]> git.ipfire.org Git - thirdparty/systemd.git/blame_incremental - src/core/service.c
projects / thirdparty / systemd.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
networkd: remove duplicated include
[thirdparty/systemd.git] / src / core / service.c
... / ...
CommitLineData
1/***
2 This file is part of systemd.
3
4 Copyright 2010 Lennart Poettering
5
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
10
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <errno.h>
21#include <signal.h>
22#include <unistd.h>
23
24#include "alloc-util.h"
25#include "async.h"
26#include "bus-error.h"
27#include "bus-kernel.h"
28#include "bus-util.h"
29#include "dbus-service.h"
30#include "def.h"
31#include "env-util.h"
32#include "escape.h"
33#include "exit-status.h"
34#include "fd-util.h"
35#include "fileio.h"
36#include "format-util.h"
37#include "fs-util.h"
38#include "load-dropin.h"
39#include "load-fragment.h"
40#include "log.h"
41#include "manager.h"
42#include "parse-util.h"
43#include "path-util.h"
44#include "process-util.h"
45#include "service.h"
46#include "signal-util.h"
47#include "special.h"
48#include "stdio-util.h"
49#include "string-table.h"
50#include "string-util.h"
51#include "strv.h"
52#include "unit-name.h"
53#include "unit.h"
54#include "utf8.h"
55#include "util.h"
56
57static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
58 [SERVICE_DEAD] = UNIT_INACTIVE,
59 [SERVICE_START_PRE] = UNIT_ACTIVATING,
60 [SERVICE_START] = UNIT_ACTIVATING,
61 [SERVICE_START_POST] = UNIT_ACTIVATING,
62 [SERVICE_RUNNING] = UNIT_ACTIVE,
63 [SERVICE_EXITED] = UNIT_ACTIVE,
64 [SERVICE_RELOAD] = UNIT_RELOADING,
65 [SERVICE_STOP] = UNIT_DEACTIVATING,
66 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
67 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
68 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
69 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
70 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
71 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
72 [SERVICE_FAILED] = UNIT_FAILED,
73 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
74};
75
76/* For Type=idle we never want to delay any other jobs, hence we
77 * consider idle jobs active as soon as we start working on them */
78static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
79 [SERVICE_DEAD] = UNIT_INACTIVE,
80 [SERVICE_START_PRE] = UNIT_ACTIVE,
81 [SERVICE_START] = UNIT_ACTIVE,
82 [SERVICE_START_POST] = UNIT_ACTIVE,
83 [SERVICE_RUNNING] = UNIT_ACTIVE,
84 [SERVICE_EXITED] = UNIT_ACTIVE,
85 [SERVICE_RELOAD] = UNIT_RELOADING,
86 [SERVICE_STOP] = UNIT_DEACTIVATING,
87 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
88 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
89 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
90 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
91 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
92 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
93 [SERVICE_FAILED] = UNIT_FAILED,
94 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
95};
96
97static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
98static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
99static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
100
101static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
102static void service_enter_reload_by_notify(Service *s);
103
104static void service_init(Unit *u) {
105 Service *s = SERVICE(u);
106
107 assert(u);
108 assert(u->load_state == UNIT_STUB);
109
110 s->timeout_start_usec = u->manager->default_timeout_start_usec;
111 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
112 s->restart_usec = u->manager->default_restart_usec;
113 s->runtime_max_usec = USEC_INFINITY;
114 s->type = _SERVICE_TYPE_INVALID;
115 s->socket_fd = -1;
116 s->stdin_fd = s->stdout_fd = s->stderr_fd = -1;
117 s->guess_main_pid = true;
118
119 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
120}
121
122static void service_unwatch_control_pid(Service *s) {
123 assert(s);
124
125 if (s->control_pid <= 0)
126 return;
127
128 unit_unwatch_pid(UNIT(s), s->control_pid);
129 s->control_pid = 0;
130}
131
132static void service_unwatch_main_pid(Service *s) {
133 assert(s);
134
135 if (s->main_pid <= 0)
136 return;
137
138 unit_unwatch_pid(UNIT(s), s->main_pid);
139 s->main_pid = 0;
140}
141
142static void service_unwatch_pid_file(Service *s) {
143 if (!s->pid_file_pathspec)
144 return;
145
146 log_unit_debug(UNIT(s), "Stopping watch for PID file %s", s->pid_file_pathspec->path);
147 path_spec_unwatch(s->pid_file_pathspec);
148 path_spec_done(s->pid_file_pathspec);
149 s->pid_file_pathspec = mfree(s->pid_file_pathspec);
150}
151
152static int service_set_main_pid(Service *s, pid_t pid) {
153 pid_t ppid;
154
155 assert(s);
156
157 if (pid <= 1)
158 return -EINVAL;
159
160 if (pid == getpid())
161 return -EINVAL;
162
163 if (s->main_pid == pid && s->main_pid_known)
164 return 0;
165
166 if (s->main_pid != pid) {
167 service_unwatch_main_pid(s);
168 exec_status_start(&s->main_exec_status, pid);
169 }
170
171 s->main_pid = pid;
172 s->main_pid_known = true;
173
174 if (get_process_ppid(pid, &ppid) >= 0 && ppid != getpid()) {
175 log_unit_warning(UNIT(s), "Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", pid);
176 s->main_pid_alien = true;
177 } else
178 s->main_pid_alien = false;
179
180 return 0;
181}
182
183void service_close_socket_fd(Service *s) {
184 assert(s);
185
186 /* Undo the effect of service_set_socket_fd(). */
187
188 s->socket_fd = asynchronous_close(s->socket_fd);
189
190 if (UNIT_ISSET(s->accept_socket)) {
191 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
192 unit_ref_unset(&s->accept_socket);
193 }
194}
195
196static void service_stop_watchdog(Service *s) {
197 assert(s);
198
199 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
200 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
201}
202
203static usec_t service_get_watchdog_usec(Service *s) {
204 assert(s);
205
206 if (s->watchdog_override_enable)
207 return s->watchdog_override_usec;
208 else
209 return s->watchdog_usec;
210}
211
212static void service_start_watchdog(Service *s) {
213 int r;
214 usec_t watchdog_usec;
215
216 assert(s);
217
218 watchdog_usec = service_get_watchdog_usec(s);
219 if (watchdog_usec == 0 || watchdog_usec == USEC_INFINITY)
220 return;
221
222 if (s->watchdog_event_source) {
223 r = sd_event_source_set_time(s->watchdog_event_source, usec_add(s->watchdog_timestamp.monotonic, watchdog_usec));
224 if (r < 0) {
225 log_unit_warning_errno(UNIT(s), r, "Failed to reset watchdog timer: %m");
226 return;
227 }
228
229 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
230 } else {
231 r = sd_event_add_time(
232 UNIT(s)->manager->event,
233 &s->watchdog_event_source,
234 CLOCK_MONOTONIC,
235 usec_add(s->watchdog_timestamp.monotonic, watchdog_usec), 0,
236 service_dispatch_watchdog, s);
237 if (r < 0) {
238 log_unit_warning_errno(UNIT(s), r, "Failed to add watchdog timer: %m");
239 return;
240 }
241
242 (void) sd_event_source_set_description(s->watchdog_event_source, "service-watchdog");
243
244 /* Let's process everything else which might be a sign
245 * of living before we consider a service died. */
246 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
247 }
248
249 if (r < 0)
250 log_unit_warning_errno(UNIT(s), r, "Failed to install watchdog timer: %m");
251}
252
253static void service_reset_watchdog(Service *s) {
254 assert(s);
255
256 dual_timestamp_get(&s->watchdog_timestamp);
257 service_start_watchdog(s);
258}
259
260static void service_reset_watchdog_timeout(Service *s, usec_t watchdog_override_usec) {
261 assert(s);
262
263 s->watchdog_override_enable = true;
264 s->watchdog_override_usec = watchdog_override_usec;
265 service_reset_watchdog(s);
266
267 log_unit_debug(UNIT(s), "watchdog_usec="USEC_FMT, s->watchdog_usec);
268 log_unit_debug(UNIT(s), "watchdog_override_usec="USEC_FMT, s->watchdog_override_usec);
269}
270
271static void service_fd_store_unlink(ServiceFDStore *fs) {
272
273 if (!fs)
274 return;
275
276 if (fs->service) {
277 assert(fs->service->n_fd_store > 0);
278 LIST_REMOVE(fd_store, fs->service->fd_store, fs);
279 fs->service->n_fd_store--;
280 }
281
282 if (fs->event_source) {
283 sd_event_source_set_enabled(fs->event_source, SD_EVENT_OFF);
284 sd_event_source_unref(fs->event_source);
285 }
286
287 free(fs->fdname);
288 safe_close(fs->fd);
289 free(fs);
290}
291
292static void service_release_fd_store(Service *s) {
293 assert(s);
294
295 log_unit_debug(UNIT(s), "Releasing all stored fds");
296 while (s->fd_store)
297 service_fd_store_unlink(s->fd_store);
298
299 assert(s->n_fd_store == 0);
300}
301
302static void service_release_resources(Unit *u, bool inactive) {
303 Service *s = SERVICE(u);
304
305 assert(s);
306
307 if (!s->fd_store && s->stdin_fd < 0 && s->stdout_fd < 0 && s->stderr_fd < 0)
308 return;
309
310 log_unit_debug(u, "Releasing resources.");
311
312 s->stdin_fd = safe_close(s->stdin_fd);
313 s->stdout_fd = safe_close(s->stdout_fd);
314 s->stderr_fd = safe_close(s->stderr_fd);
315
316 if (inactive)
317 service_release_fd_store(s);
318}
319
320static void service_done(Unit *u) {
321 Service *s = SERVICE(u);
322
323 assert(s);
324
325 s->pid_file = mfree(s->pid_file);
326 s->status_text = mfree(s->status_text);
327
328 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
329 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
330 s->control_command = NULL;
331 s->main_command = NULL;
332
333 dynamic_creds_unref(&s->dynamic_creds);
334
335 exit_status_set_free(&s->restart_prevent_status);
336 exit_status_set_free(&s->restart_force_status);
337 exit_status_set_free(&s->success_status);
338
339 /* This will leak a process, but at least no memory or any of
340 * our resources */
341 service_unwatch_main_pid(s);
342 service_unwatch_control_pid(s);
343 service_unwatch_pid_file(s);
344
345 if (s->bus_name) {
346 unit_unwatch_bus_name(u, s->bus_name);
347 s->bus_name = mfree(s->bus_name);
348 }
349
350 s->bus_name_owner = mfree(s->bus_name_owner);
351
352 service_close_socket_fd(s);
353 s->peer = socket_peer_unref(s->peer);
354
355 unit_ref_unset(&s->accept_socket);
356
357 service_stop_watchdog(s);
358
359 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
360
361 service_release_resources(u, true);
362}
363
364static int on_fd_store_io(sd_event_source *e, int fd, uint32_t revents, void *userdata) {
365 ServiceFDStore *fs = userdata;
366
367 assert(e);
368 assert(fs);
369
370 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
371 log_unit_debug(UNIT(fs->service),
372 "Received %s on stored fd %d (%s), closing.",
373 revents & EPOLLERR ? "EPOLLERR" : "EPOLLHUP",
374 fs->fd, strna(fs->fdname));
375 service_fd_store_unlink(fs);
376 return 0;
377}
378
379static int service_add_fd_store(Service *s, int fd, const char *name) {
380 ServiceFDStore *fs;
381 int r;
382
383 /* fd is always consumed if we return >= 0 */
384
385 assert(s);
386 assert(fd >= 0);
387
388 if (s->n_fd_store >= s->n_fd_store_max)
389 return -EXFULL; /* Our store is full.
