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[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 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1516
1517 if (s->result != SERVICE_SUCCESS) {
1518 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1519 emergency_action(UNIT(s)->manager, s->emergency_action, UNIT(s)->reboot_arg, "service failed");
1520 }
1521
1522 if (allow_restart && service_shall_restart(s)) {
1523
1524 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1525 if (r < 0)
1526 goto fail;
1527
1528 service_set_state(s, SERVICE_AUTO_RESTART);
1529 } else
1530 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1531 * user can still introspect the counter. Do so on the next start. */
1532 s->flush_n_restarts = true;
1533
1534 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1535 s->forbid_restart = false;
1536
1537 /* We want fresh tmpdirs in case service is started again immediately */
1538 exec_runtime_destroy(s->exec_runtime);
1539 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1540
1541 if (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_NO ||
1542 (s->exec_context.runtime_directory_preserve_mode == EXEC_PRESERVE_RESTART && !service_will_restart(s)))
1543 /* Also, remove the runtime directory */
1544 exec_context_destroy_runtime_directory(&s->exec_context, UNIT(s)->manager->prefix[EXEC_DIRECTORY_RUNTIME]);
1545
1546 /* Get rid of the IPC bits of the user */
1547 unit_unref_uid_gid(UNIT(s), true);
1548
1549 /* Release the user, and destroy it if we are the only remaining owner */
1550 dynamic_creds_destroy(&s->dynamic_creds);
1551
1552 /* Try to delete the pid file. At this point it will be
1553 * out-of-date, and some software might be confused by it, so
1554 * let's remove it. */
1555 if (s->pid_file)
1556 (void) unlink(s->pid_file);
1557
1558 return;
1559
1560 fail:
1561 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1562 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1563 }
1564
1565 static void service_enter_stop_post(Service *s, ServiceResult f) {
1566 int r;
1567 assert(s);
1568
1569 if (s->result == SERVICE_SUCCESS)
1570 s->result = f;
1571
1572 service_unwatch_control_pid(s);
1573 unit_watch_all_pids(UNIT(s));
1574
1575 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1576 if (s->control_command) {
1577 s->control_command_id = SERVICE_EXEC_STOP_POST;
1578
1579 r = service_spawn(s,
1580 s->control_command,
1581 s->timeout_stop_usec,
1582 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1583 &s->control_pid);
1584 if (r < 0)
1585 goto fail;
1586
1587 service_set_state(s, SERVICE_STOP_POST);
1588 } else
1589 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1590
1591 return;
1592
1593 fail:
1594 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1595 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1596 }
1597
1598 static int state_to_kill_operation(ServiceState state) {
1599 switch (state) {
1600
1601 case SERVICE_STOP_SIGABRT:
1602 return KILL_ABORT;
1603
1604 case SERVICE_STOP_SIGTERM:
1605 case SERVICE_FINAL_SIGTERM:
1606 return KILL_TERMINATE;
1607
1608 case SERVICE_STOP_SIGKILL:
1609 case SERVICE_FINAL_SIGKILL:
1610 return KILL_KILL;
1611
1612 default:
1613 return _KILL_OPERATION_INVALID;
1614 }
1615 }
1616
1617 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1618 int r;
1619
1620 assert(s);
1621
1622 if (s->result == SERVICE_SUCCESS)
1623 s->result = f;
1624
1625 unit_watch_all_pids(UNIT(s));
1626
1627 r = unit_kill_context(
1628 UNIT(s),
1629 &s->kill_context,
1630 state_to_kill_operation(state),
1631 s->main_pid,
1632 s->control_pid,
1633 s->main_pid_alien);
1634 if (r < 0)
1635 goto fail;
1636
1637 if (r > 0) {
1638 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1639 if (r < 0)
1640 goto fail;
1641
1642 service_set_state(s, state);
1643 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1644 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1645 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1646 service_enter_stop_post(s, SERVICE_SUCCESS);
1647 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1648 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1649 else
1650 service_enter_dead(s, SERVICE_SUCCESS, true);
1651
1652 return;
1653
1654 fail:
1655 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1656
1657 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1658 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1659 else
1660 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1661 }
1662
1663 static void service_enter_stop_by_notify(Service *s) {
1664 assert(s);
1665
1666 unit_watch_all_pids(UNIT(s));
1667
1668 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1669
1670 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1671 service_set_state(s, SERVICE_STOP_SIGTERM);
1672 }
1673
1674 static void service_enter_stop(Service *s, ServiceResult f) {
1675 int r;
1676
1677 assert(s);
1678
1679 if (s->result == SERVICE_SUCCESS)
1680 s->result = f;
1681
1682 service_unwatch_control_pid(s);
1683 unit_watch_all_pids(UNIT(s));
1684
1685 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1686 if (s->control_command) {
1687 s->control_command_id = SERVICE_EXEC_STOP;
1688
1689 r = service_spawn(s,
1690 s->control_command,
1691 s->timeout_stop_usec,
1692 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1693 &s->control_pid);
1694 if (r < 0)
1695 goto fail;
1696
1697 service_set_state(s, SERVICE_STOP);
1698 } else
1699 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1700
1701 return;
1702
1703 fail:
1704 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1705 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1706 }
1707
1708 static bool service_good(Service *s) {
1709 int main_pid_ok;
1710 assert(s);
1711
1712 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1713 return false;
1714
1715 main_pid_ok = main_pid_good(s);
1716 if (main_pid_ok > 0) /* It's alive */
1717 return true;
1718 if (main_pid_ok == 0) /* It's dead */
1719 return false;
1720
1721 /* OK, we don't know anything about the main PID, maybe
1722 * because there is none. Let's check the control group
1723 * instead. */
1724
1725 return cgroup_good(s) != 0;
1726 }
1727
1728 static void service_enter_running(Service *s, ServiceResult f) {
1729 assert(s);
1730
1731 if (s->result == SERVICE_SUCCESS)
1732 s->result = f;
1733
1734 service_unwatch_control_pid(s);
1735
1736 if (service_good(s)) {
1737
1738 /* If there are any queued up sd_notify()
1739 * notifications, process them now */
1740 if (s->notify_state == NOTIFY_RELOADING)
1741 service_enter_reload_by_notify(s);
1742 else if (s->notify_state == NOTIFY_STOPPING)
1743 service_enter_stop_by_notify(s);
1744 else {
1745 service_set_state(s, SERVICE_RUNNING);
1746 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1747 }
1748
1749 } else if (f != SERVICE_SUCCESS)
1750 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
1751 else if (s->remain_after_exit)
1752 service_set_state(s, SERVICE_EXITED);
1753 else
1754 service_enter_stop(s, SERVICE_SUCCESS);
1755 }
1756
1757 static void service_enter_start_post(Service *s) {
1758 int r;
1759 assert(s);
1760
1761 service_unwatch_control_pid(s);
1762 service_reset_watchdog(s);
1763
1764 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1765 if (s->control_command) {
1766 s->control_command_id = SERVICE_EXEC_START_POST;
1767
1768 r = service_spawn(s,
1769 s->control_command,
1770 s->timeout_start_usec,
1771 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1772 &s->control_pid);
1773 if (r < 0)
1774 goto fail;
1775
1776 service_set_state(s, SERVICE_START_POST);
1777 } else
1778 service_enter_running(s, SERVICE_SUCCESS);
1779
1780 return;
1781
1782 fail:
1783 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1784 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1785 }
1786
1787 static void service_kill_control_processes(Service *s) {
1788 int r;
1789
1790 assert(s);
1791
1792 if (s->control_pid > 0) {
1793 r = kill_and_sigcont(s->control_pid, SIGKILL);
