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>
42 #include "sd-daemon.h"
43 #include "sd-messages.h"
48 #include "conf-parser.h"
56 #include "architecture.h"
58 #include "path-util.h"
59 #include "switch-root.h"
60 #include "capability.h"
63 #include "clock-util.h"
65 #include "bus-error.h"
67 #include "selinux-util.h"
69 #include "dbus-manager.h"
70 #include "load-fragment.h"
72 #include "mount-setup.h"
73 #include "loopback-setup.h"
74 #include "hostname-setup.h"
75 #include "machine-id-setup.h"
76 #include "selinux-setup.h"
77 #include "ima-setup.h"
78 #include "smack-setup.h"
79 #include "kmod-setup.h"
86 ACTION_DUMP_CONFIGURATION_ITEMS,
88 } arg_action = ACTION_RUN;
89 static char *arg_default_unit = NULL;
90 static SystemdRunningAs arg_running_as = _SYSTEMD_RUNNING_AS_INVALID;
91 static bool arg_dump_core = true;
92 static bool arg_crash_shell = false;
93 static int arg_crash_chvt = -1;
94 static bool arg_confirm_spawn = false;
95 static ShowStatus arg_show_status = _SHOW_STATUS_UNSET;
96 static bool arg_switched_root = false;
97 static int arg_no_pager = -1;
98 static char ***arg_join_controllers = NULL;
99 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
100 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
101 static usec_t arg_default_restart_usec = DEFAULT_RESTART_USEC;
102 static usec_t arg_default_timeout_start_usec = DEFAULT_TIMEOUT_USEC;
103 static usec_t arg_default_timeout_stop_usec = DEFAULT_TIMEOUT_USEC;
104 static usec_t arg_default_start_limit_interval = DEFAULT_START_LIMIT_INTERVAL;
105 static unsigned arg_default_start_limit_burst = DEFAULT_START_LIMIT_BURST;
106 static usec_t arg_runtime_watchdog = 0;
107 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
108 static char **arg_default_environment = NULL;
109 static struct rlimit *arg_default_rlimit[_RLIMIT_MAX] = {};
110 static uint64_t arg_capability_bounding_set_drop = 0;
111 static nsec_t arg_timer_slack_nsec = NSEC_INFINITY;
112 static usec_t arg_default_timer_accuracy_usec = 1 * USEC_PER_MINUTE;
113 static Set* arg_syscall_archs = NULL;
114 static FILE* arg_serialization = NULL;
115 static bool arg_default_cpu_accounting = false;
116 static bool arg_default_blockio_accounting = false;
117 static bool arg_default_memory_accounting = false;
119 static void nop_handler(int sig) {}
121 static void pager_open_if_enabled(void) {
123 if (arg_no_pager <= 0)
129 noreturn static void crash(int sig) {
132 /* Pass this on immediately, if this is not PID 1 */
134 else if (!arg_dump_core)
135 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
137 struct sigaction sa = {
138 .sa_handler = nop_handler,
139 .sa_flags = SA_NOCLDSTOP|SA_RESTART,
143 /* We want to wait for the core process, hence let's enable SIGCHLD */
144 sigaction(SIGCHLD, &sa, NULL);
146 pid = raw_clone(SIGCHLD, NULL);
148 log_emergency_errno(errno, "Caught <%s>, cannot fork for core dump: %m", signal_to_string(sig));
151 struct rlimit rl = {};
153 /* Enable default signal handler for core dump */
155 sa.sa_handler = SIG_DFL;
156 sigaction(sig, &sa, NULL);
158 /* Don't limit the core dump size */
159 rl.rlim_cur = RLIM_INFINITY;
160 rl.rlim_max = RLIM_INFINITY;
161 setrlimit(RLIMIT_CORE, &rl);
163 /* Just to be sure... */
166 /* Raise the signal again */
168 kill(pid, sig); /* raise() would kill the parent */
170 assert_not_reached("We shouldn't be here...");
176 /* Order things nicely. */
177 r = wait_for_terminate(pid, &status);
179 log_emergency_errno(r, "Caught <%s>, waitpid() failed: %m", signal_to_string(sig));
180 else if (status.si_code != CLD_DUMPED)
181 log_emergency("Caught <%s>, core dump failed (child "PID_FMT", code=%s, status=%i/%s).",
182 signal_to_string(sig),
183 pid, sigchld_code_to_string(status.si_code),
185 strna(status.si_code == CLD_EXITED
186 ? exit_status_to_string(status.si_status, EXIT_STATUS_FULL)
187 : signal_to_string(status.si_status)));
189 log_emergency("Caught <%s>, dumped core as pid "PID_FMT".", signal_to_string(sig), pid);
194 chvt(arg_crash_chvt);
196 if (arg_crash_shell) {
197 struct sigaction sa = {
198 .sa_handler = SIG_IGN,
199 .sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART,
203 log_info("Executing crash shell in 10s...");
206 /* Let the kernel reap children for us */
207 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
209 pid = raw_clone(SIGCHLD, NULL);
211 log_emergency_errno(errno, "Failed to fork off crash shell: %m");
213 make_console_stdio();
214 execle("/bin/sh", "/bin/sh", NULL, environ);
216 log_emergency_errno(errno, "execle() failed: %m");
219 log_info("Successfully spawned crash shell as PID "PID_FMT".", pid);
222 log_emergency("Freezing execution.");
226 static void install_crash_handler(void) {
227 static const struct sigaction sa = {
229 .sa_flags = SA_NODEFER, /* So that we can raise the signal again from the signal handler */
233 /* We ignore the return value here, since, we don't mind if we
234 * cannot set up a crash handler */
235 r = sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
237 log_debug_errno(r, "I had trouble setting up the crash handler, ignoring: %m");
240 static int console_setup(void) {
241 _cleanup_close_ int tty_fd = -1;
244 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
246 return log_error_errno(tty_fd, "Failed to open /dev/console: %m");
248 /* We don't want to force text mode. plymouth may be showing
249 * pictures already from initrd. */
250 r = reset_terminal_fd(tty_fd, false);
252 return log_error_errno(r, "Failed to reset /dev/console: %m");
257 static int set_default_unit(const char *u) {
266 free(arg_default_unit);
267 arg_default_unit = c;
272 static int parse_proc_cmdline_item(const char *key, const char *value) {
274 static const char * const rlmap[] = {
275 "emergency", SPECIAL_EMERGENCY_TARGET,
276 "-b", SPECIAL_EMERGENCY_TARGET,
