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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 | ||
ceee3d82 LP |
201 | static int service_notify_sockets(Service *s) { |
202 | Iterator i; | |
203 | char *t; | |
204 | ||
205 | assert(s); | |
206 | ||
207 | SET_FOREACH(t, UNIT(s)->meta.names, i) { | |
208 | char *k; | |
209 | Unit *p; | |
210 | ||
211 | /* Look for all socket objects that go by any of our | |
212 | * units and collect their fds */ | |
213 | ||
214 | if (!(k = unit_name_change_suffix(t, ".socket"))) | |
215 | return -ENOMEM; | |
216 | ||
217 | p = manager_get_unit(UNIT(s)->meta.manager, k); | |
218 | free(k); | |
219 | ||
220 | if (!p) | |
221 | continue; | |
222 | ||
223 | socket_notify_service_dead(SOCKET(p)); | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
034c6ed7 LP |
229 | static void service_set_state(Service *s, ServiceState state) { |
230 | ServiceState old_state; | |
5cb5a6ff LP |
231 | assert(s); |
232 | ||
034c6ed7 | 233 | old_state = s->state; |
5cb5a6ff | 234 | s->state = state; |
034c6ed7 LP |
235 | |
236 | if (state != SERVICE_START_PRE && | |
237 | state != SERVICE_START && | |
238 | state != SERVICE_START_POST && | |
239 | state != SERVICE_RELOAD && | |
240 | state != SERVICE_STOP && | |
241 | state != SERVICE_STOP_SIGTERM && | |
242 | state != SERVICE_STOP_SIGKILL && | |
243 | state != SERVICE_STOP_POST && | |
244 | state != SERVICE_FINAL_SIGTERM && | |
245 | state != SERVICE_FINAL_SIGKILL && | |
246 | state != SERVICE_AUTO_RESTART) | |
acbb0225 | 247 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
248 | |
249 | if (state != SERVICE_START_POST && | |
250 | state != SERVICE_RUNNING && | |
251 | state != SERVICE_RELOAD && | |
252 | state != SERVICE_STOP && | |
253 | state != SERVICE_STOP_SIGTERM && | |
254 | state != SERVICE_STOP_SIGKILL) | |
acbb0225 | 255 | if (s->main_pid > 0) { |
87f0e418 | 256 | unit_unwatch_pid(UNIT(s), s->main_pid); |
034c6ed7 LP |
257 | s->main_pid = 0; |
258 | } | |
259 | ||
260 | if (state != SERVICE_START_PRE && | |
261 | state != SERVICE_START && | |
262 | state != SERVICE_START_POST && | |
263 | state != SERVICE_RELOAD && | |
264 | state != SERVICE_STOP && | |
265 | state != SERVICE_STOP_SIGTERM && | |
266 | state != SERVICE_STOP_SIGKILL && | |
267 | state != SERVICE_STOP_POST && | |
268 | state != SERVICE_FINAL_SIGTERM && | |
269 | state != SERVICE_FINAL_SIGKILL) | |
acbb0225 | 270 | if (s->control_pid > 0) { |
87f0e418 | 271 | unit_unwatch_pid(UNIT(s), s->control_pid); |
034c6ed7 LP |
272 | s->control_pid = 0; |
273 | } | |
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_POST) | |
281 | s->control_command = NULL; | |
282 | ||
ceee3d82 LP |
283 | if (state == SERVICE_DEAD || |
284 | state == SERVICE_STOP || | |
285 | state == SERVICE_STOP_SIGTERM || | |
286 | state == SERVICE_STOP_SIGKILL || | |
287 | state == SERVICE_STOP_POST || | |
288 | state == SERVICE_FINAL_SIGTERM || | |
289 | state == SERVICE_FINAL_SIGKILL || | |
290 | state == SERVICE_MAINTAINANCE || | |
291 | state == SERVICE_AUTO_RESTART) | |
292 | service_notify_sockets(s); | |
293 | ||
acbb0225 LP |
294 | log_debug("%s changing %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]); |
295 | ||
296 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
034c6ed7 LP |
297 | } |
298 | ||
44d8db9e LP |
299 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { |
300 | Iterator i; | |
301 | int r; | |
302 | int *rfds = NULL; | |
303 | unsigned rn_fds = 0; | |
304 | char *t; | |
305 | ||
306 | assert(s); | |
307 | assert(fds); | |
308 | assert(n_fds); | |
309 | ||
