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[thirdparty/systemd.git] / src / core / service.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
2 /***
3 This file is part of systemd.
4
5 Copyright 2010 Lennart Poettering
6 ***/
7
8 #include <errno.h>
9 #include <signal.h>
10 #include <unistd.h>
11
12 #include "sd-messages.h"
13
14 #include "alloc-util.h"
15 #include "async.h"
16 #include "bus-error.h"
17 #include "bus-kernel.h"
18 #include "bus-util.h"
19 #include "dbus-service.h"
20 #include "def.h"
21 #include "env-util.h"
22 #include "escape.h"
23 #include "exit-status.h"
24 #include "fd-util.h"
25 #include "fileio.h"
26 #include "format-util.h"
27 #include "fs-util.h"
28 #include "load-dropin.h"
29 #include "load-fragment.h"
30 #include "log.h"
31 #include "manager.h"
32 #include "parse-util.h"
33 #include "path-util.h"
34 #include "process-util.h"
35 #include "service.h"
36 #include "signal-util.h"
37 #include "special.h"
38 #include "stdio-util.h"
39 #include "string-table.h"
40 #include "string-util.h"
41 #include "strv.h"
42 #include "unit-name.h"
43 #include "unit.h"
44 #include "utf8.h"
45 #include "util.h"
46
47 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
48 [SERVICE_DEAD] = UNIT_INACTIVE,
49 [SERVICE_START_PRE] = UNIT_ACTIVATING,
50 [SERVICE_START] = UNIT_ACTIVATING,
51 [SERVICE_START_POST] = UNIT_ACTIVATING,
52 [SERVICE_RUNNING] = UNIT_ACTIVE,
53 [SERVICE_EXITED] = UNIT_ACTIVE,
54 [SERVICE_RELOAD] = UNIT_RELOADING,
55 [SERVICE_STOP] = UNIT_DEACTIVATING,
56 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
57 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
58 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
59 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
60 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
61 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
62 [SERVICE_FAILED] = UNIT_FAILED,
63 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
64 };
65
66 /* For Type=idle we never want to delay any other jobs, hence we
67 * consider idle jobs active as soon as we start working on them */
68 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
69 [SERVICE_DEAD] = UNIT_INACTIVE,
70 [SERVICE_START_PRE] = UNIT_ACTIVE,
71 [SERVICE_START] = UNIT_ACTIVE,
72 [SERVICE_START_POST] = UNIT_ACTIVE,
73 [SERVICE_RUNNING] = UNIT_ACTIVE,
74 [SERVICE_EXITED] = UNIT_ACTIVE,
75 [SERVICE_RELOAD] = UNIT_RELOADING,
76 [SERVICE_STOP] = UNIT_DEACTIVATING,
77 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
78 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
79 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
80 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
81 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
82 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
83 [SERVICE_FAILED] = UNIT_FAILED,
84 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
85 };
86
87 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
88 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
89 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
90
91 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
92 static void service_enter_reload_by_notify(Service *s);
93
94 static void service_init(Unit *u) {
95 Service *s = SERVICE(u);
96
97 assert(u);
98 assert(u->load_state == UNIT_STUB);
99
100 s->timeout_start_usec = u->manager->default_timeout_start_usec;
101 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
102 s->restart_usec = u->manager->default_restart_usec;
103 s->runtime_max_usec = USEC_INFINITY;
104 s->type = _SERVICE_TYPE_INVALID;
105 s->socket_fd = -1;
106 s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
107 s->guess_main_pid = true;
108
109 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
110
111 s->exec_context.keyring_mode = MANAGER_IS_SYSTEM(u->manager) ?
112 EXEC_KEYRING_PRIVATE : EXEC_KEYRING_INHERIT;
113 }
114
115 static void service_unwatch_control_pid(Service *s) {
116 assert(s);
117
118 if (s->control_pid <= 0)
119 return;
120
121 unit_unwatch_pid(UNIT(s), s->control_pid);
122 s->control_pid = 0;
123 }
124
125 static void service_unwatch_main_pid(Service *s) {
126 assert(s);
127
128 if (s->main_pid <= 0)
129 return;
130
131 unit_unwatch_pid(UNIT(s), s->main_pid);
132 s->main_pid = 0;
133 }
134
135 static void service_unwatch_pid_file(Service *s) {
136 if (!s->pid_file_pathspec)
137 return;
138
139 log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path);
140 path_spec_unwatch(s->pid_file_pathspec);
141 path_spec_done(s->pid_file_pathspec);
142 s->pid_file_pathspec = mfree(s->pid_file_pathspec);
143 }
144
145 static int service_set_main_pid(Service *s, pid_t pid) {
146 pid_t ppid;
147
148 assert(s);
149
150 if (pid <= 1)
151 return -EINVAL;
152
153 if (pid == getpid_cached())
154 return -EINVAL;
155
156 if (s->main_pid == pid && s->main_pid_known)
157 return 0;
158
159 if (s->main_pid != pid) {
160 service_unwatch_main_pid(s);
161 exec_status_start(&s->main_exec_status, pid);
162 }
163
164 s->main_pid = pid;
165 s->main_pid_known = true;
166
167 if (get_process_ppid(pid, &ppid) >= 0 && ppid != getpid_cached()) {
168 log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid);
169 s->main_pid_alien = true;
170 } else
171 s->main_pid_alien = false;
172
173 return 0;
174 }
175
176 void service_close_socket_fd(Service *s) {
177 assert(s);
178
179 /* Undo the effect of service_set_socket_fd(). */
180
181 s->socket_fd = asynchronous_close(s->socket_fd);
182
183 if (UNIT_ISSET(s->accept_socket)) {
184 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
185 unit_ref_unset(&s->accept_socket);
186 }
187 }
188
189 static void service_stop_watchdog(Service *s) {
190 assert(s);
191
192 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
193 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
194 }
195
196 static usec_t service_get_watchdog_usec(Service *s) {
197 assert(s);
198
199 if (s->watchdog_override_enable)
200 return s->watchdog_override_usec;
201 else
202 return s->watchdog_usec;
203 }
204
205 static void service_start_watchdog(Service *s) {
206 int r;
207 usec_t watchdog_usec;
208
209 assert(s);
210
211 watchdog_usec = service_get_watchdog_usec(s);
212 if (IN_SET(watchdog_usec, 0, USEC_INFINITY))
213 return;
214
215 if (s->watchdog_event_source) {
216 r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, watchdog_usec));
217 if (r < 0) {
218 log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m");
219 return;
220 }
221
222 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
223 } else {
224 r = sd_event_add_time(
225 UNIT(s)->manager->event,
226 &s->watchdog_event_source,
227 CLOCK_MONOTONIC,
228 usec_add(s->watchdog_timestamp.monotonic, watchdog_usec), 0,
229 service_dispatch_watchdog, s);
230 if (r < 0) {
231 log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m");
232 return;
233 }
234
235 (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog");
236
237 /* Let's process everything else which might be a sign
238 * of living before we consider a service died. */
239 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
240 }
241
242 if (r < 0)
243 log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m");
244 }
245
246 static void service_extend_timeout(Service *s, usec_t extend_timeout_usec) {
247 assert(s);
248
249 if (s->timer_event_source) {
250 uint64_t current = 0, extended = 0;
251 int r;
252
253 if (IN_SET(extend_timeout_usec, 0, USEC_INFINITY))
254 return;
255
256 extended = usec_add(now(CLOCK_MONOTONIC), extend_timeout_usec);
257
258 r = sd_event_source_get_time(s->timer_event_source, &current);
259 if (r < 0)
260 log_unit_error_errno(UNIT(s), r, "Failed to retrieve timeout timer: %m");
261 else if (extended > current) {
262 r = sd_event_source_set_time(s->timer_event_source, extended);
263 if (r < 0)
264 log_unit_warning_errno(UNIT(s), r, "Failed to set timeout timer: %m");
265 }
266
267 if (s->watchdog_event_source) {
268 /* extend watchdog if necessary. We've asked for an extended timeout so we
269 * shouldn't expect a watchdog timeout in the interval in between */
270 r = sd_event_source_get_time(s->watchdog_event_source, &current);
271 if (r < 0) {
272 log_unit_error_errno(UNIT(s), r, "Failed to retrieve watchdog timer: %m");
273 return;
274 }
275
276 if (extended > current) {
277 r = sd_event_source_set_time(s->watchdog_event_source, extended);
278 if (r < 0)
279 log_unit_warning_errno(UNIT(s), r, "Failed to set watchdog timer: %m");
280 }
281 }
282 }
283 }
284
285 static void service_reset_watchdog(Service *s) {
286 assert(s);
287
288 dual_timestamp_get(&s->watchdog_timestamp);
289 service_start_watchdog(s);
290 }
291
292 static void service_reset_watchdog_timeout(Service *s, usec_t watchdog_override_usec) {
293 assert(s);
294
295 s->watchdog_override_enable = true;
296 s->watchdog_override_usec = watchdog_override_usec;
297 service_reset_watchdog(s);
298
299 log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec);
300 log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec);
301 }
302
303 static void service_fd_store_unlink(ServiceFDStore *fs) {
304
305 if (!fs)
306 return;
307
308 if (fs->service) {
309 assert(fs->service->n_fd_store > 0);
310 LIST_REMOVE(fd_store, fs->service->fd_store, fs);
311 fs->service->n_fd_store--;
312 }
313
314 if (fs->event_source) {
315 sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
316 sd_event_source_unref(fs->event_source);
317 }
318
319 free(fs->fdname);
320 safe_close(fs->fd);
321 free(fs);
322 }
323
324 static void service_release_fd_store(Service *s) {
325 assert(s);
326
327 if (s->n_keep_fd_store > 0)
328 return;
329
330 log_unit_debug(UNIT(s), "Releasing all stored fds");
331 while (s->fd_store)
332 service_fd_store_unlink(s->fd_store);
333
334 assert(s->n_fd_store == 0);
335 }
336
337 static void service_release_resources(Unit *u) {
338 Service *s = SERVICE(u);
339
340 assert(s);
341
342 if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0)
343 return;
344
345 log_unit_debug(u, "Releasing resources.");
346
347 s->stdin_fd = safe_close(s->stdin_fd);
348 s->stdout_fd = safe_close(s->stdout_fd);
349 s->stderr_fd = safe_close(s->stderr_fd);
350
351 service_release_fd_store(s);
352 }
353
354 static void service_done(Unit *u) {
355 Service *s = SERVICE(u);
356
357 assert(s);
358
359 s->pid_file = mfree(s->pid_file);
360 s->status_text = mfree(s->status_text);
361
362 s->exec_runtime = exec_runtime_unref(s->exec_runtime, false);
363 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
364 s->control_command = NULL;
365 s->main_command = NULL;
366
367 dynamic_creds_unref(&s->dynamic_creds);
368
369 exit_status_set_free(&s->restart_prevent_status);
370 exit_status_set_free(&s->restart_force_status);
371 exit_status_set_free(&s->success_status);
372
373 /* This will leak a process, but at least no memory or any of
374 * our resources */
375 service_unwatch_main_pid(s);
376 service_unwatch_control_pid(s);
377 service_unwatch_pid_file(s);
378
379 if (s->bus_name) {
380 unit_unwatch_bus_name(u, s->bus_name);
381 s->bus_name = mfree(s->bus_name);
382 }
383
384 s->bus_name_owner = mfree(s->bus_name_owner);
385
386 s->usb_function_descriptors = mfree(s->usb_function_descriptors);
387 s->usb_function_strings = mfree(s->usb_function_strings);
388
389 service_close_socket_fd(s);
390 s->peer = socket_peer_unref(s->peer);
391
392 unit_ref_unset(&s->accept_socket);
393
394 service_stop_watchdog(s);
395
396 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
397
398 service_release_resources(u);
399 }
400
401 static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
402 ServiceFDStore *fs = userdata;
403
404 assert(e);
405 assert(fs);
406
407 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
408 log_unit_debug(UNIT(fs->service),
409 "Received %s on stored fd %d (%s), closing.",
410 revents & EPOLLERR ? "EPOLLERR" : "EPOLLHUP",
411 fs->fd, strna(fs->fdname));
412 service_fd_store_unlink(fs);
413 return 0;
414 }
415
416 static int service_add_fd_store(Service *s, int fd, const char *name) {
417 ServiceFDStore *fs;
418 int r;
419
420 /* fd is always consumed if we return >= 0 */
421
422 assert(s);
423 assert(fd >= 0);
424
425 if (s->n_fd_store >= s->n_fd_store_max)
426 return -EXFULL; /* Our store is full.
