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 "machine-id-setup.h"
45 #include "load-fragment.h"
48 #include "conf-parser.h"
49 #include "bus-errors.h"
60 ACTION_DUMP_CONFIGURATION_ITEMS,
62 } arg_action = ACTION_RUN;
64 static char *arg_default_unit = NULL;
65 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
67 static bool arg_dump_core = true;
68 static bool arg_crash_shell = false;
69 static int arg_crash_chvt = -1;
70 static bool arg_confirm_spawn = false;
71 static bool arg_show_status = true;
72 #ifdef HAVE_SYSV_COMPAT
73 static bool arg_sysv_console = true;
75 static bool arg_mount_auto = true;
76 static bool arg_swap_auto = true;
77 static char **arg_default_controllers = NULL;
78 static char ***arg_join_controllers = NULL;
79 static ExecOutput arg_default_std_output = EXEC_OUTPUT_SYSLOG;
80 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
82 static FILE* serialization = NULL;
84 static void nop_handler(int sig) {
87 _noreturn_ static void crash(int sig) {
90 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
95 /* We want to wait for the core process, hence let's enable SIGCHLD */
97 sa.sa_handler = nop_handler;
98 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
99 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
101 if ((pid = fork()) < 0)
102 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
107 /* Enable default signal handler for core dump */
109 sa.sa_handler = SIG_DFL;
110 assert_se(sigaction(sig, &sa, NULL) == 0);
112 /* Don't limit the core dump size */
114 rl.rlim_cur = RLIM_INFINITY;
115 rl.rlim_max = RLIM_INFINITY;
116 setrlimit(RLIMIT_CORE, &rl);
118 /* Just to be sure... */
119 assert_se(chdir("/") == 0);
121 /* Raise the signal again */
124 assert_not_reached("We shouldn't be here...");
131 /* Order things nicely. */
132 if ((r = wait_for_terminate(pid, &status)) < 0)
133 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
134 else if (status.si_code != CLD_DUMPED)
135 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
137 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
142 chvt(arg_crash_chvt);
144 if (arg_crash_shell) {
148 log_info("Executing crash shell in 10s...");
151 /* Let the kernel reap children for us */
153 sa.sa_handler = SIG_IGN;
154 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
155 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
157 if ((pid = fork()) < 0)
158 log_error("Failed to fork off crash shell: %s", strerror(errno));
162 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
163 log_error("Failed to acquire terminal: %s", strerror(-fd));
164 else if ((r = make_stdio(fd)) < 0)
165 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
167 execl("/bin/sh", "/bin/sh", NULL);
169 log_error("execl() failed: %s", strerror(errno));
173 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
176 log_info("Freezing execution.");
180 static void install_crash_handler(void) {
185 sa.sa_handler = crash;
186 sa.sa_flags = SA_NODEFER;
188 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
191 static int console_setup(bool do_reset) {
194 /* If we are init, we connect stdin/stdout/stderr to /dev/null
195 * and make sure we don't have a controlling tty. */
202 if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
203 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
207 if ((r = reset_terminal_fd(tty_fd)) < 0)
208 log_error("Failed to reset /dev/console: %s", strerror(-r));
210 close_nointr_nofail(tty_fd);
214 static int set_default_unit(const char *u) {
219 if (!(c = strdup(u)))
222 free(arg_default_unit);
223 arg_default_unit = c;
227 static int parse_proc_cmdline_word(const char *word) {
229 static const char * const rlmap[] = {
230 "emergency", SPECIAL_EMERGENCY_TARGET,
231 "-b", SPECIAL_EMERGENCY_TARGET,
232 "single", SPECIAL_RESCUE_TARGET,
233 "-s", SPECIAL_RESCUE_TARGET,
234 "s", SPECIAL_RESCUE_TARGET,
235 "S", SPECIAL_RESCUE_TARGET,
236 "1", SPECIAL_RESCUE_TARGET,
237 "2", SPECIAL_RUNLEVEL2_TARGET,
238 "3", SPECIAL_RUNLEVEL3_TARGET,
239 "4", SPECIAL_RUNLEVEL4_TARGET,
240 "5", SPECIAL_RUNLEVEL5_TARGET,
245 if (startswith(word, "systemd.unit="))
246 return set_default_unit(word + 13);
