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 "rescue", SPECIAL_RESCUE_TARGET,
276 "single", SPECIAL_RESCUE_TARGET,
277 "-s", SPECIAL_RESCUE_TARGET,
278 "s", SPECIAL_RESCUE_TARGET,
279 "S", SPECIAL_RESCUE_TARGET,
280 "1", SPECIAL_RESCUE_TARGET,
281 "2", SPECIAL_RUNLEVEL2_TARGET,
282 "3", SPECIAL_RUNLEVEL3_TARGET,
283 "4", SPECIAL_RUNLEVEL4_TARGET,
284 "5", SPECIAL_RUNLEVEL5_TARGET,
290 if (streq(key, "systemd.unit") && value) {
293 return set_default_unit(value);
295 } else if (streq(key, "rd.systemd.unit") && value) {
298 return set_default_unit(value);
300 } else if (streq(key, "systemd.dump_core") && value) {
302 r = parse_boolean(value);
304 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
308 } else if (streq(key, "systemd.crash_shell") && value) {
310 r = parse_boolean(value);
312 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
316 } else if (streq(key, "systemd.crash_chvt") && value) {
318 if (safe_atoi(value, &r) < 0)
319 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
323 } else if (streq(key, "systemd.confirm_spawn") && value) {
325 r = parse_boolean(value);
327 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
329 arg_confirm_spawn = r;
331 } else if (streq(key, "systemd.show_status") && value) {
333 r = parse_show_status(value, &arg_show_status);
335 log_warning("Failed to parse show status switch %s. Ignoring.", value);
337 } else if (streq(key, "systemd.default_standard_output") && value) {
339 r = exec_output_from_string(value);
341 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
343 arg_default_std_output = r;
345 } else if (streq(key, "systemd.default_standard_error") && value) {
347 r = exec_output_from_string(value);
349 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
351 arg_default_std_error = r;
353 } else if (streq(key, "systemd.setenv") && value) {
355 if (env_assignment_is_valid(value)) {
358 env = strv_env_set(arg_default_environment, value);
360 arg_default_environment = env;
362 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
364 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
366 } else if (streq(key, "quiet") && !value) {
368 log_set_max_level(LOG_NOTICE);
370 if (arg_show_status == _SHOW_STATUS_UNSET)
371 arg_show_status = SHOW_STATUS_AUTO;
373 } else if (streq(key, "debug") && !value) {
375 /* Note that log_parse_environment() handles 'debug'
376 * too, and sets the log level to LOG_DEBUG. */
378 if (detect_container(NULL) > 0)
379 log_set_target(LOG_TARGET_CONSOLE);
381 } else if (!in_initrd() && !value) {
384 /* SysV compatibility */
385 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
386 if (streq(key, rlmap[i]))
387 return set_default_unit(rlmap[i+1]);
393 #define DEFINE_SETTER(name, func, descr) \
394 static int name(const char *unit, \
395 const char *filename, \
397 const char *section, \
398 unsigned section_line, \
399 const char *lvalue, \
401 const char *rvalue, \
413 log_syntax(unit, LOG_ERR, filename, line, -r, \
414 "Invalid " descr "'%s': %s", \
415 rvalue, strerror(-r)); \
420 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
421 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
422 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
423 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
425 static int config_parse_cpu_affinity2(
427 const char *filename,
430 unsigned section_line,
437 const char *word, *state;
446 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
451 if (!(t = strndup(word, l)))
454 r = safe_atou(t, &cpu);
458 if (!(c = cpu_set_malloc(&ncpus)))
461 if (r < 0 || cpu >= ncpus) {
462 log_syntax(unit, LOG_ERR, filename, line, -r,
463 "Failed to parse CPU affinity '%s'", rvalue);
468 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
471 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
472 "Trailing garbage, ignoring.");
475 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
476 log_warning_unit(unit, "Failed to set CPU affinity: %m");
484 static int config_parse_show_status(
486 const char *filename,
489 unsigned section_line,
497 ShowStatus *b = data;
504 k = parse_show_status(rvalue, b);
506 log_syntax(unit, LOG_ERR, filename, line, -k,
507 "Failed to parse show status setting, ignoring: %s", rvalue);
514 static void strv_free_free(char ***l) {
526 static void free_join_controllers(void) {
527 strv_free_free(arg_join_controllers);
528 arg_join_controllers = NULL;
531 static int config_parse_join_controllers(const char *unit,
532 const char *filename,
535 unsigned section_line,
543 const char *word, *state;
550 free_join_controllers();
552 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
555 s = strndup(word, length);
559 l = strv_split(s, ",");
564 if (strv_length(l) <= 1) {
569 if (!arg_join_controllers) {
570 arg_join_controllers = new(char**, 2);
571 if (!arg_join_controllers) {
576 arg_join_controllers[0] = l;
577 arg_join_controllers[1] = NULL;
