1 /* SPDX-License-Identifier: LGPL-2.1+ */
8 #include "sd-messages.h"
10 #include "alloc-util.h"
12 #include "bus-error.h"
13 #include "bus-kernel.h"
15 #include "dbus-service.h"
16 #include "dbus-unit.h"
20 #include "exit-status.h"
23 #include "format-util.h"
25 #include "load-dropin.h"
26 #include "load-fragment.h"
29 #include "parse-util.h"
30 #include "path-util.h"
31 #include "process-util.h"
32 #include "serialize.h"
34 #include "signal-util.h"
36 #include "stdio-util.h"
37 #include "string-table.h"
38 #include "string-util.h"
40 #include "unit-name.h"
45 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
46 [SERVICE_DEAD
] = UNIT_INACTIVE
,
47 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
48 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
49 [SERVICE_START
] = UNIT_ACTIVATING
,
50 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
51 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
52 [SERVICE_EXITED
] = UNIT_ACTIVE
,
53 [SERVICE_RELOAD
] = UNIT_RELOADING
,
54 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
55 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
59 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
60 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
61 [SERVICE_FAILED
] = UNIT_FAILED
,
62 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
63 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
66 /* For Type=idle we never want to delay any other jobs, hence we
67 * consider idle jobs active as soon as we start working on them */
68 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
69 [SERVICE_DEAD
] = UNIT_INACTIVE
,
70 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
71 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
72 [SERVICE_START
] = UNIT_ACTIVE
,
73 [SERVICE_START_POST
] = UNIT_ACTIVE
,
74 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
75 [SERVICE_EXITED
] = UNIT_ACTIVE
,
76 [SERVICE_RELOAD
] = UNIT_RELOADING
,
77 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
78 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
79 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
80 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
81 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
82 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
83 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
84 [SERVICE_FAILED
] = UNIT_FAILED
,
85 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
86 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
89 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
90 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
91 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
92 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
94 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
95 static void service_enter_reload_by_notify(Service
*s
);
97 static void service_init(Unit
*u
) {
98 Service
*s
= SERVICE(u
);
101 assert(u
->load_state
== UNIT_STUB
);
103 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
104 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
105 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
106 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
107 s
->restart_usec
= u
->manager
->default_restart_usec
;
108 s
->runtime_max_usec
= USEC_INFINITY
;
109 s
->type
= _SERVICE_TYPE_INVALID
;
111 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
112 s
->guess_main_pid
= true;
114 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
116 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
117 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
119 s
->watchdog_original_usec
= USEC_INFINITY
;
121 s
->oom_policy
= _OOM_POLICY_INVALID
;
124 static void service_unwatch_control_pid(Service
*s
) {
127 if (s
->control_pid
<= 0)
130 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
134 static void service_unwatch_main_pid(Service
*s
) {
137 if (s
->main_pid
<= 0)
140 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
144 static void service_unwatch_pid_file(Service
*s
) {
145 if (!s
->pid_file_pathspec
)
148 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
149 path_spec_unwatch(s
->pid_file_pathspec
);
150 path_spec_done(s
->pid_file_pathspec
);
151 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
154 static int service_set_main_pid(Service
*s
, pid_t pid
) {
160 if (pid
== getpid_cached())
163 if (s
->main_pid
== pid
&& s
->main_pid_known
)
166 if (s
->main_pid
!= pid
) {
167 service_unwatch_main_pid(s
);
168 exec_status_start(&s
->main_exec_status
, pid
);
172 s
->main_pid_known
= true;
173 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
175 if (s
->main_pid_alien
)
176 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
181 void service_close_socket_fd(Service
*s
) {
184 /* Undo the effect of service_set_socket_fd(). */
186 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
188 if (UNIT_ISSET(s
->accept_socket
)) {
189 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
190 unit_ref_unset(&s
->accept_socket
);
194 static void service_stop_watchdog(Service
*s
) {
197 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
198 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
201 static void service_start_watchdog(Service
*s
) {
202 usec_t watchdog_usec
;
207 watchdog_usec
= service_get_watchdog_usec(s
);
208 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
209 service_stop_watchdog(s
);
213 if (s
->watchdog_event_source
) {
214 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
216 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
220 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
222 r
= sd_event_add_time(
223 UNIT(s
)->manager
->event
,
224 &s
->watchdog_event_source
,
226 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
227 service_dispatch_watchdog
, s
);
229 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
233 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
235 /* Let's process everything else which might be a sign
236 * of living before we consider a service died. */
237 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
240 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
243 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
249 /* Extends the specified event source timer to at least the specified time, unless it is already later
255 r
= sd_event_source_get_time(source
, ¤t
);
258 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
259 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
263 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
266 r
= sd_event_source_set_time(source
, extended
);
269 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
270 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
274 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
279 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
282 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
284 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
285 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
288 static void service_reset_watchdog(Service
*s
) {
291 dual_timestamp_get(&s
->watchdog_timestamp
);
292 service_start_watchdog(s
);
295 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
298 s
->watchdog_override_enable
= true;
299 s
->watchdog_override_usec
= watchdog_override_usec
;
300 service_reset_watchdog(s
);
302 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
303 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
306 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
312 assert(fs
->service
->n_fd_store
> 0);
313 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
314 fs
->service
->n_fd_store
--;
317 sd_event_source_disable_unref(fs
->event_source
);
324 static void service_release_fd_store(Service
*s
) {
327 if (s
->n_keep_fd_store
> 0)
330 log_unit_debug(UNIT(s
), "Releasing all stored fds");
332 service_fd_store_unlink(s
->fd_store
);
334 assert(s
->n_fd_store
== 0);
337 static void service_release_resources(Unit
*u
) {
338 Service
*s
= SERVICE(u
);
342 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
345 log_unit_debug(u
, "Releasing resources.");
347 s
->stdin_fd
= safe_close(s
->stdin_fd
);
348 s
->stdout_fd
= safe_close(s
->stdout_fd
);
349 s
->stderr_fd
= safe_close(s
->stderr_fd
);
351 service_release_fd_store(s
);
354 static void service_done(Unit
*u
) {
355 Service
*s
= SERVICE(u
);
359 s
->pid_file
= mfree(s
->pid_file
);
360 s
->status_text
= mfree(s
->status_text
);
362 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
363 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
364 s
->control_command
= NULL
;
365 s
->main_command
= NULL
;
367 dynamic_creds_unref(&s
->dynamic_creds
);
369 exit_status_set_free(&s
->restart_prevent_status
);
370 exit_status_set_free(&s
->restart_force_status
);
371 exit_status_set_free(&s
->success_status
);
373 /* This will leak a process, but at least no memory or any of
375 service_unwatch_main_pid(s
);
376 service_unwatch_control_pid(s
);
377 service_unwatch_pid_file(s
);
380 unit_unwatch_bus_name(u
, s
->bus_name
);
381 s
->bus_name
= mfree(s
->bus_name
);
384 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
386 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
387 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
389 service_close_socket_fd(s
);
390 s
->peer
= socket_peer_unref(s
->peer
);
392 unit_ref_unset(&s
->accept_socket
);
394 service_stop_watchdog(s
);
396 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
397 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
399 service_release_resources(u
);
402 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
403 ServiceFDStore
*fs
= userdata
;
408 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
409 log_unit_debug(UNIT(fs
->service
),
410 "Received %s on stored fd %d (%s), closing.",
411 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
412 fs
->fd
, strna(fs
->fdname
));
413 service_fd_store_unlink(fs
);
417 static int service_add_fd_store(Service
*s
, int fd
, const char *name
, bool do_poll
) {
421 /* fd is always consumed if we return >= 0 */
426 if (s
->n_fd_store
>= s
->n_fd_store_max
)
427 return -EXFULL
; /* Our store is full.
428 * Use this errno rather than E[NM]FILE to distinguish from
429 * the case where systemd itself hits the file limit. */
431 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
432 r
= same_fd(fs
->fd
, fd
);
437 return 0; /* fd already included */
441 fs
= new(ServiceFDStore
, 1);
445 *fs
= (ServiceFDStore
) {
449 .fdname
= strdup(name
?: "stored"),
458 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
459 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
464 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
467 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
470 return 1; /* fd newly stored */
473 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
478 while (fdset_size(fds
) > 0) {
479 _cleanup_close_
int fd
= -1;
481 fd
= fdset_steal_first(fds
);
485 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
487 return log_unit_warning_errno(UNIT(s
), r
,
488 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
491 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
493 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
500 static void service_remove_fd_store(Service
*s
, const char *name
) {
501 ServiceFDStore
*fs
, *n
;
506 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
507 if (!streq(fs
->fdname
, name
))
510 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
511 service_fd_store_unlink(fs
);
515 static int service_arm_timer(Service
*s
, usec_t usec
) {
520 if (s
->timer_event_source
) {
521 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
525 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
528 if (usec
== USEC_INFINITY
)
531 r
= sd_event_add_time(
532 UNIT(s
)->manager
->event
,
533 &s
->timer_event_source
,
536 service_dispatch_timer
, s
);
540 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
545 static int service_verify(Service
*s
) {
547 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
549 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
550 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
551 /* FailureAction= only makes sense if one of the start or stop commands is specified.
