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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 | ||
87f0e418 LP |
12 | static const UnitActiveState state_table[_SERVICE_STATE_MAX] = { |
13 | [SERVICE_DEAD] = UNIT_INACTIVE, | |
14 | [SERVICE_START_PRE] = UNIT_ACTIVATING, | |
15 | [SERVICE_START] = UNIT_ACTIVATING, | |
16 | [SERVICE_START_POST] = UNIT_ACTIVATING, | |
17 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
18 | [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING, | |
19 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
20 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
21 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
22 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
23 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
24 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
25 | [SERVICE_MAINTAINANCE] = UNIT_INACTIVE, | |
26 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING, | |
034c6ed7 | 27 | }; |
5cb5a6ff | 28 | |
87f0e418 LP |
29 | static void service_done(Unit *u) { |
30 | Service *s = SERVICE(u); | |
44d8db9e LP |
31 | |
32 | assert(s); | |
33 | ||
34 | free(s->pid_file); | |
35 | s->pid_file = NULL; | |
36 | ||
37 | exec_context_done(&s->exec_context); | |
38 | exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX); | |
39 | s->control_command = NULL; | |
40 | ||
41 | /* This will leak a process, but at least no memory or any of | |
42 | * our resources */ | |
43 | if (s->main_pid > 0) { | |
87f0e418 | 44 | unit_unwatch_pid(u, s->main_pid); |
44d8db9e LP |
45 | s->main_pid = 0; |
46 | } | |
47 | ||
48 | if (s->control_pid > 0) { | |
87f0e418 | 49 | unit_unwatch_pid(u, s->control_pid); |
44d8db9e LP |
50 | s->control_pid = 0; |
51 | } | |
52 | ||
87f0e418 | 53 | unit_unwatch_timer(u, &s->timer_id); |
44d8db9e LP |
54 | } |
55 | ||
5cb5a6ff LP |
56 | static int service_load_sysv(Service *s) { |
57 | assert(s); | |
58 | ||
59 | /* Load service data from SysV init scripts, preferably with | |
60 | * LSB headers ... */ | |
61 | ||
62 | return -ENOENT; | |
63 | } | |
64 | ||
87f0e418 | 65 | static int service_init(Unit *u) { |
5cb5a6ff | 66 | int r; |
87f0e418 | 67 | Service *s = SERVICE(u); |
5cb5a6ff LP |
68 | |
69 | assert(s); | |
70 | ||
034c6ed7 LP |
71 | /* First, reset everything to the defaults, in case this is a |
72 | * reload */ | |
73 | ||
74 | s->type = 0; | |
75 | s->restart = 0; | |
76 | ||
77 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; | |
78 | s->restart_usec = DEFAULT_RESTART_USEC; | |
79 | ||
80 | exec_context_init(&s->exec_context); | |
81 | ||
82 | s->timer_id = -1; | |
83 | ||
84 | s->state = SERVICE_DEAD; | |
5cb5a6ff LP |
85 | |
86 | /* Load a .service file */ | |
87f0e418 | 87 | r = unit_load_fragment(u); |
5cb5a6ff LP |
88 | |
89 | /* Load a classic init script as a fallback */ | |
90 | if (r == -ENOENT) | |
91 | r = service_load_sysv(s); | |
92 | ||
44d8db9e | 93 | if (r < 0) { |
87f0e418 | 94 | service_done(u); |
5cb5a6ff | 95 | return r; |
44d8db9e | 96 | } |
5cb5a6ff LP |
97 | |
98 | /* Load dropin directory data */ | |
87f0e418 LP |
99 | if ((r = unit_load_dropin(u)) < 0) { |
100 | service_done(u); | |
5cb5a6ff | 101 | return r; |
034c6ed7 LP |
102 | } |
103 | ||
44d8db9e | 104 | return 0; |
034c6ed7 LP |
105 | } |
106 | ||
87f0e418 | 107 | static void service_dump(Unit *u, FILE *f, const char *prefix) { |
