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Merge pull request #6354 from walyong/smack_process_label_free
[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 && r != -EPERM) { /* EPERM indicates fds that aren't pollable, which is OK */
417 free(fs->fdname);
418 free(fs);
419 return r;
420 } else if (r >= 0)
421 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
422
423 LIST_PREPEND(fd_store, s->fd_store, fs);
424 s->n_fd_store++;
425
426 return 1; /* fd newly stored */
427 }
428
429 static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
430 int r;
431
432 assert(s);
433
434 while (fdset_size(fds) > 0) {
435 _cleanup_close_ int fd = -1;
436
437 fd = fdset_steal_first(fds);
438 if (fd < 0)
439 break;
440
441 r = service_add_fd_store(s, fd, name);
442 if (r == -EXFULL)
443 return log_unit_warning_errno(UNIT(s), r,
444 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
445 s->n_fd_store_max);
446 if (r < 0)
447 return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m");
448 if (r > 0)
449 log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name));
450 fd = -1;
451 }
452
453 return 0;
454 }
455
456 static int service_arm_timer(Service *s, usec_t usec) {
457 int r;
458
459 assert(s);
460
461 if (s->timer_event_source) {
462 r = sd_event_source_set_time(s->timer_event_source, usec);
463 if (r < 0)
464 return r;
465
466 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
467 }
468
469 if (usec == USEC_INFINITY)
470 return 0;
471
472 r = sd_event_add_time(
473 UNIT(s)->manager->event,
474 &s->timer_event_source,
475 CLOCK_MONOTONIC,
476 usec, 0,
477 service_dispatch_timer, s);
478 if (r < 0)
479 return r;
480
481 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
482
483 return 0;
484 }
485
486 static int service_verify(Service *s) {
487 assert(s);
488
489 if (UNIT(s)->load_state != UNIT_LOADED)
490 return 0;
491
492 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
493 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
494 return -EINVAL;
495 }
496
497 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
498 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
499 return -EINVAL;
500 }
501
502 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
503 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
504 return -EINVAL;
505 }
506
507 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
508 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
509 return -EINVAL;
510 }
511
512 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
513 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
514 return -EINVAL;
515 }
516
517 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
518 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
519 return -EINVAL;
520 }
521
522 if (s->type == SERVICE_DBUS && !s->bus_name) {
523 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
524 return -EINVAL;
525 }
526
527 if (s->bus_name && s->type != SERVICE_DBUS)
528 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
529
530 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
531 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
532 return -EINVAL;
533 }
534
535 if (s->usb_function_descriptors && !s->usb_function_strings)
536 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
537
538 if (!s->usb_function_descriptors && s->usb_function_strings)
539 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
540
541 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
542 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
543
544 return 0;
545 }
546
547 static int service_add_default_dependencies(Service *s) {
548 int r;
549
550 assert(s);
551
552 if (!UNIT(s)->default_dependencies)
553 return 0;
554
555 /* Add a number of automatic dependencies useful for the
556 * majority of services. */
557
558 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
559 /* First, pull in the really early boot stuff, and
560 * require it, so that we fail if we can't acquire
561 * it. */
562
563 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
564 if (r < 0)
565 return r;
566 } else {
567
568 /* In the --user instance there's no sysinit.target,
569 * in that case require basic.target instead. */
570
571 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
572 if (r < 0)
573 return r;
574 }
575
576 /* Second, if the rest of the base system is in the same
577 * transaction, order us after it, but do not pull it in or
578 * even require it. */
579 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
580 if (r < 0)
581 return r;
582
583 /* Third, add us in for normal shutdown. */
584 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
585 }
586
587 static void service_fix_output(Service *s) {
588 assert(s);
589
590 /* If nothing has been explicitly configured, patch default
591 * output in. If input is socket/tty we avoid this however,
592 * since in that case we want output to default to the same
593 * place as we read input from. */
594
595 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
596 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
597 s->exec_context.std_input == EXEC_INPUT_NULL)
598 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
599
600 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
601 s->exec_context.std_input == EXEC_INPUT_NULL)
602 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
603 }
604
605 static int service_setup_bus_name(Service *s) {
606 int r;
607
608 assert(s);
609
610 if (!s->bus_name)
611 return 0;
612
613 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
614 if (r < 0)
615 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
616
617 /* Regardless if kdbus is used or not, we always want to be ordered against dbus.socket if both are in the transaction. */
618 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
619 if (r < 0)
620 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
621
622 r = unit_watch_bus_name(UNIT(s), s->bus_name);
623 if (r == -EEXIST)
624 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
625 if (r < 0)
626 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
627
628 return 0;
629 }
630
631 static int service_add_extras(Service *s) {
632 int r;
633
634 assert(s);
635
636 if (s->type == _SERVICE_TYPE_INVALID) {
637 /* Figure out a type automatically */
638 if (s->bus_name)
639 s->type = SERVICE_DBUS;
640 else if (s->exec_command[SERVICE_EXEC_START])
641 s->type = SERVICE_SIMPLE;
642 else
643 s->type = SERVICE_ONESHOT;
644 }
645
646 /* Oneshot services have disabled start timeout by default */
647 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
648 s->timeout_start_usec = USEC_INFINITY;
649
650 service_fix_output(s);
651
652 r = unit_patch_contexts(UNIT(s));
653 if (r < 0)
654 return r;
655
656 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
657 if (r < 0)
658 return r;
659
660 r = unit_set_default_slice(UNIT(s));
661 if (r < 0)
662 return r;
663
664 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
665 s->notify_access = NOTIFY_MAIN;
666
667 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
668 s->notify_access = NOTIFY_MAIN;
669
670 r = service_add_default_dependencies(s);
671 if (r < 0)
672 return r;
673
674 r = service_setup_bus_name(s);
675 if (r < 0)
676 return r;
677
678 return 0;
679 }
680
681 static int service_load(Unit *u) {
682 Service *s = SERVICE(u);
683 int r;
684
685 assert(s);
686
687 /* Load a .service file */
688 r = unit_load_fragment(u);
689 if (r < 0)
690 return r;
691
692 /* Still nothing found? Then let's give up */
693 if (u->load_state == UNIT_STUB)
694 return -ENOENT;
695
696 /* This is a new unit? Then let's add in some extras */
697 if (u->load_state == UNIT_LOADED) {
698
699 /* We were able to load something, then let's add in
700 * the dropin directories. */
701 r = unit_load_dropin(u);
702 if (r < 0)
703 return r;
704
705 /* This is a new unit? Then let's add in some
706 * extras */
707 r = service_add_extras(s);
708 if (r < 0)
709 return r;
710 }
711
712 return service_verify(s);
713 }
714
715 static void service_dump(Unit *u, FILE *f, const char *prefix) {
716 ServiceExecCommand c;
717 Service *s = SERVICE(u);
718 const char *prefix2;
719
720 assert(s);
721
722 prefix = strempty(prefix);
723 prefix2 = strjoina(prefix, "\t");
724
725 fprintf(f,
726 "%sService State: %s\n"
727 "%sResult: %s\n"
728 "%sReload Result: %s\n"
729 "%sPermissionsStartOnly: %s\n"
730 "%sRootDirectoryStartOnly: %s\n"
731 "%sRemainAfterExit: %s\n"
732 "%sGuessMainPID: %s\n"
733 "%sType: %s\n"
734 "%sRestart: %s\n"
735 "%sNotifyAccess: %s\n"
736 "%sNotifyState: %s\n",
737 prefix, service_state_to_string(s->state),
738 prefix, service_result_to_string(s->result),
739 prefix, service_result_to_string(s->reload_result),
740 prefix, yes_no(s->permissions_start_only),
741 prefix, yes_no(s->root_directory_start_only),
742 prefix, yes_no(s->remain_after_exit),
743 prefix, yes_no(s->guess_main_pid),
744 prefix, service_type_to_string(s->type),
745 prefix, service_restart_to_string(s->restart),
746 prefix, notify_access_to_string(s->notify_access),
747 prefix, notify_state_to_string(s->notify_state));
748
749 if (s->control_pid > 0)
750 fprintf(f,
751 "%sControl PID: "PID_FMT"\n",
752 prefix, s->control_pid);
753
754 if (s->main_pid > 0)
755 fprintf(f,
756 "%sMain PID: "PID_FMT"\n"
757 "%sMain PID Known: %s\n"
758 "%sMain PID Alien: %s\n",
759 prefix, s->main_pid,
760 prefix, yes_no(s->main_pid_known),
761 prefix, yes_no(s->main_pid_alien));
762
763 if (s->pid_file)
764 fprintf(f,
765 "%sPIDFile: %s\n",
766 prefix, s->pid_file);
767
768 if (s->bus_name)
769 fprintf(f,
770 "%sBusName: %s\n"
771 "%sBus Name Good: %s\n",
772 prefix, s->bus_name,
773 prefix, yes_no(s->bus_name_good));
774
775 if (UNIT_ISSET(s->accept_socket))
776 fprintf(f,
777 "%sAccept Socket: %s\n",
778 prefix, UNIT_DEREF(s->accept_socket)->id);
779
780 kill_context_dump(&s->kill_context, f, prefix);
781 exec_context_dump(&s->exec_context, f, prefix);
782
783 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
784
785 if (!s->exec_command[c])
786 continue;
787
788 fprintf(f, "%s-> %s:\n",
789 prefix, service_exec_command_to_string(c));
790
791 exec_command_dump_list(s->exec_command[c], f, prefix2);
792 }
793
794 if (s->status_text)
795 fprintf(f, "%sStatus Text: %s\n",
796 prefix, s->status_text);
797
798 if (s->n_fd_store_max > 0)
799 fprintf(f,
800 "%sFile Descriptor Store Max: %u\n"
801 "%sFile Descriptor Store Current: %u\n",
802 prefix, s->n_fd_store_max,
803 prefix, s->n_fd_store);
804 }
805
806 static int service_load_pid_file(Service *s, bool may_warn) {
807 _cleanup_free_ char *k = NULL;
808 int r;
809 pid_t pid;
810
811 assert(s);
812
813 if (!s->pid_file)
814 return -ENOENT;
815
816 r = read_one_line_file(s->pid_file, &k);
817 if (r < 0) {
818 if (may_warn)
819 log_unit_info_errno(UNIT(s), r, "PID file %s not readable (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state));
820 return r;
821 }
822
823 r = parse_pid(k, &pid);
824 if (r < 0) {
825 if (may_warn)
826 log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
827 return r;
828 }
829
830 if (!pid_is_alive(pid)) {
831 if (may_warn)
832 log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
833 return -ESRCH;
834 }
835
836 if (s->main_pid_known) {
837 if (pid == s->main_pid)
838 return 0;
839
840 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
841
842 service_unwatch_main_pid(s);
843 s->main_pid_known = false;
844 } else
845 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
846
847 r = service_set_main_pid(s, pid);
848 if (r < 0)
849 return r;
850
851 r = unit_watch_pid(UNIT(s), pid);
852 if (r < 0) /* FIXME: we need to do something here */
853 return log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
854
855 return 0;
856 }
857
