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"
61 ACTION_DUMP_CONFIGURATION_ITEMS,
63 } arg_action = ACTION_RUN;
65 static char *arg_default_unit = NULL;
66 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
68 static bool arg_dump_core = true;
69 static bool arg_crash_shell = false;
70 static int arg_crash_chvt = -1;
71 static bool arg_confirm_spawn = false;
72 static bool arg_show_status = true;
73 #ifdef HAVE_SYSV_COMPAT
74 static bool arg_sysv_console = true;
76 static bool arg_mount_auto = true;
77 static bool arg_swap_auto = true;
78 static char **arg_default_controllers = NULL;
79 static char ***arg_join_controllers = NULL;
80 static ExecOutput arg_default_std_output = EXEC_OUTPUT_SYSLOG;
81 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
83 static FILE* serialization = NULL;
85 static void nop_handler(int sig) {
88 _noreturn_ static void crash(int sig) {
91 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
96 /* We want to wait for the core process, hence let's enable SIGCHLD */
98 sa.sa_handler = nop_handler;
99 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
100 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
102 if ((pid = fork()) < 0)
103 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
108 /* Enable default signal handler for core dump */
110 sa.sa_handler = SIG_DFL;
111 assert_se(sigaction(sig, &sa, NULL) == 0);
113 /* Don't limit the core dump size */
115 rl.rlim_cur = RLIM_INFINITY;
116 rl.rlim_max = RLIM_INFINITY;
117 setrlimit(RLIMIT_CORE, &rl);
119 /* Just to be sure... */
120 assert_se(chdir("/") == 0);
122 /* Raise the signal again */
125 assert_not_reached("We shouldn't be here...");
132 /* Order things nicely. */
133 if ((r = wait_for_terminate(pid, &status)) < 0)
134 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
135 else if (status.si_code != CLD_DUMPED)
136 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
138 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
143 chvt(arg_crash_chvt);
145 if (arg_crash_shell) {
149 log_info("Executing crash shell in 10s...");
152 /* Let the kernel reap children for us */
154 sa.sa_handler = SIG_IGN;
155 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
156 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
158 if ((pid = fork()) < 0)
159 log_error("Failed to fork off crash shell: %s", strerror(errno));
163 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
164 log_error("Failed to acquire terminal: %s", strerror(-fd));
165 else if ((r = make_stdio(fd)) < 0)
166 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
168 execl("/bin/sh", "/bin/sh", NULL);
170 log_error("execl() failed: %s", strerror(errno));
174 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
177 log_info("Freezing execution.");
181 static void install_crash_handler(void) {
186 sa.sa_handler = crash;
187 sa.sa_flags = SA_NODEFER;
189 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
192 static int console_setup(bool do_reset) {
195 /* If we are init, we connect stdin/stdout/stderr to /dev/null
196 * and make sure we don't have a controlling tty. */
203 if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
204 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
208 if ((r = reset_terminal_fd(tty_fd)) < 0)
209 log_error("Failed to reset /dev/console: %s", strerror(-r));
211 close_nointr_nofail(tty_fd);
215 static int set_default_unit(const char *u) {
220 if (!(c = strdup(u)))
223 free(arg_default_unit);
224 arg_default_unit = c;
228 static int parse_proc_cmdline_word(const char *word) {
230 static const char * const rlmap[] = {
231 "emergency", SPECIAL_EMERGENCY_TARGET,
232 "-b", SPECIAL_EMERGENCY_TARGET,
233 "single", SPECIAL_RESCUE_TARGET,
234 "-s", SPECIAL_RESCUE_TARGET,
235 "s", SPECIAL_RESCUE_TARGET,
236 "S", SPECIAL_RESCUE_TARGET,
237 "1", SPECIAL_RESCUE_TARGET,
238 "2", SPECIAL_RUNLEVEL2_TARGET,
239 "3", SPECIAL_RUNLEVEL3_TARGET,
240 "4", SPECIAL_RUNLEVEL4_TARGET,
241 "5", SPECIAL_RUNLEVEL5_TARGET,
246 if (startswith(word, "systemd.unit="))
247 return set_default_unit(word + 13);
249 else if (startswith(word, "systemd.log_target=")) {
251 if (log_set_target_from_string(word + 19) < 0)
