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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 | 264 | |
7d55e835 LP |
265 | if (state != SERVICE_START && |
266 | state != SERVICE_START_POST && | |
034c6ed7 LP |
267 | state != SERVICE_RUNNING && |
268 | state != SERVICE_RELOAD && | |
269 | state != SERVICE_STOP && | |
270 | state != SERVICE_STOP_SIGTERM && | |
271 | state != SERVICE_STOP_SIGKILL) | |
acbb0225 | 272 | if (s->main_pid > 0) { |
87f0e418 | 273 | unit_unwatch_pid(UNIT(s), s->main_pid); |
034c6ed7 LP |
274 | s->main_pid = 0; |
275 | } | |
276 | ||
277 | if (state != SERVICE_START_PRE && | |
278 | state != SERVICE_START && | |
279 | state != SERVICE_START_POST && | |
280 | state != SERVICE_RELOAD && | |
281 | state != SERVICE_STOP && | |
282 | state != SERVICE_STOP_SIGTERM && | |
283 | state != SERVICE_STOP_SIGKILL && | |
284 | state != SERVICE_STOP_POST && | |
285 | state != SERVICE_FINAL_SIGTERM && | |
286 | state != SERVICE_FINAL_SIGKILL) | |
acbb0225 | 287 | if (s->control_pid > 0) { |
87f0e418 | 288 | unit_unwatch_pid(UNIT(s), s->control_pid); |
034c6ed7 LP |
289 | s->control_pid = 0; |
290 | } | |
291 | ||
292 | if (state != SERVICE_START_PRE && | |
293 | state != SERVICE_START && | |
294 | state != SERVICE_START_POST && | |
295 | state != SERVICE_RELOAD && | |
296 | state != SERVICE_STOP && | |
297 | state != SERVICE_STOP_POST) | |
298 | s->control_command = NULL; | |
299 | ||
ceee3d82 LP |
300 | if (state == SERVICE_DEAD || |
301 | state == SERVICE_STOP || | |
302 | state == SERVICE_STOP_SIGTERM || | |
303 | state == SERVICE_STOP_SIGKILL || | |
304 | state == SERVICE_STOP_POST || | |
305 | state == SERVICE_FINAL_SIGTERM || | |
306 | state == SERVICE_FINAL_SIGKILL || | |
307 | state == SERVICE_MAINTAINANCE || | |
308 | state == SERVICE_AUTO_RESTART) | |
309 | service_notify_sockets(s); | |
310 | ||
94f04347 | 311 | log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state)); |
acbb0225 LP |
312 | |
313 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
034c6ed7 LP |
314 | } |
315 | ||
44d8db9e LP |
316 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { |
317 | Iterator i; | |
318 | int r; | |
319 | int *rfds = NULL; | |
320 | unsigned rn_fds = 0; | |
3e33402a LP |
321 | Set *set; |
322 | Socket *socket; | |
44d8db9e LP |
323 | |
324 | assert(s); | |
325 | assert(fds); | |
326 | assert(n_fds); | |
327 | ||
3e33402a LP |
328 | if ((r = service_get_sockets(s, &set)) < 0) |
329 | return r; | |
330 | ||
331 | SET_FOREACH(socket, set, i) { | |
44d8db9e LP |
332 | int *cfds; |
333 | unsigned cn_fds; | |
334 | ||
3e33402a | 335 | if ((r = socket_collect_fds(socket, &cfds, &cn_fds)) < 0) |
44d8db9e LP |
336 | goto fail; |
337 | ||
338 | if (!cfds) | |
339 | continue; | |
340 | ||
341 | if (!rfds) { | |
342 | rfds = cfds; | |
343 | rn_fds = cn_fds; | |
344 | } else { | |
345 | int *t; | |
346 | ||
347 | if (!(t = new(int, rn_fds+cn_fds))) { | |
348 | free(cfds); | |
349 | r = -ENOMEM; | |
350 | goto fail; | |
351 | } | |
352 | ||
353 | memcpy(t, rfds, rn_fds); | |
354 | memcpy(t+rn_fds, cfds, cn_fds); | |
355 | free(rfds); | |
356 | free(cfds); | |
357 | ||
358 | rfds = t; | |
359 | rn_fds = rn_fds+cn_fds; | |
360 | } | |
361 | } | |
362 | ||
363 | *fds = rfds; | |
364 | *n_fds = rn_fds; | |
3e33402a LP |
365 | |
366 | set_free(set); | |
367 | ||
44d8db9e LP |
368 | return 0; |
