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_stdio(Service
*s
) {
656 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
657 * default value that is subject to automatic overriding triggered by other settings and an explicit
658 * choice the user can make. We don't distuingish between these cases currently. */
660 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
661 s
->exec_context
.stdin_data_size
> 0)
662 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
664 if (IN_SET(s
->exec_context
.std_input
,
666 EXEC_INPUT_TTY_FORCE
,
669 EXEC_INPUT_NAMED_FD
))
672 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
673 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
674 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
675 * duplicated for both input and output at the same time (since they then would cause a feedback
676 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
678 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
679 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
680 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
682 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
683 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
686 static int service_setup_bus_name(Service
*s
) {
694 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
696 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
698 /* We always want to be ordered against dbus.socket if both are in the transaction. */
699 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
701 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
703 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
705 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
707 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
712 static int service_add_extras(Service
*s
) {
717 if (s
->type
== _SERVICE_TYPE_INVALID
) {
718 /* Figure out a type automatically */
720 s
->type
= SERVICE_DBUS
;
721 else if (s
->exec_command
[SERVICE_EXEC_START
])
722 s
->type
= SERVICE_SIMPLE
;
724 s
->type
= SERVICE_ONESHOT
;
727 /* Oneshot services have disabled start timeout by default */
728 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
729 s
->timeout_start_usec
= USEC_INFINITY
;
731 service_fix_stdio(s
);
733 r
= unit_patch_contexts(UNIT(s
));
737 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
741 r
= unit_set_default_slice(UNIT(s
));
745 /* If the service needs the notify socket, let's enable it automatically. */
746 if (s
->notify_access
== NOTIFY_NONE
&&
747 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
748 s
->notify_access
= NOTIFY_MAIN
;
750 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
751 * delegation is on, in that case it we assume the payload knows better what to do and can process
752 * things in a more focused way. */
753 if (s
->oom_policy
< 0)
754 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
756 /* Let the kernel do the killing if that's requested. */
757 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
759 r
= service_add_default_dependencies(s
);
763 r
= service_setup_bus_name(s
);
770 static int service_load(Unit
*u
) {
771 Service
*s
= SERVICE(u
);
774 r
= unit_load_fragment_and_dropin(u
, true);
778 if (u
->load_state
!= UNIT_LOADED
)
781 /* This is a new unit? Then let's add in some extras */
782 r
= service_add_extras(s
);
786 return service_verify(s
);
789 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
790 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
],
791 buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
], buf_abort
[FORMAT_TIMESPAN_MAX
];
792 ServiceExecCommand c
;
793 Service
*s
= SERVICE(u
);
798 prefix
= strempty(prefix
);
799 prefix2
= strjoina(prefix
, "\t");
802 "%sService State: %s\n"
804 "%sReload Result: %s\n"
805 "%sClean Result: %s\n"
806 "%sPermissionsStartOnly: %s\n"
807 "%sRootDirectoryStartOnly: %s\n"
808 "%sRemainAfterExit: %s\n"
809 "%sGuessMainPID: %s\n"
812 "%sNotifyAccess: %s\n"
813 "%sNotifyState: %s\n"
815 prefix
, service_state_to_string(s
->state
),
816 prefix
, service_result_to_string(s
->result
),
817 prefix
, service_result_to_string(s
->reload_result
),
818 prefix
, service_result_to_string(s
->clean_result
),
819 prefix
, yes_no(s
->permissions_start_only
),
820 prefix
, yes_no(s
->root_directory_start_only
),
821 prefix
, yes_no(s
->remain_after_exit
),
822 prefix
, yes_no(s
->guess_main_pid
),
823 prefix
, service_type_to_string(s
->type
),
824 prefix
, service_restart_to_string(s
->restart
),
825 prefix
, notify_access_to_string(s
->notify_access
),
826 prefix
, notify_state_to_string(s
->notify_state
),
827 prefix
, oom_policy_to_string(s
->oom_policy
));
829 if (s
->control_pid
> 0)
831 "%sControl PID: "PID_FMT
"\n",
832 prefix
, s
->control_pid
);
836 "%sMain PID: "PID_FMT
"\n"
837 "%sMain PID Known: %s\n"
838 "%sMain PID Alien: %s\n",
840 prefix
, yes_no(s
->main_pid_known
),
841 prefix
, yes_no(s
->main_pid_alien
));
846 prefix
, s
->pid_file
);
851 "%sBus Name Good: %s\n",
853 prefix
, yes_no(s
->bus_name_good
));
855 if (UNIT_ISSET(s
->accept_socket
))
857 "%sAccept Socket: %s\n",
858 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
862 "%sTimeoutStartSec: %s\n"
863 "%sTimeoutStopSec: %s\n",
864 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
865 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
866 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
));
868 if (s
->timeout_abort_set
)
870 "%sTimeoutAbortSec: %s\n",
871 prefix
, format_timespan(buf_abort
, sizeof(buf_abort
), s
->timeout_abort_usec
, USEC_PER_SEC
));
874 "%sRuntimeMaxSec: %s\n"
875 "%sWatchdogSec: %s\n",
876 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
877 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
879 kill_context_dump(&s
->kill_context
, f
, prefix
);
880 exec_context_dump(&s
->exec_context
, f
, prefix
);
882 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
884 if (!s
->exec_command
[c
])
887 fprintf(f
, "%s-> %s:\n",
888 prefix
, service_exec_command_to_string(c
));
890 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
894 fprintf(f
, "%sStatus Text: %s\n",
895 prefix
, s
->status_text
);
897 if (s
->n_fd_store_max
> 0)
899 "%sFile Descriptor Store Max: %u\n"
900 "%sFile Descriptor Store Current: %zu\n",
901 prefix
, s
->n_fd_store_max
,
902 prefix
, s
->n_fd_store
);
904 cgroup_context_dump(UNIT(s
), f
, prefix
);
907 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
911 assert(pid_is_valid(pid
));
913 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
914 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
917 if (pid
== getpid_cached() || pid
== 1) {
918 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
922 if (pid
== s
->control_pid
) {
923 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
927 if (!pid_is_alive(pid
)) {
928 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
932 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
933 if (owner
== UNIT(s
)) {
934 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
935 return 1; /* Yay, it's definitely a good PID */
938 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
941 static int service_load_pid_file(Service
*s
, bool may_warn
) {
942 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
943 bool questionable_pid_file
= false;
944 _cleanup_free_
char *k
= NULL
;
945 _cleanup_close_
int fd
= -1;
954 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
956 r
= chase_symlinks(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
958 log_unit_full(UNIT(s
), LOG_DEBUG
, r
,
959 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
961 questionable_pid_file
= true;
963 r
= chase_symlinks(s
->pid_file
, NULL
, 0, NULL
, &fd
);
966 return log_unit_full(UNIT(s
), prio
, fd
,
967 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
969 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
970 * chase_symlinks() returned us into a proper fd first. */
971 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
972 r
= read_one_line_file(procfs
, &k
);
974 return log_unit_error_errno(UNIT(s
), r
,
975 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
978 r
= parse_pid(k
, &pid
);
980 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
982 if (s
->main_pid_known
&& pid
== s
->main_pid
)
985 r
= service_is_suitable_main_pid(s
, pid
, prio
);
991 if (questionable_pid_file
) {
992 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
996 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
998 if (fstat(fd
, &st
) < 0)
999 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1001 if (st
.st_uid
!= 0) {
1002 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
);
1006 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
);
1009 if (s
->main_pid_known
) {
1010 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1012 service_unwatch_main_pid(s
);
1013 s
->main_pid_known
= false;
1015 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1017 r
= service_set_main_pid(s
, pid
);
1021 r
= unit_watch_pid(UNIT(s
), pid
, false);
1022 if (r
< 0) /* FIXME: we need to do something here */
1023 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1028 static void service_search_main_pid(Service
*s
) {
1034 /* If we know it anyway, don't ever fallback to unreliable
1036 if (s
->main_pid_known
)
1039 if (!s
->guess_main_pid
)
1042 assert(s
->main_pid
<= 0);
1044 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1047 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1048 if (service_set_main_pid(s
, pid
) < 0)
1051 r
= unit_watch_pid(UNIT(s
), pid
, false);
1053 /* FIXME: we need to do something here */
1054 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1057 static void service_set_state(Service
*s
, ServiceState state
) {
1058 ServiceState old_state
;
1059 const UnitActiveState
*table
;
1063 if (s
->state
!= state
)
1064 bus_unit_send_pending_change_signal(UNIT(s
), false);
1066 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1068 old_state
= s
->state
;
1071 service_unwatch_pid_file(s
);
1074 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1077 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1078 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1079 SERVICE_AUTO_RESTART
,
1081 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1084 SERVICE_START
, SERVICE_START_POST
,
1085 SERVICE_RUNNING
, SERVICE_RELOAD
,
1086 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1087 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1088 service_unwatch_main_pid(s
);
1089 s
->main_command
= NULL
;
1093 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1095 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1096 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1097 SERVICE_CLEANING
)) {
1098 service_unwatch_control_pid(s
);
1099 s
->control_command
