1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "sd-messages.h"
11 #include "alloc-util.h"
13 #include "bus-error.h"
14 #include "bus-kernel.h"
16 #include "dbus-service.h"
17 #include "dbus-unit.h"
21 #include "exit-status.h"
24 #include "format-util.h"
26 #include "load-dropin.h"
27 #include "load-fragment.h"
30 #include "parse-util.h"
31 #include "path-util.h"
32 #include "process-util.h"
34 #include "serialize.h"
36 #include "signal-util.h"
38 #include "stdio-util.h"
39 #include "string-table.h"
40 #include "string-util.h"
42 #include "unit-name.h"
47 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
48 [SERVICE_DEAD
] = UNIT_INACTIVE
,
49 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
50 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
51 [SERVICE_START
] = UNIT_ACTIVATING
,
52 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
53 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
54 [SERVICE_EXITED
] = UNIT_ACTIVE
,
55 [SERVICE_RELOAD
] = UNIT_RELOADING
,
56 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
59 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
60 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
61 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
62 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
63 [SERVICE_FAILED
] = UNIT_FAILED
,
64 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
65 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
68 /* For Type=idle we never want to delay any other jobs, hence we
69 * consider idle jobs active as soon as we start working on them */
70 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
71 [SERVICE_DEAD
] = UNIT_INACTIVE
,
72 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
73 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
74 [SERVICE_START
] = UNIT_ACTIVE
,
75 [SERVICE_START_POST
] = UNIT_ACTIVE
,
76 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
77 [SERVICE_EXITED
] = UNIT_ACTIVE
,
78 [SERVICE_RELOAD
] = UNIT_RELOADING
,
79 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
80 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
81 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
82 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
83 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
84 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
85 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
86 [SERVICE_FAILED
] = UNIT_FAILED
,
87 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
88 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
91 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
92 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
93 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
94 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
96 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
97 static void service_enter_reload_by_notify(Service
*s
);
99 static void service_init(Unit
*u
) {
100 Service
*s
= SERVICE(u
);
103 assert(u
->load_state
== UNIT_STUB
);
105 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
106 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
107 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
108 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
109 s
->restart_usec
= u
->manager
->default_restart_usec
;
110 s
->runtime_max_usec
= USEC_INFINITY
;
111 s
->timeout_clean_usec
= USEC_INFINITY
;
112 s
->type
= _SERVICE_TYPE_INVALID
;
114 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
115 s
->guess_main_pid
= true;
117 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
119 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
120 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
122 s
->watchdog_original_usec
= USEC_INFINITY
;
124 s
->oom_policy
= _OOM_POLICY_INVALID
;
127 static void service_unwatch_control_pid(Service
*s
) {
130 if (s
->control_pid
<= 0)
133 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
137 static void service_unwatch_main_pid(Service
*s
) {
140 if (s
->main_pid
<= 0)
143 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
147 static void service_unwatch_pid_file(Service
*s
) {
148 if (!s
->pid_file_pathspec
)
151 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
152 path_spec_unwatch(s
->pid_file_pathspec
);
153 path_spec_done(s
->pid_file_pathspec
);
154 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
157 static int service_set_main_pid(Service
*s
, pid_t pid
) {
163 if (pid
== getpid_cached())
166 if (s
->main_pid
== pid
&& s
->main_pid_known
)
169 if (s
->main_pid
!= pid
) {
170 service_unwatch_main_pid(s
);
171 exec_status_start(&s
->main_exec_status
, pid
);
175 s
->main_pid_known
= true;
176 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
178 if (s
->main_pid_alien
)
179 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
184 void service_close_socket_fd(Service
*s
) {
187 /* Undo the effect of service_set_socket_fd(). */
189 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
191 if (UNIT_ISSET(s
->accept_socket
)) {
192 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
193 unit_ref_unset(&s
->accept_socket
);
197 static void service_stop_watchdog(Service
*s
) {
200 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
201 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
204 static usec_t
service_get_watchdog_usec(Service
*s
) {
207 if (s
->watchdog_override_enable
)
208 return s
->watchdog_override_usec
;
210 return s
->watchdog_original_usec
;
213 static void service_start_watchdog(Service
*s
) {
214 usec_t watchdog_usec
;
219 watchdog_usec
= service_get_watchdog_usec(s
);
220 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
221 service_stop_watchdog(s
);
225 if (s
->watchdog_event_source
) {
226 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
228 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
232 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
234 r
= sd_event_add_time(
235 UNIT(s
)->manager
->event
,
236 &s
->watchdog_event_source
,
238 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
239 service_dispatch_watchdog
, s
);
241 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
245 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
247 /* Let's process everything else which might be a sign
248 * of living before we consider a service died. */
249 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
252 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
255 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
261 /* Extends the specified event source timer to at least the specified time, unless it is already later
267 r
= sd_event_source_get_time(source
, ¤t
);
270 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
271 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
275 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
278 r
= sd_event_source_set_time(source
, extended
);
281 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
282 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
286 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
291 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
294 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
296 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
297 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
300 static void service_reset_watchdog(Service
*s
) {
303 dual_timestamp_get(&s
->watchdog_timestamp
);
304 service_start_watchdog(s
);
307 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
310 s
->watchdog_override_enable
= true;
311 s
->watchdog_override_usec
= watchdog_override_usec
;
312 service_reset_watchdog(s
);
314 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
315 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
318 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
324 assert(fs
->service
->n_fd_store
> 0);
325 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
326 fs
->service
->n_fd_store
--;
329 sd_event_source_disable_unref(fs
->event_source
);
336 static void service_release_fd_store(Service
*s
) {
339 if (s
->n_keep_fd_store
> 0)
342 log_unit_debug(UNIT(s
), "Releasing all stored fds");
344 service_fd_store_unlink(s
->fd_store
);
346 assert(s
->n_fd_store
== 0);
349 static void service_release_resources(Unit
*u
) {
350 Service
*s
= SERVICE(u
);
354 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
357 log_unit_debug(u
, "Releasing resources.");
359 s
->stdin_fd
= safe_close(s
->stdin_fd
);
360 s
->stdout_fd
= safe_close(s
->stdout_fd
);
361 s
->stderr_fd
= safe_close(s
->stderr_fd
);
363 service_release_fd_store(s
);
366 static void service_done(Unit
*u
) {
367 Service
*s
= SERVICE(u
);
371 s
->pid_file
= mfree(s
->pid_file
);
372 s
->status_text
= mfree(s
->status_text
);
374 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
375 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
376 s
->control_command
= NULL
;
377 s
->main_command
= NULL
;
379 dynamic_creds_unref(&s
->dynamic_creds
);
381 exit_status_set_free(&s
->restart_prevent_status
);
382 exit_status_set_free(&s
->restart_force_status
);
383 exit_status_set_free(&s
->success_status
);
385 /* This will leak a process, but at least no memory or any of
387 service_unwatch_main_pid(s
);
388 service_unwatch_control_pid(s
);
389 service_unwatch_pid_file(s
);
392 unit_unwatch_bus_name(u
, s
->bus_name
);
393 s
->bus_name
= mfree(s
->bus_name
);
396 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
398 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
399 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
401 service_close_socket_fd(s
);
402 s
->peer
= socket_peer_unref(s
->peer
);
404 unit_ref_unset(&s
->accept_socket
);
406 service_stop_watchdog(s
);
408 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
409 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
411 service_release_resources(u
);
414 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
415 ServiceFDStore
*fs
= userdata
;
420 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
421 log_unit_debug(UNIT(fs
->service
),
422 "Received %s on stored fd %d (%s), closing.",
423 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
424 fs
->fd
, strna(fs
->fdname
));
425 service_fd_store_unlink(fs
);
429 static int service_add_fd_store(Service
*s
, int fd
, const char *name
) {
433 /* fd is always consumed if we return >= 0 */
438 if (s
->n_fd_store
>= s
->n_fd_store_max
)
439 return -EXFULL
; /* Our store is full.
440 * Use this errno rather than E[NM]FILE to distinguish from
441 * the case where systemd itself hits the file limit. */
443 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
444 r
= same_fd(fs
->fd
, fd
);
449 return 0; /* fd already included */
453 fs
= new0(ServiceFDStore
, 1);
459 fs
->fdname
= strdup(name
?: "stored");
465 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
466 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
471 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
473 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
476 return 1; /* fd newly stored */
479 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
) {
484 while (fdset_size(fds
) > 0) {
485 _cleanup_close_
int fd
= -1;
487 fd
= fdset_steal_first(fds
);
491 r
= service_add_fd_store(s
, fd
, name
);
493 return log_unit_warning_errno(UNIT(s
), r
,
494 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
497 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
499 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
506 static void service_remove_fd_store(Service
*s
, const char *name
) {
507 ServiceFDStore
*fs
, *n
;
512 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
513 if (!streq(fs
->fdname
, name
))
516 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
517 service_fd_store_unlink(fs
);
521 static int service_arm_timer(Service
*s
, usec_t usec
) {
526 if (s
->timer_event_source
) {
527 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
531 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
534 if (usec
== USEC_INFINITY
)
537 r
= sd_event_add_time(
538 UNIT(s
)->manager
->event
,
539 &s
->timer_event_source
,
542 service_dispatch_timer
, s
);
546 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
551 static int service_verify(Service
*s
) {
554 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
557 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
558 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
559 /* FailureAction= only makes sense if one of the start or stop commands is specified.