369 | ||
370 | fail: | |
3e33402a | 371 | set_free(set); |
44d8db9e | 372 | free(rfds); |
3e33402a | 373 | |
44d8db9e LP |
374 | return r; |
375 | } | |
376 | ||
377 | static int service_spawn(Service *s, ExecCommand *c, bool timeout, bool pass_fds, pid_t *_pid) { | |
034c6ed7 LP |
378 | pid_t pid; |
379 | int r; | |
44d8db9e LP |
380 | int *fds = NULL; |
381 | unsigned n_fds = 0; | |
034c6ed7 LP |
382 | |
383 | assert(s); | |
384 | assert(c); | |
385 | assert(_pid); | |
386 | ||
44d8db9e LP |
387 | if (pass_fds) |
388 | if ((r = service_collect_fds(s, &fds, &n_fds)) < 0) | |
389 | goto fail; | |
390 | ||
034c6ed7 | 391 | if (timeout) { |
acbb0225 | 392 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
393 | goto fail; |
394 | } else | |
acbb0225 | 395 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 | 396 | |
44d8db9e | 397 | if ((r = exec_spawn(c, &s->exec_context, fds, n_fds, &pid)) < 0) |
034c6ed7 LP |
398 | goto fail; |
399 | ||
87f0e418 | 400 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
401 | /* FIXME: we need to do something here */ |
402 | goto fail; | |
403 | ||
44d8db9e | 404 | free(fds); |
034c6ed7 LP |
405 | *_pid = pid; |
406 | ||
5cb5a6ff | 407 | return 0; |
034c6ed7 LP |
408 | |
409 | fail: | |
44d8db9e LP |
410 | free(fds); |
411 | ||
034c6ed7 | 412 | if (timeout) |
acbb0225 | 413 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
414 | |
415 | return r; | |
416 | } | |
417 | ||
418 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
419 | int r; | |
420 | assert(s); | |
421 | ||
422 | if (!success) | |
423 | s->failure = true; | |
424 | ||
425 | if (allow_restart && | |
426 | (s->restart == SERVICE_RESTART_ALWAYS || | |
427 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
428 | ||
acbb0225 | 429 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
430 | goto fail; |
431 | ||
432 | service_set_state(s, SERVICE_AUTO_RESTART); | |
433 | } else | |
434 | service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); | |
435 | ||
436 | return; | |
437 | ||
438 | fail: | |
87f0e418 | 439 | log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
440 | service_enter_dead(s, false, false); |
441 | } | |
442 | ||
443 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
444 | ||
445 | static void service_enter_stop_post(Service *s, bool success) { | |
446 | int r; | |
447 | assert(s); | |
448 | ||
449 | if (!success) | |
450 | s->failure = true; | |
451 | ||
d6ea93e3 | 452 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) |
44d8db9e | 453 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
454 | goto fail; |
455 | ||
d6ea93e3 LP |
456 | |
457 | service_set_state(s, SERVICE_STOP_POST); | |
458 | ||
459 | if (!s->control_command) | |
034c6ed7 LP |
460 | service_enter_dead(s, true, true); |
461 | ||
462 | return; | |
463 | ||
464 | fail: | |
87f0e418 | 465 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
466 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
467 | } | |
468 | ||
469 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
470 | int r; | |
471 | bool sent = false; | |
472 | ||
473 | assert(s); | |
474 | ||
475 | if (!success) | |
476 | s->failure = true; | |
477 | ||
478 | if (s->main_pid > 0 || s->control_pid > 0) { | |
479 | int sig; | |
480 | ||
481 | sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL; | |
482 | ||
483 | r = 0; | |
