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"
64 #include "clock-util.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 Set* arg_syscall_archs = NULL;
113 static FILE* arg_serialization = NULL;
114 static bool arg_default_cpu_accounting = false;
115 static bool arg_default_blockio_accounting = false;
116 static bool arg_default_memory_accounting = false;
118 static void nop_handler(int sig) {}
120 noreturn static void crash(int sig) {
123 /* Pass this on immediately, if this is not PID 1 */
125 else if (!arg_dump_core)
126 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
128 struct sigaction sa = {
129 .sa_handler = nop_handler,
130 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
134 /* We want to wait for the core process, hence let's enable SIGCHLD */
135 sigaction(SIGCHLD, &sa, NULL);
139 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
142 struct rlimit rl = {};
144 /* Enable default signal handler for core dump */
146 sa.sa_handler = SIG_DFL;
147 sigaction(sig, &sa, NULL);
149 /* Don't limit the core dump size */
150 rl.rlim_cur = RLIM_INFINITY;
151 rl.rlim_max = RLIM_INFINITY;
152 setrlimit(RLIMIT_CORE, &rl);
154 /* Just to be sure... */
157 /* Raise the signal again */
160 assert_not_reached("We shouldn't be here...");
167 /* Order things nicely. */
168 r = wait_for_terminate(pid, &status);
170 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
171 else if (status.si_code != CLD_DUMPED)
172 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
174 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
179 chvt(arg_crash_chvt);
181 if (arg_crash_shell) {
182 struct sigaction sa = {
183 .sa_handler = SIG_IGN,
184 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
188 log_info("Executing crash shell in 10s...");
191 /* Let the kernel reap children for us */
192 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
196 log_error("Failed to fork off crash shell: %m");
198 make_console_stdio();
199 execl("/bin/sh", "/bin/sh", NULL);
201 log_error("execl() failed: %m");
205 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
208 log_info("Freezing execution.");
212 static void install_crash_handler(void) {
213 struct sigaction sa = {
215 .sa_flags = SA_NODEFER,
218 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
221 static int console_setup(bool do_reset) {
224 /* If we are init, we connect stdin/stdout/stderr to /dev/null
225 * and make sure we don't have a controlling tty. */
232 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
234 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
238 /* We don't want to force text mode.
239 * plymouth may be showing pictures already from initrd. */
240 r = reset_terminal_fd(tty_fd, false);
242 log_error("Failed to reset /dev/console: %s", strerror(-r));
248 static int set_default_unit(const char *u) {
257 free(arg_default_unit);
258 arg_default_unit = c;
263 static int parse_proc_cmdline_item(const char *key, const char *value) {
265 static const char * const rlmap[] = {
266 "emergency", SPECIAL_EMERGENCY_TARGET,
267 "-b", SPECIAL_EMERGENCY_TARGET,
268 "single", SPECIAL_RESCUE_TARGET,
269 "-s", SPECIAL_RESCUE_TARGET,
270 "s", SPECIAL_RESCUE_TARGET,
271 "S", SPECIAL_RESCUE_TARGET,
272 "1", SPECIAL_RESCUE_TARGET,
273 "2", SPECIAL_RUNLEVEL2_TARGET,
274 "3", SPECIAL_RUNLEVEL3_TARGET,
275 "4", SPECIAL_RUNLEVEL4_TARGET,
276 "5", SPECIAL_RUNLEVEL5_TARGET,
282 if (streq(key, "systemd.unit") && value) {
285 return set_default_unit(value);
287 } else if (streq(key, "rd.systemd.unit") && value) {
289 return set_default_unit(value);
291 } else if (streq(key, "systemd.log_target") && value) {
293 if (log_set_target_from_string(value) < 0)
294 log_warning("Failed to parse log target %s. Ignoring.", value);
296 } else if (streq(key, "systemd.log_level") && value) {
298 if (log_set_max_level_from_string(value) < 0)
299 log_warning("Failed to parse log level %s. Ignoring.", value);
301 } else if (streq(key, "systemd.log_color") && value) {
303 if (log_show_color_from_string(value) < 0)
304 log_warning("Failed to parse log color setting %s. Ignoring.", value);
306 } else if (streq(key, "systemd.log_location") && value) {
308 if (log_show_location_from_string(value) < 0)
309 log_warning("Failed to parse log location setting %s. Ignoring.", value);
311 } else if (streq(key, "systemd.dump_core") && value) {
313 r = parse_boolean(value);
315 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
319 } else if (streq(key, "systemd.crash_shell") && value) {
321 r = parse_boolean(value);
323 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
327 } else if (streq(key, "systemd.crash_chvt") && value) {
329 if (safe_atoi(value, &r) < 0)
330 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
334 } else if (streq(key, "systemd.confirm_spawn") && value) {
336 r = parse_boolean(value);
338 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
340 arg_confirm_spawn = r;
342 } else if (streq(key, "systemd.show_status") && value) {
344 r = parse_show_status(value, &arg_show_status);
346 log_warning("Failed to parse show status switch %s. Ignoring.", value);
348 } else if (streq(key, "systemd.default_standard_output") && value) {
350 r = exec_output_from_string(value);
352 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
354 arg_default_std_output = r;
356 } else if (streq(key, "systemd.default_standard_error") && value) {
358 r = exec_output_from_string(value);
360 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
362 arg_default_std_error = r;
364 } else if (streq(key, "systemd.setenv") && value) {
366 if (env_assignment_is_valid(value)) {
369 env = strv_env_set(arg_default_environment, value);
371 arg_default_environment = env;
373 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
375 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
377 } else if (!streq(key, "systemd.restore_state") &&
378 !streq(key, "systemd.gpt_auto") &&
379 (startswith(key, "systemd.") || startswith(key, "rd.systemd."))) {
383 /* Ignore systemd.journald.xyz and friends */
385 if (startswith(c, "rd."))