584 t = new0(char**, n+2);
592 for (a = arg_join_controllers; *a; a++) {
594 if (strv_overlap(*a, l)) {
595 if (strv_extend_strv(&l, *a) < 0) {
615 t[n++] = strv_uniq(l);
617 strv_free_free(arg_join_controllers);
618 arg_join_controllers = t;
622 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
623 "Trailing garbage, ignoring.");
628 static int parse_config_file(void) {
630 const ConfigTableItem items[] = {
631 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
632 { "Manager", "LogTarget", config_parse_target, 0, NULL },
633 { "Manager", "LogColor", config_parse_color, 0, NULL },
634 { "Manager", "LogLocation", config_parse_location, 0, NULL },
635 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
636 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
637 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
638 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
639 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
640 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
641 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
642 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
643 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
645 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
647 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
648 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
649 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
650 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
651 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
652 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
653 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
654 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
655 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
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 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
674 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
675 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
676 { "Manager", "StartTimeoutSec", config_parse_sec, 0, &arg_start_timeout_usec },
677 { "Manager", "StartTimeoutAction", config_parse_failure_action, 0, &arg_start_timeout_action },
678 { "Manager", "StartTimeoutRebootArgument",config_parse_string, 0, &arg_start_timeout_reboot_arg },
684 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
685 config_parse(NULL, fn, NULL,
687 config_item_table_lookup, items,
688 false, false, true, NULL);
693 static int parse_argv(int argc, char *argv[]) {
696 ARG_LOG_LEVEL = 0x100,
706 ARG_DUMP_CONFIGURATION_ITEMS,
713 ARG_DEFAULT_STD_OUTPUT,
714 ARG_DEFAULT_STD_ERROR
717 static const struct option options[] = {
718 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
719 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
720 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
721 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
722 { "unit", required_argument, NULL, ARG_UNIT },
723 { "system", no_argument, NULL, ARG_SYSTEM },
724 { "user", no_argument, NULL, ARG_USER },
725 { "test", no_argument, NULL, ARG_TEST },
726 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
727 { "help", no_argument, NULL, 'h' },
728 { "version", no_argument, NULL, ARG_VERSION },
729 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
730 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
731 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
732 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
733 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
734 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
735 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
736 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
737 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
749 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
754 r = log_set_max_level_from_string(optarg);
756 log_error("Failed to parse log level %s.", optarg);
763 r = log_set_target_from_string(optarg);
765 log_error("Failed to parse log target %s.", optarg);
774 r = log_show_color_from_string(optarg);
776 log_error("Failed to parse log color setting %s.", optarg);
780 log_show_color(true);
784 case ARG_LOG_LOCATION:
786 r = log_show_location_from_string(optarg);
788 log_error("Failed to parse log location setting %s.", optarg);
792 log_show_location(true);
796 case ARG_DEFAULT_STD_OUTPUT:
797 r = exec_output_from_string(optarg);
799 log_error("Failed to parse default standard output setting %s.", optarg);
802 arg_default_std_output = r;
805 case ARG_DEFAULT_STD_ERROR:
806 r = exec_output_from_string(optarg);
808 log_error("Failed to parse default standard error output setting %s.", optarg);
811 arg_default_std_error = r;
816 r = set_default_unit(optarg);
818 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
825 arg_running_as = SYSTEMD_SYSTEM;
829 arg_running_as = SYSTEMD_USER;
833 arg_action = ACTION_TEST;