484 | if (s->main_pid > 0) { | |
485 | if (kill(s->main_pid, sig) < 0 && errno != ESRCH) | |
486 | r = -errno; | |
487 | else | |
488 | sent = true; | |
489 | } | |
490 | ||
491 | if (s->control_pid > 0) { | |
492 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) | |
493 | r = -errno; | |
494 | else | |
495 | sent = true; | |
496 | } | |
497 | ||
498 | if (r < 0) | |
499 | goto fail; | |
d6ea93e3 | 500 | } |
034c6ed7 | 501 | |
d6ea93e3 LP |
502 | service_set_state(s, state); |
503 | ||
504 | if (s->main_pid <= 0 && s->control_pid <= 0) | |
034c6ed7 LP |
505 | service_enter_dead(s, true, true); |
506 | ||
507 | return; | |
508 | ||
509 | fail: | |
87f0e418 | 510 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
511 | |
512 | if (sent) { | |
513 | s->failure = true; | |
514 | service_set_state(s, state); | |
515 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
516 | service_enter_stop_post(s, false); | |
517 | else | |
518 | service_enter_dead(s, false, true); | |
519 | } | |
520 | ||
521 | static void service_enter_stop(Service *s, bool success) { | |
522 | int r; | |
523 | assert(s); | |
524 | ||
525 | if (!success) | |
526 | s->failure = true; | |
527 | ||
d6ea93e3 | 528 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) |
44d8db9e | 529 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
530 | goto fail; |
531 | ||
d6ea93e3 LP |
532 | service_set_state(s, SERVICE_STOP); |
533 | ||
534 | if (!s->control_command) | |
034c6ed7 LP |
535 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); |
536 | ||
537 | return; | |
538 | ||
539 | fail: | |
87f0e418 | 540 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
541 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
542 | } | |
543 | ||
544 | static void service_enter_start_post(Service *s) { | |
545 | int r; | |
546 | assert(s); | |
547 | ||
d6ea93e3 | 548 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) |
44d8db9e | 549 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
550 | goto fail; |
551 | ||
d6ea93e3 LP |
552 | |
553 | service_set_state(s, SERVICE_START_POST); | |
554 | ||
555 | if (!s->control_command) | |
034c6ed7 LP |
556 | service_set_state(s, SERVICE_RUNNING); |
557 | ||
558 | return; | |
559 | ||
560 | fail: | |
87f0e418 | 561 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
562 | service_enter_stop(s, false); |
563 | } | |
564 | ||
565 | static void service_enter_start(Service *s) { | |
566 | pid_t pid; | |
567 | int r; | |
568 | ||
569 | assert(s); | |
570 | ||
571 | assert(s->exec_command[SERVICE_EXEC_START]); | |
572 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next); | |
573 | ||
44d8db9e | 574 | if ((r = service_spawn(s, s->exec_command[SERVICE_EXEC_START], s->type == SERVICE_FORKING, true, &pid)) < 0) |
034c6ed7 LP |
575 | goto fail; |
576 | ||
d6ea93e3 LP |
577 | service_set_state(s, SERVICE_START); |
578 | ||
034c6ed7 LP |
579 | if (s->type == SERVICE_SIMPLE) { |
580 | /* For simple services we immediately start | |
581 | * the START_POST binaries. */ | |
582 | ||
583 | s->main_pid = pid; | |
584 | s->main_pid_known = true; | |
585 | service_enter_start_post(s); | |
586 | ||
587 | } else if (s->type == SERVICE_FORKING) { | |
588 | ||
589 | /* For forking services we wait until the start | |
590 | * process exited. */ | |
591 | ||
592 | s->control_pid = pid; | |
593 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
