1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 #include "load-fragment.h"
32 #include "load-dropin.h"
35 #include "unit-name.h"
36 #include "unit-printf.h"
37 #include "dbus-service.h"
39 #include "exit-status.h"
41 #include "path-util.h"
46 #include "bus-error.h"
48 #include "bus-kernel.h"
50 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
51 [SERVICE_DEAD] = UNIT_INACTIVE,
52 [SERVICE_START_PRE] = UNIT_ACTIVATING,
53 [SERVICE_START] = UNIT_ACTIVATING,
54 [SERVICE_START_POST] = UNIT_ACTIVATING,
55 [SERVICE_RUNNING] = UNIT_ACTIVE,
56 [SERVICE_EXITED] = UNIT_ACTIVE,
57 [SERVICE_RELOAD] = UNIT_RELOADING,
58 [SERVICE_STOP] = UNIT_DEACTIVATING,
59 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
60 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
61 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
62 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
63 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
64 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
65 [SERVICE_FAILED] = UNIT_FAILED,
66 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
69 /* For Type=idle we never want to delay any other jobs, hence we
70 * consider idle jobs active as soon as we start working on them */
71 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
72 [SERVICE_DEAD] = UNIT_INACTIVE,
73 [SERVICE_START_PRE] = UNIT_ACTIVE,
74 [SERVICE_START] = UNIT_ACTIVE,
75 [SERVICE_START_POST] = UNIT_ACTIVE,
76 [SERVICE_RUNNING] = UNIT_ACTIVE,
77 [SERVICE_EXITED] = UNIT_ACTIVE,
78 [SERVICE_RELOAD] = UNIT_RELOADING,
79 [SERVICE_STOP] = UNIT_DEACTIVATING,
80 [SERVICE_STOP_SIGABRT] = UNIT_DEACTIVATING,
81 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
82 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
83 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
84 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
85 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
86 [SERVICE_FAILED] = UNIT_FAILED,
87 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
90 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
91 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
92 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
94 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
95 static void service_enter_reload_by_notify(Service *s);
97 static void service_init(Unit *u) {
98 Service *s = SERVICE(u);
101 assert(u->load_state == UNIT_STUB);
103 s->timeout_start_usec = u->manager->default_timeout_start_usec;
104 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
105 s->restart_usec = u->manager->default_restart_usec;
106 s->type = _SERVICE_TYPE_INVALID;
108 s->bus_endpoint_fd = -1;
109 s->guess_main_pid = true;
111 RATELIMIT_INIT(s->start_limit, u->manager->default_start_limit_interval, u->manager->default_start_limit_burst);
113 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
116 static void service_unwatch_control_pid(Service *s) {
119 if (s->control_pid <= 0)
122 unit_unwatch_pid(UNIT(s), s->control_pid);
126 static void service_unwatch_main_pid(Service *s) {
129 if (s->main_pid <= 0)
132 unit_unwatch_pid(UNIT(s), s->main_pid);
136 static void service_unwatch_pid_file(Service *s) {
137 if (!s->pid_file_pathspec)
140 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
141 path_spec_unwatch(s->pid_file_pathspec);
142 path_spec_done(s->pid_file_pathspec);
143 free(s->pid_file_pathspec);
144 s->pid_file_pathspec = NULL;
147 static int service_set_main_pid(Service *s, pid_t pid) {
158 if (s->main_pid == pid && s->main_pid_known)
161 if (s->main_pid != pid) {
162 service_unwatch_main_pid(s);
163 exec_status_start(&s->main_exec_status, pid);
167 s->main_pid_known = true;
169 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
170 log_warning_unit(UNIT(s)->id, "%s: Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.", UNIT(s)->id, pid);
171 s->main_pid_alien = true;
173 s->main_pid_alien = false;
178 static void service_close_socket_fd(Service *s) {
181 s->socket_fd = asynchronous_close(s->socket_fd);
184 static void service_connection_unref(Service *s) {
187 if (!UNIT_ISSET(s->accept_socket))
190 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
191 unit_ref_unset(&s->accept_socket);
194 static void service_stop_watchdog(Service *s) {
197 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
198 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
201 static void service_start_watchdog(Service *s) {
206 if (s->watchdog_usec <= 0)
209 if (s->watchdog_event_source) {
210 r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
212 log_warning_unit(UNIT(s)->id, "%s failed to reset watchdog timer: %s", UNIT(s)->id, strerror(-r));
216 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
218 r = sd_event_add_time(
219 UNIT(s)->manager->event,
220 &s->watchdog_event_source,
222 s->watchdog_timestamp.monotonic + s->watchdog_usec, 0,
223 service_dispatch_watchdog, s);
225 log_warning_unit(UNIT(s)->id, "%s failed to add watchdog timer: %s", UNIT(s)->id, strerror(-r));
229 /* Let's process everything else which might be a sign
230 * of living before we consider a service died. */
231 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
235 log_warning_unit(UNIT(s)->id, "%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
238 static void service_reset_watchdog(Service *s) {
241 dual_timestamp_get(&s->watchdog_timestamp);
242 service_start_watchdog(s);
245 static void service_done(Unit *u) {
246 Service *s = SERVICE(u);
253 free(s->status_text);
254 s->status_text = NULL;
257 s->reboot_arg = NULL;
259 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
260 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
261 s->control_command = NULL;
262 s->main_command = NULL;
264 exit_status_set_free(&s->restart_prevent_status);
265 exit_status_set_free(&s->restart_force_status);
266 exit_status_set_free(&s->success_status);
268 /* This will leak a process, but at least no memory or any of
270 service_unwatch_main_pid(s);
271 service_unwatch_control_pid(s);
272 service_unwatch_pid_file(s);
275 unit_unwatch_bus_name(u, s->bus_name);
280 s->bus_endpoint_fd = safe_close(s->bus_endpoint_fd);
281 service_close_socket_fd(s);
282 service_connection_unref(s);
284 unit_ref_unset(&s->accept_socket);
286 service_stop_watchdog(s);
288 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
291 static int service_arm_timer(Service *s, usec_t usec) {
296 if (s->timer_event_source) {
297 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
301 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
304 return sd_event_add_time(
305 UNIT(s)->manager->event,
306 &s->timer_event_source,
308 now(CLOCK_MONOTONIC) + usec, 0,
309 service_dispatch_timer, s);
312 static int service_verify(Service *s) {
315 if (UNIT(s)->load_state != UNIT_LOADED)
318 if (!s->exec_command[SERVICE_EXEC_START] && !s->exec_command[SERVICE_EXEC_STOP]) {
319 log_error_unit(UNIT(s)->id, "%s lacks both ExecStart= and ExecStop= setting. Refusing.", UNIT(s)->id);
323 if (s->type != SERVICE_ONESHOT && !s->exec_command[SERVICE_EXEC_START]) {
324 log_error_unit(UNIT(s)->id, "%s has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
328 if (!s->remain_after_exit && !s->exec_command[SERVICE_EXEC_START]) {
329 log_error_unit(UNIT(s)->id, "%s has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.", UNIT(s)->id);
333 if (s->type != SERVICE_ONESHOT && s->exec_command[SERVICE_EXEC_START]->command_next) {
334 log_error_unit(UNIT(s)->id, "%s has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
338 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
339 log_error_unit(UNIT(s)->id, "%s has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
343 if (s->type == SERVICE_ONESHOT && !exit_status_set_is_empty(&s->restart_force_status)) {
344 log_error_unit(UNIT(s)->id, "%s has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
348 if (s->type == SERVICE_DBUS && !s->bus_name) {
349 log_error_unit(UNIT(s)->id, "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
353 if (s->bus_name && s->type != SERVICE_DBUS)
354 log_warning_unit(UNIT(s)->id, "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
356 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
357 log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.", UNIT(s)->id);
364 static int service_add_default_dependencies(Service *s) {
369 /* Add a number of automatic dependencies useful for the
370 * majority of services. */
372 /* First, pull in base system */
373 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true);
