1 /* SPDX-License-Identifier: LGPL-2.1+ */
7 #include "sd-messages.h"
9 #include "alloc-util.h"
11 #include "bus-error.h"
12 #include "bus-kernel.h"
14 #include "dbus-service.h"
15 #include "dbus-unit.h"
19 #include "exit-status.h"
22 #include "format-util.h"
24 #include "load-dropin.h"
25 #include "load-fragment.h"
28 #include "parse-util.h"
29 #include "path-util.h"
30 #include "process-util.h"
31 #include "serialize.h"
33 #include "signal-util.h"
35 #include "stdio-util.h"
36 #include "string-table.h"
37 #include "string-util.h"
39 #include "unit-name.h"
44 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
45 [SERVICE_DEAD
] = UNIT_INACTIVE
,
46 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
47 [SERVICE_START
] = UNIT_ACTIVATING
,
48 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
49 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
50 [SERVICE_EXITED
] = UNIT_ACTIVE
,
51 [SERVICE_RELOAD
] = UNIT_RELOADING
,
52 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
53 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
54 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
55 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
57 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
58 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
59 [SERVICE_FAILED
] = UNIT_FAILED
,
60 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
63 /* For Type=idle we never want to delay any other jobs, hence we
64 * consider idle jobs active as soon as we start working on them */
65 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
66 [SERVICE_DEAD
] = UNIT_INACTIVE
,
67 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
68 [SERVICE_START
] = UNIT_ACTIVE
,
69 [SERVICE_START_POST
] = UNIT_ACTIVE
,
70 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
71 [SERVICE_EXITED
] = UNIT_ACTIVE
,
72 [SERVICE_RELOAD
] = UNIT_RELOADING
,
73 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
74 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
75 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
76 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
77 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
78 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
79 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
80 [SERVICE_FAILED
] = UNIT_FAILED
,
81 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
84 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
85 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
86 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
87 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
89 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
90 static void service_enter_reload_by_notify(Service
*s
);
92 static void service_init(Unit
*u
) {
93 Service
*s
= SERVICE(u
);
96 assert(u
->load_state
== UNIT_STUB
);
98 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
99 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
100 s
->restart_usec
= u
->manager
->default_restart_usec
;
101 s
->runtime_max_usec
= USEC_INFINITY
;
102 s
->type
= _SERVICE_TYPE_INVALID
;
104 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
105 s
->guess_main_pid
= true;
107 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
109 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
110 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
112 s
->watchdog_original_usec
= USEC_INFINITY
;
115 static void service_unwatch_control_pid(Service
*s
) {
118 if (s
->control_pid
<= 0)
121 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
125 static void service_unwatch_main_pid(Service
*s
) {
128 if (s
->main_pid
<= 0)
131 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
135 static void service_unwatch_pid_file(Service
*s
) {
136 if (!s
->pid_file_pathspec
)
139 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
140 path_spec_unwatch(s
->pid_file_pathspec
);
141 path_spec_done(s
->pid_file_pathspec
);
142 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
145 static int service_set_main_pid(Service
*s
, pid_t pid
) {
153 if (pid
== getpid_cached())
156 if (s
->main_pid
== pid
&& s
->main_pid_known
)
159 if (s
->main_pid
!= pid
) {
160 service_unwatch_main_pid(s
);
161 exec_status_start(&s
->main_exec_status
, pid
);
165 s
->main_pid_known
= true;
167 if (get_process_ppid(pid
, &ppid
) >= 0 && ppid
!= getpid_cached()) {
168 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
169 s
->main_pid_alien
= true;
171 s
->main_pid_alien
= false;
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 r
= service_add_default_dependencies(s
);
740 r
= service_setup_bus_name(s
);
747 static int service_load(Unit
*u
) {
748 Service
*s
= SERVICE(u
);
753 /* Load a .service file */
754 r
= unit_load_fragment(u
);
758 /* Still nothing found? Then let's give up */
759 if (u
->load_state
== UNIT_STUB
)
762 /* This is a new unit? Then let's add in some extras */
763 if (u
->load_state
== UNIT_LOADED
) {
765 /* We were able to load something, then let's add in
766 * the dropin directories. */
767 r
= unit_load_dropin(u
);
771 /* This is a new unit? Then let's add in some
773 r
= service_add_extras(s
);
778 return service_verify(s
);
781 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
782 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
];
783 char buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
];
784 ServiceExecCommand c
;
785 Service
*s
= SERVICE(u
);
790 prefix
= strempty(prefix
);
791 prefix2
= strjoina(prefix
, "\t");
794 "%sService State: %s\n"
796 "%sReload Result: %s\n"
797 "%sPermissionsStartOnly: %s\n"
798 "%sRootDirectoryStartOnly: %s\n"
799 "%sRemainAfterExit: %s\n"
800 "%sGuessMainPID: %s\n"
803 "%sNotifyAccess: %s\n"
804 "%sNotifyState: %s\n",
805 prefix
, service_state_to_string(s
->state
),
806 prefix
, service_result_to_string(s
->result
),
807 prefix
, service_result_to_string(s
->reload_result
),
808 prefix
, yes_no(s
->permissions_start_only
),
809 prefix
, yes_no(s
->root_directory_start_only
),
810 prefix
, yes_no(s
->remain_after_exit
),
811 prefix
, yes_no(s
->guess_main_pid
),
812 prefix
, service_type_to_string(s
->type
),
813 prefix
, service_restart_to_string(s
->restart
),
814 prefix
, notify_access_to_string(s
->notify_access
),
815 prefix
, notify_state_to_string(s
->notify_state
));
817 if (s
->control_pid
> 0)
819 "%sControl PID: "PID_FMT
"\n",
820 prefix
, s
->control_pid
);
824 "%sMain PID: "PID_FMT
"\n"
825 "%sMain PID Known: %s\n"
826 "%sMain PID Alien: %s\n",
828 prefix
, yes_no(s
->main_pid_known
),
829 prefix
, yes_no(s
->main_pid_alien
));
834 prefix
, s
->pid_file
);
839 "%sBus Name Good: %s\n",
841 prefix
, yes_no(s
->bus_name_good
));
843 if (UNIT_ISSET(s
->accept_socket
))
845 "%sAccept Socket: %s\n",
846 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
850 "%sTimeoutStartSec: %s\n"
851 "%sTimeoutStopSec: %s\n"
852 "%sRuntimeMaxSec: %s\n"
853 "%sWatchdogSec: %s\n",
854 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
855 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
856 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
857 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
858 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
860 kill_context_dump(&s
->kill_context
, f
, prefix
);
861 exec_context_dump(&s
->exec_context
, f
, prefix
);
863 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
865 if (!s
->exec_command
[c
])
868 fprintf(f
, "%s-> %s:\n",
869 prefix
, service_exec_command_to_string(c
));
871 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
875 fprintf(f
, "%sStatus Text: %s\n",
876 prefix
, s
->status_text
);
878 if (s
->n_fd_store_max
> 0)
880 "%sFile Descriptor Store Max: %u\n"
881 "%sFile Descriptor Store Current: %zu\n",
882 prefix
, s
->n_fd_store_max
,
883 prefix
, s
->n_fd_store
);
885 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
888 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
892 assert(pid_is_valid(pid
));
894 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
895 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
898 if (pid
== getpid_cached() || pid
== 1) {
899 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
903 if (pid
== s
->control_pid
) {
904 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
908 if (!pid_is_alive(pid
)) {
909 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
913 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
914 if (owner
== UNIT(s
)) {
915 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
916 return 1; /* Yay, it's definitely a good PID */
919 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
922 static int service_load_pid_file(Service
*s
, bool may_warn
) {
923 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
