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 "missing_audit.h"
32 #include "open-file.h"
33 #include "parse-util.h"
34 #include "path-util.h"
35 #include "process-util.h"
36 #include "random-util.h"
37 #include "serialize.h"
39 #include "signal-util.h"
41 #include "stdio-util.h"
42 #include "string-table.h"
43 #include "string-util.h"
45 #include "unit-name.h"
49 #define service_spawn(...) service_spawn_internal(__func__, __VA_ARGS__)
51 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
52 [SERVICE_DEAD
] = UNIT_INACTIVE
,
53 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
54 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
55 [SERVICE_START
] = UNIT_ACTIVATING
,
56 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
57 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
58 [SERVICE_EXITED
] = UNIT_ACTIVE
,
59 [SERVICE_RELOAD
] = UNIT_RELOADING
,
60 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
61 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
62 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
63 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
64 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
65 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
66 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
67 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
68 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
69 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
70 [SERVICE_FAILED
] = UNIT_FAILED
,
71 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
72 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
73 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
74 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
75 [SERVICE_AUTO_RESTART_QUEUED
] = UNIT_ACTIVATING
,
76 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
79 /* For Type=idle we never want to delay any other jobs, hence we
80 * consider idle jobs active as soon as we start working on them */
81 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
82 [SERVICE_DEAD
] = UNIT_INACTIVE
,
83 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
84 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
85 [SERVICE_START
] = UNIT_ACTIVE
,
86 [SERVICE_START_POST
] = UNIT_ACTIVE
,
87 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
88 [SERVICE_EXITED
] = UNIT_ACTIVE
,
89 [SERVICE_RELOAD
] = UNIT_RELOADING
,
90 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
91 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
92 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
93 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
94 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
95 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
96 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
97 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
98 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
99 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
100 [SERVICE_FAILED
] = UNIT_FAILED
,
101 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
102 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
103 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
104 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
105 [SERVICE_AUTO_RESTART_QUEUED
] = UNIT_ACTIVATING
,
106 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
109 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
110 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
111 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
112 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
114 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
115 static void service_enter_reload_by_notify(Service
*s
);
117 static void service_init(Unit
*u
) {
118 Service
*s
= SERVICE(u
);
121 assert(u
->load_state
== UNIT_STUB
);
123 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
124 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
125 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
126 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
127 s
->restart_usec
= u
->manager
->default_restart_usec
;
128 s
->restart_max_delay_usec
= USEC_INFINITY
;
129 s
->runtime_max_usec
= USEC_INFINITY
;
130 s
->type
= _SERVICE_TYPE_INVALID
;
131 s
->socket_fd
= -EBADF
;
132 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -EBADF
;
133 s
->guess_main_pid
= true;
135 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
137 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
138 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
140 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
142 s
->watchdog_original_usec
= USEC_INFINITY
;
144 s
->oom_policy
= _OOM_POLICY_INVALID
;
145 s
->reload_begin_usec
= USEC_INFINITY
;
146 s
->reload_signal
= SIGHUP
;
148 s
->fd_store_preserve_mode
= EXEC_PRESERVE_RESTART
;
151 static void service_unwatch_control_pid(Service
*s
) {
154 if (s
->control_pid
<= 0)
157 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->control_pid
));
160 static void service_unwatch_main_pid(Service
*s
) {
163 if (s
->main_pid
<= 0)
166 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->main_pid
));
169 static void service_unwatch_pid_file(Service
*s
) {
170 if (!s
->pid_file_pathspec
)
173 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
174 path_spec_unwatch(s
->pid_file_pathspec
);
175 path_spec_done(s
->pid_file_pathspec
);
176 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
179 static int service_set_main_pid(Service
*s
, pid_t pid
) {
185 if (pid
== getpid_cached())
188 if (s
->main_pid
== pid
&& s
->main_pid_known
)
191 if (s
->main_pid
!= pid
) {
192 service_unwatch_main_pid(s
);
193 exec_status_start(&s
->main_exec_status
, pid
);
197 s
->main_pid_known
= true;
198 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
200 if (s
->main_pid_alien
)
201 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
206 void service_release_socket_fd(Service
*s
) {
209 if (s
->socket_fd
< 0 && !UNIT_ISSET(s
->accept_socket
) && !s
->socket_peer
)
212 log_unit_debug(UNIT(s
), "Closing connection socket.");
214 /* Undo the effect of service_set_socket_fd(). */
216 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
218 if (UNIT_ISSET(s
->accept_socket
)) {
219 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
220 unit_ref_unset(&s
->accept_socket
);
223 s
->socket_peer
= socket_peer_unref(s
->socket_peer
);
226 static void service_override_notify_access(Service
*s
, NotifyAccess notify_access_override
) {
229 s
->notify_access_override
= notify_access_override
;
231 log_unit_debug(UNIT(s
), "notify_access=%s", notify_access_to_string(s
->notify_access
));
232 log_unit_debug(UNIT(s
), "notify_access_override=%s", notify_access_to_string(s
->notify_access_override
));
235 static void service_stop_watchdog(Service
*s
) {
238 s
->watchdog_event_source
= sd_event_source_disable_unref(s
->watchdog_event_source
);
239 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
242 static void service_start_watchdog(Service
*s
) {
243 usec_t watchdog_usec
;
248 watchdog_usec
= service_get_watchdog_usec(s
);
249 if (!timestamp_is_set(watchdog_usec
)) {
250 service_stop_watchdog(s
);
254 if (s
->watchdog_event_source
) {
255 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
257 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
261 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
263 r
= sd_event_add_time(
264 UNIT(s
)->manager
->event
,
265 &s
->watchdog_event_source
,
267 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
268 service_dispatch_watchdog
, s
);
270 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
274 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
276 /* Let's process everything else which might be a sign
277 * of living before we consider a service died. */
278 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
281 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
284 usec_t
service_restart_usec_next(Service
*s
) {
285 unsigned n_restarts_next
;
290 /* When the service state is in SERVICE_*_BEFORE_AUTO_RESTART or SERVICE_AUTO_RESTART, we still need
291 * to add 1 to s->n_restarts manually, because s->n_restarts is not updated until a restart job is
292 * enqueued, i.e. state has transitioned to SERVICE_AUTO_RESTART_QUEUED. */
293 n_restarts_next
= s
->n_restarts
+ (s
->state
== SERVICE_AUTO_RESTART_QUEUED
? 0 : 1);
295 if (n_restarts_next
<= 1 ||
296 s
->restart_steps
== 0 ||
297 s
->restart_usec
== 0 ||
298 s
->restart_max_delay_usec
== USEC_INFINITY
||
299 s
->restart_usec
>= s
->restart_max_delay_usec
)
300 value
= s
->restart_usec
;
301 else if (n_restarts_next
> s
->restart_steps
)
302 value
= s
->restart_max_delay_usec
;
304 /* Enforced in service_verify() and above */
305 assert(s
->restart_max_delay_usec
> s
->restart_usec
);
307 /* r_i / r_0 = (r_n / r_0) ^ (i / n)
309 * r_0 : initial restart usec (s->restart_usec),
310 * r_i : i-th restart usec (value),
311 * r_n : maximum restart usec (s->restart_max_delay_usec),
312 * i : index of the next step (n_restarts_next - 1)
313 * n : num maximum steps (s->restart_steps) */
314 value
= s
->restart_usec
* powl((long double) s
->restart_max_delay_usec
/ s
->restart_usec
,
315 (long double) (n_restarts_next
- 1) / s
->restart_steps
);
318 log_unit_debug(UNIT(s
), "Next restart interval calculated as: %s", FORMAT_TIMESPAN(value
, 0));
322 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
328 /* Extends the specified event source timer to at least the specified time, unless it is already later
334 r
= sd_event_source_get_time(source
, ¤t
);
337 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
338 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
342 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
345 r
= sd_event_source_set_time(source
, extended
);
348 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
349 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for event source '%s', ignoring %m", strna(desc
));
353 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
358 if (!timestamp_is_set(extend_timeout_usec
))
361 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
363 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
364 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
367 static void service_reset_watchdog(Service
*s
) {
370 dual_timestamp_get(&s
->watchdog_timestamp
);
371 service_start_watchdog(s
);
374 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
377 s
->watchdog_override_enable
= true;
378 s
->watchdog_override_usec
= watchdog_override_usec
;
379 service_reset_watchdog(s
);
381 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
382 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
385 static ServiceFDStore
* service_fd_store_unlink(ServiceFDStore
*fs
) {
390 assert(fs
->service
->n_fd_store
> 0);
391 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
392 fs
->service
->n_fd_store
--;
395 sd_event_source_disable_unref(fs
->event_source
);
398 asynchronous_close(fs
->fd
);
402 DEFINE_TRIVIAL_CLEANUP_FUNC(ServiceFDStore
*, service_fd_store_unlink
);
404 static void service_release_fd_store(Service
*s
) {
410 log_unit_debug(UNIT(s
), "Releasing all stored fds");
413 service_fd_store_unlink(s
->fd_store
);
415 assert(s
->n_fd_store
== 0);
418 static void service_release_stdio_fd(Service
*s
) {
421 if (s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stdout_fd
< 0)
424 log_unit_debug(UNIT(s
), "Releasing stdin/stdout/stderr file descriptors.");
426 s
->stdin_fd
= asynchronous_close(s
->stdin_fd
);
427 s
->stdout_fd
= asynchronous_close(s
->stdout_fd
);
428 s
->stderr_fd
= asynchronous_close(s
->stderr_fd
);
430 static void service_done(Unit
*u
) {
431 Service
*s
= SERVICE(u
);
435 open_file_free_many(&s
->open_files
);
437 s
->pid_file
= mfree(s
->pid_file
);
438 s
->status_text
= mfree(s
->status_text
);
440 s
->exec_runtime
= exec_runtime_free(s
->exec_runtime
);
441 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
442 s
->control_command
= NULL
;
443 s
->main_command
= NULL
;
445 exit_status_set_free(&s
->restart_prevent_status
);
446 exit_status_set_free(&s
->restart_force_status
);
447 exit_status_set_free(&s
->success_status
);
449 /* This will leak a process, but at least no memory or any of
451 service_unwatch_main_pid(s
);
452 service_unwatch_control_pid(s
);
453 service_unwatch_pid_file(s
);
456 unit_unwatch_bus_name(u
, s
->bus_name
);
457 s
->bus_name
= mfree(s
->bus_name
);
460 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
462 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
463 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
465 service_stop_watchdog(s
);
467 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
468 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
470 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
472 service_release_socket_fd(s
);
473 service_release_stdio_fd(s
);
474 service_release_fd_store(s
);
477 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
478 ServiceFDStore
*fs
= ASSERT_PTR(userdata
);
482 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
483 log_unit_debug(UNIT(fs
->service
),
484 "Received %s on stored fd %d (%s), closing.",
485 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
486 fs
->fd
, strna(fs
->fdname
));
487 service_fd_store_unlink(fs
);
491 static int service_add_fd_store(Service
*s
, int fd_in
, const char *name
, bool do_poll
) {
492 _cleanup_(service_fd_store_unlinkp
) ServiceFDStore
*fs
= NULL
;
493 _cleanup_(asynchronous_closep
) int fd
= ASSERT_FD(fd_in
);
497 /* fd is always consumed even if the function fails. */
501 if (fstat(fd
, &st
) < 0)
504 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
);
506 if (s
->n_fd_store
>= s
->n_fd_store_max
)
507 /* Our store is full. Use this errno rather than E[NM]FILE to distinguish from the case
508 * where systemd itself hits the file limit. */
509 return log_unit_debug_errno(UNIT(s
), SYNTHETIC_ERRNO(EXFULL
), "Hit fd store limit.");
511 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
512 r
= same_fd(i
->fd
, fd
);
516 log_unit_debug(UNIT(s
), "Suppressing duplicate fd %i in fd store.", fd
);
517 return 0; /* fd already included */
521 fs
= new(ServiceFDStore
, 1);
525 *fs
= (ServiceFDStore
) {
528 .fdname
= strdup(name
?: "stored"),
535 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fs
->fd
, 0, on_fd_store_io
, fs
);
536 if (r
< 0 && r
!= -EPERM
) /* EPERM indicates fds that aren't pollable, which is OK */
539 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
543 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
546 log_unit_debug(UNIT(s
), "Added fd %i (%s) to fd store.", fs
->fd
, fs
->fdname
);
549 return 1; /* fd newly stored */
552 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
560 fd
= fdset_steal_first(fds
);
564 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
566 return log_unit_warning_errno(UNIT(s
), r
,
567 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
570 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
576 static void service_remove_fd_store(Service
*s
, const char *name
) {
580 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
581 if (!streq(fs
->fdname
, name
))
584 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
585 service_fd_store_unlink(fs
);
589 static usec_t
service_running_timeout(Service
*s
) {
594 if (s
->runtime_rand_extra_usec
!= 0) {
595 delta
= random_u64_range(s
->runtime_rand_extra_usec
);
596 log_unit_debug(UNIT(s
), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta
, USEC_PER_SEC
));
599 return usec_add(usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
,
600 s
->runtime_max_usec
),
604 static int service_arm_timer(Service
*s
, bool relative
, usec_t usec
) {
609 if (s
->timer_event_source
) {
610 r
= (relative
? sd_event_source_set_time_relative
: sd_event_source_set_time
)(s
->timer_event_source
, usec
);
614 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
617 if (usec
== USEC_INFINITY
)
620 r
= (relative
? sd_event_add_time_relative
: sd_event_add_time
)(
621 UNIT(s
)->manager
->event
,
622 &s
->timer_event_source
,
625 service_dispatch_timer
, s
);
629 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
634 static int service_verify(Service
*s
) {
636 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
638 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++)
639 LIST_FOREACH(command
, command
, s
->exec_command
[c
]) {
640 if (!path_is_absolute(command
->path
) && !filename_is_valid(command
->path
))
641 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
642 "Service %s= binary path \"%s\" is neither a valid executable name nor an absolute path. Refusing.",
644 service_exec_command_to_string(c
));
645 if (strv_isempty(command
->argv
))
646 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
647 "Service has an empty argv in %s=. Refusing.",
648 service_exec_command_to_string(c
));
651 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
] &&
652 UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
653 /* FailureAction= only makes sense if one of the start or stop commands is specified.
