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 %lu.", signal_to_string(sig), (unsigned long) 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 %lu.", (unsigned long) 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(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")
466 static int config_parse_cpu_affinity2(const char *unit,
467 const char *filename,
470 unsigned section_line,
487 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
492 if (!(t = strndup(w, l)))
495 r = safe_atou(t, &cpu);
499 if (!(c = cpu_set_malloc(&ncpus)))
502 if (r < 0 || cpu >= ncpus) {
503 log_syntax(unit, LOG_ERR, filename, line, -r,
504 "Failed to parse CPU affinity '%s'", rvalue);
509 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
513 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
514 log_warning_unit(unit, "Failed to set CPU affinity: %m");
522 static void strv_free_free(char ***l) {
534 static void free_join_controllers(void) {
535 strv_free_free(arg_join_controllers);
536 arg_join_controllers = NULL;
539 static int config_parse_join_controllers(const char *unit,
540 const char *filename,
543 unsigned section_line,
558 free_join_controllers();
560 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
563 s = strndup(w, length);
567 l = strv_split(s, ",");
572 if (strv_length(l) <= 1) {
577 if (!arg_join_controllers) {
578 arg_join_controllers = new(char**, 2);
579 if (!arg_join_controllers) {
584 arg_join_controllers[0] = l;
585 arg_join_controllers[1] = NULL;
592 t = new0(char**, n+2);
600 for (a = arg_join_controllers; *a; a++) {
602 if (strv_overlap(*a, l)) {
605 c = strv_merge(*a, l);
628 t[n++] = strv_uniq(l);
630 strv_free_free(arg_join_controllers);
631 arg_join_controllers = t;
638 static int parse_config_file(void) {
640 const ConfigTableItem items[] = {
641 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
642 { "Manager", "LogTarget", config_parse_target, 0, NULL },
643 { "Manager", "LogColor", config_parse_color, 0, NULL },
644 { "Manager", "LogLocation", config_parse_location, 0, NULL },
645 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
646 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
647 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
648 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
649 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
650 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
651 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
652 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
653 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
654 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
655 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
656 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
657 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
658 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
659 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
660 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
661 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
662 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
663 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
664 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
665 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
666 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
667 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
668 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
669 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
670 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
671 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
672 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
673 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
674 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
675 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
676 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
677 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
678 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
679 { NULL, NULL, NULL, 0, NULL }
682 _cleanup_fclose_ FILE *f;
686 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
692 log_warning("Failed to open configuration file '%s': %m", fn);
696 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
698 log_warning("Failed to parse configuration file: %s", strerror(-r));
703 static int parse_proc_cmdline(void) {
704 _cleanup_free_ char *line = NULL;
709 r = proc_cmdline(&line);
711 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
715 FOREACH_WORD_QUOTED(w, l, line, state) {
716 _cleanup_free_ char *word;
718 word = strndup(w, l);
722 r = parse_proc_cmdline_word(word);
724 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
732 static int parse_argv(int argc, char *argv[]) {
735 ARG_LOG_LEVEL = 0x100,
744 ARG_DUMP_CONFIGURATION_ITEMS,
751 ARG_DEFAULT_STD_OUTPUT,
752 ARG_DEFAULT_STD_ERROR
755 static const struct option options[] = {
756 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
757 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
758 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
759 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
760 { "unit", required_argument, NULL, ARG_UNIT },
761 { "system", no_argument, NULL, ARG_SYSTEM },
762 { "user", no_argument, NULL, ARG_USER },
763 { "test", no_argument, NULL, ARG_TEST },
764 { "help", no_argument, NULL, 'h' },
765 { "version", no_argument, NULL, ARG_VERSION },