248 else if (startswith(word, "systemd.log_target=")) {
250 if (log_set_target_from_string(word + 19) < 0)
251 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
253 } else if (startswith(word, "systemd.log_level=")) {
255 if (log_set_max_level_from_string(word + 18) < 0)
256 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
258 } else if (startswith(word, "systemd.log_color=")) {
260 if (log_show_color_from_string(word + 18) < 0)
261 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
263 } else if (startswith(word, "systemd.log_location=")) {
265 if (log_show_location_from_string(word + 21) < 0)
266 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
268 } else if (startswith(word, "systemd.dump_core=")) {
271 if ((r = parse_boolean(word + 18)) < 0)
272 log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
276 } else if (startswith(word, "systemd.crash_shell=")) {
279 if ((r = parse_boolean(word + 20)) < 0)
280 log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
284 } else if (startswith(word, "systemd.confirm_spawn=")) {
287 if ((r = parse_boolean(word + 22)) < 0)
288 log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
290 arg_confirm_spawn = r;
292 } else if (startswith(word, "systemd.crash_chvt=")) {
295 if (safe_atoi(word + 19, &k) < 0)
296 log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
300 } else if (startswith(word, "systemd.show_status=")) {
303 if ((r = parse_boolean(word + 20)) < 0)
304 log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
307 } else if (startswith(word, "systemd.default_standard_output=")) {
310 if ((r = exec_output_from_string(word + 32)) < 0)
311 log_warning("Failed to parse default standard output switch %s, Ignoring.", word + 32);
313 arg_default_std_output = r;
314 } else if (startswith(word, "systemd.default_standard_error=")) {
317 if ((r = exec_output_from_string(word + 31)) < 0)
318 log_warning("Failed to parse default standard error switch %s, Ignoring.", word + 31);
320 arg_default_std_error = r;
321 #ifdef HAVE_SYSV_COMPAT
322 } else if (startswith(word, "systemd.sysv_console=")) {
325 if ((r = parse_boolean(word + 21)) < 0)
326 log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
328 arg_sysv_console = r;
331 } else if (startswith(word, "systemd.")) {
333 log_warning("Unknown kernel switch %s. Ignoring.", word);
335 log_info("Supported kernel switches:\n"
336 "systemd.unit=UNIT Default unit to start\n"
337 "systemd.dump_core=0|1 Dump core on crash\n"
338 "systemd.crash_shell=0|1 Run shell on crash\n"
339 "systemd.crash_chvt=N Change to VT #N on crash\n"
340 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
341 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
342 #ifdef HAVE_SYSV_COMPAT
343 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
345 "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
347 "systemd.log_level=LEVEL Log level\n"
348 "systemd.log_color=0|1 Highlight important log messages\n"
349 "systemd.log_location=0|1 Include code location in log messages\n"
350 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
351 " Set default log output for services\n"
352 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
353 " Set default log error output for services\n");
355 } else if (streq(word, "quiet")) {
356 arg_show_status = false;
357 #ifdef HAVE_SYSV_COMPAT
358 arg_sysv_console = false;
363 /* SysV compatibility */
364 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
365 if (streq(word, rlmap[i]))
366 return set_default_unit(rlmap[i+1]);
372 static int config_parse_level2(
373 const char *filename,
386 log_set_max_level_from_string(rvalue);
390 static int config_parse_target(
391 const char *filename,
404 log_set_target_from_string(rvalue);
408 static int config_parse_color(
409 const char *filename,
422 log_show_color_from_string(rvalue);
426 static int config_parse_location(
427 const char *filename,
440 log_show_location_from_string(rvalue);
444 static int config_parse_cpu_affinity2(
445 const char *filename,
464 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
469 if (!(t = strndup(w, l)))
472 r = safe_atou(t, &cpu);
476 if (!(c = cpu_set_malloc(&ncpus)))
479 if (r < 0 || cpu >= ncpus) {
