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"
33 #include "serialize.h"
35 #include "signal-util.h"
37 #include "stdio-util.h"
38 #include "string-table.h"
39 #include "string-util.h"
41 #include "unit-name.h"
46 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
47 [SERVICE_DEAD
] = UNIT_INACTIVE
,
48 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
49 [SERVICE_START
] = UNIT_ACTIVATING
,
50 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
51 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
52 [SERVICE_EXITED
] = UNIT_ACTIVE
,
53 [SERVICE_RELOAD
] = UNIT_RELOADING
,
54 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
55 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
59 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
60 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
61 [SERVICE_FAILED
] = UNIT_FAILED
,
62 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
65 /* For Type=idle we never want to delay any other jobs, hence we
66 * consider idle jobs active as soon as we start working on them */
67 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
68 [SERVICE_DEAD
] = UNIT_INACTIVE
,
69 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
70 [SERVICE_START
] = UNIT_ACTIVE
,
71 [SERVICE_START_POST
] = UNIT_ACTIVE
,
72 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
73 [SERVICE_EXITED
] = UNIT_ACTIVE
,
74 [SERVICE_RELOAD
] = UNIT_RELOADING
,
75 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
76 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
77 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
78 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
79 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
80 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
81 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
82 [SERVICE_FAILED
] = UNIT_FAILED
,
83 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
86 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
87 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
88 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
89 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
91 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
92 static void service_enter_reload_by_notify(Service
*s
);
94 static void service_init(Unit
*u
) {
95 Service
*s
= SERVICE(u
);
98 assert(u
->load_state
== UNIT_STUB
);
100 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
101 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
102 s
->restart_usec
= u
->manager
->default_restart_usec
;
103 s
->runtime_max_usec
= USEC_INFINITY
;
104 s
->type
= _SERVICE_TYPE_INVALID
;
106 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
107 s
->guess_main_pid
= true;
109 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
111 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
112 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
114 s
->watchdog_original_usec
= USEC_INFINITY
;
116 s
->oom_policy
= _OOM_POLICY_INVALID
;
119 static void service_unwatch_control_pid(Service
*s
) {
122 if (s
->control_pid
<= 0)
125 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
129 static void service_unwatch_main_pid(Service
*s
) {
132 if (s
->main_pid
<= 0)
135 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
139 static void service_unwatch_pid_file(Service
*s
) {
140 if (!s
->pid_file_pathspec
)
143 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
144 path_spec_unwatch(s
->pid_file_pathspec
);
145 path_spec_done(s
->pid_file_pathspec
);
146 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
149 static int service_set_main_pid(Service
*s
, pid_t pid
) {
155 if (pid
== getpid_cached())
158 if (s
->main_pid
== pid
&& s
->main_pid_known
)
161 if (s
->main_pid
!= pid
) {
162 service_unwatch_main_pid(s
);
163 exec_status_start(&s
->main_exec_status
, pid
);
167 s
->main_pid_known
= true;
168 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
170 if (s
->main_pid_alien
)
171 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
176 void service_close_socket_fd(Service
*s
) {
179 /* Undo the effect of service_set_socket_fd(). */
181 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
183 if (UNIT_ISSET(s
->accept_socket
)) {
184 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
185 unit_ref_unset(&s
->accept_socket
);
189 static void service_stop_watchdog(Service
*s
) {
192 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
193 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
196 static usec_t
service_get_watchdog_usec(Service
*s
) {
199 if (s
->watchdog_override_enable
)
200 return s
->watchdog_override_usec
;
202 return s
->watchdog_original_usec
;
205 static void service_start_watchdog(Service
*s
) {
206 usec_t watchdog_usec
;
211 watchdog_usec
= service_get_watchdog_usec(s
);
212 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
213 service_stop_watchdog(s
);
217 if (s
->watchdog_event_source
) {
218 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
220 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
224 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
226 r
= sd_event_add_time(
227 UNIT(s
)->manager
->event
,
228 &s
->watchdog_event_source
,
230 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
231 service_dispatch_watchdog
, s
);
233 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
237 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
239 /* Let's process everything else which might be a sign
240 * of living before we consider a service died. */
241 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
244 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
247 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
253 /* Extends the specified event source timer to at least the specified time, unless it is already later
259 r
= sd_event_source_get_time(source
, ¤t
);
262 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
263 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
267 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
270 r
= sd_event_source_set_time(source
, extended
);
273 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
274 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
278 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
283 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
286 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
288 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
289 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
292 static void service_reset_watchdog(Service
*s
) {
295 dual_timestamp_get(&s
->watchdog_timestamp
);
296 service_start_watchdog(s
);
299 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
302 s
->watchdog_override_enable
= true;
303 s
->watchdog_override_usec
= watchdog_override_usec
;
304 service_reset_watchdog(s
);
306 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
307 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
310 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
316 assert(fs
->service
->n_fd_store
> 0);
317 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
318 fs
->service
->n_fd_store
--;
321 if (fs
->event_source
) {
322 sd_event_source_set_enabled(fs
->event_source
, SD_EVENT_OFF
);
323 sd_event_source_unref(fs
->event_source
);
331 static void service_release_fd_store(Service
*s
) {
334 if (s
->n_keep_fd_store
> 0)
337 log_unit_debug(UNIT(s
), "Releasing all stored fds");
339 service_fd_store_unlink(s
->fd_store
);
341 assert(s
->n_fd_store
== 0);
344 static void service_release_resources(Unit
*u
) {
345 Service
*s
= SERVICE(u
);
349 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
352 log_unit_debug(u
, "Releasing resources.");
354 s
->stdin_fd
= safe_close(s
->stdin_fd
);
355 s
->stdout_fd
= safe_close(s
->stdout_fd
);
356 s
->stderr_fd
= safe_close(s
->stderr_fd
);
358 service_release_fd_store(s
);
361 static void service_done(Unit
*u
) {
362 Service
*s
= SERVICE(u
);
366 s
->pid_file
= mfree(s
->pid_file
);
367 s
->status_text
= mfree(s
->status_text
);
369 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
370 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
371 s
->control_command
= NULL
;
372 s
->main_command
= NULL
;
374 dynamic_creds_unref(&s
->dynamic_creds
);
376 exit_status_set_free(&s
->restart_prevent_status
);
377 exit_status_set_free(&s
->restart_force_status
);
378 exit_status_set_free(&s
->success_status
);
380 /* This will leak a process, but at least no memory or any of
382 service_unwatch_main_pid(s
);
383 service_unwatch_control_pid(s
);
384 service_unwatch_pid_file(s
);
387 unit_unwatch_bus_name(u
, s
->bus_name
);
388 s
->bus_name
= mfree(s
->bus_name
);
391 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
393 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
394 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
396 service_close_socket_fd(s
);
397 s
->peer
= socket_peer_unref(s
->peer
);
399 unit_ref_unset(&s
->accept_socket
);
401 service_stop_watchdog(s
);
403 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
404 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
406 service_release_resources(u
);
409 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
410 ServiceFDStore
*fs
= userdata
;
415 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
416 log_unit_debug(UNIT(fs
->service
),
417 "Received %s on stored fd %d (%s), closing.",
418 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
419 fs
->fd
, strna(fs
->fdname
));
420 service_fd_store_unlink(fs
);
424 static int service_add_fd_store(Service
*s
, int fd
, const char *name
) {
428 /* fd is always consumed if we return >= 0 */
433 if (s
->n_fd_store
>= s
->n_fd_store_max
)
434 return -EXFULL
; /* Our store is full.
435 * Use this errno rather than E[NM]FILE to distinguish from
436 * the case where systemd itself hits the file limit. */
438 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
439 r
= same_fd(fs
->fd
, fd
);
444 return 0; /* fd already included */
448 fs
= new0(ServiceFDStore
, 1);
454 fs
->fdname
= strdup(name
?: "stored");
460 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
461 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
466 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
468 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
471 return 1; /* fd newly stored */
474 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
) {
479 while (fdset_size(fds
) > 0) {
480 _cleanup_close_
int fd
= -1;
482 fd
= fdset_steal_first(fds
);
486 r
= service_add_fd_store(s
, fd
, name
);
488 return log_unit_warning_errno(UNIT(s
), r
,
489 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
492 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
494 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
501 static void service_remove_fd_store(Service
*s
, const char *name
) {
502 ServiceFDStore
*fs
, *n
;
507 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
508 if (!streq(fs
->fdname
, name
))
511 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
512 service_fd_store_unlink(fs
);
516 static int service_arm_timer(Service
*s
, usec_t usec
) {
521 if (s
->timer_event_source
) {
522 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
526 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
529 if (usec
== USEC_INFINITY
)
532 r
= sd_event_add_time(
533 UNIT(s
)->manager
->event
,
534 &s
->timer_event_source
,
537 service_dispatch_timer
, s
);
541 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
546 static int service_verify(Service
*s
) {
549 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
552 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
553 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
554 /* FailureAction= only makes sense if one of the start or stop commands is specified.