7d55e835 LP |
594 | } else if (s->type == SERVICE_FINISH) { |
595 | ||
596 | /* For finishing services we wait until the start | |
597 | * process exited, too, but it is our main process. */ | |
598 | ||
599 | s->main_pid = pid; | |
600 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
034c6ed7 LP |
601 | } else |
602 | assert_not_reached("Unknown service type"); | |
603 | ||
604 | return; | |
605 | ||
606 | fail: | |
87f0e418 | 607 | log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
608 | service_enter_stop(s, false); |
609 | } | |
610 | ||
611 | static void service_enter_start_pre(Service *s) { | |
612 | int r; | |
613 | ||
614 | assert(s); | |
615 | ||
d6ea93e3 | 616 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) |
44d8db9e | 617 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
618 | goto fail; |
619 | ||
d6ea93e3 LP |
620 | service_set_state(s, SERVICE_START_PRE); |
621 | ||
622 | if (!s->control_command) | |
034c6ed7 LP |
623 | service_enter_start(s); |
624 | ||
625 | return; | |
626 | ||
627 | fail: | |
87f0e418 | 628 | log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
629 | service_enter_dead(s, false, true); |
630 | } | |
631 | ||
632 | static void service_enter_restart(Service *s) { | |
633 | int r; | |
634 | assert(s); | |
635 | ||
87f0e418 | 636 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0) |
034c6ed7 LP |
637 | goto fail; |
638 | ||
87f0e418 | 639 | log_debug("%s scheduled restart job.", unit_id(UNIT(s))); |
034c6ed7 LP |
640 | service_enter_dead(s, true, false); |
641 | return; | |
642 | ||
643 | fail: | |
644 | ||
87f0e418 | 645 | log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
646 | service_enter_dead(s, false, false); |
647 | } | |
648 | ||
649 | static void service_enter_reload(Service *s) { | |
650 | int r; | |
651 | ||
652 | assert(s); | |
653 | ||
d6ea93e3 | 654 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) |
44d8db9e | 655 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
656 | goto fail; |
657 | ||
d6ea93e3 LP |
658 | service_set_state(s, SERVICE_RELOAD); |
659 | ||
660 | if (!s->control_command) | |
034c6ed7 LP |
661 | service_set_state(s, SERVICE_RUNNING); |
662 | ||
663 | return; | |
664 | ||
665 | fail: | |
87f0e418 | 666 | log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
667 | service_enter_stop(s, false); |
668 | } | |
669 | ||
670 | static void service_run_next(Service *s, bool success) { | |
671 | int r; | |
672 | ||
673 | assert(s); | |
674 | assert(s->control_command); | |
675 | assert(s->control_command->command_next); | |
676 | ||
677 | if (!success) | |
678 | s->failure = true; | |
679 | ||
680 | s->control_command = s->control_command->command_next; | |
681 | ||
44d8db9e | 682 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
683 | goto fail; |
684 | ||
685 | return; | |
686 | ||
687 | fail: | |
87f0e418 | 688 | log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
689 | |
690 | if (s->state == SERVICE_STOP) | |
691 | service_enter_stop_post(s, false); | |
692 | else if (s->state == SERVICE_STOP_POST) | |
693 | service_enter_dead(s, false, true); | |
694 | else | |
695 | service_enter_stop(s, false); | |
5cb5a6ff LP |
696 | } |
697 | ||
87f0e418 LP |
698 | static int service_start(Unit *u) { |
699 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
700 | |
