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/>.
22 #include <dbus/dbus.h>
28 #include <sys/types.h>
34 #include <sys/prctl.h>
35 #include <sys/mount.h>
39 #include "load-fragment.h"
42 #include "conf-parser.h"
43 #include "bus-errors.h"
51 #include "path-util.h"
52 #include "switch-root.h"
53 #include "capability.h"
57 #include "sd-daemon.h"
59 #include "mount-setup.h"
60 #include "loopback-setup.h"
62 #include "kmod-setup.h"
64 #include "hostname-setup.h"
65 #include "machine-id-setup.h"
66 #include "locale-setup.h"
67 #include "selinux-setup.h"
68 #include "ima-setup.h"
70 #include "smack-setup.h"
77 ACTION_DUMP_CONFIGURATION_ITEMS,
79 } arg_action = ACTION_RUN;
81 static char *arg_default_unit = NULL;
82 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
84 static bool arg_dump_core = true;
85 static bool arg_crash_shell = false;
86 static int arg_crash_chvt = -1;
87 static bool arg_confirm_spawn = false;
88 static bool arg_show_status = true;
89 static bool arg_switched_root = false;
90 static char **arg_default_controllers = NULL;
91 static char ***arg_join_controllers = NULL;
92 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
93 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
94 static usec_t arg_runtime_watchdog = 0;
95 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
96 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
97 static uint64_t arg_capability_bounding_set_drop = 0;
98 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
100 static FILE* serialization = NULL;
102 static void nop_handler(int sig) {
105 _noreturn_ static void crash(int sig) {
108 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
110 struct sigaction sa = {
111 .sa_handler = nop_handler,
112 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
116 /* We want to wait for the core process, hence let's enable SIGCHLD */
117 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
121 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
124 struct rlimit rl = {};
126 /* Enable default signal handler for core dump */
128 sa.sa_handler = SIG_DFL;
129 assert_se(sigaction(sig, &sa, NULL) == 0);
131 /* Don't limit the core dump size */
132 rl.rlim_cur = RLIM_INFINITY;
133 rl.rlim_max = RLIM_INFINITY;
134 setrlimit(RLIMIT_CORE, &rl);
136 /* Just to be sure... */
137 assert_se(chdir("/") == 0);
139 /* Raise the signal again */
142 assert_not_reached("We shouldn't be here...");
149 /* Order things nicely. */
150 r = wait_for_terminate(pid, &status);
152 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
153 else if (status.si_code != CLD_DUMPED)
154 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
156 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
161 chvt(arg_crash_chvt);
163 if (arg_crash_shell) {
164 struct sigaction sa = {
165 .sa_handler = SIG_IGN,
166 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
170 log_info("Executing crash shell in 10s...");
173 /* Let the kernel reap children for us */
174 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
178 log_error("Failed to fork off crash shell: %m");
180 make_console_stdio();
181 execl("/bin/sh", "/bin/sh", NULL);
183 log_error("execl() failed: %m");
187 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
190 log_info("Freezing execution.");
194 static void install_crash_handler(void) {
195 struct sigaction sa = {
197 .sa_flags = SA_NODEFER,
200 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
203 static int console_setup(bool do_reset) {
206 /* If we are init, we connect stdin/stdout/stderr to /dev/null
207 * and make sure we don't have a controlling tty. */
214 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
216 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
220 /* We don't want to force text mode.
