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)) {
602 if (strv_extend_strv(&l, *a) < 0) {
622 t[n++] = strv_uniq(l);
624 strv_free_free(arg_join_controllers);
625 arg_join_controllers = t;
632 static int parse_config_file(void) {
634 const ConfigTableItem items[] = {
635 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
636 { "Manager", "LogTarget", config_parse_target, 0, NULL },
637 { "Manager", "LogColor", config_parse_color, 0, NULL },
638 { "Manager", "LogLocation", config_parse_location, 0, NULL },
639 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
640 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
641 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
642 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
643 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
644 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
645 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
646 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
647 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
648 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
649 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
650 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
651 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
652 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
653 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
654 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
655 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
656 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
657 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
658 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
659 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
660 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
661 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
662 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
663 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
664 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
665 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
666 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
667 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
668 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
669 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
670 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
671 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
672 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
673 { NULL, NULL, NULL, 0, NULL }
676 _cleanup_fclose_ FILE *f;
680 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
686 log_warning("Failed to open configuration file '%s': %m", fn);
690 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
692 log_warning("Failed to parse configuration file: %s", strerror(-r));
697 static int parse_proc_cmdline(void) {
698 _cleanup_free_ char *line = NULL;
703 r = proc_cmdline(&line);
705 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
709 FOREACH_WORD_QUOTED(w, l, line, state) {
710 _cleanup_free_ char *word;
712 word = strndup(w, l);
716 r = parse_proc_cmdline_word(word);
718 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
726 static int parse_argv(int argc, char *argv[]) {
729 ARG_LOG_LEVEL = 0x100,
738 ARG_DUMP_CONFIGURATION_ITEMS,
745 ARG_DEFAULT_STD_OUTPUT,
746 ARG_DEFAULT_STD_ERROR
749 static const struct option options[] = {
750 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
751 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
752 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
753 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
754 { "unit", required_argument, NULL, ARG_UNIT },
755 { "system", no_argument, NULL, ARG_SYSTEM },
756 { "user", no_argument, NULL, ARG_USER },
757 { "test", no_argument, NULL, ARG_TEST },
758 { "help", no_argument, NULL, 'h' },
759 { "version", no_argument, NULL, ARG_VERSION },
760 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
761 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
762 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
763 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
764 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
765 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
766 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
767 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
768 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
780 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
785 if ((r = log_set_max_level_from_string(optarg)) < 0) {
786 log_error("Failed to parse log level %s.", optarg);
794 if ((r = log_set_target_from_string(optarg)) < 0) {
795 log_error("Failed to parse log target %s.", optarg);
804 if ((r = log_show_color_from_string(optarg)) < 0) {
805 log_error("Failed to parse log color setting %s.", optarg);
809 log_show_color(true);
813 case ARG_LOG_LOCATION:
816 if ((r = log_show_location_from_string(optarg)) < 0) {
817 log_error("Failed to parse log location setting %s.", optarg);
821 log_show_location(true);