5cb5a6ff LP |
108 | |
109 | static const char* const state_table[_SERVICE_STATE_MAX] = { | |
110 | [SERVICE_DEAD] = "dead", | |
111 | [SERVICE_START_PRE] = "start-pre", | |
112 | [SERVICE_START] = "start", | |
113 | [SERVICE_START_POST] = "post", | |
114 | [SERVICE_RUNNING] = "running", | |
5cb5a6ff | 115 | [SERVICE_RELOAD] = "reload", |
5cb5a6ff | 116 | [SERVICE_STOP] = "stop", |
034c6ed7 LP |
117 | [SERVICE_STOP_SIGTERM] = "stop-sigterm", |
118 | [SERVICE_STOP_SIGKILL] = "stop-sigkill", | |
5cb5a6ff | 119 | [SERVICE_STOP_POST] = "stop-post", |
034c6ed7 LP |
120 | [SERVICE_FINAL_SIGTERM] = "final-sigterm", |
121 | [SERVICE_FINAL_SIGKILL] = "final-sigkill", | |
122 | [SERVICE_MAINTAINANCE] = "maintainance", | |
123 | [SERVICE_AUTO_RESTART] = "auto-restart", | |
5cb5a6ff LP |
124 | }; |
125 | ||
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", | |
147 | prefix, state_table[s->state]); | |
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) | |
87f0e418 | 219 | unit_unwatch_timer(UNIT(s), &s->timer_id); |
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) | |
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) | |
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 | ||
87f0e418 | 255 | unit_notify(UNIT(s), state_table[old_state], state_table[s->state]); |
034c6ed7 LP |
256 | } |
257 | ||
44d8db9e LP |
258 | static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) { |
259 | Iterator i; | |
260 | int r; | |
261 | int *rfds = NULL; | |
262 | unsigned rn_fds = 0; | |
263 | char *t; | |
264 | ||
265 | assert(s); | |
266 | assert(fds); | |
267 | assert(n_fds); | |
268 | ||
87f0e418 | 269 | SET_FOREACH(t, UNIT(s)->meta.names, i) { |
44d8db9e | 270 | char *k; |
87f0e418 | 271 | Unit *p; |
44d8db9e LP |
272 | int *cfds; |
273 | unsigned cn_fds; | |
274 | ||
275 | /* Look for all socket objects that go by any of our | |
87f0e418 | 276 | * units and collect their fds */ |
44d8db9e | 277 | |
87f0e418 | 278 | if (!(k = unit_name_change_suffix(t, ".socket"))) { |
44d8db9e LP |
279 | r = -ENOMEM; |
280 | goto fail; | |
281 | } | |
282 | ||
87f0e418 | 283 | p = manager_get_unit(UNIT(s)->meta.manager, k); |
44d8db9e LP |
284 | free(k); |
285 | ||
286 | if ((r = socket_collect_fds(SOCKET(p), &cfds, &cn_fds)) < 0) | |
287 | goto fail; | |
288 | ||
289 | if (!cfds) | |
290 | continue; | |
291 | ||
292 | if (!rfds) { | |
293 | rfds = cfds; | |
294 | rn_fds = cn_fds; | |
295 | } else { | |
296 | int *t; | |
297 | ||
298 | if (!(t = new(int, rn_fds+cn_fds))) { | |
299 | free(cfds); | |
300 | r = -ENOMEM; | |
301 | goto fail; | |
302 | } | |
303 | ||
304 | memcpy(t, rfds, rn_fds); | |
305 | memcpy(t+rn_fds, cfds, cn_fds); | |
306 | free(rfds); | |
307 | free(cfds); | |
308 | ||
309 | rfds = t; | |
310 | rn_fds = rn_fds+cn_fds; | |
311 | } | |
312 | } | |
313 | ||
314 | *fds = rfds; | |
315 | *n_fds = rn_fds; | |
316 | return 0; | |
317 | ||
318 | fail: | |
319 | free(rfds); | |
320 | return r; | |
321 | } | |
322 | ||
323 | static int service_spawn(Service *s, ExecCommand *c, bool timeout, bool pass_fds, pid_t *_pid) { | |
034c6ed7 LP |
324 | pid_t pid; |
325 | int r; | |
44d8db9e LP |
326 | int *fds = NULL; |
327 | unsigned n_fds = 0; | |
034c6ed7 LP |
328 | |
329 | assert(s); | |
330 | assert(c); | |
331 | assert(_pid); | |
332 | ||
44d8db9e LP |
