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
= (usec_t
) (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 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
753 static void service_fix_stdio(Service
*s
) {
756 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
757 * default value that is subject to automatic overriding triggered by other settings and an explicit
758 * choice the user can make. We don't distinguish between these cases currently. */
760 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
761 s
->exec_context
.stdin_data_size
> 0)
762 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
764 if (IN_SET(s
->exec_context
.std_input
,
766 EXEC_INPUT_TTY_FORCE
,
769 EXEC_INPUT_NAMED_FD
))
772 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
773 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
774 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
775 * duplicated for both input and output at the same time (since they then would cause a feedback
776 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
778 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
779 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
780 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
782 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
783 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
786 static int service_setup_bus_name(Service
*s
) {
791 /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */
795 if (s
->type
== SERVICE_DBUS
) {
796 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
798 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
800 /* We always want to be ordered against dbus.socket if both are in the transaction. */
801 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, 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");
806 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
808 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
810 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
815 static int service_add_extras(Service
*s
) {
820 if (s
->type
== _SERVICE_TYPE_INVALID
) {
821 /* Figure out a type automatically */
823 s
->type
= SERVICE_DBUS
;
824 else if (s
->exec_command
[SERVICE_EXEC_START
])
825 s
->type
= SERVICE_SIMPLE
;
827 s
->type
= SERVICE_ONESHOT
;
830 /* Oneshot services have disabled start timeout by default */
831 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
832 s
->timeout_start_usec
= USEC_INFINITY
;
834 service_fix_stdio(s
);
836 r
= unit_patch_contexts(UNIT(s
));
840 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
844 r
= unit_set_default_slice(UNIT(s
));
848 /* If the service needs the notify socket, let's enable it automatically. */
849 if (s
->notify_access
== NOTIFY_NONE
&&
850 (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) || s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
851 s
->notify_access
= NOTIFY_MAIN
;
853 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
854 * delegation is on, in that case it we assume the payload knows better what to do and can process
855 * things in a more focused way. */
856 if (s
->oom_policy
< 0)
857 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
859 /* Let the kernel do the killing if that's requested. */
860 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
862 r
= service_add_default_dependencies(s
);
866 r
= service_setup_bus_name(s
);
873 static int service_load(Unit
*u
) {
874 Service
*s
= SERVICE(u
);
877 r
= unit_load_fragment_and_dropin(u
, true);
881 if (u
->load_state
!= UNIT_LOADED
)
884 /* This is a new unit? Then let's add in some extras */
885 r
= service_add_extras(s
);
889 return service_verify(s
);
892 static void service_dump_fdstore(Service
*s
, FILE *f
, const char *prefix
) {
897 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
898 _cleanup_free_
char *path
= NULL
;
902 if (fstat(i
->fd
, &st
) < 0) {
903 log_debug_errno(errno
, "Failed to stat fdstore entry: %m");
907 flags
= fcntl(i
->fd
, F_GETFL
);
909 log_debug_errno(errno
, "Failed to get fdstore entry flags: %m");
913 (void) fd_get_path(i
->fd
, &path
);
916 "%s%s '%s' (type=%s; dev=" DEVNUM_FORMAT_STR
"; inode=%" PRIu64
"; rdev=" DEVNUM_FORMAT_STR
"; path=%s; access=%s)\n",
917 prefix
, i
== s
->fd_store
? "File Descriptor Store Entry:" : " ",
919 inode_type_to_string(st
.st_mode
),
920 DEVNUM_FORMAT_VAL(st
.st_dev
),
921 (uint64_t) st
.st_ino
,
922 DEVNUM_FORMAT_VAL(st
.st_rdev
),
924 accmode_to_string(flags
));
928 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
929 Service
*s
= SERVICE(u
);
934 prefix
= strempty(prefix
);
935 prefix2
= strjoina(prefix
, "\t");
938 "%sService State: %s\n"
940 "%sReload Result: %s\n"
941 "%sClean Result: %s\n"
942 "%sPermissionsStartOnly: %s\n"
943 "%sRootDirectoryStartOnly: %s\n"
944 "%sRemainAfterExit: %s\n"
945 "%sGuessMainPID: %s\n"
948 "%sNotifyAccess: %s\n"
949 "%sNotifyState: %s\n"
951 "%sReloadSignal: %s\n",
952 prefix
, service_state_to_string(s
->state
),
953 prefix
, service_result_to_string(s
->result
),
954 prefix
, service_result_to_string(s
->reload_result
),
955 prefix
, service_result_to_string(s
->clean_result
),
956 prefix
, yes_no(s
->permissions_start_only
),
957 prefix
, yes_no(s
->root_directory_start_only
),
958 prefix
, yes_no(s
->remain_after_exit
),
959 prefix
, yes_no(s
->guess_main_pid
),
960 prefix
, service_type_to_string(s
->type
),
961 prefix
, service_restart_to_string(s
->restart
),
962 prefix
, notify_access_to_string(service_get_notify_access(s
)),
963 prefix
, notify_state_to_string(s
->notify_state
),
964 prefix
, oom_policy_to_string(s
->oom_policy
),
965 prefix
, signal_to_string(s
->reload_signal
));
967 if (s
->control_pid
> 0)
969 "%sControl PID: "PID_FMT
"\n",
970 prefix
, s
->control_pid
);
974 "%sMain PID: "PID_FMT
"\n"
975 "%sMain PID Known: %s\n"
976 "%sMain PID Alien: %s\n",
978 prefix
, yes_no(s
->main_pid_known
),
979 prefix
, yes_no(s
->main_pid_alien
));
984 prefix
, s
->pid_file
);
989 "%sBus Name Good: %s\n",
991 prefix
, yes_no(s
->bus_name_good
));
993 if (UNIT_ISSET(s
->accept_socket
))
995 "%sAccept Socket: %s\n",
996 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
1000 "%sRestartSteps: %u\n"
1001 "%sRestartMaxDelaySec: %s\n"
1002 "%sTimeoutStartSec: %s\n"
1003 "%sTimeoutStopSec: %s\n"
1004 "%sTimeoutStartFailureMode: %s\n"
1005 "%sTimeoutStopFailureMode: %s\n",
1006 prefix
, FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
),
1007 prefix
, s
->restart_steps
,
1008 prefix
, FORMAT_TIMESPAN(s
->restart_max_delay_usec
, USEC_PER_SEC
),
1009 prefix
, FORMAT_TIMESPAN(s
->timeout_start_usec
, USEC_PER_SEC
),
1010 prefix
, FORMAT_TIMESPAN(s
->timeout_stop_usec
, USEC_PER_SEC
),
1011 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
1012 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
1014 if (s
->timeout_abort_set
)
1016 "%sTimeoutAbortSec: %s\n",
1017 prefix
, FORMAT_TIMESPAN(s
->timeout_abort_usec
, USEC_PER_SEC
));
1020 "%sRuntimeMaxSec: %s\n"
1021 "%sRuntimeRandomizedExtraSec: %s\n"
1022 "%sWatchdogSec: %s\n",
1023 prefix
, FORMAT_TIMESPAN(s
->runtime_max_usec
, USEC_PER_SEC
),
1024 prefix
, FORMAT_TIMESPAN(s
->runtime_rand_extra_usec
, USEC_PER_SEC
),
1025 prefix
, FORMAT_TIMESPAN(s
->watchdog_usec
, USEC_PER_SEC
));
1027 kill_context_dump(&s
->kill_context
, f
, prefix
);
1028 exec_context_dump(&s
->exec_context
, f
, prefix
);
1030 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
1031 if (!s
->exec_command
[c
])
1034 fprintf(f
, "%s-> %s:\n",
1035 prefix
, service_exec_command_to_string(c
));
1037 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
1041 fprintf(f
, "%sStatus Text: %s\n",
1042 prefix
, s
->status_text
);
1044 if (s
->n_fd_store_max
> 0)
1046 "%sFile Descriptor Store Max: %u\n"
1047 "%sFile Descriptor Store Pin: %s\n"
1048 "%sFile Descriptor Store Current: %zu\n",
1049 prefix
, s
->n_fd_store_max
,
1050 prefix
, exec_preserve_mode_to_string(s
->fd_store_preserve_mode
),
1051 prefix
, s
->n_fd_store
);
1053 service_dump_fdstore(s
, f
, prefix
);
1056 LIST_FOREACH(open_files
, of
, s
->open_files
) {
1057 _cleanup_free_
char *ofs
= NULL
;
1060 r
= open_file_to_string(of
, &ofs
);
1063 "Failed to convert OpenFile= setting to string, ignoring: %m");
1067 fprintf(f
, "%sOpen File: %s\n", prefix
, ofs
);
1070 cgroup_context_dump(UNIT(s
), f
, prefix
);
1073 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
1077 assert(pid_is_valid(pid
));
1079 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
1080 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
1083 if (pid
== getpid_cached() || pid
== 1)
1084 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
1086 if (pid
== s
->control_pid
)
1087 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
1089 if (!pid_is_alive(pid
))
1090 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
1092 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
1093 if (owner
== UNIT(s
)) {
1094 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
1095 return 1; /* Yay, it's definitely a good PID */
1098 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
1101 static int service_load_pid_file(Service
*s
, bool may_warn
) {
1102 bool questionable_pid_file
= false;
1103 _cleanup_free_
char *k
= NULL
;
1104 _cleanup_close_
int fd
= -EBADF
;
1113 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
1115 r
= chase(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
1116 if (r
== -ENOLINK
) {
1117 log_unit_debug_errno(UNIT(s
), r
,
1118 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
1120 questionable_pid_file
= true;
1122 r
= chase(s
->pid_file
, NULL
, 0, NULL
, &fd
);
1125 return log_unit_full_errno(UNIT(s
), prio
, r
,
1126 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
1128 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
1129 * chase() returned us into a proper fd first. */
1130 r
= read_one_line_file(FORMAT_PROC_FD_PATH(fd
), &k
);
1132 return log_unit_error_errno(UNIT(s
), r
,
1133 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
1136 r
= parse_pid(k
, &pid
);
1138 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
1140 if (s
->main_pid_known
&& pid
== s
->main_pid
)
1143 r
= service_is_suitable_main_pid(s
, pid
, prio
);
1149 if (questionable_pid_file
)
1150 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1151 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1153 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1155 if (fstat(fd
, &st
) < 0)
1156 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1159 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1160 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
1162 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
);
1165 if (s
->main_pid_known
) {
1166 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1168 service_unwatch_main_pid(s
);
1169 s
->main_pid_known
= false;
1171 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1173 r
= service_set_main_pid(s
, pid
);
1177 r
= unit_watch_pid(UNIT(s
), pid
, false);
1178 if (r
< 0) /* FIXME: we need to do something here */
1179 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1184 static void service_search_main_pid(Service
*s
) {
1190 /* If we know it anyway, don't ever fall back to unreliable
1192 if (s
->main_pid_known
)
1195 if (!s
->guess_main_pid
)
1198 assert(s
->main_pid
<= 0);
1200 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1203 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1204 if (service_set_main_pid(s
, pid
) < 0)
1207 r
= unit_watch_pid(UNIT(s
), pid
, false);
1209 /* FIXME: we need to do something here */
1210 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1213 static void service_set_state(Service
*s
, ServiceState state
) {
1214 ServiceState old_state
;
1215 const UnitActiveState
*table
;
1219 if (s
->state
!= state
)
1220 bus_unit_send_pending_change_signal(UNIT(s
), false);
1222 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1224 old_state
= s
->state
;
1227 service_unwatch_pid_file(s
);
1230 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1232 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1233 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1234 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1235 SERVICE_AUTO_RESTART
,
1237 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1240 SERVICE_START
, SERVICE_START_POST
,
1242 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1243 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1244 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1245 service_unwatch_main_pid(s
);
1246 s
->main_command
= NULL
;
1250 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1251 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1252 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1253 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1254 SERVICE_CLEANING
)) {
1255 service_unwatch_control_pid(s
);
1256 s
->control_command
= NULL
;
1257 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1261 SERVICE_DEAD
, SERVICE_FAILED
,
1262 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
,
