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_join_controllers = NULL;
92 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
93 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
94 static usec_t arg_runtime_watchdog = 0;
95 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
96 static char **arg_default_environment = NULL;
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 /* Pass this on immediately, if this is not PID 1 */
111 else if (!arg_dump_core)
112 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
114 struct sigaction sa = {
115 .sa_handler = nop_handler,
116 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
120 /* We want to wait for the core process, hence let's enable SIGCHLD */
121 sigaction(SIGCHLD, &sa, NULL);
125 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
128 struct rlimit rl = {};
130 /* Enable default signal handler for core dump */
132 sa.sa_handler = SIG_DFL;
133 sigaction(sig, &sa, NULL);
135 /* Don't limit the core dump size */
136 rl.rlim_cur = RLIM_INFINITY;
137 rl.rlim_max = RLIM_INFINITY;
138 setrlimit(RLIMIT_CORE, &rl);
140 /* Just to be sure... */
143 /* Raise the signal again */
146 assert_not_reached("We shouldn't be here...");
153 /* Order things nicely. */
154 r = wait_for_terminate(pid, &status);
156 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
157 else if (status.si_code != CLD_DUMPED)
158 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
160 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
165 chvt(arg_crash_chvt);
167 if (arg_crash_shell) {
168 struct sigaction sa = {
169 .sa_handler = SIG_IGN,
170 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
174 log_info("Executing crash shell in 10s...");
177 /* Let the kernel reap children for us */
178 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
182 log_error("Failed to fork off crash shell: %m");
184 make_console_stdio();
185 execl("/bin/sh", "/bin/sh", NULL);
187 log_error("execl() failed: %m");
191 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
194 log_info("Freezing execution.");
198 static void install_crash_handler(void) {
199 struct sigaction sa = {
201 .sa_flags = SA_NODEFER,
204 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
207 static int console_setup(bool do_reset) {
210 /* If we are init, we connect stdin/stdout/stderr to /dev/null
211 * and make sure we don't have a controlling tty. */
218 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
220 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
224 /* We don't want to force text mode.
225 * plymouth may be showing pictures already from initrd. */
226 r = reset_terminal_fd(tty_fd, false);
228 log_error("Failed to reset /dev/console: %s", strerror(-r));
230 close_nointr_nofail(tty_fd);
234 static int set_default_unit(const char *u) {
243 free(arg_default_unit);
244 arg_default_unit = c;
249 static int parse_proc_cmdline_word(const char *word) {
251 static const char * const rlmap[] = {
252 "emergency", SPECIAL_EMERGENCY_TARGET,
253 "-b", SPECIAL_EMERGENCY_TARGET,
254 "single", SPECIAL_RESCUE_TARGET,
255 "-s", SPECIAL_RESCUE_TARGET,
256 "s", SPECIAL_RESCUE_TARGET,
257 "S", SPECIAL_RESCUE_TARGET,
258 "1", SPECIAL_RESCUE_TARGET,
259 "2", SPECIAL_RUNLEVEL2_TARGET,
260 "3", SPECIAL_RUNLEVEL3_TARGET,
261 "4", SPECIAL_RUNLEVEL4_TARGET,
262 "5", SPECIAL_RUNLEVEL5_TARGET,
267 if (startswith(word, "systemd.unit=")) {
270 return set_default_unit(word + 13);
272 } else if (startswith(word, "rd.systemd.unit=")) {
275 return set_default_unit(word + 16);
277 } else if (startswith(word, "systemd.log_target=")) {
279 if (log_set_target_from_string(word + 19) < 0)
280 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
282 } else if (startswith(word, "systemd.log_level=")) {
284 if (log_set_max_level_from_string(word + 18) < 0)
285 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
287 } else if (startswith(word, "systemd.log_color=")) {
289 if (log_show_color_from_string(word + 18) < 0)
290 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
292 } else if (startswith(word, "systemd.log_location=")) {
294 if (log_show_location_from_string(word + 21) < 0)
295 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
297 } else if (startswith(word, "systemd.dump_core=")) {
300 if ((r = parse_boolean(word + 18)) < 0)
301 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
305 } else if (startswith(word, "systemd.crash_shell=")) {
308 if ((r = parse_boolean(word + 20)) < 0)
309 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
313 } else if (startswith(word, "systemd.confirm_spawn=")) {
316 if ((r = parse_boolean(word + 22)) < 0)
317 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
319 arg_confirm_spawn = r;
321 } else if (startswith(word, "systemd.crash_chvt=")) {
324 if (safe_atoi(word + 19, &k) < 0)
325 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
329 } else if (startswith(word, "systemd.show_status=")) {
332 if ((r = parse_boolean(word + 20)) < 0)
333 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