87f0e418 | 310 | SET_FOREACH(t, UNIT(s)->meta.names, i) { |
44d8db9e | 311 | char *k; |
87f0e418 | 312 | Unit *p; |
44d8db9e LP |
313 | int *cfds; |
314 | unsigned cn_fds; | |
315 | ||
316 | /* Look for all socket objects that go by any of our | |
87f0e418 | 317 | * units and collect their fds */ |
44d8db9e | 318 | |
87f0e418 | 319 | if (!(k = unit_name_change_suffix(t, ".socket"))) { |
44d8db9e LP |
320 | r = -ENOMEM; |
321 | goto fail; | |
322 | } | |
323 | ||
87f0e418 | 324 | p = manager_get_unit(UNIT(s)->meta.manager, k); |
44d8db9e LP |
325 | free(k); |
326 | ||
b78d0be1 LP |
327 | if (!p) |
328 | continue; | |
329 | ||
44d8db9e LP |
330 | if ((r = socket_collect_fds(SOCKET(p), &cfds, &cn_fds)) < 0) |
331 | goto fail; | |
332 | ||
333 | if (!cfds) | |
334 | continue; | |
335 | ||
336 | if (!rfds) { | |
337 | rfds = cfds; | |
338 | rn_fds = cn_fds; | |
339 | } else { | |
340 | int *t; | |
341 | ||
342 | if (!(t = new(int, rn_fds+cn_fds))) { | |
343 | free(cfds); | |
344 | r = -ENOMEM; | |
345 | goto fail; | |
346 | } | |
347 | ||
348 | memcpy(t, rfds, rn_fds); | |
349 | memcpy(t+rn_fds, cfds, cn_fds); | |
350 | free(rfds); | |
351 | free(cfds); | |
352 | ||
353 | rfds = t; | |
354 | rn_fds = rn_fds+cn_fds; | |
355 | } | |
356 | } | |
357 | ||
358 | *fds = rfds; | |
359 | *n_fds = rn_fds; | |
360 | return 0; | |
361 | ||
362 | fail: | |
363 | free(rfds); | |
364 | return r; | |
365 | } | |
366 | ||
367 | static int service_spawn(Service *s, ExecCommand *c, bool timeout, bool pass_fds, pid_t *_pid) { | |
034c6ed7 LP |
368 | pid_t pid; |
369 | int r; | |
44d8db9e LP |
370 | int *fds = NULL; |
371 | unsigned n_fds = 0; | |
034c6ed7 LP |
372 | |
373 | assert(s); | |
374 | assert(c); | |
375 | assert(_pid); | |
376 | ||
44d8db9e LP |
377 | if (pass_fds) |
378 | if ((r = service_collect_fds(s, &fds, &n_fds)) < 0) | |
379 | goto fail; | |
380 | ||
034c6ed7 | 381 | if (timeout) { |
acbb0225 | 382 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
383 | goto fail; |
384 | } else | |
acbb0225 | 385 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 | 386 | |
44d8db9e | 387 | if ((r = exec_spawn(c, &s->exec_context, fds, n_fds, &pid)) < 0) |
034c6ed7 LP |
388 | goto fail; |
389 | ||
87f0e418 | 390 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
391 | /* FIXME: we need to do something here */ |
392 | goto fail; | |
393 | ||
44d8db9e | 394 | free(fds); |
034c6ed7 LP |
395 | *_pid = pid; |
396 | ||
5cb5a6ff | 397 | return 0; |
034c6ed7 LP |
398 | |
399 | fail: | |
44d8db9e LP |
400 | free(fds); |
401 | ||
034c6ed7 | 402 | if (timeout) |
acbb0225 | 403 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
404 | |
405 | return r; | |
406 | } | |
407 | ||
408 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
409 | int r; | |
410 | assert(s); | |
411 | ||
412 | if (!success) | |
413 | s->failure = true; | |
414 | ||
415 | if (allow_restart && | |
416 | (s->restart == SERVICE_RESTART_ALWAYS || | |
417 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
418 | ||
acbb0225 | 419 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
420 | goto fail; |
421 | ||
422 | service_set_state(s, SERVICE_AUTO_RESTART); | |
423 | } else | |
424 | service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); | |
425 | ||
426 | return; | |
427 | ||
428 | fail: | |
87f0e418 | 429 | log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
430 | service_enter_dead(s, false, false); |
431 | } | |
432 | ||
433 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
434 | ||
435 | static void service_enter_stop_post(Service *s, bool success) { | |
