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"
58 #include "sd-messages.h"
60 #include "mount-setup.h"
61 #include "loopback-setup.h"
63 #include "kmod-setup.h"
65 #include "hostname-setup.h"
66 #include "machine-id-setup.h"
67 #include "locale-setup.h"
68 #include "selinux-setup.h"
69 #include "ima-setup.h"
71 #include "smack-setup.h"
78 ACTION_DUMP_CONFIGURATION_ITEMS,
80 } arg_action = ACTION_RUN;
82 static char *arg_default_unit = NULL;
83 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
85 static bool arg_dump_core = true;
86 static bool arg_crash_shell = false;
87 static int arg_crash_chvt = -1;
88 static bool arg_confirm_spawn = false;
89 static bool arg_show_status = true;
90 static bool arg_switched_root = false;
91 static char **arg_default_controllers = NULL;
92 static char ***arg_join_controllers = NULL;
93 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
94 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
95 static usec_t arg_runtime_watchdog = 0;
96 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
97 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
98 static uint64_t arg_capability_bounding_set_drop = 0;
99 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
101 static FILE* serialization = NULL;
103 static void nop_handler(int sig) {
106 _noreturn_ static void crash(int sig) {
109 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
111 struct sigaction sa = {
112 .sa_handler = nop_handler,
113 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
117 /* We want to wait for the core process, hence let's enable SIGCHLD */
118 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
122 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
125 struct rlimit rl = {};
127 /* Enable default signal handler for core dump */
129 sa.sa_handler = SIG_DFL;
130 assert_se(sigaction(sig, &sa, NULL) == 0);
132 /* Don't limit the core dump size */
133 rl.rlim_cur = RLIM_INFINITY;
134 rl.rlim_max = RLIM_INFINITY;
135 setrlimit(RLIMIT_CORE, &rl);
137 /* Just to be sure... */
138 assert_se(chdir("/") == 0);
140 /* Raise the signal again */
143 assert_not_reached("We shouldn't be here...");
150 /* Order things nicely. */
151 r = wait_for_terminate(pid, &status);
153 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
154 else if (status.si_code != CLD_DUMPED)
155 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
157 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
162 chvt(arg_crash_chvt);
164 if (arg_crash_shell) {
165 struct sigaction sa = {
166 .sa_handler = SIG_IGN,
167 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
171 log_info("Executing crash shell in 10s...");
174 /* Let the kernel reap children for us */
175 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
179 log_error("Failed to fork off crash shell: %m");
181 make_console_stdio();
182 execl("/bin/sh", "/bin/sh", NULL);
184 log_error("execl() failed: %m");
188 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
191 log_info("Freezing execution.");
195 static void install_crash_handler(void) {
196 struct sigaction sa = {
198 .sa_flags = SA_NODEFER,
201 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
204 static int console_setup(bool do_reset) {
207 /* If we are init, we connect stdin/stdout/stderr to /dev/null
208 * and make sure we don't have a controlling tty. */
215 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
217 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
221 /* We don't want to force text mode.