390 * Use this errno rather than E[NM]FILE to distinguish from
391 * the case where systemd itself hits the file limit. */
392
393 LIST_FOREACH(fd_store, fs, s->fd_store) {
394 r = same_fd(fs->fd, fd);
395 if (r < 0)
396 return r;
397 if (r > 0) {
398 safe_close(fd);
399 return 0; /* fd already included */
400 }
401 }
402
403 fs = new0(ServiceFDStore, 1);
404 if (!fs)
405 return -ENOMEM;
406
407 fs->fd = fd;
408 fs->service = s;
409 fs->fdname = strdup(name ?: "stored");
410 if (!fs->fdname) {
411 free(fs);
412 return -ENOMEM;
413 }
414
415 r = sd_event_add_io(UNIT(s)->manager->event, &fs->event_source, fd, 0, on_fd_store_io, fs);
416 if (r < 0) {
417 free(fs->fdname);
418 free(fs);
419 return r;
420 }
421
422 (void) sd_event_source_set_description(fs->event_source, "service-fd-store");
423
424 LIST_PREPEND(fd_store, s->fd_store, fs);
425 s->n_fd_store++;
426
427 return 1; /* fd newly stored */
428}
429
430static int service_add_fd_store_set(Service *s, FDSet *fds, const char *name) {
431 int r;
432
433 assert(s);
434
435 while (fdset_size(fds) > 0) {
436 _cleanup_close_ int fd = -1;
437
438 fd = fdset_steal_first(fds);
439 if (fd < 0)
440 break;
441
442 r = service_add_fd_store(s, fd, name);
443 if (r == -EXFULL)
444 return log_unit_warning_errno(UNIT(s), r,
445 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
446 s->n_fd_store_max);
447 if (r < 0)
448 return log_unit_error_errno(UNIT(s), r, "Failed to add fd to store: %m");
449 if (r > 0)
450 log_unit_debug(UNIT(s), "Added fd %u (%s) to fd store.", fd, strna(name));
451 fd = -1;
452 }
453
454 return 0;
455}
456
457static int service_arm_timer(Service *s, usec_t usec) {
458 int r;
459
460 assert(s);
461
462 if (s->timer_event_source) {
463 r = sd_event_source_set_time(s->timer_event_source, usec);
464 if (r < 0)
465 return r;
466
467 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
468 }
469
470 if (usec == USEC_INFINITY)
471 return 0;
472
473 r = sd_event_add_time(
474 UNIT(s)->manager->event,
475 &s->timer_event_source,
476 CLOCK_MONOTONIC,
477 usec, 0,
478 service_dispatch_timer, s);
479 if (r < 0)
480 return r;
481
482 (void) sd_event_source_set_description(s->timer_event_source, "service-timer");
483
484 return 0;
485}
486
487static int service_verify(Service *s) {
488 assert(s);
489
490 if (UNIT(s)->load_state != UNIT_LOADED)
491 return 0;
492
493 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
494 log_unit_error(UNIT(s), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
495 return -EINVAL;
496 }
497
498 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
499 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
500 return -EINVAL;
501 }
502
503 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
504 log_unit_error(UNIT(s), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
505 return -EINVAL;
506 }
507
508 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
509 log_unit_error(UNIT(s), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
510 return -EINVAL;
511 }
512
513 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
514 log_unit_error(UNIT(s), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
515 return -EINVAL;
516 }
517
518 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
519 log_unit_error(UNIT(s), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
520 return -EINVAL;
521 }
522
523 if (s->type == SERVICE_DBUS && !s->bus_name) {
524 log_unit_error(UNIT(s), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
525 return -EINVAL;
526 }
527
528 if (s->bus_name && s->type != SERVICE_DBUS)
529 log_unit_warning(UNIT(s), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
530
531 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
532 log_unit_error(UNIT(s), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
533 return -EINVAL;
534 }
535
536 if (s->usb_function_descriptors && !s->usb_function_strings)
537 log_unit_warning(UNIT(s), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
538
539 if (!s->usb_function_descriptors && s->usb_function_strings)
540 log_unit_warning(UNIT(s), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
541
542 if (s->runtime_max_usec != USEC_INFINITY && s->type == SERVICE_ONESHOT)
543 log_unit_warning(UNIT(s), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
544
545 return 0;
546}
547
548static int service_add_default_dependencies(Service *s) {
549 int r;
550
551 assert(s);
552
553 if (!UNIT(s)->default_dependencies)
554 return 0;
555
556 /* Add a number of automatic dependencies useful for the
557 * majority of services. */
558
559 if (MANAGER_IS_SYSTEM(UNIT(s)->manager)) {
560 /* First, pull in the really early boot stuff, and
561 * require it, so that we fail if we can't acquire
562 * it. */
563
564 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true);
565 if (r < 0)
566 return r;
567 } else {
568
569 /* In the --user instance there's no sysinit.target,
570 * in that case require basic.target instead. */
571
572 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
573 if (r < 0)
574 return r;
575 }
576
577 /* Second, if the rest of the base system is in the same
578 * transaction, order us after it, but do not pull it in or
579 * even require it. */
580 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true);
581 if (r < 0)
582 return r;
583
584 /* Third, add us in for normal shutdown. */
585 return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
586}
587
588static void service_fix_output(Service *s) {
589 assert(s);
590
591 /* If nothing has been explicitly configured, patch default
592 * output in. If input is socket/tty we avoid this however,
593 * since in that case we want output to default to the same
594 * place as we read input from. */
595
596 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
597 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
598 s->exec_context.std_input == EXEC_INPUT_NULL)
599 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
600
601 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
602 s->exec_context.std_input == EXEC_INPUT_NULL)
603 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
604}
605
606static int service_setup_bus_name(Service *s) {
607 int r;
608
609 assert(s);
610
611 if (!s->bus_name)
612 return 0;
613
614 r = unit_add_dependency_by_name(UNIT(s), UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true);
615 if (r < 0)
616 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
617
618 /* Regardless if kdbus is used or not, we always want to be ordered against dbus.socket if both are in the transaction. */
619 r = unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_DBUS_SOCKET, NULL, true);
620 if (r < 0)
621 return log_unit_error_errno(UNIT(s), r, "Failed to add dependency on " SPECIAL_DBUS_SOCKET ": %m");
622
623 r = unit_watch_bus_name(UNIT(s), s->bus_name);
624 if (r == -EEXIST)
625 return log_unit_error_errno(UNIT(s), r, "Two services allocated for the same bus name %s, refusing operation.", s->bus_name);
626 if (r < 0)
627 return log_unit_error_errno(UNIT(s), r, "Cannot watch bus name %s: %m", s->bus_name);
628
629 return 0;
630}
631
632static int service_add_extras(Service *s) {
633 int r;
634
635 assert(s);
636
637 if (s->type == _SERVICE_TYPE_INVALID) {
638 /* Figure out a type automatically */
639 if (s->bus_name)
640 s->type = SERVICE_DBUS;
641 else if (s->exec_command[SERVICE_EXEC_START])
642 s->type = SERVICE_SIMPLE;
643 else
644 s->type = SERVICE_ONESHOT;
645 }
646
647 /* Oneshot services have disabled start timeout by default */
648 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
649 s->timeout_start_usec = USEC_INFINITY;
650
651 service_fix_output(s);
652
653 r = unit_patch_contexts(UNIT(s));
654 if (r < 0)
655 return r;
656
657 r = unit_add_exec_dependencies(UNIT(s), &s->exec_context);
658 if (r < 0)
659 return r;
660
661 r = unit_set_default_slice(UNIT(s));
662 if (r < 0)
663 return r;
664
665 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
666 s->notify_access = NOTIFY_MAIN;
667
668 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
669 s->notify_access = NOTIFY_MAIN;
670
671 r = service_add_default_dependencies(s);
672 if (r < 0)
673 return r;
674
675 r = service_setup_bus_name(s);
676 if (r < 0)
677 return r;
678
679 return 0;
680}
681
682static int service_load(Unit *u) {
683 Service *s = SERVICE(u);
684 int r;
685
686 assert(s);
687
688 /* Load a .service file */
689 r = unit_load_fragment(u);
690 if (r < 0)
691 return r;
692
693 /* Still nothing found? Then let's give up */
694 if (u->load_state == UNIT_STUB)
695 return -ENOENT;
696
697 /* This is a new unit? Then let's add in some extras */
698 if (u->load_state == UNIT_LOADED) {
699
700 /* We were able to load something, then let's add in
701 * the dropin directories. */
702 r = unit_load_dropin(u);
703 if (r < 0)
704 return r;
705
706 /* This is a new unit? Then let's add in some
707 * extras */
708 r = service_add_extras(s);
709 if (r < 0)
710 return r;
711 }
712
713 return service_verify(s);
714}
715
716static void service_dump(Unit *u, FILE *f, const char *prefix) {
717 ServiceExecCommand c;
718 Service *s = SERVICE(u);
719 const char *prefix2;
720
721 assert(s);
722
723 prefix = strempty(prefix);
724 prefix2 = strjoina(prefix, "\t");
725
726 fprintf(f,
727 "%sService State: %s\n"
728 "%sResult: %s\n"
729 "%sReload Result: %s\n"
730 "%sPermissionsStartOnly: %s\n"
731 "%sRootDirectoryStartOnly: %s\n"
732 "%sRemainAfterExit: %s\n"
733 "%sGuessMainPID: %s\n"
734 "%sType: %s\n"
735 "%sRestart: %s\n"
736 "%sNotifyAccess: %s\n"
737 "%sNotifyState: %s\n",
738 prefix, service_state_to_string(s->state),
739 prefix, service_result_to_string(s->result),
740 prefix, service_result_to_string(s->reload_result),
741 prefix, yes_no(s->permissions_start_only),
742 prefix, yes_no(s->root_directory_start_only),
743 prefix, yes_no(s->remain_after_exit),
744 prefix, yes_no(s->guess_main_pid),
745 prefix, service_type_to_string(s->type),
746 prefix, service_restart_to_string(s->restart),
747 prefix, notify_access_to_string(s->notify_access),
748 prefix, notify_state_to_string(s->notify_state));
749
750 if (s->control_pid > 0)
751 fprintf(f,
752 "%sControl PID: "PID_FMT"\n",
753 prefix, s->control_pid);
754
755 if (s->main_pid > 0)
756 fprintf(f,
757 "%sMain PID: "PID_FMT"\n"
758 "%sMain PID Known: %s\n"
759 "%sMain PID Alien: %s\n",
760 prefix, s->main_pid,
761 prefix, yes_no(s->main_pid_known),
762 prefix, yes_no(s->main_pid_alien));
763
764 if (s->pid_file)
765 fprintf(f,
766 "%sPIDFile: %s\n",
767 prefix, s->pid_file);
768
769 if (s->bus_name)
770 fprintf(f,
771 "%sBusName: %s\n"
772 "%sBus Name Good: %s\n",
773 prefix, s->bus_name,
774 prefix, yes_no(s->bus_name_good));
775
776 if (UNIT_ISSET(s->accept_socket))
777 fprintf(f,
778 "%sAccept Socket: %s\n",
779 prefix, UNIT_DEREF(s->accept_socket)->id);
780
781 kill_context_dump(&s->kill_context, f, prefix);
782 exec_context_dump(&s->exec_context, f, prefix);
783
784 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
785
786 if (!s->exec_command[c])
787 continue;
788
789 fprintf(f, "%s-> %s:\n",
790 prefix, service_exec_command_to_string(c));
791
792 exec_command_dump_list(s->exec_command[c], f, prefix2);
793 }
794
795 if (s->status_text)
796 fprintf(f, "%sStatus Text: %s\n",
797 prefix, s->status_text);
798
799 if (s->n_fd_store_max > 0)
800 fprintf(f,
801 "%sFile Descriptor Store Max: %u\n"
802 "%sFile Descriptor Store Current: %u\n",
803 prefix, s->n_fd_store_max,
804 prefix, s->n_fd_store);
805}
806
807static int service_load_pid_file(Service *s, bool may_warn) {
808 _cleanup_free_ char *k = NULL;
809 int r;
810 pid_t pid;
811
812 assert(s);
813
814 if (!s->pid_file)
815 return -ENOENT;
816
817 r = read_one_line_file(s->pid_file, &k);
818 if (r < 0) {
819 if (may_warn)
820 log_unit_info_errno(UNIT(s), r, "PID file %s not readable (yet?) after %s: %m", s->pid_file, service_state_to_string(s->state));
821 return r;
822 }
823
824 r = parse_pid(k, &pid);
825 if (r < 0) {
826 if (may_warn)
827 log_unit_info_errno(UNIT(s), r, "Failed to read PID from file %s: %m", s->pid_file);
828 return r;
829 }
830
831 if (!pid_is_alive(pid)) {
832 if (may_warn)
833 log_unit_info(UNIT(s), "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
834 return -ESRCH;
835 }
836
837 if (s->main_pid_known) {
838 if (pid == s->main_pid)
839 return 0;
840
841 log_unit_debug(UNIT(s), "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
842
843 service_unwatch_main_pid(s);
844 s->main_pid_known = false;
845 } else
846 log_unit_debug(UNIT(s), "Main PID loaded: "PID_FMT, pid);
847
848 r = service_set_main_pid(s, pid);
849 if (r < 0)
850 return r;
851
852 r = unit_watch_pid(UNIT(s), pid);
853 if (r < 0) /* FIXME: we need to do something here */
854 return log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" for service: %m", pid);
855
856 return 0;
857}
858
859static void service_search_main_pid(Service *s) {
860 pid_t pid = 0;
861 int r;
862
863 assert(s);
864
865 /* If we know it anyway, don't ever fallback to unreliable
866 * heuristics */
867 if (s->main_pid_known)
868 return;
869
870 if (!s->guess_main_pid)
871 return;
872
873 assert(s->main_pid <= 0);
874
875 if (unit_search_main_pid(UNIT(s), &pid) < 0)
876 return;
877
878 log_unit_debug(UNIT(s), "Main PID guessed: "PID_FMT, pid);
879 if (service_set_main_pid(s, pid) < 0)
880 return;
881
882 r = unit_watch_pid(UNIT(s), pid);
883 if (r < 0)
884 /* FIXME: we need to do something here */
885 log_unit_warning_errno(UNIT(s), r, "Failed to watch PID "PID_FMT" from: %m", pid);
886}
887
888static void service_set_state(Service *s, ServiceState state) {
889 ServiceState old_state;
890 const UnitActiveState *table;
891
892 assert(s);
893
894 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
895
