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60918275 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
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> |
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> |
29 | #include <sys/stat.h> | |
f170852a | 30 | #include <getopt.h> |
60918275 LP |
31 | |
32 | #include "manager.h" | |
16354eff | 33 | #include "log.h" |
4ade7963 | 34 | #include "mount-setup.h" |
60918275 | 35 | |
f170852a LP |
36 | static enum { |
37 | ACTION_RUN, | |
38 | ACTION_HELP | |
39 | } action = ACTION_RUN; | |
40 | ||
41 | static char *default_unit = NULL; | |
a5dab5ce | 42 | static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID; |
f170852a LP |
43 | |
44 | static int set_default_unit(const char *u) { | |
45 | char *c; | |
46 | ||
47 | assert(u); | |
48 | ||
49 | if (!(c = strdup(u))) | |
50 | return -ENOMEM; | |
51 | ||
52 | free(default_unit); | |
53 | default_unit = c; | |
54 | return 0; | |
55 | } | |
56 | ||
57 | static int parse_proc_cmdline_word(const char *word) { | |
58 | ||
59 | static const char * const rlmap[] = { | |
60 | "single", SPECIAL_RUNLEVEL1_TARGET, | |
61 | "-s", SPECIAL_RUNLEVEL1_TARGET, | |
62 | "s", SPECIAL_RUNLEVEL1_TARGET, | |
63 | "S", SPECIAL_RUNLEVEL1_TARGET, | |
64 | "1", SPECIAL_RUNLEVEL1_TARGET, | |
65 | "2", SPECIAL_RUNLEVEL2_TARGET, | |
66 | "3", SPECIAL_RUNLEVEL3_TARGET, | |
67 | "4", SPECIAL_RUNLEVEL4_TARGET, | |
68 | "5", SPECIAL_RUNLEVEL5_TARGET | |
69 | }; | |
70 | ||
71 | if (startswith(word, "systemd.default=")) | |
72 | return set_default_unit(word + 15); | |
73 | ||
74 | else if (startswith(word, "systemd.log_target=")) { | |
75 | ||
76 | if (log_set_target_from_string(word + 19) < 0) | |
77 | log_warning("Failed to parse log target %s. Ignoring.", word + 19); | |
78 | ||
79 | } else if (startswith(word, "systemd.log_level=")) { | |
80 | ||
81 | if (log_set_max_level_from_string(word + 18) < 0) | |
82 | log_warning("Failed to parse log level %s. Ignoring.", word + 18); | |
83 | ||
84 | } else { | |
85 | unsigned i; | |
86 | ||
87 | /* SysV compatibility */ | |
88 | ||
89 | for (i = 0; i < ELEMENTSOF(rlmap); i += 2) | |
90 | if (streq(word, rlmap[i])) | |
91 | return set_default_unit(rlmap[i+1]); | |
92 | } | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static int parse_proc_cmdline(void) { | |
98 | char *line; | |
99 | int r; | |
100 | char *w; | |
101 | size_t l; | |
102 | char *state; | |
103 | ||
104 | if ((r = read_one_line_file("/proc/cmdline", &line)) < 0) { | |
105 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(errno)); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
110 | char *word; | |
111 | ||
112 | if (!(word = strndup(w, l))) { | |
113 | r = -ENOMEM; | |
114 | goto finish; | |
115 | } | |
116 | ||
117 | r = parse_proc_cmdline_word(word); | |
118 | free(word); | |
119 | ||
120 | if (r < 0) | |
121 | goto finish; | |
122 | } | |
123 | ||
124 | r = 0; | |
125 | ||
126 | finish: | |
127 | free(line); | |
128 | return r; | |
129 | } | |
130 | ||
131 | static int parse_argv(int argc, char *argv[]) { | |
132 | ||
133 | enum { | |
134 | ARG_LOG_LEVEL = 0x100, | |
