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 "dbus-common.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 strv_free_free(arg_join_controllers);
526 arg_join_controllers = NULL;
529 static int config_parse_join_controllers(const char *unit,
530 const char *filename,
547 free_join_controllers();
549 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
552 s = strndup(w, length);
556 l = strv_split(s, ",");
561 if (strv_length(l) <= 1) {
566 if (!arg_join_controllers) {
567 arg_join_controllers = new(char**, 2);
568 if (!arg_join_controllers) {
573 arg_join_controllers[0] = l;
574 arg_join_controllers[1] = NULL;
581 t = new0(char**, n+2);
589 for (a = arg_join_controllers; *a; a++) {
591 if (strv_overlap(*a, l)) {
594 c = strv_merge(*a, l);
617 t[n++] = strv_uniq(l);
619 strv_free_free(arg_join_controllers);
620 arg_join_controllers = t;
627 static int parse_config_file(void) {
629 const ConfigTableItem items[] = {
630 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
631 { "Manager", "LogTarget", config_parse_target, 0, NULL },
632 { "Manager", "LogColor", config_parse_color, 0, NULL },
633 { "Manager", "LogLocation", config_parse_location, 0, NULL },
634 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
635 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
636 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
637 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
638 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
639 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
640 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
641 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
642 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
643 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
644 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
645 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
646 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
647 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
648 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
649 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
650 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
651 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
652 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
653 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
654 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
655 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
656 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
657 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
658 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
659 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
660 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
661 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
662 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
663 { NULL, NULL, NULL, 0, NULL }
666 _cleanup_fclose_ FILE *f;
670 fn = arg_running_as == SYSTEMD_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
676 log_warning("Failed to open configuration file '%s': %m", fn);
680 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
682 log_warning("Failed to parse configuration file: %s", strerror(-r));
687 static int parse_proc_cmdline(void) {
688 _cleanup_free_ char *line = NULL;
693 /* Don't read /proc/cmdline if we are in a container, since
694 * that is only relevant for the host system */
695 if (detect_container(NULL) > 0)
698 r = read_one_line_file("/proc/cmdline", &line);
700 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
704 FOREACH_WORD_QUOTED(w, l, line, state) {
705 _cleanup_free_ char *word;
707 word = strndup(w, l);
711 r = parse_proc_cmdline_word(word);
713 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
721 static int parse_argv(int argc, char *argv[]) {
724 ARG_LOG_LEVEL = 0x100,
733 ARG_DUMP_CONFIGURATION_ITEMS,
741 ARG_DEFAULT_STD_OUTPUT,
742 ARG_DEFAULT_STD_ERROR
745 static const struct option options[] = {
746 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
747 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
748 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
749 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
750 { "unit", required_argument, NULL, ARG_UNIT },