= NULL
;
1100 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1103 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1104 unit_unwatch_all_pids(UNIT(s
));
1105 unit_dequeue_rewatch_pids(UNIT(s
));
1109 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1110 SERVICE_RUNNING
, SERVICE_RELOAD
,
1111 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1112 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1113 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1114 service_close_socket_fd(s
);
1116 if (state
!= SERVICE_START
)
1117 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1119 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1120 service_stop_watchdog(s
);
1122 /* For the inactive states unit_notify() will trim the cgroup,
1123 * but for exit we have to do that ourselves... */
1124 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1125 unit_prune_cgroup(UNIT(s
));
1127 if (old_state
!= state
)
1128 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1130 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1131 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1132 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0) |
1133 (s
->result
== SERVICE_SKIP_CONDITION
? UNIT_NOTIFY_SKIP_CONDITION
: 0));
1136 static usec_t
service_coldplug_timeout(Service
*s
) {
1139 switch (s
->deserialized_state
) {
1141 case SERVICE_CONDITION
:
1142 case SERVICE_START_PRE
:
1144 case SERVICE_START_POST
:
1145 case SERVICE_RELOAD
:
1146 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1148 case SERVICE_RUNNING
:
1149 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1152 case SERVICE_STOP_SIGTERM
:
1153 case SERVICE_STOP_SIGKILL
:
1154 case SERVICE_STOP_POST
:
1155 case SERVICE_FINAL_SIGTERM
:
1156 case SERVICE_FINAL_SIGKILL
:
1157 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1159 case SERVICE_STOP_WATCHDOG
:
1160 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1162 case SERVICE_AUTO_RESTART
:
1163 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1165 case SERVICE_CLEANING
:
1166 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1169 return USEC_INFINITY
;
1173 static int service_coldplug(Unit
*u
) {
1174 Service
*s
= SERVICE(u
);
1178 assert(s
->state
== SERVICE_DEAD
);
1180 if (s
->deserialized_state
== s
->state
)
1183 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1187 if (s
->main_pid
> 0 &&
1188 pid_is_unwaited(s
->main_pid
) &&
1189 (IN_SET(s
->deserialized_state
,
1190 SERVICE_START
, SERVICE_START_POST
,
1191 SERVICE_RUNNING
, SERVICE_RELOAD
,
1192 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1193 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1194 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1199 if (s
->control_pid
> 0 &&
1200 pid_is_unwaited(s
->control_pid
) &&
1201 IN_SET(s
->deserialized_state
,
1202 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1204 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1205 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1206 SERVICE_CLEANING
)) {
1207 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1212 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1213 (void) unit_enqueue_rewatch_pids(u
);
1214 (void) unit_setup_dynamic_creds(u
);
1215 (void) unit_setup_exec_runtime(u
);
1218 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1219 service_start_watchdog(s
);
1221 if (UNIT_ISSET(s
->accept_socket
)) {
1222 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1224 if (socket
->max_connections_per_source
> 0) {
1227 /* Make a best-effort attempt at bumping the connection count */
1228 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1229 socket_peer_unref(s
->peer
);
1235 service_set_state(s
, s
->deserialized_state
);
1239 static int service_collect_fds(
1243 size_t *n_socket_fds
,
1244 size_t *n_storage_fds
) {
1246 _cleanup_strv_free_
char **rfd_names
= NULL
;
1247 _cleanup_free_
int *rfds
= NULL
;
1248 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1254 assert(n_socket_fds
);
1255 assert(n_storage_fds
);
1257 if (s
->socket_fd
>= 0) {
1259 /* Pass the per-connection socket */
1264 rfds
[0] = s
->socket_fd
;
1266 rfd_names
= strv_new("connection");
1276 /* Pass all our configured sockets for singleton services */
1278 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1279 _cleanup_free_
int *cfds
= NULL
;
1283 if (u
->type
!= UNIT_SOCKET
)
1288 cn_fds
= socket_collect_fds(sock
, &cfds
);
1296 rfds
= TAKE_PTR(cfds
);
1297 rn_socket_fds
= cn_fds
;
1301 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1305 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1308 rn_socket_fds
+= cn_fds
;
1311 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1317 if (s
->n_fd_store
> 0) {
1323 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1329 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1334 n_fds
= rn_socket_fds
;
1336 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1337 rfds
[n_fds
] = fs
->fd
;
1338 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1339 if (!rfd_names
[n_fds
])
1346 rfd_names
[n_fds
] = NULL
;
1349 *fds
= TAKE_PTR(rfds
);
1350 *fd_names
= TAKE_PTR(rfd_names
);
1351 *n_socket_fds
= rn_socket_fds
;
1352 *n_storage_fds
= rn_storage_fds
;
1357 static int service_allocate_exec_fd_event_source(
1360 sd_event_source
**ret_event_source
) {
1362 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1367 assert(ret_event_source
);
1369 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1371 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1373 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1375 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1377 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1379 (void) sd_event_source_set_description(source
, "service event_fd");
1381 r
= sd_event_source_set_io_fd_own(source
, true);
1383 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1385 *ret_event_source
= TAKE_PTR(source
);
1389 static int service_allocate_exec_fd(
1391 sd_event_source
**ret_event_source
,
1394 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1398 assert(ret_event_source
);
1399 assert(ret_exec_fd
);
1401 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1402 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1404 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1409 *ret_exec_fd
= TAKE_FD(p
[1]);
1414 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1417 /* Notifications are accepted depending on the process and
1418 * the access setting of the service:
1419 * process: \ access: NONE MAIN EXEC ALL
1420 * main no yes yes yes
1421 * control no no yes yes
1422 * other (forked) no no no yes */
1424 if (flags
& EXEC_IS_CONTROL
)
1425 /* A control process */
1426 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1428 /* We only spawn main processes and control processes, so any
1429 * process that is not a control process is a main process */
1430 return s
->notify_access
!= NOTIFY_NONE
;
1433 static int service_spawn(
1440 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1447 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1448 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1449 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1450 _cleanup_close_
int exec_fd
= -1;
1451 _cleanup_free_
int *fds
= NULL
;
1459 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1463 if (flags
& EXEC_IS_CONTROL
) {
1464 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1465 if (s
->permissions_start_only
)
1466 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1467 if (s
->root_directory_start_only
)
1468 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1471 if ((flags
& EXEC_PASS_FDS
) ||
1472 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1473 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1474 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1476 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1480 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1483 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1484 assert(!s
->exec_fd_event_source
);
1486 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1491 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1495 our_env
= new0(char*, 10);
1499 if (service_exec_needs_notify_socket(s
, flags
))
1500 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1503 if (s
->main_pid
> 0)
1504 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1507 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1508 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1512 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1515 if (s
->socket_fd
>= 0) {
1516 union sockaddr_union sa
;
1517 socklen_t salen
= sizeof(sa
);
1519 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1520 * useful. Note that we do this only when we are still connected at this point in time, which we might
1521 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1522 * in ENOTCONN), and just use whate we can use. */
1524 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1525 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1527 _cleanup_free_
char *addr
= NULL
;
1531 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1535 t
= strjoin("REMOTE_ADDR=", addr
);
1538 our_env
[n_env
++] = t
;
1540 r
= sockaddr_port(&sa
.sa
, &port
);
1544 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1546 our_env
[n_env
++] = t
;
1550 if (flags
& EXEC_SETENV_RESULT
) {
1551 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1554 if (s
->main_exec_status
.pid
> 0 &&
1555 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1556 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1559 if (s
->main_exec_status
.code
== CLD_EXITED
)
1560 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1562 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1568 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1572 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1576 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1577 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1578 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1580 strv_free_and_replace(exec_params
.environment
, final_env
);
1581 exec_params
.fds
= fds
;
1582 exec_params
.fd_names
= fd_names
;
1583 exec_params
.n_socket_fds
= n_socket_fds
;
1584 exec_params
.n_storage_fds
= n_storage_fds
;
1585 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1586 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1587 if (s
->type
== SERVICE_IDLE
)
1588 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1589 exec_params
.stdin_fd
= s
->stdin_fd
;
1590 exec_params
.stdout_fd
= s
->stdout_fd
;
1591 exec_params
.stderr_fd
= s
->stderr_fd
;
1592 exec_params
.exec_fd
= exec_fd
;
1594 r
= exec_spawn(UNIT(s
),
1604 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1605 s
