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/>.
26 #include <sys/types.h>
32 #include <sys/prctl.h>
33 #include <sys/mount.h>
35 #ifdef HAVE_VALGRIND_VALGRIND_H
36 #include <valgrind/valgrind.h>
39 #include "sd-daemon.h"
40 #include "sd-messages.h"
44 #include "load-fragment.h"
47 #include "conf-parser.h"
55 #include "path-util.h"
56 #include "switch-root.h"
57 #include "capability.h"
62 #include "dbus-manager.h"
63 #include "bus-error.h"
66 #include "mount-setup.h"
67 #include "loopback-setup.h"
68 #include "hostname-setup.h"
69 #include "machine-id-setup.h"
70 #include "selinux-setup.h"
71 #include "ima-setup.h"
72 #include "smack-setup.h"
74 #include "kmod-setup.h"
82 ACTION_DUMP_CONFIGURATION_ITEMS,
84 } arg_action = ACTION_RUN;
85 static char *arg_default_unit = NULL;
86 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
87 static bool arg_dump_core = true;
88 static bool arg_crash_shell = false;
89 static int arg_crash_chvt = -1;
90 static bool arg_confirm_spawn = false;
91 static ShowStatus arg_show_status = SHOW_STATUS_UNSET;
92 static bool arg_switched_root = false;
93 static char ***arg_join_controllers = NULL;
94 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
95 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
96 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
97 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
98 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
99 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
100 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
101 static usec_t arg_runtime_watchdog = 0;
102 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
103 static char **arg_default_environment = NULL;
104 static struct rlimit *arg_default_rlimit[RLIMIT_NLIMITS] = {};
105 static uint64_t arg_capability_bounding_set_drop = 0;
106 static nsec_t arg_timer_slack_nsec = (nsec_t) -1;
107 static Set* arg_syscall_archs = NULL;
108 static FILE* arg_serialization = NULL;
110 static void nop_handler(int sig) {}
112 noreturn static void crash(int sig) {
115 /* Pass this on immediately, if this is not PID 1 */
117 else if (!arg_dump_core)
118 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
120 struct sigaction sa = {
121 .sa_handler = nop_handler,
122 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
126 /* We want to wait for the core process, hence let's enable SIGCHLD */
127 sigaction(SIGCHLD, &sa, NULL);
131 log_error("Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
134 struct rlimit rl = {};
136 /* Enable default signal handler for core dump */
138 sa.sa_handler = SIG_DFL;
139 sigaction(sig, &sa, NULL);
141 /* Don't limit the core dump size */
142 rl.rlim_cur = RLIM_INFINITY;
143 rl.rlim_max = RLIM_INFINITY;
144 setrlimit(RLIMIT_CORE, &rl);
146 /* Just to be sure... */
149 /* Raise the signal again */
152 assert_not_reached("We shouldn't be here...");
159 /* Order things nicely. */
160 r = wait_for_terminate(pid, &status);
162 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
163 else if (status.si_code != CLD_DUMPED)
164 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
166 log_error("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
171 chvt(arg_crash_chvt);
173 if (arg_crash_shell) {
174 struct sigaction sa = {
175 .sa_handler = SIG_IGN,
176 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
180 log_info("Executing crash shell in 10s...");
183 /* Let the kernel reap children for us */
184 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
188 log_error("Failed to fork off crash shell: %m");
190 make_console_stdio();
191 execl("/bin/sh", "/bin/sh", NULL);
193 log_error("execl() failed: %m");
197 log_info("Successfully spawned crash shell as pid "PID_FMT".", pid);
200 log_info("Freezing execution.");
204 static void install_crash_handler(void) {
205 struct sigaction sa = {
207 .sa_flags = SA_NODEFER,
210 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
213 static int console_setup(bool do_reset) {
216 /* If we are init, we connect stdin/stdout/stderr to /dev/null
217 * and make sure we don't have a controlling tty. */
224 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
226 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
230 /* We don't want to force text mode.
