[thirdparty/systemd.git] / main.c

/*-*- Mode: C; c-basic-offset: 8 -*-*/

/***
  This file is part of systemd.

  Copyright 2010 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <dbus/dbus.h>

#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <getopt.h>
#include <signal.h>

#include "manager.h"
#include "log.h"
#include "mount-setup.h"
#include "hostname-setup.h"
#include "load-fragment.h"

static enum {
        ACTION_RUN,
        ACTION_HELP,
        ACTION_TEST,
        ACTION_DUMP_CONFIGURATION_ITEMS
} action = ACTION_RUN;

static char *default_unit = NULL;
static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID;
static bool dump_core = true;

_noreturn static void freeze(void) {
        for (;;)
                pause();
}

_noreturn static void crash(int sig) {

        if (!dump_core)
                log_error("Caught <%s>, not dumping core.", strsignal(sig));
        else {
                pid_t pid;

                log_warning("Caugh <%s>, dumping core.", strsignal(sig));

                if ((pid = fork()) < 0)
                        log_error("Caught <%s>, cannot dump core: %s", strsignal(sig), strerror(errno));

                else if (pid == 0) {
                        struct sigaction sa;
                        struct rlimit rl;

                        /* Enable default signal handler for core dump */
                        zero(sa);
                        sa.sa_handler = SIG_DFL;
                        assert_se(sigaction(sig, &sa, NULL) == 0);

                        /* Don't limit the core dump size */
                        zero(rl);
                        rl.rlim_cur = RLIM_INFINITY;
                        rl.rlim_max = RLIM_INFINITY;
                        setrlimit(RLIMIT_CORE, &rl);

                        /* Just to be sure... */
                        assert_se(chdir("/") == 0);

                        /* Raise the signal again */
                        raise(sig);

                        assert_not_reached("We shouldn't be here...");
                        _exit(1);
                }
        }

        log_error("Freezing execution.");
        freeze();
}

static void install_crash_handler(void) {
        struct sigaction sa;

        zero(sa);

        sa.sa_handler = crash;
        sa.sa_flags = SA_NODEFER;

        assert_se(sigaction(SIGSEGV, &sa, NULL) == 0);
        assert_se(sigaction(SIGABRT, &sa, NULL) == 0);
}

static int set_default_unit(const char *u) {
        char *c;

        assert(u);

        if (!(c = strdup(u)))
                return -ENOMEM;

        free(default_unit);
        default_unit = c;
        return 0;
}

static int parse_proc_cmdline_word(const char *word) {

        static const char * const rlmap[] = {
                "single", SPECIAL_RUNLEVEL1_TARGET,
                "-s",     SPECIAL_RUNLEVEL1_TARGET,
                "s",      SPECIAL_RUNLEVEL1_TARGET,
                "S",      SPECIAL_RUNLEVEL1_TARGET,
                "1",      SPECIAL_RUNLEVEL1_TARGET,
                "2",      SPECIAL_RUNLEVEL2_TARGET,
                "3",      SPECIAL_RUNLEVEL3_TARGET,
                "4",      SPECIAL_RUNLEVEL4_TARGET,
                "5",      SPECIAL_RUNLEVEL5_TARGET
        };

        if (startswith(word, "systemd.default="))
                return set_default_unit(word + 16);

        else if (startswith(word, "systemd.log_target=")) {

                if (log_set_target_from_string(word + 19) < 0)
                        log_warning("Failed to parse log target %s. Ignoring.", word + 19);

        } else if (startswith(word, "systemd.log_level=")) {

                if (log_set_max_level_from_string(word + 18) < 0)
                        log_warning("Failed to parse log level %s. Ignoring.", word + 18);

        } else {
                unsigned i;

                /* SysV compatibility */
                for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
                        if (streq(word, rlmap[i]))
                                return set_default_unit(rlmap[i+1]);
        }

        return 0;
}

static int parse_proc_cmdline(void) {
        char *line;
        int r;
        char *w;
        size_t l;
        char *state;

        if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
                log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno));
                return 0;
        }

