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"
58 #include "architecture.h"
60 #include "path-util.h"
61 #include "switch-root.h"
62 #include "capability.h"
65 #include "clock-util.h"
67 #include "dbus-manager.h"
68 #include "bus-error.h"
71 #include "mount-setup.h"
72 #include "loopback-setup.h"
73 #include "hostname-setup.h"
74 #include "machine-id-setup.h"
75 #include "selinux-setup.h"
76 #include "ima-setup.h"
77 #include "smack-setup.h"
78 #include "kmod-setup.h"
85 ACTION_DUMP_CONFIGURATION_ITEMS,
87 } arg_action = ACTION_RUN;
88 static char *arg_default_unit = NULL;
89 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
90 static bool arg_dump_core = true;
91 static bool arg_crash_shell = false;
92 static int arg_crash_chvt = -1;
93 static bool arg_confirm_spawn = false;
94 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
95 static bool arg_switched_root = false;
96 static int arg_no_pager = -1;
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_INFINITY;
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 static void pager_open_if_enabled(void) {
122 if (arg_no_pager <= 0)
128 noreturn static void crash(int sig) {
131 /* Pass this on immediately, if this is not PID 1 */
133 else if (!arg_dump_core)
134 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
136 struct sigaction sa = {
137 .sa_handler = nop_handler,
138 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
142 /* We want to wait for the core process, hence let's enable SIGCHLD */
143 sigaction(SIGCHLD, &sa, NULL);
147 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
150 struct rlimit rl = {};
152 /* Enable default signal handler for core dump */
154 sa.sa_handler = SIG_DFL;
155 sigaction(sig, &sa, NULL);
157 /* Don't limit the core dump size */
158 rl.rlim_cur = RLIM_INFINITY;
159 rl.rlim_max = RLIM_INFINITY;
160 setrlimit(RLIMIT_CORE, &rl);
162 /* Just to be sure... */
165 /* Raise the signal again */
168 assert_not_reached("We shouldn't be here...");
175 /* Order things nicely. */
176 r = wait_for_terminate(pid, &status);
178 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
179 else if (status.si_code != CLD_DUMPED)
180 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
182 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
187 chvt(arg_crash_chvt);
189 if (arg_crash_shell) {
190 struct sigaction sa = {
191 .sa_handler = SIG_IGN,
192 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
196 log_info("Executing crash shell in 10s...");
199 /* Let the kernel reap children for us */
200 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
204 log_error("Failed to fork off crash shell: %m");
206 make_console_stdio();
207 execl("/bin/sh", "/bin/sh", NULL);
209 log_error("execl() failed: %m");
213 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
216 log_info("Freezing execution.");
220 static void install_crash_handler(void) {
221 struct sigaction sa = {
223 .sa_flags = SA_NODEFER,
226 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
229 static int console_setup(void) {
230 _cleanup_close_ int tty_fd = -1;
233 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
235 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
239 /* We don't want to force text mode. plymouth may be showing
240 * pictures already from initrd. */
241 r = reset_terminal_fd(tty_fd, false);
243 log_error("Failed to reset /dev/console: %s", strerror(-r));
250 static int set_default_unit(const char *u) {
259 free(arg_default_unit);
260 arg_default_unit = c;
265 static int parse_proc_cmdline_item(const char *key, const char *value) {
267 static const char * const rlmap[] = {
268 "emergency", SPECIAL_EMERGENCY_TARGET,
269 "-b", SPECIAL_EMERGENCY_TARGET,
270 "rescue", SPECIAL_RESCUE_TARGET,
271 "single", SPECIAL_RESCUE_TARGET,
272 "-s", SPECIAL_RESCUE_TARGET,
273 "s", SPECIAL_RESCUE_TARGET,
274 "S", SPECIAL_RESCUE_TARGET,
275 "1", SPECIAL_RESCUE_TARGET,
276 "2", SPECIAL_RUNLEVEL2_TARGET,
277 "3", SPECIAL_RUNLEVEL3_TARGET,
278 "4", SPECIAL_RUNLEVEL4_TARGET,
279 "5", SPECIAL_RUNLEVEL5_TARGET,
285 if (streq(key, "systemd.unit") && value) {
288 return set_default_unit(value);
290 } else if (streq(key, "rd.systemd.unit") && value) {
293 return set_default_unit(value);
295 } else if (streq(key, "systemd.dump_core") && value) {
297 r = parse_boolean(value);
299 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
303 } else if (streq(key, "systemd.crash_shell") && value) {
305 r = parse_boolean(value);
307 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
311 } else if (streq(key, "systemd.crash_chvt") && value) {
313 if (safe_atoi(value, &r) < 0)
314 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
318 } else if (streq(key, "systemd.confirm_spawn") && value) {
320 r = parse_boolean(value);
322 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
324 arg_confirm_spawn = r;
326 } else if (streq(key, "systemd.show_status") && value) {
328 r = parse_show_status(value, &arg_show_status);
330 log_warning("Failed to parse show status switch %s. Ignoring.", value);
332 } else if (streq(key, "systemd.default_standard_output") && value) {
334 r = exec_output_from_string(value);
336 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