231 * plymouth may be showing pictures already from initrd. */
232 r = reset_terminal_fd(tty_fd, false);
234 log_error("Failed to reset /dev/console: %s", strerror(-r));
236 close_nointr_nofail(tty_fd);
240 static int set_default_unit(const char *u) {
249 free(arg_default_unit);
250 arg_default_unit = c;
255 static int parse_proc_cmdline_word(const char *word) {
257 static const char * const rlmap[] = {
258 "emergency", SPECIAL_EMERGENCY_TARGET,
259 "-b", SPECIAL_EMERGENCY_TARGET,
260 "single", SPECIAL_RESCUE_TARGET,
261 "-s", SPECIAL_RESCUE_TARGET,
262 "s", SPECIAL_RESCUE_TARGET,
263 "S", SPECIAL_RESCUE_TARGET,
264 "1", SPECIAL_RESCUE_TARGET,
265 "2", SPECIAL_RUNLEVEL2_TARGET,
266 "3", SPECIAL_RUNLEVEL3_TARGET,
267 "4", SPECIAL_RUNLEVEL4_TARGET,
268 "5", SPECIAL_RUNLEVEL5_TARGET,
273 if (startswith(word, "systemd.unit=")) {
276 return set_default_unit(word + 13);
278 } else if (startswith(word, "rd.systemd.unit=")) {
281 return set_default_unit(word + 16);
283 } else if (startswith(word, "systemd.log_target=")) {
285 if (log_set_target_from_string(word + 19) < 0)
286 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
288 } else if (startswith(word, "systemd.log_level=")) {
290 if (log_set_max_level_from_string(word + 18) < 0)
291 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
293 } else if (startswith(word, "systemd.log_color=")) {
295 if (log_show_color_from_string(word + 18) < 0)
296 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
298 } else if (startswith(word, "systemd.log_location=")) {
300 if (log_show_location_from_string(word + 21) < 0)
301 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
303 } else if (startswith(word, "systemd.dump_core=")) {
306 if ((r = parse_boolean(word + 18)) < 0)
307 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
311 } else if (startswith(word, "systemd.crash_shell=")) {
314 if ((r = parse_boolean(word + 20)) < 0)
315 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
319 } else if (startswith(word, "systemd.confirm_spawn=")) {
322 if ((r = parse_boolean(word + 22)) < 0)
323 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
325 arg_confirm_spawn = r;
327 } else if (startswith(word, "systemd.crash_chvt=")) {
330 if (safe_atoi(word + 19, &k) < 0)
331 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
335 } else if (startswith(word, "systemd.show_status=")) {
338 r = parse_show_status(word + 20, &arg_show_status);
340 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
341 } else if (startswith(word, "systemd.default_standard_output=")) {
344 if ((r = exec_output_from_string(word + 32)) < 0)
345 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
347 arg_default_std_output = r;
348 } else if (startswith(word, "systemd.default_standard_error=")) {
351 if ((r = exec_output_from_string(word + 31)) < 0)
352 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
354 arg_default_std_error = r;
355 } else if (startswith(word, "systemd.setenv=")) {
356 _cleanup_free_ char *cenv = NULL;
358 cenv = strdup(word + 15);
362 if (env_assignment_is_valid(cenv)) {
365 env = strv_env_set(arg_default_environment, cenv);
367 arg_default_environment = env;
369 log_warning("Setting environment variable '%s' failed, ignoring: %m", cenv);
371 log_warning("Environment variable name '%s' is not valid. Ignoring.", cenv);
373 } else if (startswith(word, "systemd.") ||
374 (in_initrd() && startswith(word, "rd.systemd."))) {
378 /* Ignore systemd.journald.xyz and friends */
380 if (startswith(c, "rd."))
382 if (startswith(c, "systemd."))
384 if (c[strcspn(c, ".=")] != '.') {
386 log_warning("Unknown kernel switch %s. Ignoring.", word);
388 log_info("Supported kernel switches:\n"
389 "systemd.unit=UNIT Default unit to start\n"
390 "rd.systemd.unit=UNIT Default unit to start when run in initrd\n"
391 "systemd.dump_core=0|1 Dump core on crash\n"
392 "systemd.crash_shell=0|1 Run shell on crash\n"
393 "systemd.crash_chvt=N Change to VT #N on crash\n"
394 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
395 "systemd.show_status=0|1|auto Show status updates on the console during bootup\n"
396 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
398 "systemd.log_level=LEVEL Log level\n"
399 "systemd.log_color=0|1 Highlight important log messages\n"
400 "systemd.log_location=0|1 Include code location in log messages\n"
401 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
402 " Set default log output for services\n"
403 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
404 " Set default log error output for services\n"
405 "systemd.setenv=ASSIGNMENT Set an environment variable for all spawned processes\n");
408 } else if (streq(word, "quiet")) {
409 if (arg_show_status == SHOW_STATUS_UNSET)
410 arg_show_status = SHOW_STATUS_AUTO;
411 } else if (streq(word, "debug")) {
412 /* Log to kmsg, the journal socket will fill up before the
413 * journal is started and tools running during that time
414 * will block with every log message for for 60 seconds,
415 * before they give up. */
416 log_set_max_level(LOG_DEBUG);
417 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_KMSG);
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 unsigned section_line, \
436 const char *lvalue, \
438 const char *rvalue, \
450 log_syntax(unit, LOG_ERR, filename, line, -r, \
451 "Invalid " descr "'%s': %s", \
452 rvalue, strerror(-r)); \
457 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
458 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