427 * Use this errno rather than E[NM]FILE to distinguish from
428 * the case where systemd itself hits the file limit. */
429
430 LIST_FOREACH(fd_store, fs, s->fd_store) {
431 r = same_fd(fs->fd, fd);
432 if (r < 0)
433 return r;
434 if (r > 0) {
435 safe_close(fd);
436 return 0; /* fd already included */
437 }
438 }
439
440 fs = new0(ServiceFDStore, 1);
441 if (!fs)
442 return -ENOMEM;
443
444 fs->fd = fd;
445 fs->service = s;
446 fs->fdname = strdup(name ?: "stored");
447 if (!fs->fdname) {
448 free(fs);
449 return -ENOMEM;
450 }
451
452 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
453 if (r < 0 && r != -EPERM) { /* EPERM indicates fds that aren't pollable, which is OK */
454 free(fs->fdname);
455 free(fs);
456 return r;
457 } else if (r >= 0)
458 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
459
460 LIST_PREPEND(fd_store, s->fd_store, fs);
461 s->n_fd_store++;
462
463 return 1; /* fd newly stored */
464 }
465
466 static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
467 int r;
468
469 assert(s);
470
471 while (fdset_size(fds) > 0) {
472 _cleanup_close_ int fd = -1;
473
474 fd = fdset_steal_first(fds);
475 if (fd < 0)
476 break;
477
478 r = service_add_fd_store(s, fd, name);
479 if (r == -EXFULL)
480 return log_unit_warning_errno(UNIT(s), r,
481 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
482 s->n_fd_store_max);
483 if (r < 0)
484 return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m");
485 if (r > 0)
486 log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name));
487 fd = -1;
488 }
489
490 return 0;
491 }
492
493 static void service_remove_fd_store(Service *s, const char *name) {
494 ServiceFDStore *fs, *n;
495
496 assert(s);
497 assert(name);
498
499 LIST_FOREACH_SAFE(fd_store, fs, n, s->fd_store) {
500 if (!streq(fs->fdname, name))
501 continue;
502
503 log_unit_debug(UNIT(s), "Got explicit request to remove fd %i (%s), closing.", fs->fd, name);
504 service_fd_store_unlink(fs);
505 }
506 }
507
508 static int service_arm_timer(Service *s, usec_t usec) {
509 int r;
510
511 assert(s);
512
513 if (s->timer_event_source) {
514 r = sd_event_source_set_time(s->timer_event_source, usec);
515 if (r < 0)
516 return r;
517
518 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
519 }
520
521 if (usec == USEC_INFINITY)
522 return 0;
523
524 r = sd_event_add_time(
525 UNIT(s)->manager->event,
526 &s->timer_event_source,
527 CLOCK_MONOTONIC,
528 usec, 0,
529 service_dispatch_timer, s);
530 if (r < 0)
531 return r;
532
533 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
534
535 return 0;
536 }
537
538 static int service_verify(Service *s) {
539 assert(s);
540
541 if (UNIT(s)->load_state != UNIT_LOADED)
542 return 0;
543
544 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
545 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
546 return -EINVAL;
547 }
548
549 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
550 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
551 return -EINVAL;
552 }
553
554 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
555 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
556 return -EINVAL;
557 }
558
559 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
560 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
561 return -EINVAL;
562 }
563
564 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
565 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
566 return -EINVAL;
567 }
568
569 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
570 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
571 return -EINVAL;
572 }
573
574 if (s->type == SERVICE_DBUS && !s->bus_name) {
575 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
576 return -EINVAL;
577 }
578
579 if (s->bus_name && s->type != SERVICE_DBUS)
580 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
581
582 if (s->exec_context.pam_name && !IN_SET(s->kill_context.kill_mode, KILL_CONTROL_GROUP, KILL_MIXED)) {
583 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
584 return -EINVAL;
585 }
586
587 if (s->usb_function_descriptors && !s->usb_function_strings)
588 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
589
590 if (!s->usb_function_descriptors && s->usb_function_strings)
591 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
592
593 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
594 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
595
596 return 0;
597 }
598
599 static int service_add_default_dependencies(Service *s) {
600 int r;
601
602 assert(s);
603
604 if (!UNIT(s)->default_dependencies)
605 return 0;
606
607 /* Add a number of automatic dependencies useful for the
608 * majority of services. */
609
610 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
611 /* First, pull in the really early boot stuff, and
612 * require it, so that we fail if we can't acquire
613 * it. */
614
615 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT);
616 if (r < 0)
617 return r;
618 } else {
619
620 /* In the --user instance there's no sysinit.target,
621 * in that case require basic.target instead. */
622
623 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT);
624 if (r < 0)
625 return r;
626 }
627
628 /* Second, if the rest of the base system is in the same
629 * transaction, order us after it, but do not pull it in or
630 * even require it. */
631 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT);
632 if (r < 0)
633 return r;
634
635 /* Third, add us in for normal shutdown. */
636 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true, UNIT_DEPENDENCY_DEFAULT);
637 }
638
639 static void service_fix_output(Service *s) {
640 assert(s);
641
642 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
643 * however, since in that case we want output to default to the same place as we read input from. */
644
645 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
646 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
647 s->exec_context.std_input == EXEC_INPUT_NULL)
648 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
649
650 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
651 s->exec_context.std_input == EXEC_INPUT_NULL)
652 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
653
654 if (s->exec_context.std_input == EXEC_INPUT_NULL &&
655 s->exec_context.stdin_data_size > 0)
656 s->exec_context.std_input = EXEC_INPUT_DATA;
657 }
658
659 static int service_setup_bus_name(Service *s) {
660 int r;
661
662 assert(s);
663
664 if (!s->bus_name)
665 return 0;
666
667 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true, UNIT_DEPENDENCY_FILE);
668 if (r < 0)
669 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
670
671 /* We always want to be ordered against dbus.socket if both are in the transaction. */
672 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true, UNIT_DEPENDENCY_FILE);
673 if (r < 0)
674 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
675
676 r = unit_watch_bus_name(UNIT(s), s->bus_name);
677 if (r == -EEXIST)
678 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
679 if (r < 0)
680 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
681
682 return 0;
683 }
684
685 static int service_add_extras(Service *s) {
686 int r;
687
688 assert(s);
689
690 if (s->type == _SERVICE_TYPE_INVALID) {
691 /* Figure out a type automatically */
692 if (s->bus_name)
693 s->type = SERVICE_DBUS;
694 else if (s->exec_command[SERVICE_EXEC_START])
695 s->type = SERVICE_SIMPLE;
696 else
697 s->type = SERVICE_ONESHOT;
698 }
699
700 /* Oneshot services have disabled start timeout by default */
701 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
702 s->timeout_start_usec = USEC_INFINITY;
703
704 service_fix_output(s);
705
706 r = unit_patch_contexts(UNIT(s));
707 if (r < 0)
708 return r;
709
710 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
711 if (r < 0)
712 return r;
713
714 r = unit_set_default_slice(UNIT(s));
715 if (r < 0)
716 return r;
717
718 /* If the service needs the notify socket, let's enable it automatically. */
719 if (s->notify_access == NOTIFY_NONE &&
720 (s->type == SERVICE_NOTIFY || s->watchdog_usec > 0 || s->n_fd_store_max > 0))
721 s->notify_access = NOTIFY_MAIN;
722
723 r = service_add_default_dependencies(s);
724 if (r < 0)
725 return r;
726
727 r = service_setup_bus_name(s);
728 if (r < 0)
729 return r;
730
731 return 0;
732 }
733
734 static int service_load(Unit *u) {
735 Service *s = SERVICE(u);
736 int r;
737
738 assert(s);
739
740 /* Load a .service file */
741 r = unit_load_fragment(u);
742 if (r < 0)
743 return r;
744
745 /* Still nothing found? Then let's give up */
746 if (u->load_state == UNIT_STUB)
747 return -ENOENT;
748
749 /* This is a new unit? Then let's add in some extras */
750 if (u->load_state == UNIT_LOADED) {
751
752 /* We were able to load something, then let's add in
753 * the dropin directories. */
754 r = unit_load_dropin(u);
755 if (r < 0)
756 return r;
757
758 /* This is a new unit? Then let's add in some
759 * extras */
760 r = service_add_extras(s);
761 if (r < 0)
762 return r;
763 }
764
765 return service_verify(s);
766 }
767
768 static void service_dump(Unit *u, FILE *f, const char *prefix) {
769 char buf_restart[FORMAT_TIMESPAN_MAX], buf_start[FORMAT_TIMESPAN_MAX], buf_stop[FORMAT_TIMESPAN_MAX];
770 char buf_runtime[FORMAT_TIMESPAN_MAX], buf_watchdog[FORMAT_TIMESPAN_MAX];
771 ServiceExecCommand c;
772 Service *s = SERVICE(u);
773 const char *prefix2;
774
775 assert(s);
776
777 prefix = strempty(prefix);
778 prefix2 = strjoina(prefix, "\t");
779
780 fprintf(f,
781 "%sService State: %s\n"
782 "%sResult: %s\n"
783 "%sReload Result: %s\n"
784 "%sPermissionsStartOnly: %s\n"
785 "%sRootDirectoryStartOnly: %s\n"
786 "%sRemainAfterExit: %s\n"
787 "%sGuessMainPID: %s\n"
788 "%sType: %s\n"
789 "%sRestart: %s\n"
790 "%sNotifyAccess: %s\n"
791 "%sNotifyState: %s\n",
792 prefix, service_state_to_string(s->state),
793 prefix, service_result_to_string(s->result),
794 prefix, service_result_to_string(s->reload_result),
795 prefix, yes_no(s->permissions_start_only),
796 prefix, yes_no(s->root_directory_start_only),
797 prefix, yes_no(s->remain_after_exit),
798 prefix, yes_no(s->guess_main_pid),
799 prefix, service_type_to_string(s->type),
800 prefix, service_restart_to_string(s->restart),
801 prefix, notify_access_to_string(s->notify_access),
802 prefix, notify_state_to_string(s->notify_state));
803
804 if (s->control_pid > 0)
805 fprintf(f,
806 "%sControl PID: "PID_FMT"\n",
807 prefix, s->control_pid);
808
809 if (s->main_pid > 0)
810 fprintf(f,
811 "%sMain PID: "PID_FMT"\n"
812 "%sMain PID Known: %s\n"
813 "%sMain PID Alien: %s\n",
814 prefix, s->main_pid,
815 prefix, yes_no(s->main_pid_known),
816 prefix, yes_no(s->main_pid_alien));
817
818 if (s->pid_file)
819 fprintf(f,
820 "%sPIDFile: %s\n",
821 prefix, s->pid_file);
822
823 if (s->bus_name)
824 fprintf(f,
825 "%sBusName: %s\n"
826 "%sBus Name Good: %s\n",
827 prefix, s->bus_name,
828 prefix, yes_no(s->bus_name_good));
829
830 if (UNIT_ISSET(s->accept_socket))
831 fprintf(f,
832 "%sAccept Socket: %s\n",
833 prefix, UNIT_DEREF(s->accept_socket)->id);
834
835 fprintf(f,
836 "%sRestartSec: %s\n"
837 "%sTimeoutStartSec: %s\n"
838 "%sTimeoutStopSec: %s\n"
839 "%sRuntimeMaxSec: %s\n"
840 "%sWatchdogSec: %s\n",
841 prefix, format_timespan(buf_restart, sizeof(buf_restart), s->restart_usec, USEC_PER_SEC),
842 prefix, format_timespan(buf_start, sizeof(buf_start), s->timeout_start_usec, USEC_PER_SEC),
843 prefix, format_timespan(buf_stop, sizeof(buf_stop), s->timeout_stop_usec, USEC_PER_SEC),
844 prefix, format_timespan(buf_runtime, sizeof(buf_runtime), s->runtime_max_usec, USEC_PER_SEC),
845 prefix, format_timespan(buf_watchdog, sizeof(buf_watchdog), s->watchdog_usec, USEC_PER_SEC));
846
847 kill_context_dump(&s->kill_context, f, prefix);
848 exec_context_dump(&s->exec_context, f, prefix);
849
850 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
851
852 if (!s->exec_command[c])
853 continue;
854
855 fprintf(f, "%s-> %s:\n",
856 prefix, service_exec_command_to_string(c));
857
858 exec_command_dump_list(s->exec_command[c], f, prefix2);
859 }
860
861 if (s->status_text)
862 fprintf(f, "%sStatus Text: %s\n",
863 prefix, s->status_text);
864
865 if (s->n_fd_store_max > 0)
866 fprintf(f,
867 "%sFile Descriptor Store Max: %u\n"
868 "%sFile Descriptor Store Current: %zu\n",
869 prefix, s->n_fd_store_max,
870 prefix, s->n_fd_store);
871
872 cgroup_context_dump(&s->cgroup_context, f, prefix);
873 }
874
875 static int service_is_suitable_main_pid(Service *s, pid_t pid, int prio) {
876 Unit *owner;
877
878 assert(s);
879 assert(pid_is_valid(pid));
880
881 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
882 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
883 * good */
884
885 if (pid == getpid_cached() || pid == 1) {
886 log_unit_full(UNIT(s), prio, 0, "New main PID "PID_FMT" is the manager, refusing.", pid);
887 return -EPERM;
888 }
889
890 if (pid == s->control_pid) {
891 log_unit_full(UNIT(s), prio, 0, "New main PID "PID_FMT" is the control process, refusing.", pid);
892 return -EPERM;
893 }
894
895 if (!pid_is_alive(pid)) {
896 log_unit_full(UNIT(s), prio, 0, "New main PID "PID_FMT" does not exist or is a zombie.", pid);
897 return -ESRCH;
898 }
899
900 owner = manager_get_unit_by_pid(UNIT(s)->manager, pid);
901 if (owner == UNIT(s)) {
902 log_unit_debug(UNIT(s), "New main PID "PID_FMT" belongs to service, we are happy.", pid);
903 return 1; /* Yay, it's definitely a good PID */
904 }
905
906 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
907 }
908
909 static int service_load_pid_file(Service *s, bool may_warn) {
910 char procfs[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
911 bool questionable_pid_file = false;
912 _cleanup_free_ char *k = NULL;
913 _cleanup_close_ int fd = -1;
914 int r, prio;
915 pid_t pid;
916
917 assert(s);
918
919 if (!s->pid_file)
920 return -ENOENT;
921
922 prio = may_warn ? LOG_INFO : LOG_DEBUG;
923
924 fd = chase_symlinks(s->pid_file, NULL, CHASE_OPEN|CHASE_SAFE, NULL);
925 if (fd == -EPERM) {
926 log_unit_full(UNIT(s), LOG_DEBUG, fd, "Permission denied while opening PID file or potentially unsafe symlink chain, will now retry with relaxed checks: %s", s->pid_file);
927
928 questionable_pid_file = true;
929
930 fd = chase_symlinks(s->pid_file, NULL, CHASE_OPEN, NULL);
931 }
932 if (fd < 0)
933 return log_unit_full(UNIT(s), prio, fd, "Can't open PID file %s (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state));
934
