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"
57 #include "architecture.h"
59 #include "path-util.h"
60 #include "switch-root.h"
61 #include "capability.h"
66 #include "dbus-manager.h"
67 #include "bus-error.h"
70 #include "mount-setup.h"
71 #include "loopback-setup.h"
72 #include "hostname-setup.h"
73 #include "machine-id-setup.h"
74 #include "selinux-setup.h"
75 #include "ima-setup.h"
76 #include "smack-setup.h"
78 #include "kmod-setup.h"
86 ACTION_DUMP_CONFIGURATION_ITEMS,
88 } arg_action = ACTION_RUN;
89 static char *arg_default_unit = NULL;
90 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
91 static bool arg_dump_core = true;
92 static bool arg_crash_shell = false;
93 static int arg_crash_chvt = -1;
94 static bool arg_confirm_spawn = false;
95 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
96 static bool arg_switched_root = false;
97 static char ***arg_join_controllers = NULL;
98 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
99 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
100 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
101 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
102 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
103 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
104 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
105 static usec_t arg_runtime_watchdog = 0;
106 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
107 static char **arg_default_environment = NULL;
108 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
109 static uint64_t arg_capability_bounding_set_drop = 0;
110 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
111 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
112 static usec_t arg_default_cpu_quota_period_usec = 100 * USEC_PER_MSEC;
113 static Set* arg_syscall_archs = NULL;
114 static FILE* arg_serialization = NULL;
115 static bool arg_default_cpu_accounting = false;
116 static bool arg_default_blockio_accounting = false;
117 static bool arg_default_memory_accounting = false;
119 static void nop_handler(int sig) {}
121 noreturn static void crash(int sig) {
124 /* Pass this on immediately, if this is not PID 1 */
126 else if (!arg_dump_core)
127 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
129 struct sigaction sa = {
130 .sa_handler = nop_handler,
131 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
135 /* We want to wait for the core process, hence let's enable SIGCHLD */
136 sigaction(SIGCHLD, &sa, NULL);
140 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
143 struct rlimit rl = {};
145 /* Enable default signal handler for core dump */
147 sa.sa_handler = SIG_DFL;
148 sigaction(sig, &sa, NULL);
150 /* Don't limit the core dump size */
151 rl.rlim_cur = RLIM_INFINITY;
152 rl.rlim_max = RLIM_INFINITY;
153 setrlimit(RLIMIT_CORE, &rl);
155 /* Just to be sure... */
158 /* Raise the signal again */
161 assert_not_reached("We shouldn't be here...");
168 /* Order things nicely. */
169 r = wait_for_terminate(pid, &status);
171 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
172 else if (status.si_code != CLD_DUMPED)
173 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
175 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
180 chvt(arg_crash_chvt);
182 if (arg_crash_shell) {
183 struct sigaction sa = {
184 .sa_handler = SIG_IGN,
185 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
189 log_info("Executing crash shell in 10s...");
192 /* Let the kernel reap children for us */
193 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
197 log_error("Failed to fork off crash shell: %m");
199 make_console_stdio();
200 execl("/bin/sh", "/bin/sh", NULL);
202 log_error("execl() failed: %m");
206 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
209 log_info("Freezing execution.");
213 static void install_crash_handler(void) {
214 struct sigaction sa = {
216 .sa_flags = SA_NODEFER,
219 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
222 static int console_setup(bool do_reset) {
225 /* If we are init, we connect stdin/stdout/stderr to /dev/null
226 * and make sure we don't have a controlling tty. */
233 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
235 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
239 /* We don't want to force text mode.