555 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
556 * either a command or SuccessAction= are required. */
558 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
562 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
563 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
567 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
568 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
572 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
573 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
577 if (s
->type
== SERVICE_ONESHOT
&& s
->restart
!= SERVICE_RESTART_NO
) {
578 log_unit_error(UNIT(s
), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
582 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
583 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
587 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
588 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
592 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
593 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
595 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
596 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
600 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
601 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
603 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
604 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
606 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
607 log_unit_warning(UNIT(s
), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
612 static int service_add_default_dependencies(Service
*s
) {
617 if (!UNIT(s
)->default_dependencies
)
620 /* Add a number of automatic dependencies useful for the
621 * majority of services. */
623 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
624 /* First, pull in the really early boot stuff, and
625 * require it, so that we fail if we can't acquire
628 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
633 /* In the --user instance there's no sysinit.target,
634 * in that case require basic.target instead. */
636 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
641 /* Second, if the rest of the base system is in the same
642 * transaction, order us after it, but do not pull it in or
643 * even require it. */
644 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
648 /* Third, add us in for normal shutdown. */
649 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
652 static void service_fix_output(Service
*s
) {
655 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
656 * however, since in that case we want output to default to the same place as we read input from. */
658 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
659 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
660 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
661 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
663 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
664 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
665 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
667 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
668 s
->exec_context
.stdin_data_size
> 0)
669 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
672 static int service_setup_bus_name(Service
*s
) {
680 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
682 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
684 /* We always want to be ordered against dbus.socket if both are in the transaction. */
685 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, 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 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
691 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
693 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
698 static int service_add_extras(Service
*s
) {
703 if (s
->type
== _SERVICE_TYPE_INVALID
) {
704 /* Figure out a type automatically */
706 s
->type
= SERVICE_DBUS
;
707 else if (s
->exec_command
[SERVICE_EXEC_START
])
708 s
->type
= SERVICE_SIMPLE
;
710 s
->type
= SERVICE_ONESHOT
;
713 /* Oneshot services have disabled start timeout by default */
714 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
715 s
->timeout_start_usec
= USEC_INFINITY
;
717 service_fix_output(s
);
719 r
= unit_patch_contexts(UNIT(s
));
723 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
727 r
= unit_set_default_slice(UNIT(s
));
731 /* If the service needs the notify socket, let's enable it automatically. */
732 if (s
->notify_access
== NOTIFY_NONE
&&
733 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
734 s
->notify_access
= NOTIFY_MAIN
;
736 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
737 * delegation is on, in that case it we assume the payload knows better what to do and can process
738 * things in a more focussed way. */
739 if (s
->oom_policy
< 0)
740 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
742 /* Let the kernel do the killing if that's requested. */
743 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
745 r
= service_add_default_dependencies(s
);
749 r
= service_setup_bus_name(s
);
756 static int service_load(Unit
*u
) {
757 Service
*s
= SERVICE(u
);
762 /* Load a .service file */
763 r
= unit_load_fragment(u
);
767 /* Still nothing found? Then let's give up */
768 if (u
->load_state
== UNIT_STUB
)
771 /* This is a new unit? Then let's add in some extras */
772 if (u
->load_state
== UNIT_LOADED
) {
774 /* We were able to load something, then let's add in
775 * the dropin directories. */
776 r
= unit_load_dropin(u
);
780 /* This is a new unit? Then let's add in some
782 r
= service_add_extras(s
);
787 return service_verify(s
);
790 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
791 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
];
792 char buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
];
793 ServiceExecCommand c
;
794 Service
*s
= SERVICE(u
);
799 prefix
= strempty(prefix
);
800 prefix2
= strjoina(prefix
, "\t");
803 "%sService State: %s\n"
805 "%sReload Result: %s\n"
806 "%sPermissionsStartOnly: %s\n"
807 "%sRootDirectoryStartOnly: %s\n"
808 "%sRemainAfterExit: %s\n"
809 "%sGuessMainPID: %s\n"
812 "%sNotifyAccess: %s\n"
813 "%sNotifyState: %s\n"
815 prefix
, service_state_to_string(s
->state
),
816 prefix
, service_result_to_string(s
->result
),
817 prefix
, service_result_to_string(s
->reload_result
),
818 prefix
, yes_no(s
->permissions_start_only
),
819 prefix
, yes_no(s
->root_directory_start_only
),
820 prefix
, yes_no(s
->remain_after_exit
),
821 prefix
, yes_no(s
->guess_main_pid
),
822 prefix
, service_type_to_string(s
->type
),
823 prefix
, service_restart_to_string(s
->restart
),
824 prefix
, notify_access_to_string(s
->notify_access
),
825 prefix
, notify_state_to_string(s
->notify_state
),
826 prefix
, oom_policy_to_string(s
->oom_policy
));
828 if (s
->control_pid
> 0)
830 "%sControl PID: "PID_FMT
"\n",
831 prefix
, s
->control_pid
);
835 "%sMain PID: "PID_FMT
"\n"
836 "%sMain PID Known: %s\n"
837 "%sMain PID Alien: %s\n",
839 prefix
, yes_no(s
->main_pid_known
),
840 prefix
, yes_no(s
->main_pid_alien
));
845 prefix
, s
->pid_file
);
850 "%sBus Name Good: %s\n",
852 prefix
, yes_no(s
->bus_name_good
));
854 if (UNIT_ISSET(s
->accept_socket
))
856 "%sAccept Socket: %s\n",
857 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
861 "%sTimeoutStartSec: %s\n"
862 "%sTimeoutStopSec: %s\n"
863 "%sRuntimeMaxSec: %s\n"
864 "%sWatchdogSec: %s\n",
865 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
866 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
867 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
868 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
869 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
871 kill_context_dump(&s
->kill_context
, f
, prefix
);
872 exec_context_dump(&s
->exec_context
, f
, prefix
);
874 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
876 if (!s
->exec_command
[c
])
879 fprintf(f
, "%s-> %s:\n",
880 prefix
, service_exec_command_to_string(c
));
882 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
886 fprintf(f
, "%sStatus Text: %s\n",
887 prefix
, s
->status_text
);
889 if (s
->n_fd_store_max
> 0)
891 "%sFile Descriptor Store Max: %u\n"
892 "%sFile Descriptor Store Current: %zu\n",
893 prefix
, s
->n_fd_store_max
,
894 prefix
, s
->n_fd_store
);
896 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
899 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
903 assert(pid_is_valid(pid
));
905 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
906 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
909 if (pid
== getpid_cached() || pid
== 1) {
910 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
914 if (pid
== s
->control_pid
) {
915 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
919 if (!pid_is_alive(pid
)) {
920 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
924 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
925 if (owner
== UNIT(s
)) {
926 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
927 return 1; /* Yay, it's definitely a good PID */
930 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
933 static int service_load_pid_file(Service
*s
, bool may_warn
) {
934 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
935 bool questionable_pid_file
= false;
936 _cleanup_free_
char *k
= NULL
;
937 _cleanup_close_
int fd
= -1;
946 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
948 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
949 if (fd
== -ENOLINK
) {
950 log_unit_full(UNIT(s
), LOG_DEBUG
, fd
, "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
952 questionable_pid_file
= true;
954 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
957 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
));
959 /* 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. */
960 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
961 r
= read_one_line_file(procfs
, &k
);
963 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
);
965 r
= parse_pid(k
, &pid
);
967 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
969 if (s
->main_pid_known
&& pid
== s
->main_pid
)
972 r
= service_is_suitable_main_pid(s
, pid
, prio
);
978 if (questionable_pid_file
) {
979 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
983 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
985 if (fstat(fd
, &st
) < 0)
986 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
988 if (st
.st_uid
!= 0) {
989 log_unit_error(UNIT(s
), "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
993 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" does not belong to service, but we'll accept it since PID file is owned by root.", pid
);
996 if (s
->main_pid_known
) {
997 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
999 service_unwatch_main_pid(s
);
1000 s
->main_pid_known
= false;
1002 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1004 r
= service_set_main_pid(s
, pid
);
1008 r
= unit_watch_pid(UNIT(s
), pid
, false);
1009 if (r
< 0) /* FIXME: we need to do something here */
1010 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1015 static void service_search_main_pid(Service
*s
) {
1021 /* If we know it anyway, don't ever fallback to unreliable
1023 if (s
->main_pid_known
)
1026 if (!s
->guess_main_pid
)
1029 assert(s
->main_pid
<= 0);
1031 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1034 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1035 if (service_set_main_pid(s
, pid
) < 0)
1038 r
= unit_watch_pid(UNIT(s
), pid
, false);
1040 /* FIXME: we need to do something here */
1041 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1044 static void service_set_state(Service
*s
, ServiceState state
) {
1045 ServiceState old_state
;
1046 const UnitActiveState
*table
;
1050 if (s
->state
!= state
)
1051 bus_unit_send_pending_change_signal(UNIT(s
), false);
1053 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1055 old_state
= s
->state
;
1058 service_unwatch_pid_file(s
);
1061 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1064 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1065 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1066 SERVICE_AUTO_RESTART
))
1067 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1070 SERVICE_START
, SERVICE_START_POST
,
1071 SERVICE_RUNNING
, SERVICE_RELOAD
,
1072 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1073 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1074 service_unwatch_main_pid(s
);
1075 s
->main_command
= NULL
;
1079 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_unwatch_control_pid(s