858 static void service_search_main_pid(Service *s) {
859 pid_t pid = 0;
860 int r;
861
862 assert(s);
863
864 /* If we know it anyway, don't ever fallback to unreliable
865 * heuristics */
866 if (s->main_pid_known)
867 return;
868
869 if (!s->guess_main_pid)
870 return;
871
872 assert(s->main_pid <= 0);
873
874 if (unit_search_main_pid(UNIT(s), &pid) < 0)
875 return;
876
877 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
878 if (service_set_main_pid(s, pid) < 0)
879 return;
880
881 r = unit_watch_pid(UNIT(s), pid);
882 if (r < 0)
883 /* FIXME: we need to do something here */
884 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
885 }
886
887 static void service_set_state(Service *s, ServiceState state) {
888 ServiceState old_state;
889 const UnitActiveState *table;
890
891 assert(s);
892
893 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
894
895 old_state = s->state;
896 s->state = state;
897
898 service_unwatch_pid_file(s);
899
900 if (!IN_SET(state,
901 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
902 SERVICE_RUNNING,
903 SERVICE_RELOAD,
904 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
905 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
906 SERVICE_AUTO_RESTART))
907 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
908
909 if (!IN_SET(state,
910 SERVICE_START, SERVICE_START_POST,
911 SERVICE_RUNNING, SERVICE_RELOAD,
912 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
913 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
914 service_unwatch_main_pid(s);
915 s->main_command = NULL;
916 }
917
918 if (!IN_SET(state,
919 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
920 SERVICE_RELOAD,
921 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
922 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
923 service_unwatch_control_pid(s);
924 s->control_command = NULL;
925 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
926 }
927
928 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
929 unit_unwatch_all_pids(UNIT(s));
930
931 if (!IN_SET(state,
932 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
933 SERVICE_RUNNING, SERVICE_RELOAD,
934 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
935 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
936 !(state == SERVICE_DEAD && UNIT(s)->job))
937 service_close_socket_fd(s);
938
939 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
940 service_stop_watchdog(s);
941
942 /* For the inactive states unit_notify() will trim the cgroup,
943 * but for exit we have to do that ourselves... */
944 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
945 unit_prune_cgroup(UNIT(s));
946
947 /* For remain_after_exit services, let's see if we can "release" the
948 * hold on the console, since unit_notify() only does that in case of
949 * change of state */
950 if (state == SERVICE_EXITED &&
951 s->remain_after_exit &&
952 UNIT(s)->manager->n_on_console > 0) {
953
954 ExecContext *ec;
955
956 ec = unit_get_exec_context(UNIT(s));
957 if (ec && exec_context_may_touch_console(ec)) {
958 Manager *m = UNIT(s)->manager;
959
960 m->n_on_console--;
961 if (m->n_on_console == 0)
962 /* unset no_console_output flag, since the console is free */
963 m->no_console_output = false;
964 }
965 }
966
967 if (old_state != state)
968 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
969
970 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
971 }
972
973 static usec_t service_coldplug_timeout(Service *s) {
974 assert(s);
975
976 switch (s->deserialized_state) {
977
978 case SERVICE_START_PRE:
979 case SERVICE_START:
980 case SERVICE_START_POST:
981 case SERVICE_RELOAD:
982 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
983
984 case SERVICE_RUNNING:
985 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
986
987 case SERVICE_STOP:
988 case SERVICE_STOP_SIGABRT:
989 case SERVICE_STOP_SIGTERM:
990 case SERVICE_STOP_SIGKILL:
991 case SERVICE_STOP_POST:
992 case SERVICE_FINAL_SIGTERM:
993 case SERVICE_FINAL_SIGKILL:
994 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
995
996 case SERVICE_AUTO_RESTART:
997 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
998
999 default:
1000 return USEC_INFINITY;
1001 }
1002 }
1003
1004 static int service_coldplug(Unit *u) {
1005 Service *s = SERVICE(u);
1006 int r;
1007
1008 assert(s);
1009 assert(s->state == SERVICE_DEAD);
1010
1011 if (s->deserialized_state == s->state)
1012 return 0;
1013
1014 r = service_arm_timer(s, service_coldplug_timeout(s));
1015 if (r < 0)
1016 return r;
1017
1018 if (s->main_pid > 0 &&
1019 pid_is_unwaited(s->main_pid) &&
1020 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1021 IN_SET(s->deserialized_state,
1022 SERVICE_START, SERVICE_START_POST,
1023 SERVICE_RUNNING, SERVICE_RELOAD,
1024 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1025 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1026 r = unit_watch_pid(UNIT(s), s->main_pid);
1027 if (r < 0)
1028 return r;
1029 }
1030
1031 if (s->control_pid > 0 &&
1032 pid_is_unwaited(s->control_pid) &&
1033 IN_SET(s->deserialized_state,
1034 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1035 SERVICE_RELOAD,
1036 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1037 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1038 r = unit_watch_pid(UNIT(s), s->control_pid);
1039 if (r < 0)
1040 return r;
1041 }
1042
1043 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1044 unit_watch_all_pids(UNIT(s));
1045
1046 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1047 service_start_watchdog(s);
1048
1049 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1050 (void) unit_setup_dynamic_creds(u);
1051
1052 if (UNIT_ISSET(s->accept_socket)) {
1053 Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket));
1054
1055 if (socket->max_connections_per_source > 0) {
1056 SocketPeer *peer;
1057
1058 /* Make a best-effort attempt at bumping the connection count */
1059 if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) {
1060 socket_peer_unref(s->peer);
1061 s->peer = peer;
1062 }
1063 }
1064 }
1065
1066 service_set_state(s, s->deserialized_state);
1067 return 0;
1068 }
1069
1070 static int service_collect_fds(Service *s,
1071 int **fds,
1072 char ***fd_names,
1073 unsigned *n_storage_fds,
1074 unsigned *n_socket_fds) {
1075
1076 _cleanup_strv_free_ char **rfd_names = NULL;
1077 _cleanup_free_ int *rfds = NULL;
1078 unsigned rn_socket_fds = 0, rn_storage_fds = 0;
1079 int r;
1080
1081 assert(s);
1082 assert(fds);
1083 assert(fd_names);
1084 assert(n_socket_fds);
1085
1086 if (s->socket_fd >= 0) {
1087
1088 /* Pass the per-connection socket */
1089
1090 rfds = new(int, 1);
1091 if (!rfds)
1092 return -ENOMEM;
1093 rfds[0] = s->socket_fd;
1094
1095 rfd_names = strv_new("connection", NULL);
1096 if (!rfd_names)
1097 return -ENOMEM;
1098
1099 rn_socket_fds = 1;
1100 } else {
1101 Iterator i;
1102 Unit *u;
1103
1104 /* Pass all our configured sockets for singleton services */
1105
1106 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1107 _cleanup_free_ int *cfds = NULL;
1108 Socket *sock;
1109 int cn_fds;
1110
1111 if (u->type != UNIT_SOCKET)
1112 continue;
1113
1114 sock = SOCKET(u);
1115
1116 cn_fds = socket_collect_fds(sock, &cfds);
1117 if (cn_fds < 0)
1118 return cn_fds;
1119
1120 if (cn_fds <= 0)
1121 continue;
1122
1123 if (!rfds) {
1124 rfds = cfds;
1125 rn_socket_fds = cn_fds;
1126
1127 cfds = NULL;
1128 } else {
1129 int *t;
1130
1131 t = realloc(rfds, (rn_socket_fds + cn_fds) * sizeof(int));
1132 if (!t)
1133 return -ENOMEM;
1134
1135 memcpy(t + rn_socket_fds, cfds, cn_fds * sizeof(int));
1136
1137 rfds = t;
1138 rn_socket_fds += cn_fds;
1139 }
1140
1141 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1142 if (r < 0)
1143 return r;
1144 }
1145 }
1146
1147 if (s->n_fd_store > 0) {
1148 ServiceFDStore *fs;
1149 unsigned n_fds;
1150 char **nl;
1151 int *t;
1152
1153 t = realloc(rfds, (rn_socket_fds + s->n_fd_store) * sizeof(int));
1154 if (!t)
1155 return -ENOMEM;
1156
1157 rfds = t;
1158
1159 nl = realloc(rfd_names, (rn_socket_fds + s->n_fd_store + 1) * sizeof(char*));
1160 if (!nl)
1161 return -ENOMEM;
1162
1163 rfd_names = nl;
1164 n_fds = rn_socket_fds;
1165
1166 LIST_FOREACH(fd_store, fs, s->fd_store) {
1167 rfds[n_fds] = fs->fd;
1168 rfd_names[n_fds] = strdup(strempty(fs->fdname));
1169 if (!rfd_names[n_fds])
1170 return -ENOMEM;
1171
1172 rn_storage_fds++;
1173 n_fds++;
1174 }
1175
1176 rfd_names[n_fds] = NULL;
1177 }
1178
1179 *fds = rfds;
1180 *fd_names = rfd_names;
1181 *n_socket_fds = rn_socket_fds;
1182 *n_storage_fds = rn_storage_fds;
1183
1184 rfds = NULL;
1185 rfd_names = NULL;
1186
1187 return 0;
1188 }
1189
1190 static bool service_exec_needs_notify_socket(Service *s, ExecFlags flags) {
1191 assert(s);
1192
1193 /* Notifications are accepted depending on the process and
1194 * the access setting of the service:
1195 * process: \ access: NONE MAIN EXEC ALL
1196 * main no yes yes yes
1197 * control no no yes yes
1198 * other (forked) no no no yes */
1199
1200 if (flags & EXEC_IS_CONTROL)
1201 /* A control process */
1202 return IN_SET(s->notify_access, NOTIFY_EXEC, NOTIFY_ALL);
1203
1204 /* We only spawn main processes and control processes, so any
1205 * process that is not a control process is a main process */
1206 return s->notify_access != NOTIFY_NONE;
1207 }
1208
1209 static int service_spawn(
1210 Service *s,
1211 ExecCommand *c,
1212 usec_t timeout,
1213 ExecFlags flags,
1214 pid_t *_pid) {
1215
1216 _cleanup_strv_free_ char **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1217 _cleanup_free_ int *fds = NULL;
1218 unsigned n_storage_fds = 0, n_socket_fds = 0, n_env = 0;
1219 const char *path;
1220 pid_t pid;
1221
1222 ExecParameters exec_params = {
1223 .flags = flags,
1224 .stdin_fd = -1,
1225 .stdout_fd = -1,
1226 .stderr_fd = -1,
1227 };
1228
1229 int r;
1230
1231 assert(s);
1232 assert(c);
1233 assert(_pid);
1234
1235 if (flags & EXEC_IS_CONTROL) {
1236 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1237 if (s->permissions_start_only)
1238 exec_params.flags &= ~EXEC_APPLY_PERMISSIONS;
1239 if (s->root_directory_start_only)
1240 exec_params.flags &= ~EXEC_APPLY_CHROOT;
1241 }
1242
1243 (void) unit_realize_cgroup(UNIT(s));
1244 if (s->reset_cpu_usage) {
1245 (void) unit_reset_cpu_usage(UNIT(s));
1246 s->reset_cpu_usage = false;
1247 }
1248
1249 r = unit_setup_exec_runtime(UNIT(s));
1250 if (r < 0)
1251 return r;
1252
1253 r = unit_setup_dynamic_creds(UNIT(s));
1254 if (r < 0)
1255 return r;
1256
1257 if ((flags & EXEC_PASS_FDS) ||
1258 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1259 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1260 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1261
1262 r = service_collect_fds(s, &fds, &fd_names, &n_storage_fds, &n_socket_fds);
1263 if (r < 0)
1264 return r;
1265
1266 log_unit_debug(UNIT(s), "Passing %i fds to service", n_storage_fds + n_socket_fds);
1267 }
1268
1269 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1270 if (r < 0)
1271 return r;
1272
1273 our_env = new0(char*, 9);
1274 if (!our_env)
1275 return -ENOMEM;
1276
1277 if (service_exec_needs_notify_socket(s, flags))
1278 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1279 return -ENOMEM;
1280
1281 if (s->main_pid > 0)
1282 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1283 return -ENOMEM;
1284
1285 if (MANAGER_IS_USER(UNIT(s)->manager))
1286 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0)
1287 return -ENOMEM;
1288
1289 if (s->socket_fd >= 0) {
1290 union sockaddr_union sa;
1291 socklen_t salen = sizeof(sa);
1292
1293 r = getpeername(s->socket_fd, &sa.sa, &salen);
1294 if (r < 0) {
1295 r = -errno;
1296
1297 /* ENOTCONN is legitimate if the endpoint disappeared on shutdown.
