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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 | ||
201 | static void service_set_state(Service *s, ServiceState state) { | |
202 | ServiceState old_state; | |
5cb5a6ff LP |
203 | assert(s); |
204 | ||
034c6ed7 | 205 | old_state = s->state; |
5cb5a6ff | 206 | s->state = state; |
034c6ed7 LP |
207 | |
208 | if (state != SERVICE_START_PRE && | |
209 | state != SERVICE_START && | |
210 | state != SERVICE_START_POST && | |
211 | state != SERVICE_RELOAD && | |
212 | state != SERVICE_STOP && | |
213 | state != SERVICE_STOP_SIGTERM && | |
214 | state != SERVICE_STOP_SIGKILL && | |
215 | state != SERVICE_STOP_POST && | |
216 | state != SERVICE_FINAL_SIGTERM && | |
217 | state != SERVICE_FINAL_SIGKILL && | |
218 | state != SERVICE_AUTO_RESTART) | |
acbb0225 | 219 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
220 | |
221 | if (state != SERVICE_START_POST && | |
222 | state != SERVICE_RUNNING && | |
223 | state != SERVICE_RELOAD && | |
224 | state != SERVICE_STOP && | |
225 | state != SERVICE_STOP_SIGTERM && | |
226 | state != SERVICE_STOP_SIGKILL) | |
acbb0225 | 227 | if (s->main_pid > 0) { |
87f0e418 | 228 | unit_unwatch_pid(UNIT(s), s->main_pid); |
034c6ed7 LP |
229 | s->main_pid = 0; |
230 | } | |
231 | ||
232 | if (state != SERVICE_START_PRE && | |
233 | state != SERVICE_START && | |
234 | state != SERVICE_START_POST && | |
235 | state != SERVICE_RELOAD && | |
236 | state != SERVICE_STOP && | |
237 | state != SERVICE_STOP_SIGTERM && | |
238 | state != SERVICE_STOP_SIGKILL && | |
239 | state != SERVICE_STOP_POST && | |
240 | state != SERVICE_FINAL_SIGTERM && | |
241 | state != SERVICE_FINAL_SIGKILL) | |
acbb0225 | 242 | if (s->control_pid > 0) { |
87f0e418 | 243 | unit_unwatch_pid(UNIT(s), s->control_pid); |
034c6ed7 LP |
244 | s->control_pid = 0; |
245 | } | |
246 | ||
247 | if (state != SERVICE_START_PRE && | |
248 | state != SERVICE_START && | |
249 | state != SERVICE_START_POST && | |
250 | state != SERVICE_RELOAD && | |
251 | state != SERVICE_STOP && | |
252 | state != SERVICE_STOP_POST) | |
253 | s->control_command = NULL; | |
254 | ||
acbb0225 LP |
255 | log_debug("%s changing %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]); |
256 | ||
257 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]); | |
034c6ed7 LP |
258 | } |
259 | ||
44d8db9e LP |
260 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { |
261 | Iterator i; | |
262 | int r; | |
263 | int *rfds = NULL; | |
264 | unsigned rn_fds = 0; | |
265 | char *t; | |
266 | ||
267 | assert(s); | |
268 | assert(fds); | |
269 | assert(n_fds); | |
270 | ||
87f0e418 | 271 | SET_FOREACH(t, UNIT(s)->meta.names, i) { |
44d8db9e | 272 | char *k; |
87f0e418 | 273 | Unit *p; |
44d8db9e LP |
274 | int *cfds; |
275 | unsigned cn_fds; | |
276 | ||
277 | /* Look for all socket objects that go by any of our | |
87f0e418 | 278 | * units and collect their fds */ |
44d8db9e | 279 | |
87f0e418 | 280 | if (!(k = unit_name_change_suffix(t, ".socket"))) { |
44d8db9e LP |
281 | r = -ENOMEM; |
282 | goto fail; | |
283 | } | |
284 | ||
87f0e418 | 285 | p = manager_get_unit(UNIT(s)->meta.manager, k); |
44d8db9e LP |
286 | free(k); |
287 | ||
b78d0be1 LP |
288 | if (!p) |
289 | continue; | |
290 | ||
44d8db9e LP |
291 | if ((r = socket_collect_fds(SOCKET(p), &cfds, &cn_fds)) < 0) |
292 | goto fail; | |
293 | ||
294 | if (!cfds) | |
295 | continue; | |
296 | ||
