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_NLIMITS] = {};
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_word(const char *word) {
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,
280 if (startswith(word, "systemd.unit=")) {
283 return set_default_unit(word + 13);
285 } else if (startswith(word, "rd.systemd.unit=")) {
288 return set_default_unit(word + 16);
290 } else if (startswith(word, "systemd.log_target=")) {
292 if (log_set_target_from_string(word + 19) < 0)
293 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
295 } else if (startswith(word, "systemd.log_level=")) {
297 if (log_set_max_level_from_string(word + 18) < 0)
298 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
300 } else if (startswith(word, "systemd.log_color=")) {
302 if (log_show_color_from_string(word + 18) < 0)
303 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
305 } else if (startswith(word, "systemd.log_location=")) {
307 if (log_show_location_from_string(word + 21) < 0)
308 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
310 } else if (startswith(word, "systemd.dump_core=")) {
313 r = parse_boolean(word + 18);
315 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
319 } else if (startswith(word, "systemd.crash_shell=")) {
322 r = parse_boolean(word + 20);
324 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
328 } else if (startswith(word, "systemd.confirm_spawn=")) {
331 r = parse_boolean(word + 22);
333 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
335 arg_confirm_spawn = r;
337 } else if (startswith(word, "systemd.crash_chvt=")) {
340 if (safe_atoi(word + 19, &k) < 0)
341 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
345 } else if (startswith(word, "systemd.show_status=")) {
348 r = parse_show_status(word + 20, &arg_show_status);
350 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
351 } else if (startswith(word, "systemd.default_standard_output=")) {
354 r = exec_output_from_string(word + 32);
356 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
358 arg_default_std_output = r;
359 } else if (startswith(word, "systemd.default_standard_error=")) {
362 r = exec_output_from_string(word + 31);
364 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
366 arg_default_std_error = r;
367 } else if (startswith(word, "systemd.setenv=")) {
368 const char *cenv = word + 15;
370 if (env_assignment_is_valid(cenv)) {
373 env = strv_env_set(arg_default_environment, cenv);
375 arg_default_environment = env;
377 log_warning("Setting environment variable '%s' failed, ignoring: %s",
378 cenv, strerror(ENOMEM));
380 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
382 } else if (startswith(word, "systemd.") ||
383 (in_initrd() && startswith(word, "rd.systemd."))) {
387 /* Ignore systemd.journald.xyz and friends */
389 if (startswith(c, "rd."))
391 if (startswith(c, "systemd."))
393 if (c[strcspn(c, ".=")] != '.') {
395 log_warning("Unknown kernel switch %s. Ignoring.", word);
397 log_info("Supported kernel switches:\n"
398 "systemd.unit=UNIT Default unit to start\n"
399 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
400 "systemd.dump_core=0|1 Dump core on crash\n"
401 "systemd.crash_shell=0|1 Run shell on crash\n"
402 "systemd.crash_chvt=N Change to VT #N on crash\n"
403 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
404 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
405 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
407 "systemd.log_level=LEVEL Log level\n"
408 "systemd.log_color=0|1 Highlight important log messages\n"
409 "systemd.log_location=0|1 Include code location in log messages\n"
410 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
411 " Set default log output for services\n"
412 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
413 " Set default log error output for services\n"
414 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
417 } else if (streq(word, "quiet")) {
418 if (arg_show_status == _SHOW_STATUS_UNSET)
419 arg_show_status = SHOW_STATUS_AUTO;
420 } else if (streq(word, "debug")) {
421 /* Log to kmsg, the journal socket will fill up before the
422 * journal is started and tools running during that time
423 * will block with every log message for for 60 seconds,
424 * before they give up. */
425 log_set_max_level(LOG_DEBUG);
426 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_KMSG);
427 } else if (!in_initrd()) {
430 /* SysV compatibility */
431 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
432 if (streq(word, 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 r = parse_proc_cmdline_word(*a);
1005 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1014 static int help(void) {
1016 printf("%s [OPTIONS...]\n\n"
