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>
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
47 #include "load-fragment.h"
50 #include "conf-parser.h"
58 #include "architecture.h"
60 #include "path-util.h"
61 #include "switch-root.h"
62 #include "capability.h"
65 #include "clock-util.h"
67 #include "dbus-manager.h"
68 #include "bus-error.h"
71 #include "mount-setup.h"
72 #include "loopback-setup.h"
73 #include "hostname-setup.h"
74 #include "machine-id-setup.h"
75 #include "selinux-setup.h"
76 #include "ima-setup.h"
77 #include "smack-setup.h"
79 #include "kmod-setup.h"
87 ACTION_DUMP_CONFIGURATION_ITEMS,
89 } arg_action = ACTION_RUN;
90 static char *arg_default_unit = NULL;
91 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
92 static bool arg_dump_core = true;
93 static bool arg_crash_shell = false;
94 static int arg_crash_chvt = -1;
95 static bool arg_confirm_spawn = false;
96 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
97 static bool arg_switched_root = false;
98 static int arg_no_pager = -1;
99 static char ***arg_join_controllers = NULL;
100 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
101 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
102 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
103 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
104 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
105 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
106 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
107 static usec_t arg_runtime_watchdog = 0;
108 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
109 static char **arg_default_environment = NULL;
110 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
111 static uint64_t arg_capability_bounding_set_drop = 0;
112 static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
113 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
114 static Set* arg_syscall_archs = NULL;
115 static FILE* arg_serialization = NULL;
116 static bool arg_default_cpu_accounting = false;
117 static bool arg_default_blockio_accounting = false;
118 static bool arg_default_memory_accounting = false;
119 static usec_t arg_start_timeout_usec = DEFAULT_MANAGER_START_TIMEOUT_USEC;
120 static FailureAction arg_start_timeout_action = FAILURE_ACTION_POWEROFF_FORCE;
121 static char *arg_start_timeout_reboot_arg = NULL;
123 static void nop_handler(int sig) {}
125 static void pager_open_if_enabled(void) {
127 if (arg_no_pager <= 0)
133 noreturn static void crash(int sig) {
136 /* Pass this on immediately, if this is not PID 1 */
138 else if (!arg_dump_core)
139 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
141 struct sigaction sa = {
142 .sa_handler = nop_handler,
143 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
147 /* We want to wait for the core process, hence let's enable SIGCHLD */
148 sigaction(SIGCHLD, &sa, NULL);
152 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
155 struct rlimit rl = {};
157 /* Enable default signal handler for core dump */
159 sa.sa_handler = SIG_DFL;
160 sigaction(sig, &sa, NULL);
162 /* Don't limit the core dump size */
163 rl.rlim_cur = RLIM_INFINITY;
164 rl.rlim_max = RLIM_INFINITY;
165 setrlimit(RLIMIT_CORE, &rl);
167 /* Just to be sure... */
170 /* Raise the signal again */
173 assert_not_reached("We shouldn't be here...");
180 /* Order things nicely. */
181 r = wait_for_terminate(pid, &status);
183 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
184 else if (status.si_code != CLD_DUMPED)
185 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
187 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
192 chvt(arg_crash_chvt);
194 if (arg_crash_shell) {
195 struct sigaction sa = {
196 .sa_handler = SIG_IGN,
197 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
201 log_info("Executing crash shell in 10s...");
204 /* Let the kernel reap children for us */
205 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
209 log_error("Failed to fork off crash shell: %m");
211 make_console_stdio();
212 execl("/bin/sh", "/bin/sh", NULL);
214 log_error("execl() failed: %m");
218 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
221 log_info("Freezing execution.");
225 static void install_crash_handler(void) {
226 struct sigaction sa = {
228 .sa_flags = SA_NODEFER,
231 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
234 static int console_setup(void) {
235 _cleanup_close_ int tty_fd = -1;
238 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
240 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
244 /* We don't want to force text mode. plymouth may be showing
245 * pictures already from initrd. */
246 r = reset_terminal_fd(tty_fd, false);
248 log_error("Failed to reset /dev/console: %s", strerror(-r));
255 static int set_default_unit(const char *u) {
264 free(arg_default_unit);
265 arg_default_unit = c;
270 static int parse_proc_cmdline_item(const char *key, const char *value) {
272 static const char * const rlmap[] = {
273 "emergency", SPECIAL_EMERGENCY_TARGET,
274 "-b", SPECIAL_EMERGENCY_TARGET,
275 "single", SPECIAL_RESCUE_TARGET,
276 "-s", SPECIAL_RESCUE_TARGET,
277 "s", SPECIAL_RESCUE_TARGET,
278 "S", SPECIAL_RESCUE_TARGET,
279 "1", SPECIAL_RESCUE_TARGET,
280 "2", SPECIAL_RUNLEVEL2_TARGET,
281 "3", SPECIAL_RUNLEVEL3_TARGET,
282 "4", SPECIAL_RUNLEVEL4_TARGET,
283 "5", SPECIAL_RUNLEVEL5_TARGET,
289 if (streq(key, "systemd.unit") && value) {
