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 r = manager_open_serialization(m, &f);
1060 log_error("Failed to create serialization file: %s", strerror(-r));
1064 /* Make sure nothing is really destructed when we shut down */
1066 bus_broadcast_reloading(m, true);
1071 log_error("Failed to allocate fd set: %s", strerror(-r));
1075 r = manager_serialize(m, f, fds, switching_root);
1077 log_error("Failed to serialize state: %s", strerror(-r));
1081 if (fseeko(f, 0, SEEK_SET) < 0) {
1082 log_error("Failed to rewind serialization fd: %m");
1086 r = fd_cloexec(fileno(f), false);
1088 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1092 r = fdset_cloexec(fds, false);
1094 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1112 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1116 assert(saved_rlimit);
1118 /* Save the original RLIMIT_NOFILE so that we can reset it
1119 * later when transitioning from the initrd to the main
1120 * systemd or suchlike. */
1121 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1122 log_error("Reading RLIMIT_NOFILE failed: %m");
1126 /* Make sure forked processes get the default kernel setting */
1127 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1130 rl = newdup(struct rlimit, saved_rlimit, 1);
1134 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1137 /* Bump up the resource limit for ourselves substantially */
1138 nl.rlim_cur = nl.rlim_max = 64*1024;
1139 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1141 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1148 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1150 unsigned long long a, b;
1154 e = getenv("RD_TIMESTAMP");
1158 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1161 t->realtime = (usec_t) a;
1162 t->monotonic = (usec_t) b;
1167 static void test_mtab(void) {
1170 /* Check that /etc/mtab is a symlink */
1172 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1175 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1182 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1183 "This is not supported anymore. "
1184 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1187 static void test_usr(void) {
1189 /* Check that /usr is not a separate fs */
1191 if (dir_is_empty("/usr") <= 0)
1194 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1195 "Some things will probably break (sometimes even silently) in mysterious ways. "
1196 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1199 static void test_cgroups(void) {
1201 if (access("/proc/cgroups", F_OK) >= 0)
1204 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1205 "Systems without control groups are not supported. "
1206 "We will now sleep for 10s, and then continue boot-up. "
1207 "Expect breakage and please do not file bugs. "
1208 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1209 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1214 static int initialize_join_controllers(void) {
1215 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1216 * + "net_prio". We'd like to add "cpuset" to the mix, but
1217 * "cpuset" does't really work for groups with no initialized
1220 arg_join_controllers = new(char**, 3);
1221 if (!arg_join_controllers)
1224 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1225 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1226 arg_join_controllers[2] = NULL;
1228 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1229 free_join_controllers();
1236 int main(int argc, char *argv[]) {
1238 int r, retval = EXIT_FAILURE;
1239 usec_t before_startup, after_startup;
1240 char timespan[FORMAT_TIMESPAN_MAX];
1242 bool reexecute = false;
1243 const char *shutdown_verb = NULL;
1244 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1245 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1246 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1247 static char systemd[] = "systemd";
1248 bool skip_setup = false;
1250 bool loaded_policy = false;
1251 bool arm_reboot_watchdog = false;
1252 bool queue_default_job = false;
1253 char *switch_root_dir = NULL, *switch_root_init = NULL;