1794 if (r < 0) {
1795 _cleanup_free_ char *comm = NULL;
1796
1797 (void) get_process_comm(s->control_pid, &comm);
1798
1799 log_unit_debug_errno(UNIT(s), r, "Failed to kill control process " PID_FMT " (%s), ignoring: %m",
1800 s->control_pid, strna(comm));
1801 }
1802 }
1803
1804 if (UNIT(s)->cgroup_path) {
1805 _cleanup_set_free_ Set *pid_set = NULL;
1806 char *p;
1807
1808 if (s->control_pid > 0) {
1809 r = set_make(&pid_set, PID_TO_PTR(s->control_pid), NULL);
1810 if (r < 0) {
1811 log_oom();
1812 return;
1813 }
1814 }
1815
1816 p = strjoina(UNIT(s)->cgroup_path, "/control");
1817 r = cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, pid_set, NULL, NULL);
1818 if (r < 0)
1819 log_unit_debug_errno(UNIT(s), r, "Failed to send SIGKILL to processes of control group %s: %m", p);
1820 }
1821 }
1822
1823 static void service_enter_start(Service *s) {
1824 ExecCommand *c;
1825 usec_t timeout;
1826 pid_t pid;
1827 int r;
1828
1829 assert(s);
1830
1831 service_unwatch_control_pid(s);
1832 service_unwatch_main_pid(s);
1833
1834 /* We want to ensure that nobody leaks processes from
1835 * START_PRE here, so let's go on a killing spree, People
1836 * should not spawn long running processes from START_PRE. */
1837 service_kill_control_processes(s);
1838
1839 if (s->type == SERVICE_FORKING) {
1840 s->control_command_id = SERVICE_EXEC_START;
1841 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1842
1843 s->main_command = NULL;
1844 } else {
1845 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1846 s->control_command = NULL;
1847
1848 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1849 }
1850
1851 if (!c) {
1852 if (s->type != SERVICE_ONESHOT) {
1853 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1854 * happen if the configuration changes at runtime. In this case, let's enter a failure
1855 * state. */
1856 log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m");
1857 r = -ENXIO;
1858 goto fail;
1859 }
1860
1861 service_enter_start_post(s);
1862 return;
1863 }
1864
1865 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1866 /* For simple + idle this is the main process. We don't apply any timeout here, but
1867 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1868 timeout = USEC_INFINITY;
1869 else
1870 timeout = s->timeout_start_usec;
1871
1872 r = service_spawn(s,
1873 c,
1874 timeout,
1875 EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1876 &pid);
1877 if (r < 0)
1878 goto fail;
1879
1880 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1881 /* For simple services we immediately start
1882 * the START_POST binaries. */
1883
1884 service_set_main_pid(s, pid);
1885 service_enter_start_post(s);
1886
1887 } else if (s->type == SERVICE_FORKING) {
1888
1889 /* For forking services we wait until the start
1890 * process exited. */
1891
1892 s->control_pid = pid;
1893 service_set_state(s, SERVICE_START);
1894
1895 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1896
1897 /* For oneshot services we wait until the start
1898 * process exited, too, but it is our main process. */
1899
1900 /* For D-Bus services we know the main pid right away,
1901 * but wait for the bus name to appear on the
1902 * bus. Notify services are similar. */
1903
1904 service_set_main_pid(s, pid);
1905 service_set_state(s, SERVICE_START);
1906 } else
1907 assert_not_reached("Unknown service type");
1908
1909 return;
1910
1911 fail:
1912 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1913 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1914 }
1915
1916 static void service_enter_start_pre(Service *s) {
1917 int r;
1918
1919 assert(s);
1920
1921 service_unwatch_control_pid(s);
1922
1923 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1924 if (s->control_command) {
1925 /* Before we start anything, let's clear up what might
1926 * be left from previous runs. */
1927 service_kill_control_processes(s);
1928
1929 s->control_command_id = SERVICE_EXEC_START_PRE;
1930
1931 r = service_spawn(s,
1932 s->control_command,
1933 s->timeout_start_usec,
1934 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1935 &s->control_pid);
1936 if (r < 0)
1937 goto fail;
1938
1939 service_set_state(s, SERVICE_START_PRE);
1940 } else
1941 service_enter_start(s);
1942
1943 return;
1944
1945 fail:
1946 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1947 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1948 }
1949
1950 static void service_enter_restart(Service *s) {
1951 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1952 int r;
1953
1954 assert(s);
1955
1956 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1957 /* Don't restart things if we are going down anyway */
1958 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1959
1960 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1961 if (r < 0)
1962 goto fail;
1963
1964 return;
1965 }
1966
1967 /* Any units that are bound to this service must also be
1968 * restarted. We use JOB_RESTART (instead of the more obvious
1969 * JOB_START) here so that those dependency jobs will be added
1970 * as well. */
1971 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1972 if (r < 0)
1973 goto fail;
1974
1975 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
1976 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
1977 * explicitly however via the usual "systemctl reset-failure" logic. */
1978 s->n_restarts ++;
1979 s->flush_n_restarts = false;
1980
1981 log_struct(LOG_INFO,
1982 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR,
1983 LOG_UNIT_ID(UNIT(s)),
1984 LOG_UNIT_INVOCATION_ID(UNIT(s)),
1985 LOG_UNIT_MESSAGE(UNIT(s), "Scheduled restart job, restart counter is at %u.", s->n_restarts),
1986 "N_RESTARTS=%u", s->n_restarts,
1987 NULL);
1988
1989 /* Notify clients about changed restart counter */
1990 unit_add_to_dbus_queue(UNIT(s));
1991
1992 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1993 * it will be canceled as part of the service_stop() call that
1994 * is executed as part of JOB_RESTART. */
1995
1996 return;
1997
1998 fail:
1999 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
2000 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2001 }
2002
2003 static void service_enter_reload_by_notify(Service *s) {
2004 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
2005 int r;
2006
2007 assert(s);
2008
2009 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
2010 service_set_state(s, SERVICE_RELOAD);
2011
2012 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2013 r = manager_propagate_reload(UNIT(s)->manager, UNIT(s), JOB_FAIL, &error);
2014 if (r < 0)
2015 log_unit_warning(UNIT(s), "Failed to schedule propagation of reload: %s", bus_error_message(&error, -r));
2016 }
2017
2018 static void service_enter_reload(Service *s) {
2019 int r;
2020
2021 assert(s);
2022
2023 service_unwatch_control_pid(s);
2024 s->reload_result = SERVICE_SUCCESS;
2025
2026 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2027 if (s->control_command) {
2028 s->control_command_id = SERVICE_EXEC_RELOAD;
2029
2030 r = service_spawn(s,
2031 s->control_command,
2032 s->timeout_start_usec,
2033 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
2034 &s->control_pid);
2035 if (r < 0)
2036 goto fail;
2037
2038 service_set_state(s, SERVICE_RELOAD);
2039 } else
2040 service_enter_running(s, SERVICE_SUCCESS);
2041
2042 return;
2043
2044 fail:
2045 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
2046 s->reload_result = SERVICE_FAILURE_RESOURCES;
2047 service_enter_running(s, SERVICE_SUCCESS);
2048 }
2049
2050 static void service_run_next_control(Service *s) {
2051 usec_t timeout;
2052 int r;
2053
2054 assert(s);
2055 assert(s->control_command);
2056 assert(s->control_command->command_next);
2057
2058 assert(s->control_command_id != SERVICE_EXEC_START);
2059
2060 s->control_command = s->control_command->command_next;
2061 service_unwatch_control_pid(s);
2062
2063 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
2064 timeout = s->timeout_start_usec;