896 old_state = s->state;
897 s->state = state;
898
899 service_unwatch_pid_file(s);
900
901 if (!IN_SET(state,
902 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
903 SERVICE_RUNNING,
904 SERVICE_RELOAD,
905 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
906 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
907 SERVICE_AUTO_RESTART))
908 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
909
910 if (!IN_SET(state,
911 SERVICE_START, SERVICE_START_POST,
912 SERVICE_RUNNING, SERVICE_RELOAD,
913 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
914 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
915 service_unwatch_main_pid(s);
916 s->main_command = NULL;
917 }
918
919 if (!IN_SET(state,
920 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
921 SERVICE_RELOAD,
922 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
923 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
924 service_unwatch_control_pid(s);
925 s->control_command = NULL;
926 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
927 }
928
929 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
930 unit_unwatch_all_pids(UNIT(s));
931
932 if (!IN_SET(state,
933 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
934 SERVICE_RUNNING, SERVICE_RELOAD,
935 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
936 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
937 !(state == SERVICE_DEAD && UNIT(s)->job))
938 service_close_socket_fd(s);
939
940 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
941 service_stop_watchdog(s);
942
943 /* For the inactive states unit_notify() will trim the cgroup,
944 * but for exit we have to do that ourselves... */
945 if (state == SERVICE_EXITED && !MANAGER_IS_RELOADING(UNIT(s)->manager))
946 unit_prune_cgroup(UNIT(s));
947
948 /* For remain_after_exit services, let's see if we can "release" the
949 * hold on the console, since unit_notify() only does that in case of
950 * change of state */
951 if (state == SERVICE_EXITED &&
952 s->remain_after_exit &&
953 UNIT(s)->manager->n_on_console > 0) {
954
955 ExecContext *ec;
956
957 ec = unit_get_exec_context(UNIT(s));
958 if (ec && exec_context_may_touch_console(ec)) {
959 Manager *m = UNIT(s)->manager;
960
961 m->n_on_console--;
962 if (m->n_on_console == 0)
963 /* unset no_console_output flag, since the console is free */
964 m->no_console_output = false;
965 }
966 }
967
968 if (old_state != state)
969 log_unit_debug(UNIT(s), "Changed %s -> %s", service_state_to_string(old_state), service_state_to_string(state));
970
971 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
972}
973
974static usec_t service_coldplug_timeout(Service *s) {
975 assert(s);
976
977 switch (s->deserialized_state) {
978
979 case SERVICE_START_PRE:
980 case SERVICE_START:
981 case SERVICE_START_POST:
982 case SERVICE_RELOAD:
983 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_start_usec);
984
985 case SERVICE_RUNNING:
986 return usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec);
987
988 case SERVICE_STOP:
989 case SERVICE_STOP_SIGABRT:
990 case SERVICE_STOP_SIGTERM:
991 case SERVICE_STOP_SIGKILL:
992 case SERVICE_STOP_POST:
993 case SERVICE_FINAL_SIGTERM:
994 case SERVICE_FINAL_SIGKILL:
995 return usec_add(UNIT(s)->state_change_timestamp.monotonic, s->timeout_stop_usec);
996
997 case SERVICE_AUTO_RESTART:
998 return usec_add(UNIT(s)->inactive_enter_timestamp.monotonic, s->restart_usec);
999
1000 default:
1001 return USEC_INFINITY;
1002 }
1003}
1004
1005static int service_coldplug(Unit *u) {
1006 Service *s = SERVICE(u);
1007 int r;
1008
1009 assert(s);
1010 assert(s->state == SERVICE_DEAD);
1011
1012 if (s->deserialized_state == s->state)
1013 return 0;
1014
1015 r = service_arm_timer(s, service_coldplug_timeout(s));
1016 if (r < 0)
1017 return r;
1018
1019 if (s->main_pid > 0 &&
1020 pid_is_unwaited(s->main_pid) &&
1021 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1022 IN_SET(s->deserialized_state,
1023 SERVICE_START, SERVICE_START_POST,
1024 SERVICE_RUNNING, SERVICE_RELOAD,
1025 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1026 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1027 r = unit_watch_pid(UNIT(s), s->main_pid);
1028 if (r < 0)
1029 return r;
1030 }
1031
1032 if (s->control_pid > 0 &&
1033 pid_is_unwaited(s->control_pid) &&
1034 IN_SET(s->deserialized_state,
1035 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1036 SERVICE_RELOAD,
1037 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1038 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1039 r = unit_watch_pid(UNIT(s), s->control_pid);
1040 if (r < 0)
1041 return r;
1042 }
1043
1044 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1045 unit_watch_all_pids(UNIT(s));
1046
1047 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1048 service_start_watchdog(s);
1049
1050 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1051 (void) unit_setup_dynamic_creds(u);
1052
1053 if (UNIT_ISSET(s->accept_socket)) {
1054 Socket* socket = SOCKET(UNIT_DEREF(s->accept_socket));
1055
1056 if (socket->max_connections_per_source > 0) {
1057 SocketPeer *peer;
1058
1059 /* Make a best-effort attempt at bumping the connection count */
1060 if (socket_acquire_peer(socket, s->socket_fd, &peer) > 0) {
1061 socket_peer_unref(s->peer);
1062 s->peer = peer;
1063 }
1064 }
1065 }
1066
1067 service_set_state(s, s->deserialized_state);
1068 return 0;
1069}
1070
1071static int service_collect_fds(Service *s, int **fds, char ***fd_names) {
1072 _cleanup_strv_free_ char **rfd_names = NULL;
1073 _cleanup_free_ int *rfds = NULL;
1074 int rn_fds = 0, r;
1075
1076 assert(s);
1077 assert(fds);
1078 assert(fd_names);
1079
1080 if (s->socket_fd >= 0) {
1081
1082 /* Pass the per-connection socket */
1083
1084 rfds = new(int, 1);
1085 if (!rfds)
1086 return -ENOMEM;
1087 rfds[0] = s->socket_fd;
1088
1089 rfd_names = strv_new("connection", NULL);
1090 if (!rfd_names)
1091 return -ENOMEM;
1092
1093 rn_fds = 1;
1094 } else {
1095 Iterator i;
1096 Unit *u;
1097
1098 /* Pass all our configured sockets for singleton services */
1099
1100 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1101 _cleanup_free_ int *cfds = NULL;
1102 Socket *sock;
1103 int cn_fds;
1104
1105 if (u->type != UNIT_SOCKET)
1106 continue;
1107
1108 sock = SOCKET(u);
1109
1110 cn_fds = socket_collect_fds(sock, &cfds);
1111 if (cn_fds < 0)
1112 return cn_fds;
1113
1114 if (cn_fds <= 0)
1115 continue;
1116
1117 if (!rfds) {
1118 rfds = cfds;
1119 rn_fds = cn_fds;
1120
1121 cfds = NULL;
1122 } else {
1123 int *t;
1124
1125 t = realloc(rfds, (rn_fds + cn_fds) * sizeof(int));
1126 if (!t)
1127 return -ENOMEM;
1128
1129 memcpy(t + rn_fds, cfds, cn_fds * sizeof(int));
1130
1131 rfds = t;
1132 rn_fds += cn_fds;
1133 }
1134
1135 r = strv_extend_n(&rfd_names, socket_fdname(sock), cn_fds);
1136 if (r < 0)
1137 return r;
1138 }
1139 }
1140
1141 if (s->n_fd_store > 0) {
1142 ServiceFDStore *fs;
1143 char **nl;
1144 int *t;
1145
1146 t = realloc(rfds, (rn_fds + s->n_fd_store) * sizeof(int));
1147 if (!t)
1148 return -ENOMEM;
1149
1150 rfds = t;
1151
1152 nl = realloc(rfd_names, (rn_fds + s->n_fd_store + 1) * sizeof(char*));
1153 if (!nl)
1154 return -ENOMEM;
1155
1156 rfd_names = nl;
1157
1158 LIST_FOREACH(fd_store, fs, s->fd_store) {
1159 rfds[rn_fds] = fs->fd;
1160 rfd_names[rn_fds] = strdup(strempty(fs->fdname));
1161 if (!rfd_names[rn_fds])
1162 return -ENOMEM;
1163
1164 rn_fds++;
1165 }
1166
1167 rfd_names[rn_fds] = NULL;
1168 }
1169
1170 *fds = rfds;
1171 *fd_names = rfd_names;
1172
1173 rfds = NULL;
1174 rfd_names = NULL;
1175
1176 return rn_fds;
1177}
1178
1179static bool service_exec_needs_notify_socket(Service *s, ExecFlags flags) {
1180 assert(s);
1181
1182 /* Notifications are accepted depending on the process and
1183 * the access setting of the service:
1184 * process: \ access: NONE MAIN EXEC ALL
1185 * main no yes yes yes
1186 * control no no yes yes
1187 * other (forked) no no no yes */
1188
1189 if (flags & EXEC_IS_CONTROL)
1190 /* A control process */
1191 return IN_SET(s->notify_access, NOTIFY_EXEC, NOTIFY_ALL);
1192
1193 /* We only spawn main processes and control processes, so any
1194 * process that is not a control process is a main process */
1195 return s->notify_access != NOTIFY_NONE;
1196}
1197
1198static int service_spawn(
1199 Service *s,
1200 ExecCommand *c,
1201 usec_t timeout,
1202 ExecFlags flags,
1203 pid_t *_pid) {
1204
1205 _cleanup_strv_free_ char **final_env = NULL, **our_env = NULL, **fd_names = NULL;
1206 _cleanup_free_ int *fds = NULL;
1207 unsigned n_fds = 0, n_env = 0;
1208 const char *path;
1209 pid_t pid;
1210
1211 ExecParameters exec_params = {
1212 .flags = flags,
1213 .stdin_fd = -1,
1214 .stdout_fd = -1,
1215 .stderr_fd = -1,
1216 };
1217
1218 int r;
1219
1220 assert(s);
1221 assert(c);
1222 assert(_pid);
1223
1224 if (flags & EXEC_IS_CONTROL) {
1225 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1226 if (s->permissions_start_only)
1227 exec_params.flags &= ~EXEC_APPLY_PERMISSIONS;
1228 if (s->root_directory_start_only)
1229 exec_params.flags &= ~EXEC_APPLY_CHROOT;
1230 }
1231
1232 (void) unit_realize_cgroup(UNIT(s));
1233 if (s->reset_cpu_usage) {
1234 (void) unit_reset_cpu_usage(UNIT(s));
1235 s->reset_cpu_usage = false;
1236 }
1237
1238 r = unit_setup_exec_runtime(UNIT(s));
1239 if (r < 0)
1240 return r;
1241
1242 r = unit_setup_dynamic_creds(UNIT(s));
1243 if (r < 0)
1244 return r;
1245
1246 if ((flags & EXEC_PASS_FDS) ||
1247 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1248 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1249 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1250
1251 r = service_collect_fds(s, &fds, &fd_names);
1252 if (r < 0)
1253 return r;
1254
1255 n_fds = r;
1256 log_unit_debug(UNIT(s), "Passing %i fds to service", n_fds);
1257 }
1258
1259 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), timeout));
1260 if (r < 0)
1261 return r;
1262
1263 our_env = new0(char*, 9);
1264 if (!our_env)
1265 return -ENOMEM;
1266
1267 if (service_exec_needs_notify_socket(s, flags))
1268 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0)
1269 return -ENOMEM;
1270
1271 if (s->main_pid > 0)
1272 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0)
1273 return -ENOMEM;
1274
1275 if (MANAGER_IS_USER(UNIT(s)->manager))
1276 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0)
1277 return -ENOMEM;
1278
1279 if (s->socket_fd >= 0) {
1280 union sockaddr_union sa;
1281 socklen_t salen = sizeof(sa);
1282
1283 r = getpeername(s->socket_fd, &sa.sa, &salen);
1284 if (r < 0) {
1285 r = -errno;
1286
1287 /* ENOTCONN is legitimate if the endpoint disappeared on shutdown.
1288 * This connection is over, but the socket unit lives on. */
1289 if (r != -ENOTCONN || !IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST))
1290 return r;
1291 }
1292
1293 if (r == 0 && IN_SET(sa.sa.sa_family, AF_INET, AF_INET6, AF_VSOCK)) {
1294 _cleanup_free_ char *addr = NULL;
1295 char *t;
1296 unsigned port;
1297
1298 r = sockaddr_pretty(&sa.sa, salen, true, false, &addr);
1299 if (r < 0)
1300 return r;
1301
1302 t = strappend("REMOTE_ADDR=", addr);
1303 if (!t)
1304 return -ENOMEM;
1305 our_env[n_env++] = t;
1306
1307 r = sockaddr_port(&sa.sa, &port);
1308 if (r < 0)
1309 return r;
1310
1311 if (asprintf(&t, "REMOTE_PORT=%u", port) < 0)
1312 return -ENOMEM;
1313 our_env[n_env++] = t;
1314 }
1315 }
1316
1317 if (flags & EXEC_SETENV_RESULT) {
1318 if (asprintf(our_env + n_env++, "SERVICE_RESULT=%s", service_result_to_string(s->result)) < 0)
1319 return -ENOMEM;
1320
1321 if (s->main_exec_status.pid > 0 &&
1322 dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1323 if (asprintf(our_env + n_env++, "EXIT_CODE=%s", sigchld_code_to_string(s->main_exec_status.code)) < 0)
1324 return -ENOMEM;
1325
1326 if (s->main_exec_status.code == CLD_EXITED)
1327 r = asprintf(our_env + n_env++, "EXIT_STATUS=%i", s->main_exec_status.status);
1328 else
1329 r = asprintf(our_env + n_env++, "EXIT_STATUS=%s", signal_to_string(s->main_exec_status.status));
1330 if (r < 0)
1331 return -ENOMEM;
1332 }
1333 }
1334
1335 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1336 if (!final_env)
1337 return -ENOMEM;
1338
1339 if ((flags & EXEC_IS_CONTROL) && UNIT(s)->cgroup_path) {
1340 path = strjoina(UNIT(s)->cgroup_path, "/control");
1341 (void) cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1342 } else
1343 path = UNIT(s)->cgroup_path;
1344
1345 exec_params.flags |= MANAGER_IS_SYSTEM(UNIT(s)->manager) ? EXEC_NEW_KEYRING : 0;
1346 exec_params.argv = c->argv;
1347 exec_params.environment = final_env;
1348 exec_params.fds = fds;
1349 exec_params.fd_names = fd_names;
1350 exec_params.n_fds = n_fds;
1351 exec_params.confirm_spawn = manager_get_confirm_spawn(UNIT(s)->manager);
1352 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1353 exec_params.cgroup_path = path;
1354 exec_params.cgroup_delegate = s->cgroup_context.delegate;
1355 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1356 exec_params.watchdog_usec = s->watchdog_usec;
1357 exec_params.selinux_context_net = s->socket_fd_selinux_context_net;
1358 if (s->type == SERVICE_IDLE)
1359 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1360 exec_params.stdin_fd = s->stdin_fd;
1361 exec_params.stdout_fd = s->stdout_fd;
1362 exec_params.stderr_fd = s->stderr_fd;
1363
1364 r = exec_spawn(UNIT(s),
1365 c,
1366 &s->exec_context,
1367 &exec_params,
1368 s->exec_runtime,
1369 &s->dynamic_creds,
1370 &pid);
1371 if (r < 0)
1372 return r;
1373
1374 r = unit_watch_pid(UNIT(s), pid);
1375 if (r < 0) /* FIXME: we need to do something here */
1376 return r;
1377
1378 *_pid = pid;
1379
1380 return 0;
1381}
1382
1383static int main_pid_good(Service *s) {
1384 assert(s);
1385
1386 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1387 * don't know */
