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Merge pull request #3681 from walyong/systemctl_condition
[thirdparty/systemd.git] / src / core / service.c
1 /***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include <errno.h>
21 #include <signal.h>
22 #include <unistd.h>
23
24 #include "alloc-util.h"
25 #include "async.h"
26 #include "bus-error.h"
27 #include "bus-kernel.h"
28 #include "bus-util.h"
29 #include "dbus-service.h"
30 #include "def.h"
31 #include "env-util.h"
32 #include "escape.h"
33 #include "exit-status.h"
34 #include "fd-util.h"
35 #include "fileio.h"
36 #include "formats-util.h"
37 #include "fs-util.h"
38 #include "load-dropin.h"
39 #include "load-fragment.h"
40 #include "log.h"
41 #include "manager.h"
42 #include "parse-util.h"
43 #include "path-util.h"
44 #include "process-util.h"
45 #include "service.h"
46 #include "signal-util.h"
47 #include "special.h"
48 #include "string-table.h"
49 #include "string-util.h"
50 #include "strv.h"
51 #include "unit-name.h"
52 #include "unit-printf.h"
53 #include "unit.h"
54 #include "utf8.h"
55 #include "util.h"
56
57 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
58 [SERVICE_DEAD] = UNIT_INACTIVE,
59 [SERVICE_START_PRE] = UNIT_ACTIVATING,
60 [SERVICE_START] = UNIT_ACTIVATING,
61 [SERVICE_START_POST] = UNIT_ACTIVATING,
62 [SERVICE_RUNNING] = UNIT_ACTIVE,
63 [SERVICE_EXITED] = UNIT_ACTIVE,
64 [SERVICE_RELOAD] = UNIT_RELOADING,
65 [SERVICE_STOP] = UNIT_DEACTIVATING,
66 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
67 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
68 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
69 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
70 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
71 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
72 [SERVICE_FAILED] = UNIT_FAILED,
73 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
74 };
75
76 /* For Type=idle we never want to delay any other jobs, hence we
77 * consider idle jobs active as soon as we start working on them */
78 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
79 [SERVICE_DEAD] = UNIT_INACTIVE,
80 [SERVICE_START_PRE] = UNIT_ACTIVE,
81 [SERVICE_START] = UNIT_ACTIVE,
82 [SERVICE_START_POST] = UNIT_ACTIVE,
83 [SERVICE_RUNNING] = UNIT_ACTIVE,
84 [SERVICE_EXITED] = UNIT_ACTIVE,
85 [SERVICE_RELOAD] = UNIT_RELOADING,
86 [SERVICE_STOP] = UNIT_DEACTIVATING,
87 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
88 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
89 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
90 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
91 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
92 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
93 [SERVICE_FAILED] = UNIT_FAILED,
94 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
95 };
96
97 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
98 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
99 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
100
101 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
102 static void service_enter_reload_by_notify(Service *s);
103
104 static void service_init(Unit *u) {
105 Service *s = SERVICE(u);
106
107 assert(u);
108 assert(u->load_state == UNIT_STUB);
109
110 s->timeout_start_usec = u->manager->default_timeout_start_usec;
111 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
112 s->restart_usec = u->manager->default_restart_usec;
113 s->runtime_max_usec = USEC_INFINITY;
114 s->type = _SERVICE_TYPE_INVALID;
115 s->socket_fd = -1;
116 s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
117 s->guess_main_pid = true;
118
119 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
120 }
121
122 static void service_unwatch_control_pid(Service *s) {
123 assert(s);
124
125 if (s->control_pid <= 0)
126 return;
127
128 unit_unwatch_pid(UNIT(s), s->control_pid);
129 s->control_pid = 0;
130 }
131
132 static void service_unwatch_main_pid(Service *s) {
133 assert(s);
134
135 if (s->main_pid <= 0)
136 return;
137
138 unit_unwatch_pid(UNIT(s), s->main_pid);
139 s->main_pid = 0;
140 }
141
142 static void service_unwatch_pid_file(Service *s) {
143 if (!s->pid_file_pathspec)
144 return;
145
146 log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path);
147 path_spec_unwatch(s->pid_file_pathspec);
148 path_spec_done(s->pid_file_pathspec);
149 s->pid_file_pathspec = mfree(s->pid_file_pathspec);
150 }
151
152 static int service_set_main_pid(Service *s, pid_t pid) {
153 pid_t ppid;
154
155 assert(s);
156
157 if (pid <= 1)
158 return -EINVAL;
159
160 if (pid == getpid())
161 return -EINVAL;
162
163 if (s->main_pid == pid && s->main_pid_known)
164 return 0;
165
166 if (s->main_pid != pid) {
167 service_unwatch_main_pid(s);
168 exec_status_start(&s->main_exec_status, pid);
169 }
170
171 s->main_pid = pid;
172 s->main_pid_known = true;
173
174 if (get_process_ppid(pid, &ppid) >= 0 && ppid != getpid()) {
175 log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid);
176 s->main_pid_alien = true;
177 } else
178 s->main_pid_alien = false;
179
180 return 0;
181 }
182
183 void service_close_socket_fd(Service *s) {
184 assert(s);
185
186 /* Undo the effect of service_set_socket_fd(). */
187
188 s->socket_fd = asynchronous_close(s->socket_fd);
189
190 if (UNIT_ISSET(s->accept_socket)) {
191 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
192 unit_ref_unset(&s->accept_socket);
193 }
194 }
195
196 static void service_stop_watchdog(Service *s) {
197 assert(s);
198
199 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
200 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
201 }
202
203 static usec_t service_get_watchdog_usec(Service *s) {
204 assert(s);
205
206 if (s->watchdog_override_enable)
207 return s->watchdog_override_usec;
208 else
209 return s->watchdog_usec;
210 }
211
212 static void service_start_watchdog(Service *s) {
213 int r;
214 usec_t watchdog_usec;
215
216 assert(s);
217
218 watchdog_usec = service_get_watchdog_usec(s);
219 if (watchdog_usec == 0 || watchdog_usec == USEC_INFINITY)
220 return;
221
222 if (s->watchdog_event_source) {
223 r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, watchdog_usec));
224 if (r < 0) {
225 log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m");
226 return;
227 }
228
229 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
230 } else {
231 r = sd_event_add_time(
232 UNIT(s)->manager->event,
233 &s->watchdog_event_source,
234 CLOCK_MONOTONIC,
235 usec_add(s->watchdog_timestamp.monotonic, watchdog_usec), 0,
236 service_dispatch_watchdog, s);
237 if (r < 0) {
238 log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m");
239 return;
240 }
241
242 (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog");
243
244 /* Let's process everything else which might be a sign
245 * of living before we consider a service died. */
246 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
247 }
248
249 if (r < 0)
250 log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m");
251 }
252
253 static void service_reset_watchdog(Service *s) {
254 assert(s);
255
256 dual_timestamp_get(&s->watchdog_timestamp);
257 service_start_watchdog(s);
258 }
259
260 static void service_reset_watchdog_timeout(Service *s, usec_t watchdog_override_usec) {
261 assert(s);
262
263 s->watchdog_override_enable = true;
264 s->watchdog_override_usec = watchdog_override_usec;
265 service_reset_watchdog(s);
266
267 log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec);
268 log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec);
269 }
270
271 static void service_fd_store_unlink(ServiceFDStore *fs) {
272
273 if (!fs)
274 return;
275
276 if (fs->service) {
277 assert(fs->service->n_fd_store > 0);
278 LIST_REMOVE(fd_store, fs->service->fd_store, fs);
279 fs->service->n_fd_store--;
280 }
281
282 if (fs->event_source) {
283 sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
284 sd_event_source_unref(fs->event_source);
285 }
286
287 free(fs->fdname);
288 safe_close(fs->fd);
289 free(fs);
290 }
291
292 static void service_release_resources(Unit *u) {
293 Service *s = SERVICE(u);
294
295 assert(s);
296
297 if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0)
298 return;
299
300 log_unit_debug(u, "Releasing all resources.");
301
302 s->stdin_fd = safe_close(s->stdin_fd);
303 s->stdout_fd = safe_close(s->stdout_fd);
304 s->stderr_fd = safe_close(s->stderr_fd);
305
306 while (s->fd_store)
307 service_fd_store_unlink(s->fd_store);
308
309 assert(s->n_fd_store == 0);
310 }
311
312 static void service_done(Unit *u) {
313 Service *s = SERVICE(u);
314
315 assert(s);
316
317 s->pid_file = mfree(s->pid_file);
318 s->status_text = mfree(s->status_text);
319
320 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
321 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
322 s->control_command = NULL;
323 s->main_command = NULL;
324
325 exit_status_set_free(&s->restart_prevent_status);
326 exit_status_set_free(&s->restart_force_status);
327 exit_status_set_free(&s->success_status);
328
329 /* This will leak a process, but at least no memory or any of
330 * our resources */
331 service_unwatch_main_pid(s);
332 service_unwatch_control_pid(s);
333 service_unwatch_pid_file(s);
334
335 if (s->bus_name) {
336 unit_unwatch_bus_name(u, s->bus_name);
337 s->bus_name = mfree(s->bus_name);
338 }
339
340 s->bus_name_owner = mfree(s->bus_name_owner);
341
342 service_close_socket_fd(s);
343
344 unit_ref_unset(&s->accept_socket);
345
346 service_stop_watchdog(s);
347
348 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
349
350 service_release_resources(u);
351 }
352
353 static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
354 ServiceFDStore *fs = userdata;
355
356 assert(e);
357 assert(fs);
358
359 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
360 service_fd_store_unlink(fs);
361 return 0;
362 }
363
364 static int service_add_fd_store(Service *s, int fd, const char *name) {
365 ServiceFDStore *fs;
366 int r;
367
368 assert(s);
369 assert(fd >= 0);
370
371 if (s->n_fd_store >= s->n_fd_store_max)
372 return 0;
373
374 LIST_FOREACH(fd_store, fs, s->fd_store) {
375 r = same_fd(fs->fd, fd);
376 if (r < 0)
377 return r;
378 if (r > 0) {
379 /* Already included */
380 safe_close(fd);
381 return 1;
382 }
383 }
384
385 fs = new0(ServiceFDStore, 1);
386 if (!fs)
387 return -ENOMEM;
388
389 fs->fd = fd;
390 fs->service = s;
391 fs->fdname = strdup(name ?: "stored");
392 if (!fs->fdname) {
393 free(fs);
394 return -ENOMEM;
395 }
396
397 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
398 if (r < 0) {
399 free(fs->fdname);
400 free(fs);
401 return r;
402 }
403
404 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
405
406 LIST_PREPEND(fd_store, s->fd_store, fs);
407 s->n_fd_store++;
408
409 return 1;
410 }
411
412 static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
413 int r;
414
415 assert(s);
416
417 if (fdset_size(fds) <= 0)
418 return 0;
419
420 while (s->n_fd_store < s->n_fd_store_max) {
421 _cleanup_close_ int fd = -1;
422
423 fd = fdset_steal_first(fds);
424 if (fd < 0)
425 break;
426
427 r = service_add_fd_store(s, fd, name);
428 if (r < 0)
429 return log_unit_error_errno(UNIT(s), r, "Couldn't add fd to fd store: %m");
430 if (r > 0) {
431 log_unit_debug(UNIT(s), "Added fd to fd store.");
432 fd = -1;
433 }
434 }
435
436 if (fdset_size(fds) > 0)
