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"
59 ACTION_DUMP_CONFIGURATION_ITEMS,
61 } arg_action = ACTION_RUN;
63 static char *arg_default_unit = NULL;
64 static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
66 static bool arg_dump_core = true;
67 static bool arg_crash_shell = false;
68 static int arg_crash_chvt = -1;
69 static bool arg_confirm_spawn = false;
70 static bool arg_show_status = true;
71 #ifdef HAVE_SYSV_COMPAT
72 static bool arg_sysv_console = true;
74 static bool arg_mount_auto = true;
75 static bool arg_swap_auto = true;
76 static char **arg_default_controllers = NULL;
77 static ExecOutput arg_default_std_output = EXEC_OUTPUT_INHERIT;
78 static ExecOutput arg_default_std_error = EXEC_OUTPUT_INHERIT;
80 static FILE* serialization = NULL;
82 static void nop_handler(int sig) {
85 _noreturn_ static void crash(int sig) {
88 log_error("Caught <%s>, not dumping core.", signal_to_string(sig));
93 /* We want to wait for the core process, hence let's enable SIGCHLD */
95 sa.sa_handler = nop_handler;
96 sa.sa_flags = SA_NOCLDSTOP|SA_RESTART;
97 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
99 if ((pid = fork()) < 0)
100 log_error("Caught <%s>, cannot fork for core dump: %s", signal_to_string(sig), strerror(errno));
105 /* Enable default signal handler for core dump */
107 sa.sa_handler = SIG_DFL;
108 assert_se(sigaction(sig, &sa, NULL) == 0);
110 /* Don't limit the core dump size */
112 rl.rlim_cur = RLIM_INFINITY;
113 rl.rlim_max = RLIM_INFINITY;
114 setrlimit(RLIMIT_CORE, &rl);
116 /* Just to be sure... */
117 assert_se(chdir("/") == 0);
119 /* Raise the signal again */
122 assert_not_reached("We shouldn't be here...");
129 /* Order things nicely. */
130 if ((r = wait_for_terminate(pid, &status)) < 0)
131 log_error("Caught <%s>, waitpid() failed: %s", signal_to_string(sig), strerror(-r));
132 else if (status.si_code != CLD_DUMPED)
133 log_error("Caught <%s>, core dump failed.", signal_to_string(sig));
135 log_error("Caught <%s>, dumped core as pid %lu.", signal_to_string(sig), (unsigned long) pid);
140 chvt(arg_crash_chvt);
142 if (arg_crash_shell) {
146 log_info("Executing crash shell in 10s...");
149 /* Let the kernel reap children for us */
151 sa.sa_handler = SIG_IGN;
152 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT|SA_RESTART;
153 assert_se(sigaction(SIGCHLD, &sa, NULL) == 0);
155 if ((pid = fork()) < 0)
156 log_error("Failed to fork off crash shell: %s", strerror(errno));
160 if ((fd = acquire_terminal("/dev/console", false, true, true)) < 0)
161 log_error("Failed to acquire terminal: %s", strerror(-fd));
162 else if ((r = make_stdio(fd)) < 0)
163 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
165 execl("/bin/sh", "/bin/sh", NULL);
167 log_error("execl() failed: %s", strerror(errno));
171 log_info("Successfully spawned crash shall as pid %lu.", (unsigned long) pid);
174 log_info("Freezing execution.");
178 static void install_crash_handler(void) {
183 sa.sa_handler = crash;
184 sa.sa_flags = SA_NODEFER;
186 sigaction_many(&sa, SIGNALS_CRASH_HANDLER, -1);
189 static int console_setup(bool do_reset) {
192 /* If we are init, we connect stdin/stdout/stderr to /dev/null
193 * and make sure we don't have a controlling tty. */
200 if ((tty_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC)) < 0) {
201 log_error("Failed to open /dev/console: %s", strerror(-tty_fd));
205 if ((r = reset_terminal(tty_fd)) < 0)
