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>
39 #include "sd-daemon.h"
40 #include "sd-messages.h"
44 #include "load-fragment.h"
47 #include "conf-parser.h"
55 #include "path-util.h"
56 #include "switch-root.h"
57 #include "capability.h"
62 #include "dbus-manager.h"
63 #include "bus-error.h"
66 #include "mount-setup.h"
67 #include "loopback-setup.h"
68 #include "hostname-setup.h"
69 #include "machine-id-setup.h"
70 #include "selinux-setup.h"
71 #include "ima-setup.h"
72 #include "smack-setup.h"
74 #include "kmod-setup.h"
82 ACTION_DUMP_CONFIGURATION_ITEMS,
84 } arg_action = ACTION_RUN;
86 static char *arg_default_unit = NULL;
87 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
89 static bool arg_dump_core = true;
90 static bool arg_crash_shell = false;
91 static int arg_crash_chvt = -1;
92 static bool arg_confirm_spawn = false;
93 static bool arg_show_status = true;
94 static bool arg_switched_root = false;
95 static char ***arg_join_controllers = NULL;
96 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
97 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
98 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
99 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
100 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
101 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
102 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
103 static usec_t arg_runtime_watchdog = 0;
104 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
105 static char **arg_default_environment = NULL;
106 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
107 static uint64_t arg_capability_bounding_set_drop = 0;
108 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
110 static FILE* serialization = NULL;
112 static void nop_handler(int sig) {
115 noreturn static void crash(int sig) {
118 /* Pass this on immediately, if this is not PID 1 */
120 else if (!arg_dump_core)
121 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
123 struct sigaction sa = {
124 .sa_handler = nop_handler,
125 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
129 /* We want to wait for the core process, hence let's enable SIGCHLD */
130 sigaction(SIGCHLD, &sa, NULL);
134 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
137 struct rlimit rl = {};
139 /* Enable default signal handler for core dump */
141 sa.sa_handler = SIG_DFL;
142 sigaction(sig, &sa, NULL);
144 /* Don't limit the core dump size */
145 rl.rlim_cur = RLIM_INFINITY;
146 rl.rlim_max = RLIM_INFINITY;
147 setrlimit(RLIMIT_CORE, &rl);
149 /* Just to be sure... */
152 /* Raise the signal again */
155 assert_not_reached("We shouldn't be here...");
162 /* Order things nicely. */
163 r = wait_for_terminate(pid, &status);
165 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
166 else if (status.si_code != CLD_DUMPED)
167 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
169 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
174 chvt(arg_crash_chvt);
176 if (arg_crash_shell) {
177 struct sigaction sa = {
178 .sa_handler = SIG_IGN,
179 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
183 log_info("Executing crash shell in 10s...");
186 /* Let the kernel reap children for us */
187 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
191 log_error("Failed to fork off crash shell: %m");
193 make_console_stdio();
194 execl("/bin/sh", "/bin/sh", NULL);
196 log_error("execl() failed: %m");
200 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
203 log_info("Freezing execution.");
207 static void install_crash_handler(void) {
208 struct sigaction sa = {
210 .sa_flags = SA_NODEFER,
213 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
216 static int console_setup(bool do_reset) {
219 /* If we are init, we connect stdin/stdout/stderr to /dev/null
220 * and make sure we don't have a controlling tty. */
227 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
229 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
233 /* We don't want to force text mode.