377 /* Second, activate normal shutdown */
378 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
382 static void service_fix_output(Service *s) {
385 /* If nothing has been explicitly configured, patch default
386 * output in. If input is socket/tty we avoid this however,
387 * since in that case we want output to default to the same
388 * place as we read input from. */
390 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
391 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
392 s->exec_context.std_input == EXEC_INPUT_NULL)
393 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
395 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
396 s->exec_context.std_input == EXEC_INPUT_NULL)
397 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
400 static int service_load(Unit *u) {
401 Service *s = SERVICE(u);
406 /* Load a .service file */
407 r = unit_load_fragment(u);
411 /* Still nothing found? Then let's give up */
412 if (u->load_state == UNIT_STUB)
415 /* This is a new unit? Then let's add in some extras */
416 if (u->load_state == UNIT_LOADED) {
418 /* We were able to load something, then let's add in
419 * the dropin directories. */
420 r = unit_load_dropin(u);
424 if (s->type == _SERVICE_TYPE_INVALID) {
425 /* Figure out a type automatically */
427 s->type = SERVICE_DBUS;
428 else if (s->exec_command[SERVICE_EXEC_START])
429 s->type = SERVICE_SIMPLE;
431 s->type = SERVICE_ONESHOT;
434 /* Oneshot services have disabled start timeout by default */
435 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
436 s->timeout_start_usec = 0;
438 service_fix_output(s);
440 r = unit_patch_contexts(u);
444 r = unit_add_exec_dependencies(u, &s->exec_context);
448 r = unit_add_default_slice(u, &s->cgroup_context);
452 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
453 s->notify_access = NOTIFY_MAIN;
455 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
456 s->notify_access = NOTIFY_MAIN;
459 r = unit_watch_bus_name(u, s->bus_name);
464 if (u->default_dependencies) {
465 r = service_add_default_dependencies(s);
472 return service_verify(s);
475 static void service_dump(Unit *u, FILE *f, const char *prefix) {
476 ServiceExecCommand c;
477 Service *s = SERVICE(u);
482 prefix = strempty(prefix);
483 prefix2 = strappenda(prefix, "\t");
486 "%sService State: %s\n"
488 "%sReload Result: %s\n"
489 "%sPermissionsStartOnly: %s\n"
490 "%sRootDirectoryStartOnly: %s\n"
491 "%sRemainAfterExit: %s\n"
492 "%sGuessMainPID: %s\n"
495 "%sNotifyAccess: %s\n"
496 "%sNotifyState: %s\n",
497 prefix, service_state_to_string(s->state),
498 prefix, service_result_to_string(s->result),
499 prefix, service_result_to_string(s->reload_result),
500 prefix, yes_no(s->permissions_start_only),
501 prefix, yes_no(s->root_directory_start_only),
502 prefix, yes_no(s->remain_after_exit),
503 prefix, yes_no(s->guess_main_pid),
504 prefix, service_type_to_string(s->type),
505 prefix, service_restart_to_string(s->restart),
506 prefix, notify_access_to_string(s->notify_access),
507 prefix, notify_state_to_string(s->notify_state));
509 if (s->control_pid > 0)
511 "%sControl PID: "PID_FMT"\n",
512 prefix, s->control_pid);
516 "%sMain PID: "PID_FMT"\n"
517 "%sMain PID Known: %s\n"
518 "%sMain PID Alien: %s\n",
520 prefix, yes_no(s->main_pid_known),
521 prefix, yes_no(s->main_pid_alien));
526 prefix, s->pid_file);
531 "%sBus Name Good: %s\n",
533 prefix, yes_no(s->bus_name_good));
535 kill_context_dump(&s->kill_context, f, prefix);
536 exec_context_dump(&s->exec_context, f, prefix);
538 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
540 if (!s->exec_command[c])
543 fprintf(f, "%s-> %s:\n",
544 prefix, service_exec_command_to_string(c));
546 exec_command_dump_list(s->exec_command[c], f, prefix2);
549 #ifdef HAVE_SYSV_COMPAT
550 if (s->sysv_start_priority >= 0)
552 "%sSysVStartPriority: %i\n",
553 prefix, s->sysv_start_priority);
557 fprintf(f, "%sStatus Text: %s\n",
558 prefix, s->status_text);
561 static int service_load_pid_file(Service *s, bool may_warn) {
562 _cleanup_free_ char *k = NULL;
571 r = read_one_line_file(s->pid_file, &k);
574 log_info_unit(UNIT(s)->id, "PID file %s not readable (yet?) after %s.", s->pid_file, service_state_to_string(s->state));
578 r = parse_pid(k, &pid);
581 log_info_unit(UNIT(s)->id, "Failed to read PID from file %s: %s", s->pid_file, strerror(-r));
585 if (!pid_is_alive(pid)) {
587 log_info_unit(UNIT(s)->id, "PID "PID_FMT" read from file %s does not exist or is a zombie.", pid, s->pid_file);
591 if (s->main_pid_known) {
592 if (pid == s->main_pid)
595 log_debug_unit(UNIT(s)->id, "Main PID changing: "PID_FMT" -> "PID_FMT, s->main_pid, pid);
597 service_unwatch_main_pid(s);
598 s->main_pid_known = false;
600 log_debug_unit(UNIT(s)->id, "Main PID loaded: "PID_FMT, pid);
602 r = service_set_main_pid(s, pid);
606 r = unit_watch_pid(UNIT(s), pid);
608 /* FIXME: we need to do something here */
609 log_warning_unit(UNIT(s)->id, "Failed to watch PID "PID_FMT" from service %s", pid, UNIT(s)->id);
616 static int service_search_main_pid(Service *s) {
622 /* If we know it anyway, don't ever fallback to unreliable
624 if (s->main_pid_known)
627 if (!s->guess_main_pid)
630 assert(s->main_pid <= 0);
632 pid = unit_search_main_pid(UNIT(s));
636 log_debug_unit(UNIT(s)->id, "Main PID guessed: "PID_FMT, pid);
637 r = service_set_main_pid(s, pid);
641 r = unit_watch_pid(UNIT(s), pid);
643 /* FIXME: we need to do something here */
644 log_warning_unit(UNIT(s)->id, "Failed to watch PID "PID_FMT" from service %s", pid, UNIT(s)->id);
651 static void service_set_state(Service *s, ServiceState state) {
652 ServiceState old_state;
653 const UnitActiveState *table;
657 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
659 old_state = s->state;
662 service_unwatch_pid_file(s);
665 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
667 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
668 SERVICE_STOP_SIGABRT, SERVICE_STOP_POST,
669 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
670 SERVICE_AUTO_RESTART))
671 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
674 SERVICE_START, SERVICE_START_POST,
675 SERVICE_RUNNING, SERVICE_RELOAD,
676 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
677 SERVICE_STOP_SIGABRT, SERVICE_STOP_POST,
678 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
679 service_unwatch_main_pid(s);
680 s->main_command = NULL;
684 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
686 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
687 SERVICE_STOP_SIGABRT, SERVICE_STOP_POST,
688 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
689 service_unwatch_control_pid(s);
690 s->control_command = NULL;
691 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
694 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
695 unit_unwatch_all_pids(UNIT(s));
698 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
699 SERVICE_RUNNING, SERVICE_RELOAD,
700 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
701 SERVICE_STOP_SIGABRT, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
702 !(state == SERVICE_DEAD && UNIT(s)->job)) {
703 service_close_socket_fd(s);
704 service_connection_unref(s);
707 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
708 service_stop_watchdog(s);
710 /* For the inactive states unit_notify() will trim the cgroup,
711 * but for exit we have to do that ourselves... */
712 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
713 unit_destroy_cgroup(UNIT(s));
715 /* For remain_after_exit services, let's see if we can "release" the
716 * hold on the console, since unit_notify() only does that in case of
718 if (state == SERVICE_EXITED &&
719 s->remain_after_exit &&
720 UNIT(s)->manager->n_on_console > 0) {
724 ec = unit_get_exec_context(UNIT(s));
725 if (ec && exec_context_may_touch_console(ec)) {
726 Manager *m = UNIT(s)->manager;
729 if (m->n_on_console == 0)
730 /* unset no_console_output flag, since the console is free */
731 m->no_console_output = false;
735 if (old_state != state)
736 log_debug_unit(UNIT(s)->id, "%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
738 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
739 s->reload_result = SERVICE_SUCCESS;
742 static int service_coldplug(Unit *u) {
743 Service *s = SERVICE(u);
747 assert(s->state == SERVICE_DEAD);
749 if (s->deserialized_state != s->state) {
751 if (IN_SET(s->deserialized_state,
752 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
754 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