560 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
561 * either a command or SuccessAction= are required. */
563 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
567 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
568 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
572 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
573 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
577 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
578 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
582 if (s
->type
== SERVICE_ONESHOT
&& s
->restart
!= SERVICE_RESTART_NO
) {
583 log_unit_error(UNIT(s
), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
587 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
588 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
592 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
593 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
597 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
598 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
600 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
601 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
605 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
606 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
608 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
609 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
611 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
612 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
617 static int service_add_default_dependencies(Service
*s
) {
622 if (!UNIT(s
)->default_dependencies
)
625 /* Add a number of automatic dependencies useful for the
626 * majority of services. */
628 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
629 /* First, pull in the really early boot stuff, and
630 * require it, so that we fail if we can't acquire
633 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
638 /* In the --user instance there's no sysinit.target,
639 * in that case require basic.target instead. */
641 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
646 /* Second, if the rest of the base system is in the same
647 * transaction, order us after it, but do not pull it in or
648 * even require it. */
649 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
653 /* Third, add us in for normal shutdown. */
654 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
657 static void service_fix_output(Service
*s
) {
660 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
661 * however, since in that case we want output to default to the same place as we read input from. */
663 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
664 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
665 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
666 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
668 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
669 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
670 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
672 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
673 s
->exec_context
.stdin_data_size
> 0)
674 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
677 static int service_setup_bus_name(Service
*s
) {
685 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
687 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
689 /* We always want to be ordered against dbus.socket if both are in the transaction. */
690 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
692 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
694 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
696 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
698 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
703 static int service_add_extras(Service
*s
) {
708 if (s
->type
== _SERVICE_TYPE_INVALID
) {
709 /* Figure out a type automatically */
711 s
->type
= SERVICE_DBUS
;
712 else if (s
->exec_command
[SERVICE_EXEC_START
])
713 s
->type
= SERVICE_SIMPLE
;
715 s
->type
= SERVICE_ONESHOT
;
718 /* Oneshot services have disabled start timeout by default */
719 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
720 s
->timeout_start_usec
= USEC_INFINITY
;
722 service_fix_output(s
);
724 r
= unit_patch_contexts(UNIT(s
));
728 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
732 r
= unit_set_default_slice(UNIT(s
));
736 /* If the service needs the notify socket, let's enable it automatically. */
737 if (s
->notify_access
== NOTIFY_NONE
&&
738 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
739 s
->notify_access
= NOTIFY_MAIN
;
741 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
742 * delegation is on, in that case it we assume the payload knows better what to do and can process
743 * things in a more focused way. */
744 if (s
->oom_policy
< 0)
745 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
747 /* Let the kernel do the killing if that's requested. */
748 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
750 r
= service_add_default_dependencies(s
);
754 r
= service_setup_bus_name(s
);
761 static int service_load(Unit
*u
) {
762 Service
*s
= SERVICE(u
);
767 /* Load a .service file */
768 r
= unit_load_fragment(u
);
772 /* Still nothing found? Then let's give up */
773 if (u
->load_state
== UNIT_STUB
)
776 /* This is a new unit? Then let's add in some extras */
777 if (u
->load_state
== UNIT_LOADED
) {
779 /* We were able to load something, then let's add in
780 * the dropin directories. */
781 r
= unit_load_dropin(u
);
785 /* This is a new unit? Then let's add in some
787 r
= service_add_extras(s
);
792 return service_verify(s
);
795 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
796 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
],
797 buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
], buf_abort
[FORMAT_TIMESPAN_MAX
],
798 buf_clean
[FORMAT_TIMESPAN_MAX
];
799 ServiceExecCommand c
;
800 Service
*s
= SERVICE(u
);
805 prefix
= strempty(prefix
);
806 prefix2
= strjoina(prefix
, "\t");
809 "%sService State: %s\n"
811 "%sReload Result: %s\n"
812 "%sClean Result: %s\n"
813 "%sPermissionsStartOnly: %s\n"
814 "%sRootDirectoryStartOnly: %s\n"
815 "%sRemainAfterExit: %s\n"
816 "%sGuessMainPID: %s\n"
819 "%sNotifyAccess: %s\n"
820 "%sNotifyState: %s\n"
822 prefix
, service_state_to_string(s
->state
),
823 prefix
, service_result_to_string(s
->result
),
824 prefix
, service_result_to_string(s
->reload_result
),
825 prefix
, service_result_to_string(s
->clean_result
),
826 prefix
, yes_no(s
->permissions_start_only
),
827 prefix
, yes_no(s
->root_directory_start_only
),
828 prefix
, yes_no(s
->remain_after_exit
),
829 prefix
, yes_no(s
->guess_main_pid
),
830 prefix
, service_type_to_string(s
->type
),
831 prefix
, service_restart_to_string(s
->restart
),
832 prefix
, notify_access_to_string(s
->notify_access
),
833 prefix
, notify_state_to_string(s
->notify_state
),
834 prefix
, oom_policy_to_string(s
->oom_policy
));
836 if (s
->control_pid
> 0)
838 "%sControl PID: "PID_FMT
"\n",
839 prefix
, s
->control_pid
);
843 "%sMain PID: "PID_FMT
"\n"
844 "%sMain PID Known: %s\n"
845 "%sMain PID Alien: %s\n",
847 prefix
, yes_no(s
->main_pid_known
),
848 prefix
, yes_no(s
->main_pid_alien
));
853 prefix
, s
->pid_file
);
858 "%sBus Name Good: %s\n",
860 prefix
, yes_no(s
->bus_name_good
));
862 if (UNIT_ISSET(s
->accept_socket
))
864 "%sAccept Socket: %s\n",
865 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
869 "%sTimeoutStartSec: %s\n"
870 "%sTimeoutStopSec: %s\n",
871 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
872 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
873 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
));
875 if (s
->timeout_abort_set
)
877 "%sTimeoutAbortSec: %s\n",
878 prefix
, format_timespan(buf_abort
, sizeof(buf_abort
), s
->timeout_abort_usec
, USEC_PER_SEC
));
881 "%sTimeoutCleanSec: %s\n"
882 "%sRuntimeMaxSec: %s\n"
883 "%sWatchdogSec: %s\n",
884 prefix
, format_timespan(buf_clean
, sizeof(buf_clean
), s
->timeout_clean_usec
, USEC_PER_SEC
),
885 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
886 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
888 kill_context_dump(&s
->kill_context
, f
, prefix
);
889 exec_context_dump(&s
->exec_context
, f
, prefix
);
891 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
893 if (!s
->exec_command
[c
])
896 fprintf(f
, "%s-> %s:\n",
897 prefix
, service_exec_command_to_string(c
));
899 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
903 fprintf(f
, "%sStatus Text: %s\n",
904 prefix
, s
->status_text
);
906 if (s
->n_fd_store_max
> 0)
908 "%sFile Descriptor Store Max: %u\n"
909 "%sFile Descriptor Store Current: %zu\n",
910 prefix
, s
->n_fd_store_max
,
911 prefix
, s
->n_fd_store
);
913 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
916 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
920 assert(pid_is_valid(pid
));
922 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
923 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
926 if (pid
== getpid_cached() || pid
== 1) {
927 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
931 if (pid
== s
->control_pid
) {
932 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
936 if (!pid_is_alive(pid
)) {
937 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
941 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
942 if (owner
== UNIT(s
)) {
943 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
944 return 1; /* Yay, it's definitely a good PID */
947 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
950 static int service_load_pid_file(Service
*s
, bool may_warn
) {
951 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
952 bool questionable_pid_file
= false;
953 _cleanup_free_
char *k
= NULL
;
954 _cleanup_close_
int fd
= -1;
963 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
965 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
966 if (fd
== -ENOLINK
) {
967 log_unit_full(UNIT(s
), LOG_DEBUG
, fd
, "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
969 questionable_pid_file
= true;
971 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
974 return log_unit_full(UNIT(s
), prio
, fd
, "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
976 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd chase_symlinks() returned us into a proper fd first. */
977 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
978 r
= read_one_line_file(procfs
, &k
);
980 return log_unit_error_errno(UNIT(s
), r
, "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m", s
->pid_file
);
982 r
= parse_pid(k
, &pid
);
984 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
986 if (s
->main_pid_known
&& pid
== s
->main_pid
)
989 r
= service_is_suitable_main_pid(s
, pid
, prio
);
995 if (questionable_pid_file
) {
996 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1000 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1002 if (fstat(fd
, &st
) < 0)
1003 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1005 if (st
.st_uid
!= 0) {
1006 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
);
1010 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
);
1013 if (s
->main_pid_known
) {
1014 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1016 service_unwatch_main_pid(s
);
1017 s
->main_pid_known
= false;
1019 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1021 r
= service_set_main_pid(s
, pid
);
1025 r
= unit_watch_pid(UNIT(s
), pid
, false);
1026 if (r
< 0) /* FIXME: we need to do something here */
1027 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1032 static void service_search_main_pid(Service
*s
) {
1038 /* If we know it anyway, don't ever fallback to unreliable
1040 if (s
->main_pid_known
)
1043 if (!s
->guess_main_pid
)
1046 assert(s
->main_pid
<= 0);
1048 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1051 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1052 if (service_set_main_pid(s
, pid
) < 0)
1055 r
= unit_watch_pid(UNIT(s
), pid
, false);
1057 /* FIXME: we need to do something here */
1058 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1061 static void service_set_state(Service
*s
, ServiceState state
) {
1062 ServiceState old_state
;
1063 const UnitActiveState
*table
;
1067 if (s
->state
!= state
)
1068 bus_unit_send_pending_change_signal(UNIT(s
), false);
1070 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1072 old_state
= s
->state
;
1075 service_unwatch_pid_file(s
);
1078 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1081 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1082 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1083 SERVICE_AUTO_RESTART
,
1085 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1088 SERVICE_START
, SERVICE_START_POST
,
1089 SERVICE_RUNNING
, SERVICE_RELOAD
,
1090 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1091 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1092 service_unwatch_main_pid(s
);
1093 s
->main_command