387 if (startswith(c, "systemd."))
389 if (c[strcspn(c, ".=")] != '.') {
391 log_warning("Unknown kernel switch %s. Ignoring.", key);
393 log_info("Supported kernel switches:\n"
394 "systemd.unit=UNIT Default unit to start\n"
395 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
396 "systemd.dump_core=0|1 Dump core on crash\n"
397 "systemd.crash_shell=0|1 Run shell on crash\n"
398 "systemd.crash_chvt=N Change to VT #N on crash\n"
399 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
400 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
401 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
403 "systemd.log_level=LEVEL Log level\n"
404 "systemd.log_color=0|1 Highlight important log messages\n"
405 "systemd.log_location=0|1 Include code location in log messages\n"
406 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
407 " Set default log output for services\n"
408 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
409 " Set default log error output for services\n"
410 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n"
411 "systemd.restore_state=0|1 Restore backlight/rfkill state at boot\n");
414 } else if (streq(key, "quiet") && !value) {
416 log_set_max_level(LOG_NOTICE);
418 if (arg_show_status == _SHOW_STATUS_UNSET)
419 arg_show_status = SHOW_STATUS_AUTO;
421 } else if (streq(key, "debug") && !value) {
423 log_set_max_level(LOG_DEBUG);
425 if (detect_container(NULL) > 0)
426 log_set_target(LOG_TARGET_CONSOLE);
428 } else if (!in_initrd() && !value) {
431 /* SysV compatibility */
432 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
433 if (streq(key, rlmap[i]))
434 return set_default_unit(rlmap[i+1]);
440 #define DEFINE_SETTER(name, func, descr) \
441 static int name(const char *unit, \
442 const char *filename, \
444 const char *section, \
445 unsigned section_line, \
446 const char *lvalue, \
448 const char *rvalue, \
460 log_syntax(unit, LOG_ERR, filename, line, -r, \
461 "Invalid " descr "'%s': %s", \
462 rvalue, strerror(-r)); \
467 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
468 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
469 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
470 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
472 static int config_parse_cpu_affinity2(
474 const char *filename,
477 unsigned section_line,
494 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
499 if (!(t = strndup(w, l)))
502 r = safe_atou(t, &cpu);
506 if (!(c = cpu_set_malloc(&ncpus)))
509 if (r < 0 || cpu >= ncpus) {
510 log_syntax(unit, LOG_ERR, filename, line, -r,
511 "Failed to parse CPU affinity '%s'", rvalue);
516 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
520 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
521 log_warning_unit(unit, "Failed to set CPU affinity: %m");
529 static int config_parse_show_status(
531 const char *filename,
534 unsigned section_line,
542 ShowStatus *b = data;
549 k = parse_show_status(rvalue, b);
551 log_syntax(unit, LOG_ERR, filename, line, -k,
552 "Failed to parse show status setting, ignoring: %s", rvalue);
559 static void strv_free_free(char ***l) {
571 static void free_join_controllers(void) {
572 strv_free_free(arg_join_controllers);
573 arg_join_controllers = NULL;
576 static int config_parse_join_controllers(const char *unit,
577 const char *filename,
580 unsigned section_line,
595 free_join_controllers();
597 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
600 s = strndup(w, length);
604 l = strv_split(s, ",");
609 if (strv_length(l) <= 1) {
614 if (!arg_join_controllers) {
615 arg_join_controllers = new(char**, 2);
616 if (!arg_join_controllers) {
621 arg_join_controllers[0] = l;
622 arg_join_controllers[1] = NULL;
629 t = new0(char**, n+2);
637 for (a = arg_join_controllers; *a; a++) {
639 if (strv_overlap(*a, l)) {
640 if (strv_extend_strv(&l, *a) < 0) {
660 t[n++] = strv_uniq(l);
662 strv_free_free(arg_join_controllers);
663 arg_join_controllers = t;
670 static int parse_config_file(void) {
672 const ConfigTableItem items[] = {
673 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
674 { "Manager", "LogTarget", config_parse_target, 0, NULL },
675 { "Manager", "LogColor", config_parse_color, 0, NULL },
676 { "Manager", "LogLocation", config_parse_location, 0, NULL },
677 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
678 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
679 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
680 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
681 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
682 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
683 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
684 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
685 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
687 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
689 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
690 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
