1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
22 #include <dbus/dbus.h>
28 #include <sys/types.h>
34 #include <sys/prctl.h>
38 #include "load-fragment.h"
41 #include "conf-parser.h"
42 #include "bus-errors.h"
51 #include "mount-setup.h"
52 #include "loopback-setup.h"
53 #include "kmod-setup.h"
54 #include "hostname-setup.h"
55 #include "machine-id-setup.h"
56 #include "locale-setup.h"
57 #include "selinux-setup.h"
58 #include "ima-setup.h"
64 ACTION_DUMP_CONFIGURATION_ITEMS,
66 } arg_action = ACTION_RUN;
68 static char *arg_default_unit = NULL;
69 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
71 static bool arg_dump_core = true;
72 static bool arg_crash_shell = false;
73 static int arg_crash_chvt = -1;
74 static bool arg_confirm_spawn = false;
75 static bool arg_show_status = true;
76 #ifdef HAVE_SYSV_COMPAT
77 static bool arg_sysv_console = true;
79 static bool arg_mount_auto = true;
80 static bool arg_swap_auto = true;
81 static char **arg_default_controllers = NULL;
82 static char ***arg_join_controllers = NULL;
83 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
84 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
85 static usec_t arg_runtime_watchdog = 0;
86 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
88 static FILE* serialization = NULL;
90 static void nop_handler(int sig) {
93 _noreturn_ static void crash(int sig) {
96 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
101 /* We want to wait for the core process, hence let's enable SIGCHLD */
103 sa.sa_handler = nop_handler;
104 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
105 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
107 if ((pid = fork()) < 0)
108 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
113 /* Enable default signal handler for core dump */
115 sa.sa_handler = SIG_DFL;
116 assert_se(sigaction(sig, &sa, NULL) == 0);
118 /* Don't limit the core dump size */
120 rl.rlim_cur = RLIM_INFINITY;
121 rl.rlim_max = RLIM_INFINITY;
122 setrlimit(RLIMIT_CORE, &rl);
124 /* Just to be sure... */
125 assert_se(chdir("/") == 0);
127 /* Raise the signal again */
130 assert_not_reached("We shouldn't be here...");
137 /* Order things nicely. */
138 if ((r = wait_for_terminate(pid, &status)) < 0)
139 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
140 else if (status.si_code != CLD_DUMPED)
141 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
143 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
148 chvt(arg_crash_chvt);
150 if (arg_crash_shell) {
154 log_info("Executing crash shell in 10s...");
157 /* Let the kernel reap children for us */
159 sa.sa_handler = SIG_IGN;
160 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
161 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
163 if ((pid = fork()) < 0)
164 log_error("Failed to fork off crash shell: %s", strerror(errno));
168 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
169 log_error("Failed to acquire terminal: %s", strerror(-fd));
170 else if ((r = make_stdio(fd)) < 0)
171 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
173 execl("/bin/sh", "/bin/sh", NULL);
175 log_error("execl() failed: %s", strerror(errno));
179 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
182 log_info("Freezing execution.");
186 static void install_crash_handler(void) {
191 sa.sa_handler = crash;
192 sa.sa_flags = SA_NODEFER;
194 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
197 static int console_setup(bool do_reset) {
200 /* If we are init, we connect stdin/stdout/stderr to /dev/null
201 * and make sure we don't have a controlling tty. */
208 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
210 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
214 /* We don't want to force text mode.