338 arg_default_std_output = r;
340 } else if (streq(key, "systemd.default_standard_error") && value) {
342 r = exec_output_from_string(value);
344 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
346 arg_default_std_error = r;
348 } else if (streq(key, "systemd.setenv") && value) {
350 if (env_assignment_is_valid(value)) {
353 env = strv_env_set(arg_default_environment, value);
355 arg_default_environment = env;
357 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
359 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
361 } else if (streq(key, "quiet") && !value) {
363 log_set_max_level(LOG_NOTICE);
365 if (arg_show_status == _SHOW_STATUS_UNSET)
366 arg_show_status = SHOW_STATUS_AUTO;
368 } else if (streq(key, "debug") && !value) {
370 /* Note that log_parse_environment() handles 'debug'
371 * too, and sets the log level to LOG_DEBUG. */
373 if (detect_container(NULL) > 0)
374 log_set_target(LOG_TARGET_CONSOLE);
376 } else if (!in_initrd() && !value) {
379 /* SysV compatibility */
380 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
381 if (streq(key, rlmap[i]))
382 return set_default_unit(rlmap[i+1]);
388 #define DEFINE_SETTER(name, func, descr) \
389 static int name(const char *unit, \
390 const char *filename, \
392 const char *section, \
393 unsigned section_line, \
394 const char *lvalue, \
396 const char *rvalue, \
408 log_syntax(unit, LOG_ERR, filename, line, -r, \
409 "Invalid " descr "'%s': %s", \
410 rvalue, strerror(-r)); \
415 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
416 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
417 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
418 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
420 static int config_parse_cpu_affinity2(
422 const char *filename,
425 unsigned section_line,
432 const char *word, *state;
441 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
446 if (!(t = strndup(word, l)))
449 r = safe_atou(t, &cpu);
453 if (!(c = cpu_set_malloc(&ncpus)))
456 if (r < 0 || cpu >= ncpus) {
457 log_syntax(unit, LOG_ERR, filename, line, -r,
458 "Failed to parse CPU affinity '%s'", rvalue);
463 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
466 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
467 "Trailing garbage, ignoring.");
470 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
471 log_warning_unit(unit, "Failed to set CPU affinity: %m");
479 static int config_parse_show_status(
481 const char *filename,
484 unsigned section_line,
492 ShowStatus *b = data;
499 k = parse_show_status(rvalue, b);
501 log_syntax(unit, LOG_ERR, filename, line, -k,
502 "Failed to parse show status setting, ignoring: %s", rvalue);
509 static void strv_free_free(char ***l) {
521 static void free_join_controllers(void) {
522 strv_free_free(arg_join_controllers);
523 arg_join_controllers = NULL;
526 static int config_parse_join_controllers(const char *unit,
527 const char *filename,
530 unsigned section_line,
538 const char *word, *state;
545 free_join_controllers();
547 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
550 s = strndup(word, length);
554 l = strv_split(s, ",");
559 if (strv_length(l) <= 1) {
564 if (!arg_join_controllers) {
565 arg_join_controllers = new(char**, 2);
566 if (!arg_join_controllers) {
571 arg_join_controllers[0] = l;
572 arg_join_controllers[1] = NULL;
579 t = new0(char**, n+2);
587 for (a = arg_join_controllers; *a; a++) {
589 if (strv_overlap(*a, l)) {
590 if (strv_extend_strv(&l, *a) < 0) {
610 t[n++] = strv_uniq(l);
612 strv_free_free(arg_join_controllers);
613 arg_join_controllers = t;
617 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
618 "Trailing garbage, ignoring.");
623 static int parse_config_file(void) {
625 const ConfigTableItem items[] = {
626 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
627 { "Manager", "LogTarget", config_parse_target, 0, NULL },
628 { "Manager", "LogColor", config_parse_color, 0, NULL },
629 { "Manager", "LogLocation", config_parse_location, 0, NULL },
630 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
631 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
632 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
633 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
634 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
635 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
636 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
637 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
638 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
640 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
642 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
643 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
644 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
645 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
646 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
647 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
648 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
649 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
650 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
651 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
652 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
