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_JOURNAL;
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 tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
205 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
209 /* We don't want to force text mode.
210 * plymouth may be showing pictures already from initrd. */
211 r = reset_terminal_fd(tty_fd, false);
213 log_error("Failed to reset /dev/console: %s", strerror(-r));
215 close_nointr_nofail(tty_fd);
219 static int set_default_unit(const char *u) {
224 if (!(c = strdup(u)))
227 free(arg_default_unit);
228 arg_default_unit = c;
232 static int parse_proc_cmdline_word(const char *word) {
234 static const char * const rlmap[] = {
235 "emergency", SPECIAL_EMERGENCY_TARGET,
236 "-b", SPECIAL_EMERGENCY_TARGET,
237 "single", SPECIAL_RESCUE_TARGET,
238 "-s", SPECIAL_RESCUE_TARGET,
239 "s", SPECIAL_RESCUE_TARGET,
240 "S", SPECIAL_RESCUE_TARGET,
241 "1", SPECIAL_RESCUE_TARGET,
242 "2", SPECIAL_RUNLEVEL2_TARGET,
243 "3", SPECIAL_RUNLEVEL3_TARGET,
244 "4", SPECIAL_RUNLEVEL4_TARGET,
245 "5", SPECIAL_RUNLEVEL5_TARGET,
250 if (startswith(word, "systemd.unit="))
251 return set_default_unit(word + 13);
253 else if (startswith(word, "systemd.log_target=")) {
255 if (log_set_target_from_string(word + 19) < 0)
256 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
258 } else if (startswith(word, "systemd.log_level=")) {
260 if (log_set_max_level_from_string(word + 18) < 0)
261 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
263 } else if (startswith(word, "systemd.log_color=")) {
265 if (log_show_color_from_string(word + 18) < 0)
266 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
268 } else if (startswith(word, "systemd.log_location=")) {
270 if (log_show_location_from_string(word + 21) < 0)
271 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
273 } else if (startswith(word, "systemd.dump_core=")) {
276 if ((r = parse_boolean(word + 18)) < 0)
277 log_warning("Failed to parse dump core switch %s. Ignoring.", word + 18);
281 } else if (startswith(word, "systemd.crash_shell=")) {
284 if ((r = parse_boolean(word + 20)) < 0)
285 log_warning("Failed to parse crash shell switch %s. Ignoring.", word + 20);
289 } else if (startswith(word, "systemd.confirm_spawn=")) {
292 if ((r = parse_boolean(word + 22)) < 0)
293 log_warning("Failed to parse confirm spawn switch %s. Ignoring.", word + 22);
295 arg_confirm_spawn = r;
297 } else if (startswith(word, "systemd.crash_chvt=")) {
300 if (safe_atoi(word + 19, &k) < 0)
301 log_warning("Failed to parse crash chvt switch %s. Ignoring.", word + 19);
305 } else if (startswith(word, "systemd.show_status=")) {
308 if ((r = parse_boolean(word + 20)) < 0)
309 log_warning("Failed to parse show status switch %s. Ignoring.", word + 20);
312 } else if (startswith(word, "systemd.default_standard_output=")) {
315 if ((r = exec_output_from_string(word + 32)) < 0)
316 log_warning("Failed to parse default standard output switch %s. Ignoring.", word + 32);
318 arg_default_std_output = r;
319 } else if (startswith(word, "systemd.default_standard_error=")) {
322 if ((r = exec_output_from_string(word + 31)) < 0)
323 log_warning("Failed to parse default standard error switch %s. Ignoring.", word + 31);
325 arg_default_std_error = r;
326 #ifdef HAVE_SYSV_COMPAT
327 } else if (startswith(word, "systemd.sysv_console=")) {
330 if ((r = parse_boolean(word + 21)) < 0)
331 log_warning("Failed to parse SysV console switch %s. Ignoring.", word + 20);
333 arg_sysv_console = r;
336 } else if (startswith(word, "systemd.")) {
338 log_warning("Unknown kernel switch %s. Ignoring.", word);
340 log_info("Supported kernel switches:\n"
341 "systemd.unit=UNIT Default unit to start\n"
342 "systemd.dump_core=0|1 Dump core on crash\n"
343 "systemd.crash_shell=0|1 Run shell on crash\n"
344 "systemd.crash_chvt=N Change to VT #N on crash\n"