755 SERVICE_STOP_SIGABRT, SERVICE_STOP_POST,
756 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
760 k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec;
762 /* For the start/stop timeouts 0 means off */
764 r = service_arm_timer(s, k);
770 if (s->deserialized_state == SERVICE_AUTO_RESTART) {
772 /* The restart timeouts 0 means immediately */
773 r = service_arm_timer(s, s->restart_usec);
778 if (pid_is_unwaited(s->main_pid) &&
779 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
780 IN_SET(s->deserialized_state,
781 SERVICE_START, SERVICE_START_POST,
782 SERVICE_RUNNING, SERVICE_RELOAD,
783 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
784 SERVICE_STOP_SIGABRT, SERVICE_STOP_POST,
785 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
786 r = unit_watch_pid(UNIT(s), s->main_pid);
791 if (pid_is_unwaited(s->control_pid) &&
792 IN_SET(s->deserialized_state,
793 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
795 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
796 SERVICE_STOP_SIGABRT, SERVICE_STOP_POST,
797 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
798 r = unit_watch_pid(UNIT(s), s->control_pid);
803 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
804 unit_watch_all_pids(UNIT(s));
806 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
807 service_start_watchdog(s);
809 service_set_state(s, s->deserialized_state);
815 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
826 if (s->socket_fd >= 0)
829 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
834 if (u->type != UNIT_SOCKET)
839 r = socket_collect_fds(sock, &cfds, &cn_fds);
852 t = new(int, rn_fds+cn_fds);
859 memcpy(t, rfds, rn_fds * sizeof(int));
860 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
865 rn_fds = rn_fds+cn_fds;
880 static int service_spawn(
885 bool apply_permissions,
887 bool apply_tty_stdin,
894 _cleanup_free_ int *fdsbuf = NULL;
895 unsigned n_fds = 0, n_env = 0;
896 _cleanup_free_ char *bus_endpoint_path = NULL;
897 _cleanup_strv_free_ char
898 **argv = NULL, **final_env = NULL, **our_env = NULL;
900 ExecParameters exec_params = {
901 .apply_permissions = apply_permissions,
902 .apply_chroot = apply_chroot,
903 .apply_tty_stdin = apply_tty_stdin,
904 .bus_endpoint_fd = -1,
905 .selinux_context_net = s->socket_fd_selinux_context_net
912 unit_realize_cgroup(UNIT(s));
914 r = unit_setup_exec_runtime(UNIT(s));
919 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
920 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
921 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
923 if (s->socket_fd >= 0) {
927 r = service_collect_fds(s, &fdsbuf, &n_fds);
936 r = service_arm_timer(s, timeout);
940 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
942 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
946 our_env = new0(char*, 4);
952 if (is_control ? s->notify_access == NOTIFY_ALL : s->notify_access != NOTIFY_NONE)
953 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
959 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) {
964 if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
965 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) {
970 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
976 if (is_control && UNIT(s)->cgroup_path) {
977 path = strappenda(UNIT(s)->cgroup_path, "/control");
978 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
980 path = UNIT(s)->cgroup_path;
983 if (s->exec_context.bus_endpoint) {
984 r = bus_kernel_create_endpoint(UNIT(s)->manager->running_as == SYSTEMD_SYSTEM ? "system" : "user",
985 UNIT(s)->id, &bus_endpoint_path);
989 /* Pass the fd to the exec_params so that the child process can upload the policy.
990 * Keep a reference to the fd in the service, so the endpoint is kept alive as long
991 * as the service is running. */
992 exec_params.bus_endpoint_fd = s->bus_endpoint_fd = r;
996 exec_params.argv = argv;
997 exec_params.fds = fds;
998 exec_params.n_fds = n_fds;
999 exec_params.environment = final_env;
1000 exec_params.confirm_spawn = UNIT(s)->manager->confirm_spawn;
1001 exec_params.cgroup_supported = UNIT(s)->manager->cgroup_supported;
1002 exec_params.cgroup_path = path;
1003 exec_params.runtime_prefix = manager_get_runtime_prefix(UNIT(s)->manager);
1004 exec_params.unit_id = UNIT(s)->id;
1005 exec_params.watchdog_usec = s->watchdog_usec;
1006 exec_params.bus_endpoint_path = bus_endpoint_path;
1007 if (s->type == SERVICE_IDLE)
1008 exec_params.idle_pipe = UNIT(s)->manager->idle_pipe;
1018 r = unit_watch_pid(UNIT(s), pid);
1020 /* FIXME: we need to do something here */
1029 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1034 static int main_pid_good(Service *s) {
1037 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1040 /* If we know the pid file, then lets just check if it is
1042 if (s->main_pid_known) {
1044 /* If it's an alien child let's check if it is still
1046 if (s->main_pid_alien && s->main_pid > 0)
1047 return pid_is_alive(s->main_pid);
1049 /* .. otherwise assume we'll get a SIGCHLD for it,
1050 * which we really should wait for to collect exit
1051 * status and code */
1052 return s->main_pid > 0;
1055 /* We don't know the pid */
1059 _pure_ static int control_pid_good(Service *s) {
1062 return s->control_pid > 0;
1065 static int cgroup_good(Service *s) {
1070 if (!UNIT(s)->cgroup_path)
1073 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1080 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1084 if (f != SERVICE_SUCCESS)
1087 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1089 if (s->result != SERVICE_SUCCESS) {
1090 log_warning_unit(UNIT(s)->id, "%s failed.", UNIT(s)->id);
1091 failure_action(UNIT(s)->manager, s->failure_action, s->reboot_arg);
1094 if (allow_restart &&
1095 !s->forbid_restart &&
1096 (s->restart == SERVICE_RESTART_ALWAYS ||
1097 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1098 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1099 (s->restart == SERVICE_RESTART_ON_ABNORMAL && !IN_SET(s->result, SERVICE_SUCCESS, SERVICE_FAILURE_EXIT_CODE)) ||
1100 (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1101 (s->restart == SERVICE_RESTART_ON_ABORT && IN_SET(s->result, SERVICE_FAILURE_SIGNAL, SERVICE_FAILURE_CORE_DUMP)) ||
1102 (s->main_exec_status.code == CLD_EXITED && set_contains(s->restart_force_status.status, INT_TO_PTR(s->main_exec_status.status))) ||
1103 (IN_SET(s->main_exec_status.code, CLD_KILLED, CLD_DUMPED) && set_contains(s->restart_force_status.signal, INT_TO_PTR(s->main_exec_status.status)))) &&
1104 (s->main_exec_status.code != CLD_EXITED || !set_contains(s->restart_prevent_status.status, INT_TO_PTR(s->main_exec_status.status))) &&
1105 (!IN_SET(s->main_exec_status.code, CLD_KILLED, CLD_DUMPED) || !set_contains(s->restart_prevent_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
1107 r = service_arm_timer(s, s->restart_usec);
1111 service_set_state(s, SERVICE_AUTO_RESTART);
1114 s->forbid_restart = false;
1116 /* We want fresh tmpdirs in case service is started again immediately */
1117 exec_runtime_destroy(s->exec_runtime);
1118 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1120 /* Also, remove the runtime directory in */
1121 exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager));
1123 /* Try to delete the pid file. At this point it will be
1124 * out-of-date, and some software might be confused by it, so
1125 * let's remove it. */
1127 unlink_noerrno(s->pid_file);
1132 log_warning_unit(UNIT(s)->id, "%s failed to run install restart timer: %s", UNIT(s)->id, strerror(-r));
1133 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1136 static void service_enter_stop_post(Service *s, ServiceResult f) {
1140 if (f != SERVICE_SUCCESS)
1143 service_unwatch_control_pid(s);
1144 unit_watch_all_pids(UNIT(s));
1146 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1147 if (s->control_command) {
1148 s->control_command_id = SERVICE_EXEC_STOP_POST;
1150 r = service_spawn(s,
1152 s->timeout_stop_usec,
1154 !s->permissions_start_only,
1155 !s->root_directory_start_only,
1162 service_set_state(s, SERVICE_STOP_POST);
1164 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1169 log_warning_unit(UNIT(s)->id, "%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1170 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1173 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1178 if (f != SERVICE_SUCCESS)
1181 unit_watch_all_pids(UNIT(s));
1183 r = unit_kill_context(
1186 (state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM && state != SERVICE_STOP_SIGABRT) ?
