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"
79 #include "kmod-setup.h"
87 ACTION_DUMP_CONFIGURATION_ITEMS,
89 } arg_action = ACTION_RUN;
90 static char *arg_default_unit = NULL;
91 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
92 static bool arg_dump_core = true;
93 static bool arg_crash_shell = false;
94 static int arg_crash_chvt = -1;
95 static bool arg_confirm_spawn = false;
96 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
97 static bool arg_switched_root = false;
98 static int arg_no_pager = -1;
99 static char ***arg_join_controllers = NULL;
100 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
101 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
102 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
103 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
104 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
105 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
106 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
107 static usec_t arg_runtime_watchdog = 0;
108 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
109 static char **arg_default_environment = NULL;
110 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
111 static uint64_t arg_capability_bounding_set_drop = 0;
112 static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
113 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
114 static Set* arg_syscall_archs = NULL;
115 static FILE* arg_serialization = NULL;
116 static bool arg_default_cpu_accounting = false;
117 static bool arg_default_blockio_accounting = false;
118 static bool arg_default_memory_accounting = false;
120 static void nop_handler(int sig) {}
122 static void pager_open_if_enabled(void) {
124 if (arg_no_pager <= 0)
130 noreturn static void crash(int sig) {
133 /* Pass this on immediately, if this is not PID 1 */
135 else if (!arg_dump_core)
136 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
138 struct sigaction sa = {
139 .sa_handler = nop_handler,
140 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
144 /* We want to wait for the core process, hence let's enable SIGCHLD */
145 sigaction(SIGCHLD, &sa, NULL);
149 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
152 struct rlimit rl = {};
154 /* Enable default signal handler for core dump */
156 sa.sa_handler = SIG_DFL;
157 sigaction(sig, &sa, NULL);
159 /* Don't limit the core dump size */
160 rl.rlim_cur = RLIM_INFINITY;
161 rl.rlim_max = RLIM_INFINITY;
162 setrlimit(RLIMIT_CORE, &rl);
164 /* Just to be sure... */
167 /* Raise the signal again */
170 assert_not_reached("We shouldn't be here...");
177 /* Order things nicely. */
178 r = wait_for_terminate(pid, &status);
180 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
181 else if (status.si_code != CLD_DUMPED)
182 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
184 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
189 chvt(arg_crash_chvt);
191 if (arg_crash_shell) {
192 struct sigaction sa = {
193 .sa_handler = SIG_IGN,
194 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
198 log_info("Executing crash shell in 10s...");
201 /* Let the kernel reap children for us */
202 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
206 log_error("Failed to fork off crash shell: %m");
208 make_console_stdio();
209 execl("/bin/sh", "/bin/sh", NULL);
211 log_error("execl() failed: %m");
215 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
218 log_info("Freezing execution.");
222 static void install_crash_handler(void) {
223 struct sigaction sa = {
225 .sa_flags = SA_NODEFER,
228 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
231 static int console_setup(bool do_reset) {
234 /* If we are init, we connect stdin/stdout/stderr to /dev/null
235 * and make sure we don't have a controlling tty. */
242 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
244 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
248 /* We don't want to force text mode.
249 * plymouth may be showing pictures already from initrd. */
250 r = reset_terminal_fd(tty_fd, false);
252 log_error("Failed to reset /dev/console: %s", strerror(-r));
258 static int set_default_unit(const char *u) {
267 free(arg_default_unit);
268 arg_default_unit = c;
273 static int parse_proc_cmdline_item(const char *key, const char *value) {
275 static const char * const rlmap[] = {
276 "emergency", SPECIAL_EMERGENCY_TARGET,
277 "-b", SPECIAL_EMERGENCY_TARGET,
278 "single", SPECIAL_RESCUE_TARGET,
279 "-s", SPECIAL_RESCUE_TARGET,
280 "s", SPECIAL_RESCUE_TARGET,
281 "S", SPECIAL_RESCUE_TARGET,
282 "1", SPECIAL_RESCUE_TARGET,
283 "2", SPECIAL_RUNLEVEL2_TARGET,
284 "3", SPECIAL_RUNLEVEL3_TARGET,
285 "4", SPECIAL_RUNLEVEL4_TARGET,
286 "5", SPECIAL_RUNLEVEL5_TARGET,
292 if (streq(key, "systemd.unit") && value) {
295 return set_default_unit(value);
297 } else if (streq(key, "rd.systemd.unit") && value) {
300 return set_default_unit(value);
302 } else if (streq(key, "systemd.log_target") && value) {
304 if (log_set_target_from_string(value) < 0)
305 log_warning("Failed to parse log target %s. Ignoring.", value);
307 } else if (streq(key, "systemd.log_level") && value) {
309 if (log_set_max_level_from_string(value) < 0)
310 log_warning("Failed to parse log level %s. Ignoring.", value);
312 } else if (streq(key, "systemd.log_color") && value) {
314 if (log_show_color_from_string(value) < 0)