1298 * This connection is over, but the socket unit lives on. */
1299 if (r != -ENOTCONN || !IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST))
1300 return r;
1301 }
1302
1303 if (r == 0 && IN_SET(sa.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) {
1304 _cleanup_free_ char *addr = NULL;
1305 char *t;
1306 unsigned port;
1307
1308 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1309 if (r < 0)
1310 return r;
1311
1312 t = strappend("REMOTE_ADDR=", addr);
1313 if (!t)
1314 return -ENOMEM;
1315 our_env[n_env++] = t;
1316
1317 r = sockaddr_port(&sa.sa, &port);
1318 if (r < 0)
1319 return r;
1320
1321 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1322 return -ENOMEM;
1323 our_env[n_env++] = t;
1324 }
1325 }
1326
1327 if (flags & EXEC_SETENV_RESULT) {
1328 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1329 return -ENOMEM;
1330
1331 if (s->main_exec_status.pid > 0 &&
1332 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1333 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1334 return -ENOMEM;
1335
1336 if (s->main_exec_status.code == CLD_EXITED)
1337 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1338 else
1339 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1340 if (r < 0)
1341 return -ENOMEM;
1342 }
1343 }
1344
1345 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1346 if (!final_env)
1347 return -ENOMEM;
1348
1349 if ((flags & EXEC_IS_CONTROL) && UNIT(s)->cgroup_path) {
1350 path = strjoina(UNIT(s)->cgroup_path, "/control");
1351 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1352 } else
1353 path = UNIT(s)->cgroup_path;
1354
1355 exec_params.flags |= MANAGER_IS_SYSTEM(UNIT(s)->manager) ? EXEC_NEW_KEYRING : 0;
1356 exec_params.argv = c->argv;
1357 exec_params.environment = final_env;
1358 exec_params.fds = fds;
1359 exec_params.fd_names = fd_names;
1360 exec_params.n_storage_fds = n_storage_fds;
1361 exec_params.n_socket_fds = n_socket_fds;
1362 exec_params.confirm_spawn = manager_get_confirm_spawn(UNIT(s)->manager);
1363 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1364 exec_params.cgroup_path = path;
1365 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1366 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1367 exec_params.watchdog_usec = s->watchdog_usec;
1368 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1369 if (s->type == SERVICE_IDLE)
1370 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1371 exec_params.stdin_fd = s->stdin_fd;
1372 exec_params.stdout_fd = s->stdout_fd;
1373 exec_params.stderr_fd = s->stderr_fd;
1374
1375 r = exec_spawn(UNIT(s),
1376 c,
1377 &s->exec_context,
1378 &exec_params,
1379 s->exec_runtime,
1380 &s->dynamic_creds,
1381 &pid);
1382 if (r < 0)
1383 return r;
1384
1385 r = unit_watch_pid(UNIT(s), pid);
1386 if (r < 0) /* FIXME: we need to do something here */
1387 return r;
1388
1389 *_pid = pid;
1390
1391 return 0;
1392 }
1393
1394 static int main_pid_good(Service *s) {
1395 assert(s);
1396
1397 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1398 * don't know */
1399
1400 /* If we know the pid file, then let's just check if it is
1401 * still valid */
1402 if (s->main_pid_known) {
1403
1404 /* If it's an alien child let's check if it is still
1405 * alive ... */
1406 if (s->main_pid_alien && s->main_pid > 0)
1407 return pid_is_alive(s->main_pid);
1408
1409 /* .. otherwise assume we'll get a SIGCHLD for it,
1410 * which we really should wait for to collect exit
1411 * status and code */
1412 return s->main_pid > 0;
1413 }
1414
1415 /* We don't know the pid */
1416 return -EAGAIN;
1417 }
1418
1419 _pure_ static int control_pid_good(Service *s) {
1420 assert(s);
1421
1422 return s->control_pid > 0;
1423 }
1424
1425 static int cgroup_good(Service *s) {
1426 int r;
1427
1428 assert(s);
1429
1430 if (!UNIT(s)->cgroup_path)
1431 return 0;
1432
1433 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1434 if (r < 0)
1435 return r;
1436
1437 return !r;
1438 }
1439
1440 static bool service_shall_restart(Service *s) {
1441 assert(s);
1442
1443 /* Don't restart after manual stops */
1444 if (s->forbid_restart)
1445 return false;
1446
1447 /* Never restart if this is configured as special exception */
1448 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1449 return false;
1450
1451 /* Restart if the exit code/status are configured as restart triggers */
1452 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1453 return true;
1454
1455 switch (s->restart) {
1456
1457 case SERVICE_RESTART_NO:
1458 return false;
1459
1460 case SERVICE_RESTART_ALWAYS:
1461 return true;
1462
1463 case SERVICE_RESTART_ON_SUCCESS:
1464 return s->result == SERVICE_SUCCESS;
1465
1466 case SERVICE_RESTART_ON_FAILURE:
1467 return s->result != SERVICE_SUCCESS;
1468
1469 case SERVICE_RESTART_ON_ABNORMAL:
1470 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1471
1472 case SERVICE_RESTART_ON_WATCHDOG:
1473 return s->result == SERVICE_FAILURE_WATCHDOG;
1474
1475 case SERVICE_RESTART_ON_ABORT:
1476 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1477
1478 default:
1479 assert_not_reached("unknown restart setting");
1480 }
1481 }
1482
1483 static bool service_will_restart(Service *s) {
1484 assert(s);
1485
1486 if (s->state == SERVICE_AUTO_RESTART)
1487 return true;
1488 if (!UNIT(s)->job)
1489 return false;
1490 if (UNIT(s)->job->type == JOB_START)
1491 return true;
1492 return false;
1493 }
1494
1495 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1496 int r;
1497 assert(s);
1498
1499 if (s->result == SERVICE_SUCCESS)
1500 s->result = f;
1501
1502 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1503
1504 if (s->result != SERVICE_SUCCESS) {
1505 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1506 emergency_action(UNIT(s)->manager, s->emergency_action, UNIT(s)->reboot_arg, "service failed");
1507 }
1508
1509 if (allow_restart && service_shall_restart(s)) {
1510
1511 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1512 if (r < 0)
1513 goto fail;
1514
1515 service_set_state(s, SERVICE_AUTO_RESTART);
1516 }
1517
1518 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1519 s->forbid_restart = false;
1520
1521 /* We want fresh tmpdirs in case service is started again immediately */
1522 exec_runtime_destroy(s->exec_runtime);
1523 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1524
1525 if (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_NO ||
1526 (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !service_will_restart(s)))
1527 /* Also, remove the runtime directory */
1528 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1529
1530 /* Get rid of the IPC bits of the user */
1531 unit_unref_uid_gid(UNIT(s), true);
1532
1533 /* Release the user, and destroy it if we are the only remaining owner */
1534 dynamic_creds_destroy(&s->dynamic_creds);
1535
1536 /* Try to delete the pid file. At this point it will be
1537 * out-of-date, and some software might be confused by it, so
1538 * let's remove it. */
1539 if (s->pid_file)
1540 (void) unlink(s->pid_file);
1541
1542 return;
1543
1544 fail:
1545 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1546 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1547 }
1548
1549 static void service_enter_stop_post(Service *s, ServiceResult f) {
1550 int r;
1551 assert(s);
1552
1553 if (s->result == SERVICE_SUCCESS)
1554 s->result = f;
1555
1556 service_unwatch_control_pid(s);
1557 unit_watch_all_pids(UNIT(s));
1558
1559 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1560 if (s->control_command) {
1561 s->control_command_id = SERVICE_EXEC_STOP_POST;
1562
1563 r = service_spawn(s,
1564 s->control_command,
1565 s->timeout_stop_usec,
1566 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1567 &s->control_pid);
1568 if (r < 0)
1569 goto fail;
1570
1571 service_set_state(s, SERVICE_STOP_POST);
1572 } else
1573 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1574
1575 return;
1576
1577 fail:
1578 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1579 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1580 }
1581
1582 static int state_to_kill_operation(ServiceState state) {
1583 switch (state) {
1584
1585 case SERVICE_STOP_SIGABRT:
1586 return KILL_ABORT;
1587
1588 case SERVICE_STOP_SIGTERM:
1589 case SERVICE_FINAL_SIGTERM:
1590 return KILL_TERMINATE;
1591
1592 case SERVICE_STOP_SIGKILL:
1593 case SERVICE_FINAL_SIGKILL:
1594 return KILL_KILL;
1595
1596 default:
1597 return _KILL_OPERATION_INVALID;
1598 }
1599 }
1600
1601 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1602 int r;
1603
1604 assert(s);
1605
1606 if (s->result == SERVICE_SUCCESS)
1607 s->result = f;
1608
1609 unit_watch_all_pids(UNIT(s));
1610
1611 r = unit_kill_context(
1612 UNIT(s),
1613 &s->kill_context,
1614 state_to_kill_operation(state),
1615 s->main_pid,
1616 s->control_pid,
1617 s->main_pid_alien);
1618
1619 if (r < 0)
1620 goto fail;
1621
1622 if (r > 0) {
1623 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1624 if (r < 0)
1625 goto fail;
1626
1627 service_set_state(s, state);
1628 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1629 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1630 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1631 service_enter_stop_post(s, SERVICE_SUCCESS);
1632 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1633 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1634 else
1635 service_enter_dead(s, SERVICE_SUCCESS, true);
1636
1637 return;
1638
1639 fail:
1640 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1641
1642 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1643 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1644 else
1645 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1646 }
1647
1648 static void service_enter_stop_by_notify(Service *s) {
1649 assert(s);
1650
1651 unit_watch_all_pids(UNIT(s));
1652
1653 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1654
1655 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1656 service_set_state(s, SERVICE_STOP_SIGTERM);
1657 }
1658
1659 static void service_enter_stop(Service *s, ServiceResult f) {
1660 int r;
1661
1662 assert(s);
1663
1664 if (s->result == SERVICE_SUCCESS)
1665 s->result = f;
1666
1667 service_unwatch_control_pid(s);
1668 unit_watch_all_pids(UNIT(s));
1669
1670 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1671 if (s->control_command) {
1672 s->control_command_id = SERVICE_EXEC_STOP;
1673
1674 r = service_spawn(s,
1675 s->control_command,
1676 s->timeout_stop_usec,
1677 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1678 &s->control_pid);
1679 if (r < 0)
1680 goto fail;
1681
1682 service_set_state(s, SERVICE_STOP);
1683 } else
