]>
Commit | Line | Data |
---|---|---|
1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ | |
2 | ||
3 | #include <errno.h> | |
4 | #include <sys/stat.h> | |
5 | #include <sys/types.h> | |
6 | #include <unistd.h> | |
7 | ||
8 | #include "sd-messages.h" | |
9 | ||
10 | #include "alloc-util.h" | |
11 | #include "async.h" | |
12 | #include "bus-error.h" | |
13 | #include "bus-kernel.h" | |
14 | #include "bus-util.h" | |
15 | #include "dbus-service.h" | |
16 | #include "dbus-unit.h" | |
17 | #include "def.h" | |
18 | #include "env-util.h" | |
19 | #include "escape.h" | |
20 | #include "exit-status.h" | |
21 | #include "fd-util.h" | |
22 | #include "fileio.h" | |
23 | #include "format-util.h" | |
24 | #include "fs-util.h" | |
25 | #include "load-dropin.h" | |
26 | #include "load-fragment.h" | |
27 | #include "log.h" | |
28 | #include "manager.h" | |
29 | #include "parse-util.h" | |
30 | #include "path-util.h" | |
31 | #include "process-util.h" | |
32 | #include "serialize.h" | |
33 | #include "service.h" | |
34 | #include "signal-util.h" | |
35 | #include "special.h" | |
36 | #include "stdio-util.h" | |
37 | #include "string-table.h" | |
38 | #include "string-util.h" | |
39 | #include "strv.h" | |
40 | #include "unit-name.h" | |
41 | #include "unit.h" | |
42 | #include "utf8.h" | |
43 | #include "util.h" | |
44 | ||
45 | static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = { | |
46 | [SERVICE_DEAD] = UNIT_INACTIVE, | |
47 | [SERVICE_CONDITION] = UNIT_ACTIVATING, | |
48 | [SERVICE_START_PRE] = UNIT_ACTIVATING, | |
49 | [SERVICE_START] = UNIT_ACTIVATING, | |
50 | [SERVICE_START_POST] = UNIT_ACTIVATING, | |
51 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
52 | [SERVICE_EXITED] = UNIT_ACTIVE, | |
53 | [SERVICE_RELOAD] = UNIT_RELOADING, | |
54 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
55 | [SERVICE_STOP_WATCHDOG] = UNIT_DEACTIVATING, | |
56 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
57 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
58 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
59 | [SERVICE_FINAL_WATCHDOG] = UNIT_DEACTIVATING, | |
60 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
61 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
62 | [SERVICE_FAILED] = UNIT_FAILED, | |
63 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING, | |
64 | [SERVICE_CLEANING] = UNIT_MAINTENANCE, | |
65 | }; | |
66 | ||
67 | /* For Type=idle we never want to delay any other jobs, hence we | |
68 | * consider idle jobs active as soon as we start working on them */ | |
69 | static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = { | |
70 | [SERVICE_DEAD] = UNIT_INACTIVE, | |
71 | [SERVICE_CONDITION] = UNIT_ACTIVE, | |
72 | [SERVICE_START_PRE] = UNIT_ACTIVE, | |
73 | [SERVICE_START] = UNIT_ACTIVE, | |
74 | [SERVICE_START_POST] = UNIT_ACTIVE, | |
75 | [SERVICE_RUNNING] = UNIT_ACTIVE, | |
76 | [SERVICE_EXITED] = UNIT_ACTIVE, | |
77 | [SERVICE_RELOAD] = UNIT_RELOADING, | |
78 | [SERVICE_STOP] = UNIT_DEACTIVATING, | |
79 | [SERVICE_STOP_WATCHDOG] = UNIT_DEACTIVATING, | |
80 | [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING, | |
81 | [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING, | |
82 | [SERVICE_STOP_POST] = UNIT_DEACTIVATING, | |
83 | [SERVICE_FINAL_WATCHDOG] = UNIT_DEACTIVATING, | |
84 | [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING, | |
85 | [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING, | |
86 | [SERVICE_FAILED] = UNIT_FAILED, | |
87 | [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING, | |
88 | [SERVICE_CLEANING] = UNIT_MAINTENANCE, | |
89 | }; | |
90 | ||
91 | static int service_dispatch_inotify_io(sd_event_source *source, int fd, uint32_t events, void *userdata); | |
92 | static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); | |
93 | static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata); | |
94 | static int service_dispatch_exec_io(sd_event_source *source, int fd, uint32_t events, void *userdata); | |
95 | ||
96 | static void service_enter_signal(Service *s, ServiceState state, ServiceResult f); | |
97 | static void service_enter_reload_by_notify(Service *s); | |
98 | ||
99 | static void service_init(Unit *u) { | |
100 | Service *s = SERVICE(u); | |
101 | ||
102 | assert(u); | |
103 | assert(u->load_state == UNIT_STUB); | |
104 | ||
105 | s->timeout_start_usec = u->manager->default_timeout_start_usec; | |
106 | s->timeout_stop_usec = u->manager->default_timeout_stop_usec; | |
107 | s->timeout_abort_usec = u->manager->default_timeout_abort_usec; | |
108 | s->timeout_abort_set = u->manager->default_timeout_abort_set; | |
109 | s->restart_usec = u->manager->default_restart_usec; | |
110 | s->runtime_max_usec = USEC_INFINITY; | |
111 | s->type = _SERVICE_TYPE_INVALID; | |
112 | s->socket_fd = -1; | |
113 | s->stdin_fd = s->stdout_fd = s->stderr_fd = -1; | |
114 | s->guess_main_pid = true; | |
115 | ||
116 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
117 | ||
118 | s->exec_context.keyring_mode = MANAGER_IS_SYSTEM(u->manager) ? | |
119 | EXEC_KEYRING_PRIVATE : EXEC_KEYRING_INHERIT; | |
120 | ||
121 | s->watchdog_original_usec = USEC_INFINITY; | |
122 | ||
123 | s->oom_policy = _OOM_POLICY_INVALID; | |
124 | } | |
125 | ||
126 | static void service_unwatch_control_pid(Service *s) { | |
127 | assert(s); | |
128 | ||
129 | if (s->control_pid <= 0) | |
130 | return; | |
131 | ||
132 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
133 | s->control_pid = 0; | |
134 | } | |
135 | ||
136 | static void service_unwatch_main_pid(Service *s) { | |
137 | assert(s); | |
138 | ||
139 | if (s->main_pid <= 0) | |
140 | return; | |
141 | ||
142 | unit_unwatch_pid(UNIT(s), s->main_pid); | |
143 | s->main_pid = 0; | |
144 | } | |
145 | ||
146 | static void service_unwatch_pid_file(Service *s) { | |
147 | if (!s->pid_file_pathspec) | |
148 | return; | |
149 | ||
150 | log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path); | |
151 | path_spec_unwatch(s->pid_file_pathspec); | |
152 | path_spec_done(s->pid_file_pathspec); | |
153 | s->pid_file_pathspec = mfree(s->pid_file_pathspec); | |
154 | } | |
155 | ||
156 | static int service_set_main_pid(Service *s, pid_t pid) { | |
157 | assert(s); | |
158 | ||
159 | if (pid <= 1) | |
160 | return -EINVAL; | |
161 | ||
162 | if (pid == getpid_cached()) | |
163 | return -EINVAL; | |
164 | ||
165 | if (s->main_pid == pid && s->main_pid_known) | |
166 | return 0; | |
167 | ||
168 | if (s->main_pid != pid) { | |
169 | service_unwatch_main_pid(s); | |
170 | exec_status_start(&s->main_exec_status, pid); | |
171 | } | |
172 | ||
173 | s->main_pid = pid; | |
174 | s->main_pid_known = true; | |
175 | s->main_pid_alien = pid_is_my_child(pid) == 0; | |
176 | ||
177 | if (s->main_pid_alien) | |
178 | log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | void service_close_socket_fd(Service *s) { | |
184 | assert(s); | |
185 | ||
186 | /* Undo the effect of service_set_socket_fd(). */ | |
187 | ||
188 | s->socket_fd = asynchronous_close(s->socket_fd); | |
189 | ||
190 | if (UNIT_ISSET(s->accept_socket)) { | |
191 | socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket))); | |
192 | unit_ref_unset(&s->accept_socket); | |
193 | } | |
194 | } | |
195 | ||
196 | static void service_stop_watchdog(Service *s) { | |
197 | assert(s); | |
198 | ||
199 | s->watchdog_event_source = sd_event_source_disable_unref(s->watchdog_event_source); | |
200 | s->watchdog_timestamp = DUAL_TIMESTAMP_NULL; | |
201 | } | |
202 | ||
203 | static void service_start_watchdog(Service *s) { | |
204 | usec_t watchdog_usec; | |
205 | int r; | |
206 | ||
207 | assert(s); | |
208 | ||
209 | watchdog_usec = service_get_watchdog_usec(s); | |
210 | if (IN_SET(watchdog_usec, 0, USEC_INFINITY)) { | |
211 | service_stop_watchdog(s); | |
212 | return; | |
213 | } | |
214 | ||
215 | if (s->watchdog_event_source) { | |
216 | r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, watchdog_usec)); | |
217 | if (r < 0) { | |
218 | log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m"); | |
219 | return; | |
220 | } | |
221 | ||
222 | r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT); | |
223 | } else { | |
224 | r = sd_event_add_time( | |
225 | UNIT(s)->manager->event, | |
226 | &s->watchdog_event_source, | |
227 | CLOCK_MONOTONIC, | |
228 | usec_add(s->watchdog_timestamp.monotonic, watchdog_usec), 0, | |
229 | service_dispatch_watchdog, s); | |
230 | if (r < 0) { | |
231 | log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m"); | |
232 | return; | |
233 | } | |
234 | ||
235 | (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog"); | |
236 | ||
237 | /* Let's process everything else which might be a sign | |
238 | * of living before we consider a service died. */ | |
239 | r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE); | |
240 | } | |
241 | if (r < 0) | |
242 | log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m"); | |
243 | } | |
244 | ||
245 | static void service_extend_event_source_timeout(Service *s, sd_event_source *source, usec_t extended) { | |
246 | usec_t current; | |
247 | int r; | |
248 | ||
249 | assert(s); | |
250 | ||
251 | /* Extends the specified event source timer to at least the specified time, unless it is already later | |
252 | * anyway. */ | |
253 | ||
254 | if (!source) | |
255 | return; | |
256 | ||
257 | r = sd_event_source_get_time(source, ¤t); | |
258 | if (r < 0) { | |
259 | const char *desc; | |
260 | (void) sd_event_source_get_description(s->timer_event_source, &desc); | |
261 | log_unit_warning_errno(UNIT(s), r, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc)); | |
262 | return; | |
263 | } | |
264 | ||
265 | if (current >= extended) /* Current timeout is already longer, ignore this. */ | |
266 | return; | |
267 | ||
268 | r = sd_event_source_set_time(source, extended); | |
269 | if (r < 0) { | |
270 | const char *desc; | |
271 | (void) sd_event_source_get_description(s->timer_event_source, &desc); | |
272 | log_unit_warning_errno(UNIT(s), r, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc)); | |
273 | } | |
274 | } | |
275 | ||
276 | static void service_extend_timeout(Service *s, usec_t extend_timeout_usec) { | |
277 | usec_t extended; | |
278 | ||
279 | assert(s); | |
280 | ||
281 | if (IN_SET(extend_timeout_usec, 0, USEC_INFINITY)) | |
282 | return; | |
283 | ||
284 | extended = usec_add(now(CLOCK_MONOTONIC), extend_timeout_usec); | |
285 | ||
286 | service_extend_event_source_timeout(s, s->timer_event_source, extended); | |
287 | service_extend_event_source_timeout(s, s->watchdog_event_source, extended); | |
288 | } | |
289 | ||
290 | static void service_reset_watchdog(Service *s) { | |
291 | assert(s); | |
292 | ||
293 | dual_timestamp_get(&s->watchdog_timestamp); | |
294 | service_start_watchdog(s); | |
295 | } | |
296 | ||
297 | static void service_override_watchdog_timeout(Service *s, usec_t watchdog_override_usec) { | |
298 | assert(s); | |
299 | ||
300 | s->watchdog_override_enable = true; | |
301 | s->watchdog_override_usec = watchdog_override_usec; | |
302 | service_reset_watchdog(s); | |
303 | ||
304 | log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec); | |
305 | log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec); | |
306 | } | |
307 | ||
308 | static void service_fd_store_unlink(ServiceFDStore *fs) { | |
309 | ||
310 | if (!fs) | |
311 | return; | |
312 | ||
313 | if (fs->service) { | |
314 | assert(fs->service->n_fd_store > 0); | |
315 | LIST_REMOVE(fd_store, fs->service->fd_store, fs); | |
316 | fs->service->n_fd_store--; | |
317 | } | |
318 | ||
319 | sd_event_source_disable_unref(fs->event_source); | |
320 | ||
321 | free(fs->fdname); | |
322 | safe_close(fs->fd); | |
323 | free(fs); | |
324 | } | |
325 | ||
326 | static void service_release_fd_store(Service *s) { | |
327 | assert(s); | |
328 | ||
329 | if (s->n_keep_fd_store > 0) | |
330 | return; | |
331 | ||
332 | log_unit_debug(UNIT(s), "Releasing all stored fds"); | |
333 | while (s->fd_store) | |
334 | service_fd_store_unlink(s->fd_store); | |
335 | ||
336 | assert(s->n_fd_store == 0); | |
337 | } | |
338 | ||
339 | static void service_release_resources(Unit *u) { | |
340 | Service *s = SERVICE(u); | |
341 | ||
342 | assert(s); | |
343 | ||
344 | if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0) | |
345 | return; | |
346 | ||
347 | log_unit_debug(u, "Releasing resources."); | |
348 | ||
349 | s->stdin_fd = safe_close(s->stdin_fd); | |
350 | s->stdout_fd = safe_close(s->stdout_fd); | |
351 | s->stderr_fd = safe_close(s->stderr_fd); | |
352 | ||
353 | service_release_fd_store(s); | |
354 | } | |
355 | ||
356 | static void service_done(Unit *u) { | |
357 | Service *s = SERVICE(u); | |
358 | ||
359 | assert(s); | |
360 | ||
361 | s->pid_file = mfree(s->pid_file); | |
362 | s->status_text = mfree(s->status_text); | |
363 | ||
364 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, false); | |
365 | exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX); | |
366 | s->control_command = NULL; | |
367 | s->main_command = NULL; | |
368 | ||
369 | dynamic_creds_unref(&s->dynamic_creds); | |
370 | ||
371 | exit_status_set_free(&s->restart_prevent_status); | |
372 | exit_status_set_free(&s->restart_force_status); | |
373 | exit_status_set_free(&s->success_status); | |
374 | ||
375 | /* This will leak a process, but at least no memory or any of | |
376 | * our resources */ | |
377 | service_unwatch_main_pid(s); | |
378 | service_unwatch_control_pid(s); | |
379 | service_unwatch_pid_file(s); | |
380 | ||
381 | if (s->bus_name) { | |
382 | unit_unwatch_bus_name(u, s->bus_name); | |
383 | s->bus_name = mfree(s->bus_name); | |
384 | } | |
385 | ||
386 | s->bus_name_owner = mfree(s->bus_name_owner); | |
387 | ||
388 | s->usb_function_descriptors = mfree(s->usb_function_descriptors); | |
389 | s->usb_function_strings = mfree(s->usb_function_strings); | |
390 | ||
391 | service_close_socket_fd(s); | |
392 | s->peer = socket_peer_unref(s->peer); | |
393 | ||
394 | unit_ref_unset(&s->accept_socket); | |
395 | ||
396 | service_stop_watchdog(s); | |
397 | ||
398 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
399 | s->exec_fd_event_source = sd_event_source_disable_unref(s->exec_fd_event_source); | |
400 | ||
401 | service_release_resources(u); | |
402 | } | |
403 | ||
404 | static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) { | |
405 | ServiceFDStore *fs = userdata; | |
406 | ||
407 | assert(e); | |
408 | assert(fs); | |
409 | ||
410 | /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */ | |
411 | log_unit_debug(UNIT(fs->service), | |
412 | "Received %s on stored fd %d (%s), closing.", | |
413 | revents & EPOLLERR ? "EPOLLERR" : "EPOLLHUP", | |
414 | fs->fd, strna(fs->fdname)); | |
415 | service_fd_store_unlink(fs); | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static int service_add_fd_store(Service *s, int fd, const char *name, bool do_poll) { | |
420 | ServiceFDStore *fs; | |
421 | int r; | |
422 | ||
423 | /* fd is always consumed if we return >= 0 */ | |
424 | ||
425 | assert(s); | |
426 | assert(fd >= 0); | |
427 | ||
428 | if (s->n_fd_store >= s->n_fd_store_max) | |
429 | return -EXFULL; /* Our store is full. | |
430 | * Use this errno rather than E[NM]FILE to distinguish from | |
431 | * the case where systemd itself hits the file limit. */ | |
432 | ||
433 | LIST_FOREACH(fd_store, fs, s->fd_store) { | |
434 | r = same_fd(fs->fd, fd); | |
435 | if (r < 0) | |
436 | return r; | |
437 | if (r > 0) { | |
438 | safe_close(fd); | |
439 | return 0; /* fd already included */ | |
440 | } | |
441 | } | |
442 | ||
443 | fs = new(ServiceFDStore, 1); | |
444 | if (!fs) | |
445 | return -ENOMEM; | |
446 | ||
447 | *fs = (ServiceFDStore) { | |
448 | .fd = fd, | |
449 | .service = s, | |
450 | .do_poll = do_poll, | |
451 | .fdname = strdup(name ?: "stored"), | |
452 | }; | |
453 | ||
454 | if (!fs->fdname) { | |
455 | free(fs); | |
456 | return -ENOMEM; | |
457 | } | |
458 | ||
459 | if (do_poll) { | |
460 | r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs); | |
461 | if (r < 0 && r != -EPERM) { /* EPERM indicates fds that aren't pollable, which is OK */ | |
462 | free(fs->fdname); | |
463 | free(fs); | |
464 | return r; | |
465 | } else if (r >= 0) | |
466 | (void) sd_event_source_set_description(fs->event_source, "service-fd-store"); | |
467 | } | |
468 | ||
469 | LIST_PREPEND(fd_store, s->fd_store, fs); | |
470 | s->n_fd_store++; | |
471 | ||
472 | return 1; /* fd newly stored */ | |
473 | } | |
474 | ||
475 | static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name, bool do_poll) { | |
476 | int r; | |
477 | ||
478 | assert(s); | |
479 | ||
480 | while (fdset_size(fds) > 0) { | |
481 | _cleanup_close_ int fd = -1; | |
482 | ||
483 | fd = fdset_steal_first(fds); | |
484 | if (fd < 0) | |
485 | break; | |
486 | ||
487 | r = service_add_fd_store(s, fd, name, do_poll); | |
488 | if (r == -EXFULL) | |
489 | return log_unit_warning_errno(UNIT(s), r, | |
490 | "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.", | |
491 | s->n_fd_store_max); | |
492 | if (r < 0) | |
493 | return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m"); | |
494 | if (r > 0) | |
495 | log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name)); | |
496 | fd = -1; | |
497 | } | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
502 | static void service_remove_fd_store(Service *s, const char *name) { | |
503 | ServiceFDStore *fs, *n; | |
504 | ||
505 | assert(s); | |
506 | assert(name); | |
507 | ||
508 | LIST_FOREACH_SAFE(fd_store, fs, n, s->fd_store) { | |
509 | if (!streq(fs->fdname, name)) | |
510 | continue; | |
511 | ||
512 | log_unit_debug(UNIT(s), "Got explicit request to remove fd %i (%s), closing.", fs->fd, name); | |
513 | service_fd_store_unlink(fs); | |
514 | } | |
515 | } | |
516 | ||
517 | static int service_arm_timer(Service *s, usec_t usec) { | |
518 | int r; | |
519 | ||
520 | assert(s); | |
521 | ||
522 | if (s->timer_event_source) { | |
523 | r = sd_event_source_set_time(s->timer_event_source, usec); | |
524 | if (r < 0) | |
525 | return r; | |
526 | ||
527 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
528 | } | |
529 | ||
530 | if (usec == USEC_INFINITY) | |
531 | return 0; | |
532 | ||
533 | r = sd_event_add_time( | |
534 | UNIT(s)->manager->event, | |
535 | &s->timer_event_source, | |
536 | CLOCK_MONOTONIC, | |
537 | usec, 0, | |
538 | service_dispatch_timer, s); | |
539 | if (r < 0) | |
540 | return r; | |
541 | ||
542 | (void) sd_event_source_set_description(s->timer_event_source, "service-timer"); | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | static int service_verify(Service *s) { | |
548 | assert(s); | |
549 | assert(UNIT(s)->load_state == UNIT_LOADED); | |
550 | ||
551 | if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP] && | |
552 | UNIT(s)->success_action == EMERGENCY_ACTION_NONE) | |
553 | /* FailureAction= only makes sense if one of the start or stop commands is specified. | |
554 | * SuccessAction= will be executed unconditionally if no commands are specified. Hence, | |
555 | * either a command or SuccessAction= are required. */ | |
556 | ||
557 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing."); | |
558 | ||
559 | if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) | |
560 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing."); | |
561 | ||
562 | if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START] && UNIT(s)->success_action == EMERGENCY_ACTION_NONE) | |
563 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing."); | |
564 | ||
565 | if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) | |
566 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing."); | |
567 | ||
568 | if (s->type == SERVICE_ONESHOT && | |
569 | !IN_SET(s->restart, SERVICE_RESTART_NO, SERVICE_RESTART_ON_FAILURE, SERVICE_RESTART_ON_ABNORMAL, SERVICE_RESTART_ON_WATCHDOG, SERVICE_RESTART_ON_ABORT)) | |
570 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has Restart= set to either always or on-success, which isn't allowed for Type=oneshot services. Refusing."); | |
571 | ||
572 | if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) | |
573 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing."); | |
574 | ||
575 | if (s->type == SERVICE_DBUS && !s->bus_name) | |
576 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing."); | |
577 | ||
578 | if (s->exec_context.pam_name && !IN_SET(s->kill_context.kill_mode, KILL_CONTROL_GROUP, KILL_MIXED)) | |
579 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENOEXEC), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing."); | |
580 | ||
581 | if (s->usb_function_descriptors && !s->usb_function_strings) | |