315 log_warning("Failed to parse log color setting %s. Ignoring.", value);
317 } else if (streq(key, "systemd.log_location") && value) {
319 if (log_show_location_from_string(value) < 0)
320 log_warning("Failed to parse log location setting %s. Ignoring.", value);
322 } else if (streq(key, "systemd.dump_core") && value) {
324 r = parse_boolean(value);
326 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
330 } else if (streq(key, "systemd.crash_shell") && value) {
332 r = parse_boolean(value);
334 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
338 } else if (streq(key, "systemd.crash_chvt") && value) {
340 if (safe_atoi(value, &r) < 0)
341 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
345 } else if (streq(key, "systemd.confirm_spawn") && value) {
347 r = parse_boolean(value);
349 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
351 arg_confirm_spawn = r;
353 } else if (streq(key, "systemd.show_status") && value) {
355 r = parse_show_status(value, &arg_show_status);
357 log_warning("Failed to parse show status switch %s. Ignoring.", value);
359 } else if (streq(key, "systemd.default_standard_output") && value) {
361 r = exec_output_from_string(value);
363 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
365 arg_default_std_output = r;
367 } else if (streq(key, "systemd.default_standard_error") && value) {
369 r = exec_output_from_string(value);
371 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
373 arg_default_std_error = r;
375 } else if (streq(key, "systemd.setenv") && value) {
377 if (env_assignment_is_valid(value)) {
380 env = strv_env_set(arg_default_environment, value);
382 arg_default_environment = env;
384 log_warning("Setting environment variable '%s' failed, ignoring: %s", value, strerror(ENOMEM));
386 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
388 } else if (streq(key, "quiet") && !value) {
390 log_set_max_level(LOG_NOTICE);
392 if (arg_show_status == _SHOW_STATUS_UNSET)
393 arg_show_status = SHOW_STATUS_AUTO;
395 } else if (streq(key, "debug") && !value) {
397 log_set_max_level(LOG_DEBUG);
399 if (detect_container(NULL) > 0)
400 log_set_target(LOG_TARGET_CONSOLE);
402 } else if (!in_initrd() && !value) {
405 /* SysV compatibility */
406 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
407 if (streq(key, rlmap[i]))
408 return set_default_unit(rlmap[i+1]);
414 #define DEFINE_SETTER(name, func, descr) \
415 static int name(const char *unit, \
416 const char *filename, \
418 const char *section, \
419 unsigned section_line, \
420 const char *lvalue, \
422 const char *rvalue, \
434 log_syntax(unit, LOG_ERR, filename, line, -r, \
435 "Invalid " descr "'%s': %s", \
436 rvalue, strerror(-r)); \
441 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
442 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
443 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
444 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
446 static int config_parse_cpu_affinity2(
448 const char *filename,
451 unsigned section_line,
468 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
473 if (!(t = strndup(w, l)))
476 r = safe_atou(t, &cpu);
480 if (!(c = cpu_set_malloc(&ncpus)))
483 if (r < 0 || cpu >= ncpus) {
484 log_syntax(unit, LOG_ERR, filename, line, -r,
485 "Failed to parse CPU affinity '%s'", rvalue);
490 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
494 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
495 log_warning_unit(unit, "Failed to set CPU affinity: %m");
503 static int config_parse_show_status(
505 const char *filename,
508 unsigned section_line,
516 ShowStatus *b = data;
523 k = parse_show_status(rvalue, b);
525 log_syntax(unit, LOG_ERR, filename, line, -k,
526 "Failed to parse show status setting, ignoring: %s", rvalue);
533 static void strv_free_free(char ***l) {
545 static void free_join_controllers(void) {
546 strv_free_free(arg_join_controllers);
547 arg_join_controllers = NULL;
550 static int config_parse_join_controllers(const char *unit,
551 const char *filename,
554 unsigned section_line,
569 free_join_controllers();
571 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
574 s = strndup(w, length);
578 l = strv_split(s, ",");
583 if (strv_length(l) <= 1) {
588 if (!arg_join_controllers) {
589 arg_join_controllers = new(char**, 2);
590 if (!arg_join_controllers) {
595 arg_join_controllers[0] = l;
596 arg_join_controllers[1] = NULL;
603 t = new0(char**, n+2);
611 for (a = arg_join_controllers; *a; a++) {
613 if (strv_overlap(*a, l)) {
614 if (strv_extend_strv(&l, *a) < 0) {
634 t[n++] = strv_uniq(l);
636 strv_free_free(arg_join_controllers);
637 arg_join_controllers = t;
644 static int parse_config_file(void) {
646 const ConfigTableItem items[] = {
647 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
648 { "Manager", "LogTarget", config_parse_target, 0, NULL },
649 { "Manager", "LogColor", config_parse_color, 0, NULL },
650 { "Manager", "LogLocation", config_parse_location, 0, NULL },
651 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
652 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
653 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
654 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
655 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
656 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
657 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