215 * plymouth may be showing pictures already from initrd. */
216 r = reset_terminal_fd(tty_fd, false);
218 log_error("Failed to reset /dev/console: %s", strerror(-r));
220 close_nointr_nofail(tty_fd);
224 static int set_default_unit(const char *u) {
229 if (!(c = strdup(u)))
232 free(arg_default_unit);
233 arg_default_unit = c;
237 static int parse_proc_cmdline_word(const char *word) {
239 static const char * const rlmap[] = {
240 "emergency", SPECIAL_EMERGENCY_TARGET,
241 "-b", SPECIAL_EMERGENCY_TARGET,
242 "single", SPECIAL_RESCUE_TARGET,
243 "-s", SPECIAL_RESCUE_TARGET,
244 "s", SPECIAL_RESCUE_TARGET,
245 "S", SPECIAL_RESCUE_TARGET,
246 "1", SPECIAL_RESCUE_TARGET,
247 "2", SPECIAL_RUNLEVEL2_TARGET,
248 "3", SPECIAL_RUNLEVEL3_TARGET,
249 "4", SPECIAL_RUNLEVEL4_TARGET,
250 "5", SPECIAL_RUNLEVEL5_TARGET,
255 if (startswith(word, "systemd.unit="))
256 return set_default_unit(word + 13);
258 else if (startswith(word, "systemd.log_target=")) {
260 if (log_set_target_from_string(word + 19) < 0)
261 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
263 } else if (startswith(word, "systemd.log_level=")) {
265 if (log_set_max_level_from_string(word + 18) < 0)
266 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
268 } else if (startswith(word, "systemd.log_color=")) {
270 if (log_show_color_from_string(word + 18) < 0)
271 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
273 } else if (startswith(word, "systemd.log_location=")) {
275 if (log_show_location_from_string(word + 21) < 0)
276 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
278 } else if (startswith(word, "systemd.dump_core=")) {
281 if ((r = parse_boolean(word + 18)) < 0)
282 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
286 } else if (startswith(word, "systemd.crash_shell=")) {
289 if ((r = parse_boolean(word + 20)) < 0)
290 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
294 } else if (startswith(word, "systemd.confirm_spawn=")) {
297 if ((r = parse_boolean(word + 22)) < 0)
298 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
300 arg_confirm_spawn = r;
302 } else if (startswith(word, "systemd.crash_chvt=")) {
305 if (safe_atoi(word + 19, &k) < 0)
306 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
310 } else if (startswith(word, "systemd.show_status=")) {
313 if ((r = parse_boolean(word + 20)) < 0)
314 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
317 } else if (startswith(word, "systemd.default_standard_output=")) {
320 if ((r = exec_output_from_string(word + 32)) < 0)
321 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
323 arg_default_std_output = r;
324 } else if (startswith(word, "systemd.default_standard_error=")) {
327 if ((r = exec_output_from_string(word + 31)) < 0)
328 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
330 arg_default_std_error = r;
331 } else if (startswith(word, "systemd.setenv=")) {
335 cenv = strdup(word + 15);
339 eq = strchr(cenv, '=');
343 log_warning("unsetenv failed %s. Ignoring.", strerror(errno));
346 r = setenv(cenv, eq + 1, 1);
348 log_warning("setenv failed %s. Ignoring.", strerror(errno));
351 #ifdef HAVE_SYSV_COMPAT
352 } else if (startswith(word, "systemd.sysv_console=")) {
355 if ((r = parse_boolean(word + 21)) < 0)
356 log_warning("Failed to parse SysV console switch %s. Ignoring.", word + 20);
358 arg_sysv_console = r;
361 } else if (startswith(word, "systemd.")) {
363 log_warning("Unknown kernel switch %s. Ignoring.", word);
365 log_info("Supported kernel switches:\n"
366 "systemd.unit=UNIT Default unit to start\n"
367 "systemd.dump_core=0|1 Dump core on crash\n"
368 "systemd.crash_shell=0|1 Run shell on crash\n"
369 "systemd.crash_chvt=N Change to VT #N on crash\n"
370 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
371 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
372 #ifdef HAVE_SYSV_COMPAT
373 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
375 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
377 "systemd.log_level=LEVEL Log level\n"
378 "systemd.log_color=0|1 Highlight important log messages\n"
379 "systemd.log_location=0|1 Include code location in log messages\n"
380 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
381 " Set default log output for services\n"
382 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
383 " Set default log error output for services\n");
385 } else if (streq(word, "quiet")) {
386 arg_show_status = false;
387 #ifdef HAVE_SYSV_COMPAT
388 arg_sysv_console = false;
393 /* SysV compatibility */
394 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
395 if (streq(word, rlmap[i]))