1263 SERVICE_DEAD_RESOURCES_PINNED
)) {
1264 unit_unwatch_all_pids(UNIT(s
));
1265 unit_dequeue_rewatch_pids(UNIT(s
));
1268 if (state
!= SERVICE_START
)
1269 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
1271 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1272 service_stop_watchdog(s
);
1274 /* For the inactive states unit_notify() will trim the cgroup,
1275 * but for exit we have to do that ourselves... */
1276 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1277 unit_prune_cgroup(UNIT(s
));
1279 if (old_state
!= state
)
1280 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1282 unit_notify(UNIT(s
), table
[old_state
], table
[state
], s
->reload_result
== SERVICE_SUCCESS
);
1285 static usec_t
service_coldplug_timeout(Service
*s
) {
1288 switch (s
->deserialized_state
) {
1290 case SERVICE_CONDITION
:
1291 case SERVICE_START_PRE
:
1293 case SERVICE_START_POST
:
1294 case SERVICE_RELOAD
:
1295 case SERVICE_RELOAD_SIGNAL
:
1296 case SERVICE_RELOAD_NOTIFY
:
1297 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1299 case SERVICE_RUNNING
:
1300 return service_running_timeout(s
);
1303 case SERVICE_STOP_SIGTERM
:
1304 case SERVICE_STOP_SIGKILL
:
1305 case SERVICE_STOP_POST
:
1306 case SERVICE_FINAL_SIGTERM
:
1307 case SERVICE_FINAL_SIGKILL
:
1308 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1310 case SERVICE_STOP_WATCHDOG
:
1311 case SERVICE_FINAL_WATCHDOG
:
1312 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1314 case SERVICE_AUTO_RESTART
:
1315 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, service_restart_usec_next(s
));
1317 case SERVICE_CLEANING
:
1318 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1321 return USEC_INFINITY
;
1325 static int service_coldplug(Unit
*u
) {
1326 Service
*s
= SERVICE(u
);
1330 assert(s
->state
== SERVICE_DEAD
);
1332 if (s
->deserialized_state
== s
->state
)
1335 r
= service_arm_timer(s
, /* relative= */ false, service_coldplug_timeout(s
));
1339 if (s
->main_pid
> 0 &&
1340 pid_is_unwaited(s
->main_pid
) &&
1341 (IN_SET(s
->deserialized_state
,
1342 SERVICE_START
, SERVICE_START_POST
,
1344 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1345 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1346 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1347 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1352 if (s
->control_pid
> 0 &&
1353 pid_is_unwaited(s
->control_pid
) &&
1354 IN_SET(s
->deserialized_state
,
1355 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1356 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1357 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1358 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1359 SERVICE_CLEANING
)) {
1360 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1365 if (!IN_SET(s
->deserialized_state
,
1366 SERVICE_DEAD
, SERVICE_FAILED
,
1367 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
,
1369 SERVICE_DEAD_RESOURCES_PINNED
)) {
1370 (void) unit_enqueue_rewatch_pids(u
);
1371 (void) unit_setup_exec_runtime(u
);
1374 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1375 service_start_watchdog(s
);
1377 if (UNIT_ISSET(s
->accept_socket
)) {
1378 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1380 if (socket
->max_connections_per_source
> 0) {
1383 /* Make a best-effort attempt at bumping the connection count */
1384 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1385 socket_peer_unref(s
->socket_peer
);
1386 s
->socket_peer
= peer
;
1391 service_set_state(s
, s
->deserialized_state
);
1395 static int service_collect_fds(
1399 size_t *n_socket_fds
,
1400 size_t *n_storage_fds
) {
1402 _cleanup_strv_free_
char **rfd_names
= NULL
;
1403 _cleanup_free_
int *rfds
= NULL
;
1404 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1410 assert(n_socket_fds
);
1411 assert(n_storage_fds
);
1413 if (s
->socket_fd
>= 0) {
1415 /* Pass the per-connection socket */
1417 rfds
= newdup(int, &s
->socket_fd
, 1);
1421 rfd_names
= strv_new("connection");
1429 /* Pass all our configured sockets for singleton services */
1431 UNIT_FOREACH_DEPENDENCY(u
, UNIT(s
), UNIT_ATOM_TRIGGERED_BY
) {
1432 _cleanup_free_
int *cfds
= NULL
;
1436 if (u
->type
!= UNIT_SOCKET
)
1441 cn_fds
= socket_collect_fds(sock
, &cfds
);
1449 rfds
= TAKE_PTR(cfds
);
1450 rn_socket_fds
= cn_fds
;
1454 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1458 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1461 rn_socket_fds
+= cn_fds
;
1464 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1470 if (s
->n_fd_store
> 0) {
1475 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1481 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1486 n_fds
= rn_socket_fds
;
1488 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1489 rfds
[n_fds
] = fs
->fd
;
1490 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1491 if (!rfd_names
[n_fds
])
1498 rfd_names
[n_fds
] = NULL
;
1501 *fds
= TAKE_PTR(rfds
);
1502 *fd_names
= TAKE_PTR(rfd_names
);
1503 *n_socket_fds
= rn_socket_fds
;
1504 *n_storage_fds
= rn_storage_fds
;
1509 static int service_allocate_exec_fd_event_source(
1512 sd_event_source
**ret_event_source
) {
1514 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1519 assert(ret_event_source
);
1521 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1523 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1525 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1527 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1529 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1531 (void) sd_event_source_set_description(source
, "service exec_fd");
1533 r
= sd_event_source_set_io_fd_own(source
, true);
1535 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1537 *ret_event_source
= TAKE_PTR(source
);
1541 static int service_allocate_exec_fd(
1543 sd_event_source
**ret_event_source
,
1546 _cleanup_close_pair_
int p
[] = PIPE_EBADF
;
1550 assert(ret_event_source
);
1551 assert(ret_exec_fd
);
1553 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1554 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1556 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1561 *ret_exec_fd
= TAKE_FD(p
[1]);
1566 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1569 /* Notifications are accepted depending on the process and
1570 * the access setting of the service:
1571 * process: \ access: NONE MAIN EXEC ALL
1572 * main no yes yes yes
1573 * control no no yes yes
1574 * other (forked) no no no yes */
1576 if (flags
& EXEC_IS_CONTROL
)
1577 /* A control process */
1578 return IN_SET(service_get_notify_access(s
), NOTIFY_EXEC
, NOTIFY_ALL
);
1580 /* We only spawn main processes and control processes, so any
1581 * process that is not a control process is a main process */
1582 return service_get_notify_access(s
) != NOTIFY_NONE
;
1585 static Service
*service_get_triggering_service(Service
*s
) {
1586 Unit
*candidate
= NULL
, *other
;
1590 /* Return the service which triggered service 's', this means dependency
1591 * types which include the UNIT_ATOM_ON_{FAILURE,SUCCESS}_OF atoms.
1593 * N.B. if there are multiple services which could trigger 's' via OnFailure=
1594 * or OnSuccess= then we return NULL. This is since we don't know from which
1595 * one to propagate the exit status. */
1597 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_FAILURE_OF
) {
1603 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_SUCCESS_OF
) {
1609 return SERVICE(candidate
);
1612 log_unit_warning(UNIT(s
), "multiple trigger source candidates for exit status propagation (%s, %s), skipping.",
1613 candidate
->id
, other
->id
);
1617 static int service_spawn_internal(
1625 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1628 .stdout_fd
= -EBADF
,
1629 .stderr_fd
= -EBADF
,
1632 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1633 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1643 log_unit_debug(UNIT(s
), "Will spawn child (%s): %s", caller
, c
->path
);
1645 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1649 assert(!s
->exec_fd_event_source
);
1651 if (flags
& EXEC_IS_CONTROL
) {
1652 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1653 if (s
->permissions_start_only
)
1654 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1655 if (s
->root_directory_start_only
)
1656 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1659 if ((flags
& EXEC_PASS_FDS
) ||
1660 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1661 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1662 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1664 r
= service_collect_fds(s
,
1666 &exec_params
.fd_names
,
1667 &exec_params
.n_socket_fds
,
1668 &exec_params
.n_storage_fds
);
1672 exec_params
.open_files
= s
->open_files
;
1674 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1677 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1678 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1683 r
= service_arm_timer(s
, /* relative= */ true, timeout
);
1687 our_env
= new0(char*, 13);
1691 if (service_exec_needs_notify_socket(s
, flags
)) {
1692 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1695 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1697 if (s
->n_fd_store_max
> 0)
1698 if (asprintf(our_env
+ n_env
++, "FDSTORE=%u", s
->n_fd_store_max
) < 0)
1702 if (s
->main_pid
> 0)
1703 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1706 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1707 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1711 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1714 if (s
->socket_fd
>= 0) {
1715 union sockaddr_union sa
;
1716 socklen_t salen
= sizeof(sa
);
1718 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1719 * useful. Note that we do this only when we are still connected at this point in time, which we might
1720 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1721 * in ENOTCONN), and just use whate we can use. */
1723 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1724 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1725 _cleanup_free_
char *addr
= NULL
;
1729 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1733 t
= strjoin("REMOTE_ADDR=", addr
);
1736 our_env
[n_env
++] = t
;
1738 r
= sockaddr_port(&sa
.sa
, &port
);
1742 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1744 our_env
[n_env
++] = t
;
1748 Service
*env_source
= NULL
;
1749 const char *monitor_prefix
;
1750 if (flags
& EXEC_SETENV_RESULT
) {
1752 monitor_prefix
= "";
1753 } else if (flags
& EXEC_SETENV_MONITOR_RESULT
) {
1754 env_source
= service_get_triggering_service(s
);
1755 monitor_prefix
= "MONITOR_";
1759 if (asprintf(our_env
+ n_env
++, "%sSERVICE_RESULT=%s", monitor_prefix
, service_result_to_string(env_source
->result
)) < 0)
1762 if (env_source
->main_exec_status
.pid
> 0 &&
1763 dual_timestamp_is_set(&env_source
->main_exec_status
.exit_timestamp
)) {
1764 if (asprintf(our_env
+ n_env
++, "%sEXIT_CODE=%s", monitor_prefix
, sigchld_code_to_string(env_source
->main_exec_status
.code
)) < 0)
1767 if (env_source
->main_exec_status
.code
== CLD_EXITED
)
1768 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%i", monitor_prefix
, env_source
->main_exec_status
.status
);
1770 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%s", monitor_prefix
, signal_to_string(env_source
->main_exec_status
.status
));
1776 if (env_source
!= s
) {
1777 if (!sd_id128_is_null(UNIT(env_source
)->invocation_id
)) {
1778 r
= asprintf(our_env
+ n_env
++, "%sINVOCATION_ID=" SD_ID128_FORMAT_STR
,
1779 monitor_prefix
, SD_ID128_FORMAT_VAL(UNIT(env_source
)->invocation_id
));
1784 if (asprintf(our_env
+ n_env
++, "%sUNIT=%s", monitor_prefix
, UNIT(env_source
)->id
) < 0)
1789 if (UNIT(s
)->activation_details
) {
1790 r
= activation_details_append_env(UNIT(s
)->activation_details
, &our_env
);
1793 /* The number of env vars added here can vary, rather than keeping the allocation block in
1794 * sync manually, these functions simply use the strv methods to append to it, so we need
1795 * to update n_env when we are done in case of future usage. */
1799 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1803 final_env
= strv_env_merge(exec_params
.environment
, our_env
);
1807 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1808 SET_FLAG(exec_params
.flags
, EXEC_NSS_DYNAMIC_BYPASS
,
1809 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1811 strv_free_and_replace(exec_params
.environment
, final_env
);
1812 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1813 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1814 if (s
->type
== SERVICE_IDLE
)
1815 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1816 exec_params
.stdin_fd
= s
->stdin_fd
;
1817 exec_params
.stdout_fd
= s
->stdout_fd
;
1818 exec_params
.stderr_fd
= s
->stderr_fd
;
1820 r
= exec_spawn(UNIT(s
),
1830 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1831 s
->exec_fd_hot
= false;
1833 r
= unit_watch_pid(UNIT(s
), pid
, true);
1842 static int main_pid_good(Service
*s
) {
1845 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1847 /* If we know the pid file, then let's just check if it is