277 "rescue", SPECIAL_RESCUE_TARGET,
278 "single", SPECIAL_RESCUE_TARGET,
279 "-s", SPECIAL_RESCUE_TARGET,
280 "s", SPECIAL_RESCUE_TARGET,
281 "S", SPECIAL_RESCUE_TARGET,
282 "1", SPECIAL_RESCUE_TARGET,
283 "2", SPECIAL_RUNLEVEL2_TARGET,
284 "3", SPECIAL_RUNLEVEL3_TARGET,
285 "4", SPECIAL_RUNLEVEL4_TARGET,
286 "5", SPECIAL_RUNLEVEL5_TARGET,
292 if (streq(key, "systemd.unit") && value) {
295 return set_default_unit(value);
297 } else if (streq(key, "rd.systemd.unit") && value) {
300 return set_default_unit(value);
302 } else if (streq(key, "systemd.dump_core") && value) {
304 r = parse_boolean(value);
306 log_warning("Failed to parse dump core switch %s. Ignoring.", value);
310 } else if (streq(key, "systemd.crash_shell") && value) {
312 r = parse_boolean(value);
314 log_warning("Failed to parse crash shell switch %s. Ignoring.", value);
318 } else if (streq(key, "systemd.crash_chvt") && value) {
320 if (safe_atoi(value, &r) < 0)
321 log_warning("Failed to parse crash chvt switch %s. Ignoring.", value);
325 } else if (streq(key, "systemd.confirm_spawn") && value) {
327 r = parse_boolean(value);
329 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", value);
331 arg_confirm_spawn = r;
333 } else if (streq(key, "systemd.show_status") && value) {
335 r = parse_show_status(value, &arg_show_status);
337 log_warning("Failed to parse show status switch %s. Ignoring.", value);
339 } else if (streq(key, "systemd.default_standard_output") && value) {
341 r = exec_output_from_string(value);
343 log_warning("Failed to parse default standard output switch %s. Ignoring.", value);
345 arg_default_std_output = r;
347 } else if (streq(key, "systemd.default_standard_error") && value) {
349 r = exec_output_from_string(value);
351 log_warning("Failed to parse default standard error switch %s. Ignoring.", value);
353 arg_default_std_error = r;
355 } else if (streq(key, "systemd.setenv") && value) {
357 if (env_assignment_is_valid(value)) {
360 env = strv_env_set(arg_default_environment, value);
362 arg_default_environment = env;
364 log_warning_errno(ENOMEM, "Setting environment variable '%s' failed, ignoring: %m", value);
366 log_warning("Environment variable name '%s' is not valid. Ignoring.", value);
368 } else if (streq(key, "quiet") && !value) {
370 if (arg_show_status == _SHOW_STATUS_UNSET)
371 arg_show_status = SHOW_STATUS_AUTO;
373 } else if (streq(key, "debug") && !value) {
375 /* Note that log_parse_environment() handles 'debug'
376 * too, and sets the log level to LOG_DEBUG. */
378 if (detect_container(NULL) > 0)
379 log_set_target(LOG_TARGET_CONSOLE);
381 } else if (!in_initrd() && !value) {
384 /* SysV compatibility */
385 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
386 if (streq(key, rlmap[i]))
387 return set_default_unit(rlmap[i+1]);
393 #define DEFINE_SETTER(name, func, descr) \
394 static int name(const char *unit, \
395 const char *filename, \
397 const char *section, \
398 unsigned section_line, \
399 const char *lvalue, \
401 const char *rvalue, \
413 log_syntax(unit, LOG_ERR, filename, line, -r, \
414 "Invalid " descr "'%s': %s", \
415 rvalue, strerror(-r)); \
420 DEFINE_SETTER(config_parse_level2, log_set_max_level_from_string, "log level")
421 DEFINE_SETTER(config_parse_target, log_set_target_from_string, "target")
422 DEFINE_SETTER(config_parse_color, log_show_color_from_string, "color" )
423 DEFINE_SETTER(config_parse_location, log_show_location_from_string, "location")
425 static int config_parse_cpu_affinity2(
427 const char *filename,
430 unsigned section_line,
437 const char *word, *state;
446 FOREACH_WORD_QUOTED(word, l, rvalue, state) {
451 if (!(t = strndup(word, l)))
454 r = safe_atou(t, &cpu);
458 if (!(c = cpu_set_malloc(&ncpus)))
461 if (r < 0 || cpu >= ncpus) {
462 log_syntax(unit, LOG_ERR, filename, line, -r,
463 "Failed to parse CPU affinity '%s'", rvalue);
468 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
471 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
472 "Trailing garbage, ignoring.");
475 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
476 log_unit_warning(unit, "Failed to set CPU affinity: %m");
484 static int config_parse_show_status(
486 const char *filename,
489 unsigned section_line,
497 ShowStatus *b = data;
504 k = parse_show_status(rvalue, b);
506 log_syntax(unit, LOG_ERR, filename, line, -k,
507 "Failed to parse show status setting, ignoring: %s", rvalue);
514 static void strv_free_free(char ***l) {
526 static void free_join_controllers(void) {
527 strv_free_free(arg_join_controllers);
528 arg_join_controllers = NULL;
531 static int config_parse_join_controllers(const char *unit,
532 const char *filename,
535 unsigned section_line,
543 const char *word, *state;
550 free_join_controllers();
552 FOREACH_WORD_QUOTED(word, length, rvalue, state) {
555 s = strndup(word, length);
559 l = strv_split(s, ",");
564 if (strv_length(l) <= 1) {
569 if (!arg_join_controllers) {
570 arg_join_controllers = new(char**, 2);
571 if (!arg_join_controllers) {
576 arg_join_controllers[0] = l;
577 arg_join_controllers[1] = NULL;
584 t = new0(char**, n+2);
592 for (a = arg_join_controllers; *a; a++) {
594 if (strv_overlap(*a, l)) {
595 if (strv_extend_strv(&l, *a) < 0) {
615 t[n++] = strv_uniq(l);
617 strv_free_free(arg_join_controllers);
618 arg_join_controllers = t;
622 log_syntax(unit, LOG_ERR, filename, line, EINVAL,
623 "Trailing garbage, ignoring.");
628 static int parse_config_file(void) {
630 const ConfigTableItem items[] = {
631 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
632 { "Manager", "LogTarget", config_parse_target, 0, NULL },
633 { "Manager", "LogColor", config_parse_color, 0, NULL },
634 { "Manager", "LogLocation", config_parse_location, 0, NULL },
635 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
636 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
