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 usec_t
service_get_watchdog_usec(Service
*s
) {
204 if (s
->watchdog_override_enable
)
205 return s
->watchdog_override_usec
;
207 return s
->watchdog_original_usec
;
210 static void service_start_watchdog(Service
*s
) {
211 usec_t watchdog_usec
;
216 watchdog_usec
= service_get_watchdog_usec(s
);
217 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
218 service_stop_watchdog(s
);
222 if (s
->watchdog_event_source
) {
223 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
225 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
229 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
231 r
= sd_event_add_time(
232 UNIT(s
)->manager
->event
,
233 &s
->watchdog_event_source
,
235 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
236 service_dispatch_watchdog
, s
);
238 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
242 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
244 /* Let's process everything else which might be a sign
245 * of living before we consider a service died. */
246 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
249 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
252 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
258 /* Extends the specified event source timer to at least the specified time, unless it is already later
264 r
= sd_event_source_get_time(source
, ¤t
);
267 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
268 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
272 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
275 r
= sd_event_source_set_time(source
, extended
);
278 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
279 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
283 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
288 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
291 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
293 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
294 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
297 static void service_reset_watchdog(Service
*s
) {
300 dual_timestamp_get(&s
->watchdog_timestamp
);
301 service_start_watchdog(s
);
304 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
307 s
->watchdog_override_enable
= true;
308 s
->watchdog_override_usec
= watchdog_override_usec
;
309 service_reset_watchdog(s
);
311 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
312 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
315 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
321 assert(fs
->service
->n_fd_store
> 0);
322 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
323 fs
->service
->n_fd_store
--;
326 sd_event_source_disable_unref(fs
->event_source
);
333 static void service_release_fd_store(Service
*s
) {
336 if (s
->n_keep_fd_store
> 0)
339 log_unit_debug(UNIT(s
), "Releasing all stored fds");
341 service_fd_store_unlink(s
->fd_store
);
343 assert(s
->n_fd_store
== 0);
346 static void service_release_resources(Unit
*u
) {
347 Service
*s
= SERVICE(u
);
351 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
354 log_unit_debug(u
, "Releasing resources.");
356 s
->stdin_fd
= safe_close(s
->stdin_fd
);
357 s
->stdout_fd
= safe_close(s
->stdout_fd
);
358 s
->stderr_fd
= safe_close(s
->stderr_fd
);
360 service_release_fd_store(s
);
363 static void service_done(Unit
*u
) {
364 Service
*s
= SERVICE(u
);
368 s
->pid_file
= mfree(s
->pid_file
);
369 s
->status_text
= mfree(s
->status_text
);
371 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
372 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
373 s
->control_command
= NULL
;
374 s
->main_command
= NULL
;
376 dynamic_creds_unref(&s
->dynamic_creds
);
378 exit_status_set_free(&s
->restart_prevent_status
);
379 exit_status_set_free(&s
->restart_force_status
);
380 exit_status_set_free(&s
->success_status
);
382 /* This will leak a process, but at least no memory or any of
384 service_unwatch_main_pid(s
);
385 service_unwatch_control_pid(s
);
386 service_unwatch_pid_file(s
);
389 unit_unwatch_bus_name(u
, s
->bus_name
);
390 s
->bus_name
= mfree(s
->bus_name
);
393 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
395 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
396 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
398 service_close_socket_fd(s
);
399 s
->peer
= socket_peer_unref(s
->peer
);
401 unit_ref_unset(&s
->accept_socket
);
403 service_stop_watchdog(s
);
405 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
406 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
408 service_release_resources(u
);
411 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
412 ServiceFDStore
*fs
= userdata
;
417 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
418 log_unit_debug(UNIT(fs
->service
),
419 "Received %s on stored fd %d (%s), closing.",
420 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
421 fs
->fd
, strna(fs
->fdname
));
422 service_fd_store_unlink(fs
);
426 static int service_add_fd_store(Service
*s
, int fd
, const char *name
) {
430 /* fd is always consumed if we return >= 0 */
435 if (s
->n_fd_store
>= s
->n_fd_store_max
)
436 return -EXFULL
; /* Our store is full.
437 * Use this errno rather than E[NM]FILE to distinguish from
438 * the case where systemd itself hits the file limit. */
440 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
441 r
= same_fd(fs
->fd
, fd
);
446 return 0; /* fd already included */
450 fs
= new0(ServiceFDStore
, 1);
456 fs
->fdname
= strdup(name
?: "stored");
462 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
463 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
468 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
470 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
473 return 1; /* fd newly stored */
476 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
) {
481 while (fdset_size(fds
) > 0) {
482 _cleanup_close_
int fd
= -1;
484 fd
= fdset_steal_first(fds
);
488 r
= service_add_fd_store(s
, fd
, name
);
490 return log_unit_warning_errno(UNIT(s
), r
,
491 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
494 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
496 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
503 static void service_remove_fd_store(Service
*s
, const char *name
) {
504 ServiceFDStore
*fs
, *n
;
509 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
510 if (!streq(fs
->fdname
, name
))
513 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
514 service_fd_store_unlink(fs
);
518 static int service_arm_timer(Service
*s
, usec_t usec
) {
523 if (s
->timer_event_source
) {
524 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
528 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
531 if (usec
== USEC_INFINITY
)
534 r
= sd_event_add_time(
535 UNIT(s
)->manager
->event
,
536 &s
->timer_event_source
,
539 service_dispatch_timer
, s
);
543 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
548 static int service_verify(Service
*s
) {
550 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
552 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
553 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
554 /* FailureAction= only makes sense if one of the start or stop commands is specified.
555 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
556 * either a command or SuccessAction= are required. */
558 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
562 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
563 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
567 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
568 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
572 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
573 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
577 if (s
->type
== SERVICE_ONESHOT
578 && !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
)) {
579 log_unit_error(UNIT(s
), "Service has Restart= set to either always or on-success, which isn't allowed for Type=oneshot services. Refusing.");
583 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
584 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
588 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
589 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
593 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
594 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
596 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
597 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
601 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
602 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
604 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
605 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
607 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
608 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
613 static int service_add_default_dependencies(Service
*s
) {
618 if (!UNIT(s
)->default_dependencies
)
621 /* Add a number of automatic dependencies useful for the
622 * majority of services. */
624 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
625 /* First, pull in the really early boot stuff, and
626 * require it, so that we fail if we can't acquire
629 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
634 /* In the --user instance there's no sysinit.target,
635 * in that case require basic.target instead. */
637 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
642 /* Second, if the rest of the base system is in the same
643 * transaction, order us after it, but do not pull it in or
644 * even require it. */
645 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
649 /* Third, add us in for normal shutdown. */
650 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
653 static void service_fix_output(Service
*s
) {
656 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
657 * however, since in that case we want output to default to the same place as we read input from. */
659 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
660 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
661 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
662 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
664 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
665 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
666 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
668 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
669 s
->exec_context
.stdin_data_size
> 0)
670 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
673 static int service_setup_bus_name(Service
*s
) {
681 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
683 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
685 /* We always want to be ordered against dbus.socket if both are in the transaction. */
686 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
688 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
690 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
692 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
694 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
699 static int service_add_extras(Service
*s
) {
704 if (s
->type
== _SERVICE_TYPE_INVALID
) {
705 /* Figure out a type automatically */
707 s
->type
= SERVICE_DBUS
;
708 else if (s
->exec_command
[SERVICE_EXEC_START
])
709 s
->type
= SERVICE_SIMPLE
;
711 s
->type
= SERVICE_ONESHOT
;
714 /* Oneshot services have disabled start timeout by default */
715 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
716 s
->timeout_start_usec
= USEC_INFINITY
;
718 service_fix_output(s
);
720 r
= unit_patch_contexts(UNIT(s
));
724 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
728 r
= unit_set_default_slice(UNIT(s
));
732 /* If the service needs the notify socket, let's enable it automatically. */
733 if (s
->notify_access
== NOTIFY_NONE
&&
734 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
735 s
->notify_access
= NOTIFY_MAIN
;
737 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
