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Merge pull request #5842 from keszybz/meson-status-and-conditionals
[thirdparty/systemd.git] / src / core / service.c
1 /***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18 ***/
19
20 #include <errno.h>
21 #include <signal.h>
22 #include <unistd.h>
23
24 #include "alloc-util.h"
25 #include "async.h"
26 #include "bus-error.h"
27 #include "bus-kernel.h"
28 #include "bus-util.h"
29 #include "dbus-service.h"
30 #include "def.h"
31 #include "env-util.h"
32 #include "escape.h"
33 #include "exit-status.h"
34 #include "fd-util.h"
35 #include "fileio.h"
36 #include "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 "stdio-util.h"
49 #include "string-table.h"
50 #include "string-util.h"
51 #include "strv.h"
52 #include "unit-name.h"
53 #include "unit.h"
54 #include "utf8.h"
55 #include "util.h"
56
57 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
58 [SERVICE_DEAD] = UNIT_INACTIVE,
59 [SERVICE_START_PRE] = UNIT_ACTIVATING,
60 [SERVICE_START] = UNIT_ACTIVATING,
61 [SERVICE_START_POST] = UNIT_ACTIVATING,
62 [SERVICE_RUNNING] = UNIT_ACTIVE,
63 [SERVICE_EXITED] = UNIT_ACTIVE,
64 [SERVICE_RELOAD] = UNIT_RELOADING,
65 [SERVICE_STOP] = UNIT_DEACTIVATING,
66 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
67 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
68 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
69 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
70 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
71 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
72 [SERVICE_FAILED] = UNIT_FAILED,
73 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
74 };
75
76 /* For Type=idle we never want to delay any other jobs, hence we
77 * consider idle jobs active as soon as we start working on them */
78 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
79 [SERVICE_DEAD] = UNIT_INACTIVE,
80 [SERVICE_START_PRE] = UNIT_ACTIVE,
81 [SERVICE_START] = UNIT_ACTIVE,
82 [SERVICE_START_POST] = UNIT_ACTIVE,
83 [SERVICE_RUNNING] = UNIT_ACTIVE,
84 [SERVICE_EXITED] = UNIT_ACTIVE,
85 [SERVICE_RELOAD] = UNIT_RELOADING,
86 [SERVICE_STOP] = UNIT_DEACTIVATING,
87 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
88 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
89 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
90 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
91 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
92 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
93 [SERVICE_FAILED] = UNIT_FAILED,
94 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
95 };
96
97 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
98 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
99 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
100
101 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
102 static void service_enter_reload_by_notify(Service *s);
103
104 static void service_init(Unit *u) {
105 Service *s = SERVICE(u);
106
107 assert(u);
108 assert(u->load_state == UNIT_STUB);
109
110 s->timeout_start_usec = u->manager->default_timeout_start_usec;
111 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
112 s->restart_usec = u->manager->default_restart_usec;
113 s->runtime_max_usec = USEC_INFINITY;
114 s->type = _SERVICE_TYPE_INVALID;
115 s->socket_fd = -1;
116 s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
117 s->guess_main_pid = true;
118
119 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
120 }
121
122 static void service_unwatch_control_pid(Service *s) {
123 assert(s);
124
125 if (s->control_pid <= 0)
126 return;
127
128 unit_unwatch_pid(UNIT(s), s->control_pid);
129 s->control_pid = 0;
130 }
131
132 static void service_unwatch_main_pid(Service *s) {
133 assert(s);
134
135 if (s->main_pid <= 0)
136 return;
137
138 unit_unwatch_pid(UNIT(s), s->main_pid);
139 s->main_pid = 0;
140 }
141
142 static void service_unwatch_pid_file(Service *s) {
143 if (!s->pid_file_pathspec)
144 return;
145
146 log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path);
147 path_spec_unwatch(s->pid_file_pathspec);
148 path_spec_done(s->pid_file_pathspec);
149 s->pid_file_pathspec = mfree(s->pid_file_pathspec);
150 }
151
152 static int service_set_main_pid(Service *s, pid_t pid) {
153 pid_t ppid;
154
155 assert(s);
156
157 if (pid <= 1)
158 return -EINVAL;
159
160 if (pid == getpid())
161 return -EINVAL;
162
163 if (s->main_pid == pid && s->main_pid_known)
164 return 0;
165
166 if (s->main_pid != pid) {
167 service_unwatch_main_pid(s);
168 exec_status_start(&s->main_exec_status, pid);
169 }
170
171 s->main_pid = pid;
172 s->main_pid_known = true;
173
174 if (get_process_ppid(pid, &ppid) >= 0 && ppid != getpid()) {
175 log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid);
176 s->main_pid_alien = true;
177 } else
178 s->main_pid_alien = false;
179
180 return 0;
181 }
182
183 void service_close_socket_fd(Service *s) {
184 assert(s);
185
186 /* Undo the effect of service_set_socket_fd(). */
187
188 s->socket_fd = asynchronous_close(s->socket_fd);
189
190 if (UNIT_ISSET(s->accept_socket)) {
191 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
192 unit_ref_unset(&s->accept_socket);
193 }
194 }
195
196 static void service_stop_watchdog(Service *s) {
197 assert(s);
198
199 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
200 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
201 }
202
203 static usec_t service_get_watchdog_usec(Service *s) {
204 assert(s);
205
206 if (s->watchdog_override_enable)
207 return s->watchdog_override_usec;
208 else
209 return s->watchdog_usec;
210 }
211
212 static void service_start_watchdog(Service *s) {
213 int r;
214 usec_t watchdog_usec;
215
216 assert(s);
217
218 watchdog_usec = service_get_watchdog_usec(s);
219 if (watchdog_usec == 0 || watchdog_usec == USEC_INFINITY)
220 return;
221
222 if (s->watchdog_event_source) {
223 r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, watchdog_usec));
224 if (r < 0) {
225 log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m");
226 return;
227 }
228
229 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
230 } else {
231 r = sd_event_add_time(
232 UNIT(s)->manager->event,
233 &s->watchdog_event_source,
234 CLOCK_MONOTONIC,
235 usec_add(s->watchdog_timestamp.monotonic, watchdog_usec), 0,
236 service_dispatch_watchdog, s);
237 if (r < 0) {
238 log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m");
239 return;
240 }
241
242 (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog");
243
244 /* Let's process everything else which might be a sign
245 * of living before we consider a service died. */
246 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
247 }
248
249 if (r < 0)
250 log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m");
251 }
252
253 static void service_reset_watchdog(Service *s) {
254 assert(s);
255
256 dual_timestamp_get(&s->watchdog_timestamp);
257 service_start_watchdog(s);
258 }
259
260 static void service_reset_watchdog_timeout(Service *s, usec_t watchdog_override_usec) {
261 assert(s);
262
263 s->watchdog_override_enable = true;
264 s->watchdog_override_usec = watchdog_override_usec;
265 service_reset_watchdog(s);
266
267 log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec);
268 log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec);
269 }
270
271 static void service_fd_store_unlink(ServiceFDStore *fs) {
272
273 if (!fs)
274 return;
275
276 if (fs->service) {
277 assert(fs->service->n_fd_store > 0);
278 LIST_REMOVE(fd_store, fs->service->fd_store, fs);
279 fs->service->n_fd_store--;
280 }
281
282 if (fs->event_source) {
283 sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
284 sd_event_source_unref(fs->event_source);
285 }
286
287 free(fs->fdname);
288 safe_close(fs->fd);
289 free(fs);
290 }
291
292 static void service_release_fd_store(Service *s) {
293 assert(s);
294
295 log_unit_debug(UNIT(s), "Releasing all stored fds");
296 while (s->fd_store)
297 service_fd_store_unlink(s->fd_store);
298
299 assert(s->n_fd_store == 0);
300 }
301
302 static void service_release_resources(Unit *u, bool inactive) {
303 Service *s = SERVICE(u);
304
305 assert(s);
306
307 if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0)
308 return;
309
310 log_unit_debug(u, "Releasing resources.");
311
312 s->stdin_fd = safe_close(s->stdin_fd);
313 s->stdout_fd = safe_close(s->stdout_fd);
314 s->stderr_fd = safe_close(s->stderr_fd);
315
316 if (inactive)
317 service_release_fd_store(s);
318 }
319
320 static void service_done(Unit *u) {
321 Service *s = SERVICE(u);
322
323 assert(s);
324
325 s->pid_file = mfree(s->pid_file);
326 s->status_text = mfree(s->status_text);
327
328 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
329 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
330 s->control_command = NULL;
331 s->main_command = NULL;
332
333 dynamic_creds_unref(&s->dynamic_creds);
334
335 exit_status_set_free(&s->restart_prevent_status);
336 exit_status_set_free(&s->restart_force_status);
337 exit_status_set_free(&s->success_status);
338
339 /* This will leak a process, but at least no memory or any of
340 * our resources */
341 service_unwatch_main_pid(s);
342 service_unwatch_control_pid(s);
343 service_unwatch_pid_file(s);
344
345 if (s->bus_name) {
346 unit_unwatch_bus_name(u, s->bus_name);
347 s->bus_name = mfree(s->bus_name);
348 }
349
350 s->bus_name_owner = mfree(s->bus_name_owner);
351
352 service_close_socket_fd(s);
353 s->peer = socket_peer_unref(s->peer);
354
355 unit_ref_unset(&s->accept_socket);
356
357 service_stop_watchdog(s);
358
359 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
360
361 service_release_resources(u, true);
362 }
363
364 static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
365 ServiceFDStore *fs = userdata;
366
367 assert(e);
368 assert(fs);
369
370 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
371 log_unit_debug(UNIT(fs->service),
372 "Received %s on stored fd %d (%s), closing.",
373 revents & EPOLLERR ? "EPOLLERR" : "EPOLLHUP",
374 fs->fd, strna(fs->fdname));
375 service_fd_store_unlink(fs);
376 return 0;
377 }
378
379 static int service_add_fd_store(Service *s, int fd, const char *name) {
380 ServiceFDStore *fs;
381 int r;
382
383 /* fd is always consumed if we return >= 0 */
384
385 assert(s);
386 assert(fd >= 0);
387
388 if (s->n_fd_store >= s->n_fd_store_max)
389 return -EXFULL; /* Our store is full.