637 { "Manager", "ShowStatus", config_parse_show_status, 0, &arg_show_status },
638 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
639 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
640 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
641 { "Manager", "RuntimeWatchdogSec", config_parse_sec, 0, &arg_runtime_watchdog },
642 { "Manager", "ShutdownWatchdogSec", config_parse_sec, 0, &arg_shutdown_watchdog },
643 { "Manager", "CapabilityBoundingSet", config_parse_bounding_set, 0, &arg_capability_bounding_set_drop },
645 { "Manager", "SystemCallArchitectures", config_parse_syscall_archs, 0, &arg_syscall_archs },
647 { "Manager", "TimerSlackNSec", config_parse_nsec, 0, &arg_timer_slack_nsec },
648 { "Manager", "DefaultTimerAccuracySec", config_parse_sec, 0, &arg_default_timer_accuracy_usec },
649 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
650 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
651 { "Manager", "DefaultTimeoutStartSec", config_parse_sec, 0, &arg_default_timeout_start_usec },
652 { "Manager", "DefaultTimeoutStopSec", config_parse_sec, 0, &arg_default_timeout_stop_usec },
653 { "Manager", "DefaultRestartSec", config_parse_sec, 0, &arg_default_restart_usec },
654 { "Manager", "DefaultStartLimitInterval", config_parse_sec, 0, &arg_default_start_limit_interval },
655 { "Manager", "DefaultStartLimitBurst", config_parse_unsigned, 0, &arg_default_start_limit_burst },
656 { "Manager", "DefaultEnvironment", config_parse_environ, 0, &arg_default_environment },
657 { "Manager", "DefaultLimitCPU", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CPU] },
658 { "Manager", "DefaultLimitFSIZE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_FSIZE] },
659 { "Manager", "DefaultLimitDATA", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_DATA] },
660 { "Manager", "DefaultLimitSTACK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_STACK] },
661 { "Manager", "DefaultLimitCORE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_CORE] },
662 { "Manager", "DefaultLimitRSS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RSS] },
663 { "Manager", "DefaultLimitNOFILE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NOFILE] },
664 { "Manager", "DefaultLimitAS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_AS] },
665 { "Manager", "DefaultLimitNPROC", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NPROC] },
666 { "Manager", "DefaultLimitMEMLOCK", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MEMLOCK] },
667 { "Manager", "DefaultLimitLOCKS", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_LOCKS] },
668 { "Manager", "DefaultLimitSIGPENDING", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_SIGPENDING] },
669 { "Manager", "DefaultLimitMSGQUEUE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_MSGQUEUE] },
670 { "Manager", "DefaultLimitNICE", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_NICE] },
671 { "Manager", "DefaultLimitRTPRIO", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTPRIO] },
672 { "Manager", "DefaultLimitRTTIME", config_parse_limit, 0, &arg_default_rlimit[RLIMIT_RTTIME] },
673 { "Manager", "DefaultCPUAccounting", config_parse_bool, 0, &arg_default_cpu_accounting },
674 { "Manager", "DefaultBlockIOAccounting", config_parse_bool, 0, &arg_default_blockio_accounting },
675 { "Manager", "DefaultMemoryAccounting", config_parse_bool, 0, &arg_default_memory_accounting },
679 const char *fn, *conf_dirs_nulstr;
681 fn = arg_running_as == SYSTEMD_SYSTEM ? PKGSYSCONFDIR "/system.conf" : PKGSYSCONFDIR "/user.conf";
682 conf_dirs_nulstr = arg_running_as == SYSTEMD_SYSTEM ? CONF_DIRS_NULSTR("systemd/system.conf") : CONF_DIRS_NULSTR("systemd/user.conf");
683 config_parse_many(fn, conf_dirs_nulstr, "Manager\0",
684 config_item_table_lookup, items, false, NULL);
689 static int parse_argv(int argc, char *argv[]) {
692 ARG_LOG_LEVEL = 0x100,
702 ARG_DUMP_CONFIGURATION_ITEMS,
709 ARG_DEFAULT_STD_OUTPUT,
710 ARG_DEFAULT_STD_ERROR
713 static const struct option options[] = {
714 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
715 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
716 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
717 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
718 { "unit", required_argument, NULL, ARG_UNIT },
719 { "system", no_argument, NULL, ARG_SYSTEM },
720 { "user", no_argument, NULL, ARG_USER },
721 { "test", no_argument, NULL, ARG_TEST },
722 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
723 { "help", no_argument, NULL, 'h' },
724 { "version", no_argument, NULL, ARG_VERSION },
725 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
726 { "dump-core", optional_argument, NULL, ARG_DUMP_CORE },
727 { "crash-shell", optional_argument, NULL, ARG_CRASH_SHELL },
728 { "confirm-spawn", optional_argument, NULL, ARG_CONFIRM_SPAWN },
729 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
730 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
731 { "switched-root", no_argument, NULL, ARG_SWITCHED_ROOT },
732 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
733 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
745 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
750 r = log_set_max_level_from_string(optarg);
752 log_error("Failed to parse log level %s.", optarg);
759 r = log_set_target_from_string(optarg);
761 log_error("Failed to parse log target %s.", optarg);
770 r = log_show_color_from_string(optarg);
772 log_error("Failed to parse log color setting %s.", optarg);
776 log_show_color(true);
780 case ARG_LOG_LOCATION:
782 r = log_show_location_from_string(optarg);
784 log_error("Failed to parse log location setting %s.", optarg);
788 log_show_location(true);
792 case ARG_DEFAULT_STD_OUTPUT:
793 r = exec_output_from_string(optarg);