297 | if (!rfds) { | |
298 | rfds = cfds; | |
299 | rn_fds = cn_fds; | |
300 | } else { | |
301 | int *t; | |
302 | ||
303 | if (!(t = new(int, rn_fds+cn_fds))) { | |
304 | free(cfds); | |
305 | r = -ENOMEM; | |
306 | goto fail; | |
307 | } | |
308 | ||
309 | memcpy(t, rfds, rn_fds); | |
310 | memcpy(t+rn_fds, cfds, cn_fds); | |
311 | free(rfds); | |
312 | free(cfds); | |
313 | ||
314 | rfds = t; | |
315 | rn_fds = rn_fds+cn_fds; | |
316 | } | |
317 | } | |
318 | ||
319 | *fds = rfds; | |
320 | *n_fds = rn_fds; | |
321 | return 0; | |
322 | ||
323 | fail: | |
324 | free(rfds); | |
325 | return r; | |
326 | } | |
327 | ||
328 | static int service_spawn(Service *s, ExecCommand *c, bool timeout, bool pass_fds, pid_t *_pid) { | |
034c6ed7 LP |
329 | pid_t pid; |
330 | int r; | |
44d8db9e LP |
331 | int *fds = NULL; |
332 | unsigned n_fds = 0; | |
034c6ed7 LP |
333 | |
334 | assert(s); | |
335 | assert(c); | |
336 | assert(_pid); | |
337 | ||
44d8db9e LP |
338 | if (pass_fds) |
339 | if ((r = service_collect_fds(s, &fds, &n_fds)) < 0) | |
340 | goto fail; | |
341 | ||
034c6ed7 | 342 | if (timeout) { |
acbb0225 | 343 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
344 | goto fail; |
345 | } else | |
acbb0225 | 346 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 | 347 | |
44d8db9e | 348 | if ((r = exec_spawn(c, &s->exec_context, fds, n_fds, &pid)) < 0) |
034c6ed7 LP |
349 | goto fail; |
350 | ||
87f0e418 | 351 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
352 | /* FIXME: we need to do something here */ |
353 | goto fail; | |
354 | ||
44d8db9e | 355 | free(fds); |
034c6ed7 LP |
356 | *_pid = pid; |
357 | ||
5cb5a6ff | 358 | return 0; |
034c6ed7 LP |
359 | |
360 | fail: | |
44d8db9e LP |
361 | free(fds); |
362 | ||
034c6ed7 | 363 | if (timeout) |
acbb0225 | 364 | unit_unwatch_timer(UNIT(s), &s->timer_watch); |
034c6ed7 LP |
365 | |
366 | return r; | |
367 | } | |
368 | ||
369 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
370 | int r; | |
371 | assert(s); | |
372 | ||
373 | if (!success) | |
374 | s->failure = true; | |
375 | ||
376 | if (allow_restart && | |
377 | (s->restart == SERVICE_RESTART_ALWAYS || | |
378 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
379 | ||
acbb0225 | 380 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0) |
034c6ed7 LP |
381 | goto fail; |
382 | ||
383 | service_set_state(s, SERVICE_AUTO_RESTART); | |
384 | } else | |
385 | service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); | |
386 | ||
387 | return; | |
388 | ||
389 | fail: | |
87f0e418 | 390 | log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
391 | service_enter_dead(s, false, false); |
392 | } | |
393 | ||
394 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
395 | ||
396 | static void service_enter_stop_post(Service *s, bool success) { | |
397 | int r; | |
398 | assert(s); | |
399 | ||
400 | if (!success) | |
401 | s->failure = true; | |
402 | ||
403 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) { | |
404 | ||
44d8db9e | 405 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
406 | goto fail; |
407 | ||
408 | service_set_state(s, SERVICE_STOP_POST); | |
409 | } else | |
410 | service_enter_dead(s, true, true); | |
411 | ||
412 | return; | |
413 | ||
414 | fail: | |
87f0e418 | 415 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
416 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
417 | } | |
418 | ||
