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Merge pull request #6924 from andir/vrf-dhcpv4
[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 "sd-messages.h"
25
26 #include "alloc-util.h"
27 #include "async.h"
28 #include "bus-error.h"
29 #include "bus-kernel.h"
30 #include "bus-util.h"
31 #include "dbus-service.h"
32 #include "def.h"
33 #include "env-util.h"
34 #include "escape.h"
35 #include "exit-status.h"
36 #include "fd-util.h"
37 #include "fileio.h"
38 #include "format-util.h"
39 #include "fs-util.h"
40 #include "load-dropin.h"
41 #include "load-fragment.h"
42 #include "log.h"
43 #include "manager.h"
44 #include "parse-util.h"
45 #include "path-util.h"
46 #include "process-util.h"
47 #include "service.h"
48 #include "signal-util.h"
49 #include "special.h"
50 #include "stdio-util.h"
51 #include "string-table.h"
52 #include "string-util.h"
53 #include "strv.h"
54 #include "unit-name.h"
55 #include "unit.h"
56 #include "utf8.h"
57 #include "util.h"
58
59 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
60 [SERVICE_DEAD] = UNIT_INACTIVE,
61 [SERVICE_START_PRE] = UNIT_ACTIVATING,
62 [SERVICE_START] = UNIT_ACTIVATING,
63 [SERVICE_START_POST] = UNIT_ACTIVATING,
64 [SERVICE_RUNNING] = UNIT_ACTIVE,
65 [SERVICE_EXITED] = UNIT_ACTIVE,
66 [SERVICE_RELOAD] = UNIT_RELOADING,
67 [SERVICE_STOP] = UNIT_DEACTIVATING,
68 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
69 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
70 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
71 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
72 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
73 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
74 [SERVICE_FAILED] = UNIT_FAILED,
75 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
76 };
77
78 /* For Type=idle we never want to delay any other jobs, hence we
79 * consider idle jobs active as soon as we start working on them */
80 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
81 [SERVICE_DEAD] = UNIT_INACTIVE,
82 [SERVICE_START_PRE] = UNIT_ACTIVE,
83 [SERVICE_START] = UNIT_ACTIVE,
84 [SERVICE_START_POST] = UNIT_ACTIVE,
85 [SERVICE_RUNNING] = UNIT_ACTIVE,
86 [SERVICE_EXITED] = UNIT_ACTIVE,
87 [SERVICE_RELOAD] = UNIT_RELOADING,
88 [SERVICE_STOP] = UNIT_DEACTIVATING,
89 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
90 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
91 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
92 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
93 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
94 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
95 [SERVICE_FAILED] = UNIT_FAILED,
96 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
97 };
98
99 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
100 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
101 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
102
103 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
104 static void service_enter_reload_by_notify(Service *s);
105
106 static void service_init(Unit *u) {
107 Service *s = SERVICE(u);
108
109 assert(u);
110 assert(u->load_state == UNIT_STUB);
111
112 s->timeout_start_usec = u->manager->default_timeout_start_usec;
113 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
114 s->restart_usec = u->manager->default_restart_usec;
115 s->runtime_max_usec = USEC_INFINITY;
116 s->type = _SERVICE_TYPE_INVALID;
117 s->socket_fd = -1;
118 s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
119 s->guess_main_pid = true;
120
121 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
122 }
123
124 static void service_unwatch_control_pid(Service *s) {
125 assert(s);
126
127 if (s->control_pid <= 0)
128 return;
129
130 unit_unwatch_pid(UNIT(s), s->control_pid);
131 s->control_pid = 0;
132 }
133
134 static void service_unwatch_main_pid(Service *s) {
135 assert(s);
136
137 if (s->main_pid <= 0)
138 return;
139
140 unit_unwatch_pid(UNIT(s), s->main_pid);
141 s->main_pid = 0;
142 }
143
144 static void service_unwatch_pid_file(Service *s) {
145 if (!s->pid_file_pathspec)
146 return;
147
148 log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path);
149 path_spec_unwatch(s->pid_file_pathspec);
150 path_spec_done(s->pid_file_pathspec);
151 s->pid_file_pathspec = mfree(s->pid_file_pathspec);
152 }
153
154 static int service_set_main_pid(Service *s, pid_t pid) {
155 pid_t ppid;
156
157 assert(s);
158
159 if (pid <= 1)
160 return -EINVAL;
161
162 if (pid == getpid_cached())
163 return -EINVAL;
164
165 if (s->main_pid == pid && s->main_pid_known)
166 return 0;
167
168 if (s->main_pid != pid) {
169 service_unwatch_main_pid(s);
170 exec_status_start(&s->main_exec_status, pid);
171 }
172
173 s->main_pid = pid;
174 s->main_pid_known = true;
175
176 if (get_process_ppid(pid, &ppid) >= 0 && ppid != getpid_cached()) {
177 log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid);
178 s->main_pid_alien = true;
179 } else
180 s->main_pid_alien = false;
181
182 return 0;
183 }
184
185 void service_close_socket_fd(Service *s) {
186 assert(s);
187
188 /* Undo the effect of service_set_socket_fd(). */
189
190 s->socket_fd = asynchronous_close(s->socket_fd);
191
192 if (UNIT_ISSET(s->accept_socket)) {
193 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
194 unit_ref_unset(&s->accept_socket);
195 }
196 }
197
198 static void service_stop_watchdog(Service *s) {
199 assert(s);
200
201 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
202 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
203 }
204
205 static usec_t service_get_watchdog_usec(Service *s) {
206 assert(s);
207
208 if (s->watchdog_override_enable)
209 return s->watchdog_override_usec;
210 else
211 return s->watchdog_usec;
212 }
213
214 static void service_start_watchdog(Service *s) {
215 int r;
216 usec_t watchdog_usec;
217
218 assert(s);
219
220 watchdog_usec = service_get_watchdog_usec(s);
221 if (watchdog_usec == 0 || watchdog_usec == USEC_INFINITY)
222 return;
223
224 if (s->watchdog_event_source) {
225 r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, watchdog_usec));
226 if (r < 0) {
227 log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m");
228 return;
229 }
230
231 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
232 } else {
233 r = sd_event_add_time(
234 UNIT(s)->manager->event,
235 &s->watchdog_event_source,
236 CLOCK_MONOTONIC,
237 usec_add(s->watchdog_timestamp.monotonic, watchdog_usec), 0,
238 service_dispatch_watchdog, s);
239 if (r < 0) {
240 log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m");
241 return;
242 }
243
244 (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog");
245
246 /* Let's process everything else which might be a sign
247 * of living before we consider a service died. */
248 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
249 }
250
251 if (r < 0)
252 log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m");
253 }
254
255 static void service_reset_watchdog(Service *s) {
256 assert(s);
257
258 dual_timestamp_get(&s->watchdog_timestamp);
259 service_start_watchdog(s);
260 }
261
262 static void service_reset_watchdog_timeout(Service *s, usec_t watchdog_override_usec) {
263 assert(s);
264
265 s->watchdog_override_enable = true;
266 s->watchdog_override_usec = watchdog_override_usec;
267 service_reset_watchdog(s);
268
269 log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec);
270 log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec);
271 }
272
273 static void service_fd_store_unlink(ServiceFDStore *fs) {
274
275 if (!fs)
276 return;
277
278 if (fs->service) {
279 assert(fs->service->n_fd_store > 0);
280 LIST_REMOVE(fd_store, fs->service->fd_store, fs);
281 fs->service->n_fd_store--;
282 }
283
284 if (fs->event_source) {
285 sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
286 sd_event_source_unref(fs->event_source);
287 }
288
289 free(fs->fdname);
290 safe_close(fs->fd);
291 free(fs);
292 }
293
294 static void service_release_fd_store(Service *s) {
295 assert(s);
296
297 log_unit_debug(UNIT(s), "Releasing all stored fds");
298 while (s->fd_store)
299 service_fd_store_unlink(s->fd_store);
300
301 assert(s->n_fd_store == 0);
302 }
303
304 static void service_release_resources(Unit *u, bool inactive) {
305 Service *s = SERVICE(u);
306
307 assert(s);
308
309 if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0)
310 return;
311
312 log_unit_debug(u, "Releasing resources.");
313
314 s->stdin_fd = safe_close(s->stdin_fd);
315 s->stdout_fd = safe_close(s->stdout_fd);
316 s->stderr_fd = safe_close(s->stderr_fd);
317
318 if (inactive)
319 service_release_fd_store(s);
320 }
321
322 static void service_done(Unit *u) {
323 Service *s = SERVICE(u);
324
325 assert(s);
326
327 s->pid_file = mfree(s->pid_file);
328 s->status_text = mfree(s->status_text);
329
330 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
331 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
332 s->control_command = NULL;
333 s->main_command = NULL;
334
335 dynamic_creds_unref(&s->dynamic_creds);
336
337 exit_status_set_free(&s->restart_prevent_status);
338 exit_status_set_free(&s->restart_force_status);
339 exit_status_set_free(&s->success_status);
340
341 /* This will leak a process, but at least no memory or any of
342 * our resources */
343 service_unwatch_main_pid(s);
344 service_unwatch_control_pid(s);
345 service_unwatch_pid_file(s);
346
347 if (s->bus_name) {
348 unit_unwatch_bus_name(u, s->bus_name);
349 s->bus_name = mfree(s->bus_name);
350 }
351
352 s->bus_name_owner = mfree(s->bus_name_owner);
353
354 service_close_socket_fd(s);
355 s->peer = socket_peer_unref(s->peer);
356
357 unit_ref_unset(&s->accept_socket);
358
359 service_stop_watchdog(s);
360
361 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
362
363 service_release_resources(u, true);
364 }
365
366 static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
367 ServiceFDStore *fs = userdata;
368
369 assert(e);
370 assert(fs);
371
372 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
373 log_unit_debug(UNIT(fs->service),
374 "Received %s on stored fd %d (%s), closing.",
375 revents & EPOLLERR ? "EPOLLERR" : "EPOLLHUP",
376 fs->fd, strna(fs->fdname));
377 service_fd_store_unlink(fs);
378 return 0;
379 }
380
381 static int service_add_fd_store(Service *s, int fd, const char *name) {
382 ServiceFDStore *fs;
383 int r;
384
385 /* fd is always consumed if we return >= 0 */
386
387 assert(s);
388 assert(fd >= 0);
389
390 if (s->n_fd_store >= s->n_fd_store_max)
391 return -EXFULL; /* Our store is full.