795 log_error("Failed to parse default standard output setting %s.", optarg);
798 arg_default_std_output = r;
801 case ARG_DEFAULT_STD_ERROR:
802 r = exec_output_from_string(optarg);
804 log_error("Failed to parse default standard error output setting %s.", optarg);
807 arg_default_std_error = r;
812 r = set_default_unit(optarg);
814 return log_error_errno(r, "Failed to set default unit %s: %m", optarg);
819 arg_running_as = SYSTEMD_SYSTEM;
823 arg_running_as = SYSTEMD_USER;
827 arg_action = ACTION_TEST;
828 if (arg_no_pager < 0)
837 arg_action = ACTION_VERSION;
840 case ARG_DUMP_CONFIGURATION_ITEMS:
841 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
845 r = optarg ? parse_boolean(optarg) : 1;
847 log_error("Failed to parse dump core boolean %s.", optarg);
853 case ARG_CRASH_SHELL:
854 r = optarg ? parse_boolean(optarg) : 1;
856 log_error("Failed to parse crash shell boolean %s.", optarg);
862 case ARG_CONFIRM_SPAWN:
863 r = optarg ? parse_boolean(optarg) : 1;
865 log_error("Failed to parse confirm spawn boolean %s.", optarg);
868 arg_confirm_spawn = r;
871 case ARG_SHOW_STATUS:
873 r = parse_show_status(optarg, &arg_show_status);
875 log_error("Failed to parse show status boolean %s.", optarg);
879 arg_show_status = SHOW_STATUS_YES;
882 case ARG_DESERIALIZE: {
886 r = safe_atoi(optarg, &fd);
887 if (r < 0 || fd < 0) {
888 log_error("Failed to parse deserialize option %s.", optarg);
889 return r < 0 ? r : -EINVAL;
892 fd_cloexec(fd, true);
896 return log_error_errno(errno, "Failed to open serialization fd: %m");
898 if (arg_serialization)
899 fclose(arg_serialization);
901 arg_serialization = f;
906 case ARG_SWITCHED_ROOT:
907 arg_switched_root = true;
911 arg_action = ACTION_HELP;
912 if (arg_no_pager < 0)
917 log_set_max_level(LOG_DEBUG);
923 /* Just to eat away the sysvinit kernel
924 * cmdline args without getopt() error
925 * messages that we'll parse in
926 * parse_proc_cmdline_word() or ignore. */
935 assert_not_reached("Unhandled option code.");
938 if (optind < argc && getpid() != 1) {
939 /* Hmm, when we aren't run as init system
940 * let's complain about excess arguments */
942 log_error("Excess arguments.");
949 static int help(void) {
951 printf("%s [OPTIONS...]\n\n"
952 "Starts up and maintains the system or user services.\n\n"
953 " -h --help Show this help\n"
954 " --test Determine startup sequence, dump it and exit\n"
955 " --no-pager Do not pipe output into a pager\n"
956 " --dump-configuration-items Dump understood unit configuration items\n"
957 " --unit=UNIT Set default unit\n"
958 " --system Run a system instance, even if PID != 1\n"
959 " --user Run a user instance\n"
960 " --dump-core[=0|1] Dump core on crash\n"
961 " --crash-shell[=0|1] Run shell on crash\n"
962 " --confirm-spawn[=0|1] Ask for confirmation when spawning processes\n"
963 " --show-status[=0|1] Show status updates on the console during bootup\n"
964 " --log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)\n"
965 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
966 " --log-color[=0|1] Highlight important log messages\n"
967 " --log-location[=0|1] Include code location in log messages\n"
968 " --default-standard-output= Set default standard output for services\n"
969 " --default-standard-error= Set default standard error output for services\n",
970 program_invocation_short_name);
975 static int version(void) {
976 puts(PACKAGE_STRING);
977 puts(SYSTEMD_FEATURES);
982 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds, bool switching_root) {
991 r = manager_open_serialization(m, &f);
993 log_error_errno(r, "Failed to create serialization file: %m");
997 /* Make sure nothing is really destructed when we shut down */
999 bus_manager_send_reloading(m, true);
1004 log_error_errno(r, "Failed to allocate fd set: %m");
1008 r = manager_serialize(m, f, fds, switching_root);
1010 log_error_errno(r, "Failed to serialize state: %m");
1014 if (fseeko(f, 0, SEEK_SET) < 0) {
1015 log_error_errno(errno, "Failed to rewind serialization fd: %m");
1019 r = fd_cloexec(fileno(f), false);
1021 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization: %m");
1025 r = fdset_cloexec(fds, false);
1027 log_error_errno(r, "Failed to disable O_CLOEXEC for serialization fds: %m");
1045 static int bump_rlimit_nofile(struct rlimit *saved_rlimit) {
1049 assert(saved_rlimit);
1051 /* Save the original RLIMIT_NOFILE so that we can reset it
1052 * later when transitioning from the initrd to the main
1053 * systemd or suchlike. */
1054 if (getrlimit(RLIMIT_NOFILE, saved_rlimit) < 0)
1055 return log_error_errno(errno, "Reading RLIMIT_NOFILE failed: %m");
1057 /* Make sure forked processes get the default kernel setting */
1058 if (!arg_default_rlimit[RLIMIT_NOFILE]) {
1061 rl = newdup(struct rlimit, saved_rlimit, 1);
1065 arg_default_rlimit[RLIMIT_NOFILE] = rl;
1068 /* Bump up the resource limit for ourselves substantially */
1069 nl.rlim_cur = nl.rlim_max = 64*1024;
1070 r = setrlimit_closest(RLIMIT_NOFILE, &nl);
1072 return log_error_errno(r, "Setting RLIMIT_NOFILE failed: %m");
1077 static void test_mtab(void) {
1079 static const char ok[] =
1080 "/proc/self/mounts\0"
1082 "../proc/self/mounts\0"
1085 _cleanup_free_ char *p = NULL;
1088 /* Check that /etc/mtab is a symlink to the right place or
1089 * non-existing. But certainly not a file, or a symlink to
1090 * some weird place... */
1092 r = readlink_malloc("/etc/mtab", &p);
1095 if (r >= 0 && nulstr_contains(ok, p))
1098 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1099 "This is not supported anymore. "
1100 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1103 static void test_usr(void) {
1105 /* Check that /usr is not a separate fs */
1107 if (dir_is_empty("/usr") <= 0)
1110 log_warning("/usr appears to be on its own filesystem and is not already mounted. This is not a supported setup. "