582 | log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring."); | |
583 | ||
584 | if (!s->usb_function_descriptors && s->usb_function_strings) | |
585 | log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring."); | |
586 | ||
587 | if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT) | |
588 | log_unit_warning(UNIT(s), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring."); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static int service_add_default_dependencies(Service *s) { | |
594 | int r; | |
595 | ||
596 | assert(s); | |
597 | ||
598 | if (!UNIT(s)->default_dependencies) | |
599 | return 0; | |
600 | ||
601 | /* Add a number of automatic dependencies useful for the | |
602 | * majority of services. */ | |
603 | ||
604 | if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) { | |
605 | /* First, pull in the really early boot stuff, and | |
606 | * require it, so that we fail if we can't acquire | |
607 | * it. */ | |
608 | ||
609 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
610 | if (r < 0) | |
611 | return r; | |
612 | } else { | |
613 | ||
614 | /* In the --user instance there's no sysinit.target, | |
615 | * in that case require basic.target instead. */ | |
616 | ||
617 | r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
618 | if (r < 0) | |
619 | return r; | |
620 | } | |
621 | ||
622 | /* Second, if the rest of the base system is in the same | |
623 | * transaction, order us after it, but do not pull it in or | |
624 | * even require it. */ | |
625 | r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
626 | if (r < 0) | |
627 | return r; | |
628 | ||
629 | /* Third, add us in for normal shutdown. */ | |
630 | return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, true, UNIT_DEPENDENCY_DEFAULT); | |
631 | } | |
632 | ||
633 | static void service_fix_stdio(Service *s) { | |
634 | assert(s); | |
635 | ||
636 | /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the | |
637 | * default value that is subject to automatic overriding triggered by other settings and an explicit | |
638 | * choice the user can make. We don't distinguish between these cases currently. */ | |
639 | ||
640 | if (s->exec_context.std_input == EXEC_INPUT_NULL && | |
641 | s->exec_context.stdin_data_size > 0) | |
642 | s->exec_context.std_input = EXEC_INPUT_DATA; | |
643 | ||
644 | if (IN_SET(s->exec_context.std_input, | |
645 | EXEC_INPUT_TTY, | |
646 | EXEC_INPUT_TTY_FORCE, | |
647 | EXEC_INPUT_TTY_FAIL, | |
648 | EXEC_INPUT_SOCKET, | |
649 | EXEC_INPUT_NAMED_FD)) | |
650 | return; | |
651 | ||
652 | /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from | |
653 | * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense, | |
654 | * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be | |
655 | * duplicated for both input and output at the same time (since they then would cause a feedback | |
656 | * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */ | |
657 | ||
658 | if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT && | |
659 | s->exec_context.std_output == EXEC_OUTPUT_INHERIT) | |
660 | s->exec_context.std_error = UNIT(s)->manager->default_std_error; | |
661 | ||
662 | if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT) | |
663 | s->exec_context.std_output = UNIT(s)->manager->default_std_output; | |
664 | } | |
665 | ||
666 | static int service_setup_bus_name(Service *s) { | |
667 | int r; | |
668 | ||
669 | assert(s); | |
670 | ||
671 | /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */ | |
672 | if (s->type != SERVICE_DBUS || !s->bus_name) | |
673 | return 0; | |
674 | ||
675 | r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
676 | if (r < 0) | |
677 | return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m"); | |
678 | ||
679 | /* We always want to be ordered against dbus.socket if both are in the transaction. */ | |
680 | r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, true, UNIT_DEPENDENCY_FILE); | |
681 | if (r < 0) | |
682 | return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m"); | |
683 | ||
684 | r = unit_watch_bus_name(UNIT(s), s->bus_name); | |
685 | if (r == -EEXIST) | |
686 | return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name); | |
687 | if (r < 0) | |
688 | return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name); | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
693 | static int service_add_extras(Service *s) { | |
694 | int r; | |
695 | ||
696 | assert(s); | |
697 | ||
698 | if (s->type == _SERVICE_TYPE_INVALID) { | |
699 | /* Figure out a type automatically */ | |
700 | if (s->bus_name) | |
701 | s->type = SERVICE_DBUS; | |
702 | else if (s->exec_command[SERVICE_EXEC_START]) | |
703 | s->type = SERVICE_SIMPLE; | |
704 | else | |
705 | s->type = SERVICE_ONESHOT; | |
706 | } | |
707 | ||
708 | /* Oneshot services have disabled start timeout by default */ | |
709 | if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined) | |
710 | s->timeout_start_usec = USEC_INFINITY; | |
711 | ||
712 | service_fix_stdio(s); | |
713 | ||
714 | r = unit_patch_contexts(UNIT(s)); | |
715 | if (r < 0) | |
716 | return r; | |
717 | ||
718 | r = unit_add_exec_dependencies(UNIT(s), &s->exec_context); | |
719 | if (r < 0) | |
720 | return r; | |
721 | ||
722 | r = unit_set_default_slice(UNIT(s)); | |
723 | if (r < 0) | |
724 | return r; | |
725 | ||
726 | /* If the service needs the notify socket, let's enable it automatically. */ | |
727 | if (s->notify_access == NOTIFY_NONE && | |
728 | (s->type == SERVICE_NOTIFY || s->watchdog_usec > 0 || s->n_fd_store_max > 0)) | |
729 | s->notify_access = NOTIFY_MAIN; | |
730 | ||
731 | /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when | |
732 | * delegation is on, in that case it we assume the payload knows better what to do and can process | |
733 | * things in a more focused way. */ | |
734 | if (s->oom_policy < 0) | |
735 | s->oom_policy = s->cgroup_context.delegate ? OOM_CONTINUE : UNIT(s)->manager->default_oom_policy; | |
736 | ||
737 | /* Let the kernel do the killing if that's requested. */ | |
738 | s->cgroup_context.memory_oom_group = s->oom_policy == OOM_KILL; | |
739 | ||
740 | r = service_add_default_dependencies(s); | |
741 | if (r < 0) | |
742 | return r; | |
743 | ||
744 | r = service_setup_bus_name(s); | |
745 | if (r < 0) | |
746 | return r; | |
747 | ||
748 | return 0; | |
749 | } | |
750 | ||
751 | static int service_load(Unit *u) { | |
752 | Service *s = SERVICE(u); | |
753 | int r; | |
754 | ||
755 | r = unit_load_fragment_and_dropin(u, true); | |
756 | if (r < 0) | |
757 | return r; | |
758 | ||
759 | if (u->load_state != UNIT_LOADED) | |
760 | return 0; | |
761 | ||
762 | /* This is a new unit? Then let's add in some extras */ | |
763 | r = service_add_extras(s); | |
764 | if (r < 0) | |
765 | return r; | |
766 | ||
767 | return service_verify(s); | |
768 | } | |
769 | ||
770 | static void service_dump(Unit *u, FILE *f, const char *prefix) { | |
771 | ServiceExecCommand c; | |
772 | Service *s = SERVICE(u); | |
773 | const char *prefix2; | |
774 | ||
775 | assert(s); | |
776 | ||
777 | prefix = strempty(prefix); | |
778 | prefix2 = strjoina(prefix, "\t"); | |
779 | ||
780 | fprintf(f, | |
781 | "%sService State: %s\n" | |
782 | "%sResult: %s\n" | |
783 | "%sReload Result: %s\n" | |
784 | "%sClean Result: %s\n" | |
785 | "%sPermissionsStartOnly: %s\n" | |
786 | "%sRootDirectoryStartOnly: %s\n" | |
787 | "%sRemainAfterExit: %s\n" | |
788 | "%sGuessMainPID: %s\n" | |
789 | "%sType: %s\n" | |
790 | "%sRestart: %s\n" | |
791 | "%sNotifyAccess: %s\n" | |
792 | "%sNotifyState: %s\n" | |
793 | "%sOOMPolicy: %s\n", | |
794 | prefix, service_state_to_string(s->state), | |
795 | prefix, service_result_to_string(s->result), | |
796 | prefix, service_result_to_string(s->reload_result), | |
797 | prefix, service_result_to_string(s->clean_result), | |
798 | prefix, yes_no(s->permissions_start_only), | |
799 | prefix, yes_no(s->root_directory_start_only), | |
800 | prefix, yes_no(s->remain_after_exit), | |
801 | prefix, yes_no(s->guess_main_pid), | |
802 | prefix, service_type_to_string(s->type), | |
803 | prefix, service_restart_to_string(s->restart), | |
804 | prefix, notify_access_to_string(s->notify_access), | |
805 | prefix, notify_state_to_string(s->notify_state), | |
806 | prefix, oom_policy_to_string(s->oom_policy)); | |
807 | ||
808 | if (s->control_pid > 0) | |
809 | fprintf(f, | |
810 | "%sControl PID: "PID_FMT"\n", | |
811 | prefix, s->control_pid); | |
812 | ||
813 | if (s->main_pid > 0) | |
814 | fprintf(f, | |
815 | "%sMain PID: "PID_FMT"\n" | |
816 | "%sMain PID Known: %s\n" | |
817 | "%sMain PID Alien: %s\n", | |
818 | prefix, s->main_pid, | |
819 | prefix, yes_no(s->main_pid_known), | |
820 | prefix, yes_no(s->main_pid_alien)); | |
821 | ||
822 | if (s->pid_file) | |
823 | fprintf(f, | |
824 | "%sPIDFile: %s\n", | |
825 | prefix, s->pid_file); | |
826 | ||
827 | if (s->bus_name) | |
828 | fprintf(f, | |
829 | "%sBusName: %s\n" | |
830 | "%sBus Name Good: %s\n", | |
831 | prefix, s->bus_name, | |
832 | prefix, yes_no(s->bus_name_good)); | |
833 | ||
834 | if (UNIT_ISSET(s->accept_socket)) | |
835 | fprintf(f, | |
836 | "%sAccept Socket: %s\n", | |
837 | prefix, UNIT_DEREF(s->accept_socket)->id); | |
838 | ||
839 | fprintf(f, | |
840 | "%sRestartSec: %s\n" | |
841 | "%sTimeoutStartSec: %s\n" | |
842 | "%sTimeoutStopSec: %s\n" | |
843 | "%sTimeoutStartFailureMode: %s\n" | |
844 | "%sTimeoutStopFailureMode: %s\n", | |
845 | prefix, FORMAT_TIMESPAN(s->restart_usec, USEC_PER_SEC), | |
846 | prefix, FORMAT_TIMESPAN(s->timeout_start_usec, USEC_PER_SEC), | |
847 | prefix, FORMAT_TIMESPAN(s->timeout_stop_usec, USEC_PER_SEC), | |
848 | prefix, service_timeout_failure_mode_to_string(s->timeout_start_failure_mode), | |
849 | prefix, service_timeout_failure_mode_to_string(s->timeout_stop_failure_mode)); | |
850 | ||
851 | if (s->timeout_abort_set) | |
852 | fprintf(f, | |
853 | "%sTimeoutAbortSec: %s\n", | |
854 | prefix, FORMAT_TIMESPAN(s->timeout_abort_usec, USEC_PER_SEC)); | |
855 | ||
856 | fprintf(f, | |
857 | "%sRuntimeMaxSec: %s\n" | |
858 | "%sWatchdogSec: %s\n", | |
859 | prefix, FORMAT_TIMESPAN(s->runtime_max_usec, USEC_PER_SEC), | |
860 | prefix, FORMAT_TIMESPAN(s->watchdog_usec, USEC_PER_SEC)); | |
861 | ||
862 | kill_context_dump(&s->kill_context, f, prefix); | |
863 | exec_context_dump(&s->exec_context, f, prefix); | |
864 | ||
865 | for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) { | |
866 | ||
867 | if (!s->exec_command[c]) | |
868 | continue; | |
869 | ||
870 | fprintf(f, "%s-> %s:\n", | |
871 | prefix, service_exec_command_to_string(c)); | |
872 | ||
873 | exec_command_dump_list(s->exec_command[c], f, prefix2); | |
874 | } | |
875 | ||
876 | if (s->status_text) | |
877 | fprintf(f, "%sStatus Text: %s\n", | |
878 | prefix, s->status_text); | |
879 | ||
880 | if (s->n_fd_store_max > 0) | |
881 | fprintf(f, | |
882 | "%sFile Descriptor Store Max: %u\n" | |
883 | "%sFile Descriptor Store Current: %zu\n", | |
884 | prefix, s->n_fd_store_max, | |
885 | prefix, s->n_fd_store); | |
886 | ||
887 | cgroup_context_dump(UNIT(s), f, prefix); | |
888 | } | |
889 | ||
890 | static int service_is_suitable_main_pid(Service *s, pid_t pid, int prio) { | |
891 | Unit *owner; | |
892 | ||
893 | assert(s); | |
894 | assert(pid_is_valid(pid)); | |
895 | ||
896 | /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the | |
897 | * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is | |
898 | * good */ | |
899 | ||
900 | if (pid == getpid_cached() || pid == 1) | |
901 | return log_unit_full_errno(UNIT(s), prio, SYNTHETIC_ERRNO(EPERM), "New main PID "PID_FMT" is the manager, refusing.", pid); | |
902 | ||
903 | if (pid == s->control_pid) | |
904 | return log_unit_full_errno(UNIT(s), prio, SYNTHETIC_ERRNO(EPERM), "New main PID "PID_FMT" is the control process, refusing.", pid); | |
905 | ||
906 | if (!pid_is_alive(pid)) | |
907 | return log_unit_full_errno(UNIT(s), prio, SYNTHETIC_ERRNO(ESRCH), "New main PID "PID_FMT" does not exist or is a zombie.", pid); | |
908 | ||
909 | owner = manager_get_unit_by_pid(UNIT(s)->manager, pid); | |
910 | if (owner == UNIT(s)) { | |
911 | log_unit_debug(UNIT(s), "New main PID "PID_FMT" belongs to service, we are happy.", pid); | |
912 | return 1; /* Yay, it's definitely a good PID */ | |
913 | } | |
914 | ||
915 | return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */ | |
916 | } | |
917 | ||
918 | static int service_load_pid_file(Service *s, bool may_warn) { | |
919 | char procfs[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)]; | |
920 | bool questionable_pid_file = false; | |
921 | _cleanup_free_ char *k = NULL; | |
922 | _cleanup_close_ int fd = -1; | |
923 | int r, prio; | |
924 | pid_t pid; | |
925 | ||
926 | assert(s); | |
927 | ||
928 | if (!s->pid_file) | |
929 | return -ENOENT; | |
930 | ||
931 | prio = may_warn ? LOG_INFO : LOG_DEBUG; | |
932 | ||
933 | r = chase_symlinks(s->pid_file, NULL, CHASE_SAFE, NULL, &fd); | |
934 | if (r == -ENOLINK) { | |
935 | log_unit_debug_errno(UNIT(s), r, | |
936 | "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s->pid_file); | |
937 | ||
938 | questionable_pid_file = true; | |
939 | ||
940 | r = chase_symlinks(s->pid_file, NULL, 0, NULL, &fd); | |
941 | } | |
942 | if (r < 0) | |
943 | return log_unit_full_errno(UNIT(s), prio, fd, | |
944 | "Can't open PID file %s (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state)); | |
945 | ||
946 | /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd | |
947 | * chase_symlinks() returned us into a proper fd first. */ | |
948 | xsprintf(procfs, "/proc/self/fd/%i", fd); | |
949 | r = read_one_line_file(procfs, &k); | |
950 | if (r < 0) | |
951 | return log_unit_error_errno(UNIT(s), r, | |
952 | "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m", | |
953 | s->pid_file); | |
954 | ||
955 | r = parse_pid(k, &pid); | |
956 | if (r < 0) | |
957 | return log_unit_full_errno(UNIT(s), prio, r, "Failed to parse PID from file %s: %m", s->pid_file); | |
958 | ||
959 | if (s->main_pid_known && pid == s->main_pid) | |
960 | return 0; | |
961 | ||
962 | r = service_is_suitable_main_pid(s, pid, prio); | |
963 | if (r < 0) | |
964 | return r; | |
965 | if (r == 0) { | |
966 | struct stat st; | |
967 | ||
968 | if (questionable_pid_file) | |
969 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(EPERM), | |
970 | "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s->pid_file); | |
971 | ||
972 | /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */ | |
973 | ||
974 | if (fstat(fd, &st) < 0) | |
975 | return log_unit_error_errno(UNIT(s), errno, "Failed to fstat() PID file O_PATH fd: %m"); | |
976 | ||
977 | if (st.st_uid != 0) | |
978 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(EPERM), | |
979 | "New main PID "PID_FMT" does not belong to service, and PID file is not owned by root. Refusing.", pid); | |
980 | ||
981 | log_unit_debug(UNIT(s), "New main PID "PID_FMT" does not belong to service, but we'll accept it since PID file is owned by root.", pid); | |
982 | } | |
983 | ||
984 | if (s->main_pid_known) { | |
985 | log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid); | |
986 | ||
987 | service_unwatch_main_pid(s); | |
988 | s->main_pid_known = false; | |
989 | } else | |
990 | log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid); | |
991 | ||
992 | r = service_set_main_pid(s, pid); | |
993 | if (r < 0) | |
994 | return r; | |
995 | ||
996 | r = unit_watch_pid(UNIT(s), pid, false); | |
997 | if (r < 0) /* FIXME: we need to do something here */ | |
998 | return log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid); | |
999 | ||
1000 | return 1; | |
1001 | } | |
1002 | ||
1003 | static void service_search_main_pid(Service *s) { | |
1004 | pid_t pid = 0; | |
1005 | int r; | |
1006 | ||
1007 | assert(s); | |
1008 | ||
1009 | /* If we know it anyway, don't ever fall back to unreliable | |
1010 | * heuristics */ | |
1011 | if (s->main_pid_known) | |
1012 | return; | |
1013 | ||
1014 | if (!s->guess_main_pid) | |
1015 | return; | |
1016 | ||
1017 | assert(s->main_pid <= 0); | |
1018 | ||
1019 | if (unit_search_main_pid(UNIT(s), &pid) < 0) | |
1020 | return; | |
1021 | ||
1022 | log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid); | |
1023 | if (service_set_main_pid(s, pid) < 0) | |
1024 | return; | |
1025 | ||
1026 | r = unit_watch_pid(UNIT(s), pid, false); | |
1027 | if (r < 0) | |
1028 | /* FIXME: we need to do something here */ | |
1029 | log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid); | |
1030 | } | |
1031 | ||
1032 | static void service_set_state(Service *s, ServiceState state) { | |
1033 | ServiceState old_state; | |
1034 | const UnitActiveState *table; | |
1035 | ||
1036 | assert(s); | |
1037 | ||
1038 | if (s->state != state) | |
1039 | bus_unit_send_pending_change_signal(UNIT(s), false); | |
1040 | ||
1041 | table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table; | |
1042 | ||
1043 | old_state = s->state; | |
1044 | s->state = state; | |
1045 | ||
1046 | service_unwatch_pid_file(s); | |
1047 | ||
1048 | if (!IN_SET(state, | |
1049 | SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
1050 | SERVICE_RUNNING, | |
1051 | SERVICE_RELOAD, | |
1052 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1053 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
1054 | SERVICE_AUTO_RESTART, | |
1055 | SERVICE_CLEANING)) | |
1056 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
1057 | ||
1058 | if (!IN_SET(state, | |
1059 | SERVICE_START, SERVICE_START_POST, | |
1060 | SERVICE_RUNNING, SERVICE_RELOAD, | |
1061 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1062 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) { | |
1063 | service_unwatch_main_pid(s); | |
1064 | s->main_command = NULL; | |
1065 | } | |
1066 | ||
1067 | if (!IN_SET(state, | |
1068 | SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
1069 | SERVICE_RELOAD, | |
1070 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1071 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
1072 | SERVICE_CLEANING)) { | |
1073 | service_unwatch_control_pid(s); | |
1074 | s->control_command = NULL; | |
1075 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
1076 | } | |
1077 | ||
1078 | if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) { | |
1079 | unit_unwatch_all_pids(UNIT(s)); | |
1080 | unit_dequeue_rewatch_pids(UNIT(s)); | |
1081 | } | |
1082 | ||
1083 | if (!IN_SET(state, | |
1084 | SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
1085 | SERVICE_RUNNING, SERVICE_RELOAD, | |
1086 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1087 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) && | |
1088 | !(state == SERVICE_DEAD && UNIT(s)->job)) | |
1089 | service_close_socket_fd(s); | |
1090 | ||
1091 | if (state != SERVICE_START) | |
1092 | s->exec_fd_event_source = sd_event_source_disable_unref(s->exec_fd_event_source); | |
1093 | ||
1094 | if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) | |
1095 | service_stop_watchdog(s); | |
1096 | ||
1097 | /* For the inactive states unit_notify() will trim the cgroup, | |
1098 | * but for exit we have to do that ourselves... */ | |
1099 | if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager)) | |
1100 | unit_prune_cgroup(UNIT(s)); | |
1101 | ||
1102 | if (old_state != state) | |
1103 | log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state)); | |
1104 | ||
1105 | unit_notify(UNIT(s), table[old_state], table[state], | |
1106 | (s->reload_result == SERVICE_SUCCESS ? 0 : UNIT_NOTIFY_RELOAD_FAILURE) | | |
1107 | (s->will_auto_restart ? UNIT_NOTIFY_WILL_AUTO_RESTART : 0)); | |
1108 | } | |
1109 | ||
1110 | static usec_t service_coldplug_timeout(Service *s) { | |
1111 | assert(s); | |
1112 | ||
1113 | switch (s->deserialized_state) { | |
1114 | ||
1115 | case SERVICE_CONDITION: | |
1116 | case SERVICE_START_PRE: | |
1117 | case SERVICE_START: | |
1118 | case SERVICE_START_POST: | |
1119 | case SERVICE_RELOAD: | |
1120 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec); | |
1121 | ||
1122 | case SERVICE_RUNNING: | |
1123 | return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec); | |
1124 | ||
1125 | case SERVICE_STOP: | |
1126 | case SERVICE_STOP_SIGTERM: | |
1127 | case SERVICE_STOP_SIGKILL: | |
1128 | case SERVICE_STOP_POST: | |
1129 | case SERVICE_FINAL_SIGTERM: | |
1130 | case SERVICE_FINAL_SIGKILL: | |
1131 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec); | |
1132 | ||
1133 | case SERVICE_STOP_WATCHDOG: | |
1134 | case SERVICE_FINAL_WATCHDOG: | |
1135 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, service_timeout_abort_usec(s)); | |