1254 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1256 #ifdef HAVE_SYSV_COMPAT
1257 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1258 /* This is compatibility support for SysV, where
1259 * calling init as a user is identical to telinit. */
1262 execv(SYSTEMCTL_BINARY_PATH, argv);
1263 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1268 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1269 dual_timestamp_get(&userspace_timestamp);
1271 /* Determine if this is a reexecution or normal bootup. We do
1272 * the full command line parsing much later, so let's just
1273 * have a quick peek here. */
1274 if (strv_find(argv+1, "--deserialize"))
1277 /* If we have switched root, do all the special setup
1279 if (strv_find(argv+1, "--switched-root"))
1282 /* If we get started via the /sbin/init symlink then we are
1283 called 'init'. After a subsequent reexecution we are then
1284 called 'systemd'. That is confusing, hence let's call us
1285 systemd right-away. */
1286 program_invocation_short_name = systemd;
1287 prctl(PR_SET_NAME, systemd);
1292 log_show_color(isatty(STDERR_FILENO) > 0);
1294 if (getpid() == 1 && detect_container(NULL) <= 0) {
1296 /* Running outside of a container as PID 1 */
1297 arg_running_as = SYSTEMD_SYSTEM;
1299 log_set_target(LOG_TARGET_KMSG);
1303 char *rd_timestamp = NULL;
1305 initrd_timestamp = userspace_timestamp;
1306 asprintf(&rd_timestamp, "%llu %llu",
1307 (unsigned long long) initrd_timestamp.realtime,
1308 (unsigned long long) initrd_timestamp.monotonic);
1310 setenv("RD_TIMESTAMP", rd_timestamp, 1);
1316 mount_setup_early();
1317 if (selinux_setup(&loaded_policy) < 0)
1319 if (ima_setup() < 0)
1321 if (smack_setup() < 0)
1325 if (label_init(NULL) < 0)
1329 if (hwclock_is_localtime() > 0) {
1332 /* The first-time call to settimeofday() does a time warp in the kernel */
1333 r = hwclock_set_timezone(&min);
1335 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1337 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1338 } else if (!in_initrd()) {
1340 * Do dummy first-time call to seal the kernel's time warp magic
1342 * Do not call this this from inside the initrd. The initrd might not
1343 * carry /etc/adjtime with LOCAL, but the real system could be set up
1344 * that way. In such case, we need to delay the time-warp or the sealing
1345 * until we reach the real system.
1347 hwclock_reset_timezone();
1349 /* Tell the kernel our timezone */
1350 r = hwclock_set_timezone(NULL);
1352 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1356 /* Set the default for later on, but don't actually
1357 * open the logs like this for now. Note that if we
1358 * are transitioning from the initrd there might still
1359 * be journal fd open, and we shouldn't attempt
1360 * opening that before we parsed /proc/cmdline which
1361 * might redirect output elsewhere. */
1362 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1364 } else if (getpid() == 1) {
1365 /* Running inside a container, as PID 1 */
1366 arg_running_as = SYSTEMD_SYSTEM;
1367 log_set_target(LOG_TARGET_CONSOLE);
1370 /* For the later on, see above... */
1371 log_set_target(LOG_TARGET_JOURNAL);
1373 /* clear the kernel timestamp,
1374 * because we are in a container */
1375 kernel_timestamp.monotonic = 0ULL;
1376 kernel_timestamp.realtime = 0ULL;
1379 /* Running as user instance */
1380 arg_running_as = SYSTEMD_USER;
1381 log_set_target(LOG_TARGET_AUTO);
1384 /* clear the kernel timestamp,
1385 * because we are not PID 1 */
1386 kernel_timestamp.monotonic = 0ULL;
1387 kernel_timestamp.realtime = 0ULL;
1390 /* Initialize default unit */
1391 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1393 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1397 r = initialize_join_controllers();
1401 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1402 * /proc/$PID/fd is available. */
1403 if (getpid() == 1) {
1404 r = mount_setup(loaded_policy);
1409 /* Reset all signal handlers. */
1410 assert_se(reset_all_signal_handlers() == 0);
1412 ignore_signals(SIGNALS_IGNORE, -1);
1414 if (parse_config_file() < 0)
1417 if (arg_running_as == SYSTEMD_SYSTEM)
