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 Set* arg_syscall_archs = NULL;
112 static FILE* arg_serialization = NULL;
113 static bool arg_default_cpu_accounting = false;
114 static bool arg_default_blockio_accounting = false;
115 static bool arg_default_memory_accounting = false;
117 static void nop_handler(int sig) {}
119 noreturn static void crash(int sig) {
122 /* Pass this on immediately, if this is not PID 1 */
124 else if (!arg_dump_core)
125 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
127 struct sigaction sa = {
128 .sa_handler = nop_handler,
129 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
133 /* We want to wait for the core process, hence let's enable SIGCHLD */
134 sigaction(SIGCHLD, &sa, NULL);
138 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
141 struct rlimit rl = {};
143 /* Enable default signal handler for core dump */
145 sa.sa_handler = SIG_DFL;
146 sigaction(sig, &sa, NULL);
148 /* Don't limit the core dump size */
149 rl.rlim_cur = RLIM_INFINITY;
150 rl.rlim_max = RLIM_INFINITY;
151 setrlimit(RLIMIT_CORE, &rl);
153 /* Just to be sure... */
156 /* Raise the signal again */
159 assert_not_reached("We shouldn't be here...");
166 /* Order things nicely. */
167 r = wait_for_terminate(pid, &status);
169 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
170 else if (status.si_code != CLD_DUMPED)
171 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
173 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
178 chvt(arg_crash_chvt);
180 if (arg_crash_shell) {
181 struct sigaction sa = {
182 .sa_handler = SIG_IGN,
183 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
187 log_info("Executing crash shell in 10s...");
190 /* Let the kernel reap children for us */
191 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
195 log_error("Failed to fork off crash shell: %m");
197 make_console_stdio();
198 execl("/bin/sh", "/bin/sh", NULL);
200 log_error("execl() failed: %m");
204 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
207 log_info("Freezing execution.");
211 static void install_crash_handler(void) {
212 struct sigaction sa = {
214 .sa_flags = SA_NODEFER,
217 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
220 static int console_setup(bool do_reset) {
223 /* If we are init, we connect stdin/stdout/stderr to /dev/null
224 * and make sure we don't have a controlling tty. */
231 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
233 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
237 /* We don't want to force text mode.
238 * plymouth may be showing pictures already from initrd. */
239 r = reset_terminal_fd(tty_fd, false);
241 log_error("Failed to reset /dev/console: %s", strerror(-r));
243 close_nointr_nofail(tty_fd);
247 static int set_default_unit(const char *u) {
256 free(arg_default_unit);
257 arg_default_unit = c;
262 static int parse_proc_cmdline_item(const char *key, const char *value) {
264 static const char * const rlmap[] = {
265 "emergency", SPECIAL_EMERGENCY_TARGET,
266 "-b", SPECIAL_EMERGENCY_TARGET,
267 "single", SPECIAL_RESCUE_TARGET,
268 "-s", SPECIAL_RESCUE_TARGET,
269 "s", SPECIAL_RESCUE_TARGET,
270 "S", SPECIAL_RESCUE_TARGET,
271 "1", SPECIAL_RESCUE_TARGET,
272 "2", SPECIAL_RUNLEVEL2_TARGET,
273 "3", SPECIAL_RUNLEVEL3_TARGET,
274 "4", SPECIAL_RUNLEVEL4_TARGET,
275 "5", SPECIAL_RUNLEVEL5_TARGET,
281 if (streq(key, "systemd.unit") && value) {
284 return set_default_unit(value);
286 } else if (streq(key, "rd.systemd.unit") && value) {
288 return set_default_unit(value);
290 } else if (streq(key, "systemd.log_target") && value) {
292 if (log_set_target_from_string(value) < 0)
293 log_warning("Failed to parse log target %s. Ignoring.", value);
295 } else if (streq(key, "systemd.log_level") && value) {
297 if (log_set_max_level_from_string(value) < 0)
298 log_warning("Failed to parse log level %s. Ignoring.", value);
300 } else if (streq(key, "systemd.log_color") && value) {
302 if (log_show_color_from_string(value) < 0)
303 log_warning("Failed to parse log color setting %s. Ignoring.", value);
305 } else if (streq(key, "systemd.log_location") && value) {
307 if (log_show_location_from_string(value) < 0)
308 log_warning("Failed to parse log location setting %s. Ignoring.", value);
310 } else if (streq(key, "systemd.dump_core") && value) {
312 r = parse_boolean(value);
314 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
318 } else if (streq(key, "systemd.crash_shell") && value) {
320 r = parse_boolean(value);
322 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
326 } else if (streq(key, "systemd.crash_chvt") && value) {
328 if (safe_atoi(value, &r) < 0)
329 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
333 } else if (streq(key, "systemd.confirm_spawn") && value) {
335 r = parse_boolean(value);
337 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
339 arg_confirm_spawn = r;
341 } else if (streq(key, "systemd.show_status") && value) {
343 r = parse_show_status(value, &arg_show_status);
345 log_warning("Failed to parse show status switch %s. Ignoring.", value);
347 } else if (streq(key, "systemd.default_standard_output") && value) {
349 r = exec_output_from_string(value);
351 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
353 arg_default_std_output = r;
355 } else if (streq(key, "systemd.default_standard_error") && value) {
357 r = exec_output_from_string(value);
359 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
361 arg_default_std_error = r;
363 } else if (streq(key, "systemd.setenv") && value) {
365 if (env_assignment_is_valid(value)) {
368 env = strv_env_set(arg_default_environment, value);
370 arg_default_environment = env;
372 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
374 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
376 } else if (!streq(key, "systemd.restore_state") &&
377 !streq(key, "systemd.gpt_auto") &&
378 (startswith(key, "systemd.") || startswith(key, "rd.systemd."))) {
382 /* Ignore systemd.journald.xyz and friends */
384 if (startswith(c, "rd."))
