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 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 _cleanup_fclose_ FILE *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 _cleanup_free_ char *line = NULL;
696 /* Don't read /proc/cmdline if we are in a container, since
697 * that is only relevant for the host system */
698 if (detect_container(NULL) > 0)
701 r = read_one_line_file("/proc/cmdline", &line);
703 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
707 FOREACH_WORD_QUOTED(w, l, line, state) {
708 _cleanup_free_ char *word;
710 word = strndup(w, l);
714 r = parse_proc_cmdline_word(word);
716 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
724 static int parse_argv(int argc, char *argv[]) {
727 ARG_LOG_LEVEL = 0x100,
736 ARG_DUMP_CONFIGURATION_ITEMS,
744 ARG_DEFAULT_STD_OUTPUT,
745 ARG_DEFAULT_STD_ERROR
748 static const struct option options[] = {
749 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
750 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
751 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
752 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
753 { "unit", required_argument, NULL, ARG_UNIT },
754 { "system", no_argument, NULL, ARG_SYSTEM },
755 { "user", no_argument, NULL, ARG_USER },
756 { "test", no_argument, NULL, ARG_TEST },
757 { "help", no_argument, NULL, 'h' },
758 { "version", no_argument, NULL, ARG_VERSION },
759 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
760 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
761 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
762 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
763 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
764 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
765 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
766 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
767 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
768 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
780 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
785 if ((r = log_set_max_level_from_string(optarg)) < 0) {
786 log_error("Failed to parse log level %s.", optarg);
794 if ((r = log_set_target_from_string(optarg)) < 0) {
795 log_error("Failed to parse log target %s.", optarg);
804 if ((r = log_show_color_from_string(optarg)) < 0) {
805 log_error("Failed to parse log color setting %s.", optarg);
809 log_show_color(true);
813 case ARG_LOG_LOCATION:
816 if ((r = log_show_location_from_string(optarg)) < 0) {
817 log_error("Failed to parse log location setting %s.", optarg);
821 log_show_location(true);
825 case ARG_DEFAULT_STD_OUTPUT:
827 if ((r = exec_output_from_string(optarg)) < 0) {
828 log_error("Failed to parse default standard output setting %s.", optarg);
831 arg_default_std_output = r;
834 case ARG_DEFAULT_STD_ERROR:
836 if ((r = exec_output_from_string(optarg)) < 0) {
837 log_error("Failed to parse default standard error output setting %s.", optarg);
840 arg_default_std_error = r;
845 if ((r = set_default_unit(optarg)) < 0) {
846 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
853 arg_running_as = SYSTEMD_SYSTEM;
857 arg_running_as = SYSTEMD_USER;
861 arg_action = ACTION_TEST;
865 arg_action = ACTION_VERSION;
868 case ARG_DUMP_CONFIGURATION_ITEMS:
869 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
873 r = optarg ? parse_boolean(optarg) : 1;
875 log_error("Failed to parse dump core boolean %s.", optarg);
881 case ARG_CRASH_SHELL:
882 r = optarg ? parse_boolean(optarg) : 1;
884 log_error("Failed to parse crash shell boolean %s.", optarg);
890 case ARG_CONFIRM_SPAWN:
891 r = optarg ? parse_boolean(optarg) : 1;
893 log_error("Failed to parse confirm spawn boolean %s.", optarg);
896 arg_confirm_spawn = r;
899 case ARG_SHOW_STATUS:
900 r = optarg ? parse_boolean(optarg) : 1;
902 log_error("Failed to parse show status boolean %s.", optarg);
908 case ARG_DESERIALIZE: {
912 r = safe_atoi(optarg, &fd);
913 if (r < 0 || fd < 0) {
914 log_error("Failed to parse deserialize option %s.", optarg);
915 return r < 0 ? r : -EINVAL;
918 fd_cloexec(fd, true);
922 log_error("Failed to open serialization fd: %m");
927 fclose(serialization);
934 case ARG_SWITCHED_ROOT:
935 arg_switched_root = true;
938 case ARG_INTROSPECT: {
939 const char * const * i = NULL;
941 for (i = bus_interface_table; *i; i += 2)