1187 KILL_KILL : (state == SERVICE_STOP_SIGABRT ? KILL_ABORT : KILL_TERMINATE),
1196 if (s->timeout_stop_usec > 0) {
1197 r = service_arm_timer(s, s->timeout_stop_usec);
1202 service_set_state(s, state);
1203 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGABRT)
1204 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1205 else if (state == SERVICE_STOP_SIGKILL)
1206 service_enter_stop_post(s, SERVICE_SUCCESS);
1207 else if (state == SERVICE_FINAL_SIGTERM)
1208 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1210 service_enter_dead(s, SERVICE_SUCCESS, true);
1215 log_warning_unit(UNIT(s)->id, "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1217 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL ||
1218 state == SERVICE_STOP_SIGABRT)
1219 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1221 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1224 static void service_enter_stop_by_notify(Service *s) {
1227 unit_watch_all_pids(UNIT(s));
1229 if (s->timeout_stop_usec > 0)
1230 service_arm_timer(s, s->timeout_stop_usec);
1232 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1233 service_set_state(s, SERVICE_STOP_SIGTERM);
1236 static void service_enter_stop(Service *s, ServiceResult f) {
1241 if (f != SERVICE_SUCCESS)
1244 service_unwatch_control_pid(s);
1245 unit_watch_all_pids(UNIT(s));
1247 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1248 if (s->control_command) {
1249 s->control_command_id = SERVICE_EXEC_STOP;
1251 r = service_spawn(s,
1253 s->timeout_stop_usec,
1255 !s->permissions_start_only,
1256 !s->root_directory_start_only,
1263 service_set_state(s, SERVICE_STOP);
1265 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1270 log_warning_unit(UNIT(s)->id, "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
1271 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1274 static void service_enter_running(Service *s, ServiceResult f) {
1275 int main_pid_ok, cgroup_ok;
1278 if (f != SERVICE_SUCCESS)
1281 main_pid_ok = main_pid_good(s);
1282 cgroup_ok = cgroup_good(s);
1284 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1285 (s->bus_name_good || s->type != SERVICE_DBUS)) {
1287 /* If there are any queued up sd_notify()
1288 * notifications, process them now */
1289 if (s->notify_state == NOTIFY_RELOADING)
1290 service_enter_reload_by_notify(s);
1291 else if (s->notify_state == NOTIFY_STOPPING)
1292 service_enter_stop_by_notify(s);
1294 service_set_state(s, SERVICE_RUNNING);
1296 } else if (s->remain_after_exit)
1297 service_set_state(s, SERVICE_EXITED);
1299 service_enter_stop(s, SERVICE_SUCCESS);
1302 static void service_enter_start_post(Service *s) {
1306 service_unwatch_control_pid(s);
1307 service_reset_watchdog(s);
1309 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
1310 if (s->control_command) {
1311 s->control_command_id = SERVICE_EXEC_START_POST;
1313 r = service_spawn(s,
1315 s->timeout_start_usec,
1317 !s->permissions_start_only,
1318 !s->root_directory_start_only,
1325 service_set_state(s, SERVICE_START_POST);
1327 service_enter_running(s, SERVICE_SUCCESS);
1332 log_warning_unit(UNIT(s)->id, "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
1333 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1336 static void service_kill_control_processes(Service *s) {
1339 if (!UNIT(s)->cgroup_path)
1342 p = strappenda(UNIT(s)->cgroup_path, "/control");
1343 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
1346 static void service_enter_start(Service *s) {
1353 service_unwatch_control_pid(s);
1354 service_unwatch_main_pid(s);
1356 /* We want to ensure that nobody leaks processes from
1357 * START_PRE here, so let's go on a killing spree, People
1358 * should not spawn long running processes from START_PRE. */
1359 service_kill_control_processes(s);
1361 if (s->type == SERVICE_FORKING) {
1362 s->control_command_id = SERVICE_EXEC_START;
1363 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
1365 s->main_command = NULL;
1367 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1368 s->control_command = NULL;
1370 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
1374 assert(s->type == SERVICE_ONESHOT);
1375 service_enter_start_post(s);
1379 r = service_spawn(s,
1381 IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_NOTIFY, SERVICE_ONESHOT) ? s->timeout_start_usec : 0,
1391 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
1392 /* For simple services we immediately start
1393 * the START_POST binaries. */
1395 service_set_main_pid(s, pid);
1396 service_enter_start_post(s);
1398 } else if (s->type == SERVICE_FORKING) {
1400 /* For forking services we wait until the start
1401 * process exited. */
1403 s->control_pid = pid;
1404 service_set_state(s, SERVICE_START);
1406 } else if (s->type == SERVICE_ONESHOT ||
1407 s->type == SERVICE_DBUS ||
1408 s->type == SERVICE_NOTIFY) {
1410 /* For oneshot services we wait until the start
1411 * process exited, too, but it is our main process. */
1413 /* For D-Bus services we know the main pid right away,
1414 * but wait for the bus name to appear on the
1415 * bus. Notify services are similar. */
1417 service_set_main_pid(s, pid);
1418 service_set_state(s, SERVICE_START);
1420 assert_not_reached("Unknown service type");
1425 log_warning_unit(UNIT(s)->id, "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
1426 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1429 static void service_enter_start_pre(Service *s) {
1434 service_unwatch_control_pid(s);
1436 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
1437 if (s->control_command) {
1438 /* Before we start anything, let's clear up what might
1439 * be left from previous runs. */
1440 service_kill_control_processes(s);
1442 s->control_command_id = SERVICE_EXEC_START_PRE;
1444 r = service_spawn(s,
1446 s->timeout_start_usec,
1448 !s->permissions_start_only,
1449 !s->root_directory_start_only,
1456 service_set_state(s, SERVICE_START_PRE);
1458 service_enter_start(s);
1463 log_warning_unit(UNIT(s)->id, "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
1464 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1467 static void service_enter_restart(Service *s) {
1468 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
1473 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
1474 /* Don't restart things if we are going down anyway */
1475 log_info_unit(UNIT(s)->id, "Stop job pending for unit, delaying automatic restart.");
1477 r = service_arm_timer(s, s->restart_usec);
1484 /* Any units that are bound to this service must also be
1485 * restarted. We use JOB_RESTART (instead of the more obvious
1486 * JOB_START) here so that those dependency jobs will be added
1488 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
1492 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
1493 * it will be canceled as part of the service_stop() call that
1494 * is executed as part of JOB_RESTART. */
1496 log_debug_unit(UNIT(s)->id, "%s scheduled restart job.", UNIT(s)->id);
1500 log_warning_unit(UNIT(s)->id, "%s failed to schedule restart job: %s", UNIT(s)->id, bus_error_message(&error, -r));
1501 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1504 static void service_enter_reload_by_notify(Service *s) {
1507 if (s->timeout_start_usec > 0)
1508 service_arm_timer(s, s->timeout_start_usec);
1510 service_set_state(s, SERVICE_RELOAD);
1513 static void service_enter_reload(Service *s) {
1518 service_unwatch_control_pid(s);
1520 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
1521 if (s->control_command) {
1522 s->control_command_id = SERVICE_EXEC_RELOAD;
1524 r = service_spawn(s,
1526 s->timeout_start_usec,
1528 !s->permissions_start_only,
1529 !s->root_directory_start_only,
1536 service_set_state(s, SERVICE_RELOAD);
1538 service_enter_running(s, SERVICE_SUCCESS);
1543 log_warning_unit(UNIT(s)->id, "%s failed to run 'reload' task: %s", UNIT(s)->id, strerror(-r));
1544 s->reload_result = SERVICE_FAILURE_RESOURCES;
1545 service_enter_running(s, SERVICE_SUCCESS);
1548 static void service_run_next_control(Service *s) {
1552 assert(s->control_command);
1553 assert(s->control_command->command_next);
1555 assert(s->control_command_id != SERVICE_EXEC_START);
1557 s->control_command = s->control_command->command_next;
1558 service_unwatch_control_pid(s);
1560 r = service_spawn(s,
1562 IN_SET(s->state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec,
1564 !s->permissions_start_only,
1565 !s->root_directory_start_only,
1566 s->control_command_id == SERVICE_EXEC_START_PRE ||
1567 s->control_command_id == SERVICE_EXEC_STOP_POST,
1576 log_warning_unit(UNIT(s)->id, "%s failed to run next control task: %s", UNIT(s)->id, strerror(-r));
1578 if (s->state == SERVICE_START_PRE)
1579 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1580 else if (s->state == SERVICE_STOP)
1581 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