766 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
767 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
768 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
769 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
770 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
771 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
772 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
773 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
774 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
786 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
791 if ((r = log_set_max_level_from_string(optarg)) < 0) {
792 log_error("Failed to parse log level %s.", optarg);
800 if ((r = log_set_target_from_string(optarg)) < 0) {
801 log_error("Failed to parse log target %s.", optarg);
810 if ((r = log_show_color_from_string(optarg)) < 0) {
811 log_error("Failed to parse log color setting %s.", optarg);
815 log_show_color(true);
819 case ARG_LOG_LOCATION:
822 if ((r = log_show_location_from_string(optarg)) < 0) {
823 log_error("Failed to parse log location setting %s.", optarg);
827 log_show_location(true);
831 case ARG_DEFAULT_STD_OUTPUT:
833 if ((r = exec_output_from_string(optarg)) < 0) {
834 log_error("Failed to parse default standard output setting %s.", optarg);
837 arg_default_std_output = r;
840 case ARG_DEFAULT_STD_ERROR:
842 if ((r = exec_output_from_string(optarg)) < 0) {
843 log_error("Failed to parse default standard error output setting %s.", optarg);
846 arg_default_std_error = r;
851 if ((r = set_default_unit(optarg)) < 0) {
852 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
859 arg_running_as = SYSTEMD_SYSTEM;
863 arg_running_as = SYSTEMD_USER;
867 arg_action = ACTION_TEST;
871 arg_action = ACTION_VERSION;
874 case ARG_DUMP_CONFIGURATION_ITEMS:
875 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
879 r = optarg ? parse_boolean(optarg) : 1;
881 log_error("Failed to parse dump core boolean %s.", optarg);
887 case ARG_CRASH_SHELL:
888 r = optarg ? parse_boolean(optarg) : 1;
890 log_error("Failed to parse crash shell boolean %s.", optarg);
896 case ARG_CONFIRM_SPAWN:
897 r = optarg ? parse_boolean(optarg) : 1;
899 log_error("Failed to parse confirm spawn boolean %s.", optarg);
902 arg_confirm_spawn = r;
905 case ARG_SHOW_STATUS:
906 r = optarg ? parse_boolean(optarg) : 1;
908 log_error("Failed to parse show status boolean %s.", optarg);
914 case ARG_DESERIALIZE: {
918 r = safe_atoi(optarg, &fd);
919 if (r < 0 || fd < 0) {
920 log_error("Failed to parse deserialize option %s.", optarg);
921 return r < 0 ? r : -EINVAL;
924 fd_cloexec(fd, true);
928 log_error("Failed to open serialization fd: %m");
933 fclose(serialization);
940 case ARG_SWITCHED_ROOT:
941 arg_switched_root = true;
945 arg_action = ACTION_HELP;
949 log_set_max_level(LOG_DEBUG);
955 /* Just to eat away the sysvinit kernel
956 * cmdline args without getopt() error
957 * messages that we'll parse in
958 * parse_proc_cmdline_word() or ignore. */
963 log_error("Unknown option code %c", c);
970 if (optind < argc && getpid() != 1) {
971 /* Hmm, when we aren't run as init system
972 * let's complain about excess arguments */
974 log_error("Excess arguments.");
978 if (detect_container(NULL) > 0) {
981 /* All /proc/cmdline arguments the kernel didn't
982 * understand it passed to us. We're not really
983 * interested in that usually since /proc/cmdline is
984 * more interesting and complete. With one exception:
985 * if we are run in a container /proc/cmdline is not
986 * relevant for the container, hence we rely on argv[]
989 for (a = argv; a < argv + argc; a++) {
990 r = parse_proc_cmdline_word(*a);
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 " --dump-configuration-items Dump understood unit configuration items\n"
1008 " --unit=UNIT Set default unit\n"
1009 " --system Run a system instance, even if PID != 1\n"
1010 " --user Run a user instance\n"
1011 " --dump-core[=0|1] Dump core on crash\n"
1012 " --crash-shell[=0|1] Run shell on crash\n"
1013 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1014 " --show-status[=0|1] Show status updates on the console during bootup\n"
1015 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1016 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1017 " --log-color[=0|1] Highlight important log messages\n"
1018 " --log-location[=0|1] Include code location in log messages\n"
1019 " --default-standard-output= Set default standard output for services\n"
1020 " --default-standard-error= Set default standard error output for services\n",
1021 program_invocation_short_name);
1026 static int version(void) {
1027 puts(PACKAGE_STRING);
1028 puts(SYSTEMD_FEATURES);
1033 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1042 r = manager_open_serialization(m, &f);
1044 log_error("Failed to create serialization file: %s", strerror(-r));
1048 /* Make sure nothing is really destructed when we shut down */
1050 bus_manager_send_reloading(m, true);
1055 log_error("Failed to allocate fd set: %s", strerror(-r));
1059 r = manager_serialize(m, f, fds, switching_root);
1061 log_error("Failed to serialize state: %s", strerror(-r));
1065 if (fseeko(f, 0, SEEK_SET) < 0) {
1066 log_error("Failed to rewind serialization fd: %m");
1070 r = fd_cloexec(fileno(f), false);
1072 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1076 r = fdset_cloexec(fds, false);
1078 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1096 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1100 assert(saved_rlimit);
