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 General Public License as published by
10 the Free Software Foundation; either version 2 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 General Public License for more details.
18 You should have received a copy of the GNU 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 "mount-setup.h"
39 #include "hostname-setup.h"
40 #include "loopback-setup.h"
41 #include "kmod-setup.h"
42 #include "locale-setup.h"
43 #include "selinux-setup.h"
44 #include "ima-setup.h"
45 #include "machine-id-setup.h"
46 #include "load-fragment.h"
49 #include "conf-parser.h"
50 #include "bus-errors.h"
63 ACTION_DUMP_CONFIGURATION_ITEMS,
65 } arg_action = ACTION_RUN;
67 static char *arg_default_unit = NULL;
68 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
70 static bool arg_dump_core = true;
71 static bool arg_crash_shell = false;
72 static int arg_crash_chvt = -1;
73 static bool arg_confirm_spawn = false;
74 static bool arg_show_status = true;
75 #ifdef HAVE_SYSV_COMPAT
76 static bool arg_sysv_console = true;
78 static bool arg_mount_auto = true;
79 static bool arg_swap_auto = true;
80 static char **arg_default_controllers = NULL;
81 static char ***arg_join_controllers = NULL;
82 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
83 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
84 static usec_t arg_runtime_watchdog = 0;
85 static usec_t arg_shutdown_watchdog = 10 * USEC_PER_MINUTE;
87 static FILE* serialization = NULL;
89 static void nop_handler(int sig) {
92 _noreturn_ static void crash(int sig) {
95 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
100 /* We want to wait for the core process, hence let's enable SIGCHLD */
102 sa.sa_handler = nop_handler;
103 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
104 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
106 if ((pid = fork()) < 0)
107 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
112 /* Enable default signal handler for core dump */
114 sa.sa_handler = SIG_DFL;
115 assert_se(sigaction(sig, &sa, NULL) == 0);
117 /* Don't limit the core dump size */
119 rl.rlim_cur = RLIM_INFINITY;
120 rl.rlim_max = RLIM_INFINITY;
121 setrlimit(RLIMIT_CORE, &rl);
123 /* Just to be sure... */
124 assert_se(chdir("/") == 0);
126 /* Raise the signal again */
129 assert_not_reached("We shouldn't be here...");
136 /* Order things nicely. */
137 if ((r = wait_for_terminate(pid, &status)) < 0)
138 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
139 else if (status.si_code != CLD_DUMPED)
140 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
142 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
147 chvt(arg_crash_chvt);
149 if (arg_crash_shell) {
153 log_info("Executing crash shell in 10s...");
156 /* Let the kernel reap children for us */
158 sa.sa_handler = SIG_IGN;
159 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
160 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
162 if ((pid = fork()) < 0)
163 log_error("Failed to fork off crash shell: %s", strerror(errno));
167 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
168 log_error("Failed to acquire terminal: %s", strerror(-fd));
169 else if ((r = make_stdio(fd)) < 0)
170 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
172 execl("/bin/sh", "/bin/sh", NULL);
174 log_error("execl() failed: %s", strerror(errno));
178 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
181 log_info("Freezing execution.");
185 static void install_crash_handler(void) {
190 sa.sa_handler = crash;
191 sa.sa_flags = SA_NODEFER;
193 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
196 static int console_setup(bool do_reset) {
199 /* If we are init, we connect stdin/stdout/stderr to /dev/null
200 * and make sure we don't have a controlling tty. */
207 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
209 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
213 /* We don't want to force text mode.