653 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
654 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
655 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
656 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
657 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
658 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
659 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
660 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
661 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
662 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
663 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
664 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
665 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
666 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
667 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
668 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
669 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
670 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
676 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
677 config_parse(NULL, fn, NULL,
679 config_item_table_lookup, items,
680 false, false, true, NULL);
685 static int parse_argv(int argc, char *argv[]) {
688 ARG_LOG_LEVEL = 0x100,
698 ARG_DUMP_CONFIGURATION_ITEMS,
705 ARG_DEFAULT_STD_OUTPUT,
706 ARG_DEFAULT_STD_ERROR
709 static const struct option options[] = {
710 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
711 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
712 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
713 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
714 { "unit", required_argument, NULL, ARG_UNIT },
715 { "system", no_argument, NULL, ARG_SYSTEM },
716 { "user", no_argument, NULL, ARG_USER },
717 { "test", no_argument, NULL, ARG_TEST },
718 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
719 { "help", no_argument, NULL, 'h' },
720 { "version", no_argument, NULL, ARG_VERSION },
721 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
722 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
723 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
724 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
725 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
726 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
727 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
728 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
729 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
741 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
746 r = log_set_max_level_from_string(optarg);
748 log_error("Failed to parse log level %s.", optarg);
755 r = log_set_target_from_string(optarg);
757 log_error("Failed to parse log target %s.", optarg);
766 r = log_show_color_from_string(optarg);
768 log_error("Failed to parse log color setting %s.", optarg);
772 log_show_color(true);
776 case ARG_LOG_LOCATION:
778 r = log_show_location_from_string(optarg);
780 log_error("Failed to parse log location setting %s.", optarg);
784 log_show_location(true);
788 case ARG_DEFAULT_STD_OUTPUT:
789 r = exec_output_from_string(optarg);
791 log_error("Failed to parse default standard output setting %s.", optarg);
794 arg_default_std_output = r;
797 case ARG_DEFAULT_STD_ERROR:
798 r = exec_output_from_string(optarg);
800 log_error("Failed to parse default standard error output setting %s.", optarg);
803 arg_default_std_error = r;
808 r = set_default_unit(optarg);
810 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
817 arg_running_as = SYSTEMD_SYSTEM;
821 arg_running_as = SYSTEMD_USER;
825 arg_action = ACTION_TEST;
826 if (arg_no_pager < 0)
835 arg_action = ACTION_VERSION;
838 case ARG_DUMP_CONFIGURATION_ITEMS:
839 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
843 r = optarg ? parse_boolean(optarg) : 1;
845 log_error("Failed to parse dump core boolean %s.", optarg);
851 case ARG_CRASH_SHELL:
852 r = optarg ? parse_boolean(optarg) : 1;
854 log_error("Failed to parse crash shell boolean %s.", optarg);
860 case ARG_CONFIRM_SPAWN:
861 r = optarg ? parse_boolean(optarg) : 1;
863 log_error("Failed to parse confirm spawn boolean %s.", optarg);
866 arg_confirm_spawn = r;
869 case ARG_SHOW_STATUS:
871 r = parse_show_status(optarg, &arg_show_status);
873 log_error("Failed to parse show status boolean %s.", optarg);
877 arg_show_status = SHOW_STATUS_YES;
880 case ARG_DESERIALIZE: {
884 r = safe_atoi(optarg, &fd);
885 if (r < 0 || fd < 0) {
886 log_error("Failed to parse deserialize option %s.", optarg);
887 return r < 0 ? r : -EINVAL;
890 fd_cloexec(fd, true);
894 log_error("Failed to open serialization fd: %m");
898 if (arg_serialization)
899 fclose(arg_serialization);
901 arg_serialization = f;
906 case ARG_SWITCHED_ROOT:
907 arg_switched_root = true;
911 arg_action = ACTION_HELP;
912 if (arg_no_pager < 0)
917 log_set_max_level(LOG_DEBUG);
923 /* Just to eat away the sysvinit kernel
924 * cmdline args without getopt() error
925 * messages that we'll parse in
926 * parse_proc_cmdline_word() or ignore. */
935 assert_not_reached("Unhandled option code.");
938 if (optind < argc && getpid() != 1) {
939 /* Hmm, when we aren't run as init system