333 | if (pass_fds) |
334 | if ((r = service_collect_fds(s, &fds, &n_fds)) < 0) | |
335 | goto fail; | |
336 | ||
034c6ed7 | 337 | if (timeout) { |
87f0e418 | 338 | if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_id)) < 0) |
034c6ed7 LP |
339 | goto fail; |
340 | } else | |
87f0e418 | 341 | unit_unwatch_timer(UNIT(s), &s->timer_id); |
034c6ed7 | 342 | |
44d8db9e | 343 | if ((r = exec_spawn(c, &s->exec_context, fds, n_fds, &pid)) < 0) |
034c6ed7 LP |
344 | goto fail; |
345 | ||
87f0e418 | 346 | if ((r = unit_watch_pid(UNIT(s), pid)) < 0) |
034c6ed7 LP |
347 | /* FIXME: we need to do something here */ |
348 | goto fail; | |
349 | ||
44d8db9e | 350 | free(fds); |
034c6ed7 LP |
351 | *_pid = pid; |
352 | ||
5cb5a6ff | 353 | return 0; |
034c6ed7 LP |
354 | |
355 | fail: | |
44d8db9e LP |
356 | free(fds); |
357 | ||
034c6ed7 | 358 | if (timeout) |
87f0e418 | 359 | unit_unwatch_timer(UNIT(s), &s->timer_id); |
034c6ed7 LP |
360 | |
361 | return r; | |
362 | } | |
363 | ||
364 | static void service_enter_dead(Service *s, bool success, bool allow_restart) { | |
365 | int r; | |
366 | assert(s); | |
367 | ||
368 | if (!success) | |
369 | s->failure = true; | |
370 | ||
371 | if (allow_restart && | |
372 | (s->restart == SERVICE_RESTART_ALWAYS || | |
373 | (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) { | |
374 | ||
87f0e418 | 375 | if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_id)) < 0) |
034c6ed7 LP |
376 | goto fail; |
377 | ||
378 | service_set_state(s, SERVICE_AUTO_RESTART); | |
379 | } else | |
380 | service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD); | |
381 | ||
382 | return; | |
383 | ||
384 | fail: | |
87f0e418 | 385 | log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
386 | service_enter_dead(s, false, false); |
387 | } | |
388 | ||
389 | static void service_enter_signal(Service *s, ServiceState state, bool success); | |
390 | ||
391 | static void service_enter_stop_post(Service *s, bool success) { | |
392 | int r; | |
393 | assert(s); | |
394 | ||
395 | if (!success) | |
396 | s->failure = true; | |
397 | ||
398 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) { | |
399 | ||
44d8db9e | 400 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
401 | goto fail; |
402 | ||
403 | service_set_state(s, SERVICE_STOP_POST); | |
404 | } else | |
405 | service_enter_dead(s, true, true); | |
406 | ||
407 | return; | |
408 | ||
409 | fail: | |
87f0e418 | 410 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
411 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
412 | } | |
413 | ||
414 | static void service_enter_signal(Service *s, ServiceState state, bool success) { | |
415 | int r; | |
416 | bool sent = false; | |
417 | ||
418 | assert(s); | |
419 | ||
420 | if (!success) | |
421 | s->failure = true; | |
422 | ||
423 | if (s->main_pid > 0 || s->control_pid > 0) { | |
424 | int sig; | |
425 | ||
426 | sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL; | |
427 | ||
428 | r = 0; | |
429 | if (s->main_pid > 0) { | |
430 | if (kill(s->main_pid, sig) < 0 && errno != ESRCH) | |
431 | r = -errno; | |
432 | else | |
433 | sent = true; | |
434 | } | |
435 | ||
436 | if (s->control_pid > 0) { | |
437 | if (kill(s->control_pid, sig) < 0 && errno != ESRCH) | |
438 | r = -errno; | |
439 | else | |
440 | sent = true; | |
441 | } | |
442 | ||