437 log_unit_warning(UNIT(s), "Tried to store more fds than FileDescriptorStoreMax=%u allows, closing remaining.", s->n_fd_store_max);
438
439 return 0;
440 }
441
442 static int service_arm_timer(Service *s, usec_t usec) {
443 int r;
444
445 assert(s);
446
447 if (s->timer_event_source) {
448 r = sd_event_source_set_time(s->timer_event_source, usec);
449 if (r < 0)
450 return r;
451
452 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
453 }
454
455 if (usec == USEC_INFINITY)
456 return 0;
457
458 r = sd_event_add_time(
459 UNIT(s)->manager->event,
460 &s->timer_event_source,
461 CLOCK_MONOTONIC,
462 usec, 0,
463 service_dispatch_timer, s);
464 if (r < 0)
465 return r;
466
467 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
468
469 return 0;
470 }
471
472 static int service_verify(Service *s) {
473 assert(s);
474
475 if (UNIT(s)->load_state != UNIT_LOADED)
476 return 0;
477
478 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
479 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
480 return -EINVAL;
481 }
482
483 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
484 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
485 return -EINVAL;
486 }
487
488 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
489 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
490 return -EINVAL;
491 }
492
493 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
494 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
495 return -EINVAL;
496 }
497
498 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
499 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
500 return -EINVAL;
501 }
502
503 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
504 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
505 return -EINVAL;
506 }
507
508 if (s->type == SERVICE_DBUS && !s->bus_name) {
509 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
510 return -EINVAL;
511 }
512
513 if (s->bus_name && s->type != SERVICE_DBUS)
514 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
515
516 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
517 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
518 return -EINVAL;
519 }
520
521 if (s->usb_function_descriptors && !s->usb_function_strings)
522 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
523
524 if (!s->usb_function_descriptors && s->usb_function_strings)
525 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
526
527 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
528 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
529
530 return 0;
531 }
532
533 static int service_add_default_dependencies(Service *s) {
534 int r;
535
536 assert(s);
537
538 if (!UNIT(s)->default_dependencies)
539 return 0;
540
541 /* Add a number of automatic dependencies useful for the
542 * majority of services. */
543
544 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
545 /* First, pull in the really early boot stuff, and
546 * require it, so that we fail if we can't acquire
547 * it. */
548
549 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
550 if (r < 0)
551 return r;
552 } else {
553
554 /* In the --user instance there's no sysinit.target,
555 * in that case require basic.target instead. */
556
557 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
558 if (r < 0)
559 return r;
560 }
561
562 /* Second, if the rest of the base system is in the same
563 * transaction, order us after it, but do not pull it in or
564 * even require it. */
565 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
566 if (r < 0)
567 return r;
568
569 /* Third, add us in for normal shutdown. */
570 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
571 }
572
573 static void service_fix_output(Service *s) {
574 assert(s);
575
576 /* If nothing has been explicitly configured, patch default
577 * output in. If input is socket/tty we avoid this however,
578 * since in that case we want output to default to the same
579 * place as we read input from. */
580
581 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
582 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
583 s->exec_context.std_input == EXEC_INPUT_NULL)
584 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
585
586 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
587 s->exec_context.std_input == EXEC_INPUT_NULL)
588 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
589 }
590
591 static int service_setup_bus_name(Service *s) {
592 int r;
593
594 assert(s);
595
596 if (!s->bus_name)
597 return 0;
598
599 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
600 if (r < 0)
601 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
602
603 /* Regardless if kdbus is used or not, we always want to be ordered against dbus.socket if both are in the transaction. */
604 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
605 if (r < 0)
606 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
607
608 r = unit_watch_bus_name(UNIT(s), s->bus_name);
609 if (r == -EEXIST)
610 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
611 if (r < 0)
612 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
613
614 return 0;
615 }
616
617 static int service_add_extras(Service *s) {
618 int r;
619
620 assert(s);
621
622 if (s->type == _SERVICE_TYPE_INVALID) {
623 /* Figure out a type automatically */
624 if (s->bus_name)
625 s->type = SERVICE_DBUS;
626 else if (s->exec_command[SERVICE_EXEC_START])
627 s->type = SERVICE_SIMPLE;
628 else
629 s->type = SERVICE_ONESHOT;
630 }
631
632 /* Oneshot services have disabled start timeout by default */
633 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
634 s->timeout_start_usec = USEC_INFINITY;
635
636 service_fix_output(s);
637
638 r = unit_patch_contexts(UNIT(s));
639 if (r < 0)
640 return r;
641
642 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
643 if (r < 0)
644 return r;
645
646 r = unit_set_default_slice(UNIT(s));
647 if (r < 0)
648 return r;
649
650 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
651 s->notify_access = NOTIFY_MAIN;
652
653 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
654 s->notify_access = NOTIFY_MAIN;
655
656 r = service_add_default_dependencies(s);
657 if (r < 0)
658 return r;
659
660 r = service_setup_bus_name(s);
661 if (r < 0)
662 return r;
663
664 return 0;
665 }
666
667 static int service_load(Unit *u) {
668 Service *s = SERVICE(u);
669 int r;
670
671 assert(s);
672
673 /* Load a .service file */
674 r = unit_load_fragment(u);
675 if (r < 0)
676 return r;
677
678 /* Still nothing found? Then let's give up */
679 if (u->load_state == UNIT_STUB)
680 return -ENOENT;
681
682 /* This is a new unit? Then let's add in some extras */
683 if (u->load_state == UNIT_LOADED) {
684
685 /* We were able to load something, then let's add in
686 * the dropin directories. */
687 r = unit_load_dropin(u);
688 if (r < 0)
689 return r;
690
691 /* This is a new unit? Then let's add in some
692 * extras */
693 r = service_add_extras(s);
694 if (r < 0)
695 return r;
696 }
697
698 return service_verify(s);
699 }
700
701 static void service_dump(Unit *u, FILE *f, const char *prefix) {
702 ServiceExecCommand c;
703 Service *s = SERVICE(u);
704 const char *prefix2;
705
706 assert(s);
707
708 prefix = strempty(prefix);
709 prefix2 = strjoina(prefix, "\t");
710
711 fprintf(f,
712 "%sService State: %s\n"
713 "%sResult: %s\n"
714 "%sReload Result: %s\n"
715 "%sPermissionsStartOnly: %s\n"
716 "%sRootDirectoryStartOnly: %s\n"
717 "%sRemainAfterExit: %s\n"
718 "%sGuessMainPID: %s\n"
719 "%sType: %s\n"
720 "%sRestart: %s\n"
721 "%sNotifyAccess: %s\n"
722 "%sNotifyState: %s\n",
723 prefix, service_state_to_string(s->state),
724 prefix, service_result_to_string(s->result),
725 prefix, service_result_to_string(s->reload_result),
726 prefix, yes_no(s->permissions_start_only),
727 prefix, yes_no(s->root_directory_start_only),
728 prefix, yes_no(s->remain_after_exit),
729 prefix, yes_no(s->guess_main_pid),
730 prefix, service_type_to_string(s->type),
731 prefix, service_restart_to_string(s->restart),
732 prefix, notify_access_to_string(s->notify_access),
733 prefix, notify_state_to_string(s->notify_state));
734
735 if (s->control_pid > 0)
736 fprintf(f,
737 "%sControl PID: "PID_FMT"\n",
738 prefix, s->control_pid);
739
740 if (s->main_pid > 0)
741 fprintf(f,
742 "%sMain PID: "PID_FMT"\n"
743 "%sMain PID Known: %s\n"
744 "%sMain PID Alien: %s\n",
745 prefix, s->main_pid,
746 prefix, yes_no(s->main_pid_known),
747 prefix, yes_no(s->main_pid_alien));
748
749 if (s->pid_file)
750 fprintf(f,
751 "%sPIDFile: %s\n",
752 prefix, s->pid_file);
753
754 if (s->bus_name)
755 fprintf(f,
756 "%sBusName: %s\n"
757 "%sBus Name Good: %s\n",
758 prefix, s->bus_name,
759 prefix, yes_no(s->bus_name_good));
760
761 kill_context_dump(&s->kill_context, f, prefix);
762 exec_context_dump(&s->exec_context, f, prefix);
763
764 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
765
766 if (!s->exec_command[c])
767 continue;
768
769 fprintf(f, "%s-> %s:\n",
770 prefix, service_exec_command_to_string(c));
771
772 exec_command_dump_list(s->exec_command[c], f, prefix2);
773 }
774
775 if (s->status_text)
776 fprintf(f, "%sStatus Text: %s\n",
777 prefix, s->status_text);
778
779 if (s->n_fd_store_max > 0)
780 fprintf(f,
781 "%sFile Descriptor Store Max: %u\n"
782 "%sFile Descriptor Store Current: %u\n",
783 prefix, s->n_fd_store_max,
784 prefix, s->n_fd_store);
785 }
786
787 static int service_load_pid_file(Service *s, bool may_warn) {
788 _cleanup_free_ char *k = NULL;
789 int r;
790 pid_t pid;
791
792 assert(s);
793
794 if (!s->pid_file)
795 return -ENOENT;
796
797 r = read_one_line_file(s->pid_file, &k);
798 if (r < 0) {
799 if (may_warn)
800 log_unit_info_errno(UNIT(s), r, "PID file %s not readable (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state));
801 return r;
802 }
803
804 r = parse_pid(k, &pid);
805 if (r < 0) {
806 if (may_warn)
807 log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
808 return r;
809 }
810
811 if (!pid_is_alive(pid)) {
812 if (may_warn)
813 log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
814 return -ESRCH;
815 }
816
817 if (s->main_pid_known) {
818 if (pid == s->main_pid)
819 return 0;
820
821 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
822
823 service_unwatch_main_pid(s);
824 s->main_pid_known = false;
825 } else
826 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
827
828 r = service_set_main_pid(s, pid);
829 if (r < 0)
830 return r;
831
832 r = unit_watch_pid(UNIT(s), pid);
833 if (r < 0) {
834 /* FIXME: we need to do something here */
835 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
836 return r;
837 }
838
839 return 0;
840 }
841
842 static void service_search_main_pid(Service *s) {
843 pid_t pid = 0;
844 int r;
845
846 assert(s);
847
848 /* If we know it anyway, don't ever fallback to unreliable
849 * heuristics */
850 if (s->main_pid_known)
851 return;
852
853 if (!s->guess_main_pid)
854 return;
855
856 assert(s->main_pid <= 0);
857
858 if (unit_search_main_pid(UNIT(s), &pid) < 0)
859 return;
860
861 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
862 if (service_set_main_pid(s, pid) < 0)
863 return;
864
865 r = unit_watch_pid(UNIT(s), pid);
866 if (r < 0)
867 /* FIXME: we need to do something here */
868 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
869 }
870
871 static void service_set_state(Service *s, ServiceState state) {
