1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
9 #include "sd-messages.h"
11 #include "alloc-util.h"
13 #include "bus-error.h"
14 #include "bus-kernel.h"
17 #include "constants.h"
18 #include "dbus-service.h"
19 #include "dbus-unit.h"
20 #include "devnum-util.h"
23 #include "exit-status.h"
26 #include "format-util.h"
27 #include "load-dropin.h"
28 #include "load-fragment.h"
31 #include "open-file.h"
32 #include "parse-util.h"
33 #include "path-util.h"
34 #include "process-util.h"
35 #include "random-util.h"
36 #include "serialize.h"
38 #include "signal-util.h"
40 #include "stdio-util.h"
41 #include "string-table.h"
42 #include "string-util.h"
44 #include "unit-name.h"
48 #define service_spawn(...) service_spawn_internal(__func__, __VA_ARGS__)
50 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
51 [SERVICE_DEAD
] = UNIT_INACTIVE
,
52 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
53 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
54 [SERVICE_START
] = UNIT_ACTIVATING
,
55 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
56 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
57 [SERVICE_EXITED
] = UNIT_ACTIVE
,
58 [SERVICE_RELOAD
] = UNIT_RELOADING
,
59 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
60 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
61 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
62 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
63 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
64 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
65 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
66 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
67 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
68 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
69 [SERVICE_FAILED
] = UNIT_FAILED
,
70 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
71 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
72 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
73 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
74 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
77 /* For Type=idle we never want to delay any other jobs, hence we
78 * consider idle jobs active as soon as we start working on them */
79 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
80 [SERVICE_DEAD
] = UNIT_INACTIVE
,
81 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
82 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
83 [SERVICE_START
] = UNIT_ACTIVE
,
84 [SERVICE_START_POST
] = UNIT_ACTIVE
,
85 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
86 [SERVICE_EXITED
] = UNIT_ACTIVE
,
87 [SERVICE_RELOAD
] = UNIT_RELOADING
,
88 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
89 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
90 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
91 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
92 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
93 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
94 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
95 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
96 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
97 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
98 [SERVICE_FAILED
] = UNIT_FAILED
,
99 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
100 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
101 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
102 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
103 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
106 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
107 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
108 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
109 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
111 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
112 static void service_enter_reload_by_notify(Service
*s
);
114 static void service_init(Unit
*u
) {
115 Service
*s
= SERVICE(u
);
118 assert(u
->load_state
== UNIT_STUB
);
120 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
121 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
122 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
123 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
124 s
->restart_usec
= u
->manager
->default_restart_usec
;
125 s
->restart_usec_max
= USEC_INFINITY
;
126 s
->runtime_max_usec
= USEC_INFINITY
;
127 s
->type
= _SERVICE_TYPE_INVALID
;
128 s
->socket_fd
= -EBADF
;
129 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -EBADF
;
130 s
->guess_main_pid
= true;
132 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
134 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
135 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
137 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
139 s
->watchdog_original_usec
= USEC_INFINITY
;
141 s
->oom_policy
= _OOM_POLICY_INVALID
;
142 s
->reload_begin_usec
= USEC_INFINITY
;
143 s
->reload_signal
= SIGHUP
;
145 s
->fd_store_preserve_mode
= EXEC_PRESERVE_RESTART
;
148 static void service_unwatch_control_pid(Service
*s
) {
151 if (s
->control_pid
<= 0)
154 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->control_pid
));
157 static void service_unwatch_main_pid(Service
*s
) {
160 if (s
->main_pid
<= 0)
163 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->main_pid
));
166 static void service_unwatch_pid_file(Service
*s
) {
167 if (!s
->pid_file_pathspec
)
170 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
171 path_spec_unwatch(s
->pid_file_pathspec
);
172 path_spec_done(s
->pid_file_pathspec
);
173 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
176 static int service_set_main_pid(Service
*s
, pid_t pid
) {
182 if (pid
== getpid_cached())
185 if (s
->main_pid
== pid
&& s
->main_pid_known
)
188 if (s
->main_pid
!= pid
) {
189 service_unwatch_main_pid(s
);
190 exec_status_start(&s
->main_exec_status
, pid
);
194 s
->main_pid_known
= true;
195 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
197 if (s
->main_pid_alien
)
198 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
203 void service_release_socket_fd(Service
*s
) {
206 if (s
->socket_fd
< 0 && !UNIT_ISSET(s
->accept_socket
) && !s
->socket_peer
)
209 log_unit_debug(UNIT(s
), "Closing connection socket.");
211 /* Undo the effect of service_set_socket_fd(). */
213 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
215 if (UNIT_ISSET(s
->accept_socket
)) {
216 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
217 unit_ref_unset(&s
->accept_socket
);
220 s
->socket_peer
= socket_peer_unref(s
->socket_peer
);
223 static void service_override_notify_access(Service
*s
, NotifyAccess notify_access_override
) {
226 s
->notify_access_override
= notify_access_override
;
228 log_unit_debug(UNIT(s
), "notify_access=%s", notify_access_to_string(s
->notify_access
));
229 log_unit_debug(UNIT(s
), "notify_access_override=%s", notify_access_to_string(s
->notify_access_override
));
232 static void service_stop_watchdog(Service
*s
) {
235 s
->watchdog_event_source
= sd_event_source_disable_unref(s
->watchdog_event_source
);
236 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
239 static void service_start_watchdog(Service
*s
) {
240 usec_t watchdog_usec
;
245 watchdog_usec
= service_get_watchdog_usec(s
);
246 if (!timestamp_is_set(watchdog_usec
)) {
247 service_stop_watchdog(s
);
251 if (s
->watchdog_event_source
) {
252 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
254 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
258 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
260 r
= sd_event_add_time(
261 UNIT(s
)->manager
->event
,
262 &s
->watchdog_event_source
,
264 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
265 service_dispatch_watchdog
, s
);
267 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
271 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
273 /* Let's process everything else which might be a sign
274 * of living before we consider a service died. */
275 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
278 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
281 usec_t
service_restart_usec_next(Service
*s
) {
282 unsigned n_restarts_next
;
287 /* When the service state is in SERVICE_*_BEFORE_AUTO_RESTART or SERVICE_AUTO_RESTART,
288 * we still need to add 1 to s->n_restarts manually because s->n_restarts is not updated
289 * until a restart job is enqueued. Note that for SERVICE_AUTO_RESTART, that might have been
290 * the case, i.e. s->n_restarts is already increased. But we assume it's not since the time
291 * between job enqueuing and running is usually neglectable compared to the time we'll be sleeping. */
292 n_restarts_next
= s
->n_restarts
+ 1;
294 if (n_restarts_next
<= 1 ||
295 s
->restart_steps
== 0 ||
296 s
->restart_usec_max
== USEC_INFINITY
||
297 s
->restart_usec
>= s
->restart_usec_max
)
298 value
= s
->restart_usec
;
299 else if (n_restarts_next
> s
->restart_steps
)
300 value
= s
->restart_usec_max
;
302 /* Enforced in service_verify() and above */
303 assert(s
->restart_usec_max
> s
->restart_usec
);
305 /* ((restart_usec_max - restart_usec)^(1/restart_steps))^(n_restart_next - 1) */
306 value
= usec_add(s
->restart_usec
,
307 (usec_t
) powl(s
->restart_usec_max
- s
->restart_usec
,
308 (long double) (n_restarts_next
- 1) / s
->restart_steps
));
311 log_unit_debug(UNIT(s
), "Next restart interval calculated as: %s", FORMAT_TIMESPAN(value
, 0));
315 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
321 /* Extends the specified event source timer to at least the specified time, unless it is already later
327 r
= sd_event_source_get_time(source
, ¤t
);
330 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
331 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
335 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
338 r
= sd_event_source_set_time(source
, extended
);
341 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
342 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for event source '%s', ignoring %m", strna(desc
));
346 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
351 if (!timestamp_is_set(extend_timeout_usec
))
354 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
356 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
357 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
360 static void service_reset_watchdog(Service
*s
) {
363 dual_timestamp_get(&s
->watchdog_timestamp
);
364 service_start_watchdog(s
);
367 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
370 s
->watchdog_override_enable
= true;
371 s
->watchdog_override_usec
= watchdog_override_usec
;
372 service_reset_watchdog(s
);
374 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
375 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
378 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
384 assert(fs
->service
->n_fd_store
> 0);
385 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
386 fs
->service
->n_fd_store
--;
389 sd_event_source_disable_unref(fs
->event_source
);
392 asynchronous_close(fs
->fd
);
396 static void service_release_fd_store(Service
*s
) {
402 log_unit_debug(UNIT(s
), "Releasing all stored fds");
405 service_fd_store_unlink(s
->fd_store
);
407 assert(s
->n_fd_store
== 0);
410 static void service_release_stdio_fd(Service
*s
) {
413 if (s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stdout_fd
< 0)
416 log_unit_debug(UNIT(s
), "Releasing stdin/stdout/stderr file descriptors.");
418 s
->stdin_fd
= asynchronous_close(s
->stdin_fd
);
419 s
->stdout_fd
= asynchronous_close(s
->stdout_fd
);
420 s
->stderr_fd
= asynchronous_close(s
->stderr_fd
);
422 static void service_done(Unit
*u
) {
423 Service
*s
= SERVICE(u
);
427 open_file_free_many(&s
->open_files
);
429 s
->pid_file
= mfree(s
->pid_file
);
430 s
->status_text
= mfree(s
->status_text
);
432 s
->exec_runtime
= exec_runtime_free(s
->exec_runtime
);
433 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
434 s
->control_command
= NULL
;
435 s
->main_command
= NULL
;
437 exit_status_set_free(&s
->restart_prevent_status
);
438 exit_status_set_free(&s
->restart_force_status
);
439 exit_status_set_free(&s
->success_status
);
441 /* This will leak a process, but at least no memory or any of
443 service_unwatch_main_pid(s
);
444 service_unwatch_control_pid(s
);
445 service_unwatch_pid_file(s
);
448 unit_unwatch_bus_name(u
, s
->bus_name
);
449 s
->bus_name
= mfree(s
->bus_name
);
452 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
454 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
455 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
457 service_stop_watchdog(s
);
459 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
460 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
462 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
464 service_release_socket_fd(s
);
465 service_release_stdio_fd(s
);
466 service_release_fd_store(s
);
469 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
470 ServiceFDStore
*fs
= ASSERT_PTR(userdata
);
474 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
475 log_unit_debug(UNIT(fs
->service
),
476 "Received %s on stored fd %d (%s), closing.",
477 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
478 fs
->fd
, strna(fs
->fdname
));
479 service_fd_store_unlink(fs
);
483 static int service_add_fd_store(Service
*s
, int fd
, const char *name
, bool do_poll
) {
488 /* fd is always consumed if we return >= 0 */
493 if (fstat(fd
, &st
) < 0)
496 log_unit_debug(UNIT(s
), "Trying to stash fd for dev=" DEVNUM_FORMAT_STR
"/inode=%" PRIu64
, DEVNUM_FORMAT_VAL(st
.st_dev
), (uint64_t) st
.st_ino
);
498 if (s
->n_fd_store
>= s
->n_fd_store_max
)
499 /* Our store is full. Use this errno rather than E[NM]FILE to distinguish from the case
500 * where systemd itself hits the file limit. */
501 return log_unit_debug_errno(UNIT(s
), SYNTHETIC_ERRNO(EXFULL
), "Hit fd store limit.");
503 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
504 r
= same_fd(i
->fd
, fd
);
508 log_unit_debug(UNIT(s
), "Suppressing duplicate fd in fd store.");
509 asynchronous_close(fd
);
510 return 0; /* fd already included */
514 fs
= new(ServiceFDStore
, 1);
518 *fs
= (ServiceFDStore
) {
522 .fdname
= strdup(name
?: "stored"),
531 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
532 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
537 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
540 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
543 return 1; /* fd newly stored */
546 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
551 while (fdset_size(fds
) > 0) {
552 _cleanup_(asynchronous_closep
) int fd
= -EBADF
;
554 fd
= fdset_steal_first(fds
);
558 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
560 return log_unit_warning_errno(UNIT(s
), r
,
561 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
564 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
566 log_unit_debug(UNIT(s
), "Added fd %i (%s) to fd store.", fd
, strna(name
));
574 static void service_remove_fd_store(Service
*s
, const char *name
) {
578 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
579 if (!streq(fs
->fdname
, name
))
582 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
583 service_fd_store_unlink(fs
);
587 static usec_t
service_running_timeout(Service
*s
) {
592 if (s
->runtime_rand_extra_usec
!= 0) {
593 delta
= random_u64_range(s
->runtime_rand_extra_usec
);
594 log_unit_debug(UNIT(s
), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta
, USEC_PER_SEC
));
597 return usec_add(usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
,
598 s
->runtime_max_usec
),
602 static int service_arm_timer(Service
*s
, bool relative
, usec_t usec
) {
607 if (s
->timer_event_source
) {
608 r
= (relative
? sd_event_source_set_time_relative
: sd_event_source_set_time
)(s
->timer_event_source
, usec
);
612 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
615 if (usec
== USEC_INFINITY
)
618 r
= (relative
? sd_event_add_time_relative
: sd_event_add_time
)(
619 UNIT(s
)->manager
->event
,
620 &s
->timer_event_source
,
623 service_dispatch_timer
, s
);
627 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
632 static int service_verify(Service
*s
) {
634 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
636 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++)
637 LIST_FOREACH(command
, command
, s
->exec_command
[c
]) {
638 if (!path_is_absolute(command
->path
) && !filename_is_valid(command
->path
))
639 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
640 "Service %s= binary path \"%s\" is neither a valid executable name nor an absolute path. Refusing.",
642 service_exec_command_to_string(c
));
643 if (strv_isempty(command
->argv
))
644 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
645 "Service has an empty argv in %s=. Refusing.",
646 service_exec_command_to_string(c
));
649 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
] &&
650 UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
651 /* FailureAction= only makes sense if one of the start or stop commands is specified.