1017 "Starts up and maintains the system or user services.\n\n"
1018 " -h --help Show this help\n"
1019 " --test Determine startup sequence, dump it and exit\n"
1020 " --dump-configuration-items Dump understood unit configuration items\n"
1021 " --unit=UNIT Set default unit\n"
1022 " --system Run a system instance, even if PID != 1\n"
1023 " --user Run a user instance\n"
1024 " --dump-core[=0|1] Dump core on crash\n"
1025 " --crash-shell[=0|1] Run shell on crash\n"
1026 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1027 " --show-status[=0|1] Show status updates on the console during bootup\n"
1028 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1029 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1030 " --log-color[=0|1] Highlight important log messages\n"
1031 " --log-location[=0|1] Include code location in log messages\n"
1032 " --default-standard-output= Set default standard output for services\n"
1033 " --default-standard-error= Set default standard error output for services\n",
1034 program_invocation_short_name);
1039 static int version(void) {
1040 puts(PACKAGE_STRING);
1041 puts(SYSTEMD_FEATURES);
1046 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1055 r = manager_open_serialization(m, &f);
1057 log_error("Failed to create serialization file: %s", strerror(-r));
1061 /* Make sure nothing is really destructed when we shut down */
1063 bus_manager_send_reloading(m, true);
1068 log_error("Failed to allocate fd set: %s", strerror(-r));
1072 r = manager_serialize(m, f, fds, switching_root);
1074 log_error("Failed to serialize state: %s", strerror(-r));
1078 if (fseeko(f, 0, SEEK_SET) < 0) {
1079 log_error("Failed to rewind serialization fd: %m");
1083 r = fd_cloexec(fileno(f), false);
1085 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1089 r = fdset_cloexec(fds, false);
1091 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1109 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1113 assert(saved_rlimit);
1115 /* Save the original RLIMIT_NOFILE so that we can reset it
1116 * later when transitioning from the initrd to the main
1117 * systemd or suchlike. */
1118 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1119 log_error("Reading RLIMIT_NOFILE failed: %m");
1123 /* Make sure forked processes get the default kernel setting */
1124 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1127 rl = newdup(struct rlimit, saved_rlimit, 1);
1131 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1134 /* Bump up the resource limit for ourselves substantially */
1135 nl.rlim_cur = nl.rlim_max = 64*1024;
1136 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1138 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1145 static void test_mtab(void) {
1148 /* Check that /etc/mtab is a symlink */
1150 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1153 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1160 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1161 "This is not supported anymore. "
1162 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1165 static void test_usr(void) {
1167 /* Check that /usr is not a separate fs */
1169 if (dir_is_empty("/usr") <= 0)
1172 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1173 "Some things will probably break (sometimes even silently) in mysterious ways. "
1174 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1177 static void test_cgroups(void) {
1179 if (access("/proc/cgroups", F_OK) >= 0)
1182 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1183 "Systems without control groups are not supported. "
1184 "We will now sleep for 10s, and then continue boot-up. "
1185 "Expect breakage and please do not file bugs. "
1186 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1187 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1192 static int initialize_join_controllers(void) {
1193 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1194 * + "net_prio". We'd like to add "cpuset" to the mix, but
1195 * "cpuset" does't really work for groups with no initialized
1198 arg_join_controllers = new(char**, 3);
1199 if (!arg_join_controllers)
1202 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1203 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1204 arg_join_controllers[2] = NULL;
1206 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1207 free_join_controllers();
1214 static int enforce_syscall_archs(Set *archs) {
1216 scmp_filter_ctx *seccomp;
1221 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1225 SET_FOREACH(id, arg_syscall_archs, i) {
1226 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1230 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1235 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1237 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1241 r = seccomp_load(seccomp);