872 ServiceState old_state;
873 const UnitActiveState *table;
874
875 assert(s);
876
877 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
878
879 old_state = s->state;
880 s->state = state;
881
882 service_unwatch_pid_file(s);
883
884 if (!IN_SET(state,
885 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
886 SERVICE_RUNNING,
887 SERVICE_RELOAD,
888 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
889 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
890 SERVICE_AUTO_RESTART))
891 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
892
893 if (!IN_SET(state,
894 SERVICE_START, SERVICE_START_POST,
895 SERVICE_RUNNING, SERVICE_RELOAD,
896 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
897 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
898 service_unwatch_main_pid(s);
899 s->main_command = NULL;
900 }
901
902 if (!IN_SET(state,
903 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
904 SERVICE_RELOAD,
905 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
906 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
907 service_unwatch_control_pid(s);
908 s->control_command = NULL;
909 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
910 }
911
912 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
913 unit_unwatch_all_pids(UNIT(s));
914
915 if (!IN_SET(state,
916 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
917 SERVICE_RUNNING, SERVICE_RELOAD,
918 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
919 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
920 !(state == SERVICE_DEAD && UNIT(s)->job))
921 service_close_socket_fd(s);
922
923 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
924 service_stop_watchdog(s);
925
926 /* For the inactive states unit_notify() will trim the cgroup,
927 * but for exit we have to do that ourselves... */
928 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
929 unit_prune_cgroup(UNIT(s));
930
931 /* For remain_after_exit services, let's see if we can "release" the
932 * hold on the console, since unit_notify() only does that in case of
933 * change of state */
934 if (state == SERVICE_EXITED &&
935 s->remain_after_exit &&
936 UNIT(s)->manager->n_on_console > 0) {
937
938 ExecContext *ec;
939
940 ec = unit_get_exec_context(UNIT(s));
941 if (ec && exec_context_may_touch_console(ec)) {
942 Manager *m = UNIT(s)->manager;
943
944 m->n_on_console--;
945 if (m->n_on_console == 0)
946 /* unset no_console_output flag, since the console is free */
947 m->no_console_output = false;
948 }
949 }
950
951 if (old_state != state)
952 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
953
954 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
955 }
956
957 static usec_t service_coldplug_timeout(Service *s) {
958 assert(s);
959
960 switch (s->deserialized_state) {
961
962 case SERVICE_START_PRE:
963 case SERVICE_START:
964 case SERVICE_START_POST:
965 case SERVICE_RELOAD:
966 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
967
968 case SERVICE_RUNNING:
969 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
970
971 case SERVICE_STOP:
972 case SERVICE_STOP_SIGABRT:
973 case SERVICE_STOP_SIGTERM:
974 case SERVICE_STOP_SIGKILL:
975 case SERVICE_STOP_POST:
976 case SERVICE_FINAL_SIGTERM:
977 case SERVICE_FINAL_SIGKILL:
978 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
979
980 case SERVICE_AUTO_RESTART:
981 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
982
983 default:
984 return USEC_INFINITY;
985 }
986 }
987
988 static int service_coldplug(Unit *u) {
989 Service *s = SERVICE(u);
990 int r;
991
992 assert(s);
993 assert(s->state == SERVICE_DEAD);
994
995 if (s->deserialized_state == s->state)
996 return 0;
997
998 r = service_arm_timer(s, service_coldplug_timeout(s));
999 if (r < 0)
1000 return r;
1001
1002 if (s->main_pid > 0 &&
1003 pid_is_unwaited(s->main_pid) &&
1004 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1005 IN_SET(s->deserialized_state,
1006 SERVICE_START, SERVICE_START_POST,
1007 SERVICE_RUNNING, SERVICE_RELOAD,
1008 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1009 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1010 r = unit_watch_pid(UNIT(s), s->main_pid);
1011 if (r < 0)
1012 return r;
1013 }
1014
1015 if (s->control_pid > 0 &&
1016 pid_is_unwaited(s->control_pid) &&
1017 IN_SET(s->deserialized_state,
1018 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1019 SERVICE_RELOAD,
1020 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1021 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1022 r = unit_watch_pid(UNIT(s), s->control_pid);
1023 if (r < 0)
1024 return r;
1025 }
1026
1027 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1028 unit_watch_all_pids(UNIT(s));
1029
1030 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1031 service_start_watchdog(s);
1032
1033 service_set_state(s, s->deserialized_state);
1034 return 0;
1035 }
1036
1037 static int service_collect_fds(Service *s, int **fds, char ***fd_names) {
1038 _cleanup_strv_free_ char **rfd_names = NULL;
1039 _cleanup_free_ int *rfds = NULL;
1040 int rn_fds = 0, r;
1041
1042 assert(s);
1043 assert(fds);
1044 assert(fd_names);
1045
1046 if (s->socket_fd >= 0) {
1047
1048 /* Pass the per-connection socket */
1049
1050 rfds = new(int, 1);
1051 if (!rfds)
1052 return -ENOMEM;
1053 rfds[0] = s->socket_fd;
1054
1055 rfd_names = strv_new("connection", NULL);
1056 if (!rfd_names)
1057 return -ENOMEM;
1058
1059 rn_fds = 1;
1060 } else {
1061 Iterator i;
1062 Unit *u;
1063
1064 /* Pass all our configured sockets for singleton services */
1065
1066 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1067 _cleanup_free_ int *cfds = NULL;
1068 Socket *sock;
1069 int cn_fds;
1070
1071 if (u->type != UNIT_SOCKET)
1072 continue;
1073
1074 sock = SOCKET(u);
1075
1076 cn_fds = socket_collect_fds(sock, &cfds);
1077 if (cn_fds < 0)
1078 return cn_fds;
1079
1080 if (cn_fds <= 0)
1081 continue;
1082
1083 if (!rfds) {
1084 rfds = cfds;
1085 rn_fds = cn_fds;
1086
1087 cfds = NULL;
1088 } else {
1089 int *t;
1090
1091 t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int));
1092 if (!t)
1093 return -ENOMEM;
1094
1095 memcpy(t + rn_fds, cfds, cn_fds * sizeof(int));
1096
1097 rfds = t;
1098 rn_fds += cn_fds;
1099 }
1100
1101 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1102 if (r < 0)
1103 return r;
1104 }
1105 }
1106
1107 if (s->n_fd_store > 0) {
1108 ServiceFDStore *fs;
1109 char **nl;
1110 int *t;
1111
1112 t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int));
1113 if (!t)
1114 return -ENOMEM;
1115
1116 rfds = t;
1117
1118 nl = realloc(rfd_names, (rn_fds + s->n_fd_store + 1) * sizeof(char*));
1119 if (!nl)
1120 return -ENOMEM;
1121
1122 rfd_names = nl;
1123
1124 LIST_FOREACH(fd_store, fs, s->fd_store) {
1125 rfds[rn_fds] = fs->fd;
1126 rfd_names[rn_fds] = strdup(strempty(fs->fdname));
1127 if (!rfd_names[rn_fds])
1128 return -ENOMEM;
1129
1130 rn_fds++;
1131 }
1132
1133 rfd_names[rn_fds] = NULL;
1134 }
1135
1136 *fds = rfds;
1137 *fd_names = rfd_names;
1138
1139 rfds = NULL;
1140 rfd_names = NULL;
1141
1142 return rn_fds;
1143 }
1144
1145 static int service_spawn(
1146 Service *s,
1147 ExecCommand *c,
1148 usec_t timeout,
1149 bool pass_fds,
1150 bool apply_permissions,
1151 bool apply_chroot,
1152 bool apply_tty_stdin,
1153 bool is_control,
1154 pid_t *_pid) {
1155
1156 _cleanup_strv_free_ char **argv = NULL, **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1157 _cleanup_free_ int *fds = NULL;
1158 unsigned n_fds = 0, n_env = 0;
1159 const char *path;
1160 pid_t pid;
1161
1162 ExecParameters exec_params = {
1163 .apply_permissions = apply_permissions,
1164 .apply_chroot = apply_chroot,
1165 .apply_tty_stdin = apply_tty_stdin,
1166 .stdin_fd = -1,
1167 .stdout_fd = -1,
1168 .stderr_fd = -1,
1169 };
1170
1171 int r;
1172
1173 assert(s);
1174 assert(c);
1175 assert(_pid);
1176
1177 (void) unit_realize_cgroup(UNIT(s));
1178 if (s->reset_cpu_usage) {
1179 (void) unit_reset_cpu_usage(UNIT(s));
1180 s->reset_cpu_usage = false;
1181 }
1182
1183 r = unit_setup_exec_runtime(UNIT(s));
1184 if (r < 0)
1185 return r;
1186
1187 if (pass_fds ||
1188 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1189 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1190 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1191
1192 r = service_collect_fds(s, &fds, &fd_names);
1193 if (r < 0)
1194 return r;
1195
1196 n_fds = r;
1197 }
1198
1199 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1200 if (r < 0)
1201 return r;
1202
1203 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1204 if (r < 0)
1205 return r;
1206
1207 our_env = new0(char*, 6);
1208 if (!our_env)
1209 return -ENOMEM;
1210
1211 if (is_control ? s->notify_access == NOTIFY_ALL : s->notify_access != NOTIFY_NONE)
1212 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1213 return -ENOMEM;
1214
1215 if (s->main_pid > 0)
1216 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1217 return -ENOMEM;
1218
1219 if (!MANAGER_IS_SYSTEM(UNIT(s)->manager))
1220 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0)
1221 return -ENOMEM;
1222
1223 if (s->socket_fd >= 0) {
1224 union sockaddr_union sa;
1225 socklen_t salen = sizeof(sa);
1226
1227 r = getpeername(s->socket_fd, &sa.sa, &salen);
1228 if (r < 0)
1229 return -errno;
1230
1231 if (IN_SET(sa.sa.sa_family, AF_INET, AF_INET6)) {
1232 _cleanup_free_ char *addr = NULL;
1233 char *t;
1234 int port;
1235
1236 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1237 if (r < 0)
1238 return r;
1239
1240 t = strappend("REMOTE_ADDR=", addr);
1241 if (!t)
1242 return -ENOMEM;
1243 our_env[n_env++] = t;
1244
1245 port = sockaddr_port(&sa.sa);
1246 if (port < 0)
1247 return port;
1248
1249 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1250 return -ENOMEM;
1251 our_env[n_env++] = t;
1252 }
1253 }
1254
1255 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1256 if (!final_env)
1257 return -ENOMEM;
1258
1259 if (is_control && UNIT(s)->cgroup_path) {
1260 path = strjoina(UNIT(s)->cgroup_path, "/control");
1261 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1262 } else
1263 path = UNIT(s)->cgroup_path;
1264
1265 exec_params.argv = argv;
1266 exec_params.fds = fds;
1267 exec_params.fd_names = fd_names;
1268 exec_params.n_fds = n_fds;
1269 exec_params.environment = final_env;
1270 exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn;
1271 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1272 exec_params.cgroup_path = path;
1273 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1274 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1275 exec_params.watchdog_usec = s->watchdog_usec;
1276 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1277 if (s->type == SERVICE_IDLE)
1278 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1279 exec_params.stdin_fd = s->stdin_fd;
1280 exec_params.stdout_fd = s->stdout_fd;
1281 exec_params.stderr_fd = s->stderr_fd;
1282
1283 r = exec_spawn(UNIT(s),
1284 c,
1285 &s->exec_context,
1286 &exec_params,
1287 s->exec_runtime,
1288 &pid);
1289 if (r < 0)
1290 return r;
1291
1292 r = unit_watch_pid(UNIT(s), pid);
1293 if (r < 0)
1294 /* FIXME: we need to do something here */
1295 return r;
1296
1297 *_pid = pid;
1298
1299 return 0;
1300 }
1301
1302 static int main_pid_good(Service *s) {
1303 assert(s);
1304
1305 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1306 * don't know */