834 if (arg_no_pager < 0)
843 arg_action = ACTION_VERSION;
846 case ARG_DUMP_CONFIGURATION_ITEMS:
847 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
851 r = optarg ? parse_boolean(optarg) : 1;
853 log_error("Failed to parse dump core boolean %s.", optarg);
859 case ARG_CRASH_SHELL:
860 r = optarg ? parse_boolean(optarg) : 1;
862 log_error("Failed to parse crash shell boolean %s.", optarg);
868 case ARG_CONFIRM_SPAWN:
869 r = optarg ? parse_boolean(optarg) : 1;
871 log_error("Failed to parse confirm spawn boolean %s.", optarg);
874 arg_confirm_spawn = r;
877 case ARG_SHOW_STATUS:
879 r = parse_show_status(optarg, &arg_show_status);
881 log_error("Failed to parse show status boolean %s.", optarg);
885 arg_show_status = SHOW_STATUS_YES;
888 case ARG_DESERIALIZE: {
892 r = safe_atoi(optarg, &fd);
893 if (r < 0 || fd < 0) {
894 log_error("Failed to parse deserialize option %s.", optarg);
895 return r < 0 ? r : -EINVAL;
898 fd_cloexec(fd, true);
902 log_error("Failed to open serialization fd: %m");
906 if (arg_serialization)
907 fclose(arg_serialization);
909 arg_serialization = f;
914 case ARG_SWITCHED_ROOT:
915 arg_switched_root = true;
919 arg_action = ACTION_HELP;
920 if (arg_no_pager < 0)
925 log_set_max_level(LOG_DEBUG);
931 /* Just to eat away the sysvinit kernel
932 * cmdline args without getopt() error
933 * messages that we'll parse in
934 * parse_proc_cmdline_word() or ignore. */
943 assert_not_reached("Unhandled option code.");
946 if (optind < argc && getpid() != 1) {
947 /* Hmm, when we aren't run as init system
948 * let's complain about excess arguments */
950 log_error("Excess arguments.");
957 static int help(void) {
959 printf("%s [OPTIONS...]\n\n"
960 "Starts up and maintains the system or user services.\n\n"
961 " -h --help Show this help\n"
962 " --test Determine startup sequence, dump it and exit\n"
963 " --no-pager Do not pipe output into a pager\n"
964 " --dump-configuration-items Dump understood unit configuration items\n"
965 " --unit=UNIT Set default unit\n"
966 " --system Run a system instance, even if PID != 1\n"
967 " --user Run a user instance\n"
968 " --dump-core[=0|1] Dump core on crash\n"
969 " --crash-shell[=0|1] Run shell on crash\n"
970 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
971 " --show-status[=0|1] Show status updates on the console during bootup\n"
972 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
973 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
974 " --log-color[=0|1] Highlight important log messages\n"
975 " --log-location[=0|1] Include code location in log messages\n"
976 " --default-standard-output= Set default standard output for services\n"
977 " --default-standard-error= Set default standard error output for services\n",
978 program_invocation_short_name);
983 static int version(void) {
984 puts(PACKAGE_STRING);
985 puts(SYSTEMD_FEATURES);
990 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
999 r = manager_open_serialization(m, &f);
1001 log_error("Failed to create serialization file: %s", strerror(-r));
1005 /* Make sure nothing is really destructed when we shut down */
1007 bus_manager_send_reloading(m, true);
1012 log_error("Failed to allocate fd set: %s", strerror(-r));
1016 r = manager_serialize(m, f, fds, switching_root);
1018 log_error("Failed to serialize state: %s", strerror(-r));
1022 if (fseeko(f, 0, SEEK_SET) < 0) {
1023 log_error("Failed to rewind serialization fd: %m");
1027 r = fd_cloexec(fileno(f), false);
1029 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1033 r = fdset_cloexec(fds, false);
1035 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1053 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1057 assert(saved_rlimit);
1059 /* Save the original RLIMIT_NOFILE so that we can reset it
1060 * later when transitioning from the initrd to the main
1061 * systemd or suchlike. */
1062 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1063 log_error("Reading RLIMIT_NOFILE failed: %m");
1067 /* Make sure forked processes get the default kernel setting */
1068 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1071 rl = newdup(struct rlimit, saved_rlimit, 1);
1075 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1078 /* Bump up the resource limit for ourselves substantially */
1079 nl.rlim_cur = nl.rlim_max = 64*1024;
1080 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1082 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1089 static void test_mtab(void) {
1091 static const char ok[] =
1092 "/proc/self/mounts\0"
1094 "../proc/self/mounts\0"
1097 _cleanup_free_ char *p = NULL;
1100 /* Check that /etc/mtab is a symlink to the right place or
1101 * non-existing. But certainly not a file, or a symlink to
1102 * some weird place... */
1104 r = readlink_malloc("/etc/mtab", &p);
1107 if (r >= 0 && nulstr_contains(ok, p))
1110 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1111 "This is not supported anymore. "