738 * delegation is on, in that case it we assume the payload knows better what to do and can process
739 * things in a more focused way. */
740 if (s
->oom_policy
< 0)
741 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
743 /* Let the kernel do the killing if that's requested. */
744 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
746 r
= service_add_default_dependencies(s
);
750 r
= service_setup_bus_name(s
);
757 static int service_load(Unit
*u
) {
758 Service
*s
= SERVICE(u
);
761 r
= unit_load_fragment_and_dropin(u
, true);
765 if (u
->load_state
!= UNIT_LOADED
)
768 /* This is a new unit? Then let's add in some extras */
769 r
= service_add_extras(s
);
773 return service_verify(s
);
776 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
777 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
],
778 buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
], buf_abort
[FORMAT_TIMESPAN_MAX
];
779 ServiceExecCommand c
;
780 Service
*s
= SERVICE(u
);
785 prefix
= strempty(prefix
);
786 prefix2
= strjoina(prefix
, "\t");
789 "%sService State: %s\n"
791 "%sReload Result: %s\n"
792 "%sClean Result: %s\n"
793 "%sPermissionsStartOnly: %s\n"
794 "%sRootDirectoryStartOnly: %s\n"
795 "%sRemainAfterExit: %s\n"
796 "%sGuessMainPID: %s\n"
799 "%sNotifyAccess: %s\n"
800 "%sNotifyState: %s\n"
802 prefix
, service_state_to_string(s
->state
),
803 prefix
, service_result_to_string(s
->result
),
804 prefix
, service_result_to_string(s
->reload_result
),
805 prefix
, service_result_to_string(s
->clean_result
),
806 prefix
, yes_no(s
->permissions_start_only
),
807 prefix
, yes_no(s
->root_directory_start_only
),
808 prefix
, yes_no(s
->remain_after_exit
),
809 prefix
, yes_no(s
->guess_main_pid
),
810 prefix
, service_type_to_string(s
->type
),
811 prefix
, service_restart_to_string(s
->restart
),
812 prefix
, notify_access_to_string(s
->notify_access
),
813 prefix
, notify_state_to_string(s
->notify_state
),
814 prefix
, oom_policy_to_string(s
->oom_policy
));
816 if (s
->control_pid
> 0)
818 "%sControl PID: "PID_FMT
"\n",
819 prefix
, s
->control_pid
);
823 "%sMain PID: "PID_FMT
"\n"
824 "%sMain PID Known: %s\n"
825 "%sMain PID Alien: %s\n",
827 prefix
, yes_no(s
->main_pid_known
),
828 prefix
, yes_no(s
->main_pid_alien
));
833 prefix
, s
->pid_file
);
838 "%sBus Name Good: %s\n",
840 prefix
, yes_no(s
->bus_name_good
));
842 if (UNIT_ISSET(s
->accept_socket
))
844 "%sAccept Socket: %s\n",
845 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
849 "%sTimeoutStartSec: %s\n"
850 "%sTimeoutStopSec: %s\n",
851 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
852 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
853 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
));
855 if (s
->timeout_abort_set
)
857 "%sTimeoutAbortSec: %s\n",
858 prefix
, format_timespan(buf_abort
, sizeof(buf_abort
), s
->timeout_abort_usec
, USEC_PER_SEC
));
861 "%sRuntimeMaxSec: %s\n"
862 "%sWatchdogSec: %s\n",
863 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
864 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
866 kill_context_dump(&s
->kill_context
, f
, prefix
);
867 exec_context_dump(&s
->exec_context
, f
, prefix
);
869 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
871 if (!s
->exec_command
[c
])
874 fprintf(f
, "%s-> %s:\n",
875 prefix
, service_exec_command_to_string(c
));
877 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
881 fprintf(f
, "%sStatus Text: %s\n",
882 prefix
, s
->status_text
);
884 if (s
->n_fd_store_max
> 0)
886 "%sFile Descriptor Store Max: %u\n"
887 "%sFile Descriptor Store Current: %zu\n",
888 prefix
, s
->n_fd_store_max
,
889 prefix
, s
->n_fd_store
);
891 cgroup_context_dump(UNIT(s
), f
, prefix
);
894 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
898 assert(pid_is_valid(pid
));
900 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
901 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
904 if (pid
== getpid_cached() || pid
== 1) {
905 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
909 if (pid
== s
->control_pid
) {
910 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
914 if (!pid_is_alive(pid
)) {
915 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
919 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
920 if (owner
== UNIT(s
)) {
921 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
922 return 1; /* Yay, it's definitely a good PID */
925 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
928 static int service_load_pid_file(Service
*s
, bool may_warn
) {
929 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
930 bool questionable_pid_file
= false;
931 _cleanup_free_
char *k
= NULL
;
932 _cleanup_close_
int fd
= -1;
941 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
943 r
= chase_symlinks(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
945 log_unit_full(UNIT(s
), LOG_DEBUG
, r
,
946 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
948 questionable_pid_file
= true;
950 r
= chase_symlinks(s
->pid_file
, NULL
, 0, NULL
, &fd
);
953 return log_unit_full(UNIT(s
), prio
, fd
,
954 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
956 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
957 * chase_symlinks() returned us into a proper fd first. */
958 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
959 r
= read_one_line_file(procfs
, &k
);
961 return log_unit_error_errno(UNIT(s
), r
,
962 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
965 r
= parse_pid(k
, &pid
);
967 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
969 if (s
->main_pid_known
&& pid
== s
->main_pid
)
972 r
= service_is_suitable_main_pid(s
, pid
, prio
);
978 if (questionable_pid_file
) {
979 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
983 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
985 if (fstat(fd
, &st
) < 0)
986 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
988 if (st
.st_uid
!= 0) {
989 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
);
993 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
);
996 if (s
->main_pid_known
) {
997 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
999 service_unwatch_main_pid(s
);
1000 s
->main_pid_known
= false;
1002 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1004 r
= service_set_main_pid(s
, pid
);
1008 r
= unit_watch_pid(UNIT(s
), pid
, false);
1009 if (r
< 0) /* FIXME: we need to do something here */
1010 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1015 static void service_search_main_pid(Service
*s
) {
1021 /* If we know it anyway, don't ever fallback to unreliable
1023 if (s
->main_pid_known
)
1026 if (!s
->guess_main_pid
)
1029 assert(s
->main_pid
<= 0);
1031 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1034 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1035 if (service_set_main_pid(s
, pid
) < 0)
1038 r
= unit_watch_pid(UNIT(s
), pid
, false);
1040 /* FIXME: we need to do something here */
1041 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1044 static void service_set_state(Service
*s
, ServiceState state
) {
1045 ServiceState old_state
;
1046 const UnitActiveState
*table
;
1050 if (s
->state
!= state
)
1051 bus_unit_send_pending_change_signal(UNIT(s
), false);
1053 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1055 old_state
= s
->state
;
1058 service_unwatch_pid_file(s
);
1061 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1064 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1065 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1066 SERVICE_AUTO_RESTART
,
1068 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1071 SERVICE_START
, SERVICE_START_POST
,
1072 SERVICE_RUNNING
, SERVICE_RELOAD
,
1073 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1074 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1075 service_unwatch_main_pid(s
);
1076 s
->main_command
= NULL
;
1080 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1082 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1083 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1084 SERVICE_CLEANING
)) {
1085 service_unwatch_control_pid(s
);
1086 s
->control_command
= NULL
;
1087 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1090 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1091 unit_unwatch_all_pids(UNIT(s
));
1092 unit_dequeue_rewatch_pids(UNIT(s
));
1096 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1097 SERVICE_RUNNING
, SERVICE_RELOAD
,
1098 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1099 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1100 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1101 service_close_socket_fd(s
);
1103 if (state
!= SERVICE_START
)
1104 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1106 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1107 service_stop_watchdog(s
);
1109 /* For the inactive states unit_notify() will trim the cgroup,
1110 * but for exit we have to do that ourselves... */
1111 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1112 unit_prune_cgroup(UNIT(s
));
1114 if (old_state
!= state
)
1115 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1117 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1118 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1119 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0) |
1120 (s
->result
== SERVICE_SKIP_CONDITION
? UNIT_NOTIFY_SKIP_CONDITION
: 0));
1123 static usec_t
service_coldplug_timeout(Service
*s
) {
1126 switch (s
->deserialized_state
) {
1128 case SERVICE_CONDITION
:
1129 case SERVICE_START_PRE
:
1131 case SERVICE_START_POST
:
1132 case SERVICE_RELOAD
:
1133 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1135 case SERVICE_RUNNING
:
1136 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1139 case SERVICE_STOP_SIGTERM
:
1140 case SERVICE_STOP_SIGKILL
:
1141 case SERVICE_STOP_POST
:
1142 case SERVICE_FINAL_SIGTERM
:
1143 case SERVICE_FINAL_SIGKILL
:
1144 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1146 case SERVICE_STOP_WATCHDOG
:
1147 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1149 case SERVICE_AUTO_RESTART
:
1150 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1152 case SERVICE_CLEANING
:
1153 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1156 return USEC_INFINITY
;
1160 static int service_coldplug(Unit
*u
) {
1161 Service
*s
= SERVICE(u
);
1165 assert(s
->state
== SERVICE_DEAD
);
1167 if (s
->deserialized_state
== s
->state
)
1170 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1174 if (s
->main_pid
> 0 &&
1175 pid_is_unwaited(s
->main_pid
) &&
1176 (IN_SET(s
->deserialized_state
,
1177 SERVICE_START
, SERVICE_START_POST
,
1178 SERVICE_RUNNING
, SERVICE_RELOAD
,
1179 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1180 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1181 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1186 if (s
->control_pid
> 0 &&
1187 pid_is_unwaited(s
->control_pid
) &&
1188 IN_SET(s
->deserialized_state
,
1189 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1191 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1192 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1193 SERVICE_CLEANING
)) {
1194 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1199 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1200 (void) unit_enqueue_rewatch_pids(u
);
1201 (void) unit_setup_dynamic_creds(u
);
1202 (void) unit_setup_exec_runtime(u
);
1205 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1206 service_start_watchdog(s
);
1208 if (UNIT_ISSET(s
->accept_socket
)) {
1209 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1211 if (socket
->max_connections_per_source
> 0) {
1214 /* Make a best-effort attempt at bumping the connection count */
1215 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1216 socket_peer_unref(s
->peer
);
1222 service_set_state(s
, s
->deserialized_state
);
1226 static int service_collect_fds(
1230 size_t *n_socket_fds
,
1231 size_t *n_storage_fds
) {
1233 _cleanup_strv_free_
char **rfd_names
= NULL
;
1234 _cleanup_free_
