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Commit | Line | Data |
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5cb5a6ff LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
3 | #include <errno.h> | |
034c6ed7 | 4 | #include <signal.h> |
5cb5a6ff | 5 | |
87f0e418 | 6 | #include "unit.h" |
5cb5a6ff LP |
7 | #include "service.h" |
8 | #include "load-fragment.h" | |
9 | #include "load-dropin.h" | |
034c6ed7 LP |
10 | #include "log.h" |
11 | ||
acbb0225 | 12 | static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { |
87f0e418 LP |
13 | [SERVICE_DEAD] = UNIT_INACTIVE, |
14 | [SERVICE_START_PRE] = UNIT_ACTIVATING, | |
15 | [SERVICE_START] = UNIT_ACTIVATING, | |
16 | [SERVICE_START_POST] = UNIT_ACTIVATING, | |
17 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
18 | [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING, | |
19 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
20 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
21 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
22 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
23 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
24 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
25 | [SERVICE_MAINTAINANCE] = UNIT_INACTIVE, | |
26 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING, | |
034c6ed7 | 27 | }; |
5cb5a6ff | 28 | |
87f0e418 LP |
29 | static void service_done(Unit *u) { |
30 | Service *s = SERVICE(u); | |
44d8db9e LP |
31 | |
32 | assert(s); | |
33 | ||
34 | free(s->pid_file); | |
35 | s->pid_file = NULL; | |
36 | ||
37 | exec_context_done(&s->exec_context); | |
38 | exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX); | |
39 | s->control_command = NULL; | |
40 | ||
41 | /* This will leak a process, but at least no memory or any of | |
42 | * our resources */ | |
43 | if (s->main_pid > 0) { | |
87f0e418 | 44 | unit_unwatch_pid(u, s->main_pid); |
44d8db9e LP |
45 | s->main_pid = 0; |
46 | } | |
47 | ||
48 | if (s->control_pid > 0) { | |
87f0e418 | 49 | unit_unwatch_pid(u, s->control_pid); |
44d8db9e LP |
50 | s->control_pid = 0; |
51 | } | |
52 | ||
acbb0225 | 53 | unit_unwatch_timer(u, &s->timer_watch); |
44d8db9e LP |
54 | } |
55 | ||
5cb5a6ff LP |
56 | static int service_load_sysv(Service *s) { |
57 | assert(s); | |
58 | ||
59 | /* Load service data from SysV init scripts, preferably with | |
60 | * LSB headers ... */ | |
61 | ||
62 | return -ENOENT; | |
63 | } | |
64 | ||
87f0e418 | 65 | static int service_init(Unit *u) { |
5cb5a6ff | 66 | int r; |
87f0e418 | 67 | Service *s = SERVICE(u); |
5cb5a6ff LP |
68 | |
69 | assert(s); | |
70 | ||
034c6ed7 LP |
71 | /* First, reset everything to the defaults, in case this is a |
72 | * reload */ | |
73 | ||
74 | s->type = 0; | |
75 | s->restart = 0; | |
76 | ||
77 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
78 | s->restart_usec = DEFAULT_RESTART_USEC; | |
79 | ||
80 | exec_context_init(&s->exec_context); | |
81 | ||
acbb0225 | 82 | s->timer_watch.type = WATCH_INVALID; |
034c6ed7 LP |
83 | |
84 | s->state = SERVICE_DEAD; | |
5cb5a6ff | 85 | |
1e2e8133 LP |
86 | RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5); |
87 | ||
5cb5a6ff | 88 | /* Load a .service file */ |
d46de8a1 | 89 | if ((r = unit_load_fragment(u)) < 0) { |
87f0e418 | 90 | service_done(u); |
5cb5a6ff | 91 | return r; |
44d8db9e | 92 | } |
5cb5a6ff | 93 | |
d46de8a1 LP |
94 | /* Load a classic init script as a fallback, if we couldn*t find anything */ |
95 | if (r == 0) | |
96 | if ((r = service_load_sysv(s)) <= 0) { | |
97 | service_done(u); | |
98 | return r < 0 ? r : -ENOENT; | |
99 | } | |
100 | ||
5cb5a6ff | 101 | /* Load dropin directory data */ |
87f0e418 LP |
102 | if ((r = unit_load_dropin(u)) < 0) { |
103 | service_done(u); | |
5cb5a6ff | 104 | return r; |
034c6ed7 LP |
105 | } |
106 | ||
44d8db9e | 107 | return 0; |
034c6ed7 LP |
108 | } |
109 | ||
87f0e418 | 110 | static void service_dump(Unit *u, FILE *f, const char *prefix) { |
5cb5a6ff | 111 | |
5cb5a6ff | 112 | ServiceExecCommand c; |
87f0e418 | 113 | Service *s = SERVICE(u); |
44d8db9e | 114 | char *prefix2; |
5cb5a6ff LP |
115 | |
116 | assert(s); | |
117 | ||
44d8db9e LP |
118 | prefix2 = strappend(prefix, "\t"); |
119 | if (!prefix2) | |
120 | prefix2 = ""; | |
121 | ||
5cb5a6ff LP |
122 | fprintf(f, |