751 { "system", no_argument, NULL, ARG_SYSTEM },
752 { "user", no_argument, NULL, ARG_USER },
753 { "test", no_argument, NULL, ARG_TEST },
754 { "help", no_argument, NULL, 'h' },
755 { "version", no_argument, NULL, ARG_VERSION },
756 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
757 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
758 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
759 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
760 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
761 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
762 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
763 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
764 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
765 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
777 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
782 if ((r = log_set_max_level_from_string(optarg)) < 0) {
783 log_error("Failed to parse log level %s.", optarg);
791 if ((r = log_set_target_from_string(optarg)) < 0) {
792 log_error("Failed to parse log target %s.", optarg);
801 if ((r = log_show_color_from_string(optarg)) < 0) {
802 log_error("Failed to parse log color setting %s.", optarg);
806 log_show_color(true);
810 case ARG_LOG_LOCATION:
813 if ((r = log_show_location_from_string(optarg)) < 0) {
814 log_error("Failed to parse log location setting %s.", optarg);
818 log_show_location(true);
822 case ARG_DEFAULT_STD_OUTPUT:
824 if ((r = exec_output_from_string(optarg)) < 0) {
825 log_error("Failed to parse default standard output setting %s.", optarg);
828 arg_default_std_output = r;
831 case ARG_DEFAULT_STD_ERROR:
833 if ((r = exec_output_from_string(optarg)) < 0) {
834 log_error("Failed to parse default standard error output setting %s.", optarg);
837 arg_default_std_error = r;
842 if ((r = set_default_unit(optarg)) < 0) {
843 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
850 arg_running_as = SYSTEMD_SYSTEM;
854 arg_running_as = SYSTEMD_USER;
858 arg_action = ACTION_TEST;
862 arg_action = ACTION_VERSION;
865 case ARG_DUMP_CONFIGURATION_ITEMS:
866 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
870 r = optarg ? parse_boolean(optarg) : 1;
872 log_error("Failed to parse dump core boolean %s.", optarg);
878 case ARG_CRASH_SHELL:
879 r = optarg ? parse_boolean(optarg) : 1;
881 log_error("Failed to parse crash shell boolean %s.", optarg);
887 case ARG_CONFIRM_SPAWN:
888 r = optarg ? parse_boolean(optarg) : 1;
890 log_error("Failed to parse confirm spawn boolean %s.", optarg);
893 arg_confirm_spawn = r;
896 case ARG_SHOW_STATUS:
897 r = optarg ? parse_boolean(optarg) : 1;
899 log_error("Failed to parse show status boolean %s.", optarg);
905 case ARG_DESERIALIZE: {
909 r = safe_atoi(optarg, &fd);
910 if (r < 0 || fd < 0) {
911 log_error("Failed to parse deserialize option %s.", optarg);
912 return r < 0 ? r : -EINVAL;
915 fd_cloexec(fd, true);
919 log_error("Failed to open serialization fd: %m");
924 fclose(serialization);
931 case ARG_SWITCHED_ROOT:
932 arg_switched_root = true;
935 case ARG_INTROSPECT: {
936 const char * const * i = NULL;
938 for (i = bus_interface_table; *i; i += 2)
939 if (!optarg || streq(i[0], optarg)) {
940 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
943 fputs("</node>\n", stdout);
950 log_error("Unknown interface %s.", optarg);
952 arg_action = ACTION_DONE;
957 arg_action = ACTION_HELP;
961 log_set_max_level(LOG_DEBUG);
967 /* Just to eat away the sysvinit kernel
968 * cmdline args without getopt() error
969 * messages that we'll parse in
970 * parse_proc_cmdline_word() or ignore. */
975 log_error("Unknown option code %c", c);
982 if (optind < argc && getpid() != 1) {
983 /* Hmm, when we aren't run as init system
984 * let's complain about excess arguments */
986 log_error("Excess arguments.");
990 if (detect_container(NULL) > 0) {
993 /* All /proc/cmdline arguments the kernel didn't
994 * understand it passed to us. We're not really
995 * interested in that usually since /proc/cmdline is
996 * more interesting and complete. With one exception:
997 * if we are run in a container /proc/cmdline is not
998 * relevant for the container, hence we rely on argv[]
1001 for (a = argv; a < argv + argc; a++)