654 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
655 * either a command or SuccessAction= are required. */
657 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
659 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
])
660 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
662 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
663 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.");
665 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
)
666 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.");
668 if (s
->type
== SERVICE_ONESHOT
&&
669 !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
))
670 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.");
672 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
))
673 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has RestartForceExitStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
675 if (s
->type
== SERVICE_ONESHOT
&& s
->exit_type
== SERVICE_EXIT_CGROUP
)
676 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has ExitType=cgroup set, which isn't allowed for Type=oneshot services. Refusing.");
678 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
)
679 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.");
681 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
))
682 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.");
684 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
685 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
687 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
688 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
690 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
691 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
693 if (s
->runtime_max_usec
== USEC_INFINITY
&& s
->runtime_rand_extra_usec
!= 0)
694 log_unit_warning(UNIT(s
), "Service has RuntimeRandomizedExtraSec= setting, but no RuntimeMaxSec=. Ignoring.");
696 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& cg_unified() < CGROUP_UNIFIED_SYSTEMD
)
697 log_unit_warning(UNIT(s
), "Service has ExitType=cgroup set, but we are running with legacy cgroups v1, which might not work correctly. Continuing.");
699 if (s
->restart_max_delay_usec
== USEC_INFINITY
&& s
->restart_steps
> 0)
700 log_unit_warning(UNIT(s
), "Service has RestartSteps= but no RestartMaxDelaySec= setting. Ignoring.");
702 if (s
->restart_max_delay_usec
!= USEC_INFINITY
&& s
->restart_steps
== 0)
703 log_unit_warning(UNIT(s
), "Service has RestartMaxDelaySec= but no RestartSteps= setting. Ignoring.");
705 if (s
->restart_max_delay_usec
< s
->restart_usec
) {
706 log_unit_warning(UNIT(s
), "RestartMaxDelaySec= has a value smaller than RestartSec=, resetting RestartSec= to RestartMaxDelaySec=.");
707 s
->restart_usec
= s
->restart_max_delay_usec
;
713 static int service_add_default_dependencies(Service
*s
) {
718 if (!UNIT(s
)->default_dependencies
)
721 /* Add a number of automatic dependencies useful for the
722 * majority of services. */
724 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
725 /* First, pull in the really early boot stuff, and
726 * require it, so that we fail if we can't acquire
729 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
734 /* In the --user instance there's no sysinit.target,
735 * in that case require basic.target instead. */
737 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
742 /* Second, if the rest of the base system is in the same
743 * transaction, order us after it, but do not pull it in or
744 * even require it. */
745 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
749 /* Third, add us in for normal shutdown. */
750 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
754 /* Fourth, add generic dependencies */
755 return exec_context_add_default_dependencies(UNIT(s
), &s
->exec_context
);
758 static void service_fix_stdio(Service
*s
) {
761 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
762 * default value that is subject to automatic overriding triggered by other settings and an explicit
763 * choice the user can make. We don't distinguish between these cases currently. */
765 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
766 s
->exec_context
.stdin_data_size
> 0)
767 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
769 if (IN_SET(s
->exec_context
.std_input
,
771 EXEC_INPUT_TTY_FORCE
,
774 EXEC_INPUT_NAMED_FD
))
777 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
778 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
779 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
780 * duplicated for both input and output at the same time (since they then would cause a feedback
781 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
783 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
784 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
785 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
787 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
788 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
791 static int service_setup_bus_name(Service
*s
) {
796 /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */
800 if (s
->type
== SERVICE_DBUS
) {
801 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
803 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
805 /* We always want to be ordered against dbus.socket if both are in the transaction. */
806 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
808 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
811 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
813 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
815 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
820 static int service_add_extras(Service
*s
) {
825 if (s
->type
== _SERVICE_TYPE_INVALID
) {
826 /* Figure out a type automatically */
828 s
->type
= SERVICE_DBUS
;
829 else if (s
->exec_command
[SERVICE_EXEC_START
])
830 s
->type
= SERVICE_SIMPLE
;
832 s
->type
= SERVICE_ONESHOT
;
835 /* Oneshot services have disabled start timeout by default */
836 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
837 s
->timeout_start_usec
= USEC_INFINITY
;
839 service_fix_stdio(s
);
841 r
= unit_patch_contexts(UNIT(s
));
845 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
849 r
= unit_set_default_slice(UNIT(s
));
853 /* If the service needs the notify socket, let's enable it automatically. */
854 if (s
->notify_access
== NOTIFY_NONE
&&
855 (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) || s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
856 s
->notify_access
= NOTIFY_MAIN
;
858 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
859 * delegation is on, in that case it we assume the payload knows better what to do and can process
860 * things in a more focused way. */
861 if (s
->oom_policy
< 0)
862 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
864 /* Let the kernel do the killing if that's requested. */
865 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
867 r
= service_add_default_dependencies(s
);
871 r
= service_setup_bus_name(s
);
878 static int service_load(Unit
*u
) {
879 Service
*s
= SERVICE(u
);
882 r
= unit_load_fragment_and_dropin(u
, true);
886 if (u
->load_state
!= UNIT_LOADED
)
889 /* This is a new unit? Then let's add in some extras */
890 r
= service_add_extras(s
);
894 return service_verify(s
);
897 static void service_dump_fdstore(Service
*s
, FILE *f
, const char *prefix
) {
902 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
903 _cleanup_free_
char *path
= NULL
;
907 if (fstat(i
->fd
, &st
) < 0) {
908 log_debug_errno(errno
, "Failed to stat fdstore entry: %m");
912 flags
= fcntl(i
->fd
, F_GETFL
);
914 log_debug_errno(errno
, "Failed to get fdstore entry flags: %m");
918 (void) fd_get_path(i
->fd
, &path
);
921 "%s%s '%s' (type=%s; dev=" DEVNUM_FORMAT_STR
"; inode=%" PRIu64
"; rdev=" DEVNUM_FORMAT_STR
"; path=%s; access=%s)\n",
922 prefix
, i
== s
->fd_store
? "File Descriptor Store Entry:" : " ",
924 inode_type_to_string(st
.st_mode
),
925 DEVNUM_FORMAT_VAL(st
.st_dev
),
926 (uint64_t) st
.st_ino
,
927 DEVNUM_FORMAT_VAL(st
.st_rdev
),
929 accmode_to_string(flags
));
933 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
934 Service
*s
= SERVICE(u
);
939 prefix
= strempty(prefix
);
940 prefix2
= strjoina(prefix
, "\t");
943 "%sService State: %s\n"
945 "%sReload Result: %s\n"
946 "%sClean Result: %s\n"
947 "%sPermissionsStartOnly: %s\n"
948 "%sRootDirectoryStartOnly: %s\n"
949 "%sRemainAfterExit: %s\n"
950 "%sGuessMainPID: %s\n"
953 "%sNotifyAccess: %s\n"
954 "%sNotifyState: %s\n"
956 "%sReloadSignal: %s\n",
957 prefix
, service_state_to_string(s
->state
),
958 prefix
, service_result_to_string(s
->result
),
959 prefix
, service_result_to_string(s
->reload_result
),
960 prefix
, service_result_to_string(s
->clean_result
),
961 prefix
, yes_no(s
->permissions_start_only
),
962 prefix
, yes_no(s
->root_directory_start_only
),
963 prefix
, yes_no(s
->remain_after_exit
),
964 prefix
, yes_no(s
->guess_main_pid
),
965 prefix
, service_type_to_string(s
->type
),
966 prefix
, service_restart_to_string(s
->restart
),
967 prefix
, notify_access_to_string(service_get_notify_access(s
)),
968 prefix
, notify_state_to_string(s
->notify_state
),
969 prefix
, oom_policy_to_string(s
->oom_policy
),
970 prefix
, signal_to_string(s
->reload_signal
));
972 if (s
->control_pid
> 0)
974 "%sControl PID: "PID_FMT
"\n",
975 prefix
, s
->control_pid
);
979 "%sMain PID: "PID_FMT
"\n"
980 "%sMain PID Known: %s\n"
981 "%sMain PID Alien: %s\n",
983 prefix
, yes_no(s
->main_pid_known
),
984 prefix
, yes_no(s
->main_pid_alien
));
989 prefix
, s
->pid_file
);
994 "%sBus Name Good: %s\n",
996 prefix
, yes_no(s
->bus_name_good
));
998 if (UNIT_ISSET(s
->accept_socket
))
1000 "%sAccept Socket: %s\n",
1001 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
1004 "%sRestartSec: %s\n"
1005 "%sRestartSteps: %u\n"
1006 "%sRestartMaxDelaySec: %s\n"
1007 "%sTimeoutStartSec: %s\n"
1008 "%sTimeoutStopSec: %s\n"
1009 "%sTimeoutStartFailureMode: %s\n"
1010 "%sTimeoutStopFailureMode: %s\n",
1011 prefix
, FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
),
1012 prefix
, s
->restart_steps
,
1013 prefix
, FORMAT_TIMESPAN(s
->restart_max_delay_usec
, USEC_PER_SEC
),
1014 prefix
, FORMAT_TIMESPAN(s
->timeout_start_usec
, USEC_PER_SEC
),
1015 prefix
, FORMAT_TIMESPAN(s
->timeout_stop_usec
, USEC_PER_SEC
),
1016 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
1017 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
1019 if (s
->timeout_abort_set
)
1021 "%sTimeoutAbortSec: %s\n",
1022 prefix
, FORMAT_TIMESPAN(s
->timeout_abort_usec
, USEC_PER_SEC
));
1025 "%sRuntimeMaxSec: %s\n"
1026 "%sRuntimeRandomizedExtraSec: %s\n"
1027 "%sWatchdogSec: %s\n",
1028 prefix
, FORMAT_TIMESPAN(s
->runtime_max_usec
, USEC_PER_SEC
),
1029 prefix
, FORMAT_TIMESPAN(s
->runtime_rand_extra_usec
, USEC_PER_SEC
),
1030 prefix
, FORMAT_TIMESPAN(s
->watchdog_usec
, USEC_PER_SEC
));
1032 kill_context_dump(&s
->kill_context
, f
, prefix
);
1033 exec_context_dump(&s
->exec_context
, f
, prefix
);
1035 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
1036 if (!s
->exec_command
[c
])
1039 fprintf(f
, "%s-> %s:\n",
1040 prefix
, service_exec_command_to_string(c
));
1042 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
1046 fprintf(f
, "%sStatus Text: %s\n",
1047 prefix
, s
->status_text
);
1049 if (s
->n_fd_store_max
> 0)
1051 "%sFile Descriptor Store Max: %u\n"
1052 "%sFile Descriptor Store Pin: %s\n"
1053 "%sFile Descriptor Store Current: %zu\n",
1054 prefix
, s
->n_fd_store_max
,
1055 prefix
, exec_preserve_mode_to_string(s
->fd_store_preserve_mode
),
1056 prefix
, s
->n_fd_store
);
1058 service_dump_fdstore(s
, f
, prefix
);
1061 LIST_FOREACH(open_files
, of
, s
->open_files
) {
1062 _cleanup_free_
char *ofs
= NULL
;
1065 r
= open_file_to_string(of
, &ofs
);
1068 "Failed to convert OpenFile= setting to string, ignoring: %m");
1072 fprintf(f
, "%sOpen File: %s\n", prefix
, ofs
);
1075 cgroup_context_dump(UNIT(s
), f
, prefix
);
1078 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
1082 assert(pid_is_valid(pid
));
1084 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
1085 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
1088 if (pid
== getpid_cached() || pid
== 1)
1089 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
1091 if (pid
== s
->control_pid
)
1092 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
1094 if (!pid_is_alive(pid
))
1095 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
1097 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
1098 if (owner
== UNIT(s
)) {
1099 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
1100 return 1; /* Yay, it's definitely a good PID */
1103 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
1106 static int service_load_pid_file(Service
*s
, bool may_warn
) {
1107 bool questionable_pid_file
= false;
1108 _cleanup_free_
char *k
= NULL
;
1109 _cleanup_close_
int fd
= -EBADF
;
1118 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
1120 r
= chase(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
1121 if (r
== -ENOLINK
) {
1122 log_unit_debug_errno(UNIT(s
), r
,
1123 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
1125 questionable_pid_file
= true;
1127 r
= chase(s
->pid_file
, NULL
, 0, NULL
, &fd
);
1130 return log_unit_full_errno(UNIT(s
), prio
, r
,
1131 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
1133 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
1134 * chase() returned us into a proper fd first. */
1135 r
= read_one_line_file(FORMAT_PROC_FD_PATH(fd
), &k
);
1137 return log_unit_error_errno(UNIT(s
), r
,
1138 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
1141 r
= parse_pid(k
, &pid
);
1143 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
1145 if (s
->main_pid_known
&& pid
== s
->main_pid
)
1148 r
= service_is_suitable_main_pid(s
, pid
, prio
);
1154 if (questionable_pid_file
)
1155 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1156 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1158 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1160 if (fstat(fd
, &st
) < 0)
1161 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1164 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1165 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
1167 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
);
1170 if (s
->main_pid_known
) {
1171 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1173 service_unwatch_main_pid(s
);
1174 s
->main_pid_known
= false;
1176 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1178 r
= service_set_main_pid(s
, pid
);
1182 r
= unit_watch_pid(UNIT(s
), pid
, false);
1183 if (r
< 0) /* FIXME: we need to do something here */
1184 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1189 static void service_search_main_pid(Service
*s
) {
1195 /* If we know it anyway, don't ever fall back to unreliable
1197 if (s
->main_pid_known
)
1200 if (!s
->guess_main_pid
)
1203 assert(s
->main_pid
<= 0);
1205 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1208 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1209 if (service_set_main_pid(s
, pid
) < 0)
1212 r
= unit_watch_pid(UNIT(s
), pid
, false);
1214 /* FIXME: we need to do something here */
1215 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1218 static void service_set_state(Service
*s
, ServiceState state
) {
1219 ServiceState old_state
;
1220 const UnitActiveState
*table
;
1224 if (s
->state
!= state
)
1225 bus_unit_send_pending_change_signal(UNIT(s
), false);
1227 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1229 old_state
= s
->state
;
1232 service_unwatch_pid_file(s
);
1235 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1237 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1238 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1239 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1240 SERVICE_AUTO_RESTART
,
1242 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1245 SERVICE_START
, SERVICE_START_POST
,
1247 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1248 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1249 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1250 service_unwatch_main_pid(s
);
1251 s
->main_command
= NULL
;