825 case ARG_DEFAULT_STD_OUTPUT:
827 if ((r = exec_output_from_string(optarg)) < 0) {
828 log_error("Failed to parse default standard output setting %s.", optarg);
831 arg_default_std_output = r;
834 case ARG_DEFAULT_STD_ERROR:
836 if ((r = exec_output_from_string(optarg)) < 0) {
837 log_error("Failed to parse default standard error output setting %s.", optarg);
840 arg_default_std_error = r;
845 if ((r = set_default_unit(optarg)) < 0) {
846 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
853 arg_running_as = SYSTEMD_SYSTEM;
857 arg_running_as = SYSTEMD_USER;
861 arg_action = ACTION_TEST;
865 arg_action = ACTION_VERSION;
868 case ARG_DUMP_CONFIGURATION_ITEMS:
869 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
873 r = optarg ? parse_boolean(optarg) : 1;
875 log_error("Failed to parse dump core boolean %s.", optarg);
881 case ARG_CRASH_SHELL:
882 r = optarg ? parse_boolean(optarg) : 1;
884 log_error("Failed to parse crash shell boolean %s.", optarg);
890 case ARG_CONFIRM_SPAWN:
891 r = optarg ? parse_boolean(optarg) : 1;
893 log_error("Failed to parse confirm spawn boolean %s.", optarg);
896 arg_confirm_spawn = r;
899 case ARG_SHOW_STATUS:
900 r = optarg ? parse_boolean(optarg) : 1;
902 log_error("Failed to parse show status boolean %s.", optarg);
908 case ARG_DESERIALIZE: {
912 r = safe_atoi(optarg, &fd);
913 if (r < 0 || fd < 0) {
914 log_error("Failed to parse deserialize option %s.", optarg);
915 return r < 0 ? r : -EINVAL;
918 fd_cloexec(fd, true);
922 log_error("Failed to open serialization fd: %m");
927 fclose(serialization);
934 case ARG_SWITCHED_ROOT:
935 arg_switched_root = true;
939 arg_action = ACTION_HELP;
943 log_set_max_level(LOG_DEBUG);
949 /* Just to eat away the sysvinit kernel
950 * cmdline args without getopt() error
951 * messages that we'll parse in
952 * parse_proc_cmdline_word() or ignore. */
957 log_error("Unknown option code %c", c);
964 if (optind < argc && getpid() != 1) {
965 /* Hmm, when we aren't run as init system
966 * let's complain about excess arguments */
968 log_error("Excess arguments.");
972 if (detect_container(NULL) > 0) {
975 /* All /proc/cmdline arguments the kernel didn't
976 * understand it passed to us. We're not really
977 * interested in that usually since /proc/cmdline is
978 * more interesting and complete. With one exception:
979 * if we are run in a container /proc/cmdline is not
980 * relevant for the container, hence we rely on argv[]
983 for (a = argv; a < argv + argc; a++) {
984 r = parse_proc_cmdline_word(*a);
986 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
995 static int help(void) {
997 printf("%s [OPTIONS...]\n\n"
998 "Starts up and maintains the system or user services.\n\n"
999 " -h --help Show this help\n"
1000 " --test Determine startup sequence, dump it and exit\n"
1001 " --dump-configuration-items Dump understood unit configuration items\n"
1002 " --unit=UNIT Set default unit\n"
1003 " --system Run a system instance, even if PID != 1\n"
1004 " --user Run a user instance\n"
1005 " --dump-core[=0|1] Dump core on crash\n"
1006 " --crash-shell[=0|1] Run shell on crash\n"
1007 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1008 " --show-status[=0|1] Show status updates on the console during bootup\n"
1009 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1010 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1011 " --log-color[=0|1] Highlight important log messages\n"
1012 " --log-location[=0|1] Include code location in log messages\n"
1013 " --default-standard-output= Set default standard output for services\n"
1014 " --default-standard-error= Set default standard error output for services\n",
1015 program_invocation_short_name);
1020 static int version(void) {
1021 puts(PACKAGE_STRING);
1022 puts(SYSTEMD_FEATURES);
1027 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1036 r = manager_open_serialization(m, &f);
1038 log_error("Failed to create serialization file: %s", strerror(-r));
1042 /* Make sure nothing is really destructed when we shut down */
1044 bus_manager_send_reloading(m, true);
1049 log_error("Failed to allocate fd set: %s", strerror(-r));
1053 r = manager_serialize(m, f, fds, switching_root);
1055 log_error("Failed to serialize state: %s", strerror(-r));
1059 if (fseeko(f, 0, SEEK_SET) < 0) {
1060 log_error("Failed to rewind serialization fd: %m");
1064 r = fd_cloexec(fileno(f), false);
1066 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1070 r = fdset_cloexec(fds, false);
1072 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1090 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1094 assert(saved_rlimit);
1096 /* Save the original RLIMIT_NOFILE so that we can reset it
1097 * later when transitioning from the initrd to the main
1098 * systemd or suchlike. */
1099 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1100 log_error("Reading RLIMIT_NOFILE failed: %m");
1104 /* Make sure forked processes get the default kernel setting */
1105 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1108 rl = newdup(struct rlimit, saved_rlimit, 1);