336 } else if (startswith(word, "systemd.default_standard_output=")) {
339 if ((r = exec_output_from_string(word + 32)) < 0)
340 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
342 arg_default_std_output = r;
343 } else if (startswith(word, "systemd.default_standard_error=")) {
346 if ((r = exec_output_from_string(word + 31)) < 0)
347 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
349 arg_default_std_error = r;
350 } else if (startswith(word, "systemd.setenv=")) {
351 _cleanup_free_ char *cenv = NULL;
355 cenv = strdup(word + 15);
359 eq = strchr(cenv, '=');
361 if (!env_name_is_valid(cenv))
362 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
366 log_warning("Unsetting environment variable '%s' failed, ignoring: %m", cenv);
369 if (!env_assignment_is_valid(cenv))
370 log_warning("Environment variable assignment '%s' is not valid. Ignoring.", cenv);
373 r = setenv(cenv, eq + 1, 1);
375 log_warning("Setting environment variable '%s=%s' failed, ignoring: %m", cenv, eq + 1);
379 } else if (startswith(word, "systemd.") ||
380 (in_initrd() && startswith(word, "rd.systemd."))) {
384 /* Ignore systemd.journald.xyz and friends */
386 if (startswith(c, "rd."))
388 if (startswith(c, "systemd."))
390 if (c[strcspn(c, ".=")] != '.') {
392 log_warning("Unknown kernel switch %s. Ignoring.", word);
394 log_info("Supported kernel switches:\n"
395 "systemd.unit=UNIT Default unit to start\n"
396 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
397 "systemd.dump_core=0|1 Dump core on crash\n"
398 "systemd.crash_shell=0|1 Run shell on crash\n"
399 "systemd.crash_chvt=N Change to VT #N on crash\n"
400 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
401 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
402 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
404 "systemd.log_level=LEVEL Log level\n"
405 "systemd.log_color=0|1 Highlight important log messages\n"
406 "systemd.log_location=0|1 Include code location in log messages\n"
407 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
408 " Set default log output for services\n"
409 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
410 " Set default log error output for services\n"
411 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
414 } else if (streq(word, "quiet"))
415 arg_show_status = false;
416 else if (streq(word, "debug"))
417 log_set_max_level(LOG_DEBUG);
418 else if (!in_initrd()) {
421 /* SysV compatibility */
422 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
423 if (streq(word, rlmap[i]))
424 return set_default_unit(rlmap[i+1]);
430 #define DEFINE_SETTER(name, func, descr) \
431 static int name(const char *unit, \
432 const char *filename, \
434 const char *section, \
435 const char *lvalue, \
437 const char *rvalue, \
449 log_syntax(unit, LOG_ERR, filename, line, -r, \
450 "Invalid " descr "'%s': %s", \
451 rvalue, strerror(-r)); \
456 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
457 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
458 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
459 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
462 static int config_parse_cpu_affinity2(const char *unit,
463 const char *filename,
482 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
487 if (!(t = strndup(w, l)))
490 r = safe_atou(t, &cpu);
494 if (!(c = cpu_set_malloc(&ncpus)))
497 if (r < 0 || cpu >= ncpus) {
498 log_syntax(unit, LOG_ERR, filename, line, -r,
499 "Failed to parse CPU affinity '%s'", rvalue);
504 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
508 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
509 log_warning_unit(unit, "Failed to set CPU affinity: %m");
517 static void strv_free_free(char ***l) {
529 static void free_join_controllers(void) {
530 strv_free_free(arg_join_controllers);
531 arg_join_controllers = NULL;
534 static int config_parse_join_controllers(const char *unit,
535 const char *filename,
552 free_join_controllers();
554 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
557 s = strndup(w, length);
561 l = strv_split(s, ",");
566 if (strv_length(l) <= 1) {
571 if (!arg_join_controllers) {
572 arg_join_controllers = new(char**, 2);
573 if (!arg_join_controllers) {
578 arg_join_controllers[0] = l;
579 arg_join_controllers[1] = NULL;
586 t = new0(char**, n+2);
594 for (a = arg_join_controllers; *a; a++) {
596 if (strv_overlap(*a, l)) {
599 c = strv_merge(*a, l);
622 t[n++] = strv_uniq(l);
624 strv_free_free(arg_join_controllers);
625 arg_join_controllers = t;
632 static int parse_config_file(void) {
634 const ConfigTableItem items[] = {
635 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
636 { "Manager", "LogTarget", config_parse_target, 0, NULL },
637 { "Manager", "LogColor", config_parse_color, 0, NULL },
638 { "Manager", "LogLocation", config_parse_location, 0, NULL },
639 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
640 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
641 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