436 | int r; | |
437 | assert(s); | |
438 | ||
439 | if (!success) | |
440 | s->failure = true; | |
441 | ||
442 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) { | |
443 | ||
44d8db9e | 444 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
445 | goto fail; |
446 | ||
447 | service_set_state(s, SERVICE_STOP_POST); | |
448 | } else | |
449 | service_enter_dead(s, true, true); | |
450 | ||
451 | return; | |
452 | ||
453 | fail: | |
87f0e418 | 454 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
455 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
456 | } | |
457 | ||
458 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
459 | int r; | |
460 | bool sent = false; | |
461 | ||
462 | assert(s); | |
463 | ||
464 | if (!success) | |
465 | s->failure = true; | |
466 | ||
467 | if (s->main_pid > 0 || s->control_pid > 0) { | |
468 | int sig; | |
469 | ||
470 | sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL; | |
471 | ||
472 | r = 0; | |
473 | if (s->main_pid > 0) { | |
474 | if (kill(s->main_pid, sig) < 0 && errno != ESRCH) | |
475 | r = -errno; | |
476 | else | |
477 | sent = true; | |
478 | } | |
479 | ||
480 | if (s->control_pid > 0) { | |
481 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) | |
482 | r = -errno; | |
483 | else | |
484 | sent = true; | |
485 | } | |
486 | ||
487 | if (r < 0) | |
488 | goto fail; | |
489 | ||
490 | service_set_state(s, state); | |
491 | } else | |
492 | service_enter_dead(s, true, true); | |
493 | ||
494 | return; | |
495 | ||
496 | fail: | |
87f0e418 | 497 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
498 | |
499 | if (sent) { | |
500 | s->failure = true; | |
501 | service_set_state(s, state); | |
502 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
503 | service_enter_stop_post(s, false); | |
504 | else | |
505 | service_enter_dead(s, false, true); | |
506 | } | |
507 | ||
508 | static void service_enter_stop(Service *s, bool success) { | |
509 | int r; | |
510 | assert(s); | |
511 | ||
512 | if (!success) | |
513 | s->failure = true; | |
514 | ||
515 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) { | |
516 | ||
44d8db9e | 517 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
518 | goto fail; |
519 | ||
520 | service_set_state(s, SERVICE_STOP); | |
521 | } else | |
522 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); | |
523 | ||
524 | return; | |
525 | ||
526 | fail: | |
87f0e418 | 527 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
528 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
529 | } | |
530 | ||
531 | static void service_enter_start_post(Service *s) { | |
532 | int r; | |
533 | assert(s); | |
534 | ||
535 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) { | |
536 | ||
44d8db9e | 537 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
538 | goto fail; |
539 | ||
540 | service_set_state(s, SERVICE_START_POST); | |
541 | } else | |
542 | service_set_state(s, SERVICE_RUNNING); | |
543 | ||
544 | return; | |
545 | ||
546 | fail: | |
87f0e418 | 547 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
548 | service_enter_stop(s, false); |
549 | } | |
550 | ||
551 | static void service_enter_start(Service *s) { | |
552 | pid_t pid; | |
553 | int r; | |
554 | ||
555 | assert(s); | |
556 | ||
557 | assert(s->exec_command[SERVICE_EXEC_START]); | |
558 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next); | |
559 | ||
44d8db9e | 560 | if ((r = service_spawn(s, s->exec_command[SERVICE_EXEC_START], s->type == SERVICE_FORKING, true, &pid)) < 0) |
034c6ed7 LP |
561 | goto fail; |