2065 else
2066 timeout = s->timeout_stop_usec;
2067
2068 r = service_spawn(s,
2069 s->control_command,
2070 timeout,
2071 EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
2072 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
2073 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
2074 &s->control_pid);
2075 if (r < 0)
2076 goto fail;
2077
2078 return;
2079
2080 fail:
2081 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
2082
2083 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_STOP))
2084 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2085 else if (s->state == SERVICE_STOP_POST)
2086 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2087 else if (s->state == SERVICE_RELOAD) {
2088 s->reload_result = SERVICE_FAILURE_RESOURCES;
2089 service_enter_running(s, SERVICE_SUCCESS);
2090 } else
2091 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2092 }
2093
2094 static void service_run_next_main(Service *s) {
2095 pid_t pid;
2096 int r;
2097
2098 assert(s);
2099 assert(s->main_command);
2100 assert(s->main_command->command_next);
2101 assert(s->type == SERVICE_ONESHOT);
2102
2103 s->main_command = s->main_command->command_next;
2104 service_unwatch_main_pid(s);
2105
2106 r = service_spawn(s,
2107 s->main_command,
2108 s->timeout_start_usec,
2109 EXEC_PASS_FDS|EXEC_APPLY_SANDBOXING|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
2110 &pid);
2111 if (r < 0)
2112 goto fail;
2113
2114 service_set_main_pid(s, pid);
2115
2116 return;
2117
2118 fail:
2119 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
2120 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2121 }
2122
2123 static int service_start(Unit *u) {
2124 Service *s = SERVICE(u);
2125 int r;
2126
2127 assert(s);
2128
2129 /* We cannot fulfill this request right now, try again later
2130 * please! */
2131 if (IN_SET(s->state,
2132 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2133 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2134 return -EAGAIN;
2135
2136 /* Already on it! */
2137 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2138 return 0;
2139
2140 /* A service that will be restarted must be stopped first to
2141 * trigger BindsTo and/or OnFailure dependencies. If a user
2142 * does not want to wait for the holdoff time to elapse, the
2143 * service should be manually restarted, not started. We
2144 * simply return EAGAIN here, so that any start jobs stay
2145 * queued, and assume that the auto restart timer will
2146 * eventually trigger the restart. */
2147 if (s->state == SERVICE_AUTO_RESTART)
2148 return -EAGAIN;
2149
2150 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2151
2152 /* Make sure we don't enter a busy loop of some kind. */
2153 r = unit_start_limit_test(u);
2154 if (r < 0) {
2155 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2156 return r;
2157 }
2158
2159 r = unit_acquire_invocation_id(u);
2160 if (r < 0)
2161 return r;
2162
2163 s->result = SERVICE_SUCCESS;
2164 s->reload_result = SERVICE_SUCCESS;
2165 s->main_pid_known = false;
2166 s->main_pid_alien = false;
2167 s->forbid_restart = false;
2168 s->reset_accounting = true;
2169
2170 s->status_text = mfree(s->status_text);
2171 s->status_errno = 0;
2172
2173 s->notify_state = NOTIFY_UNKNOWN;
2174
2175 s->watchdog_override_enable = false;
2176 s->watchdog_override_usec = 0;
2177
2178 /* This is not an automatic restart? Flush the restart counter then */
2179 if (s->flush_n_restarts) {
2180 s->n_restarts = 0;
2181 s->flush_n_restarts = false;
2182 }
2183
2184 service_enter_start_pre(s);
2185 return 1;
2186 }
2187
2188 static int service_stop(Unit *u) {
2189 Service *s = SERVICE(u);
2190
2191 assert(s);
2192
2193 /* Don't create restart jobs from manual stops. */
2194 s->forbid_restart = true;
2195
2196 /* Already on it */
2197 if (IN_SET(s->state,
2198 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2199 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2200 return 0;
2201
2202 /* A restart will be scheduled or is in progress. */
2203 if (s->state == SERVICE_AUTO_RESTART) {
2204 service_set_state(s, SERVICE_DEAD);
2205 return 0;
2206 }
2207
2208 /* If there's already something running we go directly into
2209 * kill mode. */
2210 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2211 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2212 return 0;
2213 }
2214
2215 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2216
2217 service_enter_stop(s, SERVICE_SUCCESS);
2218 return 1;
2219 }
2220
2221 static int service_reload(Unit *u) {
2222 Service *s = SERVICE(u);
2223
2224 assert(s);
2225
2226 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2227
2228 service_enter_reload(s);
2229 return 1;
2230 }
2231
2232 _pure_ static bool service_can_reload(Unit *u) {
2233 Service *s = SERVICE(u);
2234
2235 assert(s);
2236
2237 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2238 }
2239
2240 static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) {
2241 Service *s = SERVICE(u);
2242 unsigned idx = 0;
2243 ExecCommand *first, *c;
2244
2245 assert(s);
2246
2247 first = s->exec_command[id];
2248
2249 /* Figure out where we are in the list by walking back to the beginning */
2250 for (c = current; c != first; c = c->command_prev)
2251 idx++;
2252
2253 return idx;
2254 }
2255
2256 static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) {
2257 Service *s = SERVICE(u);
2258 ServiceExecCommand id;
2259 unsigned idx;
2260 const char *type;
2261 char **arg;
2262 _cleanup_free_ char *args = NULL, *p = NULL;
2263 size_t allocated = 0, length = 0;
2264
2265 assert(s);
2266 assert(f);
2267
2268 if (!command)
2269 return 0;
2270
2271 if (command == s->control_command) {
2272 type = "control";
2273 id = s->control_command_id;
2274 } else {
2275 type = "main";
2276 id = SERVICE_EXEC_START;
2277 }
2278
2279 idx = service_exec_command_index(u, id, command);
2280
2281 STRV_FOREACH(arg, command->argv) {
2282 size_t n;
2283 _cleanup_free_ char *e = NULL;
2284
2285 e = xescape(*arg, WHITESPACE);
2286 if (!e)
2287 return -ENOMEM;
2288
2289 n = strlen(e);
2290 if (!GREEDY_REALLOC(args, allocated, length + 1 + n + 1))
2291 return -ENOMEM;
2292
2293 if (length > 0)
2294 args[length++] = ' ';
2295
2296 memcpy(args + length, e, n);
2297 length += n;
2298 }
2299
2300 if (!GREEDY_REALLOC(args, allocated, length + 1))
2301 return -ENOMEM;
2302 args[length++] = 0;
2303
2304 p = xescape(command->path, WHITESPACE);
2305 if (!p)
2306 return -ENOMEM;
2307
2308 fprintf(f, "%s-command=%s %u %s %s\n", type, service_exec_command_to_string(id), idx, p, args);
2309
2310 return 0;
2311 }
2312
2313 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2314 Service *s = SERVICE(u);
2315 ServiceFDStore *fs;
2316 int r;
2317
2318 assert(u);
2319 assert(f);
2320 assert(fds);
2321
2322 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2323 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2324 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2325
2326 if (s->control_pid > 0)
2327 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2328
2329 if (s->main_pid_known && s->main_pid > 0)
2330 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2331
2332 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2333 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2334 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2335
2336 unit_serialize_item_format(u, f, "n-restarts", "%u", s->n_restarts);
2337 unit_serialize_item(u, f, "flush-n-restarts", yes_no(s->flush_n_restarts));
2338
2339 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2340 if (r < 0)
2341 return r;
2342
2343 service_serialize_exec_command(u, f, s->control_command);
2344 service_serialize_exec_command(u, f, s->main_command);
2345
2346 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2347 if (r < 0)
2348 return r;
2349 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2350 if (r < 0)
2351 return r;
2352 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2353 if (r < 0)
2354 return r;