392 * Use this errno rather than E[NM]FILE to distinguish from
393 * the case where systemd itself hits the file limit. */
394
395 LIST_FOREACH(fd_store, fs, s->fd_store) {
396 r = same_fd(fs->fd, fd);
397 if (r < 0)
398 return r;
399 if (r > 0) {
400 safe_close(fd);
401 return 0; /* fd already included */
402 }
403 }
404
405 fs = new0(ServiceFDStore, 1);
406 if (!fs)
407 return -ENOMEM;
408
409 fs->fd = fd;
410 fs->service = s;
411 fs->fdname = strdup(name ?: "stored");
412 if (!fs->fdname) {
413 free(fs);
414 return -ENOMEM;
415 }
416
417 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
418 if (r < 0 && r != -EPERM) { /* EPERM indicates fds that aren't pollable, which is OK */
419 free(fs->fdname);
420 free(fs);
421 return r;
422 } else if (r >= 0)
423 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
424
425 LIST_PREPEND(fd_store, s->fd_store, fs);
426 s->n_fd_store++;
427
428 return 1; /* fd newly stored */
429 }
430
431 static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
432 int r;
433
434 assert(s);
435
436 while (fdset_size(fds) > 0) {
437 _cleanup_close_ int fd = -1;
438
439 fd = fdset_steal_first(fds);
440 if (fd < 0)
441 break;
442
443 r = service_add_fd_store(s, fd, name);
444 if (r == -EXFULL)
445 return log_unit_warning_errno(UNIT(s), r,
446 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
447 s->n_fd_store_max);
448 if (r < 0)
449 return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m");
450 if (r > 0)
451 log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name));
452 fd = -1;
453 }
454
455 return 0;
456 }
457
458 static int service_arm_timer(Service *s, usec_t usec) {
459 int r;
460
461 assert(s);
462
463 if (s->timer_event_source) {
464 r = sd_event_source_set_time(s->timer_event_source, usec);
465 if (r < 0)
466 return r;
467
468 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
469 }
470
471 if (usec == USEC_INFINITY)
472 return 0;
473
474 r = sd_event_add_time(
475 UNIT(s)->manager->event,
476 &s->timer_event_source,
477 CLOCK_MONOTONIC,
478 usec, 0,
479 service_dispatch_timer, s);
480 if (r < 0)
481 return r;
482
483 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
484
485 return 0;
486 }
487
488 static int service_verify(Service *s) {
489 assert(s);
490
491 if (UNIT(s)->load_state != UNIT_LOADED)
492 return 0;
493
494 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
495 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
496 return -EINVAL;
497 }
498
499 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
500 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
501 return -EINVAL;
502 }
503
504 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
505 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
506 return -EINVAL;
507 }
508
509 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
510 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
511 return -EINVAL;
512 }
513
514 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
515 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
516 return -EINVAL;
517 }
518
519 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
520 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
521 return -EINVAL;
522 }
523
524 if (s->type == SERVICE_DBUS && !s->bus_name) {
525 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
526 return -EINVAL;
527 }
528
529 if (s->bus_name && s->type != SERVICE_DBUS)
530 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
531
532 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
533 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
534 return -EINVAL;
535 }
536
537 if (s->usb_function_descriptors && !s->usb_function_strings)
538 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
539
540 if (!s->usb_function_descriptors && s->usb_function_strings)
541 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
542
543 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
544 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
545
546 return 0;
547 }
548
549 static int service_add_default_dependencies(Service *s) {
550 int r;
551
552 assert(s);
553
554 if (!UNIT(s)->default_dependencies)
555 return 0;
556
557 /* Add a number of automatic dependencies useful for the
558 * majority of services. */
559
560 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
561 /* First, pull in the really early boot stuff, and
562 * require it, so that we fail if we can't acquire
563 * it. */
564
565 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
566 if (r < 0)
567 return r;
568 } else {
569
570 /* In the --user instance there's no sysinit.target,
571 * in that case require basic.target instead. */
572
573 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
574 if (r < 0)
575 return r;
576 }
577
578 /* Second, if the rest of the base system is in the same
579 * transaction, order us after it, but do not pull it in or
580 * even require it. */
581 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
582 if (r < 0)
583 return r;
584
585 /* Third, add us in for normal shutdown. */
586 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
587 }
588
589 static void service_fix_output(Service *s) {
590 assert(s);
591
592 /* If nothing has been explicitly configured, patch default
593 * output in. If input is socket/tty we avoid this however,
594 * since in that case we want output to default to the same
595 * place as we read input from. */
596
597 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
598 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
599 s->exec_context.std_input == EXEC_INPUT_NULL)
600 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
601
602 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
603 s->exec_context.std_input == EXEC_INPUT_NULL)
604 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
605 }
606
607 static int service_setup_bus_name(Service *s) {
608 int r;
609
610 assert(s);
611
612 if (!s->bus_name)
613 return 0;
614
615 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
616 if (r < 0)
617 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
618
619 /* We always want to be ordered against dbus.socket if both are in the transaction. */
620 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
621 if (r < 0)
622 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
623
624 r = unit_watch_bus_name(UNIT(s), s->bus_name);
625 if (r == -EEXIST)
626 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
627 if (r < 0)
628 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
629
630 return 0;
631 }
632
633 static int service_add_extras(Service *s) {
634 int r;
635
636 assert(s);
637
638 if (s->type == _SERVICE_TYPE_INVALID) {
639 /* Figure out a type automatically */
640 if (s->bus_name)
641 s->type = SERVICE_DBUS;
642 else if (s->exec_command[SERVICE_EXEC_START])
643 s->type = SERVICE_SIMPLE;
644 else
645 s->type = SERVICE_ONESHOT;
646 }
647
648 /* Oneshot services have disabled start timeout by default */
649 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
650 s->timeout_start_usec = USEC_INFINITY;
651
652 service_fix_output(s);
653
654 r = unit_patch_contexts(UNIT(s));
655 if (r < 0)
656 return r;
657
658 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
659 if (r < 0)
660 return r;
661
662 r = unit_set_default_slice(UNIT(s));
663 if (r < 0)
664 return r;
665
666 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
667 s->notify_access = NOTIFY_MAIN;
668
669 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
670 s->notify_access = NOTIFY_MAIN;
671
672 r = service_add_default_dependencies(s);
673 if (r < 0)
674 return r;
675
676 r = service_setup_bus_name(s);
677 if (r < 0)
678 return r;
679
680 return 0;
681 }
682
683 static int service_load(Unit *u) {
684 Service *s = SERVICE(u);
685 int r;
686
687 assert(s);
688
689 /* Load a .service file */
690 r = unit_load_fragment(u);
691 if (r < 0)
692 return r;
693
694 /* Still nothing found? Then let's give up */
695 if (u->load_state == UNIT_STUB)
696 return -ENOENT;
697
698 /* This is a new unit? Then let's add in some extras */
699 if (u->load_state == UNIT_LOADED) {
700
701 /* We were able to load something, then let's add in
702 * the dropin directories. */
703 r = unit_load_dropin(u);
704 if (r < 0)
705 return r;
706
707 /* This is a new unit? Then let's add in some
708 * extras */
709 r = service_add_extras(s);
710 if (r < 0)
711 return r;
712 }
713
714 return service_verify(s);
715 }
716
717 static void service_dump(Unit *u, FILE *f, const char *prefix) {
718 ServiceExecCommand c;
719 Service *s = SERVICE(u);
720 const char *prefix2;
721
722 assert(s);
723
724 prefix = strempty(prefix);
725 prefix2 = strjoina(prefix, "\t");
726
727 fprintf(f,
728 "%sService State: %s\n"
729 "%sResult: %s\n"
730 "%sReload Result: %s\n"
731 "%sPermissionsStartOnly: %s\n"
732 "%sRootDirectoryStartOnly: %s\n"
733 "%sRemainAfterExit: %s\n"
734 "%sGuessMainPID: %s\n"
735 "%sType: %s\n"
736 "%sRestart: %s\n"
737 "%sNotifyAccess: %s\n"
738 "%sNotifyState: %s\n",
739 prefix, service_state_to_string(s->state),
740 prefix, service_result_to_string(s->result),
741 prefix, service_result_to_string(s->reload_result),
742 prefix, yes_no(s->permissions_start_only),
743 prefix, yes_no(s->root_directory_start_only),
744 prefix, yes_no(s->remain_after_exit),
745 prefix, yes_no(s->guess_main_pid),
746 prefix, service_type_to_string(s->type),
747 prefix, service_restart_to_string(s->restart),
748 prefix, notify_access_to_string(s->notify_access),
749 prefix, notify_state_to_string(s->notify_state));
750
751 if (s->control_pid > 0)
752 fprintf(f,
753 "%sControl PID: "PID_FMT"\n",
754 prefix, s->control_pid);
755
756 if (s->main_pid > 0)
757 fprintf(f,
758 "%sMain PID: "PID_FMT"\n"
759 "%sMain PID Known: %s\n"
760 "%sMain PID Alien: %s\n",
761 prefix, s->main_pid,
762 prefix, yes_no(s->main_pid_known),
763 prefix, yes_no(s->main_pid_alien));
764
765 if (s->pid_file)
766 fprintf(f,
767 "%sPIDFile: %s\n",
768 prefix, s->pid_file);
769
770 if (s->bus_name)
771 fprintf(f,
772 "%sBusName: %s\n"
773 "%sBus Name Good: %s\n",
774 prefix, s->bus_name,
775 prefix, yes_no(s->bus_name_good));
776
777 if (UNIT_ISSET(s->accept_socket))
778 fprintf(f,
779 "%sAccept Socket: %s\n",
780 prefix, UNIT_DEREF(s->accept_socket)->id);
781
782 kill_context_dump(&s->kill_context, f, prefix);
783 exec_context_dump(&s->exec_context, f, prefix);
784
785 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
786
787 if (!s->exec_command[c])
788 continue;
789
790 fprintf(f, "%s-> %s:\n",
791 prefix, service_exec_command_to_string(c));
792
793 exec_command_dump_list(s->exec_command[c], f, prefix2);
794 }
795
796 if (s->status_text)
797 fprintf(f, "%sStatus Text: %s\n",
798 prefix, s->status_text);
799
800 if (s->n_fd_store_max > 0)
801 fprintf(f,
802 "%sFile Descriptor Store Max: %u\n"
803 "%sFile Descriptor Store Current: %u\n",
804 prefix, s->n_fd_store_max,
805 prefix, s->n_fd_store);
806
807 cgroup_context_dump(&s->cgroup_context, f, prefix);
808 }
809
810 static int service_load_pid_file(Service *s, bool may_warn) {
811 _cleanup_free_ char *k = NULL;
812 int r;
813 pid_t pid;
814
815 assert(s);
816
817 if (!s->pid_file)
818 return -ENOENT;
819
820 r = read_one_line_file(s->pid_file, &k);
821 if (r < 0) {
822 if (may_warn)
823 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));
824 return r;
825 }
826
827 r = parse_pid(k, &pid);
828 if (r < 0) {
829 if (may_warn)
830 log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
831 return r;
832 }
833
834 if (!pid_is_alive(pid)) {
835 if (may_warn)
836 log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
837 return -ESRCH;
838 }
839
840 if (s->main_pid_known) {
841 if (pid == s->main_pid)
842 return 0;
843
844 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
845
846 service_unwatch_main_pid(s);
847 s->main_pid_known = false;
848 } else
849 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
850
851 r = service_set_main_pid(s, pid);
852 if (r < 0)
853 return r;
854
855 r = unit_watch_pid(UNIT(s), pid);
856 if (r < 0) /* FIXME: we need to do something here */
857 return log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
858
859 return 0;
860 }
861
862 static void service_search_main_pid(Service *s) {
863 pid_t pid = 0;
864 int r;
865
866 assert(s);
867
868 /* If we know it anyway, don't ever fallback to unreliable
869 * heuristics */
870 if (s->main_pid_known)
871 return;
872
873 if (!s->guess_main_pid)
874 return;
875
876 assert(s->main_pid <= 0);
877
878 if (unit_search_main_pid(UNIT(s), &pid) < 0)
879 return;
880
881 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
882 if (service_set_main_pid(s, pid) < 0)
883 return;
884
885 r = unit_watch_pid(UNIT(s), pid);
886 if (r < 0)
887 /* FIXME: we need to do something here */
888 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
889 }
890
891 static void service_set_state(Service *s, ServiceState state) {
892 ServiceState old_state;
893 const UnitActiveState *table;
894
895 assert(s);
896
897 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
898
899 old_state = s->state;
900 s->state = state;
901
902 service_unwatch_pid_file(s);
903
904 if (!IN_SET(state,
905 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
906 SERVICE_RUNNING,
907 SERVICE_RELOAD,
908 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
909 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
910 SERVICE_AUTO_RESTART))
911 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
912
913 if (!IN_SET(state,
914 SERVICE_START, SERVICE_START_POST,
915 SERVICE_RUNNING, SERVICE_RELOAD,
916 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
917 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
918 service_unwatch_main_pid(s);
919 s->main_command = NULL;
920 }
921
922 if (!IN_SET(state,
923 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
924 SERVICE_RELOAD,
925 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
926 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
