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service: timeout on SIGABRT should also be considered an error to remember
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1/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3/***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20***/
21
22#include <errno.h>
23#include <signal.h>
24#include <unistd.h>
25
26#include "async.h"
27#include "manager.h"
28#include "unit.h"
29#include "service.h"
30#include "load-fragment.h"
31#include "load-dropin.h"
32#include "log.h"
33#include "strv.h"
34#include "unit-name.h"
35#include "unit-printf.h"
36#include "dbus-service.h"
37#include "special.h"
38#include "exit-status.h"
39#include "def.h"
40#include "path-util.h"
41#include "util.h"
42#include "utf8.h"
43#include "env-util.h"
44#include "fileio.h"
45#include "bus-error.h"
46#include "bus-util.h"
47#include "bus-kernel.h"
48#include "formats-util.h"
49#include "process-util.h"
50
51static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
52 [SERVICE_DEAD] = UNIT_INACTIVE,
53 [SERVICE_START_PRE] = UNIT_ACTIVATING,
54 [SERVICE_START] = UNIT_ACTIVATING,
55 [SERVICE_START_POST] = UNIT_ACTIVATING,
56 [SERVICE_RUNNING] = UNIT_ACTIVE,
57 [SERVICE_EXITED] = UNIT_ACTIVE,
58 [SERVICE_RELOAD] = UNIT_RELOADING,
59 [SERVICE_STOP] = UNIT_DEACTIVATING,
60 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
61 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
62 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
63 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
64 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
65 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
66 [SERVICE_FAILED] = UNIT_FAILED,
67 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
68};
69
70/* For Type=idle we never want to delay any other jobs, hence we
71 * consider idle jobs active as soon as we start working on them */
72static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
73 [SERVICE_DEAD] = UNIT_INACTIVE,
74 [SERVICE_START_PRE] = UNIT_ACTIVE,
75 [SERVICE_START] = UNIT_ACTIVE,
76 [SERVICE_START_POST] = UNIT_ACTIVE,
77 [SERVICE_RUNNING] = UNIT_ACTIVE,
78 [SERVICE_EXITED] = UNIT_ACTIVE,
79 [SERVICE_RELOAD] = UNIT_RELOADING,
80 [SERVICE_STOP] = UNIT_DEACTIVATING,
81 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
82 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
83 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
84 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
85 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
86 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
87 [SERVICE_FAILED] = UNIT_FAILED,
88 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
89};
90
91static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
92static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
93static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
94
95static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
96static void service_enter_reload_by_notify(Service *s);
97
98static void service_init(Unit *u) {
99 Service *s = SERVICE(u);
100
101 assert(u);
102 assert(u->load_state == UNIT_STUB);
103
104 s->timeout_start_usec = u->manager->default_timeout_start_usec;
105 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
106 s->restart_usec = u->manager->default_restart_usec;
107 s->type = _SERVICE_TYPE_INVALID;
108 s->socket_fd = -1;
109 s->bus_endpoint_fd = -1;
110 s->guess_main_pid = true;
111
112 RATELIMIT_INIT(s->start_limit, u->manager->default_start_limit_interval, u->manager->default_start_limit_burst);
113
114 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
115}
116
117static void service_unwatch_control_pid(Service *s) {
118 assert(s);
119
120 if (s->control_pid <= 0)
121 return;
122
123 unit_unwatch_pid(UNIT(s), s->control_pid);
124 s->control_pid = 0;
125}
126
127static void service_unwatch_main_pid(Service *s) {
128 assert(s);
129
130 if (s->main_pid <= 0)
131 return;
132
133 unit_unwatch_pid(UNIT(s), s->main_pid);
134 s->main_pid = 0;
135}
136
137static void service_unwatch_pid_file(Service *s) {
138 if (!s->pid_file_pathspec)
139 return;
140
141 log_unit_debug(UNIT(s)->id, "Stopping watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
142 path_spec_unwatch(s->pid_file_pathspec);
143 path_spec_done(s->pid_file_pathspec);
144 free(s->pid_file_pathspec);
145 s->pid_file_pathspec = NULL;
146}
147
148static int service_set_main_pid(Service *s, pid_t pid) {
149 pid_t ppid;
150
151 assert(s);
152
153 if (pid <= 1)
154 return -EINVAL;
155
156 if (pid == getpid())
157 return -EINVAL;
158
159 if (s->main_pid == pid && s->main_pid_known)
160 return 0;
161
162 if (s->main_pid != pid) {
163 service_unwatch_main_pid(s);
164 exec_status_start(&s->main_exec_status, pid);
165 }
166
167 s->main_pid = pid;
168 s->main_pid_known = true;
169
170 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
171 log_unit_warning(UNIT(s)->id, "%s: Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", UNIT(s)->id, pid);
172 s->main_pid_alien = true;
173 } else
174 s->main_pid_alien = false;
175
176 return 0;
177}
178
179static void service_close_socket_fd(Service *s) {
180 assert(s);
181
182 s->socket_fd = asynchronous_close(s->socket_fd);
183}
184
185static void service_connection_unref(Service *s) {
186 assert(s);
187
188 if (!UNIT_ISSET(s->accept_socket))
189 return;
190
191 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
192 unit_ref_unset(&s->accept_socket);
193}
194
195static void service_stop_watchdog(Service *s) {
196 assert(s);
197
198 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
199 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
200}
201
202static void service_start_watchdog(Service *s) {
203 int r;
204
205 assert(s);
206
207 if (s->watchdog_usec <= 0)
208 return;
209
210 if (s->watchdog_event_source) {
211 r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
212 if (r < 0) {
213 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to reset watchdog timer: %m", UNIT(s)->id);
214 return;
215 }
216
217 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
218 } else {
219 r = sd_event_add_time(
220 UNIT(s)->manager->event,
221 &s->watchdog_event_source,
222 CLOCK_MONOTONIC,
223 s->watchdog_timestamp.monotonic + s->watchdog_usec, 0,
224 service_dispatch_watchdog, s);
225 if (r < 0) {
226 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to add watchdog timer: %m", UNIT(s)->id);
227 return;
228 }
229
230 /* Let's process everything else which might be a sign
231 * of living before we consider a service died. */
232 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
233 }
234
235 if (r < 0)
236 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to install watchdog timer: %m", UNIT(s)->id);
237}
238
239static void service_reset_watchdog(Service *s) {
240 assert(s);
241
242 dual_timestamp_get(&s->watchdog_timestamp);
243 service_start_watchdog(s);
244}
245
246static void service_fd_store_unlink(ServiceFDStore *fs) {
247
248 if (!fs)
249 return;
250
251 if (fs->service) {
252 assert(fs->service->n_fd_store > 0);
253 LIST_REMOVE(fd_store, fs->service->fd_store, fs);
254 fs->service->n_fd_store--;
255 }
256
257 if (fs->event_source) {
258 sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
259 sd_event_source_unref(fs->event_source);
260 }
261
262 safe_close(fs->fd);
263 free(fs);
264}
265
266static void service_release_resources(Unit *u) {
267 Service *s = SERVICE(u);
268
269 assert(s);
270
271 if (!s->fd_store)
272 return;
273
274 log_debug("Releasing all resources for %s", u->id);
275
276 while (s->fd_store)
277 service_fd_store_unlink(s->fd_store);
278
279 assert(s->n_fd_store == 0);
280}
281
282static void service_done(Unit *u) {
283 Service *s = SERVICE(u);
284
285 assert(s);
286
287 free(s->pid_file);
288 s->pid_file = NULL;
289
290 free(s->status_text);
291 s->status_text = NULL;
292
293 free(s->reboot_arg);
294 s->reboot_arg = NULL;
295
296 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
297 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
298 s->control_command = NULL;
299 s->main_command = NULL;
300
301 exit_status_set_free(&s->restart_prevent_status);
302 exit_status_set_free(&s->restart_force_status);
303 exit_status_set_free(&s->success_status);
304
305 /* This will leak a process, but at least no memory or any of
306 * our resources */
307 service_unwatch_main_pid(s);
308 service_unwatch_control_pid(s);
309 service_unwatch_pid_file(s);
310
311 if (s->bus_name) {
312 unit_unwatch_bus_name(u, s->bus_name);
313 free(s->bus_name);
314 s->bus_name = NULL;
315 }
316
317 s->bus_endpoint_fd = safe_close(s->bus_endpoint_fd);
318 service_close_socket_fd(s);
319 service_connection_unref(s);
320
321 unit_ref_unset(&s->accept_socket);
322
323 service_stop_watchdog(s);
324
325 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
326
327 service_release_resources(u);
328}
329
330static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
331 ServiceFDStore *fs = userdata;
332
333 assert(e);
334 assert(fs);
335
336 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
337 service_fd_store_unlink(fs);
338 return 0;
339}
340
341static int service_add_fd_store(Service *s, int fd) {
342 ServiceFDStore *fs;
343 int r;
344
345 assert(s);
346 assert(fd >= 0);
347
348 if (s->n_fd_store >= s->n_fd_store_max)
349 return 0;
350
351 LIST_FOREACH(fd_store, fs, s->fd_store) {
352 r = same_fd(fs->fd, fd);
353 if (r < 0)
354 return r;
355 if (r > 0) {
356 /* Already included */
357 safe_close(fd);
358 return 1;
359 }
360 }
361
362 fs = new0(ServiceFDStore, 1);
363 if (!fs)
364 return -ENOMEM;
365
366 fs->fd = fd;
367 fs->service = s;
368
369 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
370 if (r < 0) {
371 free(fs);
372 return r;
373 }
374
375 LIST_PREPEND(fd_store, s->fd_store, fs);
376 s->n_fd_store++;
377
378 return 1;
379}
380
381static int service_add_fd_store_set(Service *s, FDSet *fds) {
382 int r;
383
384 assert(s);
385
386 if (fdset_size(fds) <= 0)
387 return 0;
388
389 while (s->n_fd_store < s->n_fd_store_max) {
390 _cleanup_close_ int fd = -1;
391
392 fd = fdset_steal_first(fds);
393 if (fd < 0)
394 break;
395
396 r = service_add_fd_store(s, fd);
397 if (r < 0)