480 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
485 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
489 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
490 log_warning("Failed to set CPU affinity: %m");
498 static void strv_free_free(char ***l) {
510 static void free_join_controllers(void) {
511 if (!arg_join_controllers)
514 strv_free_free(arg_join_controllers);
515 arg_join_controllers = NULL;
518 static int config_parse_join_controllers(
519 const char *filename,
536 free_join_controllers();
538 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
541 s = strndup(w, length);
545 l = strv_split(s, ",");
550 if (strv_length(l) <= 1) {
555 if (!arg_join_controllers) {
556 arg_join_controllers = new(char**, 2);
557 if (!arg_join_controllers) {
562 arg_join_controllers[0] = l;
563 arg_join_controllers[1] = NULL;
570 t = new0(char**, n+2);
578 for (a = arg_join_controllers; *a; a++) {
580 if (strv_overlap(*a, l)) {
583 c = strv_merge(*a, l);
606 t[n++] = strv_uniq(l);
608 strv_free_free(arg_join_controllers);
609 arg_join_controllers = t;
616 static int parse_config_file(void) {
618 const ConfigTableItem items[] = {
619 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
620 { "Manager", "LogTarget", config_parse_target, 0, NULL },
621 { "Manager", "LogColor", config_parse_color, 0, NULL },
622 { "Manager", "LogLocation", config_parse_location, 0, NULL },
623 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
624 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
625 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
626 #ifdef HAVE_SYSV_COMPAT
627 { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console },
629 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
630 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
631 { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto },
632 { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto },
633 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
634 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
635 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
636 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
637 { NULL, NULL, NULL, 0, NULL }
644 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
650 log_warning("Failed to open configuration file '%s': %m", fn);
654 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
656 log_warning("Failed to parse configuration file: %s", strerror(-r));
663 static int parse_proc_cmdline(void) {
664 char *line, *w, *state;
668 /* Don't read /proc/cmdline if we are in a container, since
669 * that is only relevant for the host system */
670 if (detect_container(NULL) > 0)
673 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
674 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
678 FOREACH_WORD_QUOTED(w, l, line, state) {
681 if (!(word = strndup(w, l))) {
686 r = parse_proc_cmdline_word(word);
700 static int parse_argv(int argc, char *argv[]) {
703 ARG_LOG_LEVEL = 0x100,
711 ARG_DUMP_CONFIGURATION_ITEMS,
719 ARG_DEFAULT_STD_OUTPUT,
720 ARG_DEFAULT_STD_ERROR
723 static const struct option options[] = {
724 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
725 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
726 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
727 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
728 { "unit", required_argument, NULL, ARG_UNIT },
729 { "system", no_argument, NULL, ARG_SYSTEM },
730 { "user", no_argument, NULL, ARG_USER },
731 { "test", no_argument, NULL, ARG_TEST },
732 { "help", no_argument, NULL, 'h' },
733 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
734 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
735 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
736 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
737 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
738 #ifdef HAVE_SYSV_COMPAT
739 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
741 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
742 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
743 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
744 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