386 if (startswith(c, "systemd."))
388 if (c[strcspn(c, ".=")] != '.') {
390 log_warning("Unknown kernel switch %s. Ignoring.", key);
392 log_info("Supported kernel switches:\n"
393 "systemd.unit=UNIT Default unit to start\n"
394 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
395 "systemd.dump_core=0|1 Dump core on crash\n"
396 "systemd.crash_shell=0|1 Run shell on crash\n"
397 "systemd.crash_chvt=N Change to VT #N on crash\n"
398 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
399 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
400 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
402 "systemd.log_level=LEVEL Log level\n"
403 "systemd.log_color=0|1 Highlight important log messages\n"
404 "systemd.log_location=0|1 Include code location in log messages\n"
405 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
406 " Set default log output for services\n"
407 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
408 " Set default log error output for services\n"
409 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n"
410 "systemd.restore_state=0|1 Restore backlight/rfkill state at boot\n");
413 } else if (streq(key, "quiet") && !value) {
415 if (arg_show_status == _SHOW_STATUS_UNSET)
416 arg_show_status = SHOW_STATUS_AUTO;
418 } else if (streq(key, "debug") && !value) {
420 /* Log to kmsg, the journal socket will fill up before the
421 * journal is started and tools running during that time
422 * will block with every log message for for 60 seconds,
423 * before they give up. */
424 log_set_max_level(LOG_DEBUG);
425 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_KMSG);
427 } else if (!in_initrd() && !value) {
430 /* SysV compatibility */
431 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
432 if (streq(key, rlmap[i]))
433 return set_default_unit(rlmap[i+1]);
439 #define DEFINE_SETTER(name, func, descr) \
440 static int name(const char *unit, \
441 const char *filename, \
443 const char *section, \
444 unsigned section_line, \
445 const char *lvalue, \
447 const char *rvalue, \
459 log_syntax(unit, LOG_ERR, filename, line, -r, \
460 "Invalid " descr "'%s': %s", \
461 rvalue, strerror(-r)); \
466 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
467 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
468 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
469 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
471 static int config_parse_cpu_affinity2(
473 const char *filename,
476 unsigned section_line,
493 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
498 if (!(t = strndup(w, l)))
501 r = safe_atou(t, &cpu);
505 if (!(c = cpu_set_malloc(&ncpus)))
508 if (r < 0 || cpu >= ncpus) {
509 log_syntax(unit, LOG_ERR, filename, line, -r,
510 "Failed to parse CPU affinity '%s'", rvalue);
515 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
519 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
520 log_warning_unit(unit, "Failed to set CPU affinity: %m");
528 static int config_parse_show_status(
530 const char *filename,
533 unsigned section_line,
541 ShowStatus *b = data;
548 k = parse_show_status(rvalue, b);
550 log_syntax(unit, LOG_ERR, filename, line, -k,
551 "Failed to parse show status setting, ignoring: %s", rvalue);
558 static void strv_free_free(char ***l) {
570 static void free_join_controllers(void) {
571 strv_free_free(arg_join_controllers);
572 arg_join_controllers = NULL;
575 static int config_parse_join_controllers(const char *unit,
576 const char *filename,
579 unsigned section_line,
594 free_join_controllers();
596 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
599 s = strndup(w, length);
603 l = strv_split(s, ",");
608 if (strv_length(l) <= 1) {
613 if (!arg_join_controllers) {
614 arg_join_controllers = new(char**, 2);
615 if (!arg_join_controllers) {
620 arg_join_controllers[0] = l;
621 arg_join_controllers[1] = NULL;
628 t = new0(char**, n+2);
636 for (a = arg_join_controllers; *a; a++) {
638 if (strv_overlap(*a, l)) {
639 if (strv_extend_strv(&l, *a) < 0) {
659 t[n++] = strv_uniq(l);
661 strv_free_free(arg_join_controllers);
662 arg_join_controllers = t;
669 static int parse_config_file(void) {
671 const ConfigTableItem items[] = {
672 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
673 { "Manager", "LogTarget", config_parse_target, 0, NULL },
674 { "Manager", "LogColor", config_parse_color, 0, NULL },
675 { "Manager", "LogLocation", config_parse_location, 0, NULL },
676 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
677 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
678 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
679 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
680 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
681 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
682 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
683 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
684 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
686 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