2355
2356 if (UNIT_ISSET(s->accept_socket)) {
2357 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2358 if (r < 0)
2359 return r;
2360 }
2361
2362 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2363 if (r < 0)
2364 return r;
2365
2366 LIST_FOREACH(fd_store, fs, s->fd_store) {
2367 _cleanup_free_ char *c = NULL;
2368 int copy;
2369
2370 copy = fdset_put_dup(fds, fs->fd);
2371 if (copy < 0)
2372 return copy;
2373
2374 c = cescape(fs->fdname);
2375
2376 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2377 }
2378
2379 if (s->main_exec_status.pid > 0) {
2380 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2381 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2382 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2383
2384 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2385 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2386 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2387 }
2388 }
2389
2390 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2391
2392 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2393
2394 if (s->watchdog_override_enable)
2395 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2396
2397 return 0;
2398 }
2399
2400 static int service_deserialize_exec_command(Unit *u, const char *key, const char *value) {
2401 Service *s = SERVICE(u);
2402 int r;
2403 unsigned idx = 0, i;
2404 bool control, found = false;
2405 ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID;
2406 ExecCommand *command = NULL;
2407 _cleanup_free_ char *path = NULL;
2408 _cleanup_strv_free_ char **argv = NULL;
2409
2410 enum ExecCommandState {
2411 STATE_EXEC_COMMAND_TYPE,
2412 STATE_EXEC_COMMAND_INDEX,
2413 STATE_EXEC_COMMAND_PATH,
2414 STATE_EXEC_COMMAND_ARGS,
2415 _STATE_EXEC_COMMAND_MAX,
2416 _STATE_EXEC_COMMAND_INVALID = -1,
2417 } state;
2418
2419 assert(s);
2420 assert(key);
2421 assert(value);
2422
2423 control = streq(key, "control-command");
2424
2425 state = STATE_EXEC_COMMAND_TYPE;
2426
2427 for (;;) {
2428 _cleanup_free_ char *arg = NULL;
2429
2430 r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE);
2431 if (r == 0)
2432 break;
2433 else if (r < 0)
2434 return r;
2435
2436 switch (state) {
2437 case STATE_EXEC_COMMAND_TYPE:
2438 id = service_exec_command_from_string(arg);
2439 if (id < 0)
2440 return -EINVAL;
2441
2442 state = STATE_EXEC_COMMAND_INDEX;
2443 break;
2444 case STATE_EXEC_COMMAND_INDEX:
2445 r = safe_atou(arg, &idx);
2446 if (r < 0)
2447 return -EINVAL;
2448
2449 state = STATE_EXEC_COMMAND_PATH;
2450 break;
2451 case STATE_EXEC_COMMAND_PATH:
2452 path = arg;
2453 arg = NULL;
2454 state = STATE_EXEC_COMMAND_ARGS;
2455
2456 if (!path_is_absolute(path))
2457 return -EINVAL;
2458 break;
2459 case STATE_EXEC_COMMAND_ARGS:
2460 r = strv_extend(&argv, arg);
2461 if (r < 0)
2462 return -ENOMEM;
2463 break;
2464 default:
2465 assert_not_reached("Unknown error at deserialization of exec command");
2466 break;
2467 }
2468 }
2469
2470 if (state != STATE_EXEC_COMMAND_ARGS)
2471 return -EINVAL;
2472
2473 /* Let's check whether exec command on given offset matches data that we just deserialized */
2474 for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) {
2475 if (i != idx)
2476 continue;
2477
2478 found = strv_equal(argv, command->argv) && streq(command->path, path);
2479 break;
2480 }
2481
2482 if (!found) {
2483 /* Command at the index we serialized is different, let's look for command that exactly
2484 * matches but is on different index. If there is no such command we will not resume execution. */
2485 for (command = s->exec_command[id]; command; command = command->command_next)
2486 if (strv_equal(command->argv, argv) && streq(command->path, path))
2487 break;
2488 }
2489
2490 if (command && control)
2491 s->control_command = command;
2492 else if (command)
2493 s->main_command = command;
2494 else
2495 log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2496
2497 return 0;
2498 }
2499
2500 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2501 Service *s = SERVICE(u);
2502 int r;
2503
2504 assert(u);
2505 assert(key);
2506 assert(value);
2507 assert(fds);
2508
2509 if (streq(key, "state")) {
2510 ServiceState state;
2511
2512 state = service_state_from_string(value);
2513 if (state < 0)
2514 log_unit_debug(u, "Failed to parse state value: %s", value);
2515 else
2516 s->deserialized_state = state;
2517 } else if (streq(key, "result")) {
2518 ServiceResult f;
2519
2520 f = service_result_from_string(value);
2521 if (f < 0)
2522 log_unit_debug(u, "Failed to parse result value: %s", value);
2523 else if (f != SERVICE_SUCCESS)
2524 s->result = f;
2525
2526 } else if (streq(key, "reload-result")) {
2527 ServiceResult f;
2528
2529 f = service_result_from_string(value);
2530 if (f < 0)
2531 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2532 else if (f != SERVICE_SUCCESS)
2533 s->reload_result = f;
2534
2535 } else if (streq(key, "control-pid")) {
2536 pid_t pid;
2537
2538 if (parse_pid(value, &pid) < 0)
2539 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2540 else
2541 s->control_pid = pid;
2542 } else if (streq(key, "main-pid")) {
2543 pid_t pid;
2544
2545 if (parse_pid(value, &pid) < 0)
2546 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2547 else {
2548 service_set_main_pid(s, pid);
2549 unit_watch_pid(UNIT(s), pid);
2550 }
2551 } else if (streq(key, "main-pid-known")) {
2552 int b;
2553
2554 b = parse_boolean(value);
2555 if (b < 0)
2556 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2557 else
2558 s->main_pid_known = b;
2559 } else if (streq(key, "bus-name-good")) {
2560 int b;
2561
2562 b = parse_boolean(value);
2563 if (b < 0)
2564 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2565 else
2566 s->bus_name_good = b;
2567 } else if (streq(key, "bus-name-owner")) {
2568 r = free_and_strdup(&s->bus_name_owner, value);
2569 if (r < 0)
2570 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2571 } else if (streq(key, "status-text")) {
2572 char *t;
2573
2574 r = cunescape(value, 0, &t);
2575 if (r < 0)
2576 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2577 else {
2578 free(s->status_text);
2579 s->status_text = t;
2580 }
2581
2582 } else if (streq(key, "accept-socket")) {
2583 Unit *socket;
2584
2585 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2586 if (r < 0)
2587 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2588 else {
2589 unit_ref_set(&s->accept_socket, socket);
2590 SOCKET(socket)->n_connections++;
2591 }
2592
2593 } else if (streq(key, "socket-fd")) {
2594 int fd;
2595
2596 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2597 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2598 else {
2599 asynchronous_close(s->socket_fd);
2600 s->socket_fd = fdset_remove(fds, fd);
2601 }
2602 } else if (streq(key, "fd-store-fd")) {
2603 const char *fdv;
2604 size_t pf;
2605 int fd;
2606
2607 pf = strcspn(value, WHITESPACE);
2608 fdv = strndupa(value, pf);
2609
2610 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2611 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2612 else {
2613 _cleanup_free_ char *t = NULL;
2614 const char *fdn;
2615
2616 fdn = value + pf;
2617 fdn += strspn(fdn, WHITESPACE);
2618 (void) cunescape(fdn, 0, &t);
2619
2620 r = service_add_fd_store(s, fd, t);
2621 if (r < 0)
2622 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2623 else
2624 fdset_remove(fds, fd);
2625 }
2626
2627 } else if (streq(key, "main-exec-status-pid")) {
2628 pid_t pid;
2629
2630 if (parse_pid(value, &pid) < 0)
2631 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2632 else
2633 s->main_exec_status.pid = pid;
2634 } else if (streq(key, "main-exec-status-code")) {
2635 int i;
2636
2637 if (safe_atoi(value, &i) < 0)
2638 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2639 else
2640 s->main_exec_status.code = i;
2641 } else if (streq(key, "main-exec-status-status")) {
2642 int i;
2643
2644 if (safe_atoi(value, &i) < 0)
2645 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2646 else