924 bool questionable_pid_file
= false;
925 _cleanup_free_
char *k
= NULL
;
926 _cleanup_close_
int fd
= -1;
935 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
937 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
938 if (fd
== -ENOLINK
) {
939 log_unit_full(UNIT(s
), LOG_DEBUG
, fd
, "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
941 questionable_pid_file
= true;
943 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
946 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
));
948 /* 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. */
949 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
950 r
= read_one_line_file(procfs
, &k
);
952 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
);
954 r
= parse_pid(k
, &pid
);
956 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
958 if (s
->main_pid_known
&& pid
== s
->main_pid
)
961 r
= service_is_suitable_main_pid(s
, pid
, prio
);
967 if (questionable_pid_file
) {
968 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
972 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
974 if (fstat(fd
, &st
) < 0)
975 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
977 if (st
.st_uid
!= 0) {
978 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
);
982 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
);
985 if (s
->main_pid_known
) {
986 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
988 service_unwatch_main_pid(s
);
989 s
->main_pid_known
= false;
991 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
993 r
= service_set_main_pid(s
, pid
);
997 r
= unit_watch_pid(UNIT(s
), pid
);
998 if (r
< 0) /* FIXME: we need to do something here */
999 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1004 static void service_search_main_pid(Service
*s
) {
1010 /* If we know it anyway, don't ever fallback to unreliable
1012 if (s
->main_pid_known
)
1015 if (!s
->guess_main_pid
)
1018 assert(s
->main_pid
<= 0);
1020 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1023 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1024 if (service_set_main_pid(s
, pid
) < 0)
1027 r
= unit_watch_pid(UNIT(s
), pid
);
1029 /* FIXME: we need to do something here */
1030 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1033 static void service_set_state(Service
*s
, ServiceState state
) {
1034 ServiceState old_state
;
1035 const UnitActiveState
*table
;
1039 if (s
->state
!= state
)
1040 bus_unit_send_pending_change_signal(UNIT(s
), false);
1042 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1044 old_state
= s
->state
;
1047 service_unwatch_pid_file(s
);
1050 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1053 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1054 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1055 SERVICE_AUTO_RESTART
))
1056 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1059 SERVICE_START
, SERVICE_START_POST
,
1060 SERVICE_RUNNING
, SERVICE_RELOAD
,
1061 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1062 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1063 service_unwatch_main_pid(s
);
1064 s
->main_command
= NULL
;
1068 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1070 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1071 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1072 service_unwatch_control_pid(s
);
1073 s
->control_command
= NULL
;
1074 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1077 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1078 unit_unwatch_all_pids(UNIT(s
));
1079 unit_dequeue_rewatch_pids(UNIT(s
));
1083 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1084 SERVICE_RUNNING
, SERVICE_RELOAD
,
1085 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1086 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1087 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1088 service_close_socket_fd(s
);
1090 if (state
!= SERVICE_START
)
1091 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1093 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1094 service_stop_watchdog(s
);
1096 /* For the inactive states unit_notify() will trim the cgroup,
1097 * but for exit we have to do that ourselves... */
1098 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1099 unit_prune_cgroup(UNIT(s
));
1101 if (old_state
!= state
)
1102 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1104 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1105 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1106 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1109 static usec_t
service_coldplug_timeout(Service
*s
) {
1112 switch (s
->deserialized_state
) {
1114 case SERVICE_START_PRE
:
1116 case SERVICE_START_POST
:
1117 case SERVICE_RELOAD
:
1118 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1120 case SERVICE_RUNNING
:
1121 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1124 case SERVICE_STOP_WATCHDOG
:
1125 case SERVICE_STOP_SIGTERM
:
1126 case SERVICE_STOP_SIGKILL
:
1127 case SERVICE_STOP_POST
:
1128 case SERVICE_FINAL_SIGTERM
:
1129 case SERVICE_FINAL_SIGKILL
:
1130 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1132 case SERVICE_AUTO_RESTART
:
1133 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1136 return USEC_INFINITY
;
1140 static int service_coldplug(Unit
*u
) {
1141 Service
*s
= SERVICE(u
);
1145 assert(s
->state
== SERVICE_DEAD
);
1147 if (s
->deserialized_state
== s
->state
)
1150 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1154 if (s
->main_pid
> 0 &&
1155 pid_is_unwaited(s
->main_pid
) &&
1156 (IN_SET(s
->deserialized_state
,
1157 SERVICE_START
, SERVICE_START_POST
,
1158 SERVICE_RUNNING
, SERVICE_RELOAD
,
1159 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1160 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1161 r
= unit_watch_pid(UNIT(s
), s
->main_pid
);
1166 if (s
->control_pid
> 0 &&
1167 pid_is_unwaited(s
->control_pid
) &&
1168 IN_SET(s
->deserialized_state
,
1169 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1171 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1172 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1173 r
= unit_watch_pid(UNIT(s
), s
->control_pid
);
1178 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1179 (void) unit_enqueue_rewatch_pids(u
);
1180 (void) unit_setup_dynamic_creds(u
);
1181 (void) unit_setup_exec_runtime(u
);
1184 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1185 service_start_watchdog(s
);
1187 if (UNIT_ISSET(s
->accept_socket
)) {
1188 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1190 if (socket
->max_connections_per_source
> 0) {
1193 /* Make a best-effort attempt at bumping the connection count */
1194 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1195 socket_peer_unref(s
->peer
);
1201 service_set_state(s
, s
->deserialized_state
);
1205 static int service_collect_fds(
1209 size_t *n_socket_fds
,
1210 size_t *n_storage_fds
) {
1212 _cleanup_strv_free_
char **rfd_names
= NULL
;
1213 _cleanup_free_
int *rfds
= NULL
;
1214 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1220 assert(n_socket_fds
);
1221 assert(n_storage_fds
);
1223 if (s
->socket_fd
>= 0) {
1225 /* Pass the per-connection socket */
1230 rfds
[0] = s
->socket_fd
;
1232 rfd_names
= strv_new("connection");
1242 /* Pass all our configured sockets for singleton services */
1244 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1245 _cleanup_free_
int *cfds
= NULL
;
1249 if (u
->type
!= UNIT_SOCKET
)
1254 cn_fds
= socket_collect_fds(sock
, &cfds
);
1262 rfds
= TAKE_PTR(cfds
);
1263 rn_socket_fds
= cn_fds
;
1267 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1271 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1274 rn_socket_fds
+= cn_fds
;
1277 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1283 if (s
->n_fd_store
> 0) {
1289 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1295 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1300 n_fds
= rn_socket_fds
;
1302 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1303 rfds
[n_fds
] = fs
->fd
;
1304 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1305 if (!rfd_names
[n_fds
])
1312 rfd_names
[n_fds
] = NULL
;
1315 *fds
= TAKE_PTR(rfds
);
1316 *fd_names
= TAKE_PTR(rfd_names
);
1317 *n_socket_fds
= rn_socket_fds
;
1318 *n_storage_fds
= rn_storage_fds
;
1323 static int service_allocate_exec_fd_event_source(
1326 sd_event_source
**ret_event_source
) {
1328 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1333 assert(ret_event_source
);
1335 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1337 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1339 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1341 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1343 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1345 (void) sd_event_source_set_description(source