        FOREACH_WORD_QUOTED(w, l, line, state) {
                char *word;

                if (!(word = strndup(w, l))) {
                        r = -ENOMEM;
                        goto finish;
                }

                r = parse_proc_cmdline_word(word);
                free(word);

                if (r < 0)
                        goto finish;
        }

        r = 0;

finish:
        free(line);
        return r;
}

static int parse_argv(int argc, char *argv[]) {

        enum {
                ARG_LOG_LEVEL = 0x100,
                ARG_LOG_TARGET,
                ARG_DEFAULT,
                ARG_RUNNING_AS,
                ARG_TEST,
                ARG_DUMP_CONFIGURATION_ITEMS
        };

        static const struct option options[] = {
                { "log-level",  required_argument, NULL, ARG_LOG_LEVEL },
                { "log-target", required_argument, NULL, ARG_LOG_TARGET },
                { "default",    required_argument, NULL, ARG_DEFAULT },
                { "running-as", required_argument, NULL, ARG_RUNNING_AS },
                { "test",       no_argument,       NULL, ARG_TEST },
                { "help",       no_argument,       NULL, 'h' },
                { "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
                { NULL,         0,                 NULL, 0 }
        };

        int c, r;

        assert(argc >= 1);
        assert(argv);

        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)

                switch (c) {

                case ARG_LOG_LEVEL:
                        if ((r = log_set_max_level_from_string(optarg)) < 0) {
                                log_error("Failed to parse log level %s.", optarg);
                                return r;
                        }

                        break;

                case ARG_LOG_TARGET:

                        if ((r = log_set_target_from_string(optarg)) < 0) {
                                log_error("Failed to parse log target %s.", optarg);
                                return r;
                        }

                        break;

                case ARG_DEFAULT:

                        if ((r = set_default_unit(optarg)) < 0) {
                                log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
                                return r;
                        }

                        break;

                case ARG_RUNNING_AS: {
                        ManagerRunningAs as;

                        if ((as = manager_running_as_from_string(optarg)) < 0) {
                                log_error("Failed to parse running as value %s", optarg);
                                return -EINVAL;
                        }

                        running_as = as;
                        break;
                }

                case ARG_TEST:
                        action = ACTION_TEST;
                        break;

                case ARG_DUMP_CONFIGURATION_ITEMS:
                        action = ACTION_DUMP_CONFIGURATION_ITEMS;
                        break;

                case 'h':
                        action = ACTION_HELP;
                        break;

                case '?':
                        return -EINVAL;

                default:
                        log_error("Unknown option code %c", c);
                        return -EINVAL;
                }

        return 0;
}

static int help(void) {

        printf("%s [options]\n\n"
               "  -h --help                      Show this help\n"
               "     --default=UNIT              Set default unit\n"
               "     --log-level=LEVEL           Set log level\n"
               "     --log-target=TARGET         Set log target (console, syslog, kmsg)\n"
               "     --running-as=AS             Set running as (init, system, session)\n"
               "     --test                      Determine startup sequence, dump it and exit\n"
               "     --dump-configuration-items  Dump understood unit configuration items\n",
               __progname);

        return 0;
}

int main(int argc, char *argv[]) {
        Manager *m = NULL;
        Unit *target = NULL;
        Job *job = NULL;
        int r, retval = 1;

        if (getpid() == 1)
                running_as = MANAGER_INIT;
        else if (getuid() == 0)
                running_as = MANAGER_SYSTEM;
        else
                running_as = MANAGER_SESSION;

        if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
                goto finish;

        /* Mount /proc, /sys and friends, so that /proc/cmdline and
         * /proc/$PID/fd is available. */
        if (mount_setup() < 0)
                goto finish;

        /* Reset all signal handlers. */
        assert_se(reset_all_signal_handlers() == 0);

        /* Close all open files */
        assert_se(close_all_fds(NULL, 0) == 0);

        if (running_as != MANAGER_SESSION)
                if (parse_proc_cmdline() < 0)
                        goto finish;

        log_parse_environment();

        if (parse_argv(argc, argv) < 0)
                goto finish;

        if (action == ACTION_HELP) {
                retval = help();
                goto finish;
        } else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) {
                unit_dump_config_items(stdout);
                retval = 0;
                goto finish;
        }

        assert_se(action == ACTION_RUN || action == ACTION_TEST);

        /* Set up PATH unless it is already set */
        setenv("PATH",
               "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
               running_as == MANAGER_INIT);