688 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
689 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
690 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
691 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
692 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
693 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
694 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
695 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
696 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
697 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
698 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
699 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
700 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
701 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
702 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
703 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
704 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
705 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
706 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
707 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
708 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
709 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
710 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
711 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
712 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
713 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
714 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
715 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
719 _cleanup_fclose_ FILE *f;
723 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
729 log_warning("Failed to open configuration file '%s': %m", fn);
733 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
735 log_warning("Failed to parse configuration file: %s", strerror(-r));
740 static int parse_argv(int argc, char *argv[]) {
743 ARG_LOG_LEVEL = 0x100,
752 ARG_DUMP_CONFIGURATION_ITEMS,
759 ARG_DEFAULT_STD_OUTPUT,
760 ARG_DEFAULT_STD_ERROR
763 static const struct option options[] = {
764 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
765 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
766 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
767 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
768 { "unit", required_argument, NULL, ARG_UNIT },
769 { "system", no_argument, NULL, ARG_SYSTEM },
770 { "user", no_argument, NULL, ARG_USER },
771 { "test", no_argument, NULL, ARG_TEST },
772 { "help", no_argument, NULL, 'h' },
773 { "version", no_argument, NULL, ARG_VERSION },
774 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
775 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
776 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
777 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
778 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
779 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
780 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
781 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
782 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
794 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
799 r = log_set_max_level_from_string(optarg);
801 log_error("Failed to parse log level %s.", optarg);
808 r = log_set_target_from_string(optarg);
810 log_error("Failed to parse log target %s.", optarg);
819 r = log_show_color_from_string(optarg);
821 log_error("Failed to parse log color setting %s.", optarg);
825 log_show_color(true);
829 case ARG_LOG_LOCATION:
831 r = log_show_location_from_string(optarg);
833 log_error("Failed to parse log location setting %s.", optarg);
837 log_show_location(true);
841 case ARG_DEFAULT_STD_OUTPUT:
842 r = exec_output_from_string(optarg);
844 log_error("Failed to parse default standard output setting %s.", optarg);
847 arg_default_std_output = r;
850 case ARG_DEFAULT_STD_ERROR:
851 r = exec_output_from_string(optarg);
853 log_error("Failed to parse default standard error output setting %s.", optarg);
856 arg_default_std_error = r;
861 r = set_default_unit(optarg);
863 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
870 arg_running_as = SYSTEMD_SYSTEM;
874 arg_running_as = SYSTEMD_USER;
878 arg_action = ACTION_TEST;
882 arg_action = ACTION_VERSION;
885 case ARG_DUMP_CONFIGURATION_ITEMS:
886 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
890 r = optarg ? parse_boolean(optarg) : 1;
892 log_error("Failed to parse dump core boolean %s.", optarg);
898 case ARG_CRASH_SHELL:
899 r = optarg ? parse_boolean(optarg) : 1;
901 log_error("Failed to parse crash shell boolean %s.", optarg);
907 case ARG_CONFIRM_SPAWN:
908 r = optarg ? parse_boolean(optarg) : 1;
910 log_error("Failed to parse confirm spawn boolean %s.", optarg);
913 arg_confirm_spawn = r;
916 case ARG_SHOW_STATUS:
918 r = parse_show_status(optarg, &arg_show_status);
920 log_error("Failed to parse show status boolean %s.", optarg);
