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Merge pull request #3865 from poettering/remove-ipc
[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 dynamic_creds_unref(&s->dynamic_creds);
326
327 exit_status_set_free(&s->restart_prevent_status);
328 exit_status_set_free(&s->restart_force_status);
329 exit_status_set_free(&s->success_status);
330
331 /* This will leak a process, but at least no memory or any of
332 * our resources */
333 service_unwatch_main_pid(s);
334 service_unwatch_control_pid(s);
335 service_unwatch_pid_file(s);
336
337 if (s->bus_name) {
338 unit_unwatch_bus_name(u, s->bus_name);
339 s->bus_name = mfree(s->bus_name);
340 }
341
342 s->bus_name_owner = mfree(s->bus_name_owner);
343
344 service_close_socket_fd(s);
345 s->peer = socket_peer_unref(s->peer);
346
347 unit_ref_unset(&s->accept_socket);
348
349 service_stop_watchdog(s);
350
351 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
352
353 service_release_resources(u);
354 }
355
356 static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
357 ServiceFDStore *fs = userdata;
358
359 assert(e);
360 assert(fs);
361
362 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
363 service_fd_store_unlink(fs);
364 return 0;
365 }
366
367 static int service_add_fd_store(Service *s, int fd, const char *name) {
368 ServiceFDStore *fs;
369 int r;
370
371 assert(s);
372 assert(fd >= 0);
373
374 if (s->n_fd_store >= s->n_fd_store_max)
375 return 0;
376
377 LIST_FOREACH(fd_store, fs, s->fd_store) {
378 r = same_fd(fs->fd, fd);
379 if (r < 0)
380 return r;
381 if (r > 0) {
382 /* Already included */
383 safe_close(fd);
384 return 1;
385 }
386 }
387
388 fs = new0(ServiceFDStore, 1);
389 if (!fs)
390 return -ENOMEM;
391
392 fs->fd = fd;
393 fs->service = s;
394 fs->fdname = strdup(name ?: "stored");
395 if (!fs->fdname) {
396 free(fs);
397 return -ENOMEM;
398 }
399
400 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
401 if (r < 0) {
402 free(fs->fdname);
403 free(fs);
404 return r;
405 }
406
407 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
408
409 LIST_PREPEND(fd_store, s->fd_store, fs);
410 s->n_fd_store++;
411
412 return 1;
413 }
414
415 static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
416 int r;
417
418 assert(s);
419
420 if (fdset_size(fds) <= 0)
421 return 0;
422
423 while (s->n_fd_store < s->n_fd_store_max) {
424 _cleanup_close_ int fd = -1;
425
426 fd = fdset_steal_first(fds);
427 if (fd < 0)
428 break;
429
430 r = service_add_fd_store(s, fd, name);
431 if (r < 0)
432 return log_unit_error_errno(UNIT(s), r, "Couldn't add fd to fd store: %m");
433 if (r > 0) {
434 log_unit_debug(UNIT(s), "Added fd to fd store.");
435 fd = -1;
436 }
437 }
438
439 if (fdset_size(fds) > 0)
440 log_unit_warning(UNIT(s), "Tried to store more fds than FileDescriptorStoreMax=%u allows, closing remaining.", s->n_fd_store_max);
441
442 return 0;
443 }
444
445 static int service_arm_timer(Service *s, usec_t usec) {
446 int r;
447
448 assert(s);
449
450 if (s->timer_event_source) {
451 r = sd_event_source_set_time(s->timer_event_source, usec);
452 if (r < 0)
453 return r;
454
455 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
456 }
457
458 if (usec == USEC_INFINITY)
459 return 0;
460
461 r = sd_event_add_time(
462 UNIT(s)->manager->event,
463 &s->timer_event_source,
464 CLOCK_MONOTONIC,
465 usec, 0,
466 service_dispatch_timer, s);
467 if (r < 0)
468 return r;
469
470 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
471
472 return 0;
473 }
474
475 static int service_verify(Service *s) {
476 assert(s);
477
478 if (UNIT(s)->load_state != UNIT_LOADED)
479 return 0;
480
481 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
482 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
483 return -EINVAL;
484 }
485
486 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
487 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
488 return -EINVAL;
489 }
490
491 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
492 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
493 return -EINVAL;
494 }
495
496 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
497 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
498 return -EINVAL;
499 }
500
501 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
502 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
503 return -EINVAL;
504 }
505
506 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
507 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
508 return -EINVAL;
509 }
510
511 if (s->type == SERVICE_DBUS && !s->bus_name) {
512 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
513 return -EINVAL;
514 }
515
516 if (s->bus_name && s->type != SERVICE_DBUS)
517 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
518
519 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
520 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
521 return -EINVAL;
522 }
523
524 if (s->usb_function_descriptors && !s->usb_function_strings)
525 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
526
527 if (!s->usb_function_descriptors && s->usb_function_strings)
528 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
529
530 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
531 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
532
533 return 0;
534 }
535
536 static int service_add_default_dependencies(Service *s) {
537 int r;
538
539 assert(s);
540
541 if (!UNIT(s)->default_dependencies)
542 return 0;
543
544 /* Add a number of automatic dependencies useful for the
545 * majority of services. */
546
547 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
548 /* First, pull in the really early boot stuff, and
549 * require it, so that we fail if we can't acquire
550 * it. */
551
552 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
553 if (r < 0)
554 return r;
555 } else {
556
557 /* In the --user instance there's no sysinit.target,
558 * in that case require basic.target instead. */
559
560 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
561 if (r < 0)
562 return r;
563 }
564
565 /* Second, if the rest of the base system is in the same
566 * transaction, order us after it, but do not pull it in or
567 * even require it. */
568 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
569 if (r < 0)
570 return r;
571
572 /* Third, add us in for normal shutdown. */
573 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
574 }
575
576 static void service_fix_output(Service *s) {
577 assert(s);
578
579 /* If nothing has been explicitly configured, patch default
580 * output in. If input is socket/tty we avoid this however,
581 * since in that case we want output to default to the same
582 * place as we read input from. */
583
584 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
585 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
586 s->exec_context.std_input == EXEC_INPUT_NULL)
587 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
588
589 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
590 s->exec_context.std_input == EXEC_INPUT_NULL)
591 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
592 }
593
594 static int service_setup_bus_name(Service *s) {
595 int r;
596
597 assert(s);
598
599 if (!s->bus_name)
600 return 0;
601
602 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
603 if (r < 0)
604 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
605
606 /* Regardless if kdbus is used or not, we always want to be ordered against dbus.socket if both are in the transaction. */
607 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
608 if (r < 0)
609 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
610
611 r = unit_watch_bus_name(UNIT(s), s->bus_name);
612 if (r == -EEXIST)
613 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
614 if (r < 0)
615 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
616
617 return 0;
618 }
619
620 static int service_add_extras(Service *s) {
621 int r;
622
623 assert(s);
624
625 if (s->type == _SERVICE_TYPE_INVALID) {
626 /* Figure out a type automatically */
627 if (s->bus_name)
628 s->type = SERVICE_DBUS;
629 else if (s->exec_command[SERVICE_EXEC_START])
630 s->type = SERVICE_SIMPLE;
631 else
632 s->type = SERVICE_ONESHOT;
633 }
634
635 /* Oneshot services have disabled start timeout by default */
636 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
637 s->timeout_start_usec = USEC_INFINITY;
638
639 service_fix_output(s);
640
641 r = unit_patch_contexts(UNIT(s));
642 if (r < 0)
643 return r;
644
645 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
646 if (r < 0)
647 return r;
648
649 r = unit_set_default_slice(UNIT(s));
650 if (r < 0)
651 return r;
652
653 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
654 s->notify_access = NOTIFY_MAIN;
655
656 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
657 s->notify_access = NOTIFY_MAIN;
658
659 r = service_add_default_dependencies(s);
660 if (r < 0)
661 return r;
662
663 r = service_setup_bus_name(s);
664 if (r < 0)
665 return r;
666
667 return 0;
668 }
669
670 static int service_load(Unit *u) {
671 Service *s = SERVICE(u);
672 int r;
673
674 assert(s);
675
676 /* Load a .service file */
677 r = unit_load_fragment(u);
678 if (r < 0)
679 return r;
680
681 /* Still nothing found? Then let's give up */
682 if (u->load_state == UNIT_STUB)
683 return -ENOENT;
684
685 /* This is a new unit? Then let's add in some extras */
686 if (u->load_state == UNIT_LOADED) {
687
688 /* We were able to load something, then let's add in
689 * the dropin directories. */
690 r = unit_load_dropin(u);
691 if (r < 0)
692 return r;
693
694 /* This is a new unit? Then let's add in some
695 * extras */
696 r = service_add_extras(s);
697 if (r < 0)
698 return r;
699 }
700
701 return service_verify(s);
702 }
703
704 static void service_dump(Unit *u, FILE *f, const char *prefix) {
705 ServiceExecCommand c;
706 Service *s = SERVICE(u);
707 const char *prefix2;
708
709 assert(s);
710
711 prefix = strempty(prefix);
712 prefix2 = strjoina(prefix, "\t");
713
714 fprintf(f,
715 "%sService State: %s\n"
716 "%sResult: %s\n"
717 "%sReload Result: %s\n"
718 "%sPermissionsStartOnly: %s\n"
719 "%sRootDirectoryStartOnly: %s\n"
720 "%sRemainAfterExit: %s\n"
