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"
62 ACTION_DUMP_CONFIGURATION_ITEMS,
64 } arg_action = ACTION_RUN;
66 static char *arg_default_unit = NULL;
67 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
69 static bool arg_dump_core = true;
70 static bool arg_crash_shell = false;
71 static int arg_crash_chvt = -1;
72 static bool arg_confirm_spawn = false;
73 static bool arg_show_status = true;
74 #ifdef HAVE_SYSV_COMPAT
75 static bool arg_sysv_console = true;
77 static bool arg_mount_auto = true;
78 static bool arg_swap_auto = true;
79 static char **arg_default_controllers = NULL;
80 static char ***arg_join_controllers = NULL;
81 static ExecOutput arg_default_std_output = EXEC_OUTPUT_JOURNAL;
82 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
84 static FILE* serialization = NULL;
86 static void nop_handler(int sig) {
89 _noreturn_ static void crash(int sig) {
92 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
97 /* We want to wait for the core process, hence let's enable SIGCHLD */
99 sa.sa_handler = nop_handler;
100 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
101 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
103 if ((pid = fork()) < 0)
104 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
109 /* Enable default signal handler for core dump */
111 sa.sa_handler = SIG_DFL;
112 assert_se(sigaction(sig, &sa, NULL) == 0);
114 /* Don't limit the core dump size */
116 rl.rlim_cur = RLIM_INFINITY;
117 rl.rlim_max = RLIM_INFINITY;
118 setrlimit(RLIMIT_CORE, &rl);
120 /* Just to be sure... */
121 assert_se(chdir("/") == 0);
123 /* Raise the signal again */
126 assert_not_reached("We shouldn't be here...");
133 /* Order things nicely. */
134 if ((r = wait_for_terminate(pid, &status)) < 0)
135 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
136 else if (status.si_code != CLD_DUMPED)
137 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
139 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
144 chvt(arg_crash_chvt);
146 if (arg_crash_shell) {
150 log_info("Executing crash shell in 10s...");
153 /* Let the kernel reap children for us */
155 sa.sa_handler = SIG_IGN;
156 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
157 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
159 if ((pid = fork()) < 0)
160 log_error("Failed to fork off crash shell: %s", strerror(errno));
164 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
165 log_error("Failed to acquire terminal: %s", strerror(-fd));
166 else if ((r = make_stdio(fd)) < 0)
167 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
169 execl("/bin/sh", "/bin/sh", NULL);
171 log_error("execl() failed: %s", strerror(errno));
175 log_info("Successfully spawned crash shell as pid %lu.", (unsigned long) pid);
178 log_info("Freezing execution.");
182 static void install_crash_handler(void) {
187 sa.sa_handler = crash;
188 sa.sa_flags = SA_NODEFER;
190 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
193 static int console_setup(bool do_reset) {
196 /* If we are init, we connect stdin/stdout/stderr to /dev/null
197 * and make sure we don't have a controlling tty. */
204 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
206 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
210 /* We don't want to force text mode.