942 if (!optarg || streq(i[0], optarg)) {
943 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
946 fputs("</node>\n", stdout);
953 log_error("Unknown interface %s.", optarg);
955 arg_action = ACTION_DONE;
960 arg_action = ACTION_HELP;
964 log_set_max_level(LOG_DEBUG);
970 /* Just to eat away the sysvinit kernel
971 * cmdline args without getopt() error
972 * messages that we'll parse in
973 * parse_proc_cmdline_word() or ignore. */
978 log_error("Unknown option code %c", c);
985 if (optind < argc && getpid() != 1) {
986 /* Hmm, when we aren't run as init system
987 * let's complain about excess arguments */
989 log_error("Excess arguments.");
993 if (detect_container(NULL) > 0) {
996 /* All /proc/cmdline arguments the kernel didn't
997 * understand it passed to us. We're not really
998 * interested in that usually since /proc/cmdline is
999 * more interesting and complete. With one exception:
1000 * if we are run in a container /proc/cmdline is not
1001 * relevant for the container, hence we rely on argv[]
1004 for (a = argv; a < argv + argc; a++)
1005 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1006 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1014 static int help(void) {
1016 printf("%s [OPTIONS...]\n\n"
1017 "Starts up and maintains the system or user services.\n\n"
1018 " -h --help Show this help\n"
1019 " --test Determine startup sequence, dump it and exit\n"
1020 " --dump-configuration-items Dump understood unit configuration items\n"
1021 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1022 " --unit=UNIT Set default unit\n"
1023 " --system Run a system instance, even if PID != 1\n"
1024 " --user Run a user instance\n"
1025 " --dump-core[=0|1] Dump core on crash\n"
1026 " --crash-shell[=0|1] Run shell on crash\n"
1027 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1028 " --show-status[=0|1] Show status updates on the console during bootup\n"
1029 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1030 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1031 " --log-color[=0|1] Highlight important log messages\n"
1032 " --log-location[=0|1] Include code location in log messages\n"
1033 " --default-standard-output= Set default standard output for services\n"
1034 " --default-standard-error= Set default standard error output for services\n",
1035 program_invocation_short_name);
1040 static int version(void) {
1041 puts(PACKAGE_STRING);
1042 puts(SYSTEMD_FEATURES);
1047 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1056 /* Make sure nothing is really destructed when we shut down */
1059 r = manager_open_serialization(m, &f);
1061 log_error("Failed to create serialization file: %s", strerror(-r));
1068 log_error("Failed to allocate fd set: %s", strerror(-r));
1072 r = manager_serialize(m, f, fds, switching_root);
1074 log_error("Failed to serialize state: %s", strerror(-r));
1078 if (fseeko(f, 0, SEEK_SET) < 0) {
1079 log_error("Failed to rewind serialization fd: %m");
1083 r = fd_cloexec(fileno(f), false);
1085 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1089 r = fdset_cloexec(fds, false);
1091 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1109 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1113 assert(saved_rlimit);
1115 /* Save the original RLIMIT_NOFILE so that we can reset it
1116 * later when transitioning from the initrd to the main
1117 * systemd or suchlike. */
1118 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1119 log_error("Reading RLIMIT_NOFILE failed: %m");
1123 /* Make sure forked processes get the default kernel setting */
1124 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1127 rl = newdup(struct rlimit, saved_rlimit, 1);
1131 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1134 /* Bump up the resource limit for ourselves substantially */
1135 nl.rlim_cur = nl.rlim_max = 64*1024;
1136 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1138 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1145 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1147 unsigned long long a, b;
1151 e = getenv("RD_TIMESTAMP");
1155 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1158 t->realtime = (usec_t) a;
1159 t->monotonic = (usec_t) b;
1164 static void test_mtab(void) {
1167 /* Check that /etc/mtab is a symlink */