1388
1389 /* If we know the pid file, then let's just check if it is
1390 * still valid */
1391 if (s->main_pid_known) {
1392
1393 /* If it's an alien child let's check if it is still
1394 * alive ... */
1395 if (s->main_pid_alien && s->main_pid > 0)
1396 return pid_is_alive(s->main_pid);
1397
1398 /* .. otherwise assume we'll get a SIGCHLD for it,
1399 * which we really should wait for to collect exit
1400 * status and code */
1401 return s->main_pid > 0;
1402 }
1403
1404 /* We don't know the pid */
1405 return -EAGAIN;
1406}
1407
1408_pure_ static int control_pid_good(Service *s) {
1409 assert(s);
1410
1411 return s->control_pid > 0;
1412}
1413
1414static int cgroup_good(Service *s) {
1415 int r;
1416
1417 assert(s);
1418
1419 if (!UNIT(s)->cgroup_path)
1420 return 0;
1421
1422 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path);
1423 if (r < 0)
1424 return r;
1425
1426 return !r;
1427}
1428
1429static bool service_shall_restart(Service *s) {
1430 assert(s);
1431
1432 /* Don't restart after manual stops */
1433 if (s->forbid_restart)
1434 return false;
1435
1436 /* Never restart if this is configured as special exception */
1437 if (exit_status_set_test(&s->restart_prevent_status, s->main_exec_status.code, s->main_exec_status.status))
1438 return false;
1439
1440 /* Restart if the exit code/status are configured as restart triggers */
1441 if (exit_status_set_test(&s->restart_force_status, s->main_exec_status.code, s->main_exec_status.status))
1442 return true;
1443
1444 switch (s->restart) {
1445
1446 case SERVICE_RESTART_NO:
1447 return false;
1448
1449 case SERVICE_RESTART_ALWAYS:
1450 return true;
1451
1452 case SERVICE_RESTART_ON_SUCCESS:
1453 return s->result == SERVICE_SUCCESS;
1454
1455 case SERVICE_RESTART_ON_FAILURE:
1456 return s->result != SERVICE_SUCCESS;
1457
1458 case SERVICE_RESTART_ON_ABNORMAL:
1459 return !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE);
1460
1461 case SERVICE_RESTART_ON_WATCHDOG:
1462 return s->result == SERVICE_FAILURE_WATCHDOG;
1463
1464 case SERVICE_RESTART_ON_ABORT:
1465 return IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP);
1466
1467 default:
1468 assert_not_reached("unknown restart setting");
1469 }
1470}
1471
1472static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1473 int r;
1474 assert(s);
1475
1476 if (s->result == SERVICE_SUCCESS)
1477 s->result = f;
1478
1479 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1480
1481 if (s->result != SERVICE_SUCCESS) {
1482 log_unit_warning(UNIT(s), "Failed with result '%s'.", service_result_to_string(s->result));
1483 emergency_action(UNIT(s)->manager, s->emergency_action, UNIT(s)->reboot_arg, "service failed");
1484 }
1485
1486 if (allow_restart && service_shall_restart(s)) {
1487
1488 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1489 if (r < 0)
1490 goto fail;
1491
1492 service_set_state(s, SERVICE_AUTO_RESTART);
1493 }
1494
1495 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1496 s->forbid_restart = false;
1497
1498 /* We want fresh tmpdirs in case service is started again immediately */
1499 exec_runtime_destroy(s->exec_runtime);
1500 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1501
1502 /* Also, remove the runtime directory */
1503 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1504
1505 /* Get rid of the IPC bits of the user */
1506 unit_unref_uid_gid(UNIT(s), true);
1507
1508 /* Release the user, and destroy it if we are the only remaining owner */
1509 dynamic_creds_destroy(&s->dynamic_creds);
1510
1511 /* Try to delete the pid file. At this point it will be
1512 * out-of-date, and some software might be confused by it, so
1513 * let's remove it. */
1514 if (s->pid_file)
1515 (void) unlink(s->pid_file);
1516
1517 return;
1518
1519fail:
1520 log_unit_warning_errno(UNIT(s), r, "Failed to run install restart timer: %m");
1521 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1522}
1523
1524static void service_enter_stop_post(Service *s, ServiceResult f) {
1525 int r;
1526 assert(s);
1527
1528 if (s->result == SERVICE_SUCCESS)
1529 s->result = f;
1530
1531 service_unwatch_control_pid(s);
1532 unit_watch_all_pids(UNIT(s));
1533
1534 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1535 if (s->control_command) {
1536 s->control_command_id = SERVICE_EXEC_STOP_POST;
1537
1538 r = service_spawn(s,
1539 s->control_command,
1540 s->timeout_stop_usec,
1541 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1542 &s->control_pid);
1543 if (r < 0)
1544 goto fail;
1545
1546 service_set_state(s, SERVICE_STOP_POST);
1547 } else
1548 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1549
1550 return;
1551
1552fail:
1553 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop-post' task: %m");
1554 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1555}
1556
1557static int state_to_kill_operation(ServiceState state) {
1558 switch (state) {
1559
1560 case SERVICE_STOP_SIGABRT:
1561 return KILL_ABORT;
1562
1563 case SERVICE_STOP_SIGTERM:
1564 case SERVICE_FINAL_SIGTERM:
1565 return KILL_TERMINATE;
1566
1567 case SERVICE_STOP_SIGKILL:
1568 case SERVICE_FINAL_SIGKILL:
1569 return KILL_KILL;
1570
1571 default:
1572 return _KILL_OPERATION_INVALID;
1573 }
1574}
1575
1576static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1577 int r;
1578
1579 assert(s);
1580
1581 if (s->result == SERVICE_SUCCESS)
1582 s->result = f;
1583
1584 unit_watch_all_pids(UNIT(s));
1585
1586 r = unit_kill_context(
1587 UNIT(s),
1588 &s->kill_context,
1589 state_to_kill_operation(state),
1590 s->main_pid,
1591 s->control_pid,
1592 s->main_pid_alien);
1593
1594 if (r < 0)
1595 goto fail;
1596
1597 if (r > 0) {
1598 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1599 if (r < 0)
1600 goto fail;
1601
1602 service_set_state(s, state);
1603 } else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM) && s->kill_context.send_sigkill)
1604 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1605 else if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1606 service_enter_stop_post(s, SERVICE_SUCCESS);
1607 else if (state == SERVICE_FINAL_SIGTERM && s->kill_context.send_sigkill)
1608 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1609 else
1610 service_enter_dead(s, SERVICE_SUCCESS, true);
1611
1612 return;
1613
1614fail:
1615 log_unit_warning_errno(UNIT(s), r, "Failed to kill processes: %m");
1616
1617 if (IN_SET(state, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL))
1618 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1619 else
1620 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1621}
1622
1623static void service_enter_stop_by_notify(Service *s) {
1624 assert(s);
1625
1626 unit_watch_all_pids(UNIT(s));
1627
1628 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_stop_usec));
1629
1630 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1631 service_set_state(s, SERVICE_STOP_SIGTERM);
1632}
1633
1634static void service_enter_stop(Service *s, ServiceResult f) {
1635 int r;
1636
1637 assert(s);
1638
1639 if (s->result == SERVICE_SUCCESS)
1640 s->result = f;
1641
1642 service_unwatch_control_pid(s);
1643 unit_watch_all_pids(UNIT(s));
1644
1645 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1646 if (s->control_command) {
1647 s->control_command_id = SERVICE_EXEC_STOP;
1648
1649 r = service_spawn(s,
1650 s->control_command,
1651 s->timeout_stop_usec,
1652 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_SETENV_RESULT,
1653 &s->control_pid);
1654 if (r < 0)
1655 goto fail;
1656
1657 service_set_state(s, SERVICE_STOP);
1658 } else
1659 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1660
1661 return;
1662
1663fail:
1664 log_unit_warning_errno(UNIT(s), r, "Failed to run 'stop' task: %m");
1665 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1666}
1667
1668static bool service_good(Service *s) {
1669 int main_pid_ok;
1670 assert(s);
1671
1672 if (s->type == SERVICE_DBUS && !s->bus_name_good)
1673 return false;
1674
1675 main_pid_ok = main_pid_good(s);
1676 if (main_pid_ok > 0) /* It's alive */
1677 return true;
1678 if (main_pid_ok == 0) /* It's dead */
1679 return false;
1680
1681 /* OK, we don't know anything about the main PID, maybe
1682 * because there is none. Let's check the control group
1683 * instead. */
1684
1685 return cgroup_good(s) != 0;
1686}
1687
1688static void service_enter_running(Service *s, ServiceResult f) {
1689 assert(s);
1690
1691 if (s->result == SERVICE_SUCCESS)
1692 s->result = f;
1693
1694 service_unwatch_control_pid(s);
1695
1696 if (service_good(s)) {
1697
1698 /* If there are any queued up sd_notify()
1699 * notifications, process them now */
1700 if (s->notify_state == NOTIFY_RELOADING)
1701 service_enter_reload_by_notify(s);
1702 else if (s->notify_state == NOTIFY_STOPPING)
1703 service_enter_stop_by_notify(s);
1704 else {
1705 service_set_state(s, SERVICE_RUNNING);
1706 service_arm_timer(s, usec_add(UNIT(s)->active_enter_timestamp.monotonic, s->runtime_max_usec));
1707 }
1708
1709 } else if (f != SERVICE_SUCCESS)
1710 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
1711 else if (s->remain_after_exit)
1712 service_set_state(s, SERVICE_EXITED);
1713 else
1714 service_enter_stop(s, SERVICE_SUCCESS);
1715}
1716
1717static void service_enter_start_post(Service *s) {
1718 int r;
1719 assert(s);
1720
1721 service_unwatch_control_pid(s);
1722 service_reset_watchdog(s);
1723
1724 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1725 if (s->control_command) {
1726 s->control_command_id = SERVICE_EXEC_START_POST;
1727
1728 r = service_spawn(s,
1729 s->control_command,
1730 s->timeout_start_usec,
1731 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1732 &s->control_pid);
1733 if (r < 0)
1734 goto fail;
1735
1736 service_set_state(s, SERVICE_START_POST);
1737 } else
1738 service_enter_running(s, SERVICE_SUCCESS);
1739
1740 return;
1741
1742fail:
1743 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-post' task: %m");
1744 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1745}
1746
1747static void service_kill_control_processes(Service *s) {
1748 char *p;
1749
1750 if (!UNIT(s)->cgroup_path)
1751 return;
1752
1753 p = strjoina(UNIT(s)->cgroup_path, "/control");
1754 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, CGROUP_SIGCONT|CGROUP_IGNORE_SELF|CGROUP_REMOVE, NULL, NULL, NULL);
1755}
1756
1757static void service_enter_start(Service *s) {
1758 ExecCommand *c;
1759 usec_t timeout;
1760 pid_t pid;
1761 int r;
1762
1763 assert(s);
1764
1765 service_unwatch_control_pid(s);
1766 service_unwatch_main_pid(s);
1767
1768 /* We want to ensure that nobody leaks processes from
1769 * START_PRE here, so let's go on a killing spree, People
1770 * should not spawn long running processes from START_PRE. */
1771 service_kill_control_processes(s);
1772
1773 if (s->type == SERVICE_FORKING) {
1774 s->control_command_id = SERVICE_EXEC_START;
1775 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1776
1777 s->main_command = NULL;
1778 } else {
1779 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1780 s->control_command = NULL;
1781
1782 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1783 }
1784
1785 if (!c) {
1786 if (s->type != SERVICE_ONESHOT) {
1787 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1788 * happen if the configuration changes at runtime. In this case, let's enter a failure
1789 * state. */
1790 log_unit_error(UNIT(s), "There's no 'start' task anymore we could start: %m");
1791 r = -ENXIO;
1792 goto fail;
1793 }
1794
1795 service_enter_start_post(s);
1796 return;
1797 }
1798
1799 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE))
1800 /* For simple + idle this is the main process. We don't apply any timeout here, but
1801 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1802 timeout = USEC_INFINITY;
1803 else
1804 timeout = s->timeout_start_usec;
1805
1806 r = service_spawn(s,
1807 c,
1808 timeout,
1809 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
1810 &pid);
1811 if (r < 0)
1812 goto fail;
1813
1814 if (IN_SET(s->type, SERVICE_SIMPLE, SERVICE_IDLE)) {
1815 /* For simple services we immediately start
1816 * the START_POST binaries. */
1817
1818 service_set_main_pid(s, pid);
1819 service_enter_start_post(s);
1820
1821 } else if (s->type == SERVICE_FORKING) {
1822
1823 /* For forking services we wait until the start
1824 * process exited. */
1825
1826 s->control_pid = pid;
1827 service_set_state(s, SERVICE_START);
1828
1829 } else if (IN_SET(s->type, SERVICE_ONESHOT, SERVICE_DBUS, SERVICE_NOTIFY)) {
1830
1831 /* For oneshot services we wait until the start
1832 * process exited, too, but it is our main process. */
1833
1834 /* For D-Bus services we know the main pid right away,
1835 * but wait for the bus name to appear on the
1836 * bus. Notify services are similar. */
1837
1838 service_set_main_pid(s, pid);
1839 service_set_state(s, SERVICE_START);
1840 } else
1841 assert_not_reached("Unknown service type");
1842
1843 return;
1844
1845fail:
1846 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start' task: %m");
1847 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1848}
1849
1850static void service_enter_start_pre(Service *s) {
1851 int r;
1852
1853 assert(s);
1854
1855 service_unwatch_control_pid(s);
1856
1857 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1858 if (s->control_command) {
1859 /* Before we start anything, let's clear up what might
1860 * be left from previous runs. */
1861 service_kill_control_processes(s);
1862
1863 s->control_command_id = SERVICE_EXEC_START_PRE;
1864
1865 r = service_spawn(s,
1866 s->control_command,
1867 s->timeout_start_usec,
1868 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|EXEC_APPLY_TTY_STDIN,
1869 &s->control_pid);
1870 if (r < 0)