1307
1308 /* If we know the pid file, then let's just check if it is
1309 * still valid */
1310 if (s->main_pid_known) {
1311
1312 /* If it's an alien child let's check if it is still
1313 * alive ... */
1314 if (s->main_pid_alien && s->main_pid > 0)
1315 return pid_is_alive(s->main_pid);
1316
1317 /* .. otherwise assume we'll get a SIGCHLD for it,
1318 * which we really should wait for to collect exit
1319 * status and code */
1320 return s->main_pid > 0;
1321 }
1322
1323 /* We don't know the pid */
1324 return -EAGAIN;
1325 }
1326
1327 _pure_ static int control_pid_good(Service *s) {
1328 assert(s);
1329
1330 return s->control_pid > 0;
1331 }
1332
1333 static int cgroup_good(Service *s) {
1334 int r;
1335
1336 assert(s);
1337
1338 if (!UNIT(s)->cgroup_path)
1339 return 0;
1340
1341 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1342 if (r < 0)
1343 return r;
1344
1345 return !r;
1346 }
1347
1348 static bool service_shall_restart(Service *s) {
1349 assert(s);
1350
1351 /* Don't restart after manual stops */
1352 if (s->forbid_restart)
1353 return false;
1354
1355 /* Never restart if this is configured as special exception */
1356 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1357 return false;
1358
1359 /* Restart if the exit code/status are configured as restart triggers */
1360 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1361 return true;
1362
1363 switch (s->restart) {
1364
1365 case SERVICE_RESTART_NO:
1366 return false;
1367
1368 case SERVICE_RESTART_ALWAYS:
1369 return true;
1370
1371 case SERVICE_RESTART_ON_SUCCESS:
1372 return s->result == SERVICE_SUCCESS;
1373
1374 case SERVICE_RESTART_ON_FAILURE:
1375 return s->result != SERVICE_SUCCESS;
1376
1377 case SERVICE_RESTART_ON_ABNORMAL:
1378 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1379
1380 case SERVICE_RESTART_ON_WATCHDOG:
1381 return s->result == SERVICE_FAILURE_WATCHDOG;
1382
1383 case SERVICE_RESTART_ON_ABORT:
1384 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1385
1386 default:
1387 assert_not_reached("unknown restart setting");
1388 }
1389 }
1390
1391 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1392 int r;
1393 assert(s);
1394
1395 if (f != SERVICE_SUCCESS)
1396 s->result = f;
1397
1398 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1399
1400 if (s->result != SERVICE_SUCCESS) {
1401 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1402 failure_action(UNIT(s)->manager, s->failure_action, UNIT(s)->reboot_arg);
1403 }
1404
1405 if (allow_restart && service_shall_restart(s)) {
1406
1407 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1408 if (r < 0)
1409 goto fail;
1410
1411 service_set_state(s, SERVICE_AUTO_RESTART);
1412 }
1413
1414 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1415 s->forbid_restart = false;
1416
1417 /* We want fresh tmpdirs in case service is started again immediately */
1418 exec_runtime_destroy(s->exec_runtime);
1419 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1420
1421 /* Also, remove the runtime directory in */
1422 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1423
1424 /* Try to delete the pid file. At this point it will be
1425 * out-of-date, and some software might be confused by it, so
1426 * let's remove it. */
1427 if (s->pid_file)
1428 (void) unlink(s->pid_file);
1429
1430 return;
1431
1432 fail:
1433 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1434 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1435 }
1436
1437 static void service_enter_stop_post(Service *s, ServiceResult f) {
1438 int r;
1439 assert(s);
1440
1441 if (f != SERVICE_SUCCESS)
1442 s->result = f;
1443
1444 service_unwatch_control_pid(s);
1445 unit_watch_all_pids(UNIT(s));
1446
1447 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1448 if (s->control_command) {
1449 s->control_command_id = SERVICE_EXEC_STOP_POST;
1450
1451 r = service_spawn(s,
1452 s->control_command,
1453 s->timeout_stop_usec,
1454 false,
1455 !s->permissions_start_only,
1456 !s->root_directory_start_only,
1457 true,
1458 true,
1459 &s->control_pid);
1460 if (r < 0)
1461 goto fail;
1462
1463 service_set_state(s, SERVICE_STOP_POST);
1464 } else
1465 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1466
1467 return;
1468
1469 fail:
1470 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1471 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1472 }
1473
1474 static int state_to_kill_operation(ServiceState state) {
1475 switch (state) {
1476
1477 case SERVICE_STOP_SIGABRT:
1478 return KILL_ABORT;
1479
1480 case SERVICE_STOP_SIGTERM:
1481 case SERVICE_FINAL_SIGTERM:
1482 return KILL_TERMINATE;
1483
1484 case SERVICE_STOP_SIGKILL:
1485 case SERVICE_FINAL_SIGKILL:
1486 return KILL_KILL;
1487
1488 default:
1489 return _KILL_OPERATION_INVALID;
1490 }
1491 }
1492
1493 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1494 int r;
1495
1496 assert(s);
1497
1498 if (f != SERVICE_SUCCESS)
1499 s->result = f;
1500
1501 unit_watch_all_pids(UNIT(s));
1502
1503 r = unit_kill_context(
1504 UNIT(s),
1505 &s->kill_context,
1506 state_to_kill_operation(state),
1507 s->main_pid,
1508 s->control_pid,
1509 s->main_pid_alien);
1510
1511 if (r < 0)
1512 goto fail;
1513
1514 if (r > 0) {
1515 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1516 if (r < 0)
1517 goto fail;
1518
1519 service_set_state(s, state);
1520 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1521 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1522 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1523 service_enter_stop_post(s, SERVICE_SUCCESS);
1524 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1525 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1526 else
1527 service_enter_dead(s, SERVICE_SUCCESS, true);
1528
1529 return;
1530
1531 fail:
1532 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1533
1534 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1535 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1536 else
1537 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1538 }
1539
1540 static void service_enter_stop_by_notify(Service *s) {
1541 assert(s);
1542
1543 unit_watch_all_pids(UNIT(s));
1544
1545 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1546
1547 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1548 service_set_state(s, SERVICE_STOP_SIGTERM);
1549 }
1550
1551 static void service_enter_stop(Service *s, ServiceResult f) {
1552 int r;
1553
1554 assert(s);
1555
1556 if (f != SERVICE_SUCCESS)
1557 s->result = f;
1558
1559 service_unwatch_control_pid(s);
1560 unit_watch_all_pids(UNIT(s));
1561
1562 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1563 if (s->control_command) {
1564 s->control_command_id = SERVICE_EXEC_STOP;
1565
1566 r = service_spawn(s,
1567 s->control_command,
1568 s->timeout_stop_usec,
1569 false,
1570 !s->permissions_start_only,
1571 !s->root_directory_start_only,
1572 false,
1573 true,
1574 &s->control_pid);
1575 if (r < 0)
1576 goto fail;
1577
1578 service_set_state(s, SERVICE_STOP);
1579 } else
1580 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1581
1582 return;
1583
1584 fail:
1585 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1586 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1587 }
1588
1589 static bool service_good(Service *s) {
1590 int main_pid_ok;
1591 assert(s);
1592
1593 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1594 return false;
1595
1596 main_pid_ok = main_pid_good(s);
1597 if (main_pid_ok > 0) /* It's alive */
1598 return true;
1599 if (main_pid_ok == 0) /* It's dead */
1600 return false;
1601
1602 /* OK, we don't know anything about the main PID, maybe
1603 * because there is none. Let's check the control group
1604 * instead. */
1605
1606 return cgroup_good(s) != 0;
1607 }
1608
1609 static void service_enter_running(Service *s, ServiceResult f) {
1610 assert(s);
1611
1612 if (f != SERVICE_SUCCESS)
1613 s->result = f;
1614
1615 service_unwatch_control_pid(s);
1616
1617 if (service_good(s)) {
1618
1619 /* If there are any queued up sd_notify()
1620 * notifications, process them now */
1621 if (s->notify_state == NOTIFY_RELOADING)
1622 service_enter_reload_by_notify(s);
1623 else if (s->notify_state == NOTIFY_STOPPING)
1624 service_enter_stop_by_notify(s);
1625 else {
1626 service_set_state(s, SERVICE_RUNNING);
1627 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1628 }
1629
1630 } else if (s->remain_after_exit)
1631 service_set_state(s, SERVICE_EXITED);
1632 else
1633 service_enter_stop(s, SERVICE_SUCCESS);
1634 }
1635
1636 static void service_enter_start_post(Service *s) {
1637 int r;
1638 assert(s);
1639
1640 service_unwatch_control_pid(s);
1641 service_reset_watchdog(s);
1642
1643 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1644 if (s->control_command) {
1645 s->control_command_id = SERVICE_EXEC_START_POST;
1646
1647 r = service_spawn(s,
1648 s->control_command,
1649 s->timeout_start_usec,
1650 false,
1651 !s->permissions_start_only,
1652 !s->root_directory_start_only,
1653 false,
1654 true,
1655 &s->control_pid);
1656 if (r < 0)
1657 goto fail;
1658
1659 service_set_state(s, SERVICE_START_POST);
1660 } else
1661 service_enter_running(s, SERVICE_SUCCESS);
1662
1663 return;
1664
1665 fail:
1666 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1667 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1668 }
1669
1670 static void service_kill_control_processes(Service *s) {
1671 char *p;
1672
1673 if (!UNIT(s)->cgroup_path)
1674 return;
1675
1676 p = strjoina(UNIT(s)->cgroup_path, "/control");
1677 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, NULL);
1678 }
1679
1680 static void service_enter_start(Service *s) {
1681 ExecCommand *c;
1682 usec_t timeout;
1683 pid_t pid;
1684 int r;
1685
1686 assert(s);
1687
1688 service_unwatch_control_pid(s);
1689 service_unwatch_main_pid(s);
1690
1691 /* We want to ensure that nobody leaks processes from
1692 * START_PRE here, so let's go on a killing spree, People
1693 * should not spawn long running processes from START_PRE. */
1694 service_kill_control_processes(s);
1695
1696 if (s->type == SERVICE_FORKING) {
1697 s->control_command_id = SERVICE_EXEC_START;
1698 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1699
1700 s->main_command = NULL;
1701 } else {
1702 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1703 s->control_command = NULL;
1704
1705 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1706 }
1707
1708 if (!c) {
1709 assert(s->type == SERVICE_ONESHOT);
1710 service_enter_start_post(s);
1711 return;
1712 }
1713
1714 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1715 /* For simple + idle this is the main process. We don't apply any timeout here, but
1716 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1717 timeout = USEC_INFINITY;
1718 else
1719 timeout = s->timeout_start_usec;
1720
1721 r = service_spawn(s,
1722 c,
1723 timeout,
1724 true,
1725 true,
1726 true,
1727 true,
1728 false,
1729 &pid);
1730 if (r < 0)
1731 goto fail;
1732
1733 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1734 /* For simple services we immediately start
1735 * the START_POST binaries. */
1736
1737 service_set_main_pid(s, pid);
1738 service_enter_start_post(s);
1739
1740 } else if (s->type == SERVICE_FORKING) {
1741
1742 /* For forking services we wait until the start
1743 * process exited. */