1582 else if (s->state == SERVICE_STOP_POST)
1583 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1584 else if (s->state == SERVICE_RELOAD) {
1585 s->reload_result = SERVICE_FAILURE_RESOURCES;
1586 service_enter_running(s, SERVICE_SUCCESS);
1588 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1591 static void service_run_next_main(Service *s) {
1596 assert(s->main_command);
1597 assert(s->main_command->command_next);
1598 assert(s->type == SERVICE_ONESHOT);
1600 s->main_command = s->main_command->command_next;
1601 service_unwatch_main_pid(s);
1603 r = service_spawn(s,
1605 s->timeout_start_usec,
1615 service_set_main_pid(s, pid);
1620 log_warning_unit(UNIT(s)->id, "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
1621 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
1624 static int service_start_limit_test(Service *s) {
1627 if (ratelimit_test(&s->start_limit))
1630 log_warning_unit(UNIT(s)->id, "start request repeated too quickly for %s", UNIT(s)->id);
1632 return failure_action(UNIT(s)->manager, s->start_limit_action, s->reboot_arg);
1635 static int service_start(Unit *u) {
1636 Service *s = SERVICE(u);
1641 /* We cannot fulfill this request right now, try again later
1643 if (s->state == SERVICE_STOP ||
1644 s->state == SERVICE_STOP_SIGABRT ||
1645 s->state == SERVICE_STOP_SIGTERM ||
1646 s->state == SERVICE_STOP_SIGKILL ||
1647 s->state == SERVICE_STOP_POST ||
1648 s->state == SERVICE_FINAL_SIGTERM ||
1649 s->state == SERVICE_FINAL_SIGKILL)
1652 /* Already on it! */
1653 if (s->state == SERVICE_START_PRE ||
1654 s->state == SERVICE_START ||
1655 s->state == SERVICE_START_POST)
1658 /* A service that will be restarted must be stopped first to
1659 * trigger BindsTo and/or OnFailure dependencies. If a user
1660 * does not want to wait for the holdoff time to elapse, the
1661 * service should be manually restarted, not started. We
1662 * simply return EAGAIN here, so that any start jobs stay
1663 * queued, and assume that the auto restart timer will
1664 * eventually trigger the restart. */
1665 if (s->state == SERVICE_AUTO_RESTART)
1668 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
1670 /* Make sure we don't enter a busy loop of some kind. */
1671 r = service_start_limit_test(s);
1673 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
1677 s->result = SERVICE_SUCCESS;
1678 s->reload_result = SERVICE_SUCCESS;
1679 s->main_pid_known = false;
1680 s->main_pid_alien = false;
1681 s->forbid_restart = false;
1683 free(s->status_text);
1684 s->status_text = NULL;
1685 s->status_errno = 0;
1687 s->notify_state = NOTIFY_UNKNOWN;
1689 service_enter_start_pre(s);
1693 static int service_stop(Unit *u) {
1694 Service *s = SERVICE(u);
1698 /* Don't create restart jobs from here. */
1699 s->forbid_restart = true;
1702 if (s->state == SERVICE_STOP ||
1703 s->state == SERVICE_STOP_SIGABRT ||
1704 s->state == SERVICE_STOP_SIGTERM ||
1705 s->state == SERVICE_STOP_SIGKILL ||
1706 s->state == SERVICE_STOP_POST ||
1707 s->state == SERVICE_FINAL_SIGTERM ||
1708 s->state == SERVICE_FINAL_SIGKILL)
1711 /* A restart will be scheduled or is in progress. */
1712 if (s->state == SERVICE_AUTO_RESTART) {
1713 service_set_state(s, SERVICE_DEAD);
1717 /* If there's already something running we go directly into
1719 if (s->state == SERVICE_START_PRE ||
1720 s->state == SERVICE_START ||
1721 s->state == SERVICE_START_POST ||
1722 s->state == SERVICE_RELOAD) {
1723 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
1727 assert(s->state == SERVICE_RUNNING ||
1728 s->state == SERVICE_EXITED);
1730 service_enter_stop(s, SERVICE_SUCCESS);
1734 static int service_reload(Unit *u) {
1735 Service *s = SERVICE(u);
1739 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1741 service_enter_reload(s);
1745 _pure_ static bool service_can_reload(Unit *u) {
1746 Service *s = SERVICE(u);
1750 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1753 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1754 Service *s = SERVICE(u);
1760 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1761 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
1762 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
1764 if (s->control_pid > 0)
1765 unit_serialize_item_format(u, f, "control-pid", PID_FMT,
1768 if (s->main_pid_known && s->main_pid > 0)
1769 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
1771 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1774 unit_serialize_item(u, f, "status-text", s->status_text);
1776 /* FIXME: There's a minor uncleanliness here: if there are
1777 * multiple commands attached here, we will start from the
1778 * first one again */
1779 if (s->control_command_id >= 0)
1780 unit_serialize_item(u, f, "control-command",
1781 service_exec_command_to_string(s->control_command_id));
1783 if (s->socket_fd >= 0) {
1786 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1789 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1792 if (s->bus_endpoint_fd >= 0) {
1795 if ((copy = fdset_put_dup(fds, s->bus_endpoint_fd)) < 0)
1798 unit_serialize_item_format(u, f, "endpoint-fd", "%i", copy);
1801 if (s->main_exec_status.pid > 0) {
1802 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT,
1803 s->main_exec_status.pid);
1804 dual_timestamp_serialize(f, "main-exec-status-start",
1805 &s->main_exec_status.start_timestamp);
1806 dual_timestamp_serialize(f, "main-exec-status-exit",
1807 &s->main_exec_status.exit_timestamp);
1809 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
1810 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
1811 s->main_exec_status.code);
1812 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
1813 s->main_exec_status.status);
1816 if (dual_timestamp_is_set(&s->watchdog_timestamp))
1817 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
1819 if (s->forbid_restart)
1820 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
1825 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1826 Service *s = SERVICE(u);
1833 if (streq(key, "state")) {
1836 state = service_state_from_string(value);
1838 log_debug_unit(u->id, "Failed to parse state value %s", value);
1840 s->deserialized_state = state;
1841 } else if (streq(key, "result")) {
1844 f = service_result_from_string(value);
1846 log_debug_unit(u->id, "Failed to parse result value %s", value);
1847 else if (f != SERVICE_SUCCESS)
1850 } else if (streq(key, "reload-result")) {
1853 f = service_result_from_string(value);
1855 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
1856 else if (f != SERVICE_SUCCESS)
1857 s->reload_result = f;
1859 } else if (streq(key, "control-pid")) {
1862 if (parse_pid(value, &pid) < 0)
1863 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
1865 s->control_pid = pid;
1866 } else if (streq(key, "main-pid")) {
1869 if (parse_pid(value, &pid) < 0)
1870 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
1872 service_set_main_pid(s, pid);
1873 unit_watch_pid(UNIT(s), pid);
1875 } else if (streq(key, "main-pid-known")) {
1878 b = parse_boolean(value);
1880 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
1882 s->main_pid_known = b;
1883 } else if (streq(key, "status-text")) {
1890 free(s->status_text);
1894 } else if (streq(key, "control-command")) {
1895 ServiceExecCommand id;
1897 id = service_exec_command_from_string(value);
1899 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
1901 s->control_command_id = id;
1902 s->control_command = s->exec_command[id];
1904 } else if (streq(key, "socket-fd")) {
1907 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1908 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
1910 asynchronous_close(s->socket_fd);
1911 s->socket_fd = fdset_remove(fds, fd);
1913 } else if (streq(key, "endpoint-fd")) {
1916 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1917 log_debug_unit(u->id, "Failed to parse endpoint-fd value %s", value);
1919 safe_close(s->bus_endpoint_fd);
1920 s->bus_endpoint_fd = fdset_remove(fds, fd);
1922 } else if (streq(key, "main-exec-status-pid")) {
1925 if (parse_pid(value, &pid) < 0)
1926 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
1928 s->main_exec_status.pid = pid;
1929 } else if (streq(key, "main-exec-status-code")) {
1932 if (safe_atoi(value, &i) < 0)
1933 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
1935 s->main_exec_status.code = i;
1936 } else if (streq(key, "main-exec-status-status")) {
1939 if (safe_atoi(value, &i) < 0)
1940 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
1942 s->main_exec_status.status = i;
1943 } else if (streq(key, "main-exec-status-start"))
1944 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
1945 else if (streq(key, "main-exec-status-exit"))
1946 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
1947 else if (streq(key, "watchdog-timestamp"))
1948 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