935 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd chase_symlinks() returned us into a proper fd first. */
936 xsprintf(procfs, "/proc/self/fd/%i", fd);
937 r = read_one_line_file(procfs, &k);
938 if (r < 0)
939 return log_unit_error_errno(UNIT(s), r, "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m", s->pid_file);
940
941 r = parse_pid(k, &pid);
942 if (r < 0)
943 return log_unit_full(UNIT(s), prio, r, "Failed to parse PID from file %s: %m", s->pid_file);
944
945 if (s->main_pid_known && pid == s->main_pid)
946 return 0;
947
948 r = service_is_suitable_main_pid(s, pid, prio);
949 if (r < 0)
950 return r;
951 if (r == 0) {
952 struct stat st;
953
954 if (questionable_pid_file) {
955 log_unit_error(UNIT(s), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s->pid_file);
956 return -EPERM;
957 }
958
959 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
960
961 if (fstat(fd, &st) < 0)
962 return log_unit_error_errno(UNIT(s), errno, "Failed to fstat() PID file O_PATH fd: %m");
963
964 if (st.st_uid != 0) {
965 log_unit_error(UNIT(s), "New main PID "PID_FMT" does not belong to service, and PID file is not owned by root. Refusing.", pid);
966 return -EPERM;
967 }
968
969 log_unit_debug(UNIT(s), "New main PID "PID_FMT" does not belong to service, but we'll accept it since PID file is owned by root.", pid);
970 }
971
972 if (s->main_pid_known) {
973 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
974
975 service_unwatch_main_pid(s);
976 s->main_pid_known = false;
977 } else
978 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
979
980 r = service_set_main_pid(s, pid);
981 if (r < 0)
982 return r;
983
984 r = unit_watch_pid(UNIT(s), pid);
985 if (r < 0) /* FIXME: we need to do something here */
986 return log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
987
988 return 1;
989 }
990
991 static void service_search_main_pid(Service *s) {
992 pid_t pid = 0;
993 int r;
994
995 assert(s);
996
997 /* If we know it anyway, don't ever fallback to unreliable
998 * heuristics */
999 if (s->main_pid_known)
1000 return;
1001
1002 if (!s->guess_main_pid)
1003 return;
1004
1005 assert(s->main_pid <= 0);
1006
1007 if (unit_search_main_pid(UNIT(s), &pid) < 0)
1008 return;
1009
1010 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
1011 if (service_set_main_pid(s, pid) < 0)
1012 return;
1013
1014 r = unit_watch_pid(UNIT(s), pid);
1015 if (r < 0)
1016 /* FIXME: we need to do something here */
1017 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
1018 }
1019
1020 static void service_set_state(Service *s, ServiceState state) {
1021 ServiceState old_state;
1022 const UnitActiveState *table;
1023
1024 assert(s);
1025
1026 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1027
1028 old_state = s->state;
1029 s->state = state;
1030
1031 service_unwatch_pid_file(s);
1032
1033 if (!IN_SET(state,
1034 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1035 SERVICE_RUNNING,
1036 SERVICE_RELOAD,
1037 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1038 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
1039 SERVICE_AUTO_RESTART))
1040 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1041
1042 if (!IN_SET(state,
1043 SERVICE_START, SERVICE_START_POST,
1044 SERVICE_RUNNING, SERVICE_RELOAD,
1045 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1046 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1047 service_unwatch_main_pid(s);
1048 s->main_command = NULL;
1049 }
1050
1051 if (!IN_SET(state,
1052 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1053 SERVICE_RELOAD,
1054 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1055 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1056 service_unwatch_control_pid(s);
1057 s->control_command = NULL;
1058 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1059 }
1060
1061 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1062 unit_unwatch_all_pids(UNIT(s));
1063
1064 if (!IN_SET(state,
1065 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1066 SERVICE_RUNNING, SERVICE_RELOAD,
1067 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1068 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
1069 !(state == SERVICE_DEAD && UNIT(s)->job))
1070 service_close_socket_fd(s);
1071
1072 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1073 service_stop_watchdog(s);
1074
1075 /* For the inactive states unit_notify() will trim the cgroup,
1076 * but for exit we have to do that ourselves... */
1077 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
1078 unit_prune_cgroup(UNIT(s));
1079
1080 if (old_state != state)
1081 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
1082
1083 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1084 }
1085
1086 static usec_t service_coldplug_timeout(Service *s) {
1087 assert(s);
1088
1089 switch (s->deserialized_state) {
1090
1091 case SERVICE_START_PRE:
1092 case SERVICE_START:
1093 case SERVICE_START_POST:
1094 case SERVICE_RELOAD:
1095 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
1096
1097 case SERVICE_RUNNING:
1098 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
1099
1100 case SERVICE_STOP:
1101 case SERVICE_STOP_SIGABRT:
1102 case SERVICE_STOP_SIGTERM:
1103 case SERVICE_STOP_SIGKILL:
1104 case SERVICE_STOP_POST:
1105 case SERVICE_FINAL_SIGTERM:
1106 case SERVICE_FINAL_SIGKILL:
1107 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
1108
1109 case SERVICE_AUTO_RESTART:
1110 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
1111
1112 default:
1113 return USEC_INFINITY;
1114 }
1115 }
1116
1117 static int service_coldplug(Unit *u) {
1118 Service *s = SERVICE(u);
1119 int r;
1120
1121 assert(s);
1122 assert(s->state == SERVICE_DEAD);
1123
1124 if (s->deserialized_state == s->state)
1125 return 0;
1126
1127 r = service_arm_timer(s, service_coldplug_timeout(s));
1128 if (r < 0)
1129 return r;
1130
1131 if (s->main_pid > 0 &&
1132 pid_is_unwaited(s->main_pid) &&
1133 (IN_SET(s->deserialized_state,
1134 SERVICE_START, SERVICE_START_POST,
1135 SERVICE_RUNNING, SERVICE_RELOAD,
1136 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1137 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1138 r = unit_watch_pid(UNIT(s), s->main_pid);
1139 if (r < 0)
1140 return r;
1141 }
1142
1143 if (s->control_pid > 0 &&
1144 pid_is_unwaited(s->control_pid) &&
1145 IN_SET(s->deserialized_state,
1146 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1147 SERVICE_RELOAD,
1148 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1149 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1150 r = unit_watch_pid(UNIT(s), s->control_pid);
1151 if (r < 0)
1152 return r;
1153 }
1154
1155 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1156 unit_watch_all_pids(UNIT(s));
1157
1158 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1159 service_start_watchdog(s);
1160
1161 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART)) {
1162 (void) unit_setup_dynamic_creds(u);
1163 (void) unit_setup_exec_runtime(u);
1164 }
1165
1166 if (UNIT_ISSET(s->accept_socket)) {
1167 Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket));
1168
1169 if (socket->max_connections_per_source > 0) {
1170 SocketPeer *peer;
1171
1172 /* Make a best-effort attempt at bumping the connection count */
1173 if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) {
1174 socket_peer_unref(s->peer);
1175 s->peer = peer;
1176 }
1177 }
1178 }
1179
1180 service_set_state(s, s->deserialized_state);
1181 return 0;
1182 }
1183
1184 static int service_collect_fds(Service *s,
1185 int **fds,
1186 char ***fd_names,
1187 unsigned *n_storage_fds,
1188 unsigned *n_socket_fds) {
1189
1190 _cleanup_strv_free_ char **rfd_names = NULL;
1191 _cleanup_free_ int *rfds = NULL;
1192 unsigned rn_socket_fds = 0, rn_storage_fds = 0;
1193 int r;
1194
1195 assert(s);
1196 assert(fds);
1197 assert(fd_names);
1198 assert(n_socket_fds);
1199
1200 if (s->socket_fd >= 0) {
1201
1202 /* Pass the per-connection socket */
1203
1204 rfds = new(int, 1);
1205 if (!rfds)
1206 return -ENOMEM;
1207 rfds[0] = s->socket_fd;
1208
1209 rfd_names = strv_new("connection", NULL);
1210 if (!rfd_names)
1211 return -ENOMEM;
1212
1213 rn_socket_fds = 1;
1214 } else {
1215 Iterator i;
1216 void *v;
1217 Unit *u;
1218
1219 /* Pass all our configured sockets for singleton services */
1220
1221 HASHMAP_FOREACH_KEY(v, u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1222 _cleanup_free_ int *cfds = NULL;
1223 Socket *sock;
1224 int cn_fds;
1225
1226 if (u->type != UNIT_SOCKET)
1227 continue;
1228
1229 sock = SOCKET(u);
1230
1231 cn_fds = socket_collect_fds(sock, &cfds);
1232 if (cn_fds < 0)
1233 return cn_fds;
1234
1235 if (cn_fds <= 0)
1236 continue;
1237
1238 if (!rfds) {
1239 rfds = TAKE_PTR(cfds);
1240 rn_socket_fds = cn_fds;
1241 } else {
1242 int *t;
1243
1244 t = reallocarray(rfds, rn_socket_fds + cn_fds, sizeof(int));
1245 if (!t)
1246 return -ENOMEM;
1247
1248 memcpy(t + rn_socket_fds, cfds, cn_fds * sizeof(int));
1249
1250 rfds = t;
1251 rn_socket_fds += cn_fds;
1252 }
1253
1254 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1255 if (r < 0)
1256 return r;
1257 }
1258 }
1259
1260 if (s->n_fd_store > 0) {
1261 ServiceFDStore *fs;
1262 unsigned n_fds;
1263 char **nl;
1264 int *t;
1265
1266 t = reallocarray(rfds, rn_socket_fds + s->n_fd_store, sizeof(int));
1267 if (!t)
1268 return -ENOMEM;
1269
1270 rfds = t;
1271
1272 nl = reallocarray(rfd_names, rn_socket_fds + s->n_fd_store + 1, sizeof(char *));
1273 if (!nl)
1274 return -ENOMEM;
1275
1276 rfd_names = nl;
1277 n_fds = rn_socket_fds;
1278
1279 LIST_FOREACH(fd_store, fs, s->fd_store) {
1280 rfds[n_fds] = fs->fd;
1281 rfd_names[n_fds] = strdup(strempty(fs->fdname));
1282 if (!rfd_names[n_fds])
1283 return -ENOMEM;
1284
1285 rn_storage_fds++;
1286 n_fds++;
1287 }
1288
1289 rfd_names[n_fds] = NULL;
1290 }
1291
1292 *fds = TAKE_PTR(rfds);
1293 *fd_names = TAKE_PTR(rfd_names);
1294 *n_socket_fds = rn_socket_fds;
1295 *n_storage_fds = rn_storage_fds;
1296
1297 return 0;
1298 }
1299
1300 static bool service_exec_needs_notify_socket(Service *s, ExecFlags flags) {
1301 assert(s);
1302
1303 /* Notifications are accepted depending on the process and
1304 * the access setting of the service:
1305 * process: \ access: NONE MAIN EXEC ALL
1306 * main no yes yes yes
1307 * control no no yes yes
1308 * other (forked) no no no yes */
1309
1310 if (flags & EXEC_IS_CONTROL)
1311 /* A control process */
1312 return IN_SET(s->notify_access, NOTIFY_EXEC, NOTIFY_ALL);
1313
1314 /* We only spawn main processes and control processes, so any
1315 * process that is not a control process is a main process */
1316 return s->notify_access != NOTIFY_NONE;
1317 }
1318
1319 static int service_spawn(
1320 Service *s,
1321 ExecCommand *c,
1322 usec_t timeout,
1323 ExecFlags flags,
1324 pid_t *_pid) {
1325
1326 ExecParameters exec_params = {
1327 .flags = flags,
1328 .stdin_fd = -1,
1329 .stdout_fd = -1,
1330 .stderr_fd = -1,
1331 };
1332 _cleanup_strv_free_ char **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1333 unsigned n_storage_fds = 0, n_socket_fds = 0, n_env = 0;
1334 _cleanup_free_ int *fds = NULL;
1335 pid_t pid;
1336 int r;
1337
1338 assert(s);
1339 assert(c);
1340 assert(_pid);
1341
1342 r = unit_prepare_exec(UNIT(s));
1343 if (r < 0)
1344 return r;
1345
1346 if (flags & EXEC_IS_CONTROL) {
1347 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1348 if (s->permissions_start_only)
1349 exec_params.flags &= ~EXEC_APPLY_SANDBOXING;
1350 if (s->root_directory_start_only)
1351 exec_params.flags &= ~EXEC_APPLY_CHROOT;
1352 }
1353
1354 if ((flags & EXEC_PASS_FDS) ||
1355 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1356 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1357 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1358
1359 r = service_collect_fds(s, &fds, &fd_names, &n_storage_fds, &n_socket_fds);
1360 if (r < 0)
1361 return r;
1362
1363 log_unit_debug(UNIT(s), "Passing %i fds to service", n_storage_fds + n_socket_fds);
1364 }
1365
1366 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1367 if (r < 0)
1368 return r;
1369
1370 our_env = new0(char*, 9);
1371 if (!our_env)
1372 return -ENOMEM;
1373
1374 if (service_exec_needs_notify_socket(s, flags))
1375 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1376 return -ENOMEM;
1377
1378 if (s->main_pid > 0)
1379 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1380 return -ENOMEM;
1381
1382 if (MANAGER_IS_USER(UNIT(s)->manager))
1383 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid_cached()) < 0)
1384 return -ENOMEM;
1385
1386 if (s->socket_fd >= 0) {
1387 union sockaddr_union sa;
1388 socklen_t salen = sizeof(sa);
1389
1390 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1391 * useful. Note that we do this only when we are still connected at this point in time, which we might
1392 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1393 * in ENOTCONN), and just use whate we can use. */
1394
1395 if (getpeername(s->socket_fd, &sa.sa, &salen) >= 0 &&
1396 IN_SET(sa.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) {
1397
1398 _cleanup_free_ char *addr = NULL;
1399 char *t;
1400 unsigned port;
1401
1402 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1403 if (r < 0)
1404 return r;
1405
1406 t = strappend("REMOTE_ADDR=", addr);
1407 if (!t)
1408 return -ENOMEM;
1409 our_env[n_env++] = t;
1410
1411 r = sockaddr_port(&sa.sa, &port);
1412 if (r < 0)
1413 return r;
1414
1415 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1416 return -ENOMEM;
1417 our_env[n_env++] = t;
1418 }
1419 }
1420
1421 if (flags & EXEC_SETENV_RESULT) {
1422 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1423 return -ENOMEM;
1424
1425 if (s->main_exec_status.pid > 0 &&
1426 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1427 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1428 return -ENOMEM;
1429
1430 if (s->main_exec_status.code == CLD_EXITED)
1431 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1432 else
1433 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1434 if (r < 0)
1435 return -ENOMEM;
1436 }
1437 }
1438
1439 unit_set_exec_params(UNIT(s), &exec_params);
1440
1441 final_env = strv_env_merge(2, exec_params.environment, our_env, NULL);
1442 if (!final_env)
1443 return -ENOMEM;
1444
1445 /* System services should get a new keyring by default. */
1446 SET_FLAG(exec_params.flags, EXEC_NEW_KEYRING, MANAGER_IS_SYSTEM(UNIT(s)->manager));
1447
1448 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1449 SET_FLAG(exec_params.flags, EXEC_NSS_BYPASS_BUS,