);
1084 s
->control_command
= NULL
;
1085 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1088 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1089 unit_unwatch_all_pids(UNIT(s
));
1090 unit_dequeue_rewatch_pids(UNIT(s
));
1094 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1095 SERVICE_RUNNING
, SERVICE_RELOAD
,
1096 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1097 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1098 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1099 service_close_socket_fd(s
);
1101 if (state
!= SERVICE_START
)
1102 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1104 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1105 service_stop_watchdog(s
);
1107 /* For the inactive states unit_notify() will trim the cgroup,
1108 * but for exit we have to do that ourselves... */
1109 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1110 unit_prune_cgroup(UNIT(s
));
1112 if (old_state
!= state
)
1113 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1115 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1116 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1117 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1120 static usec_t
service_coldplug_timeout(Service
*s
) {
1123 switch (s
->deserialized_state
) {
1125 case SERVICE_START_PRE
:
1127 case SERVICE_START_POST
:
1128 case SERVICE_RELOAD
:
1129 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1131 case SERVICE_RUNNING
:
1132 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1135 case SERVICE_STOP_WATCHDOG
:
1136 case SERVICE_STOP_SIGTERM
:
1137 case SERVICE_STOP_SIGKILL
:
1138 case SERVICE_STOP_POST
:
1139 case SERVICE_FINAL_SIGTERM
:
1140 case SERVICE_FINAL_SIGKILL
:
1141 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1143 case SERVICE_AUTO_RESTART
:
1144 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1147 return USEC_INFINITY
;
1151 static int service_coldplug(Unit
*u
) {
1152 Service
*s
= SERVICE(u
);
1156 assert(s
->state
== SERVICE_DEAD
);
1158 if (s
->deserialized_state
== s
->state
)
1161 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1165 if (s
->main_pid
> 0 &&
1166 pid_is_unwaited(s
->main_pid
) &&
1167 (IN_SET(s
->deserialized_state
,
1168 SERVICE_START
, SERVICE_START_POST
,
1169 SERVICE_RUNNING
, SERVICE_RELOAD
,
1170 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1171 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1172 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1177 if (s
->control_pid
> 0 &&
1178 pid_is_unwaited(s
->control_pid
) &&
1179 IN_SET(s
->deserialized_state
,
1180 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1182 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1183 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1184 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1189 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1190 (void) unit_enqueue_rewatch_pids(u
);
1191 (void) unit_setup_dynamic_creds(u
);
1192 (void) unit_setup_exec_runtime(u
);
1195 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1196 service_start_watchdog(s
);
1198 if (UNIT_ISSET(s
->accept_socket
)) {
1199 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1201 if (socket
->max_connections_per_source
> 0) {
1204 /* Make a best-effort attempt at bumping the connection count */
1205 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1206 socket_peer_unref(s
->peer
);
1212 service_set_state(s
, s
->deserialized_state
);
1216 static int service_collect_fds(
1220 size_t *n_socket_fds
,
1221 size_t *n_storage_fds
) {
1223 _cleanup_strv_free_
char **rfd_names
= NULL
;
1224 _cleanup_free_
int *rfds
= NULL
;
1225 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1231 assert(n_socket_fds
);
1232 assert(n_storage_fds
);
1234 if (s
->socket_fd
>= 0) {
1236 /* Pass the per-connection socket */
1241 rfds
[0] = s
->socket_fd
;
1243 rfd_names
= strv_new("connection");
1253 /* Pass all our configured sockets for singleton services */
1255 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1256 _cleanup_free_
int *cfds
= NULL
;
1260 if (u
->type
!= UNIT_SOCKET
)
1265 cn_fds
= socket_collect_fds(sock
, &cfds
);
1273 rfds
= TAKE_PTR(cfds
);
1274 rn_socket_fds
= cn_fds
;
1278 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1282 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1285 rn_socket_fds
+= cn_fds
;
1288 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1294 if (s
->n_fd_store
> 0) {
1300 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1306 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1311 n_fds
= rn_socket_fds
;
1313 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1314 rfds
[n_fds
] = fs
->fd
;
1315 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1316 if (!rfd_names
[n_fds
])
1323 rfd_names
[n_fds
] = NULL
;
1326 *fds
= TAKE_PTR(rfds
);
1327 *fd_names
= TAKE_PTR(rfd_names
);
1328 *n_socket_fds
= rn_socket_fds
;
1329 *n_storage_fds
= rn_storage_fds
;
1334 static int service_allocate_exec_fd_event_source(
1337 sd_event_source
**ret_event_source
) {
1339 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1344 assert(ret_event_source
);
1346 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1348 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1350 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1352 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1354 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1356 (void) sd_event_source_set_description(source
, "service event_fd");
1358 r
= sd_event_source_set_io_fd_own(source
, true);
1360 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1362 *ret_event_source
= TAKE_PTR(source
);
1366 static int service_allocate_exec_fd(
1368 sd_event_source
**ret_event_source
,
1371 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1375 assert(ret_event_source
);
1376 assert(ret_exec_fd
);
1378 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1379 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1381 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1386 *ret_exec_fd
= TAKE_FD(p
[1]);
1391 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1394 /* Notifications are accepted depending on the process and
1395 * the access setting of the service:
1396 * process: \ access: NONE MAIN EXEC ALL
1397 * main no yes yes yes
1398 * control no no yes yes
1399 * other (forked) no no no yes */
1401 if (flags
& EXEC_IS_CONTROL
)
1402 /* A control process */
1403 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1405 /* We only spawn main processes and control processes, so any
1406 * process that is not a control process is a main process */
1407 return s
->notify_access
!= NOTIFY_NONE
;
1410 static int service_spawn(
1417 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1424 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1425 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1426 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1427 _cleanup_close_
int exec_fd
= -1;
1428 _cleanup_free_
int *fds
= NULL
;
1436 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1440 if (flags
& EXEC_IS_CONTROL
) {
1441 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1442 if (s
->permissions_start_only
)
1443 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1444 if (s
->root_directory_start_only
)
1445 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1448 if ((flags
& EXEC_PASS_FDS
) ||
1449 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1450 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1451 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1453 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1457 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1460 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1461 assert(!s
->exec_fd_event_source
);
1463 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1468 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1472 our_env
= new0(char*, 10);
1476 if (service_exec_needs_notify_socket(s
, flags
))
1477 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1480 if (s
->main_pid
> 0)
1481 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1484 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1485 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1489 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1492 if (s
->socket_fd
>= 0) {
1493 union sockaddr_union sa
;
1494 socklen_t salen
= sizeof(sa
);
1496 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1497 * useful. Note that we do this only when we are still connected at this point in time, which we might
1498 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1499 * in ENOTCONN), and just use whate we can use. */
1501 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1502 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1504 _cleanup_free_
char *addr
= NULL
;
1508 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1512 t
= strappend("REMOTE_ADDR=", addr
);
1515 our_env
[n_env
++] = t
;
1517 r
= sockaddr_port(&sa
.sa
, &port
);
1521 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1523 our_env
[n_env
++] = t
;
1527 if (flags
& EXEC_SETENV_RESULT
) {
1528 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1531 if (s
->main_exec_status
.pid
> 0 &&
1532 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1533 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1536 if (s
->main_exec_status
.code
== CLD_EXITED
)
1537 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1539 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1545 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1549 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1553 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1554 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1555 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1557 strv_free_and_replace(exec_params
.environment
, final_env
);
1558 exec_params
.fds
= fds
;
1559 exec_params
.fd_names
= fd_names
;
1560 exec_params
.n_socket_fds
= n_socket_fds
;
1561 exec_params
.n_storage_fds
= n_storage_fds
;
1562 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1563 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1564 if (s
->type
== SERVICE_IDLE
)
1565 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1566 exec_params
.stdin_fd
= s
->stdin_fd
;
1567 exec_params
.stdout_fd
= s
->stdout_fd
;
1568 exec_params
.stderr_fd
= s
->stderr_fd
;
1569 exec_params
.exec_fd
= exec_fd
;
1571 r
= exec_spawn(UNIT(s
),
1581 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1582 s
->exec_fd_hot
= false;
1584 r
= unit_watch_pid(UNIT(s
), pid
, true);
1593 static int main_pid_good(Service
*s
) {
1596 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1598 /* If we know the pid file, then let's just check if it is
1600 if (s
->main_pid_known
) {
1602 /* If it's an alien child let's check if it is still
1604 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1605 return pid_is_alive(s
->main_pid
);
1607 /* .. otherwise assume we'll get a SIGCHLD for it,
1608 * which we really should wait for to collect exit
1609 * status and code */
1610 return s
->main_pid
> 0;
1613 /* We don't know the pid */
1617 static int control_pid_good(Service
*s
) {
1620 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1621 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1622 * means: we can't figure it out. */
1624 return s
->control_pid
> 0;
1627 static int cgroup_good(Service
*s
) {
1632 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1635 if (!UNIT(s
)->cgroup_path
)
1638 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1645 static bool service_shall_restart(Service
*s
) {
1648 /* Don't restart after manual stops */
1649 if (s
->forbid_restart
)
1652 /* Never restart if this is configured as special exception */
1653 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1656 /* Restart if the exit code/status are configured as restart triggers */
1657 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1660 switch (s
->restart
) {
1662 case SERVICE_RESTART_NO
:
1665 case SERVICE_RESTART_ALWAYS
:
1668 case SERVICE_RESTART_ON_SUCCESS
:
1669 return s
->result
== SERVICE_SUCCESS
;
1671 case SERVICE_RESTART_ON_FAILURE
:
1672 return s
->result
!= SERVICE_SUCCESS
;
1674 case SERVICE_RESTART_ON_ABNORMAL
:
1675 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1677 case SERVICE_RESTART_ON_WATCHDOG
:
1678 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1680 case SERVICE_RESTART_ON_ABORT
:
1681 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1684 assert_not_reached("unknown restart setting");
1688 static bool service_will_restart(Unit
*u
) {
1689 Service
*s
= SERVICE(u
);
1693 if (s
->will_auto_restart
)
1695 if (s
->state
== SERVICE_AUTO_RESTART
)
1699 if (UNIT(s
)->job
->type
== JOB_START
)
1705 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1710 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1711 * undo what has already been enqueued. */
1712 if (unit_stop_pending(UNIT(s
)))
1713 allow_restart
= false;
1715 if (s
->result
== SERVICE_SUCCESS
)
1718 unit_log_result(UNIT(s
), s
->result
== SERVICE_SUCCESS
, service_result_to_string(s
->result
));
1720 if (allow_restart
&& service_shall_restart(s
))
1721 s
->will_auto_restart
= true;
1723 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1724 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1725 s
->n_keep_fd_store
++;
1727 service_set_state(s
, s
->result
!= SERVICE_SUCCESS
? SERVICE_FAILED
: SERVICE_DEAD
);
1729 if (s
->will_auto_restart
) {
1730 s
->will_auto_restart
= false;
1732 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1734 s
->n_keep_fd_store
--;
1738 service_set_state(s
, SERVICE_AUTO_RESTART
);
1740 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1741 * user can still introspect the counter. Do so on the next start. */
1742 s
->flush_n_restarts
= true;
1744 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1745 * queue, so that the fd store is possibly gc'ed again */
1746 s
->n_keep_fd_store
--;
1747 unit_add_to_gc_queue(UNIT(s
));
1749 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1750 s
->forbid_restart
= false;
1752 /* We want fresh tmpdirs in case service is started again immediately */
1753 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1755 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1756 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1757 /* Also, remove the runtime directory */
1758 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1760 /* Get rid of the IPC bits of the user */
1761 unit_unref_uid_gid(UNIT(s
), true);
1763 /* Release the user, and destroy it if we are the only remaining owner */
1764 dynamic_creds_destroy(&s
->dynamic_creds
);
1766 /* Try to delete the pid file. At this point it will be
1767 * out-of-date, and some software might be confused by it, so
1768 * let's remove it. */
1770 (void) unlink(s
->pid_file
);
1772 /* Reset TTY ownership if necessary */
1773 exec_context_revert_tty(&s
->exec_context
);
1778 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1779 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1782 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1786 if (s
->result
== SERVICE_SUCCESS
)
1789 service_unwatch_control_pid(s
);
1790 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1792 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1793 if (s
->control_command
) {
1794 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1796 r
= service_spawn(s
,
1798 s
->timeout_stop_usec
,
1799 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1804 service_set_state(s
, SERVICE_STOP_POST
);
1806 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1811 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1812 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1815 static int state_to_kill_operation(ServiceState state
) {
1818 case SERVICE_STOP_WATCHDOG
:
1819 return KILL_WATCHDOG
;
1821 case SERVICE_STOP_SIGTERM
:
1822 case SERVICE_FINAL_SIGTERM
:
1823 return KILL_TERMINATE
;
1825 case SERVICE_STOP_SIGKILL
:
1826 case SERVICE_FINAL_SIGKILL
:
1830 return _KILL_OPERATION_INVALID
;
1834 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1839 if (s
->result
== SERVICE_SUCCESS
)
1842 /* Before sending any signal, make sure we track all members of this cgroup */
1843 (void) unit_watch_all_pids(UNIT(s
));
1845 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1847 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1849 r
= unit_kill_context(
1852 state_to_kill_operation(state
),
1860 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1864 service_set_state(s
, state
);
1865 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1866 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1867 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1868 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1869 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1870 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1872 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1877 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1879 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1880 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1882 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1885 static void service_enter_stop_by_notify(Service
*s
) {
1888 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1890 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1892 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1893 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1896 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1901 if (s
->result
== SERVICE_SUCCESS
)
1904 service_unwatch_control_pid(s
);
1905 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1907 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1908 if (s
->control_command
) {
1909 s
->control_command_id
= SERVICE_EXEC_STOP
;
1911 r
= service_spawn(s
,
1913 s
->timeout_stop_usec
,
1914 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1919 service_set_state(s
, SERVICE_STOP
);
1921 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1926 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1927 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1930 static bool service_good(Service
*s
) {
1934 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1937 main_pid_ok
= main_pid_good(s
);
1938 if (main_pid_ok
> 0) /* It's alive */
1940 if (main_pid_ok
== 0) /* It's dead */
1943 /* OK, we don't know anything about the main PID, maybe
1944 * because there is none. Let's check the control group
1947 return cgroup_good(s
) != 0;
1950 static void service_enter_running(Service
*s
, ServiceResult f
) {
1953 if (s
->result
== SERVICE_SUCCESS
)
1956 service_unwatch_control_pid(s
);
1958 if (s
->result
!= SERVICE_SUCCESS
)
1959 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1960 else if (service_good(s
)) {
1962 /* If there are any queued up sd_notify() notifications, process them now */
1963 if (s
->notify_state
== NOTIFY_RELOADING
)
1964 service_enter_reload_by_notify(s
);
1965 else if (s
->notify_state
== NOTIFY_STOPPING
)
1966 service_enter_stop_by_notify(s
);
1968 service_set_state(s
, SERVICE_RUNNING
);
1969 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
1972 } else if (s
->remain_after_exit
)
1973 service_set_state(s
, SERVICE_EXITED
);
1975 service_enter_stop(s
, SERVICE_SUCCESS
);
1978 static void service_enter_start_post(Service
*s
) {
1982 service_unwatch_control_pid(s
);
1983 service_reset_watchdog(s
);
1985 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
1986 if (s
->control_command
) {
1987 s
->control_command_id
= SERVICE_EXEC_START_POST
;
1989 r
= service_spawn(s
,
1991 s
->timeout_start_usec
,
1992 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
1997 service_set_state(s
, SERVICE_START_POST
);
1999 service_enter_running(s
, SERVICE_SUCCESS
);
2004 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2005 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2008 static void service_kill_control_process(Service
*s
) {
2013 if (s
->control_pid
<= 0)
2016 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2018 _cleanup_free_
char *comm
= NULL
;
2020 (void) get_process_comm(s
->control_pid
, &comm
);
2022 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2023 s
->control_pid
, strna(comm
));
2027 static int service_adverse_to_leftover_processes(Service
*s
) {
2030 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2031 * SendSIGKILL is used for services that require a clean shutdown. These are typically database
2032 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or
2033 * startup time is quite variable (so Timeout settings aren't of use).
2035 * Here we take these two factors and refuse to start a service if there are existing processes
2036 * within a control group. Databases, while generally having some protection against multiple
2037 * instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service
2038 * aren't as rigoriously written to protect aganst against multiple use. */
2039 if (unit_warn_leftover_processes(UNIT(s
)) &&
2040 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2041 !s
->kill_context
.send_sigkill
) {
2042 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
), "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2047 static void service_enter_start(Service
*s
) {
2055 service_unwatch_control_pid(s
);
2056 service_unwatch_main_pid(s
);
2058 r
= service_adverse_to_leftover_processes(s
);
2062 if (s
->type
== SERVICE_FORKING
) {
2063 s
->control_command_id
= SERVICE_EXEC_START
;
2064 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2066 s
->main_command
= NULL
;
2068 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2069 s
->control_command
= NULL
;
2071 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2075 if (s
->type
!= SERVICE_ONESHOT
) {
2076 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2077 * happen if the configuration changes at runtime. In this case, let's enter a failure
2079 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2084 /* We force a fake state transition here. Otherwise, the unit would go directly from
2085 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2086 * inbetween. This way we can later trigger actions that depend on the state
2087 * transition, including SuccessAction=. */
2088 service_set_state(s
, SERVICE_START
);
2090 service_enter_start_post(s
);
2094 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2095 /* For simple + idle this is the main process. We don't apply any timeout here, but
2096 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2097 timeout
= USEC_INFINITY
;
2099 timeout
= s
->timeout_start_usec
;
2101 r
= service_spawn(s
,
2104 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2109 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2110 /* For simple services we immediately start
2111 * the START_POST binaries. */
2113 service_set_main_pid(s
, pid
);
2114 service_enter_start_post(s
);
2116 } else if (s
->type
== SERVICE_FORKING
) {
2118 /* For forking services we wait until the start
2119 * process exited. */
2121 s
->control_pid
= pid
;
2122 service_set_state(s
, SERVICE_START
);
2124 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2126 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2128 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2129 * bus. 'notify' and 'exec' services are similar. */
2131 service_set_main_pid(s
, pid
);
2132 service_set_state(s
, SERVICE_START
);
2134 assert_not_reached("Unknown service type");
2139 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2140 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2143 static void service_enter_start_pre(Service
*s
) {
2148 service_unwatch_control_pid(s
);
2150 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2151 if (s
->control_command
) {
2153 r
= service_adverse_to_leftover_processes(s
);
2157 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2159 r
= service_spawn(s
,
2161 s
->timeout_start_usec
,
2162 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2167 service_set_state(s
, SERVICE_START_PRE
);
2169 service_enter_start(s
);
2174 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2175 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2178 static void service_enter_restart(Service
*s
) {
2179 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2184 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2185 /* Don't restart things if we are going down anyway */
2186 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2188 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2195 /* Any units that are bound to this service must also be
2196 * restarted. We use JOB_RESTART (instead of the more obvious
2197 * JOB_START) here so that those dependency jobs will be added
2199 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2203 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2204 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2205 * explicitly however via the usual "systemctl reset-failure" logic. */
