1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
26 #include <sys/types.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
47 #include "load-fragment.h"
50 #include "conf-parser.h"
57 #include "architecture.h"
59 #include "path-util.h"
60 #include "switch-root.h"
61 #include "capability.h"
66 #include "dbus-manager.h"
67 #include "bus-error.h"
70 #include "mount-setup.h"
71 #include "loopback-setup.h"
72 #include "hostname-setup.h"
73 #include "machine-id-setup.h"
74 #include "selinux-setup.h"
75 #include "ima-setup.h"
76 #include "smack-setup.h"
78 #include "kmod-setup.h"
86 ACTION_DUMP_CONFIGURATION_ITEMS,
88 } arg_action = ACTION_RUN;
89 static char *arg_default_unit = NULL;
90 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
91 static bool arg_dump_core = true;
92 static bool arg_crash_shell = false;
93 static int arg_crash_chvt = -1;
94 static bool arg_confirm_spawn = false;
95 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
96 static bool arg_switched_root = false;
97 static char ***arg_join_controllers = NULL;
98 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
99 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
100 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
101 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
102 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
103 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
104 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
105 static usec_t arg_runtime_watchdog = 0;
106 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
107 static char **arg_default_environment = NULL;
108 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
109 static uint64_t arg_capability_bounding_set_drop = 0;
110 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
111 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
112 static Set* arg_syscall_archs = NULL;
113 static FILE* arg_serialization = NULL;
114 static bool arg_default_cpu_accounting = false;
115 static bool arg_default_blockio_accounting = false;
116 static bool arg_default_memory_accounting = false;
118 static void nop_handler(int sig) {}
120 noreturn static void crash(int sig) {
123 /* Pass this on immediately, if this is not PID 1 */
125 else if (!arg_dump_core)
126 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
128 struct sigaction sa = {
129 .sa_handler = nop_handler,
130 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
134 /* We want to wait for the core process, hence let's enable SIGCHLD */
135 sigaction(SIGCHLD, &sa, NULL);
139 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
142 struct rlimit rl = {};
144 /* Enable default signal handler for core dump */
146 sa.sa_handler = SIG_DFL;
147 sigaction(sig, &sa, NULL);
149 /* Don't limit the core dump size */
150 rl.rlim_cur = RLIM_INFINITY;
151 rl.rlim_max = RLIM_INFINITY;
152 setrlimit(RLIMIT_CORE, &rl);
154 /* Just to be sure... */
157 /* Raise the signal again */
160 assert_not_reached("We shouldn't be here...");
167 /* Order things nicely. */
168 r = wait_for_terminate(pid, &status);
170 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
171 else if (status.si_code != CLD_DUMPED)
172 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
174 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
179 chvt(arg_crash_chvt);
181 if (arg_crash_shell) {
182 struct sigaction sa = {
183 .sa_handler = SIG_IGN,
184 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
188 log_info("Executing crash shell in 10s...");
191 /* Let the kernel reap children for us */
192 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
196 log_error("Failed to fork off crash shell: %m");
198 make_console_stdio();
199 execl("/bin/sh", "/bin/sh", NULL);
201 log_error("execl() failed: %m");
205 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
208 log_info("Freezing execution.");
212 static void install_crash_handler(void) {
213 struct sigaction sa = {
215 .sa_flags = SA_NODEFER,
218 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
221 static int console_setup(bool do_reset) {
224 /* If we are init, we connect stdin/stdout/stderr to /dev/null
225 * and make sure we don't have a controlling tty. */
232 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
234 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
238 /* We don't want to force text mode.