940 * let's complain about excess arguments */
942 log_error("Excess arguments.");
949 static int help(void) {
951 printf("%s [OPTIONS...]\n\n"
952 "Starts up and maintains the system or user services.\n\n"
953 " -h --help Show this help\n"
954 " --test Determine startup sequence, dump it and exit\n"
955 " --no-pager Do not pipe output into a pager\n"
956 " --dump-configuration-items Dump understood unit configuration items\n"
957 " --unit=UNIT Set default unit\n"
958 " --system Run a system instance, even if PID != 1\n"
959 " --user Run a user instance\n"
960 " --dump-core[=0|1] Dump core on crash\n"
961 " --crash-shell[=0|1] Run shell on crash\n"
962 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
963 " --show-status[=0|1] Show status updates on the console during bootup\n"
964 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
965 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
966 " --log-color[=0|1] Highlight important log messages\n"
967 " --log-location[=0|1] Include code location in log messages\n"
968 " --default-standard-output= Set default standard output for services\n"
969 " --default-standard-error= Set default standard error output for services\n",
970 program_invocation_short_name);
975 static int version(void) {
976 puts(PACKAGE_STRING);
977 puts(SYSTEMD_FEATURES);
982 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
991 r = manager_open_serialization(m, &f);
993 log_error("Failed to create serialization file: %s", strerror(-r));
997 /* Make sure nothing is really destructed when we shut down */
999 bus_manager_send_reloading(m, true);
1004 log_error("Failed to allocate fd set: %s", strerror(-r));
1008 r = manager_serialize(m, f, fds, switching_root);
1010 log_error("Failed to serialize state: %s", strerror(-r));
1014 if (fseeko(f, 0, SEEK_SET) < 0) {
1015 log_error("Failed to rewind serialization fd: %m");
1019 r = fd_cloexec(fileno(f), false);
1021 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1025 r = fdset_cloexec(fds, false);
1027 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1045 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1049 assert(saved_rlimit);
1051 /* Save the original RLIMIT_NOFILE so that we can reset it
1052 * later when transitioning from the initrd to the main
1053 * systemd or suchlike. */
1054 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1055 log_error("Reading RLIMIT_NOFILE failed: %m");
1059 /* Make sure forked processes get the default kernel setting */
1060 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1063 rl = newdup(struct rlimit, saved_rlimit, 1);
1067 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1070 /* Bump up the resource limit for ourselves substantially */
1071 nl.rlim_cur = nl.rlim_max = 64*1024;
1072 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1074 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1081 static void test_mtab(void) {
1083 static const char ok[] =
1084 "/proc/self/mounts\0"
1086 "../proc/self/mounts\0"
1089 _cleanup_free_ char *p = NULL;
1092 /* Check that /etc/mtab is a symlink to the right place or
1093 * non-existing. But certainly not a file, or a symlink to
1094 * some weird place... */
1096 r = readlink_malloc("/etc/mtab", &p);
1099 if (r >= 0 && nulstr_contains(ok, p))
1102 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1103 "This is not supported anymore. "
1104 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1107 static void test_usr(void) {
1109 /* Check that /usr is not a separate fs */
1111 if (dir_is_empty("/usr") <= 0)
1114 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1115 "Some things will probably break (sometimes even silently) in mysterious ways. "
1116 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1119 static int initialize_join_controllers(void) {
1120 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1121 * + "net_prio". We'd like to add "cpuset" to the mix, but
1122 * "cpuset" does't really work for groups with no initialized
1125 arg_join_controllers = new(char**, 3);
1126 if (!arg_join_controllers)
1129 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1130 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1131 arg_join_controllers[2] = NULL;
1133 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1134 free_join_controllers();
1141 static int enforce_syscall_archs(Set *archs) {
1143 scmp_filter_ctx *seccomp;
1148 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1152 SET_FOREACH(id, arg_syscall_archs, i) {
1153 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1157 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1162 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1164 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1168 r = seccomp_load(seccomp);
1170 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1173 seccomp_release(seccomp);
1180 static int status_welcome(void) {
1181 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1184 r = parse_env_file("/etc/os-release", NEWLINE,
1185 "PRETTY_NAME", &pretty_name,
1186 "ANSI_COLOR", &ansi_color,
1189 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1190 "PRETTY_NAME", &pretty_name,
1191 "ANSI_COLOR", &ansi_color,