1684 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1685
1686 return;
1687
1688 fail:
1689 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1690 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1691 }
1692
1693 static bool service_good(Service *s) {
1694 int main_pid_ok;
1695 assert(s);
1696
1697 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1698 return false;
1699
1700 main_pid_ok = main_pid_good(s);
1701 if (main_pid_ok > 0) /* It's alive */
1702 return true;
1703 if (main_pid_ok == 0) /* It's dead */
1704 return false;
1705
1706 /* OK, we don't know anything about the main PID, maybe
1707 * because there is none. Let's check the control group
1708 * instead. */
1709
1710 return cgroup_good(s) != 0;
1711 }
1712
1713 static void service_enter_running(Service *s, ServiceResult f) {
1714 assert(s);
1715
1716 if (s->result == SERVICE_SUCCESS)
1717 s->result = f;
1718
1719 service_unwatch_control_pid(s);
1720
1721 if (service_good(s)) {
1722
1723 /* If there are any queued up sd_notify()
1724 * notifications, process them now */
1725 if (s->notify_state == NOTIFY_RELOADING)
1726 service_enter_reload_by_notify(s);
1727 else if (s->notify_state == NOTIFY_STOPPING)
1728 service_enter_stop_by_notify(s);
1729 else {
1730 service_set_state(s, SERVICE_RUNNING);
1731 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1732 }
1733
1734 } else if (f != SERVICE_SUCCESS)
1735 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
1736 else if (s->remain_after_exit)
1737 service_set_state(s, SERVICE_EXITED);
1738 else
1739 service_enter_stop(s, SERVICE_SUCCESS);
1740 }
1741
1742 static void service_enter_start_post(Service *s) {
1743 int r;
1744 assert(s);
1745
1746 service_unwatch_control_pid(s);
1747 service_reset_watchdog(s);
1748
1749 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1750 if (s->control_command) {
1751 s->control_command_id = SERVICE_EXEC_START_POST;
1752
1753 r = service_spawn(s,
1754 s->control_command,
1755 s->timeout_start_usec,
1756 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1757 &s->control_pid);
1758 if (r < 0)
1759 goto fail;
1760
1761 service_set_state(s, SERVICE_START_POST);
1762 } else
1763 service_enter_running(s, SERVICE_SUCCESS);
1764
1765 return;
1766
1767 fail:
1768 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1769 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1770 }
1771
1772 static void service_kill_control_processes(Service *s) {
1773 char *p;
1774
1775 if (!UNIT(s)->cgroup_path)
1776 return;
1777
1778 p = strjoina(UNIT(s)->cgroup_path, "/control");
1779 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, NULL);
1780 }
1781
1782 static void service_enter_start(Service *s) {
1783 ExecCommand *c;
1784 usec_t timeout;
1785 pid_t pid;
1786 int r;
1787
1788 assert(s);
1789
1790 service_unwatch_control_pid(s);
1791 service_unwatch_main_pid(s);
1792
1793 /* We want to ensure that nobody leaks processes from
1794 * START_PRE here, so let's go on a killing spree, People
1795 * should not spawn long running processes from START_PRE. */
1796 service_kill_control_processes(s);
1797
1798 if (s->type == SERVICE_FORKING) {
1799 s->control_command_id = SERVICE_EXEC_START;
1800 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1801
1802 s->main_command = NULL;
1803 } else {
1804 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1805 s->control_command = NULL;
1806
1807 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1808 }
1809
1810 if (!c) {
1811 if (s->type != SERVICE_ONESHOT) {
1812 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1813 * happen if the configuration changes at runtime. In this case, let's enter a failure
1814 * state. */
1815 log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m");
1816 r = -ENXIO;
1817 goto fail;
1818 }
1819
1820 service_enter_start_post(s);
1821 return;
1822 }
1823
1824 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1825 /* For simple + idle this is the main process. We don't apply any timeout here, but
1826 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1827 timeout = USEC_INFINITY;
1828 else
1829 timeout = s->timeout_start_usec;
1830
1831 r = service_spawn(s,
1832 c,
1833 timeout,
1834 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1835 &pid);
1836 if (r < 0)
1837 goto fail;
1838
1839 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1840 /* For simple services we immediately start
1841 * the START_POST binaries. */
1842
1843 service_set_main_pid(s, pid);
1844 service_enter_start_post(s);
1845
1846 } else if (s->type == SERVICE_FORKING) {
1847
1848 /* For forking services we wait until the start
1849 * process exited. */
1850
1851 s->control_pid = pid;
1852 service_set_state(s, SERVICE_START);
1853
1854 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1855
1856 /* For oneshot services we wait until the start
1857 * process exited, too, but it is our main process. */
1858
1859 /* For D-Bus services we know the main pid right away,
1860 * but wait for the bus name to appear on the
1861 * bus. Notify services are similar. */
1862
1863 service_set_main_pid(s, pid);
1864 service_set_state(s, SERVICE_START);
1865 } else
1866 assert_not_reached("Unknown service type");
1867
1868 return;
1869
1870 fail:
1871 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1872 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1873 }
1874
1875 static void service_enter_start_pre(Service *s) {
1876 int r;
1877
1878 assert(s);
1879
1880 service_unwatch_control_pid(s);
1881
1882 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1883 if (s->control_command) {
1884 /* Before we start anything, let's clear up what might
1885 * be left from previous runs. */
1886 service_kill_control_processes(s);
1887
1888 s->control_command_id = SERVICE_EXEC_START_PRE;
1889
1890 r = service_spawn(s,
1891 s->control_command,
1892 s->timeout_start_usec,
1893 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1894 &s->control_pid);
1895 if (r < 0)
1896 goto fail;
1897
1898 service_set_state(s, SERVICE_START_PRE);
1899 } else
1900 service_enter_start(s);
1901
1902 return;
1903
1904 fail:
1905 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1906 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1907 }
1908
1909 static void service_enter_restart(Service *s) {
1910 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1911 int r;
1912
1913 assert(s);
1914
1915 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1916 /* Don't restart things if we are going down anyway */
1917 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1918
1919 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1920 if (r < 0)
1921 goto fail;
1922
1923 return;
1924 }
1925
1926 /* Any units that are bound to this service must also be
1927 * restarted. We use JOB_RESTART (instead of the more obvious
1928 * JOB_START) here so that those dependency jobs will be added
1929 * as well. */
1930 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1931 if (r < 0)
1932 goto fail;
1933
1934 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1935 * it will be canceled as part of the service_stop() call that
1936 * is executed as part of JOB_RESTART. */
1937
1938 log_unit_debug(UNIT(s), "Scheduled restart job.");
1939 return;
1940
1941 fail:
1942 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
1943 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1944 }
1945
1946 static void service_enter_reload_by_notify(Service *s) {
1947 assert(s);
1948
1949 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
1950 service_set_state(s, SERVICE_RELOAD);
1951 }
1952
1953 static void service_enter_reload(Service *s) {
1954 int r;
1955
1956 assert(s);
1957
1958 service_unwatch_control_pid(s);
1959 s->reload_result = SERVICE_SUCCESS;
1960
1961 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1962 if (s->control_command) {
1963 s->control_command_id = SERVICE_EXEC_RELOAD;
1964
1965 r = service_spawn(s,
1966 s->control_command,
1967 s->timeout_start_usec,
1968 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1969 &s->control_pid);
1970 if (r < 0)
1971 goto fail;
1972
1973 service_set_state(s, SERVICE_RELOAD);
1974 } else
1975 service_enter_running(s, SERVICE_SUCCESS);
1976
1977 return;
1978
1979 fail:
1980 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
1981 s->reload_result = SERVICE_FAILURE_RESOURCES;
1982 service_enter_running(s, SERVICE_SUCCESS);
1983 }
1984
1985 static void service_run_next_control(Service *s) {
1986 usec_t timeout;
1987 int r;
1988
1989 assert(s);
1990 assert(s->control_command);
1991 assert(s->control_command->command_next);
1992
1993 assert(s->control_command_id != SERVICE_EXEC_START);
1994
1995 s->control_command = s->control_command->command_next;
1996 service_unwatch_control_pid(s);
1997
1998 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1999 timeout = s->timeout_start_usec;
2000 else
2001 timeout = s->timeout_stop_usec;
2002
2003 r = service_spawn(s,
2004 s->control_command,
2005 timeout,
2006 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
2007 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
2008 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
2009 &s->control_pid);
2010 if (r < 0)
2011 goto fail;
2012
2013 return;
2014
2015 fail:
2016 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
2017
2018 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_STOP))
2019 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2020 else if (s->state == SERVICE_STOP_POST)
2021 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2022 else if (s->state == SERVICE_RELOAD) {
2023 s->reload_result = SERVICE_FAILURE_RESOURCES;
2024 service_enter_running(s, SERVICE_SUCCESS);
2025 } else
2026 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2027 }
2028
2029 static void service_run_next_main(Service *s) {
2030 pid_t pid;
2031 int r;
2032
2033 assert(s);
2034 assert(s->main_command);
2035 assert(s->main_command->command_next);
2036 assert(s->type == SERVICE_ONESHOT);
2037
2038 s->main_command = s->main_command->command_next;
2039 service_unwatch_main_pid(s);
2040
2041 r = service_spawn(s,
2042 s->main_command,
2043 s->timeout_start_usec,
2044 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
2045 &pid);
2046 if (r < 0)
2047 goto fail;
2048
2049 service_set_main_pid(s, pid);
2050
2051 return;
2052
2053 fail:
2054 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
2055 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2056 }
2057
2058 static int service_start(Unit *u) {
2059 Service *s = SERVICE(u);
2060 int r;
2061
2062 assert(s);
2063
2064 /* We cannot fulfill this request right now, try again later
2065 * please! */
2066 if (IN_SET(s->state,