390 * Use this errno rather than E[NM]FILE to distinguish from
391 * the case where systemd itself hits the file limit. */
392
393 LIST_FOREACH(fd_store, fs, s->fd_store) {
394 r = same_fd(fs->fd, fd);
395 if (r < 0)
396 return r;
397 if (r > 0) {
398 safe_close(fd);
399 return 0; /* fd already included */
400 }
401 }
402
403 fs = new0(ServiceFDStore, 1);
404 if (!fs)
405 return -ENOMEM;
406
407 fs->fd = fd;
408 fs->service = s;
409 fs->fdname = strdup(name ?: "stored");
410 if (!fs->fdname) {
411 free(fs);
412 return -ENOMEM;
413 }
414
415 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
416 if (r < 0) {
417 free(fs->fdname);
418 free(fs);
419 return r;
420 }
421
422 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
423
424 LIST_PREPEND(fd_store, s->fd_store, fs);
425 s->n_fd_store++;
426
427 return 1; /* fd newly stored */
428 }
429
430 static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
431 int r;
432
433 assert(s);
434
435 while (fdset_size(fds) > 0) {
436 _cleanup_close_ int fd = -1;
437
438 fd = fdset_steal_first(fds);
439 if (fd < 0)
440 break;
441
442 r = service_add_fd_store(s, fd, name);
443 if (r == -EXFULL)
444 return log_unit_warning_errno(UNIT(s), r,
445 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
446 s->n_fd_store_max);
447 if (r < 0)
448 return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m");
449 if (r > 0)
450 log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name));
451 fd = -1;
452 }
453
454 return 0;
455 }
456
457 static int service_arm_timer(Service *s, usec_t usec) {
458 int r;
459
460 assert(s);
461
462 if (s->timer_event_source) {
463 r = sd_event_source_set_time(s->timer_event_source, usec);
464 if (r < 0)
465 return r;
466
467 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
468 }
469
470 if (usec == USEC_INFINITY)
471 return 0;
472
473 r = sd_event_add_time(
474 UNIT(s)->manager->event,
475 &s->timer_event_source,
476 CLOCK_MONOTONIC,
477 usec, 0,
478 service_dispatch_timer, s);
479 if (r < 0)
480 return r;
481
482 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
483
484 return 0;
485 }
486
487 static int service_verify(Service *s) {
488 assert(s);
489
490 if (UNIT(s)->load_state != UNIT_LOADED)
491 return 0;
492
493 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
494 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
495 return -EINVAL;
496 }
497
498 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
499 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
500 return -EINVAL;
501 }
502
503 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
504 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
505 return -EINVAL;
506 }
507
508 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
509 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
510 return -EINVAL;
511 }
512
513 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
514 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
515 return -EINVAL;
516 }
517
518 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
519 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
520 return -EINVAL;
521 }
522
523 if (s->type == SERVICE_DBUS && !s->bus_name) {
524 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
525 return -EINVAL;
526 }
527
528 if (s->bus_name && s->type != SERVICE_DBUS)
529 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
530
531 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
532 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
533 return -EINVAL;
534 }
535
536 if (s->usb_function_descriptors && !s->usb_function_strings)
537 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
538
539 if (!s->usb_function_descriptors && s->usb_function_strings)
540 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
541
542 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
543 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
544
545 return 0;
546 }
547
548 static int service_add_default_dependencies(Service *s) {
549 int r;
550
551 assert(s);
552
553 if (!UNIT(s)->default_dependencies)
554 return 0;
555
556 /* Add a number of automatic dependencies useful for the
557 * majority of services. */
558
559 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
560 /* First, pull in the really early boot stuff, and
561 * require it, so that we fail if we can't acquire
562 * it. */
563
564 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
565 if (r < 0)
566 return r;
567 } else {
568
569 /* In the --user instance there's no sysinit.target,
570 * in that case require basic.target instead. */
571
572 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
573 if (r < 0)
574 return r;
575 }
576
577 /* Second, if the rest of the base system is in the same
578 * transaction, order us after it, but do not pull it in or
579 * even require it. */
580 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
581 if (r < 0)
582 return r;
583
584 /* Third, add us in for normal shutdown. */
585 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
586 }
587
588 static void service_fix_output(Service *s) {
589 assert(s);
590
591 /* If nothing has been explicitly configured, patch default
592 * output in. If input is socket/tty we avoid this however,
593 * since in that case we want output to default to the same
594 * place as we read input from. */
595
596 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
597 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
598 s->exec_context.std_input == EXEC_INPUT_NULL)
599 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
600
601 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
602 s->exec_context.std_input == EXEC_INPUT_NULL)
603 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
604 }
605
606 static int service_setup_bus_name(Service *s) {
607 int r;
608
609 assert(s);
610
611 if (!s->bus_name)
612 return 0;
613
614 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
615 if (r < 0)
616 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
617
618 /* Regardless if kdbus is used or not, we always want to be ordered against dbus.socket if both are in the transaction. */
619 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
620 if (r < 0)
621 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
622
623 r = unit_watch_bus_name(UNIT(s), s->bus_name);
624 if (r == -EEXIST)
625 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
626 if (r < 0)
627 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
628
629 return 0;
630 }
631
632 static int service_add_extras(Service *s) {
633 int r;
634
635 assert(s);
636
637 if (s->type == _SERVICE_TYPE_INVALID) {
638 /* Figure out a type automatically */
639 if (s->bus_name)
640 s->type = SERVICE_DBUS;
641 else if (s->exec_command[SERVICE_EXEC_START])
642 s->type = SERVICE_SIMPLE;
643 else
644 s->type = SERVICE_ONESHOT;
645 }
646
647 /* Oneshot services have disabled start timeout by default */
648 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
649 s->timeout_start_usec = USEC_INFINITY;
650
651 service_fix_output(s);
652
653 r = unit_patch_contexts(UNIT(s));
654 if (r < 0)
655 return r;
656
657 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
658 if (r < 0)
659 return r;
660
661 r = unit_set_default_slice(UNIT(s));
662 if (r < 0)
663 return r;
664
665 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
666 s->notify_access = NOTIFY_MAIN;
667
668 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
669 s->notify_access = NOTIFY_MAIN;
670
671 r = service_add_default_dependencies(s);
672 if (r < 0)
673 return r;
674
675 r = service_setup_bus_name(s);
676 if (r < 0)
677 return r;
678
679 return 0;
680 }
681
682 static int service_load(Unit *u) {
683 Service *s = SERVICE(u);
684 int r;
685
686 assert(s);
687
688 /* Load a .service file */
689 r = unit_load_fragment(u);
690 if (r < 0)
691 return r;
692
693 /* Still nothing found? Then let's give up */
694 if (u->load_state == UNIT_STUB)
695 return -ENOENT;
696
697 /* This is a new unit? Then let's add in some extras */
698 if (u->load_state == UNIT_LOADED) {
699
700 /* We were able to load something, then let's add in
701 * the dropin directories. */
702 r = unit_load_dropin(u);
703 if (r < 0)
704 return r;
705
706 /* This is a new unit? Then let's add in some
707 * extras */
708 r = service_add_extras(s);
709 if (r < 0)
710 return r;
711 }
712
713 return service_verify(s);
714 }
715
716 static void service_dump(Unit *u, FILE *f, const char *prefix) {
717 ServiceExecCommand c;
718 Service *s = SERVICE(u);
719 const char *prefix2;
720
721 assert(s);
722
723 prefix = strempty(prefix);
724 prefix2 = strjoina(prefix, "\t");
725
726 fprintf(f,
727 "%sService State: %s\n"
728 "%sResult: %s\n"
729 "%sReload Result: %s\n"
730 "%sPermissionsStartOnly: %s\n"
731 "%sRootDirectoryStartOnly: %s\n"
732 "%sRemainAfterExit: %s\n"
733 "%sGuessMainPID: %s\n"
734 "%sType: %s\n"
735 "%sRestart: %s\n"
736 "%sNotifyAccess: %s\n"
737 "%sNotifyState: %s\n",
738 prefix, service_state_to_string(s->state),
739 prefix, service_result_to_string(s->result),
740 prefix, service_result_to_string(s->reload_result),
741 prefix, yes_no(s->permissions_start_only),
742 prefix, yes_no(s->root_directory_start_only),
743 prefix, yes_no(s->remain_after_exit),
744 prefix, yes_no(s->guess_main_pid),
745 prefix, service_type_to_string(s->type),
746 prefix, service_restart_to_string(s->restart),
747 prefix, notify_access_to_string(s->notify_access),
748 prefix, notify_state_to_string(s->notify_state));
749
750 if (s->control_pid > 0)
751 fprintf(f,
752 "%sControl PID: "PID_FMT"\n",
753 prefix, s->control_pid);
754
755 if (s->main_pid > 0)
756 fprintf(f,
757 "%sMain PID: "PID_FMT"\n"
758 "%sMain PID Known: %s\n"
759 "%sMain PID Alien: %s\n",
760 prefix, s->main_pid,
761 prefix, yes_no(s->main_pid_known),
762 prefix, yes_no(s->main_pid_alien));
763
764 if (s->pid_file)
765 fprintf(f,
766 "%sPIDFile: %s\n",
767 prefix, s->pid_file);
768
769 if (s->bus_name)
770 fprintf(f,
771 "%sBusName: %s\n"
772 "%sBus Name Good: %s\n",
773 prefix, s->bus_name,
774 prefix, yes_no(s->bus_name_good));
775
776 if (UNIT_ISSET(s->accept_socket))
777 fprintf(f,
778 "%sAccept Socket: %s\n",
779 prefix, UNIT_DEREF(s->accept_socket)->id);
780
781 kill_context_dump(&s->kill_context, f, prefix);
782 exec_context_dump(&s->exec_context, f, prefix);
783
784 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
785
786 if (!s->exec_command[c])
787 continue;
788
789 fprintf(f, "%s-> %s:\n",
790 prefix, service_exec_command_to_string(c));
791
792 exec_command_dump_list(s->exec_command[c], f, prefix2);
793 }
794
795 if (s->status_text)
796 fprintf(f, "%sStatus Text: %s\n",
797 prefix, s->status_text);
798
799 if (s->n_fd_store_max > 0)
800 fprintf(f,
801 "%sFile Descriptor Store Max: %u\n"
802 "%sFile Descriptor Store Current: %u\n",
803 prefix, s->n_fd_store_max,
804 prefix, s->n_fd_store);
805 }
806
807 static int service_load_pid_file(Service *s, bool may_warn) {
808 _cleanup_free_ char *k = NULL;
809 int r;
810 pid_t pid;
811
812 assert(s);
813
814 if (!s->pid_file)
815 return -ENOENT;
816
817 r = read_one_line_file(s->pid_file, &k);
818 if (r < 0) {
819 if (may_warn)
820 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));
821 return r;
822 }
823
824 r = parse_pid(k, &pid);
825 if (r < 0) {
826 if (may_warn)
827 log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
828 return r;
829 }
830
831 if (!pid_is_alive(pid)) {
832 if (may_warn)
833 log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
834 return -ESRCH;
835 }
836
837 if (s->main_pid_known) {
838 if (pid == s->main_pid)
839 return 0;
840
841 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
842
843 service_unwatch_main_pid(s);
844 s->main_pid_known = false;