123 | "%sService State: %s\n", | |
94f04347 | 124 | prefix, service_state_to_string(s->state)); |
5cb5a6ff | 125 | |
034c6ed7 LP |
126 | if (s->pid_file) |
127 | fprintf(f, | |
128 | "%sPIDFile: %s\n", | |
129 | prefix, s->pid_file); | |
130 | ||
131 | ||
5cb5a6ff LP |
132 | exec_context_dump(&s->exec_context, f, prefix); |
133 | ||
134 | for (c = 0; c < _SERVICE_EXEC_MAX; c++) { | |
5cb5a6ff | 135 | |
44d8db9e LP |
136 | if (!s->exec_command[c]) |
137 | continue; | |
138 | ||
139 | fprintf(f, "%s→ %s:\n", | |
94f04347 | 140 | prefix, service_exec_command_to_string(c)); |
44d8db9e LP |
141 | |
142 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
5cb5a6ff | 143 | } |
44d8db9e LP |
144 | |
145 | free(prefix2); | |
5cb5a6ff LP |
146 | } |
147 | ||
034c6ed7 LP |
148 | static int service_load_pid_file(Service *s) { |
149 | char *k; | |
150 | unsigned long p; | |
151 | int r; | |
152 | ||
153 | assert(s); | |
154 | ||
155 | if (s->main_pid_known) | |
156 | return 0; | |
157 | ||
158 | if (!s->pid_file) | |
159 | return -ENOENT; | |
160 | ||
161 | if ((r = read_one_line_file(s->pid_file, &k)) < 0) | |
162 | return r; | |
163 | ||
164 | if ((r = safe_atolu(k, &p)) < 0) { | |
165 | free(k); | |
166 | return r; | |
167 | } | |
168 | ||
169 | if ((unsigned long) (pid_t) p != p) | |
170 | return -ERANGE; | |
171 | ||
172 | s->main_pid = p; | |
173 | s->main_pid_known = true; | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
3e33402a LP |
178 | static int service_get_sockets(Service *s, Set **_set) { |
179 | Set *set; | |
ceee3d82 LP |
180 | Iterator i; |
181 | char *t; | |
3e33402a | 182 | int r; |
ceee3d82 LP |
183 | |
184 | assert(s); | |
3e33402a LP |
185 | assert(_set); |
186 | ||
187 | /* Collects all Socket objects that belong to this | |
188 | * service. Note that a service might have multiple sockets | |
189 | * via multiple names. */ | |
190 | ||
191 | if (!(set = set_new(NULL, NULL))) | |
192 | return -ENOMEM; | |
ceee3d82 LP |
193 | |
194 | SET_FOREACH(t, UNIT(s)->meta.names, i) { | |
195 | char *k; | |
196 | Unit *p; | |
197 | ||
198 | /* Look for all socket objects that go by any of our | |
199 | * units and collect their fds */ | |
200 | ||
3e33402a LP |
201 | if (!(k = unit_name_change_suffix(t, ".socket"))) { |
202 | r = -ENOMEM; | |
203 | goto fail; | |
204 | } | |
ceee3d82 LP |
205 | |
206 | p = manager_get_unit(UNIT(s)->meta.manager, k); | |
207 | free(k); | |
208 | ||
3e33402a | 209 | if (!p) continue; |
ceee3d82 | 210 | |
3e33402a LP |
211 | if ((r = set_put(set, p)) < 0) |
212 | goto fail; | |
ceee3d82 LP |
213 | } |
214 | ||
3e33402a LP |
215 | *_set = set; |
216 | return 0; | |
217 | ||
218 | fail: | |
219 | set_free(set); | |
220 | return r; | |
221 | } | |
222 | ||
223 | ||
224 | static int service_notify_sockets(Service *s) { | |
225 | Iterator i; | |
226 | Set *set; | |
227 | Socket *socket; | |
228 | int r; | |
229 | ||
230 | assert(s); | |
231 | ||
232 | /* Notifies all our sockets when we die */ | |
233 | ||
234 | if ((r = service_get_sockets(s, &set)) < 0) | |
235 | return r; | |
236 | ||
237 | SET_FOREACH(socket, set, i) | |
238 | socket_notify_service_dead(socket); | |
239 | ||
240 | set_free(set); | |
241 | ||
ceee3d82 LP |
242 | return 0; |
243 | } | |
244 | ||
034c6ed7 LP |
245 | static void service_set_state(Service *s, ServiceState state) { |
246 | ServiceState old_state; | |
5cb5a6ff LP |
247 | assert(s); |
248 | ||
034c6ed7 | 249 | old_state = s->state; |
5cb5a6ff | 250 | s->state = state; |
034c6ed7 LP |
251 | |
252 | if (state != SERVICE_START_PRE && | |
253 | state != SERVICE_START && | |
254 | state != SERVICE_START_POST && | |
255 | state != SERVICE_RELOAD && | |
256 | state != SERVICE_STOP && | |
257 | state != SERVICE_STOP_SIGTERM && | |
258 | state != SERVICE_STOP_SIGKILL && | |
259 | state != SERVICE_STOP_POST && | |
260 | state != SERVICE_FINAL_SIGTERM && | |
261 | state != SERVICE_FINAL_SIGKILL && | |
262 | state != SERVICE_AUTO_RESTART) | |
acbb0225 | 263 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
264 | |
265 | if (state != SERVICE_START_POST && | |
266 | state != SERVICE_RUNNING && | |
267 | state != SERVICE_RELOAD && | |
268 | state != SERVICE_STOP && | |
269 | state != SERVICE_STOP_SIGTERM && | |
270 | state != SERVICE_STOP_SIGKILL) | |
acbb0225 | 271 | if (s->main_pid > 0) { |