398 return log_unit_error_errno(UNIT(s)->id, r, "%s: Couldn't add fd to fd store: %m", UNIT(s)->id);
399
400 if (r > 0) {
401 log_unit_debug(UNIT(s)->id, "%s: added fd to fd store.", UNIT(s)->id);
402 fd = -1;
403 }
404 }
405
406 if (fdset_size(fds) > 0)
407 log_unit_warning(UNIT(s)->id, "%s: tried to store more fds than FDStoreMax=%u allows, closing remaining.", UNIT(s)->id, s->n_fd_store_max);
408
409 return 0;
410}
411
412static int service_arm_timer(Service *s, usec_t usec) {
413 int r;
414
415 assert(s);
416
417 if (s->timer_event_source) {
418 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
419 if (r < 0)
420 return r;
421
422 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
423 }
424
425 return sd_event_add_time(
426 UNIT(s)->manager->event,
427 &s->timer_event_source,
428 CLOCK_MONOTONIC,
429 now(CLOCK_MONOTONIC) + usec, 0,
430 service_dispatch_timer, s);
431}
432
433static int service_verify(Service *s) {
434 assert(s);
435
436 if (UNIT(s)->load_state != UNIT_LOADED)
437 return 0;
438
439 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
440 log_unit_error(UNIT(s)->id, "%s lacks both ExecStart= and ExecStop= setting. Refusing.", UNIT(s)->id);
441 return -EINVAL;
442 }
443
444 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
445 log_unit_error(UNIT(s)->id, "%s has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
446 return -EINVAL;
447 }
448
449 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
450 log_unit_error(UNIT(s)->id, "%s has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.", UNIT(s)->id);
451 return -EINVAL;
452 }
453
454 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
455 log_unit_error(UNIT(s)->id, "%s has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
456 return -EINVAL;
457 }
458
459 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
460 log_unit_error(UNIT(s)->id, "%s has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
461 return -EINVAL;
462 }
463
464 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
465 log_unit_error(UNIT(s)->id, "%s has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
466 return -EINVAL;
467 }
468
469 if (s->type == SERVICE_DBUS && !s->bus_name) {
470 log_unit_error(UNIT(s)->id, "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
471 return -EINVAL;
472 }
473
474 if (s->bus_name && s->type != SERVICE_DBUS)
475 log_unit_warning(UNIT(s)->id, "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
476
477 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
478 log_unit_error(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.", UNIT(s)->id);
479 return -EINVAL;
480 }
481
482 return 0;
483}
484
485static int service_add_default_dependencies(Service *s) {
486 int r;
487
488 assert(s);
489
490 /* Add a number of automatic dependencies useful for the
491 * majority of services. */
492
493 /* First, pull in base system */
494 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
495 if (r < 0)
496 return r;
497
498 /* Second, activate normal shutdown */
499 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
500}
501
502static void service_fix_output(Service *s) {
503 assert(s);
504
505 /* If nothing has been explicitly configured, patch default
506 * output in. If input is socket/tty we avoid this however,
507 * since in that case we want output to default to the same
508 * place as we read input from. */
509
510 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
511 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
512 s->exec_context.std_input == EXEC_INPUT_NULL)
513 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
514
515 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
516 s->exec_context.std_input == EXEC_INPUT_NULL)
517 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
518}
519
520static int service_add_extras(Service *s) {
521 int r;
522
523 assert(s);
524
525 if (s->type == _SERVICE_TYPE_INVALID) {
526 /* Figure out a type automatically */
527 if (s->bus_name)
528 s->type = SERVICE_DBUS;
529 else if (s->exec_command[SERVICE_EXEC_START])
530 s->type = SERVICE_SIMPLE;
531 else
532 s->type = SERVICE_ONESHOT;
533 }
534
535 /* Oneshot services have disabled start timeout by default */
536 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
537 s->timeout_start_usec = 0;
538
539 service_fix_output(s);
540
541 r = unit_patch_contexts(UNIT(s));
542 if (r < 0)
543 return r;
544
545 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
546 if (r < 0)
547 return r;
548
549 r = unit_add_default_slice(UNIT(s), &s->cgroup_context);
550 if (r < 0)
551 return r;
552
553 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
554 s->notify_access = NOTIFY_MAIN;
555
556 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
557 s->notify_access = NOTIFY_MAIN;
558
559 if (s->bus_name) {
560#ifdef ENABLE_KDBUS
561 const char *n;
562
563 n = strjoina(s->bus_name, ".busname");
564 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, n, NULL, true);
565 if (r < 0)
566 return r;
567#endif
568
569 r = unit_watch_bus_name(UNIT(s), s->bus_name);
570 if (r < 0)
571 return r;
572 }
573
574 if (UNIT(s)->default_dependencies) {
575 r = service_add_default_dependencies(s);
576 if (r < 0)
577 return r;
578 }
579
580 return 0;
581}
582
583static int service_load(Unit *u) {
584 Service *s = SERVICE(u);
585 int r;
586
587 assert(s);
588
589 /* Load a .service file */
590 r = unit_load_fragment(u);
591 if (r < 0)
592 return r;
593
594 /* Still nothing found? Then let's give up */
595 if (u->load_state == UNIT_STUB)
596 return -ENOENT;
597
598 /* This is a new unit? Then let's add in some extras */
599 if (u->load_state == UNIT_LOADED) {
600
601 /* We were able to load something, then let's add in
602 * the dropin directories. */
603 r = unit_load_dropin(u);
604 if (r < 0)
605 return r;
606
607 /* This is a new unit? Then let's add in some
608 * extras */
609 r = service_add_extras(s);
610 if (r < 0)
611 return r;
612 }
613
614 return service_verify(s);
615}
616
617static void service_dump(Unit *u, FILE *f, const char *prefix) {
618 ServiceExecCommand c;
619 Service *s = SERVICE(u);
620 const char *prefix2;
621
622 assert(s);
623
624 prefix = strempty(prefix);
625 prefix2 = strjoina(prefix, "\t");
626
627 fprintf(f,
628 "%sService State: %s\n"
629 "%sResult: %s\n"
630 "%sReload Result: %s\n"
631 "%sPermissionsStartOnly: %s\n"
632 "%sRootDirectoryStartOnly: %s\n"
633 "%sRemainAfterExit: %s\n"
634 "%sGuessMainPID: %s\n"
635 "%sType: %s\n"
636 "%sRestart: %s\n"
637 "%sNotifyAccess: %s\n"
638 "%sNotifyState: %s\n",
639 prefix, service_state_to_string(s->state),
640 prefix, service_result_to_string(s->result),
641 prefix, service_result_to_string(s->reload_result),
642 prefix, yes_no(s->permissions_start_only),
643 prefix, yes_no(s->root_directory_start_only),
644 prefix, yes_no(s->remain_after_exit),
645 prefix, yes_no(s->guess_main_pid),
646 prefix, service_type_to_string(s->type),
647 prefix, service_restart_to_string(s->restart),
648 prefix, notify_access_to_string(s->notify_access),
649 prefix, notify_state_to_string(s->notify_state));
650
651 if (s->control_pid > 0)
652 fprintf(f,
653 "%sControl PID: "PID_FMT"\n",
654 prefix, s->control_pid);
655
656 if (s->main_pid > 0)
657 fprintf(f,
658 "%sMain PID: "PID_FMT"\n"
659 "%sMain PID Known: %s\n"
660 "%sMain PID Alien: %s\n",
661 prefix, s->main_pid,
662 prefix, yes_no(s->main_pid_known),
663 prefix, yes_no(s->main_pid_alien));
664
665 if (s->pid_file)
666 fprintf(f,
667 "%sPIDFile: %s\n",
668 prefix, s->pid_file);
669
670 if (s->bus_name)
671 fprintf(f,
672 "%sBusName: %s\n"
673 "%sBus Name Good: %s\n",
674 prefix, s->bus_name,
675 prefix, yes_no(s->bus_name_good));
676
677 kill_context_dump(&s->kill_context, f, prefix);
678 exec_context_dump(&s->exec_context, f, prefix);
679
680 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
681
682 if (!s->exec_command[c])
683 continue;
684
685 fprintf(f, "%s-> %s:\n",
686 prefix, service_exec_command_to_string(c));
687
688 exec_command_dump_list(s->exec_command[c], f, prefix2);
689 }
690
691 if (s->status_text)
692 fprintf(f, "%sStatus Text: %s\n",
693 prefix, s->status_text);
694
695 if (s->n_fd_store_max > 0) {
696 fprintf(f,
697 "%sFile Descriptor Store Max: %u\n"
698 "%sFile Descriptor Store Current: %u\n",
699 prefix, s->n_fd_store_max,
700 prefix, s->n_fd_store);
701 }
702}
703
704static int service_load_pid_file(Service *s, bool may_warn) {
705 _cleanup_free_ char *k = NULL;
706 int r;
707 pid_t pid;
708
709 assert(s);
710
711 if (!s->pid_file)
712 return -ENOENT;
713
714 r = read_one_line_file(s->pid_file, &k);
715 if (r < 0) {
716 if (may_warn)
717 log_unit_info(UNIT(s)->id, "PID file %s not readable (yet?) after %s.", s->pid_file, service_state_to_string(s->state));
718 return r;
719 }
720
721 r = parse_pid(k, &pid);
722 if (r < 0) {
723 if (may_warn)
724 log_unit_info_errno(UNIT(s)->id, r, "Failed to read PID from file %s: %m", s->pid_file);
725 return r;
726 }
727
728 if (!pid_is_alive(pid)) {
729 if (may_warn)
730 log_unit_info(UNIT(s)->id, "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
731 return -ESRCH;
732 }
733
734 if (s->main_pid_known) {
735 if (pid == s->main_pid)
736 return 0;
737
738 log_unit_debug(UNIT(s)->id, "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
739
740 service_unwatch_main_pid(s);
741 s->main_pid_known = false;
742 } else
743 log_unit_debug(UNIT(s)->id, "Main PID loaded: "PID_FMT, pid);
744
745 r = service_set_main_pid(s, pid);
746 if (r < 0)
747 return r;
748
749 r = unit_watch_pid(UNIT(s), pid);
750 if (r < 0) {
751 /* FIXME: we need to do something here */
752 log_unit_warning(UNIT(s)->id, "Failed to watch PID "PID_FMT" from service %s", pid, UNIT(s)->id);
753 return r;
754 }
755
756 return 0;
757}
758
759static int service_search_main_pid(Service *s) {
760 pid_t pid;
761 int r;
762
763 assert(s);
764
765 /* If we know it anyway, don't ever fallback to unreliable
766 * heuristics */
767 if (s->main_pid_known)
768 return 0;
769
770 if (!s->guess_main_pid)
771 return 0;
772
773 assert(s->main_pid <= 0);
774
775 pid = unit_search_main_pid(UNIT(s));
776 if (pid <= 0)
777 return -ENOENT;
778
779 log_unit_debug(UNIT(s)->id, "Main PID guessed: "PID_FMT, pid);
780 r = service_set_main_pid(s, pid);
781 if (r < 0)