1169 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1172 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1179 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1180 "This is not supported anymore. "
1181 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1184 static void test_usr(void) {
1186 /* Check that /usr is not a separate fs */
1188 if (dir_is_empty("/usr") <= 0)
1191 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1192 "Some things will probably break (sometimes even silently) in mysterious ways. "
1193 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1196 static void test_cgroups(void) {
1198 if (access("/proc/cgroups", F_OK) >= 0)
1201 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1202 "Systems without control groups are not supported. "
1203 "We will now sleep for 10s, and then continue boot-up. "
1204 "Expect breakage and please do not file bugs. "
1205 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1206 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1211 static int initialize_join_controllers(void) {
1212 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1213 * + "net_prio". We'd like to add "cpuset" to the mix, but
1214 * "cpuset" does't really work for groups with no initialized
1217 arg_join_controllers = new(char**, 3);
1218 if (!arg_join_controllers)
1221 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1222 if (!arg_join_controllers[0])
1225 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1226 if (!arg_join_controllers[1])
1229 arg_join_controllers[2] = NULL;
1233 int main(int argc, char *argv[]) {
1235 int r, retval = EXIT_FAILURE;
1236 usec_t before_startup, after_startup;
1237 char timespan[FORMAT_TIMESPAN_MAX];
1239 bool reexecute = false;
1240 const char *shutdown_verb = NULL;
1241 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1242 static char systemd[] = "systemd";
1243 bool skip_setup = false;
1245 bool loaded_policy = false;
1246 bool arm_reboot_watchdog = false;
1247 bool queue_default_job = false;
1248 char *switch_root_dir = NULL, *switch_root_init = NULL;
1249 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1251 #ifdef HAVE_SYSV_COMPAT
1252 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1253 /* This is compatibility support for SysV, where
1254 * calling init as a user is identical to telinit. */
1257 execv(SYSTEMCTL_BINARY_PATH, argv);
1258 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1263 /* Determine if this is a reexecution or normal bootup. We do
1264 * the full command line parsing much later, so let's just
1265 * have a quick peek here. */
1266 if (strv_find(argv+1, "--deserialize"))
1269 /* If we have switched root, do all the special setup
1271 if (strv_find(argv+1, "--switched-root"))
1274 /* If we get started via the /sbin/init symlink then we are
1275 called 'init'. After a subsequent reexecution we are then
1276 called 'systemd'. That is confusing, hence let's call us
1277 systemd right-away. */
1278 program_invocation_short_name = systemd;
1279 prctl(PR_SET_NAME, systemd);
1284 log_show_color(isatty(STDERR_FILENO) > 0);
1286 if (getpid() == 1 && detect_container(NULL) <= 0) {
1288 /* Running outside of a container as PID 1 */
1289 arg_running_as = SYSTEMD_SYSTEM;
1291 log_set_target(LOG_TARGET_KMSG);
1295 char *rd_timestamp = NULL;
1297 dual_timestamp_get(&initrd_timestamp);
1298 asprintf(&rd_timestamp, "%llu %llu",
1299 (unsigned long long) initrd_timestamp.realtime,
1300 (unsigned long long) initrd_timestamp.monotonic);
1302 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1308 mount_setup_early();
1309 if (selinux_setup(&loaded_policy) < 0)
1311 if (ima_setup() < 0)
1313 if (smack_setup() < 0)
1317 if (label_init(NULL) < 0)
1321 if (hwclock_is_localtime() > 0) {
1324 /* The first-time call to settimeofday() does a time warp in the kernel */
1325 r = hwclock_set_timezone(&min);
1327 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1329 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1330 } else if (!in_initrd()) {
1332 * Do dummy first-time call to seal the kernel's time warp magic
1334 * Do not call this this from inside the initrd. The initrd might not
1335 * carry /etc/adjtime with LOCAL, but the real system could be set up
1336 * that way. In such case, we need to delay the time-warp or the sealing
1337 * until we reach the real system.