214 * plymouth may be showing pictures already from initrd. */
215 r = reset_terminal_fd(tty_fd, false);
217 log_error("Failed to reset /dev/console: %s", strerror(-r));
219 close_nointr_nofail(tty_fd);
223 static int set_default_unit(const char *u) {
228 if (!(c = strdup(u)))
231 free(arg_default_unit);
232 arg_default_unit = c;
236 static int parse_proc_cmdline_word(const char *word) {
238 static const char * const rlmap[] = {
239 "emergency", SPECIAL_EMERGENCY_TARGET,
240 "-b", SPECIAL_EMERGENCY_TARGET,
241 "single", SPECIAL_RESCUE_TARGET,
242 "-s", SPECIAL_RESCUE_TARGET,
243 "s", SPECIAL_RESCUE_TARGET,
244 "S", SPECIAL_RESCUE_TARGET,
245 "1", SPECIAL_RESCUE_TARGET,
246 "2", SPECIAL_RUNLEVEL2_TARGET,
247 "3", SPECIAL_RUNLEVEL3_TARGET,
248 "4", SPECIAL_RUNLEVEL4_TARGET,
249 "5", SPECIAL_RUNLEVEL5_TARGET,
254 if (startswith(word, "systemd.unit="))
255 return set_default_unit(word + 13);
257 else if (startswith(word, "systemd.log_target=")) {
259 if (log_set_target_from_string(word + 19) < 0)
260 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
262 } else if (startswith(word, "systemd.log_level=")) {
264 if (log_set_max_level_from_string(word + 18) < 0)
265 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
267 } else if (startswith(word, "systemd.log_color=")) {
269 if (log_show_color_from_string(word + 18) < 0)
270 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
272 } else if (startswith(word, "systemd.log_location=")) {
274 if (log_show_location_from_string(word + 21) < 0)
275 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
277 } else if (startswith(word, "systemd.dump_core=")) {
280 if ((r = parse_boolean(word + 18)) < 0)
281 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
285 } else if (startswith(word, "systemd.crash_shell=")) {
288 if ((r = parse_boolean(word + 20)) < 0)
289 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
293 } else if (startswith(word, "systemd.confirm_spawn=")) {
296 if ((r = parse_boolean(word + 22)) < 0)
297 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
299 arg_confirm_spawn = r;
301 } else if (startswith(word, "systemd.crash_chvt=")) {
304 if (safe_atoi(word + 19, &k) < 0)
305 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
309 } else if (startswith(word, "systemd.show_status=")) {
312 if ((r = parse_boolean(word + 20)) < 0)
313 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
316 } else if (startswith(word, "systemd.default_standard_output=")) {
319 if ((r = exec_output_from_string(word + 32)) < 0)
320 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
322 arg_default_std_output = r;
323 } else if (startswith(word, "systemd.default_standard_error=")) {
326 if ((r = exec_output_from_string(word + 31)) < 0)
327 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
329 arg_default_std_error = r;
330 } else if (startswith(word, "systemd.setenv=")) {
334 cenv = strdup(word + 15);
338 eq = strchr(cenv, '=');
342 log_warning("unsetenv failed %s. Ignoring.", strerror(errno));
345 r = setenv(cenv, eq + 1, 1);
347 log_warning("setenv failed %s. Ignoring.", strerror(errno));
350 #ifdef HAVE_SYSV_COMPAT
351 } else if (startswith(word, "systemd.sysv_console=")) {
354 if ((r = parse_boolean(word + 21)) < 0)
355 log_warning("Failed to parse SysV console switch %s. Ignoring.", word + 20);
357 arg_sysv_console = r;
360 } else if (startswith(word, "systemd.")) {
362 log_warning("Unknown kernel switch %s. Ignoring.", word);
364 log_info("Supported kernel switches:\n"
365 "systemd.unit=UNIT Default unit to start\n"
366 "systemd.dump_core=0|1 Dump core on crash\n"
367 "systemd.crash_shell=0|1 Run shell on crash\n"
368 "systemd.crash_chvt=N Change to VT #N on crash\n"
369 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
370 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
371 #ifdef HAVE_SYSV_COMPAT
372 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
374 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