1136 | ||
1137 | case SERVICE_AUTO_RESTART: | |
1138 | return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec); | |
1139 | ||
1140 | case SERVICE_CLEANING: | |
1141 | return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->exec_context.timeout_clean_usec); | |
1142 | ||
1143 | default: | |
1144 | return USEC_INFINITY; | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | static int service_coldplug(Unit *u) { | |
1149 | Service *s = SERVICE(u); | |
1150 | int r; | |
1151 | ||
1152 | assert(s); | |
1153 | assert(s->state == SERVICE_DEAD); | |
1154 | ||
1155 | if (s->deserialized_state == s->state) | |
1156 | return 0; | |
1157 | ||
1158 | r = service_arm_timer(s, service_coldplug_timeout(s)); | |
1159 | if (r < 0) | |
1160 | return r; | |
1161 | ||
1162 | if (s->main_pid > 0 && | |
1163 | pid_is_unwaited(s->main_pid) && | |
1164 | (IN_SET(s->deserialized_state, | |
1165 | SERVICE_START, SERVICE_START_POST, | |
1166 | SERVICE_RUNNING, SERVICE_RELOAD, | |
1167 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1168 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) { | |
1169 | r = unit_watch_pid(UNIT(s), s->main_pid, false); | |
1170 | if (r < 0) | |
1171 | return r; | |
1172 | } | |
1173 | ||
1174 | if (s->control_pid > 0 && | |
1175 | pid_is_unwaited(s->control_pid) && | |
1176 | IN_SET(s->deserialized_state, | |
1177 | SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, | |
1178 | SERVICE_RELOAD, | |
1179 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
1180 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, | |
1181 | SERVICE_CLEANING)) { | |
1182 | r = unit_watch_pid(UNIT(s), s->control_pid, false); | |
1183 | if (r < 0) | |
1184 | return r; | |
1185 | } | |
1186 | ||
1187 | if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART, SERVICE_CLEANING)) { | |
1188 | (void) unit_enqueue_rewatch_pids(u); | |
1189 | (void) unit_setup_dynamic_creds(u); | |
1190 | (void) unit_setup_exec_runtime(u); | |
1191 | } | |
1192 | ||
1193 | if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) | |
1194 | service_start_watchdog(s); | |
1195 | ||
1196 | if (UNIT_ISSET(s->accept_socket)) { | |
1197 | Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket)); | |
1198 | ||
1199 | if (socket->max_connections_per_source > 0) { | |
1200 | SocketPeer *peer; | |
1201 | ||
1202 | /* Make a best-effort attempt at bumping the connection count */ | |
1203 | if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) { | |
1204 | socket_peer_unref(s->peer); | |
1205 | s->peer = peer; | |
1206 | } | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | service_set_state(s, s->deserialized_state); | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static int service_collect_fds( | |
1215 | Service *s, | |
1216 | int **fds, | |
1217 | char ***fd_names, | |
1218 | size_t *n_socket_fds, | |
1219 | size_t *n_storage_fds) { | |
1220 | ||
1221 | _cleanup_strv_free_ char **rfd_names = NULL; | |
1222 | _cleanup_free_ int *rfds = NULL; | |
1223 | size_t rn_socket_fds = 0, rn_storage_fds = 0; | |
1224 | int r; | |
1225 | ||
1226 | assert(s); | |
1227 | assert(fds); | |
1228 | assert(fd_names); | |
1229 | assert(n_socket_fds); | |
1230 | assert(n_storage_fds); | |
1231 | ||
1232 | if (s->socket_fd >= 0) { | |
1233 | ||
1234 | /* Pass the per-connection socket */ | |
1235 | ||
1236 | rfds = new(int, 1); | |
1237 | if (!rfds) | |
1238 | return -ENOMEM; | |
1239 | rfds[0] = s->socket_fd; | |
1240 | ||
1241 | rfd_names = strv_new("connection"); | |
1242 | if (!rfd_names) | |
1243 | return -ENOMEM; | |
1244 | ||
1245 | rn_socket_fds = 1; | |
1246 | } else { | |
1247 | Unit *u; | |
1248 | ||
1249 | /* Pass all our configured sockets for singleton services */ | |
1250 | ||
1251 | UNIT_FOREACH_DEPENDENCY(u, UNIT(s), UNIT_ATOM_TRIGGERED_BY) { | |
1252 | _cleanup_free_ int *cfds = NULL; | |
1253 | Socket *sock; | |
1254 | int cn_fds; | |
1255 | ||
1256 | if (u->type != UNIT_SOCKET) | |
1257 | continue; | |
1258 | ||
1259 | sock = SOCKET(u); | |
1260 | ||
1261 | cn_fds = socket_collect_fds(sock, &cfds); | |
1262 | if (cn_fds < 0) | |
1263 | return cn_fds; | |
1264 | ||
1265 | if (cn_fds <= 0) | |
1266 | continue; | |
1267 | ||
1268 | if (!rfds) { | |
1269 | rfds = TAKE_PTR(cfds); | |
1270 | rn_socket_fds = cn_fds; | |
1271 | } else { | |
1272 | int *t; | |
1273 | ||
1274 | t = reallocarray(rfds, rn_socket_fds + cn_fds, sizeof(int)); | |
1275 | if (!t) | |
1276 | return -ENOMEM; | |
1277 | ||
1278 | memcpy(t + rn_socket_fds, cfds, cn_fds * sizeof(int)); | |
1279 | ||
1280 | rfds = t; | |
1281 | rn_socket_fds += cn_fds; | |
1282 | } | |
1283 | ||
1284 | r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds); | |
1285 | if (r < 0) | |
1286 | return r; | |
1287 | } | |
1288 | } | |
1289 | ||
1290 | if (s->n_fd_store > 0) { | |
1291 | ServiceFDStore *fs; | |
1292 | size_t n_fds; | |
1293 | char **nl; | |
1294 | int *t; | |
1295 | ||
1296 | t = reallocarray(rfds, rn_socket_fds + s->n_fd_store, sizeof(int)); | |
1297 | if (!t) | |
1298 | return -ENOMEM; | |
1299 | ||
1300 | rfds = t; | |
1301 | ||
1302 | nl = reallocarray(rfd_names, rn_socket_fds + s->n_fd_store + 1, sizeof(char *)); | |
1303 | if (!nl) | |
1304 | return -ENOMEM; | |
1305 | ||
1306 | rfd_names = nl; | |
1307 | n_fds = rn_socket_fds; | |
1308 | ||
1309 | LIST_FOREACH(fd_store, fs, s->fd_store) { | |
1310 | rfds[n_fds] = fs->fd; | |
1311 | rfd_names[n_fds] = strdup(strempty(fs->fdname)); | |
1312 | if (!rfd_names[n_fds]) | |
1313 | return -ENOMEM; | |
1314 | ||
1315 | rn_storage_fds++; | |
1316 | n_fds++; | |
1317 | } | |
1318 | ||
1319 | rfd_names[n_fds] = NULL; | |
1320 | } | |
1321 | ||
1322 | *fds = TAKE_PTR(rfds); | |
1323 | *fd_names = TAKE_PTR(rfd_names); | |
1324 | *n_socket_fds = rn_socket_fds; | |
1325 | *n_storage_fds = rn_storage_fds; | |
1326 | ||
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | static int service_allocate_exec_fd_event_source( | |
1331 | Service *s, | |
1332 | int fd, | |
1333 | sd_event_source **ret_event_source) { | |
1334 | ||
1335 | _cleanup_(sd_event_source_unrefp) sd_event_source *source = NULL; | |
1336 | int r; | |
1337 | ||
1338 | assert(s); | |
1339 | assert(fd >= 0); | |
1340 | assert(ret_event_source); | |
1341 | ||
1342 | r = sd_event_add_io(UNIT(s)->manager->event, &source, fd, 0, service_dispatch_exec_io, s); | |
1343 | if (r < 0) | |
1344 | return log_unit_error_errno(UNIT(s), r, "Failed to allocate exec_fd event source: %m"); | |
1345 | ||
1346 | /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */ | |
1347 | ||
1348 | r = sd_event_source_set_priority(source, SD_EVENT_PRIORITY_NORMAL-3); | |
1349 | if (r < 0) | |
1350 | return log_unit_error_errno(UNIT(s), r, "Failed to adjust priority of exec_fd event source: %m"); | |
1351 | ||
1352 | (void) sd_event_source_set_description(source, "service exec_fd"); | |
1353 | ||
1354 | r = sd_event_source_set_io_fd_own(source, true); | |
1355 | if (r < 0) | |
1356 | return log_unit_error_errno(UNIT(s), r, "Failed to pass ownership of fd to event source: %m"); | |
1357 | ||
1358 | *ret_event_source = TAKE_PTR(source); | |
1359 | return 0; | |
1360 | } | |
1361 | ||
1362 | static int service_allocate_exec_fd( | |
1363 | Service *s, | |
1364 | sd_event_source **ret_event_source, | |
1365 | int *ret_exec_fd) { | |
1366 | ||
1367 | _cleanup_close_pair_ int p[] = { -1, -1 }; | |
1368 | int r; | |
1369 | ||
1370 | assert(s); | |
1371 | assert(ret_event_source); | |
1372 | assert(ret_exec_fd); | |
1373 | ||
1374 | if (pipe2(p, O_CLOEXEC|O_NONBLOCK) < 0) | |
1375 | return log_unit_error_errno(UNIT(s), errno, "Failed to allocate exec_fd pipe: %m"); | |
1376 | ||
1377 | r = service_allocate_exec_fd_event_source(s, p[0], ret_event_source); | |
1378 | if (r < 0) | |
1379 | return r; | |
1380 | ||
1381 | TAKE_FD(p[0]); | |
1382 | *ret_exec_fd = TAKE_FD(p[1]); | |
1383 | ||
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | static bool service_exec_needs_notify_socket(Service *s, ExecFlags flags) { | |
1388 | assert(s); | |
1389 | ||
1390 | /* Notifications are accepted depending on the process and | |
1391 | * the access setting of the service: | |
1392 | * process: \ access: NONE MAIN EXEC ALL | |
1393 | * main no yes yes yes | |
1394 | * control no no yes yes | |
1395 | * other (forked) no no no yes */ | |
1396 | ||
1397 | if (flags & EXEC_IS_CONTROL) | |
1398 | /* A control process */ | |
1399 | return IN_SET(s->notify_access, NOTIFY_EXEC, NOTIFY_ALL); | |
1400 | ||
1401 | /* We only spawn main processes and control processes, so any | |
1402 | * process that is not a control process is a main process */ | |
1403 | return s->notify_access != NOTIFY_NONE; | |
1404 | } | |
1405 | ||
1406 | static int service_spawn( | |
1407 | Service *s, | |
1408 | ExecCommand *c, | |
1409 | usec_t timeout, | |
1410 | ExecFlags flags, | |
1411 | pid_t *ret_pid) { | |
1412 | ||
1413 | _cleanup_(exec_params_clear) ExecParameters exec_params = { | |
1414 | .flags = flags, | |
1415 | .stdin_fd = -1, | |
1416 | .stdout_fd = -1, | |
1417 | .stderr_fd = -1, | |
1418 | .exec_fd = -1, | |
1419 | }; | |
1420 | _cleanup_(sd_event_source_unrefp) sd_event_source *exec_fd_source = NULL; | |
1421 | _cleanup_strv_free_ char **final_env = NULL, **our_env = NULL; | |
1422 | size_t n_env = 0; | |
1423 | pid_t pid; | |
1424 | int r; | |
1425 | ||
1426 | assert(s); | |
1427 | assert(c); | |
1428 | assert(ret_pid); | |
1429 | ||
1430 | r = unit_prepare_exec(UNIT(s)); /* This realizes the cgroup, among other things */ | |
1431 | if (r < 0) | |
1432 | return r; | |
1433 | ||
1434 | assert(!s->exec_fd_event_source); | |
1435 | ||
1436 | if (flags & EXEC_IS_CONTROL) { | |
1437 | /* If this is a control process, mask the permissions/chroot application if this is requested. */ | |
1438 | if (s->permissions_start_only) | |
1439 | exec_params.flags &= ~EXEC_APPLY_SANDBOXING; | |
1440 | if (s->root_directory_start_only) | |
1441 | exec_params.flags &= ~EXEC_APPLY_CHROOT; | |
1442 | } | |
1443 | ||
1444 | if ((flags & EXEC_PASS_FDS) || | |
1445 | s->exec_context.std_input == EXEC_INPUT_SOCKET || | |
1446 | s->exec_context.std_output == EXEC_OUTPUT_SOCKET || | |
1447 | s->exec_context.std_error == EXEC_OUTPUT_SOCKET) { | |
1448 | ||
1449 | r = service_collect_fds(s, | |
1450 | &exec_params.fds, | |
1451 | &exec_params.fd_names, | |
1452 | &exec_params.n_socket_fds, | |
1453 | &exec_params.n_storage_fds); | |
1454 | if (r < 0) | |
1455 | return r; | |
1456 | ||
1457 | log_unit_debug(UNIT(s), "Passing %zu fds to service", exec_params.n_socket_fds + exec_params.n_storage_fds); | |
1458 | } | |
1459 | ||
1460 | if (!FLAGS_SET(flags, EXEC_IS_CONTROL) && s->type == SERVICE_EXEC) { | |
1461 | r = service_allocate_exec_fd(s, &exec_fd_source, &exec_params.exec_fd); | |
1462 | if (r < 0) | |
1463 | return r; | |
1464 | } | |
1465 | ||
1466 | r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout)); | |
1467 | if (r < 0) | |
1468 | return r; | |
1469 | ||
1470 | our_env = new0(char*, 10); | |
1471 | if (!our_env) | |
1472 | return -ENOMEM; | |
1473 | ||
1474 | if (service_exec_needs_notify_socket(s, flags)) { | |
1475 | if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) | |
1476 | return -ENOMEM; | |
1477 | ||
1478 | exec_params.notify_socket = UNIT(s)->manager->notify_socket; | |
1479 | } | |
1480 | ||
1481 | if (s->main_pid > 0) | |
1482 | if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) | |
1483 | return -ENOMEM; | |
1484 | ||
1485 | if (MANAGER_IS_USER(UNIT(s)->manager)) | |
1486 | if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid_cached()) < 0) | |
1487 | return -ENOMEM; | |
1488 | ||
1489 | if (s->pid_file) | |
1490 | if (asprintf(our_env + n_env++, "PIDFILE=%s", s->pid_file) < 0) | |
1491 | return -ENOMEM; | |
1492 | ||
1493 | if (s->socket_fd >= 0) { | |
1494 | union sockaddr_union sa; | |
1495 | socklen_t salen = sizeof(sa); | |
1496 | ||
1497 | /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something | |
1498 | * useful. Note that we do this only when we are still connected at this point in time, which we might | |
1499 | * very well not be. Hence we ignore all errors when retrieving peer information (as that might result | |
1500 | * in ENOTCONN), and just use whate we can use. */ | |
1501 | ||
1502 | if (getpeername(s->socket_fd, &sa.sa, &salen) >= 0 && | |
1503 | IN_SET(sa.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) { | |
1504 | _cleanup_free_ char *addr = NULL; | |
1505 | char *t; | |
1506 | unsigned port; | |
1507 | ||
1508 | r = sockaddr_pretty(&sa.sa, salen, true, false, &addr); | |
1509 | if (r < 0) | |
1510 | return r; | |
1511 | ||
1512 | t = strjoin("REMOTE_ADDR=", addr); | |
1513 | if (!t) | |
1514 | return -ENOMEM; | |
1515 | our_env[n_env++] = t; | |
1516 | ||
1517 | r = sockaddr_port(&sa.sa, &port); | |
1518 | if (r < 0) | |
1519 | return r; | |
1520 | ||
1521 | if (asprintf(&t, "REMOTE_PORT=%u", port) < 0) | |
1522 | return -ENOMEM; | |
1523 | our_env[n_env++] = t; | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | if (flags & EXEC_SETENV_RESULT) { | |
1528 | if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0) | |
1529 | return -ENOMEM; | |
1530 | ||
1531 | if (s->main_exec_status.pid > 0 && | |
1532 | dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) { | |
1533 | if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0) | |
1534 | return -ENOMEM; | |
1535 | ||
1536 | if (s->main_exec_status.code == CLD_EXITED) | |
1537 | r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status); | |
1538 | else | |
1539 | r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status)); | |
1540 | if (r < 0) | |
1541 | return -ENOMEM; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | r = unit_set_exec_params(UNIT(s), &exec_params); | |
1546 | if (r < 0) | |
1547 | return r; | |
1548 | ||
1549 | final_env = strv_env_merge(2, exec_params.environment, our_env, NULL); | |
1550 | if (!final_env) | |
1551 | return -ENOMEM; | |
1552 | ||
1553 | /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */ | |
1554 | SET_FLAG(exec_params.flags, EXEC_NSS_BYPASS_BUS, | |
1555 | MANAGER_IS_SYSTEM(UNIT(s)->manager) && unit_has_name(UNIT(s), SPECIAL_DBUS_SERVICE)); | |
1556 | ||
1557 | strv_free_and_replace(exec_params.environment, final_env); | |
1558 | exec_params.watchdog_usec = service_get_watchdog_usec(s); | |
1559 | exec_params.selinux_context_net = s->socket_fd_selinux_context_net; | |
1560 | if (s->type == SERVICE_IDLE) | |
1561 | exec_params.idle_pipe = UNIT(s)->manager->idle_pipe; | |
1562 | exec_params.stdin_fd = s->stdin_fd; | |
1563 | exec_params.stdout_fd = s->stdout_fd; | |
1564 | exec_params.stderr_fd = s->stderr_fd; | |
1565 | ||
1566 | r = exec_spawn(UNIT(s), | |
1567 | c, | |
1568 | &s->exec_context, | |
1569 | &exec_params, | |
1570 | s->exec_runtime, | |
1571 | &s->dynamic_creds, | |
1572 | &pid); | |
1573 | if (r < 0) | |
1574 | return r; | |
1575 | ||
1576 | s->exec_fd_event_source = TAKE_PTR(exec_fd_source); | |
1577 | s->exec_fd_hot = false; | |
1578 | ||
1579 | r = unit_watch_pid(UNIT(s), pid, true); | |
1580 | if (r < 0) | |
1581 | return r; | |
1582 | ||
1583 | *ret_pid = pid; | |
1584 | ||
1585 | return 0; | |
1586 | } | |
1587 | ||
1588 | static int main_pid_good(Service *s) { | |
1589 | assert(s); | |
1590 | ||
1591 | /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */ | |
1592 | ||
1593 | /* If we know the pid file, then let's just check if it is | |
1594 | * still valid */ | |
1595 | if (s->main_pid_known) { | |
1596 | ||
1597 | /* If it's an alien child let's check if it is still | |
1598 | * alive ... */ | |
1599 | if (s->main_pid_alien && s->main_pid > 0) | |
1600 | return pid_is_alive(s->main_pid); | |
1601 | ||
1602 | /* .. otherwise assume we'll get a SIGCHLD for it, | |
1603 | * which we really should wait for to collect exit | |
1604 | * status and code */ | |
1605 | return s->main_pid > 0; | |
1606 | } | |
1607 | ||
1608 | /* We don't know the pid */ | |
1609 | return -EAGAIN; | |
1610 | } | |
1611 | ||
1612 | static int control_pid_good(Service *s) { | |
1613 | assert(s); | |
1614 | ||
1615 | /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to | |
1616 | * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also | |
1617 | * means: we can't figure it out. */ | |
1618 | ||
1619 | return s->control_pid > 0; | |
1620 | } | |
1621 | ||
1622 | static int cgroup_good(Service *s) { | |
1623 | int r; | |
1624 | ||
1625 | assert(s); | |
1626 | ||
1627 | /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't | |
1628 | * figure it out */ | |
1629 | ||
1630 | if (!UNIT(s)->cgroup_path) | |
1631 | return 0; | |
1632 | ||
1633 | r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path); | |
1634 | if (r < 0) | |
1635 | return r; | |
1636 | ||
1637 | return r == 0; | |
1638 | } | |
1639 | ||
1640 | static bool service_shall_restart(Service *s, const char **reason) { | |
1641 | assert(s); | |
1642 | ||
1643 | /* Don't restart after manual stops */ | |
1644 | if (s->forbid_restart) { | |
1645 | *reason = "manual stop"; | |
1646 | return false; | |
1647 | } | |
1648 | ||
1649 | /* Never restart if this is configured as special exception */ | |
1650 | if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status)) { | |
1651 | *reason = "prevented by exit status"; | |
1652 | return false; | |
1653 | } | |
1654 | ||
1655 | /* Restart if the exit code/status are configured as restart triggers */ | |
1656 | if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status)) { | |
1657 | *reason = "forced by exit status"; | |
1658 | return true; | |
1659 | } | |
1660 | ||
1661 | *reason = "restart setting"; | |
1662 | switch (s->restart) { | |
1663 | ||
1664 | case SERVICE_RESTART_NO: | |
1665 | return false; | |
1666 | ||
1667 | case SERVICE_RESTART_ALWAYS: | |
1668 | return true; | |
1669 | ||
1670 | case SERVICE_RESTART_ON_SUCCESS: | |
1671 | return s->result == SERVICE_SUCCESS; | |
1672 | ||
1673 | case SERVICE_RESTART_ON_FAILURE: | |
1674 | return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_SKIP_CONDITION); | |
1675 | ||
1676 | case SERVICE_RESTART_ON_ABNORMAL: | |
1677 | return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE, SERVICE_SKIP_CONDITION); | |
1678 | ||
1679 | case SERVICE_RESTART_ON_WATCHDOG: | |
1680 | return s->result == SERVICE_FAILURE_WATCHDOG; | |
1681 | ||
1682 | case SERVICE_RESTART_ON_ABORT: | |
1683 | return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP); | |
1684 | ||
1685 | default: | |
1686 | assert_not_reached("unknown restart setting"); | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | static bool service_will_restart(Unit *u) { | |
1691 | Service *s = SERVICE(u); | |
1692 | ||
1693 | assert(s); | |
1694 | ||
1695 | if (s->will_auto_restart) | |
1696 | return true; | |
1697 | if (s->state == SERVICE_AUTO_RESTART) | |
1698 | return true; | |
1699 | ||
1700 | return unit_will_restart_default(u); | |
1701 | } | |
1702 | ||
1703 | static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) { | |
1704 | ServiceState end_state; | |
1705 | int r; | |
1706 | ||
1707 | assert(s); | |
1708 | ||
1709 | /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not | |
1710 | * undo what has already been enqueued. */ | |
1711 | if (unit_stop_pending(UNIT(s))) | |
1712 | allow_restart = false; | |
1713 | ||
1714 | if (s->result == SERVICE_SUCCESS) | |
1715 | s->result = f; | |
1716 | ||
1717 | if (s->result == SERVICE_SUCCESS) { | |
1718 | unit_log_success(UNIT(s)); | |
1719 | end_state = SERVICE_DEAD; | |
1720 | } else if (s->result == SERVICE_SKIP_CONDITION) { | |
1721 | unit_log_skip(UNIT(s), service_result_to_string(s->result)); | |
1722 | end_state = SERVICE_DEAD; | |
1723 | } else { | |
1724 | unit_log_failure(UNIT(s), service_result_to_string(s->result)); | |
1725 | end_state = SERVICE_FAILED; | |
1726 | } | |
1727 | unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_stop); | |
1728 | ||
1729 | if (!allow_restart) | |
1730 | log_unit_debug(UNIT(s), "Service restart not allowed."); | |
1731 | else { | |
1732 | const char *reason; | |
1733 | bool shall_restart; | |
1734 | ||
1735 | shall_restart = service_shall_restart(s, &reason); | |
1736 | log_unit_debug(UNIT(s), "Service will %srestart (%s)", | |
1737 | shall_restart ? "" : "not ", | |
1738 | reason); | |
1739 | if (shall_restart) | |
1740 | s->will_auto_restart = true; | |
1741 | } | |
1742 | ||
1743 | /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through | |
1744 | * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */ | |
1745 | s->n_keep_fd_store ++; | |
1746 | ||
1747 | service_set_state(s, end_state); | |
1748 | ||
1749 | if (s->will_auto_restart) { | |