845 } else
846 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
847
848 r = service_set_main_pid(s, pid);
849 if (r < 0)
850 return r;
851
852 r = unit_watch_pid(UNIT(s), pid);
853 if (r < 0) /* FIXME: we need to do something here */
854 return log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
855
856 return 0;
857 }
858
859 static void service_search_main_pid(Service *s) {
860 pid_t pid = 0;
861 int r;
862
863 assert(s);
864
865 /* If we know it anyway, don't ever fallback to unreliable
866 * heuristics */
867 if (s->main_pid_known)
868 return;
869
870 if (!s->guess_main_pid)
871 return;
872
873 assert(s->main_pid <= 0);
874
875 if (unit_search_main_pid(UNIT(s), &pid) < 0)
876 return;
877
878 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
879 if (service_set_main_pid(s, pid) < 0)
880 return;
881
882 r = unit_watch_pid(UNIT(s), pid);
883 if (r < 0)
884 /* FIXME: we need to do something here */
885 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
886 }
887
888 static void service_set_state(Service *s, ServiceState state) {
889 ServiceState old_state;
890 const UnitActiveState *table;
891
892 assert(s);
893
894 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
895
896 old_state = s->state;
897 s->state = state;
898
899 service_unwatch_pid_file(s);
900
901 if (!IN_SET(state,
902 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
903 SERVICE_RUNNING,
904 SERVICE_RELOAD,
905 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
906 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
907 SERVICE_AUTO_RESTART))
908 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
909
910 if (!IN_SET(state,
911 SERVICE_START, SERVICE_START_POST,
912 SERVICE_RUNNING, SERVICE_RELOAD,
913 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
914 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
915 service_unwatch_main_pid(s);
916 s->main_command = NULL;
917 }
918
919 if (!IN_SET(state,
920 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
921 SERVICE_RELOAD,
922 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
923 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
924 service_unwatch_control_pid(s);
925 s->control_command = NULL;
926 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
927 }
928
929 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
930 unit_unwatch_all_pids(UNIT(s));
931
932 if (!IN_SET(state,
933 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
934 SERVICE_RUNNING, SERVICE_RELOAD,
935 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
936 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
937 !(state == SERVICE_DEAD && UNIT(s)->job))
938 service_close_socket_fd(s);
939
940 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
941 service_stop_watchdog(s);
942
943 /* For the inactive states unit_notify() will trim the cgroup,
944 * but for exit we have to do that ourselves... */
945 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
946 unit_prune_cgroup(UNIT(s));
947
948 /* For remain_after_exit services, let's see if we can "release" the
949 * hold on the console, since unit_notify() only does that in case of
950 * change of state */
951 if (state == SERVICE_EXITED &&
952 s->remain_after_exit &&
953 UNIT(s)->manager->n_on_console > 0) {
954
955 ExecContext *ec;
956
957 ec = unit_get_exec_context(UNIT(s));
958 if (ec && exec_context_may_touch_console(ec)) {
959 Manager *m = UNIT(s)->manager;
960
961 m->n_on_console--;
962 if (m->n_on_console == 0)
963 /* unset no_console_output flag, since the console is free */
964 m->no_console_output = false;
965 }
966 }
967
968 if (old_state != state)
969 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
970
971 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
972 }
973
974 static usec_t service_coldplug_timeout(Service *s) {
975 assert(s);
976
977 switch (s->deserialized_state) {
978
979 case SERVICE_START_PRE:
980 case SERVICE_START:
981 case SERVICE_START_POST:
982 case SERVICE_RELOAD:
983 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
984
985 case SERVICE_RUNNING:
986 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
987
988 case SERVICE_STOP:
989 case SERVICE_STOP_SIGABRT:
990 case SERVICE_STOP_SIGTERM:
991 case SERVICE_STOP_SIGKILL:
992 case SERVICE_STOP_POST:
993 case SERVICE_FINAL_SIGTERM:
994 case SERVICE_FINAL_SIGKILL:
995 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
996
997 case SERVICE_AUTO_RESTART:
998 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
999
1000 default:
1001 return USEC_INFINITY;
1002 }
1003 }
1004
1005 static int service_coldplug(Unit *u) {
1006 Service *s = SERVICE(u);
1007 int r;
1008
1009 assert(s);
1010 assert(s->state == SERVICE_DEAD);
1011
1012 if (s->deserialized_state == s->state)
1013 return 0;
1014
1015 r = service_arm_timer(s, service_coldplug_timeout(s));
1016 if (r < 0)
1017 return r;
1018
1019 if (s->main_pid > 0 &&
1020 pid_is_unwaited(s->main_pid) &&
1021 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1022 IN_SET(s->deserialized_state,
1023 SERVICE_START, SERVICE_START_POST,
1024 SERVICE_RUNNING, SERVICE_RELOAD,
1025 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1026 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1027 r = unit_watch_pid(UNIT(s), s->main_pid);
1028 if (r < 0)
1029 return r;
1030 }
1031
1032 if (s->control_pid > 0 &&
1033 pid_is_unwaited(s->control_pid) &&
1034 IN_SET(s->deserialized_state,
1035 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1036 SERVICE_RELOAD,
1037 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1038 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1039 r = unit_watch_pid(UNIT(s), s->control_pid);
1040 if (r < 0)
1041 return r;
1042 }
1043
1044 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1045 unit_watch_all_pids(UNIT(s));
1046
1047 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1048 service_start_watchdog(s);
1049
1050 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1051 (void) unit_setup_dynamic_creds(u);
1052
1053 if (UNIT_ISSET(s->accept_socket)) {
1054 Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket));
1055
1056 if (socket->max_connections_per_source > 0) {
1057 SocketPeer *peer;
1058
1059 /* Make a best-effort attempt at bumping the connection count */
1060 if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) {
1061 socket_peer_unref(s->peer);
1062 s->peer = peer;
1063 }
1064 }
1065 }
1066
1067 service_set_state(s, s->deserialized_state);
1068 return 0;
1069 }
1070
1071 static int service_collect_fds(Service *s, int **fds, char ***fd_names) {
1072 _cleanup_strv_free_ char **rfd_names = NULL;
1073 _cleanup_free_ int *rfds = NULL;
1074 int rn_fds = 0, r;
1075
1076 assert(s);
1077 assert(fds);
1078 assert(fd_names);
1079
1080 if (s->socket_fd >= 0) {
1081
1082 /* Pass the per-connection socket */
1083
1084 rfds = new(int, 1);
1085 if (!rfds)
1086 return -ENOMEM;
1087 rfds[0] = s->socket_fd;
1088
1089 rfd_names = strv_new("connection", NULL);
1090 if (!rfd_names)
1091 return -ENOMEM;
1092
1093 rn_fds = 1;
1094 } else {
1095 Iterator i;
1096 Unit *u;
1097
1098 /* Pass all our configured sockets for singleton services */
1099
1100 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1101 _cleanup_free_ int *cfds = NULL;
1102 Socket *sock;
1103 int cn_fds;
1104
1105 if (u->type != UNIT_SOCKET)
1106 continue;
1107
1108 sock = SOCKET(u);
1109
1110 cn_fds = socket_collect_fds(sock, &cfds);
1111 if (cn_fds < 0)
1112 return cn_fds;
1113
1114 if (cn_fds <= 0)
1115 continue;
1116
1117 if (!rfds) {
1118 rfds = cfds;
1119 rn_fds = cn_fds;
1120
1121 cfds = NULL;
1122 } else {
1123 int *t;
1124
1125 t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int));
1126 if (!t)
1127 return -ENOMEM;
1128
1129 memcpy(t + rn_fds, cfds, cn_fds * sizeof(int));
1130
1131 rfds = t;
1132 rn_fds += cn_fds;
1133 }
1134
1135 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1136 if (r < 0)
1137 return r;
1138 }
1139 }
1140
1141 if (s->n_fd_store > 0) {
1142 ServiceFDStore *fs;
1143 char **nl;
1144 int *t;
1145
1146 t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int));
1147 if (!t)
1148 return -ENOMEM;
1149
1150 rfds = t;
1151
1152 nl = realloc(rfd_names, (rn_fds + s->n_fd_store + 1) * sizeof(char*));
1153 if (!nl)
1154 return -ENOMEM;
1155
1156 rfd_names = nl;
1157
1158 LIST_FOREACH(fd_store, fs, s->fd_store) {
1159 rfds[rn_fds] = fs->fd;
1160 rfd_names[rn_fds] = strdup(strempty(fs->fdname));
1161 if (!rfd_names[rn_fds])
1162 return -ENOMEM;
1163
1164 rn_fds++;
1165 }
1166
1167 rfd_names[rn_fds] = NULL;
1168 }
1169
1170 *fds = rfds;
1171 *fd_names = rfd_names;
1172
1173 rfds = NULL;
1174 rfd_names = NULL;
1175
1176 return rn_fds;
1177 }
1178
1179 static bool service_exec_needs_notify_socket(Service *s, ExecFlags flags) {
1180 assert(s);
1181
1182 /* Notifications are accepted depending on the process and
1183 * the access setting of the service:
1184 * process: \ access: NONE MAIN EXEC ALL
1185 * main no yes yes yes
1186 * control no no yes yes
1187 * other (forked) no no no yes */
1188
1189 if (flags & EXEC_IS_CONTROL)
1190 /* A control process */
1191 return IN_SET(s->notify_access, NOTIFY_EXEC, NOTIFY_ALL);
1192
1193 /* We only spawn main processes and control processes, so any
1194 * process that is not a control process is a main process */
1195 return s->notify_access != NOTIFY_NONE;
1196 }
1197
1198 static int service_spawn(
1199 Service *s,
1200 ExecCommand *c,
1201 usec_t timeout,
1202 ExecFlags flags,
1203 pid_t *_pid) {
1204
1205 _cleanup_strv_free_ char **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1206 _cleanup_free_ int *fds = NULL;
1207 unsigned n_fds = 0, n_env = 0;
1208 const char *path;
1209 pid_t pid;
1210
1211 ExecParameters exec_params = {
1212 .flags = flags,
1213 .stdin_fd = -1,
1214 .stdout_fd = -1,
1215 .stderr_fd = -1,
1216 };
1217
1218 int r;
1219
1220 assert(s);
1221 assert(c);
1222 assert(_pid);
1223
1224 if (flags & EXEC_IS_CONTROL) {
1225 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1226 if (s->permissions_start_only)
1227 exec_params.flags &= ~EXEC_APPLY_PERMISSIONS;
1228 if (s->root_directory_start_only)
1229 exec_params.flags &= ~EXEC_APPLY_CHROOT;
1230 }
1231
1232 (void) unit_realize_cgroup(UNIT(s));
1233 if (s->reset_cpu_usage) {
1234 (void) unit_reset_cpu_usage(UNIT(s));
1235 s->reset_cpu_usage = false;
1236 }
1237
1238 r = unit_setup_exec_runtime(UNIT(s));
1239 if (r < 0)
1240 return r;
1241
1242 r = unit_setup_dynamic_creds(UNIT(s));
1243 if (r < 0)
1244 return r;
1245
1246 if ((flags & EXEC_PASS_FDS) ||
1247 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1248 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1249 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1250
1251 r = service_collect_fds(s, &fds, &fd_names);
1252 if (r < 0)
1253 return r;
1254
1255 n_fds = r;
1256 log_unit_debug(UNIT(s), "Passing %i fds to service", n_fds);
1257 }
1258
1259 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1260 if (r < 0)
1261 return r;
1262
1263 our_env = new0(char*, 9);
1264 if (!our_env)
1265 return -ENOMEM;
1266
1267 if (service_exec_needs_notify_socket(s, flags))
1268 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1269 return -ENOMEM;
1270
1271 if (s->main_pid > 0)
1272 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1273 return -ENOMEM;
1274
1275 if (MANAGER_IS_USER(UNIT(s)->manager))
1276 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0)
1277 return -ENOMEM;
1278
1279 if (s->socket_fd >= 0) {
1280 union sockaddr_union sa;
1281 socklen_t salen = sizeof(sa);
1282
1283 r = getpeername(s->socket_fd, &sa.sa, &salen);
1284 if (r < 0) {
1285 r = -errno;
1286
1287 /* ENOTCONN is legitimate if the endpoint disappeared on shutdown.