721 "%sGuessMainPID: %s\n"
722 "%sType: %s\n"
723 "%sRestart: %s\n"
724 "%sNotifyAccess: %s\n"
725 "%sNotifyState: %s\n",
726 prefix, service_state_to_string(s->state),
727 prefix, service_result_to_string(s->result),
728 prefix, service_result_to_string(s->reload_result),
729 prefix, yes_no(s->permissions_start_only),
730 prefix, yes_no(s->root_directory_start_only),
731 prefix, yes_no(s->remain_after_exit),
732 prefix, yes_no(s->guess_main_pid),
733 prefix, service_type_to_string(s->type),
734 prefix, service_restart_to_string(s->restart),
735 prefix, notify_access_to_string(s->notify_access),
736 prefix, notify_state_to_string(s->notify_state));
737
738 if (s->control_pid > 0)
739 fprintf(f,
740 "%sControl PID: "PID_FMT"\n",
741 prefix, s->control_pid);
742
743 if (s->main_pid > 0)
744 fprintf(f,
745 "%sMain PID: "PID_FMT"\n"
746 "%sMain PID Known: %s\n"
747 "%sMain PID Alien: %s\n",
748 prefix, s->main_pid,
749 prefix, yes_no(s->main_pid_known),
750 prefix, yes_no(s->main_pid_alien));
751
752 if (s->pid_file)
753 fprintf(f,
754 "%sPIDFile: %s\n",
755 prefix, s->pid_file);
756
757 if (s->bus_name)
758 fprintf(f,
759 "%sBusName: %s\n"
760 "%sBus Name Good: %s\n",
761 prefix, s->bus_name,
762 prefix, yes_no(s->bus_name_good));
763
764 if (UNIT_ISSET(s->accept_socket))
765 fprintf(f,
766 "%sAccept Socket: %s\n",
767 prefix, UNIT_DEREF(s->accept_socket)->id);
768
769 kill_context_dump(&s->kill_context, f, prefix);
770 exec_context_dump(&s->exec_context, f, prefix);
771
772 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
773
774 if (!s->exec_command[c])
775 continue;
776
777 fprintf(f, "%s-> %s:\n",
778 prefix, service_exec_command_to_string(c));
779
780 exec_command_dump_list(s->exec_command[c], f, prefix2);
781 }
782
783 if (s->status_text)
784 fprintf(f, "%sStatus Text: %s\n",
785 prefix, s->status_text);
786
787 if (s->n_fd_store_max > 0)
788 fprintf(f,
789 "%sFile Descriptor Store Max: %u\n"
790 "%sFile Descriptor Store Current: %u\n",
791 prefix, s->n_fd_store_max,
792 prefix, s->n_fd_store);
793 }
794
795 static int service_load_pid_file(Service *s, bool may_warn) {
796 _cleanup_free_ char *k = NULL;
797 int r;
798 pid_t pid;
799
800 assert(s);
801
802 if (!s->pid_file)
803 return -ENOENT;
804
805 r = read_one_line_file(s->pid_file, &k);
806 if (r < 0) {
807 if (may_warn)
808 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));
809 return r;
810 }
811
812 r = parse_pid(k, &pid);
813 if (r < 0) {
814 if (may_warn)
815 log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
816 return r;
817 }
818
819 if (!pid_is_alive(pid)) {
820 if (may_warn)
821 log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
822 return -ESRCH;
823 }
824
825 if (s->main_pid_known) {
826 if (pid == s->main_pid)
827 return 0;
828
829 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
830
831 service_unwatch_main_pid(s);
832 s->main_pid_known = false;
833 } else
834 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
835
836 r = service_set_main_pid(s, pid);
837 if (r < 0)
838 return r;
839
840 r = unit_watch_pid(UNIT(s), pid);
841 if (r < 0) {
842 /* FIXME: we need to do something here */
843 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
844 return r;
845 }
846
847 return 0;
848 }
849
850 static void service_search_main_pid(Service *s) {
851 pid_t pid = 0;
852 int r;
853
854 assert(s);
855
856 /* If we know it anyway, don't ever fallback to unreliable
857 * heuristics */
858 if (s->main_pid_known)
859 return;
860
861 if (!s->guess_main_pid)
862 return;
863
864 assert(s->main_pid <= 0);
865
866 if (unit_search_main_pid(UNIT(s), &pid) < 0)
867 return;
868
869 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
870 if (service_set_main_pid(s, pid) < 0)
871 return;
872
873 r = unit_watch_pid(UNIT(s), pid);
874 if (r < 0)
875 /* FIXME: we need to do something here */
876 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
877 }
878
879 static void service_set_state(Service *s, ServiceState state) {
880 ServiceState old_state;
881 const UnitActiveState *table;
882
883 assert(s);
884
885 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
886
887 old_state = s->state;
888 s->state = state;
889
890 service_unwatch_pid_file(s);
891
892 if (!IN_SET(state,
893 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
894 SERVICE_RUNNING,
895 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_AUTO_RESTART))
899 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
900
901 if (!IN_SET(state,
902 SERVICE_START, SERVICE_START_POST,
903 SERVICE_RUNNING, SERVICE_RELOAD,
904 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
905 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
906 service_unwatch_main_pid(s);
907 s->main_command = NULL;
908 }
909
910 if (!IN_SET(state,
911 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
912 SERVICE_RELOAD,
913 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
914 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
915 service_unwatch_control_pid(s);
916 s->control_command = NULL;
917 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
918 }
919
920 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
921 unit_unwatch_all_pids(UNIT(s));
922
923 if (!IN_SET(state,
924 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
925 SERVICE_RUNNING, SERVICE_RELOAD,
926 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
927 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
928 !(state == SERVICE_DEAD && UNIT(s)->job))
929 service_close_socket_fd(s);
930
931 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
932 service_stop_watchdog(s);
933
934 /* For the inactive states unit_notify() will trim the cgroup,
935 * but for exit we have to do that ourselves... */
936 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
937 unit_prune_cgroup(UNIT(s));
938
939 /* For remain_after_exit services, let's see if we can "release" the
940 * hold on the console, since unit_notify() only does that in case of
941 * change of state */
942 if (state == SERVICE_EXITED &&
943 s->remain_after_exit &&
944 UNIT(s)->manager->n_on_console > 0) {
945
946 ExecContext *ec;
947
948 ec = unit_get_exec_context(UNIT(s));
949 if (ec && exec_context_may_touch_console(ec)) {
950 Manager *m = UNIT(s)->manager;
951
952 m->n_on_console--;
953 if (m->n_on_console == 0)
954 /* unset no_console_output flag, since the console is free */
955 m->no_console_output = false;
956 }
957 }
958
959 if (old_state != state)
960 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
961
962 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
963 }
964
965 static usec_t service_coldplug_timeout(Service *s) {
966 assert(s);
967
968 switch (s->deserialized_state) {
969
970 case SERVICE_START_PRE:
971 case SERVICE_START:
972 case SERVICE_START_POST:
973 case SERVICE_RELOAD:
974 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
975
976 case SERVICE_RUNNING:
977 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
978
979 case SERVICE_STOP:
980 case SERVICE_STOP_SIGABRT:
981 case SERVICE_STOP_SIGTERM:
982 case SERVICE_STOP_SIGKILL:
983 case SERVICE_STOP_POST:
984 case SERVICE_FINAL_SIGTERM:
985 case SERVICE_FINAL_SIGKILL:
986 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
987
988 case SERVICE_AUTO_RESTART:
989 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
990
991 default:
992 return USEC_INFINITY;
993 }
994 }
995
996 static int service_coldplug(Unit *u) {
997 Service *s = SERVICE(u);
998 int r;
999
1000 assert(s);
1001 assert(s->state == SERVICE_DEAD);
1002
1003 if (s->deserialized_state == s->state)
1004 return 0;
1005
1006 r = service_arm_timer(s, service_coldplug_timeout(s));
1007 if (r < 0)
1008 return r;
1009
1010 if (s->main_pid > 0 &&
1011 pid_is_unwaited(s->main_pid) &&
1012 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1013 IN_SET(s->deserialized_state,
1014 SERVICE_START, SERVICE_START_POST,
1015 SERVICE_RUNNING, SERVICE_RELOAD,
1016 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1017 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1018 r = unit_watch_pid(UNIT(s), s->main_pid);
1019 if (r < 0)
1020 return r;
1021 }
1022
1023 if (s->control_pid > 0 &&
1024 pid_is_unwaited(s->control_pid) &&
1025 IN_SET(s->deserialized_state,
1026 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1027 SERVICE_RELOAD,
1028 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1029 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1030 r = unit_watch_pid(UNIT(s), s->control_pid);
1031 if (r < 0)
1032 return r;
1033 }
1034
1035 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1036 unit_watch_all_pids(UNIT(s));
1037
1038 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1039 service_start_watchdog(s);
1040
1041 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1042 (void) unit_setup_dynamic_creds(u);
1043
1044 if (UNIT_ISSET(s->accept_socket)) {
1045 Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket));
1046
1047 if (socket->max_connections_per_source > 0) {
1048 SocketPeer *peer;
1049
1050 /* Make a best-effort attempt at bumping the connection count */
1051 if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) {
1052 socket_peer_unref(s->peer);
1053 s->peer = peer;
1054 }
1055 }
1056 }
1057
1058 service_set_state(s, s->deserialized_state);
1059 return 0;
1060 }
1061
1062 static int service_collect_fds(Service *s, int **fds, char ***fd_names) {
1063 _cleanup_strv_free_ char **rfd_names = NULL;
1064 _cleanup_free_ int *rfds = NULL;
1065 int rn_fds = 0, r;
1066
1067 assert(s);
1068 assert(fds);
1069 assert(fd_names);
1070
1071 if (s->socket_fd >= 0) {
1072
1073 /* Pass the per-connection socket */
1074
1075 rfds = new(int, 1);
1076 if (!rfds)
1077 return -ENOMEM;
1078 rfds[0] = s->socket_fd;
1079
1080 rfd_names = strv_new("connection", NULL);
1081 if (!rfd_names)
1082 return -ENOMEM;
1083
1084 rn_fds = 1;
1085 } else {
1086 Iterator i;
1087 Unit *u;
1088
1089 /* Pass all our configured sockets for singleton services */
1090
1091 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1092 _cleanup_free_ int *cfds = NULL;
1093 Socket *sock;
1094 int cn_fds;
1095
1096 if (u->type != UNIT_SOCKET)
1097 continue;
1098
1099 sock = SOCKET(u);
1100
1101 cn_fds = socket_collect_fds(sock, &cfds);