1871 goto fail;
1872
1873 service_set_state(s, SERVICE_START_PRE);
1874 } else
1875 service_enter_start(s);
1876
1877 return;
1878
1879fail:
1880 log_unit_warning_errno(UNIT(s), r, "Failed to run 'start-pre' task: %m");
1881 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1882}
1883
1884static void service_enter_restart(Service *s) {
1885 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
1886 int r;
1887
1888 assert(s);
1889
1890 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1891 /* Don't restart things if we are going down anyway */
1892 log_unit_info(UNIT(s), "Stop job pending for unit, delaying automatic restart.");
1893
1894 r = service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->restart_usec));
1895 if (r < 0)
1896 goto fail;
1897
1898 return;
1899 }
1900
1901 /* Any units that are bound to this service must also be
1902 * restarted. We use JOB_RESTART (instead of the more obvious
1903 * JOB_START) here so that those dependency jobs will be added
1904 * as well. */
1905 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, &error, NULL);
1906 if (r < 0)
1907 goto fail;
1908
1909 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1910 * it will be canceled as part of the service_stop() call that
1911 * is executed as part of JOB_RESTART. */
1912
1913 log_unit_debug(UNIT(s), "Scheduled restart job.");
1914 return;
1915
1916fail:
1917 log_unit_warning(UNIT(s), "Failed to schedule restart job: %s", bus_error_message(&error, -r));
1918 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1919}
1920
1921static void service_enter_reload_by_notify(Service *s) {
1922 assert(s);
1923
1924 service_arm_timer(s, usec_add(now(CLOCK_MONOTONIC), s->timeout_start_usec));
1925 service_set_state(s, SERVICE_RELOAD);
1926}
1927
1928static void service_enter_reload(Service *s) {
1929 int r;
1930
1931 assert(s);
1932
1933 service_unwatch_control_pid(s);
1934 s->reload_result = SERVICE_SUCCESS;
1935
1936 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1937 if (s->control_command) {
1938 s->control_command_id = SERVICE_EXEC_RELOAD;
1939
1940 r = service_spawn(s,
1941 s->control_command,
1942 s->timeout_start_usec,
1943 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL,
1944 &s->control_pid);
1945 if (r < 0)
1946 goto fail;
1947
1948 service_set_state(s, SERVICE_RELOAD);
1949 } else
1950 service_enter_running(s, SERVICE_SUCCESS);
1951
1952 return;
1953
1954fail:
1955 log_unit_warning_errno(UNIT(s), r, "Failed to run 'reload' task: %m");
1956 s->reload_result = SERVICE_FAILURE_RESOURCES;
1957 service_enter_running(s, SERVICE_SUCCESS);
1958}
1959
1960static void service_run_next_control(Service *s) {
1961 usec_t timeout;
1962 int r;
1963
1964 assert(s);
1965 assert(s->control_command);
1966 assert(s->control_command->command_next);
1967
1968 assert(s->control_command_id != SERVICE_EXEC_START);
1969
1970 s->control_command = s->control_command->command_next;
1971 service_unwatch_control_pid(s);
1972
1973 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1974 timeout = s->timeout_start_usec;
1975 else
1976 timeout = s->timeout_stop_usec;
1977
1978 r = service_spawn(s,
1979 s->control_command,
1980 timeout,
1981 EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_IS_CONTROL|
1982 (IN_SET(s->control_command_id, SERVICE_EXEC_START_PRE, SERVICE_EXEC_STOP_POST) ? EXEC_APPLY_TTY_STDIN : 0)|
1983 (IN_SET(s->control_command_id, SERVICE_EXEC_STOP, SERVICE_EXEC_STOP_POST) ? EXEC_SETENV_RESULT : 0),
1984 &s->control_pid);
1985 if (r < 0)
1986 goto fail;
1987
1988 return;
1989
1990fail:
1991 log_unit_warning_errno(UNIT(s), r, "Failed to run next control task: %m");
1992
1993 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_STOP))
1994 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1995 else if (s->state == SERVICE_STOP_POST)
1996 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1997 else if (s->state == SERVICE_RELOAD) {
1998 s->reload_result = SERVICE_FAILURE_RESOURCES;
1999 service_enter_running(s, SERVICE_SUCCESS);
2000 } else
2001 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2002}
2003
2004static void service_run_next_main(Service *s) {
2005 pid_t pid;
2006 int r;
2007
2008 assert(s);
2009 assert(s->main_command);
2010 assert(s->main_command->command_next);
2011 assert(s->type == SERVICE_ONESHOT);
2012
2013 s->main_command = s->main_command->command_next;
2014 service_unwatch_main_pid(s);
2015
2016 r = service_spawn(s,
2017 s->main_command,
2018 s->timeout_start_usec,
2019 EXEC_PASS_FDS|EXEC_APPLY_PERMISSIONS|EXEC_APPLY_CHROOT|EXEC_APPLY_TTY_STDIN|EXEC_SET_WATCHDOG,
2020 &pid);
2021 if (r < 0)
2022 goto fail;
2023
2024 service_set_main_pid(s, pid);
2025
2026 return;
2027
2028fail:
2029 log_unit_warning_errno(UNIT(s), r, "Failed to run next main task: %m");
2030 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2031}
2032
2033static int service_start(Unit *u) {
2034 Service *s = SERVICE(u);
2035 int r;
2036
2037 assert(s);
2038
2039 /* We cannot fulfill this request right now, try again later
2040 * please! */
2041 if (IN_SET(s->state,
2042 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2043 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2044 return -EAGAIN;
2045
2046 /* Already on it! */
2047 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST))
2048 return 0;
2049
2050 /* A service that will be restarted must be stopped first to
2051 * trigger BindsTo and/or OnFailure dependencies. If a user
2052 * does not want to wait for the holdoff time to elapse, the
2053 * service should be manually restarted, not started. We
2054 * simply return EAGAIN here, so that any start jobs stay
2055 * queued, and assume that the auto restart timer will
2056 * eventually trigger the restart. */
2057 if (s->state == SERVICE_AUTO_RESTART)
2058 return -EAGAIN;
2059
2060 assert(IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED));
2061
2062 /* Make sure we don't enter a busy loop of some kind. */
2063 r = unit_start_limit_test(u);
2064 if (r < 0) {
2065 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT_HIT, false);
2066 return r;
2067 }
2068
2069 r = unit_acquire_invocation_id(u);
2070 if (r < 0)
2071 return r;
2072
2073 s->result = SERVICE_SUCCESS;
2074 s->reload_result = SERVICE_SUCCESS;
2075 s->main_pid_known = false;
2076 s->main_pid_alien = false;
2077 s->forbid_restart = false;
2078 s->reset_cpu_usage = true;
2079
2080 s->status_text = mfree(s->status_text);
2081 s->status_errno = 0;
2082
2083 s->notify_state = NOTIFY_UNKNOWN;
2084
2085 s->watchdog_override_enable = false;
2086 s->watchdog_override_usec = 0;
2087
2088 service_enter_start_pre(s);
2089 return 1;
2090}
2091
2092static int service_stop(Unit *u) {
2093 Service *s = SERVICE(u);
2094
2095 assert(s);
2096
2097 /* Don't create restart jobs from manual stops. */
2098 s->forbid_restart = true;
2099
2100 /* Already on it */
2101 if (IN_SET(s->state,
2102 SERVICE_STOP, SERVICE_STOP_SIGABRT, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
2103 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))
2104 return 0;
2105
2106 /* A restart will be scheduled or is in progress. */
2107 if (s->state == SERVICE_AUTO_RESTART) {
2108 service_set_state(s, SERVICE_DEAD);
2109 return 0;
2110 }
2111
2112 /* If there's already something running we go directly into
2113 * kill mode. */
2114 if (IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD)) {
2115 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2116 return 0;
2117 }
2118
2119 assert(IN_SET(s->state, SERVICE_RUNNING, SERVICE_EXITED));
2120
2121 service_enter_stop(s, SERVICE_SUCCESS);
2122 return 1;
2123}
2124
2125static int service_reload(Unit *u) {
2126 Service *s = SERVICE(u);
2127
2128 assert(s);
2129
2130 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2131
2132 service_enter_reload(s);
2133 return 1;
2134}
2135
2136_pure_ static bool service_can_reload(Unit *u) {
2137 Service *s = SERVICE(u);
2138
2139 assert(s);
2140
2141 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2142}
2143
2144static unsigned service_exec_command_index(Unit *u, ServiceExecCommand id, ExecCommand *current) {
2145 Service *s = SERVICE(u);
2146 unsigned idx = 0;
2147 ExecCommand *first, *c;
2148
2149 assert(s);
2150
2151 first = s->exec_command[id];
2152
2153 /* Figure out where we are in the list by walking back to the beginning */
2154 for (c = current; c != first; c = c->command_prev)
2155 idx++;
2156
2157 return idx;
2158}
2159
2160static int service_serialize_exec_command(Unit *u, FILE *f, ExecCommand *command) {
2161 Service *s = SERVICE(u);
2162 ServiceExecCommand id;
2163 unsigned idx;
2164 const char *type;
2165 char **arg;
2166 _cleanup_strv_free_ char **escaped_args = NULL;
2167 _cleanup_free_ char *args = NULL, *p = NULL;
2168 size_t allocated = 0, length = 0;
2169
2170 assert(s);
2171 assert(f);
2172
2173 if (!command)
2174 return 0;
2175
2176 if (command == s->control_command) {
2177 type = "control";
2178 id = s->control_command_id;
2179 } else {
2180 type = "main";
2181 id = SERVICE_EXEC_START;
2182 }
2183
2184 idx = service_exec_command_index(u, id, command);
2185
2186 STRV_FOREACH(arg, command->argv) {
2187 size_t n;
2188 _cleanup_free_ char *e = NULL;
2189
2190 e = xescape(*arg, WHITESPACE);
2191 if (!e)
2192 return -ENOMEM;
2193
2194 n = strlen(e);
2195 if (!GREEDY_REALLOC(args, allocated, length + 1 + n + 1))
2196 return -ENOMEM;
2197
2198 if (length > 0)
2199 args[length++] = ' ';
2200
2201 memcpy(args + length, e, n);
2202 length += n;
2203 }
2204
2205 if (!GREEDY_REALLOC(args, allocated, length + 1))
2206 return -ENOMEM;
2207 args[length++] = 0;
2208
2209 p = xescape(command->path, WHITESPACE);
2210 if (!p)
2211 return -ENOMEM;
2212
2213 fprintf(f, "%s-command=%s %u %s %s\n", type, service_exec_command_to_string(id), idx, p, args);
2214
2215 return 0;
2216}
2217
2218static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2219 Service *s = SERVICE(u);
2220 ServiceFDStore *fs;
2221 int r;
2222
2223 assert(u);
2224 assert(f);
2225 assert(fds);
2226
2227 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2228 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2229 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2230
2231 if (s->control_pid > 0)
2232 unit_serialize_item_format(u, f, "control-pid", PID_FMT, s->control_pid);
2233
2234 if (s->main_pid_known && s->main_pid > 0)
2235 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2236
2237 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2238 unit_serialize_item(u, f, "bus-name-good", yes_no(s->bus_name_good));
2239 unit_serialize_item(u, f, "bus-name-owner", s->bus_name_owner);
2240
2241 r = unit_serialize_item_escaped(u, f, "status-text", s->status_text);
2242 if (r < 0)
2243 return r;
2244
2245 service_serialize_exec_command(u, f, s->control_command);
2246 service_serialize_exec_command(u, f, s->main_command);
2247
2248 r = unit_serialize_item_fd(u, f, fds, "stdin-fd", s->stdin_fd);
2249 if (r < 0)
2250 return r;
2251 r = unit_serialize_item_fd(u, f, fds, "stdout-fd", s->stdout_fd);
2252 if (r < 0)
2253 return r;
2254 r = unit_serialize_item_fd(u, f, fds, "stderr-fd", s->stderr_fd);
2255 if (r < 0)
2256 return r;
2257
2258 if (UNIT_ISSET(s->accept_socket)) {
2259 r = unit_serialize_item(u, f, "accept-socket", UNIT_DEREF(s->accept_socket)->id);
2260 if (r < 0)
2261 return r;
2262 }
2263
2264 r = unit_serialize_item_fd(u, f, fds, "socket-fd", s->socket_fd);
2265 if (r < 0)
2266 return r;
2267
2268 LIST_FOREACH(fd_store, fs, s->fd_store) {
2269 _cleanup_free_ char *c = NULL;
2270 int copy;
2271
2272 copy = fdset_put_dup(fds, fs->fd);
2273 if (copy < 0)
2274 return copy;
2275
2276 c = cescape(fs->fdname);
2277
2278 unit_serialize_item_format(u, f, "fd-store-fd", "%i %s", copy, strempty(c));
2279 }
2280
2281 if (s->main_exec_status.pid > 0) {
2282 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT, s->main_exec_status.pid);
2283 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2284 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2285
2286 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2287 unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2288 unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2289 }
2290 }
2291
2292 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2293
2294 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2295
2296 if (s->watchdog_override_enable)
2297 unit_serialize_item_format(u, f, "watchdog-override-usec", USEC_FMT, s->watchdog_override_usec);
2298
2299 return 0;
2300}
2301
2302static int service_deserialize_exec_command(Unit *u, const char *key, const char *value) {
2303 Service *s = SERVICE(u);
2304 int r;
2305 unsigned idx = 0, i;
2306 bool control, found = false;
2307 ServiceExecCommand id = _SERVICE_EXEC_COMMAND_INVALID;
2308 ExecCommand *command = NULL;
2309 _cleanup_free_ char *args = NULL, *path = NULL;
2310 _cleanup_strv_free_ char **argv = NULL;
2311
2312 enum ExecCommandState {
2313 STATE_EXEC_COMMAND_TYPE,
2314 STATE_EXEC_COMMAND_INDEX,
2315 STATE_EXEC_COMMAND_PATH,
2316 STATE_EXEC_COMMAND_ARGS,
2317 _STATE_EXEC_COMMAND_MAX,
2318 _STATE_EXEC_COMMAND_INVALID = -1,
2319 } state;
2320
2321 assert(s);
2322 assert(key);
2323 assert(value);
2324
2325 control = streq(key, "control-command");
2326
2327 state = STATE_EXEC_COMMAND_TYPE;
2328
2329 for (;;) {
2330 _cleanup_free_ char *arg = NULL;
2331
2332 r = extract_first_word(&value, &arg, NULL, EXTRACT_CUNESCAPE);
2333 if (r == 0)
2334 break;
2335 else if (r < 0)
2336 return r;
2337
2338 switch (state) {
2339 case STATE_EXEC_COMMAND_TYPE:
2340 id = service_exec_command_from_string(arg);
2341 if (id < 0)
2342 return -EINVAL;
2343
2344 state = STATE_EXEC_COMMAND_INDEX;
2345 break;
2346 case STATE_EXEC_COMMAND_INDEX:
2347 r = safe_atou(arg, &idx);