206 log_error("Failed to reset /dev/console: %s", strerror(-r));
208 close_nointr_nofail(tty_fd);
212 static int set_default_unit(const char *u) {
217 if (!(c = strdup(u)))
220 free(arg_default_unit);
221 arg_default_unit = c;
225 static int parse_proc_cmdline_word(const char *word) {
227 static const char * const rlmap[] = {
228 "emergency", SPECIAL_EMERGENCY_TARGET,
229 "-b", SPECIAL_EMERGENCY_TARGET,
230 "b", SPECIAL_EMERGENCY_TARGET,
231 "single", SPECIAL_RESCUE_TARGET,
232 "-s", SPECIAL_RESCUE_TARGET,
233 "s", SPECIAL_RESCUE_TARGET,
234 "S", SPECIAL_RESCUE_TARGET,
235 "1", SPECIAL_RESCUE_TARGET,
236 "2", SPECIAL_RUNLEVEL2_TARGET,
237 "3", SPECIAL_RUNLEVEL3_TARGET,
238 "4", SPECIAL_RUNLEVEL4_TARGET,
239 "5", SPECIAL_RUNLEVEL5_TARGET,
244 if (startswith(word, "systemd.unit="))
245 return set_default_unit(word + 13);
247 else if (startswith(word, "systemd.log_target=")) {
249 if (log_set_target_from_string(word + 19) < 0)
250 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
252 } else if (startswith(word, "systemd.log_level=")) {
254 if (log_set_max_level_from_string(word + 18) < 0)
255 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
257 } else if (startswith(word, "systemd.log_color=")) {
259 if (log_show_color_from_string(word + 18) < 0)
260 log_warning("Failed to parse log color setting %s. Ignoring.", word + 18);
262 } else if (startswith(word, "systemd.log_location=")) {
264 if (log_show_location_from_string(word + 21) < 0)
265 log_warning("Failed to parse log location setting %s. Ignoring.", word + 21);
267 } else if (startswith(word, "systemd.dump_core=")) {
270 if ((r = parse_boolean(word + 18)) < 0)
271 log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
275 } else if (startswith(word, "systemd.crash_shell=")) {
278 if ((r = parse_boolean(word + 20)) < 0)
279 log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
283 } else if (startswith(word, "systemd.confirm_spawn=")) {
286 if ((r = parse_boolean(word + 22)) < 0)
287 log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
289 arg_confirm_spawn = r;
291 } else if (startswith(word, "systemd.crash_chvt=")) {
294 if (safe_atoi(word + 19, &k) < 0)
295 log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
299 } else if (startswith(word, "systemd.show_status=")) {
302 if ((r = parse_boolean(word + 20)) < 0)
303 log_warning("Failed to parse show status switch %s, Ignoring.", word + 20);
306 } else if (startswith(word, "systemd.default_standard_output=")) {
309 if ((r = exec_output_from_string(word + 32)) < 0)
310 log_warning("Failed to parse default standard output switch %s, Ignoring.", word + 32);
312 arg_default_std_output = r;
313 } else if (startswith(word, "systemd.default_standard_error=")) {
316 if ((r = exec_output_from_string(word + 31)) < 0)
317 log_warning("Failed to parse default standard error switch %s, Ignoring.", word + 31);
319 arg_default_std_error = r;
320 #ifdef HAVE_SYSV_COMPAT
321 } else if (startswith(word, "systemd.sysv_console=")) {
324 if ((r = parse_boolean(word + 21)) < 0)
325 log_warning("Failed to parse SysV console switch %s, Ignoring.", word + 20);
327 arg_sysv_console = r;
330 } else if (startswith(word, "systemd.")) {
332 log_warning("Unknown kernel switch %s. Ignoring.", word);
334 log_info("Supported kernel switches:\n"
335 "systemd.unit=UNIT Default unit to start\n"
336 "systemd.dump_core=0|1 Dump core on crash\n"