1288 * This connection is over, but the socket unit lives on. */
1289 if (r != -ENOTCONN || !IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST))
1290 return r;
1291 }
1292
1293 if (r == 0 && IN_SET(sa.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) {
1294 _cleanup_free_ char *addr = NULL;
1295 char *t;
1296 unsigned port;
1297
1298 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1299 if (r < 0)
1300 return r;
1301
1302 t = strappend("REMOTE_ADDR=", addr);
1303 if (!t)
1304 return -ENOMEM;
1305 our_env[n_env++] = t;
1306
1307 r = sockaddr_port(&sa.sa, &port);
1308 if (r < 0)
1309 return r;
1310
1311 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1312 return -ENOMEM;
1313 our_env[n_env++] = t;
1314 }
1315 }
1316
1317 if (flags & EXEC_SETENV_RESULT) {
1318 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1319 return -ENOMEM;
1320
1321 if (s->main_exec_status.pid > 0 &&
1322 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1323 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1324 return -ENOMEM;
1325
1326 if (s->main_exec_status.code == CLD_EXITED)
1327 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1328 else
1329 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1330 if (r < 0)
1331 return -ENOMEM;
1332 }
1333 }
1334
1335 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1336 if (!final_env)
1337 return -ENOMEM;
1338
1339 if ((flags & EXEC_IS_CONTROL) && UNIT(s)->cgroup_path) {
1340 path = strjoina(UNIT(s)->cgroup_path, "/control");
1341 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1342 } else
1343 path = UNIT(s)->cgroup_path;
1344
1345 exec_params.flags |= MANAGER_IS_SYSTEM(UNIT(s)->manager) ? EXEC_NEW_KEYRING : 0;
1346 exec_params.argv = c->argv;
1347 exec_params.environment = final_env;
1348 exec_params.fds = fds;
1349 exec_params.fd_names = fd_names;
1350 exec_params.n_fds = n_fds;
1351 exec_params.confirm_spawn = manager_get_confirm_spawn(UNIT(s)->manager);
1352 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1353 exec_params.cgroup_path = path;
1354 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1355 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1356 exec_params.watchdog_usec = s->watchdog_usec;
1357 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1358 if (s->type == SERVICE_IDLE)
1359 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1360 exec_params.stdin_fd = s->stdin_fd;
1361 exec_params.stdout_fd = s->stdout_fd;
1362 exec_params.stderr_fd = s->stderr_fd;
1363
1364 r = exec_spawn(UNIT(s),
1365 c,
1366 &s->exec_context,
1367 &exec_params,
1368 s->exec_runtime,
1369 &s->dynamic_creds,
1370 &pid);
1371 if (r < 0)
1372 return r;
1373
1374 r = unit_watch_pid(UNIT(s), pid);
1375 if (r < 0) /* FIXME: we need to do something here */
1376 return r;
1377
1378 *_pid = pid;
1379
1380 return 0;
1381 }
1382
1383 static int main_pid_good(Service *s) {
1384 assert(s);
1385
1386 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1387 * don't know */
1388
1389 /* If we know the pid file, then let's just check if it is
1390 * still valid */
1391 if (s->main_pid_known) {
1392
1393 /* If it's an alien child let's check if it is still
1394 * alive ... */
1395 if (s->main_pid_alien && s->main_pid > 0)
1396 return pid_is_alive(s->main_pid);
1397
1398 /* .. otherwise assume we'll get a SIGCHLD for it,
1399 * which we really should wait for to collect exit
1400 * status and code */
1401 return s->main_pid > 0;
1402 }
1403
1404 /* We don't know the pid */
1405 return -EAGAIN;
1406 }
1407
1408 _pure_ static int control_pid_good(Service *s) {
1409 assert(s);
1410
1411 return s->control_pid > 0;
1412 }
1413
1414 static int cgroup_good(Service *s) {
1415 int r;
1416
1417 assert(s);
1418
1419 if (!UNIT(s)->cgroup_path)
1420 return 0;
1421
1422 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1423 if (r < 0)
1424 return r;
1425
1426 return !r;
1427 }
1428
1429 static bool service_shall_restart(Service *s) {
1430 assert(s);
1431
1432 /* Don't restart after manual stops */
1433 if (s->forbid_restart)
1434 return false;
1435
1436 /* Never restart if this is configured as special exception */
1437 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1438 return false;
1439
1440 /* Restart if the exit code/status are configured as restart triggers */
1441 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1442 return true;
1443
1444 switch (s->restart) {
1445
1446 case SERVICE_RESTART_NO:
1447 return false;
1448
1449 case SERVICE_RESTART_ALWAYS:
1450 return true;
1451
1452 case SERVICE_RESTART_ON_SUCCESS:
1453 return s->result == SERVICE_SUCCESS;
1454
1455 case SERVICE_RESTART_ON_FAILURE:
1456 return s->result != SERVICE_SUCCESS;
1457
1458 case SERVICE_RESTART_ON_ABNORMAL:
1459 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1460
1461 case SERVICE_RESTART_ON_WATCHDOG:
1462 return s->result == SERVICE_FAILURE_WATCHDOG;
1463
1464 case SERVICE_RESTART_ON_ABORT:
1465 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1466
1467 default:
1468 assert_not_reached("unknown restart setting");
1469 }
1470 }
1471
1472 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1473 int r;
1474 assert(s);
1475
1476 if (s->result == SERVICE_SUCCESS)
1477 s->result = f;
1478
1479 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1480
1481 if (s->result != SERVICE_SUCCESS) {
1482 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1483 emergency_action(UNIT(s)->manager, s->emergency_action, UNIT(s)->reboot_arg, "service failed");
1484 }
1485
1486 if (allow_restart && service_shall_restart(s)) {
1487
1488 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1489 if (r < 0)
1490 goto fail;
1491
1492 service_set_state(s, SERVICE_AUTO_RESTART);
1493 }
1494
1495 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1496 s->forbid_restart = false;
1497
1498 /* We want fresh tmpdirs in case service is started again immediately */
1499 exec_runtime_destroy(s->exec_runtime);
1500 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1501
1502 /* Also, remove the runtime directory */
1503 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1504
1505 /* Get rid of the IPC bits of the user */
1506 unit_unref_uid_gid(UNIT(s), true);
1507
1508 /* Release the user, and destroy it if we are the only remaining owner */
1509 dynamic_creds_destroy(&s->dynamic_creds);
1510
1511 /* Try to delete the pid file. At this point it will be
1512 * out-of-date, and some software might be confused by it, so
1513 * let's remove it. */
1514 if (s->pid_file)
1515 (void) unlink(s->pid_file);
1516
1517 return;
1518
1519 fail:
1520 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1521 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1522 }
1523
1524 static void service_enter_stop_post(Service *s, ServiceResult f) {
1525 int r;
1526 assert(s);
1527
1528 if (s->result == SERVICE_SUCCESS)
1529 s->result = f;
1530
1531 service_unwatch_control_pid(s);
1532 unit_watch_all_pids(UNIT(s));
1533
1534 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1535 if (s->control_command) {
1536 s->control_command_id = SERVICE_EXEC_STOP_POST;
1537
1538 r = service_spawn(s,
1539 s->control_command,
1540 s->timeout_stop_usec,
1541 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1542 &s->control_pid);
1543 if (r < 0)
1544 goto fail;
1545
1546 service_set_state(s, SERVICE_STOP_POST);
1547 } else
1548 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1549
1550 return;
1551
1552 fail:
1553 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1554 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1555 }
1556
1557 static int state_to_kill_operation(ServiceState state) {
1558 switch (state) {
1559
1560 case SERVICE_STOP_SIGABRT:
1561 return KILL_ABORT;
1562
1563 case SERVICE_STOP_SIGTERM:
1564 case SERVICE_FINAL_SIGTERM:
1565 return KILL_TERMINATE;
1566
1567 case SERVICE_STOP_SIGKILL:
1568 case SERVICE_FINAL_SIGKILL:
1569 return KILL_KILL;
1570
1571 default:
1572 return _KILL_OPERATION_INVALID;
1573 }
1574 }
1575
1576 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1577 int r;
1578
1579 assert(s);
1580
1581 if (s->result == SERVICE_SUCCESS)
1582 s->result = f;
1583
1584 unit_watch_all_pids(UNIT(s));
1585
1586 r = unit_kill_context(
1587 UNIT(s),
1588 &s->kill_context,
1589 state_to_kill_operation(state),
1590 s->main_pid,
1591 s->control_pid,
1592 s->main_pid_alien);
1593
1594 if (r < 0)
1595 goto fail;
1596
1597 if (r > 0) {
1598 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1599 if (r < 0)
1600 goto fail;
1601
1602 service_set_state(s, state);
1603 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1604 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1605 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1606 service_enter_stop_post(s, SERVICE_SUCCESS);
1607 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1608 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1609 else
1610 service_enter_dead(s, SERVICE_SUCCESS, true);
1611
1612 return;
1613
1614 fail:
1615 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1616
1617 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1618 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1619 else
1620 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1621 }
1622
1623 static void service_enter_stop_by_notify(Service *s) {
1624 assert(s);
1625
1626 unit_watch_all_pids(UNIT(s));
1627
1628 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1629
1630 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1631 service_set_state(s, SERVICE_STOP_SIGTERM);
1632 }
1633
1634 static void service_enter_stop(Service *s, ServiceResult f) {
1635 int r;
1636
1637 assert(s);
1638
1639 if (s->result == SERVICE_SUCCESS)
1640 s->result = f;
1641
1642 service_unwatch_control_pid(s);
1643 unit_watch_all_pids(UNIT(s));
1644
1645 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1646 if (s->control_command) {
1647 s->control_command_id = SERVICE_EXEC_STOP;
1648
1649 r = service_spawn(s,
1650 s->control_command,
1651 s->timeout_stop_usec,
1652 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1653 &s->control_pid);
1654 if (r < 0)
1655 goto fail;
1656
1657 service_set_state(s, SERVICE_STOP);
1658 } else
1659 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1660
1661 return;
1662
1663 fail:
1664 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1665 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1666 }
1667
1668 static bool service_good(Service *s) {
1669 int main_pid_ok;
1670 assert(s);
1671
1672 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1673 return false;
1674
1675 main_pid_ok = main_pid_good(s);
1676 if (main_pid_ok > 0) /* It's alive */
1677 return true;
1678 if (main_pid_ok == 0) /* It's dead */
1679 return false;
1680
1681 /* OK, we don't know anything about the main PID, maybe
1682 * because there is none. Let's check the control group
1683 * instead. */
1684
1685 return cgroup_good(s) != 0;
1686 }
1687
1688 static void service_enter_running(Service *s, ServiceResult f) {
1689 assert(s);
1690
1691 if (s->result == SERVICE_SUCCESS)
1692 s->result = f;
1693
1694 service_unwatch_control_pid(s);
1695
1696 if (service_good(s)) {
1697
1698 /* If there are any queued up sd_notify()
1699 * notifications, process them now */
1700 if (s->notify_state == NOTIFY_RELOADING)
1701 service_enter_reload_by_notify(s);
1702 else if (s->notify_state == NOTIFY_STOPPING)
1703 service_enter_stop_by_notify(s);
1704 else {
1705 service_set_state(s, SERVICE_RUNNING);
1706 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1707 }
1708
1709 } else if (f != SERVICE_SUCCESS)
1710 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
1711 else if (s->remain_after_exit)
1712 service_set_state(s, SERVICE_EXITED);
1713 else
1714 service_enter_stop(s, SERVICE_SUCCESS);
1715 }
1716
1717 static void service_enter_start_post(Service *s) {
1718 int r;
1719 assert(s);
1720
1721 service_unwatch_control_pid(s);
1722 service_reset_watchdog(s);
1723
1724 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1725 if (s->control_command) {
1726 s->control_command_id = SERVICE_EXEC_START_POST;
1727
1728 r = service_spawn(s,
1729 s->control_command,
1730 s->timeout_start_usec,
1731 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1732 &s->control_pid);
1733 if (r < 0)
1734 goto fail;
1735
1736 service_set_state(s, SERVICE_START_POST);
1737 } else
1738 service_enter_running(s, SERVICE_SUCCESS);
1739
1740 return;
1741
1742 fail:
1743 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1744 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1745 }
1746
1747 static void service_kill_control_processes(Service *s) {
1748 char *p;
1749
1750 if (!UNIT(s)->cgroup_path)
1751 return;
1752
1753 p = strjoina(UNIT(s)->cgroup_path, "/control");
1754 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, NULL);
1755 }
1756
1757 static void service_enter_start(Service *s) {
1758 ExecCommand *c;
1759 usec_t timeout;
1760 pid_t pid;
1761 int r;
1762
1763 assert(s);
1764
1765 service_unwatch_control_pid(s);
1766 service_unwatch_main_pid(s);
1767
1768 /* We want to ensure that nobody leaks processes from
1769 * START_PRE here, so let's go on a killing spree, People
1770 * should not spawn long running processes from START_PRE. */
1771 service_kill_control_processes(s);
1772
1773 if (s->type == SERVICE_FORKING) {
1774 s->control_command_id = SERVICE_EXEC_START;
1775 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1776
1777 s->main_command = NULL;
1778 } else {
1779 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1780 s->control_command = NULL;
1781
1782 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1783 }
1784
1785 if (!c) {
1786 if (s->type != SERVICE_ONESHOT) {
1787 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1788 * happen if the configuration changes at runtime. In this case, let's enter a failure
1789 * state. */
1790 log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m");
1791 r = -ENXIO;
1792 goto fail;
1793 }
1794
1795 service_enter_start_post(s);
1796 return;
1797 }
1798