1339 hwclock_reset_timezone();
1341 /* Tell the kernel our time zone */
1342 r = hwclock_set_timezone(NULL);
1344 log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
1348 /* Set the default for later on, but don't actually
1349 * open the logs like this for now. Note that if we
1350 * are transitioning from the initrd there might still
1351 * be journal fd open, and we shouldn't attempt
1352 * opening that before we parsed /proc/cmdline which
1353 * might redirect output elsewhere. */
1354 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1356 } else if (getpid() == 1) {
1358 /* Running inside a container, as PID 1 */
1359 arg_running_as = SYSTEMD_SYSTEM;
1360 log_set_target(LOG_TARGET_CONSOLE);
1363 /* For the later on, see above... */
1364 log_set_target(LOG_TARGET_JOURNAL);
1368 /* Running as user instance */
1369 arg_running_as = SYSTEMD_USER;
1370 log_set_target(LOG_TARGET_AUTO);
1374 /* Initialize default unit */
1375 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1377 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1381 r = initialize_join_controllers();
1385 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1386 * /proc/$PID/fd is available. */
1387 if (getpid() == 1) {
1388 r = mount_setup(loaded_policy);
1393 /* Reset all signal handlers. */
1394 assert_se(reset_all_signal_handlers() == 0);
1396 /* If we are init, we can block sigkill. Yay. */
1397 ignore_signals(SIGNALS_IGNORE, -1);
1399 if (parse_config_file() < 0)
1402 if (arg_running_as == SYSTEMD_SYSTEM)
1403 if (parse_proc_cmdline() < 0)
1406 log_parse_environment();
1408 if (parse_argv(argc, argv) < 0)
1411 if (arg_action == ACTION_TEST &&
1413 log_error("Don't run test mode as root.");
1417 if (arg_running_as == SYSTEMD_USER &&
1418 arg_action == ACTION_RUN &&
1420 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1424 if (arg_running_as == SYSTEMD_SYSTEM &&
1425 arg_action == ACTION_RUN &&
1426 running_in_chroot() > 0) {
1427 log_error("Cannot be run in a chroot() environment.");
1431 if (arg_action == ACTION_HELP) {
1434 } else if (arg_action == ACTION_VERSION) {
1437 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1438 unit_dump_config_items(stdout);
1439 retval = EXIT_SUCCESS;
1441 } else if (arg_action == ACTION_DONE) {
1442 retval = EXIT_SUCCESS;
1446 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1448 /* Close logging fds, in order not to confuse fdset below */
1451 /* Remember open file descriptors for later deserialization */
1452 r = fdset_new_fill(&fds);
1454 log_error("Failed to allocate fd set: %s", strerror(-r));
1457 fdset_cloexec(fds, true);
1460 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1462 /* Set up PATH unless it is already set */
1464 #ifdef HAVE_SPLIT_USR
1465 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1467 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1469 arg_running_as == SYSTEMD_SYSTEM);
1471 if (arg_running_as == SYSTEMD_SYSTEM) {
1472 /* Parse the data passed to us. We leave this
1473 * variables set, but the manager later on will not
1474 * pass them on to our children. */
1476 parse_initrd_timestamp(&initrd_timestamp);
1478 /* Unset some environment variables passed in from the
1479 * kernel that don't really make sense for us. */
1483 /* When we are invoked by a shell, these might be set,
1484 * but make little sense to pass on */
1489 /* When we are invoked by a chroot-like tool such as
1490 * nspawn, these might be set, but make little sense
1493 unsetenv("LOGNAME");
1495 /* We suppress the socket activation env vars, as
1496 * we'll try to match *any* open fd to units if
1498 unsetenv("LISTEN_FDS");
1499 unsetenv("LISTEN_PID");
1501 /* All other variables are left as is, so that clients
1502 * can still read them via /proc/1/environ */
1505 /* Move out of the way, so that we won't block unmounts */
1506 assert_se(chdir("/") == 0);
1508 if (arg_running_as == SYSTEMD_SYSTEM) {
1509 /* Become a session leader if we aren't one yet. */
1512 /* Disable the umask logic */
1516 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1517 dbus_connection_set_change_sigpipe(FALSE);
1519 /* Reset the console, but only if this is really init and we
1520 * are freshly booted */
1521 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1522 console_setup(getpid() == 1 && !skip_setup);
1524 /* Open the logging devices, if possible and necessary */
1527 /* Make sure we leave a core dump without panicing the
1529 if (getpid() == 1) {
1530 install_crash_handler();
1532 r = mount_cgroup_controllers(arg_join_controllers);