1111 "Some things will probably break (sometimes even silently) in mysterious ways. "
1112 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1115 static int initialize_join_controllers(void) {
1116 /* By default, mount "cpu" + "cpuacct" together, and "net_cls"
1117 * + "net_prio". We'd like to add "cpuset" to the mix, but
1118 * "cpuset" doesn't really work for groups with no initialized
1121 arg_join_controllers = new(char**, 3);
1122 if (!arg_join_controllers)
1125 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1126 arg_join_controllers[1] = strv_new("net_cls", "net_prio", NULL);
1127 arg_join_controllers[2] = NULL;
1129 if (!arg_join_controllers[0] || !arg_join_controllers[1]) {
1130 free_join_controllers();
1137 static int enforce_syscall_archs(Set *archs) {
1139 scmp_filter_ctx *seccomp;
1144 seccomp = seccomp_init(SCMP_ACT_ALLOW);
1148 SET_FOREACH(id, arg_syscall_archs, i) {
1149 r = seccomp_arch_add(seccomp, PTR_TO_UINT32(id) - 1);
1153 log_error_errno(r, "Failed to add architecture to seccomp: %m");
1158 r = seccomp_attr_set(seccomp, SCMP_FLTATR_CTL_NNP, 0);
1160 log_error_errno(r, "Failed to unset NO_NEW_PRIVS: %m");
1164 r = seccomp_load(seccomp);
1166 log_error_errno(r, "Failed to add install architecture seccomp: %m");
1169 seccomp_release(seccomp);
1176 static int status_welcome(void) {
1177 _cleanup_free_ char *pretty_name = NULL, *ansi_color = NULL;
1180 r = parse_env_file("/etc/os-release", NEWLINE,
1181 "PRETTY_NAME", &pretty_name,
1182 "ANSI_COLOR", &ansi_color,
1185 r = parse_env_file("/usr/lib/os-release", NEWLINE,
1186 "PRETTY_NAME", &pretty_name,
1187 "ANSI_COLOR", &ansi_color,
1191 if (r < 0 && r != -ENOENT)
1192 log_warning_errno(r, "Failed to read os-release file: %m");
1194 return status_printf(NULL, false, false,
1195 "\nWelcome to \x1B[%sm%s\x1B[0m!\n",
1196 isempty(ansi_color) ? "1" : ansi_color,
1197 isempty(pretty_name) ? "Linux" : pretty_name);
1200 static int write_container_id(void) {
1203 c = getenv("container");
1207 return write_string_file("/run/systemd/container", c);
1210 int main(int argc, char *argv[]) {
1212 int r, retval = EXIT_FAILURE;
1213 usec_t before_startup, after_startup;
1214 char timespan[FORMAT_TIMESPAN_MAX];
1216 bool reexecute = false;
1217 const char *shutdown_verb = NULL;
1218 dual_timestamp initrd_timestamp = DUAL_TIMESTAMP_NULL;
1219 dual_timestamp userspace_timestamp = DUAL_TIMESTAMP_NULL;
1220 dual_timestamp kernel_timestamp = DUAL_TIMESTAMP_NULL;
1221 dual_timestamp security_start_timestamp = DUAL_TIMESTAMP_NULL;
1222 dual_timestamp security_finish_timestamp = DUAL_TIMESTAMP_NULL;
1223 static char systemd[] = "systemd";
1224 bool skip_setup = false;
1226 bool loaded_policy = false;
1227 bool arm_reboot_watchdog = false;
1228 bool queue_default_job = false;
1229 bool empty_etc = false;
1230 char *switch_root_dir = NULL, *switch_root_init = NULL;
1231 struct rlimit saved_rlimit_nofile = RLIMIT_MAKE_CONST(0);
1232 const char *error_message = NULL;
1234 #ifdef HAVE_SYSV_COMPAT
1235 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1236 /* This is compatibility support for SysV, where
1237 * calling init as a user is identical to telinit. */
1240 execv(SYSTEMCTL_BINARY_PATH, argv);
1241 log_error_errno(errno, "Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1246 dual_timestamp_from_monotonic(&kernel_timestamp, 0);
1247 dual_timestamp_get(&userspace_timestamp);
1249 /* Determine if this is a reexecution or normal bootup. We do
1250 * the full command line parsing much later, so let's just
1251 * have a quick peek here. */
1252 if (strv_find(argv+1, "--deserialize"))
1255 /* If we have switched root, do all the special setup
1257 if (strv_find(argv+1, "--switched-root"))
1260 /* If we get started via the /sbin/init symlink then we are
1261 called 'init'. After a subsequent reexecution we are then
1262 called 'systemd'. That is confusing, hence let's call us
1263 systemd right-away. */
1264 program_invocation_short_name = systemd;
1265 prctl(PR_SET_NAME, systemd);
1270 log_show_color(isatty(STDERR_FILENO) > 0);
1271 log_set_upgrade_syslog_to_journal(true);
1273 /* Disable the umask logic */
1277 if (getpid() == 1 && detect_container(NULL) <= 0) {
1279 /* Running outside of a container as PID 1 */
1280 arg_running_as = SYSTEMD_SYSTEM;
1282 log_set_target(LOG_TARGET_KMSG);
1286 initrd_timestamp = userspace_timestamp;
1289 mount_setup_early();
1290 dual_timestamp_get(&security_start_timestamp);
1291 if (mac_selinux_setup(&loaded_policy) < 0) {
1292 error_message = "Failed to load SELinux policy";
1294 } else if (ima_setup() < 0) {
1295 error_message = "Failed to load IMA policy";
1297 } else if (mac_smack_setup(&loaded_policy) < 0) {
1298 error_message = "Failed to load SMACK policy";
1301 dual_timestamp_get(&security_finish_timestamp);
1304 if (mac_selinux_init(NULL) < 0) {
1305 error_message = "Failed to initialize SELinux policy";
1310 if (clock_is_localtime() > 0) {
1314 * The very first call of settimeofday() also does a time warp in the kernel.
1316 * In the rtc-in-local time mode, we set the kernel's timezone, and rely on
1317 * external tools to take care of maintaining the RTC and do all adjustments.
1318 * This matches the behavior of Windows, which leaves the RTC alone if the
1319 * registry tells that the RTC runs in UTC.
1321 r = clock_set_timezone(&min);
1323 log_error_errno(r, "Failed to apply local time delta, ignoring: %m");
1325 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1326 } else if (!in_initrd()) {
1328 * Do a dummy very first call to seal the kernel's time warp magic.
1330 * Do not call this this from inside the initrd. The initrd might not
1331 * carry /etc/adjtime with LOCAL, but the real system could be set up
1332 * that way. In such case, we need to delay the time-warp or the sealing
1333 * until we reach the real system.