= NULL
;
1097 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1099 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1100 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1101 SERVICE_CLEANING
)) {
1102 service_unwatch_control_pid(s
);
1103 s
->control_command
= NULL
;
1104 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1107 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1108 unit_unwatch_all_pids(UNIT(s
));
1109 unit_dequeue_rewatch_pids(UNIT(s
));
1113 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1114 SERVICE_RUNNING
, SERVICE_RELOAD
,
1115 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1116 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1117 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1118 service_close_socket_fd(s
);
1120 if (state
!= SERVICE_START
)
1121 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1123 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1124 service_stop_watchdog(s
);
1126 /* For the inactive states unit_notify() will trim the cgroup,
1127 * but for exit we have to do that ourselves... */
1128 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1129 unit_prune_cgroup(UNIT(s
));
1131 if (old_state
!= state
)
1132 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1134 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1135 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1136 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0) |
1137 (s
->result
== SERVICE_SKIP_CONDITION
? UNIT_NOTIFY_SKIP_CONDITION
: 0));
1140 static usec_t
service_coldplug_timeout(Service
*s
) {
1143 switch (s
->deserialized_state
) {
1145 case SERVICE_CONDITION
:
1146 case SERVICE_START_PRE
:
1148 case SERVICE_START_POST
:
1149 case SERVICE_RELOAD
:
1150 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1152 case SERVICE_RUNNING
:
1153 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1156 case SERVICE_STOP_SIGTERM
:
1157 case SERVICE_STOP_SIGKILL
:
1158 case SERVICE_STOP_POST
:
1159 case SERVICE_FINAL_SIGTERM
:
1160 case SERVICE_FINAL_SIGKILL
:
1161 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1163 case SERVICE_STOP_WATCHDOG
:
1164 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1166 case SERVICE_AUTO_RESTART
:
1167 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1169 case SERVICE_CLEANING
:
1170 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_clean_usec
);
1173 return USEC_INFINITY
;
1177 static int service_coldplug(Unit
*u
) {
1178 Service
*s
= SERVICE(u
);
1182 assert(s
->state
== SERVICE_DEAD
);
1184 if (s
->deserialized_state
== s
->state
)
1187 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1191 if (s
->main_pid
> 0 &&
1192 pid_is_unwaited(s
->main_pid
) &&
1193 (IN_SET(s
->deserialized_state
,
1194 SERVICE_START
, SERVICE_START_POST
,
1195 SERVICE_RUNNING
, SERVICE_RELOAD
,
1196 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1197 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1198 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1203 if (s
->control_pid
> 0 &&
1204 pid_is_unwaited(s
->control_pid
) &&
1205 IN_SET(s
->deserialized_state
,
1206 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1208 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1209 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1210 SERVICE_CLEANING
)) {
1211 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1216 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1217 (void) unit_enqueue_rewatch_pids(u
);
1218 (void) unit_setup_dynamic_creds(u
);
1219 (void) unit_setup_exec_runtime(u
);
1222 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1223 service_start_watchdog(s
);
1225 if (UNIT_ISSET(s
->accept_socket
)) {
1226 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1228 if (socket
->max_connections_per_source
> 0) {
1231 /* Make a best-effort attempt at bumping the connection count */
1232 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1233 socket_peer_unref(s
->peer
);
1239 service_set_state(s
, s
->deserialized_state
);
1243 static int service_collect_fds(
1247 size_t *n_socket_fds
,
1248 size_t *n_storage_fds
) {
1250 _cleanup_strv_free_
char **rfd_names
= NULL
;
1251 _cleanup_free_
int *rfds
= NULL
;
1252 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1258 assert(n_socket_fds
);
1259 assert(n_storage_fds
);
1261 if (s
->socket_fd
>= 0) {
1263 /* Pass the per-connection socket */
1268 rfds
[0] = s
->socket_fd
;
1270 rfd_names
= strv_new("connection");
1280 /* Pass all our configured sockets for singleton services */
1282 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1283 _cleanup_free_
int *cfds
= NULL
;
1287 if (u
->type
!= UNIT_SOCKET
)
1292 cn_fds
= socket_collect_fds(sock
, &cfds
);
1300 rfds
= TAKE_PTR(cfds
);
1301 rn_socket_fds
= cn_fds
;
1305 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1309 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1312 rn_socket_fds
+= cn_fds
;
1315 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1321 if (s
->n_fd_store
> 0) {
1327 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1333 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1338 n_fds
= rn_socket_fds
;
1340 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1341 rfds
[n_fds
] = fs
->fd
;
1342 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1343 if (!rfd_names
[n_fds
])
1350 rfd_names
[n_fds
] = NULL
;
1353 *fds
= TAKE_PTR(rfds
);
1354 *fd_names
= TAKE_PTR(rfd_names
);
1355 *n_socket_fds
= rn_socket_fds
;
1356 *n_storage_fds
= rn_storage_fds
;
1361 static int service_allocate_exec_fd_event_source(
1364 sd_event_source
**ret_event_source
) {
1366 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1371 assert(ret_event_source
);
1373 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1375 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1377 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1379 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1381 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1383 (void) sd_event_source_set_description(source
, "service event_fd");
1385 r
= sd_event_source_set_io_fd_own(source
, true);
1387 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1389 *ret_event_source
= TAKE_PTR(source
);
1393 static int service_allocate_exec_fd(
1395 sd_event_source
**ret_event_source
,
1398 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1402 assert(ret_event_source
);
1403 assert(ret_exec_fd
);
1405 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1406 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1408 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1413 *ret_exec_fd
= TAKE_FD(p
[1]);
1418 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1421 /* Notifications are accepted depending on the process and
1422 * the access setting of the service:
1423 * process: \ access: NONE MAIN EXEC ALL
1424 * main no yes yes yes
1425 * control no no yes yes
1426 * other (forked) no no no yes */
1428 if (flags
& EXEC_IS_CONTROL
)
1429 /* A control process */
1430 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1432 /* We only spawn main processes and control processes, so any
1433 * process that is not a control process is a main process */
1434 return s
->notify_access
!= NOTIFY_NONE
;
1437 static int service_spawn(
1444 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1451 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1452 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1453 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1454 _cleanup_close_
int exec_fd
= -1;
1455 _cleanup_free_
int *fds
= NULL
;
1463 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1467 if (flags
& EXEC_IS_CONTROL
) {
1468 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1469 if (s
->permissions_start_only
)
1470 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1471 if (s
->root_directory_start_only
)
1472 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1475 if ((flags
& EXEC_PASS_FDS
) ||
1476 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1477 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1478 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1480 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1484 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1487 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1488 assert(!s
->exec_fd_event_source
);
1490 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1495 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1499 our_env
= new0(char*, 10);
1503 if (service_exec_needs_notify_socket(s
, flags
))
1504 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1507 if (s
->main_pid
> 0)
1508 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1511 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1512 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1516 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1519 if (s
->socket_fd
>= 0) {
1520 union sockaddr_union sa
;
1521 socklen_t salen
= sizeof(sa
);
1523 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1524 * useful. Note that we do this only when we are still connected at this point in time, which we might
1525 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1526 * in ENOTCONN), and just use whate we can use. */
1528 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1529 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1531 _cleanup_free_
char *addr
= NULL
;
1535 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1539 t
= strjoin("REMOTE_ADDR=", addr
);
1542 our_env
[n_env
++] = t
;
1544 r
= sockaddr_port(&sa
.sa
, &port
);
1548 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1550 our_env
[n_env
++] = t
;
1554 if (flags
& EXEC_SETENV_RESULT
) {
1555 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1558 if (s
->main_exec_status
.pid
> 0 &&
1559 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1560 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1563 if (s
->main_exec_status
.code
== CLD_EXITED
)
1564 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1566 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1572 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1576 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1580 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1581 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1582 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1584 strv_free_and_replace(exec_params
.environment
, final_env
);
1585 exec_params
.fds
= fds
;
1586 exec_params
.fd_names
= fd_names
;
1587 exec_params
.n_socket_fds
= n_socket_fds
;
1588 exec_params
.n_storage_fds
= n_storage_fds
;
1589 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1590 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1591 if (s
->type
== SERVICE_IDLE
)
1592 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1593 exec_params
.stdin_fd
= s
->stdin_fd
;
1594 exec_params
.stdout_fd
= s
->stdout_fd
;
1595 exec_params
.stderr_fd
= s
->stderr_fd
;
1596 exec_params
.exec_fd
= exec_fd
;
1598 r
= exec_spawn(UNIT(s
),
1608 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1609 s
->exec_fd_hot
= false;
1611 r
= unit_watch_pid(UNIT(s
), pid
, true);
1620 static int main_pid_good(Service
*s
) {
1623 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1625 /* If we know the pid file, then let's just check if it is
1627 if (s
->main_pid_known
) {
1629 /* If it's an alien child let's check if it is still
1631 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1632 return pid_is_alive(s
->main_pid
);
1634 /* .. otherwise assume we'll get a SIGCHLD for it,
1635 * which we really should wait for to collect exit
1636 * status and code */
1637 return s
->main_pid
> 0;
1640 /* We don't know the pid */
1644 static int control_pid_good(Service
*s
) {
1647 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1648 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1649 * means: we can't figure it out. */
1651 return s
->control_pid
> 0;
1654 static int cgroup_good(Service
*s
) {
1659 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1662 if (!UNIT(s
)->cgroup_path
)
1665 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1672 static bool service_shall_restart(Service
*s
) {
1675 /* Don't restart after manual stops */
1676 if (s
->forbid_restart
)
1679 /* Never restart if this is configured as special exception */
1680 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.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
))
1687 switch (s
->restart
) {
1689 case SERVICE_RESTART_NO
:
1692 case SERVICE_RESTART_ALWAYS
:
1695 case SERVICE_RESTART_ON_SUCCESS
:
1696 return s
->result
== SERVICE_SUCCESS
;
1698 case SERVICE_RESTART_ON_FAILURE
:
1699 return s
->result
!= SERVICE_SUCCESS
;
1701 case SERVICE_RESTART_ON_ABNORMAL
:
1702 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1704 case SERVICE_RESTART_ON_WATCHDOG
:
1705 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1707 case SERVICE_RESTART_ON_ABORT