1418 if (parse_proc_cmdline() < 0)
1421 log_parse_environment();
1423 if (parse_argv(argc, argv) < 0)
1426 if (arg_action == ACTION_TEST &&
1428 log_error("Don't run test mode as root.");
1432 if (arg_running_as == SYSTEMD_USER &&
1433 arg_action == ACTION_RUN &&
1435 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1439 if (arg_running_as == SYSTEMD_SYSTEM &&
1440 arg_action == ACTION_RUN &&
1441 running_in_chroot() > 0) {
1442 log_error("Cannot be run in a chroot() environment.");
1446 if (arg_action == ACTION_HELP) {
1449 } else if (arg_action == ACTION_VERSION) {
1452 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1453 unit_dump_config_items(stdout);
1454 retval = EXIT_SUCCESS;
1456 } else if (arg_action == ACTION_DONE) {
1457 retval = EXIT_SUCCESS;
1461 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1463 /* Close logging fds, in order not to confuse fdset below */
1466 /* Remember open file descriptors for later deserialization */
1467 r = fdset_new_fill(&fds);
1469 log_error("Failed to allocate fd set: %s", strerror(-r));
1472 fdset_cloexec(fds, true);
1475 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1477 /* Set up PATH unless it is already set */
1479 #ifdef HAVE_SPLIT_USR
1480 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1482 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1484 arg_running_as == SYSTEMD_SYSTEM);
1486 if (arg_running_as == SYSTEMD_SYSTEM) {
1487 /* Parse the data passed to us. We leave this
1488 * variables set, but the manager later on will not
1489 * pass them on to our children. */
1491 parse_initrd_timestamp(&initrd_timestamp);
1493 /* Unset some environment variables passed in from the
1494 * kernel that don't really make sense for us. */
1498 /* When we are invoked by a shell, these might be set,
1499 * but make little sense to pass on */
1504 /* When we are invoked by a chroot-like tool such as
1505 * nspawn, these might be set, but make little sense
1508 unsetenv("LOGNAME");
1510 /* We suppress the socket activation env vars, as
1511 * we'll try to match *any* open fd to units if
1513 unsetenv("LISTEN_FDS");
1514 unsetenv("LISTEN_PID");
1516 /* All other variables are left as is, so that clients
1517 * can still read them via /proc/1/environ */
1519 /* Become a session leader if we aren't one yet. */
1522 /* Disable the umask logic */
1526 /* Move out of the way, so that we won't block unmounts */
1527 assert_se(chdir("/") == 0);
1529 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1530 dbus_connection_set_change_sigpipe(FALSE);
1532 /* Reset the console, but only if this is really init and we
1533 * are freshly booted */
1534 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1535 console_setup(getpid() == 1 && !skip_setup);
1537 /* Open the logging devices, if possible and necessary */
1540 /* Make sure we leave a core dump without panicing the
1542 if (getpid() == 1) {
1543 install_crash_handler();
1545 r = mount_cgroup_controllers(arg_join_controllers);
1550 if (arg_running_as == SYSTEMD_SYSTEM) {
1551 const char *virtualization = NULL;
1553 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1555 detect_virtualization(&virtualization);
1557 log_info("Detected virtualization '%s'.", virtualization);
1560 log_info("Running in initial RAM disk.");
1563 log_debug(PACKAGE_STRING " running in user mode. (" SYSTEMD_FEATURES ")");
1565 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1568 if (arg_show_status || plymouth_running())
1583 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1584 watchdog_set_timeout(&arg_runtime_watchdog);
1586 if (arg_timer_slack_nsec != (nsec_t) -1)
1587 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1588 log_error("Failed to adjust timer slack: %m");
1590 if (arg_capability_bounding_set_drop) {
1591 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1593 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1596 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1598 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1603 if (arg_running_as == SYSTEMD_USER) {
1604 /* Become reaper of our children */