234 * plymouth may be showing pictures already from initrd. */
235 r = reset_terminal_fd(tty_fd, false);
237 log_error("Failed to reset /dev/console: %s", strerror(-r));
239 close_nointr_nofail(tty_fd);
243 static int set_default_unit(const char *u) {
252 free(arg_default_unit);
253 arg_default_unit = c;
258 static int parse_proc_cmdline_word(const char *word) {
260 static const char * const rlmap[] = {
261 "emergency", SPECIAL_EMERGENCY_TARGET,
262 "-b", SPECIAL_EMERGENCY_TARGET,
263 "single", SPECIAL_RESCUE_TARGET,
264 "-s", SPECIAL_RESCUE_TARGET,
265 "s", SPECIAL_RESCUE_TARGET,
266 "S", SPECIAL_RESCUE_TARGET,
267 "1", SPECIAL_RESCUE_TARGET,
268 "2", SPECIAL_RUNLEVEL2_TARGET,
269 "3", SPECIAL_RUNLEVEL3_TARGET,
270 "4", SPECIAL_RUNLEVEL4_TARGET,
271 "5", SPECIAL_RUNLEVEL5_TARGET,
276 if (startswith(word, "systemd.unit=")) {
279 return set_default_unit(word + 13);
281 } else if (startswith(word, "rd.systemd.unit=")) {
284 return set_default_unit(word + 16);
286 } else if (startswith(word, "systemd.log_target=")) {
288 if (log_set_target_from_string(word + 19) < 0)
289 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
291 } else if (startswith(word, "systemd.log_level=")) {
293 if (log_set_max_level_from_string(word + 18) < 0)
294 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
296 } else if (startswith(word, "systemd.log_color=")) {
298 if (log_show_color_from_string(word + 18) < 0)
299 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
301 } else if (startswith(word, "systemd.log_location=")) {
303 if (log_show_location_from_string(word + 21) < 0)
304 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
306 } else if (startswith(word, "systemd.dump_core=")) {
309 if ((r = parse_boolean(word + 18)) < 0)
310 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
314 } else if (startswith(word, "systemd.crash_shell=")) {
317 if ((r = parse_boolean(word + 20)) < 0)
318 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
322 } else if (startswith(word, "systemd.confirm_spawn=")) {
325 if ((r = parse_boolean(word + 22)) < 0)
326 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
328 arg_confirm_spawn = r;
330 } else if (startswith(word, "systemd.crash_chvt=")) {
333 if (safe_atoi(word + 19, &k) < 0)
334 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
338 } else if (startswith(word, "systemd.show_status=")) {
341 if ((r = parse_boolean(word + 20)) < 0)
342 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
345 } else if (startswith(word, "systemd.default_standard_output=")) {
348 if ((r = exec_output_from_string(word + 32)) < 0)
349 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
351 arg_default_std_output = r;
352 } else if (startswith(word, "systemd.default_standard_error=")) {
355 if ((r = exec_output_from_string(word + 31)) < 0)
356 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
358 arg_default_std_error = r;
359 } else if (startswith(word, "systemd.setenv=")) {
360 _cleanup_free_ char *cenv = NULL;
362 cenv = strdup(word + 15);
366 if (env_assignment_is_valid(cenv)) {
369 env = strv_env_set(arg_default_environment, cenv);
371 arg_default_environment = env;
373 log_warning("Setting environment variable '%s' failed, ignoring: %m", cenv);
375 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
377 } else if (startswith(word, "systemd.") ||
378 (in_initrd() && startswith(word, "rd.systemd."))) {
382 /* Ignore systemd.journald.xyz and friends */
384 if (startswith(c, "rd."))
386 if (startswith(c, "systemd."))
388 if (c[strcspn(c, ".=")] != '.') {
390 log_warning("Unknown kernel switch %s. Ignoring.", word);
392 log_info("Supported kernel switches:\n"
393 "systemd.unit=UNIT Default unit to start\n"
394 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
395 "systemd.dump_core=0|1 Dump core on crash\n"
396 "systemd.crash_shell=0|1 Run shell on crash\n"
397 "systemd.crash_chvt=N Change to VT #N on crash\n"
398 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
399 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
400 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
402 "systemd.log_level=LEVEL Log level\n"
403 "systemd.log_color=0|1 Highlight important log messages\n"
404 "systemd.log_location=0|1 Include code location in log messages\n"
405 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
406 " Set default log output for services\n"
407 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
408 " Set default log error output for services\n"
409 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
412 } else if (streq(word, "quiet"))
413 arg_show_status = false;
414 else if (streq(word, "debug")) {
415 /* Log to kmsg, the journal socket will fill up before the
416 * journal is started and tools running during that time
417 * will block with every log message for for 60 seconds,
418 * before they give up. */
419 log_set_max_level(LOG_DEBUG);
420 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_KMSG);
421 } else if (!in_initrd()) {
424 /* SysV compatibility */
425 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
426 if (streq(word, rlmap[i]))
427 return set_default_unit(rlmap[i+1]);
433 #define DEFINE_SETTER(name, func, descr) \
434 static int name(const char *unit, \
435 const char *filename, \
437 const char *section, \
438 unsigned section_line, \
439 const char *lvalue, \
441 const char *rvalue, \
453 log_syntax(unit, LOG_ERR, filename, line, -r, \
454 "Invalid " descr "'%s': %s", \
455 rvalue, strerror(-r)); \