1799 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1800 /* For simple + idle this is the main process. We don't apply any timeout here, but
1801 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1802 timeout = USEC_INFINITY;
1803 else
1804 timeout = s->timeout_start_usec;
1805
1806 r = service_spawn(s,
1807 c,
1808 timeout,
1809 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1810 &pid);
1811 if (r < 0)
1812 goto fail;
1813
1814 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1815 /* For simple services we immediately start
1816 * the START_POST binaries. */
1817
1818 service_set_main_pid(s, pid);
1819 service_enter_start_post(s);
1820
1821 } else if (s->type == SERVICE_FORKING) {
1822
1823 /* For forking services we wait until the start
1824 * process exited. */
1825
1826 s->control_pid = pid;
1827 service_set_state(s, SERVICE_START);
1828
1829 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1830
1831 /* For oneshot services we wait until the start
1832 * process exited, too, but it is our main process. */
1833
1834 /* For D-Bus services we know the main pid right away,
1835 * but wait for the bus name to appear on the
1836 * bus. Notify services are similar. */
1837
1838 service_set_main_pid(s, pid);
1839 service_set_state(s, SERVICE_START);
1840 } else
1841 assert_not_reached("Unknown service type");
1842
1843 return;
1844
1845 fail:
1846 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1847 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1848 }
1849
1850 static void service_enter_start_pre(Service *s) {
1851 int r;
1852
1853 assert(s);
1854
1855 service_unwatch_control_pid(s);
1856
1857 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1858 if (s->control_command) {
1859 /* Before we start anything, let's clear up what might
1860 * be left from previous runs. */
1861 service_kill_control_processes(s);
1862
1863 s->control_command_id = SERVICE_EXEC_START_PRE;
1864
1865 r = service_spawn(s,
1866 s->control_command,
1867 s->timeout_start_usec,
1868 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1869 &s->control_pid);
1870 if (r < 0)
1871 goto fail;
1872
1873 service_set_state(s, SERVICE_START_PRE);
1874 } else
1875 service_enter_start(s);
1876
1877 return;
1878
1879 fail:
1880 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1881 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1882 }
1883
1884 static void service_enter_restart(Service *s) {
1885 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1886 int r;
1887
1888 assert(s);
1889
1890 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1891 /* Don't restart things if we are going down anyway */
1892 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1893
1894 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1895 if (r < 0)
1896 goto fail;
1897
1898 return;
1899 }
1900
1901 /* Any units that are bound to this service must also be
1902 * restarted. We use JOB_RESTART (instead of the more obvious
1903 * JOB_START) here so that those dependency jobs will be added
1904 * as well. */
1905 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1906 if (r < 0)
1907 goto fail;
1908
1909 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1910 * it will be canceled as part of the service_stop() call that
1911 * is executed as part of JOB_RESTART. */
1912
1913 log_unit_debug(UNIT(s), "Scheduled restart job.");
1914 return;
1915
1916 fail:
1917 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
1918 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1919 }
1920
1921 static void service_enter_reload_by_notify(Service *s) {
1922 assert(s);
1923
1924 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
1925 service_set_state(s, SERVICE_RELOAD);
1926 }
1927
1928 static void service_enter_reload(Service *s) {
1929 int r;
1930
1931 assert(s);
1932
1933 service_unwatch_control_pid(s);
1934 s->reload_result = SERVICE_SUCCESS;
1935
1936 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1937 if (s->control_command) {
1938 s->control_command_id = SERVICE_EXEC_RELOAD;
1939
1940 r = service_spawn(s,
1941 s->control_command,
1942 s->timeout_start_usec,
1943 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1944 &s->control_pid);
1945 if (r < 0)
1946 goto fail;
1947
1948 service_set_state(s, SERVICE_RELOAD);
1949 } else
1950 service_enter_running(s, SERVICE_SUCCESS);
1951
1952 return;
1953
1954 fail:
1955 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
1956 s->reload_result = SERVICE_FAILURE_RESOURCES;
1957 service_enter_running(s, SERVICE_SUCCESS);
1958 }
1959
1960 static void service_run_next_control(Service *s) {
1961 usec_t timeout;
1962 int r;
1963
1964 assert(s);
1965 assert(s->control_command);
1966 assert(s->control_command->command_next);
1967
1968 assert(s->control_command_id != SERVICE_EXEC_START);
1969
1970 s->control_command = s->control_command->command_next;
1971 service_unwatch_control_pid(s);
1972
1973 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1974 timeout = s->timeout_start_usec;
1975 else
1976 timeout = s->timeout_stop_usec;
1977
1978 r = service_spawn(s,
1979 s->control_command,
1980 timeout,
1981 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
1982 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
1983 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
1984 &s->control_pid);
1985 if (r < 0)
1986 goto fail;
1987
1988 return;
1989
1990 fail:
1991 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
1992
1993 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_STOP))
1994 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1995 else if (s->state == SERVICE_STOP_POST)
1996 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1997 else if (s->state == SERVICE_RELOAD) {
1998 s->reload_result = SERVICE_FAILURE_RESOURCES;
1999 service_enter_running(s, SERVICE_SUCCESS);
2000 } else
2001 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2002 }
2003
2004 static void service_run_next_main(Service *s) {
2005 pid_t pid;
2006 int r;
2007
2008 assert(s);
2009 assert(s->main_command);
2010 assert(s->main_command->command_next);
2011 assert(s->type == SERVICE_ONESHOT);
2012
2013 s->main_command = s->main_command->command_next;
2014 service_unwatch_main_pid(s);
2015
2016 r = service_spawn(s,
2017 s->main_command,
2018 s->timeout_start_usec,
2019 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
2020 &pid);
2021 if (r < 0)
2022 goto fail;
2023
2024 service_set_main_pid(s, pid);
2025
2026 return;
2027
2028 fail:
2029 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
2030 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2031 }
2032
2033 static int service_start(Unit *u) {
2034 Service *s = SERVICE(u);
2035 int r;
2036
2037 assert(s);
2038
2039 /* We cannot fulfill this request right now, try again later
2040 * please! */
2041 if (IN_SET(s->state,
2042 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2043 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2044 return -EAGAIN;
2045
2046 /* Already on it! */
2047 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2048 return 0;
2049
2050 /* A service that will be restarted must be stopped first to
2051 * trigger BindsTo and/or OnFailure dependencies. If a user
2052 * does not want to wait for the holdoff time to elapse, the
2053 * service should be manually restarted, not started. We
2054 * simply return EAGAIN here, so that any start jobs stay
2055 * queued, and assume that the auto restart timer will
2056 * eventually trigger the restart. */
2057 if (s->state == SERVICE_AUTO_RESTART)
2058 return -EAGAIN;
2059
2060 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2061
2062 /* Make sure we don't enter a busy loop of some kind. */
2063 r = unit_start_limit_test(u);
2064 if (r < 0) {
2065 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2066 return r;
2067 }
2068
2069 r = unit_acquire_invocation_id(u);
2070 if (r < 0)
2071 return r;
2072
2073 s->result = SERVICE_SUCCESS;
2074 s->reload_result = SERVICE_SUCCESS;
2075 s->main_pid_known = false;
2076 s->main_pid_alien = false;
2077 s->forbid_restart = false;
2078 s->reset_cpu_usage = true;
2079
2080 s->status_text = mfree(s->status_text);
2081 s->status_errno = 0;
2082
2083 s->notify_state = NOTIFY_UNKNOWN;
2084
2085 s->watchdog_override_enable = false;
2086 s->watchdog_override_usec = 0;
2087
2088 service_enter_start_pre(s);
2089 return 1;
2090 }
2091
2092 static int service_stop(Unit *u) {
2093 Service *s = SERVICE(u);
2094
2095 assert(s);
2096
2097 /* Don't create restart jobs from manual stops. */
2098 s->forbid_restart = true;
2099
2100 /* Already on it */
2101 if (IN_SET(s->state,
2102 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2103 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2104 return 0;
2105
2106 /* A restart will be scheduled or is in progress. */
2107 if (s->state == SERVICE_AUTO_RESTART) {
2108 service_set_state(s, SERVICE_DEAD);
2109 return 0;
2110 }
2111
2112 /* If there's already something running we go directly into
2113 * kill mode. */
2114 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2115 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2116 return 0;
2117 }
2118
2119 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2120
2121 service_enter_stop(s, SERVICE_SUCCESS);
2122 return 1;
2123 }
2124
2125 static int service_reload(Unit *u) {
2126 Service *s = SERVICE(u);
2127
2128 assert(s);
2129
2130 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2131
2132 service_enter_reload(s);
2133 return 1;
2134 }
2135
2136 _pure_ static bool service_can_reload(Unit *u) {
2137 Service *s = SERVICE(u);
2138
2139 assert(s);
2140
2141 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2142 }
2143
2144 static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) {
2145 Service *s = SERVICE(u);
2146 unsigned idx = 0;
2147 ExecCommand *first, *c;
2148
2149 assert(s);
2150
2151 first = s->exec_command[id];
2152
2153 /* Figure out where we are in the list by walking back to the beginning */
2154 for (c = current; c != first; c = c->command_prev)
2155 idx++;
2156
2157 return idx;
2158 }
2159
2160 static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) {
2161 Service *s = SERVICE(u);
2162 ServiceExecCommand id;
2163 unsigned idx;
2164 const char *type;
2165 char **arg;
2166 _cleanup_free_ char *args = NULL, *p = NULL;
2167 size_t allocated = 0, length = 0;
2168
2169 assert(s);
2170 assert(f);
2171
2172 if (!command)
2173 return 0;
2174
2175 if (command == s->control_command) {
2176 type = "control";
2177 id = s->control_command_id;
2178 } else {
2179 type = "main";
2180 id = SERVICE_EXEC_START;
2181 }
2182
2183 idx = service_exec_command_index(u, id, command);
2184
2185 STRV_FOREACH(arg, command->argv) {
2186 size_t n;
2187 _cleanup_free_ char *e = NULL;
2188
2189 e = xescape(*arg, WHITESPACE);
2190 if (!e)
2191 return -ENOMEM;
2192
2193 n = strlen(e);
2194 if (!GREEDY_REALLOC(args, allocated, length + 1 + n + 1))
2195 return -ENOMEM;
2196
2197 if (length > 0)
2198 args[length++] = ' ';
2199
2200 memcpy(args + length, e, n);
2201 length += n;
2202 }
2203
2204 if (!GREEDY_REALLOC(args, allocated, length + 1))
2205 return -ENOMEM;
2206 args[length++] = 0;
2207
2208 p = xescape(command->path, WHITESPACE);
2209 if (!p)
2210 return -ENOMEM;
2211
2212 fprintf(f, "%s-command=%s %u %s %s\n", type, service_exec_command_to_string(id), idx, p, args);
2213
2214 return 0;
2215 }
2216
2217 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2218 Service *s = SERVICE(u);
2219 ServiceFDStore *fs;
2220 int r;
2221
2222 assert(u);
2223 assert(f);
2224 assert(fds);
2225
2226 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2227 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2228 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2229
2230 if (s->control_pid > 0)
2231 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2232
2233 if (s->main_pid_known && s->main_pid > 0)
2234 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2235
2236 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2237 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2238 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2239
2240 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2241 if (r < 0)
2242 return r;
2243
2244 service_serialize_exec_command(u, f, s->control_command);
2245 service_serialize_exec_command(u, f, s->main_command);
2246
2247 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2248 if (r < 0)
2249 return r;
2250 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2251 if (r < 0)
2252 return r;
2253 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2254 if (r < 0)
2255 return r;
2256
2257 if (UNIT_ISSET(s->accept_socket)) {
2258 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2259 if (r < 0)
2260 return r;
2261 }
2262
2263 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2264 if (r < 0)
2265 return r;
2266
2267 LIST_FOREACH(fd_store, fs, s->fd_store) {
2268 _cleanup_free_ char *c = NULL;
2269 int copy;
2270
2271 copy = fdset_put_dup(fds, fs->fd);
2272 if (copy < 0)
2273 return copy;
2274
2275 c = cescape(fs->fdname);
2276
2277 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2278 }
2279
2280 if (s->main_exec_status.pid > 0) {
2281 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2282 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2283 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2284
2285 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2286 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2287 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2288 }
2289 }
2290
2291 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2292
2293 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2294
2295 if (s->watchdog_override_enable)
2296 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2297
2298 return 0;
2299 }
2300
2301 static int service_deserialize_exec_command(Unit *u, const char *key, const char *value) {
2302 Service *s = SERVICE(u);
2303 int r;
2304 unsigned idx = 0, i;
2305 bool control, found = false;
2306 ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID;