376 "systemd.log_level=LEVEL Log level\n"
377 "systemd.log_color=0|1 Highlight important log messages\n"
378 "systemd.log_location=0|1 Include code location in log messages\n"
379 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
380 " Set default log output for services\n"
381 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
382 " Set default log error output for services\n");
384 } else if (streq(word, "quiet")) {
385 arg_show_status = false;
386 #ifdef HAVE_SYSV_COMPAT
387 arg_sysv_console = false;
392 /* SysV compatibility */
393 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
394 if (streq(word, rlmap[i]))
395 return set_default_unit(rlmap[i+1]);
401 static int config_parse_level2(
402 const char *filename,
415 log_set_max_level_from_string(rvalue);
419 static int config_parse_target(
420 const char *filename,
433 log_set_target_from_string(rvalue);
437 static int config_parse_color(
438 const char *filename,
451 log_show_color_from_string(rvalue);
455 static int config_parse_location(
456 const char *filename,
469 log_show_location_from_string(rvalue);
473 static int config_parse_cpu_affinity2(
474 const char *filename,
493 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
498 if (!(t = strndup(w, l)))
501 r = safe_atou(t, &cpu);
505 if (!(c = cpu_set_malloc(&ncpus)))
508 if (r < 0 || cpu >= ncpus) {
509 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
514 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
518 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
519 log_warning("Failed to set CPU affinity: %m");
527 static void strv_free_free(char ***l) {
539 static void free_join_controllers(void) {
540 if (!arg_join_controllers)
543 strv_free_free(arg_join_controllers);
544 arg_join_controllers = NULL;
547 static int config_parse_join_controllers(
548 const char *filename,
565 free_join_controllers();
567 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
570 s = strndup(w, length);
574 l = strv_split(s, ",");
579 if (strv_length(l) <= 1) {
584 if (!arg_join_controllers) {
585 arg_join_controllers = new(char**, 2);
586 if (!arg_join_controllers) {
591 arg_join_controllers[0] = l;
592 arg_join_controllers[1] = NULL;
599 t = new0(char**, n+2);
607 for (a = arg_join_controllers; *a; a++) {
609 if (strv_overlap(*a, l)) {
612 c = strv_merge(*a, l);
635 t[n++] = strv_uniq(l);
637 strv_free_free(arg_join_controllers);
638 arg_join_controllers = t;
645 static int parse_config_file(void) {
647 const ConfigTableItem items[] = {
648 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
649 { "Manager", "LogTarget", config_parse_target, 0, NULL },
650 { "Manager", "LogColor", config_parse_color, 0, NULL },
651 { "Manager", "LogLocation", config_parse_location, 0, NULL },
652 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
653 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
654 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
655 #ifdef HAVE_SYSV_COMPAT
656 { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console },
658 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
659 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
660 { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto },
661 { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto },
662 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
663 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
664 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
665 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
666 { "Manager", "RuntimeWatchdogSec", config_parse_usec, 0, &arg_runtime_watchdog },
667 { "Manager", "ShutdownWatchdogSec", config_parse_usec, 0, &arg_shutdown_watchdog },
668 { NULL, NULL, NULL, 0, NULL }
675 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
681 log_warning("Failed to open configuration file '%s': %m", fn);
685 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
687 log_warning("Failed to parse configuration file: %s", strerror(-r));