:
1708 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1711 assert_not_reached("unknown restart setting");
1715 static bool service_will_restart(Unit
*u
) {
1716 Service
*s
= SERVICE(u
);
1720 if (s
->will_auto_restart
)
1722 if (s
->state
== SERVICE_AUTO_RESTART
)
1726 if (UNIT(s
)->job
->type
== JOB_START
)
1732 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1733 ServiceState end_state
;
1738 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1739 * undo what has already been enqueued. */
1740 if (unit_stop_pending(UNIT(s
)))
1741 allow_restart
= false;
1743 if (s
->result
== SERVICE_SUCCESS
)
1746 if (s
->result
== SERVICE_SUCCESS
) {
1747 unit_log_success(UNIT(s
));
1748 end_state
= SERVICE_DEAD
;
1749 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1750 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1751 end_state
= SERVICE_DEAD
;
1753 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1754 end_state
= SERVICE_FAILED
;
1757 if (allow_restart
&& service_shall_restart(s
))
1758 s
->will_auto_restart
= true;
1760 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1761 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1762 s
->n_keep_fd_store
++;
1764 service_set_state(s
, end_state
);
1766 if (s
->will_auto_restart
) {
1767 s
->will_auto_restart
= false;
1769 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1771 s
->n_keep_fd_store
--;
1775 service_set_state(s
, SERVICE_AUTO_RESTART
);
1777 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1778 * user can still introspect the counter. Do so on the next start. */
1779 s
->flush_n_restarts
= true;
1781 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1782 * queue, so that the fd store is possibly gc'ed again */
1783 s
->n_keep_fd_store
--;
1784 unit_add_to_gc_queue(UNIT(s
));
1786 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1787 s
->forbid_restart
= false;
1789 /* We want fresh tmpdirs in case service is started again immediately */
1790 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1792 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1793 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1794 /* Also, remove the runtime directory */
1795 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1797 /* Get rid of the IPC bits of the user */
1798 unit_unref_uid_gid(UNIT(s
), true);
1800 /* Release the user, and destroy it if we are the only remaining owner */
1801 dynamic_creds_destroy(&s
->dynamic_creds
);
1803 /* Try to delete the pid file. At this point it will be
1804 * out-of-date, and some software might be confused by it, so
1805 * let's remove it. */
1807 (void) unlink(s
->pid_file
);
1809 /* Reset TTY ownership if necessary */
1810 exec_context_revert_tty(&s
->exec_context
);
1815 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1816 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1819 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1823 if (s
->result
== SERVICE_SUCCESS
)
1826 service_unwatch_control_pid(s
);
1827 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1829 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1830 if (s
->control_command
) {
1831 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1833 r
= service_spawn(s
,
1835 s
->timeout_stop_usec
,
1836 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1841 service_set_state(s
, SERVICE_STOP_POST
);
1843 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1848 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1849 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1852 static int state_to_kill_operation(ServiceState state
) {
1855 case SERVICE_STOP_WATCHDOG
:
1856 return KILL_WATCHDOG
;
1858 case SERVICE_STOP_SIGTERM
:
1859 case SERVICE_FINAL_SIGTERM
:
1860 return KILL_TERMINATE
;
1862 case SERVICE_STOP_SIGKILL
:
1863 case SERVICE_FINAL_SIGKILL
:
1867 return _KILL_OPERATION_INVALID
;
1871 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1876 if (s
->result
== SERVICE_SUCCESS
)
1879 /* Before sending any signal, make sure we track all members of this cgroup */
1880 (void) unit_watch_all_pids(UNIT(s
));
1882 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1884 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1886 r
= unit_kill_context(
1889 state_to_kill_operation(state
),
1897 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1898 state
== SERVICE_STOP_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1902 service_set_state(s
, state
);
1903 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1904 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1905 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1906 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1907 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1908 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1910 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1915 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1917 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1918 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1920 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1923 static void service_enter_stop_by_notify(Service
*s
) {
1926 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1928 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1930 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1931 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1934 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1939 if (s
->result
== SERVICE_SUCCESS
)
1942 service_unwatch_control_pid(s
);
1943 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1945 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1946 if (s
->control_command
) {
1947 s
->control_command_id
= SERVICE_EXEC_STOP
;
1949 r
= service_spawn(s
,
1951 s
->timeout_stop_usec
,
1952 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1957 service_set_state(s
, SERVICE_STOP
);
1959 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1964 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1965 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1968 static bool service_good(Service
*s
) {
1972 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1975 main_pid_ok
= main_pid_good(s
);
1976 if (main_pid_ok
> 0) /* It's alive */
1978 if (main_pid_ok
== 0) /* It's dead */
1981 /* OK, we don't know anything about the main PID, maybe
1982 * because there is none. Let's check the control group
1985 return cgroup_good(s
) != 0;
1988 static void service_enter_running(Service
*s
, ServiceResult f
) {
1991 if (s
->result
== SERVICE_SUCCESS
)
1994 service_unwatch_control_pid(s
);
1996 if (s
->result
!= SERVICE_SUCCESS
)
1997 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1998 else if (service_good(s
)) {
2000 /* If there are any queued up sd_notify() notifications, process them now */
2001 if (s
->notify_state
== NOTIFY_RELOADING
)
2002 service_enter_reload_by_notify(s
);
2003 else if (s
->notify_state
== NOTIFY_STOPPING
)
2004 service_enter_stop_by_notify(s
);
2006 service_set_state(s
, SERVICE_RUNNING
);
2007 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2010 } else if (s
->remain_after_exit
)
2011 service_set_state(s
, SERVICE_EXITED
);
2013 service_enter_stop(s
, SERVICE_SUCCESS
);
2016 static void service_enter_start_post(Service
*s
) {
2020 service_unwatch_control_pid(s
);
2021 service_reset_watchdog(s
);
2023 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2024 if (s
->control_command
) {
2025 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2027 r
= service_spawn(s
,
2029 s
->timeout_start_usec
,
2030 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2035 service_set_state(s
, SERVICE_START_POST
);
2037 service_enter_running(s
, SERVICE_SUCCESS
);
2042 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2043 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2046 static void service_kill_control_process(Service
*s
) {
2051 if (s
->control_pid
<= 0)
2054 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2056 _cleanup_free_
char *comm
= NULL
;
2058 (void) get_process_comm(s
->control_pid
, &comm
);
2060 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2061 s
->control_pid
, strna(comm
));
2065 static int service_adverse_to_leftover_processes(Service
*s
) {
2068 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2069 * SendSIGKILL is used for services that require a clean shutdown. These are typically database
2070 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or
2071 * startup time is quite variable (so Timeout settings aren't of use).
2073 * Here we take these two factors and refuse to start a service if there are existing processes
2074 * within a control group. Databases, while generally having some protection against multiple
2075 * instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service
2076 * aren't as rigoriously written to protect aganst against multiple use. */
2077 if (unit_warn_leftover_processes(UNIT(s
)) &&
2078 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2079 !s
->kill_context
.send_sigkill
)
2080 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2081 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2086 static void service_enter_start(Service
*s
) {
2094 service_unwatch_control_pid(s
);
2095 service_unwatch_main_pid(s
);
2097 r
= service_adverse_to_leftover_processes(s
);
2101 if (s
->type
== SERVICE_FORKING
) {
2102 s
->control_command_id
= SERVICE_EXEC_START
;
2103 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2105 s
->main_command
= NULL
;
2107 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2108 s
->control_command
= NULL
;
2110 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2114 if (s
->type
!= SERVICE_ONESHOT
) {
2115 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2116 * happen if the configuration changes at runtime. In this case, let's enter a failure
2118 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2123 /* We force a fake state transition here. Otherwise, the unit would go directly from
2124 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2125 * in between. This way we can later trigger actions that depend on the state
2126 * transition, including SuccessAction=. */
2127 service_set_state(s
, SERVICE_START
);
2129 service_enter_start_post(s
);
2133 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2134 /* For simple + idle this is the main process. We don't apply any timeout here, but
2135 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2136 timeout
= USEC_INFINITY
;
2138 timeout
= s
->timeout_start_usec
;
2140 r
= service_spawn(s
,
2143 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2148 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2149 /* For simple services we immediately start
2150 * the START_POST binaries. */
2152 service_set_main_pid(s
, pid
);
2153 service_enter_start_post(s
);
2155 } else if (s
->type
== SERVICE_FORKING
) {
2157 /* For forking services we wait until the start
2158 * process exited. */
2160 s
->control_pid
= pid
;
2161 service_set_state(s
, SERVICE_START
);
2163 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2165 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2167 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2168 * bus. 'notify' and 'exec' services are similar. */
2170 service_set_main_pid(s
, pid
);
2171 service_set_state(s
, SERVICE_START
);
2173 assert_not_reached("Unknown service type");
2178 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2179 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2182 static void service_enter_start_pre(Service
*s
) {
2187 service_unwatch_control_pid(s
);
2189 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2190 if (s
->control_command
) {
2192 r
= service_adverse_to_leftover_processes(s
);
2196 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2198 r
= service_spawn(s
,
2200 s
->timeout_start_usec
,
2201 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2206 service_set_state(s
, SERVICE_START_PRE
);
2208 service_enter_start(s
);
2213 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2214 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2217 static void service_enter_condition(Service
*s
) {
2222 service_unwatch_control_pid(s
);
2224 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2225 if (s
->control_command
) {
2227 r
= service_adverse_to_leftover_processes(s
);
2231 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2233 r
= service_spawn(s
,
2235 s
->timeout_start_usec
,
2236 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2242 service_set_state(s
, SERVICE_CONDITION
);
2244 service_enter_start_pre(s
);
2249 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2250 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2253 static void service_enter_restart(Service
*s
) {
2254 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2259 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2260 /* Don't restart things if we are going down anyway */