2067 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2068 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2069 return -EAGAIN;
2070
2071 /* Already on it! */
2072 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2073 return 0;
2074
2075 /* A service that will be restarted must be stopped first to
2076 * trigger BindsTo and/or OnFailure dependencies. If a user
2077 * does not want to wait for the holdoff time to elapse, the
2078 * service should be manually restarted, not started. We
2079 * simply return EAGAIN here, so that any start jobs stay
2080 * queued, and assume that the auto restart timer will
2081 * eventually trigger the restart. */
2082 if (s->state == SERVICE_AUTO_RESTART)
2083 return -EAGAIN;
2084
2085 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2086
2087 /* Make sure we don't enter a busy loop of some kind. */
2088 r = unit_start_limit_test(u);
2089 if (r < 0) {
2090 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2091 return r;
2092 }
2093
2094 r = unit_acquire_invocation_id(u);
2095 if (r < 0)
2096 return r;
2097
2098 s->result = SERVICE_SUCCESS;
2099 s->reload_result = SERVICE_SUCCESS;
2100 s->main_pid_known = false;
2101 s->main_pid_alien = false;
2102 s->forbid_restart = false;
2103 s->reset_cpu_usage = true;
2104
2105 s->status_text = mfree(s->status_text);
2106 s->status_errno = 0;
2107
2108 s->notify_state = NOTIFY_UNKNOWN;
2109
2110 s->watchdog_override_enable = false;
2111 s->watchdog_override_usec = 0;
2112
2113 service_enter_start_pre(s);
2114 return 1;
2115 }
2116
2117 static int service_stop(Unit *u) {
2118 Service *s = SERVICE(u);
2119
2120 assert(s);
2121
2122 /* Don't create restart jobs from manual stops. */
2123 s->forbid_restart = true;
2124
2125 /* Already on it */
2126 if (IN_SET(s->state,
2127 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2128 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2129 return 0;
2130
2131 /* A restart will be scheduled or is in progress. */
2132 if (s->state == SERVICE_AUTO_RESTART) {
2133 service_set_state(s, SERVICE_DEAD);
2134 return 0;
2135 }
2136
2137 /* If there's already something running we go directly into
2138 * kill mode. */
2139 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2140 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2141 return 0;
2142 }
2143
2144 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2145
2146 service_enter_stop(s, SERVICE_SUCCESS);
2147 return 1;
2148 }
2149
2150 static int service_reload(Unit *u) {
2151 Service *s = SERVICE(u);
2152
2153 assert(s);
2154
2155 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2156
2157 service_enter_reload(s);
2158 return 1;
2159 }
2160
2161 _pure_ static bool service_can_reload(Unit *u) {
2162 Service *s = SERVICE(u);
2163
2164 assert(s);
2165
2166 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2167 }
2168
2169 static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) {
2170 Service *s = SERVICE(u);
2171 unsigned idx = 0;
2172 ExecCommand *first, *c;
2173
2174 assert(s);
2175
2176 first = s->exec_command[id];
2177
2178 /* Figure out where we are in the list by walking back to the beginning */
2179 for (c = current; c != first; c = c->command_prev)
2180 idx++;
2181
2182 return idx;
2183 }
2184
2185 static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) {
2186 Service *s = SERVICE(u);
2187 ServiceExecCommand id;
2188 unsigned idx;
2189 const char *type;
2190 char **arg;
2191 _cleanup_free_ char *args = NULL, *p = NULL;
2192 size_t allocated = 0, length = 0;
2193
2194 assert(s);
2195 assert(f);
2196
2197 if (!command)
2198 return 0;
2199
2200 if (command == s->control_command) {
2201 type = "control";
2202 id = s->control_command_id;
2203 } else {
2204 type = "main";
2205 id = SERVICE_EXEC_START;
2206 }
2207
2208 idx = service_exec_command_index(u, id, command);
2209
2210 STRV_FOREACH(arg, command->argv) {
2211 size_t n;
2212 _cleanup_free_ char *e = NULL;
2213
2214 e = xescape(*arg, WHITESPACE);
2215 if (!e)
2216 return -ENOMEM;
2217
2218 n = strlen(e);
2219 if (!GREEDY_REALLOC(args, allocated, length + 1 + n + 1))
2220 return -ENOMEM;
2221
2222 if (length > 0)
2223 args[length++] = ' ';
2224
2225 memcpy(args + length, e, n);
2226 length += n;
2227 }
2228
2229 if (!GREEDY_REALLOC(args, allocated, length + 1))
2230 return -ENOMEM;
2231 args[length++] = 0;
2232
2233 p = xescape(command->path, WHITESPACE);
2234 if (!p)
2235 return -ENOMEM;
2236
2237 fprintf(f, "%s-command=%s %u %s %s\n", type, service_exec_command_to_string(id), idx, p, args);
2238
2239 return 0;
2240 }
2241
2242 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2243 Service *s = SERVICE(u);
2244 ServiceFDStore *fs;
2245 int r;
2246
2247 assert(u);
2248 assert(f);
2249 assert(fds);
2250
2251 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2252 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2253 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2254
2255 if (s->control_pid > 0)
2256 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2257
2258 if (s->main_pid_known && s->main_pid > 0)
2259 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2260
2261 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2262 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2263 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2264
2265 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2266 if (r < 0)
2267 return r;
2268
2269 service_serialize_exec_command(u, f, s->control_command);
2270 service_serialize_exec_command(u, f, s->main_command);
2271
2272 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2273 if (r < 0)
2274 return r;
2275 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2276 if (r < 0)
2277 return r;
2278 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2279 if (r < 0)
2280 return r;
2281
2282 if (UNIT_ISSET(s->accept_socket)) {
2283 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2284 if (r < 0)
2285 return r;
2286 }
2287
2288 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2289 if (r < 0)
2290 return r;
2291
2292 LIST_FOREACH(fd_store, fs, s->fd_store) {
2293 _cleanup_free_ char *c = NULL;
2294 int copy;
2295
2296 copy = fdset_put_dup(fds, fs->fd);
2297 if (copy < 0)
2298 return copy;
2299
2300 c = cescape(fs->fdname);
2301
2302 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2303 }
2304
2305 if (s->main_exec_status.pid > 0) {
2306 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2307 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2308 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2309
2310 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2311 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2312 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2313 }
2314 }
2315
2316 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2317
2318 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2319
2320 if (s->watchdog_override_enable)
2321 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2322
2323 return 0;
2324 }
2325
2326 static int service_deserialize_exec_command(Unit *u, const char *key, const char *value) {
2327 Service *s = SERVICE(u);
2328 int r;
2329 unsigned idx = 0, i;
2330 bool control, found = false;
2331 ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID;
2332 ExecCommand *command = NULL;
2333 _cleanup_free_ char *path = NULL;
2334 _cleanup_strv_free_ char **argv = NULL;
2335
2336 enum ExecCommandState {
2337 STATE_EXEC_COMMAND_TYPE,
2338 STATE_EXEC_COMMAND_INDEX,
2339 STATE_EXEC_COMMAND_PATH,
2340 STATE_EXEC_COMMAND_ARGS,
2341 _STATE_EXEC_COMMAND_MAX,
2342 _STATE_EXEC_COMMAND_INVALID = -1,
2343 } state;
2344
2345 assert(s);
2346 assert(key);
2347 assert(value);
2348
2349 control = streq(key, "control-command");
2350
2351 state = STATE_EXEC_COMMAND_TYPE;
2352
2353 for (;;) {
2354 _cleanup_free_ char *arg = NULL;
2355
2356 r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE);
2357 if (r == 0)
2358 break;
2359 else if (r < 0)
2360 return r;
2361
2362 switch (state) {
2363 case STATE_EXEC_COMMAND_TYPE:
2364 id = service_exec_command_from_string(arg);
2365 if (id < 0)
2366 return -EINVAL;
2367
2368 state = STATE_EXEC_COMMAND_INDEX;
2369 break;
2370 case STATE_EXEC_COMMAND_INDEX:
2371 r = safe_atou(arg, &idx);
2372 if (r < 0)
2373 return -EINVAL;
2374
2375 state = STATE_EXEC_COMMAND_PATH;
2376 break;
2377 case STATE_EXEC_COMMAND_PATH:
2378 path = arg;
2379 arg = NULL;
2380 state = STATE_EXEC_COMMAND_ARGS;
2381
2382 if (!path_is_absolute(path))
2383 return -EINVAL;
2384 break;
2385 case STATE_EXEC_COMMAND_ARGS:
2386 r = strv_extend(&argv, arg);
2387 if (r < 0)
2388 return -ENOMEM;
2389 break;
2390 default:
2391 assert_not_reached("Unknown error at deserialization of exec command");
2392 break;
2393 }
2394 }
2395
2396 if (state != STATE_EXEC_COMMAND_ARGS)
2397 return -EINVAL;
2398
2399 /* Let's check whether exec command on given offset matches data that we just deserialized */
2400 for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) {
2401 if (i != idx)
2402 continue;
2403
2404 found = strv_equal(argv, command->argv) && streq(command->path, path);
2405 break;
2406 }
2407
2408 if (!found) {
2409 /* Command at the index we serialized is different, let's look for command that exactly
2410 * matches but is on different index. If there is no such command we will not resume execution. */
2411 for (command = s->exec_command[id]; command; command = command->command_next)
2412 if (strv_equal(command->argv, argv) && streq(command->path, path))
2413 break;
2414 }
2415
2416 if (command && control)
2417 s->control_command = command;
2418 else if (command)
2419 s->main_command = command;
2420 else
2421 log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2422
2423 return 0;
2424 }
2425
2426 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2427 Service *s = SERVICE(u);
2428 int r;
2429
2430 assert(u);
2431 assert(key);
2432 assert(value);
2433 assert(fds);
2434
2435 if (streq(key, "state")) {
2436 ServiceState state;
2437
2438 state = service_state_from_string(value);
2439 if (state < 0)
2440 log_unit_debug(u, "Failed to parse state value: %s", value);
2441 else
2442 s->deserialized_state = state;
2443 } else if (streq(key, "result")) {
2444 ServiceResult f;
2445
2446 f = service_result_from_string(value);
2447 if (f < 0)
2448 log_unit_debug(u, "Failed to parse result value: %s", value);
2449 else if (f != SERVICE_SUCCESS)
2450 s->result = f;
2451
2452 } else if (streq(key, "reload-result")) {
2453 ServiceResult f;
2454
2455 f = service_result_from_string(value);
2456 if (f < 0)
2457 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2458 else if (f != SERVICE_SUCCESS)
2459 s->reload_result = f;