1335 * Do no set the kernel's timezone. The concept of local time cannot
1336 * be supported reliably, the time will jump or be incorrect at every daylight
1337 * saving time change. All kernel local time concepts will be treated
1340 clock_reset_timewarp();
1344 /* Set the default for later on, but don't actually
1345 * open the logs like this for now. Note that if we
1346 * are transitioning from the initrd there might still
1347 * be journal fd open, and we shouldn't attempt
1348 * opening that before we parsed /proc/cmdline which
1349 * might redirect output elsewhere. */
1350 log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
1352 } else if (getpid() == 1) {
1353 /* Running inside a container, as PID 1 */
1354 arg_running_as = SYSTEMD_SYSTEM;
1355 log_set_target(LOG_TARGET_CONSOLE);
1356 log_close_console(); /* force reopen of /dev/console */
1359 /* For the later on, see above... */
1360 log_set_target(LOG_TARGET_JOURNAL);
1362 /* clear the kernel timestamp,
1363 * because we are in a container */
1364 kernel_timestamp.monotonic = 0ULL;
1365 kernel_timestamp.realtime = 0ULL;
1368 /* Running as user instance */
1369 arg_running_as = SYSTEMD_USER;
1370 log_set_target(LOG_TARGET_AUTO);
1373 /* clear the kernel timestamp,
1374 * because we are not PID 1 */
1375 kernel_timestamp.monotonic = 0ULL;
1376 kernel_timestamp.realtime = 0ULL;
1379 /* Initialize default unit */
1380 r = set_default_unit(SPECIAL_DEFAULT_TARGET);
1382 log_emergency_errno(r, "Failed to set default unit %s: %m", SPECIAL_DEFAULT_TARGET);
1383 error_message = "Failed to set default unit";
1387 r = initialize_join_controllers();
1389 error_message = "Failed to initalize cgroup controllers";
1393 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1394 * /proc/$PID/fd is available. */
1395 if (getpid() == 1) {
1397 /* Load the kernel modules early, so that we kdbus.ko is loaded before kdbusfs shall be mounted */
1401 r = mount_setup(loaded_policy);
1403 error_message = "Failed to mount API filesystems";
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) {
1414 error_message = "Failed to parse config file";
1418 if (arg_running_as == SYSTEMD_SYSTEM) {
1419 r = parse_proc_cmdline(parse_proc_cmdline_item);
1421 log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
1424 /* Note that this also parses bits from the kernel command
1425 * line, including "debug". */
1426 log_parse_environment();
1428 if (parse_argv(argc, argv) < 0) {
1429 error_message = "Failed to parse commandline arguments";
1433 if (arg_action == ACTION_TEST &&
1435 log_error("Don't run test mode as root.");
1439 if (arg_running_as == SYSTEMD_USER &&
1440 arg_action == ACTION_RUN &&
1442 log_error("Trying to run as user instance, but the system has not been booted with systemd.");
1446 if (arg_running_as == SYSTEMD_SYSTEM &&
1447 arg_action == ACTION_RUN &&
1448 running_in_chroot() > 0) {
1449 log_error("Cannot be run in a chroot() environment.");
1453 if (arg_action == ACTION_TEST)
1456 pager_open_if_enabled();
1458 if (arg_action == ACTION_HELP) {
1461 } else if (arg_action == ACTION_VERSION) {
1464 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1465 unit_dump_config_items(stdout);
1466 retval = EXIT_SUCCESS;
1468 } else if (arg_action == ACTION_DONE) {
1469 retval = EXIT_SUCCESS;
1473 if (arg_running_as == SYSTEMD_USER &&
1474 !getenv("XDG_RUNTIME_DIR")) {
1475 log_error("Trying to run as user instance, but $XDG_RUNTIME_DIR is not set.");
1479 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1481 /* Close logging fds, in order not to confuse fdset below */
1484 /* Remember open file descriptors for later deserialization */
1485 r = fdset_new_fill(&fds);
1487 log_emergency_errno(r, "Failed to allocate fd set: %m");
1488 error_message = "Failed to allocate fd set";
1491 fdset_cloexec(fds, true);
1493 if (arg_serialization)
1494 assert_se(fdset_remove(fds, fileno(arg_serialization)) >= 0);
1496 if (arg_running_as == SYSTEMD_SYSTEM)
1497 /* Become a session leader if we aren't one yet. */
1500 /* Move out of the way, so that we won't block unmounts */
1501 assert_se(chdir("/") == 0);
1503 /* Reset the console, but only if this is really init and we
1504 * are freshly booted */
1505 if (arg_running_as == SYSTEMD_SYSTEM && arg_action == ACTION_RUN) {
1507 /* If we are init, we connect stdin/stdout/stderr to
1508 * /dev/null and make sure we don't have a controlling
1512 if (getpid() == 1 && !skip_setup)
1516 /* Open the logging devices, if possible and necessary */
1519 if (arg_show_status == _SHOW_STATUS_UNSET)
1520 arg_show_status = SHOW_STATUS_YES;
1522 /* Make sure we leave a core dump without panicing the
1524 if (getpid() == 1) {
1525 install_crash_handler();
1527 r = mount_cgroup_controllers(arg_join_controllers);
1532 if (arg_running_as == SYSTEMD_SYSTEM) {
1533 const char *virtualization = NULL;
1535 log_info(PACKAGE_STRING " running in %ssystem mode. (" SYSTEMD_FEATURES ")",
1536 arg_action == ACTION_TEST ? "test " : "" );
1538 detect_virtualization(&virtualization);
1540 log_info("Detected virtualization '%s'.", virtualization);
1542 write_container_id();
1544 log_info("Detected architecture '%s'.", architecture_to_string(uname_architecture()));
1547 log_info("Running in initial RAM disk.");
1549 /* Let's check whether /etc is already populated. We
1550 * don't actually really check for that, but use
1551 * /etc/machine-id as flag file. This allows container
1552 * managers and installers to provision a couple of
1553 * files already. If the container manager wants to
1554 * provision the machine ID itself it should pass
1555 * $container_uuid to PID 1. */
1557 empty_etc = access("/etc/machine-id", F_OK) < 0;
1559 log_info("Running with unpopulated /etc.");
1561 _cleanup_free_ char *t;
1563 t = uid_to_name(getuid());
1564 log_debug(PACKAGE_STRING " running in %suser mode for user "UID_FMT"/%s. (" SYSTEMD_FEATURES ")",
1565 arg_action == ACTION_TEST ? " test" : "", getuid(), t);
1568 if (arg_running_as == SYSTEMD_SYSTEM && !skip_setup) {
1569 if (arg_show_status > 0 || plymouth_running())
1573 machine_id_setup(NULL);
1580 if (arg_running_as == SYSTEMD_SYSTEM && arg_runtime_watchdog > 0)
1581 watchdog_set_timeout(&arg_runtime_watchdog);
1583 if (arg_timer_slack_nsec != NSEC_INFINITY)
1584 if (prctl(PR_SET_TIMERSLACK, arg_timer_slack_nsec) < 0)
1585 log_error_errno(errno, "Failed to adjust timer slack: %m");