2207 s
->flush_n_restarts
= false;
2209 log_struct(LOG_INFO
,
2210 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2211 LOG_UNIT_ID(UNIT(s
)),
2212 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2213 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2214 "N_RESTARTS=%u", s
->n_restarts
);
2216 /* Notify clients about changed restart counter */
2217 unit_add_to_dbus_queue(UNIT(s
));
2219 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2220 * it will be canceled as part of the service_stop() call that
2221 * is executed as part of JOB_RESTART. */
2226 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2227 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2230 static void service_enter_reload_by_notify(Service
*s
) {
2231 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2236 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2237 service_set_state(s
, SERVICE_RELOAD
);
2239 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2240 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2242 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2245 static void service_enter_reload(Service
*s
) {
2250 service_unwatch_control_pid(s
);
2251 s
->reload_result
= SERVICE_SUCCESS
;
2253 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2254 if (s
->control_command
) {
2255 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2257 r
= service_spawn(s
,
2259 s
->timeout_start_usec
,
2260 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2265 service_set_state(s
, SERVICE_RELOAD
);
2267 service_enter_running(s
, SERVICE_SUCCESS
);
2272 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2273 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2274 service_enter_running(s
, SERVICE_SUCCESS
);
2277 static void service_run_next_control(Service
*s
) {
2282 assert(s
->control_command
);
2283 assert(s
->control_command
->command_next
);
2285 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2287 s
->control_command
= s
->control_command
->command_next
;
2288 service_unwatch_control_pid(s
);
2290 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2291 timeout
= s
->timeout_start_usec
;
2293 timeout
= s
->timeout_stop_usec
;
2295 r
= service_spawn(s
,
2298 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2299 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2300 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2301 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2309 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2311 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2312 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2313 else if (s
->state
== SERVICE_STOP_POST
)
2314 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2315 else if (s
->state
== SERVICE_RELOAD
) {
2316 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2317 service_enter_running(s
, SERVICE_SUCCESS
);
2319 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2322 static void service_run_next_main(Service
*s
) {
2327 assert(s
->main_command
);
2328 assert(s
->main_command
->command_next
);
2329 assert(s
->type
== SERVICE_ONESHOT
);
2331 s
->main_command
= s
->main_command
->command_next
;
2332 service_unwatch_main_pid(s
);
2334 r
= service_spawn(s
,
2336 s
->timeout_start_usec
,
2337 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2342 service_set_main_pid(s
, pid
);
2347 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2348 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2351 static int service_start(Unit
*u
) {
2352 Service
*s
= SERVICE(u
);
2357 /* We cannot fulfill this request right now, try again later
2359 if (IN_SET(s
->state
,
2360 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2361 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2364 /* Already on it! */
2365 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2368 /* A service that will be restarted must be stopped first to
2369 * trigger BindsTo and/or OnFailure dependencies. If a user
2370 * does not want to wait for the holdoff time to elapse, the
2371 * service should be manually restarted, not started. We
2372 * simply return EAGAIN here, so that any start jobs stay
2373 * queued, and assume that the auto restart timer will
2374 * eventually trigger the restart. */
2375 if (s
->state
== SERVICE_AUTO_RESTART
)
2378 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2380 /* Make sure we don't enter a busy loop of some kind. */
2381 r
= unit_test_start_limit(u
);
2383 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2387 r
= unit_acquire_invocation_id(u
);
2391 s
->result
= SERVICE_SUCCESS
;
2392 s
->reload_result
= SERVICE_SUCCESS
;
2393 s
->main_pid_known
= false;
2394 s
->main_pid_alien
= false;
2395 s
->forbid_restart
= false;
2397 s
->status_text
= mfree(s
->status_text
);
2398 s
->status_errno
= 0;
2400 s
->notify_state
= NOTIFY_UNKNOWN
;
2402 s
->watchdog_original_usec
= s
->watchdog_usec
;
2403 s
->watchdog_override_enable
= false;
2404 s
->watchdog_override_usec
= USEC_INFINITY
;
2406 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2407 exec_status_reset(&s
->main_exec_status
);
2409 /* This is not an automatic restart? Flush the restart counter then */
2410 if (s
->flush_n_restarts
) {
2412 s
->flush_n_restarts
= false;
2415 u
->reset_accounting
= true;
2417 service_enter_start_pre(s
);
2421 static int service_stop(Unit
*u
) {
2422 Service
*s
= SERVICE(u
);
2426 /* Don't create restart jobs from manual stops. */
2427 s
->forbid_restart
= true;
2430 if (IN_SET(s
->state
,
2431 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2432 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2435 /* A restart will be scheduled or is in progress. */
2436 if (s
->state
== SERVICE_AUTO_RESTART
) {
2437 service_set_state(s
, SERVICE_DEAD
);
2441 /* If there's already something running we go directly into
2443 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
)) {
2444 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2448 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2450 service_enter_stop(s
, SERVICE_SUCCESS
);
2454 static int service_reload(Unit
*u
) {
2455 Service
*s
= SERVICE(u
);
2459 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2461 service_enter_reload(s
);
2465 _pure_
static bool service_can_reload(Unit
*u
) {
2466 Service
*s
= SERVICE(u
);
2470 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2473 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2474 Service
*s
= SERVICE(u
);
2476 ExecCommand
*first
, *c
;
2480 first
= s
->exec_command
[id
];
2482 /* Figure out where we are in the list by walking back to the beginning */
2483 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2489 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2490 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2491 size_t allocated
= 0, length
= 0;
2492 Service
*s
= SERVICE(u
);
2493 const char *type
, *key
;
2494 ServiceExecCommand id
;
2504 if (command
== s
->control_command
) {
2506 id
= s
->control_command_id
;
2509 id
= SERVICE_EXEC_START
;
2512 idx
= service_exec_command_index(u
, id
, command
);
2514 STRV_FOREACH(arg
, command
->argv
) {
2515 _cleanup_free_
char *e
= NULL
;
2523 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1 + n
+ 1))
2527 args
[length
++] = ' ';
2529 memcpy(args
+ length
, e
, n
);
2533 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2538 p
= cescape(command
->path
);
2542 key
= strjoina(type
, "-command");
2543 return serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2546 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2547 Service
*s
= SERVICE(u
);
2555 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2556 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2557 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2559 if (s
->control_pid
> 0)
2560 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2562 if (s
->main_pid_known
&& s
->main_pid
> 0)
2563 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2565 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2566 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2567 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2569 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2570 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2572 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2576 service_serialize_exec_command(u
, f
, s
->control_command
);
2577 service_serialize_exec_command(u
, f
, s
->main_command
);
2579 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2582 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2585 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2589 if (s
->exec_fd_event_source
) {
2590 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2594 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2597 if (UNIT_ISSET(s
->accept_socket
)) {
2598 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2603 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2607 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2608 _cleanup_free_
char *c
= NULL
;
2611 copy
= fdset_put_dup(fds
, fs
->fd
);
2613 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2615 c
= cescape(fs
->fdname
);
2619 (void) serialize_item_format(f
, "fd-store-fd", "%i %s", copy
, c
);
2622 if (s
->main_exec_status
.pid
> 0) {
2623 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2624 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2625 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2627 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2628 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2629 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2633 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2634 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2636 if (s
->watchdog_override_enable
)
2637 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2639 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2640 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2645 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2646 Service
*s
= SERVICE(u
);
2648 unsigned idx
= 0, i
;
2649 bool control
, found
= false;
2650 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2651 ExecCommand
*command
= NULL
;
2652 _cleanup_free_
char *path
= NULL
;
2653 _cleanup_strv_free_
char **argv
= NULL
;
2655 enum ExecCommandState
{
2656 STATE_EXEC_COMMAND_TYPE
,
2657 STATE_EXEC_COMMAND_INDEX
,
2658 STATE_EXEC_COMMAND_PATH
,
2659 STATE_EXEC_COMMAND_ARGS
,
2660 _STATE_EXEC_COMMAND_MAX
,
2661 _STATE_EXEC_COMMAND_INVALID
= -1,
2668 control
= streq(key
, "control-command");
2670 state
= STATE_EXEC_COMMAND_TYPE
;
2673 _cleanup_free_
char *arg
= NULL
;
2675 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
);
2682 case STATE_EXEC_COMMAND_TYPE
:
2683 id
= service_exec_command_from_string(arg
);
2687 state
= STATE_EXEC_COMMAND_INDEX
;
2689 case STATE_EXEC_COMMAND_INDEX
:
2690 r
= safe_atou(arg
, &idx
);
2694 state
= STATE_EXEC_COMMAND_PATH
;
2696 case STATE_EXEC_COMMAND_PATH
:
2697 path
= TAKE_PTR(arg
);
2698 state
= STATE_EXEC_COMMAND_ARGS
;
2700 if (!path_is_absolute(path
))
2703 case STATE_EXEC_COMMAND_ARGS
:
2704 r
= strv_extend(&argv
, arg
);
2709 assert_not_reached("Unknown error at deserialization of exec command");
2714 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2717 /* Let's check whether exec command on given offset matches data that we just deserialized */
2718 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2722 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2727 /* Command at the index we serialized is different, let's look for command that exactly
2728 * matches but is on different index. If there is no such command we will not resume execution. */
2729 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2730 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2734 if (command
&& control
)
2735 s
->control_command
= command
;
2737 s
->main_command
= command
;
2739 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2744 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2745 Service
*s
= SERVICE(u
);
2753 if (streq(key
, "state")) {
2756 state
= service_state_from_string(value
);
2758 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2760 s
->deserialized_state
= state
;
2761 } else if (streq(key
, "result")) {
2764 f
= service_result_from_string(value
);
2766 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2767 else if (f
!= SERVICE_SUCCESS
)
2770 } else if (streq(key
, "reload-result")) {
2773 f
= service_result_from_string(value
);
2775 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2776 else if (f