1750 | s->will_auto_restart = false; | |
1751 | ||
1752 | r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec)); | |
1753 | if (r < 0) { | |
1754 | s->n_keep_fd_store--; | |
1755 | goto fail; | |
1756 | } | |
1757 | ||
1758 | service_set_state(s, SERVICE_AUTO_RESTART); | |
1759 | } else | |
1760 | /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the | |
1761 | * user can still introspect the counter. Do so on the next start. */ | |
1762 | s->flush_n_restarts = true; | |
1763 | ||
1764 | /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC | |
1765 | * queue, so that the fd store is possibly gc'ed again */ | |
1766 | s->n_keep_fd_store--; | |
1767 | unit_add_to_gc_queue(UNIT(s)); | |
1768 | ||
1769 | /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */ | |
1770 | s->forbid_restart = false; | |
1771 | ||
1772 | /* We want fresh tmpdirs in case service is started again immediately */ | |
1773 | s->exec_runtime = exec_runtime_unref(s->exec_runtime, true); | |
1774 | ||
1775 | /* Also, remove the runtime directory */ | |
1776 | unit_destroy_runtime_data(UNIT(s), &s->exec_context); | |
1777 | ||
1778 | /* Get rid of the IPC bits of the user */ | |
1779 | unit_unref_uid_gid(UNIT(s), true); | |
1780 | ||
1781 | /* Release the user, and destroy it if we are the only remaining owner */ | |
1782 | dynamic_creds_destroy(&s->dynamic_creds); | |
1783 | ||
1784 | /* Try to delete the pid file. At this point it will be | |
1785 | * out-of-date, and some software might be confused by it, so | |
1786 | * let's remove it. */ | |
1787 | if (s->pid_file) | |
1788 | (void) unlink(s->pid_file); | |
1789 | ||
1790 | /* Reset TTY ownership if necessary */ | |
1791 | exec_context_revert_tty(&s->exec_context); | |
1792 | ||
1793 | return; | |
1794 | ||
1795 | fail: | |
1796 | log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m"); | |
1797 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false); | |
1798 | } | |
1799 | ||
1800 | static void service_enter_stop_post(Service *s, ServiceResult f) { | |
1801 | int r; | |
1802 | assert(s); | |
1803 | ||
1804 | if (s->result == SERVICE_SUCCESS) | |
1805 | s->result = f; | |
1806 | ||
1807 | service_unwatch_control_pid(s); | |
1808 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
1809 | ||
1810 | s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]; | |
1811 | if (s->control_command) { | |
1812 | s->control_command_id = SERVICE_EXEC_STOP_POST; | |
1813 | ||
1814 | r = service_spawn(s, | |
1815 | s->control_command, | |
1816 | s->timeout_stop_usec, | |
1817 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT|EXEC_CONTROL_CGROUP, | |
1818 | &s->control_pid); | |
1819 | if (r < 0) | |
1820 | goto fail; | |
1821 | ||
1822 | service_set_state(s, SERVICE_STOP_POST); | |
1823 | } else | |
1824 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS); | |
1825 | ||
1826 | return; | |
1827 | ||
1828 | fail: | |
1829 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m"); | |
1830 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1831 | } | |
1832 | ||
1833 | static int state_to_kill_operation(Service *s, ServiceState state) { | |
1834 | switch (state) { | |
1835 | ||
1836 | case SERVICE_STOP_WATCHDOG: | |
1837 | case SERVICE_FINAL_WATCHDOG: | |
1838 | return KILL_WATCHDOG; | |
1839 | ||
1840 | case SERVICE_STOP_SIGTERM: | |
1841 | if (unit_has_job_type(UNIT(s), JOB_RESTART)) | |
1842 | return KILL_RESTART; | |
1843 | _fallthrough_; | |
1844 | ||
1845 | case SERVICE_FINAL_SIGTERM: | |
1846 | return KILL_TERMINATE; | |
1847 | ||
1848 | case SERVICE_STOP_SIGKILL: | |
1849 | case SERVICE_FINAL_SIGKILL: | |
1850 | return KILL_KILL; | |
1851 | ||
1852 | default: | |
1853 | return _KILL_OPERATION_INVALID; | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) { | |
1858 | int kill_operation, r; | |
1859 | ||
1860 | assert(s); | |
1861 | ||
1862 | if (s->result == SERVICE_SUCCESS) | |
1863 | s->result = f; | |
1864 | ||
1865 | /* Before sending any signal, make sure we track all members of this cgroup */ | |
1866 | (void) unit_watch_all_pids(UNIT(s)); | |
1867 | ||
1868 | /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have | |
1869 | * died now */ | |
1870 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
1871 | ||
1872 | kill_operation = state_to_kill_operation(s, state); | |
1873 | r = unit_kill_context( | |
1874 | UNIT(s), | |
1875 | &s->kill_context, | |
1876 | kill_operation, | |
1877 | s->main_pid, | |
1878 | s->control_pid, | |
1879 | s->main_pid_alien); | |
1880 | if (r < 0) | |
1881 | goto fail; | |
1882 | ||
1883 | if (r > 0) { | |
1884 | r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), | |
1885 | kill_operation == KILL_WATCHDOG ? service_timeout_abort_usec(s) : s->timeout_stop_usec)); | |
1886 | if (r < 0) | |
1887 | goto fail; | |
1888 | ||
1889 | service_set_state(s, state); | |
1890 | } else if (IN_SET(state, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill) | |
1891 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS); | |
1892 | else if (IN_SET(state, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL)) | |
1893 | service_enter_stop_post(s, SERVICE_SUCCESS); | |
1894 | else if (IN_SET(state, SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM) && s->kill_context.send_sigkill) | |
1895 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS); | |
1896 | else | |
1897 | service_enter_dead(s, SERVICE_SUCCESS, true); | |
1898 | ||
1899 | return; | |
1900 | ||
1901 | fail: | |
1902 | log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m"); | |
1903 | ||
1904 | if (IN_SET(state, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL)) | |
1905 | service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES); | |
1906 | else | |
1907 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
1908 | } | |
1909 | ||
1910 | static void service_enter_stop_by_notify(Service *s) { | |
1911 | assert(s); | |
1912 | ||
1913 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
1914 | ||
1915 | service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec)); | |
1916 | ||
1917 | /* The service told us it's stopping, so it's as if we SIGTERM'd it. */ | |
1918 | service_set_state(s, SERVICE_STOP_SIGTERM); | |
1919 | } | |
1920 | ||
1921 | static void service_enter_stop(Service *s, ServiceResult f) { | |
1922 | int r; | |
1923 | ||
1924 | assert(s); | |
1925 | ||
1926 | if (s->result == SERVICE_SUCCESS) | |
1927 | s->result = f; | |
1928 | ||
1929 | service_unwatch_control_pid(s); | |
1930 | (void) unit_enqueue_rewatch_pids(UNIT(s)); | |
1931 | ||
1932 | s->control_command = s->exec_command[SERVICE_EXEC_STOP]; | |
1933 | if (s->control_command) { | |
1934 | s->control_command_id = SERVICE_EXEC_STOP; | |
1935 | ||
1936 | r = service_spawn(s, | |
1937 | s->control_command, | |
1938 | s->timeout_stop_usec, | |
1939 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT|EXEC_CONTROL_CGROUP, | |
1940 | &s->control_pid); | |
1941 | if (r < 0) | |
1942 | goto fail; | |
1943 | ||
1944 | service_set_state(s, SERVICE_STOP); | |
1945 | } else | |
1946 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS); | |
1947 | ||
1948 | return; | |
1949 | ||
1950 | fail: | |
1951 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m"); | |
1952 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
1953 | } | |
1954 | ||
1955 | static bool service_good(Service *s) { | |
1956 | int main_pid_ok; | |
1957 | assert(s); | |
1958 | ||
1959 | if (s->type == SERVICE_DBUS && !s->bus_name_good) | |
1960 | return false; | |
1961 | ||
1962 | main_pid_ok = main_pid_good(s); | |
1963 | if (main_pid_ok > 0) /* It's alive */ | |
1964 | return true; | |
1965 | if (main_pid_ok == 0) /* It's dead */ | |
1966 | return false; | |
1967 | ||
1968 | /* OK, we don't know anything about the main PID, maybe | |
1969 | * because there is none. Let's check the control group | |
1970 | * instead. */ | |
1971 | ||
1972 | return cgroup_good(s) != 0; | |
1973 | } | |
1974 | ||
1975 | static void service_enter_running(Service *s, ServiceResult f) { | |
1976 | assert(s); | |
1977 | ||
1978 | if (s->result == SERVICE_SUCCESS) | |
1979 | s->result = f; | |
1980 | ||
1981 | service_unwatch_control_pid(s); | |
1982 | ||
1983 | if (s->result != SERVICE_SUCCESS) | |
1984 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
1985 | else if (service_good(s)) { | |
1986 | ||
1987 | /* If there are any queued up sd_notify() notifications, process them now */ | |
1988 | if (s->notify_state == NOTIFY_RELOADING) | |
1989 | service_enter_reload_by_notify(s); | |
1990 | else if (s->notify_state == NOTIFY_STOPPING) | |
1991 | service_enter_stop_by_notify(s); | |
1992 | else { | |
1993 | service_set_state(s, SERVICE_RUNNING); | |
1994 | service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec)); | |
1995 | } | |
1996 | ||
1997 | } else if (s->remain_after_exit) | |
1998 | service_set_state(s, SERVICE_EXITED); | |
1999 | else | |
2000 | service_enter_stop(s, SERVICE_SUCCESS); | |
2001 | } | |
2002 | ||
2003 | static void service_enter_start_post(Service *s) { | |
2004 | int r; | |
2005 | assert(s); | |
2006 | ||
2007 | service_unwatch_control_pid(s); | |
2008 | service_reset_watchdog(s); | |
2009 | ||
2010 | s->control_command = s->exec_command[SERVICE_EXEC_START_POST]; | |
2011 | if (s->control_command) { | |
2012 | s->control_command_id = SERVICE_EXEC_START_POST; | |
2013 | ||
2014 | r = service_spawn(s, | |
2015 | s->control_command, | |
2016 | s->timeout_start_usec, | |
2017 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_CONTROL_CGROUP, | |
2018 | &s->control_pid); | |
2019 | if (r < 0) | |
2020 | goto fail; | |
2021 | ||
2022 | service_set_state(s, SERVICE_START_POST); | |
2023 | } else | |
2024 | service_enter_running(s, SERVICE_SUCCESS); | |
2025 | ||
2026 | return; | |
2027 | ||
2028 | fail: | |
2029 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m"); | |
2030 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
2031 | } | |
2032 | ||
2033 | static void service_kill_control_process(Service *s) { | |
2034 | int r; | |
2035 | ||
2036 | assert(s); | |
2037 | ||
2038 | if (s->control_pid <= 0) | |
2039 | return; | |
2040 | ||
2041 | r = kill_and_sigcont(s->control_pid, SIGKILL); | |
2042 | if (r < 0) { | |
2043 | _cleanup_free_ char *comm = NULL; | |
2044 | ||
2045 | (void) get_process_comm(s->control_pid, &comm); | |
2046 | ||
2047 | log_unit_debug_errno(UNIT(s), r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m", | |
2048 | s->control_pid, strna(comm)); | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | static int service_adverse_to_leftover_processes(Service *s) { | |
2053 | assert(s); | |
2054 | ||
2055 | /* KillMode=mixed and control group are used to indicate that all process should be killed off. | |
2056 | * SendSIGKILL= is used for services that require a clean shutdown. These are typically database | |
2057 | * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup | |
2058 | * time is quite variable (so Timeout settings aren't of use). | |
2059 | * | |
2060 | * Here we take these two factors and refuse to start a service if there are existing processes | |
2061 | * within a control group. Databases, while generally having some protection against multiple | |
2062 | * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service | |
2063 | * aren't as rigoriously written to protect aganst against multiple use. */ | |
2064 | ||
2065 | if (unit_warn_leftover_processes(UNIT(s), unit_log_leftover_process_start) > 0 && | |
2066 | IN_SET(s->kill_context.kill_mode, KILL_MIXED, KILL_CONTROL_GROUP) && | |
2067 | !s->kill_context.send_sigkill) | |
2068 | return log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(EBUSY), | |
2069 | "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist"); | |
2070 | ||
2071 | return 0; | |
2072 | } | |
2073 | ||
2074 | static void service_enter_start(Service *s) { | |
2075 | ExecCommand *c; | |
2076 | usec_t timeout; | |
2077 | pid_t pid; | |
2078 | int r; | |
2079 | ||
2080 | assert(s); | |
2081 | ||
2082 | service_unwatch_control_pid(s); | |
2083 | service_unwatch_main_pid(s); | |
2084 | ||
2085 | r = service_adverse_to_leftover_processes(s); | |
2086 | if (r < 0) | |
2087 | goto fail; | |
2088 | ||
2089 | if (s->type == SERVICE_FORKING) { | |
2090 | s->control_command_id = SERVICE_EXEC_START; | |
2091 | c = s->control_command = s->exec_command[SERVICE_EXEC_START]; | |
2092 | ||
2093 | s->main_command = NULL; | |
2094 | } else { | |
2095 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
2096 | s->control_command = NULL; | |
2097 | ||
2098 | c = s->main_command = s->exec_command[SERVICE_EXEC_START]; | |
2099 | } | |
2100 | ||
2101 | if (!c) { | |
2102 | if (s->type != SERVICE_ONESHOT) { | |
2103 | /* There's no command line configured for the main command? Hmm, that is strange. | |
2104 | * This can only happen if the configuration changes at runtime. In this case, | |
2105 | * let's enter a failure state. */ | |
2106 | r = log_unit_error_errno(UNIT(s), SYNTHETIC_ERRNO(ENXIO), "There's no 'start' task anymore we could start."); | |
2107 | goto fail; | |
2108 | } | |
2109 | ||
2110 | /* We force a fake state transition here. Otherwise, the unit would go directly from | |
2111 | * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE | |
2112 | * in between. This way we can later trigger actions that depend on the state | |
2113 | * transition, including SuccessAction=. */ | |
2114 | service_set_state(s, SERVICE_START); | |
2115 | ||
2116 | service_enter_start_post(s); | |
2117 | return; | |
2118 | } | |
2119 | ||
2120 | if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) | |
2121 | /* For simple + idle this is the main process. We don't apply any timeout here, but | |
2122 | * service_enter_running() will later apply the .runtime_max_usec timeout. */ | |
2123 | timeout = USEC_INFINITY; | |
2124 | else | |
2125 | timeout = s->timeout_start_usec; | |
2126 | ||
2127 | r = service_spawn(s, | |
2128 | c, | |
2129 | timeout, | |
2130 | EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG|EXEC_WRITE_CREDENTIALS, | |
2131 | &pid); | |
2132 | if (r < 0) | |
2133 | goto fail; | |
2134 | ||
2135 | if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) { | |
2136 | /* For simple services we immediately start | |
2137 | * the START_POST binaries. */ | |
2138 | ||
2139 | service_set_main_pid(s, pid); | |
2140 | service_enter_start_post(s); | |
2141 | ||
2142 | } else if (s->type == SERVICE_FORKING) { | |
2143 | ||
2144 | /* For forking services we wait until the start | |
2145 | * process exited. */ | |
2146 | ||
2147 | s->control_pid = pid; | |
2148 | service_set_state(s, SERVICE_START); | |
2149 | ||
2150 | } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY, SERVICE_EXEC)) { | |
2151 | ||
2152 | /* For oneshot services we wait until the start process exited, too, but it is our main process. */ | |
2153 | ||
2154 | /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the | |
2155 | * bus. 'notify' and 'exec' services are similar. */ | |
2156 | ||
2157 | service_set_main_pid(s, pid); | |
2158 | service_set_state(s, SERVICE_START); | |
2159 | } else | |
2160 | assert_not_reached("Unknown service type"); | |
2161 | ||
2162 | return; | |
2163 | ||
2164 | fail: | |
2165 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m"); | |
2166 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
2167 | } | |
2168 | ||
2169 | static void service_enter_start_pre(Service *s) { | |
2170 | int r; | |
2171 | ||
2172 | assert(s); | |
2173 | ||
2174 | service_unwatch_control_pid(s); | |
2175 | ||
2176 | s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]; | |
2177 | if (s->control_command) { | |
2178 | ||
2179 | r = service_adverse_to_leftover_processes(s); | |
2180 | if (r < 0) | |
2181 | goto fail; | |
2182 | ||
2183 | s->control_command_id = SERVICE_EXEC_START_PRE; | |
2184 | ||
2185 | r = service_spawn(s, | |
2186 | s->control_command, | |
2187 | s->timeout_start_usec, | |
2188 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN, | |
2189 | &s->control_pid); | |
2190 | if (r < 0) | |
2191 | goto fail; | |
2192 | ||
2193 | service_set_state(s, SERVICE_START_PRE); | |
2194 | } else | |
2195 | service_enter_start(s); | |
2196 | ||
2197 | return; | |
2198 | ||
2199 | fail: | |
2200 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m"); | |
2201 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
2202 | } | |
2203 | ||
2204 | static void service_enter_condition(Service *s) { | |
2205 | int r; | |
2206 | ||
2207 | assert(s); | |
2208 | ||
2209 | service_unwatch_control_pid(s); | |
2210 | ||
2211 | s->control_command = s->exec_command[SERVICE_EXEC_CONDITION]; | |
2212 | if (s->control_command) { | |
2213 | ||
2214 | r = service_adverse_to_leftover_processes(s); | |
2215 | if (r < 0) | |
2216 | goto fail; | |
2217 | ||
2218 | s->control_command_id = SERVICE_EXEC_CONDITION; | |
2219 | ||
2220 | r = service_spawn(s, | |
2221 | s->control_command, | |
2222 | s->timeout_start_usec, | |
2223 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN, | |
2224 | &s->control_pid); | |
2225 | ||
2226 | if (r < 0) | |
2227 | goto fail; | |
2228 | ||
2229 | service_set_state(s, SERVICE_CONDITION); | |
2230 | } else | |
2231 | service_enter_start_pre(s); | |
2232 | ||
2233 | return; | |
2234 | ||
2235 | fail: | |
2236 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'exec-condition' task: %m"); | |
2237 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
2238 | } | |
2239 | ||
2240 | static void service_enter_restart(Service *s) { | |
2241 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
2242 | int r; | |
2243 | ||
2244 | assert(s); | |
2245 | ||
2246 | if (unit_has_job_type(UNIT(s), JOB_STOP)) { | |
2247 | /* Don't restart things if we are going down anyway */ | |
2248 | log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart."); | |
2249 | ||
2250 | r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec)); | |
2251 | if (r < 0) | |
2252 | goto fail; | |
2253 | ||
2254 | return; | |
2255 | } | |
2256 | ||
2257 | /* Any units that are bound to this service must also be | |
2258 | * restarted. We use JOB_RESTART (instead of the more obvious | |
2259 | * JOB_START) here so that those dependency jobs will be added | |
2260 | * as well. */ | |
2261 | r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_REPLACE, NULL, &error, NULL); | |
2262 | if (r < 0) | |
2263 | goto fail; | |
2264 | ||
2265 | /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully | |
2266 | * stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset the counter | |
2267 | * explicitly however via the usual "systemctl reset-failure" logic. */ | |
2268 | s->n_restarts ++; | |
2269 | s->flush_n_restarts = false; | |
2270 | ||
2271 | log_unit_struct(UNIT(s), LOG_INFO, | |
2272 | "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR, | |
2273 | LOG_UNIT_INVOCATION_ID(UNIT(s)), | |
2274 | LOG_UNIT_MESSAGE(UNIT(s), "Scheduled restart job, restart counter is at %u.", s->n_restarts), | |
2275 | "N_RESTARTS=%u", s->n_restarts); | |
2276 | ||
2277 | /* Notify clients about changed restart counter */ | |
2278 | unit_add_to_dbus_queue(UNIT(s)); | |
2279 | ||
2280 | /* Note that we stay in the SERVICE_AUTO_RESTART state here, | |
2281 | * it will be canceled as part of the service_stop() call that | |
2282 | * is executed as part of JOB_RESTART. */ | |
2283 | ||
2284 | return; | |
2285 | ||
2286 | fail: | |
2287 | log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, r)); | |
2288 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false); | |
2289 | } | |
2290 | ||
2291 | static void service_enter_reload_by_notify(Service *s) { | |
2292 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
2293 | int r; | |
2294 | ||
2295 | assert(s); | |
2296 | ||
2297 | service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec)); | |
2298 | service_set_state(s, SERVICE_RELOAD); | |
2299 | ||
2300 | /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */ | |
2301 | r = manager_propagate_reload(UNIT(s)->manager, UNIT(s), JOB_FAIL, &error); | |
2302 | if (r < 0) | |
2303 | log_unit_warning(UNIT(s), "Failed to schedule propagation of reload: %s", bus_error_message(&error, r)); | |
2304 | } | |
2305 | ||
2306 | static void service_enter_reload(Service *s) { | |
2307 | int r; | |
2308 | ||
2309 | assert(s); | |
2310 | ||
2311 | service_unwatch_control_pid(s); | |
2312 | s->reload_result = SERVICE_SUCCESS; | |
2313 | ||
2314 | s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]; | |
2315 | if (s->control_command) { | |
2316 | s->control_command_id = SERVICE_EXEC_RELOAD; | |
2317 | ||
2318 | r = service_spawn(s, | |
2319 | s->control_command, | |