1255 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1256 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1257 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1258 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1259 SERVICE_CLEANING
)) {
1260 service_unwatch_control_pid(s
);
1261 s
->control_command
= NULL
;
1262 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1266 SERVICE_DEAD
, SERVICE_FAILED
,
1267 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
,
1268 SERVICE_DEAD_RESOURCES_PINNED
)) {
1269 unit_unwatch_all_pids(UNIT(s
));
1270 unit_dequeue_rewatch_pids(UNIT(s
));
1273 if (state
!= SERVICE_START
)
1274 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
1276 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1277 service_stop_watchdog(s
);
1279 /* For the inactive states unit_notify() will trim the cgroup,
1280 * but for exit we have to do that ourselves... */
1281 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1282 unit_prune_cgroup(UNIT(s
));
1284 if (old_state
!= state
)
1285 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1287 unit_notify(UNIT(s
), table
[old_state
], table
[state
], s
->reload_result
== SERVICE_SUCCESS
);
1290 static usec_t
service_coldplug_timeout(Service
*s
) {
1293 switch (s
->deserialized_state
) {
1295 case SERVICE_CONDITION
:
1296 case SERVICE_START_PRE
:
1298 case SERVICE_START_POST
:
1299 case SERVICE_RELOAD
:
1300 case SERVICE_RELOAD_SIGNAL
:
1301 case SERVICE_RELOAD_NOTIFY
:
1302 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1304 case SERVICE_RUNNING
:
1305 return service_running_timeout(s
);
1308 case SERVICE_STOP_SIGTERM
:
1309 case SERVICE_STOP_SIGKILL
:
1310 case SERVICE_STOP_POST
:
1311 case SERVICE_FINAL_SIGTERM
:
1312 case SERVICE_FINAL_SIGKILL
:
1313 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1315 case SERVICE_STOP_WATCHDOG
:
1316 case SERVICE_FINAL_WATCHDOG
:
1317 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1319 case SERVICE_AUTO_RESTART
:
1320 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, service_restart_usec_next(s
));
1322 case SERVICE_CLEANING
:
1323 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1326 return USEC_INFINITY
;
1330 static int service_coldplug(Unit
*u
) {
1331 Service
*s
= SERVICE(u
);
1335 assert(s
->state
== SERVICE_DEAD
);
1337 if (s
->deserialized_state
== s
->state
)
1340 r
= service_arm_timer(s
, /* relative= */ false, service_coldplug_timeout(s
));
1344 if (s
->main_pid
> 0 &&
1345 pid_is_unwaited(s
->main_pid
) &&
1346 (IN_SET(s
->deserialized_state
,
1347 SERVICE_START
, SERVICE_START_POST
,
1349 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1350 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1351 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1352 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1357 if (s
->control_pid
> 0 &&
1358 pid_is_unwaited(s
->control_pid
) &&
1359 IN_SET(s
->deserialized_state
,
1360 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1361 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1362 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1363 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1364 SERVICE_CLEANING
)) {
1365 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1370 if (!IN_SET(s
->deserialized_state
,
1371 SERVICE_DEAD
, SERVICE_FAILED
,
1372 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
,
1374 SERVICE_DEAD_RESOURCES_PINNED
)) {
1375 (void) unit_enqueue_rewatch_pids(u
);
1376 (void) unit_setup_exec_runtime(u
);
1379 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1380 service_start_watchdog(s
);
1382 if (UNIT_ISSET(s
->accept_socket
)) {
1383 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1385 if (socket
->max_connections_per_source
> 0) {
1388 /* Make a best-effort attempt at bumping the connection count */
1389 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1390 socket_peer_unref(s
->socket_peer
);
1391 s
->socket_peer
= peer
;
1396 service_set_state(s
, s
->deserialized_state
);
1400 static int service_collect_fds(
1404 size_t *n_socket_fds
,
1405 size_t *n_storage_fds
) {
1407 _cleanup_strv_free_
char **rfd_names
= NULL
;
1408 _cleanup_free_
int *rfds
= NULL
;
1409 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1415 assert(n_socket_fds
);
1416 assert(n_storage_fds
);
1418 if (s
->socket_fd
>= 0) {
1420 /* Pass the per-connection socket */
1422 rfds
= newdup(int, &s
->socket_fd
, 1);
1426 rfd_names
= strv_new("connection");
1434 /* Pass all our configured sockets for singleton services */
1436 UNIT_FOREACH_DEPENDENCY(u
, UNIT(s
), UNIT_ATOM_TRIGGERED_BY
) {
1437 _cleanup_free_
int *cfds
= NULL
;
1441 if (u
->type
!= UNIT_SOCKET
)
1446 cn_fds
= socket_collect_fds(sock
, &cfds
);
1454 rfds
= TAKE_PTR(cfds
);
1455 rn_socket_fds
= cn_fds
;
1459 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1463 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1466 rn_socket_fds
+= cn_fds
;
1469 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1475 if (s
->n_fd_store
> 0) {
1480 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1486 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1491 n_fds
= rn_socket_fds
;
1493 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1494 rfds
[n_fds
] = fs
->fd
;
1495 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1496 if (!rfd_names
[n_fds
])
1503 rfd_names
[n_fds
] = NULL
;
1506 *fds
= TAKE_PTR(rfds
);
1507 *fd_names
= TAKE_PTR(rfd_names
);
1508 *n_socket_fds
= rn_socket_fds
;
1509 *n_storage_fds
= rn_storage_fds
;
1514 static int service_allocate_exec_fd_event_source(
1517 sd_event_source
**ret_event_source
) {
1519 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1524 assert(ret_event_source
);
1526 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1528 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1530 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1532 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1534 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1536 (void) sd_event_source_set_description(source
, "service exec_fd");
1538 r
= sd_event_source_set_io_fd_own(source
, true);
1540 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1542 *ret_event_source
= TAKE_PTR(source
);
1546 static int service_allocate_exec_fd(
1548 sd_event_source
**ret_event_source
,
1551 _cleanup_close_pair_
int p
[] = PIPE_EBADF
;
1555 assert(ret_event_source
);
1556 assert(ret_exec_fd
);
1558 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1559 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1561 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1566 *ret_exec_fd
= TAKE_FD(p
[1]);
1571 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1574 /* Notifications are accepted depending on the process and
1575 * the access setting of the service:
1576 * process: \ access: NONE MAIN EXEC ALL
1577 * main no yes yes yes
1578 * control no no yes yes
1579 * other (forked) no no no yes */
1581 if (flags
& EXEC_IS_CONTROL
)
1582 /* A control process */
1583 return IN_SET(service_get_notify_access(s
), NOTIFY_EXEC
, NOTIFY_ALL
);
1585 /* We only spawn main processes and control processes, so any
1586 * process that is not a control process is a main process */
1587 return service_get_notify_access(s
) != NOTIFY_NONE
;
1590 static Service
*service_get_triggering_service(Service
*s
) {
1591 Unit
*candidate
= NULL
, *other
;
1595 /* Return the service which triggered service 's', this means dependency
1596 * types which include the UNIT_ATOM_ON_{FAILURE,SUCCESS}_OF atoms.
1598 * N.B. if there are multiple services which could trigger 's' via OnFailure=
1599 * or OnSuccess= then we return NULL. This is since we don't know from which
1600 * one to propagate the exit status. */
1602 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_FAILURE_OF
) {
1608 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_SUCCESS_OF
) {
1614 return SERVICE(candidate
);
1617 log_unit_warning(UNIT(s
), "multiple trigger source candidates for exit status propagation (%s, %s), skipping.",
1618 candidate
->id
, other
->id
);
1622 static int service_spawn_internal(
1630 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1633 .stdout_fd
= -EBADF
,
1634 .stderr_fd
= -EBADF
,
1637 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1638 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1648 log_unit_debug(UNIT(s
), "Will spawn child (%s): %s", caller
, c
->path
);
1650 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1654 assert(!s
->exec_fd_event_source
);
1656 if (flags
& EXEC_IS_CONTROL
) {
1657 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1658 if (s
->permissions_start_only
)
1659 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1660 if (s
->root_directory_start_only
)
1661 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1664 if ((flags
& EXEC_PASS_FDS
) ||
1665 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1666 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1667 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1669 r
= service_collect_fds(s
,
1671 &exec_params
.fd_names
,
1672 &exec_params
.n_socket_fds
,
1673 &exec_params
.n_storage_fds
);
1677 exec_params
.open_files
= s
->open_files
;
1679 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1682 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1683 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1688 r
= service_arm_timer(s
, /* relative= */ true, timeout
);
1692 our_env
= new0(char*, 13);
1696 if (service_exec_needs_notify_socket(s
, flags
)) {
1697 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1700 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1702 if (s
->n_fd_store_max
> 0)
1703 if (asprintf(our_env
+ n_env
++, "FDSTORE=%u", s
->n_fd_store_max
) < 0)
1707 if (s
->main_pid
> 0)
1708 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1711 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1712 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1716 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1719 if (s
->socket_fd
>= 0) {
1720 union sockaddr_union sa
;
1721 socklen_t salen
= sizeof(sa
);
1723 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1724 * useful. Note that we do this only when we are still connected at this point in time, which we might
1725 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1726 * in ENOTCONN), and just use whate we can use. */
1728 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1729 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1730 _cleanup_free_
char *addr
= NULL
;
1734 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1738 t
= strjoin("REMOTE_ADDR=", addr
);
1741 our_env
[n_env
++] = t
;
1743 r
= sockaddr_port(&sa
.sa
, &port
);
1747 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1749 our_env
[n_env
++] = t
;
1753 Service
*env_source
= NULL
;
1754 const char *monitor_prefix
;
1755 if (flags
& EXEC_SETENV_RESULT
) {
1757 monitor_prefix
= "";
1758 } else if (flags
& EXEC_SETENV_MONITOR_RESULT
) {
1759 env_source
= service_get_triggering_service(s
);
1760 monitor_prefix
= "MONITOR_";
1764 if (asprintf(our_env
+ n_env
++, "%sSERVICE_RESULT=%s", monitor_prefix
, service_result_to_string(env_source
->result
)) < 0)
1767 if (env_source
->main_exec_status
.pid
> 0 &&
1768 dual_timestamp_is_set(&env_source
->main_exec_status
.exit_timestamp
)) {
1769 if (asprintf(our_env
+ n_env
++, "%sEXIT_CODE=%s", monitor_prefix
, sigchld_code_to_string(env_source
->main_exec_status
.code
)) < 0)
1772 if (env_source
->main_exec_status
.code
== CLD_EXITED
)
1773 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%i", monitor_prefix
, env_source
->main_exec_status
.status
);
1775 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%s", monitor_prefix
, signal_to_string(env_source
->main_exec_status
.status
));
1781 if (env_source
!= s
) {
1782 if (!sd_id128_is_null(UNIT(env_source
)->invocation_id
)) {
1783 r
= asprintf(our_env
+ n_env
++, "%sINVOCATION_ID=" SD_ID128_FORMAT_STR
,
1784 monitor_prefix
, SD_ID128_FORMAT_VAL(UNIT(env_source
)->invocation_id
));
1789 if (asprintf(our_env
+ n_env
++, "%sUNIT=%s", monitor_prefix
, UNIT(env_source
)->id
) < 0)
1794 if (UNIT(s
)->activation_details
) {
1795 r
= activation_details_append_env(UNIT(s
)->activation_details
, &our_env
);
1798 /* The number of env vars added here can vary, rather than keeping the allocation block in
1799 * sync manually, these functions simply use the strv methods to append to it, so we need
1800 * to update n_env when we are done in case of future usage. */
1804 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1808 final_env
= strv_env_merge(exec_params
.environment
, our_env
);
1812 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1813 SET_FLAG(exec_params
.flags
, EXEC_NSS_DYNAMIC_BYPASS
,
1814 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1816 strv_free_and_replace(exec_params
.environment
, final_env
);
1817 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1818 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1819 if (s
->type
== SERVICE_IDLE
)
1820 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1821 exec_params
.stdin_fd
= s
->stdin_fd
;
1822 exec_params
.stdout_fd
= s
->stdout_fd
;
1823 exec_params
.stderr_fd
= s
->stderr_fd
;
1825 r
= exec_spawn(UNIT(s
),
1835 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1836 s
->exec_fd_hot
= false;
1838 r
= unit_watch_pid(UNIT(s
), pid
, true);
1847 static int main_pid_good(Service
*s
) {
1850 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1852 /* If we know the pid file, then let's just check if it is
1854 if (s
->main_pid_known
) {
1856 /* If it's an alien child let's check if it is still
1858 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1859 return pid_is_alive(s
->main_pid
);
1861 /* .. otherwise assume we'll get a SIGCHLD for it,
1862 * which we really should wait for to collect exit
1863 * status and code */
1864 return s
->main_pid
> 0;
1867 /* We don't know the pid */
1871 static int control_pid_good(Service
*s
) {
1874 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1875 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1876 * means: we can't figure it out. */
1878 return s
->control_pid
> 0;
1881 static int cgroup_good(Service
*s
) {
1886 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1889 if (!UNIT(s
)->cgroup_path
)
1892 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1899 static bool service_shall_restart(Service
*s
, const char **reason
) {
1902 /* Don't restart after manual stops */
1903 if (s
->forbid_restart
) {
1904 *reason
= "manual stop";
1908 /* Never restart if this is configured as special exception */
1909 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1910 *reason
= "prevented by exit status";
1914 /* Restart if the exit code/status are configured as restart triggers */
1915 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1916 *reason
= "forced by exit status";
1920 *reason
= "restart setting";
1921 switch (s
->restart
) {
1923 case SERVICE_RESTART_NO
:
1926 case SERVICE_RESTART_ALWAYS
:
1927 return s
->result
!= SERVICE_SKIP_CONDITION
;
1929 case SERVICE_RESTART_ON_SUCCESS
:
1930 return s
->result
== SERVICE_SUCCESS
;
1932 case SERVICE_RESTART_ON_FAILURE
:
1933 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1935 case SERVICE_RESTART_ON_ABNORMAL
:
1936 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1938 case SERVICE_RESTART_ON_WATCHDOG
:
1939 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1941 case SERVICE_RESTART_ON_ABORT
:
1942 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1945 assert_not_reached();
1949 static bool service_will_restart(Unit
*u
) {
1950 Service
*s
= SERVICE(u
);
1954 if (IN_SET(s
->state
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
))
1957 return unit_will_restart_default(u
);
1960 static ServiceState
service_determine_dead_state(Service
*s
) {
1963 return s
->fd_store
&& s
->fd_store_preserve_mode
== EXEC_PRESERVE_YES
? SERVICE_DEAD_RESOURCES_PINNED
: SERVICE_DEAD
;
1966 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1967 ServiceState end_state
, restart_state
;
1972 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1973 * undo what has already been enqueued. */
1974 if (unit_stop_pending(UNIT(s
)))
1975 allow_restart
= false;
1977 if (s
->result
== SERVICE_SUCCESS
)
1980 if (s
->result
== SERVICE_SUCCESS
) {
1981 unit_log_success(UNIT(s
));