1243 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1246 seccomp_release(seccomp);
1253 static int status_welcome(void) {
1254 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1257 r = parse_env_file("/etc/os-release", NEWLINE,
1258 "PRETTY_NAME", &pretty_name,
1259 "ANSI_COLOR", &ansi_color,
1262 if (r < 0 && r != -ENOENT)
1263 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
1265 return status_printf(NULL, false, false,
1266 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1267 isempty(ansi_color) ? "1" : ansi_color,
1268 isempty(pretty_name) ? "Linux" : pretty_name);
1271 int main(int argc, char *argv[]) {
1273 int r, retval = EXIT_FAILURE;
1274 usec_t before_startup, after_startup;
1275 char timespan[FORMAT_TIMESPAN_MAX];
1277 bool reexecute = false;
1278 const char *shutdown_verb = NULL;
1279 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1280 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1281 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1282 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1283 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1284 static char systemd[] = "systemd";
1285 bool skip_setup = false;
1287 bool loaded_policy = false;
1288 bool arm_reboot_watchdog = false;
1289 bool queue_default_job = false;
1290 char *switch_root_dir = NULL, *switch_root_init = NULL;
1291 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1293 #ifdef HAVE_SYSV_COMPAT
1294 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1295 /* This is compatibility support for SysV, where
1296 * calling init as a user is identical to telinit. */
1299 execv(SYSTEMCTL_BINARY_PATH, argv);
1300 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1305 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1306 dual_timestamp_get(&userspace_timestamp);
1308 /* Determine if this is a reexecution or normal bootup. We do
1309 * the full command line parsing much later, so let's just
1310 * have a quick peek here. */
1311 if (strv_find(argv+1, "--deserialize"))
1314 /* If we have switched root, do all the special setup
1316 if (strv_find(argv+1, "--switched-root"))
1319 /* If we get started via the /sbin/init symlink then we are
1320 called 'init'. After a subsequent reexecution we are then
1321 called 'systemd'. That is confusing, hence let's call us
1322 systemd right-away. */
1323 program_invocation_short_name = systemd;
1324 prctl(PR_SET_NAME, systemd);
1329 log_show_color(isatty(STDERR_FILENO) > 0);
1331 /* Disable the umask logic */
1335 if (getpid() == 1 && detect_container(NULL) <= 0) {
1337 /* Running outside of a container as PID 1 */
1338 arg_running_as = SYSTEMD_SYSTEM;
1340 log_set_target(LOG_TARGET_KMSG);
1344 initrd_timestamp = userspace_timestamp;
1347 mount_setup_early();
1348 dual_timestamp_get(&security_start_timestamp);
1349 if (selinux_setup(&loaded_policy) < 0)
1351 if (ima_setup() < 0)
1353 if (smack_setup(&loaded_policy) < 0)
1355 dual_timestamp_get(&security_finish_timestamp);
1358 if (label_init(NULL) < 0)
1362 if (hwclock_is_localtime() > 0) {
1365 /* The first-time call to settimeofday() does a time warp in the kernel */
1366 r = hwclock_set_timezone(&min);
1368 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1370 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1371 } else if (!in_initrd()) {
1373 * Do dummy first-time call to seal the kernel's time warp magic
1375 * Do not call this this from inside the initrd. The initrd might not
1376 * carry /etc/adjtime with LOCAL, but the real system could be set up
1377 * that way. In such case, we need to delay the time-warp or the sealing
1378 * until we reach the real system.
1380 hwclock_reset_timezone();
1382 /* Tell the kernel our timezone */
1383 r = hwclock_set_timezone(NULL);
1385 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1389 /* Set the default for later on, but don't actually
1390 * open the logs like this for now. Note that if we
1391 * are transitioning from the initrd there might still
1392 * be journal fd open, and we shouldn't attempt
1393 * opening that before we parsed /proc/cmdline which
1394 * might redirect output elsewhere. */
1395 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1397 } else if (getpid() == 1) {
1398 /* Running inside a container, as PID 1 */
1399 arg_running_as = SYSTEMD_SYSTEM;
1400 log_set_target(LOG_TARGET_CONSOLE);
1401 log_close_console(); /* force reopen of /dev/console */
1404 /* For the later on, see above... */
1405 log_set_target(LOG_TARGET_JOURNAL);
1407 /* clear the kernel timestamp,
1408 * because we are in a container */
1409 kernel_timestamp.monotonic = 0ULL;
1410 kernel_timestamp.realtime = 0ULL;
1413 /* Running as user instance */