459 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
460 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,
466 unsigned section_line,
483 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
488 if (!(t = strndup(w, l)))
491 r = safe_atou(t, &cpu);
495 if (!(c = cpu_set_malloc(&ncpus)))
498 if (r < 0 || cpu >= ncpus) {
499 log_syntax(unit, LOG_ERR, filename, line, -r,
500 "Failed to parse CPU affinity '%s'", rvalue);
505 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
509 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
510 log_warning_unit(unit, "Failed to set CPU affinity: %m");
518 static void strv_free_free(char ***l) {
530 static void free_join_controllers(void) {
531 strv_free_free(arg_join_controllers);
532 arg_join_controllers = NULL;
535 static int config_parse_join_controllers(const char *unit,
536 const char *filename,
539 unsigned section_line,
554 free_join_controllers();
556 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
559 s = strndup(w, length);
563 l = strv_split(s, ",");
568 if (strv_length(l) <= 1) {
573 if (!arg_join_controllers) {
574 arg_join_controllers = new(char**, 2);
575 if (!arg_join_controllers) {
580 arg_join_controllers[0] = l;
581 arg_join_controllers[1] = NULL;
588 t = new0(char**, n+2);
596 for (a = arg_join_controllers; *a; a++) {
598 if (strv_overlap(*a, l)) {
599 if (strv_extend_strv(&l, *a) < 0) {
619 t[n++] = strv_uniq(l);
621 strv_free_free(arg_join_controllers);
622 arg_join_controllers = t;
629 static int parse_config_file(void) {
631 const ConfigTableItem items[] = {
632 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
633 { "Manager", "LogTarget", config_parse_target, 0, NULL },
634 { "Manager", "LogColor", config_parse_color, 0, NULL },
635 { "Manager", "LogLocation", config_parse_location, 0, NULL },
636 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
637 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
638 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
639 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
640 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
641 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
642 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
643 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
644 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
645 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
646 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
647 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
648 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
649 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
650 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
651 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
652 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
653 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
654 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
655 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
656 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
657 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
658 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
659 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
660 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
661 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
662 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
663 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
664 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
665 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
666 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
667 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
668 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
669 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
670 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
674 _cleanup_fclose_ FILE *f;
678 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
684 log_warning("Failed to open configuration file '%s': %m", fn);
688 r = config_parse(NULL, fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, false, NULL);
690 log_warning("Failed to parse configuration file: %s", strerror(-r));
695 static int parse_proc_cmdline(void) {
696 _cleanup_free_ char *line = NULL;
701 r = 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,
743 ARG_DEFAULT_STD_OUTPUT,
744 ARG_DEFAULT_STD_ERROR
747 static const struct option options[] = {
748 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
749 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
750 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
751 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
752 { "unit", required_argument, NULL, ARG_UNIT },
753 { "system", no_argument, NULL, ARG_SYSTEM },
754 { "user", no_argument, NULL, ARG_USER },
755 { "test", no_argument, NULL, ARG_TEST },
756 { "help", no_argument, NULL, 'h' },
757 { "version", no_argument, NULL, ARG_VERSION },
758 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
759 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
760 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
761 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
762 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
763 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
764 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
765 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
766 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
778 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