443 | if (r < 0) | |
444 | goto fail; | |
445 | ||
446 | service_set_state(s, state); | |
447 | } else | |
448 | service_enter_dead(s, true, true); | |
449 | ||
450 | return; | |
451 | ||
452 | fail: | |
87f0e418 | 453 | log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
454 | |
455 | if (sent) { | |
456 | s->failure = true; | |
457 | service_set_state(s, state); | |
458 | } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL) | |
459 | service_enter_stop_post(s, false); | |
460 | else | |
461 | service_enter_dead(s, false, true); | |
462 | } | |
463 | ||
464 | static void service_enter_stop(Service *s, bool success) { | |
465 | int r; | |
466 | assert(s); | |
467 | ||
468 | if (!success) | |
469 | s->failure = true; | |
470 | ||
471 | if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) { | |
472 | ||
44d8db9e | 473 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
474 | goto fail; |
475 | ||
476 | service_set_state(s, SERVICE_STOP); | |
477 | } else | |
478 | service_enter_signal(s, SERVICE_STOP_SIGTERM, true); | |
479 | ||
480 | return; | |
481 | ||
482 | fail: | |
87f0e418 | 483 | log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
484 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
485 | } | |
486 | ||
487 | static void service_enter_start_post(Service *s) { | |
488 | int r; | |
489 | assert(s); | |
490 | ||
491 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) { | |
492 | ||
44d8db9e | 493 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
494 | goto fail; |
495 | ||
496 | service_set_state(s, SERVICE_START_POST); | |
497 | } else | |
498 | service_set_state(s, SERVICE_RUNNING); | |
499 | ||
500 | return; | |
501 | ||
502 | fail: | |
87f0e418 | 503 | log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
504 | service_enter_stop(s, false); |
505 | } | |
506 | ||
507 | static void service_enter_start(Service *s) { | |
508 | pid_t pid; | |
509 | int r; | |
510 | ||
511 | assert(s); | |
512 | ||
513 | assert(s->exec_command[SERVICE_EXEC_START]); | |
514 | assert(!s->exec_command[SERVICE_EXEC_START]->command_next); | |
515 | ||
44d8db9e | 516 | if ((r = service_spawn(s, s->exec_command[SERVICE_EXEC_START], s->type == SERVICE_FORKING, true, &pid)) < 0) |
034c6ed7 LP |
517 | goto fail; |
518 | ||
519 | if (s->type == SERVICE_SIMPLE) { | |
520 | /* For simple services we immediately start | |
521 | * the START_POST binaries. */ | |
522 | ||
523 | s->main_pid = pid; | |
524 | s->main_pid_known = true; | |
525 | service_enter_start_post(s); | |
526 | ||
527 | } else if (s->type == SERVICE_FORKING) { | |
528 | ||
529 | /* For forking services we wait until the start | |
530 | * process exited. */ | |
531 | ||
532 | s->control_pid = pid; | |
533 | s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
534 | service_set_state(s, SERVICE_START); | |
535 | } else | |
536 | assert_not_reached("Unknown service type"); | |
537 | ||
538 | return; | |
539 | ||
540 | fail: | |
87f0e418 | 541 | log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
542 | service_enter_stop(s, false); |
543 | } | |
544 | ||
545 | static void service_enter_start_pre(Service *s) { | |
546 | int r; | |
547 | ||
548 | assert(s); | |
549 | ||
550 | if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) { | |
551 | ||
44d8db9e | 552 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