345 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
346 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
347 #ifdef HAVE_SYSV_COMPAT
348 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
350 "systemd.log_target=console|kmsg|journal|journal-or-kmsg|syslog|syslog-or-kmsg|null\n"
352 "systemd.log_level=LEVEL Log level\n"
353 "systemd.log_color=0|1 Highlight important log messages\n"
354 "systemd.log_location=0|1 Include code location in log messages\n"
355 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
356 " Set default log output for services\n"
357 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console|journal|journal+console\n"
358 " Set default log error output for services\n");
360 } else if (streq(word, "quiet")) {
361 arg_show_status = false;
362 #ifdef HAVE_SYSV_COMPAT
363 arg_sysv_console = false;
368 /* SysV compatibility */
369 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
370 if (streq(word, rlmap[i]))
371 return set_default_unit(rlmap[i+1]);
377 static int config_parse_level2(
378 const char *filename,
391 log_set_max_level_from_string(rvalue);
395 static int config_parse_target(
396 const char *filename,
409 log_set_target_from_string(rvalue);
413 static int config_parse_color(
414 const char *filename,
427 log_show_color_from_string(rvalue);
431 static int config_parse_location(
432 const char *filename,
445 log_show_location_from_string(rvalue);
449 static int config_parse_cpu_affinity2(
450 const char *filename,
469 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
474 if (!(t = strndup(w, l)))
477 r = safe_atou(t, &cpu);
481 if (!(c = cpu_set_malloc(&ncpus)))
484 if (r < 0 || cpu >= ncpus) {
485 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
490 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
494 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
495 log_warning("Failed to set CPU affinity: %m");
503 static void strv_free_free(char ***l) {
515 static void free_join_controllers(void) {
516 if (!arg_join_controllers)
519 strv_free_free(arg_join_controllers);
520 arg_join_controllers = NULL;
523 static int config_parse_join_controllers(
524 const char *filename,
541 free_join_controllers();
543 FOREACH_WORD_QUOTED(w, length, rvalue, state) {
546 s = strndup(w, length);
550 l = strv_split(s, ",");
555 if (strv_length(l) <= 1) {
560 if (!arg_join_controllers) {
561 arg_join_controllers = new(char**, 2);
562 if (!arg_join_controllers) {
567 arg_join_controllers[0] = l;
568 arg_join_controllers[1] = NULL;
575 t = new0(char**, n+2);
583 for (a = arg_join_controllers; *a; a++) {
585 if (strv_overlap(*a, l)) {
588 c = strv_merge(*a, l);
611 t[n++] = strv_uniq(l);
613 strv_free_free(arg_join_controllers);
614 arg_join_controllers = t;
621 static int parse_config_file(void) {
623 const ConfigTableItem items[] = {
624 { "Manager", "LogLevel", config_parse_level2, 0, NULL },
625 { "Manager", "LogTarget", config_parse_target, 0, NULL },
626 { "Manager", "LogColor", config_parse_color, 0, NULL },
627 { "Manager", "LogLocation", config_parse_location, 0, NULL },
628 { "Manager", "DumpCore", config_parse_bool, 0, &arg_dump_core },
629 { "Manager", "CrashShell", config_parse_bool, 0, &arg_crash_shell },
630 { "Manager", "ShowStatus", config_parse_bool, 0, &arg_show_status },
631 #ifdef HAVE_SYSV_COMPAT
632 { "Manager", "SysVConsole", config_parse_bool, 0, &arg_sysv_console },
634 { "Manager", "CrashChVT", config_parse_int, 0, &arg_crash_chvt },
635 { "Manager", "CPUAffinity", config_parse_cpu_affinity2, 0, NULL },
636 { "Manager", "MountAuto", config_parse_bool, 0, &arg_mount_auto },
637 { "Manager", "SwapAuto", config_parse_bool, 0, &arg_swap_auto },
638 { "Manager", "DefaultControllers", config_parse_strv, 0, &arg_default_controllers },
639 { "Manager", "DefaultStandardOutput", config_parse_output, 0, &arg_default_std_output },