292 return set_default_unit(value);
294 } else if (streq(key, "rd.systemd.unit") && value) {
297 return set_default_unit(value);
299 } else if (streq(key, "systemd.dump_core") && value) {
301 r = parse_boolean(value);
303 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
307 } else if (streq(key, "systemd.crash_shell") && value) {
309 r = parse_boolean(value);
311 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
315 } else if (streq(key, "systemd.crash_chvt") && value) {
317 if (safe_atoi(value, &r) < 0)
318 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
322 } else if (streq(key, "systemd.confirm_spawn") && value) {
324 r = parse_boolean(value);
326 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
328 arg_confirm_spawn = r;
330 } else if (streq(key, "systemd.show_status") && value) {
332 r = parse_show_status(value, &arg_show_status);
334 log_warning("Failed to parse show status switch %s. Ignoring.", value);
336 } else if (streq(key, "systemd.default_standard_output") && value) {
338 r = exec_output_from_string(value);
340 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
342 arg_default_std_output = r;
344 } else if (streq(key, "systemd.default_standard_error") && value) {
346 r = exec_output_from_string(value);
348 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
350 arg_default_std_error = r;
352 } else if (streq(key, "systemd.setenv") && value) {
354 if (env_assignment_is_valid(value)) {
357 env = strv_env_set(arg_default_environment, value);
359 arg_default_environment = env;
361 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
363 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
365 } else if (streq(key, "quiet") && !value) {
367 log_set_max_level(LOG_NOTICE);
369 if (arg_show_status == _SHOW_STATUS_UNSET)
370 arg_show_status = SHOW_STATUS_AUTO;
372 } else if (streq(key, "debug") && !value) {
374 /* Note that log_parse_environment() handles 'debug'
375 * too, and sets the log level to LOG_DEBUG. */
377 if (detect_container(NULL) > 0)
378 log_set_target(LOG_TARGET_CONSOLE);
380 } else if (!in_initrd() && !value) {
383 /* SysV compatibility */
384 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
385 if (streq(key, rlmap[i]))
386 return set_default_unit(rlmap[i+1]);
392 #define DEFINE_SETTER(name, func, descr) \
393 static int name(const char *unit, \
394 const char *filename, \
396 const char *section, \
397 unsigned section_line, \
398 const char *lvalue, \
400 const char *rvalue, \
412 log_syntax(unit, LOG_ERR, filename, line, -r, \
413 "Invalid " descr "'%s': %s", \
414 rvalue, strerror(-r)); \
419 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
420 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
421 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
422 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
424 static int config_parse_cpu_affinity2(
426 const char *filename,
429 unsigned section_line,
436 const char *word, *state;
445 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
450 if (!(t = strndup(word, l)))
453 r = safe_atou(t, &cpu);
457 if (!(c = cpu_set_malloc(&ncpus)))
460 if (r < 0 || cpu >= ncpus) {
461 log_syntax(unit, LOG_ERR, filename, line, -r,
462 "Failed to parse CPU affinity '%s'", rvalue);
467 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
470 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
471 "Trailing garbage, ignoring.");
474 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
475 log_warning_unit(unit, "Failed to set CPU affinity: %m");
483 static int config_parse_show_status(
485 const char *filename,
488 unsigned section_line,
496 ShowStatus *b = data;
503 k = parse_show_status(rvalue, b);
505 log_syntax(unit, LOG_ERR, filename, line, -k,
506 "Failed to parse show status setting, ignoring: %s", rvalue);
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,
534 unsigned section_line,
542 const char *word, *state;
549 free_join_controllers();
551 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
554 s = strndup(word, length);
558 l = strv_split(s, ",");
563 if (strv_length(l) <= 1) {
568 if (!arg_join_controllers) {
569 arg_join_controllers = new(char**, 2);
570 if (!arg_join_controllers) {
575 arg_join_controllers[0] = l;
576 arg_join_controllers[1] = NULL;
583 t = new0(char**, n+2);
591 for (a = arg_join_controllers; *a; a++) {
593 if (strv_overlap(*a, l)) {
594 if (strv_extend_strv(&l, *a) < 0) {
614 t[n++] = strv_uniq(l);
616 strv_free_free(arg_join_controllers);
617 arg_join_controllers = t;
621 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
622 "Trailing garbage, ignoring.");
627 static int parse_config_file(void) {
629 const ConfigTableItem items[] = {
630 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
631 { "Manager", "LogTarget", config_parse_target, 0, NULL },
632 { "Manager", "LogColor", config_parse_color, 0, NULL },
633 { "Manager", "LogLocation", config_parse_location, 0, NULL },
634 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
635 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
636 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
637 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
638 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
639 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
640 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
641 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