701 | assert(s); | |
702 | ||
034c6ed7 LP |
703 | /* We cannot fulfill this request right now, try again later |
704 | * please! */ | |
705 | if (s->state == SERVICE_STOP || | |
706 | s->state == SERVICE_STOP_SIGTERM || | |
707 | s->state == SERVICE_STOP_SIGKILL || | |
708 | s->state == SERVICE_STOP_POST || | |
709 | s->state == SERVICE_FINAL_SIGTERM || | |
710 | s->state == SERVICE_FINAL_SIGKILL) | |
5cb5a6ff LP |
711 | return -EAGAIN; |
712 | ||
034c6ed7 LP |
713 | /* Already on it! */ |
714 | if (s->state == SERVICE_START_PRE || | |
715 | s->state == SERVICE_START || | |
716 | s->state == SERVICE_START_POST) | |
717 | return 0; | |
718 | ||
719 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); | |
5cb5a6ff | 720 | |
1e2e8133 LP |
721 | /* Make sure we don't enter a busy loop of some kind. */ |
722 | if (!ratelimit_test(&s->ratelimit)) { | |
723 | log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u)); | |
724 | return -EAGAIN; | |
725 | } | |
726 | ||
034c6ed7 LP |
727 | s->failure = false; |
728 | s->main_pid_known = false; | |
729 | ||
730 | service_enter_start_pre(s); | |
731 | return 0; | |
5cb5a6ff LP |
732 | } |
733 | ||
87f0e418 LP |
734 | static int service_stop(Unit *u) { |
735 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
736 | |
737 | assert(s); | |
738 | ||
034c6ed7 LP |
739 | if (s->state == SERVICE_START_PRE || |
740 | s->state == SERVICE_START || | |
741 | s->state == SERVICE_START_POST || | |
742 | s->state == SERVICE_RELOAD) | |
743 | return -EAGAIN; | |
744 | ||
745 | if (s->state == SERVICE_AUTO_RESTART) { | |
746 | service_set_state(s, SERVICE_DEAD); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | assert(s->state == SERVICE_RUNNING); | |
5cb5a6ff | 751 | |
034c6ed7 | 752 | service_enter_stop(s, true); |
5cb5a6ff LP |
753 | return 0; |
754 | } | |
755 | ||
87f0e418 LP |
756 | static int service_reload(Unit *u) { |
757 | Service *s = SERVICE(u); | |
034c6ed7 LP |
758 | |
759 | assert(s); | |
760 | ||
761 | assert(s->state == SERVICE_RUNNING); | |
762 | ||
763 | service_enter_reload(s); | |
5cb5a6ff LP |
764 | return 0; |
765 | } | |
766 | ||
87f0e418 LP |
767 | static bool service_can_reload(Unit *u) { |
768 | Service *s = SERVICE(u); | |
034c6ed7 LP |
769 | |
770 | assert(s); | |
771 | ||
772 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
773 | } | |
774 | ||
87f0e418 LP |
775 | static UnitActiveState service_active_state(Unit *u) { |
776 | assert(u); | |
5cb5a6ff | 777 | |
acbb0225 | 778 | return state_translation_table[SERVICE(u)->state]; |
034c6ed7 LP |
779 | } |
780 | ||
781 | static int main_pid_good(Service *s) { | |
782 | assert(s); | |
783 | ||
784 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
785 | * don't know */ | |
786 | ||
787 | /* If we know the pid file, then lets just check if it is | |
788 | * still valid */ | |
789 | if (s->main_pid_known) | |
790 | return s->main_pid > 0; | |
791 | ||
792 | /* We don't know the pid */ | |
793 | return -1; | |
794 | } | |
795 | ||
796 | static bool control_pid_good(Service *s) { | |
797 | assert(s); | |
5cb5a6ff | 798 | |
034c6ed7 | 799 | return s->control_pid > 0; |
5cb5a6ff LP |
800 | } |
801 | ||
87f0e418 LP |
802 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
803 | Service *s = SERVICE(u); | |
034c6ed7 | 804 | bool success; |
5cb5a6ff LP |
805 | |
806 | assert(s); | |
034c6ed7 LP |