87f0e418 | 272 | unit_unwatch_pid(UNIT(s), s->main_pid); |
034c6ed7 LP |
273 | s->main_pid = 0; |
274 | } | |
275 | ||
276 | if (state != SERVICE_START_PRE && | |
277 | state != SERVICE_START && | |
278 | state != SERVICE_START_POST && | |
279 | state != SERVICE_RELOAD && | |
280 | state != SERVICE_STOP && | |
281 | state != SERVICE_STOP_SIGTERM && | |
282 | state != SERVICE_STOP_SIGKILL && | |
283 | state != SERVICE_STOP_POST && | |
284 | state != SERVICE_FINAL_SIGTERM && | |
285 | state != SERVICE_FINAL_SIGKILL) | |
acbb0225 | 286 | if (s->control_pid > 0) { |
87f0e418 | 287 | unit_unwatch_pid(UNIT(s), s->control_pid); |
034c6ed7 LP |
288 | s->control_pid = 0; |
289 | } | |
290 | ||
291 | if (state != SERVICE_START_PRE && | |
292 | state != SERVICE_START && | |
293 | state != SERVICE_START_POST && | |
294 | state != SERVICE_RELOAD && | |
295 | state != SERVICE_STOP && | |
296 | state != SERVICE_STOP_POST) | |
297 | s->control_command = NULL; | |
298 | ||
ceee3d82 LP |
299 | if (state == SERVICE_DEAD || |
300 | state == SERVICE_STOP || | |
301 | state == SERVICE_STOP_SIGTERM || | |
302 | state == SERVICE_STOP_SIGKILL || | |
303 | state == SERVICE_STOP_POST || | |
304 | state == SERVICE_FINAL_SIGTERM || | |
305 | state == SERVICE_FINAL_SIGKILL || | |
306 | state == SERVICE_MAINTAINANCE || | |
307 | state == SERVICE_AUTO_RESTART) | |
308 | service_notify_sockets(s); | |
309 | ||
94f04347 | 310 | log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state)); |
acbb0225 LP |
311 | |
312 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
034c6ed7 LP |
313 | } |
314 | ||
44d8db9e LP |
315 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { |
316 | Iterator i; | |
317 | int r; | |
318 | int *rfds = NULL; | |
319 | unsigned rn_fds = 0; | |
3e33402a LP |
320 | Set *set; |
321 | Socket *socket; | |
44d8db9e LP |
322 | |
323 | assert(s); | |
324 | assert(fds); | |
325 | assert(n_fds); | |
326 | ||
3e33402a LP |
327 | if ((r = service_get_sockets(s, &set)) < 0) |
328 | return r; | |
329 | ||
330 | SET_FOREACH(socket, set, i) { | |
44d8db9e LP |
331 | int *cfds; |
332 | unsigned cn_fds; | |
333 | ||
3e33402a | 334 | if ((r = socket_collect_fds(socket, &cfds, &cn_fds)) < 0) |
44d8db9e LP |
335 | goto fail; |
336 | ||
337 | if (!cfds) | |
338 | continue; | |
339 | ||
340 | if (!rfds) { | |
341 | rfds = cfds; | |
342 | rn_fds = cn_fds; | |
343 | } else { | |
344 | int *t; | |
345 | ||
346 | if (!(t = new(int, rn_fds+cn_fds))) { | |
347 | free(cfds); | |
348 | r = -ENOMEM; | |
349 | goto fail; | |
350 | } | |
351 | ||
352 | memcpy(t, rfds, rn_fds); | |
353 | memcpy(t+rn_fds, cfds, cn_fds); | |
354 | free(rfds); | |
355 | free(cfds); | |
356 | ||
357 | rfds = t; | |
358 | rn_fds = rn_fds+cn_fds; | |
359 | } | |
360 | } | |
361 | ||
362 | *fds = rfds; | |
363 | *n_fds = rn_fds; | |
3e33402a LP |
364 | |
365 | set_free(set); | |
366 | ||
44d8db9e LP |
367 | return 0; |
368 | ||
369 | fail: | |
3e33402a | 370 | set_free(set); |
44d8db9e | 371 | free(rfds); |
3e33402a | 372 | |
44d8db9e LP |
373 | return r; |
374 | } | |
375 | ||
376 | static int service_spawn(Service *s, ExecCommand *c, bool timeout, bool pass_fds, pid_t *_pid) { | |
034c6ed7 LP |
377 | pid_t pid; |
378 | int r; | |
44d8db9e LP |
379 | int *fds = NULL; |
380 | unsigned n_fds = 0; | |
034c6ed7 LP |
381 | |
382 | assert(s); | |
383 | assert(c); | |
384 | assert(_pid); | |
385 | ||
44d8db9e LP |
386 | if (pass_fds) |
387 | if ((r = service_collect_fds(s, &fds, &n_fds)) < 0) | |
388 | goto fail; | |
389 | ||
034c6ed7 | 390 | if (timeout) { |
acbb0225 | 391 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
392 | goto fail; |
393 | } else | |
acbb0225 | 394 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 | 395 | |
44d8db9e | 396 | if ((r = exec_spawn(c, &s->exec_context, fds, n_fds, &pid)) < 0) |
034c6ed7 LP |
397 | goto fail; |
398 | ||
87f0e418 | 399 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
400 | /* FIXME: we need to do something here */ |
401 | goto fail; | |
402 | ||
44d8db9e | 403 | free(fds); |
034c6ed7 LP |
404 | *_pid = pid; |
405 | ||
5cb5a6ff | 406 | return 0; |
034c6ed7 LP |
407 | |
408 | fail: | |
44d8db9e LP |
409 | free(fds); |
410 | ||
034c6ed7 | 411 | if (timeout) |
acbb0225 | 412 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