658 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
659 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
661 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
663 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
664 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
665 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
666 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
667 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
668 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
669 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
670 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
671 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
672 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
673 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
674 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
675 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
676 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
677 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
678 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
679 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
680 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
681 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
682 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
683 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
684 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
685 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
686 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
687 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
688 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
689 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
690 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
691 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
697 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
698 config_parse(NULL, fn, NULL,
700 config_item_table_lookup, items,
701 false, false, true, NULL);
706 static int parse_argv(int argc, char *argv[]) {
709 ARG_LOG_LEVEL = 0x100,
719 ARG_DUMP_CONFIGURATION_ITEMS,
726 ARG_DEFAULT_STD_OUTPUT,
727 ARG_DEFAULT_STD_ERROR
730 static const struct option options[] = {
731 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
732 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
733 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
734 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
735 { "unit", required_argument, NULL, ARG_UNIT },
736 { "system", no_argument, NULL, ARG_SYSTEM },
737 { "user", no_argument, NULL, ARG_USER },
738 { "test", no_argument, NULL, ARG_TEST },
739 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
740 { "help", no_argument, NULL, 'h' },
741 { "version", no_argument, NULL, ARG_VERSION },
742 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
743 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
744 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
745 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
746 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
747 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
748 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
749 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
750 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
762 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
767 r = log_set_max_level_from_string(optarg);
769 log_error("Failed to parse log level %s.", optarg);
776 r = log_set_target_from_string(optarg);
778 log_error("Failed to parse log target %s.", optarg);
787 r = log_show_color_from_string(optarg);
789 log_error("Failed to parse log color setting %s.", optarg);
793 log_show_color(true);
797 case ARG_LOG_LOCATION:
799 r = log_show_location_from_string(optarg);
801 log_error("Failed to parse log location setting %s.", optarg);
805 log_show_location(true);
809 case ARG_DEFAULT_STD_OUTPUT:
810 r = exec_output_from_string(optarg);
812 log_error("Failed to parse default standard output setting %s.", optarg);
815 arg_default_std_output = r;
818 case ARG_DEFAULT_STD_ERROR:
819 r = exec_output_from_string(optarg);
821 log_error("Failed to parse default standard error output setting %s.", optarg);
824 arg_default_std_error = r;
829 r = set_default_unit(optarg);
831 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
838 arg_running_as = SYSTEMD_SYSTEM;
842 arg_running_as = SYSTEMD_USER;
846 arg_action = ACTION_TEST;
847 if (arg_no_pager < 0)
856 arg_action = ACTION_VERSION;
859 case ARG_DUMP_CONFIGURATION_ITEMS:
860 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
864 r = optarg ? parse_boolean(optarg) : 1;
866 log_error("Failed to parse dump core boolean %s.", optarg);
872 case ARG_CRASH_SHELL:
873 r = optarg ? parse_boolean(optarg) : 1;
875 log_error("Failed to parse crash shell boolean %s.", optarg);
881 case ARG_CONFIRM_SPAWN:
882 r = optarg ? parse_boolean(optarg) : 1;
884 log_error("Failed to parse confirm spawn boolean %s.", optarg);
887 arg_confirm_spawn = r;
890 case ARG_SHOW_STATUS:
892 r = parse_show_status(optarg, &arg_show_status);
894 log_error("Failed to parse show status boolean %s.", optarg);
898 arg_show_status = SHOW_STATUS_YES;
901 case ARG_DESERIALIZE: {
905 r = safe_atoi(optarg, &fd);
906 if (r < 0 || fd < 0) {
907 log_error("Failed to parse deserialize option %s.", optarg);
908 return r < 0 ? r : -EINVAL;