252 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
254 } else if (startswith(word, "systemd.log_level=")) {
256 if (log_set_max_level_from_string(word + 18) < 0)
257 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
259 } else if (startswith(word, "systemd.log_color=")) {
261 if (log_show_color_from_string(word + 18) < 0)
262 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
264 } else if (startswith(word, "systemd.log_location=")) {
266 if (log_show_location_from_string(word + 21) < 0)
267 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
269 } else if (startswith(word, "systemd.dump_core=")) {
272 if ((r = parse_boolean(word + 18)) < 0)
273 log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
277 } else if (startswith(word, "systemd.crash_shell=")) {
280 if ((r = parse_boolean(word + 20)) < 0)
281 log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
285 } else if (startswith(word, "systemd.confirm_spawn=")) {
288 if ((r = parse_boolean(word + 22)) < 0)
289 log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
291 arg_confirm_spawn = r;
293 } else if (startswith(word, "systemd.crash_chvt=")) {
296 if (safe_atoi(word + 19, &k) < 0)
297 log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
301 } else if (startswith(word, "systemd.show_status=")) {
304 if ((r = parse_boolean(word + 20)) < 0)
305 log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
308 } else if (startswith(word, "systemd.default_standard_output=")) {
311 if ((r = exec_output_from_string(word + 32)) < 0)
312 log_warning("Failed to parse default standard output switch %s, Ignoring.", word + 32);
314 arg_default_std_output = r;
315 } else if (startswith(word, "systemd.default_standard_error=")) {
318 if ((r = exec_output_from_string(word + 31)) < 0)
319 log_warning("Failed to parse default standard error switch %s, Ignoring.", word + 31);
321 arg_default_std_error = r;
322 #ifdef HAVE_SYSV_COMPAT
323 } else if (startswith(word, "systemd.sysv_console=")) {
326 if ((r = parse_boolean(word + 21)) < 0)
327 log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
329 arg_sysv_console = r;
332 } else if (startswith(word, "systemd.")) {
334 log_warning("Unknown kernel switch %s. Ignoring.", word);
336 log_info("Supported kernel switches:\n"
337 "systemd.unit=UNIT Default unit to start\n"
338 "systemd.dump_core=0|1 Dump core on crash\n"
339 "systemd.crash_shell=0|1 Run shell on crash\n"
340 "systemd.crash_chvt=N Change to VT #N on crash\n"
341 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
342 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
343 #ifdef HAVE_SYSV_COMPAT
344 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
346 "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
348 "systemd.log_level=LEVEL Log level\n"
349 "systemd.log_color=0|1 Highlight important log messages\n"
350 "systemd.log_location=0|1 Include code location in log messages\n"
351 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
352 " Set default log output for services\n"
353 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
354 " Set default log error output for services\n");
356 } else if (streq(word, "quiet")) {
357 arg_show_status = false;
358 #ifdef HAVE_SYSV_COMPAT
359 arg_sysv_console = false;
364 /* SysV compatibility */
365 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
366 if (streq(word, rlmap[i]))
367 return set_default_unit(rlmap[i+1]);
373 static int config_parse_level2(
374 const char *filename,
387 log_set_max_level_from_string(rvalue);
391 static int config_parse_target(
392 const char *filename,
405 log_set_target_from_string(rvalue);
409 static int config_parse_color(
410 const char *filename,
423 log_show_color_from_string(rvalue);
427 static int config_parse_location(
428 const char *filename,
441 log_show_location_from_string(rvalue);
445 static int config_parse_cpu_affinity2(
446 const char *filename,
465 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
470 if (!(t = strndup(w, l)))
473 r = safe_atou(t, &cpu);
477 if (!(c = cpu_set_malloc(&ncpus)))
480 if (r < 0 || cpu >= ncpus) {
481 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