1102 if (cn_fds < 0)
1103 return cn_fds;
1104
1105 if (cn_fds <= 0)
1106 continue;
1107
1108 if (!rfds) {
1109 rfds = cfds;
1110 rn_fds = cn_fds;
1111
1112 cfds = NULL;
1113 } else {
1114 int *t;
1115
1116 t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int));
1117 if (!t)
1118 return -ENOMEM;
1119
1120 memcpy(t + rn_fds, cfds, cn_fds * sizeof(int));
1121
1122 rfds = t;
1123 rn_fds += cn_fds;
1124 }
1125
1126 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1127 if (r < 0)
1128 return r;
1129 }
1130 }
1131
1132 if (s->n_fd_store > 0) {
1133 ServiceFDStore *fs;
1134 char **nl;
1135 int *t;
1136
1137 t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int));
1138 if (!t)
1139 return -ENOMEM;
1140
1141 rfds = t;
1142
1143 nl = realloc(rfd_names, (rn_fds + s->n_fd_store + 1) * sizeof(char*));
1144 if (!nl)
1145 return -ENOMEM;
1146
1147 rfd_names = nl;
1148
1149 LIST_FOREACH(fd_store, fs, s->fd_store) {
1150 rfds[rn_fds] = fs->fd;
1151 rfd_names[rn_fds] = strdup(strempty(fs->fdname));
1152 if (!rfd_names[rn_fds])
1153 return -ENOMEM;
1154
1155 rn_fds++;
1156 }
1157
1158 rfd_names[rn_fds] = NULL;
1159 }
1160
1161 *fds = rfds;
1162 *fd_names = rfd_names;
1163
1164 rfds = NULL;
1165 rfd_names = NULL;
1166
1167 return rn_fds;
1168 }
1169
1170 static int service_spawn(
1171 Service *s,
1172 ExecCommand *c,
1173 usec_t timeout,
1174 ExecFlags flags,
1175 pid_t *_pid) {
1176
1177 _cleanup_strv_free_ char **argv = NULL, **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1178 _cleanup_free_ int *fds = NULL;
1179 unsigned n_fds = 0, n_env = 0;
1180 const char *path;
1181 pid_t pid;
1182
1183 ExecParameters exec_params = {
1184 .flags = flags,
1185 .stdin_fd = -1,
1186 .stdout_fd = -1,
1187 .stderr_fd = -1,
1188 };
1189
1190 int r;
1191
1192 assert(s);
1193 assert(c);
1194 assert(_pid);
1195
1196 if (flags & EXEC_IS_CONTROL) {
1197 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1198 if (s->permissions_start_only)
1199 exec_params.flags &= ~EXEC_APPLY_PERMISSIONS;
1200 if (s->root_directory_start_only)
1201 exec_params.flags &= ~EXEC_APPLY_CHROOT;
1202 }
1203
1204 (void) unit_realize_cgroup(UNIT(s));
1205 if (s->reset_cpu_usage) {
1206 (void) unit_reset_cpu_usage(UNIT(s));
1207 s->reset_cpu_usage = false;
1208 }
1209
1210 r = unit_setup_exec_runtime(UNIT(s));
1211 if (r < 0)
1212 return r;
1213
1214 r = unit_setup_dynamic_creds(UNIT(s));
1215 if (r < 0)
1216 return r;
1217
1218 if ((flags & EXEC_PASS_FDS) ||
1219 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1220 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1221 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1222
1223 r = service_collect_fds(s, &fds, &fd_names);
1224 if (r < 0)
1225 return r;
1226
1227 n_fds = r;
1228 }
1229
1230 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1231 if (r < 0)
1232 return r;
1233
1234 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1235 if (r < 0)
1236 return r;
1237
1238 our_env = new0(char*, 9);
1239 if (!our_env)
1240 return -ENOMEM;
1241
1242 if ((flags & EXEC_IS_CONTROL) ? s->notify_access == NOTIFY_ALL : s->notify_access != NOTIFY_NONE)
1243 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1244 return -ENOMEM;
1245
1246 if (s->main_pid > 0)
1247 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1248 return -ENOMEM;
1249
1250 if (MANAGER_IS_USER(UNIT(s)->manager))
1251 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0)
1252 return -ENOMEM;
1253
1254 if (s->socket_fd >= 0) {
1255 union sockaddr_union sa;
1256 socklen_t salen = sizeof(sa);
1257
1258 r = getpeername(s->socket_fd, &sa.sa, &salen);
1259 if (r < 0)
1260 return -errno;
1261
1262 if (IN_SET(sa.sa.sa_family, AF_INET, AF_INET6)) {
1263 _cleanup_free_ char *addr = NULL;
1264 char *t;
1265 int port;
1266
1267 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1268 if (r < 0)
1269 return r;
1270
1271 t = strappend("REMOTE_ADDR=", addr);
1272 if (!t)
1273 return -ENOMEM;
1274 our_env[n_env++] = t;
1275
1276 port = sockaddr_port(&sa.sa);
1277 if (port < 0)
1278 return port;
1279
1280 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1281 return -ENOMEM;
1282 our_env[n_env++] = t;
1283 }
1284 }
1285
1286 if (flags & EXEC_SETENV_RESULT) {
1287 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1288 return -ENOMEM;
1289
1290 if (s->main_exec_status.pid > 0 &&
1291 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1292 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1293 return -ENOMEM;
1294
1295 if (s->main_exec_status.code == CLD_EXITED)
1296 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1297 else
1298 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1299 if (r < 0)
1300 return -ENOMEM;
1301 }
1302 }
1303
1304 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1305 if (!final_env)
1306 return -ENOMEM;
1307
1308 if ((flags & EXEC_IS_CONTROL) && UNIT(s)->cgroup_path) {
1309 path = strjoina(UNIT(s)->cgroup_path, "/control");
1310 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1311 } else
1312 path = UNIT(s)->cgroup_path;
1313
1314 exec_params.argv = argv;
1315 exec_params.environment = final_env;
1316 exec_params.fds = fds;
1317 exec_params.fd_names = fd_names;
1318 exec_params.n_fds = n_fds;
1319 exec_params.flags |= UNIT(s)->manager->confirm_spawn ? EXEC_CONFIRM_SPAWN : 0;
1320 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1321 exec_params.cgroup_path = path;
1322 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1323 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1324 exec_params.watchdog_usec = s->watchdog_usec;
1325 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1326 if (s->type == SERVICE_IDLE)
1327 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1328 exec_params.stdin_fd = s->stdin_fd;
1329 exec_params.stdout_fd = s->stdout_fd;
1330 exec_params.stderr_fd = s->stderr_fd;
1331
1332 r = exec_spawn(UNIT(s),
1333 c,
1334 &s->exec_context,
1335 &exec_params,
1336 s->exec_runtime,
1337 &s->dynamic_creds,
1338 &pid);
1339 if (r < 0)
1340 return r;
1341
1342 r = unit_watch_pid(UNIT(s), pid);
1343 if (r < 0)
1344 /* FIXME: we need to do something here */
1345 return r;
1346
1347 *_pid = pid;
1348
1349 return 0;
1350 }
1351
1352 static int main_pid_good(Service *s) {
1353 assert(s);
1354
1355 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1356 * don't know */
1357
1358 /* If we know the pid file, then let's just check if it is
1359 * still valid */
1360 if (s->main_pid_known) {
1361
1362 /* If it's an alien child let's check if it is still
1363 * alive ... */
1364 if (s->main_pid_alien && s->main_pid > 0)
1365 return pid_is_alive(s->main_pid);
1366
1367 /* .. otherwise assume we'll get a SIGCHLD for it,
1368 * which we really should wait for to collect exit
1369 * status and code */
1370 return s->main_pid > 0;
1371 }
1372
1373 /* We don't know the pid */
1374 return -EAGAIN;
1375 }
1376
1377 _pure_ static int control_pid_good(Service *s) {
1378 assert(s);
1379
1380 return s->control_pid > 0;
1381 }
1382
1383 static int cgroup_good(Service *s) {
1384 int r;
1385
1386 assert(s);
1387
1388 if (!UNIT(s)->cgroup_path)
1389 return 0;
1390
1391 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1392 if (r < 0)
1393 return r;
1394
1395 return !r;
1396 }
1397
1398 static bool service_shall_restart(Service *s) {
1399 assert(s);
1400
1401 /* Don't restart after manual stops */
1402 if (s->forbid_restart)
1403 return false;
1404
1405 /* Never restart if this is configured as special exception */
1406 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1407 return false;
1408
1409 /* Restart if the exit code/status are configured as restart triggers */
1410 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1411 return true;
1412
1413 switch (s->restart) {
1414
1415 case SERVICE_RESTART_NO:
1416 return false;
1417
1418 case SERVICE_RESTART_ALWAYS:
1419 return true;
1420
1421 case SERVICE_RESTART_ON_SUCCESS:
1422 return s->result == SERVICE_SUCCESS;
1423
1424 case SERVICE_RESTART_ON_FAILURE:
1425 return s->result != SERVICE_SUCCESS;
1426
1427 case SERVICE_RESTART_ON_ABNORMAL:
1428 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1429
1430 case SERVICE_RESTART_ON_WATCHDOG:
1431 return s->result == SERVICE_FAILURE_WATCHDOG;
1432
1433 case SERVICE_RESTART_ON_ABORT:
1434 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1435
1436 default:
1437 assert_not_reached("unknown restart setting");
1438 }
1439 }
1440
1441 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1442 int r;
1443 assert(s);
1444
1445 if (s->result == SERVICE_SUCCESS)
1446 s->result = f;
1447
1448 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1449
1450 if (s->result != SERVICE_SUCCESS) {
1451 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1452 failure_action(UNIT(s)->manager, s->failure_action, UNIT(s)->reboot_arg);
1453 }
1454
1455 if (allow_restart && service_shall_restart(s)) {
1456
1457 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1458 if (r < 0)
1459 goto fail;
1460
1461 service_set_state(s, SERVICE_AUTO_RESTART);
1462 }
1463
1464 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1465 s->forbid_restart = false;
1466
1467 /* We want fresh tmpdirs in case service is started again immediately */
1468 exec_runtime_destroy(s->exec_runtime);
1469 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1470
1471 /* Also, remove the runtime directory */
1472 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1473
1474 /* Get rid of the IPC bits of the user */
1475 unit_unref_uid_gid(UNIT(s), true);
1476
1477 /* Release the user, and destroy it if we are the only remaining owner */
1478 dynamic_creds_destroy(&s->dynamic_creds);
1479
1480 /* Try to delete the pid file. At this point it will be
1481 * out-of-date, and some software might be confused by it, so
1482 * let's remove it. */
1483 if (s->pid_file)
1484 (void) unlink(s->pid_file);
1485
1486 return;
1487
1488 fail:
1489 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1490 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1491 }
1492
1493 static void service_enter_stop_post(Service *s, ServiceResult f) {
1494 int r;
1495 assert(s);
1496
1497 if (s->result == SERVICE_SUCCESS)
1498 s->result = f;
1499