642 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
643 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
644 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
645 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
646 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
647 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
648 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
649 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
650 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
651 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
652 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU]},
653 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE]},
654 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA]},
655 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK]},
656 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE]},
657 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS]},
658 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE]},
659 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS]},
660 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC]},
661 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK]},
662 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS]},
663 { "Manager", "DefaultLimitSIGPENDING",config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING]},
664 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE]},
665 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE]},
666 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO]},
667 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME]},
668 { NULL, NULL, NULL, 0, NULL }
671 _cleanup_fclose_ FILE *f;
675 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
681 log_warning("Failed to open configuration file '%s': %m", fn);
685 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
687 log_warning("Failed to parse configuration file: %s", strerror(-r));
692 static int parse_proc_cmdline(void) {
693 _cleanup_free_ char *line = NULL;
698 /* Don't read /proc/cmdline if we are in a container, since
699 * that is only relevant for the host system */
700 if (detect_container(NULL) > 0)
703 r = read_one_line_file("/proc/cmdline", &line);
705 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
709 FOREACH_WORD_QUOTED(w, l, line, state) {
710 _cleanup_free_ char *word;
712 word = strndup(w, l);
716 r = parse_proc_cmdline_word(word);
718 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
726 static int parse_argv(int argc, char *argv[]) {
729 ARG_LOG_LEVEL = 0x100,
738 ARG_DUMP_CONFIGURATION_ITEMS,
746 ARG_DEFAULT_STD_OUTPUT,
747 ARG_DEFAULT_STD_ERROR
750 static const struct option options[] = {
751 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
752 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
753 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
754 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
755 { "unit", required_argument, NULL, ARG_UNIT },
756 { "system", no_argument, NULL, ARG_SYSTEM },
757 { "user", no_argument, NULL, ARG_USER },
758 { "test", no_argument, NULL, ARG_TEST },
759 { "help", no_argument, NULL, 'h' },
760 { "version", no_argument, NULL, ARG_VERSION },
761 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
762 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
763 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
764 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
765 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
766 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
767 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
768 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
769 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
770 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
782 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
787 if ((r = log_set_max_level_from_string(optarg)) < 0) {
788 log_error("Failed to parse log level %s.", optarg);
796 if ((r = log_set_target_from_string(optarg)) < 0) {
797 log_error("Failed to parse log target %s.", optarg);
806 if ((r = log_show_color_from_string(optarg)) < 0) {
807 log_error("Failed to parse log color setting %s.", optarg);
811 log_show_color(true);
815 case ARG_LOG_LOCATION:
818 if ((r = log_show_location_from_string(optarg)) < 0) {
819 log_error("Failed to parse log location setting %s.", optarg);
823 log_show_location(true);
827 case ARG_DEFAULT_STD_OUTPUT:
829 if ((r = exec_output_from_string(optarg)) < 0) {
830 log_error("Failed to parse default standard output setting %s.", optarg);
833 arg_default_std_output = r;
836 case ARG_DEFAULT_STD_ERROR:
838 if ((r = exec_output_from_string(optarg)) < 0) {
839 log_error("Failed to parse default standard error output setting %s.", optarg);
842 arg_default_std_error = r;
847 if ((r = set_default_unit(optarg)) < 0) {
848 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
855 arg_running_as = SYSTEMD_SYSTEM;
859 arg_running_as = SYSTEMD_USER;
863 arg_action = ACTION_TEST;