553 | goto fail; |
554 | ||
555 | service_set_state(s, SERVICE_START_PRE); | |
556 | } else | |
557 | service_enter_start(s); | |
558 | ||
559 | return; | |
560 | ||
561 | fail: | |
87f0e418 | 562 | log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
563 | service_enter_dead(s, false, true); |
564 | } | |
565 | ||
566 | static void service_enter_restart(Service *s) { | |
567 | int r; | |
568 | assert(s); | |
569 | ||
87f0e418 | 570 | if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0) |
034c6ed7 LP |
571 | goto fail; |
572 | ||
87f0e418 | 573 | log_debug("%s scheduled restart job.", unit_id(UNIT(s))); |
034c6ed7 LP |
574 | service_enter_dead(s, true, false); |
575 | return; | |
576 | ||
577 | fail: | |
578 | ||
87f0e418 | 579 | log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
580 | service_enter_dead(s, false, false); |
581 | } | |
582 | ||
583 | static void service_enter_reload(Service *s) { | |
584 | int r; | |
585 | ||
586 | assert(s); | |
587 | ||
588 | if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) { | |
589 | ||
44d8db9e | 590 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
591 | goto fail; |
592 | ||
593 | service_set_state(s, SERVICE_RELOAD); | |
594 | } else | |
595 | service_set_state(s, SERVICE_RUNNING); | |
596 | ||
597 | return; | |
598 | ||
599 | fail: | |
87f0e418 | 600 | log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
601 | service_enter_stop(s, false); |
602 | } | |
603 | ||
604 | static void service_run_next(Service *s, bool success) { | |
605 | int r; | |
606 | ||
607 | assert(s); | |
608 | assert(s->control_command); | |
609 | assert(s->control_command->command_next); | |
610 | ||
611 | if (!success) | |
612 | s->failure = true; | |
613 | ||
614 | s->control_command = s->control_command->command_next; | |
615 | ||
44d8db9e | 616 | if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0) |
034c6ed7 LP |
617 | goto fail; |
618 | ||
619 | return; | |
620 | ||
621 | fail: | |
87f0e418 | 622 | log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r)); |
034c6ed7 LP |
623 | |
624 | if (s->state == SERVICE_STOP) | |
625 | service_enter_stop_post(s, false); | |
626 | else if (s->state == SERVICE_STOP_POST) | |
627 | service_enter_dead(s, false, true); | |
628 | else | |
629 | service_enter_stop(s, false); | |
5cb5a6ff LP |
630 | } |
631 | ||
87f0e418 LP |
632 | static int service_start(Unit *u) { |
633 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
634 | |
635 | assert(s); | |
636 | ||
034c6ed7 LP |
637 | /* We cannot fulfill this request right now, try again later |
638 | * please! */ | |
639 | if (s->state == SERVICE_STOP || | |
640 | s->state == SERVICE_STOP_SIGTERM || | |
641 | s->state == SERVICE_STOP_SIGKILL || | |
642 | s->state == SERVICE_STOP_POST || | |
643 | s->state == SERVICE_FINAL_SIGTERM || | |
644 | s->state == SERVICE_FINAL_SIGKILL) | |
5cb5a6ff LP |
645 | return -EAGAIN; |
646 | ||
034c6ed7 LP |
647 | /* Already on it! */ |
648 | if (s->state == SERVICE_START_PRE || | |
649 | s->state == SERVICE_START || | |
650 | s->state == SERVICE_START_POST) | |
651 | return 0; | |
652 | ||
653 | assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART); | |
5cb5a6ff | 654 | |
034c6ed7 LP |
655 | s->failure = false; |
656 | s->main_pid_known = false; | |
657 | ||
658 | service_enter_start_pre(s); | |