1002 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1003 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1011 static int help(void) {
1013 printf("%s [OPTIONS...]\n\n"
1014 "Starts up and maintains the system or user services.\n\n"
1015 " -h --help Show this help\n"
1016 " --test Determine startup sequence, dump it and exit\n"
1017 " --dump-configuration-items Dump understood unit configuration items\n"
1018 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1019 " --unit=UNIT Set default unit\n"
1020 " --system Run a system instance, even if PID != 1\n"
1021 " --user Run a user instance\n"
1022 " --dump-core[=0|1] Dump core on crash\n"
1023 " --crash-shell[=0|1] Run shell on crash\n"
1024 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1025 " --show-status[=0|1] Show status updates on the console during bootup\n"
1026 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1027 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1028 " --log-color[=0|1] Highlight important log messages\n"
1029 " --log-location[=0|1] Include code location in log messages\n"
1030 " --default-standard-output= Set default standard output for services\n"
1031 " --default-standard-error= Set default standard error output for services\n",
1032 program_invocation_short_name);
1037 static int version(void) {
1038 puts(PACKAGE_STRING);
1039 puts(SYSTEMD_FEATURES);
1044 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1053 /* Make sure nothing is really destructed when we shut down */
1056 r = manager_open_serialization(m, &f);
1058 log_error("Failed to create serialization file: %s", strerror(-r));
1065 log_error("Failed to allocate fd set: %s", strerror(-r));
1069 r = manager_serialize(m, f, fds, switching_root);
1071 log_error("Failed to serialize state: %s", strerror(-r));
1075 if (fseeko(f, 0, SEEK_SET) < 0) {
1076 log_error("Failed to rewind serialization fd: %m");
1080 r = fd_cloexec(fileno(f), false);
1082 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1086 r = fdset_cloexec(fds, false);
1088 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1106 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1110 assert(saved_rlimit);
1112 /* Save the original RLIMIT_NOFILE so that we can reset it
1113 * later when transitioning from the initrd to the main
1114 * systemd or suchlike. */
1115 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1116 log_error("Reading RLIMIT_NOFILE failed: %m");
1120 /* Make sure forked processes get the default kernel setting */
1121 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1124 rl = newdup(struct rlimit, saved_rlimit, 1);
1128 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1131 /* Bump up the resource limit for ourselves substantially */
1132 nl.rlim_cur = nl.rlim_max = 64*1024;
1133 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1135 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1142 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1144 unsigned long long a, b;
1148 e = getenv("RD_TIMESTAMP");
1152 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1155 t->realtime = (usec_t) a;
1156 t->monotonic = (usec_t) b;
1161 static void test_mtab(void) {
1164 /* Check that /etc/mtab is a symlink */
1166 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1169 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1176 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1177 "This is not supported anymore. "
1178 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1181 static void test_usr(void) {
1183 /* Check that /usr is not a separate fs */
1185 if (dir_is_empty("/usr") <= 0)
1188 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1189 "Some things will probably break (sometimes even silently) in mysterious ways. "
1190 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1193 static void test_cgroups(void) {
1195 if (access("/proc/cgroups", F_OK) >= 0)
1198 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1199 "Systems without control groups are not supported. "
1200 "We will now sleep for 10s, and then continue boot-up. "
1201 "Expect breakage and please do not file bugs. "
1202 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1203 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1208 static int initialize_join_controllers(void) {