        /* Move out of the way, so that we won't block unmounts */
        assert_se(chdir("/")  == 0);

        /* Become a session leader if we aren't one yet. */
        setsid();

        /* Disable the umask logic */
        umask(0);

        /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
        dbus_connection_set_change_sigpipe(FALSE);

        /* Open the logging devices, if possible and necessary */
        log_open_syslog();
        log_open_kmsg();

        /* Make sure we leave a core dump */
        install_crash_handler();

        log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as));

        if (running_as == MANAGER_INIT)
                hostname_setup();

        if ((r = manager_new(running_as, &m)) < 0) {
                log_error("Failed to allocate manager object: %s", strerror(-r));
                goto finish;
        }

        if ((r = manager_coldplug(m)) < 0) {
                log_error("Failed to retrieve coldplug information: %s", strerror(-r));
                goto finish;
        }

        log_debug("Activating default unit: %s", default_unit);

        if ((r = manager_load_unit(m, default_unit, &target)) < 0) {
                log_error("Failed to load default target: %s", strerror(-r));

                log_info("Trying to load rescue target...");
                if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, &target)) < 0) {
                        log_error("Failed to load rescue target: %s", strerror(-r));
                        goto finish;
                }
        }

        if (action == ACTION_TEST) {
                printf("→ By units:\n");
                manager_dump_units(m, stdout, "\t");
        }

        if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) {
                log_error("Failed to start default target: %s", strerror(-r));
                goto finish;
        }

        if (action == ACTION_TEST) {
                printf("→ By jobs:\n");
                manager_dump_jobs(m, stdout, "\t");

                if (getpid() == 1)
                        pause();

                retval = 0;
                goto finish;
        }

        if ((r = manager_loop(m)) < 0) {
                log_error("Failed to run mainloop: %s", strerror(-r));
                goto finish;
        }

        retval = 0;

        log_debug("Exit.");

finish:
        if (m)
                manager_free(m);

        free(default_unit);

        dbus_shutdown();