->exec_fd_hot
= false;
1607 r
= unit_watch_pid(UNIT(s
), pid
, true);
1616 static int main_pid_good(Service
*s
) {
1619 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1621 /* If we know the pid file, then let's just check if it is
1623 if (s
->main_pid_known
) {
1625 /* If it's an alien child let's check if it is still
1627 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1628 return pid_is_alive(s
->main_pid
);
1630 /* .. otherwise assume we'll get a SIGCHLD for it,
1631 * which we really should wait for to collect exit
1632 * status and code */
1633 return s
->main_pid
> 0;
1636 /* We don't know the pid */
1640 static int control_pid_good(Service
*s
) {
1643 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1644 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1645 * means: we can't figure it out. */
1647 return s
->control_pid
> 0;
1650 static int cgroup_good(Service
*s
) {
1655 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1658 if (!UNIT(s
)->cgroup_path
)
1661 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1668 static bool service_shall_restart(Service
*s
, const char **reason
) {
1671 /* Don't restart after manual stops */
1672 if (s
->forbid_restart
) {
1673 *reason
= "manual stop";
1677 /* Never restart if this is configured as special exception */
1678 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1679 *reason
= "prevented by exit status";
1683 /* Restart if the exit code/status are configured as restart triggers */
1684 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1685 *reason
= "forced by exit status";
1689 *reason
= "restart setting";
1690 switch (s
->restart
) {
1692 case SERVICE_RESTART_NO
:
1695 case SERVICE_RESTART_ALWAYS
:
1698 case SERVICE_RESTART_ON_SUCCESS
:
1699 return s
->result
== SERVICE_SUCCESS
;
1701 case SERVICE_RESTART_ON_FAILURE
:
1702 return s
->result
!= SERVICE_SUCCESS
;
1704 case SERVICE_RESTART_ON_ABNORMAL
:
1705 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1707 case SERVICE_RESTART_ON_WATCHDOG
:
1708 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1710 case SERVICE_RESTART_ON_ABORT
:
1711 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1714 assert_not_reached("unknown restart setting");
1718 static bool service_will_restart(Unit
*u
) {
1719 Service
*s
= SERVICE(u
);
1723 if (s
->will_auto_restart
)
1725 if (s
->state
== SERVICE_AUTO_RESTART
)
1728 return unit_will_restart_default(u
);
1731 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1732 ServiceState end_state
;
1737 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1738 * undo what has already been enqueued. */
1739 if (unit_stop_pending(UNIT(s
)))
1740 allow_restart
= false;
1742 if (s
->result
== SERVICE_SUCCESS
)
1745 if (s
->result
== SERVICE_SUCCESS
) {
1746 unit_log_success(UNIT(s
));
1747 end_state
= SERVICE_DEAD
;
1748 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1749 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1750 end_state
= SERVICE_DEAD
;
1752 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1753 end_state
= SERVICE_FAILED
;
1757 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1762 shall_restart
= service_shall_restart(s
, &reason
);
1763 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1764 shall_restart
? "" : "not ",
1767 s
->will_auto_restart
= true;
1770 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1771 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1772 s
->n_keep_fd_store
++;
1774 service_set_state(s
, end_state
);
1776 if (s
->will_auto_restart
) {
1777 s
->will_auto_restart
= false;
1779 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1781 s
->n_keep_fd_store
--;
1785 service_set_state(s
, SERVICE_AUTO_RESTART
);
1787 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1788 * user can still introspect the counter. Do so on the next start. */
1789 s
->flush_n_restarts
= true;
1791 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1792 * queue, so that the fd store is possibly gc'ed again */
1793 s
->n_keep_fd_store
--;
1794 unit_add_to_gc_queue(UNIT(s
));
1796 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1797 s
->forbid_restart
= false;
1799 /* We want fresh tmpdirs in case service is started again immediately */
1800 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1802 /* Also, remove the runtime directory */
1803 unit_destroy_runtime_directory(UNIT(s
), &s
->exec_context
);
1805 /* Get rid of the IPC bits of the user */
1806 unit_unref_uid_gid(UNIT(s
), true);
1808 /* Release the user, and destroy it if we are the only remaining owner */
1809 dynamic_creds_destroy(&s
->dynamic_creds
);
1811 /* Try to delete the pid file. At this point it will be
1812 * out-of-date, and some software might be confused by it, so
1813 * let's remove it. */
1815 (void) unlink(s
->pid_file
);
1817 /* Reset TTY ownership if necessary */
1818 exec_context_revert_tty(&s
->exec_context
);
1823 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1824 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1827 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1831 if (s
->result
== SERVICE_SUCCESS
)
1834 service_unwatch_control_pid(s
);
1835 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1837 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1838 if (s
->control_command
) {
1839 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1841 r
= service_spawn(s
,
1843 s
->timeout_stop_usec
,
1844 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1849 service_set_state(s
, SERVICE_STOP_POST
);
1851 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1856 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1857 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1860 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1863 case SERVICE_STOP_WATCHDOG
:
1864 return KILL_WATCHDOG
;
1866 case SERVICE_STOP_SIGTERM
:
1867 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1868 return KILL_RESTART
;
1871 case SERVICE_FINAL_SIGTERM
:
1872 return KILL_TERMINATE
;
1874 case SERVICE_STOP_SIGKILL
:
1875 case SERVICE_FINAL_SIGKILL
:
1879 return _KILL_OPERATION_INVALID
;
1883 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1888 if (s
->result
== SERVICE_SUCCESS
)
1891 /* Before sending any signal, make sure we track all members of this cgroup */
1892 (void) unit_watch_all_pids(UNIT(s
));
1894 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1896 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1898 r
= unit_kill_context(
1901 state_to_kill_operation(s
, state
),
1909 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1910 state
== SERVICE_STOP_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1914 service_set_state(s
, state
);
1915 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1916 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1917 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1918 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1919 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1920 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1922 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1927 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1929 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1930 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1932 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1935 static void service_enter_stop_by_notify(Service
*s
) {
1938 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1940 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1942 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1943 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1946 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1951 if (s
->result
== SERVICE_SUCCESS
)
1954 service_unwatch_control_pid(s
);
1955 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1957 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1958 if (s
->control_command
) {
1959 s
->control_command_id
= SERVICE_EXEC_STOP
;
1961 r
= service_spawn(s
,
1963 s
->timeout_stop_usec
,
1964 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1969 service_set_state(s
, SERVICE_STOP
);
1971 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1976 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1977 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1980 static bool service_good(Service
*s
) {
1984 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1987 main_pid_ok
= main_pid_good(s
);
1988 if (main_pid_ok
> 0) /* It's alive */
1990 if (main_pid_ok
== 0) /* It's dead */
1993 /* OK, we don't know anything about the main PID, maybe
1994 * because there is none. Let's check the control group
1997 return cgroup_good(s
) != 0;
2000 static void service_enter_running(Service
*s
, ServiceResult f
) {
2003 if (s
->result
== SERVICE_SUCCESS
)
2006 service_unwatch_control_pid(s
);
2008 if (s
->result
!= SERVICE_SUCCESS
)
2009 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2010 else if (service_good(s
)) {
2012 /* If there are any queued up sd_notify() notifications, process them now */
2013 if (s
->notify_state
== NOTIFY_RELOADING
)
2014 service_enter_reload_by_notify(s
);
2015 else if (s
->notify_state
== NOTIFY_STOPPING
)
2016 service_enter_stop_by_notify(s
);
2018 service_set_state(s
, SERVICE_RUNNING
);
2019 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2022 } else if (s
->remain_after_exit
)
2023 service_set_state(s
, SERVICE_EXITED
);
2025 service_enter_stop(s
, SERVICE_SUCCESS
);
2028 static void service_enter_start_post(Service
*s
) {
2032 service_unwatch_control_pid(s
);
2033 service_reset_watchdog(s
);
2035 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2036 if (s
->control_command
) {
2037 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2039 r
= service_spawn(s
,
2041 s
->timeout_start_usec
,
2042 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2047 service_set_state(s
, SERVICE_START_POST
);
2049 service_enter_running(s
, SERVICE_SUCCESS
);
2054 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2055 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2058 static void service_kill_control_process(Service
*s
) {
2063 if (s
->control_pid
<= 0)
2066 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2068 _cleanup_free_
char *comm
= NULL
;
2070 (void) get_process_comm(s
->control_pid
, &comm
);
2072 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2073 s
->control_pid
, strna(comm
));
2077 static int service_adverse_to_leftover_processes(Service
*s
) {
2080 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2081 * SendSIGKILL is used for services that require a clean shutdown. These are typically database
2082 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or
2083 * startup time is quite variable (so Timeout settings aren't of use).