int *rfds
= NULL
;
1235 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1241 assert(n_socket_fds
);
1242 assert(n_storage_fds
);
1244 if (s
->socket_fd
>= 0) {
1246 /* Pass the per-connection socket */
1251 rfds
[0] = s
->socket_fd
;
1253 rfd_names
= strv_new("connection");
1263 /* Pass all our configured sockets for singleton services */
1265 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1266 _cleanup_free_
int *cfds
= NULL
;
1270 if (u
->type
!= UNIT_SOCKET
)
1275 cn_fds
= socket_collect_fds(sock
, &cfds
);
1283 rfds
= TAKE_PTR(cfds
);
1284 rn_socket_fds
= cn_fds
;
1288 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1292 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1295 rn_socket_fds
+= cn_fds
;
1298 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1304 if (s
->n_fd_store
> 0) {
1310 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1316 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1321 n_fds
= rn_socket_fds
;
1323 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1324 rfds
[n_fds
] = fs
->fd
;
1325 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1326 if (!rfd_names
[n_fds
])
1333 rfd_names
[n_fds
] = NULL
;
1336 *fds
= TAKE_PTR(rfds
);
1337 *fd_names
= TAKE_PTR(rfd_names
);
1338 *n_socket_fds
= rn_socket_fds
;
1339 *n_storage_fds
= rn_storage_fds
;
1344 static int service_allocate_exec_fd_event_source(
1347 sd_event_source
**ret_event_source
) {
1349 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1354 assert(ret_event_source
);
1356 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1358 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1360 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1362 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1364 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1366 (void) sd_event_source_set_description(source
, "service event_fd");
1368 r
= sd_event_source_set_io_fd_own(source
, true);
1370 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1372 *ret_event_source
= TAKE_PTR(source
);
1376 static int service_allocate_exec_fd(
1378 sd_event_source
**ret_event_source
,
1381 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1385 assert(ret_event_source
);
1386 assert(ret_exec_fd
);
1388 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1389 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1391 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1396 *ret_exec_fd
= TAKE_FD(p
[1]);
1401 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1404 /* Notifications are accepted depending on the process and
1405 * the access setting of the service:
1406 * process: \ access: NONE MAIN EXEC ALL
1407 * main no yes yes yes
1408 * control no no yes yes
1409 * other (forked) no no no yes */
1411 if (flags
& EXEC_IS_CONTROL
)
1412 /* A control process */
1413 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1415 /* We only spawn main processes and control processes, so any
1416 * process that is not a control process is a main process */
1417 return s
->notify_access
!= NOTIFY_NONE
;
1420 static int service_spawn(
1427 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1434 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1435 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1436 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1437 _cleanup_close_
int exec_fd
= -1;
1438 _cleanup_free_
int *fds
= NULL
;
1446 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1450 if (flags
& EXEC_IS_CONTROL
) {
1451 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1452 if (s
->permissions_start_only
)
1453 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1454 if (s
->root_directory_start_only
)
1455 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1458 if ((flags
& EXEC_PASS_FDS
) ||
1459 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1460 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1461 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1463 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1467 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1470 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1471 assert(!s
->exec_fd_event_source
);
1473 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1478 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1482 our_env
= new0(char*, 10);
1486 if (service_exec_needs_notify_socket(s
, flags
))
1487 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1490 if (s
->main_pid
> 0)
1491 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1494 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1495 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1499 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1502 if (s
->socket_fd
>= 0) {
1503 union sockaddr_union sa
;
1504 socklen_t salen
= sizeof(sa
);
1506 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1507 * useful. Note that we do this only when we are still connected at this point in time, which we might
1508 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1509 * in ENOTCONN), and just use whate we can use. */
1511 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1512 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1514 _cleanup_free_
char *addr
= NULL
;
1518 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1522 t
= strjoin("REMOTE_ADDR=", addr
);
1525 our_env
[n_env
++] = t
;
1527 r
= sockaddr_port(&sa
.sa
, &port
);
1531 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1533 our_env
[n_env
++] = t
;
1537 if (flags
& EXEC_SETENV_RESULT
) {
1538 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1541 if (s
->main_exec_status
.pid
> 0 &&
1542 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1543 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1546 if (s
->main_exec_status
.code
== CLD_EXITED
)
1547 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1549 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1555 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1559 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1563 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1564 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1565 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1567 strv_free_and_replace(exec_params
.environment
, final_env
);
1568 exec_params
.fds
= fds
;
1569 exec_params
.fd_names
= fd_names
;
1570 exec_params
.n_socket_fds
= n_socket_fds
;
1571 exec_params
.n_storage_fds
= n_storage_fds
;
1572 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1573 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1574 if (s
->type
== SERVICE_IDLE
)
1575 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1576 exec_params
.stdin_fd
= s
->stdin_fd
;
1577 exec_params
.stdout_fd
= s
->stdout_fd
;
1578 exec_params
.stderr_fd
= s
->stderr_fd
;
1579 exec_params
.exec_fd
= exec_fd
;
1581 r
= exec_spawn(UNIT(s
),
1591 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1592 s
->exec_fd_hot
= false;
1594 r
= unit_watch_pid(UNIT(s
), pid
, true);
1603 static int main_pid_good(Service
*s
) {
1606 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1608 /* If we know the pid file, then let's just check if it is
1610 if (s
->main_pid_known
) {
1612 /* If it's an alien child let's check if it is still
1614 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1615 return pid_is_alive(s
->main_pid
);
1617 /* .. otherwise assume we'll get a SIGCHLD for it,
1618 * which we really should wait for to collect exit
1619 * status and code */
1620 return s
->main_pid
> 0;
1623 /* We don't know the pid */
1627 static int control_pid_good(Service
*s
) {
1630 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1631 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1632 * means: we can't figure it out. */
1634 return s
->control_pid
> 0;
1637 static int cgroup_good(Service
*s
) {
1642 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1645 if (!UNIT(s
)->cgroup_path
)
1648 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1655 static bool service_shall_restart(Service
*s
, const char **reason
) {
1658 /* Don't restart after manual stops */
1659 if (s
->forbid_restart
) {
1660 *reason
= "manual stop";
1664 /* Never restart if this is configured as special exception */
1665 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1666 *reason
= "prevented by exit status";
1670 /* Restart if the exit code/status are configured as restart triggers */
1671 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1672 *reason
= "forced by exit status";
1676 *reason
= "restart setting";
1677 switch (s
->restart
) {
1679 case SERVICE_RESTART_NO
:
1682 case SERVICE_RESTART_ALWAYS
:
1685 case SERVICE_RESTART_ON_SUCCESS
:
1686 return s
->result
== SERVICE_SUCCESS
;
1688 case SERVICE_RESTART_ON_FAILURE
:
1689 return s
->result
!= SERVICE_SUCCESS
;
1691 case SERVICE_RESTART_ON_ABNORMAL
:
1692 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1694 case SERVICE_RESTART_ON_WATCHDOG
:
1695 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1697 case SERVICE_RESTART_ON_ABORT
:
1698 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1701 assert_not_reached("unknown restart setting");
1705 static bool service_will_restart(Unit
*u
) {
1706 Service
*s
= SERVICE(u
);
1710 if (s
->will_auto_restart
)
1712 if (s
->state
== SERVICE_AUTO_RESTART
)
1715 return unit_will_restart_default(u
);
1718 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1719 ServiceState end_state
;
1724 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1725 * undo what has already been enqueued. */
1726 if (unit_stop_pending(UNIT(s
)))
1727 allow_restart
= false;
1729 if (s
->result
== SERVICE_SUCCESS
)
1732 if (s
->result
== SERVICE_SUCCESS
) {
1733 unit_log_success(UNIT(s
));
1734 end_state
= SERVICE_DEAD
;
1735 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1736 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1737 end_state
= SERVICE_DEAD
;
1739 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1740 end_state
= SERVICE_FAILED
;
1744 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1749 shall_restart
= service_shall_restart(s
, &reason
);
1750 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1751 shall_restart
? "" : "not ",
1754 s
->will_auto_restart
= true;
1757 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1758 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1759 s
->n_keep_fd_store
++;
1761 service_set_state(s
, end_state
);
1763 if (s
->will_auto_restart
) {
1764 s
->will_auto_restart
= false;
1766 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1768 s
->n_keep_fd_store
--;
1772 service_set_state(s
, SERVICE_AUTO_RESTART
);
1774 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1775 * user can still introspect the counter. Do so on the next start. */
1776 s
->flush_n_restarts
= true;
1778 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1779 * queue, so that the fd store is possibly gc'ed again */
1780 s
->n_keep_fd_store
--;
1781 unit_add_to_gc_queue(UNIT(s
));
1783 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1784 s
->forbid_restart
= false;
1786 /* We want fresh tmpdirs in case service is started again immediately */
1787 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1789 /* Also, remove the runtime directory */
1790 unit_destroy_runtime_directory(UNIT(s
), &s
->exec_context
);
1792 /* Get rid of the IPC bits of the user */
1793 unit_unref_uid_gid(UNIT(s
), true);
1795 /* Release the user, and destroy it if we are the only remaining owner */
1796 dynamic_creds_destroy(&s
->dynamic_creds
);
1798 /* Try to delete the pid file. At this point it will be
1799 * out-of-date, and some software might be confused by it, so
1800 * let's remove it. */
1802 (void) unlink(s
->pid_file
);
1804 /* Reset TTY ownership if necessary */
1805 exec_context_revert_tty(&s
->exec_context
);
1810 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1811 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1814 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1818 if (s