691 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
692 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
693 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
694 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
695 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
696 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
697 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
698 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
699 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
700 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
701 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
702 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
703 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
704 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
705 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
706 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
707 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
708 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
709 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
710 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
711 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
712 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
713 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
714 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
715 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
716 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
717 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
721 _cleanup_fclose_ FILE *f;
725 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
731 log_warning("Failed to open configuration file '%s': %m", fn);
735 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
737 log_warning("Failed to parse configuration file: %s", strerror(-r));
742 static int parse_argv(int argc, char *argv[]) {
745 ARG_LOG_LEVEL = 0x100,
754 ARG_DUMP_CONFIGURATION_ITEMS,
761 ARG_DEFAULT_STD_OUTPUT,
762 ARG_DEFAULT_STD_ERROR
765 static const struct option options[] = {
766 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
767 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
768 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
769 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
770 { "unit", required_argument, NULL, ARG_UNIT },
771 { "system", no_argument, NULL, ARG_SYSTEM },
772 { "user", no_argument, NULL, ARG_USER },
773 { "test", no_argument, NULL, ARG_TEST },
774 { "help", no_argument, NULL, 'h' },
775 { "version", no_argument, NULL, ARG_VERSION },
776 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
777 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
778 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
779 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
780 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
781 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
782 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
783 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
784 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
796 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
801 r = log_set_max_level_from_string(optarg);
803 log_error("Failed to parse log level %s.", optarg);
810 r = log_set_target_from_string(optarg);
812 log_error("Failed to parse log target %s.", optarg);
821 r = log_show_color_from_string(optarg);
823 log_error("Failed to parse log color setting %s.", optarg);
827 log_show_color(true);
831 case ARG_LOG_LOCATION:
833 r = log_show_location_from_string(optarg);
835 log_error("Failed to parse log location setting %s.", optarg);
839 log_show_location(true);
843 case ARG_DEFAULT_STD_OUTPUT:
844 r = exec_output_from_string(optarg);
846 log_error("Failed to parse default standard output setting %s.", optarg);
849 arg_default_std_output = r;
852 case ARG_DEFAULT_STD_ERROR:
853 r = exec_output_from_string(optarg);
855 log_error("Failed to parse default standard error output setting %s.", optarg);
858 arg_default_std_error = r;
863 r = set_default_unit(optarg);
865 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
872 arg_running_as = SYSTEMD_SYSTEM;
876 arg_running_as = SYSTEMD_USER;
880 arg_action = ACTION_TEST;
884 arg_action = ACTION_VERSION;
887 case ARG_DUMP_CONFIGURATION_ITEMS:
888 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
892 r = optarg ? parse_boolean(optarg) : 1;
894 log_error("Failed to parse dump core boolean %s.", optarg);
900 case ARG_CRASH_SHELL:
901 r = optarg ? parse_boolean(optarg) : 1;
903 log_error("Failed to parse crash shell boolean %s.", optarg);
909 case ARG_CONFIRM_SPAWN:
910 r = optarg ? parse_boolean(optarg) : 1;
912 log_error("Failed to parse confirm spawn boolean %s.", optarg);
915 arg_confirm_spawn = r;
918 case ARG_SHOW_STATUS:
920 r = parse_show_status(optarg, &arg_show_status);
922 log_error("Failed to parse show status boolean %s.", optarg);
926 arg_show_status = SHOW_STATUS_YES;
929 case ARG_DESERIALIZE: {
933 r = safe_atoi(optarg, &fd);