337 "systemd.crash_shell=0|1 Run shell on crash\n"
338 "systemd.crash_chvt=N Change to VT #N on crash\n"
339 "systemd.confirm_spawn=0|1 Confirm every process spawn\n"
340 "systemd.show_status=0|1 Show status updates on the console during bootup\n"
341 #ifdef HAVE_SYSV_COMPAT
342 "systemd.sysv_console=0|1 Connect output of SysV scripts to console\n"
344 "systemd.log_target=console|kmsg|syslog|syslog-or-kmsg|null\n"
346 "systemd.log_level=LEVEL Log level\n"
347 "systemd.log_color=0|1 Highlight important log messages\n"
348 "systemd.log_location=0|1 Include code location in log messages\n"
349 "systemd.default_standard_output=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
350 " Set default log output for services\n"
351 "systemd.default_standard_error=null|tty|syslog|syslog+console|kmsg|kmsg+console\n"
352 " Set default log error output for services\n");
354 } else if (streq(word, "quiet")) {
355 arg_show_status = false;
356 #ifdef HAVE_SYSV_COMPAT
357 arg_sysv_console = false;
362 /* SysV compatibility */
363 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
364 if (streq(word, rlmap[i]))
365 return set_default_unit(rlmap[i+1]);
371 static int config_parse_level(
372 const char *filename,
384 log_set_max_level_from_string(rvalue);
388 static int config_parse_target(
389 const char *filename,
401 log_set_target_from_string(rvalue);
405 static int config_parse_color(
406 const char *filename,
418 log_show_color_from_string(rvalue);
422 static int config_parse_location(
423 const char *filename,
435 log_show_location_from_string(rvalue);
439 static int config_parse_cpu_affinity(
440 const char *filename,
458 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
463 if (!(t = strndup(w, l)))
466 r = safe_atou(t, &cpu);
470 if (!(c = cpu_set_malloc(&ncpus)))
473 if (r < 0 || cpu >= ncpus) {
474 log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
479 CPU_SET_S(cpu, CPU_ALLOC_SIZE(ncpus), c);
483 if (sched_setaffinity(0, CPU_ALLOC_SIZE(ncpus), c) < 0)
484 log_warning("Failed to set CPU affinity: %m");
492 static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
494 static int parse_config_file(void) {
496 const ConfigItem items[] = {
497 { "LogLevel", config_parse_level, NULL, "Manager" },
498 { "LogTarget", config_parse_target, NULL, "Manager" },
499 { "LogColor", config_parse_color, NULL, "Manager" },
500 { "LogLocation", config_parse_location, NULL, "Manager" },
501 { "DumpCore", config_parse_bool, &arg_dump_core, "Manager" },
502 { "CrashShell", config_parse_bool, &arg_crash_shell, "Manager" },
503 { "ShowStatus", config_parse_bool, &arg_show_status, "Manager" },
504 #ifdef HAVE_SYSV_COMPAT
505 { "SysVConsole", config_parse_bool, &arg_sysv_console, "Manager" },
507 { "CrashChVT", config_parse_int, &arg_crash_chvt, "Manager" },
508 { "CPUAffinity", config_parse_cpu_affinity, NULL, "Manager" },
509 { "MountAuto", config_parse_bool, &arg_mount_auto, "Manager" },
510 { "SwapAuto", config_parse_bool, &arg_swap_auto, "Manager" },
511 { "DefaultControllers", config_parse_strv, &arg_default_controllers, "Manager" },
512 { "DefaultStandardOutput", config_parse_output, &arg_default_std_output, "Manager" },
513 { "DefaultStandardError", config_parse_output, &arg_default_std_error, "Manager" },
514 { NULL, NULL, NULL, NULL }
517 static const char * const sections[] = {
526 fn = arg_running_as == MANAGER_SYSTEM ? SYSTEM_CONFIG_FILE : USER_CONFIG_FILE;