1450 MANAGER_IS_SYSTEM(UNIT(s)->manager) && unit_has_name(UNIT(s), SPECIAL_DBUS_SERVICE));
1451
1452 exec_params.argv = c->argv;
1453 exec_params.environment = final_env;
1454 exec_params.fds = fds;
1455 exec_params.fd_names = fd_names;
1456 exec_params.n_storage_fds = n_storage_fds;
1457 exec_params.n_socket_fds = n_socket_fds;
1458 exec_params.watchdog_usec = s->watchdog_usec;
1459 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1460 if (s->type == SERVICE_IDLE)
1461 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1462 exec_params.stdin_fd = s->stdin_fd;
1463 exec_params.stdout_fd = s->stdout_fd;
1464 exec_params.stderr_fd = s->stderr_fd;
1465
1466 r = exec_spawn(UNIT(s),
1467 c,
1468 &s->exec_context,
1469 &exec_params,
1470 s->exec_runtime,
1471 &s->dynamic_creds,
1472 &pid);
1473 if (r < 0)
1474 return r;
1475
1476 r = unit_watch_pid(UNIT(s), pid);
1477 if (r < 0) /* FIXME: we need to do something here */
1478 return r;
1479
1480 *_pid = pid;
1481
1482 return 0;
1483 }
1484
1485 static int main_pid_good(Service *s) {
1486 assert(s);
1487
1488 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1489
1490 /* If we know the pid file, then let's just check if it is
1491 * still valid */
1492 if (s->main_pid_known) {
1493
1494 /* If it's an alien child let's check if it is still
1495 * alive ... */
1496 if (s->main_pid_alien && s->main_pid > 0)
1497 return pid_is_alive(s->main_pid);
1498
1499 /* .. otherwise assume we'll get a SIGCHLD for it,
1500 * which we really should wait for to collect exit
1501 * status and code */
1502 return s->main_pid > 0;
1503 }
1504
1505 /* We don't know the pid */
1506 return -EAGAIN;
1507 }
1508
1509 static int control_pid_good(Service *s) {
1510 assert(s);
1511
1512 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1513 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1514 * means: we can't figure it out. */
1515
1516 return s->control_pid > 0;
1517 }
1518
1519 static int cgroup_good(Service *s) {
1520 int r;
1521
1522 assert(s);
1523
1524 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1525 * figure it out */
1526
1527 if (!UNIT(s)->cgroup_path)
1528 return 0;
1529
1530 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1531 if (r < 0)
1532 return r;
1533
1534 return r == 0;
1535 }
1536
1537 static bool service_shall_restart(Service *s) {
1538 assert(s);
1539
1540 /* Don't restart after manual stops */
1541 if (s->forbid_restart)
1542 return false;
1543
1544 /* Never restart if this is configured as special exception */
1545 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1546 return false;
1547
1548 /* Restart if the exit code/status are configured as restart triggers */
1549 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1550 return true;
1551
1552 switch (s->restart) {
1553
1554 case SERVICE_RESTART_NO:
1555 return false;
1556
1557 case SERVICE_RESTART_ALWAYS:
1558 return true;
1559
1560 case SERVICE_RESTART_ON_SUCCESS:
1561 return s->result == SERVICE_SUCCESS;
1562
1563 case SERVICE_RESTART_ON_FAILURE:
1564 return s->result != SERVICE_SUCCESS;
1565
1566 case SERVICE_RESTART_ON_ABNORMAL:
1567 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1568
1569 case SERVICE_RESTART_ON_WATCHDOG:
1570 return s->result == SERVICE_FAILURE_WATCHDOG;
1571
1572 case SERVICE_RESTART_ON_ABORT:
1573 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1574
1575 default:
1576 assert_not_reached("unknown restart setting");
1577 }
1578 }
1579
1580 static bool service_will_restart(Unit *u) {
1581 Service *s = SERVICE(u);
1582
1583 assert(s);
1584
1585 if (s->will_auto_restart)
1586 return true;
1587 if (s->state == SERVICE_AUTO_RESTART)
1588 return true;
1589 if (!UNIT(s)->job)
1590 return false;
1591 if (UNIT(s)->job->type == JOB_START)
1592 return true;
1593 return false;
1594 }
1595
1596 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1597 int r;
1598
1599 assert(s);
1600
1601 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1602 * undo what has already been enqueued. */
1603 if (unit_stop_pending(UNIT(s)))
1604 allow_restart = false;
1605
1606 if (s->result == SERVICE_SUCCESS)
1607 s->result = f;
1608
1609 if (s->result != SERVICE_SUCCESS)
1610 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1611
1612 if (allow_restart && service_shall_restart(s))
1613 s->will_auto_restart = true;
1614
1615 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1616 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1617 s->n_keep_fd_store ++;
1618
1619 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1620
1621 if (s->will_auto_restart) {
1622 s->will_auto_restart = false;
1623
1624 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1625 if (r < 0) {
1626 s->n_keep_fd_store--;
1627 goto fail;
1628 }
1629
1630 service_set_state(s, SERVICE_AUTO_RESTART);
1631 } else
1632 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1633 * user can still introspect the counter. Do so on the next start. */
1634 s->flush_n_restarts = true;
1635
1636 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1637 * queue, so that the fd store is possibly gc'ed again */
1638 s->n_keep_fd_store--;
1639 unit_add_to_gc_queue(UNIT(s));
1640
1641 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1642 s->forbid_restart = false;
1643
1644 /* We want fresh tmpdirs in case service is started again immediately */
1645 s->exec_runtime = exec_runtime_unref(s->exec_runtime, true);
1646
1647 if (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_NO ||
1648 (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !service_will_restart(UNIT(s))))
1649 /* Also, remove the runtime directory */
1650 exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
1651
1652 /* Get rid of the IPC bits of the user */
1653 unit_unref_uid_gid(UNIT(s), true);
1654
1655 /* Release the user, and destroy it if we are the only remaining owner */
1656 dynamic_creds_destroy(&s->dynamic_creds);
1657
1658 /* Try to delete the pid file. At this point it will be
1659 * out-of-date, and some software might be confused by it, so
1660 * let's remove it. */
1661 if (s->pid_file)
1662 (void) unlink(s->pid_file);
1663
1664 return;
1665
1666 fail:
1667 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1668 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1669 }
1670
1671 static void service_enter_stop_post(Service *s, ServiceResult f) {
1672 int r;
1673 assert(s);
1674
1675 if (s->result == SERVICE_SUCCESS)
1676 s->result = f;
1677
1678 service_unwatch_control_pid(s);
1679 unit_watch_all_pids(UNIT(s));
1680
1681 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1682 if (s->control_command) {
1683 s->control_command_id = SERVICE_EXEC_STOP_POST;
1684
1685 r = service_spawn(s,
1686 s->control_command,
1687 s->timeout_stop_usec,
1688 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1689 &s->control_pid);
1690 if (r < 0)
1691 goto fail;
1692
1693 service_set_state(s, SERVICE_STOP_POST);
1694 } else
1695 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1696
1697 return;
1698
1699 fail:
1700 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1701 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1702 }
1703
1704 static int state_to_kill_operation(ServiceState state) {
1705 switch (state) {
1706
1707 case SERVICE_STOP_SIGABRT:
1708 return KILL_ABORT;
1709
1710 case SERVICE_STOP_SIGTERM:
1711 case SERVICE_FINAL_SIGTERM:
1712 return KILL_TERMINATE;
1713
1714 case SERVICE_STOP_SIGKILL:
1715 case SERVICE_FINAL_SIGKILL:
1716 return KILL_KILL;
1717
1718 default:
1719 return _KILL_OPERATION_INVALID;
1720 }
1721 }
1722
1723 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1724 int r;
1725
1726 assert(s);
1727
1728 if (s->result == SERVICE_SUCCESS)
1729 s->result = f;
1730
1731 unit_watch_all_pids(UNIT(s));
1732
1733 r = unit_kill_context(
1734 UNIT(s),
1735 &s->kill_context,
1736 state_to_kill_operation(state),
1737 s->main_pid,
1738 s->control_pid,
1739 s->main_pid_alien);
1740 if (r < 0)
1741 goto fail;
1742
1743 if (r > 0) {
1744 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1745 if (r < 0)
1746 goto fail;
1747
1748 service_set_state(s, state);
1749 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1750 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1751 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1752 service_enter_stop_post(s, SERVICE_SUCCESS);
1753 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1754 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1755 else
1756 service_enter_dead(s, SERVICE_SUCCESS, true);
1757
1758 return;
1759
1760 fail:
1761 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1762
1763 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1764 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1765 else
1766 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1767 }
1768
1769 static void service_enter_stop_by_notify(Service *s) {
1770 assert(s);
1771
1772 unit_watch_all_pids(UNIT(s));
1773
1774 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1775
1776 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1777 service_set_state(s, SERVICE_STOP_SIGTERM);
1778 }
1779
1780 static void service_enter_stop(Service *s, ServiceResult f) {
1781 int r;
1782
1783 assert(s);
1784
1785 if (s->result == SERVICE_SUCCESS)
1786 s->result = f;
1787
1788 service_unwatch_control_pid(s);
1789 unit_watch_all_pids(UNIT(s));
1790
1791 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1792 if (s->control_command) {
1793 s->control_command_id = SERVICE_EXEC_STOP;
1794
1795 r = service_spawn(s,
1796 s->control_command,
1797 s->timeout_stop_usec,
1798 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1799 &s->control_pid);
1800 if (r < 0)
1801 goto fail;
1802
1803 service_set_state(s, SERVICE_STOP);
1804 } else
1805 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1806
1807 return;
1808
1809 fail:
1810 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1811 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1812 }
1813
1814 static bool service_good(Service *s) {
1815 int main_pid_ok;
1816 assert(s);
1817
1818 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1819 return false;
1820
1821 main_pid_ok = main_pid_good(s);
1822 if (main_pid_ok > 0) /* It's alive */
1823 return true;
1824 if (main_pid_ok == 0) /* It's dead */
1825 return false;
1826
1827 /* OK, we don't know anything about the main PID, maybe
1828 * because there is none. Let's check the control group
1829 * instead. */
1830
1831 return cgroup_good(s) != 0;
1832 }
1833
1834 static void service_enter_running(Service *s, ServiceResult f) {
1835 assert(s);
1836
1837 if (s->result == SERVICE_SUCCESS)
1838 s->result = f;
1839
1840 service_unwatch_control_pid(s);
1841
1842 if (s->result != SERVICE_SUCCESS)
1843 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
1844 else if (service_good(s)) {
1845
1846 /* If there are any queued up sd_notify() notifications, process them now */
1847 if (s->notify_state == NOTIFY_RELOADING)
1848 service_enter_reload_by_notify(s);
1849 else if (s->notify_state == NOTIFY_STOPPING)
1850 service_enter_stop_by_notify(s);
1851 else {
1852 service_set_state(s, SERVICE_RUNNING);
1853 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1854 }
1855
1856 } else if (s->remain_after_exit)
1857 service_set_state(s, SERVICE_EXITED);
1858 else
1859 service_enter_stop(s, SERVICE_SUCCESS);
1860 }
1861
1862 static void service_enter_start_post(Service *s) {
1863 int r;
1864 assert(s);
1865
1866 service_unwatch_control_pid(s);
1867 service_reset_watchdog(s);
1868
1869 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1870 if (s->control_command) {
1871 s->control_command_id = SERVICE_EXEC_START_POST;
1872
1873 r = service_spawn(s,
1874 s->control_command,
1875 s->timeout_start_usec,
1876 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1877 &s->control_pid);
1878 if (r < 0)
1879 goto fail;
1880
1881 service_set_state(s, SERVICE_START_POST);
1882 } else
1883 service_enter_running(s, SERVICE_SUCCESS);
1884
1885 return;
1886
1887 fail:
1888 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1889 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1890 }
1891
1892 static void service_kill_control_process(Service *s) {
1893 int r;
1894
1895 assert(s);
1896
1897 if (s->control_pid <= 0)
1898 return;
1899
1900 r = kill_and_sigcont(s->control_pid, SIGKILL);
1901 if (r < 0) {
1902 _cleanup_free_ char *comm = NULL;
1903
1904 (void) get_process_comm(s->control_pid, &comm);
1905
1906 log_unit_debug_errno(UNIT(s), r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m",
1907 s->control_pid, strna(comm));
1908 }
1909 }
1910
1911 static void service_enter_start(Service *s) {
1912 ExecCommand *c;
1913 usec_t timeout;
1914 pid_t pid;
1915 int r;
1916
1917 assert(s);
1918
1919 service_unwatch_control_pid(s);
1920 service_unwatch_main_pid(s);
1921
1922 unit_warn_leftover_processes(UNIT(s));
1923
1924 if (s->type == SERVICE_FORKING) {
1925 s->control_command_id = SERVICE_EXEC_START;
1926 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1927
1928 s->main_command = NULL;
1929 } else {
1930 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1931 s->control_command = NULL;
1932
1933 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1934 }
1935
1936 if (!c) {
1937 if (s->type != SERVICE_ONESHOT) {
1938 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1939 * happen if the configuration changes at runtime. In this case, let's enter a failure
1940 * state. */
1941 log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m");
1942 r = -ENXIO;
1943 goto fail;
1944 }
1945
1946 service_enter_start_post(s);
1947 return;
1948 }
1949
1950 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1951 /* For simple + idle this is the main process. We don't apply any timeout here, but
1952 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1953 timeout = USEC_INFINITY;
1954 else
1955 timeout = s->timeout_start_usec;
1956
1957 r = service_spawn(s,
1958 c,
1959 timeout,
1960 EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1961 &pid);
1962 if (r < 0)
1963 goto fail;
1964
1965 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1966 /* For simple services we immediately start
1967 * the START_POST binaries. */
1968
1969 service_set_main_pid(s, pid);
1970 service_enter_start_post(s);
1971
1972 } else if (s->type == SERVICE_FORKING) {
1973
1974 /* For forking services we wait until the start
1975 * process exited. */
1976
1977 s->control_pid = pid;
1978 service_set_state(s, SERVICE_START);
1979
1980 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1981