413 | |
414 | return r; | |
415 | } | |
416 | ||
417 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
418 | int r; | |
419 | assert(s); | |
420 | ||
421 | if (!success) | |
422 | s->failure = true; | |
423 | ||
424 | if (allow_restart && | |
425 | (s->restart == SERVICE_RESTART_ALWAYS || | |
426 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
427 | ||
acbb0225 | 428 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
429 | goto fail; |
430 | ||
431 | service_set_state(s, SERVICE_AUTO_RESTART); | |
432 | } else | |
433 | service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); | |
434 | ||
435 | return; | |
436 | ||
437 | fail: | |
87f0e418 | 438 | log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
439 | service_enter_dead(s, false, false); |
440 | } | |
441 | ||
442 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
443 | ||
444 | static void service_enter_stop_post(Service *s, bool success) { | |
445 | int r; | |
446 | assert(s); | |
447 | ||
448 | if (!success) | |
449 | s->failure = true; | |
450 | ||
d6ea93e3 | 451 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) |
44d8db9e | 452 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
453 | goto fail; |
454 | ||
d6ea93e3 LP |
455 | |
456 | service_set_state(s, SERVICE_STOP_POST); | |
457 | ||
458 | if (!s->control_command) | |
034c6ed7 LP |
459 | service_enter_dead(s, true, true); |
460 | ||
461 | return; | |
462 | ||
463 | fail: | |
87f0e418 | 464 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
465 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
466 | } | |
467 | ||
468 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
469 | int r; | |
470 | bool sent = false; | |
471 | ||
472 | assert(s); | |
473 | ||
474 | if (!success) | |
475 | s->failure = true; | |
476 | ||
477 | if (s->main_pid > 0 || s->control_pid > 0) { | |
478 | int sig; | |
479 | ||
480 | sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL; | |
481 | ||
482 | r = 0; | |
483 | if (s->main_pid > 0) { | |
484 | if (kill(s->main_pid, sig) < 0 && errno != ESRCH) | |
485 | r = -errno; | |
486 | else | |
487 | sent = true; | |
488 | } | |
489 | ||
490 | if (s->control_pid > 0) { | |
491 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) | |
492 | r = -errno; | |
493 | else | |
494 | sent = true; | |
495 | } | |
496 | ||
497 | if (r < 0) | |
498 | goto fail; | |
d6ea93e3 | 499 | } |
034c6ed7 | 500 | |
d6ea93e3 LP |
501 | service_set_state(s, state); |
502 | ||
503 | if (s->main_pid <= 0 && s->control_pid <= 0) | |
034c6ed7 LP |
504 | service_enter_dead(s, true, true); |
505 | ||
506 | return; | |
507 | ||
508 | fail: | |
87f0e418 | 509 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
510 | |
511 | if (sent) { | |
512 | s->failure = true; | |
513 | service_set_state(s, state); | |
514 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
515 | service_enter_stop_post(s, false); | |
516 | else | |
517 | service_enter_dead(s, false, true); | |
518 | } | |
519 | ||
520 | static void service_enter_stop(Service *s, bool success) { | |
521 | int r; | |
522 | assert(s); | |
523 | ||
524 | if (!success) | |
525 | s->failure = true; | |
526 | ||
d6ea93e3 | 527 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) |
44d8db9e | 528 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
529 | goto fail; |
530 | ||
d6ea93e3 LP |
531 | service_set_state(s, SERVICE_STOP); |
532 | ||
533 | if (!s->control_command) | |
034c6ed7 LP |
534 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); |
535 | ||
536 | return; | |
537 | ||
538 | fail: | |
87f0e418 | 539 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
540 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
541 | } | |
542 | ||
543 | static void service_enter_start_post(Service *s) { | |
544 | int r; | |
545 | assert(s); | |
546 | ||
d6ea93e3 | 547 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) |
44d8db9e | 548 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
549 | goto fail; |
550 | ||
d6ea93e3 LP |
551 | |
552 | service_set_state(s, SERVICE_START_POST); | |
553 | ||
554 | if (!s->control_command) | |
034c6ed7 LP |
555 | service_set_state(s, SERVICE_RUNNING); |
556 | ||
557 | return; | |
558 | ||
559 | fail: | |
87f0e418 | 560 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