694 static int parse_proc_cmdline(void) {
695 char *line, *w, *state;
699 /* Don't read /proc/cmdline if we are in a container, since
700 * that is only relevant for the host system */
701 if (detect_container(NULL) > 0)
704 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
705 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
709 FOREACH_WORD_QUOTED(w, l, line, state) {
712 if (!(word = strndup(w, l))) {
717 r = parse_proc_cmdline_word(word);
731 static int parse_argv(int argc, char *argv[]) {
734 ARG_LOG_LEVEL = 0x100,
742 ARG_DUMP_CONFIGURATION_ITEMS,
750 ARG_DEFAULT_STD_OUTPUT,
751 ARG_DEFAULT_STD_ERROR
754 static const struct option options[] = {
755 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
756 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
757 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
758 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
759 { "unit", required_argument, NULL, ARG_UNIT },
760 { "system", no_argument, NULL, ARG_SYSTEM },
761 { "user", no_argument, NULL, ARG_USER },
762 { "test", no_argument, NULL, ARG_TEST },
763 { "help", no_argument, NULL, 'h' },
764 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
765 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
766 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
767 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
768 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
769 #ifdef HAVE_SYSV_COMPAT
770 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
772 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
773 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
774 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
775 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
787 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
792 if ((r = log_set_max_level_from_string(optarg)) < 0) {
793 log_error("Failed to parse log level %s.", optarg);
801 if ((r = log_set_target_from_string(optarg)) < 0) {
802 log_error("Failed to parse log target %s.", optarg);
811 if ((r = log_show_color_from_string(optarg)) < 0) {
812 log_error("Failed to parse log color setting %s.", optarg);
816 log_show_color(true);
820 case ARG_LOG_LOCATION:
823 if ((r = log_show_location_from_string(optarg)) < 0) {
824 log_error("Failed to parse log location setting %s.", optarg);
828 log_show_location(true);
832 case ARG_DEFAULT_STD_OUTPUT:
834 if ((r = exec_output_from_string(optarg)) < 0) {
835 log_error("Failed to parse default standard output setting %s.", optarg);
838 arg_default_std_output = r;
841 case ARG_DEFAULT_STD_ERROR:
843 if ((r = exec_output_from_string(optarg)) < 0) {
844 log_error("Failed to parse default standard error output setting %s.", optarg);
847 arg_default_std_error = r;
852 if ((r = set_default_unit(optarg)) < 0) {
853 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
860 arg_running_as = MANAGER_SYSTEM;
864 arg_running_as = MANAGER_USER;
868 arg_action = ACTION_TEST;
871 case ARG_DUMP_CONFIGURATION_ITEMS:
872 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
876 arg_dump_core = true;
879 case ARG_CRASH_SHELL:
880 arg_crash_shell = true;
883 case ARG_CONFIRM_SPAWN:
884 arg_confirm_spawn = true;
887 case ARG_SHOW_STATUS:
890 if ((r = parse_boolean(optarg)) < 0) {
891 log_error("Failed to show status boolean %s.", optarg);
896 arg_show_status = true;
898 #ifdef HAVE_SYSV_COMPAT
899 case ARG_SYSV_CONSOLE:
902 if ((r = parse_boolean(optarg)) < 0) {
903 log_error("Failed to SysV console boolean %s.", optarg);
906 arg_sysv_console = r;
908 arg_sysv_console = true;
912 case ARG_DESERIALIZE: {
916 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
917 log_error("Failed to parse deserialize option %s.", optarg);
921 if (!(f = fdopen(fd, "r"))) {
922 log_error("Failed to open serialization fd: %m");
927 fclose(serialization);
934 case ARG_INTROSPECT: {
935 const char * const * i = NULL;
937 for (i = bus_interface_table; *i; i += 2)
938 if (!optarg || streq(i[0], optarg)) {