221 * plymouth may be showing pictures already from initrd. */
222 r = reset_terminal_fd(tty_fd, false);
224 log_error("Failed to reset /dev/console: %s", strerror(-r));
226 close_nointr_nofail(tty_fd);
230 static int set_default_unit(const char *u) {
239 free(arg_default_unit);
240 arg_default_unit = c;
245 static int parse_proc_cmdline_word(const char *word) {
247 static const char * const rlmap[] = {
248 "emergency", SPECIAL_EMERGENCY_TARGET,
249 "-b", SPECIAL_EMERGENCY_TARGET,
250 "single", SPECIAL_RESCUE_TARGET,
251 "-s", SPECIAL_RESCUE_TARGET,
252 "s", SPECIAL_RESCUE_TARGET,
253 "S", SPECIAL_RESCUE_TARGET,
254 "1", SPECIAL_RESCUE_TARGET,
255 "2", SPECIAL_RUNLEVEL2_TARGET,
256 "3", SPECIAL_RUNLEVEL3_TARGET,
257 "4", SPECIAL_RUNLEVEL4_TARGET,
258 "5", SPECIAL_RUNLEVEL5_TARGET,
263 if (startswith(word, "systemd.unit=")) {
266 return set_default_unit(word + 13);
268 } else if (startswith(word, "rd.systemd.unit=")) {
271 return set_default_unit(word + 16);
273 } else if (startswith(word, "systemd.log_target=")) {
275 if (log_set_target_from_string(word + 19) < 0)
276 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
278 } else if (startswith(word, "systemd.log_level=")) {
280 if (log_set_max_level_from_string(word + 18) < 0)
281 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
283 } else if (startswith(word, "systemd.log_color=")) {
285 if (log_show_color_from_string(word + 18) < 0)
286 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
288 } else if (startswith(word, "systemd.log_location=")) {
290 if (log_show_location_from_string(word + 21) < 0)
291 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
293 } else if (startswith(word, "systemd.dump_core=")) {
296 if ((r = parse_boolean(word + 18)) < 0)
297 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
301 } else if (startswith(word, "systemd.crash_shell=")) {
304 if ((r = parse_boolean(word + 20)) < 0)
305 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
309 } else if (startswith(word, "systemd.confirm_spawn=")) {
312 if ((r = parse_boolean(word + 22)) < 0)
313 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
315 arg_confirm_spawn = r;
317 } else if (startswith(word, "systemd.crash_chvt=")) {
320 if (safe_atoi(word + 19, &k) < 0)
321 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
325 } else if (startswith(word, "systemd.show_status=")) {
328 if ((r = parse_boolean(word + 20)) < 0)
329 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
332 } else if (startswith(word, "systemd.default_standard_output=")) {
335 if ((r = exec_output_from_string(word + 32)) < 0)
336 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
338 arg_default_std_output = r;
339 } else if (startswith(word, "systemd.default_standard_error=")) {
342 if ((r = exec_output_from_string(word + 31)) < 0)
343 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
345 arg_default_std_error = r;
346 } else if (startswith(word, "systemd.setenv=")) {
347 _cleanup_free_ char *cenv = NULL;
351 cenv = strdup(word + 15);
355 eq = strchr(cenv, '=');
357 if (!env_name_is_valid(cenv))
358 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
362 log_warning("Unsetting environment variable '%s' failed, ignoring: %m", cenv);
365 if (!env_assignment_is_valid(cenv))
366 log_warning("Environment variable assignment '%s' is not valid. Ignoring.", cenv);
369 r = setenv(cenv, eq + 1, 1);
371 log_warning("Setting environment variable '%s=%s' failed, ignoring: %m", cenv, eq + 1);
375 } else if (startswith(word, "systemd.") ||
376 (in_initrd() && startswith(word, "rd.systemd."))) {
380 /* Ignore systemd.journald.xyz and friends */
382 if (startswith(c, "rd."))
384 if (startswith(c, "systemd."))
386 if (c[strcspn(c, ".=")] != '.') {
388 log_warning("Unknown kernel switch %s. Ignoring.", word);
390 log_info("Supported kernel switches:\n"
391 "systemd.unit=UNIT Default unit to start\n"
392 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
393 "systemd.dump_core=0|1 Dump core on crash\n"
394 "systemd.crash_shell=0|1 Run shell on crash\n"
395 "systemd.crash_chvt=N Change to VT #N on crash\n"
396 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
397 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
398 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
400 "systemd.log_level=LEVEL Log level\n"
401 "systemd.log_color=0|1 Highlight important log messages\n"
402 "systemd.log_location=0|1 Include code location in log messages\n"
403 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
404 " Set default log output for services\n"
405 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
406 " Set default log error output for services\n"
407 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
410 } else if (streq(word, "quiet"))
411 arg_show_status = false;
412 else if (!in_initrd()) {
415 /* SysV compatibility */
416 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
417 if (streq(word, rlmap[i]))
418 return set_default_unit(rlmap[i+1]);
424 static int config_parse_level2(
425 const char *filename,
438 log_set_max_level_from_string(rvalue);
442 static int config_parse_target(
443 const char *filename,
456 log_set_target_from_string(rvalue);
460 static int config_parse_color(
461 const char *filename,
474 log_show_color_from_string(rvalue);
478 static int config_parse_location(
479 const char *filename,
492 log_show_location_from_string(rvalue);
496 static int config_parse_cpu_affinity2(
497 const char *filename,