561 | service_enter_stop(s, false); |
562 | } | |
563 | ||
564 | static void service_enter_start(Service *s) { | |
565 | pid_t pid; | |
566 | int r; | |
567 | ||
568 | assert(s); | |
569 | ||
570 | assert(s->exec_command[SERVICE_EXEC_START]); | |
571 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next); | |
572 | ||
44d8db9e | 573 | if ((r = service_spawn(s, s->exec_command[SERVICE_EXEC_START], s->type == SERVICE_FORKING, true, &pid)) < 0) |
034c6ed7 LP |
574 | goto fail; |
575 | ||
d6ea93e3 LP |
576 | service_set_state(s, SERVICE_START); |
577 | ||
034c6ed7 LP |
578 | if (s->type == SERVICE_SIMPLE) { |
579 | /* For simple services we immediately start | |
580 | * the START_POST binaries. */ | |
581 | ||
582 | s->main_pid = pid; | |
583 | s->main_pid_known = true; | |
584 | service_enter_start_post(s); | |
585 | ||
586 | } else if (s->type == SERVICE_FORKING) { | |
587 | ||
588 | /* For forking services we wait until the start | |
589 | * process exited. */ | |
590 | ||
591 | s->control_pid = pid; | |
592 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
034c6ed7 LP |
593 | } else |
594 | assert_not_reached("Unknown service type"); | |
595 | ||
596 | return; | |
597 | ||
598 | fail: | |
87f0e418 | 599 | log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
600 | service_enter_stop(s, false); |
601 | } | |
602 | ||
603 | static void service_enter_start_pre(Service *s) { | |
604 | int r; | |
605 | ||
606 | assert(s); | |
607 | ||
d6ea93e3 | 608 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) |
44d8db9e | 609 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
610 | goto fail; |
611 | ||
d6ea93e3 LP |
612 | service_set_state(s, SERVICE_START_PRE); |
613 | ||
614 | if (!s->control_command) | |
034c6ed7 LP |
615 | service_enter_start(s); |
616 | ||
617 | return; | |
618 | ||
619 | fail: | |
87f0e418 | 620 | log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
621 | service_enter_dead(s, false, true); |
622 | } | |
623 | ||
624 | static void service_enter_restart(Service *s) { | |
625 | int r; | |
626 | assert(s); | |
627 | ||
87f0e418 | 628 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0) |
034c6ed7 LP |
629 | goto fail; |
630 | ||
87f0e418 | 631 | log_debug("%s scheduled restart job.", unit_id(UNIT(s))); |
034c6ed7 LP |
632 | service_enter_dead(s, true, false); |
633 | return; | |
634 | ||
635 | fail: | |
636 | ||
87f0e418 | 637 | log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
638 | service_enter_dead(s, false, false); |
639 | } | |
640 | ||
641 | static void service_enter_reload(Service *s) { | |
642 | int r; | |
643 | ||
644 | assert(s); | |
645 | ||
d6ea93e3 | 646 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) |
44d8db9e | 647 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
648 | goto fail; |
649 | ||
d6ea93e3 LP |
650 | service_set_state(s, SERVICE_RELOAD); |
651 | ||
652 | if (!s->control_command) | |
034c6ed7 LP |
653 | service_set_state(s, SERVICE_RUNNING); |
654 | ||
655 | return; | |
656 | ||
657 | fail: | |
87f0e418 | 658 | log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
659 | service_enter_stop(s, false); |
660 | } | |
661 | ||
662 | static void service_run_next(Service *s, bool success) { | |
663 | int r; | |
664 | ||
665 | assert(s); | |
666 | assert(s->control_command); | |
667 | assert(s->control_command->command_next); | |
668 | ||
669 | if (!success) | |
670 | s->failure = true; | |
671 | ||
672 | s->control_command = s->control_command->command_next; | |
673 | ||
44d8db9e | 674 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
675 | goto fail; |
676 | ||
677 | return; | |
678 | ||
679 | fail: | |
87f0e418 | 680 | log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
681 | |
682 | if (s->state == SERVICE_STOP) | |
683 | service_enter_stop_post(s, false); | |
684 | else if (s->state == SERVICE_STOP_POST) | |
685 | service_enter_dead(s, false, true); | |
686 | else | |
687 | service_enter_stop(s, false); | |
5cb5a6ff LP |
688 | } |
689 | ||
87f0e418 LP |
690 | static int service_start(Unit *u) { |
691 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
692 | |
693 | assert(s); | |
694 | ||
034c6ed7 LP |
695 | /* We cannot fulfill this request right now, try again later |
696 | * please! */ | |
697 | if (s->state == SERVICE_STOP || | |