222 * plymouth may be showing pictures already from initrd. */
223 r = reset_terminal_fd(tty_fd, false);
225 log_error("Failed to reset /dev/console: %s", strerror(-r));
227 close_nointr_nofail(tty_fd);
231 static int set_default_unit(const char *u) {
240 free(arg_default_unit);
241 arg_default_unit = c;
246 static int parse_proc_cmdline_word(const char *word) {
248 static const char * const rlmap[] = {
249 "emergency", SPECIAL_EMERGENCY_TARGET,
250 "-b", SPECIAL_EMERGENCY_TARGET,
251 "single", SPECIAL_RESCUE_TARGET,
252 "-s", SPECIAL_RESCUE_TARGET,
253 "s", SPECIAL_RESCUE_TARGET,
254 "S", SPECIAL_RESCUE_TARGET,
255 "1", SPECIAL_RESCUE_TARGET,
256 "2", SPECIAL_RUNLEVEL2_TARGET,
257 "3", SPECIAL_RUNLEVEL3_TARGET,
258 "4", SPECIAL_RUNLEVEL4_TARGET,
259 "5", SPECIAL_RUNLEVEL5_TARGET,
264 if (startswith(word, "systemd.unit=")) {
267 return set_default_unit(word + 13);
269 } else if (startswith(word, "rd.systemd.unit=")) {
272 return set_default_unit(word + 16);
274 } else if (startswith(word, "systemd.log_target=")) {
276 if (log_set_target_from_string(word + 19) < 0)
277 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
279 } else if (startswith(word, "systemd.log_level=")) {
281 if (log_set_max_level_from_string(word + 18) < 0)
282 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
284 } else if (startswith(word, "systemd.log_color=")) {
286 if (log_show_color_from_string(word + 18) < 0)
287 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
289 } else if (startswith(word, "systemd.log_location=")) {
291 if (log_show_location_from_string(word + 21) < 0)
292 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
294 } else if (startswith(word, "systemd.dump_core=")) {
297 if ((r = parse_boolean(word + 18)) < 0)
298 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
302 } else if (startswith(word, "systemd.crash_shell=")) {
305 if ((r = parse_boolean(word + 20)) < 0)
306 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
310 } else if (startswith(word, "systemd.confirm_spawn=")) {
313 if ((r = parse_boolean(word + 22)) < 0)
314 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
316 arg_confirm_spawn = r;
318 } else if (startswith(word, "systemd.crash_chvt=")) {
321 if (safe_atoi(word + 19, &k) < 0)
322 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
326 } else if (startswith(word, "systemd.show_status=")) {
329 if ((r = parse_boolean(word + 20)) < 0)
330 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
333 } else if (startswith(word, "systemd.default_standard_output=")) {
336 if ((r = exec_output_from_string(word + 32)) < 0)
337 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
339 arg_default_std_output = r;
340 } else if (startswith(word, "systemd.default_standard_error=")) {
343 if ((r = exec_output_from_string(word + 31)) < 0)
344 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
346 arg_default_std_error = r;
347 } else if (startswith(word, "systemd.setenv=")) {
348 _cleanup_free_ char *cenv = NULL;
352 cenv = strdup(word + 15);
356 eq = strchr(cenv, '=');
358 if (!env_name_is_valid(cenv))
359 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
363 log_warning("Unsetting environment variable '%s' failed, ignoring: %m", cenv);
366 if (!env_assignment_is_valid(cenv))
367 log_warning("Environment variable assignment '%s' is not valid. Ignoring.", cenv);
370 r = setenv(cenv, eq + 1, 1);
372 log_warning("Setting environment variable '%s=%s' failed, ignoring: %m", cenv, eq + 1);
376 } else if (startswith(word, "systemd.") ||
377 (in_initrd() && startswith(word, "rd.systemd."))) {
381 /* Ignore systemd.journald.xyz and friends */
383 if (startswith(c, "rd."))
385 if (startswith(c, "systemd."))
387 if (c[strcspn(c, ".=")] != '.') {
389 log_warning("Unknown kernel switch %s. Ignoring.", word);
391 log_info("Supported kernel switches:\n"
392 "systemd.unit=UNIT Default unit to start\n"
393 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
394 "systemd.dump_core=0|1 Dump core on crash\n"
395 "systemd.crash_shell=0|1 Run shell on crash\n"
396 "systemd.crash_chvt=N Change to VT #N on crash\n"
397 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
398 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
399 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
401 "systemd.log_level=LEVEL Log level\n"
402 "systemd.log_color=0|1 Highlight important log messages\n"
403 "systemd.log_location=0|1 Include code location in log messages\n"
404 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
405 " Set default log output for services\n"
406 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
407 " Set default log error output for services\n"
408 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
411 } else if (streq(word, "quiet"))
412 arg_show_status = false;
413 else if (!in_initrd()) {
416 /* SysV compatibility */
417 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
418 if (streq(word, rlmap[i]))
419 return set_default_unit(rlmap[i+1]);