867 arg_action = ACTION_VERSION;
870 case ARG_DUMP_CONFIGURATION_ITEMS:
871 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
875 r = optarg ? parse_boolean(optarg) : 1;
877 log_error("Failed to parse dump core boolean %s.", optarg);
883 case ARG_CRASH_SHELL:
884 r = optarg ? parse_boolean(optarg) : 1;
886 log_error("Failed to parse crash shell boolean %s.", optarg);
892 case ARG_CONFIRM_SPAWN:
893 r = optarg ? parse_boolean(optarg) : 1;
895 log_error("Failed to parse confirm spawn boolean %s.", optarg);
898 arg_confirm_spawn = r;
901 case ARG_SHOW_STATUS:
902 r = optarg ? parse_boolean(optarg) : 1;
904 log_error("Failed to parse show status boolean %s.", optarg);
910 case ARG_DESERIALIZE: {
914 r = safe_atoi(optarg, &fd);
915 if (r < 0 || fd < 0) {
916 log_error("Failed to parse deserialize option %s.", optarg);
917 return r < 0 ? r : -EINVAL;
920 fd_cloexec(fd, true);
924 log_error("Failed to open serialization fd: %m");
929 fclose(serialization);
936 case ARG_SWITCHED_ROOT:
937 arg_switched_root = true;
940 case ARG_INTROSPECT: {
941 const char * const * i = NULL;
943 for (i = bus_interface_table; *i; i += 2)
944 if (!optarg || streq(i[0], optarg)) {
945 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
948 fputs("</node>\n", stdout);
955 log_error("Unknown interface %s.", optarg);
957 arg_action = ACTION_DONE;
962 arg_action = ACTION_HELP;
966 log_set_max_level(LOG_DEBUG);
972 /* Just to eat away the sysvinit kernel
973 * cmdline args without getopt() error
974 * messages that we'll parse in
975 * parse_proc_cmdline_word() or ignore. */
980 log_error("Unknown option code %c", c);
987 if (optind < argc && getpid() != 1) {
988 /* Hmm, when we aren't run as init system
989 * let's complain about excess arguments */
991 log_error("Excess arguments.");
995 if (detect_container(NULL) > 0) {
998 /* All /proc/cmdline arguments the kernel didn't
999 * understand it passed to us. We're not really
1000 * interested in that usually since /proc/cmdline is
1001 * more interesting and complete. With one exception:
1002 * if we are run in a container /proc/cmdline is not
1003 * relevant for the container, hence we rely on argv[]
1006 for (a = argv; a < argv + argc; a++)
1007 if ((r = parse_proc_cmdline_word(*a)) < 0) {
1008 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
1016 static int help(void) {
1018 printf("%s [OPTIONS...]\n\n"
1019 "Starts up and maintains the system or user services.\n\n"
1020 " -h --help Show this help\n"
1021 " --test Determine startup sequence, dump it and exit\n"
1022 " --dump-configuration-items Dump understood unit configuration items\n"
1023 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1024 " --unit=UNIT Set default unit\n"
1025 " --system Run a system instance, even if PID != 1\n"
1026 " --user Run a user instance\n"
1027 " --dump-core[=0|1] Dump core on crash\n"
1028 " --crash-shell[=0|1] Run shell on crash\n"
1029 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1030 " --show-status[=0|1] Show status updates on the console during bootup\n"
1031 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1032 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1033 " --log-color[=0|1] Highlight important log messages\n"
1034 " --log-location[=0|1] Include code location in log messages\n"
1035 " --default-standard-output= Set default standard output for services\n"
1036 " --default-standard-error= Set default standard error output for services\n",
1037 program_invocation_short_name);
1042 static int version(void) {
1043 puts(PACKAGE_STRING);
1044 puts(SYSTEMD_FEATURES);
1049 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1058 /* Make sure nothing is really destructed when we shut down */
1061 r = manager_open_serialization(m, &f);
1063 log_error("Failed to create serialization file: %s", strerror(-r));
1070 log_error("Failed to allocate fd set: %s", strerror(-r));
1074 r = manager_serialize(m, f, fds, switching_root);
1076 log_error("Failed to serialize state: %s", strerror(-r));
1080 if (fseeko(f, 0, SEEK_SET) < 0) {
1081 log_error("Failed to rewind serialization fd: %m");
1085 r = fd_cloexec(fileno(f), false);
1087 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1091 r = fdset_cloexec(fds, false);
1093 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1111 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1115 assert(saved_rlimit);
1117 /* Save the original RLIMIT_NOFILE so that we can reset it
1118 * later when transitioning from the initrd to the main
1119 * systemd or suchlike. */
1120 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1121 log_error("Reading RLIMIT_NOFILE failed: %m");
1125 /* Make sure forked processes get the default kernel setting */
1126 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1129 rl = newdup(struct rlimit, saved_rlimit, 1);
1133 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1136 /* Bump up the resource limit for ourselves substantially */
1137 nl.rlim_cur = nl.rlim_max = 64*1024;