528 if (!(f = fopen(fn, "re"))) {
532 log_warning("Failed to open configuration file '%s': %m", fn);
536 if ((r = config_parse(fn, f, sections, items, false, NULL)) < 0)
537 log_warning("Failed to parse configuration file: %s", strerror(-r));
544 static int parse_proc_cmdline(void) {
545 char *line, *w, *state;
549 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
550 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
554 FOREACH_WORD_QUOTED(w, l, line, state) {
557 if (!(word = strndup(w, l))) {
562 r = parse_proc_cmdline_word(word);
576 static int parse_argv(int argc, char *argv[]) {
579 ARG_LOG_LEVEL = 0x100,
587 ARG_DUMP_CONFIGURATION_ITEMS,
595 ARG_DEFAULT_STD_OUTPUT,
596 ARG_DEFAULT_STD_ERROR
599 static const struct option options[] = {
600 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
601 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
602 { "log-color", optional_argument, NULL, ARG_LOG_COLOR },
603 { "log-location", optional_argument, NULL, ARG_LOG_LOCATION },
604 { "unit", required_argument, NULL, ARG_UNIT },
605 { "system", no_argument, NULL, ARG_SYSTEM },
606 { "user", no_argument, NULL, ARG_USER },
607 { "test", no_argument, NULL, ARG_TEST },
608 { "help", no_argument, NULL, 'h' },
609 { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
610 { "dump-core", no_argument, NULL, ARG_DUMP_CORE },
611 { "crash-shell", no_argument, NULL, ARG_CRASH_SHELL },
612 { "confirm-spawn", no_argument, NULL, ARG_CONFIRM_SPAWN },
613 { "show-status", optional_argument, NULL, ARG_SHOW_STATUS },
614 #ifdef HAVE_SYSV_COMPAT
615 { "sysv-console", optional_argument, NULL, ARG_SYSV_CONSOLE },
617 { "deserialize", required_argument, NULL, ARG_DESERIALIZE },
618 { "introspect", optional_argument, NULL, ARG_INTROSPECT },
619 { "default-standard-output", required_argument, NULL, ARG_DEFAULT_STD_OUTPUT, },
620 { "default-standard-error", required_argument, NULL, ARG_DEFAULT_STD_ERROR, },
629 while ((c = getopt_long(argc, argv, "hDbsz:", options, NULL)) >= 0)
634 if ((r = log_set_max_level_from_string(optarg)) < 0) {
635 log_error("Failed to parse log level %s.", optarg);
643 if ((r = log_set_target_from_string(optarg)) < 0) {
644 log_error("Failed to parse log target %s.", optarg);
653 if ((r = log_show_color_from_string(optarg)) < 0) {
654 log_error("Failed to parse log color setting %s.", optarg);
658 log_show_color(true);
662 case ARG_LOG_LOCATION:
665 if ((r = log_show_location_from_string(optarg)) < 0) {
666 log_error("Failed to parse log location setting %s.", optarg);
670 log_show_location(true);
674 case ARG_DEFAULT_STD_OUTPUT:
676 if ((r = exec_output_from_string(optarg)) < 0) {
677 log_error("Failed to parse default standard output setting %s.", optarg);
680 arg_default_std_output = r;
683 case ARG_DEFAULT_STD_ERROR:
685 if ((r = exec_output_from_string(optarg)) < 0) {
686 log_error("Failed to parse default standard error output setting %s.", optarg);
689 arg_default_std_error = r;
694 if ((r = set_default_unit(optarg)) < 0) {
695 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
702 arg_running_as = MANAGER_SYSTEM;
706 arg_running_as = MANAGER_USER;
710 arg_action = ACTION_TEST;
713 case ARG_DUMP_CONFIGURATION_ITEMS:
714 arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
718 arg_dump_core = true;
721 case ARG_CRASH_SHELL:
722 arg_crash_shell = true;
725 case ARG_CONFIRM_SPAWN:
726 arg_confirm_spawn = true;
729 case ARG_SHOW_STATUS:
732 if ((r = parse_boolean(optarg)) < 0) {
733 log_error("Failed to show status boolean %s.", optarg);
738 arg_show_status = true;
740 #ifdef HAVE_SYSV_COMPAT
741 case ARG_SYSV_CONSOLE:
744 if ((r = parse_boolean(optarg)) < 0) {
745 log_error("Failed to SysV console boolean %s.", optarg);
748 arg_sysv_console = r;
750 arg_sysv_console = true;
754 case ARG_DESERIALIZE: {
758 if ((r = safe_atoi(optarg, &fd)) < 0 || fd < 0) {
759 log_error("Failed to parse deserialize option %s.", optarg);
763 if (!(f = fdopen(fd, "r"))) {
764 log_error("Failed to open serialization fd: %m");
769 fclose(serialization);
776 case ARG_INTROSPECT: {
777 const char * const * i = NULL;
779 for (i = bus_interface_table; *i; i += 2)
780 if (!optarg || streq(i[0], optarg)) {
781 fputs(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE
784 fputs("</node>\n", stdout);
791 log_error("Unknown interface %s.", optarg);
793 arg_action = ACTION_DONE;
798 arg_action = ACTION_HELP;
802 log_set_max_level(LOG_DEBUG);
808 /* Just to eat away the sysvinit kernel
809 * cmdline args without getopt() error
810 * messages that we'll parse in
811 * parse_proc_cmdline_word() or ignore. */
816 log_error("Unknown option code %c", c);
823 /* PID 1 will get the kernel arguments as parameters, which we
824 * ignore and unconditionally read from
825 * /proc/cmdline. However, we need to ignore those arguments
827 if (getpid() != 1 && optind < argc) {
828 log_error("Excess arguments.");
835 static int help(void) {
837 printf("%s [OPTIONS...]\n\n"
838 "Starts up and maintains the system or user services.\n\n"
839 " -h --help Show this help\n"
840 " --test Determine startup sequence, dump it and exit\n"
841 " --dump-configuration-items Dump understood unit configuration items\n"
842 " --introspect[=INTERFACE] Extract D-Bus interface data\n"
843 " --unit=UNIT Set default unit\n"
844 " --system Run a system instance, even if PID != 1\n"
845 " --user Run a user instance\n"
846 " --dump-core Dump core on crash\n"
847 " --crash-shell Run shell on crash\n"
848 " --confirm-spawn Ask for confirmation when spawning processes\n"
849 " --show-status[=0|1] Show status updates on the console during bootup\n"
850 #ifdef HAVE_SYSV_COMPAT
851 " --sysv-console[=0|1] Connect output of SysV scripts to console\n"
853 " --log-target=TARGET Set log target (console, syslog, kmsg, syslog-or-kmsg, null)\n"
854 " --log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)\n"
855 " --log-color[=0|1] Highlight important log messages\n"
856 " --log-location[=0|1] Include code location in log messages\n"
857 " --default-standard-output= Set default standard output for services\n"
858 " --default-standard-error= Set default standard error output for services\n",
859 program_invocation_short_name);
864 static int prepare_reexecute(Manager *m, FILE **_f, FDSet **_fds) {
873 if ((r = manager_open_serialization(m, &f)) < 0) {
874 log_error("Failed to create serialization file: %s", strerror(-r));
878 if (!(fds = fdset_new())) {
880 log_error("Failed to allocate fd set: %s", strerror(-r));
884 if ((r = manager_serialize(m, f, fds)) < 0) {
885 log_error("Failed to serialize state: %s", strerror(-r));
889 if (fseeko(f, 0, SEEK_SET) < 0) {
890 log_error("Failed to rewind serialization fd: %m");
894 if ((r = fd_cloexec(fileno(f), false)) < 0) {
895 log_error("Failed to disable O_CLOEXEC for serialization: %s", strerror(-r));