460 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
461 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
462 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
463 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
465 static int config_parse_cpu_affinity2(const char *unit,
466 const char *filename,
469 unsigned section_line,
486 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
491 if (!(t = strndup(w, l)))
494 r = safe_atou(t, &cpu);
498 if (!(c = cpu_set_malloc(&ncpus)))
501 if (r < 0 || cpu >= ncpus) {
502 log_syntax(unit, LOG_ERR, filename, line, -r,
503 "Failed to parse CPU affinity '%s'", rvalue);
508 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
512 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
513 log_warning_unit(unit, "Failed to set CPU affinity: %m");
521 static void strv_free_free(char ***l) {
533 static void free_join_controllers(void) {
534 strv_free_free(arg_join_controllers);
535 arg_join_controllers = NULL;
538 static int config_parse_join_controllers(const char *unit,
539 const char *filename,
542 unsigned section_line,
557 free_join_controllers();
559 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
562 s = strndup(w, length);
566 l = strv_split(s, ",");
571 if (strv_length(l) <= 1) {
576 if (!arg_join_controllers) {
577 arg_join_controllers = new(char**, 2);
578 if (!arg_join_controllers) {
583 arg_join_controllers[0] = l;
584 arg_join_controllers[1] = NULL;
591 t = new0(char**, n+2);
599 for (a = arg_join_controllers; *a; a++) {
601 if (strv_overlap(*a, l)) {
604 c = strv_merge(*a, l);
627 t[n++] = strv_uniq(l);
629 strv_free_free(arg_join_controllers);
630 arg_join_controllers = t;
637 static int parse_config_file(void) {
639 const ConfigTableItem items[] = {
640 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
641 { "Manager", "LogTarget", config_parse_target, 0, NULL },
642 { "Manager", "LogColor", config_parse_color, 0, NULL },
643 { "Manager", "LogLocation", config_parse_location, 0, NULL },
644 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
645 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
646 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
647 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
648 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
649 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
650 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
651 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
652 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
653 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
654 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
655 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
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 },
660 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
661 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
662 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
663 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
664 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
665 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
666 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
667 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
668 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
669 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
670 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
671 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
672 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
673 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
674 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
675 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
676 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
677 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
678 { NULL, NULL, NULL, 0, NULL }
681 _cleanup_fclose_ FILE *f;
685 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
691 log_warning("Failed to open configuration file '%s': %m", fn);
695 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
697 log_warning("Failed to parse configuration file: %s", strerror(-r));
702 static int parse_proc_cmdline(void) {
703 _cleanup_free_ char *line = NULL;
708 r = proc_cmdline(&line);
710 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
714 FOREACH_WORD_QUOTED(w, l, line, state) {
715 _cleanup_free_ char *word;
717 word = strndup(w, l);
721 r = parse_proc_cmdline_word(word);
723 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
731 static int parse_argv(int argc, char *argv[]) {
734 ARG_LOG_LEVEL = 0x100,
743 ARG_DUMP_CONFIGURATION_ITEMS,
750 ARG_DEFAULT_STD_OUTPUT,
751 ARG_DEFAULT_STD_ERROR
754 static const struct option options[] = {
755 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
756 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
757 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
758 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
759 { "unit", required_argument, NULL, ARG_UNIT },
760 { "system", no_argument, NULL, ARG_SYSTEM },
761 { "user", no_argument, NULL, ARG_USER },
762 { "test", no_argument, NULL, ARG_TEST },
763 { "help", no_argument, NULL, 'h' },
764 { "version", no_argument, NULL, ARG_VERSION },
765 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
766 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
767 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
768 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