!= SERVICE_SUCCESS
)
2777 s
->reload_result
= f
;
2779 } else if (streq(key
, "control-pid")) {
2782 if (parse_pid(value
, &pid
) < 0)
2783 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2785 s
->control_pid
= pid
;
2786 } else if (streq(key
, "main-pid")) {
2789 if (parse_pid(value
, &pid
) < 0)
2790 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2792 (void) service_set_main_pid(s
, pid
);
2793 } else if (streq(key
, "main-pid-known")) {
2796 b
= parse_boolean(value
);
2798 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2800 s
->main_pid_known
= b
;
2801 } else if (streq(key
, "bus-name-good")) {
2804 b
= parse_boolean(value
);
2806 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2808 s
->bus_name_good
= b
;
2809 } else if (streq(key
, "bus-name-owner")) {
2810 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2812 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2813 } else if (streq(key
, "status-text")) {
2816 r
= cunescape(value
, 0, &t
);
2818 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2820 free_and_replace(s
->status_text
, t
);
2822 } else if (streq(key
, "accept-socket")) {
2825 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2827 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2829 unit_ref_set(&s
->accept_socket
, u
, socket
);
2830 SOCKET(socket
)->n_connections
++;
2833 } else if (streq(key
, "socket-fd")) {
2836 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2837 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2839 asynchronous_close(s
->socket_fd
);
2840 s
->socket_fd
= fdset_remove(fds
, fd
);
2842 } else if (streq(key
, "fd-store-fd")) {
2847 pf
= strcspn(value
, WHITESPACE
);
2848 fdv
= strndupa(value
, pf
);
2850 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2851 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2853 _cleanup_free_
char *t
= NULL
;
2857 fdn
+= strspn(fdn
, WHITESPACE
);
2858 (void) cunescape(fdn
, 0, &t
);
2860 r
= service_add_fd_store(s
, fd
, t
);
2862 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2864 fdset_remove(fds
, fd
);
2867 } else if (streq(key
, "main-exec-status-pid")) {
2870 if (parse_pid(value
, &pid
) < 0)
2871 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2873 s
->main_exec_status
.pid
= pid
;
2874 } else if (streq(key
, "main-exec-status-code")) {
2877 if (safe_atoi(value
, &i
) < 0)
2878 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2880 s
->main_exec_status
.code
= i
;
2881 } else if (streq(key
, "main-exec-status-status")) {
2884 if (safe_atoi(value
, &i
) < 0)
2885 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2887 s
->main_exec_status
.status
= i
;
2888 } else if (streq(key
, "main-exec-status-start"))
2889 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2890 else if (streq(key
, "main-exec-status-exit"))
2891 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2892 else if (streq(key
, "watchdog-timestamp"))
2893 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2894 else if (streq(key
, "forbid-restart")) {
2897 b
= parse_boolean(value
);
2899 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2901 s
->forbid_restart
= b
;
2902 } else if (streq(key
, "stdin-fd")) {
2905 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2906 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2908 asynchronous_close(s
->stdin_fd
);
2909 s
->stdin_fd
= fdset_remove(fds
, fd
);
2910 s
->exec_context
.stdio_as_fds
= true;
2912 } else if (streq(key
, "stdout-fd")) {
2915 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2916 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
2918 asynchronous_close(s
->stdout_fd
);
2919 s
->stdout_fd
= fdset_remove(fds
, fd
);
2920 s
->exec_context
.stdio_as_fds
= true;
2922 } else if (streq(key
, "stderr-fd")) {
2925 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2926 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
2928 asynchronous_close(s
->stderr_fd
);
2929 s
->stderr_fd
= fdset_remove(fds
, fd
);
2930 s
->exec_context
.stdio_as_fds
= true;
2932 } else if (streq(key
, "exec-fd")) {
2935 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2936 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
2938 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
2940 fd
= fdset_remove(fds
, fd
);
2941 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
2944 } else if (streq(key
, "watchdog-override-usec")) {
2945 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
2946 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
2948 s
->watchdog_override_enable
= true;
2950 } else if (streq(key
, "watchdog-original-usec")) {
2951 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
2952 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
2954 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
2955 r
= service_deserialize_exec_command(u
, key
, value
);
2957 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
2959 } else if (streq(key
, "n-restarts")) {
2960 r
= safe_atou(value
, &s
->n_restarts
);
2962 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
2964 } else if (streq(key
, "flush-n-restarts")) {
2965 r
= parse_boolean(value
);
2967 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
2969 s
->flush_n_restarts
= r
;
2971 log_unit_debug(u
, "Unknown serialization key: %s", key
);
2976 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
2977 const UnitActiveState
*table
;
2981 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
2983 return table
[SERVICE(u
)->state
];
2986 static const char *service_sub_state_to_string(Unit
*u
) {
2989 return service_state_to_string(SERVICE(u
)->state
);
2992 static bool service_may_gc(Unit
*u
) {
2993 Service
*s
= SERVICE(u
);
2997 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2998 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2999 * have moved outside of the cgroup. */
3001 if (main_pid_good(s
) > 0 ||
3002 control_pid_good(s
) > 0)
3008 static int service_retry_pid_file(Service
*s
) {
3011 assert(s
->pid_file
);
3012 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3014 r
= service_load_pid_file(s
, false);
3018 service_unwatch_pid_file(s
);
3020 service_enter_running(s
, SERVICE_SUCCESS
);
3024 static int service_watch_pid_file(Service
*s
) {
3027 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3029 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3033 /* the pidfile might have appeared just before we set the watch */
3034 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3035 service_retry_pid_file(s
);
3039 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3040 service_unwatch_pid_file(s
);
3044 static int service_demand_pid_file(Service
*s
) {
3047 assert(s
->pid_file
);
3048 assert(!s
->pid_file_pathspec
);
3050 ps
= new0(PathSpec
, 1);
3055 ps
->path
= strdup(s
->pid_file
);
3061 path_simplify(ps
->path
, false);
3063 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3064 * keep their PID file open all the time. */
3065 ps
->type
= PATH_MODIFIED
;
3066 ps
->inotify_fd
= -1;
3068 s
->pid_file_pathspec
= ps
;
3070 return service_watch_pid_file(s
);
3073 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3074 PathSpec
*p
= userdata
;
3079 s
= SERVICE(p
->unit
);
3083 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3084 assert(s
->pid_file_pathspec
);
3085 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3087 log_unit_debug(UNIT(s
), "inotify event");
3089 if (path_spec_fd_event(p
, events
) < 0)
3092 if (service_retry_pid_file(s
) == 0)
3095 if (service_watch_pid_file(s
) < 0)
3101 service_unwatch_pid_file(s
);
3102 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3106 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3107 Service
*s
= SERVICE(userdata
);
3111 log_unit_debug(UNIT(s
), "got exec-fd event");
3113 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3114 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3115 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3116 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3117 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3118 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3119 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3120 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3126 n
= read(fd
, &x
, sizeof(x
));
3128 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3131 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3133 if (n
== 0) { /* EOF → the event we are waiting for */
3135 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3137 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3138 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3140 s
->exec_fd_hot
= false;
3142 /* Nice! This is what we have been waiting for. Transition to next state. */
3143 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3144 service_enter_start_post(s
);
3146 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3151 /* A byte was read → this turns on/off the exec fd logic */
3152 assert(n
== sizeof(x
));
3159 static void service_notify_cgroup_empty_event(Unit
*u
) {
3160 Service
*s
= SERVICE(u
);
3164 log_unit_debug(u
, "Control group is empty.");
3168 /* Waiting for SIGCHLD is usually more interesting,
3169 * because it includes return codes/signals. Which is
3170 * why we ignore the cgroup events for most cases,
3171 * except when we don't know pid which to expect the
3175 if (s
->type
== SERVICE_NOTIFY
&&
3176 main_pid_good(s
) == 0 &&
3177 control_pid_good(s
) == 0) {
3178 /* No chance of getting a ready notification anymore */
3179 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3184 case SERVICE_START_POST
:
3185 if (s
->pid_file_pathspec
&&
3186 main_pid_good(s
) == 0 &&
3187 control_pid_good(s
) == 0) {
3189 /* Give up hoping for the daemon to write its PID file */
3190 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3192 service_unwatch_pid_file(s
);
3193 if (s
->state
== SERVICE_START
)
3194 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3196 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3200 case SERVICE_RUNNING
:
3201 /* service_enter_running() will figure out what to do */
3202 service_enter_running(s
, SERVICE_SUCCESS
);
3205 case SERVICE_STOP_WATCHDOG
:
3206 case SERVICE_STOP_SIGTERM
:
3207 case SERVICE_STOP_SIGKILL
:
3209 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3210 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3214 case SERVICE_STOP_POST
:
3215 case SERVICE_FINAL_SIGTERM
:
3216 case SERVICE_FINAL_SIGKILL
:
3217 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3218 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3227 static void service_notify_cgroup_oom_event(Unit
*u
) {
3228 Service
*s
= SERVICE(u
);
3230 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3232 if (s
->oom_policy
== OOM_CONTINUE
)
3237 case SERVICE_START_PRE
:
3239 case SERVICE_START_POST
:
3241 if (s
->oom_policy
== OOM_STOP
)
3242 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3243 else if (s
->oom_policy
== OOM_KILL
)
3244 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3248 case SERVICE_EXITED
:
3249 case SERVICE_RUNNING
:
3250 if (s
->oom_policy
== OOM_STOP
)
3251 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3252 else if (s
->oom_policy
== OOM_KILL
)
3253 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3257 case SERVICE_STOP_WATCHDOG
:
3258 case SERVICE_STOP_SIGTERM
:
3259 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3262 case SERVICE_STOP_SIGKILL
:
3263 case SERVICE_FINAL_SIGKILL
:
3264 if (s
->result
== SERVICE_SUCCESS
)
3265 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3268 case SERVICE_STOP_POST
:
3269 case SERVICE_FINAL_SIGTERM
:
3270 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3278 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3279 bool notify_dbus
= true;
3280 Service
*s
= SERVICE(u
);
3282 ExitClean clean_mode
;
3287 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3288 * considered daemons as they are typically not long running. */
3289 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3290 clean_mode
= EXIT_CLEAN_COMMAND
;
3292 clean_mode
= EXIT_CLEAN_DAEMON
;
3294 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3295 f
= SERVICE_SUCCESS
;
3296 else if (code
== CLD_EXITED
)
3297 f
= SERVICE_FAILURE_EXIT_CODE
;
3298 else if (code
== CLD_KILLED
)
3299 f
= SERVICE_FAILURE_SIGNAL
;
3300 else if (code
== CLD_DUMPED
)
3301 f
= SERVICE_FAILURE_CORE_DUMP
;
3303 assert_not_reached("Unknown code");
3305 if (s
->main_pid
== pid
) {
3306 /* Forking services may occasionally move to a new PID.