2348 if (r < 0)
2349 return -EINVAL;
2350
2351 state = STATE_EXEC_COMMAND_PATH;
2352 break;
2353 case STATE_EXEC_COMMAND_PATH:
2354 path = arg;
2355 arg = NULL;
2356 state = STATE_EXEC_COMMAND_ARGS;
2357
2358 if (!path_is_absolute(path))
2359 return -EINVAL;
2360 break;
2361 case STATE_EXEC_COMMAND_ARGS:
2362 r = strv_extend(&argv, arg);
2363 if (r < 0)
2364 return -ENOMEM;
2365 break;
2366 default:
2367 assert_not_reached("Unknown error at deserialization of exec command");
2368 break;
2369 }
2370 }
2371
2372 if (state != STATE_EXEC_COMMAND_ARGS)
2373 return -EINVAL;
2374
2375 /* Let's check whether exec command on given offset matches data that we just deserialized */
2376 for (command = s->exec_command[id], i = 0; command; command = command->command_next, i++) {
2377 if (i != idx)
2378 continue;
2379
2380 found = strv_equal(argv, command->argv) && streq(command->path, path);
2381 break;
2382 }
2383
2384 if (!found) {
2385 /* Command at the index we serialized is different, let's look for command that exactly
2386 * matches but is on different index. If there is no such command we will not resume execution. */
2387 for (command = s->exec_command[id]; command; command = command->command_next)
2388 if (strv_equal(command->argv, argv) && streq(command->path, path))
2389 break;
2390 }
2391
2392 if (command && control)
2393 s->control_command = command;
2394 else if (command)
2395 s->main_command = command;
2396 else
2397 log_unit_warning(u, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2398
2399 return 0;
2400}
2401
2402static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2403 Service *s = SERVICE(u);
2404 int r;
2405
2406 assert(u);
2407 assert(key);
2408 assert(value);
2409 assert(fds);
2410
2411 if (streq(key, "state")) {
2412 ServiceState state;
2413
2414 state = service_state_from_string(value);
2415 if (state < 0)
2416 log_unit_debug(u, "Failed to parse state value: %s", value);
2417 else
2418 s->deserialized_state = state;
2419 } else if (streq(key, "result")) {
2420 ServiceResult f;
2421
2422 f = service_result_from_string(value);
2423 if (f < 0)
2424 log_unit_debug(u, "Failed to parse result value: %s", value);
2425 else if (f != SERVICE_SUCCESS)
2426 s->result = f;
2427
2428 } else if (streq(key, "reload-result")) {
2429 ServiceResult f;
2430
2431 f = service_result_from_string(value);
2432 if (f < 0)
2433 log_unit_debug(u, "Failed to parse reload result value: %s", value);
2434 else if (f != SERVICE_SUCCESS)
2435 s->reload_result = f;
2436
2437 } else if (streq(key, "control-pid")) {
2438 pid_t pid;
2439
2440 if (parse_pid(value, &pid) < 0)
2441 log_unit_debug(u, "Failed to parse control-pid value: %s", value);
2442 else
2443 s->control_pid = pid;
2444 } else if (streq(key, "main-pid")) {
2445 pid_t pid;
2446
2447 if (parse_pid(value, &pid) < 0)
2448 log_unit_debug(u, "Failed to parse main-pid value: %s", value);
2449 else {
2450 service_set_main_pid(s, pid);
2451 unit_watch_pid(UNIT(s), pid);
2452 }
2453 } else if (streq(key, "main-pid-known")) {
2454 int b;
2455
2456 b = parse_boolean(value);
2457 if (b < 0)
2458 log_unit_debug(u, "Failed to parse main-pid-known value: %s", value);
2459 else
2460 s->main_pid_known = b;
2461 } else if (streq(key, "bus-name-good")) {
2462 int b;
2463
2464 b = parse_boolean(value);
2465 if (b < 0)
2466 log_unit_debug(u, "Failed to parse bus-name-good value: %s", value);
2467 else
2468 s->bus_name_good = b;
2469 } else if (streq(key, "bus-name-owner")) {
2470 r = free_and_strdup(&s->bus_name_owner, value);
2471 if (r < 0)
2472 log_unit_error_errno(u, r, "Unable to deserialize current bus owner %s: %m", value);
2473 } else if (streq(key, "status-text")) {
2474 char *t;
2475
2476 r = cunescape(value, 0, &t);
2477 if (r < 0)
2478 log_unit_debug_errno(u, r, "Failed to unescape status text: %s", value);
2479 else {
2480 free(s->status_text);
2481 s->status_text = t;
2482 }
2483
2484 } else if (streq(key, "accept-socket")) {
2485 Unit *socket;
2486
2487 r = manager_load_unit(u->manager, value, NULL, NULL, &socket);
2488 if (r < 0)
2489 log_unit_debug_errno(u, r, "Failed to load accept-socket unit: %s", value);
2490 else {
2491 unit_ref_set(&s->accept_socket, socket);
2492 SOCKET(socket)->n_connections++;
2493 }
2494
2495 } else if (streq(key, "socket-fd")) {
2496 int fd;
2497
2498 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2499 log_unit_debug(u, "Failed to parse socket-fd value: %s", value);
2500 else {
2501 asynchronous_close(s->socket_fd);
2502 s->socket_fd = fdset_remove(fds, fd);
2503 }
2504 } else if (streq(key, "fd-store-fd")) {
2505 const char *fdv;
2506 size_t pf;
2507 int fd;
2508
2509 pf = strcspn(value, WHITESPACE);
2510 fdv = strndupa(value, pf);
2511
2512 if (safe_atoi(fdv, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2513 log_unit_debug(u, "Failed to parse fd-store-fd value: %s", value);
2514 else {
2515 _cleanup_free_ char *t = NULL;
2516 const char *fdn;
2517
2518 fdn = value + pf;
2519 fdn += strspn(fdn, WHITESPACE);
2520 (void) cunescape(fdn, 0, &t);
2521
2522 r = service_add_fd_store(s, fd, t);
2523 if (r < 0)
2524 log_unit_error_errno(u, r, "Failed to add fd to store: %m");
2525 else
2526 fdset_remove(fds, fd);
2527 }
2528
2529 } else if (streq(key, "main-exec-status-pid")) {
2530 pid_t pid;
2531
2532 if (parse_pid(value, &pid) < 0)
2533 log_unit_debug(u, "Failed to parse main-exec-status-pid value: %s", value);
2534 else
2535 s->main_exec_status.pid = pid;
2536 } else if (streq(key, "main-exec-status-code")) {
2537 int i;
2538
2539 if (safe_atoi(value, &i) < 0)
2540 log_unit_debug(u, "Failed to parse main-exec-status-code value: %s", value);
2541 else
2542 s->main_exec_status.code = i;
2543 } else if (streq(key, "main-exec-status-status")) {
2544 int i;
2545
2546 if (safe_atoi(value, &i) < 0)
2547 log_unit_debug(u, "Failed to parse main-exec-status-status value: %s", value);
2548 else
2549 s->main_exec_status.status = i;
2550 } else if (streq(key, "main-exec-status-start"))
2551 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2552 else if (streq(key, "main-exec-status-exit"))
2553 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2554 else if (streq(key, "watchdog-timestamp"))
2555 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2556 else if (streq(key, "forbid-restart")) {
2557 int b;
2558
2559 b = parse_boolean(value);
2560 if (b < 0)
2561 log_unit_debug(u, "Failed to parse forbid-restart value: %s", value);
2562 else
2563 s->forbid_restart = b;
2564 } else if (streq(key, "stdin-fd")) {
2565 int fd;
2566
2567 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2568 log_unit_debug(u, "Failed to parse stdin-fd value: %s", value);
2569 else {
2570 asynchronous_close(s->stdin_fd);
2571 s->stdin_fd = fdset_remove(fds, fd);
2572 s->exec_context.stdio_as_fds = true;
2573 }
2574 } else if (streq(key, "stdout-fd")) {
2575 int fd;
2576
2577 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2578 log_unit_debug(u, "Failed to parse stdout-fd value: %s", value);
2579 else {
2580 asynchronous_close(s->stdout_fd);
2581 s->stdout_fd = fdset_remove(fds, fd);
2582 s->exec_context.stdio_as_fds = true;
2583 }
2584 } else if (streq(key, "stderr-fd")) {
2585 int fd;
2586
2587 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2588 log_unit_debug(u, "Failed to parse stderr-fd value: %s", value);
2589 else {
2590 asynchronous_close(s->stderr_fd);
2591 s->stderr_fd = fdset_remove(fds, fd);
2592 s->exec_context.stdio_as_fds = true;
2593 }
2594 } else if (streq(key, "watchdog-override-usec")) {
2595 usec_t watchdog_override_usec;
2596 if (timestamp_deserialize(value, &watchdog_override_usec) < 0)
2597 log_unit_debug(u, "Failed to parse watchdog_override_usec value: %s", value);
2598 else {
2599 s->watchdog_override_enable = true;
2600 s->watchdog_override_usec = watchdog_override_usec;
2601 }
2602 } else if (STR_IN_SET(key, "main-command", "control-command")) {
2603 r = service_deserialize_exec_command(u, key, value);
2604 if (r < 0)
2605 log_unit_debug_errno(u, r, "Failed to parse serialized command \"%s\": %m", value);
2606 } else
2607 log_unit_debug(u, "Unknown serialization key: %s", key);
2608
2609 return 0;
2610}
2611
2612_pure_ static UnitActiveState service_active_state(Unit *u) {
2613 const UnitActiveState *table;
2614
2615 assert(u);
2616
2617 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2618
2619 return table[SERVICE(u)->state];
2620}
2621
2622static const char *service_sub_state_to_string(Unit *u) {
2623 assert(u);
2624
2625 return service_state_to_string(SERVICE(u)->state);
2626}
2627
2628static bool service_check_gc(Unit *u) {
2629 Service *s = SERVICE(u);
2630
2631 assert(s);
2632
2633 /* Never clean up services that still have a process around,
2634 * even if the service is formally dead. */
2635 if (cgroup_good(s) > 0 ||
2636 main_pid_good(s) > 0 ||
2637 control_pid_good(s) > 0)
2638 return true;
2639
2640 return false;
2641}
2642
2643static int service_retry_pid_file(Service *s) {
2644 int r;
2645
2646 assert(s->pid_file);
2647 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2648
2649 r = service_load_pid_file(s, false);
2650 if (r < 0)
2651 return r;
2652
2653 service_unwatch_pid_file(s);
2654
2655 service_enter_running(s, SERVICE_SUCCESS);
2656 return 0;
2657}
2658
2659static int service_watch_pid_file(Service *s) {
2660 int r;
2661
2662 log_unit_debug(UNIT(s), "Setting watch for PID file %s", s->pid_file_pathspec->path);
2663
2664 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2665 if (r < 0)
2666 goto fail;
2667
2668 /* the pidfile might have appeared just before we set the watch */
2669 log_unit_debug(UNIT(s), "Trying to read PID file %s in case it changed", s->pid_file_pathspec->path);
2670 service_retry_pid_file(s);
2671
2672 return 0;
2673fail:
2674 log_unit_error_errno(UNIT(s), r, "Failed to set a watch for PID file %s: %m", s->pid_file_pathspec->path);
2675 service_unwatch_pid_file(s);
2676 return r;
2677}
2678
2679static int service_demand_pid_file(Service *s) {
2680 PathSpec *ps;
2681
2682 assert(s->pid_file);
2683 assert(!s->pid_file_pathspec);
2684
2685 ps = new0(PathSpec, 1);
2686 if (!ps)
2687 return -ENOMEM;
2688
2689 ps->unit = UNIT(s);
2690 ps->path = strdup(s->pid_file);
2691 if (!ps->path) {
2692 free(ps);
2693 return -ENOMEM;
2694 }
2695
2696 path_kill_slashes(ps->path);
2697
2698 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2699 * keep their PID file open all the time. */
2700 ps->type = PATH_MODIFIED;
2701 ps->inotify_fd = -1;
2702
2703 s->pid_file_pathspec = ps;
2704
2705 return service_watch_pid_file(s);
2706}
2707
2708static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2709 PathSpec *p = userdata;
2710 Service *s;
2711
2712 assert(p);
2713
2714 s = SERVICE(p->unit);
2715
2716 assert(s);
2717 assert(fd >= 0);
2718 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2719 assert(s->pid_file_pathspec);
2720 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2721
2722 log_unit_debug(UNIT(s), "inotify event");
2723
2724 if (path_spec_fd_event(p, events) < 0)
2725 goto fail;
2726
2727 if (service_retry_pid_file(s) == 0)
2728 return 0;
2729
2730 if (service_watch_pid_file(s) < 0)
2731 goto fail;
2732
2733 return 0;
2734
2735fail:
2736 service_unwatch_pid_file(s);
2737 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2738 return 0;
2739}
2740
2741static void service_notify_cgroup_empty_event(Unit *u) {
2742 Service *s = SERVICE(u);
2743
2744 assert(u);
2745
2746 log_unit_debug(u, "cgroup is empty");
2747
2748 switch (s->state) {
2749
2750 /* Waiting for SIGCHLD is usually more interesting,
2751 * because it includes return codes/signals. Which is
2752 * why we ignore the cgroup events for most cases,
2753 * except when we don't know pid which to expect the
2754 * SIGCHLD for. */
2755
2756 case SERVICE_START:
2757 if (s->type == SERVICE_NOTIFY) {
2758 /* No chance of getting a ready notification anymore */
2759 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2760 break;
2761 }
2762
2763 /* Fall through */
2764
2765 case SERVICE_START_POST:
2766 if (s->pid_file_pathspec) {
2767 /* Give up hoping for the daemon to write its PID file */
2768 log_unit_warning(u, "Daemon never wrote its PID file. Failing.");
2769
2770 service_unwatch_pid_file(s);
2771 if (s->state == SERVICE_START)
2772 service_enter_stop_post(s, SERVICE_FAILURE_PROTOCOL);
2773 else
2774 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
2775 }
2776 break;
2777
2778 case SERVICE_RUNNING:
2779 /* service_enter_running() will figure out what to do */
2780 service_enter_running(s, SERVICE_SUCCESS);
2781 break;
2782
2783 case SERVICE_STOP_SIGABRT:
2784 case SERVICE_STOP_SIGTERM:
2785 case SERVICE_STOP_SIGKILL:
2786
2787 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2788 service_enter_stop_post(s, SERVICE_SUCCESS);
2789
2790 break;
2791
2792 case SERVICE_STOP_POST:
2793 case SERVICE_FINAL_SIGTERM:
2794 case SERVICE_FINAL_SIGKILL:
2795 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2796 service_enter_dead(s, SERVICE_SUCCESS, true);
2797
2798 break;
2799
2800 default:
2801 ;
2802 }
2803}
2804
2805static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2806 Service *s = SERVICE(u);
2807 ServiceResult f;
2808
2809 assert(s);
2810 assert(pid >= 0);
2811
2812 if (is_clean_exit(code, status, s->type == SERVICE_ONESHOT ? EXIT_CLEAN_COMMAND : EXIT_CLEAN_DAEMON, &s->success_status))
2813 f = SERVICE_SUCCESS;
2814 else if (code == CLD_EXITED)
2815 f = SERVICE_FAILURE_EXIT_CODE;
2816 else if (code == CLD_KILLED)
2817 f = SERVICE_FAILURE_SIGNAL;
2818 else if (code == CLD_DUMPED)
2819 f = SERVICE_FAILURE_CORE_DUMP;
2820 else
2821 assert_not_reached("Unknown code");
2822
2823 if (s->main_pid == pid) {
2824 /* Forking services may occasionally move to a new PID.