1102 /* Save the original RLIMIT_NOFILE so that we can reset it
1103 * later when transitioning from the initrd to the main
1104 * systemd or suchlike. */
1105 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1106 log_error("Reading RLIMIT_NOFILE failed: %m");
1110 /* Make sure forked processes get the default kernel setting */
1111 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1114 rl = newdup(struct rlimit, saved_rlimit, 1);
1118 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1121 /* Bump up the resource limit for ourselves substantially */
1122 nl.rlim_cur = nl.rlim_max = 64*1024;
1123 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1125 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1132 static void test_mtab(void) {
1135 /* Check that /etc/mtab is a symlink */
1137 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1140 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1147 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1148 "This is not supported anymore. "
1149 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1152 static void test_usr(void) {
1154 /* Check that /usr is not a separate fs */
1156 if (dir_is_empty("/usr") <= 0)
1159 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1160 "Some things will probably break (sometimes even silently) in mysterious ways. "
1161 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1164 static void test_cgroups(void) {
1166 if (access("/proc/cgroups", F_OK) >= 0)
1169 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1170 "Systems without control groups are not supported. "
1171 "We will now sleep for 10s, and then continue boot-up. "
1172 "Expect breakage and please do not file bugs. "
1173 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1174 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1179 static int initialize_join_controllers(void) {
1180 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1181 * + "net_prio". We'd like to add "cpuset" to the mix, but
1182 * "cpuset" does't really work for groups with no initialized
1185 arg_join_controllers = new(char**, 3);
1186 if (!arg_join_controllers)
1189 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1190 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1191 arg_join_controllers[2] = NULL;
1193 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1194 free_join_controllers();
1201 int main(int argc, char *argv[]) {
1203 int r, retval = EXIT_FAILURE;
1204 usec_t before_startup, after_startup;
1205 char timespan[FORMAT_TIMESPAN_MAX];
1207 bool reexecute = false;
1208 const char *shutdown_verb = NULL;
1209 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1210 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1211 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1212 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1213 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1214 static char systemd[] = "systemd";
1215 bool skip_setup = false;
1217 bool loaded_policy = false;
1218 bool arm_reboot_watchdog = false;
1219 bool queue_default_job = false;
1220 char *switch_root_dir = NULL, *switch_root_init = NULL;
1221 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1223 #ifdef HAVE_SYSV_COMPAT
1224 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1225 /* This is compatibility support for SysV, where
1226 * calling init as a user is identical to telinit. */
1229 execv(SYSTEMCTL_BINARY_PATH, argv);
1230 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1235 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1236 dual_timestamp_get(&userspace_timestamp);
1238 /* Determine if this is a reexecution or normal bootup. We do
1239 * the full command line parsing much later, so let's just
1240 * have a quick peek here. */
1241 if (strv_find(argv+1, "--deserialize"))
1244 /* If we have switched root, do all the special setup
1246 if (strv_find(argv+1, "--switched-root"))
1249 /* If we get started via the /sbin/init symlink then we are
1250 called 'init'. After a subsequent reexecution we are then
1251 called 'systemd'. That is confusing, hence let's call us
1252 systemd right-away. */
1253 program_invocation_short_name = systemd;
1254 prctl(PR_SET_NAME, systemd);
1259 log_show_color(isatty(STDERR_FILENO) > 0);
1261 /* Disable the umask logic */
1265 if (getpid() == 1 && detect_container(NULL) <= 0) {
1267 /* Running outside of a container as PID 1 */
1268 arg_running_as = SYSTEMD_SYSTEM;
1270 log_set_target(LOG_TARGET_KMSG);
1274 initrd_timestamp = userspace_timestamp;
1277 mount_setup_early();
1278 dual_timestamp_get(&security_start_timestamp);
1279 if (selinux_setup(&loaded_policy) < 0)
1281 if (ima_setup() < 0)
1283 if (smack_setup() < 0)
1285 dual_timestamp_get(&security_finish_timestamp);
1288 if (label_init(NULL) < 0)
1292 if (hwclock_is_localtime() > 0) {
1295 /* The first-time call to settimeofday() does a time warp in the kernel */
1296 r = hwclock_set_timezone(&min);
1298 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1300 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1301 } else if (!in_initrd()) {
1303 * Do dummy first-time call to seal the kernel's time warp magic
1305 * Do not call this this from inside the initrd. The initrd might not
1306 * carry /etc/adjtime with LOCAL, but the real system could be set up
1307 * that way. In such case, we need to delay the time-warp or the sealing
1308 * until we reach the real system.