1195 if (r < 0 && r != -ENOENT)
1196 log_warning("Failed to read os-release file: %s", strerror(-r));
1198 return status_printf(NULL, false, false,
1199 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1200 isempty(ansi_color) ? "1" : ansi_color,
1201 isempty(pretty_name) ? "Linux" : pretty_name);
1204 static int write_container_id(void) {
1207 c = getenv("container");
1211 return write_string_file("/run/systemd/container", c);
1214 int main(int argc, char *argv[]) {
1216 int r, retval = EXIT_FAILURE;
1217 usec_t before_startup, after_startup;
1218 char timespan[FORMAT_TIMESPAN_MAX];
1220 bool reexecute = false;
1221 const char *shutdown_verb = NULL;
1222 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1223 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1224 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1225 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1226 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1227 static char systemd[] = "systemd";
1228 bool skip_setup = false;
1230 bool loaded_policy = false;
1231 bool arm_reboot_watchdog = false;
1232 bool queue_default_job = false;
1233 bool empty_etc = false;
1234 char *switch_root_dir = NULL, *switch_root_init = NULL;
1235 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1237 #ifdef HAVE_SYSV_COMPAT
1238 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1239 /* This is compatibility support for SysV, where
1240 * calling init as a user is identical to telinit. */
1243 execv(SYSTEMCTL_BINARY_PATH, argv);
1244 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1249 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1250 dual_timestamp_get(&userspace_timestamp);
1252 /* Determine if this is a reexecution or normal bootup. We do
1253 * the full command line parsing much later, so let's just
1254 * have a quick peek here. */
1255 if (strv_find(argv+1, "--deserialize"))
1258 /* If we have switched root, do all the special setup
1260 if (strv_find(argv+1, "--switched-root"))
1263 /* If we get started via the /sbin/init symlink then we are
1264 called 'init'. After a subsequent reexecution we are then
1265 called 'systemd'. That is confusing, hence let's call us
1266 systemd right-away. */
1267 program_invocation_short_name = systemd;
1268 prctl(PR_SET_NAME, systemd);
1273 log_show_color(isatty(STDERR_FILENO) > 0);
1274 log_set_upgrade_syslog_to_journal(true);
1276 /* Disable the umask logic */
1280 if (getpid() == 1 && detect_container(NULL) <= 0) {
1282 /* Running outside of a container as PID 1 */
1283 arg_running_as = SYSTEMD_SYSTEM;
1285 log_set_target(LOG_TARGET_KMSG);
1289 initrd_timestamp = userspace_timestamp;
1292 mount_setup_early();
1293 dual_timestamp_get(&security_start_timestamp);
1294 if (mac_selinux_setup(&loaded_policy) < 0)
1296 if (ima_setup() < 0)
1298 if (mac_smack_setup(&loaded_policy) < 0)
1300 dual_timestamp_get(&security_finish_timestamp);
1303 if (mac_selinux_init(NULL) < 0)
1307 if (clock_is_localtime() > 0) {
1311 * The very first call of settimeofday() also does a time warp in the kernel.
1313 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1314 * external tools to take care of maintaining the RTC and do all adjustments.
1315 * This matches the behavior of Windows, which leaves the RTC alone if the
1316 * registry tells that the RTC runs in UTC.
1318 r = clock_set_timezone(&min);
1320 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1322 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1323 } else if (!in_initrd()) {
1325 * Do a dummy very first call to seal the kernel's time warp magic.
1327 * Do not call this this from inside the initrd. The initrd might not
1328 * carry /etc/adjtime with LOCAL, but the real system could be set up
1329 * that way. In such case, we need to delay the time-warp or the sealing
1330 * until we reach the real system.
1332 * Do no set the kernel's timezone. The concept of local time cannot
1333 * be supported reliably, the time will jump or be incorrect at every daylight
1334 * saving time change. All kernel local time concepts will be treated
1337 clock_reset_timewarp();
1341 /* Set the default for later on, but don't actually
1342 * open the logs like this for now. Note that if we
1343 * are transitioning from the initrd there might still
1344 * be journal fd open, and we shouldn't attempt
1345 * opening that before we parsed /proc/cmdline which
1346 * might redirect output elsewhere. */
1347 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1349 } else if (getpid() == 1) {
1350 /* Running inside a container, as PID 1 */
1351 arg_running_as = SYSTEMD_SYSTEM;
1352 log_set_target(LOG_TARGET_CONSOLE);
1353 log_close_console(); /* force reopen of /dev/console */
1356 /* For the later on, see above... */
1357 log_set_target(LOG_TARGET_JOURNAL);
1359 /* clear the kernel timestamp,
1360 * because we are in a container */
1361 kernel_timestamp.monotonic = 0ULL;
1362 kernel_timestamp.realtime = 0ULL;
1365 /* Running as user instance */
1366 arg_running_as = SYSTEMD_USER;
1367 log_set_target(LOG_TARGET_AUTO);
1370 /* clear the kernel timestamp,
1371 * because we are not PID 1 */
1372 kernel_timestamp.monotonic = 0ULL;
1373 kernel_timestamp.realtime = 0ULL;