1112 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1115 static void test_usr(void) {
1117 /* Check that /usr is not a separate fs */
1119 if (dir_is_empty("/usr") <= 0)
1122 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1123 "Some things will probably break (sometimes even silently) in mysterious ways. "
1124 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1127 static int initialize_join_controllers(void) {
1128 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1129 * + "net_prio". We'd like to add "cpuset" to the mix, but
1130 * "cpuset" does't really work for groups with no initialized
1133 arg_join_controllers = new(char**, 3);
1134 if (!arg_join_controllers)
1137 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1138 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1139 arg_join_controllers[2] = NULL;
1141 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1142 free_join_controllers();
1149 static int enforce_syscall_archs(Set *archs) {
1151 scmp_filter_ctx *seccomp;
1156 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1160 SET_FOREACH(id, arg_syscall_archs, i) {
1161 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1165 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1170 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1172 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1176 r = seccomp_load(seccomp);
1178 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1181 seccomp_release(seccomp);
1188 static int status_welcome(void) {
1189 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1192 r = parse_env_file("/etc/os-release", NEWLINE,
1193 "PRETTY_NAME", &pretty_name,
1194 "ANSI_COLOR", &ansi_color,
1197 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1198 "PRETTY_NAME", &pretty_name,
1199 "ANSI_COLOR", &ansi_color,
1203 if (r < 0 && r != -ENOENT)
1204 log_warning("Failed to read os-release file: %s", strerror(-r));
1206 return status_printf(NULL, false, false,
1207 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1208 isempty(ansi_color) ? "1" : ansi_color,
1209 isempty(pretty_name) ? "Linux" : pretty_name);
1212 static int write_container_id(void) {
1215 c = getenv("container");
1219 return write_string_file("/run/systemd/container", c);
1222 int main(int argc, char *argv[]) {
1224 int r, retval = EXIT_FAILURE;
1225 usec_t before_startup, after_startup;
1226 char timespan[FORMAT_TIMESPAN_MAX];
1228 bool reexecute = false;
1229 const char *shutdown_verb = NULL;
1230 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1231 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1232 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1233 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1234 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1235 static char systemd[] = "systemd";
1236 bool skip_setup = false;
1238 bool loaded_policy = false;
1239 bool arm_reboot_watchdog = false;
1240 bool queue_default_job = false;
1241 bool empty_etc = false;
1242 char *switch_root_dir = NULL, *switch_root_init = NULL;
1243 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1245 #ifdef HAVE_SYSV_COMPAT
1246 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1247 /* This is compatibility support for SysV, where
1248 * calling init as a user is identical to telinit. */
1251 execv(SYSTEMCTL_BINARY_PATH, argv);
1252 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1257 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1258 dual_timestamp_get(&userspace_timestamp);
1260 /* Determine if this is a reexecution or normal bootup. We do
1261 * the full command line parsing much later, so let's just
1262 * have a quick peek here. */
1263 if (strv_find(argv+1, "--deserialize"))
1266 /* If we have switched root, do all the special setup
1268 if (strv_find(argv+1, "--switched-root"))
1271 /* If we get started via the /sbin/init symlink then we are
1272 called 'init'. After a subsequent reexecution we are then
1273 called 'systemd'. That is confusing, hence let's call us
1274 systemd right-away. */
1275 program_invocation_short_name = systemd;
1276 prctl(PR_SET_NAME, systemd);
1281 log_show_color(isatty(STDERR_FILENO) > 0);
1282 log_set_upgrade_syslog_to_journal(true);
1284 /* Disable the umask logic */
1288 if (getpid() == 1 && detect_container(NULL) <= 0) {
1290 /* Running outside of a container as PID 1 */
1291 arg_running_as = SYSTEMD_SYSTEM;
1293 log_set_target(LOG_TARGET_KMSG);
1297 initrd_timestamp = userspace_timestamp;
1300 mount_setup_early();
1301 dual_timestamp_get(&security_start_timestamp);
1302 if (selinux_setup(&loaded_policy) < 0)
1304 if (ima_setup() < 0)
1306 if (smack_setup(&loaded_policy) < 0)
1308 dual_timestamp_get(&security_finish_timestamp);
1311 if (label_init(NULL) < 0)
1315 if (clock_is_localtime() > 0) {
1319 * The very first call of settimeofday() also does a time warp in the kernel.