->result
== SERVICE_SUCCESS
)
1821 service_unwatch_control_pid(s
);
1822 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1824 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1825 if (s
->control_command
) {
1826 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1828 r
= service_spawn(s
,
1830 s
->timeout_stop_usec
,
1831 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1836 service_set_state(s
, SERVICE_STOP_POST
);
1838 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1843 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1844 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1847 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1850 case SERVICE_STOP_WATCHDOG
:
1851 return KILL_WATCHDOG
;
1853 case SERVICE_STOP_SIGTERM
:
1854 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1855 return KILL_RESTART
;
1858 case SERVICE_FINAL_SIGTERM
:
1859 return KILL_TERMINATE
;
1861 case SERVICE_STOP_SIGKILL
:
1862 case SERVICE_FINAL_SIGKILL
:
1866 return _KILL_OPERATION_INVALID
;
1870 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1875 if (s
->result
== SERVICE_SUCCESS
)
1878 /* Before sending any signal, make sure we track all members of this cgroup */
1879 (void) unit_watch_all_pids(UNIT(s
));
1881 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1883 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1885 r
= unit_kill_context(
1888 state_to_kill_operation(s
, state
),
1896 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1897 state
== SERVICE_STOP_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1901 service_set_state(s
, state
);
1902 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1903 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1904 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1905 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1906 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1907 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1909 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1914 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1916 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1917 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1919 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1922 static void service_enter_stop_by_notify(Service
*s
) {
1925 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1927 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1929 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1930 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1933 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1938 if (s
->result
== SERVICE_SUCCESS
)
1941 service_unwatch_control_pid(s
);
1942 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1944 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1945 if (s
->control_command
) {
1946 s
->control_command_id
= SERVICE_EXEC_STOP
;
1948 r
= service_spawn(s
,
1950 s
->timeout_stop_usec
,
1951 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1956 service_set_state(s
, SERVICE_STOP
);
1958 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1963 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1964 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1967 static bool service_good(Service
*s
) {
1971 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1974 main_pid_ok
= main_pid_good(s
);
1975 if (main_pid_ok
> 0) /* It's alive */
1977 if (main_pid_ok
== 0) /* It's dead */
1980 /* OK, we don't know anything about the main PID, maybe
1981 * because there is none. Let's check the control group
1984 return cgroup_good(s
) != 0;
1987 static void service_enter_running(Service
*s
, ServiceResult f
) {
1990 if (s
->result
== SERVICE_SUCCESS
)
1993 service_unwatch_control_pid(s
);
1995 if (s
->result
!= SERVICE_SUCCESS
)
1996 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1997 else if (service_good(s
)) {
1999 /* If there are any queued up sd_notify() notifications, process them now */
2000 if (s
->notify_state
== NOTIFY_RELOADING
)
2001 service_enter_reload_by_notify(s
);
2002 else if (s
->notify_state
== NOTIFY_STOPPING
)
2003 service_enter_stop_by_notify(s
);
2005 service_set_state(s
, SERVICE_RUNNING
);
2006 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2009 } else if (s
->remain_after_exit
)
2010 service_set_state(s
, SERVICE_EXITED
);
2012 service_enter_stop(s
, SERVICE_SUCCESS
);
2015 static void service_enter_start_post(Service
*s
) {
2019 service_unwatch_control_pid(s
);
2020 service_reset_watchdog(s
);
2022 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2023 if (s
->control_command
) {
2024 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2026 r
= service_spawn(s
,
2028 s
->timeout_start_usec
,
2029 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2034 service_set_state(s
, SERVICE_START_POST
);
2036 service_enter_running(s
, SERVICE_SUCCESS
);
2041 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2042 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2045 static void service_kill_control_process(Service
*s
) {
2050 if (s
->control_pid
<= 0)
2053 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2055 _cleanup_free_
char *comm
= NULL
;
2057 (void) get_process_comm(s
->control_pid
, &comm
);
2059 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2060 s
->control_pid
, strna(comm
));
2064 static int service_adverse_to_leftover_processes(Service
*s
) {
2067 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2068 * SendSIGKILL is used for services that require a clean shutdown. These are typically database
2069 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or
2070 * startup time is quite variable (so Timeout settings aren't of use).
2072 * Here we take these two factors and refuse to start a service if there are existing processes
2073 * within a control group. Databases, while generally having some protection against multiple
2074 * instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service
2075 * aren't as rigoriously written to protect aganst against multiple use. */
2076 if (unit_warn_leftover_processes(UNIT(s
)) &&
2077 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2078 !s
->kill_context
.send_sigkill
)
2079 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2080 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2085 static void service_enter_start(Service
*s
) {
2093 service_unwatch_control_pid(s
);
2094 service_unwatch_main_pid(s
);
2096 r
= service_adverse_to_leftover_processes(s
);
2100 if (s
->type
== SERVICE_FORKING
) {
2101 s
->control_command_id
= SERVICE_EXEC_START
;
2102 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2104 s
->main_command
= NULL
;
2106 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2107 s
->control_command
= NULL
;
2109 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2113 if (s
->type
!= SERVICE_ONESHOT
) {
2114 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2115 * happen if the configuration changes at runtime. In this case, let's enter a failure
2117 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2122 /* We force a fake state transition here. Otherwise, the unit would go directly from
2123 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2124 * in between. This way we can later trigger actions that depend on the state
2125 * transition, including SuccessAction=. */
2126 service_set_state(s
, SERVICE_START
);
2128 service_enter_start_post(s
);
2132 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2133 /* For simple + idle this is the main process. We don't apply any timeout here, but
2134 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2135 timeout
= USEC_INFINITY
;
2137 timeout
= s
->timeout_start_usec
;
2139 r
= service_spawn(s
,
2142 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2147 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2148 /* For simple services we immediately start
2149 * the START_POST binaries. */
2151 service_set_main_pid(s
, pid
);
2152 service_enter_start_post(s
);
2154 } else if (s
->type
== SERVICE_FORKING
) {
2156 /* For forking services we wait until the start
2157 * process exited. */
2159 s
->control_pid
= pid
;
2160 service_set_state(s
, SERVICE_START
);
2162 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2164 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2166 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2167 * bus. 'notify' and 'exec' services are similar. */
2169 service_set_main_pid(s
, pid
);
2170 service_set_state(s
, SERVICE_START
);
2172 assert_not_reached("Unknown service type");
2177 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2178 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2181 static void service_enter_start_pre(Service
*s
) {
2186 service_unwatch_control_pid(s
);
2188 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2189 if (s
->control_command
) {
2191 r
= service_adverse_to_leftover_processes(s
);
2195 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2197 r
= service_spawn(s
,
2199 s
->timeout_start_usec
,
2200 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2205 service_set_state(s
, SERVICE_START_PRE
);
2207 service_enter_start(s
);
2212 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2213 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2216 static void service_enter_condition(Service
*s
) {
2221 service_unwatch_control_pid(s
);
2223 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2224 if (s
->control_command
) {
2226 r
= service_adverse_to_leftover_processes(s
);
2230 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2232 r
= service_spawn(s
,
2234 s
->timeout_start_usec
,
2235 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2241 service_set_state(s
, SERVICE_CONDITION
);
2243 service_enter_start_pre(s
);
2248 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2249 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2252 static void service_enter_restart(Service
*s
) {
2253 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2258 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2259 /* Don't restart things if we are going down anyway */
2260 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2262 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2269 /* Any units that are bound to this service must also be
2270 * restarted. We use JOB_RESTART (instead of the more obvious
2271 * JOB_START) here so that those dependency jobs will be added
2273 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2277 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2278 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2279 * explicitly however via the usual "systemctl reset-failure" logic. */
2281 s
->flush_n_restarts
= false;
2283 log_struct(LOG_INFO
,
2284 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2285 LOG_UNIT_ID(UNIT(s
)),
2286 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2287 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2288 "N_RESTARTS=%u", s
->n_restarts
);
2290 /* Notify clients about changed restart counter */
2291 unit_add_to_dbus_queue(UNIT(s
));
2293 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2294 * it will be canceled as part of the service_stop() call that
2295 * is executed as part of JOB_RESTART. */
2300 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2301 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2304 static void service_enter_reload_by_notify(Service
*s
) {
2305 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2310 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2311 service_set_state(s
, SERVICE_RELOAD
);
2313 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2314 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2316 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2319 static void service_enter_reload(Service
*s
) {
2324 service_unwatch_control_pid(s
);
2325 s
->reload_result
= SERVICE_SUCCESS
;
2327 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2328 if (s
->control_command
) {