396 return set_default_unit(rlmap[i+1]);
402 static int config_parse_level2(
403 const char *filename,
416 log_set_max_level_from_string(rvalue);
420 static int config_parse_target(
421 const char *filename,
434 log_set_target_from_string(rvalue);
438 static int config_parse_color(
439 const char *filename,
452 log_show_color_from_string(rvalue);
456 static int config_parse_location(
457 const char *filename,
470 log_show_location_from_string(rvalue);
474 static int config_parse_cpu_affinity2(
475 const char *filename,
494 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
499 if (!(t = strndup(w, l)))
502 r = safe_atou(t, &cpu);
506 if (!(c = cpu_set_malloc(&ncpus)))
509 if (r < 0 || cpu >= ncpus) {
510 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
515 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
519 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
520 log_warning("Failed to set CPU affinity: %m");
528 static void strv_free_free(char ***l) {
540 static void free_join_controllers(void) {
541 if (!arg_join_controllers)
544 strv_free_free(arg_join_controllers);
545 arg_join_controllers = NULL;
548 static int config_parse_join_controllers(
549 const char *filename,
566 free_join_controllers();
568 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
571 s = strndup(w, length);
575 l = strv_split(s, ",");
580 if (strv_length(l) <= 1) {
585 if (!arg_join_controllers) {
586 arg_join_controllers = new(char**, 2);
587 if (!arg_join_controllers) {
592 arg_join_controllers[0] = l;
593 arg_join_controllers[1] = NULL;
600 t = new0(char**, n+2);
608 for (a = arg_join_controllers; *a; a++) {
610 if (strv_overlap(*a, l)) {
613 c = strv_merge(*a, l);
636 t[n++] = strv_uniq(l);
638 strv_free_free(arg_join_controllers);
639 arg_join_controllers = t;
646 static int parse_config_file(void) {
648 const ConfigTableItem items[] = {
649 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
650 { "Manager", "LogTarget", config_parse_target, 0, NULL },
651 { "Manager", "LogColor", config_parse_color, 0, NULL },
652 { "Manager", "LogLocation", config_parse_location, 0, NULL },
653 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
654 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
655 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
656 #ifdef HAVE_SYSV_COMPAT
657 { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console },
659 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
660 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
661 { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto },
662 { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto },
663 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
664 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
665 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
666 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
667 { "Manager", "RuntimeWatchdogSec", config_parse_usec, 0, &arg_runtime_watchdog },
668 { "Manager", "ShutdownWatchdogSec", config_parse_usec, 0, &arg_shutdown_watchdog },
669 { NULL, NULL, NULL, 0, NULL }
676 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
682 log_warning("Failed to open configuration file '%s': %m", fn);
686 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
688 log_warning("Failed to parse configuration file: %s", strerror(-r));
695 static int parse_proc_cmdline(void) {
696 char *line, *w, *state;
700 /* Don't read /proc/cmdline if we are in a container, since
701 * that is only relevant for the host system */
702 if (detect_container(NULL) > 0)
705 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
706 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
710 FOREACH_WORD_QUOTED(w, l, line, state) {
713 if (!(word = strndup(w, l))) {
718 r = parse_proc_cmdline_word(word);
732 static int parse_argv(int argc, char *argv[]) {
735 ARG_LOG_LEVEL = 0x100,
743 ARG_DUMP_CONFIGURATION_ITEMS,
751 ARG_DEFAULT_STD_OUTPUT,
752 ARG_DEFAULT_STD_ERROR
755 static const struct option options[] = {
756 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
757 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
758 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
759 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
760 { "unit", required_argument, NULL, ARG_UNIT },
761 { "system", no_argument, NULL, ARG_SYSTEM },
762 { "user", no_argument, NULL, ARG_USER },
763 { "test", no_argument, NULL, ARG_TEST },
764 { "help", no_argument, NULL, 'h' },
765 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
766 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
767 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