562 | ||
563 | if (s->type == SERVICE_SIMPLE) { | |
564 | /* For simple services we immediately start | |
565 | * the START_POST binaries. */ | |
566 | ||
567 | s->main_pid = pid; | |
568 | s->main_pid_known = true; | |
569 | service_enter_start_post(s); | |
570 | ||
571 | } else if (s->type == SERVICE_FORKING) { | |
572 | ||
573 | /* For forking services we wait until the start | |
574 | * process exited. */ | |
575 | ||
576 | s->control_pid = pid; | |
577 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
578 | service_set_state(s, SERVICE_START); | |
579 | } else | |
580 | assert_not_reached("Unknown service type"); | |
581 | ||
582 | return; | |
583 | ||
584 | fail: | |
87f0e418 | 585 | log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
586 | service_enter_stop(s, false); |
587 | } | |
588 | ||
589 | static void service_enter_start_pre(Service *s) { | |
590 | int r; | |
591 | ||
592 | assert(s); | |
593 | ||
594 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) { | |
595 | ||
44d8db9e | 596 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
597 | goto fail; |
598 | ||
599 | service_set_state(s, SERVICE_START_PRE); | |
600 | } else | |
601 | service_enter_start(s); | |
602 | ||
603 | return; | |
604 | ||
605 | fail: | |
87f0e418 | 606 | log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
607 | service_enter_dead(s, false, true); |
608 | } | |
609 | ||
610 | static void service_enter_restart(Service *s) { | |
611 | int r; | |
612 | assert(s); | |
613 | ||
87f0e418 | 614 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0) |
034c6ed7 LP |
615 | goto fail; |
616 | ||
87f0e418 | 617 | log_debug("%s scheduled restart job.", unit_id(UNIT(s))); |
034c6ed7 LP |
618 | service_enter_dead(s, true, false); |
619 | return; | |
620 | ||
621 | fail: | |
622 | ||
87f0e418 | 623 | log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
624 | service_enter_dead(s, false, false); |
625 | } | |
626 | ||
627 | static void service_enter_reload(Service *s) { | |
628 | int r; | |
629 | ||
630 | assert(s); | |
631 | ||
632 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) { | |
633 | ||
44d8db9e | 634 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
635 | goto fail; |
636 | ||
637 | service_set_state(s, SERVICE_RELOAD); | |
638 | } else | |
639 | service_set_state(s, SERVICE_RUNNING); | |
640 | ||
641 | return; | |
642 | ||
643 | fail: | |
87f0e418 | 644 | log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
645 | service_enter_stop(s, false); |
646 | } | |
647 | ||
648 | static void service_run_next(Service *s, bool success) { | |
649 | int r; | |
650 | ||
651 | assert(s); | |
652 | assert(s->control_command); | |
653 | assert(s->control_command->command_next); | |
654 | ||
655 | if (!success) | |
656 | s->failure = true; | |
657 | ||
658 | s->control_command = s->control_command->command_next; | |
659 | ||
44d8db9e | 660 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
661 | goto fail; |
662 | ||
663 | return; | |
664 | ||
665 | fail: | |
87f0e418 | 666 | log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
667 | |
668 | if (s->state == SERVICE_STOP) | |
669 | service_enter_stop_post(s, false); | |
670 | else if (s->state == SERVICE_STOP_POST) | |
671 | service_enter_dead(s, false, true); | |
672 | else | |
673 | service_enter_stop(s, false); | |
5cb5a6ff LP |
674 | } |
675 | ||
87f0e418 LP |
676 | static int service_start(Unit *u) { |
677 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
678 | |
679 | assert(s); | |
680 | ||
034c6ed7 LP |