1982 /* For oneshot services we wait until the start
1983 * process exited, too, but it is our main process. */
1984
1985 /* For D-Bus services we know the main pid right away,
1986 * but wait for the bus name to appear on the
1987 * bus. Notify services are similar. */
1988
1989 service_set_main_pid(s, pid);
1990 service_set_state(s, SERVICE_START);
1991 } else
1992 assert_not_reached("Unknown service type");
1993
1994 return;
1995
1996 fail:
1997 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1998 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1999 }
2000
2001 static void service_enter_start_pre(Service *s) {
2002 int r;
2003
2004 assert(s);
2005
2006 service_unwatch_control_pid(s);
2007
2008 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2009 if (s->control_command) {
2010
2011 unit_warn_leftover_processes(UNIT(s));
2012
2013 s->control_command_id = SERVICE_EXEC_START_PRE;
2014
2015 r = service_spawn(s,
2016 s->control_command,
2017 s->timeout_start_usec,
2018 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
2019 &s->control_pid);
2020 if (r < 0)
2021 goto fail;
2022
2023 service_set_state(s, SERVICE_START_PRE);
2024 } else
2025 service_enter_start(s);
2026
2027 return;
2028
2029 fail:
2030 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
2031 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2032 }
2033
2034 static void service_enter_restart(Service *s) {
2035 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2036 int r;
2037
2038 assert(s);
2039
2040 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2041 /* Don't restart things if we are going down anyway */
2042 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
2043
2044 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
2045 if (r < 0)
2046 goto fail;
2047
2048 return;
2049 }
2050
2051 /* Any units that are bound to this service must also be
2052 * restarted. We use JOB_RESTART (instead of the more obvious
2053 * JOB_START) here so that those dependency jobs will be added
2054 * as well. */
2055 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
2056 if (r < 0)
2057 goto fail;
2058
2059 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2060 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2061 * explicitly however via the usual "systemctl reset-failure" logic. */
2062 s->n_restarts ++;
2063 s->flush_n_restarts = false;
2064
2065 log_struct(LOG_INFO,
2066 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR,
2067 LOG_UNIT_ID(UNIT(s)),
2068 LOG_UNIT_INVOCATION_ID(UNIT(s)),
2069 LOG_UNIT_MESSAGE(UNIT(s), "Scheduled restart job, restart counter is at %u.", s->n_restarts),
2070 "N_RESTARTS=%u", s->n_restarts);
2071
2072 /* Notify clients about changed restart counter */
2073 unit_add_to_dbus_queue(UNIT(s));
2074
2075 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2076 * it will be canceled as part of the service_stop() call that
2077 * is executed as part of JOB_RESTART. */
2078
2079 return;
2080
2081 fail:
2082 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
2083 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2084 }
2085
2086 static void service_enter_reload_by_notify(Service *s) {
2087 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2088 int r;
2089
2090 assert(s);
2091
2092 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
2093 service_set_state(s, SERVICE_RELOAD);
2094
2095 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2096 r = manager_propagate_reload(UNIT(s)->manager, UNIT(s), JOB_FAIL, &error);
2097 if (r < 0)
2098 log_unit_warning(UNIT(s), "Failed to schedule propagation of reload: %s", bus_error_message(&error, -r));
2099 }
2100
2101 static void service_enter_reload(Service *s) {
2102 int r;
2103
2104 assert(s);
2105
2106 service_unwatch_control_pid(s);
2107 s->reload_result = SERVICE_SUCCESS;
2108
2109 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2110 if (s->control_command) {
2111 s->control_command_id = SERVICE_EXEC_RELOAD;
2112
2113 r = service_spawn(s,
2114 s->control_command,
2115 s->timeout_start_usec,
2116 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
2117 &s->control_pid);
2118 if (r < 0)
2119 goto fail;
2120
2121 service_set_state(s, SERVICE_RELOAD);
2122 } else
2123 service_enter_running(s, SERVICE_SUCCESS);
2124
2125 return;
2126
2127 fail:
2128 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
2129 s->reload_result = SERVICE_FAILURE_RESOURCES;
2130 service_enter_running(s, SERVICE_SUCCESS);
2131 }
2132
2133 static void service_run_next_control(Service *s) {
2134 usec_t timeout;
2135 int r;
2136
2137 assert(s);
2138 assert(s->control_command);
2139 assert(s->control_command->command_next);
2140
2141 assert(s->control_command_id != SERVICE_EXEC_START);
2142
2143 s->control_command = s->control_command->command_next;
2144 service_unwatch_control_pid(s);
2145
2146 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
2147 timeout = s->timeout_start_usec;
2148 else
2149 timeout = s->timeout_stop_usec;
2150
2151 r = service_spawn(s,
2152 s->control_command,
2153 timeout,
2154 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
2155 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
2156 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
2157 &s->control_pid);
2158 if (r < 0)
2159 goto fail;
2160
2161 return;
2162
2163 fail:
2164 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
2165
2166 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START_POST, SERVICE_STOP))
2167 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2168 else if (s->state == SERVICE_STOP_POST)
2169 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2170 else if (s->state == SERVICE_RELOAD) {
2171 s->reload_result = SERVICE_FAILURE_RESOURCES;
2172 service_enter_running(s, SERVICE_SUCCESS);
2173 } else
2174 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2175 }
2176
2177 static void service_run_next_main(Service *s) {
2178 pid_t pid;
2179 int r;
2180
2181 assert(s);
2182 assert(s->main_command);
2183 assert(s->main_command->command_next);
2184 assert(s->type == SERVICE_ONESHOT);
2185
2186 s->main_command = s->main_command->command_next;
2187 service_unwatch_main_pid(s);
2188
2189 r = service_spawn(s,
2190 s->main_command,
2191 s->timeout_start_usec,
2192 EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
2193 &pid);
2194 if (r < 0)
2195 goto fail;
2196
2197 service_set_main_pid(s, pid);
2198
2199 return;
2200
2201 fail:
2202 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
2203 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2204 }
2205
2206 static int service_start(Unit *u) {
2207 Service *s = SERVICE(u);
2208 int r;
2209
2210 assert(s);
2211
2212 /* We cannot fulfill this request right now, try again later
2213 * please! */
2214 if (IN_SET(s->state,
2215 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2216 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2217 return -EAGAIN;
2218
2219 /* Already on it! */
2220 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2221 return 0;
2222
2223 /* A service that will be restarted must be stopped first to
2224 * trigger BindsTo and/or OnFailure dependencies. If a user
2225 * does not want to wait for the holdoff time to elapse, the
2226 * service should be manually restarted, not started. We
2227 * simply return EAGAIN here, so that any start jobs stay
2228 * queued, and assume that the auto restart timer will
2229 * eventually trigger the restart. */
2230 if (s->state == SERVICE_AUTO_RESTART)
2231 return -EAGAIN;
2232
2233 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2234
2235 /* Make sure we don't enter a busy loop of some kind. */
2236 r = unit_start_limit_test(u);
2237 if (r < 0) {
2238 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2239 return r;
2240 }
2241
2242 r = unit_acquire_invocation_id(u);
2243 if (r < 0)
2244 return r;
2245
2246 s->result = SERVICE_SUCCESS;
2247 s->reload_result = SERVICE_SUCCESS;
2248 s->main_pid_known = false;
2249 s->main_pid_alien = false;
2250 s->forbid_restart = false;
2251
2252 u->reset_accounting = true;
2253
2254 s->status_text = mfree(s->status_text);
2255 s->status_errno = 0;
2256
2257 s->notify_state = NOTIFY_UNKNOWN;
2258
2259 s->watchdog_override_enable = false;
2260 s->watchdog_override_usec = 0;
2261
2262 /* This is not an automatic restart? Flush the restart counter then */
2263 if (s->flush_n_restarts) {
2264 s->n_restarts = 0;
2265 s->flush_n_restarts = false;
2266 }
2267
2268 service_enter_start_pre(s);
2269 return 1;
2270 }
2271
2272 static int service_stop(Unit *u) {
2273 Service *s = SERVICE(u);
2274
2275 assert(s);
2276
2277 /* Don't create restart jobs from manual stops. */
2278 s->forbid_restart = true;
2279
2280 /* Already on it */
2281 if (IN_SET(s->state,
2282 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2283 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2284 return 0;
2285
2286 /* A restart will be scheduled or is in progress. */
2287 if (s->state == SERVICE_AUTO_RESTART) {
2288 service_set_state(s, SERVICE_DEAD);
2289 return 0;
2290 }
2291
2292 /* If there's already something running we go directly into
2293 * kill mode. */
2294 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2295 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2296 return 0;
2297 }
2298
2299 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2300
2301 service_enter_stop(s, SERVICE_SUCCESS);
2302 return 1;
2303 }
2304
2305 static int service_reload(Unit *u) {
2306 Service *s = SERVICE(u);
2307
2308 assert(s);
2309
2310 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2311
2312 service_enter_reload(s);
2313 return 1;
2314 }
2315
2316 _pure_ static bool service_can_reload(Unit *u) {
2317 Service *s = SERVICE(u);
2318
2319 assert(s);
2320
2321 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2322 }
2323
2324 static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) {
2325 Service *s = SERVICE(u);
2326 unsigned idx = 0;
2327 ExecCommand *first, *c;
2328
2329 assert(s);
2330
2331 first = s->exec_command[id];
2332
2333 /* Figure out where we are in the list by walking back to the beginning */
2334 for (c = current; c != first; c = c->command_prev)
2335 idx++;
2336
2337 return idx;
2338 }
2339
2340 static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) {
2341 Service *s = SERVICE(u);
2342 ServiceExecCommand id;
2343 unsigned idx;
2344 const char *type;
2345 char **arg;
2346 _cleanup_free_ char *args = NULL, *p = NULL;
2347 size_t allocated = 0, length = 0;
2348
2349 assert(s);
2350 assert(f);
2351
2352 if (!command)
2353 return 0;
2354
2355 if (command == s->control_command) {
2356 type = "control";
2357 id = s->control_command_id;
2358 } else {
2359 type = "main";
2360 id = SERVICE_EXEC_START;
2361 }
2362
2363 idx = service_exec_command_index(u, id, command);
2364
2365 STRV_FOREACH(arg, command->argv) {
2366 size_t n;
2367 _cleanup_free_ char *e = NULL;
2368
2369 e = xescape(*arg, WHITESPACE);
2370 if (!e)
2371 return -ENOMEM;
2372
2373 n = strlen(e);
2374 if (!GREEDY_REALLOC(args, allocated, length + 1 + n + 1))
2375 return -ENOMEM;
2376
2377 if (length > 0)
2378 args[length++] = ' ';
2379
2380 memcpy(args + length, e, n);
2381 length += n;
2382 }
2383
2384 if (!GREEDY_REALLOC(args, allocated, length + 1))
2385 return -ENOMEM;
2386 args[length++] = 0;
2387
2388 p = xescape(command->path, WHITESPACE);
2389 if (!p)
2390 return -ENOMEM;
2391
2392 fprintf(f, "%s-command=%s %u %s %s\n", type, service_exec_command_to_string(id), idx, p, args);
2393
2394 return 0;
2395 }
2396
2397 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2398 Service *s = SERVICE(u);
2399 ServiceFDStore *fs;
2400 int r;
2401
2402 assert(u);
2403 assert(f);
2404 assert(fds);
2405
2406 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2407 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2408 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2409
2410 if (s->control_pid > 0)
2411 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2412
2413 if (s->main_pid_known && s->main_pid > 0)
2414 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2415
2416 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2417 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2418 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2419
2420 unit_serialize_item_format(u, f, "n-restarts", "%u", s->n_restarts);
2421 unit_serialize_item(u, f, "flush-n-restarts", yes_no(s->flush_n_restarts));
2422
2423 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2424 if (r < 0)
2425 return r;
2426
2427 service_serialize_exec_command(u, f, s->control_command);
2428 service_serialize_exec_command(u, f, s->main_command);
2429
2430 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2431 if (r < 0)
2432 return r;
2433 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2434 if (r < 0)
2435 return r;
2436 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2437 if (r < 0)
2438 return r;
2439
2440 if (UNIT_ISSET(s->accept_socket)) {
2441 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2442 if (r < 0)
2443 return r;
2444 }
2445
2446 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2447 if (r < 0)
2448 return r;
2449
2450 LIST_FOREACH(fd_store, fs, s->fd_store) {
2451 _cleanup_free_ char *c = NULL;
2452 int copy;
2453
2454 copy = fdset_put_dup(fds, fs->fd);
2455 if (copy < 0)
2456 return copy;
2457
2458 c = cescape(fs->fdname);
2459
2460 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2461 }
2462
2463 if (s->main_exec_status.pid > 0) {
2464 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2465 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2466 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2467
2468 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2469 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2470 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2471 }
2472 }
2473
2474 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2475
2476 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2477
2478 if (s->watchdog_override_enable)
2479 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2480
2481 return 0;
2482 }
2483
2484 static int service_deserialize_exec_command(Unit *u, const char *key, const char *value) {
2485 Service *s = SERVICE(u);
2486 int r;
2487 unsigned idx = 0, i;
2488 bool control, found = false;
2489 ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID;
2490 ExecCommand *command = NULL;
2491 _cleanup_free_ char *path = NULL;
2492 _cleanup_strv_free_ char **argv = NULL;
2493
2494 enum ExecCommandState {