927 service_unwatch_control_pid(s);
928 s->control_command = NULL;
929 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
930 }
931
932 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
933 unit_unwatch_all_pids(UNIT(s));
934
935 if (!IN_SET(state,
936 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
937 SERVICE_RUNNING, SERVICE_RELOAD,
938 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
939 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
940 !(state == SERVICE_DEAD && UNIT(s)->job))
941 service_close_socket_fd(s);
942
943 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
944 service_stop_watchdog(s);
945
946 /* For the inactive states unit_notify() will trim the cgroup,
947 * but for exit we have to do that ourselves... */
948 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
949 unit_prune_cgroup(UNIT(s));
950
951 /* For remain_after_exit services, let's see if we can "release" the
952 * hold on the console, since unit_notify() only does that in case of
953 * change of state */
954 if (state == SERVICE_EXITED &&
955 s->remain_after_exit &&
956 UNIT(s)->manager->n_on_console > 0) {
957
958 ExecContext *ec;
959
960 ec = unit_get_exec_context(UNIT(s));
961 if (ec && exec_context_may_touch_console(ec)) {
962 Manager *m = UNIT(s)->manager;
963
964 m->n_on_console--;
965 if (m->n_on_console == 0)
966 /* unset no_console_output flag, since the console is free */
967 m->no_console_output = false;
968 }
969 }
970
971 if (old_state != state)
972 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
973
974 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
975 }
976
977 static usec_t service_coldplug_timeout(Service *s) {
978 assert(s);
979
980 switch (s->deserialized_state) {
981
982 case SERVICE_START_PRE:
983 case SERVICE_START:
984 case SERVICE_START_POST:
985 case SERVICE_RELOAD:
986 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
987
988 case SERVICE_RUNNING:
989 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
990
991 case SERVICE_STOP:
992 case SERVICE_STOP_SIGABRT:
993 case SERVICE_STOP_SIGTERM:
994 case SERVICE_STOP_SIGKILL:
995 case SERVICE_STOP_POST:
996 case SERVICE_FINAL_SIGTERM:
997 case SERVICE_FINAL_SIGKILL:
998 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
999
1000 case SERVICE_AUTO_RESTART:
1001 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
1002
1003 default:
1004 return USEC_INFINITY;
1005 }
1006 }
1007
1008 static int service_coldplug(Unit *u) {
1009 Service *s = SERVICE(u);
1010 int r;
1011
1012 assert(s);
1013 assert(s->state == SERVICE_DEAD);
1014
1015 if (s->deserialized_state == s->state)
1016 return 0;
1017
1018 r = service_arm_timer(s, service_coldplug_timeout(s));
1019 if (r < 0)
1020 return r;
1021
1022 if (s->main_pid > 0 &&
1023 pid_is_unwaited(s->main_pid) &&
1024 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1025 IN_SET(s->deserialized_state,
1026 SERVICE_START, SERVICE_START_POST,
1027 SERVICE_RUNNING, SERVICE_RELOAD,
1028 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1029 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1030 r = unit_watch_pid(UNIT(s), s->main_pid);
1031 if (r < 0)
1032 return r;
1033 }
1034
1035 if (s->control_pid > 0 &&
1036 pid_is_unwaited(s->control_pid) &&
1037 IN_SET(s->deserialized_state,
1038 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1039 SERVICE_RELOAD,
1040 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1041 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1042 r = unit_watch_pid(UNIT(s), s->control_pid);
1043 if (r < 0)
1044 return r;
1045 }
1046
1047 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1048 unit_watch_all_pids(UNIT(s));
1049
1050 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1051 service_start_watchdog(s);
1052
1053 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1054 (void) unit_setup_dynamic_creds(u);
1055
1056 if (UNIT_ISSET(s->accept_socket)) {
1057 Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket));
1058
1059 if (socket->max_connections_per_source > 0) {
1060 SocketPeer *peer;
1061
1062 /* Make a best-effort attempt at bumping the connection count */
1063 if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) {
1064 socket_peer_unref(s->peer);
1065 s->peer = peer;
1066 }
1067 }
1068 }
1069
1070 service_set_state(s, s->deserialized_state);
1071 return 0;
1072 }
1073
1074 static int service_collect_fds(Service *s,
1075 int **fds,
1076 char ***fd_names,
1077 unsigned *n_storage_fds,
1078 unsigned *n_socket_fds) {
1079
1080 _cleanup_strv_free_ char **rfd_names = NULL;
1081 _cleanup_free_ int *rfds = NULL;
1082 unsigned rn_socket_fds = 0, rn_storage_fds = 0;
1083 int r;
1084
1085 assert(s);
1086 assert(fds);
1087 assert(fd_names);
1088 assert(n_socket_fds);
1089
1090 if (s->socket_fd >= 0) {
1091
1092 /* Pass the per-connection socket */
1093
1094 rfds = new(int, 1);
1095 if (!rfds)
1096 return -ENOMEM;
1097 rfds[0] = s->socket_fd;
1098
1099 rfd_names = strv_new("connection", NULL);
1100 if (!rfd_names)
1101 return -ENOMEM;
1102
1103 rn_socket_fds = 1;
1104 } else {
1105 Iterator i;
1106 Unit *u;
1107
1108 /* Pass all our configured sockets for singleton services */
1109
1110 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1111 _cleanup_free_ int *cfds = NULL;
1112 Socket *sock;
1113 int cn_fds;
1114
1115 if (u->type != UNIT_SOCKET)
1116 continue;
1117
1118 sock = SOCKET(u);
1119
1120 cn_fds = socket_collect_fds(sock, &cfds);
1121 if (cn_fds < 0)
1122 return cn_fds;
1123
1124 if (cn_fds <= 0)
1125 continue;
1126
1127 if (!rfds) {
1128 rfds = cfds;
1129 rn_socket_fds = cn_fds;
1130
1131 cfds = NULL;
1132 } else {
1133 int *t;
1134
1135 t = realloc(rfds, (rn_socket_fds + cn_fds) * sizeof(int));
1136 if (!t)
1137 return -ENOMEM;
1138
1139 memcpy(t + rn_socket_fds, cfds, cn_fds * sizeof(int));
1140
1141 rfds = t;
1142 rn_socket_fds += cn_fds;
1143 }
1144
1145 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1146 if (r < 0)
1147 return r;
1148 }
1149 }
1150
1151 if (s->n_fd_store > 0) {
1152 ServiceFDStore *fs;
1153 unsigned n_fds;
1154 char **nl;
1155 int *t;
1156
1157 t = realloc(rfds, (rn_socket_fds + s->n_fd_store) * sizeof(int));
1158 if (!t)
1159 return -ENOMEM;
1160
1161 rfds = t;
1162
1163 nl = realloc(rfd_names, (rn_socket_fds + s->n_fd_store + 1) * sizeof(char*));
1164 if (!nl)
1165 return -ENOMEM;
1166
1167 rfd_names = nl;
1168 n_fds = rn_socket_fds;
1169
1170 LIST_FOREACH(fd_store, fs, s->fd_store) {
1171 rfds[n_fds] = fs->fd;
1172 rfd_names[n_fds] = strdup(strempty(fs->fdname));
1173 if (!rfd_names[n_fds])
1174 return -ENOMEM;
1175
1176 rn_storage_fds++;
1177 n_fds++;
1178 }
1179
1180 rfd_names[n_fds] = NULL;
1181 }
1182
1183 *fds = rfds;
1184 *fd_names = rfd_names;
1185 *n_socket_fds = rn_socket_fds;
1186 *n_storage_fds = rn_storage_fds;
1187
1188 rfds = NULL;
1189 rfd_names = NULL;
1190
1191 return 0;
1192 }
1193
1194 static bool service_exec_needs_notify_socket(Service *s, ExecFlags flags) {
1195 assert(s);
1196
1197 /* Notifications are accepted depending on the process and
1198 * the access setting of the service:
1199 * process: \ access: NONE MAIN EXEC ALL
1200 * main no yes yes yes
1201 * control no no yes yes
1202 * other (forked) no no no yes */
1203
1204 if (flags & EXEC_IS_CONTROL)
1205 /* A control process */
1206 return IN_SET(s->notify_access, NOTIFY_EXEC, NOTIFY_ALL);
1207
1208 /* We only spawn main processes and control processes, so any
1209 * process that is not a control process is a main process */
1210 return s->notify_access != NOTIFY_NONE;
1211 }
1212
1213 static int service_spawn(
1214 Service *s,
1215 ExecCommand *c,
1216 usec_t timeout,
1217 ExecFlags flags,
1218 pid_t *_pid) {
1219
1220 _cleanup_strv_free_ char **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1221 _cleanup_free_ int *fds = NULL;
1222 unsigned n_storage_fds = 0, n_socket_fds = 0, n_env = 0;
1223 pid_t pid;
1224
1225 ExecParameters exec_params = {
1226 .flags = flags,
1227 .stdin_fd = -1,
1228 .stdout_fd = -1,
1229 .stderr_fd = -1,
1230 };
1231
1232 int r;
1233
1234 assert(s);
1235 assert(c);
1236 assert(_pid);
1237
1238 if (flags & EXEC_IS_CONTROL) {
1239 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1240 if (s->permissions_start_only)
1241 exec_params.flags &= ~EXEC_APPLY_SANDBOXING;
1242 if (s->root_directory_start_only)
1243 exec_params.flags &= ~EXEC_APPLY_CHROOT;
1244 }
1245
1246 (void) unit_realize_cgroup(UNIT(s));
1247 if (s->reset_accounting) {
1248 (void) unit_reset_cpu_accounting(UNIT(s));
1249 (void) unit_reset_ip_accounting(UNIT(s));
1250 s->reset_accounting = false;
1251 }
1252
1253 r = unit_setup_exec_runtime(UNIT(s));
1254 if (r < 0)
1255 return r;
1256
1257 r = unit_setup_dynamic_creds(UNIT(s));
1258 if (r < 0)
1259 return r;
1260
1261 if ((flags & EXEC_PASS_FDS) ||
1262 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1263 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1264 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1265
1266 r = service_collect_fds(s, &fds, &fd_names, &n_storage_fds, &n_socket_fds);
1267 if (r < 0)
1268 return r;
1269
1270 log_unit_debug(UNIT(s), "Passing %i fds to service", n_storage_fds + n_socket_fds);
1271 }
1272
1273 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1274 if (r < 0)
1275 return r;
1276
1277 our_env = new0(char*, 9);
1278 if (!our_env)
1279 return -ENOMEM;
1280
1281 if (service_exec_needs_notify_socket(s, flags))
1282 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1283 return -ENOMEM;
1284
1285 if (s->main_pid > 0)
1286 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1287 return -ENOMEM;
1288
1289 if (MANAGER_IS_USER(UNIT(s)->manager))
1290 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid_cached()) < 0)
1291 return -ENOMEM;
1292
1293 if (s->socket_fd >= 0) {
1294 union sockaddr_union sa;
1295 socklen_t salen = sizeof(sa);
1296
1297 r = getpeername(s->socket_fd, &sa.sa, &salen);
1298 if (r < 0) {
1299 r = -errno;
1300
1301 /* ENOTCONN is legitimate if the endpoint disappeared on shutdown.
1302 * This connection is over, but the socket unit lives on. */
1303 if (r != -ENOTCONN || !IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST))
1304 return r;
1305 }
1306
1307 if (r == 0 && IN_SET(sa.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) {
1308 _cleanup_free_ char *addr = NULL;
1309 char *t;
1310 unsigned port;
1311
1312 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1313 if (r < 0)
1314 return r;
1315
1316 t = strappend("REMOTE_ADDR=", addr);
1317 if (!t)
1318 return -ENOMEM;
1319 our_env[n_env++] = t;
1320
1321 r = sockaddr_port(&sa.sa, &port);
1322 if (r < 0)
1323 return r;
1324
1325 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1326 return -ENOMEM;
1327 our_env[n_env++] = t;
1328 }
1329 }
1330
1331 if (flags & EXEC_SETENV_RESULT) {
1332 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1333 return -ENOMEM;
1334
1335 if (s->main_exec_status.pid > 0 &&
1336 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1337 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1338 return -ENOMEM;
1339
1340 if (s->main_exec_status.code == CLD_EXITED)
1341 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1342 else
1343 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1344 if (r < 0)
1345 return -ENOMEM;
1346 }
1347 }
1348
1349 manager_set_exec_params(UNIT(s)->manager, &exec_params);
1350 unit_set_exec_params(UNIT(s), &exec_params);
1351
1352 final_env = strv_env_merge(2, exec_params.environment, our_env, NULL);
1353 if (!final_env)
1354 return -ENOMEM;
1355
1356 if ((flags & EXEC_IS_CONTROL) && UNIT(s)->cgroup_path) {
1357 exec_params.cgroup_path = strjoina(UNIT(s)->cgroup_path, "/control");
1358 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, exec_params.cgroup_path);
1359 }
1360
1361 /* System services should get a new keyring by default. */
1362 SET_FLAG(exec_params.flags, EXEC_NEW_KEYRING, MANAGER_IS_SYSTEM(UNIT(s)->manager));
1363
1364 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1365 SET_FLAG(exec_params.flags, EXEC_NSS_BYPASS_BUS,
1366 MANAGER_IS_SYSTEM(UNIT(s)->manager) && unit_has_name(UNIT(s), SPECIAL_DBUS_SERVICE));
1367
1368 exec_params.argv = c->argv;
1369 exec_params.environment = final_env;
1370 exec_params.fds = fds;
1371 exec_params.fd_names = fd_names;
1372 exec_params.n_storage_fds = n_storage_fds;
1373 exec_params.n_socket_fds = n_socket_fds;
1374 exec_params.watchdog_usec = s->watchdog_usec;
1375 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1376 if (s->type == SERVICE_IDLE)
1377 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1378 exec_params.stdin_fd = s->stdin_fd;
1379 exec_params.stdout_fd = s->stdout_fd;
1380 exec_params.stderr_fd = s->stderr_fd;
1381
1382 r = exec_spawn(UNIT(s),
1383 c,
1384 &s->exec_context,
1385 &exec_params,
1386 s->exec_runtime,
1387 &s->dynamic_creds,
1388 &pid);
1389 if (r < 0)
1390 return r;
1391
1392 r = unit_watch_pid(UNIT(s), pid);
1393 if (r < 0) /* FIXME: we need to do something here */
1394 return r;
1395
1396 *_pid = pid;
1397
1398 return 0;
1399 }
1400
1401 static int main_pid_good(Service *s) {
1402 assert(s);
1403
1404 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1405 * don't know */
1406
1407 /* If we know the pid file, then let's just check if it is
1408 * still valid */
1409 if (s->main_pid_known) {
1410
1411 /* If it's an alien child let's check if it is still
1412 * alive ... */
1413 if (s->main_pid_alien && s->main_pid > 0)
1414 return pid_is_alive(s->main_pid);
1415
1416 /* .. otherwise assume we'll get a SIGCHLD for it,
1417 * which we really should wait for to collect exit
1418 * status and code */
1419 return s->main_pid > 0;
1420 }
1421
1422 /* We don't know the pid */
1423 return -EAGAIN;
1424 }
1425
1426 _pure_ static int control_pid_good(Service *s) {
1427 assert(s);
1428
1429 return s->control_pid > 0;
1430 }
1431
1432 static int cgroup_good(Service *s) {
1433 int r;
1434