783 if ((r = log_set_max_level_from_string(optarg)) < 0) {
784 log_error("Failed to parse log level %s.", optarg);
792 if ((r = log_set_target_from_string(optarg)) < 0) {
793 log_error("Failed to parse log target %s.", optarg);
802 if ((r = log_show_color_from_string(optarg)) < 0) {
803 log_error("Failed to parse log color setting %s.", optarg);
807 log_show_color(true);
811 case ARG_LOG_LOCATION:
814 if ((r = log_show_location_from_string(optarg)) < 0) {
815 log_error("Failed to parse log location setting %s.", optarg);
819 log_show_location(true);
823 case ARG_DEFAULT_STD_OUTPUT:
825 if ((r = exec_output_from_string(optarg)) < 0) {
826 log_error("Failed to parse default standard output setting %s.", optarg);
829 arg_default_std_output = r;
832 case ARG_DEFAULT_STD_ERROR:
834 if ((r = exec_output_from_string(optarg)) < 0) {
835 log_error("Failed to parse default standard error output setting %s.", optarg);
838 arg_default_std_error = r;
843 if ((r = set_default_unit(optarg)) < 0) {
844 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
851 arg_running_as = SYSTEMD_SYSTEM;
855 arg_running_as = SYSTEMD_USER;
859 arg_action = ACTION_TEST;
863 arg_action = ACTION_VERSION;
866 case ARG_DUMP_CONFIGURATION_ITEMS:
867 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
871 r = optarg ? parse_boolean(optarg) : 1;
873 log_error("Failed to parse dump core boolean %s.", optarg);
879 case ARG_CRASH_SHELL:
880 r = optarg ? parse_boolean(optarg) : 1;
882 log_error("Failed to parse crash shell boolean %s.", optarg);
888 case ARG_CONFIRM_SPAWN:
889 r = optarg ? parse_boolean(optarg) : 1;
891 log_error("Failed to parse confirm spawn boolean %s.", optarg);
894 arg_confirm_spawn = r;
897 case ARG_SHOW_STATUS:
899 r = parse_show_status(optarg, &arg_show_status);
901 log_error("Failed to parse show status boolean %s.", optarg);
905 arg_show_status = SHOW_STATUS_YES;
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");
926 if (arg_serialization)
927 fclose(arg_serialization);
929 arg_serialization = f;
934 case ARG_SWITCHED_ROOT:
935 arg_switched_root = true;
939 arg_action = ACTION_HELP;
943 log_set_max_level(LOG_DEBUG);
949 /* Just to eat away the sysvinit kernel
950 * cmdline args without getopt() error
951 * messages that we'll parse in
952 * parse_proc_cmdline_word() or ignore. */
957 log_error("Unknown option code %c", c);
964 if (optind < argc && getpid() != 1) {
965 /* Hmm, when we aren't run as init system
966 * let's complain about excess arguments */
968 log_error("Excess arguments.");
972 if (detect_container(NULL) > 0) {
975 /* All /proc/cmdline arguments the kernel didn't
976 * understand it passed to us. We're not really
977 * interested in that usually since /proc/cmdline is
978 * more interesting and complete. With one exception:
979 * if we are run in a container /proc/cmdline is not
980 * relevant for the container, hence we rely on argv[]
983 for (a = argv; a < argv + argc; a++) {
984 r = parse_proc_cmdline_word(*a);
986 log_error("Failed on cmdline argument %s: %s", *a, strerror(-r));
995 static int help(void) {
997 printf("%s [OPTIONS...]\n\n"
998 "Starts up and maintains the system or user services.\n\n"
999 " -h --help Show this help\n"
1000 " --test Determine startup sequence, dump it and exit\n"
1001 " --dump-configuration-items Dump understood unit configuration items\n"
1002 " --unit=UNIT Set default unit\n"
1003 " --system Run a system instance, even if PID != 1\n"
1004 " --user Run a user instance\n"
1005 " --dump-core[=0|1] Dump core on crash\n"
1006 " --crash-shell[=0|1] Run shell on crash\n"
1007 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
1008 " --show-status[=0|1] Show status updates on the console during bootup\n"
1009 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1010 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1011 " --log-color[=0|1] Highlight important log messages\n"
1012 " --log-location[=0|1] Include code location in log messages\n"
1013 " --default-standard-output= Set default standard output for services\n"
1014 " --default-standard-error= Set default standard error output for services\n",
1015 program_invocation_short_name);
1020 static int version(void) {
1021 puts(PACKAGE_STRING);
1022 puts(SYSTEMD_FEATURES);
1027 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
1036 r = manager_open_serialization(m, &f);
1038 log_error("Failed to create serialization file: %s", strerror(-r));
1042 /* Make sure nothing is really destructed when we shut down */
1044 bus_manager_send_reloading(m, true);
1049 log_error("Failed to allocate fd set: %s", strerror(-r));
1053 r = manager_serialize(m, f, fds, switching_root);
1055 log_error("Failed to serialize state: %s", strerror(-r));
1059 if (fseeko(f, 0, SEEK_SET) < 0) {
1060 log_error("Failed to rewind serialization fd: %m");
1064 r = fd_cloexec(fileno(f), false);
1066 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1070 r = fdset_cloexec(fds, false);
1072 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1090 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1094 assert(saved_rlimit);
1096 /* Save the original RLIMIT_NOFILE so that we can reset it
1097 * later when transitioning from the initrd to the main
1098 * systemd or suchlike. */
1099 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0) {
1100 log_error("Reading RLIMIT_NOFILE failed: %m");
1104 /* Make sure forked processes get the default kernel setting */
1105 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1108 rl = newdup(struct rlimit, saved_rlimit, 1);