640 { "Manager", "DefaultStandardError", config_parse_output, 0, &arg_default_std_error },
641 { "Manager", "JoinControllers", config_parse_join_controllers, 0, &arg_join_controllers },
642 { NULL, NULL, NULL, 0, NULL }
649 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
655 log_warning("Failed to open configuration file '%s': %m", fn);
659 r = config_parse(fn, f, "Manager\0", config_item_table_lookup, (void*) items, false, NULL);
661 log_warning("Failed to parse configuration file: %s", strerror(-r));
668 static int parse_proc_cmdline(void) {
669 char *line, *w, *state;
673 /* Don't read /proc/cmdline if we are in a container, since
674 * that is only relevant for the host system */
675 if (detect_container(NULL) > 0)
678 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
679 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
683 FOREACH_WORD_QUOTED(w, l, line, state) {
686 if (!(word = strndup(w, l))) {
691 r = parse_proc_cmdline_word(word);
705 static int parse_argv(int argc, char *argv[]) {
708 ARG_LOG_LEVEL = 0x100,
716 ARG_DUMP_CONFIGURATION_ITEMS,
724 ARG_DEFAULT_STD_OUTPUT,
725 ARG_DEFAULT_STD_ERROR
728 static const struct option options[] = {
729 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
730 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
731 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
732 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
733 { "unit", required_argument, NULL, ARG_UNIT },
734 { "system", no_argument, NULL, ARG_SYSTEM },
735 { "user", no_argument, NULL, ARG_USER },
736 { "test", no_argument, NULL, ARG_TEST },
737 { "help", no_argument, NULL, 'h' },
738 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
739 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
740 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
741 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
742 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
743 #ifdef HAVE_SYSV_COMPAT
744 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
746 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
747 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
748 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
749 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
761 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
766 if ((r = log_set_max_level_from_string(optarg)) < 0) {
767 log_error("Failed to parse log level %s.", optarg);
775 if ((r = log_set_target_from_string(optarg)) < 0) {
776 log_error("Failed to parse log target %s.", optarg);
785 if ((r = log_show_color_from_string(optarg)) < 0) {
786 log_error("Failed to parse log color setting %s.", optarg);
790 log_show_color(true);
794 case ARG_LOG_LOCATION:
797 if ((r = log_show_location_from_string(optarg)) < 0) {
798 log_error("Failed to parse log location setting %s.", optarg);
802 log_show_location(true);
806 case ARG_DEFAULT_STD_OUTPUT:
808 if ((r = exec_output_from_string(optarg)) < 0) {
809 log_error("Failed to parse default standard output setting %s.", optarg);
812 arg_default_std_output = r;
815 case ARG_DEFAULT_STD_ERROR:
817 if ((r = exec_output_from_string(optarg)) < 0) {
818 log_error("Failed to parse default standard error output setting %s.", optarg);
821 arg_default_std_error = r;
826 if ((r = set_default_unit(optarg)) < 0) {
827 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
834 arg_running_as = MANAGER_SYSTEM;
838 arg_running_as = MANAGER_USER;
842 arg_action = ACTION_TEST;
845 case ARG_DUMP_CONFIGURATION_ITEMS:
846 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
850 arg_dump_core = true;
853 case ARG_CRASH_SHELL:
854 arg_crash_shell = true;
857 case ARG_CONFIRM_SPAWN:
858 arg_confirm_spawn = true;
861 case ARG_SHOW_STATUS:
864 if ((r = parse_boolean(optarg)) < 0) {
865 log_error("Failed to show status boolean %s.", optarg);
870 arg_show_status = true;
872 #ifdef HAVE_SYSV_COMPAT
873 case ARG_SYSV_CONSOLE:
876 if ((r = parse_boolean(optarg)) < 0) {
877 log_error("Failed to SysV console boolean %s.", optarg);
880 arg_sysv_console = r;
882 arg_sysv_console = true;
886 case ARG_DESERIALIZE: {
890 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
891 log_error("Failed to parse deserialize option %s.", optarg);
895 if (!(f = fdopen(fd, "r"))) {
896 log_error("Failed to open serialization fd: %m");
901 fclose(serialization);
908 case ARG_INTROSPECT: {
909 const char * const * i = NULL;
911 for (i = bus_interface_table; *i; i += 2)
912 if (!optarg || streq(i[0], optarg)) {
913 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
916 fputs("</node>\n", stdout);
923 log_error("Unknown interface %s.", optarg);
925 arg_action = ACTION_DONE;
930 arg_action = ACTION_HELP;
934 log_set_max_level(LOG_DEBUG);
940 /* Just to eat away the sysvinit kernel
941 * cmdline args without getopt() error
942 * messages that we'll parse in
943 * parse_proc_cmdline_word() or ignore. */
948 log_error("Unknown option code %c", c);
955 if (optind < argc && getpid() != 1) {
956 /* Hmm, when we aren't run as init system
957 * let's complain about excess arguments */
959 log_error("Excess arguments.");
963 if (detect_container(NULL) > 0) {
966 /* All /proc/cmdline arguments the kernel didn't
967 * understand it passed to us. We're not really
968 * interested in that usually since /proc/cmdline is
969 * more interesting and complete. With one exception:
970 * if we are run in a container /proc/cmdline is not
971 * relevant for the container, hence we rely on argv[]
974 for (a = argv; a < argv + argc; a++)
975 if ((r = parse_proc_cmdline_word(*a)) < 0)
982 static int help(void) {
984 printf("%s [OPTIONS...]\n\n"
985 "Starts up and maintains the system or user services.\n\n"
986 " -h --help Show this help\n"
987 " --test Determine startup sequence, dump it and exit\n"
988 " --dump-configuration-items Dump understood unit configuration items\n"
989 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
990 " --unit=UNIT Set default unit\n"
991 " --system Run a system instance, even if PID != 1\n"
992 " --user Run a user instance\n"
993 " --dump-core Dump core on crash\n"
994 " --crash-shell Run shell on crash\n"
995 " --confirm-spawn Ask for confirmation when spawning processes\n"
996 " --show-status[=0|1] Show status updates on the console during bootup\n"
997 #ifdef HAVE_SYSV_COMPAT
998 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
1000 " --log-target=TARGET Set log target (console, journal, syslog, kmsg, journal-or-kmsg, syslog-or-kmsg, null)\n"
1001 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
1002 " --log-color[=0|1] Highlight important log messages\n"
1003 " --log-location[=0|1] Include code location in log messages\n"
1004 " --default-standard-output= Set default standard output for services\n"
1005 " --default-standard-error= Set default standard error output for services\n",
1006 program_invocation_short_name);
1011 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
1020 /* Make sure nothing is really destructed when we shut down */
1023 if ((r = manager_open_serialization(m, &f)) < 0) {
1024 log_error("Failed to create serialization file: %s", strerror(-r));
1028 if (!(fds = fdset_new())) {
1030 log_error("Failed to allocate fd set: %s", strerror(-r));
1034 if ((r = manager_serialize(m, f, fds)) < 0) {
1035 log_error("Failed to serialize state: %s", strerror(-r));
1039 if (fseeko(f, 0, SEEK_SET) < 0) {
1040 log_error("Failed to rewind serialization fd: %m");
1044 if ((r = fd_cloexec(fileno(f), false)) < 0) {
1045 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
1049 if ((r = fdset_cloexec(fds, false)) < 0) {
1050 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
1068 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
1070 unsigned long long a, b;
1074 if (!(e = getenv("RD_TIMESTAMP")))