939 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
942 fputs("</node>\n", stdout);
949 log_error("Unknown interface %s.", optarg);
951 arg_action = ACTION_DONE;
956 arg_action = ACTION_HELP;
960 log_set_max_level(LOG_DEBUG);
966 /* Just to eat away the sysvinit kernel
967 * cmdline args without getopt() error
968 * messages that we'll parse in
969 * parse_proc_cmdline_word() or ignore. */
974 log_error("Unknown option code %c", c);
981 if (optind < argc && getpid() != 1) {
982 /* Hmm, when we aren't run as init system
983 * let's complain about excess arguments */
985 log_error("Excess arguments.");
989 if (detect_container(NULL) > 0) {
992 /* All /proc/cmdline arguments the kernel didn't
993 * understand it passed to us. We're not really
994 * interested in that usually since /proc/cmdline is
995 * more interesting and complete. With one exception:
996 * if we are run in a container /proc/cmdline is not
997 * relevant for the container, hence we rely on argv[]
1000 for (a = argv; a < argv + argc; a++)
1001 if ((r = parse_proc_cmdline_word(*a)) < 0)
1008 static int help(void) {
1010 printf("%s [OPTIONS...]\n\n"
1011 "Starts up and maintains the system or user services.\n\n"
1012 " -h --help Show this help\n"
1013 " --test Determine startup sequence, dump it and exit\n"
1014 " --dump-configuration-items Dump understood unit configuration items\n"
1015 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1016 " --unit=UNIT Set default unit\n"
1017 " --system Run a system instance, even if PID != 1\n"
1018 " --user Run a user instance\n"
1019 " --dump-core Dump core on crash\n"
1020 " --crash-shell Run shell on crash\n"
1021 " --confirm-spawn Ask for confirmation when spawning processes\n"
1022 " --show-status[=0|1] Show status updates on the console during bootup\n"
1023 #ifdef HAVE_SYSV_COMPAT
1024 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
1026 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1027 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1028 " --log-color[=0|1] Highlight important log messages\n"
1029 " --log-location[=0|1] Include code location in log messages\n"
1030 " --default-standard-output= Set default standard output for services\n"
1031 " --default-standard-error= Set default standard error output for services\n",
1032 program_invocation_short_name);
1037 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1046 /* Make sure nothing is really destructed when we shut down */
1049 if ((r = manager_open_serialization(m, &f)) < 0) {
1050 log_error("Failed to create serialization file: %s", strerror(-r));
1054 if (!(fds = fdset_new())) {
1056 log_error("Failed to allocate fd set: %s", strerror(-r));
1060 if ((r = manager_serialize(m, f, fds)) < 0) {
1061 log_error("Failed to serialize state: %s", strerror(-r));
1065 if (fseeko(f, 0, SEEK_SET) < 0) {
1066 log_error("Failed to rewind serialization fd: %m");
1070 if ((r = fd_cloexec(fileno(f), false)) < 0) {
1071 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1075 if ((r = fdset_cloexec(fds, false)) < 0) {
1076 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1094 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1096 unsigned long long a, b;
1100 e = getenv("RD_TIMESTAMP");
1104 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1107 t->realtime = (usec_t) a;
1108 t->monotonic = (usec_t) b;
1113 static void test_mtab(void) {
1116 /* Check that /etc/mtab is a symlink */
1118 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1121 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1128 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1129 "This is not supported anymore. "
1130 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1133 static void test_usr(void) {
1135 /* Check that /usr is not a separate fs */
1137 if (dir_is_empty("/usr") <= 0)
1140 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1141 "Some things will probably break (sometimes even silently) in mysterious ways. "