1744
1745 s->control_pid = pid;
1746 service_set_state(s, SERVICE_START);
1747
1748 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1749
1750 /* For oneshot services we wait until the start
1751 * process exited, too, but it is our main process. */
1752
1753 /* For D-Bus services we know the main pid right away,
1754 * but wait for the bus name to appear on the
1755 * bus. Notify services are similar. */
1756
1757 service_set_main_pid(s, pid);
1758 service_set_state(s, SERVICE_START);
1759 } else
1760 assert_not_reached("Unknown service type");
1761
1762 return;
1763
1764 fail:
1765 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1766 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1767 }
1768
1769 static void service_enter_start_pre(Service *s) {
1770 int r;
1771
1772 assert(s);
1773
1774 service_unwatch_control_pid(s);
1775
1776 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1777 if (s->control_command) {
1778 /* Before we start anything, let's clear up what might
1779 * be left from previous runs. */
1780 service_kill_control_processes(s);
1781
1782 s->control_command_id = SERVICE_EXEC_START_PRE;
1783
1784 r = service_spawn(s,
1785 s->control_command,
1786 s->timeout_start_usec,
1787 false,
1788 !s->permissions_start_only,
1789 !s->root_directory_start_only,
1790 true,
1791 true,
1792 &s->control_pid);
1793 if (r < 0)
1794 goto fail;
1795
1796 service_set_state(s, SERVICE_START_PRE);
1797 } else
1798 service_enter_start(s);
1799
1800 return;
1801
1802 fail:
1803 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1804 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1805 }
1806
1807 static void service_enter_restart(Service *s) {
1808 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1809 int r;
1810
1811 assert(s);
1812
1813 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1814 /* Don't restart things if we are going down anyway */
1815 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1816
1817 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1818 if (r < 0)
1819 goto fail;
1820
1821 return;
1822 }
1823
1824 /* Any units that are bound to this service must also be
1825 * restarted. We use JOB_RESTART (instead of the more obvious
1826 * JOB_START) here so that those dependency jobs will be added
1827 * as well. */
1828 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1829 if (r < 0)
1830 goto fail;
1831
1832 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1833 * it will be canceled as part of the service_stop() call that
1834 * is executed as part of JOB_RESTART. */
1835
1836 log_unit_debug(UNIT(s), "Scheduled restart job.");
1837 return;
1838
1839 fail:
1840 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
1841 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1842 }
1843
1844 static void service_enter_reload_by_notify(Service *s) {
1845 assert(s);
1846
1847 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
1848 service_set_state(s, SERVICE_RELOAD);
1849 }
1850
1851 static void service_enter_reload(Service *s) {
1852 int r;
1853
1854 assert(s);
1855
1856 service_unwatch_control_pid(s);
1857 s->reload_result = SERVICE_SUCCESS;
1858
1859 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1860 if (s->control_command) {
1861 s->control_command_id = SERVICE_EXEC_RELOAD;
1862
1863 r = service_spawn(s,
1864 s->control_command,
1865 s->timeout_start_usec,
1866 false,
1867 !s->permissions_start_only,
1868 !s->root_directory_start_only,
1869 false,
1870 true,
1871 &s->control_pid);
1872 if (r < 0)
1873 goto fail;
1874
1875 service_set_state(s, SERVICE_RELOAD);
1876 } else
1877 service_enter_running(s, SERVICE_SUCCESS);
1878
1879 return;
1880
1881 fail:
1882 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
1883 s->reload_result = SERVICE_FAILURE_RESOURCES;
1884 service_enter_running(s, SERVICE_SUCCESS);
1885 }
1886
1887 static void service_run_next_control(Service *s) {
1888 usec_t timeout;
1889 int r;
1890
1891 assert(s);
1892 assert(s->control_command);
1893 assert(s->control_command->command_next);
1894
1895 assert(s->control_command_id != SERVICE_EXEC_START);
1896
1897 s->control_command = s->control_command->command_next;
1898 service_unwatch_control_pid(s);
1899
1900 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1901 timeout = s->timeout_start_usec;
1902 else
1903 timeout = s->timeout_stop_usec;
1904
1905 r = service_spawn(s,
1906 s->control_command,
1907 timeout,
1908 false,
1909 !s->permissions_start_only,
1910 !s->root_directory_start_only,
1911 s->control_command_id == SERVICE_EXEC_START_PRE ||
1912 s->control_command_id == SERVICE_EXEC_STOP_POST,
1913 true,
1914 &s->control_pid);
1915 if (r < 0)
1916 goto fail;
1917
1918 return;
1919
1920 fail:
1921 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
1922
1923 if (s->state == SERVICE_START_PRE)
1924 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1925 else if (s->state == SERVICE_STOP)
1926 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1927 else if (s->state == SERVICE_STOP_POST)
1928 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1929 else if (s->state == SERVICE_RELOAD) {
1930 s->reload_result = SERVICE_FAILURE_RESOURCES;
1931 service_enter_running(s, SERVICE_SUCCESS);
1932 } else
1933 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1934 }
1935
1936 static void service_run_next_main(Service *s) {
1937 pid_t pid;
1938 int r;
1939
1940 assert(s);
1941 assert(s->main_command);
1942 assert(s->main_command->command_next);
1943 assert(s->type == SERVICE_ONESHOT);
1944
1945 s->main_command = s->main_command->command_next;
1946 service_unwatch_main_pid(s);
1947
1948 r = service_spawn(s,
1949 s->main_command,
1950 s->timeout_start_usec,
1951 true,
1952 true,
1953 true,
1954 true,
1955 false,
1956 &pid);
1957 if (r < 0)
1958 goto fail;
1959
1960 service_set_main_pid(s, pid);
1961
1962 return;
1963
1964 fail:
1965 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
1966 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1967 }
1968
1969 static int service_start(Unit *u) {
1970 Service *s = SERVICE(u);
1971 int r;
1972
1973 assert(s);
1974
1975 /* We cannot fulfill this request right now, try again later
1976 * please! */
1977 if (IN_SET(s->state,
1978 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1979 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
1980 return -EAGAIN;
1981
1982 /* Already on it! */
1983 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
1984 return 0;
1985
1986 /* A service that will be restarted must be stopped first to
1987 * trigger BindsTo and/or OnFailure dependencies. If a user
1988 * does not want to wait for the holdoff time to elapse, the
1989 * service should be manually restarted, not started. We
1990 * simply return EAGAIN here, so that any start jobs stay
1991 * queued, and assume that the auto restart timer will
1992 * eventually trigger the restart. */
1993 if (s->state == SERVICE_AUTO_RESTART)
1994 return -EAGAIN;
1995
1996 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
1997
1998 /* Make sure we don't enter a busy loop of some kind. */
1999 r = unit_start_limit_test(u);
2000 if (r < 0) {
2001 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2002 return r;
2003 }
2004
2005 s->result = SERVICE_SUCCESS;
2006 s->reload_result = SERVICE_SUCCESS;
2007 s->main_pid_known = false;
2008 s->main_pid_alien = false;
2009 s->forbid_restart = false;
2010 s->reset_cpu_usage = true;
2011
2012 s->status_text = mfree(s->status_text);
2013 s->status_errno = 0;
2014
2015 s->notify_state = NOTIFY_UNKNOWN;
2016
2017 s->watchdog_override_enable = false;
2018 s->watchdog_override_usec = 0;
2019
2020 service_enter_start_pre(s);
2021 return 1;
2022 }
2023
2024 static int service_stop(Unit *u) {
2025 Service *s = SERVICE(u);
2026
2027 assert(s);
2028
2029 /* Don't create restart jobs from manual stops. */
2030 s->forbid_restart = true;
2031
2032 /* Already on it */
2033 if (IN_SET(s->state,
2034 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2035 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2036 return 0;
2037
2038 /* A restart will be scheduled or is in progress. */
2039 if (s->state == SERVICE_AUTO_RESTART) {
2040 service_set_state(s, SERVICE_DEAD);
2041 return 0;
2042 }
2043
2044 /* If there's already something running we go directly into
2045 * kill mode. */
2046 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2047 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2048 return 0;
2049 }
2050
2051 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2052
2053 service_enter_stop(s, SERVICE_SUCCESS);
2054 return 1;
2055 }
2056
2057 static int service_reload(Unit *u) {
2058 Service *s = SERVICE(u);
2059
2060 assert(s);
2061
2062 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2063
2064 service_enter_reload(s);
2065 return 1;
2066 }
2067
2068 _pure_ static bool service_can_reload(Unit *u) {
2069 Service *s = SERVICE(u);
2070
2071 assert(s);
2072
2073 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2074 }
2075
2076 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2077 Service *s = SERVICE(u);
2078 ServiceFDStore *fs;
2079 int r;
2080
2081 assert(u);
2082 assert(f);
2083 assert(fds);
2084
2085 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2086 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2087 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2088
2089 if (s->control_pid > 0)
2090 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2091
2092 if (s->main_pid_known && s->main_pid > 0)
2093 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2094
2095 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2096 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2097 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2098
2099 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2100 if (r < 0)
2101 return r;
2102
2103 /* FIXME: There's a minor uncleanliness here: if there are
2104 * multiple commands attached here, we will start from the
2105 * first one again */
2106 if (s->control_command_id >= 0)
2107 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2108
2109 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2110 if (r < 0)
2111 return r;
2112 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2113 if (r < 0)
2114 return r;
2115 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2116 if (r < 0)
2117 return r;
2118
2119 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2120 if (r < 0)
2121 return r;
2122
2123 LIST_FOREACH(fd_store, fs, s->fd_store) {
2124 _cleanup_free_ char *c = NULL;
2125 int copy;
2126
2127 copy = fdset_put_dup(fds, fs->fd);
2128 if (copy < 0)
2129 return copy;
2130
2131 c = cescape(fs->fdname);
2132
2133 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2134 }
2135
2136 if (s->main_exec_status.pid > 0) {
2137 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2138 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2139 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2140
2141 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2142 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2143 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2144 }
2145 }
2146
2147 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2148
2149 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2150
2151 if (s->watchdog_override_enable)