486 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
490 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
491 log_warning("Failed to set CPU affinity: %m");
499 static void strv_free_free(char ***l) {
511 static void free_join_controllers(void) {
512 if (!arg_join_controllers)
515 strv_free_free(arg_join_controllers);
516 arg_join_controllers = NULL;
519 static int config_parse_join_controllers(
520 const char *filename,
537 free_join_controllers();
539 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
542 s = strndup(w, length);
546 l = strv_split(s, ",");
551 if (strv_length(l) <= 1) {
556 if (!arg_join_controllers) {
557 arg_join_controllers = new(char**, 2);
558 if (!arg_join_controllers) {
563 arg_join_controllers[0] = l;
564 arg_join_controllers[1] = NULL;
571 t = new0(char**, n+2);
579 for (a = arg_join_controllers; *a; a++) {
581 if (strv_overlap(*a, l)) {
584 c = strv_merge(*a, l);
607 t[n++] = strv_uniq(l);
609 strv_free_free(arg_join_controllers);
610 arg_join_controllers = t;
617 static int parse_config_file(void) {
619 const ConfigTableItem items[] = {
620 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
621 { "Manager", "LogTarget", config_parse_target, 0, NULL },
622 { "Manager", "LogColor", config_parse_color, 0, NULL },
623 { "Manager", "LogLocation", config_parse_location, 0, NULL },
624 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
625 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
626 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
627 #ifdef HAVE_SYSV_COMPAT
628 { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console },
630 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
631 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
632 { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto },
633 { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto },
634 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
635 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
636 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
637 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
638 { NULL, NULL, NULL, 0, NULL }
645 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
651 log_warning("Failed to open configuration file '%s': %m", fn);
655 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
657 log_warning("Failed to parse configuration file: %s", strerror(-r));
664 static int parse_proc_cmdline(void) {
665 char *line, *w, *state;
669 /* Don't read /proc/cmdline if we are in a container, since
670 * that is only relevant for the host system */
671 if (detect_container(NULL) > 0)
674 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
675 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
679 FOREACH_WORD_QUOTED(w, l, line, state) {
682 if (!(word = strndup(w, l))) {
687 r = parse_proc_cmdline_word(word);
701 static int parse_argv(int argc, char *argv[]) {
704 ARG_LOG_LEVEL = 0x100,
712 ARG_DUMP_CONFIGURATION_ITEMS,
720 ARG_DEFAULT_STD_OUTPUT,
721 ARG_DEFAULT_STD_ERROR
724 static const struct option options[] = {
725 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
726 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
727 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
728 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
729 { "unit", required_argument, NULL, ARG_UNIT },
730 { "system", no_argument, NULL, ARG_SYSTEM },
731 { "user", no_argument, NULL, ARG_USER },
732 { "test", no_argument, NULL, ARG_TEST },
733 { "help", no_argument, NULL, 'h' },
734 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
735 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
736 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
737 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
738 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
739 #ifdef HAVE_SYSV_COMPAT
740 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
742 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
743 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
744 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
745 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
757 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