2647 s->main_exec_status.status = i;
2648 } else if (streq(key, "main-exec-status-start"))
2649 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2650 else if (streq(key, "main-exec-status-exit"))
2651 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2652 else if (streq(key, "watchdog-timestamp"))
2653 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2654 else if (streq(key, "forbid-restart")) {
2655 int b;
2656
2657 b = parse_boolean(value);
2658 if (b < 0)
2659 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2660 else
2661 s->forbid_restart = b;
2662 } else if (streq(key, "stdin-fd")) {
2663 int fd;
2664
2665 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2666 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2667 else {
2668 asynchronous_close(s->stdin_fd);
2669 s->stdin_fd = fdset_remove(fds, fd);
2670 s->exec_context.stdio_as_fds = true;
2671 }
2672 } else if (streq(key, "stdout-fd")) {
2673 int fd;
2674
2675 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2676 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2677 else {
2678 asynchronous_close(s->stdout_fd);
2679 s->stdout_fd = fdset_remove(fds, fd);
2680 s->exec_context.stdio_as_fds = true;
2681 }
2682 } else if (streq(key, "stderr-fd")) {
2683 int fd;
2684
2685 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2686 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2687 else {
2688 asynchronous_close(s->stderr_fd);
2689 s->stderr_fd = fdset_remove(fds, fd);
2690 s->exec_context.stdio_as_fds = true;
2691 }
2692 } else if (streq(key, "watchdog-override-usec")) {
2693 usec_t watchdog_override_usec;
2694 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2695 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2696 else {
2697 s->watchdog_override_enable = true;
2698 s->watchdog_override_usec = watchdog_override_usec;
2699 }
2700 } else if (STR_IN_SET(key, "main-command", "control-command")) {
2701 r = service_deserialize_exec_command(u, key, value);
2702 if (r < 0)
2703 log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value);
2704
2705 } else if (streq(key, "n-restarts")) {
2706 r = safe_atou(value, &s->n_restarts);
2707 if (r < 0)
2708 log_unit_debug_errno(u, r, "Failed to parse serialized restart counter '%s': %m", value);
2709
2710 } else if (streq(key, "flush-n-restarts")) {
2711 r = parse_boolean(value);
2712 if (r < 0)
2713 log_unit_debug_errno(u, r, "Failed to parse serialized flush restart counter setting '%s': %m", value);
2714 else
2715 s->flush_n_restarts = r;
2716 } else
2717 log_unit_debug(u, "Unknown serialization key: %s", key);
2718
2719 return 0;
2720 }
2721
2722 _pure_ static UnitActiveState service_active_state(Unit *u) {
2723 const UnitActiveState *table;
2724
2725 assert(u);
2726
2727 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2728
2729 return table[SERVICE(u)->state];
2730 }
2731
2732 static const char *service_sub_state_to_string(Unit *u) {
2733 assert(u);
2734
2735 return service_state_to_string(SERVICE(u)->state);
2736 }
2737
2738 static bool service_check_gc(Unit *u) {
2739 Service *s = SERVICE(u);
2740
2741 assert(s);
2742
2743 /* Never clean up services that still have a process around,
2744 * even if the service is formally dead. */
2745 if (cgroup_good(s) > 0 ||
2746 main_pid_good(s) > 0 ||
2747 control_pid_good(s) > 0)
2748 return true;
2749
2750 return false;
2751 }
2752
2753 static int service_retry_pid_file(Service *s) {
2754 int r;
2755
2756 assert(s->pid_file);
2757 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2758
2759 r = service_load_pid_file(s, false);
2760 if (r < 0)
2761 return r;
2762
2763 service_unwatch_pid_file(s);
2764
2765 service_enter_running(s, SERVICE_SUCCESS);
2766 return 0;
2767 }
2768
2769 static int service_watch_pid_file(Service *s) {
2770 int r;
2771
2772 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2773
2774 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2775 if (r < 0)
2776 goto fail;
2777
2778 /* the pidfile might have appeared just before we set the watch */
2779 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2780 service_retry_pid_file(s);
2781
2782 return 0;
2783 fail:
2784 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2785 service_unwatch_pid_file(s);
2786 return r;
2787 }
2788
2789 static int service_demand_pid_file(Service *s) {
2790 PathSpec *ps;
2791
2792 assert(s->pid_file);
2793 assert(!s->pid_file_pathspec);
2794
2795 ps = new0(PathSpec, 1);
2796 if (!ps)
2797 return -ENOMEM;
2798
2799 ps->unit = UNIT(s);
2800 ps->path = strdup(s->pid_file);
2801 if (!ps->path) {
2802 free(ps);
2803 return -ENOMEM;
2804 }
2805
2806 path_kill_slashes(ps->path);
2807
2808 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2809 * keep their PID file open all the time. */
2810 ps->type = PATH_MODIFIED;
2811 ps->inotify_fd = -1;
2812
2813 s->pid_file_pathspec = ps;
2814
2815 return service_watch_pid_file(s);
2816 }
2817
2818 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2819 PathSpec *p = userdata;
2820 Service *s;
2821
2822 assert(p);
2823
2824 s = SERVICE(p->unit);
2825
2826 assert(s);
2827 assert(fd >= 0);
2828 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2829 assert(s->pid_file_pathspec);
2830 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2831
2832 log_unit_debug(UNIT(s), "inotify event");
2833
2834 if (path_spec_fd_event(p, events) < 0)
2835 goto fail;
2836
2837 if (service_retry_pid_file(s) == 0)
2838 return 0;
2839
2840 if (service_watch_pid_file(s) < 0)
2841 goto fail;
2842
2843 return 0;
2844
2845 fail:
2846 service_unwatch_pid_file(s);
2847 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2848 return 0;
2849 }
2850
2851 static void service_notify_cgroup_empty_event(Unit *u) {
2852 Service *s = SERVICE(u);
2853
2854 assert(u);
2855
2856 log_unit_debug(u, "cgroup is empty");
2857
2858 switch (s->state) {
2859
2860 /* Waiting for SIGCHLD is usually more interesting,
2861 * because it includes return codes/signals. Which is
2862 * why we ignore the cgroup events for most cases,
2863 * except when we don't know pid which to expect the
2864 * SIGCHLD for. */
2865
2866 case SERVICE_START:
2867 if (s->type == SERVICE_NOTIFY) {
2868 /* No chance of getting a ready notification anymore */
2869 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2870 break;
2871 }
2872
2873 /* Fall through */
2874
2875 case SERVICE_START_POST:
2876 if (s->pid_file_pathspec) {
2877 /* Give up hoping for the daemon to write its PID file */
2878 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2879
2880 service_unwatch_pid_file(s);
2881 if (s->state == SERVICE_START)
2882 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2883 else
2884 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
2885 }
2886 break;
2887
2888 case SERVICE_RUNNING:
2889 /* service_enter_running() will figure out what to do */
2890 service_enter_running(s, SERVICE_SUCCESS);
2891 break;
2892
2893 case SERVICE_STOP_SIGABRT:
2894 case SERVICE_STOP_SIGTERM:
2895 case SERVICE_STOP_SIGKILL:
2896
2897 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2898 service_enter_stop_post(s, SERVICE_SUCCESS);
2899
2900 break;
2901
2902 case SERVICE_STOP_POST:
2903 case SERVICE_FINAL_SIGTERM:
2904 case SERVICE_FINAL_SIGKILL:
2905 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2906 service_enter_dead(s, SERVICE_SUCCESS, true);
2907
2908 break;
2909
2910 default:
2911 ;
2912 }
2913 }
2914
2915 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2916 Service *s = SERVICE(u);
2917 ServiceResult f;
2918
2919 assert(s);
2920 assert(pid >= 0);
2921
2922 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
2923 f = SERVICE_SUCCESS;
2924 else if (code == CLD_EXITED)
2925 f = SERVICE_FAILURE_EXIT_CODE;
2926 else if (code == CLD_KILLED)
2927 f = SERVICE_FAILURE_SIGNAL;
2928 else if (code == CLD_DUMPED)
2929 f = SERVICE_FAILURE_CORE_DUMP;
2930 else
2931 assert_not_reached("Unknown code");
2932
2933 if (s->main_pid == pid) {
2934 /* Forking services may occasionally move to a new PID.