768 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
769 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
770 #ifdef HAVE_SYSV_COMPAT
771 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
773 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
774 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
775 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
776 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
788 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
793 if ((r = log_set_max_level_from_string(optarg)) < 0) {
794 log_error("Failed to parse log level %s.", optarg);
802 if ((r = log_set_target_from_string(optarg)) < 0) {
803 log_error("Failed to parse log target %s.", optarg);
812 if ((r = log_show_color_from_string(optarg)) < 0) {
813 log_error("Failed to parse log color setting %s.", optarg);
817 log_show_color(true);
821 case ARG_LOG_LOCATION:
824 if ((r = log_show_location_from_string(optarg)) < 0) {
825 log_error("Failed to parse log location setting %s.", optarg);
829 log_show_location(true);
833 case ARG_DEFAULT_STD_OUTPUT:
835 if ((r = exec_output_from_string(optarg)) < 0) {
836 log_error("Failed to parse default standard output setting %s.", optarg);
839 arg_default_std_output = r;
842 case ARG_DEFAULT_STD_ERROR:
844 if ((r = exec_output_from_string(optarg)) < 0) {
845 log_error("Failed to parse default standard error output setting %s.", optarg);
848 arg_default_std_error = r;
853 if ((r = set_default_unit(optarg)) < 0) {
854 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
861 arg_running_as = MANAGER_SYSTEM;
865 arg_running_as = MANAGER_USER;
869 arg_action = ACTION_TEST;
872 case ARG_DUMP_CONFIGURATION_ITEMS:
873 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
877 arg_dump_core = true;
880 case ARG_CRASH_SHELL:
881 arg_crash_shell = true;
884 case ARG_CONFIRM_SPAWN:
885 arg_confirm_spawn = true;
888 case ARG_SHOW_STATUS:
891 if ((r = parse_boolean(optarg)) < 0) {
892 log_error("Failed to show status boolean %s.", optarg);
897 arg_show_status = true;
899 #ifdef HAVE_SYSV_COMPAT
900 case ARG_SYSV_CONSOLE:
903 if ((r = parse_boolean(optarg)) < 0) {
904 log_error("Failed to SysV console boolean %s.", optarg);
907 arg_sysv_console = r;
909 arg_sysv_console = true;
913 case ARG_DESERIALIZE: {
917 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
918 log_error("Failed to parse deserialize option %s.", optarg);
922 if (!(f = fdopen(fd, "r"))) {
923 log_error("Failed to open serialization fd: %m");
928 fclose(serialization);
935 case ARG_INTROSPECT: {
936 const char * const * i = NULL;
938 for (i = bus_interface_table; *i; i += 2)
939 if (!optarg || streq(i[0], optarg)) {
940 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
943 fputs("</node>\n", stdout);
950 log_error("Unknown interface %s.", optarg);
952 arg_action = ACTION_DONE;
957 arg_action = ACTION_HELP;
961 log_set_max_level(LOG_DEBUG);
967 /* Just to eat away the sysvinit kernel
968 * cmdline args without getopt() error
969 * messages that we'll parse in
970 * parse_proc_cmdline_word() or ignore. */
975 log_error("Unknown option code %c", c);
982 if (optind < argc && getpid() != 1) {
983 /* Hmm, when we aren't run as init system
984 * let's complain about excess arguments */
986 log_error("Excess arguments.");
990 if (detect_container(NULL) > 0) {
993 /* All /proc/cmdline arguments the kernel didn't
994 * understand it passed to us. We're not really
995 * interested in that usually since /proc/cmdline is
996 * more interesting and complete. With one exception:
997 * if we are run in a container /proc/cmdline is not
998 * relevant for the container, hence we rely on argv[]
1001 for (a = argv; a < argv + argc; a++)
1002 if ((r = parse_proc_cmdline_word(*a)) < 0)
1009 static int help(void) {
1011 printf("%s [OPTIONS...]\n\n"
1012 "Starts up and maintains the system or user services.\n\n"
1013 " -h --help Show this help\n"
1014 " --test Determine startup sequence, dump it and exit\n"
1015 " --dump-configuration-items Dump understood unit configuration items\n"
1016 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1017 " --unit=UNIT Set default unit\n"
1018 " --system Run a system instance, even if PID != 1\n"
1019 " --user Run a user instance\n"
1020 " --dump-core Dump core on crash\n"
1021 " --crash-shell Run shell on crash\n"
1022 " --confirm-spawn Ask for confirmation when spawning processes\n"
1023 " --show-status[=0|1] Show status updates on the console during bootup\n"
1024 #ifdef HAVE_SYSV_COMPAT
1025 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