1982 end_state
= service_determine_dead_state(s
);
1983 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1984 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1985 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1986 end_state
= service_determine_dead_state(s
);
1987 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1989 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1990 end_state
= SERVICE_FAILED
;
1991 restart_state
= SERVICE_FAILED_BEFORE_AUTO_RESTART
;
1993 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1996 log_unit_debug(UNIT(s
), "Service restart not allowed.");
2000 allow_restart
= service_shall_restart(s
, &reason
);
2001 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
2002 allow_restart
? "" : "not ",
2006 if (allow_restart
) {
2007 /* We make two state changes here: one that maps to the high-level UNIT_INACTIVE/UNIT_FAILED
2008 * state (i.e. a state indicating deactivation), and then one that that maps to the
2009 * high-level UNIT_STARTING state (i.e. a state indicating activation). We do this so that
2010 * external software can watch the state changes and see all service failures, even if they
2011 * are only transitionary and followed by an automatic restart. We have fine-grained
2012 * low-level states for this though so that software can distinguish the permanent UNIT_INACTIVE
2013 * state from this transitionary UNIT_INACTIVE state by looking at the low-level states. */
2014 service_set_state(s
, restart_state
);
2016 r
= service_arm_timer(s
, /* relative= */ true, service_restart_usec_next(s
));
2020 service_set_state(s
, SERVICE_AUTO_RESTART
);
2022 service_set_state(s
, end_state
);
2024 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
2025 * user can still introspect the counter. Do so on the next start. */
2026 s
->flush_n_restarts
= true;
2029 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
2030 * queue, so that the fd store is possibly gc'ed again */
2031 unit_add_to_gc_queue(UNIT(s
));
2033 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
2034 s
->forbid_restart
= false;
2036 /* Reset NotifyAccess override */
2037 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2039 /* We want fresh tmpdirs and ephemeral snapshots in case the service is started again immediately. */
2040 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2042 /* Also, remove the runtime directory */
2043 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2045 /* Also get rid of the fd store, if that's configured. */
2046 if (s
->fd_store_preserve_mode
== EXEC_PRESERVE_NO
)
2047 service_release_fd_store(s
);
2049 /* Get rid of the IPC bits of the user */
2050 unit_unref_uid_gid(UNIT(s
), true);
2052 /* Try to delete the pid file. At this point it will be
2053 * out-of-date, and some software might be confused by it, so
2054 * let's remove it. */
2056 (void) unlink(s
->pid_file
);
2058 /* Reset TTY ownership if necessary */
2059 exec_context_revert_tty(&s
->exec_context
);
2064 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
2065 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2068 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
2072 if (s
->result
== SERVICE_SUCCESS
)
2075 service_unwatch_control_pid(s
);
2076 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2078 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
2079 if (s
->control_command
) {
2080 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
2082 r
= service_spawn(s
,
2084 s
->timeout_stop_usec
,
2085 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2090 service_set_state(s
, SERVICE_STOP_POST
);
2092 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
2097 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
2098 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2101 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
2104 case SERVICE_STOP_WATCHDOG
:
2105 case SERVICE_FINAL_WATCHDOG
:
2106 return KILL_WATCHDOG
;
2108 case SERVICE_STOP_SIGTERM
:
2109 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
2110 return KILL_RESTART
;
2113 case SERVICE_FINAL_SIGTERM
:
2114 return KILL_TERMINATE
;
2116 case SERVICE_STOP_SIGKILL
:
2117 case SERVICE_FINAL_SIGKILL
:
2121 return _KILL_OPERATION_INVALID
;
2125 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
2126 int kill_operation
, r
;
2130 if (s
->result
== SERVICE_SUCCESS
)
2133 /* Before sending any signal, make sure we track all members of this cgroup */
2134 (void) unit_watch_all_pids(UNIT(s
));
2136 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
2138 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2140 kill_operation
= state_to_kill_operation(s
, state
);
2141 r
= unit_kill_context(
2152 r
= service_arm_timer(s
, /* relative= */ true,
2153 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
);
2157 service_set_state(s
, state
);
2158 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
2159 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
2160 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2161 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2162 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
2163 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2165 service_enter_dead(s
, SERVICE_SUCCESS
, true);
2170 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2172 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2173 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
2175 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2178 static void service_enter_stop_by_notify(Service
*s
) {
2181 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2183 service_arm_timer(s
, /* relative= */ true, s
->timeout_stop_usec
);
2185 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
2186 service_set_state(s
, SERVICE_STOP_SIGTERM
);
2189 static void service_enter_stop(Service
*s
, ServiceResult f
) {
2194 if (s
->result
== SERVICE_SUCCESS
)
2197 service_unwatch_control_pid(s
);
2198 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2200 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
2201 if (s
->control_command
) {
2202 s
->control_command_id
= SERVICE_EXEC_STOP
;
2204 r
= service_spawn(s
,
2206 s
->timeout_stop_usec
,
2207 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2212 service_set_state(s
, SERVICE_STOP
);
2214 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2219 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
2220 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2223 static bool service_good(Service
*s
) {
2227 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
2230 main_pid_ok
= main_pid_good(s
);
2231 if (main_pid_ok
> 0) /* It's alive */
2233 if (main_pid_ok
== 0) /* It's dead */
2236 /* OK, we don't know anything about the main PID, maybe
2237 * because there is none. Let's check the control group
2240 return cgroup_good(s
) != 0;
2243 static void service_enter_running(Service
*s
, ServiceResult f
) {
2246 if (s
->result
== SERVICE_SUCCESS
)
2249 service_unwatch_control_pid(s
);
2251 if (s
->result
!= SERVICE_SUCCESS
)
2252 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2253 else if (service_good(s
)) {
2255 /* If there are any queued up sd_notify() notifications, process them now */
2256 if (s
->notify_state
== NOTIFY_RELOADING
)
2257 service_enter_reload_by_notify(s
);
2258 else if (s
->notify_state
== NOTIFY_STOPPING
)
2259 service_enter_stop_by_notify(s
);
2261 service_set_state(s
, SERVICE_RUNNING
);
2262 service_arm_timer(s
, /* relative= */ false, service_running_timeout(s
));
2265 } else if (s
->remain_after_exit
)
2266 service_set_state(s
, SERVICE_EXITED
);
2268 service_enter_stop(s
, SERVICE_SUCCESS
);
2271 static void service_enter_start_post(Service
*s
) {
2275 service_unwatch_control_pid(s
);
2276 service_reset_watchdog(s
);
2278 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2279 if (s
->control_command
) {
2280 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2282 r
= service_spawn(s
,
2284 s
->timeout_start_usec
,
2285 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2290 service_set_state(s
, SERVICE_START_POST
);
2292 service_enter_running(s
, SERVICE_SUCCESS
);
2297 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2298 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2301 static void service_kill_control_process(Service
*s
) {
2306 if (s
->control_pid
<= 0)
2309 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2311 _cleanup_free_
char *comm
= NULL
;
2313 (void) get_process_comm(s
->control_pid
, &comm
);
2315 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2316 s
->control_pid
, strna(comm
));
2320 static int service_adverse_to_leftover_processes(Service
*s
) {
2323 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2324 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2325 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2326 * time is quite variable (so Timeout settings aren't of use).
2328 * Here we take these two factors and refuse to start a service if there are existing processes
2329 * within a control group. Databases, while generally having some protection against multiple
2330 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2331 * aren't as rigoriously written to protect aganst against multiple use. */
2333 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2334 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2335 !s
->kill_context
.send_sigkill
)
2336 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2337 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2342 static void service_enter_start(Service
*s
) {
2350 service_unwatch_control_pid(s
);
2351 service_unwatch_main_pid(s
);
2353 r
= service_adverse_to_leftover_processes(s
);
2357 if (s
->type
== SERVICE_FORKING
) {
2358 s
->control_command_id
= SERVICE_EXEC_START
;
2359 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2361 s
->main_command
= NULL
;
2363 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2364 s
->control_command
= NULL
;
2366 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2370 if (s
->type
!= SERVICE_ONESHOT
) {
2371 /* There's no command line configured for the main command? Hmm, that is strange.
2372 * This can only happen if the configuration changes at runtime. In this case,
2373 * let's enter a failure state. */
2374 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2378 /* We force a fake state transition here. Otherwise, the unit would go directly from
2379 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2380 * in between. This way we can later trigger actions that depend on the state
2381 * transition, including SuccessAction=. */
2382 service_set_state(s
, SERVICE_START
);
2384 service_enter_start_post(s
);
2388 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2389 /* For simple + idle this is the main process. We don't apply any timeout here, but
2390 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2391 timeout
= USEC_INFINITY
;
2393 timeout
= s
->timeout_start_usec
;
2395 r
= service_spawn(s
,
2398 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
|EXEC_SETENV_MONITOR_RESULT
,
2403 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2404 /* For simple services we immediately start
2405 * the START_POST binaries. */
2407 (void) service_set_main_pid(s
, pid
);
2408 service_enter_start_post(s
);
2410 } else if (s
->type
== SERVICE_FORKING
) {
2412 /* For forking services we wait until the start
2413 * process exited. */
2415 s
->control_pid
= pid
;
2416 service_set_state(s
, SERVICE_START
);
2418 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
, SERVICE_EXEC
)) {
2420 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2422 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2423 * bus. 'notify' and 'exec' services are similar. */
2425 (void) service_set_main_pid(s
, pid
);
2426 service_set_state(s
, SERVICE_START
);
2428 assert_not_reached();
2433 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2434 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2437 static void service_enter_start_pre(Service
*s
) {
2442 service_unwatch_control_pid(s
);
2444 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2445 if (s
->control_command
) {
2447 r
= service_adverse_to_leftover_processes(s
);
2451 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2453 r
= service_spawn(s
,
2455 s
->timeout_start_usec
,
2456 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2461 service_set_state(s
, SERVICE_START_PRE
);
2463 service_enter_start(s
);
2468 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2469 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2472 static void service_enter_condition(Service
*s
) {
2477 service_unwatch_control_pid(s
);
2479 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2480 if (s
->control_command
) {
2482 r
= service_adverse_to_leftover_processes(s
);
2486 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2488 r
= service_spawn(s
,
2490 s
->timeout_start_usec
,
2491 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2497 service_set_state(s
, SERVICE_CONDITION
);
2499 service_enter_start_pre(s
);
2504 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2505 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2508 static void service_enter_restart(Service
*s
) {
2509 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2514 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2515 /* Don't restart things if we are going down anyway */
2516 log_unit_info(UNIT(s
), "Stop job pending for unit, skipping automatic restart.");
2520 /* Any units that are bound to this service must also be restarted. We use JOB_START for ourselves
2521 * but then set JOB_RESTART_DEPENDENCIES which will enqueue JOB_RESTART for those dependency jobs. */
2522 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, UNIT(s
), JOB_RESTART_DEPENDENCIES
, NULL
, &error
, NULL
);
2526 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't
2527 * fully stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset
2528 * the counter explicitly however via the usual "systemctl reset-failure" logic. */
2530 s
->flush_n_restarts
= false;
2532 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2534 log_unit_struct(UNIT(s
), LOG_INFO
,
2535 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2536 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2537 LOG_UNIT_MESSAGE(UNIT(s
),
2538 "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2539 "N_RESTARTS=%u", s
->n_restarts
);
2541 service_set_state(s
, SERVICE_AUTO_RESTART_QUEUED
);
2543 /* Notify clients about changed restart counter */
2544 unit_add_to_dbus_queue(UNIT(s
));
2548 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2549 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2552 static void service_enter_reload_by_notify(Service
*s
) {
2553 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2558 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2559 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
2561 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2562 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2564 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2567 static void service_enter_reload(Service
*s
) {
2568 bool killed
= false;
2573 service_unwatch_control_pid(s
);
2574 s
->reload_result
= SERVICE_SUCCESS
;
2576 usec_t ts
= now(CLOCK_MONOTONIC
);
2578 if (s
->type
== SERVICE_NOTIFY_RELOAD
&& s
->main_pid
> 0) {
2579 r
= kill_and_sigcont(s
->main_pid
, s
->reload_signal
);
2581 log_unit_warning_errno(UNIT(s
), r
, "Failed to send reload signal: %m");
2588 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2589 if (s
->control_command
) {
2590 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2592 r
= service_spawn(s
,
2594 s
->timeout_start_usec
,
2595 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2598 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2602 service_set_state(s
, SERVICE_RELOAD
);
2603 } else if (killed
) {
2604 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2605 service_set_state(s
, SERVICE_RELOAD_SIGNAL
);
2607 service_enter_running(s
, SERVICE_SUCCESS
);
2611 /* Store the timestamp when we started reloading: when reloading via SIGHUP we won't leave the reload
2612 * state until we received both RELOADING=1 and READY=1 with MONOTONIC_USEC= set to a value above
