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