240 * plymouth may be showing pictures already from initrd. */
241 r = reset_terminal_fd(tty_fd, false);
243 log_error("Failed to reset /dev/console: %s", strerror(-r));
249 static int set_default_unit(const char *u) {
258 free(arg_default_unit);
259 arg_default_unit = c;
264 static int parse_proc_cmdline_item(const char *key, const char *value) {
266 static const char * const rlmap[] = {
267 "emergency", SPECIAL_EMERGENCY_TARGET,
268 "-b", SPECIAL_EMERGENCY_TARGET,
269 "single", SPECIAL_RESCUE_TARGET,
270 "-s", SPECIAL_RESCUE_TARGET,
271 "s", SPECIAL_RESCUE_TARGET,
272 "S", SPECIAL_RESCUE_TARGET,
273 "1", SPECIAL_RESCUE_TARGET,
274 "2", SPECIAL_RUNLEVEL2_TARGET,
275 "3", SPECIAL_RUNLEVEL3_TARGET,
276 "4", SPECIAL_RUNLEVEL4_TARGET,
277 "5", SPECIAL_RUNLEVEL5_TARGET,
283 if (streq(key, "systemd.unit") && value) {
286 return set_default_unit(value);
288 } else if (streq(key, "rd.systemd.unit") && value) {
290 return set_default_unit(value);
292 } else if (streq(key, "systemd.log_target") && value) {
294 if (log_set_target_from_string(value) < 0)
295 log_warning("Failed to parse log target %s. Ignoring.", value);
297 } else if (streq(key, "systemd.log_level") && value) {
299 if (log_set_max_level_from_string(value) < 0)
300 log_warning("Failed to parse log level %s. Ignoring.", value);
302 } else if (streq(key, "systemd.log_color") && value) {
304 if (log_show_color_from_string(value) < 0)
305 log_warning("Failed to parse log color setting %s. Ignoring.", value);
307 } else if (streq(key, "systemd.log_location") && value) {
309 if (log_show_location_from_string(value) < 0)
310 log_warning("Failed to parse log location setting %s. Ignoring.", value);
312 } else if (streq(key, "systemd.dump_core") && value) {
314 r = parse_boolean(value);
316 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
320 } else if (streq(key, "systemd.crash_shell") && value) {
322 r = parse_boolean(value);
324 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
328 } else if (streq(key, "systemd.crash_chvt") && value) {
330 if (safe_atoi(value, &r) < 0)
331 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
335 } else if (streq(key, "systemd.confirm_spawn") && value) {
337 r = parse_boolean(value);
339 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
341 arg_confirm_spawn = r;
343 } else if (streq(key, "systemd.show_status") && value) {
345 r = parse_show_status(value, &arg_show_status);
347 log_warning("Failed to parse show status switch %s. Ignoring.", value);
349 } else if (streq(key, "systemd.default_standard_output") && value) {
351 r = exec_output_from_string(value);
353 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
355 arg_default_std_output = r;
357 } else if (streq(key, "systemd.default_standard_error") && value) {
359 r = exec_output_from_string(value);
361 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
363 arg_default_std_error = r;
365 } else if (streq(key, "systemd.setenv") && value) {
367 if (env_assignment_is_valid(value)) {
370 env = strv_env_set(arg_default_environment, value);
372 arg_default_environment = env;
374 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
376 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
378 } else if (!streq(key, "systemd.restore_state") &&
379 !streq(key, "systemd.gpt_auto") &&
380 (startswith(key, "systemd.") || startswith(key, "rd.systemd."))) {
384 /* Ignore systemd.journald.xyz and friends */
386 if (startswith(c, "rd."))
388 if (startswith(c, "systemd."))
390 if (c[strcspn(c, ".=")] != '.') {
392 log_warning("Unknown kernel switch %s. Ignoring.", key);
394 log_info("Supported kernel switches:\n"
395 "systemd.unit=UNIT Default unit to start\n"
396 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
397 "systemd.dump_core=0|1 Dump core on crash\n"
398 "systemd.crash_shell=0|1 Run shell on crash\n"
399 "systemd.crash_chvt=N Change to VT #N on crash\n"
400 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
401 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
402 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
404 "systemd.log_level=LEVEL Log level\n"
405 "systemd.log_color=0|1 Highlight important log messages\n"
406 "systemd.log_location=0|1 Include code location in log messages\n"
407 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
408 " Set default log output for services\n"
409 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
410 " Set default log error output for services\n"
411 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n"
412 "systemd.restore_state=0|1 Restore backlight/rfkill state at boot\n");
415 } else if (streq(key, "quiet") && !value) {
416 if (arg_show_status == _SHOW_STATUS_UNSET)
417 arg_show_status = SHOW_STATUS_AUTO;
419 } else if (streq(key, "debug") && !value) {
420 log_set_max_level(LOG_DEBUG);
421 if (detect_container(NULL) > 0)
422 log_set_target(LOG_TARGET_CONSOLE);
424 } else if (!in_initrd() && !value) {
427 /* SysV compatibility */
428 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
429 if (streq(key, rlmap[i]))
430 return set_default_unit(rlmap[i+1]);
436 #define DEFINE_SETTER(name, func, descr) \
437 static int name(const char *unit, \
438 const char *filename, \
440 const char *section, \
441 unsigned section_line, \
442 const char *lvalue, \
444 const char *rvalue, \
456 log_syntax(unit, LOG_ERR, filename, line, -r, \
457 "Invalid " descr "'%s': %s", \
458 rvalue, strerror(-r)); \
463 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
464 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
465 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
466 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
468 static int config_parse_cpu_affinity2(
470 const char *filename,
473 unsigned section_line,