1949 else if (streq(key, "forbid-restart")) {
1952 b = parse_boolean(value);
1954 log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
1956 s->forbid_restart = b;
1958 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
1963 _pure_ static UnitActiveState service_active_state(Unit *u) {
1964 const UnitActiveState *table;
1968 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1970 return table[SERVICE(u)->state];
1973 static const char *service_sub_state_to_string(Unit *u) {
1976 return service_state_to_string(SERVICE(u)->state);
1979 static bool service_check_gc(Unit *u) {
1980 Service *s = SERVICE(u);
1984 /* Never clean up services that still have a process around,
1985 * even if the service is formally dead. */
1986 if (cgroup_good(s) > 0 ||
1987 main_pid_good(s) > 0 ||
1988 control_pid_good(s) > 0)
1994 _pure_ static bool service_check_snapshot(Unit *u) {
1995 Service *s = SERVICE(u);
1999 return s->socket_fd < 0;
2002 static int service_retry_pid_file(Service *s) {
2005 assert(s->pid_file);
2006 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2008 r = service_load_pid_file(s, false);
2012 service_unwatch_pid_file(s);
2014 service_enter_running(s, SERVICE_SUCCESS);
2018 static int service_watch_pid_file(Service *s) {
2021 log_debug_unit(UNIT(s)->id, "Setting watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
2023 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2027 /* the pidfile might have appeared just before we set the watch */
2028 log_debug_unit(UNIT(s)->id, "Trying to read %s's PID file %s in case it changed", UNIT(s)->id, s->pid_file_pathspec->path);
2029 service_retry_pid_file(s);
2033 log_error_unit(UNIT(s)->id, "Failed to set a watch for %s's PID file %s: %s", UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2034 service_unwatch_pid_file(s);
2038 static int service_demand_pid_file(Service *s) {
2041 assert(s->pid_file);
2042 assert(!s->pid_file_pathspec);
2044 ps = new0(PathSpec, 1);
2049 ps->path = strdup(s->pid_file);
2055 path_kill_slashes(ps->path);
2057 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2058 * keep their PID file open all the time. */
2059 ps->type = PATH_MODIFIED;
2060 ps->inotify_fd = -1;
2062 s->pid_file_pathspec = ps;
2064 return service_watch_pid_file(s);
2067 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2068 PathSpec *p = userdata;
2073 s = SERVICE(p->unit);
2077 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2078 assert(s->pid_file_pathspec);
2079 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2081 log_debug_unit(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
2083 if (path_spec_fd_event(p, events) < 0)
2086 if (service_retry_pid_file(s) == 0)
2089 if (service_watch_pid_file(s) < 0)
2095 service_unwatch_pid_file(s);
2096 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2100 static void service_notify_cgroup_empty_event(Unit *u) {
2101 Service *s = SERVICE(u);
2105 log_debug_unit(u->id, "%s: cgroup is empty", u->id);
2109 /* Waiting for SIGCHLD is usually more interesting,
2110 * because it includes return codes/signals. Which is
2111 * why we ignore the cgroup events for most cases,
2112 * except when we don't know pid which to expect the
2116 case SERVICE_START_POST:
2117 /* If we were hoping for the daemon to write its PID file,
2118 * we can give up now. */
2119 if (s->pid_file_pathspec) {
2120 log_warning_unit(u->id, "%s never wrote its PID file. Failing.", UNIT(s)->id);
2122 service_unwatch_pid_file(s);
2123 if (s->state == SERVICE_START)
2124 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2126 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2130 case SERVICE_RUNNING:
2131 /* service_enter_running() will figure out what to do */
2132 service_enter_running(s, SERVICE_SUCCESS);
2135 case SERVICE_STOP_SIGABRT:
2136 case SERVICE_STOP_SIGTERM:
2137 case SERVICE_STOP_SIGKILL:
2139 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2140 service_enter_stop_post(s, SERVICE_SUCCESS);
2144 case SERVICE_STOP_POST:
2145 case SERVICE_FINAL_SIGTERM:
2146 case SERVICE_FINAL_SIGKILL:
2147 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2148 service_enter_dead(s, SERVICE_SUCCESS, true);
2157 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2158 Service *s = SERVICE(u);
2164 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2165 is_clean_exit_lsb(code, status, &s->success_status))
2166 f = SERVICE_SUCCESS;
2167 else if (code == CLD_EXITED)
2168 f = SERVICE_FAILURE_EXIT_CODE;
2169 else if (code == CLD_KILLED)
2170 f = SERVICE_FAILURE_SIGNAL;
2171 else if (code == CLD_DUMPED)
2172 f = SERVICE_FAILURE_CORE_DUMP;
2174 assert_not_reached("Unknown code");
2176 if (s->main_pid == pid) {
2177 /* Forking services may occasionally move to a new PID.
2178 * As long as they update the PID file before exiting the old
2179 * PID, they're fine. */
2180 if (service_load_pid_file(s, false) == 0)
2184 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2186 if (s->main_command) {
2187 /* If this is not a forking service than the
2188 * main process got started and hence we copy
2189 * the exit status so that it is recorded both
2190 * as main and as control process exit
2193 s->main_command->exec_status = s->main_exec_status;
2195 if (s->main_command->ignore)
2196 f = SERVICE_SUCCESS;
2197 } else if (s->exec_command[SERVICE_EXEC_START]) {
2199 /* If this is a forked process, then we should
2200 * ignore the return value if this was
2201 * configured for the starter process */
2203 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2204 f = SERVICE_SUCCESS;
2207 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2209 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
2210 u->id, sigchld_code_to_string(code), status,
2211 strna(code == CLD_EXITED
2212 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2213 : signal_to_string(status)),
2214 "EXIT_CODE=%s", sigchld_code_to_string(code),
2215 "EXIT_STATUS=%i", status,
2218 if (f != SERVICE_SUCCESS)
2221 if (s->main_command &&
2222 s->main_command->command_next &&
2223 f == SERVICE_SUCCESS) {
2225 /* There is another command to *
2226 * execute, so let's do that. */
2228 log_debug_unit(u->id, "%s running next main command for state %s", u->id, service_state_to_string(s->state));
2229 service_run_next_main(s);
2233 /* The service exited, so the service is officially
2235 s->main_command = NULL;
2239 case SERVICE_START_POST:
2240 case SERVICE_RELOAD:
2242 /* Need to wait until the operation is
2247 if (s->type == SERVICE_ONESHOT) {
2248 /* This was our main goal, so let's go on */
2249 if (f == SERVICE_SUCCESS)
2250 service_enter_start_post(s);
2252 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2258 case SERVICE_RUNNING:
2259 service_enter_running(s, f);
2262 case SERVICE_STOP_SIGABRT:
2263 case SERVICE_STOP_SIGTERM:
2264 case SERVICE_STOP_SIGKILL:
2266 if (!control_pid_good(s))
2267 service_enter_stop_post(s, f);
2269 /* If there is still a control process, wait for that first */
2272 case SERVICE_STOP_POST:
2273 case SERVICE_FINAL_SIGTERM:
2274 case SERVICE_FINAL_SIGKILL:
2276 if (!control_pid_good(s))
2277 service_enter_dead(s, f, true);
2281 assert_not_reached("Uh, main process died at wrong time.");
2285 } else if (s->control_pid == pid) {
2288 if (s->control_command) {
2289 exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2291 if (s->control_command->ignore)
2292 f = SERVICE_SUCCESS;
2295 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
2296 "%s: control process exited, code=%s status=%i",
2297 u->id, sigchld_code_to_string(code), status);
2299 if (f != SERVICE_SUCCESS)
2302 /* Immediately get rid of the cgroup, so that the
2303 * kernel doesn't delay the cgroup empty messages for
2304 * the service cgroup any longer than necessary */
2305 service_kill_control_processes(s);
2307 if (s->control_command &&
2308 s->control_command->command_next &&
2309 f == SERVICE_SUCCESS) {
2311 /* There is another command to *
2312 * execute, so let's do that. */
2314 log_debug_unit(u->id, "%s running next control command for state %s", u->id, service_state_to_string(s->state));
2315 service_run_next_control(s);
2318 /* No further commands for this step, so let's
2319 * figure out what to do next */
2321 s->control_command = NULL;
2322 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2324 log_debug_unit(u->id, "%s got final SIGCHLD for state %s", u->id, service_state_to_string(s->state));
2328 case SERVICE_START_PRE:
2329 if (f == SERVICE_SUCCESS)
2330 service_enter_start(s);
2332 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2336 if (s->type != SERVICE_FORKING)
2337 /* Maybe spurious event due to a reload that changed the type? */
2340 if (f != SERVICE_SUCCESS) {
2341 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2346 bool has_start_post;
2349 /* Let's try to load the pid file here if we can.