1310 hwclock_reset_timezone();
1312 /* Tell the kernel our timezone */
1313 r = hwclock_set_timezone(NULL);
1315 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1319 /* Set the default for later on, but don't actually
1320 * open the logs like this for now. Note that if we
1321 * are transitioning from the initrd there might still
1322 * be journal fd open, and we shouldn't attempt
1323 * opening that before we parsed /proc/cmdline which
1324 * might redirect output elsewhere. */
1325 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1327 } else if (getpid() == 1) {
1328 /* Running inside a container, as PID 1 */
1329 arg_running_as = SYSTEMD_SYSTEM;
1330 log_set_target(LOG_TARGET_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())
1502 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1503 watchdog_set_timeout(&arg_runtime_watchdog);
1505 if (arg_timer_slack_nsec != (nsec_t) -1)
1506 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1507 log_error("Failed to adjust timer slack: %m");
1509 if (arg_capability_bounding_set_drop) {
1510 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1512 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1515 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1517 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1522 if (arg_running_as == SYSTEMD_USER) {
1523 /* Become reaper of our children */
1524 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1525 log_warning("Failed to make us a subreaper: %m");
1526 if (errno == EINVAL)
1527 log_info("Perhaps the kernel version is too old (< 3.4?)");
1531 if (arg_running_as == SYSTEMD_SYSTEM)
1532 bump_rlimit_nofile(&saved_rlimit_nofile);
1534 r = manager_new(arg_running_as, &m);
1536 log_error("Failed to allocate manager object: %s", strerror(-r));
1540 m->confirm_spawn = arg_confirm_spawn;
1541 m->default_std_output = arg_default_std_output;
1542 m->default_std_error = arg_default_std_error;
1543 m->default_restart_usec = arg_default_restart_usec;
1544 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1545 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1546 m->default_start_limit_interval = arg_default_start_limit_interval;
1547 m->default_start_limit_burst = arg_default_start_limit_burst;
1548 m->runtime_watchdog = arg_runtime_watchdog;
1549 m->shutdown_watchdog = arg_shutdown_watchdog;
1550 m->userspace_timestamp = userspace_timestamp;
1551 m->kernel_timestamp = kernel_timestamp;
1552 m->initrd_timestamp = initrd_timestamp;
1553 m->security_start_timestamp = security_start_timestamp;
1554 m->security_finish_timestamp = security_finish_timestamp;
1556 manager_set_default_rlimits(m, arg_default_rlimit);
1558 if (arg_default_environment)
1559 manager_environment_add(m, NULL, arg_default_environment);
1561 manager_set_show_status(m, arg_show_status);
1563 /* Remember whether we should queue the default job */
1564 queue_default_job = !serialization || arg_switched_root;
1566 before_startup = now(CLOCK_MONOTONIC);
1568 r = manager_startup(m, serialization, fds);
1570 log_error("Failed to fully start up daemon: %s", strerror(-r));
1572 /* This will close all file descriptors that were opened, but
1573 * not claimed by any unit. */
1577 if (serialization) {
1578 fclose(serialization);
1579 serialization = NULL;
1582 if (queue_default_job) {
1583 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1584 Unit *target = NULL;
1585 Job *default_unit_job;
1587 log_debug("Activating default unit: %s", arg_default_unit);
1589 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1591 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1592 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1593 log_error("Failed to load default target: %s", strerror(-target->load_error));
1594 else if (target->load_state == UNIT_MASKED)
1595 log_error("Default target masked.");
1597 if (!target || target->load_state != UNIT_LOADED) {
1598 log_info("Trying to load rescue target...");
1600 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1602 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1604 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1605 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1607 } else if (target->load_state == UNIT_MASKED) {
1608 log_error("Rescue target masked.");
1613 assert(target->load_state == UNIT_LOADED);
1615 if (arg_action == ACTION_TEST) {
1616 printf("-> By units:\n");
1617 manager_dump_units(m, stdout, "\t");
1620 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1622 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1624 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1626 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1630 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1634 m->default_unit_job_id = default_unit_job->id;
1636 after_startup = now(CLOCK_MONOTONIC);
1637 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1638 "Loaded units and determined initial transaction in %s.",
1639 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1641 if (arg_action == ACTION_TEST) {