1209 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1210 * + "net_prio". We'd like to add "cpuset" to the mix, but
1211 * "cpuset" does't really work for groups with no initialized
1214 arg_join_controllers = new(char**, 3);
1215 if (!arg_join_controllers)
1218 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1219 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1220 arg_join_controllers[2] = NULL;
1222 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1223 free_join_controllers();
1230 int main(int argc, char *argv[]) {
1232 int r, retval = EXIT_FAILURE;
1233 usec_t before_startup, after_startup;
1234 char timespan[FORMAT_TIMESPAN_MAX];
1236 bool reexecute = false;
1237 const char *shutdown_verb = NULL;
1238 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1239 static char systemd[] = "systemd";
1240 bool skip_setup = false;
1242 bool loaded_policy = false;
1243 bool arm_reboot_watchdog = false;
1244 bool queue_default_job = false;
1245 char *switch_root_dir = NULL, *switch_root_init = NULL;
1246 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1248 #ifdef HAVE_SYSV_COMPAT
1249 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1250 /* This is compatibility support for SysV, where
1251 * calling init as a user is identical to telinit. */
1254 execv(SYSTEMCTL_BINARY_PATH, argv);
1255 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1260 /* Determine if this is a reexecution or normal bootup. We do
1261 * the full command line parsing much later, so let's just
1262 * have a quick peek here. */
1263 if (strv_find(argv+1, "--deserialize"))
1266 /* If we have switched root, do all the special setup
1268 if (strv_find(argv+1, "--switched-root"))
1271 /* If we get started via the /sbin/init symlink then we are
1272 called 'init'. After a subsequent reexecution we are then
1273 called 'systemd'. That is confusing, hence let's call us
1274 systemd right-away. */
1275 program_invocation_short_name = systemd;
1276 prctl(PR_SET_NAME, systemd);
1281 log_show_color(isatty(STDERR_FILENO) > 0);
1283 if (getpid() == 1 && detect_container(NULL) <= 0) {
1285 /* Running outside of a container as PID 1 */
1286 arg_running_as = SYSTEMD_SYSTEM;
1288 log_set_target(LOG_TARGET_KMSG);
1292 char *rd_timestamp = NULL;
1294 dual_timestamp_get(&initrd_timestamp);
1295 asprintf(&rd_timestamp, "%llu %llu",
1296 (unsigned long long) initrd_timestamp.realtime,
1297 (unsigned long long) initrd_timestamp.monotonic);
1299 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1305 mount_setup_early();
1306 if (selinux_setup(&loaded_policy) < 0)
1308 if (ima_setup() < 0)
1310 if (smack_setup() < 0)
1314 if (label_init(NULL) < 0)
1318 if (hwclock_is_localtime() > 0) {
1321 /* The first-time call to settimeofday() does a time warp in the kernel */
1322 r = hwclock_set_timezone(&min);
1324 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1326 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1327 } else if (!in_initrd()) {
1329 * Do dummy first-time call to seal the kernel's time warp magic
1331 * Do not call this this from inside the initrd. The initrd might not
1332 * carry /etc/adjtime with LOCAL, but the real system could be set up
1333 * that way. In such case, we need to delay the time-warp or the sealing
1334 * until we reach the real system.
1336 hwclock_reset_timezone();
1338 /* Tell the kernel our time zone */
1339 r = hwclock_set_timezone(NULL);
1341 log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
1345 /* Set the default for later on, but don't actually
1346 * open the logs like this for now. Note that if we
1347 * are transitioning from the initrd there might still
1348 * be journal fd open, and we shouldn't attempt
1349 * opening that before we parsed /proc/cmdline which
1350 * might redirect output elsewhere. */
1351 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1353 } else if (getpid() == 1) {
1355 /* Running inside a container, as PID 1 */
1356 arg_running_as = SYSTEMD_SYSTEM;
1357 log_set_target(LOG_TARGET_CONSOLE);
1360 /* For the later on, see above... */
1361 log_set_target(LOG_TARGET_JOURNAL);
1365 /* Running as user instance */
1366 arg_running_as = SYSTEMD_USER;