211 * plymouth may be showing pictures already from initrd. */
212 r = reset_terminal_fd(tty_fd, false);
214 log_error("Failed to reset /dev/console: %s", strerror(-r));
216 close_nointr_nofail(tty_fd);
220 static int set_default_unit(const char *u) {
225 if (!(c = strdup(u)))
228 free(arg_default_unit);
229 arg_default_unit = c;
233 static int parse_proc_cmdline_word(const char *word) {
235 static const char * const rlmap[] = {
236 "emergency", SPECIAL_EMERGENCY_TARGET,
237 "-b", SPECIAL_EMERGENCY_TARGET,
238 "single", SPECIAL_RESCUE_TARGET,
239 "-s", SPECIAL_RESCUE_TARGET,
240 "s", SPECIAL_RESCUE_TARGET,
241 "S", SPECIAL_RESCUE_TARGET,
242 "1", SPECIAL_RESCUE_TARGET,
243 "2", SPECIAL_RUNLEVEL2_TARGET,
244 "3", SPECIAL_RUNLEVEL3_TARGET,
245 "4", SPECIAL_RUNLEVEL4_TARGET,
246 "5", SPECIAL_RUNLEVEL5_TARGET,
251 if (startswith(word, "systemd.unit="))
252 return set_default_unit(word + 13);
254 else if (startswith(word, "systemd.log_target=")) {
256 if (log_set_target_from_string(word + 19) < 0)
257 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
259 } else if (startswith(word, "systemd.log_level=")) {
261 if (log_set_max_level_from_string(word + 18) < 0)
262 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
264 } else if (startswith(word, "systemd.log_color=")) {
266 if (log_show_color_from_string(word + 18) < 0)
267 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
269 } else if (startswith(word, "systemd.log_location=")) {
271 if (log_show_location_from_string(word + 21) < 0)
272 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
274 } else if (startswith(word, "systemd.dump_core=")) {
277 if ((r = parse_boolean(word + 18)) < 0)
278 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
282 } else if (startswith(word, "systemd.crash_shell=")) {
285 if ((r = parse_boolean(word + 20)) < 0)
286 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
290 } else if (startswith(word, "systemd.confirm_spawn=")) {
293 if ((r = parse_boolean(word + 22)) < 0)
294 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
296 arg_confirm_spawn = r;
298 } else if (startswith(word, "systemd.crash_chvt=")) {
301 if (safe_atoi(word + 19, &k) < 0)
302 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
306 } else if (startswith(word, "systemd.show_status=")) {
309 if ((r = parse_boolean(word + 20)) < 0)
310 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
313 } else if (startswith(word, "systemd.default_standard_output=")) {
316 if ((r = exec_output_from_string(word + 32)) < 0)
317 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
319 arg_default_std_output = r;
320 } else if (startswith(word, "systemd.default_standard_error=")) {
323 if ((r = exec_output_from_string(word + 31)) < 0)
324 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
326 arg_default_std_error = r;
327 } else if (startswith(word, "systemd.setenv=")) {
331 cenv = strdup(word + 15);
335 eq = strchr(cenv, '=');
339 log_warning("unsetenv failed %s. Ignoring.", strerror(errno));
342 r = setenv(cenv, eq + 1, 1);
344 log_warning("setenv failed %s. Ignoring.", strerror(errno));
347 #ifdef HAVE_SYSV_COMPAT
348 } else if (startswith(word, "systemd.sysv_console=")) {
351 if ((r = parse_boolean(word + 21)) < 0)
352 log_warning("Failed to parse SysV console switch %s. Ignoring.", word + 20);
354 arg_sysv_console = r;
357 } else if (startswith(word, "systemd.")) {
359 log_warning("Unknown kernel switch %s. Ignoring.", word);
361 log_info("Supported kernel switches:\n"
362 "systemd.unit=UNIT Default unit to start\n"
363 "systemd.dump_core=0|1 Dump core on crash\n"
364 "systemd.crash_shell=0|1 Run shell on crash\n"
365 "systemd.crash_chvt=N Change to VT #N on crash\n"
366 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
367 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
368 #ifdef HAVE_SYSV_COMPAT
369 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
371 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
373 "systemd.log_level=LEVEL Log level\n"
374 "systemd.log_color=0|1 Highlight important log messages\n"
375 "systemd.log_location=0|1 Include code location in log messages\n"
376 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
377 " Set default log output for services\n"
378 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
379 " Set default log error output for services\n");
381 } else if (streq(word, "quiet")) {