2613 * this. Thus we know for sure the reload cycle was executed *after* we requested it, and is not one
2614 * that was already in progress before. */
2615 s
->reload_begin_usec
= ts
;
2619 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2620 service_enter_running(s
, SERVICE_SUCCESS
);
2623 static void service_run_next_control(Service
*s
) {
2628 assert(s
->control_command
);
2629 assert(s
->control_command
->command_next
);
2631 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2633 s
->control_command
= s
->control_command
->command_next
;
2634 service_unwatch_control_pid(s
);
2636 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2637 timeout
= s
->timeout_start_usec
;
2639 timeout
= s
->timeout_stop_usec
;
2641 r
= service_spawn(s
,
2644 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2645 (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
) ? EXEC_WRITE_CREDENTIALS
: 0)|
2646 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2647 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2648 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_START
) ? EXEC_SETENV_MONITOR_RESULT
: 0)|
2649 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2657 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2659 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2660 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2661 else if (s
->state
== SERVICE_STOP_POST
)
2662 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2663 else if (s
->state
== SERVICE_RELOAD
) {
2664 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2665 service_enter_running(s
, SERVICE_SUCCESS
);
2667 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2670 static void service_run_next_main(Service
*s
) {
2675 assert(s
->main_command
);
2676 assert(s
->main_command
->command_next
);
2677 assert(s
->type
== SERVICE_ONESHOT
);
2679 s
->main_command
= s
->main_command
->command_next
;
2680 service_unwatch_main_pid(s
);
2682 r
= service_spawn(s
,
2684 s
->timeout_start_usec
,
2685 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2690 (void) service_set_main_pid(s
, pid
);
2695 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2696 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2699 static int service_start(Unit
*u
) {
2700 Service
*s
= SERVICE(u
);
2705 /* We cannot fulfill this request right now, try again later
2707 if (IN_SET(s
->state
,
2708 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2709 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2712 /* Already on it! */
2713 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2716 /* A service that will be restarted must be stopped first to trigger BindsTo and/or OnFailure
2717 * dependencies. If a user does not want to wait for the holdoff time to elapse, the service should
2718 * be manually restarted, not started. We simply return EAGAIN here, so that any start jobs stay
2719 * queued, and assume that the auto restart timer will eventually trigger the restart. */
2720 if (IN_SET(s
->state
, SERVICE_AUTO_RESTART
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
))
2723 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
, SERVICE_AUTO_RESTART_QUEUED
));
2725 r
= unit_acquire_invocation_id(u
);
2729 s
->result
= SERVICE_SUCCESS
;
2730 s
->reload_result
= SERVICE_SUCCESS
;
2731 s
->main_pid_known
= false;
2732 s
->main_pid_alien
= false;
2733 s
->forbid_restart
= false;
2735 s
->status_text
= mfree(s
->status_text
);
2736 s
->status_errno
= 0;
2738 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2739 s
->notify_state
= NOTIFY_UNKNOWN
;
2741 s
->watchdog_original_usec
= s
->watchdog_usec
;
2742 s
->watchdog_override_enable
= false;
2743 s
->watchdog_override_usec
= USEC_INFINITY
;
2745 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2746 exec_status_reset(&s
->main_exec_status
);
2748 /* This is not an automatic restart? Flush the restart counter then */
2749 if (s
->flush_n_restarts
) {
2751 s
->flush_n_restarts
= false;
2754 u
->reset_accounting
= true;
2756 service_enter_condition(s
);
2760 static int service_stop(Unit
*u
) {
2761 Service
*s
= SERVICE(u
);
2765 /* Don't create restart jobs from manual stops. */
2766 s
->forbid_restart
= true;
2771 case SERVICE_STOP_SIGTERM
:
2772 case SERVICE_STOP_SIGKILL
:
2773 case SERVICE_STOP_POST
:
2774 case SERVICE_FINAL_WATCHDOG
:
2775 case SERVICE_FINAL_SIGTERM
:
2776 case SERVICE_FINAL_SIGKILL
:
2780 case SERVICE_AUTO_RESTART
:
2781 case SERVICE_AUTO_RESTART_QUEUED
:
2782 /* Give up on the auto restart */
2783 service_set_state(s
, service_determine_dead_state(s
));
2786 case SERVICE_CONDITION
:
2787 case SERVICE_START_PRE
:
2789 case SERVICE_START_POST
:
2790 case SERVICE_RELOAD
:
2791 case SERVICE_RELOAD_SIGNAL
:
2792 case SERVICE_RELOAD_NOTIFY
:
2793 case SERVICE_STOP_WATCHDOG
:
2794 /* If there's already something running we go directly into kill mode. */
2795 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2798 case SERVICE_CLEANING
:
2799 /* If we are currently cleaning, then abort it, brutally. */
2800 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2803 case SERVICE_RUNNING
:
2804 case SERVICE_EXITED
:
2805 service_enter_stop(s
, SERVICE_SUCCESS
);
2808 case SERVICE_DEAD_BEFORE_AUTO_RESTART
:
2809 case SERVICE_FAILED_BEFORE_AUTO_RESTART
:
2811 case SERVICE_FAILED
:
2812 case SERVICE_DEAD_RESOURCES_PINNED
:
2814 /* Unknown state, or unit_stop() should already have handled these */
2815 assert_not_reached();
2819 static int service_reload(Unit
*u
) {
2820 Service
*s
= SERVICE(u
);
2824 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2826 service_enter_reload(s
);
2830 _pure_
static bool service_can_reload(Unit
*u
) {
2831 Service
*s
= SERVICE(u
);
2835 return s
->exec_command
[SERVICE_EXEC_RELOAD
] ||
2836 s
->type
== SERVICE_NOTIFY_RELOAD
;
2839 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, const ExecCommand
*current
) {
2840 Service
*s
= SERVICE(u
);
2845 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2847 const ExecCommand
*first
= s
->exec_command
[id
];
2849 /* Figure out where we are in the list by walking back to the beginning */
2850 for (const ExecCommand
*c
= current
; c
!= first
; c
= c
->command_prev
)
2856 static int service_serialize_exec_command(Unit
*u
, FILE *f
, const ExecCommand
*command
) {
2857 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2858 Service
*s
= SERVICE(u
);
2859 const char *type
, *key
;
2860 ServiceExecCommand id
;
2870 if (command
== s
->control_command
) {
2872 id
= s
->control_command_id
;
2875 id
= SERVICE_EXEC_START
;
2878 idx
= service_exec_command_index(u
, id
, command
);
2880 STRV_FOREACH(arg
, command
->argv
) {
2881 _cleanup_free_
char *e
= NULL
;
2889 if (!GREEDY_REALLOC(args
, length
+ 2 + n
+ 2))
2893 args
[length
++] = ' ';
2895 args
[length
++] = '"';
2896 memcpy(args
+ length
, e
, n
);
2898 args
[length
++] = '"';
2901 if (!GREEDY_REALLOC(args
, length
+ 1))
2906 p
= cescape(command
->path
);
2910 key
= strjoina(type
, "-command");
2912 /* We use '+1234' instead of '1234' to mark the last command in a sequence.
2913 * This is used in service_deserialize_exec_command(). */
2914 (void) serialize_item_format(
2917 service_exec_command_to_string(id
),
2918 command
->command_next
? "" : "+",
2925 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2926 Service
*s
= SERVICE(u
);
2933 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2934 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2935 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2937 if (s
->control_pid
> 0)
2938 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2940 if (s
->main_pid_known
&& s
->main_pid
> 0)
2941 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2943 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2944 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2945 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2947 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2948 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2950 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2954 service_serialize_exec_command(u
, f
, s
->control_command
);
2955 service_serialize_exec_command(u
, f
, s
->main_command
);
2957 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2960 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2963 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2967 if (s
->exec_fd_event_source
) {
2968 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2972 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2975 if (UNIT_ISSET(s
->accept_socket
)) {
2976 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2981 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2985 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2986 _cleanup_free_
char *c
= NULL
;
2989 copy
= fdset_put_dup(fds
, fs
->fd
);
2991 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2993 c
= cescape(fs
->fdname
);
2997 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
3000 if (s
->main_exec_status
.pid
> 0) {
3001 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
3002 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
3003 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
3005 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
3006 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
3007 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
3011 if (s
->notify_access_override
>= 0)
3012 (void) serialize_item(f
, "notify-access-override", notify_access_to_string(s
->notify_access_override
));
3014 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
3015 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
3017 if (s
->watchdog_override_enable
)
3018 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
3020 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
3021 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
3023 if (s
->reload_begin_usec
!= USEC_INFINITY
)
3024 (void) serialize_item_format(f
, "reload-begin-usec", USEC_FMT
, s
->reload_begin_usec
);
3029 int service_deserialize_exec_command(
3032 const char *value
) {
3034 Service
*s
= SERVICE(u
);
3036 unsigned idx
= 0, i
;
3037 bool control
, found
= false, last
= false;
3038 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
3039 ExecCommand
*command
= NULL
;
3040 _cleanup_free_
char *path
= NULL
;
3041 _cleanup_strv_free_
char **argv
= NULL
;
3043 enum ExecCommandState
{
3044 STATE_EXEC_COMMAND_TYPE
,
3045 STATE_EXEC_COMMAND_INDEX
,
3046 STATE_EXEC_COMMAND_PATH
,
3047 STATE_EXEC_COMMAND_ARGS
,
3048 _STATE_EXEC_COMMAND_MAX
,
3049 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
3056 control
= streq(key
, "control-command");
3058 state
= STATE_EXEC_COMMAND_TYPE
;
3061 _cleanup_free_
char *arg
= NULL
;
3063 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3070 case STATE_EXEC_COMMAND_TYPE
:
3071 id
= service_exec_command_from_string(arg
);
3075 state
= STATE_EXEC_COMMAND_INDEX
;
3077 case STATE_EXEC_COMMAND_INDEX
:
3078 /* PID 1234 is serialized as either '1234' or '+1234'. The second form is used to
3079 * mark the last command in a sequence. We warn if the deserialized command doesn't
3080 * match what we have loaded from the unit, but we don't need to warn if that is the
3083 r
= safe_atou(arg
, &idx
);
3086 last
= arg
[0] == '+';
3088 state
= STATE_EXEC_COMMAND_PATH
;
3090 case STATE_EXEC_COMMAND_PATH
:
3091 path
= TAKE_PTR(arg
);
3092 state
= STATE_EXEC_COMMAND_ARGS
;
3094 case STATE_EXEC_COMMAND_ARGS
:
3095 r
= strv_extend(&argv
, arg
);
3100 assert_not_reached();
3104 if (state
!= STATE_EXEC_COMMAND_ARGS
)
3106 if (strv_isempty(argv
))
3107 return -EINVAL
; /* At least argv[0] must be always present. */
3109 /* Let's check whether exec command on given offset matches data that we just deserialized */
3110 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
3114 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
3119 /* Command at the index we serialized is different, let's look for command that exactly
3120 * matches but is on different index. If there is no such command we will not resume execution. */
3121 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
3122 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
3126 if (command
&& control
) {
3127 s
->control_command
= command
;
3128 s
->control_command_id
= id
;
3130 s
->main_command
= command
;
3132 log_unit_debug(u
, "Current command vanished from the unit file.");
3134 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
3139 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
3140 Service
*s
= SERVICE(u
);
3148 if (streq(key
, "state")) {
3151 state
= service_state_from_string(value
);
3153 log_unit_debug(u
, "Failed to parse state value: %s", value
);
3155 s
->deserialized_state
= state
;
3156 } else if (streq(key
, "result")) {
3159 f
= service_result_from_string(value
);
3161 log_unit_debug(u
, "Failed to parse result value: %s", value
);
3162 else if (f
!= SERVICE_SUCCESS
)
3165 } else if (streq(key
, "reload-result")) {
3168 f
= service_result_from_string(value
);
3170 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
3171 else if (f
!= SERVICE_SUCCESS
)
3172 s
->reload_result
= f
;
3174 } else if (streq(key
, "control-pid")) {
3177 if (parse_pid(value
, &pid
) < 0)
3178 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
3180 s
->control_pid
= pid
;
3181 } else if (streq(key
, "main-pid")) {
3184 if (parse_pid(value
, &pid
) < 0)
3185 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
3187 (void) service_set_main_pid(s
, pid
);
3188 } else if (streq(key
, "main-pid-known")) {
3191 b
= parse_boolean(value
);
3193 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
3195 s
->main_pid_known
= b
;
3196 } else if (streq(key
, "bus-name-good")) {
3199 b
= parse_boolean(value
);
3201 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
3203 s
->bus_name_good
= b
;
3204 } else if (streq(key
, "bus-name-owner")) {
3205 r
= free_and_strdup(&s
->bus_name_owner
, value
);
3207 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
3208 } else if (streq(key
, "status-text")) {
3212 l
= cunescape(value
, 0, &t
);
3214 log_unit_debug_errno(u
, l
, "Failed to unescape status text '%s': %m", value
);
3216 free_and_replace(s
->status_text
, t
);
3218 } else if (streq(key
, "accept-socket")) {
3221 if (u
->type
!= UNIT_SOCKET
) {
3222 log_unit_debug(u
, "Failed to deserialize accept-socket: unit is not a 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 ((fd
= parse_fd(value
)) < 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
;
3247 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
3248 if (r
<= 0 || (fd
= parse_fd(fdv
)) < 0 || !fdset_contains(fds
, fd
)) {
3249 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3253 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3255 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3259 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
3261 /* If the value is not present, we assume the default */
3263 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
3264 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
3268 r
= fdset_remove(fds
, fd
);
3270 log_unit_error_errno(u
, r
, "Could not find deserialized fd %i in fdset: %m", fd
);
3275 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
3277 log_unit_error_errno(u
, r
, "Failed to store deserialized fd %i: %m", fd
);
3280 } else if (streq(key
, "main-exec-status-pid")) {
3283 if (parse_pid(value
, &pid
) < 0)
3284 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
3286 s
->main_exec_status
.pid
= pid
;
3287 } else if (streq(key
, "main-exec-status-code")) {
3290 if (safe_atoi(value
, &i
) < 0)
3291 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
3293 s
->main_exec_status
.code
= i
;
3294 } else if (streq(key
, "main-exec-status-status")) {
3297 if (safe_atoi(value
, &i
) < 0)
3298 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3300 s
->main_exec_status
.status
= i
;
3301 } else if (streq(key
, "main-exec-status-start"))
3302 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3303 else if (streq(key
, "main-exec-status-exit"))
3304 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3305 else if (streq(key
, "notify-access-override")) {
3306 NotifyAccess notify_access
;
3308 notify_access
= notify_access_from_string(value
);
3309 if (notify_access
< 0)
3310 log_unit_debug(u
, "Failed to parse notify-access-override value: %s", value