2085 * Here we take these two factors and refuse to start a service if there are existing processes
2086 * within a control group. Databases, while generally having some protection against multiple
2087 * instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service
2088 * aren't as rigoriously written to protect aganst against multiple use. */
2089 if (unit_warn_leftover_processes(UNIT(s
)) &&
2090 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2091 !s
->kill_context
.send_sigkill
)
2092 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2093 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2098 static void service_enter_start(Service
*s
) {
2106 service_unwatch_control_pid(s
);
2107 service_unwatch_main_pid(s
);
2109 r
= service_adverse_to_leftover_processes(s
);
2113 if (s
->type
== SERVICE_FORKING
) {
2114 s
->control_command_id
= SERVICE_EXEC_START
;
2115 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2117 s
->main_command
= NULL
;
2119 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2120 s
->control_command
= NULL
;
2122 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2126 if (s
->type
!= SERVICE_ONESHOT
) {
2127 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2128 * happen if the configuration changes at runtime. In this case, let's enter a failure
2130 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2135 /* We force a fake state transition here. Otherwise, the unit would go directly from
2136 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2137 * in between. This way we can later trigger actions that depend on the state
2138 * transition, including SuccessAction=. */
2139 service_set_state(s
, SERVICE_START
);
2141 service_enter_start_post(s
);
2145 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2146 /* For simple + idle this is the main process. We don't apply any timeout here, but
2147 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2148 timeout
= USEC_INFINITY
;
2150 timeout
= s
->timeout_start_usec
;
2152 r
= service_spawn(s
,
2155 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2160 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2161 /* For simple services we immediately start
2162 * the START_POST binaries. */
2164 service_set_main_pid(s
, pid
);
2165 service_enter_start_post(s
);
2167 } else if (s
->type
== SERVICE_FORKING
) {
2169 /* For forking services we wait until the start
2170 * process exited. */
2172 s
->control_pid
= pid
;
2173 service_set_state(s
, SERVICE_START
);
2175 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2177 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2179 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2180 * bus. 'notify' and 'exec' services are similar. */
2182 service_set_main_pid(s
, pid
);
2183 service_set_state(s
, SERVICE_START
);
2185 assert_not_reached("Unknown service type");
2190 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2191 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2194 static void service_enter_start_pre(Service
*s
) {
2199 service_unwatch_control_pid(s
);
2201 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2202 if (s
->control_command
) {
2204 r
= service_adverse_to_leftover_processes(s
);
2208 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2210 r
= service_spawn(s
,
2212 s
->timeout_start_usec
,
2213 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2218 service_set_state(s
, SERVICE_START_PRE
);
2220 service_enter_start(s
);
2225 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2226 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2229 static void service_enter_condition(Service
*s
) {
2234 service_unwatch_control_pid(s
);
2236 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2237 if (s
->control_command
) {
2239 r
= service_adverse_to_leftover_processes(s
);
2243 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2245 r
= service_spawn(s
,
2247 s
->timeout_start_usec
,
2248 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2254 service_set_state(s
, SERVICE_CONDITION
);
2256 service_enter_start_pre(s
);
2261 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2262 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2265 static void service_enter_restart(Service
*s
) {
2266 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2271 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2272 /* Don't restart things if we are going down anyway */
2273 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2275 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2282 /* Any units that are bound to this service must also be
2283 * restarted. We use JOB_RESTART (instead of the more obvious
2284 * JOB_START) here so that those dependency jobs will be added
2286 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2290 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2291 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2292 * explicitly however via the usual "systemctl reset-failure" logic. */
2294 s
->flush_n_restarts
= false;
2296 log_struct(LOG_INFO
,
2297 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2298 LOG_UNIT_ID(UNIT(s
)),
2299 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2300 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2301 "N_RESTARTS=%u", s
->n_restarts
);
2303 /* Notify clients about changed restart counter */
2304 unit_add_to_dbus_queue(UNIT(s
));
2306 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2307 * it will be canceled as part of the service_stop() call that
2308 * is executed as part of JOB_RESTART. */
2313 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2314 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2317 static void service_enter_reload_by_notify(Service
*s
) {
2318 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2323 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2324 service_set_state(s
, SERVICE_RELOAD
);
2326 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2327 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2329 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2332 static void service_enter_reload(Service
*s
) {
2337 service_unwatch_control_pid(s
);
2338 s
->reload_result
= SERVICE_SUCCESS
;
2340 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2341 if (s
->control_command
) {
2342 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2344 r
= service_spawn(s
,
2346 s
->timeout_start_usec
,
2347 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2352 service_set_state(s
, SERVICE_RELOAD
);
2354 service_enter_running(s
, SERVICE_SUCCESS
);
2359 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2360 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2361 service_enter_running(s
, SERVICE_SUCCESS
);
2364 static void service_run_next_control(Service
*s
) {
2369 assert(s
->control_command
);
2370 assert(s
->control_command
->command_next
);
2372 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2374 s
->control_command
= s
->control_command
->command_next
;
2375 service_unwatch_control_pid(s
);
2377 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2378 timeout
= s
->timeout_start_usec
;
2380 timeout
= s
->timeout_stop_usec
;
2382 r
= service_spawn(s
,
2385 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2386 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2387 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2388 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2396 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2398 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2399 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2400 else if (s
->state
== SERVICE_STOP_POST
)
2401 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2402 else if (s
->state
== SERVICE_RELOAD
) {
2403 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2404 service_enter_running(s
, SERVICE_SUCCESS
);
2406 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2409 static void service_run_next_main(Service
*s
) {
2414 assert(s
->main_command
);
2415 assert(s
->main_command
->command_next
);
2416 assert(s
->type
== SERVICE_ONESHOT
);
2418 s
->main_command
= s
->main_command
->command_next
;
2419 service_unwatch_main_pid(s
);
2421 r
= service_spawn(s
,
2423 s
->timeout_start_usec
,
2424 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2429 service_set_main_pid(s
, pid
);
2434 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2435 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2438 static int service_start(Unit
*u
) {
2439 Service
*s
= SERVICE(u
);
2444 /* We cannot fulfill this request right now, try again later
2446 if (IN_SET(s
->state
,
2447 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2448 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2451 /* Already on it! */
2452 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2455 /* A service that will be restarted must be stopped first to
2456 * trigger BindsTo and/or OnFailure dependencies. If a user
2457 * does not want to wait for the holdoff time to elapse, the
2458 * service should be manually restarted, not started. We
2459 * simply return EAGAIN here, so that any start jobs stay
2460 * queued, and assume that the auto restart timer will
2461 * eventually trigger the restart. */
2462 if (s
->state
== SERVICE_AUTO_RESTART
)
2465 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2467 /* Make sure we don't enter a busy loop of some kind. */
2468 r
= unit_test_start_limit(u
);
2470 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2474 r
= unit_acquire_invocation_id(u
);
2478 s
->result
= SERVICE_SUCCESS
;
2479 s
->reload_result
= SERVICE_SUCCESS
;
2480 s
->main_pid_known
= false;
2481 s
->main_pid_alien
= false;
2482 s
->forbid_restart
= false;
2484 s
->status_text
= mfree(s
->status_text
);
2485 s
->status_errno
= 0;
2487 s
->notify_state
= NOTIFY_UNKNOWN
;
2489 s
->watchdog_original_usec
= s
->watchdog_usec
;
2490 s
->watchdog_override_enable
= false;
2491 s
->watchdog_override_usec
= USEC_INFINITY
;
2493 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2494 exec_status_reset(&s
->main_exec_status
);
2496 /* This is not an automatic restart? Flush the restart counter then */
2497 if (s
->flush_n_restarts
) {
2499 s
->flush_n_restarts
= false;
2502 u
->reset_accounting
= true;
2504 service_enter_condition(s
);
2508 static int service_stop(Unit
*u
) {
2509 Service
*s
= SERVICE(u
);
2513 /* Don't create restart jobs from manual stops. */
2514 s
->forbid_restart
= true;
2517 if (IN_SET(s
->state
,
2518 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2519 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2522 /* A restart will be scheduled or is in progress. */
2523 if (s
->state
== SERVICE_AUTO_RESTART
) {
2524 service_set_state(s
, SERVICE_DEAD
);
2528 /* If there's already something running we go directly into
2530 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2531 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2535 /* If we are currently cleaning, then abort it, brutally. */
2536 if (s
->state
== SERVICE_CLEANING
) {
2537 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2541 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2543 service_enter_stop(s
, SERVICE_SUCCESS
);
2547 static int service_reload(Unit
*u
) {
2548 Service
*s
= SERVICE(u
);
2552 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2554 service_enter_reload(s
);
2558 _pure_
static bool service_can_reload(Unit
*u
) {
2559 Service
*s
= SERVICE(u
);
2563 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2566 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2567 Service