425 #define DEFINE_SETTER(name, func, descr) \
426 static int name(const char *unit, \
427 const char *filename, \
429 const char *section, \
430 const char *lvalue, \
432 const char *rvalue, \
444 log_syntax(unit, LOG_ERR, filename, line, -r, \
445 "Invalid " descr "'%s': %s", \
446 rvalue, strerror(-r)); \
451 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
452 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
453 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
454 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
457 static int config_parse_cpu_affinity2(const char *unit,
458 const char *filename,
477 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
482 if (!(t = strndup(w, l)))
485 r = safe_atou(t, &cpu);
489 if (!(c = cpu_set_malloc(&ncpus)))
492 if (r < 0 || cpu >= ncpus) {
493 log_syntax(unit, LOG_ERR, filename, line, -r,
494 "Failed to parse CPU affinity '%s'", rvalue);
499 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
503 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
504 log_warning_unit(unit, "Failed to set CPU affinity: %m");
512 static void strv_free_free(char ***l) {
524 static void free_join_controllers(void) {
525 if (!arg_join_controllers)
528 strv_free_free(arg_join_controllers);
529 arg_join_controllers = NULL;
532 static int config_parse_join_controllers(const char *unit,
533 const char *filename,
550 free_join_controllers();
552 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
555 s = strndup(w, length);
559 l = strv_split(s, ",");
564 if (strv_length(l) <= 1) {
569 if (!arg_join_controllers) {
570 arg_join_controllers = new(char**, 2);
571 if (!arg_join_controllers) {
576 arg_join_controllers[0] = l;
577 arg_join_controllers[1] = NULL;
584 t = new0(char**, n+2);
592 for (a = arg_join_controllers; *a; a++) {
594 if (strv_overlap(*a, l)) {
597 c = strv_merge(*a, l);
620 t[n++] = strv_uniq(l);
622 strv_free_free(arg_join_controllers);
623 arg_join_controllers = t;
630 static int parse_config_file(void) {
632 const ConfigTableItem items[] = {
633 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
634 { "Manager", "LogTarget", config_parse_target, 0, NULL },
635 { "Manager", "LogColor", config_parse_color, 0, NULL },
636 { "Manager", "LogLocation", config_parse_location, 0, NULL },
637 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
638 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
639 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
640 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
641 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
642 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
643 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
644 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
645 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
646 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
647 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
648 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
649 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
650 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
651 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
652 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
653 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
654 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
655 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
656 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
657 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
658 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
659 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
660 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
661 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
662 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
663 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
664 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
665 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
666 { NULL, NULL, NULL, 0, NULL }
669 FILE _cleanup_fclose_ *f;
673 fn = arg_running_as == SYSTEMD_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
679 log_warning("Failed to open configuration file '%s': %m", fn);
683 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
685 log_warning("Failed to parse configuration file: %s", strerror(-r));
690 static int parse_proc_cmdline(void) {
691 char *line, *w, *state;
695 /* Don't read /proc/cmdline if we are in a container, since
696 * that is only relevant for the host system */
697 if (detect_container(NULL) > 0)
700 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
701 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
705 FOREACH_WORD_QUOTED(w, l, line, state) {
708 if (!(word = strndup(w, l))) {
713 r = parse_proc_cmdline_word(word);
715 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
730 static int parse_argv(int argc, char *argv[]) {
733 ARG_LOG_LEVEL = 0x100,
742 ARG_DUMP_CONFIGURATION_ITEMS,
