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