1414 arg_running_as = SYSTEMD_USER;
1415 log_set_target(LOG_TARGET_AUTO);
1418 /* clear the kernel timestamp,
1419 * because we are not PID 1 */
1420 kernel_timestamp.monotonic = 0ULL;
1421 kernel_timestamp.realtime = 0ULL;
1424 /* Initialize default unit */
1425 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1427 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1431 r = initialize_join_controllers();
1435 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1436 * /proc/$PID/fd is available. */
1437 if (getpid() == 1) {
1438 r = mount_setup(loaded_policy);
1443 /* Reset all signal handlers. */
1444 assert_se(reset_all_signal_handlers() == 0);
1446 ignore_signals(SIGNALS_IGNORE, -1);
1448 if (parse_config_file() < 0)
1451 if (arg_running_as == SYSTEMD_SYSTEM)
1452 if (parse_proc_cmdline(parse_proc_cmdline_word) < 0)
1455 log_parse_environment();
1457 if (parse_argv(argc, argv) < 0)
1460 if (arg_action == ACTION_TEST &&
1462 log_error("Don't run test mode as root.");
1466 if (arg_running_as == SYSTEMD_USER &&
1467 arg_action == ACTION_RUN &&
1469 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1473 if (arg_running_as == SYSTEMD_SYSTEM &&
1474 arg_action == ACTION_RUN &&
1475 running_in_chroot() > 0) {
1476 log_error("Cannot be run in a chroot() environment.");
1480 if (arg_action == ACTION_HELP) {
1483 } else if (arg_action == ACTION_VERSION) {
1486 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1487 unit_dump_config_items(stdout);
1488 retval = EXIT_SUCCESS;
1490 } else if (arg_action == ACTION_DONE) {
1491 retval = EXIT_SUCCESS;
1495 if (arg_running_as == SYSTEMD_USER &&
1496 !getenv("XDG_RUNTIME_DIR")) {
1497 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1501 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1503 /* Close logging fds, in order not to confuse fdset below */
1506 /* Remember open file descriptors for later deserialization */
1507 r = fdset_new_fill(&fds);
1509 log_error("Failed to allocate fd set: %s", strerror(-r));
1512 fdset_cloexec(fds, true);
1514 if (arg_serialization)
1515 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1517 if (arg_running_as == SYSTEMD_SYSTEM)
1518 /* Become a session leader if we aren't one yet. */
1521 /* Move out of the way, so that we won't block unmounts */
1522 assert_se(chdir("/") == 0);
1524 /* Reset the console, but only if this is really init and we
1525 * are freshly booted */
1526 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1527 console_setup(getpid() == 1 && !skip_setup);
1529 /* Open the logging devices, if possible and necessary */
1532 if (arg_show_status == _SHOW_STATUS_UNSET)
1533 arg_show_status = SHOW_STATUS_YES;
1535 /* Make sure we leave a core dump without panicing the
1537 if (getpid() == 1) {
1538 install_crash_handler();
1540 r = mount_cgroup_controllers(arg_join_controllers);
1545 if (arg_running_as == SYSTEMD_SYSTEM) {
1546 const char *virtualization = NULL;
1548 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1550 detect_virtualization(&virtualization);
1552 log_info("Detected virtualization '%s'.", virtualization);
1554 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1557 log_info("Running in initial RAM disk.");
1560 _cleanup_free_ char *t = uid_to_name(getuid());
1561 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1565 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1566 if (arg_show_status > 0 || plymouth_running())
1570 if (detect_container(NULL) <= 0)
1582 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1583 watchdog_set_timeout(&arg_runtime_watchdog);
1585 if (arg_timer_slack_nsec != (nsec_t) -1)
1586 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1587 log_error("Failed to adjust timer slack: %m");
1589 if (arg_capability_bounding_set_drop) {
1590 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1592 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1595 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1597 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1602 if (arg_syscall_archs) {
1603 r = enforce_syscall_archs(arg_syscall_archs);
1608 if (arg_running_as == SYSTEMD_USER) {
1609 /* Become reaper of our children */
1610 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1611 log_warning("Failed to make us a subreaper: %m");
1612 if (errno == EINVAL)
1613 log_info("Perhaps the kernel version is too old (< 3.4?)");
1617 if (arg_running_as == SYSTEMD_SYSTEM)
1618 bump_rlimit_nofile(&saved_rlimit_nofile);
1620 r = manager_new(arg_running_as, &m);
1622 log_error("Failed to allocate manager object: %s", strerror(-r));
1626 m->confirm_spawn = arg_confirm_spawn;
1627 m->default_std_output = arg_default_std_output;
1628 m->default_std_error = arg_default_std_error;
1629 m->default_restart_usec = arg_default_restart_usec;