, "service event_fd");
1347 r
= sd_event_source_set_io_fd_own(source
, true);
1349 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1351 *ret_event_source
= TAKE_PTR(source
);
1355 static int service_allocate_exec_fd(
1357 sd_event_source
**ret_event_source
,
1360 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1364 assert(ret_event_source
);
1365 assert(ret_exec_fd
);
1367 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1368 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1370 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1375 *ret_exec_fd
= TAKE_FD(p
[1]);
1380 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1383 /* Notifications are accepted depending on the process and
1384 * the access setting of the service:
1385 * process: \ access: NONE MAIN EXEC ALL
1386 * main no yes yes yes
1387 * control no no yes yes
1388 * other (forked) no no no yes */
1390 if (flags
& EXEC_IS_CONTROL
)
1391 /* A control process */
1392 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1394 /* We only spawn main processes and control processes, so any
1395 * process that is not a control process is a main process */
1396 return s
->notify_access
!= NOTIFY_NONE
;
1399 static int service_spawn(
1406 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1413 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1414 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1415 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1416 _cleanup_close_
int exec_fd
= -1;
1417 _cleanup_free_
int *fds
= NULL
;
1425 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1429 if (flags
& EXEC_IS_CONTROL
) {
1430 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1431 if (s
->permissions_start_only
)
1432 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1433 if (s
->root_directory_start_only
)
1434 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1437 if ((flags
& EXEC_PASS_FDS
) ||
1438 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1439 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1440 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1442 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1446 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1449 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1450 assert(!s
->exec_fd_event_source
);
1452 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1457 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1461 our_env
= new0(char*, 10);
1465 if (service_exec_needs_notify_socket(s
, flags
))
1466 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1469 if (s
->main_pid
> 0)
1470 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1473 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1474 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1478 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1481 if (s
->socket_fd
>= 0) {
1482 union sockaddr_union sa
;
1483 socklen_t salen
= sizeof(sa
);
1485 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1486 * useful. Note that we do this only when we are still connected at this point in time, which we might
1487 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1488 * in ENOTCONN), and just use whate we can use. */
1490 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1491 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1493 _cleanup_free_
char *addr
= NULL
;
1497 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1501 t
= strappend("REMOTE_ADDR=", addr
);
1504 our_env
[n_env
++] = t
;
1506 r
= sockaddr_port(&sa
.sa
, &port
);
1510 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1512 our_env
[n_env
++] = t
;
1516 if (flags
& EXEC_SETENV_RESULT
) {
1517 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1520 if (s
->main_exec_status
.pid
> 0 &&
1521 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1522 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1525 if (s
->main_exec_status
.code
== CLD_EXITED
)
1526 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1528 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1534 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1538 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1542 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1543 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1544 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1546 strv_free_and_replace(exec_params
.environment
, final_env
);
1547 exec_params
.fds
= fds
;
1548 exec_params
.fd_names
= fd_names
;
1549 exec_params
.n_socket_fds
= n_socket_fds
;
1550 exec_params
.n_storage_fds
= n_storage_fds
;
1551 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1552 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1553 if (s
->type
== SERVICE_IDLE
)
1554 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1555 exec_params
.stdin_fd
= s
->stdin_fd
;
1556 exec_params
.stdout_fd
= s
->stdout_fd
;
1557 exec_params
.stderr_fd
= s
->stderr_fd
;
1558 exec_params
.exec_fd
= exec_fd
;
1560 r
= exec_spawn(UNIT(s
),
1570 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1571 s
->exec_fd_hot
= false;
1573 r
= unit_watch_pid(UNIT(s
), pid
);
1574 if (r
< 0) /* FIXME: we need to do something here */
1582 static int main_pid_good(Service
*s
) {
1585 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1587 /* If we know the pid file, then let's just check if it is
1589 if (s
->main_pid_known
) {
1591 /* If it's an alien child let's check if it is still
1593 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1594 return pid_is_alive(s
->main_pid
);
1596 /* .. otherwise assume we'll get a SIGCHLD for it,
1597 * which we really should wait for to collect exit
1598 * status and code */
1599 return s
->main_pid
> 0;
1602 /* We don't know the pid */
1606 static int control_pid_good(Service
*s
) {
1609 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1610 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1611 * means: we can't figure it out. */
1613 return s
->control_pid
> 0;
1616 static int cgroup_good(Service
*s
) {
1621 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1624 if (!UNIT(s
)->cgroup_path
)
1627 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1634 static bool service_shall_restart(Service
*s
) {
1637 /* Don't restart after manual stops */
1638 if (s
->forbid_restart
)
1641 /* Never restart if this is configured as special exception */
1642 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1645 /* Restart if the exit code/status are configured as restart triggers */
1646 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1649 switch (s
->restart
) {
1651 case SERVICE_RESTART_NO
:
1654 case SERVICE_RESTART_ALWAYS
:
1657 case SERVICE_RESTART_ON_SUCCESS
:
1658 return s
->result
== SERVICE_SUCCESS
;
1660 case SERVICE_RESTART_ON_FAILURE
:
1661 return s
->result
!= SERVICE_SUCCESS
;
1663 case SERVICE_RESTART_ON_ABNORMAL
:
1664 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1666 case SERVICE_RESTART_ON_WATCHDOG
:
1667 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1669 case SERVICE_RESTART_ON_ABORT
:
1670 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1673 assert_not_reached("unknown restart setting");
1677 static bool service_will_restart(Unit
*u
) {
1678 Service
*s
= SERVICE(u
);
1682 if (s
->will_auto_restart
)
1684 if (s
->state
== SERVICE_AUTO_RESTART
)
1688 if (UNIT(s
)->job
->type
== JOB_START
)
1694 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1699 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1700 * undo what has already been enqueued. */
1701 if (unit_stop_pending(UNIT(s
)))
1702 allow_restart
= false;
1704 if (s
->result
== SERVICE_SUCCESS
)
1707 unit_log_result(UNIT(s
), s
->result
== SERVICE_SUCCESS
, service_result_to_string(s
->result
));
1709 if (allow_restart
&& service_shall_restart(s
))
1710 s
->will_auto_restart
= true;
1712 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1713 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1714 s
->n_keep_fd_store
++;
1716 service_set_state(s
, s
->result
!= SERVICE_SUCCESS
? SERVICE_FAILED
: SERVICE_DEAD
);
1718 if (s
->will_auto_restart
) {
1719 s
->will_auto_restart
= false;
1721 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1723 s
->n_keep_fd_store
--;
1727 service_set_state(s
, SERVICE_AUTO_RESTART
);
1729 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1730 * user can still introspect the counter. Do so on the next start. */
1731 s
->flush_n_restarts
= true;
1733 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1734 * queue, so that the fd store is possibly gc'ed again */