911 fd_cloexec(fd, true);
915 log_error("Failed to open serialization fd: %m");
919 if (arg_serialization)
920 fclose(arg_serialization);
922 arg_serialization = f;
927 case ARG_SWITCHED_ROOT:
928 arg_switched_root = true;
932 arg_action = ACTION_HELP;
933 if (arg_no_pager < 0)
938 log_set_max_level(LOG_DEBUG);
944 /* Just to eat away the sysvinit kernel
945 * cmdline args without getopt() error
946 * messages that we'll parse in
947 * parse_proc_cmdline_word() or ignore. */
952 log_error("Unknown option code %c", c);
959 if (optind < argc && getpid() != 1) {
960 /* Hmm, when we aren't run as init system
961 * let's complain about excess arguments */
963 log_error("Excess arguments.");
967 if (detect_container(NULL) > 0) {
970 /* All /proc/cmdline arguments the kernel didn't
971 * understand it passed to us. We're not really
972 * interested in that usually since /proc/cmdline is
973 * more interesting and complete. With one exception:
974 * if we are run in a container /proc/cmdline is not
975 * relevant for the container, hence we rely on argv[]
978 for (a = argv; a < argv + argc; a++) {
979 _cleanup_free_ char *w;
986 value = strchr(w, '=');
990 r = parse_proc_cmdline_item(w, value);
992 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1001 static int help(void) {
1003 printf("%s [OPTIONS...]\n\n"
1004 "Starts up and maintains the system or user services.\n\n"
1005 " -h --help Show this help\n"
1006 " --test Determine startup sequence, dump it and exit\n"
1007 " --no-pager Do not pipe output into a pager\n"
1008 " --dump-configuration-items Dump understood unit configuration items\n"
1009 " --unit=UNIT Set default unit\n"
1010 " --system Run a system instance, even if PID != 1\n"
1011 " --user Run a user instance\n"
1012 " --dump-core[=0|1] Dump core on crash\n"
1013 " --crash-shell[=0|1] Run shell on crash\n"
1014 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1015 " --show-status[=0|1] Show status updates on the console during bootup\n"
1016 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1017 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1018 " --log-color[=0|1] Highlight important log messages\n"
1019 " --log-location[=0|1] Include code location in log messages\n"
1020 " --default-standard-output= Set default standard output for services\n"
1021 " --default-standard-error= Set default standard error output for services\n",
1022 program_invocation_short_name);
1027 static int version(void) {
1028 puts(PACKAGE_STRING);
1029 puts(SYSTEMD_FEATURES);
1034 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1043 r = manager_open_serialization(m, &f);
1045 log_error("Failed to create serialization file: %s", strerror(-r));
1049 /* Make sure nothing is really destructed when we shut down */
1051 bus_manager_send_reloading(m, true);
1056 log_error("Failed to allocate fd set: %s", strerror(-r));
1060 r = manager_serialize(m, f, fds, switching_root);
1062 log_error("Failed to serialize state: %s", strerror(-r));
1066 if (fseeko(f, 0, SEEK_SET) < 0) {
1067 log_error("Failed to rewind serialization fd: %m");
1071 r = fd_cloexec(fileno(f), false);
1073 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1077 r = fdset_cloexec(fds, false);
1079 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1097 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1101 assert(saved_rlimit);
1103 /* Save the original RLIMIT_NOFILE so that we can reset it
1104 * later when transitioning from the initrd to the main
1105 * systemd or suchlike. */
1106 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1107 log_error("Reading RLIMIT_NOFILE failed: %m");
1111 /* Make sure forked processes get the default kernel setting */
1112 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1115 rl = newdup(struct rlimit, saved_rlimit, 1);
1119 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1122 /* Bump up the resource limit for ourselves substantially */
1123 nl.rlim_cur = nl.rlim_max = 64*1024;
1124 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1126 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1133 static void test_mtab(void) {
1135 static const char ok[] =
1136 "/proc/self/mounts\0"
1138 "../proc/self/mounts\0"
1141 _cleanup_free_ char *p = NULL;
1144 /* Check that /etc/mtab is a symlink to the right place or
1145 * non-existing. But certainly not a file, or a symlink to
1146 * some weird place... */
1148 r = readlink_malloc("/etc/mtab", &p);
1151 if (r >= 0 && nulstr_contains(ok, p))
1154 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1155 "This is not supported anymore. "
1156 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1159 static void test_usr(void) {
1161 /* Check that /usr is not a separate fs */
1163 if (dir_is_empty("/usr") <= 0)
1166 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1167 "Some things will probably break (sometimes even silently) in mysterious ways. "
1168 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1171 static int initialize_join_controllers(void) {
1172 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1173 * + "net_prio". We'd like to add "cpuset" to the mix, but
1174 * "cpuset" does't really work for groups with no initialized
1177 arg_join_controllers = new(char**, 3);
1178 if (!arg_join_controllers)
1181 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1182 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1183 arg_join_controllers[2] = NULL;