1500 service_unwatch_control_pid(s);
1501 unit_watch_all_pids(UNIT(s));
1502
1503 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1504 if (s->control_command) {
1505 s->control_command_id = SERVICE_EXEC_STOP_POST;
1506
1507 r = service_spawn(s,
1508 s->control_command,
1509 s->timeout_stop_usec,
1510 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1511 &s->control_pid);
1512 if (r < 0)
1513 goto fail;
1514
1515 service_set_state(s, SERVICE_STOP_POST);
1516 } else
1517 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1518
1519 return;
1520
1521 fail:
1522 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1523 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1524 }
1525
1526 static int state_to_kill_operation(ServiceState state) {
1527 switch (state) {
1528
1529 case SERVICE_STOP_SIGABRT:
1530 return KILL_ABORT;
1531
1532 case SERVICE_STOP_SIGTERM:
1533 case SERVICE_FINAL_SIGTERM:
1534 return KILL_TERMINATE;
1535
1536 case SERVICE_STOP_SIGKILL:
1537 case SERVICE_FINAL_SIGKILL:
1538 return KILL_KILL;
1539
1540 default:
1541 return _KILL_OPERATION_INVALID;
1542 }
1543 }
1544
1545 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1546 int r;
1547
1548 assert(s);
1549
1550 if (s->result == SERVICE_SUCCESS)
1551 s->result = f;
1552
1553 unit_watch_all_pids(UNIT(s));
1554
1555 r = unit_kill_context(
1556 UNIT(s),
1557 &s->kill_context,
1558 state_to_kill_operation(state),
1559 s->main_pid,
1560 s->control_pid,
1561 s->main_pid_alien);
1562
1563 if (r < 0)
1564 goto fail;
1565
1566 if (r > 0) {
1567 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1568 if (r < 0)
1569 goto fail;
1570
1571 service_set_state(s, state);
1572 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1573 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1574 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1575 service_enter_stop_post(s, SERVICE_SUCCESS);
1576 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1577 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1578 else
1579 service_enter_dead(s, SERVICE_SUCCESS, true);
1580
1581 return;
1582
1583 fail:
1584 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1585
1586 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1587 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1588 else
1589 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1590 }
1591
1592 static void service_enter_stop_by_notify(Service *s) {
1593 assert(s);
1594
1595 unit_watch_all_pids(UNIT(s));
1596
1597 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1598
1599 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1600 service_set_state(s, SERVICE_STOP_SIGTERM);
1601 }
1602
1603 static void service_enter_stop(Service *s, ServiceResult f) {
1604 int r;
1605
1606 assert(s);
1607
1608 if (s->result == SERVICE_SUCCESS)
1609 s->result = f;
1610
1611 service_unwatch_control_pid(s);
1612 unit_watch_all_pids(UNIT(s));
1613
1614 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1615 if (s->control_command) {
1616 s->control_command_id = SERVICE_EXEC_STOP;
1617
1618 r = service_spawn(s,
1619 s->control_command,
1620 s->timeout_stop_usec,
1621 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1622 &s->control_pid);
1623 if (r < 0)
1624 goto fail;
1625
1626 service_set_state(s, SERVICE_STOP);
1627 } else
1628 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1629
1630 return;
1631
1632 fail:
1633 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1634 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1635 }
1636
1637 static bool service_good(Service *s) {
1638 int main_pid_ok;
1639 assert(s);
1640
1641 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1642 return false;
1643
1644 main_pid_ok = main_pid_good(s);
1645 if (main_pid_ok > 0) /* It's alive */
1646 return true;
1647 if (main_pid_ok == 0) /* It's dead */
1648 return false;
1649
1650 /* OK, we don't know anything about the main PID, maybe
1651 * because there is none. Let's check the control group
1652 * instead. */
1653
1654 return cgroup_good(s) != 0;
1655 }
1656
1657 static void service_enter_running(Service *s, ServiceResult f) {
1658 assert(s);
1659
1660 if (s->result == SERVICE_SUCCESS)
1661 s->result = f;
1662
1663 service_unwatch_control_pid(s);
1664
1665 if (service_good(s)) {
1666
1667 /* If there are any queued up sd_notify()
1668 * notifications, process them now */
1669 if (s->notify_state == NOTIFY_RELOADING)
1670 service_enter_reload_by_notify(s);
1671 else if (s->notify_state == NOTIFY_STOPPING)
1672 service_enter_stop_by_notify(s);
1673 else {
1674 service_set_state(s, SERVICE_RUNNING);
1675 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1676 }
1677
1678 } else if (s->remain_after_exit)
1679 service_set_state(s, SERVICE_EXITED);
1680 else
1681 service_enter_stop(s, SERVICE_SUCCESS);
1682 }
1683
1684 static void service_enter_start_post(Service *s) {
1685 int r;
1686 assert(s);
1687
1688 service_unwatch_control_pid(s);
1689 service_reset_watchdog(s);
1690
1691 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1692 if (s->control_command) {
1693 s->control_command_id = SERVICE_EXEC_START_POST;
1694
1695 r = service_spawn(s,
1696 s->control_command,
1697 s->timeout_start_usec,
1698 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1699 &s->control_pid);
1700 if (r < 0)
1701 goto fail;
1702
1703 service_set_state(s, SERVICE_START_POST);
1704 } else
1705 service_enter_running(s, SERVICE_SUCCESS);
1706
1707 return;
1708
1709 fail:
1710 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1711 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1712 }
1713
1714 static void service_kill_control_processes(Service *s) {
1715 char *p;
1716
1717 if (!UNIT(s)->cgroup_path)
1718 return;
1719
1720 p = strjoina(UNIT(s)->cgroup_path, "/control");
1721 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, NULL);
1722 }
1723
1724 static void service_enter_start(Service *s) {
1725 ExecCommand *c;
1726 usec_t timeout;
1727 pid_t pid;
1728 int r;
1729
1730 assert(s);
1731
1732 service_unwatch_control_pid(s);
1733 service_unwatch_main_pid(s);
1734
1735 /* We want to ensure that nobody leaks processes from
1736 * START_PRE here, so let's go on a killing spree, People
1737 * should not spawn long running processes from START_PRE. */
1738 service_kill_control_processes(s);
1739
1740 if (s->type == SERVICE_FORKING) {
1741 s->control_command_id = SERVICE_EXEC_START;
1742 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1743
1744 s->main_command = NULL;
1745 } else {
1746 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1747 s->control_command = NULL;
1748
1749 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1750 }
1751
1752 if (!c) {
1753 assert(s->type == SERVICE_ONESHOT);
1754 service_enter_start_post(s);
1755 return;
1756 }
1757
1758 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1759 /* For simple + idle this is the main process. We don't apply any timeout here, but
1760 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1761 timeout = USEC_INFINITY;
1762 else
1763 timeout = s->timeout_start_usec;
1764
1765 r = service_spawn(s,
1766 c,
1767 timeout,
1768 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1769 &pid);
1770 if (r < 0)
1771 goto fail;
1772
1773 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1774 /* For simple services we immediately start
1775 * the START_POST binaries. */
1776
1777 service_set_main_pid(s, pid);
1778 service_enter_start_post(s);
1779
1780 } else if (s->type == SERVICE_FORKING) {
1781
1782 /* For forking services we wait until the start
1783 * process exited. */
1784
1785 s->control_pid = pid;
1786 service_set_state(s, SERVICE_START);
1787
1788 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1789
1790 /* For oneshot services we wait until the start
1791 * process exited, too, but it is our main process. */
1792
1793 /* For D-Bus services we know the main pid right away,
1794 * but wait for the bus name to appear on the
1795 * bus. Notify services are similar. */
1796
1797 service_set_main_pid(s, pid);
1798 service_set_state(s, SERVICE_START);
1799 } else
1800 assert_not_reached("Unknown service type");
1801
1802 return;
1803
1804 fail:
1805 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1806 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1807 }
1808
1809 static void service_enter_start_pre(Service *s) {
1810 int r;
1811
1812 assert(s);
1813
1814 service_unwatch_control_pid(s);
1815
1816 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1817 if (s->control_command) {
1818 /* Before we start anything, let's clear up what might
1819 * be left from previous runs. */
1820 service_kill_control_processes(s);
1821
1822 s->control_command_id = SERVICE_EXEC_START_PRE;
1823
1824 r = service_spawn(s,
1825 s->control_command,
1826 s->timeout_start_usec,
1827 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1828 &s->control_pid);
1829 if (r < 0)
1830 goto fail;
1831
1832 service_set_state(s, SERVICE_START_PRE);
1833 } else
1834 service_enter_start(s);
1835
1836 return;
1837
1838 fail:
1839 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1840 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1841 }
1842
1843 static void service_enter_restart(Service *s) {
1844 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1845 int r;
1846
1847 assert(s);
1848
1849 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1850 /* Don't restart things if we are going down anyway */
1851 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1852
1853 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1854 if (r < 0)
1855 goto fail;
1856
1857 return;
1858 }
1859
1860 /* Any units that are bound to this service must also be
1861 * restarted. We use JOB_RESTART (instead of the more obvious
1862 * JOB_START) here so that those dependency jobs will be added
1863 * as well. */
1864 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1865 if (r < 0)
1866 goto fail;
1867
1868 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1869 * it will be canceled as part of the service_stop() call that
1870 * is executed as part of JOB_RESTART. */
1871
1872 log_unit_debug(UNIT(s), "Scheduled restart job.");
1873 return;
1874
1875 fail:
1876 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
1877 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1878 }
1879
1880 static void service_enter_reload_by_notify(Service *s) {
1881 assert(s);
1882
1883 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
1884 service_set_state(s, SERVICE_RELOAD);
1885 }
1886
1887 static void service_enter_reload(Service *s) {
1888 int r;
1889
1890 assert(s);
1891
1892 service_unwatch_control_pid(s);
1893 s->reload_result = SERVICE_SUCCESS;
1894
1895 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1896 if (s->control_command) {
1897 s->control_command_id = SERVICE_EXEC_RELOAD;
1898
1899 r = service_spawn(s,
1900 s->control_command,
1901 s->timeout_start_usec,
1902 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1903 &s->control_pid);
1904 if (r < 0)
1905 goto fail;
1906
1907 service_set_state(s, SERVICE_RELOAD);
1908 } else
1909 service_enter_running(s, SERVICE_SUCCESS);
1910
1911 return;
1912
1913 fail:
1914 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
1915 s->reload_result = SERVICE_FAILURE_RESOURCES;
1916 service_enter_running(s, SERVICE_SUCCESS);
1917 }
1918
1919 static void service_run_next_control(Service *s) {
1920 usec_t timeout;
1921 int r;
1922
1923 assert(s);
1924 assert(s->control_command);
1925 assert(s->control_command->command_next);
1926
1927 assert(s->control_command_id != SERVICE_EXEC_START);
1928
1929 s->control_command = s->control_command->command_next;
1930 service_unwatch_control_pid(s);
1931
1932 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1933 timeout = s->timeout_start_usec;
1934 else
1935 timeout = s->timeout_stop_usec;
1936
1937 r = service_spawn(s,
1938 s->control_command,
1939 timeout,
1940 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
1941 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
1942 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
1943 &s->control_pid);
1944 if (r < 0)
1945 goto fail;
1946
1947 return;
1948
1949 fail:
1950 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
1951
1952 if (s->state == SERVICE_START_PRE)
1953 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1954 else if (s->state == SERVICE_STOP)
1955 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1956 else if (s->state == SERVICE_STOP_POST)
1957 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1958 else if (s->state == SERVICE_RELOAD) {
1959 s->reload_result = SERVICE_FAILURE_RESOURCES;
1960 service_enter_running(s, SERVICE_SUCCESS);
1961 } else
1962 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1963 }
1964
1965 static void service_run_next_main(Service *s) {
1966 pid_t pid;
1967 int r;
1968
1969 assert(s);
1970 assert(s->main_command);
1971 assert(s->main_command->command_next);
1972 assert(s->type == SERVICE_ONESHOT);
1973
1974 s->main_command = s->main_command->command_next;
1975 service_unwatch_main_pid(s);
1976
1977 r = service_spawn(s,
1978 s->main_command,
1979 s->timeout_start_usec,
1980 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1981 &pid);
1982 if (r < 0)
1983 goto fail;
1984
1985 service_set_main_pid(s, pid);
1986
1987 return;
1988
1989 fail:
1990 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
1991 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1992 }
1993
1994 static int service_start(Unit *u) {
1995 Service *s = SERVICE(u);
1996 int r;
1997
1998 assert(s);
1999
2000 /* We cannot fulfill this request right now, try again later
2001 * please! */
2002 if (IN_SET(s->state,
2003 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2004 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2005 return -EAGAIN;
2006
2007 /* Already on it! */
2008 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2009 return 0;
2010
2011 /* A service that will be restarted must be stopped first to
2012 * trigger BindsTo and/or OnFailure dependencies. If a user
2013 * does not want to wait for the holdoff time to elapse, the
2014 * service should be manually restarted, not started. We
2015 * simply return EAGAIN here, so that any start jobs stay
2016 * queued, and assume that the auto restart timer will
2017 * eventually trigger the restart. */
2018 if (s->state == SERVICE_AUTO_RESTART)
2019 return -EAGAIN;
2020
2021 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2022
2023 /* Make sure we don't enter a busy loop of some kind. */
2024 r = unit_start_limit_test(u);
2025 if (r < 0) {
2026 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2027 return r;
2028 }
2029
2030 s->result = SERVICE_SUCCESS;
2031 s->reload_result = SERVICE_SUCCESS;
2032 s->main_pid_known = false;
2033 s->main_pid_alien = false;
2034 s->forbid_restart = false;
2035 s->reset_cpu_usage = true;
2036
2037 s->status_text = mfree(s->status_text);
2038 s->status_errno = 0;
2039
2040 s->notify_state = NOTIFY_UNKNOWN;
2041
2042 s->watchdog_override_enable = false;
2043 s->watchdog_override_usec = 0;
2044
2045 service_enter_start_pre(s);
2046 return 1;
2047 }
2048
2049 static int service_stop(Unit *u) {
2050 Service *s = SERVICE(u);
2051
2052 assert(s);
2053
2054 /* Don't create restart jobs from manual stops. */
2055 s->forbid_restart = true;
2056
2057 /* Already on it */
2058 if (IN_SET(s->state,
2059 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2060 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2061 return 0;
2062
2063 /* A restart will be scheduled or is in progress. */
2064 if (s->state == SERVICE_AUTO_RESTART) {
2065 service_set_state(s, SERVICE_DEAD);
2066 return 0;
2067 }
2068
2069 /* If there's already something running we go directly into
2070 * kill mode. */
2071 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2072 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2073 return 0;
2074 }
2075
2076 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2077
2078 service_enter_stop(s, SERVICE_SUCCESS);
2079 return 1;
2080 }
2081
2082 static int service_reload(Unit *u) {
2083 Service *s = SERVICE(u);
2084
2085 assert(s);
2086
2087 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2088
2089 service_enter_reload(s);
2090 return 1;
2091 }
2092
2093 _pure_ static bool service_can_reload(Unit *u) {
2094 Service *s = SERVICE(u);
2095
2096 assert(s);
2097
2098 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2099 }
2100
2101 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2102 Service *s = SERVICE(u);
2103 ServiceFDStore *fs;
2104 int r;
2105
2106 assert(u);
2107 assert(f);
2108 assert(fds);
2109
2110 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2111 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2112 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2113
2114 if (s->control_pid > 0)
2115 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2116
2117 if (s->main_pid_known && s->main_pid > 0)
2118 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2119
2120 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2121 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2122 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2123
2124 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2125 if (r < 0)
2126 return r;
2127
2128 /* FIXME: There's a minor uncleanliness here: if there are
2129 * multiple commands attached here, we will start from the
2130 * first one again */
2131 if (s->control_command_id >= 0)
2132 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2133
2134 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2135 if (r < 0)
2136 return r;
2137 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2138 if (r < 0)
2139 return r;
2140 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2141 if (r < 0)
2142 return r;
2143
2144 if (UNIT_ISSET(s->accept_socket)) {
2145 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2146 if (r < 0)
2147 return r;
2148 }
2149
2150 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2151 if (r < 0)
2152 return r;
2153
2154 LIST_FOREACH(fd_store, fs, s->fd_store) {
2155 _cleanup_free_ char *c = NULL;
2156 int copy;
2157
2158 copy = fdset_put_dup(fds, fs->fd);
2159 if (copy < 0)
2160 return copy;
2161
2162 c = cescape(fs->fdname);
2163
2164 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2165 }
2166
2167 if (s->main_exec_status.pid > 0) {
2168 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2169 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2170 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2171
2172 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2173 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2174 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2175 }
2176 }
2177
2178 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2179
2180 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2181
2182 if (s->watchdog_override_enable)
2183 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2184
2185 return 0;
2186 }
2187
2188 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2189 Service *s = SERVICE(u);
2190 int r;
2191
2192 assert(u);
2193 assert(key);
2194 assert(value);
2195 assert(fds);
2196
2197 if (streq(key, "state")) {
2198 ServiceState state;
2199
2200 state = service_state_from_string(value);
2201 if (state < 0)
2202 log_unit_debug(u, "Failed to parse state value: %s", value);
2203 else
2204 s->deserialized_state = state;
2205 } else if (streq(key, "result")) {
2206 ServiceResult f;
2207
2208 f = service_result_from_string(value);
2209 if (f < 0)
2210 log_unit_debug(u, "Failed to parse result value: %s", value);
2211 else if (f != SERVICE_SUCCESS)
2212 s->result = f;
2213
2214 } else if (streq(key, "reload-result")) {
2215 ServiceResult f;
2216
2217 f = service_result_from_string(value);
2218 if (f < 0)
2219 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2220 else if (f != SERVICE_SUCCESS)
2221 s->reload_result = f;
2222
2223 } else if (streq(key, "control-pid")) {
2224 pid_t pid;
2225
2226 if (parse_pid(value, &pid) < 0)
2227 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2228 else
2229 s->control_pid = pid;
2230 } else if (streq(key, "main-pid")) {
2231 pid_t pid;
2232
2233 if (parse_pid(value, &pid) < 0)
2234 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2235 else {
2236 service_set_main_pid(s, pid);
2237 unit_watch_pid(UNIT(s), pid);
2238 }