239 * plymouth may be showing pictures already from initrd. */
240 r = reset_terminal_fd(tty_fd, false);
242 log_error("Failed to reset /dev/console: %s", strerror(-r));
248 static int set_default_unit(const char *u) {
257 free(arg_default_unit);
258 arg_default_unit = c;
263 static int parse_proc_cmdline_item(const char *key, const char *value) {
265 static const char * const rlmap[] = {
266 "emergency", SPECIAL_EMERGENCY_TARGET,
267 "-b", SPECIAL_EMERGENCY_TARGET,
268 "single", SPECIAL_RESCUE_TARGET,
269 "-s", SPECIAL_RESCUE_TARGET,
270 "s", SPECIAL_RESCUE_TARGET,
271 "S", SPECIAL_RESCUE_TARGET,
272 "1", SPECIAL_RESCUE_TARGET,
273 "2", SPECIAL_RUNLEVEL2_TARGET,
274 "3", SPECIAL_RUNLEVEL3_TARGET,
275 "4", SPECIAL_RUNLEVEL4_TARGET,
276 "5", SPECIAL_RUNLEVEL5_TARGET,
282 if (streq(key, "systemd.unit") && value) {
285 return set_default_unit(value);
287 } else if (streq(key, "rd.systemd.unit") && value) {
289 return set_default_unit(value);
291 } else if (streq(key, "systemd.log_target") && value) {
293 if (log_set_target_from_string(value) < 0)
294 log_warning("Failed to parse log target %s. Ignoring.", value);
296 } else if (streq(key, "systemd.log_level") && value) {
298 if (log_set_max_level_from_string(value) < 0)
299 log_warning("Failed to parse log level %s. Ignoring.", value);
301 } else if (streq(key, "systemd.log_color") && value) {
303 if (log_show_color_from_string(value) < 0)
304 log_warning("Failed to parse log color setting %s. Ignoring.", value);
306 } else if (streq(key, "systemd.log_location") && value) {
308 if (log_show_location_from_string(value) < 0)
309 log_warning("Failed to parse log location setting %s. Ignoring.", value);
311 } else if (streq(key, "systemd.dump_core") && value) {
313 r = parse_boolean(value);
315 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
319 } else if (streq(key, "systemd.crash_shell") && value) {
321 r = parse_boolean(value);
323 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
327 } else if (streq(key, "systemd.crash_chvt") && value) {
329 if (safe_atoi(value, &r) < 0)
330 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
334 } else if (streq(key, "systemd.confirm_spawn") && value) {
336 r = parse_boolean(value);
338 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
340 arg_confirm_spawn = r;
342 } else if (streq(key, "systemd.show_status") && value) {
344 r = parse_show_status(value, &arg_show_status);
346 log_warning("Failed to parse show status switch %s. Ignoring.", value);
348 } else if (streq(key, "systemd.default_standard_output") && value) {
350 r = exec_output_from_string(value);
352 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
354 arg_default_std_output = r;
356 } else if (streq(key, "systemd.default_standard_error") && value) {
358 r = exec_output_from_string(value);
360 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
362 arg_default_std_error = r;
364 } else if (streq(key, "systemd.setenv") && value) {
366 if (env_assignment_is_valid(value)) {
369 env = strv_env_set(arg_default_environment, value);
371 arg_default_environment = env;
373 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
375 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
377 } else if (!streq(key, "systemd.restore_state") &&
378 !streq(key, "systemd.gpt_auto") &&
379 (startswith(key, "systemd.") || startswith(key, "rd.systemd."))) {
383 /* Ignore systemd.journald.xyz and friends */
385 if (startswith(c, "rd."))
387 if (startswith(c, "systemd."))
389 if (c[strcspn(c, ".=")] != '.') {
391 log_warning("Unknown kernel switch %s. Ignoring.", key);
393 log_info("Supported kernel switches:\n"
394 "systemd.unit=UNIT Default unit to start\n"
395 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
396 "systemd.dump_core=0|1 Dump core on crash\n"
397 "systemd.crash_shell=0|1 Run shell on crash\n"
398 "systemd.crash_chvt=N Change to VT #N on crash\n"
399 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
400 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
401 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
403 "systemd.log_level=LEVEL Log level\n"
404 "systemd.log_color=0|1 Highlight important log messages\n"
405 "systemd.log_location=0|1 Include code location in log messages\n"
406 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
407 " Set default log output for services\n"
408 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
409 " Set default log error output for services\n"
410 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n"
411 "systemd.restore_state=0|1 Restore backlight/rfkill state at boot\n");
414 } else if (streq(key, "quiet") && !value) {
415 if (arg_show_status == _SHOW_STATUS_UNSET)
416 arg_show_status = SHOW_STATUS_AUTO;
418 } else if (streq(key, "debug") && !value) {
419 log_set_max_level(LOG_DEBUG);
420 if (detect_container(NULL) > 0)
421 log_set_target(LOG_TARGET_CONSOLE);
423 } else if (!in_initrd() && !value) {
426 /* SysV compatibility */
427 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
428 if (streq(key, rlmap[i]))
429 return set_default_unit(rlmap[i+1]);
435 #define DEFINE_SETTER(name, func, descr) \
436 static int name(const char *unit, \
437 const char *filename, \
439 const char *section, \
440 unsigned section_line, \
441 const char *lvalue, \
443 const char *rvalue, \
455 log_syntax(unit, LOG_ERR, filename, line, -r, \
456 "Invalid " descr "'%s': %s", \
457 rvalue, strerror(-r)); \
462 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
463 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
464 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
465 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
467 static int config_parse_cpu_affinity2(
469 const char *filename,