681 | /* We cannot fulfill this request right now, try again later |
682 | * please! */ | |
683 | if (s->state == SERVICE_STOP || | |
684 | s->state == SERVICE_STOP_SIGTERM || | |
685 | s->state == SERVICE_STOP_SIGKILL || | |
686 | s->state == SERVICE_STOP_POST || | |
687 | s->state == SERVICE_FINAL_SIGTERM || | |
688 | s->state == SERVICE_FINAL_SIGKILL) | |
5cb5a6ff LP |
689 | return -EAGAIN; |
690 | ||
034c6ed7 LP |
691 | /* Already on it! */ |
692 | if (s->state == SERVICE_START_PRE || | |
693 | s->state == SERVICE_START || | |
694 | s->state == SERVICE_START_POST) | |
695 | return 0; | |
696 | ||
697 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); | |
5cb5a6ff | 698 | |
034c6ed7 LP |
699 | s->failure = false; |
700 | s->main_pid_known = false; | |
701 | ||
702 | service_enter_start_pre(s); | |
703 | return 0; | |
5cb5a6ff LP |
704 | } |
705 | ||
87f0e418 LP |
706 | static int service_stop(Unit *u) { |
707 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
708 | |
709 | assert(s); | |
710 | ||
034c6ed7 LP |
711 | if (s->state == SERVICE_START_PRE || |
712 | s->state == SERVICE_START || | |
713 | s->state == SERVICE_START_POST || | |
714 | s->state == SERVICE_RELOAD) | |
715 | return -EAGAIN; | |
716 | ||
717 | if (s->state == SERVICE_AUTO_RESTART) { | |
718 | service_set_state(s, SERVICE_DEAD); | |
719 | return 0; | |
720 | } | |
721 | ||
722 | assert(s->state == SERVICE_RUNNING); | |
5cb5a6ff | 723 | |
034c6ed7 | 724 | service_enter_stop(s, true); |
5cb5a6ff LP |
725 | return 0; |
726 | } | |
727 | ||
87f0e418 LP |
728 | static int service_reload(Unit *u) { |
729 | Service *s = SERVICE(u); | |
034c6ed7 LP |
730 | |
731 | assert(s); | |
732 | ||
733 | assert(s->state == SERVICE_RUNNING); | |
734 | ||
735 | service_enter_reload(s); | |
5cb5a6ff LP |
736 | return 0; |
737 | } | |
738 | ||
87f0e418 LP |
739 | static bool service_can_reload(Unit *u) { |
740 | Service *s = SERVICE(u); | |
034c6ed7 LP |
741 | |
742 | assert(s); | |
743 | ||
744 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
745 | } | |
746 | ||
87f0e418 LP |
747 | static UnitActiveState service_active_state(Unit *u) { |
748 | assert(u); | |
5cb5a6ff | 749 | |
acbb0225 | 750 | return state_translation_table[SERVICE(u)->state]; |
034c6ed7 LP |
751 | } |
752 | ||
753 | static int main_pid_good(Service *s) { | |
754 | assert(s); | |
755 | ||
756 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
757 | * don't know */ | |
758 | ||
759 | /* If we know the pid file, then lets just check if it is | |
760 | * still valid */ | |
761 | if (s->main_pid_known) | |
762 | return s->main_pid > 0; | |
763 | ||
764 | /* We don't know the pid */ | |
765 | return -1; | |
766 | } | |
767 | ||
768 | static bool control_pid_good(Service *s) { | |
769 | assert(s); | |
5cb5a6ff | 770 | |
034c6ed7 | 771 | return s->control_pid > 0; |
5cb5a6ff LP |
772 | } |
773 | ||
87f0e418 LP |
774 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
775 | Service *s = SERVICE(u); | |
034c6ed7 | 776 | bool success; |
5cb5a6ff LP |
777 | |
778 | assert(s); | |
034c6ed7 LP |
779 | assert(pid >= 0); |
780 | ||
bd982a8b | 781 | success = code == CLD_EXITED && status == 0; |
034c6ed7 LP |
782 | s->failure = s->failure || !success; |
783 | ||
784 | if (s->main_pid == pid) { | |
785 | ||
786 | exec_status_fill(&s->main_exec_status, pid, code, status); | |
787 | s->main_pid = 0; | |
788 | ||
789 | if (s->type == SERVICE_SIMPLE) { | |
790 | assert(s->exec_command[SERVICE_EXEC_START]); | |
791 | s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status; | |
792 | } | |
793 | ||