769 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
770 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
771 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
772 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
773 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
785 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
790 if ((r = log_set_max_level_from_string(optarg)) < 0) {
791 log_error("Failed to parse log level %s.", optarg);
799 if ((r = log_set_target_from_string(optarg)) < 0) {
800 log_error("Failed to parse log target %s.", optarg);
809 if ((r = log_show_color_from_string(optarg)) < 0) {
810 log_error("Failed to parse log color setting %s.", optarg);
814 log_show_color(true);
818 case ARG_LOG_LOCATION:
821 if ((r = log_show_location_from_string(optarg)) < 0) {
822 log_error("Failed to parse log location setting %s.", optarg);
826 log_show_location(true);
830 case ARG_DEFAULT_STD_OUTPUT:
832 if ((r = exec_output_from_string(optarg)) < 0) {
833 log_error("Failed to parse default standard output setting %s.", optarg);
836 arg_default_std_output = r;
839 case ARG_DEFAULT_STD_ERROR:
841 if ((r = exec_output_from_string(optarg)) < 0) {
842 log_error("Failed to parse default standard error output setting %s.", optarg);
845 arg_default_std_error = r;
850 if ((r = set_default_unit(optarg)) < 0) {
851 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
858 arg_running_as = SYSTEMD_SYSTEM;
862 arg_running_as = SYSTEMD_USER;
866 arg_action = ACTION_TEST;
870 arg_action = ACTION_VERSION;
873 case ARG_DUMP_CONFIGURATION_ITEMS:
874 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
878 r = optarg ? parse_boolean(optarg) : 1;
880 log_error("Failed to parse dump core boolean %s.", optarg);
886 case ARG_CRASH_SHELL:
887 r = optarg ? parse_boolean(optarg) : 1;
889 log_error("Failed to parse crash shell boolean %s.", optarg);
895 case ARG_CONFIRM_SPAWN:
896 r = optarg ? parse_boolean(optarg) : 1;
898 log_error("Failed to parse confirm spawn boolean %s.", optarg);
901 arg_confirm_spawn = r;
904 case ARG_SHOW_STATUS:
905 r = optarg ? parse_boolean(optarg) : 1;
907 log_error("Failed to parse show status boolean %s.", optarg);
913 case ARG_DESERIALIZE: {
917 r = safe_atoi(optarg, &fd);
918 if (r < 0 || fd < 0) {
919 log_error("Failed to parse deserialize option %s.", optarg);
920 return r < 0 ? r : -EINVAL;
923 fd_cloexec(fd, true);
927 log_error("Failed to open serialization fd: %m");
932 fclose(serialization);
939 case ARG_SWITCHED_ROOT:
940 arg_switched_root = true;
944 arg_action = ACTION_HELP;
948 log_set_max_level(LOG_DEBUG);
954 /* Just to eat away the sysvinit kernel
955 * cmdline args without getopt() error
956 * messages that we'll parse in
957 * parse_proc_cmdline_word() or ignore. */
962 log_error("Unknown option code %c", c);
969 if (optind < argc && getpid() != 1) {
970 /* Hmm, when we aren't run as init system
971 * let's complain about excess arguments */
973 log_error("Excess arguments.");
977 if (detect_container(NULL) > 0) {
980 /* All /proc/cmdline arguments the kernel didn't
981 * understand it passed to us. We're not really
982 * interested in that usually since /proc/cmdline is
983 * more interesting and complete. With one exception:
984 * if we are run in a container /proc/cmdline is not
985 * relevant for the container, hence we rely on argv[]
988 for (a = argv; a < argv + argc; a++) {
989 r = parse_proc_cmdline_word(*a);
991 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1000 static int help(void) {
1002 printf("%s [OPTIONS...]\n\n"
1003 "Starts up and maintains the system or user services.\n\n"
1004 " -h --help Show this help\n"
1005 " --test Determine startup sequence, dump it and exit\n"
1006 " --dump-configuration-items Dump understood unit configuration items\n"
1007 " --unit=UNIT Set default unit\n"
1008 " --system Run a system instance, even if PID != 1\n"
1009 " --user Run a user instance\n"
1010 " --dump-core[=0|1] Dump core on crash\n"
1011 " --crash-shell[=0|1] Run shell on crash\n"
1012 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1013 " --show-status[=0|1] Show status updates on the console during bootup\n"
1014 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1015 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1016 " --log-color[=0|1] Highlight important log messages\n"
1017 " --log-location[=0|1] Include code location in log messages\n"
1018 " --default-standard-output= Set default standard output for services\n"
1019 " --default-standard-error= Set default standard error output for services\n",
1020 program_invocation_short_name);
1025 static int version(void) {
1026 puts(PACKAGE_STRING);
1027 puts(SYSTEMD_FEATURES);
1032 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1041 r = manager_open_serialization(m, &f);
1043 log_error("Failed to create serialization file: %s", strerror(-r));
1047 /* Make sure nothing is really destructed when we shut down */
1049 bus_manager_send_reloading(m, true);
1054 log_error("Failed to allocate fd set: %s", strerror(-r));
1058 r = manager_serialize(m, f, fds, switching_root);
1060 log_error("Failed to serialize state: %s", strerror(-r));
1064 if (fseeko(f, 0, SEEK_SET) < 0) {
1065 log_error("Failed to rewind serialization fd: %m");
1069 r = fd_cloexec(fileno(f), false);
1071 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1075 r = fdset_cloexec(fds, false);
1077 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1095 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1099 assert(saved_rlimit);