1376 /* Initialize default unit */
1377 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1379 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1383 r = initialize_join_controllers();
1387 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1388 * /proc/$PID/fd is available. */
1389 if (getpid() == 1) {
1391 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1395 r = mount_setup(loaded_policy);
1400 /* Reset all signal handlers. */
1401 assert_se(reset_all_signal_handlers() == 0);
1403 ignore_signals(SIGNALS_IGNORE, -1);
1405 if (parse_config_file() < 0)
1408 if (arg_running_as == SYSTEMD_SYSTEM) {
1409 r = parse_proc_cmdline(parse_proc_cmdline_item);
1411 log_warning("Failed to parse kernel command line, ignoring: %s", strerror(-r));
1414 /* Note that this also parses bits from the kernel command
1415 * line, including "debug". */
1416 log_parse_environment();
1418 if (parse_argv(argc, argv) < 0)
1421 if (arg_action == ACTION_TEST &&
1423 log_error("Don't run test mode as root.");
1427 if (arg_running_as == SYSTEMD_USER &&
1428 arg_action == ACTION_RUN &&
1430 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1434 if (arg_running_as == SYSTEMD_SYSTEM &&
1435 arg_action == ACTION_RUN &&
1436 running_in_chroot() > 0) {
1437 log_error("Cannot be run in a chroot() environment.");
1441 if (arg_action == ACTION_TEST)
1444 pager_open_if_enabled();
1446 if (arg_action == ACTION_HELP) {
1449 } else if (arg_action == ACTION_VERSION) {
1452 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1453 unit_dump_config_items(stdout);
1454 retval = EXIT_SUCCESS;
1456 } else if (arg_action == ACTION_DONE) {
1457 retval = EXIT_SUCCESS;
1461 if (arg_running_as == SYSTEMD_USER &&
1462 !getenv("XDG_RUNTIME_DIR")) {
1463 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1467 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1469 /* Close logging fds, in order not to confuse fdset below */
1472 /* Remember open file descriptors for later deserialization */
1473 r = fdset_new_fill(&fds);
1475 log_error("Failed to allocate fd set: %s", strerror(-r));
1478 fdset_cloexec(fds, true);
1480 if (arg_serialization)
1481 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1483 if (arg_running_as == SYSTEMD_SYSTEM)
1484 /* Become a session leader if we aren't one yet. */
1487 /* Move out of the way, so that we won't block unmounts */
1488 assert_se(chdir("/") == 0);
1490 /* Reset the console, but only if this is really init and we
1491 * are freshly booted */
1492 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {
1494 /* If we are init, we connect stdin/stdout/stderr to
1495 * /dev/null and make sure we don't have a controlling
1499 if (getpid() == 1 && !skip_setup)
1503 /* Open the logging devices, if possible and necessary */
1506 if (arg_show_status == _SHOW_STATUS_UNSET)
1507 arg_show_status = SHOW_STATUS_YES;
1509 /* Make sure we leave a core dump without panicing the
1511 if (getpid() == 1) {
1512 install_crash_handler();
1514 r = mount_cgroup_controllers(arg_join_controllers);
1519 if (arg_running_as == SYSTEMD_SYSTEM) {
1520 const char *virtualization = NULL;
1522 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1523 arg_action == ACTION_TEST ? "test " : "" );
1525 detect_virtualization(&virtualization);
1527 log_info("Detected virtualization '%s'.", virtualization);
1529 write_container_id();
1531 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1534 log_info("Running in initial RAM disk.");
1536 /* Let's check whether /etc is already populated. We
1537 * don't actually really check for that, but use
1538 * /etc/machine-id as flag file. This allows container
1539 * managers and installers to provision a couple of
1540 * files already. If the container manager wants to
1541 * provision the machine ID itself it should pass
1542 * $container_uuid to PID 1.*/
1544 empty_etc = access("/etc/machine-id", F_OK) < 0;
1546 log_info("Running with unpopulated /etc.");
1548 _cleanup_free_ char *t;
1550 t = uid_to_name(getuid());
1551 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1552 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1555 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1556 if (arg_show_status > 0 || plymouth_running())
1560 machine_id_setup(NULL);
1567 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1568 watchdog_set_timeout(&arg_runtime_watchdog);
1570 if (arg_timer_slack_nsec != NSEC_INFINITY)
1571 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1572 log_error("Failed to adjust timer slack: %m");
1574 if (arg_capability_bounding_set_drop) {
1575 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1577 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1580 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1582 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1587 if (arg_syscall_archs) {
1588 r = enforce_syscall_archs(arg_syscall_archs);
1593 if (arg_running_as == SYSTEMD_USER) {
1594 /* Become reaper of our children */
1595 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1596 log_warning("Failed to make us a subreaper: %m");
1597 if (errno == EINVAL)
1598 log_info("Perhaps the kernel version is too old (< 3.4?)");
1602 if (arg_running_as == SYSTEMD_SYSTEM) {