472 unsigned section_line,
489 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
494 if (!(t = strndup(w, l)))
497 r = safe_atou(t, &cpu);
501 if (!(c = cpu_set_malloc(&ncpus)))
504 if (r < 0 || cpu >= ncpus) {
505 log_syntax(unit, LOG_ERR, filename, line, -r,
506 "Failed to parse CPU affinity '%s'", rvalue);
511 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
515 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
516 log_warning_unit(unit, "Failed to set CPU affinity: %m");
524 static int config_parse_show_status(
526 const char *filename,
529 unsigned section_line,
537 ShowStatus *b = data;
544 k = parse_show_status(rvalue, b);
546 log_syntax(unit, LOG_ERR, filename, line, -k,
547 "Failed to parse show status setting, ignoring: %s", rvalue);
554 static void strv_free_free(char ***l) {
566 static void free_join_controllers(void) {
567 strv_free_free(arg_join_controllers);
568 arg_join_controllers = NULL;
571 static int config_parse_join_controllers(const char *unit,
572 const char *filename,
575 unsigned section_line,
590 free_join_controllers();
592 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
595 s = strndup(w, length);
599 l = strv_split(s, ",");
604 if (strv_length(l) <= 1) {
609 if (!arg_join_controllers) {
610 arg_join_controllers = new(char**, 2);
611 if (!arg_join_controllers) {
616 arg_join_controllers[0] = l;
617 arg_join_controllers[1] = NULL;
624 t = new0(char**, n+2);
632 for (a = arg_join_controllers; *a; a++) {
634 if (strv_overlap(*a, l)) {
635 if (strv_extend_strv(&l, *a) < 0) {
655 t[n++] = strv_uniq(l);
657 strv_free_free(arg_join_controllers);
658 arg_join_controllers = t;
665 static int parse_config_file(void) {
667 const ConfigTableItem items[] = {
668 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
669 { "Manager", "LogTarget", config_parse_target, 0, NULL },
670 { "Manager", "LogColor", config_parse_color, 0, NULL },
671 { "Manager", "LogLocation", config_parse_location, 0, NULL },
672 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
673 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
674 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
675 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
676 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
677 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
678 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
679 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
680 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
682 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
684 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
685 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
686 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
687 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
688 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
689 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
690 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
691 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
692 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
693 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
694 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
695 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
696 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
697 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
698 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
699 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
700 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
701 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
702 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
703 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
704 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
705 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
706 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
707 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
708 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
709 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
710 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
711 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
712 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
716 _cleanup_fclose_ FILE *f;
720 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
726 log_warning("Failed to open configuration file '%s': %m", fn);
730 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
732 log_warning("Failed to parse configuration file: %s", strerror(-r));
737 static int parse_argv(int argc, char *argv[]) {
740 ARG_LOG_LEVEL = 0x100,
749 ARG_DUMP_CONFIGURATION_ITEMS,
756 ARG_DEFAULT_STD_OUTPUT,
757 ARG_DEFAULT_STD_ERROR
760 static const struct option options[] = {
761 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
762 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
763 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
764 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
765 { "unit", required_argument, NULL, ARG_UNIT },
766 { "system", no_argument, NULL, ARG_SYSTEM },
767 { "user", no_argument, NULL, ARG_USER },
768 { "test", no_argument, NULL, ARG_TEST },
769 { "help", no_argument, NULL, 'h' },
770 { "version", no_argument, NULL, ARG_VERSION },
771 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
772 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
773 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
774 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
775 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
776 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
777 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
778 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