490 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
495 if (!(t = strndup(w, l)))
498 r = safe_atou(t, &cpu);
502 if (!(c = cpu_set_malloc(&ncpus)))
505 if (r < 0 || cpu >= ncpus) {
506 log_syntax(unit, LOG_ERR, filename, line, -r,
507 "Failed to parse CPU affinity '%s'", rvalue);
512 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
516 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
517 log_warning_unit(unit, "Failed to set CPU affinity: %m");
525 static int config_parse_show_status(
527 const char *filename,
530 unsigned section_line,
538 ShowStatus *b = data;
545 k = parse_show_status(rvalue, b);
547 log_syntax(unit, LOG_ERR, filename, line, -k,
548 "Failed to parse show status setting, ignoring: %s", rvalue);
555 static void strv_free_free(char ***l) {
567 static void free_join_controllers(void) {
568 strv_free_free(arg_join_controllers);
569 arg_join_controllers = NULL;
572 static int config_parse_join_controllers(const char *unit,
573 const char *filename,
576 unsigned section_line,
591 free_join_controllers();
593 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
596 s = strndup(w, length);
600 l = strv_split(s, ",");
605 if (strv_length(l) <= 1) {
610 if (!arg_join_controllers) {
611 arg_join_controllers = new(char**, 2);
612 if (!arg_join_controllers) {
617 arg_join_controllers[0] = l;
618 arg_join_controllers[1] = NULL;
625 t = new0(char**, n+2);
633 for (a = arg_join_controllers; *a; a++) {
635 if (strv_overlap(*a, l)) {
636 if (strv_extend_strv(&l, *a) < 0) {
656 t[n++] = strv_uniq(l);
658 strv_free_free(arg_join_controllers);
659 arg_join_controllers = t;
666 static int parse_config_file(void) {
668 const ConfigTableItem items[] = {
669 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
670 { "Manager", "LogTarget", config_parse_target, 0, NULL },
671 { "Manager", "LogColor", config_parse_color, 0, NULL },
672 { "Manager", "LogLocation", config_parse_location, 0, NULL },
673 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
674 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
675 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
676 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
677 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
678 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
679 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
680 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
681 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
683 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
685 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
686 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
687 { "Manager", "DefaultCPUQuotaPeriodSec", config_parse_sec, 0, &arg_default_cpu_quota_period_usec },
688 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
689 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
690 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
691 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
692 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
693 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
694 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
695 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
696 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
697 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
698 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
699 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
700 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
701 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
702 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
703 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
704 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
705 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
706 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
707 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
708 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
709 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
710 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
711 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
712 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
713 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
714 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
718 _cleanup_fclose_ FILE *f;
722 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
728 log_warning("Failed to open configuration file '%s': %m", fn);
732 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
734 log_warning("Failed to parse configuration file: %s", strerror(-r));
739 static int parse_argv(int argc, char *argv[]) {
742 ARG_LOG_LEVEL = 0x100,
751 ARG_DUMP_CONFIGURATION_ITEMS,
758 ARG_DEFAULT_STD_OUTPUT,
759 ARG_DEFAULT_STD_ERROR
762 static const struct option options[] = {
763 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
764 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
765 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
766 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
767 { "unit", required_argument, NULL, ARG_UNIT },
768 { "system", no_argument, NULL, ARG_SYSTEM },
769 { "user", no_argument, NULL, ARG_USER },
770 { "test", no_argument, NULL, ARG_TEST },
771 { "help", no_argument, NULL, 'h' },
772 { "version", no_argument, NULL, ARG_VERSION },
773 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
774 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
775 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
776 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
777 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
778 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
779 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