1435 assert(s);
1436
1437 if (!UNIT(s)->cgroup_path)
1438 return 0;
1439
1440 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1441 if (r < 0)
1442 return r;
1443
1444 return !r;
1445 }
1446
1447 static bool service_shall_restart(Service *s) {
1448 assert(s);
1449
1450 /* Don't restart after manual stops */
1451 if (s->forbid_restart)
1452 return false;
1453
1454 /* Never restart if this is configured as special exception */
1455 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1456 return false;
1457
1458 /* Restart if the exit code/status are configured as restart triggers */
1459 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1460 return true;
1461
1462 switch (s->restart) {
1463
1464 case SERVICE_RESTART_NO:
1465 return false;
1466
1467 case SERVICE_RESTART_ALWAYS:
1468 return true;
1469
1470 case SERVICE_RESTART_ON_SUCCESS:
1471 return s->result == SERVICE_SUCCESS;
1472
1473 case SERVICE_RESTART_ON_FAILURE:
1474 return s->result != SERVICE_SUCCESS;
1475
1476 case SERVICE_RESTART_ON_ABNORMAL:
1477 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1478
1479 case SERVICE_RESTART_ON_WATCHDOG:
1480 return s->result == SERVICE_FAILURE_WATCHDOG;
1481
1482 case SERVICE_RESTART_ON_ABORT:
1483 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1484
1485 default:
1486 assert_not_reached("unknown restart setting");
1487 }
1488 }
1489
1490 static bool service_will_restart(Service *s) {
1491 assert(s);
1492
1493 if (s->state == SERVICE_AUTO_RESTART)
1494 return true;
1495 if (!UNIT(s)->job)
1496 return false;
1497 if (UNIT(s)->job->type == JOB_START)
1498 return true;
1499 return false;
1500 }
1501
1502 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1503 int r;
1504
1505 assert(s);
1506
1507 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1508 * undo what has already been enqueued. */
1509 if (unit_stop_pending(UNIT(s)))
1510 allow_restart = false;
1511
1512 if (s->result == SERVICE_SUCCESS)
1513 s->result = f;
1514
1515 if (s->result != SERVICE_SUCCESS)
1516 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1517
1518 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1519
1520 if (s->result != SERVICE_SUCCESS)
1521 emergency_action(UNIT(s)->manager, s->emergency_action, UNIT(s)->reboot_arg, "service failed");
1522
1523 if (allow_restart && service_shall_restart(s)) {
1524
1525 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1526 if (r < 0)
1527 goto fail;
1528
1529 service_set_state(s, SERVICE_AUTO_RESTART);
1530 } else
1531 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1532 * user can still introspect the counter. Do so on the next start. */
1533 s->flush_n_restarts = true;
1534
1535 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1536 s->forbid_restart = false;
1537
1538 /* We want fresh tmpdirs in case service is started again immediately */
1539 exec_runtime_destroy(s->exec_runtime);
1540 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1541
1542 if (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_NO ||
1543 (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !service_will_restart(s)))
1544 /* Also, remove the runtime directory */
1545 exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
1546
1547 /* Get rid of the IPC bits of the user */
1548 unit_unref_uid_gid(UNIT(s), true);
1549
1550 /* Release the user, and destroy it if we are the only remaining owner */
1551 dynamic_creds_destroy(&s->dynamic_creds);
1552
1553 /* Try to delete the pid file. At this point it will be
1554 * out-of-date, and some software might be confused by it, so
1555 * let's remove it. */
1556 if (s->pid_file)
1557 (void) unlink(s->pid_file);
1558
1559 return;
1560
1561 fail:
1562 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1563 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1564 }
1565
1566 static void service_enter_stop_post(Service *s, ServiceResult f) {
1567 int r;
1568 assert(s);
1569
1570 if (s->result == SERVICE_SUCCESS)
1571 s->result = f;
1572
1573 service_unwatch_control_pid(s);
1574 unit_watch_all_pids(UNIT(s));
1575
1576 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1577 if (s->control_command) {
1578 s->control_command_id = SERVICE_EXEC_STOP_POST;
1579
1580 r = service_spawn(s,
1581 s->control_command,
1582 s->timeout_stop_usec,
1583 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1584 &s->control_pid);
1585 if (r < 0)
1586 goto fail;
1587
1588 service_set_state(s, SERVICE_STOP_POST);
1589 } else
1590 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1591
1592 return;
1593
1594 fail:
1595 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1596 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1597 }
1598
1599 static int state_to_kill_operation(ServiceState state) {
1600 switch (state) {
1601
1602 case SERVICE_STOP_SIGABRT:
1603 return KILL_ABORT;
1604
1605 case SERVICE_STOP_SIGTERM:
1606 case SERVICE_FINAL_SIGTERM:
1607 return KILL_TERMINATE;
1608
1609 case SERVICE_STOP_SIGKILL:
1610 case SERVICE_FINAL_SIGKILL:
1611 return KILL_KILL;
1612
1613 default:
1614 return _KILL_OPERATION_INVALID;
1615 }
1616 }
1617
1618 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1619 int r;
1620
1621 assert(s);
1622
1623 if (s->result == SERVICE_SUCCESS)
1624 s->result = f;
1625
1626 unit_watch_all_pids(UNIT(s));
1627
1628 r = unit_kill_context(
1629 UNIT(s),
1630 &s->kill_context,
1631 state_to_kill_operation(state),
1632 s->main_pid,
1633 s->control_pid,
1634 s->main_pid_alien);
1635 if (r < 0)
1636 goto fail;
1637
1638 if (r > 0) {
1639 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1640 if (r < 0)
1641 goto fail;
1642
1643 service_set_state(s, state);
1644 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1645 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1646 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1647 service_enter_stop_post(s, SERVICE_SUCCESS);
1648 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1649 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1650 else
1651 service_enter_dead(s, SERVICE_SUCCESS, true);
1652
1653 return;
1654
1655 fail:
1656 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1657
1658 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1659 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1660 else
1661 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1662 }
1663
1664 static void service_enter_stop_by_notify(Service *s) {
1665 assert(s);
1666
1667 unit_watch_all_pids(UNIT(s));
1668
1669 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1670
1671 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1672 service_set_state(s, SERVICE_STOP_SIGTERM);
1673 }
1674
1675 static void service_enter_stop(Service *s, ServiceResult f) {
1676 int r;
1677
1678 assert(s);
1679
1680 if (s->result == SERVICE_SUCCESS)
1681 s->result = f;
1682
1683 service_unwatch_control_pid(s);
1684 unit_watch_all_pids(UNIT(s));
1685
1686 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1687 if (s->control_command) {
1688 s->control_command_id = SERVICE_EXEC_STOP;
1689
1690 r = service_spawn(s,
1691 s->control_command,
1692 s->timeout_stop_usec,
1693 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1694 &s->control_pid);
1695 if (r < 0)
1696 goto fail;
1697
1698 service_set_state(s, SERVICE_STOP);
1699 } else
1700 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1701
1702 return;
1703
1704 fail:
1705 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1706 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1707 }
1708
1709 static bool service_good(Service *s) {
1710 int main_pid_ok;
1711 assert(s);
1712
1713 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1714 return false;
1715
1716 main_pid_ok = main_pid_good(s);
1717 if (main_pid_ok > 0) /* It's alive */
1718 return true;
1719 if (main_pid_ok == 0) /* It's dead */
1720 return false;
1721
1722 /* OK, we don't know anything about the main PID, maybe
1723 * because there is none. Let's check the control group
1724 * instead. */
1725
1726 return cgroup_good(s) != 0;
1727 }
1728
1729 static void service_enter_running(Service *s, ServiceResult f) {
1730 assert(s);
1731
1732 if (s->result == SERVICE_SUCCESS)
1733 s->result = f;
1734
1735 service_unwatch_control_pid(s);
1736
1737 if (service_good(s)) {
1738
1739 /* If there are any queued up sd_notify()
1740 * notifications, process them now */
1741 if (s->notify_state == NOTIFY_RELOADING)
1742 service_enter_reload_by_notify(s);
1743 else if (s->notify_state == NOTIFY_STOPPING)
1744 service_enter_stop_by_notify(s);
1745 else {
1746 service_set_state(s, SERVICE_RUNNING);
1747 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1748 }
1749
1750 } else if (f != SERVICE_SUCCESS)
1751 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
1752 else if (s->remain_after_exit)
1753 service_set_state(s, SERVICE_EXITED);
1754 else
1755 service_enter_stop(s, SERVICE_SUCCESS);
1756 }
1757
1758 static void service_enter_start_post(Service *s) {
1759 int r;
1760 assert(s);
1761
1762 service_unwatch_control_pid(s);
1763 service_reset_watchdog(s);
1764
1765 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1766 if (s->control_command) {
1767 s->control_command_id = SERVICE_EXEC_START_POST;
1768
1769 r = service_spawn(s,
1770 s->control_command,
1771 s->timeout_start_usec,
1772 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1773 &s->control_pid);
1774 if (r < 0)
1775 goto fail;
1776
1777 service_set_state(s, SERVICE_START_POST);
1778 } else
1779 service_enter_running(s, SERVICE_SUCCESS);
1780
1781 return;
1782
1783 fail:
1784 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1785 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1786 }
1787
1788 static void service_kill_control_processes(Service *s) {
1789 int r;
1790
1791 assert(s);
1792
1793 if (s->control_pid > 0) {
1794 r = kill_and_sigcont(s->control_pid, SIGKILL);
1795 if (r < 0) {
1796 _cleanup_free_ char *comm = NULL;
1797
1798 (void) get_process_comm(s->control_pid, &comm);
1799
1800 log_unit_debug_errno(UNIT(s), r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m",
1801 s->control_pid, strna(comm));
1802 }
1803 }
1804
1805 if (UNIT(s)->cgroup_path) {
1806 _cleanup_set_free_ Set *pid_set = NULL;
1807 char *p;
1808
1809 if (s->control_pid > 0) {
1810 r = set_make(&pid_set, PID_TO_PTR(s->control_pid), NULL);
1811 if (r < 0) {
1812 log_oom();
1813 return;
1814 }
1815 }
1816
1817 p = strjoina(UNIT(s)->cgroup_path, "/control");
1818 r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, pid_set, NULL, NULL);
1819 if (r < 0)
1820 log_unit_debug_errno(UNIT(s), r, "Failed to send SIGKILL to processes of control group %s: %m", p);
1821 }
1822 }
1823
1824 static void service_enter_start(Service *s) {
1825 ExecCommand *c;
1826 usec_t timeout;
1827 pid_t pid;
1828 int r;
1829
1830 assert(s);
1831
1832 service_unwatch_control_pid(s);
1833 service_unwatch_main_pid(s);
1834
1835 /* We want to ensure that nobody leaks processes from
1836 * START_PRE here, so let's go on a killing spree, People
1837 * should not spawn long running processes from START_PRE. */
1838 service_kill_control_processes(s);
1839
1840 if (s->type == SERVICE_FORKING) {
1841 s->control_command_id = SERVICE_EXEC_START;
1842 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1843
1844 s->main_command = NULL;
1845 } else {
1846 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1847 s->control_command = NULL;
1848
1849 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1850 }
1851
1852 if (!c) {
1853 if (s->type != SERVICE_ONESHOT) {
1854 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1855 * happen if the configuration changes at runtime. In this case, let's enter a failure
1856 * state. */
1857 log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m");
1858 r = -ENXIO;
1859 goto fail;
1860 }
1861
1862 service_enter_start_post(s);
1863 return;
1864 }
1865
1866 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1867 /* For simple + idle this is the main process. We don't apply any timeout here, but
1868 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1869 timeout = USEC_INFINITY;
1870 else
1871 timeout = s->timeout_start_usec;
1872
1873 r = service_spawn(s,
1874 c,
1875 timeout,
1876 EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1877 &pid);
1878 if (r < 0)
1879 goto fail;
1880
1881 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1882 /* For simple services we immediately start
1883 * the START_POST binaries. */
1884
1885 service_set_main_pid(s, pid);
1886 service_enter_start_post(s);
1887
1888 } else if (s->type == SERVICE_FORKING) {
1889
1890 /* For forking services we wait until the start
1891 * process exited. */
1892
1893 s->control_pid = pid;
1894 service_set_state(s, SERVICE_START);
1895
1896 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1897
1898 /* For oneshot services we wait until the start
1899 * process exited, too, but it is our main process. */
1900
1901 /* For D-Bus services we know the main pid right away,
1902 * but wait for the bus name to appear on the
1903 * bus. Notify services are similar. */
1904
1905 service_set_main_pid(s, pid);
1906 service_set_state(s, SERVICE_START);
1907 } else
1908 assert_not_reached("Unknown service type");
1909
1910 return;
1911
1912 fail:
1913 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1914 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1915 }
1916
1917 static void service_enter_start_pre(Service *s) {
1918 int r;
1919
1920 assert(s);
1921
1922 service_unwatch_control_pid(s);
1923
1924 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1925 if (s->control_command) {
1926 /* Before we start anything, let's clear up what might
1927 * be left from previous runs. */
1928 service_kill_control_processes(s);
1929
1930 s->control_command_id = SERVICE_EXEC_START_PRE;
1931
1932 r = service_spawn(s,
1933 s->control_command,
1934 s->timeout_start_usec,
1935 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1936 &s->control_pid);