1112 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1115 /* Bump up the resource limit for ourselves substantially */
1116 nl.rlim_cur = nl.rlim_max = 64*1024;
1117 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1119 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1126 static void test_mtab(void) {
1129 /* Check that /etc/mtab is a symlink */
1131 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1134 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1141 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1142 "This is not supported anymore. "
1143 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1146 static void test_usr(void) {
1148 /* Check that /usr is not a separate fs */
1150 if (dir_is_empty("/usr") <= 0)
1153 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1154 "Some things will probably break (sometimes even silently) in mysterious ways. "
1155 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1158 static void test_cgroups(void) {
1160 if (access("/proc/cgroups", F_OK) >= 0)
1163 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1164 "Systems without control groups are not supported. "
1165 "We will now sleep for 10s, and then continue boot-up. "
1166 "Expect breakage and please do not file bugs. "
1167 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1168 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1173 static int initialize_join_controllers(void) {
1174 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1175 * + "net_prio". We'd like to add "cpuset" to the mix, but
1176 * "cpuset" does't really work for groups with no initialized
1179 arg_join_controllers = new(char**, 3);
1180 if (!arg_join_controllers)
1183 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1184 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1185 arg_join_controllers[2] = NULL;
1187 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1188 free_join_controllers();
1195 int main(int argc, char *argv[]) {
1197 int r, retval = EXIT_FAILURE;
1198 usec_t before_startup, after_startup;
1199 char timespan[FORMAT_TIMESPAN_MAX];
1201 bool reexecute = false;
1202 const char *shutdown_verb = NULL;
1203 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1204 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1205 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1206 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1207 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1208 static char systemd[] = "systemd";
1209 bool skip_setup = false;
1211 bool loaded_policy = false;
1212 bool arm_reboot_watchdog = false;
1213 bool queue_default_job = false;
1214 char *switch_root_dir = NULL, *switch_root_init = NULL;
1215 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1217 #ifdef HAVE_SYSV_COMPAT
1218 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1219 /* This is compatibility support for SysV, where
1220 * calling init as a user is identical to telinit. */
1223 execv(SYSTEMCTL_BINARY_PATH, argv);
1224 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1229 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1230 dual_timestamp_get(&userspace_timestamp);
1232 /* Determine if this is a reexecution or normal bootup. We do
1233 * the full command line parsing much later, so let's just
1234 * have a quick peek here. */
1235 if (strv_find(argv+1, "--deserialize"))
1238 /* If we have switched root, do all the special setup
1240 if (strv_find(argv+1, "--switched-root"))
1243 /* If we get started via the /sbin/init symlink then we are
1244 called 'init'. After a subsequent reexecution we are then
1245 called 'systemd'. That is confusing, hence let's call us
1246 systemd right-away. */
1247 program_invocation_short_name = systemd;
1248 prctl(PR_SET_NAME, systemd);
1253 log_show_color(isatty(STDERR_FILENO) > 0);
1255 /* Disable the umask logic */
1259 if (getpid() == 1 && detect_container(NULL) <= 0) {
1261 /* Running outside of a container as PID 1 */
1262 arg_running_as = SYSTEMD_SYSTEM;
1264 log_set_target(LOG_TARGET_KMSG);
1268 initrd_timestamp = userspace_timestamp;
1271 mount_setup_early();
1272 dual_timestamp_get(&security_start_timestamp);
1273 if (selinux_setup(&loaded_policy) < 0)
1275 if (ima_setup() < 0)
1277 if (smack_setup() < 0)
1279 dual_timestamp_get(&security_finish_timestamp);
1282 if (label_init(NULL) < 0)
1286 if (hwclock_is_localtime() > 0) {
1289 /* The first-time call to settimeofday() does a time warp in the kernel */
1290 r = hwclock_set_timezone(&min);
1292 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1294 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1295 } else if (!in_initrd()) {
1297 * Do dummy first-time call to seal the kernel's time warp magic
1299 * Do not call this this from inside the initrd. The initrd might not
1300 * carry /etc/adjtime with LOCAL, but the real system could be set up
1301 * that way. In such case, we need to delay the time-warp or the sealing
1302 * until we reach the real system.