1849 if (s
->main_pid_known
) {
1851 /* If it's an alien child let's check if it is still
1853 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1854 return pid_is_alive(s
->main_pid
);
1856 /* .. otherwise assume we'll get a SIGCHLD for it,
1857 * which we really should wait for to collect exit
1858 * status and code */
1859 return s
->main_pid
> 0;
1862 /* We don't know the pid */
1866 static int control_pid_good(Service
*s
) {
1869 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1870 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1871 * means: we can't figure it out. */
1873 return s
->control_pid
> 0;
1876 static int cgroup_good(Service
*s
) {
1881 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1884 if (!UNIT(s
)->cgroup_path
)
1887 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1894 static bool service_shall_restart(Service
*s
, const char **reason
) {
1897 /* Don't restart after manual stops */
1898 if (s
->forbid_restart
) {
1899 *reason
= "manual stop";
1903 /* Never restart if this is configured as special exception */
1904 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1905 *reason
= "prevented by exit status";
1909 /* Restart if the exit code/status are configured as restart triggers */
1910 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1911 *reason
= "forced by exit status";
1915 *reason
= "restart setting";
1916 switch (s
->restart
) {
1918 case SERVICE_RESTART_NO
:
1921 case SERVICE_RESTART_ALWAYS
:
1922 return s
->result
!= SERVICE_SKIP_CONDITION
;
1924 case SERVICE_RESTART_ON_SUCCESS
:
1925 return s
->result
== SERVICE_SUCCESS
;
1927 case SERVICE_RESTART_ON_FAILURE
:
1928 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1930 case SERVICE_RESTART_ON_ABNORMAL
:
1931 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1933 case SERVICE_RESTART_ON_WATCHDOG
:
1934 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1936 case SERVICE_RESTART_ON_ABORT
:
1937 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1940 assert_not_reached();
1944 static bool service_will_restart(Unit
*u
) {
1945 Service
*s
= SERVICE(u
);
1949 if (IN_SET(s
->state
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
))
1952 return unit_will_restart_default(u
);
1955 static ServiceState
service_determine_dead_state(Service
*s
) {
1958 return s
->fd_store
&& s
->fd_store_preserve_mode
== EXEC_PRESERVE_YES
? SERVICE_DEAD_RESOURCES_PINNED
: SERVICE_DEAD
;
1961 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1962 ServiceState end_state
, restart_state
;
1967 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1968 * undo what has already been enqueued. */
1969 if (unit_stop_pending(UNIT(s
)))
1970 allow_restart
= false;
1972 if (s
->result
== SERVICE_SUCCESS
)
1975 if (s
->result
== SERVICE_SUCCESS
) {
1976 unit_log_success(UNIT(s
));
1977 end_state
= service_determine_dead_state(s
);
1978 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1979 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1980 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1981 end_state
= service_determine_dead_state(s
);
1982 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1984 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1985 end_state
= SERVICE_FAILED
;
1986 restart_state
= SERVICE_FAILED_BEFORE_AUTO_RESTART
;
1988 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1991 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1995 allow_restart
= service_shall_restart(s
, &reason
);
1996 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1997 allow_restart
? "" : "not ",
2001 if (allow_restart
) {
2002 /* We make two state changes here: one that maps to the high-level UNIT_INACTIVE/UNIT_FAILED
2003 * state (i.e. a state indicating deactivation), and then one that that maps to the
2004 * high-level UNIT_STARTING state (i.e. a state indicating activation). We do this so that
2005 * external software can watch the state changes and see all service failures, even if they
2006 * are only transitionary and followed by an automatic restart. We have fine-grained
2007 * low-level states for this though so that software can distinguish the permanent UNIT_INACTIVE
2008 * state from this transitionary UNIT_INACTIVE state by looking at the low-level states. */
2009 if (s
->restart_mode
!= SERVICE_RESTART_MODE_DIRECT
)
2010 service_set_state(s
, restart_state
);
2012 r
= service_arm_timer(s
, /* relative= */ true, service_restart_usec_next(s
));
2016 service_set_state(s
, SERVICE_AUTO_RESTART
);
2018 service_set_state(s
, end_state
);
2020 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
2021 * user can still introspect the counter. Do so on the next start. */
2022 s
->flush_n_restarts
= true;
2025 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
2026 * queue, so that the fd store is possibly gc'ed again */
2027 unit_add_to_gc_queue(UNIT(s
));
2029 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
2030 s
->forbid_restart
= false;
2032 /* Reset NotifyAccess override */
2033 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2035 /* We want fresh tmpdirs and ephemeral snapshots in case the service is started again immediately. */
2036 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2038 /* Also, remove the runtime directory */
2039 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2041 /* Also get rid of the fd store, if that's configured. */
2042 if (s
->fd_store_preserve_mode
== EXEC_PRESERVE_NO
)
2043 service_release_fd_store(s
);
2045 /* Get rid of the IPC bits of the user */
2046 unit_unref_uid_gid(UNIT(s
), true);
2048 /* Try to delete the pid file. At this point it will be
2049 * out-of-date, and some software might be confused by it, so
2050 * let's remove it. */
2052 (void) unlink(s
->pid_file
);
2054 /* Reset TTY ownership if necessary */
2055 exec_context_revert_tty(&s
->exec_context
);
2060 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
2061 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2064 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
2068 if (s
->result
== SERVICE_SUCCESS
)
2071 service_unwatch_control_pid(s
);
2072 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2074 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
2075 if (s
->control_command
) {
2076 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
2078 r
= service_spawn(s
,
2080 s
->timeout_stop_usec
,
2081 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2086 service_set_state(s
, SERVICE_STOP_POST
);
2088 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
2093 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
2094 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2097 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
2100 case SERVICE_STOP_WATCHDOG
:
2101 case SERVICE_FINAL_WATCHDOG
:
2102 return KILL_WATCHDOG
;
2104 case SERVICE_STOP_SIGTERM
:
2105 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
2106 return KILL_RESTART
;
2109 case SERVICE_FINAL_SIGTERM
:
2110 return KILL_TERMINATE
;
2112 case SERVICE_STOP_SIGKILL
:
2113 case SERVICE_FINAL_SIGKILL
:
2117 return _KILL_OPERATION_INVALID
;
2121 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
2122 int kill_operation
, r
;
2126 if (s
->result
== SERVICE_SUCCESS
)
2129 /* Before sending any signal, make sure we track all members of this cgroup */
2130 (void) unit_watch_all_pids(UNIT(s
));
2132 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
2134 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2136 kill_operation
= state_to_kill_operation(s
, state
);
2137 r
= unit_kill_context(
2148 r
= service_arm_timer(s
, /* relative= */ true,
2149 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
);
2153 service_set_state(s
, state
);
2154 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
2155 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
2156 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2157 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2158 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
2159 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2161 service_enter_dead(s
, SERVICE_SUCCESS
, true);
2166 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2168 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2169 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
2171 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2174 static void service_enter_stop_by_notify(Service
*s
) {
2177 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2179 service_arm_timer(s
, /* relative= */ true, s
->timeout_stop_usec
);
2181 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
2182 service_set_state(s
, SERVICE_STOP_SIGTERM
);
2185 static void service_enter_stop(Service
*s
, ServiceResult f
) {
2190 if (s
->result
== SERVICE_SUCCESS
)
2193 service_unwatch_control_pid(s
);
2194 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2196 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
2197 if (s
->control_command
) {
2198 s
->control_command_id
= SERVICE_EXEC_STOP
;
2200 r
= service_spawn(s
,
2202 s
->timeout_stop_usec
,
2203 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2208 service_set_state(s
, SERVICE_STOP
);
2210 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2215 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
2216 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2219 static bool service_good(Service
*s
) {
2223 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
2226 main_pid_ok
= main_pid_good(s
);
2227 if (main_pid_ok
> 0) /* It's alive */
2229 if (main_pid_ok
== 0) /* It's dead */
2232 /* OK, we don't know anything about the main PID, maybe
2233 * because there is none. Let's check the control group
2236 return cgroup_good(s
) != 0;
2239 static void service_enter_running(Service
*s
, ServiceResult f
) {
2242 if (s
->result
== SERVICE_SUCCESS
)
2245 service_unwatch_control_pid(s
);
2247 if (s
->result
!= SERVICE_SUCCESS
)
2248 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2249 else if (service_good(s
)) {
2251 /* If there are any queued up sd_notify() notifications, process them now */
2252 if (s
->notify_state
== NOTIFY_RELOADING
)
2253 service_enter_reload_by_notify(s
);
2254 else if (s
->notify_state
== NOTIFY_STOPPING
)
2255 service_enter_stop_by_notify(s
);
2257 service_set_state(s
, SERVICE_RUNNING
);
2258 service_arm_timer(s
, /* relative= */ false, service_running_timeout(s
));
2261 } else if (s
->remain_after_exit
)
2262 service_set_state(s
, SERVICE_EXITED
);
2264 service_enter_stop(s
, SERVICE_SUCCESS
);
2267 static void service_enter_start_post(Service
*s
) {
2271 service_unwatch_control_pid(s
);
2272 service_reset_watchdog(s
);
2274 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2275 if (s
->control_command
) {
2276 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2278 r
= service_spawn(s
,
2280 s
->timeout_start_usec
,
2281 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2286 service_set_state(s
, SERVICE_START_POST
);
2288 service_enter_running(s
, SERVICE_SUCCESS
);
2293 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2294 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2297 static void service_kill_control_process(Service
*s
) {
2302 if (s
->control_pid
<= 0)
2305 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2307 _cleanup_free_
char *comm
= NULL
;
2309 (void) get_process_comm(s
->control_pid
, &comm
);
2311 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2312 s
->control_pid
, strna(comm
));
2316 static int service_adverse_to_leftover_processes(Service
*s
) {
2319 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2320 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2321 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2322 * time is quite variable (so Timeout settings aren't of use).
2324 * Here we take these two factors and refuse to start a service if there are existing processes
2325 * within a control group. Databases, while generally having some protection against multiple
2326 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2327 * aren't as rigoriously written to protect aganst against multiple use. */
2329 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2330 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2331 !s
->kill_context
.send_sigkill
)
2332 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2333 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2338 static void service_enter_start(Service
*s
) {
2346 service_unwatch_control_pid(s
);
2347 service_unwatch_main_pid(s
);
2349 r
= service_adverse_to_leftover_processes(s
);
2353 if (s
->type
== SERVICE_FORKING
) {
2354 s
->control_command_id
= SERVICE_EXEC_START
;
2355 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2357 s
->main_command
= NULL
;
2359 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2360 s
->control_command
= NULL
;
2362 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2366 if (s
->type
!= SERVICE_ONESHOT
) {
2367 /* There's no command line configured for the main command? Hmm, that is strange.