779 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
791 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
796 r = log_set_max_level_from_string(optarg);
798 log_error("Failed to parse log level %s.", optarg);
805 r = log_set_target_from_string(optarg);
807 log_error("Failed to parse log target %s.", optarg);
816 r = log_show_color_from_string(optarg);
818 log_error("Failed to parse log color setting %s.", optarg);
822 log_show_color(true);
826 case ARG_LOG_LOCATION:
828 r = log_show_location_from_string(optarg);
830 log_error("Failed to parse log location setting %s.", optarg);
834 log_show_location(true);
838 case ARG_DEFAULT_STD_OUTPUT:
839 r = exec_output_from_string(optarg);
841 log_error("Failed to parse default standard output setting %s.", optarg);
844 arg_default_std_output = r;
847 case ARG_DEFAULT_STD_ERROR:
848 r = exec_output_from_string(optarg);
850 log_error("Failed to parse default standard error output setting %s.", optarg);
853 arg_default_std_error = r;
858 r = set_default_unit(optarg);
860 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
867 arg_running_as = SYSTEMD_SYSTEM;
871 arg_running_as = SYSTEMD_USER;
875 arg_action = ACTION_TEST;
879 arg_action = ACTION_VERSION;
882 case ARG_DUMP_CONFIGURATION_ITEMS:
883 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
887 r = optarg ? parse_boolean(optarg) : 1;
889 log_error("Failed to parse dump core boolean %s.", optarg);
895 case ARG_CRASH_SHELL:
896 r = optarg ? parse_boolean(optarg) : 1;
898 log_error("Failed to parse crash shell boolean %s.", optarg);
904 case ARG_CONFIRM_SPAWN:
905 r = optarg ? parse_boolean(optarg) : 1;
907 log_error("Failed to parse confirm spawn boolean %s.", optarg);
910 arg_confirm_spawn = r;
913 case ARG_SHOW_STATUS:
915 r = parse_show_status(optarg, &arg_show_status);
917 log_error("Failed to parse show status boolean %s.", optarg);
921 arg_show_status = SHOW_STATUS_YES;
924 case ARG_DESERIALIZE: {
928 r = safe_atoi(optarg, &fd);
929 if (r < 0 || fd < 0) {
930 log_error("Failed to parse deserialize option %s.", optarg);
931 return r < 0 ? r : -EINVAL;
934 fd_cloexec(fd, true);
938 log_error("Failed to open serialization fd: %m");
942 if (arg_serialization)
943 fclose(arg_serialization);
945 arg_serialization = f;
950 case ARG_SWITCHED_ROOT:
951 arg_switched_root = true;
955 arg_action = ACTION_HELP;
959 log_set_max_level(LOG_DEBUG);
965 /* Just to eat away the sysvinit kernel
966 * cmdline args without getopt() error
967 * messages that we'll parse in
968 * parse_proc_cmdline_word() or ignore. */
973 log_error("Unknown option code %c", c);
980 if (optind < argc && getpid() != 1) {
981 /* Hmm, when we aren't run as init system
982 * let's complain about excess arguments */
984 log_error("Excess arguments.");
988 if (detect_container(NULL) > 0) {
991 /* All /proc/cmdline arguments the kernel didn't
992 * understand it passed to us. We're not really
993 * interested in that usually since /proc/cmdline is
994 * more interesting and complete. With one exception:
995 * if we are run in a container /proc/cmdline is not
996 * relevant for the container, hence we rely on argv[]
999 for (a = argv; a < argv + argc; a++) {
1000 _cleanup_free_ char *w;
1007 value = strchr(w, '=');
1011 r = parse_proc_cmdline_item(w, value);
1013 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1022 static int help(void) {
1024 printf("%s [OPTIONS...]\n\n"
1025 "Starts up and maintains the system or user services.\n\n"
1026 " -h --help Show this help\n"
1027 " --test Determine startup sequence, dump it and exit\n"
1028 " --dump-configuration-items Dump understood unit configuration items\n"
1029 " --unit=UNIT Set default unit\n"
1030 " --system Run a system instance, even if PID != 1\n"
1031 " --user Run a user instance\n"
1032 " --dump-core[=0|1] Dump core on crash\n"
1033 " --crash-shell[=0|1] Run shell on crash\n"
1034 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1035 " --show-status[=0|1] Show status updates on the console during bootup\n"
1036 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1037 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1038 " --log-color[=0|1] Highlight important log messages\n"
1039 " --log-location[=0|1] Include code location in log messages\n"
1040 " --default-standard-output= Set default standard output for services\n"
1041 " --default-standard-error= Set default standard error output for services\n",
1042 program_invocation_short_name);
1047 static int version(void) {
1048 puts(PACKAGE_STRING);
1049 puts(SYSTEMD_FEATURES);
1054 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1063 r = manager_open_serialization(m, &f);
1065 log_error("Failed to create serialization file: %s", strerror(-r));
1069 /* Make sure nothing is really destructed when we shut down */
1071 bus_manager_send_reloading(m, true);
1076 log_error("Failed to allocate fd set: %s", strerror(-r));
1080 r = manager_serialize(m, f, fds, switching_root);
1082 log_error("Failed to serialize state: %s", strerror(-r));
1086 if (fseeko(f, 0, SEEK_SET) < 0) {
1087 log_error("Failed to rewind serialization fd: %m");
1091 r = fd_cloexec(fileno(f), false);
1093 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1097 r = fdset_cloexec(fds, false);
1099 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1117 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1121 assert(saved_rlimit);
1123 /* Save the original RLIMIT_NOFILE so that we can reset it
1124 * later when transitioning from the initrd to the main
1125 * systemd or suchlike. */
1126 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1127 log_error("Reading RLIMIT_NOFILE failed: %m");
1131 /* Make sure forked processes get the default kernel setting */