2935 * As long as they update the PID file before exiting the old
2936 * PID, they're fine. */
2937 if (service_load_pid_file(s, false) == 0)
2938 return;
2939
2940 s->main_pid = 0;
2941 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2942
2943 if (s->main_command) {
2944 /* If this is not a forking service than the
2945 * main process got started and hence we copy
2946 * the exit status so that it is recorded both
2947 * as main and as control process exit
2948 * status */
2949
2950 s->main_command->exec_status = s->main_exec_status;
2951
2952 if (s->main_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
2953 f = SERVICE_SUCCESS;
2954 } else if (s->exec_command[SERVICE_EXEC_START]) {
2955
2956 /* If this is a forked process, then we should
2957 * ignore the return value if this was
2958 * configured for the starter process */
2959
2960 if (s->exec_command[SERVICE_EXEC_START]->flags & EXEC_COMMAND_IGNORE_FAILURE)
2961 f = SERVICE_SUCCESS;
2962 }
2963
2964 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
2965 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
2966 * that the service already logged the reason at a higher log level on its own. However, if the service
2967 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
2968 * our log level to WARNING then. */
2969
2970 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
2971 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
2972 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2973 sigchld_code_to_string(code), status,
2974 strna(code == CLD_EXITED
2975 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2976 : signal_to_string(status))),
2977 "EXIT_CODE=%s", sigchld_code_to_string(code),
2978 "EXIT_STATUS=%i", status,
2979 LOG_UNIT_ID(u),
2980 LOG_UNIT_INVOCATION_ID(u),
2981 NULL);
2982
2983 if (s->result == SERVICE_SUCCESS)
2984 s->result = f;
2985
2986 if (s->main_command &&
2987 s->main_command->command_next &&
2988 s->type == SERVICE_ONESHOT &&
2989 f == SERVICE_SUCCESS) {
2990
2991 /* There is another command to *
2992 * execute, so let's do that. */
2993
2994 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2995 service_run_next_main(s);
2996
2997 } else {
2998
2999 /* The service exited, so the service is officially
3000 * gone. */
3001 s->main_command = NULL;
3002
3003 switch (s->state) {
3004
3005 case SERVICE_START_POST:
3006 case SERVICE_RELOAD:
3007 case SERVICE_STOP:
3008 /* Need to wait until the operation is
3009 * done */
3010 break;
3011
3012 case SERVICE_START:
3013 if (s->type == SERVICE_ONESHOT) {
3014 /* This was our main goal, so let's go on */
3015 if (f == SERVICE_SUCCESS)
3016 service_enter_start_post(s);
3017 else
3018 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3019 break;
3020 } else if (s->type == SERVICE_NOTIFY) {
3021 /* Only enter running through a notification, so that the
3022 * SERVICE_START state signifies that no ready notification
3023 * has been received */
3024 if (f != SERVICE_SUCCESS)
3025 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3026 else if (!s->remain_after_exit)
3027 /* The service has never been active */
3028 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3029 break;
3030 }
3031
3032 /* Fall through */
3033
3034 case SERVICE_RUNNING:
3035 service_enter_running(s, f);
3036 break;
3037
3038 case SERVICE_STOP_SIGABRT:
3039 case SERVICE_STOP_SIGTERM:
3040 case SERVICE_STOP_SIGKILL:
3041
3042 if (!control_pid_good(s))
3043 service_enter_stop_post(s, f);
3044
3045 /* If there is still a control process, wait for that first */
3046 break;
3047
3048 case SERVICE_STOP_POST:
3049 case SERVICE_FINAL_SIGTERM:
3050 case SERVICE_FINAL_SIGKILL:
3051
3052 if (!control_pid_good(s))
3053 service_enter_dead(s, f, true);
3054 break;
3055
3056 default:
3057 assert_not_reached("Uh, main process died at wrong time.");
3058 }
3059 }
3060
3061 } else if (s->control_pid == pid) {
3062 s->control_pid = 0;
3063
3064 if (s->control_command) {
3065 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
3066
3067 if (s->control_command->flags & EXEC_COMMAND_IGNORE_FAILURE)
3068 f = SERVICE_SUCCESS;
3069 }
3070
3071 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
3072 "Control process exited, code=%s status=%i",
3073 sigchld_code_to_string(code), status);
3074
3075 if (s->result == SERVICE_SUCCESS)
3076 s->result = f;
3077
3078 /* Immediately get rid of the cgroup, so that the
3079 * kernel doesn't delay the cgroup empty messages for
3080 * the service cgroup any longer than necessary */
3081 service_kill_control_processes(s);
3082
3083 if (s->control_command &&
3084 s->control_command->command_next &&
3085 f == SERVICE_SUCCESS) {
3086
3087 /* There is another command to *
3088 * execute, so let's do that. */
3089
3090 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
3091 service_run_next_control(s);
3092
3093 } else {
3094 /* No further commands for this step, so let's
3095 * figure out what to do next */
3096
3097 s->control_command = NULL;
3098 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3099
3100 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
3101
3102 switch (s->state) {
3103
3104 case SERVICE_START_PRE:
3105 if (f == SERVICE_SUCCESS)
3106 service_enter_start(s);
3107 else
3108 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3109 break;
3110
3111 case SERVICE_START:
3112 if (s->type != SERVICE_FORKING)
3113 /* Maybe spurious event due to a reload that changed the type? */
3114 break;
3115
3116 if (f != SERVICE_SUCCESS) {
3117 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3118 break;
3119 }
3120
3121 if (s->pid_file) {
3122 bool has_start_post;
3123 int r;
3124
3125 /* Let's try to load the pid file here if we can.
3126 * The PID file might actually be created by a START_POST
3127 * script. In that case don't worry if the loading fails. */
3128
3129 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3130 r = service_load_pid_file(s, !has_start_post);
3131 if (!has_start_post && r < 0) {
3132 r = service_demand_pid_file(s);
3133 if (r < 0 || !cgroup_good(s))
3134 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3135 break;
3136 }
3137 } else
3138 service_search_main_pid(s);
3139
3140 service_enter_start_post(s);
3141 break;
3142
3143 case SERVICE_START_POST:
3144 if (f != SERVICE_SUCCESS) {
3145 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3146 break;
3147 }
3148
3149 if (s->pid_file) {
3150 int r;
3151
3152 r = service_load_pid_file(s, true);
3153 if (r < 0) {
3154 r = service_demand_pid_file(s);
3155 if (r < 0 || !cgroup_good(s))
3156 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
3157 break;
3158 }
3159 } else
3160 service_search_main_pid(s);
3161
3162 service_enter_running(s, SERVICE_SUCCESS);
3163 break;
3164
3165 case SERVICE_RELOAD:
3166 if (f == SERVICE_SUCCESS)
3167 if (service_load_pid_file(s, true) < 0)
3168 service_search_main_pid(s);
3169
3170 s->reload_result = f;
3171 service_enter_running(s, SERVICE_SUCCESS);
3172 break;
3173
3174 case SERVICE_STOP:
3175 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3176 break;
3177
3178 case SERVICE_STOP_SIGABRT:
3179 case SERVICE_STOP_SIGTERM:
3180 case SERVICE_STOP_SIGKILL:
3181 if (main_pid_good(s) <= 0)
3182 service_enter_stop_post(s, f);
3183
3184 /* If there is still a service
3185 * process around, wait until
3186 * that one quit, too */
3187 break;
3188
3189 case SERVICE_STOP_POST:
3190 case SERVICE_FINAL_SIGTERM:
3191 case SERVICE_FINAL_SIGKILL:
3192 if (main_pid_good(s) <= 0)
3193 service_enter_dead(s, f, true);
3194 break;
3195
3196 default:
3197 assert_not_reached("Uh, control process died at wrong time.");
3198 }
3199 }
3200 }
3201
3202 /* Notify clients about changed exit status */
3203 unit_add_to_dbus_queue(u);
3204
3205 /* We got one SIGCHLD for the service, let's watch all
3206 * processes that are now running of the service, and watch
3207 * that. Among the PIDs we then watch will be children
3208 * reassigned to us, which hopefully allows us to identify
3209 * when all children are gone */
3210 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3211 unit_watch_all_pids(u);
3212
3213 /* If the PID set is empty now, then let's finish this off
3214 (On unified we use proper notifications) */
3215 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) == 0 && set_isempty(u->pids))
3216 unit_add_to_cgroup_empty_queue(u);
3217 }
3218
3219 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3220 Service *s = SERVICE(userdata);
3221
3222 assert(s);
3223 assert(source == s->timer_event_source);
3224
3225 switch (s->state) {
3226
3227 case SERVICE_START_PRE:
3228 case SERVICE_START:
3229 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
3230 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3231 break;
3232
3233 case SERVICE_START_POST:
3234 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
3235 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3236 break;
3237
3238 case SERVICE_RUNNING:
3239 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
3240 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3241 break;
3242
3243 case SERVICE_RELOAD:
3244 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
3245 service_kill_control_processes(s);
3246 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3247 service_enter_running(s, SERVICE_SUCCESS);
3248 break;
3249
3250 case SERVICE_STOP:
3251 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
3252 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3253 break;
3254
3255 case SERVICE_STOP_SIGABRT:
3256 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
3257 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3258 break;
3259
3260 case SERVICE_STOP_SIGTERM:
3261 if (s->kill_context.send_sigkill) {
3262 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
3263 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3264 } else {
3265 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3266 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3267 }
3268
3269 break;
3270
3271 case SERVICE_STOP_SIGKILL:
3272 /* Uh, we sent a SIGKILL and it is still not gone?