419 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
420 | int r; | |
421 | bool sent = false; | |
422 | ||
423 | assert(s); | |
424 | ||
425 | if (!success) | |
426 | s->failure = true; | |
427 | ||
428 | if (s->main_pid > 0 || s->control_pid > 0) { | |
429 | int sig; | |
430 | ||
431 | sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL; | |
432 | ||
433 | r = 0; | |
434 | if (s->main_pid > 0) { | |
435 | if (kill(s->main_pid, sig) < 0 && errno != ESRCH) | |
436 | r = -errno; | |
437 | else | |
438 | sent = true; | |
439 | } | |
440 | ||
441 | if (s->control_pid > 0) { | |
442 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) | |
443 | r = -errno; | |
444 | else | |
445 | sent = true; | |
446 | } | |
447 | ||
448 | if (r < 0) | |
449 | goto fail; | |
450 | ||
451 | service_set_state(s, state); | |
452 | } else | |
453 | service_enter_dead(s, true, true); | |
454 | ||
455 | return; | |
456 | ||
457 | fail: | |
87f0e418 | 458 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
459 | |
460 | if (sent) { | |
461 | s->failure = true; | |
462 | service_set_state(s, state); | |
463 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
464 | service_enter_stop_post(s, false); | |
465 | else | |
466 | service_enter_dead(s, false, true); | |
467 | } | |
468 | ||
469 | static void service_enter_stop(Service *s, bool success) { | |
470 | int r; | |
471 | assert(s); | |
472 | ||
473 | if (!success) | |
474 | s->failure = true; | |
475 | ||
476 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) { | |
477 | ||
44d8db9e | 478 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
479 | goto fail; |
480 | ||
481 | service_set_state(s, SERVICE_STOP); | |
482 | } else | |
483 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); | |
484 | ||
485 | return; | |
486 | ||
487 | fail: | |
87f0e418 | 488 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
489 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
490 | } | |
491 | ||
492 | static void service_enter_start_post(Service *s) { | |
493 | int r; | |
494 | assert(s); | |
495 | ||
496 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) { | |
497 | ||
44d8db9e | 498 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
499 | goto fail; |
500 | ||
501 | service_set_state(s, SERVICE_START_POST); | |
502 | } else | |
503 | service_set_state(s, SERVICE_RUNNING); | |
504 | ||
505 | return; | |
506 | ||
507 | fail: | |
87f0e418 | 508 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
509 | service_enter_stop(s, false); |
510 | } | |
511 | ||
512 | static void service_enter_start(Service *s) { | |
513 | pid_t pid; | |
514 | int r; | |
515 | ||
516 | assert(s); | |
517 | ||
518 | assert(s->exec_command[SERVICE_EXEC_START]); | |
519 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next); | |
520 | ||
44d8db9e | 521 | if ((r = service_spawn(s, s->exec_command[SERVICE_EXEC_START], s->type == SERVICE_FORKING, true, &pid)) < 0) |
034c6ed7 LP |
522 | goto fail; |
523 | ||
524 | if (s->type == SERVICE_SIMPLE) { | |
525 | /* For simple services we immediately start | |
526 | * the START_POST binaries. */ | |
527 | ||
528 | s->main_pid = pid; | |
529 | s->main_pid_known = true; | |
530 | service_enter_start_post(s); | |
531 | ||
532 | } else if (s->type == SERVICE_FORKING) { | |
533 | ||
534 | /* For forking services we wait until the start | |
535 | * process exited. */ | |
536 | ||
537 | s->control_pid = pid; | |