1735 s
->n_keep_fd_store
--;
1736 unit_add_to_gc_queue(UNIT(s
));
1738 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1739 s
->forbid_restart
= false;
1741 /* We want fresh tmpdirs in case service is started again immediately */
1742 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1744 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1745 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1746 /* Also, remove the runtime directory */
1747 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1749 /* Get rid of the IPC bits of the user */
1750 unit_unref_uid_gid(UNIT(s
), true);
1752 /* Release the user, and destroy it if we are the only remaining owner */
1753 dynamic_creds_destroy(&s
->dynamic_creds
);
1755 /* Try to delete the pid file. At this point it will be
1756 * out-of-date, and some software might be confused by it, so
1757 * let's remove it. */
1759 (void) unlink(s
->pid_file
);
1764 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1765 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1768 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1772 if (s
->result
== SERVICE_SUCCESS
)
1775 service_unwatch_control_pid(s
);
1776 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1778 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1779 if (s
->control_command
) {
1780 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1782 r
= service_spawn(s
,
1784 s
->timeout_stop_usec
,
1785 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1790 service_set_state(s
, SERVICE_STOP_POST
);
1792 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1797 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1798 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1801 static int state_to_kill_operation(ServiceState state
) {
1804 case SERVICE_STOP_WATCHDOG
:
1805 return KILL_WATCHDOG
;
1807 case SERVICE_STOP_SIGTERM
:
1808 case SERVICE_FINAL_SIGTERM
:
1809 return KILL_TERMINATE
;
1811 case SERVICE_STOP_SIGKILL
:
1812 case SERVICE_FINAL_SIGKILL
:
1816 return _KILL_OPERATION_INVALID
;
1820 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1825 if (s
->result
== SERVICE_SUCCESS
)
1828 /* Before sending any signal, make sure we track all members of this cgroup */
1829 (void) unit_watch_all_pids(UNIT(s
));
1831 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1833 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1835 r
= unit_kill_context(
1838 state_to_kill_operation(state
),
1846 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1850 service_set_state(s
, state
);
1851 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1852 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1853 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1854 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1855 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1856 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1858 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1863 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1865 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1866 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1868 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1871 static void service_enter_stop_by_notify(Service
*s
) {
1874 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1876 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1878 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1879 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1882 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1887 if (s
->result
== SERVICE_SUCCESS
)
1890 service_unwatch_control_pid(s
);
1891 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1893 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1894 if (s
->control_command
) {
1895 s
->control_command_id
= SERVICE_EXEC_STOP
;
1897 r
= service_spawn(s
,
1899 s
->timeout_stop_usec
,
1900 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1905 service_set_state(s
, SERVICE_STOP
);
1907 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1912 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1913 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1916 static bool service_good(Service
*s
) {
1920 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1923 main_pid_ok
= main_pid_good(s
);
1924 if (main_pid_ok
> 0) /* It's alive */
1926 if (main_pid_ok
== 0) /* It's dead */
1929 /* OK, we don't know anything about the main PID, maybe
1930 * because there is none. Let's check the control group
1933 return cgroup_good(s
) != 0;
1936 static void service_enter_running(Service
*s
, ServiceResult f
) {
1939 if (s
->result
== SERVICE_SUCCESS
)
1942 service_unwatch_control_pid(s
);
1944 if (s
->result
!= SERVICE_SUCCESS
)
1945 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1946 else if (service_good(s
)) {
1948 /* If there are any queued up sd_notify() notifications, process them now */
1949 if (s
->notify_state
== NOTIFY_RELOADING
)
1950 service_enter_reload_by_notify(s
);
1951 else if (s
->notify_state
== NOTIFY_STOPPING
)
1952 service_enter_stop_by_notify(s
);
1954 service_set_state(s
, SERVICE_RUNNING
);
1955 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
1958 } else if (s
->remain_after_exit
)
1959 service_set_state(s
, SERVICE_EXITED
);
1961 service_enter_stop(s
, SERVICE_SUCCESS
);
1964 static void service_enter_start_post(Service
*s
) {
1968 service_unwatch_control_pid(s
);
1969 service_reset_watchdog(s
);
1971 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
1972 if (s
->control_command
) {
1973 s
->control_command_id
= SERVICE_EXEC_START_POST
;
1975 r
= service_spawn(s
,
1977 s
->timeout_start_usec
,
1978 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
1983 service_set_state(s
, SERVICE_START_POST
);
1985 service_enter_running(s
, SERVICE_SUCCESS
);
1990 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
1991 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
1994 static void service_kill_control_process(Service
*s
) {
1999 if (s
->control_pid
<= 0)
2002 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2004 _cleanup_free_
char *comm
= NULL
;
2006 (void) get_process_comm(s
->control_pid
, &comm
);
2008 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2009 s
->control_pid
, strna(comm
));
2013 static int service_adverse_to_leftover_processes(Service
*s
) {
2016 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2017 * SendSIGKILL is used for services that require a clean shutdown. These are typically database
2018 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or
2019 * startup time is quite variable (so Timeout settings aren't of use).
2021 * Here we take these two factors and refuse to start a service if there are existing processes
2022 * within a control group. Databases, while generally having some protection against multiple
2023 * instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service
2024 * aren't as rigoriously written to protect aganst against multiple use. */
2025 if (unit_warn_leftover_processes(UNIT(s
)) &&
2026 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2027 !s
->kill_context
.send_sigkill
) {
2028 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");
2033 static void service_enter_start(Service
*s
) {
2041 service_unwatch_control_pid(s
);
2042 service_unwatch_main_pid(s
);
2044 r
= service_adverse_to_leftover_processes(s
);
2048 if (s
->type
== SERVICE_FORKING
) {
2049 s
->control_command_id
= SERVICE_EXEC_START
;
2050 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2052 s
->main_command
= NULL
;
2054 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2055 s
->control_command
= NULL
;
2057 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2061 if (s
->type
!= SERVICE_ONESHOT
) {
2062 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2063 * happen if the configuration changes at runtime. In this case, let's enter a failure
2065 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2070 /* We force a fake state transition here. Otherwise, the unit would go directly from
2071 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2072 * inbetween. This way we can later trigger actions that depend on the state
2073 * transition, including SuccessAction=. */
2074 service_set_state(s
, SERVICE_START
);
2076 service_enter_start_post(s
);
2080 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2081 /* For simple + idle this is the main process. We don't apply any timeout here, but
2082 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2083 timeout
= USEC_INFINITY
;
2085 timeout
= s
->timeout_start_usec
;
2087 r
= service_spawn(s
,