2368 * This can only happen if the configuration changes at runtime. In this case,
2369 * let's enter a failure state. */
2370 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2374 /* We force a fake state transition here. Otherwise, the unit would go directly from
2375 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2376 * in between. This way we can later trigger actions that depend on the state
2377 * transition, including SuccessAction=. */
2378 service_set_state(s
, SERVICE_START
);
2380 service_enter_start_post(s
);
2384 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2385 /* For simple + idle this is the main process. We don't apply any timeout here, but
2386 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2387 timeout
= USEC_INFINITY
;
2389 timeout
= s
->timeout_start_usec
;
2391 r
= service_spawn(s
,
2394 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
|EXEC_SETENV_MONITOR_RESULT
,
2399 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2400 /* For simple services we immediately start
2401 * the START_POST binaries. */
2403 (void) service_set_main_pid(s
, pid
);
2404 service_enter_start_post(s
);
2406 } else if (s
->type
== SERVICE_FORKING
) {
2408 /* For forking services we wait until the start
2409 * process exited. */
2411 s
->control_pid
= pid
;
2412 service_set_state(s
, SERVICE_START
);
2414 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
, SERVICE_EXEC
)) {
2416 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2418 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2419 * bus. 'notify' and 'exec' services are similar. */
2421 (void) service_set_main_pid(s
, pid
);
2422 service_set_state(s
, SERVICE_START
);
2424 assert_not_reached();
2429 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2430 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2433 static void service_enter_start_pre(Service
*s
) {
2438 service_unwatch_control_pid(s
);
2440 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2441 if (s
->control_command
) {
2443 r
= service_adverse_to_leftover_processes(s
);
2447 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2449 r
= service_spawn(s
,
2451 s
->timeout_start_usec
,
2452 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2457 service_set_state(s
, SERVICE_START_PRE
);
2459 service_enter_start(s
);
2464 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2465 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2468 static void service_enter_condition(Service
*s
) {
2473 service_unwatch_control_pid(s
);
2475 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2476 if (s
->control_command
) {
2478 r
= service_adverse_to_leftover_processes(s
);
2482 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2484 r
= service_spawn(s
,
2486 s
->timeout_start_usec
,
2487 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2493 service_set_state(s
, SERVICE_CONDITION
);
2495 service_enter_start_pre(s
);
2500 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2501 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2504 static void service_enter_restart(Service
*s
) {
2505 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2510 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2511 /* Don't restart things if we are going down anyway */
2512 log_unit_info(UNIT(s
), "Stop job pending for unit, skipping automatic restart.");
2516 /* Any units that are bound to this service must also be restarted. We use JOB_START for ourselves
2517 * but then set JOB_RESTART_DEPENDENCIES which will enqueue JOB_RESTART for those dependency jobs. */
2518 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, UNIT(s
), JOB_RESTART_DEPENDENCIES
, NULL
, &error
, NULL
);
2522 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't
2523 * fully stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset
2524 * the counter explicitly however via the usual "systemctl reset-failure" logic. */
2526 s
->flush_n_restarts
= false;
2528 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2530 log_unit_struct(UNIT(s
), LOG_INFO
,
2531 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2532 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2533 LOG_UNIT_MESSAGE(UNIT(s
),
2534 "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2535 "N_RESTARTS=%u", s
->n_restarts
);
2537 service_set_state(s
, SERVICE_AUTO_RESTART_QUEUED
);
2539 /* Notify clients about changed restart counter */
2540 unit_add_to_dbus_queue(UNIT(s
));
2544 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2545 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2548 static void service_enter_reload_by_notify(Service
*s
) {
2549 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2554 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2555 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
2557 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2558 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2560 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2563 static void service_enter_reload(Service
*s
) {
2564 bool killed
= false;
2569 service_unwatch_control_pid(s
);
2570 s
->reload_result
= SERVICE_SUCCESS
;
2572 usec_t ts
= now(CLOCK_MONOTONIC
);
2574 if (s
->type
== SERVICE_NOTIFY_RELOAD
&& s
->main_pid
> 0) {
2575 r
= kill_and_sigcont(s
->main_pid
, s
->reload_signal
);
2577 log_unit_warning_errno(UNIT(s
), r
, "Failed to send reload signal: %m");
2584 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2585 if (s
->control_command
) {
2586 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2588 r
= service_spawn(s
,
2590 s
->timeout_start_usec
,
2591 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2594 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2598 service_set_state(s
, SERVICE_RELOAD
);
2599 } else if (killed
) {
2600 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2601 service_set_state(s
, SERVICE_RELOAD_SIGNAL
);
2603 service_enter_running(s
, SERVICE_SUCCESS
);
2607 /* Store the timestamp when we started reloading: when reloading via SIGHUP we won't leave the reload
2608 * state until we received both RELOADING=1 and READY=1 with MONOTONIC_USEC= set to a value above
2609 * this. Thus we know for sure the reload cycle was executed *after* we requested it, and is not one
2610 * that was already in progress before. */
2611 s
->reload_begin_usec
= ts
;
2615 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2616 service_enter_running(s
, SERVICE_SUCCESS
);
2619 static void service_run_next_control(Service
*s
) {
2624 assert(s
->control_command
);
2625 assert(s
->control_command
->command_next
);
2627 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2629 s
->control_command
= s
->control_command
->command_next
;
2630 service_unwatch_control_pid(s
);
2632 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2633 timeout
= s
->timeout_start_usec
;
2635 timeout
= s
->timeout_stop_usec
;
2637 r
= service_spawn(s
,
2640 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2641 (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
) ? EXEC_WRITE_CREDENTIALS
: 0)|
2642 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2643 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2644 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_START
) ? EXEC_SETENV_MONITOR_RESULT
: 0)|
2645 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2653 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2655 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2656 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2657 else if (s
->state
== SERVICE_STOP_POST
)
2658 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2659 else if (s
->state
== SERVICE_RELOAD
) {
2660 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2661 service_enter_running(s
, SERVICE_SUCCESS
);
2663 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2666 static void service_run_next_main(Service
*s
) {
2671 assert(s
->main_command
);
2672 assert(s
->main_command
->command_next
);
2673 assert(s
->type
== SERVICE_ONESHOT
);
2675 s
->main_command
= s
->main_command
->command_next
;
2676 service_unwatch_main_pid(s
);
2678 r
= service_spawn(s
,
2680 s
->timeout_start_usec
,
2681 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2686 (void) service_set_main_pid(s
, pid
);
2691 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2692 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2695 static int service_start(Unit
*u
) {
2696 Service
*s
= SERVICE(u
);
2701 /* We cannot fulfill this request right now, try again later
2703 if (IN_SET(s
->state
,
2704 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2705 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2708 /* Already on it! */
2709 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2712 /* A service that will be restarted must be stopped first to trigger BindsTo and/or OnFailure
2713 * dependencies. If a user does not want to wait for the holdoff time to elapse, the service should
2714 * be manually restarted, not started. We simply return EAGAIN here, so that any start jobs stay
2715 * queued, and assume that the auto restart timer will eventually trigger the restart. */
2716 if (IN_SET(s
->state
, SERVICE_AUTO_RESTART
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
))
2719 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
, SERVICE_AUTO_RESTART_QUEUED
));
2721 r
= unit_acquire_invocation_id(u
);
2725 s
->result
= SERVICE_SUCCESS
;
2726 s
->reload_result
= SERVICE_SUCCESS
;
2727 s
->main_pid_known
= false;
2728 s
->main_pid_alien
= false;
2729 s
->forbid_restart
= false;
2731 s
->status_text
= mfree(s
->status_text
);
2732 s
->status_errno
= 0;
2734 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2735 s
->notify_state
= NOTIFY_UNKNOWN
;
2737 s
->watchdog_original_usec
= s
->watchdog_usec
;
2738 s
->watchdog_override_enable
= false;
2739 s
->watchdog_override_usec
= USEC_INFINITY
;
2741 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2742 exec_status_reset(&s
->main_exec_status
);
2744 /* This is not an automatic restart? Flush the restart counter then */
2745 if (s
->flush_n_restarts
) {
2747 s
->flush_n_restarts
= false;
2750 u
->reset_accounting
= true;
2752 service_enter_condition(s
);
2756 static int service_stop(Unit
*u
) {
2757 Service
*s
= SERVICE(u
);
2761 /* Don't create restart jobs from manual stops. */
2762 s
->forbid_restart
= true;
2767 case SERVICE_STOP_SIGTERM
:
2768 case SERVICE_STOP_SIGKILL
:
2769 case SERVICE_STOP_POST
:
2770 case SERVICE_FINAL_WATCHDOG
:
2771 case SERVICE_FINAL_SIGTERM
:
2772 case SERVICE_FINAL_SIGKILL
:
2776 case SERVICE_AUTO_RESTART
:
2777 case SERVICE_AUTO_RESTART_QUEUED
:
2778 /* Give up on the auto restart */
2779 service_set_state(s
, service_determine_dead_state(s
));
2782 case SERVICE_CONDITION
:
2783 case SERVICE_START_PRE
:
2785 case SERVICE_START_POST
:
2786 case SERVICE_RELOAD
:
2787 case SERVICE_RELOAD_SIGNAL
:
2788 case SERVICE_RELOAD_NOTIFY
:
2789 case SERVICE_STOP_WATCHDOG
:
2790 /* If there's already something running we go directly into kill mode. */
2791 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2794 case SERVICE_CLEANING
:
2795 /* If we are currently cleaning, then abort it, brutally. */
2796 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2799 case SERVICE_RUNNING
:
2800 case SERVICE_EXITED
:
2801 service_enter_stop(s
, SERVICE_SUCCESS
);
2804 case SERVICE_DEAD_BEFORE_AUTO_RESTART
:
2805 case SERVICE_FAILED_BEFORE_AUTO_RESTART
:
2807 case SERVICE_FAILED
:
2808 case SERVICE_DEAD_RESOURCES_PINNED
:
2810 /* Unknown state, or unit_stop() should already have handled these */
2811 assert_not_reached();
2815 static int service_reload(Unit
*u
) {
2816 Service
*s
= SERVICE(u
);
2820 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2822 service_enter_reload(s
);
2826 _pure_
static bool service_can_reload(Unit
*u
) {
2827 Service
*s
= SERVICE(u
);
2831 return s
->exec_command
[SERVICE_EXEC_RELOAD
] ||
2832 s
->type
== SERVICE_NOTIFY_RELOAD
;
2835 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, const ExecCommand
*current
) {
2836 Service
*s
= SERVICE(u
);
2841 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2843 const ExecCommand
*first
= s
->exec_command
[id
];
2845 /* Figure out where we are in the list by walking back to the beginning */
2846 for (const ExecCommand
*c
= current
; c
!= first
; c
= c
->command_prev
)
2852 static int service_serialize_exec_command(Unit
*u
, FILE *f
, const ExecCommand
*command
) {
2853 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2854 Service
*s
= SERVICE(u
);
2855 const char *type
, *key
;
2856 ServiceExecCommand id
;
2866 if (command
== s
->control_command
) {
2868 id
= s
->control_command_id
;
2871 id
= SERVICE_EXEC_START
;
2874 idx
= service_exec_command_index(u
, id
, command
);
2876 STRV_FOREACH(arg
, command
->argv
) {
2877 _cleanup_free_
char *e
= NULL
;
2885 if (!GREEDY_REALLOC(args
, length
+ 2 + n
+ 2))
2889 args
[length
++] = ' ';
2891 args
[length
++] = '"';
2892 memcpy(args
+ length
, e
, n
);
2894 args
[length
++] = '"';
2897 if (!GREEDY_REALLOC(args
, length
+ 1))
2902 p
= cescape(command
->path
);
2906 key
= strjoina(type
, "-command");
2908 /* We use '+1234' instead of '1234' to mark the last command in a sequence.