552 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
553 * either a command or SuccessAction= are required. */
555 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
559 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
560 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
564 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
565 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
569 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
570 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
574 if (s
->type
== SERVICE_ONESHOT
575 && !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
)) {
576 log_unit_error(UNIT(s
), "Service has Restart= set to either always or on-success, which isn't allowed for Type=oneshot services. Refusing.");
580 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
581 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
585 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
586 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
590 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
591 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
593 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
594 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
598 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
599 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
601 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
602 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
604 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
605 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
610 static int service_add_default_dependencies(Service
*s
) {
615 if (!UNIT(s
)->default_dependencies
)
618 /* Add a number of automatic dependencies useful for the
619 * majority of services. */
621 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
622 /* First, pull in the really early boot stuff, and
623 * require it, so that we fail if we can't acquire
626 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
631 /* In the --user instance there's no sysinit.target,
632 * in that case require basic.target instead. */
634 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
639 /* Second, if the rest of the base system is in the same
640 * transaction, order us after it, but do not pull it in or
641 * even require it. */
642 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
646 /* Third, add us in for normal shutdown. */
647 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
650 static void service_fix_stdio(Service
*s
) {
653 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
654 * default value that is subject to automatic overriding triggered by other settings and an explicit
655 * choice the user can make. We don't distinguish between these cases currently. */
657 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
658 s
->exec_context
.stdin_data_size
> 0)
659 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
661 if (IN_SET(s
->exec_context
.std_input
,
663 EXEC_INPUT_TTY_FORCE
,
666 EXEC_INPUT_NAMED_FD
))
669 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
670 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
671 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
672 * duplicated for both input and output at the same time (since they then would cause a feedback
673 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
675 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
676 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
677 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
679 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
680 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
683 static int service_setup_bus_name(Service
*s
) {
691 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
693 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
695 /* We always want to be ordered against dbus.socket if both are in the transaction. */
696 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
698 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
700 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
702 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
704 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
709 static int service_add_extras(Service
*s
) {
714 if (s
->type
== _SERVICE_TYPE_INVALID
) {
715 /* Figure out a type automatically */
717 s
->type
= SERVICE_DBUS
;
718 else if (s
->exec_command
[SERVICE_EXEC_START
])
719 s
->type
= SERVICE_SIMPLE
;
721 s
->type
= SERVICE_ONESHOT
;
724 /* Oneshot services have disabled start timeout by default */
725 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
726 s
->timeout_start_usec
= USEC_INFINITY
;
728 service_fix_stdio(s
);
730 r
= unit_patch_contexts(UNIT(s
));
734 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
738 r
= unit_set_default_slice(UNIT(s
));
742 /* If the service needs the notify socket, let's enable it automatically. */
743 if (s
->notify_access
== NOTIFY_NONE
&&
744 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
745 s
->notify_access
= NOTIFY_MAIN
;
747 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
748 * delegation is on, in that case it we assume the payload knows better what to do and can process
749 * things in a more focused way. */
750 if (s
->oom_policy
< 0)
751 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
753 /* Let the kernel do the killing if that's requested. */
754 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
756 r
= service_add_default_dependencies(s
);
760 r
= service_setup_bus_name(s
);
767 static int service_load(Unit
*u
) {
768 Service
*s
= SERVICE(u
);
771 r
= unit_load_fragment_and_dropin(u
, true);
775 if (u
->load_state
!= UNIT_LOADED
)
778 /* This is a new unit? Then let's add in some extras */
779 r
= service_add_extras(s
);
783 return service_verify(s
);
786 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
787 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
],
788 buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
], buf_abort
[FORMAT_TIMESPAN_MAX
];
789 ServiceExecCommand c
;
790 Service
*s
= SERVICE(u
);
795 prefix
= strempty(prefix
);
796 prefix2
= strjoina(prefix
, "\t");
799 "%sService State: %s\n"
801 "%sReload Result: %s\n"
802 "%sClean Result: %s\n"
803 "%sPermissionsStartOnly: %s\n"
804 "%sRootDirectoryStartOnly: %s\n"
805 "%sRemainAfterExit: %s\n"
806 "%sGuessMainPID: %s\n"
809 "%sNotifyAccess: %s\n"
810 "%sNotifyState: %s\n"
812 prefix
, service_state_to_string(s
->state
),
813 prefix
, service_result_to_string(s
->result
),
814 prefix
, service_result_to_string(s
->reload_result
),
815 prefix
, service_result_to_string(s
->clean_result
),
816 prefix
, yes_no(s
->permissions_start_only
),
817 prefix
, yes_no(s
->root_directory_start_only
),
818 prefix
, yes_no(s
->remain_after_exit
),
819 prefix
, yes_no(s
->guess_main_pid
),
820 prefix
, service_type_to_string(s
->type
),
821 prefix
, service_restart_to_string(s
->restart
),
822 prefix
, notify_access_to_string(s
->notify_access
),
823 prefix
, notify_state_to_string(s
->notify_state
),
824 prefix
, oom_policy_to_string(s
->oom_policy
));
826 if (s
->control_pid
> 0)
828 "%sControl PID: "PID_FMT
"\n",
829 prefix
, s
->control_pid
);
833 "%sMain PID: "PID_FMT
"\n"
834 "%sMain PID Known: %s\n"
835 "%sMain PID Alien: %s\n",
837 prefix
, yes_no(s
->main_pid_known
),
838 prefix
, yes_no(s
->main_pid_alien
));
843 prefix
, s
->pid_file
);
848 "%sBus Name Good: %s\n",
850 prefix
, yes_no(s
->bus_name_good
));
852 if (UNIT_ISSET(s
->accept_socket
))
854 "%sAccept Socket: %s\n",
855 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
859 "%sTimeoutStartSec: %s\n"
860 "%sTimeoutStopSec: %s\n",
861 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
862 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
863 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
));
865 if (s
->timeout_abort_set
)
867 "%sTimeoutAbortSec: %s\n",
868 prefix
, format_timespan(buf_abort
, sizeof(buf_abort
), s
->timeout_abort_usec
, USEC_PER_SEC
));
871 "%sRuntimeMaxSec: %s\n"
872 "%sWatchdogSec: %s\n",
873 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
874 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
876 kill_context_dump(&s
->kill_context
, f
, prefix
);
877 exec_context_dump(&s
->exec_context
, f
, prefix
);
879 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
881 if (!s
->exec_command
[c
])
884 fprintf(f
, "%s-> %s:\n",
885 prefix
, service_exec_command_to_string(c
));
887 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
891 fprintf(f
, "%sStatus Text: %s\n",
892 prefix
, s
->status_text
);
894 if (s
->n_fd_store_max
> 0)
896 "%sFile Descriptor Store Max: %u\n"
897 "%sFile Descriptor Store Current: %zu\n",
898 prefix
, s
->n_fd_store_max
,
899 prefix
, s
->n_fd_store
);
901 cgroup_context_dump(UNIT(s
), f
, prefix
);
904 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
908 assert(pid_is_valid(pid
));
910 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
911 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
914 if (pid
== getpid_cached() || pid
== 1) {
915 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
919 if (pid
== s
->control_pid
) {
920 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
924 if (!pid_is_alive(pid
)) {
925 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
929 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
930 if (owner
== UNIT(s
)) {
931 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
932 return 1; /* Yay, it's definitely a good PID */
935 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
938 static int service_load_pid_file(Service
*s
, bool may_warn
) {
939 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
940 bool questionable_pid_file
= false;
941 _cleanup_free_
char *k
= NULL
;
942 _cleanup_close_
int fd
= -1;
951 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
953 r
= chase_symlinks(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
955 log_unit_full(UNIT(s
), LOG_DEBUG
, r
,
956 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
958 questionable_pid_file
= true;
960 r
= chase_symlinks(s
->pid_file
, NULL
, 0, NULL
, &fd
);
963 return log_unit_full(UNIT(s
), prio
, fd
,
964 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
966 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
967 * chase_symlinks() returned us into a proper fd first. */
968 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
969 r
= read_one_line_file(procfs
, &k
);
971 return log_unit_error_errno(UNIT(s
), r
,
972 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
975 r
= parse_pid(k
, &pid
);
977 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
979 if (s
->main_pid_known
&& pid
== s
->main_pid
)
982 r
= service_is_suitable_main_pid(s
, pid
, prio
);
988 if (questionable_pid_file
) {
989 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
993 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
995 if (fstat(fd
, &st
) < 0)
996 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
998 if (st
.st_uid
!= 0) {
999 log_unit_error(UNIT(s
), "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
1003 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
);
1006 if (s
->main_pid_known
) {
1007 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1009 service_unwatch_main_pid(s
);
1010 s
->main_pid_known
= false;
1012 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1014 r
= service_set_main_pid(s
, pid
);
1018 r
= unit_watch_pid(UNIT(s
), pid
, false);
1019 if (r
< 0) /* FIXME: we need to do something here */
1020 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1025 static void service_search_main_pid(Service
*s
) {
1031 /* If we know it anyway, don't ever fallback to unreliable
1033 if (s
->main_pid_known
)
1036 if (!s
->guess_main_pid
)
1039 assert(s
->main_pid
<= 0);
1041 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1044 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1045 if (service_set_main_pid(s
, pid
) < 0)
1048 r
= unit_watch_pid(UNIT(s
), pid
, false);
1050 /* FIXME: we need to do something here */
1051 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1054 static void service_set_state(Service
*s
, ServiceState state
) {
1055 ServiceState old_state
;
1056 const UnitActiveState
*table
;
1060 if (s
->state
!= state
)
1061 bus_unit_send_pending_change_signal(UNIT(s
), false);
1063 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1065 old_state
= s
->state
;
1068 service_unwatch_pid_file(s
);
1071 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1074 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1075 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1076 SERVICE_AUTO_RESTART
,
1078 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1081 SERVICE_START
, SERVICE_START_POST
,
1082 SERVICE_RUNNING
, SERVICE_RELOAD
,
1083 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1084 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1085 service_unwatch_main_pid(s
);
1086 s
->main_command
= NULL
;
1090 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1092 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1093 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1094 SERVICE_CLEANING