2329 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2331 r
= service_spawn(s
,
2333 s
->timeout_start_usec
,
2334 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2339 service_set_state(s
, SERVICE_RELOAD
);
2341 service_enter_running(s
, SERVICE_SUCCESS
);
2346 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2347 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2348 service_enter_running(s
, SERVICE_SUCCESS
);
2351 static void service_run_next_control(Service
*s
) {
2356 assert(s
->control_command
);
2357 assert(s
->control_command
->command_next
);
2359 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2361 s
->control_command
= s
->control_command
->command_next
;
2362 service_unwatch_control_pid(s
);
2364 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2365 timeout
= s
->timeout_start_usec
;
2367 timeout
= s
->timeout_stop_usec
;
2369 r
= service_spawn(s
,
2372 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2373 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2374 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2375 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2383 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2385 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2386 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2387 else if (s
->state
== SERVICE_STOP_POST
)
2388 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2389 else if (s
->state
== SERVICE_RELOAD
) {
2390 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2391 service_enter_running(s
, SERVICE_SUCCESS
);
2393 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2396 static void service_run_next_main(Service
*s
) {
2401 assert(s
->main_command
);
2402 assert(s
->main_command
->command_next
);
2403 assert(s
->type
== SERVICE_ONESHOT
);
2405 s
->main_command
= s
->main_command
->command_next
;
2406 service_unwatch_main_pid(s
);
2408 r
= service_spawn(s
,
2410 s
->timeout_start_usec
,
2411 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2416 service_set_main_pid(s
, pid
);
2421 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2422 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2425 static int service_start(Unit
*u
) {
2426 Service
*s
= SERVICE(u
);
2431 /* We cannot fulfill this request right now, try again later
2433 if (IN_SET(s
->state
,
2434 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2435 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2438 /* Already on it! */
2439 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2442 /* A service that will be restarted must be stopped first to
2443 * trigger BindsTo and/or OnFailure dependencies. If a user
2444 * does not want to wait for the holdoff time to elapse, the
2445 * service should be manually restarted, not started. We
2446 * simply return EAGAIN here, so that any start jobs stay
2447 * queued, and assume that the auto restart timer will
2448 * eventually trigger the restart. */
2449 if (s
->state
== SERVICE_AUTO_RESTART
)
2452 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2454 /* Make sure we don't enter a busy loop of some kind. */
2455 r
= unit_test_start_limit(u
);
2457 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2461 r
= unit_acquire_invocation_id(u
);
2465 s
->result
= SERVICE_SUCCESS
;
2466 s
->reload_result
= SERVICE_SUCCESS
;
2467 s
->main_pid_known
= false;
2468 s
->main_pid_alien
= false;
2469 s
->forbid_restart
= false;
2471 s
->status_text
= mfree(s
->status_text
);
2472 s
->status_errno
= 0;
2474 s
->notify_state
= NOTIFY_UNKNOWN
;
2476 s
->watchdog_original_usec
= s
->watchdog_usec
;
2477 s
->watchdog_override_enable
= false;
2478 s
->watchdog_override_usec
= USEC_INFINITY
;
2480 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2481 exec_status_reset(&s
->main_exec_status
);
2483 /* This is not an automatic restart? Flush the restart counter then */
2484 if (s
->flush_n_restarts
) {
2486 s
->flush_n_restarts
= false;
2489 u
->reset_accounting
= true;
2491 service_enter_condition(s
);
2495 static int service_stop(Unit
*u
) {
2496 Service
*s
= SERVICE(u
);
2500 /* Don't create restart jobs from manual stops. */
2501 s
->forbid_restart
= true;
2504 if (IN_SET(s
->state
,
2505 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2506 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2509 /* A restart will be scheduled or is in progress. */
2510 if (s
->state
== SERVICE_AUTO_RESTART
) {
2511 service_set_state(s
, SERVICE_DEAD
);
2515 /* If there's already something running we go directly into
2517 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2518 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2522 /* If we are currently cleaning, then abort it, brutally. */
2523 if (s
->state
== SERVICE_CLEANING
) {
2524 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2528 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2530 service_enter_stop(s
, SERVICE_SUCCESS
);
2534 static int service_reload(Unit
*u
) {
2535 Service
*s
= SERVICE(u
);
2539 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2541 service_enter_reload(s
);
2545 _pure_
static bool service_can_reload(Unit
*u
) {
2546 Service
*s
= SERVICE(u
);
2550 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2553 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2554 Service
*s
= SERVICE(u
);
2556 ExecCommand
*first
, *c
;
2560 first
= s
->exec_command
[id
];
2562 /* Figure out where we are in the list by walking back to the beginning */
2563 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2569 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2570 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2571 size_t allocated
= 0, length
= 0;
2572 Service
*s
= SERVICE(u
);
2573 const char *type
, *key
;
2574 ServiceExecCommand id
;
2584 if (command
== s
->control_command
) {
2586 id
= s
->control_command_id
;
2589 id
= SERVICE_EXEC_START
;
2592 idx
= service_exec_command_index(u
, id
, command
);
2594 STRV_FOREACH(arg
, command
->argv
) {
2595 _cleanup_free_
char *e
= NULL
;
2603 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2607 args
[length
++] = ' ';
2609 args
[length
++] = '"';
2610 memcpy(args
+ length
, e
, n
);
2612 args
[length
++] = '"';
2615 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2620 p
= cescape(command
->path
);
2624 key
= strjoina(type
, "-command");
2625 return serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2628 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2629 Service
*s
= SERVICE(u
);
2637 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2638 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2639 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2641 if (s
->control_pid
> 0)
2642 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2644 if (s
->main_pid_known
&& s
->main_pid
> 0)
2645 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2647 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2648 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2649 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2651 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2652 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2654 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2658 service_serialize_exec_command(u
, f
, s
->control_command
);
2659 service_serialize_exec_command(u
, f
, s
->main_command
);
2661 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2664 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2667 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2671 if (s
->exec_fd_event_source
) {
2672 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2676 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2679 if (UNIT_ISSET(s
->accept_socket
)) {
2680 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2685 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2689 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2690 _cleanup_free_
char *c
= NULL
;
2693 copy
= fdset_put_dup(fds
, fs
->fd
);
2695 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2697 c
= cescape(fs
->fdname
);
2701 (void) serialize_item_format(f
, "fd-store-fd", "%i %s", copy
, c
);
2704 if (s
->main_exec_status
.pid
> 0) {
2705 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2706 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2707 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2709 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2710 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2711 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2715 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2716 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2718 if (s
->watchdog_override_enable
)
2719 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2721 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2722 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2727 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2728 Service
*s
= SERVICE(u
);
2730 unsigned idx
= 0, i
;
2731 bool control
, found
= false;
2732 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2733 ExecCommand
*command
= NULL
;
2734 _cleanup_free_
char *path
= NULL
;
2735 _cleanup_strv_free_
char **argv
= NULL
;
2737 enum ExecCommandState
{
2738 STATE_EXEC_COMMAND_TYPE
,
2739 STATE_EXEC_COMMAND_INDEX
,
2740 STATE_EXEC_COMMAND_PATH
,
2741 STATE_EXEC_COMMAND_ARGS
,
2742 _STATE_EXEC_COMMAND_MAX
,
2743 _STATE_EXEC_COMMAND_INVALID
= -1,
2750 control
= streq(key
, "control-command");
2752 state
= STATE_EXEC_COMMAND_TYPE
;
2755 _cleanup_free_
char *arg
= NULL
;
2757 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2764 case STATE_EXEC_COMMAND_TYPE
:
2765 id
= service_exec_command_from_string(arg
);
2769 state
= STATE_EXEC_COMMAND_INDEX
;
2771 case STATE_EXEC_COMMAND_INDEX
:
2772 r
= safe_atou(arg
, &idx
);
2776 state
= STATE_EXEC_COMMAND_PATH
;
2778 case STATE_EXEC_COMMAND_PATH
:
2779 path
= TAKE_PTR(arg
);
2780 state
= STATE_EXEC_COMMAND_ARGS
;
2782 if (!path_is_absolute(path
))
2785 case STATE_EXEC_COMMAND_ARGS
:
2786 r
= strv_extend(&argv
, arg
);
2791 assert_not_reached("Unknown error at deserialization of exec command");
2796 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2799 /* Let's check whether exec command on given offset matches data that we just deserialized */
2800 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2804 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2809 /* Command at the index we serialized is different, let's look for command that exactly
2810 * matches but is on different index. If there is no such command we will not resume execution. */
2811 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2812 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2816 if (command
&& control
)
2817 s
->control_command
= command
;
2819 s
->main_command
= command
;
2821 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2826 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2827 Service
*s
= SERVICE(u
);
2835 if (streq(key
, "state")) {
2838 state
= service_state_from_string(value
);
2840 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2842 s
->deserialized_state
= state
;
2843 } else if (streq(key
, "result")) {
2846 f
= service_result_from_string(value
);
2848 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2849 else if (f
!= SERVICE_SUCCESS
)
2852 } else if (streq(key
, "reload-result")) {
2855 f
= service_result_from_string(value
);
2857 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2858 else if (f
!= SERVICE_SUCCESS
)
2859 s
->reload_result
= f
;
2861 } else if (streq(key
, "control-pid")) {
2864 if (parse_pid(value
, &pid
) < 0)
2865 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2867 s
->control_pid
= pid
;
2868 } else if (streq(key
, "main-pid")) {
2871 if (parse_pid(value
, &pid
) < 0)
2872 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2874 (void) service_set_main_pid(s
, pid
);
2875 } else if (streq(key
, "main-pid-known")) {
2878 b
= parse_boolean(value
);
2880 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2882 s