*s
= SERVICE(u
);
2569 ExecCommand
*first
, *c
;
2573 first
= s
->exec_command
[id
];
2575 /* Figure out where we are in the list by walking back to the beginning */
2576 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2582 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2583 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2584 size_t allocated
= 0, length
= 0;
2585 Service
*s
= SERVICE(u
);
2586 const char *type
, *key
;
2587 ServiceExecCommand id
;
2597 if (command
== s
->control_command
) {
2599 id
= s
->control_command_id
;
2602 id
= SERVICE_EXEC_START
;
2605 idx
= service_exec_command_index(u
, id
, command
);
2607 STRV_FOREACH(arg
, command
->argv
) {
2608 _cleanup_free_
char *e
= NULL
;
2616 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2620 args
[length
++] = ' ';
2622 args
[length
++] = '"';
2623 memcpy(args
+ length
, e
, n
);
2625 args
[length
++] = '"';
2628 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2633 p
= cescape(command
->path
);
2637 key
= strjoina(type
, "-command");
2638 return serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2641 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2642 Service
*s
= SERVICE(u
);
2650 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2651 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2652 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2654 if (s
->control_pid
> 0)
2655 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2657 if (s
->main_pid_known
&& s
->main_pid
> 0)
2658 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2660 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2661 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2662 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2664 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2665 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2667 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2671 service_serialize_exec_command(u
, f
, s
->control_command
);
2672 service_serialize_exec_command(u
, f
, s
->main_command
);
2674 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2677 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2680 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2684 if (s
->exec_fd_event_source
) {
2685 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2689 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2692 if (UNIT_ISSET(s
->accept_socket
)) {
2693 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2698 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2702 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2703 _cleanup_free_
char *c
= NULL
;
2706 copy
= fdset_put_dup(fds
, fs
->fd
);
2708 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2710 c
= cescape(fs
->fdname
);
2714 (void) serialize_item_format(f
, "fd-store-fd", "%i %s", copy
, c
);
2717 if (s
->main_exec_status
.pid
> 0) {
2718 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2719 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2720 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2722 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2723 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2724 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2728 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2729 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2731 if (s
->watchdog_override_enable
)
2732 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2734 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2735 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2740 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2741 Service
*s
= SERVICE(u
);
2743 unsigned idx
= 0, i
;
2744 bool control
, found
= false;
2745 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2746 ExecCommand
*command
= NULL
;
2747 _cleanup_free_
char *path
= NULL
;
2748 _cleanup_strv_free_
char **argv
= NULL
;
2750 enum ExecCommandState
{
2751 STATE_EXEC_COMMAND_TYPE
,
2752 STATE_EXEC_COMMAND_INDEX
,
2753 STATE_EXEC_COMMAND_PATH
,
2754 STATE_EXEC_COMMAND_ARGS
,
2755 _STATE_EXEC_COMMAND_MAX
,
2756 _STATE_EXEC_COMMAND_INVALID
= -1,
2763 control
= streq(key
, "control-command");
2765 state
= STATE_EXEC_COMMAND_TYPE
;
2768 _cleanup_free_
char *arg
= NULL
;
2770 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2777 case STATE_EXEC_COMMAND_TYPE
:
2778 id
= service_exec_command_from_string(arg
);
2782 state
= STATE_EXEC_COMMAND_INDEX
;
2784 case STATE_EXEC_COMMAND_INDEX
:
2785 r
= safe_atou(arg
, &idx
);
2789 state
= STATE_EXEC_COMMAND_PATH
;
2791 case STATE_EXEC_COMMAND_PATH
:
2792 path
= TAKE_PTR(arg
);
2793 state
= STATE_EXEC_COMMAND_ARGS
;
2795 if (!path_is_absolute(path
))
2798 case STATE_EXEC_COMMAND_ARGS
:
2799 r
= strv_extend(&argv
, arg
);
2804 assert_not_reached("Unknown error at deserialization of exec command");
2809 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2812 /* Let's check whether exec command on given offset matches data that we just deserialized */
2813 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2817 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2822 /* Command at the index we serialized is different, let's look for command that exactly
2823 * matches but is on different index. If there is no such command we will not resume execution. */
2824 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2825 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2829 if (command
&& control
)
2830 s
->control_command
= command
;
2832 s
->main_command
= command
;
2834 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2839 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2840 Service
*s
= SERVICE(u
);
2848 if (streq(key
, "state")) {
2851 state
= service_state_from_string(value
);
2853 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2855 s
->deserialized_state
= state
;
2856 } else if (streq(key
, "result")) {
2859 f
= service_result_from_string(value
);
2861 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2862 else if (f
!= SERVICE_SUCCESS
)
2865 } else if (streq(key
, "reload-result")) {
2868 f
= service_result_from_string(value
);
2870 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2871 else if (f
!= SERVICE_SUCCESS
)
2872 s
->reload_result
= f
;
2874 } else if (streq(key
, "control-pid")) {
2877 if (parse_pid(value
, &pid
) < 0)
2878 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2880 s
->control_pid
= pid
;
2881 } else if (streq(key
, "main-pid")) {
2884 if (parse_pid(value
, &pid
) < 0)
2885 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2887 (void) service_set_main_pid(s
, pid
);
2888 } else if (streq(key
, "main-pid-known")) {
2891 b
= parse_boolean(value
);
2893 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2895 s
->main_pid_known
= b
;
2896 } else if (streq(key
, "bus-name-good")) {
2899 b
= parse_boolean(value
);
2901 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2903 s
->bus_name_good
= b
;
2904 } else if (streq(key
, "bus-name-owner")) {
2905 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2907 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2908 } else if (streq(key
, "status-text")) {
2911 r
= cunescape(value
, 0, &t
);
2913 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2915 free_and_replace(s
->status_text
, t
);
2917 } else if (streq(key
, "accept-socket")) {
2920 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2922 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2924 unit_ref_set(&s
->accept_socket
, u
, socket
);
2925 SOCKET(socket
)->n_connections
++;
2928 } else if (streq(key
, "socket-fd")) {
2931 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2932 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2934 asynchronous_close(s
->socket_fd
);
2935 s
->socket_fd
= fdset_remove(fds
, fd
);
2937 } else if (streq(key
, "fd-store-fd")) {
2942 pf
= strcspn(value
, WHITESPACE
);
2943 fdv
= strndupa(value
, pf
);
2945 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2946 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2948 _cleanup_free_
char *t
= NULL
;
2952 fdn
+= strspn(fdn
, WHITESPACE
);
2953 (void) cunescape(fdn
, 0, &t
);
2955 r
= service_add_fd_store(s
, fd
, t
);
2957 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2959 fdset_remove(fds
, fd
);
2962 } else if (streq(key
, "main-exec-status-pid")) {
2965 if (parse_pid(value
, &pid
) < 0)
2966 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2968 s
->main_exec_status
.pid
= pid
;
2969 } else if (streq(key
, "main-exec-status-code")) {
2972 if (safe_atoi(value
, &i
) < 0)
2973 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2975 s
->main_exec_status
.code
= i
;
2976 } else if (streq(key
, "main-exec-status-status")) {
2979 if (safe_atoi(value
, &i
) < 0)
2980 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2982 s
->main_exec_status
.status
= i
;
2983 } else if (streq(key
, "main-exec-status-start"))
2984 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2985 else if (streq(key
, "main-exec-status-exit"))
2986 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2987 else if (streq(key
, "watchdog-timestamp"))
2988 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2989 else if (streq(key
, "forbid-restart")) {
2992 b
= parse_boolean(value
);
2994 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2996 s
->forbid_restart
= b
;
2997 } else if (streq(key
, "stdin-fd")) {
3000 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3001 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3003 asynchronous_close(s
->stdin_fd
);
3004 s
->stdin_fd
= fdset_remove(fds
, fd
);
3005 s
->exec_context
.stdio_as_fds
= true;
3007 } else if (streq(key
, "stdout-fd")) {
3010 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3011 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3013 asynchronous_close(s
->stdout_fd
);
3014 s
->stdout_fd
= fdset_remove(fds
, fd
);
3015 s
->exec_context
.stdio_as_fds
= true;
3017 } else if (streq(key
, "stderr-fd")) {
3020 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3021 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3023 asynchronous_close(s
->stderr_fd
);
3024 s
->stderr_fd
= fdset_remove(fds
, fd
);
3025 s
->exec_context
.stdio_as_fds
= true;
3027 } else if (streq(key
, "exec-fd")) {
3030 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3031 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3033 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3035 fd
= fdset_remove(fds
, fd
);
3036 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3039 } else if (streq(key
, "watchdog-override-usec")) {
3040 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3041 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3043 s
->watchdog_override_enable
= true;
3045 } else if (streq(key
, "watchdog-original-usec")) {
3046 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3047 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3049 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3050 r
= service_deserialize_exec_command(u
, key
, value
);
3052 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3054 } else if (streq(key
, "n-restarts")) {
3055 r
= safe_atou(value
, &s
->n_restarts
);
3057 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3059 } else if (streq(key
, "flush-n-restarts")) {
3060 r
= parse_boolean(value
);
3062 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3064 s
->flush_n_restarts
= r
;
3066 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3071 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3072 const UnitActiveState
*table
;