1587 if (arg_capability_bounding_set_drop) {
1588 r = capability_bounding_set_drop_usermode(arg_capability_bounding_set_drop);
1590 log_emergency_errno(r, "Failed to drop capability bounding set of usermode helpers: %m");
1591 error_message = "Failed to drop capability bounding set of usermode helpers";
1594 r = capability_bounding_set_drop(arg_capability_bounding_set_drop, true);
1596 log_emergency_errno(r, "Failed to drop capability bounding set: %m");
1597 error_message = "Failed to drop capability bounding set";
1602 if (arg_syscall_archs) {
1603 r = enforce_syscall_archs(arg_syscall_archs);
1605 error_message = "Failed to set syscall architectures";
1610 if (arg_running_as == SYSTEMD_USER) {
1611 /* Become reaper of our children */
1612 if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
1613 log_warning_errno(errno, "Failed to make us a subreaper: %m");
1614 if (errno == EINVAL)
1615 log_info("Perhaps the kernel version is too old (< 3.4?)");
1619 if (arg_running_as == SYSTEMD_SYSTEM) {
1620 bump_rlimit_nofile(&saved_rlimit_nofile);
1623 r = unit_file_preset_all(UNIT_FILE_SYSTEM, false, NULL, UNIT_FILE_PRESET_FULL, false, NULL, 0);
1625 log_warning_errno(r, "Failed to populate /etc with preset unit settings, ignoring: %m");
1627 log_info("Populated /etc with preset unit settings.");
1631 r = manager_new(arg_running_as, arg_action == ACTION_TEST, &m);
1633 log_emergency_errno(r, "Failed to allocate manager object: %m");
1634 error_message = "Failed to allocate manager object";
1638 m->confirm_spawn = arg_confirm_spawn;
1639 m->default_timer_accuracy_usec = arg_default_timer_accuracy_usec;
1640 m->default_std_output = arg_default_std_output;
1641 m->default_std_error = arg_default_std_error;
1642 m->default_restart_usec = arg_default_restart_usec;
1643 m->default_timeout_start_usec = arg_default_timeout_start_usec;
1644 m->default_timeout_stop_usec = arg_default_timeout_stop_usec;
1645 m->default_start_limit_interval = arg_default_start_limit_interval;
1646 m->default_start_limit_burst = arg_default_start_limit_burst;
1647 m->default_cpu_accounting = arg_default_cpu_accounting;
1648 m->default_blockio_accounting = arg_default_blockio_accounting;
1649 m->default_memory_accounting = arg_default_memory_accounting;
1650 m->runtime_watchdog = arg_runtime_watchdog;
1651 m->shutdown_watchdog = arg_shutdown_watchdog;
1653 m->userspace_timestamp = userspace_timestamp;
1654 m->kernel_timestamp = kernel_timestamp;
1655 m->initrd_timestamp = initrd_timestamp;
1656 m->security_start_timestamp = security_start_timestamp;
1657 m->security_finish_timestamp = security_finish_timestamp;
1659 manager_set_default_rlimits(m, arg_default_rlimit);
1660 manager_environment_add(m, NULL, arg_default_environment);
1661 manager_set_show_status(m, arg_show_status);
1662 manager_set_first_boot(m, empty_etc);
1664 /* Remember whether we should queue the default job */
1665 queue_default_job = !arg_serialization || arg_switched_root;
1667 before_startup = now(CLOCK_MONOTONIC);
1669 r = manager_startup(m, arg_serialization, fds);
1671 log_error_errno(r, "Failed to fully start up daemon: %m");
1673 /* This will close all file descriptors that were opened, but
1674 * not claimed by any unit. */
1678 if (arg_serialization) {
1679 fclose(arg_serialization);
1680 arg_serialization = NULL;
1683 if (queue_default_job) {
1684 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1685 Unit *target = NULL;
1686 Job *default_unit_job;
1688 log_debug("Activating default unit: %s", arg_default_unit);
1690 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1692 log_error("Failed to load default target: %s", bus_error_message(&error, r));
1693 else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND)
1694 log_error_errno(target->load_error, "Failed to load default target: %m");
1695 else if (target->load_state == UNIT_MASKED)
1696 log_error("Default target masked.");
1698 if (!target || target->load_state != UNIT_LOADED) {
1699 log_info("Trying to load rescue target...");
1701 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1703 log_emergency("Failed to load rescue target: %s", bus_error_message(&error, r));
1704 error_message = "Failed to load rescue target";
1706 } else if (target->load_state == UNIT_ERROR || target->load_state == UNIT_NOT_FOUND) {
1707 log_emergency_errno(target->load_error, "Failed to load rescue target: %m");
1708 error_message = "Failed to load rescue target";
1710 } else if (target->load_state == UNIT_MASKED) {
1711 log_emergency("Rescue target masked.");
1712 error_message = "Rescue target masked";
1717 assert(target->load_state == UNIT_LOADED);
1719 if (arg_action == ACTION_TEST) {
1720 printf("-> By units:\n");
1721 manager_dump_units(m, stdout, "\t");
1724 r = manager_add_job(m, JOB_START, target, JOB_ISOLATE, false, &error, &default_unit_job);
1726 log_debug("Default target could not be isolated, starting instead: %s", bus_error_message(&error, r));
1728 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1730 log_emergency("Failed to start default target: %s", bus_error_message(&error, r));
1731 error_message = "Failed to start default target";
1735 log_emergency("Failed to isolate default target: %s", bus_error_message(&error, r));
1736 error_message = "Failed to isolate default target";
1740 m->default_unit_job_id = default_unit_job->id;
1742 after_startup = now(CLOCK_MONOTONIC);
1743 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1744 "Loaded units and determined initial transaction in %s.",
1745 format_timespan(timespan, sizeof(timespan), after_startup - before_startup, 100 * USEC_PER_MSEC));
1747 if (arg_action == ACTION_TEST) {
1748 printf("-> By jobs:\n");
1749 manager_dump_jobs(m, stdout, "\t");
1750 retval = EXIT_SUCCESS;
1756 r = manager_loop(m);
1758 log_emergency_errno(r, "Failed to run main loop: %m");
1759 error_message = "Failed to run main loop";
1763 switch (m->exit_code) {
1766 retval = EXIT_SUCCESS;
1770 case MANAGER_RELOAD:
1771 log_info("Reloading.");
1772 r = manager_reload(m);
1774 log_error_errno(r, "Failed to reload: %m");
1777 case MANAGER_REEXECUTE:
1779 if (prepare_reexecute(m, &arg_serialization, &fds, false) < 0) {
1780 error_message = "Failed to prepare for reexection";
1785 log_notice("Reexecuting.");
1788 case MANAGER_SWITCH_ROOT:
1789 /* Steal the switch root parameters */
1790 switch_root_dir = m->switch_root;