2090 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2095 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2096 /* For simple services we immediately start
2097 * the START_POST binaries. */
2099 service_set_main_pid(s
, pid
);
2100 service_enter_start_post(s
);
2102 } else if (s
->type
== SERVICE_FORKING
) {
2104 /* For forking services we wait until the start
2105 * process exited. */
2107 s
->control_pid
= pid
;
2108 service_set_state(s
, SERVICE_START
);
2110 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2112 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2114 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2115 * bus. 'notify' and 'exec' services are similar. */
2117 service_set_main_pid(s
, pid
);
2118 service_set_state(s
, SERVICE_START
);
2120 assert_not_reached("Unknown service type");
2125 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2126 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2129 static void service_enter_start_pre(Service
*s
) {
2134 service_unwatch_control_pid(s
);
2136 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2137 if (s
->control_command
) {
2139 r
= service_adverse_to_leftover_processes(s
);
2143 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2145 r
= service_spawn(s
,
2147 s
->timeout_start_usec
,
2148 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2153 service_set_state(s
, SERVICE_START_PRE
);
2155 service_enter_start(s
);
2160 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2161 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2164 static void service_enter_restart(Service
*s
) {
2165 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2170 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2171 /* Don't restart things if we are going down anyway */
2172 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2174 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2181 /* Any units that are bound to this service must also be
2182 * restarted. We use JOB_RESTART (instead of the more obvious
2183 * JOB_START) here so that those dependency jobs will be added
2185 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, &error
, NULL
);
2189 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2190 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2191 * explicitly however via the usual "systemctl reset-failure" logic. */
2193 s
->flush_n_restarts
= false;
2195 log_struct(LOG_INFO
,
2196 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2197 LOG_UNIT_ID(UNIT(s
)),
2198 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2199 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2200 "N_RESTARTS=%u", s
->n_restarts
);
2202 /* Notify clients about changed restart counter */
2203 unit_add_to_dbus_queue(UNIT(s
));
2205 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2206 * it will be canceled as part of the service_stop() call that
2207 * is executed as part of JOB_RESTART. */
2212 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2213 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2216 static void service_enter_reload_by_notify(Service
*s
) {
2217 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2222 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2223 service_set_state(s
, SERVICE_RELOAD
);
2225 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2226 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2228 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2231 static void service_enter_reload(Service
*s
) {
2236 service_unwatch_control_pid(s
);
2237 s
->reload_result
= SERVICE_SUCCESS
;
2239 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2240 if (s
->control_command
) {
2241 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2243 r
= service_spawn(s
,
2245 s
->timeout_start_usec
,
2246 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2251 service_set_state(s
, SERVICE_RELOAD
);
2253 service_enter_running(s
, SERVICE_SUCCESS
);
2258 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2259 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2260 service_enter_running(s
, SERVICE_SUCCESS
);
2263 static void service_run_next_control(Service
*s
) {
2268 assert(s
->control_command
);
2269 assert(s
->control_command
->command_next
);
2271 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2273 s
->control_command
= s
->control_command
->command_next
;
2274 service_unwatch_control_pid(s
);
2276 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2277 timeout
= s
->timeout_start_usec
;
2279 timeout
= s
->timeout_stop_usec
;
2281 r
= service_spawn(s
,
2284 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2285 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2286 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2287 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2295 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2297 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2298 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2299 else if (s
->state
== SERVICE_STOP_POST
)
2300 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2301 else if (s
->state
== SERVICE_RELOAD
) {
2302 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2303 service_enter_running(s
, SERVICE_SUCCESS
);
2305 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2308 static void service_run_next_main(Service
*s
) {
2313 assert(s
->main_command
);
2314 assert(s
->main_command
->command_next
);
2315 assert(s
->type
== SERVICE_ONESHOT
);
2317 s
->main_command
= s
->main_command
->command_next
;
2318 service_unwatch_main_pid(s
);
2320 r
= service_spawn(s
,
2322 s
->timeout_start_usec
,
2323 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2328 service_set_main_pid(s
, pid
);
2333 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2334 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2337 static int service_start(Unit
*u
) {
2338 Service
*s
= SERVICE(u
);
2343 /* We cannot fulfill this request right now, try again later
2345 if (IN_SET(s
->state
,
2346 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2347 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2350 /* Already on it! */
2351 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2354 /* A service that will be restarted must be stopped first to
2355 * trigger BindsTo and/or OnFailure dependencies. If a user
2356 * does not want to wait for the holdoff time to elapse, the
2357 * service should be manually restarted, not started. We
2358 * simply return EAGAIN here, so that any start jobs stay
2359 * queued, and assume that the auto restart timer will
2360 * eventually trigger the restart. */
2361 if (s
->state
== SERVICE_AUTO_RESTART
)
2364 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2366 /* Make sure we don't enter a busy loop of some kind. */
2367 r
= unit_start_limit_test(u
);
2369 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2373 r
= unit_acquire_invocation_id(u
);
2377 s
->result
= SERVICE_SUCCESS
;
2378 s
->reload_result
= SERVICE_SUCCESS
;
2379 s
->main_pid_known
= false;
2380 s
->main_pid_alien
= false;
2381 s
->forbid_restart
= false;
2383 s
->status_text
= mfree(s
->status_text
);
2384 s
->status_errno
= 0;
2386 s
->notify_state
= NOTIFY_UNKNOWN
;
2388 s
->watchdog_original_usec
= s
->watchdog_usec
;
2389 s
->watchdog_override_enable
= false;
2390 s
->watchdog_override_usec
= USEC_INFINITY
;
2392 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2393 exec_status_reset(&s
->main_exec_status
);
2395 /* This is not an automatic restart? Flush the restart counter then */
2396 if (s
->flush_n_restarts
) {
2398 s
->flush_n_restarts
= false;
2401 u
->reset_accounting
= true;
2403 service_enter_start_pre(s
);
2407 static int service_stop(Unit
*u
) {
2408 Service
*s
= SERVICE(u
);
2412 /* Don't create restart jobs from manual stops. */
2413 s
->forbid_restart
= true;
2416 if (IN_SET(s
->state
,
2417 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2418 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2421 /* A restart will be scheduled or is in progress. */
2422 if (s
->state
== SERVICE_AUTO_RESTART
) {
2423 service_set_state(s
, SERVICE_DEAD
);
2427 /* If there's already something running we go directly into
2429 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
)) {
2430 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2434 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2436 service_enter_stop(s
, SERVICE_SUCCESS
);
2440 static int service_reload(Unit
*u
) {
2441 Service
*s
= SERVICE(u
);
2445 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2447 service_enter_reload(s
);
2451 _pure_
static bool service_can_reload(Unit
*u
) {
2452 Service
*s
= SERVICE(u
);
2456 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2459 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2460 Service