2909 * This is used in service_deserialize_exec_command(). */
2910 (void) serialize_item_format(
2913 service_exec_command_to_string(id
),
2914 command
->command_next
? "" : "+",
2921 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2922 Service
*s
= SERVICE(u
);
2929 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2930 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2931 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2933 if (s
->control_pid
> 0)
2934 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2936 if (s
->main_pid_known
&& s
->main_pid
> 0)
2937 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2939 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2940 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2941 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2943 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2944 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2946 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2950 service_serialize_exec_command(u
, f
, s
->control_command
);
2951 service_serialize_exec_command(u
, f
, s
->main_command
);
2953 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2956 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2959 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2963 if (s
->exec_fd_event_source
) {
2964 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2968 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2971 if (UNIT_ISSET(s
->accept_socket
)) {
2972 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2977 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2981 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2982 _cleanup_free_
char *c
= NULL
;
2985 copy
= fdset_put_dup(fds
, fs
->fd
);
2987 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2989 c
= cescape(fs
->fdname
);
2993 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2996 if (s
->main_exec_status
.pid
> 0) {
2997 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2998 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2999 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
3001 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
3002 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
3003 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
3007 if (s
->notify_access_override
>= 0)
3008 (void) serialize_item(f
, "notify-access-override", notify_access_to_string(s
->notify_access_override
));
3010 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
3011 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
3013 if (s
->watchdog_override_enable
)
3014 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
3016 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
3017 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
3019 if (s
->reload_begin_usec
!= USEC_INFINITY
)
3020 (void) serialize_item_format(f
, "reload-begin-usec", USEC_FMT
, s
->reload_begin_usec
);
3025 int service_deserialize_exec_command(
3028 const char *value
) {
3030 Service
*s
= SERVICE(u
);
3032 unsigned idx
= 0, i
;
3033 bool control
, found
= false, last
= false;
3034 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
3035 ExecCommand
*command
= NULL
;
3036 _cleanup_free_
char *path
= NULL
;
3037 _cleanup_strv_free_
char **argv
= NULL
;
3039 enum ExecCommandState
{
3040 STATE_EXEC_COMMAND_TYPE
,
3041 STATE_EXEC_COMMAND_INDEX
,
3042 STATE_EXEC_COMMAND_PATH
,
3043 STATE_EXEC_COMMAND_ARGS
,
3044 _STATE_EXEC_COMMAND_MAX
,
3045 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
3052 control
= streq(key
, "control-command");
3054 state
= STATE_EXEC_COMMAND_TYPE
;
3057 _cleanup_free_
char *arg
= NULL
;
3059 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3066 case STATE_EXEC_COMMAND_TYPE
:
3067 id
= service_exec_command_from_string(arg
);
3071 state
= STATE_EXEC_COMMAND_INDEX
;
3073 case STATE_EXEC_COMMAND_INDEX
:
3074 /* PID 1234 is serialized as either '1234' or '+1234'. The second form is used to
3075 * mark the last command in a sequence. We warn if the deserialized command doesn't
3076 * match what we have loaded from the unit, but we don't need to warn if that is the
3079 r
= safe_atou(arg
, &idx
);
3082 last
= arg
[0] == '+';
3084 state
= STATE_EXEC_COMMAND_PATH
;
3086 case STATE_EXEC_COMMAND_PATH
:
3087 path
= TAKE_PTR(arg
);
3088 state
= STATE_EXEC_COMMAND_ARGS
;
3090 case STATE_EXEC_COMMAND_ARGS
:
3091 r
= strv_extend(&argv
, arg
);
3096 assert_not_reached();
3100 if (state
!= STATE_EXEC_COMMAND_ARGS
)
3102 if (strv_isempty(argv
))
3103 return -EINVAL
; /* At least argv[0] must be always present. */
3105 /* Let's check whether exec command on given offset matches data that we just deserialized */
3106 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
3110 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
3115 /* Command at the index we serialized is different, let's look for command that exactly
3116 * matches but is on different index. If there is no such command we will not resume execution. */
3117 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
3118 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
3122 if (command
&& control
) {
3123 s
->control_command
= command
;
3124 s
->control_command_id
= id
;
3126 s
->main_command
= command
;
3128 log_unit_debug(u
, "Current command vanished from the unit file.");
3130 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
3135 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
3136 Service
*s
= SERVICE(u
);
3144 if (streq(key
, "state")) {
3147 state
= service_state_from_string(value
);
3149 log_unit_debug(u
, "Failed to parse state value: %s", value
);
3151 s
->deserialized_state
= state
;
3152 } else if (streq(key
, "result")) {
3155 f
= service_result_from_string(value
);
3157 log_unit_debug(u
, "Failed to parse result value: %s", value
);
3158 else if (f
!= SERVICE_SUCCESS
)
3161 } else if (streq(key
, "reload-result")) {
3164 f
= service_result_from_string(value
);
3166 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
3167 else if (f
!= SERVICE_SUCCESS
)
3168 s
->reload_result
= f
;
3170 } else if (streq(key
, "control-pid")) {
3173 if (parse_pid(value
, &pid
) < 0)
3174 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
3176 s
->control_pid
= pid
;
3177 } else if (streq(key
, "main-pid")) {
3180 if (parse_pid(value
, &pid
) < 0)
3181 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
3183 (void) service_set_main_pid(s
, pid
);
3184 } else if (streq(key
, "main-pid-known")) {
3187 b
= parse_boolean(value
);
3189 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
3191 s
->main_pid_known
= b
;
3192 } else if (streq(key
, "bus-name-good")) {
3195 b
= parse_boolean(value
);
3197 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
3199 s
->bus_name_good
= b
;
3200 } else if (streq(key
, "bus-name-owner")) {
3201 r
= free_and_strdup(&s
->bus_name_owner
, value
);
3203 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
3204 } else if (streq(key
, "status-text")) {
3208 l
= cunescape(value
, 0, &t
);
3210 log_unit_debug_errno(u
, l
, "Failed to unescape status text '%s': %m", value
);
3212 free_and_replace(s
->status_text
, t
);
3214 } else if (streq(key
, "accept-socket")) {
3217 if (u
->type
!= UNIT_SOCKET
) {
3218 log_unit_debug(u
, "Failed to deserialize accept-socket: unit is not a socket");
3222 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
3224 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
3226 unit_ref_set(&s
->accept_socket
, u
, socket
);
3227 SOCKET(socket
)->n_connections
++;
3230 } else if (streq(key
, "socket-fd")) {
3233 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3234 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
3236 asynchronous_close(s
->socket_fd
);
3237 s
->socket_fd
= fdset_remove(fds
, fd
);
3239 } else if (streq(key
, "fd-store-fd")) {
3240 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
3243 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
3244 if (r
<= 0 || (fd
= parse_fd(fdv
)) < 0 || !fdset_contains(fds
, fd
)) {
3245 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3249 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3251 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3255 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
3257 /* If the value is not present, we assume the default */
3259 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
3260 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
3264 r
= fdset_remove(fds
, fd
);
3266 log_unit_error_errno(u
, r
, "Could not find deserialized fd %i in fdset: %m", fd
);
3271 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
3273 log_unit_error_errno(u
, r
, "Failed to store deserialized fd %i: %m", fd
);
3276 } else if (streq(key
, "main-exec-status-pid")) {
3279 if (parse_pid(value
, &pid
) < 0)
3280 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
3282 s
->main_exec_status
.pid
= pid
;
3283 } else if (streq(key
, "main-exec-status-code")) {
3286 if (safe_atoi(value
, &i
) < 0)
3287 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
3289 s
->main_exec_status
.code
= i
;
3290 } else if (streq(key
, "main-exec-status-status")) {
3293 if (safe_atoi(value
, &i
) < 0)
3294 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3296 s
->main_exec_status
.status
= i
;
3297 } else if (streq(key
, "main-exec-status-start"))
3298 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3299 else if (streq(key
, "main-exec-status-exit"))
3300 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3301 else if (streq(key
, "notify-access-override")) {
3302 NotifyAccess notify_access
;
3304 notify_access
= notify_access_from_string(value
);
3305 if (notify_access
< 0)
3306 log_unit_debug(u
, "Failed to parse notify-access-override value: %s", value
);
3308 s
->notify_access_override
= notify_access
;
3309 } else if (streq(key
, "watchdog-timestamp"))
3310 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3311 else if (streq(key
, "forbid-restart")) {
3314 b
= parse_boolean(value
);
3316 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3318 s
->forbid_restart
= b
;
3319 } else if (streq(key
, "stdin-fd")) {
3322 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3323 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3325 asynchronous_close(s
->stdin_fd
);
3326 s
->stdin_fd
= fdset_remove(fds
, fd
);
3327 s
->exec_context
.stdio_as_fds
= true;
3329 } else if (streq(key
, "stdout-fd")) {
3332 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3333 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3335 asynchronous_close(s
->stdout_fd
);
3336 s
->stdout_fd
= fdset_remove(fds
, fd
);
3337 s
->exec_context
.stdio_as_fds
= true;
3339 } else if (streq(key
, "stderr-fd")) {
3342 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3343 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3345 asynchronous_close(s
->stderr_fd
);
3346 s
->stderr_fd
= fdset_remove(fds
, fd
);
3347 s
->exec_context
.stdio_as_fds
= true;
3349 } else if (streq(key
, "exec-fd")) {
3352 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3353 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3355 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3357 fd
= fdset_remove(fds
, fd
);
3358 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3361 } else if (streq(key
, "watchdog-override-usec")) {
3362 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3363 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3365 s
->watchdog_override_enable
= true;
3367 } else if (streq(key
, "watchdog-original-usec")) {
3368 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3369 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3371 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3372 r
= service_deserialize_exec_command(u
, key
, value
);
3374 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3376 } else if (streq(key
, "n-restarts")) {
3377 r
= safe_atou(value
, &s
->n_restarts
);
3379 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3381 } else if (streq(key
, "flush-n-restarts")) {
3382 r
= parse_boolean(value
);
3384 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3386 s
->flush_n_restarts
= r
;
3387 } else if (streq(key
, "reload-begin-usec")) {
3388 r
= deserialize_usec(value
, &s
->reload_begin_usec
);
3390 log_unit_debug_errno(u
, r
, "Failed to parse serialized reload begin timestamp '%s', ignoring: %m", value
);
3392 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3397 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3398 const UnitActiveState
*table
;
3402 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3404 return table
[SERVICE(u
)->state
];
3407 static const char *service_sub_state_to_string(Unit
*u
) {
3410 return service_state_to_string(SERVICE(u
)->state
);
3413 static bool service_may_gc(Unit
*u
) {
3414 Service
*s
= SERVICE(u
);
3418 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3419 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3420 * have moved outside of the cgroup. */
3422 if (main_pid_good(s
) > 0 ||
3423 control_pid_good(s
) > 0)
3426 /* Only allow collection of actually dead services, i.e. not those that are in the transitionary
3427 * SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART states. */
3428 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
3434 static int service_retry_pid_file(Service
*s
) {
3437 assert(s
->pid_file
);
3438 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3440 r
= service_load_pid_file(s
, false);
3444 service_unwatch_pid_file(s
);
3446 service_enter_running(s
, SERVICE_SUCCESS
);
3450 static int service_watch_pid_file(Service
*s
) {
3453 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3455 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3459 /* the pidfile might have appeared just before we set the watch */
3460 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3461 service_retry_pid_file(s
);
3465 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3466 service_unwatch_pid_file(s
);
3470 static int service_demand_pid_file(Service
*s
) {
3471 _cleanup_free_ PathSpec
*ps
= NULL
;
3473 assert(s
->pid_file
);
3474 assert(!s
->pid_file_pathspec
);
3476 ps
= new(PathSpec
, 1);
3482 .path
= strdup(s
->pid_file
),
3483 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that keep their PID file
3484 * open all the time. */
3485 .type
= PATH_MODIFIED
,
3486 .inotify_fd
= -EBADF
,
3492 path_simplify(ps
->path
);
3494 s
->pid_file_pathspec
= TAKE_PTR(ps
);
3496 return service_watch_pid_file(s
);
3499 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3500 PathSpec
*p
= ASSERT_PTR(userdata
);
3503 s
= SERVICE(p
->unit
);
3507 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3508 assert(s
->pid_file_pathspec
);
3509 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3511 log_unit_debug(UNIT(s
), "inotify event");
3513 if (path_spec_fd_event(p
, events
) < 0)
3516 if (service_retry_pid_file(s
) == 0)
3519 if (service_watch_pid_file(s
) < 0)
3525 service_unwatch_pid_file(s
);
3526 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3530 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3531 Service
*s
= SERVICE(userdata
);
3535 log_unit_debug(UNIT(s
), "got exec-fd event");
3537 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3538 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3539 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3540 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3541 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3542 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3543 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3544 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3550 n
= read(fd
, &x
, sizeof(x
));
3552 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3555 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3557 if (n
== 0) { /* EOF → the event we are waiting for */
3559 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3561 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3562 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3564 s
->exec_fd_hot
= false;
3566 /* Nice! This is what we have been waiting for. Transition to next state. */
3567 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3568 service_enter_start_post(s
);
3570 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3575 /* A byte was read → this turns on/off the exec fd logic */
3576 assert(n
== sizeof(x
));
3583 static void service_notify_cgroup_empty_event(Unit
*u
) {
3584 Service
*s
= SERVICE(u
);
3588 log_unit_debug(u
, "Control group is empty.");
3592 /* Waiting for SIGCHLD is usually more interesting, because it includes return
3593 * codes/signals. Which is why we ignore the cgroup events for most cases, except when we
3594 * don't know pid which to expect the SIGCHLD for. */
3597 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
3598 main_pid_good(s
) == 0 &&
3599 control_pid_good(s
) == 0) {
3600 /* No chance of getting a ready notification anymore */
3601 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3605 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& main_pid_good(s
) <= 0)
3606 service_enter_start_post(s
);
3609 case SERVICE_START_POST
:
3610 if (s
->pid_file_pathspec
&&
3611 main_pid_good(s
) == 0 &&
3612 control_pid_good(s
) == 0) {
3614 /* Give up hoping for the daemon to write its PID file */
3615 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3617 service_unwatch_pid_file(s
);
3618 if (s
->state
== SERVICE_START
)
3619 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3621 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3625 case SERVICE_RUNNING
:
3626 /* service_enter_running() will figure out what to do */
3627 service_enter_running(s
, SERVICE_SUCCESS
);
3630 case SERVICE_STOP_WATCHDOG
:
3631 case SERVICE_STOP_SIGTERM
:
3632 case SERVICE_STOP_SIGKILL
:
3634 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3635 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3639 case SERVICE_STOP_POST
:
3640 case SERVICE_FINAL_WATCHDOG
:
3641 case SERVICE_FINAL_SIGTERM
:
3642 case SERVICE_FINAL_SIGKILL
:
3643 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3644 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3648 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3649 * up the cgroup earlier and should do it now. */
3650 case SERVICE_AUTO_RESTART
:
3651 case SERVICE_AUTO_RESTART_QUEUED
:
3652 unit_prune_cgroup(u
);
3660 static void service_notify_cgroup_oom_event(Unit
*u
, bool managed_oom
) {
3661 Service
*s
= SERVICE(u
);
3664 log_unit_debug(u
, "Process(es) of control group were killed by systemd-oomd.");
3666 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3668 if (s
->oom_policy
== OOM_CONTINUE
)
3673 case SERVICE_CONDITION
:
3674 case SERVICE_START_PRE
:
3676 case SERVICE_START_POST
:
3678 if (s
->oom_policy
== OOM_STOP
)
3679 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3680 else if (s
->oom_policy
== OOM_KILL
)
3681 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3685 case SERVICE_EXITED
:
3686 case SERVICE_RUNNING
:
3687 if (s
->oom_policy
== OOM_STOP
)
3688 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3689 else if (s
->oom_policy
== OOM_KILL
)
3690 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3694 case SERVICE_STOP_WATCHDOG
:
3695 case SERVICE_STOP_SIGTERM
:
3696 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3699 case SERVICE_STOP_SIGKILL
:
3700 case SERVICE_FINAL_SIGKILL
:
3701 if (s
->result
== SERVICE_SUCCESS
)
3702 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3705 case SERVICE_STOP_POST
:
3706 case SERVICE_FINAL_SIGTERM
:
3707 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3715 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3716 bool notify_dbus
= true;
3717 Service
*s
= SERVICE(u
);
3719 ExitClean clean_mode
;
3724 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3725 * considered daemons as they are typically not long running. */
3726 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3727 clean_mode
= EXIT_CLEAN_COMMAND
;
3729 clean_mode
= EXIT_CLEAN_DAEMON
;
3731 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3732 f
= SERVICE_SUCCESS
;
3733 else if (code
== CLD_EXITED
)
3734 f
= SERVICE_FAILURE_EXIT_CODE
;
3735 else if (code
== CLD_KILLED
)
3736 f
= SERVICE_FAILURE_SIGNAL
;
3737 else if (code
== CLD_DUMPED
)
3738 f
= SERVICE_FAILURE_CORE_DUMP
;
3740 assert_not_reached();
3742 if (s
->main_pid
== pid
) {
3743 /* Clean up the exec_fd event source. We want to do this here, not later in
3744 * service_set_state(), because service_enter_stop_post() calls service_spawn().