652 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
653 * either a command or SuccessAction= are required. */
655 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
657 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
])
658 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
660 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
661 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
663 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
)
664 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
666 if (s
->type
== SERVICE_ONESHOT
&&
667 !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
))
668 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has Restart= set to either always or on-success, which isn't allowed for Type=oneshot services. Refusing.");
670 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
))
671 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has RestartForceExitStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
673 if (s
->type
== SERVICE_ONESHOT
&& s
->exit_type
== SERVICE_EXIT_CGROUP
)
674 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has ExitType=cgroup set, which isn't allowed for Type=oneshot services. Refusing.");
676 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
)
677 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
679 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
))
680 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
682 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
683 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
685 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
686 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
688 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
689 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
691 if (s
->runtime_max_usec
== USEC_INFINITY
&& s
->runtime_rand_extra_usec
!= 0)
692 log_unit_warning(UNIT(s
), "Service has RuntimeRandomizedExtraSec= setting, but no RuntimeMaxSec=. Ignoring.");
694 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& cg_unified() < CGROUP_UNIFIED_SYSTEMD
)
695 log_unit_warning(UNIT(s
), "Service has ExitType=cgroup set, but we are running with legacy cgroups v1, which might not work correctly. Continuing.");
697 if (s
->restart_usec_max
== USEC_INFINITY
&& s
->restart_steps
> 0)
698 log_unit_warning(UNIT(s
), "Service has RestartSteps= but no RestartSecMax= setting. Ignoring.");
700 if (s
->restart_usec_max
!= USEC_INFINITY
&& s
->restart_steps
== 0)
701 log_unit_warning(UNIT(s
), "Service has RestartSecMax= but no RestartSteps= setting. Ignoring.");
703 if (s
->restart_usec_max
< s
->restart_usec
) {
704 log_unit_warning(UNIT(s
), "RestartSecMax= has a value smaller than RestartSec=, resetting RestartSec= to RestartSecMax=.");
705 s
->restart_usec
= s
->restart_usec_max
;
711 static int service_add_default_dependencies(Service
*s
) {
716 if (!UNIT(s
)->default_dependencies
)
719 /* Add a number of automatic dependencies useful for the
720 * majority of services. */
722 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
723 /* First, pull in the really early boot stuff, and
724 * require it, so that we fail if we can't acquire
727 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
732 /* In the --user instance there's no sysinit.target,
733 * in that case require basic.target instead. */
735 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
740 /* Second, if the rest of the base system is in the same
741 * transaction, order us after it, but do not pull it in or
742 * even require it. */
743 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
747 /* Third, add us in for normal shutdown. */
748 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
751 static void service_fix_stdio(Service
*s
) {
754 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
755 * default value that is subject to automatic overriding triggered by other settings and an explicit
756 * choice the user can make. We don't distinguish between these cases currently. */
758 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
759 s
->exec_context
.stdin_data_size
> 0)
760 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
762 if (IN_SET(s
->exec_context
.std_input
,
764 EXEC_INPUT_TTY_FORCE
,
767 EXEC_INPUT_NAMED_FD
))
770 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
771 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
772 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
773 * duplicated for both input and output at the same time (since they then would cause a feedback
774 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
776 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
777 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
778 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
780 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
781 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
784 static int service_setup_bus_name(Service
*s
) {
789 /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */
793 if (s
->type
== SERVICE_DBUS
) {
794 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
796 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
798 /* We always want to be ordered against dbus.socket if both are in the transaction. */
799 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
801 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
804 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
806 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
808 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
813 static int service_add_extras(Service
*s
) {
818 if (s
->type
== _SERVICE_TYPE_INVALID
) {
819 /* Figure out a type automatically */
821 s
->type
= SERVICE_DBUS
;
822 else if (s
->exec_command
[SERVICE_EXEC_START
])
823 s
->type
= SERVICE_SIMPLE
;
825 s
->type
= SERVICE_ONESHOT
;
828 /* Oneshot services have disabled start timeout by default */
829 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
830 s
->timeout_start_usec
= USEC_INFINITY
;
832 service_fix_stdio(s
);
834 r
= unit_patch_contexts(UNIT(s
));
838 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
842 r
= unit_set_default_slice(UNIT(s
));
846 /* If the service needs the notify socket, let's enable it automatically. */
847 if (s
->notify_access
== NOTIFY_NONE
&&
848 (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) || s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
849 s
->notify_access
= NOTIFY_MAIN
;
851 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
852 * delegation is on, in that case it we assume the payload knows better what to do and can process
853 * things in a more focused way. */
854 if (s
->oom_policy
< 0)
855 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
857 /* Let the kernel do the killing if that's requested. */
858 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
860 r
= service_add_default_dependencies(s
);
864 r
= service_setup_bus_name(s
);
871 static int service_load(Unit
*u
) {
872 Service
*s
= SERVICE(u
);
875 r
= unit_load_fragment_and_dropin(u
, true);
879 if (u
->load_state
!= UNIT_LOADED
)
882 /* This is a new unit? Then let's add in some extras */
883 r
= service_add_extras(s
);
887 return service_verify(s
);
890 static void service_dump_fdstore(Service
*s
, FILE *f
, const char *prefix
) {
895 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
896 _cleanup_free_
char *path
= NULL
;
900 if (fstat(i
->fd
, &st
) < 0) {
901 log_debug_errno(errno
, "Failed to stat fdstore entry: %m");
905 flags
= fcntl(i
->fd
, F_GETFL
);
907 log_debug_errno(errno
, "Failed to get fdstore entry flags: %m");
911 (void) fd_get_path(i
->fd
, &path
);
914 "%s%s '%s' (type=%s; dev=" DEVNUM_FORMAT_STR
"; inode=%" PRIu64
"; rdev=" DEVNUM_FORMAT_STR
"; path=%s; access=%s)\n",
915 prefix
, i
== s
->fd_store
? "File Descriptor Store Entry:" : " ",
917 inode_type_to_string(st
.st_mode
),
918 DEVNUM_FORMAT_VAL(st
.st_dev
),
919 (uint64_t) st
.st_ino
,
920 DEVNUM_FORMAT_VAL(st
.st_rdev
),
922 accmode_to_string(flags
));
926 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
927 Service
*s
= SERVICE(u
);
932 prefix
= strempty(prefix
);
933 prefix2
= strjoina(prefix
, "\t");
936 "%sService State: %s\n"
938 "%sReload Result: %s\n"
939 "%sClean Result: %s\n"
940 "%sPermissionsStartOnly: %s\n"
941 "%sRootDirectoryStartOnly: %s\n"
942 "%sRemainAfterExit: %s\n"
943 "%sGuessMainPID: %s\n"
946 "%sNotifyAccess: %s\n"
947 "%sNotifyState: %s\n"
949 "%sReloadSignal: %s\n",
950 prefix
, service_state_to_string(s
->state
),
951 prefix
, service_result_to_string(s
->result
),
952 prefix
, service_result_to_string(s
->reload_result
),
953 prefix
, service_result_to_string(s
->clean_result
),
954 prefix
, yes_no(s
->permissions_start_only
),
955 prefix
, yes_no(s
->root_directory_start_only
),
956 prefix
, yes_no(s
->remain_after_exit
),
957 prefix
, yes_no(s
->guess_main_pid
),
958 prefix
, service_type_to_string(s
->type
),
959 prefix
, service_restart_to_string(s
->restart
),
960 prefix
, notify_access_to_string(service_get_notify_access(s
)),
961 prefix
, notify_state_to_string(s
->notify_state
),
962 prefix
, oom_policy_to_string(s
->oom_policy
),
963 prefix
, signal_to_string(s
->reload_signal
));
965 if (s
->control_pid
> 0)
967 "%sControl PID: "PID_FMT
"\n",
968 prefix
, s
->control_pid
);
972 "%sMain PID: "PID_FMT
"\n"
973 "%sMain PID Known: %s\n"
974 "%sMain PID Alien: %s\n",
976 prefix
, yes_no(s
->main_pid_known
),
977 prefix
, yes_no(s
->main_pid_alien
));
982 prefix
, s
->pid_file
);
987 "%sBus Name Good: %s\n",
989 prefix
, yes_no(s
->bus_name_good
));
991 if (UNIT_ISSET(s
->accept_socket
))
993 "%sAccept Socket: %s\n",
994 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
998 "%sRestartSteps: %u\n"
999 "%sRestartSecMax: %s\n"
1000 "%sTimeoutStartSec: %s\n"
1001 "%sTimeoutStopSec: %s\n"
1002 "%sTimeoutStartFailureMode: %s\n"
1003 "%sTimeoutStopFailureMode: %s\n",
1004 prefix
, FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
),
1005 prefix
, s
->restart_steps
,
1006 prefix
, FORMAT_TIMESPAN(s
->restart_usec_max
, USEC_PER_SEC
),
1007 prefix
, FORMAT_TIMESPAN(s
->timeout_start_usec
, USEC_PER_SEC
),
1008 prefix
, FORMAT_TIMESPAN(s
->timeout_stop_usec
, USEC_PER_SEC
),
1009 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
1010 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
1012 if (s
->timeout_abort_set
)
1014 "%sTimeoutAbortSec: %s\n",
1015 prefix
, FORMAT_TIMESPAN(s
->timeout_abort_usec
, USEC_PER_SEC
));
1018 "%sRuntimeMaxSec: %s\n"
1019 "%sRuntimeRandomizedExtraSec: %s\n"
1020 "%sWatchdogSec: %s\n",
1021 prefix
, FORMAT_TIMESPAN(s
->runtime_max_usec
, USEC_PER_SEC
),
1022 prefix
, FORMAT_TIMESPAN(s
->runtime_rand_extra_usec
, USEC_PER_SEC
),
1023 prefix
, FORMAT_TIMESPAN(s
->watchdog_usec
, USEC_PER_SEC
));
1025 kill_context_dump(&s
->kill_context
, f
, prefix
);
1026 exec_context_dump(&s
->exec_context
, f
, prefix
);
1028 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
1029 if (!s
->exec_command
[c
])
1032 fprintf(f
, "%s-> %s:\n",
1033 prefix
, service_exec_command_to_string(c
));
1035 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
1039 fprintf(f
, "%sStatus Text: %s\n",
1040 prefix
, s
->status_text
);
1042 if (s
->n_fd_store_max
> 0)
1044 "%sFile Descriptor Store Max: %u\n"
1045 "%sFile Descriptor Store Pin: %s\n"
1046 "%sFile Descriptor Store Current: %zu\n",
1047 prefix
, s
->n_fd_store_max
,
1048 prefix
, exec_preserve_mode_to_string(s
->fd_store_preserve_mode
),
1049 prefix
, s
->n_fd_store
);
1051 service_dump_fdstore(s
, f
, prefix
);
1054 LIST_FOREACH(open_files
, of
, s
->open_files
) {
1055 _cleanup_free_
char *ofs
= NULL
;
1058 r
= open_file_to_string(of
, &ofs
);
1061 "Failed to convert OpenFile= setting to string, ignoring: %m");
1065 fprintf(f
, "%sOpen File: %s\n", prefix
, ofs
);
1068 cgroup_context_dump(UNIT(s
), f
, prefix
);
1071 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
1075 assert(pid_is_valid(pid
));
1077 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
1078 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
1081 if (pid
== getpid_cached() || pid
== 1)
1082 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
1084 if (pid
== s
->control_pid
)
1085 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
1087 if (!pid_is_alive(pid
))
1088 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
1090 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
1091 if (owner
== UNIT(s
)) {
1092 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
1093 return 1; /* Yay, it's definitely a good PID */
1096 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
1099 static int service_load_pid_file(Service
*s
, bool may_warn
) {
1100 bool questionable_pid_file
= false;
1101 _cleanup_free_
char *k
= NULL
;
1102 _cleanup_close_
int fd
= -EBADF
;
1111 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
1113 r
= chase(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
1114 if (r
== -ENOLINK
) {
1115 log_unit_debug_errno(UNIT(s
), r
,
1116 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
1118 questionable_pid_file
= true;
1120 r
= chase(s
->pid_file
, NULL
, 0, NULL
, &fd
);
1123 return log_unit_full_errno(UNIT(s
), prio
, fd
,
1124 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
1126 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
1127 * chase() returned us into a proper fd first. */
1128 r
= read_one_line_file(FORMAT_PROC_FD_PATH(fd
), &k
);
1130 return log_unit_error_errno(UNIT(s
), r
,
1131 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
1134 r
= parse_pid(k
, &pid
);
1136 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
1138 if (s
->main_pid_known
&& pid
== s
->main_pid
)
1141 r
= service_is_suitable_main_pid(s
, pid
, prio
);
1147 if (questionable_pid_file
)
1148 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1149 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1151 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1153 if (fstat(fd
, &st
) < 0)
1154 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1157 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1158 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
1160 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" does not belong to service, but we'll accept it since PID file is owned by root.", pid
);
1163 if (s
->main_pid_known
) {
1164 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1166 service_unwatch_main_pid(s
);
1167 s
->main_pid_known
= false;
1169 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1171 r
= service_set_main_pid(s
, pid
);
1175 r
= unit_watch_pid(UNIT(s
), pid
, false);
1176 if (r
< 0) /* FIXME: we need to do something here */
1177 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1182 static void service_search_main_pid(Service
*s
) {
1188 /* If we know it anyway, don't ever fall back to unreliable
1190 if (s
->main_pid_known
)
1193 if (!s
->guess_main_pid
)
1196 assert(s
->main_pid
<= 0);
1198 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1201 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1202 if (service_set_main_pid(s
, pid
) < 0)
1205 r
= unit_watch_pid(UNIT(s
), pid
, false);
1207 /* FIXME: we need to do something here */
1208 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1211 static void service_set_state(Service
*s
, ServiceState state
) {
1212 ServiceState old_state
;
1213 const UnitActiveState
*table
;
1217 if (s
->state
!= state
)
1218 bus_unit_send_pending_change_signal(UNIT(s
), false);
1220 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1222 old_state
= s
->state
;
1225 service_unwatch_pid_file(s
);
1228 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1230 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1231 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1232 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1233 SERVICE_AUTO_RESTART
,
1235 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1238 SERVICE_START
, SERVICE_START_POST
,
1240 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1241 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1242 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1243 service_unwatch_main_pid(s
);
1244 s
->main_command
= NULL
;
1248 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1249 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1250 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1251 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1252 SERVICE_CLEANING