698 | s->state == SERVICE_STOP_SIGTERM || | |
699 | s->state == SERVICE_STOP_SIGKILL || | |
700 | s->state == SERVICE_STOP_POST || | |
701 | s->state == SERVICE_FINAL_SIGTERM || | |
702 | s->state == SERVICE_FINAL_SIGKILL) | |
5cb5a6ff LP |
703 | return -EAGAIN; |
704 | ||
034c6ed7 LP |
705 | /* Already on it! */ |
706 | if (s->state == SERVICE_START_PRE || | |
707 | s->state == SERVICE_START || | |
708 | s->state == SERVICE_START_POST) | |
709 | return 0; | |
710 | ||
711 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); | |
5cb5a6ff | 712 | |
1e2e8133 LP |
713 | /* Make sure we don't enter a busy loop of some kind. */ |
714 | if (!ratelimit_test(&s->ratelimit)) { | |
715 | log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u)); | |
716 | return -EAGAIN; | |
717 | } | |
718 | ||
034c6ed7 LP |
719 | s->failure = false; |
720 | s->main_pid_known = false; | |
721 | ||
722 | service_enter_start_pre(s); | |
723 | return 0; | |
5cb5a6ff LP |
724 | } |
725 | ||
87f0e418 LP |
726 | static int service_stop(Unit *u) { |
727 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
728 | |
729 | assert(s); | |
730 | ||
034c6ed7 LP |
731 | if (s->state == SERVICE_START_PRE || |
732 | s->state == SERVICE_START || | |
733 | s->state == SERVICE_START_POST || | |
734 | s->state == SERVICE_RELOAD) | |
735 | return -EAGAIN; | |
736 | ||
737 | if (s->state == SERVICE_AUTO_RESTART) { | |
738 | service_set_state(s, SERVICE_DEAD); | |
739 | return 0; | |
740 | } | |
741 | ||
742 | assert(s->state == SERVICE_RUNNING); | |
5cb5a6ff | 743 | |
034c6ed7 | 744 | service_enter_stop(s, true); |
5cb5a6ff LP |
745 | return 0; |
746 | } | |
747 | ||
87f0e418 LP |
748 | static int service_reload(Unit *u) { |
749 | Service *s = SERVICE(u); | |
034c6ed7 LP |
750 | |
751 | assert(s); | |
752 | ||
753 | assert(s->state == SERVICE_RUNNING); | |
754 | ||
755 | service_enter_reload(s); | |
5cb5a6ff LP |
756 | return 0; |
757 | } | |
758 | ||
87f0e418 LP |
759 | static bool service_can_reload(Unit *u) { |
760 | Service *s = SERVICE(u); | |
034c6ed7 LP |
761 | |
762 | assert(s); | |
763 | ||
764 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
765 | } | |
766 | ||
87f0e418 LP |
767 | static UnitActiveState service_active_state(Unit *u) { |
768 | assert(u); | |
5cb5a6ff | 769 | |
acbb0225 | 770 | return state_translation_table[SERVICE(u)->state]; |
034c6ed7 LP |
771 | } |
772 | ||
773 | static int main_pid_good(Service *s) { | |
774 | assert(s); | |
775 | ||
776 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
777 | * don't know */ | |
778 | ||
779 | /* If we know the pid file, then lets just check if it is | |
780 | * still valid */ | |
781 | if (s->main_pid_known) | |
782 | return s->main_pid > 0; | |
783 | ||
784 | /* We don't know the pid */ | |
785 | return -1; | |
786 | } | |
787 | ||
788 | static bool control_pid_good(Service *s) { | |
789 | assert(s); | |
5cb5a6ff | 790 | |
034c6ed7 | 791 | return s->control_pid > 0; |
5cb5a6ff LP |
792 | } |
793 | ||
87f0e418 LP |
794 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
795 | Service *s = SERVICE(u); | |
034c6ed7 | 796 | bool success; |
5cb5a6ff LP |
797 | |
798 | assert(s); | |
034c6ed7 LP |
799 | assert(pid >= 0); |
800 | ||
bd982a8b | 801 | success = code == CLD_EXITED && status == 0; |
034c6ed7 LP |
802 | s->failure = s->failure || !success; |
803 | ||
804 | if (s->main_pid == pid) { | |
805 | ||
806 | exec_status_fill(&s->main_exec_status, pid, code, status); | |
807 | s->main_pid = 0; | |
808 | ||
809 | if (s->type == SERVICE_SIMPLE) { | |
810 | assert(s->exec_command[SERVICE_EXEC_START]); | |
811 | s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status; | |
812 | } | |
813 | ||
94f04347 | 814 | log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); |
034c6ed7 LP |
815 | |
816 | /* The service exited, so the service is officially | |
817 | * gone. */ | |
818 | ||
819 | switch (s->state) { | |
820 | ||
821 | case SERVICE_START_POST: | |
822 | case SERVICE_RELOAD: | |
823 | case SERVICE_STOP: | |
824 | /* Need to wait until the operation is | |
825 | * done */ | |
826 | break; | |
827 | ||
828 | case SERVICE_RUNNING: | |
829 | service_enter_stop(s, success); | |
830 | break; | |
831 | ||
832 | case SERVICE_STOP_SIGTERM: | |
833 | case SERVICE_STOP_SIGKILL: | |
834 | ||