1142 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1145 static void test_cgroups(void) {
1147 if (access("/proc/cgroups", F_OK) >= 0)
1150 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1151 "Systems without control groups are not supported. "
1152 "We will now sleep for 10s, and then continue boot-up. "
1153 "Expect breakage and please do not file bugs. "
1154 "Instead fix your kernel and enable CONFIG_CGROUPS. "
1155 "Consult http://0pointer.de/blog/projects/cgroups-vs-cgroups.html for more information.");
1160 int main(int argc, char *argv[]) {
1162 int r, retval = EXIT_FAILURE;
1163 usec_t before_startup, after_startup;
1164 char timespan[FORMAT_TIMESPAN_MAX];
1166 bool reexecute = false;
1167 const char *shutdown_verb = NULL;
1168 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1169 static char systemd[] = "systemd";
1170 bool is_reexec = false;
1172 bool loaded_policy = false;
1173 bool arm_reboot_watchdog = false;
1175 #ifdef HAVE_SYSV_COMPAT
1176 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1177 /* This is compatibility support for SysV, where
1178 * calling init as a user is identical to telinit. */
1181 execv(SYSTEMCTL_BINARY_PATH, argv);
1182 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1187 /* Determine if this is a reexecution or normal bootup. We do
1188 * the full command line parsing much later, so let's just
1189 * have a quick peek here. */
1191 for (j = 1; j < argc; j++)
1192 if (streq(argv[j], "--deserialize")) {
1197 /* If we get started via the /sbin/init symlink then we are
1198 called 'init'. After a subsequent reexecution we are then
1199 called 'systemd'. That is confusing, hence let's call us
1200 systemd right-away. */
1201 program_invocation_short_name = systemd;
1202 prctl(PR_SET_NAME, systemd);
1207 log_show_color(isatty(STDERR_FILENO) > 0);
1208 log_show_location(false);
1209 log_set_max_level(LOG_INFO);
1211 if (getpid() == 1) {
1212 arg_running_as = MANAGER_SYSTEM;
1213 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_JOURNAL_OR_KMSG);
1216 if (selinux_setup(&loaded_policy) < 0)
1218 if (ima_setup() < 0)
1224 if (label_init() < 0)
1228 if (hwclock_is_localtime() > 0) {
1231 r = hwclock_apply_localtime_delta(&min);
1233 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1235 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1239 arg_running_as = MANAGER_USER;
1240 log_set_target(LOG_TARGET_AUTO);
1244 /* Initialize default unit */
1245 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1248 /* By default, mount "cpu" and "cpuacct" together */
1249 arg_join_controllers = new(char**, 2);
1250 if (!arg_join_controllers)
1253 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1254 arg_join_controllers[1] = NULL;
1256 if (!arg_join_controllers[0])
1259 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1260 * /proc/$PID/fd is available. */
1261 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1262 r = mount_setup(loaded_policy);
1267 /* Reset all signal handlers. */
1268 assert_se(reset_all_signal_handlers() == 0);
1270 /* If we are init, we can block sigkill. Yay. */
1271 ignore_signals(SIGNALS_IGNORE, -1);
1273 if (parse_config_file() < 0)
1276 if (arg_running_as == MANAGER_SYSTEM)
1277 if (parse_proc_cmdline() < 0)
1280 log_parse_environment();
1282 if (parse_argv(argc, argv) < 0)
1285 if (arg_action == ACTION_TEST && geteuid() == 0) {
1286 log_error("Don't run test mode as root.");
1290 if (arg_running_as == MANAGER_SYSTEM &&
1291 arg_action == ACTION_RUN &&
1292 running_in_chroot() > 0) {
1293 log_error("Cannot be run in a chroot() environment.");
1297 if (arg_action == ACTION_HELP) {
1300 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1301 unit_dump_config_items(stdout);
1302 retval = EXIT_SUCCESS;
1304 } else if (arg_action == ACTION_DONE) {
1305 retval = EXIT_SUCCESS;
1309 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1311 /* Close logging fds, in order not to confuse fdset below */