762 if ((r = log_set_max_level_from_string(optarg)) < 0) {
763 log_error("Failed to parse log level %s.", optarg);
771 if ((r = log_set_target_from_string(optarg)) < 0) {
772 log_error("Failed to parse log target %s.", optarg);
781 if ((r = log_show_color_from_string(optarg)) < 0) {
782 log_error("Failed to parse log color setting %s.", optarg);
786 log_show_color(true);
790 case ARG_LOG_LOCATION:
793 if ((r = log_show_location_from_string(optarg)) < 0) {
794 log_error("Failed to parse log location setting %s.", optarg);
798 log_show_location(true);
802 case ARG_DEFAULT_STD_OUTPUT:
804 if ((r = exec_output_from_string(optarg)) < 0) {
805 log_error("Failed to parse default standard output setting %s.", optarg);
808 arg_default_std_output = r;
811 case ARG_DEFAULT_STD_ERROR:
813 if ((r = exec_output_from_string(optarg)) < 0) {
814 log_error("Failed to parse default standard error output setting %s.", optarg);
817 arg_default_std_error = r;
822 if ((r = set_default_unit(optarg)) < 0) {
823 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
830 arg_running_as = MANAGER_SYSTEM;
834 arg_running_as = MANAGER_USER;
838 arg_action = ACTION_TEST;
841 case ARG_DUMP_CONFIGURATION_ITEMS:
842 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
846 arg_dump_core = true;
849 case ARG_CRASH_SHELL:
850 arg_crash_shell = true;
853 case ARG_CONFIRM_SPAWN:
854 arg_confirm_spawn = true;
857 case ARG_SHOW_STATUS:
860 if ((r = parse_boolean(optarg)) < 0) {
861 log_error("Failed to show status boolean %s.", optarg);
866 arg_show_status = true;
868 #ifdef HAVE_SYSV_COMPAT
869 case ARG_SYSV_CONSOLE:
872 if ((r = parse_boolean(optarg)) < 0) {
873 log_error("Failed to SysV console boolean %s.", optarg);
876 arg_sysv_console = r;
878 arg_sysv_console = true;
882 case ARG_DESERIALIZE: {
886 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
887 log_error("Failed to parse deserialize option %s.", optarg);
891 if (!(f = fdopen(fd, "r"))) {
892 log_error("Failed to open serialization fd: %m");
897 fclose(serialization);
904 case ARG_INTROSPECT: {
905 const char * const * i = NULL;
907 for (i = bus_interface_table; *i; i += 2)
908 if (!optarg || streq(i[0], optarg)) {
909 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
912 fputs("</node>\n", stdout);
919 log_error("Unknown interface %s.", optarg);
921 arg_action = ACTION_DONE;
926 arg_action = ACTION_HELP;
930 log_set_max_level(LOG_DEBUG);
936 /* Just to eat away the sysvinit kernel
937 * cmdline args without getopt() error
938 * messages that we'll parse in
939 * parse_proc_cmdline_word() or ignore. */
944 log_error("Unknown option code %c", c);
951 if (optind < argc && getpid() != 1) {
952 /* Hmm, when we aren't run as init system
953 * let's complain about excess arguments */
955 log_error("Excess arguments.");
959 if (detect_container(NULL) > 0) {
962 /* All /proc/cmdline arguments the kernel didn't
963 * understand it passed to us. We're not really
964 * interested in that usually since /proc/cmdline is
965 * more interesting and complete. With one exception:
966 * if we are run in a container /proc/cmdline is not
967 * relevant for the container, hence we rely on argv[]
970 for (a = argv; a < argv + argc; a++)
971 if ((r = parse_proc_cmdline_word(*a)) < 0)
978 static int help(void) {
980 printf("%s [OPTIONS...]\n\n"
981 "Starts up and maintains the system or user services.\n\n"
982 " -h --help Show this help\n"
983 " --test Determine startup sequence, dump it and exit\n"
984 " --dump-configuration-items Dump understood unit configuration items\n"
985 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
986 " --unit=UNIT Set default unit\n"
987 " --system Run a system instance, even if PID != 1\n"
988 " --user Run a user instance\n"
989 " --dump-core Dump core on crash\n"
990 " --crash-shell Run shell on crash\n"
991 " --confirm-spawn Ask for confirmation when spawning processes\n"
992 " --show-status[=0|1] Show status updates on the console during bootup\n"
993 #ifdef HAVE_SYSV_COMPAT
994 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
996 " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
997 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