        return retval;
}
Commit	Line	Data
60918275 LP	1	/-- Mode: C; c-basic-offset: 8 --/
60918275 LP	2
a7334b09 LP	3	/***
	4	This file is part of systemd.
	5
	6	Copyright 2010 Lennart Poettering
	7
	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.
	12
	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.
	17
	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/>.
	20	***/
	21
ea430986 LP	22	#include <dbus/dbus.h>
ea430986 LP	23
60918275 LP	24	#include <stdio.h>
	25	#include <errno.h>
	26	#include <string.h>
16354eff	27	#include <unistd.h>
4ade7963 LP	28	#include <sys/types.h>
4ade7963 LP	29	#include <sys/stat.h>
f170852a	30	#include <getopt.h>
97c4f35c	31	#include <signal.h>
60918275 LP	32
60918275 LP	33	#include "manager.h"
16354eff	34	#include "log.h"
4ade7963	35	#include "mount-setup.h"
302e8c4c LP	36	#include "hostname-setup.h"
302e8c4c LP	37	#include "load-fragment.h"
60918275	38
f170852a LP	39	static enum {
f170852a LP	40	ACTION_RUN,
e965d56d	41	ACTION_HELP,
e537352b LP	42	ACTION_TEST,
e537352b LP	43	ACTION_DUMP_CONFIGURATION_ITEMS
f170852a LP	44	} action = ACTION_RUN;
	45
	46	static char *default_unit = NULL;
a5dab5ce	47	static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID;
97c4f35c LP	48	static bool dump_core = true;
	49
	50	_noreturn static void freeze(void) {
	51	for (;;)
	52	pause();
	53	}
	54
	55	_noreturn static void crash(int sig) {
	56
	57	if (!dump_core)
	58	log_error("Caught <%s>, not dumping core.", strsignal(sig));
	59	else {
	60	pid_t pid;
	61
	62	log_warning("Caugh <%s>, dumping core.", strsignal(sig));
	63
	64	if ((pid = fork()) < 0)
	65	log_error("Caught <%s>, cannot dump core: %s", strsignal(sig), strerror(errno));
	66
	67	else if (pid == 0) {
	68	struct sigaction sa;
	69	struct rlimit rl;
	70
	71	/* Enable default signal handler for core dump */
	72	zero(sa);
	73	sa.sa_handler = SIG_DFL;
	74	assert_se(sigaction(sig, &sa, NULL) == 0);
	75
	76	/* Don't limit the core dump size */
	77	zero(rl);
	78	rl.rlim_cur = RLIM_INFINITY;
	79	rl.rlim_max = RLIM_INFINITY;
	80	setrlimit(RLIMIT_CORE, &rl);
	81
	82	/* Just to be sure... */
	83	assert_se(chdir("/") == 0);
	84
	85	/* Raise the signal again */
	86	raise(sig);
	87
	88	assert_not_reached("We shouldn't be here...");
	89	_exit(1);
	90	}
	91	}
	92
	93	log_error("Freezing execution.");
	94	freeze();
	95	}
	96
	97	static void install_crash_handler(void) {
	98	struct sigaction sa;
	99
	100	zero(sa);
	101
	102	sa.sa_handler = crash;
	103	sa.sa_flags = SA_NODEFER;
	104
	105	assert_se(sigaction(SIGSEGV, &sa, NULL) == 0);
	106	assert_se(sigaction(SIGABRT, &sa, NULL) == 0);
	107	}
f170852a LP	108
	109	static int set_default_unit(const char *u) {
	110	char *c;
	111
	112	assert(u);
	113
	114	if (!(c = strdup(u)))
	115	return -ENOMEM;
	116
	117	free(default_unit);
	118	default_unit = c;
	119	return 0;
	120	}
	121
	122	static int parse_proc_cmdline_word(const char *word) {
	123
	124	static const char * const rlmap[] = {
	125	"single", SPECIAL_RUNLEVEL1_TARGET,
	126	"-s", SPECIAL_RUNLEVEL1_TARGET,
	127	"s", SPECIAL_RUNLEVEL1_TARGET,
	128	"S", SPECIAL_RUNLEVEL1_TARGET,
	129	"1", SPECIAL_RUNLEVEL1_TARGET,
	130	"2", SPECIAL_RUNLEVEL2_TARGET,
	131	"3", SPECIAL_RUNLEVEL3_TARGET,
	132	"4", SPECIAL_RUNLEVEL4_TARGET,
	133	"5", SPECIAL_RUNLEVEL5_TARGET
	134	};
	135
	136	if (startswith(word, "systemd.default="))
82771ba1	137	return set_default_unit(word + 16);
f170852a LP	138
	139	else if (startswith(word, "systemd.log_target=")) {
	140
	141	if (log_set_target_from_string(word + 19) < 0)
	142	log_warning("Failed to parse log target %s. Ignoring.", word + 19);
	143
	144	} else if (startswith(word, "systemd.log_level=")) {
	145
	146	if (log_set_max_level_from_string(word + 18) < 0)
	147	log_warning("Failed to parse log level %s. Ignoring.", word + 18);
	148
	149	} else {
	150	unsigned i;
	151
	152	/* SysV compatibility */