2320 | s->timeout_start_usec, | |
2321 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_CONTROL_CGROUP, | |
2322 | &s->control_pid); | |
2323 | if (r < 0) | |
2324 | goto fail; | |
2325 | ||
2326 | service_set_state(s, SERVICE_RELOAD); | |
2327 | } else | |
2328 | service_enter_running(s, SERVICE_SUCCESS); | |
2329 | ||
2330 | return; | |
2331 | ||
2332 | fail: | |
2333 | log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m"); | |
2334 | s->reload_result = SERVICE_FAILURE_RESOURCES; | |
2335 | service_enter_running(s, SERVICE_SUCCESS); | |
2336 | } | |
2337 | ||
2338 | static void service_run_next_control(Service *s) { | |
2339 | usec_t timeout; | |
2340 | int r; | |
2341 | ||
2342 | assert(s); | |
2343 | assert(s->control_command); | |
2344 | assert(s->control_command->command_next); | |
2345 | ||
2346 | assert(s->control_command_id != SERVICE_EXEC_START); | |
2347 | ||
2348 | s->control_command = s->control_command->command_next; | |
2349 | service_unwatch_control_pid(s); | |
2350 | ||
2351 | if (IN_SET(s->state, SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) | |
2352 | timeout = s->timeout_start_usec; | |
2353 | else | |
2354 | timeout = s->timeout_stop_usec; | |
2355 | ||
2356 | r = service_spawn(s, | |
2357 | s->control_command, | |
2358 | timeout, | |
2359 | EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL| | |
2360 | (IN_SET(s->control_command_id, SERVICE_EXEC_CONDITION, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)| | |
2361 | (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0)| | |
2362 | (IN_SET(s->control_command_id, SERVICE_EXEC_START_POST, SERVICE_EXEC_RELOAD, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_CONTROL_CGROUP : 0), | |
2363 | &s->control_pid); | |
2364 | if (r < 0) | |
2365 | goto fail; | |
2366 | ||
2367 | return; | |
2368 | ||
2369 | fail: | |
2370 | log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m"); | |
2371 | ||
2372 | if (IN_SET(s->state, SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START_POST, SERVICE_STOP)) | |
2373 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
2374 | else if (s->state == SERVICE_STOP_POST) | |
2375 | service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true); | |
2376 | else if (s->state == SERVICE_RELOAD) { | |
2377 | s->reload_result = SERVICE_FAILURE_RESOURCES; | |
2378 | service_enter_running(s, SERVICE_SUCCESS); | |
2379 | } else | |
2380 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
2381 | } | |
2382 | ||
2383 | static void service_run_next_main(Service *s) { | |
2384 | pid_t pid; | |
2385 | int r; | |
2386 | ||
2387 | assert(s); | |
2388 | assert(s->main_command); | |
2389 | assert(s->main_command->command_next); | |
2390 | assert(s->type == SERVICE_ONESHOT); | |
2391 | ||
2392 | s->main_command = s->main_command->command_next; | |
2393 | service_unwatch_main_pid(s); | |
2394 | ||
2395 | r = service_spawn(s, | |
2396 | s->main_command, | |
2397 | s->timeout_start_usec, | |
2398 | EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG, | |
2399 | &pid); | |
2400 | if (r < 0) | |
2401 | goto fail; | |
2402 | ||
2403 | service_set_main_pid(s, pid); | |
2404 | ||
2405 | return; | |
2406 | ||
2407 | fail: | |
2408 | log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m"); | |
2409 | service_enter_stop(s, SERVICE_FAILURE_RESOURCES); | |
2410 | } | |
2411 | ||
2412 | static int service_start(Unit *u) { | |
2413 | Service *s = SERVICE(u); | |
2414 | int r; | |
2415 | ||
2416 | assert(s); | |
2417 | ||
2418 | /* We cannot fulfill this request right now, try again later | |
2419 | * please! */ | |
2420 | if (IN_SET(s->state, | |
2421 | SERVICE_STOP, SERVICE_STOP_WATCHDOG, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
2422 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, SERVICE_CLEANING)) | |
2423 | return -EAGAIN; | |
2424 | ||
2425 | /* Already on it! */ | |
2426 | if (IN_SET(s->state, SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST)) | |
2427 | return 0; | |
2428 | ||
2429 | /* A service that will be restarted must be stopped first to | |
2430 | * trigger BindsTo and/or OnFailure dependencies. If a user | |
2431 | * does not want to wait for the holdoff time to elapse, the | |
2432 | * service should be manually restarted, not started. We | |
2433 | * simply return EAGAIN here, so that any start jobs stay | |
2434 | * queued, and assume that the auto restart timer will | |
2435 | * eventually trigger the restart. */ | |
2436 | if (s->state == SERVICE_AUTO_RESTART) | |
2437 | return -EAGAIN; | |
2438 | ||
2439 | assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED)); | |
2440 | ||
2441 | /* Make sure we don't enter a busy loop of some kind. */ | |
2442 | r = unit_test_start_limit(u); | |
2443 | if (r < 0) { | |
2444 | service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false); | |
2445 | return r; | |
2446 | } | |
2447 | ||
2448 | r = unit_acquire_invocation_id(u); | |
2449 | if (r < 0) | |
2450 | return r; | |
2451 | ||
2452 | s->result = SERVICE_SUCCESS; | |
2453 | s->reload_result = SERVICE_SUCCESS; | |
2454 | s->main_pid_known = false; | |
2455 | s->main_pid_alien = false; | |
2456 | s->forbid_restart = false; | |
2457 | ||
2458 | s->status_text = mfree(s->status_text); | |
2459 | s->status_errno = 0; | |
2460 | ||
2461 | s->notify_state = NOTIFY_UNKNOWN; | |
2462 | ||
2463 | s->watchdog_original_usec = s->watchdog_usec; | |
2464 | s->watchdog_override_enable = false; | |
2465 | s->watchdog_override_usec = USEC_INFINITY; | |
2466 | ||
2467 | exec_command_reset_status_list_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX); | |
2468 | exec_status_reset(&s->main_exec_status); | |
2469 | ||
2470 | /* This is not an automatic restart? Flush the restart counter then */ | |
2471 | if (s->flush_n_restarts) { | |
2472 | s->n_restarts = 0; | |
2473 | s->flush_n_restarts = false; | |
2474 | } | |
2475 | ||
2476 | u->reset_accounting = true; | |
2477 | ||
2478 | service_enter_condition(s); | |
2479 | return 1; | |
2480 | } | |
2481 | ||
2482 | static int service_stop(Unit *u) { | |
2483 | Service *s = SERVICE(u); | |
2484 | ||
2485 | assert(s); | |
2486 | ||
2487 | /* Don't create restart jobs from manual stops. */ | |
2488 | s->forbid_restart = true; | |
2489 | ||
2490 | /* Already on it */ | |
2491 | if (IN_SET(s->state, | |
2492 | SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, | |
2493 | SERVICE_FINAL_WATCHDOG, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) | |
2494 | return 0; | |
2495 | ||
2496 | /* A restart will be scheduled or is in progress. */ | |
2497 | if (s->state == SERVICE_AUTO_RESTART) { | |
2498 | service_set_state(s, SERVICE_DEAD); | |
2499 | return 0; | |
2500 | } | |
2501 | ||
2502 | /* If there's already something running we go directly into | |
2503 | * kill mode. */ | |
2504 | if (IN_SET(s->state, SERVICE_CONDITION, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD, SERVICE_STOP_WATCHDOG)) { | |
2505 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS); | |
2506 | return 0; | |
2507 | } | |
2508 | ||
2509 | /* If we are currently cleaning, then abort it, brutally. */ | |
2510 | if (s->state == SERVICE_CLEANING) { | |
2511 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS); | |
2512 | return 0; | |
2513 | } | |
2514 | ||
2515 | assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED)); | |
2516 | ||
2517 | service_enter_stop(s, SERVICE_SUCCESS); | |
2518 | return 1; | |
2519 | } | |
2520 | ||
2521 | static int service_reload(Unit *u) { | |
2522 | Service *s = SERVICE(u); | |
2523 | ||
2524 | assert(s); | |
2525 | ||
2526 | assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED)); | |
2527 | ||
2528 | service_enter_reload(s); | |
2529 | return 1; | |
2530 | } | |
2531 | ||
2532 | _pure_ static bool service_can_reload(Unit *u) { | |
2533 | Service *s = SERVICE(u); | |
2534 | ||
2535 | assert(s); | |
2536 | ||
2537 | return !!s->exec_command[SERVICE_EXEC_RELOAD]; | |
2538 | } | |
2539 | ||
2540 | static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) { | |
2541 | Service *s = SERVICE(u); | |
2542 | unsigned idx = 0; | |
2543 | ExecCommand *first, *c; | |
2544 | ||
2545 | assert(s); | |
2546 | assert(id >= 0); | |
2547 | assert(id < _SERVICE_EXEC_COMMAND_MAX); | |
2548 | ||
2549 | first = s->exec_command[id]; | |
2550 | ||
2551 | /* Figure out where we are in the list by walking back to the beginning */ | |
2552 | for (c = current; c != first; c = c->command_prev) | |
2553 | idx++; | |
2554 | ||
2555 | return idx; | |
2556 | } | |
2557 | ||
2558 | static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) { | |
2559 | _cleanup_free_ char *args = NULL, *p = NULL; | |
2560 | Service *s = SERVICE(u); | |
2561 | const char *type, *key; | |
2562 | ServiceExecCommand id; | |
2563 | size_t length = 0; | |
2564 | unsigned idx; | |
2565 | char **arg; | |
2566 | ||
2567 | assert(s); | |
2568 | assert(f); | |
2569 | ||
2570 | if (!command) | |
2571 | return 0; | |
2572 | ||
2573 | if (command == s->control_command) { | |
2574 | type = "control"; | |
2575 | id = s->control_command_id; | |
2576 | } else { | |
2577 | type = "main"; | |
2578 | id = SERVICE_EXEC_START; | |
2579 | } | |
2580 | ||
2581 | idx = service_exec_command_index(u, id, command); | |
2582 | ||
2583 | STRV_FOREACH(arg, command->argv) { | |
2584 | _cleanup_free_ char *e = NULL; | |
2585 | size_t n; | |
2586 | ||
2587 | e = cescape(*arg); | |
2588 | if (!e) | |
2589 | return log_oom(); | |
2590 | ||
2591 | n = strlen(e); | |
2592 | if (!GREEDY_REALLOC(args, length + 2 + n + 2)) | |
2593 | return log_oom(); | |
2594 | ||
2595 | if (length > 0) | |
2596 | args[length++] = ' '; | |
2597 | ||
2598 | args[length++] = '"'; | |
2599 | memcpy(args + length, e, n); | |
2600 | length += n; | |
2601 | args[length++] = '"'; | |
2602 | } | |
2603 | ||
2604 | if (!GREEDY_REALLOC(args, length + 1)) | |
2605 | return log_oom(); | |
2606 | ||
2607 | args[length++] = 0; | |
2608 | ||
2609 | p = cescape(command->path); | |
2610 | if (!p) | |
2611 | return log_oom(); | |
2612 | ||
2613 | key = strjoina(type, "-command"); | |
2614 | (void) serialize_item_format(f, key, "%s %u %s %s", service_exec_command_to_string(id), idx, p, args); | |
2615 | ||
2616 | return 0; | |
2617 | } | |
2618 | ||
2619 | static int service_serialize(Unit *u, FILE *f, FDSet *fds) { | |
2620 | Service *s = SERVICE(u); | |
2621 | ServiceFDStore *fs; | |
2622 | int r; | |
2623 | ||
2624 | assert(u); | |
2625 | assert(f); | |
2626 | assert(fds); | |
2627 | ||
2628 | (void) serialize_item(f, "state", service_state_to_string(s->state)); | |
2629 | (void) serialize_item(f, "result", service_result_to_string(s->result)); | |
2630 | (void) serialize_item(f, "reload-result", service_result_to_string(s->reload_result)); | |
2631 | ||
2632 | if (s->control_pid > 0) | |
2633 | (void) serialize_item_format(f, "control-pid", PID_FMT, s->control_pid); | |
2634 | ||
2635 | if (s->main_pid_known && s->main_pid > 0) | |
2636 | (void) serialize_item_format(f, "main-pid", PID_FMT, s->main_pid); | |
2637 | ||
2638 | (void) serialize_bool(f, "main-pid-known", s->main_pid_known); | |
2639 | (void) serialize_bool(f, "bus-name-good", s->bus_name_good); | |
2640 | (void) serialize_bool(f, "bus-name-owner", s->bus_name_owner); | |
2641 | ||
2642 | (void) serialize_item_format(f, "n-restarts", "%u", s->n_restarts); | |
2643 | (void) serialize_bool(f, "flush-n-restarts", s->flush_n_restarts); | |
2644 | ||
2645 | r = serialize_item_escaped(f, "status-text", s->status_text); | |
2646 | if (r < 0) | |
2647 | return r; | |
2648 | ||
2649 | service_serialize_exec_command(u, f, s->control_command); | |
2650 | service_serialize_exec_command(u, f, s->main_command); | |
2651 | ||
2652 | r = serialize_fd(f, fds, "stdin-fd", s->stdin_fd); | |
2653 | if (r < 0) | |
2654 | return r; | |
2655 | r = serialize_fd(f, fds, "stdout-fd", s->stdout_fd); | |
2656 | if (r < 0) | |
2657 | return r; | |
2658 | r = serialize_fd(f, fds, "stderr-fd", s->stderr_fd); | |
2659 | if (r < 0) | |
2660 | return r; | |
2661 | ||
2662 | if (s->exec_fd_event_source) { | |
2663 | r = serialize_fd(f, fds, "exec-fd", sd_event_source_get_io_fd(s->exec_fd_event_source)); | |
2664 | if (r < 0) | |
2665 | return r; | |
2666 | ||
2667 | (void) serialize_bool(f, "exec-fd-hot", s->exec_fd_hot); | |
2668 | } | |
2669 | ||
2670 | if (UNIT_ISSET(s->accept_socket)) { | |
2671 | r = serialize_item(f, "accept-socket", UNIT_DEREF(s->accept_socket)->id); | |
2672 | if (r < 0) | |
2673 | return r; | |
2674 | } | |
2675 | ||
2676 | r = serialize_fd(f, fds, "socket-fd", s->socket_fd); | |
2677 | if (r < 0) | |
2678 | return r; | |
2679 | ||
2680 | LIST_FOREACH(fd_store, fs, s->fd_store) { | |
2681 | _cleanup_free_ char *c = NULL; | |
2682 | int copy; | |
2683 | ||
2684 | copy = fdset_put_dup(fds, fs->fd); | |
2685 | if (copy < 0) | |
2686 | return log_error_errno(copy, "Failed to copy file descriptor for serialization: %m"); | |
2687 | ||
2688 | c = cescape(fs->fdname); | |
2689 | if (!c) | |
2690 | return log_oom(); | |
2691 | ||
2692 | (void) serialize_item_format(f, "fd-store-fd", "%i \"%s\" %i", copy, c, fs->do_poll); | |
2693 | } | |
2694 | ||
2695 | if (s->main_exec_status.pid > 0) { | |
2696 | (void) serialize_item_format(f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid); | |
2697 | (void) serialize_dual_timestamp(f, "main-exec-status-start", &s->main_exec_status.start_timestamp); | |
2698 | (void) serialize_dual_timestamp(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp); | |
2699 | ||
2700 | if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) { | |
2701 | (void) serialize_item_format(f, "main-exec-status-code", "%i", s->main_exec_status.code); | |
2702 | (void) serialize_item_format(f, "main-exec-status-status", "%i", s->main_exec_status.status); | |
2703 | } | |
2704 | } | |
2705 | ||
2706 | (void) serialize_dual_timestamp(f, "watchdog-timestamp", &s->watchdog_timestamp); | |
2707 | (void) serialize_bool(f, "forbid-restart", s->forbid_restart); | |
2708 | ||
2709 | if (s->watchdog_override_enable) | |
2710 | (void) serialize_item_format(f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec); | |
2711 | ||
2712 | if (s->watchdog_original_usec != USEC_INFINITY) | |
2713 | (void) serialize_item_format(f, "watchdog-original-usec", USEC_FMT, s->watchdog_original_usec); | |
2714 | ||
2715 | return 0; | |
2716 | } | |
2717 | ||
2718 | int service_deserialize_exec_command( | |
2719 | Unit *u, | |
2720 | const char *key, | |
2721 | const char *value) { | |
2722 | ||
2723 | Service *s = SERVICE(u); | |
2724 | int r; | |
2725 | unsigned idx = 0, i; | |
2726 | bool control, found = false; | |
2727 | ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID; | |
2728 | ExecCommand *command = NULL; | |
2729 | _cleanup_free_ char *path = NULL; | |
2730 | _cleanup_strv_free_ char **argv = NULL; | |
2731 | ||
2732 | enum ExecCommandState { | |
2733 | STATE_EXEC_COMMAND_TYPE, | |
2734 | STATE_EXEC_COMMAND_INDEX, | |
2735 | STATE_EXEC_COMMAND_PATH, | |
2736 | STATE_EXEC_COMMAND_ARGS, | |
2737 | _STATE_EXEC_COMMAND_MAX, | |
2738 | _STATE_EXEC_COMMAND_INVALID = -EINVAL, | |
2739 | } state; | |
2740 | ||
2741 | assert(s); | |
2742 | assert(key); | |
2743 | assert(value); | |
2744 | ||
2745 | control = streq(key, "control-command"); | |
2746 | ||
2747 | state = STATE_EXEC_COMMAND_TYPE; | |
2748 | ||
2749 | for (;;) { | |
2750 | _cleanup_free_ char *arg = NULL; | |
2751 | ||
2752 | r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE | EXTRACT_UNQUOTE); | |
2753 | if (r < 0) | |
2754 | return r; | |
2755 | if (r == 0) | |
2756 | break; | |
2757 | ||
2758 | switch (state) { | |
2759 | case STATE_EXEC_COMMAND_TYPE: | |
2760 | id = service_exec_command_from_string(arg); | |
2761 | if (id < 0) | |
2762 | return id; | |
2763 | ||
2764 | state = STATE_EXEC_COMMAND_INDEX; | |
2765 | break; | |
2766 | case STATE_EXEC_COMMAND_INDEX: | |
2767 | r = safe_atou(arg, &idx); | |
2768 | if (r < 0) | |
2769 | return r; | |
2770 | ||
2771 | state = STATE_EXEC_COMMAND_PATH; | |
2772 | break; | |
2773 | case STATE_EXEC_COMMAND_PATH: | |
2774 | path = TAKE_PTR(arg); | |
2775 | state = STATE_EXEC_COMMAND_ARGS; | |
2776 | break; | |
2777 | case STATE_EXEC_COMMAND_ARGS: | |
2778 | r = strv_extend(&argv, arg); | |
2779 | if (r < 0) | |
2780 | return -ENOMEM; | |
2781 | break; | |
2782 | default: | |
2783 | assert_not_reached("Logic error in exec command deserialization"); | |
2784 | } | |
2785 | } | |
2786 | ||
2787 | if (state != STATE_EXEC_COMMAND_ARGS) | |
2788 | return -EINVAL; | |
2789 | if (strv_isempty(argv)) | |
2790 | return -EINVAL; /* At least argv[0] must be always present. */ | |
2791 | ||
2792 | /* Let's check whether exec command on given offset matches data that we just deserialized */ | |
2793 | for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) { | |
2794 | if (i != idx) | |
2795 | continue; | |
2796 | ||
2797 | found = strv_equal(argv, command->argv) && streq(command->path, path); | |
2798 | break; | |
2799 | } | |
2800 | ||
2801 | if (!found) { | |
2802 | /* Command at the index we serialized is different, let's look for command that exactly | |
2803 | * matches but is on different index. If there is no such command we will not resume execution. */ | |
2804 | for (command = s->exec_command[id]; command; command = command->command_next) | |
2805 | if (strv_equal(command->argv, argv) && streq(command->path, path)) | |
2806 | break; | |
2807 | } | |
2808 | ||
2809 | if (command && control) { | |
2810 | s->control_command = command; | |
2811 | s->control_command_id = id; | |
2812 | } else if (command) | |
2813 | s->main_command = command; | |
2814 | else | |
2815 | log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed."); | |
2816 | ||
2817 | return 0; | |
2818 | } | |
2819 | ||
2820 | static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
2821 | Service *s = SERVICE(u); | |
2822 | int r; | |
2823 | ||
2824 | assert(u); | |
2825 | assert(key); | |
2826 | assert(value); | |
2827 | assert(fds); | |
2828 | ||
2829 | if (streq(key, "state")) { | |
2830 | ServiceState state; | |
2831 | ||
2832 | state = service_state_from_string(value); | |
2833 | if (state < 0) | |
2834 | log_unit_debug(u, "Failed to parse state value: %s", value); | |
2835 | else | |
2836 | s->deserialized_state = state; | |
2837 | } else if (streq(key, "result")) { | |
2838 | ServiceResult f; | |
2839 | ||
2840 | f = service_result_from_string(value); | |
2841 | if (f < 0) | |
2842 | log_unit_debug(u, "Failed to parse result value: %s", value); | |
2843 | else if (f != SERVICE_SUCCESS) | |
2844 | s->result = f; | |
2845 | ||
2846 | } else if (streq(key, "reload-result")) { | |
2847 | ServiceResult f; | |
2848 | ||
2849 | f = service_result_from_string(value); | |
2850 | if (f < 0) | |
2851 | log_unit_debug(u, "Failed to parse reload result value: %s", value); | |
2852 | else if (f != SERVICE_SUCCESS) | |
2853 | s->reload_result = f; | |
2854 | ||
2855 | } else if (streq(key, "control-pid")) { | |
2856 | pid_t pid; | |
2857 | ||
2858 | if (parse_pid(value, &pid) < 0) | |
2859 | log_unit_debug(u, "Failed to parse control-pid value: %s", value); | |
2860 | else | |
2861 | s->control_pid = pid; | |
2862 | } else if (streq(key, "main-pid")) { | |
2863 | pid_t pid; | |
2864 | ||
2865 | if (parse_pid(value, &pid) < 0) | |
2866 | log_unit_debug(u, "Failed to parse main-pid value: %s", value); | |
2867 | else | |
2868 | (void) service_set_main_pid(s, pid); | |
2869 | } else if (streq(key, "main-pid-known")) { | |
2870 | int b; | |
2871 | ||
2872 | b = parse_boolean(value); | |
2873 | if (b < 0) | |
2874 | log_unit_debug(u, "Failed to parse main-pid-known value: %s", value); | |
2875 | else | |
2876 | s->main_pid_known = b; | |
2877 | } else if (streq(key, "bus-name-good")) { | |
2878 | int b; | |
2879 | ||
2880 | b = parse_boolean(value); | |
2881 | if (b < 0) | |
2882 | log_unit_debug(u, "Failed to parse bus-name-good value: %s", value); | |
2883 | else | |
2884 | s->bus_name_good = b; | |
2885 | } else if (streq(key, "bus-name-owner")) { | |
2886 | r = free_and_strdup(&s->bus_name_owner, value); | |
2887 | if (r < 0) | |
2888 | log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value); | |
2889 | } else if (streq(key, "status-text")) { | |
2890 | char *t; | |
2891 | ssize_t l; | |
2892 | ||
2893 | l = cunescape(value, 0, &t); | |
2894 | if (l < 0) | |
2895 | log_unit_debug_errno(u, l, "Failed to unescape status text '%s': %m", value); | |
2896 | else | |
2897 | free_and_replace(s->status_text, t); | |
2898 | ||
2899 | } else if (streq(key, "accept-socket")) { | |
2900 | Unit *socket; | |
2901 | ||
2902 | r = manager_load_unit(u->manager, value, NULL, NULL, &socket); | |