)) {
1253 service_unwatch_control_pid(s
);
1254 s
->control_command
= NULL
;
1255 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1259 SERVICE_DEAD
, SERVICE_FAILED
,
1260 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
,
1261 SERVICE_DEAD_RESOURCES_PINNED
)) {
1262 unit_unwatch_all_pids(UNIT(s
));
1263 unit_dequeue_rewatch_pids(UNIT(s
));
1266 if (state
!= SERVICE_START
)
1267 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
1269 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1270 service_stop_watchdog(s
);
1272 /* For the inactive states unit_notify() will trim the cgroup,
1273 * but for exit we have to do that ourselves... */
1274 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1275 unit_prune_cgroup(UNIT(s
));
1277 if (old_state
!= state
)
1278 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1280 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1281 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1282 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1285 static usec_t
service_coldplug_timeout(Service
*s
) {
1288 switch (s
->deserialized_state
) {
1290 case SERVICE_CONDITION
:
1291 case SERVICE_START_PRE
:
1293 case SERVICE_START_POST
:
1294 case SERVICE_RELOAD
:
1295 case SERVICE_RELOAD_SIGNAL
:
1296 case SERVICE_RELOAD_NOTIFY
:
1297 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1299 case SERVICE_RUNNING
:
1300 return service_running_timeout(s
);
1303 case SERVICE_STOP_SIGTERM
:
1304 case SERVICE_STOP_SIGKILL
:
1305 case SERVICE_STOP_POST
:
1306 case SERVICE_FINAL_SIGTERM
:
1307 case SERVICE_FINAL_SIGKILL
:
1308 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1310 case SERVICE_STOP_WATCHDOG
:
1311 case SERVICE_FINAL_WATCHDOG
:
1312 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1314 case SERVICE_AUTO_RESTART
:
1315 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, service_restart_usec_next(s
));
1317 case SERVICE_CLEANING
:
1318 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1321 return USEC_INFINITY
;
1325 static int service_coldplug(Unit
*u
) {
1326 Service
*s
= SERVICE(u
);
1330 assert(s
->state
== SERVICE_DEAD
);
1332 if (s
->deserialized_state
== s
->state
)
1335 r
= service_arm_timer(s
, /* relative= */ false, service_coldplug_timeout(s
));
1339 if (s
->main_pid
> 0 &&
1340 pid_is_unwaited(s
->main_pid
) &&
1341 (IN_SET(s
->deserialized_state
,
1342 SERVICE_START
, SERVICE_START_POST
,
1344 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1345 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1346 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1347 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1352 if (s
->control_pid
> 0 &&
1353 pid_is_unwaited(s
->control_pid
) &&
1354 IN_SET(s
->deserialized_state
,
1355 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1356 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1357 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1358 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1359 SERVICE_CLEANING
)) {
1360 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1365 if (!IN_SET(s
->deserialized_state
,
1366 SERVICE_DEAD
, SERVICE_FAILED
,
1367 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
,
1369 SERVICE_DEAD_RESOURCES_PINNED
)) {
1370 (void) unit_enqueue_rewatch_pids(u
);
1371 (void) unit_setup_exec_runtime(u
);
1374 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1375 service_start_watchdog(s
);
1377 if (UNIT_ISSET(s
->accept_socket
)) {
1378 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1380 if (socket
->max_connections_per_source
> 0) {
1383 /* Make a best-effort attempt at bumping the connection count */
1384 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1385 socket_peer_unref(s
->socket_peer
);
1386 s
->socket_peer
= peer
;
1391 service_set_state(s
, s
->deserialized_state
);
1395 static int service_collect_fds(
1399 size_t *n_socket_fds
,
1400 size_t *n_storage_fds
) {
1402 _cleanup_strv_free_
char **rfd_names
= NULL
;
1403 _cleanup_free_
int *rfds
= NULL
;
1404 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1410 assert(n_socket_fds
);
1411 assert(n_storage_fds
);
1413 if (s
->socket_fd
>= 0) {
1415 /* Pass the per-connection socket */
1417 rfds
= newdup(int, &s
->socket_fd
, 1);
1421 rfd_names
= strv_new("connection");
1429 /* Pass all our configured sockets for singleton services */
1431 UNIT_FOREACH_DEPENDENCY(u
, UNIT(s
), UNIT_ATOM_TRIGGERED_BY
) {
1432 _cleanup_free_
int *cfds
= NULL
;
1436 if (u
->type
!= UNIT_SOCKET
)
1441 cn_fds
= socket_collect_fds(sock
, &cfds
);
1449 rfds
= TAKE_PTR(cfds
);
1450 rn_socket_fds
= cn_fds
;
1454 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1458 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1461 rn_socket_fds
+= cn_fds
;
1464 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1470 if (s
->n_fd_store
> 0) {
1475 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1481 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1486 n_fds
= rn_socket_fds
;
1488 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1489 rfds
[n_fds
] = fs
->fd
;
1490 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1491 if (!rfd_names
[n_fds
])
1498 rfd_names
[n_fds
] = NULL
;
1501 *fds
= TAKE_PTR(rfds
);
1502 *fd_names
= TAKE_PTR(rfd_names
);
1503 *n_socket_fds
= rn_socket_fds
;
1504 *n_storage_fds
= rn_storage_fds
;
1509 static int service_allocate_exec_fd_event_source(
1512 sd_event_source
**ret_event_source
) {
1514 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1519 assert(ret_event_source
);
1521 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1523 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1525 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1527 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1529 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1531 (void) sd_event_source_set_description(source
, "service exec_fd");
1533 r
= sd_event_source_set_io_fd_own(source
, true);
1535 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1537 *ret_event_source
= TAKE_PTR(source
);
1541 static int service_allocate_exec_fd(
1543 sd_event_source
**ret_event_source
,
1546 _cleanup_close_pair_
int p
[] = PIPE_EBADF
;
1550 assert(ret_event_source
);
1551 assert(ret_exec_fd
);
1553 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1554 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1556 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1561 *ret_exec_fd
= TAKE_FD(p
[1]);
1566 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1569 /* Notifications are accepted depending on the process and
1570 * the access setting of the service:
1571 * process: \ access: NONE MAIN EXEC ALL
1572 * main no yes yes yes
1573 * control no no yes yes
1574 * other (forked) no no no yes */
1576 if (flags
& EXEC_IS_CONTROL
)
1577 /* A control process */
1578 return IN_SET(service_get_notify_access(s
), NOTIFY_EXEC
, NOTIFY_ALL
);
1580 /* We only spawn main processes and control processes, so any
1581 * process that is not a control process is a main process */
1582 return service_get_notify_access(s
) != NOTIFY_NONE
;
1585 static Service
*service_get_triggering_service(Service
*s
) {
1586 Unit
*candidate
= NULL
, *other
;
1590 /* Return the service which triggered service 's', this means dependency
1591 * types which include the UNIT_ATOM_ON_{FAILURE,SUCCESS}_OF atoms.
1593 * N.B. if there are multiple services which could trigger 's' via OnFailure=
1594 * or OnSuccess= then we return NULL. This is since we don't know from which
1595 * one to propagate the exit status. */
1597 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_FAILURE_OF
) {
1603 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_SUCCESS_OF
) {
1609 return SERVICE(candidate
);
1612 log_unit_warning(UNIT(s
), "multiple trigger source candidates for exit status propagation (%s, %s), skipping.",
1613 candidate
->id
, other
->id
);
1617 static int service_spawn_internal(
1625 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1628 .stdout_fd
= -EBADF
,
1629 .stderr_fd
= -EBADF
,
1632 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1633 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1643 log_unit_debug(UNIT(s
), "Will spawn child (%s): %s", caller
, c
->path
);
1645 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1649 assert(!s
->exec_fd_event_source
);
1651 if (flags
& EXEC_IS_CONTROL
) {
1652 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1653 if (s
->permissions_start_only
)
1654 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1655 if (s
->root_directory_start_only
)
1656 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1659 if ((flags
& EXEC_PASS_FDS
) ||
1660 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1661 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1662 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1664 r
= service_collect_fds(s
,
1666 &exec_params
.fd_names
,
1667 &exec_params
.n_socket_fds
,
1668 &exec_params
.n_storage_fds
);
1672 exec_params
.open_files
= s
->open_files
;
1674 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1677 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1678 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1683 r
= service_arm_timer(s
, /* relative= */ true, timeout
);
1687 our_env
= new0(char*, 13);
1691 if (service_exec_needs_notify_socket(s
, flags
)) {
1692 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1695 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1697 if (s
->n_fd_store_max
> 0)
1698 if (asprintf(our_env
+ n_env
++, "FDSTORE=%u", s
->n_fd_store_max
) < 0)
1702 if (s
->main_pid
> 0)
1703 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1706 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1707 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1711 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1714 if (s
->socket_fd
>= 0) {
1715 union sockaddr_union sa
;
1716 socklen_t salen
= sizeof(sa
);
1718 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1719 * useful. Note that we do this only when we are still connected at this point in time, which we might
1720 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1721 * in ENOTCONN), and just use whate we can use. */
1723 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1724 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1725 _cleanup_free_
char *addr
= NULL
;
1729 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1733 t
= strjoin("REMOTE_ADDR=", addr
);
1736 our_env
[n_env
++] = t
;
1738 r
= sockaddr_port(&sa
.sa
, &port
);
1742 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1744 our_env
[n_env
++] = t
;
1748 Service
*env_source
= NULL
;
1749 const char *monitor_prefix
;
1750 if (flags
& EXEC_SETENV_RESULT
) {
1752 monitor_prefix
= "";
1753 } else if (flags
& EXEC_SETENV_MONITOR_RESULT
) {
1754 env_source
= service_get_triggering_service(s
);
1755 monitor_prefix
= "MONITOR_";
1759 if (asprintf(our_env
+ n_env
++, "%sSERVICE_RESULT=%s", monitor_prefix
, service_result_to_string(env_source
->result
)) < 0)
1762 if (env_source
->main_exec_status
.pid
> 0 &&
1763 dual_timestamp_is_set(&env_source
->main_exec_status
.exit_timestamp
)) {
1764 if (asprintf(our_env
+ n_env
++, "%sEXIT_CODE=%s", monitor_prefix
, sigchld_code_to_string(env_source
->main_exec_status
.code
)) < 0)
1767 if (env_source
->main_exec_status
.code
== CLD_EXITED
)
1768 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%i", monitor_prefix
, env_source
->main_exec_status
.status
);
1770 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%s", monitor_prefix
, signal_to_string(env_source
->main_exec_status
.status
));
1776 if (env_source
!= s
) {
1777 if (!sd_id128_is_null(UNIT(env_source
)->invocation_id
)) {
1778 r
= asprintf(our_env
+ n_env
++, "%sINVOCATION_ID=" SD_ID128_FORMAT_STR
,
1779 monitor_prefix
, SD_ID128_FORMAT_VAL(UNIT(env_source
)->invocation_id
));
1784 if (asprintf(our_env
+ n_env
++, "%sUNIT=%s", monitor_prefix
, UNIT(env_source
)->id
) < 0)
1789 if (UNIT(s
)->activation_details
) {
1790 r
= activation_details_append_env(UNIT(s
)->activation_details
, &our_env
);
1793 /* The number of env vars added here can vary, rather than keeping the allocation block in
1794 * sync manually, these functions simply use the strv methods to append to it, so we need
1795 * to update n_env when we are done in case of future usage. */
1799 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1803 final_env
= strv_env_merge(exec_params
.environment
, our_env
);
1807 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1808 SET_FLAG(exec_params
.flags
, EXEC_NSS_DYNAMIC_BYPASS
,
1809 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1811 strv_free_and_replace(exec_params
.environment
, final_env
);
1812 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1813 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1814 if (s
->type
== SERVICE_IDLE
)
1815 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1816 exec_params
.stdin_fd
= s
->stdin_fd
;
1817 exec_params
.stdout_fd
= s
->stdout_fd
;
1818 exec_params
.stderr_fd
= s
->stderr_fd
;
1820 r
= exec_spawn(UNIT(s
),
1830 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1831 s
->exec_fd_hot
= false;
1833 r
= unit_watch_pid(UNIT(s
), pid
, true);
1842 static int main_pid_good(Service
*s
) {
1845 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1847 /* If we know the pid file, then let's just check if it is
1849 if (s
->main_pid_known
) {
1851 /* If it's an alien child let's check if it is still
1853 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1854 return pid_is_alive(s
->main_pid
);
1856 /* .. otherwise assume we'll get a SIGCHLD for it,
1857 * which we really should wait for to collect exit
1858 * status and code */
1859 return s
->main_pid
> 0;
1862 /* We don't know the pid */
1866 static int control_pid_good(Service
*s
) {
1869 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1870 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1871 * means: we can't figure it out. */
1873 return s
->control_pid
> 0;
1876 static int cgroup_good(Service
*s
) {
1881 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1884 if (!UNIT(s
)->cgroup_path
)
1887 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1894 static bool service_shall_restart(Service
*s
, const char **reason
) {
1897 /* Don't restart after manual stops */
1898 if (s
->forbid_restart
) {
1899 *reason
= "manual stop";
1903 /* Never restart if this is configured as special exception */
1904 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1905 *reason
= "prevented by exit status";
1909 /* Restart if the exit code/status are configured as restart triggers */
1910 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1911 *reason
= "forced by exit status";
1915 *reason
= "restart setting";
1916 switch (s
->restart
) {
1918 case SERVICE_RESTART_NO
:
1921 case SERVICE_RESTART_ALWAYS
:
1922 return s
->result
!= SERVICE_SKIP_CONDITION
;
1924 case SERVICE_RESTART_ON_SUCCESS
:
1925 return s
->result
== SERVICE_SUCCESS
;
1927 case SERVICE_RESTART_ON_FAILURE
:
1928 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1930 case SERVICE_RESTART_ON_ABNORMAL
:
1931 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1933 case SERVICE_RESTART_ON_WATCHDOG
:
1934 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1936 case SERVICE_RESTART_ON_ABORT
:
1937 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1940 assert_not_reached();
1944 static bool service_will_restart(Unit
*u
) {
1945 Service
*s
= SERVICE(u
);
1949 if (s
->will_auto_restart
)
1951 if (IN_SET(s
->state
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
))
1954 return unit_will_restart_default(u
);
1957 static ServiceState
service_determine_dead_state(Service
*s
) {
1960 return s
->fd_store
&& s
->fd_store_preserve_mode
== EXEC_PRESERVE_YES
? SERVICE_DEAD_RESOURCES_PINNED
: SERVICE_DEAD
;
1963 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1964 ServiceState end_state
, restart_state
;
1969 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1970 * undo what has already been enqueued. */
1971 if (unit_stop_pending(UNIT(s
)))
1972 allow_restart
= false;
1974 if (s
->result
== SERVICE_SUCCESS
)
1977 if (s
->result
== SERVICE_SUCCESS
) {
1978 unit_log_success(UNIT(s
));
1979 end_state
= service_determine_dead_state(s
);
