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_emergency("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_emergency_errno(errno, "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_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
179 else if (status.si_code != CLD_DUMPED)
180 log_emergency("Caught <%s>, core dump failed.", signal_to_string(sig));
182 log_emergency("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_emergency_errno(errno, "Failed to fork off crash shell: %m");
206 make_console_stdio();
207 execl("/bin/sh", "/bin/sh", NULL);
209 log_emergency_errno(errno, "execl() failed: %m");
213 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
216 log_emergency("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 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
237 /* We don't want to force text mode. plymouth may be showing
238 * pictures already from initrd. */
239 r = reset_terminal_fd(tty_fd, false);
241 return log_error_errno(r, "Failed to reset /dev/console: %m");
246 static int set_default_unit(const char *u) {
255 free(arg_default_unit);
256 arg_default_unit = c;
261 static int parse_proc_cmdline_item(const char *key, const char *value) {
263 static const char * const rlmap[] = {
264 "emergency", SPECIAL_EMERGENCY_TARGET,
265 "-b", SPECIAL_EMERGENCY_TARGET,
266 "rescue", SPECIAL_RESCUE_TARGET,
267 "single", SPECIAL_RESCUE_TARGET,
268 "-s", SPECIAL_RESCUE_TARGET,
269 "s", SPECIAL_RESCUE_TARGET,
270 "S", SPECIAL_RESCUE_TARGET,
271 "1", SPECIAL_RESCUE_TARGET,
272 "2", SPECIAL_RUNLEVEL2_TARGET,
273 "3", SPECIAL_RUNLEVEL3_TARGET,
274 "4", SPECIAL_RUNLEVEL4_TARGET,
275 "5", SPECIAL_RUNLEVEL5_TARGET,
281 if (streq(key, "systemd.unit") && value) {
284 return set_default_unit(value);
286 } else if (streq(key, "rd.systemd.unit") && value) {
289 return set_default_unit(value);
291 } else if (streq(key, "systemd.dump_core") && value) {
293 r = parse_boolean(value);
295 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
299 } else if (streq(key, "systemd.crash_shell") && value) {
301 r = parse_boolean(value);
303 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
307 } else if (streq(key, "systemd.crash_chvt") && value) {
309 if (safe_atoi(value, &r) < 0)
310 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
314 } else if (streq(key, "systemd.confirm_spawn") && value) {
316 r = parse_boolean(value);
318 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
320 arg_confirm_spawn = r;
322 } else if (streq(key, "systemd.show_status") && value) {
324 r = parse_show_status(value, &arg_show_status);
326 log_warning("Failed to parse show status switch %s. Ignoring.", value);
328 } else if (streq(key, "systemd.default_standard_output") && value) {
330 r = exec_output_from_string(value);
332 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
334 arg_default_std_output = r;
336 } else if (streq(key, "systemd.default_standard_error") && value) {
338 r = exec_output_from_string(value);
340 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
342 arg_default_std_error = r;
344 } else if (streq(key, "systemd.setenv") && value) {
346 if (env_assignment_is_valid(value)) {
349 env = strv_env_set(arg_default_environment, value);
351 arg_default_environment = env;
353 log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value);
355 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
357 } else if (streq(key, "quiet") && !value) {
359 log_set_max_level(LOG_NOTICE);
361 if (arg_show_status == _SHOW_STATUS_UNSET)
362 arg_show_status = SHOW_STATUS_AUTO;
364 } else if (streq(key, "debug") && !value) {
366 /* Note that log_parse_environment() handles 'debug'
367 * too, and sets the log level to LOG_DEBUG. */
369 if (detect_container(NULL) > 0)
370 log_set_target(LOG_TARGET_CONSOLE);
372 } else if (!in_initrd() && !value) {
375 /* SysV compatibility */
376 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
377 if (streq(key, rlmap[i]))
378 return set_default_unit(rlmap[i+1]);
384 #define DEFINE_SETTER(name, func, descr) \
385 static int name(const char *unit, \
386 const char *filename, \
388 const char *section, \
389 unsigned section_line, \
390 const char *lvalue, \
392 const char *rvalue, \
404 log_syntax(unit, LOG_ERR, filename, line, -r, \
405 "Invalid " descr "'%s': %s", \
406 rvalue, strerror(-r)); \
411 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
412 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
413 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
414 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
416 static int config_parse_cpu_affinity2(
418 const char *filename,
421 unsigned section_line,
428 const char *word, *state;
437 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
442 if (!(t = strndup(word, l)))
445 r = safe_atou(t, &cpu);
449 if (!(c = cpu_set_malloc(&ncpus)))
452 if (r < 0 || cpu >= ncpus) {
453 log_syntax(unit, LOG_ERR, filename, line, -r,
454 "Failed to parse CPU affinity '%s'", rvalue);
459 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
462 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
463 "Trailing garbage, ignoring.");
466 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
467 log_unit_warning(unit, "Failed to set CPU affinity: %m");
475 static int config_parse_show_status(
477 const char *filename,
480 unsigned section_line,
488 ShowStatus *b = data;
495 k = parse_show_status(rvalue, b);
497 log_syntax(unit, LOG_ERR, filename, line, -k,
498 "Failed to parse show status setting, ignoring: %s", rvalue);