1112 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1115 /* Bump up the resource limit for ourselves substantially */
1116 nl.rlim_cur = nl.rlim_max = 64*1024;
1117 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1119 log_error("Setting RLIMIT_NOFILE failed: %s", strerror(-r));
1126 static void test_mtab(void) {
1129 /* Check that /etc/mtab is a symlink */
1131 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1134 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1141 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1142 "This is not supported anymore. "
1143 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1146 static void test_usr(void) {
1148 /* Check that /usr is not a separate fs */
1150 if (dir_is_empty("/usr") <= 0)
1153 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1154 "Some things will probably break (sometimes even silently) in mysterious ways. "
1155 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1158 static void test_cgroups(void) {
1160 if (access("/proc/cgroups", F_OK) >= 0)
1163 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1164 "Systems without control groups are not supported. "
1165 "We will now sleep for 10s, and then continue boot-up. "
1166 "Expect breakage and please do not file bugs. "
1167 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1168 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1173 static int initialize_join_controllers(void) {
1174 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1175 * + "net_prio". We'd like to add "cpuset" to the mix, but
1176 * "cpuset" does't really work for groups with no initialized
1179 arg_join_controllers = new(char**, 3);
1180 if (!arg_join_controllers)
1183 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1184 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1185 arg_join_controllers[2] = NULL;
1187 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1188 free_join_controllers();
1195 static int enforce_syscall_archs(Set *archs) {
1197 scmp_filter_ctx *seccomp;
1202 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1206 SET_FOREACH(id, arg_syscall_archs, i) {
1207 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1211 log_error("Failed to add architecture to seccomp: %s", strerror(-r));
1216 r = seccomp_load(seccomp);
1218 log_error("Failed to add install architecture seccomp: %s", strerror(-r));
1221 seccomp_release(seccomp);
1228 int main(int argc, char *argv[]) {
1230 int r, retval = EXIT_FAILURE;
1231 usec_t before_startup, after_startup;
1232 char timespan[FORMAT_TIMESPAN_MAX];
1234 bool reexecute = false;
1235 const char *shutdown_verb = NULL;
1236 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1237 dual_timestamp userspace_timestamp = { 0ULL, 0ULL };
1238 dual_timestamp kernel_timestamp = { 0ULL, 0ULL };
1239 dual_timestamp security_start_timestamp = { 0ULL, 0ULL };
1240 dual_timestamp security_finish_timestamp = { 0ULL, 0ULL };
1241 static char systemd[] = "systemd";
1242 bool skip_setup = false;
1244 bool loaded_policy = false;
1245 bool arm_reboot_watchdog = false;
1246 bool queue_default_job = false;
1247 char *switch_root_dir = NULL, *switch_root_init = NULL;
1248 static struct rlimit saved_rlimit_nofile = { 0, 0 };
1250 #ifdef HAVE_SYSV_COMPAT
1251 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1252 /* This is compatibility support for SysV, where
1253 * calling init as a user is identical to telinit. */
1256 execv(SYSTEMCTL_BINARY_PATH, argv);
1257 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1262 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1263 dual_timestamp_get(&userspace_timestamp);
1265 /* Determine if this is a reexecution or normal bootup. We do
1266 * the full command line parsing much later, so let's just
1267 * have a quick peek here. */
1268 if (strv_find(argv+1, "--deserialize"))
1271 /* If we have switched root, do all the special setup
1273 if (strv_find(argv+1, "--switched-root"))
1276 /* If we get started via the /sbin/init symlink then we are
1277 called 'init'. After a subsequent reexecution we are then
1278 called 'systemd'. That is confusing, hence let's call us
1279 systemd right-away. */
1280 program_invocation_short_name = systemd;
1281 prctl(PR_SET_NAME, systemd);
1286 log_show_color(isatty(STDERR_FILENO) > 0);
1288 /* Disable the umask logic */
1292 if (getpid() == 1 && detect_container(NULL) <= 0) {
1294 /* Running outside of a container as PID 1 */
1295 arg_running_as = SYSTEMD_SYSTEM;
1297 log_set_target(LOG_TARGET_KMSG);
1301 initrd_timestamp = userspace_timestamp;
1304 mount_setup_early();
1305 dual_timestamp_get(&security_start_timestamp);
1306 if (selinux_setup(&loaded_policy) < 0)
1308 if (ima_setup() < 0)
1310 if (smack_setup() < 0)
1312 dual_timestamp_get(&security_finish_timestamp);
1315 if (label_init(NULL) < 0)
1319 if (hwclock_is_localtime() > 0) {
1322 /* The first-time call to settimeofday() does a time warp in the kernel */
1323 r = hwclock_set_timezone(&min);
1325 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1327 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1328 } else if (!in_initrd()) {
1330 * Do dummy first-time call to seal the kernel's time warp magic
1332 * Do not call this this from inside the initrd. The initrd might not
1333 * carry /etc/adjtime with LOCAL, but the real system could be set up
1334 * that way. In such case, we need to delay the time-warp or the sealing
1335 * until we reach the real system.