->main_pid_known
= b
;
2883 } else if (streq(key
, "bus-name-good")) {
2886 b
= parse_boolean(value
);
2888 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2890 s
->bus_name_good
= b
;
2891 } else if (streq(key
, "bus-name-owner")) {
2892 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2894 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2895 } else if (streq(key
, "status-text")) {
2898 r
= cunescape(value
, 0, &t
);
2900 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2902 free_and_replace(s
->status_text
, t
);
2904 } else if (streq(key
, "accept-socket")) {
2907 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2909 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2911 unit_ref_set(&s
->accept_socket
, u
, socket
);
2912 SOCKET(socket
)->n_connections
++;
2915 } else if (streq(key
, "socket-fd")) {
2918 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2919 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2921 asynchronous_close(s
->socket_fd
);
2922 s
->socket_fd
= fdset_remove(fds
, fd
);
2924 } else if (streq(key
, "fd-store-fd")) {
2929 pf
= strcspn(value
, WHITESPACE
);
2930 fdv
= strndupa(value
, pf
);
2932 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2933 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2935 _cleanup_free_
char *t
= NULL
;
2939 fdn
+= strspn(fdn
, WHITESPACE
);
2940 (void) cunescape(fdn
, 0, &t
);
2942 r
= service_add_fd_store(s
, fd
, t
);
2944 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2946 fdset_remove(fds
, fd
);
2949 } else if (streq(key
, "main-exec-status-pid")) {
2952 if (parse_pid(value
, &pid
) < 0)
2953 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2955 s
->main_exec_status
.pid
= pid
;
2956 } else if (streq(key
, "main-exec-status-code")) {
2959 if (safe_atoi(value
, &i
) < 0)
2960 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2962 s
->main_exec_status
.code
= i
;
2963 } else if (streq(key
, "main-exec-status-status")) {
2966 if (safe_atoi(value
, &i
) < 0)
2967 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2969 s
->main_exec_status
.status
= i
;
2970 } else if (streq(key
, "main-exec-status-start"))
2971 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2972 else if (streq(key
, "main-exec-status-exit"))
2973 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2974 else if (streq(key
, "watchdog-timestamp"))
2975 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2976 else if (streq(key
, "forbid-restart")) {
2979 b
= parse_boolean(value
);
2981 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2983 s
->forbid_restart
= b
;
2984 } else if (streq(key
, "stdin-fd")) {
2987 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2988 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2990 asynchronous_close(s
->stdin_fd
);
2991 s
->stdin_fd
= fdset_remove(fds
, fd
);
2992 s
->exec_context
.stdio_as_fds
= true;
2994 } else if (streq(key
, "stdout-fd")) {
2997 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2998 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3000 asynchronous_close(s
->stdout_fd
);
3001 s
->stdout_fd
= fdset_remove(fds
, fd
);
3002 s
->exec_context
.stdio_as_fds
= true;
3004 } else if (streq(key
, "stderr-fd")) {
3007 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3008 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3010 asynchronous_close(s
->stderr_fd
);
3011 s
->stderr_fd
= fdset_remove(fds
, fd
);
3012 s
->exec_context
.stdio_as_fds
= true;
3014 } else if (streq(key
, "exec-fd")) {
3017 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3018 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3020 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3022 fd
= fdset_remove(fds
, fd
);
3023 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3026 } else if (streq(key
, "watchdog-override-usec")) {
3027 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3028 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3030 s
->watchdog_override_enable
= true;
3032 } else if (streq(key
, "watchdog-original-usec")) {
3033 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3034 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3036 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3037 r
= service_deserialize_exec_command(u
, key
, value
);
3039 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3041 } else if (streq(key
, "n-restarts")) {
3042 r
= safe_atou(value
, &s
->n_restarts
);
3044 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3046 } else if (streq(key
, "flush-n-restarts")) {
3047 r
= parse_boolean(value
);
3049 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3051 s
->flush_n_restarts
= r
;
3053 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3058 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3059 const UnitActiveState
*table
;
3063 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3065 return table
[SERVICE(u
)->state
];
3068 static const char *service_sub_state_to_string(Unit
*u
) {
3071 return service_state_to_string(SERVICE(u
)->state
);
3074 static bool service_may_gc(Unit
*u
) {
3075 Service
*s
= SERVICE(u
);
3079 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3080 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3081 * have moved outside of the cgroup. */
3083 if (main_pid_good(s
) > 0 ||
3084 control_pid_good(s
) > 0)
3090 static int service_retry_pid_file(Service
*s
) {
3093 assert(s
->pid_file
);
3094 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3096 r
= service_load_pid_file(s
, false);
3100 service_unwatch_pid_file(s
);
3102 service_enter_running(s
, SERVICE_SUCCESS
);
3106 static int service_watch_pid_file(Service
*s
) {
3109 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3111 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3115 /* the pidfile might have appeared just before we set the watch */
3116 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3117 service_retry_pid_file(s
);
3121 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3122 service_unwatch_pid_file(s
);
3126 static int service_demand_pid_file(Service
*s
) {
3129 assert(s
->pid_file
);
3130 assert(!s
->pid_file_pathspec
);
3132 ps
= new0(PathSpec
, 1);
3137 ps
->path
= strdup(s
->pid_file
);
3143 path_simplify(ps
->path
, false);
3145 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3146 * keep their PID file open all the time. */
3147 ps
->type
= PATH_MODIFIED
;
3148 ps
->inotify_fd
= -1;
3150 s
->pid_file_pathspec
= ps
;
3152 return service_watch_pid_file(s
);
3155 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3156 PathSpec
*p
= userdata
;
3161 s
= SERVICE(p
->unit
);
3165 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3166 assert(s
->pid_file_pathspec
);
3167 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3169 log_unit_debug(UNIT(s
), "inotify event");
3171 if (path_spec_fd_event(p
, events
) < 0)
3174 if (service_retry_pid_file(s
) == 0)
3177 if (service_watch_pid_file(s
) < 0)
3183 service_unwatch_pid_file(s
);
3184 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3188 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3189 Service
*s
= SERVICE(userdata
);
3193 log_unit_debug(UNIT(s
), "got exec-fd event");
3195 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3196 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3197 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3198 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3199 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3200 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3201 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3202 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3208 n
= read(fd
, &x
, sizeof(x
));
3210 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3213 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3215 if (n
== 0) { /* EOF → the event we are waiting for */
3217 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3219 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3220 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3222 s
->exec_fd_hot
= false;
3224 /* Nice! This is what we have been waiting for. Transition to next state. */
3225 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3226 service_enter_start_post(s
);
3228 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3233 /* A byte was read → this turns on/off the exec fd logic */
3234 assert(n
== sizeof(x
));
3241 static void service_notify_cgroup_empty_event(Unit
*u
) {
3242 Service
*s
= SERVICE(u
);
3246 log_unit_debug(u
, "Control group is empty.");
3250 /* Waiting for SIGCHLD is usually more interesting,
3251 * because it includes return codes/signals. Which is
3252 * why we ignore the cgroup events for most cases,
3253 * except when we don't know pid which to expect the
3257 if (s
->type
== SERVICE_NOTIFY
&&
3258 main_pid_good(s
) == 0 &&
3259 control_pid_good(s
) == 0) {
3260 /* No chance of getting a ready notification anymore */
3261 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3266 case SERVICE_START_POST
:
3267 if (s
->pid_file_pathspec
&&
3268 main_pid_good(s
) == 0 &&
3269 control_pid_good(s
) == 0) {
3271 /* Give up hoping for the daemon to write its PID file */
3272 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3274 service_unwatch_pid_file(s
);
3275 if (s
->state
== SERVICE_START
)
3276 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3278 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3282 case SERVICE_RUNNING
:
3283 /* service_enter_running() will figure out what to do */
3284 service_enter_running(s
, SERVICE_SUCCESS
);
3287 case SERVICE_STOP_WATCHDOG
:
3288 case SERVICE_STOP_SIGTERM
:
3289 case SERVICE_STOP_SIGKILL
:
3291 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3292 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3296 case SERVICE_STOP_POST
:
3297 case SERVICE_FINAL_SIGTERM
:
3298 case SERVICE_FINAL_SIGKILL
:
3299 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3300 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3309 static void service_notify_cgroup_oom_event(Unit
*u
) {
3310 Service
*s
= SERVICE(u
);
3312 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3314 if (s
->oom_policy
== OOM_CONTINUE
)
3319 case SERVICE_CONDITION
:
3320 case SERVICE_START_PRE
:
3322 case SERVICE_START_POST
:
3324 if (s
->oom_policy
== OOM_STOP
)
3325 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3326 else if (s
->oom_policy
== OOM_KILL
)
3327 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3331 case SERVICE_EXITED
:
3332 case SERVICE_RUNNING
:
3333 if (s
->oom_policy
== OOM_STOP
)
3334 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3335 else if (s
->oom_policy
== OOM_KILL
)
3336 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3340 case SERVICE_STOP_WATCHDOG
:
3341 case SERVICE_STOP_SIGTERM
:
3342 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3345 case SERVICE_STOP_SIGKILL
:
3346 case SERVICE_FINAL_SIGKILL
:
3347 if (s
->result
== SERVICE_SUCCESS
)
3348 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3351 case SERVICE_STOP_POST
:
3352 case SERVICE_FINAL_SIGTERM
:
3353 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3361 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3362 bool notify_dbus
= true;
3363 Service
*s
= SERVICE(u
);
3365 ExitClean clean_mode
;
3370 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3371 * considered daemons as they are typically not long running. */
3372 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3373 clean_mode
= EXIT_CLEAN_COMMAND
;
3375 clean_mode
= EXIT_CLEAN_DAEMON
;
3377 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3378 f
= SERVICE_SUCCESS
;
3379 else if (code
== CLD_EXITED
)
3380 f
= SERVICE_FAILURE_EXIT_CODE
;
3381 else if (code
== CLD_KILLED
)
3382 f
= SERVICE_FAILURE_SIGNAL
;
3383 else if (code
== CLD_DUMPED
)
3384 f
= SERVICE_FAILURE_CORE_DUMP
;
3386 assert_not_reached("Unknown code");
3388 if (s
->main_pid
== pid
) {
3389 /* Forking services may occasionally move to a new PID.