2307 ExecCommand *command = NULL;
2308 _cleanup_free_ char *path = NULL;
2309 _cleanup_strv_free_ char **argv = NULL;
2310
2311 enum ExecCommandState {
2312 STATE_EXEC_COMMAND_TYPE,
2313 STATE_EXEC_COMMAND_INDEX,
2314 STATE_EXEC_COMMAND_PATH,
2315 STATE_EXEC_COMMAND_ARGS,
2316 _STATE_EXEC_COMMAND_MAX,
2317 _STATE_EXEC_COMMAND_INVALID = -1,
2318 } state;
2319
2320 assert(s);
2321 assert(key);
2322 assert(value);
2323
2324 control = streq(key, "control-command");
2325
2326 state = STATE_EXEC_COMMAND_TYPE;
2327
2328 for (;;) {
2329 _cleanup_free_ char *arg = NULL;
2330
2331 r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE);
2332 if (r == 0)
2333 break;
2334 else if (r < 0)
2335 return r;
2336
2337 switch (state) {
2338 case STATE_EXEC_COMMAND_TYPE:
2339 id = service_exec_command_from_string(arg);
2340 if (id < 0)
2341 return -EINVAL;
2342
2343 state = STATE_EXEC_COMMAND_INDEX;
2344 break;
2345 case STATE_EXEC_COMMAND_INDEX:
2346 r = safe_atou(arg, &idx);
2347 if (r < 0)
2348 return -EINVAL;
2349
2350 state = STATE_EXEC_COMMAND_PATH;
2351 break;
2352 case STATE_EXEC_COMMAND_PATH:
2353 path = arg;
2354 arg = NULL;
2355 state = STATE_EXEC_COMMAND_ARGS;
2356
2357 if (!path_is_absolute(path))
2358 return -EINVAL;
2359 break;
2360 case STATE_EXEC_COMMAND_ARGS:
2361 r = strv_extend(&argv, arg);
2362 if (r < 0)
2363 return -ENOMEM;
2364 break;
2365 default:
2366 assert_not_reached("Unknown error at deserialization of exec command");
2367 break;
2368 }
2369 }
2370
2371 if (state != STATE_EXEC_COMMAND_ARGS)
2372 return -EINVAL;
2373
2374 /* Let's check whether exec command on given offset matches data that we just deserialized */
2375 for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) {
2376 if (i != idx)
2377 continue;
2378
2379 found = strv_equal(argv, command->argv) && streq(command->path, path);
2380 break;
2381 }
2382
2383 if (!found) {
2384 /* Command at the index we serialized is different, let's look for command that exactly
2385 * matches but is on different index. If there is no such command we will not resume execution. */
2386 for (command = s->exec_command[id]; command; command = command->command_next)
2387 if (strv_equal(command->argv, argv) && streq(command->path, path))
2388 break;
2389 }
2390
2391 if (command && control)
2392 s->control_command = command;
2393 else if (command)
2394 s->main_command = command;
2395 else
2396 log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2397
2398 return 0;
2399 }
2400
2401 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2402 Service *s = SERVICE(u);
2403 int r;
2404
2405 assert(u);
2406 assert(key);
2407 assert(value);
2408 assert(fds);
2409
2410 if (streq(key, "state")) {
2411 ServiceState state;
2412
2413 state = service_state_from_string(value);
2414 if (state < 0)
2415 log_unit_debug(u, "Failed to parse state value: %s", value);
2416 else
2417 s->deserialized_state = state;
2418 } else if (streq(key, "result")) {
2419 ServiceResult f;
2420
2421 f = service_result_from_string(value);
2422 if (f < 0)
2423 log_unit_debug(u, "Failed to parse result value: %s", value);
2424 else if (f != SERVICE_SUCCESS)
2425 s->result = f;
2426
2427 } else if (streq(key, "reload-result")) {
2428 ServiceResult f;
2429
2430 f = service_result_from_string(value);
2431 if (f < 0)
2432 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2433 else if (f != SERVICE_SUCCESS)
2434 s->reload_result = f;
2435
2436 } else if (streq(key, "control-pid")) {
2437 pid_t pid;
2438
2439 if (parse_pid(value, &pid) < 0)
2440 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2441 else
2442 s->control_pid = pid;
2443 } else if (streq(key, "main-pid")) {
2444 pid_t pid;
2445
2446 if (parse_pid(value, &pid) < 0)
2447 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2448 else {
2449 service_set_main_pid(s, pid);
2450 unit_watch_pid(UNIT(s), pid);
2451 }
2452 } else if (streq(key, "main-pid-known")) {
2453 int b;
2454
2455 b = parse_boolean(value);
2456 if (b < 0)
2457 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2458 else
2459 s->main_pid_known = b;
2460 } else if (streq(key, "bus-name-good")) {
2461 int b;
2462
2463 b = parse_boolean(value);
2464 if (b < 0)
2465 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2466 else
2467 s->bus_name_good = b;
2468 } else if (streq(key, "bus-name-owner")) {
2469 r = free_and_strdup(&s->bus_name_owner, value);
2470 if (r < 0)
2471 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2472 } else if (streq(key, "status-text")) {
2473 char *t;
2474
2475 r = cunescape(value, 0, &t);
2476 if (r < 0)
2477 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2478 else {
2479 free(s->status_text);
2480 s->status_text = t;
2481 }
2482
2483 } else if (streq(key, "accept-socket")) {
2484 Unit *socket;
2485
2486 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2487 if (r < 0)
2488 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2489 else {
2490 unit_ref_set(&s->accept_socket, socket);
2491 SOCKET(socket)->n_connections++;
2492 }
2493
2494 } else if (streq(key, "socket-fd")) {
2495 int fd;
2496
2497 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2498 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2499 else {
2500 asynchronous_close(s->socket_fd);
2501 s->socket_fd = fdset_remove(fds, fd);
2502 }
2503 } else if (streq(key, "fd-store-fd")) {
2504 const char *fdv;
2505 size_t pf;
2506 int fd;
2507
2508 pf = strcspn(value, WHITESPACE);
2509 fdv = strndupa(value, pf);
2510
2511 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2512 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2513 else {
2514 _cleanup_free_ char *t = NULL;
2515 const char *fdn;
2516
2517 fdn = value + pf;
2518 fdn += strspn(fdn, WHITESPACE);
2519 (void) cunescape(fdn, 0, &t);
2520
2521 r = service_add_fd_store(s, fd, t);
2522 if (r < 0)
2523 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2524 else
2525 fdset_remove(fds, fd);
2526 }
2527
2528 } else if (streq(key, "main-exec-status-pid")) {
2529 pid_t pid;
2530
2531 if (parse_pid(value, &pid) < 0)
2532 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2533 else
2534 s->main_exec_status.pid = pid;
2535 } else if (streq(key, "main-exec-status-code")) {
2536 int i;
2537
2538 if (safe_atoi(value, &i) < 0)
2539 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2540 else
2541 s->main_exec_status.code = i;
2542 } else if (streq(key, "main-exec-status-status")) {
2543 int i;
2544
2545 if (safe_atoi(value, &i) < 0)
2546 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2547 else
2548 s->main_exec_status.status = i;
2549 } else if (streq(key, "main-exec-status-start"))
2550 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2551 else if (streq(key, "main-exec-status-exit"))
2552 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2553 else if (streq(key, "watchdog-timestamp"))
2554 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2555 else if (streq(key, "forbid-restart")) {
2556 int b;
2557
2558 b = parse_boolean(value);
2559 if (b < 0)
2560 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2561 else
2562 s->forbid_restart = b;
2563 } else if (streq(key, "stdin-fd")) {
2564 int fd;
2565
2566 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2567 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2568 else {
2569 asynchronous_close(s->stdin_fd);
2570 s->stdin_fd = fdset_remove(fds, fd);
2571 s->exec_context.stdio_as_fds = true;
2572 }
2573 } else if (streq(key, "stdout-fd")) {
2574 int fd;
2575
2576 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2577 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2578 else {
2579 asynchronous_close(s->stdout_fd);
2580 s->stdout_fd = fdset_remove(fds, fd);
2581 s->exec_context.stdio_as_fds = true;
2582 }
2583 } else if (streq(key, "stderr-fd")) {
2584 int fd;
2585
2586 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2587 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2588 else {
2589 asynchronous_close(s->stderr_fd);
2590 s->stderr_fd = fdset_remove(fds, fd);
2591 s->exec_context.stdio_as_fds = true;
2592 }
2593 } else if (streq(key, "watchdog-override-usec")) {
2594 usec_t watchdog_override_usec;
2595 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2596 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2597 else {
2598 s->watchdog_override_enable = true;
2599 s->watchdog_override_usec = watchdog_override_usec;
2600 }
2601 } else if (STR_IN_SET(key, "main-command", "control-command")) {
2602 r = service_deserialize_exec_command(u, key, value);
2603 if (r < 0)
2604 log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value);
2605 } else
2606 log_unit_debug(u, "Unknown serialization key: %s", key);
2607
2608 return 0;
2609 }
2610
2611 _pure_ static UnitActiveState service_active_state(Unit *u) {
2612 const UnitActiveState *table;
2613
2614 assert(u);
2615
2616 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2617
2618 return table[SERVICE(u)->state];
2619 }
2620
2621 static const char *service_sub_state_to_string(Unit *u) {
2622 assert(u);
2623
2624 return service_state_to_string(SERVICE(u)->state);
2625 }
2626
2627 static bool service_check_gc(Unit *u) {
2628 Service *s = SERVICE(u);
2629
2630 assert(s);
2631
2632 /* Never clean up services that still have a process around,
2633 * even if the service is formally dead. */
2634 if (cgroup_good(s) > 0 ||
2635 main_pid_good(s) > 0 ||
2636 control_pid_good(s) > 0)
2637 return true;
2638
2639 return false;
2640 }
2641
2642 static int service_retry_pid_file(Service *s) {
2643 int r;
2644
2645 assert(s->pid_file);
2646 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2647
2648 r = service_load_pid_file(s, false);
2649 if (r < 0)
2650 return r;
2651
2652 service_unwatch_pid_file(s);
2653
2654 service_enter_running(s, SERVICE_SUCCESS);
2655 return 0;
2656 }
2657
2658 static int service_watch_pid_file(Service *s) {
2659 int r;
2660
2661 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2662
2663 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2664 if (r < 0)
2665 goto fail;
2666
2667 /* the pidfile might have appeared just before we set the watch */
2668 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2669 service_retry_pid_file(s);
2670
2671 return 0;
2672 fail:
2673 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2674 service_unwatch_pid_file(s);
2675 return r;
2676 }
2677
2678 static int service_demand_pid_file(Service *s) {
2679 PathSpec *ps;
2680
2681 assert(s->pid_file);
2682 assert(!s->pid_file_pathspec);
2683
2684 ps = new0(PathSpec, 1);
2685 if (!ps)
2686 return -ENOMEM;
2687
2688 ps->unit = UNIT(s);
2689 ps->path = strdup(s->pid_file);
2690 if (!ps->path) {
2691 free(ps);
2692 return -ENOMEM;
2693 }
2694
2695 path_kill_slashes(ps->path);
2696
2697 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2698 * keep their PID file open all the time. */
2699 ps->type = PATH_MODIFIED;
2700 ps->inotify_fd = -1;
2701
2702 s->pid_file_pathspec = ps;
2703
2704 return service_watch_pid_file(s);
2705 }
2706
2707 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2708 PathSpec *p = userdata;
2709 Service *s;
2710
2711 assert(p);
2712
2713 s = SERVICE(p->unit);
2714
2715 assert(s);
2716 assert(fd >= 0);
2717 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2718 assert(s->pid_file_pathspec);
2719 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2720
2721 log_unit_debug(UNIT(s), "inotify event");
2722
2723 if (path_spec_fd_event(p, events) < 0)
2724 goto fail;
2725
2726 if (service_retry_pid_file(s) == 0)
2727 return 0;
2728
2729 if (service_watch_pid_file(s) < 0)
2730 goto fail;
2731
2732 return 0;
2733
2734 fail:
2735 service_unwatch_pid_file(s);
2736 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2737 return 0;
2738 }
2739
2740 static void service_notify_cgroup_empty_event(Unit *u) {
2741 Service *s = SERVICE(u);
2742
2743 assert(u);
2744
2745 log_unit_debug(u, "cgroup is empty");
2746
2747 switch (s->state) {
2748
2749 /* Waiting for SIGCHLD is usually more interesting,
2750 * because it includes return codes/signals. Which is
2751 * why we ignore the cgroup events for most cases,
2752 * except when we don't know pid which to expect the
2753 * SIGCHLD for. */
2754
2755 case SERVICE_START:
2756 if (s->type == SERVICE_NOTIFY) {
2757 /* No chance of getting a ready notification anymore */
2758 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2759 break;
2760 }
2761
2762 /* Fall through */
2763
2764 case SERVICE_START_POST:
2765 if (s->pid_file_pathspec) {
2766 /* Give up hoping for the daemon to write its PID file */
2767 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2768
2769 service_unwatch_pid_file(s);
2770 if (s->state == SERVICE_START)
2771 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2772 else
2773 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
2774 }
2775 break;
2776
2777 case SERVICE_RUNNING:
2778 /* service_enter_running() will figure out what to do */
2779 service_enter_running(s, SERVICE_SUCCESS);
2780 break;
2781
2782 case SERVICE_STOP_SIGABRT:
2783 case SERVICE_STOP_SIGTERM:
2784 case SERVICE_STOP_SIGKILL:
2785
2786 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2787 service_enter_stop_post(s, SERVICE_SUCCESS);
2788
2789 break;
2790
2791 case SERVICE_STOP_POST:
2792 case SERVICE_FINAL_SIGTERM:
2793 case SERVICE_FINAL_SIGKILL:
2794 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2795 service_enter_dead(s, SERVICE_SUCCESS, true);
2796
2797 break;
2798
2799 default:
2800 ;
2801 }
2802 }
2803
2804 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2805 Service *s = SERVICE(u);
2806 ServiceResult f;
2807
2808 assert(s);
2809 assert(pid >= 0);
2810
2811 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
2812 f = SERVICE_SUCCESS;
2813 else if (code == CLD_EXITED)
2814 f = SERVICE_FAILURE_EXIT_CODE;
2815 else if (code == CLD_KILLED)
2816 f = SERVICE_FAILURE_SIGNAL;
2817 else if (code == CLD_DUMPED)
2818 f = SERVICE_FAILURE_CORE_DUMP;
2819 else
2820 assert_not_reached("Unknown code");
2821
2822 if (s->main_pid == pid) {
2823 /* Forking services may occasionally move to a new PID.