1605 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1606 log_warning("Failed to make us a subreaper: %m");
1607 if (errno == EINVAL)
1608 log_info("Perhaps the kernel version is too old (< 3.4?)");
1612 if (arg_running_as == SYSTEMD_SYSTEM)
1613 bump_rlimit_nofile(&saved_rlimit_nofile);
1615 r = manager_new(arg_running_as, !!serialization, &m);
1617 log_error("Failed to allocate manager object: %s", strerror(-r));
1621 m->confirm_spawn = arg_confirm_spawn;
1622 m->default_std_output = arg_default_std_output;
1623 m->default_std_error = arg_default_std_error;
1624 m->runtime_watchdog = arg_runtime_watchdog;
1625 m->shutdown_watchdog = arg_shutdown_watchdog;
1626 m->userspace_timestamp = userspace_timestamp;
1627 m->kernel_timestamp = kernel_timestamp;
1628 m->initrd_timestamp = initrd_timestamp;
1630 manager_set_default_rlimits(m, arg_default_rlimit);
1632 if (arg_default_environment)
1633 manager_set_default_environment(m, arg_default_environment);
1635 manager_set_show_status(m, arg_show_status);
1637 /* Remember whether we should queue the default job */
1638 queue_default_job = !serialization || arg_switched_root;
1640 before_startup = now(CLOCK_MONOTONIC);
1642 r = manager_startup(m, serialization, fds);
1644 log_error("Failed to fully start up daemon: %s", strerror(-r));
1646 /* This will close all file descriptors that were opened, but
1647 * not claimed by any unit. */
1650 if (serialization) {
1651 fclose(serialization);
1652 serialization = NULL;
1655 if (queue_default_job) {
1657 Unit *target = NULL;
1658 Job *default_unit_job;
1660 dbus_error_init(&error);
1662 log_debug("Activating default unit: %s", arg_default_unit);
1664 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1666 log_error("Failed to load default target: %s", bus_error(&error, r));
1667 dbus_error_free(&error);
1668 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1669 log_error("Failed to load default target: %s", strerror(-target->load_error));
1670 else if (target->load_state == UNIT_MASKED)
1671 log_error("Default target masked.");
1673 if (!target || target->load_state != UNIT_LOADED) {
1674 log_info("Trying to load rescue target...");
1676 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1678 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1679 dbus_error_free(&error);
1681 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1682 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1684 } else if (target->load_state == UNIT_MASKED) {
1685 log_error("Rescue target masked.");
1690 assert(target->load_state == UNIT_LOADED);
1692 if (arg_action == ACTION_TEST) {
1693 printf("-> By units:\n");
1694 manager_dump_units(m, stdout, "\t");
1697 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1699 log_debug("Default target could not be isolated, starting instead: %s", bus_error(&error, r));
1700 dbus_error_free(&error);
1702 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1704 log_error("Failed to start default target: %s", bus_error(&error, r));
1705 dbus_error_free(&error);
1709 log_error("Failed to isolate default target: %s", bus_error(&error, r));
1710 dbus_error_free(&error);
1714 m->default_unit_job_id = default_unit_job->id;
1716 after_startup = now(CLOCK_MONOTONIC);
1717 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1718 "Loaded units and determined initial transaction in %s.",
1719 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1721 if (arg_action == ACTION_TEST) {
1722 printf("-> By jobs:\n");
1723 manager_dump_jobs(m, stdout, "\t");
1724 retval = EXIT_SUCCESS;
1730 r = manager_loop(m);
1732 log_error("Failed to run mainloop: %s", strerror(-r));
1736 switch (m->exit_code) {
1739 retval = EXIT_SUCCESS;
1743 case MANAGER_RELOAD:
1744 log_info("Reloading.");
1745 r = manager_reload(m);
1747 log_error("Failed to reload: %s", strerror(-r));
1750 case MANAGER_REEXECUTE:
1752 if (prepare_reexecute(m, &serialization, &fds, false) < 0)
1756 log_notice("Reexecuting.");
1759 case MANAGER_SWITCH_ROOT:
1760 /* Steal the switch root parameters */
1761 switch_root_dir = m->switch_root;
1762 switch_root_init = m->switch_root_init;
1763 m->switch_root = m->switch_root_init = NULL;
