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sysusers: fix memleak (#4430)
[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 r = -errno;
1261
1262 /* ENOTCONN is legitimate if the endpoint disappeared on shutdown.
1263 * This connection is over, but the socket unit lives on. */
1264 if (r != -ENOTCONN || !IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST))
1265 return r;
1266 }
1267
1268 if (r == 0 && IN_SET(sa.sa.sa_family, AF_INET, AF_INET6)) {
1269 _cleanup_free_ char *addr = NULL;
1270 char *t;
1271 int port;
1272
1273 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1274 if (r < 0)
1275 return r;
1276
1277 t = strappend("REMOTE_ADDR=", addr);
1278 if (!t)
1279 return -ENOMEM;
1280 our_env[n_env++] = t;
1281
1282 port = sockaddr_port(&sa.sa);
1283 if (port < 0)
1284 return port;
1285
1286 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1287 return -ENOMEM;
1288 our_env[n_env++] = t;
1289 }
1290 }
1291
1292 if (flags & EXEC_SETENV_RESULT) {
1293 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1294 return -ENOMEM;
1295
1296 if (s->main_exec_status.pid > 0 &&
1297 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1298 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1299 return -ENOMEM;
1300
1301 if (s->main_exec_status.code == CLD_EXITED)
1302 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1303 else
1304 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1305 if (r < 0)
1306 return -ENOMEM;
1307 }
1308 }
1309
1310 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1311 if (!final_env)
1312 return -ENOMEM;
1313
1314 if ((flags & EXEC_IS_CONTROL) && UNIT(s)->cgroup_path) {
1315 path = strjoina(UNIT(s)->cgroup_path, "/control");
1316 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1317 } else
1318 path = UNIT(s)->cgroup_path;
1319
1320 exec_params.argv = argv;
1321 exec_params.environment = final_env;
1322 exec_params.fds = fds;
1323 exec_params.fd_names = fd_names;
1324 exec_params.n_fds = n_fds;
1325 exec_params.flags |= UNIT(s)->manager->confirm_spawn ? EXEC_CONFIRM_SPAWN : 0;
1326 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1327 exec_params.cgroup_path = path;
1328 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1329 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1330 exec_params.watchdog_usec = s->watchdog_usec;
1331 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1332 if (s->type == SERVICE_IDLE)
1333 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1334 exec_params.stdin_fd = s->stdin_fd;
1335 exec_params.stdout_fd = s->stdout_fd;
1336 exec_params.stderr_fd = s->stderr_fd;
1337
1338 r = exec_spawn(UNIT(s),
1339 c,
1340 &s->exec_context,
1341 &exec_params,
1342 s->exec_runtime,
1343 &s->dynamic_creds,
1344 &pid);
1345 if (r < 0)
1346 return r;
1347
1348 r = unit_watch_pid(UNIT(s), pid);
1349 if (r < 0)
1350 /* FIXME: we need to do something here */
1351 return r;
1352
1353 *_pid = pid;
1354
1355 return 0;
1356 }
1357
1358 static int main_pid_good(Service *s) {
1359 assert(s);
1360
1361 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1362 * don't know */
1363
1364 /* If we know the pid file, then let's just check if it is
1365 * still valid */
1366 if (s->main_pid_known) {
1367
1368 /* If it's an alien child let's check if it is still
1369 * alive ... */
1370 if (s->main_pid_alien && s->main_pid > 0)
1371 return pid_is_alive(s->main_pid);
1372
1373 /* .. otherwise assume we'll get a SIGCHLD for it,
1374 * which we really should wait for to collect exit
1375 * status and code */
1376 return s->main_pid > 0;
1377 }
1378
1379 /* We don't know the pid */
1380 return -EAGAIN;
1381 }
1382
1383 _pure_ static int control_pid_good(Service *s) {
1384 assert(s);
1385
1386 return s->control_pid > 0;
1387 }
1388
1389 static int cgroup_good(Service *s) {
1390 int r;
1391
1392 assert(s);
1393
1394 if (!UNIT(s)->cgroup_path)
1395 return 0;
1396
1397 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1398 if (r < 0)
1399 return r;
1400
1401 return !r;
1402 }
1403
1404 static bool service_shall_restart(Service *s) {
1405 assert(s);
1406
1407 /* Don't restart after manual stops */
1408 if (s->forbid_restart)
1409 return false;
1410
1411 /* Never restart if this is configured as special exception */
1412 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1413 return false;
1414
1415 /* Restart if the exit code/status are configured as restart triggers */
1416 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1417 return true;
1418
1419 switch (s->restart) {
1420
1421 case SERVICE_RESTART_NO:
1422 return false;
1423
1424 case SERVICE_RESTART_ALWAYS:
1425 return true;
1426
1427 case SERVICE_RESTART_ON_SUCCESS:
1428 return s->result == SERVICE_SUCCESS;
1429
1430 case SERVICE_RESTART_ON_FAILURE:
1431 return s->result != SERVICE_SUCCESS;
1432
1433 case SERVICE_RESTART_ON_ABNORMAL:
1434 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1435
1436 case SERVICE_RESTART_ON_WATCHDOG:
1437 return s->result == SERVICE_FAILURE_WATCHDOG;
1438
1439 case SERVICE_RESTART_ON_ABORT:
1440 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1441
1442 default:
1443 assert_not_reached("unknown restart setting");
1444 }
1445 }
1446
1447 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1448 int r;
1449 assert(s);
1450
1451 if (s->result == SERVICE_SUCCESS)
1452 s->result = f;
1453
1454 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1455
1456 if (s->result != SERVICE_SUCCESS) {
1457 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1458 failure_action(UNIT(s)->manager, s->failure_action, UNIT(s)->reboot_arg);
1459 }
1460
1461 if (allow_restart && service_shall_restart(s)) {
1462
1463 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1464 if (r < 0)
1465 goto fail;
1466
1467 service_set_state(s, SERVICE_AUTO_RESTART);
1468 }
1469
1470 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1471 s->forbid_restart = false;
1472
1473 /* We want fresh tmpdirs in case service is started again immediately */
1474 exec_runtime_destroy(s->exec_runtime);
1475 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1476
1477 /* Also, remove the runtime directory */
1478 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1479
1480 /* Get rid of the IPC bits of the user */
1481 unit_unref_uid_gid(UNIT(s), true);
1482
1483 /* Release the user, and destroy it if we are the only remaining owner */
1484 dynamic_creds_destroy(&s->dynamic_creds);
1485
1486 /* Try to delete the pid file. At this point it will be
1487 * out-of-date, and some software might be confused by it, so
1488 * let's remove it. */
1489 if (s->pid_file)
1490 (void) unlink(s->pid_file);
1491
1492 return;
1493
1494 fail:
1495 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1496 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1497 }
1498
1499 static void service_enter_stop_post(Service *s, ServiceResult f) {
1500 int r;
1501 assert(s);
1502
1503 if (s->result == SERVICE_SUCCESS)
1504 s->result = f;
1505
1506 service_unwatch_control_pid(s);
1507 unit_watch_all_pids(UNIT(s));
1508
1509 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1510 if (s->control_command) {
1511 s->control_command_id = SERVICE_EXEC_STOP_POST;
1512
1513 r = service_spawn(s,
1514 s->control_command,
1515 s->timeout_stop_usec,
1516 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1517 &s->control_pid);
1518 if (r < 0)
1519 goto fail;
1520
1521 service_set_state(s, SERVICE_STOP_POST);
1522 } else
1523 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1524