899 if ((r = fdset_cloexec(fds, false)) < 0) {
900 log_error("Failed to disable O_CLOEXEC for serialization fds: %s", strerror(-r));
918 static struct dual_timestamp* parse_initrd_timestamp(struct dual_timestamp *t) {
920 unsigned long long a, b;
924 if (!(e = getenv("RD_TIMESTAMP")))
927 if (sscanf(e, "%llu %llu", &a, &b) != 2)
930 t->realtime = (usec_t) a;
931 t->monotonic = (usec_t) b;
936 static void test_mtab(void) {
939 /* Check that /etc/mtab is a symlink */
941 if (readlink_malloc("/etc/mtab", &p) >= 0) {
944 b = streq(p, "/proc/self/mounts") || streq(p, "/proc/mounts");
951 log_warning("/etc/mtab is not a symlink or not pointing to /proc/self/mounts. "
952 "This is not supported anymore. "
953 "Please make sure to replace this file by a symlink to avoid incorrect or misleading mount(8) output.");
956 static void test_usr(void) {
958 /* Check that /usr is not a separate fs */
960 if (dir_is_empty("/usr") > 0)
961 log_warning("/usr appears to be on a different file system than /. This is not supported anymore. "
962 "Some things will probably break (sometimes even silently) in mysterious ways. "
963 "Consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken for more information.");
966 int main(int argc, char *argv[]) {
968 int r, retval = EXIT_FAILURE;
970 bool reexecute = false;
971 const char *shutdown_verb = NULL;
972 dual_timestamp initrd_timestamp = { 0ULL, 0ULL };
973 char systemd[] = "systemd";
975 if (getpid() != 1 && strstr(program_invocation_short_name, "init")) {
976 /* This is compatibility support for SysV, where
977 * calling init as a user is identical to telinit. */
980 execv(SYSTEMCTL_BINARY_PATH, argv);
981 log_error("Failed to exec " SYSTEMCTL_BINARY_PATH ": %m");
985 /* If we get started via the /sbin/init symlink then we are
986 called 'init'. After a subsequent reexecution we are then
987 called 'systemd'. That is confusing, hence let's call us
988 systemd right-away. */
990 program_invocation_short_name = systemd;
991 prctl(PR_SET_NAME, systemd);
993 log_show_color(isatty(STDERR_FILENO) > 0);
994 log_show_location(false);
995 log_set_max_level(LOG_INFO);
998 arg_running_as = MANAGER_SYSTEM;
999 log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
1001 /* This might actually not return, but cause a
1003 if (selinux_setup(argv) < 0)
1006 if (label_init() < 0)
1009 arg_running_as = MANAGER_USER;
1010 log_set_target(LOG_TARGET_CONSOLE);
1013 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
1016 /* Mount /proc, /sys and friends, so that /proc/cmdline and
1017 * /proc/$PID/fd is available. */
1018 if (geteuid() == 0 && !getenv("SYSTEMD_SKIP_API_MOUNTS"))
1019 if (mount_setup() < 0)
1022 /* Reset all signal handlers. */
1023 assert_se(reset_all_signal_handlers() == 0);
1025 /* If we are init, we can block sigkill. Yay. */
1026 ignore_signals(SIGNALS_IGNORE, -1);
1028 if (parse_config_file() < 0)
1031 if (arg_running_as == MANAGER_SYSTEM)
1032 if (parse_proc_cmdline() < 0)
1035 log_parse_environment();
1037 if (parse_argv(argc, argv) < 0)
1040 if (arg_action == ACTION_TEST && geteuid() == 0) {
1041 log_error("Don't run test mode as root.");
1045 if (arg_running_as == MANAGER_SYSTEM &&
1046 arg_action == ACTION_RUN &&
1047 running_in_chroot() > 0) {
1048 log_error("Cannot be run in a chroot() environment.");
1052 /* If Plymouth is being run make sure we show the status, so
1053 * that there's something nice to see when people press Esc */