1337 hwclock_reset_timezone();
1339 /* Tell the kernel our timezone */
1340 r = hwclock_set_timezone(NULL);
1342 log_error("Failed to set the kernel's timezone, ignoring: %s", strerror(-r));
1346 /* Set the default for later on, but don't actually
1347 * open the logs like this for now. Note that if we
1348 * are transitioning from the initrd there might still
1349 * be journal fd open, and we shouldn't attempt
1350 * opening that before we parsed /proc/cmdline which
1351 * might redirect output elsewhere. */
1352 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1354 } else if (getpid() == 1) {
1355 /* Running inside a container, as PID 1 */
1356 arg_running_as = SYSTEMD_SYSTEM;
1357 log_set_target(LOG_TARGET_CONSOLE);
1358 log_close_console(); /* force reopen of /dev/console */
1361 /* For the later on, see above... */
1362 log_set_target(LOG_TARGET_JOURNAL);
1364 /* clear the kernel timestamp,
1365 * because we are in a container */
1366 kernel_timestamp.monotonic = 0ULL;
1367 kernel_timestamp.realtime = 0ULL;
1370 /* Running as user instance */
1371 arg_running_as = SYSTEMD_USER;
1372 log_set_target(LOG_TARGET_AUTO);
1375 /* clear the kernel timestamp,
1376 * because we are not PID 1 */
1377 kernel_timestamp.monotonic = 0ULL;
1378 kernel_timestamp.realtime = 0ULL;
1381 /* Initialize default unit */
1382 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1384 log_error("Failed to set default unit %s: %s", SPECIAL_DEFAULT_TARGET, strerror(-r));
1388 r = initialize_join_controllers();
1392 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1393 * /proc/$PID/fd is available. */
1394 if (getpid() == 1) {
1395 r = mount_setup(loaded_policy);
1400 /* Reset all signal handlers. */
1401 assert_se(reset_all_signal_handlers() == 0);
1403 ignore_signals(SIGNALS_IGNORE, -1);
1405 if (parse_config_file() < 0)
1408 if (arg_running_as == SYSTEMD_SYSTEM)
1409 if (parse_proc_cmdline() < 0)
1412 log_parse_environment();
1414 if (parse_argv(argc, argv) < 0)
1417 if (arg_action == ACTION_TEST &&
1419 log_error("Don't run test mode as root.");
1423 if (arg_running_as == SYSTEMD_USER &&
1424 arg_action == ACTION_RUN &&
1426 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1430 if (arg_running_as == SYSTEMD_SYSTEM &&
1431 arg_action == ACTION_RUN &&
1432 running_in_chroot() > 0) {
1433 log_error("Cannot be run in a chroot() environment.");
1437 if (arg_action == ACTION_HELP) {
1440 } else if (arg_action == ACTION_VERSION) {
1443 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1444 unit_dump_config_items(stdout);
1445 retval = EXIT_SUCCESS;
1447 } else if (arg_action == ACTION_DONE) {
1448 retval = EXIT_SUCCESS;
1452 if (arg_running_as == SYSTEMD_USER &&
1453 !getenv("XDG_RUNTIME_DIR")) {
1454 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1458 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1460 /* Close logging fds, in order not to confuse fdset below */
1463 /* Remember open file descriptors for later deserialization */
1464 r = fdset_new_fill(&fds);
1466 log_error("Failed to allocate fd set: %s", strerror(-r));
1469 fdset_cloexec(fds, true);
1471 if (arg_serialization)
1472 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1474 if (arg_running_as == SYSTEMD_SYSTEM)
1475 /* Become a session leader if we aren't one yet. */
1478 /* Move out of the way, so that we won't block unmounts */
1479 assert_se(chdir("/") == 0);
1481 /* Reset the console, but only if this is really init and we
1482 * are freshly booted */
1483 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN)
1484 console_setup(getpid() == 1 && !skip_setup);
1486 /* Open the logging devices, if possible and necessary */
1489 /* Make sure we leave a core dump without panicing the
1491 if (getpid() == 1) {
1492 install_crash_handler();
1494 r = mount_cgroup_controllers(arg_join_controllers);
1499 if (arg_running_as == SYSTEMD_SYSTEM) {
1500 const char *virtualization = NULL;
1502 log_info(PACKAGE_STRING " running in system mode. (" SYSTEMD_FEATURES ")");
1504 detect_virtualization(&virtualization);
1506 log_info("Detected virtualization '%s'.", virtualization);
1509 log_info("Running in initial RAM disk.");
1512 _cleanup_free_ char *t = uid_to_name(getuid());
1513 log_debug(PACKAGE_STRING " running in user mode for user "PID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1517 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1518 if (arg_show_status > 0 || plymouth_running())
1522 if (detect_container(NULL) <= 0)
1534 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1535 watchdog_set_timeout(&arg_runtime_watchdog);
1537 if (arg_timer_slack_nsec != (nsec_t) -1)
1538 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1539 log_error("Failed to adjust timer slack: %m");
1541 if (arg_capability_bounding_set_drop) {
1542 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1544 log_error("Failed to drop capability bounding set of usermode helpers: %s", strerror(-r));