*s
= SERVICE(u
);
2462 ExecCommand
*first
, *c
;
2466 first
= s
->exec_command
[id
];
2468 /* Figure out where we are in the list by walking back to the beginning */
2469 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2475 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2476 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2477 size_t allocated
= 0, length
= 0;
2478 Service
*s
= SERVICE(u
);
2479 const char *type
, *key
;
2480 ServiceExecCommand id
;
2490 if (command
== s
->control_command
) {
2492 id
= s
->control_command_id
;
2495 id
= SERVICE_EXEC_START
;
2498 idx
= service_exec_command_index(u
, id
, command
);
2500 STRV_FOREACH(arg
, command
->argv
) {
2501 _cleanup_free_
char *e
= NULL
;
2509 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1 + n
+ 1))
2513 args
[length
++] = ' ';
2515 memcpy(args
+ length
, e
, n
);
2519 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2524 p
= cescape(command
->path
);
2528 key
= strjoina(type
, "-command");
2529 return serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2532 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2533 Service
*s
= SERVICE(u
);
2541 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2542 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2543 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2545 if (s
->control_pid
> 0)
2546 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2548 if (s
->main_pid_known
&& s
->main_pid
> 0)
2549 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2551 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2552 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2553 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2555 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2556 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2558 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2562 service_serialize_exec_command(u
, f
, s
->control_command
);
2563 service_serialize_exec_command(u
, f
, s
->main_command
);
2565 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2568 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2571 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2575 if (s
->exec_fd_event_source
) {
2576 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2580 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2583 if (UNIT_ISSET(s
->accept_socket
)) {
2584 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2589 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2593 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2594 _cleanup_free_
char *c
= NULL
;
2597 copy
= fdset_put_dup(fds
, fs
->fd
);
2599 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2601 c
= cescape(fs
->fdname
);
2605 (void) serialize_item_format(f
, "fd-store-fd", "%i %s", copy
, c
);
2608 if (s
->main_exec_status
.pid
> 0) {
2609 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2610 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2611 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2613 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2614 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2615 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2619 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2620 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2622 if (s
->watchdog_override_enable
)
2623 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2625 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2626 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2631 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2632 Service
*s
= SERVICE(u
);
2634 unsigned idx
= 0, i
;
2635 bool control
, found
= false;
2636 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2637 ExecCommand
*command
= NULL
;
2638 _cleanup_free_
char *path
= NULL
;
2639 _cleanup_strv_free_
char **argv
= NULL
;
2641 enum ExecCommandState
{
2642 STATE_EXEC_COMMAND_TYPE
,
2643 STATE_EXEC_COMMAND_INDEX
,
2644 STATE_EXEC_COMMAND_PATH
,
2645 STATE_EXEC_COMMAND_ARGS
,
2646 _STATE_EXEC_COMMAND_MAX
,
2647 _STATE_EXEC_COMMAND_INVALID
= -1,
2654 control
= streq(key
, "control-command");
2656 state
= STATE_EXEC_COMMAND_TYPE
;
2659 _cleanup_free_
char *arg
= NULL
;
2661 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
);
2668 case STATE_EXEC_COMMAND_TYPE
:
2669 id
= service_exec_command_from_string(arg
);
2673 state
= STATE_EXEC_COMMAND_INDEX
;
2675 case STATE_EXEC_COMMAND_INDEX
:
2676 r
= safe_atou(arg
, &idx
);
2680 state
= STATE_EXEC_COMMAND_PATH
;
2682 case STATE_EXEC_COMMAND_PATH
:
2683 path
= TAKE_PTR(arg
);
2684 state
= STATE_EXEC_COMMAND_ARGS
;
2686 if (!path_is_absolute(path
))
2689 case STATE_EXEC_COMMAND_ARGS
:
2690 r
= strv_extend(&argv
, arg
);
2695 assert_not_reached("Unknown error at deserialization of exec command");
2700 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2703 /* Let's check whether exec command on given offset matches data that we just deserialized */
2704 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2708 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2713 /* Command at the index we serialized is different, let's look for command that exactly
2714 * matches but is on different index. If there is no such command we will not resume execution. */
2715 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2716 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2720 if (command
&& control
)
2721 s
->control_command
= command
;
2723 s
->main_command
= command
;
2725 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2730 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2731 Service
*s
= SERVICE(u
);
2739 if (streq(key
, "state")) {
2742 state
= service_state_from_string(value
);
2744 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2746 s
->deserialized_state
= state
;
2747 } else if (streq(key
, "result")) {
2750 f
= service_result_from_string(value
);
2752 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2753 else if (f
!= SERVICE_SUCCESS
)
2756 } else if (streq(key
, "reload-result")) {
2759 f
= service_result_from_string(value
);
2761 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2762 else if (f
!= SERVICE_SUCCESS
)
2763 s
->reload_result
= f
;
2765 } else if (streq(key
, "control-pid")) {
2768 if (parse_pid(value
, &pid
) < 0)
2769 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2771 s
->control_pid
= pid
;
2772 } else if (streq(key
, "main-pid")) {
2775 if (parse_pid(value
, &pid
) < 0)
2776 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2778 (void) service_set_main_pid(s
, pid
);
2779 } else if (streq(key
, "main-pid-known")) {
2782 b
= parse_boolean(value
);
2784 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2786 s
->main_pid_known
= b
;
2787 } else if (streq(key
, "bus-name-good")) {
2790 b
= parse_boolean(value
);
2792 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2794 s
->bus_name_good
= b
;
2795 } else if (streq(key
, "bus-name-owner")) {
2796 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2798 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2799 } else if (streq(key
, "status-text")) {
2802 r
= cunescape(value
, 0, &t
);
2804 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2806 free_and_replace(s
->status_text
, t
);
2808 } else if (streq(key
, "accept-socket")) {
2811 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2813 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2815 unit_ref_set(&s
->accept_socket
, u
, socket
);
2816 SOCKET(socket
)->n_connections
++;
2819 } else if (streq(key
, "socket-fd")) {
2822 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2823 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2825 asynchronous_close(s
->socket_fd
);
2826 s
->socket_fd
= fdset_remove(fds
, fd
);
2828 } else if (streq(key
, "fd-store-fd")) {
2833 pf
= strcspn(value
, WHITESPACE
);
2834 fdv
= strndupa(value
, pf
);
2836 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2837 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2839 _cleanup_free_
char *t
= NULL
;
2843 fdn
+= strspn(fdn
, WHITESPACE
);
2844 (void) cunescape(fdn
, 0, &t
);
2846 r
= service_add_fd_store(s
, fd
, t
);
2848 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2850 fdset_remove(fds
, fd
);
2853 } else if (streq(key
, "main-exec-status-pid")) {
2856 if (parse_pid(value
, &pid
) < 0)
2857 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2859 s
->main_exec_status
.pid
= pid
;
2860 } else if (streq(key
, "main-exec-status-code")) {
2863 if (safe_atoi(value
, &i
) < 0)
2864 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2866 s
->main_exec_status
.code
= i
;
2867 } else if (streq(key
, "main-exec-status-status")) {