2460
2461 } else if (streq(key, "control-pid")) {
2462 pid_t pid;
2463
2464 if (parse_pid(value, &pid) < 0)
2465 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2466 else
2467 s->control_pid = pid;
2468 } else if (streq(key, "main-pid")) {
2469 pid_t pid;
2470
2471 if (parse_pid(value, &pid) < 0)
2472 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2473 else {
2474 service_set_main_pid(s, pid);
2475 unit_watch_pid(UNIT(s), pid);
2476 }
2477 } else if (streq(key, "main-pid-known")) {
2478 int b;
2479
2480 b = parse_boolean(value);
2481 if (b < 0)
2482 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2483 else
2484 s->main_pid_known = b;
2485 } else if (streq(key, "bus-name-good")) {
2486 int b;
2487
2488 b = parse_boolean(value);
2489 if (b < 0)
2490 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2491 else
2492 s->bus_name_good = b;
2493 } else if (streq(key, "bus-name-owner")) {
2494 r = free_and_strdup(&s->bus_name_owner, value);
2495 if (r < 0)
2496 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2497 } else if (streq(key, "status-text")) {
2498 char *t;
2499
2500 r = cunescape(value, 0, &t);
2501 if (r < 0)
2502 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2503 else {
2504 free(s->status_text);
2505 s->status_text = t;
2506 }
2507
2508 } else if (streq(key, "accept-socket")) {
2509 Unit *socket;
2510
2511 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2512 if (r < 0)
2513 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2514 else {
2515 unit_ref_set(&s->accept_socket, socket);
2516 SOCKET(socket)->n_connections++;
2517 }
2518
2519 } else if (streq(key, "socket-fd")) {
2520 int fd;
2521
2522 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2523 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2524 else {
2525 asynchronous_close(s->socket_fd);
2526 s->socket_fd = fdset_remove(fds, fd);
2527 }
2528 } else if (streq(key, "fd-store-fd")) {
2529 const char *fdv;
2530 size_t pf;
2531 int fd;
2532
2533 pf = strcspn(value, WHITESPACE);
2534 fdv = strndupa(value, pf);
2535
2536 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2537 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2538 else {
2539 _cleanup_free_ char *t = NULL;
2540 const char *fdn;
2541
2542 fdn = value + pf;
2543 fdn += strspn(fdn, WHITESPACE);
2544 (void) cunescape(fdn, 0, &t);
2545
2546 r = service_add_fd_store(s, fd, t);
2547 if (r < 0)
2548 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2549 else
2550 fdset_remove(fds, fd);
2551 }
2552
2553 } else if (streq(key, "main-exec-status-pid")) {
2554 pid_t pid;
2555
2556 if (parse_pid(value, &pid) < 0)
2557 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2558 else
2559 s->main_exec_status.pid = pid;
2560 } else if (streq(key, "main-exec-status-code")) {
2561 int i;
2562
2563 if (safe_atoi(value, &i) < 0)
2564 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2565 else
2566 s->main_exec_status.code = i;
2567 } else if (streq(key, "main-exec-status-status")) {
2568 int i;
2569
2570 if (safe_atoi(value, &i) < 0)
2571 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2572 else
2573 s->main_exec_status.status = i;
2574 } else if (streq(key, "main-exec-status-start"))
2575 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2576 else if (streq(key, "main-exec-status-exit"))
2577 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2578 else if (streq(key, "watchdog-timestamp"))
2579 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2580 else if (streq(key, "forbid-restart")) {
2581 int b;
2582
2583 b = parse_boolean(value);
2584 if (b < 0)
2585 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2586 else
2587 s->forbid_restart = b;
2588 } else if (streq(key, "stdin-fd")) {
2589 int fd;
2590
2591 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2592 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2593 else {
2594 asynchronous_close(s->stdin_fd);
2595 s->stdin_fd = fdset_remove(fds, fd);
2596 s->exec_context.stdio_as_fds = true;
2597 }
2598 } else if (streq(key, "stdout-fd")) {
2599 int fd;
2600
2601 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2602 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2603 else {
2604 asynchronous_close(s->stdout_fd);
2605 s->stdout_fd = fdset_remove(fds, fd);
2606 s->exec_context.stdio_as_fds = true;
2607 }
2608 } else if (streq(key, "stderr-fd")) {
2609 int fd;
2610
2611 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2612 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2613 else {
2614 asynchronous_close(s->stderr_fd);
2615 s->stderr_fd = fdset_remove(fds, fd);
2616 s->exec_context.stdio_as_fds = true;
2617 }
2618 } else if (streq(key, "watchdog-override-usec")) {
2619 usec_t watchdog_override_usec;
2620 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2621 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2622 else {
2623 s->watchdog_override_enable = true;
2624 s->watchdog_override_usec = watchdog_override_usec;
2625 }
2626 } else if (STR_IN_SET(key, "main-command", "control-command")) {
2627 r = service_deserialize_exec_command(u, key, value);
2628 if (r < 0)
2629 log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value);
2630 } else
2631 log_unit_debug(u, "Unknown serialization key: %s", key);
2632
2633 return 0;
2634 }
2635
2636 _pure_ static UnitActiveState service_active_state(Unit *u) {
2637 const UnitActiveState *table;
2638
2639 assert(u);
2640
2641 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2642
2643 return table[SERVICE(u)->state];
2644 }
2645
2646 static const char *service_sub_state_to_string(Unit *u) {
2647 assert(u);
2648
2649 return service_state_to_string(SERVICE(u)->state);
2650 }
2651
2652 static bool service_check_gc(Unit *u) {
2653 Service *s = SERVICE(u);
2654
2655 assert(s);
2656
2657 /* Never clean up services that still have a process around,
2658 * even if the service is formally dead. */
2659 if (cgroup_good(s) > 0 ||
2660 main_pid_good(s) > 0 ||
2661 control_pid_good(s) > 0)
2662 return true;
2663
2664 return false;
2665 }
2666
2667 static int service_retry_pid_file(Service *s) {
2668 int r;
2669
2670 assert(s->pid_file);
2671 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2672
2673 r = service_load_pid_file(s, false);
2674 if (r < 0)
2675 return r;
2676
2677 service_unwatch_pid_file(s);
2678
2679 service_enter_running(s, SERVICE_SUCCESS);
2680 return 0;
2681 }
2682
2683 static int service_watch_pid_file(Service *s) {
2684 int r;
2685
2686 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2687
2688 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2689 if (r < 0)
2690 goto fail;
2691
2692 /* the pidfile might have appeared just before we set the watch */
2693 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2694 service_retry_pid_file(s);
2695
2696 return 0;
2697 fail:
2698 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2699 service_unwatch_pid_file(s);
2700 return r;
2701 }
2702
2703 static int service_demand_pid_file(Service *s) {
2704 PathSpec *ps;
2705
2706 assert(s->pid_file);
2707 assert(!s->pid_file_pathspec);
2708
2709 ps = new0(PathSpec, 1);
2710 if (!ps)
2711 return -ENOMEM;
2712
2713 ps->unit = UNIT(s);
2714 ps->path = strdup(s->pid_file);
2715 if (!ps->path) {
2716 free(ps);
2717 return -ENOMEM;
2718 }
2719
2720 path_kill_slashes(ps->path);
2721
2722 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2723 * keep their PID file open all the time. */
2724 ps->type = PATH_MODIFIED;
2725 ps->inotify_fd = -1;
2726
2727 s->pid_file_pathspec = ps;
2728
2729 return service_watch_pid_file(s);
2730 }
2731
2732 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2733 PathSpec *p = userdata;
2734 Service *s;
2735
2736 assert(p);
2737
2738 s = SERVICE(p->unit);
2739
2740 assert(s);
2741 assert(fd >= 0);
2742 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2743 assert(s->pid_file_pathspec);
2744 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2745
2746 log_unit_debug(UNIT(s), "inotify event");
2747
2748 if (path_spec_fd_event(p, events) < 0)
2749 goto fail;
2750
2751 if (service_retry_pid_file(s) == 0)
2752 return 0;
2753
2754 if (service_watch_pid_file(s) < 0)
2755 goto fail;
2756
2757 return 0;
2758
2759 fail:
2760 service_unwatch_pid_file(s);
2761 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2762 return 0;
2763 }
2764
2765 static void service_notify_cgroup_empty_event(Unit *u) {
2766 Service *s = SERVICE(u);
2767
2768 assert(u);
2769
2770 log_unit_debug(u, "cgroup is empty");
2771
2772 switch (s->state) {
2773
2774 /* Waiting for SIGCHLD is usually more interesting,
2775 * because it includes return codes/signals. Which is
2776 * why we ignore the cgroup events for most cases,
2777 * except when we don't know pid which to expect the
2778 * SIGCHLD for. */
2779
2780 case SERVICE_START:
2781 if (s->type == SERVICE_NOTIFY) {
2782 /* No chance of getting a ready notification anymore */
2783 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2784 break;
2785 }
2786
2787 /* Fall through */
2788
2789 case SERVICE_START_POST:
2790 if (s->pid_file_pathspec) {
2791 /* Give up hoping for the daemon to write its PID file */
2792 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2793
2794 service_unwatch_pid_file(s);
2795 if (s->state == SERVICE_START)
2796 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2797 else
2798 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
2799 }
2800 break;
2801
2802 case SERVICE_RUNNING:
2803 /* service_enter_running() will figure out what to do */
2804 service_enter_running(s, SERVICE_SUCCESS);
2805 break;
2806
2807 case SERVICE_STOP_SIGABRT:
2808 case SERVICE_STOP_SIGTERM:
2809 case SERVICE_STOP_SIGKILL:
2810
2811 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2812 service_enter_stop_post(s, SERVICE_SUCCESS);
2813
2814 break;
2815
2816 case SERVICE_STOP_POST:
2817 case SERVICE_FINAL_SIGTERM:
2818 case SERVICE_FINAL_SIGKILL:
2819 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2820 service_enter_dead(s, SERVICE_SUCCESS, true);
2821
2822 break;
2823
2824 default:
2825 ;
2826 }
2827 }
2828
2829 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2830 Service *s = SERVICE(u);
2831 ServiceResult f;
2832
2833 assert(s);
2834 assert(pid >= 0);
2835
2836 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
2837 f = SERVICE_SUCCESS;
2838 else if (code == CLD_EXITED)
2839 f = SERVICE_FAILURE_EXIT_CODE;
2840 else if (code == CLD_KILLED)
2841 f = SERVICE_FAILURE_SIGNAL;
2842 else if (code == CLD_DUMPED)
2843 f = SERVICE_FAILURE_CORE_DUMP;
2844 else
2845 assert_not_reached("Unknown code");
2846
2847 if (s->main_pid == pid) {
2848 /* Forking services may occasionally move to a new PID.