1138 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1140 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1147 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1149 unsigned long long a, b;
1153 e = getenv("RD_TIMESTAMP");
1157 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1160 t->realtime = (usec_t) a;
1161 t->monotonic = (usec_t) b;
1166 static void test_mtab(void) {
1169 /* Check that /etc/mtab is a symlink */
1171 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1174 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1181 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1182 "This is not supported anymore. "
1183 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1186 static void test_usr(void) {
1188 /* Check that /usr is not a separate fs */
1190 if (dir_is_empty("/usr") <= 0)
1193 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1194 "Some things will probably break (sometimes even silently) in mysterious ways. "
1195 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1198 static void test_cgroups(void) {
1200 if (access("/proc/cgroups", F_OK) >= 0)
1203 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1204 "Systems without control groups are not supported. "
1205 "We will now sleep for 10s, and then continue boot-up. "
1206 "Expect breakage and please do not file bugs. "
1207 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1208 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1213 static int initialize_join_controllers(void) {
1214 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1215 * + "net_prio". We'd like to add "cpuset" to the mix, but
1216 * "cpuset" does't really work for groups with no initialized
1219 arg_join_controllers = new(char**, 3);
1220 if (!arg_join_controllers)
1223 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1224 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1225 arg_join_controllers[2] = NULL;
1227 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1228 free_join_controllers();
1235 int main(int argc, char *argv[]) {
1237 int r, retval = EXIT_FAILURE;
1238 usec_t before_startup, after_startup;
1239 char timespan[FORMAT_TIMESPAN_MAX];
1241 bool reexecute = false;
1242 const char *shutdown_verb = NULL;
1243 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1244 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1245 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1246 static char systemd[] = "systemd";
1247 bool skip_setup = false;
1249 bool loaded_policy = false;
1250 bool arm_reboot_watchdog = false;
1251 bool queue_default_job = false;
1252 char *switch_root_dir = NULL, *switch_root_init = NULL;
1253 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1255 #ifdef HAVE_SYSV_COMPAT
1256 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1257 /* This is compatibility support for SysV, where
1258 * calling init as a user is identical to telinit. */
1261 execv(SYSTEMCTL_BINARY_PATH, argv);
1262 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1267 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1268 dual_timestamp_get(&userspace_timestamp);
1270 /* Determine if this is a reexecution or normal bootup. We do
1271 * the full command line parsing much later, so let's just
1272 * have a quick peek here. */
1273 if (strv_find(argv+1, "--deserialize"))
1276 /* If we have switched root, do all the special setup
1278 if (strv_find(argv+1, "--switched-root"))
1281 /* If we get started via the /sbin/init symlink then we are
1282 called 'init'. After a subsequent reexecution we are then
1283 called 'systemd'. That is confusing, hence let's call us
1284 systemd right-away. */
1285 program_invocation_short_name = systemd;
1286 prctl(PR_SET_NAME, systemd);
1291 log_show_color(isatty(STDERR_FILENO) > 0);
1293 if (getpid() == 1 && detect_container(NULL) <= 0) {
1295 /* Running outside of a container as PID 1 */
1296 arg_running_as = SYSTEMD_SYSTEM;
1298 log_set_target(LOG_TARGET_KMSG);
1302 char *rd_timestamp = NULL;
1304 initrd_timestamp = userspace_timestamp;
1305 asprintf(&rd_timestamp, "%llu %llu",
1306 (unsigned long long) initrd_timestamp.realtime,
1307 (unsigned long long) initrd_timestamp.monotonic);
1309 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1315 mount_setup_early();
1316 if (selinux_setup(&loaded_policy) < 0)
1318 if (ima_setup() < 0)
1320 if (smack_setup() < 0)
1324 if (label_init(NULL) < 0)
1328 if (hwclock_is_localtime() > 0) {
1331 /* The first-time call to settimeofday() does a time warp in the kernel */
1332 r = hwclock_set_timezone(&min);
1334 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1336 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1337 } else if (!in_initrd()) {
1339 * Do dummy first-time call to seal the kernel's time warp magic
1341 * Do not call this this from inside the initrd. The initrd might not
1342 * carry /etc/adjtime with LOCAL, but the real system could be set up
1343 * that way. In such case, we need to delay the time-warp or the sealing
1344 * until we reach the real system.