1304 hwclock_reset_timezone();
1306 /* Tell the kernel our timezone */
1307 r = hwclock_set_timezone(NULL);
1309 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1313 /* Set the default for later on, but don't actually
1314 * open the logs like this for now. Note that if we
1315 * are transitioning from the initrd there might still
1316 * be journal fd open, and we shouldn't attempt
1317 * opening that before we parsed /proc/cmdline which
1318 * might redirect output elsewhere. */
1319 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1321 } else if (getpid() == 1) {
1322 /* Running inside a container, as PID 1 */
1323 arg_running_as = SYSTEMD_SYSTEM;
1324 log_set_target(LOG_TARGET_CONSOLE);
1325 log_close_console(); /* force reopen of /dev/console */
1328 /* For the later on, see above... */
1329 log_set_target(LOG_TARGET_JOURNAL);
1331 /* clear the kernel timestamp,
1332 * because we are in a container */
1333 kernel_timestamp.monotonic = 0ULL;
1334 kernel_timestamp.realtime = 0ULL;
1337 /* Running as user instance */
1338 arg_running_as = SYSTEMD_USER;
1339 log_set_target(LOG_TARGET_AUTO);
1342 /* clear the kernel timestamp,
1343 * because we are not PID 1 */
1344 kernel_timestamp.monotonic = 0ULL;
1345 kernel_timestamp.realtime = 0ULL;
1348 /* Initialize default unit */
1349 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1351 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1355 r = initialize_join_controllers();
1359 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1360 * /proc/$PID/fd is available. */
1361 if (getpid() == 1) {
1362 r = mount_setup(loaded_policy);
1367 /* Reset all signal handlers. */
1368 assert_se(reset_all_signal_handlers() == 0);
1370 ignore_signals(SIGNALS_IGNORE, -1);
1372 if (parse_config_file() < 0)
1375 if (arg_running_as == SYSTEMD_SYSTEM)
1376 if (parse_proc_cmdline() < 0)
1379 log_parse_environment();
1381 if (parse_argv(argc, argv) < 0)
1384 if (arg_action == ACTION_TEST &&
1386 log_error("Don't run test mode as root.");
1390 if (arg_running_as == SYSTEMD_USER &&
1391 arg_action == ACTION_RUN &&
1393 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1397 if (arg_running_as == SYSTEMD_SYSTEM &&
1398 arg_action == ACTION_RUN &&
1399 running_in_chroot() > 0) {
1400 log_error("Cannot be run in a chroot() environment.");
1404 if (arg_action == ACTION_HELP) {
1407 } else if (arg_action == ACTION_VERSION) {
1410 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1411 unit_dump_config_items(stdout);
1412 retval = EXIT_SUCCESS;
1414 } else if (arg_action == ACTION_DONE) {
1415 retval = EXIT_SUCCESS;
1419 if (arg_running_as == SYSTEMD_USER &&
1420 !getenv("XDG_RUNTIME_DIR")) {
1421 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1425 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1427 /* Close logging fds, in order not to confuse fdset below */
1430 /* Remember open file descriptors for later deserialization */
1431 r = fdset_new_fill(&fds);
1433 log_error("Failed to allocate fd set: %s", strerror(-r));
1436 fdset_cloexec(fds, true);
1439 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1441 if (arg_running_as == SYSTEMD_SYSTEM)
1442 /* Become a session leader if we aren't one yet. */
1445 /* Move out of the way, so that we won't block unmounts */
1446 assert_se(chdir("/") == 0);
1448 /* Reset the console, but only if this is really init and we
1449 * are freshly booted */
1450 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1451 console_setup(getpid() == 1 && !skip_setup);
1453 /* Open the logging devices, if possible and necessary */
1456 /* Make sure we leave a core dump without panicing the
1458 if (getpid() == 1) {
1459 install_crash_handler();
1461 r = mount_cgroup_controllers(arg_join_controllers);
1466 if (arg_running_as == SYSTEMD_SYSTEM) {
1467 const char *virtualization = NULL;
1469 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1471 detect_virtualization(&virtualization);
1473 log_info("Detected virtualization '%s'.", virtualization);
1476 log_info("Running in initial RAM disk.");
1479 _cleanup_free_ char *t = uid_to_name(getuid());
1480 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1484 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1485 if (arg_show_status || plymouth_running())
1489 if (detect_container(NULL) <= 0)
1501 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1502 watchdog_set_timeout(&arg_runtime_watchdog);
1504 if (arg_timer_slack_nsec != (nsec_t) -1)
1505 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1506 log_error("Failed to adjust timer slack: %m");
1508 if (arg_capability_bounding_set_drop) {