135 | ARG_LOG_TARGET, | |
a5dab5ce LP |
136 | ARG_DEFAULT, |
137 | ARG_RUNNING_AS | |
f170852a LP |
138 | }; |
139 | ||
140 | static const struct option options[] = { | |
141 | { "log-level", required_argument, NULL, ARG_LOG_LEVEL }, | |
142 | { "log-target", required_argument, NULL, ARG_LOG_TARGET }, | |
143 | { "default", required_argument, NULL, ARG_DEFAULT }, | |
a5dab5ce | 144 | { "running-as", required_argument, NULL, ARG_RUNNING_AS }, |
f170852a LP |
145 | { "help", no_argument, NULL, 'h' }, |
146 | { NULL, 0, NULL, 0 } | |
147 | }; | |
148 | ||
149 | int c, r; | |
150 | ||
151 | assert(argc >= 1); | |
152 | assert(argv); | |
153 | ||
154 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
155 | ||
156 | switch (c) { | |
157 | ||
158 | case ARG_LOG_LEVEL: | |
159 | if ((r = log_set_max_level_from_string(optarg)) < 0) { | |
160 | log_error("Failed to parse log level %s.", optarg); | |
161 | return r; | |
162 | } | |
163 | ||
164 | break; | |
165 | ||
166 | case ARG_LOG_TARGET: | |
167 | ||
168 | if ((r = log_set_target_from_string(optarg)) < 0) { | |
169 | log_error("Failed to parse log target %s.", optarg); | |
170 | return r; | |
171 | } | |
172 | ||
173 | break; | |
174 | ||
175 | case ARG_DEFAULT: | |
176 | ||
177 | if ((r = set_default_unit(optarg)) < 0) { | |
178 | log_error("Failed to set default unit %s: %s", optarg, strerror(-r)); | |
179 | return r; | |
180 | } | |
181 | ||
182 | break; | |
183 | ||
a5dab5ce LP |
184 | case ARG_RUNNING_AS: { |
185 | ManagerRunningAs as; | |
186 | ||
187 | if ((as = manager_running_as_from_string(optarg)) < 0) { | |
188 | log_error("Failed to parse running as value %s", optarg); | |
189 | return -EINVAL; | |
190 | } | |
191 | ||
192 | running_as = as; | |
193 | break; | |
194 | } | |
195 | ||
f170852a LP |
196 | case 'h': |
197 | action = ACTION_HELP; | |
198 | break; | |
199 | ||
200 | case '?': | |
201 | return -EINVAL; | |
202 | ||
203 | default: | |
204 | log_error("Unknown option code %c", c); | |
205 | return -EINVAL; | |
206 | } | |
207 | ||
208 | if (optind < argc) { | |
209 | log_error("Too many arguments."); | |
210 | return -EINVAL; | |
211 | } | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static int help(void) { | |
217 | ||
218 | printf("%s [options]\n\n" | |
219 | " -h --help Show this help\n" | |
220 | " --default=UNIT Set default unit\n" | |
221 | " --log-level=LEVEL Set log level\n" | |
a5dab5ce LP |
222 | " --log-target=TARGET Set log target (console, syslog, kmsg)\n" |
223 | " --running-as=AS Set running as (init, system, sesstion)\n", | |
f170852a LP |
224 | __progname); |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
60918275 LP |
229 | int main(int argc, char *argv[]) { |
230 | Manager *m = NULL; | |
87f0e418 | 231 | Unit *target = NULL; |
60918275 LP |
232 | Job *job = NULL; |
233 | int r, retval = 1; | |
27b14a22 | 234 | |
a5dab5ce LP |
235 | if (getpid() == 1) |
236 | running_as = MANAGER_INIT; | |
237 | else if (getuid() == 0) | |
238 | running_as = MANAGER_SYSTEM; | |
239 | else | |
240 | running_as = MANAGER_SESSION; | |
241 | ||
f170852a LP |
242 | if (set_default_unit(SPECIAL_DEFAULT_TARGET) < 0) |