1525 return;
1526
1527 fail:
1528 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1529 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1530 }
1531
1532 static int state_to_kill_operation(ServiceState state) {
1533 switch (state) {
1534
1535 case SERVICE_STOP_SIGABRT:
1536 return KILL_ABORT;
1537
1538 case SERVICE_STOP_SIGTERM:
1539 case SERVICE_FINAL_SIGTERM:
1540 return KILL_TERMINATE;
1541
1542 case SERVICE_STOP_SIGKILL:
1543 case SERVICE_FINAL_SIGKILL:
1544 return KILL_KILL;
1545
1546 default:
1547 return _KILL_OPERATION_INVALID;
1548 }
1549 }
1550
1551 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1552 int r;
1553
1554 assert(s);
1555
1556 if (s->result == SERVICE_SUCCESS)
1557 s->result = f;
1558
1559 unit_watch_all_pids(UNIT(s));
1560
1561 r = unit_kill_context(
1562 UNIT(s),
1563 &s->kill_context,
1564 state_to_kill_operation(state),
1565 s->main_pid,
1566 s->control_pid,
1567 s->main_pid_alien);
1568
1569 if (r < 0)
1570 goto fail;
1571
1572 if (r > 0) {
1573 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1574 if (r < 0)
1575 goto fail;
1576
1577 service_set_state(s, state);
1578 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1579 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1580 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1581 service_enter_stop_post(s, SERVICE_SUCCESS);
1582 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1583 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1584 else
1585 service_enter_dead(s, SERVICE_SUCCESS, true);
1586
1587 return;
1588
1589 fail:
1590 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1591
1592 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1593 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1594 else
1595 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1596 }
1597
1598 static void service_enter_stop_by_notify(Service *s) {
1599 assert(s);
1600
1601 unit_watch_all_pids(UNIT(s));
1602
1603 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1604
1605 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1606 service_set_state(s, SERVICE_STOP_SIGTERM);
1607 }
1608
1609 static void service_enter_stop(Service *s, ServiceResult f) {
1610 int r;
1611
1612 assert(s);
1613
1614 if (s->result == SERVICE_SUCCESS)
1615 s->result = f;
1616
1617 service_unwatch_control_pid(s);
1618 unit_watch_all_pids(UNIT(s));
1619
1620 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1621 if (s->control_command) {
1622 s->control_command_id = SERVICE_EXEC_STOP;
1623
1624 r = service_spawn(s,
1625 s->control_command,
1626 s->timeout_stop_usec,
1627 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1628 &s->control_pid);
1629 if (r < 0)
1630 goto fail;
1631
1632 service_set_state(s, SERVICE_STOP);
1633 } else
1634 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1635
1636 return;
1637
1638 fail:
1639 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1640 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1641 }
1642
1643 static bool service_good(Service *s) {
1644 int main_pid_ok;
1645 assert(s);
1646
1647 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1648 return false;
1649
1650 main_pid_ok = main_pid_good(s);
1651 if (main_pid_ok > 0) /* It's alive */
1652 return true;
1653 if (main_pid_ok == 0) /* It's dead */
1654 return false;
1655
1656 /* OK, we don't know anything about the main PID, maybe
1657 * because there is none. Let's check the control group
1658 * instead. */
1659
1660 return cgroup_good(s) != 0;
1661 }
1662
1663 static void service_enter_running(Service *s, ServiceResult f) {
1664 assert(s);
1665
1666 if (s->result == SERVICE_SUCCESS)
1667 s->result = f;
1668
1669 service_unwatch_control_pid(s);
1670
1671 if (service_good(s)) {
1672
1673 /* If there are any queued up sd_notify()
1674 * notifications, process them now */
1675 if (s->notify_state == NOTIFY_RELOADING)
1676 service_enter_reload_by_notify(s);
1677 else if (s->notify_state == NOTIFY_STOPPING)
1678 service_enter_stop_by_notify(s);
1679 else {
1680 service_set_state(s, SERVICE_RUNNING);
1681 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1682 }
1683
1684 } else if (s->remain_after_exit)
1685 service_set_state(s, SERVICE_EXITED);
1686 else
1687 service_enter_stop(s, SERVICE_SUCCESS);
1688 }
1689
1690 static void service_enter_start_post(Service *s) {
1691 int r;
1692 assert(s);
1693
1694 service_unwatch_control_pid(s);
1695 service_reset_watchdog(s);
1696
1697 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1698 if (s->control_command) {
1699 s->control_command_id = SERVICE_EXEC_START_POST;
1700
1701 r = service_spawn(s,
1702 s->control_command,
1703 s->timeout_start_usec,
1704 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1705 &s->control_pid);
1706 if (r < 0)
1707 goto fail;
1708
1709 service_set_state(s, SERVICE_START_POST);
1710 } else
1711 service_enter_running(s, SERVICE_SUCCESS);
1712
1713 return;
1714
1715 fail:
1716 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1717 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1718 }
1719
1720 static void service_kill_control_processes(Service *s) {
1721 char *p;
1722
1723 if (!UNIT(s)->cgroup_path)
1724 return;
1725
1726 p = strjoina(UNIT(s)->cgroup_path, "/control");
1727 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, NULL);
1728 }
1729
1730 static void service_enter_start(Service *s) {
1731 ExecCommand *c;
1732 usec_t timeout;
1733 pid_t pid;
1734 int r;
1735
1736 assert(s);
1737
1738 service_unwatch_control_pid(s);
1739 service_unwatch_main_pid(s);
1740
1741 /* We want to ensure that nobody leaks processes from
1742 * START_PRE here, so let's go on a killing spree, People
1743 * should not spawn long running processes from START_PRE. */
1744 service_kill_control_processes(s);
1745
1746 if (s->type == SERVICE_FORKING) {
1747 s->control_command_id = SERVICE_EXEC_START;
1748 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1749
1750 s->main_command = NULL;
1751 } else {
1752 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1753 s->control_command = NULL;
1754
1755 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1756 }
1757
1758 if (!c) {
1759 assert(s->type == SERVICE_ONESHOT);
1760 service_enter_start_post(s);
1761 return;
1762 }
1763
1764 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1765 /* For simple + idle this is the main process. We don't apply any timeout here, but
1766 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1767 timeout = USEC_INFINITY;
1768 else
1769 timeout = s->timeout_start_usec;
1770
1771 r = service_spawn(s,
1772 c,
1773 timeout,
1774 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1775 &pid);
1776 if (r < 0)
1777 goto fail;
1778
1779 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1780 /* For simple services we immediately start
1781 * the START_POST binaries. */
1782
1783 service_set_main_pid(s, pid);
1784 service_enter_start_post(s);
1785
1786 } else if (s->type == SERVICE_FORKING) {
1787
1788 /* For forking services we wait until the start
1789 * process exited. */
1790
1791 s->control_pid = pid;
1792 service_set_state(s, SERVICE_START);
1793
1794 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1795
1796 /* For oneshot services we wait until the start
1797 * process exited, too, but it is our main process. */
1798
1799 /* For D-Bus services we know the main pid right away,
1800 * but wait for the bus name to appear on the
1801 * bus. Notify services are similar. */
1802
1803 service_set_main_pid(s, pid);