1537 if (arg_running_as == SYSTEMD_SYSTEM) {
1538 const char *virtualization = NULL;
1540 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1542 detect_virtualization(&virtualization);
1544 log_info("Detected virtualization '%s'.", virtualization);
1547 log_info("Running in initial RAM disk.");
1550 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1552 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1555 if (arg_show_status || plymouth_running())
1570 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1571 watchdog_set_timeout(&arg_runtime_watchdog);
1573 if (arg_timer_slack_nsec != (nsec_t) -1)
1574 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1575 log_error("Failed to adjust timer slack: %m");
1577 if (arg_capability_bounding_set_drop) {
1578 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1580 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1583 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1585 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1590 if (arg_running_as == SYSTEMD_USER) {
1591 /* Become reaper of our children */
1592 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1593 log_warning("Failed to make us a subreaper: %m");
1594 if (errno == EINVAL)
1595 log_info("Perhaps the kernel version is too old (< 3.4?)");
1599 if (arg_running_as == SYSTEMD_SYSTEM)
1600 bump_rlimit_nofile(&saved_rlimit_nofile);
1602 r = manager_new(arg_running_as, &m);
1604 log_error("Failed to allocate manager object: %s", strerror(-r));
1608 m->confirm_spawn = arg_confirm_spawn;
1609 m->default_std_output = arg_default_std_output;
1610 m->default_std_error = arg_default_std_error;
1611 m->runtime_watchdog = arg_runtime_watchdog;
1612 m->shutdown_watchdog = arg_shutdown_watchdog;
1614 manager_set_default_rlimits(m, arg_default_rlimit);
1616 if (dual_timestamp_is_set(&initrd_timestamp))
1617 m->initrd_timestamp = initrd_timestamp;
1619 if (arg_default_controllers)
1620 manager_set_default_controllers(m, arg_default_controllers);
1622 manager_set_show_status(m, arg_show_status);
1624 /* Remember whether we should queue the default job */
1625 queue_default_job = !serialization || arg_switched_root;
1627 before_startup = now(CLOCK_MONOTONIC);
1629 r = manager_startup(m, serialization, fds);
1631 log_error("Failed to fully start up daemon: %s", strerror(-r));
1633 /* This will close all file descriptors that were opened, but
1634 * not claimed by any unit. */
1637 if (serialization) {
1638 fclose(serialization);
1639 serialization = NULL;
1642 if (queue_default_job) {
1644 Unit *target = NULL;
1645 Job *default_unit_job;
1647 dbus_error_init(&error);
1649 log_debug("Activating default unit: %s", arg_default_unit);
1651 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1653 log_error("Failed to load default target: %s", bus_error(&error, r));
1654 dbus_error_free(&error);
1655 } else if (target->load_state == UNIT_ERROR)
1656 log_error("Failed to load default target: %s", strerror(-target->load_error));
1657 else if (target->load_state == UNIT_MASKED)
1658 log_error("Default target masked.");
1660 if (!target || target->load_state != UNIT_LOADED) {
1661 log_info("Trying to load rescue target...");
1663 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1665 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1666 dbus_error_free(&error);
1668 } else if (target->load_state == UNIT_ERROR) {
1669 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1671 } else if (target->load_state == UNIT_MASKED) {
1672 log_error("Rescue target masked.");
1677 assert(target->load_state == UNIT_LOADED);
1679 if (arg_action == ACTION_TEST) {
1680 printf("-> By units:\n");
1681 manager_dump_units(m, stdout, "\t");
1684 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1686 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1687 dbus_error_free(&error);
1689 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1691 log_error("Failed to start default target: %s", bus_error(&error, r));
1692 dbus_error_free(&error);
1696 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1697 dbus_error_free(&error);
1701 m->default_unit_job_id = default_unit_job->id;
1703 after_startup = now(CLOCK_MONOTONIC);
1704 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1705 "Loaded units and determined initial transaction in %s.",
1706 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1708 if (arg_action == ACTION_TEST) {
1709 printf("-> By jobs:\n");
1710 manager_dump_jobs(m, stdout, "\t");
1711 retval = EXIT_SUCCESS;