2350 * The PID file might actually be created by a START_POST
2351 * script. In that case don't worry if the loading fails. */
2353 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2354 r = service_load_pid_file(s, !has_start_post);
2355 if (!has_start_post && r < 0) {
2356 r = service_demand_pid_file(s);
2357 if (r < 0 || !cgroup_good(s))
2358 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2362 service_search_main_pid(s);
2364 service_enter_start_post(s);
2367 case SERVICE_START_POST:
2368 if (f != SERVICE_SUCCESS) {
2369 service_enter_stop(s, f);
2376 r = service_load_pid_file(s, true);
2378 r = service_demand_pid_file(s);
2379 if (r < 0 || !cgroup_good(s))
2380 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2384 service_search_main_pid(s);
2386 service_enter_running(s, SERVICE_SUCCESS);
2389 case SERVICE_RELOAD:
2390 if (f == SERVICE_SUCCESS) {
2391 service_load_pid_file(s, true);
2392 service_search_main_pid(s);
2395 s->reload_result = f;
2396 service_enter_running(s, SERVICE_SUCCESS);
2400 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2403 case SERVICE_STOP_SIGABRT:
2404 case SERVICE_STOP_SIGTERM:
2405 case SERVICE_STOP_SIGKILL:
2406 if (main_pid_good(s) <= 0)
2407 service_enter_stop_post(s, f);
2409 /* If there is still a service
2410 * process around, wait until
2411 * that one quit, too */
2414 case SERVICE_STOP_POST:
2415 case SERVICE_FINAL_SIGTERM:
2416 case SERVICE_FINAL_SIGKILL:
2417 if (main_pid_good(s) <= 0)
2418 service_enter_dead(s, f, true);
2422 assert_not_reached("Uh, control process died at wrong time.");
2427 /* Notify clients about changed exit status */
2428 unit_add_to_dbus_queue(u);
2430 /* We got one SIGCHLD for the service, let's watch all
2431 * processes that are now running of the service, and watch
2432 * that. Among the PIDs we then watch will be children
2433 * reassigned to us, which hopefully allows us to identify
2434 * when all children are gone */
2435 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
2436 unit_watch_all_pids(u);
2438 /* If the PID set is empty now, then let's finish this off */
2439 if (set_isempty(u->pids))
2440 service_notify_cgroup_empty_event(u);
2443 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
2444 Service *s = SERVICE(userdata);
2447 assert(source == s->timer_event_source);
2451 case SERVICE_START_PRE:
2453 log_warning_unit(UNIT(s)->id, "%s %s operation timed out. Terminating.", UNIT(s)->id, s->state == SERVICE_START ? "start" : "start-pre");
2454 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2457 case SERVICE_START_POST:
2458 log_warning_unit(UNIT(s)->id, "%s start-post operation timed out. Stopping.", UNIT(s)->id);
2459 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
2462 case SERVICE_RELOAD:
2463 log_warning_unit(UNIT(s)->id, "%s reload operation timed out. Stopping.", UNIT(s)->id);
2464 s->reload_result = SERVICE_FAILURE_TIMEOUT;
2465 service_enter_running(s, SERVICE_SUCCESS);
2469 log_warning_unit(UNIT(s)->id, "%s stopping timed out. Terminating.", UNIT(s)->id);
2470 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2473 case SERVICE_STOP_SIGABRT:
2474 log_warning_unit(UNIT(s)->id,
2475 "%s stop-sigabrt timed out. Terminating.", UNIT(s)->id);
2476 service_enter_signal(s, SERVICE_STOP_SIGTERM, s->result);
2479 case SERVICE_STOP_SIGTERM:
2480 if (s->kill_context.send_sigkill) {
2481 log_warning_unit(UNIT(s)->id, "%s stop-sigterm timed out. Killing.", UNIT(s)->id);
2482 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2484 log_warning_unit(UNIT(s)->id, "%s stop-sigterm timed out. Skipping SIGKILL.", UNIT(s)->id);
2485 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2490 case SERVICE_STOP_SIGKILL:
2491 /* Uh, we sent a SIGKILL and it is still not gone?
2492 * Must be something we cannot kill, so let's just be
2493 * weirded out and continue */
2495 log_warning_unit(UNIT(s)->id, "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
2496 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
2499 case SERVICE_STOP_POST:
2500 log_warning_unit(UNIT(s)->id, "%s stop-post timed out. Terminating.", UNIT(s)->id);
2501 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
2504 case SERVICE_FINAL_SIGTERM:
2505 if (s->kill_context.send_sigkill) {
2506 log_warning_unit(UNIT(s)->id, "%s stop-final-sigterm timed out. Killing.", UNIT(s)->id);
2507 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
2509 log_warning_unit(UNIT(s)->id, "%s stop-final-sigterm timed out. Skipping SIGKILL. Entering failed mode.", UNIT(s)->id);
2510 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
2515 case SERVICE_FINAL_SIGKILL:
2516 log_warning_unit(UNIT(s)->id, "%s still around after final SIGKILL. Entering failed mode.", UNIT(s)->id);
2517 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
2520 case SERVICE_AUTO_RESTART:
2521 log_info_unit(UNIT(s)->id,
2522 s->restart_usec > 0 ?
2523 "%s holdoff time over, scheduling restart." :
2524 "%s has no holdoff time, scheduling restart.",
2526 service_enter_restart(s);
2530 assert_not_reached("Timeout at wrong time.");
2536 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
2537 Service *s = SERVICE(userdata);
2538 char t[FORMAT_TIMESPAN_MAX];
2541 assert(source == s->watchdog_event_source);
2543 log_error_unit(UNIT(s)->id, "%s watchdog timeout (limit %s)!", UNIT(s)->id,
2544 format_timespan(t, sizeof(t), s->watchdog_usec, 1));
2546 service_enter_signal(s, SERVICE_STOP_SIGABRT, SERVICE_FAILURE_WATCHDOG);
2551 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2552 Service *s = SERVICE(u);
2553 _cleanup_free_ char *cc = NULL;
2554 bool notify_dbus = false;
2559 cc = strv_join(tags, ", ");
2560 log_debug_unit(u->id, "%s: Got notification message from PID "PID_FMT" (%s)",
2561 u->id, pid, isempty(cc) ? "n/a" : cc);
2563 if (s->notify_access == NOTIFY_NONE) {
2564 log_warning_unit(u->id, "%s: Got notification message from PID "PID_FMT", but reception is disabled.", u->id, pid);
2568 if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2569 if (s->main_pid != 0)
2570 log_warning_unit(u->id, "%s: Got notification message from PID "PID_FMT", but reception only permitted for main PID "PID_FMT, u->id, pid, s->main_pid);
2572 log_debug_unit(u->id, "%s: Got notification message from PID "PID_FMT", but reception only permitted for main PID which is currently not known", u->id, pid);
2576 /* Interpret MAINPID= */
2577 e = strv_find_startswith(tags, "MAINPID=");
2578 if (e && IN_SET(s->state, SERVICE_START, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD)) {
2579 if (parse_pid(e, &pid) < 0)
2580 log_warning_unit(u->id, "Failed to parse MAINPID= field in notification message: %s", e);
2582 log_debug_unit(u->id, "%s: got MAINPID=%s", u->id, e);
2584 service_set_main_pid(s, pid);
2585 unit_watch_pid(UNIT(s), pid);
2590 /* Interpret RELOADING= */
2591 if (strv_find(tags, "RELOADING=1")) {
2593 log_debug_unit(u->id, "%s: got RELOADING=1", u->id);
2594 s->notify_state = NOTIFY_RELOADING;
2596 if (s->state == SERVICE_RUNNING)
2597 service_enter_reload_by_notify(s);
2602 /* Interpret READY= */
2603 if (strv_find(tags, "READY=1")) {
2605 log_debug_unit(u->id, "%s: got READY=1", u->id);
2606 s->notify_state = NOTIFY_READY;
2608 /* Type=notify services inform us about completed
2609 * initialization with READY=1 */
2610 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START)
2611 service_enter_start_post(s);
2613 /* Sending READY=1 while we are reloading informs us
2614 * that the reloading is complete */
2615 if (s->state == SERVICE_RELOAD && s->control_pid == 0)
2616 service_enter_running(s, SERVICE_SUCCESS);
2621 /* Interpret STOPPING= */
2622 if (strv_find(tags, "STOPPING=1")) {
2624 log_debug_unit(u->id, "%s: got STOPPING=1", u->id);
2625 s->notify_state = NOTIFY_STOPPING;
2627 if (s->state == SERVICE_RUNNING)
2628 service_enter_stop_by_notify(s);
2633 /* Interpret STATUS= */
2634 e = strv_find_startswith(tags, "STATUS=");
2636 _cleanup_free_ char *t = NULL;
2639 if (!utf8_is_valid(e))
2640 log_warning_unit(u->id, "Status message in notification is not UTF-8 clean.");
2642 log_debug_unit(u->id, "%s: got STATUS=%s", u->id, e);
2650 if (!streq_ptr(s->status_text, t)) {
2652 free(s->status_text);
2660 /* Interpret ERRNO= */
2661 e = strv_find_startswith(tags, "ERRNO=");