1321 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1322 * external tools to take care of maintaining the RTC and do all adjustments.
1323 * This matches the behavior of Windows, which leaves the RTC alone if the
1324 * registry tells that the RTC runs in UTC.
1326 r = clock_set_timezone(&min);
1328 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1330 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1331 } else if (!in_initrd()) {
1333 * Do a dummy very first call to seal the kernel's time warp magic.
1335 * Do not call this this from inside the initrd. The initrd might not
1336 * carry /etc/adjtime with LOCAL, but the real system could be set up
1337 * that way. In such case, we need to delay the time-warp or the sealing
1338 * until we reach the real system.
1340 * Do no set the kernel's timezone. The concept of local time cannot
1341 * be supported reliably, the time will jump or be incorrect at every daylight
1342 * saving time change. All kernel local time concepts will be treated
1345 clock_reset_timewarp();
1349 /* Set the default for later on, but don't actually
1350 * open the logs like this for now. Note that if we
1351 * are transitioning from the initrd there might still
1352 * be journal fd open, and we shouldn't attempt
1353 * opening that before we parsed /proc/cmdline which
1354 * might redirect output elsewhere. */
1355 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1357 } else if (getpid() == 1) {
1358 /* Running inside a container, as PID 1 */
1359 arg_running_as = SYSTEMD_SYSTEM;
1360 log_set_target(LOG_TARGET_CONSOLE);
1361 log_close_console(); /* force reopen of /dev/console */
1364 /* For the later on, see above... */
1365 log_set_target(LOG_TARGET_JOURNAL);
1367 /* clear the kernel timestamp,
1368 * because we are in a container */
1369 kernel_timestamp.monotonic = 0ULL;
1370 kernel_timestamp.realtime = 0ULL;
1373 /* Running as user instance */
1374 arg_running_as = SYSTEMD_USER;
1375 log_set_target(LOG_TARGET_AUTO);
1378 /* clear the kernel timestamp,
1379 * because we are not PID 1 */
1380 kernel_timestamp.monotonic = 0ULL;
1381 kernel_timestamp.realtime = 0ULL;
1384 /* Initialize default unit */
1385 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1387 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1391 r = initialize_join_controllers();
1395 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1396 * /proc/$PID/fd is available. */
1397 if (getpid() == 1) {
1398 r = mount_setup(loaded_policy);
1403 /* Reset all signal handlers. */
1404 assert_se(reset_all_signal_handlers() == 0);
1406 ignore_signals(SIGNALS_IGNORE, -1);
1408 if (parse_config_file() < 0)
1411 if (arg_running_as == SYSTEMD_SYSTEM)
1412 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1415 /* Note that this also parses bits from the kernel command
1416 * line, including "debug". */
1417 log_parse_environment();
1419 if (parse_argv(argc, argv) < 0)
1422 if (arg_action == ACTION_TEST &&
1424 log_error("Don't run test mode as root.");
1428 if (arg_running_as == SYSTEMD_USER &&
1429 arg_action == ACTION_RUN &&
1431 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1435 if (arg_running_as == SYSTEMD_SYSTEM &&
1436 arg_action == ACTION_RUN &&
1437 running_in_chroot() > 0) {
1438 log_error("Cannot be run in a chroot() environment.");
1442 if (arg_action == ACTION_TEST)
1445 pager_open_if_enabled();
1447 if (arg_action == ACTION_HELP) {
1450 } else if (arg_action == ACTION_VERSION) {
1453 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1454 unit_dump_config_items(stdout);
1455 retval = EXIT_SUCCESS;
1457 } else if (arg_action == ACTION_DONE) {
1458 retval = EXIT_SUCCESS;
1462 if (arg_running_as == SYSTEMD_USER &&
1463 !getenv("XDG_RUNTIME_DIR")) {
1464 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1468 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1470 /* Close logging fds, in order not to confuse fdset below */
1473 /* Remember open file descriptors for later deserialization */
1474 r = fdset_new_fill(&fds);
1476 log_error("Failed to allocate fd set: %s", strerror(-r));
1479 fdset_cloexec(fds, true);
1481 if (arg_serialization)
1482 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1484 if (arg_running_as == SYSTEMD_SYSTEM)
1485 /* Become a session leader if we aren't one yet. */
1488 /* Move out of the way, so that we won't block unmounts */
1489 assert_se(chdir("/") == 0);
1491 /* Reset the console, but only if this is really init and we