1937 if (r < 0)
1938 goto fail;
1939
1940 service_set_state(s, SERVICE_START_PRE);
1941 } else
1942 service_enter_start(s);
1943
1944 return;
1945
1946 fail:
1947 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1948 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1949 }
1950
1951 static void service_enter_restart(Service *s) {
1952 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1953 int r;
1954
1955 assert(s);
1956
1957 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1958 /* Don't restart things if we are going down anyway */
1959 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1960
1961 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1962 if (r < 0)
1963 goto fail;
1964
1965 return;
1966 }
1967
1968 /* Any units that are bound to this service must also be
1969 * restarted. We use JOB_RESTART (instead of the more obvious
1970 * JOB_START) here so that those dependency jobs will be added
1971 * as well. */
1972 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1973 if (r < 0)
1974 goto fail;
1975
1976 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
1977 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
1978 * explicitly however via the usual "systemctl reset-failure" logic. */
1979 s->n_restarts ++;
1980 s->flush_n_restarts = false;
1981
1982 log_struct(LOG_INFO,
1983 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR,
1984 LOG_UNIT_ID(UNIT(s)),
1985 LOG_UNIT_INVOCATION_ID(UNIT(s)),
1986 LOG_UNIT_MESSAGE(UNIT(s), "Scheduled restart job, restart counter is at %u.", s->n_restarts),
1987 "N_RESTARTS=%u", s->n_restarts,
1988 NULL);
1989
1990 /* Notify clients about changed restart counter */
1991 unit_add_to_dbus_queue(UNIT(s));
1992
1993 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1994 * it will be canceled as part of the service_stop() call that
1995 * is executed as part of JOB_RESTART. */
1996
1997 return;
1998
1999 fail:
2000 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
2001 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2002 }
2003
2004 static void service_enter_reload_by_notify(Service *s) {
2005 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2006 int r;
2007
2008 assert(s);
2009
2010 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
2011 service_set_state(s, SERVICE_RELOAD);
2012
2013 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2014 r = manager_propagate_reload(UNIT(s)->manager, UNIT(s), JOB_FAIL, &error);
2015 if (r < 0)
2016 log_unit_warning(UNIT(s), "Failed to schedule propagation of reload: %s", bus_error_message(&error, -r));
2017 }
2018
2019 static void service_enter_reload(Service *s) {
2020 int r;
2021
2022 assert(s);
2023
2024 service_unwatch_control_pid(s);
2025 s->reload_result = SERVICE_SUCCESS;
2026
2027 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2028 if (s->control_command) {
2029 s->control_command_id = SERVICE_EXEC_RELOAD;
2030
2031 r = service_spawn(s,
2032 s->control_command,
2033 s->timeout_start_usec,
2034 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
2035 &s->control_pid);
2036 if (r < 0)
2037 goto fail;
2038
2039 service_set_state(s, SERVICE_RELOAD);
2040 } else
2041 service_enter_running(s, SERVICE_SUCCESS);
2042
2043 return;
2044
2045 fail:
2046 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
2047 s->reload_result = SERVICE_FAILURE_RESOURCES;
2048 service_enter_running(s, SERVICE_SUCCESS);
2049 }
2050
2051 static void service_run_next_control(Service *s) {
2052 usec_t timeout;
2053 int r;
2054
2055 assert(s);
2056 assert(s->control_command);
2057 assert(s->control_command->command_next);
2058
2059 assert(s->control_command_id != SERVICE_EXEC_START);
2060
2061 s->control_command = s->control_command->command_next;
2062 service_unwatch_control_pid(s);
2063
2064 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
2065 timeout = s->timeout_start_usec;
2066 else
2067 timeout = s->timeout_stop_usec;
2068
2069 r = service_spawn(s,
2070 s->control_command,
2071 timeout,
2072 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
2073 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
2074 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
2075 &s->control_pid);
2076 if (r < 0)
2077 goto fail;
2078
2079 return;
2080
2081 fail:
2082 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
2083
2084 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_STOP))
2085 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2086 else if (s->state == SERVICE_STOP_POST)
2087 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2088 else if (s->state == SERVICE_RELOAD) {
2089 s->reload_result = SERVICE_FAILURE_RESOURCES;
2090 service_enter_running(s, SERVICE_SUCCESS);
2091 } else
2092 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2093 }
2094
2095 static void service_run_next_main(Service *s) {
2096 pid_t pid;
2097 int r;
2098
2099 assert(s);
2100 assert(s->main_command);
2101 assert(s->main_command->command_next);
2102 assert(s->type == SERVICE_ONESHOT);
2103
2104 s->main_command = s->main_command->command_next;
2105 service_unwatch_main_pid(s);
2106
2107 r = service_spawn(s,
2108 s->main_command,
2109 s->timeout_start_usec,
2110 EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
2111 &pid);
2112 if (r < 0)
2113 goto fail;
2114
2115 service_set_main_pid(s, pid);
2116
2117 return;
2118
2119 fail:
2120 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
2121 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2122 }
2123
2124 static int service_start(Unit *u) {
2125 Service *s = SERVICE(u);
2126 int r;
2127
2128 assert(s);
2129
2130 /* We cannot fulfill this request right now, try again later
2131 * please! */
2132 if (IN_SET(s->state,
2133 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2134 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2135 return -EAGAIN;
2136
2137 /* Already on it! */
2138 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2139 return 0;
2140
2141 /* A service that will be restarted must be stopped first to
2142 * trigger BindsTo and/or OnFailure dependencies. If a user
2143 * does not want to wait for the holdoff time to elapse, the
2144 * service should be manually restarted, not started. We
2145 * simply return EAGAIN here, so that any start jobs stay
2146 * queued, and assume that the auto restart timer will
2147 * eventually trigger the restart. */
2148 if (s->state == SERVICE_AUTO_RESTART)
2149 return -EAGAIN;
2150
2151 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2152
2153 /* Make sure we don't enter a busy loop of some kind. */
2154 r = unit_start_limit_test(u);
2155 if (r < 0) {
2156 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2157 return r;
2158 }
2159
2160 r = unit_acquire_invocation_id(u);
2161 if (r < 0)
2162 return r;
2163
2164 s->result = SERVICE_SUCCESS;
2165 s->reload_result = SERVICE_SUCCESS;
2166 s->main_pid_known = false;
2167 s->main_pid_alien = false;
2168 s->forbid_restart = false;
2169 s->reset_accounting = true;
2170
2171 s->status_text = mfree(s->status_text);
2172 s->status_errno = 0;
2173
2174 s->notify_state = NOTIFY_UNKNOWN;
2175
2176 s->watchdog_override_enable = false;
2177 s->watchdog_override_usec = 0;
2178
2179 /* This is not an automatic restart? Flush the restart counter then */
2180 if (s->flush_n_restarts) {
2181 s->n_restarts = 0;
2182 s->flush_n_restarts = false;
2183 }
2184
2185 service_enter_start_pre(s);
2186 return 1;
2187 }
2188
2189 static int service_stop(Unit *u) {
2190 Service *s = SERVICE(u);
2191
2192 assert(s);
2193
2194 /* Don't create restart jobs from manual stops. */
2195 s->forbid_restart = true;
2196
2197 /* Already on it */
2198 if (IN_SET(s->state,
2199 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2200 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2201 return 0;
2202
2203 /* A restart will be scheduled or is in progress. */
2204 if (s->state == SERVICE_AUTO_RESTART) {
2205 service_set_state(s, SERVICE_DEAD);
2206 return 0;
2207 }
2208
2209 /* If there's already something running we go directly into
2210 * kill mode. */
2211 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2212 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2213 return 0;
2214 }
2215
2216 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2217
2218 service_enter_stop(s, SERVICE_SUCCESS);
2219 return 1;
2220 }
2221
2222 static int service_reload(Unit *u) {
2223 Service *s = SERVICE(u);
2224
2225 assert(s);
2226
2227 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2228
2229 service_enter_reload(s);
2230 return 1;
2231 }
2232
2233 _pure_ static bool service_can_reload(Unit *u) {
2234 Service *s = SERVICE(u);
2235
2236 assert(s);
2237
2238 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2239 }
2240
2241 static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) {
2242 Service *s = SERVICE(u);
2243 unsigned idx = 0;
2244 ExecCommand *first, *c;
2245
2246 assert(s);
2247
2248 first = s->exec_command[id];
2249
2250 /* Figure out where we are in the list by walking back to the beginning */
2251 for (c = current; c != first; c = c->command_prev)
2252 idx++;
2253
2254 return idx;
2255 }
2256
2257 static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) {
2258 Service *s = SERVICE(u);
2259 ServiceExecCommand id;
2260 unsigned idx;
2261 const char *type;
2262 char **arg;
2263 _cleanup_free_ char *args = NULL, *p = NULL;
2264 size_t allocated = 0, length = 0;
2265
2266 assert(s);
2267 assert(f);
2268
2269 if (!command)
2270 return 0;
2271
2272 if (command == s->control_command) {
2273 type = "control";
2274 id = s->control_command_id;
2275 } else {
2276 type = "main";
2277 id = SERVICE_EXEC_START;
2278 }
2279
2280 idx = service_exec_command_index(u, id, command);
2281
2282 STRV_FOREACH(arg, command->argv) {
2283 size_t n;
2284 _cleanup_free_ char *e = NULL;
2285
2286 e = xescape(*arg, WHITESPACE);
2287 if (!e)
2288 return -ENOMEM;
2289
2290 n = strlen(e);
2291 if (!GREEDY_REALLOC(args, allocated, length + 1 + n + 1))
2292 return -ENOMEM;
2293
2294 if (length > 0)
2295 args[length++] = ' ';
2296
2297 memcpy(args + length, e, n);
2298 length += n;
2299 }
2300
2301 if (!GREEDY_REALLOC(args, allocated, length + 1))
2302 return -ENOMEM;
2303 args[length++] = 0;
2304
2305 p = xescape(command->path, WHITESPACE);
2306 if (!p)
2307 return -ENOMEM;
2308
2309 fprintf(f, "%s-command=%s %u %s %s\n", type, service_exec_command_to_string(id), idx, p, args);
2310
2311 return 0;
2312 }
2313
2314 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2315 Service *s = SERVICE(u);
2316 ServiceFDStore *fs;
2317 int r;
2318
2319 assert(u);
2320 assert(f);
2321 assert(fds);
2322
2323 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2324 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2325 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2326
2327 if (s->control_pid > 0)
2328 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2329
2330 if (s->main_pid_known && s->main_pid > 0)
2331 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2332
2333 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2334 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2335 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2336
2337 unit_serialize_item_format(u, f, "n-restarts", "%u", s->n_restarts);
2338 unit_serialize_item(u, f, "flush-n-restarts", yes_no(s->flush_n_restarts));
2339
2340 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2341 if (r < 0)
2342 return r;
2343
2344 service_serialize_exec_command(u, f, s->control_command);
2345 service_serialize_exec_command(u, f, s->main_command);
2346
2347 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2348 if (r < 0)
2349 return r;
2350 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2351 if (r < 0)
2352 return r;
2353 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2354 if (r < 0)
2355 return r;
2356
2357 if (UNIT_ISSET(s->accept_socket)) {
2358 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2359 if (r < 0)
2360 return r;
2361 }
2362
2363 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2364 if (r < 0)
2365 return r;
2366
2367 LIST_FOREACH(fd_store, fs, s->fd_store) {
2368 _cleanup_free_ char *c = NULL;
2369 int copy;
2370
2371 copy = fdset_put_dup(fds, fs->fd);
2372 if (copy < 0)
2373 return copy;
2374
2375 c = cescape(fs->fdname);
2376
2377 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2378 }
2379
2380 if (s->main_exec_status.pid > 0) {
2381 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2382 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2383 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2384
2385 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2386 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2387 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2388 }
2389 }
2390
2391 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2392
2393 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2394
2395 if (s->watchdog_override_enable)
2396 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2397
2398 return 0;
2399 }
2400
2401 static int service_deserialize_exec_command(Unit *u, const char *key, const char *value) {
2402 Service *s = SERVICE(u);
2403 int r;
2404 unsigned idx = 0, i;
2405 bool control, found = false;
2406 ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID;
2407 ExecCommand *command = NULL;
2408 _cleanup_free_ char *path = NULL;
2409 _cleanup_strv_free_ char **argv = NULL;
2410
2411 enum ExecCommandState {
2412 STATE_EXEC_COMMAND_TYPE,
2413 STATE_EXEC_COMMAND_INDEX,
2414 STATE_EXEC_COMMAND_PATH,
2415 STATE_EXEC_COMMAND_ARGS,
2416 _STATE_EXEC_COMMAND_MAX,
2417 _STATE_EXEC_COMMAND_INVALID = -1,
2418 } state;
2419
2420 assert(s);
2421 assert(key);
2422 assert(value);
2423
2424 control = streq(key, "control-command");
2425
2426 state = STATE_EXEC_COMMAND_TYPE;
2427
2428 for (;;) {
2429 _cleanup_free_ char *arg = NULL;
2430
2431 r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE);