659 | return 0; | |
5cb5a6ff LP |
660 | } |
661 | ||
87f0e418 LP |
662 | static int service_stop(Unit *u) { |
663 | Service *s = SERVICE(u); | |
5cb5a6ff LP |
664 | |
665 | assert(s); | |
666 | ||
034c6ed7 LP |
667 | if (s->state == SERVICE_START_PRE || |
668 | s->state == SERVICE_START || | |
669 | s->state == SERVICE_START_POST || | |
670 | s->state == SERVICE_RELOAD) | |
671 | return -EAGAIN; | |
672 | ||
673 | if (s->state == SERVICE_AUTO_RESTART) { | |
674 | service_set_state(s, SERVICE_DEAD); | |
675 | return 0; | |
676 | } | |
677 | ||
678 | assert(s->state == SERVICE_RUNNING); | |
5cb5a6ff | 679 | |
034c6ed7 | 680 | service_enter_stop(s, true); |
5cb5a6ff LP |
681 | return 0; |
682 | } | |
683 | ||
87f0e418 LP |
684 | static int service_reload(Unit *u) { |
685 | Service *s = SERVICE(u); | |
034c6ed7 LP |
686 | |
687 | assert(s); | |
688 | ||
689 | assert(s->state == SERVICE_RUNNING); | |
690 | ||
691 | service_enter_reload(s); | |
5cb5a6ff LP |
692 | return 0; |
693 | } | |
694 | ||
87f0e418 LP |
695 | static bool service_can_reload(Unit *u) { |
696 | Service *s = SERVICE(u); | |
034c6ed7 LP |
697 | |
698 | assert(s); | |
699 | ||
700 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
701 | } | |
702 | ||
87f0e418 LP |
703 | static UnitActiveState service_active_state(Unit *u) { |
704 | assert(u); | |
5cb5a6ff | 705 | |
87f0e418 | 706 | return state_table[SERVICE(u)->state]; |
034c6ed7 LP |
707 | } |
708 | ||
709 | static int main_pid_good(Service *s) { | |
710 | assert(s); | |
711 | ||
712 | /* Returns 0 if the pid is dead, 1 if it is good, -1 if we | |
713 | * don't know */ | |
714 | ||
715 | /* If we know the pid file, then lets just check if it is | |
716 | * still valid */ | |
717 | if (s->main_pid_known) | |
718 | return s->main_pid > 0; | |
719 | ||
720 | /* We don't know the pid */ | |
721 | return -1; | |
722 | } | |
723 | ||
724 | static bool control_pid_good(Service *s) { | |
725 | assert(s); | |
5cb5a6ff | 726 | |
034c6ed7 | 727 | return s->control_pid > 0; |
5cb5a6ff LP |
728 | } |
729 | ||
87f0e418 LP |
730 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
731 | Service *s = SERVICE(u); | |
034c6ed7 | 732 | bool success; |
5cb5a6ff LP |
733 | |
734 | assert(s); | |
034c6ed7 LP |
735 | assert(pid >= 0); |
736 | ||
737 | success = code == CLD_EXITED || status == 0; | |
738 | s->failure = s->failure || !success; | |
739 | ||
740 | if (s->main_pid == pid) { | |
741 | ||
742 | exec_status_fill(&s->main_exec_status, pid, code, status); | |
743 | s->main_pid = 0; | |
744 | ||
745 | if (s->type == SERVICE_SIMPLE) { | |
746 | assert(s->exec_command[SERVICE_EXEC_START]); | |
747 | s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status; | |
748 | } | |
749 | ||
87f0e418 | 750 | log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
751 | |
752 | /* The service exited, so the service is officially | |
753 | * gone. */ | |
754 | ||
755 | switch (s->state) { | |
756 | ||
757 | case SERVICE_START_POST: | |
758 | case SERVICE_RELOAD: | |
759 | case SERVICE_STOP: | |
760 | /* Need to wait until the operation is | |
761 | * done */ | |
762 | break; | |
763 | ||
764 | case SERVICE_RUNNING: | |
765 | service_enter_stop(s, success); | |
766 | break; | |
767 | ||
768 | case SERVICE_STOP_SIGTERM: | |
769 | case SERVICE_STOP_SIGKILL: | |
770 | ||
771 | if (!control_pid_good(s)) | |