1492 * are freshly booted */
1493 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {
1495 /* If we are init, we connect stdin/stdout/stderr to
1496 * /dev/null and make sure we don't have a controlling
1500 if (getpid() == 1 && !skip_setup)
1504 /* Open the logging devices, if possible and necessary */
1507 if (arg_show_status == _SHOW_STATUS_UNSET)
1508 arg_show_status = SHOW_STATUS_YES;
1510 /* Make sure we leave a core dump without panicing the
1512 if (getpid() == 1) {
1513 install_crash_handler();
1515 r = mount_cgroup_controllers(arg_join_controllers);
1520 if (arg_running_as == SYSTEMD_SYSTEM) {
1521 const char *virtualization = NULL;
1523 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1524 arg_action == ACTION_TEST ? "test " : "" );
1526 detect_virtualization(&virtualization);
1528 log_info("Detected virtualization '%s'.", virtualization);
1530 write_container_id();
1532 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1535 log_info("Running in initial RAM disk.");
1537 /* Let's check whether /etc is already populated. We
1538 * don't actually really check for that, but use
1539 * /etc/machine-id as flag file. This allows container
1540 * managers and installers to provision a couple of
1541 * files already. If the container manager wants to
1542 * provision the machine ID itself it should pass
1543 * $container_uuid to PID 1.*/
1545 empty_etc = access("/etc/machine-id", F_OK) < 0;
1547 log_info("Running with unpopulated /etc.");
1549 _cleanup_free_ char *t;
1551 t = uid_to_name(getuid());
1552 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1553 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1556 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1557 if (arg_show_status > 0 || plymouth_running())
1564 machine_id_setup(NULL);
1571 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1572 watchdog_set_timeout(&arg_runtime_watchdog);
1574 if (arg_timer_slack_nsec != NSEC_INFINITY)
1575 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1576 log_error("Failed to adjust timer slack: %m");
1578 if (arg_capability_bounding_set_drop) {
1579 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1581 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1584 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1586 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1591 if (arg_syscall_archs) {
1592 r = enforce_syscall_archs(arg_syscall_archs);
1597 if (arg_running_as == SYSTEMD_USER) {
1598 /* Become reaper of our children */
1599 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1600 log_warning("Failed to make us a subreaper: %m");
1601 if (errno == EINVAL)
1602 log_info("Perhaps the kernel version is too old (< 3.4?)");
1606 if (arg_running_as == SYSTEMD_SYSTEM) {
1607 bump_rlimit_nofile(&saved_rlimit_nofile);
1610 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1612 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1614 log_info("Populated /etc with preset unit settings.");
1618 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1620 log_error("Failed to allocate manager object: %s", strerror(-r));
1624 m->confirm_spawn = arg_confirm_spawn;
1625 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1626 m->default_std_output = arg_default_std_output;
1627 m->default_std_error = arg_default_std_error;
1628 m->default_restart_usec = arg_default_restart_usec;
1629 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1630 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1631 m->default_start_limit_interval = arg_default_start_limit_interval;
1632 m->default_start_limit_burst = arg_default_start_limit_burst;
1633 m->default_cpu_accounting = arg_default_cpu_accounting;
1634 m->default_blockio_accounting = arg_default_blockio_accounting;
1635 m->default_memory_accounting = arg_default_memory_accounting;
1636 m->runtime_watchdog = arg_runtime_watchdog;
1637 m->shutdown_watchdog = arg_shutdown_watchdog;
1638 m->start_timeout_usec = arg_start_timeout_usec;
1639 m->start_timeout_action = arg_start_timeout_action;
1640 free_and_strdup(&m->start_timeout_reboot_arg, arg_start_timeout_reboot_arg);
1642 m->userspace_timestamp = userspace_timestamp;
1643 m->kernel_timestamp = kernel_timestamp;
1644 m->initrd_timestamp = initrd_timestamp;
1645 m->security_start_timestamp = security_start_timestamp;
1646 m->security_finish_timestamp = security_finish_timestamp;
1648 manager_set_default_rlimits(m, arg_default_rlimit);