516 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
521 if (!(t = strndup(w, l)))
524 r = safe_atou(t, &cpu);
528 if (!(c = cpu_set_malloc(&ncpus)))
531 if (r < 0 || cpu >= ncpus) {
532 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
537 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
541 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
542 log_warning("Failed to set CPU affinity: %m");
550 static void strv_free_free(char ***l) {
562 static void free_join_controllers(void) {
563 if (!arg_join_controllers)
566 strv_free_free(arg_join_controllers);
567 arg_join_controllers = NULL;
570 static int config_parse_join_controllers(
571 const char *filename,
588 free_join_controllers();
590 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
593 s = strndup(w, length);
597 l = strv_split(s, ",");
602 if (strv_length(l) <= 1) {
607 if (!arg_join_controllers) {
608 arg_join_controllers = new(char**, 2);
609 if (!arg_join_controllers) {
614 arg_join_controllers[0] = l;
615 arg_join_controllers[1] = NULL;
622 t = new0(char**, n+2);
630 for (a = arg_join_controllers; *a; a++) {
632 if (strv_overlap(*a, l)) {
635 c = strv_merge(*a, l);
658 t[n++] = strv_uniq(l);
660 strv_free_free(arg_join_controllers);
661 arg_join_controllers = t;
668 static int parse_config_file(void) {
670 const ConfigTableItem items[] = {
671 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
672 { "Manager", "LogTarget", config_parse_target, 0, NULL },
673 { "Manager", "LogColor", config_parse_color, 0, NULL },
674 { "Manager", "LogLocation", config_parse_location, 0, NULL },
675 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
676 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
677 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
678 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
679 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
680 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
681 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
682 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
683 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
684 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
685 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
686 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
687 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
688 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
689 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
690 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
691 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
692 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
693 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
694 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
695 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
696 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
697 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
698 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
699 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
700 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
701 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
702 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
703 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
704 { NULL, NULL, NULL, 0, NULL }
707 FILE _cleanup_fclose_ *f;
711 fn = arg_running_as == SYSTEMD_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
717 log_warning("Failed to open configuration file '%s': %m", fn);
721 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
723 log_warning("Failed to parse configuration file: %s", strerror(-r));
728 static int parse_proc_cmdline(void) {
729 char *line, *w, *state;
733 /* Don't read /proc/cmdline if we are in a container, since
734 * that is only relevant for the host system */
735 if (detect_container(NULL) > 0)
738 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
739 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
743 FOREACH_WORD_QUOTED(w, l, line, state) {
746 if (!(word = strndup(w, l))) {
751 r = parse_proc_cmdline_word(word);
753 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
768 static int parse_argv(int argc, char *argv[]) {
771 ARG_LOG_LEVEL = 0x100,
780 ARG_DUMP_CONFIGURATION_ITEMS,
788 ARG_DEFAULT_STD_OUTPUT,
789 ARG_DEFAULT_STD_ERROR
792 static const struct option options[] = {
793 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
794 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
795 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
796 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
797 { "unit", required_argument, NULL, ARG_UNIT },
798 { "system", no_argument, NULL, ARG_SYSTEM },
799 { "user", no_argument, NULL, ARG_USER },
800 { "test", no_argument, NULL, ARG_TEST },
801 { "help", no_argument, NULL, 'h' },
802 { "version", no_argument, NULL, ARG_VERSION },
803 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
804 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
805 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
806 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
807 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
808 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
809 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
810 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
811 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
812 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
824 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