934 if (r < 0 || fd < 0) {
935 log_error("Failed to parse deserialize option %s.", optarg);
936 return r < 0 ? r : -EINVAL;
939 fd_cloexec(fd, true);
943 log_error("Failed to open serialization fd: %m");
947 if (arg_serialization)
948 fclose(arg_serialization);
950 arg_serialization = f;
955 case ARG_SWITCHED_ROOT:
956 arg_switched_root = true;
960 arg_action = ACTION_HELP;
964 log_set_max_level(LOG_DEBUG);
970 /* Just to eat away the sysvinit kernel
971 * cmdline args without getopt() error
972 * messages that we'll parse in
973 * parse_proc_cmdline_word() or ignore. */
978 log_error("Unknown option code %c", c);
985 if (optind < argc && getpid() != 1) {
986 /* Hmm, when we aren't run as init system
987 * let's complain about excess arguments */
989 log_error("Excess arguments.");
993 if (detect_container(NULL) > 0) {
996 /* All /proc/cmdline arguments the kernel didn't
997 * understand it passed to us. We're not really
998 * interested in that usually since /proc/cmdline is
999 * more interesting and complete. With one exception:
1000 * if we are run in a container /proc/cmdline is not
1001 * relevant for the container, hence we rely on argv[]
1004 for (a = argv; a < argv + argc; a++) {
1005 _cleanup_free_ char *w;
1012 value = strchr(w, '=');
1016 r = parse_proc_cmdline_item(w, value);
1018 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1027 static int help(void) {
1029 printf("%s [OPTIONS...]\n\n"
1030 "Starts up and maintains the system or user services.\n\n"
1031 " -h --help Show this help\n"
1032 " --test Determine startup sequence, dump it and exit\n"
1033 " --dump-configuration-items Dump understood unit configuration items\n"
1034 " --unit=UNIT Set default unit\n"
1035 " --system Run a system instance, even if PID != 1\n"
1036 " --user Run a user instance\n"
1037 " --dump-core[=0|1] Dump core on crash\n"
1038 " --crash-shell[=0|1] Run shell on crash\n"
1039 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1040 " --show-status[=0|1] Show status updates on the console during bootup\n"
1041 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1042 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1043 " --log-color[=0|1] Highlight important log messages\n"
1044 " --log-location[=0|1] Include code location in log messages\n"
1045 " --default-standard-output= Set default standard output for services\n"
1046 " --default-standard-error= Set default standard error output for services\n",
1047 program_invocation_short_name);
1052 static int version(void) {
1053 puts(PACKAGE_STRING);
1054 puts(SYSTEMD_FEATURES);
1059 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1068 r = manager_open_serialization(m, &f);
1070 log_error("Failed to create serialization file: %s", strerror(-r));
1074 /* Make sure nothing is really destructed when we shut down */
1076 bus_manager_send_reloading(m, true);
1081 log_error("Failed to allocate fd set: %s", strerror(-r));
1085 r = manager_serialize(m, f, fds, switching_root);
1087 log_error("Failed to serialize state: %s", strerror(-r));
1091 if (fseeko(f, 0, SEEK_SET) < 0) {
1092 log_error("Failed to rewind serialization fd: %m");
1096 r = fd_cloexec(fileno(f), false);
1098 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1102 r = fdset_cloexec(fds, false);
1104 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1122 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1126 assert(saved_rlimit);
1128 /* Save the original RLIMIT_NOFILE so that we can reset it
1129 * later when transitioning from the initrd to the main
1130 * systemd or suchlike. */
1131 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1132 log_error("Reading RLIMIT_NOFILE failed: %m");
1136 /* Make sure forked processes get the default kernel setting */
1137 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1140 rl = newdup(struct rlimit, saved_rlimit, 1);
1144 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1147 /* Bump up the resource limit for ourselves substantially */
1148 nl.rlim_cur = nl.rlim_max = 64*1024;
1149 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1151 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1158 static void test_mtab(void) {
1160 static const char ok[] =
1161 "/proc/self/mounts\0"
1163 "../proc/self/mounts\0"
1166 _cleanup_free_ char *p = NULL;
1169 /* Check that /etc/mtab is a symlink to the right place or
1170 * non-existing. But certainly not a file, or a symlink to
1171 * some weird place... */
1173 r = readlink_malloc("/etc/mtab", &p);
1176 if (r >= 0 && nulstr_contains(ok, p))
1179 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1180 "This is not supported anymore. "
1181 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1184 static void test_usr(void) {
1186 /* Check that /usr is not a separate fs */
1188 if (dir_is_empty("/usr") <= 0)
1191 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1192 "Some things will probably break (sometimes even silently) in mysterious ways. "