780 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
781 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
793 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
798 r = log_set_max_level_from_string(optarg);
800 log_error("Failed to parse log level %s.", optarg);
807 r = log_set_target_from_string(optarg);
809 log_error("Failed to parse log target %s.", optarg);
818 r = log_show_color_from_string(optarg);
820 log_error("Failed to parse log color setting %s.", optarg);
824 log_show_color(true);
828 case ARG_LOG_LOCATION:
830 r = log_show_location_from_string(optarg);
832 log_error("Failed to parse log location setting %s.", optarg);
836 log_show_location(true);
840 case ARG_DEFAULT_STD_OUTPUT:
841 r = exec_output_from_string(optarg);
843 log_error("Failed to parse default standard output setting %s.", optarg);
846 arg_default_std_output = r;
849 case ARG_DEFAULT_STD_ERROR:
850 r = exec_output_from_string(optarg);
852 log_error("Failed to parse default standard error output setting %s.", optarg);
855 arg_default_std_error = r;
860 r = set_default_unit(optarg);
862 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
869 arg_running_as = SYSTEMD_SYSTEM;
873 arg_running_as = SYSTEMD_USER;
877 arg_action = ACTION_TEST;
881 arg_action = ACTION_VERSION;
884 case ARG_DUMP_CONFIGURATION_ITEMS:
885 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
889 r = optarg ? parse_boolean(optarg) : 1;
891 log_error("Failed to parse dump core boolean %s.", optarg);
897 case ARG_CRASH_SHELL:
898 r = optarg ? parse_boolean(optarg) : 1;
900 log_error("Failed to parse crash shell boolean %s.", optarg);
906 case ARG_CONFIRM_SPAWN:
907 r = optarg ? parse_boolean(optarg) : 1;
909 log_error("Failed to parse confirm spawn boolean %s.", optarg);
912 arg_confirm_spawn = r;
915 case ARG_SHOW_STATUS:
917 r = parse_show_status(optarg, &arg_show_status);
919 log_error("Failed to parse show status boolean %s.", optarg);
923 arg_show_status = SHOW_STATUS_YES;
926 case ARG_DESERIALIZE: {
930 r = safe_atoi(optarg, &fd);
931 if (r < 0 || fd < 0) {
932 log_error("Failed to parse deserialize option %s.", optarg);
933 return r < 0 ? r : -EINVAL;
936 fd_cloexec(fd, true);
940 log_error("Failed to open serialization fd: %m");
944 if (arg_serialization)
945 fclose(arg_serialization);
947 arg_serialization = f;
952 case ARG_SWITCHED_ROOT:
953 arg_switched_root = true;
957 arg_action = ACTION_HELP;
961 log_set_max_level(LOG_DEBUG);
967 /* Just to eat away the sysvinit kernel
968 * cmdline args without getopt() error
969 * messages that we'll parse in
970 * parse_proc_cmdline_word() or ignore. */
975 log_error("Unknown option code %c", c);
982 if (optind < argc && getpid() != 1) {
983 /* Hmm, when we aren't run as init system
984 * let's complain about excess arguments */
986 log_error("Excess arguments.");
990 if (detect_container(NULL) > 0) {
993 /* All /proc/cmdline arguments the kernel didn't
994 * understand it passed to us. We're not really
995 * interested in that usually since /proc/cmdline is
996 * more interesting and complete. With one exception:
997 * if we are run in a container /proc/cmdline is not
998 * relevant for the container, hence we rely on argv[]
1001 for (a = argv; a < argv + argc; a++) {
1002 _cleanup_free_ char *w;
1009 value = strchr(w, '=');
1013 r = parse_proc_cmdline_item(w, value);
1015 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1024 static int help(void) {
1026 printf("%s [OPTIONS...]\n\n"
1027 "Starts up and maintains the system or user services.\n\n"
1028 " -h --help Show this help\n"
1029 " --test Determine startup sequence, dump it and exit\n"
1030 " --dump-configuration-items Dump understood unit configuration items\n"
1031 " --unit=UNIT Set default unit\n"
1032 " --system Run a system instance, even if PID != 1\n"
1033 " --user Run a user instance\n"
1034 " --dump-core[=0|1] Dump core on crash\n"
1035 " --crash-shell[=0|1] Run shell on crash\n"
1036 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1037 " --show-status[=0|1] Show status updates on the console during bootup\n"
1038 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1039 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1040 " --log-color[=0|1] Highlight important log messages\n"
1041 " --log-location[=0|1] Include code location in log messages\n"
1042 " --default-standard-output= Set default standard output for services\n"
1043 " --default-standard-error= Set default standard error output for services\n",
1044 program_invocation_short_name);
1049 static int version(void) {
1050 puts(PACKAGE_STRING);
1051 puts(SYSTEMD_FEATURES);
1056 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1065 r = manager_open_serialization(m, &f);
1067 log_error("Failed to create serialization file: %s", strerror(-r));
1071 /* Make sure nothing is really destructed when we shut down */
1073 bus_manager_send_reloading(m, true);
1078 log_error("Failed to allocate fd set: %s", strerror(-r));
1082 r = manager_serialize(m, f, fds, switching_root);
1084 log_error("Failed to serialize state: %s", strerror(-r));
1088 if (fseeko(f, 0, SEEK_SET) < 0) {
1089 log_error("Failed to rewind serialization fd: %m");
1093 r = fd_cloexec(fileno(f), false);
1095 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1099 r = fdset_cloexec(fds, false);
1101 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1119 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1123 assert(saved_rlimit);
1125 /* Save the original RLIMIT_NOFILE so that we can reset it
1126 * later when transitioning from the initrd to the main
1127 * systemd or suchlike. */
1128 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1129 log_error("Reading RLIMIT_NOFILE failed: %m");
1133 /* Make sure forked processes get the default kernel setting */