1547 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1549 log_error("Failed to drop capability bounding set: %s", strerror(-r));
1554 if (arg_syscall_archs) {
1555 r = enforce_syscall_archs(arg_syscall_archs);
1560 if (arg_running_as == SYSTEMD_USER) {
1561 /* Become reaper of our children */
1562 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1563 log_warning("Failed to make us a subreaper: %m");
1564 if (errno == EINVAL)
1565 log_info("Perhaps the kernel version is too old (< 3.4?)");
1569 if (arg_running_as == SYSTEMD_SYSTEM)
1570 bump_rlimit_nofile(&saved_rlimit_nofile);
1572 r = manager_new(arg_running_as, &m);
1574 log_error("Failed to allocate manager object: %s", strerror(-r));
1578 m->confirm_spawn = arg_confirm_spawn;
1579 m->default_std_output = arg_default_std_output;
1580 m->default_std_error = arg_default_std_error;
1581 m->default_restart_usec = arg_default_restart_usec;
1582 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1583 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1584 m->default_start_limit_interval = arg_default_start_limit_interval;
1585 m->default_start_limit_burst = arg_default_start_limit_burst;
1586 m->runtime_watchdog = arg_runtime_watchdog;
1587 m->shutdown_watchdog = arg_shutdown_watchdog;
1588 m->userspace_timestamp = userspace_timestamp;
1589 m->kernel_timestamp = kernel_timestamp;
1590 m->initrd_timestamp = initrd_timestamp;
1591 m->security_start_timestamp = security_start_timestamp;
1592 m->security_finish_timestamp = security_finish_timestamp;
1594 manager_set_default_rlimits(m, arg_default_rlimit);
1596 if (arg_default_environment)
1597 manager_environment_add(m, NULL, arg_default_environment);
1599 if (arg_show_status == SHOW_STATUS_UNSET)
1600 arg_show_status = SHOW_STATUS_YES;
1601 manager_set_show_status(m, arg_show_status);
1603 /* Remember whether we should queue the default job */
1604 queue_default_job = !arg_serialization || arg_switched_root;
1606 before_startup = now(CLOCK_MONOTONIC);
1608 r = manager_startup(m, arg_serialization, fds);
1610 log_error("Failed to fully start up daemon: %s", strerror(-r));
1612 /* This will close all file descriptors that were opened, but
1613 * not claimed by any unit. */
1617 if (arg_serialization) {
1618 fclose(arg_serialization);
1619 arg_serialization = NULL;
1622 if (queue_default_job) {
1623 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1624 Unit *target = NULL;
1625 Job *default_unit_job;
1627 log_debug("Activating default unit: %s", arg_default_unit);
1629 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1631 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1632 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1633 log_error("Failed to load default target: %s", strerror(-target->load_error));
1634 else if (target->load_state == UNIT_MASKED)
1635 log_error("Default target masked.");
1637 if (!target || target->load_state != UNIT_LOADED) {
1638 log_info("Trying to load rescue target...");
1640 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1642 log_error("Failed to load rescue target: %s", bus_error_message(&error, r));
1644 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1645 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1647 } else if (target->load_state == UNIT_MASKED) {
1648 log_error("Rescue target masked.");
1653 assert(target->load_state == UNIT_LOADED);
1655 if (arg_action == ACTION_TEST) {
1656 printf("-> By units:\n");
1657 manager_dump_units(m, stdout, "\t");
1660 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1662 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1664 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1666 log_error("Failed to start default target: %s", bus_error_message(&error, r));
1670 log_error("Failed to isolate default target: %s", bus_error_message(&error, r));
1674 m->default_unit_job_id = default_unit_job->id;
1676 after_startup = now(CLOCK_MONOTONIC);
1677 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1678 "Loaded units and determined initial transaction in %s.",
1679 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 0));
1681 if (arg_action == ACTION_TEST) {
1682 printf("-> By jobs:\n");
1683 manager_dump_jobs(m, stdout, "\t");
1684 retval = EXIT_SUCCESS;
1690 r = manager_loop(m);
1692 log_error("Failed to run mainloop: %s", strerror(-r));
1696 switch (m->exit_code) {
1699 retval = EXIT_SUCCESS;
1703 case MANAGER_RELOAD:
1704 log_info("Reloading.");
1705 r = manager_reload(m);
1707 log_error("Failed to reload: %s", strerror(-r));
1710 case MANAGER_REEXECUTE:
1712 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0)
1716 log_notice("Reexecuting.");
1719 case MANAGER_SWITCH_ROOT:
1720 /* Steal the switch root parameters */
1721 switch_root_dir = m->switch_root;
1722 switch_root_init = m->switch_root_init;
1723 m->switch_root = m->switch_root_init = NULL;