772 | service_enter_stop_post(s, success); | |
5cb5a6ff | 773 | |
034c6ed7 LP |
774 | /* If there is still a control process, wait for that first */ |
775 | break; | |
5cb5a6ff | 776 | |
034c6ed7 LP |
777 | default: |
778 | assert_not_reached("Uh, main process died at wrong time."); | |
779 | } | |
5cb5a6ff | 780 | |
034c6ed7 LP |
781 | } else if (s->control_pid == pid) { |
782 | assert(s->control_command); | |
783 | ||
784 | exec_status_fill(&s->control_command->exec_status, pid, code, status); | |
785 | s->control_pid = 0; | |
786 | ||
87f0e418 | 787 | log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status); |
034c6ed7 LP |
788 | |
789 | /* If we are shutting things down anyway we | |
790 | * don't care about failing commands. */ | |
791 | ||
792 | if (s->control_command->command_next && | |
793 | (success || (s->state == SERVICE_EXEC_STOP || s->state == SERVICE_EXEC_STOP_POST))) | |
794 | ||
795 | /* There is another command to * | |
796 | * execute, so let's do that. */ | |
797 | ||
798 | service_run_next(s, success); | |
799 | ||
800 | else { | |
801 | /* No further commands for this step, so let's | |
802 | * figure out what to do next */ | |
803 | ||
804 | switch (s->state) { | |
805 | ||
806 | case SERVICE_START_PRE: | |
807 | if (success) | |
808 | service_enter_start(s); | |
809 | else | |
810 | service_enter_stop(s, false); | |
811 | break; | |
812 | ||
813 | case SERVICE_START: | |
814 | assert(s->type == SERVICE_FORKING); | |
815 | ||
816 | /* Let's try to load the pid | |
817 | * file here if we can. We | |
818 | * ignore the return value, | |
819 | * since the PID file might | |
820 | * actually be created by a | |
821 | * START_POST script */ | |
822 | ||
823 | if (success) { | |
824 | if (s->pid_file) | |
825 | service_load_pid_file(s); | |
826 | ||
827 | service_enter_start_post(s); | |
828 | } else | |
829 | service_enter_stop(s, false); | |
830 | ||
831 | break; | |
832 | ||
833 | case SERVICE_START_POST: | |
834 | if (success && s->pid_file && !s->main_pid_known) { | |
835 | int r; | |
836 | ||
837 | /* Hmm, let's see if we can | |
838 | * load the pid now after the | |
839 | * start-post scripts got | |
840 | * executed. */ | |
841 | ||
842 | if ((r = service_load_pid_file(s)) < 0) | |
87f0e418 | 843 | log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r)); |
034c6ed7 LP |
844 | } |
845 | ||
846 | /* Fall through */ | |
847 | ||
848 | case SERVICE_RELOAD: | |
849 | if (success) { | |
850 | if (main_pid_good(s) != 0) | |
851 | service_set_state(s, SERVICE_RUNNING); | |
852 | else | |
853 | service_enter_stop(s, true); | |
854 | } else | |
855 | service_enter_stop(s, false); | |
856 | ||
857 | break; | |
858 | ||
859 | case SERVICE_STOP: | |
860 | if (main_pid_good(s) > 0) | |
861 | /* Still not dead and we know the PID? Let's go hunting. */ | |
862 | service_enter_signal(s, SERVICE_STOP_SIGTERM, success); | |
863 | else | |
864 | service_enter_stop_post(s, success); | |
865 | break; | |
866 | ||
867 | case SERVICE_STOP_SIGTERM: | |
868 | case SERVICE_STOP_SIGKILL: | |
869 | if (main_pid_good(s) <= 0) | |
870 | service_enter_stop_post(s, success); | |
871 | ||
872 | /* If there is still a service | |
873 | * process around, wait until | |
874 | * that one quit, too */ | |
875 | break; | |
876 | ||
877 | case SERVICE_STOP_POST: | |