1346 hwclock_reset_timezone();
1348 /* Tell the kernel our time zone */
1349 r = hwclock_set_timezone(NULL);
1351 log_error("Failed to set the kernel's time zone, ignoring: %s", strerror(-r));
1355 /* Set the default for later on, but don't actually
1356 * open the logs like this for now. Note that if we
1357 * are transitioning from the initrd there might still
1358 * be journal fd open, and we shouldn't attempt
1359 * opening that before we parsed /proc/cmdline which
1360 * might redirect output elsewhere. */
1361 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1363 } 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);
1372 /* clear the kernel timestamp,
1373 * because we are in a container */
1374 kernel_timestamp.monotonic = 0ULL;
1375 kernel_timestamp.realtime = 0ULL;
1378 /* Running as user instance */
1379 arg_running_as = SYSTEMD_USER;
1380 log_set_target(LOG_TARGET_AUTO);
1383 /* clear the kernel timestamp,
1384 * because we are not PID 1 */
1385 kernel_timestamp.monotonic = 0ULL;
1386 kernel_timestamp.realtime = 0ULL;
1389 /* Initialize default unit */
1390 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1392 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1396 r = initialize_join_controllers();
1400 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1401 * /proc/$PID/fd is available. */
1402 if (getpid() == 1) {
1403 r = mount_setup(loaded_policy);
1408 /* Reset all signal handlers. */
1409 assert_se(reset_all_signal_handlers() == 0);
1411 ignore_signals(SIGNALS_IGNORE, -1);
1413 if (parse_config_file() < 0)
1416 if (arg_running_as == SYSTEMD_SYSTEM)
1417 if (parse_proc_cmdline() < 0)
1420 log_parse_environment();
1422 if (parse_argv(argc, argv) < 0)
1425 if (arg_action == ACTION_TEST &&
1427 log_error("Don't run test mode as root.");
1431 if (arg_running_as == SYSTEMD_USER &&
1432 arg_action == ACTION_RUN &&
1434 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1438 if (arg_running_as == SYSTEMD_SYSTEM &&
1439 arg_action == ACTION_RUN &&
1440 running_in_chroot() > 0) {
1441 log_error("Cannot be run in a chroot() environment.");
1445 if (arg_action == ACTION_HELP) {
1448 } else if (arg_action == ACTION_VERSION) {
1451 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1452 unit_dump_config_items(stdout);
1453 retval = EXIT_SUCCESS;
1455 } else if (arg_action == ACTION_DONE) {
1456 retval = EXIT_SUCCESS;
1460 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1462 /* Close logging fds, in order not to confuse fdset below */
1465 /* Remember open file descriptors for later deserialization */
1466 r = fdset_new_fill(&fds);
1468 log_error("Failed to allocate fd set: %s", strerror(-r));
1471 fdset_cloexec(fds, true);
1474 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1476 /* Set up PATH unless it is already set */
1478 #ifdef HAVE_SPLIT_USR
1479 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1481 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1483 arg_running_as == SYSTEMD_SYSTEM);
1485 if (arg_running_as == SYSTEMD_SYSTEM) {
1486 /* Parse the data passed to us. We leave this
1487 * variables set, but the manager later on will not
1488 * pass them on to our children. */
1490 parse_initrd_timestamp(&initrd_timestamp);
1492 /* Unset some environment variables passed in from the
1493 * kernel that don't really make sense for us. */
1497 /* When we are invoked by a shell, these might be set,
1498 * but make little sense to pass on */
1503 /* When we are invoked by a chroot-like tool such as
1504 * nspawn, these might be set, but make little sense
1507 unsetenv("LOGNAME");
1509 /* We suppress the socket activation env vars, as
1510 * we'll try to match *any* open fd to units if
1512 unsetenv("LISTEN_FDS");
1513 unsetenv("LISTEN_PID");
1515 /* All other variables are left as is, so that clients
1516 * can still read them via /proc/1/environ */
1519 /* Move out of the way, so that we won't block unmounts */
1520 assert_se(chdir("/") == 0);
1522 if (arg_running_as == SYSTEMD_SYSTEM) {
1523 /* Become a session leader if we aren't one yet. */
1526 /* Disable the umask logic */
1530 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1531 dbus_connection_set_change_sigpipe(FALSE);
1533 /* Reset the console, but only if this is really init and we
1534 * are freshly booted */
1535 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1536 console_setup(getpid() == 1 && !skip_setup);
1538 /* Open the logging devices, if possible and necessary */
1541 /* Make sure we leave a core dump without panicing the
1543 if (getpid() == 1) {