1134 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1137 rl = newdup(struct rlimit, saved_rlimit, 1);
1141 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1144 /* Bump up the resource limit for ourselves substantially */
1145 nl.rlim_cur = nl.rlim_max = 64*1024;
1146 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1148 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1155 static void test_mtab(void) {
1158 /* Check that /etc/mtab is a symlink */
1160 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1163 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1170 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1171 "This is not supported anymore. "
1172 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1175 static void test_usr(void) {
1177 /* Check that /usr is not a separate fs */
1179 if (dir_is_empty("/usr") <= 0)
1182 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1183 "Some things will probably break (sometimes even silently) in mysterious ways. "
1184 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1187 static int initialize_join_controllers(void) {
1188 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1189 * + "net_prio". We'd like to add "cpuset" to the mix, but
1190 * "cpuset" does't really work for groups with no initialized
1193 arg_join_controllers = new(char**, 3);
1194 if (!arg_join_controllers)
1197 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1198 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1199 arg_join_controllers[2] = NULL;
1201 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1202 free_join_controllers();
1209 static int enforce_syscall_archs(Set *archs) {
1211 scmp_filter_ctx *seccomp;
1216 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1220 SET_FOREACH(id, arg_syscall_archs, i) {
1221 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1225 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1230 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1232 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1236 r = seccomp_load(seccomp);
1238 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1241 seccomp_release(seccomp);
1248 static int status_welcome(void) {
1249 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1252 r = parse_env_file("/etc/os-release", NEWLINE,
1253 "PRETTY_NAME", &pretty_name,
1254 "ANSI_COLOR", &ansi_color,
1257 if (r < 0 && r != -ENOENT)
1258 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
1260 return status_printf(NULL, false, false,
1261 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1262 isempty(ansi_color) ? "1" : ansi_color,
1263 isempty(pretty_name) ? "Linux" : pretty_name);
1266 int main(int argc, char *argv[]) {
1268 int r, retval = EXIT_FAILURE;
1269 usec_t before_startup, after_startup;
1270 char timespan[FORMAT_TIMESPAN_MAX];
1272 bool reexecute = false;
1273 const char *shutdown_verb = NULL;
1274 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1275 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1276 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1277 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1278 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1279 static char systemd[] = "systemd";
1280 bool skip_setup = false;
1282 bool loaded_policy = false;
1283 bool arm_reboot_watchdog = false;
1284 bool queue_default_job = false;
1285 char *switch_root_dir = NULL, *switch_root_init = NULL;
1286 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1288 #ifdef HAVE_SYSV_COMPAT
1289 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1290 /* This is compatibility support for SysV, where
1291 * calling init as a user is identical to telinit. */
1294 execv(SYSTEMCTL_BINARY_PATH, argv);
1295 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1300 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1301 dual_timestamp_get(&userspace_timestamp);
1303 /* Determine if this is a reexecution or normal bootup. We do
1304 * the full command line parsing much later, so let's just
1305 * have a quick peek here. */
1306 if (strv_find(argv+1, "--deserialize"))
1309 /* If we have switched root, do all the special setup
1311 if (strv_find(argv+1, "--switched-root"))
1314 /* If we get started via the /sbin/init symlink then we are
1315 called 'init'. After a subsequent reexecution we are then
1316 called 'systemd'. That is confusing, hence let's call us
1317 systemd right-away. */
1318 program_invocation_short_name = systemd;
1319 prctl(PR_SET_NAME, systemd);
1324 log_show_color(isatty(STDERR_FILENO) > 0);
1326 /* Disable the umask logic */
1330 if (getpid() == 1 && detect_container(NULL) <= 0) {
1332 /* Running outside of a container as PID 1 */
1333 arg_running_as = SYSTEMD_SYSTEM;
1335 log_set_target(LOG_TARGET_KMSG);
1339 initrd_timestamp = userspace_timestamp;
1342 mount_setup_early();
1343 dual_timestamp_get(&security_start_timestamp);
1344 if (selinux_setup(&loaded_policy) < 0)
1346 if (ima_setup() < 0)
1348 if (smack_setup(&loaded_policy) < 0)
1350 dual_timestamp_get(&security_finish_timestamp);
1353 if (label_init(NULL) < 0)
1357 if (hwclock_is_localtime() > 0) {
1360 /* The first-time call to settimeofday() does a time warp in the kernel */
1361 r = hwclock_set_timezone(&min);
1363 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1365 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1366 } else if (!in_initrd()) {
1368 * Do dummy first-time call to seal the kernel's time warp magic
1370 * Do not call this this from inside the initrd. The initrd might not
1371 * carry /etc/adjtime with LOCAL, but the real system could be set up
1372 * that way. In such case, we need to delay the time-warp or the sealing
1373 * until we reach the real system.