807 | assert(pid >= 0); |
808 | ||
bd982a8b | 809 | success = code == CLD_EXITED && status == 0; |
034c6ed7 LP |
810 | s->failure = s->failure || !success; |
811 | ||
812 | if (s->main_pid == pid) { | |
813 | ||
814 | exec_status_fill(&s->main_exec_status, pid, code, status); | |
815 | s->main_pid = 0; | |
816 | ||
7d55e835 | 817 | if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) { |
034c6ed7 LP |
818 | assert(s->exec_command[SERVICE_EXEC_START]); |
819 | s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status; | |
820 | } | |
821 | ||
94f04347 | 822 | log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); |
034c6ed7 LP |
823 | |
824 | /* The service exited, so the service is officially | |
825 | * gone. */ | |
826 | ||
827 | switch (s->state) { | |
828 | ||
829 | case SERVICE_START_POST: | |
830 | case SERVICE_RELOAD: | |
831 | case SERVICE_STOP: | |
832 | /* Need to wait until the operation is | |
833 | * done */ | |
834 | break; | |
835 | ||
7d55e835 LP |
836 | case SERVICE_START: |
837 | assert(s->type == SERVICE_FINISH); | |
838 | ||
839 | /* This was our main goal, so let's go on */ | |
840 | if (success) | |
841 | service_enter_start_post(s); | |
842 | else | |
843 | service_enter_stop(s, false); | |
844 | break; | |
845 | ||
034c6ed7 LP |
846 | case SERVICE_RUNNING: |
847 | service_enter_stop(s, success); | |
848 | break; | |
849 | ||
850 | case SERVICE_STOP_SIGTERM: | |
851 | case SERVICE_STOP_SIGKILL: | |
852 | ||
853 | if (!control_pid_good(s)) | |
854 | service_enter_stop_post(s, success); | |
5cb5a6ff | 855 | |
034c6ed7 LP |
856 | /* If there is still a control process, wait for that first */ |
857 | break; | |
5cb5a6ff | 858 | |
034c6ed7 LP |
859 | default: |
860 | assert_not_reached("Uh, main process died at wrong time."); | |
861 | } | |
5cb5a6ff | 862 | |
034c6ed7 LP |
863 | } else if (s->control_pid == pid) { |
864 | assert(s->control_command); | |
865 | ||
866 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
867 | s->control_pid = 0; | |
868 | ||
94f04347 | 869 | log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status); |
034c6ed7 LP |
870 | |
871 | /* If we are shutting things down anyway we | |
872 | * don't care about failing commands. */ | |
873 | ||
874 | if (s->control_command->command_next && | |
875 | (success || (s->state == SERVICE_EXEC_STOP || s->state == SERVICE_EXEC_STOP_POST))) | |
876 | ||
877 | /* There is another command to * | |
878 | * execute, so let's do that. */ | |
879 | ||
880 | service_run_next(s, success); | |
881 | ||
882 | else { | |
883 | /* No further commands for this step, so let's | |
884 | * figure out what to do next */ | |
885 | ||
94f04347 | 886 | log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state)); |
bd982a8b | 887 | |
034c6ed7 LP |
888 | switch (s->state) { |
889 | ||
890 | case SERVICE_START_PRE: | |
891 | if (success) | |
892 | service_enter_start(s); | |
893 | else | |
894 | service_enter_stop(s, false); | |
895 | break; | |
896 | ||
897 | case SERVICE_START: | |
898 | assert(s->type == SERVICE_FORKING); | |
899 | ||
900 | /* Let's try to load the pid | |
901 | * file here if we can. We | |
902 | * ignore the return value, | |
903 | * since the PID file might | |
904 | * actually be created by a | |
905 | * START_POST script */ | |
906 | ||
907 | if (success) { | |
908 | if (s->pid_file) | |
909 | service_load_pid_file(s); | |