538 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
539 | service_set_state(s, SERVICE_START); | |
540 | } else | |
541 | assert_not_reached("Unknown service type"); | |
542 | ||
543 | return; | |
544 | ||
545 | fail: | |
87f0e418 | 546 | log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
547 | service_enter_stop(s, false); |
548 | } | |
549 | ||
550 | static void service_enter_start_pre(Service *s) { | |
551 | int r; | |
552 | ||
553 | assert(s); | |
554 | ||
555 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) { | |
556 | ||
44d8db9e | 557 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
558 | goto fail; |
559 | ||
560 | service_set_state(s, SERVICE_START_PRE); | |
561 | } else | |
562 | service_enter_start(s); | |
563 | ||
564 | return; | |
565 | ||
566 | fail: | |
87f0e418 | 567 | log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
568 | service_enter_dead(s, false, true); |
569 | } | |
570 | ||
571 | static void service_enter_restart(Service *s) { | |
572 | int r; | |
573 | assert(s); | |
574 | ||
87f0e418 | 575 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0) |
034c6ed7 LP |
576 | goto fail; |
577 | ||
87f0e418 | 578 | log_debug("%s scheduled restart job.", unit_id(UNIT(s))); |
034c6ed7 LP |
579 | service_enter_dead(s, true, false); |
580 | return; | |
581 | ||
582 | fail: | |
583 | ||
87f0e418 | 584 | log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
585 | service_enter_dead(s, false, false); |
586 | } | |
587 | ||
588 | static void service_enter_reload(Service *s) { | |
589 | int r; | |
590 | ||
591 | assert(s); | |
592 | ||
593 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) { | |
594 | ||
44d8db9e | 595 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
596 | goto fail; |
597 | ||
598 | service_set_state(s, SERVICE_RELOAD); | |
599 | } else | |
600 | service_set_state(s, SERVICE_RUNNING); | |
601 | ||
602 | return; | |
603 | ||
604 | fail: | |
87f0e418 | 605 | log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
606 | service_enter_stop(s, false); |
607 | } | |
608 | ||
609 | static void service_run_next(Service *s, bool success) { | |
610 | int r; | |
611 | ||
612 | assert(s); | |
613 | assert(s->control_command); | |
614 | assert(s->control_command->command_next); | |
615 | ||
616 | if (!success) | |
617 | s->failure = true; | |
618 | ||
619 | s->control_command = s->control_command->command_next; | |
620 | ||
44d8db9e | 621 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
622 | goto fail; |
623 | ||
624 | return; | |
625 | ||
626 | fail: | |
87f0e418 | 627 | log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
628 | |
629 | if (s->state == SERVICE_STOP) | |
630 | service_enter_stop_post(s, false); | |
631 | else if (s->state == SERVICE_STOP_POST) | |
632 | service_enter_dead(s, false, true); | |
633 | else | |
634 | service_enter_stop(s, false); | |
5cb5a6ff LP |
635 | } |
636 | ||
87f0e418 LP |
637 | static int service_start(Unit *u) { |
638 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
639 | |
640 | assert(s); | |
641 | ||
034c6ed7 LP |
642 | /* We cannot fulfill this request right now, try again later |
643 | * please! */ | |
644 | if (s->state == SERVICE_STOP || | |
645 | s->state == SERVICE_STOP_SIGTERM || | |
646 | s->state == SERVICE_STOP_SIGKILL || | |
647 | s->state == SERVICE_STOP_POST || | |
648 | s->state == SERVICE_FINAL_SIGTERM || | |
649 | s->state == SERVICE_FINAL_SIGKILL) | |