3076 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3078 return table
[SERVICE(u
)->state
];
3081 static const char *service_sub_state_to_string(Unit
*u
) {
3084 return service_state_to_string(SERVICE(u
)->state
);
3087 static bool service_may_gc(Unit
*u
) {
3088 Service
*s
= SERVICE(u
);
3092 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3093 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3094 * have moved outside of the cgroup. */
3096 if (main_pid_good(s
) > 0 ||
3097 control_pid_good(s
) > 0)
3103 static int service_retry_pid_file(Service
*s
) {
3106 assert(s
->pid_file
);
3107 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3109 r
= service_load_pid_file(s
, false);
3113 service_unwatch_pid_file(s
);
3115 service_enter_running(s
, SERVICE_SUCCESS
);
3119 static int service_watch_pid_file(Service
*s
) {
3122 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3124 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3128 /* the pidfile might have appeared just before we set the watch */
3129 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3130 service_retry_pid_file(s
);
3134 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3135 service_unwatch_pid_file(s
);
3139 static int service_demand_pid_file(Service
*s
) {
3142 assert(s
->pid_file
);
3143 assert(!s
->pid_file_pathspec
);
3145 ps
= new0(PathSpec
, 1);
3150 ps
->path
= strdup(s
->pid_file
);
3156 path_simplify(ps
->path
, false);
3158 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3159 * keep their PID file open all the time. */
3160 ps
->type
= PATH_MODIFIED
;
3161 ps
->inotify_fd
= -1;
3163 s
->pid_file_pathspec
= ps
;
3165 return service_watch_pid_file(s
);
3168 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3169 PathSpec
*p
= userdata
;
3174 s
= SERVICE(p
->unit
);
3178 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3179 assert(s
->pid_file_pathspec
);
3180 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3182 log_unit_debug(UNIT(s
), "inotify event");
3184 if (path_spec_fd_event(p
, events
) < 0)
3187 if (service_retry_pid_file(s
) == 0)
3190 if (service_watch_pid_file(s
) < 0)
3196 service_unwatch_pid_file(s
);
3197 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3201 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3202 Service
*s
= SERVICE(userdata
);
3206 log_unit_debug(UNIT(s
), "got exec-fd event");
3208 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3209 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3210 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3211 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3212 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3213 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3214 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3215 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3221 n
= read(fd
, &x
, sizeof(x
));
3223 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3226 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3228 if (n
== 0) { /* EOF → the event we are waiting for */
3230 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3232 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3233 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3235 s
->exec_fd_hot
= false;
3237 /* Nice! This is what we have been waiting for. Transition to next state. */
3238 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3239 service_enter_start_post(s
);
3241 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3246 /* A byte was read → this turns on/off the exec fd logic */
3247 assert(n
== sizeof(x
));
3254 static void service_notify_cgroup_empty_event(Unit
*u
) {
3255 Service
*s
= SERVICE(u
);
3259 log_unit_debug(u
, "Control group is empty.");
3263 /* Waiting for SIGCHLD is usually more interesting,
3264 * because it includes return codes/signals. Which is
3265 * why we ignore the cgroup events for most cases,
3266 * except when we don't know pid which to expect the
3270 if (s
->type
== SERVICE_NOTIFY
&&
3271 main_pid_good(s
) == 0 &&
3272 control_pid_good(s
) == 0) {
3273 /* No chance of getting a ready notification anymore */
3274 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3279 case SERVICE_START_POST
:
3280 if (s
->pid_file_pathspec
&&
3281 main_pid_good(s
) == 0 &&
3282 control_pid_good(s
) == 0) {
3284 /* Give up hoping for the daemon to write its PID file */
3285 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3287 service_unwatch_pid_file(s
);
3288 if (s
->state
== SERVICE_START
)
3289 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3291 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3295 case SERVICE_RUNNING
:
3296 /* service_enter_running() will figure out what to do */
3297 service_enter_running(s
, SERVICE_SUCCESS
);
3300 case SERVICE_STOP_WATCHDOG
:
3301 case SERVICE_STOP_SIGTERM
:
3302 case SERVICE_STOP_SIGKILL
:
3304 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3305 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3309 case SERVICE_STOP_POST
:
3310 case SERVICE_FINAL_SIGTERM
:
3311 case SERVICE_FINAL_SIGKILL
:
3312 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3313 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3322 static void service_notify_cgroup_oom_event(Unit
*u
) {
3323 Service
*s
= SERVICE(u
);
3325 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3327 if (s
->oom_policy
== OOM_CONTINUE
)
3332 case SERVICE_CONDITION
:
3333 case SERVICE_START_PRE
:
3335 case SERVICE_START_POST
:
3337 if (s
->oom_policy
== OOM_STOP
)
3338 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3339 else if (s
->oom_policy
== OOM_KILL
)
3340 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3344 case SERVICE_EXITED
:
3345 case SERVICE_RUNNING
:
3346 if (s
->oom_policy
== OOM_STOP
)
3347 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3348 else if (s
->oom_policy
== OOM_KILL
)
3349 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3353 case SERVICE_STOP_WATCHDOG
:
3354 case SERVICE_STOP_SIGTERM
:
3355 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3358 case SERVICE_STOP_SIGKILL
:
3359 case SERVICE_FINAL_SIGKILL
:
3360 if (s
->result
== SERVICE_SUCCESS
)
3361 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3364 case SERVICE_STOP_POST
:
3365 case SERVICE_FINAL_SIGTERM
:
3366 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3374 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3375 bool notify_dbus
= true;
3376 Service
*s
= SERVICE(u
);
3378 ExitClean clean_mode
;
3383 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3384 * considered daemons as they are typically not long running. */
3385 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3386 clean_mode
= EXIT_CLEAN_COMMAND
;
3388 clean_mode
= EXIT_CLEAN_DAEMON
;
3390 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3391 f
= SERVICE_SUCCESS
;
3392 else if (code
== CLD_EXITED
)
3393 f
= SERVICE_FAILURE_EXIT_CODE
;
3394 else if (code
== CLD_KILLED
)
3395 f
= SERVICE_FAILURE_SIGNAL
;
3396 else if (code
== CLD_DUMPED
)
3397 f
= SERVICE_FAILURE_CORE_DUMP
;
3399 assert_not_reached("Unknown code");
3401 if (s
->main_pid
== pid
) {
3402 /* Forking services may occasionally move to a new PID.
3403 * As long as they update the PID file before exiting the old
3404 * PID, they're fine. */
3405 if (service_load_pid_file(s
, false) > 0)
3409 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3411 if (s
->main_command
) {
3412 /* If this is not a forking service than the
3413 * main process got started and hence we copy
3414 * the exit status so that it is recorded both
3415 * as main and as control process exit
3418 s
->main_command
->exec_status
= s
->main_exec_status
;
3420 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3421 f
= SERVICE_SUCCESS
;
3422 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3424 /* If this is a forked process, then we should
3425 * ignore the return value if this was
3426 * configured for the starter process */
3428 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3429 f
= SERVICE_SUCCESS
;
3432 unit_log_process_exit(
3435 service_exec_command_to_string(SERVICE_EXEC_START
),
3436 f
== SERVICE_SUCCESS
,
3439 if (s
->result
== SERVICE_SUCCESS
)
3442 if (s
->main_command
&&
3443 s
->main_command
->command_next
&&
3444 s
->type
== SERVICE_ONESHOT
&&
3445 f
== SERVICE_SUCCESS
) {
3447 /* There is another command to *
3448 * execute, so let's do that. */
3450 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3451 service_run_next_main(s
);
3455 /* The service exited, so the service is officially
3457 s
->main_command
= NULL
;
3461 case SERVICE_START_POST
:
3462 case SERVICE_RELOAD
:
3464 /* Need to wait until the operation is
3469 if (s
->type
== SERVICE_ONESHOT
) {
3470 /* This was our main goal, so let's go on */
3471 if (f
== SERVICE_SUCCESS
)
3472 service_enter_start_post(s
);
3474 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3476 } else if (s
->type
== SERVICE_NOTIFY
) {
3477 /* Only enter running through a notification, so that the
3478 * SERVICE_START state signifies that no ready notification
3479 * has been received */
3480 if (f
!= SERVICE_SUCCESS
)
3481 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3482 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3483 /* The service has never been and will never be active */
3484 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3489 case SERVICE_RUNNING
:
3490 service_enter_running(s
, f
);
3493 case SERVICE_STOP_WATCHDOG
:
3494 case SERVICE_STOP_SIGTERM
:
3495 case SERVICE_STOP_SIGKILL
:
3497 if (control_pid_good(s
) <= 0)
3498 service_enter_stop_post(s
, f
);
3500 /* If there is still a control process, wait for that first */
3503 case SERVICE_STOP_POST
:
3504 case SERVICE_FINAL_SIGTERM
:
3505 case SERVICE_FINAL_SIGKILL
:
3507 if (control_pid_good(s
) <= 0)
3508 service_enter_dead(s
, f
, true);
3512 assert_not_reached("Uh, main process died at wrong time.");
3516 } else if (s
->control_pid
== pid
) {
3519 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3520 if (f
== SERVICE_FAILURE_EXIT_CODE
&& s
->state
== SERVICE_CONDITION
&& status
< 255)
3521 f
= SERVICE_SKIP_CONDITION
;
3523 if (s
->control_command
) {
3524 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3526 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3527 f
= SERVICE_SUCCESS
;
3530 unit_log_process_exit(
3533 service_exec_command_to_string(s
->control_command_id
),
3534 f
== SERVICE_SUCCESS
,
3537 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3540 if (s
->control_command
&&
3541 s
->control_command
->command_next
&&
3542 f
== SERVICE_SUCCESS
) {
3544 /* There is another command to *
3545 * execute, so let's do that. */
3547 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3548 service_run_next_control(s
);
3551 /* No further commands for this step, so let's
3552 * figure out what to do next */
3554 s
->control_command
= NULL
;
3555 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3557 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3561 case SERVICE_CONDITION
:
3562 if (f
== SERVICE_SUCCESS
)
3563 service_enter_start_pre(s
);
3565 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3568 case SERVICE_START_PRE
:
3569 if (f
== SERVICE_SUCCESS
)
3570 service_enter_start(s
);
3572 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3576 if (s
->type
!= SERVICE_FORKING
)
3577 /* Maybe spurious event due to a reload that changed the type? */
3580 if (f
!= SERVICE_SUCCESS
) {
3581 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3586 bool has_start_post
;
3589 /* Let's try to load the pid file here if we can.