998 " --log-color[=0|1] Highlight important log messages\n"
999 " --log-location[=0|1] Include code location in log messages\n"
1000 " --default-standard-output= Set default standard output for services\n"
1001 " --default-standard-error= Set default standard error output for services\n",
1002 program_invocation_short_name);
1007 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1016 /* Make sure nothing is really destructed when we shut down */
1019 if ((r = manager_open_serialization(m, &f)) < 0) {
1020 log_error("Failed to create serialization file: %s", strerror(-r));
1024 if (!(fds = fdset_new())) {
1026 log_error("Failed to allocate fd set: %s", strerror(-r));
1030 if ((r = manager_serialize(m, f, fds)) < 0) {
1031 log_error("Failed to serialize state: %s", strerror(-r));
1035 if (fseeko(f, 0, SEEK_SET) < 0) {
1036 log_error("Failed to rewind serialization fd: %m");
1040 if ((r = fd_cloexec(fileno(f), false)) < 0) {
1041 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1045 if ((r = fdset_cloexec(fds, false)) < 0) {
1046 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1064 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1066 unsigned long long a, b;
1070 if (!(e = getenv("RD_TIMESTAMP")))
1073 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1076 t->realtime = (usec_t) a;
1077 t->monotonic = (usec_t) b;
1082 static void test_mtab(void) {
1085 /* Check that /etc/mtab is a symlink */
1087 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1090 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1097 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1098 "This is not supported anymore. "
1099 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1102 static void test_usr(void) {
1104 /* Check that /usr is not a separate fs */
1106 if (dir_is_empty("/usr") <= 0)
1109 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1110 "Some things will probably break (sometimes even silently) in mysterious ways. "
1111 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1114 static void test_cgroups(void) {
1116 if (access("/proc/cgroups", F_OK) >= 0)
1119 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1120 "Systems without control groups are not supported. "
1121 "We will now sleep for 10s, and then continue boot-up. "
1122 "Expect breakage and please do not file bugs. "
1123 "Instead fix your kernel and enable CONFIG_CGROUPS." );
1128 int main(int argc, char *argv[]) {
1130 int r, retval = EXIT_FAILURE;
1131 usec_t before_startup, after_startup;
1132 char timespan[FORMAT_TIMESPAN_MAX];
1134 bool reexecute = false;
1135 const char *shutdown_verb = NULL;
1136 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1137 char systemd[] = "systemd";
1138 bool is_reexec = false;
1140 bool loaded_policy = false;
1142 #ifdef HAVE_SYSV_COMPAT
1143 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1144 /* This is compatibility support for SysV, where
1145 * calling init as a user is identical to telinit. */
1148 execv(SYSTEMCTL_BINARY_PATH, argv);
1149 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1154 /* Determine if this is a reexecution or normal bootup. We do
1155 * the full command line parsing much later, so let's just
1156 * have a quick peek here. */
1158 for (j = 1; j < argc; j++)
1159 if (streq(argv[j], "--deserialize")) {
1164 /* If we get started via the /sbin/init symlink then we are
1165 called 'init'. After a subsequent reexecution we are then
1166 called 'systemd'. That is confusing, hence let's call us
1167 systemd right-away. */
1169 program_invocation_short_name = systemd;
1170 prctl(PR_SET_NAME, systemd);
1174 log_show_color(isatty(STDERR_FILENO) > 0);
1175 log_show_location(false);
1176 log_set_max_level(LOG_INFO);
1178 if (getpid() == 1) {
1179 arg_running_as = MANAGER_SYSTEM;
1180 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_SYSLOG_OR_KMSG);
1183 if (selinux_setup(&loaded_policy) < 0)
1188 if (label_init() < 0)
1192 if (hwclock_is_localtime() > 0) {
1195 r = hwclock_apply_localtime_delta(&min);
1197 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1199 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1203 arg_running_as = MANAGER_USER;