1630 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1631 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1632 m->default_start_limit_interval = arg_default_start_limit_interval;
1633 m->default_start_limit_burst = arg_default_start_limit_burst;
1634 m->default_cpu_accounting = arg_default_cpu_accounting;
1635 m->default_blockio_accounting = arg_default_blockio_accounting;
1636 m->default_memory_accounting = arg_default_memory_accounting;
1637 m->runtime_watchdog = arg_runtime_watchdog;
1638 m->shutdown_watchdog = arg_shutdown_watchdog;
1639 m->userspace_timestamp = userspace_timestamp;
1640 m->kernel_timestamp = kernel_timestamp;
1641 m->initrd_timestamp = initrd_timestamp;
1642 m->security_start_timestamp = security_start_timestamp;
1643 m->security_finish_timestamp = security_finish_timestamp;
1645 manager_set_default_rlimits(m, arg_default_rlimit);
1646 manager_environment_add(m, NULL, arg_default_environment);
1647 manager_set_show_status(m, arg_show_status);
1649 /* Remember whether we should queue the default job */
1650 queue_default_job = !arg_serialization || arg_switched_root;
1652 before_startup = now(CLOCK_MONOTONIC);
1654 r = manager_startup(m, arg_serialization, fds);
1656 log_error("Failed to fully start up daemon: %s", strerror(-r));
1658 /* This will close all file descriptors that were opened, but
1659 * not claimed by any unit. */
1663 if (arg_serialization) {
1664 fclose(arg_serialization);
1665 arg_serialization = NULL;
1668 if (queue_default_job) {
1669 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1670 Unit *target = NULL;
1671 Job *default_unit_job;
1673 log_debug("Activating default unit: %s", arg_default_unit);
1675 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1677 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1678 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1679 log_error("Failed to load default target: %s", strerror(-target->load_error));
1680 else if (target->load_state == UNIT_MASKED)
1681 log_error("Default target masked.");
1683 if (!target || target->load_state != UNIT_LOADED) {
1684 log_info("Trying to load rescue target...");
1686 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1688 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1690 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1691 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1693 } else if (target->load_state == UNIT_MASKED) {
1694 log_error("Rescue target masked.");
1699 assert(target->load_state == UNIT_LOADED);
1701 if (arg_action == ACTION_TEST) {
1702 printf("-> By units:\n");
1703 manager_dump_units(m, stdout, "\t");
1706 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1708 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1710 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1712 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1716 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1720 m->default_unit_job_id = default_unit_job->id;
1722 after_startup = now(CLOCK_MONOTONIC);
1723 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1724 "Loaded units and determined initial transaction in %s.",
1725 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1727 if (arg_action == ACTION_TEST) {
1728 printf("-> By jobs:\n");
1729 manager_dump_jobs(m, stdout, "\t");
1730 retval = EXIT_SUCCESS;
1736 r = manager_loop(m);
1738 log_error("Failed to run mainloop: %s", strerror(-r));
1742 switch (m->exit_code) {
1745 retval = EXIT_SUCCESS;
1749 case MANAGER_RELOAD:
1750 log_info("Reloading.");
1751 r = manager_reload(m);
1753 log_error("Failed to reload: %s", strerror(-r));
1756 case MANAGER_REEXECUTE:
1758 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1762 log_notice("Reexecuting.");
1765 case MANAGER_SWITCH_ROOT:
1766 /* Steal the switch root parameters */
1767 switch_root_dir = m->switch_root;
1768 switch_root_init = m->switch_root_init;
1769 m->switch_root = m->switch_root_init = NULL;
1771 if (!switch_root_init)
1772 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1776 log_notice("Switching root.");
1779 case MANAGER_REBOOT:
1780 case MANAGER_POWEROFF:
1782 case MANAGER_KEXEC: {
1783 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1784 [MANAGER_REBOOT] = "reboot",
1785 [MANAGER_POWEROFF] = "poweroff",
1786 [MANAGER_HALT] = "halt",
1787 [MANAGER_KEXEC] = "kexec"
1790 assert_se(shutdown_verb = table[m->exit_code]);
1791 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1793 log_notice("Shutting down.");
1798 assert_not_reached("Unknown exit code.");
1808 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1809 free(arg_default_rlimit[j]);
1810 arg_default_rlimit[j] = NULL;
1813 free(arg_default_unit);
1814 arg_default_unit = NULL;