3745 * The source owns its end of the pipe, so this will close that too. */
3746 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3748 /* Forking services may occasionally move to a new PID.
3749 * As long as they update the PID file before exiting the old
3750 * PID, they're fine. */
3751 if (service_load_pid_file(s
, false) > 0)
3755 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3757 if (s
->main_command
) {
3758 /* If this is not a forking service than the
3759 * main process got started and hence we copy
3760 * the exit status so that it is recorded both
3761 * as main and as control process exit
3764 s
->main_command
->exec_status
= s
->main_exec_status
;
3766 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3767 f
= SERVICE_SUCCESS
;
3768 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3770 /* If this is a forked process, then we should
3771 * ignore the return value if this was
3772 * configured for the starter process */
3774 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3775 f
= SERVICE_SUCCESS
;
3778 unit_log_process_exit(
3781 service_exec_command_to_string(SERVICE_EXEC_START
),
3782 f
== SERVICE_SUCCESS
,
3785 if (s
->result
== SERVICE_SUCCESS
)
3788 if (s
->main_command
&&
3789 s
->main_command
->command_next
&&
3790 s
->type
== SERVICE_ONESHOT
&&
3791 f
== SERVICE_SUCCESS
) {
3793 /* There is another command to execute, so let's do that. */
3795 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3796 service_run_next_main(s
);
3799 s
->main_command
= NULL
;
3801 /* Services with ExitType=cgroup do not act on main PID exiting, unless the cgroup is
3803 if (s
->exit_type
== SERVICE_EXIT_MAIN
|| cgroup_good(s
) <= 0) {
3804 /* The service exited, so the service is officially gone. */
3807 case SERVICE_START_POST
:
3808 case SERVICE_RELOAD
:
3809 case SERVICE_RELOAD_SIGNAL
:
3810 case SERVICE_RELOAD_NOTIFY
:
3811 /* If neither main nor control processes are running then the current
3812 * state can never exit cleanly, hence immediately terminate the
3814 if (control_pid_good(s
) <= 0)
3815 service_enter_stop(s
, f
);
3817 /* Otherwise need to wait until the operation is done. */
3821 /* Need to wait until the operation is done. */
3825 if (s
->type
== SERVICE_ONESHOT
) {
3826 /* This was our main goal, so let's go on */
3827 if (f
== SERVICE_SUCCESS
)
3828 service_enter_start_post(s
);
3830 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3832 } else if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
)) {
3833 /* Only enter running through a notification, so that the
3834 * SERVICE_START state signifies that no ready notification
3835 * has been received */
3836 if (f
!= SERVICE_SUCCESS
)
3837 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3838 else if (!s
->remain_after_exit
|| service_get_notify_access(s
) == NOTIFY_MAIN
)
3839 /* The service has never been and will never be active */
3840 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3845 case SERVICE_RUNNING
:
3846 service_enter_running(s
, f
);
3849 case SERVICE_STOP_WATCHDOG
:
3850 case SERVICE_STOP_SIGTERM
:
3851 case SERVICE_STOP_SIGKILL
:
3853 if (control_pid_good(s
) <= 0)
3854 service_enter_stop_post(s
, f
);
3856 /* If there is still a control process, wait for that first */
3859 case SERVICE_STOP_POST
:
3861 if (control_pid_good(s
) <= 0)
3862 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3866 case SERVICE_FINAL_WATCHDOG
:
3867 case SERVICE_FINAL_SIGTERM
:
3868 case SERVICE_FINAL_SIGKILL
:
3870 if (control_pid_good(s
) <= 0)
3871 service_enter_dead(s
, f
, true);
3875 assert_not_reached();
3880 } else if (s
->control_pid
== pid
) {
3886 if (s
->control_command
) {
3887 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3889 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3890 f
= SERVICE_SUCCESS
;
3893 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3894 if (s
->state
== SERVICE_CONDITION
) {
3895 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3896 UNIT(s
)->condition_result
= false;
3897 f
= SERVICE_SKIP_CONDITION
;
3899 } else if (f
== SERVICE_SUCCESS
) {
3900 UNIT(s
)->condition_result
= true;
3905 kind
= "Condition check process";
3907 kind
= "Control process";
3908 success
= f
== SERVICE_SUCCESS
;
3911 unit_log_process_exit(
3914 service_exec_command_to_string(s
->control_command_id
),
3918 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3921 if (s
->control_command
&&
3922 s
->control_command
->command_next
&&
3923 f
== SERVICE_SUCCESS
) {
3925 /* There is another command to * execute, so let's do that. */
3927 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3928 service_run_next_control(s
);
3931 /* No further commands for this step, so let's figure out what to do next */
3933 s
->control_command
= NULL
;
3934 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3936 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3940 case SERVICE_CONDITION
:
3941 if (f
== SERVICE_SUCCESS
)
3942 service_enter_start_pre(s
);
3944 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3947 case SERVICE_START_PRE
:
3948 if (f
== SERVICE_SUCCESS
)
3949 service_enter_start(s
);
3951 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3955 if (s
->type
!= SERVICE_FORKING
)
3956 /* Maybe spurious event due to a reload that changed the type? */
3959 if (f
!= SERVICE_SUCCESS
) {
3960 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3965 bool has_start_post
;
3968 /* Let's try to load the pid file here if we can.
3969 * The PID file might actually be created by a START_POST
3970 * script. In that case don't worry if the loading fails. */
3972 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3973 r
= service_load_pid_file(s
, !has_start_post
);
3974 if (!has_start_post
&& r
< 0) {
3975 r
= service_demand_pid_file(s
);
3976 if (r
< 0 || cgroup_good(s
) == 0)
3977 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3981 service_search_main_pid(s
);
3983 service_enter_start_post(s
);
3986 case SERVICE_START_POST
:
3987 if (f
!= SERVICE_SUCCESS
) {
3988 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3995 r
= service_load_pid_file(s
, true);
3997 r
= service_demand_pid_file(s
);
3998 if (r
< 0 || cgroup_good(s
) == 0)
3999 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
4003 service_search_main_pid(s
);
4005 service_enter_running(s
, SERVICE_SUCCESS
);
4008 case SERVICE_RELOAD
:
4009 case SERVICE_RELOAD_SIGNAL
:
4010 case SERVICE_RELOAD_NOTIFY
:
4011 if (f
== SERVICE_SUCCESS
)
4012 if (service_load_pid_file(s
, true) < 0)
4013 service_search_main_pid(s
);
4015 s
->reload_result
= f
;
4017 /* If the last notification we received from the service process indicates
4018 * we are still reloading, then don't leave reloading state just yet, just
4019 * transition into SERVICE_RELOAD_NOTIFY, to wait for the READY=1 coming,
4021 if (s
->notify_state
== NOTIFY_RELOADING
)
4022 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4024 service_enter_running(s
, SERVICE_SUCCESS
);
4028 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
4031 case SERVICE_STOP_WATCHDOG
:
4032 case SERVICE_STOP_SIGTERM
:
4033 case SERVICE_STOP_SIGKILL
:
4034 if (main_pid_good(s
) <= 0)
4035 service_enter_stop_post(s
, f
);
4037 /* If there is still a service process around, wait until
4038 * that one quit, too */
4041 case SERVICE_STOP_POST
:
4042 if (main_pid_good(s
) <= 0)
4043 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
4046 case SERVICE_FINAL_WATCHDOG
:
4047 case SERVICE_FINAL_SIGTERM
:
4048 case SERVICE_FINAL_SIGKILL
:
4049 if (main_pid_good(s
) <= 0)
4050 service_enter_dead(s
, f
, true);
4053 case SERVICE_CLEANING
:
4055 if (s
->clean_result
== SERVICE_SUCCESS
)
4056 s
->clean_result
= f
;
4058 service_enter_dead(s
, SERVICE_SUCCESS
, false);
4062 assert_not_reached();
4065 } else /* Neither control nor main PID? If so, don't notify about anything */
4066 notify_dbus
= false;
4068 /* Notify clients about changed exit status */
4070 unit_add_to_dbus_queue(u
);
4072 /* We watch the main/control process otherwise we can't retrieve the unit they
4073 * belong to with cgroupv1. But if they are not our direct child, we won't get a
4074 * SIGCHLD for them. Therefore we need to look for others to watch so we can
4075 * detect when the cgroup becomes empty. Note that the control process is always
4076 * our child so it's pointless to watch all other processes. */
4077 if (!control_pid_good(s
))
4078 if (!s
->main_pid_known
|| s
->main_pid_alien
)
4079 (void) unit_enqueue_rewatch_pids(u
);
4082 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4083 Service
*s
= SERVICE(userdata
);
4086 assert(source
== s
->timer_event_source
);
4090 case SERVICE_CONDITION
:
4091 case SERVICE_START_PRE
:
4093 case SERVICE_START_POST
:
4094 switch (s
->timeout_start_failure_mode
) {
4096 case SERVICE_TIMEOUT_TERMINATE
:
4097 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
4098 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4101 case SERVICE_TIMEOUT_ABORT
:
4102 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
4103 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4106 case SERVICE_TIMEOUT_KILL
:
4107 if (s
->kill_context
.send_sigkill
) {
4108 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
4109 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4111 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
4112 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4117 assert_not_reached();
4121 case SERVICE_RUNNING
:
4122 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
4123 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
4126 case SERVICE_RELOAD
:
4127 case SERVICE_RELOAD_SIGNAL
:
4128 case SERVICE_RELOAD_NOTIFY
:
4129 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
4130 service_kill_control_process(s
);
4131 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
4132 service_enter_running(s
, SERVICE_SUCCESS
);
4136 switch (s
->timeout_stop_failure_mode
) {
4138 case SERVICE_TIMEOUT_TERMINATE
:
4139 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
4140 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4143 case SERVICE_TIMEOUT_ABORT
:
4144 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
4145 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4148 case SERVICE_TIMEOUT_KILL
:
4149 if (s
->kill_context
.send_sigkill
) {
4150 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
4151 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4153 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
4154 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4159 assert_not_reached();
4163 case SERVICE_STOP_WATCHDOG
:
4164 if (s
->kill_context
.send_sigkill
) {
4165 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
4166 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4168 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
4169 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4173 case SERVICE_STOP_SIGTERM
:
4174 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4175 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
4176 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4177 } else if (s
->kill_context
.send_sigkill
) {
4178 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
4179 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4181 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
4182 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4187 case SERVICE_STOP_SIGKILL
:
4188 /* Uh, we sent a SIGKILL and it is still not gone?