2495 STATE_EXEC_COMMAND_TYPE,
2496 STATE_EXEC_COMMAND_INDEX,
2497 STATE_EXEC_COMMAND_PATH,
2498 STATE_EXEC_COMMAND_ARGS,
2499 _STATE_EXEC_COMMAND_MAX,
2500 _STATE_EXEC_COMMAND_INVALID = -1,
2501 } state;
2502
2503 assert(s);
2504 assert(key);
2505 assert(value);
2506
2507 control = streq(key, "control-command");
2508
2509 state = STATE_EXEC_COMMAND_TYPE;
2510
2511 for (;;) {
2512 _cleanup_free_ char *arg = NULL;
2513
2514 r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE);
2515 if (r == 0)
2516 break;
2517 else if (r < 0)
2518 return r;
2519
2520 switch (state) {
2521 case STATE_EXEC_COMMAND_TYPE:
2522 id = service_exec_command_from_string(arg);
2523 if (id < 0)
2524 return -EINVAL;
2525
2526 state = STATE_EXEC_COMMAND_INDEX;
2527 break;
2528 case STATE_EXEC_COMMAND_INDEX:
2529 r = safe_atou(arg, &idx);
2530 if (r < 0)
2531 return -EINVAL;
2532
2533 state = STATE_EXEC_COMMAND_PATH;
2534 break;
2535 case STATE_EXEC_COMMAND_PATH:
2536 path = TAKE_PTR(arg);
2537 state = STATE_EXEC_COMMAND_ARGS;
2538
2539 if (!path_is_absolute(path))
2540 return -EINVAL;
2541 break;
2542 case STATE_EXEC_COMMAND_ARGS:
2543 r = strv_extend(&argv, arg);
2544 if (r < 0)
2545 return -ENOMEM;
2546 break;
2547 default:
2548 assert_not_reached("Unknown error at deserialization of exec command");
2549 break;
2550 }
2551 }
2552
2553 if (state != STATE_EXEC_COMMAND_ARGS)
2554 return -EINVAL;
2555
2556 /* Let's check whether exec command on given offset matches data that we just deserialized */
2557 for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) {
2558 if (i != idx)
2559 continue;
2560
2561 found = strv_equal(argv, command->argv) && streq(command->path, path);
2562 break;
2563 }
2564
2565 if (!found) {
2566 /* Command at the index we serialized is different, let's look for command that exactly
2567 * matches but is on different index. If there is no such command we will not resume execution. */
2568 for (command = s->exec_command[id]; command; command = command->command_next)
2569 if (strv_equal(command->argv, argv) && streq(command->path, path))
2570 break;
2571 }
2572
2573 if (command && control)
2574 s->control_command = command;
2575 else if (command)
2576 s->main_command = command;
2577 else
2578 log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2579
2580 return 0;
2581 }
2582
2583 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2584 Service *s = SERVICE(u);
2585 int r;
2586
2587 assert(u);
2588 assert(key);
2589 assert(value);
2590 assert(fds);
2591
2592 if (streq(key, "state")) {
2593 ServiceState state;
2594
2595 state = service_state_from_string(value);
2596 if (state < 0)
2597 log_unit_debug(u, "Failed to parse state value: %s", value);
2598 else
2599 s->deserialized_state = state;
2600 } else if (streq(key, "result")) {
2601 ServiceResult f;
2602
2603 f = service_result_from_string(value);
2604 if (f < 0)
2605 log_unit_debug(u, "Failed to parse result value: %s", value);
2606 else if (f != SERVICE_SUCCESS)
2607 s->result = f;
2608
2609 } else if (streq(key, "reload-result")) {
2610 ServiceResult f;
2611
2612 f = service_result_from_string(value);
2613 if (f < 0)
2614 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2615 else if (f != SERVICE_SUCCESS)
2616 s->reload_result = f;
2617
2618 } else if (streq(key, "control-pid")) {
2619 pid_t pid;
2620
2621 if (parse_pid(value, &pid) < 0)
2622 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2623 else
2624 s->control_pid = pid;
2625 } else if (streq(key, "main-pid")) {
2626 pid_t pid;
2627
2628 if (parse_pid(value, &pid) < 0)
2629 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2630 else
2631 (void) service_set_main_pid(s, pid);
2632 } else if (streq(key, "main-pid-known")) {
2633 int b;
2634
2635 b = parse_boolean(value);
2636 if (b < 0)
2637 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2638 else
2639 s->main_pid_known = b;
2640 } else if (streq(key, "bus-name-good")) {
2641 int b;
2642
2643 b = parse_boolean(value);
2644 if (b < 0)
2645 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2646 else
2647 s->bus_name_good = b;
2648 } else if (streq(key, "bus-name-owner")) {
2649 r = free_and_strdup(&s->bus_name_owner, value);
2650 if (r < 0)
2651 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2652 } else if (streq(key, "status-text")) {
2653 char *t;
2654
2655 r = cunescape(value, 0, &t);
2656 if (r < 0)
2657 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2658 else {
2659 free(s->status_text);
2660 s->status_text = t;
2661 }
2662
2663 } else if (streq(key, "accept-socket")) {
2664 Unit *socket;
2665
2666 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2667 if (r < 0)
2668 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2669 else {
2670 unit_ref_set(&s->accept_socket, u, socket);
2671 SOCKET(socket)->n_connections++;
2672 }
2673
2674 } else if (streq(key, "socket-fd")) {
2675 int fd;
2676
2677 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2678 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2679 else {
2680 asynchronous_close(s->socket_fd);
2681 s->socket_fd = fdset_remove(fds, fd);
2682 }
2683 } else if (streq(key, "fd-store-fd")) {
2684 const char *fdv;
2685 size_t pf;
2686 int fd;
2687
2688 pf = strcspn(value, WHITESPACE);
2689 fdv = strndupa(value, pf);
2690
2691 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2692 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2693 else {
2694 _cleanup_free_ char *t = NULL;
2695 const char *fdn;
2696
2697 fdn = value + pf;
2698 fdn += strspn(fdn, WHITESPACE);
2699 (void) cunescape(fdn, 0, &t);
2700
2701 r = service_add_fd_store(s, fd, t);
2702 if (r < 0)
2703 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2704 else
2705 fdset_remove(fds, fd);
2706 }
2707
2708 } else if (streq(key, "main-exec-status-pid")) {
2709 pid_t pid;
2710
2711 if (parse_pid(value, &pid) < 0)
2712 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2713 else
2714 s->main_exec_status.pid = pid;
2715 } else if (streq(key, "main-exec-status-code")) {
2716 int i;
2717
2718 if (safe_atoi(value, &i) < 0)
2719 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2720 else
2721 s->main_exec_status.code = i;
2722 } else if (streq(key, "main-exec-status-status")) {
2723 int i;
2724
2725 if (safe_atoi(value, &i) < 0)
2726 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2727 else
2728 s->main_exec_status.status = i;
2729 } else if (streq(key, "main-exec-status-start"))
2730 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2731 else if (streq(key, "main-exec-status-exit"))
2732 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2733 else if (streq(key, "watchdog-timestamp"))
2734 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2735 else if (streq(key, "forbid-restart")) {
2736 int b;
2737
2738 b = parse_boolean(value);
2739 if (b < 0)
2740 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2741 else
2742 s->forbid_restart = b;
2743 } else if (streq(key, "stdin-fd")) {
2744 int fd;
2745
2746 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2747 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2748 else {
2749 asynchronous_close(s->stdin_fd);
2750 s->stdin_fd = fdset_remove(fds, fd);
2751 s->exec_context.stdio_as_fds = true;
2752 }
2753 } else if (streq(key, "stdout-fd")) {
2754 int fd;
2755
2756 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2757 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2758 else {
2759 asynchronous_close(s->stdout_fd);
2760 s->stdout_fd = fdset_remove(fds, fd);
2761 s->exec_context.stdio_as_fds = true;
2762 }
2763 } else if (streq(key, "stderr-fd")) {
2764 int fd;
2765
2766 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2767 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2768 else {
2769 asynchronous_close(s->stderr_fd);
2770 s->stderr_fd = fdset_remove(fds, fd);
2771 s->exec_context.stdio_as_fds = true;
2772 }
2773 } else if (streq(key, "watchdog-override-usec")) {
2774 usec_t watchdog_override_usec;
2775 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2776 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2777 else {
2778 s->watchdog_override_enable = true;
2779 s->watchdog_override_usec = watchdog_override_usec;
2780 }
2781 } else if (STR_IN_SET(key, "main-command", "control-command")) {
2782 r = service_deserialize_exec_command(u, key, value);
2783 if (r < 0)
2784 log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value);
2785
2786 } else if (streq(key, "n-restarts")) {
2787 r = safe_atou(value, &s->n_restarts);
2788 if (r < 0)
2789 log_unit_debug_errno(u, r, "Failed to parse serialized restart counter '%s': %m", value);
2790
2791 } else if (streq(key, "flush-n-restarts")) {
2792 r = parse_boolean(value);
2793 if (r < 0)
2794 log_unit_debug_errno(u, r, "Failed to parse serialized flush restart counter setting '%s': %m", value);
2795 else
2796 s->flush_n_restarts = r;
2797 } else
2798 log_unit_debug(u, "Unknown serialization key: %s", key);
2799
2800 return 0;
2801 }
2802
2803 _pure_ static UnitActiveState service_active_state(Unit *u) {
2804 const UnitActiveState *table;
2805
2806 assert(u);
2807
2808 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2809
2810 return table[SERVICE(u)->state];
2811 }
2812
2813 static const char *service_sub_state_to_string(Unit *u) {
2814 assert(u);
2815
2816 return service_state_to_string(SERVICE(u)->state);
2817 }
2818
2819 static bool service_may_gc(Unit *u) {
2820 Service *s = SERVICE(u);
2821
2822 assert(s);
2823
2824 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2825 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2826 * have moved outside of the cgroup. */
2827
2828 if (main_pid_good(s) > 0 ||
2829 control_pid_good(s) > 0)
2830 return false;
2831
2832 return true;
2833 }
2834
2835 static int service_retry_pid_file(Service *s) {
2836 int r;
2837
2838 assert(s->pid_file);
2839 assert(IN_SET(s->state, SERVICE_START, SERVICE_START_POST));
2840
2841 r = service_load_pid_file(s, false);
2842 if (r < 0)
2843 return r;
2844
2845 service_unwatch_pid_file(s);
2846
2847 service_enter_running(s, SERVICE_SUCCESS);
2848 return 0;
2849 }
2850
2851 static int service_watch_pid_file(Service *s) {
2852 int r;
2853
2854 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2855
2856 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2857 if (r < 0)
2858 goto fail;
2859
2860 /* the pidfile might have appeared just before we set the watch */
2861 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2862 service_retry_pid_file(s);
2863
2864 return 0;
2865 fail:
2866 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2867 service_unwatch_pid_file(s);
2868 return r;
2869 }
2870
2871 static int service_demand_pid_file(Service *s) {
2872 PathSpec *ps;
2873
2874 assert(s->pid_file);
2875 assert(!s->pid_file_pathspec);
2876
2877 ps = new0(PathSpec, 1);
2878 if (!ps)
2879 return -ENOMEM;
2880
2881 ps->unit = UNIT(s);
2882 ps->path = strdup(s->pid_file);
2883 if (!ps->path) {
2884 free(ps);
2885 return -ENOMEM;
2886 }
2887
2888 path_simplify(ps->path, false);
2889
2890 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2891 * keep their PID file open all the time. */
2892 ps->type = PATH_MODIFIED;
2893 ps->inotify_fd = -1;
2894
2895 s->pid_file_pathspec = ps;
2896
2897 return service_watch_pid_file(s);
2898 }
2899
2900 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2901 PathSpec *p = userdata;
2902 Service *s;
2903
2904 assert(p);
2905
2906 s = SERVICE(p->unit);
2907
2908 assert(s);
2909 assert(fd >= 0);
2910 assert(IN_SET(s->state, SERVICE_START, SERVICE_START_POST));
2911 assert(s->pid_file_pathspec);
2912 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2913
2914 log_unit_debug(UNIT(s), "inotify event");
2915
2916 if (path_spec_fd_event(p, events) < 0)
2917 goto fail;
2918
2919 if (service_retry_pid_file(s) == 0)
2920 return 0;
2921
2922 if (service_watch_pid_file(s) < 0)
2923 goto fail;
2924
2925 return 0;
2926
2927 fail:
2928 service_unwatch_pid_file(s);
2929 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2930 return 0;
2931 }
2932
2933 static void service_notify_cgroup_empty_event(Unit *u) {
2934 Service *s = SERVICE(u);
2935
2936 assert(u);
2937
2938 log_unit_debug(u, "cgroup is empty");
2939
2940 switch (s->state) {
2941
2942 /* Waiting for SIGCHLD is usually more interesting,
2943 * because it includes return codes/signals. Which is
2944 * why we ignore the cgroup events for most cases,
2945 * except when we don't know pid which to expect the
2946 * SIGCHLD for. */
2947
2948 case SERVICE_START:
2949 if (s->type == SERVICE_NOTIFY &&
2950 main_pid_good(s) == 0 &&
2951 control_pid_good(s) == 0) {
2952 /* No chance of getting a ready notification anymore */
2953 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2954 break;
2955 }
2956
2957 _fallthrough_;
2958 case SERVICE_START_POST:
2959 if (s->pid_file_pathspec &&
2960 main_pid_good(s) == 0 &&
2961 control_pid_good(s) == 0) {
2962
2963 /* Give up hoping for the daemon to write its PID file */
2964 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2965
2966 service_unwatch_pid_file(s);
2967 if (s->state == SERVICE_START)
2968 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2969 else
2970 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
2971 }
2972 break;
2973
2974 case SERVICE_RUNNING:
2975 /* service_enter_running() will figure out what to do */
2976 service_enter_running(s, SERVICE_SUCCESS);
2977 break;
2978
2979 case SERVICE_STOP_SIGABRT:
2980 case SERVICE_STOP_SIGTERM:
2981 case SERVICE_STOP_SIGKILL:
2982
2983 if (main_pid_good(s) <= 0 && control_pid_good(s) <= 0)
2984 service_enter_stop_post(s, SERVICE_SUCCESS);
2985
2986 break;
2987
2988 case SERVICE_STOP_POST:
2989 case SERVICE_FINAL_SIGTERM:
2990 case SERVICE_FINAL_SIGKILL:
2991 if (main_pid_good(s) <= 0 && control_pid_good(s) <= 0)
2992 service_enter_dead(s, SERVICE_SUCCESS, true);
2993
2994 break;
2995
2996 default:
2997 ;
2998 }
2999 }
3000
3001 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
3002 bool notify_dbus = true;
3003 Service *s = SERVICE(u);
3004 ServiceResult f;
3005
3006 assert(s);
3007 assert(pid >= 0);
3008
3009 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
3010 f = SERVICE_SUCCESS;
3011 else if (code == CLD_EXITED)
3012 f = SERVICE_FAILURE_EXIT_CODE;
3013 else if (code == CLD_KILLED)
3014 f = SERVICE_FAILURE_SIGNAL;
3015 else if (code == CLD_DUMPED)
3016 f = SERVICE_FAILURE_CORE_DUMP;
3017 else
3018 assert_not_reached("Unknown code");
3019
3020 if (s->main_pid == pid) {
3021 /* Forking services may occasionally move to a new PID.