1375 hwclock_reset_timezone();
1377 /* Tell the kernel our timezone */
1378 r = hwclock_set_timezone(NULL);
1380 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1384 /* Set the default for later on, but don't actually
1385 * open the logs like this for now. Note that if we
1386 * are transitioning from the initrd there might still
1387 * be journal fd open, and we shouldn't attempt
1388 * opening that before we parsed /proc/cmdline which
1389 * might redirect output elsewhere. */
1390 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1392 } else if (getpid() == 1) {
1393 /* Running inside a container, as PID 1 */
1394 arg_running_as = SYSTEMD_SYSTEM;
1395 log_set_target(LOG_TARGET_CONSOLE);
1396 log_close_console(); /* force reopen of /dev/console */
1399 /* For the later on, see above... */
1400 log_set_target(LOG_TARGET_JOURNAL);
1402 /* clear the kernel timestamp,
1403 * because we are in a container */
1404 kernel_timestamp.monotonic = 0ULL;
1405 kernel_timestamp.realtime = 0ULL;
1408 /* Running as user instance */
1409 arg_running_as = SYSTEMD_USER;
1410 log_set_target(LOG_TARGET_AUTO);
1413 /* clear the kernel timestamp,
1414 * because we are not PID 1 */
1415 kernel_timestamp.monotonic = 0ULL;
1416 kernel_timestamp.realtime = 0ULL;
1419 /* Initialize default unit */
1420 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1422 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1426 r = initialize_join_controllers();
1430 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1431 * /proc/$PID/fd is available. */
1432 if (getpid() == 1) {
1433 r = mount_setup(loaded_policy);
1438 /* Reset all signal handlers. */
1439 assert_se(reset_all_signal_handlers() == 0);
1441 ignore_signals(SIGNALS_IGNORE, -1);
1443 if (parse_config_file() < 0)
1446 if (arg_running_as == SYSTEMD_SYSTEM)
1447 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1450 log_parse_environment();
1452 if (parse_argv(argc, argv) < 0)
1455 if (arg_action == ACTION_TEST &&
1457 log_error("Don't run test mode as root.");
1461 if (arg_running_as == SYSTEMD_USER &&
1462 arg_action == ACTION_RUN &&
1464 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1468 if (arg_running_as == SYSTEMD_SYSTEM &&
1469 arg_action == ACTION_RUN &&
1470 running_in_chroot() > 0) {
1471 log_error("Cannot be run in a chroot() environment.");
1475 if (arg_action == ACTION_HELP) {
1478 } else if (arg_action == ACTION_VERSION) {
1481 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1482 unit_dump_config_items(stdout);
1483 retval = EXIT_SUCCESS;
1485 } else if (arg_action == ACTION_DONE) {
1486 retval = EXIT_SUCCESS;
1490 if (arg_running_as == SYSTEMD_USER &&
1491 !getenv("XDG_RUNTIME_DIR")) {
1492 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1496 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1498 /* Close logging fds, in order not to confuse fdset below */
1501 /* Remember open file descriptors for later deserialization */
1502 r = fdset_new_fill(&fds);
1504 log_error("Failed to allocate fd set: %s", strerror(-r));
1507 fdset_cloexec(fds, true);
1509 if (arg_serialization)
1510 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1512 if (arg_running_as == SYSTEMD_SYSTEM)
1513 /* Become a session leader if we aren't one yet. */
1516 /* Move out of the way, so that we won't block unmounts */
1517 assert_se(chdir("/") == 0);
1519 /* Reset the console, but only if this is really init and we
1520 * are freshly booted */
1521 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1522 console_setup(getpid() == 1 && !skip_setup);
1524 /* Open the logging devices, if possible and necessary */
1527 if (arg_show_status == _SHOW_STATUS_UNSET)
1528 arg_show_status = SHOW_STATUS_YES;
1530 /* Make sure we leave a core dump without panicing the
1532 if (getpid() == 1) {
1533 install_crash_handler();
1535 r = mount_cgroup_controllers(arg_join_controllers);
1540 if (arg_running_as == SYSTEMD_SYSTEM) {
1541 const char *virtualization = NULL;
1543 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1545 detect_virtualization(&virtualization);
1547 log_info("Detected virtualization '%s'.", virtualization);
1549 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1552 log_info("Running in initial RAM disk.");
1555 _cleanup_free_ char *t = uid_to_name(getuid());
1556 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1560 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1561 if (arg_show_status > 0 || plymouth_running())
1565 if (detect_container(NULL) <= 0)
1569 machine_id_setup("");
1576 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1577 watchdog_set_timeout(&arg_runtime_watchdog);
1579 if (arg_timer_slack_nsec != (nsec_t) -1)
1580 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1581 log_error("Failed to adjust timer slack: %m");
1583 if (arg_capability_bounding_set_drop) {
1584 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1586 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1589 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1591 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1596 if (arg_syscall_archs) {
1597 r = enforce_syscall_archs(arg_syscall_archs);
