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