1132 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1135 rl = newdup(struct rlimit, saved_rlimit, 1);
1139 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1142 /* Bump up the resource limit for ourselves substantially */
1143 nl.rlim_cur = nl.rlim_max = 64*1024;
1144 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1146 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1153 static void test_mtab(void) {
1156 /* Check that /etc/mtab is a symlink */
1158 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1161 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1168 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1169 "This is not supported anymore. "
1170 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1173 static void test_usr(void) {
1175 /* Check that /usr is not a separate fs */
1177 if (dir_is_empty("/usr") <= 0)
1180 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1181 "Some things will probably break (sometimes even silently) in mysterious ways. "
1182 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1185 static int initialize_join_controllers(void) {
1186 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1187 * + "net_prio". We'd like to add "cpuset" to the mix, but
1188 * "cpuset" does't really work for groups with no initialized
1191 arg_join_controllers = new(char**, 3);
1192 if (!arg_join_controllers)
1195 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1196 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1197 arg_join_controllers[2] = NULL;
1199 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1200 free_join_controllers();
1207 static int enforce_syscall_archs(Set *archs) {
1209 scmp_filter_ctx *seccomp;
1214 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1218 SET_FOREACH(id, arg_syscall_archs, i) {
1219 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1223 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1228 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1230 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1234 r = seccomp_load(seccomp);
1236 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1239 seccomp_release(seccomp);
1246 static int status_welcome(void) {
1247 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1250 r = parse_env_file("/etc/os-release", NEWLINE,
1251 "PRETTY_NAME", &pretty_name,
1252 "ANSI_COLOR", &ansi_color,
1255 if (r < 0 && r != -ENOENT)
1256 log_warning("Failed to read /etc/os-release: %s", strerror(-r));
1258 return status_printf(NULL, false, false,
1259 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1260 isempty(ansi_color) ? "1" : ansi_color,
1261 isempty(pretty_name) ? "Linux" : pretty_name);
1264 int main(int argc, char *argv[]) {
1266 int r, retval = EXIT_FAILURE;
1267 usec_t before_startup, after_startup;
1268 char timespan[FORMAT_TIMESPAN_MAX];
1270 bool reexecute = false;
1271 const char *shutdown_verb = NULL;
1272 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1273 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1274 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1275 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1276 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1277 static char systemd[] = "systemd";
1278 bool skip_setup = false;
1280 bool loaded_policy = false;
1281 bool arm_reboot_watchdog = false;
1282 bool queue_default_job = false;
1283 char *switch_root_dir = NULL, *switch_root_init = NULL;
1284 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1286 #ifdef HAVE_SYSV_COMPAT
1287 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1288 /* This is compatibility support for SysV, where
1289 * calling init as a user is identical to telinit. */
1292 execv(SYSTEMCTL_BINARY_PATH, argv);
1293 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1298 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1299 dual_timestamp_get(&userspace_timestamp);
1301 /* Determine if this is a reexecution or normal bootup. We do
1302 * the full command line parsing much later, so let's just
1303 * have a quick peek here. */
1304 if (strv_find(argv+1, "--deserialize"))
1307 /* If we have switched root, do all the special setup
1309 if (strv_find(argv+1, "--switched-root"))
1312 /* If we get started via the /sbin/init symlink then we are
1313 called 'init'. After a subsequent reexecution we are then
1314 called 'systemd'. That is confusing, hence let's call us
1315 systemd right-away. */
1316 program_invocation_short_name = systemd;
1317 prctl(PR_SET_NAME, systemd);
1322 log_show_color(isatty(STDERR_FILENO) > 0);
1324 /* Disable the umask logic */
1328 if (getpid() == 1 && detect_container(NULL) <= 0) {
1330 /* Running outside of a container as PID 1 */
1331 arg_running_as = SYSTEMD_SYSTEM;
1333 log_set_target(LOG_TARGET_KMSG);
1337 initrd_timestamp = userspace_timestamp;
1340 mount_setup_early();
1341 dual_timestamp_get(&security_start_timestamp);
1342 if (selinux_setup(&loaded_policy) < 0)
1344 if (ima_setup() < 0)
1346 if (smack_setup(&loaded_policy) < 0)
1348 dual_timestamp_get(&security_finish_timestamp);
1351 if (label_init(NULL) < 0)
1355 if (hwclock_is_localtime() > 0) {
1358 /* The first-time call to settimeofday() does a time warp in the kernel */
1359 r = hwclock_set_timezone(&min);
1361 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1363 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1364 } else if (!in_initrd()) {
1366 * Do dummy first-time call to seal the kernel's time warp magic
1368 * Do not call this this from inside the initrd. The initrd might not
1369 * carry /etc/adjtime with LOCAL, but the real system could be set up
1370 * that way. In such case, we need to delay the time-warp or the sealing
1371 * until we reach the real system.