924 arg_show_status = SHOW_STATUS_YES;
927 case ARG_DESERIALIZE: {
931 r = safe_atoi(optarg, &fd);
932 if (r < 0 || fd < 0) {
933 log_error("Failed to parse deserialize option %s.", optarg);
934 return r < 0 ? r : -EINVAL;
937 fd_cloexec(fd, true);
941 log_error("Failed to open serialization fd: %m");
945 if (arg_serialization)
946 fclose(arg_serialization);
948 arg_serialization = f;
953 case ARG_SWITCHED_ROOT:
954 arg_switched_root = true;
958 arg_action = ACTION_HELP;
962 log_set_max_level(LOG_DEBUG);
968 /* Just to eat away the sysvinit kernel
969 * cmdline args without getopt() error
970 * messages that we'll parse in
971 * parse_proc_cmdline_word() or ignore. */
976 log_error("Unknown option code %c", c);
983 if (optind < argc && getpid() != 1) {
984 /* Hmm, when we aren't run as init system
985 * let's complain about excess arguments */
987 log_error("Excess arguments.");
991 if (detect_container(NULL) > 0) {
994 /* All /proc/cmdline arguments the kernel didn't
995 * understand it passed to us. We're not really
996 * interested in that usually since /proc/cmdline is
997 * more interesting and complete. With one exception:
998 * if we are run in a container /proc/cmdline is not
999 * relevant for the container, hence we rely on argv[]
1002 for (a = argv; a < argv + argc; a++) {
1003 _cleanup_free_ char *w;
1010 value = strchr(w, '=');
1014 r = parse_proc_cmdline_item(w, value);
1016 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1025 static int help(void) {
1027 printf("%s [OPTIONS...]\n\n"
1028 "Starts up and maintains the system or user services.\n\n"
1029 " -h --help Show this help\n"
1030 " --test Determine startup sequence, dump it and exit\n"
1031 " --dump-configuration-items Dump understood unit configuration items\n"
1032 " --unit=UNIT Set default unit\n"
1033 " --system Run a system instance, even if PID != 1\n"
1034 " --user Run a user instance\n"
1035 " --dump-core[=0|1] Dump core on crash\n"
1036 " --crash-shell[=0|1] Run shell on crash\n"
1037 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1038 " --show-status[=0|1] Show status updates on the console during bootup\n"
1039 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1040 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1041 " --log-color[=0|1] Highlight important log messages\n"
1042 " --log-location[=0|1] Include code location in log messages\n"
1043 " --default-standard-output= Set default standard output for services\n"
1044 " --default-standard-error= Set default standard error output for services\n",
1045 program_invocation_short_name);
1050 static int version(void) {
1051 puts(PACKAGE_STRING);
1052 puts(SYSTEMD_FEATURES);
1057 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1066 r = manager_open_serialization(m, &f);
1068 log_error("Failed to create serialization file: %s", strerror(-r));
1072 /* Make sure nothing is really destructed when we shut down */
1074 bus_manager_send_reloading(m, true);
1079 log_error("Failed to allocate fd set: %s", strerror(-r));
1083 r = manager_serialize(m, f, fds, switching_root);
1085 log_error("Failed to serialize state: %s", strerror(-r));
1089 if (fseeko(f, 0, SEEK_SET) < 0) {
1090 log_error("Failed to rewind serialization fd: %m");
1094 r = fd_cloexec(fileno(f), false);
1096 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1100 r = fdset_cloexec(fds, false);
1102 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1120 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1124 assert(saved_rlimit);
1126 /* Save the original RLIMIT_NOFILE so that we can reset it
1127 * later when transitioning from the initrd to the main
1128 * systemd or suchlike. */
1129 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1130 log_error("Reading RLIMIT_NOFILE failed: %m");
1134 /* Make sure forked processes get the default kernel setting */
1135 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1138 rl = newdup(struct rlimit, saved_rlimit, 1);
1142 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1145 /* Bump up the resource limit for ourselves substantially */
1146 nl.rlim_cur = nl.rlim_max = 64*1024;
1147 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1149 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1156 static void test_mtab(void) {
1159 /* Check that /etc/mtab is a symlink */
1161 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1164 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1171 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1172 "This is not supported anymore. "
1173 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1176 static void test_usr(void) {
1178 /* Check that /usr is not a separate fs */
1180 if (dir_is_empty("/usr") <= 0)
1183 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1184 "Some things will probably break (sometimes even silently) in mysterious ways. "
1185 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1188 static void test_cgroups(void) {
1190 if (access("/proc/cgroups", F_OK) >= 0)