f170852a LP	153	for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
	154	if (streq(word, rlmap[i]))
	155	return set_default_unit(rlmap[i+1]);
	156	}
	157
	158	return 0;
	159	}
	160
	161	static int parse_proc_cmdline(void) {
	162	char *line;
	163	int r;
	164	char *w;
	165	size_t l;
	166	char *state;
	167
	168	if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
	169	log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno));
	170	return 0;
	171	}
	172
	173	FOREACH_WORD_QUOTED(w, l, line, state) {
	174	char *word;
	175
	176	if (!(word = strndup(w, l))) {
	177	r = -ENOMEM;
	178	goto finish;
	179	}
	180
	181	r = parse_proc_cmdline_word(word);
	182	free(word);
	183
	184	if (r < 0)
	185	goto finish;
	186	}
	187
	188	r = 0;
	189
	190	finish:
	191	free(line);
	192	return r;
	193	}
	194
	195	static int parse_argv(int argc, char *argv[]) {
	196
	197	enum {
	198	ARG_LOG_LEVEL = 0x100,
	199	ARG_LOG_TARGET,
a5dab5ce	200	ARG_DEFAULT,
e965d56d	201	ARG_RUNNING_AS,
e537352b LP	202	ARG_TEST,
e537352b LP	203	ARG_DUMP_CONFIGURATION_ITEMS
f170852a LP	204	};
	205
	206	static const struct option options[] = {
	207	{ "log-level", required_argument, NULL, ARG_LOG_LEVEL },
	208	{ "log-target", required_argument, NULL, ARG_LOG_TARGET },
	209	{ "default", required_argument, NULL, ARG_DEFAULT },
a5dab5ce	210	{ "running-as", required_argument, NULL, ARG_RUNNING_AS },
e965d56d	211	{ "test", no_argument, NULL, ARG_TEST },
f170852a	212	{ "help", no_argument, NULL, 'h' },
e537352b	213	{ "dump-configuration-items", no_argument, NULL, ARG_DUMP_CONFIGURATION_ITEMS },
f170852a LP	214	{ NULL, 0, NULL, 0 }
	215	};
	216
	217	int c, r;
	218
	219	assert(argc >= 1);
	220	assert(argv);
	221
	222	while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
	223
	224	switch (c) {
	225
	226	case ARG_LOG_LEVEL:
	227	if ((r = log_set_max_level_from_string(optarg)) < 0) {
	228	log_error("Failed to parse log level %s.", optarg);
	229	return r;
	230	}
	231
	232	break;
	233
	234	case ARG_LOG_TARGET:
	235
	236	if ((r = log_set_target_from_string(optarg)) < 0) {
	237	log_error("Failed to parse log target %s.", optarg);
	238	return r;
	239	}
	240
	241	break;
	242
	243	case ARG_DEFAULT:
	244
	245	if ((r = set_default_unit(optarg)) < 0) {
	246	log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
	247	return r;
	248	}
	249
	250	break;
	251
a5dab5ce LP	252	case ARG_RUNNING_AS: {
	253	ManagerRunningAs as;
	254
	255	if ((as = manager_running_as_from_string(optarg)) < 0) {
	256	log_error("Failed to parse running as value %s", optarg);
	257	return -EINVAL;
	258	}
	259
	260	running_as = as;
	261	break;
	262	}
	263
e965d56d LP	264	case ARG_TEST:
	265	action = ACTION_TEST;
	266	break;
	267
e537352b LP	268	case ARG_DUMP_CONFIGURATION_ITEMS:
	269	action = ACTION_DUMP_CONFIGURATION_ITEMS;
	270	break;
	271
f170852a LP	272	case 'h':
	273	action = ACTION_HELP;
	274	break;
	275
	276	case '?':
	277	return -EINVAL;
	278
	279	default:
	280	log_error("Unknown option code %c", c);
	281	return -EINVAL;
	282	}
	283
f170852a LP	284	return 0;
	285	}
	286
	287	static int help(void) {
	288
	289	printf("%s [options]\n\n"
e537352b LP	290	" -h --help Show this help\n"
	291	" --default=UNIT Set default unit\n"
	292	" --log-level=LEVEL Set log level\n"
	293	" --log-target=TARGET Set log target (console, syslog, kmsg)\n"
	294	" --running-as=AS Set running as (init, system, session)\n"
	295	" --test Determine startup sequence, dump it and exit\n"
	296	" --dump-configuration-items Dump understood unit configuration items\n",
f170852a LP	297	__progname);
	298
	299	return 0;
	300	}
	301
60918275 LP	302	int main(int argc, char *argv[]) {
60918275 LP	303	Manager *m = NULL;
87f0e418	304	Unit *target = NULL;
60918275 LP	305	Job *job = NULL;
60918275 LP	306	int r, retval = 1;
27b14a22	307
a5dab5ce LP	308	if (getpid() == 1)
	309	running_as = MANAGER_INIT;
	310	else if (getuid() == 0)
	311	running_as = MANAGER_SYSTEM;
	312	else