)) {
1095 service_unwatch_control_pid(s
);
1096 s
->control_command
= NULL
;
1097 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1100 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1101 unit_unwatch_all_pids(UNIT(s
));
1102 unit_dequeue_rewatch_pids(UNIT(s
));
1106 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1107 SERVICE_RUNNING
, SERVICE_RELOAD
,
1108 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1109 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1110 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1111 service_close_socket_fd(s
);
1113 if (state
!= SERVICE_START
)
1114 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1116 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1117 service_stop_watchdog(s
);
1119 /* For the inactive states unit_notify() will trim the cgroup,
1120 * but for exit we have to do that ourselves... */
1121 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1122 unit_prune_cgroup(UNIT(s
));
1124 if (old_state
!= state
)
1125 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1127 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1128 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1129 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0) |
1130 (s
->result
== SERVICE_SKIP_CONDITION
? UNIT_NOTIFY_SKIP_CONDITION
: 0));
1133 static usec_t
service_coldplug_timeout(Service
*s
) {
1136 switch (s
->deserialized_state
) {
1138 case SERVICE_CONDITION
:
1139 case SERVICE_START_PRE
:
1141 case SERVICE_START_POST
:
1142 case SERVICE_RELOAD
:
1143 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1145 case SERVICE_RUNNING
:
1146 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1149 case SERVICE_STOP_SIGTERM
:
1150 case SERVICE_STOP_SIGKILL
:
1151 case SERVICE_STOP_POST
:
1152 case SERVICE_FINAL_SIGTERM
:
1153 case SERVICE_FINAL_SIGKILL
:
1154 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1156 case SERVICE_STOP_WATCHDOG
:
1157 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1159 case SERVICE_AUTO_RESTART
:
1160 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1162 case SERVICE_CLEANING
:
1163 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1166 return USEC_INFINITY
;
1170 static int service_coldplug(Unit
*u
) {
1171 Service
*s
= SERVICE(u
);
1175 assert(s
->state
== SERVICE_DEAD
);
1177 if (s
->deserialized_state
== s
->state
)
1180 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1184 if (s
->main_pid
> 0 &&
1185 pid_is_unwaited(s
->main_pid
) &&
1186 (IN_SET(s
->deserialized_state
,
1187 SERVICE_START
, SERVICE_START_POST
,
1188 SERVICE_RUNNING
, SERVICE_RELOAD
,
1189 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1190 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1191 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1196 if (s
->control_pid
> 0 &&
1197 pid_is_unwaited(s
->control_pid
) &&
1198 IN_SET(s
->deserialized_state
,
1199 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1201 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1202 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1203 SERVICE_CLEANING
)) {
1204 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1209 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1210 (void) unit_enqueue_rewatch_pids(u
);
1211 (void) unit_setup_dynamic_creds(u
);
1212 (void) unit_setup_exec_runtime(u
);
1215 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1216 service_start_watchdog(s
);
1218 if (UNIT_ISSET(s
->accept_socket
)) {
1219 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1221 if (socket
->max_connections_per_source
> 0) {
1224 /* Make a best-effort attempt at bumping the connection count */
1225 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1226 socket_peer_unref(s
->peer
);
1232 service_set_state(s
, s
->deserialized_state
);
1236 static int service_collect_fds(
1240 size_t *n_socket_fds
,
1241 size_t *n_storage_fds
) {
1243 _cleanup_strv_free_
char **rfd_names
= NULL
;
1244 _cleanup_free_
int *rfds
= NULL
;
1245 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1251 assert(n_socket_fds
);
1252 assert(n_storage_fds
);
1254 if (s
->socket_fd
>= 0) {
1256 /* Pass the per-connection socket */
1261 rfds
[0] = s
->socket_fd
;
1263 rfd_names
= strv_new("connection");
1273 /* Pass all our configured sockets for singleton services */
1275 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1276 _cleanup_free_
int *cfds
= NULL
;
1280 if (u
->type
!= UNIT_SOCKET
)
1285 cn_fds
= socket_collect_fds(sock
, &cfds
);
1293 rfds
= TAKE_PTR(cfds
);
1294 rn_socket_fds
= cn_fds
;
1298 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1302 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1305 rn_socket_fds
+= cn_fds
;
1308 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1314 if (s
->n_fd_store
> 0) {
1320 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1326 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1331 n_fds
= rn_socket_fds
;
1333 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1334 rfds
[n_fds
] = fs
->fd
;
1335 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1336 if (!rfd_names
[n_fds
])
1343 rfd_names
[n_fds
] = NULL
;
1346 *fds
= TAKE_PTR(rfds
);
1347 *fd_names
= TAKE_PTR(rfd_names
);
1348 *n_socket_fds
= rn_socket_fds
;
1349 *n_storage_fds
= rn_storage_fds
;
1354 static int service_allocate_exec_fd_event_source(
1357 sd_event_source
**ret_event_source
) {
1359 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1364 assert(ret_event_source
);
1366 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1368 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1370 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1372 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1374 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1376 (void) sd_event_source_set_description(source
, "service event_fd");
1378 r
= sd_event_source_set_io_fd_own(source
, true);
1380 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1382 *ret_event_source
= TAKE_PTR(source
);
1386 static int service_allocate_exec_fd(
1388 sd_event_source
**ret_event_source
,
1391 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1395 assert(ret_event_source
);
1396 assert(ret_exec_fd
);
1398 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1399 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1401 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1406 *ret_exec_fd
= TAKE_FD(p
[1]);
1411 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1414 /* Notifications are accepted depending on the process and
1415 * the access setting of the service:
1416 * process: \ access: NONE MAIN EXEC ALL
1417 * main no yes yes yes
1418 * control no no yes yes
1419 * other (forked) no no no yes */
1421 if (flags
& EXEC_IS_CONTROL
)
1422 /* A control process */
1423 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1425 /* We only spawn main processes and control processes, so any
1426 * process that is not a control process is a main process */
1427 return s
->notify_access
!= NOTIFY_NONE
;
1430 static int service_spawn(
1437 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1444 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1445 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1446 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1447 _cleanup_close_
int exec_fd
= -1;
1448 _cleanup_free_
int *fds
= NULL
;
1456 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1460 if (flags
& EXEC_IS_CONTROL
) {
1461 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1462 if (s
->permissions_start_only
)
1463 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1464 if (s
->root_directory_start_only
)
1465 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1468 if ((flags
& EXEC_PASS_FDS
) ||
1469 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1470 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1471 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1473 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1477 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1480 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1481 assert(!s
->exec_fd_event_source
);
1483 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1488 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1492 our_env
= new0(char*, 10);
1496 if (service_exec_needs_notify_socket(s
, flags
))
1497 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1500 if (s
->main_pid
> 0)
1501 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1504 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1505 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1509 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1512 if (s
->socket_fd
>= 0) {
1513 union sockaddr_union sa
;
1514 socklen_t salen
= sizeof(sa
);
1516 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1517 * useful. Note that we do this only when we are still connected at this point in time, which we might
1518 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1519 * in ENOTCONN), and just use whate we can use. */
1521 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1522 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1524 _cleanup_free_
char *addr
= NULL
;
1528 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1532 t
= strjoin("REMOTE_ADDR=", addr
);
1535 our_env
[n_env
++] = t
;
1537 r
= sockaddr_port(&sa
.sa
, &port
);
1541 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1543 our_env
[n_env
++] = t
;
1547 if (flags
& EXEC_SETENV_RESULT
) {
1548 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1551 if (s
->main_exec_status
.pid
> 0 &&
1552 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1553 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1556 if (s
->main_exec_status
.code
== CLD_EXITED
)
1557 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1559 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1565 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1569 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1573 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1574 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1575 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1577 strv_free_and_replace(exec_params
.environment
, final_env
);
1578 exec_params
.fds
= fds
;
1579 exec_params
.fd_names
= fd_names
;
1580 exec_params
.n_socket_fds
= n_socket_fds
;
1581 exec_params
.n_storage_fds
= n_storage_fds
;
1582 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1583 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1584 if (s
->type
== SERVICE_IDLE
)
1585 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1586 exec_params
.stdin_fd
= s
->stdin_fd
;
1587 exec_params
.stdout_fd
= s
->stdout_fd
;
1588 exec_params
.stderr_fd
= s
->stderr_fd
;
1589 exec_params
.exec_fd
= exec_fd
;
1591 r
= exec_spawn(UNIT(s
),
1601 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1602 s
->exec_fd_hot
= false;
1604 r
= unit_watch_pid(UNIT(s
), pid
, true);
1613 static int main_pid_good(Service
*s
) {
1616 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1618 /* If we know the pid file, then let's just check if it is
1620 if (s
->main_pid_known
) {
1622 /* If it's an alien child let's check if it is still
1624 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1625 return pid_is_alive(s
->main_pid
);
1627 /* .. otherwise assume we'll get a SIGCHLD for it,
1628 * which we really should wait for to collect exit
1629 * status and code */
1630 return s
->main_pid
> 0;
1633 /* We don't know the pid */
1637 static int control_pid_good(Service
*s
) {
1640 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1641 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1642 * means: we can't figure it out. */
1644 return s
->control_pid
> 0;
1647 static int cgroup_good(Service
*s
) {
1652 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1655 if (!UNIT(s
)->cgroup_path
)
1658 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1665 static bool service_shall_restart(Service
*s
, const char **reason
) {
1668 /* Don't restart after manual stops */
1669 if (s
->forbid_restart
) {
1670 *reason
= "manual stop";
1674 /* Never restart if this is configured as special exception */
1675 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1676 *reason
= "prevented by exit status";
1680 /* Restart if the exit code/status are configured as restart triggers */
1681 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1682 *reason
= "forced by exit status";
1686 *reason
= "restart setting";
1687 switch (s
->restart
) {
1689 case SERVICE_RESTART_NO
:
1692 case SERVICE_RESTART_ALWAYS
:
1695 case SERVICE_RESTART_ON_SUCCESS
:
1696 return s
->result
== SERVICE_SUCCESS
;
1698 case SERVICE_RESTART_ON_FAILURE
:
1699 return s
->result
!= SERVICE_SUCCESS
;
1701 case SERVICE_RESTART_ON_ABNORMAL
:
1702 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1704 case SERVICE_RESTART_ON_WATCHDOG
:
1705 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1707 case SERVICE_RESTART_ON_ABORT
:
1708 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1711 assert_not_reached("unknown restart setting");
1715 static bool service_will_restart(Unit
*u
) {
1716 Service
*s
= SERVICE(u
);
1720 if (s
->will_auto_restart
)
1722 if (s
->state
== SERVICE_AUTO_RESTART
)
1725 return unit_will_restart_default(u
);
1728 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1729 ServiceState end_state
;
1734 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1735 * undo what has already been enqueued. */
1736 if (unit_stop_pending(UNIT(s
)))
1737 allow_restart
= false;
1739 if (s
->result
== SERVICE_SUCCESS
)
1742 if (s
->result
== SERVICE_SUCCESS
) {
1743 unit_log_success(UNIT(s
));
1744 end_state
= SERVICE_DEAD
;
1745 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1746 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1747 end_state
= SERVICE_DEAD
;
1749 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1750 end_state
= SERVICE_FAILED
;
1752 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1755 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1760 shall_restart
= service_shall_restart(s
, &reason
);
1761 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1762 shall_restart
? "" : "not ",
1765 s
->will_auto_restart
= true;
1768 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1769 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1770 s
->n_keep_fd_store
++;
1772 service_set_state(s
, end_state
);
1774 if (s
->will_auto_restart
) {
1775 s
->will_auto_restart
= false;
1777 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1779 s
->n_keep_fd_store
--;
1783 service_set_state(s
, SERVICE_AUTO_RESTART
);
1785 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1786 * user can still introspect the counter. Do so on the next start. */
1787 s
->flush_n_restarts
= true;
1789 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1790 * queue, so that the fd store is possibly gc'ed again */
1791 s
->n_keep_fd_store
--;
1792 unit_add_to_gc_queue(UNIT(s
));
1794 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1795 s
->forbid_restart
= false;
1797 /* We want fresh tmpdirs in case service is started again immediately */
1798 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1800 /* Also, remove the runtime directory */
1801 unit_destroy_runtime_directory(UNIT(s
), &s
->exec_context
);
1803 /* Get rid of the IPC bits of the user */
1804 unit_unref_uid_gid(UNIT(s
), true);
1806 /* Release the user, and destroy it if we are the only remaining owner */
1807 dynamic_creds_destroy(&s
->dynamic_creds
);
1809 /* Try to delete the pid file. At this point it will be
1810 * out-of-date, and some software might be confused by it, so
1811 * let's remove it. */
1813 (void) unlink(s
->pid_file
);
1815 /* Reset TTY ownership if necessary */
1816 exec_context_revert_tty(&s
->exec_context
);
1821 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1822 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1825 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1829 if (s
->result
== SERVICE_SUCCESS
)
1832 service_unwatch_control_pid(s
);
1833 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1835 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1836 if (s
->control_command
) {
1837 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1839 r
= service_spawn(s
,
1841 s
->timeout_stop_usec
,
1842 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1847 service_set_state(s
, SERVICE_STOP_POST
);
1849 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1854 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1855 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1858 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1861 case SERVICE_STOP_WATCHDOG
:
1862 return KILL_WATCHDOG
;
1864 case SERVICE_STOP_SIGTERM
:
1865 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1866 return KILL_RESTART
;
1869 case SERVICE_FINAL_SIGTERM
:
1870 return KILL_TERMINATE
;
1872 case SERVICE_STOP_SIGKILL
:
1873 case SERVICE_FINAL_SIGKILL
:
1877 return _KILL_OPERATION_INVALID
;
1881 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1886 if (s
->result
== SERVICE_SUCCESS
)
1889 /* Before sending any signal, make sure we track all members of this cgroup */
1890 (void) unit_watch_all_pids(UNIT(s
));
1892 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1894 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1896 r
= unit_kill_context(
1899 state_to_kill_operation(s
, state
),
1907 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1908 state
== SERVICE_STOP_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1912 service_set_state(s
, state
);
1913 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1914 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1915 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1916 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1917 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1918 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1920 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1925 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1927 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1928 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1930 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1933 static void service_enter_stop_by_notify(Service
*s
) {
1936 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1938 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1940 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1941 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1944 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1949 if (s
->result
== SERVICE_SUCCESS
)
1952 service_unwatch_control_pid(s
);
1953 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1955 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1956 if (s
->control_command
) {
1957 s
->control_command_id
= SERVICE_EXEC_STOP
;
1959 r
= service_spawn(s
,
1961 s
->timeout_stop_usec
,
1962 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1967 service_set_state(s
, SERVICE_STOP
);
1969 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1974 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1975 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1978 static bool service_good(Service
*s
) {
1982 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1985 main_pid_ok
= main_pid_good(s
);
1986 if (main_pid_ok
> 0) /* It's alive */
1988 if (main_pid_ok
== 0) /* It's dead */
1991 /* OK, we don't know anything about the main PID, maybe
1992 * because there is none. Let's check the control group
1995 return cgroup_good(s
) != 0;
1998 static void service_enter_running(Service
*s
, ServiceResult f
) {
2001 if (s
->result
== SERVICE_SUCCESS
)
2004 service_unwatch_control_pid(s
);
2006 if (s
->result
!= SERVICE_SUCCESS
)
2007 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2008 else if (service_good(s
)) {
2010 /* If there are any queued up sd_notify() notifications, process them now */
2011 if (s
->notify_state
== NOTIFY_RELOADING
)
2012 service_enter_reload_by_notify(s
);
2013 else if (s
->notify_state
== NOTIFY_STOPPING
)
2014 service_enter_stop_by_notify(s
);
2016 service_set_state(s
, SERVICE_RUNNING
);
2017 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2020 } else if (s
->remain_after_exit
)
2021 service_set_state(s
, SERVICE_EXITED
);
2023 service_enter_stop(s
, SERVICE_SUCCESS
);
2026 static void service_enter_start_post(Service
*s
) {
2030 service_unwatch_control_pid(s
);
2031 service_reset_watchdog(s
);
2033 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2034 if (s
->control_command
) {
2035 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2037 r
= service_spawn(s
,
2039 s
->timeout_start_usec
,
2040 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2045 service_set_state(s
, SERVICE_START_POST
);
2047 service_enter_running(s
, SERVICE_SUCCESS
);
2052 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2053 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2056 static void service_kill_control_process(Service
*s
) {
2061 if (s
->control_pid
<= 0)
2064 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2066 _cleanup_free_
char *comm
= NULL
;
2068 (void) get_process_comm(s
->control_pid
, &comm
);
2070 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2071 s
->control_pid
, strna(comm
));
2075 static int service_adverse_to_leftover_processes(Service
*s
) {
2078 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2079 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2080 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2081 * time is quite variable (so Timeout settings aren't of use).
2083 * Here we take these two factors and refuse to start a service if there are existing processes
2084 * within a control group. Databases, while generally having some protection against multiple
2085 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2086 * aren't as rigoriously written to protect aganst against multiple use. */
2088 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2089 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2090 !s
->kill_context
.send_sigkill
)
2091 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2092 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2097 static void service_enter_start(Service
*s
) {
2105 service_unwatch_control_pid(s
);
2106 service_unwatch_main_pid(s
);
2108 r
= service_adverse_to_leftover_processes(s
);
2112 if (s
->type
== SERVICE_FORKING
) {
2113 s
->control_command_id
= SERVICE_EXEC_START
;
2114 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2116 s
->main_command
= NULL
;
2118 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2119 s
->control_command
= NULL
;
2121 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2125 if (s
->type
!= SERVICE_ONESHOT
) {
2126 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2127 * happen if the configuration changes at runtime. In this case, let's enter a failure
2129 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2134 /* We force a fake state transition here. Otherwise, the unit would go directly from
2135 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2136 * in between. This way we can later trigger actions that depend on the state
2137 * transition, including SuccessAction=. */
2138 service_set_state(s
, SERVICE_START
);
2140 service_enter_start_post(s
);
2144 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2145 /* For simple + idle this is the main process. We don't apply any timeout here, but
2146 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2147 timeout
= USEC_INFINITY
;
2149 timeout
= s
->timeout_start_usec
;
2151 r
= service_spawn(s
,
2154 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2159 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2160 /* For simple services we immediately start
2161 * the START_POST binaries. */
2163 service_set_main_pid(s
, pid
);
2164 service_enter_start_post(s
);
2166 } else if (s
->type
== SERVICE_FORKING
) {
2168 /* For forking services we wait until the start
2169 * process exited. */
2171 s
->control_pid
= pid
;
2172 service_set_state(s
, SERVICE_START
);
2174 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2176 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2178 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2179 * bus. 'notify' and 'exec' services are similar. */
2181 service_set_main_pid(s
, pid
);
2182 service_set_state(s
, SERVICE_START
);
2184 assert_not_reached("Unknown service type");
2189 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2190 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2193 static void service_enter_start_pre(Service
*s
) {
2198 service_unwatch_control_pid(s
);
2200 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2201 if (s
->control_command
) {
2203 r
= service_adverse_to_leftover_processes(s
);
2207 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2209 r
= service_spawn(s
,
2211 s
->timeout_start_usec
,
2212 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2217 service_set_state(s
, SERVICE_START_PRE
);
2219 service_enter_start(s
);
2224 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2225 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2228 static void service_enter_condition(Service
*s
) {
2233 service_unwatch_control_pid(s
);
2235 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2236 if (s
->control_command
) {
2238 r
= service_adverse_to_leftover_processes(s
);
2242 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2244 r
= service_spawn(s
,
2246 s
->timeout_start_usec
,
2247 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2253 service_set_state(s
, SERVICE_CONDITION
);
2255 service_enter_start_pre(s
);
2260 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2261 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2264 static void service_enter_restart(Service
*s
) {
2265 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2270 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2271 /* Don't restart things if we are going down anyway */