382 arg_show_status = false;
383 #ifdef HAVE_SYSV_COMPAT
384 arg_sysv_console = false;
389 /* SysV compatibility */
390 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
391 if (streq(word, rlmap[i]))
392 return set_default_unit(rlmap[i+1]);
398 static int config_parse_level2(
399 const char *filename,
412 log_set_max_level_from_string(rvalue);
416 static int config_parse_target(
417 const char *filename,
430 log_set_target_from_string(rvalue);
434 static int config_parse_color(
435 const char *filename,
448 log_show_color_from_string(rvalue);
452 static int config_parse_location(
453 const char *filename,
466 log_show_location_from_string(rvalue);
470 static int config_parse_cpu_affinity2(
471 const char *filename,
490 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
495 if (!(t = strndup(w, l)))
498 r = safe_atou(t, &cpu);
502 if (!(c = cpu_set_malloc(&ncpus)))
505 if (r < 0 || cpu >= ncpus) {
506 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
511 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
515 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
516 log_warning("Failed to set CPU affinity: %m");
524 static void strv_free_free(char ***l) {
536 static void free_join_controllers(void) {
537 if (!arg_join_controllers)
540 strv_free_free(arg_join_controllers);
541 arg_join_controllers = NULL;
544 static int config_parse_join_controllers(
545 const char *filename,
562 free_join_controllers();
564 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
567 s = strndup(w, length);
571 l = strv_split(s, ",");
576 if (strv_length(l) <= 1) {
581 if (!arg_join_controllers) {
582 arg_join_controllers = new(char**, 2);
583 if (!arg_join_controllers) {
588 arg_join_controllers[0] = l;
589 arg_join_controllers[1] = NULL;
596 t = new0(char**, n+2);
604 for (a = arg_join_controllers; *a; a++) {
606 if (strv_overlap(*a, l)) {
609 c = strv_merge(*a, l);
632 t[n++] = strv_uniq(l);
634 strv_free_free(arg_join_controllers);
635 arg_join_controllers = t;
642 static int parse_config_file(void) {
644 const ConfigTableItem items[] = {
645 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
646 { "Manager", "LogTarget", config_parse_target, 0, NULL },
647 { "Manager", "LogColor", config_parse_color, 0, NULL },
648 { "Manager", "LogLocation", config_parse_location, 0, NULL },
649 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
650 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
651 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
652 #ifdef HAVE_SYSV_COMPAT
653 { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console },
655 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
656 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
657 { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto },
658 { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto },
659 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
660 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
661 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
662 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
663 { NULL, NULL, NULL, 0, NULL }
670 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
676 log_warning("Failed to open configuration file '%s': %m", fn);
680 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
682 log_warning("Failed to parse configuration file: %s", strerror(-r));
689 static int parse_proc_cmdline(void) {
690 char *line, *w, *state;
694 /* Don't read /proc/cmdline if we are in a container, since
695 * that is only relevant for the host system */
696 if (detect_container(NULL) > 0)
699 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
700 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
704 FOREACH_WORD_QUOTED(w, l, line, state) {
707 if (!(word = strndup(w, l))) {
712 r = parse_proc_cmdline_word(word);
726 static int parse_argv(int argc, char *argv[]) {
729 ARG_LOG_LEVEL = 0x100,
737 ARG_DUMP_CONFIGURATION_ITEMS,
745 ARG_DEFAULT_STD_OUTPUT,
746 ARG_DEFAULT_STD_ERROR
749 static const struct option options[] = {
750 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
751 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
752 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
753 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
754 { "unit", required_argument, NULL, ARG_UNIT },
755 { "system", no_argument, NULL, ARG_SYSTEM },
756 { "user", no_argument, NULL, ARG_USER },