1193 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1196 static int initialize_join_controllers(void) {
1197 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1198 * + "net_prio". We'd like to add "cpuset" to the mix, but
1199 * "cpuset" does't really work for groups with no initialized
1202 arg_join_controllers = new(char**, 3);
1203 if (!arg_join_controllers)
1206 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1207 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1208 arg_join_controllers[2] = NULL;
1210 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1211 free_join_controllers();
1218 static int enforce_syscall_archs(Set *archs) {
1220 scmp_filter_ctx *seccomp;
1225 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1229 SET_FOREACH(id, arg_syscall_archs, i) {
1230 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1234 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1239 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1241 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1245 r = seccomp_load(seccomp);
1247 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1250 seccomp_release(seccomp);
1257 static int status_welcome(void) {
1258 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1261 r = parse_env_file("/etc/os-release", NEWLINE,
1262 "PRETTY_NAME", &pretty_name,
1263 "ANSI_COLOR", &ansi_color,
1266 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1267 "PRETTY_NAME", &pretty_name,
1268 "ANSI_COLOR", &ansi_color,
1272 if (r < 0 && r != -ENOENT)
1273 log_warning("Failed to read os-release file: %s", strerror(-r));
1275 return status_printf(NULL, false, false,
1276 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1277 isempty(ansi_color) ? "1" : ansi_color,
1278 isempty(pretty_name) ? "Linux" : pretty_name);
1281 static int write_container_id(void) {
1284 c = getenv("container");
1288 return write_string_file("/run/systemd/container", c);
1291 int main(int argc, char *argv[]) {
1293 int r, retval = EXIT_FAILURE;
1294 usec_t before_startup, after_startup;
1295 char timespan[FORMAT_TIMESPAN_MAX];
1297 bool reexecute = false;
1298 const char *shutdown_verb = NULL;
1299 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1300 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1301 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1302 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1303 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1304 static char systemd[] = "systemd";
1305 bool skip_setup = false;
1307 bool loaded_policy = false;
1308 bool arm_reboot_watchdog = false;
1309 bool queue_default_job = false;
1310 bool empty_etc = false;
1311 char *switch_root_dir = NULL, *switch_root_init = NULL;
1312 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1314 #ifdef HAVE_SYSV_COMPAT
1315 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1316 /* This is compatibility support for SysV, where
1317 * calling init as a user is identical to telinit. */
1320 execv(SYSTEMCTL_BINARY_PATH, argv);
1321 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1326 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1327 dual_timestamp_get(&userspace_timestamp);
1329 /* Determine if this is a reexecution or normal bootup. We do
1330 * the full command line parsing much later, so let's just
1331 * have a quick peek here. */
1332 if (strv_find(argv+1, "--deserialize"))
1335 /* If we have switched root, do all the special setup
1337 if (strv_find(argv+1, "--switched-root"))
1340 /* If we get started via the /sbin/init symlink then we are
1341 called 'init'. After a subsequent reexecution we are then
1342 called 'systemd'. That is confusing, hence let's call us
1343 systemd right-away. */
1344 program_invocation_short_name = systemd;
1345 prctl(PR_SET_NAME, systemd);
1350 log_show_color(isatty(STDERR_FILENO) > 0);
1352 /* Disable the umask logic */
1356 if (getpid() == 1 && detect_container(NULL) <= 0) {
1358 /* Running outside of a container as PID 1 */
1359 arg_running_as = SYSTEMD_SYSTEM;
1361 log_set_target(LOG_TARGET_KMSG);
1365 initrd_timestamp = userspace_timestamp;
1368 mount_setup_early();
1369 dual_timestamp_get(&security_start_timestamp);
1370 if (selinux_setup(&loaded_policy) < 0)
1372 if (ima_setup() < 0)
1374 if (smack_setup(&loaded_policy) < 0)
1376 dual_timestamp_get(&security_finish_timestamp);
1379 if (label_init(NULL) < 0)
1383 if (clock_is_localtime() > 0) {
1386 /* The first-time call to settimeofday() does a time warp in the kernel */
1387 r = clock_set_timezone(&min);
1389 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1391 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1392 } else if (!in_initrd()) {
1394 * Do dummy first-time call to seal the kernel's time warp magic
1396 * Do not call this this from inside the initrd. The initrd might not
1397 * carry /etc/adjtime with LOCAL, but the real system could be set up
1398 * that way. In such case, we need to delay the time-warp or the sealing
1399 * until we reach the real system.
