1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
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 "mount-setup.h"
35 #include "hostname-setup.h"
36 #include "load-fragment.h"
42 } action = ACTION_RUN;
44 static char *default_unit = NULL;
45 static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID;
47 static int set_default_unit(const char *u) {
60 static int parse_proc_cmdline_word(const char *word) {
62 static const char * const rlmap[] = {
63 "single", SPECIAL_RUNLEVEL1_TARGET,
64 "-s", SPECIAL_RUNLEVEL1_TARGET,
65 "s", SPECIAL_RUNLEVEL1_TARGET,
66 "S", SPECIAL_RUNLEVEL1_TARGET,
67 "1", SPECIAL_RUNLEVEL1_TARGET,
68 "2", SPECIAL_RUNLEVEL2_TARGET,
69 "3", SPECIAL_RUNLEVEL3_TARGET,
70 "4", SPECIAL_RUNLEVEL4_TARGET,
71 "5", SPECIAL_RUNLEVEL5_TARGET
74 if (startswith(word, "systemd.default="))
75 return set_default_unit(word + 16);
77 else if (startswith(word, "systemd.log_target=")) {
79 if (log_set_target_from_string(word + 19) < 0)
80 log_warning("Failed to parse log target %s. Ignoring.", word + 19);
82 } else if (startswith(word, "systemd.log_level=")) {
84 if (log_set_max_level_from_string(word + 18) < 0)
85 log_warning("Failed to parse log level %s. Ignoring.", word + 18);
90 /* SysV compatibility */
92 for (i = 0; i < ELEMENTSOF(rlmap); i += 2)
93 if (streq(word, rlmap[i]))
94 return set_default_unit(rlmap[i+1]);
100 static int parse_proc_cmdline(void) {
107 if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) {
108 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno));
112 FOREACH_WORD_QUOTED(w, l, line, state) {
115 if (!(word = strndup(w, l))) {
120 r = parse_proc_cmdline_word(word);
134 static int parse_argv(int argc, char *argv[]) {
137 ARG_LOG_LEVEL = 0x100,
144 static const struct option options[] = {
145 { "log-level", required_argument, NULL, ARG_LOG_LEVEL },
146 { "log-target", required_argument, NULL, ARG_LOG_TARGET },
147 { "default", required_argument, NULL, ARG_DEFAULT },
148 { "running-as", required_argument, NULL, ARG_RUNNING_AS },
149 { "test", no_argument, NULL, ARG_TEST },
150 { "help", no_argument, NULL, 'h' },
159 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
164 if ((r = log_set_max_level_from_string(optarg)) < 0) {
165 log_error("Failed to parse log level %s.", optarg);
173 if ((r = log_set_target_from_string(optarg)) < 0) {
174 log_error("Failed to parse log target %s.", optarg);
182 if ((r = set_default_unit(optarg)) < 0) {
183 log_error("Failed to set default unit %s: %s", optarg, strerror(-r));
189 case ARG_RUNNING_AS: {
192 if ((as = manager_running_as_from_string(optarg)) < 0) {
193 log_error("Failed to parse running as value %s", optarg);
202 action = ACTION_TEST;
206 action = ACTION_HELP;
213 log_error("Unknown option code %c", c);
220 static int help(void) {
222 printf("%s [options]\n\n"
223 " -h --help Show this help\n"
224 " --default=UNIT Set default unit\n"
225 " --log-level=LEVEL Set log level\n"
226 " --log-target=TARGET Set log target (console, syslog, kmsg)\n"
227 " --running-as=AS Set running as (init, system, session)\n"
228 " --test Determine startup sequence, dump it and exit\n",
234 int main(int argc, char *argv[]) {
241 running_as = MANAGER_INIT;
242 else if (getuid() == 0)
243 running_as = MANAGER_SYSTEM;
245 running_as = MANAGER_SESSION;
247 if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0)
250 /* Mount /proc, /sys and friends, so that /proc/cmdline and
251 * /proc/$PID/fd is available. */
252 if (mount_setup() < 0)
255 /* Reset all signal handlers. */
256 assert_se(reset_all_signal_handlers() == 0);
258 /* Close all open files */
259 assert_se(close_all_fds(NULL, 0) == 0);
261 if (running_as != MANAGER_SESSION)
262 if (parse_proc_cmdline() < 0)
265 log_parse_environment();
267 if (parse_argv(argc, argv) < 0)
270 if (action == ACTION_HELP) {
275 assert_se(action == ACTION_RUN || action == ACTION_TEST);
277 /* Set up PATH unless it is already set */
278 setenv("PATH", "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin", false);
280 /* Move out of the way, so that we won't block unmounts */
281 assert_se(chdir("/") == 0);
283 /* Become a session leader if we aren't one yet. */
286 /* Disable the umask logic */
289 /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */
290 dbus_connection_set_change_sigpipe(FALSE);
292 /* Open the logging devices, if possible and necessary*/
296 log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as));
298 if (running_as == MANAGER_INIT)
299 if (hostname_setup() < 0)
302 if ((r = manager_new(running_as, &m)) < 0) {
303 log_error("Failed to allocate manager object: %s", strerror(-r));
307 if ((r = manager_coldplug(m)) < 0) {
308 log_error("Failed to retrieve coldplug information: %s", strerror(-r));
312 log_debug("Activating default unit: %s", default_unit);
314 if ((r = manager_load_unit(m, default_unit, &target)) < 0) {
315 log_error("Failed to load default target: %s", strerror(-r));
317 log_info("Trying to load rescue target...");
318 if ((r = manager_load_unit(m, SPECIAL_RESCUE_TARGET, &target)) < 0) {
319 log_error("Failed to load rescue target: %s", strerror(-r));
324 if (action == ACTION_TEST) {
325 printf("→ By units:\n");
326 manager_dump_units(m, stdout, "\t");
329 if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) {
330 log_error("Failed to start default target: %s", strerror(-r));
334 if (action == ACTION_TEST) {
335 printf("→ By jobs:\n");
336 manager_dump_jobs(m, stdout, "\t");
345 if ((r = manager_loop(m)) < 0) {
346 log_error("Failed to run mainloop: %s", strerror(-r));