1765 if (!switch_root_init)
1766 if (prepare_reexecute(m, &serialization, &fds, true) < 0)
1770 log_notice("Switching root.");
1773 case MANAGER_REBOOT:
1774 case MANAGER_POWEROFF:
1776 case MANAGER_KEXEC: {
1777 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1778 [MANAGER_REBOOT] = "reboot",
1779 [MANAGER_POWEROFF] = "poweroff",
1780 [MANAGER_HALT] = "halt",
1781 [MANAGER_KEXEC] = "kexec"
1784 assert_se(shutdown_verb = table[m->exit_code]);
1785 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1787 log_notice("Shutting down.");
1792 assert_not_reached("Unknown exit code.");
1800 for (j = 0; j < RLIMIT_NLIMITS; j++)
1801 free(arg_default_rlimit[j]);
1803 free(arg_default_unit);
1804 free_join_controllers();
1811 unsigned i, args_size;
1813 /* Close and disarm the watchdog, so that the new
1814 * instance can reinitialize it, but doesn't get
1815 * rebooted while we do that */
1816 watchdog_close(true);
1818 /* Reset the RLIMIT_NOFILE to the kernel default, so
1819 * that the new systemd can pass the kernel default to
1820 * its child processes */
1821 if (saved_rlimit_nofile.rlim_cur > 0)
1822 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1824 if (switch_root_dir) {
1825 /* Kill all remaining processes from the
1826 * initrd, but don't wait for them, so that we
1827 * can handle the SIGCHLD for them after
1829 broadcast_signal(SIGTERM, false);
1831 /* And switch root */
1832 r = switch_root(switch_root_dir);
1834 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1837 args_size = MAX(6, argc+1);
1838 args = newa(const char*, args_size);
1840 if (!switch_root_init) {
1843 /* First try to spawn ourselves with the right
1844 * path, and with full serialization. We do
1845 * this only if the user didn't specify an
1846 * explicit init to spawn. */
1848 assert(serialization);
1851 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1855 args[i++] = SYSTEMD_BINARY_PATH;
1856 if (switch_root_dir)
1857 args[i++] = "--switched-root";
1858 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1859 args[i++] = "--deserialize";
1863 assert(i <= args_size);
1864 execv(args[0], (char* const*) args);
1867 /* Try the fallback, if there is any, without any
1868 * serialization. We pass the original argv[] and
1869 * envp[]. (Well, modulo the ordering changes due to
1870 * getopt() in argv[], and some cleanups in envp[],
1871 * but let's hope that doesn't matter.) */
1873 if (serialization) {
1874 fclose(serialization);
1875 serialization = NULL;
1883 /* Reopen the console */
1884 make_console_stdio();
1886 for (j = 1, i = 1; j < argc; j++)
1887 args[i++] = argv[j];
1889 assert(i <= args_size);
1891 if (switch_root_init) {
1892 args[0] = switch_root_init;
1893 execv(args[0], (char* const*) args);
1894 log_warning("Failed to execute configured init, trying fallback: %m");
1897 args[0] = "/sbin/init";
1898 execv(args[0], (char* const*) args);
1900 if (errno == ENOENT) {
1901 log_warning("No /sbin/init, trying fallback");
1903 args[0] = "/bin/sh";
1905 execv(args[0], (char* const*) args);
1906 log_error("Failed to execute /bin/sh, giving up: %m");
1908 log_warning("Failed to execute /sbin/init, giving up: %m");
1912 fclose(serialization);
1917 if (shutdown_verb) {
1918 const char * command_line[] = {
1919 SYSTEMD_SHUTDOWN_BINARY_PATH,
1925 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1928 /* If we reboot let's set the shutdown
1929 * watchdog and tell the shutdown binary to
1930 * repeatedly ping it */
1931 watchdog_set_timeout(&arg_shutdown_watchdog);
1932 watchdog_close(false);
1934 /* Tell the binary how often to ping */
1935 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1938 env_block = strv_append(environ, e);
1940 env_block = strv_copy(environ);
1941 watchdog_close(true);
1944 /* Avoid the creation of new processes forked by the
1945 * kernel; at this point, we will not listen to the
1947 if (detect_container(NULL) <= 0)
1948 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1950 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1952 log_error("Failed to execute shutdown binary, freezing: %m");