782 return r;
783
784 r = unit_watch_pid(UNIT(s), pid);
785 if (r < 0) {
786 /* FIXME: we need to do something here */
787 log_unit_warning(UNIT(s)->id, "Failed to watch PID "PID_FMT" from service %s", pid, UNIT(s)->id);
788 return r;
789 }
790
791 return 0;
792}
793
794static void service_set_state(Service *s, ServiceState state) {
795 ServiceState old_state;
796 const UnitActiveState *table;
797
798 assert(s);
799
800 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
801
802 old_state = s->state;
803 s->state = state;
804
805 service_unwatch_pid_file(s);
806
807 if (!IN_SET(state,
808 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
809 SERVICE_RELOAD,
810 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
811 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
812 SERVICE_AUTO_RESTART))
813 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
814
815 if (!IN_SET(state,
816 SERVICE_START, SERVICE_START_POST,
817 SERVICE_RUNNING, SERVICE_RELOAD,
818 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
819 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
820 service_unwatch_main_pid(s);
821 s->main_command = NULL;
822 }
823
824 if (!IN_SET(state,
825 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
826 SERVICE_RELOAD,
827 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
828 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
829 service_unwatch_control_pid(s);
830 s->control_command = NULL;
831 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
832 }
833
834 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
835 unit_unwatch_all_pids(UNIT(s));
836
837 if (!IN_SET(state,
838 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
839 SERVICE_RUNNING, SERVICE_RELOAD,
840 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
841 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
842 !(state == SERVICE_DEAD && UNIT(s)->job)) {
843 service_close_socket_fd(s);
844 service_connection_unref(s);
845 }
846
847 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
848 service_stop_watchdog(s);
849
850 /* For the inactive states unit_notify() will trim the cgroup,
851 * but for exit we have to do that ourselves... */
852 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
853 unit_destroy_cgroup_if_empty(UNIT(s));
854
855 /* For remain_after_exit services, let's see if we can "release" the
856 * hold on the console, since unit_notify() only does that in case of
857 * change of state */
858 if (state == SERVICE_EXITED &&
859 s->remain_after_exit &&
860 UNIT(s)->manager->n_on_console > 0) {
861
862 ExecContext *ec;
863
864 ec = unit_get_exec_context(UNIT(s));
865 if (ec && exec_context_may_touch_console(ec)) {
866 Manager *m = UNIT(s)->manager;
867
868 m->n_on_console --;
869 if (m->n_on_console == 0)
870 /* unset no_console_output flag, since the console is free */
871 m->no_console_output = false;
872 }
873 }
874
875 if (old_state != state)
876 log_unit_debug(UNIT(s)->id, "%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
877
878 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
879 s->reload_result = SERVICE_SUCCESS;
880}
881
882static int service_coldplug(Unit *u, Hashmap *deferred_work) {
883 Service *s = SERVICE(u);
884 int r;
885
886 assert(s);
887 assert(s->state == SERVICE_DEAD);
888
889 if (s->deserialized_state != s->state) {
890
891 if (IN_SET(s->deserialized_state,
892 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
893 SERVICE_RELOAD,
894 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
895 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
896
897 usec_t k;
898
899 k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec;
900
901 /* For the start/stop timeouts 0 means off */
902 if (k > 0) {
903 r = service_arm_timer(s, k);
904 if (r < 0)
905 return r;
906 }
907 }
908
909 if (s->deserialized_state == SERVICE_AUTO_RESTART) {
910
911 /* The restart timeouts 0 means immediately */
912 r = service_arm_timer(s, s->restart_usec);
913 if (r < 0)
914 return r;
915 }
916
917 if (pid_is_unwaited(s->main_pid) &&
918 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
919 IN_SET(s->deserialized_state,
920 SERVICE_START, SERVICE_START_POST,
921 SERVICE_RUNNING, SERVICE_RELOAD,
922 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
923 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
924 r = unit_watch_pid(UNIT(s), s->main_pid);
925 if (r < 0)
926 return r;
927 }
928
929 if (pid_is_unwaited(s->control_pid) &&
930 IN_SET(s->deserialized_state,
931 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
932 SERVICE_RELOAD,
933 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
934 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
935 r = unit_watch_pid(UNIT(s), s->control_pid);
936 if (r < 0)
937 return r;
938 }
939
940 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
941 unit_watch_all_pids(UNIT(s));
942
943 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
944 service_start_watchdog(s);
945
946 service_set_state(s, s->deserialized_state);
947 }
948
949 return 0;
950}
951
952static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
953 _cleanup_free_ int *rfds = NULL;
954 unsigned rn_fds = 0;
955 Iterator i;
956 int r;
957 Unit *u;
958
959 assert(s);
960 assert(fds);
961 assert(n_fds);
962
963 if (s->socket_fd >= 0)
964 return 0;
965
966 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
967 int *cfds;
968 unsigned cn_fds;
969 Socket *sock;
970
971 if (u->type != UNIT_SOCKET)
972 continue;
973
974 sock = SOCKET(u);
975
976 r = socket_collect_fds(sock, &cfds, &cn_fds);
977 if (r < 0)
978 return r;
979
980 if (cn_fds <= 0) {
981 free(cfds);
982 continue;
983 }
984
985 if (!rfds) {
986 rfds = cfds;
987 rn_fds = cn_fds;
988 } else {
989 int *t;
990
991 t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int));
992 if (!t) {
993 free(cfds);
994 return -ENOMEM;
995 }
996
997 memcpy(t + rn_fds, cfds, cn_fds * sizeof(int));
998 rfds = t;
999 rn_fds += cn_fds;
1000
1001 free(cfds);
1002
1003 }
1004 }
1005
1006 if (s->n_fd_store > 0) {
1007 ServiceFDStore *fs;
1008 int *t;
1009
1010 t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int));
1011 if (!t)
1012 return -ENOMEM;
1013
1014 rfds = t;
1015 LIST_FOREACH(fd_store, fs, s->fd_store)
1016 rfds[rn_fds++] = fs->fd;
1017 }
1018
1019 *fds = rfds;
1020 *n_fds = rn_fds;
1021
1022 rfds = NULL;
1023 return 0;
1024}
1025
1026static int service_spawn(
1027 Service *s,
1028 ExecCommand *c,
1029 usec_t timeout,
1030 bool pass_fds,
1031 bool apply_permissions,
1032 bool apply_chroot,
1033 bool apply_tty_stdin,
1034 bool is_control,
1035 pid_t *_pid) {
1036
1037 pid_t pid;
1038 int r;
1039 int *fds = NULL;
1040 _cleanup_free_ int *fdsbuf = NULL;
1041 unsigned n_fds = 0, n_env = 0;
1042 _cleanup_free_ char *bus_endpoint_path = NULL;
1043 _cleanup_strv_free_ char
1044 **argv = NULL, **final_env = NULL, **our_env = NULL;
1045 const char *path;
1046 ExecParameters exec_params = {
1047 .apply_permissions = apply_permissions,
1048 .apply_chroot = apply_chroot,
1049 .apply_tty_stdin = apply_tty_stdin,
1050 .bus_endpoint_fd = -1,
1051 .selinux_context_net = s->socket_fd_selinux_context_net
1052 };
1053
1054 assert(s);
1055 assert(c);
1056 assert(_pid);
1057
1058 (void) unit_realize_cgroup(UNIT(s));
1059 if (s->reset_cpu_usage) {
1060 (void) unit_reset_cpu_usage(UNIT(s));
1061 s->reset_cpu_usage = false;
1062 }
1063
1064 r = unit_setup_exec_runtime(UNIT(s));
1065 if (r < 0)
1066 goto fail;
1067
1068 if (pass_fds ||
1069 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1070 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1071 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1072
1073 if (s->socket_fd >= 0) {
1074 fds = &s->socket_fd;
1075 n_fds = 1;
1076 } else {
1077 r = service_collect_fds(s, &fdsbuf, &n_fds);
1078 if (r < 0)
1079 goto fail;
1080
1081 fds = fdsbuf;
1082 }
1083 }
1084
1085 if (timeout > 0) {
1086 r = service_arm_timer(s, timeout);
1087 if (r < 0)
1088 goto fail;
1089 } else
1090 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1091
1092 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1093 if (r < 0)
1094 goto fail;
1095
1096 our_env = new0(char*, 6);
1097 if (!our_env) {
1098 r = -ENOMEM;
1099 goto fail;
1100 }
1101
1102 if (is_control ? s->notify_access == NOTIFY_ALL : s->notify_access != NOTIFY_NONE)
1103 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1104 r = -ENOMEM;
1105 goto fail;
1106 }
1107
1108 if (s->main_pid > 0)
1109 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) {
1110 r = -ENOMEM;
1111 goto fail;
1112 }
1113
1114 if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1115 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) {
1116 r = -ENOMEM;
1117 goto fail;
1118 }
1119
1120 if (UNIT_DEREF(s->accept_socket)) {
1121 union sockaddr_union sa;
1122 socklen_t salen = sizeof(sa);
1123
1124 r = getpeername(s->socket_fd, &sa.sa, &salen);
1125 if (r < 0) {
1126 r = -errno;
1127 goto fail;
1128 }
1129
1130 if (IN_SET(sa.sa.sa_family, AF_INET, AF_INET6)) {
1131 _cleanup_free_ char *addr = NULL;
1132 char *t;
1133 int port;
1134
1135 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1136 if (r < 0)
1137 goto fail;
1138
1139 t = strappend("REMOTE_ADDR=", addr);
1140 if (!t) {
1141 r = -ENOMEM;
1142 goto fail;
1143 }
1144 our_env[n_env++] = t;
1145
1146 port = sockaddr_port(&sa.sa);
1147 if (port < 0) {
1148 r = port;
1149 goto fail;
1150 }
1151
1152 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0) {
1153 r = -ENOMEM;
1154 goto fail;
1155 }
1156 our_env[n_env++] = t;
1157 }
1158 }
1159
1160 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1161 if (!final_env) {
1162 r = -ENOMEM;
1163 goto fail;
1164 }
1165
1166 if (is_control && UNIT(s)->cgroup_path) {
1167 path = strjoina(UNIT(s)->cgroup_path, "/control");
1168 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1169 } else
1170 path = UNIT(s)->cgroup_path;
1171
1172#ifdef ENABLE_KDBUS
1173 if (s->exec_context.bus_endpoint) {
1174 r = bus_kernel_create_endpoint(UNIT(s)->manager->running_as == SYSTEMD_SYSTEM ? "system" : "user",
1175 UNIT(s)->id, &bus_endpoint_path);
1176 if (r < 0)
1177 goto fail;
1178
1179 /* Pass the fd to the exec_params so that the child process can upload the policy.