);
3312 s
->notify_access_override
= notify_access
;
3313 } else if (streq(key
, "watchdog-timestamp"))
3314 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3315 else if (streq(key
, "forbid-restart")) {
3318 b
= parse_boolean(value
);
3320 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3322 s
->forbid_restart
= b
;
3323 } else if (streq(key
, "stdin-fd")) {
3326 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3327 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3329 asynchronous_close(s
->stdin_fd
);
3330 s
->stdin_fd
= fdset_remove(fds
, fd
);
3331 s
->exec_context
.stdio_as_fds
= true;
3333 } else if (streq(key
, "stdout-fd")) {
3336 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3337 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3339 asynchronous_close(s
->stdout_fd
);
3340 s
->stdout_fd
= fdset_remove(fds
, fd
);
3341 s
->exec_context
.stdio_as_fds
= true;
3343 } else if (streq(key
, "stderr-fd")) {
3346 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3347 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3349 asynchronous_close(s
->stderr_fd
);
3350 s
->stderr_fd
= fdset_remove(fds
, fd
);
3351 s
->exec_context
.stdio_as_fds
= true;
3353 } else if (streq(key
, "exec-fd")) {
3356 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3357 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3359 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3361 fd
= fdset_remove(fds
, fd
);
3362 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3365 } else if (streq(key
, "watchdog-override-usec")) {
3366 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3367 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3369 s
->watchdog_override_enable
= true;
3371 } else if (streq(key
, "watchdog-original-usec")) {
3372 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3373 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3375 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3376 r
= service_deserialize_exec_command(u
, key
, value
);
3378 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3380 } else if (streq(key
, "n-restarts")) {
3381 r
= safe_atou(value
, &s
->n_restarts
);
3383 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3385 } else if (streq(key
, "flush-n-restarts")) {
3386 r
= parse_boolean(value
);
3388 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3390 s
->flush_n_restarts
= r
;
3391 } else if (streq(key
, "reload-begin-usec")) {
3392 r
= deserialize_usec(value
, &s
->reload_begin_usec
);
3394 log_unit_debug_errno(u
, r
, "Failed to parse serialized reload begin timestamp '%s', ignoring: %m", value
);
3396 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3401 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3402 const UnitActiveState
*table
;
3406 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3408 return table
[SERVICE(u
)->state
];
3411 static const char *service_sub_state_to_string(Unit
*u
) {
3414 return service_state_to_string(SERVICE(u
)->state
);
3417 static bool service_may_gc(Unit
*u
) {
3418 Service
*s
= SERVICE(u
);
3422 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3423 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3424 * have moved outside of the cgroup. */
3426 if (main_pid_good(s
) > 0 ||
3427 control_pid_good(s
) > 0)
3430 /* Only allow collection of actually dead services, i.e. not those that are in the transitionary
3431 * SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART states. */
3432 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
3438 static int service_retry_pid_file(Service
*s
) {
3441 assert(s
->pid_file
);
3442 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3444 r
= service_load_pid_file(s
, false);
3448 service_unwatch_pid_file(s
);
3450 service_enter_running(s
, SERVICE_SUCCESS
);
3454 static int service_watch_pid_file(Service
*s
) {
3457 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3459 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3463 /* the pidfile might have appeared just before we set the watch */
3464 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3465 service_retry_pid_file(s
);
3469 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3470 service_unwatch_pid_file(s
);
3474 static int service_demand_pid_file(Service
*s
) {
3475 _cleanup_free_ PathSpec
*ps
= NULL
;
3477 assert(s
->pid_file
);
3478 assert(!s
->pid_file_pathspec
);
3480 ps
= new(PathSpec
, 1);
3486 .path
= strdup(s
->pid_file
),
3487 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that keep their PID file
3488 * open all the time. */
3489 .type
= PATH_MODIFIED
,
3490 .inotify_fd
= -EBADF
,
3496 path_simplify(ps
->path
);
3498 s
->pid_file_pathspec
= TAKE_PTR(ps
);
3500 return service_watch_pid_file(s
);
3503 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3504 PathSpec
*p
= ASSERT_PTR(userdata
);
3507 s
= SERVICE(p
->unit
);
3511 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3512 assert(s
->pid_file_pathspec
);
3513 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3515 log_unit_debug(UNIT(s
), "inotify event");
3517 if (path_spec_fd_event(p
, events
) < 0)
3520 if (service_retry_pid_file(s
) == 0)
3523 if (service_watch_pid_file(s
) < 0)
3529 service_unwatch_pid_file(s
);
3530 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3534 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3535 Service
*s
= SERVICE(userdata
);
3539 log_unit_debug(UNIT(s
), "got exec-fd event");
3541 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3542 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3543 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3544 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3545 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3546 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3547 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3548 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3554 n
= read(fd
, &x
, sizeof(x
));
3556 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3559 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3561 if (n
== 0) { /* EOF → the event we are waiting for */
3563 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3565 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3566 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3568 s
->exec_fd_hot
= false;
3570 /* Nice! This is what we have been waiting for. Transition to next state. */
3571 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3572 service_enter_start_post(s
);
3574 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3579 /* A byte was read → this turns on/off the exec fd logic */
3580 assert(n
== sizeof(x
));
3587 static void service_notify_cgroup_empty_event(Unit
*u
) {
3588 Service
*s
= SERVICE(u
);
3592 log_unit_debug(u
, "Control group is empty.");
3596 /* Waiting for SIGCHLD is usually more interesting, because it includes return
3597 * codes/signals. Which is why we ignore the cgroup events for most cases, except when we
3598 * don't know pid which to expect the SIGCHLD for. */
3601 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
3602 main_pid_good(s
) == 0 &&
3603 control_pid_good(s
) == 0) {
3604 /* No chance of getting a ready notification anymore */
3605 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3609 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& main_pid_good(s
) <= 0)
3610 service_enter_start_post(s
);
3613 case SERVICE_START_POST
:
3614 if (s
->pid_file_pathspec
&&
3615 main_pid_good(s
) == 0 &&
3616 control_pid_good(s
) == 0) {
3618 /* Give up hoping for the daemon to write its PID file */
3619 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3621 service_unwatch_pid_file(s
);
3622 if (s
->state
== SERVICE_START
)
3623 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3625 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3629 case SERVICE_RUNNING
:
3630 /* service_enter_running() will figure out what to do */
3631 service_enter_running(s
, SERVICE_SUCCESS
);
3634 case SERVICE_STOP_WATCHDOG
:
3635 case SERVICE_STOP_SIGTERM
:
3636 case SERVICE_STOP_SIGKILL
:
3638 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3639 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3643 case SERVICE_STOP_POST
:
3644 case SERVICE_FINAL_WATCHDOG
:
3645 case SERVICE_FINAL_SIGTERM
:
3646 case SERVICE_FINAL_SIGKILL
:
3647 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3648 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3652 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3653 * up the cgroup earlier and should do it now. */
3654 case SERVICE_AUTO_RESTART
:
3655 case SERVICE_AUTO_RESTART_QUEUED
:
3656 unit_prune_cgroup(u
);
3664 static void service_notify_cgroup_oom_event(Unit
*u
, bool managed_oom
) {
3665 Service
*s
= SERVICE(u
);
3668 log_unit_debug(u
, "Process(es) of control group were killed by systemd-oomd.");
3670 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3672 if (s
->oom_policy
== OOM_CONTINUE
)
3677 case SERVICE_CONDITION
:
3678 case SERVICE_START_PRE
:
3680 case SERVICE_START_POST
:
3682 if (s
->oom_policy
== OOM_STOP
)
3683 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3684 else if (s
->oom_policy
== OOM_KILL
)
3685 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3689 case SERVICE_EXITED
:
3690 case SERVICE_RUNNING
:
3691 if (s
->oom_policy
== OOM_STOP
)
3692 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3693 else if (s
->oom_policy
== OOM_KILL
)
3694 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3698 case SERVICE_STOP_WATCHDOG
:
3699 case SERVICE_STOP_SIGTERM
:
3700 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3703 case SERVICE_STOP_SIGKILL
:
3704 case SERVICE_FINAL_SIGKILL
:
3705 if (s
->result
== SERVICE_SUCCESS
)
3706 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3709 case SERVICE_STOP_POST
:
3710 case SERVICE_FINAL_SIGTERM
:
3711 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3719 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3720 bool notify_dbus
= true;
3721 Service
*s
= SERVICE(u
);
3723 ExitClean clean_mode
;
3728 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3729 * considered daemons as they are typically not long running. */
3730 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3731 clean_mode
= EXIT_CLEAN_COMMAND
;
3733 clean_mode
= EXIT_CLEAN_DAEMON
;
3735 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3736 f
= SERVICE_SUCCESS
;
3737 else if (code
== CLD_EXITED
)
3738 f
= SERVICE_FAILURE_EXIT_CODE
;
3739 else if (code
== CLD_KILLED
)
3740 f
= SERVICE_FAILURE_SIGNAL
;
3741 else if (code
== CLD_DUMPED
)
3742 f
= SERVICE_FAILURE_CORE_DUMP
;
3744 assert_not_reached();
3746 if (s
->main_pid
== pid
) {
3747 /* Clean up the exec_fd event source. We want to do this here, not later in
3748 * service_set_state(), because service_enter_stop_post() calls service_spawn().
3749 * The source owns its end of the pipe, so this will close that too. */
3750 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3752 /* Forking services may occasionally move to a new PID.
3753 * As long as they update the PID file before exiting the old
3754 * PID, they're fine. */
3755 if (service_load_pid_file(s
, false) > 0)
3759 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3761 if (s
->main_command
) {
3762 /* If this is not a forking service than the
3763 * main process got started and hence we copy
3764 * the exit status so that it is recorded both
3765 * as main and as control process exit
3768 s
->main_command
->exec_status
= s
->main_exec_status
;
3770 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3771 f
= SERVICE_SUCCESS
;
3772 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3774 /* If this is a forked process, then we should
3775 * ignore the return value if this was
3776 * configured for the starter process */
3778 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3779 f
= SERVICE_SUCCESS
;
3782 unit_log_process_exit(
3785 service_exec_command_to_string(SERVICE_EXEC_START
),
3786 f
== SERVICE_SUCCESS
,
3789 if (s
->result
== SERVICE_SUCCESS
)
3792 if (s
->main_command
&&
3793 s
->main_command
->command_next
&&
3794 s
->type
== SERVICE_ONESHOT
&&
3795 f
== SERVICE_SUCCESS
) {
3797 /* There is another command to execute, so let's do that. */
3799 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3800 service_run_next_main(s
);
3803 s
->main_command
= NULL
;
3805 /* Services with ExitType=cgroup do not act on main PID exiting, unless the cgroup is
3807 if (s
->exit_type
== SERVICE_EXIT_MAIN
|| cgroup_good(s
) <= 0) {
3808 /* The service exited, so the service is officially gone. */
3811 case SERVICE_START_POST
:
3812 case SERVICE_RELOAD
:
3813 case SERVICE_RELOAD_SIGNAL
:
3814 case SERVICE_RELOAD_NOTIFY
:
3815 /* If neither main nor control processes are running then the current
3816 * state can never exit cleanly, hence immediately terminate the
3818 if (control_pid_good(s
) <= 0)
3819 service_enter_stop(s
, f
);
3821 /* Otherwise need to wait until the operation is done. */
3825 /* Need to wait until the operation is done. */
3829 if (s
->type
== SERVICE_ONESHOT
) {
3830 /* This was our main goal, so let's go on */
3831 if (f
== SERVICE_SUCCESS
)
3832 service_enter_start_post(s
);
3834 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3836 } else if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
)) {
3837 /* Only enter running through a notification, so that the
3838 * SERVICE_START state signifies that no ready notification
3839 * has been received */
3840 if (f
!= SERVICE_SUCCESS
)
3841 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3842 else if (!s
->remain_after_exit
|| service_get_notify_access(s
) == NOTIFY_MAIN
)
3843 /* The service has never been and will never be active */
3844 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3849 case SERVICE_RUNNING
:
3850 service_enter_running(s
, f
);
3853 case SERVICE_STOP_WATCHDOG
:
3854 case SERVICE_STOP_SIGTERM
:
3855 case SERVICE_STOP_SIGKILL
:
3857 if (control_pid_good(s
) <= 0)
3858 service_enter_stop_post(s
, f
);
3860 /* If there is still a control process, wait for that first */
3863 case SERVICE_STOP_POST
:
3865 if (control_pid_good(s
) <= 0)
3866 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3870 case SERVICE_FINAL_WATCHDOG
:
3871 case SERVICE_FINAL_SIGTERM
:
3872 case SERVICE_FINAL_SIGKILL
:
3874 if (control_pid_good(s
) <= 0)
3875 service_enter_dead(s
, f
, true);
3879 assert_not_reached();
3884 } else if (s
->control_pid
== pid
) {
3890 if (s
->control_command
) {
3891 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3893 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3894 f
= SERVICE_SUCCESS
;
3897 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3898 if (s
->state
== SERVICE_CONDITION
) {
3899 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3900 UNIT(s
)->condition_result
= false;
3901 f
= SERVICE_SKIP_CONDITION
;
3903 } else if (f
== SERVICE_SUCCESS
) {
3904 UNIT(s
)->condition_result
= true;
3909 kind
= "Condition check process";
3911 kind
= "Control process";
3912 success
= f
== SERVICE_SUCCESS
;
3915 unit_log_process_exit(
3918 service_exec_command_to_string(s
->control_command_id
),
3922 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3925 if (s
->control_command
&&
3926 s
->control_command
->command_next
&&
3927 f
== SERVICE_SUCCESS
) {
3929 /* There is another command to * execute, so let's do that. */
3931 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3932 service_run_next_control(s
);
3935 /* No further commands for this step, so let's figure out what to do next */
3937 s
->control_command
= NULL
;
3938 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3940 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3944 case SERVICE_CONDITION
:
3945 if (f
== SERVICE_SUCCESS
)
3946 service_enter_start_pre(s
);
3948 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3951 case SERVICE_START_PRE
:
3952 if (f
== SERVICE_SUCCESS
)
3953 service_enter_start(s
);
3955 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3959 if (s
->type
!= SERVICE_FORKING
)
3960 /* Maybe spurious event due to a reload that changed the type? */
3963 if (f
!= SERVICE_SUCCESS
) {
3964 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3969 bool has_start_post
;
3972 /* Let's try to load the pid file here if we can.