756 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
761 if ((r = log_set_max_level_from_string(optarg)) < 0) {
762 log_error("Failed to parse log level %s.", optarg);
770 if ((r = log_set_target_from_string(optarg)) < 0) {
771 log_error("Failed to parse log target %s.", optarg);
780 if ((r = log_show_color_from_string(optarg)) < 0) {
781 log_error("Failed to parse log color setting %s.", optarg);
785 log_show_color(true);
789 case ARG_LOG_LOCATION:
792 if ((r = log_show_location_from_string(optarg)) < 0) {
793 log_error("Failed to parse log location setting %s.", optarg);
797 log_show_location(true);
801 case ARG_DEFAULT_STD_OUTPUT:
803 if ((r = exec_output_from_string(optarg)) < 0) {
804 log_error("Failed to parse default standard output setting %s.", optarg);
807 arg_default_std_output = r;
810 case ARG_DEFAULT_STD_ERROR:
812 if ((r = exec_output_from_string(optarg)) < 0) {
813 log_error("Failed to parse default standard error output setting %s.", optarg);
816 arg_default_std_error = r;
821 if ((r = set_default_unit(optarg)) < 0) {
822 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
829 arg_running_as = MANAGER_SYSTEM;
833 arg_running_as = MANAGER_USER;
837 arg_action = ACTION_TEST;
840 case ARG_DUMP_CONFIGURATION_ITEMS:
841 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
845 arg_dump_core = true;
848 case ARG_CRASH_SHELL:
849 arg_crash_shell = true;
852 case ARG_CONFIRM_SPAWN:
853 arg_confirm_spawn = true;
856 case ARG_SHOW_STATUS:
859 if ((r = parse_boolean(optarg)) < 0) {
860 log_error("Failed to show status boolean %s.", optarg);
865 arg_show_status = true;
867 #ifdef HAVE_SYSV_COMPAT
868 case ARG_SYSV_CONSOLE:
871 if ((r = parse_boolean(optarg)) < 0) {
872 log_error("Failed to SysV console boolean %s.", optarg);
875 arg_sysv_console = r;
877 arg_sysv_console = true;
881 case ARG_DESERIALIZE: {
885 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
886 log_error("Failed to parse deserialize option %s.", optarg);
890 if (!(f = fdopen(fd, "r"))) {
891 log_error("Failed to open serialization fd: %m");
896 fclose(serialization);
903 case ARG_INTROSPECT: {
904 const char * const * i = NULL;
906 for (i = bus_interface_table; *i; i += 2)
907 if (!optarg || streq(i[0], optarg)) {
908 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
911 fputs("</node>\n", stdout);
918 log_error("Unknown interface %s.", optarg);
920 arg_action = ACTION_DONE;
925 arg_action = ACTION_HELP;
929 log_set_max_level(LOG_DEBUG);
935 /* Just to eat away the sysvinit kernel
936 * cmdline args without getopt() error
937 * messages that we'll parse in
938 * parse_proc_cmdline_word() or ignore. */
943 log_error("Unknown option code %c", c);
950 if (optind < argc && getpid() != 1) {
951 /* Hmm, when we aren't run as init system
952 * let's complain about excess arguments */
954 log_error("Excess arguments.");
958 if (detect_container(NULL) > 0) {
961 /* All /proc/cmdline arguments the kernel didn't
962 * understand it passed to us. We're not really
963 * interested in that usually since /proc/cmdline is
964 * more interesting and complete. With one exception:
965 * if we are run in a container /proc/cmdline is not
966 * relevant for the container, hence we rely on argv[]
969 for (a = argv; a < argv + argc; a++)
970 if ((r = parse_proc_cmdline_word(*a)) < 0)
977 static int help(void) {
979 printf("%s [OPTIONS...]\n\n"
980 "Starts up and maintains the system or user services.\n\n"
981 " -h --help Show this help\n"
982 " --test Determine startup sequence, dump it and exit\n"
983 " --dump-configuration-items Dump understood unit configuration items\n"
984 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
985 " --unit=UNIT Set default unit\n"
986 " --system Run a system instance, even if PID != 1\n"
987 " --user Run a user instance\n"
988 " --dump-core Dump core on crash\n"
989 " --crash-shell Run shell on crash\n"
990 " --confirm-spawn Ask for confirmation when spawning processes\n"
991 " --show-status[=0|1] Show status updates on the console during bootup\n"
992 #ifdef HAVE_SYSV_COMPAT
993 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
995 " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