1180 * Keep a reference to the fd in the service, so the endpoint is kept alive as long
1181 * as the service is running. */
1182 exec_params.bus_endpoint_fd = s->bus_endpoint_fd = r;
1183 }
1184#endif
1185
1186 exec_params.argv = argv;
1187 exec_params.fds = fds;
1188 exec_params.n_fds = n_fds;
1189 exec_params.environment = final_env;
1190 exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn;
1191 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1192 exec_params.cgroup_path = path;
1193 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1194 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1195 exec_params.unit_id = UNIT(s)->id;
1196 exec_params.watchdog_usec = s->watchdog_usec;
1197 exec_params.bus_endpoint_path = bus_endpoint_path;
1198 if (s->type == SERVICE_IDLE)
1199 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1200
1201 r = exec_spawn(c,
1202 &s->exec_context,
1203 &exec_params,
1204 s->exec_runtime,
1205 &pid);
1206 if (r < 0)
1207 goto fail;
1208
1209 r = unit_watch_pid(UNIT(s), pid);
1210 if (r < 0)
1211 /* FIXME: we need to do something here */
1212 goto fail;
1213
1214 *_pid = pid;
1215
1216 return 0;
1217
1218fail:
1219 if (timeout)
1220 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1221
1222 return r;
1223}
1224
1225static int main_pid_good(Service *s) {
1226 assert(s);
1227
1228 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1229 * don't know */
1230
1231 /* If we know the pid file, then lets just check if it is
1232 * still valid */
1233 if (s->main_pid_known) {
1234
1235 /* If it's an alien child let's check if it is still
1236 * alive ... */
1237 if (s->main_pid_alien && s->main_pid > 0)
1238 return pid_is_alive(s->main_pid);
1239
1240 /* .. otherwise assume we'll get a SIGCHLD for it,
1241 * which we really should wait for to collect exit
1242 * status and code */
1243 return s->main_pid > 0;
1244 }
1245
1246 /* We don't know the pid */
1247 return -EAGAIN;
1248}
1249
1250_pure_ static int control_pid_good(Service *s) {
1251 assert(s);
1252
1253 return s->control_pid > 0;
1254}
1255
1256static int cgroup_good(Service *s) {
1257 int r;
1258
1259 assert(s);
1260
1261 if (!UNIT(s)->cgroup_path)
1262 return 0;
1263
1264 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1265 if (r < 0)
1266 return r;
1267
1268 return !r;
1269}
1270
1271static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1272 int r;
1273 assert(s);
1274
1275 if (f != SERVICE_SUCCESS)
1276 s->result = f;
1277
1278 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1279
1280 if (s->result != SERVICE_SUCCESS) {
1281 log_unit_warning(UNIT(s)->id, "%s failed.", UNIT(s)->id);
1282 failure_action(UNIT(s)->manager, s->failure_action, s->reboot_arg);
1283 }
1284
1285 if (allow_restart &&
1286 !s->forbid_restart &&
1287 (s->restart == SERVICE_RESTART_ALWAYS ||
1288 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1289 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1290 (s->restart == SERVICE_RESTART_ON_ABNORMAL && !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE)) ||
1291 (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1292 (s->restart == SERVICE_RESTART_ON_ABORT && IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP)) ||
1293 (s->main_exec_status.code == CLD_EXITED && set_contains(s->restart_force_status.status, INT_TO_PTR(s->main_exec_status.status))) ||
1294 (IN_SET(s->main_exec_status.code, CLD_KILLED, CLD_DUMPED) && set_contains(s->restart_force_status.signal, INT_TO_PTR(s->main_exec_status.status)))) &&
1295 (s->main_exec_status.code != CLD_EXITED || !set_contains(s->restart_prevent_status.status, INT_TO_PTR(s->main_exec_status.status))) &&
1296 (!IN_SET(s->main_exec_status.code, CLD_KILLED, CLD_DUMPED) || !set_contains(s->restart_prevent_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
1297
1298 r = service_arm_timer(s, s->restart_usec);
1299 if (r < 0)
1300 goto fail;
1301
1302 service_set_state(s, SERVICE_AUTO_RESTART);
1303 }
1304
1305 s->forbid_restart = false;
1306
1307 /* We want fresh tmpdirs in case service is started again immediately */
1308 exec_runtime_destroy(s->exec_runtime);
1309 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1310
1311 /* Also, remove the runtime directory in */
1312 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1313
1314 /* Try to delete the pid file. At this point it will be
1315 * out-of-date, and some software might be confused by it, so
1316 * let's remove it. */
1317 if (s->pid_file)
1318 unlink_noerrno(s->pid_file);
1319
1320 return;
1321
1322fail:
1323 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run install restart timer: %m", UNIT(s)->id);
1324 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1325}
1326
1327static void service_enter_stop_post(Service *s, ServiceResult f) {
1328 int r;
1329 assert(s);
1330
1331 if (f != SERVICE_SUCCESS)
1332 s->result = f;
1333
1334 service_unwatch_control_pid(s);
1335 unit_watch_all_pids(UNIT(s));
1336
1337 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1338 if (s->control_command) {
1339 s->control_command_id = SERVICE_EXEC_STOP_POST;
1340
1341 r = service_spawn(s,
1342 s->control_command,
1343 s->timeout_stop_usec,
1344 false,
1345 !s->permissions_start_only,
1346 !s->root_directory_start_only,
1347 true,
1348 true,
1349 &s->control_pid);
1350 if (r < 0)
1351 goto fail;
1352
1353 service_set_state(s, SERVICE_STOP_POST);
1354 } else
1355 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1356
1357 return;
1358
1359fail:
1360 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run 'stop-post' task: %m", UNIT(s)->id);
1361 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1362}
1363
1364static int state_to_kill_operation(ServiceState state) {
1365 switch (state) {
1366
1367 case SERVICE_STOP_SIGABRT:
1368 return KILL_ABORT;
1369
1370 case SERVICE_STOP_SIGTERM:
1371 case SERVICE_FINAL_SIGTERM:
1372 return KILL_TERMINATE;
1373
1374 case SERVICE_STOP_SIGKILL:
1375 case SERVICE_FINAL_SIGKILL:
1376 return KILL_KILL;
1377
1378 default:
1379 return _KILL_OPERATION_INVALID;
1380 }
1381}
1382
1383static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1384 int r;
1385
1386 assert(s);
1387
1388 if (f != SERVICE_SUCCESS)
1389 s->result = f;
1390
1391 unit_watch_all_pids(UNIT(s));
1392
1393 r = unit_kill_context(
1394 UNIT(s),
1395 &s->kill_context,
1396 state_to_kill_operation(state),
1397 s->main_pid,
1398 s->control_pid,
1399 s->main_pid_alien);
1400
1401 if (r < 0)
1402 goto fail;
1403
1404 if (r > 0) {
1405 if (s->timeout_stop_usec > 0) {
1406 r = service_arm_timer(s, s->timeout_stop_usec);
1407 if (r < 0)
1408 goto fail;
1409 }
1410
1411 service_set_state(s, state);
1412 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGABRT)
1413 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1414 else if (state == SERVICE_STOP_SIGKILL)
1415 service_enter_stop_post(s, SERVICE_SUCCESS);
1416 else if (state == SERVICE_FINAL_SIGTERM)
1417 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1418 else
1419 service_enter_dead(s, SERVICE_SUCCESS, true);
1420
1421 return;
1422
1423fail:
1424 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to kill processes: %m", UNIT(s)->id);
1425
1426 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1427 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1428 else
1429 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1430}
1431
1432static void service_enter_stop_by_notify(Service *s) {
1433 assert(s);
1434
1435 unit_watch_all_pids(UNIT(s));
1436
1437 if (s->timeout_stop_usec > 0)
1438 service_arm_timer(s, s->timeout_stop_usec);
1439
1440 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1441 service_set_state(s, SERVICE_STOP_SIGTERM);
1442}
1443
1444static void service_enter_stop(Service *s, ServiceResult f) {
1445 int r;
1446
1447 assert(s);
1448
1449 if (f != SERVICE_SUCCESS)
1450 s->result = f;
1451
1452 service_unwatch_control_pid(s);
1453 unit_watch_all_pids(UNIT(s));
1454
1455 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1456 if (s->control_command) {
1457 s->control_command_id = SERVICE_EXEC_STOP;
1458
1459 r = service_spawn(s,
1460 s->control_command,
1461 s->timeout_stop_usec,
1462 false,
1463 !s->permissions_start_only,
1464 !s->root_directory_start_only,
1465 false,
1466 true,
1467 &s->control_pid);
1468 if (r < 0)
1469 goto fail;
1470
1471 service_set_state(s, SERVICE_STOP);
1472 } else
1473 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1474
1475 return;
1476
1477fail:
1478 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run 'stop' task: %m", UNIT(s)->id);
1479 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1480}
1481
1482static void service_enter_running(Service *s, ServiceResult f) {
1483 int main_pid_ok, cgroup_ok;
1484 assert(s);
1485
1486 if (f != SERVICE_SUCCESS)
1487 s->result = f;
1488
1489 main_pid_ok = main_pid_good(s);
1490 cgroup_ok = cgroup_good(s);
1491
1492 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1493 (s->bus_name_good || s->type != SERVICE_DBUS)) {
1494
1495 /* If there are any queued up sd_notify()
1496 * notifications, process them now */
1497 if (s->notify_state == NOTIFY_RELOADING)
1498 service_enter_reload_by_notify(s);
1499 else if (s->notify_state == NOTIFY_STOPPING)
1500 service_enter_stop_by_notify(s);
1501 else
1502 service_set_state(s, SERVICE_RUNNING);
1503
1504 } else if (s->remain_after_exit)
1505 service_set_state(s, SERVICE_EXITED);
1506 else
1507 service_enter_stop(s, SERVICE_SUCCESS);
1508}
1509
1510static void service_enter_start_post(Service *s) {
1511 int r;
1512 assert(s);
1513
1514 service_unwatch_control_pid(s);
1515 service_reset_watchdog(s);
1516
1517 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1518 if (s->control_command) {
1519 s->control_command_id = SERVICE_EXEC_START_POST;
1520
1521 r = service_spawn(s,
1522 s->control_command,
1523 s->timeout_start_usec,
1524 false,
1525 !s->permissions_start_only,
1526 !s->root_directory_start_only,
1527 false,
1528 true,
1529 &s->control_pid);
1530 if (r < 0)
1531 goto fail;
1532
1533 service_set_state(s, SERVICE_START_POST);
1534 } else
1535 service_enter_running(s, SERVICE_SUCCESS);
1536
1537 return;
1538
1539fail:
1540 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run 'start-post' task: %m", UNIT(s)->id);
1541 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1542}
1543
1544static void service_kill_control_processes(Service *s) {
1545 char *p;
1546
1547 if (!UNIT(s)->cgroup_path)
1548 return;
1549
1550 p = strjoina(UNIT(s)->cgroup_path, "/control");
1551 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
1552}
1553
1554static void service_enter_start(Service *s) {
1555 ExecCommand *c;
1556 pid_t pid;
1557 int r;
1558
1559 assert(s);
1560
1561 service_unwatch_control_pid(s);
1562 service_unwatch_main_pid(s);
1563
1564 /* We want to ensure that nobody leaks processes from
1565 * START_PRE here, so let's go on a killing spree, People
1566 * should not spawn long running processes from START_PRE. */
1567 service_kill_control_processes(s);
1568
1569 if (s->type == SERVICE_FORKING) {
1570 s->control_command_id = SERVICE_EXEC_START;
1571 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1572
1573 s->main_command = NULL;
1574 } else {
1575 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1576 s->control_command = NULL;
1577
1578 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1579 }
1580
1581 if (!c) {
1582 assert(s->type == SERVICE_ONESHOT);