1649 manager_environment_add(m, NULL, arg_default_environment);
1650 manager_set_show_status(m, arg_show_status);
1651 manager_set_first_boot(m, empty_etc);
1653 /* Remember whether we should queue the default job */
1654 queue_default_job = !arg_serialization || arg_switched_root;
1656 before_startup = now(CLOCK_MONOTONIC);
1658 r = manager_startup(m, arg_serialization, fds);
1660 log_error("Failed to fully start up daemon: %s", strerror(-r));
1662 /* This will close all file descriptors that were opened, but
1663 * not claimed by any unit. */
1667 if (arg_serialization) {
1668 fclose(arg_serialization);
1669 arg_serialization = NULL;
1672 if (queue_default_job) {
1673 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1674 Unit *target = NULL;
1675 Job *default_unit_job;
1677 log_debug("Activating default unit: %s", arg_default_unit);
1679 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1681 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1682 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1683 log_error("Failed to load default target: %s", strerror(-target->load_error));
1684 else if (target->load_state == UNIT_MASKED)
1685 log_error("Default target masked.");
1687 if (!target || target->load_state != UNIT_LOADED) {
1688 log_info("Trying to load rescue target...");
1690 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1692 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1694 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1695 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1697 } else if (target->load_state == UNIT_MASKED) {
1698 log_error("Rescue target masked.");
1703 assert(target->load_state == UNIT_LOADED);
1705 if (arg_action == ACTION_TEST) {
1706 printf("-> By units:\n");
1707 manager_dump_units(m, stdout, "\t");
1710 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1712 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1714 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1716 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1720 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1724 m->default_unit_job_id = default_unit_job->id;
1726 after_startup = now(CLOCK_MONOTONIC);
1727 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1728 "Loaded units and determined initial transaction in %s.",
1729 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1731 if (arg_action == ACTION_TEST) {
1732 printf("-> By jobs:\n");
1733 manager_dump_jobs(m, stdout, "\t");
1734 retval = EXIT_SUCCESS;
1740 r = manager_loop(m);
1742 log_error("Failed to run mainloop: %s", strerror(-r));
1746 switch (m->exit_code) {
1749 retval = EXIT_SUCCESS;
1753 case MANAGER_RELOAD:
1754 log_info("Reloading.");
1755 r = manager_reload(m);
1757 log_error("Failed to reload: %s", strerror(-r));
1760 case MANAGER_REEXECUTE:
1762 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1766 log_notice("Reexecuting.");
1769 case MANAGER_SWITCH_ROOT:
1770 /* Steal the switch root parameters */
1771 switch_root_dir = m->switch_root;
1772 switch_root_init = m->switch_root_init;
1773 m->switch_root = m->switch_root_init = NULL;
1775 if (!switch_root_init)
1776 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1780 log_notice("Switching root.");
1783 case MANAGER_REBOOT:
1784 case MANAGER_POWEROFF:
1786 case MANAGER_KEXEC: {
1787 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1788 [MANAGER_REBOOT] = "reboot",
1789 [MANAGER_POWEROFF] = "poweroff",
1790 [MANAGER_HALT] = "halt",
1791 [MANAGER_KEXEC] = "kexec"
1794 assert_se(shutdown_verb = table[m->exit_code]);
1795 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1797 log_notice("Shutting down.");
1802 assert_not_reached("Unknown exit code.");
1814 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1815 free(arg_default_rlimit[j]);
1816 arg_default_rlimit[j] = NULL;
1819 free(arg_default_unit);
1820 arg_default_unit = NULL;
1822 free_join_controllers();
1824 strv_free(arg_default_environment);
1825 arg_default_environment = NULL;
1827 set_free(arg_syscall_archs);
1828 arg_syscall_archs = NULL;
1830 free(arg_start_timeout_reboot_arg);
1831 arg_start_timeout_reboot_arg = NULL;
1837 unsigned i, args_size;
1839 /* Close and disarm the watchdog, so that the new
1840 * instance can reinitialize it, but doesn't get
1841 * rebooted while we do that */
1842 watchdog_close(true);
1844 /* Reset the RLIMIT_NOFILE to the kernel default, so
1845 * that the new systemd can pass the kernel default to
1846 * its child processes */