1804 service_set_state(s, SERVICE_START);
1805 } else
1806 assert_not_reached("Unknown service type");
1807
1808 return;
1809
1810 fail:
1811 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1812 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1813 }
1814
1815 static void service_enter_start_pre(Service *s) {
1816 int r;
1817
1818 assert(s);
1819
1820 service_unwatch_control_pid(s);
1821
1822 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1823 if (s->control_command) {
1824 /* Before we start anything, let's clear up what might
1825 * be left from previous runs. */
1826 service_kill_control_processes(s);
1827
1828 s->control_command_id = SERVICE_EXEC_START_PRE;
1829
1830 r = service_spawn(s,
1831 s->control_command,
1832 s->timeout_start_usec,
1833 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1834 &s->control_pid);
1835 if (r < 0)
1836 goto fail;
1837
1838 service_set_state(s, SERVICE_START_PRE);
1839 } else
1840 service_enter_start(s);
1841
1842 return;
1843
1844 fail:
1845 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1846 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1847 }
1848
1849 static void service_enter_restart(Service *s) {
1850 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1851 int r;
1852
1853 assert(s);
1854
1855 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1856 /* Don't restart things if we are going down anyway */
1857 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1858
1859 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1860 if (r < 0)
1861 goto fail;
1862
1863 return;
1864 }
1865
1866 /* Any units that are bound to this service must also be
1867 * restarted. We use JOB_RESTART (instead of the more obvious
1868 * JOB_START) here so that those dependency jobs will be added
1869 * as well. */
1870 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1871 if (r < 0)
1872 goto fail;
1873
1874 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1875 * it will be canceled as part of the service_stop() call that
1876 * is executed as part of JOB_RESTART. */
1877
1878 log_unit_debug(UNIT(s), "Scheduled restart job.");
1879 return;
1880
1881 fail:
1882 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
1883 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1884 }
1885
1886 static void service_enter_reload_by_notify(Service *s) {
1887 assert(s);
1888
1889 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
1890 service_set_state(s, SERVICE_RELOAD);
1891 }
1892
1893 static void service_enter_reload(Service *s) {
1894 int r;
1895
1896 assert(s);
1897
1898 service_unwatch_control_pid(s);
1899 s->reload_result = SERVICE_SUCCESS;
1900
1901 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1902 if (s->control_command) {
1903 s->control_command_id = SERVICE_EXEC_RELOAD;
1904
1905 r = service_spawn(s,
1906 s->control_command,
1907 s->timeout_start_usec,
1908 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1909 &s->control_pid);
1910 if (r < 0)
1911 goto fail;
1912
1913 service_set_state(s, SERVICE_RELOAD);
1914 } else
1915 service_enter_running(s, SERVICE_SUCCESS);
1916
1917 return;
1918
1919 fail:
1920 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
1921 s->reload_result = SERVICE_FAILURE_RESOURCES;
1922 service_enter_running(s, SERVICE_SUCCESS);
1923 }
1924
1925 static void service_run_next_control(Service *s) {
1926 usec_t timeout;
1927 int r;
1928
1929 assert(s);
1930 assert(s->control_command);
1931 assert(s->control_command->command_next);
1932
1933 assert(s->control_command_id != SERVICE_EXEC_START);
1934
1935 s->control_command = s->control_command->command_next;
1936 service_unwatch_control_pid(s);
1937
1938 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1939 timeout = s->timeout_start_usec;
1940 else
1941 timeout = s->timeout_stop_usec;
1942
1943 r = service_spawn(s,
1944 s->control_command,
1945 timeout,
1946 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
1947 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
1948 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
1949 &s->control_pid);
1950 if (r < 0)
1951 goto fail;
1952
1953 return;
1954
1955 fail:
1956 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
1957
1958 if (s->state == SERVICE_START_PRE)
1959 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1960 else if (s->state == SERVICE_STOP)
1961 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1962 else if (s->state == SERVICE_STOP_POST)
1963 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1964 else if (s->state == SERVICE_RELOAD) {
1965 s->reload_result = SERVICE_FAILURE_RESOURCES;
1966 service_enter_running(s, SERVICE_SUCCESS);
1967 } else
1968 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1969 }
1970
1971 static void service_run_next_main(Service *s) {
1972 pid_t pid;
1973 int r;
1974
1975 assert(s);
1976 assert(s->main_command);
1977 assert(s->main_command->command_next);
1978 assert(s->type == SERVICE_ONESHOT);
1979
1980 s->main_command = s->main_command->command_next;
1981 service_unwatch_main_pid(s);
1982
1983 r = service_spawn(s,
1984 s->main_command,
1985 s->timeout_start_usec,
1986 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1987 &pid);
1988 if (r < 0)
1989 goto fail;
1990
1991 service_set_main_pid(s, pid);
1992
1993 return;
1994
1995 fail:
1996 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
1997 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1998 }
1999
2000 static int service_start(Unit *u) {
2001 Service *s = SERVICE(u);
2002 int r;
2003
2004 assert(s);
2005
2006 /* We cannot fulfill this request right now, try again later
2007 * please! */
2008 if (IN_SET(s->state,
2009 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2010 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2011 return -EAGAIN;
2012
2013 /* Already on it! */
2014 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2015 return 0;
2016
2017 /* A service that will be restarted must be stopped first to
2018 * trigger BindsTo and/or OnFailure dependencies. If a user
2019 * does not want to wait for the holdoff time to elapse, the
2020 * service should be manually restarted, not started. We
2021 * simply return EAGAIN here, so that any start jobs stay
2022 * queued, and assume that the auto restart timer will
2023 * eventually trigger the restart. */
2024 if (s->state == SERVICE_AUTO_RESTART)
2025 return -EAGAIN;
2026
2027 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2028
2029 /* Make sure we don't enter a busy loop of some kind. */
2030 r = unit_start_limit_test(u);
2031 if (r < 0) {
2032 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2033 return r;
2034 }
2035
2036 r = unit_acquire_invocation_id(u);
2037 if (r < 0)
2038 return r;
2039
2040 s->result = SERVICE_SUCCESS;
2041 s->reload_result = SERVICE_SUCCESS;
2042 s->main_pid_known = false;
2043 s->main_pid_alien = false;
2044 s->forbid_restart = false;
2045 s->reset_cpu_usage = true;
2046
2047 s->status_text = mfree(s->status_text);
2048 s->status_errno = 0;
2049
2050 s->notify_state = NOTIFY_UNKNOWN;
2051
2052 s->watchdog_override_enable = false;
2053 s->watchdog_override_usec = 0;
2054
2055 service_enter_start_pre(s);
2056 return 1;
2057 }
2058
2059 static int service_stop(Unit *u) {
2060 Service *s = SERVICE(u);
2061
2062 assert(s);
2063
2064 /* Don't create restart jobs from manual stops. */
2065 s->forbid_restart = true;
2066
2067 /* Already on it */
2068 if (IN_SET(s->state,