505 static void strv_free_free(char ***l) {
517 static void free_join_controllers(void) {
518 strv_free_free(arg_join_controllers);
519 arg_join_controllers = NULL;
522 static int config_parse_join_controllers(const char *unit,
523 const char *filename,
526 unsigned section_line,
534 const char *word, *state;
541 free_join_controllers();
543 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
546 s = strndup(word, length);
550 l = strv_split(s, ",");
555 if (strv_length(l) <= 1) {
560 if (!arg_join_controllers) {
561 arg_join_controllers = new(char**, 2);
562 if (!arg_join_controllers) {
567 arg_join_controllers[0] = l;
568 arg_join_controllers[1] = NULL;
575 t = new0(char**, n+2);
583 for (a = arg_join_controllers; *a; a++) {
585 if (strv_overlap(*a, l)) {
586 if (strv_extend_strv(&l, *a) < 0) {
606 t[n++] = strv_uniq(l);
608 strv_free_free(arg_join_controllers);
609 arg_join_controllers = t;
613 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
614 "Trailing garbage, ignoring.");
619 static int parse_config_file(void) {
621 const ConfigTableItem items[] = {
622 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
623 { "Manager", "LogTarget", config_parse_target, 0, NULL },
624 { "Manager", "LogColor", config_parse_color, 0, NULL },
625 { "Manager", "LogLocation", config_parse_location, 0, NULL },
626 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
627 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
628 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
629 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
630 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
631 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
632 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
633 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
634 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
636 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
638 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
639 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
640 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
641 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
642 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
643 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
644 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
645 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
646 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
647 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
648 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
649 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
650 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
651 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
652 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
653 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
654 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
655 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
656 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
657 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
658 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
659 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
660 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
661 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
662 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
663 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
664 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
665 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
666 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
670 const char *fn, *conf_dirs_nulstr;
672 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
673 conf_dirs_nulstr = arg_running_as == SYSTEMD_SYSTEM ? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
674 config_parse_many(fn, conf_dirs_nulstr, "Manager\0",
675 config_item_table_lookup, items, false, NULL);
680 static int parse_argv(int argc, char *argv[]) {
683 ARG_LOG_LEVEL = 0x100,
693 ARG_DUMP_CONFIGURATION_ITEMS,
700 ARG_DEFAULT_STD_OUTPUT,
701 ARG_DEFAULT_STD_ERROR
704 static const struct option options[] = {
705 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
706 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
707 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
708 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
709 { "unit", required_argument, NULL, ARG_UNIT },
710 { "system", no_argument, NULL, ARG_SYSTEM },
711 { "user", no_argument, NULL, ARG_USER },
712 { "test", no_argument, NULL, ARG_TEST },
713 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
714 { "help", no_argument, NULL, 'h' },
715 { "version", no_argument, NULL, ARG_VERSION },
716 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
717 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
718 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
719 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
720 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
721 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
722 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
723 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
724 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
736 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
741 r = log_set_max_level_from_string(optarg);
743 log_error("Failed to parse log level %s.", optarg);
750 r = log_set_target_from_string(optarg);
752 log_error("Failed to parse log target %s.", optarg);
761 r = log_show_color_from_string(optarg);