1185 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1186 free_join_controllers();
1193 static int enforce_syscall_archs(Set *archs) {
1195 scmp_filter_ctx *seccomp;
1200 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1204 SET_FOREACH(id, arg_syscall_archs, i) {
1205 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1209 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1214 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1216 log_error("Failed to unset NO_NEW_PRIVS: %s", strerror(-r));
1220 r = seccomp_load(seccomp);
1222 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1225 seccomp_release(seccomp);
1232 static int status_welcome(void) {
1233 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1236 r = parse_env_file("/etc/os-release", NEWLINE,
1237 "PRETTY_NAME", &pretty_name,
1238 "ANSI_COLOR", &ansi_color,
1241 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1242 "PRETTY_NAME", &pretty_name,
1243 "ANSI_COLOR", &ansi_color,
1247 if (r < 0 && r != -ENOENT)
1248 log_warning("Failed to read os-release file: %s", strerror(-r));
1250 return status_printf(NULL, false, false,
1251 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1252 isempty(ansi_color) ? "1" : ansi_color,
1253 isempty(pretty_name) ? "Linux" : pretty_name);
1256 static int write_container_id(void) {
1259 c = getenv("container");
1263 return write_string_file("/run/systemd/container", c);
1266 int main(int argc, char *argv[]) {
1268 int r, retval = EXIT_FAILURE;
1269 usec_t before_startup, after_startup;
1270 char timespan[FORMAT_TIMESPAN_MAX];
1272 bool reexecute = false;
1273 const char *shutdown_verb = NULL;
1274 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1275 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1276 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1277 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1278 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1279 static char systemd[] = "systemd";
1280 bool skip_setup = false;
1282 bool loaded_policy = false;
1283 bool arm_reboot_watchdog = false;
1284 bool queue_default_job = false;
1285 bool empty_etc = false;
1286 char *switch_root_dir = NULL, *switch_root_init = NULL;
1287 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1289 #ifdef HAVE_SYSV_COMPAT
1290 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1291 /* This is compatibility support for SysV, where
1292 * calling init as a user is identical to telinit. */
1295 execv(SYSTEMCTL_BINARY_PATH, argv);
1296 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1301 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1302 dual_timestamp_get(&userspace_timestamp);
1304 /* Determine if this is a reexecution or normal bootup. We do
1305 * the full command line parsing much later, so let's just
1306 * have a quick peek here. */
1307 if (strv_find(argv+1, "--deserialize"))
1310 /* If we have switched root, do all the special setup
1312 if (strv_find(argv+1, "--switched-root"))
1315 /* If we get started via the /sbin/init symlink then we are
1316 called 'init'. After a subsequent reexecution we are then
1317 called 'systemd'. That is confusing, hence let's call us
1318 systemd right-away. */
1319 program_invocation_short_name = systemd;
1320 prctl(PR_SET_NAME, systemd);
1325 log_show_color(isatty(STDERR_FILENO) > 0);
1327 /* Disable the umask logic */
1331 if (getpid() == 1 && detect_container(NULL) <= 0) {
1333 /* Running outside of a container as PID 1 */
1334 arg_running_as = SYSTEMD_SYSTEM;
1336 log_set_target(LOG_TARGET_KMSG);
1340 initrd_timestamp = userspace_timestamp;
1343 mount_setup_early();
1344 dual_timestamp_get(&security_start_timestamp);
1345 if (selinux_setup(&loaded_policy) < 0)
1347 if (ima_setup() < 0)
1349 if (smack_setup(&loaded_policy) < 0)
1351 dual_timestamp_get(&security_finish_timestamp);
1354 if (label_init(NULL) < 0)
1358 if (clock_is_localtime() > 0) {
1362 * The very first call of settimeofday() also does a time warp in the kernel.
1364 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1365 * external tools to take care of maintaining the RTC and do all adjustments.
1366 * This matches the behavior of Windows, which leaves the RTC alone if the
1367 * registry tells that the RTC runs in UTC.
1369 r = clock_set_timezone(&min);
1371 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1373 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1374 } else if (!in_initrd()) {
1376 * Do a dummy very first call to seal the kernel's time warp magic.
1378 * Do not call this this from inside the initrd. The initrd might not
1379 * carry /etc/adjtime with LOCAL, but the real system could be set up
1380 * that way. In such case, we need to delay the time-warp or the sealing
1381 * until we reach the real system.
1383 * Do no set the kernel's timezone. The concept of local time cannot
1384 * be supported reliably, the time will jump or be incorrect at every daylight
1385 * saving time change. All kernel local time concepts will be treated
1388 clock_reset_timewarp();
1392 /* Set the default for later on, but don't actually
1393 * open the logs like this for now. Note that if we
1394 * are transitioning from the initrd there might still
1395 * be journal fd open, and we shouldn't attempt
1396 * opening that before we parsed /proc/cmdline which