1193 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1194 "Systems without control groups are not supported. "
1195 "We will now sleep for 10s, and then continue boot-up. "
1196 "Expect breakage and please do not file bugs. "
1197 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1198 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1203 static int initialize_join_controllers(void) {
1204 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1205 * + "net_prio". We'd like to add "cpuset" to the mix, but
1206 * "cpuset" does't really work for groups with no initialized
1209 arg_join_controllers = new(char**, 3);
1210 if (!arg_join_controllers)
1213 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1214 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1215 arg_join_controllers[2] = NULL;
1217 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1218 free_join_controllers();
1225 static int enforce_syscall_archs(Set *archs) {
1227 scmp_filter_ctx *seccomp;
1232 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1236 SET_FOREACH(id, arg_syscall_archs, i) {
1237 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1241 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1246 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1248 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1252 r = seccomp_load(seccomp);
1254 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1257 seccomp_release(seccomp);
1264 static int status_welcome(void) {
1265 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1268 r = parse_env_file("/etc/os-release", NEWLINE,
1269 "PRETTY_NAME", &pretty_name,
1270 "ANSI_COLOR", &ansi_color,
1273 if (r < 0 && r != -ENOENT)
1274 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
1276 return status_printf(NULL, false, false,
1277 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1278 isempty(ansi_color) ? "1" : ansi_color,
1279 isempty(pretty_name) ? "Linux" : pretty_name);
1282 int main(int argc, char *argv[]) {
1284 int r, retval = EXIT_FAILURE;
1285 usec_t before_startup, after_startup;
1286 char timespan[FORMAT_TIMESPAN_MAX];
1288 bool reexecute = false;
1289 const char *shutdown_verb = NULL;
1290 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1291 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1292 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1293 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1294 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1295 static char systemd[] = "systemd";
1296 bool skip_setup = false;
1298 bool loaded_policy = false;
1299 bool arm_reboot_watchdog = false;
1300 bool queue_default_job = false;
1301 char *switch_root_dir = NULL, *switch_root_init = NULL;
1302 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1304 #ifdef HAVE_SYSV_COMPAT
1305 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1306 /* This is compatibility support for SysV, where
1307 * calling init as a user is identical to telinit. */
1310 execv(SYSTEMCTL_BINARY_PATH, argv);
1311 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1316 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1317 dual_timestamp_get(&userspace_timestamp);
1319 /* Determine if this is a reexecution or normal bootup. We do
1320 * the full command line parsing much later, so let's just
1321 * have a quick peek here. */
1322 if (strv_find(argv+1, "--deserialize"))
1325 /* If we have switched root, do all the special setup
1327 if (strv_find(argv+1, "--switched-root"))
1330 /* If we get started via the /sbin/init symlink then we are
1331 called 'init'. After a subsequent reexecution we are then
1332 called 'systemd'. That is confusing, hence let's call us
1333 systemd right-away. */
1334 program_invocation_short_name = systemd;
1335 prctl(PR_SET_NAME, systemd);
1340 log_show_color(isatty(STDERR_FILENO) > 0);
1342 /* Disable the umask logic */
1346 if (getpid() == 1 && detect_container(NULL) <= 0) {
1348 /* Running outside of a container as PID 1 */
1349 arg_running_as = SYSTEMD_SYSTEM;
1351 log_set_target(LOG_TARGET_KMSG);
1355 initrd_timestamp = userspace_timestamp;
1358 mount_setup_early();
1359 dual_timestamp_get(&security_start_timestamp);
1360 if (selinux_setup(&loaded_policy) < 0)
1362 if (ima_setup() < 0)
1364 if (smack_setup(&loaded_policy) < 0)
1366 dual_timestamp_get(&security_finish_timestamp);
1369 if (label_init(NULL) < 0)
1373 if (hwclock_is_localtime() > 0) {
1376 /* The first-time call to settimeofday() does a time warp in the kernel */
1377 r = hwclock_set_timezone(&min);
1379 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1381 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1382 } else if (!in_initrd()) {
1384 * Do dummy first-time call to seal the kernel's time warp magic
1386 * Do not call this this from inside the initrd. The initrd might not
1387 * carry /etc/adjtime with LOCAL, but the real system could be set up
1388 * that way. In such case, we need to delay the time-warp or the sealing
1389 * until we reach the real system.