2272 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2274 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2281 /* Any units that are bound to this service must also be
2282 * restarted. We use JOB_RESTART (instead of the more obvious
2283 * JOB_START) here so that those dependency jobs will be added
2285 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2289 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2290 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2291 * explicitly however via the usual "systemctl reset-failure" logic. */
2293 s
->flush_n_restarts
= false;
2295 log_struct(LOG_INFO
,
2296 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2297 LOG_UNIT_ID(UNIT(s
)),
2298 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2299 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2300 "N_RESTARTS=%u", s
->n_restarts
);
2302 /* Notify clients about changed restart counter */
2303 unit_add_to_dbus_queue(UNIT(s
));
2305 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2306 * it will be canceled as part of the service_stop() call that
2307 * is executed as part of JOB_RESTART. */
2312 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2313 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2316 static void service_enter_reload_by_notify(Service
*s
) {
2317 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2322 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2323 service_set_state(s
, SERVICE_RELOAD
);
2325 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2326 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2328 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2331 static void service_enter_reload(Service
*s
) {
2336 service_unwatch_control_pid(s
);
2337 s
->reload_result
= SERVICE_SUCCESS
;
2339 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2340 if (s
->control_command
) {
2341 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2343 r
= service_spawn(s
,
2345 s
->timeout_start_usec
,
2346 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2351 service_set_state(s
, SERVICE_RELOAD
);
2353 service_enter_running(s
, SERVICE_SUCCESS
);
2358 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2359 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2360 service_enter_running(s
, SERVICE_SUCCESS
);
2363 static void service_run_next_control(Service
*s
) {
2368 assert(s
->control_command
);
2369 assert(s
->control_command
->command_next
);
2371 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2373 s
->control_command
= s
->control_command
->command_next
;
2374 service_unwatch_control_pid(s
);
2376 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2377 timeout
= s
->timeout_start_usec
;
2379 timeout
= s
->timeout_stop_usec
;
2381 r
= service_spawn(s
,
2384 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2385 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2386 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2387 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2395 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2397 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2398 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2399 else if (s
->state
== SERVICE_STOP_POST
)
2400 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2401 else if (s
->state
== SERVICE_RELOAD
) {
2402 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2403 service_enter_running(s
, SERVICE_SUCCESS
);
2405 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2408 static void service_run_next_main(Service
*s
) {
2413 assert(s
->main_command
);
2414 assert(s
->main_command
->command_next
);
2415 assert(s
->type
== SERVICE_ONESHOT
);
2417 s
->main_command
= s
->main_command
->command_next
;
2418 service_unwatch_main_pid(s
);
2420 r
= service_spawn(s
,
2422 s
->timeout_start_usec
,
2423 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2428 service_set_main_pid(s
, pid
);
2433 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2434 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2437 static int service_start(Unit
*u
) {
2438 Service
*s
= SERVICE(u
);
2443 /* We cannot fulfill this request right now, try again later
2445 if (IN_SET(s
->state
,
2446 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2447 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2450 /* Already on it! */
2451 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2454 /* A service that will be restarted must be stopped first to
2455 * trigger BindsTo and/or OnFailure dependencies. If a user
2456 * does not want to wait for the holdoff time to elapse, the
2457 * service should be manually restarted, not started. We
2458 * simply return EAGAIN here, so that any start jobs stay
2459 * queued, and assume that the auto restart timer will
2460 * eventually trigger the restart. */
2461 if (s
->state
== SERVICE_AUTO_RESTART
)
2464 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2466 /* Make sure we don't enter a busy loop of some kind. */
2467 r
= unit_test_start_limit(u
);
2469 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2473 r
= unit_acquire_invocation_id(u
);
2477 s
->result
= SERVICE_SUCCESS
;
2478 s
->reload_result
= SERVICE_SUCCESS
;
2479 s
->main_pid_known
= false;
2480 s
->main_pid_alien
= false;
2481 s
->forbid_restart
= false;
2483 s
->status_text
= mfree(s
->status_text
);
2484 s
->status_errno
= 0;
2486 s
->notify_state
= NOTIFY_UNKNOWN
;
2488 s
->watchdog_original_usec
= s
->watchdog_usec
;
2489 s
->watchdog_override_enable
= false;
2490 s
->watchdog_override_usec
= USEC_INFINITY
;
2492 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2493 exec_status_reset(&s
->main_exec_status
);
2495 /* This is not an automatic restart? Flush the restart counter then */
2496 if (s
->flush_n_restarts
) {
2498 s
->flush_n_restarts
= false;
2501 u
->reset_accounting
= true;
2503 service_enter_condition(s
);
2507 static int service_stop(Unit
*u
) {
2508 Service
*s
= SERVICE(u
);
2512 /* Don't create restart jobs from manual stops. */
2513 s
->forbid_restart
= true;
2516 if (IN_SET(s
->state
,
2517 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2518 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2521 /* A restart will be scheduled or is in progress. */
2522 if (s
->state
== SERVICE_AUTO_RESTART
) {
2523 service_set_state(s
, SERVICE_DEAD
);
2527 /* If there's already something running we go directly into
2529 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2530 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2534 /* If we are currently cleaning, then abort it, brutally. */
2535 if (s
->state
== SERVICE_CLEANING
) {
2536 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2540 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2542 service_enter_stop(s
, SERVICE_SUCCESS
);
2546 static int service_reload(Unit
*u
) {
2547 Service
*s
= SERVICE(u
);
2551 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2553 service_enter_reload(s
);
2557 _pure_
static bool service_can_reload(Unit
*u
) {
2558 Service
*s
= SERVICE(u
);
2562 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2565 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2566 Service
*s
= SERVICE(u
);
2568 ExecCommand
*first
, *c
;
2572 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2574 first
= s
->exec_command
[id
];
2576 /* Figure out where we are in the list by walking back to the beginning */
2577 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2583 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2584 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2585 size_t allocated
= 0, length
= 0;
2586 Service
*s
= SERVICE(u
);
2587 const char *type
, *key
;
2588 ServiceExecCommand id
;
2598 if (command
== s
->control_command
) {
2600 id
= s
->control_command_id
;
2603 id
= SERVICE_EXEC_START
;
2606 idx
= service_exec_command_index(u
, id
, command
);
2608 STRV_FOREACH(arg
, command
->argv
) {
2609 _cleanup_free_
char *e
= NULL
;
2617 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2621 args
[length
++] = ' ';
2623 args
[length
++] = '"';
2624 memcpy(args
+ length
, e
, n
);
2626 args
[length
++] = '"';
2629 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2634 p
= cescape(command
->path
);
2638 key
= strjoina(type
, "-command");
2639 (void) serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2644 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2645 Service
*s
= SERVICE(u
);
2653 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2654 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2655 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2657 if (s
->control_pid
> 0)
2658 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2660 if (s
->main_pid_known
&& s
->main_pid
> 0)
2661 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2663 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2664 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2665 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2667 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2668 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2670 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2674 service_serialize_exec_command(u
, f
, s
->control_command
);
2675 service_serialize_exec_command(u
, f
, s
->main_command
);
2677 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2680 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2683 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2687 if (s
->exec_fd_event_source
) {
2688 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2692 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2695 if (UNIT_ISSET(s
->accept_socket
)) {
2696 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2701 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2705 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2706 _cleanup_free_
char *c
= NULL
;
2709 copy
= fdset_put_dup(fds
, fs
->fd
);
2711 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2713 c
= cescape(fs
->fdname
);
2717 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2720 if (s
->main_exec_status
.pid
> 0) {
2721 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2722 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2723 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2725 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2726 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2727 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2731 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2732 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2734 if (s
->watchdog_override_enable
)
2735 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2737 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2738 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2743 static int service_deserialize_exec_command(
2746 const char *value
) {
2748 Service
*s
= SERVICE(u
);
2750 unsigned idx
= 0, i
;
2751 bool control
, found
= false;
2752 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2753 ExecCommand
*command
= NULL
;
2754 _cleanup_free_
char *path
= NULL
;
2755 _cleanup_strv_free_
char **argv
= NULL
;
2757 enum ExecCommandState
{
2758 STATE_EXEC_COMMAND_TYPE
,
2759 STATE_EXEC_COMMAND_INDEX
,
2760 STATE_EXEC_COMMAND_PATH
,
2761 STATE_EXEC_COMMAND_ARGS
,
2762 _STATE_EXEC_COMMAND_MAX
,
2763 _STATE_EXEC_COMMAND_INVALID
= -1,
2770 control
= streq(key
, "control-command");
2772 state
= STATE_EXEC_COMMAND_TYPE
;
2775 _cleanup_free_
char *arg
= NULL
;
2777 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2784 case STATE_EXEC_COMMAND_TYPE
:
2785 id
= service_exec_command_from_string(arg
);
2789 state
= STATE_EXEC_COMMAND_INDEX
;
2791 case STATE_EXEC_COMMAND_INDEX
:
2792 r
= safe_atou(arg
, &idx
);
2796 state
= STATE_EXEC_COMMAND_PATH
;
2798 case STATE_EXEC_COMMAND_PATH
:
2799 path
= TAKE_PTR(arg
);
2800 state
= STATE_EXEC_COMMAND_ARGS
;
2802 if (!path_is_absolute(path
))
2805 case STATE_EXEC_COMMAND_ARGS
:
2806 r
= strv_extend(&argv
, arg
);
2811 assert_not_reached("Unknown error at deserialization of exec command");
2816 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2819 /* Let's check whether exec command on given offset matches data that we just deserialized */
2820 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2824 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2829 /* Command at the index we serialized is different, let's look for command that exactly
2830 * matches but is on different index. If there is no such command we will not resume execution. */
2831 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2832 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2836 if (command
&& control
) {
2837 s
->control_command
= command
;
2838 s
->control_command_id
= id
;
2840 s
->main_command
= command
;
2842 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2847 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2848 Service
*s
= SERVICE(u
);
2856 if (streq(key
, "state")) {
2859 state
= service_state_from_string(value
);
2861 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2863 s
->deserialized_state
= state
;
2864 } else if (streq(key
, "result")) {
2867 f
= service_result_from_string(value
);