2069 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2070 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2071 return 0;
2072
2073 /* A restart will be scheduled or is in progress. */
2074 if (s->state == SERVICE_AUTO_RESTART) {
2075 service_set_state(s, SERVICE_DEAD);
2076 return 0;
2077 }
2078
2079 /* If there's already something running we go directly into
2080 * kill mode. */
2081 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2082 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2083 return 0;
2084 }
2085
2086 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2087
2088 service_enter_stop(s, SERVICE_SUCCESS);
2089 return 1;
2090 }
2091
2092 static int service_reload(Unit *u) {
2093 Service *s = SERVICE(u);
2094
2095 assert(s);
2096
2097 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2098
2099 service_enter_reload(s);
2100 return 1;
2101 }
2102
2103 _pure_ static bool service_can_reload(Unit *u) {
2104 Service *s = SERVICE(u);
2105
2106 assert(s);
2107
2108 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2109 }
2110
2111 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2112 Service *s = SERVICE(u);
2113 ServiceFDStore *fs;
2114 int r;
2115
2116 assert(u);
2117 assert(f);
2118 assert(fds);
2119
2120 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2121 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2122 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2123
2124 if (s->control_pid > 0)
2125 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2126
2127 if (s->main_pid_known && s->main_pid > 0)
2128 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2129
2130 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2131 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2132 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2133
2134 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2135 if (r < 0)
2136 return r;
2137
2138 /* FIXME: There's a minor uncleanliness here: if there are
2139 * multiple commands attached here, we will start from the
2140 * first one again */
2141 if (s->control_command_id >= 0)
2142 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2143
2144 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2145 if (r < 0)
2146 return r;
2147 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2148 if (r < 0)
2149 return r;
2150 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2151 if (r < 0)
2152 return r;
2153
2154 if (UNIT_ISSET(s->accept_socket)) {
2155 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2156 if (r < 0)
2157 return r;
2158 }
2159
2160 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2161 if (r < 0)
2162 return r;
2163
2164 LIST_FOREACH(fd_store, fs, s->fd_store) {
2165 _cleanup_free_ char *c = NULL;
2166 int copy;
2167
2168 copy = fdset_put_dup(fds, fs->fd);
2169 if (copy < 0)
2170 return copy;
2171
2172 c = cescape(fs->fdname);
2173
2174 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2175 }
2176
2177 if (s->main_exec_status.pid > 0) {
2178 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2179 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2180 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2181
2182 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2183 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2184 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2185 }
2186 }
2187
2188 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2189
2190 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2191
2192 if (s->watchdog_override_enable)
2193 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2194
2195 return 0;
2196 }
2197
2198 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2199 Service *s = SERVICE(u);
2200 int r;
2201
2202 assert(u);
2203 assert(key);
2204 assert(value);
2205 assert(fds);
2206
2207 if (streq(key, "state")) {
2208 ServiceState state;
2209
2210 state = service_state_from_string(value);
2211 if (state < 0)
2212 log_unit_debug(u, "Failed to parse state value: %s", value);
2213 else
2214 s->deserialized_state = state;
2215 } else if (streq(key, "result")) {
2216 ServiceResult f;
2217
2218 f = service_result_from_string(value);
2219 if (f < 0)
2220 log_unit_debug(u, "Failed to parse result value: %s", value);
2221 else if (f != SERVICE_SUCCESS)
2222 s->result = f;
2223
2224 } else if (streq(key, "reload-result")) {
2225 ServiceResult f;
2226
2227 f = service_result_from_string(value);
2228 if (f < 0)
2229 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2230 else if (f != SERVICE_SUCCESS)
2231 s->reload_result = f;
2232
2233 } else if (streq(key, "control-pid")) {
2234 pid_t pid;
2235
2236 if (parse_pid(value, &pid) < 0)
2237 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2238 else
2239 s->control_pid = pid;
2240 } else if (streq(key, "main-pid")) {
2241 pid_t pid;
2242
2243 if (parse_pid(value, &pid) < 0)
2244 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2245 else {
2246 service_set_main_pid(s, pid);
2247 unit_watch_pid(UNIT(s), pid);
2248 }
2249 } else if (streq(key, "main-pid-known")) {
2250 int b;
2251
2252 b = parse_boolean(value);
2253 if (b < 0)
2254 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2255 else
2256 s->main_pid_known = b;
2257 } else if (streq(key, "bus-name-good")) {
2258 int b;
2259
2260 b = parse_boolean(value);
2261 if (b < 0)
2262 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2263 else
2264 s->bus_name_good = b;
2265 } else if (streq(key, "bus-name-owner")) {
2266 r = free_and_strdup(&s->bus_name_owner, value);
2267 if (r < 0)
2268 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2269 } else if (streq(key, "status-text")) {
2270 char *t;
2271
2272 r = cunescape(value, 0, &t);
2273 if (r < 0)
2274 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2275 else {
2276 free(s->status_text);
2277 s->status_text = t;
2278 }
2279
2280 } else if (streq(key, "control-command")) {
2281 ServiceExecCommand id;
2282
2283 id = service_exec_command_from_string(value);
2284 if (id < 0)
2285 log_unit_debug(u, "Failed to parse exec-command value: %s", value);
2286 else {
2287 s->control_command_id = id;
2288 s->control_command = s->exec_command[id];
2289 }
2290 } else if (streq(key, "accept-socket")) {
2291 Unit *socket;
2292
2293 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2294 if (r < 0)
2295 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2296 else {
2297 unit_ref_set(&s->accept_socket, socket);
2298 SOCKET(socket)->n_connections++;
2299 }
2300
2301 } else if (streq(key, "socket-fd")) {
2302 int fd;
2303
2304 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2305 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2306 else {
2307 asynchronous_close(s->socket_fd);
2308 s->socket_fd = fdset_remove(fds, fd);
2309 }
2310 } else if (streq(key, "fd-store-fd")) {
2311 const char *fdv;
2312 size_t pf;
2313 int fd;
2314
2315 pf = strcspn(value, WHITESPACE);
2316 fdv = strndupa(value, pf);
2317
2318 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2319 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2320 else {
2321 _cleanup_free_ char *t = NULL;
2322 const char *fdn;
2323
2324 fdn = value + pf;
2325 fdn += strspn(fdn, WHITESPACE);
2326 (void) cunescape(fdn, 0, &t);
2327
2328 r = service_add_fd_store(s, fd, t);
2329 if (r < 0)
2330 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2331 else if (r > 0)
2332 fdset_remove(fds, fd);
2333 }
2334
2335 } else if (streq(key, "main-exec-status-pid")) {
2336 pid_t pid;
2337
2338 if (parse_pid(value, &pid) < 0)
2339 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2340 else