878 | case SERVICE_FINAL_SIGTERM: | |
879 | case SERVICE_FINAL_SIGKILL: | |
880 | service_enter_dead(s, success, true); | |
881 | break; | |
882 | ||
883 | default: | |
884 | assert_not_reached("Uh, control process died at wrong time."); | |
885 | } | |
886 | } | |
887 | } else | |
888 | assert_not_reached("Got SIGCHLD for unkown PID"); | |
889 | } | |
890 | ||
87f0e418 LP |
891 | static void service_timer_event(Unit *u, int id, uint64_t elapsed) { |
892 | Service *s = SERVICE(u); | |
034c6ed7 LP |
893 | |
894 | assert(s); | |
895 | assert(elapsed == 1); | |
896 | ||
897 | assert(s->timer_id == id); | |
898 | ||
899 | switch (s->state) { | |
900 | ||
901 | case SERVICE_START_PRE: | |
902 | case SERVICE_START: | |
903 | case SERVICE_START_POST: | |
904 | case SERVICE_RELOAD: | |
87f0e418 | 905 | log_warning("%s operation timed out. Stopping.", unit_id(u)); |
034c6ed7 LP |
906 | service_enter_stop(s, false); |
907 | break; | |
908 | ||
909 | case SERVICE_STOP: | |
87f0e418 | 910 | log_warning("%s stopping timed out. Terminating.", unit_id(u)); |
034c6ed7 LP |
911 | service_enter_signal(s, SERVICE_STOP_SIGTERM, false); |
912 | break; | |
913 | ||
914 | case SERVICE_STOP_SIGTERM: | |
87f0e418 | 915 | log_warning("%s stopping timed out. Killing.", unit_id(u)); |
034c6ed7 LP |
916 | service_enter_signal(s, SERVICE_STOP_SIGKILL, false); |
917 | break; | |
918 | ||
919 | case SERVICE_STOP_SIGKILL: | |
920 | /* Uh, wie sent a SIGKILL and it is still not gone? | |
921 | * Must be something we cannot kill, so let's just be | |
922 | * weirded out and continue */ | |
923 | ||
87f0e418 | 924 | log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u)); |
034c6ed7 LP |
925 | service_enter_stop_post(s, false); |
926 | break; | |
927 | ||
928 | case SERVICE_STOP_POST: | |
87f0e418 | 929 | log_warning("%s stopping timed out (2). Terminating.", unit_id(u)); |
034c6ed7 LP |
930 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, false); |
931 | break; | |
932 | ||
933 | case SERVICE_FINAL_SIGTERM: | |
87f0e418 | 934 | log_warning("%s stopping timed out (2). Killing.", unit_id(u)); |
034c6ed7 LP |
935 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, false); |
936 | break; | |
937 | ||
938 | case SERVICE_FINAL_SIGKILL: | |
87f0e418 | 939 | log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u)); |
034c6ed7 LP |
940 | service_enter_dead(s, false, true); |
941 | break; | |
942 | ||
943 | case SERVICE_AUTO_RESTART: | |
87f0e418 | 944 | log_debug("%s holdoff time over, scheduling restart.", unit_id(u)); |
034c6ed7 LP |
945 | service_enter_restart(s); |
946 | break; | |
947 | ||
948 | default: | |
949 | assert_not_reached("Timeout at wrong time."); | |
950 | } | |
5cb5a6ff LP |
951 | } |
952 | ||
87f0e418 | 953 | const UnitVTable service_vtable = { |
5cb5a6ff LP |
954 | .suffix = ".service", |
955 | ||
034c6ed7 LP |
956 | .init = service_init, |
957 | .done = service_done, | |
958 | ||
5cb5a6ff LP |
959 | .dump = service_dump, |
960 | ||
961 | .start = service_start, | |
962 | .stop = service_stop, | |
963 | .reload = service_reload, | |
964 | ||
034c6ed7 LP |
965 | .can_reload = service_can_reload, |
966 | ||
5cb5a6ff LP |
967 | .active_state = service_active_state, |
968 | ||
034c6ed7 LP |
969 | .sigchld_event = service_sigchld_event, |
970 | .timer_event = service_timer_event, | |
5cb5a6ff | 971 | }; |