5cb5a6ff LP |
650 | return -EAGAIN; |
651 | ||
034c6ed7 LP |
652 | /* Already on it! */ |
653 | if (s->state == SERVICE_START_PRE || | |
654 | s->state == SERVICE_START || | |
655 | s->state == SERVICE_START_POST) | |
656 | return 0; | |
657 | ||
658 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); | |
5cb5a6ff | 659 | |
034c6ed7 LP |
660 | s->failure = false; |
661 | s->main_pid_known = false; | |
662 | ||
663 | service_enter_start_pre(s); | |
664 | return 0; | |
5cb5a6ff LP |
665 | } |
666 | ||
87f0e418 LP |
667 | static int service_stop(Unit *u) { |
668 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
669 | |
670 | assert(s); | |
671 | ||
034c6ed7 LP |
672 | if (s->state == SERVICE_START_PRE || |
673 | s->state == SERVICE_START || | |
674 | s->state == SERVICE_START_POST || | |
675 | s->state == SERVICE_RELOAD) | |
676 | return -EAGAIN; | |
677 | ||
678 | if (s->state == SERVICE_AUTO_RESTART) { | |
679 | service_set_state(s, SERVICE_DEAD); | |
680 | return 0; | |
681 | } | |
682 | ||
683 | assert(s->state == SERVICE_RUNNING); | |
5cb5a6ff | 684 | |
034c6ed7 | 685 | service_enter_stop(s, true); |
5cb5a6ff LP |
686 | return 0; |
687 | } | |
688 | ||
87f0e418 LP |
689 | static int service_reload(Unit *u) { |
690 | Service *s = SERVICE(u); | |
034c6ed7 LP |
691 | |
692 | assert(s); | |
693 | ||
694 | assert(s->state == SERVICE_RUNNING); | |
695 | ||
696 | service_enter_reload(s); | |
5cb5a6ff LP |
697 | return 0; |
698 | } | |
699 | ||
87f0e418 LP |
700 | static bool service_can_reload(Unit *u) { |
701 | Service *s = SERVICE(u); | |
034c6ed7 LP |
702 | |
703 | assert(s); | |
704 | ||
705 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
706 | } | |
707 | ||
87f0e418 LP |
708 | static UnitActiveState service_active_state(Unit *u) { |
709 | assert(u); | |
5cb5a6ff | 710 | |
acbb0225 | 711 | return state_translation_table[SERVICE(u)->state]; |
034c6ed7 LP |
712 | } |
713 | ||
714 | static int main_pid_good(Service *s) { | |
715 | assert(s); | |
716 | ||
717 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
718 | * don't know */ | |
719 | ||
720 | /* If we know the pid file, then lets just check if it is | |
721 | * still valid */ | |
722 | if (s->main_pid_known) | |
723 | return s->main_pid > 0; | |
724 | ||
725 | /* We don't know the pid */ | |
726 | return -1; | |
727 | } | |
728 | ||
729 | static bool control_pid_good(Service *s) { | |
730 | assert(s); | |
5cb5a6ff | 731 | |
034c6ed7 | 732 | return s->control_pid > 0; |
5cb5a6ff LP |
733 | } |
734 | ||
87f0e418 LP |
735 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
736 | Service *s = SERVICE(u); | |
034c6ed7 | 737 | bool success; |
5cb5a6ff LP |
738 | |
739 | assert(s); | |
034c6ed7 LP |
740 | assert(pid >= 0); |
741 | ||
742 | success = code == CLD_EXITED || status == 0; | |
743 | s->failure = s->failure || !success; | |
744 | ||
745 | if (s->main_pid == pid) { | |
746 | ||
747 | exec_status_fill(&s->main_exec_status, pid, code, status); | |
748 | s->main_pid = 0; | |
749 | ||
750 | if (s->type == SERVICE_SIMPLE) { | |
751 | assert(s->exec_command[SERVICE_EXEC_START]); | |
752 | s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status; | |
753 | } | |
754 | ||
87f0e418 | 755 | log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
756 | |
757 | /* The service exited, so the service is officially | |
758 | * gone. */ | |
759 | ||
760 | switch (s->state) { | |
761 | ||