1373 hwclock_reset_timezone();
1375 /* Tell the kernel our timezone */
1376 r = hwclock_set_timezone(NULL);
1378 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1382 /* Set the default for later on, but don't actually
1383 * open the logs like this for now. Note that if we
1384 * are transitioning from the initrd there might still
1385 * be journal fd open, and we shouldn't attempt
1386 * opening that before we parsed /proc/cmdline which
1387 * might redirect output elsewhere. */
1388 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1390 } else if (getpid() == 1) {
1391 /* Running inside a container, as PID 1 */
1392 arg_running_as = SYSTEMD_SYSTEM;
1393 log_set_target(LOG_TARGET_CONSOLE);
1394 log_close_console(); /* force reopen of /dev/console */
1397 /* For the later on, see above... */
1398 log_set_target(LOG_TARGET_JOURNAL);
1400 /* clear the kernel timestamp,
1401 * because we are in a container */
1402 kernel_timestamp.monotonic = 0ULL;
1403 kernel_timestamp.realtime = 0ULL;
1406 /* Running as user instance */
1407 arg_running_as = SYSTEMD_USER;
1408 log_set_target(LOG_TARGET_AUTO);
1411 /* clear the kernel timestamp,
1412 * because we are not PID 1 */
1413 kernel_timestamp.monotonic = 0ULL;
1414 kernel_timestamp.realtime = 0ULL;
1417 /* Initialize default unit */
1418 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1420 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1424 r = initialize_join_controllers();
1428 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1429 * /proc/$PID/fd is available. */
1430 if (getpid() == 1) {
1431 r = mount_setup(loaded_policy);
1436 /* Reset all signal handlers. */
1437 assert_se(reset_all_signal_handlers() == 0);
1439 ignore_signals(SIGNALS_IGNORE, -1);
1441 if (parse_config_file() < 0)
1444 if (arg_running_as == SYSTEMD_SYSTEM)
1445 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1448 log_parse_environment();
1450 if (parse_argv(argc, argv) < 0)
1453 if (arg_action == ACTION_TEST &&
1455 log_error("Don't run test mode as root.");
1459 if (arg_running_as == SYSTEMD_USER &&
1460 arg_action == ACTION_RUN &&
1462 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1466 if (arg_running_as == SYSTEMD_SYSTEM &&
1467 arg_action == ACTION_RUN &&
1468 running_in_chroot() > 0) {
1469 log_error("Cannot be run in a chroot() environment.");
1473 if (arg_action == ACTION_HELP) {
1476 } else if (arg_action == ACTION_VERSION) {
1479 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1480 unit_dump_config_items(stdout);
1481 retval = EXIT_SUCCESS;
1483 } else if (arg_action == ACTION_DONE) {
1484 retval = EXIT_SUCCESS;
1488 if (arg_running_as == SYSTEMD_USER &&
1489 !getenv("XDG_RUNTIME_DIR")) {
1490 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1494 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1496 /* Close logging fds, in order not to confuse fdset below */
1499 /* Remember open file descriptors for later deserialization */
1500 r = fdset_new_fill(&fds);
1502 log_error("Failed to allocate fd set: %s", strerror(-r));
1505 fdset_cloexec(fds, true);
1507 if (arg_serialization)
1508 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1510 if (arg_running_as == SYSTEMD_SYSTEM)
1511 /* Become a session leader if we aren't one yet. */
1514 /* Move out of the way, so that we won't block unmounts */
1515 assert_se(chdir("/") == 0);
1517 /* Reset the console, but only if this is really init and we
1518 * are freshly booted */
1519 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1520 console_setup(getpid() == 1 && !skip_setup);
1522 /* Open the logging devices, if possible and necessary */
1525 if (arg_show_status == _SHOW_STATUS_UNSET)
1526 arg_show_status = SHOW_STATUS_YES;
1528 /* Make sure we leave a core dump without panicing the
1530 if (getpid() == 1) {
1531 install_crash_handler();
1533 r = mount_cgroup_controllers(arg_join_controllers);
1538 if (arg_running_as == SYSTEMD_SYSTEM) {
1539 const char *virtualization = NULL;
1541 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1543 detect_virtualization(&virtualization);
1545 log_info("Detected virtualization '%s'.", virtualization);
1547 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1550 log_info("Running in initial RAM disk.");
1553 _cleanup_free_ char *t = uid_to_name(getuid());
1554 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1558 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1559 if (arg_show_status > 0 || plymouth_running())
1563 if (detect_container(NULL) <= 0)
1567 machine_id_setup("");
1574 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1575 watchdog_set_timeout(&arg_runtime_watchdog);
1577 if (arg_timer_slack_nsec != (nsec_t) -1)
1578 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1579 log_error("Failed to adjust timer slack: %m");
1581 if (arg_capability_bounding_set_drop) {
1582 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1584 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1587 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1589 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1594 if (arg_syscall_archs) {