642 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
644 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
646 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
647 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
648 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
649 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
650 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
651 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
652 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
653 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
654 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
655 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
656 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
657 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
658 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
659 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
660 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
661 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
662 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
663 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
664 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
665 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
666 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
667 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
668 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
669 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
670 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
671 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
672 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
673 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
674 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
675 { "Manager", "StartTimeoutSec", config_parse_sec, 0, &arg_start_timeout_usec },
676 { "Manager", "StartTimeoutAction", config_parse_failure_action, 0, &arg_start_timeout_action },
677 { "Manager", "StartTimeoutRebootArgument",config_parse_string, 0, &arg_start_timeout_reboot_arg },
683 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
684 config_parse(NULL, fn, NULL,
686 config_item_table_lookup, items,
687 false, false, true, NULL);
692 static int parse_argv(int argc, char *argv[]) {
695 ARG_LOG_LEVEL = 0x100,
705 ARG_DUMP_CONFIGURATION_ITEMS,
712 ARG_DEFAULT_STD_OUTPUT,
713 ARG_DEFAULT_STD_ERROR
716 static const struct option options[] = {
717 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
718 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
719 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
720 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
721 { "unit", required_argument, NULL, ARG_UNIT },
722 { "system", no_argument, NULL, ARG_SYSTEM },
723 { "user", no_argument, NULL, ARG_USER },
724 { "test", no_argument, NULL, ARG_TEST },
725 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
726 { "help", no_argument, NULL, 'h' },
727 { "version", no_argument, NULL, ARG_VERSION },
728 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
729 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
730 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
731 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
732 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
733 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
734 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
735 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
736 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
748 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
753 r = log_set_max_level_from_string(optarg);
755 log_error("Failed to parse log level %s.", optarg);
762 r = log_set_target_from_string(optarg);
764 log_error("Failed to parse log target %s.", optarg);
773 r = log_show_color_from_string(optarg);
775 log_error("Failed to parse log color setting %s.", optarg);
779 log_show_color(true);
783 case ARG_LOG_LOCATION:
785 r = log_show_location_from_string(optarg);
787 log_error("Failed to parse log location setting %s.", optarg);
791 log_show_location(true);
795 case ARG_DEFAULT_STD_OUTPUT:
796 r = exec_output_from_string(optarg);
798 log_error("Failed to parse default standard output setting %s.", optarg);
801 arg_default_std_output = r;
804 case ARG_DEFAULT_STD_ERROR:
805 r = exec_output_from_string(optarg);
807 log_error("Failed to parse default standard error output setting %s.", optarg);
810 arg_default_std_error = r;
815 r = set_default_unit(optarg);
817 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
824 arg_running_as = SYSTEMD_SYSTEM;
828 arg_running_as = SYSTEMD_USER;
832 arg_action = ACTION_TEST;
833 if (arg_no_pager < 0)
842 arg_action = ACTION_VERSION;
845 case ARG_DUMP_CONFIGURATION_ITEMS:
846 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
850 r = optarg ? parse_boolean(optarg) : 1;
852 log_error("Failed to parse dump core boolean %s.", optarg);
858 case ARG_CRASH_SHELL:
859 r = optarg ? parse_boolean(optarg) : 1;
861 log_error("Failed to parse crash shell boolean %s.", optarg);
867 case ARG_CONFIRM_SPAWN:
868 r = optarg ? parse_boolean(optarg) : 1;
870 log_error("Failed to parse confirm spawn boolean %s.", optarg);
873 arg_confirm_spawn = r;
876 case ARG_SHOW_STATUS:
878 r = parse_show_status(optarg, &arg_show_status);
880 log_error("Failed to parse show status boolean %s.", optarg);
