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