1401 clock_reset_timezone();
1403 /* Tell the kernel our timezone */
1404 r = clock_set_timezone(NULL);
1406 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1410 /* Set the default for later on, but don't actually
1411 * open the logs like this for now. Note that if we
1412 * are transitioning from the initrd there might still
1413 * be journal fd open, and we shouldn't attempt
1414 * opening that before we parsed /proc/cmdline which
1415 * might redirect output elsewhere. */
1416 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1418 } else if (getpid() == 1) {
1419 /* Running inside a container, as PID 1 */
1420 arg_running_as = SYSTEMD_SYSTEM;
1421 log_set_target(LOG_TARGET_CONSOLE);
1422 log_close_console(); /* force reopen of /dev/console */
1425 /* For the later on, see above... */
1426 log_set_target(LOG_TARGET_JOURNAL);
1428 /* clear the kernel timestamp,
1429 * because we are in a container */
1430 kernel_timestamp.monotonic = 0ULL;
1431 kernel_timestamp.realtime = 0ULL;
1434 /* Running as user instance */
1435 arg_running_as = SYSTEMD_USER;
1436 log_set_target(LOG_TARGET_AUTO);
1439 /* clear the kernel timestamp,
1440 * because we are not PID 1 */
1441 kernel_timestamp.monotonic = 0ULL;
1442 kernel_timestamp.realtime = 0ULL;
1445 /* Initialize default unit */
1446 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1448 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1452 r = initialize_join_controllers();
1456 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1457 * /proc/$PID/fd is available. */
1458 if (getpid() == 1) {
1459 r = mount_setup(loaded_policy);
1464 /* Reset all signal handlers. */
1465 assert_se(reset_all_signal_handlers() == 0);
1467 ignore_signals(SIGNALS_IGNORE, -1);
1469 if (parse_config_file() < 0)
1472 if (arg_running_as == SYSTEMD_SYSTEM)
1473 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1476 log_parse_environment();
1478 if (parse_argv(argc, argv) < 0)
1481 if (arg_action == ACTION_TEST &&
1483 log_error("Don't run test mode as root.");
1487 if (arg_running_as == SYSTEMD_USER &&
1488 arg_action == ACTION_RUN &&
1490 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1494 if (arg_running_as == SYSTEMD_SYSTEM &&
1495 arg_action == ACTION_RUN &&
1496 running_in_chroot() > 0) {
1497 log_error("Cannot be run in a chroot() environment.");
1501 if (arg_action == ACTION_HELP) {
1504 } else if (arg_action == ACTION_VERSION) {
1507 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1508 unit_dump_config_items(stdout);
1509 retval = EXIT_SUCCESS;
1511 } else if (arg_action == ACTION_DONE) {
1512 retval = EXIT_SUCCESS;
1516 if (arg_running_as == SYSTEMD_USER &&
1517 !getenv("XDG_RUNTIME_DIR")) {
1518 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1522 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1524 /* Close logging fds, in order not to confuse fdset below */
1527 /* Remember open file descriptors for later deserialization */
1528 r = fdset_new_fill(&fds);
1530 log_error("Failed to allocate fd set: %s", strerror(-r));
1533 fdset_cloexec(fds, true);
1535 if (arg_serialization)
1536 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1538 if (arg_running_as == SYSTEMD_SYSTEM)
1539 /* Become a session leader if we aren't one yet. */
1542 /* Move out of the way, so that we won't block unmounts */
1543 assert_se(chdir("/") == 0);
1545 /* Reset the console, but only if this is really init and we
1546 * are freshly booted */
1547 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1548 console_setup(getpid() == 1 && !skip_setup);
1550 /* Open the logging devices, if possible and necessary */
1553 if (arg_show_status == _SHOW_STATUS_UNSET)
1554 arg_show_status = SHOW_STATUS_YES;
1556 /* Make sure we leave a core dump without panicing the
1558 if (getpid() == 1) {
1559 install_crash_handler();
1561 r = mount_cgroup_controllers(arg_join_controllers);
1566 if (arg_running_as == SYSTEMD_SYSTEM) {
1567 const char *virtualization = NULL;
1569 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1571 detect_virtualization(&virtualization);
1573 log_info("Detected virtualization '%s'.", virtualization);
1575 write_container_id();
1577 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1580 log_info("Running in initial RAM disk.");
1582 empty_etc = dir_is_empty("/etc") > 0;
1584 log_info("Running with unpopulated /etc.");
1586 _cleanup_free_ char *t = uid_to_name(getuid());
1587 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1591 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1592 if (arg_show_status > 0 || plymouth_running())
1599 machine_id_setup(NULL);
1606 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1607 watchdog_set_timeout(&arg_runtime_watchdog);
1609 if (arg_timer_slack_nsec != (nsec_t) -1)
1610 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1611 log_error("Failed to adjust timer slack: %m");
1613 if (arg_capability_bounding_set_drop) {
1614 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1616 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1619 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1621 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1626 if (arg_syscall_archs) {
1627 r = enforce_syscall_archs(arg_syscall_archs);
1632 if (arg_running_as == SYSTEMD_USER) {