884 arg_show_status = SHOW_STATUS_YES;
887 case ARG_DESERIALIZE: {
891 r = safe_atoi(optarg, &fd);
892 if (r < 0 || fd < 0) {
893 log_error("Failed to parse deserialize option %s.", optarg);
894 return r < 0 ? r : -EINVAL;
897 fd_cloexec(fd, true);
901 log_error("Failed to open serialization fd: %m");
905 if (arg_serialization)
906 fclose(arg_serialization);
908 arg_serialization = f;
913 case ARG_SWITCHED_ROOT:
914 arg_switched_root = true;
918 arg_action = ACTION_HELP;
919 if (arg_no_pager < 0)
924 log_set_max_level(LOG_DEBUG);
930 /* Just to eat away the sysvinit kernel
931 * cmdline args without getopt() error
932 * messages that we'll parse in
933 * parse_proc_cmdline_word() or ignore. */
942 assert_not_reached("Unhandled option code.");
945 if (optind < argc && getpid() != 1) {
946 /* Hmm, when we aren't run as init system
947 * let's complain about excess arguments */
949 log_error("Excess arguments.");
956 static int help(void) {
958 printf("%s [OPTIONS...]\n\n"
959 "Starts up and maintains the system or user services.\n\n"
960 " -h --help Show this help\n"
961 " --test Determine startup sequence, dump it and exit\n"
962 " --no-pager Do not pipe output into a pager\n"
963 " --dump-configuration-items Dump understood unit configuration items\n"
964 " --unit=UNIT Set default unit\n"
965 " --system Run a system instance, even if PID != 1\n"
966 " --user Run a user instance\n"
967 " --dump-core[=0|1] Dump core on crash\n"
968 " --crash-shell[=0|1] Run shell on crash\n"
969 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
970 " --show-status[=0|1] Show status updates on the console during bootup\n"
971 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
972 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
973 " --log-color[=0|1] Highlight important log messages\n"
974 " --log-location[=0|1] Include code location in log messages\n"
975 " --default-standard-output= Set default standard output for services\n"
976 " --default-standard-error= Set default standard error output for services\n",
977 program_invocation_short_name);
982 static int version(void) {
983 puts(PACKAGE_STRING);
984 puts(SYSTEMD_FEATURES);
989 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
998 r = manager_open_serialization(m, &f);
1000 log_error("Failed to create serialization file: %s", strerror(-r));
1004 /* Make sure nothing is really destructed when we shut down */
1006 bus_manager_send_reloading(m, true);
1011 log_error("Failed to allocate fd set: %s", strerror(-r));
1015 r = manager_serialize(m, f, fds, switching_root);
1017 log_error("Failed to serialize state: %s", strerror(-r));
1021 if (fseeko(f, 0, SEEK_SET) < 0) {
1022 log_error("Failed to rewind serialization fd: %m");
1026 r = fd_cloexec(fileno(f), false);
1028 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1032 r = fdset_cloexec(fds, false);
1034 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1052 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1056 assert(saved_rlimit);
1058 /* Save the original RLIMIT_NOFILE so that we can reset it
1059 * later when transitioning from the initrd to the main
1060 * systemd or suchlike. */
1061 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1062 log_error("Reading RLIMIT_NOFILE failed: %m");
1066 /* Make sure forked processes get the default kernel setting */
1067 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1070 rl = newdup(struct rlimit, saved_rlimit, 1);
1074 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1077 /* Bump up the resource limit for ourselves substantially */
1078 nl.rlim_cur = nl.rlim_max = 64*1024;
1079 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1081 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1088 static void test_mtab(void) {
1090 static const char ok[] =
1091 "/proc/self/mounts\0"
1093 "../proc/self/mounts\0"
1096 _cleanup_free_ char *p = NULL;
1099 /* Check that /etc/mtab is a symlink to the right place or
1100 * non-existing. But certainly not a file, or a symlink to
1101 * some weird place... */
1103 r = readlink_malloc("/etc/mtab", &p);
1106 if (r >= 0 && nulstr_contains(ok, p))
1109 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1110 "This is not supported anymore. "
1111 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1114 static void test_usr(void) {
1116 /* Check that /usr is not a separate fs */
1118 if (dir_is_empty("/usr") <= 0)
1121 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1122 "Some things will probably break (sometimes even silently) in mysterious ways. "
1123 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1126 static int initialize_join_controllers(void) {
1127 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1128 * + "net_prio". We'd like to add "cpuset" to the mix, but
1129 * "cpuset" does't really work for groups with no initialized
1132 arg_join_controllers = new(char**, 3);
1133 if (!arg_join_controllers)
1136 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1137 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1138 arg_join_controllers[2] = NULL;
1140 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1141 free_join_controllers();
1148 static int enforce_syscall_archs(Set *archs) {
1150 scmp_filter_ctx *seccomp;
1155 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1159 SET_FOREACH(id, arg_syscall_archs, i) {