829 if ((r = log_set_max_level_from_string(optarg)) < 0) {
830 log_error("Failed to parse log level %s.", optarg);
838 if ((r = log_set_target_from_string(optarg)) < 0) {
839 log_error("Failed to parse log target %s.", optarg);
848 if ((r = log_show_color_from_string(optarg)) < 0) {
849 log_error("Failed to parse log color setting %s.", optarg);
853 log_show_color(true);
857 case ARG_LOG_LOCATION:
860 if ((r = log_show_location_from_string(optarg)) < 0) {
861 log_error("Failed to parse log location setting %s.", optarg);
865 log_show_location(true);
869 case ARG_DEFAULT_STD_OUTPUT:
871 if ((r = exec_output_from_string(optarg)) < 0) {
872 log_error("Failed to parse default standard output setting %s.", optarg);
875 arg_default_std_output = r;
878 case ARG_DEFAULT_STD_ERROR:
880 if ((r = exec_output_from_string(optarg)) < 0) {
881 log_error("Failed to parse default standard error output setting %s.", optarg);
884 arg_default_std_error = r;
889 if ((r = set_default_unit(optarg)) < 0) {
890 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
897 arg_running_as = SYSTEMD_SYSTEM;
901 arg_running_as = SYSTEMD_USER;
905 arg_action = ACTION_TEST;
909 arg_action = ACTION_VERSION;
912 case ARG_DUMP_CONFIGURATION_ITEMS:
913 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
917 r = optarg ? parse_boolean(optarg) : 1;
919 log_error("Failed to parse dump core boolean %s.", optarg);
925 case ARG_CRASH_SHELL:
926 r = optarg ? parse_boolean(optarg) : 1;
928 log_error("Failed to parse crash shell boolean %s.", optarg);
934 case ARG_CONFIRM_SPAWN:
935 r = optarg ? parse_boolean(optarg) : 1;
937 log_error("Failed to parse confirm spawn boolean %s.", optarg);
940 arg_confirm_spawn = r;
943 case ARG_SHOW_STATUS:
944 r = optarg ? parse_boolean(optarg) : 1;
946 log_error("Failed to parse show status boolean %s.", optarg);
952 case ARG_DESERIALIZE: {
956 r = safe_atoi(optarg, &fd);
957 if (r < 0 || fd < 0) {
958 log_error("Failed to parse deserialize option %s.", optarg);
959 return r < 0 ? r : -EINVAL;
962 fd_cloexec(fd, true);
966 log_error("Failed to open serialization fd: %m");
971 fclose(serialization);
978 case ARG_SWITCHED_ROOT:
979 arg_switched_root = true;
982 case ARG_INTROSPECT: {
983 const char * const * i = NULL;
985 for (i = bus_interface_table; *i; i += 2)
986 if (!optarg || streq(i[0], optarg)) {
987 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
990 fputs("</node>\n", stdout);
997 log_error("Unknown interface %s.", optarg);
999 arg_action = ACTION_DONE;
1004 arg_action = ACTION_HELP;
1008 log_set_max_level(LOG_DEBUG);
1014 /* Just to eat away the sysvinit kernel
1015 * cmdline args without getopt() error
1016 * messages that we'll parse in
1017 * parse_proc_cmdline_word() or ignore. */
1021 if (getpid() != 1) {
1022 log_error("Unknown option code %c", c);
1029 if (optind < argc && getpid() != 1) {
1030 /* Hmm, when we aren't run as init system
1031 * let's complain about excess arguments */
1033 log_error("Excess arguments.");
1037 if (detect_container(NULL) > 0) {
1040 /* All /proc/cmdline arguments the kernel didn't
1041 * understand it passed to us. We're not really
1042 * interested in that usually since /proc/cmdline is
1043 * more interesting and complete. With one exception:
1044 * if we are run in a container /proc/cmdline is not
1045 * relevant for the container, hence we rely on argv[]
1048 for (a = argv; a < argv + argc; a++)
1049 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1050 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1058 static int help(void) {
1060 printf("%s [OPTIONS...]\n\n"
1061 "Starts up and maintains the system or user services.\n\n"
1062 " -h --help Show this help\n"
1063 " --test Determine startup sequence, dump it and exit\n"
1064 " --dump-configuration-items Dump understood unit configuration items\n"
1065 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1066 " --unit=UNIT Set default unit\n"
1067 " --system Run a system instance, even if PID != 1\n"
1068 " --user Run a user instance\n"
1069 " --dump-core[=0|1] Dump core on crash\n"
1070 " --crash-shell[=0|1] Run shell on crash\n"
1071 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1072 " --show-status[=0|1] Show status updates on the console during bootup\n"
1073 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1074 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1075 " --log-color[=0|1] Highlight important log messages\n"
1076 " --log-location[=0|1] Include code location in log messages\n"
1077 " --default-standard-output= Set default standard output for services\n"
1078 " --default-standard-error= Set default standard error output for services\n",
1079 program_invocation_short_name);
1084 static int version(void) {
1085 puts(PACKAGE_STRING);
1086 puts(SYSTEMD_FEATURES);
1091 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1100 /* Make sure nothing is really destructed when we shut down */
1103 r = manager_open_serialization(m, &f);
1105 log_error("Failed to create serialization file: %s", strerror(-r));
1112 log_error("Failed to allocate fd set: %s", strerror(-r));
1116 r = manager_serialize(m, f, fds, switching_root);
1118 log_error("Failed to serialize state: %s", strerror(-r));
1122 if (fseeko(f, 0, SEEK_SET) < 0) {
1123 log_error("Failed to rewind serialization fd: %m");
1127 r = fd_cloexec(fileno(f), false);
1129 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1133 r = fdset_cloexec(fds, false);