750 ARG_DEFAULT_STD_OUTPUT,
751 ARG_DEFAULT_STD_ERROR
754 static const struct option options[] = {
755 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
756 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
757 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
758 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
759 { "unit", required_argument, NULL, ARG_UNIT },
760 { "system", no_argument, NULL, ARG_SYSTEM },
761 { "user", no_argument, NULL, ARG_USER },
762 { "test", no_argument, NULL, ARG_TEST },
763 { "help", no_argument, NULL, 'h' },
764 { "version", no_argument, NULL, ARG_VERSION },
765 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
766 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
767 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
768 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
769 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
770 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
771 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
772 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
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;
944 case ARG_INTROSPECT: {
945 const char * const * i = NULL;
947 for (i = bus_interface_table; *i; i += 2)
948 if (!optarg || streq(i[0], optarg)) {
949 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
952 fputs("</node>\n", stdout);
959 log_error("Unknown interface %s.", optarg);
961 arg_action = ACTION_DONE;
966 arg_action = ACTION_HELP;
970 log_set_max_level(LOG_DEBUG);
976 /* Just to eat away the sysvinit kernel
977 * cmdline args without getopt() error
978 * messages that we'll parse in
979 * parse_proc_cmdline_word() or ignore. */
984 log_error("Unknown option code %c", c);
991 if (optind < argc && getpid() != 1) {
992 /* Hmm, when we aren't run as init system
993 * let's complain about excess arguments */
995 log_error("Excess arguments.");
999 if (detect_container(NULL) > 0) {
1002 /* All /proc/cmdline arguments the kernel didn't
1003 * understand it passed to us. We're not really
1004 * interested in that usually since /proc/cmdline is
1005 * more interesting and complete. With one exception:
1006 * if we are run in a container /proc/cmdline is not
1007 * relevant for the container, hence we rely on argv[]
1010 for (a = argv; a < argv + argc; a++)
1011 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1012 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1020 static int help(void) {
1022 printf("%s [OPTIONS...]\n\n"
1023 "Starts up and maintains the system or user services.\n\n"
1024 " -h --help Show this help\n"
1025 " --test Determine startup sequence, dump it and exit\n"
1026 " --dump-configuration-items Dump understood unit configuration items\n"
1027 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1028 " --unit=UNIT Set default unit\n"
1029 " --system Run a system instance, even if PID != 1\n"
1030 " --user Run a user instance\n"
1031 " --dump-core[=0|1] Dump core on crash\n"
1032 " --crash-shell[=0|1] Run shell on crash\n"
1033 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1034 " --show-status[=0|1] Show status updates on the console during bootup\n"
1035 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1036 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1037 " --log-color[=0|1] Highlight important log messages\n"
1038 " --log-location[=0|1] Include code location in log messages\n"
1039 " --default-standard-output= Set default standard output for services\n"
1040 " --default-standard-error= Set default standard error output for services\n",
1041 program_invocation_short_name);
1046 static int version(void) {
1047 puts(PACKAGE_STRING);
1048 puts(SYSTEMD_FEATURES);
1053 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1062 /* Make sure nothing is really destructed when we shut down */
1065 r = manager_open_serialization(m, &f);
1067 log_error("Failed to create serialization file: %s", strerror(-r));
1074 log_error("Failed to allocate fd set: %s", strerror(-r));
1078 r = manager_serialize(m, f, fds, switching_root);
1080 log_error("Failed to serialize state: %s", strerror(-r));
1084 if (fseeko(f, 0, SEEK_SET) < 0) {
1085 log_error("Failed to rewind serialization fd: %m");
1089 r = fd_cloexec(fileno(f), false);
1091 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1095 r = fdset_cloexec(fds, false);
1097 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1115 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1119 assert(saved_rlimit);
1121 /* Save the original RLIMIT_NOFILE so that we can reset it
1122 * later when transitioning from the initrd to the main
1123 * systemd or suchlike. */
1124 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1125 log_error("Reading RLIMIT_NOFILE failed: %m");
1129 /* Make sure forked processes get the default kernel setting */
1130 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1133 rl = newdup(struct rlimit, saved_rlimit, 1);