1160 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1164 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1169 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1171 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1175 r = seccomp_load(seccomp);
1177 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1180 seccomp_release(seccomp);
1187 static int status_welcome(void) {
1188 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1191 r = parse_env_file("/etc/os-release", NEWLINE,
1192 "PRETTY_NAME", &pretty_name,
1193 "ANSI_COLOR", &ansi_color,
1196 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1197 "PRETTY_NAME", &pretty_name,
1198 "ANSI_COLOR", &ansi_color,
1202 if (r < 0 && r != -ENOENT)
1203 log_warning("Failed to read os-release file: %s", strerror(-r));
1205 return status_printf(NULL, false, false,
1206 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1207 isempty(ansi_color) ? "1" : ansi_color,
1208 isempty(pretty_name) ? "Linux" : pretty_name);
1211 static int write_container_id(void) {
1214 c = getenv("container");
1218 return write_string_file("/run/systemd/container", c);
1221 int main(int argc, char *argv[]) {
1223 int r, retval = EXIT_FAILURE;
1224 usec_t before_startup, after_startup;
1225 char timespan[FORMAT_TIMESPAN_MAX];
1227 bool reexecute = false;
1228 const char *shutdown_verb = NULL;
1229 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1230 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1231 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1232 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1233 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1234 static char systemd[] = "systemd";
1235 bool skip_setup = false;
1237 bool loaded_policy = false;
1238 bool arm_reboot_watchdog = false;
1239 bool queue_default_job = false;
1240 bool empty_etc = false;
1241 char *switch_root_dir = NULL, *switch_root_init = NULL;
1242 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1244 #ifdef HAVE_SYSV_COMPAT
1245 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1246 /* This is compatibility support for SysV, where
1247 * calling init as a user is identical to telinit. */
1250 execv(SYSTEMCTL_BINARY_PATH, argv);
1251 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1256 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1257 dual_timestamp_get(&userspace_timestamp);
1259 /* Determine if this is a reexecution or normal bootup. We do
1260 * the full command line parsing much later, so let's just
1261 * have a quick peek here. */
1262 if (strv_find(argv+1, "--deserialize"))
1265 /* If we have switched root, do all the special setup
1267 if (strv_find(argv+1, "--switched-root"))
1270 /* If we get started via the /sbin/init symlink then we are
1271 called 'init'. After a subsequent reexecution we are then
1272 called 'systemd'. That is confusing, hence let's call us
1273 systemd right-away. */
1274 program_invocation_short_name = systemd;
1275 prctl(PR_SET_NAME, systemd);
1280 log_show_color(isatty(STDERR_FILENO) > 0);
1281 log_set_upgrade_syslog_to_journal(true);
1283 /* Disable the umask logic */
1287 if (getpid() == 1 && detect_container(NULL) <= 0) {
1289 /* Running outside of a container as PID 1 */
1290 arg_running_as = SYSTEMD_SYSTEM;
1292 log_set_target(LOG_TARGET_KMSG);
1296 initrd_timestamp = userspace_timestamp;
1299 mount_setup_early();
1300 dual_timestamp_get(&security_start_timestamp);
1301 if (selinux_setup(&loaded_policy) < 0)
1303 if (ima_setup() < 0)
1305 if (smack_setup(&loaded_policy) < 0)
1307 dual_timestamp_get(&security_finish_timestamp);
1310 if (label_init(NULL) < 0)
1314 if (clock_is_localtime() > 0) {
1318 * The very first call of settimeofday() also does a time warp in the kernel.
1320 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1321 * external tools to take care of maintaining the RTC and do all adjustments.
1322 * This matches the behavior of Windows, which leaves the RTC alone if the
1323 * registry tells that the RTC runs in UTC.
1325 r = clock_set_timezone(&min);
1327 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1329 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1330 } else if (!in_initrd()) {
1332 * Do a dummy very first call to seal the kernel's time warp magic.
1334 * Do not call this this from inside the initrd. The initrd might not
1335 * carry /etc/adjtime with LOCAL, but the real system could be set up
1336 * that way. In such case, we need to delay the time-warp or the sealing
1337 * until we reach the real system.
1339 * Do no set the kernel's timezone. The concept of local time cannot
1340 * be supported reliably, the time will jump or be incorrect at every daylight
1341 * saving time change. All kernel local time concepts will be treated
1344 clock_reset_timewarp();
1348 /* Set the default for later on, but don't actually
1349 * open the logs like this for now. Note that if we
1350 * are transitioning from the initrd there might still
1351 * be journal fd open, and we shouldn't attempt
1352 * opening that before we parsed /proc/cmdline which
1353 * might redirect output elsewhere. */
1354 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1356 } else if (getpid() == 1) {
1357 /* Running inside a container, as PID 1 */
1358 arg_running_as = SYSTEMD_SYSTEM;
1359 log_set_target(LOG_TARGET_CONSOLE);
1360 log_close_console(); /* force reopen of /dev/console */
1363 /* For the later on, see above... */