2869 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2870 else if (f
!= SERVICE_SUCCESS
)
2873 } else if (streq(key
, "reload-result")) {
2876 f
= service_result_from_string(value
);
2878 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2879 else if (f
!= SERVICE_SUCCESS
)
2880 s
->reload_result
= f
;
2882 } else if (streq(key
, "control-pid")) {
2885 if (parse_pid(value
, &pid
) < 0)
2886 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2888 s
->control_pid
= pid
;
2889 } else if (streq(key
, "main-pid")) {
2892 if (parse_pid(value
, &pid
) < 0)
2893 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2895 (void) service_set_main_pid(s
, pid
);
2896 } else if (streq(key
, "main-pid-known")) {
2899 b
= parse_boolean(value
);
2901 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2903 s
->main_pid_known
= b
;
2904 } else if (streq(key
, "bus-name-good")) {
2907 b
= parse_boolean(value
);
2909 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2911 s
->bus_name_good
= b
;
2912 } else if (streq(key
, "bus-name-owner")) {
2913 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2915 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2916 } else if (streq(key
, "status-text")) {
2919 r
= cunescape(value
, 0, &t
);
2921 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2923 free_and_replace(s
->status_text
, t
);
2925 } else if (streq(key
, "accept-socket")) {
2928 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2930 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2932 unit_ref_set(&s
->accept_socket
, u
, socket
);
2933 SOCKET(socket
)->n_connections
++;
2936 } else if (streq(key
, "socket-fd")) {
2939 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2940 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2942 asynchronous_close(s
->socket_fd
);
2943 s
->socket_fd
= fdset_remove(fds
, fd
);
2945 } else if (streq(key
, "fd-store-fd")) {
2946 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
2950 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2951 if (r
<= 0 || safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
)) {
2952 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2956 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2958 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2962 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
2964 /* If the value is not present, we assume the default */
2966 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
2967 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2971 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
2973 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2975 fdset_remove(fds
, fd
);
2976 } else if (streq(key
, "main-exec-status-pid")) {
2979 if (parse_pid(value
, &pid
) < 0)
2980 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2982 s
->main_exec_status
.pid
= pid
;
2983 } else if (streq(key
, "main-exec-status-code")) {
2986 if (safe_atoi(value
, &i
) < 0)
2987 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2989 s
->main_exec_status
.code
= i
;
2990 } else if (streq(key
, "main-exec-status-status")) {
2993 if (safe_atoi(value
, &i
) < 0)
2994 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2996 s
->main_exec_status
.status
= i
;
2997 } else if (streq(key
, "main-exec-status-start"))
2998 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2999 else if (streq(key
, "main-exec-status-exit"))
3000 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3001 else if (streq(key
, "watchdog-timestamp"))
3002 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3003 else if (streq(key
, "forbid-restart")) {
3006 b
= parse_boolean(value
);
3008 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3010 s
->forbid_restart
= b
;
3011 } else if (streq(key
, "stdin-fd")) {
3014 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3015 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3017 asynchronous_close(s
->stdin_fd
);
3018 s
->stdin_fd
= fdset_remove(fds
, fd
);
3019 s
->exec_context
.stdio_as_fds
= true;
3021 } else if (streq(key
, "stdout-fd")) {
3024 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3025 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3027 asynchronous_close(s
->stdout_fd
);
3028 s
->stdout_fd
= fdset_remove(fds
, fd
);
3029 s
->exec_context
.stdio_as_fds
= true;
3031 } else if (streq(key
, "stderr-fd")) {
3034 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3035 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3037 asynchronous_close(s
->stderr_fd
);
3038 s
->stderr_fd
= fdset_remove(fds
, fd
);
3039 s
->exec_context
.stdio_as_fds
= true;
3041 } else if (streq(key
, "exec-fd")) {
3044 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3045 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3047 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3049 fd
= fdset_remove(fds
, fd
);
3050 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3053 } else if (streq(key
, "watchdog-override-usec")) {
3054 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3055 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3057 s
->watchdog_override_enable
= true;
3059 } else if (streq(key
, "watchdog-original-usec")) {
3060 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3061 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3063 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3064 r
= service_deserialize_exec_command(u
, key
, value
);
3066 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3068 } else if (streq(key
, "n-restarts")) {
3069 r
= safe_atou(value
, &s
->n_restarts
);
3071 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3073 } else if (streq(key
, "flush-n-restarts")) {
3074 r
= parse_boolean(value
);
3076 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3078 s
->flush_n_restarts
= r
;
3080 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3085 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3086 const UnitActiveState
*table
;
3090 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3092 return table
[SERVICE(u
)->state
];
3095 static const char *service_sub_state_to_string(Unit
*u
) {
3098 return service_state_to_string(SERVICE(u
)->state
);
3101 static bool service_may_gc(Unit
*u
) {
3102 Service
*s
= SERVICE(u
);
3106 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3107 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3108 * have moved outside of the cgroup. */
3110 if (main_pid_good(s
) > 0 ||
3111 control_pid_good(s
) > 0)
3117 static int service_retry_pid_file(Service
*s
) {
3120 assert(s
->pid_file
);
3121 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3123 r
= service_load_pid_file(s
, false);
3127 service_unwatch_pid_file(s
);
3129 service_enter_running(s
, SERVICE_SUCCESS
);
3133 static int service_watch_pid_file(Service
*s
) {
3136 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3138 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3142 /* the pidfile might have appeared just before we set the watch */
3143 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3144 service_retry_pid_file(s
);
3148 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3149 service_unwatch_pid_file(s
);
3153 static int service_demand_pid_file(Service
*s
) {
3156 assert(s
->pid_file
);
3157 assert(!s
->pid_file_pathspec
);
3159 ps
= new0(PathSpec
, 1);
3164 ps
->path
= strdup(s
->pid_file
);
3170 path_simplify(ps
->path
, false);
3172 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3173 * keep their PID file open all the time. */
3174 ps
->type
= PATH_MODIFIED
;
3175 ps
->inotify_fd
= -1;
3177 s
->pid_file_pathspec
= ps
;
3179 return service_watch_pid_file(s
);
3182 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3183 PathSpec
*p
= userdata
;
3188 s
= SERVICE(p
->unit
);
3192 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3193 assert(s
->pid_file_pathspec
);
3194 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3196 log_unit_debug(UNIT(s
), "inotify event");
3198 if (path_spec_fd_event(p
, events
) < 0)
3201 if (service_retry_pid_file(s
) == 0)
3204 if (service_watch_pid_file(s
) < 0)
3210 service_unwatch_pid_file(s
);
3211 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3215 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3216 Service
*s
= SERVICE(userdata
);
3220 log_unit_debug(UNIT(s
), "got exec-fd event");
3222 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3223 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3224 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3225 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3226 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3227 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3228 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3229 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3235 n
= read(fd
, &x
, sizeof(x
));
3237 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3240 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3242 if (n
== 0) { /* EOF → the event we are waiting for */
3244 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3246 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3247 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3249 s
->exec_fd_hot
= false;
3251 /* Nice! This is what we have been waiting for. Transition to next state. */
3252 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3253 service_enter_start_post(s
);
3255 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3260 /* A byte was read → this turns on/off the exec fd logic */
3261 assert(n
== sizeof(x
));
3268 static void service_notify_cgroup_empty_event(Unit
*u
) {
3269 Service
*s
= SERVICE(u
);
3273 log_unit_debug(u
, "Control group is empty.");
3277 /* Waiting for SIGCHLD is usually more interesting,
3278 * because it includes return codes/signals. Which is
3279 * why we ignore the cgroup events for most cases,
3280 * except when we don't know pid which to expect the
3284 if (s
->type
== SERVICE_NOTIFY
&&
3285 main_pid_good(s
) == 0 &&
3286 control_pid_good(s
) == 0) {
3287 /* No chance of getting a ready notification anymore */
3288 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3293 case SERVICE_START_POST
:
3294 if (s
->pid_file_pathspec
&&
3295 main_pid_good(s
) == 0 &&
3296 control_pid_good(s
) == 0) {
3298 /* Give up hoping for the daemon to write its PID file */
3299 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3301 service_unwatch_pid_file(s
);
3302 if (s
->state
== SERVICE_START
)
3303 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3305 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3309 case SERVICE_RUNNING
:
3310 /* service_enter_running() will figure out what to do */
3311 service_enter_running(s
, SERVICE_SUCCESS
);
3314 case SERVICE_STOP_WATCHDOG
:
3315 case SERVICE_STOP_SIGTERM
:
3316 case SERVICE_STOP_SIGKILL
:
3318 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3319 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3323 case SERVICE_STOP_POST
:
3324 case SERVICE_FINAL_SIGTERM
:
3325 case SERVICE_FINAL_SIGKILL
:
3326 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3327 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3336 static void service_notify_cgroup_oom_event(Unit
*u
) {
3337 Service
*s
= SERVICE(u
);
3339 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3341 if (s
->oom_policy
== OOM_CONTINUE
)
3346 case SERVICE_CONDITION
:
3347 case SERVICE_START_PRE
:
3349 case SERVICE_START_POST
:
3351 if (s
->oom_policy
== OOM_STOP
)
3352 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3353 else if (s
->oom_policy
== OOM_KILL
)
3354 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3358 case SERVICE_EXITED
:
3359 case SERVICE_RUNNING
:
3360 if (s
->oom_policy
== OOM_STOP
)
3361 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3362 else if (s
->oom_policy
== OOM_KILL
)
3363 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3367 case SERVICE_STOP_WATCHDOG
:
3368 case SERVICE_STOP_SIGTERM
:
3369 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3372 case SERVICE_STOP_SIGKILL
:
3373 case SERVICE_FINAL_SIGKILL
:
3374 if (s
->result
== SERVICE_SUCCESS
)
3375 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3378 case SERVICE_STOP_POST
:
3379 case SERVICE_FINAL_SIGTERM
:
3380 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3388 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3389 bool notify_dbus
= true;
3390 Service
*s
= SERVICE(u
);
3392 ExitClean clean_mode
;
3397 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3398 * considered daemons as they are typically not long running. */
3399 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3400 clean_mode
= EXIT_CLEAN_COMMAND
;
3402 clean_mode
= EXIT_CLEAN_DAEMON
;
3404 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3405 f
= SERVICE_SUCCESS
;
3406 else if (code
== CLD_EXITED
)
3407 f
= SERVICE_FAILURE_EXIT_CODE
;
3408 else if (code
== CLD_KILLED
)
3409 f
= SERVICE_FAILURE_SIGNAL
;
3410 else if (code
== CLD_DUMPED
)
3411 f
= SERVICE_FAILURE_CORE_DUMP
;
3413 assert_not_reached("Unknown code");
3415 if (s
->main_pid
== pid
) {
3416 /* Forking services may occasionally move to a new PID.