1054 if (access("/dev/.run/initramfs/plymouth", F_OK) >= 0)
1055 arg_show_status = true;
1057 if (arg_action == ACTION_HELP) {
1060 } else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
1061 unit_dump_config_items(stdout);
1062 retval = EXIT_SUCCESS;
1064 } else if (arg_action == ACTION_DONE) {
1065 retval = EXIT_SUCCESS;
1069 assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
1071 /* Remember open file descriptors for later deserialization */
1072 if (serialization) {
1073 if ((r = fdset_new_fill(&fds)) < 0) {
1074 log_error("Failed to allocate fd set: %s", strerror(-r));
1078 assert_se(fdset_remove(fds, fileno(serialization)) >= 0);
1080 close_all_fds(NULL, 0);
1082 /* Set up PATH unless it is already set */
1084 "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
1085 arg_running_as == MANAGER_SYSTEM);
1087 if (arg_running_as == MANAGER_SYSTEM) {
1088 /* Parse the data passed to us by the initrd and unset it */
1089 parse_initrd_timestamp(&initrd_timestamp);
1090 filter_environ("RD_");
1092 /* Unset some environment variables passed in from the
1093 * kernel that don't really make sense for us. */
1098 /* Move out of the way, so that we won't block unmounts */
1099 assert_se(chdir("/") == 0);
1101 if (arg_running_as == MANAGER_SYSTEM) {
1102 /* Become a session leader if we aren't one yet. */
1105 /* Disable the umask logic */
1109 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
1110 dbus_connection_set_change_sigpipe(FALSE);
1112 /* Reset the console, but only if this is really init and we
1113 * are freshly booted */
1114 if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
1115 console_setup(getpid() == 1 && !serialization);
1119 /* Open the logging devices, if possible and necessary */
1122 /* Make sure we leave a core dump without panicing the
1125 install_crash_handler();
1127 log_full(arg_running_as == MANAGER_SYSTEM ? LOG_INFO : LOG_DEBUG,
1128 PACKAGE_STRING " running in %s mode. (" SYSTEMD_FEATURES "; " DISTRIBUTION ")", manager_running_as_to_string(arg_running_as));
1130 if (arg_running_as == MANAGER_SYSTEM && !serialization) {
1133 if (arg_show_status)
1145 if ((r = manager_new(arg_running_as, &m)) < 0) {
1146 log_error("Failed to allocate manager object: %s", strerror(-r));
1150 m->confirm_spawn = arg_confirm_spawn;
1151 m->show_status = arg_show_status;
1152 #ifdef HAVE_SYSV_COMPAT
1153 m->sysv_console = arg_sysv_console;
1155 m->mount_auto = arg_mount_auto;
1156 m->swap_auto = arg_swap_auto;
1157 m->default_std_output = arg_default_std_output;
1158 m->default_std_error = arg_default_std_error;
1160 if (dual_timestamp_is_set(&initrd_timestamp))
1161 m->initrd_timestamp = initrd_timestamp;
1163 if (arg_default_controllers)
1164 manager_set_default_controllers(m, arg_default_controllers);
1166 if ((r = manager_startup(m, serialization, fds)) < 0)
1167 log_error("Failed to fully start up daemon: %s", strerror(-r));
1170 /* This will close all file descriptors that were opened, but
1171 * not claimed by any unit. */
1177 if (serialization) {
1178 fclose(serialization);
1179 serialization = NULL;
1182 Unit *target = NULL;
1184 dbus_error_init(&error);
1186 log_debug("Activating default unit: %s", arg_default_unit);
1188 if ((r = manager_load_unit(m, arg_default_unit, NULL, &error, &target)) < 0) {
1189 log_error("Failed to load default target: %s", bus_error(&error, r));
1190 dbus_error_free(&error);