1314 /* Remember open file descriptors for later deserialization */
1315 if (serialization) {
1316 r = fdset_new_fill(&fds);
1318 log_error("Failed to allocate fd set: %s", strerror(-r));
1322 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1324 close_all_fds(NULL, 0);
1326 /* Set up PATH unless it is already set */
1328 #ifdef HAVE_SPLIT_USR
1329 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1331 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1333 arg_running_as == MANAGER_SYSTEM);
1335 if (arg_running_as == MANAGER_SYSTEM) {
1336 /* Parse the data passed to us. We leave this
1337 * variables set, but the manager later on will not
1338 * pass them on to our children. */
1339 parse_initrd_timestamp(&initrd_timestamp);
1341 /* Unset some environment variables passed in from the
1342 * kernel that don't really make sense for us. */
1346 /* When we are invoked by a shell, these might be set,
1347 * but make little sense to pass on */
1352 /* All other variables are left as is, so that clients
1353 * can still read them via /proc/1/environ */
1356 /* Move out of the way, so that we won't block unmounts */
1357 assert_se(chdir("/") == 0);
1359 if (arg_running_as == MANAGER_SYSTEM) {
1360 /* Become a session leader if we aren't one yet. */
1363 /* Disable the umask logic */
1367 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1368 dbus_connection_set_change_sigpipe(FALSE);
1370 /* Reset the console, but only if this is really init and we
1371 * are freshly booted */
1372 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1373 console_setup(getpid() == 1 && !is_reexec);
1377 /* Open the logging devices, if possible and necessary */
1380 /* Make sure we leave a core dump without panicing the
1383 install_crash_handler();
1385 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1386 r = mount_cgroup_controllers(arg_join_controllers);
1391 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1392 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1394 if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1397 if (arg_show_status || plymouth_running())
1410 if (arg_running_as == MANAGER_SYSTEM && arg_runtime_watchdog > 0)
1411 watchdog_set_timeout(&arg_runtime_watchdog);
1413 r = manager_new(arg_running_as, &m);
1415 log_error("Failed to allocate manager object: %s", strerror(-r));
1419 m->confirm_spawn = arg_confirm_spawn;
1420 #ifdef HAVE_SYSV_COMPAT
1421 m->sysv_console = arg_sysv_console;
1423 m->mount_auto = arg_mount_auto;
1424 m->swap_auto = arg_swap_auto;
1425 m->default_std_output = arg_default_std_output;
1426 m->default_std_error = arg_default_std_error;
1427 m->runtime_watchdog = arg_runtime_watchdog;
1428 m->shutdown_watchdog = arg_shutdown_watchdog;
1430 if (dual_timestamp_is_set(&initrd_timestamp))
1431 m->initrd_timestamp = initrd_timestamp;
1433 if (arg_default_controllers)
1434 manager_set_default_controllers(m, arg_default_controllers);
1436 manager_set_show_status(m, arg_show_status);
1438 before_startup = now(CLOCK_MONOTONIC);
1440 r = manager_startup(m, serialization, fds);
1442 log_error("Failed to fully start up daemon: %s", strerror(-r));
1445 /* This will close all file descriptors that were opened, but
1446 * not claimed by any unit. */
1452 if (serialization) {
1453 fclose(serialization);
1454 serialization = NULL;
1457 Unit *target = NULL;
1458 Job *default_unit_job;
1460 dbus_error_init(&error);
1462 log_debug("Activating default unit: %s", arg_default_unit);
1464 r = manager_load_unit(m, arg_default_unit, NULL, &error, &target);
1466 log_error("Failed to load default target: %s", bus_error(&error, r));
1467 dbus_error_free(&error);
1468 } else if (target->load_state == UNIT_ERROR)
1469 log_error("Failed to load default target: %s", strerror(-target->load_error));
1470 else if (target->load_state == UNIT_MASKED)
1471 log_error("Default target masked.");
1473 if (!target || target->load_state != UNIT_LOADED) {
1474 log_info("Trying to load rescue target...");