757 { "test", no_argument, NULL, ARG_TEST },
758 { "help", no_argument, NULL, 'h' },
759 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
760 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
761 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
762 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
763 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
764 #ifdef HAVE_SYSV_COMPAT
765 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
767 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
768 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
769 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
770 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
782 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
787 if ((r = log_set_max_level_from_string(optarg)) < 0) {
788 log_error("Failed to parse log level %s.", optarg);
796 if ((r = log_set_target_from_string(optarg)) < 0) {
797 log_error("Failed to parse log target %s.", optarg);
806 if ((r = log_show_color_from_string(optarg)) < 0) {
807 log_error("Failed to parse log color setting %s.", optarg);
811 log_show_color(true);
815 case ARG_LOG_LOCATION:
818 if ((r = log_show_location_from_string(optarg)) < 0) {
819 log_error("Failed to parse log location setting %s.", optarg);
823 log_show_location(true);
827 case ARG_DEFAULT_STD_OUTPUT:
829 if ((r = exec_output_from_string(optarg)) < 0) {
830 log_error("Failed to parse default standard output setting %s.", optarg);
833 arg_default_std_output = r;
836 case ARG_DEFAULT_STD_ERROR:
838 if ((r = exec_output_from_string(optarg)) < 0) {
839 log_error("Failed to parse default standard error output setting %s.", optarg);
842 arg_default_std_error = r;
847 if ((r = set_default_unit(optarg)) < 0) {
848 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
855 arg_running_as = MANAGER_SYSTEM;
859 arg_running_as = MANAGER_USER;
863 arg_action = ACTION_TEST;
866 case ARG_DUMP_CONFIGURATION_ITEMS:
867 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
871 arg_dump_core = true;
874 case ARG_CRASH_SHELL:
875 arg_crash_shell = true;
878 case ARG_CONFIRM_SPAWN:
879 arg_confirm_spawn = true;
882 case ARG_SHOW_STATUS:
885 if ((r = parse_boolean(optarg)) < 0) {
886 log_error("Failed to show status boolean %s.", optarg);
891 arg_show_status = true;
893 #ifdef HAVE_SYSV_COMPAT
894 case ARG_SYSV_CONSOLE:
897 if ((r = parse_boolean(optarg)) < 0) {
898 log_error("Failed to SysV console boolean %s.", optarg);
901 arg_sysv_console = r;
903 arg_sysv_console = true;
907 case ARG_DESERIALIZE: {
911 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
912 log_error("Failed to parse deserialize option %s.", optarg);
916 if (!(f = fdopen(fd, "r"))) {
917 log_error("Failed to open serialization fd: %m");
922 fclose(serialization);
929 case ARG_INTROSPECT: {
930 const char * const * i = NULL;
932 for (i = bus_interface_table; *i; i += 2)
933 if (!optarg || streq(i[0], optarg)) {
934 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
937 fputs("</node>\n", stdout);
944 log_error("Unknown interface %s.", optarg);
946 arg_action = ACTION_DONE;
951 arg_action = ACTION_HELP;
955 log_set_max_level(LOG_DEBUG);
961 /* Just to eat away the sysvinit kernel
962 * cmdline args without getopt() error
963 * messages that we'll parse in
964 * parse_proc_cmdline_word() or ignore. */
969 log_error("Unknown option code %c", c);
976 if (optind < argc && getpid() != 1) {
977 /* Hmm, when we aren't run as init system
978 * let's complain about excess arguments */
980 log_error("Excess arguments.");
984 if (detect_container(NULL) > 0) {
987 /* All /proc/cmdline arguments the kernel didn't
988 * understand it passed to us. We're not really
989 * interested in that usually since /proc/cmdline is
990 * more interesting and complete. With one exception:
991 * if we are run in a container /proc/cmdline is not
992 * relevant for the container, hence we rely on argv[]
995 for (a = argv; a < argv + argc; a++)
996 if ((r = parse_proc_cmdline_word(*a)) < 0)
1003 static int help(void) {
1005 printf("%s [OPTIONS...]\n\n"
1006 "Starts up and maintains the system or user services.\n\n"
1007 " -h --help Show this help\n"
1008 " --test Determine startup sequence, dump it and exit\n"
1009 " --dump-configuration-items Dump understood unit configuration items\n"
1010 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
1011 " --unit=UNIT Set default unit\n"