1980 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1981 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1982 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1983 end_state
= service_determine_dead_state(s
);
1984 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1986 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1987 end_state
= SERVICE_FAILED
;
1988 restart_state
= SERVICE_FAILED_BEFORE_AUTO_RESTART
;
1990 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1993 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1998 shall_restart
= service_shall_restart(s
, &reason
);
1999 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
2000 shall_restart
? "" : "not ",
2003 s
->will_auto_restart
= true;
2006 if (s
->will_auto_restart
) {
2007 s
->will_auto_restart
= false;
2009 /* We make two state changes here: one that maps to the high-level UNIT_INACTIVE/UNIT_FAILED
2010 * state (i.e. a state indicating deactivation), and then one that that maps to the
2011 * high-level UNIT_STARTING state (i.e. a state indicating activation). We do this so that
2012 * external software can watch the state changes and see all service failures, even if they
2013 * are only transitionary and followed by an automatic restart. We have fine-grained
2014 * low-level states for this though so that software can distinguish the permanent UNIT_INACTIVE
2015 * state from this transitionary UNIT_INACTIVE state by looking at the low-level states. */
2016 service_set_state(s
, restart_state
);
2018 r
= service_arm_timer(s
, /* relative= */ true, service_restart_usec_next(s
));
2022 service_set_state(s
, SERVICE_AUTO_RESTART
);
2024 service_set_state(s
, end_state
);
2026 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
2027 * user can still introspect the counter. Do so on the next start. */
2028 s
->flush_n_restarts
= true;
2031 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
2032 * queue, so that the fd store is possibly gc'ed again */
2033 unit_add_to_gc_queue(UNIT(s
));
2035 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
2036 s
->forbid_restart
= false;
2038 /* Reset NotifyAccess override */
2039 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2041 /* We want fresh tmpdirs in case service is started again immediately */
2042 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2044 /* Also, remove the runtime directory */
2045 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2047 /* Also get rid of the fd store, if that's configured. */
2048 if (s
->fd_store_preserve_mode
== EXEC_PRESERVE_NO
)
2049 service_release_fd_store(s
);
2051 /* Get rid of the IPC bits of the user */
2052 unit_unref_uid_gid(UNIT(s
), true);
2054 /* Try to delete the pid file. At this point it will be
2055 * out-of-date, and some software might be confused by it, so
2056 * let's remove it. */
2058 (void) unlink(s
->pid_file
);
2060 /* Reset TTY ownership if necessary */
2061 exec_context_revert_tty(&s
->exec_context
);
2066 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
2067 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2070 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
2074 if (s
->result
== SERVICE_SUCCESS
)
2077 service_unwatch_control_pid(s
);
2078 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2080 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
2081 if (s
->control_command
) {
2082 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
2084 r
= service_spawn(s
,
2086 s
->timeout_stop_usec
,
2087 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2092 service_set_state(s
, SERVICE_STOP_POST
);
2094 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
2099 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
2100 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2103 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
2106 case SERVICE_STOP_WATCHDOG
:
2107 case SERVICE_FINAL_WATCHDOG
:
2108 return KILL_WATCHDOG
;
2110 case SERVICE_STOP_SIGTERM
:
2111 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
2112 return KILL_RESTART
;
2115 case SERVICE_FINAL_SIGTERM
:
2116 return KILL_TERMINATE
;
2118 case SERVICE_STOP_SIGKILL
:
2119 case SERVICE_FINAL_SIGKILL
:
2123 return _KILL_OPERATION_INVALID
;
2127 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
2128 int kill_operation
, r
;
2132 if (s
->result
== SERVICE_SUCCESS
)
2135 /* Before sending any signal, make sure we track all members of this cgroup */
2136 (void) unit_watch_all_pids(UNIT(s
));
2138 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
2140 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2142 kill_operation
= state_to_kill_operation(s
, state
);
2143 r
= unit_kill_context(
2154 r
= service_arm_timer(s
, /* relative= */ true,
2155 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
);
2159 service_set_state(s
, state
);
2160 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
2161 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
2162 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2163 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2164 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
2165 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2167 service_enter_dead(s
, SERVICE_SUCCESS
, true);
2172 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2174 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2175 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
2177 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2180 static void service_enter_stop_by_notify(Service
*s
) {
2183 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2185 service_arm_timer(s
, /* relative= */ true, s
->timeout_stop_usec
);
2187 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
2188 service_set_state(s
, SERVICE_STOP_SIGTERM
);
2191 static void service_enter_stop(Service
*s
, ServiceResult f
) {
2196 if (s
->result
== SERVICE_SUCCESS
)
2199 service_unwatch_control_pid(s
);
2200 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2202 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
2203 if (s
->control_command
) {
2204 s
->control_command_id
= SERVICE_EXEC_STOP
;
2206 r
= service_spawn(s
,
2208 s
->timeout_stop_usec
,
2209 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2214 service_set_state(s
, SERVICE_STOP
);
2216 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2221 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
2222 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2225 static bool service_good(Service
*s
) {
2229 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
2232 main_pid_ok
= main_pid_good(s
);
2233 if (main_pid_ok
> 0) /* It's alive */
2235 if (main_pid_ok
== 0) /* It's dead */
2238 /* OK, we don't know anything about the main PID, maybe
2239 * because there is none. Let's check the control group
2242 return cgroup_good(s
) != 0;
2245 static void service_enter_running(Service
*s
, ServiceResult f
) {
2248 if (s
->result
== SERVICE_SUCCESS
)
2251 service_unwatch_control_pid(s
);
2253 if (s
->result
!= SERVICE_SUCCESS
)
2254 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2255 else if (service_good(s
)) {
2257 /* If there are any queued up sd_notify() notifications, process them now */
2258 if (s
->notify_state
== NOTIFY_RELOADING
)
2259 service_enter_reload_by_notify(s
);
2260 else if (s
->notify_state
== NOTIFY_STOPPING
)
2261 service_enter_stop_by_notify(s
);
2263 service_set_state(s
, SERVICE_RUNNING
);
2264 service_arm_timer(s
, /* relative= */ false, service_running_timeout(s
));
2267 } else if (s
->remain_after_exit
)
2268 service_set_state(s
, SERVICE_EXITED
);
2270 service_enter_stop(s
, SERVICE_SUCCESS
);
2273 static void service_enter_start_post(Service
*s
) {
2277 service_unwatch_control_pid(s
);
2278 service_reset_watchdog(s
);
2280 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2281 if (s
->control_command
) {
2282 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2284 r
= service_spawn(s
,
2286 s
->timeout_start_usec
,
2287 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2292 service_set_state(s
, SERVICE_START_POST
);
2294 service_enter_running(s
, SERVICE_SUCCESS
);
2299 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2300 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2303 static void service_kill_control_process(Service
*s
) {
2308 if (s
->control_pid
<= 0)
2311 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2313 _cleanup_free_
char *comm
= NULL
;
2315 (void) get_process_comm(s
->control_pid
, &comm
);
2317 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2318 s
->control_pid
, strna(comm
));
2322 static int service_adverse_to_leftover_processes(Service
*s
) {
2325 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2326 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2327 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2328 * time is quite variable (so Timeout settings aren't of use).
2330 * Here we take these two factors and refuse to start a service if there are existing processes
2331 * within a control group. Databases, while generally having some protection against multiple
2332 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2333 * aren't as rigoriously written to protect aganst against multiple use. */
2335 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2336 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2337 !s
->kill_context
.send_sigkill
)
2338 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2339 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2344 static void service_enter_start(Service
*s
) {
2352 service_unwatch_control_pid(s
);
2353 service_unwatch_main_pid(s
);
2355 r
= service_adverse_to_leftover_processes(s
);
2359 if (s
->type
== SERVICE_FORKING
) {
2360 s
->control_command_id
= SERVICE_EXEC_START
;
2361 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2363 s
->main_command
= NULL
;
2365 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2366 s
->control_command
= NULL
;
2368 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2372 if (s
->type
!= SERVICE_ONESHOT
) {
2373 /* There's no command line configured for the main command? Hmm, that is strange.
2374 * This can only happen if the configuration changes at runtime. In this case,
2375 * let's enter a failure state. */
2376 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2380 /* We force a fake state transition here. Otherwise, the unit would go directly from
2381 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2382 * in between. This way we can later trigger actions that depend on the state
2383 * transition, including SuccessAction=. */
2384 service_set_state(s
, SERVICE_START
);
2386 service_enter_start_post(s
);
2390 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2391 /* For simple + idle this is the main process. We don't apply any timeout here, but
2392 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2393 timeout
= USEC_INFINITY
;
2395 timeout
= s
->timeout_start_usec
;
2397 r
= service_spawn(s
,
2400 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
|EXEC_SETENV_MONITOR_RESULT
,
2405 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2406 /* For simple services we immediately start
2407 * the START_POST binaries. */
2409 (void) service_set_main_pid(s
, pid
);
2410 service_enter_start_post(s
);
2412 } else if (s
->type
== SERVICE_FORKING
) {
2414 /* For forking services we wait until the start
2415 * process exited. */
2417 s
->control_pid
= pid
;
2418 service_set_state(s
, SERVICE_START
);
2420 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
, SERVICE_EXEC
)) {
2422 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2424 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2425 * bus. 'notify' and 'exec' services are similar. */
2427 (void) service_set_main_pid(s
, pid
);
2428 service_set_state(s
, SERVICE_START
);
2430 assert_not_reached();
2435 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2436 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2439 static void service_enter_start_pre(Service
*s
) {
2444 service_unwatch_control_pid(s
);
2446 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2447 if (s
->control_command
) {
2449 r
= service_adverse_to_leftover_processes(s
);
2453 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2455 r
= service_spawn(s
,
2457 s
->timeout_start_usec
,
2458 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2463 service_set_state(s
, SERVICE_START_PRE
);
2465 service_enter_start(s
);
2470 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2471 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2474 static void service_enter_condition(Service
*s
) {
2479 service_unwatch_control_pid(s
);
2481 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2482 if (s
->control_command
) {
2484 r
= service_adverse_to_leftover_processes(s
);
2488 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2490 r
= service_spawn(s
,
2492 s
->timeout_start_usec
,
2493 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2499 service_set_state(s
, SERVICE_CONDITION
);
2501 service_enter_start_pre(s
);
2506 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2507 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2510 static void service_enter_restart(Service
*s
) {
2511 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2516 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2517 /* Don't restart things if we are going down anyway */
2518 log_unit_info(UNIT(s
), "Stop job pending for unit, skipping automatic restart.");
2522 /* Any units that are bound to this service must also be
2523 * restarted. We use JOB_RESTART (instead of the more obvious
2524 * JOB_START) here so that those dependency jobs will be added
2526 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2530 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2531 * stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset the counter
2532 * explicitly however via the usual "systemctl reset-failure" logic. */
2534 s
->flush_n_restarts
= false;
2536 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2538 log_unit_struct(UNIT(s
), LOG_INFO
,
2539 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2540 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2541 LOG_UNIT_MESSAGE(UNIT(s
),
2542 "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2543 "N_RESTARTS=%u", s
->n_restarts
);
2545 /* Notify clients about changed restart counter */
2546 unit_add_to_dbus_queue(UNIT(s
));
2548 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2549 * it will be canceled as part of the service_stop() call that
2550 * is executed as part of JOB_RESTART. */
2555 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2556 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2559 static void service_enter_reload_by_notify(Service
*s
) {
2560 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2565 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2566 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
2568 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2569 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2571 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2574 static void service_enter_reload(Service
*s
) {
2575 bool killed
= false;
2580 service_unwatch_control_pid(s
);
2581 s
->reload_result
= SERVICE_SUCCESS
;
2583 usec_t ts
= now(CLOCK_MONOTONIC
);
2585 if (s
->type
== SERVICE_NOTIFY_RELOAD
&& s
->main_pid
> 0) {
2586 r
= kill_and_sigcont(s
->main_pid
, s
->reload_signal
);
2588 log_unit_warning_errno(UNIT(s
), r
, "Failed to send reload signal: %m");
2595 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2596 if (s
->control_command
) {
2597 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2599 r
= service_spawn(s
,
2601 s
->timeout_start_usec
,
2602 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2605 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2609 service_set_state(s
, SERVICE_RELOAD
);
2610 } else if (killed
) {
2611 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2612 service_set_state(s
, SERVICE_RELOAD_SIGNAL
);
2614 service_enter_running(s
, SERVICE_SUCCESS
);
2618 /* Store the timestamp when we started reloading: when reloading via SIGHUP we won't leave the reload
2619 * state until we received both RELOADING=1 and READY=1 with MONOTONIC_USEC= set to a value above
2620 * this. Thus we know for sure the reload cycle was executed *after* we requested it, and is not one