243 | goto finish; | |
60918275 | 244 | |
f170852a LP |
245 | /* Mount /proc, /sys and friends, so that /proc/cmdline and |
246 | * /proc/$PID/fd is available. */ | |
247 | mount_setup(); | |
4ade7963 LP |
248 | |
249 | /* Reset all signal handlers. */ | |
250 | assert_se(reset_all_signal_handlers() == 0); | |
251 | ||
f170852a LP |
252 | /* Close all open files */ |
253 | assert_se(close_all_fds(NULL, 0) == 0); | |
254 | ||
a5dab5ce LP |
255 | if (running_as != MANAGER_SESSION) |
256 | if (parse_proc_cmdline() < 0) | |
257 | goto finish; | |
f170852a LP |
258 | |
259 | log_parse_environment(); | |
260 | ||
261 | if (parse_argv(argc, argv) < 0) | |
262 | goto finish; | |
263 | ||
264 | if (action == ACTION_HELP) { | |
265 | retval = help(); | |
266 | goto finish; | |
267 | } | |
268 | ||
269 | assert_se(action == ACTION_RUN); | |
270 | ||
271 | /* Move out of the way, so that we won't block unmounts */ | |
272 | assert_se(chdir("/") == 0); | |
273 | ||
4ade7963 LP |
274 | /* Become a session leader if we aren't one yet. */ |
275 | setsid(); | |
276 | ||
277 | /* Disable the umask logic */ | |
278 | umask(0); | |
279 | ||
280 | /* Make sure D-Bus doesn't fiddle with the SIGPIPE handlers */ | |
281 | dbus_connection_set_change_sigpipe(FALSE); | |
282 | ||
4ade7963 LP |
283 | /* Open the logging devices, if possible and necessary*/ |
284 | log_open_syslog(); | |
285 | log_open_kmsg(); | |
286 | ||
a5dab5ce LP |
287 | log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as)); |
288 | ||
289 | if ((r = manager_new(running_as, &m)) < 0) { | |
8e274523 | 290 | log_error("Failed to allocate manager object: %s", strerror(-r)); |
60918275 LP |
291 | goto finish; |
292 | } | |
293 | ||
f50e0a01 LP |
294 | if ((r = manager_coldplug(m)) < 0) { |
295 | log_error("Failed to retrieve coldplug information: %s", strerror(-r)); | |
296 | goto finish; | |
297 | } | |
298 | ||
27b14a22 LP |
299 | log_debug("Activating default unit: %s", default_unit); |
300 | ||
301 | if ((r = manager_load_unit(m, default_unit, &target)) < 0) { | |
c22cbe26 | 302 | log_error("Failed to load default target: %s", strerror(-r)); |
60918275 LP |
303 | goto finish; |
304 | } | |
305 | ||
d46de8a1 LP |
306 | printf("→ By units:\n"); |
307 | manager_dump_units(m, stdout, "\t"); | |
308 | ||
8f5847c4 LP |
309 | if ((r = manager_add_job(m, JOB_START, target, JOB_REPLACE, false, &job)) < 0) { |
310 | log_error("Failed to start default target: %s", strerror(-r)); | |
311 | goto finish; | |
312 | } | |
11dd41ce | 313 | |
44d8db9e | 314 | printf("→ By jobs:\n"); |
cea8e32e LP |
315 | manager_dump_jobs(m, stdout, "\t"); |
316 | ||
c20cae32 LP |
317 | if ((r = manager_loop(m)) < 0) { |
318 | log_error("Failed to run mainloop: %s", strerror(-r)); | |
319 | goto finish; | |
320 | } | |
9152c765 | 321 | |
60918275 LP |
322 | retval = 0; |
323 | ||
f170852a LP |
324 | log_debug("Exit."); |
325 | ||
60918275 LP |
326 | finish: |
327 | if (m) | |
328 | manager_free(m); | |
329 | ||
f170852a | 330 | free(default_unit); |
b9cd2ec1 | 331 | |
ea430986 LP |
332 | dbus_shutdown(); |
333 | ||
60918275 LP |
334 | return retval; |
335 | } |