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