762 | case SERVICE_START_POST: | |
763 | case SERVICE_RELOAD: | |
764 | case SERVICE_STOP: | |
765 | /* Need to wait until the operation is | |
766 | * done */ | |
767 | break; | |
768 | ||
769 | case SERVICE_RUNNING: | |
770 | service_enter_stop(s, success); | |
771 | break; | |
772 | ||
773 | case SERVICE_STOP_SIGTERM: | |
774 | case SERVICE_STOP_SIGKILL: | |
775 | ||
776 | if (!control_pid_good(s)) | |
777 | service_enter_stop_post(s, success); | |
5cb5a6ff | 778 | |
034c6ed7 LP |
779 | /* If there is still a control process, wait for that first */ |
780 | break; | |
5cb5a6ff | 781 | |
034c6ed7 LP |
782 | default: |
783 | assert_not_reached("Uh, main process died at wrong time."); | |
784 | } | |
5cb5a6ff | 785 | |
034c6ed7 LP |
786 | } else if (s->control_pid == pid) { |
787 | assert(s->control_command); | |
788 | ||
789 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
790 | s->control_pid = 0; | |
791 | ||
87f0e418 | 792 | log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
793 | |
794 | /* If we are shutting things down anyway we | |
795 | * don't care about failing commands. */ | |
796 | ||
797 | if (s->control_command->command_next && | |
798 | (success || (s->state == SERVICE_EXEC_STOP || s->state == SERVICE_EXEC_STOP_POST))) | |
799 | ||
800 | /* There is another command to * | |
801 | * execute, so let's do that. */ | |
802 | ||
803 | service_run_next(s, success); | |
804 | ||
805 | else { | |
806 | /* No further commands for this step, so let's | |
807 | * figure out what to do next */ | |
808 | ||
809 | switch (s->state) { | |
810 | ||
811 | case SERVICE_START_PRE: | |
812 | if (success) | |
813 | service_enter_start(s); | |
814 | else | |
815 | service_enter_stop(s, false); | |
816 | break; | |
817 | ||
818 | case SERVICE_START: | |
819 | assert(s->type == SERVICE_FORKING); | |
820 | ||
821 | /* Let's try to load the pid | |
822 | * file here if we can. We | |
823 | * ignore the return value, | |
824 | * since the PID file might | |
825 | * actually be created by a | |
826 | * START_POST script */ | |
827 | ||
828 | if (success) { | |
829 | if (s->pid_file) | |
830 | service_load_pid_file(s); | |
831 | ||
832 | service_enter_start_post(s); | |
833 | } else | |
834 | service_enter_stop(s, false); | |
835 | ||
836 | break; | |
837 | ||
838 | case SERVICE_START_POST: | |
839 | if (success && s->pid_file && !s->main_pid_known) { | |
840 | int r; | |
841 | ||
842 | /* Hmm, let's see if we can | |
843 | * load the pid now after the | |
844 | * start-post scripts got | |
845 | * executed. */ | |
846 | ||
847 | if ((r = service_load_pid_file(s)) < 0) | |
87f0e418 | 848 | log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r)); |
034c6ed7 LP |
849 | } |
850 | ||
851 | /* Fall through */ | |
852 | ||
853 | case SERVICE_RELOAD: | |
854 | if (success) { | |
855 | if (main_pid_good(s) != 0) | |
856 | service_set_state(s, SERVICE_RUNNING); | |
857 | else | |
858 | service_enter_stop(s, true); | |
859 | } else | |
860 | service_enter_stop(s, false); | |
861 | ||
862 | break; | |
863 | ||
864 | case SERVICE_STOP: | |
865 | if (main_pid_good(s) > 0) | |
866 | /* Still not dead and we know the PID? Let's go hunting. */ | |
867 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
868 | else | |
869 | service_enter_stop_post(s, success); | |
870 | break; | |
871 | ||
872 | case SERVICE_STOP_SIGTERM: | |
873 | case SERVICE_STOP_SIGKILL: | |