2825 * As long as they update the PID file before exiting the old
2826 * PID, they're fine. */
2827 if (service_load_pid_file(s, false) == 0)
2828 return;
2829
2830 s->main_pid = 0;
2831 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2832
2833 if (s->main_command) {
2834 /* If this is not a forking service than the
2835 * main process got started and hence we copy
2836 * the exit status so that it is recorded both
2837 * as main and as control process exit
2838 * status */
2839
2840 s->main_command->exec_status = s->main_exec_status;
2841
2842 if (s->main_command->ignore)
2843 f = SERVICE_SUCCESS;
2844 } else if (s->exec_command[SERVICE_EXEC_START]) {
2845
2846 /* If this is a forked process, then we should
2847 * ignore the return value if this was
2848 * configured for the starter process */
2849
2850 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2851 f = SERVICE_SUCCESS;
2852 }
2853
2854 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
2855 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
2856 * that the service already logged the reason at a higher log level on its own. However, if the service
2857 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
2858 * our log level to WARNING then. */
2859
2860 log_struct(f == SERVICE_SUCCESS ? LOG_DEBUG :
2861 (code == CLD_EXITED ? LOG_NOTICE : LOG_WARNING),
2862 LOG_UNIT_MESSAGE(u, "Main process exited, code=%s, status=%i/%s",
2863 sigchld_code_to_string(code), status,
2864 strna(code == CLD_EXITED
2865 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2866 : signal_to_string(status))),
2867 "EXIT_CODE=%s", sigchld_code_to_string(code),
2868 "EXIT_STATUS=%i", status,
2869 LOG_UNIT_ID(u),
2870 NULL);
2871
2872 if (s->result == SERVICE_SUCCESS)
2873 s->result = f;
2874
2875 if (s->main_command &&
2876 s->main_command->command_next &&
2877 f == SERVICE_SUCCESS) {
2878
2879 /* There is another command to *
2880 * execute, so let's do that. */
2881
2882 log_unit_debug(u, "Running next main command for state %s.", service_state_to_string(s->state));
2883 service_run_next_main(s);
2884
2885 } else {
2886
2887 /* The service exited, so the service is officially
2888 * gone. */
2889 s->main_command = NULL;
2890
2891 switch (s->state) {
2892
2893 case SERVICE_START_POST:
2894 case SERVICE_RELOAD:
2895 case SERVICE_STOP:
2896 /* Need to wait until the operation is
2897 * done */
2898 break;
2899
2900 case SERVICE_START:
2901 if (s->type == SERVICE_ONESHOT) {
2902 /* This was our main goal, so let's go on */
2903 if (f == SERVICE_SUCCESS)
2904 service_enter_start_post(s);
2905 else
2906 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2907 break;
2908 } else if (s->type == SERVICE_NOTIFY) {
2909 /* Only enter running through a notification, so that the
2910 * SERVICE_START state signifies that no ready notification
2911 * has been received */
2912 if (f != SERVICE_SUCCESS)
2913 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2914 else if (!s->remain_after_exit)
2915 /* The service has never been active */
2916 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
2917 break;
2918 }
2919
2920 /* Fall through */
2921
2922 case SERVICE_RUNNING:
2923 service_enter_running(s, f);
2924 break;
2925
2926 case SERVICE_STOP_SIGABRT:
2927 case SERVICE_STOP_SIGTERM:
2928 case SERVICE_STOP_SIGKILL:
2929
2930 if (!control_pid_good(s))
2931 service_enter_stop_post(s, f);
2932
2933 /* If there is still a control process, wait for that first */
2934 break;
2935
2936 case SERVICE_STOP_POST:
2937 case SERVICE_FINAL_SIGTERM:
2938 case SERVICE_FINAL_SIGKILL:
2939
2940 if (!control_pid_good(s))
2941 service_enter_dead(s, f, true);
2942 break;
2943
2944 default:
2945 assert_not_reached("Uh, main process died at wrong time.");
2946 }
2947 }
2948
2949 } else if (s->control_pid == pid) {
2950 s->control_pid = 0;
2951
2952 if (s->control_command) {
2953 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2954
2955 if (s->control_command->ignore)
2956 f = SERVICE_SUCCESS;
2957 }
2958
2959 log_unit_full(u, f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0,
2960 "Control process exited, code=%s status=%i",
2961 sigchld_code_to_string(code), status);
2962
2963 if (s->result == SERVICE_SUCCESS)
2964 s->result = f;
2965
2966 /* Immediately get rid of the cgroup, so that the
2967 * kernel doesn't delay the cgroup empty messages for
2968 * the service cgroup any longer than necessary */
2969 service_kill_control_processes(s);
2970
2971 if (s->control_command &&
2972 s->control_command->command_next &&
2973 f == SERVICE_SUCCESS) {
2974
2975 /* There is another command to *
2976 * execute, so let's do that. */
2977
2978 log_unit_debug(u, "Running next control command for state %s.", service_state_to_string(s->state));
2979 service_run_next_control(s);
2980
2981 } else {
2982 /* No further commands for this step, so let's
2983 * figure out what to do next */
2984
2985 s->control_command = NULL;
2986 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2987
2988 log_unit_debug(u, "Got final SIGCHLD for state %s.", service_state_to_string(s->state));
2989
2990 switch (s->state) {
2991
2992 case SERVICE_START_PRE:
2993 if (f == SERVICE_SUCCESS)
2994 service_enter_start(s);
2995 else
2996 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2997 break;
2998
2999 case SERVICE_START:
3000 if (s->type != SERVICE_FORKING)
3001 /* Maybe spurious event due to a reload that changed the type? */
3002 break;
3003
3004 if (f != SERVICE_SUCCESS) {
3005 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3006 break;
3007 }
3008
3009 if (s->pid_file) {
3010 bool has_start_post;
3011 int r;
3012
3013 /* Let's try to load the pid file here if we can.
3014 * The PID file might actually be created by a START_POST
3015 * script. In that case don't worry if the loading fails. */
3016
3017 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3018 r = service_load_pid_file(s, !has_start_post);
3019 if (!has_start_post && r < 0) {
3020 r = service_demand_pid_file(s);
3021 if (r < 0 || !cgroup_good(s))
3022 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_PROTOCOL);
3023 break;
3024 }
3025 } else
3026 service_search_main_pid(s);
3027
3028 service_enter_start_post(s);
3029 break;
3030
3031 case SERVICE_START_POST:
3032 if (f != SERVICE_SUCCESS) {
3033 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3034 break;
3035 }
3036
3037 if (s->pid_file) {
3038 int r;
3039
3040 r = service_load_pid_file(s, true);
3041 if (r < 0) {
3042 r = service_demand_pid_file(s);
3043 if (r < 0 || !cgroup_good(s))
3044 service_enter_stop(s, SERVICE_FAILURE_PROTOCOL);
3045 break;
3046 }
3047 } else
3048 service_search_main_pid(s);
3049
3050 service_enter_running(s, SERVICE_SUCCESS);
3051 break;
3052
3053 case SERVICE_RELOAD:
3054 if (f == SERVICE_SUCCESS)
3055 if (service_load_pid_file(s, true) < 0)
3056 service_search_main_pid(s);
3057
3058 s->reload_result = f;
3059 service_enter_running(s, SERVICE_SUCCESS);
3060 break;
3061
3062 case SERVICE_STOP:
3063 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3064 break;
3065
3066 case SERVICE_STOP_SIGABRT:
3067 case SERVICE_STOP_SIGTERM:
3068 case SERVICE_STOP_SIGKILL:
3069 if (main_pid_good(s) <= 0)
3070 service_enter_stop_post(s, f);
3071
3072 /* If there is still a service
3073 * process around, wait until
3074 * that one quit, too */
3075 break;
3076
3077 case SERVICE_STOP_POST:
3078 case SERVICE_FINAL_SIGTERM:
3079 case SERVICE_FINAL_SIGKILL:
3080 if (main_pid_good(s) <= 0)
3081 service_enter_dead(s, f, true);
3082 break;
3083
3084 default:
3085 assert_not_reached("Uh, control process died at wrong time.");
3086 }
3087 }
3088 }
3089
3090 /* Notify clients about changed exit status */
3091 unit_add_to_dbus_queue(u);
3092
3093 /* We got one SIGCHLD for the service, let's watch all
3094 * processes that are now running of the service, and watch
3095 * that. Among the PIDs we then watch will be children
3096 * reassigned to us, which hopefully allows us to identify
3097 * when all children are gone */
3098 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3099 unit_watch_all_pids(u);
3100
3101 /* If the PID set is empty now, then let's finish this off
3102 (On unified we use proper notifications) */
3103 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER) == 0 && set_isempty(u->pids))
3104 service_notify_cgroup_empty_event(u);
3105}
3106
3107static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3108 Service *s = SERVICE(userdata);
3109
3110 assert(s);
3111 assert(source == s->timer_event_source);
3112
3113 switch (s->state) {
3114
3115 case SERVICE_START_PRE:
3116 case SERVICE_START:
3117 log_unit_warning(UNIT(s), "%s operation timed out. Terminating.", s->state == SERVICE_START ? "Start" : "Start-pre");
3118 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3119 break;
3120
3121 case SERVICE_START_POST:
3122 log_unit_warning(UNIT(s), "Start-post operation timed out. Stopping.");
3123 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3124 break;
3125
3126 case SERVICE_RUNNING:
3127 log_unit_warning(UNIT(s), "Service reached runtime time limit. Stopping.");
3128 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3129 break;
3130
3131 case SERVICE_RELOAD:
3132 log_unit_warning(UNIT(s), "Reload operation timed out. Killing reload process.");
3133 service_kill_control_processes(s);
3134 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3135 service_enter_running(s, SERVICE_SUCCESS);
3136 break;
3137
3138 case SERVICE_STOP:
3139 log_unit_warning(UNIT(s), "Stopping timed out. Terminating.");
3140 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3141 break;
3142
3143 case SERVICE_STOP_SIGABRT:
3144 log_unit_warning(UNIT(s), "State 'stop-sigabrt' timed out. Terminating.");
3145 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3146 break;
3147
3148 case SERVICE_STOP_SIGTERM:
3149 if (s->kill_context.send_sigkill) {
3150 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Killing.");
3151 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3152 } else {
3153 log_unit_warning(UNIT(s), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3154 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3155 }
3156
3157 break;
3158
3159 case SERVICE_STOP_SIGKILL:
3160 /* Uh, we sent a SIGKILL and it is still not gone?
3161 * Must be something we cannot kill, so let's just be
3162 * weirded out and continue */
3163
3164 log_unit_warning(UNIT(s), "Processes still around after SIGKILL. Ignoring.");
3165 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3166 break;
3167
3168 case SERVICE_STOP_POST:
3169 log_unit_warning(UNIT(s), "State 'stop-post' timed out. Terminating.");
3170 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3171 break;
3172
3173 case SERVICE_FINAL_SIGTERM:
3174 if (s->kill_context.send_sigkill) {
3175 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Killing.");
3176 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3177 } else {
3178 log_unit_warning(UNIT(s), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3179 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3180 }
3181
3182 break;
3183
3184 case SERVICE_FINAL_SIGKILL:
3185 log_unit_warning(UNIT(s), "Processes still around after final SIGKILL. Entering failed mode.");
3186 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3187 break;
3188
3189 case SERVICE_AUTO_RESTART:
3190 log_unit_info(UNIT(s),
3191 s->restart_usec > 0 ?