1135 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1153 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1157 assert(saved_rlimit);
1159 /* Save the original RLIMIT_NOFILE so that we can reset it
1160 * later when transitioning from the initrd to the main
1161 * systemd or suchlike. */
1162 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1163 log_error("Reading RLIMIT_NOFILE failed: %m");
1167 /* Make sure forked processes get the default kernel setting */
1168 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1171 rl = newdup(struct rlimit, saved_rlimit, 1);
1175 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1178 /* Bump up the resource limit for ourselves substantially */
1179 nl.rlim_cur = nl.rlim_max = 64*1024;
1180 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1182 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1189 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1191 unsigned long long a, b;
1195 e = getenv("RD_TIMESTAMP");
1199 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1202 t->realtime = (usec_t) a;
1203 t->monotonic = (usec_t) b;
1208 static void test_mtab(void) {
1211 /* Check that /etc/mtab is a symlink */
1213 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1216 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1223 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1224 "This is not supported anymore. "
1225 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1228 static void test_usr(void) {
1230 /* Check that /usr is not a separate fs */
1232 if (dir_is_empty("/usr") <= 0)
1235 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1236 "Some things will probably break (sometimes even silently) in mysterious ways. "
1237 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1240 static void test_cgroups(void) {
1242 if (access("/proc/cgroups", F_OK) >= 0)
1245 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1246 "Systems without control groups are not supported. "
1247 "We will now sleep for 10s, and then continue boot-up. "
1248 "Expect breakage and please do not file bugs. "
1249 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1250 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1255 static int initialize_join_controllers(void) {
1256 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1257 * + "net_prio". We'd like to add "cpuset" to the mix, but
1258 * "cpuset" does't really work for groups with no initialized
1261 arg_join_controllers = new(char**, 3);
1262 if (!arg_join_controllers)
1265 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1266 if (!arg_join_controllers[0])
1269 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1270 if (!arg_join_controllers[1])
1273 arg_join_controllers[2] = NULL;
1277 int main(int argc, char *argv[]) {
1279 int r, retval = EXIT_FAILURE;
1280 usec_t before_startup, after_startup;
1281 char timespan[FORMAT_TIMESPAN_MAX];
1283 bool reexecute = false;
1284 const char *shutdown_verb = NULL;
1285 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1286 static char systemd[] = "systemd";
1287 bool skip_setup = false;
1289 bool loaded_policy = false;
1290 bool arm_reboot_watchdog = false;
1291 bool queue_default_job = false;
1292 char *switch_root_dir = NULL, *switch_root_init = NULL;
1293 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1295 #ifdef HAVE_SYSV_COMPAT
1296 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1297 /* This is compatibility support for SysV, where
1298 * calling init as a user is identical to telinit. */
1301 execv(SYSTEMCTL_BINARY_PATH, argv);
1302 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1307 /* Determine if this is a reexecution or normal bootup. We do
1308 * the full command line parsing much later, so let's just
1309 * have a quick peek here. */
1310 if (strv_find(argv+1, "--deserialize"))
1313 /* If we have switched root, do all the special setup
1315 if (strv_find(argv+1, "--switched-root"))
1318 /* If we get started via the /sbin/init symlink then we are
1319 called 'init'. After a subsequent reexecution we are then
1320 called 'systemd'. That is confusing, hence let's call us
1321 systemd right-away. */
1322 program_invocation_short_name = systemd;
1323 prctl(PR_SET_NAME, systemd);
1328 log_show_color(isatty(STDERR_FILENO) > 0);
1330 if (getpid() == 1 && detect_container(NULL) <= 0) {
1332 /* Running outside of a container as PID 1 */
1333 arg_running_as = SYSTEMD_SYSTEM;
1335 log_set_target(LOG_TARGET_KMSG);
1339 char *rd_timestamp = NULL;
1341 dual_timestamp_get(&initrd_timestamp);
1342 asprintf(&rd_timestamp, "%llu %llu",
1343 (unsigned long long) initrd_timestamp.realtime,
1344 (unsigned long long) initrd_timestamp.monotonic);
1346 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1352 mount_setup_early();
1353 if (selinux_setup(&loaded_policy) < 0)
1355 if (ima_setup() < 0)
1357 if (smack_setup() < 0)
1361 if (label_init(NULL) < 0)
1365 if (hwclock_is_localtime() > 0) {
1368 /* The first-time call to settimeofday() does a time warp in the kernel */
1369 r = hwclock_set_timezone(&min);
1371 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1373 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1374 } else if (!in_initrd()) {
1376 * Do dummy first-time call to seal the kernel's time warp magic
1378 * Do not call this this from inside the initrd. The initrd might not
1379 * carry /etc/adjtime with LOCAL, but the real system could be set up
1380 * that way. In such case, we need to delay the time-warp or the sealing
1381 * until we reach the real system.