1012 " --system Run a system instance, even if PID != 1\n"
1013 " --user Run a user instance\n"
1014 " --dump-core Dump core on crash\n"
1015 " --crash-shell Run shell on crash\n"
1016 " --confirm-spawn Ask for confirmation when spawning processes\n"
1017 " --show-status[=0|1] Show status updates on the console during bootup\n"
1018 #ifdef HAVE_SYSV_COMPAT
1019 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
1021 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1022 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1023 " --log-color[=0|1] Highlight important log messages\n"
1024 " --log-location[=0|1] Include code location in log messages\n"
1025 " --default-standard-output= Set default standard output for services\n"
1026 " --default-standard-error= Set default standard error output for services\n",
1027 program_invocation_short_name);
1032 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1041 /* Make sure nothing is really destructed when we shut down */
1044 if ((r = manager_open_serialization(m, &f)) < 0) {
1045 log_error("Failed to create serialization file: %s", strerror(-r));
1049 if (!(fds = fdset_new())) {
1051 log_error("Failed to allocate fd set: %s", strerror(-r));
1055 if ((r = manager_serialize(m, f, fds)) < 0) {
1056 log_error("Failed to serialize state: %s", strerror(-r));
1060 if (fseeko(f, 0, SEEK_SET) < 0) {
1061 log_error("Failed to rewind serialization fd: %m");
1065 if ((r = fd_cloexec(fileno(f), false)) < 0) {
1066 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1070 if ((r = fdset_cloexec(fds, false)) < 0) {
1071 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1089 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1091 unsigned long long a, b;
1095 if (!(e = getenv("RD_TIMESTAMP")))
1098 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1101 t->realtime = (usec_t) a;
1102 t->monotonic = (usec_t) b;
1107 static void test_mtab(void) {
1110 /* Check that /etc/mtab is a symlink */
1112 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1115 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1122 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1123 "This is not supported anymore. "
1124 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1127 static void test_usr(void) {
1129 /* Check that /usr is not a separate fs */
1131 if (dir_is_empty("/usr") <= 0)
1134 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1135 "Some things will probably break (sometimes even silently) in mysterious ways. "
1136 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1139 static void test_cgroups(void) {
1141 if (access("/proc/cgroups", F_OK) >= 0)
1144 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1145 "Systems without control groups are not supported. "
1146 "We will now sleep for 10s, and then continue boot-up. "
1147 "Expect breakage and please do not file bugs. "
1148 "Instead fix your kernel and enable CONFIG_CGROUPS." );
1153 int main(int argc, char *argv[]) {
1155 int r, retval = EXIT_FAILURE;
1156 usec_t before_startup, after_startup;
1157 char timespan[FORMAT_TIMESPAN_MAX];
1159 bool reexecute = false;
1160 const char *shutdown_verb = NULL;
1161 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1162 static char systemd[] = "systemd";
1163 bool is_reexec = false;
1165 bool loaded_policy = false;
1167 #ifdef HAVE_SYSV_COMPAT
1168 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1169 /* This is compatibility support for SysV, where
1170 * calling init as a user is identical to telinit. */
1173 execv(SYSTEMCTL_BINARY_PATH, argv);
1174 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1179 /* Determine if this is a reexecution or normal bootup. We do
1180 * the full command line parsing much later, so let's just
1181 * have a quick peek here. */
1183 for (j = 1; j < argc; j++)
1184 if (streq(argv[j], "--deserialize")) {
1189 /* If we get started via the /sbin/init symlink then we are
1190 called 'init'. After a subsequent reexecution we are then
1191 called 'systemd'. That is confusing, hence let's call us
1192 systemd right-away. */
1193 program_invocation_short_name = systemd;
1194 prctl(PR_SET_NAME, systemd);
1199 log_show_color(isatty(STDERR_FILENO) > 0);
1200 log_show_location(false);
1201 log_set_max_level(LOG_INFO);
1203 if (getpid() == 1) {
1204 arg_running_as = MANAGER_SYSTEM;
1205 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_JOURNAL_OR_KMSG);