2432 if (r == 0)
2433 break;
2434 else if (r < 0)
2435 return r;
2436
2437 switch (state) {
2438 case STATE_EXEC_COMMAND_TYPE:
2439 id = service_exec_command_from_string(arg);
2440 if (id < 0)
2441 return -EINVAL;
2442
2443 state = STATE_EXEC_COMMAND_INDEX;
2444 break;
2445 case STATE_EXEC_COMMAND_INDEX:
2446 r = safe_atou(arg, &idx);
2447 if (r < 0)
2448 return -EINVAL;
2449
2450 state = STATE_EXEC_COMMAND_PATH;
2451 break;
2452 case STATE_EXEC_COMMAND_PATH:
2453 path = arg;
2454 arg = NULL;
2455 state = STATE_EXEC_COMMAND_ARGS;
2456
2457 if (!path_is_absolute(path))
2458 return -EINVAL;
2459 break;
2460 case STATE_EXEC_COMMAND_ARGS:
2461 r = strv_extend(&argv, arg);
2462 if (r < 0)
2463 return -ENOMEM;
2464 break;
2465 default:
2466 assert_not_reached("Unknown error at deserialization of exec command");
2467 break;
2468 }
2469 }
2470
2471 if (state != STATE_EXEC_COMMAND_ARGS)
2472 return -EINVAL;
2473
2474 /* Let's check whether exec command on given offset matches data that we just deserialized */
2475 for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) {
2476 if (i != idx)
2477 continue;
2478
2479 found = strv_equal(argv, command->argv) && streq(command->path, path);
2480 break;
2481 }
2482
2483 if (!found) {
2484 /* Command at the index we serialized is different, let's look for command that exactly
2485 * matches but is on different index. If there is no such command we will not resume execution. */
2486 for (command = s->exec_command[id]; command; command = command->command_next)
2487 if (strv_equal(command->argv, argv) && streq(command->path, path))
2488 break;
2489 }
2490
2491 if (command && control)
2492 s->control_command = command;
2493 else if (command)
2494 s->main_command = command;
2495 else
2496 log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2497
2498 return 0;
2499 }
2500
2501 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2502 Service *s = SERVICE(u);
2503 int r;
2504
2505 assert(u);
2506 assert(key);
2507 assert(value);
2508 assert(fds);
2509
2510 if (streq(key, "state")) {
2511 ServiceState state;
2512
2513 state = service_state_from_string(value);
2514 if (state < 0)
2515 log_unit_debug(u, "Failed to parse state value: %s", value);
2516 else
2517 s->deserialized_state = state;
2518 } else if (streq(key, "result")) {
2519 ServiceResult f;
2520
2521 f = service_result_from_string(value);
2522 if (f < 0)
2523 log_unit_debug(u, "Failed to parse result value: %s", value);
2524 else if (f != SERVICE_SUCCESS)
2525 s->result = f;
2526
2527 } else if (streq(key, "reload-result")) {
2528 ServiceResult f;
2529
2530 f = service_result_from_string(value);
2531 if (f < 0)
2532 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2533 else if (f != SERVICE_SUCCESS)
2534 s->reload_result = f;
2535
2536 } else if (streq(key, "control-pid")) {
2537 pid_t pid;
2538
2539 if (parse_pid(value, &pid) < 0)
2540 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2541 else
2542 s->control_pid = pid;
2543 } else if (streq(key, "main-pid")) {
2544 pid_t pid;
2545
2546 if (parse_pid(value, &pid) < 0)
2547 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2548 else {
2549 service_set_main_pid(s, pid);
2550 unit_watch_pid(UNIT(s), pid);
2551 }
2552 } else if (streq(key, "main-pid-known")) {
2553 int b;
2554
2555 b = parse_boolean(value);
2556 if (b < 0)
2557 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2558 else
2559 s->main_pid_known = b;
2560 } else if (streq(key, "bus-name-good")) {
2561 int b;
2562
2563 b = parse_boolean(value);
2564 if (b < 0)
2565 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2566 else
2567 s->bus_name_good = b;
2568 } else if (streq(key, "bus-name-owner")) {
2569 r = free_and_strdup(&s->bus_name_owner, value);
2570 if (r < 0)
2571 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2572 } else if (streq(key, "status-text")) {
2573 char *t;
2574
2575 r = cunescape(value, 0, &t);
2576 if (r < 0)
2577 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2578 else {
2579 free(s->status_text);
2580 s->status_text = t;
2581 }
2582
2583 } else if (streq(key, "accept-socket")) {
2584 Unit *socket;
2585
2586 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2587 if (r < 0)
2588 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2589 else {
2590 unit_ref_set(&s->accept_socket, socket);
2591 SOCKET(socket)->n_connections++;
2592 }
2593
2594 } else if (streq(key, "socket-fd")) {
2595 int fd;
2596
2597 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2598 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2599 else {
2600 asynchronous_close(s->socket_fd);
2601 s->socket_fd = fdset_remove(fds, fd);
2602 }
2603 } else if (streq(key, "fd-store-fd")) {
2604 const char *fdv;
2605 size_t pf;
2606 int fd;
2607
2608 pf = strcspn(value, WHITESPACE);
2609 fdv = strndupa(value, pf);
2610
2611 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2612 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2613 else {
2614 _cleanup_free_ char *t = NULL;
2615 const char *fdn;
2616
2617 fdn = value + pf;
2618 fdn += strspn(fdn, WHITESPACE);
2619 (void) cunescape(fdn, 0, &t);
2620
2621 r = service_add_fd_store(s, fd, t);
2622 if (r < 0)
2623 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2624 else
2625 fdset_remove(fds, fd);
2626 }
2627
2628 } else if (streq(key, "main-exec-status-pid")) {
2629 pid_t pid;
2630
2631 if (parse_pid(value, &pid) < 0)
2632 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2633 else
2634 s->main_exec_status.pid = pid;
2635 } else if (streq(key, "main-exec-status-code")) {
2636 int i;
2637
2638 if (safe_atoi(value, &i) < 0)
2639 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2640 else
2641 s->main_exec_status.code = i;
2642 } else if (streq(key, "main-exec-status-status")) {
2643 int i;
2644
2645 if (safe_atoi(value, &i) < 0)
2646 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2647 else
2648 s->main_exec_status.status = i;
2649 } else if (streq(key, "main-exec-status-start"))
2650 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2651 else if (streq(key, "main-exec-status-exit"))
2652 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2653 else if (streq(key, "watchdog-timestamp"))
2654 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2655 else if (streq(key, "forbid-restart")) {
2656 int b;
2657
2658 b = parse_boolean(value);
2659 if (b < 0)
2660 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2661 else
2662 s->forbid_restart = b;
2663 } else if (streq(key, "stdin-fd")) {
2664 int fd;
2665
2666 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2667 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2668 else {
2669 asynchronous_close(s->stdin_fd);
2670 s->stdin_fd = fdset_remove(fds, fd);
2671 s->exec_context.stdio_as_fds = true;
2672 }
2673 } else if (streq(key, "stdout-fd")) {
2674 int fd;
2675
2676 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2677 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2678 else {
2679 asynchronous_close(s->stdout_fd);
2680 s->stdout_fd = fdset_remove(fds, fd);
2681 s->exec_context.stdio_as_fds = true;
2682 }
2683 } else if (streq(key, "stderr-fd")) {
2684 int fd;
2685
2686 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2687 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2688 else {
2689 asynchronous_close(s->stderr_fd);
2690 s->stderr_fd = fdset_remove(fds, fd);
2691 s->exec_context.stdio_as_fds = true;
2692 }
2693 } else if (streq(key, "watchdog-override-usec")) {
2694 usec_t watchdog_override_usec;
2695 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2696 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2697 else {
2698 s->watchdog_override_enable = true;
2699 s->watchdog_override_usec = watchdog_override_usec;
2700 }
2701 } else if (STR_IN_SET(key, "main-command", "control-command")) {
2702 r = service_deserialize_exec_command(u, key, value);
2703 if (r < 0)
2704 log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value);
2705
2706 } else if (streq(key, "n-restarts")) {
2707 r = safe_atou(value, &s->n_restarts);
2708 if (r < 0)
2709 log_unit_debug_errno(u, r, "Failed to parse serialized restart counter '%s': %m", value);
2710
2711 } else if (streq(key, "flush-n-restarts")) {
2712 r = parse_boolean(value);
2713 if (r < 0)
2714 log_unit_debug_errno(u, r, "Failed to parse serialized flush restart counter setting '%s': %m", value);
2715 else
2716 s->flush_n_restarts = r;
2717 } else
2718 log_unit_debug(u, "Unknown serialization key: %s", key);
2719
2720 return 0;
2721 }
2722
2723 _pure_ static UnitActiveState service_active_state(Unit *u) {
2724 const UnitActiveState *table;
2725
2726 assert(u);
2727
2728 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2729
2730 return table[SERVICE(u)->state];
2731 }
2732
2733 static const char *service_sub_state_to_string(Unit *u) {
2734 assert(u);
2735
2736 return service_state_to_string(SERVICE(u)->state);
2737 }
2738
2739 static bool service_check_gc(Unit *u) {
2740 Service *s = SERVICE(u);
2741
2742 assert(s);
2743
2744 /* Never clean up services that still have a process around,
2745 * even if the service is formally dead. */
2746 if (cgroup_good(s) > 0 ||
2747 main_pid_good(s) > 0 ||
2748 control_pid_good(s) > 0)
2749 return true;
2750
2751 return false;
2752 }
2753
2754 static int service_retry_pid_file(Service *s) {
2755 int r;
2756
2757 assert(s->pid_file);
2758 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2759
2760 r = service_load_pid_file(s, false);
2761 if (r < 0)
2762 return r;
2763
2764 service_unwatch_pid_file(s);
2765
2766 service_enter_running(s, SERVICE_SUCCESS);
2767 return 0;
2768 }
2769
2770 static int service_watch_pid_file(Service *s) {
2771 int r;
2772
2773 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2774
2775 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2776 if (r < 0)
2777 goto fail;
2778
2779 /* the pidfile might have appeared just before we set the watch */
2780 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2781 service_retry_pid_file(s);
2782
2783 return 0;
2784 fail:
2785 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2786 service_unwatch_pid_file(s);
2787 return r;
2788 }
2789
2790 static int service_demand_pid_file(Service *s) {
2791 PathSpec *ps;
2792
2793 assert(s->pid_file);
2794 assert(!s->pid_file_pathspec);
2795
2796 ps = new0(PathSpec, 1);
2797 if (!ps)
2798 return -ENOMEM;
2799
2800 ps->unit = UNIT(s);
2801 ps->path = strdup(s->pid_file);
2802 if (!ps->path) {
2803 free(ps);
2804 return -ENOMEM;
2805 }
2806
2807 path_kill_slashes(ps->path);
2808
2809 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2810 * keep their PID file open all the time. */
2811 ps->type = PATH_MODIFIED;
2812 ps->inotify_fd = -1;
2813
2814 s->pid_file_pathspec = ps;
2815
2816 return service_watch_pid_file(s);
2817 }
2818
2819 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2820 PathSpec *p = userdata;
2821 Service *s;
2822
2823 assert(p);
2824
2825 s = SERVICE(p->unit);
2826
2827 assert(s);
2828 assert(fd >= 0);
2829 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2830 assert(s->pid_file_pathspec);
2831 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2832
2833 log_unit_debug(UNIT(s), "inotify event");
2834
2835 if (path_spec_fd_event(p, events) < 0)
2836 goto fail;
2837
2838 if (service_retry_pid_file(s) == 0)
2839 return 0;
2840
2841 if (service_watch_pid_file(s) < 0)
2842 goto fail;
2843
2844 return 0;
2845
2846 fail:
2847 service_unwatch_pid_file(s);
2848 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2849 return 0;
2850 }
2851
2852 static void service_notify_cgroup_empty_event(Unit *u) {
2853 Service *s = SERVICE(u);
2854
2855 assert(u);
2856
2857 log_unit_debug(u, "cgroup is empty");
2858
2859 switch (s->state) {
2860
2861 /* Waiting for SIGCHLD is usually more interesting,
2862 * because it includes return codes/signals. Which is
2863 * why we ignore the cgroup events for most cases,
2864 * except when we don't know pid which to expect the
2865 * SIGCHLD for. */
2866
2867 case SERVICE_START:
2868 if (s->type == SERVICE_NOTIFY) {
2869 /* No chance of getting a ready notification anymore */
2870 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2871 break;
2872 }
2873
2874 /* Fall through */
2875
2876 case SERVICE_START_POST:
2877 if (s->pid_file_pathspec) {
2878 /* Give up hoping for the daemon to write its PID file */
2879 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2880
2881 service_unwatch_pid_file(s);
2882 if (s->state == SERVICE_START)
2883 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2884 else
2885 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
2886 }
2887 break;
2888
2889 case SERVICE_RUNNING:
2890 /* service_enter_running() will figure out what to do */
2891 service_enter_running(s, SERVICE_SUCCESS);
2892 break;
2893
2894 case SERVICE_STOP_SIGABRT:
2895 case SERVICE_STOP_SIGTERM:
2896 case SERVICE_STOP_SIGKILL:
2897
2898 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2899 service_enter_stop_post(s, SERVICE_SUCCESS);
2900
2901 break;
2902
2903 case SERVICE_STOP_POST:
2904 case SERVICE_FINAL_SIGTERM:
2905 case SERVICE_FINAL_SIGKILL:
2906 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2907 service_enter_dead(s, SERVICE_SUCCESS, true);
2908
2909 break;
2910
2911 default:
2912 ;
2913 }
2914 }
2915
2916 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2917 Service *s = SERVICE(u);
2918 ServiceResult f;
2919
2920 assert(s);
2921 assert(pid >= 0);
2922
2923 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
2924 f = SERVICE_SUCCESS;
2925 else if (code == CLD_EXITED)
2926 f = SERVICE_FAILURE_EXIT_CODE;
2927 else if (code == CLD_KILLED)
2928 f = SERVICE_FAILURE_SIGNAL;
2929 else if (code == CLD_DUMPED)
2930 f = SERVICE_FAILURE_CORE_DUMP;
2931 else
2932 assert_not_reached("Unknown code");
2933
2934 if (s->main_pid == pid) {
2935 /* Forking services may occasionally move to a new PID.