3390 * As long as they update the PID file before exiting the old
3391 * PID, they're fine. */
3392 if (service_load_pid_file(s
, false) > 0)
3396 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3398 if (s
->main_command
) {
3399 /* If this is not a forking service than the
3400 * main process got started and hence we copy
3401 * the exit status so that it is recorded both
3402 * as main and as control process exit
3405 s
->main_command
->exec_status
= s
->main_exec_status
;
3407 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3408 f
= SERVICE_SUCCESS
;
3409 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3411 /* If this is a forked process, then we should
3412 * ignore the return value if this was
3413 * configured for the starter process */
3415 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3416 f
= SERVICE_SUCCESS
;
3419 unit_log_process_exit(
3422 service_exec_command_to_string(SERVICE_EXEC_START
),
3423 f
== SERVICE_SUCCESS
,
3426 if (s
->result
== SERVICE_SUCCESS
)
3429 if (s
->main_command
&&
3430 s
->main_command
->command_next
&&
3431 s
->type
== SERVICE_ONESHOT
&&
3432 f
== SERVICE_SUCCESS
) {
3434 /* There is another command to *
3435 * execute, so let's do that. */
3437 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3438 service_run_next_main(s
);
3442 /* The service exited, so the service is officially
3444 s
->main_command
= NULL
;
3448 case SERVICE_START_POST
:
3449 case SERVICE_RELOAD
:
3451 /* Need to wait until the operation is
3456 if (s
->type
== SERVICE_ONESHOT
) {
3457 /* This was our main goal, so let's go on */
3458 if (f
== SERVICE_SUCCESS
)
3459 service_enter_start_post(s
);
3461 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3463 } else if (s
->type
== SERVICE_NOTIFY
) {
3464 /* Only enter running through a notification, so that the
3465 * SERVICE_START state signifies that no ready notification
3466 * has been received */
3467 if (f
!= SERVICE_SUCCESS
)
3468 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3469 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3470 /* The service has never been and will never be active */
3471 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3476 case SERVICE_RUNNING
:
3477 service_enter_running(s
, f
);
3480 case SERVICE_STOP_WATCHDOG
:
3481 case SERVICE_STOP_SIGTERM
:
3482 case SERVICE_STOP_SIGKILL
:
3484 if (control_pid_good(s
) <= 0)
3485 service_enter_stop_post(s
, f
);
3487 /* If there is still a control process, wait for that first */
3490 case SERVICE_STOP_POST
:
3491 case SERVICE_FINAL_SIGTERM
:
3492 case SERVICE_FINAL_SIGKILL
:
3494 if (control_pid_good(s
) <= 0)
3495 service_enter_dead(s
, f
, true);
3499 assert_not_reached("Uh, main process died at wrong time.");
3503 } else if (s
->control_pid
== pid
) {
3506 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3507 if (f
== SERVICE_FAILURE_EXIT_CODE
&& s
->state
== SERVICE_CONDITION
&& status
< 255)
3508 f
= SERVICE_SKIP_CONDITION
;
3510 if (s
->control_command
) {
3511 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3513 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3514 f
= SERVICE_SUCCESS
;
3517 unit_log_process_exit(
3520 service_exec_command_to_string(s
->control_command_id
),
3521 f
== SERVICE_SUCCESS
,
3524 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3527 if (s
->control_command
&&
3528 s
->control_command
->command_next
&&
3529 f
== SERVICE_SUCCESS
) {
3531 /* There is another command to *
3532 * execute, so let's do that. */
3534 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3535 service_run_next_control(s
);
3538 /* No further commands for this step, so let's
3539 * figure out what to do next */
3541 s
->control_command
= NULL
;
3542 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3544 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3548 case SERVICE_CONDITION
:
3549 if (f
== SERVICE_SUCCESS
)
3550 service_enter_start_pre(s
);
3552 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3555 case SERVICE_START_PRE
:
3556 if (f
== SERVICE_SUCCESS
)
3557 service_enter_start(s
);
3559 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3563 if (s
->type
!= SERVICE_FORKING
)
3564 /* Maybe spurious event due to a reload that changed the type? */
3567 if (f
!= SERVICE_SUCCESS
) {
3568 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3573 bool has_start_post
;
3576 /* Let's try to load the pid file here if we can.
3577 * The PID file might actually be created by a START_POST
3578 * script. In that case don't worry if the loading fails. */
3580 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3581 r
= service_load_pid_file(s
, !has_start_post
);
3582 if (!has_start_post
&& r
< 0) {
3583 r
= service_demand_pid_file(s
);
3584 if (r
< 0 || cgroup_good(s
) == 0)
3585 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3589 service_search_main_pid(s
);
3591 service_enter_start_post(s
);
3594 case SERVICE_START_POST
:
3595 if (f
!= SERVICE_SUCCESS
) {
3596 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3603 r
= service_load_pid_file(s
, true);
3605 r
= service_demand_pid_file(s
);
3606 if (r
< 0 || cgroup_good(s
) == 0)
3607 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3611 service_search_main_pid(s
);
3613 service_enter_running(s
, SERVICE_SUCCESS
);
3616 case SERVICE_RELOAD
:
3617 if (f
== SERVICE_SUCCESS
)
3618 if (service_load_pid_file(s
, true) < 0)
3619 service_search_main_pid(s
);
3621 s
->reload_result
= f
;
3622 service_enter_running(s
, SERVICE_SUCCESS
);
3626 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3629 case SERVICE_STOP_WATCHDOG
:
3630 case SERVICE_STOP_SIGTERM
:
3631 case SERVICE_STOP_SIGKILL
:
3632 if (main_pid_good(s
) <= 0)
3633 service_enter_stop_post(s
, f
);
3635 /* If there is still a service process around, wait until
3636 * that one quit, too */
3639 case SERVICE_STOP_POST
:
3640 case SERVICE_FINAL_SIGTERM
:
3641 case SERVICE_FINAL_SIGKILL
:
3642 if (main_pid_good(s
) <= 0)
3643 service_enter_dead(s
, f
, true);
3646 case SERVICE_CLEANING
:
3648 if (s
->clean_result
== SERVICE_SUCCESS
)
3649 s
->clean_result
= f
;
3651 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3655 assert_not_reached("Uh, control process died at wrong time.");
3658 } else /* Neither control nor main PID? If so, don't notify about anything */
3659 notify_dbus
= false;
3661 /* Notify clients about changed exit status */
3663 unit_add_to_dbus_queue(u
);
3665 /* We watch the main/control process otherwise we can't retrieve the unit they
3666 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3667 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3668 * detect when the cgroup becomes empty. Note that the control process is always
3669 * our child so it's pointless to watch all other processes. */
3670 if (!control_pid_good(s
))
3671 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3672 (void) unit_enqueue_rewatch_pids(u
);
3675 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3676 Service
*s
= SERVICE(userdata
);
3679 assert(source
== s
->timer_event_source
);
3683 case SERVICE_CONDITION
:
3684 case SERVICE_START_PRE
:
3686 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3687 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3690 case SERVICE_START_POST
:
3691 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3692 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3695 case SERVICE_RUNNING
:
3696 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3697 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3700 case SERVICE_RELOAD
:
3701 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3702 service_kill_control_process(s
);
3703 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3704 service_enter_running(s
, SERVICE_SUCCESS
);
3708 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3709 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3712 case SERVICE_STOP_WATCHDOG
:
3713 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3714 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3717 case SERVICE_STOP_SIGTERM
:
3718 if (s
->kill_context
.send_sigkill
) {
3719 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3720 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3722 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3723 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3728 case SERVICE_STOP_SIGKILL
:
3729 /* Uh, we sent a SIGKILL and it is still not gone?
3730 * Must be something we cannot kill, so let's just be
3731 * weirded out and continue */
3733 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3734 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3737 case SERVICE_STOP_POST
:
3738 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3739 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3742 case SERVICE_FINAL_SIGTERM
:
3743 if (s
->kill_context
.send_sigkill
) {
3744 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3745 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3747 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3748 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3753 case SERVICE_FINAL_SIGKILL
:
3754 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3755 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3758 case SERVICE_AUTO_RESTART
:
3759 if (s
->restart_usec
> 0) {
3760 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3761 log_unit_debug(UNIT(s
),
3762 "Service RestartSec=%s expired, scheduling restart.",
3763 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3765 log_unit_debug(UNIT(s
),
3766 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3768 service_enter_restart(s
);
3771 case SERVICE_CLEANING
:
3772 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3774 if (s
->clean_result
== SERVICE_SUCCESS
)
3775 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3777 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3781 assert_not_reached("Timeout at wrong time.");
3787 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3788 Service
*s
= SERVICE(userdata
);
3789 char t
[FORMAT_TIMESPAN_MAX
];
3790 usec_t watchdog_usec
;
3793 assert(source
== s
->watchdog_event_source
);
3795 watchdog_usec
= service_get_watchdog_usec(s
);
3797 if (UNIT(s
)->manager
->service_watchdogs
) {
3798 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3799 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3801 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3803 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3804 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3809 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3812 if (s
->notify_access
== NOTIFY_NONE
) {
3813 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3817 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3818 if (s
->main_pid
!= 0)
3819 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
);
3821 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
);
3826 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3827 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3828 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
,
3829 pid
, s
->main_pid
, s
->control_pid
);
3830 else if (s
->main_pid
!= 0)
3831 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
);
3832 else if (s
->control_pid
!= 0)
3833 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
);
3835 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
);
3843 static void service_force_watchdog(Service
*s
) {
3844 if (!UNIT(s
)->manager
->service_watchdogs
)
3847 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3848 s
->status_text
? s
->status_text
: "<unset>");
3850 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3853 static void service_notify_message(
3855 const struct ucred
*ucred
,
3859 Service
*s
= SERVICE(u
);
3860 bool notify_dbus
= false;
3868 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3871 if (DEBUG_LOGGING
) {
3872 _cleanup_free_
char *cc
= NULL
;
3874 cc
= strv_join(tags
, ", ");
3875 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3878 /* Interpret MAINPID= */
3879 e
= strv_find_startswith(tags
, "MAINPID=");
3880 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3883 if (parse_pid(e
, &new_main_pid
) < 0)
3884 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3885 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3887 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3889 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
3891 if (ucred
->uid
== 0) {
3892 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
);
3895 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3898 service_set_main_pid(s
, new_main_pid
);
3900 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
3902 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3909 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3910 STRV_FOREACH_BACKWARDS(i