874 | if (main_pid_good(s) <= 0) | |
875 | service_enter_stop_post(s, success); | |
876 | ||
877 | /* If there is still a service | |
878 | * process around, wait until | |
879 | * that one quit, too */ | |
880 | break; | |
881 | ||
882 | case SERVICE_STOP_POST: | |
883 | case SERVICE_FINAL_SIGTERM: | |
884 | case SERVICE_FINAL_SIGKILL: | |
885 | service_enter_dead(s, success, true); | |
886 | break; | |
887 | ||
888 | default: | |
889 | assert_not_reached("Uh, control process died at wrong time."); | |
890 | } | |
891 | } | |
892 | } else | |
893 | assert_not_reached("Got SIGCHLD for unkown PID"); | |
894 | } | |
895 | ||
acbb0225 | 896 | static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) { |
87f0e418 | 897 | Service *s = SERVICE(u); |
034c6ed7 LP |
898 | |
899 | assert(s); | |
900 | assert(elapsed == 1); | |
901 | ||
acbb0225 | 902 | assert(w == &s->timer_watch); |
034c6ed7 LP |
903 | |
904 | switch (s->state) { | |
905 | ||
906 | case SERVICE_START_PRE: | |
907 | case SERVICE_START: | |
908 | case SERVICE_START_POST: | |
909 | case SERVICE_RELOAD: | |
87f0e418 | 910 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
911 | service_enter_stop(s, false); |
912 | break; | |
913 | ||
914 | case SERVICE_STOP: | |
87f0e418 | 915 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
916 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
917 | break; | |
918 | ||
919 | case SERVICE_STOP_SIGTERM: | |
87f0e418 | 920 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
921 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); |
922 | break; | |
923 | ||
924 | case SERVICE_STOP_SIGKILL: | |
925 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
926 | * Must be something we cannot kill, so let's just be | |
927 | * weirded out and continue */ | |
928 | ||
87f0e418 | 929 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
930 | service_enter_stop_post(s, false); |
931 | break; | |
932 | ||
933 | case SERVICE_STOP_POST: | |
87f0e418 | 934 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
935 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
936 | break; | |
937 | ||
938 | case SERVICE_FINAL_SIGTERM: | |
87f0e418 | 939 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
940 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); |
941 | break; | |
942 | ||
943 | case SERVICE_FINAL_SIGKILL: | |
87f0e418 | 944 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
945 | service_enter_dead(s, false, true); |
946 | break; | |
947 | ||
948 | case SERVICE_AUTO_RESTART: | |
87f0e418 | 949 | log_debug("%s holdoff time over, scheduling restart.", unit_id(u)); |
034c6ed7 LP |
950 | service_enter_restart(s); |
951 | break; | |
952 | ||
953 | default: | |
954 | assert_not_reached("Timeout at wrong time."); | |
955 | } | |
5cb5a6ff LP |
956 | } |
957 | ||
87f0e418 | 958 | const UnitVTable service_vtable = { |
5cb5a6ff LP |
959 | .suffix = ".service", |
960 | ||
034c6ed7 LP |
961 | .init = service_init, |
962 | .done = service_done, | |
963 | ||
5cb5a6ff LP |
964 | .dump = service_dump, |
965 | ||
966 | .start = service_start, | |
967 | .stop = service_stop, | |
968 | .reload = service_reload, | |
969 | ||
034c6ed7 LP |
970 | .can_reload = service_can_reload, |
971 | ||
5cb5a6ff LP |
972 | .active_state = service_active_state, |
973 | ||
034c6ed7 LP |
974 | .sigchld_event = service_sigchld_event, |
975 | .timer_event = service_timer_event, | |
5cb5a6ff | 976 | }; |