1027 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1028 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1029 " --log-color[=0|1] Highlight important log messages\n"
1030 " --log-location[=0|1] Include code location in log messages\n"
1031 " --default-standard-output= Set default standard output for services\n"
1032 " --default-standard-error= Set default standard error output for services\n",
1033 program_invocation_short_name);
1038 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1047 /* Make sure nothing is really destructed when we shut down */
1050 if ((r = manager_open_serialization(m, &f)) < 0) {
1051 log_error("Failed to create serialization file: %s", strerror(-r));
1055 if (!(fds = fdset_new())) {
1057 log_error("Failed to allocate fd set: %s", strerror(-r));
1061 if ((r = manager_serialize(m, f, fds)) < 0) {
1062 log_error("Failed to serialize state: %s", strerror(-r));
1066 if (fseeko(f, 0, SEEK_SET) < 0) {
1067 log_error("Failed to rewind serialization fd: %m");
1071 if ((r = fd_cloexec(fileno(f), false)) < 0) {
1072 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1076 if ((r = fdset_cloexec(fds, false)) < 0) {
1077 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1095 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1097 unsigned long long a, b;
1101 e = getenv("RD_TIMESTAMP");
1105 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1108 t->realtime = (usec_t) a;
1109 t->monotonic = (usec_t) b;
1114 static void test_mtab(void) {
1117 /* Check that /etc/mtab is a symlink */
1119 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1122 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1129 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1130 "This is not supported anymore. "
1131 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1134 static void test_usr(void) {
1136 /* Check that /usr is not a separate fs */
1138 if (dir_is_empty("/usr") <= 0)
1141 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1142 "Some things will probably break (sometimes even silently) in mysterious ways. "
1143 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1146 static void test_cgroups(void) {
1148 if (access("/proc/cgroups", F_OK) >= 0)
1151 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1152 "Systems without control groups are not supported. "
1153 "We will now sleep for 10s, and then continue boot-up. "
1154 "Expect breakage and please do not file bugs. "
1155 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1156 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1161 int main(int argc, char *argv[]) {
1163 int r, retval = EXIT_FAILURE;
1164 usec_t before_startup, after_startup;
1165 char timespan[FORMAT_TIMESPAN_MAX];
1167 bool reexecute = false;
1168 const char *shutdown_verb = NULL;
1169 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1170 static char systemd[] = "systemd";
1171 bool is_reexec = false;
1173 bool loaded_policy = false;
1174 bool arm_reboot_watchdog = false;
1176 #ifdef HAVE_SYSV_COMPAT
1177 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1178 /* This is compatibility support for SysV, where
1179 * calling init as a user is identical to telinit. */
1182 execv(SYSTEMCTL_BINARY_PATH, argv);
1183 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1188 /* Determine if this is a reexecution or normal bootup. We do
1189 * the full command line parsing much later, so let's just
1190 * have a quick peek here. */
1192 for (j = 1; j < argc; j++)
1193 if (streq(argv[j], "--deserialize")) {
1198 /* If we get started via the /sbin/init symlink then we are
1199 called 'init'. After a subsequent reexecution we are then
1200 called 'systemd'. That is confusing, hence let's call us
1201 systemd right-away. */
1202 program_invocation_short_name = systemd;
1203 prctl(PR_SET_NAME, systemd);
1208 log_show_color(isatty(STDERR_FILENO) > 0);
1209 log_show_location(false);
1210 log_set_max_level(LOG_INFO);
1212 if (getpid() == 1) {
1213 arg_running_as = MANAGER_SYSTEM;
1214 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_JOURNAL_OR_KMSG);
1217 if (selinux_setup(&loaded_policy) < 0)
1219 if (ima_setup() < 0)
1225 if (label_init() < 0)
1229 if (hwclock_is_localtime() > 0) {
1232 r = hwclock_apply_localtime_delta(&min);
1234 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1236 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1240 arg_running_as = MANAGER_USER;
1241 log_set_target(LOG_TARGET_AUTO);
1245 /* Initialize default unit */
1246 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1249 /* By default, mount "cpu" and "cpuacct" together */
1250 arg_join_controllers = new(char**, 2);