1595 r = enforce_syscall_archs(arg_syscall_archs);
1600 if (arg_running_as == SYSTEMD_USER) {
1601 /* Become reaper of our children */
1602 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1603 log_warning("Failed to make us a subreaper: %m");
1604 if (errno == EINVAL)
1605 log_info("Perhaps the kernel version is too old (< 3.4?)");
1609 if (arg_running_as == SYSTEMD_SYSTEM)
1610 bump_rlimit_nofile(&saved_rlimit_nofile);
1612 r = manager_new(arg_running_as, &m);
1614 log_error("Failed to allocate manager object: %s", strerror(-r));
1618 m->confirm_spawn = arg_confirm_spawn;
1619 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1620 m->default_std_output = arg_default_std_output;
1621 m->default_std_error = arg_default_std_error;
1622 m->default_restart_usec = arg_default_restart_usec;
1623 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1624 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1625 m->default_start_limit_interval = arg_default_start_limit_interval;
1626 m->default_start_limit_burst = arg_default_start_limit_burst;
1627 m->default_cpu_accounting = arg_default_cpu_accounting;
1628 m->default_blockio_accounting = arg_default_blockio_accounting;
1629 m->default_memory_accounting = arg_default_memory_accounting;
1630 m->runtime_watchdog = arg_runtime_watchdog;
1631 m->shutdown_watchdog = arg_shutdown_watchdog;
1632 m->userspace_timestamp = userspace_timestamp;
1633 m->kernel_timestamp = kernel_timestamp;
1634 m->initrd_timestamp = initrd_timestamp;
1635 m->security_start_timestamp = security_start_timestamp;
1636 m->security_finish_timestamp = security_finish_timestamp;
1638 manager_set_default_rlimits(m, arg_default_rlimit);
1639 manager_environment_add(m, NULL, arg_default_environment);
1640 manager_set_show_status(m, arg_show_status);
1642 /* Remember whether we should queue the default job */
1643 queue_default_job = !arg_serialization || arg_switched_root;
1645 before_startup = now(CLOCK_MONOTONIC);
1647 r = manager_startup(m, arg_serialization, fds);
1649 log_error("Failed to fully start up daemon: %s", strerror(-r));
1651 /* This will close all file descriptors that were opened, but
1652 * not claimed by any unit. */
1656 if (arg_serialization) {
1657 fclose(arg_serialization);
1658 arg_serialization = NULL;
1661 if (queue_default_job) {
1662 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1663 Unit *target = NULL;
1664 Job *default_unit_job;
1666 log_debug("Activating default unit: %s", arg_default_unit);
1668 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1670 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1671 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1672 log_error("Failed to load default target: %s", strerror(-target->load_error));
1673 else if (target->load_state == UNIT_MASKED)
1674 log_error("Default target masked.");
1676 if (!target || target->load_state != UNIT_LOADED) {
1677 log_info("Trying to load rescue target...");
1679 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1681 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1683 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1684 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1686 } else if (target->load_state == UNIT_MASKED) {
1687 log_error("Rescue target masked.");
1692 assert(target->load_state == UNIT_LOADED);
1694 if (arg_action == ACTION_TEST) {
1695 printf("-> By units:\n");
1696 manager_dump_units(m, stdout, "\t");
1699 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1701 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1703 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1705 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1709 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1713 m->default_unit_job_id = default_unit_job->id;
1715 after_startup = now(CLOCK_MONOTONIC);
1716 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1717 "Loaded units and determined initial transaction in %s.",
1718 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1720 if (arg_action == ACTION_TEST) {
1721 printf("-> By jobs:\n");
1722 manager_dump_jobs(m, stdout, "\t");
1723 retval = EXIT_SUCCESS;
1729 r = manager_loop(m);
1731 log_error("Failed to run mainloop: %s", strerror(-r));
1735 switch (m->exit_code) {
1738 retval = EXIT_SUCCESS;
1742 case MANAGER_RELOAD:
1743 log_info("Reloading.");
1744 r = manager_reload(m);
1746 log_error("Failed to reload: %s", strerror(-r));
1749 case MANAGER_REEXECUTE:
1751 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1755 log_notice("Reexecuting.");
1758 case MANAGER_SWITCH_ROOT:
1759 /* Steal the switch root parameters */
1760 switch_root_dir = m->switch_root;
1761 switch_root_init = m->switch_root_init;
1762 m->switch_root = m->switch_root_init = NULL;
1764 if (!switch_root_init)
1765 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1769 log_notice("Switching root.");
1772 case MANAGER_REBOOT:
1773 case MANAGER_POWEROFF:
1775 case MANAGER_KEXEC: {
1776 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1777 [MANAGER_REBOOT] = "reboot",
1778 [MANAGER_POWEROFF] = "poweroff",
1779 [MANAGER_HALT] = "halt",
1780 [MANAGER_KEXEC] = "kexec"