2621 * that was already in progress before. */
2622 s
->reload_begin_usec
= ts
;
2626 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2627 service_enter_running(s
, SERVICE_SUCCESS
);
2630 static void service_run_next_control(Service
*s
) {
2635 assert(s
->control_command
);
2636 assert(s
->control_command
->command_next
);
2638 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2640 s
->control_command
= s
->control_command
->command_next
;
2641 service_unwatch_control_pid(s
);
2643 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2644 timeout
= s
->timeout_start_usec
;
2646 timeout
= s
->timeout_stop_usec
;
2648 r
= service_spawn(s
,
2651 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2652 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2653 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2654 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_START
) ? EXEC_SETENV_MONITOR_RESULT
: 0)|
2655 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2663 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2665 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2666 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2667 else if (s
->state
== SERVICE_STOP_POST
)
2668 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2669 else if (s
->state
== SERVICE_RELOAD
) {
2670 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2671 service_enter_running(s
, SERVICE_SUCCESS
);
2673 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2676 static void service_run_next_main(Service
*s
) {
2681 assert(s
->main_command
);
2682 assert(s
->main_command
->command_next
);
2683 assert(s
->type
== SERVICE_ONESHOT
);
2685 s
->main_command
= s
->main_command
->command_next
;
2686 service_unwatch_main_pid(s
);
2688 r
= service_spawn(s
,
2690 s
->timeout_start_usec
,
2691 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_SETENV_MONITOR_RESULT
,
2696 (void) service_set_main_pid(s
, pid
);
2701 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2702 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2705 static int service_start(Unit
*u
) {
2706 Service
*s
= SERVICE(u
);
2711 /* We cannot fulfill this request right now, try again later
2713 if (IN_SET(s
->state
,
2714 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2715 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2718 /* Already on it! */
2719 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2722 /* A service that will be restarted must be stopped first to trigger BindsTo and/or OnFailure
2723 * dependencies. If a user does not want to wait for the holdoff time to elapse, the service should
2724 * be manually restarted, not started. We simply return EAGAIN here, so that any start jobs stay
2725 * queued, and assume that the auto restart timer will eventually trigger the restart. */
2726 if (IN_SET(s
->state
, SERVICE_AUTO_RESTART
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
))
2729 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
));
2731 r
= unit_acquire_invocation_id(u
);
2735 s
->result
= SERVICE_SUCCESS
;
2736 s
->reload_result
= SERVICE_SUCCESS
;
2737 s
->main_pid_known
= false;
2738 s
->main_pid_alien
= false;
2739 s
->forbid_restart
= false;
2741 s
->status_text
= mfree(s
->status_text
);
2742 s
->status_errno
= 0;
2744 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2745 s
->notify_state
= NOTIFY_UNKNOWN
;
2747 s
->watchdog_original_usec
= s
->watchdog_usec
;
2748 s
->watchdog_override_enable
= false;
2749 s
->watchdog_override_usec
= USEC_INFINITY
;
2751 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2752 exec_status_reset(&s
->main_exec_status
);
2754 /* This is not an automatic restart? Flush the restart counter then */
2755 if (s
->flush_n_restarts
) {
2757 s
->flush_n_restarts
= false;
2760 u
->reset_accounting
= true;
2762 service_enter_condition(s
);
2766 static int service_stop(Unit
*u
) {
2767 Service
*s
= SERVICE(u
);
2771 /* Don't create restart jobs from manual stops. */
2772 s
->forbid_restart
= true;
2777 case SERVICE_STOP_SIGTERM
:
2778 case SERVICE_STOP_SIGKILL
:
2779 case SERVICE_STOP_POST
:
2780 case SERVICE_FINAL_WATCHDOG
:
2781 case SERVICE_FINAL_SIGTERM
:
2782 case SERVICE_FINAL_SIGKILL
:
2786 case SERVICE_AUTO_RESTART
:
2787 /* A restart will be scheduled or is in progress. */
2788 service_set_state(s
, service_determine_dead_state(s
));
2791 case SERVICE_CONDITION
:
2792 case SERVICE_START_PRE
:
2794 case SERVICE_START_POST
:
2795 case SERVICE_RELOAD
:
2796 case SERVICE_RELOAD_SIGNAL
:
2797 case SERVICE_RELOAD_NOTIFY
:
2798 case SERVICE_STOP_WATCHDOG
:
2799 /* If there's already something running we go directly into kill mode. */
2800 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2803 case SERVICE_CLEANING
:
2804 /* If we are currently cleaning, then abort it, brutally. */
2805 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2808 case SERVICE_RUNNING
:
2809 case SERVICE_EXITED
:
2810 service_enter_stop(s
, SERVICE_SUCCESS
);
2813 case SERVICE_DEAD_BEFORE_AUTO_RESTART
:
2814 case SERVICE_FAILED_BEFORE_AUTO_RESTART
:
2816 case SERVICE_FAILED
:
2817 case SERVICE_DEAD_RESOURCES_PINNED
:
2819 /* Unknown state, or unit_stop() should already have handled these */
2820 assert_not_reached();
2824 static int service_reload(Unit
*u
) {
2825 Service
*s
= SERVICE(u
);
2829 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2831 service_enter_reload(s
);
2835 _pure_
static bool service_can_reload(Unit
*u
) {
2836 Service
*s
= SERVICE(u
);
2840 return s
->exec_command
[SERVICE_EXEC_RELOAD
] ||
2841 s
->type
== SERVICE_NOTIFY_RELOAD
;
2844 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, const ExecCommand
*current
) {
2845 Service
*s
= SERVICE(u
);
2850 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2852 const ExecCommand
*first
= s
->exec_command
[id
];
2854 /* Figure out where we are in the list by walking back to the beginning */
2855 for (const ExecCommand
*c
= current
; c
!= first
; c
= c
->command_prev
)
2861 static int service_serialize_exec_command(Unit
*u
, FILE *f
, const ExecCommand
*command
) {
2862 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2863 Service
*s
= SERVICE(u
);
2864 const char *type
, *key
;
2865 ServiceExecCommand id
;
2875 if (command
== s
->control_command
) {
2877 id
= s
->control_command_id
;
2880 id
= SERVICE_EXEC_START
;
2883 idx
= service_exec_command_index(u
, id
, command
);
2885 STRV_FOREACH(arg
, command
->argv
) {
2886 _cleanup_free_
char *e
= NULL
;
2894 if (!GREEDY_REALLOC(args
, length
+ 2 + n
+ 2))
2898 args
[length
++] = ' ';
2900 args
[length
++] = '"';
2901 memcpy(args
+ length
, e
, n
);
2903 args
[length
++] = '"';
2906 if (!GREEDY_REALLOC(args
, length
+ 1))
2911 p
= cescape(command
->path
);
2915 key
= strjoina(type
, "-command");
2917 /* We use '+1234' instead of '1234' to mark the last command in a sequence.
2918 * This is used in service_deserialize_exec_command(). */
2919 (void) serialize_item_format(
2922 service_exec_command_to_string(id
),
2923 command
->command_next
? "" : "+",
2930 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2931 Service
*s
= SERVICE(u
);
2938 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2939 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2940 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2942 if (s
->control_pid
> 0)
2943 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2945 if (s
->main_pid_known
&& s
->main_pid
> 0)
2946 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2948 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2949 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2950 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2952 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2953 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2955 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2959 service_serialize_exec_command(u
, f
, s
->control_command
);
2960 service_serialize_exec_command(u
, f
, s
->main_command
);
2962 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2965 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2968 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2972 if (s
->exec_fd_event_source
) {
2973 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2977 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2980 if (UNIT_ISSET(s
->accept_socket
)) {
2981 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2986 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2990 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2991 _cleanup_free_
char *c
= NULL
;
2994 copy
= fdset_put_dup(fds
, fs
->fd
);
2996 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2998 c
= cescape(fs
->fdname
);
3002 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
3005 if (s
->main_exec_status
.pid
> 0) {
3006 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
3007 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
3008 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
3010 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
3011 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
3012 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
3016 if (s
->notify_access_override
>= 0)
3017 (void) serialize_item(f
, "notify-access-override", notify_access_to_string(s
->notify_access_override
));
3019 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
3020 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
3022 if (s
->watchdog_override_enable
)
3023 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
3025 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
3026 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
3028 if (s
->reload_begin_usec
!= USEC_INFINITY
)
3029 (void) serialize_item_format(f
, "reload-begin-usec", USEC_FMT
, s
->reload_begin_usec
);
3034 int service_deserialize_exec_command(
3037 const char *value
) {
3039 Service
*s
= SERVICE(u
);
3041 unsigned idx
= 0, i
;
3042 bool control
, found
= false, last
= false;
3043 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
3044 ExecCommand
*command
= NULL
;
3045 _cleanup_free_
char *path
= NULL
;
3046 _cleanup_strv_free_
char **argv
= NULL
;
3048 enum ExecCommandState
{
3049 STATE_EXEC_COMMAND_TYPE
,
3050 STATE_EXEC_COMMAND_INDEX
,
3051 STATE_EXEC_COMMAND_PATH
,
3052 STATE_EXEC_COMMAND_ARGS
,
3053 _STATE_EXEC_COMMAND_MAX
,
3054 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
3061 control
= streq(key
, "control-command");
3063 state
= STATE_EXEC_COMMAND_TYPE
;
3066 _cleanup_free_
char *arg
= NULL
;
3068 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3075 case STATE_EXEC_COMMAND_TYPE
:
3076 id
= service_exec_command_from_string(arg
);
3080 state
= STATE_EXEC_COMMAND_INDEX
;
3082 case STATE_EXEC_COMMAND_INDEX
:
3083 /* PID 1234 is serialized as either '1234' or '+1234'. The second form is used to
3084 * mark the last command in a sequence. We warn if the deserialized command doesn't
3085 * match what we have loaded from the unit, but we don't need to warn if that is the
3088 r
= safe_atou(arg
, &idx
);
3091 last
= arg
[0] == '+';
3093 state
= STATE_EXEC_COMMAND_PATH
;
3095 case STATE_EXEC_COMMAND_PATH
:
3096 path
= TAKE_PTR(arg
);
3097 state
= STATE_EXEC_COMMAND_ARGS
;
3099 case STATE_EXEC_COMMAND_ARGS
:
3100 r
= strv_extend(&argv
, arg
);
3105 assert_not_reached();
3109 if (state
!= STATE_EXEC_COMMAND_ARGS
)
3111 if (strv_isempty(argv
))
3112 return -EINVAL
; /* At least argv[0] must be always present. */
3114 /* Let's check whether exec command on given offset matches data that we just deserialized */
3115 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
3119 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
3124 /* Command at the index we serialized is different, let's look for command that exactly
3125 * matches but is on different index. If there is no such command we will not resume execution. */
3126 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
3127 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
3131 if (command
&& control
) {
3132 s
->control_command
= command
;
3133 s
->control_command_id
= id
;
3135 s
->main_command
= command
;
3137 log_unit_debug(u
, "Current command vanished from the unit file.");
3139 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
3144 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
3145 Service
*s
= SERVICE(u
);
3153 if (streq(key
, "state")) {
3156 state
= service_state_from_string(value
);
3158 log_unit_debug(u
, "Failed to parse state value: %s", value
);
3160 s
->deserialized_state
= state
;
3161 } else if (streq(key
, "result")) {
3164 f
= service_result_from_string(value
);
3166 log_unit_debug(u
, "Failed to parse result value: %s", value
);
3167 else if (f
!= SERVICE_SUCCESS
)
3170 } else if (streq(key
, "reload-result")) {
3173 f
= service_result_from_string(value
);
3175 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
3176 else if (f
!= SERVICE_SUCCESS
)
3177 s
->reload_result
= f
;
3179 } else if (streq(key
, "control-pid")) {
3182 if (parse_pid(value
, &pid
) < 0)
3183 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
3185 s
->control_pid
= pid
;
3186 } else if (streq(key
, "main-pid")) {
3189 if (parse_pid(value
, &pid
) < 0)
3190 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
3192 (void) service_set_main_pid(s
, pid
);
3193 } else if (streq(key
, "main-pid-known")) {
3196 b
= parse_boolean(value
);
3198 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
3200 s
->main_pid_known
= b
;
3201 } else if (streq(key
, "bus-name-good")) {
3204 b
= parse_boolean(value
);
3206 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
3208 s
->bus_name_good
= b
;
3209 } else if (streq(key
, "bus-name-owner")) {
3210 r
= free_and_strdup(&s
->bus_name_owner
, value
);
3212 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
3213 } else if (streq(key
, "status-text")) {
3217 l
= cunescape(value
, 0, &t
);
3219 log_unit_debug_errno(u
, l
, "Failed to unescape status text '%s': %m", value
);
3221 free_and_replace(s
->status_text
, t
);
3223 } else if (streq(key
, "accept-socket")) {
3226 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
3228 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
3230 unit_ref_set(&s
->accept_socket
, u
, socket
);
3231 SOCKET(socket
)->n_connections
++;
3234 } else if (streq(key
, "socket-fd")) {
3237 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3238 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
3240 asynchronous_close(s
->socket_fd
);
3241 s
->socket_fd
= fdset_remove(fds
, fd
);
3243 } else if (streq(key
, "fd-store-fd")) {
3244 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
3248 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
3249 if (r
<= 0 || safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
)) {
3250 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3254 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3256 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3260 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
3262 /* If the value is not present, we assume the default */
3264 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
3265 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
3269 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
3271 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
3273 fdset_remove(fds
, fd
);
3274 } else if (streq(key
, "main-exec-status-pid")) {
3277 if (parse_pid(value
, &pid
) < 0)
3278 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
3280 s
->main_exec_status
.pid
= pid
;
3281 } else if (streq(key
, "main-exec-status-code")) {
3284 if (safe_atoi(value
, &i
) < 0)
3285 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
3287 s
->main_exec_status
.code
= i
;
3288 } else if (streq(key
, "main-exec-status-status")) {
3291 if (safe_atoi(value
, &i
) < 0)
3292 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3294 s
->main_exec_status
.status
= i
;
3295 } else if (streq(key
, "main-exec-status-start"))
3296 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3297 else if (streq(key
, "main-exec-status-exit"))
3298 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3299 else if (streq(key
, "notify-access-override")) {
3300 NotifyAccess notify_access
;
3302 notify_access
= notify_access_from_string(value
);
3303 if (notify_access
< 0)
3304 log_unit_debug(u
, "Failed to parse notify-access-override value: %s", value
);
3306 s
->notify_access_override