2261 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2263 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2270 /* Any units that are bound to this service must also be
2271 * restarted. We use JOB_RESTART (instead of the more obvious
2272 * JOB_START) here so that those dependency jobs will be added
2274 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2278 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2279 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2280 * explicitly however via the usual "systemctl reset-failure" logic. */
2282 s
->flush_n_restarts
= false;
2284 log_struct(LOG_INFO
,
2285 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2286 LOG_UNIT_ID(UNIT(s
)),
2287 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2288 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2289 "N_RESTARTS=%u", s
->n_restarts
);
2291 /* Notify clients about changed restart counter */
2292 unit_add_to_dbus_queue(UNIT(s
));
2294 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2295 * it will be canceled as part of the service_stop() call that
2296 * is executed as part of JOB_RESTART. */
2301 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2302 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2305 static void service_enter_reload_by_notify(Service
*s
) {
2306 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2311 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2312 service_set_state(s
, SERVICE_RELOAD
);
2314 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2315 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2317 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2320 static void service_enter_reload(Service
*s
) {
2325 service_unwatch_control_pid(s
);
2326 s
->reload_result
= SERVICE_SUCCESS
;
2328 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2329 if (s
->control_command
) {
2330 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2332 r
= service_spawn(s
,
2334 s
->timeout_start_usec
,
2335 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2340 service_set_state(s
, SERVICE_RELOAD
);
2342 service_enter_running(s
, SERVICE_SUCCESS
);
2347 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2348 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2349 service_enter_running(s
, SERVICE_SUCCESS
);
2352 static void service_run_next_control(Service
*s
) {
2357 assert(s
->control_command
);
2358 assert(s
->control_command
->command_next
);
2360 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2362 s
->control_command
= s
->control_command
->command_next
;
2363 service_unwatch_control_pid(s
);
2365 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2366 timeout
= s
->timeout_start_usec
;
2368 timeout
= s
->timeout_stop_usec
;
2370 r
= service_spawn(s
,
2373 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2374 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2375 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2376 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2384 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2386 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2387 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2388 else if (s
->state
== SERVICE_STOP_POST
)
2389 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2390 else if (s
->state
== SERVICE_RELOAD
) {
2391 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2392 service_enter_running(s
, SERVICE_SUCCESS
);
2394 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2397 static void service_run_next_main(Service
*s
) {
2402 assert(s
->main_command
);
2403 assert(s
->main_command
->command_next
);
2404 assert(s
->type
== SERVICE_ONESHOT
);
2406 s
->main_command
= s
->main_command
->command_next
;
2407 service_unwatch_main_pid(s
);
2409 r
= service_spawn(s
,
2411 s
->timeout_start_usec
,
2412 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2417 service_set_main_pid(s
, pid
);
2422 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2423 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2426 static int service_start(Unit
*u
) {
2427 Service
*s
= SERVICE(u
);
2432 /* We cannot fulfill this request right now, try again later
2434 if (IN_SET(s
->state
,
2435 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2436 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2439 /* Already on it! */
2440 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2443 /* A service that will be restarted must be stopped first to
2444 * trigger BindsTo and/or OnFailure dependencies. If a user
2445 * does not want to wait for the holdoff time to elapse, the
2446 * service should be manually restarted, not started. We
2447 * simply return EAGAIN here, so that any start jobs stay
2448 * queued, and assume that the auto restart timer will
2449 * eventually trigger the restart. */
2450 if (s
->state
== SERVICE_AUTO_RESTART
)
2453 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2455 /* Make sure we don't enter a busy loop of some kind. */
2456 r
= unit_test_start_limit(u
);
2458 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2462 r
= unit_acquire_invocation_id(u
);
2466 s
->result
= SERVICE_SUCCESS
;
2467 s
->reload_result
= SERVICE_SUCCESS
;
2468 s
->main_pid_known
= false;
2469 s
->main_pid_alien
= false;
2470 s
->forbid_restart
= false;
2472 s
->status_text
= mfree(s
->status_text
);
2473 s
->status_errno
= 0;
2475 s
->notify_state
= NOTIFY_UNKNOWN
;
2477 s
->watchdog_original_usec
= s
->watchdog_usec
;
2478 s
->watchdog_override_enable
= false;
2479 s
->watchdog_override_usec
= USEC_INFINITY
;
2481 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2482 exec_status_reset(&s
->main_exec_status
);
2484 /* This is not an automatic restart? Flush the restart counter then */
2485 if (s
->flush_n_restarts
) {
2487 s
->flush_n_restarts
= false;
2490 u
->reset_accounting
= true;
2492 service_enter_condition(s
);
2496 static int service_stop(Unit
*u
) {
2497 Service
*s
= SERVICE(u
);
2501 /* Don't create restart jobs from manual stops. */
2502 s
->forbid_restart
= true;
2505 if (IN_SET(s
->state
,
2506 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2507 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2510 /* A restart will be scheduled or is in progress. */
2511 if (s
->state
== SERVICE_AUTO_RESTART
) {
2512 service_set_state(s
, SERVICE_DEAD
);
2516 /* If there's already something running we go directly into
2518 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2519 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2523 /* If we are currently cleaning, then abort it, brutally. */
2524 if (s
->state
== SERVICE_CLEANING
) {
2525 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2529 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2531 service_enter_stop(s
, SERVICE_SUCCESS
);
2535 static int service_reload(Unit
*u
) {
2536 Service
*s
= SERVICE(u
);
2540 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2542 service_enter_reload(s
);
2546 _pure_
static bool service_can_reload(Unit
*u
) {
2547 Service
*s
= SERVICE(u
);
2551 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2554 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2555 Service
*s
= SERVICE(u
);
2557 ExecCommand
*first
, *c
;
2561 first
= s
->exec_command
[id
];
2563 /* Figure out where we are in the list by walking back to the beginning */
2564 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2570 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2571 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2572 size_t allocated
= 0, length
= 0;
2573 Service
*s
= SERVICE(u
);
2574 const char *type
, *key
;
2575 ServiceExecCommand id
;
2585 if (command
== s
->control_command
) {
2587 id
= s
->control_command_id
;
2590 id
= SERVICE_EXEC_START
;
2593 idx
= service_exec_command_index(u
, id
, command
);
2595 STRV_FOREACH(arg
, command
->argv
) {
2596 _cleanup_free_
char *e
= NULL
;
2604 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2608 args
[length
++] = ' ';
2610 args
[length
++] = '"';
2611 memcpy(args
+ length
, e
, n
);
2613 args
[length
++] = '"';
2616 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2621 p
= cescape(command
->path
);
2625 key
= strjoina(type
, "-command");
2626 return serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2629 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2630 Service
*s
= SERVICE(u
);
2638 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2639 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2640 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2642 if (s
->control_pid
> 0)
2643 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2645 if (s
->main_pid_known
&& s
->main_pid
> 0)
2646 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2648 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2649 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2650 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2652 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2653 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2655 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2659 service_serialize_exec_command(u
, f
, s
->control_command
);
2660 service_serialize_exec_command(u
, f
, s
->main_command
);
2662 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2665 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2668 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2672 if (s
->exec_fd_event_source
) {
2673 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2677 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2680 if (UNIT_ISSET(s
->accept_socket
)) {
2681 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2686 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2690 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2691 _cleanup_free_
char *c
= NULL
;
2694 copy
= fdset_put_dup(fds
, fs
->fd
);
2696 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2698 c
= cescape(fs
->fdname
);
2702 (void) serialize_item_format(f
, "fd-store-fd", "%i %s", copy
, c
);
2705 if (s
->main_exec_status
.pid
> 0) {
2706 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2707 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2708 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2710 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2711 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2712 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2716 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2717 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2719 if (s
->watchdog_override_enable
)
2720 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2722 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2723 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2728 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2729 Service
*s
= SERVICE(u
);
2731 unsigned idx
= 0, i
;
2732 bool control
, found
= false;
2733 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2734 ExecCommand
*command
= NULL
;
2735 _cleanup_free_
char *path
= NULL
;
2736 _cleanup_strv_free_
char **argv
= NULL
;
2738 enum ExecCommandState
{
2739 STATE_EXEC_COMMAND_TYPE
,
2740 STATE_EXEC_COMMAND_INDEX
,
2741 STATE_EXEC_COMMAND_PATH
,
2742 STATE_EXEC_COMMAND_ARGS
,
2743 _STATE_EXEC_COMMAND_MAX
,
2744 _STATE_EXEC_COMMAND_INVALID
= -1,
2751 control
= streq(key
, "control-command");
2753 state
= STATE_EXEC_COMMAND_TYPE
;
2756 _cleanup_free_
char *arg
= NULL
;
2758 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2765 case STATE_EXEC_COMMAND_TYPE
:
2766 id
= service_exec_command_from_string(arg
);
2770 state
= STATE_EXEC_COMMAND_INDEX
;
2772 case STATE_EXEC_COMMAND_INDEX
:
2773 r
= safe_atou(arg
, &idx
);
2777 state
= STATE_EXEC_COMMAND_PATH
;
2779 case STATE_EXEC_COMMAND_PATH
:
2780 path
= TAKE_PTR(arg
);
2781 state
= STATE_EXEC_COMMAND_ARGS
;
2783 if (!path_is_absolute(path
))
2786 case STATE_EXEC_COMMAND_ARGS
:
2787 r
= strv_extend(&argv
, arg
);
2792 assert_not_reached("Unknown error at deserialization of exec command");
2797 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2800 /* Let's check whether exec command on given offset matches data that we just deserialized */
2801 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2805 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2810 /* Command at the index we serialized is different, let's look for command that exactly
2811 * matches but is on different index. If there is no such command we will not resume execution. */
2812 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2813 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2817 if (command
&& control
)
2818 s
->control_command
= command
;
2820 s
->main_command
= command
;
2822 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2827 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2828 Service
*s
= SERVICE(u
);
2836 if (streq(key
, "state")) {
2839 state
= service_state_from_string(value
);
2841 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2843 s