1783 assert_se(shutdown_verb = table[m->exit_code]);
1784 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1786 log_notice("Shutting down.");
1791 assert_not_reached("Unknown exit code.");
1801 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1802 free(arg_default_rlimit[j]);
1803 arg_default_rlimit[j] = NULL;
1806 free(arg_default_unit);
1807 arg_default_unit = NULL;
1809 free_join_controllers();
1811 strv_free(arg_default_environment);
1812 arg_default_environment = NULL;
1814 set_free(arg_syscall_archs);
1815 arg_syscall_archs = NULL;
1821 unsigned i, args_size;
1823 /* Close and disarm the watchdog, so that the new
1824 * instance can reinitialize it, but doesn't get
1825 * rebooted while we do that */
1826 watchdog_close(true);
1828 /* Reset the RLIMIT_NOFILE to the kernel default, so
1829 * that the new systemd can pass the kernel default to
1830 * its child processes */
1831 if (saved_rlimit_nofile.rlim_cur > 0)
1832 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1834 if (switch_root_dir) {
1835 /* Kill all remaining processes from the
1836 * initrd, but don't wait for them, so that we
1837 * can handle the SIGCHLD for them after
1839 broadcast_signal(SIGTERM, false, true);
1841 /* And switch root */
1842 r = switch_root(switch_root_dir);
1844 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1847 args_size = MAX(6, argc+1);
1848 args = newa(const char*, args_size);
1850 if (!switch_root_init) {
1853 /* First try to spawn ourselves with the right
1854 * path, and with full serialization. We do
1855 * this only if the user didn't specify an
1856 * explicit init to spawn. */
1858 assert(arg_serialization);
1861 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1865 args[i++] = SYSTEMD_BINARY_PATH;
1866 if (switch_root_dir)
1867 args[i++] = "--switched-root";
1868 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1869 args[i++] = "--deserialize";
1873 /* do not pass along the environment we inherit from the kernel or initrd */
1874 if (switch_root_dir)
1877 assert(i <= args_size);
1878 execv(args[0], (char* const*) args);
1881 /* Try the fallback, if there is any, without any
1882 * serialization. We pass the original argv[] and
1883 * envp[]. (Well, modulo the ordering changes due to
1884 * getopt() in argv[], and some cleanups in envp[],
1885 * but let's hope that doesn't matter.) */
1887 if (arg_serialization) {
1888 fclose(arg_serialization);
1889 arg_serialization = NULL;
1897 /* Reopen the console */
1898 make_console_stdio();
1900 for (j = 1, i = 1; j < (unsigned) argc; j++)
1901 args[i++] = argv[j];
1903 assert(i <= args_size);
1905 if (switch_root_init) {
1906 args[0] = switch_root_init;
1907 execv(args[0], (char* const*) args);
1908 log_warning("Failed to execute configured init, trying fallback: %m");
1911 args[0] = "/sbin/init";
1912 execv(args[0], (char* const*) args);
1914 if (errno == ENOENT) {
1915 log_warning("No /sbin/init, trying fallback");
1917 args[0] = "/bin/sh";
1919 execv(args[0], (char* const*) args);
1920 log_error("Failed to execute /bin/sh, giving up: %m");
1922 log_warning("Failed to execute /sbin/init, giving up: %m");
1925 if (arg_serialization) {
1926 fclose(arg_serialization);
1927 arg_serialization = NULL;
1935 #ifdef HAVE_VALGRIND_VALGRIND_H
1936 /* If we are PID 1 and running under valgrind, then let's exit
1937 * here explicitly. valgrind will only generate nice output on
1938 * exit(), not on exec(), hence let's do the former not the
1940 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1944 if (shutdown_verb) {
1945 char log_level[DECIMAL_STR_MAX(int) + 1];
1946 const char* command_line[9] = {
1947 SYSTEMD_SHUTDOWN_BINARY_PATH,
1949 "--log-level", log_level,
1953 _cleanup_strv_free_ char **env_block = NULL;
1955 assert(command_line[pos] == NULL);
1956 env_block = strv_copy(environ);
1958 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1960 switch (log_get_target()) {
1961 case LOG_TARGET_KMSG:
1962 case LOG_TARGET_JOURNAL_OR_KMSG:
1963 case LOG_TARGET_SYSLOG_OR_KMSG:
1964 command_line[pos++] = "kmsg";
1967 case LOG_TARGET_CONSOLE:
1969 command_line[pos++] = "console";
1973 if (log_get_show_color())
1974 command_line[pos++] = "--log-color";
1976 if (log_get_show_location())
1977 command_line[pos++] = "--log-location";
1979 assert(pos < ELEMENTSOF(command_line));
1981 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1984 /* If we reboot let's set the shutdown
1985 * watchdog and tell the shutdown binary to
1986 * repeatedly ping it */
1987 watchdog_set_timeout(&arg_shutdown_watchdog);
1988 watchdog_close(false);
1990 /* Tell the binary how often to ping, ignore failure */
1991 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
1992 strv_push(&env_block, e);
1994 watchdog_close(true);
1996 /* Avoid the creation of new processes forked by the
1997 * kernel; at this point, we will not listen to the
1999 if (detect_container(NULL) <= 0)
2000 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2002 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2003 log_error("Failed to execute shutdown binary, %s: %m",
2004 getpid() == 1 ? "freezing" : "quitting");