996 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
997 " --log-color[=0|1] Highlight important log messages\n"
998 " --log-location[=0|1] Include code location in log messages\n"
999 " --default-standard-output= Set default standard output for services\n"
1000 " --default-standard-error= Set default standard error output for services\n",
1001 program_invocation_short_name);
1006 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1015 /* Make sure nothing is really destructed when we shut down */
1018 if ((r = manager_open_serialization(m, &f)) < 0) {
1019 log_error("Failed to create serialization file: %s", strerror(-r));
1023 if (!(fds = fdset_new())) {
1025 log_error("Failed to allocate fd set: %s", strerror(-r));
1029 if ((r = manager_serialize(m, f, fds)) < 0) {
1030 log_error("Failed to serialize state: %s", strerror(-r));
1034 if (fseeko(f, 0, SEEK_SET) < 0) {
1035 log_error("Failed to rewind serialization fd: %m");
1039 if ((r = fd_cloexec(fileno(f), false)) < 0) {
1040 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1044 if ((r = fdset_cloexec(fds, false)) < 0) {
1045 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1063 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1065 unsigned long long a, b;
1069 if (!(e = getenv("RD_TIMESTAMP")))
1072 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1075 t->realtime = (usec_t) a;
1076 t->monotonic = (usec_t) b;
1081 static void test_mtab(void) {
1084 /* Check that /etc/mtab is a symlink */
1086 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1089 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1096 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1097 "This is not supported anymore. "
1098 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1101 static void test_usr(void) {
1103 /* Check that /usr is not a separate fs */
1105 if (dir_is_empty("/usr") <= 0)
1108 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1109 "Some things will probably break (sometimes even silently) in mysterious ways. "
1110 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1113 static void test_cgroups(void) {
1115 if (access("/proc/cgroups", F_OK) >= 0)
1118 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1119 "Systems without control groups are not supported. "
1120 "We will now sleep for 10s, and then continue boot-up. "
1121 "Expect breakage and please do not file bugs. "
1122 "Instead fix your kernel and enable CONFIG_CGROUPS." );
1127 int main(int argc, char *argv[]) {
1129 int r, retval = EXIT_FAILURE;
1130 usec_t before_startup, after_startup;
1131 char timespan[FORMAT_TIMESPAN_MAX];
1133 bool reexecute = false;
1134 const char *shutdown_verb = NULL;
1135 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1136 char systemd[] = "systemd";
1137 bool is_reexec = false;
1139 bool loaded_policy = false;
1141 #ifdef HAVE_SYSV_COMPAT
1142 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1143 /* This is compatibility support for SysV, where
1144 * calling init as a user is identical to telinit. */
1147 execv(SYSTEMCTL_BINARY_PATH, argv);
1148 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1153 /* Determine if this is a reexecution or normal bootup. We do
1154 * the full command line parsing much later, so let's just
1155 * have a quick peek here. */
1157 for (j = 1; j < argc; j++)
1158 if (streq(argv[j], "--deserialize")) {
1163 /* If we get started via the /sbin/init symlink then we are
1164 called 'init'. After a subsequent reexecution we are then
1165 called 'systemd'. That is confusing, hence let's call us
1166 systemd right-away. */
1168 program_invocation_short_name = systemd;
1169 prctl(PR_SET_NAME, systemd);
1173 log_show_color(isatty(STDERR_FILENO) > 0);
1174 log_show_location(false);
1175 log_set_max_level(LOG_INFO);
1177 if (getpid() == 1) {
1178 arg_running_as = MANAGER_SYSTEM;
1179 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_SYSLOG_OR_KMSG);
1182 if (selinux_setup(&loaded_policy) < 0)
1187 if (label_init() < 0)
1191 if (hwclock_is_localtime() > 0) {
1194 r = hwclock_apply_localtime_delta(&min);
1196 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1198 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1202 arg_running_as = MANAGER_USER;