2152 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2153
2154 return 0;
2155 }
2156
2157 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2158 Service *s = SERVICE(u);
2159 int r;
2160
2161 assert(u);
2162 assert(key);
2163 assert(value);
2164 assert(fds);
2165
2166 if (streq(key, "state")) {
2167 ServiceState state;
2168
2169 state = service_state_from_string(value);
2170 if (state < 0)
2171 log_unit_debug(u, "Failed to parse state value: %s", value);
2172 else
2173 s->deserialized_state = state;
2174 } else if (streq(key, "result")) {
2175 ServiceResult f;
2176
2177 f = service_result_from_string(value);
2178 if (f < 0)
2179 log_unit_debug(u, "Failed to parse result value: %s", value);
2180 else if (f != SERVICE_SUCCESS)
2181 s->result = f;
2182
2183 } else if (streq(key, "reload-result")) {
2184 ServiceResult f;
2185
2186 f = service_result_from_string(value);
2187 if (f < 0)
2188 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2189 else if (f != SERVICE_SUCCESS)
2190 s->reload_result = f;
2191
2192 } else if (streq(key, "control-pid")) {
2193 pid_t pid;
2194
2195 if (parse_pid(value, &pid) < 0)
2196 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2197 else
2198 s->control_pid = pid;
2199 } else if (streq(key, "main-pid")) {
2200 pid_t pid;
2201
2202 if (parse_pid(value, &pid) < 0)
2203 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2204 else {
2205 service_set_main_pid(s, pid);
2206 unit_watch_pid(UNIT(s), pid);
2207 }
2208 } else if (streq(key, "main-pid-known")) {
2209 int b;
2210
2211 b = parse_boolean(value);
2212 if (b < 0)
2213 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2214 else
2215 s->main_pid_known = b;
2216 } else if (streq(key, "bus-name-good")) {
2217 int b;
2218
2219 b = parse_boolean(value);
2220 if (b < 0)
2221 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2222 else
2223 s->bus_name_good = b;
2224 } else if (streq(key, "bus-name-owner")) {
2225 r = free_and_strdup(&s->bus_name_owner, value);
2226 if (r < 0)
2227 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2228 } else if (streq(key, "status-text")) {
2229 char *t;
2230
2231 r = cunescape(value, 0, &t);
2232 if (r < 0)
2233 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2234 else {
2235 free(s->status_text);
2236 s->status_text = t;
2237 }
2238
2239 } else if (streq(key, "control-command")) {
2240 ServiceExecCommand id;
2241
2242 id = service_exec_command_from_string(value);
2243 if (id < 0)
2244 log_unit_debug(u, "Failed to parse exec-command value: %s", value);
2245 else {
2246 s->control_command_id = id;
2247 s->control_command = s->exec_command[id];
2248 }
2249 } else if (streq(key, "socket-fd")) {
2250 int fd;
2251
2252 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2253 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2254 else {
2255 asynchronous_close(s->socket_fd);
2256 s->socket_fd = fdset_remove(fds, fd);
2257 }
2258 } else if (streq(key, "fd-store-fd")) {
2259 const char *fdv;
2260 size_t pf;
2261 int fd;
2262
2263 pf = strcspn(value, WHITESPACE);
2264 fdv = strndupa(value, pf);
2265
2266 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2267 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2268 else {
2269 _cleanup_free_ char *t = NULL;
2270 const char *fdn;
2271
2272 fdn = value + pf;
2273 fdn += strspn(fdn, WHITESPACE);
2274 (void) cunescape(fdn, 0, &t);
2275
2276 r = service_add_fd_store(s, fd, t);
2277 if (r < 0)
2278 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2279 else if (r > 0)
2280 fdset_remove(fds, fd);
2281 }
2282
2283 } else if (streq(key, "main-exec-status-pid")) {
2284 pid_t pid;
2285
2286 if (parse_pid(value, &pid) < 0)
2287 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2288 else
2289 s->main_exec_status.pid = pid;
2290 } else if (streq(key, "main-exec-status-code")) {
2291 int i;
2292
2293 if (safe_atoi(value, &i) < 0)
2294 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2295 else
2296 s->main_exec_status.code = i;
2297 } else if (streq(key, "main-exec-status-status")) {
2298 int i;
2299
2300 if (safe_atoi(value, &i) < 0)
2301 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2302 else
2303 s->main_exec_status.status = i;
2304 } else if (streq(key, "main-exec-status-start"))
2305 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2306 else if (streq(key, "main-exec-status-exit"))
2307 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2308 else if (streq(key, "watchdog-timestamp"))
2309 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2310 else if (streq(key, "forbid-restart")) {
2311 int b;
2312
2313 b = parse_boolean(value);
2314 if (b < 0)
2315 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2316 else
2317 s->forbid_restart = b;
2318 } else if (streq(key, "stdin-fd")) {
2319 int fd;
2320
2321 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2322 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2323 else {
2324 asynchronous_close(s->stdin_fd);
2325 s->stdin_fd = fdset_remove(fds, fd);
2326 s->exec_context.stdio_as_fds = true;
2327 }
2328 } else if (streq(key, "stdout-fd")) {
2329 int fd;
2330
2331 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2332 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2333 else {
2334 asynchronous_close(s->stdout_fd);
2335 s->stdout_fd = fdset_remove(fds, fd);
2336 s->exec_context.stdio_as_fds = true;
2337 }
2338 } else if (streq(key, "stderr-fd")) {
2339 int fd;
2340
2341 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2342 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2343 else {
2344 asynchronous_close(s->stderr_fd);
2345 s->stderr_fd = fdset_remove(fds, fd);
2346 s->exec_context.stdio_as_fds = true;
2347 }
2348 } else if (streq(key, "watchdog-override-usec")) {
2349 usec_t watchdog_override_usec;
2350 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2351 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2352 else {
2353 s->watchdog_override_enable = true;
2354 s->watchdog_override_usec = watchdog_override_usec;
2355 }
2356 } else
2357 log_unit_debug(u, "Unknown serialization key: %s", key);
2358
2359 return 0;
2360 }
2361
2362 _pure_ static UnitActiveState service_active_state(Unit *u) {
2363 const UnitActiveState *table;
2364
2365 assert(u);
2366
2367 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2368
2369 return table[SERVICE(u)->state];
2370 }
2371
2372 static const char *service_sub_state_to_string(Unit *u) {
2373 assert(u);
2374
2375 return service_state_to_string(SERVICE(u)->state);
2376 }
2377
2378 static bool service_check_gc(Unit *u) {
2379 Service *s = SERVICE(u);
2380
2381 assert(s);
2382
2383 /* Never clean up services that still have a process around,
2384 * even if the service is formally dead. */
2385 if (cgroup_good(s) > 0 ||
2386 main_pid_good(s) > 0 ||
2387 control_pid_good(s) > 0)
2388 return true;
2389
2390 return false;
2391 }
2392
2393 static int service_retry_pid_file(Service *s) {
2394 int r;
2395
2396 assert(s->pid_file);
2397 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2398
2399 r = service_load_pid_file(s, false);
2400 if (r < 0)
2401 return r;
2402
2403 service_unwatch_pid_file(s);
2404
2405 service_enter_running(s, SERVICE_SUCCESS);
2406 return 0;
2407 }
2408
2409 static int service_watch_pid_file(Service *s) {
2410 int r;
2411
2412 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2413
2414 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2415 if (r < 0)
2416 goto fail;
2417
2418 /* the pidfile might have appeared just before we set the watch */
2419 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2420 service_retry_pid_file(s);
2421
2422 return 0;
2423 fail:
2424 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2425 service_unwatch_pid_file(s);
2426 return r;
2427 }
2428
2429 static int service_demand_pid_file(Service *s) {
2430 PathSpec *ps;
2431
2432 assert(s->pid_file);
2433 assert(!s->pid_file_pathspec);
2434
2435 ps = new0(PathSpec, 1);
2436 if (!ps)
2437 return -ENOMEM;
2438
2439 ps->unit = UNIT(s);
2440 ps->path = strdup(s->pid_file);
2441 if (!ps->path) {
2442 free(ps);
2443 return -ENOMEM;
2444 }
2445
2446 path_kill_slashes(ps->path);
2447
2448 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2449 * keep their PID file open all the time. */
2450 ps->type = PATH_MODIFIED;
2451 ps->inotify_fd = -1;
2452
2453 s->pid_file_pathspec = ps;
2454
2455 return service_watch_pid_file(s);
2456 }
2457
2458 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2459 PathSpec *p = userdata;
2460 Service *s;
2461
2462 assert(p);
2463
2464 s = SERVICE(p->unit);
2465
2466 assert(s);
2467 assert(fd >= 0);
2468 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2469 assert(s->pid_file_pathspec);
2470 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2471
2472 log_unit_debug(UNIT(s), "inotify event");
2473
2474 if (path_spec_fd_event(p, events) < 0)
2475 goto fail;
2476
2477 if (service_retry_pid_file(s) == 0)
2478 return 0;
2479
2480 if (service_watch_pid_file(s) < 0)
2481 goto fail;
2482
2483 return 0;
2484
2485 fail:
2486 service_unwatch_pid_file(s);
2487 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2488 return 0;
2489 }
2490
2491 static void service_notify_cgroup_empty_event(Unit *u) {
2492 Service *s = SERVICE(u);
2493
2494 assert(u);
2495
2496 log_unit_debug(u, "cgroup is empty");
2497
2498 switch (s->state) {
2499
2500 /* Waiting for SIGCHLD is usually more interesting,
2501 * because it includes return codes/signals. Which is
2502 * why we ignore the cgroup events for most cases,
2503 * except when we don't know pid which to expect the
2504 * SIGCHLD for. */
2505
2506 case SERVICE_START:
2507 case SERVICE_START_POST:
2508 /* If we were hoping for the daemon to write its PID file,
2509 * we can give up now. */
2510 if (s->pid_file_pathspec) {
2511 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2512
2513 service_unwatch_pid_file(s);
2514 if (s->state == SERVICE_START)
2515 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2516 else
2517 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2518 }
2519 break;
2520
2521 case SERVICE_RUNNING:
2522 /* service_enter_running() will figure out what to do */
2523 service_enter_running(s, SERVICE_SUCCESS);
2524 break;
2525
2526 case SERVICE_STOP_SIGABRT:
2527 case SERVICE_STOP_SIGTERM:
2528 case SERVICE_STOP_SIGKILL:
2529
2530 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2531 service_enter_stop_post(s, SERVICE_SUCCESS);
2532
2533 break;
2534
2535 case SERVICE_STOP_POST:
2536 case SERVICE_FINAL_SIGTERM:
2537 case SERVICE_FINAL_SIGKILL:
2538 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2539 service_enter_dead(s, SERVICE_SUCCESS, true);
2540
2541 break;
2542
2543 default:
2544 ;
2545 }
2546 }
2547
2548 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2549 Service *s = SERVICE(u);
2550 ServiceResult f;
2551
2552 assert(s);
2553 assert(pid >= 0);
2554
2555 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2556 is_clean_exit_lsb(code, status, &s->success_status))
2557 f = SERVICE_SUCCESS;
2558 else if (code == CLD_EXITED)
2559 f = SERVICE_FAILURE_EXIT_CODE;
2560 else if (code == CLD_KILLED)
2561 f = SERVICE_FAILURE_SIGNAL;
2562 else if (code == CLD_DUMPED)
2563 f = SERVICE_FAILURE_CORE_DUMP;
2564 else
2565 assert_not_reached("Unknown code");
2566
2567 if (s->main_pid == pid) {
2568 /* Forking services may occasionally move to a new PID.