1397 * might redirect output elsewhere. */
1398 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1400 } else if (getpid() == 1) {
1401 /* Running inside a container, as PID 1 */
1402 arg_running_as = SYSTEMD_SYSTEM;
1403 log_set_target(LOG_TARGET_CONSOLE);
1404 log_close_console(); /* force reopen of /dev/console */
1407 /* For the later on, see above... */
1408 log_set_target(LOG_TARGET_JOURNAL);
1410 /* clear the kernel timestamp,
1411 * because we are in a container */
1412 kernel_timestamp.monotonic = 0ULL;
1413 kernel_timestamp.realtime = 0ULL;
1416 /* Running as user instance */
1417 arg_running_as = SYSTEMD_USER;
1418 log_set_target(LOG_TARGET_AUTO);
1421 /* clear the kernel timestamp,
1422 * because we are not PID 1 */
1423 kernel_timestamp.monotonic = 0ULL;
1424 kernel_timestamp.realtime = 0ULL;
1427 /* Initialize default unit */
1428 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1430 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1434 r = initialize_join_controllers();
1438 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1439 * /proc/$PID/fd is available. */
1440 if (getpid() == 1) {
1441 r = mount_setup(loaded_policy);
1446 /* Reset all signal handlers. */
1447 assert_se(reset_all_signal_handlers() == 0);
1449 ignore_signals(SIGNALS_IGNORE, -1);
1451 if (parse_config_file() < 0)
1454 if (arg_running_as == SYSTEMD_SYSTEM)
1455 if (parse_proc_cmdline(parse_proc_cmdline_item) < 0)
1458 log_parse_environment();
1460 if (parse_argv(argc, argv) < 0)
1463 if (arg_action == ACTION_TEST &&
1465 log_error("Don't run test mode as root.");
1469 if (arg_running_as == SYSTEMD_USER &&
1470 arg_action == ACTION_RUN &&
1472 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1476 if (arg_running_as == SYSTEMD_SYSTEM &&
1477 arg_action == ACTION_RUN &&
1478 running_in_chroot() > 0) {
1479 log_error("Cannot be run in a chroot() environment.");
1483 if (arg_action == ACTION_TEST)
1486 pager_open_if_enabled();
1488 if (arg_action == ACTION_HELP) {
1491 } else if (arg_action == ACTION_VERSION) {
1494 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1495 unit_dump_config_items(stdout);
1496 retval = EXIT_SUCCESS;
1498 } else if (arg_action == ACTION_DONE) {
1499 retval = EXIT_SUCCESS;
1503 if (arg_running_as == SYSTEMD_USER &&
1504 !getenv("XDG_RUNTIME_DIR")) {
1505 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1509 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1511 /* Close logging fds, in order not to confuse fdset below */
1514 /* Remember open file descriptors for later deserialization */
1515 r = fdset_new_fill(&fds);
1517 log_error("Failed to allocate fd set: %s", strerror(-r));
1520 fdset_cloexec(fds, true);
1522 if (arg_serialization)
1523 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1525 if (arg_running_as == SYSTEMD_SYSTEM)
1526 /* Become a session leader if we aren't one yet. */
1529 /* Move out of the way, so that we won't block unmounts */
1530 assert_se(chdir("/") == 0);
1532 /* Reset the console, but only if this is really init and we
1533 * are freshly booted */
1534 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1535 console_setup(getpid() == 1 && !skip_setup);
1537 /* Open the logging devices, if possible and necessary */
1540 if (arg_show_status == _SHOW_STATUS_UNSET)
1541 arg_show_status = SHOW_STATUS_YES;
1543 /* Make sure we leave a core dump without panicing the
1545 if (getpid() == 1) {
1546 install_crash_handler();
1548 r = mount_cgroup_controllers(arg_join_controllers);
1553 if (arg_running_as == SYSTEMD_SYSTEM) {
1554 const char *virtualization = NULL;
1556 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1557 arg_action == ACTION_TEST ? "test " : "" );
1559 detect_virtualization(&virtualization);
1561 log_info("Detected virtualization '%s'.", virtualization);
1563 write_container_id();
1565 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1568 log_info("Running in initial RAM disk.");
1570 /* Let's check whether /etc is already populated. We
1571 * don't actually really check for that, but use
1572 * /etc/machine-id as flag file. This allows container
1573 * managers and installers to provision a couple of
1574 * files already. If the container manager wants to
1575 * provision the machine ID itself it should pass
1576 * $container_uuid to PID 1.*/
1578 empty_etc = access("/etc/machine-id", F_OK) < 0;
1580 log_info("Running with unpopulated /etc.");
1582 _cleanup_free_ char *t;
1584 t = uid_to_name(getuid());
1585 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1586 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1589 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1590 if (arg_show_status > 0 || plymouth_running())
1597 machine_id_setup(NULL);
1604 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1605 watchdog_set_timeout(&arg_runtime_watchdog);
1607 if (arg_timer_slack_nsec != NSEC_INFINITY)
1608 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1609 log_error("Failed to adjust timer slack: %m");
1611 if (arg_capability_bounding_set_drop) {
1612 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1614 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1617 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1619 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1624 if (arg_syscall_archs) {
1625 r = enforce_syscall_archs(arg_syscall_archs);