87f0e418 | 794 | log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
795 | |
796 | /* The service exited, so the service is officially | |
797 | * gone. */ | |
798 | ||
799 | switch (s->state) { | |
800 | ||
801 | case SERVICE_START_POST: | |
802 | case SERVICE_RELOAD: | |
803 | case SERVICE_STOP: | |
804 | /* Need to wait until the operation is | |
805 | * done */ | |
806 | break; | |
807 | ||
808 | case SERVICE_RUNNING: | |
809 | service_enter_stop(s, success); | |
810 | break; | |
811 | ||
812 | case SERVICE_STOP_SIGTERM: | |
813 | case SERVICE_STOP_SIGKILL: | |
814 | ||
815 | if (!control_pid_good(s)) | |
816 | service_enter_stop_post(s, success); | |
5cb5a6ff | 817 | |
034c6ed7 LP |
818 | /* If there is still a control process, wait for that first */ |
819 | break; | |
5cb5a6ff | 820 | |
034c6ed7 LP |
821 | default: |
822 | assert_not_reached("Uh, main process died at wrong time."); | |
823 | } | |
5cb5a6ff | 824 | |
034c6ed7 LP |
825 | } else if (s->control_pid == pid) { |
826 | assert(s->control_command); | |
827 | ||
828 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
829 | s->control_pid = 0; | |
830 | ||
87f0e418 | 831 | log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
832 | |
833 | /* If we are shutting things down anyway we | |
834 | * don't care about failing commands. */ | |
835 | ||
836 | if (s->control_command->command_next && | |
837 | (success || (s->state == SERVICE_EXEC_STOP || s->state == SERVICE_EXEC_STOP_POST))) | |
838 | ||
839 | /* There is another command to * | |
840 | * execute, so let's do that. */ | |
841 | ||
842 | service_run_next(s, success); | |
843 | ||
844 | else { | |
845 | /* No further commands for this step, so let's | |
846 | * figure out what to do next */ | |
847 | ||
bd982a8b LP |
848 | log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]); |
849 | ||
034c6ed7 LP |
850 | switch (s->state) { |
851 | ||
852 | case SERVICE_START_PRE: | |
853 | if (success) | |
854 | service_enter_start(s); | |
855 | else | |
856 | service_enter_stop(s, false); | |
857 | break; | |
858 | ||
859 | case SERVICE_START: | |
860 | assert(s->type == SERVICE_FORKING); | |
861 | ||
862 | /* Let's try to load the pid | |
863 | * file here if we can. We | |
864 | * ignore the return value, | |
865 | * since the PID file might | |
866 | * actually be created by a | |
867 | * START_POST script */ | |
868 | ||
869 | if (success) { | |
870 | if (s->pid_file) | |
871 | service_load_pid_file(s); | |
872 | ||
873 | service_enter_start_post(s); | |
874 | } else | |
875 | service_enter_stop(s, false); | |
876 | ||
877 | break; | |
878 | ||
879 | case SERVICE_START_POST: | |
880 | if (success && s->pid_file && !s->main_pid_known) { | |
881 | int r; | |
882 | ||
883 | /* Hmm, let's see if we can | |
884 | * load the pid now after the | |
885 | * start-post scripts got | |
886 | * executed. */ | |
887 | ||
888 | if ((r = service_load_pid_file(s)) < 0) | |
87f0e418 | 889 | log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r)); |
034c6ed7 LP |
890 | } |
891 | ||
892 | /* Fall through */ | |
893 | ||
894 | case SERVICE_RELOAD: | |
895 | if (success) { | |
896 | if (main_pid_good(s) != 0) | |
897 | service_set_state(s, SERVICE_RUNNING); | |
898 | else | |
899 | service_enter_stop(s, true); | |
900 | } else | |
901 | service_enter_stop(s, false); | |
902 | ||
903 | break; | |
904 | ||
905 | case SERVICE_STOP: | |
906 | if (main_pid_good(s) > 0) | |
907 | /* Still not dead and we know the PID? Let's go hunting. */ | |
908 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
909 | else | |