910 | ||
911 | service_enter_start_post(s); | |
912 | } else | |
913 | service_enter_stop(s, false); | |
914 | ||
915 | break; | |
916 | ||
917 | case SERVICE_START_POST: | |
918 | if (success && s->pid_file && !s->main_pid_known) { | |
919 | int r; | |
920 | ||
921 | /* Hmm, let's see if we can | |
922 | * load the pid now after the | |
923 | * start-post scripts got | |
924 | * executed. */ | |
925 | ||
926 | if ((r = service_load_pid_file(s)) < 0) | |
87f0e418 | 927 | log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r)); |
034c6ed7 LP |
928 | } |
929 | ||
930 | /* Fall through */ | |
931 | ||
932 | case SERVICE_RELOAD: | |
933 | if (success) { | |
934 | if (main_pid_good(s) != 0) | |
935 | service_set_state(s, SERVICE_RUNNING); | |
936 | else | |
937 | service_enter_stop(s, true); | |
938 | } else | |
939 | service_enter_stop(s, false); | |
940 | ||
941 | break; | |
942 | ||
943 | case SERVICE_STOP: | |
944 | if (main_pid_good(s) > 0) | |
945 | /* Still not dead and we know the PID? Let's go hunting. */ | |
946 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
947 | else | |
948 | service_enter_stop_post(s, success); | |
949 | break; | |
950 | ||
951 | case SERVICE_STOP_SIGTERM: | |
952 | case SERVICE_STOP_SIGKILL: | |
953 | if (main_pid_good(s) <= 0) | |
954 | service_enter_stop_post(s, success); | |
955 | ||
956 | /* If there is still a service | |
957 | * process around, wait until | |
958 | * that one quit, too */ | |
959 | break; | |
960 | ||
961 | case SERVICE_STOP_POST: | |
962 | case SERVICE_FINAL_SIGTERM: | |
963 | case SERVICE_FINAL_SIGKILL: | |
964 | service_enter_dead(s, success, true); | |
965 | break; | |
966 | ||
967 | default: | |
968 | assert_not_reached("Uh, control process died at wrong time."); | |
969 | } | |
970 | } | |
971 | } else | |
972 | assert_not_reached("Got SIGCHLD for unkown PID"); | |
973 | } | |
974 | ||
acbb0225 | 975 | static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { |
87f0e418 | 976 | Service *s = SERVICE(u); |
034c6ed7 LP |
977 | |
978 | assert(s); | |
979 | assert(elapsed == 1); | |
980 | ||
acbb0225 | 981 | assert(w == &s->timer_watch); |
034c6ed7 LP |
982 | |
983 | switch (s->state) { | |
984 | ||
985 | case SERVICE_START_PRE: | |
986 | case SERVICE_START: | |
987 | case SERVICE_START_POST: | |
988 | case SERVICE_RELOAD: | |
87f0e418 | 989 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
990 | service_enter_stop(s, false); |
991 | break; | |
992 | ||
993 | case SERVICE_STOP: | |
87f0e418 | 994 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
995 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
996 | break; | |
997 | ||
998 | case SERVICE_STOP_SIGTERM: | |
87f0e418 | 999 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
1000 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); |
1001 | break; | |
1002 | ||
1003 | case SERVICE_STOP_SIGKILL: | |
1004 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
1005 | * Must be something we cannot kill, so let's just be | |
1006 | * weirded out and continue */ | |
1007 | ||
87f0e418 | 1008 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
1009 | service_enter_stop_post(s, false); |
1010 | break; | |
1011 | ||
1012 | case SERVICE_STOP_POST: | |
87f0e418 | 1013 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
1014 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