1816 free_join_controllers();
1818 strv_free(arg_default_environment);
1819 arg_default_environment = NULL;
1821 set_free(arg_syscall_archs);
1822 arg_syscall_archs = NULL;
1828 unsigned i, args_size;
1830 /* Close and disarm the watchdog, so that the new
1831 * instance can reinitialize it, but doesn't get
1832 * rebooted while we do that */
1833 watchdog_close(true);
1835 /* Reset the RLIMIT_NOFILE to the kernel default, so
1836 * that the new systemd can pass the kernel default to
1837 * its child processes */
1838 if (saved_rlimit_nofile.rlim_cur > 0)
1839 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1841 if (switch_root_dir) {
1842 /* Kill all remaining processes from the
1843 * initrd, but don't wait for them, so that we
1844 * can handle the SIGCHLD for them after
1846 broadcast_signal(SIGTERM, false, true);
1848 /* And switch root */
1849 r = switch_root(switch_root_dir);
1851 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1854 args_size = MAX(6, argc+1);
1855 args = newa(const char*, args_size);
1857 if (!switch_root_init) {
1860 /* First try to spawn ourselves with the right
1861 * path, and with full serialization. We do
1862 * this only if the user didn't specify an
1863 * explicit init to spawn. */
1865 assert(arg_serialization);
1868 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1872 args[i++] = SYSTEMD_BINARY_PATH;
1873 if (switch_root_dir)
1874 args[i++] = "--switched-root";
1875 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1876 args[i++] = "--deserialize";
1880 /* do not pass along the environment we inherit from the kernel or initrd */
1881 if (switch_root_dir)
1884 assert(i <= args_size);
1885 execv(args[0], (char* const*) args);
1888 /* Try the fallback, if there is any, without any
1889 * serialization. We pass the original argv[] and
1890 * envp[]. (Well, modulo the ordering changes due to
1891 * getopt() in argv[], and some cleanups in envp[],
1892 * but let's hope that doesn't matter.) */
1894 if (arg_serialization) {
1895 fclose(arg_serialization);
1896 arg_serialization = NULL;
1904 /* Reopen the console */
1905 make_console_stdio();
1907 for (j = 1, i = 1; j < (unsigned) argc; j++)
1908 args[i++] = argv[j];
1910 assert(i <= args_size);
1912 if (switch_root_init) {
1913 args[0] = switch_root_init;
1914 execv(args[0], (char* const*) args);
1915 log_warning("Failed to execute configured init, trying fallback: %m");
1918 args[0] = "/sbin/init";
1919 execv(args[0], (char* const*) args);
1921 if (errno == ENOENT) {
1922 log_warning("No /sbin/init, trying fallback");
1924 args[0] = "/bin/sh";
1926 execv(args[0], (char* const*) args);
1927 log_error("Failed to execute /bin/sh, giving up: %m");
1929 log_warning("Failed to execute /sbin/init, giving up: %m");
1932 if (arg_serialization) {
1933 fclose(arg_serialization);
1934 arg_serialization = NULL;
1942 #ifdef HAVE_VALGRIND_VALGRIND_H
1943 /* If we are PID 1 and running under valgrind, then let's exit
1944 * here explicitly. valgrind will only generate nice output on
1945 * exit(), not on exec(), hence let's do the former not the
1947 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1951 if (shutdown_verb) {
1952 char log_level[DECIMAL_STR_MAX(int) + 1];
1953 const char* command_line[9] = {
1954 SYSTEMD_SHUTDOWN_BINARY_PATH,
1956 "--log-level", log_level,
1960 _cleanup_strv_free_ char **env_block = NULL;
1962 assert(command_line[pos] == NULL);
1963 env_block = strv_copy(environ);
1965 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1967 switch (log_get_target()) {
1968 case LOG_TARGET_KMSG:
1969 case LOG_TARGET_JOURNAL_OR_KMSG:
1970 case LOG_TARGET_SYSLOG_OR_KMSG:
1971 command_line[pos++] = "kmsg";
1974 case LOG_TARGET_CONSOLE:
1976 command_line[pos++] = "console";
1980 if (log_get_show_color())
1981 command_line[pos++] = "--log-color";
1983 if (log_get_show_location())
1984 command_line[pos++] = "--log-location";
1986 assert(pos + 1 < ELEMENTSOF(command_line));
1988 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1991 /* If we reboot let's set the shutdown
1992 * watchdog and tell the shutdown binary to
1993 * repeatedly ping it */
1994 watchdog_set_timeout(&arg_shutdown_watchdog);
1995 watchdog_close(false);
1997 /* Tell the binary how often to ping, ignore failure */
1998 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
1999 strv_push(&env_block, e);
2001 watchdog_close(true);
2003 /* Avoid the creation of new processes forked by the
2004 * kernel; at this point, we will not listen to the
2006 if (detect_container(NULL) <= 0)
2007 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2009 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2010 log_error("Failed to execute shutdown binary, %s: %m",
2011 getpid() == 1 ? "freezing" : "quitting");