1137 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1140 /* Bump up the resource limit for ourselves substantially */
1141 nl.rlim_cur = nl.rlim_max = 64*1024;
1142 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1144 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1151 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1153 unsigned long long a, b;
1157 e = getenv("RD_TIMESTAMP");
1161 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1164 t->realtime = (usec_t) a;
1165 t->monotonic = (usec_t) b;
1170 static void test_mtab(void) {
1173 /* Check that /etc/mtab is a symlink */
1175 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1178 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1185 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1186 "This is not supported anymore. "
1187 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1190 static void test_usr(void) {
1192 /* Check that /usr is not a separate fs */
1194 if (dir_is_empty("/usr") <= 0)
1197 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1198 "Some things will probably break (sometimes even silently) in mysterious ways. "
1199 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1202 static void test_cgroups(void) {
1204 if (access("/proc/cgroups", F_OK) >= 0)
1207 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1208 "Systems without control groups are not supported. "
1209 "We will now sleep for 10s, and then continue boot-up. "
1210 "Expect breakage and please do not file bugs. "
1211 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1212 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1217 static int initialize_join_controllers(void) {
1218 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1219 * + "net_prio". We'd like to add "cpuset" to the mix, but
1220 * "cpuset" does't really work for groups with no initialized
1223 arg_join_controllers = new(char**, 3);
1224 if (!arg_join_controllers)
1227 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1228 if (!arg_join_controllers[0])
1231 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1232 if (!arg_join_controllers[1])
1235 arg_join_controllers[2] = NULL;
1239 int main(int argc, char *argv[]) {
1241 int r, retval = EXIT_FAILURE;
1242 usec_t before_startup, after_startup;
1243 char timespan[FORMAT_TIMESPAN_MAX];
1245 bool reexecute = false;
1246 const char *shutdown_verb = NULL;
1247 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1248 static char systemd[] = "systemd";
1249 bool skip_setup = false;
1251 bool loaded_policy = false;
1252 bool arm_reboot_watchdog = false;
1253 bool queue_default_job = false;
1254 char *switch_root_dir = NULL, *switch_root_init = NULL;
1255 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1257 #ifdef HAVE_SYSV_COMPAT
1258 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1259 /* This is compatibility support for SysV, where
1260 * calling init as a user is identical to telinit. */
1263 execv(SYSTEMCTL_BINARY_PATH, argv);
1264 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1269 /* Determine if this is a reexecution or normal bootup. We do
1270 * the full command line parsing much later, so let's just
1271 * have a quick peek here. */
1272 if (strv_find(argv+1, "--deserialize"))
1275 /* If we have switched root, do all the special setup
1277 if (strv_find(argv+1, "--switched-root"))
1280 /* If we get started via the /sbin/init symlink then we are
1281 called 'init'. After a subsequent reexecution we are then
1282 called 'systemd'. That is confusing, hence let's call us
1283 systemd right-away. */
1284 program_invocation_short_name = systemd;
1285 prctl(PR_SET_NAME, systemd);
1290 log_show_color(isatty(STDERR_FILENO) > 0);
1292 if (getpid() == 1 && detect_container(NULL) <= 0) {
1294 /* Running outside of a container as PID 1 */
1295 arg_running_as = SYSTEMD_SYSTEM;
1297 log_set_target(LOG_TARGET_KMSG);
1301 char *rd_timestamp = NULL;
1303 dual_timestamp_get(&initrd_timestamp);
1304 asprintf(&rd_timestamp, "%llu %llu",
1305 (unsigned long long) initrd_timestamp.realtime,
1306 (unsigned long long) initrd_timestamp.monotonic);
1308 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1314 mount_setup_early();
1315 if (selinux_setup(&loaded_policy) < 0)
1317 if (ima_setup() < 0)
1319 if (smack_setup() < 0)
1323 if (label_init(NULL) < 0)
1327 if (hwclock_is_localtime() > 0) {
1330 /* The first-time call to settimeofday() does a time warp in the kernel */
1331 r = hwclock_set_timezone(&min);
1333 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1335 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1336 } else if (!in_initrd()) {
1338 * Do dummy first-time call to seal the kernel's time warp magic
1340 * Do not call this this from inside the initrd. The initrd might not
1341 * carry /etc/adjtime with LOCAL, but the real system could be set up
1342 * that way. In such case, we need to delay the time-warp or the sealing
1343 * until we reach the real system.