1204 log_set_target(LOG_TARGET_AUTO);
1208 /* Initialize default unit */
1209 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1212 /* By default, mount "cpu" and "cpuacct" together */
1213 arg_join_controllers = new(char**, 2);
1214 if (!arg_join_controllers)
1217 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1218 arg_join_controllers[1] = NULL;
1220 if (!arg_join_controllers[0])
1223 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1224 * /proc/$PID/fd is available. */
1225 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1226 r = mount_setup(loaded_policy);
1231 /* Reset all signal handlers. */
1232 assert_se(reset_all_signal_handlers() == 0);
1234 /* If we are init, we can block sigkill. Yay. */
1235 ignore_signals(SIGNALS_IGNORE, -1);
1237 if (parse_config_file() < 0)
1240 if (arg_running_as == MANAGER_SYSTEM)
1241 if (parse_proc_cmdline() < 0)
1244 log_parse_environment();
1246 if (parse_argv(argc, argv) < 0)
1249 if (arg_action == ACTION_TEST && geteuid() == 0) {
1250 log_error("Don't run test mode as root.");
1254 if (arg_running_as == MANAGER_SYSTEM &&
1255 arg_action == ACTION_RUN &&
1256 running_in_chroot() > 0) {
1257 log_error("Cannot be run in a chroot() environment.");
1261 if (arg_action == ACTION_HELP) {
1264 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1265 unit_dump_config_items(stdout);
1266 retval = EXIT_SUCCESS;
1268 } else if (arg_action == ACTION_DONE) {
1269 retval = EXIT_SUCCESS;
1273 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1275 /* Close logging fds, in order not to confuse fdset below */
1278 /* Remember open file descriptors for later deserialization */
1279 if (serialization) {
1280 if ((r = fdset_new_fill(&fds)) < 0) {
1281 log_error("Failed to allocate fd set: %s", strerror(-r));
1285 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1287 close_all_fds(NULL, 0);
1289 /* Set up PATH unless it is already set */
1291 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1292 arg_running_as == MANAGER_SYSTEM);
1294 if (arg_running_as == MANAGER_SYSTEM) {
1295 /* Parse the data passed to us by the initrd and unset it */
1296 parse_initrd_timestamp(&initrd_timestamp);
1297 filter_environ("RD_");
1299 /* Unset some environment variables passed in from the
1300 * kernel that don't really make sense for us. */
1304 /* All other variables are left as is, so that clients
1305 * can still read them via /proc/1/environ */
1308 /* Move out of the way, so that we won't block unmounts */
1309 assert_se(chdir("/") == 0);
1311 if (arg_running_as == MANAGER_SYSTEM) {
1312 /* Become a session leader if we aren't one yet. */
1315 /* Disable the umask logic */
1319 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1320 dbus_connection_set_change_sigpipe(FALSE);
1322 /* Reset the console, but only if this is really init and we
1323 * are freshly booted */
1324 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1325 console_setup(getpid() == 1 && !is_reexec);
1329 /* Open the logging devices, if possible and necessary */
1332 /* Make sure we leave a core dump without panicing the
1335 install_crash_handler();
1337 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1338 r = mount_cgroup_controllers(arg_join_controllers);
1343 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1344 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1346 if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1349 if (arg_show_status || plymouth_running())
1362 if ((r = manager_new(arg_running_as, &m)) < 0) {
1363 log_error("Failed to allocate manager object: %s", strerror(-r));
1367 m->confirm_spawn = arg_confirm_spawn;
1368 #ifdef HAVE_SYSV_COMPAT
1369 m->sysv_console = arg_sysv_console;
1371 m->mount_auto = arg_mount_auto;
1372 m->swap_auto = arg_swap_auto;
1373 m->default_std_output = arg_default_std_output;
1374 m->default_std_error = arg_default_std_error;
1376 if (dual_timestamp_is_set(&initrd_timestamp))
1377 m->initrd_timestamp = initrd_timestamp;
1379 if (arg_default_controllers)
1380 manager_set_default_controllers(m, arg_default_controllers);
1382 manager_set_show_status(m, arg_show_status);