1509 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1511 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1514 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1516 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1521 if (arg_running_as == SYSTEMD_USER) {
1522 /* Become reaper of our children */
1523 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1524 log_warning("Failed to make us a subreaper: %m");
1525 if (errno == EINVAL)
1526 log_info("Perhaps the kernel version is too old (< 3.4?)");
1530 if (arg_running_as == SYSTEMD_SYSTEM)
1531 bump_rlimit_nofile(&saved_rlimit_nofile);
1533 r = manager_new(arg_running_as, &m);
1535 log_error("Failed to allocate manager object: %s", strerror(-r));
1539 m->confirm_spawn = arg_confirm_spawn;
1540 m->default_std_output = arg_default_std_output;
1541 m->default_std_error = arg_default_std_error;
1542 m->default_restart_usec = arg_default_restart_usec;
1543 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1544 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1545 m->default_start_limit_interval = arg_default_start_limit_interval;
1546 m->default_start_limit_burst = arg_default_start_limit_burst;
1547 m->runtime_watchdog = arg_runtime_watchdog;
1548 m->shutdown_watchdog = arg_shutdown_watchdog;
1549 m->userspace_timestamp = userspace_timestamp;
1550 m->kernel_timestamp = kernel_timestamp;
1551 m->initrd_timestamp = initrd_timestamp;
1552 m->security_start_timestamp = security_start_timestamp;
1553 m->security_finish_timestamp = security_finish_timestamp;
1555 manager_set_default_rlimits(m, arg_default_rlimit);
1557 if (arg_default_environment)
1558 manager_environment_add(m, NULL, arg_default_environment);
1560 manager_set_show_status(m, arg_show_status);
1562 /* Remember whether we should queue the default job */
1563 queue_default_job = !serialization || arg_switched_root;
1565 before_startup = now(CLOCK_MONOTONIC);
1567 r = manager_startup(m, serialization, fds);
1569 log_error("Failed to fully start up daemon: %s", strerror(-r));
1571 /* This will close all file descriptors that were opened, but
1572 * not claimed by any unit. */
1576 if (serialization) {
1577 fclose(serialization);
1578 serialization = NULL;
1581 if (queue_default_job) {
1582 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1583 Unit *target = NULL;
1584 Job *default_unit_job;
1586 log_debug("Activating default unit: %s", arg_default_unit);
1588 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1590 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1591 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1592 log_error("Failed to load default target: %s", strerror(-target->load_error));
1593 else if (target->load_state == UNIT_MASKED)
1594 log_error("Default target masked.");
1596 if (!target || target->load_state != UNIT_LOADED) {
1597 log_info("Trying to load rescue target...");
1599 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1601 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1603 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1604 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1606 } else if (target->load_state == UNIT_MASKED) {
1607 log_error("Rescue target masked.");
1612 assert(target->load_state == UNIT_LOADED);
1614 if (arg_action == ACTION_TEST) {
1615 printf("-> By units:\n");
1616 manager_dump_units(m, stdout, "\t");
1619 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1621 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1623 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1625 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1629 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1633 m->default_unit_job_id = default_unit_job->id;
1635 after_startup = now(CLOCK_MONOTONIC);
1636 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1637 "Loaded units and determined initial transaction in %s.",
1638 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1640 if (arg_action == ACTION_TEST) {
1641 printf("-> By jobs:\n");
1642 manager_dump_jobs(m, stdout, "\t");
1643 retval = EXIT_SUCCESS;
1649 r = manager_loop(m);
1651 log_error("Failed to run mainloop: %s", strerror(-r));
1655 switch (m->exit_code) {
1658 retval = EXIT_SUCCESS;
1662 case MANAGER_RELOAD:
1663 log_info("Reloading.");
1664 r = manager_reload(m);
1666 log_error("Failed to reload: %s", strerror(-r));
1669 case MANAGER_REEXECUTE:
1671 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1675 log_notice("Reexecuting.");
1678 case MANAGER_SWITCH_ROOT:
1679 /* Steal the switch root parameters */
1680 switch_root_dir = m->switch_root;
1681 switch_root_init = m->switch_root_init;