3973 * The PID file might actually be created by a START_POST
3974 * script. In that case don't worry if the loading fails. */
3976 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3977 r
= service_load_pid_file(s
, !has_start_post
);
3978 if (!has_start_post
&& r
< 0) {
3979 r
= service_demand_pid_file(s
);
3980 if (r
< 0 || cgroup_good(s
) == 0)
3981 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3985 service_search_main_pid(s
);
3987 service_enter_start_post(s
);
3990 case SERVICE_START_POST
:
3991 if (f
!= SERVICE_SUCCESS
) {
3992 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3999 r
= service_load_pid_file(s
, true);
4001 r
= service_demand_pid_file(s
);
4002 if (r
< 0 || cgroup_good(s
) == 0)
4003 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
4007 service_search_main_pid(s
);
4009 service_enter_running(s
, SERVICE_SUCCESS
);
4012 case SERVICE_RELOAD
:
4013 case SERVICE_RELOAD_SIGNAL
:
4014 case SERVICE_RELOAD_NOTIFY
:
4015 if (f
== SERVICE_SUCCESS
)
4016 if (service_load_pid_file(s
, true) < 0)
4017 service_search_main_pid(s
);
4019 s
->reload_result
= f
;
4021 /* If the last notification we received from the service process indicates
4022 * we are still reloading, then don't leave reloading state just yet, just
4023 * transition into SERVICE_RELOAD_NOTIFY, to wait for the READY=1 coming,
4025 if (s
->notify_state
== NOTIFY_RELOADING
)
4026 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4028 service_enter_running(s
, SERVICE_SUCCESS
);
4032 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
4035 case SERVICE_STOP_WATCHDOG
:
4036 case SERVICE_STOP_SIGTERM
:
4037 case SERVICE_STOP_SIGKILL
:
4038 if (main_pid_good(s
) <= 0)
4039 service_enter_stop_post(s
, f
);
4041 /* If there is still a service process around, wait until
4042 * that one quit, too */
4045 case SERVICE_STOP_POST
:
4046 if (main_pid_good(s
) <= 0)
4047 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
4050 case SERVICE_FINAL_WATCHDOG
:
4051 case SERVICE_FINAL_SIGTERM
:
4052 case SERVICE_FINAL_SIGKILL
:
4053 if (main_pid_good(s
) <= 0)
4054 service_enter_dead(s
, f
, true);
4057 case SERVICE_CLEANING
:
4059 if (s
->clean_result
== SERVICE_SUCCESS
)
4060 s
->clean_result
= f
;
4062 service_enter_dead(s
, SERVICE_SUCCESS
, false);
4066 assert_not_reached();
4069 } else /* Neither control nor main PID? If so, don't notify about anything */
4070 notify_dbus
= false;
4072 /* Notify clients about changed exit status */
4074 unit_add_to_dbus_queue(u
);
4076 /* We watch the main/control process otherwise we can't retrieve the unit they
4077 * belong to with cgroupv1. But if they are not our direct child, we won't get a
4078 * SIGCHLD for them. Therefore we need to look for others to watch so we can
4079 * detect when the cgroup becomes empty. Note that the control process is always
4080 * our child so it's pointless to watch all other processes. */
4081 if (!control_pid_good(s
))
4082 if (!s
->main_pid_known
|| s
->main_pid_alien
)
4083 (void) unit_enqueue_rewatch_pids(u
);
4086 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4087 Service
*s
= SERVICE(userdata
);
4090 assert(source
== s
->timer_event_source
);
4094 case SERVICE_CONDITION
:
4095 case SERVICE_START_PRE
:
4097 case SERVICE_START_POST
:
4098 switch (s
->timeout_start_failure_mode
) {
4100 case SERVICE_TIMEOUT_TERMINATE
:
4101 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
4102 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4105 case SERVICE_TIMEOUT_ABORT
:
4106 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
4107 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4110 case SERVICE_TIMEOUT_KILL
:
4111 if (s
->kill_context
.send_sigkill
) {
4112 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
4113 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4115 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
4116 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4121 assert_not_reached();
4125 case SERVICE_RUNNING
:
4126 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
4127 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
4130 case SERVICE_RELOAD
:
4131 case SERVICE_RELOAD_SIGNAL
:
4132 case SERVICE_RELOAD_NOTIFY
:
4133 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
4134 service_kill_control_process(s
);
4135 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
4136 service_enter_running(s
, SERVICE_SUCCESS
);
4140 switch (s
->timeout_stop_failure_mode
) {
4142 case SERVICE_TIMEOUT_TERMINATE
:
4143 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
4144 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4147 case SERVICE_TIMEOUT_ABORT
:
4148 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
4149 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4152 case SERVICE_TIMEOUT_KILL
:
4153 if (s
->kill_context
.send_sigkill
) {
4154 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
4155 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4157 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
4158 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4163 assert_not_reached();
4167 case SERVICE_STOP_WATCHDOG
:
4168 if (s
->kill_context
.send_sigkill
) {
4169 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
4170 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4172 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
4173 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4177 case SERVICE_STOP_SIGTERM
:
4178 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4179 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
4180 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4181 } else if (s
->kill_context
.send_sigkill
) {
4182 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
4183 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4185 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
4186 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4191 case SERVICE_STOP_SIGKILL
:
4192 /* Uh, we sent a SIGKILL and it is still not gone?
4193 * Must be something we cannot kill, so let's just be
4194 * weirded out and continue */
4196 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
4197 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4200 case SERVICE_STOP_POST
:
4201 switch (s
->timeout_stop_failure_mode
) {
4203 case SERVICE_TIMEOUT_TERMINATE
:
4204 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
4205 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4208 case SERVICE_TIMEOUT_ABORT
:
4209 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
4210 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4213 case SERVICE_TIMEOUT_KILL
:
4214 if (s
->kill_context
.send_sigkill
) {
4215 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
4216 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4218 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
4219 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4224 assert_not_reached();
4228 case SERVICE_FINAL_WATCHDOG
:
4229 if (s
->kill_context
.send_sigkill
) {
4230 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
4231 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4233 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
4234 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4238 case SERVICE_FINAL_SIGTERM
:
4239 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4240 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
4241 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4242 } else if (s
->kill_context
.send_sigkill
) {
4243 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
4244 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4246 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
4247 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4252 case SERVICE_FINAL_SIGKILL
:
4253 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
4254 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
4257 case SERVICE_AUTO_RESTART
:
4258 if (s
->restart_usec
> 0)
4259 log_unit_debug(UNIT(s
),
4260 "Service restart interval %s expired, scheduling restart.",
4261 FORMAT_TIMESPAN(service_restart_usec_next(s
), USEC_PER_SEC
));
4263 log_unit_debug(UNIT(s
),
4264 "Service has no hold-off time (RestartSec=0), scheduling restart.");
4266 service_enter_restart(s
);
4269 case SERVICE_CLEANING
:
4270 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
4272 if (s
->clean_result
== SERVICE_SUCCESS
)
4273 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
4275 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
4279 assert_not_reached();
4285 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4286 Service
*s
= SERVICE(userdata
);
4287 usec_t watchdog_usec
;
4290 assert(source
== s
->watchdog_event_source
);
4292 watchdog_usec
= service_get_watchdog_usec(s
);
4294 if (UNIT(s
)->manager
->service_watchdogs
) {
4295 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
4296 FORMAT_TIMESPAN(watchdog_usec
, 1));
4298 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4300 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
4301 FORMAT_TIMESPAN(watchdog_usec
, 1));
4306 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
4309 NotifyAccess notify_access
= service_get_notify_access(s
);
4311 if (notify_access
== NOTIFY_NONE
) {
4312 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
4316 if (notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
4317 if (s
->main_pid
!= 0)
4318 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
);
4320 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
);
4325 if (notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
4326 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
4327 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
,
4328 pid
, s
->main_pid
, s
->control_pid
);
4329 else if (s
->main_pid
!= 0)
4330 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
);
4331 else if (s
->control_pid
!= 0)
4332 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
);
4334 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
);
4342 static void service_force_watchdog(Service
*s
) {
4343 if (!UNIT(s
)->manager
->service_watchdogs
)
4346 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
4347 s
->status_text
?: "<unset>");
4349 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4352 static void service_notify_message(
4354 const struct ucred
*ucred
,
4358 Service
*s
= SERVICE(u
);
4359 bool notify_dbus
= false;
4360 usec_t monotonic_usec
= USEC_INFINITY
;
4367 if (!service_notify_message_authorized(s
, ucred
->pid
, fds
))
4370 if (DEBUG_LOGGING
) {
4371 _cleanup_free_
char *cc
= NULL
;
4373 cc
= strv_join(tags
, ", ");
4374 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4377 /* Interpret MAINPID= */
4378 e
= strv_find_startswith(tags
, "MAINPID=");
4379 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
)) {
4382 if (parse_pid(e
, &new_main_pid
) < 0)
4383 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4384 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4386 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4388 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4390 if (ucred
->uid
== 0) {
4391 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
);
4394 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4397 (void) service_set_main_pid(s
, new_main_pid
);
4399 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4401 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4408 /* Parse MONOTONIC_USEC= */
4409 e
= strv_find_startswith(tags
, "MONOTONIC_USEC=");
4411 r
= safe_atou64(e
, &monotonic_usec
);
4413 log_unit_warning_errno(u
, r
, "Failed to parse MONOTONIC_USEC= field in notification message, ignoring: %s", e
);
4416 /* Interpret READY=/STOPPING=/RELOADING=. STOPPING= wins over the others, and READY= over RELOADING= */
4417 if (strv_contains(tags
, "STOPPING=1")) {
4418 s
->notify_state
= NOTIFY_STOPPING
;
4420 if (IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
4421 service_enter_stop_by_notify(s
);
4425 } else if (strv_contains(tags
, "READY=1")) {
4427 s
->notify_state
= NOTIFY_READY
;
4429 /* Type=notify services inform us about completed initialization with READY=1 */
4430 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
4431 s
->state
== SERVICE_START
)
4432 service_enter_start_post(s
);
4434 /* Sending READY=1 while we are reloading informs us that the reloading is complete. */
4435 if (s
->state
== SERVICE_RELOAD_NOTIFY
)
4436 service_enter_running(s
, SERVICE_SUCCESS
);
4438 /* Combined RELOADING=1 and READY=1? Then this is indication that the service started and
4439 * immediately finished reloading. */
4440 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4441 strv_contains(tags
, "RELOADING=1") &&
4442 monotonic_usec
!= USEC_INFINITY
&&
4443 monotonic_usec
>= s
->reload_begin_usec
) {
4444 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
4446 /* Propagate a reload explicitly */
4447 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
4449 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload, ignoring: %s", bus_error_message(&error
, r
));
4451 service_enter_running(s
, SERVICE_SUCCESS
);
4456 } else if (strv_contains(tags
, "RELOADING=1")) {
4458 s
->notify_state
= NOTIFY_RELOADING
;
4460 /* Sending RELOADING=1 after we send SIGHUP to request a reload will transition
4461 * things to "reload-notify" state, where we'll wait for READY=1 to let us know the
4462 * reload is done. Note that we insist on a timestamp being sent along here, so that
4463 * we know for sure this is a reload cycle initiated *after* we sent the signal */
4464 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4465 monotonic_usec
!= USEC_INFINITY
&&
4466 monotonic_usec
>= s
->reload_begin_usec
)
4467 /* Note, we don't call service_enter_reload_by_notify() here, because we
4468 * don't need reload propagation nor do we want to restart the time-out. */
4469 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4471 if (s
->state
== SERVICE_RUNNING
)
4472 service_enter_reload_by_notify(s
);
4477 /* Interpret STATUS= */
4478 e
= strv_find_startswith(tags
, "STATUS=");
4480 _cleanup_free_
char *t
= NULL
;
4483 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4484 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4485 if (strlen(e
) > STATUS_TEXT_MAX
)
4486 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4487 else if (!utf8_is_valid(e
))
4488 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4496 if (!streq_ptr(s
->status_text
, t
)) {
4497 free_and_replace(s
->status_text
, t
);
4502 /* Interpret NOTIFYACCESS= */
4503 e
= strv_find_startswith(tags
, "NOTIFYACCESS=");
4505 NotifyAccess notify_access
;
4507 notify_access
= notify_access_from_string(e
);
4508 if (notify_access
< 0)
4509 log_unit_warning_errno(u
, notify_access
,
4510 "Failed to parse NOTIFYACCESS= field value '%s' in notification message, ignoring: %m", e
);
4512 /* We don't need to check whether the new access mode is more strict than what is
4513 * already in use, since only the privileged process is allowed to change it
4514 * in the first place. */
4515 if (service_get_notify_access(s
) != notify_access
) {
4516 service_override_notify_access(s
, notify_access
);
4521 /* Interpret ERRNO= */
4522 e
= strv_find_startswith(tags
, "ERRNO=");
4526 status_errno
= parse_errno(e
);
4527 if (status_errno
< 0)
4528 log_unit_warning_errno(u
, status_errno
,
4529 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4530 else if (s
->status_errno
!= status_errno
) {
4531 s
->status_errno
= status_errno
;
4536 /* Interpret EXTEND_TIMEOUT= */
4537 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4539 usec_t extend_timeout_usec