1208 if (selinux_setup(&loaded_policy) < 0)
1210 if (ima_setup() < 0)
1216 if (label_init() < 0)
1220 if (hwclock_is_localtime() > 0) {
1223 r = hwclock_apply_localtime_delta(&min);
1225 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1227 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1231 arg_running_as = MANAGER_USER;
1232 log_set_target(LOG_TARGET_AUTO);
1236 /* Initialize default unit */
1237 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1240 /* By default, mount "cpu" and "cpuacct" together */
1241 arg_join_controllers = new(char**, 2);
1242 if (!arg_join_controllers)
1245 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1246 arg_join_controllers[1] = NULL;
1248 if (!arg_join_controllers[0])
1251 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1252 * /proc/$PID/fd is available. */
1253 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1254 r = mount_setup(loaded_policy);
1259 /* Reset all signal handlers. */
1260 assert_se(reset_all_signal_handlers() == 0);
1262 /* If we are init, we can block sigkill. Yay. */
1263 ignore_signals(SIGNALS_IGNORE, -1);
1265 if (parse_config_file() < 0)
1268 if (arg_running_as == MANAGER_SYSTEM)
1269 if (parse_proc_cmdline() < 0)
1272 log_parse_environment();
1274 if (parse_argv(argc, argv) < 0)
1277 if (arg_action == ACTION_TEST && geteuid() == 0) {
1278 log_error("Don't run test mode as root.");
1282 if (arg_running_as == MANAGER_SYSTEM &&
1283 arg_action == ACTION_RUN &&
1284 running_in_chroot() > 0) {
1285 log_error("Cannot be run in a chroot() environment.");
1289 if (arg_action == ACTION_HELP) {
1292 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1293 unit_dump_config_items(stdout);
1294 retval = EXIT_SUCCESS;
1296 } else if (arg_action == ACTION_DONE) {
1297 retval = EXIT_SUCCESS;
1301 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1303 /* Close logging fds, in order not to confuse fdset below */
1306 /* Remember open file descriptors for later deserialization */
1307 if (serialization) {
1308 if ((r = fdset_new_fill(&fds)) < 0) {
1309 log_error("Failed to allocate fd set: %s", strerror(-r));
1313 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1315 close_all_fds(NULL, 0);
1317 /* Set up PATH unless it is already set */
1319 #ifdef HAVE_SPLIT_USR
1320 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1322 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1324 arg_running_as == MANAGER_SYSTEM);
1326 if (arg_running_as == MANAGER_SYSTEM) {
1327 /* Parse the data passed to us by the initrd and unset it */
1328 parse_initrd_timestamp(&initrd_timestamp);
1329 filter_environ("RD_");
1331 /* Unset some environment variables passed in from the
1332 * kernel that don't really make sense for us. */
1336 /* All other variables are left as is, so that clients
1337 * can still read them via /proc/1/environ */
1340 /* Move out of the way, so that we won't block unmounts */
1341 assert_se(chdir("/") == 0);
1343 if (arg_running_as == MANAGER_SYSTEM) {
1344 /* Become a session leader if we aren't one yet. */
1347 /* Disable the umask logic */
1351 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1352 dbus_connection_set_change_sigpipe(FALSE);
1354 /* Reset the console, but only if this is really init and we
1355 * are freshly booted */
1356 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1357 console_setup(getpid() == 1 && !is_reexec);
1361 /* Open the logging devices, if possible and necessary */
1364 /* Make sure we leave a core dump without panicing the
1367 install_crash_handler();
1369 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1370 r = mount_cgroup_controllers(arg_join_controllers);
1375 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1376 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1378 if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1381 if (arg_show_status || plymouth_running())
1394 if ((r = manager_new(arg_running_as, &m)) < 0) {
1395 log_error("Failed to allocate manager object: %s", strerror(-r));
1399 m->confirm_spawn = arg_confirm_spawn;
1400 #ifdef HAVE_SYSV_COMPAT
1401 m->sysv_console = arg_sysv_console;
1403 m->mount_auto = arg_mount_auto;
1404 m->swap_auto = arg_swap_auto;
1405 m->default_std_output = arg_default_std_output;
1406 m->default_std_error = arg_default_std_error;
1408 if (dual_timestamp_is_set(&initrd_timestamp))
1409 m->initrd_timestamp = initrd_timestamp;