= notify_access
;
3307 } else if (streq(key
, "watchdog-timestamp"))
3308 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3309 else if (streq(key
, "forbid-restart")) {
3312 b
= parse_boolean(value
);
3314 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3316 s
->forbid_restart
= b
;
3317 } else if (streq(key
, "stdin-fd")) {
3320 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3321 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3323 asynchronous_close(s
->stdin_fd
);
3324 s
->stdin_fd
= fdset_remove(fds
, fd
);
3325 s
->exec_context
.stdio_as_fds
= true;
3327 } else if (streq(key
, "stdout-fd")) {
3330 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3331 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3333 asynchronous_close(s
->stdout_fd
);
3334 s
->stdout_fd
= fdset_remove(fds
, fd
);
3335 s
->exec_context
.stdio_as_fds
= true;
3337 } else if (streq(key
, "stderr-fd")) {
3340 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3341 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3343 asynchronous_close(s
->stderr_fd
);
3344 s
->stderr_fd
= fdset_remove(fds
, fd
);
3345 s
->exec_context
.stdio_as_fds
= true;
3347 } else if (streq(key
, "exec-fd")) {
3350 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3351 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3353 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3355 fd
= fdset_remove(fds
, fd
);
3356 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3359 } else if (streq(key
, "watchdog-override-usec")) {
3360 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3361 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3363 s
->watchdog_override_enable
= true;
3365 } else if (streq(key
, "watchdog-original-usec")) {
3366 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3367 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3369 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3370 r
= service_deserialize_exec_command(u
, key
, value
);
3372 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3374 } else if (streq(key
, "n-restarts")) {
3375 r
= safe_atou(value
, &s
->n_restarts
);
3377 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3379 } else if (streq(key
, "flush-n-restarts")) {
3380 r
= parse_boolean(value
);
3382 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3384 s
->flush_n_restarts
= r
;
3385 } else if (streq(key
, "reload-begin-usec")) {
3386 r
= deserialize_usec(value
, &s
->reload_begin_usec
);
3388 log_unit_debug_errno(u
, r
, "Failed to parse serialized reload begin timestamp '%s', ignoring: %m", value
);
3390 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3395 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3396 const UnitActiveState
*table
;
3400 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3402 return table
[SERVICE(u
)->state
];
3405 static const char *service_sub_state_to_string(Unit
*u
) {
3408 return service_state_to_string(SERVICE(u
)->state
);
3411 static bool service_may_gc(Unit
*u
) {
3412 Service
*s
= SERVICE(u
);
3416 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3417 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3418 * have moved outside of the cgroup. */
3420 if (main_pid_good(s
) > 0 ||
3421 control_pid_good(s
) > 0)
3424 /* Only allow collection of actually dead services, i.e. not those that are in the transitionary
3425 * SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART states. */
3426 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
3432 static int service_retry_pid_file(Service
*s
) {
3435 assert(s
->pid_file
);
3436 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3438 r
= service_load_pid_file(s
, false);
3442 service_unwatch_pid_file(s
);
3444 service_enter_running(s
, SERVICE_SUCCESS
);
3448 static int service_watch_pid_file(Service
*s
) {
3451 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3453 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3457 /* the pidfile might have appeared just before we set the watch */
3458 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3459 service_retry_pid_file(s
);
3463 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3464 service_unwatch_pid_file(s
);
3468 static int service_demand_pid_file(Service
*s
) {
3469 _cleanup_free_ PathSpec
*ps
= NULL
;
3471 assert(s
->pid_file
);
3472 assert(!s
->pid_file_pathspec
);
3474 ps
= new(PathSpec
, 1);
3480 .path
= strdup(s
->pid_file
),
3481 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that keep their PID file
3482 * open all the time. */
3483 .type
= PATH_MODIFIED
,
3484 .inotify_fd
= -EBADF
,
3490 path_simplify(ps
->path
);
3492 s
->pid_file_pathspec
= TAKE_PTR(ps
);
3494 return service_watch_pid_file(s
);
3497 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3498 PathSpec
*p
= ASSERT_PTR(userdata
);
3501 s
= SERVICE(p
->unit
);
3505 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3506 assert(s
->pid_file_pathspec
);
3507 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3509 log_unit_debug(UNIT(s
), "inotify event");
3511 if (path_spec_fd_event(p
, events
) < 0)
3514 if (service_retry_pid_file(s
) == 0)
3517 if (service_watch_pid_file(s
) < 0)
3523 service_unwatch_pid_file(s
);
3524 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3528 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3529 Service
*s
= SERVICE(userdata
);
3533 log_unit_debug(UNIT(s
), "got exec-fd event");
3535 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3536 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3537 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3538 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3539 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3540 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3541 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3542 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3548 n
= read(fd
, &x
, sizeof(x
));
3550 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3553 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3555 if (n
== 0) { /* EOF → the event we are waiting for */
3557 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3559 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3560 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3562 s
->exec_fd_hot
= false;
3564 /* Nice! This is what we have been waiting for. Transition to next state. */
3565 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3566 service_enter_start_post(s
);
3568 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3573 /* A byte was read → this turns on/off the exec fd logic */
3574 assert(n
== sizeof(x
));
3581 static void service_notify_cgroup_empty_event(Unit
*u
) {
3582 Service
*s
= SERVICE(u
);
3586 log_unit_debug(u
, "Control group is empty.");
3590 /* Waiting for SIGCHLD is usually more interesting, because it includes return
3591 * codes/signals. Which is why we ignore the cgroup events for most cases, except when we
3592 * don't know pid which to expect the SIGCHLD for. */
3595 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
3596 main_pid_good(s
) == 0 &&
3597 control_pid_good(s
) == 0) {
3598 /* No chance of getting a ready notification anymore */
3599 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3603 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& main_pid_good(s
) <= 0)
3604 service_enter_start_post(s
);
3607 case SERVICE_START_POST
:
3608 if (s
->pid_file_pathspec
&&
3609 main_pid_good(s
) == 0 &&
3610 control_pid_good(s
) == 0) {
3612 /* Give up hoping for the daemon to write its PID file */
3613 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3615 service_unwatch_pid_file(s
);
3616 if (s
->state
== SERVICE_START
)
3617 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3619 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3623 case SERVICE_RUNNING
:
3624 /* service_enter_running() will figure out what to do */
3625 service_enter_running(s
, SERVICE_SUCCESS
);
3628 case SERVICE_STOP_WATCHDOG
:
3629 case SERVICE_STOP_SIGTERM
:
3630 case SERVICE_STOP_SIGKILL
:
3632 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3633 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3637 case SERVICE_STOP_POST
:
3638 case SERVICE_FINAL_WATCHDOG
:
3639 case SERVICE_FINAL_SIGTERM
:
3640 case SERVICE_FINAL_SIGKILL
:
3641 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3642 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3646 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3647 * up the cgroup earlier and should do it now. */
3649 case SERVICE_FAILED
:
3650 case SERVICE_DEAD_BEFORE_AUTO_RESTART
:
3651 case SERVICE_FAILED_BEFORE_AUTO_RESTART
:
3652 case SERVICE_AUTO_RESTART
:
3653 case SERVICE_DEAD_RESOURCES_PINNED
:
3654 unit_prune_cgroup(u
);
3662 static void service_notify_cgroup_oom_event(Unit
*u
, bool managed_oom
) {
3663 Service
*s
= SERVICE(u
);
3666 log_unit_debug(u
, "Process(es) of control group were killed by systemd-oomd.");
3668 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3670 if (s
->oom_policy
== OOM_CONTINUE
)
3675 case SERVICE_CONDITION
:
3676 case SERVICE_START_PRE
:
3678 case SERVICE_START_POST
:
3680 if (s
->oom_policy
== OOM_STOP
)
3681 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3682 else if (s
->oom_policy
== OOM_KILL
)
3683 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3687 case SERVICE_EXITED
:
3688 case SERVICE_RUNNING
:
3689 if (s
->oom_policy
== OOM_STOP
)
3690 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3691 else if (s
->oom_policy
== OOM_KILL
)
3692 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3696 case SERVICE_STOP_WATCHDOG
:
3697 case SERVICE_STOP_SIGTERM
:
3698 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3701 case SERVICE_STOP_SIGKILL
:
3702 case SERVICE_FINAL_SIGKILL
:
3703 if (s
->result
== SERVICE_SUCCESS
)
3704 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3707 case SERVICE_STOP_POST
:
3708 case SERVICE_FINAL_SIGTERM
:
3709 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3717 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3718 bool notify_dbus
= true;
3719 Service
*s
= SERVICE(u
);
3721 ExitClean clean_mode
;
3726 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3727 * considered daemons as they are typically not long running. */
3728 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3729 clean_mode
= EXIT_CLEAN_COMMAND
;
3731 clean_mode
= EXIT_CLEAN_DAEMON
;
3733 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3734 f
= SERVICE_SUCCESS
;
3735 else if (code
== CLD_EXITED
)
3736 f
= SERVICE_FAILURE_EXIT_CODE
;
3737 else if (code
== CLD_KILLED
)
3738 f
= SERVICE_FAILURE_SIGNAL
;
3739 else if (code
== CLD_DUMPED
)
3740 f
= SERVICE_FAILURE_CORE_DUMP
;
3742 assert_not_reached();
3744 if (s
->main_pid
== pid
) {
3745 /* Clean up the exec_fd event source. We want to do this here, not later in
3746 * service_set_state(), because service_enter_stop_post() calls service_spawn().
3747 * The source owns its end of the pipe, so this will close that too. */
3748 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3750 /* Forking services may occasionally move to a new PID.
3751 * As long as they update the PID file before exiting the old
3752 * PID, they're fine. */
3753 if (service_load_pid_file(s
, false) > 0)
3757 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3759 if (s
->main_command
) {
3760 /* If this is not a forking service than the
3761 * main process got started and hence we copy
3762 * the exit status so that it is recorded both
3763 * as main and as control process exit
3766 s
->main_command
->exec_status
= s
->main_exec_status
;
3768 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3769 f
= SERVICE_SUCCESS
;
3770 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3772 /* If this is a forked process, then we should
3773 * ignore the return value if this was
3774 * configured for the starter process */
3776 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3777 f
= SERVICE_SUCCESS
;
3780 unit_log_process_exit(
3783 service_exec_command_to_string(SERVICE_EXEC_START
),
3784 f
== SERVICE_SUCCESS
,
3787 if (s
->result
== SERVICE_SUCCESS
)
3790 if (s
->main_command
&&
3791 s
->main_command
->command_next
&&
3792 s
->type
== SERVICE_ONESHOT
&&
3793 f
== SERVICE_SUCCESS
) {
3795 /* There is another command to execute, so let's do that. */
3797 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3798 service_run_next_main(s
);
3801 s
->main_command
= NULL
;
3803 /* Services with ExitType=cgroup do not act on main PID exiting, unless the cgroup is
3805 if (s
->exit_type
== SERVICE_EXIT_MAIN
|| cgroup_good(s
) <= 0) {
3806 /* The service exited, so the service is officially gone. */
3809 case SERVICE_START_POST
:
3810 case SERVICE_RELOAD
:
3811 case SERVICE_RELOAD_SIGNAL
:
3812 case SERVICE_RELOAD_NOTIFY
:
3813 /* If neither main nor control processes are running then the current
3814 * state can never exit cleanly, hence immediately terminate the
3816 if (control_pid_good(s
) <= 0)
3817 service_enter_stop(s
, f
);
3819 /* Otherwise need to wait until the operation is done. */
3823 /* Need to wait until the operation is done. */
3827 if (s
->type
== SERVICE_ONESHOT
) {
3828 /* This was our main goal, so let's go on */
3829 if (f
== SERVICE_SUCCESS
)
3830 service_enter_start_post(s
);
3832 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3834 } else if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
)) {
3835 /* Only enter running through a notification, so that the
3836 * SERVICE_START state signifies that no ready notification
3837 * has been received */
3838 if (f
!= SERVICE_SUCCESS
)
3839 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3840 else if (!s
->remain_after_exit
|| service_get_notify_access(s
) == NOTIFY_MAIN
)
3841 /* The service has never been and will never be active */
3842 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3847 case SERVICE_RUNNING
:
3848 service_enter_running(s
, f
);
3851 case SERVICE_STOP_WATCHDOG
:
3852 case SERVICE_STOP_SIGTERM
:
3853 case SERVICE_STOP_SIGKILL
:
3855 if (control_pid_good(s
) <= 0)
3856 service_enter_stop_post(s
, f
);
3858 /* If there is still a control process, wait for that first */
3861 case SERVICE_STOP_POST
:
3863 if (control_pid_good(s
) <= 0)
3864 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3868 case SERVICE_FINAL_WATCHDOG
:
3869 case SERVICE_FINAL_SIGTERM
:
3870 case SERVICE_FINAL_SIGKILL
:
3872 if (control_pid_good(s
) <= 0)
3873 service_enter_dead(s
, f
, true);
3877 assert_not_reached();
3882 } else if (s
->control_pid
== pid
) {
3888 if (s
->control_command
) {
3889 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3891 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3892 f
= SERVICE_SUCCESS
;
3895 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3896 if (s
->state
== SERVICE_CONDITION
) {
3897 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3898 UNIT(s
)->condition_result
= false;
3899 f
= SERVICE_SKIP_CONDITION
;
3901 } else if (f
== SERVICE_SUCCESS
) {
3902 UNIT(s
)->condition_result
= true;
3907 kind
= "Condition check process";
3909 kind
= "Control process";
3910 success
= f
== SERVICE_SUCCESS
;
3913 unit_log_process_exit(
3916 service_exec_command_to_string(s
->control_command_id
),
3920 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3923 if (s
->control_command
&&
3924 s
->control_command
->command_next
&&
3925 f
== SERVICE_SUCCESS
) {
3927 /* There is another command to * execute, so let's do that. */
3929 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3930 service_run_next_control(s
);
3933 /* No further commands for this step, so let's figure out what to do next */
3935 s
->control_command
= NULL
;
3936 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3938 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3942 case SERVICE_CONDITION
:
3943 if (f
== SERVICE_SUCCESS
)
3944 service_enter_start_pre(s
);
3946 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3949 case SERVICE_START_PRE
:
3950 if (f
== SERVICE_SUCCESS
)
3951 service_enter_start(s
);
3953 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3957 if (s
->type
!= SERVICE_FORKING
)
3958 /* Maybe spurious event due to a reload that changed the type? */
3961 if (f
!= SERVICE_SUCCESS
) {
3962 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3967 bool has_start_post
;
3970 /* Let's try to load the pid file here if we can.