1191 } else if (target->meta.load_state == UNIT_ERROR)
1192 log_error("Failed to load default target: %s", strerror(-target->meta.load_error));
1193 else if (target->meta.load_state == UNIT_MASKED)
1194 log_error("Default target masked.");
1196 if (!target || target->meta.load_state != UNIT_LOADED) {
1197 log_info("Trying to load rescue target...");
1199 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, NULL, &error, &target)) < 0) {
1200 log_error("Failed to load rescue target: %s", bus_error(&error, r));
1201 dbus_error_free(&error);
1203 } else if (target->meta.load_state == UNIT_ERROR) {
1204 log_error("Failed to load rescue target: %s", strerror(-target->meta.load_error));
1206 } else if (target->meta.load_state == UNIT_MASKED) {
1207 log_error("Rescue target masked.");
1212 assert(target->meta.load_state == UNIT_LOADED);
1214 if (arg_action == ACTION_TEST) {
1215 printf("-> By units:\n");
1216 manager_dump_units(m, stdout, "\t");
1219 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &error, NULL)) < 0) {
1220 log_error("Failed to start default target: %s", bus_error(&error, r));
1221 dbus_error_free(&error);
1225 if (arg_action == ACTION_TEST) {
1226 printf("-> By jobs:\n");
1227 manager_dump_jobs(m, stdout, "\t");
1228 retval = EXIT_SUCCESS;
1234 if ((r = manager_loop(m)) < 0) {
1235 log_error("Failed to run mainloop: %s", strerror(-r));
1239 switch (m->exit_code) {
1242 retval = EXIT_SUCCESS;
1246 case MANAGER_RELOAD:
1247 log_info("Reloading.");
1248 if ((r = manager_reload(m)) < 0)
1249 log_error("Failed to reload: %s", strerror(-r));
1252 case MANAGER_REEXECUTE:
1253 if (prepare_reexecute(m, &serialization, &fds) < 0)
1257 log_notice("Reexecuting.");
1260 case MANAGER_REBOOT:
1261 case MANAGER_POWEROFF:
1263 case MANAGER_KEXEC: {
1264 static const char * const table[_MANAGER_EXIT_CODE_MAX] = {
1265 [MANAGER_REBOOT] = "reboot",
1266 [MANAGER_POWEROFF] = "poweroff",
1267 [MANAGER_HALT] = "halt",
1268 [MANAGER_KEXEC] = "kexec"
1271 assert_se(shutdown_verb = table[m->exit_code]);
1273 log_notice("Shutting down.");
1278 assert_not_reached("Unknown exit code.");
1286 free(arg_default_unit);
1287 strv_free(arg_default_controllers);
1294 const char *args[15];
1298 assert(serialization);
1301 args[i++] = SYSTEMD_BINARY_PATH;
1303 args[i++] = "--log-level";
1304 args[i++] = log_level_to_string(log_get_max_level());
1306 args[i++] = "--log-target";
1307 args[i++] = log_target_to_string(log_get_target());
1309 if (arg_running_as == MANAGER_SYSTEM)
1310 args[i++] = "--system";
1312 args[i++] = "--user";
1315 args[i++] = "--dump-core";
1317 if (arg_crash_shell)
1318 args[i++] = "--crash-shell";
1320 if (arg_confirm_spawn)
1321 args[i++] = "--confirm-spawn";
1323 if (arg_show_status)
1324 args[i++] = "--show-status=1";
1326 args[i++] = "--show-status=0";
1328 #ifdef HAVE_SYSV_COMPAT
1329 if (arg_sysv_console)
1330 args[i++] = "--sysv-console=1";
1332 args[i++] = "--sysv-console=0";
1335 snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
1338 args[i++] = "--deserialize";
1343 assert(i <= ELEMENTSOF(args));
1345 execv(args[0], (char* const*) args);
1347 log_error("Failed to reexecute: %m");
1351 fclose(serialization);
1356 if (shutdown_verb) {
1357 const char * command_line[] = {
1358 SYSTEMD_SHUTDOWN_BINARY_PATH,
1363 execv(SYSTEMD_SHUTDOWN_BINARY_PATH, (char **) command_line);
1364 log_error("Failed to execute shutdown binary, freezing: %m");