1411 if (arg_default_controllers)
1412 manager_set_default_controllers(m, arg_default_controllers);
1414 manager_set_show_status(m, arg_show_status);
1416 before_startup = now(CLOCK_MONOTONIC);
1418 if ((r = manager_startup(m, serialization, fds)) < 0)
1419 log_error("Failed to fully start up daemon: %s", strerror(-r));
1422 /* This will close all file descriptors that were opened, but
1423 * not claimed by any unit. */
1429 if (serialization) {
1430 fclose(serialization);
1431 serialization = NULL;
1434 Unit *target = NULL;
1435 Job *default_unit_job;
1437 dbus_error_init(&error);
1439 log_debug("Activating default unit: %s", arg_default_unit);
1441 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1442 log_error("Failed to load default target: %s", bus_error(&error, r));
1443 dbus_error_free(&error);
1444 } else if (target->load_state == UNIT_ERROR)
1445 log_error("Failed to load default target: %s", strerror(-target->load_error));
1446 else if (target->load_state == UNIT_MASKED)
1447 log_error("Default target masked.");
1449 if (!target || target->load_state != UNIT_LOADED) {
1450 log_info("Trying to load rescue target...");
1452 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1453 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1454 dbus_error_free(&error);
1456 } else if (target->load_state == UNIT_ERROR) {
1457 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1459 } else if (target->load_state == UNIT_MASKED) {
1460 log_error("Rescue target masked.");
1465 assert(target->load_state == UNIT_LOADED);
1467 if (arg_action == ACTION_TEST) {
1468 printf("-> By units:\n");
1469 manager_dump_units(m, stdout, "\t");
1472 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1474 log_error("Failed to start default target: %s", bus_error(&error, r));
1475 dbus_error_free(&error);
1478 m->default_unit_job_id = default_unit_job->id;
1480 after_startup = now(CLOCK_MONOTONIC);
1481 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1482 "Loaded units and determined initial transaction in %s.",
1483 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1485 if (arg_action == ACTION_TEST) {
1486 printf("-> By jobs:\n");
1487 manager_dump_jobs(m, stdout, "\t");
1488 retval = EXIT_SUCCESS;
1494 if ((r = manager_loop(m)) < 0) {
1495 log_error("Failed to run mainloop: %s", strerror(-r));
1499 switch (m->exit_code) {
1502 retval = EXIT_SUCCESS;
1506 case MANAGER_RELOAD:
1507 log_info("Reloading.");
1508 if ((r = manager_reload(m)) < 0)
1509 log_error("Failed to reload: %s", strerror(-r));
1512 case MANAGER_REEXECUTE:
1513 if (prepare_reexecute(m, &serialization, &fds) < 0)
1517 log_notice("Reexecuting.");
1520 case MANAGER_REBOOT:
1521 case MANAGER_POWEROFF:
1523 case MANAGER_KEXEC: {
1524 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1525 [MANAGER_REBOOT] = "reboot",
1526 [MANAGER_POWEROFF] = "poweroff",
1527 [MANAGER_HALT] = "halt",
1528 [MANAGER_KEXEC] = "kexec"
1531 assert_se(shutdown_verb = table[m->exit_code]);
1533 log_notice("Shutting down.");
1538 assert_not_reached("Unknown exit code.");
1546 free(arg_default_unit);
1547 strv_free(arg_default_controllers);
1548 free_join_controllers();
1555 const char *args[15];
1559 assert(serialization);
1562 args[i++] = SYSTEMD_BINARY_PATH;
1564 args[i++] = "--log-level";
1565 args[i++] = log_level_to_string(log_get_max_level());
1567 args[i++] = "--log-target";
1568 args[i++] = log_target_to_string(log_get_target());
1570 if (arg_running_as == MANAGER_SYSTEM)
1571 args[i++] = "--system";
1573 args[i++] = "--user";
1576 args[i++] = "--dump-core";
1578 if (arg_crash_shell)
1579 args[i++] = "--crash-shell";
1581 if (arg_confirm_spawn)
1582 args[i++] = "--confirm-spawn";
1584 if (arg_show_status)
1585 args[i++] = "--show-status=1";
1587 args[i++] = "--show-status=0";
1589 #ifdef HAVE_SYSV_COMPAT
1590 if (arg_sysv_console)
1591 args[i++] = "--sysv-console=1";
1593 args[i++] = "--sysv-console=0";
1596 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1599 args[i++] = "--deserialize";
1604 assert(i <= ELEMENTSOF(args));
1606 execv(args[0], (char* const*) args);
1608 log_error("Failed to reexecute: %m");
1612 fclose(serialization);
1617 if (shutdown_verb) {
1618 const char * command_line[] = {
1619 SYSTEMD_SHUTDOWN_BINARY_PATH,
1624 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1625 log_error("Failed to execute shutdown binary, freezing: %m");