3307 * As long as they update the PID file before exiting the old
3308 * PID, they're fine. */
3309 if (service_load_pid_file(s
, false) > 0)
3313 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3315 if (s
->main_command
) {
3316 /* If this is not a forking service than the
3317 * main process got started and hence we copy
3318 * the exit status so that it is recorded both
3319 * as main and as control process exit
3322 s
->main_command
->exec_status
= s
->main_exec_status
;
3324 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3325 f
= SERVICE_SUCCESS
;
3326 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3328 /* If this is a forked process, then we should
3329 * ignore the return value if this was
3330 * configured for the starter process */
3332 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3333 f
= SERVICE_SUCCESS
;
3336 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3337 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3338 * that the service already logged the reason at a higher log level on its own. (Internally,
3339 * unit_log_process_exit() will possibly bump this to WARNING if the service died due to a signal.) */
3340 unit_log_process_exit(
3341 u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
,
3343 service_exec_command_to_string(SERVICE_EXEC_START
),
3346 if (s
->result
== SERVICE_SUCCESS
)
3349 if (s
->main_command
&&
3350 s
->main_command
->command_next
&&
3351 s
->type
== SERVICE_ONESHOT
&&
3352 f
== SERVICE_SUCCESS
) {
3354 /* There is another command to *
3355 * execute, so let's do that. */
3357 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3358 service_run_next_main(s
);
3362 /* The service exited, so the service is officially
3364 s
->main_command
= NULL
;
3368 case SERVICE_START_POST
:
3369 case SERVICE_RELOAD
:
3371 /* Need to wait until the operation is
3376 if (s
->type
== SERVICE_ONESHOT
) {
3377 /* This was our main goal, so let's go on */
3378 if (f
== SERVICE_SUCCESS
)
3379 service_enter_start_post(s
);
3381 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3383 } else if (s
->type
== SERVICE_NOTIFY
) {
3384 /* Only enter running through a notification, so that the
3385 * SERVICE_START state signifies that no ready notification
3386 * has been received */
3387 if (f
!= SERVICE_SUCCESS
)
3388 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3389 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3390 /* The service has never been and will never be active */
3391 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3396 case SERVICE_RUNNING
:
3397 service_enter_running(s
, f
);
3400 case SERVICE_STOP_WATCHDOG
:
3401 case SERVICE_STOP_SIGTERM
:
3402 case SERVICE_STOP_SIGKILL
:
3404 if (control_pid_good(s
) <= 0)
3405 service_enter_stop_post(s
, f
);
3407 /* If there is still a control process, wait for that first */
3410 case SERVICE_STOP_POST
:
3411 case SERVICE_FINAL_SIGTERM
:
3412 case SERVICE_FINAL_SIGKILL
:
3414 if (control_pid_good(s
) <= 0)
3415 service_enter_dead(s
, f
, true);
3419 assert_not_reached("Uh, main process died at wrong time.");
3423 } else if (s
->control_pid
== pid
) {
3426 if (s
->control_command
) {
3427 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3429 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3430 f
= SERVICE_SUCCESS
;
3433 unit_log_process_exit(
3434 u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
,
3436 service_exec_command_to_string(s
->control_command_id
),
3439 if (s
->result
== SERVICE_SUCCESS
)
3442 if (s
->control_command
&&
3443 s
->control_command
->command_next
&&
3444 f
== SERVICE_SUCCESS
) {
3446 /* There is another command to *
3447 * execute, so let's do that. */
3449 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3450 service_run_next_control(s
);
3453 /* No further commands for this step, so let's
3454 * figure out what to do next */
3456 s
->control_command
= NULL
;
3457 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3459 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3463 case SERVICE_START_PRE
:
3464 if (f
== SERVICE_SUCCESS
)
3465 service_enter_start(s
);
3467 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3471 if (s
->type
!= SERVICE_FORKING
)
3472 /* Maybe spurious event due to a reload that changed the type? */
3475 if (f
!= SERVICE_SUCCESS
) {
3476 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3481 bool has_start_post
;
3484 /* Let's try to load the pid file here if we can.
3485 * The PID file might actually be created by a START_POST
3486 * script. In that case don't worry if the loading fails. */
3488 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3489 r
= service_load_pid_file(s
, !has_start_post
);
3490 if (!has_start_post
&& r
< 0) {
3491 r
= service_demand_pid_file(s
);
3492 if (r
< 0 || cgroup_good(s
) == 0)
3493 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3497 service_search_main_pid(s
);
3499 service_enter_start_post(s
);
3502 case SERVICE_START_POST
:
3503 if (f
!= SERVICE_SUCCESS
) {
3504 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3511 r
= service_load_pid_file(s
, true);
3513 r
= service_demand_pid_file(s
);
3514 if (r
< 0 || cgroup_good(s
) == 0)
3515 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3519 service_search_main_pid(s
);
3521 service_enter_running(s
, SERVICE_SUCCESS
);
3524 case SERVICE_RELOAD
:
3525 if (f
== SERVICE_SUCCESS
)
3526 if (service_load_pid_file(s
, true) < 0)
3527 service_search_main_pid(s
);
3529 s
->reload_result
= f
;
3530 service_enter_running(s
, SERVICE_SUCCESS
);
3534 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3537 case SERVICE_STOP_WATCHDOG
:
3538 case SERVICE_STOP_SIGTERM
:
3539 case SERVICE_STOP_SIGKILL
:
3540 if (main_pid_good(s
) <= 0)
3541 service_enter_stop_post(s
, f
);
3543 /* If there is still a service process around, wait until
3544 * that one quit, too */
3547 case SERVICE_STOP_POST
:
3548 case SERVICE_FINAL_SIGTERM
:
3549 case SERVICE_FINAL_SIGKILL
:
3550 if (main_pid_good(s
) <= 0)
3551 service_enter_dead(s
, f
, true);
3555 assert_not_reached("Uh, control process died at wrong time.");
3558 } else /* Neither control nor main PID? If so, don't notify about anything */
3559 notify_dbus
= false;
3561 /* Notify clients about changed exit status */
3563 unit_add_to_dbus_queue(u
);
3565 /* We watch the main/control process otherwise we can't retrieve the unit they
3566 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3567 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3568 * detect when the cgroup becomes empty. Note that the control process is always
3569 * our child so it's pointless to watch all other processes. */
3570 if (!control_pid_good(s
))
3571 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3572 (void) unit_enqueue_rewatch_pids(u
);
3575 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3576 Service
*s
= SERVICE(userdata
);
3579 assert(source
== s
->timer_event_source
);
3583 case SERVICE_START_PRE
:
3585 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", s
->state
== SERVICE_START
? "Start" : "Start-pre");
3586 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3589 case SERVICE_START_POST
:
3590 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3591 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3594 case SERVICE_RUNNING
:
3595 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3596 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3599 case SERVICE_RELOAD
:
3600 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3601 service_kill_control_process(s
);
3602 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3603 service_enter_running(s
, SERVICE_SUCCESS
);
3607 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3608 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3611 case SERVICE_STOP_WATCHDOG
:
3612 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3613 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3616 case SERVICE_STOP_SIGTERM
:
3617 if (s
->kill_context
.send_sigkill
) {
3618 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3619 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3621 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3622 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3627 case SERVICE_STOP_SIGKILL
:
3628 /* Uh, we sent a SIGKILL and it is still not gone?