2870 if (safe_atoi(value
, &i
) < 0)
2871 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2873 s
->main_exec_status
.status
= i
;
2874 } else if (streq(key
, "main-exec-status-start"))
2875 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2876 else if (streq(key
, "main-exec-status-exit"))
2877 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2878 else if (streq(key
, "watchdog-timestamp"))
2879 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2880 else if (streq(key
, "forbid-restart")) {
2883 b
= parse_boolean(value
);
2885 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2887 s
->forbid_restart
= b
;
2888 } else if (streq(key
, "stdin-fd")) {
2891 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2892 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2894 asynchronous_close(s
->stdin_fd
);
2895 s
->stdin_fd
= fdset_remove(fds
, fd
);
2896 s
->exec_context
.stdio_as_fds
= true;
2898 } else if (streq(key
, "stdout-fd")) {
2901 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2902 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
2904 asynchronous_close(s
->stdout_fd
);
2905 s
->stdout_fd
= fdset_remove(fds
, fd
);
2906 s
->exec_context
.stdio_as_fds
= true;
2908 } else if (streq(key
, "stderr-fd")) {
2911 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2912 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
2914 asynchronous_close(s
->stderr_fd
);
2915 s
->stderr_fd
= fdset_remove(fds
, fd
);
2916 s
->exec_context
.stdio_as_fds
= true;
2918 } else if (streq(key
, "exec-fd")) {
2921 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2922 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
2924 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
2926 fd
= fdset_remove(fds
, fd
);
2927 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
2930 } else if (streq(key
, "watchdog-override-usec")) {
2931 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
2932 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
2934 s
->watchdog_override_enable
= true;
2936 } else if (streq(key
, "watchdog-original-usec")) {
2937 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
2938 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
2940 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
2941 r
= service_deserialize_exec_command(u
, key
, value
);
2943 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
2945 } else if (streq(key
, "n-restarts")) {
2946 r
= safe_atou(value
, &s
->n_restarts
);
2948 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
2950 } else if (streq(key
, "flush-n-restarts")) {
2951 r
= parse_boolean(value
);
2953 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
2955 s
->flush_n_restarts
= r
;
2957 log_unit_debug(u
, "Unknown serialization key: %s", key
);
2962 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
2963 const UnitActiveState
*table
;
2967 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
2969 return table
[SERVICE(u
)->state
];
2972 static const char *service_sub_state_to_string(Unit
*u
) {
2975 return service_state_to_string(SERVICE(u
)->state
);
2978 static bool service_may_gc(Unit
*u
) {
2979 Service
*s
= SERVICE(u
);
2983 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2984 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2985 * have moved outside of the cgroup. */
2987 if (main_pid_good(s
) > 0 ||
2988 control_pid_good(s
) > 0)
2994 static int service_retry_pid_file(Service
*s
) {
2997 assert(s
->pid_file
);
2998 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3000 r
= service_load_pid_file(s
, false);
3004 service_unwatch_pid_file(s
);
3006 service_enter_running(s
, SERVICE_SUCCESS
);
3010 static int service_watch_pid_file(Service
*s
) {
3013 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3015 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3019 /* the pidfile might have appeared just before we set the watch */
3020 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3021 service_retry_pid_file(s
);
3025 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3026 service_unwatch_pid_file(s
);
3030 static int service_demand_pid_file(Service
*s
) {
3033 assert(s
->pid_file
);
3034 assert(!s
->pid_file_pathspec
);
3036 ps
= new0(PathSpec
, 1);
3041 ps
->path
= strdup(s
->pid_file
);
3047 path_simplify(ps
->path
, false);
3049 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3050 * keep their PID file open all the time. */
3051 ps
->type
= PATH_MODIFIED
;
3052 ps
->inotify_fd
= -1;
3054 s
->pid_file_pathspec
= ps
;
3056 return service_watch_pid_file(s
);
3059 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3060 PathSpec
*p
= userdata
;
3065 s
= SERVICE(p
->unit
);
3069 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3070 assert(s
->pid_file_pathspec
);
3071 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3073 log_unit_debug(UNIT(s
), "inotify event");
3075 if (path_spec_fd_event(p
, events
) < 0)
3078 if (service_retry_pid_file(s
) == 0)
3081 if (service_watch_pid_file(s
) < 0)
3087 service_unwatch_pid_file(s
);
3088 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3092 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3093 Service
*s
= SERVICE(userdata
);
3097 log_unit_debug(UNIT(s
), "got exec-fd event");
3099 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3100 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3101 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3102 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3103 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3104 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3105 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3106 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3112 n
= read(fd
, &x
, sizeof(x
));
3114 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3117 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3119 if (n
== 0) { /* EOF → the event we are waiting for */
3121 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3123 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3124 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3126 s
->exec_fd_hot
= false;
3128 /* Nice! This is what we have been waiting for. Transition to next state. */
3129 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3130 service_enter_start_post(s
);
3132 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3137 /* A byte was read → this turns on/off the exec fd logic */
3138 assert(n
== sizeof(x
));
3145 static void service_notify_cgroup_empty_event(Unit
*u
) {
3146 Service
*s
= SERVICE(u
);
3150 log_unit_debug(u
, "cgroup is empty");
3154 /* Waiting for SIGCHLD is usually more interesting,
3155 * because it includes return codes/signals. Which is
3156 * why we ignore the cgroup events for most cases,
3157 * except when we don't know pid which to expect the
3161 if (s
->type
== SERVICE_NOTIFY
&&
3162 main_pid_good(s
) == 0 &&
3163 control_pid_good(s
) == 0) {
3164 /* No chance of getting a ready notification anymore */
3165 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3170 case SERVICE_START_POST
:
3171 if (s
->pid_file_pathspec
&&
3172 main_pid_good(s
) == 0 &&
3173 control_pid_good(s
) == 0) {
3175 /* Give up hoping for the daemon to write its PID file */
3176 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3178 service_unwatch_pid_file(s
);
3179 if (s
->state
== SERVICE_START
)
3180 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3182 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3186 case SERVICE_RUNNING
:
3187 /* service_enter_running() will figure out what to do */
3188 service_enter_running(s
, SERVICE_SUCCESS
);
3191 case SERVICE_STOP_WATCHDOG
:
3192 case SERVICE_STOP_SIGTERM
:
3193 case SERVICE_STOP_SIGKILL
:
3195 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3196 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3200 case SERVICE_STOP_POST
:
3201 case SERVICE_FINAL_SIGTERM
:
3202 case SERVICE_FINAL_SIGKILL
:
3203 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3204 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3213 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3214 bool notify_dbus
= true;
3215 Service
*s
= SERVICE(u
);
3221 if (is_clean_exit(code
, status
, s
->type
== SERVICE_ONESHOT
? EXIT_CLEAN_COMMAND
: EXIT_CLEAN_DAEMON
, &s
->success_status
))
3222 f
= SERVICE_SUCCESS
;
3223 else if (code
== CLD_EXITED
)
3224 f
= SERVICE_FAILURE_EXIT_CODE
;
3225 else if (code
== CLD_KILLED
)
3226 f
= SERVICE_FAILURE_SIGNAL
;
3227 else if (code
== CLD_DUMPED
)
3228 f
= SERVICE_FAILURE_CORE_DUMP
;
3230 assert_not_reached("Unknown code");
3232 if (s
->main_pid
== pid
) {
3233 /* Forking services may occasionally move to a new PID.