1364 log_set_target(LOG_TARGET_JOURNAL);
1366 /* clear the kernel timestamp,
1367 * because we are in a container */
1368 kernel_timestamp.monotonic = 0ULL;
1369 kernel_timestamp.realtime = 0ULL;
1372 /* Running as user instance */
1373 arg_running_as = SYSTEMD_USER;
1374 log_set_target(LOG_TARGET_AUTO);
1377 /* clear the kernel timestamp,
1378 * because we are not PID 1 */
1379 kernel_timestamp.monotonic = 0ULL;
1380 kernel_timestamp.realtime = 0ULL;
1383 /* Initialize default unit */
1384 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1386 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1390 r = initialize_join_controllers();
1394 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1395 * /proc/$PID/fd is available. */
1396 if (getpid() == 1) {
1397 r = mount_setup(loaded_policy);
1402 /* Reset all signal handlers. */
1403 assert_se(reset_all_signal_handlers() == 0);
1405 ignore_signals(SIGNALS_IGNORE, -1);
1407 if (parse_config_file() < 0)
1410 if (arg_running_as == SYSTEMD_SYSTEM)
1411 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1414 /* Note that this also parses bits from the kernel command
1415 * line, including "debug". */
1416 log_parse_environment();
1418 if (parse_argv(argc, argv) < 0)
1421 if (arg_action == ACTION_TEST &&
1423 log_error("Don't run test mode as root.");
1427 if (arg_running_as == SYSTEMD_USER &&
1428 arg_action == ACTION_RUN &&
1430 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1434 if (arg_running_as == SYSTEMD_SYSTEM &&
1435 arg_action == ACTION_RUN &&
1436 running_in_chroot() > 0) {
1437 log_error("Cannot be run in a chroot() environment.");
1441 if (arg_action == ACTION_TEST)
1444 pager_open_if_enabled();
1446 if (arg_action == ACTION_HELP) {
1449 } else if (arg_action == ACTION_VERSION) {
1452 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1453 unit_dump_config_items(stdout);
1454 retval = EXIT_SUCCESS;
1456 } else if (arg_action == ACTION_DONE) {
1457 retval = EXIT_SUCCESS;
1461 if (arg_running_as == SYSTEMD_USER &&
1462 !getenv("XDG_RUNTIME_DIR")) {
1463 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1467 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1469 /* Close logging fds, in order not to confuse fdset below */
1472 /* Remember open file descriptors for later deserialization */
1473 r = fdset_new_fill(&fds);
1475 log_error("Failed to allocate fd set: %s", strerror(-r));
1478 fdset_cloexec(fds, true);
1480 if (arg_serialization)
1481 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1483 if (arg_running_as == SYSTEMD_SYSTEM)
1484 /* Become a session leader if we aren't one yet. */
1487 /* Move out of the way, so that we won't block unmounts */
1488 assert_se(chdir("/") == 0);
1490 /* Reset the console, but only if this is really init and we
1491 * are freshly booted */
1492 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {
1494 /* If we are init, we connect stdin/stdout/stderr to
1495 * /dev/null and make sure we don't have a controlling
1499 if (getpid() == 1 && !skip_setup)
1503 /* Open the logging devices, if possible and necessary */
1506 if (arg_show_status == _SHOW_STATUS_UNSET)
1507 arg_show_status = SHOW_STATUS_YES;
1509 /* Make sure we leave a core dump without panicing the
1511 if (getpid() == 1) {
1512 install_crash_handler();
1514 r = mount_cgroup_controllers(arg_join_controllers);
1519 if (arg_running_as == SYSTEMD_SYSTEM) {
1520 const char *virtualization = NULL;
1522 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1523 arg_action == ACTION_TEST ? "test " : "" );
1525 detect_virtualization(&virtualization);
1527 log_info("Detected virtualization '%s'.", virtualization);
1529 write_container_id();
1531 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1534 log_info("Running in initial RAM disk.");
1536 /* Let's check whether /etc is already populated. We
1537 * don't actually really check for that, but use
1538 * /etc/machine-id as flag file. This allows container
1539 * managers and installers to provision a couple of
1540 * files already. If the container manager wants to
1541 * provision the machine ID itself it should pass
1542 * $container_uuid to PID 1.*/
1544 empty_etc = access("/etc/machine-id", F_OK) < 0;
1546 log_info("Running with unpopulated /etc.");
1548 _cleanup_free_ char *t;
1550 t = uid_to_name(getuid());
1551 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1552 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1555 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1556 if (arg_show_status > 0 || plymouth_running())
1563 machine_id_setup(NULL);
1570 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1571 watchdog_set_timeout(&arg_runtime_watchdog);
1573 if (arg_timer_slack_nsec != NSEC_INFINITY)
1574 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1575 log_error("Failed to adjust timer slack: %m");
1577 if (arg_capability_bounding_set_drop) {
1578 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1580 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1583 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1585 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1590 if (arg_syscall_archs) {
1591 r = enforce_syscall_archs(arg_syscall_archs);
1596 if (arg_running_as == SYSTEMD_USER) {
1597 /* Become reaper of our children */
1598 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1599 log_warning("Failed to make us a subreaper: %m");