1345 hwclock_reset_timezone();
1347 /* Tell the kernel our time zone */
1348 r = hwclock_set_timezone(NULL);
1350 log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
1354 /* Set the default for later on, but don't actually
1355 * open the logs like this for now. Note that if we
1356 * are transitioning from the initrd there might still
1357 * be journal fd open, and we shouldn't attempt
1358 * opening that before we parsed /proc/cmdline which
1359 * might redirect output elsewhere. */
1360 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1362 } else if (getpid() == 1) {
1364 /* Running inside a container, as PID 1 */
1365 arg_running_as = SYSTEMD_SYSTEM;
1366 log_set_target(LOG_TARGET_CONSOLE);
1369 /* For the later on, see above... */
1370 log_set_target(LOG_TARGET_JOURNAL);
1374 /* Running as user instance */
1375 arg_running_as = SYSTEMD_USER;
1376 log_set_target(LOG_TARGET_AUTO);
1380 /* Initialize default unit */
1381 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1383 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1387 r = initialize_join_controllers();
1391 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1392 * /proc/$PID/fd is available. */
1393 if (getpid() == 1) {
1394 r = mount_setup(loaded_policy);
1399 /* Reset all signal handlers. */
1400 assert_se(reset_all_signal_handlers() == 0);
1402 /* If we are init, we can block sigkill. Yay. */
1403 ignore_signals(SIGNALS_IGNORE, -1);
1405 if (parse_config_file() < 0)
1408 if (arg_running_as == SYSTEMD_SYSTEM)
1409 if (parse_proc_cmdline() < 0)
1412 log_parse_environment();
1414 if (parse_argv(argc, argv) < 0)
1417 if (arg_action == ACTION_TEST &&
1419 log_error("Don't run test mode as root.");
1423 if (arg_running_as == SYSTEMD_USER &&
1424 arg_action == ACTION_RUN &&
1426 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1430 if (arg_running_as == SYSTEMD_SYSTEM &&
1431 arg_action == ACTION_RUN &&
1432 running_in_chroot() > 0) {
1433 log_error("Cannot be run in a chroot() environment.");
1437 if (arg_action == ACTION_HELP) {
1440 } else if (arg_action == ACTION_VERSION) {
1443 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1444 unit_dump_config_items(stdout);
1445 retval = EXIT_SUCCESS;
1447 } else if (arg_action == ACTION_DONE) {
1448 retval = EXIT_SUCCESS;
1452 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1454 /* Close logging fds, in order not to confuse fdset below */
1457 /* Remember open file descriptors for later deserialization */
1458 r = fdset_new_fill(&fds);
1460 log_error("Failed to allocate fd set: %s", strerror(-r));
1463 fdset_cloexec(fds, true);
1466 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1468 /* Set up PATH unless it is already set */
1470 #ifdef HAVE_SPLIT_USR
1471 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1473 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1475 arg_running_as == SYSTEMD_SYSTEM);
1477 if (arg_running_as == SYSTEMD_SYSTEM) {
1478 /* Parse the data passed to us. We leave this
1479 * variables set, but the manager later on will not
1480 * pass them on to our children. */
1482 parse_initrd_timestamp(&initrd_timestamp);
1484 /* Unset some environment variables passed in from the
1485 * kernel that don't really make sense for us. */
1489 /* When we are invoked by a shell, these might be set,
1490 * but make little sense to pass on */
1495 /* When we are invoked by a chroot-like tool such as
1496 * nspawn, these might be set, but make little sense
1499 unsetenv("LOGNAME");
1501 /* We suppress the socket activation env vars, as
1502 * we'll try to match *any* open fd to units if
1504 unsetenv("LISTEN_FDS");
1505 unsetenv("LISTEN_PID");
1507 /* All other variables are left as is, so that clients
1508 * can still read them via /proc/1/environ */
1511 /* Move out of the way, so that we won't block unmounts */
1512 assert_se(chdir("/") == 0);
1514 if (arg_running_as == SYSTEMD_SYSTEM) {
1515 /* Become a session leader if we aren't one yet. */
1518 /* Disable the umask logic */
1522 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1523 dbus_connection_set_change_sigpipe(FALSE);
1525 /* Reset the console, but only if this is really init and we
1526 * are freshly booted */
1527 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1528 console_setup(getpid() == 1 && !skip_setup);
1530 /* Open the logging devices, if possible and necessary */
1533 /* Make sure we leave a core dump without panicing the
1535 if (getpid() == 1) {
1536 install_crash_handler();
1538 r = mount_cgroup_controllers(arg_join_controllers);