1101 /* Save the original RLIMIT_NOFILE so that we can reset it
1102 * later when transitioning from the initrd to the main
1103 * systemd or suchlike. */
1104 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1105 log_error("Reading RLIMIT_NOFILE failed: %m");
1109 /* Make sure forked processes get the default kernel setting */
1110 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1113 rl = newdup(struct rlimit, saved_rlimit, 1);
1117 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1120 /* Bump up the resource limit for ourselves substantially */
1121 nl.rlim_cur = nl.rlim_max = 64*1024;
1122 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1124 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1131 static void test_mtab(void) {
1134 /* Check that /etc/mtab is a symlink */
1136 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1139 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1146 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1147 "This is not supported anymore. "
1148 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1151 static void test_usr(void) {
1153 /* Check that /usr is not a separate fs */
1155 if (dir_is_empty("/usr") <= 0)
1158 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1159 "Some things will probably break (sometimes even silently) in mysterious ways. "
1160 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1163 static void test_cgroups(void) {
1165 if (access("/proc/cgroups", F_OK) >= 0)
1168 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1169 "Systems without control groups are not supported. "
1170 "We will now sleep for 10s, and then continue boot-up. "
1171 "Expect breakage and please do not file bugs. "
1172 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1173 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1178 static int initialize_join_controllers(void) {
1179 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1180 * + "net_prio". We'd like to add "cpuset" to the mix, but
1181 * "cpuset" does't really work for groups with no initialized
1184 arg_join_controllers = new(char**, 3);
1185 if (!arg_join_controllers)
1188 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1189 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1190 arg_join_controllers[2] = NULL;
1192 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1193 free_join_controllers();
1200 int main(int argc, char *argv[]) {
1202 int r, retval = EXIT_FAILURE;
1203 usec_t before_startup, after_startup;
1204 char timespan[FORMAT_TIMESPAN_MAX];
1206 bool reexecute = false;
1207 const char *shutdown_verb = NULL;
1208 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1209 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1210 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1211 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1212 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1213 static char systemd[] = "systemd";
1214 bool skip_setup = false;
1216 bool loaded_policy = false;
1217 bool arm_reboot_watchdog = false;
1218 bool queue_default_job = false;
1219 char *switch_root_dir = NULL, *switch_root_init = NULL;
1220 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1222 #ifdef HAVE_SYSV_COMPAT
1223 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1224 /* This is compatibility support for SysV, where
1225 * calling init as a user is identical to telinit. */
1228 execv(SYSTEMCTL_BINARY_PATH, argv);
1229 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1234 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1235 dual_timestamp_get(&userspace_timestamp);
1237 /* Determine if this is a reexecution or normal bootup. We do
1238 * the full command line parsing much later, so let's just
1239 * have a quick peek here. */
1240 if (strv_find(argv+1, "--deserialize"))
1243 /* If we have switched root, do all the special setup
1245 if (strv_find(argv+1, "--switched-root"))
1248 /* If we get started via the /sbin/init symlink then we are
1249 called 'init'. After a subsequent reexecution we are then
1250 called 'systemd'. That is confusing, hence let's call us
1251 systemd right-away. */
1252 program_invocation_short_name = systemd;
1253 prctl(PR_SET_NAME, systemd);
1258 log_show_color(isatty(STDERR_FILENO) > 0);
1260 /* Disable the umask logic */
1264 if (getpid() == 1 && detect_container(NULL) <= 0) {
1266 /* Running outside of a container as PID 1 */
1267 arg_running_as = SYSTEMD_SYSTEM;
1269 log_set_target(LOG_TARGET_KMSG);
1273 initrd_timestamp = userspace_timestamp;
1276 mount_setup_early();
1277 dual_timestamp_get(&security_start_timestamp);
1278 if (selinux_setup(&loaded_policy) < 0)
1280 if (ima_setup() < 0)
1282 if (smack_setup() < 0)
1284 dual_timestamp_get(&security_finish_timestamp);
1287 if (label_init(NULL) < 0)
1291 if (hwclock_is_localtime() > 0) {
1294 /* The first-time call to settimeofday() does a time warp in the kernel */
1295 r = hwclock_set_timezone(&min);
1297 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1299 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1300 } else if (!in_initrd()) {
1302 * Do dummy first-time call to seal the kernel's time warp magic
1304 * Do not call this this from inside the initrd. The initrd might not
1305 * carry /etc/adjtime with LOCAL, but the real system could be set up
1306 * that way. In such case, we need to delay the time-warp or the sealing
1307 * until we reach the real system.