3022 * As long as they update the PID file before exiting the old
3023 * PID, they're fine. */
3024 if (service_load_pid_file(s, false) > 0)
3025 return;
3026
3027 s->main_pid = 0;
3028 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
3029
3030 if (s->main_command) {
3031 /* If this is not a forking service than the
3032 * main process got started and hence we copy
3033 * the exit status so that it is recorded both
3034 * as main and as control process exit
3035 * status */
3036
3037 s->main_command->exec_status = s->main_exec_status;
3038
3039 if (s->main_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
3040 f = SERVICE_SUCCESS;
3041 } else if (s->exec_command[SERVICE_EXEC_START]) {
3042
3043 /* If this is a forked process, then we should
3044 * ignore the return value if this was
3045 * configured for the starter process */
3046
3047 if (s->exec_command[SERVICE_EXEC_START]->flags & EXEC_COMMAND_IGNORE_FAILURE)
3048 f = SERVICE_SUCCESS;
3049 }
3050
3051 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3052 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3053 * that the service already logged the reason at a higher log level on its own. However, if the service
3054 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
3055 * our log level to WARNING then. */
3056
3057 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
3058 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
3059 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
3060 sigchld_code_to_string(code), status,
3061 strna(code == CLD_EXITED
3062 ? exit_status_to_string(status, EXIT_STATUS_FULL)
3063 : signal_to_string(status))),
3064 "EXIT_CODE=%s", sigchld_code_to_string(code),
3065 "EXIT_STATUS=%i", status,
3066 LOG_UNIT_ID(u),
3067 LOG_UNIT_INVOCATION_ID(u));
3068
3069 if (s->result == SERVICE_SUCCESS)
3070 s->result = f;
3071
3072 if (s->main_command &&
3073 s->main_command->command_next &&
3074 s->type == SERVICE_ONESHOT &&
3075 f == SERVICE_SUCCESS) {
3076
3077 /* There is another command to *
3078 * execute, so let's do that. */
3079
3080 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
3081 service_run_next_main(s);
3082
3083 } else {
3084
3085 /* The service exited, so the service is officially
3086 * gone. */
3087 s->main_command = NULL;
3088
3089 switch (s->state) {
3090
3091 case SERVICE_START_POST:
3092 case SERVICE_RELOAD:
3093 case SERVICE_STOP:
3094 /* Need to wait until the operation is
3095 * done */
3096 break;
3097
3098 case SERVICE_START:
3099 if (s->type == SERVICE_ONESHOT) {
3100 /* This was our main goal, so let's go on */
3101 if (f == SERVICE_SUCCESS)
3102 service_enter_start_post(s);
3103 else
3104 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3105 break;
3106 } else if (s->type == SERVICE_NOTIFY) {
3107 /* Only enter running through a notification, so that the
3108 * SERVICE_START state signifies that no ready notification
3109 * has been received */
3110 if (f != SERVICE_SUCCESS)
3111 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3112 else if (!s->remain_after_exit || s->notify_access == NOTIFY_MAIN)
3113 /* The service has never been and will never be active */
3114 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3115 break;
3116 }
3117
3118 _fallthrough_;
3119 case SERVICE_RUNNING:
3120 service_enter_running(s, f);
3121 break;
3122
3123 case SERVICE_STOP_SIGABRT:
3124 case SERVICE_STOP_SIGTERM:
3125 case SERVICE_STOP_SIGKILL:
3126
3127 if (control_pid_good(s) <= 0)
3128 service_enter_stop_post(s, f);
3129
3130 /* If there is still a control process, wait for that first */
3131 break;
3132
3133 case SERVICE_STOP_POST:
3134 case SERVICE_FINAL_SIGTERM:
3135 case SERVICE_FINAL_SIGKILL:
3136
3137 if (control_pid_good(s) <= 0)
3138 service_enter_dead(s, f, true);
3139 break;
3140
3141 default:
3142 assert_not_reached("Uh, main process died at wrong time.");
3143 }
3144 }
3145
3146 } else if (s->control_pid == pid) {
3147 s->control_pid = 0;
3148
3149 if (s->control_command) {
3150 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
3151
3152 if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
3153 f = SERVICE_SUCCESS;
3154 }
3155
3156 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
3157 "Control process exited, code=%s status=%i",
3158 sigchld_code_to_string(code), status);
3159
3160 if (s->result == SERVICE_SUCCESS)
3161 s->result = f;
3162
3163 if (s->control_command &&
3164 s->control_command->command_next &&
3165 f == SERVICE_SUCCESS) {
3166
3167 /* There is another command to *
3168 * execute, so let's do that. */
3169
3170 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
3171 service_run_next_control(s);
3172
3173 } else {
3174 /* No further commands for this step, so let's
3175 * figure out what to do next */
3176
3177 s->control_command = NULL;
3178 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3179
3180 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
3181
3182 switch (s->state) {
3183
3184 case SERVICE_START_PRE:
3185 if (f == SERVICE_SUCCESS)
3186 service_enter_start(s);
3187 else
3188 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3189 break;
3190
3191 case SERVICE_START:
3192 if (s->type != SERVICE_FORKING)
3193 /* Maybe spurious event due to a reload that changed the type? */
3194 break;
3195
3196 if (f != SERVICE_SUCCESS) {
3197 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3198 break;
3199 }
3200
3201 if (s->pid_file) {
3202 bool has_start_post;
3203 int r;
3204
3205 /* Let's try to load the pid file here if we can.
3206 * The PID file might actually be created by a START_POST
3207 * script. In that case don't worry if the loading fails. */
3208
3209 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3210 r = service_load_pid_file(s, !has_start_post);
3211 if (!has_start_post && r < 0) {
3212 r = service_demand_pid_file(s);
3213 if (r < 0 || cgroup_good(s) == 0)
3214 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3215 break;
3216 }
3217 } else
3218 service_search_main_pid(s);
3219
3220 service_enter_start_post(s);
3221 break;
3222
3223 case SERVICE_START_POST:
3224 if (f != SERVICE_SUCCESS) {
3225 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3226 break;
3227 }
3228
3229 if (s->pid_file) {
3230 int r;
3231
3232 r = service_load_pid_file(s, true);
3233 if (r < 0) {
3234 r = service_demand_pid_file(s);
3235 if (r < 0 || cgroup_good(s) == 0)
3236 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
3237 break;
3238 }
3239 } else
3240 service_search_main_pid(s);
3241
3242 service_enter_running(s, SERVICE_SUCCESS);
3243 break;
3244
3245 case SERVICE_RELOAD:
3246 if (f == SERVICE_SUCCESS)
3247 if (service_load_pid_file(s, true) < 0)
3248 service_search_main_pid(s);
3249
3250 s->reload_result = f;
3251 service_enter_running(s, SERVICE_SUCCESS);
3252 break;
3253
3254 case SERVICE_STOP:
3255 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3256 break;
3257
3258 case SERVICE_STOP_SIGABRT:
3259 case SERVICE_STOP_SIGTERM:
3260 case SERVICE_STOP_SIGKILL:
3261 if (main_pid_good(s) <= 0)
3262 service_enter_stop_post(s, f);
3263
3264 /* If there is still a service
3265 * process around, wait until
3266 * that one quit, too */
3267 break;
3268
3269 case SERVICE_STOP_POST:
3270 case SERVICE_FINAL_SIGTERM:
3271 case SERVICE_FINAL_SIGKILL:
3272 if (main_pid_good(s) <= 0)
3273 service_enter_dead(s, f, true);
3274 break;
3275
3276 default:
3277 assert_not_reached("Uh, control process died at wrong time.");
3278 }
3279 }
3280 } else /* Neither control nor main PID? If so, don't notify about anything */
3281 notify_dbus = false;
3282
3283 /* Notify clients about changed exit status */
3284 if (notify_dbus)
3285 unit_add_to_dbus_queue(u);
3286
3287 /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to watch,
3288 * under the assumption that we'll sooner or later get a SIGCHLD for them, as the original process we watched
3289 * was probably the parent of them, and they are hence now our children. */
3290 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3291 unit_watch_all_pids(u);
3292
3293 /* If the PID set is empty now, then let's check if the cgroup is empty too and finish off the unit. */
3294 unit_synthesize_cgroup_empty_event(u);
3295 }
3296
3297 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3298 Service *s = SERVICE(userdata);
3299
3300 assert(s);
3301 assert(source == s->timer_event_source);
3302
3303 switch (s->state) {
3304
3305 case SERVICE_START_PRE:
3306 case SERVICE_START:
3307 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
3308 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3309 break;
3310
3311 case SERVICE_START_POST:
3312 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
3313 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3314 break;
3315
3316 case SERVICE_RUNNING:
3317 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
3318 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3319 break;
3320
3321 case SERVICE_RELOAD:
3322 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
3323 service_kill_control_process(s);
3324 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3325 service_enter_running(s, SERVICE_SUCCESS);
3326 break;
3327
3328 case SERVICE_STOP:
3329 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
3330 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3331 break;
3332
3333 case SERVICE_STOP_SIGABRT:
3334 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
3335 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3336 break;
3337
3338 case SERVICE_STOP_SIGTERM:
3339 if (s->kill_context.send_sigkill) {
3340 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
3341 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3342 } else {
3343 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3344 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3345 }
3346
3347 break;
3348
3349 case SERVICE_STOP_SIGKILL:
3350 /* Uh, we sent a SIGKILL and it is still not gone?