835 | if (!control_pid_good(s)) | |
836 | service_enter_stop_post(s, success); | |
5cb5a6ff | 837 | |
034c6ed7 LP |
838 | /* If there is still a control process, wait for that first */ |
839 | break; | |
5cb5a6ff | 840 | |
034c6ed7 LP |
841 | default: |
842 | assert_not_reached("Uh, main process died at wrong time."); | |
843 | } | |
5cb5a6ff | 844 | |
034c6ed7 LP |
845 | } else if (s->control_pid == pid) { |
846 | assert(s->control_command); | |
847 | ||
848 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
849 | s->control_pid = 0; | |
850 | ||
94f04347 | 851 | log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); |
034c6ed7 LP |
852 | |
853 | /* If we are shutting things down anyway we | |
854 | * don't care about failing commands. */ | |
855 | ||
856 | if (s->control_command->command_next && | |
857 | (success || (s->state == SERVICE_EXEC_STOP || s->state == SERVICE_EXEC_STOP_POST))) | |
858 | ||
859 | /* There is another command to * | |
860 | * execute, so let's do that. */ | |
861 | ||
862 | service_run_next(s, success); | |
863 | ||
864 | else { | |
865 | /* No further commands for this step, so let's | |
866 | * figure out what to do next */ | |
867 | ||
94f04347 | 868 | log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state)); |
bd982a8b | 869 | |
034c6ed7 LP |
870 | switch (s->state) { |
871 | ||
872 | case SERVICE_START_PRE: | |
873 | if (success) | |
874 | service_enter_start(s); | |
875 | else | |
876 | service_enter_stop(s, false); | |
877 | break; | |
878 | ||
879 | case SERVICE_START: | |
880 | assert(s->type == SERVICE_FORKING); | |
881 | ||
882 | /* Let's try to load the pid | |
883 | * file here if we can. We | |
884 | * ignore the return value, | |
885 | * since the PID file might | |
886 | * actually be created by a | |
887 | * START_POST script */ | |
888 | ||
889 | if (success) { | |
890 | if (s->pid_file) | |
891 | service_load_pid_file(s); | |
892 | ||
893 | service_enter_start_post(s); | |
894 | } else | |
895 | service_enter_stop(s, false); | |
896 | ||
897 | break; | |
898 | ||
899 | case SERVICE_START_POST: | |
900 | if (success && s->pid_file && !s->main_pid_known) { | |
901 | int r; | |
902 | ||
903 | /* Hmm, let's see if we can | |
904 | * load the pid now after the | |
905 | * start-post scripts got | |
906 | * executed. */ | |
907 | ||
908 | if ((r = service_load_pid_file(s)) < 0) | |
87f0e418 | 909 | log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r)); |
034c6ed7 LP |
910 | } |
911 | ||
912 | /* Fall through */ | |
913 | ||
914 | case SERVICE_RELOAD: | |
915 | if (success) { | |
916 | if (main_pid_good(s) != 0) | |
917 | service_set_state(s, SERVICE_RUNNING); | |
918 | else | |
919 | service_enter_stop(s, true); | |
920 | } else | |
921 | service_enter_stop(s, false); | |
922 | ||
923 | break; | |
924 | ||
925 | case SERVICE_STOP: | |
926 | if (main_pid_good(s) > 0) | |
927 | /* Still not dead and we know the PID? Let's go hunting. */ | |
928 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
929 | else | |
930 | service_enter_stop_post(s, success); | |
931 | break; | |
932 | ||
933 | case SERVICE_STOP_SIGTERM: | |
934 | case SERVICE_STOP_SIGKILL: | |
935 | if (main_pid_good(s) <= 0) | |
936 | service_enter_stop_post(s, success); | |
937 | ||
938 | /* If there is still a service | |
939 | * process around, wait until | |
940 | * that one quit, too */ | |
941 | break; | |
942 | ||
943 | case SERVICE_STOP_POST: | |
944 | case SERVICE_FINAL_SIGTERM: | |
945 | case SERVICE_FINAL_SIGKILL: | |
946 | service_enter_dead(s, success, true); | |
947 | break; | |
948 | ||
949 | default: | |
950 | assert_not_reached("Uh, control process died at wrong time."); | |
951 | } | |
952 | } | |
953 | } else | |
954 | assert_not_reached("Got SIGCHLD for unkown PID"); | |
955 | } | |
956 | ||
acbb0225 | 957 | static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { |
87f0e418 | 958 | Service *s = SERVICE(u); |
034c6ed7 LP |
959 | |
960 | assert(s); | |
961 | assert(elapsed == 1); | |
962 | ||
acbb0225 | 963 | assert(w == &s->timer_watch); |
034c6ed7 LP |
964 | |
965 | switch (s->state) { | |
966 | ||
967 | case SERVICE_START_PRE: | |
968 | case SERVICE_START: | |
969 | case SERVICE_START_POST: | |
970 | case SERVICE_RELOAD: | |
87f0e418 | 971 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