1077 if (sscanf(e, "%llu %llu", &a, &b) != 2)
1080 t->realtime = (usec_t) a;
1081 t->monotonic = (usec_t) b;
1086 static void test_mtab(void) {
1089 /* Check that /etc/mtab is a symlink */
1091 if (readlink_malloc("/etc/mtab", &p) >= 0) {
1094 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
1101 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
1102 "This is not supported anymore. "
1103 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
1106 static void test_usr(void) {
1108 /* Check that /usr is not a separate fs */
1110 if (dir_is_empty("/usr") <= 0)
1113 log_warning("/usr appears to be on its own filesytem and is not already mounted. This is not a supported setup. "
1114 "Some things will probably break (sometimes even silently) in mysterious ways. "
1115 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
1118 static void test_cgroups(void) {
1120 if (access("/proc/cgroups", F_OK) >= 0)
1123 log_warning("CONFIG_CGROUPS was not set when your kernel was compiled. "
1124 "Systems without control groups are not supported. "
1125 "We will now sleep for 10s, and then continue boot-up. "
1126 "Expect breakage and please do not file bugs. "
1127 "Instead fix your kernel and enable CONFIG_CGROUPS." );
1132 int main(int argc, char *argv[]) {
1134 int r, retval = EXIT_FAILURE;
1135 usec_t before_startup, after_startup;
1136 char timespan[FORMAT_TIMESPAN_MAX];
1138 bool reexecute = false;
1139 const char *shutdown_verb = NULL;
1140 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
1141 static char systemd[] = "systemd";
1142 bool is_reexec = false;
1144 bool loaded_policy = false;
1146 #ifdef HAVE_SYSV_COMPAT
1147 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
1148 /* This is compatibility support for SysV, where
1149 * calling init as a user is identical to telinit. */
1152 execv(SYSTEMCTL_BINARY_PATH, argv);
1153 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
1158 /* Determine if this is a reexecution or normal bootup. We do
1159 * the full command line parsing much later, so let's just
1160 * have a quick peek here. */
1162 for (j = 1; j < argc; j++)
1163 if (streq(argv[j], "--deserialize")) {
1168 /* If we get started via the /sbin/init symlink then we are
1169 called 'init'. After a subsequent reexecution we are then
1170 called 'systemd'. That is confusing, hence let's call us
1171 systemd right-away. */
1172 program_invocation_short_name = systemd;
1173 prctl(PR_SET_NAME, systemd);
1178 log_show_color(isatty(STDERR_FILENO) > 0);
1179 log_show_location(false);
1180 log_set_max_level(LOG_INFO);
1182 if (getpid() == 1) {
1183 arg_running_as = MANAGER_SYSTEM;
1184 log_set_target(detect_container(NULL) > 0 ? LOG_TARGET_CONSOLE : LOG_TARGET_JOURNAL_OR_KMSG);
1187 if (selinux_setup(&loaded_policy) < 0)
1192 if (label_init() < 0)
1196 if (hwclock_is_localtime() > 0) {
1199 r = hwclock_apply_localtime_delta(&min);
1201 log_error("Failed to apply local time delta, ignoring: %s", strerror(-r));
1203 log_info("RTC configured in localtime, applying delta of %i minutes to system time.", min);
1207 arg_running_as = MANAGER_USER;
1208 log_set_target(LOG_TARGET_AUTO);
1212 /* Initialize default unit */
1213 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1216 /* By default, mount "cpu" and "cpuacct" together */
1217 arg_join_controllers = new(char**, 2);
1218 if (!arg_join_controllers)
1221 arg_join_controllers[0] = strv_new("cpu", "cpuacct", NULL);
1222 arg_join_controllers[1] = NULL;
1224 if (!arg_join_controllers[0])
1227 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1228 * /proc/$PID/fd is available. */
1229 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1230 r = mount_setup(loaded_policy);
1235 /* Reset all signal handlers. */
1236 assert_se(reset_all_signal_handlers() == 0);
1238 /* If we are init, we can block sigkill. Yay. */
1239 ignore_signals(SIGNALS_IGNORE, -1);