3590 * The PID file might actually be created by a START_POST
3591 * script. In that case don't worry if the loading fails. */
3593 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3594 r
= service_load_pid_file(s
, !has_start_post
);
3595 if (!has_start_post
&& r
< 0) {
3596 r
= service_demand_pid_file(s
);
3597 if (r
< 0 || cgroup_good(s
) == 0)
3598 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3602 service_search_main_pid(s
);
3604 service_enter_start_post(s
);
3607 case SERVICE_START_POST
:
3608 if (f
!= SERVICE_SUCCESS
) {
3609 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3616 r
= service_load_pid_file(s
, true);
3618 r
= service_demand_pid_file(s
);
3619 if (r
< 0 || cgroup_good(s
) == 0)
3620 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3624 service_search_main_pid(s
);
3626 service_enter_running(s
, SERVICE_SUCCESS
);
3629 case SERVICE_RELOAD
:
3630 if (f
== SERVICE_SUCCESS
)
3631 if (service_load_pid_file(s
, true) < 0)
3632 service_search_main_pid(s
);
3634 s
->reload_result
= f
;
3635 service_enter_running(s
, SERVICE_SUCCESS
);
3639 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3642 case SERVICE_STOP_WATCHDOG
:
3643 case SERVICE_STOP_SIGTERM
:
3644 case SERVICE_STOP_SIGKILL
:
3645 if (main_pid_good(s
) <= 0)
3646 service_enter_stop_post(s
, f
);
3648 /* If there is still a service process around, wait until
3649 * that one quit, too */
3652 case SERVICE_STOP_POST
:
3653 case SERVICE_FINAL_SIGTERM
:
3654 case SERVICE_FINAL_SIGKILL
:
3655 if (main_pid_good(s
) <= 0)
3656 service_enter_dead(s
, f
, true);
3659 case SERVICE_CLEANING
:
3661 if (s
->clean_result
== SERVICE_SUCCESS
)
3662 s
->clean_result
= f
;
3664 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3668 assert_not_reached("Uh, control process died at wrong time.");
3671 } else /* Neither control nor main PID? If so, don't notify about anything */
3672 notify_dbus
= false;
3674 /* Notify clients about changed exit status */
3676 unit_add_to_dbus_queue(u
);
3678 /* We watch the main/control process otherwise we can't retrieve the unit they
3679 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3680 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3681 * detect when the cgroup becomes empty. Note that the control process is always
3682 * our child so it's pointless to watch all other processes. */
3683 if (!control_pid_good(s
))
3684 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3685 (void) unit_enqueue_rewatch_pids(u
);
3688 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3689 Service
*s
= SERVICE(userdata
);
3692 assert(source
== s
->timer_event_source
);
3696 case SERVICE_CONDITION
:
3697 case SERVICE_START_PRE
:
3699 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3700 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3703 case SERVICE_START_POST
:
3704 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3705 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3708 case SERVICE_RUNNING
:
3709 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3710 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3713 case SERVICE_RELOAD
:
3714 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3715 service_kill_control_process(s
);
3716 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3717 service_enter_running(s
, SERVICE_SUCCESS
);
3721 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3722 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3725 case SERVICE_STOP_WATCHDOG
:
3726 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3727 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3730 case SERVICE_STOP_SIGTERM
:
3731 if (s
->kill_context
.send_sigkill
) {
3732 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3733 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3735 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3736 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3741 case SERVICE_STOP_SIGKILL
:
3742 /* Uh, we sent a SIGKILL and it is still not gone?
3743 * Must be something we cannot kill, so let's just be
3744 * weirded out and continue */
3746 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3747 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3750 case SERVICE_STOP_POST
:
3751 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3752 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3755 case SERVICE_FINAL_SIGTERM
:
3756 if (s
->kill_context
.send_sigkill
) {
3757 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3758 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3760 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3761 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3766 case SERVICE_FINAL_SIGKILL
:
3767 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3768 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3771 case SERVICE_AUTO_RESTART
:
3772 if (s
->restart_usec
> 0) {
3773 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3774 log_unit_debug(UNIT(s
),
3775 "Service RestartSec=%s expired, scheduling restart.",
3776 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3778 log_unit_debug(UNIT(s
),
3779 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3781 service_enter_restart(s
);
3784 case SERVICE_CLEANING
:
3785 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3787 if (s
->clean_result
== SERVICE_SUCCESS
)
3788 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3790 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3794 assert_not_reached("Timeout at wrong time.");
3800 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3801 Service
*s
= SERVICE(userdata
);
3802 char t
[FORMAT_TIMESPAN_MAX
];
3803 usec_t watchdog_usec
;
3806 assert(source
== s
->watchdog_event_source
);
3808 watchdog_usec
= service_get_watchdog_usec(s
);
3810 if (UNIT(s
)->manager
->service_watchdogs
) {
3811 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3812 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3814 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3816 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3817 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3822 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3825 if (s
->notify_access
== NOTIFY_NONE
) {
3826 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3830 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3831 if (s
->main_pid
!= 0)
3832 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
);
3834 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
);
3839 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3840 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3841 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
,
3842 pid
, s
->main_pid
, s
->control_pid
);
3843 else if (s
->main_pid
!= 0)
3844 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
);
3845 else if (s
->control_pid
!= 0)
3846 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
);
3848 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
);
3856 static void service_force_watchdog(Service
*s
) {
3857 if (!UNIT(s
)->manager
->service_watchdogs
)
3860 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3861 s
->status_text
? s
->status_text
: "<unset>");
3863 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3866 static void service_notify_message(
3868 const struct ucred
*ucred
,
3872 Service
*s
= SERVICE(u
);
3873 bool notify_dbus
= false;
3881 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3884 if (DEBUG_LOGGING
) {
3885 _cleanup_free_
char *cc
= NULL
;
3887 cc
= strv_join(tags
, ", ");
3888 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3891 /* Interpret MAINPID= */
3892 e
= strv_find_startswith(tags
, "MAINPID=");
3893 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3896 if (parse_pid(e
, &new_main_pid
) < 0)
3897 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3898 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3900 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3902 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
3904 if (ucred
->uid
== 0) {
3905 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
);
3908 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3911 service_set_main_pid(s
, new_main_pid
);
3913 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
3915 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3922 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3923 STRV_FOREACH_BACKWARDS(i
, tags
) {
3925 if (streq(*i
, "READY=1")) {
3926 s
->notify_state
= NOTIFY_READY
;
3928 /* Type=notify services inform us about completed
3929 * initialization with READY=1 */
3930 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3931 service_enter_start_post(s
);
3933 /* Sending READY=1 while we are reloading informs us
3934 * that the reloading is complete */
3935 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3936 service_enter_running(s
, SERVICE_SUCCESS
);
3941 } else if (streq(*i
, "RELOADING=1")) {
3942 s
->notify_state
= NOTIFY_RELOADING
;
3944 if (s
->state
== SERVICE_RUNNING
)
3945 service_enter_reload_by_notify(s
);
3950 } else if (streq(*i
, "STOPPING=1")) {
3951 s
->notify_state
= NOTIFY_STOPPING
;
3953 if (s
->state
== SERVICE_RUNNING
)
3954 service_enter_stop_by_notify(s
);
3961 /* Interpret STATUS= */
3962 e
= strv_find_startswith(tags
, "STATUS=");
3964 _cleanup_free_
char *t
= NULL
;
3967 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3968 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3969 if (strlen(e
) > STATUS_TEXT_MAX
)
3970 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3971 else if (!utf8_is_valid(e
))
3972 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
3980 if (!streq_ptr(s
->status_text
, t
)) {
3981 free_and_replace(s
->status_text
, t
);
3986 /* Interpret ERRNO= */
3987 e
= strv_find_startswith(tags
, "ERRNO=");
3991 status_errno
= parse_errno(e
);
3992 if (status_errno
< 0)
3993 log_unit_warning_errno(u
, status_errno
,
3994 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
3995 else if (s
->status_errno
!= status_errno
) {
3996 s
->status_errno
= status_errno
;
4001 /* Interpret EXTEND_TIMEOUT= */
4002 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4004 usec_t extend_timeout_usec
;
4005 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4006 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4008 service_extend_timeout(s
, extend_timeout_usec
);
4011 /* Interpret WATCHDOG= */
4012 e
= strv_find_startswith(tags
, "WATCHDOG=");
4015 service_reset_watchdog(s
);
4016 else if (streq(e
, "trigger"))
4017 service_force_watchdog(s
);
4019 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4022 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4024 usec_t watchdog_override_usec