1367 log_set_target(LOG_TARGET_AUTO);
1371 /* Initialize default unit */
1372 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1374 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1378 r = initialize_join_controllers();
1382 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1383 * /proc/$PID/fd is available. */
1384 if (getpid() == 1) {
1385 r = mount_setup(loaded_policy);
1390 /* Reset all signal handlers. */
1391 assert_se(reset_all_signal_handlers() == 0);
1393 /* If we are init, we can block sigkill. Yay. */
1394 ignore_signals(SIGNALS_IGNORE, -1);
1396 if (parse_config_file() < 0)
1399 if (arg_running_as == SYSTEMD_SYSTEM)
1400 if (parse_proc_cmdline() < 0)
1403 log_parse_environment();
1405 if (parse_argv(argc, argv) < 0)
1408 if (arg_action == ACTION_TEST &&
1410 log_error("Don't run test mode as root.");
1414 if (arg_running_as == SYSTEMD_USER &&
1415 arg_action == ACTION_RUN &&
1417 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1421 if (arg_running_as == SYSTEMD_SYSTEM &&
1422 arg_action == ACTION_RUN &&
1423 running_in_chroot() > 0) {
1424 log_error("Cannot be run in a chroot() environment.");
1428 if (arg_action == ACTION_HELP) {
1431 } else if (arg_action == ACTION_VERSION) {
1434 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1435 unit_dump_config_items(stdout);
1436 retval = EXIT_SUCCESS;
1438 } else if (arg_action == ACTION_DONE) {
1439 retval = EXIT_SUCCESS;
1443 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1445 /* Close logging fds, in order not to confuse fdset below */
1448 /* Remember open file descriptors for later deserialization */
1449 r = fdset_new_fill(&fds);
1451 log_error("Failed to allocate fd set: %s", strerror(-r));
1454 fdset_cloexec(fds, true);
1457 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1459 /* Set up PATH unless it is already set */
1461 #ifdef HAVE_SPLIT_USR
1462 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1464 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1466 arg_running_as == SYSTEMD_SYSTEM);
1468 if (arg_running_as == SYSTEMD_SYSTEM) {
1469 /* Parse the data passed to us. We leave this
1470 * variables set, but the manager later on will not
1471 * pass them on to our children. */
1473 parse_initrd_timestamp(&initrd_timestamp);
1475 /* Unset some environment variables passed in from the
1476 * kernel that don't really make sense for us. */
1480 /* When we are invoked by a shell, these might be set,
1481 * but make little sense to pass on */
1486 /* When we are invoked by a chroot-like tool such as
1487 * nspawn, these might be set, but make little sense
1490 unsetenv("LOGNAME");
1492 /* We suppress the socket activation env vars, as
1493 * we'll try to match *any* open fd to units if
1495 unsetenv("LISTEN_FDS");
1496 unsetenv("LISTEN_PID");
1498 /* All other variables are left as is, so that clients
1499 * can still read them via /proc/1/environ */
1502 /* Move out of the way, so that we won't block unmounts */
1503 assert_se(chdir("/") == 0);
1505 if (arg_running_as == SYSTEMD_SYSTEM) {
1506 /* Become a session leader if we aren't one yet. */
1509 /* Disable the umask logic */
1513 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1514 dbus_connection_set_change_sigpipe(FALSE);
1516 /* Reset the console, but only if this is really init and we
1517 * are freshly booted */
1518 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1519 console_setup(getpid() == 1 && !skip_setup);
1521 /* Open the logging devices, if possible and necessary */
1524 /* Make sure we leave a core dump without panicing the
1526 if (getpid() == 1) {
1527 install_crash_handler();
1529 r = mount_cgroup_controllers(arg_join_controllers);
1534 if (arg_running_as == SYSTEMD_SYSTEM) {
1535 const char *virtualization = NULL;
1537 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1539 detect_virtualization(&virtualization);
1541 log_info("Detected virtualization '%s'.", virtualization);
1544 log_info("Running in initial RAM disk.");
1547 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1549 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1552 if (arg_show_status || plymouth_running())
1567 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1568 watchdog_set_timeout(&arg_runtime_watchdog);