1583 service_enter_start_post(s);
1584 return;
1585 }
1586
1587 r = service_spawn(s,
1588 c,
1589 IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_NOTIFY, SERVICE_ONESHOT) ? s->timeout_start_usec : 0,
1590 true,
1591 true,
1592 true,
1593 true,
1594 false,
1595 &pid);
1596 if (r < 0)
1597 goto fail;
1598
1599 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
1600 /* For simple services we immediately start
1601 * the START_POST binaries. */
1602
1603 service_set_main_pid(s, pid);
1604 service_enter_start_post(s);
1605
1606 } else if (s->type == SERVICE_FORKING) {
1607
1608 /* For forking services we wait until the start
1609 * process exited. */
1610
1611 s->control_pid = pid;
1612 service_set_state(s, SERVICE_START);
1613
1614 } else if (s->type == SERVICE_ONESHOT ||
1615 s->type == SERVICE_DBUS ||
1616 s->type == SERVICE_NOTIFY) {
1617
1618 /* For oneshot services we wait until the start
1619 * process exited, too, but it is our main process. */
1620
1621 /* For D-Bus services we know the main pid right away,
1622 * but wait for the bus name to appear on the
1623 * bus. Notify services are similar. */
1624
1625 service_set_main_pid(s, pid);
1626 service_set_state(s, SERVICE_START);
1627 } else
1628 assert_not_reached("Unknown service type");
1629
1630 return;
1631
1632fail:
1633 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run 'start' task: %m", UNIT(s)->id);
1634 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1635}
1636
1637static void service_enter_start_pre(Service *s) {
1638 int r;
1639
1640 assert(s);
1641
1642 service_unwatch_control_pid(s);
1643
1644 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1645 if (s->control_command) {
1646 /* Before we start anything, let's clear up what might
1647 * be left from previous runs. */
1648 service_kill_control_processes(s);
1649
1650 s->control_command_id = SERVICE_EXEC_START_PRE;
1651
1652 r = service_spawn(s,
1653 s->control_command,
1654 s->timeout_start_usec,
1655 false,
1656 !s->permissions_start_only,
1657 !s->root_directory_start_only,
1658 true,
1659 true,
1660 &s->control_pid);
1661 if (r < 0)
1662 goto fail;
1663
1664 service_set_state(s, SERVICE_START_PRE);
1665 } else
1666 service_enter_start(s);
1667
1668 return;
1669
1670fail:
1671 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run 'start-pre' task: %m", UNIT(s)->id);
1672 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1673}
1674
1675static void service_enter_restart(Service *s) {
1676 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1677 int r;
1678
1679 assert(s);
1680
1681 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1682 /* Don't restart things if we are going down anyway */
1683 log_unit_info(UNIT(s)->id, "Stop job pending for unit, delaying automatic restart.");
1684
1685 r = service_arm_timer(s, s->restart_usec);
1686 if (r < 0)
1687 goto fail;
1688
1689 return;
1690 }
1691
1692 /* Any units that are bound to this service must also be
1693 * restarted. We use JOB_RESTART (instead of the more obvious
1694 * JOB_START) here so that those dependency jobs will be added
1695 * as well. */
1696 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
1697 if (r < 0)
1698 goto fail;
1699
1700 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1701 * it will be canceled as part of the service_stop() call that
1702 * is executed as part of JOB_RESTART. */
1703
1704 log_unit_debug(UNIT(s)->id, "%s scheduled restart job.", UNIT(s)->id);
1705 return;
1706
1707fail:
1708 log_unit_warning(UNIT(s)->id, "%s failed to schedule restart job: %s", UNIT(s)->id, bus_error_message(&error, -r));
1709 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1710}
1711
1712static void service_enter_reload_by_notify(Service *s) {
1713 assert(s);
1714
1715 if (s->timeout_start_usec > 0)
1716 service_arm_timer(s, s->timeout_start_usec);
1717
1718 service_set_state(s, SERVICE_RELOAD);
1719}
1720
1721static void service_enter_reload(Service *s) {
1722 int r;
1723
1724 assert(s);
1725
1726 service_unwatch_control_pid(s);
1727
1728 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1729 if (s->control_command) {
1730 s->control_command_id = SERVICE_EXEC_RELOAD;
1731
1732 r = service_spawn(s,
1733 s->control_command,
1734 s->timeout_start_usec,
1735 false,
1736 !s->permissions_start_only,
1737 !s->root_directory_start_only,
1738 false,
1739 true,
1740 &s->control_pid);
1741 if (r < 0)
1742 goto fail;
1743
1744 service_set_state(s, SERVICE_RELOAD);
1745 } else
1746 service_enter_running(s, SERVICE_SUCCESS);
1747
1748 return;
1749
1750fail:
1751 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run 'reload' task: %m", UNIT(s)->id);
1752 s->reload_result = SERVICE_FAILURE_RESOURCES;
1753 service_enter_running(s, SERVICE_SUCCESS);
1754}
1755
1756static void service_run_next_control(Service *s) {
1757 int r;
1758
1759 assert(s);
1760 assert(s->control_command);
1761 assert(s->control_command->command_next);
1762
1763 assert(s->control_command_id != SERVICE_EXEC_START);
1764
1765 s->control_command = s->control_command->command_next;
1766 service_unwatch_control_pid(s);
1767
1768 r = service_spawn(s,
1769 s->control_command,
1770 IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec,
1771 false,
1772 !s->permissions_start_only,
1773 !s->root_directory_start_only,
1774 s->control_command_id == SERVICE_EXEC_START_PRE ||
1775 s->control_command_id == SERVICE_EXEC_STOP_POST,
1776 true,
1777 &s->control_pid);
1778 if (r < 0)
1779 goto fail;
1780
1781 return;
1782
1783fail:
1784 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run next control task: %m", UNIT(s)->id);
1785
1786 if (s->state == SERVICE_START_PRE)
1787 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1788 else if (s->state == SERVICE_STOP)
1789 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1790 else if (s->state == SERVICE_STOP_POST)
1791 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1792 else if (s->state == SERVICE_RELOAD) {
1793 s->reload_result = SERVICE_FAILURE_RESOURCES;
1794 service_enter_running(s, SERVICE_SUCCESS);
1795 } else
1796 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1797}
1798
1799static void service_run_next_main(Service *s) {
1800 pid_t pid;
1801 int r;
1802
1803 assert(s);
1804 assert(s->main_command);
1805 assert(s->main_command->command_next);
1806 assert(s->type == SERVICE_ONESHOT);
1807
1808 s->main_command = s->main_command->command_next;
1809 service_unwatch_main_pid(s);
1810
1811 r = service_spawn(s,
1812 s->main_command,
1813 s->timeout_start_usec,
1814 true,
1815 true,
1816 true,
1817 true,
1818 false,
1819 &pid);
1820 if (r < 0)
1821 goto fail;
1822
1823 service_set_main_pid(s, pid);
1824
1825 return;
1826
1827fail:
1828 log_unit_warning_errno(UNIT(s)->id, r, "%s failed to run next main task: %m", UNIT(s)->id);
1829 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1830}
1831
1832static int service_start_limit_test(Service *s) {
1833 assert(s);
1834
1835 if (ratelimit_test(&s->start_limit))
1836 return 0;
1837
1838 log_unit_warning(UNIT(s)->id, "start request repeated too quickly for %s", UNIT(s)->id);
1839
1840 return failure_action(UNIT(s)->manager, s->start_limit_action, s->reboot_arg);
1841}
1842
1843static int service_start(Unit *u) {
1844 Service *s = SERVICE(u);
1845 int r;
1846
1847 assert(s);
1848
1849 /* We cannot fulfill this request right now, try again later
1850 * please! */
1851 if (IN_SET(s->state,
1852 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1853 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
1854 return -EAGAIN;
1855
1856 /* Already on it! */
1857 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
1858 return 0;
1859
1860 /* A service that will be restarted must be stopped first to
1861 * trigger BindsTo and/or OnFailure dependencies. If a user
1862 * does not want to wait for the holdoff time to elapse, the
1863 * service should be manually restarted, not started. We
1864 * simply return EAGAIN here, so that any start jobs stay
1865 * queued, and assume that the auto restart timer will
1866 * eventually trigger the restart. */
1867 if (s->state == SERVICE_AUTO_RESTART)
1868 return -EAGAIN;
1869
1870 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
1871
1872 /* Make sure we don't enter a busy loop of some kind. */
1873 r = service_start_limit_test(s);
1874 if (r < 0) {
1875 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
1876 return r;
1877 }
1878
1879 s->result = SERVICE_SUCCESS;
1880 s->reload_result = SERVICE_SUCCESS;
1881 s->main_pid_known = false;
1882 s->main_pid_alien = false;
1883 s->forbid_restart = false;
1884 s->reset_cpu_usage = true;
1885
1886 free(s->status_text);
1887 s->status_text = NULL;
1888 s->status_errno = 0;
1889
1890 s->notify_state = NOTIFY_UNKNOWN;
1891
1892 service_enter_start_pre(s);
1893 return 1;
1894}
1895
1896static int service_stop(Unit *u) {
1897 Service *s = SERVICE(u);
1898
1899 assert(s);
1900
1901 /* Don't create restart jobs from here. */
1902 s->forbid_restart = true;
1903
1904 /* Already on it */
1905 if (IN_SET(s->state,
1906 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1907 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
1908 return 0;
1909
1910 /* A restart will be scheduled or is in progress. */
1911 if (s->state == SERVICE_AUTO_RESTART) {
1912 service_set_state(s, SERVICE_DEAD);
1913 return 0;
1914 }
1915
1916 /* If there's already something running we go directly into
1917 * kill mode. */
1918 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
1919 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1920 return 0;
1921 }
1922
1923 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
1924
1925 service_enter_stop(s, SERVICE_SUCCESS);
1926 return 1;
1927}
1928
1929static int service_reload(Unit *u) {
1930 Service *s = SERVICE(u);
1931
1932 assert(s);
1933
1934 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1935
1936 service_enter_reload(s);
1937 return 0;
1938}
1939
1940_pure_ static bool service_can_reload(Unit *u) {
1941 Service *s = SERVICE(u);
1942
1943 assert(s);
1944
1945 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1946}
1947
1948static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1949 Service *s = SERVICE(u);
1950 ServiceFDStore *fs;
1951
1952 assert(u);
1953 assert(f);
1954 assert(fds);
1955
1956 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1957 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
1958 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
1959
1960 if (s->control_pid > 0)
1961 unit_serialize_item_format(u, f, "control-pid", PID_FMT,
1962 s->control_pid);
1963
1964 if (s->main_pid_known && s->main_pid > 0)
1965 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
1966
1967 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1968
1969 if (s->status_text)
1970 unit_serialize_item(u, f, "status-text", s->status_text);
1971
1972 /* FIXME: There's a minor uncleanliness here: if there are
1973 * multiple commands attached here, we will start from the
1974 * first one again */
1975 if (s->control_command_id >= 0)
1976 unit_serialize_item(u, f, "control-command",
1977 service_exec_command_to_string(s->control_command_id));
1978
1979 if (s->socket_fd >= 0) {
1980 int copy;
1981
1982 copy = fdset_put_dup(fds, s->socket_fd);
1983 if (copy < 0)
1984 return copy;
1985
1986 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1987 }
1988
1989 if (s->bus_endpoint_fd >= 0) {
1990 int copy;
1991