1309 hwclock_reset_timezone();
1311 /* Tell the kernel our timezone */
1312 r = hwclock_set_timezone(NULL);
1314 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1318 /* Set the default for later on, but don't actually
1319 * open the logs like this for now. Note that if we
1320 * are transitioning from the initrd there might still
1321 * be journal fd open, and we shouldn't attempt
1322 * opening that before we parsed /proc/cmdline which
1323 * might redirect output elsewhere. */
1324 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1326 } else if (getpid() == 1) {
1327 /* Running inside a container, as PID 1 */
1328 arg_running_as = SYSTEMD_SYSTEM;
1329 log_set_target(LOG_TARGET_CONSOLE);
1330 log_close_console(); /* force reopen of /dev/console */
1333 /* For the later on, see above... */
1334 log_set_target(LOG_TARGET_JOURNAL);
1336 /* clear the kernel timestamp,
1337 * because we are in a container */
1338 kernel_timestamp.monotonic = 0ULL;
1339 kernel_timestamp.realtime = 0ULL;
1342 /* Running as user instance */
1343 arg_running_as = SYSTEMD_USER;
1344 log_set_target(LOG_TARGET_AUTO);
1347 /* clear the kernel timestamp,
1348 * because we are not PID 1 */
1349 kernel_timestamp.monotonic = 0ULL;
1350 kernel_timestamp.realtime = 0ULL;
1353 /* Initialize default unit */
1354 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1356 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1360 r = initialize_join_controllers();
1364 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1365 * /proc/$PID/fd is available. */
1366 if (getpid() == 1) {
1367 r = mount_setup(loaded_policy);
1372 /* Reset all signal handlers. */
1373 assert_se(reset_all_signal_handlers() == 0);
1375 ignore_signals(SIGNALS_IGNORE, -1);
1377 if (parse_config_file() < 0)
1380 if (arg_running_as == SYSTEMD_SYSTEM)
1381 if (parse_proc_cmdline() < 0)
1384 log_parse_environment();
1386 if (parse_argv(argc, argv) < 0)
1389 if (arg_action == ACTION_TEST &&
1391 log_error("Don't run test mode as root.");
1395 if (arg_running_as == SYSTEMD_USER &&
1396 arg_action == ACTION_RUN &&
1398 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1402 if (arg_running_as == SYSTEMD_SYSTEM &&
1403 arg_action == ACTION_RUN &&
1404 running_in_chroot() > 0) {
1405 log_error("Cannot be run in a chroot() environment.");
1409 if (arg_action == ACTION_HELP) {
1412 } else if (arg_action == ACTION_VERSION) {
1415 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1416 unit_dump_config_items(stdout);
1417 retval = EXIT_SUCCESS;
1419 } else if (arg_action == ACTION_DONE) {
1420 retval = EXIT_SUCCESS;
1424 if (arg_running_as == SYSTEMD_USER &&
1425 !getenv("XDG_RUNTIME_DIR")) {
1426 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1430 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1432 /* Close logging fds, in order not to confuse fdset below */
1435 /* Remember open file descriptors for later deserialization */
1436 r = fdset_new_fill(&fds);
1438 log_error("Failed to allocate fd set: %s", strerror(-r));
1441 fdset_cloexec(fds, true);
1444 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1446 if (arg_running_as == SYSTEMD_SYSTEM)
1447 /* Become a session leader if we aren't one yet. */
1450 /* Move out of the way, so that we won't block unmounts */
1451 assert_se(chdir("/") == 0);
1453 /* Reset the console, but only if this is really init and we
1454 * are freshly booted */
1455 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1456 console_setup(getpid() == 1 && !skip_setup);
1458 /* Open the logging devices, if possible and necessary */
1461 /* Make sure we leave a core dump without panicing the
1463 if (getpid() == 1) {
1464 install_crash_handler();
1466 r = mount_cgroup_controllers(arg_join_controllers);
1471 if (arg_running_as == SYSTEMD_SYSTEM) {
1472 const char *virtualization = NULL;
1474 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1476 detect_virtualization(&virtualization);
1478 log_info("Detected virtualization '%s'.", virtualization);
1481 log_info("Running in initial RAM disk.");
1484 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1486 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1487 if (arg_show_status || plymouth_running())
1491 if (detect_container(NULL) <= 0)
1503 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1504 watchdog_set_timeout(&arg_runtime_watchdog);
1506 if (arg_timer_slack_nsec != (nsec_t) -1)
1507 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1508 log_error("Failed to adjust timer slack: %m");
1510 if (arg_capability_bounding_set_drop) {