1203 log_set_target(LOG_TARGET_AUTO);
1207 /* Initialize default unit */
1208 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1211 /* By default, mount "cpu" and "cpuacct" together */
1212 arg_join_controllers = new(char**, 2);
1213 if (!arg_join_controllers)
1216 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1217 arg_join_controllers[1] = NULL;
1219 if (!arg_join_controllers[0])
1222 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1223 * /proc/$PID/fd is available. */
1224 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1225 r = mount_setup(loaded_policy);
1230 /* Reset all signal handlers. */
1231 assert_se(reset_all_signal_handlers() == 0);
1233 /* If we are init, we can block sigkill. Yay. */
1234 ignore_signals(SIGNALS_IGNORE, -1);
1236 if (parse_config_file() < 0)
1239 if (arg_running_as == MANAGER_SYSTEM)
1240 if (parse_proc_cmdline() < 0)
1243 log_parse_environment();
1245 if (parse_argv(argc, argv) < 0)
1248 if (arg_action == ACTION_TEST && geteuid() == 0) {
1249 log_error("Don't run test mode as root.");
1253 if (arg_running_as == MANAGER_SYSTEM &&
1254 arg_action == ACTION_RUN &&
1255 running_in_chroot() > 0) {
1256 log_error("Cannot be run in a chroot() environment.");
1260 if (arg_action == ACTION_HELP) {
1263 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1264 unit_dump_config_items(stdout);
1265 retval = EXIT_SUCCESS;
1267 } else if (arg_action == ACTION_DONE) {
1268 retval = EXIT_SUCCESS;
1272 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1274 /* Close logging fds, in order not to confuse fdset below */
1277 /* Remember open file descriptors for later deserialization */
1278 if (serialization) {
1279 if ((r = fdset_new_fill(&fds)) < 0) {
1280 log_error("Failed to allocate fd set: %s", strerror(-r));
1284 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1286 close_all_fds(NULL, 0);
1288 /* Set up PATH unless it is already set */
1290 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1291 arg_running_as == MANAGER_SYSTEM);
1293 if (arg_running_as == MANAGER_SYSTEM) {
1294 /* Parse the data passed to us by the initrd and unset it */
1295 parse_initrd_timestamp(&initrd_timestamp);
1296 filter_environ("RD_");
1298 /* Unset some environment variables passed in from the
1299 * kernel that don't really make sense for us. */
1303 /* All other variables are left as is, so that clients
1304 * can still read them via /proc/1/environ */
1307 /* Move out of the way, so that we won't block unmounts */
1308 assert_se(chdir("/") == 0);
1310 if (arg_running_as == MANAGER_SYSTEM) {
1311 /* Become a session leader if we aren't one yet. */
1314 /* Disable the umask logic */
1318 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1319 dbus_connection_set_change_sigpipe(FALSE);
1321 /* Reset the console, but only if this is really init and we
1322 * are freshly booted */
1323 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1324 console_setup(getpid() == 1 && !is_reexec);
1328 /* Open the logging devices, if possible and necessary */
1331 /* Make sure we leave a core dump without panicing the
1334 install_crash_handler();
1336 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1337 r = mount_cgroup_controllers(arg_join_controllers);
1342 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1343 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1345 if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1348 if (arg_show_status || plymouth_running())
1361 if ((r = manager_new(arg_running_as, &m)) < 0) {
1362 log_error("Failed to allocate manager object: %s", strerror(-r));
1366 m->confirm_spawn = arg_confirm_spawn;
1367 #ifdef HAVE_SYSV_COMPAT
1368 m->sysv_console = arg_sysv_console;
1370 m->mount_auto = arg_mount_auto;
1371 m->swap_auto = arg_swap_auto;
1372 m->default_std_output = arg_default_std_output;
1373 m->default_std_error = arg_default_std_error;
1375 if (dual_timestamp_is_set(&initrd_timestamp))
1376 m->initrd_timestamp = initrd_timestamp;
1378 if (arg_default_controllers)
1379 manager_set_default_controllers(m, arg_default_controllers);
1381 manager_set_show_status(m, arg_show_status);