;
4025 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4026 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4028 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4031 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4032 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4033 * fds, but optional when pushing in new fds, for compatibility reasons. */
4034 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4037 name
= strv_find_startswith(tags
, "FDNAME=");
4038 if (!name
|| !fdname_is_valid(name
))
4039 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4041 service_remove_fd_store(s
, name
);
4043 } else if (strv_find(tags
, "FDSTORE=1")) {
4046 name
= strv_find_startswith(tags
, "FDNAME=");
4047 if (name
&& !fdname_is_valid(name
)) {
4048 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4052 (void) service_add_fd_store_set(s
, fds
, name
);
4055 /* Notify clients about changed status or main pid */
4057 unit_add_to_dbus_queue(u
);
4060 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4061 Service
*s
= SERVICE(u
);
4065 if (!s
->timer_event_source
)
4068 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4071 if (t
== USEC_INFINITY
)
4078 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4080 Service
*s
= SERVICE(u
);
4086 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4088 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4090 s
->bus_name_good
= !!new_owner
;
4092 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4093 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4095 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4099 if (s
->type
== SERVICE_DBUS
) {
4101 /* service_enter_running() will figure out what to
4103 if (s
->state
== SERVICE_RUNNING
)
4104 service_enter_running(s
, SERVICE_SUCCESS
);
4105 else if (s
->state
== SERVICE_START
&& new_owner
)
4106 service_enter_start_post(s
);
4108 } else if (new_owner
&&
4116 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4119 /* Try to acquire PID from bus service */
4121 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4123 r
= sd_bus_creds_get_pid(creds
, &pid
);
4125 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4127 service_set_main_pid(s
, pid
);
4128 unit_watch_pid(UNIT(s
), pid
, false);
4133 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4134 _cleanup_free_
char *peer
= NULL
;
4140 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4141 * to be configured. We take ownership of the passed fd on success. */
4143 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4146 if (s
->socket_fd
>= 0)
4149 if (s
->state
!= SERVICE_DEAD
)
4152 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4154 if (UNIT(s
)->description
) {
4155 _cleanup_free_
char *a
;
4157 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4161 r
= unit_set_description(UNIT(s
), a
);
4163 r
= unit_set_description(UNIT(s
), peer
);
4169 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4174 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4176 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4180 static void service_reset_failed(Unit
*u
) {
4181 Service
*s
= SERVICE(u
);
4185 if (s
->state
== SERVICE_FAILED
)
4186 service_set_state(s
, SERVICE_DEAD
);
4188 s
->result
= SERVICE_SUCCESS
;
4189 s
->reload_result
= SERVICE_SUCCESS
;
4190 s
->clean_result
= SERVICE_SUCCESS
;
4192 s
->flush_n_restarts
= false;
4195 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4196 Service
*s
= SERVICE(u
);
4200 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4203 static int service_main_pid(Unit
*u
) {
4204 Service
*s
= SERVICE(u
);
4211 static int service_control_pid(Unit
*u
) {
4212 Service
*s
= SERVICE(u
);
4216 return s
->control_pid
;
4219 static bool service_needs_console(Unit
*u
) {
4220 Service
*s
= SERVICE(u
);
4224 /* We provide our own implementation of this here, instead of relying of the generic implementation
4225 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4227 if (!exec_context_may_touch_console(&s
->exec_context
))
4230 return IN_SET(s
->state
,
4238 SERVICE_STOP_WATCHDOG
,
4239 SERVICE_STOP_SIGTERM
,
4240 SERVICE_STOP_SIGKILL
,
4242 SERVICE_FINAL_SIGTERM
,
4243 SERVICE_FINAL_SIGKILL
);
4246 static int service_exit_status(Unit
*u
) {
4247 Service
*s
= SERVICE(u
);
4251 if (s
->main_exec_status
.pid
<= 0 ||
4252 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4255 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4258 return s
->main_exec_status
.status
;
4261 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4262 _cleanup_strv_free_
char **l
= NULL
;
4263 Service
*s
= SERVICE(u
);
4269 if (s
->state
!= SERVICE_DEAD
)
4272 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4276 if (strv_isempty(l
))
4279 service_unwatch_control_pid(s
);
4280 s
->clean_result
= SERVICE_SUCCESS
;
4281 s
->control_command
= NULL
;
4282 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4284 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4288 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4292 service_set_state(s
, SERVICE_CLEANING
);
4297 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4298 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4299 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4303 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4304 Service
*s
= SERVICE(u
);
4308 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4311 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4312 if (t
== JOB_START
&& result
== JOB_DONE
) {
4313 Service
*s
= SERVICE(u
);
4315 if (s
->type
== SERVICE_ONESHOT
)
4316 return "Finished %s.";
4319 /* Fall back to generic */
4323 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4324 [SERVICE_RESTART_NO
] = "no",
4325 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4326 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4327 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4328 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4329 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4330 [SERVICE_RESTART_ALWAYS
] = "always",
4333 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4335 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4336 [SERVICE_SIMPLE
] = "simple",
4337 [SERVICE_FORKING
] = "forking",
4338 [SERVICE_ONESHOT
] = "oneshot",
4339 [SERVICE_DBUS
] = "dbus",
4340 [SERVICE_NOTIFY
] = "notify",
4341 [SERVICE_IDLE
] = "idle",
4342 [SERVICE_EXEC
] = "exec",
4345 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4347 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4348 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4349 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4350 [SERVICE_EXEC_START
] = "ExecStart",
4351 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4352 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4353 [SERVICE_EXEC_STOP
] = "ExecStop",
4354 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4357 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4359 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4360 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4361 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4362 [SERVICE_EXEC_START
] = "ExecStartEx",
4363 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4364 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4365 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4366 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4369 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4371 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4372 [NOTIFY_UNKNOWN
] = "unknown",
4373 [NOTIFY_READY
] = "ready",
4374 [NOTIFY_RELOADING
] = "reloading",
4375 [NOTIFY_STOPPING
] = "stopping",
4378 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4380 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4381 [SERVICE_SUCCESS
] = "success",
4382 [SERVICE_FAILURE_RESOURCES
] = "resources",
4383 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4384 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4385 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4386 [SERVICE_FAILURE_SIGNAL
] = "signal",
4387 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4388 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4389 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4390 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4391 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4394 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4396 const UnitVTable service_vtable
= {
4397 .object_size
= sizeof(Service
),
4398 .exec_context_offset
= offsetof(Service
, exec_context
),
4399 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4400 .kill_context_offset
= offsetof(Service
, kill_context
),
4401 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4402 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4408 .private_section
= "Service",
4410 .can_transient
= true,
4411 .can_delegate
= true,
4414 .init
= service_init
,
4415 .done
= service_done
,
4416 .load
= service_load
,
4417 .release_resources
= service_release_resources
,
4419 .coldplug
= service_coldplug
,
4421 .dump
= service_dump
,
4423 .start
= service_start
,
4424 .stop
= service_stop
,
4425 .reload
= service_reload
,
4427 .can_reload
= service_can_reload
,
4429 .kill
= service_kill
,
4430 .clean
= service_clean
,
4431 .can_clean
= service_can_clean
,
4433 .serialize
= service_serialize
,
4434 .deserialize_item
= service_deserialize_item
,
4436 .active_state
= service_active_state
,
4437 .sub_state_to_string
= service_sub_state_to_string
,
4439 .will_restart
= service_will_restart
,
4441 .may_gc
= service_may_gc
,
4443 .sigchld_event
= service_sigchld_event
,
4445 .reset_failed
= service_reset_failed
,
4447 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4448 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4449 .notify_message
= service_notify_message
,
4451 .main_pid
= service_main_pid
,
4452 .control_pid
= service_control_pid
,
4454 .bus_name_owner_change
= service_bus_name_owner_change
,
4456 .bus_vtable
= bus_service_vtable
,
4457 .bus_set_property
= bus_service_set_property
,
4458 .bus_commit_properties
= bus_service_commit_properties
,
4460 .get_timeout
= service_get_timeout
,
4461 .needs_console
= service_needs_console
,
4462 .exit_status
= service_exit_status
,
4464 .status_message_formats
= {
4465 .starting_stopping
= {
4466 [0] = "Starting %s...",
4467 [1] = "Stopping %s...",
4469 .finished_start_job
= {
4470 [JOB_FAILED
] = "Failed to start %s.",
4471 [JOB_SKIPPED
] = "Skipped %s.",
4473 .finished_stop_job
= {
4474 [JOB_DONE
] = "Stopped %s.",
4475 [JOB_FAILED
] = "Stopped (with error) %s.",
4477 .finished_job
= service_finished_job
,