1600 if (errno == EINVAL)
1601 log_info("Perhaps the kernel version is too old (< 3.4?)");
1605 if (arg_running_as == SYSTEMD_SYSTEM) {
1606 bump_rlimit_nofile(&saved_rlimit_nofile);
1609 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1611 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1613 log_info("Populated /etc with preset unit settings.");
1617 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1619 log_error("Failed to allocate manager object: %s", strerror(-r));
1623 m->confirm_spawn = arg_confirm_spawn;
1624 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1625 m->default_std_output = arg_default_std_output;
1626 m->default_std_error = arg_default_std_error;
1627 m->default_restart_usec = arg_default_restart_usec;
1628 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1629 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1630 m->default_start_limit_interval = arg_default_start_limit_interval;
1631 m->default_start_limit_burst = arg_default_start_limit_burst;
1632 m->default_cpu_accounting = arg_default_cpu_accounting;
1633 m->default_blockio_accounting = arg_default_blockio_accounting;
1634 m->default_memory_accounting = arg_default_memory_accounting;
1635 m->runtime_watchdog = arg_runtime_watchdog;
1636 m->shutdown_watchdog = arg_shutdown_watchdog;
1637 m->start_timeout_usec = arg_start_timeout_usec;
1638 m->start_timeout_action = arg_start_timeout_action;
1639 free_and_strdup(&m->start_timeout_reboot_arg, arg_start_timeout_reboot_arg);
1641 m->userspace_timestamp = userspace_timestamp;
1642 m->kernel_timestamp = kernel_timestamp;
1643 m->initrd_timestamp = initrd_timestamp;
1644 m->security_start_timestamp = security_start_timestamp;
1645 m->security_finish_timestamp = security_finish_timestamp;
1647 manager_set_default_rlimits(m, arg_default_rlimit);
1648 manager_environment_add(m, NULL, arg_default_environment);
1649 manager_set_show_status(m, arg_show_status);
1650 manager_set_first_boot(m, empty_etc);
1652 /* Remember whether we should queue the default job */
1653 queue_default_job = !arg_serialization || arg_switched_root;
1655 before_startup = now(CLOCK_MONOTONIC);
1657 r = manager_startup(m, arg_serialization, fds);
1659 log_error("Failed to fully start up daemon: %s", strerror(-r));
1661 /* This will close all file descriptors that were opened, but
1662 * not claimed by any unit. */
1666 if (arg_serialization) {
1667 fclose(arg_serialization);
1668 arg_serialization = NULL;
1671 if (queue_default_job) {
1672 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1673 Unit *target = NULL;
1674 Job *default_unit_job;
1676 log_debug("Activating default unit: %s", arg_default_unit);
1678 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1680 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1681 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1682 log_error("Failed to load default target: %s", strerror(-target->load_error));
1683 else if (target->load_state == UNIT_MASKED)
1684 log_error("Default target masked.");
1686 if (!target || target->load_state != UNIT_LOADED) {
1687 log_info("Trying to load rescue target...");
1689 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1691 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1693 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1694 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1696 } else if (target->load_state == UNIT_MASKED) {
1697 log_error("Rescue target masked.");
1702 assert(target->load_state == UNIT_LOADED);
1704 if (arg_action == ACTION_TEST) {
1705 printf("-> By units:\n");
1706 manager_dump_units(m, stdout, "\t");
1709 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1711 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1713 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1715 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1719 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1723 m->default_unit_job_id = default_unit_job->id;
1725 after_startup = now(CLOCK_MONOTONIC);
1726 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1727 "Loaded units and determined initial transaction in %s.",
1728 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1730 if (arg_action == ACTION_TEST) {
1731 printf("-> By jobs:\n");
1732 manager_dump_jobs(m, stdout, "\t");
1733 retval = EXIT_SUCCESS;
1739 r = manager_loop(m);
1741 log_error("Failed to run mainloop: %s", strerror(-r));
1745 switch (m->exit_code) {
1748 retval = EXIT_SUCCESS;
1752 case MANAGER_RELOAD:
1753 log_info("Reloading.");
1754 r = manager_reload(m);
1756 log_error("Failed to reload: %s", strerror(-r));
1759 case MANAGER_REEXECUTE:
1761 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1765 log_notice("Reexecuting.");
1768 case MANAGER_SWITCH_ROOT:
1769 /* Steal the switch root parameters */
1770 switch_root_dir = m->switch_root;
1771 switch_root_init = m->switch_root_init;
1772 m->switch_root = m->switch_root_init = NULL;
1774 if (!switch_root_init)
1775 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1779 log_notice("Switching root.");
1782 case MANAGER_REBOOT:
1783 case MANAGER_POWEROFF:
1785 case MANAGER_KEXEC: {
1786 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1787 [MANAGER_REBOOT] = "reboot",
1788 [MANAGER_POWEROFF] = "poweroff",
1789 [MANAGER_HALT] = "halt",
1790 [MANAGER_KEXEC] = "kexec"
1793 assert_se(shutdown_verb = table[m->exit_code]);