1241 if (parse_config_file() < 0)
1244 if (arg_running_as == MANAGER_SYSTEM)
1245 if (parse_proc_cmdline() < 0)
1248 log_parse_environment();
1250 if (parse_argv(argc, argv) < 0)
1253 if (arg_action == ACTION_TEST && geteuid() == 0) {
1254 log_error("Don't run test mode as root.");
1258 if (arg_running_as == MANAGER_SYSTEM &&
1259 arg_action == ACTION_RUN &&
1260 running_in_chroot() > 0) {
1261 log_error("Cannot be run in a chroot() environment.");
1265 if (arg_action == ACTION_HELP) {
1268 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1269 unit_dump_config_items(stdout);
1270 retval = EXIT_SUCCESS;
1272 } else if (arg_action == ACTION_DONE) {
1273 retval = EXIT_SUCCESS;
1277 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1279 /* Close logging fds, in order not to confuse fdset below */
1282 /* Remember open file descriptors for later deserialization */
1283 if (serialization) {
1284 if ((r = fdset_new_fill(&fds)) < 0) {
1285 log_error("Failed to allocate fd set: %s", strerror(-r));
1289 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1291 close_all_fds(NULL, 0);
1293 /* Set up PATH unless it is already set */
1295 #ifdef HAVE_SPLIT_USR
1296 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1298 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
1300 arg_running_as == MANAGER_SYSTEM);
1302 if (arg_running_as == MANAGER_SYSTEM) {
1303 /* Parse the data passed to us by the initrd and unset it */
1304 parse_initrd_timestamp(&initrd_timestamp);
1305 filter_environ("RD_");
1307 /* Unset some environment variables passed in from the
1308 * kernel that don't really make sense for us. */
1312 /* All other variables are left as is, so that clients
1313 * can still read them via /proc/1/environ */
1316 /* Move out of the way, so that we won't block unmounts */
1317 assert_se(chdir("/") == 0);
1319 if (arg_running_as == MANAGER_SYSTEM) {
1320 /* Become a session leader if we aren't one yet. */
1323 /* Disable the umask logic */
1327 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1328 dbus_connection_set_change_sigpipe(FALSE);
1330 /* Reset the console, but only if this is really init and we
1331 * are freshly booted */
1332 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1333 console_setup(getpid() == 1 && !is_reexec);
1337 /* Open the logging devices, if possible and necessary */
1340 /* Make sure we leave a core dump without panicing the
1343 install_crash_handler();
1345 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS")) {
1346 r = mount_cgroup_controllers(arg_join_controllers);
1351 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1352 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1354 if (arg_running_as == MANAGER_SYSTEM && !is_reexec) {
1357 if (arg_show_status || plymouth_running())
1370 if ((r = manager_new(arg_running_as, &m)) < 0) {
1371 log_error("Failed to allocate manager object: %s", strerror(-r));
1375 m->confirm_spawn = arg_confirm_spawn;
1376 #ifdef HAVE_SYSV_COMPAT
1377 m->sysv_console = arg_sysv_console;
1379 m->mount_auto = arg_mount_auto;
1380 m->swap_auto = arg_swap_auto;
1381 m->default_std_output = arg_default_std_output;
1382 m->default_std_error = arg_default_std_error;
1384 if (dual_timestamp_is_set(&initrd_timestamp))
1385 m->initrd_timestamp = initrd_timestamp;
1387 if (arg_default_controllers)
1388 manager_set_default_controllers(m, arg_default_controllers);
1390 manager_set_show_status(m, arg_show_status);
1392 before_startup = now(CLOCK_MONOTONIC);
1394 if ((r = manager_startup(m, serialization, fds)) < 0)
1395 log_error("Failed to fully start up daemon: %s", strerror(-r));
1398 /* This will close all file descriptors that were opened, but
1399 * not claimed by any unit. */
1405 if (serialization) {
1406 fclose(serialization);
1407 serialization = NULL;
1410 Unit *target = NULL;
1411 Job *default_unit_job;
1413 dbus_error_init(&error);