1251 if (!arg_join_controllers)
1254 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1255 arg_join_controllers[1] = NULL;
1257 if (!arg_join_controllers[0])
1260 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1261 * /proc/$PID/fd is available. */
1262 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1263 r = mount_setup(loaded_policy);
1268 /* Reset all signal handlers. */
1269 assert_se(reset_all_signal_handlers() == 0);
1271 /* If we are init, we can block sigkill. Yay. */
1272 ignore_signals(SIGNALS_IGNORE, -1);
1274 if (parse_config_file() < 0)
1277 if (arg_running_as == MANAGER_SYSTEM)
1278 if (parse_proc_cmdline() < 0)
1281 log_parse_environment();
1283 if (parse_argv(argc, argv) < 0)
1286 if (arg_action == ACTION_TEST && geteuid() == 0) {
1287 log_error("Don't run test mode as root.");
1291 if (arg_running_as == MANAGER_SYSTEM &&
1292 arg_action == ACTION_RUN &&
1293 running_in_chroot() > 0) {
1294 log_error("Cannot be run in a chroot() environment.");
1298 if (arg_action == ACTION_HELP) {
1301 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1302 unit_dump_config_items(stdout);
1303 retval = EXIT_SUCCESS;
1305 } else if (arg_action == ACTION_DONE) {
1306 retval = EXIT_SUCCESS;
1310 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1312 /* Close logging fds, in order not to confuse fdset below */
1315 /* Remember open file descriptors for later deserialization */
1316 if (serialization) {
1317 r = fdset_new_fill(&fds);
1319 log_error("Failed to allocate fd set: %s", strerror(-r));
1323 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1325 close_all_fds(NULL, 0);
1327 /* Set up PATH unless it is already set */
1329 #ifdef HAVE_SPLIT_USR
1330 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1332 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1334 arg_running_as == MANAGER_SYSTEM);
1336 if (arg_running_as == MANAGER_SYSTEM) {
1337 /* Parse the data passed to us. We leave this
1338 * variables set, but the manager later on will not
1339 * pass them on to our children. */
1340 parse_initrd_timestamp(&initrd_timestamp);
1342 /* Unset some environment variables passed in from the
1343 * kernel that don't really make sense for us. */
1347 /* When we are invoked by a shell, these might be set,
1348 * but make little sense to pass on */
1353 /* All other variables are left as is, so that clients
1354 * can still read them via /proc/1/environ */
1357 /* Move out of the way, so that we won't block unmounts */
1358 assert_se(chdir("/") == 0);
1360 if (arg_running_as == MANAGER_SYSTEM) {
1361 /* Become a session leader if we aren't one yet. */
1364 /* Disable the umask logic */
1368 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1369 dbus_connection_set_change_sigpipe(FALSE);
1371 /* Reset the console, but only if this is really init and we
1372 * are freshly booted */
1373 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1374 console_setup(getpid() == 1 && !is_reexec);
1378 /* Open the logging devices, if possible and necessary */
1381 /* Make sure we leave a core dump without panicing the
1384 install_crash_handler();
1386 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1387 r = mount_cgroup_controllers(arg_join_controllers);
1392 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1393 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1395 if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1398 if (arg_show_status || plymouth_running())
1411 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
1412 watchdog_set_timeout(&arg_runtime_watchdog);
1414 r = manager_new(arg_running_as, &m);
1416 log_error("Failed to allocate manager object: %s", strerror(-r));
1420 m->confirm_spawn = arg_confirm_spawn;
1421 #ifdef HAVE_SYSV_COMPAT
1422 m->sysv_console = arg_sysv_console;
1424 m->mount_auto = arg_mount_auto;
1425 m->swap_auto = arg_swap_auto;
1426 m->default_std_output = arg_default_std_output;
1427 m->default_std_error = arg_default_std_error;
1428 m->runtime_watchdog = arg_runtime_watchdog;
1429 m->shutdown_watchdog = arg_shutdown_watchdog;
1431 if (dual_timestamp_is_set(&initrd_timestamp))
1432 m->initrd_timestamp = initrd_timestamp;
1434 if (arg_default_controllers)
1435 manager_set_default_controllers(m, arg_default_controllers);
1437 manager_set_show_status(m, arg_show_status);
1439 before_startup = now(CLOCK_MONOTONIC);
1441 r = manager_startup(m, serialization, fds);
1443 log_error("Failed to fully start up daemon: %s", strerror(-r));
1446 /* This will close all file descriptors that were opened, but
1447 * not claimed by any unit. */
1453 if (serialization) {