1391 hwclock_reset_timezone();
1393 /* Tell the kernel our timezone */
1394 r = hwclock_set_timezone(NULL);
1396 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1400 /* Set the default for later on, but don't actually
1401 * open the logs like this for now. Note that if we
1402 * are transitioning from the initrd there might still
1403 * be journal fd open, and we shouldn't attempt
1404 * opening that before we parsed /proc/cmdline which
1405 * might redirect output elsewhere. */
1406 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1408 } else if (getpid() == 1) {
1409 /* Running inside a container, as PID 1 */
1410 arg_running_as = SYSTEMD_SYSTEM;
1411 log_set_target(LOG_TARGET_CONSOLE);
1412 log_close_console(); /* force reopen of /dev/console */
1415 /* For the later on, see above... */
1416 log_set_target(LOG_TARGET_JOURNAL);
1418 /* clear the kernel timestamp,
1419 * because we are in a container */
1420 kernel_timestamp.monotonic = 0ULL;
1421 kernel_timestamp.realtime = 0ULL;
1424 /* Running as user instance */
1425 arg_running_as = SYSTEMD_USER;
1426 log_set_target(LOG_TARGET_AUTO);
1429 /* clear the kernel timestamp,
1430 * because we are not PID 1 */
1431 kernel_timestamp.monotonic = 0ULL;
1432 kernel_timestamp.realtime = 0ULL;
1435 /* Initialize default unit */
1436 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1438 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1442 r = initialize_join_controllers();
1446 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1447 * /proc/$PID/fd is available. */
1448 if (getpid() == 1) {
1449 r = mount_setup(loaded_policy);
1454 /* Reset all signal handlers. */
1455 assert_se(reset_all_signal_handlers() == 0);
1457 ignore_signals(SIGNALS_IGNORE, -1);
1459 if (parse_config_file() < 0)
1462 if (arg_running_as == SYSTEMD_SYSTEM)
1463 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1466 log_parse_environment();
1468 if (parse_argv(argc, argv) < 0)
1471 if (arg_action == ACTION_TEST &&
1473 log_error("Don't run test mode as root.");
1477 if (arg_running_as == SYSTEMD_USER &&
1478 arg_action == ACTION_RUN &&
1480 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1484 if (arg_running_as == SYSTEMD_SYSTEM &&
1485 arg_action == ACTION_RUN &&
1486 running_in_chroot() > 0) {
1487 log_error("Cannot be run in a chroot() environment.");
1491 if (arg_action == ACTION_HELP) {
1494 } else if (arg_action == ACTION_VERSION) {
1497 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1498 unit_dump_config_items(stdout);
1499 retval = EXIT_SUCCESS;
1501 } else if (arg_action == ACTION_DONE) {
1502 retval = EXIT_SUCCESS;
1506 if (arg_running_as == SYSTEMD_USER &&
1507 !getenv("XDG_RUNTIME_DIR")) {
1508 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1512 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1514 /* Close logging fds, in order not to confuse fdset below */
1517 /* Remember open file descriptors for later deserialization */
1518 r = fdset_new_fill(&fds);
1520 log_error("Failed to allocate fd set: %s", strerror(-r));
1523 fdset_cloexec(fds, true);
1525 if (arg_serialization)
1526 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1528 if (arg_running_as == SYSTEMD_SYSTEM)
1529 /* Become a session leader if we aren't one yet. */
1532 /* Move out of the way, so that we won't block unmounts */
1533 assert_se(chdir("/") == 0);
1535 /* Reset the console, but only if this is really init and we
1536 * are freshly booted */
1537 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1538 console_setup(getpid() == 1 && !skip_setup);
1540 /* Open the logging devices, if possible and necessary */
1543 if (arg_show_status == _SHOW_STATUS_UNSET)
1544 arg_show_status = SHOW_STATUS_YES;
1546 /* Make sure we leave a core dump without panicing the
1548 if (getpid() == 1) {
1549 install_crash_handler();
1551 r = mount_cgroup_controllers(arg_join_controllers);
1556 if (arg_running_as == SYSTEMD_SYSTEM) {
1557 const char *virtualization = NULL;
1559 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1561 detect_virtualization(&virtualization);
1563 log_info("Detected virtualization '%s'.", virtualization);
1565 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1568 log_info("Running in initial RAM disk.");
1571 _cleanup_free_ char *t = uid_to_name(getuid());
1572 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1576 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1577 if (arg_show_status > 0 || plymouth_running())
1581 if (detect_container(NULL) <= 0)
1593 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1594 watchdog_set_timeout(&arg_runtime_watchdog);
1596 if (arg_timer_slack_nsec != (nsec_t) -1)
1597 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1598 log_error("Failed to adjust timer slack: %m");
1600 if (arg_capability_bounding_set_drop) {
1601 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1603 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1606 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1608 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1613 if (arg_syscall_archs) {