763 log_error("Failed to parse log color setting %s.", optarg);
767 log_show_color(true);
771 case ARG_LOG_LOCATION:
773 r = log_show_location_from_string(optarg);
775 log_error("Failed to parse log location setting %s.", optarg);
779 log_show_location(true);
783 case ARG_DEFAULT_STD_OUTPUT:
784 r = exec_output_from_string(optarg);
786 log_error("Failed to parse default standard output setting %s.", optarg);
789 arg_default_std_output = r;
792 case ARG_DEFAULT_STD_ERROR:
793 r = exec_output_from_string(optarg);
795 log_error("Failed to parse default standard error output setting %s.", optarg);
798 arg_default_std_error = r;
803 r = set_default_unit(optarg);
805 return log_error_errno(r, "Failed to set default unit %s: %m", optarg);
810 arg_running_as = SYSTEMD_SYSTEM;
814 arg_running_as = SYSTEMD_USER;
818 arg_action = ACTION_TEST;
819 if (arg_no_pager < 0)
828 arg_action = ACTION_VERSION;
831 case ARG_DUMP_CONFIGURATION_ITEMS:
832 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
836 r = optarg ? parse_boolean(optarg) : 1;
838 log_error("Failed to parse dump core boolean %s.", optarg);
844 case ARG_CRASH_SHELL:
845 r = optarg ? parse_boolean(optarg) : 1;
847 log_error("Failed to parse crash shell boolean %s.", optarg);
853 case ARG_CONFIRM_SPAWN:
854 r = optarg ? parse_boolean(optarg) : 1;
856 log_error("Failed to parse confirm spawn boolean %s.", optarg);
859 arg_confirm_spawn = r;
862 case ARG_SHOW_STATUS:
864 r = parse_show_status(optarg, &arg_show_status);
866 log_error("Failed to parse show status boolean %s.", optarg);
870 arg_show_status = SHOW_STATUS_YES;
873 case ARG_DESERIALIZE: {
877 r = safe_atoi(optarg, &fd);
878 if (r < 0 || fd < 0) {
879 log_error("Failed to parse deserialize option %s.", optarg);
880 return r < 0 ? r : -EINVAL;
883 fd_cloexec(fd, true);
887 return log_error_errno(errno, "Failed to open serialization fd: %m");
889 if (arg_serialization)
890 fclose(arg_serialization);
892 arg_serialization = f;
897 case ARG_SWITCHED_ROOT:
898 arg_switched_root = true;
902 arg_action = ACTION_HELP;
903 if (arg_no_pager < 0)
908 log_set_max_level(LOG_DEBUG);
914 /* Just to eat away the sysvinit kernel
915 * cmdline args without getopt() error
916 * messages that we'll parse in
917 * parse_proc_cmdline_word() or ignore. */
926 assert_not_reached("Unhandled option code.");
929 if (optind < argc && getpid() != 1) {
930 /* Hmm, when we aren't run as init system
931 * let's complain about excess arguments */
933 log_error("Excess arguments.");
940 static int help(void) {
942 printf("%s [OPTIONS...]\n\n"
943 "Starts up and maintains the system or user services.\n\n"
944 " -h --help Show this help\n"
945 " --test Determine startup sequence, dump it and exit\n"
946 " --no-pager Do not pipe output into a pager\n"
947 " --dump-configuration-items Dump understood unit configuration items\n"
948 " --unit=UNIT Set default unit\n"
949 " --system Run a system instance, even if PID != 1\n"
950 " --user Run a user instance\n"
951 " --dump-core[=0|1] Dump core on crash\n"
952 " --crash-shell[=0|1] Run shell on crash\n"
953 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
954 " --show-status[=0|1] Show status updates on the console during bootup\n"
955 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
956 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
957 " --log-color[=0|1] Highlight important log messages\n"
958 " --log-location[=0|1] Include code location in log messages\n"
959 " --default-standard-output= Set default standard output for services\n"
960 " --default-standard-error= Set default standard error output for services\n",
961 program_invocation_short_name);
966 static int version(void) {
967 puts(PACKAGE_STRING);
968 puts(SYSTEMD_FEATURES);
973 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
982 r = manager_open_serialization(m, &f);
984 log_error_errno(r, "Failed to create serialization file: %m");
988 /* Make sure nothing is really destructed when we shut down */
990 bus_manager_send_reloading(m, true);
995 log_error_errno(r, "Failed to allocate fd set: %m");
999 r = manager_serialize(m, f, fds, switching_root);
1001 log_error_errno(r, "Failed to serialize state: %m");
1005 if (fseeko(f, 0, SEEK_SET) < 0) {
1006 log_error_errno(errno, "Failed to rewind serialization fd: %m");
1010 r = fd_cloexec(fileno(f), false);
1012 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
1016 r = fdset_cloexec(fds, false);
1018 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
1036 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1040 assert(saved_rlimit);
1042 /* Save the original RLIMIT_NOFILE so that we can reset it
1043 * later when transitioning from the initrd to the main
1044 * systemd or suchlike. */
1045 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
1046 return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %m");
1048 /* Make sure forked processes get the default kernel setting */
1049 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1052 rl = newdup(struct rlimit, saved_rlimit, 1);
1056 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1059 /* Bump up the resource limit for ourselves substantially */
1060 nl.rlim_cur = nl.rlim_max = 64*1024;
1061 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1063 return log_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");
1068 static void test_mtab(void) {
1070 static const char ok[] =
1071 "/proc/self/mounts\0"
1073 "../proc/self/mounts\0"
1076 _cleanup_free_ char *p = NULL;