1642 printf("-> By jobs:\n");
1643 manager_dump_jobs(m, stdout, "\t");
1644 retval = EXIT_SUCCESS;
1650 r = manager_loop(m);
1652 log_error("Failed to run mainloop: %s", strerror(-r));
1656 switch (m->exit_code) {
1659 retval = EXIT_SUCCESS;
1663 case MANAGER_RELOAD:
1664 log_info("Reloading.");
1665 r = manager_reload(m);
1667 log_error("Failed to reload: %s", strerror(-r));
1670 case MANAGER_REEXECUTE:
1672 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1676 log_notice("Reexecuting.");
1679 case MANAGER_SWITCH_ROOT:
1680 /* Steal the switch root parameters */
1681 switch_root_dir = m->switch_root;
1682 switch_root_init = m->switch_root_init;
1683 m->switch_root = m->switch_root_init = NULL;
1685 if (!switch_root_init)
1686 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1690 log_notice("Switching root.");
1693 case MANAGER_REBOOT:
1694 case MANAGER_POWEROFF:
1696 case MANAGER_KEXEC: {
1697 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1698 [MANAGER_REBOOT] = "reboot",
1699 [MANAGER_POWEROFF] = "poweroff",
1700 [MANAGER_HALT] = "halt",
1701 [MANAGER_KEXEC] = "kexec"
1704 assert_se(shutdown_verb = table[m->exit_code]);
1705 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1707 log_notice("Shutting down.");
1712 assert_not_reached("Unknown exit code.");
1720 for (j = 0; j < RLIMIT_NLIMITS; j++)
1721 free(arg_default_rlimit[j]);
1723 free(arg_default_unit);
1724 free_join_controllers();
1730 unsigned i, args_size;
1732 /* Close and disarm the watchdog, so that the new
1733 * instance can reinitialize it, but doesn't get
1734 * rebooted while we do that */
1735 watchdog_close(true);
1737 /* Reset the RLIMIT_NOFILE to the kernel default, so
1738 * that the new systemd can pass the kernel default to
1739 * its child processes */
1740 if (saved_rlimit_nofile.rlim_cur > 0)
1741 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1743 if (switch_root_dir) {
1744 /* Kill all remaining processes from the
1745 * initrd, but don't wait for them, so that we
1746 * can handle the SIGCHLD for them after
1748 broadcast_signal(SIGTERM, false, true);
1750 /* And switch root */
1751 r = switch_root(switch_root_dir);
1753 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1756 args_size = MAX(6, argc+1);
1757 args = newa(const char*, args_size);
1759 if (!switch_root_init) {
1762 /* First try to spawn ourselves with the right
1763 * path, and with full serialization. We do
1764 * this only if the user didn't specify an
1765 * explicit init to spawn. */
1767 assert(serialization);
1770 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1774 args[i++] = SYSTEMD_BINARY_PATH;
1775 if (switch_root_dir)
1776 args[i++] = "--switched-root";
1777 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1778 args[i++] = "--deserialize";
1782 /* do not pass along the environment we inherit from the kernel or initrd */
1783 if (switch_root_dir)
1786 assert(i <= args_size);
1787 execv(args[0], (char* const*) args);
1790 /* Try the fallback, if there is any, without any
1791 * serialization. We pass the original argv[] and
1792 * envp[]. (Well, modulo the ordering changes due to
1793 * getopt() in argv[], and some cleanups in envp[],
1794 * but let's hope that doesn't matter.) */
1796 if (serialization) {
1797 fclose(serialization);
1798 serialization = NULL;
1806 /* Reopen the console */
1807 make_console_stdio();
1809 for (j = 1, i = 1; j < argc; j++)
1810 args[i++] = argv[j];
1812 assert(i <= args_size);
1814 if (switch_root_init) {
1815 args[0] = switch_root_init;
1816 execv(args[0], (char* const*) args);
1817 log_warning("Failed to execute configured init, trying fallback: %m");
1820 args[0] = "/sbin/init";
1821 execv(args[0], (char* const*) args);
1823 if (errno == ENOENT) {
1824 log_warning("No /sbin/init, trying fallback");
1826 args[0] = "/bin/sh";
1828 execv(args[0], (char* const*) args);
1829 log_error("Failed to execute /bin/sh, giving up: %m");
1831 log_warning("Failed to execute /sbin/init, giving up: %m");
1835 fclose(serialization);
1840 #ifdef HAVE_VALGRIND_VALGRIND_H
1841 /* If we are PID 1 and running under valgrind, then let's exit
1842 * here explicitly. valgrind will only generate nice output on
1843 * exit(), not on exec(), hence let's do the former not the
1845 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1849 if (shutdown_verb) {
1850 const char * command_line[] = {
1851 SYSTEMD_SHUTDOWN_BINARY_PATH,
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 */
1867 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1870 env_block = strv_append(environ, e);
1872 env_block = strv_copy(environ);
1873 watchdog_close(true);
1876 /* Avoid the creation of new processes forked by the
1877 * kernel; at this point, we will not listen to the
1879 if (detect_container(NULL) <= 0)
1880 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1882 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1884 log_error("Failed to execute shutdown binary, freezing: %m");