1682 m->switch_root = m->switch_root_init = NULL;
1684 if (!switch_root_init)
1685 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1689 log_notice("Switching root.");
1692 case MANAGER_REBOOT:
1693 case MANAGER_POWEROFF:
1695 case MANAGER_KEXEC: {
1696 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1697 [MANAGER_REBOOT] = "reboot",
1698 [MANAGER_POWEROFF] = "poweroff",
1699 [MANAGER_HALT] = "halt",
1700 [MANAGER_KEXEC] = "kexec"
1703 assert_se(shutdown_verb = table[m->exit_code]);
1704 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1706 log_notice("Shutting down.");
1711 assert_not_reached("Unknown exit code.");
1719 for (j = 0; j < RLIMIT_NLIMITS; j++)
1720 free(arg_default_rlimit[j]);
1722 free(arg_default_unit);
1723 free_join_controllers();
1729 unsigned i, args_size;
1731 /* Close and disarm the watchdog, so that the new
1732 * instance can reinitialize it, but doesn't get
1733 * rebooted while we do that */
1734 watchdog_close(true);
1736 /* Reset the RLIMIT_NOFILE to the kernel default, so
1737 * that the new systemd can pass the kernel default to
1738 * its child processes */
1739 if (saved_rlimit_nofile.rlim_cur > 0)
1740 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1742 if (switch_root_dir) {
1743 /* Kill all remaining processes from the
1744 * initrd, but don't wait for them, so that we
1745 * can handle the SIGCHLD for them after
1747 broadcast_signal(SIGTERM, false, true);
1749 /* And switch root */
1750 r = switch_root(switch_root_dir);
1752 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1755 args_size = MAX(6, argc+1);
1756 args = newa(const char*, args_size);
1758 if (!switch_root_init) {
1761 /* First try to spawn ourselves with the right
1762 * path, and with full serialization. We do
1763 * this only if the user didn't specify an
1764 * explicit init to spawn. */
1766 assert(serialization);
1769 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1773 args[i++] = SYSTEMD_BINARY_PATH;
1774 if (switch_root_dir)
1775 args[i++] = "--switched-root";
1776 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1777 args[i++] = "--deserialize";
1781 /* do not pass along the environment we inherit from the kernel or initrd */
1782 if (switch_root_dir)
1785 assert(i <= args_size);
1786 execv(args[0], (char* const*) args);
1789 /* Try the fallback, if there is any, without any
1790 * serialization. We pass the original argv[] and
1791 * envp[]. (Well, modulo the ordering changes due to
1792 * getopt() in argv[], and some cleanups in envp[],
1793 * but let's hope that doesn't matter.) */
1795 if (serialization) {
1796 fclose(serialization);
1797 serialization = NULL;
1805 /* Reopen the console */
1806 make_console_stdio();
1808 for (j = 1, i = 1; j < argc; j++)
1809 args[i++] = argv[j];
1811 assert(i <= args_size);
1813 if (switch_root_init) {
1814 args[0] = switch_root_init;
1815 execv(args[0], (char* const*) args);
1816 log_warning("Failed to execute configured init, trying fallback: %m");
1819 args[0] = "/sbin/init";
1820 execv(args[0], (char* const*) args);
1822 if (errno == ENOENT) {
1823 log_warning("No /sbin/init, trying fallback");
1825 args[0] = "/bin/sh";
1827 execv(args[0], (char* const*) args);
1828 log_error("Failed to execute /bin/sh, giving up: %m");
1830 log_warning("Failed to execute /sbin/init, giving up: %m");
1834 fclose(serialization);
1839 #ifdef HAVE_VALGRIND_VALGRIND_H
1840 /* If we are PID 1 and running under valgrind, then let's exit
1841 * here explicitly. valgrind will only generate nice output on
1842 * exit(), not on exec(), hence let's do the former not the
1844 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1848 if (shutdown_verb) {
1849 const char * command_line[] = {
1850 SYSTEMD_SHUTDOWN_BINARY_PATH,
1854 _cleanup_strv_free_ char **env_block = NULL;
1855 env_block = strv_copy(environ);
1857 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1860 /* If we reboot let's set the shutdown
1861 * watchdog and tell the shutdown binary to
1862 * repeatedly ping it */
1863 watchdog_set_timeout(&arg_shutdown_watchdog);
1864 watchdog_close(false);
1866 /* Tell the binary how often to ping, ignore failure */
1867 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
1868 strv_push(&env_block, e);
1870 watchdog_close(true);
1872 /* Avoid the creation of new processes forked by the
1873 * kernel; at this point, we will not listen to the
1875 if (detect_container(NULL) <= 0)
1876 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1878 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1879 log_error("Failed to execute shutdown binary, freezing: %m");