3351 * Must be something we cannot kill, so let's just be
3352 * weirded out and continue */
3353
3354 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
3355 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3356 break;
3357
3358 case SERVICE_STOP_POST:
3359 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
3360 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3361 break;
3362
3363 case SERVICE_FINAL_SIGTERM:
3364 if (s->kill_context.send_sigkill) {
3365 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
3366 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3367 } else {
3368 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3369 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3370 }
3371
3372 break;
3373
3374 case SERVICE_FINAL_SIGKILL:
3375 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
3376 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3377 break;
3378
3379 case SERVICE_AUTO_RESTART:
3380 if (s->restart_usec > 0) {
3381 char buf_restart[FORMAT_TIMESPAN_MAX];
3382 log_unit_info(UNIT(s),
3383 "Service RestartSec=%s expired, scheduling restart.",
3384 format_timespan(buf_restart, sizeof buf_restart, s->restart_usec, USEC_PER_SEC));
3385 } else
3386 log_unit_info(UNIT(s),
3387 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3388
3389 service_enter_restart(s);
3390 break;
3391
3392 default:
3393 assert_not_reached("Timeout at wrong time.");
3394 }
3395
3396 return 0;
3397 }
3398
3399 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3400 Service *s = SERVICE(userdata);
3401 char t[FORMAT_TIMESPAN_MAX];
3402 usec_t watchdog_usec;
3403
3404 assert(s);
3405 assert(source == s->watchdog_event_source);
3406
3407 watchdog_usec = service_get_watchdog_usec(s);
3408
3409 if (UNIT(s)->manager->service_watchdogs) {
3410 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3411 format_timespan(t, sizeof(t), watchdog_usec, 1));
3412
3413 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3414 } else
3415 log_unit_warning(UNIT(s), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3416 format_timespan(t, sizeof(t), watchdog_usec, 1));
3417
3418 return 0;
3419 }
3420
3421 static bool service_notify_message_authorized(Service *s, pid_t pid, char **tags, FDSet *fds) {
3422 assert(s);
3423
3424 if (s->notify_access == NOTIFY_NONE) {
3425 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3426 return false;
3427 }
3428
3429 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3430 if (s->main_pid != 0)
3431 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3432 else
3433 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3434
3435 return false;
3436 }
3437
3438 if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) {
3439 if (s->main_pid != 0 && s->control_pid != 0)
3440 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT" and control PID "PID_FMT,
3441 pid, s->main_pid, s->control_pid);
3442 else if (s->main_pid != 0)
3443 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3444 else if (s->control_pid != 0)
3445 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid);
3446 else
3447 log_unit_warning(UNIT(s), "Got notification message from PID "PID_FMT", but reception only permitted for main PID and control PID which are currently not known", pid);
3448
3449 return false;
3450 }
3451
3452 return true;
3453 }
3454
3455 static void service_notify_message(
3456 Unit *u,
3457 const struct ucred *ucred,
3458 char **tags,
3459 FDSet *fds) {
3460
3461 Service *s = SERVICE(u);
3462 bool notify_dbus = false;
3463 const char *e;
3464 char **i;
3465 int r;
3466
3467 assert(u);
3468 assert(ucred);
3469
3470 if (!service_notify_message_authorized(SERVICE(u), ucred->pid, tags, fds))
3471 return;
3472
3473 if (DEBUG_LOGGING) {
3474 _cleanup_free_ char *cc = NULL;
3475
3476 cc = strv_join(tags, ", ");
3477 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", ucred->pid, isempty(cc) ? "n/a" : cc);
3478 }
3479
3480 /* Interpret MAINPID= */
3481 e = strv_find_startswith(tags, "MAINPID=");
3482 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3483 pid_t new_main_pid;
3484
3485 if (parse_pid(e, &new_main_pid) < 0)
3486 log_unit_warning(u, "Failed to parse MAINPID= field in notification message, ignoring: %s", e);
3487 else if (!s->main_pid_known || new_main_pid != s->main_pid) {
3488
3489 r = service_is_suitable_main_pid(s, new_main_pid, LOG_WARNING);
3490 if (r == 0) {
3491 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3492
3493 if (ucred->uid == 0) {
3494 log_unit_debug(u, "New main PID "PID_FMT" does not belong to service, but we'll accept it as the request to change it came from a privileged process.", new_main_pid);
3495 r = 1;
3496 } else
3497 log_unit_debug(u, "New main PID "PID_FMT" does not belong to service, refusing.", new_main_pid);
3498 }
3499 if (r > 0) {
3500 service_set_main_pid(s, new_main_pid);
3501 unit_watch_pid(UNIT(s), new_main_pid);
3502 notify_dbus = true;
3503 }
3504 }
3505 }
3506
3507 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3508 STRV_FOREACH_BACKWARDS(i, tags) {
3509
3510 if (streq(*i, "READY=1")) {
3511 s->notify_state = NOTIFY_READY;
3512
3513 /* Type=notify services inform us about completed
3514 * initialization with READY=1 */
3515 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3516 service_enter_start_post(s);
3517
3518 /* Sending READY=1 while we are reloading informs us
3519 * that the reloading is complete */
3520 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3521 service_enter_running(s, SERVICE_SUCCESS);
3522
3523 notify_dbus = true;
3524 break;
3525
3526 } else if (streq(*i, "RELOADING=1")) {
3527 s->notify_state = NOTIFY_RELOADING;
3528
3529 if (s->state == SERVICE_RUNNING)
3530 service_enter_reload_by_notify(s);
3531
3532 notify_dbus = true;
3533 break;
3534
3535 } else if (streq(*i, "STOPPING=1")) {
3536 s->notify_state = NOTIFY_STOPPING;
3537
3538 if (s->state == SERVICE_RUNNING)
3539 service_enter_stop_by_notify(s);
3540
3541 notify_dbus = true;
3542 break;
3543 }
3544 }
3545
3546 /* Interpret STATUS= */
3547 e = strv_find_startswith(tags, "STATUS=");
3548 if (e) {
3549 _cleanup_free_ char *t = NULL;
3550
3551 if (!isempty(e)) {
3552 if (!utf8_is_valid(e))
3553 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3554 else {
3555 t = strdup(e);
3556 if (!t)
3557 log_oom();
3558 }
3559 }
3560
3561 if (!streq_ptr(s->status_text, t)) {
3562 free_and_replace(s->status_text, t);
3563 notify_dbus = true;
3564 }
3565 }
3566
3567 /* Interpret ERRNO= */
3568 e = strv_find_startswith(tags, "ERRNO=");
3569 if (e) {
3570 int status_errno;
3571
3572 status_errno = parse_errno(e);
3573 if (status_errno < 0)
3574 log_unit_warning_errno(u, status_errno,
3575 "Failed to parse ERRNO= field in notification message: %s", e);
3576 else if (s->status_errno != status_errno) {
3577 s->status_errno = status_errno;
3578 notify_dbus = true;
3579 }
3580 }
3581
3582 /* Interpret EXTEND_TIMEOUT= */
3583 e = strv_find_startswith(tags, "EXTEND_TIMEOUT_USEC=");
3584 if (e) {
3585 usec_t extend_timeout_usec;
3586 if (safe_atou64(e, &extend_timeout_usec) < 0)
3587 log_unit_warning(u, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e);
3588 else
3589 service_extend_timeout(s, extend_timeout_usec);
3590 }
3591
3592 /* Interpret WATCHDOG= */
3593 if (strv_find(tags, "WATCHDOG=1"))
3594 service_reset_watchdog(s);
3595
3596 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3597 if (e) {
3598 usec_t watchdog_override_usec;
3599 if (safe_atou64(e, &watchdog_override_usec) < 0)
3600 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3601 else
3602 service_reset_watchdog_timeout(s, watchdog_override_usec);
3603 }
3604
3605 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3606 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3607 * fds, but optional when pushing in new fds, for compatibility reasons. */
3608 if (strv_find(tags, "FDSTOREREMOVE=1")) {
3609 const char *name;
3610
3611 name = strv_find_startswith(tags, "FDNAME=");
3612 if (!name || !fdname_is_valid(name))
3613 log_unit_warning(u, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3614 else
3615 service_remove_fd_store(s, name);
3616
3617 } else if (strv_find(tags, "FDSTORE=1")) {
3618 const char *name;
3619
3620 name = strv_find_startswith(tags, "FDNAME=");
3621 if (name && !fdname_is_valid(name)) {
3622 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3623 name = NULL;
3624 }
3625
3626 (void) service_add_fd_store_set(s, fds, name);
3627 }
3628
3629 /* Notify clients about changed status or main pid */
3630 if (notify_dbus)
3631 unit_add_to_dbus_queue(u);
3632 }
3633
3634 static int service_get_timeout(Unit *u, usec_t *timeout) {
3635 Service *s = SERVICE(u);
3636 uint64_t t;
3637 int r;
3638
3639 if (!s->timer_event_source)
3640 return 0;
3641
3642 r = sd_event_source_get_time(s->timer_event_source, &t);
3643 if (r < 0)
3644 return r;
3645 if (t == USEC_INFINITY)
3646 return 0;
3647
3648 *timeout = t;
3649 return 1;
3650 }
3651
3652 static void service_bus_name_owner_change(
3653 Unit *u,
3654 const char *name,
3655 const char *old_owner,
3656 const char *new_owner) {
3657
3658 Service *s = SERVICE(u);
3659 int r;
3660
3661 assert(s);
3662 assert(name);
3663
3664 assert(streq(s->bus_name, name));
3665 assert(old_owner || new_owner);
3666
3667 if (old_owner && new_owner)
3668 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3669 else if (old_owner)
3670 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3671 else
3672 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3673
3674 s->bus_name_good = !!new_owner;
3675
3676 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3677 r = free_and_strdup(&s->bus_name_owner, new_owner);
3678 if (r < 0) {
3679 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3680 return;
3681 }
3682
3683 if (s->type == SERVICE_DBUS) {
3684
3685 /* service_enter_running() will figure out what to
3686 * do */
3687 if (s->state == SERVICE_RUNNING)
3688 service_enter_running(s, SERVICE_SUCCESS);
3689 else if (s->state == SERVICE_START && new_owner)
3690 service_enter_start_post(s);
3691
3692 } else if (new_owner &&
3693 s->main_pid <= 0 &&
3694 IN_SET(s->state,
3695 SERVICE_START,
3696 SERVICE_START_POST,
3697 SERVICE_RUNNING,
3698 SERVICE_RELOAD)) {
3699
3700 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3701 pid_t pid;
3702
3703 /* Try to acquire PID from bus service */
3704
3705 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3706 if (r >= 0)
3707 r = sd_bus_creds_get_pid(creds, &pid);
3708 if (r >= 0) {
3709 log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, name, pid);
3710
3711 service_set_main_pid(s, pid);
3712 unit_watch_pid(UNIT(s), pid);
3713 }
3714 }
3715 }
3716
3717 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3718 _cleanup_free_ char *peer = NULL;
3719 int r;
3720
3721 assert(s);
3722 assert(fd >= 0);
3723
3724 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3725 * to be configured. We take ownership of the passed fd on success. */
3726
3727 if (UNIT(s)->load_state != UNIT_LOADED)
3728 return -EINVAL;
3729
3730 if (s->socket_fd >= 0)
3731 return -EBUSY;
3732
3733 if (s->state != SERVICE_DEAD)
3734 return -EAGAIN;
3735
3736 if (getpeername_pretty(fd, true, &peer) >= 0) {
3737
3738 if (UNIT(s)->description) {
3739 _cleanup_free_ char *a;
3740
3741 a = strjoin(UNIT(s)->description, " (", peer, ")");
3742 if (!a)
3743 return -ENOMEM;
3744
3745 r = unit_set_description(UNIT(s), a);
3746 } else
3747 r = unit_set_description(UNIT(s), peer);
3748
3749 if (r < 0)
3750 return r;
3751 }
3752
3753 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false, UNIT_DEPENDENCY_IMPLICIT);
3754 if (r < 0)
3755 return r;
3756
3757 s->socket_fd = fd;
3758 s->socket_fd_selinux_context_net = selinux_context_net;
3759
3760 unit_ref_set(&s->accept_socket, UNIT(s), UNIT(sock));
3761 return 0;
3762 }
3763
3764 static void service_reset_failed(Unit *u) {
3765 Service *s = SERVICE(u);
3766
3767 assert(s);
3768
3769 if (s->state == SERVICE_FAILED)
3770 service_set_state(s, SERVICE_DEAD);
3771
3772 s->result = SERVICE_SUCCESS;
3773 s->reload_result = SERVICE_SUCCESS;
3774 s->n_restarts = 0;
3775 s->flush_n_restarts = false;
3776 }
3777
3778 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3779 Service *s = SERVICE(u);
3780
3781 assert(s);
3782
3783 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3784 }
3785
3786 static int service_main_pid(Unit *u) {
3787 Service *s = SERVICE(u);
3788
3789 assert(s);
3790
3791 return s->main_pid;
3792 }
3793
3794 static int service_control_pid(Unit *u) {
3795 Service *s = SERVICE(u);
3796
3797 assert(s);
3798
3799 return s->control_pid;
3800 }
3801
3802 static bool service_needs_console(Unit *u) {
3803 Service *s = SERVICE(u);
3804
3805 assert(s);
3806
3807 /* We provide our own implementation of this here, instead of relying of the generic implementation
3808 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
3809
3810 if (!exec_context_may_touch_console(&s->exec_context))
3811 return false;
3812
3813 return IN_SET(s->state,
3814 SERVICE_START_PRE,
3815 SERVICE_START,
3816 SERVICE_START_POST,
3817 SERVICE_RUNNING,
3818 SERVICE_RELOAD,
3819 SERVICE_STOP,
3820 SERVICE_STOP_SIGABRT,
3821 SERVICE_STOP_SIGTERM,
3822 SERVICE_STOP_SIGKILL,
3823 SERVICE_STOP_POST,
3824 SERVICE_FINAL_SIGTERM,
3825 SERVICE_FINAL_SIGKILL);
3826 }
3827
3828 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3829 [SERVICE_RESTART_NO] = "no",
3830 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3831 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3832 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3833 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3834 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3835 [SERVICE_RESTART_ALWAYS] = "always",
3836 };
3837
3838 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3839
3840 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3841 [SERVICE_SIMPLE] = "simple",
3842 [SERVICE_FORKING] = "forking",
3843 [SERVICE_ONESHOT] = "oneshot",
3844 [SERVICE_DBUS] = "dbus",
3845 [SERVICE_NOTIFY] = "notify",
3846 [SERVICE_IDLE] = "idle"
3847 };
3848
3849 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3850
3851 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3852 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3853 [SERVICE_EXEC_START] = "ExecStart",
3854 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3855 [SERVICE_EXEC_RELOAD] = "ExecReload",
3856 [SERVICE_EXEC_STOP] = "ExecStop",
3857 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3858 };
3859
3860 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3861
3862 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3863 [NOTIFY_UNKNOWN] = "unknown",
3864 [NOTIFY_READY] = "ready",
3865 [NOTIFY_RELOADING] = "reloading",
3866 [NOTIFY_STOPPING] = "stopping",
3867 };
3868
3869 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3870
3871 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3872 [SERVICE_SUCCESS] = "success",
3873 [SERVICE_FAILURE_RESOURCES] = "resources",
3874 [SERVICE_FAILURE_PROTOCOL] = "protocol",
3875 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3876 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3877 [SERVICE_FAILURE_SIGNAL] = "signal",
3878 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3879 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3880 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3881 };
3882
3883 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3884
3885 const UnitVTable service_vtable = {
3886 .object_size = sizeof(Service),
3887 .exec_context_offset = offsetof(Service, exec_context),
3888 .cgroup_context_offset = offsetof(Service, cgroup_context),
3889 .kill_context_offset = offsetof(Service, kill_context),
3890 .exec_runtime_offset = offsetof(Service, exec_runtime),
3891 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3892
3893 .sections =
3894 "Unit\0"
3895 "Service\0"
3896 "Install\0",
3897 .private_section = "Service",
3898
3899 .can_transient = true,
3900 .can_delegate = true,
3901
3902 .init = service_init,
3903 .done = service_done,
3904 .load = service_load,
3905 .release_resources = service_release_resources,
3906
3907 .coldplug = service_coldplug,
3908
3909 .dump = service_dump,
3910
3911 .start = service_start,
3912 .stop = service_stop,
3913 .reload = service_reload,
3914
3915 .can_reload = service_can_reload,
3916
3917 .kill = service_kill,
3918
3919 .serialize = service_serialize,
3920 .deserialize_item = service_deserialize_item,
3921
3922 .active_state = service_active_state,
3923 .sub_state_to_string = service_sub_state_to_string,
3924
3925 .will_restart = service_will_restart,
3926
3927 .may_gc = service_may_gc,
3928
3929 .sigchld_event = service_sigchld_event,
3930
3931 .reset_failed = service_reset_failed,
3932
3933 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3934 .notify_message = service_notify_message,
3935
3936 .main_pid = service_main_pid,
3937 .control_pid = service_control_pid,
3938
3939 .bus_name_owner_change = service_bus_name_owner_change,
3940
3941 .bus_vtable = bus_service_vtable,
3942 .bus_set_property = bus_service_set_property,
3943 .bus_commit_properties = bus_service_commit_properties,
3944
3945 .get_timeout = service_get_timeout,
3946 .needs_console = service_needs_console,
3947
3948 .status_message_formats = {
3949 .starting_stopping = {
3950 [0] = "Starting %s...",
3951 [1] = "Stopping %s...",
3952 },
3953 .finished_start_job = {
3954 [JOB_DONE] = "Started %s.",
3955 [JOB_FAILED] = "Failed to start %s.",
3956 },
3957 .finished_stop_job = {
3958 [JOB_DONE] = "Stopped %s.",
3959 [JOB_FAILED] = "Stopped (with error) %s.",
3960 },
3961 },
3962 };
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