->deserialized_state
= state
;
2844 } else if (streq(key
, "result")) {
2847 f
= service_result_from_string(value
);
2849 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2850 else if (f
!= SERVICE_SUCCESS
)
2853 } else if (streq(key
, "reload-result")) {
2856 f
= service_result_from_string(value
);
2858 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2859 else if (f
!= SERVICE_SUCCESS
)
2860 s
->reload_result
= f
;
2862 } else if (streq(key
, "control-pid")) {
2865 if (parse_pid(value
, &pid
) < 0)
2866 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2868 s
->control_pid
= pid
;
2869 } else if (streq(key
, "main-pid")) {
2872 if (parse_pid(value
, &pid
) < 0)
2873 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2875 (void) service_set_main_pid(s
, pid
);
2876 } else if (streq(key
, "main-pid-known")) {
2879 b
= parse_boolean(value
);
2881 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2883 s
->main_pid_known
= b
;
2884 } else if (streq(key
, "bus-name-good")) {
2887 b
= parse_boolean(value
);
2889 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2891 s
->bus_name_good
= b
;
2892 } else if (streq(key
, "bus-name-owner")) {
2893 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2895 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2896 } else if (streq(key
, "status-text")) {
2899 r
= cunescape(value
, 0, &t
);
2901 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2903 free_and_replace(s
->status_text
, t
);
2905 } else if (streq(key
, "accept-socket")) {
2908 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2910 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2912 unit_ref_set(&s
->accept_socket
, u
, socket
);
2913 SOCKET(socket
)->n_connections
++;
2916 } else if (streq(key
, "socket-fd")) {
2919 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2920 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2922 asynchronous_close(s
->socket_fd
);
2923 s
->socket_fd
= fdset_remove(fds
, fd
);
2925 } else if (streq(key
, "fd-store-fd")) {
2930 pf
= strcspn(value
, WHITESPACE
);
2931 fdv
= strndupa(value
, pf
);
2933 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2934 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2936 _cleanup_free_
char *t
= NULL
;
2940 fdn
+= strspn(fdn
, WHITESPACE
);
2941 (void) cunescape(fdn
, 0, &t
);
2943 r
= service_add_fd_store(s
, fd
, t
);
2945 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2947 fdset_remove(fds
, fd
);
2950 } else if (streq(key
, "main-exec-status-pid")) {
2953 if (parse_pid(value
, &pid
) < 0)
2954 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2956 s
->main_exec_status
.pid
= pid
;
2957 } else if (streq(key
, "main-exec-status-code")) {
2960 if (safe_atoi(value
, &i
) < 0)
2961 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2963 s
->main_exec_status
.code
= i
;
2964 } else if (streq(key
, "main-exec-status-status")) {
2967 if (safe_atoi(value
, &i
) < 0)
2968 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2970 s
->main_exec_status
.status
= i
;
2971 } else if (streq(key
, "main-exec-status-start"))
2972 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2973 else if (streq(key
, "main-exec-status-exit"))
2974 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2975 else if (streq(key
, "watchdog-timestamp"))
2976 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2977 else if (streq(key
, "forbid-restart")) {
2980 b
= parse_boolean(value
);
2982 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2984 s
->forbid_restart
= b
;
2985 } else if (streq(key
, "stdin-fd")) {
2988 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2989 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2991 asynchronous_close(s
->stdin_fd
);
2992 s
->stdin_fd
= fdset_remove(fds
, fd
);
2993 s
->exec_context
.stdio_as_fds
= true;
2995 } else if (streq(key
, "stdout-fd")) {
2998 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2999 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3001 asynchronous_close(s
->stdout_fd
);
3002 s
->stdout_fd
= fdset_remove(fds
, fd
);
3003 s
->exec_context
.stdio_as_fds
= true;
3005 } else if (streq(key
, "stderr-fd")) {
3008 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3009 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3011 asynchronous_close(s
->stderr_fd
);
3012 s
->stderr_fd
= fdset_remove(fds
, fd
);
3013 s
->exec_context
.stdio_as_fds
= true;
3015 } else if (streq(key
, "exec-fd")) {
3018 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3019 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3021 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3023 fd
= fdset_remove(fds
, fd
);
3024 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3027 } else if (streq(key
, "watchdog-override-usec")) {
3028 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3029 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3031 s
->watchdog_override_enable
= true;
3033 } else if (streq(key
, "watchdog-original-usec")) {
3034 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3035 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3037 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3038 r
= service_deserialize_exec_command(u
, key
, value
);
3040 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3042 } else if (streq(key
, "n-restarts")) {
3043 r
= safe_atou(value
, &s
->n_restarts
);
3045 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3047 } else if (streq(key
, "flush-n-restarts")) {
3048 r
= parse_boolean(value
);
3050 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3052 s
->flush_n_restarts
= r
;
3054 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3059 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3060 const UnitActiveState
*table
;
3064 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3066 return table
[SERVICE(u
)->state
];
3069 static const char *service_sub_state_to_string(Unit
*u
) {
3072 return service_state_to_string(SERVICE(u
)->state
);
3075 static bool service_may_gc(Unit
*u
) {
3076 Service
*s
= SERVICE(u
);
3080 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3081 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3082 * have moved outside of the cgroup. */
3084 if (main_pid_good(s
) > 0 ||
3085 control_pid_good(s
) > 0)
3091 static int service_retry_pid_file(Service
*s
) {
3094 assert(s
->pid_file
);
3095 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3097 r
= service_load_pid_file(s
, false);
3101 service_unwatch_pid_file(s
);
3103 service_enter_running(s
, SERVICE_SUCCESS
);
3107 static int service_watch_pid_file(Service
*s
) {
3110 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3112 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3116 /* the pidfile might have appeared just before we set the watch */
3117 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3118 service_retry_pid_file(s
);
3122 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3123 service_unwatch_pid_file(s
);
3127 static int service_demand_pid_file(Service
*s
) {
3130 assert(s
->pid_file
);
3131 assert(!s
->pid_file_pathspec
);
3133 ps
= new0(PathSpec
, 1);
3138 ps
->path
= strdup(s
->pid_file
);
3144 path_simplify(ps
->path
, false);
3146 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3147 * keep their PID file open all the time. */
3148 ps
->type
= PATH_MODIFIED
;
3149 ps
->inotify_fd
= -1;
3151 s
->pid_file_pathspec
= ps
;
3153 return service_watch_pid_file(s
);
3156 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3157 PathSpec
*p
= userdata
;
3162 s
= SERVICE(p
->unit
);
3166 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3167 assert(s
->pid_file_pathspec
);
3168 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3170 log_unit_debug(UNIT(s
), "inotify event");
3172 if (path_spec_fd_event(p
, events
) < 0)
3175 if (service_retry_pid_file(s
) == 0)
3178 if (service_watch_pid_file(s
) < 0)
3184 service_unwatch_pid_file(s
);
3185 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3189 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3190 Service
*s
= SERVICE(userdata
);
3194 log_unit_debug(UNIT(s
), "got exec-fd event");
3196 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3197 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3198 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3199 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3200 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3201 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3202 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3203 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3209 n
= read(fd
, &x
, sizeof(x
));
3211 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3214 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3216 if (n
== 0) { /* EOF → the event we are waiting for */
3218 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3220 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3221 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3223 s
->exec_fd_hot
= false;
3225 /* Nice! This is what we have been waiting for. Transition to next state. */
3226 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3227 service_enter_start_post(s
);
3229 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3234 /* A byte was read → this turns on/off the exec fd logic */
3235 assert(n
== sizeof(x
));
3242 static void service_notify_cgroup_empty_event(Unit
*u
) {
3243 Service
*s
= SERVICE(u
);
3247 log_unit_debug(u
, "Control group is empty.");
3251 /* Waiting for SIGCHLD is usually more interesting,
3252 * because it includes return codes/signals. Which is
3253 * why we ignore the cgroup events for most cases,
3254 * except when we don't know pid which to expect the
3258 if (s
->type
== SERVICE_NOTIFY
&&
3259 main_pid_good(s
) == 0 &&
3260 control_pid_good(s
) == 0) {
3261 /* No chance of getting a ready notification anymore */
3262 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3267 case SERVICE_START_POST
:
3268 if (s
->pid_file_pathspec
&&
3269 main_pid_good(s
) == 0 &&
3270 control_pid_good(s
) == 0) {
3272 /* Give up hoping for the daemon to write its PID file */
3273 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3275 service_unwatch_pid_file(s
);
3276 if (s
->state
== SERVICE_START
)
3277 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3279 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3283 case SERVICE_RUNNING
:
3284 /* service_enter_running() will figure out what to do */
3285 service_enter_running(s
, SERVICE_SUCCESS
);
3288 case SERVICE_STOP_WATCHDOG
:
3289 case SERVICE_STOP_SIGTERM
:
3290 case SERVICE_STOP_SIGKILL
:
3292 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3293 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3297 case SERVICE_STOP_POST
:
3298 case SERVICE_FINAL_SIGTERM
:
3299 case SERVICE_FINAL_SIGKILL
:
3300 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3301 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3310 static void service_notify_cgroup_oom_event(Unit
*u
) {
3311 Service
*s
= SERVICE(u
);
3313 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3315 if (s
->oom_policy
== OOM_CONTINUE
)
3320 case SERVICE_CONDITION
:
3321 case SERVICE_START_PRE
:
3323 case SERVICE_START_POST
:
3325 if (s
->oom_policy
== OOM_STOP
)
3326 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3327 else if (s
->oom_policy
== OOM_KILL
)
3328 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3332 case SERVICE_EXITED
:
3333 case SERVICE_RUNNING
:
3334 if (s
->oom_policy
== OOM_STOP
)
3335 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3336 else if (s
->oom_policy
== OOM_KILL
)
3337 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3341 case SERVICE_STOP_WATCHDOG
:
3342 case SERVICE_STOP_SIGTERM
:
3343 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3346 case SERVICE_STOP_SIGKILL
:
3347 case SERVICE_FINAL_SIGKILL
:
3348 if (s
->result
== SERVICE_SUCCESS
)
3349 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3352 case SERVICE_STOP_POST
:
3353 case SERVICE_FINAL_SIGTERM
:
3354 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3362 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3363 bool notify_dbus
= true;
3364 Service
*s
= SERVICE(u
);
3366 ExitClean clean_mode
;
3371 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3372 * considered daemons as they are typically not long running. */
3373 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3374 clean_mode
= EXIT_CLEAN_COMMAND
;
3376 clean_mode
= EXIT_CLEAN_DAEMON
;
3378 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3379 f
= SERVICE_SUCCESS
;
3380 else if (code
== CLD_EXITED
)
3381 f
= SERVICE_FAILURE_EXIT_CODE
;
3382 else if (code
== CLD_KILLED
)
3383 f
= SERVICE_FAILURE_SIGNAL
;
3384 else if (code
== CLD_DUMPED
)
3385 f
= SERVICE_FAILURE_CORE_DUMP
;
3387 assert_not_reached("Unknown code");
3389 if (s
->main_pid
== pid
) {
3390 /* Forking services may occasionally move to a new PID.