1415 log_debug("Activating default unit: %s", arg_default_unit);
1417 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1418 log_error("Failed to load default target: %s", bus_error(&error, r));
1419 dbus_error_free(&error);
1420 } else if (target->load_state == UNIT_ERROR)
1421 log_error("Failed to load default target: %s", strerror(-target->load_error));
1422 else if (target->load_state == UNIT_MASKED)
1423 log_error("Default target masked.");
1425 if (!target || target->load_state != UNIT_LOADED) {
1426 log_info("Trying to load rescue target...");
1428 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1429 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1430 dbus_error_free(&error);
1432 } else if (target->load_state == UNIT_ERROR) {
1433 log_error("Failed to load rescue target: %s", strerror(-target->load_error));
1435 } else if (target->load_state == UNIT_MASKED) {
1436 log_error("Rescue target masked.");
1441 assert(target->load_state == UNIT_LOADED);
1443 if (arg_action == ACTION_TEST) {
1444 printf("-> By units:\n");
1445 manager_dump_units(m, stdout, "\t");
1448 r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, &default_unit_job);
1450 log_error("Failed to start default target: %s", bus_error(&error, r));
1451 dbus_error_free(&error);
1454 m->default_unit_job_id = default_unit_job->id;
1456 after_startup = now(CLOCK_MONOTONIC);
1457 log_full(arg_action == ACTION_TEST ? LOG_INFO : LOG_DEBUG,
1458 "Loaded units and determined initial transaction in %s.",
1459 format_timespan(timespan, sizeof(timespan), after_startup - before_startup));
1461 if (arg_action == ACTION_TEST) {
1462 printf("-> By jobs:\n");
1463 manager_dump_jobs(m, stdout, "\t");
1464 retval = EXIT_SUCCESS;
1470 if ((r = manager_loop(m)) < 0) {
1471 log_error("Failed to run mainloop: %s", strerror(-r));
1475 switch (m->exit_code) {
1478 retval = EXIT_SUCCESS;
1482 case MANAGER_RELOAD:
1483 log_info("Reloading.");
1484 if ((r = manager_reload(m)) < 0)
1485 log_error("Failed to reload: %s", strerror(-r));
1488 case MANAGER_REEXECUTE:
1489 if (prepare_reexecute(m, &serialization, &fds) < 0)
1493 log_notice("Reexecuting.");
1496 case MANAGER_REBOOT:
1497 case MANAGER_POWEROFF:
1499 case MANAGER_KEXEC: {
1500 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1501 [MANAGER_REBOOT] = "reboot",
1502 [MANAGER_POWEROFF] = "poweroff",
1503 [MANAGER_HALT] = "halt",
1504 [MANAGER_KEXEC] = "kexec"
1507 assert_se(shutdown_verb = table[m->exit_code]);
1509 log_notice("Shutting down.");
1514 assert_not_reached("Unknown exit code.");
1522 free(arg_default_unit);
1523 strv_free(arg_default_controllers);
1524 free_join_controllers();
1531 const char *args[15];
1535 assert(serialization);
1538 args[i++] = SYSTEMD_BINARY_PATH;
1540 args[i++] = "--log-level";
1541 args[i++] = log_level_to_string(log_get_max_level());
1543 args[i++] = "--log-target";
1544 args[i++] = log_target_to_string(log_get_target());
1546 if (arg_running_as == MANAGER_SYSTEM)
1547 args[i++] = "--system";
1549 args[i++] = "--user";
1552 args[i++] = "--dump-core";
1554 if (arg_crash_shell)
1555 args[i++] = "--crash-shell";
1557 if (arg_confirm_spawn)
1558 args[i++] = "--confirm-spawn";
1560 if (arg_show_status)
1561 args[i++] = "--show-status=1";
1563 args[i++] = "--show-status=0";
1565 #ifdef HAVE_SYSV_COMPAT
1566 if (arg_sysv_console)
1567 args[i++] = "--sysv-console=1";
1569 args[i++] = "--sysv-console=0";
1572 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1575 args[i++] = "--deserialize";
1580 assert(i <= ELEMENTSOF(args));
1582 execv(args[0], (char* const*) args);
1584 log_error("Failed to reexecute: %m");
1588 fclose(serialization);
1593 if (shutdown_verb) {
1594 const char * command_line[] = {
1595 SYSTEMD_SHUTDOWN_BINARY_PATH,
1600 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1601 log_error("Failed to execute shutdown binary, freezing: %m");