1544 install_crash_handler();
1546 r = mount_cgroup_controllers(arg_join_controllers);
1551 if (arg_running_as == SYSTEMD_SYSTEM) {
1552 const char *virtualization = NULL;
1554 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1556 detect_virtualization(&virtualization);
1558 log_info("Detected virtualization '%s'.", virtualization);
1561 log_info("Running in initial RAM disk.");
1564 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1566 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1569 if (arg_show_status || plymouth_running())
1584 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1585 watchdog_set_timeout(&arg_runtime_watchdog);
1587 if (arg_timer_slack_nsec != (nsec_t) -1)
1588 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1589 log_error("Failed to adjust timer slack: %m");
1591 if (arg_capability_bounding_set_drop) {
1592 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1594 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1597 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1599 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1604 if (arg_running_as == SYSTEMD_USER) {
1605 /* Become reaper of our children */
1606 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1607 log_warning("Failed to make us a subreaper: %m");
1608 if (errno == EINVAL)
1609 log_info("Perhaps the kernel version is too old (< 3.4?)");
1613 if (arg_running_as == SYSTEMD_SYSTEM)
1614 bump_rlimit_nofile(&saved_rlimit_nofile);
1616 r = manager_new(arg_running_as, &m);
1618 log_error("Failed to allocate manager object: %s", strerror(-r));
1622 m->confirm_spawn = arg_confirm_spawn;
1623 m->default_std_output = arg_default_std_output;
1624 m->default_std_error = arg_default_std_error;
1625 m->runtime_watchdog = arg_runtime_watchdog;
1626 m->shutdown_watchdog = arg_shutdown_watchdog;
1627 m->userspace_timestamp = userspace_timestamp;
1628 m->kernel_timestamp = kernel_timestamp;
1629 m->initrd_timestamp = initrd_timestamp;
1631 manager_set_default_rlimits(m, arg_default_rlimit);
1633 if (arg_default_environment)
1634 manager_set_default_environment(m, arg_default_environment);
1636 manager_set_show_status(m, arg_show_status);
1638 /* Remember whether we should queue the default job */
1639 queue_default_job = !serialization || arg_switched_root;
1641 before_startup = now(CLOCK_MONOTONIC);
1643 r = manager_startup(m, serialization, fds);
1645 log_error("Failed to fully start up daemon: %s", strerror(-r));
1647 /* This will close all file descriptors that were opened, but
1648 * not claimed by any unit. */
1651 if (serialization) {
1652 fclose(serialization);
1653 serialization = NULL;
1656 if (queue_default_job) {
1658 Unit *target = NULL;
1659 Job *default_unit_job;
1661 dbus_error_init(&error);
1663 log_debug("Activating default unit: %s", arg_default_unit);
1665 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1667 log_error("Failed to load default target: %s", bus_error(&error, r));
1668 dbus_error_free(&error);
1669 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1670 log_error("Failed to load default target: %s", strerror(-target->load_error));
1671 else if (target->load_state == UNIT_MASKED)
1672 log_error("Default target masked.");
1674 if (!target || target->load_state != UNIT_LOADED) {
1675 log_info("Trying to load rescue target...");
1677 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1679 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1680 dbus_error_free(&error);
1682 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1683 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1685 } else if (target->load_state == UNIT_MASKED) {
1686 log_error("Rescue target masked.");
1691 assert(target->load_state == UNIT_LOADED);
1693 if (arg_action == ACTION_TEST) {
1694 printf("-> By units:\n");
1695 manager_dump_units(m, stdout, "\t");
1698 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1700 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1701 dbus_error_free(&error);
1703 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1705 log_error("Failed to start default target: %s", bus_error(&error, r));
1706 dbus_error_free(&error);
1710 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1711 dbus_error_free(&error);
1715 m->default_unit_job_id = default_unit_job->id;
1717 after_startup = now(CLOCK_MONOTONIC);
1718 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1719 "Loaded units and determined initial transaction in %s.",
1720 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1722 if (arg_action == ACTION_TEST) {
1723 printf("-> By jobs:\n");