, tags
) {
3912 if (streq(*i
, "READY=1")) {
3913 s
->notify_state
= NOTIFY_READY
;
3915 /* Type=notify services inform us about completed
3916 * initialization with READY=1 */
3917 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3918 service_enter_start_post(s
);
3920 /* Sending READY=1 while we are reloading informs us
3921 * that the reloading is complete */
3922 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3923 service_enter_running(s
, SERVICE_SUCCESS
);
3928 } else if (streq(*i
, "RELOADING=1")) {
3929 s
->notify_state
= NOTIFY_RELOADING
;
3931 if (s
->state
== SERVICE_RUNNING
)
3932 service_enter_reload_by_notify(s
);
3937 } else if (streq(*i
, "STOPPING=1")) {
3938 s
->notify_state
= NOTIFY_STOPPING
;
3940 if (s
->state
== SERVICE_RUNNING
)
3941 service_enter_stop_by_notify(s
);
3948 /* Interpret STATUS= */
3949 e
= strv_find_startswith(tags
, "STATUS=");
3951 _cleanup_free_
char *t
= NULL
;
3954 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3955 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3956 if (strlen(e
) > STATUS_TEXT_MAX
)
3957 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3958 else if (!utf8_is_valid(e
))
3959 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
3967 if (!streq_ptr(s
->status_text
, t
)) {
3968 free_and_replace(s
->status_text
, t
);
3973 /* Interpret ERRNO= */
3974 e
= strv_find_startswith(tags
, "ERRNO=");
3978 status_errno
= parse_errno(e
);
3979 if (status_errno
< 0)
3980 log_unit_warning_errno(u
, status_errno
,
3981 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
3982 else if (s
->status_errno
!= status_errno
) {
3983 s
->status_errno
= status_errno
;
3988 /* Interpret EXTEND_TIMEOUT= */
3989 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3991 usec_t extend_timeout_usec
;
3992 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3993 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3995 service_extend_timeout(s
, extend_timeout_usec
);
3998 /* Interpret WATCHDOG= */
3999 e
= strv_find_startswith(tags
, "WATCHDOG=");
4002 service_reset_watchdog(s
);
4003 else if (streq(e
, "trigger"))
4004 service_force_watchdog(s
);
4006 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4009 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4011 usec_t watchdog_override_usec
;
4012 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4013 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4015 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4018 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4019 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4020 * fds, but optional when pushing in new fds, for compatibility reasons. */
4021 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4024 name
= strv_find_startswith(tags
, "FDNAME=");
4025 if (!name
|| !fdname_is_valid(name
))
4026 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4028 service_remove_fd_store(s
, name
);
4030 } else if (strv_find(tags
, "FDSTORE=1")) {
4033 name
= strv_find_startswith(tags
, "FDNAME=");
4034 if (name
&& !fdname_is_valid(name
)) {
4035 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4039 (void) service_add_fd_store_set(s
, fds
, name
);
4042 /* Notify clients about changed status or main pid */
4044 unit_add_to_dbus_queue(u
);
4047 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4048 Service
*s
= SERVICE(u
);
4052 if (!s
->timer_event_source
)
4055 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4058 if (t
== USEC_INFINITY
)
4065 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4067 Service
*s
= SERVICE(u
);
4073 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4075 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4077 s
->bus_name_good
= !!new_owner
;
4079 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4080 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4082 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4086 if (s
->type
== SERVICE_DBUS
) {
4088 /* service_enter_running() will figure out what to
4090 if (s
->state
== SERVICE_RUNNING
)
4091 service_enter_running(s
, SERVICE_SUCCESS
);
4092 else if (s
->state
== SERVICE_START
&& new_owner
)
4093 service_enter_start_post(s
);
4095 } else if (new_owner
&&
4103 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4106 /* Try to acquire PID from bus service */
4108 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4110 r
= sd_bus_creds_get_pid(creds
, &pid
);
4112 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4114 service_set_main_pid(s
, pid
);
4115 unit_watch_pid(UNIT(s
), pid
, false);
4120 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4121 _cleanup_free_
char *peer
= NULL
;
4127 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4128 * to be configured. We take ownership of the passed fd on success. */
4130 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4133 if (s
->socket_fd
>= 0)
4136 if (s
->state
!= SERVICE_DEAD
)
4139 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4141 if (UNIT(s
)->description
) {
4142 _cleanup_free_
char *a
;
4144 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4148 r
= unit_set_description(UNIT(s
), a
);
4150 r
= unit_set_description(UNIT(s
), peer
);
4156 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4161 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4163 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4167 static void service_reset_failed(Unit
*u
) {
4168 Service
*s
= SERVICE(u
);
4172 if (s
->state
== SERVICE_FAILED
)
4173 service_set_state(s
, SERVICE_DEAD
);
4175 s
->result
= SERVICE_SUCCESS
;
4176 s
->reload_result
= SERVICE_SUCCESS
;
4177 s
->clean_result
= SERVICE_SUCCESS
;
4179 s
->flush_n_restarts
= false;
4182 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4183 Service
*s
= SERVICE(u
);
4187 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4190 static int service_main_pid(Unit
*u
) {
4191 Service
*s
= SERVICE(u
);
4198 static int service_control_pid(Unit
*u
) {
4199 Service
*s
= SERVICE(u
);
4203 return s
->control_pid
;
4206 static bool service_needs_console(Unit
*u
) {
4207 Service
*s
= SERVICE(u
);
4211 /* We provide our own implementation of this here, instead of relying of the generic implementation
4212 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4214 if (!exec_context_may_touch_console(&s
->exec_context
))
4217 return IN_SET(s
->state
,
4225 SERVICE_STOP_WATCHDOG
,
4226 SERVICE_STOP_SIGTERM
,
4227 SERVICE_STOP_SIGKILL
,
4229 SERVICE_FINAL_SIGTERM
,
4230 SERVICE_FINAL_SIGKILL
);
4233 static int service_exit_status(Unit
*u
) {
4234 Service
*s
= SERVICE(u
);
4238 if (s
->main_exec_status
.pid
<= 0 ||
4239 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4242 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4245 return s
->main_exec_status
.status
;
4248 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4249 _cleanup_strv_free_
char **l
= NULL
;
4250 Service
*s
= SERVICE(u
);
4256 if (s
->state
!= SERVICE_DEAD
)
4259 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4263 if (strv_isempty(l
))
4266 service_unwatch_control_pid(s
);
4267 s
->clean_result
= SERVICE_SUCCESS
;
4268 s
->control_command
= NULL
;
4269 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4271 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4275 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4279 service_set_state(s
, SERVICE_CLEANING
);
4284 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4285 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4286 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4290 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4291 Service
*s
= SERVICE(u
);
4295 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4298 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4299 [SERVICE_RESTART_NO
] = "no",
4300 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4301 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4302 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4303 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4304 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4305 [SERVICE_RESTART_ALWAYS
] = "always",
4308 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4310 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4311 [SERVICE_SIMPLE
] = "simple",
4312 [SERVICE_FORKING
] = "forking",
4313 [SERVICE_ONESHOT
] = "oneshot",
4314 [SERVICE_DBUS
] = "dbus",
4315 [SERVICE_NOTIFY
] = "notify",
4316 [SERVICE_IDLE
] = "idle",
4317 [SERVICE_EXEC
] = "exec",
4320 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4322 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4323 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4324 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4325 [SERVICE_EXEC_START
] = "ExecStart",
4326 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4327 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4328 [SERVICE_EXEC_STOP
] = "ExecStop",
4329 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4332 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4334 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4335 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4336 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4337 [SERVICE_EXEC_START
] = "ExecStartEx",
4338 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4339 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4340 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4341 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4344 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4346 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4347 [NOTIFY_UNKNOWN
] = "unknown",
4348 [NOTIFY_READY
] = "ready",
4349 [NOTIFY_RELOADING
] = "reloading",
4350 [NOTIFY_STOPPING
] = "stopping",
4353 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4355 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4356 [SERVICE_SUCCESS
] = "success",
4357 [SERVICE_FAILURE_RESOURCES
] = "resources",
4358 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4359 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4360 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4361 [SERVICE_FAILURE_SIGNAL
] = "signal",
4362 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4363 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4364 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4365 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4366 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4369 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4371 const UnitVTable service_vtable
= {
4372 .object_size
= sizeof(Service
),
4373 .exec_context_offset
= offsetof(Service
, exec_context
),
4374 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4375 .kill_context_offset
= offsetof(Service
, kill_context
),
4376 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4377 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4383 .private_section
= "Service",
4385 .can_transient
= true,
4386 .can_delegate
= true,
4389 .init
= service_init
,
4390 .done
= service_done
,
4391 .load
= service_load
,
4392 .release_resources
= service_release_resources
,
4394 .coldplug
= service_coldplug
,
4396 .dump
= service_dump
,
4398 .start
= service_start
,
4399 .stop
= service_stop
,
4400 .reload
= service_reload
,
4402 .can_reload
= service_can_reload
,
4404 .kill
= service_kill
,
4405 .clean
= service_clean
,
4406 .can_clean
= service_can_clean
,
4408 .serialize
= service_serialize
,
4409 .deserialize_item
= service_deserialize_item
,
4411 .active_state
= service_active_state
,
4412 .sub_state_to_string
= service_sub_state_to_string
,
4414 .will_restart
= service_will_restart
,
4416 .may_gc
= service_may_gc
,
4418 .sigchld_event
= service_sigchld_event
,
4420 .reset_failed
= service_reset_failed
,
4422 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4423 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4424 .notify_message
= service_notify_message
,
4426 .main_pid
= service_main_pid
,
4427 .control_pid
= service_control_pid
,
4429 .bus_name_owner_change
= service_bus_name_owner_change
,
4431 .bus_vtable
= bus_service_vtable
,
4432 .bus_set_property
= bus_service_set_property
,
4433 .bus_commit_properties
= bus_service_commit_properties
,
4435 .get_timeout
= service_get_timeout
,
4436 .needs_console
= service_needs_console
,
4437 .exit_status
= service_exit_status
,
4439 .status_message_formats
= {
4440 .starting_stopping
= {
4441 [0] = "Starting %s...",
4442 [1] = "Stopping %s...",
4444 .finished_start_job
= {
4445 [JOB_DONE
] = "Started %s.",
4446 [JOB_FAILED
] = "Failed to start %s.",
4447 [JOB_SKIPPED
] = "Skipped %s.",
4449 .finished_stop_job
= {
4450 [JOB_DONE
] = "Stopped %s.",
4451 [JOB_FAILED
] = "Stopped (with error) %s.",