	313	running_as = MANAGER_SESSION;
	314
f170852a LP	315	if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
f170852a LP	316	goto finish;
60918275	317
f170852a LP	318	/* Mount /proc, /sys and friends, so that /proc/cmdline and
f170852a LP	319	* /proc/$PID/fd is available. */
d89e521e LP	320	if (mount_setup() < 0)
d89e521e LP	321	goto finish;
4ade7963 LP	322
	323	/* Reset all signal handlers. */
	324	assert_se(reset_all_signal_handlers() == 0);
	325
f170852a LP	326	/* Close all open files */
	327	assert_se(close_all_fds(NULL, 0) == 0);
	328
a5dab5ce LP	329	if (running_as != MANAGER_SESSION)
	330	if (parse_proc_cmdline() < 0)
	331	goto finish;
f170852a LP	332
	333	log_parse_environment();
	334
	335	if (parse_argv(argc, argv) < 0)
	336	goto finish;
	337
	338	if (action == ACTION_HELP) {
	339	retval = help();
	340	goto finish;
e537352b LP	341	} else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) {
	342	unit_dump_config_items(stdout);
	343	retval = 0;
	344	goto finish;
f170852a LP	345	}
f170852a LP	346
e965d56d	347	assert_se(action == ACTION_RUN \|\| action == ACTION_TEST);
f170852a	348
09082a94	349	/* Set up PATH unless it is already set */
e537352b LP	350	setenv("PATH",
	351	"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
	352	running_as == MANAGER_INIT);
09082a94	353
f170852a LP	354	/* Move out of the way, so that we won't block unmounts */
	355	assert_se(chdir("/") == 0);
	356
4ade7963 LP	357	/* Become a session leader if we aren't one yet. */
	358	setsid();
	359
	360	/* Disable the umask logic */
	361	umask(0);
	362
	363	/* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
	364	dbus_connection_set_change_sigpipe(FALSE);
	365
18149b9f	366	/* Open the logging devices, if possible and necessary */
4ade7963 LP	367	log_open_syslog();
	368	log_open_kmsg();
	369
18149b9f	370	/* Make sure we leave a core dump */
97c4f35c	371	install_crash_handler();
97c4f35c	372
a5dab5ce LP	373	log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as));
a5dab5ce LP	374
302e8c4c	375	if (running_as == MANAGER_INIT)
e537352b	376	hostname_setup();
302e8c4c	377
a5dab5ce	378	if ((r = manager_new(running_as, &m)) < 0) {
8e274523	379	log_error("Failed to allocate manager object: %s", strerror(-r));
60918275 LP	380	goto finish;
	381	}
	382
f50e0a01 LP	383	if ((r = manager_coldplug(m)) < 0) {
	384	log_error("Failed to retrieve coldplug information: %s", strerror(-r));
	385	goto finish;
	386	}
	387
27b14a22 LP	388	log_debug("Activating default unit: %s", default_unit);
	389
	390	if ((r = manager_load_unit(m, default_unit, &target)) < 0) {
c22cbe26	391	log_error("Failed to load default target: %s", strerror(-r));
37d88da7 LP	392
	393	log_info("Trying to load rescue target...");
	394	if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, &target)) < 0) {
	395	log_error("Failed to load rescue target: %s", strerror(-r));
	396	goto finish;
	397	}
60918275 LP	398	}
60918275 LP	399
e965d56d LP	400	if (action == ACTION_TEST) {
	401	printf("→ By units:\n");
	402	manager_dump_units(m, stdout, "\t");
	403	}
d46de8a1	404
8f5847c4 LP	405	if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) {
	406	log_error("Failed to start default target: %s", strerror(-r));
	407	goto finish;
	408	}
11dd41ce	409
e965d56d LP	410	if (action == ACTION_TEST) {
	411	printf("→ By jobs:\n");
	412	manager_dump_jobs(m, stdout, "\t");
	413
	414	if (getpid() == 1)
	415	pause();
	416
	417	retval = 0;
	418	goto finish;
	419	}
cea8e32e	420
c20cae32 LP	421	if ((r = manager_loop(m)) < 0) {
	422	log_error("Failed to run mainloop: %s", strerror(-r));
	423	goto finish;
	424	}
9152c765	425
60918275 LP	426	retval = 0;
60918275 LP	427
f170852a LP	428	log_debug("Exit.");
f170852a LP	429
60918275 LP	430	finish:
	431	if (m)
	432	manager_free(m);
	433
f170852a	434	free(default_unit);
b9cd2ec1	435
ea430986 LP	436	dbus_shutdown();
ea430986 LP	437
60918275 LP	438	return retval;
60918275 LP	439	}