2903 | if (r < 0) | |
2904 | log_unit_debug_errno(u, r, "Failed to load accept-socket unit '%s': %m", value); | |
2905 | else { | |
2906 | unit_ref_set(&s->accept_socket, u, socket); | |
2907 | SOCKET(socket)->n_connections++; | |
2908 | } | |
2909 | ||
2910 | } else if (streq(key, "socket-fd")) { | |
2911 | int fd; | |
2912 | ||
2913 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2914 | log_unit_debug(u, "Failed to parse socket-fd value: %s", value); | |
2915 | else { | |
2916 | asynchronous_close(s->socket_fd); | |
2917 | s->socket_fd = fdset_remove(fds, fd); | |
2918 | } | |
2919 | } else if (streq(key, "fd-store-fd")) { | |
2920 | _cleanup_free_ char *fdv = NULL, *fdn = NULL, *fdp = NULL; | |
2921 | int fd; | |
2922 | int do_poll; | |
2923 | ||
2924 | r = extract_first_word(&value, &fdv, NULL, 0); | |
2925 | if (r <= 0 || safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) { | |
2926 | log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value); | |
2927 | return 0; | |
2928 | } | |
2929 | ||
2930 | r = extract_first_word(&value, &fdn, NULL, EXTRACT_CUNESCAPE | EXTRACT_UNQUOTE); | |
2931 | if (r <= 0) { | |
2932 | log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value); | |
2933 | return 0; | |
2934 | } | |
2935 | ||
2936 | r = extract_first_word(&value, &fdp, NULL, 0); | |
2937 | if (r == 0) { | |
2938 | /* If the value is not present, we assume the default */ | |
2939 | do_poll = 1; | |
2940 | } else if (r < 0 || safe_atoi(fdp, &do_poll) < 0) { | |
2941 | log_unit_debug_errno(u, r, "Failed to parse fd-store-fd value \"%s\": %m", value); | |
2942 | return 0; | |
2943 | } | |
2944 | ||
2945 | r = service_add_fd_store(s, fd, fdn, do_poll); | |
2946 | if (r < 0) | |
2947 | log_unit_error_errno(u, r, "Failed to add fd to store: %m"); | |
2948 | else | |
2949 | fdset_remove(fds, fd); | |
2950 | } else if (streq(key, "main-exec-status-pid")) { | |
2951 | pid_t pid; | |
2952 | ||
2953 | if (parse_pid(value, &pid) < 0) | |
2954 | log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value); | |
2955 | else | |
2956 | s->main_exec_status.pid = pid; | |
2957 | } else if (streq(key, "main-exec-status-code")) { | |
2958 | int i; | |
2959 | ||
2960 | if (safe_atoi(value, &i) < 0) | |
2961 | log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value); | |
2962 | else | |
2963 | s->main_exec_status.code = i; | |
2964 | } else if (streq(key, "main-exec-status-status")) { | |
2965 | int i; | |
2966 | ||
2967 | if (safe_atoi(value, &i) < 0) | |
2968 | log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value); | |
2969 | else | |
2970 | s->main_exec_status.status = i; | |
2971 | } else if (streq(key, "main-exec-status-start")) | |
2972 | deserialize_dual_timestamp(value, &s->main_exec_status.start_timestamp); | |
2973 | else if (streq(key, "main-exec-status-exit")) | |
2974 | deserialize_dual_timestamp(value, &s->main_exec_status.exit_timestamp); | |
2975 | else if (streq(key, "watchdog-timestamp")) | |
2976 | deserialize_dual_timestamp(value, &s->watchdog_timestamp); | |
2977 | else if (streq(key, "forbid-restart")) { | |
2978 | int b; | |
2979 | ||
2980 | b = parse_boolean(value); | |
2981 | if (b < 0) | |
2982 | log_unit_debug(u, "Failed to parse forbid-restart value: %s", value); | |
2983 | else | |
2984 | s->forbid_restart = b; | |
2985 | } else if (streq(key, "stdin-fd")) { | |
2986 | int fd; | |
2987 | ||
2988 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2989 | log_unit_debug(u, "Failed to parse stdin-fd value: %s", value); | |
2990 | else { | |
2991 | asynchronous_close(s->stdin_fd); | |
2992 | s->stdin_fd = fdset_remove(fds, fd); | |
2993 | s->exec_context.stdio_as_fds = true; | |
2994 | } | |
2995 | } else if (streq(key, "stdout-fd")) { | |
2996 | int fd; | |
2997 | ||
2998 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
2999 | log_unit_debug(u, "Failed to parse stdout-fd value: %s", value); | |
3000 | else { | |
3001 | asynchronous_close(s->stdout_fd); | |
3002 | s->stdout_fd = fdset_remove(fds, fd); | |
3003 | s->exec_context.stdio_as_fds = true; | |
3004 | } | |
3005 | } else if (streq(key, "stderr-fd")) { | |
3006 | int fd; | |
3007 | ||
3008 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
3009 | log_unit_debug(u, "Failed to parse stderr-fd value: %s", value); | |
3010 | else { | |
3011 | asynchronous_close(s->stderr_fd); | |
3012 | s->stderr_fd = fdset_remove(fds, fd); | |
3013 | s->exec_context.stdio_as_fds = true; | |
3014 | } | |
3015 | } else if (streq(key, "exec-fd")) { | |
3016 | int fd; | |
3017 | ||
3018 | if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) | |
3019 | log_unit_debug(u, "Failed to parse exec-fd value: %s", value); | |
3020 | else { | |
3021 | s->exec_fd_event_source = sd_event_source_disable_unref(s->exec_fd_event_source); | |
3022 | ||
3023 | fd = fdset_remove(fds, fd); | |
3024 | if (service_allocate_exec_fd_event_source(s, fd, &s->exec_fd_event_source) < 0) | |
3025 | safe_close(fd); | |
3026 | } | |
3027 | } else if (streq(key, "watchdog-override-usec")) { | |
3028 | if (deserialize_usec(value, &s->watchdog_override_usec) < 0) | |
3029 | log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value); | |
3030 | else | |
3031 | s->watchdog_override_enable = true; | |
3032 | ||
3033 | } else if (streq(key, "watchdog-original-usec")) { | |
3034 | if (deserialize_usec(value, &s->watchdog_original_usec) < 0) | |
3035 | log_unit_debug(u, "Failed to parse watchdog_original_usec value: %s", value); | |
3036 | ||
3037 | } else if (STR_IN_SET(key, "main-command", "control-command")) { | |
3038 | r = service_deserialize_exec_command(u, key, value); | |
3039 | if (r < 0) | |
3040 | log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value); | |
3041 | ||
3042 | } else if (streq(key, "n-restarts")) { | |
3043 | r = safe_atou(value, &s->n_restarts); | |
3044 | if (r < 0) | |
3045 | log_unit_debug_errno(u, r, "Failed to parse serialized restart counter '%s': %m", value); | |
3046 | ||
3047 | } else if (streq(key, "flush-n-restarts")) { | |
3048 | r = parse_boolean(value); | |
3049 | if (r < 0) | |
3050 | log_unit_debug_errno(u, r, "Failed to parse serialized flush restart counter setting '%s': %m", value); | |
3051 | else | |
3052 | s->flush_n_restarts = r; | |
3053 | } else | |
3054 | log_unit_debug(u, "Unknown serialization key: %s", key); | |
3055 | ||
3056 | return 0; | |
3057 | } | |
3058 | ||
3059 | _pure_ static UnitActiveState service_active_state(Unit *u) { | |
3060 | const UnitActiveState *table; | |
3061 | ||
3062 | assert(u); | |
3063 | ||
3064 | table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table; | |
3065 | ||
3066 | return table[SERVICE(u)->state]; | |
3067 | } | |
3068 | ||
3069 | static const char *service_sub_state_to_string(Unit *u) { | |
3070 | assert(u); | |
3071 | ||
3072 | return service_state_to_string(SERVICE(u)->state); | |
3073 | } | |
3074 | ||
3075 | static bool service_may_gc(Unit *u) { | |
3076 | Service *s = SERVICE(u); | |
3077 | ||
3078 | assert(s); | |
3079 | ||
3080 | /* Never clean up services that still have a process around, even if the service is formally dead. Note that | |
3081 | * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they | |
3082 | * have moved outside of the cgroup. */ | |
3083 | ||
3084 | if (main_pid_good(s) > 0 || | |
3085 | control_pid_good(s) > 0) | |
3086 | return false; | |
3087 | ||
3088 | return true; | |
3089 | } | |
3090 | ||
3091 | static int service_retry_pid_file(Service *s) { | |
3092 | int r; | |
3093 | ||
3094 | assert(s->pid_file); | |
3095 | assert(IN_SET(s->state, SERVICE_START, SERVICE_START_POST)); | |
3096 | ||
3097 | r = service_load_pid_file(s, false); | |
3098 | if (r < 0) | |
3099 | return r; | |
3100 | ||
3101 | service_unwatch_pid_file(s); | |
3102 | ||
3103 | service_enter_running(s, SERVICE_SUCCESS); | |
3104 | return 0; | |
3105 | } | |
3106 | ||
3107 | static int service_watch_pid_file(Service *s) { | |
3108 | int r; | |
3109 | ||
3110 | log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path); | |
3111 | ||
3112 | r = path_spec_watch(s->pid_file_pathspec, service_dispatch_inotify_io); | |
3113 | if (r < 0) | |
3114 | goto fail; | |
3115 | ||
3116 | /* the pidfile might have appeared just before we set the watch */ | |
3117 | log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path); | |
3118 | service_retry_pid_file(s); | |
3119 | ||
3120 | return 0; | |
3121 | fail: | |
3122 | log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path); | |
3123 | service_unwatch_pid_file(s); | |
3124 | return r; | |
3125 | } | |
3126 | ||
3127 | static int service_demand_pid_file(Service *s) { | |
3128 | PathSpec *ps; | |
3129 | ||
3130 | assert(s->pid_file); | |
3131 | assert(!s->pid_file_pathspec); | |
3132 | ||
3133 | ps = new0(PathSpec, 1); | |
3134 | if (!ps) | |
3135 | return -ENOMEM; | |
3136 | ||
3137 | ps->unit = UNIT(s); | |
3138 | ps->path = strdup(s->pid_file); | |
3139 | if (!ps->path) { | |
3140 | free(ps); | |
3141 | return -ENOMEM; | |
3142 | } | |
3143 | ||
3144 | path_simplify(ps->path); | |
3145 | ||
3146 | /* PATH_CHANGED would not be enough. There are daemons (sendmail) that | |
3147 | * keep their PID file open all the time. */ | |
3148 | ps->type = PATH_MODIFIED; | |
3149 | ps->inotify_fd = -1; | |
3150 | ||
3151 | s->pid_file_pathspec = ps; | |
3152 | ||
3153 | return service_watch_pid_file(s); | |
3154 | } | |
3155 | ||
3156 | static int service_dispatch_inotify_io(sd_event_source *source, int fd, uint32_t events, void *userdata) { | |
3157 | PathSpec *p = userdata; | |
3158 | Service *s; | |
3159 | ||
3160 | assert(p); | |
3161 | ||
3162 | s = SERVICE(p->unit); | |
3163 | ||
3164 | assert(s); | |
3165 | assert(fd >= 0); | |
3166 | assert(IN_SET(s->state, SERVICE_START, SERVICE_START_POST)); | |
3167 | assert(s->pid_file_pathspec); | |
3168 | assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd)); | |
3169 | ||
3170 | log_unit_debug(UNIT(s), "inotify event"); | |
3171 | ||
3172 | if (path_spec_fd_event(p, events) < 0) | |
3173 | goto fail; | |
3174 | ||
3175 | if (service_retry_pid_file(s) == 0) | |
3176 | return 0; | |
3177 | ||
3178 | if (service_watch_pid_file(s) < 0) | |
3179 | goto fail; | |
3180 | ||
3181 | return 0; | |
3182 | ||
3183 | fail: | |
3184 | service_unwatch_pid_file(s); | |
3185 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES); | |
3186 | return 0; | |
3187 | } | |
3188 | ||
3189 | static int service_dispatch_exec_io(sd_event_source *source, int fd, uint32_t events, void *userdata) { | |
3190 | Service *s = SERVICE(userdata); | |
3191 | ||
3192 | assert(s); | |
3193 | ||
3194 | log_unit_debug(UNIT(s), "got exec-fd event"); | |
3195 | ||
3196 | /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve() | |
3197 | * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically | |
3198 | * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the | |
3199 | * parent. We need to be careful however, as there are other reasons that we might cause the child's side of | |
3200 | * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless | |
3201 | * the child signalled us first that it is about to call the execve(). It does so by sending us a simple | |
3202 | * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it | |
3203 | * sends a zero byte we'll ignore POLLHUP on the fd again. */ | |
3204 | ||
3205 | for (;;) { | |
3206 | uint8_t x; | |
3207 | ssize_t n; | |
3208 | ||
3209 | n = read(fd, &x, sizeof(x)); | |
3210 | if (n < 0) { | |
3211 | if (errno == EAGAIN) /* O_NONBLOCK in effect → everything queued has now been processed. */ | |
3212 | return 0; | |
3213 | ||
3214 | return log_unit_error_errno(UNIT(s), errno, "Failed to read from exec_fd: %m"); | |
3215 | } | |
3216 | if (n == 0) { /* EOF → the event we are waiting for */ | |
3217 | ||
3218 | s->exec_fd_event_source = sd_event_source_disable_unref(s->exec_fd_event_source); | |
3219 | ||
3220 | if (s->exec_fd_hot) { /* Did the child tell us to expect EOF now? */ | |
3221 | log_unit_debug(UNIT(s), "Got EOF on exec-fd"); | |
3222 | ||
3223 | s->exec_fd_hot = false; | |
3224 | ||
3225 | /* Nice! This is what we have been waiting for. Transition to next state. */ | |
3226 | if (s->type == SERVICE_EXEC && s->state == SERVICE_START) | |
3227 | service_enter_start_post(s); | |
3228 | } else | |
3229 | log_unit_debug(UNIT(s), "Got EOF on exec-fd while it was disabled, ignoring."); | |
3230 | ||
3231 | return 0; | |
3232 | } | |
3233 | ||
3234 | /* A byte was read → this turns on/off the exec fd logic */ | |
3235 | assert(n == sizeof(x)); | |
3236 | s->exec_fd_hot = x; | |
3237 | } | |
3238 | ||
3239 | return 0; | |
3240 | } | |
3241 | ||
3242 | static void service_notify_cgroup_empty_event(Unit *u) { | |
3243 | Service *s = SERVICE(u); | |
3244 | ||
3245 | assert(u); | |
3246 | ||
3247 | log_unit_debug(u, "Control group is empty."); | |
3248 | ||
3249 | switch (s->state) { | |
3250 | ||
3251 | /* Waiting for SIGCHLD is usually more interesting, | |
3252 | * because it includes return codes/signals. Which is | |
3253 | * why we ignore the cgroup events for most cases, | |
3254 | * except when we don't know pid which to expect the | |
3255 | * SIGCHLD for. */ | |
3256 | ||
3257 | case SERVICE_START: | |
3258 | if (s->type == SERVICE_NOTIFY && | |
3259 | main_pid_good(s) == 0 && | |
3260 | control_pid_good(s) == 0) { | |
3261 | /* No chance of getting a ready notification anymore */ | |
3262 | service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL); | |
3263 | break; | |
3264 | } | |
3265 | ||
3266 | _fallthrough_; | |
3267 | case SERVICE_START_POST: | |
3268 | if (s->pid_file_pathspec && | |
3269 | main_pid_good(s) == 0 && | |
3270 | control_pid_good(s) == 0) { | |
3271 | ||
3272 | /* Give up hoping for the daemon to write its PID file */ | |
3273 | log_unit_warning(u, "Daemon never wrote its PID file. Failing."); | |
3274 | ||
3275 | service_unwatch_pid_file(s); | |
3276 | if (s->state == SERVICE_START) | |
3277 | service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL); | |
3278 | else | |
3279 | service_enter_stop(s, SERVICE_FAILURE_PROTOCOL); | |
3280 | } | |
3281 | break; | |
3282 | ||
3283 | case SERVICE_RUNNING: | |
3284 | /* service_enter_running() will figure out what to do */ | |
3285 | service_enter_running(s, SERVICE_SUCCESS); | |
3286 | break; | |
3287 | ||
3288 | case SERVICE_STOP_WATCHDOG: | |
3289 | case SERVICE_STOP_SIGTERM: | |
3290 | case SERVICE_STOP_SIGKILL: | |
3291 | ||
3292 | if (main_pid_good(s) <= 0 && control_pid_good(s) <= 0) | |
3293 | service_enter_stop_post(s, SERVICE_SUCCESS); | |
3294 | ||
3295 | break; | |
3296 | ||
3297 | case SERVICE_STOP_POST: | |
3298 | case SERVICE_FINAL_WATCHDOG: | |
3299 | case SERVICE_FINAL_SIGTERM: | |
3300 | case SERVICE_FINAL_SIGKILL: | |
3301 | if (main_pid_good(s) <= 0 && control_pid_good(s) <= 0) | |
3302 | service_enter_dead(s, SERVICE_SUCCESS, true); | |
3303 | ||
3304 | break; | |
3305 | ||
3306 | /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean | |
3307 | * up the cgroup earlier and should do it now. */ | |
3308 | case SERVICE_DEAD: | |
3309 | case SERVICE_FAILED: | |
3310 | unit_prune_cgroup(u); | |
3311 | break; | |
3312 | ||
3313 | default: | |
3314 | ; | |
3315 | } | |
3316 | } | |
3317 | ||
3318 | static void service_notify_cgroup_oom_event(Unit *u) { | |
3319 | Service *s = SERVICE(u); | |
3320 | ||
3321 | log_unit_debug(u, "Process of control group was killed by the OOM killer."); | |
3322 | ||
3323 | if (s->oom_policy == OOM_CONTINUE) | |
3324 | return; | |
3325 | ||
3326 | switch (s->state) { | |
3327 | ||
3328 | case SERVICE_CONDITION: | |
3329 | case SERVICE_START_PRE: | |
3330 | case SERVICE_START: | |
3331 | case SERVICE_START_POST: | |
3332 | case SERVICE_STOP: | |
3333 | if (s->oom_policy == OOM_STOP) | |
3334 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_OOM_KILL); | |
3335 | else if (s->oom_policy == OOM_KILL) | |
3336 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_OOM_KILL); | |
3337 | ||
3338 | break; | |
3339 | ||
3340 | case SERVICE_EXITED: | |
3341 | case SERVICE_RUNNING: | |
3342 | if (s->oom_policy == OOM_STOP) | |
3343 | service_enter_stop(s, SERVICE_FAILURE_OOM_KILL); | |
3344 | else if (s->oom_policy == OOM_KILL) | |
3345 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_OOM_KILL); | |
3346 | ||
3347 | break; | |
3348 | ||
3349 | case SERVICE_STOP_WATCHDOG: | |
3350 | case SERVICE_STOP_SIGTERM: | |
3351 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_OOM_KILL); | |
3352 | break; | |
3353 | ||
3354 | case SERVICE_STOP_SIGKILL: | |
3355 | case SERVICE_FINAL_SIGKILL: | |
3356 | if (s->result == SERVICE_SUCCESS) | |
3357 | s->result = SERVICE_FAILURE_OOM_KILL; | |
3358 | break; | |
3359 | ||
3360 | case SERVICE_STOP_POST: | |
3361 | case SERVICE_FINAL_SIGTERM: | |
3362 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_OOM_KILL); | |
3363 | break; | |
3364 | ||
3365 | default: | |
3366 | ; | |
3367 | } | |
3368 | } | |
3369 | ||
3370 | static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) { | |
3371 | bool notify_dbus = true; | |
3372 | Service *s = SERVICE(u); | |
3373 | ServiceResult f; | |
3374 | ExitClean clean_mode; | |
3375 | ||
3376 | assert(s); | |
3377 | assert(pid >= 0); | |
3378 | ||
3379 | /* Oneshot services and non-SERVICE_EXEC_START commands should not be | |
3380 | * considered daemons as they are typically not long running. */ | |
3381 | if (s->type == SERVICE_ONESHOT || (s->control_pid == pid && s->control_command_id != SERVICE_EXEC_START)) | |
3382 | clean_mode = EXIT_CLEAN_COMMAND; | |
3383 | else | |
3384 | clean_mode = EXIT_CLEAN_DAEMON; | |
3385 | ||
3386 | if (is_clean_exit(code, status, clean_mode, &s->success_status)) | |
3387 | f = SERVICE_SUCCESS; | |
3388 | else if (code == CLD_EXITED) | |
3389 | f = SERVICE_FAILURE_EXIT_CODE; | |
3390 | else if (code == CLD_KILLED) | |
3391 | f = SERVICE_FAILURE_SIGNAL; | |
3392 | else if (code == CLD_DUMPED) | |
3393 | f = SERVICE_FAILURE_CORE_DUMP; | |
3394 | else | |
3395 | assert_not_reached("Unknown code"); | |
3396 | ||
3397 | if (s->main_pid == pid) { | |
3398 | /* Clean up the exec_fd event source. We want to do this here, not later in | |
3399 | * service_set_state(), because service_enter_stop_post() calls service_spawn(). | |
3400 | * The source owns its end of the pipe, so this will close that too. */ | |
3401 | s->exec_fd_event_source = sd_event_source_disable_unref(s->exec_fd_event_source); | |
3402 | ||
3403 | /* Forking services may occasionally move to a new PID. | |
3404 | * As long as they update the PID file before exiting the old | |
3405 | * PID, they're fine. */ | |
3406 | if (service_load_pid_file(s, false) > 0) | |
3407 | return; | |
3408 | ||
3409 | s->main_pid = 0; | |
3410 | exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status); | |
3411 | ||
3412 | if (s->main_command) { | |
3413 | /* If this is not a forking service than the | |
3414 | * main process got started and hence we copy | |
3415 | * the exit status so that it is recorded both | |
3416 | * as main and as control process exit | |
3417 | * status */ | |
3418 | ||
3419 | s->main_command->exec_status = s->main_exec_status; | |
3420 | ||
3421 | if (s->main_command->flags & EXEC_COMMAND_IGNORE_FAILURE) | |
3422 | f = SERVICE_SUCCESS; | |
3423 | } else if (s->exec_command[SERVICE_EXEC_START]) { | |
3424 | ||
3425 | /* If this is a forked process, then we should | |
3426 | * ignore the return value if this was | |
3427 | * configured for the starter process */ | |
3428 | ||
3429 | if (s->exec_command[SERVICE_EXEC_START]->flags & EXEC_COMMAND_IGNORE_FAILURE) | |
3430 | f = SERVICE_SUCCESS; | |
3431 | } | |
3432 | ||
3433 | unit_log_process_exit( | |
3434 | u, | |
3435 | "Main process", | |
3436 | service_exec_command_to_string(SERVICE_EXEC_START), | |
3437 | f == SERVICE_SUCCESS, | |
3438 | code, status); | |
3439 | ||
3440 | if (s->result == SERVICE_SUCCESS) | |
3441 | s->result = f; | |
3442 | ||
3443 | if (s->main_command && | |
3444 | s->main_command->command_next && | |
3445 | s->type == SERVICE_ONESHOT && | |
3446 | f == SERVICE_SUCCESS) { | |
3447 | ||
3448 | /* There is another command to execute, so let's do that. */ | |
3449 | ||
3450 | log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state)); | |
3451 | service_run_next_main(s); | |
3452 | ||
3453 | } else { | |
3454 | ||
3455 | /* The service exited, so the service is officially gone. */ | |
3456 | s->main_command = NULL; | |
3457 | ||
3458 | switch (s->state) { | |
3459 | ||
3460 | case SERVICE_START_POST: | |
3461 | case SERVICE_RELOAD: | |
3462 | /* If neither main nor control processes are running then | |