1602 if (arg_running_as == SYSTEMD_USER) {
1603 /* Become reaper of our children */
1604 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1605 log_warning("Failed to make us a subreaper: %m");
1606 if (errno == EINVAL)
1607 log_info("Perhaps the kernel version is too old (< 3.4?)");
1611 if (arg_running_as == SYSTEMD_SYSTEM)
1612 bump_rlimit_nofile(&saved_rlimit_nofile);
1614 r = manager_new(arg_running_as, &m);
1616 log_error("Failed to allocate manager object: %s", strerror(-r));
1620 m->confirm_spawn = arg_confirm_spawn;
1621 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1622 m->default_cpu_quota_period_usec = arg_default_cpu_quota_period_usec;
1623 m->default_std_output = arg_default_std_output;
1624 m->default_std_error = arg_default_std_error;
1625 m->default_restart_usec = arg_default_restart_usec;
1626 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1627 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1628 m->default_start_limit_interval = arg_default_start_limit_interval;
1629 m->default_start_limit_burst = arg_default_start_limit_burst;
1630 m->default_cpu_accounting = arg_default_cpu_accounting;
1631 m->default_blockio_accounting = arg_default_blockio_accounting;
1632 m->default_memory_accounting = arg_default_memory_accounting;
1633 m->runtime_watchdog = arg_runtime_watchdog;
1634 m->shutdown_watchdog = arg_shutdown_watchdog;
1635 m->userspace_timestamp = userspace_timestamp;
1636 m->kernel_timestamp = kernel_timestamp;
1637 m->initrd_timestamp = initrd_timestamp;
1638 m->security_start_timestamp = security_start_timestamp;
1639 m->security_finish_timestamp = security_finish_timestamp;
1641 manager_set_default_rlimits(m, arg_default_rlimit);
1642 manager_environment_add(m, NULL, arg_default_environment);
1643 manager_set_show_status(m, arg_show_status);
1645 /* Remember whether we should queue the default job */
1646 queue_default_job = !arg_serialization || arg_switched_root;
1648 before_startup = now(CLOCK_MONOTONIC);
1650 r = manager_startup(m, arg_serialization, fds);
1652 log_error("Failed to fully start up daemon: %s", strerror(-r));
1654 /* This will close all file descriptors that were opened, but
1655 * not claimed by any unit. */
1659 if (arg_serialization) {
1660 fclose(arg_serialization);
1661 arg_serialization = NULL;
1664 if (queue_default_job) {
1665 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1666 Unit *target = NULL;
1667 Job *default_unit_job;
1669 log_debug("Activating default unit: %s", arg_default_unit);
1671 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1673 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1674 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1675 log_error("Failed to load default target: %s", strerror(-target->load_error));
1676 else if (target->load_state == UNIT_MASKED)
1677 log_error("Default target masked.");
1679 if (!target || target->load_state != UNIT_LOADED) {
1680 log_info("Trying to load rescue target...");
1682 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1684 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1686 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1687 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1689 } else if (target->load_state == UNIT_MASKED) {
1690 log_error("Rescue target masked.");
1695 assert(target->load_state == UNIT_LOADED);
1697 if (arg_action == ACTION_TEST) {
1698 printf("-> By units:\n");
1699 manager_dump_units(m, stdout, "\t");
1702 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1704 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1706 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1708 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1712 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1716 m->default_unit_job_id = default_unit_job->id;
1718 after_startup = now(CLOCK_MONOTONIC);
1719 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1720 "Loaded units and determined initial transaction in %s.",
1721 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1723 if (arg_action == ACTION_TEST) {
1724 printf("-> By jobs:\n");
1725 manager_dump_jobs(m, stdout, "\t");
1726 retval = EXIT_SUCCESS;
1732 r = manager_loop(m);
1734 log_error("Failed to run mainloop: %s", strerror(-r));
1738 switch (m->exit_code) {
1741 retval = EXIT_SUCCESS;
1745 case MANAGER_RELOAD:
1746 log_info("Reloading.");
1747 r = manager_reload(m);
1749 log_error("Failed to reload: %s", strerror(-r));
1752 case MANAGER_REEXECUTE:
1754 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1758 log_notice("Reexecuting.");
1761 case MANAGER_SWITCH_ROOT:
1762 /* Steal the switch root parameters */
1763 switch_root_dir = m->switch_root;
1764 switch_root_init = m->switch_root_init;
1765 m->switch_root = m->switch_root_init = NULL;
1767 if (!switch_root_init)
1768 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1772 log_notice("Switching root.");
1775 case MANAGER_REBOOT:
1776 case MANAGER_POWEROFF:
1778 case MANAGER_KEXEC: {
1779 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1780 [MANAGER_REBOOT] = "reboot",
1781 [MANAGER_POWEROFF] = "poweroff",
1782 [MANAGER_HALT] = "halt",