1630 if (arg_running_as == SYSTEMD_USER) {
1631 /* Become reaper of our children */
1632 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1633 log_warning("Failed to make us a subreaper: %m");
1634 if (errno == EINVAL)
1635 log_info("Perhaps the kernel version is too old (< 3.4?)");
1639 if (arg_running_as == SYSTEMD_SYSTEM) {
1640 bump_rlimit_nofile(&saved_rlimit_nofile);
1643 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1645 log_warning("Failed to populate /etc with preset unit settings, ignoring: %s", strerror(-r));
1647 log_info("Populated /etc with preset unit settings.");
1651 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1653 log_error("Failed to allocate manager object: %s", strerror(-r));
1657 m->confirm_spawn = arg_confirm_spawn;
1658 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1659 m->default_std_output = arg_default_std_output;
1660 m->default_std_error = arg_default_std_error;
1661 m->default_restart_usec = arg_default_restart_usec;
1662 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1663 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1664 m->default_start_limit_interval = arg_default_start_limit_interval;
1665 m->default_start_limit_burst = arg_default_start_limit_burst;
1666 m->default_cpu_accounting = arg_default_cpu_accounting;
1667 m->default_blockio_accounting = arg_default_blockio_accounting;
1668 m->default_memory_accounting = arg_default_memory_accounting;
1669 m->runtime_watchdog = arg_runtime_watchdog;
1670 m->shutdown_watchdog = arg_shutdown_watchdog;
1671 m->userspace_timestamp = userspace_timestamp;
1672 m->kernel_timestamp = kernel_timestamp;
1673 m->initrd_timestamp = initrd_timestamp;
1674 m->security_start_timestamp = security_start_timestamp;
1675 m->security_finish_timestamp = security_finish_timestamp;
1677 manager_set_default_rlimits(m, arg_default_rlimit);
1678 manager_environment_add(m, NULL, arg_default_environment);
1679 manager_set_show_status(m, arg_show_status);
1680 manager_set_first_boot(m, empty_etc);
1682 /* Remember whether we should queue the default job */
1683 queue_default_job = !arg_serialization || arg_switched_root;
1685 before_startup = now(CLOCK_MONOTONIC);
1687 r = manager_startup(m, arg_serialization, fds);
1689 log_error("Failed to fully start up daemon: %s", strerror(-r));
1691 /* This will close all file descriptors that were opened, but
1692 * not claimed by any unit. */
1696 if (arg_serialization) {
1697 fclose(arg_serialization);
1698 arg_serialization = NULL;
1701 if (queue_default_job) {
1702 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1703 Unit *target = NULL;
1704 Job *default_unit_job;
1706 log_debug("Activating default unit: %s", arg_default_unit);
1708 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1710 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1711 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1712 log_error("Failed to load default target: %s", strerror(-target->load_error));
1713 else if (target->load_state == UNIT_MASKED)
1714 log_error("Default target masked.");
1716 if (!target || target->load_state != UNIT_LOADED) {
1717 log_info("Trying to load rescue target...");
1719 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1721 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1723 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1724 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1726 } else if (target->load_state == UNIT_MASKED) {
1727 log_error("Rescue target masked.");
1732 assert(target->load_state == UNIT_LOADED);
1734 if (arg_action == ACTION_TEST) {
1735 printf("-> By units:\n");
1736 manager_dump_units(m, stdout, "\t");
1739 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1741 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1743 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1745 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1749 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1753 m->default_unit_job_id = default_unit_job->id;
1755 after_startup = now(CLOCK_MONOTONIC);
1756 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1757 "Loaded units and determined initial transaction in %s.",
1758 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1760 if (arg_action == ACTION_TEST) {
1761 printf("-> By jobs:\n");
1762 manager_dump_jobs(m, stdout, "\t");
1763 retval = EXIT_SUCCESS;
1769 r = manager_loop(m);
1771 log_error("Failed to run mainloop: %s", strerror(-r));
1775 switch (m->exit_code) {
1778 retval = EXIT_SUCCESS;
1782 case MANAGER_RELOAD:
1783 log_info("Reloading.");
1784 r = manager_reload(m);
1786 log_error("Failed to reload: %s", strerror(-r));
1789 case MANAGER_REEXECUTE:
1791 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1795 log_notice("Reexecuting.");
1798 case MANAGER_SWITCH_ROOT:
1799 /* Steal the switch root parameters */
1800 switch_root_dir = m->switch_root;
1801 switch_root_init = m->switch_root_init;
1802 m->switch_root = m->switch_root_init = NULL;
1804 if (!switch_root_init)
1805 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1809 log_notice("Switching root.");
1812 case MANAGER_REBOOT:
1813 case MANAGER_POWEROFF:
1815 case MANAGER_KEXEC: {
1816 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1817 [MANAGER_REBOOT] = "reboot",
1818 [MANAGER_POWEROFF] = "poweroff",
1819 [MANAGER_HALT] = "halt",
1820 [MANAGER_KEXEC] = "kexec"