1724 manager_dump_jobs(m, stdout, "\t");
1725 retval = EXIT_SUCCESS;
1731 r = manager_loop(m);
1733 log_error("Failed to run mainloop: %s", strerror(-r));
1737 switch (m->exit_code) {
1740 retval = EXIT_SUCCESS;
1744 case MANAGER_RELOAD:
1745 log_info("Reloading.");
1746 r = manager_reload(m);
1748 log_error("Failed to reload: %s", strerror(-r));
1751 case MANAGER_REEXECUTE:
1753 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1757 log_notice("Reexecuting.");
1760 case MANAGER_SWITCH_ROOT:
1761 /* Steal the switch root parameters */
1762 switch_root_dir = m->switch_root;
1763 switch_root_init = m->switch_root_init;
1764 m->switch_root = m->switch_root_init = NULL;
1766 if (!switch_root_init)
1767 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1771 log_notice("Switching root.");
1774 case MANAGER_REBOOT:
1775 case MANAGER_POWEROFF:
1777 case MANAGER_KEXEC: {
1778 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1779 [MANAGER_REBOOT] = "reboot",
1780 [MANAGER_POWEROFF] = "poweroff",
1781 [MANAGER_HALT] = "halt",
1782 [MANAGER_KEXEC] = "kexec"
1785 assert_se(shutdown_verb = table[m->exit_code]);
1786 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1788 log_notice("Shutting down.");
1793 assert_not_reached("Unknown exit code.");
1801 for (j = 0; j < RLIMIT_NLIMITS; j++)
1802 free(arg_default_rlimit[j]);
1804 free(arg_default_unit);
1805 free_join_controllers();
1812 unsigned i, args_size;
1814 /* Close and disarm the watchdog, so that the new
1815 * instance can reinitialize it, but doesn't get
1816 * rebooted while we do that */
1817 watchdog_close(true);
1819 /* Reset the RLIMIT_NOFILE to the kernel default, so
1820 * that the new systemd can pass the kernel default to
1821 * its child processes */
1822 if (saved_rlimit_nofile.rlim_cur > 0)
1823 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1825 if (switch_root_dir) {
1826 /* Kill all remaining processes from the
1827 * initrd, but don't wait for them, so that we
1828 * can handle the SIGCHLD for them after
1830 broadcast_signal(SIGTERM, false);
1832 /* And switch root */
1833 r = switch_root(switch_root_dir);
1835 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1838 args_size = MAX(6, argc+1);
1839 args = newa(const char*, args_size);
1841 if (!switch_root_init) {
1844 /* First try to spawn ourselves with the right
1845 * path, and with full serialization. We do
1846 * this only if the user didn't specify an
1847 * explicit init to spawn. */
1849 assert(serialization);
1852 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1856 args[i++] = SYSTEMD_BINARY_PATH;
1857 if (switch_root_dir)
1858 args[i++] = "--switched-root";
1859 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1860 args[i++] = "--deserialize";
1864 assert(i <= args_size);
1865 execv(args[0], (char* const*) args);
1868 /* Try the fallback, if there is any, without any
1869 * serialization. We pass the original argv[] and
1870 * envp[]. (Well, modulo the ordering changes due to
1871 * getopt() in argv[], and some cleanups in envp[],
1872 * but let's hope that doesn't matter.) */
1874 if (serialization) {
1875 fclose(serialization);
1876 serialization = NULL;
1884 /* Reopen the console */
1885 make_console_stdio();
1887 for (j = 1, i = 1; j < argc; j++)
1888 args[i++] = argv[j];
1890 assert(i <= args_size);
1892 if (switch_root_init) {
1893 args[0] = switch_root_init;
1894 execv(args[0], (char* const*) args);
1895 log_warning("Failed to execute configured init, trying fallback: %m");
1898 args[0] = "/sbin/init";
1899 execv(args[0], (char* const*) args);
1901 if (errno == ENOENT) {
1902 log_warning("No /sbin/init, trying fallback");
1904 args[0] = "/bin/sh";
1906 execv(args[0], (char* const*) args);
1907 log_error("Failed to execute /bin/sh, giving up: %m");
1909 log_warning("Failed to execute /sbin/init, giving up: %m");
1913 fclose(serialization);
1918 if (shutdown_verb) {
1919 const char * command_line[] = {
1920 SYSTEMD_SHUTDOWN_BINARY_PATH,
1926 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1929 /* If we reboot let's set the shutdown
1930 * watchdog and tell the shutdown binary to
1931 * repeatedly ping it */
1932 watchdog_set_timeout(&arg_shutdown_watchdog);
1933 watchdog_close(false);
1935 /* Tell the binary how often to ping */
1936 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1939 env_block = strv_append(environ, e);
1941 env_block = strv_copy(environ);
1942 watchdog_close(true);
1945 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1947 log_error("Failed to execute shutdown binary, freezing: %m");