1015 | break; | |
1016 | ||
1017 | case SERVICE_FINAL_SIGTERM: | |
87f0e418 | 1018 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
1019 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); |
1020 | break; | |
1021 | ||
1022 | case SERVICE_FINAL_SIGKILL: | |
87f0e418 | 1023 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
1024 | service_enter_dead(s, false, true); |
1025 | break; | |
1026 | ||
1027 | case SERVICE_AUTO_RESTART: | |
87f0e418 | 1028 | log_debug("%s holdoff time over, scheduling restart.", unit_id(u)); |
034c6ed7 LP |
1029 | service_enter_restart(s); |
1030 | break; | |
1031 | ||
1032 | default: | |
1033 | assert_not_reached("Timeout at wrong time."); | |
1034 | } | |
5cb5a6ff LP |
1035 | } |
1036 | ||
94f04347 LP |
1037 | static const char* const service_state_table[_SERVICE_STATE_MAX] = { |
1038 | [SERVICE_DEAD] = "dead", | |
1039 | [SERVICE_START_PRE] = "start-pre", | |
1040 | [SERVICE_START] = "start", | |
1041 | [SERVICE_START_POST] = "start-post", | |
1042 | [SERVICE_RUNNING] = "running", | |
1043 | [SERVICE_RELOAD] = "reload", | |
1044 | [SERVICE_STOP] = "stop", | |
1045 | [SERVICE_STOP_SIGTERM] = "stop-sigterm", | |
1046 | [SERVICE_STOP_SIGKILL] = "stop-sigkill", | |
1047 | [SERVICE_STOP_POST] = "stop-post", | |
1048 | [SERVICE_FINAL_SIGTERM] = "final-sigterm", | |
1049 | [SERVICE_FINAL_SIGKILL] = "final-sigkill", | |
1050 | [SERVICE_MAINTAINANCE] = "maintainance", | |
1051 | [SERVICE_AUTO_RESTART] = "auto-restart", | |
1052 | }; | |
1053 | ||
1054 | DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState); | |
1055 | ||
1056 | static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { | |
1057 | [SERVICE_ONCE] = "once", | |
1058 | [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success", | |
1059 | [SERVICE_RESTART_ALWAYS] = "restart-on-failure", | |
1060 | }; | |
1061 | ||
1062 | DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart); | |
1063 | ||
1064 | static const char* const service_type_table[_SERVICE_TYPE_MAX] = { | |
1065 | [SERVICE_FORKING] = "forking", | |
1066 | [SERVICE_SIMPLE] = "simple", | |
1067 | [SERVICE_FINISH] = "finish" | |
1068 | }; | |
1069 | ||
1070 | DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); | |
1071 | ||
1072 | static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = { | |
1073 | [SERVICE_EXEC_START_PRE] = "ExecStartPre", | |
1074 | [SERVICE_EXEC_START] = "ExecStart", | |
1075 | [SERVICE_EXEC_START_POST] = "ExecStartPost", | |
1076 | [SERVICE_EXEC_RELOAD] = "ExecReload", | |
1077 | [SERVICE_EXEC_STOP] = "ExecStop", | |
1078 | [SERVICE_EXEC_STOP_POST] = "ExecStopPost", | |
1079 | }; | |
1080 | ||
1081 | DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); | |
1082 | ||
87f0e418 | 1083 | const UnitVTable service_vtable = { |
5cb5a6ff LP |
1084 | .suffix = ".service", |
1085 | ||
034c6ed7 LP |
1086 | .init = service_init, |
1087 | .done = service_done, | |
1088 | ||
5cb5a6ff LP |
1089 | .dump = service_dump, |
1090 | ||
1091 | .start = service_start, | |
1092 | .stop = service_stop, | |
1093 | .reload = service_reload, | |
1094 | ||
034c6ed7 LP |
1095 | .can_reload = service_can_reload, |
1096 | ||
5cb5a6ff LP |
1097 | .active_state = service_active_state, |
1098 | ||
034c6ed7 LP |
1099 | .sigchld_event = service_sigchld_event, |
1100 | .timer_event = service_timer_event, | |
5cb5a6ff | 1101 | }; |