3971 * The PID file might actually be created by a START_POST
3972 * script. In that case don't worry if the loading fails. */
3974 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3975 r
= service_load_pid_file(s
, !has_start_post
);
3976 if (!has_start_post
&& r
< 0) {
3977 r
= service_demand_pid_file(s
);
3978 if (r
< 0 || cgroup_good(s
) == 0)
3979 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3983 service_search_main_pid(s
);
3985 service_enter_start_post(s
);
3988 case SERVICE_START_POST
:
3989 if (f
!= SERVICE_SUCCESS
) {
3990 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3997 r
= service_load_pid_file(s
, true);
3999 r
= service_demand_pid_file(s
);
4000 if (r
< 0 || cgroup_good(s
) == 0)
4001 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
4005 service_search_main_pid(s
);
4007 service_enter_running(s
, SERVICE_SUCCESS
);
4010 case SERVICE_RELOAD
:
4011 case SERVICE_RELOAD_SIGNAL
:
4012 case SERVICE_RELOAD_NOTIFY
:
4013 if (f
== SERVICE_SUCCESS
)
4014 if (service_load_pid_file(s
, true) < 0)
4015 service_search_main_pid(s
);
4017 s
->reload_result
= f
;
4019 /* If the last notification we received from the service process indicates
4020 * we are still reloading, then don't leave reloading state just yet, just
4021 * transition into SERVICE_RELOAD_NOTIFY, to wait for the READY=1 coming,
4023 if (s
->notify_state
== NOTIFY_RELOADING
)
4024 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4026 service_enter_running(s
, SERVICE_SUCCESS
);
4030 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
4033 case SERVICE_STOP_WATCHDOG
:
4034 case SERVICE_STOP_SIGTERM
:
4035 case SERVICE_STOP_SIGKILL
:
4036 if (main_pid_good(s
) <= 0)
4037 service_enter_stop_post(s
, f
);
4039 /* If there is still a service process around, wait until
4040 * that one quit, too */
4043 case SERVICE_STOP_POST
:
4044 if (main_pid_good(s
) <= 0)
4045 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
4048 case SERVICE_FINAL_WATCHDOG
:
4049 case SERVICE_FINAL_SIGTERM
:
4050 case SERVICE_FINAL_SIGKILL
:
4051 if (main_pid_good(s
) <= 0)
4052 service_enter_dead(s
, f
, true);
4055 case SERVICE_CLEANING
:
4057 if (s
->clean_result
== SERVICE_SUCCESS
)
4058 s
->clean_result
= f
;
4060 service_enter_dead(s
, SERVICE_SUCCESS
, false);
4064 assert_not_reached();
4067 } else /* Neither control nor main PID? If so, don't notify about anything */
4068 notify_dbus
= false;
4070 /* Notify clients about changed exit status */
4072 unit_add_to_dbus_queue(u
);
4074 /* We watch the main/control process otherwise we can't retrieve the unit they
4075 * belong to with cgroupv1. But if they are not our direct child, we won't get a
4076 * SIGCHLD for them. Therefore we need to look for others to watch so we can
4077 * detect when the cgroup becomes empty. Note that the control process is always
4078 * our child so it's pointless to watch all other processes. */
4079 if (!control_pid_good(s
))
4080 if (!s
->main_pid_known
|| s
->main_pid_alien
)
4081 (void) unit_enqueue_rewatch_pids(u
);
4084 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4085 Service
*s
= SERVICE(userdata
);
4088 assert(source
== s
->timer_event_source
);
4092 case SERVICE_CONDITION
:
4093 case SERVICE_START_PRE
:
4095 case SERVICE_START_POST
:
4096 switch (s
->timeout_start_failure_mode
) {
4098 case SERVICE_TIMEOUT_TERMINATE
:
4099 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
4100 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4103 case SERVICE_TIMEOUT_ABORT
:
4104 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
4105 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4108 case SERVICE_TIMEOUT_KILL
:
4109 if (s
->kill_context
.send_sigkill
) {
4110 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
4111 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4113 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
4114 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4119 assert_not_reached();
4123 case SERVICE_RUNNING
:
4124 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
4125 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
4128 case SERVICE_RELOAD
:
4129 case SERVICE_RELOAD_SIGNAL
:
4130 case SERVICE_RELOAD_NOTIFY
:
4131 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
4132 service_kill_control_process(s
);
4133 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
4134 service_enter_running(s
, SERVICE_SUCCESS
);
4138 switch (s
->timeout_stop_failure_mode
) {
4140 case SERVICE_TIMEOUT_TERMINATE
:
4141 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
4142 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4145 case SERVICE_TIMEOUT_ABORT
:
4146 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
4147 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4150 case SERVICE_TIMEOUT_KILL
:
4151 if (s
->kill_context
.send_sigkill
) {
4152 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
4153 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4155 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
4156 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4161 assert_not_reached();
4165 case SERVICE_STOP_WATCHDOG
:
4166 if (s
->kill_context
.send_sigkill
) {
4167 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
4168 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4170 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
4171 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4175 case SERVICE_STOP_SIGTERM
:
4176 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4177 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
4178 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4179 } else if (s
->kill_context
.send_sigkill
) {
4180 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
4181 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4183 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
4184 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4189 case SERVICE_STOP_SIGKILL
:
4190 /* Uh, we sent a SIGKILL and it is still not gone?
4191 * Must be something we cannot kill, so let's just be
4192 * weirded out and continue */
4194 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
4195 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4198 case SERVICE_STOP_POST
:
4199 switch (s
->timeout_stop_failure_mode
) {
4201 case SERVICE_TIMEOUT_TERMINATE
:
4202 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
4203 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4206 case SERVICE_TIMEOUT_ABORT
:
4207 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
4208 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4211 case SERVICE_TIMEOUT_KILL
:
4212 if (s
->kill_context
.send_sigkill
) {
4213 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
4214 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4216 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
4217 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4222 assert_not_reached();
4226 case SERVICE_FINAL_WATCHDOG
:
4227 if (s
->kill_context
.send_sigkill
) {
4228 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
4229 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4231 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
4232 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4236 case SERVICE_FINAL_SIGTERM
:
4237 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4238 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
4239 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4240 } else if (s
->kill_context
.send_sigkill
) {
4241 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
4242 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4244 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
4245 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4250 case SERVICE_FINAL_SIGKILL
:
4251 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
4252 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
4255 case SERVICE_AUTO_RESTART
:
4256 if (s
->restart_usec
> 0)
4257 log_unit_debug(UNIT(s
),
4258 "Service restart interval %s expired, scheduling restart.",
4259 FORMAT_TIMESPAN(service_restart_usec_next(s
), USEC_PER_SEC
));
4261 log_unit_debug(UNIT(s
),
4262 "Service has no hold-off time (RestartSec=0), scheduling restart.");
4264 service_enter_restart(s
);
4267 case SERVICE_CLEANING
:
4268 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
4270 if (s
->clean_result
== SERVICE_SUCCESS
)
4271 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
4273 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
4277 assert_not_reached();
4283 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4284 Service
*s
= SERVICE(userdata
);
4285 usec_t watchdog_usec
;
4288 assert(source
== s
->watchdog_event_source
);
4290 watchdog_usec
= service_get_watchdog_usec(s
);
4292 if (UNIT(s
)->manager
->service_watchdogs
) {
4293 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
4294 FORMAT_TIMESPAN(watchdog_usec
, 1));
4296 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4298 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
4299 FORMAT_TIMESPAN(watchdog_usec
, 1));
4304 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
4307 NotifyAccess notify_access
= service_get_notify_access(s
);
4309 if (notify_access
== NOTIFY_NONE
) {
4310 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
4314 if (notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
4315 if (s
->main_pid
!= 0)
4316 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception only permitted for main PID "PID_FMT
, pid
, s
->main_pid
);
4318 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception only permitted for main PID which is currently not known", pid
);
4323 if (notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
4324 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
4325 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception only permitted for main PID "PID_FMT
" and control PID "PID_FMT
,
4326 pid
, s
->main_pid
, s
->control_pid
);
4327 else if (s
->main_pid
!= 0)
4328 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception only permitted for main PID "PID_FMT
, pid
, s
->main_pid
);
4329 else if (s
->control_pid
!= 0)
4330 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception only permitted for control PID "PID_FMT
, pid
, s
->control_pid
);
4332 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception only permitted for main PID and control PID which are currently not known", pid
);
4340 static void service_force_watchdog(Service
*s
) {
4341 if (!UNIT(s
)->manager
->service_watchdogs
)
4344 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
4345 s
->status_text
?: "<unset>");
4347 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4350 static void service_notify_message(
4352 const struct ucred
*ucred
,
4356 Service
*s
= SERVICE(u
);
4357 bool notify_dbus
= false;
4358 usec_t monotonic_usec
= USEC_INFINITY
;
4365 if (!service_notify_message_authorized(s
, ucred
->pid
, fds
))
4368 if (DEBUG_LOGGING
) {
4369 _cleanup_free_
char *cc
= NULL
;
4371 cc
= strv_join(tags
, ", ");
4372 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4375 /* Interpret MAINPID= */
4376 e
= strv_find_startswith(tags
, "MAINPID=");
4377 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
)) {
4380 if (parse_pid(e
, &new_main_pid
) < 0)
4381 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4382 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4384 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4386 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4388 if (ucred
->uid
== 0) {
4389 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, but we'll accept it as the request to change it came from a privileged process.", new_main_pid
);
4392 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4395 (void) service_set_main_pid(s
, new_main_pid
);
4397 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4399 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4406 /* Parse MONOTONIC_USEC= */
4407 e
= strv_find_startswith(tags
, "MONOTONIC_USEC=");
4409 r
= safe_atou64(e
, &monotonic_usec
);
4411 log_unit_warning_errno(u
, r
, "Failed to parse MONOTONIC_USEC= field in notification message, ignoring: %s", e
);
4414 /* Interpret READY=/STOPPING=/RELOADING=. STOPPING= wins over the others, and READY= over RELOADING= */
4415 if (strv_contains(tags
, "STOPPING=1")) {
4416 s
->notify_state
= NOTIFY_STOPPING
;
4418 if (IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
4419 service_enter_stop_by_notify(s
);
4423 } else if (strv_contains(tags
, "READY=1")) {
4425 s
->notify_state
= NOTIFY_READY
;
4427 /* Type=notify services inform us about completed initialization with READY=1 */
4428 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
4429 s
->state
== SERVICE_START
)
4430 service_enter_start_post(s
);
4432 /* Sending READY=1 while we are reloading informs us that the reloading is complete. */
4433 if (s
->state
== SERVICE_RELOAD_NOTIFY
)
4434 service_enter_running(s
, SERVICE_SUCCESS
);
4436 /* Combined RELOADING=1 and READY=1? Then this is indication that the service started and
4437 * immediately finished reloading. */
4438 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4439 strv_contains(tags
, "RELOADING=1") &&
4440 monotonic_usec
!= USEC_INFINITY
&&
4441 monotonic_usec
>= s
->reload_begin_usec
) {
4442 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
4444 /* Propagate a reload explicitly */
4445 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
4447 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload, ignoring: %s", bus_error_message(&error
, r
));
4449 service_enter_running(s
, SERVICE_SUCCESS
);
4454 } else if (strv_contains(tags
, "RELOADING=1")) {
4456 s
->notify_state
= NOTIFY_RELOADING
;
4458 /* Sending RELOADING=1 after we send SIGHUP to request a reload will transition
4459 * things to "reload-notify" state, where we'll wait for READY=1 to let us know the
4460 * reload is done. Note that we insist on a timestamp being sent along here, so that
4461 * we know for sure this is a reload cycle initiated *after* we sent the signal */
4462 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4463 monotonic_usec
!= USEC_INFINITY
&&
4464 monotonic_usec
>= s
->reload_begin_usec
)
4465 /* Note, we don't call service_enter_reload_by_notify() here, because we
4466 * don't need reload propagation nor do we want to restart the time-out. */
4467 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4469 if (s
->state
== SERVICE_RUNNING
)
4470 service_enter_reload_by_notify(s
);
4475 /* Interpret STATUS= */
4476 e
= strv_find_startswith(tags
, "STATUS=");
4478 _cleanup_free_
char *t
= NULL
;
4481 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4482 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4483 if (strlen(e
) > STATUS_TEXT_MAX
)
4484 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4485 else if (!utf8_is_valid(e
))
4486 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4494 if (!streq_ptr(s
->status_text
, t
)) {
4495 free_and_replace(s
->status_text
, t
);
4500 /* Interpret NOTIFYACCESS= */
4501 e
= strv_find_startswith(tags
, "NOTIFYACCESS=");
4503 NotifyAccess notify_access
;
4505 notify_access
= notify_access_from_string(e
);
4506 if (notify_access
< 0)
4507 log_unit_warning_errno(u
, notify_access
,
4508 "Failed to parse NOTIFYACCESS= field value '%s' in notification message, ignoring: %m", e
);
4510 /* We don't need to check whether the new access mode is more strict than what is
4511 * already in use, since only the privileged process is allowed to change it
4512 * in the first place. */
4513 if (service_get_notify_access(s
) != notify_access
) {
4514 service_override_notify_access(s
, notify_access
);