1476 r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target);
1478 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1479 dbus_error_free(&error);
1481 } else if (target->load_state == UNIT_ERROR) {
1482 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1484 } else if (target->load_state == UNIT_MASKED) {
1485 log_error("Rescue target masked.");
1490 assert(target->load_state == UNIT_LOADED);
1492 if (arg_action == ACTION_TEST) {
1493 printf("-> By units:\n");
1494 manager_dump_units(m, stdout, "\t");
1497 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1499 log_error("Failed to start default target: %s", bus_error(&error, r));
1500 dbus_error_free(&error);
1503 m->default_unit_job_id = default_unit_job->id;
1505 after_startup = now(CLOCK_MONOTONIC);
1506 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1507 "Loaded units and determined initial transaction in %s.",
1508 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1510 if (arg_action == ACTION_TEST) {
1511 printf("-> By jobs:\n");
1512 manager_dump_jobs(m, stdout, "\t");
1513 retval = EXIT_SUCCESS;
1519 r = manager_loop(m);
1521 log_error("Failed to run mainloop: %s", strerror(-r));
1525 switch (m->exit_code) {
1528 retval = EXIT_SUCCESS;
1532 case MANAGER_RELOAD:
1533 log_info("Reloading.");
1534 r = manager_reload(m);
1536 log_error("Failed to reload: %s", strerror(-r));
1539 case MANAGER_REEXECUTE:
1540 if (prepare_reexecute(m, &serialization, &fds) < 0)
1544 log_notice("Reexecuting.");
1547 case MANAGER_REBOOT:
1548 case MANAGER_POWEROFF:
1550 case MANAGER_KEXEC: {
1551 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1552 [MANAGER_REBOOT] = "reboot",
1553 [MANAGER_POWEROFF] = "poweroff",
1554 [MANAGER_HALT] = "halt",
1555 [MANAGER_KEXEC] = "kexec"
1558 assert_se(shutdown_verb = table[m->exit_code]);
1559 arm_reboot_watchdog = m->exit_code == MANAGER_REBOOT;
1561 log_notice("Shutting down.");
1566 assert_not_reached("Unknown exit code.");
1574 free(arg_default_unit);
1575 strv_free(arg_default_controllers);
1576 free_join_controllers();
1583 const char *args[15];
1587 assert(serialization);
1590 args[i++] = SYSTEMD_BINARY_PATH;
1592 args[i++] = "--log-level";
1593 args[i++] = log_level_to_string(log_get_max_level());
1595 args[i++] = "--log-target";
1596 args[i++] = log_target_to_string(log_get_target());
1598 if (arg_running_as == MANAGER_SYSTEM)
1599 args[i++] = "--system";
1601 args[i++] = "--user";
1604 args[i++] = "--dump-core";
1606 if (arg_crash_shell)
1607 args[i++] = "--crash-shell";
1609 if (arg_confirm_spawn)
1610 args[i++] = "--confirm-spawn";
1612 if (arg_show_status)
1613 args[i++] = "--show-status=1";
1615 args[i++] = "--show-status=0";
1617 #ifdef HAVE_SYSV_COMPAT
1618 if (arg_sysv_console)
1619 args[i++] = "--sysv-console=1";
1621 args[i++] = "--sysv-console=0";
1624 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1627 args[i++] = "--deserialize";
1632 assert(i <= ELEMENTSOF(args));
1634 /* Close and disarm the watchdog, so that the new
1635 * instance can reinitialize it, but doesn't get
1636 * rebooted while we do that */
1637 watchdog_close(true);
1639 execv(args[0], (char* const*) args);
1641 log_error("Failed to reexecute: %m");
1645 fclose(serialization);
1650 if (shutdown_verb) {
1653 const char * command_line[] = {
1654 SYSTEMD_SHUTDOWN_BINARY_PATH,
1658 const char * env_block[] = {
1663 if (arm_reboot_watchdog && arg_shutdown_watchdog > 0) {
1664 /* If we reboot let's set the shutdown
1665 * watchdog and tell the shutdown binary to
1666 * repeatedly ping it */
1667 watchdog_set_timeout(&arg_shutdown_watchdog);
1668 watchdog_close(false);
1670 /* Tell the binary how often to ping */
1671 snprintf(e, sizeof(e), "WATCHDOG_USEC=%llu", (unsigned long long) arg_shutdown_watchdog);
1675 watchdog_close(true);
1677 execve(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line, (char**) env_block);
1678 log_error("Failed to execute shutdown binary, freezing: %m");