3463 | * the current state can never exit cleanly, hence immediately | |
3464 | * terminate the service. */ | |
3465 | if (control_pid_good(s) <= 0) | |
3466 | service_enter_stop(s, f); | |
3467 | ||
3468 | /* Otherwise need to wait until the operation is done. */ | |
3469 | break; | |
3470 | ||
3471 | case SERVICE_STOP: | |
3472 | /* Need to wait until the operation is done. */ | |
3473 | break; | |
3474 | ||
3475 | case SERVICE_START: | |
3476 | if (s->type == SERVICE_ONESHOT) { | |
3477 | /* This was our main goal, so let's go on */ | |
3478 | if (f == SERVICE_SUCCESS) | |
3479 | service_enter_start_post(s); | |
3480 | else | |
3481 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3482 | break; | |
3483 | } else if (s->type == SERVICE_NOTIFY) { | |
3484 | /* Only enter running through a notification, so that the | |
3485 | * SERVICE_START state signifies that no ready notification | |
3486 | * has been received */ | |
3487 | if (f != SERVICE_SUCCESS) | |
3488 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3489 | else if (!s->remain_after_exit || s->notify_access == NOTIFY_MAIN) | |
3490 | /* The service has never been and will never be active */ | |
3491 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL); | |
3492 | break; | |
3493 | } | |
3494 | ||
3495 | _fallthrough_; | |
3496 | case SERVICE_RUNNING: | |
3497 | service_enter_running(s, f); | |
3498 | break; | |
3499 | ||
3500 | case SERVICE_STOP_WATCHDOG: | |
3501 | case SERVICE_STOP_SIGTERM: | |
3502 | case SERVICE_STOP_SIGKILL: | |
3503 | ||
3504 | if (control_pid_good(s) <= 0) | |
3505 | service_enter_stop_post(s, f); | |
3506 | ||
3507 | /* If there is still a control process, wait for that first */ | |
3508 | break; | |
3509 | ||
3510 | case SERVICE_STOP_POST: | |
3511 | ||
3512 | if (control_pid_good(s) <= 0) | |
3513 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, f); | |
3514 | ||
3515 | break; | |
3516 | ||
3517 | case SERVICE_FINAL_WATCHDOG: | |
3518 | case SERVICE_FINAL_SIGTERM: | |
3519 | case SERVICE_FINAL_SIGKILL: | |
3520 | ||
3521 | if (control_pid_good(s) <= 0) | |
3522 | service_enter_dead(s, f, true); | |
3523 | break; | |
3524 | ||
3525 | default: | |
3526 | assert_not_reached("Uh, main process died at wrong time."); | |
3527 | } | |
3528 | } | |
3529 | ||
3530 | } else if (s->control_pid == pid) { | |
3531 | const char *kind; | |
3532 | bool success; | |
3533 | ||
3534 | s->control_pid = 0; | |
3535 | ||
3536 | if (s->control_command) { | |
3537 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); | |
3538 | ||
3539 | if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE) | |
3540 | f = SERVICE_SUCCESS; | |
3541 | } | |
3542 | ||
3543 | /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */ | |
3544 | if (s->state == SERVICE_CONDITION) { | |
3545 | if (f == SERVICE_FAILURE_EXIT_CODE && status < 255) { | |
3546 | UNIT(s)->condition_result = false; | |
3547 | f = SERVICE_SKIP_CONDITION; | |
3548 | success = true; | |
3549 | } else if (f == SERVICE_SUCCESS) { | |
3550 | UNIT(s)->condition_result = true; | |
3551 | success = true; | |
3552 | } else | |
3553 | success = false; | |
3554 | ||
3555 | kind = "Condition check process"; | |
3556 | } else { | |
3557 | kind = "Control process"; | |
3558 | success = f == SERVICE_SUCCESS; | |
3559 | } | |
3560 | ||
3561 | unit_log_process_exit( | |
3562 | u, | |
3563 | kind, | |
3564 | service_exec_command_to_string(s->control_command_id), | |
3565 | success, | |
3566 | code, status); | |
3567 | ||
3568 | if (s->state != SERVICE_RELOAD && s->result == SERVICE_SUCCESS) | |
3569 | s->result = f; | |
3570 | ||
3571 | if (s->control_command && | |
3572 | s->control_command->command_next && | |
3573 | f == SERVICE_SUCCESS) { | |
3574 | ||
3575 | /* There is another command to * | |
3576 | * execute, so let's do that. */ | |
3577 | ||
3578 | log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state)); | |
3579 | service_run_next_control(s); | |
3580 | ||
3581 | } else { | |
3582 | /* No further commands for this step, so let's | |
3583 | * figure out what to do next */ | |
3584 | ||
3585 | s->control_command = NULL; | |
3586 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
3587 | ||
3588 | log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state)); | |
3589 | ||
3590 | switch (s->state) { | |
3591 | ||
3592 | case SERVICE_CONDITION: | |
3593 | if (f == SERVICE_SUCCESS) | |
3594 | service_enter_start_pre(s); | |
3595 | else | |
3596 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3597 | break; | |
3598 | ||
3599 | case SERVICE_START_PRE: | |
3600 | if (f == SERVICE_SUCCESS) | |
3601 | service_enter_start(s); | |
3602 | else | |
3603 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3604 | break; | |
3605 | ||
3606 | case SERVICE_START: | |
3607 | if (s->type != SERVICE_FORKING) | |
3608 | /* Maybe spurious event due to a reload that changed the type? */ | |
3609 | break; | |
3610 | ||
3611 | if (f != SERVICE_SUCCESS) { | |
3612 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3613 | break; | |
3614 | } | |
3615 | ||
3616 | if (s->pid_file) { | |
3617 | bool has_start_post; | |
3618 | int r; | |
3619 | ||
3620 | /* Let's try to load the pid file here if we can. | |
3621 | * The PID file might actually be created by a START_POST | |
3622 | * script. In that case don't worry if the loading fails. */ | |
3623 | ||
3624 | has_start_post = s->exec_command[SERVICE_EXEC_START_POST]; | |
3625 | r = service_load_pid_file(s, !has_start_post); | |
3626 | if (!has_start_post && r < 0) { | |
3627 | r = service_demand_pid_file(s); | |
3628 | if (r < 0 || cgroup_good(s) == 0) | |
3629 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL); | |
3630 | break; | |
3631 | } | |
3632 | } else | |
3633 | service_search_main_pid(s); | |
3634 | ||
3635 | service_enter_start_post(s); | |
3636 | break; | |
3637 | ||
3638 | case SERVICE_START_POST: | |
3639 | if (f != SERVICE_SUCCESS) { | |
3640 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3641 | break; | |
3642 | } | |
3643 | ||
3644 | if (s->pid_file) { | |
3645 | int r; | |
3646 | ||
3647 | r = service_load_pid_file(s, true); | |
3648 | if (r < 0) { | |
3649 | r = service_demand_pid_file(s); | |
3650 | if (r < 0 || cgroup_good(s) == 0) | |
3651 | service_enter_stop(s, SERVICE_FAILURE_PROTOCOL); | |
3652 | break; | |
3653 | } | |
3654 | } else | |
3655 | service_search_main_pid(s); | |
3656 | ||
3657 | service_enter_running(s, SERVICE_SUCCESS); | |
3658 | break; | |
3659 | ||
3660 | case SERVICE_RELOAD: | |
3661 | if (f == SERVICE_SUCCESS) | |
3662 | if (service_load_pid_file(s, true) < 0) | |
3663 | service_search_main_pid(s); | |
3664 | ||
3665 | s->reload_result = f; | |
3666 | service_enter_running(s, SERVICE_SUCCESS); | |
3667 | break; | |
3668 | ||
3669 | case SERVICE_STOP: | |
3670 | service_enter_signal(s, SERVICE_STOP_SIGTERM, f); | |
3671 | break; | |
3672 | ||
3673 | case SERVICE_STOP_WATCHDOG: | |
3674 | case SERVICE_STOP_SIGTERM: | |
3675 | case SERVICE_STOP_SIGKILL: | |
3676 | if (main_pid_good(s) <= 0) | |
3677 | service_enter_stop_post(s, f); | |
3678 | ||
3679 | /* If there is still a service process around, wait until | |
3680 | * that one quit, too */ | |
3681 | break; | |
3682 | ||
3683 | case SERVICE_STOP_POST: | |
3684 | if (main_pid_good(s) <= 0) | |
3685 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, f); | |
3686 | break; | |
3687 | ||
3688 | case SERVICE_FINAL_WATCHDOG: | |
3689 | case SERVICE_FINAL_SIGTERM: | |
3690 | case SERVICE_FINAL_SIGKILL: | |
3691 | if (main_pid_good(s) <= 0) | |
3692 | service_enter_dead(s, f, true); | |
3693 | break; | |
3694 | ||
3695 | case SERVICE_CLEANING: | |
3696 | ||
3697 | if (s->clean_result == SERVICE_SUCCESS) | |
3698 | s->clean_result = f; | |
3699 | ||
3700 | service_enter_dead(s, SERVICE_SUCCESS, false); | |
3701 | break; | |
3702 | ||
3703 | default: | |
3704 | assert_not_reached("Uh, control process died at wrong time."); | |
3705 | } | |
3706 | } | |
3707 | } else /* Neither control nor main PID? If so, don't notify about anything */ | |
3708 | notify_dbus = false; | |
3709 | ||
3710 | /* Notify clients about changed exit status */ | |
3711 | if (notify_dbus) | |
3712 | unit_add_to_dbus_queue(u); | |
3713 | ||
3714 | /* We watch the main/control process otherwise we can't retrieve the unit they | |
3715 | * belong to with cgroupv1. But if they are not our direct child, we won't get a | |
3716 | * SIGCHLD for them. Therefore we need to look for others to watch so we can | |
3717 | * detect when the cgroup becomes empty. Note that the control process is always | |
3718 | * our child so it's pointless to watch all other processes. */ | |
3719 | if (!control_pid_good(s)) | |
3720 | if (!s->main_pid_known || s->main_pid_alien) | |
3721 | (void) unit_enqueue_rewatch_pids(u); | |
3722 | } | |
3723 | ||
3724 | static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { | |
3725 | Service *s = SERVICE(userdata); | |
3726 | ||
3727 | assert(s); | |
3728 | assert(source == s->timer_event_source); | |
3729 | ||
3730 | switch (s->state) { | |
3731 | ||
3732 | case SERVICE_CONDITION: | |
3733 | case SERVICE_START_PRE: | |
3734 | case SERVICE_START: | |
3735 | case SERVICE_START_POST: | |
3736 | switch (s->timeout_start_failure_mode) { | |
3737 | ||
3738 | case SERVICE_TIMEOUT_TERMINATE: | |
3739 | log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", service_state_to_string(s->state)); | |
3740 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
3741 | break; | |
3742 | ||
3743 | case SERVICE_TIMEOUT_ABORT: | |
3744 | log_unit_warning(UNIT(s), "%s operation timed out. Aborting.", service_state_to_string(s->state)); | |
3745 | service_enter_signal(s, SERVICE_STOP_WATCHDOG, SERVICE_FAILURE_TIMEOUT); | |
3746 | break; | |
3747 | ||
3748 | case SERVICE_TIMEOUT_KILL: | |
3749 | if (s->kill_context.send_sigkill) { | |
3750 | log_unit_warning(UNIT(s), "%s operation timed out. Killing.", service_state_to_string(s->state)); | |
3751 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3752 | } else { | |
3753 | log_unit_warning(UNIT(s), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s->state)); | |
3754 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
3755 | } | |
3756 | break; | |
3757 | ||
3758 | default: | |
3759 | assert_not_reached("unknown timeout mode"); | |
3760 | } | |
3761 | break; | |
3762 | ||
3763 | case SERVICE_RUNNING: | |
3764 | log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping."); | |
3765 | service_enter_stop(s, SERVICE_FAILURE_TIMEOUT); | |
3766 | break; | |
3767 | ||
3768 | case SERVICE_RELOAD: | |
3769 | log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process."); | |
3770 | service_kill_control_process(s); | |
3771 | s->reload_result = SERVICE_FAILURE_TIMEOUT; | |
3772 | service_enter_running(s, SERVICE_SUCCESS); | |
3773 | break; | |
3774 | ||
3775 | case SERVICE_STOP: | |
3776 | switch (s->timeout_stop_failure_mode) { | |
3777 | ||
3778 | case SERVICE_TIMEOUT_TERMINATE: | |
3779 | log_unit_warning(UNIT(s), "Stopping timed out. Terminating."); | |
3780 | service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
3781 | break; | |
3782 | ||
3783 | case SERVICE_TIMEOUT_ABORT: | |
3784 | log_unit_warning(UNIT(s), "Stopping timed out. Aborting."); | |
3785 | service_enter_signal(s, SERVICE_STOP_WATCHDOG, SERVICE_FAILURE_TIMEOUT); | |
3786 | break; | |
3787 | ||
3788 | case SERVICE_TIMEOUT_KILL: | |
3789 | if (s->kill_context.send_sigkill) { | |
3790 | log_unit_warning(UNIT(s), "Stopping timed out. Killing."); | |
3791 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3792 | } else { | |
3793 | log_unit_warning(UNIT(s), "Stopping timed out. Skipping SIGKILL."); | |
3794 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
3795 | } | |
3796 | break; | |
3797 | ||
3798 | default: | |
3799 | assert_not_reached("unknown timeout mode"); | |
3800 | } | |
3801 | break; | |
3802 | ||
3803 | case SERVICE_STOP_WATCHDOG: | |
3804 | if (s->kill_context.send_sigkill) { | |
3805 | log_unit_warning(UNIT(s), "State 'stop-watchdog' timed out. Killing."); | |
3806 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3807 | } else { | |
3808 | log_unit_warning(UNIT(s), "State 'stop-watchdog' timed out. Skipping SIGKILL."); | |
3809 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
3810 | } | |
3811 | break; | |
3812 | ||
3813 | case SERVICE_STOP_SIGTERM: | |
3814 | if (s->timeout_stop_failure_mode == SERVICE_TIMEOUT_ABORT) { | |
3815 | log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Aborting."); | |
3816 | service_enter_signal(s, SERVICE_STOP_WATCHDOG, SERVICE_FAILURE_TIMEOUT); | |
3817 | } else if (s->kill_context.send_sigkill) { | |
3818 | log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing."); | |
3819 | service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3820 | } else { | |
3821 | log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL."); | |
3822 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
3823 | } | |
3824 | ||
3825 | break; | |
3826 | ||
3827 | case SERVICE_STOP_SIGKILL: | |
3828 | /* Uh, we sent a SIGKILL and it is still not gone? | |
3829 | * Must be something we cannot kill, so let's just be | |
3830 | * weirded out and continue */ | |
3831 | ||
3832 | log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring."); | |
3833 | service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT); | |
3834 | break; | |
3835 | ||
3836 | case SERVICE_STOP_POST: | |
3837 | switch (s->timeout_stop_failure_mode) { | |
3838 | ||
3839 | case SERVICE_TIMEOUT_TERMINATE: | |
3840 | log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating."); | |
3841 | service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT); | |
3842 | break; | |
3843 | ||
3844 | case SERVICE_TIMEOUT_ABORT: | |
3845 | log_unit_warning(UNIT(s), "State 'stop-post' timed out. Aborting."); | |
3846 | service_enter_signal(s, SERVICE_FINAL_WATCHDOG, SERVICE_FAILURE_TIMEOUT); | |
3847 | break; | |
3848 | ||
3849 | case SERVICE_TIMEOUT_KILL: | |
3850 | if (s->kill_context.send_sigkill) { | |
3851 | log_unit_warning(UNIT(s), "State 'stop-post' timed out. Killing."); | |
3852 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3853 | } else { | |
3854 | log_unit_warning(UNIT(s), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode."); | |
3855 | service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false); | |
3856 | } | |
3857 | break; | |
3858 | ||
3859 | default: | |
3860 | assert_not_reached("unknown timeout mode"); | |
3861 | } | |
3862 | break; | |
3863 | ||
3864 | case SERVICE_FINAL_WATCHDOG: | |
3865 | if (s->kill_context.send_sigkill) { | |
3866 | log_unit_warning(UNIT(s), "State 'final-watchdog' timed out. Killing."); | |
3867 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3868 | } else { | |
3869 | log_unit_warning(UNIT(s), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode."); | |
3870 | service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false); | |
3871 | } | |
3872 | break; | |
3873 | ||
3874 | case SERVICE_FINAL_SIGTERM: | |
3875 | if (s->timeout_stop_failure_mode == SERVICE_TIMEOUT_ABORT) { | |
3876 | log_unit_warning(UNIT(s), "State 'final-sigterm' timed out. Aborting."); | |
3877 | service_enter_signal(s, SERVICE_FINAL_WATCHDOG, SERVICE_FAILURE_TIMEOUT); | |
3878 | } else if (s->kill_context.send_sigkill) { | |
3879 | log_unit_warning(UNIT(s), "State 'final-sigterm' timed out. Killing."); | |
3880 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT); | |
3881 | } else { | |
3882 | log_unit_warning(UNIT(s), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode."); | |
3883 | service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false); | |
3884 | } | |
3885 | ||
3886 | break; | |
3887 | ||
3888 | case SERVICE_FINAL_SIGKILL: | |
3889 | log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode."); | |
3890 | service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true); | |
3891 | break; | |
3892 | ||
3893 | case SERVICE_AUTO_RESTART: | |
3894 | if (s->restart_usec > 0) | |
3895 | log_unit_debug(UNIT(s), | |
3896 | "Service RestartSec=%s expired, scheduling restart.", | |
3897 | FORMAT_TIMESPAN(s->restart_usec, USEC_PER_SEC)); | |
3898 | else | |
3899 | log_unit_debug(UNIT(s), | |
3900 | "Service has no hold-off time (RestartSec=0), scheduling restart."); | |
3901 | ||
3902 | service_enter_restart(s); | |
3903 | break; | |
3904 | ||
3905 | case SERVICE_CLEANING: | |
3906 | log_unit_warning(UNIT(s), "Cleaning timed out. killing."); | |
3907 | ||
3908 | if (s->clean_result == SERVICE_SUCCESS) | |
3909 | s->clean_result = SERVICE_FAILURE_TIMEOUT; | |
3910 | ||
3911 | service_enter_signal(s, SERVICE_FINAL_SIGKILL, 0); | |
3912 | break; | |
3913 | ||
3914 | default: | |
3915 | assert_not_reached("Timeout at wrong time."); | |
3916 | } | |
3917 | ||
3918 | return 0; | |
3919 | } | |
3920 | ||
3921 | static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) { | |
3922 | Service *s = SERVICE(userdata); | |
3923 | usec_t watchdog_usec; | |
3924 | ||
3925 | assert(s); | |
3926 | assert(source == s->watchdog_event_source); | |
3927 | ||
3928 | watchdog_usec = service_get_watchdog_usec(s); | |
3929 | ||
3930 | if (UNIT(s)->manager->service_watchdogs) { | |
3931 | log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!", | |
3932 | FORMAT_TIMESPAN(watchdog_usec, 1)); | |
3933 | ||
3934 | service_enter_signal(s, SERVICE_STOP_WATCHDOG, SERVICE_FAILURE_WATCHDOG); | |
3935 | } else | |
3936 | log_unit_warning(UNIT(s), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!", | |
3937 | FORMAT_TIMESPAN(watchdog_usec, 1)); | |
3938 | ||
3939 | return 0; | |
3940 | } | |
3941 | ||
3942 | static bool service_notify_message_authorized(Service *s, pid_t pid, FDSet *fds) { | |
3943 | assert(s); | |
3944 | ||
3945 | if (s->notify_access == NOTIFY_NONE) { | |
3946 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception is disabled.", pid); | |
3947 | return false; | |
3948 | } | |
3949 | ||
3950 | if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) { | |
3951 | if (s->main_pid != 0) | |
3952 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid); | |
3953 | else | |
3954 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid); | |
3955 | ||
3956 | return false; | |
3957 | } | |
3958 | ||
3959 | if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) { | |
3960 | if (s->main_pid != 0 && s->control_pid != 0) | |
3961 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT" and control PID "PID_FMT, | |
3962 | pid, s->main_pid, s->control_pid); | |
3963 | else if (s->main_pid != 0) | |
3964 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid); | |
3965 | else if (s->control_pid != 0) | |
3966 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid); | |
3967 | else | |
3968 | log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID and control PID which are currently not known", pid); | |
3969 | ||
3970 | return false; | |
3971 | } | |
3972 | ||
3973 | return true; | |
3974 | } | |
3975 | ||
3976 | static void service_force_watchdog(Service *s) { | |
3977 | if (!UNIT(s)->manager->service_watchdogs) | |
3978 | return; | |
3979 | ||
3980 | log_unit_error(UNIT(s), "Watchdog request (last status: %s)!", | |
3981 | s->status_text ? s->status_text : "<unset>"); | |
3982 | ||
3983 | service_enter_signal(s, SERVICE_STOP_WATCHDOG, SERVICE_FAILURE_WATCHDOG); | |
3984 | } | |
3985 | ||
3986 | static void service_notify_message( | |
3987 | Unit *u, | |
3988 | const struct ucred *ucred, | |
3989 | char * const *tags, | |
3990 | FDSet *fds) { | |
3991 | ||
3992 | Service *s = SERVICE(u); | |
3993 | bool notify_dbus = false; | |
3994 | const char *e; | |
3995 | char * const *i; | |
3996 | int r; | |
3997 | ||
3998 | assert(u); | |
3999 | assert(ucred); | |
4000 | ||
4001 | if (!service_notify_message_authorized(SERVICE(u), ucred->pid, fds)) | |
4002 | return; | |
4003 | ||
4004 | if (DEBUG_LOGGING) { | |
4005 | _cleanup_free_ char *cc = NULL; | |
4006 | ||
4007 | cc = strv_join(tags, ", "); | |
4008 | log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", ucred->pid, isempty(cc) ? "n/a" : cc); | |
4009 | } | |
4010 | ||
4011 | /* Interpret MAINPID= */ | |
4012 | e = strv_find_startswith(tags, "MAINPID="); | |
4013 | if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) { | |
4014 | pid_t new_main_pid; | |
4015 | ||
4016 | if (parse_pid(e, &new_main_pid) < 0) | |
4017 | log_unit_warning(u, "Failed to parse MAINPID= field in notification message, ignoring: %s", e); | |
4018 | else if (!s->main_pid_known || new_main_pid != s->main_pid) { | |
4019 | ||
4020 | r = service_is_suitable_main_pid(s, new_main_pid, LOG_WARNING); | |
4021 | if (r == 0) { | |