3417 * As long as they update the PID file before exiting the old
3418 * PID, they're fine. */
3419 if (service_load_pid_file(s
, false) > 0)
3423 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3425 if (s
->main_command
) {
3426 /* If this is not a forking service than the
3427 * main process got started and hence we copy
3428 * the exit status so that it is recorded both
3429 * as main and as control process exit
3432 s
->main_command
->exec_status
= s
->main_exec_status
;
3434 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3435 f
= SERVICE_SUCCESS
;
3436 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3438 /* If this is a forked process, then we should
3439 * ignore the return value if this was
3440 * configured for the starter process */
3442 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3443 f
= SERVICE_SUCCESS
;
3446 unit_log_process_exit(
3449 service_exec_command_to_string(SERVICE_EXEC_START
),
3450 f
== SERVICE_SUCCESS
,
3453 if (s
->result
== SERVICE_SUCCESS
)
3456 if (s
->main_command
&&
3457 s
->main_command
->command_next
&&
3458 s
->type
== SERVICE_ONESHOT
&&
3459 f
== SERVICE_SUCCESS
) {
3461 /* There is another command to *
3462 * execute, so let's do that. */
3464 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3465 service_run_next_main(s
);
3469 /* The service exited, so the service is officially
3471 s
->main_command
= NULL
;
3475 case SERVICE_START_POST
:
3476 case SERVICE_RELOAD
:
3478 /* Need to wait until the operation is
3483 if (s
->type
== SERVICE_ONESHOT
) {
3484 /* This was our main goal, so let's go on */
3485 if (f
== SERVICE_SUCCESS
)
3486 service_enter_start_post(s
);
3488 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3490 } else if (s
->type
== SERVICE_NOTIFY
) {
3491 /* Only enter running through a notification, so that the
3492 * SERVICE_START state signifies that no ready notification
3493 * has been received */
3494 if (f
!= SERVICE_SUCCESS
)
3495 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3496 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3497 /* The service has never been and will never be active */
3498 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3503 case SERVICE_RUNNING
:
3504 service_enter_running(s
, f
);
3507 case SERVICE_STOP_WATCHDOG
:
3508 case SERVICE_STOP_SIGTERM
:
3509 case SERVICE_STOP_SIGKILL
:
3511 if (control_pid_good(s
) <= 0)
3512 service_enter_stop_post(s
, f
);
3514 /* If there is still a control process, wait for that first */
3517 case SERVICE_STOP_POST
:
3519 if (control_pid_good(s
) <= 0)
3520 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3524 case SERVICE_FINAL_SIGTERM
:
3525 case SERVICE_FINAL_SIGKILL
:
3527 if (control_pid_good(s
) <= 0)
3528 service_enter_dead(s
, f
, true);
3532 assert_not_reached("Uh, main process died at wrong time.");
3536 } else if (s
->control_pid
== pid
) {
3539 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3540 if (f
== SERVICE_FAILURE_EXIT_CODE
&& s
->state
== SERVICE_CONDITION
&& status
< 255)
3541 f
= SERVICE_SKIP_CONDITION
;
3543 if (s
->control_command
) {
3544 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3546 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3547 f
= SERVICE_SUCCESS
;
3550 unit_log_process_exit(
3553 service_exec_command_to_string(s
->control_command_id
),
3554 f
== SERVICE_SUCCESS
,
3557 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3560 if (s
->control_command
&&
3561 s
->control_command
->command_next
&&
3562 f
== SERVICE_SUCCESS
) {
3564 /* There is another command to *
3565 * execute, so let's do that. */
3567 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3568 service_run_next_control(s
);
3571 /* No further commands for this step, so let's
3572 * figure out what to do next */
3574 s
->control_command
= NULL
;
3575 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3577 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3581 case SERVICE_CONDITION
:
3582 if (f
== SERVICE_SUCCESS
)
3583 service_enter_start_pre(s
);
3585 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3588 case SERVICE_START_PRE
:
3589 if (f
== SERVICE_SUCCESS
)
3590 service_enter_start(s
);
3592 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3596 if (s
->type
!= SERVICE_FORKING
)
3597 /* Maybe spurious event due to a reload that changed the type? */
3600 if (f
!= SERVICE_SUCCESS
) {
3601 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3606 bool has_start_post
;
3609 /* Let's try to load the pid file here if we can.
3610 * The PID file might actually be created by a START_POST
3611 * script. In that case don't worry if the loading fails. */
3613 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3614 r
= service_load_pid_file(s
, !has_start_post
);
3615 if (!has_start_post
&& r
< 0) {
3616 r
= service_demand_pid_file(s
);
3617 if (r
< 0 || cgroup_good(s
) == 0)
3618 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3622 service_search_main_pid(s
);
3624 service_enter_start_post(s
);
3627 case SERVICE_START_POST
:
3628 if (f
!= SERVICE_SUCCESS
) {
3629 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3636 r
= service_load_pid_file(s
, true);
3638 r
= service_demand_pid_file(s
);
3639 if (r
< 0 || cgroup_good(s
) == 0)
3640 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3644 service_search_main_pid(s
);
3646 service_enter_running(s
, SERVICE_SUCCESS
);
3649 case SERVICE_RELOAD
:
3650 if (f
== SERVICE_SUCCESS
)
3651 if (service_load_pid_file(s
, true) < 0)
3652 service_search_main_pid(s
);
3654 s
->reload_result
= f
;
3655 service_enter_running(s
, SERVICE_SUCCESS
);
3659 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3662 case SERVICE_STOP_WATCHDOG
:
3663 case SERVICE_STOP_SIGTERM
:
3664 case SERVICE_STOP_SIGKILL
:
3665 if (main_pid_good(s
) <= 0)
3666 service_enter_stop_post(s
, f
);
3668 /* If there is still a service process around, wait until
3669 * that one quit, too */
3672 case SERVICE_STOP_POST
:
3673 if (main_pid_good(s
) <= 0)
3674 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3677 case SERVICE_FINAL_SIGTERM
:
3678 case SERVICE_FINAL_SIGKILL
:
3679 if (main_pid_good(s
) <= 0)
3680 service_enter_dead(s
, f
, true);
3683 case SERVICE_CLEANING
:
3685 if (s
->clean_result
== SERVICE_SUCCESS
)
3686 s
->clean_result
= f
;
3688 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3692 assert_not_reached("Uh, control process died at wrong time.");
3695 } else /* Neither control nor main PID? If so, don't notify about anything */
3696 notify_dbus
= false;
3698 /* Notify clients about changed exit status */
3700 unit_add_to_dbus_queue(u
);
3702 /* We watch the main/control process otherwise we can't retrieve the unit they
3703 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3704 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3705 * detect when the cgroup becomes empty. Note that the control process is always
3706 * our child so it's pointless to watch all other processes. */
3707 if (!control_pid_good(s
))
3708 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3709 (void) unit_enqueue_rewatch_pids(u
);
3712 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3713 Service
*s
= SERVICE(userdata
);
3716 assert(source
== s
->timer_event_source
);
3720 case SERVICE_CONDITION
:
3721 case SERVICE_START_PRE
:
3723 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3724 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3727 case SERVICE_START_POST
:
3728 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3729 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3732 case SERVICE_RUNNING
:
3733 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3734 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3737 case SERVICE_RELOAD
:
3738 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3739 service_kill_control_process(s
);
3740 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3741 service_enter_running(s
, SERVICE_SUCCESS
);
3745 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3746 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3749 case SERVICE_STOP_WATCHDOG
:
3750 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3751 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3754 case SERVICE_STOP_SIGTERM
:
3755 if (s
->kill_context
.send_sigkill
) {
3756 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3757 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3759 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3760 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3765 case SERVICE_STOP_SIGKILL
:
3766 /* Uh, we sent a SIGKILL and it is still not gone?
3767 * Must be something we cannot kill, so let's just be
3768 * weirded out and continue */
3770 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3771 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3774 case SERVICE_STOP_POST
:
3775 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3776 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3779 case SERVICE_FINAL_SIGTERM
:
3780 if (s
->kill_context
.send_sigkill
) {
3781 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3782 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3784 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3785 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3790 case SERVICE_FINAL_SIGKILL
:
3791 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3792 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3795 case SERVICE_AUTO_RESTART
:
3796 if (s
->restart_usec
> 0) {
3797 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3798 log_unit_debug(UNIT(s
),
3799 "Service RestartSec=%s expired, scheduling restart.",
3800 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3802 log_unit_debug(UNIT(s
),
3803 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3805 service_enter_restart(s
);
3808 case SERVICE_CLEANING
:
3809 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3811 if (s
->clean_result
== SERVICE_SUCCESS
)
3812 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3814 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3818 assert_not_reached("Timeout at wrong time.");
3824 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3825 Service
*s
= SERVICE(userdata
);
3826 char t
[FORMAT_TIMESPAN_MAX
];
3827 usec_t watchdog_usec
;
3830 assert(source
== s
->watchdog_event_source
);
3832 watchdog_usec
= service_get_watchdog_usec(s
);
3834 if (UNIT(s
)->manager
->service_watchdogs
) {
3835 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3836 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3838 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3840 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3841 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3846 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
3849 if (s
->notify_access
== NOTIFY_NONE
) {
3850 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3854 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3855 if (s
->main_pid
!= 0)
3856 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
);
3858 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
);
3863 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3864 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3865 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
,
3866 pid
, s
->main_pid
, s
->control_pid
);
3867 else if (s
->main_pid
!= 0)
3868 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
);
3869 else if (s
->control_pid
!= 0)
3870 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
);
3872 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
);
3880 static void service_force_watchdog(Service
*s
) {
3881 if (!UNIT(s
)->manager
->service_watchdogs
)
3884 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3885 s
->status_text
? s
->status_text
: "<unset>");
3887 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3890 static void service_notify_message(
3892 const struct ucred
*ucred
,
3896 Service
*s
= SERVICE(u
);
3897 bool notify_dbus
= false;
3905 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, fds
))
3908 if (DEBUG_LOGGING
) {
3909 _cleanup_free_
char *cc
= NULL
;
3911 cc
= strv_join(tags
, ", ");
3912 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3915 /* Interpret MAINPID= */
3916 e
= strv_find_startswith(tags
, "MAINPID=");
3917 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3920 if (parse_pid(e
, &new_main_pid
) < 0)
3921 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3922 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3924 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3926 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
3928 if (ucred
->uid
== 0) {
3929 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
);
3932 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3935 service_set_main_pid(s
, new_main_pid
);
3937 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
3939 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3946 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3947 STRV_FOREACH_BACKWARDS(i