4189 * Must be something we cannot kill, so let's just be
4190 * weirded out and continue */
4192 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
4193 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4196 case SERVICE_STOP_POST
:
4197 switch (s
->timeout_stop_failure_mode
) {
4199 case SERVICE_TIMEOUT_TERMINATE
:
4200 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
4201 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4204 case SERVICE_TIMEOUT_ABORT
:
4205 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
4206 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4209 case SERVICE_TIMEOUT_KILL
:
4210 if (s
->kill_context
.send_sigkill
) {
4211 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
4212 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4214 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
4215 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4220 assert_not_reached();
4224 case SERVICE_FINAL_WATCHDOG
:
4225 if (s
->kill_context
.send_sigkill
) {
4226 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
4227 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4229 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
4230 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4234 case SERVICE_FINAL_SIGTERM
:
4235 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4236 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
4237 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4238 } else if (s
->kill_context
.send_sigkill
) {
4239 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
4240 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4242 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
4243 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4248 case SERVICE_FINAL_SIGKILL
:
4249 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
4250 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
4253 case SERVICE_AUTO_RESTART
:
4254 if (s
->restart_usec
> 0)
4255 log_unit_debug(UNIT(s
),
4256 "Service restart interval %s expired, scheduling restart.",
4257 FORMAT_TIMESPAN(service_restart_usec_next(s
), USEC_PER_SEC
));
4259 log_unit_debug(UNIT(s
),
4260 "Service has no hold-off time (RestartSec=0), scheduling restart.");
4262 service_enter_restart(s
);
4265 case SERVICE_CLEANING
:
4266 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
4268 if (s
->clean_result
== SERVICE_SUCCESS
)
4269 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
4271 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
4275 assert_not_reached();
4281 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4282 Service
*s
= SERVICE(userdata
);
4283 usec_t watchdog_usec
;
4286 assert(source
== s
->watchdog_event_source
);
4288 watchdog_usec
= service_get_watchdog_usec(s
);
4290 if (UNIT(s
)->manager
->service_watchdogs
) {
4291 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
4292 FORMAT_TIMESPAN(watchdog_usec
, 1));
4294 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4296 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
4297 FORMAT_TIMESPAN(watchdog_usec
, 1));
4302 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
4305 NotifyAccess notify_access
= service_get_notify_access(s
);
4307 if (notify_access
== NOTIFY_NONE
) {
4308 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
4312 if (notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
4313 if (s
->main_pid
!= 0)
4314 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
);
4316 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
);
4321 if (notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
4322 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
4323 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
,
4324 pid
, s
->main_pid
, s
->control_pid
);
4325 else if (s
->main_pid
!= 0)
4326 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
);
4327 else if (s
->control_pid
!= 0)
4328 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
);
4330 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
);
4338 static void service_force_watchdog(Service
*s
) {
4339 if (!UNIT(s
)->manager
->service_watchdogs
)
4342 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
4343 s
->status_text
?: "<unset>");
4345 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4348 static void service_notify_message(
4350 const struct ucred
*ucred
,
4354 Service
*s
= SERVICE(u
);
4355 bool notify_dbus
= false;
4356 usec_t monotonic_usec
= USEC_INFINITY
;
4363 if (!service_notify_message_authorized(s
, ucred
->pid
, fds
))
4366 if (DEBUG_LOGGING
) {
4367 _cleanup_free_
char *cc
= NULL
;
4369 cc
= strv_join(tags
, ", ");
4370 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4373 /* Interpret MAINPID= */
4374 e
= strv_find_startswith(tags
, "MAINPID=");
4375 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
)) {
4378 if (parse_pid(e
, &new_main_pid
) < 0)
4379 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4380 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4382 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4384 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4386 if (ucred
->uid
== 0) {
4387 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
);
4390 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4393 (void) service_set_main_pid(s
, new_main_pid
);
4395 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4397 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4404 /* Parse MONOTONIC_USEC= */
4405 e
= strv_find_startswith(tags
, "MONOTONIC_USEC=");
4407 r
= safe_atou64(e
, &monotonic_usec
);
4409 log_unit_warning_errno(u
, r
, "Failed to parse MONOTONIC_USEC= field in notification message, ignoring: %s", e
);
4412 /* Interpret READY=/STOPPING=/RELOADING=. STOPPING= wins over the others, and READY= over RELOADING= */
4413 if (strv_contains(tags
, "STOPPING=1")) {
4414 s
->notify_state
= NOTIFY_STOPPING
;
4416 if (IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
4417 service_enter_stop_by_notify(s
);
4421 } else if (strv_contains(tags
, "READY=1")) {
4423 s
->notify_state
= NOTIFY_READY
;
4425 /* Type=notify services inform us about completed initialization with READY=1 */
4426 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
4427 s
->state
== SERVICE_START
)
4428 service_enter_start_post(s
);
4430 /* Sending READY=1 while we are reloading informs us that the reloading is complete. */
4431 if (s
->state
== SERVICE_RELOAD_NOTIFY
)
4432 service_enter_running(s
, SERVICE_SUCCESS
);
4434 /* Combined RELOADING=1 and READY=1? Then this is indication that the service started and
4435 * immediately finished reloading. */
4436 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4437 strv_contains(tags
, "RELOADING=1") &&
4438 monotonic_usec
!= USEC_INFINITY
&&
4439 monotonic_usec
>= s
->reload_begin_usec
) {
4440 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
4442 /* Propagate a reload explicitly */
4443 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
4445 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload, ignoring: %s", bus_error_message(&error
, r
));
4447 service_enter_running(s
, SERVICE_SUCCESS
);
4452 } else if (strv_contains(tags
, "RELOADING=1")) {
4454 s
->notify_state
= NOTIFY_RELOADING
;
4456 /* Sending RELOADING=1 after we send SIGHUP to request a reload will transition
4457 * things to "reload-notify" state, where we'll wait for READY=1 to let us know the
4458 * reload is done. Note that we insist on a timestamp being sent along here, so that
4459 * we know for sure this is a reload cycle initiated *after* we sent the signal */
4460 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4461 monotonic_usec
!= USEC_INFINITY
&&
4462 monotonic_usec
>= s
->reload_begin_usec
)
4463 /* Note, we don't call service_enter_reload_by_notify() here, because we
4464 * don't need reload propagation nor do we want to restart the time-out. */
4465 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4467 if (s
->state
== SERVICE_RUNNING
)
4468 service_enter_reload_by_notify(s
);
4473 /* Interpret STATUS= */
4474 e
= strv_find_startswith(tags
, "STATUS=");
4476 _cleanup_free_
char *t
= NULL
;
4479 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4480 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4481 if (strlen(e
) > STATUS_TEXT_MAX
)
4482 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4483 else if (!utf8_is_valid(e
))
4484 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4492 if (!streq_ptr(s
->status_text
, t
)) {
4493 free_and_replace(s
->status_text
, t
);
4498 /* Interpret NOTIFYACCESS= */
4499 e
= strv_find_startswith(tags
, "NOTIFYACCESS=");
4501 NotifyAccess notify_access
;
4503 notify_access
= notify_access_from_string(e
);
4504 if (notify_access
< 0)
4505 log_unit_warning_errno(u
, notify_access
,
4506 "Failed to parse NOTIFYACCESS= field value '%s' in notification message, ignoring: %m", e
);
4508 /* We don't need to check whether the new access mode is more strict than what is
4509 * already in use, since only the privileged process is allowed to change it
4510 * in the first place. */
4511 if (service_get_notify_access(s
) != notify_access
) {
4512 service_override_notify_access(s
, notify_access
);
4517 /* Interpret ERRNO= */
4518 e
= strv_find_startswith(tags
, "ERRNO=");
4522 status_errno
= parse_errno(e
);
4523 if (status_errno
< 0)
4524 log_unit_warning_errno(u
, status_errno
,
4525 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4526 else if (s
->status_errno
!= status_errno
) {
4527 s
->status_errno
= status_errno
;
4532 /* Interpret EXTEND_TIMEOUT= */
4533 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4535 usec_t extend_timeout_usec
;
4536 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4537 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4539 service_extend_timeout(s
, extend_timeout_usec
);
4542 /* Interpret WATCHDOG= */
4543 e
= strv_find_startswith(tags
, "WATCHDOG=");
4546 service_reset_watchdog(s
);
4547 else if (streq(e
, "trigger"))
4548 service_force_watchdog(s
);
4550 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4553 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4555 usec_t watchdog_override_usec
;
4556 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4557 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4559 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4562 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4563 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4564 * fds, but optional when pushing in new fds, for compatibility reasons. */
4565 if (strv_contains(tags
, "FDSTOREREMOVE=1")) {
4568 name
= strv_find_startswith(tags
, "FDNAME=");
4569 if (!name
|| !fdname_is_valid(name
))
4570 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4572 service_remove_fd_store(s
, name
);
4574 } else if (strv_contains(tags
, "FDSTORE=1")) {
4577 name
= strv_find_startswith(tags
, "FDNAME=");
4578 if (name
&& !fdname_is_valid(name
)) {
4579 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4583 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4586 /* Notify clients about changed status or main pid */
4588 unit_add_to_dbus_queue(u
);
4591 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4592 Service
*s
= SERVICE(u
);
4596 if (!s
->timer_event_source
)
4599 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4602 if (t
== USEC_INFINITY
)
4609 static usec_t
service_get_timeout_start_usec(Unit
*u
) {
4610 Service
*s
= SERVICE(ASSERT_PTR(u
));
4611 return s
->timeout_start_usec
;
4614 static bool pick_up_pid_from_bus_name(Service
*s
) {
4617 /* If the service is running but we have no main PID yet, get it from the owner of the D-Bus name */
4619 return !pid_is_valid(s
->main_pid
) &&
4625 SERVICE_RELOAD_SIGNAL
,
4626 SERVICE_RELOAD_NOTIFY
);
4629 static int bus_name_pid_lookup_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*ret_error
) {
4630 const sd_bus_error
*e
;
4631 Unit
*u
= ASSERT_PTR(userdata
);
4639 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4641 if (!s
->bus_name
|| !pick_up_pid_from_bus_name(s
))
4644 e
= sd_bus_message_get_error(reply
);
4646 r
= sd_bus_error_get_errno(e
);
4647 log_warning_errno(r
, "GetConnectionUnixProcessID() failed: %s", bus_error_message(e
, r
));
4651 r
= sd_bus_message_read(reply
, "u", &pid
);
4653 bus_log_parse_error(r
);
4657 if (!pid_is_valid(pid
)) {
4658 log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "GetConnectionUnixProcessID() returned invalid PID");
4662 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, (pid_t
) pid
);
4664 (void) service_set_main_pid(s
, pid
);
4665 (void) unit_watch_pid(UNIT(s
), pid
, false);
4669 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4671 Service
*s
= SERVICE(u
);