3391 * As long as they update the PID file before exiting the old
3392 * PID, they're fine. */
3393 if (service_load_pid_file(s
, false) > 0)
3397 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3399 if (s
->main_command
) {
3400 /* If this is not a forking service than the
3401 * main process got started and hence we copy
3402 * the exit status so that it is recorded both
3403 * as main and as control process exit
3406 s
->main_command
->exec_status
= s
->main_exec_status
;
3408 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3409 f
= SERVICE_SUCCESS
;
3410 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3412 /* If this is a forked process, then we should
3413 * ignore the return value if this was
3414 * configured for the starter process */
3416 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3417 f
= SERVICE_SUCCESS
;
3420 unit_log_process_exit(
3423 service_exec_command_to_string(SERVICE_EXEC_START
),
3424 f
== SERVICE_SUCCESS
,
3427 if (s
->result
== SERVICE_SUCCESS
)
3430 if (s
->main_command
&&
3431 s
->main_command
->command_next
&&
3432 s
->type
== SERVICE_ONESHOT
&&
3433 f
== SERVICE_SUCCESS
) {
3435 /* There is another command to *
3436 * execute, so let's do that. */
3438 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3439 service_run_next_main(s
);
3443 /* The service exited, so the service is officially
3445 s
->main_command
= NULL
;
3449 case SERVICE_START_POST
:
3450 case SERVICE_RELOAD
:
3452 /* Need to wait until the operation is
3457 if (s
->type
== SERVICE_ONESHOT
) {
3458 /* This was our main goal, so let's go on */
3459 if (f
== SERVICE_SUCCESS
)
3460 service_enter_start_post(s
);
3462 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3464 } else if (s
->type
== SERVICE_NOTIFY
) {
3465 /* Only enter running through a notification, so that the
3466 * SERVICE_START state signifies that no ready notification
3467 * has been received */
3468 if (f
!= SERVICE_SUCCESS
)
3469 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3470 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3471 /* The service has never been and will never be active */
3472 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3477 case SERVICE_RUNNING
:
3478 service_enter_running(s
, f
);
3481 case SERVICE_STOP_WATCHDOG
:
3482 case SERVICE_STOP_SIGTERM
:
3483 case SERVICE_STOP_SIGKILL
:
3485 if (control_pid_good(s
) <= 0)
3486 service_enter_stop_post(s
, f
);
3488 /* If there is still a control process, wait for that first */
3491 case SERVICE_STOP_POST
:
3492 case SERVICE_FINAL_SIGTERM
:
3493 case SERVICE_FINAL_SIGKILL
:
3495 if (control_pid_good(s
) <= 0)
3496 service_enter_dead(s
, f
, true);
3500 assert_not_reached("Uh, main process died at wrong time.");
3504 } else if (s
->control_pid
== pid
) {
3507 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3508 if (f
== SERVICE_FAILURE_EXIT_CODE
&& s
->state
== SERVICE_CONDITION
&& status
< 255)
3509 f
= SERVICE_SKIP_CONDITION
;
3511 if (s
->control_command
) {
3512 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3514 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3515 f
= SERVICE_SUCCESS
;
3518 unit_log_process_exit(
3521 service_exec_command_to_string(s
->control_command_id
),
3522 f
== SERVICE_SUCCESS
,
3525 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3528 if (s
->control_command
&&
3529 s
->control_command
->command_next
&&
3530 f
== SERVICE_SUCCESS
) {
3532 /* There is another command to *
3533 * execute, so let's do that. */
3535 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3536 service_run_next_control(s
);
3539 /* No further commands for this step, so let's
3540 * figure out what to do next */
3542 s
->control_command
= NULL
;
3543 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3545 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3549 case SERVICE_CONDITION
:
3550 if (f
== SERVICE_SUCCESS
)
3551 service_enter_start_pre(s
);
3553 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3556 case SERVICE_START_PRE
:
3557 if (f
== SERVICE_SUCCESS
)
3558 service_enter_start(s
);
3560 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3564 if (s
->type
!= SERVICE_FORKING
)
3565 /* Maybe spurious event due to a reload that changed the type? */
3568 if (f
!= SERVICE_SUCCESS
) {
3569 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3574 bool has_start_post
;
3577 /* Let's try to load the pid file here if we can.
3578 * The PID file might actually be created by a START_POST
3579 * script. In that case don't worry if the loading fails. */
3581 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3582 r
= service_load_pid_file(s
, !has_start_post
);
3583 if (!has_start_post
&& r
< 0) {
3584 r
= service_demand_pid_file(s
);
3585 if (r
< 0 || cgroup_good(s
) == 0)
3586 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3590 service_search_main_pid(s
);
3592 service_enter_start_post(s
);
3595 case SERVICE_START_POST
:
3596 if (f
!= SERVICE_SUCCESS
) {
3597 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3604 r
= service_load_pid_file(s
, true);
3606 r
= service_demand_pid_file(s
);
3607 if (r
< 0 || cgroup_good(s
) == 0)
3608 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3612 service_search_main_pid(s
);
3614 service_enter_running(s
, SERVICE_SUCCESS
);
3617 case SERVICE_RELOAD
:
3618 if (f
== SERVICE_SUCCESS
)
3619 if (service_load_pid_file(s
, true) < 0)
3620 service_search_main_pid(s
);
3622 s
->reload_result
= f
;
3623 service_enter_running(s
, SERVICE_SUCCESS
);
3627 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3630 case SERVICE_STOP_WATCHDOG
:
3631 case SERVICE_STOP_SIGTERM
:
3632 case SERVICE_STOP_SIGKILL
:
3633 if (main_pid_good(s
) <= 0)
3634 service_enter_stop_post(s
, f
);
3636 /* If there is still a service process around, wait until
3637 * that one quit, too */
3640 case SERVICE_STOP_POST
:
3641 case SERVICE_FINAL_SIGTERM
:
3642 case SERVICE_FINAL_SIGKILL
:
3643 if (main_pid_good(s
) <= 0)
3644 service_enter_dead(s
, f
, true);
3647 case SERVICE_CLEANING
:
3649 if (s
->clean_result
== SERVICE_SUCCESS
)
3650 s
->clean_result
= f
;
3652 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3656 assert_not_reached("Uh, control process died at wrong time.");
3659 } else /* Neither control nor main PID? If so, don't notify about anything */
3660 notify_dbus
= false;
3662 /* Notify clients about changed exit status */
3664 unit_add_to_dbus_queue(u
);
3666 /* We watch the main/control process otherwise we can't retrieve the unit they
3667 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3668 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3669 * detect when the cgroup becomes empty. Note that the control process is always
3670 * our child so it's pointless to watch all other processes. */
3671 if (!control_pid_good(s
))
3672 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3673 (void) unit_enqueue_rewatch_pids(u
);
3676 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3677 Service
*s
= SERVICE(userdata
);
3680 assert(source
== s
->timer_event_source
);
3684 case SERVICE_CONDITION
:
3685 case SERVICE_START_PRE
:
3687 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3688 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3691 case SERVICE_START_POST
:
3692 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3693 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3696 case SERVICE_RUNNING
:
3697 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3698 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3701 case SERVICE_RELOAD
:
3702 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3703 service_kill_control_process(s
);
3704 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3705 service_enter_running(s
, SERVICE_SUCCESS
);
3709 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3710 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3713 case SERVICE_STOP_WATCHDOG
:
3714 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3715 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3718 case SERVICE_STOP_SIGTERM
:
3719 if (s
->kill_context
.send_sigkill
) {
3720 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3721 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3723 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3724 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3729 case SERVICE_STOP_SIGKILL
:
3730 /* Uh, we sent a SIGKILL and it is still not gone?