1794 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1796 log_notice("Shutting down.");
1801 assert_not_reached("Unknown exit code.");
1813 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1814 free(arg_default_rlimit[j]);
1815 arg_default_rlimit[j] = NULL;
1818 free(arg_default_unit);
1819 arg_default_unit = NULL;
1821 free_join_controllers();
1823 strv_free(arg_default_environment);
1824 arg_default_environment = NULL;
1826 set_free(arg_syscall_archs);
1827 arg_syscall_archs = NULL;
1829 free(arg_start_timeout_reboot_arg);
1830 arg_start_timeout_reboot_arg = NULL;
1836 unsigned i, args_size;
1838 /* Close and disarm the watchdog, so that the new
1839 * instance can reinitialize it, but doesn't get
1840 * rebooted while we do that */
1841 watchdog_close(true);
1843 /* Reset the RLIMIT_NOFILE to the kernel default, so
1844 * that the new systemd can pass the kernel default to
1845 * its child processes */
1846 if (saved_rlimit_nofile.rlim_cur > 0)
1847 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1849 if (switch_root_dir) {
1850 /* Kill all remaining processes from the
1851 * initrd, but don't wait for them, so that we
1852 * can handle the SIGCHLD for them after
1854 broadcast_signal(SIGTERM, false, true);
1856 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1857 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1859 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1862 args_size = MAX(6, argc+1);
1863 args = newa(const char*, args_size);
1865 if (!switch_root_init) {
1868 /* First try to spawn ourselves with the right
1869 * path, and with full serialization. We do
1870 * this only if the user didn't specify an
1871 * explicit init to spawn. */
1873 assert(arg_serialization);
1876 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1880 args[i++] = SYSTEMD_BINARY_PATH;
1881 if (switch_root_dir)
1882 args[i++] = "--switched-root";
1883 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1884 args[i++] = "--deserialize";
1888 /* do not pass along the environment we inherit from the kernel or initrd */
1889 if (switch_root_dir)
1892 assert(i <= args_size);
1893 execv(args[0], (char* const*) args);
1896 /* Try the fallback, if there is any, without any
1897 * serialization. We pass the original argv[] and
1898 * envp[]. (Well, modulo the ordering changes due to
1899 * getopt() in argv[], and some cleanups in envp[],
1900 * but let's hope that doesn't matter.) */
1902 if (arg_serialization) {
1903 fclose(arg_serialization);
1904 arg_serialization = NULL;
1912 /* Reopen the console */
1913 make_console_stdio();
1915 for (j = 1, i = 1; j < (unsigned) argc; j++)
1916 args[i++] = argv[j];
1918 assert(i <= args_size);
1920 /* Reenable any blocked signals, especially important
1921 * if we switch from initial ramdisk to init=... */
1922 reset_all_signal_handlers();
1923 reset_signal_mask();
1925 if (switch_root_init) {
1926 args[0] = switch_root_init;
1927 execv(args[0], (char* const*) args);
1928 log_warning("Failed to execute configured init, trying fallback: %m");
1931 args[0] = "/sbin/init";
1932 execv(args[0], (char* const*) args);
1934 if (errno == ENOENT) {
1935 log_warning("No /sbin/init, trying fallback");
1937 args[0] = "/bin/sh";
1939 execv(args[0], (char* const*) args);
1940 log_error("Failed to execute /bin/sh, giving up: %m");
1942 log_warning("Failed to execute /sbin/init, giving up: %m");
1945 if (arg_serialization) {
1946 fclose(arg_serialization);
1947 arg_serialization = NULL;
1955 #ifdef HAVE_VALGRIND_VALGRIND_H
1956 /* If we are PID 1 and running under valgrind, then let's exit
1957 * here explicitly. valgrind will only generate nice output on
1958 * exit(), not on exec(), hence let's do the former not the
1960 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1964 if (shutdown_verb) {
1965 char log_level[DECIMAL_STR_MAX(int) + 1];
1966 const char* command_line[9] = {
1967 SYSTEMD_SHUTDOWN_BINARY_PATH,
1969 "--log-level", log_level,
1973 _cleanup_strv_free_ char **env_block = NULL;
1975 assert(command_line[pos] == NULL);
1976 env_block = strv_copy(environ);
1978 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1980 switch (log_get_target()) {
1981 case LOG_TARGET_KMSG:
1982 case LOG_TARGET_JOURNAL_OR_KMSG:
1983 case LOG_TARGET_SYSLOG_OR_KMSG:
1984 command_line[pos++] = "kmsg";
1987 case LOG_TARGET_CONSOLE:
1989 command_line[pos++] = "console";
1993 if (log_get_show_color())
1994 command_line[pos++] = "--log-color";
1996 if (log_get_show_location())
1997 command_line[pos++] = "--log-location";
1999 assert(pos < ELEMENTSOF(command_line));
2001 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2004 /* If we reboot let's set the shutdown
2005 * watchdog and tell the shutdown binary to
2006 * repeatedly ping it */
2007 watchdog_set_timeout(&arg_shutdown_watchdog);
2008 watchdog_close(false);
2010 /* Tell the binary how often to ping, ignore failure */
2011 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2012 strv_push(&env_block, e);
2014 watchdog_close(true);
2016 /* Avoid the creation of new processes forked by the
2017 * kernel; at this point, we will not listen to the
2019 if (detect_container(NULL) <= 0)
2020 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2022 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2023 log_error("Failed to execute shutdown binary, %s: %m",
2024 getpid() == 1 ? "freezing" : "quitting");