1454 fclose(serialization);
1455 serialization = NULL;
1458 Unit *target = NULL;
1459 Job *default_unit_job;
1461 dbus_error_init(&error);
1463 log_debug("Activating default unit: %s", arg_default_unit);
1465 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1467 log_error("Failed to load default target: %s", bus_error(&error, r));
1468 dbus_error_free(&error);
1469 } else if (target->load_state == UNIT_ERROR)
1470 log_error("Failed to load default target: %s", strerror(-target->load_error));
1471 else if (target->load_state == UNIT_MASKED)
1472 log_error("Default target masked.");
1474 if (!target || target->load_state != UNIT_LOADED) {
1475 log_info("Trying to load rescue target...");
1477 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1479 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1480 dbus_error_free(&error);
1482 } else if (target->load_state == UNIT_ERROR) {
1483 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1485 } else if (target->load_state == UNIT_MASKED) {
1486 log_error("Rescue target masked.");
1491 assert(target->load_state == UNIT_LOADED);
1493 if (arg_action == ACTION_TEST) {
1494 printf("-> By units:\n");
1495 manager_dump_units(m, stdout, "\t");
1498 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1500 log_error("Failed to start default target: %s", bus_error(&error, r));
1501 dbus_error_free(&error);
1504 m->default_unit_job_id = default_unit_job->id;
1506 after_startup = now(CLOCK_MONOTONIC);
1507 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1508 "Loaded units and determined initial transaction in %s.",
1509 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1511 if (arg_action == ACTION_TEST) {
1512 printf("-> By jobs:\n");
1513 manager_dump_jobs(m, stdout, "\t");
1514 retval = EXIT_SUCCESS;
1520 r = manager_loop(m);
1522 log_error("Failed to run mainloop: %s", strerror(-r));
1526 switch (m->exit_code) {
1529 retval = EXIT_SUCCESS;
1533 case MANAGER_RELOAD:
1534 log_info("Reloading.");
1535 r = manager_reload(m);
1537 log_error("Failed to reload: %s", strerror(-r));
1540 case MANAGER_REEXECUTE:
1541 if (prepare_reexecute(m, &serialization, &fds) < 0)
1545 log_notice("Reexecuting.");
1548 case MANAGER_REBOOT:
1549 case MANAGER_POWEROFF:
1551 case MANAGER_KEXEC: {
1552 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1553 [MANAGER_REBOOT] = "reboot",
1554 [MANAGER_POWEROFF] = "poweroff",
1555 [MANAGER_HALT] = "halt",
1556 [MANAGER_KEXEC] = "kexec"
1559 assert_se(shutdown_verb = table[m->exit_code]);
1560 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1562 log_notice("Shutting down.");
1567 assert_not_reached("Unknown exit code.");
1575 free(arg_default_unit);
1576 strv_free(arg_default_controllers);
1577 free_join_controllers();
1584 const char *args[15];
1588 assert(serialization);
1591 args[i++] = SYSTEMD_BINARY_PATH;
1593 args[i++] = "--log-level";
1594 args[i++] = log_level_to_string(log_get_max_level());
1596 args[i++] = "--log-target";
1597 args[i++] = log_target_to_string(log_get_target());
1599 if (arg_running_as == MANAGER_SYSTEM)
1600 args[i++] = "--system";
1602 args[i++] = "--user";
1605 args[i++] = "--dump-core";
1607 if (arg_crash_shell)
1608 args[i++] = "--crash-shell";
1610 if (arg_confirm_spawn)
1611 args[i++] = "--confirm-spawn";
1613 if (arg_show_status)
1614 args[i++] = "--show-status=1";
1616 args[i++] = "--show-status=0";
1618 #ifdef HAVE_SYSV_COMPAT
1619 if (arg_sysv_console)
1620 args[i++] = "--sysv-console=1";
1622 args[i++] = "--sysv-console=0";
1625 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1628 args[i++] = "--deserialize";
1633 assert(i <= ELEMENTSOF(args));
1635 /* Close and disarm the watchdog, so that the new
1636 * instance can reinitialize it, but doesn't get
1637 * rebooted while we do that */
1638 watchdog_close(true);
1640 execv(args[0], (char* const*) args);
1642 log_error("Failed to reexecute: %m");
1646 fclose(serialization);
1651 if (shutdown_verb) {
1652 const char * command_line[] = {
1653 SYSTEMD_SHUTDOWN_BINARY_PATH,
1659 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1662 /* If we reboot let's set the shutdown
1663 * watchdog and tell the shutdown binary to
1664 * repeatedly ping it */
1665 watchdog_set_timeout(&arg_shutdown_watchdog);
1666 watchdog_close(false);
1668 /* Tell the binary how often to ping */
1669 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1672 env_block = strv_append(environ, e);
1674 env_block = strv_copy(environ);
1675 watchdog_close(true);
1678 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, env_block);
1680 log_error("Failed to execute shutdown binary, freezing: %m");