1079 /* Check that /etc/mtab is a symlink to the right place or
1080 * non-existing. But certainly not a file, or a symlink to
1081 * some weird place... */
1083 r = readlink_malloc("/etc/mtab", &p);
1086 if (r >= 0 && nulstr_contains(ok, p))
1089 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1090 "This is not supported anymore. "
1091 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1094 static void test_usr(void) {
1096 /* Check that /usr is not a separate fs */
1098 if (dir_is_empty("/usr") <= 0)
1101 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1102 "Some things will probably break (sometimes even silently) in mysterious ways. "
1103 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1106 static int initialize_join_controllers(void) {
1107 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1108 * + "net_prio". We'd like to add "cpuset" to the mix, but
1109 * "cpuset" does't really work for groups with no initialized
1112 arg_join_controllers = new(char**, 3);
1113 if (!arg_join_controllers)
1116 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1117 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1118 arg_join_controllers[2] = NULL;
1120 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1121 free_join_controllers();
1128 static int enforce_syscall_archs(Set *archs) {
1130 scmp_filter_ctx *seccomp;
1135 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1139 SET_FOREACH(id, arg_syscall_archs, i) {
1140 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1144 log_error_errno(r, "Failed to add architecture to seccomp: %m");
1149 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1151 log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m");
1155 r = seccomp_load(seccomp);
1157 log_error_errno(r, "Failed to add install architecture seccomp: %m");
1160 seccomp_release(seccomp);
1167 static int status_welcome(void) {
1168 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1171 r = parse_env_file("/etc/os-release", NEWLINE,
1172 "PRETTY_NAME", &pretty_name,
1173 "ANSI_COLOR", &ansi_color,
1176 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1177 "PRETTY_NAME", &pretty_name,
1178 "ANSI_COLOR", &ansi_color,
1182 if (r < 0 && r != -ENOENT)
1183 log_warning_errno(r, "Failed to read os-release file: %m");
1185 return status_printf(NULL, false, false,
1186 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1187 isempty(ansi_color) ? "1" : ansi_color,
1188 isempty(pretty_name) ? "Linux" : pretty_name);
1191 static int write_container_id(void) {
1194 c = getenv("container");
1198 return write_string_file("/run/systemd/container", c);
1201 int main(int argc, char *argv[]) {
1203 int r, retval = EXIT_FAILURE;
1204 usec_t before_startup, after_startup;
1205 char timespan[FORMAT_TIMESPAN_MAX];
1207 bool reexecute = false;
1208 const char *shutdown_verb = NULL;
1209 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1210 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1211 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1212 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1213 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1214 static char systemd[] = "systemd";
1215 bool skip_setup = false;
1217 bool loaded_policy = false;
1218 bool arm_reboot_watchdog = false;
1219 bool queue_default_job = false;
1220 bool empty_etc = false;
1221 char *switch_root_dir = NULL, *switch_root_init = NULL;
1222 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1223 const char *error_message = NULL;
1225 #ifdef HAVE_SYSV_COMPAT
1226 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1227 /* This is compatibility support for SysV, where
1228 * calling init as a user is identical to telinit. */
1231 execv(SYSTEMCTL_BINARY_PATH, argv);
1232 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1237 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1238 dual_timestamp_get(&userspace_timestamp);
1240 /* Determine if this is a reexecution or normal bootup. We do
1241 * the full command line parsing much later, so let's just
1242 * have a quick peek here. */
1243 if (strv_find(argv+1, "--deserialize"))
1246 /* If we have switched root, do all the special setup
1248 if (strv_find(argv+1, "--switched-root"))
1251 /* If we get started via the /sbin/init symlink then we are
1252 called 'init'. After a subsequent reexecution we are then
1253 called 'systemd'. That is confusing, hence let's call us
1254 systemd right-away. */
1255 program_invocation_short_name = systemd;
1256 prctl(PR_SET_NAME, systemd);
1261 log_show_color(isatty(STDERR_FILENO) > 0);
1262 log_set_upgrade_syslog_to_journal(true);
1264 /* Disable the umask logic */
1268 if (getpid() == 1 && detect_container(NULL) <= 0) {
1270 /* Running outside of a container as PID 1 */
1271 arg_running_as = SYSTEMD_SYSTEM;
1273 log_set_target(LOG_TARGET_KMSG);
1277 initrd_timestamp = userspace_timestamp;
1280 mount_setup_early();
1281 dual_timestamp_get(&security_start_timestamp);
1282 if (mac_selinux_setup(&loaded_policy) < 0) {
1283 error_message = "Failed to load SELinux policy";
1285 } else if (ima_setup() < 0) {
1286 error_message = "Failed to load IMA policy";
1288 } else if (mac_smack_setup(&loaded_policy) < 0) {
1289 error_message = "Failed to load SMACK policy";
1292 dual_timestamp_get(&security_finish_timestamp);
1295 if (mac_selinux_init(NULL) < 0) {
1296 error_message = "Failed to initialize SELinux policy";
1301 if (clock_is_localtime() > 0) {
1305 * The very first call of settimeofday() also does a time warp in the kernel.