, tags
) {
3949 if (streq(*i
, "READY=1")) {
3950 s
->notify_state
= NOTIFY_READY
;
3952 /* Type=notify services inform us about completed
3953 * initialization with READY=1 */
3954 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3955 service_enter_start_post(s
);
3957 /* Sending READY=1 while we are reloading informs us
3958 * that the reloading is complete */
3959 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3960 service_enter_running(s
, SERVICE_SUCCESS
);
3965 } else if (streq(*i
, "RELOADING=1")) {
3966 s
->notify_state
= NOTIFY_RELOADING
;
3968 if (s
->state
== SERVICE_RUNNING
)
3969 service_enter_reload_by_notify(s
);
3974 } else if (streq(*i
, "STOPPING=1")) {
3975 s
->notify_state
= NOTIFY_STOPPING
;
3977 if (s
->state
== SERVICE_RUNNING
)
3978 service_enter_stop_by_notify(s
);
3985 /* Interpret STATUS= */
3986 e
= strv_find_startswith(tags
, "STATUS=");
3988 _cleanup_free_
char *t
= NULL
;
3991 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3992 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3993 if (strlen(e
) > STATUS_TEXT_MAX
)
3994 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3995 else if (!utf8_is_valid(e
))
3996 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4004 if (!streq_ptr(s
->status_text
, t
)) {
4005 free_and_replace(s
->status_text
, t
);
4010 /* Interpret ERRNO= */
4011 e
= strv_find_startswith(tags
, "ERRNO=");
4015 status_errno
= parse_errno(e
);
4016 if (status_errno
< 0)
4017 log_unit_warning_errno(u
, status_errno
,
4018 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4019 else if (s
->status_errno
!= status_errno
) {
4020 s
->status_errno
= status_errno
;
4025 /* Interpret EXTEND_TIMEOUT= */
4026 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4028 usec_t extend_timeout_usec
;
4029 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4030 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4032 service_extend_timeout(s
, extend_timeout_usec
);
4035 /* Interpret WATCHDOG= */
4036 e
= strv_find_startswith(tags
, "WATCHDOG=");
4039 service_reset_watchdog(s
);
4040 else if (streq(e
, "trigger"))
4041 service_force_watchdog(s
);
4043 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4046 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4048 usec_t watchdog_override_usec
;
4049 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4050 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4052 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4055 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4056 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4057 * fds, but optional when pushing in new fds, for compatibility reasons. */
4058 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4061 name
= strv_find_startswith(tags
, "FDNAME=");
4062 if (!name
|| !fdname_is_valid(name
))
4063 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4065 service_remove_fd_store(s
, name
);
4067 } else if (strv_find(tags
, "FDSTORE=1")) {
4070 name
= strv_find_startswith(tags
, "FDNAME=");
4071 if (name
&& !fdname_is_valid(name
)) {
4072 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4076 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4079 /* Notify clients about changed status or main pid */
4081 unit_add_to_dbus_queue(u
);
4084 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4085 Service
*s
= SERVICE(u
);
4089 if (!s
->timer_event_source
)
4092 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4095 if (t
== USEC_INFINITY
)
4102 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4104 Service
*s
= SERVICE(u
);
4110 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4112 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4114 s
->bus_name_good
= !!new_owner
;
4116 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4117 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4119 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4123 if (s
->type
== SERVICE_DBUS
) {
4125 /* service_enter_running() will figure out what to
4127 if (s
->state
== SERVICE_RUNNING
)
4128 service_enter_running(s
, SERVICE_SUCCESS
);
4129 else if (s
->state
== SERVICE_START
&& new_owner
)
4130 service_enter_start_post(s
);
4132 } else if (new_owner
&&
4140 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4143 /* Try to acquire PID from bus service */
4145 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4147 r
= sd_bus_creds_get_pid(creds
, &pid
);
4149 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4151 service_set_main_pid(s
, pid
);
4152 unit_watch_pid(UNIT(s
), pid
, false);
4157 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4158 _cleanup_free_
char *peer
= NULL
;
4164 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4165 * to be configured. We take ownership of the passed fd on success. */
4167 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4170 if (s
->socket_fd
>= 0)
4173 if (s
->state
!= SERVICE_DEAD
)
4176 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4178 if (UNIT(s
)->description
) {
4179 _cleanup_free_
char *a
;
4181 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4185 r
= unit_set_description(UNIT(s
), a
);
4187 r
= unit_set_description(UNIT(s
), peer
);
4193 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4198 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4200 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4204 static void service_reset_failed(Unit
*u
) {
4205 Service
*s
= SERVICE(u
);
4209 if (s
->state
== SERVICE_FAILED
)
4210 service_set_state(s
, SERVICE_DEAD
);
4212 s
->result
= SERVICE_SUCCESS
;
4213 s
->reload_result
= SERVICE_SUCCESS
;
4214 s
->clean_result
= SERVICE_SUCCESS
;
4216 s
->flush_n_restarts
= false;
4219 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4220 Service
*s
= SERVICE(u
);
4224 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4227 static int service_main_pid(Unit
*u
) {
4228 Service
*s
= SERVICE(u
);
4235 static int service_control_pid(Unit
*u
) {
4236 Service
*s
= SERVICE(u
);
4240 return s
->control_pid
;
4243 static bool service_needs_console(Unit
*u
) {
4244 Service
*s
= SERVICE(u
);
4248 /* We provide our own implementation of this here, instead of relying of the generic implementation
4249 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4251 if (!exec_context_may_touch_console(&s
->exec_context
))
4254 return IN_SET(s
->state
,
4262 SERVICE_STOP_WATCHDOG
,
4263 SERVICE_STOP_SIGTERM
,
4264 SERVICE_STOP_SIGKILL
,
4266 SERVICE_FINAL_SIGTERM
,
4267 SERVICE_FINAL_SIGKILL
);
4270 static int service_exit_status(Unit
*u
) {
4271 Service
*s
= SERVICE(u
);
4275 if (s
->main_exec_status
.pid
<= 0 ||
4276 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4279 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4282 return s
->main_exec_status
.status
;
4285 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4286 _cleanup_strv_free_
char **l
= NULL
;
4287 Service
*s
= SERVICE(u
);
4293 if (s
->state
!= SERVICE_DEAD
)
4296 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4300 if (strv_isempty(l
))
4303 service_unwatch_control_pid(s
);
4304 s
->clean_result
= SERVICE_SUCCESS
;
4305 s
->control_command
= NULL
;
4306 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4308 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4312 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4316 service_set_state(s
, SERVICE_CLEANING
);
4321 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4322 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4323 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4327 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4328 Service
*s
= SERVICE(u
);
4332 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4335 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4336 if (t
== JOB_START
&& result
== JOB_DONE
) {
4337 Service
*s
= SERVICE(u
);
4339 if (s
->type
== SERVICE_ONESHOT
)
4340 return "Finished %s.";
4343 /* Fall back to generic */
4347 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4348 [SERVICE_RESTART_NO
] = "no",
4349 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4350 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4351 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4352 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4353 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4354 [SERVICE_RESTART_ALWAYS
] = "always",
4357 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4359 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4360 [SERVICE_SIMPLE
] = "simple",
4361 [SERVICE_FORKING
] = "forking",
4362 [SERVICE_ONESHOT
] = "oneshot",
4363 [SERVICE_DBUS
] = "dbus",
4364 [SERVICE_NOTIFY
] = "notify",
4365 [SERVICE_IDLE
] = "idle",
4366 [SERVICE_EXEC
] = "exec",
4369 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4371 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4372 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4373 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4374 [SERVICE_EXEC_START
] = "ExecStart",
4375 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4376 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4377 [SERVICE_EXEC_STOP
] = "ExecStop",
4378 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4381 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4383 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4384 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4385 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4386 [SERVICE_EXEC_START
] = "ExecStartEx",
4387 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4388 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4389 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4390 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4393 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4395 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4396 [NOTIFY_UNKNOWN
] = "unknown",
4397 [NOTIFY_READY
] = "ready",
4398 [NOTIFY_RELOADING
] = "reloading",
4399 [NOTIFY_STOPPING
] = "stopping",
4402 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4404 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4405 [SERVICE_SUCCESS
] = "success",
4406 [SERVICE_FAILURE_RESOURCES
] = "resources",
4407 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4408 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4409 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4410 [SERVICE_FAILURE_SIGNAL
] = "signal",
4411 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4412 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4413 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4414 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4415 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4418 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4420 const UnitVTable service_vtable
= {
4421 .object_size
= sizeof(Service
),
4422 .exec_context_offset
= offsetof(Service
, exec_context
),
4423 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4424 .kill_context_offset
= offsetof(Service
, kill_context
),
4425 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4426 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4432 .private_section
= "Service",
4434 .can_transient
= true,
4435 .can_delegate
= true,
4438 .init
= service_init
,
4439 .done
= service_done
,
4440 .load
= service_load
,
4441 .release_resources
= service_release_resources
,
4443 .coldplug
= service_coldplug
,
4445 .dump
= service_dump
,
4447 .start
= service_start
,
4448 .stop
= service_stop
,
4449 .reload
= service_reload
,
4451 .can_reload
= service_can_reload
,
4453 .kill
= service_kill
,
4454 .clean
= service_clean
,
4455 .can_clean
= service_can_clean
,
4457 .freeze
= unit_freeze_vtable_common
,
4458 .thaw
= unit_thaw_vtable_common
,
4460 .serialize
= service_serialize
,
4461 .deserialize_item
= service_deserialize_item
,
4463 .active_state
= service_active_state
,
4464 .sub_state_to_string
= service_sub_state_to_string
,
4466 .will_restart
= service_will_restart
,
4468 .may_gc
= service_may_gc
,
4470 .sigchld_event
= service_sigchld_event
,
4472 .reset_failed
= service_reset_failed
,
4474 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4475 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4476 .notify_message
= service_notify_message
,
4478 .main_pid
= service_main_pid
,
4479 .control_pid
= service_control_pid
,
4481 .bus_name_owner_change
= service_bus_name_owner_change
,
4483 .bus_set_property
= bus_service_set_property
,
4484 .bus_commit_properties
= bus_service_commit_properties
,
4486 .get_timeout
= service_get_timeout
,
4487 .needs_console
= service_needs_console
,
4488 .exit_status
= service_exit_status
,
4490 .status_message_formats
= {
4491 .starting_stopping
= {
4492 [0] = "Starting %s...",
4493 [1] = "Stopping %s...",
4495 .finished_start_job
= {
4496 [JOB_FAILED
] = "Failed to start %s.",
4497 [JOB_SKIPPED
] = "Skipped %s.",
4499 .finished_stop_job
= {
4500 [JOB_DONE
] = "Stopped %s.",
4501 [JOB_FAILED
] = "Stopped (with error) %s.",
4503 .finished_job
= service_finished_job
,