1383 before_startup = now(CLOCK_MONOTONIC);
1385 if ((r = manager_startup(m, serialization, fds)) < 0)
1386 log_error("Failed to fully start up daemon: %s", strerror(-r));
1389 /* This will close all file descriptors that were opened, but
1390 * not claimed by any unit. */
1396 if (serialization) {
1397 fclose(serialization);
1398 serialization = NULL;
1401 Unit *target = NULL;
1403 dbus_error_init(&error);
1405 log_debug("Activating default unit: %s", arg_default_unit);
1407 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1408 log_error("Failed to load default target: %s", bus_error(&error, r));
1409 dbus_error_free(&error);
1410 } else if (target->meta.load_state == UNIT_ERROR)
1411 log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1412 else if (target->meta.load_state == UNIT_MASKED)
1413 log_error("Default target masked.");
1415 if (!target || target->meta.load_state != UNIT_LOADED) {
1416 log_info("Trying to load rescue target...");
1418 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1419 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1420 dbus_error_free(&error);
1422 } else if (target->meta.load_state == UNIT_ERROR) {
1423 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1425 } else if (target->meta.load_state == UNIT_MASKED) {
1426 log_error("Rescue target masked.");
1431 assert(target->meta.load_state == UNIT_LOADED);
1433 if (arg_action == ACTION_TEST) {
1434 printf("-> By units:\n");
1435 manager_dump_units(m, stdout, "\t");
1438 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1439 log_error("Failed to start default target: %s", bus_error(&error, r));
1440 dbus_error_free(&error);
1444 after_startup = now(CLOCK_MONOTONIC);
1445 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1446 "Loaded units and determined initial transaction in %s.",
1447 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1449 if (arg_action == ACTION_TEST) {
1450 printf("-> By jobs:\n");
1451 manager_dump_jobs(m, stdout, "\t");
1452 retval = EXIT_SUCCESS;
1458 if ((r = manager_loop(m)) < 0) {
1459 log_error("Failed to run mainloop: %s", strerror(-r));
1463 switch (m->exit_code) {
1466 retval = EXIT_SUCCESS;
1470 case MANAGER_RELOAD:
1471 log_info("Reloading.");
1472 if ((r = manager_reload(m)) < 0)
1473 log_error("Failed to reload: %s", strerror(-r));
1476 case MANAGER_REEXECUTE:
1477 if (prepare_reexecute(m, &serialization, &fds) < 0)
1481 log_notice("Reexecuting.");
1484 case MANAGER_REBOOT:
1485 case MANAGER_POWEROFF:
1487 case MANAGER_KEXEC: {
1488 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1489 [MANAGER_REBOOT] = "reboot",
1490 [MANAGER_POWEROFF] = "poweroff",
1491 [MANAGER_HALT] = "halt",
1492 [MANAGER_KEXEC] = "kexec"
1495 assert_se(shutdown_verb = table[m->exit_code]);
1497 log_notice("Shutting down.");
1502 assert_not_reached("Unknown exit code.");
1510 free(arg_default_unit);
1511 strv_free(arg_default_controllers);
1512 free_join_controllers();
1519 const char *args[15];
1523 assert(serialization);
1526 args[i++] = SYSTEMD_BINARY_PATH;
1528 args[i++] = "--log-level";
1529 args[i++] = log_level_to_string(log_get_max_level());
1531 args[i++] = "--log-target";
1532 args[i++] = log_target_to_string(log_get_target());
1534 if (arg_running_as == MANAGER_SYSTEM)
1535 args[i++] = "--system";
1537 args[i++] = "--user";
1540 args[i++] = "--dump-core";
1542 if (arg_crash_shell)
1543 args[i++] = "--crash-shell";
1545 if (arg_confirm_spawn)
1546 args[i++] = "--confirm-spawn";
1548 if (arg_show_status)
1549 args[i++] = "--show-status=1";
1551 args[i++] = "--show-status=0";
1553 #ifdef HAVE_SYSV_COMPAT
1554 if (arg_sysv_console)
1555 args[i++] = "--sysv-console=1";
1557 args[i++] = "--sysv-console=0";
1560 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1563 args[i++] = "--deserialize";
1568 assert(i <= ELEMENTSOF(args));
1570 execv(args[0], (char* const*) args);
1572 log_error("Failed to reexecute: %m");
1576 fclose(serialization);
1581 if (shutdown_verb) {
1582 const char * command_line[] = {
1583 SYSTEMD_SHUTDOWN_BINARY_PATH,
1588 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1589 log_error("Failed to execute shutdown binary, freezing: %m");