4022 | /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */ | |
4023 | ||
4024 | if (ucred->uid == 0) { | |
4025 | log_unit_debug(u, "New main PID "PID_FMT" does not belong to service, but we'll accept it as the request to change it came from a privileged process.", new_main_pid); | |
4026 | r = 1; | |
4027 | } else | |
4028 | log_unit_debug(u, "New main PID "PID_FMT" does not belong to service, refusing.", new_main_pid); | |
4029 | } | |
4030 | if (r > 0) { | |
4031 | service_set_main_pid(s, new_main_pid); | |
4032 | ||
4033 | r = unit_watch_pid(UNIT(s), new_main_pid, false); | |
4034 | if (r < 0) | |
4035 | log_unit_warning_errno(UNIT(s), r, "Failed to watch new main PID "PID_FMT" for service: %m", new_main_pid); | |
4036 | ||
4037 | notify_dbus = true; | |
4038 | } | |
4039 | } | |
4040 | } | |
4041 | ||
4042 | /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */ | |
4043 | STRV_FOREACH_BACKWARDS(i, tags) { | |
4044 | ||
4045 | if (streq(*i, "READY=1")) { | |
4046 | s->notify_state = NOTIFY_READY; | |
4047 | ||
4048 | /* Type=notify services inform us about completed | |
4049 | * initialization with READY=1 */ | |
4050 | if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START) | |
4051 | service_enter_start_post(s); | |
4052 | ||
4053 | /* Sending READY=1 while we are reloading informs us | |
4054 | * that the reloading is complete */ | |
4055 | if (s->state == SERVICE_RELOAD && s->control_pid == 0) | |
4056 | service_enter_running(s, SERVICE_SUCCESS); | |
4057 | ||
4058 | notify_dbus = true; | |
4059 | break; | |
4060 | ||
4061 | } else if (streq(*i, "RELOADING=1")) { | |
4062 | s->notify_state = NOTIFY_RELOADING; | |
4063 | ||
4064 | if (s->state == SERVICE_RUNNING) | |
4065 | service_enter_reload_by_notify(s); | |
4066 | ||
4067 | notify_dbus = true; | |
4068 | break; | |
4069 | ||
4070 | } else if (streq(*i, "STOPPING=1")) { | |
4071 | s->notify_state = NOTIFY_STOPPING; | |
4072 | ||
4073 | if (s->state == SERVICE_RUNNING) | |
4074 | service_enter_stop_by_notify(s); | |
4075 | ||
4076 | notify_dbus = true; | |
4077 | break; | |
4078 | } | |
4079 | } | |
4080 | ||
4081 | /* Interpret STATUS= */ | |
4082 | e = strv_find_startswith(tags, "STATUS="); | |
4083 | if (e) { | |
4084 | _cleanup_free_ char *t = NULL; | |
4085 | ||
4086 | if (!isempty(e)) { | |
4087 | /* Note that this size limit check is mostly paranoia: since the datagram size we are willing | |
4088 | * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */ | |
4089 | if (strlen(e) > STATUS_TEXT_MAX) | |
4090 | log_unit_warning(u, "Status message overly long (%zu > %u), ignoring.", strlen(e), STATUS_TEXT_MAX); | |
4091 | else if (!utf8_is_valid(e)) | |
4092 | log_unit_warning(u, "Status message in notification message is not UTF-8 clean, ignoring."); | |
4093 | else { | |
4094 | t = strdup(e); | |
4095 | if (!t) | |
4096 | log_oom(); | |
4097 | } | |
4098 | } | |
4099 | ||
4100 | if (!streq_ptr(s->status_text, t)) { | |
4101 | free_and_replace(s->status_text, t); | |
4102 | notify_dbus = true; | |
4103 | } | |
4104 | } | |
4105 | ||
4106 | /* Interpret ERRNO= */ | |
4107 | e = strv_find_startswith(tags, "ERRNO="); | |
4108 | if (e) { | |
4109 | int status_errno; | |
4110 | ||
4111 | status_errno = parse_errno(e); | |
4112 | if (status_errno < 0) | |
4113 | log_unit_warning_errno(u, status_errno, | |
4114 | "Failed to parse ERRNO= field value '%s' in notification message: %m", e); | |
4115 | else if (s->status_errno != status_errno) { | |
4116 | s->status_errno = status_errno; | |
4117 | notify_dbus = true; | |
4118 | } | |
4119 | } | |
4120 | ||
4121 | /* Interpret EXTEND_TIMEOUT= */ | |
4122 | e = strv_find_startswith(tags, "EXTEND_TIMEOUT_USEC="); | |
4123 | if (e) { | |
4124 | usec_t extend_timeout_usec; | |
4125 | if (safe_atou64(e, &extend_timeout_usec) < 0) | |
4126 | log_unit_warning(u, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e); | |
4127 | else | |
4128 | service_extend_timeout(s, extend_timeout_usec); | |
4129 | } | |
4130 | ||
4131 | /* Interpret WATCHDOG= */ | |
4132 | e = strv_find_startswith(tags, "WATCHDOG="); | |
4133 | if (e) { | |
4134 | if (streq(e, "1")) | |
4135 | service_reset_watchdog(s); | |
4136 | else if (streq(e, "trigger")) | |
4137 | service_force_watchdog(s); | |
4138 | else | |
4139 | log_unit_warning(u, "Passed WATCHDOG= field is invalid, ignoring."); | |
4140 | } | |
4141 | ||
4142 | e = strv_find_startswith(tags, "WATCHDOG_USEC="); | |
4143 | if (e) { | |
4144 | usec_t watchdog_override_usec; | |
4145 | if (safe_atou64(e, &watchdog_override_usec) < 0) | |
4146 | log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e); | |
4147 | else | |
4148 | service_override_watchdog_timeout(s, watchdog_override_usec); | |
4149 | } | |
4150 | ||
4151 | /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases, | |
4152 | * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing | |
4153 | * fds, but optional when pushing in new fds, for compatibility reasons. */ | |
4154 | if (strv_find(tags, "FDSTOREREMOVE=1")) { | |
4155 | const char *name; | |
4156 | ||
4157 | name = strv_find_startswith(tags, "FDNAME="); | |
4158 | if (!name || !fdname_is_valid(name)) | |
4159 | log_unit_warning(u, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring."); | |
4160 | else | |
4161 | service_remove_fd_store(s, name); | |
4162 | ||
4163 | } else if (strv_find(tags, "FDSTORE=1")) { | |
4164 | const char *name; | |
4165 | ||
4166 | name = strv_find_startswith(tags, "FDNAME="); | |
4167 | if (name && !fdname_is_valid(name)) { | |
4168 | log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring."); | |
4169 | name = NULL; | |
4170 | } | |
4171 | ||
4172 | (void) service_add_fd_store_set(s, fds, name, !strv_contains(tags, "FDPOLL=0")); | |
4173 | } | |
4174 | ||
4175 | /* Notify clients about changed status or main pid */ | |
4176 | if (notify_dbus) | |
4177 | unit_add_to_dbus_queue(u); | |
4178 | } | |
4179 | ||
4180 | static int service_get_timeout(Unit *u, usec_t *timeout) { | |
4181 | Service *s = SERVICE(u); | |
4182 | uint64_t t; | |
4183 | int r; | |
4184 | ||
4185 | if (!s->timer_event_source) | |
4186 | return 0; | |
4187 | ||
4188 | r = sd_event_source_get_time(s->timer_event_source, &t); | |
4189 | if (r < 0) | |
4190 | return r; | |
4191 | if (t == USEC_INFINITY) | |
4192 | return 0; | |
4193 | ||
4194 | *timeout = t; | |
4195 | return 1; | |
4196 | } | |
4197 | ||
4198 | static void service_bus_name_owner_change(Unit *u, const char *new_owner) { | |
4199 | ||
4200 | Service *s = SERVICE(u); | |
4201 | int r; | |
4202 | ||
4203 | assert(s); | |
4204 | ||
4205 | if (new_owner) | |
4206 | log_unit_debug(u, "D-Bus name %s now owned by %s", s->bus_name, new_owner); | |
4207 | else | |
4208 | log_unit_debug(u, "D-Bus name %s now not owned by anyone.", s->bus_name); | |
4209 | ||
4210 | s->bus_name_good = new_owner; | |
4211 | ||
4212 | /* Track the current owner, so we can reconstruct changes after a daemon reload */ | |
4213 | r = free_and_strdup(&s->bus_name_owner, new_owner); | |
4214 | if (r < 0) { | |
4215 | log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner); | |
4216 | return; | |
4217 | } | |
4218 | ||
4219 | if (s->type == SERVICE_DBUS) { | |
4220 | ||
4221 | /* service_enter_running() will figure out what to | |
4222 | * do */ | |
4223 | if (s->state == SERVICE_RUNNING) | |
4224 | service_enter_running(s, SERVICE_SUCCESS); | |
4225 | else if (s->state == SERVICE_START && new_owner) | |
4226 | service_enter_start_post(s); | |
4227 | ||
4228 | } else if (new_owner && | |
4229 | s->main_pid <= 0 && | |
4230 | IN_SET(s->state, | |
4231 | SERVICE_START, | |
4232 | SERVICE_START_POST, | |
4233 | SERVICE_RUNNING, | |
4234 | SERVICE_RELOAD)) { | |
4235 | ||
4236 | _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; | |
4237 | pid_t pid; | |
4238 | ||
4239 | /* Try to acquire PID from bus service */ | |
4240 | ||
4241 | r = sd_bus_get_name_creds(u->manager->api_bus, s->bus_name, SD_BUS_CREDS_PID, &creds); | |
4242 | if (r >= 0) | |
4243 | r = sd_bus_creds_get_pid(creds, &pid); | |
4244 | if (r >= 0) { | |
4245 | log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, s->bus_name, pid); | |
4246 | ||
4247 | service_set_main_pid(s, pid); | |
4248 | unit_watch_pid(UNIT(s), pid, false); | |
4249 | } | |
4250 | } | |
4251 | } | |
4252 | ||
4253 | int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) { | |
4254 | _cleanup_free_ char *peer = NULL; | |
4255 | int r; | |
4256 | ||
4257 | assert(s); | |
4258 | assert(fd >= 0); | |
4259 | ||
4260 | /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs | |
4261 | * to be configured. We take ownership of the passed fd on success. */ | |
4262 | ||
4263 | if (UNIT(s)->load_state != UNIT_LOADED) | |
4264 | return -EINVAL; | |
4265 | ||
4266 | if (s->socket_fd >= 0) | |
4267 | return -EBUSY; | |
4268 | ||
4269 | if (s->state != SERVICE_DEAD) | |
4270 | return -EAGAIN; | |
4271 | ||
4272 | if (getpeername_pretty(fd, true, &peer) >= 0) { | |
4273 | ||
4274 | if (UNIT(s)->description) { | |
4275 | _cleanup_free_ char *a = NULL; | |
4276 | ||
4277 | a = strjoin(UNIT(s)->description, " (", peer, ")"); | |
4278 | if (!a) | |
4279 | return -ENOMEM; | |
4280 | ||
4281 | r = unit_set_description(UNIT(s), a); | |
4282 | } else | |
4283 | r = unit_set_description(UNIT(s), peer); | |
4284 | ||
4285 | if (r < 0) | |
4286 | return r; | |
4287 | } | |
4288 | ||
4289 | r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false, UNIT_DEPENDENCY_IMPLICIT); | |
4290 | if (r < 0) | |
4291 | return r; | |
4292 | ||
4293 | s->socket_fd = fd; | |
4294 | s->socket_fd_selinux_context_net = selinux_context_net; | |
4295 | ||
4296 | unit_ref_set(&s->accept_socket, UNIT(s), UNIT(sock)); | |
4297 | return 0; | |
4298 | } | |
4299 | ||
4300 | static void service_reset_failed(Unit *u) { | |
4301 | Service *s = SERVICE(u); | |
4302 | ||
4303 | assert(s); | |
4304 | ||
4305 | if (s->state == SERVICE_FAILED) | |
4306 | service_set_state(s, SERVICE_DEAD); | |
4307 | ||
4308 | s->result = SERVICE_SUCCESS; | |
4309 | s->reload_result = SERVICE_SUCCESS; | |
4310 | s->clean_result = SERVICE_SUCCESS; | |
4311 | s->n_restarts = 0; | |
4312 | s->flush_n_restarts = false; | |
4313 | } | |
4314 | ||
4315 | static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { | |
4316 | Service *s = SERVICE(u); | |
4317 | ||
4318 | assert(s); | |
4319 | ||
4320 | return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error); | |
4321 | } | |
4322 | ||
4323 | static int service_main_pid(Unit *u) { | |
4324 | Service *s = SERVICE(u); | |
4325 | ||
4326 | assert(s); | |
4327 | ||
4328 | return s->main_pid; | |
4329 | } | |
4330 | ||
4331 | static int service_control_pid(Unit *u) { | |
4332 | Service *s = SERVICE(u); | |
4333 | ||
4334 | assert(s); | |
4335 | ||
4336 | return s->control_pid; | |
4337 | } | |
4338 | ||
4339 | static bool service_needs_console(Unit *u) { | |
4340 | Service *s = SERVICE(u); | |
4341 | ||
4342 | assert(s); | |
4343 | ||
4344 | /* We provide our own implementation of this here, instead of relying of the generic implementation | |
4345 | * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */ | |
4346 | ||
4347 | if (!exec_context_may_touch_console(&s->exec_context)) | |
4348 | return false; | |
4349 | ||
4350 | return IN_SET(s->state, | |
4351 | SERVICE_CONDITION, | |
4352 | SERVICE_START_PRE, | |
4353 | SERVICE_START, | |
4354 | SERVICE_START_POST, | |
4355 | SERVICE_RUNNING, | |
4356 | SERVICE_RELOAD, | |
4357 | SERVICE_STOP, | |
4358 | SERVICE_STOP_WATCHDOG, | |
4359 | SERVICE_STOP_SIGTERM, | |
4360 | SERVICE_STOP_SIGKILL, | |
4361 | SERVICE_STOP_POST, | |
4362 | SERVICE_FINAL_WATCHDOG, | |
4363 | SERVICE_FINAL_SIGTERM, | |
4364 | SERVICE_FINAL_SIGKILL); | |
4365 | } | |
4366 | ||
4367 | static int service_exit_status(Unit *u) { | |
4368 | Service *s = SERVICE(u); | |
4369 | ||
4370 | assert(u); | |
4371 | ||
4372 | if (s->main_exec_status.pid <= 0 || | |
4373 | !dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) | |
4374 | return -ENODATA; | |
4375 | ||
4376 | if (s->main_exec_status.code != CLD_EXITED) | |
4377 | return -EBADE; | |
4378 | ||
4379 | return s->main_exec_status.status; | |
4380 | } | |
4381 | ||
4382 | static int service_clean(Unit *u, ExecCleanMask mask) { | |
4383 | _cleanup_strv_free_ char **l = NULL; | |
4384 | Service *s = SERVICE(u); | |
4385 | int r; | |
4386 | ||
4387 | assert(s); | |
4388 | assert(mask != 0); | |
4389 | ||
4390 | if (s->state != SERVICE_DEAD) | |
4391 | return -EBUSY; | |
4392 | ||
4393 | r = exec_context_get_clean_directories(&s->exec_context, u->manager->prefix, mask, &l); | |
4394 | if (r < 0) | |
4395 | return r; | |
4396 | ||
4397 | if (strv_isempty(l)) | |
4398 | return -EUNATCH; | |
4399 | ||
4400 | service_unwatch_control_pid(s); | |
4401 | s->clean_result = SERVICE_SUCCESS; | |
4402 | s->control_command = NULL; | |
4403 | s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID; | |
4404 | ||
4405 | r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->exec_context.timeout_clean_usec)); | |
4406 | if (r < 0) | |
4407 | goto fail; | |
4408 | ||
4409 | r = unit_fork_and_watch_rm_rf(u, l, &s->control_pid); | |
4410 | if (r < 0) | |
4411 | goto fail; | |
4412 | ||
4413 | service_set_state(s, SERVICE_CLEANING); | |
4414 | ||
4415 | return 0; | |
4416 | ||
4417 | fail: | |
4418 | log_unit_warning_errno(u, r, "Failed to initiate cleaning: %m"); | |
4419 | s->clean_result = SERVICE_FAILURE_RESOURCES; | |
4420 | s->timer_event_source = sd_event_source_disable_unref(s->timer_event_source); | |
4421 | return r; | |
4422 | } | |
4423 | ||
4424 | static int service_can_clean(Unit *u, ExecCleanMask *ret) { | |
4425 | Service *s = SERVICE(u); | |
4426 | ||
4427 | assert(s); | |
4428 | ||
4429 | return exec_context_get_clean_mask(&s->exec_context, ret); | |
4430 | } | |
4431 | ||
4432 | static const char *service_finished_job(Unit *u, JobType t, JobResult result) { | |
4433 | if (t == JOB_START && | |
4434 | result == JOB_DONE && | |
4435 | SERVICE(u)->type == SERVICE_ONESHOT) | |
4436 | return "Finished %s."; | |
4437 | ||
4438 | /* Fall back to generic */ | |
4439 | return NULL; | |
4440 | } | |
4441 | ||
4442 | static const char* const service_restart_table[_SERVICE_RESTART_MAX] = { | |
4443 | [SERVICE_RESTART_NO] = "no", | |
4444 | [SERVICE_RESTART_ON_SUCCESS] = "on-success", | |
4445 | [SERVICE_RESTART_ON_FAILURE] = "on-failure", | |
4446 | [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal", | |
4447 | [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog", | |
4448 | [SERVICE_RESTART_ON_ABORT] = "on-abort", | |
4449 | [SERVICE_RESTART_ALWAYS] = "always", | |
4450 | }; | |
4451 | ||
4452 | DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart); | |
4453 | ||
4454 | static const char* const service_type_table[_SERVICE_TYPE_MAX] = { | |
4455 | [SERVICE_SIMPLE] = "simple", | |
4456 | [SERVICE_FORKING] = "forking", | |
4457 | [SERVICE_ONESHOT] = "oneshot", | |
4458 | [SERVICE_DBUS] = "dbus", | |
4459 | [SERVICE_NOTIFY] = "notify", | |
4460 | [SERVICE_IDLE] = "idle", | |
4461 | [SERVICE_EXEC] = "exec", | |
4462 | }; | |
4463 | ||
4464 | DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType); | |
4465 | ||
4466 | static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = { | |
4467 | [SERVICE_EXEC_CONDITION] = "ExecCondition", | |
4468 | [SERVICE_EXEC_START_PRE] = "ExecStartPre", | |
4469 | [SERVICE_EXEC_START] = "ExecStart", | |
4470 | [SERVICE_EXEC_START_POST] = "ExecStartPost", | |
4471 | [SERVICE_EXEC_RELOAD] = "ExecReload", | |
4472 | [SERVICE_EXEC_STOP] = "ExecStop", | |
4473 | [SERVICE_EXEC_STOP_POST] = "ExecStopPost", | |
4474 | }; | |
4475 | ||
4476 | DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand); | |
4477 | ||
4478 | static const char* const service_exec_ex_command_table[_SERVICE_EXEC_COMMAND_MAX] = { | |
4479 | [SERVICE_EXEC_CONDITION] = "ExecConditionEx", | |
4480 | [SERVICE_EXEC_START_PRE] = "ExecStartPreEx", | |
4481 | [SERVICE_EXEC_START] = "ExecStartEx", | |
4482 | [SERVICE_EXEC_START_POST] = "ExecStartPostEx", | |
4483 | [SERVICE_EXEC_RELOAD] = "ExecReloadEx", | |
4484 | [SERVICE_EXEC_STOP] = "ExecStopEx", | |
4485 | [SERVICE_EXEC_STOP_POST] = "ExecStopPostEx", | |
4486 | }; | |
4487 | ||
4488 | DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command, ServiceExecCommand); | |
4489 | ||
4490 | static const char* const notify_state_table[_NOTIFY_STATE_MAX] = { | |
4491 | [NOTIFY_UNKNOWN] = "unknown", | |
4492 | [NOTIFY_READY] = "ready", | |
4493 | [NOTIFY_RELOADING] = "reloading", | |
4494 | [NOTIFY_STOPPING] = "stopping", | |
4495 | }; | |
4496 | ||
4497 | DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState); | |
4498 | ||
4499 | static const char* const service_result_table[_SERVICE_RESULT_MAX] = { | |
4500 | [SERVICE_SUCCESS] = "success", | |
4501 | [SERVICE_FAILURE_RESOURCES] = "resources", | |
4502 | [SERVICE_FAILURE_PROTOCOL] = "protocol", | |
4503 | [SERVICE_FAILURE_TIMEOUT] = "timeout", | |
4504 | [SERVICE_FAILURE_EXIT_CODE] = "exit-code", | |
4505 | [SERVICE_FAILURE_SIGNAL] = "signal", | |
4506 | [SERVICE_FAILURE_CORE_DUMP] = "core-dump", | |
4507 | [SERVICE_FAILURE_WATCHDOG] = "watchdog", | |
4508 | [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit", | |
4509 | [SERVICE_FAILURE_OOM_KILL] = "oom-kill", | |
4510 | [SERVICE_SKIP_CONDITION] = "exec-condition", | |
4511 | }; | |
4512 | ||
4513 | DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult); | |
4514 | ||
4515 | static const char* const service_timeout_failure_mode_table[_SERVICE_TIMEOUT_FAILURE_MODE_MAX] = { | |
4516 | [SERVICE_TIMEOUT_TERMINATE] = "terminate", | |
4517 | [SERVICE_TIMEOUT_ABORT] = "abort", | |
4518 | [SERVICE_TIMEOUT_KILL] = "kill", | |
4519 | }; | |
4520 | ||
4521 | DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode, ServiceTimeoutFailureMode); | |
4522 | ||
4523 | const UnitVTable service_vtable = { | |
4524 | .object_size = sizeof(Service), | |
4525 | .exec_context_offset = offsetof(Service, exec_context), | |
4526 | .cgroup_context_offset = offsetof(Service, cgroup_context), | |
4527 | .kill_context_offset = offsetof(Service, kill_context), | |
4528 | .exec_runtime_offset = offsetof(Service, exec_runtime), | |
4529 | .dynamic_creds_offset = offsetof(Service, dynamic_creds), | |
4530 | ||
4531 | .sections = | |
4532 | "Unit\0" | |
4533 | "Service\0" | |
4534 | "Install\0", | |
4535 | .private_section = "Service", | |
4536 | ||
4537 | .can_transient = true, | |
4538 | .can_delegate = true, | |
4539 | .can_fail = true, | |
4540 | .can_set_managed_oom = true, | |
4541 | ||
4542 | .init = service_init, | |
4543 | .done = service_done, | |
4544 | .load = service_load, | |
4545 | .release_resources = service_release_resources, | |
4546 | ||
4547 | .coldplug = service_coldplug, | |
4548 | ||
4549 | .dump = service_dump, | |
4550 | ||
4551 | .start = service_start, | |
4552 | .stop = service_stop, | |
4553 | .reload = service_reload, | |
4554 | ||
4555 | .can_reload = service_can_reload, | |
4556 | ||
4557 | .kill = service_kill, | |
4558 | .clean = service_clean, | |
4559 | .can_clean = service_can_clean, | |
4560 | ||
4561 | .freeze = unit_freeze_vtable_common, | |
4562 | .thaw = unit_thaw_vtable_common, | |
4563 | ||
4564 | .serialize = service_serialize, | |
4565 | .deserialize_item = service_deserialize_item, | |
4566 | ||
4567 | .active_state = service_active_state, | |
4568 | .sub_state_to_string = service_sub_state_to_string, | |
4569 | ||
4570 | .will_restart = service_will_restart, | |
4571 | ||
4572 | .may_gc = service_may_gc, | |
4573 | ||
4574 | .sigchld_event = service_sigchld_event, | |
4575 | ||
4576 | .reset_failed = service_reset_failed, | |
4577 | ||
4578 | .notify_cgroup_empty = service_notify_cgroup_empty_event, | |
4579 | .notify_cgroup_oom = service_notify_cgroup_oom_event, | |
4580 | .notify_message = service_notify_message, | |
4581 | ||
4582 | .main_pid = service_main_pid, | |
4583 | .control_pid = service_control_pid, | |
4584 | ||
4585 | .bus_name_owner_change = service_bus_name_owner_change, | |
4586 | ||
4587 | .bus_set_property = bus_service_set_property, | |
4588 | .bus_commit_properties = bus_service_commit_properties, | |
4589 | ||
4590 | .get_timeout = service_get_timeout, | |
4591 | .needs_console = service_needs_console, | |
4592 | .exit_status = service_exit_status, | |
4593 | ||
4594 | .status_message_formats = { | |
4595 | .finished_start_job = { | |
4596 | [JOB_FAILED] = "Failed to start %s.", | |
4597 | }, | |
4598 | .finished_stop_job = { | |
4599 | [JOB_DONE] = "Stopped %s.", | |
4600 | [JOB_FAILED] = "Stopped (with error) %s.", | |
4601 | }, | |
4602 | .finished_job = service_finished_job, | |
4603 | }, | |
4604 | }; |