2239 } else if (streq(key, "main-pid-known")) {
2240 int b;
2241
2242 b = parse_boolean(value);
2243 if (b < 0)
2244 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2245 else
2246 s->main_pid_known = b;
2247 } else if (streq(key, "bus-name-good")) {
2248 int b;
2249
2250 b = parse_boolean(value);
2251 if (b < 0)
2252 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2253 else
2254 s->bus_name_good = b;
2255 } else if (streq(key, "bus-name-owner")) {
2256 r = free_and_strdup(&s->bus_name_owner, value);
2257 if (r < 0)
2258 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2259 } else if (streq(key, "status-text")) {
2260 char *t;
2261
2262 r = cunescape(value, 0, &t);
2263 if (r < 0)
2264 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2265 else {
2266 free(s->status_text);
2267 s->status_text = t;
2268 }
2269
2270 } else if (streq(key, "control-command")) {
2271 ServiceExecCommand id;
2272
2273 id = service_exec_command_from_string(value);
2274 if (id < 0)
2275 log_unit_debug(u, "Failed to parse exec-command value: %s", value);
2276 else {
2277 s->control_command_id = id;
2278 s->control_command = s->exec_command[id];
2279 }
2280 } else if (streq(key, "accept-socket")) {
2281 Unit *socket;
2282
2283 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2284 if (r < 0)
2285 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2286 else {
2287 unit_ref_set(&s->accept_socket, socket);
2288 SOCKET(socket)->n_connections++;
2289 }
2290
2291 } else if (streq(key, "socket-fd")) {
2292 int fd;
2293
2294 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2295 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2296 else {
2297 asynchronous_close(s->socket_fd);
2298 s->socket_fd = fdset_remove(fds, fd);
2299 }
2300 } else if (streq(key, "fd-store-fd")) {
2301 const char *fdv;
2302 size_t pf;
2303 int fd;
2304
2305 pf = strcspn(value, WHITESPACE);
2306 fdv = strndupa(value, pf);
2307
2308 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2309 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2310 else {
2311 _cleanup_free_ char *t = NULL;
2312 const char *fdn;
2313
2314 fdn = value + pf;
2315 fdn += strspn(fdn, WHITESPACE);
2316 (void) cunescape(fdn, 0, &t);
2317
2318 r = service_add_fd_store(s, fd, t);
2319 if (r < 0)
2320 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2321 else if (r > 0)
2322 fdset_remove(fds, fd);
2323 }
2324
2325 } else if (streq(key, "main-exec-status-pid")) {
2326 pid_t pid;
2327
2328 if (parse_pid(value, &pid) < 0)
2329 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2330 else
2331 s->main_exec_status.pid = pid;
2332 } else if (streq(key, "main-exec-status-code")) {
2333 int i;
2334
2335 if (safe_atoi(value, &i) < 0)
2336 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2337 else
2338 s->main_exec_status.code = i;
2339 } else if (streq(key, "main-exec-status-status")) {
2340 int i;
2341
2342 if (safe_atoi(value, &i) < 0)
2343 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2344 else
2345 s->main_exec_status.status = i;
2346 } else if (streq(key, "main-exec-status-start"))
2347 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2348 else if (streq(key, "main-exec-status-exit"))
2349 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2350 else if (streq(key, "watchdog-timestamp"))
2351 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2352 else if (streq(key, "forbid-restart")) {
2353 int b;
2354
2355 b = parse_boolean(value);
2356 if (b < 0)
2357 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2358 else
2359 s->forbid_restart = b;
2360 } else if (streq(key, "stdin-fd")) {
2361 int fd;
2362
2363 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2364 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2365 else {
2366 asynchronous_close(s->stdin_fd);
2367 s->stdin_fd = fdset_remove(fds, fd);
2368 s->exec_context.stdio_as_fds = true;
2369 }
2370 } else if (streq(key, "stdout-fd")) {
2371 int fd;
2372
2373 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2374 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2375 else {
2376 asynchronous_close(s->stdout_fd);
2377 s->stdout_fd = fdset_remove(fds, fd);
2378 s->exec_context.stdio_as_fds = true;
2379 }
2380 } else if (streq(key, "stderr-fd")) {
2381 int fd;
2382
2383 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2384 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2385 else {
2386 asynchronous_close(s->stderr_fd);
2387 s->stderr_fd = fdset_remove(fds, fd);
2388 s->exec_context.stdio_as_fds = true;
2389 }
2390 } else if (streq(key, "watchdog-override-usec")) {
2391 usec_t watchdog_override_usec;
2392 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2393 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2394 else {
2395 s->watchdog_override_enable = true;
2396 s->watchdog_override_usec = watchdog_override_usec;
2397 }
2398 } else
2399 log_unit_debug(u, "Unknown serialization key: %s", key);
2400
2401 return 0;
2402 }
2403
2404 _pure_ static UnitActiveState service_active_state(Unit *u) {
2405 const UnitActiveState *table;
2406
2407 assert(u);
2408
2409 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2410
2411 return table[SERVICE(u)->state];
2412 }
2413
2414 static const char *service_sub_state_to_string(Unit *u) {
2415 assert(u);
2416
2417 return service_state_to_string(SERVICE(u)->state);
2418 }
2419
2420 static bool service_check_gc(Unit *u) {
2421 Service *s = SERVICE(u);
2422
2423 assert(s);
2424
2425 /* Never clean up services that still have a process around,
2426 * even if the service is formally dead. */
2427 if (cgroup_good(s) > 0 ||
2428 main_pid_good(s) > 0 ||
2429 control_pid_good(s) > 0)
2430 return true;
2431
2432 return false;
2433 }
2434
2435 static int service_retry_pid_file(Service *s) {
2436 int r;
2437
2438 assert(s->pid_file);
2439 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2440
2441 r = service_load_pid_file(s, false);
2442 if (r < 0)
2443 return r;
2444
2445 service_unwatch_pid_file(s);
2446
2447 service_enter_running(s, SERVICE_SUCCESS);
2448 return 0;
2449 }
2450
2451 static int service_watch_pid_file(Service *s) {
2452 int r;
2453
2454 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2455
2456 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2457 if (r < 0)
2458 goto fail;
2459
2460 /* the pidfile might have appeared just before we set the watch */
2461 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2462 service_retry_pid_file(s);
2463
2464 return 0;
2465 fail:
2466 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2467 service_unwatch_pid_file(s);
2468 return r;
2469 }
2470
2471 static int service_demand_pid_file(Service *s) {
2472 PathSpec *ps;
2473
2474 assert(s->pid_file);
2475 assert(!s->pid_file_pathspec);
2476
2477 ps = new0(PathSpec, 1);
2478 if (!ps)
2479 return -ENOMEM;
2480
2481 ps->unit = UNIT(s);
2482 ps->path = strdup(s->pid_file);
2483 if (!ps->path) {
2484 free(ps);
2485 return -ENOMEM;
2486 }
2487
2488 path_kill_slashes(ps->path);
2489
2490 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2491 * keep their PID file open all the time. */
2492 ps->type = PATH_MODIFIED;
2493 ps->inotify_fd = -1;
2494
2495 s->pid_file_pathspec = ps;
2496
2497 return service_watch_pid_file(s);
2498 }
2499
2500 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2501 PathSpec *p = userdata;
2502 Service *s;
2503
2504 assert(p);
2505
2506 s = SERVICE(p->unit);
2507
2508 assert(s);
2509 assert(fd >= 0);
2510 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2511 assert(s->pid_file_pathspec);
2512 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2513
2514 log_unit_debug(UNIT(s), "inotify event");
2515
2516 if (path_spec_fd_event(p, events) < 0)
2517 goto fail;
2518
2519 if (service_retry_pid_file(s) == 0)
2520 return 0;
2521
2522 if (service_watch_pid_file(s) < 0)
2523 goto fail;
2524
2525 return 0;
2526
2527 fail:
2528 service_unwatch_pid_file(s);
2529 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2530 return 0;
2531 }
2532
2533 static void service_notify_cgroup_empty_event(Unit *u) {
2534 Service *s = SERVICE(u);
2535
2536 assert(u);
2537
2538 log_unit_debug(u, "cgroup is empty");
2539
2540 switch (s->state) {
2541
2542 /* Waiting for SIGCHLD is usually more interesting,
2543 * because it includes return codes/signals. Which is
2544 * why we ignore the cgroup events for most cases,
2545 * except when we don't know pid which to expect the
2546 * SIGCHLD for. */
2547
2548 case SERVICE_START:
2549 case SERVICE_START_POST:
2550 /* If we were hoping for the daemon to write its PID file,
2551 * we can give up now. */
2552 if (s->pid_file_pathspec) {
2553 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2554
2555 service_unwatch_pid_file(s);
2556 if (s->state == SERVICE_START)
2557 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2558 else
2559 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2560 }
2561 break;
2562
2563 case SERVICE_RUNNING:
2564 /* service_enter_running() will figure out what to do */
2565 service_enter_running(s, SERVICE_SUCCESS);
2566 break;
2567
2568 case SERVICE_STOP_SIGABRT:
2569 case SERVICE_STOP_SIGTERM:
2570 case SERVICE_STOP_SIGKILL:
2571
2572 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2573 service_enter_stop_post(s, SERVICE_SUCCESS);
2574
2575 break;
2576
2577 case SERVICE_STOP_POST:
2578 case SERVICE_FINAL_SIGTERM:
2579 case SERVICE_FINAL_SIGKILL:
2580 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2581 service_enter_dead(s, SERVICE_SUCCESS, true);
2582
2583 break;
2584
2585 default:
2586 ;
2587 }
2588 }
2589
2590 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2591 Service *s = SERVICE(u);
2592 ServiceResult f;
2593
2594 assert(s);
2595 assert(pid >= 0);
2596
2597 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2598 is_clean_exit_lsb(code, status, &s->success_status))
2599 f = SERVICE_SUCCESS;
2600 else if (code == CLD_EXITED)
2601 f = SERVICE_FAILURE_EXIT_CODE;
2602 else if (code == CLD_KILLED)
2603 f = SERVICE_FAILURE_SIGNAL;
2604 else if (code == CLD_DUMPED)
2605 f = SERVICE_FAILURE_CORE_DUMP;
2606 else
2607 assert_not_reached("Unknown code");
2608
2609 if (s->main_pid == pid) {
2610 /* Forking services may occasionally move to a new PID.