2824 * As long as they update the PID file before exiting the old
2825 * PID, they're fine. */
2826 if (service_load_pid_file(s, false) == 0)
2827 return;
2828
2829 s->main_pid = 0;
2830 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2831
2832 if (s->main_command) {
2833 /* If this is not a forking service than the
2834 * main process got started and hence we copy
2835 * the exit status so that it is recorded both
2836 * as main and as control process exit
2837 * status */
2838
2839 s->main_command->exec_status = s->main_exec_status;
2840
2841 if (s->main_command->ignore)
2842 f = SERVICE_SUCCESS;
2843 } else if (s->exec_command[SERVICE_EXEC_START]) {
2844
2845 /* If this is a forked process, then we should
2846 * ignore the return value if this was
2847 * configured for the starter process */
2848
2849 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2850 f = SERVICE_SUCCESS;
2851 }
2852
2853 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
2854 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
2855 * that the service already logged the reason at a higher log level on its own. However, if the service
2856 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
2857 * our log level to WARNING then. */
2858
2859 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
2860 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
2861 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2862 sigchld_code_to_string(code), status,
2863 strna(code == CLD_EXITED
2864 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2865 : signal_to_string(status))),
2866 "EXIT_CODE=%s", sigchld_code_to_string(code),
2867 "EXIT_STATUS=%i", status,
2868 LOG_UNIT_ID(u),
2869 NULL);
2870
2871 if (s->result == SERVICE_SUCCESS)
2872 s->result = f;
2873
2874 if (s->main_command &&
2875 s->main_command->command_next &&
2876 f == SERVICE_SUCCESS) {
2877
2878 /* There is another command to *
2879 * execute, so let's do that. */
2880
2881 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2882 service_run_next_main(s);
2883
2884 } else {
2885
2886 /* The service exited, so the service is officially
2887 * gone. */
2888 s->main_command = NULL;
2889
2890 switch (s->state) {
2891
2892 case SERVICE_START_POST:
2893 case SERVICE_RELOAD:
2894 case SERVICE_STOP:
2895 /* Need to wait until the operation is
2896 * done */
2897 break;
2898
2899 case SERVICE_START:
2900 if (s->type == SERVICE_ONESHOT) {
2901 /* This was our main goal, so let's go on */
2902 if (f == SERVICE_SUCCESS)
2903 service_enter_start_post(s);
2904 else
2905 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2906 break;
2907 } else if (s->type == SERVICE_NOTIFY) {
2908 /* Only enter running through a notification, so that the
2909 * SERVICE_START state signifies that no ready notification
2910 * has been received */
2911 if (f != SERVICE_SUCCESS)
2912 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2913 else if (!s->remain_after_exit)
2914 /* The service has never been active */
2915 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
2916 break;
2917 }
2918
2919 /* Fall through */
2920
2921 case SERVICE_RUNNING:
2922 service_enter_running(s, f);
2923 break;
2924
2925 case SERVICE_STOP_SIGABRT:
2926 case SERVICE_STOP_SIGTERM:
2927 case SERVICE_STOP_SIGKILL:
2928
2929 if (!control_pid_good(s))
2930 service_enter_stop_post(s, f);
2931
2932 /* If there is still a control process, wait for that first */
2933 break;
2934
2935 case SERVICE_STOP_POST:
2936 case SERVICE_FINAL_SIGTERM:
2937 case SERVICE_FINAL_SIGKILL:
2938
2939 if (!control_pid_good(s))
2940 service_enter_dead(s, f, true);
2941 break;
2942
2943 default:
2944 assert_not_reached("Uh, main process died at wrong time.");
2945 }
2946 }
2947
2948 } else if (s->control_pid == pid) {
2949 s->control_pid = 0;
2950
2951 if (s->control_command) {
2952 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2953
2954 if (s->control_command->ignore)
2955 f = SERVICE_SUCCESS;
2956 }
2957
2958 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
2959 "Control process exited, code=%s status=%i",
2960 sigchld_code_to_string(code), status);
2961
2962 if (s->result == SERVICE_SUCCESS)
2963 s->result = f;
2964
2965 /* Immediately get rid of the cgroup, so that the
2966 * kernel doesn't delay the cgroup empty messages for
2967 * the service cgroup any longer than necessary */
2968 service_kill_control_processes(s);
2969
2970 if (s->control_command &&
2971 s->control_command->command_next &&
2972 f == SERVICE_SUCCESS) {
2973
2974 /* There is another command to *
2975 * execute, so let's do that. */
2976
2977 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
2978 service_run_next_control(s);
2979
2980 } else {
2981 /* No further commands for this step, so let's
2982 * figure out what to do next */
2983
2984 s->control_command = NULL;
2985 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2986
2987 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
2988
2989 switch (s->state) {
2990
2991 case SERVICE_START_PRE:
2992 if (f == SERVICE_SUCCESS)
2993 service_enter_start(s);
2994 else
2995 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2996 break;
2997
2998 case SERVICE_START:
2999 if (s->type != SERVICE_FORKING)
3000 /* Maybe spurious event due to a reload that changed the type? */
3001 break;
3002
3003 if (f != SERVICE_SUCCESS) {
3004 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3005 break;
3006 }
3007
3008 if (s->pid_file) {
3009 bool has_start_post;
3010 int r;
3011
3012 /* Let's try to load the pid file here if we can.
3013 * The PID file might actually be created by a START_POST
3014 * script. In that case don't worry if the loading fails. */
3015
3016 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3017 r = service_load_pid_file(s, !has_start_post);
3018 if (!has_start_post && r < 0) {
3019 r = service_demand_pid_file(s);
3020 if (r < 0 || !cgroup_good(s))
3021 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3022 break;
3023 }
3024 } else
3025 service_search_main_pid(s);
3026
3027 service_enter_start_post(s);
3028 break;
3029
3030 case SERVICE_START_POST:
3031 if (f != SERVICE_SUCCESS) {
3032 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3033 break;
3034 }
3035
3036 if (s->pid_file) {
3037 int r;
3038
3039 r = service_load_pid_file(s, true);
3040 if (r < 0) {
3041 r = service_demand_pid_file(s);
3042 if (r < 0 || !cgroup_good(s))
3043 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
3044 break;
3045 }
3046 } else
3047 service_search_main_pid(s);
3048
3049 service_enter_running(s, SERVICE_SUCCESS);
3050 break;
3051
3052 case SERVICE_RELOAD:
3053 if (f == SERVICE_SUCCESS)
3054 if (service_load_pid_file(s, true) < 0)
3055 service_search_main_pid(s);
3056
3057 s->reload_result = f;
3058 service_enter_running(s, SERVICE_SUCCESS);
3059 break;
3060
3061 case SERVICE_STOP:
3062 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3063 break;
3064
3065 case SERVICE_STOP_SIGABRT:
3066 case SERVICE_STOP_SIGTERM:
3067 case SERVICE_STOP_SIGKILL:
3068 if (main_pid_good(s) <= 0)
3069 service_enter_stop_post(s, f);
3070
3071 /* If there is still a service
3072 * process around, wait until
3073 * that one quit, too */
3074 break;
3075
3076 case SERVICE_STOP_POST:
3077 case SERVICE_FINAL_SIGTERM:
3078 case SERVICE_FINAL_SIGKILL:
3079 if (main_pid_good(s) <= 0)
3080 service_enter_dead(s, f, true);
3081 break;
3082
3083 default:
3084 assert_not_reached("Uh, control process died at wrong time.");
3085 }
3086 }
3087 }
3088
3089 /* Notify clients about changed exit status */
3090 unit_add_to_dbus_queue(u);
3091
3092 /* We got one SIGCHLD for the service, let's watch all
3093 * processes that are now running of the service, and watch
3094 * that. Among the PIDs we then watch will be children
3095 * reassigned to us, which hopefully allows us to identify
3096 * when all children are gone */
3097 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3098 unit_watch_all_pids(u);
3099
3100 /* If the PID set is empty now, then let's finish this off
3101 (On unified we use proper notifications) */
3102 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) == 0 && set_isempty(u->pids))
3103 service_notify_cgroup_empty_event(u);
3104 }
3105
3106 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3107 Service *s = SERVICE(userdata);
3108
3109 assert(s);
3110 assert(source == s->timer_event_source);
3111
3112 switch (s->state) {
3113
3114 case SERVICE_START_PRE:
3115 case SERVICE_START:
3116 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
3117 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3118 break;
3119
3120 case SERVICE_START_POST:
3121 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
3122 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3123 break;
3124
3125 case SERVICE_RUNNING:
3126 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
3127 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3128 break;
3129
3130 case SERVICE_RELOAD:
3131 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
3132 service_kill_control_processes(s);
3133 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3134 service_enter_running(s, SERVICE_SUCCESS);
3135 break;
3136
3137 case SERVICE_STOP:
3138 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
3139 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3140 break;
3141
3142 case SERVICE_STOP_SIGABRT:
3143 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
3144 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3145 break;
3146
3147 case SERVICE_STOP_SIGTERM:
3148 if (s->kill_context.send_sigkill) {
3149 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
3150 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3151 } else {
3152 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3153 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3154 }
3155
3156 break;
3157
3158 case SERVICE_STOP_SIGKILL:
3159 /* Uh, we sent a SIGKILL and it is still not gone?
3160 * Must be something we cannot kill, so let's just be
3161 * weirded out and continue */
3162
3163 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
3164 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3165 break;
3166
3167 case SERVICE_STOP_POST:
3168 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
3169 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3170 break;
3171
3172 case SERVICE_FINAL_SIGTERM:
3173 if (s->kill_context.send_sigkill) {
3174 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
3175 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3176 } else {
3177 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3178 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3179 }
3180
3181 break;
3182
3183 case SERVICE_FINAL_SIGKILL:
3184 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
3185 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3186 break;
3187
3188 case SERVICE_AUTO_RESTART:
3189 log_unit_info(UNIT(s),
3190 s->restart_usec > 0 ?