1603 bump_rlimit_nofile(&saved_rlimit_nofile);
1606 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1608 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1610 log_info("Populated /etc with preset unit settings.");
1614 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1616 log_error("Failed to allocate manager object: %s", strerror(-r));
1620 m->confirm_spawn = arg_confirm_spawn;
1621 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1622 m->default_std_output = arg_default_std_output;
1623 m->default_std_error = arg_default_std_error;
1624 m->default_restart_usec = arg_default_restart_usec;
1625 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1626 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1627 m->default_start_limit_interval = arg_default_start_limit_interval;
1628 m->default_start_limit_burst = arg_default_start_limit_burst;
1629 m->default_cpu_accounting = arg_default_cpu_accounting;
1630 m->default_blockio_accounting = arg_default_blockio_accounting;
1631 m->default_memory_accounting = arg_default_memory_accounting;
1632 m->runtime_watchdog = arg_runtime_watchdog;
1633 m->shutdown_watchdog = arg_shutdown_watchdog;
1635 m->userspace_timestamp = userspace_timestamp;
1636 m->kernel_timestamp = kernel_timestamp;
1637 m->initrd_timestamp = initrd_timestamp;
1638 m->security_start_timestamp = security_start_timestamp;
1639 m->security_finish_timestamp = security_finish_timestamp;
1641 manager_set_default_rlimits(m, arg_default_rlimit);
1642 manager_environment_add(m, NULL, arg_default_environment);
1643 manager_set_show_status(m, arg_show_status);
1644 manager_set_first_boot(m, empty_etc);
1646 /* Remember whether we should queue the default job */
1647 queue_default_job = !arg_serialization || arg_switched_root;
1649 before_startup = now(CLOCK_MONOTONIC);
1651 r = manager_startup(m, arg_serialization, fds);
1653 log_error("Failed to fully start up daemon: %s", strerror(-r));
1655 /* This will close all file descriptors that were opened, but
1656 * not claimed by any unit. */
1660 if (arg_serialization) {
1661 fclose(arg_serialization);
1662 arg_serialization = NULL;
1665 if (queue_default_job) {
1666 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1667 Unit *target = NULL;
1668 Job *default_unit_job;
1670 log_debug("Activating default unit: %s", arg_default_unit);
1672 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1674 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1675 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1676 log_error("Failed to load default target: %s", strerror(-target->load_error));
1677 else if (target->load_state == UNIT_MASKED)
1678 log_error("Default target masked.");
1680 if (!target || target->load_state != UNIT_LOADED) {
1681 log_info("Trying to load rescue target...");
1683 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1685 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1687 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1688 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1690 } else if (target->load_state == UNIT_MASKED) {
1691 log_error("Rescue target masked.");
1696 assert(target->load_state == UNIT_LOADED);
1698 if (arg_action == ACTION_TEST) {
1699 printf("-> By units:\n");
1700 manager_dump_units(m, stdout, "\t");
1703 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1705 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1707 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1709 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1713 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1717 m->default_unit_job_id = default_unit_job->id;
1719 after_startup = now(CLOCK_MONOTONIC);
1720 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1721 "Loaded units and determined initial transaction in %s.",
1722 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1724 if (arg_action == ACTION_TEST) {
1725 printf("-> By jobs:\n");
1726 manager_dump_jobs(m, stdout, "\t");
1727 retval = EXIT_SUCCESS;
1733 r = manager_loop(m);
1735 log_error("Failed to run mainloop: %s", strerror(-r));
1739 switch (m->exit_code) {
1742 retval = EXIT_SUCCESS;
1746 case MANAGER_RELOAD:
1747 log_info("Reloading.");
1748 r = manager_reload(m);
1750 log_error("Failed to reload: %s", strerror(-r));
1753 case MANAGER_REEXECUTE:
1755 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1759 log_notice("Reexecuting.");
1762 case MANAGER_SWITCH_ROOT:
1763 /* Steal the switch root parameters */
1764 switch_root_dir = m->switch_root;
1765 switch_root_init = m->switch_root_init;
1766 m->switch_root = m->switch_root_init = NULL;
1768 if (!switch_root_init)
1769 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1773 log_notice("Switching root.");
1776 case MANAGER_REBOOT:
1777 case MANAGER_POWEROFF:
1779 case MANAGER_KEXEC: {
1780 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1781 [MANAGER_REBOOT] = "reboot",
1782 [MANAGER_POWEROFF] = "poweroff",
1783 [MANAGER_HALT] = "halt",
1784 [MANAGER_KEXEC] = "kexec"
1787 assert_se(shutdown_verb = table[m->exit_code]);
1788 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1790 log_notice("Shutting down.");
1795 assert_not_reached("Unknown exit code.");
1802 m = manager_free(m);