2849 * As long as they update the PID file before exiting the old
2850 * PID, they're fine. */
2851 if (service_load_pid_file(s, false) == 0)
2852 return;
2853
2854 s->main_pid = 0;
2855 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2856
2857 if (s->main_command) {
2858 /* If this is not a forking service than the
2859 * main process got started and hence we copy
2860 * the exit status so that it is recorded both
2861 * as main and as control process exit
2862 * status */
2863
2864 s->main_command->exec_status = s->main_exec_status;
2865
2866 if (s->main_command->ignore)
2867 f = SERVICE_SUCCESS;
2868 } else if (s->exec_command[SERVICE_EXEC_START]) {
2869
2870 /* If this is a forked process, then we should
2871 * ignore the return value if this was
2872 * configured for the starter process */
2873
2874 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2875 f = SERVICE_SUCCESS;
2876 }
2877
2878 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
2879 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
2880 * that the service already logged the reason at a higher log level on its own. However, if the service
2881 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
2882 * our log level to WARNING then. */
2883
2884 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
2885 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
2886 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2887 sigchld_code_to_string(code), status,
2888 strna(code == CLD_EXITED
2889 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2890 : signal_to_string(status))),
2891 "EXIT_CODE=%s", sigchld_code_to_string(code),
2892 "EXIT_STATUS=%i", status,
2893 LOG_UNIT_ID(u),
2894 NULL);
2895
2896 if (s->result == SERVICE_SUCCESS)
2897 s->result = f;
2898
2899 if (s->main_command &&
2900 s->main_command->command_next &&
2901 f == SERVICE_SUCCESS) {
2902
2903 /* There is another command to *
2904 * execute, so let's do that. */
2905
2906 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2907 service_run_next_main(s);
2908
2909 } else {
2910
2911 /* The service exited, so the service is officially
2912 * gone. */
2913 s->main_command = NULL;
2914
2915 switch (s->state) {
2916
2917 case SERVICE_START_POST:
2918 case SERVICE_RELOAD:
2919 case SERVICE_STOP:
2920 /* Need to wait until the operation is
2921 * done */
2922 break;
2923
2924 case SERVICE_START:
2925 if (s->type == SERVICE_ONESHOT) {
2926 /* This was our main goal, so let's go on */
2927 if (f == SERVICE_SUCCESS)
2928 service_enter_start_post(s);
2929 else
2930 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2931 break;
2932 } else if (s->type == SERVICE_NOTIFY) {
2933 /* Only enter running through a notification, so that the
2934 * SERVICE_START state signifies that no ready notification
2935 * has been received */
2936 if (f != SERVICE_SUCCESS)
2937 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2938 else if (!s->remain_after_exit)
2939 /* The service has never been active */
2940 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
2941 break;
2942 }
2943
2944 /* Fall through */
2945
2946 case SERVICE_RUNNING:
2947 service_enter_running(s, f);
2948 break;
2949
2950 case SERVICE_STOP_SIGABRT:
2951 case SERVICE_STOP_SIGTERM:
2952 case SERVICE_STOP_SIGKILL:
2953
2954 if (!control_pid_good(s))
2955 service_enter_stop_post(s, f);
2956
2957 /* If there is still a control process, wait for that first */
2958 break;
2959
2960 case SERVICE_STOP_POST:
2961 case SERVICE_FINAL_SIGTERM:
2962 case SERVICE_FINAL_SIGKILL:
2963
2964 if (!control_pid_good(s))
2965 service_enter_dead(s, f, true);
2966 break;
2967
2968 default:
2969 assert_not_reached("Uh, main process died at wrong time.");
2970 }
2971 }
2972
2973 } else if (s->control_pid == pid) {
2974 s->control_pid = 0;
2975
2976 if (s->control_command) {
2977 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2978
2979 if (s->control_command->ignore)
2980 f = SERVICE_SUCCESS;
2981 }
2982
2983 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
2984 "Control process exited, code=%s status=%i",
2985 sigchld_code_to_string(code), status);
2986
2987 if (s->result == SERVICE_SUCCESS)
2988 s->result = f;
2989
2990 /* Immediately get rid of the cgroup, so that the
2991 * kernel doesn't delay the cgroup empty messages for
2992 * the service cgroup any longer than necessary */
2993 service_kill_control_processes(s);
2994
2995 if (s->control_command &&
2996 s->control_command->command_next &&
2997 f == SERVICE_SUCCESS) {
2998
2999 /* There is another command to *
3000 * execute, so let's do that. */
3001
3002 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
3003 service_run_next_control(s);
3004
3005 } else {
3006 /* No further commands for this step, so let's
3007 * figure out what to do next */
3008
3009 s->control_command = NULL;
3010 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3011
3012 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
3013
3014 switch (s->state) {
3015
3016 case SERVICE_START_PRE:
3017 if (f == SERVICE_SUCCESS)
3018 service_enter_start(s);
3019 else
3020 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3021 break;
3022
3023 case SERVICE_START:
3024 if (s->type != SERVICE_FORKING)
3025 /* Maybe spurious event due to a reload that changed the type? */
3026 break;
3027
3028 if (f != SERVICE_SUCCESS) {
3029 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3030 break;
3031 }
3032
3033 if (s->pid_file) {
3034 bool has_start_post;
3035 int r;
3036
3037 /* Let's try to load the pid file here if we can.
3038 * The PID file might actually be created by a START_POST
3039 * script. In that case don't worry if the loading fails. */
3040
3041 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3042 r = service_load_pid_file(s, !has_start_post);
3043 if (!has_start_post && r < 0) {
3044 r = service_demand_pid_file(s);
3045 if (r < 0 || !cgroup_good(s))
3046 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3047 break;
3048 }
3049 } else
3050 service_search_main_pid(s);
3051
3052 service_enter_start_post(s);
3053 break;
3054
3055 case SERVICE_START_POST:
3056 if (f != SERVICE_SUCCESS) {
3057 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3058 break;
3059 }
3060
3061 if (s->pid_file) {
3062 int r;
3063
3064 r = service_load_pid_file(s, true);
3065 if (r < 0) {
3066 r = service_demand_pid_file(s);
3067 if (r < 0 || !cgroup_good(s))
3068 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
3069 break;
3070 }
3071 } else
3072 service_search_main_pid(s);
3073
3074 service_enter_running(s, SERVICE_SUCCESS);
3075 break;
3076
3077 case SERVICE_RELOAD:
3078 if (f == SERVICE_SUCCESS)
3079 if (service_load_pid_file(s, true) < 0)
3080 service_search_main_pid(s);
3081
3082 s->reload_result = f;
3083 service_enter_running(s, SERVICE_SUCCESS);
3084 break;
3085
3086 case SERVICE_STOP:
3087 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3088 break;
3089
3090 case SERVICE_STOP_SIGABRT:
3091 case SERVICE_STOP_SIGTERM:
3092 case SERVICE_STOP_SIGKILL:
3093 if (main_pid_good(s) <= 0)
3094 service_enter_stop_post(s, f);
3095
3096 /* If there is still a service
3097 * process around, wait until
3098 * that one quit, too */
3099 break;
3100
3101 case SERVICE_STOP_POST:
3102 case SERVICE_FINAL_SIGTERM:
3103 case SERVICE_FINAL_SIGKILL:
3104 if (main_pid_good(s) <= 0)
3105 service_enter_dead(s, f, true);
3106 break;
3107
3108 default:
3109 assert_not_reached("Uh, control process died at wrong time.");
3110 }
3111 }
3112 }
3113
3114 /* Notify clients about changed exit status */
3115 unit_add_to_dbus_queue(u);
3116
3117 /* We got one SIGCHLD for the service, let's watch all
3118 * processes that are now running of the service, and watch
3119 * that. Among the PIDs we then watch will be children
3120 * reassigned to us, which hopefully allows us to identify
3121 * when all children are gone */
3122 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3123 unit_watch_all_pids(u);
3124
3125 /* If the PID set is empty now, then let's finish this off
3126 (On unified we use proper notifications) */
3127 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) == 0 && set_isempty(u->pids))
3128 service_notify_cgroup_empty_event(u);
3129 }
3130
3131 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3132 Service *s = SERVICE(userdata);
3133
3134 assert(s);
3135 assert(source == s->timer_event_source);
3136
3137 switch (s->state) {
3138
3139 case SERVICE_START_PRE:
3140 case SERVICE_START:
3141 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
3142 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3143 break;
3144
3145 case SERVICE_START_POST:
3146 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
3147 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3148 break;
3149
3150 case SERVICE_RUNNING:
3151 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
3152 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3153 break;
3154
3155 case SERVICE_RELOAD:
3156 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
3157 service_kill_control_processes(s);
3158 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3159 service_enter_running(s, SERVICE_SUCCESS);
3160 break;
3161
3162 case SERVICE_STOP:
3163 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
3164 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3165 break;
3166
3167 case SERVICE_STOP_SIGABRT:
3168 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
3169 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3170 break;
3171
3172 case SERVICE_STOP_SIGTERM:
3173 if (s->kill_context.send_sigkill) {
3174 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
3175 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3176 } else {
3177 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3178 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3179 }
3180
3181 break;
3182
3183 case SERVICE_STOP_SIGKILL:
3184 /* Uh, we sent a SIGKILL and it is still not gone?
3185 * Must be something we cannot kill, so let's just be
3186 * weirded out and continue */
3187
3188 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
3189 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3190 break;
3191
3192 case SERVICE_STOP_POST:
3193 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
3194 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3195 break;
3196
3197 case SERVICE_FINAL_SIGTERM:
3198 if (s->kill_context.send_sigkill) {
3199 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
3200 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3201 } else {
3202 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3203 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3204 }
3205
3206 break;
3207
3208 case SERVICE_FINAL_SIGKILL:
3209 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
3210 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3211 break;
3212
3213 case SERVICE_AUTO_RESTART:
3214 log_unit_info(UNIT(s),
3215 s->restart_usec > 0 ?