1543 if (arg_running_as == SYSTEMD_SYSTEM) {
1544 const char *virtualization = NULL;
1546 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1548 detect_virtualization(&virtualization);
1550 log_info("Detected virtualization '%s'.", virtualization);
1553 log_info("Running in initial RAM disk.");
1556 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1558 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1561 if (arg_show_status || plymouth_running())
1576 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1577 watchdog_set_timeout(&arg_runtime_watchdog);
1579 if (arg_timer_slack_nsec != (nsec_t) -1)
1580 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1581 log_error("Failed to adjust timer slack: %m");
1583 if (arg_capability_bounding_set_drop) {
1584 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1586 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1589 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1591 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1596 if (arg_running_as == SYSTEMD_USER) {
1597 /* Become reaper of our children */
1598 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1599 log_warning("Failed to make us a subreaper: %m");
1600 if (errno == EINVAL)
1601 log_info("Perhaps the kernel version is too old (< 3.4?)");
1605 if (arg_running_as == SYSTEMD_SYSTEM)
1606 bump_rlimit_nofile(&saved_rlimit_nofile);
1608 r = manager_new(arg_running_as, &m);
1610 log_error("Failed to allocate manager object: %s", strerror(-r));
1614 m->confirm_spawn = arg_confirm_spawn;
1615 m->default_std_output = arg_default_std_output;
1616 m->default_std_error = arg_default_std_error;
1617 m->runtime_watchdog = arg_runtime_watchdog;
1618 m->shutdown_watchdog = arg_shutdown_watchdog;
1620 manager_set_default_rlimits(m, arg_default_rlimit);
1622 if (dual_timestamp_is_set(&initrd_timestamp))
1623 m->initrd_timestamp = initrd_timestamp;
1625 if (arg_default_controllers)
1626 manager_set_default_controllers(m, arg_default_controllers);
1628 manager_set_show_status(m, arg_show_status);
1630 /* Remember whether we should queue the default job */
1631 queue_default_job = !serialization || arg_switched_root;
1633 before_startup = now(CLOCK_MONOTONIC);
1635 r = manager_startup(m, serialization, fds);
1637 log_error("Failed to fully start up daemon: %s", strerror(-r));
1639 /* This will close all file descriptors that were opened, but
1640 * not claimed by any unit. */
1643 if (serialization) {
1644 fclose(serialization);
1645 serialization = NULL;
1648 if (queue_default_job) {
1650 Unit *target = NULL;
1651 Job *default_unit_job;
1653 dbus_error_init(&error);
1655 log_debug("Activating default unit: %s", arg_default_unit);
1657 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1659 log_error("Failed to load default target: %s", bus_error(&error, r));
1660 dbus_error_free(&error);
1661 } else if (target->load_state == UNIT_ERROR)
1662 log_error("Failed to load default target: %s", strerror(-target->load_error));
1663 else if (target->load_state == UNIT_MASKED)
1664 log_error("Default target masked.");
1666 if (!target || target->load_state != UNIT_LOADED) {
1667 log_info("Trying to load rescue target...");
1669 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1671 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1672 dbus_error_free(&error);
1674 } else if (target->load_state == UNIT_ERROR) {
1675 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1677 } else if (target->load_state == UNIT_MASKED) {
1678 log_error("Rescue target masked.");
1683 assert(target->load_state == UNIT_LOADED);
1685 if (arg_action == ACTION_TEST) {
1686 printf("-> By units:\n");
1687 manager_dump_units(m, stdout, "\t");
1690 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1692 log_error("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1693 dbus_error_free(&error);
1695 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1697 log_error("Failed to start default target: %s", bus_error(&error, r));
1698 dbus_error_free(&error);
1702 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1703 dbus_error_free(&error);
1707 m->default_unit_job_id = default_unit_job->id;
1709 after_startup = now(CLOCK_MONOTONIC);
1710 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1711 "Loaded units and determined initial transaction in %s.",
1712 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1714 if (arg_action == ACTION_TEST) {
1715 printf("-> By jobs:\n");
1716 manager_dump_jobs(m, stdout, "\t");
1717 retval = EXIT_SUCCESS;