1307 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1308 * external tools to take care of maintaining the RTC and do all adjustments.
1309 * This matches the behavior of Windows, which leaves the RTC alone if the
1310 * registry tells that the RTC runs in UTC.
1312 r = clock_set_timezone(&min);
1314 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1316 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1317 } else if (!in_initrd()) {
1319 * Do a dummy very first call to seal the kernel's time warp magic.
1321 * Do not call this this from inside the initrd. The initrd might not
1322 * carry /etc/adjtime with LOCAL, but the real system could be set up
1323 * that way. In such case, we need to delay the time-warp or the sealing
1324 * until we reach the real system.
1326 * Do no set the kernel's timezone. The concept of local time cannot
1327 * be supported reliably, the time will jump or be incorrect at every daylight
1328 * saving time change. All kernel local time concepts will be treated
1331 clock_reset_timewarp();
1335 /* Set the default for later on, but don't actually
1336 * open the logs like this for now. Note that if we
1337 * are transitioning from the initrd there might still
1338 * be journal fd open, and we shouldn't attempt
1339 * opening that before we parsed /proc/cmdline which
1340 * might redirect output elsewhere. */
1341 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1343 } else if (getpid() == 1) {
1344 /* Running inside a container, as PID 1 */
1345 arg_running_as = SYSTEMD_SYSTEM;
1346 log_set_target(LOG_TARGET_CONSOLE);
1347 log_close_console(); /* force reopen of /dev/console */
1350 /* For the later on, see above... */
1351 log_set_target(LOG_TARGET_JOURNAL);
1353 /* clear the kernel timestamp,
1354 * because we are in a container */
1355 kernel_timestamp.monotonic = 0ULL;
1356 kernel_timestamp.realtime = 0ULL;
1359 /* Running as user instance */
1360 arg_running_as = SYSTEMD_USER;
1361 log_set_target(LOG_TARGET_AUTO);
1364 /* clear the kernel timestamp,
1365 * because we are not PID 1 */
1366 kernel_timestamp.monotonic = 0ULL;
1367 kernel_timestamp.realtime = 0ULL;
1370 /* Initialize default unit */
1371 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1373 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
1374 error_message = "Failed to set default unit";
1378 r = initialize_join_controllers();
1380 error_message = "Failed to initalize cgroup controllers";
1384 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1385 * /proc/$PID/fd is available. */
1386 if (getpid() == 1) {
1388 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1392 r = mount_setup(loaded_policy);
1394 error_message = "Failed to mount API filesystems";
1399 /* Reset all signal handlers. */
1400 assert_se(reset_all_signal_handlers() == 0);
1402 ignore_signals(SIGNALS_IGNORE, -1);
1404 if (parse_config_file() < 0) {
1405 error_message = "Failed to parse config file";
1409 if (arg_running_as == SYSTEMD_SYSTEM) {
1410 r = parse_proc_cmdline(parse_proc_cmdline_item);
1412 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1415 /* Note that this also parses bits from the kernel command
1416 * line, including "debug". */
1417 log_parse_environment();
1419 if (parse_argv(argc, argv) < 0) {
1420 error_message = "Failed to parse commandline arguments";
1424 if (arg_action == ACTION_TEST &&
1426 log_error("Don't run test mode as root.");
1430 if (arg_running_as == SYSTEMD_USER &&
1431 arg_action == ACTION_RUN &&
1433 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1437 if (arg_running_as == SYSTEMD_SYSTEM &&
1438 arg_action == ACTION_RUN &&
1439 running_in_chroot() > 0) {
1440 log_error("Cannot be run in a chroot() environment.");
1444 if (arg_action == ACTION_TEST)
1447 pager_open_if_enabled();
1449 if (arg_action == ACTION_HELP) {
1452 } else if (arg_action == ACTION_VERSION) {
1455 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1456 unit_dump_config_items(stdout);
1457 retval = EXIT_SUCCESS;
1459 } else if (arg_action == ACTION_DONE) {
1460 retval = EXIT_SUCCESS;
1464 if (arg_running_as == SYSTEMD_USER &&
1465 !getenv("XDG_RUNTIME_DIR")) {
1466 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1470 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1472 /* Close logging fds, in order not to confuse fdset below */
1475 /* Remember open file descriptors for later deserialization */
1476 r = fdset_new_fill(&fds);
1478 log_emergency_errno(r, "Failed to allocate fd set: %m");
1479 error_message = "Failed to allocate fd set";
1482 fdset_cloexec(fds, true);
1484 if (arg_serialization)
1485 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1487 if (arg_running_as == SYSTEMD_SYSTEM)
1488 /* Become a session leader if we aren't one yet. */