1383 hwclock_reset_timezone();
1385 /* Tell the kernel our time zone */
1386 r = hwclock_set_timezone(NULL);
1388 log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
1392 /* Set the default for later on, but don't actually
1393 * open the logs like this for now. Note that if we
1394 * are transitioning from the initrd there might still
1395 * be journal fd open, and we shouldn't attempt
1396 * opening that before we parsed /proc/cmdline which
1397 * might redirect output elsewhere. */
1398 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1400 } else if (getpid() == 1) {
1402 /* Running inside a container, as PID 1 */
1403 arg_running_as = SYSTEMD_SYSTEM;
1404 log_set_target(LOG_TARGET_CONSOLE);
1407 /* For the later on, see above... */
1408 log_set_target(LOG_TARGET_JOURNAL);
1412 /* Running as user instance */
1413 arg_running_as = SYSTEMD_USER;
1414 log_set_target(LOG_TARGET_AUTO);
1418 /* Initialize default unit */
1419 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1421 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1425 r = initialize_join_controllers();
1429 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1430 * /proc/$PID/fd is available. */
1431 if (getpid() == 1) {
1432 r = mount_setup(loaded_policy);
1437 /* Reset all signal handlers. */
1438 assert_se(reset_all_signal_handlers() == 0);
1440 /* If we are init, we can block sigkill. Yay. */
1441 ignore_signals(SIGNALS_IGNORE, -1);
1443 if (parse_config_file() < 0)
1446 if (arg_running_as == SYSTEMD_SYSTEM)
1447 if (parse_proc_cmdline() < 0)
1450 log_parse_environment();
1452 if (parse_argv(argc, argv) < 0)
1455 if (arg_action == ACTION_TEST &&
1457 log_error("Don't run test mode as root.");
1461 if (arg_running_as == SYSTEMD_USER &&
1462 arg_action == ACTION_RUN &&
1464 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1468 if (arg_running_as == SYSTEMD_SYSTEM &&
1469 arg_action == ACTION_RUN &&
1470 running_in_chroot() > 0) {
1471 log_error("Cannot be run in a chroot() environment.");
1475 if (arg_action == ACTION_HELP) {
1478 } else if (arg_action == ACTION_VERSION) {
1481 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1482 unit_dump_config_items(stdout);
1483 retval = EXIT_SUCCESS;
1485 } else if (arg_action == ACTION_DONE) {
1486 retval = EXIT_SUCCESS;
1490 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1492 /* Close logging fds, in order not to confuse fdset below */
1495 /* Remember open file descriptors for later deserialization */
1496 r = fdset_new_fill(&fds);
1498 log_error("Failed to allocate fd set: %s", strerror(-r));
1501 fdset_cloexec(fds, true);
1504 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1506 /* Set up PATH unless it is already set */
1508 #ifdef HAVE_SPLIT_USR
1509 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1511 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1513 arg_running_as == SYSTEMD_SYSTEM);
1515 if (arg_running_as == SYSTEMD_SYSTEM) {
1516 /* Parse the data passed to us. We leave this
1517 * variables set, but the manager later on will not
1518 * pass them on to our children. */
1520 parse_initrd_timestamp(&initrd_timestamp);
1522 /* Unset some environment variables passed in from the
1523 * kernel that don't really make sense for us. */
1527 /* When we are invoked by a shell, these might be set,
1528 * but make little sense to pass on */
1533 /* When we are invoked by a chroot-like tool such as
1534 * nspawn, these might be set, but make little sense
1537 unsetenv("LOGNAME");
1539 /* We suppress the socket activation env vars, as
1540 * we'll try to match *any* open fd to units if
1542 unsetenv("LISTEN_FDS");
1543 unsetenv("LISTEN_PID");
1545 /* All other variables are left as is, so that clients
1546 * can still read them via /proc/1/environ */
1549 /* Move out of the way, so that we won't block unmounts */
1550 assert_se(chdir("/") == 0);
1552 if (arg_running_as == SYSTEMD_SYSTEM) {
1553 /* Become a session leader if we aren't one yet. */
1556 /* Disable the umask logic */
1560 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1561 dbus_connection_set_change_sigpipe(FALSE);
1563 /* Reset the console, but only if this is really init and we
1564 * are freshly booted */
1565 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1566 console_setup(getpid() == 1 && !skip_setup);
1568 /* Open the logging devices, if possible and necessary */
1571 /* Make sure we leave a core dump without panicing the
1573 if (getpid() == 1) {
1574 install_crash_handler();
1576 r = mount_cgroup_controllers(arg_join_controllers);