1633 /* Become reaper of our children */
1634 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1635 log_warning("Failed to make us a subreaper: %m");
1636 if (errno == EINVAL)
1637 log_info("Perhaps the kernel version is too old (< 3.4?)");
1641 if (arg_running_as == SYSTEMD_SYSTEM) {
1642 bump_rlimit_nofile(&saved_rlimit_nofile);
1645 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1647 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1649 log_info("Populated /etc with preset unit settings.");
1653 r = manager_new(arg_running_as, &m);
1655 log_error("Failed to allocate manager object: %s", strerror(-r));
1659 m->confirm_spawn = arg_confirm_spawn;
1660 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1661 m->default_std_output = arg_default_std_output;
1662 m->default_std_error = arg_default_std_error;
1663 m->default_restart_usec = arg_default_restart_usec;
1664 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1665 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1666 m->default_start_limit_interval = arg_default_start_limit_interval;
1667 m->default_start_limit_burst = arg_default_start_limit_burst;
1668 m->default_cpu_accounting = arg_default_cpu_accounting;
1669 m->default_blockio_accounting = arg_default_blockio_accounting;
1670 m->default_memory_accounting = arg_default_memory_accounting;
1671 m->runtime_watchdog = arg_runtime_watchdog;
1672 m->shutdown_watchdog = arg_shutdown_watchdog;
1673 m->userspace_timestamp = userspace_timestamp;
1674 m->kernel_timestamp = kernel_timestamp;
1675 m->initrd_timestamp = initrd_timestamp;
1676 m->security_start_timestamp = security_start_timestamp;
1677 m->security_finish_timestamp = security_finish_timestamp;
1679 manager_set_default_rlimits(m, arg_default_rlimit);
1680 manager_environment_add(m, NULL, arg_default_environment);
1681 manager_set_show_status(m, arg_show_status);
1683 /* Remember whether we should queue the default job */
1684 queue_default_job = !arg_serialization || arg_switched_root;
1686 before_startup = now(CLOCK_MONOTONIC);
1688 r = manager_startup(m, arg_serialization, fds);
1690 log_error("Failed to fully start up daemon: %s", strerror(-r));
1692 /* This will close all file descriptors that were opened, but
1693 * not claimed by any unit. */
1697 if (arg_serialization) {
1698 fclose(arg_serialization);
1699 arg_serialization = NULL;
1702 if (queue_default_job) {
1703 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1704 Unit *target = NULL;
1705 Job *default_unit_job;
1707 log_debug("Activating default unit: %s", arg_default_unit);
1709 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1711 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1712 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1713 log_error("Failed to load default target: %s", strerror(-target->load_error));
1714 else if (target->load_state == UNIT_MASKED)
1715 log_error("Default target masked.");
1717 if (!target || target->load_state != UNIT_LOADED) {
1718 log_info("Trying to load rescue target...");
1720 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1722 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1724 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1725 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1727 } else if (target->load_state == UNIT_MASKED) {
1728 log_error("Rescue target masked.");
1733 assert(target->load_state == UNIT_LOADED);
1735 if (arg_action == ACTION_TEST) {
1736 printf("-> By units:\n");
1737 manager_dump_units(m, stdout, "\t");
1740 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1742 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1744 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1746 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1750 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1754 m->default_unit_job_id = default_unit_job->id;
1756 after_startup = now(CLOCK_MONOTONIC);
1757 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1758 "Loaded units and determined initial transaction in %s.",
1759 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1761 if (arg_action == ACTION_TEST) {
1762 printf("-> By jobs:\n");
1763 manager_dump_jobs(m, stdout, "\t");
1764 retval = EXIT_SUCCESS;
1770 r = manager_loop(m);
1772 log_error("Failed to run mainloop: %s", strerror(-r));
1776 switch (m->exit_code) {
1779 retval = EXIT_SUCCESS;
1783 case MANAGER_RELOAD:
1784 log_info("Reloading.");
1785 r = manager_reload(m);
1787 log_error("Failed to reload: %s", strerror(-r));
1790 case MANAGER_REEXECUTE:
1792 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1796 log_notice("Reexecuting.");
1799 case MANAGER_SWITCH_ROOT:
1800 /* Steal the switch root parameters */
1801 switch_root_dir = m->switch_root;
1802 switch_root_init = m->switch_root_init;
1803 m->switch_root = m->switch_root_init = NULL;
1805 if (!switch_root_init)
1806 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1810 log_notice("Switching root.");
1813 case MANAGER_REBOOT:
1814 case MANAGER_POWEROFF:
1816 case MANAGER_KEXEC: {
1817 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1818 [MANAGER_REBOOT] = "reboot",
1819 [MANAGER_POWEROFF] = "poweroff",
1820 [MANAGER_HALT] = "halt",
1821 [MANAGER_KEXEC] = "kexec"
1824 assert_se(shutdown_verb = table[m->exit_code]);