1570 if (arg_timer_slack_nsec != (nsec_t) -1)
1571 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1572 log_error("Failed to adjust timer slack: %m");
1574 if (arg_capability_bounding_set_drop) {
1575 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1577 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1580 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1582 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1587 if (arg_running_as == SYSTEMD_USER) {
1588 /* Become reaper of our children */
1589 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1590 log_warning("Failed to make us a subreaper: %m");
1591 if (errno == EINVAL)
1592 log_info("Perhaps the kernel version is too old (< 3.4?)");
1596 if (arg_running_as == SYSTEMD_SYSTEM)
1597 bump_rlimit_nofile(&saved_rlimit_nofile);
1599 r = manager_new(arg_running_as, &m);
1601 log_error("Failed to allocate manager object: %s", strerror(-r));
1605 m->confirm_spawn = arg_confirm_spawn;
1606 m->default_std_output = arg_default_std_output;
1607 m->default_std_error = arg_default_std_error;
1608 m->runtime_watchdog = arg_runtime_watchdog;
1609 m->shutdown_watchdog = arg_shutdown_watchdog;
1611 manager_set_default_rlimits(m, arg_default_rlimit);
1613 if (dual_timestamp_is_set(&initrd_timestamp))
1614 m->initrd_timestamp = initrd_timestamp;
1616 if (arg_default_controllers)
1617 manager_set_default_controllers(m, arg_default_controllers);
1619 manager_set_show_status(m, arg_show_status);
1621 /* Remember whether we should queue the default job */
1622 queue_default_job = !serialization || arg_switched_root;
1624 before_startup = now(CLOCK_MONOTONIC);
1626 r = manager_startup(m, serialization, fds);
1628 log_error("Failed to fully start up daemon: %s", strerror(-r));
1630 /* This will close all file descriptors that were opened, but
1631 * not claimed by any unit. */
1634 if (serialization) {
1635 fclose(serialization);
1636 serialization = NULL;
1639 if (queue_default_job) {
1641 Unit *target = NULL;
1642 Job *default_unit_job;
1644 dbus_error_init(&error);
1646 log_debug("Activating default unit: %s", arg_default_unit);
1648 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1650 log_error("Failed to load default target: %s", bus_error(&error, r));
1651 dbus_error_free(&error);
1652 } else if (target->load_state == UNIT_ERROR)
1653 log_error("Failed to load default target: %s", strerror(-target->load_error));
1654 else if (target->load_state == UNIT_MASKED)
1655 log_error("Default target masked.");
1657 if (!target || target->load_state != UNIT_LOADED) {
1658 log_info("Trying to load rescue target...");
1660 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1662 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1663 dbus_error_free(&error);
1665 } else if (target->load_state == UNIT_ERROR) {
1666 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1668 } else if (target->load_state == UNIT_MASKED) {
1669 log_error("Rescue target masked.");
1674 assert(target->load_state == UNIT_LOADED);
1676 if (arg_action == ACTION_TEST) {
1677 printf("-> By units:\n");
1678 manager_dump_units(m, stdout, "\t");
1681 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1683 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1684 dbus_error_free(&error);
1686 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1688 log_error("Failed to start default target: %s", bus_error(&error, r));
1689 dbus_error_free(&error);
1693 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1694 dbus_error_free(&error);
1698 m->default_unit_job_id = default_unit_job->id;
1700 after_startup = now(CLOCK_MONOTONIC);
1701 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1702 "Loaded units and determined initial transaction in %s.",
1703 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1705 if (arg_action == ACTION_TEST) {
1706 printf("-> By jobs:\n");
1707 manager_dump_jobs(m, stdout, "\t");
1708 retval = EXIT_SUCCESS;
1714 r = manager_loop(m);
1716 log_error("Failed to run mainloop: %s", strerror(-r));
1720 switch (m->exit_code) {
1723 retval = EXIT_SUCCESS;
1727 case MANAGER_RELOAD:
1728 log_info("Reloading.");
1729 r = manager_reload(m);
1731 log_error("Failed to reload: %s", strerror(-r));