1791 switch_root_init = m->switch_root_init;
1792 m->switch_root = m->switch_root_init = NULL;
1794 if (!switch_root_init)
1795 if (prepare_reexecute(m, &arg_serialization, &fds, true) < 0) {
1796 error_message = "Failed to prepare for reexection";
1801 log_notice("Switching root.");
1804 case MANAGER_REBOOT:
1805 case MANAGER_POWEROFF:
1807 case MANAGER_KEXEC: {
1808 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1809 [MANAGER_REBOOT] = "reboot",
1810 [MANAGER_POWEROFF] = "poweroff",
1811 [MANAGER_HALT] = "halt",
1812 [MANAGER_KEXEC] = "kexec"
1815 assert_se(shutdown_verb = table[m->exit_code]);
1816 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1818 log_notice("Shutting down.");
1823 assert_not_reached("Unknown exit code.");
1831 arg_shutdown_watchdog = m->shutdown_watchdog;
1832 m = manager_free(m);
1834 for (j = 0; j < ELEMENTSOF(arg_default_rlimit); j++) {
1835 free(arg_default_rlimit[j]);
1836 arg_default_rlimit[j] = NULL;
1839 free(arg_default_unit);
1840 arg_default_unit = NULL;
1842 free_join_controllers();
1844 strv_free(arg_default_environment);
1845 arg_default_environment = NULL;
1847 set_free(arg_syscall_archs);
1848 arg_syscall_archs = NULL;
1850 mac_selinux_finish();
1854 unsigned i, args_size;
1856 /* Close and disarm the watchdog, so that the new
1857 * instance can reinitialize it, but doesn't get
1858 * rebooted while we do that */
1859 watchdog_close(true);
1861 /* Reset the RLIMIT_NOFILE to the kernel default, so
1862 * that the new systemd can pass the kernel default to
1863 * its child processes */
1864 if (saved_rlimit_nofile.rlim_cur > 0)
1865 setrlimit(RLIMIT_NOFILE, &saved_rlimit_nofile);
1867 if (switch_root_dir) {
1868 /* Kill all remaining processes from the
1869 * initrd, but don't wait for them, so that we
1870 * can handle the SIGCHLD for them after
1872 broadcast_signal(SIGTERM, false, true);
1874 /* And switch root with MS_MOVE, because we remove the old directory afterwards and detach it. */
1875 r = switch_root(switch_root_dir, "/mnt", true, MS_MOVE);
1877 log_error_errno(r, "Failed to switch root, trying to continue: %m");
1880 args_size = MAX(6, argc+1);
1881 args = newa(const char*, args_size);
1883 if (!switch_root_init) {
1884 char sfd[DECIMAL_STR_MAX(int) + 1];
1886 /* First try to spawn ourselves with the right
1887 * path, and with full serialization. We do
1888 * this only if the user didn't specify an
1889 * explicit init to spawn. */
1891 assert(arg_serialization);
1894 xsprintf(sfd, "%i", fileno(arg_serialization));
1897 args[i++] = SYSTEMD_BINARY_PATH;
1898 if (switch_root_dir)
1899 args[i++] = "--switched-root";
1900 args[i++] = arg_running_as == SYSTEMD_SYSTEM ? "--system" : "--user";
1901 args[i++] = "--deserialize";
1905 /* do not pass along the environment we inherit from the kernel or initrd */
1906 if (switch_root_dir)
1909 assert(i <= args_size);
1910 execv(args[0], (char* const*) args);
1913 /* Try the fallback, if there is any, without any
1914 * serialization. We pass the original argv[] and
1915 * envp[]. (Well, modulo the ordering changes due to
1916 * getopt() in argv[], and some cleanups in envp[],
1917 * but let's hope that doesn't matter.) */
1919 if (arg_serialization) {
1920 fclose(arg_serialization);
1921 arg_serialization = NULL;
1929 /* Reopen the console */
1930 make_console_stdio();
1932 for (j = 1, i = 1; j < (unsigned) argc; j++)
1933 args[i++] = argv[j];
1935 assert(i <= args_size);
1937 /* Reenable any blocked signals, especially important
1938 * if we switch from initial ramdisk to init=... */
1939 reset_all_signal_handlers();
1940 reset_signal_mask();
1942 if (switch_root_init) {
1943 args[0] = switch_root_init;
1944 execv(args[0], (char* const*) args);
1945 log_warning_errno(errno, "Failed to execute configured init, trying fallback: %m");
1948 args[0] = "/sbin/init";
1949 execv(args[0], (char* const*) args);
1951 if (errno == ENOENT) {
1952 log_warning("No /sbin/init, trying fallback");
1954 args[0] = "/bin/sh";
1956 execv(args[0], (char* const*) args);
1957 log_error_errno(errno, "Failed to execute /bin/sh, giving up: %m");
1959 log_warning_errno(errno, "Failed to execute /sbin/init, giving up: %m");
1962 if (arg_serialization) {
1963 fclose(arg_serialization);
1964 arg_serialization = NULL;
1972 #ifdef HAVE_VALGRIND_VALGRIND_H
1973 /* If we are PID 1 and running under valgrind, then let's exit
1974 * here explicitly. valgrind will only generate nice output on
1975 * exit(), not on exec(), hence let's do the former not the
1977 if (getpid() == 1 && RUNNING_ON_VALGRIND)
1981 if (shutdown_verb) {
1982 char log_level[DECIMAL_STR_MAX(int) + 1];
1983 const char* command_line[9] = {
1984 SYSTEMD_SHUTDOWN_BINARY_PATH,
1986 "--log-level", log_level,
1990 _cleanup_strv_free_ char **env_block = NULL;
1992 assert(command_line[pos] == NULL);
1993 env_block = strv_copy(environ);
1995 xsprintf(log_level, "%d", log_get_max_level());
1997 switch (log_get_target()) {
1998 case LOG_TARGET_KMSG:
1999 case LOG_TARGET_JOURNAL_OR_KMSG:
2000 case LOG_TARGET_SYSLOG_OR_KMSG:
2001 command_line[pos++] = "kmsg";
2004 case LOG_TARGET_CONSOLE:
2006 command_line[pos++] = "console";
2010 if (log_get_show_color())
2011 command_line[pos++] = "--log-color";
2013 if (log_get_show_location())
2014 command_line[pos++] = "--log-location";
2016 assert(pos < ELEMENTSOF(command_line));
2018 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
2021 /* If we reboot let's set the shutdown
2022 * watchdog and tell the shutdown binary to
2023 * repeatedly ping it */
2024 r = watchdog_set_timeout(&arg_shutdown_watchdog);
2025 watchdog_close(r < 0);
2027 /* Tell the binary how often to ping, ignore failure */
2028 if (asprintf(&e, "WATCHDOG_USEC="USEC_FMT, arg_shutdown_watchdog) > 0)
2029 strv_push(&env_block, e);
2031 watchdog_close(true);
2033 /* Avoid the creation of new processes forked by the
2034 * kernel; at this point, we will not listen to the
2036 if (detect_container(NULL) <= 0)
2037 cg_uninstall_release_agent(SYSTEMD_CGROUP_CONTROLLER);
2039 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
2040 log_error_errno(errno, "Failed to execute shutdown binary, %s: %m",
2041 getpid() == 1 ? "freezing" : "quitting");
2044 if (getpid() == 1) {
2046 manager_status_printf(NULL, STATUS_TYPE_EMERGENCY,
2047 ANSI_HIGHLIGHT_RED_ON "!!!!!!" ANSI_HIGHLIGHT_OFF,
2048 "%s, freezing.", error_message);