1725 if (!switch_root_init)
1726 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0)
1730 log_notice("Switching root.");
1733 case MANAGER_REBOOT:
1734 case MANAGER_POWEROFF:
1736 case MANAGER_KEXEC: {
1737 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1738 [MANAGER_REBOOT] = "reboot",
1739 [MANAGER_POWEROFF] = "poweroff",
1740 [MANAGER_HALT] = "halt",
1741 [MANAGER_KEXEC] = "kexec"
1744 assert_se(shutdown_verb = table[m->exit_code]);
1745 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1747 log_notice("Shutting down.");
1752 assert_not_reached("Unknown exit code.");
1762 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1763 free(arg_default_rlimit[j]);
1764 arg_default_rlimit[j] = NULL;
1767 free(arg_default_unit);
1768 arg_default_unit = NULL;
1770 free_join_controllers();
1772 strv_free(arg_default_environment);
1773 arg_default_environment = NULL;
1775 set_free(arg_syscall_archs);
1776 arg_syscall_archs = NULL;
1782 unsigned i, args_size;
1784 /* Close and disarm the watchdog, so that the new
1785 * instance can reinitialize it, but doesn't get
1786 * rebooted while we do that */
1787 watchdog_close(true);
1789 /* Reset the RLIMIT_NOFILE to the kernel default, so
1790 * that the new systemd can pass the kernel default to
1791 * its child processes */
1792 if (saved_rlimit_nofile.rlim_cur > 0)
1793 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1795 if (switch_root_dir) {
1796 /* Kill all remaining processes from the
1797 * initrd, but don't wait for them, so that we
1798 * can handle the SIGCHLD for them after
1800 broadcast_signal(SIGTERM, false, true);
1802 /* And switch root */
1803 r = switch_root(switch_root_dir);
1805 log_error("Failed to switch root, ignoring: %s", strerror(-r));
1808 args_size = MAX(6, argc+1);
1809 args = newa(const char*, args_size);
1811 if (!switch_root_init) {
1814 /* First try to spawn ourselves with the right
1815 * path, and with full serialization. We do
1816 * this only if the user didn't specify an
1817 * explicit init to spawn. */
1819 assert(arg_serialization);
1822 snprintf(sfd, sizeof(sfd), "%i", fileno(arg_serialization));
1826 args[i++] = SYSTEMD_BINARY_PATH;
1827 if (switch_root_dir)
1828 args[i++] = "--switched-root";
1829 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1830 args[i++] = "--deserialize";
1834 /* do not pass along the environment we inherit from the kernel or initrd */
1835 if (switch_root_dir)
1838 assert(i <= args_size);
1839 execv(args[0], (char* const*) args);
1842 /* Try the fallback, if there is any, without any
1843 * serialization. We pass the original argv[] and
1844 * envp[]. (Well, modulo the ordering changes due to
1845 * getopt() in argv[], and some cleanups in envp[],
1846 * but let's hope that doesn't matter.) */
1848 if (arg_serialization) {
1849 fclose(arg_serialization);
1850 arg_serialization = NULL;
1858 /* Reopen the console */
1859 make_console_stdio();
1861 for (j = 1, i = 1; j < (unsigned) argc; j++)
1862 args[i++] = argv[j];
1864 assert(i <= args_size);
1866 if (switch_root_init) {
1867 args[0] = switch_root_init;
1868 execv(args[0], (char* const*) args);
1869 log_warning("Failed to execute configured init, trying fallback: %m");
1872 args[0] = "/sbin/init";
1873 execv(args[0], (char* const*) args);
1875 if (errno == ENOENT) {
1876 log_warning("No /sbin/init, trying fallback");
1878 args[0] = "/bin/sh";
1880 execv(args[0], (char* const*) args);
1881 log_error("Failed to execute /bin/sh, giving up: %m");
1883 log_warning("Failed to execute /sbin/init, giving up: %m");
1886 if (arg_serialization) {
1887 fclose(arg_serialization);
1888 arg_serialization = NULL;
1896 #ifdef HAVE_VALGRIND_VALGRIND_H
1897 /* If we are PID 1 and running under valgrind, then let's exit
1898 * here explicitly. valgrind will only generate nice output on
1899 * exit(), not on exec(), hence let's do the former not the
1901 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1905 if (shutdown_verb) {
1906 const char * command_line[] = {
1907 SYSTEMD_SHUTDOWN_BINARY_PATH,
1911 _cleanup_strv_free_ char **env_block = NULL;
1912 env_block = strv_copy(environ);
1914 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1917 /* If we reboot let's set the shutdown
1918 * watchdog and tell the shutdown binary to
1919 * repeatedly ping it */
1920 watchdog_set_timeout(&arg_shutdown_watchdog);
1921 watchdog_close(false);
1923 /* Tell the binary how often to ping, ignore failure */
1924 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
1925 strv_push(&env_block, e);
1927 watchdog_close(true);
1929 /* Avoid the creation of new processes forked by the
1930 * kernel; at this point, we will not listen to the
1932 if (detect_container(NULL) <= 0)
1933 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
1935 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1936 log_error("Failed to execute shutdown binary, freezing: %m");