1491 /* Move out of the way, so that we won't block unmounts */
1492 assert_se(chdir("/") == 0);
1494 /* Reset the console, but only if this is really init and we
1495 * are freshly booted */
1496 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {
1498 /* If we are init, we connect stdin/stdout/stderr to
1499 * /dev/null and make sure we don't have a controlling
1503 if (getpid() == 1 && !skip_setup)
1507 /* Open the logging devices, if possible and necessary */
1510 if (arg_show_status == _SHOW_STATUS_UNSET)
1511 arg_show_status = SHOW_STATUS_YES;
1513 /* Make sure we leave a core dump without panicing the
1515 if (getpid() == 1) {
1516 install_crash_handler();
1518 r = mount_cgroup_controllers(arg_join_controllers);
1523 if (arg_running_as == SYSTEMD_SYSTEM) {
1524 const char *virtualization = NULL;
1526 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1527 arg_action == ACTION_TEST ? "test " : "" );
1529 detect_virtualization(&virtualization);
1531 log_info("Detected virtualization '%s'.", virtualization);
1533 write_container_id();
1535 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1538 log_info("Running in initial RAM disk.");
1540 /* Let's check whether /etc is already populated. We
1541 * don't actually really check for that, but use
1542 * /etc/machine-id as flag file. This allows container
1543 * managers and installers to provision a couple of
1544 * files already. If the container manager wants to
1545 * provision the machine ID itself it should pass
1546 * $container_uuid to PID 1.*/
1548 empty_etc = access("/etc/machine-id", F_OK) < 0;
1550 log_info("Running with unpopulated /etc.");
1552 _cleanup_free_ char *t;
1554 t = uid_to_name(getuid());
1555 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1556 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1559 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1560 if (arg_show_status > 0 || plymouth_running())
1564 machine_id_setup(NULL);
1571 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1572 watchdog_set_timeout(&arg_runtime_watchdog);
1574 if (arg_timer_slack_nsec != NSEC_INFINITY)
1575 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1576 log_error_errno(errno, "Failed to adjust timer slack: %m");
1578 if (arg_capability_bounding_set_drop) {
1579 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1581 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1582 error_message = "Failed to drop capability bounding set of usermode helpers";
1585 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1587 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1588 error_message = "Failed to drop capability bounding set";
1593 if (arg_syscall_archs) {
1594 r = enforce_syscall_archs(arg_syscall_archs);
1596 error_message = "Failed to set syscall architectures";
1601 if (arg_running_as == SYSTEMD_USER) {
1602 /* Become reaper of our children */
1603 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1604 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1605 if (errno == EINVAL)
1606 log_info("Perhaps the kernel version is too old (< 3.4?)");
1610 if (arg_running_as == SYSTEMD_SYSTEM) {
1611 bump_rlimit_nofile(&saved_rlimit_nofile);
1614 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1616 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
1618 log_info("Populated /etc with preset unit settings.");
1622 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1624 log_emergency_errno(r, "Failed to allocate manager object: %m");
1625 error_message = "Failed to allocate manager object";
1629 m->confirm_spawn = arg_confirm_spawn;
1630 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1631 m->default_std_output = arg_default_std_output;
1632 m->default_std_error = arg_default_std_error;
1633 m->default_restart_usec = arg_default_restart_usec;
1634 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1635 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1636 m->default_start_limit_interval = arg_default_start_limit_interval;
1637 m->default_start_limit_burst = arg_default_start_limit_burst;
1638 m->default_cpu_accounting = arg_default_cpu_accounting;
1639 m->default_blockio_accounting = arg_default_blockio_accounting;
1640 m->default_memory_accounting = arg_default_memory_accounting;
1641 m->runtime_watchdog = arg_runtime_watchdog;
1642 m->shutdown_watchdog = arg_shutdown_watchdog;
1644 m->userspace_timestamp = userspace_timestamp;
1645 m->kernel_timestamp = kernel_timestamp;
1646 m->initrd_timestamp = initrd_timestamp;
1647 m->security_start_timestamp = security_start_timestamp;
1648 m->security_finish_timestamp = security_finish_timestamp;
1650 manager_set_default_rlimits(m, arg_default_rlimit);