2611 * As long as they update the PID file before exiting the old
2612 * PID, they're fine. */
2613 if (service_load_pid_file(s, false) == 0)
2614 return;
2615
2616 s->main_pid = 0;
2617 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2618
2619 if (s->main_command) {
2620 /* If this is not a forking service than the
2621 * main process got started and hence we copy
2622 * the exit status so that it is recorded both
2623 * as main and as control process exit
2624 * status */
2625
2626 s->main_command->exec_status = s->main_exec_status;
2627
2628 if (s->main_command->ignore)
2629 f = SERVICE_SUCCESS;
2630 } else if (s->exec_command[SERVICE_EXEC_START]) {
2631
2632 /* If this is a forked process, then we should
2633 * ignore the return value if this was
2634 * configured for the starter process */
2635
2636 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2637 f = SERVICE_SUCCESS;
2638 }
2639
2640 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2641 LOG_UNIT_ID(u),
2642 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2643 sigchld_code_to_string(code), status,
2644 strna(code == CLD_EXITED
2645 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2646 : signal_to_string(status))),
2647 "EXIT_CODE=%s", sigchld_code_to_string(code),
2648 "EXIT_STATUS=%i", status,
2649 NULL);
2650
2651 if (s->result == SERVICE_SUCCESS)
2652 s->result = f;
2653
2654 if (s->main_command &&
2655 s->main_command->command_next &&
2656 f == SERVICE_SUCCESS) {
2657
2658 /* There is another command to *
2659 * execute, so let's do that. */
2660
2661 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2662 service_run_next_main(s);
2663
2664 } else {
2665
2666 /* The service exited, so the service is officially
2667 * gone. */
2668 s->main_command = NULL;
2669
2670 switch (s->state) {
2671
2672 case SERVICE_START_POST:
2673 case SERVICE_RELOAD:
2674 case SERVICE_STOP:
2675 /* Need to wait until the operation is
2676 * done */
2677 break;
2678
2679 case SERVICE_START:
2680 if (s->type == SERVICE_ONESHOT) {
2681 /* This was our main goal, so let's go on */
2682 if (f == SERVICE_SUCCESS)
2683 service_enter_start_post(s);
2684 else
2685 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2686 break;
2687 }
2688
2689 /* Fall through */
2690
2691 case SERVICE_RUNNING:
2692 service_enter_running(s, f);
2693 break;
2694
2695 case SERVICE_STOP_SIGABRT:
2696 case SERVICE_STOP_SIGTERM:
2697 case SERVICE_STOP_SIGKILL:
2698
2699 if (!control_pid_good(s))
2700 service_enter_stop_post(s, f);
2701
2702 /* If there is still a control process, wait for that first */
2703 break;
2704
2705 case SERVICE_STOP_POST:
2706 case SERVICE_FINAL_SIGTERM:
2707 case SERVICE_FINAL_SIGKILL:
2708
2709 if (!control_pid_good(s))
2710 service_enter_dead(s, f, true);
2711 break;
2712
2713 default:
2714 assert_not_reached("Uh, main process died at wrong time.");
2715 }
2716 }
2717
2718 } else if (s->control_pid == pid) {
2719 s->control_pid = 0;
2720
2721 if (s->control_command) {
2722 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2723
2724 if (s->control_command->ignore)
2725 f = SERVICE_SUCCESS;
2726 }
2727
2728 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
2729 "Control process exited, code=%s status=%i",
2730 sigchld_code_to_string(code), status);
2731
2732 if (s->result == SERVICE_SUCCESS)
2733 s->result = f;
2734
2735 /* Immediately get rid of the cgroup, so that the
2736 * kernel doesn't delay the cgroup empty messages for
2737 * the service cgroup any longer than necessary */
2738 service_kill_control_processes(s);
2739
2740 if (s->control_command &&
2741 s->control_command->command_next &&
2742 f == SERVICE_SUCCESS) {
2743
2744 /* There is another command to *
2745 * execute, so let's do that. */
2746
2747 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
2748 service_run_next_control(s);
2749
2750 } else {
2751 /* No further commands for this step, so let's
2752 * figure out what to do next */
2753
2754 s->control_command = NULL;
2755 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2756
2757 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
2758
2759 switch (s->state) {
2760
2761 case SERVICE_START_PRE:
2762 if (f == SERVICE_SUCCESS)
2763 service_enter_start(s);
2764 else
2765 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2766 break;
2767
2768 case SERVICE_START:
2769 if (s->type != SERVICE_FORKING)
2770 /* Maybe spurious event due to a reload that changed the type? */
2771 break;
2772
2773 if (f != SERVICE_SUCCESS) {
2774 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2775 break;
2776 }
2777
2778 if (s->pid_file) {
2779 bool has_start_post;
2780 int r;
2781
2782 /* Let's try to load the pid file here if we can.
2783 * The PID file might actually be created by a START_POST
2784 * script. In that case don't worry if the loading fails. */
2785
2786 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2787 r = service_load_pid_file(s, !has_start_post);
2788 if (!has_start_post && r < 0) {
2789 r = service_demand_pid_file(s);
2790 if (r < 0 || !cgroup_good(s))
2791 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2792 break;
2793 }
2794 } else
2795 service_search_main_pid(s);
2796
2797 service_enter_start_post(s);
2798 break;
2799
2800 case SERVICE_START_POST:
2801 if (f != SERVICE_SUCCESS) {
2802 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2803 break;
2804 }
2805
2806 if (s->pid_file) {
2807 int r;
2808
2809 r = service_load_pid_file(s, true);
2810 if (r < 0) {
2811 r = service_demand_pid_file(s);
2812 if (r < 0 || !cgroup_good(s))
2813 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2814 break;
2815 }
2816 } else
2817 service_search_main_pid(s);
2818
2819 service_enter_running(s, SERVICE_SUCCESS);
2820 break;
2821
2822 case SERVICE_RELOAD:
2823 if (f == SERVICE_SUCCESS)
2824 if (service_load_pid_file(s, true) < 0)
2825 service_search_main_pid(s);
2826
2827 s->reload_result = f;
2828 service_enter_running(s, SERVICE_SUCCESS);
2829 break;
2830
2831 case SERVICE_STOP:
2832 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2833 break;
2834
2835 case SERVICE_STOP_SIGABRT:
2836 case SERVICE_STOP_SIGTERM:
2837 case SERVICE_STOP_SIGKILL:
2838 if (main_pid_good(s) <= 0)
2839 service_enter_stop_post(s, f);
2840
2841 /* If there is still a service
2842 * process around, wait until
2843 * that one quit, too */
2844 break;
2845
2846 case SERVICE_STOP_POST:
2847 case SERVICE_FINAL_SIGTERM:
2848 case SERVICE_FINAL_SIGKILL:
2849 if (main_pid_good(s) <= 0)
2850 service_enter_dead(s, f, true);
2851 break;
2852
2853 default:
2854 assert_not_reached("Uh, control process died at wrong time.");
2855 }
2856 }
2857 }
2858
2859 /* Notify clients about changed exit status */
2860 unit_add_to_dbus_queue(u);
2861
2862 /* We got one SIGCHLD for the service, let's watch all
2863 * processes that are now running of the service, and watch
2864 * that. Among the PIDs we then watch will be children
2865 * reassigned to us, which hopefully allows us to identify
2866 * when all children are gone */
2867 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
2868 unit_watch_all_pids(u);
2869
2870 /* If the PID set is empty now, then let's finish this off
2871 (On unified we use proper notifications) */
2872 if (cg_unified() <= 0 && set_isempty(u->pids))
2873 service_notify_cgroup_empty_event(u);
2874 }
2875
2876 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
2877 Service *s = SERVICE(userdata);
2878
2879 assert(s);
2880 assert(source == s->timer_event_source);
2881
2882 switch (s->state) {
2883
2884 case SERVICE_START_PRE:
2885 case SERVICE_START:
2886 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
2887 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2888 break;
2889
2890 case SERVICE_START_POST:
2891 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
2892 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2893 break;
2894
2895 case SERVICE_RUNNING:
2896 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
2897 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
2898 break;
2899
2900 case SERVICE_RELOAD:
2901 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
2902 service_kill_control_processes(s);
2903 s->reload_result = SERVICE_FAILURE_TIMEOUT;
2904 service_enter_running(s, SERVICE_SUCCESS);
2905 break;
2906
2907 case SERVICE_STOP:
2908 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
2909 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2910 break;
2911
2912 case SERVICE_STOP_SIGABRT:
2913 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
2914 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2915 break;
2916
2917 case SERVICE_STOP_SIGTERM:
2918 if (s->kill_context.send_sigkill) {
2919 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
2920 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2921 } else {
2922 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
2923 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2924 }
2925
2926 break;
2927
2928 case SERVICE_STOP_SIGKILL:
2929 /* Uh, we sent a SIGKILL and it is still not gone?
2930 * Must be something we cannot kill, so let's just be
2931 * weirded out and continue */
2932
2933 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
2934 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2935 break;
2936
2937 case SERVICE_STOP_POST:
2938 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
2939 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2940 break;
2941
2942 case SERVICE_FINAL_SIGTERM:
2943 if (s->kill_context.send_sigkill) {
2944 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
2945 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2946 } else {
2947 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
2948 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
2949 }
2950
2951 break;
2952
2953 case SERVICE_FINAL_SIGKILL:
2954 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
2955 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
2956 break;
2957
2958 case SERVICE_AUTO_RESTART:
2959 log_unit_info(UNIT(s),
2960 s->restart_usec > 0 ?