2936 * As long as they update the PID file before exiting the old
2937 * PID, they're fine. */
2938 if (service_load_pid_file(s, false) == 0)
2939 return;
2940
2941 s->main_pid = 0;
2942 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2943
2944 if (s->main_command) {
2945 /* If this is not a forking service than the
2946 * main process got started and hence we copy
2947 * the exit status so that it is recorded both
2948 * as main and as control process exit
2949 * status */
2950
2951 s->main_command->exec_status = s->main_exec_status;
2952
2953 if (s->main_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
2954 f = SERVICE_SUCCESS;
2955 } else if (s->exec_command[SERVICE_EXEC_START]) {
2956
2957 /* If this is a forked process, then we should
2958 * ignore the return value if this was
2959 * configured for the starter process */
2960
2961 if (s->exec_command[SERVICE_EXEC_START]->flags & EXEC_COMMAND_IGNORE_FAILURE)
2962 f = SERVICE_SUCCESS;
2963 }
2964
2965 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
2966 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
2967 * that the service already logged the reason at a higher log level on its own. However, if the service
2968 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
2969 * our log level to WARNING then. */
2970
2971 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
2972 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
2973 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2974 sigchld_code_to_string(code), status,
2975 strna(code == CLD_EXITED
2976 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2977 : signal_to_string(status))),
2978 "EXIT_CODE=%s", sigchld_code_to_string(code),
2979 "EXIT_STATUS=%i", status,
2980 LOG_UNIT_ID(u),
2981 LOG_UNIT_INVOCATION_ID(u),
2982 NULL);
2983
2984 if (s->result == SERVICE_SUCCESS)
2985 s->result = f;
2986
2987 if (s->main_command &&
2988 s->main_command->command_next &&
2989 s->type == SERVICE_ONESHOT &&
2990 f == SERVICE_SUCCESS) {
2991
2992 /* There is another command to *
2993 * execute, so let's do that. */
2994
2995 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2996 service_run_next_main(s);
2997
2998 } else {
2999
3000 /* The service exited, so the service is officially
3001 * gone. */
3002 s->main_command = NULL;
3003
3004 switch (s->state) {
3005
3006 case SERVICE_START_POST:
3007 case SERVICE_RELOAD:
3008 case SERVICE_STOP:
3009 /* Need to wait until the operation is
3010 * done */
3011 break;
3012
3013 case SERVICE_START:
3014 if (s->type == SERVICE_ONESHOT) {
3015 /* This was our main goal, so let's go on */
3016 if (f == SERVICE_SUCCESS)
3017 service_enter_start_post(s);
3018 else
3019 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3020 break;
3021 } else if (s->type == SERVICE_NOTIFY) {
3022 /* Only enter running through a notification, so that the
3023 * SERVICE_START state signifies that no ready notification
3024 * has been received */
3025 if (f != SERVICE_SUCCESS)
3026 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3027 else if (!s->remain_after_exit)
3028 /* The service has never been active */
3029 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3030 break;
3031 }
3032
3033 /* Fall through */
3034
3035 case SERVICE_RUNNING:
3036 service_enter_running(s, f);
3037 break;
3038
3039 case SERVICE_STOP_SIGABRT:
3040 case SERVICE_STOP_SIGTERM:
3041 case SERVICE_STOP_SIGKILL:
3042
3043 if (!control_pid_good(s))
3044 service_enter_stop_post(s, f);
3045
3046 /* If there is still a control process, wait for that first */
3047 break;
3048
3049 case SERVICE_STOP_POST:
3050 case SERVICE_FINAL_SIGTERM:
3051 case SERVICE_FINAL_SIGKILL:
3052
3053 if (!control_pid_good(s))
3054 service_enter_dead(s, f, true);
3055 break;
3056
3057 default:
3058 assert_not_reached("Uh, main process died at wrong time.");
3059 }
3060 }
3061
3062 } else if (s->control_pid == pid) {
3063 s->control_pid = 0;
3064
3065 if (s->control_command) {
3066 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
3067
3068 if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
3069 f = SERVICE_SUCCESS;
3070 }
3071
3072 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
3073 "Control process exited, code=%s status=%i",
3074 sigchld_code_to_string(code), status);
3075
3076 if (s->result == SERVICE_SUCCESS)
3077 s->result = f;
3078
3079 /* Immediately get rid of the cgroup, so that the
3080 * kernel doesn't delay the cgroup empty messages for
3081 * the service cgroup any longer than necessary */
3082 service_kill_control_processes(s);
3083
3084 if (s->control_command &&
3085 s->control_command->command_next &&
3086 f == SERVICE_SUCCESS) {
3087
3088 /* There is another command to *
3089 * execute, so let's do that. */
3090
3091 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
3092 service_run_next_control(s);
3093
3094 } else {
3095 /* No further commands for this step, so let's
3096 * figure out what to do next */
3097
3098 s->control_command = NULL;
3099 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3100
3101 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
3102
3103 switch (s->state) {
3104
3105 case SERVICE_START_PRE:
3106 if (f == SERVICE_SUCCESS)
3107 service_enter_start(s);
3108 else
3109 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3110 break;
3111
3112 case SERVICE_START:
3113 if (s->type != SERVICE_FORKING)
3114 /* Maybe spurious event due to a reload that changed the type? */
3115 break;
3116
3117 if (f != SERVICE_SUCCESS) {
3118 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3119 break;
3120 }
3121
3122 if (s->pid_file) {
3123 bool has_start_post;
3124 int r;
3125
3126 /* Let's try to load the pid file here if we can.
3127 * The PID file might actually be created by a START_POST
3128 * script. In that case don't worry if the loading fails. */
3129
3130 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3131 r = service_load_pid_file(s, !has_start_post);
3132 if (!has_start_post && r < 0) {
3133 r = service_demand_pid_file(s);
3134 if (r < 0 || !cgroup_good(s))
3135 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3136 break;
3137 }
3138 } else
3139 service_search_main_pid(s);
3140
3141 service_enter_start_post(s);
3142 break;
3143
3144 case SERVICE_START_POST:
3145 if (f != SERVICE_SUCCESS) {
3146 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3147 break;
3148 }
3149
3150 if (s->pid_file) {
3151 int r;
3152
3153 r = service_load_pid_file(s, true);
3154 if (r < 0) {
3155 r = service_demand_pid_file(s);
3156 if (r < 0 || !cgroup_good(s))
3157 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
3158 break;
3159 }
3160 } else
3161 service_search_main_pid(s);
3162
3163 service_enter_running(s, SERVICE_SUCCESS);
3164 break;
3165
3166 case SERVICE_RELOAD:
3167 if (f == SERVICE_SUCCESS)
3168 if (service_load_pid_file(s, true) < 0)
3169 service_search_main_pid(s);
3170
3171 s->reload_result = f;
3172 service_enter_running(s, SERVICE_SUCCESS);
3173 break;
3174
3175 case SERVICE_STOP:
3176 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3177 break;
3178
3179 case SERVICE_STOP_SIGABRT:
3180 case SERVICE_STOP_SIGTERM:
3181 case SERVICE_STOP_SIGKILL:
3182 if (main_pid_good(s) <= 0)
3183 service_enter_stop_post(s, f);
3184
3185 /* If there is still a service
3186 * process around, wait until
3187 * that one quit, too */
3188 break;
3189
3190 case SERVICE_STOP_POST:
3191 case SERVICE_FINAL_SIGTERM:
3192 case SERVICE_FINAL_SIGKILL:
3193 if (main_pid_good(s) <= 0)
3194 service_enter_dead(s, f, true);
3195 break;
3196
3197 default:
3198 assert_not_reached("Uh, control process died at wrong time.");
3199 }
3200 }
3201 }
3202
3203 /* Notify clients about changed exit status */
3204 unit_add_to_dbus_queue(u);
3205
3206 /* We got one SIGCHLD for the service, let's watch all
3207 * processes that are now running of the service, and watch
3208 * that. Among the PIDs we then watch will be children
3209 * reassigned to us, which hopefully allows us to identify
3210 * when all children are gone */
3211 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3212 unit_watch_all_pids(u);
3213
3214 /* If the PID set is empty now, then let's finish this off
3215 (On unified we use proper notifications) */
3216 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) == 0 && set_isempty(u->pids))
3217 unit_add_to_cgroup_empty_queue(u);
3218 }
3219
3220 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3221 Service *s = SERVICE(userdata);
3222
3223 assert(s);
3224 assert(source == s->timer_event_source);
3225
3226 switch (s->state) {
3227
3228 case SERVICE_START_PRE:
3229 case SERVICE_START:
3230 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
3231 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3232 break;
3233
3234 case SERVICE_START_POST:
3235 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
3236 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3237 break;
3238
3239 case SERVICE_RUNNING:
3240 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
3241 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3242 break;
3243
3244 case SERVICE_RELOAD:
3245 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
3246 service_kill_control_processes(s);
3247 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3248 service_enter_running(s, SERVICE_SUCCESS);
3249 break;
3250
3251 case SERVICE_STOP:
3252 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
3253 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3254 break;
3255
3256 case SERVICE_STOP_SIGABRT:
3257 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
3258 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3259 break;
3260
3261 case SERVICE_STOP_SIGTERM:
3262 if (s->kill_context.send_sigkill) {
3263 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
3264 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3265 } else {
3266 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3267 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3268 }
3269
3270 break;
3271
3272 case SERVICE_STOP_SIGKILL:
3273 /* Uh, we sent a SIGKILL and it is still not gone?
3274 * Must be something we cannot kill, so let's just be
3275 * weirded out and continue */
3276
3277 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
3278 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3279 break;
3280
3281 case SERVICE_STOP_POST:
3282 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
3283 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3284 break;
3285
3286 case SERVICE_FINAL_SIGTERM:
3287 if (s->kill_context.send_sigkill) {
3288 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
3289 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3290 } else {
3291 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3292 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3293 }
3294
3295 break;
3296
3297 case SERVICE_FINAL_SIGKILL:
3298 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
3299 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3300 break;
3301
3302 case SERVICE_AUTO_RESTART:
3303 log_unit_info(UNIT(s),
3304 s->restart_usec > 0 ?