910 | service_enter_stop_post(s, success); | |
911 | break; | |
912 | ||
913 | case SERVICE_STOP_SIGTERM: | |
914 | case SERVICE_STOP_SIGKILL: | |
915 | if (main_pid_good(s) <= 0) | |
916 | service_enter_stop_post(s, success); | |
917 | ||
918 | /* If there is still a service | |
919 | * process around, wait until | |
920 | * that one quit, too */ | |
921 | break; | |
922 | ||
923 | case SERVICE_STOP_POST: | |
924 | case SERVICE_FINAL_SIGTERM: | |
925 | case SERVICE_FINAL_SIGKILL: | |
926 | service_enter_dead(s, success, true); | |
927 | break; | |
928 | ||
929 | default: | |
930 | assert_not_reached("Uh, control process died at wrong time."); | |
931 | } | |
932 | } | |
933 | } else | |
934 | assert_not_reached("Got SIGCHLD for unkown PID"); | |
935 | } | |
936 | ||
acbb0225 | 937 | static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { |
87f0e418 | 938 | Service *s = SERVICE(u); |
034c6ed7 LP |
939 | |
940 | assert(s); | |
941 | assert(elapsed == 1); | |
942 | ||
acbb0225 | 943 | assert(w == &s->timer_watch); |
034c6ed7 LP |
944 | |
945 | switch (s->state) { | |
946 | ||
947 | case SERVICE_START_PRE: | |
948 | case SERVICE_START: | |
949 | case SERVICE_START_POST: | |
950 | case SERVICE_RELOAD: | |
87f0e418 | 951 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
952 | service_enter_stop(s, false); |
953 | break; | |
954 | ||
955 | case SERVICE_STOP: | |
87f0e418 | 956 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
957 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
958 | break; | |
959 | ||
960 | case SERVICE_STOP_SIGTERM: | |
87f0e418 | 961 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
962 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); |
963 | break; | |
964 | ||
965 | case SERVICE_STOP_SIGKILL: | |
966 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
967 | * Must be something we cannot kill, so let's just be | |
968 | * weirded out and continue */ | |
969 | ||
87f0e418 | 970 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
971 | service_enter_stop_post(s, false); |
972 | break; | |
973 | ||
974 | case SERVICE_STOP_POST: | |
87f0e418 | 975 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
976 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
977 | break; | |
978 | ||
979 | case SERVICE_FINAL_SIGTERM: | |
87f0e418 | 980 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
981 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); |
982 | break; | |
983 | ||
984 | case SERVICE_FINAL_SIGKILL: | |
87f0e418 | 985 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
986 | service_enter_dead(s, false, true); |
987 | break; | |
988 | ||
989 | case SERVICE_AUTO_RESTART: | |
87f0e418 | 990 | log_debug("%s holdoff time over, scheduling restart.", unit_id(u)); |
034c6ed7 LP |
991 | service_enter_restart(s); |
992 | break; | |
993 | ||
994 | default: | |
995 | assert_not_reached("Timeout at wrong time."); | |
996 | } | |
5cb5a6ff LP |
997 | } |
998 | ||
87f0e418 | 999 | const UnitVTable service_vtable = { |
5cb5a6ff LP |
1000 | .suffix = ".service", |
1001 | ||
034c6ed7 LP |
1002 | .init = service_init, |
1003 | .done = service_done, | |
1004 | ||
5cb5a6ff LP |
1005 | .dump = service_dump, |
1006 | ||
1007 | .start = service_start, | |
1008 | .stop = service_stop, | |
1009 | .reload = service_reload, | |
1010 | ||
034c6ed7 LP |
1011 | .can_reload = service_can_reload, |
1012 | ||
5cb5a6ff LP |
1013 | .active_state = service_active_state, |
1014 | ||
034c6ed7 LP |
1015 | .sigchld_event = service_sigchld_event, |
1016 | .timer_event = service_timer_event, | |
5cb5a6ff | 1017 | }; |