1384 before_startup = now(CLOCK_MONOTONIC);
1386 if ((r = manager_startup(m, serialization, fds)) < 0)
1387 log_error("Failed to fully start up daemon: %s", strerror(-r));
1390 /* This will close all file descriptors that were opened, but
1391 * not claimed by any unit. */
1397 if (serialization) {
1398 fclose(serialization);
1399 serialization = NULL;
1402 Unit *target = NULL;
1404 dbus_error_init(&error);
1406 log_debug("Activating default unit: %s", arg_default_unit);
1408 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1409 log_error("Failed to load default target: %s", bus_error(&error, r));
1410 dbus_error_free(&error);
1411 } else if (target->meta.load_state == UNIT_ERROR)
1412 log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1413 else if (target->meta.load_state == UNIT_MASKED)
1414 log_error("Default target masked.");
1416 if (!target || target->meta.load_state != UNIT_LOADED) {
1417 log_info("Trying to load rescue target...");
1419 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1420 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1421 dbus_error_free(&error);
1423 } else if (target->meta.load_state == UNIT_ERROR) {
1424 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1426 } else if (target->meta.load_state == UNIT_MASKED) {
1427 log_error("Rescue target masked.");
1432 assert(target->meta.load_state == UNIT_LOADED);
1434 if (arg_action == ACTION_TEST) {
1435 printf("-> By units:\n");
1436 manager_dump_units(m, stdout, "\t");
1439 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1440 log_error("Failed to start default target: %s", bus_error(&error, r));
1441 dbus_error_free(&error);
1445 after_startup = now(CLOCK_MONOTONIC);
1446 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1447 "Loaded units and determined initial transaction in %s.",
1448 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1450 if (arg_action == ACTION_TEST) {
1451 printf("-> By jobs:\n");
1452 manager_dump_jobs(m, stdout, "\t");
1453 retval = EXIT_SUCCESS;
1459 if ((r = manager_loop(m)) < 0) {
1460 log_error("Failed to run mainloop: %s", strerror(-r));
1464 switch (m->exit_code) {
1467 retval = EXIT_SUCCESS;
1471 case MANAGER_RELOAD:
1472 log_info("Reloading.");
1473 if ((r = manager_reload(m)) < 0)
1474 log_error("Failed to reload: %s", strerror(-r));
1477 case MANAGER_REEXECUTE:
1478 if (prepare_reexecute(m, &serialization, &fds) < 0)
1482 log_notice("Reexecuting.");
1485 case MANAGER_REBOOT:
1486 case MANAGER_POWEROFF:
1488 case MANAGER_KEXEC: {
1489 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1490 [MANAGER_REBOOT] = "reboot",
1491 [MANAGER_POWEROFF] = "poweroff",
1492 [MANAGER_HALT] = "halt",
1493 [MANAGER_KEXEC] = "kexec"
1496 assert_se(shutdown_verb = table[m->exit_code]);
1498 log_notice("Shutting down.");
1503 assert_not_reached("Unknown exit code.");
1511 free(arg_default_unit);
1512 strv_free(arg_default_controllers);
1513 free_join_controllers();
1520 const char *args[15];
1524 assert(serialization);
1527 args[i++] = SYSTEMD_BINARY_PATH;
1529 args[i++] = "--log-level";
1530 args[i++] = log_level_to_string(log_get_max_level());
1532 args[i++] = "--log-target";
1533 args[i++] = log_target_to_string(log_get_target());
1535 if (arg_running_as == MANAGER_SYSTEM)
1536 args[i++] = "--system";
1538 args[i++] = "--user";
1541 args[i++] = "--dump-core";
1543 if (arg_crash_shell)
1544 args[i++] = "--crash-shell";
1546 if (arg_confirm_spawn)
1547 args[i++] = "--confirm-spawn";
1549 if (arg_show_status)
1550 args[i++] = "--show-status=1";
1552 args[i++] = "--show-status=0";
1554 #ifdef HAVE_SYSV_COMPAT
1555 if (arg_sysv_console)
1556 args[i++] = "--sysv-console=1";
1558 args[i++] = "--sysv-console=0";
1561 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1564 args[i++] = "--deserialize";
1569 assert(i <= ELEMENTSOF(args));
1571 execv(args[0], (char* const*) args);
1573 log_error("Failed to reexecute: %m");
1577 fclose(serialization);
1582 if (shutdown_verb) {
1583 const char * command_line[] = {
1584 SYSTEMD_SHUTDOWN_BINARY_PATH,
1589 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1590 log_error("Failed to execute shutdown binary, freezing: %m");