1511 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1513 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1516 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1518 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1523 if (arg_running_as == SYSTEMD_USER) {
1524 /* Become reaper of our children */
1525 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1526 log_warning("Failed to make us a subreaper: %m");
1527 if (errno == EINVAL)
1528 log_info("Perhaps the kernel version is too old (< 3.4?)");
1532 if (arg_running_as == SYSTEMD_SYSTEM)
1533 bump_rlimit_nofile(&saved_rlimit_nofile);
1535 r = manager_new(arg_running_as, &m);
1537 log_error("Failed to allocate manager object: %s", strerror(-r));
1541 m->confirm_spawn = arg_confirm_spawn;
1542 m->default_std_output = arg_default_std_output;
1543 m->default_std_error = arg_default_std_error;
1544 m->default_restart_usec = arg_default_restart_usec;
1545 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1546 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1547 m->default_start_limit_interval = arg_default_start_limit_interval;
1548 m->default_start_limit_burst = arg_default_start_limit_burst;
1549 m->runtime_watchdog = arg_runtime_watchdog;
1550 m->shutdown_watchdog = arg_shutdown_watchdog;
1551 m->userspace_timestamp = userspace_timestamp;
1552 m->kernel_timestamp = kernel_timestamp;
1553 m->initrd_timestamp = initrd_timestamp;
1554 m->security_start_timestamp = security_start_timestamp;
1555 m->security_finish_timestamp = security_finish_timestamp;
1557 manager_set_default_rlimits(m, arg_default_rlimit);
1559 if (arg_default_environment)
1560 manager_environment_add(m, NULL, arg_default_environment);
1562 manager_set_show_status(m, arg_show_status);
1564 /* Remember whether we should queue the default job */
1565 queue_default_job = !serialization || arg_switched_root;
1567 before_startup = now(CLOCK_MONOTONIC);
1569 r = manager_startup(m, serialization, fds);
1571 log_error("Failed to fully start up daemon: %s", strerror(-r));
1573 /* This will close all file descriptors that were opened, but
1574 * not claimed by any unit. */
1578 if (serialization) {
1579 fclose(serialization);
1580 serialization = NULL;
1583 if (queue_default_job) {
1584 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1585 Unit *target = NULL;
1586 Job *default_unit_job;
1588 log_debug("Activating default unit: %s", arg_default_unit);
1590 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1592 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1593 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1594 log_error("Failed to load default target: %s", strerror(-target->load_error));
1595 else if (target->load_state == UNIT_MASKED)
1596 log_error("Default target masked.");
1598 if (!target || target->load_state != UNIT_LOADED) {
1599 log_info("Trying to load rescue target...");
1601 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1603 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1605 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1606 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1608 } else if (target->load_state == UNIT_MASKED) {
1609 log_error("Rescue target masked.");
1614 assert(target->load_state == UNIT_LOADED);
1616 if (arg_action == ACTION_TEST) {
1617 printf("-> By units:\n");
1618 manager_dump_units(m, stdout, "\t");
1621 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1623 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1625 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1627 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1631 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1635 m->default_unit_job_id = default_unit_job->id;
1637 after_startup = now(CLOCK_MONOTONIC);
1638 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1639 "Loaded units and determined initial transaction in %s.",
1640 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1642 if (arg_action == ACTION_TEST) {
1643 printf("-> By jobs:\n");
1644 manager_dump_jobs(m, stdout, "\t");
1645 retval = EXIT_SUCCESS;
1651 r = manager_loop(m);
1653 log_error("Failed to run mainloop: %s", strerror(-r));
1657 switch (m->exit_code) {
1660 retval = EXIT_SUCCESS;
1664 case MANAGER_RELOAD:
1665 log_info("Reloading.");
1666 r = manager_reload(m);
1668 log_error("Failed to reload: %s", strerror(-r));
1671 case MANAGER_REEXECUTE:
1673 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1677 log_notice("Reexecuting.");
1680 case MANAGER_SWITCH_ROOT:
1681 /* Steal the switch root parameters */
1682 switch_root_dir = m->switch_root;
1683 switch_root_init = m->switch_root_init;