1992 copy = fdset_put_dup(fds, s->bus_endpoint_fd);
1993 if (copy < 0)
1994 return copy;
1995
1996 unit_serialize_item_format(u, f, "endpoint-fd", "%i", copy);
1997 }
1998
1999 LIST_FOREACH(fd_store, fs, s->fd_store) {
2000 int copy;
2001
2002 copy = fdset_put_dup(fds, fs->fd);
2003 if (copy < 0)
2004 return copy;
2005
2006 unit_serialize_item_format(u, f, "fd-store-fd", "%i", copy);
2007 }
2008
2009 if (s->main_exec_status.pid > 0) {
2010 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT,
2011 s->main_exec_status.pid);
2012 dual_timestamp_serialize(f, "main-exec-status-start",
2013 &s->main_exec_status.start_timestamp);
2014 dual_timestamp_serialize(f, "main-exec-status-exit",
2015 &s->main_exec_status.exit_timestamp);
2016
2017 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2018 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2019 s->main_exec_status.code);
2020 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2021 s->main_exec_status.status);
2022 }
2023 }
2024 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2025 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2026
2027 if (s->forbid_restart)
2028 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2029
2030 return 0;
2031}
2032
2033static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2034 Service *s = SERVICE(u);
2035 int r;
2036
2037 assert(u);
2038 assert(key);
2039 assert(value);
2040 assert(fds);
2041
2042 if (streq(key, "state")) {
2043 ServiceState state;
2044
2045 state = service_state_from_string(value);
2046 if (state < 0)
2047 log_unit_debug(u->id, "Failed to parse state value %s", value);
2048 else
2049 s->deserialized_state = state;
2050 } else if (streq(key, "result")) {
2051 ServiceResult f;
2052
2053 f = service_result_from_string(value);
2054 if (f < 0)
2055 log_unit_debug(u->id, "Failed to parse result value %s", value);
2056 else if (f != SERVICE_SUCCESS)
2057 s->result = f;
2058
2059 } else if (streq(key, "reload-result")) {
2060 ServiceResult f;
2061
2062 f = service_result_from_string(value);
2063 if (f < 0)
2064 log_unit_debug(u->id, "Failed to parse reload result value %s", value);
2065 else if (f != SERVICE_SUCCESS)
2066 s->reload_result = f;
2067
2068 } else if (streq(key, "control-pid")) {
2069 pid_t pid;
2070
2071 if (parse_pid(value, &pid) < 0)
2072 log_unit_debug(u->id, "Failed to parse control-pid value %s", value);
2073 else
2074 s->control_pid = pid;
2075 } else if (streq(key, "main-pid")) {
2076 pid_t pid;
2077
2078 if (parse_pid(value, &pid) < 0)
2079 log_unit_debug(u->id, "Failed to parse main-pid value %s", value);
2080 else {
2081 service_set_main_pid(s, pid);
2082 unit_watch_pid(UNIT(s), pid);
2083 }
2084 } else if (streq(key, "main-pid-known")) {
2085 int b;
2086
2087 b = parse_boolean(value);
2088 if (b < 0)
2089 log_unit_debug(u->id, "Failed to parse main-pid-known value %s", value);
2090 else
2091 s->main_pid_known = b;
2092 } else if (streq(key, "status-text")) {
2093 char *t;
2094
2095 t = strdup(value);
2096 if (!t)
2097 log_oom();
2098 else {
2099 free(s->status_text);
2100 s->status_text = t;
2101 }
2102
2103 } else if (streq(key, "control-command")) {
2104 ServiceExecCommand id;
2105
2106 id = service_exec_command_from_string(value);
2107 if (id < 0)
2108 log_unit_debug(u->id, "Failed to parse exec-command value %s", value);
2109 else {
2110 s->control_command_id = id;
2111 s->control_command = s->exec_command[id];
2112 }
2113 } else if (streq(key, "socket-fd")) {
2114 int fd;
2115
2116 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2117 log_unit_debug(u->id, "Failed to parse socket-fd value %s", value);
2118 else {
2119 asynchronous_close(s->socket_fd);
2120 s->socket_fd = fdset_remove(fds, fd);
2121 }
2122 } else if (streq(key, "endpoint-fd")) {
2123 int fd;
2124
2125 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2126 log_unit_debug(u->id, "Failed to parse endpoint-fd value %s", value);
2127 else {
2128 safe_close(s->bus_endpoint_fd);
2129 s->bus_endpoint_fd = fdset_remove(fds, fd);
2130 }
2131 } else if (streq(key, "fd-store-fd")) {
2132 int fd;
2133
2134 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2135 log_unit_debug(u->id, "Failed to parse fd-store-fd value %s", value);
2136 else {
2137 r = service_add_fd_store(s, fd);
2138 if (r < 0)
2139 log_unit_error_errno(u->id, r, "Failed to add fd to store: %m");
2140 else if (r > 0)
2141 fdset_remove(fds, fd);
2142 }
2143
2144 } else if (streq(key, "main-exec-status-pid")) {
2145 pid_t pid;
2146
2147 if (parse_pid(value, &pid) < 0)
2148 log_unit_debug(u->id, "Failed to parse main-exec-status-pid value %s", value);
2149 else
2150 s->main_exec_status.pid = pid;
2151 } else if (streq(key, "main-exec-status-code")) {
2152 int i;
2153
2154 if (safe_atoi(value, &i) < 0)
2155 log_unit_debug(u->id, "Failed to parse main-exec-status-code value %s", value);
2156 else
2157 s->main_exec_status.code = i;
2158 } else if (streq(key, "main-exec-status-status")) {
2159 int i;
2160
2161 if (safe_atoi(value, &i) < 0)
2162 log_unit_debug(u->id, "Failed to parse main-exec-status-status value %s", value);
2163 else
2164 s->main_exec_status.status = i;
2165 } else if (streq(key, "main-exec-status-start"))
2166 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2167 else if (streq(key, "main-exec-status-exit"))
2168 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2169 else if (streq(key, "watchdog-timestamp"))
2170 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2171 else if (streq(key, "forbid-restart")) {
2172 int b;
2173
2174 b = parse_boolean(value);
2175 if (b < 0)
2176 log_unit_debug(u->id, "Failed to parse forbid-restart value %s", value);
2177 else
2178 s->forbid_restart = b;
2179 } else
2180 log_unit_debug(u->id, "Unknown serialization key '%s'", key);
2181
2182 return 0;
2183}
2184
2185_pure_ static UnitActiveState service_active_state(Unit *u) {
2186 const UnitActiveState *table;
2187
2188 assert(u);
2189
2190 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2191
2192 return table[SERVICE(u)->state];
2193}
2194
2195static const char *service_sub_state_to_string(Unit *u) {
2196 assert(u);
2197
2198 return service_state_to_string(SERVICE(u)->state);
2199}
2200
2201static bool service_check_gc(Unit *u) {
2202 Service *s = SERVICE(u);
2203
2204 assert(s);
2205
2206 /* Never clean up services that still have a process around,
2207 * even if the service is formally dead. */
2208 if (cgroup_good(s) > 0 ||
2209 main_pid_good(s) > 0 ||
2210 control_pid_good(s) > 0)
2211 return true;
2212
2213 return false;
2214}
2215
2216_pure_ static bool service_check_snapshot(Unit *u) {
2217 Service *s = SERVICE(u);
2218
2219 assert(s);
2220
2221 return s->socket_fd < 0;
2222}
2223
2224static int service_retry_pid_file(Service *s) {
2225 int r;
2226
2227 assert(s->pid_file);
2228 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2229
2230 r = service_load_pid_file(s, false);
2231 if (r < 0)
2232 return r;
2233
2234 service_unwatch_pid_file(s);
2235
2236 service_enter_running(s, SERVICE_SUCCESS);
2237 return 0;
2238}
2239
2240static int service_watch_pid_file(Service *s) {
2241 int r;
2242
2243 log_unit_debug(UNIT(s)->id, "Setting watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
2244
2245 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2246 if (r < 0)
2247 goto fail;
2248
2249 /* the pidfile might have appeared just before we set the watch */
2250 log_unit_debug(UNIT(s)->id, "Trying to read %s's PID file %s in case it changed", UNIT(s)->id, s->pid_file_pathspec->path);
2251 service_retry_pid_file(s);
2252
2253 return 0;
2254fail:
2255 log_unit_error_errno(UNIT(s)->id, r, "Failed to set a watch for %s's PID file %s: %m", UNIT(s)->id, s->pid_file_pathspec->path);
2256 service_unwatch_pid_file(s);
2257 return r;
2258}
2259
2260static int service_demand_pid_file(Service *s) {
2261 PathSpec *ps;
2262
2263 assert(s->pid_file);
2264 assert(!s->pid_file_pathspec);
2265
2266 ps = new0(PathSpec, 1);
2267 if (!ps)
2268 return -ENOMEM;
2269
2270 ps->unit = UNIT(s);
2271 ps->path = strdup(s->pid_file);
2272 if (!ps->path) {
2273 free(ps);
2274 return -ENOMEM;
2275 }
2276
2277 path_kill_slashes(ps->path);
2278
2279 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2280 * keep their PID file open all the time. */
2281 ps->type = PATH_MODIFIED;
2282 ps->inotify_fd = -1;
2283
2284 s->pid_file_pathspec = ps;
2285
2286 return service_watch_pid_file(s);
2287}
2288
2289static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2290 PathSpec *p = userdata;
2291 Service *s;
2292
2293 assert(p);
2294
2295 s = SERVICE(p->unit);
2296
2297 assert(s);
2298 assert(fd >= 0);
2299 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2300 assert(s->pid_file_pathspec);
2301 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2302
2303 log_unit_debug(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
2304
2305 if (path_spec_fd_event(p, events) < 0)
2306 goto fail;
2307
2308 if (service_retry_pid_file(s) == 0)
2309 return 0;
2310
2311 if (service_watch_pid_file(s) < 0)
2312 goto fail;
2313
2314 return 0;
2315
2316fail:
2317 service_unwatch_pid_file(s);
2318 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2319 return 0;
2320}
2321
2322static void service_notify_cgroup_empty_event(Unit *u) {
2323 Service *s = SERVICE(u);
2324
2325 assert(u);
2326
2327 log_unit_debug(u->id, "%s: cgroup is empty", u->id);
2328
2329 switch (s->state) {
2330
2331 /* Waiting for SIGCHLD is usually more interesting,
2332 * because it includes return codes/signals. Which is
2333 * why we ignore the cgroup events for most cases,
2334 * except when we don't know pid which to expect the
2335 * SIGCHLD for. */
2336
2337 case SERVICE_START:
2338 case SERVICE_START_POST:
2339 /* If we were hoping for the daemon to write its PID file,
2340 * we can give up now. */
2341 if (s->pid_file_pathspec) {
2342 log_unit_warning(u->id, "%s never wrote its PID file. Failing.", UNIT(s)->id);
2343
2344 service_unwatch_pid_file(s);
2345 if (s->state == SERVICE_START)
2346 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2347 else
2348 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2349 }
2350 break;
2351
2352 case SERVICE_RUNNING:
2353 /* service_enter_running() will figure out what to do */
2354 service_enter_running(s, SERVICE_SUCCESS);
2355 break;
2356
2357 case SERVICE_STOP_SIGABRT:
2358 case SERVICE_STOP_SIGTERM:
2359 case SERVICE_STOP_SIGKILL:
2360
2361 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2362 service_enter_stop_post(s, SERVICE_SUCCESS);
2363
2364 break;
2365
2366 case SERVICE_STOP_POST:
2367 case SERVICE_FINAL_SIGTERM:
2368 case SERVICE_FINAL_SIGKILL:
2369 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2370 service_enter_dead(s, SERVICE_SUCCESS, true);
2371
2372 break;
2373
2374 default:
2375 ;
2376 }
2377}
2378
2379static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2380 Service *s = SERVICE(u);
2381 ServiceResult f;
2382
2383 assert(s);
2384 assert(pid >= 0);
2385
2386 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2387 is_clean_exit_lsb(code, status, &s->success_status))
2388 f = SERVICE_SUCCESS;
2389 else if (code == CLD_EXITED)
2390 f = SERVICE_FAILURE_EXIT_CODE;
2391 else if (code == CLD_KILLED)
2392 f = SERVICE_FAILURE_SIGNAL;
2393 else if (code == CLD_DUMPED)
2394 f = SERVICE_FAILURE_CORE_DUMP;
2395 else
2396 assert_not_reached("Unknown code");
2397
2398 if (s->main_pid == pid) {
2399 /* Forking services may occasionally move to a new PID.