3273 * Must be something we cannot kill, so let's just be
3274 * weirded out and continue */
3275
3276 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
3277 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3278 break;
3279
3280 case SERVICE_STOP_POST:
3281 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
3282 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3283 break;
3284
3285 case SERVICE_FINAL_SIGTERM:
3286 if (s->kill_context.send_sigkill) {
3287 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
3288 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3289 } else {
3290 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3291 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3292 }
3293
3294 break;
3295
3296 case SERVICE_FINAL_SIGKILL:
3297 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
3298 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3299 break;
3300
3301 case SERVICE_AUTO_RESTART:
3302 log_unit_info(UNIT(s),
3303 s->restart_usec > 0 ?
3304 "Service hold-off time over, scheduling restart." :
3305 "Service has no hold-off time, scheduling restart.");
3306 service_enter_restart(s);
3307 break;
3308
3309 default:
3310 assert_not_reached("Timeout at wrong time.");
3311 }
3312
3313 return 0;
3314 }
3315
3316 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3317 Service *s = SERVICE(userdata);
3318 char t[FORMAT_TIMESPAN_MAX];
3319 usec_t watchdog_usec;
3320
3321 assert(s);
3322 assert(source == s->watchdog_event_source);
3323
3324 watchdog_usec = service_get_watchdog_usec(s);
3325
3326 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3327 format_timespan(t, sizeof(t), watchdog_usec, 1));
3328
3329 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3330
3331 return 0;
3332 }
3333
3334 static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
3335 Service *s = SERVICE(u);
3336 _cleanup_free_ char *cc = NULL;
3337 bool notify_dbus = false;
3338 const char *e;
3339
3340 assert(u);
3341
3342 cc = strv_join(tags, ", ");
3343
3344 if (s->notify_access == NOTIFY_NONE) {
3345 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3346 return;
3347 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3348 if (s->main_pid != 0)
3349 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3350 else
3351 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3352 return;
3353 } else if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) {
3354 if (s->main_pid != 0 && s->control_pid != 0)
3355 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,
3356 pid, s->main_pid, s->control_pid);
3357 else if (s->main_pid != 0)
3358 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3359 else if (s->control_pid != 0)
3360 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid);
3361 else
3362 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);
3363 return;
3364 } else
3365 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3366
3367 /* Interpret MAINPID= */
3368 e = strv_find_startswith(tags, "MAINPID=");
3369 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3370 if (parse_pid(e, &pid) < 0)
3371 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3372 else if (pid == s->control_pid)
3373 log_unit_warning(u, "A control process cannot also be the main process");
3374 else if (pid == getpid_cached() || pid == 1)
3375 log_unit_warning(u, "Service manager can't be main process, ignoring sd_notify() MAINPID= field");
3376 else {
3377 service_set_main_pid(s, pid);
3378 unit_watch_pid(UNIT(s), pid);
3379 notify_dbus = true;
3380 }
3381 }
3382
3383 /* Interpret RELOADING= */
3384 if (strv_find(tags, "RELOADING=1")) {
3385
3386 s->notify_state = NOTIFY_RELOADING;
3387
3388 if (s->state == SERVICE_RUNNING)
3389 service_enter_reload_by_notify(s);
3390
3391 notify_dbus = true;
3392 }
3393
3394 /* Interpret READY= */
3395 if (strv_find(tags, "READY=1")) {
3396
3397 s->notify_state = NOTIFY_READY;
3398
3399 /* Type=notify services inform us about completed
3400 * initialization with READY=1 */
3401 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3402 service_enter_start_post(s);
3403
3404 /* Sending READY=1 while we are reloading informs us
3405 * that the reloading is complete */
3406 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3407 service_enter_running(s, SERVICE_SUCCESS);
3408
3409 notify_dbus = true;
3410 }
3411
3412 /* Interpret STOPPING= */
3413 if (strv_find(tags, "STOPPING=1")) {
3414
3415 s->notify_state = NOTIFY_STOPPING;
3416
3417 if (s->state == SERVICE_RUNNING)
3418 service_enter_stop_by_notify(s);
3419
3420 notify_dbus = true;
3421 }
3422
3423 /* Interpret STATUS= */
3424 e = strv_find_startswith(tags, "STATUS=");
3425 if (e) {
3426 _cleanup_free_ char *t = NULL;
3427
3428 if (!isempty(e)) {
3429 if (!utf8_is_valid(e))
3430 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3431 else {
3432 t = strdup(e);
3433 if (!t)
3434 log_oom();
3435 }
3436 }
3437
3438 if (!streq_ptr(s->status_text, t)) {
3439 free_and_replace(s->status_text, t);
3440 notify_dbus = true;
3441 }
3442 }
3443
3444 /* Interpret ERRNO= */
3445 e = strv_find_startswith(tags, "ERRNO=");
3446 if (e) {
3447 int status_errno;
3448
3449 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3450 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3451 else {
3452 if (s->status_errno != status_errno) {
3453 s->status_errno = status_errno;
3454 notify_dbus = true;
3455 }
3456 }
3457 }
3458
3459 /* Interpret WATCHDOG= */
3460 if (strv_find(tags, "WATCHDOG=1"))
3461 service_reset_watchdog(s);
3462
3463 if (strv_find(tags, "FDSTORE=1")) {
3464 const char *name;
3465
3466 name = strv_find_startswith(tags, "FDNAME=");
3467 if (name && !fdname_is_valid(name)) {
3468 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3469 name = NULL;
3470 }
3471
3472 service_add_fd_store_set(s, fds, name);
3473 }
3474
3475 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3476 if (e) {
3477 usec_t watchdog_override_usec;
3478 if (safe_atou64(e, &watchdog_override_usec) < 0)
3479 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3480 else
3481 service_reset_watchdog_timeout(s, watchdog_override_usec);
3482 }
3483
3484 /* Notify clients about changed status or main pid */
3485 if (notify_dbus)
3486 unit_add_to_dbus_queue(u);
3487 }
3488
3489 static int service_get_timeout(Unit *u, usec_t *timeout) {
3490 Service *s = SERVICE(u);
3491 uint64_t t;
3492 int r;
3493
3494 if (!s->timer_event_source)
3495 return 0;
3496
3497 r = sd_event_source_get_time(s->timer_event_source, &t);
3498 if (r < 0)
3499 return r;
3500 if (t == USEC_INFINITY)
3501 return 0;
3502
3503 *timeout = t;
3504 return 1;
3505 }
3506
3507 static void service_bus_name_owner_change(
3508 Unit *u,
3509 const char *name,
3510 const char *old_owner,
3511 const char *new_owner) {
3512
3513 Service *s = SERVICE(u);
3514 int r;
3515
3516 assert(s);
3517 assert(name);
3518
3519 assert(streq(s->bus_name, name));
3520 assert(old_owner || new_owner);
3521
3522 if (old_owner && new_owner)
3523 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3524 else if (old_owner)
3525 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3526 else
3527 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3528
3529 s->bus_name_good = !!new_owner;
3530