1783 [MANAGER_KEXEC] = "kexec"
1786 assert_se(shutdown_verb = table[m->exit_code]);
1787 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1789 log_notice("Shutting down.");
1794 assert_not_reached("Unknown exit code.");
1804 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1805 free(arg_default_rlimit[j]);
1806 arg_default_rlimit[j] = NULL;
1809 free(arg_default_unit);
1810 arg_default_unit = NULL;
1812 free_join_controllers();
1814 strv_free(arg_default_environment);
1815 arg_default_environment = NULL;
1817 set_free(arg_syscall_archs);
1818 arg_syscall_archs = NULL;
1824 unsigned i, args_size;
1826 /* Close and disarm the watchdog, so that the new
1827 * instance can reinitialize it, but doesn't get
1828 * rebooted while we do that */
1829 watchdog_close(true);
1831 /* Reset the RLIMIT_NOFILE to the kernel default, so
1832 * that the new systemd can pass the kernel default to
1833 * its child processes */
1834 if (saved_rlimit_nofile.rlim_cur > 0)
1835 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1837 if (switch_root_dir) {
1838 /* Kill all remaining processes from the
1839 * initrd, but don't wait for them, so that we
1840 * can handle the SIGCHLD for them after
1842 broadcast_signal(SIGTERM, false, true);
1844 /* And switch root */
1845 r = switch_root(switch_root_dir);
1847 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1850 args_size = MAX(6, argc+1);
1851 args = newa(const char*, args_size);
1853 if (!switch_root_init) {
1856 /* First try to spawn ourselves with the right
1857 * path, and with full serialization. We do
1858 * this only if the user didn't specify an
1859 * explicit init to spawn. */
1861 assert(arg_serialization);
1864 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1868 args[i++] = SYSTEMD_BINARY_PATH;
1869 if (switch_root_dir)
1870 args[i++] = "--switched-root";
1871 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1872 args[i++] = "--deserialize";
1876 /* do not pass along the environment we inherit from the kernel or initrd */
1877 if (switch_root_dir)
1880 assert(i <= args_size);
1881 execv(args[0], (char* const*) args);
1884 /* Try the fallback, if there is any, without any
1885 * serialization. We pass the original argv[] and
1886 * envp[]. (Well, modulo the ordering changes due to
1887 * getopt() in argv[], and some cleanups in envp[],
1888 * but let's hope that doesn't matter.) */
1890 if (arg_serialization) {
1891 fclose(arg_serialization);
1892 arg_serialization = NULL;
1900 /* Reopen the console */
1901 make_console_stdio();
1903 for (j = 1, i = 1; j < (unsigned) argc; j++)
1904 args[i++] = argv[j];
1906 assert(i <= args_size);
1908 if (switch_root_init) {
1909 args[0] = switch_root_init;
1910 execv(args[0], (char* const*) args);
1911 log_warning("Failed to execute configured init, trying fallback: %m");
1914 args[0] = "/sbin/init";
1915 execv(args[0], (char* const*) args);
1917 if (errno == ENOENT) {
1918 log_warning("No /sbin/init, trying fallback");
1920 args[0] = "/bin/sh";
1922 execv(args[0], (char* const*) args);
1923 log_error("Failed to execute /bin/sh, giving up: %m");
1925 log_warning("Failed to execute /sbin/init, giving up: %m");
1928 if (arg_serialization) {
1929 fclose(arg_serialization);
1930 arg_serialization = NULL;
1938 #ifdef HAVE_VALGRIND_VALGRIND_H
1939 /* If we are PID 1 and running under valgrind, then let's exit
1940 * here explicitly. valgrind will only generate nice output on
1941 * exit(), not on exec(), hence let's do the former not the
1943 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1947 if (shutdown_verb) {
1948 char log_level[DECIMAL_STR_MAX(int) + 1];
1949 const char* command_line[9] = {
1950 SYSTEMD_SHUTDOWN_BINARY_PATH,
1952 "--log-level", log_level,
1956 _cleanup_strv_free_ char **env_block = NULL;
1958 assert(command_line[pos] == NULL);
1959 env_block = strv_copy(environ);
1961 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1963 switch (log_get_target()) {
1964 case LOG_TARGET_KMSG:
1965 case LOG_TARGET_JOURNAL_OR_KMSG:
1966 case LOG_TARGET_SYSLOG_OR_KMSG:
1967 command_line[pos++] = "kmsg";
1970 case LOG_TARGET_CONSOLE:
1972 command_line[pos++] = "console";
1976 if (log_get_show_color())
1977 command_line[pos++] = "--log-color";
1979 if (log_get_show_location())
1980 command_line[pos++] = "--log-location";
1982 assert(pos < ELEMENTSOF(command_line));
1984 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1987 /* If we reboot let's set the shutdown
1988 * watchdog and tell the shutdown binary to
1989 * repeatedly ping it */
1990 watchdog_set_timeout(&arg_shutdown_watchdog);
1991 watchdog_close(false);
1993 /* Tell the binary how often to ping, ignore failure */
1994 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
1995 strv_push(&env_block, e);
1997 watchdog_close(true);
1999 /* Avoid the creation of new processes forked by the
2000 * kernel; at this point, we will not listen to the
2002 if (detect_container(NULL) <= 0)
2003 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2005 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2006 log_error("Failed to execute shutdown binary, %s: %m",
2007 getpid() == 1 ? "freezing" : "quitting");