1804 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1805 free(arg_default_rlimit[j]);
1806 arg_default_rlimit[j] = NULL;
1809 free(arg_default_unit);
1810 arg_default_unit = NULL;
1812 free_join_controllers();
1814 strv_free(arg_default_environment);
1815 arg_default_environment = NULL;
1817 set_free(arg_syscall_archs);
1818 arg_syscall_archs = NULL;
1820 mac_selinux_finish();
1824 unsigned i, args_size;
1826 /* Close and disarm the watchdog, so that the new
1827 * instance can reinitialize it, but doesn't get
1828 * rebooted while we do that */
1829 watchdog_close(true);
1831 /* Reset the RLIMIT_NOFILE to the kernel default, so
1832 * that the new systemd can pass the kernel default to
1833 * its child processes */
1834 if (saved_rlimit_nofile.rlim_cur > 0)
1835 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1837 if (switch_root_dir) {
1838 /* Kill all remaining processes from the
1839 * initrd, but don't wait for them, so that we
1840 * can handle the SIGCHLD for them after
1842 broadcast_signal(SIGTERM, false, true);
1844 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1845 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1847 log_error("Failed to switch root, trying to continue: %s", strerror(-r));
1850 args_size = MAX(6, argc+1);
1851 args = newa(const char*, args_size);
1853 if (!switch_root_init) {
1856 /* First try to spawn ourselves with the right
1857 * path, and with full serialization. We do
1858 * this only if the user didn't specify an
1859 * explicit init to spawn. */
1861 assert(arg_serialization);
1864 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1868 args[i++] = SYSTEMD_BINARY_PATH;
1869 if (switch_root_dir)
1870 args[i++] = "--switched-root";
1871 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1872 args[i++] = "--deserialize";
1876 /* do not pass along the environment we inherit from the kernel or initrd */
1877 if (switch_root_dir)
1880 assert(i <= args_size);
1881 execv(args[0], (char* const*) args);
1884 /* Try the fallback, if there is any, without any
1885 * serialization. We pass the original argv[] and
1886 * envp[]. (Well, modulo the ordering changes due to
1887 * getopt() in argv[], and some cleanups in envp[],
1888 * but let's hope that doesn't matter.) */
1890 if (arg_serialization) {
1891 fclose(arg_serialization);
1892 arg_serialization = NULL;
1900 /* Reopen the console */
1901 make_console_stdio();
1903 for (j = 1, i = 1; j < (unsigned) argc; j++)
1904 args[i++] = argv[j];
1906 assert(i <= args_size);
1908 /* Reenable any blocked signals, especially important
1909 * if we switch from initial ramdisk to init=... */
1910 reset_all_signal_handlers();
1911 reset_signal_mask();
1913 if (switch_root_init) {
1914 args[0] = switch_root_init;
1915 execv(args[0], (char* const*) args);
1916 log_warning("Failed to execute configured init, trying fallback: %m");
1919 args[0] = "/sbin/init";
1920 execv(args[0], (char* const*) args);
1922 if (errno == ENOENT) {
1923 log_warning("No /sbin/init, trying fallback");
1925 args[0] = "/bin/sh";
1927 execv(args[0], (char* const*) args);
1928 log_error("Failed to execute /bin/sh, giving up: %m");
1930 log_warning("Failed to execute /sbin/init, giving up: %m");
1933 if (arg_serialization) {
1934 fclose(arg_serialization);
1935 arg_serialization = NULL;
1943 #ifdef HAVE_VALGRIND_VALGRIND_H
1944 /* If we are PID 1 and running under valgrind, then let's exit
1945 * here explicitly. valgrind will only generate nice output on
1946 * exit(), not on exec(), hence let's do the former not the
1948 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1952 if (shutdown_verb) {
1953 char log_level[DECIMAL_STR_MAX(int) + 1];
1954 const char* command_line[9] = {
1955 SYSTEMD_SHUTDOWN_BINARY_PATH,
1957 "--log-level", log_level,
1961 _cleanup_strv_free_ char **env_block = NULL;
1963 assert(command_line[pos] == NULL);
1964 env_block = strv_copy(environ);
1966 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1968 switch (log_get_target()) {
1969 case LOG_TARGET_KMSG:
1970 case LOG_TARGET_JOURNAL_OR_KMSG:
1971 case LOG_TARGET_SYSLOG_OR_KMSG:
1972 command_line[pos++] = "kmsg";
1975 case LOG_TARGET_CONSOLE:
1977 command_line[pos++] = "console";
1981 if (log_get_show_color())
1982 command_line[pos++] = "--log-color";
1984 if (log_get_show_location())
1985 command_line[pos++] = "--log-location";
1987 assert(pos < ELEMENTSOF(command_line));
1989 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1992 /* If we reboot let's set the shutdown
1993 * watchdog and tell the shutdown binary to
1994 * repeatedly ping it */
1995 watchdog_set_timeout(&arg_shutdown_watchdog);
1996 watchdog_close(false);
1998 /* Tell the binary how often to ping, ignore failure */
1999 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2000 strv_push(&env_block, e);
2002 watchdog_close(true);
2004 /* Avoid the creation of new processes forked by the
2005 * kernel; at this point, we will not listen to the
2007 if (detect_container(NULL) <= 0)
2008 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2010 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2011 log_error("Failed to execute shutdown binary, %s: %m",
2012 getpid() == 1 ? "freezing" : "quitting");