2341 s->main_exec_status.pid = pid;
2342 } else if (streq(key, "main-exec-status-code")) {
2343 int i;
2344
2345 if (safe_atoi(value, &i) < 0)
2346 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2347 else
2348 s->main_exec_status.code = i;
2349 } else if (streq(key, "main-exec-status-status")) {
2350 int i;
2351
2352 if (safe_atoi(value, &i) < 0)
2353 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2354 else
2355 s->main_exec_status.status = i;
2356 } else if (streq(key, "main-exec-status-start"))
2357 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2358 else if (streq(key, "main-exec-status-exit"))
2359 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2360 else if (streq(key, "watchdog-timestamp"))
2361 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2362 else if (streq(key, "forbid-restart")) {
2363 int b;
2364
2365 b = parse_boolean(value);
2366 if (b < 0)
2367 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2368 else
2369 s->forbid_restart = b;
2370 } else if (streq(key, "stdin-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 stdin-fd value: %s", value);
2375 else {
2376 asynchronous_close(s->stdin_fd);
2377 s->stdin_fd = fdset_remove(fds, fd);
2378 s->exec_context.stdio_as_fds = true;
2379 }
2380 } else if (streq(key, "stdout-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 stdout-fd value: %s", value);
2385 else {
2386 asynchronous_close(s->stdout_fd);
2387 s->stdout_fd = fdset_remove(fds, fd);
2388 s->exec_context.stdio_as_fds = true;
2389 }
2390 } else if (streq(key, "stderr-fd")) {
2391 int fd;
2392
2393 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2394 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2395 else {
2396 asynchronous_close(s->stderr_fd);
2397 s->stderr_fd = fdset_remove(fds, fd);
2398 s->exec_context.stdio_as_fds = true;
2399 }
2400 } else if (streq(key, "watchdog-override-usec")) {
2401 usec_t watchdog_override_usec;
2402 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2403 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2404 else {
2405 s->watchdog_override_enable = true;
2406 s->watchdog_override_usec = watchdog_override_usec;
2407 }
2408 } else
2409 log_unit_debug(u, "Unknown serialization key: %s", key);
2410
2411 return 0;
2412 }
2413
2414 _pure_ static UnitActiveState service_active_state(Unit *u) {
2415 const UnitActiveState *table;
2416
2417 assert(u);
2418
2419 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2420
2421 return table[SERVICE(u)->state];
2422 }
2423
2424 static const char *service_sub_state_to_string(Unit *u) {
2425 assert(u);
2426
2427 return service_state_to_string(SERVICE(u)->state);
2428 }
2429
2430 static bool service_check_gc(Unit *u) {
2431 Service *s = SERVICE(u);
2432
2433 assert(s);
2434
2435 /* Never clean up services that still have a process around,
2436 * even if the service is formally dead. */
2437 if (cgroup_good(s) > 0 ||
2438 main_pid_good(s) > 0 ||
2439 control_pid_good(s) > 0)
2440 return true;
2441
2442 return false;
2443 }
2444
2445 static int service_retry_pid_file(Service *s) {
2446 int r;
2447
2448 assert(s->pid_file);
2449 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2450
2451 r = service_load_pid_file(s, false);
2452 if (r < 0)
2453 return r;
2454
2455 service_unwatch_pid_file(s);
2456
2457 service_enter_running(s, SERVICE_SUCCESS);
2458 return 0;
2459 }
2460
2461 static int service_watch_pid_file(Service *s) {
2462 int r;
2463
2464 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2465
2466 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2467 if (r < 0)
2468 goto fail;
2469
2470 /* the pidfile might have appeared just before we set the watch */
2471 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2472 service_retry_pid_file(s);
2473
2474 return 0;
2475 fail:
2476 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2477 service_unwatch_pid_file(s);
2478 return r;
2479 }
2480
2481 static int service_demand_pid_file(Service *s) {
2482 PathSpec *ps;
2483
2484 assert(s->pid_file);
2485 assert(!s->pid_file_pathspec);
2486
2487 ps = new0(PathSpec, 1);
2488 if (!ps)
2489 return -ENOMEM;
2490
2491 ps->unit = UNIT(s);
2492 ps->path = strdup(s->pid_file);
2493 if (!ps->path) {
2494 free(ps);
2495 return -ENOMEM;
2496 }
2497
2498 path_kill_slashes(ps->path);
2499
2500 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2501 * keep their PID file open all the time. */
2502 ps->type = PATH_MODIFIED;
2503 ps->inotify_fd = -1;
2504
2505 s->pid_file_pathspec = ps;
2506
2507 return service_watch_pid_file(s);
2508 }
2509
2510 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2511 PathSpec *p = userdata;
2512 Service *s;
2513
2514 assert(p);
2515
2516 s = SERVICE(p->unit);
2517
2518 assert(s);
2519 assert(fd >= 0);
2520 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2521 assert(s->pid_file_pathspec);
2522 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2523
2524 log_unit_debug(UNIT(s), "inotify event");
2525
2526 if (path_spec_fd_event(p, events) < 0)
2527 goto fail;
2528
2529 if (service_retry_pid_file(s) == 0)
2530 return 0;
2531
2532 if (service_watch_pid_file(s) < 0)
2533 goto fail;
2534
2535 return 0;
2536
2537 fail:
2538 service_unwatch_pid_file(s);
2539 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2540 return 0;
2541 }
2542
2543 static void service_notify_cgroup_empty_event(Unit *u) {
2544 Service *s = SERVICE(u);
2545
2546 assert(u);
2547
2548 log_unit_debug(u, "cgroup is empty");
2549
2550 switch (s->state) {
2551
2552 /* Waiting for SIGCHLD is usually more interesting,
2553 * because it includes return codes/signals. Which is
2554 * why we ignore the cgroup events for most cases,
2555 * except when we don't know pid which to expect the
2556 * SIGCHLD for. */
2557
2558 case SERVICE_START:
2559 case SERVICE_START_POST:
2560 /* If we were hoping for the daemon to write its PID file,
2561 * we can give up now. */
2562 if (s->pid_file_pathspec) {
2563 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2564
2565 service_unwatch_pid_file(s);
2566 if (s->state == SERVICE_START)
2567 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2568 else
2569 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2570 }
2571 break;
2572
2573 case SERVICE_RUNNING:
2574 /* service_enter_running() will figure out what to do */
2575 service_enter_running(s, SERVICE_SUCCESS);
2576 break;
2577
2578 case SERVICE_STOP_SIGABRT:
2579 case SERVICE_STOP_SIGTERM:
2580 case SERVICE_STOP_SIGKILL:
2581
2582 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2583 service_enter_stop_post(s, SERVICE_SUCCESS);
2584
2585 break;
2586
2587 case SERVICE_STOP_POST:
2588 case SERVICE_FINAL_SIGTERM:
2589 case SERVICE_FINAL_SIGKILL:
2590 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2591 service_enter_dead(s, SERVICE_SUCCESS, true);
2592
2593 break;
2594
2595 default:
2596 ;
2597 }
2598 }
2599
2600 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2601 Service *s = SERVICE(u);
2602 ServiceResult f;
2603
2604 assert(s);
2605 assert(pid >= 0);
2606
2607 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
2608 f = SERVICE_SUCCESS;
2609 else if (code == CLD_EXITED)
2610 f = SERVICE_FAILURE_EXIT_CODE;
2611 else if (code == CLD_KILLED)
2612 f = SERVICE_FAILURE_SIGNAL;
2613 else if (code == CLD_DUMPED)
2614 f = SERVICE_FAILURE_CORE_DUMP;
2615 else
2616 assert_not_reached("Unknown code");
2617
2618 if (s->main_pid == pid) {
2619 /* Forking services may occasionally move to a new PID.