1823 assert_se(shutdown_verb = table[m->exit_code]);
1824 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1826 log_notice("Shutting down.");
1831 assert_not_reached("Unknown exit code.");
1843 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1844 free(arg_default_rlimit[j]);
1845 arg_default_rlimit[j] = NULL;
1848 free(arg_default_unit);
1849 arg_default_unit = NULL;
1851 free_join_controllers();
1853 strv_free(arg_default_environment);
1854 arg_default_environment = NULL;
1856 set_free(arg_syscall_archs);
1857 arg_syscall_archs = NULL;
1863 unsigned i, args_size;
1866 /* Close and disarm the watchdog, so that the new
1867 * instance can reinitialize it, but doesn't get
1868 * rebooted while we do that */
1869 watchdog_close(true);
1871 /* Reset the RLIMIT_NOFILE to the kernel default, so
1872 * that the new systemd can pass the kernel default to
1873 * its child processes */
1874 if (saved_rlimit_nofile.rlim_cur > 0)
1875 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1877 if (switch_root_dir) {
1878 /* Kill all remaining processes from the
1879 * initrd, but don't wait for them, so that we
1880 * can handle the SIGCHLD for them after
1882 broadcast_signal(SIGTERM, false, true);
1884 /* And switch root */
1885 r = switch_root(switch_root_dir);
1887 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1890 args_size = MAX(6, argc+1);
1891 args = newa(const char*, args_size);
1893 if (!switch_root_init) {
1896 /* First try to spawn ourselves with the right
1897 * path, and with full serialization. We do
1898 * this only if the user didn't specify an
1899 * explicit init to spawn. */
1901 assert(arg_serialization);
1904 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1908 args[i++] = SYSTEMD_BINARY_PATH;
1909 if (switch_root_dir)
1910 args[i++] = "--switched-root";
1911 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1912 args[i++] = "--deserialize";
1916 /* do not pass along the environment we inherit from the kernel or initrd */
1917 if (switch_root_dir)
1920 assert(i <= args_size);
1921 execv(args[0], (char* const*) args);
1924 /* Try the fallback, if there is any, without any
1925 * serialization. We pass the original argv[] and
1926 * envp[]. (Well, modulo the ordering changes due to
1927 * getopt() in argv[], and some cleanups in envp[],
1928 * but let's hope that doesn't matter.) */
1930 if (arg_serialization) {
1931 fclose(arg_serialization);
1932 arg_serialization = NULL;
1940 /* Reopen the console */
1941 make_console_stdio();
1943 for (j = 1, i = 1; j < (unsigned) argc; j++)
1944 args[i++] = argv[j];
1946 assert(i <= args_size);
1948 /* reenable any blocked signals, especially important
1949 * if we switch from initial ramdisk to init=... */
1950 reset_all_signal_handlers();
1952 assert_se(sigemptyset(&ss) == 0);
1953 assert_se(sigprocmask(SIG_SETMASK, &ss, NULL) == 0);
1955 if (switch_root_init) {
1956 args[0] = switch_root_init;
1957 execv(args[0], (char* const*) args);
1958 log_warning("Failed to execute configured init, trying fallback: %m");
1961 args[0] = "/sbin/init";
1962 execv(args[0], (char* const*) args);
1964 if (errno == ENOENT) {
1965 log_warning("No /sbin/init, trying fallback");
1967 args[0] = "/bin/sh";
1969 execv(args[0], (char* const*) args);
1970 log_error("Failed to execute /bin/sh, giving up: %m");
1972 log_warning("Failed to execute /sbin/init, giving up: %m");
1975 if (arg_serialization) {
1976 fclose(arg_serialization);
1977 arg_serialization = NULL;
1985 #ifdef HAVE_VALGRIND_VALGRIND_H
1986 /* If we are PID 1 and running under valgrind, then let's exit
1987 * here explicitly. valgrind will only generate nice output on
1988 * exit(), not on exec(), hence let's do the former not the
1990 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1994 if (shutdown_verb) {
1995 char log_level[DECIMAL_STR_MAX(int) + 1];
1996 const char* command_line[9] = {
1997 SYSTEMD_SHUTDOWN_BINARY_PATH,
1999 "--log-level", log_level,
2003 _cleanup_strv_free_ char **env_block = NULL;
2005 assert(command_line[pos] == NULL);
2006 env_block = strv_copy(environ);
2008 snprintf(log_level, sizeof(log_level), "%d", log_get_max_level());
2010 switch (log_get_target()) {
2011 case LOG_TARGET_KMSG:
2012 case LOG_TARGET_JOURNAL_OR_KMSG:
2013 case LOG_TARGET_SYSLOG_OR_KMSG:
2014 command_line[pos++] = "kmsg";
2017 case LOG_TARGET_CONSOLE:
2019 command_line[pos++] = "console";
2023 if (log_get_show_color())
2024 command_line[pos++] = "--log-color";
2026 if (log_get_show_location())
2027 command_line[pos++] = "--log-location";
2029 assert(pos < ELEMENTSOF(command_line));
2031 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2034 /* If we reboot let's set the shutdown
2035 * watchdog and tell the shutdown binary to
2036 * repeatedly ping it */
2037 watchdog_set_timeout(&arg_shutdown_watchdog);
2038 watchdog_close(false);
2040 /* Tell the binary how often to ping, ignore failure */
2041 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2042 strv_push(&env_block, e);
2044 watchdog_close(true);
2046 /* Avoid the creation of new processes forked by the
2047 * kernel; at this point, we will not listen to the
2049 if (detect_container(NULL) <= 0)
2050 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2052 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2053 log_error("Failed to execute shutdown binary, %s: %m",
2054 getpid() == 1 ? "freezing" : "quitting");