3629 * Must be something we cannot kill, so let's just be
3630 * weirded out and continue */
3632 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3633 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3636 case SERVICE_STOP_POST
:
3637 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3638 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3641 case SERVICE_FINAL_SIGTERM
:
3642 if (s
->kill_context
.send_sigkill
) {
3643 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3644 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3646 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3647 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3652 case SERVICE_FINAL_SIGKILL
:
3653 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3654 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3657 case SERVICE_AUTO_RESTART
:
3658 if (s
->restart_usec
> 0) {
3659 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3660 log_unit_info(UNIT(s
),
3661 "Service RestartSec=%s expired, scheduling restart.",
3662 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3664 log_unit_info(UNIT(s
),
3665 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3667 service_enter_restart(s
);
3671 assert_not_reached("Timeout at wrong time.");
3677 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3678 Service
*s
= SERVICE(userdata
);
3679 char t
[FORMAT_TIMESPAN_MAX
];
3680 usec_t watchdog_usec
;
3683 assert(source
== s
->watchdog_event_source
);
3685 watchdog_usec
= service_get_watchdog_usec(s
);
3687 if (UNIT(s
)->manager
->service_watchdogs
) {
3688 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3689 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3691 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3693 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3694 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3699 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3702 if (s
->notify_access
== NOTIFY_NONE
) {
3703 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3707 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3708 if (s
->main_pid
!= 0)
3709 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
);
3711 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
);
3716 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3717 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3718 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
,
3719 pid
, s
->main_pid
, s
->control_pid
);
3720 else if (s
->main_pid
!= 0)
3721 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
);
3722 else if (s
->control_pid
!= 0)
3723 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
);
3725 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
);
3733 static void service_notify_message(
3735 const struct ucred
*ucred
,
3739 Service
*s
= SERVICE(u
);
3740 bool notify_dbus
= false;
3748 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3751 if (DEBUG_LOGGING
) {
3752 _cleanup_free_
char *cc
= NULL
;
3754 cc
= strv_join(tags
, ", ");
3755 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3758 /* Interpret MAINPID= */
3759 e
= strv_find_startswith(tags
, "MAINPID=");
3760 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3763 if (parse_pid(e
, &new_main_pid
) < 0)
3764 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3765 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3767 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3769 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3771 if (ucred
->uid
== 0) {
3772 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
);
3775 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3778 service_set_main_pid(s
, new_main_pid
);
3780 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
3782 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3789 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3790 STRV_FOREACH_BACKWARDS(i
, tags
) {
3792 if (streq(*i
, "READY=1")) {
3793 s
->notify_state
= NOTIFY_READY
;
3795 /* Type=notify services inform us about completed
3796 * initialization with READY=1 */
3797 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3798 service_enter_start_post(s
);
3800 /* Sending READY=1 while we are reloading informs us
3801 * that the reloading is complete */
3802 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3803 service_enter_running(s
, SERVICE_SUCCESS
);
3808 } else if (streq(*i
, "RELOADING=1")) {
3809 s
->notify_state
= NOTIFY_RELOADING
;
3811 if (s
->state
== SERVICE_RUNNING
)
3812 service_enter_reload_by_notify(s
);
3817 } else if (streq(*i
, "STOPPING=1")) {
3818 s
->notify_state
= NOTIFY_STOPPING
;
3820 if (s
->state
== SERVICE_RUNNING
)
3821 service_enter_stop_by_notify(s
);
3828 /* Interpret STATUS= */
3829 e
= strv_find_startswith(tags
, "STATUS=");
3831 _cleanup_free_
char *t
= NULL
;
3834 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3835 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3836 if (strlen(e
) > STATUS_TEXT_MAX
)
3837 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3838 else if (!utf8_is_valid(e
))
3839 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
3847 if (!streq_ptr(s
->status_text
, t
)) {
3848 free_and_replace(s
->status_text
, t
);
3853 /* Interpret ERRNO= */
3854 e
= strv_find_startswith(tags
, "ERRNO=");
3858 status_errno
= parse_errno(e
);
3859 if (status_errno
< 0)
3860 log_unit_warning_errno(u
, status_errno
,
3861 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
3862 else if (s
->status_errno
!= status_errno
) {
3863 s
->status_errno
= status_errno
;
3868 /* Interpret EXTEND_TIMEOUT= */
3869 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3871 usec_t extend_timeout_usec
;
3872 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3873 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3875 service_extend_timeout(s
, extend_timeout_usec
);
3878 /* Interpret WATCHDOG= */
3879 if (strv_find(tags
, "WATCHDOG=1"))
3880 service_reset_watchdog(s
);
3882 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
3884 usec_t watchdog_override_usec
;
3885 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
3886 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
3888 service_override_watchdog_timeout(s
, watchdog_override_usec
);
3891 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3892 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3893 * fds, but optional when pushing in new fds, for compatibility reasons. */
3894 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
3897 name
= strv_find_startswith(tags
, "FDNAME=");
3898 if (!name
|| !fdname_is_valid(name
))
3899 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3901 service_remove_fd_store(s
, name
);
3903 } else if (strv_find(tags
, "FDSTORE=1")) {
3906 name
= strv_find_startswith(tags
, "FDNAME=");
3907 if (name
&& !fdname_is_valid(name
)) {
3908 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
3912 (void) service_add_fd_store_set(s
, fds
, name
);
3915 /* Notify clients about changed status or main pid */
3917 unit_add_to_dbus_queue(u
);
3920 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
3921 Service
*s
= SERVICE(u
);
3925 if (!s
->timer_event_source
)
3928 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3931 if (t
== USEC_INFINITY
)
3938 static void service_bus_name_owner_change(
3941 const char *old_owner
,
3942 const char *new_owner
) {
3944 Service
*s
= SERVICE(u
);
3950 assert(streq(s
->bus_name
, name
));
3951 assert(old_owner
|| new_owner
);
3953 if (old_owner
&& new_owner
)
3954 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", name
, old_owner
, new_owner
);
3956 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", name
, old_owner
);
3958 log_unit_debug(u
, "D-Bus name %s now registered by %s", name
, new_owner
);
3960 s
->bus_name_good
= !!new_owner
;
3962 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3963 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
3965 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
3969 if (s
->type
== SERVICE_DBUS
) {
3971 /* service_enter_running() will figure out what to
3973 if (s
->state
== SERVICE_RUNNING
)
3974 service_enter_running(s
, SERVICE_SUCCESS
);
3975 else if (s
->state
== SERVICE_START
&& new_owner
)
3976 service_enter_start_post(s
);
3978 } else if (new_owner
&&
3986 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
3989 /* Try to acquire PID from bus service */
3991 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, name
, SD_BUS_CREDS_PID
, &creds
);
3993 r
= sd_bus_creds_get_pid(creds
, &pid
);
3995 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, name
, pid
);
3997 service_set_main_pid(s
, pid
);
3998 unit_watch_pid(UNIT(s
), pid
, false);
4003 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4004 _cleanup_free_
char *peer
= NULL
;
4010 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4011 * to be configured. We take ownership of the passed fd on success. */
4013 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4016 if (s
->socket_fd
>= 0)
4019 if (s
->state
!= SERVICE_DEAD
)
4022 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4024 if (UNIT(s
)->description
) {
4025 _cleanup_free_
char *a
;
4027 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4031 r
= unit_set_description(UNIT(s
), a
);
4033 r
= unit_set_description(UNIT(s
), peer
);
4039 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4044 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4046 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4050 static void service_reset_failed(Unit
*u
) {
4051 Service
*s
= SERVICE(u
);
4055 if (s
->state
== SERVICE_FAILED
)
4056 service_set_state(s
, SERVICE_DEAD
);
4058 s
->result
= SERVICE_SUCCESS
;
4059 s
->reload_result
= SERVICE_SUCCESS
;
4061 s
->flush_n_restarts
= false;
4064 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4065 Service
*s
= SERVICE(u
);
4069 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4072 static int service_main_pid(Unit
*u
) {
4073 Service
*s
= SERVICE(u
);
4080 static int service_control_pid(Unit
*u
) {
4081 Service
*s
= SERVICE(u
);
4085 return s
->control_pid
;
4088 static bool service_needs_console(Unit
*u
) {
4089 Service
*s
= SERVICE(u
);
4093 /* We provide our own implementation of this here, instead of relying of the generic implementation
4094 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4096 if (!exec_context_may_touch_console(&s
->exec_context
))
4099 return IN_SET(s
->state
,
4106 SERVICE_STOP_WATCHDOG
,
4107 SERVICE_STOP_SIGTERM
,
4108 SERVICE_STOP_SIGKILL
,
4110 SERVICE_FINAL_SIGTERM
,
4111 SERVICE_FINAL_SIGKILL
);
4114 static int service_exit_status(Unit
*u
) {
4115 Service
*s
= SERVICE(u
);
4119 if (s
->main_exec_status
.pid
<= 0 ||
4120 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4123 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4126 return s
->main_exec_status
.status
;
4129 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4130 [SERVICE_RESTART_NO
] = "no",
4131 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4132 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4133 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4134 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4135 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4136 [SERVICE_RESTART_ALWAYS
] = "always",
4139 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4141 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4142 [SERVICE_SIMPLE
] = "simple",
4143 [SERVICE_FORKING
] = "forking",
4144 [SERVICE_ONESHOT
] = "oneshot",
4145 [SERVICE_DBUS
] = "dbus",
4146 [SERVICE_NOTIFY
] = "notify",
4147 [SERVICE_IDLE
] = "idle",
4148 [SERVICE_EXEC
] = "exec",
4151 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4153 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4154 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4155 [SERVICE_EXEC_START
] = "ExecStart",
4156 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4157 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4158 [SERVICE_EXEC_STOP
] = "ExecStop",
4159 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4162 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4164 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4165 [NOTIFY_UNKNOWN
] = "unknown",
4166 [NOTIFY_READY
] = "ready",
4167 [NOTIFY_RELOADING
] = "reloading",
4168 [NOTIFY_STOPPING
] = "stopping",
4171 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4173 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4174 [SERVICE_SUCCESS
] = "success",
4175 [SERVICE_FAILURE_RESOURCES
] = "resources",
4176 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4177 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4178 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4179 [SERVICE_FAILURE_SIGNAL
] = "signal",
4180 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4181 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4182 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4183 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4186 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4188 const UnitVTable service_vtable
= {
4189 .object_size
= sizeof(Service
),
4190 .exec_context_offset
= offsetof(Service
, exec_context
),
4191 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4192 .kill_context_offset
= offsetof(Service
, kill_context
),
4193 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4194 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4200 .private_section
= "Service",
4202 .can_transient
= true,
4203 .can_delegate
= true,
4205 .init
= service_init
,
4206 .done
= service_done
,
4207 .load
= service_load
,
4208 .release_resources
= service_release_resources
,
4210 .coldplug
= service_coldplug
,
4212 .dump
= service_dump
,
4214 .start
= service_start
,
4215 .stop
= service_stop
,
4216 .reload
= service_reload
,
4218 .can_reload
= service_can_reload
,
4220 .kill
= service_kill
,
4222 .serialize
= service_serialize
,
4223 .deserialize_item
= service_deserialize_item
,
4225 .active_state
= service_active_state
,
4226 .sub_state_to_string
= service_sub_state_to_string
,
4228 .will_restart
= service_will_restart
,
4230 .may_gc
= service_may_gc
,
4232 .sigchld_event
= service_sigchld_event
,
4234 .reset_failed
= service_reset_failed
,
4236 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4237 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4238 .notify_message
= service_notify_message
,
4240 .main_pid
= service_main_pid
,
4241 .control_pid
= service_control_pid
,
4243 .bus_name_owner_change
= service_bus_name_owner_change
,
4245 .bus_vtable
= bus_service_vtable
,
4246 .bus_set_property
= bus_service_set_property
,
4247 .bus_commit_properties
= bus_service_commit_properties
,
4249 .get_timeout
= service_get_timeout
,
4250 .needs_console
= service_needs_console
,
4251 .exit_status
= service_exit_status
,
4253 .status_message_formats
= {
4254 .starting_stopping
= {
4255 [0] = "Starting %s...",
4256 [1] = "Stopping %s...",
4258 .finished_start_job
= {
4259 [JOB_DONE
] = "Started %s.",
4260 [JOB_FAILED
] = "Failed to start %s.",
4262 .finished_stop_job
= {
4263 [JOB_DONE
] = "Stopped %s.",
4264 [JOB_FAILED
] = "Stopped (with error) %s.",