2620 * As long as they update the PID file before exiting the old
2621 * PID, they're fine. */
2622 if (service_load_pid_file(s, false) == 0)
2623 return;
2624
2625 s->main_pid = 0;
2626 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2627
2628 if (s->main_command) {
2629 /* If this is not a forking service than the
2630 * main process got started and hence we copy
2631 * the exit status so that it is recorded both
2632 * as main and as control process exit
2633 * status */
2634
2635 s->main_command->exec_status = s->main_exec_status;
2636
2637 if (s->main_command->ignore)
2638 f = SERVICE_SUCCESS;
2639 } else if (s->exec_command[SERVICE_EXEC_START]) {
2640
2641 /* If this is a forked process, then we should
2642 * ignore the return value if this was
2643 * configured for the starter process */
2644
2645 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2646 f = SERVICE_SUCCESS;
2647 }
2648
2649 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
2650 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
2651 * that the service already logged the reason at a higher log level on its own. However, if the service
2652 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
2653 * our log level to WARNING then. */
2654
2655 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
2656 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
2657 LOG_UNIT_ID(u),
2658 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2659 sigchld_code_to_string(code), status,
2660 strna(code == CLD_EXITED
2661 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2662 : signal_to_string(status))),
2663 "EXIT_CODE=%s", sigchld_code_to_string(code),
2664 "EXIT_STATUS=%i", status,
2665 NULL);
2666
2667 if (s->result == SERVICE_SUCCESS)
2668 s->result = f;
2669
2670 if (s->main_command &&
2671 s->main_command->command_next &&
2672 f == SERVICE_SUCCESS) {
2673
2674 /* There is another command to *
2675 * execute, so let's do that. */
2676
2677 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2678 service_run_next_main(s);
2679
2680 } else {
2681
2682 /* The service exited, so the service is officially
2683 * gone. */
2684 s->main_command = NULL;
2685
2686 switch (s->state) {
2687
2688 case SERVICE_START_POST:
2689 case SERVICE_RELOAD:
2690 case SERVICE_STOP:
2691 /* Need to wait until the operation is
2692 * done */
2693 break;
2694
2695 case SERVICE_START:
2696 if (s->type == SERVICE_ONESHOT) {
2697 /* This was our main goal, so let's go on */
2698 if (f == SERVICE_SUCCESS)
2699 service_enter_start_post(s);
2700 else
2701 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2702 break;
2703 }
2704
2705 /* Fall through */
2706
2707 case SERVICE_RUNNING:
2708 service_enter_running(s, f);
2709 break;
2710
2711 case SERVICE_STOP_SIGABRT:
2712 case SERVICE_STOP_SIGTERM:
2713 case SERVICE_STOP_SIGKILL:
2714
2715 if (!control_pid_good(s))
2716 service_enter_stop_post(s, f);
2717
2718 /* If there is still a control process, wait for that first */
2719 break;
2720
2721 case SERVICE_STOP_POST:
2722 case SERVICE_FINAL_SIGTERM:
2723 case SERVICE_FINAL_SIGKILL:
2724
2725 if (!control_pid_good(s))
2726 service_enter_dead(s, f, true);
2727 break;
2728
2729 default:
2730 assert_not_reached("Uh, main process died at wrong time.");
2731 }
2732 }
2733
2734 } else if (s->control_pid == pid) {
2735 s->control_pid = 0;
2736
2737 if (s->control_command) {
2738 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2739
2740 if (s->control_command->ignore)
2741 f = SERVICE_SUCCESS;
2742 }
2743
2744 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
2745 "Control process exited, code=%s status=%i",
2746 sigchld_code_to_string(code), status);
2747
2748 if (s->result == SERVICE_SUCCESS)
2749 s->result = f;
2750
2751 /* Immediately get rid of the cgroup, so that the
2752 * kernel doesn't delay the cgroup empty messages for
2753 * the service cgroup any longer than necessary */
2754 service_kill_control_processes(s);
2755
2756 if (s->control_command &&
2757 s->control_command->command_next &&
2758 f == SERVICE_SUCCESS) {
2759
2760 /* There is another command to *
2761 * execute, so let's do that. */
2762
2763 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
2764 service_run_next_control(s);
2765
2766 } else {
2767 /* No further commands for this step, so let's
2768 * figure out what to do next */
2769
2770 s->control_command = NULL;
2771 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2772
2773 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
2774
2775 switch (s->state) {
2776
2777 case SERVICE_START_PRE:
2778 if (f == SERVICE_SUCCESS)
2779 service_enter_start(s);
2780 else
2781 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2782 break;
2783
2784 case SERVICE_START:
2785 if (s->type != SERVICE_FORKING)
2786 /* Maybe spurious event due to a reload that changed the type? */
2787 break;
2788
2789 if (f != SERVICE_SUCCESS) {
2790 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2791 break;
2792 }
2793
2794 if (s->pid_file) {
2795 bool has_start_post;
2796 int r;
2797
2798 /* Let's try to load the pid file here if we can.
2799 * The PID file might actually be created by a START_POST
2800 * script. In that case don't worry if the loading fails. */
2801
2802 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2803 r = service_load_pid_file(s, !has_start_post);
2804 if (!has_start_post && r < 0) {
2805 r = service_demand_pid_file(s);
2806 if (r < 0 || !cgroup_good(s))
2807 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2808 break;
2809 }
2810 } else
2811 service_search_main_pid(s);
2812
2813 service_enter_start_post(s);
2814 break;
2815
2816 case SERVICE_START_POST:
2817 if (f != SERVICE_SUCCESS) {
2818 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2819 break;
2820 }
2821
2822 if (s->pid_file) {
2823 int r;
2824
2825 r = service_load_pid_file(s, true);
2826 if (r < 0) {
2827 r = service_demand_pid_file(s);
2828 if (r < 0 || !cgroup_good(s))
2829 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2830 break;
2831 }
2832 } else
2833 service_search_main_pid(s);
2834
2835 service_enter_running(s, SERVICE_SUCCESS);
2836 break;
2837
2838 case SERVICE_RELOAD:
2839 if (f == SERVICE_SUCCESS)
2840 if (service_load_pid_file(s, true) < 0)
2841 service_search_main_pid(s);
2842
2843 s->reload_result = f;
2844 service_enter_running(s, SERVICE_SUCCESS);
2845 break;
2846
2847 case SERVICE_STOP:
2848 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2849 break;
2850
2851 case SERVICE_STOP_SIGABRT:
2852 case SERVICE_STOP_SIGTERM:
2853 case SERVICE_STOP_SIGKILL:
2854 if (main_pid_good(s) <= 0)
2855 service_enter_stop_post(s, f);
2856
2857 /* If there is still a service
2858 * process around, wait until
2859 * that one quit, too */
2860 break;
2861
2862 case SERVICE_STOP_POST:
2863 case SERVICE_FINAL_SIGTERM:
2864 case SERVICE_FINAL_SIGKILL:
2865 if (main_pid_good(s) <= 0)
2866 service_enter_dead(s, f, true);
2867 break;
2868
2869 default:
2870 assert_not_reached("Uh, control process died at wrong time.");
2871 }
2872 }
2873 }
2874
2875 /* Notify clients about changed exit status */
2876 unit_add_to_dbus_queue(u);
2877
2878 /* We got one SIGCHLD for the service, let's watch all
2879 * processes that are now running of the service, and watch
2880 * that. Among the PIDs we then watch will be children
2881 * reassigned to us, which hopefully allows us to identify
2882 * when all children are gone */
2883 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
2884 unit_watch_all_pids(u);
2885
2886 /* If the PID set is empty now, then let's finish this off
2887 (On unified we use proper notifications) */
2888 if (cg_unified(SYSTEMD_CGROUP_CONTROLLER) <= 0 && set_isempty(u->pids))
2889 service_notify_cgroup_empty_event(u);
2890 }
2891
2892 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
2893 Service *s = SERVICE(userdata);
2894
2895 assert(s);
2896 assert(source == s->timer_event_source);
2897
2898 switch (s->state) {
2899
2900 case SERVICE_START_PRE:
2901 case SERVICE_START:
2902 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
2903 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2904 break;
2905
2906 case SERVICE_START_POST:
2907 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
2908 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2909 break;
2910
2911 case SERVICE_RUNNING:
2912 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
2913 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
2914 break;
2915
2916 case SERVICE_RELOAD:
2917 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
2918 service_kill_control_processes(s);
2919 s->reload_result = SERVICE_FAILURE_TIMEOUT;
2920 service_enter_running(s, SERVICE_SUCCESS);
2921 break;
2922
2923 case SERVICE_STOP:
2924 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
2925 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2926 break;
2927
2928 case SERVICE_STOP_SIGABRT:
2929 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
2930 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2931 break;
2932
2933 case SERVICE_STOP_SIGTERM:
2934 if (s->kill_context.send_sigkill) {
2935 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
2936 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2937 } else {
2938 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
2939 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2940 }
2941
2942 break;
2943
2944 case SERVICE_STOP_SIGKILL:
2945 /* Uh, we sent a SIGKILL and it is still not gone?