1581 if (arg_running_as == SYSTEMD_SYSTEM) {
1582 const char *virtualization = NULL;
1584 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1586 detect_virtualization(&virtualization);
1588 log_info("Detected virtualization '%s'.", virtualization);
1591 log_info("Running in initial RAM disk.");
1594 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1596 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1599 if (arg_show_status || plymouth_running())
1614 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1615 watchdog_set_timeout(&arg_runtime_watchdog);
1617 if (arg_timer_slack_nsec != (nsec_t) -1)
1618 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1619 log_error("Failed to adjust timer slack: %m");
1621 if (arg_capability_bounding_set_drop) {
1622 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1624 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1627 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1629 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1634 if (arg_running_as == SYSTEMD_USER) {
1635 /* Become reaper of our children */
1636 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1637 log_warning("Failed to make us a subreaper: %m");
1638 if (errno == EINVAL)
1639 log_info("Perhaps the kernel version is too old (< 3.4?)");
1643 if (arg_running_as == SYSTEMD_SYSTEM)
1644 bump_rlimit_nofile(&saved_rlimit_nofile);
1646 r = manager_new(arg_running_as, &m);
1648 log_error("Failed to allocate manager object: %s", strerror(-r));
1652 m->confirm_spawn = arg_confirm_spawn;
1653 m->default_std_output = arg_default_std_output;
1654 m->default_std_error = arg_default_std_error;
1655 m->runtime_watchdog = arg_runtime_watchdog;
1656 m->shutdown_watchdog = arg_shutdown_watchdog;
1658 manager_set_default_rlimits(m, arg_default_rlimit);
1660 if (dual_timestamp_is_set(&initrd_timestamp))
1661 m->initrd_timestamp = initrd_timestamp;
1663 if (arg_default_controllers)
1664 manager_set_default_controllers(m, arg_default_controllers);
1666 manager_set_show_status(m, arg_show_status);
1668 /* Remember whether we should queue the default job */
1669 queue_default_job = !serialization || arg_switched_root;
1671 before_startup = now(CLOCK_MONOTONIC);
1673 r = manager_startup(m, serialization, fds);
1675 log_error("Failed to fully start up daemon: %s", strerror(-r));
1677 /* This will close all file descriptors that were opened, but
1678 * not claimed by any unit. */
1681 if (serialization) {
1682 fclose(serialization);
1683 serialization = NULL;
1686 if (queue_default_job) {
1688 Unit *target = NULL;
1689 Job *default_unit_job;
1691 dbus_error_init(&error);
1693 log_debug("Activating default unit: %s", arg_default_unit);
1695 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1697 log_error("Failed to load default target: %s", bus_error(&error, r));
1698 dbus_error_free(&error);
1699 } else if (target->load_state == UNIT_ERROR)
1700 log_error("Failed to load default target: %s", strerror(-target->load_error));
1701 else if (target->load_state == UNIT_MASKED)
1702 log_error("Default target masked.");
1704 if (!target || target->load_state != UNIT_LOADED) {
1705 log_info("Trying to load rescue target...");
1707 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1709 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1710 dbus_error_free(&error);
1712 } else if (target->load_state == UNIT_ERROR) {
1713 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1715 } else if (target->load_state == UNIT_MASKED) {
1716 log_error("Rescue target masked.");
1721 assert(target->load_state == UNIT_LOADED);
1723 if (arg_action == ACTION_TEST) {
1724 printf("-> By units:\n");
1725 manager_dump_units(m, stdout, "\t");
1728 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1730 log_error("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1731 dbus_error_free(&error);
1733 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1735 log_error("Failed to start default target: %s", bus_error(&error, r));
1736 dbus_error_free(&error);
1740 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1741 dbus_error_free(&error);
1745 m->default_unit_job_id = default_unit_job->id;
1747 after_startup = now(CLOCK_MONOTONIC);
1748 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1749 "Loaded units and determined initial transaction in %s.",
1750 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1752 if (arg_action == ACTION_TEST) {
1753 printf("-> By jobs:\n");
1754 manager_dump_jobs(m, stdout, "\t");
1755 retval = EXIT_SUCCESS;