2569 * As long as they update the PID file before exiting the old
2570 * PID, they're fine. */
2571 if (service_load_pid_file(s, false) == 0)
2572 return;
2573
2574 s->main_pid = 0;
2575 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2576
2577 if (s->main_command) {
2578 /* If this is not a forking service than the
2579 * main process got started and hence we copy
2580 * the exit status so that it is recorded both
2581 * as main and as control process exit
2582 * status */
2583
2584 s->main_command->exec_status = s->main_exec_status;
2585
2586 if (s->main_command->ignore)
2587 f = SERVICE_SUCCESS;
2588 } else if (s->exec_command[SERVICE_EXEC_START]) {
2589
2590 /* If this is a forked process, then we should
2591 * ignore the return value if this was
2592 * configured for the starter process */
2593
2594 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2595 f = SERVICE_SUCCESS;
2596 }
2597
2598 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2599 LOG_UNIT_ID(u),
2600 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2601 sigchld_code_to_string(code), status,
2602 strna(code == CLD_EXITED
2603 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2604 : signal_to_string(status))),
2605 "EXIT_CODE=%s", sigchld_code_to_string(code),
2606 "EXIT_STATUS=%i", status,
2607 NULL);
2608
2609 if (f != SERVICE_SUCCESS)
2610 s->result = f;
2611
2612 if (s->main_command &&
2613 s->main_command->command_next &&
2614 f == SERVICE_SUCCESS) {
2615
2616 /* There is another command to *
2617 * execute, so let's do that. */
2618
2619 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2620 service_run_next_main(s);
2621
2622 } else {
2623
2624 /* The service exited, so the service is officially
2625 * gone. */
2626 s->main_command = NULL;
2627
2628 switch (s->state) {
2629
2630 case SERVICE_START_POST:
2631 case SERVICE_RELOAD:
2632 case SERVICE_STOP:
2633 /* Need to wait until the operation is
2634 * done */
2635 break;
2636
2637 case SERVICE_START:
2638 if (s->type == SERVICE_ONESHOT) {
2639 /* This was our main goal, so let's go on */
2640 if (f == SERVICE_SUCCESS)
2641 service_enter_start_post(s);
2642 else
2643 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2644 break;
2645 }
2646
2647 /* Fall through */
2648
2649 case SERVICE_RUNNING:
2650 service_enter_running(s, f);
2651 break;
2652
2653 case SERVICE_STOP_SIGABRT:
2654 case SERVICE_STOP_SIGTERM:
2655 case SERVICE_STOP_SIGKILL:
2656
2657 if (!control_pid_good(s))
2658 service_enter_stop_post(s, f);
2659
2660 /* If there is still a control process, wait for that first */
2661 break;
2662
2663 case SERVICE_STOP_POST:
2664 case SERVICE_FINAL_SIGTERM:
2665 case SERVICE_FINAL_SIGKILL:
2666
2667 if (!control_pid_good(s))
2668 service_enter_dead(s, f, true);
2669 break;
2670
2671 default:
2672 assert_not_reached("Uh, main process died at wrong time.");
2673 }
2674 }
2675
2676 } else if (s->control_pid == pid) {
2677 s->control_pid = 0;
2678
2679 if (s->control_command) {
2680 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2681
2682 if (s->control_command->ignore)
2683 f = SERVICE_SUCCESS;
2684 }
2685
2686 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
2687 "Control process exited, code=%s status=%i",
2688 sigchld_code_to_string(code), status);
2689
2690 if (f != SERVICE_SUCCESS)
2691 s->result = f;
2692
2693 /* Immediately get rid of the cgroup, so that the
2694 * kernel doesn't delay the cgroup empty messages for
2695 * the service cgroup any longer than necessary */
2696 service_kill_control_processes(s);
2697
2698 if (s->control_command &&
2699 s->control_command->command_next &&
2700 f == SERVICE_SUCCESS) {
2701
2702 /* There is another command to *
2703 * execute, so let's do that. */
2704
2705 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
2706 service_run_next_control(s);
2707
2708 } else {
2709 /* No further commands for this step, so let's
2710 * figure out what to do next */
2711
2712 s->control_command = NULL;
2713 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2714
2715 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
2716
2717 switch (s->state) {
2718
2719 case SERVICE_START_PRE:
2720 if (f == SERVICE_SUCCESS)
2721 service_enter_start(s);
2722 else
2723 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2724 break;
2725
2726 case SERVICE_START:
2727 if (s->type != SERVICE_FORKING)
2728 /* Maybe spurious event due to a reload that changed the type? */
2729 break;
2730
2731 if (f != SERVICE_SUCCESS) {
2732 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2733 break;
2734 }
2735
2736 if (s->pid_file) {
2737 bool has_start_post;
2738 int r;
2739
2740 /* Let's try to load the pid file here if we can.
2741 * The PID file might actually be created by a START_POST
2742 * script. In that case don't worry if the loading fails. */
2743
2744 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2745 r = service_load_pid_file(s, !has_start_post);
2746 if (!has_start_post && r < 0) {
2747 r = service_demand_pid_file(s);
2748 if (r < 0 || !cgroup_good(s))
2749 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2750 break;
2751 }
2752 } else
2753 service_search_main_pid(s);
2754
2755 service_enter_start_post(s);
2756 break;
2757
2758 case SERVICE_START_POST:
2759 if (f != SERVICE_SUCCESS) {
2760 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2761 break;
2762 }
2763
2764 if (s->pid_file) {
2765 int r;
2766
2767 r = service_load_pid_file(s, true);
2768 if (r < 0) {
2769 r = service_demand_pid_file(s);
2770 if (r < 0 || !cgroup_good(s))
2771 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2772 break;
2773 }
2774 } else
2775 service_search_main_pid(s);
2776
2777 service_enter_running(s, SERVICE_SUCCESS);
2778 break;
2779
2780 case SERVICE_RELOAD:
2781 if (f == SERVICE_SUCCESS)
2782 if (service_load_pid_file(s, true) < 0)
2783 service_search_main_pid(s);
2784
2785 s->reload_result = f;
2786 service_enter_running(s, SERVICE_SUCCESS);
2787 break;
2788
2789 case SERVICE_STOP:
2790 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2791 break;
2792
2793 case SERVICE_STOP_SIGABRT:
2794 case SERVICE_STOP_SIGTERM:
2795 case SERVICE_STOP_SIGKILL:
2796 if (main_pid_good(s) <= 0)
2797 service_enter_stop_post(s, f);
2798
2799 /* If there is still a service
2800 * process around, wait until
2801 * that one quit, too */
2802 break;
2803
2804 case SERVICE_STOP_POST:
2805 case SERVICE_FINAL_SIGTERM:
2806 case SERVICE_FINAL_SIGKILL:
2807 if (main_pid_good(s) <= 0)
2808 service_enter_dead(s, f, true);
2809 break;
2810
2811 default:
2812 assert_not_reached("Uh, control process died at wrong time.");
2813 }
2814 }
2815 }
2816
2817 /* Notify clients about changed exit status */
2818 unit_add_to_dbus_queue(u);
2819
2820 /* We got one SIGCHLD for the service, let's watch all
2821 * processes that are now running of the service, and watch
2822 * that. Among the PIDs we then watch will be children
2823 * reassigned to us, which hopefully allows us to identify
2824 * when all children are gone */
2825 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
2826 unit_watch_all_pids(u);
2827
2828 /* If the PID set is empty now, then let's finish this off
2829 (On unified we use proper notifications) */
2830 if (cg_unified() <= 0 && set_isempty(u->pids))
2831 service_notify_cgroup_empty_event(u);
2832 }
2833
2834 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
2835 Service *s = SERVICE(userdata);
2836
2837 assert(s);
2838 assert(source == s->timer_event_source);
2839
2840 switch (s->state) {
2841
2842 case SERVICE_START_PRE:
2843 case SERVICE_START:
2844 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
2845 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2846 break;
2847
2848 case SERVICE_START_POST:
2849 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
2850 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2851 break;
2852
2853 case SERVICE_RUNNING:
2854 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
2855 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
2856 break;
2857
2858 case SERVICE_RELOAD:
2859 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
2860 service_kill_control_processes(s);
2861 s->reload_result = SERVICE_FAILURE_TIMEOUT;
2862 service_enter_running(s, SERVICE_SUCCESS);
2863 break;
2864
2865 case SERVICE_STOP:
2866 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
2867 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2868 break;
2869
2870 case SERVICE_STOP_SIGABRT:
2871 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
2872 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2873 break;
2874
2875 case SERVICE_STOP_SIGTERM:
2876 if (s->kill_context.send_sigkill) {
2877 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
2878 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2879 } else {
2880 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
2881 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2882 }
2883
2884 break;
2885
2886 case SERVICE_STOP_SIGKILL:
2887 /* Uh, we sent a SIGKILL and it is still not gone?
2888 * Must be something we cannot kill, so let's just be
2889 * weirded out and continue */
2890
2891 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
2892 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2893 break;
2894
2895 case SERVICE_STOP_POST:
2896 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
2897 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2898 break;
2899
2900 case SERVICE_FINAL_SIGTERM:
2901 if (s->kill_context.send_sigkill) {
2902 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
2903 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2904 } else {
2905 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
2906 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
2907 }
2908
2909 break;
2910
2911 case SERVICE_FINAL_SIGKILL:
2912 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
2913 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
2914 break;
2915
2916 case SERVICE_AUTO_RESTART:
2917 log_unit_info(UNIT(s),
2918 s->restart_usec > 0 ?