2665 if (safe_atoi(e, &status_errno) < 0 || status_errno < 0)
2666 log_warning_unit(u->id, "Failed to parse ERRNO= field in notification message: %s", e);
2668 log_debug_unit(u->id, "%s: got ERRNO=%s", u->id, e);
2670 if (s->status_errno != status_errno) {
2671 s->status_errno = status_errno;
2677 /* Interpret WATCHDOG= */
2678 if (strv_find(tags, "WATCHDOG=1")) {
2679 log_debug_unit(u->id, "%s: got WATCHDOG=1", u->id);
2680 service_reset_watchdog(s);
2683 /* Notify clients about changed status or main pid */
2685 unit_add_to_dbus_queue(u);
2688 static int service_get_timeout(Unit *u, uint64_t *timeout) {
2689 Service *s = SERVICE(u);
2692 if (!s->timer_event_source)
2695 r = sd_event_source_get_time(s->timer_event_source, timeout);
2702 static void service_bus_name_owner_change(
2705 const char *old_owner,
2706 const char *new_owner) {
2708 Service *s = SERVICE(u);
2714 assert(streq(s->bus_name, name));
2715 assert(old_owner || new_owner);
2717 if (old_owner && new_owner)
2718 log_debug_unit(u->id, "%s's D-Bus name %s changed owner from %s to %s", u->id, name, old_owner, new_owner);
2720 log_debug_unit(u->id, "%s's D-Bus name %s no longer registered by %s", u->id, name, old_owner);
2722 log_debug_unit(u->id, "%s's D-Bus name %s now registered by %s", u->id, name, new_owner);
2724 s->bus_name_good = !!new_owner;
2726 if (s->type == SERVICE_DBUS) {
2728 /* service_enter_running() will figure out what to
2730 if (s->state == SERVICE_RUNNING)
2731 service_enter_running(s, SERVICE_SUCCESS);
2732 else if (s->state == SERVICE_START && new_owner)
2733 service_enter_start_post(s);
2735 } else if (new_owner &&
2737 (s->state == SERVICE_START ||
2738 s->state == SERVICE_START_POST ||
2739 s->state == SERVICE_RUNNING ||
2740 s->state == SERVICE_RELOAD)) {
2742 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
2745 /* Try to acquire PID from bus service */
2747 r = sd_bus_get_name_creds(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
2749 r = sd_bus_creds_get_pid(creds, &pid);
2751 log_debug_unit(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
2753 service_set_main_pid(s, pid);
2754 unit_watch_pid(UNIT(s), pid);
2759 int service_set_socket_fd(Service *s, int fd, Socket *sock, bool selinux_context_net) {
2760 _cleanup_free_ char *peer = NULL;
2766 /* This is called by the socket code when instantiating a new
2767 * service for a stream socket and the socket needs to be
2770 if (UNIT(s)->load_state != UNIT_LOADED)
2773 if (s->socket_fd >= 0)
2776 if (s->state != SERVICE_DEAD)
2779 if (getpeername_pretty(fd, &peer) >= 0) {
2781 if (UNIT(s)->description) {
2782 _cleanup_free_ char *a;
2784 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
2788 r = unit_set_description(UNIT(s), a);
2790 r = unit_set_description(UNIT(s), peer);
2797 s->socket_fd_selinux_context_net = selinux_context_net;
2799 unit_ref_set(&s->accept_socket, UNIT(sock));
2801 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
2804 static void service_reset_failed(Unit *u) {
2805 Service *s = SERVICE(u);
2809 if (s->state == SERVICE_FAILED)
2810 service_set_state(s, SERVICE_DEAD);
2812 s->result = SERVICE_SUCCESS;
2813 s->reload_result = SERVICE_SUCCESS;
2815 RATELIMIT_RESET(s->start_limit);
2818 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
2819 Service *s = SERVICE(u);
2821 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
2824 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2825 [SERVICE_DEAD] = "dead",
2826 [SERVICE_START_PRE] = "start-pre",
2827 [SERVICE_START] = "start",
2828 [SERVICE_START_POST] = "start-post",
2829 [SERVICE_RUNNING] = "running",
2830 [SERVICE_EXITED] = "exited",
2831 [SERVICE_RELOAD] = "reload",
2832 [SERVICE_STOP] = "stop",
2833 [SERVICE_STOP_SIGABRT] = "stop-sigabrt",
2834 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2835 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2836 [SERVICE_STOP_POST] = "stop-post",
2837 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2838 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2839 [SERVICE_FAILED] = "failed",
2840 [SERVICE_AUTO_RESTART] = "auto-restart",
2843 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2845 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2846 [SERVICE_RESTART_NO] = "no",
2847 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
2848 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
2849 [SERVICE_RESTART_ON_ABNORMAL] = "on-abnormal",
2850 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
2851 [SERVICE_RESTART_ON_ABORT] = "on-abort",
2852 [SERVICE_RESTART_ALWAYS] = "always",
2855 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2857 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2858 [SERVICE_SIMPLE] = "simple",
2859 [SERVICE_FORKING] = "forking",
2860 [SERVICE_ONESHOT] = "oneshot",
2861 [SERVICE_DBUS] = "dbus",
2862 [SERVICE_NOTIFY] = "notify",
2863 [SERVICE_IDLE] = "idle"
2866 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2868 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2869 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2870 [SERVICE_EXEC_START] = "ExecStart",
2871 [SERVICE_EXEC_START_POST] = "ExecStartPost",
2872 [SERVICE_EXEC_RELOAD] = "ExecReload",
2873 [SERVICE_EXEC_STOP] = "ExecStop",
2874 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2877 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2879 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
2880 [NOTIFY_NONE] = "none",
2881 [NOTIFY_MAIN] = "main",
2882 [NOTIFY_ALL] = "all"
2885 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
2887 static const char* const notify_state_table[_NOTIFY_STATE_MAX] = {
2888 [NOTIFY_UNKNOWN] = "unknown",
2889 [NOTIFY_READY] = "ready",
2890 [NOTIFY_RELOADING] = "reloading",
2891 [NOTIFY_STOPPING] = "stopping",
2894 DEFINE_STRING_TABLE_LOOKUP(notify_state, NotifyState);
2896 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
2897 [SERVICE_SUCCESS] = "success",
2898 [SERVICE_FAILURE_RESOURCES] = "resources",
2899 [SERVICE_FAILURE_TIMEOUT] = "timeout",
2900 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
2901 [SERVICE_FAILURE_SIGNAL] = "signal",
2902 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
2903 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
2904 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
2907 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
2909 const UnitVTable service_vtable = {
2910 .object_size = sizeof(Service),
2911 .exec_context_offset = offsetof(Service, exec_context),
2912 .cgroup_context_offset = offsetof(Service, cgroup_context),
2913 .kill_context_offset = offsetof(Service, kill_context),
2914 .exec_runtime_offset = offsetof(Service, exec_runtime),
2920 .private_section = "Service",
2922 .init = service_init,
2923 .done = service_done,
2924 .load = service_load,
2926 .coldplug = service_coldplug,
2928 .dump = service_dump,
2930 .start = service_start,
2931 .stop = service_stop,
2932 .reload = service_reload,
2934 .can_reload = service_can_reload,
2936 .kill = service_kill,
2938 .serialize = service_serialize,
2939 .deserialize_item = service_deserialize_item,
2941 .active_state = service_active_state,
2942 .sub_state_to_string = service_sub_state_to_string,
2944 .check_gc = service_check_gc,
2945 .check_snapshot = service_check_snapshot,
2947 .sigchld_event = service_sigchld_event,
2949 .reset_failed = service_reset_failed,
2951 .notify_cgroup_empty = service_notify_cgroup_empty_event,
2952 .notify_message = service_notify_message,
2954 .bus_name_owner_change = service_bus_name_owner_change,
2956 .bus_interface = "org.freedesktop.systemd1.Service",
2957 .bus_vtable = bus_service_vtable,
2958 .bus_set_property = bus_service_set_property,
2959 .bus_commit_properties = bus_service_commit_properties,
2961 .get_timeout = service_get_timeout,
2962 .can_transient = true,
2964 .status_message_formats = {
2965 .starting_stopping = {
2966 [0] = "Starting %s...",
2967 [1] = "Stopping %s...",
2969 .finished_start_job = {
2970 [JOB_DONE] = "Started %s.",
2971 [JOB_FAILED] = "Failed to start %s.",
2972 [JOB_DEPENDENCY] = "Dependency failed for %s.",
2973 [JOB_TIMEOUT] = "Timed out starting %s.",
2975 .finished_stop_job = {
2976 [JOB_DONE] = "Stopped %s.",
2977 [JOB_FAILED] = "Stopped (with error) %s.",
2978 [JOB_TIMEOUT] = "Timed out stopping %s.",