3192 "Service hold-off time over, scheduling restart." :
3193 "Service has no hold-off time, scheduling restart.");
3194 service_enter_restart(s);
3195 break;
3196
3197 default:
3198 assert_not_reached("Timeout at wrong time.");
3199 }
3200
3201 return 0;
3202}
3203
3204static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3205 Service *s = SERVICE(userdata);
3206 char t[FORMAT_TIMESPAN_MAX];
3207 usec_t watchdog_usec;
3208
3209 assert(s);
3210 assert(source == s->watchdog_event_source);
3211
3212 watchdog_usec = service_get_watchdog_usec(s);
3213
3214 log_unit_error(UNIT(s), "Watchdog timeout (limit %s)!",
3215 format_timespan(t, sizeof(t), watchdog_usec, 1));
3216
3217 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
3218
3219 return 0;
3220}
3221
3222static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds) {
3223 Service *s = SERVICE(u);
3224 _cleanup_free_ char *cc = NULL;
3225 bool notify_dbus = false;
3226 const char *e;
3227
3228 assert(u);
3229
3230 cc = strv_join(tags, ", ");
3231
3232 if (s->notify_access == NOTIFY_NONE) {
3233 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception is disabled.", pid);
3234 return;
3235 } else if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3236 if (s->main_pid != 0)
3237 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3238 else
3239 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", pid);
3240 return;
3241 } else if (s->notify_access == NOTIFY_EXEC && pid != s->main_pid && pid != s->control_pid) {
3242 if (s->main_pid != 0 && s->control_pid != 0)
3243 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT" and control PID "PID_FMT,
3244 pid, s->main_pid, s->control_pid);
3245 else if (s->main_pid != 0)
3246 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, pid, s->main_pid);
3247 else if (s->control_pid != 0)
3248 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for control PID "PID_FMT, pid, s->control_pid);
3249 else
3250 log_unit_warning(u, "Got notification message from PID "PID_FMT", but reception only permitted for main PID and control PID which are currently not known", pid);
3251 return;
3252 } else
3253 log_unit_debug(u, "Got notification message from PID "PID_FMT" (%s)", pid, isempty(cc) ? "n/a" : cc);
3254
3255 /* Interpret MAINPID= */
3256 e = strv_find_startswith(tags, "MAINPID=");
3257 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
3258 if (parse_pid(e, &pid) < 0)
3259 log_unit_warning(u, "Failed to parse MAINPID= field in notification message: %s", e);
3260 else if (pid == s->control_pid)
3261 log_unit_warning(u, "A control process cannot also be the main process");
3262 else if (pid == getpid() || pid == 1)
3263 log_unit_warning(u, "Service manager can't be main process, ignoring sd_notify() MAINPID= field");
3264 else {
3265 service_set_main_pid(s, pid);
3266 unit_watch_pid(UNIT(s), pid);
3267 notify_dbus = true;
3268 }
3269 }
3270
3271 /* Interpret RELOADING= */
3272 if (strv_find(tags, "RELOADING=1")) {
3273
3274 s->notify_state = NOTIFY_RELOADING;
3275
3276 if (s->state == SERVICE_RUNNING)
3277 service_enter_reload_by_notify(s);
3278
3279 notify_dbus = true;
3280 }
3281
3282 /* Interpret READY= */
3283 if (strv_find(tags, "READY=1")) {
3284
3285 s->notify_state = NOTIFY_READY;
3286
3287 /* Type=notify services inform us about completed
3288 * initialization with READY=1 */
3289 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
3290 service_enter_start_post(s);
3291
3292 /* Sending READY=1 while we are reloading informs us
3293 * that the reloading is complete */
3294 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
3295 service_enter_running(s, SERVICE_SUCCESS);
3296
3297 notify_dbus = true;
3298 }
3299
3300 /* Interpret STOPPING= */
3301 if (strv_find(tags, "STOPPING=1")) {
3302
3303 s->notify_state = NOTIFY_STOPPING;
3304
3305 if (s->state == SERVICE_RUNNING)
3306 service_enter_stop_by_notify(s);
3307
3308 notify_dbus = true;
3309 }
3310
3311 /* Interpret STATUS= */
3312 e = strv_find_startswith(tags, "STATUS=");
3313 if (e) {
3314 _cleanup_free_ char *t = NULL;
3315
3316 if (!isempty(e)) {
3317 if (!utf8_is_valid(e))
3318 log_unit_warning(u, "Status message in notification message is not UTF-8 clean.");
3319 else {
3320 t = strdup(e);
3321 if (!t)
3322 log_oom();
3323 }
3324 }
3325
3326 if (!streq_ptr(s->status_text, t)) {
3327
3328 free_and_replace(s->status_text, t);
3329
3330 notify_dbus = true;
3331 }
3332 }
3333
3334 /* Interpret ERRNO= */
3335 e = strv_find_startswith(tags, "ERRNO=");
3336 if (e) {
3337 int status_errno;
3338
3339 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
3340 log_unit_warning(u, "Failed to parse ERRNO= field in notification message: %s", e);
3341 else {
3342 if (s->status_errno != status_errno) {
3343 s->status_errno = status_errno;
3344 notify_dbus = true;
3345 }
3346 }
3347 }
3348
3349 /* Interpret WATCHDOG= */
3350 if (strv_find(tags, "WATCHDOG=1"))
3351 service_reset_watchdog(s);
3352
3353 if (strv_find(tags, "FDSTORE=1")) {
3354 const char *name;
3355
3356 name = strv_find_startswith(tags, "FDNAME=");
3357 if (name && !fdname_is_valid(name)) {
3358 log_unit_warning(u, "Passed FDNAME= name is invalid, ignoring.");
3359 name = NULL;
3360 }
3361
3362 service_add_fd_store_set(s, fds, name);
3363 }
3364
3365 e = strv_find_startswith(tags, "WATCHDOG_USEC=");
3366 if (e) {
3367 usec_t watchdog_override_usec;
3368 if (safe_atou64(e, &watchdog_override_usec) < 0)
3369 log_unit_warning(u, "Failed to parse WATCHDOG_USEC=%s", e);
3370 else
3371 service_reset_watchdog_timeout(s, watchdog_override_usec);
3372 }
3373
3374 /* Notify clients about changed status or main pid */
3375 if (notify_dbus)
3376 unit_add_to_dbus_queue(u);
3377}
3378
3379static int service_get_timeout(Unit *u, usec_t *timeout) {
3380 Service *s = SERVICE(u);
3381 uint64_t t;
3382 int r;
3383
3384 if (!s->timer_event_source)
3385 return 0;
3386
3387 r = sd_event_source_get_time(s->timer_event_source, &t);
3388 if (r < 0)
3389 return r;
3390 if (t == USEC_INFINITY)
3391 return 0;
3392
3393 *timeout = t;
3394 return 1;
3395}
3396
3397static void service_bus_name_owner_change(
3398 Unit *u,
3399 const char *name,
3400 const char *old_owner,
3401 const char *new_owner) {
3402
3403 Service *s = SERVICE(u);
3404 int r;
3405
3406 assert(s);
3407 assert(name);
3408
3409 assert(streq(s->bus_name, name));
3410 assert(old_owner || new_owner);
3411
3412 if (old_owner && new_owner)
3413 log_unit_debug(u, "D-Bus name %s changed owner from %s to %s", name, old_owner, new_owner);
3414 else if (old_owner)
3415 log_unit_debug(u, "D-Bus name %s no longer registered by %s", name, old_owner);
3416 else
3417 log_unit_debug(u, "D-Bus name %s now registered by %s", name, new_owner);
3418
3419 s->bus_name_good = !!new_owner;
3420
3421 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3422 r = free_and_strdup(&s->bus_name_owner, new_owner);
3423 if (r < 0) {
3424 log_unit_error_errno(u, r, "Unable to set new bus name owner %s: %m", new_owner);
3425 return;
3426 }
3427
3428 if (s->type == SERVICE_DBUS) {
3429
3430 /* service_enter_running() will figure out what to
3431 * do */
3432 if (s->state == SERVICE_RUNNING)
3433 service_enter_running(s, SERVICE_SUCCESS);
3434 else if (s->state == SERVICE_START && new_owner)
3435 service_enter_start_post(s);
3436
3437 } else if (new_owner &&
3438 s->main_pid <= 0 &&
3439 (s->state == SERVICE_START ||
3440 s->state == SERVICE_START_POST ||
3441 s->state == SERVICE_RUNNING ||
3442 s->state == SERVICE_RELOAD)) {
3443
3444 _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL;
3445 pid_t pid;
3446
3447 /* Try to acquire PID from bus service */
3448
3449 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3450 if (r >= 0)
3451 r = sd_bus_creds_get_pid(creds, &pid);
3452 if (r >= 0) {
3453 log_unit_debug(u, "D-Bus name %s is now owned by process " PID_FMT, name, pid);
3454
3455 service_set_main_pid(s, pid);
3456 unit_watch_pid(UNIT(s), pid);
3457 }
3458 }
3459}
3460
3461int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
3462 _cleanup_free_ char *peer = NULL;
3463 int r;
3464
3465 assert(s);
3466 assert(fd >= 0);
3467
3468 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3469 * to be configured. We take ownership of the passed fd on success. */
3470
3471 if (UNIT(s)->load_state != UNIT_LOADED)
3472 return -EINVAL;
3473
3474 if (s->socket_fd >= 0)
3475 return -EBUSY;
3476
3477 if (s->state != SERVICE_DEAD)
3478 return -EAGAIN;
3479
3480 if (getpeername_pretty(fd, true, &peer) >= 0) {
3481
3482 if (UNIT(s)->description) {
3483 _cleanup_free_ char *a;
3484
3485 a = strjoin(UNIT(s)->description, " (", peer, ")");
3486 if (!a)
3487 return -ENOMEM;
3488
3489 r = unit_set_description(UNIT(s), a);
3490 } else
3491 r = unit_set_description(UNIT(s), peer);
3492
3493 if (r < 0)
3494 return r;
3495 }
3496
3497 r = unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3498 if (r < 0)
3499 return r;
3500
3501 s->socket_fd = fd;
3502 s->socket_fd_selinux_context_net = selinux_context_net;
3503
3504 unit_ref_set(&s->accept_socket, UNIT(sock));
3505 return 0;
3506}
3507
3508static void service_reset_failed(Unit *u) {
3509 Service *s = SERVICE(u);
3510
3511 assert(s);
3512
3513 if (s->state == SERVICE_FAILED)
3514 service_set_state(s, SERVICE_DEAD);
3515
3516 s->result = SERVICE_SUCCESS;
3517 s->reload_result = SERVICE_SUCCESS;
3518}
3519
3520static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3521 Service *s = SERVICE(u);
3522
3523 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3524}
3525
3526static int service_main_pid(Unit *u) {
3527 Service *s = SERVICE(u);
3528
3529 assert(s);
3530
3531 return s->main_pid;
3532}
3533
3534static int service_control_pid(Unit *u) {
3535 Service *s = SERVICE(u);
3536
3537 assert(s);
3538
3539 return s->control_pid;
3540}
3541
3542static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3543 [SERVICE_RESTART_NO] = "no",
3544 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3545 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3546 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
3547 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3548 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3549 [SERVICE_RESTART_ALWAYS] = "always",
3550};
3551
3552DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3553
3554static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3555 [SERVICE_SIMPLE] = "simple",
3556 [SERVICE_FORKING] = "forking",
3557 [SERVICE_ONESHOT] = "oneshot",
3558 [SERVICE_DBUS] = "dbus",
3559 [SERVICE_NOTIFY] = "notify",
3560 [SERVICE_IDLE] = "idle"
3561};
3562
3563DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3564
3565static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3566 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3567 [SERVICE_EXEC_START] = "ExecStart",
3568 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3569 [SERVICE_EXEC_RELOAD] = "ExecReload",
3570 [SERVICE_EXEC_STOP] = "ExecStop",
3571 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3572};
3573
3574DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3575
3576static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3577 [NOTIFY_NONE] = "none",
3578 [NOTIFY_MAIN] = "main",
3579 [NOTIFY_EXEC] = "exec",
3580 [NOTIFY_ALL] = "all"
3581};
3582
3583DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3584
3585static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
3586 [NOTIFY_UNKNOWN] = "unknown",
3587 [NOTIFY_READY] = "ready",
3588 [NOTIFY_RELOADING] = "reloading",
3589 [NOTIFY_STOPPING] = "stopping",
3590};
3591
3592DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
3593
3594static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3595 [SERVICE_SUCCESS] = "success",
3596 [SERVICE_FAILURE_RESOURCES] = "resources",
3597 [SERVICE_FAILURE_PROTOCOL] = "protocol",
3598 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3599 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3600 [SERVICE_FAILURE_SIGNAL] = "signal",
3601 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3602 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3603 [SERVICE_FAILURE_START_LIMIT_HIT] = "start-limit-hit",
3604};
3605
3606DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3607
3608const UnitVTable service_vtable = {
3609 .object_size = sizeof(Service),
3610 .exec_context_offset = offsetof(Service, exec_context),
3611 .cgroup_context_offset = offsetof(Service, cgroup_context),
3612 .kill_context_offset = offsetof(Service, kill_context),
3613 .exec_runtime_offset = offsetof(Service, exec_runtime),
3614 .dynamic_creds_offset = offsetof(Service, dynamic_creds),
3615
3616 .sections =
3617 "Unit\0"
3618 "Service\0"
3619 "Install\0",
3620 .private_section = "Service",
3621
3622 .init = service_init,
3623 .done = service_done,
3624 .load = service_load,
3625 .release_resources = service_release_resources,
3626
3627 .coldplug = service_coldplug,
3628
3629 .dump = service_dump,
3630
3631 .start = service_start,
3632 .stop = service_stop,
3633 .reload = service_reload,
3634
3635 .can_reload = service_can_reload,
3636
3637 .kill = service_kill,
3638
3639 .serialize = service_serialize,
3640 .deserialize_item = service_deserialize_item,
3641
3642 .active_state = service_active_state,
3643 .sub_state_to_string = service_sub_state_to_string,
3644
3645 .check_gc = service_check_gc,
3646
3647 .sigchld_event = service_sigchld_event,
3648
3649 .reset_failed = service_reset_failed,
3650
3651 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3652 .notify_message = service_notify_message,
3653
3654 .main_pid = service_main_pid,
3655 .control_pid = service_control_pid,
3656
3657 .bus_name_owner_change = service_bus_name_owner_change,
3658
3659 .bus_vtable = bus_service_vtable,
3660 .bus_set_property = bus_service_set_property,
3661 .bus_commit_properties = bus_service_commit_properties,
3662
3663 .get_timeout = service_get_timeout,
3664 .can_transient = true,
3665
3666 .status_message_formats = {
3667 .starting_stopping = {
3668 [0] = "Starting %s...",
3669 [1] = "Stopping %s...",
3670 },
3671 .finished_start_job = {
3672 [JOB_DONE] = "Started %s.",
3673 [JOB_FAILED] = "Failed to start %s.",
3674 },
3675 .finished_stop_job = {
3676 [JOB_DONE] = "Stopped %s.",
3677 [JOB_FAILED] = "Stopped (with error) %s.",
3678 },
3679 },
3680};
Unnamed repository; edit this file 'description' to name the repository.