1761 r = manager_loop(m);
1763 log_error("Failed to run mainloop: %s", strerror(-r));
1767 switch (m->exit_code) {
1770 retval = EXIT_SUCCESS;
1774 case MANAGER_RELOAD:
1775 log_info("Reloading.");
1776 r = manager_reload(m);
1778 log_error("Failed to reload: %s", strerror(-r));
1781 case MANAGER_REEXECUTE:
1783 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1787 log_notice("Reexecuting.");
1790 case MANAGER_SWITCH_ROOT:
1791 /* Steal the switch root parameters */
1792 switch_root_dir = m->switch_root;
1793 switch_root_init = m->switch_root_init;
1794 m->switch_root = m->switch_root_init = NULL;
1796 if (!switch_root_init)
1797 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1801 log_notice("Switching root.");
1804 case MANAGER_REBOOT:
1805 case MANAGER_POWEROFF:
1807 case MANAGER_KEXEC: {
1808 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1809 [MANAGER_REBOOT] = "reboot",
1810 [MANAGER_POWEROFF] = "poweroff",
1811 [MANAGER_HALT] = "halt",
1812 [MANAGER_KEXEC] = "kexec"
1815 assert_se(shutdown_verb = table[m->exit_code]);
1816 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1818 log_notice("Shutting down.");
1823 assert_not_reached("Unknown exit code.");
1831 for (j = 0; j < RLIMIT_NLIMITS; j++)
1832 free(arg_default_rlimit[j]);
1834 free(arg_default_unit);
1835 strv_free(arg_default_controllers);
1836 free_join_controllers();
1843 unsigned i, args_size;
1845 /* Close and disarm the watchdog, so that the new
1846 * instance can reinitialize it, but doesn't get
1847 * rebooted while we do that */
1848 watchdog_close(true);
1850 /* Reset the RLIMIT_NOFILE to the kernel default, so
1851 * that the new systemd can pass the kernel default to
1852 * its child processes */
1853 if (saved_rlimit_nofile.rlim_cur > 0)
1854 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1856 if (switch_root_dir) {
1857 /* Kill all remaining processes from the
1858 * initrd, but don't wait for them, so that we
1859 * can handle the SIGCHLD for them after
1861 broadcast_signal(SIGTERM, false);
1863 /* And switch root */
1864 r = switch_root(switch_root_dir);
1866 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1869 args_size = MAX(6, argc+1);
1870 args = newa(const char*, args_size);
1872 if (!switch_root_init) {
1875 /* First try to spawn ourselves with the right
1876 * path, and with full serialization. We do
1877 * this only if the user didn't specify an
1878 * explicit init to spawn. */
1880 assert(serialization);
1883 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1887 args[i++] = SYSTEMD_BINARY_PATH;
1888 if (switch_root_dir)
1889 args[i++] = "--switched-root";
1890 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1891 args[i++] = "--deserialize";
1895 assert(i <= args_size);
1896 execv(args[0], (char* const*) args);
1899 /* Try the fallback, if there is any, without any
1900 * serialization. We pass the original argv[] and
1901 * envp[]. (Well, modulo the ordering changes due to
1902 * getopt() in argv[], and some cleanups in envp[],
1903 * but let's hope that doesn't matter.) */
1905 if (serialization) {
1906 fclose(serialization);
1907 serialization = NULL;
1915 /* Reopen the console */
1916 make_console_stdio();
1918 for (j = 1, i = 1; j < argc; j++)
1919 args[i++] = argv[j];
1921 assert(i <= args_size);
1923 if (switch_root_init) {
1924 args[0] = switch_root_init;
1925 execv(args[0], (char* const*) args);
1926 log_warning("Failed to execute configured init, trying fallback: %m");
1929 args[0] = "/sbin/init";
1930 execv(args[0], (char* const*) args);
1932 if (errno == ENOENT) {
1933 log_warning("No /sbin/init, trying fallback");
1935 args[0] = "/bin/sh";
1937 execv(args[0], (char* const*) args);
1938 log_error("Failed to execute /bin/sh, giving up: %m");
1940 log_warning("Failed to execute /sbin/init, giving up: %m");
1944 fclose(serialization);
1949 if (shutdown_verb) {
1950 const char * command_line[] = {
1951 SYSTEMD_SHUTDOWN_BINARY_PATH,
1957 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1960 /* If we reboot let's set the shutdown
1961 * watchdog and tell the shutdown binary to
1962 * repeatedly ping it */
1963 watchdog_set_timeout(&arg_shutdown_watchdog);
1964 watchdog_close(false);
1966 /* Tell the binary how often to ping */
1967 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1970 env_block = strv_append(environ, e);
1972 env_block = strv_copy(environ);
1973 watchdog_close(true);
1976 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1978 log_error("Failed to execute shutdown binary, freezing: %m");