3216 "Service hold-off time over, scheduling restart." :
3217 "Service has no hold-off time, scheduling restart.");
3218 service_enter_restart(s);
3219 break;
3220
3221 default:
3222 assert_not_reached("Timeout at wrong time.");
3223 }
3224
3225 return 0;
3226 }
3227
3228 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3229 Service *s = SERVICE(userdata);
3230 char t[FORMAT_TIMESPAN_MAX];
3231 usec_t watchdog_usec;
3232
3233 assert(s);
3234 assert(source == s->watchdog_event_source);
3235
3236 watchdog_usec = service_get_watchdog_usec(s);
3237
3238 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3239 format_timespan(t, sizeof(t), watchdog_usec, 1));
3240
3241 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3242
3243 return 0;
3244 }
3245
3246 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
3247 Service *s = SERVICE(u);
3248 _cleanup_free_ char *cc = NULL;
3249 bool notify_dbus = false;
3250 const char *e;
3251
3252 assert(u);
3253
3254 cc = strv_join(tags, ", ");
3255
3256 if (s->notify_access == NOTIFY_NONE) {
3257 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3258 return;
3259 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3260 if (s->main_pid != 0)
3261 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3262 else
3263 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3264 return;
3265 } else if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) {
3266 if (s->main_pid != 0 && s->control_pid != 0)
3267 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,
3268 pid, s->main_pid, s->control_pid);
3269 else if (s->main_pid != 0)
3270 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3271 else if (s->control_pid != 0)
3272 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid);
3273 else
3274 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);
3275 return;
3276 } else
3277 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3278
3279 /* Interpret MAINPID= */
3280 e = strv_find_startswith(tags, "MAINPID=");
3281 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3282 if (parse_pid(e, &pid) < 0)
3283 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3284 else if (pid == s->control_pid)
3285 log_unit_warning(u, "A control process cannot also be the main process");
3286 else if (pid == getpid() || pid == 1)
3287 log_unit_warning(u, "Service manager can't be main process, ignoring sd_notify() MAINPID= field");
3288 else {
3289 service_set_main_pid(s, pid);
3290 unit_watch_pid(UNIT(s), pid);
3291 notify_dbus = true;
3292 }
3293 }
3294
3295 /* Interpret RELOADING= */
3296 if (strv_find(tags, "RELOADING=1")) {
3297
3298 s->notify_state = NOTIFY_RELOADING;
3299
3300 if (s->state == SERVICE_RUNNING)
3301 service_enter_reload_by_notify(s);
3302
3303 notify_dbus = true;
3304 }
3305
3306 /* Interpret READY= */
3307 if (strv_find(tags, "READY=1")) {
3308
3309 s->notify_state = NOTIFY_READY;
3310
3311 /* Type=notify services inform us about completed
3312 * initialization with READY=1 */
3313 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3314 service_enter_start_post(s);
3315
3316 /* Sending READY=1 while we are reloading informs us
3317 * that the reloading is complete */
3318 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3319 service_enter_running(s, SERVICE_SUCCESS);
3320
3321 notify_dbus = true;
3322 }
3323
3324 /* Interpret STOPPING= */
3325 if (strv_find(tags, "STOPPING=1")) {
3326
3327 s->notify_state = NOTIFY_STOPPING;
3328
3329 if (s->state == SERVICE_RUNNING)
3330 service_enter_stop_by_notify(s);
3331
3332 notify_dbus = true;
3333 }
3334
3335 /* Interpret STATUS= */
3336 e = strv_find_startswith(tags, "STATUS=");
3337 if (e) {
3338 _cleanup_free_ char *t = NULL;
3339
3340 if (!isempty(e)) {
3341 if (!utf8_is_valid(e))
3342 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3343 else {
3344 t = strdup(e);
3345 if (!t)
3346 log_oom();
3347 }
3348 }
3349
3350 if (!streq_ptr(s->status_text, t)) {
3351
3352 free_and_replace(s->status_text, t);
3353
3354 notify_dbus = true;
3355 }
3356 }
3357
3358 /* Interpret ERRNO= */
3359 e = strv_find_startswith(tags, "ERRNO=");
3360 if (e) {
3361 int status_errno;
3362
3363 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3364 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3365 else {
3366 if (s->status_errno != status_errno) {
3367 s->status_errno = status_errno;
3368 notify_dbus = true;
3369 }
3370 }
3371 }
3372
3373 /* Interpret WATCHDOG= */
3374 if (strv_find(tags, "WATCHDOG=1"))
3375 service_reset_watchdog(s);
3376
3377 if (strv_find(tags, "FDSTORE=1")) {
3378 const char *name;
3379
3380 name = strv_find_startswith(tags, "FDNAME=");
3381 if (name && !fdname_is_valid(name)) {
3382 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3383 name = NULL;
3384 }
3385
3386 service_add_fd_store_set(s, fds, name);
3387 }
3388
3389 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3390 if (e) {
3391 usec_t watchdog_override_usec;
3392 if (safe_atou64(e, &watchdog_override_usec) < 0)
3393 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3394 else
3395 service_reset_watchdog_timeout(s, watchdog_override_usec);
3396 }
3397
3398 /* Notify clients about changed status or main pid */
3399 if (notify_dbus)
3400 unit_add_to_dbus_queue(u);
3401 }
3402
3403 static int service_get_timeout(Unit *u, usec_t *timeout) {
3404 Service *s = SERVICE(u);
3405 uint64_t t;
3406 int r;
3407
3408 if (!s->timer_event_source)
3409 return 0;
3410
3411 r = sd_event_source_get_time(s->timer_event_source, &t);
3412 if (r < 0)
3413 return r;
3414 if (t == USEC_INFINITY)
3415 return 0;
3416
3417 *timeout = t;
3418 return 1;
3419 }
3420
3421 static void service_bus_name_owner_change(
3422 Unit *u,
3423 const char *name,
3424 const char *old_owner,
3425 const char *new_owner) {
3426
3427 Service *s = SERVICE(u);
3428 int r;
3429
3430 assert(s);
3431 assert(name);
3432
3433 assert(streq(s->bus_name, name));
3434 assert(old_owner || new_owner);
3435
3436 if (old_owner && new_owner)
3437 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3438 else if (old_owner)
3439 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3440 else
3441 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3442
3443 s->bus_name_good = !!new_owner;
3444
3445 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3446 r = free_and_strdup(&s->bus_name_owner, new_owner);
3447 if (r < 0) {
3448 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3449 return;
3450 }
3451
3452 if (s->type == SERVICE_DBUS) {
3453
3454 /* service_enter_running() will figure out what to
3455 * do */
3456 if (s->state == SERVICE_RUNNING)
3457 service_enter_running(s, SERVICE_SUCCESS);
3458 else if (s->state == SERVICE_START && new_owner)
3459 service_enter_start_post(s);
3460
3461 } else if (new_owner &&
3462 s->main_pid <= 0 &&
3463 (s->state == SERVICE_START ||
3464 s->state == SERVICE_START_POST ||
3465 s->state == SERVICE_RUNNING ||
3466 s->state == SERVICE_RELOAD)) {
3467
3468 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3469 pid_t pid;
3470
3471 /* Try to acquire PID from bus service */
3472
3473 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3474 if (r >= 0)
3475 r = sd_bus_creds_get_pid(creds, &pid);
3476 if (r >= 0) {
3477 log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, name, pid);
3478
3479 service_set_main_pid(s, pid);
3480 unit_watch_pid(UNIT(s), pid);
3481 }
3482 }
3483 }
3484
3485 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3486 _cleanup_free_ char *peer = NULL;
3487 int r;
3488
3489 assert(s);
3490 assert(fd >= 0);
3491
3492 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3493 * to be configured. We take ownership of the passed fd on success. */
3494
3495 if (UNIT(s)->load_state != UNIT_LOADED)
3496 return -EINVAL;
3497
3498 if (s->socket_fd >= 0)
3499 return -EBUSY;
3500
3501 if (s->state != SERVICE_DEAD)
3502 return -EAGAIN;
3503
3504 if (getpeername_pretty(fd, true, &peer) >= 0) {
3505
3506 if (UNIT(s)->description) {
3507 _cleanup_free_ char *a;
3508
3509 a = strjoin(UNIT(s)->description, " (", peer, ")");
3510 if (!a)
3511 return -ENOMEM;
3512
3513 r = unit_set_description(UNIT(s), a);
3514 } else
3515 r = unit_set_description(UNIT(s), peer);
3516
3517 if (r < 0)
3518 return r;
3519 }
3520
3521 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3522 if (r < 0)
3523 return r;
3524
3525 s->socket_fd = fd;
3526 s->socket_fd_selinux_context_net = selinux_context_net;
3527
3528 unit_ref_set(&s->accept_socket, UNIT(sock));
3529 return 0;
3530 }
3531
3532 static void service_reset_failed(Unit *u) {
3533 Service *s = SERVICE(u);
3534
3535 assert(s);
3536
3537 if (s->state == SERVICE_FAILED)
3538 service_set_state(s, SERVICE_DEAD);
3539
3540 s->result = SERVICE_SUCCESS;
3541 s->reload_result = SERVICE_SUCCESS;
3542 }
3543
3544 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3545 Service *s = SERVICE(u);
3546
3547 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3548 }
3549
3550 static int service_main_pid(Unit *u) {
3551 Service *s = SERVICE(u);
3552
3553 assert(s);
3554
3555 return s->main_pid;
3556 }
3557
3558 static int service_control_pid(Unit *u) {
3559 Service *s = SERVICE(u);
3560
3561 assert(s);
3562
3563 return s->control_pid;
3564 }
3565
3566 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3567 [SERVICE_RESTART_NO] = "no",
3568 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3569 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3570 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3571 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3572 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3573 [SERVICE_RESTART_ALWAYS] = "always",
3574 };
3575
3576 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3577
3578 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3579 [SERVICE_SIMPLE] = "simple",
3580 [SERVICE_FORKING] = "forking",
3581 [SERVICE_ONESHOT] = "oneshot",
3582 [SERVICE_DBUS] = "dbus",
3583 [SERVICE_NOTIFY] = "notify",
3584 [SERVICE_IDLE] = "idle"
3585 };
3586
3587 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3588
3589 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3590 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3591 [SERVICE_EXEC_START] = "ExecStart",
3592 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3593 [SERVICE_EXEC_RELOAD] = "ExecReload",
3594 [SERVICE_EXEC_STOP] = "ExecStop",
3595 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3596 };
3597
3598 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3599
3600 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3601 [NOTIFY_UNKNOWN] = "unknown",
3602 [NOTIFY_READY] = "ready",
3603 [NOTIFY_RELOADING] = "reloading",
3604 [NOTIFY_STOPPING] = "stopping",
3605 };
3606
3607 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3608
3609 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3610 [SERVICE_SUCCESS] = "success",
3611 [SERVICE_FAILURE_RESOURCES] = "resources",
3612 [SERVICE_FAILURE_PROTOCOL] = "protocol",
3613 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3614 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3615 [SERVICE_FAILURE_SIGNAL] = "signal",
3616 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3617 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3618 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3619 };
3620
3621 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3622
3623 const UnitVTable service_vtable = {
3624 .object_size = sizeof(Service),
3625 .exec_context_offset = offsetof(Service, exec_context),
3626 .cgroup_context_offset = offsetof(Service, cgroup_context),
3627 .kill_context_offset = offsetof(Service, kill_context),
3628 .exec_runtime_offset = offsetof(Service, exec_runtime),
3629 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3630
3631 .sections =
3632 "Unit\0"
3633 "Service\0"
3634 "Install\0",
3635 .private_section = "Service",
3636
3637 .init = service_init,
3638 .done = service_done,
3639 .load = service_load,
3640 .release_resources = service_release_resources,
3641
3642 .coldplug = service_coldplug,
3643
3644 .dump = service_dump,
3645
3646 .start = service_start,
3647 .stop = service_stop,
3648 .reload = service_reload,
3649
3650 .can_reload = service_can_reload,
3651
3652 .kill = service_kill,
3653
3654 .serialize = service_serialize,
3655 .deserialize_item = service_deserialize_item,
3656
3657 .active_state = service_active_state,
3658 .sub_state_to_string = service_sub_state_to_string,
3659
3660 .check_gc = service_check_gc,
3661
3662 .sigchld_event = service_sigchld_event,
3663
3664 .reset_failed = service_reset_failed,
3665
3666 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3667 .notify_message = service_notify_message,
3668
3669 .main_pid = service_main_pid,
3670 .control_pid = service_control_pid,
3671
3672 .bus_name_owner_change = service_bus_name_owner_change,
3673
3674 .bus_vtable = bus_service_vtable,
3675 .bus_set_property = bus_service_set_property,
3676 .bus_commit_properties = bus_service_commit_properties,
3677
3678 .get_timeout = service_get_timeout,
3679 .can_transient = true,
3680
3681 .status_message_formats = {
3682 .starting_stopping = {
3683 [0] = "Starting %s...",
3684 [1] = "Stopping %s...",
3685 },
3686 .finished_start_job = {
3687 [JOB_DONE] = "Started %s.",
3688 [JOB_FAILED] = "Failed to start %s.",
3689 },
3690 .finished_stop_job = {
3691 [JOB_DONE] = "Stopped %s.",
3692 [JOB_FAILED] = "Stopped (with error) %s.",
3693 },
3694 },
3695 };
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