1847 if (saved_rlimit_nofile.rlim_cur > 0)
1848 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1850 if (switch_root_dir) {
1851 /* Kill all remaining processes from the
1852 * initrd, but don't wait for them, so that we
1853 * can handle the SIGCHLD for them after
1855 broadcast_signal(SIGTERM, false, true);
1857 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1858 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1860 log_error("Failed to switch root, trying to continue: %s", strerror(-r));
1863 args_size = MAX(6, argc+1);
1864 args = newa(const char*, args_size);
1866 if (!switch_root_init) {
1869 /* First try to spawn ourselves with the right
1870 * path, and with full serialization. We do
1871 * this only if the user didn't specify an
1872 * explicit init to spawn. */
1874 assert(arg_serialization);
1877 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1881 args[i++] = SYSTEMD_BINARY_PATH;
1882 if (switch_root_dir)
1883 args[i++] = "--switched-root";
1884 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1885 args[i++] = "--deserialize";
1889 /* do not pass along the environment we inherit from the kernel or initrd */
1890 if (switch_root_dir)
1893 assert(i <= args_size);
1894 execv(args[0], (char* const*) args);
1897 /* Try the fallback, if there is any, without any
1898 * serialization. We pass the original argv[] and
1899 * envp[]. (Well, modulo the ordering changes due to
1900 * getopt() in argv[], and some cleanups in envp[],
1901 * but let's hope that doesn't matter.) */
1903 if (arg_serialization) {
1904 fclose(arg_serialization);
1905 arg_serialization = NULL;
1913 /* Reopen the console */
1914 make_console_stdio();
1916 for (j = 1, i = 1; j < (unsigned) argc; j++)
1917 args[i++] = argv[j];
1919 assert(i <= args_size);
1921 /* Reenable any blocked signals, especially important
1922 * if we switch from initial ramdisk to init=... */
1923 reset_all_signal_handlers();
1924 reset_signal_mask();
1926 if (switch_root_init) {
1927 args[0] = switch_root_init;
1928 execv(args[0], (char* const*) args);
1929 log_warning("Failed to execute configured init, trying fallback: %m");
1932 args[0] = "/sbin/init";
1933 execv(args[0], (char* const*) args);
1935 if (errno == ENOENT) {
1936 log_warning("No /sbin/init, trying fallback");
1938 args[0] = "/bin/sh";
1940 execv(args[0], (char* const*) args);
1941 log_error("Failed to execute /bin/sh, giving up: %m");
1943 log_warning("Failed to execute /sbin/init, giving up: %m");
1946 if (arg_serialization) {
1947 fclose(arg_serialization);
1948 arg_serialization = NULL;
1956 #ifdef HAVE_VALGRIND_VALGRIND_H
1957 /* If we are PID 1 and running under valgrind, then let's exit
1958 * here explicitly. valgrind will only generate nice output on
1959 * exit(), not on exec(), hence let's do the former not the
1961 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1965 if (shutdown_verb) {
1966 char log_level[DECIMAL_STR_MAX(int) + 1];
1967 const char* command_line[9] = {
1968 SYSTEMD_SHUTDOWN_BINARY_PATH,
1970 "--log-level", log_level,
1974 _cleanup_strv_free_ char **env_block = NULL;
1976 assert(command_line[pos] == NULL);
1977 env_block = strv_copy(environ);
1979 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1981 switch (log_get_target()) {
1982 case LOG_TARGET_KMSG:
1983 case LOG_TARGET_JOURNAL_OR_KMSG:
1984 case LOG_TARGET_SYSLOG_OR_KMSG:
1985 command_line[pos++] = "kmsg";
1988 case LOG_TARGET_CONSOLE:
1990 command_line[pos++] = "console";
1994 if (log_get_show_color())
1995 command_line[pos++] = "--log-color";
1997 if (log_get_show_location())
1998 command_line[pos++] = "--log-location";
2000 assert(pos < ELEMENTSOF(command_line));
2002 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2005 /* If we reboot let's set the shutdown
2006 * watchdog and tell the shutdown binary to
2007 * repeatedly ping it */
2008 watchdog_set_timeout(&arg_shutdown_watchdog);
2009 watchdog_close(false);
2011 /* Tell the binary how often to ping, ignore failure */
2012 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2013 strv_push(&env_block, e);
2015 watchdog_close(true);
2017 /* Avoid the creation of new processes forked by the
2018 * kernel; at this point, we will not listen to the
2020 if (detect_container(NULL) <= 0)
2021 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2023 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2024 log_error("Failed to execute shutdown binary, %s: %m",
2025 getpid() == 1 ? "freezing" : "quitting");