1614 r = enforce_syscall_archs(arg_syscall_archs);
1619 if (arg_running_as == SYSTEMD_USER) {
1620 /* Become reaper of our children */
1621 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1622 log_warning("Failed to make us a subreaper: %m");
1623 if (errno == EINVAL)
1624 log_info("Perhaps the kernel version is too old (< 3.4?)");
1628 if (arg_running_as == SYSTEMD_SYSTEM)
1629 bump_rlimit_nofile(&saved_rlimit_nofile);
1631 r = manager_new(arg_running_as, &m);
1633 log_error("Failed to allocate manager object: %s", strerror(-r));
1637 m->confirm_spawn = arg_confirm_spawn;
1638 m->default_std_output = arg_default_std_output;
1639 m->default_std_error = arg_default_std_error;
1640 m->default_restart_usec = arg_default_restart_usec;
1641 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1642 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1643 m->default_start_limit_interval = arg_default_start_limit_interval;
1644 m->default_start_limit_burst = arg_default_start_limit_burst;
1645 m->default_cpu_accounting = arg_default_cpu_accounting;
1646 m->default_blockio_accounting = arg_default_blockio_accounting;
1647 m->default_memory_accounting = arg_default_memory_accounting;
1648 m->runtime_watchdog = arg_runtime_watchdog;
1649 m->shutdown_watchdog = arg_shutdown_watchdog;
1650 m->userspace_timestamp = userspace_timestamp;
1651 m->kernel_timestamp = kernel_timestamp;
1652 m->initrd_timestamp = initrd_timestamp;
1653 m->security_start_timestamp = security_start_timestamp;
1654 m->security_finish_timestamp = security_finish_timestamp;
1656 manager_set_default_rlimits(m, arg_default_rlimit);
1657 manager_environment_add(m, NULL, arg_default_environment);
1658 manager_set_show_status(m, arg_show_status);
1660 /* Remember whether we should queue the default job */
1661 queue_default_job = !arg_serialization || arg_switched_root;
1663 before_startup = now(CLOCK_MONOTONIC);
1665 r = manager_startup(m, arg_serialization, fds);
1667 log_error("Failed to fully start up daemon: %s", strerror(-r));
1669 /* This will close all file descriptors that were opened, but
1670 * not claimed by any unit. */
1674 if (arg_serialization) {
1675 fclose(arg_serialization);
1676 arg_serialization = NULL;
1679 if (queue_default_job) {
1680 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1681 Unit *target = NULL;
1682 Job *default_unit_job;
1684 log_debug("Activating default unit: %s", arg_default_unit);
1686 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1688 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1689 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1690 log_error("Failed to load default target: %s", strerror(-target->load_error));
1691 else if (target->load_state == UNIT_MASKED)
1692 log_error("Default target masked.");
1694 if (!target || target->load_state != UNIT_LOADED) {
1695 log_info("Trying to load rescue target...");
1697 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1699 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1701 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1702 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1704 } else if (target->load_state == UNIT_MASKED) {
1705 log_error("Rescue target masked.");
1710 assert(target->load_state == UNIT_LOADED);
1712 if (arg_action == ACTION_TEST) {
1713 printf("-> By units:\n");
1714 manager_dump_units(m, stdout, "\t");
1717 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1719 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1721 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1723 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1727 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1731 m->default_unit_job_id = default_unit_job->id;
1733 after_startup = now(CLOCK_MONOTONIC);
1734 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1735 "Loaded units and determined initial transaction in %s.",
1736 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1738 if (arg_action == ACTION_TEST) {
1739 printf("-> By jobs:\n");
1740 manager_dump_jobs(m, stdout, "\t");
1741 retval = EXIT_SUCCESS;
1747 r = manager_loop(m);
1749 log_error("Failed to run mainloop: %s", strerror(-r));
1753 switch (m->exit_code) {
1756 retval = EXIT_SUCCESS;
1760 case MANAGER_RELOAD:
1761 log_info("Reloading.");
1762 r = manager_reload(m);
1764 log_error("Failed to reload: %s", strerror(-r));
1767 case MANAGER_REEXECUTE:
1769 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1773 log_notice("Reexecuting.");
1776 case MANAGER_SWITCH_ROOT:
1777 /* Steal the switch root parameters */
1778 switch_root_dir = m->switch_root;
1779 switch_root_init = m->switch_root_init;
1780 m->switch_root = m->switch_root_init = NULL;
1782 if (!switch_root_init)
1783 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1787 log_notice("Switching root.");
1790 case MANAGER_REBOOT:
1791 case MANAGER_POWEROFF:
1793 case MANAGER_KEXEC: {
1794 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1795 [MANAGER_REBOOT] = "reboot",
1796 [MANAGER_POWEROFF] = "poweroff",
1797 [MANAGER_HALT] = "halt",
1798 [MANAGER_KEXEC] = "kexec"
1801 assert_se(shutdown_verb = table[m->exit_code]);