972 | service_enter_stop(s, false); |
973 | break; | |
974 | ||
975 | case SERVICE_STOP: | |
87f0e418 | 976 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
977 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
978 | break; | |
979 | ||
980 | case SERVICE_STOP_SIGTERM: | |
87f0e418 | 981 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
982 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); |
983 | break; | |
984 | ||
985 | case SERVICE_STOP_SIGKILL: | |
986 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
987 | * Must be something we cannot kill, so let's just be | |
988 | * weirded out and continue */ | |
989 | ||
87f0e418 | 990 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
991 | service_enter_stop_post(s, false); |
992 | break; | |
993 | ||
994 | case SERVICE_STOP_POST: | |
87f0e418 | 995 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
996 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
997 | break; | |
998 | ||
999 | case SERVICE_FINAL_SIGTERM: | |
87f0e418 | 1000 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
1001 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); |
1002 | break; | |
1003 | ||
1004 | case SERVICE_FINAL_SIGKILL: | |
87f0e418 | 1005 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
1006 | service_enter_dead(s, false, true); |
1007 | break; | |
1008 | ||
1009 | case SERVICE_AUTO_RESTART: | |
87f0e418 | 1010 | log_debug("%s holdoff time over, scheduling restart.", unit_id(u)); |
034c6ed7 LP |
1011 | service_enter_restart(s); |
1012 | break; | |
1013 | ||
1014 | default: | |
1015 | assert_not_reached("Timeout at wrong time."); | |
1016 | } | |
5cb5a6ff LP |
1017 | } |
1018 | ||
94f04347 LP |
1019 | static const char* const service_state_table[_SERVICE_STATE_MAX] = { |
1020 | [SERVICE_DEAD] = "dead", | |
1021 | [SERVICE_START_PRE] = "start-pre", | |
1022 | [SERVICE_START] = "start", | |
1023 | [SERVICE_START_POST] = "start-post", | |
1024 | [SERVICE_RUNNING] = "running", | |
1025 | [SERVICE_RELOAD] = "reload", | |
1026 | [SERVICE_STOP] = "stop", | |
1027 | [SERVICE_STOP_SIGTERM] = "stop-sigterm", | |
1028 | [SERVICE_STOP_SIGKILL] = "stop-sigkill", | |
1029 | [SERVICE_STOP_POST] = "stop-post", | |
1030 | [SERVICE_FINAL_SIGTERM] = "final-sigterm", | |
1031 | [SERVICE_FINAL_SIGKILL] = "final-sigkill", | |
1032 | [SERVICE_MAINTAINANCE] = "maintainance", | |
1033 | [SERVICE_AUTO_RESTART] = "auto-restart", | |
1034 | }; | |
1035 | ||
1036 | DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState); | |
1037 | ||
1038 | static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { | |
1039 | [SERVICE_ONCE] = "once", | |
1040 | [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success", | |
1041 | [SERVICE_RESTART_ALWAYS] = "restart-on-failure", | |
1042 | }; | |
1043 | ||
1044 | DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart); | |
1045 | ||
1046 | static const char* const service_type_table[_SERVICE_TYPE_MAX] = { | |
1047 | [SERVICE_FORKING] = "forking", | |
1048 | [SERVICE_SIMPLE] = "simple", | |
1049 | [SERVICE_FINISH] = "finish" | |
1050 | }; | |
1051 | ||
1052 | DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); | |
1053 | ||
1054 | static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = { | |
1055 | [SERVICE_EXEC_START_PRE] = "ExecStartPre", | |
1056 | [SERVICE_EXEC_START] = "ExecStart", | |
1057 | [SERVICE_EXEC_START_POST] = "ExecStartPost", | |
1058 | [SERVICE_EXEC_RELOAD] = "ExecReload", | |
1059 | [SERVICE_EXEC_STOP] = "ExecStop", | |
1060 | [SERVICE_EXEC_STOP_POST] = "ExecStopPost", | |
1061 | }; | |
1062 | ||
1063 | DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); | |
1064 | ||
87f0e418 | 1065 | const UnitVTable service_vtable = { |
5cb5a6ff LP |
1066 | .suffix = ".service", |
1067 | ||
034c6ed7 LP |
1068 | .init = service_init, |
1069 | .done = service_done, | |
1070 | ||
5cb5a6ff LP |
1071 | .dump = service_dump, |
1072 | ||
1073 | .start = service_start, | |
1074 | .stop = service_stop, | |
1075 | .reload = service_reload, | |
1076 | ||
034c6ed7 LP |
1077 | .can_reload = service_can_reload, |
1078 | ||
5cb5a6ff LP |
1079 | .active_state = service_active_state, |
1080 | ||
034c6ed7 LP |
1081 | .sigchld_event = service_sigchld_event, |
1082 | .timer_event = service_timer_event, | |
5cb5a6ff | 1083 | }; |