2919 "Service hold-off time over, scheduling restart." :
2920 "Service has no hold-off time, scheduling restart.");
2921 service_enter_restart(s);
2922 break;
2923
2924 default:
2925 assert_not_reached("Timeout at wrong time.");
2926 }
2927
2928 return 0;
2929 }
2930
2931 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
2932 Service *s = SERVICE(userdata);
2933 char t[FORMAT_TIMESPAN_MAX];
2934 usec_t watchdog_usec;
2935
2936 assert(s);
2937 assert(source == s->watchdog_event_source);
2938
2939 watchdog_usec = service_get_watchdog_usec(s);
2940
2941 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
2942 format_timespan(t, sizeof(t), watchdog_usec, 1));
2943
2944 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
2945
2946 return 0;
2947 }
2948
2949 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
2950 Service *s = SERVICE(u);
2951 _cleanup_free_ char *cc = NULL;
2952 bool notify_dbus = false;
2953 const char *e;
2954
2955 assert(u);
2956
2957 cc = strv_join(tags, ", ");
2958
2959 if (s->notify_access == NOTIFY_NONE) {
2960 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
2961 return;
2962 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2963 if (s->main_pid != 0)
2964 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
2965 else
2966 log_unit_debug(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
2967 return;
2968 } else
2969 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
2970
2971 /* Interpret MAINPID= */
2972 e = strv_find_startswith(tags, "MAINPID=");
2973 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
2974 if (parse_pid(e, &pid) < 0)
2975 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
2976 else {
2977 service_set_main_pid(s, pid);
2978 unit_watch_pid(UNIT(s), pid);
2979 notify_dbus = true;
2980 }
2981 }
2982
2983 /* Interpret RELOADING= */
2984 if (strv_find(tags, "RELOADING=1")) {
2985
2986 s->notify_state = NOTIFY_RELOADING;
2987
2988 if (s->state == SERVICE_RUNNING)
2989 service_enter_reload_by_notify(s);
2990
2991 notify_dbus = true;
2992 }
2993
2994 /* Interpret READY= */
2995 if (strv_find(tags, "READY=1")) {
2996
2997 s->notify_state = NOTIFY_READY;
2998
2999 /* Type=notify services inform us about completed
3000 * initialization with READY=1 */
3001 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3002 service_enter_start_post(s);
3003
3004 /* Sending READY=1 while we are reloading informs us
3005 * that the reloading is complete */
3006 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3007 service_enter_running(s, SERVICE_SUCCESS);
3008
3009 notify_dbus = true;
3010 }
3011
3012 /* Interpret STOPPING= */
3013 if (strv_find(tags, "STOPPING=1")) {
3014
3015 s->notify_state = NOTIFY_STOPPING;
3016
3017 if (s->state == SERVICE_RUNNING)
3018 service_enter_stop_by_notify(s);
3019
3020 notify_dbus = true;
3021 }
3022
3023 /* Interpret STATUS= */
3024 e = strv_find_startswith(tags, "STATUS=");
3025 if (e) {
3026 _cleanup_free_ char *t = NULL;
3027
3028 if (!isempty(e)) {
3029 if (!utf8_is_valid(e))
3030 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3031 else {
3032 t = strdup(e);
3033 if (!t)
3034 log_oom();
3035 }
3036 }
3037
3038 if (!streq_ptr(s->status_text, t)) {
3039
3040 free(s->status_text);
3041 s->status_text = t;
3042 t = NULL;
3043
3044 notify_dbus = true;
3045 }
3046 }
3047
3048 /* Interpret ERRNO= */
3049 e = strv_find_startswith(tags, "ERRNO=");
3050 if (e) {
3051 int status_errno;
3052
3053 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3054 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3055 else {
3056 if (s->status_errno != status_errno) {
3057 s->status_errno = status_errno;
3058 notify_dbus = true;
3059 }
3060 }
3061 }
3062
3063 /* Interpret WATCHDOG= */
3064 if (strv_find(tags, "WATCHDOG=1"))
3065 service_reset_watchdog(s);
3066
3067 if (strv_find(tags, "FDSTORE=1")) {
3068 const char *name;
3069
3070 name = strv_find_startswith(tags, "FDNAME=");
3071 if (name && !fdname_is_valid(name)) {
3072 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3073 name = NULL;
3074 }
3075
3076 service_add_fd_store_set(s, fds, name);
3077 }
3078
3079 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3080 if (e) {
3081 usec_t watchdog_override_usec;
3082 if (safe_atou64(e, &watchdog_override_usec) < 0)
3083 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3084 else
3085 service_reset_watchdog_timeout(s, watchdog_override_usec);
3086 }
3087
3088 /* Notify clients about changed status or main pid */
3089 if (notify_dbus)
3090 unit_add_to_dbus_queue(u);
3091 }
3092
3093 static int service_get_timeout(Unit *u, usec_t *timeout) {
3094 Service *s = SERVICE(u);
3095 uint64_t t;
3096 int r;
3097
3098 if (!s->timer_event_source)
3099 return 0;
3100
3101 r = sd_event_source_get_time(s->timer_event_source, &t);
3102 if (r < 0)
3103 return r;
3104 if (t == USEC_INFINITY)
3105 return 0;
3106
3107 *timeout = t;
3108 return 1;
3109 }
3110
3111 static void service_bus_name_owner_change(
3112 Unit *u,
3113 const char *name,
3114 const char *old_owner,
3115 const char *new_owner) {
3116
3117 Service *s = SERVICE(u);
3118 int r;
3119
3120 assert(s);
3121 assert(name);
3122
3123 assert(streq(s->bus_name, name));
3124 assert(old_owner || new_owner);
3125
3126 if (old_owner && new_owner)
3127 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3128 else if (old_owner)
3129 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3130 else
3131 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3132
3133 s->bus_name_good = !!new_owner;
3134
3135 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3136 r = free_and_strdup(&s->bus_name_owner, new_owner);
3137 if (r < 0) {
3138 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3139 return;
3140 }
3141
3142 if (s->type == SERVICE_DBUS) {
3143
3144 /* service_enter_running() will figure out what to
3145 * do */
3146 if (s->state == SERVICE_RUNNING)
3147 service_enter_running(s, SERVICE_SUCCESS);
3148 else if (s->state == SERVICE_START && new_owner)
3149 service_enter_start_post(s);
3150
3151 } else if (new_owner &&
3152 s->main_pid <= 0 &&
3153 (s->state == SERVICE_START ||
3154 s->state == SERVICE_START_POST ||
3155 s->state == SERVICE_RUNNING ||
3156 s->state == SERVICE_RELOAD)) {
3157
3158 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3159 pid_t pid;
3160
3161 /* Try to acquire PID from bus service */
3162
3163 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3164 if (r >= 0)
3165 r = sd_bus_creds_get_pid(creds, &pid);
3166 if (r >= 0) {
3167 log_unit_debug(u, "D-Bus name %s is now owned by process %u", name, (unsigned) pid);
3168
3169 service_set_main_pid(s, pid);
3170 unit_watch_pid(UNIT(s), pid);
3171 }
3172 }
3173 }
3174
3175 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3176 _cleanup_free_ char *peer = NULL;
3177 int r;
3178
3179 assert(s);
3180 assert(fd >= 0);
3181
3182 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3183 * to be configured. We take ownership of the passed fd on success. */
3184
3185 if (UNIT(s)->load_state != UNIT_LOADED)
3186 return -EINVAL;
3187
3188 if (s->socket_fd >= 0)
3189 return -EBUSY;
3190
3191 if (s->state != SERVICE_DEAD)
3192 return -EAGAIN;
3193
3194 if (getpeername_pretty(fd, true, &peer) >= 0) {
3195
3196 if (UNIT(s)->description) {
3197 _cleanup_free_ char *a;
3198
3199 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3200 if (!a)
3201 return -ENOMEM;
3202
3203 r = unit_set_description(UNIT(s), a);
3204 } else
3205 r = unit_set_description(UNIT(s), peer);
3206
3207 if (r < 0)
3208 return r;
3209 }
3210
3211 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3212 if (r < 0)
3213 return r;
3214
3215 s->socket_fd = fd;
3216 s->socket_fd_selinux_context_net = selinux_context_net;
3217
3218 unit_ref_set(&s->accept_socket, UNIT(sock));
3219 return 0;
3220 }
3221
3222 static void service_reset_failed(Unit *u) {
3223 Service *s = SERVICE(u);
3224
3225 assert(s);
3226
3227 if (s->state == SERVICE_FAILED)
3228 service_set_state(s, SERVICE_DEAD);
3229
3230 s->result = SERVICE_SUCCESS;
3231 s->reload_result = SERVICE_SUCCESS;
3232 }
3233
3234 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3235 Service *s = SERVICE(u);
3236
3237 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3238 }
3239
3240 static int service_main_pid(Unit *u) {
3241 Service *s = SERVICE(u);
3242
3243 assert(s);
3244
3245 return s->main_pid;
3246 }
3247
3248 static int service_control_pid(Unit *u) {
3249 Service *s = SERVICE(u);
3250
3251 assert(s);
3252
3253 return s->control_pid;
3254 }
3255
3256 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3257 [SERVICE_RESTART_NO] = "no",
3258 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3259 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3260 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3261 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3262 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3263 [SERVICE_RESTART_ALWAYS] = "always",
3264 };
3265
3266 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3267
3268 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3269 [SERVICE_SIMPLE] = "simple",
3270 [SERVICE_FORKING] = "forking",
3271 [SERVICE_ONESHOT] = "oneshot",
3272 [SERVICE_DBUS] = "dbus",
3273 [SERVICE_NOTIFY] = "notify",
3274 [SERVICE_IDLE] = "idle"
3275 };
3276
3277 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3278
3279 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3280 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3281 [SERVICE_EXEC_START] = "ExecStart",
3282 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3283 [SERVICE_EXEC_RELOAD] = "ExecReload",
3284 [SERVICE_EXEC_STOP] = "ExecStop",
3285 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3286 };
3287
3288 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3289
3290 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3291 [NOTIFY_NONE] = "none",
3292 [NOTIFY_MAIN] = "main",
3293 [NOTIFY_ALL] = "all"
3294 };
3295
3296 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3297
3298 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3299 [NOTIFY_UNKNOWN] = "unknown",
3300 [NOTIFY_READY] = "ready",
3301 [NOTIFY_RELOADING] = "reloading",
3302 [NOTIFY_STOPPING] = "stopping",
3303 };
3304
3305 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3306
3307 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3308 [SERVICE_SUCCESS] = "success",
3309 [SERVICE_FAILURE_RESOURCES] = "resources",
3310 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3311 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3312 [SERVICE_FAILURE_SIGNAL] = "signal",
3313 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3314 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3315 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3316 };
3317
3318 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3319
3320 const UnitVTable service_vtable = {
3321 .object_size = sizeof(Service),
3322 .exec_context_offset = offsetof(Service, exec_context),
3323 .cgroup_context_offset = offsetof(Service, cgroup_context),
3324 .kill_context_offset = offsetof(Service, kill_context),
3325 .exec_runtime_offset = offsetof(Service, exec_runtime),
3326
3327 .sections =
3328 "Unit\0"
3329 "Service\0"
3330 "Install\0",
3331 .private_section = "Service",
3332
3333 .init = service_init,
3334 .done = service_done,
3335 .load = service_load,
3336 .release_resources = service_release_resources,
3337
3338 .coldplug = service_coldplug,
3339
3340 .dump = service_dump,
3341
3342 .start = service_start,
3343 .stop = service_stop,
3344 .reload = service_reload,
3345
3346 .can_reload = service_can_reload,
3347
3348 .kill = service_kill,
3349
3350 .serialize = service_serialize,
3351 .deserialize_item = service_deserialize_item,
3352
3353 .active_state = service_active_state,
3354 .sub_state_to_string = service_sub_state_to_string,
3355
3356 .check_gc = service_check_gc,
3357
3358 .sigchld_event = service_sigchld_event,
3359
3360 .reset_failed = service_reset_failed,
3361
3362 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3363 .notify_message = service_notify_message,
3364
3365 .main_pid = service_main_pid,
3366 .control_pid = service_control_pid,
3367
3368 .bus_name_owner_change = service_bus_name_owner_change,
3369
3370 .bus_vtable = bus_service_vtable,
3371 .bus_set_property = bus_service_set_property,
3372 .bus_commit_properties = bus_service_commit_properties,
3373
3374 .get_timeout = service_get_timeout,
3375 .can_transient = true,
3376
3377 .status_message_formats = {
3378 .starting_stopping = {
3379 [0] = "Starting %s...",
3380 [1] = "Stopping %s...",
3381 },
3382 .finished_start_job = {
3383 [JOB_DONE] = "Started %s.",
3384 [JOB_FAILED] = "Failed to start %s.",
3385 },
3386 .finished_stop_job = {
3387 [JOB_DONE] = "Stopped %s.",
3388 [JOB_FAILED] = "Stopped (with error) %s.",
3389 },
3390 },
3391 };
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