685 switch_root_init = m->switch_root_init;
1686 m->switch_root = m->switch_root_init = NULL;
1688 if (!switch_root_init)
1689 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1693 log_notice("Switching root.");
1696 case MANAGER_REBOOT:
1697 case MANAGER_POWEROFF:
1699 case MANAGER_KEXEC: {
1700 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1701 [MANAGER_REBOOT] = "reboot",
1702 [MANAGER_POWEROFF] = "poweroff",
1703 [MANAGER_HALT] = "halt",
1704 [MANAGER_KEXEC] = "kexec"
1707 assert_se(shutdown_verb = table[m->exit_code]);
1708 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1710 log_notice("Shutting down.");
1715 assert_not_reached("Unknown exit code.");
1723 for (j = 0; j < RLIMIT_NLIMITS; j++)
1724 free(arg_default_rlimit[j]);
1726 free(arg_default_unit);
1727 free_join_controllers();
1733 unsigned i, args_size;
1735 /* Close and disarm the watchdog, so that the new
1736 * instance can reinitialize it, but doesn't get
1737 * rebooted while we do that */
1738 watchdog_close(true);
1740 /* Reset the RLIMIT_NOFILE to the kernel default, so
1741 * that the new systemd can pass the kernel default to
1742 * its child processes */
1743 if (saved_rlimit_nofile.rlim_cur > 0)
1744 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1746 if (switch_root_dir) {
1747 /* Kill all remaining processes from the
1748 * initrd, but don't wait for them, so that we
1749 * can handle the SIGCHLD for them after
1751 broadcast_signal(SIGTERM, false, true);
1753 /* And switch root */
1754 r = switch_root(switch_root_dir);
1756 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1759 args_size = MAX(6, argc+1);
1760 args = newa(const char*, args_size);
1762 if (!switch_root_init) {
1765 /* First try to spawn ourselves with the right
1766 * path, and with full serialization. We do
1767 * this only if the user didn't specify an
1768 * explicit init to spawn. */
1770 assert(serialization);
1773 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1777 args[i++] = SYSTEMD_BINARY_PATH;
1778 if (switch_root_dir)
1779 args[i++] = "--switched-root";
1780 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1781 args[i++] = "--deserialize";
1785 /* do not pass along the environment we inherit from the kernel or initrd */
1786 if (switch_root_dir)
1789 assert(i <= args_size);
1790 execv(args[0], (char* const*) args);
1793 /* Try the fallback, if there is any, without any
1794 * serialization. We pass the original argv[] and
1795 * envp[]. (Well, modulo the ordering changes due to
1796 * getopt() in argv[], and some cleanups in envp[],
1797 * but let's hope that doesn't matter.) */
1799 if (serialization) {
1800 fclose(serialization);
1801 serialization = NULL;
1809 /* Reopen the console */
1810 make_console_stdio();
1812 for (j = 1, i = 1; j < argc; j++)
1813 args[i++] = argv[j];
1815 assert(i <= args_size);
1817 if (switch_root_init) {
1818 args[0] = switch_root_init;
1819 execv(args[0], (char* const*) args);
1820 log_warning("Failed to execute configured init, trying fallback: %m");
1823 args[0] = "/sbin/init";
1824 execv(args[0], (char* const*) args);
1826 if (errno == ENOENT) {
1827 log_warning("No /sbin/init, trying fallback");
1829 args[0] = "/bin/sh";
1831 execv(args[0], (char* const*) args);
1832 log_error("Failed to execute /bin/sh, giving up: %m");
1834 log_warning("Failed to execute /sbin/init, giving up: %m");
1838 fclose(serialization);
1843 #ifdef HAVE_VALGRIND_VALGRIND_H
1844 /* If we are PID 1 and running under valgrind, then let's exit
1845 * here explicitly. valgrind will only generate nice output on
1846 * exit(), not on exec(), hence let's do the former not the
1848 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1852 if (shutdown_verb) {
1853 const char * command_line[] = {
1854 SYSTEMD_SHUTDOWN_BINARY_PATH,
1858 _cleanup_strv_free_ char **env_block = NULL;
1859 env_block = strv_copy(environ);
1861 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1864 /* If we reboot let's set the shutdown
1865 * watchdog and tell the shutdown binary to
1866 * repeatedly ping it */
1867 watchdog_set_timeout(&arg_shutdown_watchdog);
1868 watchdog_close(false);
1870 /* Tell the binary how often to ping, ignore failure */
1871 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
1872 strv_push(&env_block, e);
1874 watchdog_close(true);
1876 /* Avoid the creation of new processes forked by the
1877 * kernel; at this point, we will not listen to the
1879 if (detect_container(NULL) <= 0)
1880 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1882 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1883 log_error("Failed to execute shutdown binary, freezing: %m");