1717 r = manager_loop(m);
1719 log_error("Failed to run mainloop: %s", strerror(-r));
1723 switch (m->exit_code) {
1726 retval = EXIT_SUCCESS;
1730 case MANAGER_RELOAD:
1731 log_info("Reloading.");
1732 r = manager_reload(m);
1734 log_error("Failed to reload: %s", strerror(-r));
1737 case MANAGER_REEXECUTE:
1739 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1743 log_notice("Reexecuting.");
1746 case MANAGER_SWITCH_ROOT:
1747 /* Steal the switch root parameters */
1748 switch_root_dir = m->switch_root;
1749 switch_root_init = m->switch_root_init;
1750 m->switch_root = m->switch_root_init = NULL;
1752 if (!switch_root_init)
1753 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1757 log_notice("Switching root.");
1760 case MANAGER_REBOOT:
1761 case MANAGER_POWEROFF:
1763 case MANAGER_KEXEC: {
1764 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1765 [MANAGER_REBOOT] = "reboot",
1766 [MANAGER_POWEROFF] = "poweroff",
1767 [MANAGER_HALT] = "halt",
1768 [MANAGER_KEXEC] = "kexec"
1771 assert_se(shutdown_verb = table[m->exit_code]);
1772 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1774 log_notice("Shutting down.");
1779 assert_not_reached("Unknown exit code.");
1787 for (j = 0; j < RLIMIT_NLIMITS; j++)
1788 free(arg_default_rlimit[j]);
1790 free(arg_default_unit);
1791 strv_free(arg_default_controllers);
1792 free_join_controllers();
1799 unsigned i, args_size;
1801 /* Close and disarm the watchdog, so that the new
1802 * instance can reinitialize it, but doesn't get
1803 * rebooted while we do that */
1804 watchdog_close(true);
1806 /* Reset the RLIMIT_NOFILE to the kernel default, so
1807 * that the new systemd can pass the kernel default to
1808 * its child processes */
1809 if (saved_rlimit_nofile.rlim_cur > 0)
1810 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1812 if (switch_root_dir) {
1813 /* Kill all remaining processes from the
1814 * initrd, but don't wait for them, so that we
1815 * can handle the SIGCHLD for them after
1817 broadcast_signal(SIGTERM, false);
1819 /* And switch root */
1820 r = switch_root(switch_root_dir);
1822 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1825 args_size = MAX(6, argc+1);
1826 args = newa(const char*, args_size);
1828 if (!switch_root_init) {
1831 /* First try to spawn ourselves with the right
1832 * path, and with full serialization. We do
1833 * this only if the user didn't specify an
1834 * explicit init to spawn. */
1836 assert(serialization);
1839 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1843 args[i++] = SYSTEMD_BINARY_PATH;
1844 if (switch_root_dir)
1845 args[i++] = "--switched-root";
1846 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1847 args[i++] = "--deserialize";
1851 assert(i <= args_size);
1852 execv(args[0], (char* const*) args);
1855 /* Try the fallback, if there is any, without any
1856 * serialization. We pass the original argv[] and
1857 * envp[]. (Well, modulo the ordering changes due to
1858 * getopt() in argv[], and some cleanups in envp[],
1859 * but let's hope that doesn't matter.) */
1861 if (serialization) {
1862 fclose(serialization);
1863 serialization = NULL;
1871 /* Reopen the console */
1872 make_console_stdio();
1874 for (j = 1, i = 1; j < argc; j++)
1875 args[i++] = argv[j];
1877 assert(i <= args_size);
1879 if (switch_root_init) {
1880 args[0] = switch_root_init;
1881 execv(args[0], (char* const*) args);
1882 log_warning("Failed to execute configured init, trying fallback: %m");
1885 args[0] = "/sbin/init";
1886 execv(args[0], (char* const*) args);
1888 if (errno == ENOENT) {
1889 log_warning("No /sbin/init, trying fallback");
1891 args[0] = "/bin/sh";
1893 execv(args[0], (char* const*) args);
1894 log_error("Failed to execute /bin/sh, giving up: %m");
1896 log_warning("Failed to execute /sbin/init, giving up: %m");
1900 fclose(serialization);
1905 if (shutdown_verb) {
1906 const char * command_line[] = {
1907 SYSTEMD_SHUTDOWN_BINARY_PATH,
1913 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1916 /* If we reboot let's set the shutdown
1917 * watchdog and tell the shutdown binary to
1918 * repeatedly ping it */
1919 watchdog_set_timeout(&arg_shutdown_watchdog);
1920 watchdog_close(false);
1922 /* Tell the binary how often to ping */
1923 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1926 env_block = strv_append(environ, e);
1928 env_block = strv_copy(environ);
1929 watchdog_close(true);
1932 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1934 log_error("Failed to execute shutdown binary, freezing: %m");