3531 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3532 r = free_and_strdup(&s->bus_name_owner, new_owner);
3533 if (r < 0) {
3534 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3535 return;
3536 }
3537
3538 if (s->type == SERVICE_DBUS) {
3539
3540 /* service_enter_running() will figure out what to
3541 * do */
3542 if (s->state == SERVICE_RUNNING)
3543 service_enter_running(s, SERVICE_SUCCESS);
3544 else if (s->state == SERVICE_START && new_owner)
3545 service_enter_start_post(s);
3546
3547 } else if (new_owner &&
3548 s->main_pid <= 0 &&
3549 IN_SET(s->state,
3550 SERVICE_START,
3551 SERVICE_START_POST,
3552 SERVICE_RUNNING,
3553 SERVICE_RELOAD)) {
3554
3555 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3556 pid_t pid;
3557
3558 /* Try to acquire PID from bus service */
3559
3560 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3561 if (r >= 0)
3562 r = sd_bus_creds_get_pid(creds, &pid);
3563 if (r >= 0) {
3564 log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, name, pid);
3565
3566 service_set_main_pid(s, pid);
3567 unit_watch_pid(UNIT(s), pid);
3568 }
3569 }
3570 }
3571
3572 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3573 _cleanup_free_ char *peer = NULL;
3574 int r;
3575
3576 assert(s);
3577 assert(fd >= 0);
3578
3579 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3580 * to be configured. We take ownership of the passed fd on success. */
3581
3582 if (UNIT(s)->load_state != UNIT_LOADED)
3583 return -EINVAL;
3584
3585 if (s->socket_fd >= 0)
3586 return -EBUSY;
3587
3588 if (s->state != SERVICE_DEAD)
3589 return -EAGAIN;
3590
3591 if (getpeername_pretty(fd, true, &peer) >= 0) {
3592
3593 if (UNIT(s)->description) {
3594 _cleanup_free_ char *a;
3595
3596 a = strjoin(UNIT(s)->description, " (", peer, ")");
3597 if (!a)
3598 return -ENOMEM;
3599
3600 r = unit_set_description(UNIT(s), a);
3601 } else
3602 r = unit_set_description(UNIT(s), peer);
3603
3604 if (r < 0)
3605 return r;
3606 }
3607
3608 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3609 if (r < 0)
3610 return r;
3611
3612 s->socket_fd = fd;
3613 s->socket_fd_selinux_context_net = selinux_context_net;
3614
3615 unit_ref_set(&s->accept_socket, UNIT(sock));
3616 return 0;
3617 }
3618
3619 static void service_reset_failed(Unit *u) {
3620 Service *s = SERVICE(u);
3621
3622 assert(s);
3623
3624 if (s->state == SERVICE_FAILED)
3625 service_set_state(s, SERVICE_DEAD);
3626
3627 s->result = SERVICE_SUCCESS;
3628 s->reload_result = SERVICE_SUCCESS;
3629 s->n_restarts = 0;
3630 s->flush_n_restarts = false;
3631 }
3632
3633 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3634 Service *s = SERVICE(u);
3635
3636 assert(s);
3637
3638 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3639 }
3640
3641 static int service_main_pid(Unit *u) {
3642 Service *s = SERVICE(u);
3643
3644 assert(s);
3645
3646 return s->main_pid;
3647 }
3648
3649 static int service_control_pid(Unit *u) {
3650 Service *s = SERVICE(u);
3651
3652 assert(s);
3653
3654 return s->control_pid;
3655 }
3656
3657 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3658 [SERVICE_RESTART_NO] = "no",
3659 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3660 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3661 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3662 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3663 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3664 [SERVICE_RESTART_ALWAYS] = "always",
3665 };
3666
3667 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3668
3669 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3670 [SERVICE_SIMPLE] = "simple",
3671 [SERVICE_FORKING] = "forking",
3672 [SERVICE_ONESHOT] = "oneshot",
3673 [SERVICE_DBUS] = "dbus",
3674 [SERVICE_NOTIFY] = "notify",
3675 [SERVICE_IDLE] = "idle"
3676 };
3677
3678 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3679
3680 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3681 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3682 [SERVICE_EXEC_START] = "ExecStart",
3683 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3684 [SERVICE_EXEC_RELOAD] = "ExecReload",
3685 [SERVICE_EXEC_STOP] = "ExecStop",
3686 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3687 };
3688
3689 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3690
3691 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3692 [NOTIFY_UNKNOWN] = "unknown",
3693 [NOTIFY_READY] = "ready",
3694 [NOTIFY_RELOADING] = "reloading",
3695 [NOTIFY_STOPPING] = "stopping",
3696 };
3697
3698 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3699
3700 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3701 [SERVICE_SUCCESS] = "success",
3702 [SERVICE_FAILURE_RESOURCES] = "resources",
3703 [SERVICE_FAILURE_PROTOCOL] = "protocol",
3704 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3705 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3706 [SERVICE_FAILURE_SIGNAL] = "signal",
3707 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3708 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3709 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3710 };
3711
3712 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3713
3714 const UnitVTable service_vtable = {
3715 .object_size = sizeof(Service),
3716 .exec_context_offset = offsetof(Service, exec_context),
3717 .cgroup_context_offset = offsetof(Service, cgroup_context),
3718 .kill_context_offset = offsetof(Service, kill_context),
3719 .exec_runtime_offset = offsetof(Service, exec_runtime),
3720 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3721
3722 .sections =
3723 "Unit\0"
3724 "Service\0"
3725 "Install\0",
3726 .private_section = "Service",
3727
3728 .init = service_init,
3729 .done = service_done,
3730 .load = service_load,
3731 .release_resources = service_release_resources,
3732
3733 .coldplug = service_coldplug,
3734
3735 .dump = service_dump,
3736
3737 .start = service_start,
3738 .stop = service_stop,
3739 .reload = service_reload,
3740
3741 .can_reload = service_can_reload,
3742
3743 .kill = service_kill,
3744
3745 .serialize = service_serialize,
3746 .deserialize_item = service_deserialize_item,
3747
3748 .active_state = service_active_state,
3749 .sub_state_to_string = service_sub_state_to_string,
3750
3751 .check_gc = service_check_gc,
3752
3753 .sigchld_event = service_sigchld_event,
3754
3755 .reset_failed = service_reset_failed,
3756
3757 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3758 .notify_message = service_notify_message,
3759
3760 .main_pid = service_main_pid,
3761 .control_pid = service_control_pid,
3762
3763 .bus_name_owner_change = service_bus_name_owner_change,
3764
3765 .bus_vtable = bus_service_vtable,
3766 .bus_set_property = bus_service_set_property,
3767 .bus_commit_properties = bus_service_commit_properties,
3768
3769 .get_timeout = service_get_timeout,
3770 .can_transient = true,
3771
3772 .status_message_formats = {
3773 .starting_stopping = {
3774 [0] = "Starting %s...",
3775 [1] = "Stopping %s...",
3776 },
3777 .finished_start_job = {
3778 [JOB_DONE] = "Started %s.",
3779 [JOB_FAILED] = "Failed to start %s.",
3780 },
3781 .finished_stop_job = {
3782 [JOB_DONE] = "Stopped %s.",
3783 [JOB_FAILED] = "Stopped (with error) %s.",
3784 },
3785 },
3786 };
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