4519 /* Interpret ERRNO= */
4520 e
= strv_find_startswith(tags
, "ERRNO=");
4524 status_errno
= parse_errno(e
);
4525 if (status_errno
< 0)
4526 log_unit_warning_errno(u
, status_errno
,
4527 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4528 else if (s
->status_errno
!= status_errno
) {
4529 s
->status_errno
= status_errno
;
4534 /* Interpret EXTEND_TIMEOUT= */
4535 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4537 usec_t extend_timeout_usec
;
4538 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4539 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4541 service_extend_timeout(s
, extend_timeout_usec
);
4544 /* Interpret WATCHDOG= */
4545 e
= strv_find_startswith(tags
, "WATCHDOG=");
4548 service_reset_watchdog(s
);
4549 else if (streq(e
, "trigger"))
4550 service_force_watchdog(s
);
4552 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4555 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4557 usec_t watchdog_override_usec
;
4558 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4559 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4561 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4564 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4565 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4566 * fds, but optional when pushing in new fds, for compatibility reasons. */
4567 if (strv_contains(tags
, "FDSTOREREMOVE=1")) {
4570 name
= strv_find_startswith(tags
, "FDNAME=");
4571 if (!name
|| !fdname_is_valid(name
))
4572 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4574 service_remove_fd_store(s
, name
);
4576 } else if (strv_contains(tags
, "FDSTORE=1")) {
4579 name
= strv_find_startswith(tags
, "FDNAME=");
4580 if (name
&& !fdname_is_valid(name
)) {
4581 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4585 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4588 /* Notify clients about changed status or main pid */
4590 unit_add_to_dbus_queue(u
);
4593 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4594 Service
*s
= SERVICE(u
);
4598 if (!s
->timer_event_source
)
4601 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4604 if (t
== USEC_INFINITY
)
4611 static bool pick_up_pid_from_bus_name(Service
*s
) {
4614 /* If the service is running but we have no main PID yet, get it from the owner of the D-Bus name */
4616 return !pid_is_valid(s
->main_pid
) &&
4622 SERVICE_RELOAD_SIGNAL
,
4623 SERVICE_RELOAD_NOTIFY
);
4626 static int bus_name_pid_lookup_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*ret_error
) {
4627 const sd_bus_error
*e
;
4628 Unit
*u
= ASSERT_PTR(userdata
);
4636 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4638 if (!s
->bus_name
|| !pick_up_pid_from_bus_name(s
))
4641 e
= sd_bus_message_get_error(reply
);
4643 r
= sd_bus_error_get_errno(e
);
4644 log_warning_errno(r
, "GetConnectionUnixProcessID() failed: %s", bus_error_message(e
, r
));
4648 r
= sd_bus_message_read(reply
, "u", &pid
);
4650 bus_log_parse_error(r
);
4654 if (!pid_is_valid(pid
)) {
4655 log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "GetConnectionUnixProcessID() returned invalid PID");
4659 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, (pid_t
) pid
);
4661 (void) service_set_main_pid(s
, pid
);
4662 (void) unit_watch_pid(UNIT(s
), pid
, false);
4666 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4668 Service
*s
= SERVICE(u
);
4674 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4676 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4678 s
->bus_name_good
= new_owner
;
4680 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4681 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4683 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4687 if (s
->type
== SERVICE_DBUS
) {
4689 /* service_enter_running() will figure out what to
4691 if (s
->state
== SERVICE_RUNNING
)
4692 service_enter_running(s
, SERVICE_SUCCESS
);
4693 else if (s
->state
== SERVICE_START
&& new_owner
)
4694 service_enter_start_post(s
);
4696 } else if (new_owner
&& pick_up_pid_from_bus_name(s
)) {
4698 /* Try to acquire PID from bus service */
4700 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4702 r
= sd_bus_call_method_async(
4703 u
->manager
->api_bus
,
4704 &s
->bus_name_pid_lookup_slot
,
4705 "org.freedesktop.DBus",
4706 "/org/freedesktop/DBus",
4707 "org.freedesktop.DBus",
4708 "GetConnectionUnixProcessID",
4709 bus_name_pid_lookup_callback
,
4714 log_debug_errno(r
, "Failed to request owner PID of service name, ignoring: %m");
4718 int service_set_socket_fd(
4723 bool selinux_context_net
) {
4725 _cleanup_free_
char *peer_text
= NULL
;
4731 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4732 * to be configured. We take ownership of the passed fd on success. */
4734 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4737 if (s
->socket_fd
>= 0)
4740 assert(!s
->socket_peer
);
4742 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4745 if (getpeername_pretty(fd
, true, &peer_text
) >= 0) {
4747 if (UNIT(s
)->description
) {
4748 _cleanup_free_
char *a
= NULL
;
4750 a
= strjoin(UNIT(s
)->description
, " (", peer_text
, ")");
4754 r
= unit_set_description(UNIT(s
), a
);
4756 r
= unit_set_description(UNIT(s
), peer_text
);
4761 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4766 s
->socket_peer
= socket_peer_ref(peer
);
4767 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4769 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4773 static void service_reset_failed(Unit
*u
) {
4774 Service
*s
= SERVICE(u
);
4778 if (s
->state
== SERVICE_FAILED
)
4779 service_set_state(s
, service_determine_dead_state(s
));
4781 s
->result
= SERVICE_SUCCESS
;
4782 s
->reload_result
= SERVICE_SUCCESS
;
4783 s
->clean_result
= SERVICE_SUCCESS
;
4785 s
->flush_n_restarts
= false;
4788 static int service_kill(Unit
*u
, KillWho who
, int signo
, int code
, int value
, sd_bus_error
*error
) {
4789 Service
*s
= SERVICE(u
);
4793 return unit_kill_common(u
, who
, signo
, code
, value
, s
->main_pid
, s
->control_pid
, error
);
4796 static int service_main_pid(Unit
*u
) {
4797 Service
*s
= SERVICE(u
);
4804 static int service_control_pid(Unit
*u
) {
4805 Service
*s
= SERVICE(u
);
4809 return s
->control_pid
;
4812 static bool service_needs_console(Unit
*u
) {
4813 Service
*s
= SERVICE(u
);
4817 /* We provide our own implementation of this here, instead of relying of the generic implementation
4818 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4820 if (!exec_context_may_touch_console(&s
->exec_context
))
4823 return IN_SET(s
->state
,
4830 SERVICE_RELOAD_SIGNAL
,
4831 SERVICE_RELOAD_NOTIFY
,
4833 SERVICE_STOP_WATCHDOG
,
4834 SERVICE_STOP_SIGTERM
,
4835 SERVICE_STOP_SIGKILL
,
4837 SERVICE_FINAL_WATCHDOG
,
4838 SERVICE_FINAL_SIGTERM
,
4839 SERVICE_FINAL_SIGKILL
);
4842 static int service_exit_status(Unit
*u
) {
4843 Service
*s
= SERVICE(u
);
4847 if (s
->main_exec_status
.pid
<= 0 ||
4848 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4851 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4854 return s
->main_exec_status
.status
;
4857 static const char* service_status_text(Unit
*u
) {
4858 Service
*s
= SERVICE(u
);
4862 return s
->status_text
;
4865 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4866 _cleanup_strv_free_
char **l
= NULL
;
4867 bool may_clean_fdstore
= false;
4868 Service
*s
= SERVICE(u
);
4874 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4877 /* Determine if there's anything we could potentially clean */
4878 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4882 if (mask
& EXEC_CLEAN_FDSTORE
)
4883 may_clean_fdstore
= s
->n_fd_store
> 0 || s
->n_fd_store_max
> 0;
4885 if (strv_isempty(l
) && !may_clean_fdstore
)
4886 return -EUNATCH
; /* Nothing to potentially clean */
4888 /* Let's clean the stuff we can clean quickly */
4889 if (may_clean_fdstore
)
4890 service_release_fd_store(s
);
4892 /* If we are done, leave quickly */
4893 if (strv_isempty(l
)) {
4894 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4895 service_set_state(s
, SERVICE_DEAD
);
4899 /* We need to clean disk stuff. This is slow, hence do it out of process, and change state */
4900 service_unwatch_control_pid(s
);
4901 s
->clean_result
= SERVICE_SUCCESS
;
4902 s
->control_command
= NULL
;
4903 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4905 r
= service_arm_timer(s
, /* relative= */ true, s
->exec_context
.timeout_clean_usec
);
4909 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4913 service_set_state(s
, SERVICE_CLEANING
);
4918 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4919 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4920 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
4924 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4925 Service
*s
= SERVICE(u
);
4926 ExecCleanMask mask
= 0;
4932 r
= exec_context_get_clean_mask(&s
->exec_context
, &mask
);
4936 if (s
->n_fd_store_max
> 0)
4937 mask
|= EXEC_CLEAN_FDSTORE
;
4943 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4944 if (t
== JOB_START
&&
4945 result
== JOB_DONE
&&
4946 SERVICE(u
)->type
== SERVICE_ONESHOT
)
4947 return "Finished %s.";
4949 /* Fall back to generic */
4953 static int service_can_start(Unit
*u
) {
4954 Service
*s
= SERVICE(u
);
4959 /* Make sure we don't enter a busy loop of some kind. */
4960 r
= unit_test_start_limit(u
);
4962 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
4969 static void service_release_resources(Unit
*u
) {
4970 Service
*s
= SERVICE(ASSERT_PTR(u
));
4972 /* Invoked by the unit state engine, whenever it realizes that unit is dead and there's no job
4973 * anymore for it, and it hence is a good idea to release resources */
4975 /* Don't release resources if this is a transitionary failed/dead state
4976 * (i.e. SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART), insist on a permanent
4978 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
4981 log_unit_debug(u
, "Releasing resources...");
4983 service_release_socket_fd(s
);
4984 service_release_stdio_fd(s
);
4986 if (s
->fd_store_preserve_mode
!= EXEC_PRESERVE_YES
)
4987 service_release_fd_store(s
);
4989 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4990 service_set_state(s
, SERVICE_DEAD
);
4993 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4994 [SERVICE_RESTART_NO
] = "no",
4995 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4996 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4997 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4998 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4999 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
5000 [SERVICE_RESTART_ALWAYS
] = "always",
5003 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
5005 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
5006 [SERVICE_SIMPLE
] = "simple",
5007 [SERVICE_FORKING
] = "forking",
5008 [SERVICE_ONESHOT
] = "oneshot",
5009 [SERVICE_DBUS
] = "dbus",
5010 [SERVICE_NOTIFY
] = "notify",
5011 [SERVICE_NOTIFY_RELOAD
] = "notify-reload",
5012 [SERVICE_IDLE
] = "idle",
5013 [SERVICE_EXEC
] = "exec",
5016 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
5018 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
5019 [SERVICE_EXIT_MAIN
] = "main",
5020 [SERVICE_EXIT_CGROUP
] = "cgroup",
5023 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
5025 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5026 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
5027 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
5028 [SERVICE_EXEC_START
] = "ExecStart",
5029 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
5030 [SERVICE_EXEC_RELOAD
] = "ExecReload",
5031 [SERVICE_EXEC_STOP
] = "ExecStop",
5032 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
5035 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
5037 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5038 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
5039 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
5040 [SERVICE_EXEC_START
] = "ExecStartEx",
5041 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
5042 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
5043 [SERVICE_EXEC_STOP
] = "ExecStopEx",
5044 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
5047 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
5049 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
5050 [NOTIFY_UNKNOWN
] = "unknown",
5051 [NOTIFY_READY
] = "ready",
5052 [NOTIFY_RELOADING
] = "reloading",
5053 [NOTIFY_STOPPING
] = "stopping",
5056 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
5058 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
5059 [SERVICE_SUCCESS
] = "success",
5060 [SERVICE_FAILURE_RESOURCES
] = "resources",
5061 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
5062 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
5063 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
5064 [SERVICE_FAILURE_SIGNAL
] = "signal",
5065 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
5066 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
5067 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
5068 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
5069 [SERVICE_SKIP_CONDITION
] = "exec-condition",
5072 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
5074 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
5075 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
5076 [SERVICE_TIMEOUT_ABORT
] = "abort",
5077 [SERVICE_TIMEOUT_KILL
] = "kill",
5080 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
5082 const UnitVTable service_vtable
= {
5083 .object_size
= sizeof(Service
),
5084 .exec_context_offset
= offsetof(Service
, exec_context
),
5085 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
5086 .kill_context_offset
= offsetof(Service
, kill_context
),
5087 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
5093 .private_section
= "Service",
5095 .can_transient
= true,
5096 .can_delegate
= true,
5098 .can_set_managed_oom
= true,
5100 .init
= service_init
,
5101 .done
= service_done
,
5102 .load
= service_load
,
5103 .release_resources
= service_release_resources
,
5105 .coldplug
= service_coldplug
,
5107 .dump
= service_dump
,
5109 .start
= service_start
,
5110 .stop
= service_stop
,
5111 .reload
= service_reload
,
5113 .can_reload
= service_can_reload
,
5115 .kill
= service_kill
,
5116 .clean
= service_clean
,
5117 .can_clean
= service_can_clean
,
5119 .freeze
= unit_freeze_vtable_common
,
5120 .thaw
= unit_thaw_vtable_common
,
5122 .serialize
= service_serialize
,
5123 .deserialize_item
= service_deserialize_item
,
5125 .active_state
= service_active_state
,
5126 .sub_state_to_string
= service_sub_state_to_string
,
5128 .will_restart
= service_will_restart
,
5130 .may_gc
= service_may_gc
,
5132 .sigchld_event
= service_sigchld_event
,
5134 .reset_failed
= service_reset_failed
,
5136 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
5137 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
5138 .notify_message
= service_notify_message
,
5140 .main_pid
= service_main_pid
,
5141 .control_pid
= service_control_pid
,
5143 .bus_name_owner_change
= service_bus_name_owner_change
,
5145 .bus_set_property
= bus_service_set_property
,
5146 .bus_commit_properties
= bus_service_commit_properties
,
5148 .get_timeout
= service_get_timeout
,
5149 .needs_console
= service_needs_console
,
5150 .exit_status
= service_exit_status
,
5151 .status_text
= service_status_text
,
5153 .status_message_formats
= {
5154 .finished_start_job
= {
5155 [JOB_FAILED
] = "Failed to start %s.",
5157 .finished_stop_job
= {
5158 [JOB_DONE
] = "Stopped %s.",
5159 [JOB_FAILED
] = "Stopped (with error) %s.",
5161 .finished_job
= service_finished_job
,
5164 .can_start
= service_can_start
,