3305 "Service hold-off time over, scheduling restart." :
3306 "Service has no hold-off time, scheduling restart.");
3307 service_enter_restart(s);
3308 break;
3309
3310 default:
3311 assert_not_reached("Timeout at wrong time.");
3312 }
3313
3314 return 0;
3315 }
3316
3317 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3318 Service *s = SERVICE(userdata);
3319 char t[FORMAT_TIMESPAN_MAX];
3320 usec_t watchdog_usec;
3321
3322 assert(s);
3323 assert(source == s->watchdog_event_source);
3324
3325 watchdog_usec = service_get_watchdog_usec(s);
3326
3327 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3328 format_timespan(t, sizeof(t), watchdog_usec, 1));
3329
3330 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3331
3332 return 0;
3333 }
3334
3335 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
3336 Service *s = SERVICE(u);
3337 _cleanup_free_ char *cc = NULL;
3338 bool notify_dbus = false;
3339 const char *e;
3340
3341 assert(u);
3342
3343 cc = strv_join(tags, ", ");
3344
3345 if (s->notify_access == NOTIFY_NONE) {
3346 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3347 return;
3348 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3349 if (s->main_pid != 0)
3350 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3351 else
3352 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3353 return;
3354 } else if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) {
3355 if (s->main_pid != 0 && s->control_pid != 0)
3356 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,
3357 pid, s->main_pid, s->control_pid);
3358 else if (s->main_pid != 0)
3359 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3360 else if (s->control_pid != 0)
3361 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid);
3362 else
3363 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);
3364 return;
3365 } else
3366 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3367
3368 /* Interpret MAINPID= */
3369 e = strv_find_startswith(tags, "MAINPID=");
3370 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3371 if (parse_pid(e, &pid) < 0)
3372 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3373 else if (pid == s->control_pid)
3374 log_unit_warning(u, "A control process cannot also be the main process");
3375 else if (pid == getpid_cached() || pid == 1)
3376 log_unit_warning(u, "Service manager can't be main process, ignoring sd_notify() MAINPID= field");
3377 else {
3378 service_set_main_pid(s, pid);
3379 unit_watch_pid(UNIT(s), pid);
3380 notify_dbus = true;
3381 }
3382 }
3383
3384 /* Interpret RELOADING= */
3385 if (strv_find(tags, "RELOADING=1")) {
3386
3387 s->notify_state = NOTIFY_RELOADING;
3388
3389 if (s->state == SERVICE_RUNNING)
3390 service_enter_reload_by_notify(s);
3391
3392 notify_dbus = true;
3393 }
3394
3395 /* Interpret READY= */
3396 if (strv_find(tags, "READY=1")) {
3397
3398 s->notify_state = NOTIFY_READY;
3399
3400 /* Type=notify services inform us about completed
3401 * initialization with READY=1 */
3402 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3403 service_enter_start_post(s);
3404
3405 /* Sending READY=1 while we are reloading informs us
3406 * that the reloading is complete */
3407 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3408 service_enter_running(s, SERVICE_SUCCESS);
3409
3410 notify_dbus = true;
3411 }
3412
3413 /* Interpret STOPPING= */
3414 if (strv_find(tags, "STOPPING=1")) {
3415
3416 s->notify_state = NOTIFY_STOPPING;
3417
3418 if (s->state == SERVICE_RUNNING)
3419 service_enter_stop_by_notify(s);
3420
3421 notify_dbus = true;
3422 }
3423
3424 /* Interpret STATUS= */
3425 e = strv_find_startswith(tags, "STATUS=");
3426 if (e) {
3427 _cleanup_free_ char *t = NULL;
3428
3429 if (!isempty(e)) {
3430 if (!utf8_is_valid(e))
3431 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3432 else {
3433 t = strdup(e);
3434 if (!t)
3435 log_oom();
3436 }
3437 }
3438
3439 if (!streq_ptr(s->status_text, t)) {
3440 free_and_replace(s->status_text, t);
3441 notify_dbus = true;
3442 }
3443 }
3444
3445 /* Interpret ERRNO= */
3446 e = strv_find_startswith(tags, "ERRNO=");
3447 if (e) {
3448 int status_errno;
3449
3450 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3451 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3452 else {
3453 if (s->status_errno != status_errno) {
3454 s->status_errno = status_errno;
3455 notify_dbus = true;
3456 }
3457 }
3458 }
3459
3460 /* Interpret WATCHDOG= */
3461 if (strv_find(tags, "WATCHDOG=1"))
3462 service_reset_watchdog(s);
3463
3464 if (strv_find(tags, "FDSTORE=1")) {
3465 const char *name;
3466
3467 name = strv_find_startswith(tags, "FDNAME=");
3468 if (name && !fdname_is_valid(name)) {
3469 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3470 name = NULL;
3471 }
3472
3473 service_add_fd_store_set(s, fds, name);
3474 }
3475
3476 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3477 if (e) {
3478 usec_t watchdog_override_usec;
3479 if (safe_atou64(e, &watchdog_override_usec) < 0)
3480 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3481 else
3482 service_reset_watchdog_timeout(s, watchdog_override_usec);
3483 }
3484
3485 /* Notify clients about changed status or main pid */
3486 if (notify_dbus)
3487 unit_add_to_dbus_queue(u);
3488 }
3489
3490 static int service_get_timeout(Unit *u, usec_t *timeout) {
3491 Service *s = SERVICE(u);
3492 uint64_t t;
3493 int r;
3494
3495 if (!s->timer_event_source)
3496 return 0;
3497
3498 r = sd_event_source_get_time(s->timer_event_source, &t);
3499 if (r < 0)
3500 return r;
3501 if (t == USEC_INFINITY)
3502 return 0;
3503
3504 *timeout = t;
3505 return 1;
3506 }
3507
3508 static void service_bus_name_owner_change(
3509 Unit *u,
3510 const char *name,
3511 const char *old_owner,
3512 const char *new_owner) {
3513
3514 Service *s = SERVICE(u);
3515 int r;
3516
3517 assert(s);
3518 assert(name);
3519
3520 assert(streq(s->bus_name, name));
3521 assert(old_owner || new_owner);
3522
3523 if (old_owner && new_owner)
3524 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3525 else if (old_owner)
3526 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3527 else
3528 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3529
3530 s->bus_name_good = !!new_owner;
3531
3532 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3533 r = free_and_strdup(&s->bus_name_owner, new_owner);
3534 if (r < 0) {
3535 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3536 return;
3537 }
3538
3539 if (s->type == SERVICE_DBUS) {
3540
3541 /* service_enter_running() will figure out what to
3542 * do */
3543 if (s->state == SERVICE_RUNNING)
3544 service_enter_running(s, SERVICE_SUCCESS);
3545 else if (s->state == SERVICE_START && new_owner)
3546 service_enter_start_post(s);
3547
3548 } else if (new_owner &&
3549 s->main_pid <= 0 &&
3550 IN_SET(s->state,
3551 SERVICE_START,
3552 SERVICE_START_POST,
3553 SERVICE_RUNNING,
3554 SERVICE_RELOAD)) {
3555
3556 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3557 pid_t pid;
3558
3559 /* Try to acquire PID from bus service */
3560
3561 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3562 if (r >= 0)
3563 r = sd_bus_creds_get_pid(creds, &pid);
3564 if (r >= 0) {
3565 log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, name, pid);
3566
3567 service_set_main_pid(s, pid);
3568 unit_watch_pid(UNIT(s), pid);
3569 }
3570 }
3571 }
3572
3573 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3574 _cleanup_free_ char *peer = NULL;
3575 int r;
3576
3577 assert(s);
3578 assert(fd >= 0);
3579
3580 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3581 * to be configured. We take ownership of the passed fd on success. */
3582
3583 if (UNIT(s)->load_state != UNIT_LOADED)
3584 return -EINVAL;
3585
3586 if (s->socket_fd >= 0)
3587 return -EBUSY;
3588
3589 if (s->state != SERVICE_DEAD)
3590 return -EAGAIN;
3591
3592 if (getpeername_pretty(fd, true, &peer) >= 0) {
3593
3594 if (UNIT(s)->description) {
3595 _cleanup_free_ char *a;
3596
3597 a = strjoin(UNIT(s)->description, " (", peer, ")");
3598 if (!a)
3599 return -ENOMEM;
3600
3601 r = unit_set_description(UNIT(s), a);
3602 } else
3603 r = unit_set_description(UNIT(s), peer);
3604
3605 if (r < 0)
3606 return r;
3607 }
3608
3609 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3610 if (r < 0)
3611 return r;
3612
3613 s->socket_fd = fd;
3614 s->socket_fd_selinux_context_net = selinux_context_net;
3615
3616 unit_ref_set(&s->accept_socket, UNIT(sock));
3617 return 0;
3618 }
3619
3620 static void service_reset_failed(Unit *u) {
3621 Service *s = SERVICE(u);
3622
3623 assert(s);
3624
3625 if (s->state == SERVICE_FAILED)
3626 service_set_state(s, SERVICE_DEAD);
3627
3628 s->result = SERVICE_SUCCESS;
3629 s->reload_result = SERVICE_SUCCESS;
3630 s->n_restarts = 0;
3631 s->flush_n_restarts = false;
3632 }
3633
3634 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3635 Service *s = SERVICE(u);
3636
3637 assert(s);
3638
3639 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3640 }
3641
3642 static int service_main_pid(Unit *u) {
3643 Service *s = SERVICE(u);
3644
3645 assert(s);
3646
3647 return s->main_pid;
3648 }
3649
3650 static int service_control_pid(Unit *u) {
3651 Service *s = SERVICE(u);
3652
3653 assert(s);
3654
3655 return s->control_pid;
3656 }
3657
3658 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3659 [SERVICE_RESTART_NO] = "no",
3660 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3661 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3662 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3663 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3664 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3665 [SERVICE_RESTART_ALWAYS] = "always",
3666 };
3667
3668 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3669
3670 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3671 [SERVICE_SIMPLE] = "simple",
3672 [SERVICE_FORKING] = "forking",
3673 [SERVICE_ONESHOT] = "oneshot",
3674 [SERVICE_DBUS] = "dbus",
3675 [SERVICE_NOTIFY] = "notify",
3676 [SERVICE_IDLE] = "idle"
3677 };
3678
3679 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3680
3681 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3682 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3683 [SERVICE_EXEC_START] = "ExecStart",
3684 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3685 [SERVICE_EXEC_RELOAD] = "ExecReload",
3686 [SERVICE_EXEC_STOP] = "ExecStop",
3687 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3688 };
3689
3690 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3691
3692 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3693 [NOTIFY_UNKNOWN] = "unknown",
3694 [NOTIFY_READY] = "ready",
3695 [NOTIFY_RELOADING] = "reloading",
3696 [NOTIFY_STOPPING] = "stopping",
3697 };
3698
3699 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3700
3701 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3702 [SERVICE_SUCCESS] = "success",
3703 [SERVICE_FAILURE_RESOURCES] = "resources",
3704 [SERVICE_FAILURE_PROTOCOL] = "protocol",
3705 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3706 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3707 [SERVICE_FAILURE_SIGNAL] = "signal",
3708 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3709 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3710 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3711 };
3712
3713 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3714
3715 const UnitVTable service_vtable = {
3716 .object_size = sizeof(Service),
3717 .exec_context_offset = offsetof(Service, exec_context),
3718 .cgroup_context_offset = offsetof(Service, cgroup_context),
3719 .kill_context_offset = offsetof(Service, kill_context),
3720 .exec_runtime_offset = offsetof(Service, exec_runtime),
3721 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3722
3723 .sections =
3724 "Unit\0"
3725 "Service\0"
3726 "Install\0",
3727 .private_section = "Service",
3728
3729 .init = service_init,
3730 .done = service_done,
3731 .load = service_load,
3732 .release_resources = service_release_resources,
3733
3734 .coldplug = service_coldplug,
3735
3736 .dump = service_dump,
3737
3738 .start = service_start,
3739 .stop = service_stop,
3740 .reload = service_reload,
3741
3742 .can_reload = service_can_reload,
3743
3744 .kill = service_kill,
3745
3746 .serialize = service_serialize,
3747 .deserialize_item = service_deserialize_item,
3748
3749 .active_state = service_active_state,
3750 .sub_state_to_string = service_sub_state_to_string,
3751
3752 .check_gc = service_check_gc,
3753
3754 .sigchld_event = service_sigchld_event,
3755
3756 .reset_failed = service_reset_failed,
3757
3758 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3759 .notify_message = service_notify_message,
3760
3761 .main_pid = service_main_pid,
3762 .control_pid = service_control_pid,
3763
3764 .bus_name_owner_change = service_bus_name_owner_change,
3765
3766 .bus_vtable = bus_service_vtable,
3767 .bus_set_property = bus_service_set_property,
3768 .bus_commit_properties = bus_service_commit_properties,
3769
3770 .get_timeout = service_get_timeout,
3771 .can_transient = true,
3772
3773 .status_message_formats = {
3774 .starting_stopping = {
3775 [0] = "Starting %s...",
3776 [1] = "Stopping %s...",
3777 },
3778 .finished_start_job = {
3779 [JOB_DONE] = "Started %s.",
3780 [JOB_FAILED] = "Failed to start %s.",
3781 },
3782 .finished_stop_job = {
3783 [JOB_DONE] = "Stopped %s.",
3784 [JOB_FAILED] = "Stopped (with error) %s.",
3785 },
3786 },
3787 };
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