3191 "Service hold-off time over, scheduling restart." :
3192 "Service has no hold-off time, scheduling restart.");
3193 service_enter_restart(s);
3194 break;
3195
3196 default:
3197 assert_not_reached("Timeout at wrong time.");
3198 }
3199
3200 return 0;
3201 }
3202
3203 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3204 Service *s = SERVICE(userdata);
3205 char t[FORMAT_TIMESPAN_MAX];
3206 usec_t watchdog_usec;
3207
3208 assert(s);
3209 assert(source == s->watchdog_event_source);
3210
3211 watchdog_usec = service_get_watchdog_usec(s);
3212
3213 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3214 format_timespan(t, sizeof(t), watchdog_usec, 1));
3215
3216 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3217
3218 return 0;
3219 }
3220
3221 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
3222 Service *s = SERVICE(u);
3223 _cleanup_free_ char *cc = NULL;
3224 bool notify_dbus = false;
3225 const char *e;
3226
3227 assert(u);
3228
3229 cc = strv_join(tags, ", ");
3230
3231 if (s->notify_access == NOTIFY_NONE) {
3232 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3233 return;
3234 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3235 if (s->main_pid != 0)
3236 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3237 else
3238 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3239 return;
3240 } else if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) {
3241 if (s->main_pid != 0 && s->control_pid != 0)
3242 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,
3243 pid, s->main_pid, s->control_pid);
3244 else if (s->main_pid != 0)
3245 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3246 else if (s->control_pid != 0)
3247 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid);
3248 else
3249 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);
3250 return;
3251 } else
3252 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3253
3254 /* Interpret MAINPID= */
3255 e = strv_find_startswith(tags, "MAINPID=");
3256 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3257 if (parse_pid(e, &pid) < 0)
3258 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3259 else if (pid == s->control_pid)
3260 log_unit_warning(u, "A control process cannot also be the main process");
3261 else if (pid == getpid() || pid == 1)
3262 log_unit_warning(u, "Service manager can't be main process, ignoring sd_notify() MAINPID= field");
3263 else {
3264 service_set_main_pid(s, pid);
3265 unit_watch_pid(UNIT(s), pid);
3266 notify_dbus = true;
3267 }
3268 }
3269
3270 /* Interpret RELOADING= */
3271 if (strv_find(tags, "RELOADING=1")) {
3272
3273 s->notify_state = NOTIFY_RELOADING;
3274
3275 if (s->state == SERVICE_RUNNING)
3276 service_enter_reload_by_notify(s);
3277
3278 notify_dbus = true;
3279 }
3280
3281 /* Interpret READY= */
3282 if (strv_find(tags, "READY=1")) {
3283
3284 s->notify_state = NOTIFY_READY;
3285
3286 /* Type=notify services inform us about completed
3287 * initialization with READY=1 */
3288 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3289 service_enter_start_post(s);
3290
3291 /* Sending READY=1 while we are reloading informs us
3292 * that the reloading is complete */
3293 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3294 service_enter_running(s, SERVICE_SUCCESS);
3295
3296 notify_dbus = true;
3297 }
3298
3299 /* Interpret STOPPING= */
3300 if (strv_find(tags, "STOPPING=1")) {
3301
3302 s->notify_state = NOTIFY_STOPPING;
3303
3304 if (s->state == SERVICE_RUNNING)
3305 service_enter_stop_by_notify(s);
3306
3307 notify_dbus = true;
3308 }
3309
3310 /* Interpret STATUS= */
3311 e = strv_find_startswith(tags, "STATUS=");
3312 if (e) {
3313 _cleanup_free_ char *t = NULL;
3314
3315 if (!isempty(e)) {
3316 if (!utf8_is_valid(e))
3317 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3318 else {
3319 t = strdup(e);
3320 if (!t)
3321 log_oom();
3322 }
3323 }
3324
3325 if (!streq_ptr(s->status_text, t)) {
3326
3327 free_and_replace(s->status_text, t);
3328
3329 notify_dbus = true;
3330 }
3331 }
3332
3333 /* Interpret ERRNO= */
3334 e = strv_find_startswith(tags, "ERRNO=");
3335 if (e) {
3336 int status_errno;
3337
3338 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3339 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3340 else {
3341 if (s->status_errno != status_errno) {
3342 s->status_errno = status_errno;
3343 notify_dbus = true;
3344 }
3345 }
3346 }
3347
3348 /* Interpret WATCHDOG= */
3349 if (strv_find(tags, "WATCHDOG=1"))
3350 service_reset_watchdog(s);
3351
3352 if (strv_find(tags, "FDSTORE=1")) {
3353 const char *name;
3354
3355 name = strv_find_startswith(tags, "FDNAME=");
3356 if (name && !fdname_is_valid(name)) {
3357 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3358 name = NULL;
3359 }
3360
3361 service_add_fd_store_set(s, fds, name);
3362 }
3363
3364 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3365 if (e) {
3366 usec_t watchdog_override_usec;
3367 if (safe_atou64(e, &watchdog_override_usec) < 0)
3368 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3369 else
3370 service_reset_watchdog_timeout(s, watchdog_override_usec);
3371 }
3372
3373 /* Notify clients about changed status or main pid */
3374 if (notify_dbus)
3375 unit_add_to_dbus_queue(u);
3376 }
3377
3378 static int service_get_timeout(Unit *u, usec_t *timeout) {
3379 Service *s = SERVICE(u);
3380 uint64_t t;
3381 int r;
3382
3383 if (!s->timer_event_source)
3384 return 0;
3385
3386 r = sd_event_source_get_time(s->timer_event_source, &t);
3387 if (r < 0)
3388 return r;
3389 if (t == USEC_INFINITY)
3390 return 0;
3391
3392 *timeout = t;
3393 return 1;
3394 }
3395
3396 static void service_bus_name_owner_change(
3397 Unit *u,
3398 const char *name,
3399 const char *old_owner,
3400 const char *new_owner) {
3401
3402 Service *s = SERVICE(u);
3403 int r;
3404
3405 assert(s);
3406 assert(name);
3407
3408 assert(streq(s->bus_name, name));
3409 assert(old_owner || new_owner);
3410
3411 if (old_owner && new_owner)
3412 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3413 else if (old_owner)
3414 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3415 else
3416 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3417
3418 s->bus_name_good = !!new_owner;
3419
3420 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3421 r = free_and_strdup(&s->bus_name_owner, new_owner);
3422 if (r < 0) {
3423 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3424 return;
3425 }
3426
3427 if (s->type == SERVICE_DBUS) {
3428
3429 /* service_enter_running() will figure out what to
3430 * do */
3431 if (s->state == SERVICE_RUNNING)
3432 service_enter_running(s, SERVICE_SUCCESS);
3433 else if (s->state == SERVICE_START && new_owner)
3434 service_enter_start_post(s);
3435
3436 } else if (new_owner &&
3437 s->main_pid <= 0 &&
3438 (s->state == SERVICE_START ||
3439 s->state == SERVICE_START_POST ||
3440 s->state == SERVICE_RUNNING ||
3441 s->state == SERVICE_RELOAD)) {
3442
3443 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3444 pid_t pid;
3445
3446 /* Try to acquire PID from bus service */
3447
3448 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3449 if (r >= 0)
3450 r = sd_bus_creds_get_pid(creds, &pid);
3451 if (r >= 0) {
3452 log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, name, pid);
3453
3454 service_set_main_pid(s, pid);
3455 unit_watch_pid(UNIT(s), pid);
3456 }
3457 }
3458 }
3459
3460 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3461 _cleanup_free_ char *peer = NULL;
3462 int r;
3463
3464 assert(s);
3465 assert(fd >= 0);
3466
3467 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3468 * to be configured. We take ownership of the passed fd on success. */
3469
3470 if (UNIT(s)->load_state != UNIT_LOADED)
3471 return -EINVAL;
3472
3473 if (s->socket_fd >= 0)
3474 return -EBUSY;
3475
3476 if (s->state != SERVICE_DEAD)
3477 return -EAGAIN;
3478
3479 if (getpeername_pretty(fd, true, &peer) >= 0) {
3480
3481 if (UNIT(s)->description) {
3482 _cleanup_free_ char *a;
3483
3484 a = strjoin(UNIT(s)->description, " (", peer, ")");
3485 if (!a)
3486 return -ENOMEM;
3487
3488 r = unit_set_description(UNIT(s), a);
3489 } else
3490 r = unit_set_description(UNIT(s), peer);
3491
3492 if (r < 0)
3493 return r;
3494 }
3495
3496 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3497 if (r < 0)
3498 return r;
3499
3500 s->socket_fd = fd;
3501 s->socket_fd_selinux_context_net = selinux_context_net;
3502
3503 unit_ref_set(&s->accept_socket, UNIT(sock));
3504 return 0;
3505 }
3506
3507 static void service_reset_failed(Unit *u) {
3508 Service *s = SERVICE(u);
3509
3510 assert(s);
3511
3512 if (s->state == SERVICE_FAILED)
3513 service_set_state(s, SERVICE_DEAD);
3514
3515 s->result = SERVICE_SUCCESS;
3516 s->reload_result = SERVICE_SUCCESS;
3517 }
3518
3519 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3520 Service *s = SERVICE(u);
3521
3522 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3523 }
3524
3525 static int service_main_pid(Unit *u) {
3526 Service *s = SERVICE(u);
3527
3528 assert(s);
3529
3530 return s->main_pid;
3531 }
3532
3533 static int service_control_pid(Unit *u) {
3534 Service *s = SERVICE(u);
3535
3536 assert(s);
3537
3538 return s->control_pid;
3539 }
3540
3541 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3542 [SERVICE_RESTART_NO] = "no",
3543 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3544 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3545 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3546 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3547 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3548 [SERVICE_RESTART_ALWAYS] = "always",
3549 };
3550
3551 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3552
3553 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3554 [SERVICE_SIMPLE] = "simple",
3555 [SERVICE_FORKING] = "forking",
3556 [SERVICE_ONESHOT] = "oneshot",
3557 [SERVICE_DBUS] = "dbus",
3558 [SERVICE_NOTIFY] = "notify",
3559 [SERVICE_IDLE] = "idle"
3560 };
3561
3562 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3563
3564 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3565 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3566 [SERVICE_EXEC_START] = "ExecStart",
3567 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3568 [SERVICE_EXEC_RELOAD] = "ExecReload",
3569 [SERVICE_EXEC_STOP] = "ExecStop",
3570 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3571 };
3572
3573 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3574
3575 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3576 [NOTIFY_NONE] = "none",
3577 [NOTIFY_MAIN] = "main",
3578 [NOTIFY_EXEC] = "exec",
3579 [NOTIFY_ALL] = "all"
3580 };
3581
3582 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3583
3584 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3585 [NOTIFY_UNKNOWN] = "unknown",
3586 [NOTIFY_READY] = "ready",
3587 [NOTIFY_RELOADING] = "reloading",
3588 [NOTIFY_STOPPING] = "stopping",
3589 };
3590
3591 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3592
3593 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3594 [SERVICE_SUCCESS] = "success",
3595 [SERVICE_FAILURE_RESOURCES] = "resources",
3596 [SERVICE_FAILURE_PROTOCOL] = "protocol",
3597 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3598 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3599 [SERVICE_FAILURE_SIGNAL] = "signal",
3600 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3601 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3602 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3603 };
3604
3605 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3606
3607 const UnitVTable service_vtable = {
3608 .object_size = sizeof(Service),
3609 .exec_context_offset = offsetof(Service, exec_context),
3610 .cgroup_context_offset = offsetof(Service, cgroup_context),
3611 .kill_context_offset = offsetof(Service, kill_context),
3612 .exec_runtime_offset = offsetof(Service, exec_runtime),
3613 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3614
3615 .sections =
3616 "Unit\0"
3617 "Service\0"
3618 "Install\0",
3619 .private_section = "Service",
3620
3621 .init = service_init,
3622 .done = service_done,
3623 .load = service_load,
3624 .release_resources = service_release_resources,
3625
3626 .coldplug = service_coldplug,
3627
3628 .dump = service_dump,
3629
3630 .start = service_start,
3631 .stop = service_stop,
3632 .reload = service_reload,
3633
3634 .can_reload = service_can_reload,
3635
3636 .kill = service_kill,
3637
3638 .serialize = service_serialize,
3639 .deserialize_item = service_deserialize_item,
3640
3641 .active_state = service_active_state,
3642 .sub_state_to_string = service_sub_state_to_string,
3643
3644 .check_gc = service_check_gc,
3645
3646 .sigchld_event = service_sigchld_event,
3647
3648 .reset_failed = service_reset_failed,
3649
3650 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3651 .notify_message = service_notify_message,
3652
3653 .main_pid = service_main_pid,
3654 .control_pid = service_control_pid,
3655
3656 .bus_name_owner_change = service_bus_name_owner_change,
3657
3658 .bus_vtable = bus_service_vtable,
3659 .bus_set_property = bus_service_set_property,
3660 .bus_commit_properties = bus_service_commit_properties,
3661
3662 .get_timeout = service_get_timeout,
3663 .can_transient = true,
3664
3665 .status_message_formats = {
3666 .starting_stopping = {
3667 [0] = "Starting %s...",
3668 [1] = "Stopping %s...",
3669 },
3670 .finished_start_job = {
3671 [JOB_DONE] = "Started %s.",
3672 [JOB_FAILED] = "Failed to start %s.",
3673 },
3674 .finished_stop_job = {
3675 [JOB_DONE] = "Stopped %s.",
3676 [JOB_FAILED] = "Stopped (with error) %s.",
3677 },
3678 },
3679 };
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