1651 manager_environment_add(m, NULL, arg_default_environment);
1652 manager_set_show_status(m, arg_show_status);
1653 manager_set_first_boot(m, empty_etc);
1655 /* Remember whether we should queue the default job */
1656 queue_default_job = !arg_serialization || arg_switched_root;
1658 before_startup = now(CLOCK_MONOTONIC);
1660 r = manager_startup(m, arg_serialization, fds);
1662 log_error_errno(r, "Failed to fully start up daemon: %m");
1664 /* This will close all file descriptors that were opened, but
1665 * not claimed by any unit. */
1669 if (arg_serialization) {
1670 fclose(arg_serialization);
1671 arg_serialization = NULL;
1674 if (queue_default_job) {
1675 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1676 Unit *target = NULL;
1677 Job *default_unit_job;
1679 log_debug("Activating default unit: %s", arg_default_unit);
1681 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1683 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1684 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1685 log_error_errno(target->load_error, "Failed to load default target: %m");
1686 else if (target->load_state == UNIT_MASKED)
1687 log_error("Default target masked.");
1689 if (!target || target->load_state != UNIT_LOADED) {
1690 log_info("Trying to load rescue target...");
1692 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1694 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
1695 error_message = "Failed to load rescue target";
1697 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1698 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
1699 error_message = "Failed to load rescue target";
1701 } else if (target->load_state == UNIT_MASKED) {
1702 log_emergency("Rescue target masked.");
1703 error_message = "Rescue target masked";
1708 assert(target->load_state == UNIT_LOADED);
1710 if (arg_action == ACTION_TEST) {
1711 printf("-> By units:\n");
1712 manager_dump_units(m, stdout, "\t");
1715 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1717 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1719 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1721 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
1722 error_message = "Failed to start default target";
1726 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
1727 error_message = "Failed to isolate default target";
1731 m->default_unit_job_id = default_unit_job->id;
1733 after_startup = now(CLOCK_MONOTONIC);
1734 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1735 "Loaded units and determined initial transaction in %s.",
1736 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1738 if (arg_action == ACTION_TEST) {
1739 printf("-> By jobs:\n");
1740 manager_dump_jobs(m, stdout, "\t");
1741 retval = EXIT_SUCCESS;
1747 r = manager_loop(m);
1749 log_emergency_errno(r, "Failed to run main loop: %m");
1750 error_message = "Failed to run main loop";
1754 switch (m->exit_code) {
1757 retval = EXIT_SUCCESS;
1761 case MANAGER_RELOAD:
1762 log_info("Reloading.");
1763 r = manager_reload(m);
1765 log_error_errno(r, "Failed to reload: %m");
1768 case MANAGER_REEXECUTE:
1770 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
1771 error_message = "Failed to prepare for reexection";
1776 log_notice("Reexecuting.");
1779 case MANAGER_SWITCH_ROOT:
1780 /* Steal the switch root parameters */
1781 switch_root_dir = m->switch_root;
1782 switch_root_init = m->switch_root_init;
1783 m->switch_root = m->switch_root_init = NULL;
1785 if (!switch_root_init)
1786 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
1787 error_message = "Failed to prepare for reexection";
1792 log_notice("Switching root.");
1795 case MANAGER_REBOOT:
1796 case MANAGER_POWEROFF:
1798 case MANAGER_KEXEC: {
1799 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1800 [MANAGER_REBOOT] = "reboot",
1801 [MANAGER_POWEROFF] = "poweroff",
1802 [MANAGER_HALT] = "halt",
1803 [MANAGER_KEXEC] = "kexec"
1806 assert_se(shutdown_verb = table[m->exit_code]);
1807 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1809 log_notice("Shutting down.");
1814 assert_not_reached("Unknown exit code.");
1821 m = manager_free(m);
1823 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1824 free(arg_default_rlimit[j]);
1825 arg_default_rlimit[j] = NULL;
1828 free(arg_default_unit);
1829 arg_default_unit = NULL;
1831 free_join_controllers();
1833 strv_free(arg_default_environment);
1834 arg_default_environment = NULL;
1836 set_free(arg_syscall_archs);
1837 arg_syscall_archs = NULL;
1839 mac_selinux_finish();
1843 unsigned i, args_size;
1845 /* Close and disarm the watchdog, so that the new
1846 * instance can reinitialize it, but doesn't get
1847 * rebooted while we do that */
1848 watchdog_close(true);