1802 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1804 log_notice("Shutting down.");
1809 assert_not_reached("Unknown exit code.");
1819 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1820 free(arg_default_rlimit[j]);
1821 arg_default_rlimit[j] = NULL;
1824 free(arg_default_unit);
1825 arg_default_unit = NULL;
1827 free_join_controllers();
1829 strv_free(arg_default_environment);
1830 arg_default_environment = NULL;
1832 set_free(arg_syscall_archs);
1833 arg_syscall_archs = NULL;
1839 unsigned i, args_size;
1841 /* Close and disarm the watchdog, so that the new
1842 * instance can reinitialize it, but doesn't get
1843 * rebooted while we do that */
1844 watchdog_close(true);
1846 /* Reset the RLIMIT_NOFILE to the kernel default, so
1847 * that the new systemd can pass the kernel default to
1848 * its child processes */
1849 if (saved_rlimit_nofile.rlim_cur > 0)
1850 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1852 if (switch_root_dir) {
1853 /* Kill all remaining processes from the
1854 * initrd, but don't wait for them, so that we
1855 * can handle the SIGCHLD for them after
1857 broadcast_signal(SIGTERM, false, true);
1859 /* And switch root */
1860 r = switch_root(switch_root_dir);
1862 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1865 args_size = MAX(6, argc+1);
1866 args = newa(const char*, args_size);
1868 if (!switch_root_init) {
1871 /* First try to spawn ourselves with the right
1872 * path, and with full serialization. We do
1873 * this only if the user didn't specify an
1874 * explicit init to spawn. */
1876 assert(arg_serialization);
1879 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1883 args[i++] = SYSTEMD_BINARY_PATH;
1884 if (switch_root_dir)
1885 args[i++] = "--switched-root";
1886 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1887 args[i++] = "--deserialize";
1891 /* do not pass along the environment we inherit from the kernel or initrd */
1892 if (switch_root_dir)
1895 assert(i <= args_size);
1896 execv(args[0], (char* const*) args);
1899 /* Try the fallback, if there is any, without any
1900 * serialization. We pass the original argv[] and
1901 * envp[]. (Well, modulo the ordering changes due to
1902 * getopt() in argv[], and some cleanups in envp[],
1903 * but let's hope that doesn't matter.) */
1905 if (arg_serialization) {
1906 fclose(arg_serialization);
1907 arg_serialization = NULL;
1915 /* Reopen the console */
1916 make_console_stdio();
1918 for (j = 1, i = 1; j < (unsigned) argc; j++)
1919 args[i++] = argv[j];
1921 assert(i <= args_size);
1923 if (switch_root_init) {
1924 args[0] = switch_root_init;
1925 execv(args[0], (char* const*) args);
1926 log_warning("Failed to execute configured init, trying fallback: %m");
1929 args[0] = "/sbin/init";
1930 execv(args[0], (char* const*) args);
1932 if (errno == ENOENT) {
1933 log_warning("No /sbin/init, trying fallback");
1935 args[0] = "/bin/sh";
1937 execv(args[0], (char* const*) args);
1938 log_error("Failed to execute /bin/sh, giving up: %m");
1940 log_warning("Failed to execute /sbin/init, giving up: %m");
1943 if (arg_serialization) {
1944 fclose(arg_serialization);
1945 arg_serialization = NULL;
1953 #ifdef HAVE_VALGRIND_VALGRIND_H
1954 /* If we are PID 1 and running under valgrind, then let's exit
1955 * here explicitly. valgrind will only generate nice output on
1956 * exit(), not on exec(), hence let's do the former not the
1958 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1962 if (shutdown_verb) {
1963 char log_level[DECIMAL_STR_MAX(int) + 1];
1964 const char* command_line[9] = {
1965 SYSTEMD_SHUTDOWN_BINARY_PATH,
1967 "--log-level", log_level,
1971 _cleanup_strv_free_ char **env_block = NULL;
1973 assert(command_line[pos] == NULL);
1974 env_block = strv_copy(environ);
1976 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1978 switch (log_get_target()) {
1979 case LOG_TARGET_KMSG:
1980 case LOG_TARGET_JOURNAL_OR_KMSG:
1981 case LOG_TARGET_SYSLOG_OR_KMSG:
1982 command_line[pos++] = "kmsg";
1985 case LOG_TARGET_CONSOLE:
1987 command_line[pos++] = "console";
1991 if (log_get_show_color())
1992 command_line[pos++] = "--log-color";
1994 if (log_get_show_location())
1995 command_line[pos++] = "--log-location";
1997 assert(pos < ELEMENTSOF(command_line));
1999 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2002 /* If we reboot let's set the shutdown
2003 * watchdog and tell the shutdown binary to
2004 * repeatedly ping it */
2005 watchdog_set_timeout(&arg_shutdown_watchdog);
2006 watchdog_close(false);
2008 /* Tell the binary how often to ping, ignore failure */
2009 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2010 strv_push(&env_block, e);
2012 watchdog_close(true);
2014 /* Avoid the creation of new processes forked by the
2015 * kernel; at this point, we will not listen to the
2017 if (detect_container(NULL) <= 0)
2018 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2020 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2021 log_error("Failed to execute shutdown binary, %s: %m",
2022 getpid() == 1 ? "freezing" : "quitting");