4677 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4679 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4681 s
->bus_name_good
= new_owner
;
4683 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4684 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4686 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4690 if (s
->type
== SERVICE_DBUS
) {
4692 /* service_enter_running() will figure out what to
4694 if (s
->state
== SERVICE_RUNNING
)
4695 service_enter_running(s
, SERVICE_SUCCESS
);
4696 else if (s
->state
== SERVICE_START
&& new_owner
)
4697 service_enter_start_post(s
);
4699 } else if (new_owner
&& pick_up_pid_from_bus_name(s
)) {
4701 /* Try to acquire PID from bus service */
4703 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4705 r
= sd_bus_call_method_async(
4706 u
->manager
->api_bus
,
4707 &s
->bus_name_pid_lookup_slot
,
4708 "org.freedesktop.DBus",
4709 "/org/freedesktop/DBus",
4710 "org.freedesktop.DBus",
4711 "GetConnectionUnixProcessID",
4712 bus_name_pid_lookup_callback
,
4717 log_debug_errno(r
, "Failed to request owner PID of service name, ignoring: %m");
4721 int service_set_socket_fd(
4726 bool selinux_context_net
) {
4728 _cleanup_free_
char *peer_text
= NULL
;
4734 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4735 * to be configured. We take ownership of the passed fd on success. */
4737 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4740 if (s
->socket_fd
>= 0)
4743 assert(!s
->socket_peer
);
4745 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4748 if (getpeername_pretty(fd
, true, &peer_text
) >= 0) {
4750 if (UNIT(s
)->description
) {
4751 _cleanup_free_
char *a
= NULL
;
4753 a
= strjoin(UNIT(s
)->description
, " (", peer_text
, ")");
4757 r
= unit_set_description(UNIT(s
), a
);
4759 r
= unit_set_description(UNIT(s
), peer_text
);
4764 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4769 s
->socket_peer
= socket_peer_ref(peer
);
4770 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4772 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4776 static void service_reset_failed(Unit
*u
) {
4777 Service
*s
= SERVICE(u
);
4781 if (s
->state
== SERVICE_FAILED
)
4782 service_set_state(s
, service_determine_dead_state(s
));
4784 s
->result
= SERVICE_SUCCESS
;
4785 s
->reload_result
= SERVICE_SUCCESS
;
4786 s
->clean_result
= SERVICE_SUCCESS
;
4788 s
->flush_n_restarts
= false;
4791 static int service_kill(Unit
*u
, KillWho who
, int signo
, int code
, int value
, sd_bus_error
*error
) {
4792 Service
*s
= SERVICE(u
);
4796 return unit_kill_common(u
, who
, signo
, code
, value
, s
->main_pid
, s
->control_pid
, error
);
4799 static int service_main_pid(Unit
*u
) {
4800 Service
*s
= SERVICE(u
);
4807 static int service_control_pid(Unit
*u
) {
4808 Service
*s
= SERVICE(u
);
4812 return s
->control_pid
;
4815 static bool service_needs_console(Unit
*u
) {
4816 Service
*s
= SERVICE(u
);
4820 /* We provide our own implementation of this here, instead of relying of the generic implementation
4821 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4823 if (!exec_context_may_touch_console(&s
->exec_context
))
4826 return IN_SET(s
->state
,
4833 SERVICE_RELOAD_SIGNAL
,
4834 SERVICE_RELOAD_NOTIFY
,
4836 SERVICE_STOP_WATCHDOG
,
4837 SERVICE_STOP_SIGTERM
,
4838 SERVICE_STOP_SIGKILL
,
4840 SERVICE_FINAL_WATCHDOG
,
4841 SERVICE_FINAL_SIGTERM
,
4842 SERVICE_FINAL_SIGKILL
);
4845 static int service_exit_status(Unit
*u
) {
4846 Service
*s
= SERVICE(u
);
4850 if (s
->main_exec_status
.pid
<= 0 ||
4851 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4854 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4857 return s
->main_exec_status
.status
;
4860 static const char* service_status_text(Unit
*u
) {
4861 Service
*s
= SERVICE(u
);
4865 return s
->status_text
;
4868 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4869 _cleanup_strv_free_
char **l
= NULL
;
4870 bool may_clean_fdstore
= false;
4871 Service
*s
= SERVICE(u
);
4877 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4880 /* Determine if there's anything we could potentially clean */
4881 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4885 if (mask
& EXEC_CLEAN_FDSTORE
)
4886 may_clean_fdstore
= s
->n_fd_store
> 0 || s
->n_fd_store_max
> 0;
4888 if (strv_isempty(l
) && !may_clean_fdstore
)
4889 return -EUNATCH
; /* Nothing to potentially clean */
4891 /* Let's clean the stuff we can clean quickly */
4892 if (may_clean_fdstore
)
4893 service_release_fd_store(s
);
4895 /* If we are done, leave quickly */
4896 if (strv_isempty(l
)) {
4897 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4898 service_set_state(s
, SERVICE_DEAD
);
4902 /* We need to clean disk stuff. This is slow, hence do it out of process, and change state */
4903 service_unwatch_control_pid(s
);
4904 s
->clean_result
= SERVICE_SUCCESS
;
4905 s
->control_command
= NULL
;
4906 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4908 r
= service_arm_timer(s
, /* relative= */ true, s
->exec_context
.timeout_clean_usec
);
4912 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4916 service_set_state(s
, SERVICE_CLEANING
);
4921 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4922 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4923 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
4927 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4928 Service
*s
= SERVICE(u
);
4929 ExecCleanMask mask
= 0;
4935 r
= exec_context_get_clean_mask(&s
->exec_context
, &mask
);
4939 if (s
->n_fd_store_max
> 0)
4940 mask
|= EXEC_CLEAN_FDSTORE
;
4946 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4947 if (t
== JOB_START
&&
4948 result
== JOB_DONE
&&
4949 SERVICE(u
)->type
== SERVICE_ONESHOT
)
4950 return "Finished %s.";
4952 /* Fall back to generic */
4956 static int service_can_start(Unit
*u
) {
4957 Service
*s
= SERVICE(u
);
4962 /* Make sure we don't enter a busy loop of some kind. */
4963 r
= unit_test_start_limit(u
);
4965 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
4972 static void service_release_resources(Unit
*u
) {
4973 Service
*s
= SERVICE(ASSERT_PTR(u
));
4975 /* Invoked by the unit state engine, whenever it realizes that unit is dead and there's no job
4976 * anymore for it, and it hence is a good idea to release resources */
4978 /* Don't release resources if this is a transitionary failed/dead state
4979 * (i.e. SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART), insist on a permanent
4981 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
4984 log_unit_debug(u
, "Releasing resources...");
4986 service_release_socket_fd(s
);
4987 service_release_stdio_fd(s
);
4989 if (s
->fd_store_preserve_mode
!= EXEC_PRESERVE_YES
)
4990 service_release_fd_store(s
);
4992 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4993 service_set_state(s
, SERVICE_DEAD
);
4996 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4997 [SERVICE_RESTART_NO
] = "no",
4998 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4999 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
5000 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
5001 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
5002 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
5003 [SERVICE_RESTART_ALWAYS
] = "always",
5006 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
5008 static const char* const service_restart_mode_table
[_SERVICE_RESTART_MODE_MAX
] = {
5009 [SERVICE_RESTART_MODE_NORMAL
] = "normal",
5010 [SERVICE_RESTART_MODE_DIRECT
] = "direct",
5013 DEFINE_STRING_TABLE_LOOKUP(service_restart_mode
, ServiceRestartMode
);
5015 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
5016 [SERVICE_SIMPLE
] = "simple",
5017 [SERVICE_FORKING
] = "forking",
5018 [SERVICE_ONESHOT
] = "oneshot",
5019 [SERVICE_DBUS
] = "dbus",
5020 [SERVICE_NOTIFY
] = "notify",
5021 [SERVICE_NOTIFY_RELOAD
] = "notify-reload",
5022 [SERVICE_IDLE
] = "idle",
5023 [SERVICE_EXEC
] = "exec",
5026 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
5028 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
5029 [SERVICE_EXIT_MAIN
] = "main",
5030 [SERVICE_EXIT_CGROUP
] = "cgroup",
5033 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
5035 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5036 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
5037 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
5038 [SERVICE_EXEC_START
] = "ExecStart",
5039 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
5040 [SERVICE_EXEC_RELOAD
] = "ExecReload",
5041 [SERVICE_EXEC_STOP
] = "ExecStop",
5042 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
5045 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
5047 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5048 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
5049 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
5050 [SERVICE_EXEC_START
] = "ExecStartEx",
5051 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
5052 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
5053 [SERVICE_EXEC_STOP
] = "ExecStopEx",
5054 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
5057 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
5059 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
5060 [NOTIFY_UNKNOWN
] = "unknown",
5061 [NOTIFY_READY
] = "ready",
5062 [NOTIFY_RELOADING
] = "reloading",
5063 [NOTIFY_STOPPING
] = "stopping",
5066 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
5068 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
5069 [SERVICE_SUCCESS
] = "success",
5070 [SERVICE_FAILURE_RESOURCES
] = "resources",
5071 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
5072 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
5073 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
5074 [SERVICE_FAILURE_SIGNAL
] = "signal",
5075 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
5076 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
5077 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
5078 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
5079 [SERVICE_SKIP_CONDITION
] = "exec-condition",
5082 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
5084 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
5085 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
5086 [SERVICE_TIMEOUT_ABORT
] = "abort",
5087 [SERVICE_TIMEOUT_KILL
] = "kill",
5090 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
5092 const UnitVTable service_vtable
= {
5093 .object_size
= sizeof(Service
),
5094 .exec_context_offset
= offsetof(Service
, exec_context
),
5095 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
5096 .kill_context_offset
= offsetof(Service
, kill_context
),
5097 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
5103 .private_section
= "Service",
5105 .can_transient
= true,
5106 .can_delegate
= true,
5108 .can_set_managed_oom
= true,
5110 .init
= service_init
,
5111 .done
= service_done
,
5112 .load
= service_load
,
5113 .release_resources
= service_release_resources
,
5115 .coldplug
= service_coldplug
,
5117 .dump
= service_dump
,
5119 .start
= service_start
,
5120 .stop
= service_stop
,
5121 .reload
= service_reload
,
5123 .can_reload
= service_can_reload
,
5125 .kill
= service_kill
,
5126 .clean
= service_clean
,
5127 .can_clean
= service_can_clean
,
5129 .freeze
= unit_freeze_vtable_common
,
5130 .thaw
= unit_thaw_vtable_common
,
5132 .serialize
= service_serialize
,
5133 .deserialize_item
= service_deserialize_item
,
5135 .active_state
= service_active_state
,
5136 .sub_state_to_string
= service_sub_state_to_string
,
5138 .will_restart
= service_will_restart
,
5140 .may_gc
= service_may_gc
,
5142 .sigchld_event
= service_sigchld_event
,
5144 .reset_failed
= service_reset_failed
,
5146 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
5147 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
5148 .notify_message
= service_notify_message
,
5150 .main_pid
= service_main_pid
,
5151 .control_pid
= service_control_pid
,
5153 .bus_name_owner_change
= service_bus_name_owner_change
,
5155 .bus_set_property
= bus_service_set_property
,
5156 .bus_commit_properties
= bus_service_commit_properties
,
5158 .get_timeout
= service_get_timeout
,
5159 .get_timeout_start_usec
= service_get_timeout_start_usec
,
5160 .needs_console
= service_needs_console
,
5161 .exit_status
= service_exit_status
,
5162 .status_text
= service_status_text
,
5164 .status_message_formats
= {
5165 .finished_start_job
= {
5166 [JOB_FAILED
] = "Failed to start %s.",
5168 .finished_stop_job
= {
5169 [JOB_DONE
] = "Stopped %s.",
5170 [JOB_FAILED
] = "Stopped (with error) %s.",
5172 .finished_job
= service_finished_job
,
5175 .can_start
= service_can_start
,
5177 .notify_plymouth
= true,
5179 .audit_start_message_type
= AUDIT_SERVICE_START
,
5180 .audit_stop_message_type
= AUDIT_SERVICE_STOP
,