2961 "Service hold-off time over, scheduling restart." :
2962 "Service has no hold-off time, scheduling restart.");
2963 service_enter_restart(s);
2964 break;
2965
2966 default:
2967 assert_not_reached("Timeout at wrong time.");
2968 }
2969
2970 return 0;
2971 }
2972
2973 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
2974 Service *s = SERVICE(userdata);
2975 char t[FORMAT_TIMESPAN_MAX];
2976 usec_t watchdog_usec;
2977
2978 assert(s);
2979 assert(source == s->watchdog_event_source);
2980
2981 watchdog_usec = service_get_watchdog_usec(s);
2982
2983 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
2984 format_timespan(t, sizeof(t), watchdog_usec, 1));
2985
2986 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
2987
2988 return 0;
2989 }
2990
2991 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
2992 Service *s = SERVICE(u);
2993 _cleanup_free_ char *cc = NULL;
2994 bool notify_dbus = false;
2995 const char *e;
2996
2997 assert(u);
2998
2999 cc = strv_join(tags, ", ");
3000
3001 if (s->notify_access == NOTIFY_NONE) {
3002 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3003 return;
3004 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3005 if (s->main_pid != 0)
3006 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3007 else
3008 log_unit_debug(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3009 return;
3010 } else
3011 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3012
3013 /* Interpret MAINPID= */
3014 e = strv_find_startswith(tags, "MAINPID=");
3015 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3016 if (parse_pid(e, &pid) < 0)
3017 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3018 else {
3019 service_set_main_pid(s, pid);
3020 unit_watch_pid(UNIT(s), pid);
3021 notify_dbus = true;
3022 }
3023 }
3024
3025 /* Interpret RELOADING= */
3026 if (strv_find(tags, "RELOADING=1")) {
3027
3028 s->notify_state = NOTIFY_RELOADING;
3029
3030 if (s->state == SERVICE_RUNNING)
3031 service_enter_reload_by_notify(s);
3032
3033 notify_dbus = true;
3034 }
3035
3036 /* Interpret READY= */
3037 if (strv_find(tags, "READY=1")) {
3038
3039 s->notify_state = NOTIFY_READY;
3040
3041 /* Type=notify services inform us about completed
3042 * initialization with READY=1 */
3043 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3044 service_enter_start_post(s);
3045
3046 /* Sending READY=1 while we are reloading informs us
3047 * that the reloading is complete */
3048 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3049 service_enter_running(s, SERVICE_SUCCESS);
3050
3051 notify_dbus = true;
3052 }
3053
3054 /* Interpret STOPPING= */
3055 if (strv_find(tags, "STOPPING=1")) {
3056
3057 s->notify_state = NOTIFY_STOPPING;
3058
3059 if (s->state == SERVICE_RUNNING)
3060 service_enter_stop_by_notify(s);
3061
3062 notify_dbus = true;
3063 }
3064
3065 /* Interpret STATUS= */
3066 e = strv_find_startswith(tags, "STATUS=");
3067 if (e) {
3068 _cleanup_free_ char *t = NULL;
3069
3070 if (!isempty(e)) {
3071 if (!utf8_is_valid(e))
3072 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3073 else {
3074 t = strdup(e);
3075 if (!t)
3076 log_oom();
3077 }
3078 }
3079
3080 if (!streq_ptr(s->status_text, t)) {
3081
3082 free(s->status_text);
3083 s->status_text = t;
3084 t = NULL;
3085
3086 notify_dbus = true;
3087 }
3088 }
3089
3090 /* Interpret ERRNO= */
3091 e = strv_find_startswith(tags, "ERRNO=");
3092 if (e) {
3093 int status_errno;
3094
3095 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3096 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3097 else {
3098 if (s->status_errno != status_errno) {
3099 s->status_errno = status_errno;
3100 notify_dbus = true;
3101 }
3102 }
3103 }
3104
3105 /* Interpret WATCHDOG= */
3106 if (strv_find(tags, "WATCHDOG=1"))
3107 service_reset_watchdog(s);
3108
3109 if (strv_find(tags, "FDSTORE=1")) {
3110 const char *name;
3111
3112 name = strv_find_startswith(tags, "FDNAME=");
3113 if (name && !fdname_is_valid(name)) {
3114 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3115 name = NULL;
3116 }
3117
3118 service_add_fd_store_set(s, fds, name);
3119 }
3120
3121 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3122 if (e) {
3123 usec_t watchdog_override_usec;
3124 if (safe_atou64(e, &watchdog_override_usec) < 0)
3125 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3126 else
3127 service_reset_watchdog_timeout(s, watchdog_override_usec);
3128 }
3129
3130 /* Notify clients about changed status or main pid */
3131 if (notify_dbus)
3132 unit_add_to_dbus_queue(u);
3133 }
3134
3135 static int service_get_timeout(Unit *u, usec_t *timeout) {
3136 Service *s = SERVICE(u);
3137 uint64_t t;
3138 int r;
3139
3140 if (!s->timer_event_source)
3141 return 0;
3142
3143 r = sd_event_source_get_time(s->timer_event_source, &t);
3144 if (r < 0)
3145 return r;
3146 if (t == USEC_INFINITY)
3147 return 0;
3148
3149 *timeout = t;
3150 return 1;
3151 }
3152
3153 static void service_bus_name_owner_change(
3154 Unit *u,
3155 const char *name,
3156 const char *old_owner,
3157 const char *new_owner) {
3158
3159 Service *s = SERVICE(u);
3160 int r;
3161
3162 assert(s);
3163 assert(name);
3164
3165 assert(streq(s->bus_name, name));
3166 assert(old_owner || new_owner);
3167
3168 if (old_owner && new_owner)
3169 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3170 else if (old_owner)
3171 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3172 else
3173 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3174
3175 s->bus_name_good = !!new_owner;
3176
3177 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3178 r = free_and_strdup(&s->bus_name_owner, new_owner);
3179 if (r < 0) {
3180 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3181 return;
3182 }
3183
3184 if (s->type == SERVICE_DBUS) {
3185
3186 /* service_enter_running() will figure out what to
3187 * do */
3188 if (s->state == SERVICE_RUNNING)
3189 service_enter_running(s, SERVICE_SUCCESS);
3190 else if (s->state == SERVICE_START && new_owner)
3191 service_enter_start_post(s);
3192
3193 } else if (new_owner &&
3194 s->main_pid <= 0 &&
3195 (s->state == SERVICE_START ||
3196 s->state == SERVICE_START_POST ||
3197 s->state == SERVICE_RUNNING ||
3198 s->state == SERVICE_RELOAD)) {
3199
3200 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3201 pid_t pid;
3202
3203 /* Try to acquire PID from bus service */
3204
3205 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3206 if (r >= 0)
3207 r = sd_bus_creds_get_pid(creds, &pid);
3208 if (r >= 0) {
3209 log_unit_debug(u, "D-Bus name %s is now owned by process %u", name, (unsigned) pid);
3210
3211 service_set_main_pid(s, pid);
3212 unit_watch_pid(UNIT(s), pid);
3213 }
3214 }
3215 }
3216
3217 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3218 _cleanup_free_ char *peer = NULL;
3219 int r;
3220
3221 assert(s);
3222 assert(fd >= 0);
3223
3224 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3225 * to be configured. We take ownership of the passed fd on success. */
3226
3227 if (UNIT(s)->load_state != UNIT_LOADED)
3228 return -EINVAL;
3229
3230 if (s->socket_fd >= 0)
3231 return -EBUSY;
3232
3233 if (s->state != SERVICE_DEAD)
3234 return -EAGAIN;
3235
3236 if (getpeername_pretty(fd, true, &peer) >= 0) {
3237
3238 if (UNIT(s)->description) {
3239 _cleanup_free_ char *a;
3240
3241 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3242 if (!a)
3243 return -ENOMEM;
3244
3245 r = unit_set_description(UNIT(s), a);
3246 } else
3247 r = unit_set_description(UNIT(s), peer);
3248
3249 if (r < 0)
3250 return r;
3251 }
3252
3253 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3254 if (r < 0)
3255 return r;
3256
3257 s->socket_fd = fd;
3258 s->socket_fd_selinux_context_net = selinux_context_net;
3259
3260 unit_ref_set(&s->accept_socket, UNIT(sock));
3261 return 0;
3262 }
3263
3264 static void service_reset_failed(Unit *u) {
3265 Service *s = SERVICE(u);
3266
3267 assert(s);
3268
3269 if (s->state == SERVICE_FAILED)
3270 service_set_state(s, SERVICE_DEAD);
3271
3272 s->result = SERVICE_SUCCESS;
3273 s->reload_result = SERVICE_SUCCESS;
3274 }
3275
3276 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3277 Service *s = SERVICE(u);
3278
3279 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3280 }
3281
3282 static int service_main_pid(Unit *u) {
3283 Service *s = SERVICE(u);
3284
3285 assert(s);
3286
3287 return s->main_pid;
3288 }
3289
3290 static int service_control_pid(Unit *u) {
3291 Service *s = SERVICE(u);
3292
3293 assert(s);
3294
3295 return s->control_pid;
3296 }
3297
3298 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3299 [SERVICE_RESTART_NO] = "no",
3300 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3301 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3302 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3303 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3304 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3305 [SERVICE_RESTART_ALWAYS] = "always",
3306 };
3307
3308 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3309
3310 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3311 [SERVICE_SIMPLE] = "simple",
3312 [SERVICE_FORKING] = "forking",
3313 [SERVICE_ONESHOT] = "oneshot",
3314 [SERVICE_DBUS] = "dbus",
3315 [SERVICE_NOTIFY] = "notify",
3316 [SERVICE_IDLE] = "idle"
3317 };
3318
3319 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3320
3321 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3322 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3323 [SERVICE_EXEC_START] = "ExecStart",
3324 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3325 [SERVICE_EXEC_RELOAD] = "ExecReload",
3326 [SERVICE_EXEC_STOP] = "ExecStop",
3327 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3328 };
3329
3330 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3331
3332 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3333 [NOTIFY_NONE] = "none",
3334 [NOTIFY_MAIN] = "main",
3335 [NOTIFY_ALL] = "all"
3336 };
3337
3338 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3339
3340 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3341 [NOTIFY_UNKNOWN] = "unknown",
3342 [NOTIFY_READY] = "ready",
3343 [NOTIFY_RELOADING] = "reloading",
3344 [NOTIFY_STOPPING] = "stopping",
3345 };
3346
3347 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3348
3349 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3350 [SERVICE_SUCCESS] = "success",
3351 [SERVICE_FAILURE_RESOURCES] = "resources",
3352 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3353 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3354 [SERVICE_FAILURE_SIGNAL] = "signal",
3355 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3356 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3357 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3358 };
3359
3360 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3361
3362 const UnitVTable service_vtable = {
3363 .object_size = sizeof(Service),
3364 .exec_context_offset = offsetof(Service, exec_context),
3365 .cgroup_context_offset = offsetof(Service, cgroup_context),
3366 .kill_context_offset = offsetof(Service, kill_context),
3367 .exec_runtime_offset = offsetof(Service, exec_runtime),
3368 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3369
3370 .sections =
3371 "Unit\0"
3372 "Service\0"
3373 "Install\0",
3374 .private_section = "Service",
3375
3376 .init = service_init,
3377 .done = service_done,
3378 .load = service_load,
3379 .release_resources = service_release_resources,
3380
3381 .coldplug = service_coldplug,
3382
3383 .dump = service_dump,
3384
3385 .start = service_start,
3386 .stop = service_stop,
3387 .reload = service_reload,
3388
3389 .can_reload = service_can_reload,
3390
3391 .kill = service_kill,
3392
3393 .serialize = service_serialize,
3394 .deserialize_item = service_deserialize_item,
3395
3396 .active_state = service_active_state,
3397 .sub_state_to_string = service_sub_state_to_string,
3398
3399 .check_gc = service_check_gc,
3400
3401 .sigchld_event = service_sigchld_event,
3402
3403 .reset_failed = service_reset_failed,
3404
3405 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3406 .notify_message = service_notify_message,
3407
3408 .main_pid = service_main_pid,
3409 .control_pid = service_control_pid,
3410
3411 .bus_name_owner_change = service_bus_name_owner_change,
3412
3413 .bus_vtable = bus_service_vtable,
3414 .bus_set_property = bus_service_set_property,
3415 .bus_commit_properties = bus_service_commit_properties,
3416
3417 .get_timeout = service_get_timeout,
3418 .can_transient = true,
3419
3420 .status_message_formats = {
3421 .starting_stopping = {
3422 [0] = "Starting %s...",
3423 [1] = "Stopping %s...",
3424 },
3425 .finished_start_job = {
3426 [JOB_DONE] = "Started %s.",
3427 [JOB_FAILED] = "Failed to start %s.",
3428 },
3429 .finished_stop_job = {
3430 [JOB_DONE] = "Stopped %s.",
3431 [JOB_FAILED] = "Stopped (with error) %s.",
3432 },
3433 },
3434 };
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