3731 * Must be something we cannot kill, so let's just be
3732 * weirded out and continue */
3734 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3735 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3738 case SERVICE_STOP_POST
:
3739 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3740 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3743 case SERVICE_FINAL_SIGTERM
:
3744 if (s
->kill_context
.send_sigkill
) {
3745 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3746 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3748 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3749 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3754 case SERVICE_FINAL_SIGKILL
:
3755 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3756 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3759 case SERVICE_AUTO_RESTART
:
3760 if (s
->restart_usec
> 0) {
3761 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3762 log_unit_info(UNIT(s
),
3763 "Service RestartSec=%s expired, scheduling restart.",
3764 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3766 log_unit_info(UNIT(s
),
3767 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3769 service_enter_restart(s
);
3772 case SERVICE_CLEANING
:
3773 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3775 if (s
->clean_result
== SERVICE_SUCCESS
)
3776 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3778 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3782 assert_not_reached("Timeout at wrong time.");
3788 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3789 Service
*s
= SERVICE(userdata
);
3790 char t
[FORMAT_TIMESPAN_MAX
];
3791 usec_t watchdog_usec
;
3794 assert(source
== s
->watchdog_event_source
);
3796 watchdog_usec
= service_get_watchdog_usec(s
);
3798 if (UNIT(s
)->manager
->service_watchdogs
) {
3799 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3800 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3802 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3804 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3805 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3810 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3813 if (s
->notify_access
== NOTIFY_NONE
) {
3814 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3818 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3819 if (s
->main_pid
!= 0)
3820 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
);
3822 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
);
3827 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3828 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3829 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
,
3830 pid
, s
->main_pid
, s
->control_pid
);
3831 else 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
);
3833 else if (s
->control_pid
!= 0)
3834 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
);
3836 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
);
3844 static void service_force_watchdog(Service
*s
) {
3845 if (!UNIT(s
)->manager
->service_watchdogs
)
3848 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3849 s
->status_text
? s
->status_text
: "<unset>");
3851 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3854 static void service_notify_message(
3856 const struct ucred
*ucred
,
3860 Service
*s
= SERVICE(u
);
3861 bool notify_dbus
= false;
3869 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3872 if (DEBUG_LOGGING
) {
3873 _cleanup_free_
char *cc
= NULL
;
3875 cc
= strv_join(tags
, ", ");
3876 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3879 /* Interpret MAINPID= */
3880 e
= strv_find_startswith(tags
, "MAINPID=");
3881 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3884 if (parse_pid(e
, &new_main_pid
) < 0)
3885 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3886 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3888 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3890 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
3892 if (ucred
->uid
== 0) {
3893 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
);
3896 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3899 service_set_main_pid(s
, new_main_pid
);
3901 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
3903 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3910 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3911 STRV_FOREACH_BACKWARDS(i
, tags
) {
3913 if (streq(*i
, "READY=1")) {
3914 s
->notify_state
= NOTIFY_READY
;
3916 /* Type=notify services inform us about completed
3917 * initialization with READY=1 */
3918 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3919 service_enter_start_post(s
);
3921 /* Sending READY=1 while we are reloading informs us
3922 * that the reloading is complete */
3923 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3924 service_enter_running(s
, SERVICE_SUCCESS
);
3929 } else if (streq(*i
, "RELOADING=1")) {
3930 s
->notify_state
= NOTIFY_RELOADING
;
3932 if (s
->state
== SERVICE_RUNNING
)
3933 service_enter_reload_by_notify(s
);
3938 } else if (streq(*i
, "STOPPING=1")) {
3939 s
->notify_state
= NOTIFY_STOPPING
;
3941 if (s
->state
== SERVICE_RUNNING
)
3942 service_enter_stop_by_notify(s
);
3949 /* Interpret STATUS= */
3950 e
= strv_find_startswith(tags
, "STATUS=");
3952 _cleanup_free_
char *t
= NULL
;
3955 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3956 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3957 if (strlen(e
) > STATUS_TEXT_MAX
)
3958 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3959 else if (!utf8_is_valid(e
))
3960 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
3968 if (!streq_ptr(s
->status_text
, t
)) {
3969 free_and_replace(s
->status_text
, t
);
3974 /* Interpret ERRNO= */
3975 e
= strv_find_startswith(tags
, "ERRNO=");
3979 status_errno
= parse_errno(e
);
3980 if (status_errno
< 0)
3981 log_unit_warning_errno(u
, status_errno
,
3982 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
3983 else if (s
->status_errno
!= status_errno
) {
3984 s
->status_errno
= status_errno
;
3989 /* Interpret EXTEND_TIMEOUT= */
3990 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3992 usec_t extend_timeout_usec
;
3993 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3994 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3996 service_extend_timeout(s
, extend_timeout_usec
);
3999 /* Interpret WATCHDOG= */
4000 e
= strv_find_startswith(tags
, "WATCHDOG=");
4003 service_reset_watchdog(s
);
4004 else if (streq(e
, "trigger"))
4005 service_force_watchdog(s
);
4007 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4010 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4012 usec_t watchdog_override_usec
;
4013 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4014 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4016 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4019 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4020 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4021 * fds, but optional when pushing in new fds, for compatibility reasons. */
4022 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4025 name
= strv_find_startswith(tags
, "FDNAME=");
4026 if (!name
|| !fdname_is_valid(name
))
4027 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4029 service_remove_fd_store(s
, name
);
4031 } else if (strv_find(tags
, "FDSTORE=1")) {
4034 name
= strv_find_startswith(tags
, "FDNAME=");
4035 if (name
&& !fdname_is_valid(name
)) {
4036 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4040 (void) service_add_fd_store_set(s
, fds
, name
);
4043 /* Notify clients about changed status or main pid */
4045 unit_add_to_dbus_queue(u
);
4048 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4049 Service
*s
= SERVICE(u
);
4053 if (!s
->timer_event_source
)
4056 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4059 if (t
== USEC_INFINITY
)
4066 static void service_bus_name_owner_change(
4068 const char *old_owner
,
4069 const char *new_owner
) {
4071 Service
*s
= SERVICE(u
);
4076 assert(old_owner
|| new_owner
);
4078 if (old_owner
&& new_owner
)
4079 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", s
->bus_name
, old_owner
, new_owner
);
4081 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", s
->bus_name
, old_owner
);
4083 log_unit_debug(u
, "D-Bus name %s now registered by %s", s
->bus_name
, new_owner
);
4085 s
->bus_name_good
= !!new_owner
;
4087 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4088 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4090 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4094 if (s
->type
== SERVICE_DBUS
) {
4096 /* service_enter_running() will figure out what to
4098 if (s
->state
== SERVICE_RUNNING
)
4099 service_enter_running(s
, SERVICE_SUCCESS
);
4100 else if (s
->state
== SERVICE_START
&& new_owner
)
4101 service_enter_start_post(s
);
4103 } else if (new_owner
&&
4111 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4114 /* Try to acquire PID from bus service */
4116 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4118 r
= sd_bus_creds_get_pid(creds
, &pid
);
4120 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4122 service_set_main_pid(s
, pid
);
4123 unit_watch_pid(UNIT(s
), pid
, false);
4128 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4129 _cleanup_free_
char *peer
= NULL
;
4135 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4136 * to be configured. We take ownership of the passed fd on success. */
4138 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4141 if (s
->socket_fd
>= 0)
4144 if (s
->state
!= SERVICE_DEAD
)
4147 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4149 if (UNIT(s
)->description
) {
4150 _cleanup_free_
char *a
;
4152 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4156 r
= unit_set_description(UNIT(s
), a
);
4158 r
= unit_set_description(UNIT(s
), peer
);
4164 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4169 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4171 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4175 static void service_reset_failed(Unit
*u
) {
4176 Service
*s
= SERVICE(u
);
4180 if (s
->state
== SERVICE_FAILED
)
4181 service_set_state(s
, SERVICE_DEAD
);
4183 s
->result
= SERVICE_SUCCESS
;
4184 s
->reload_result
= SERVICE_SUCCESS
;
4185 s
->clean_result
= SERVICE_SUCCESS
;
4187 s
->flush_n_restarts
= false;
4190 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4191 Service
*s
= SERVICE(u
);
4195 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4198 static int service_main_pid(Unit
*u
) {
4199 Service
*s
= SERVICE(u
);
4206 static int service_control_pid(Unit
*u
) {
4207 Service
*s
= SERVICE(u
);
4211 return s
->control_pid
;
4214 static bool service_needs_console(Unit
*u
) {
4215 Service
*s
= SERVICE(u
);
4219 /* We provide our own implementation of this here, instead of relying of the generic implementation
4220 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4222 if (!exec_context_may_touch_console(&s
->exec_context
))
4225 return IN_SET(s
->state
,
4233 SERVICE_STOP_WATCHDOG
,
4234 SERVICE_STOP_SIGTERM
,
4235 SERVICE_STOP_SIGKILL
,
4237 SERVICE_FINAL_SIGTERM
,
4238 SERVICE_FINAL_SIGKILL
);
4241 static int service_exit_status(Unit
*u
) {
4242 Service
*s
= SERVICE(u
);
4246 if (s
->main_exec_status
.pid
<= 0 ||
4247 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4250 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4253 return s
->main_exec_status
.status
;
4256 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4257 _cleanup_strv_free_
char **l
= NULL
;
4258 Service
*s
= SERVICE(u
);
4265 if (s
->state
!= SERVICE_DEAD
)
4268 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4272 if (strv_isempty(l
))
4275 service_unwatch_control_pid(s
);
4276 s
->clean_result
= SERVICE_SUCCESS
;
4277 s
->control_command
= NULL
;
4278 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4280 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_clean_usec
));
4284 r
= unit_fork_helper_process(UNIT(s
), "(sd-rmrf)", &pid
);
4288 int ret
= EXIT_SUCCESS
;
4291 STRV_FOREACH(i
, l
) {
4292 r
= rm_rf(*i
, REMOVE_ROOT
|REMOVE_PHYSICAL
|REMOVE_MISSING_OK
);
4294 log_error_errno(r
, "Failed to remove '%s': %m", *i
);
4302 r
= unit_watch_pid(u
, pid
, true);
4306 s
->control_pid
= pid
;
4308 service_set_state(s
, SERVICE_CLEANING
);
4313 log_unit_warning_errno(UNIT(s
), r
, "Failed to initiate cleaning: %m");
4314 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4315 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4319 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4320 Service
*s
= SERVICE(u
);
4324 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4327 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4328 [SERVICE_RESTART_NO
] = "no",
4329 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4330 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4331 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4332 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4333 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4334 [SERVICE_RESTART_ALWAYS
] = "always",
4337 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4339 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4340 [SERVICE_SIMPLE
] = "simple",
4341 [SERVICE_FORKING
] = "forking",
4342 [SERVICE_ONESHOT
] = "oneshot",
4343 [SERVICE_DBUS
] = "dbus",
4344 [SERVICE_NOTIFY
] = "notify",
4345 [SERVICE_IDLE
] = "idle",
4346 [SERVICE_EXEC
] = "exec",
4349 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4351 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4352 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4353 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4354 [SERVICE_EXEC_START
] = "ExecStart",
4355 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4356 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4357 [SERVICE_EXEC_STOP
] = "ExecStop",
4358 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4361 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4363 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4364 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4365 [SERVICE_EXEC_START
] = "ExecStartEx",
4366 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
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,
4413 .init
= service_init
,
4414 .done
= service_done
,
4415 .load
= service_load
,
4416 .release_resources
= service_release_resources
,
4418 .coldplug
= service_coldplug
,
4420 .dump
= service_dump
,
4422 .start
= service_start
,
4423 .stop
= service_stop
,
4424 .reload
= service_reload
,
4426 .can_reload
= service_can_reload
,
4428 .kill
= service_kill
,
4429 .clean
= service_clean
,
4430 .can_clean
= service_can_clean
,
4432 .serialize
= service_serialize
,
4433 .deserialize_item
= service_deserialize_item
,
4435 .active_state
= service_active_state
,
4436 .sub_state_to_string
= service_sub_state_to_string
,
4438 .will_restart
= service_will_restart
,
4440 .may_gc
= service_may_gc
,
4442 .sigchld_event
= service_sigchld_event
,
4444 .reset_failed
= service_reset_failed
,
4446 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4447 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4448 .notify_message
= service_notify_message
,
4450 .main_pid
= service_main_pid
,
4451 .control_pid
= service_control_pid
,
4453 .bus_name_owner_change
= service_bus_name_owner_change
,
4455 .bus_vtable
= bus_service_vtable
,
4456 .bus_set_property
= bus_service_set_property
,
4457 .bus_commit_properties
= bus_service_commit_properties
,
4459 .get_timeout
= service_get_timeout
,
4460 .needs_console
= service_needs_console
,
4461 .exit_status
= service_exit_status
,
4463 .status_message_formats
= {
4464 .starting_stopping
= {
4465 [0] = "Starting %s...",
4466 [1] = "Stopping %s...",
4468 .finished_start_job
= {
4469 [JOB_DONE
] = "Started %s.",
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.",