;
4540 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4541 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4543 service_extend_timeout(s
, extend_timeout_usec
);
4546 /* Interpret WATCHDOG= */
4547 e
= strv_find_startswith(tags
, "WATCHDOG=");
4550 service_reset_watchdog(s
);
4551 else if (streq(e
, "trigger"))
4552 service_force_watchdog(s
);
4554 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4557 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4559 usec_t watchdog_override_usec
;
4560 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4561 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4563 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4566 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4567 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4568 * fds, but optional when pushing in new fds, for compatibility reasons. */
4569 if (strv_contains(tags
, "FDSTOREREMOVE=1")) {
4572 name
= strv_find_startswith(tags
, "FDNAME=");
4573 if (!name
|| !fdname_is_valid(name
))
4574 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4576 service_remove_fd_store(s
, name
);
4578 } else if (strv_contains(tags
, "FDSTORE=1")) {
4581 name
= strv_find_startswith(tags
, "FDNAME=");
4582 if (name
&& !fdname_is_valid(name
)) {
4583 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4587 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4590 /* Notify clients about changed status or main pid */
4592 unit_add_to_dbus_queue(u
);
4595 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4596 Service
*s
= SERVICE(u
);
4600 if (!s
->timer_event_source
)
4603 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4606 if (t
== USEC_INFINITY
)
4613 static usec_t
service_get_timeout_start_usec(Unit
*u
) {
4614 Service
*s
= SERVICE(ASSERT_PTR(u
));
4615 return s
->timeout_start_usec
;
4618 static bool pick_up_pid_from_bus_name(Service
*s
) {
4621 /* If the service is running but we have no main PID yet, get it from the owner of the D-Bus name */
4623 return !pid_is_valid(s
->main_pid
) &&
4629 SERVICE_RELOAD_SIGNAL
,
4630 SERVICE_RELOAD_NOTIFY
);
4633 static int bus_name_pid_lookup_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*ret_error
) {
4634 const sd_bus_error
*e
;
4635 Unit
*u
= ASSERT_PTR(userdata
);
4643 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4645 if (!s
->bus_name
|| !pick_up_pid_from_bus_name(s
))
4648 e
= sd_bus_message_get_error(reply
);
4650 r
= sd_bus_error_get_errno(e
);
4651 log_warning_errno(r
, "GetConnectionUnixProcessID() failed: %s", bus_error_message(e
, r
));
4655 r
= sd_bus_message_read(reply
, "u", &pid
);
4657 bus_log_parse_error(r
);
4661 if (!pid_is_valid(pid
)) {
4662 log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "GetConnectionUnixProcessID() returned invalid PID");
4666 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, (pid_t
) pid
);
4668 (void) service_set_main_pid(s
, pid
);
4669 (void) unit_watch_pid(UNIT(s
), pid
, false);
4673 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4675 Service
*s
= SERVICE(u
);
4681 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4683 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4685 s
->bus_name_good
= new_owner
;
4687 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4688 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4690 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4694 if (s
->type
== SERVICE_DBUS
) {
4696 /* service_enter_running() will figure out what to
4698 if (s
->state
== SERVICE_RUNNING
)
4699 service_enter_running(s
, SERVICE_SUCCESS
);
4700 else if (s
->state
== SERVICE_START
&& new_owner
)
4701 service_enter_start_post(s
);
4703 } else if (new_owner
&& pick_up_pid_from_bus_name(s
)) {
4705 /* Try to acquire PID from bus service */
4707 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4709 r
= sd_bus_call_method_async(
4710 u
->manager
->api_bus
,
4711 &s
->bus_name_pid_lookup_slot
,
4712 "org.freedesktop.DBus",
4713 "/org/freedesktop/DBus",
4714 "org.freedesktop.DBus",
4715 "GetConnectionUnixProcessID",
4716 bus_name_pid_lookup_callback
,
4721 log_debug_errno(r
, "Failed to request owner PID of service name, ignoring: %m");
4725 int service_set_socket_fd(
4730 bool selinux_context_net
) {
4732 _cleanup_free_
char *peer_text
= NULL
;
4738 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4739 * to be configured. We take ownership of the passed fd on success. */
4741 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4744 if (s
->socket_fd
>= 0)
4747 assert(!s
->socket_peer
);
4749 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4752 if (getpeername_pretty(fd
, true, &peer_text
) >= 0) {
4754 if (UNIT(s
)->description
) {
4755 _cleanup_free_
char *a
= NULL
;
4757 a
= strjoin(UNIT(s
)->description
, " (", peer_text
, ")");
4761 r
= unit_set_description(UNIT(s
), a
);
4763 r
= unit_set_description(UNIT(s
), peer_text
);
4768 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4773 s
->socket_peer
= socket_peer_ref(peer
);
4774 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4776 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4780 static void service_reset_failed(Unit
*u
) {
4781 Service
*s
= SERVICE(u
);
4785 if (s
->state
== SERVICE_FAILED
)
4786 service_set_state(s
, service_determine_dead_state(s
));
4788 s
->result
= SERVICE_SUCCESS
;
4789 s
->reload_result
= SERVICE_SUCCESS
;
4790 s
->clean_result
= SERVICE_SUCCESS
;
4792 s
->flush_n_restarts
= false;
4795 static int service_kill(Unit
*u
, KillWho who
, int signo
, int code
, int value
, sd_bus_error
*error
) {
4796 Service
*s
= SERVICE(u
);
4800 return unit_kill_common(u
, who
, signo
, code
, value
, s
->main_pid
, s
->control_pid
, error
);
4803 static int service_main_pid(Unit
*u
) {
4804 Service
*s
= SERVICE(u
);
4811 static int service_control_pid(Unit
*u
) {
4812 Service
*s
= SERVICE(u
);
4816 return s
->control_pid
;
4819 static bool service_needs_console(Unit
*u
) {
4820 Service
*s
= SERVICE(u
);
4824 /* We provide our own implementation of this here, instead of relying of the generic implementation
4825 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4827 if (!exec_context_may_touch_console(&s
->exec_context
))
4830 return IN_SET(s
->state
,
4837 SERVICE_RELOAD_SIGNAL
,
4838 SERVICE_RELOAD_NOTIFY
,
4840 SERVICE_STOP_WATCHDOG
,
4841 SERVICE_STOP_SIGTERM
,
4842 SERVICE_STOP_SIGKILL
,
4844 SERVICE_FINAL_WATCHDOG
,
4845 SERVICE_FINAL_SIGTERM
,
4846 SERVICE_FINAL_SIGKILL
);
4849 static int service_exit_status(Unit
*u
) {
4850 Service
*s
= SERVICE(u
);
4854 if (s
->main_exec_status
.pid
<= 0 ||
4855 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4858 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4861 return s
->main_exec_status
.status
;
4864 static const char* service_status_text(Unit
*u
) {
4865 Service
*s
= SERVICE(u
);
4869 return s
->status_text
;
4872 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4873 _cleanup_strv_free_
char **l
= NULL
;
4874 bool may_clean_fdstore
= false;
4875 Service
*s
= SERVICE(u
);
4881 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4884 /* Determine if there's anything we could potentially clean */
4885 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4889 if (mask
& EXEC_CLEAN_FDSTORE
)
4890 may_clean_fdstore
= s
->n_fd_store
> 0 || s
->n_fd_store_max
> 0;
4892 if (strv_isempty(l
) && !may_clean_fdstore
)
4893 return -EUNATCH
; /* Nothing to potentially clean */
4895 /* Let's clean the stuff we can clean quickly */
4896 if (may_clean_fdstore
)
4897 service_release_fd_store(s
);
4899 /* If we are done, leave quickly */
4900 if (strv_isempty(l
)) {
4901 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4902 service_set_state(s
, SERVICE_DEAD
);
4906 /* We need to clean disk stuff. This is slow, hence do it out of process, and change state */
4907 service_unwatch_control_pid(s
);
4908 s
->clean_result
= SERVICE_SUCCESS
;
4909 s
->control_command
= NULL
;
4910 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4912 r
= service_arm_timer(s
, /* relative= */ true, s
->exec_context
.timeout_clean_usec
);
4916 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4920 service_set_state(s
, SERVICE_CLEANING
);
4925 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4926 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4927 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
4931 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4932 Service
*s
= SERVICE(u
);
4933 ExecCleanMask mask
= 0;
4939 r
= exec_context_get_clean_mask(&s
->exec_context
, &mask
);
4943 if (s
->n_fd_store_max
> 0)
4944 mask
|= EXEC_CLEAN_FDSTORE
;
4950 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4951 if (t
== JOB_START
&&
4952 result
== JOB_DONE
&&
4953 SERVICE(u
)->type
== SERVICE_ONESHOT
)
4954 return "Finished %s.";
4956 /* Fall back to generic */
4960 static int service_can_start(Unit
*u
) {
4961 Service
*s
= SERVICE(u
);
4966 /* Make sure we don't enter a busy loop of some kind. */
4967 r
= unit_test_start_limit(u
);
4969 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
4976 static void service_release_resources(Unit
*u
) {
4977 Service
*s
= SERVICE(ASSERT_PTR(u
));
4979 /* Invoked by the unit state engine, whenever it realizes that unit is dead and there's no job
4980 * anymore for it, and it hence is a good idea to release resources */
4982 /* Don't release resources if this is a transitionary failed/dead state
4983 * (i.e. SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART), insist on a permanent
4985 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
4988 log_unit_debug(u
, "Releasing resources...");
4990 service_release_socket_fd(s
);
4991 service_release_stdio_fd(s
);
4993 if (s
->fd_store_preserve_mode
!= EXEC_PRESERVE_YES
)
4994 service_release_fd_store(s
);
4996 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4997 service_set_state(s
, SERVICE_DEAD
);
5000 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
5001 [SERVICE_RESTART_NO
] = "no",
5002 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
5003 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
5004 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
5005 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
5006 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
5007 [SERVICE_RESTART_ALWAYS
] = "always",
5010 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
5012 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
5013 [SERVICE_SIMPLE
] = "simple",
5014 [SERVICE_FORKING
] = "forking",
5015 [SERVICE_ONESHOT
] = "oneshot",
5016 [SERVICE_DBUS
] = "dbus",
5017 [SERVICE_NOTIFY
] = "notify",
5018 [SERVICE_NOTIFY_RELOAD
] = "notify-reload",
5019 [SERVICE_IDLE
] = "idle",
5020 [SERVICE_EXEC
] = "exec",
5023 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
5025 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
5026 [SERVICE_EXIT_MAIN
] = "main",
5027 [SERVICE_EXIT_CGROUP
] = "cgroup",
5030 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
5032 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5033 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
5034 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
5035 [SERVICE_EXEC_START
] = "ExecStart",
5036 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
5037 [SERVICE_EXEC_RELOAD
] = "ExecReload",
5038 [SERVICE_EXEC_STOP
] = "ExecStop",
5039 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
5042 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
5044 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5045 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
5046 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
5047 [SERVICE_EXEC_START
] = "ExecStartEx",
5048 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
5049 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
5050 [SERVICE_EXEC_STOP
] = "ExecStopEx",
5051 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
5054 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
5056 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
5057 [NOTIFY_UNKNOWN
] = "unknown",
5058 [NOTIFY_READY
] = "ready",
5059 [NOTIFY_RELOADING
] = "reloading",
5060 [NOTIFY_STOPPING
] = "stopping",
5063 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
5065 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
5066 [SERVICE_SUCCESS
] = "success",
5067 [SERVICE_FAILURE_RESOURCES
] = "resources",
5068 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
5069 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
5070 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
5071 [SERVICE_FAILURE_SIGNAL
] = "signal",
5072 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
5073 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
5074 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
5075 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
5076 [SERVICE_SKIP_CONDITION
] = "exec-condition",
5079 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
5081 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
5082 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
5083 [SERVICE_TIMEOUT_ABORT
] = "abort",
5084 [SERVICE_TIMEOUT_KILL
] = "kill",
5087 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
5089 const UnitVTable service_vtable
= {
5090 .object_size
= sizeof(Service
),
5091 .exec_context_offset
= offsetof(Service
, exec_context
),
5092 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
5093 .kill_context_offset
= offsetof(Service
, kill_context
),
5094 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
5100 .private_section
= "Service",
5102 .can_transient
= true,
5103 .can_delegate
= true,
5105 .can_set_managed_oom
= true,
5107 .init
= service_init
,
5108 .done
= service_done
,
5109 .load
= service_load
,
5110 .release_resources
= service_release_resources
,
5112 .coldplug
= service_coldplug
,
5114 .dump
= service_dump
,
5116 .start
= service_start
,
5117 .stop
= service_stop
,
5118 .reload
= service_reload
,
5120 .can_reload
= service_can_reload
,
5122 .kill
= service_kill
,
5123 .clean
= service_clean
,
5124 .can_clean
= service_can_clean
,
5126 .freeze
= unit_freeze_vtable_common
,
5127 .thaw
= unit_thaw_vtable_common
,
5129 .serialize
= service_serialize
,
5130 .deserialize_item
= service_deserialize_item
,
5132 .active_state
= service_active_state
,
5133 .sub_state_to_string
= service_sub_state_to_string
,
5135 .will_restart
= service_will_restart
,
5137 .may_gc
= service_may_gc
,
5139 .sigchld_event
= service_sigchld_event
,
5141 .reset_failed
= service_reset_failed
,
5143 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
5144 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
5145 .notify_message
= service_notify_message
,
5147 .main_pid
= service_main_pid
,
5148 .control_pid
= service_control_pid
,
5150 .bus_name_owner_change
= service_bus_name_owner_change
,
5152 .bus_set_property
= bus_service_set_property
,
5153 .bus_commit_properties
= bus_service_commit_properties
,
5155 .get_timeout
= service_get_timeout
,
5156 .get_timeout_start_usec
= service_get_timeout_start_usec
,
5157 .needs_console
= service_needs_console
,
5158 .exit_status
= service_exit_status
,
5159 .status_text
= service_status_text
,
5161 .status_message_formats
= {
5162 .finished_start_job
= {
5163 [JOB_FAILED
] = "Failed to start %s.",
5165 .finished_stop_job
= {
5166 [JOB_DONE
] = "Stopped %s.",
5167 [JOB_FAILED
] = "Stopped (with error) %s.",
5169 .finished_job
= service_finished_job
,
5172 .can_start
= service_can_start
,
5174 .notify_plymouth
= true,
5176 .audit_start_message_type
= AUDIT_SERVICE_START
,
5177 .audit_stop_message_type
= AUDIT_SERVICE_STOP
,