1850 /* Reset the RLIMIT_NOFILE to the kernel default, so
1851 * that the new systemd can pass the kernel default to
1852 * its child processes */
1853 if (saved_rlimit_nofile.rlim_cur > 0)
1854 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1856 if (switch_root_dir) {
1857 /* Kill all remaining processes from the
1858 * initrd, but don't wait for them, so that we
1859 * can handle the SIGCHLD for them after
1861 broadcast_signal(SIGTERM, false, true);
1863 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1864 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1866 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1869 args_size = MAX(6, argc+1);
1870 args = newa(const char*, args_size);
1872 if (!switch_root_init) {
1875 /* First try to spawn ourselves with the right
1876 * path, and with full serialization. We do
1877 * this only if the user didn't specify an
1878 * explicit init to spawn. */
1880 assert(arg_serialization);
1883 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1887 args[i++] = SYSTEMD_BINARY_PATH;
1888 if (switch_root_dir)
1889 args[i++] = "--switched-root";
1890 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1891 args[i++] = "--deserialize";
1895 /* do not pass along the environment we inherit from the kernel or initrd */
1896 if (switch_root_dir)
1899 assert(i <= args_size);
1900 execv(args[0], (char* const*) args);
1903 /* Try the fallback, if there is any, without any
1904 * serialization. We pass the original argv[] and
1905 * envp[]. (Well, modulo the ordering changes due to
1906 * getopt() in argv[], and some cleanups in envp[],
1907 * but let's hope that doesn't matter.) */
1909 if (arg_serialization) {
1910 fclose(arg_serialization);
1911 arg_serialization = NULL;
1919 /* Reopen the console */
1920 make_console_stdio();
1922 for (j = 1, i = 1; j < (unsigned) argc; j++)
1923 args[i++] = argv[j];
1925 assert(i <= args_size);
1927 /* Reenable any blocked signals, especially important
1928 * if we switch from initial ramdisk to init=... */
1929 reset_all_signal_handlers();
1930 reset_signal_mask();
1932 if (switch_root_init) {
1933 args[0] = switch_root_init;
1934 execv(args[0], (char* const*) args);
1935 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1938 args[0] = "/sbin/init";
1939 execv(args[0], (char* const*) args);
1941 if (errno == ENOENT) {
1942 log_warning("No /sbin/init, trying fallback");
1944 args[0] = "/bin/sh";
1946 execv(args[0], (char* const*) args);
1947 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1949 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
1952 if (arg_serialization) {
1953 fclose(arg_serialization);
1954 arg_serialization = NULL;
1962 #ifdef HAVE_VALGRIND_VALGRIND_H
1963 /* If we are PID 1 and running under valgrind, then let's exit
1964 * here explicitly. valgrind will only generate nice output on
1965 * exit(), not on exec(), hence let's do the former not the
1967 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1971 if (shutdown_verb) {
1972 char log_level[DECIMAL_STR_MAX(int) + 1];
1973 const char* command_line[9] = {
1974 SYSTEMD_SHUTDOWN_BINARY_PATH,
1976 "--log-level", log_level,
1980 _cleanup_strv_free_ char **env_block = NULL;
1982 assert(command_line[pos] == NULL);
1983 env_block = strv_copy(environ);
1985 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
1987 switch (log_get_target()) {
1988 case LOG_TARGET_KMSG:
1989 case LOG_TARGET_JOURNAL_OR_KMSG:
1990 case LOG_TARGET_SYSLOG_OR_KMSG:
1991 command_line[pos++] = "kmsg";
1994 case LOG_TARGET_CONSOLE:
1996 command_line[pos++] = "console";
2000 if (log_get_show_color())
2001 command_line[pos++] = "--log-color";
2003 if (log_get_show_location())
2004 command_line[pos++] = "--log-location";
2006 assert(pos < ELEMENTSOF(command_line));
2008 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2011 /* If we reboot let's set the shutdown
2012 * watchdog and tell the shutdown binary to
2013 * repeatedly ping it */
2014 watchdog_set_timeout(&arg_shutdown_watchdog);
2015 watchdog_close(false);
2017 /* Tell the binary how often to ping, ignore failure */
2018 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2019 strv_push(&env_block, e);
2021 watchdog_close(true);
2023 /* Avoid the creation of new processes forked by the
2024 * kernel; at this point, we will not listen to the
2026 if (detect_container(NULL) <= 0)
2027 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2029 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2030 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
2031 getpid() == 1 ? "freezing" : "quitting");
2034 if (getpid() == 1) {
2036 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2037 ANSI_HIGHLIGHT_RED_ON "!!!!!!" ANSI_HIGHLIGHT_OFF,
2038 "%s, freezing.", error_message);