1723 r = manager_loop(m);
1725 log_error("Failed to run mainloop: %s", strerror(-r));
1729 switch (m->exit_code) {
1732 retval = EXIT_SUCCESS;
1736 case MANAGER_RELOAD:
1737 log_info("Reloading.");
1738 r = manager_reload(m);
1740 log_error("Failed to reload: %s", strerror(-r));
1743 case MANAGER_REEXECUTE:
1745 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1749 log_notice("Reexecuting.");
1752 case MANAGER_SWITCH_ROOT:
1753 /* Steal the switch root parameters */
1754 switch_root_dir = m->switch_root;
1755 switch_root_init = m->switch_root_init;
1756 m->switch_root = m->switch_root_init = NULL;
1758 if (!switch_root_init)
1759 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1763 log_notice("Switching root.");
1766 case MANAGER_REBOOT:
1767 case MANAGER_POWEROFF:
1769 case MANAGER_KEXEC: {
1770 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1771 [MANAGER_REBOOT] = "reboot",
1772 [MANAGER_POWEROFF] = "poweroff",
1773 [MANAGER_HALT] = "halt",
1774 [MANAGER_KEXEC] = "kexec"
1777 assert_se(shutdown_verb = table[m->exit_code]);
1778 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1780 log_notice("Shutting down.");
1785 assert_not_reached("Unknown exit code.");
1793 for (j = 0; j < RLIMIT_NLIMITS; j++)
1794 free(arg_default_rlimit[j]);
1796 free(arg_default_unit);
1797 strv_free(arg_default_controllers);
1798 free_join_controllers();
1805 unsigned i, args_size;
1807 /* Close and disarm the watchdog, so that the new
1808 * instance can reinitialize it, but doesn't get
1809 * rebooted while we do that */
1810 watchdog_close(true);
1812 /* Reset the RLIMIT_NOFILE to the kernel default, so
1813 * that the new systemd can pass the kernel default to
1814 * its child processes */
1815 if (saved_rlimit_nofile.rlim_cur > 0)
1816 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1818 if (switch_root_dir) {
1819 /* Kill all remaining processes from the
1820 * initrd, but don't wait for them, so that we
1821 * can handle the SIGCHLD for them after
1823 broadcast_signal(SIGTERM, false);
1825 /* And switch root */
1826 r = switch_root(switch_root_dir);
1828 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1831 args_size = MAX(6, argc+1);
1832 args = newa(const char*, args_size);
1834 if (!switch_root_init) {
1837 /* First try to spawn ourselves with the right
1838 * path, and with full serialization. We do
1839 * this only if the user didn't specify an
1840 * explicit init to spawn. */
1842 assert(serialization);
1845 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1849 args[i++] = SYSTEMD_BINARY_PATH;
1850 if (switch_root_dir)
1851 args[i++] = "--switched-root";
1852 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1853 args[i++] = "--deserialize";
1857 assert(i <= args_size);
1858 execv(args[0], (char* const*) args);
1861 /* Try the fallback, if there is any, without any
1862 * serialization. We pass the original argv[] and
1863 * envp[]. (Well, modulo the ordering changes due to
1864 * getopt() in argv[], and some cleanups in envp[],
1865 * but let's hope that doesn't matter.) */
1867 if (serialization) {
1868 fclose(serialization);
1869 serialization = NULL;
1877 /* Reopen the console */
1878 make_console_stdio();
1880 for (j = 1, i = 1; j < argc; j++)
1881 args[i++] = argv[j];
1883 assert(i <= args_size);
1885 if (switch_root_init) {
1886 args[0] = switch_root_init;
1887 execv(args[0], (char* const*) args);
1888 log_warning("Failed to execute configured init, trying fallback: %m");
1891 args[0] = "/sbin/init";
1892 execv(args[0], (char* const*) args);
1894 if (errno == ENOENT) {
1895 log_warning("No /sbin/init, trying fallback");
1897 args[0] = "/bin/sh";
1899 execv(args[0], (char* const*) args);
1900 log_error("Failed to execute /bin/sh, giving up: %m");
1902 log_warning("Failed to execute /sbin/init, giving up: %m");
1906 fclose(serialization);
1911 if (shutdown_verb) {
1912 const char * command_line[] = {
1913 SYSTEMD_SHUTDOWN_BINARY_PATH,
1919 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1922 /* If we reboot let's set the shutdown
1923 * watchdog and tell the shutdown binary to
1924 * repeatedly ping it */
1925 watchdog_set_timeout(&arg_shutdown_watchdog);
1926 watchdog_close(false);
1928 /* Tell the binary how often to ping */
1929 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1932 env_block = strv_append(environ, e);
1934 env_block = strv_copy(environ);
1935 watchdog_close(true);
1938 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1940 log_error("Failed to execute shutdown binary, freezing: %m");