2400 * As long as they update the PID file before exiting the old
2401 * PID, they're fine. */
2402 if (service_load_pid_file(s, false) == 0)
2403 return;
2404
2405 s->main_pid = 0;
2406 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2407
2408 if (s->main_command) {
2409 /* If this is not a forking service than the
2410 * main process got started and hence we copy
2411 * the exit status so that it is recorded both
2412 * as main and as control process exit
2413 * status */
2414
2415 s->main_command->exec_status = s->main_exec_status;
2416
2417 if (s->main_command->ignore)
2418 f = SERVICE_SUCCESS;
2419 } else if (s->exec_command[SERVICE_EXEC_START]) {
2420
2421 /* If this is a forked process, then we should
2422 * ignore the return value if this was
2423 * configured for the starter process */
2424
2425 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2426 f = SERVICE_SUCCESS;
2427 }
2428
2429 log_unit_struct(u->id,
2430 f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2431 LOG_MESSAGE("%s: main process exited, code=%s, status=%i/%s",
2432 u->id, sigchld_code_to_string(code), status,
2433 strna(code == CLD_EXITED
2434 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2435 : signal_to_string(status))),
2436 "EXIT_CODE=%s", sigchld_code_to_string(code),
2437 "EXIT_STATUS=%i", status,
2438 NULL);
2439
2440 if (f != SERVICE_SUCCESS)
2441 s->result = f;
2442
2443 if (s->main_command &&
2444 s->main_command->command_next &&
2445 f == SERVICE_SUCCESS) {
2446
2447 /* There is another command to *
2448 * execute, so let's do that. */
2449
2450 log_unit_debug(u->id, "%s running next main command for state %s", u->id, service_state_to_string(s->state));
2451 service_run_next_main(s);
2452
2453 } else {
2454
2455 /* The service exited, so the service is officially
2456 * gone. */
2457 s->main_command = NULL;
2458
2459 switch (s->state) {
2460
2461 case SERVICE_START_POST:
2462 case SERVICE_RELOAD:
2463 case SERVICE_STOP:
2464 /* Need to wait until the operation is
2465 * done */
2466 break;
2467
2468 case SERVICE_START:
2469 if (s->type == SERVICE_ONESHOT) {
2470 /* This was our main goal, so let's go on */
2471 if (f == SERVICE_SUCCESS)
2472 service_enter_start_post(s);
2473 else
2474 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2475 break;
2476 }
2477
2478 /* Fall through */
2479
2480 case SERVICE_RUNNING:
2481 service_enter_running(s, f);
2482 break;
2483
2484 case SERVICE_STOP_SIGABRT:
2485 case SERVICE_STOP_SIGTERM:
2486 case SERVICE_STOP_SIGKILL:
2487
2488 if (!control_pid_good(s))
2489 service_enter_stop_post(s, f);
2490
2491 /* If there is still a control process, wait for that first */
2492 break;
2493
2494 case SERVICE_STOP_POST:
2495 case SERVICE_FINAL_SIGTERM:
2496 case SERVICE_FINAL_SIGKILL:
2497
2498 if (!control_pid_good(s))
2499 service_enter_dead(s, f, true);
2500 break;
2501
2502 default:
2503 assert_not_reached("Uh, main process died at wrong time.");
2504 }
2505 }
2506
2507 } else if (s->control_pid == pid) {
2508 s->control_pid = 0;
2509
2510 if (s->control_command) {
2511 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2512
2513 if (s->control_command->ignore)
2514 f = SERVICE_SUCCESS;
2515 }
2516
2517 log_unit_full(u->id,
2518 f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2519 "%s: control process exited, code=%s status=%i",
2520 u->id, sigchld_code_to_string(code), status);
2521
2522 if (f != SERVICE_SUCCESS)
2523 s->result = f;
2524
2525 /* Immediately get rid of the cgroup, so that the
2526 * kernel doesn't delay the cgroup empty messages for
2527 * the service cgroup any longer than necessary */
2528 service_kill_control_processes(s);
2529
2530 if (s->control_command &&
2531 s->control_command->command_next &&
2532 f == SERVICE_SUCCESS) {
2533
2534 /* There is another command to *
2535 * execute, so let's do that. */
2536
2537 log_unit_debug(u->id, "%s running next control command for state %s", u->id, service_state_to_string(s->state));
2538 service_run_next_control(s);
2539
2540 } else {
2541 /* No further commands for this step, so let's
2542 * figure out what to do next */
2543
2544 s->control_command = NULL;
2545 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2546
2547 log_unit_debug(u->id, "%s got final SIGCHLD for state %s", u->id, service_state_to_string(s->state));
2548
2549 switch (s->state) {
2550
2551 case SERVICE_START_PRE:
2552 if (f == SERVICE_SUCCESS)
2553 service_enter_start(s);
2554 else
2555 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2556 break;
2557
2558 case SERVICE_START:
2559 if (s->type != SERVICE_FORKING)
2560 /* Maybe spurious event due to a reload that changed the type? */
2561 break;
2562
2563 if (f != SERVICE_SUCCESS) {
2564 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2565 break;
2566 }
2567
2568 if (s->pid_file) {
2569 bool has_start_post;
2570 int r;
2571
2572 /* Let's try to load the pid file here if we can.
2573 * The PID file might actually be created by a START_POST
2574 * script. In that case don't worry if the loading fails. */
2575
2576 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2577 r = service_load_pid_file(s, !has_start_post);
2578 if (!has_start_post && r < 0) {
2579 r = service_demand_pid_file(s);
2580 if (r < 0 || !cgroup_good(s))
2581 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2582 break;
2583 }
2584 } else
2585 service_search_main_pid(s);
2586
2587 service_enter_start_post(s);
2588 break;
2589
2590 case SERVICE_START_POST:
2591 if (f != SERVICE_SUCCESS) {
2592 service_enter_stop(s, f);
2593 break;
2594 }
2595
2596 if (s->pid_file) {
2597 int r;
2598
2599 r = service_load_pid_file(s, true);
2600 if (r < 0) {
2601 r = service_demand_pid_file(s);
2602 if (r < 0 || !cgroup_good(s))
2603 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2604 break;
2605 }
2606 } else
2607 service_search_main_pid(s);
2608
2609 service_enter_running(s, SERVICE_SUCCESS);
2610 break;
2611
2612 case SERVICE_RELOAD:
2613 if (f == SERVICE_SUCCESS) {
2614 service_load_pid_file(s, true);
2615 service_search_main_pid(s);
2616 }
2617
2618 s->reload_result = f;
2619 service_enter_running(s, SERVICE_SUCCESS);
2620 break;
2621
2622 case SERVICE_STOP:
2623 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2624 break;
2625
2626 case SERVICE_STOP_SIGABRT:
2627 case SERVICE_STOP_SIGTERM:
2628 case SERVICE_STOP_SIGKILL:
2629 if (main_pid_good(s) <= 0)
2630 service_enter_stop_post(s, f);
2631
2632 /* If there is still a service
2633 * process around, wait until
2634 * that one quit, too */
2635 break;
2636
2637 case SERVICE_STOP_POST:
2638 case SERVICE_FINAL_SIGTERM:
2639 case SERVICE_FINAL_SIGKILL:
2640 if (main_pid_good(s) <= 0)
2641 service_enter_dead(s, f, true);
2642 break;
2643
2644 default:
2645 assert_not_reached("Uh, control process died at wrong time.");
2646 }
2647 }
2648 }
2649
2650 /* Notify clients about changed exit status */
2651 unit_add_to_dbus_queue(u);
2652
2653 /* We got one SIGCHLD for the service, let's watch all
2654 * processes that are now running of the service, and watch
2655 * that. Among the PIDs we then watch will be children
2656 * reassigned to us, which hopefully allows us to identify
2657 * when all children are gone */
2658 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
2659 unit_watch_all_pids(u);
2660
2661 /* If the PID set is empty now, then let's finish this off */
2662 if (set_isempty(u->pids))
2663 service_notify_cgroup_empty_event(u);
2664}
2665
2666static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
2667 Service *s = SERVICE(userdata);
2668
2669 assert(s);
2670 assert(source == s->timer_event_source);
2671
2672 switch (s->state) {
2673
2674 case SERVICE_START_PRE:
2675 case SERVICE_START:
2676 log_unit_warning(UNIT(s)->id, "%s %s operation timed out. Terminating.", UNIT(s)->id, s->state == SERVICE_START ? "start" : "start-pre");
2677 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2678 break;
2679
2680 case SERVICE_START_POST:
2681 log_unit_warning(UNIT(s)->id, "%s start-post operation timed out. Stopping.", UNIT(s)->id);
2682 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
2683 break;
2684
2685 case SERVICE_RELOAD:
2686 log_unit_warning(UNIT(s)->id, "%s reload operation timed out. Stopping.", UNIT(s)->id);
2687 s->reload_result = SERVICE_FAILURE_TIMEOUT;
2688 service_enter_running(s, SERVICE_SUCCESS);
2689 break;
2690
2691 case SERVICE_STOP:
2692 log_unit_warning(UNIT(s)->id, "%s stopping timed out. Terminating.", UNIT(s)->id);
2693 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2694 break;
2695
2696 case SERVICE_STOP_SIGABRT:
2697 log_unit_warning(UNIT(s)->id, "%s stop-sigabrt timed out. Terminating.", UNIT(s)->id);
2698 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2699 break;
2700
2701 case SERVICE_STOP_SIGTERM:
2702 if (s->kill_context.send_sigkill) {
2703 log_unit_warning(UNIT(s)->id, "%s stop-sigterm timed out. Killing.", UNIT(s)->id);
2704 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2705 } else {
2706 log_unit_warning(UNIT(s)->id, "%s stop-sigterm timed out. Skipping SIGKILL.", UNIT(s)->id);
2707 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2708 }
2709
2710 break;
2711
2712 case SERVICE_STOP_SIGKILL:
2713 /* Uh, we sent a SIGKILL and it is still not gone?
2714 * Must be something we cannot kill, so let's just be
2715 * weirded out and continue */
2716
2717 log_unit_warning(UNIT(s)->id, "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
2718 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2719 break;
2720
2721 case SERVICE_STOP_POST:
2722 log_unit_warning(UNIT(s)->id, "%s stop-post timed out. Terminating.", UNIT(s)->id);
2723 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2724 break;
2725
2726 case SERVICE_FINAL_SIGTERM:
2727 if (s->kill_context.send_sigkill) {
2728 log_unit_warning(UNIT(s)->id, "%s stop-final-sigterm timed out. Killing.", UNIT(s)->id);
2729 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2730 } else {
2731 log_unit_warning(UNIT(s)->id, "%s stop-final-sigterm timed out. Skipping SIGKILL. Entering failed mode.", UNIT(s)->id);
2732 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
2733 }
2734
2735 break;
2736
2737 case SERVICE_FINAL_SIGKILL:
2738 log_unit_warning(UNIT(s)->id, "%s still around after final SIGKILL. Entering failed mode.", UNIT(s)->id);
2739 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
2740 break;
2741
2742 case SERVICE_AUTO_RESTART:
2743 log_unit_info(UNIT(s)->id,
2744 s->restart_usec > 0 ?