2946 * Must be something we cannot kill, so let's just be
2947 * weirded out and continue */
2948
2949 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
2950 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2951 break;
2952
2953 case SERVICE_STOP_POST:
2954 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
2955 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2956 break;
2957
2958 case SERVICE_FINAL_SIGTERM:
2959 if (s->kill_context.send_sigkill) {
2960 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
2961 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2962 } else {
2963 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
2964 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
2965 }
2966
2967 break;
2968
2969 case SERVICE_FINAL_SIGKILL:
2970 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
2971 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
2972 break;
2973
2974 case SERVICE_AUTO_RESTART:
2975 log_unit_info(UNIT(s),
2976 s->restart_usec > 0 ?
2977 "Service hold-off time over, scheduling restart." :
2978 "Service has no hold-off time, scheduling restart.");
2979 service_enter_restart(s);
2980 break;
2981
2982 default:
2983 assert_not_reached("Timeout at wrong time.");
2984 }
2985
2986 return 0;
2987 }
2988
2989 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
2990 Service *s = SERVICE(userdata);
2991 char t[FORMAT_TIMESPAN_MAX];
2992 usec_t watchdog_usec;
2993
2994 assert(s);
2995 assert(source == s->watchdog_event_source);
2996
2997 watchdog_usec = service_get_watchdog_usec(s);
2998
2999 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3000 format_timespan(t, sizeof(t), watchdog_usec, 1));
3001
3002 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3003
3004 return 0;
3005 }
3006
3007 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
3008 Service *s = SERVICE(u);
3009 _cleanup_free_ char *cc = NULL;
3010 bool notify_dbus = false;
3011 const char *e;
3012
3013 assert(u);
3014
3015 cc = strv_join(tags, ", ");
3016
3017 if (s->notify_access == NOTIFY_NONE) {
3018 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3019 return;
3020 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3021 if (s->main_pid != 0)
3022 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3023 else
3024 log_unit_debug(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3025 return;
3026 } else
3027 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3028
3029 /* Interpret MAINPID= */
3030 e = strv_find_startswith(tags, "MAINPID=");
3031 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3032 if (parse_pid(e, &pid) < 0)
3033 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3034 else {
3035 service_set_main_pid(s, pid);
3036 unit_watch_pid(UNIT(s), pid);
3037 notify_dbus = true;
3038 }
3039 }
3040
3041 /* Interpret RELOADING= */
3042 if (strv_find(tags, "RELOADING=1")) {
3043
3044 s->notify_state = NOTIFY_RELOADING;
3045
3046 if (s->state == SERVICE_RUNNING)
3047 service_enter_reload_by_notify(s);
3048
3049 notify_dbus = true;
3050 }
3051
3052 /* Interpret READY= */
3053 if (strv_find(tags, "READY=1")) {
3054
3055 s->notify_state = NOTIFY_READY;
3056
3057 /* Type=notify services inform us about completed
3058 * initialization with READY=1 */
3059 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3060 service_enter_start_post(s);
3061
3062 /* Sending READY=1 while we are reloading informs us
3063 * that the reloading is complete */
3064 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3065 service_enter_running(s, SERVICE_SUCCESS);
3066
3067 notify_dbus = true;
3068 }
3069
3070 /* Interpret STOPPING= */
3071 if (strv_find(tags, "STOPPING=1")) {
3072
3073 s->notify_state = NOTIFY_STOPPING;
3074
3075 if (s->state == SERVICE_RUNNING)
3076 service_enter_stop_by_notify(s);
3077
3078 notify_dbus = true;
3079 }
3080
3081 /* Interpret STATUS= */
3082 e = strv_find_startswith(tags, "STATUS=");
3083 if (e) {
3084 _cleanup_free_ char *t = NULL;
3085
3086 if (!isempty(e)) {
3087 if (!utf8_is_valid(e))
3088 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3089 else {
3090 t = strdup(e);
3091 if (!t)
3092 log_oom();
3093 }
3094 }
3095
3096 if (!streq_ptr(s->status_text, t)) {
3097
3098 free_and_replace(s->status_text, t);
3099
3100 notify_dbus = true;
3101 }
3102 }
3103
3104 /* Interpret ERRNO= */
3105 e = strv_find_startswith(tags, "ERRNO=");
3106 if (e) {
3107 int status_errno;
3108
3109 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3110 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3111 else {
3112 if (s->status_errno != status_errno) {
3113 s->status_errno = status_errno;
3114 notify_dbus = true;
3115 }
3116 }
3117 }
3118
3119 /* Interpret WATCHDOG= */
3120 if (strv_find(tags, "WATCHDOG=1"))
3121 service_reset_watchdog(s);
3122
3123 if (strv_find(tags, "FDSTORE=1")) {
3124 const char *name;
3125
3126 name = strv_find_startswith(tags, "FDNAME=");
3127 if (name && !fdname_is_valid(name)) {
3128 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3129 name = NULL;
3130 }
3131
3132 service_add_fd_store_set(s, fds, name);
3133 }
3134
3135 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3136 if (e) {
3137 usec_t watchdog_override_usec;
3138 if (safe_atou64(e, &watchdog_override_usec) < 0)
3139 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3140 else
3141 service_reset_watchdog_timeout(s, watchdog_override_usec);
3142 }
3143
3144 /* Notify clients about changed status or main pid */
3145 if (notify_dbus)
3146 unit_add_to_dbus_queue(u);
3147 }
3148
3149 static int service_get_timeout(Unit *u, usec_t *timeout) {
3150 Service *s = SERVICE(u);
3151 uint64_t t;
3152 int r;
3153
3154 if (!s->timer_event_source)
3155 return 0;
3156
3157 r = sd_event_source_get_time(s->timer_event_source, &t);
3158 if (r < 0)
3159 return r;
3160 if (t == USEC_INFINITY)
3161 return 0;
3162
3163 *timeout = t;
3164 return 1;
3165 }
3166
3167 static void service_bus_name_owner_change(
3168 Unit *u,
3169 const char *name,
3170 const char *old_owner,
3171 const char *new_owner) {
3172
3173 Service *s = SERVICE(u);
3174 int r;
3175
3176 assert(s);
3177 assert(name);
3178
3179 assert(streq(s->bus_name, name));
3180 assert(old_owner || new_owner);
3181
3182 if (old_owner && new_owner)
3183 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3184 else if (old_owner)
3185 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3186 else
3187 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3188
3189 s->bus_name_good = !!new_owner;
3190
3191 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3192 r = free_and_strdup(&s->bus_name_owner, new_owner);
3193 if (r < 0) {
3194 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3195 return;
3196 }
3197
3198 if (s->type == SERVICE_DBUS) {
3199
3200 /* service_enter_running() will figure out what to
3201 * do */
3202 if (s->state == SERVICE_RUNNING)
3203 service_enter_running(s, SERVICE_SUCCESS);
3204 else if (s->state == SERVICE_START && new_owner)