1825 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1827 log_notice("Shutting down.");
1832 assert_not_reached("Unknown exit code.");
1842 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1843 free(arg_default_rlimit[j]);
1844 arg_default_rlimit[j] = NULL;
1847 free(arg_default_unit);
1848 arg_default_unit = NULL;
1850 free_join_controllers();
1852 strv_free(arg_default_environment);
1853 arg_default_environment = NULL;
1855 set_free(arg_syscall_archs);
1856 arg_syscall_archs = NULL;
1862 unsigned i, args_size;
1865 /* Close and disarm the watchdog, so that the new
1866 * instance can reinitialize it, but doesn't get
1867 * rebooted while we do that */
1868 watchdog_close(true);
1870 /* Reset the RLIMIT_NOFILE to the kernel default, so
1871 * that the new systemd can pass the kernel default to
1872 * its child processes */
1873 if (saved_rlimit_nofile.rlim_cur > 0)
1874 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1876 if (switch_root_dir) {
1877 /* Kill all remaining processes from the
1878 * initrd, but don't wait for them, so that we
1879 * can handle the SIGCHLD for them after
1881 broadcast_signal(SIGTERM, false, true);
1883 /* And switch root */
1884 r = switch_root(switch_root_dir);
1886 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1889 args_size = MAX(6, argc+1);
1890 args = newa(const char*, args_size);
1892 if (!switch_root_init) {
1895 /* First try to spawn ourselves with the right
1896 * path, and with full serialization. We do
1897 * this only if the user didn't specify an
1898 * explicit init to spawn. */
1900 assert(arg_serialization);
1903 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1907 args[i++] = SYSTEMD_BINARY_PATH;
1908 if (switch_root_dir)
1909 args[i++] = "--switched-root";
1910 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1911 args[i++] = "--deserialize";
1915 /* do not pass along the environment we inherit from the kernel or initrd */
1916 if (switch_root_dir)
1919 assert(i <= args_size);
1920 execv(args[0], (char* const*) args);
1923 /* Try the fallback, if there is any, without any
1924 * serialization. We pass the original argv[] and
1925 * envp[]. (Well, modulo the ordering changes due to
1926 * getopt() in argv[], and some cleanups in envp[],
1927 * but let's hope that doesn't matter.) */
1929 if (arg_serialization) {
1930 fclose(arg_serialization);
1931 arg_serialization = NULL;
1939 /* Reopen the console */
1940 make_console_stdio();
1942 for (j = 1, i = 1; j < (unsigned) argc; j++)
1943 args[i++] = argv[j];
1945 assert(i <= args_size);
1947 /* reenable any blocked signals, especially important
1948 * if we switch from initial ramdisk to init=... */
1950 sigprocmask(SIG_SETMASK, &ss, &o_ss);
1952 if (switch_root_init) {
1953 args[0] = switch_root_init;
1954 execv(args[0], (char* const*) args);
1955 log_warning("Failed to execute configured init, trying fallback: %m");
1958 args[0] = "/sbin/init";
1959 execv(args[0], (char* const*) args);
1961 if (errno == ENOENT) {
1962 log_warning("No /sbin/init, trying fallback");
1964 args[0] = "/bin/sh";
1966 execv(args[0], (char* const*) args);
1967 log_error("Failed to execute /bin/sh, giving up: %m");
1969 log_warning("Failed to execute /sbin/init, giving up: %m");
1971 sigprocmask(SIG_SETMASK, &o_ss, NULL);
1974 if (arg_serialization) {
1975 fclose(arg_serialization);
1976 arg_serialization = NULL;
1984 #ifdef HAVE_VALGRIND_VALGRIND_H
1985 /* If we are PID 1 and running under valgrind, then let's exit
1986 * here explicitly. valgrind will only generate nice output on
1987 * exit(), not on exec(), hence let's do the former not the
1989 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1993 if (shutdown_verb) {
1994 char log_level[DECIMAL_STR_MAX(int) + 1];
1995 const char* command_line[9] = {
1996 SYSTEMD_SHUTDOWN_BINARY_PATH,
1998 "--log-level", log_level,
2002 _cleanup_strv_free_ char **env_block = NULL;
2004 assert(command_line[pos] == NULL);
2005 env_block = strv_copy(environ);
2007 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
2009 switch (log_get_target()) {
2010 case LOG_TARGET_KMSG:
2011 case LOG_TARGET_JOURNAL_OR_KMSG:
2012 case LOG_TARGET_SYSLOG_OR_KMSG:
2013 command_line[pos++] = "kmsg";
2016 case LOG_TARGET_CONSOLE:
2018 command_line[pos++] = "console";
2022 if (log_get_show_color())
2023 command_line[pos++] = "--log-color";
2025 if (log_get_show_location())
2026 command_line[pos++] = "--log-location";
2028 assert(pos < ELEMENTSOF(command_line));
2030 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2033 /* If we reboot let's set the shutdown
2034 * watchdog and tell the shutdown binary to
2035 * repeatedly ping it */
2036 watchdog_set_timeout(&arg_shutdown_watchdog);
2037 watchdog_close(false);
2039 /* Tell the binary how often to ping, ignore failure */
2040 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2041 strv_push(&env_block, e);
2043 watchdog_close(true);
2045 /* Avoid the creation of new processes forked by the
2046 * kernel; at this point, we will not listen to the
2048 if (detect_container(NULL) <= 0)
2049 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2051 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2052 log_error("Failed to execute shutdown binary, %s: %m",
2053 getpid() == 1 ? "freezing" : "quitting");