1734 case MANAGER_REEXECUTE:
1736 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1740 log_notice("Reexecuting.");
1743 case MANAGER_SWITCH_ROOT:
1744 /* Steal the switch root parameters */
1745 switch_root_dir = m->switch_root;
1746 switch_root_init = m->switch_root_init;
1747 m->switch_root = m->switch_root_init = NULL;
1749 if (!switch_root_init)
1750 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1754 log_notice("Switching root.");
1757 case MANAGER_REBOOT:
1758 case MANAGER_POWEROFF:
1760 case MANAGER_KEXEC: {
1761 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1762 [MANAGER_REBOOT] = "reboot",
1763 [MANAGER_POWEROFF] = "poweroff",
1764 [MANAGER_HALT] = "halt",
1765 [MANAGER_KEXEC] = "kexec"
1768 assert_se(shutdown_verb = table[m->exit_code]);
1769 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1771 log_notice("Shutting down.");
1776 assert_not_reached("Unknown exit code.");
1784 for (j = 0; j < RLIMIT_NLIMITS; j++)
1785 free(arg_default_rlimit[j]);
1787 free(arg_default_unit);
1788 strv_free(arg_default_controllers);
1789 free_join_controllers();
1796 unsigned i, args_size;
1798 /* Close and disarm the watchdog, so that the new
1799 * instance can reinitialize it, but doesn't get
1800 * rebooted while we do that */
1801 watchdog_close(true);
1803 /* Reset the RLIMIT_NOFILE to the kernel default, so
1804 * that the new systemd can pass the kernel default to
1805 * its child processes */
1806 if (saved_rlimit_nofile.rlim_cur > 0)
1807 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1809 if (switch_root_dir) {
1810 /* Kill all remaining processes from the
1811 * initrd, but don't wait for them, so that we
1812 * can handle the SIGCHLD for them after
1814 broadcast_signal(SIGTERM, false);
1816 /* And switch root */
1817 r = switch_root(switch_root_dir);
1819 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1822 args_size = MAX(6, argc+1);
1823 args = newa(const char*, args_size);
1825 if (!switch_root_init) {
1828 /* First try to spawn ourselves with the right
1829 * path, and with full serialization. We do
1830 * this only if the user didn't specify an
1831 * explicit init to spawn. */
1833 assert(serialization);
1836 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1840 args[i++] = SYSTEMD_BINARY_PATH;
1841 if (switch_root_dir)
1842 args[i++] = "--switched-root";
1843 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1844 args[i++] = "--deserialize";
1848 assert(i <= args_size);
1849 execv(args[0], (char* const*) args);
1852 /* Try the fallback, if there is any, without any
1853 * serialization. We pass the original argv[] and
1854 * envp[]. (Well, modulo the ordering changes due to
1855 * getopt() in argv[], and some cleanups in envp[],
1856 * but let's hope that doesn't matter.) */
1858 if (serialization) {
1859 fclose(serialization);
1860 serialization = NULL;
1868 /* Reopen the console */
1869 make_console_stdio();
1871 for (j = 1, i = 1; j < argc; j++)
1872 args[i++] = argv[j];
1874 assert(i <= args_size);
1876 if (switch_root_init) {
1877 args[0] = switch_root_init;
1878 execv(args[0], (char* const*) args);
1879 log_warning("Failed to execute configured init, trying fallback: %m");
1882 args[0] = "/sbin/init";
1883 execv(args[0], (char* const*) args);
1885 if (errno == ENOENT) {
1886 log_warning("No /sbin/init, trying fallback");
1888 args[0] = "/bin/sh";
1890 execv(args[0], (char* const*) args);
1891 log_error("Failed to execute /bin/sh, giving up: %m");
1893 log_warning("Failed to execute /sbin/init, giving up: %m");
1897 fclose(serialization);
1902 if (shutdown_verb) {
1903 const char * command_line[] = {
1904 SYSTEMD_SHUTDOWN_BINARY_PATH,
1910 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1913 /* If we reboot let's set the shutdown
1914 * watchdog and tell the shutdown binary to
1915 * repeatedly ping it */
1916 watchdog_set_timeout(&arg_shutdown_watchdog);
1917 watchdog_close(false);
1919 /* Tell the binary how often to ping */
1920 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1923 env_block = strv_append(environ, e);
1925 env_block = strv_copy(environ);
1926 watchdog_close(true);
1929 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1931 log_error("Failed to execute shutdown binary, freezing: %m");