3205 service_enter_start_post(s);
3206
3207 } else if (new_owner &&
3208 s->main_pid <= 0 &&
3209 (s->state == SERVICE_START ||
3210 s->state == SERVICE_START_POST ||
3211 s->state == SERVICE_RUNNING ||
3212 s->state == SERVICE_RELOAD)) {
3213
3214 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3215 pid_t pid;
3216
3217 /* Try to acquire PID from bus service */
3218
3219 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3220 if (r >= 0)
3221 r = sd_bus_creds_get_pid(creds, &pid);
3222 if (r >= 0) {
3223 log_unit_debug(u, "D-Bus name %s is now owned by process %u", name, (unsigned) pid);
3224
3225 service_set_main_pid(s, pid);
3226 unit_watch_pid(UNIT(s), pid);
3227 }
3228 }
3229 }
3230
3231 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3232 _cleanup_free_ char *peer = NULL;
3233 int r;
3234
3235 assert(s);
3236 assert(fd >= 0);
3237
3238 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3239 * to be configured. We take ownership of the passed fd on success. */
3240
3241 if (UNIT(s)->load_state != UNIT_LOADED)
3242 return -EINVAL;
3243
3244 if (s->socket_fd >= 0)
3245 return -EBUSY;
3246
3247 if (s->state != SERVICE_DEAD)
3248 return -EAGAIN;
3249
3250 if (getpeername_pretty(fd, true, &peer) >= 0) {
3251
3252 if (UNIT(s)->description) {
3253 _cleanup_free_ char *a;
3254
3255 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3256 if (!a)
3257 return -ENOMEM;
3258
3259 r = unit_set_description(UNIT(s), a);
3260 } else
3261 r = unit_set_description(UNIT(s), peer);
3262
3263 if (r < 0)
3264 return r;
3265 }
3266
3267 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3268 if (r < 0)
3269 return r;
3270
3271 s->socket_fd = fd;
3272 s->socket_fd_selinux_context_net = selinux_context_net;
3273
3274 unit_ref_set(&s->accept_socket, UNIT(sock));
3275 return 0;
3276 }
3277
3278 static void service_reset_failed(Unit *u) {
3279 Service *s = SERVICE(u);
3280
3281 assert(s);
3282
3283 if (s->state == SERVICE_FAILED)
3284 service_set_state(s, SERVICE_DEAD);
3285
3286 s->result = SERVICE_SUCCESS;
3287 s->reload_result = SERVICE_SUCCESS;
3288 }
3289
3290 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3291 Service *s = SERVICE(u);
3292
3293 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3294 }
3295
3296 static int service_main_pid(Unit *u) {
3297 Service *s = SERVICE(u);
3298
3299 assert(s);
3300
3301 return s->main_pid;
3302 }
3303
3304 static int service_control_pid(Unit *u) {
3305 Service *s = SERVICE(u);
3306
3307 assert(s);
3308
3309 return s->control_pid;
3310 }
3311
3312 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3313 [SERVICE_RESTART_NO] = "no",
3314 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3315 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3316 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3317 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3318 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3319 [SERVICE_RESTART_ALWAYS] = "always",
3320 };
3321
3322 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3323
3324 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3325 [SERVICE_SIMPLE] = "simple",
3326 [SERVICE_FORKING] = "forking",
3327 [SERVICE_ONESHOT] = "oneshot",
3328 [SERVICE_DBUS] = "dbus",
3329 [SERVICE_NOTIFY] = "notify",
3330 [SERVICE_IDLE] = "idle"
3331 };
3332
3333 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3334
3335 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3336 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3337 [SERVICE_EXEC_START] = "ExecStart",
3338 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3339 [SERVICE_EXEC_RELOAD] = "ExecReload",
3340 [SERVICE_EXEC_STOP] = "ExecStop",
3341 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3342 };
3343
3344 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3345
3346 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3347 [NOTIFY_NONE] = "none",
3348 [NOTIFY_MAIN] = "main",
3349 [NOTIFY_ALL] = "all"
3350 };
3351
3352 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3353
3354 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3355 [NOTIFY_UNKNOWN] = "unknown",
3356 [NOTIFY_READY] = "ready",
3357 [NOTIFY_RELOADING] = "reloading",
3358 [NOTIFY_STOPPING] = "stopping",
3359 };
3360
3361 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3362
3363 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3364 [SERVICE_SUCCESS] = "success",
3365 [SERVICE_FAILURE_RESOURCES] = "resources",
3366 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3367 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3368 [SERVICE_FAILURE_SIGNAL] = "signal",
3369 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3370 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3371 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3372 };
3373
3374 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3375
3376 const UnitVTable service_vtable = {
3377 .object_size = sizeof(Service),
3378 .exec_context_offset = offsetof(Service, exec_context),
3379 .cgroup_context_offset = offsetof(Service, cgroup_context),
3380 .kill_context_offset = offsetof(Service, kill_context),
3381 .exec_runtime_offset = offsetof(Service, exec_runtime),
3382 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3383
3384 .sections =
3385 "Unit\0"
3386 "Service\0"
3387 "Install\0",
3388 .private_section = "Service",
3389
3390 .init = service_init,
3391 .done = service_done,
3392 .load = service_load,
3393 .release_resources = service_release_resources,
3394
3395 .coldplug = service_coldplug,
3396
3397 .dump = service_dump,
3398
3399 .start = service_start,
3400 .stop = service_stop,
3401 .reload = service_reload,
3402
3403 .can_reload = service_can_reload,
3404
3405 .kill = service_kill,
3406
3407 .serialize = service_serialize,
3408 .deserialize_item = service_deserialize_item,
3409
3410 .active_state = service_active_state,
3411 .sub_state_to_string = service_sub_state_to_string,
3412
3413 .check_gc = service_check_gc,
3414
3415 .sigchld_event = service_sigchld_event,
3416
3417 .reset_failed = service_reset_failed,
3418
3419 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3420 .notify_message = service_notify_message,
3421
3422 .main_pid = service_main_pid,
3423 .control_pid = service_control_pid,
3424
3425 .bus_name_owner_change = service_bus_name_owner_change,
3426
3427 .bus_vtable = bus_service_vtable,
3428 .bus_set_property = bus_service_set_property,
3429 .bus_commit_properties = bus_service_commit_properties,
3430
3431 .get_timeout = service_get_timeout,
3432 .can_transient = true,
3433
3434 .status_message_formats = {
3435 .starting_stopping = {
3436 [0] = "Starting %s...",
3437 [1] = "Stopping %s...",
3438 },
3439 .finished_start_job = {
3440 [JOB_DONE] = "Started %s.",
3441 [JOB_FAILED] = "Failed to start %s.",
3442 },
3443 .finished_stop_job = {
3444 [JOB_DONE] = "Stopped %s.",
3445 [JOB_FAILED] = "Stopped (with error) %s.",
3446 },
3447 },
3448 };
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