1684 m->switch_root = m->switch_root_init = NULL;
1686 if (!switch_root_init)
1687 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1691 log_notice("Switching root.");
1694 case MANAGER_REBOOT:
1695 case MANAGER_POWEROFF:
1697 case MANAGER_KEXEC: {
1698 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1699 [MANAGER_REBOOT] = "reboot",
1700 [MANAGER_POWEROFF] = "poweroff",
1701 [MANAGER_HALT] = "halt",
1702 [MANAGER_KEXEC] = "kexec"
1705 assert_se(shutdown_verb = table[m->exit_code]);
1706 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1708 log_notice("Shutting down.");
1713 assert_not_reached("Unknown exit code.");
1721 for (j = 0; j < RLIMIT_NLIMITS; j++)
1722 free(arg_default_rlimit[j]);
1724 free(arg_default_unit);
1725 free_join_controllers();
1731 unsigned i, args_size;
1733 /* Close and disarm the watchdog, so that the new
1734 * instance can reinitialize it, but doesn't get
1735 * rebooted while we do that */
1736 watchdog_close(true);
1738 /* Reset the RLIMIT_NOFILE to the kernel default, so
1739 * that the new systemd can pass the kernel default to
1740 * its child processes */
1741 if (saved_rlimit_nofile.rlim_cur > 0)
1742 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1744 if (switch_root_dir) {
1745 /* Kill all remaining processes from the
1746 * initrd, but don't wait for them, so that we
1747 * can handle the SIGCHLD for them after
1749 broadcast_signal(SIGTERM, false, true);
1751 /* And switch root */
1752 r = switch_root(switch_root_dir);
1754 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1757 args_size = MAX(6, argc+1);
1758 args = newa(const char*, args_size);
1760 if (!switch_root_init) {
1763 /* First try to spawn ourselves with the right
1764 * path, and with full serialization. We do
1765 * this only if the user didn't specify an
1766 * explicit init to spawn. */
1768 assert(serialization);
1771 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1775 args[i++] = SYSTEMD_BINARY_PATH;
1776 if (switch_root_dir)
1777 args[i++] = "--switched-root";
1778 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1779 args[i++] = "--deserialize";
1783 /* do not pass along the environment we inherit from the kernel or initrd */
1784 if (switch_root_dir)
1787 assert(i <= args_size);
1788 execv(args[0], (char* const*) args);
1791 /* Try the fallback, if there is any, without any
1792 * serialization. We pass the original argv[] and
1793 * envp[]. (Well, modulo the ordering changes due to
1794 * getopt() in argv[], and some cleanups in envp[],
1795 * but let's hope that doesn't matter.) */
1797 if (serialization) {
1798 fclose(serialization);
1799 serialization = NULL;
1807 /* Reopen the console */
1808 make_console_stdio();
1810 for (j = 1, i = 1; j < argc; j++)
1811 args[i++] = argv[j];
1813 assert(i <= args_size);
1815 if (switch_root_init) {
1816 args[0] = switch_root_init;
1817 execv(args[0], (char* const*) args);
1818 log_warning("Failed to execute configured init, trying fallback: %m");
1821 args[0] = "/sbin/init";
1822 execv(args[0], (char* const*) args);
1824 if (errno == ENOENT) {
1825 log_warning("No /sbin/init, trying fallback");
1827 args[0] = "/bin/sh";
1829 execv(args[0], (char* const*) args);
1830 log_error("Failed to execute /bin/sh, giving up: %m");
1832 log_warning("Failed to execute /sbin/init, giving up: %m");
1836 fclose(serialization);
1841 #ifdef HAVE_VALGRIND_VALGRIND_H
1842 /* If we are PID 1 and running under valgrind, then let's exit
1843 * here explicitly. valgrind will only generate nice output on
1844 * exit(), not on exec(), hence let's do the former not the
1846 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1850 if (shutdown_verb) {
1851 const char * command_line[] = {
1852 SYSTEMD_SHUTDOWN_BINARY_PATH,
1858 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1861 /* If we reboot let's set the shutdown
1862 * watchdog and tell the shutdown binary to
1863 * repeatedly ping it */
1864 watchdog_set_timeout(&arg_shutdown_watchdog);
1865 watchdog_close(false);
1867 /* Tell the binary how often to ping */
1868 snprintf(e, sizeof(e), "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog);
1871 env_block = strv_append(environ, e);
1873 env_block = strv_copy(environ);
1874 watchdog_close(true);
1877 /* Avoid the creation of new processes forked by the
1878 * kernel; at this point, we will not listen to the
1880 if (detect_container(NULL) <= 0)
1881 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1883 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1885 log_error("Failed to execute shutdown binary, freezing: %m");