2745 "%s holdoff time over, scheduling restart." :
2746 "%s has no holdoff time, scheduling restart.",
2747 UNIT(s)->id);
2748 service_enter_restart(s);
2749 break;
2750
2751 default:
2752 assert_not_reached("Timeout at wrong time.");
2753 }
2754
2755 return 0;
2756}
2757
2758static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
2759 Service *s = SERVICE(userdata);
2760 char t[FORMAT_TIMESPAN_MAX];
2761
2762 assert(s);
2763 assert(source == s->watchdog_event_source);
2764
2765 log_unit_error(UNIT(s)->id, "%s watchdog timeout (limit %s)!", UNIT(s)->id,
2766 format_timespan(t, sizeof(t), s->watchdog_usec, 1));
2767
2768 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
2769
2770 return 0;
2771}
2772
2773static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
2774 Service *s = SERVICE(u);
2775 _cleanup_free_ char *cc = NULL;
2776 bool notify_dbus = false;
2777 const char *e;
2778
2779 assert(u);
2780
2781 cc = strv_join(tags, ", ");
2782 log_unit_debug(u->id, "%s: Got notification message from PID "PID_FMT" (%s)",
2783 u->id, pid, isempty(cc) ? "n/a" : cc);
2784
2785 if (s->notify_access == NOTIFY_NONE) {
2786 log_unit_warning(u->id, "%s: Got notification message from PID "PID_FMT", but reception is disabled.", u->id, pid);
2787 return;
2788 }
2789
2790 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2791 if (s->main_pid != 0)
2792 log_unit_warning(u->id, "%s: Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, u->id, pid, s->main_pid);
2793 else
2794 log_unit_debug(u->id, "%s: Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", u->id, pid);
2795 return;
2796 }
2797
2798 /* Interpret MAINPID= */
2799 e = strv_find_startswith(tags, "MAINPID=");
2800 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
2801 if (parse_pid(e, &pid) < 0)
2802 log_unit_warning(u->id, "Failed to parse MAINPID= field in notification message: %s", e);
2803 else {
2804 log_unit_debug(u->id, "%s: got MAINPID=%s", u->id, e);
2805
2806 service_set_main_pid(s, pid);
2807 unit_watch_pid(UNIT(s), pid);
2808 notify_dbus = true;
2809 }
2810 }
2811
2812 /* Interpret RELOADING= */
2813 if (strv_find(tags, "RELOADING=1")) {
2814
2815 log_unit_debug(u->id, "%s: got RELOADING=1", u->id);
2816 s->notify_state = NOTIFY_RELOADING;
2817
2818 if (s->state == SERVICE_RUNNING)
2819 service_enter_reload_by_notify(s);
2820
2821 notify_dbus = true;
2822 }
2823
2824 /* Interpret READY= */
2825 if (strv_find(tags, "READY=1")) {
2826
2827 log_unit_debug(u->id, "%s: got READY=1", u->id);
2828 s->notify_state = NOTIFY_READY;
2829
2830 /* Type=notify services inform us about completed
2831 * initialization with READY=1 */
2832 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
2833 service_enter_start_post(s);
2834
2835 /* Sending READY=1 while we are reloading informs us
2836 * that the reloading is complete */
2837 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
2838 service_enter_running(s, SERVICE_SUCCESS);
2839
2840 notify_dbus = true;
2841 }
2842
2843 /* Interpret STOPPING= */
2844 if (strv_find(tags, "STOPPING=1")) {
2845
2846 log_unit_debug(u->id, "%s: got STOPPING=1", u->id);
2847 s->notify_state = NOTIFY_STOPPING;
2848
2849 if (s->state == SERVICE_RUNNING)
2850 service_enter_stop_by_notify(s);
2851
2852 notify_dbus = true;
2853 }
2854
2855 /* Interpret STATUS= */
2856 e = strv_find_startswith(tags, "STATUS=");
2857 if (e) {
2858 _cleanup_free_ char *t = NULL;
2859
2860 if (!isempty(e)) {
2861 if (!utf8_is_valid(e))
2862 log_unit_warning(u->id, "Status message in notification is not UTF-8 clean.");
2863 else {
2864 log_unit_debug(u->id, "%s: got STATUS=%s", u->id, e);
2865
2866 t = strdup(e);
2867 if (!t)
2868 log_oom();
2869 }
2870 }
2871
2872 if (!streq_ptr(s->status_text, t)) {
2873
2874 free(s->status_text);
2875 s->status_text = t;
2876 t = NULL;
2877
2878 notify_dbus = true;
2879 }
2880 }
2881
2882 /* Interpret ERRNO= */
2883 e = strv_find_startswith(tags, "ERRNO=");
2884 if (e) {
2885 int status_errno;
2886
2887 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
2888 log_unit_warning(u->id, "Failed to parse ERRNO= field in notification message: %s", e);
2889 else {
2890 log_unit_debug(u->id, "%s: got ERRNO=%s", u->id, e);
2891
2892 if (s->status_errno != status_errno) {
2893 s->status_errno = status_errno;
2894 notify_dbus = true;
2895 }
2896 }
2897 }
2898
2899 /* Interpret WATCHDOG= */
2900 if (strv_find(tags, "WATCHDOG=1")) {
2901 log_unit_debug(u->id, "%s: got WATCHDOG=1", u->id);
2902 service_reset_watchdog(s);
2903 }
2904
2905 /* Add the passed fds to the fd store */
2906 if (strv_find(tags, "FDSTORE=1")) {
2907 log_unit_debug(u->id, "%s: got FDSTORE=1", u->id);
2908 service_add_fd_store_set(s, fds);
2909 }
2910
2911 /* Notify clients about changed status or main pid */
2912 if (notify_dbus)
2913 unit_add_to_dbus_queue(u);
2914}
2915
2916static int service_get_timeout(Unit *u, uint64_t *timeout) {
2917 Service *s = SERVICE(u);
2918 int r;
2919
2920 if (!s->timer_event_source)
2921 return 0;
2922
2923 r = sd_event_source_get_time(s->timer_event_source, timeout);
2924 if (r < 0)
2925 return r;
2926
2927 return 1;
2928}
2929
2930static void service_bus_name_owner_change(
2931 Unit *u,
2932 const char *name,
2933 const char *old_owner,
2934 const char *new_owner) {
2935
2936 Service *s = SERVICE(u);
2937 int r;
2938
2939 assert(s);
2940 assert(name);
2941
2942 assert(streq(s->bus_name, name));
2943 assert(old_owner || new_owner);
2944
2945 if (old_owner && new_owner)
2946 log_unit_debug(u->id, "%s's D-Bus name %s changed owner from %s to %s", u->id, name, old_owner, new_owner);
2947 else if (old_owner)
2948 log_unit_debug(u->id, "%s's D-Bus name %s no longer registered by %s", u->id, name, old_owner);
2949 else
2950 log_unit_debug(u->id, "%s's D-Bus name %s now registered by %s", u->id, name, new_owner);
2951
2952 s->bus_name_good = !!new_owner;
2953
2954 if (s->type == SERVICE_DBUS) {
2955
2956 /* service_enter_running() will figure out what to
2957 * do */
2958 if (s->state == SERVICE_RUNNING)
2959 service_enter_running(s, SERVICE_SUCCESS);
2960 else if (s->state == SERVICE_START && new_owner)
2961 service_enter_start_post(s);
2962
2963 } else if (new_owner &&
2964 s->main_pid <= 0 &&
2965 (s->state == SERVICE_START ||
2966 s->state == SERVICE_START_POST ||
2967 s->state == SERVICE_RUNNING ||
2968 s->state == SERVICE_RELOAD)) {
2969
2970 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
2971 pid_t pid;
2972
2973 /* Try to acquire PID from bus service */
2974
2975 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
2976 if (r >= 0)
2977 r = sd_bus_creds_get_pid(creds, &pid);
2978 if (r >= 0) {
2979 log_unit_debug(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
2980
2981 service_set_main_pid(s, pid);
2982 unit_watch_pid(UNIT(s), pid);
2983 }
2984 }
2985}
2986
2987int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
2988 _cleanup_free_ char *peer = NULL;
2989 int r;
2990
2991 assert(s);
2992 assert(fd >= 0);
2993
2994 /* This is called by the socket code when instantiating a new
2995 * service for a stream socket and the socket needs to be
2996 * configured. */
2997
2998 if (UNIT(s)->load_state != UNIT_LOADED)
2999 return -EINVAL;
3000
3001 if (s->socket_fd >= 0)
3002 return -EBUSY;
3003
3004 if (s->state != SERVICE_DEAD)
3005 return -EAGAIN;
3006
3007 if (getpeername_pretty(fd, &peer) >= 0) {
3008
3009 if (UNIT(s)->description) {
3010 _cleanup_free_ char *a;
3011
3012 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3013 if (!a)
3014 return -ENOMEM;
3015
3016 r = unit_set_description(UNIT(s), a);
3017 } else
3018 r = unit_set_description(UNIT(s), peer);
3019
3020 if (r < 0)
3021 return r;
3022 }
3023
3024 s->socket_fd = fd;
3025 s->socket_fd_selinux_context_net = selinux_context_net;
3026
3027 unit_ref_set(&s->accept_socket, UNIT(sock));
3028
3029 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3030}
3031
3032static void service_reset_failed(Unit *u) {
3033 Service *s = SERVICE(u);
3034
3035 assert(s);
3036
3037 if (s->state == SERVICE_FAILED)
3038 service_set_state(s, SERVICE_DEAD);
3039
3040 s->result = SERVICE_SUCCESS;
3041 s->reload_result = SERVICE_SUCCESS;
3042
3043 RATELIMIT_RESET(s->start_limit);
3044}
3045
3046static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3047 Service *s = SERVICE(u);
3048
3049 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3050}
3051
3052static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3053 [SERVICE_DEAD] = "dead",
3054 [SERVICE_START_PRE] = "start-pre",
3055 [SERVICE_START] = "start",
3056 [SERVICE_START_POST] = "start-post",
3057 [SERVICE_RUNNING] = "running",
3058 [SERVICE_EXITED] = "exited",
3059 [SERVICE_RELOAD] = "reload",
3060 [SERVICE_STOP] = "stop",
3061 [SERVICE_STOP_SIGABRT] = "stop-sigabrt",
3062 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3063 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3064 [SERVICE_STOP_POST] = "stop-post",
3065 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3066 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3067 [SERVICE_FAILED] = "failed",
3068 [SERVICE_AUTO_RESTART] = "auto-restart",
3069};
3070
3071DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3072
3073static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3074 [SERVICE_RESTART_NO] = "no",
3075 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3076 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3077 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3078 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3079 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3080 [SERVICE_RESTART_ALWAYS] = "always",
3081};
3082
3083DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3084
3085static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3086 [SERVICE_SIMPLE] = "simple",
3087 [SERVICE_FORKING] = "forking",
3088 [SERVICE_ONESHOT] = "oneshot",
3089 [SERVICE_DBUS] = "dbus",
3090 [SERVICE_NOTIFY] = "notify",
3091 [SERVICE_IDLE] = "idle"
3092};
3093
3094DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3095
3096static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3097 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3098 [SERVICE_EXEC_START] = "ExecStart",
3099 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3100 [SERVICE_EXEC_RELOAD] = "ExecReload",
3101 [SERVICE_EXEC_STOP] = "ExecStop",
3102 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3103};
3104
3105DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3106
3107static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3108 [NOTIFY_NONE] = "none",
3109 [NOTIFY_MAIN] = "main",
3110 [NOTIFY_ALL] = "all"
3111};
3112
3113DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3114
3115static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3116 [NOTIFY_UNKNOWN] = "unknown",
3117 [NOTIFY_READY] = "ready",
3118 [NOTIFY_RELOADING] = "reloading",
3119 [NOTIFY_STOPPING] = "stopping",
3120};
3121
3122DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3123
3124static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3125 [SERVICE_SUCCESS] = "success",
3126 [SERVICE_FAILURE_RESOURCES] = "resources",
3127 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3128 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3129 [SERVICE_FAILURE_SIGNAL] = "signal",
3130 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3131 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3132 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3133};
3134
3135DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3136
3137const UnitVTable service_vtable = {
3138 .object_size = sizeof(Service),
3139 .exec_context_offset = offsetof(Service, exec_context),
3140 .cgroup_context_offset = offsetof(Service, cgroup_context),
3141 .kill_context_offset = offsetof(Service, kill_context),
3142 .exec_runtime_offset = offsetof(Service, exec_runtime),
3143
3144 .sections =
3145 "Unit\0"
3146 "Service\0"
3147 "Install\0",
3148 .private_section = "Service",
3149
3150 .init = service_init,
3151 .done = service_done,
3152 .load = service_load,
3153 .release_resources = service_release_resources,
3154
3155 .coldplug = service_coldplug,
3156
3157 .dump = service_dump,
3158
3159 .start = service_start,
3160 .stop = service_stop,
3161 .reload = service_reload,
3162
3163 .can_reload = service_can_reload,
3164
3165 .kill = service_kill,
3166
3167 .serialize = service_serialize,
3168 .deserialize_item = service_deserialize_item,
3169
3170 .active_state = service_active_state,
3171 .sub_state_to_string = service_sub_state_to_string,
3172
3173 .check_gc = service_check_gc,
3174 .check_snapshot = service_check_snapshot,
3175
3176 .sigchld_event = service_sigchld_event,
3177
3178 .reset_failed = service_reset_failed,
3179
3180 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3181 .notify_message = service_notify_message,
3182
3183 .bus_name_owner_change = service_bus_name_owner_change,
3184
3185 .bus_interface = "org.freedesktop.systemd1.Service",
3186 .bus_vtable = bus_service_vtable,
3187 .bus_set_property = bus_service_set_property,
3188 .bus_commit_properties = bus_service_commit_properties,
3189
3190 .get_timeout = service_get_timeout,
3191 .can_transient = true,
3192
3193 .status_message_formats = {
3194 .starting_stopping = {
3195 [0] = "Starting %s...",
3196 [1] = "Stopping %s...",
3197 },
3198 .finished_start_job = {
3199 [JOB_DONE] = "Started %s.",
3200 [JOB_FAILED] = "Failed to start %s.",
3201 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3202 [JOB_TIMEOUT] = "Timed out starting %s.",
3203 },
3204 .finished_stop_job = {
3205 [JOB_DONE] = "Stopped %s.",
3206 [JOB_FAILED] = "Stopped (with error) %s.",
3207 [JOB_TIMEOUT] = "Timed out stopping %s.",
3208 },
3209 },
3210};
Unnamed repository; edit this file 'description' to name the repository.