3234 * As long as they update the PID file before exiting the old
3235 * PID, they're fine. */
3236 if (service_load_pid_file(s
, false) > 0)
3240 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3242 if (s
->main_command
) {
3243 /* If this is not a forking service than the
3244 * main process got started and hence we copy
3245 * the exit status so that it is recorded both
3246 * as main and as control process exit
3249 s
->main_command
->exec_status
= s
->main_exec_status
;
3251 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3252 f
= SERVICE_SUCCESS
;
3253 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3255 /* If this is a forked process, then we should
3256 * ignore the return value if this was
3257 * configured for the starter process */
3259 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3260 f
= SERVICE_SUCCESS
;
3263 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3264 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3265 * that the service already logged the reason at a higher log level on its own. (Internally,
3266 * unit_log_process_exit() will possibly bump this to WARNING if the service died due to a signal.) */
3267 unit_log_process_exit(
3268 u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
,
3270 service_exec_command_to_string(SERVICE_EXEC_START
),
3273 if (s
->result
== SERVICE_SUCCESS
)
3276 if (s
->main_command
&&
3277 s
->main_command
->command_next
&&
3278 s
->type
== SERVICE_ONESHOT
&&
3279 f
== SERVICE_SUCCESS
) {
3281 /* There is another command to *
3282 * execute, so let's do that. */
3284 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3285 service_run_next_main(s
);
3289 /* The service exited, so the service is officially
3291 s
->main_command
= NULL
;
3295 case SERVICE_START_POST
:
3296 case SERVICE_RELOAD
:
3298 /* Need to wait until the operation is
3303 if (s
->type
== SERVICE_ONESHOT
) {
3304 /* This was our main goal, so let's go on */
3305 if (f
== SERVICE_SUCCESS
)
3306 service_enter_start_post(s
);
3308 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3310 } else if (s
->type
== SERVICE_NOTIFY
) {
3311 /* Only enter running through a notification, so that the
3312 * SERVICE_START state signifies that no ready notification
3313 * has been received */
3314 if (f
!= SERVICE_SUCCESS
)
3315 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3316 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3317 /* The service has never been and will never be active */
3318 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3323 case SERVICE_RUNNING
:
3324 service_enter_running(s
, f
);
3327 case SERVICE_STOP_WATCHDOG
:
3328 case SERVICE_STOP_SIGTERM
:
3329 case SERVICE_STOP_SIGKILL
:
3331 if (control_pid_good(s
) <= 0)
3332 service_enter_stop_post(s
, f
);
3334 /* If there is still a control process, wait for that first */
3337 case SERVICE_STOP_POST
:
3338 case SERVICE_FINAL_SIGTERM
:
3339 case SERVICE_FINAL_SIGKILL
:
3341 if (control_pid_good(s
) <= 0)
3342 service_enter_dead(s
, f
, true);
3346 assert_not_reached("Uh, main process died at wrong time.");
3350 } else if (s
->control_pid
== pid
) {
3353 if (s
->control_command
) {
3354 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3356 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3357 f
= SERVICE_SUCCESS
;
3360 unit_log_process_exit(
3361 u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
,
3363 service_exec_command_to_string(s
->control_command_id
),
3366 if (s
->result
== SERVICE_SUCCESS
)
3369 if (s
->control_command
&&
3370 s
->control_command
->command_next
&&
3371 f
== SERVICE_SUCCESS
) {
3373 /* There is another command to *
3374 * execute, so let's do that. */
3376 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3377 service_run_next_control(s
);
3380 /* No further commands for this step, so let's
3381 * figure out what to do next */
3383 s
->control_command
= NULL
;
3384 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3386 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3390 case SERVICE_START_PRE
:
3391 if (f
== SERVICE_SUCCESS
)
3392 service_enter_start(s
);
3394 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3398 if (s
->type
!= SERVICE_FORKING
)
3399 /* Maybe spurious event due to a reload that changed the type? */
3402 if (f
!= SERVICE_SUCCESS
) {
3403 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3408 bool has_start_post
;
3411 /* Let's try to load the pid file here if we can.
3412 * The PID file might actually be created by a START_POST
3413 * script. In that case don't worry if the loading fails. */
3415 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3416 r
= service_load_pid_file(s
, !has_start_post
);
3417 if (!has_start_post
&& r
< 0) {
3418 r
= service_demand_pid_file(s
);
3419 if (r
< 0 || cgroup_good(s
) == 0)
3420 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3424 service_search_main_pid(s
);
3426 service_enter_start_post(s
);
3429 case SERVICE_START_POST
:
3430 if (f
!= SERVICE_SUCCESS
) {
3431 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3438 r
= service_load_pid_file(s
, true);
3440 r
= service_demand_pid_file(s
);
3441 if (r
< 0 || cgroup_good(s
) == 0)
3442 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3446 service_search_main_pid(s
);
3448 service_enter_running(s
, SERVICE_SUCCESS
);
3451 case SERVICE_RELOAD
:
3452 if (f
== SERVICE_SUCCESS
)
3453 if (service_load_pid_file(s
, true) < 0)
3454 service_search_main_pid(s
);
3456 s
->reload_result
= f
;
3457 service_enter_running(s
, SERVICE_SUCCESS
);
3461 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3464 case SERVICE_STOP_WATCHDOG
:
3465 case SERVICE_STOP_SIGTERM
:
3466 case SERVICE_STOP_SIGKILL
:
3467 if (main_pid_good(s
) <= 0)
3468 service_enter_stop_post(s
, f
);
3470 /* If there is still a service
3471 * process around, wait until
3472 * that one quit, too */
3475 case SERVICE_STOP_POST
:
3476 case SERVICE_FINAL_SIGTERM
:
3477 case SERVICE_FINAL_SIGKILL
:
3478 if (main_pid_good(s
) <= 0)
3479 service_enter_dead(s
, f
, true);
3483 assert_not_reached("Uh, control process died at wrong time.");
3486 } else /* Neither control nor main PID? If so, don't notify about anything */
3487 notify_dbus
= false;
3489 /* Notify clients about changed exit status */
3491 unit_add_to_dbus_queue(u
);
3493 /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to watch,
3494 * under the assumption that we'll sooner or later get a SIGCHLD for them, as the original process we watched
3495 * was probably the parent of them, and they are hence now our children. */
3496 (void) unit_enqueue_rewatch_pids(u
);
3499 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3500 Service
*s
= SERVICE(userdata
);
3503 assert(source
== s
->timer_event_source
);
3507 case SERVICE_START_PRE
:
3509 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", s
->state
== SERVICE_START
? "Start" : "Start-pre");
3510 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3513 case SERVICE_START_POST
:
3514 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3515 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3518 case SERVICE_RUNNING
:
3519 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3520 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3523 case SERVICE_RELOAD
:
3524 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3525 service_kill_control_process(s
);
3526 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3527 service_enter_running(s
, SERVICE_SUCCESS
);
3531 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3532 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3535 case SERVICE_STOP_WATCHDOG
:
3536 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3537 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3540 case SERVICE_STOP_SIGTERM
:
3541 if (s
->kill_context
.send_sigkill
) {
3542 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3543 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3545 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3546 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3551 case SERVICE_STOP_SIGKILL
:
3552 /* Uh, we sent a SIGKILL and it is still not gone?
3553 * Must be something we cannot kill, so let's just be
3554 * weirded out and continue */
3556 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3557 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3560 case SERVICE_STOP_POST
:
3561 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3562 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3565 case SERVICE_FINAL_SIGTERM
:
3566 if (s
->kill_context
.send_sigkill
) {
3567 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3568 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3570 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3571 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3576 case SERVICE_FINAL_SIGKILL
:
3577 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3578 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3581 case SERVICE_AUTO_RESTART
:
3582 if (s
->restart_usec
> 0) {
3583 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3584 log_unit_info(UNIT(s
),
3585 "Service RestartSec=%s expired, scheduling restart.",
3586 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3588 log_unit_info(UNIT(s
),
3589 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3591 service_enter_restart(s
);
3595 assert_not_reached("Timeout at wrong time.");
3601 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3602 Service
*s
= SERVICE(userdata
);
3603 char t
[FORMAT_TIMESPAN_MAX
];
3604 usec_t watchdog_usec
;
3607 assert(source
== s
->watchdog_event_source
);
3609 watchdog_usec
= service_get_watchdog_usec(s
);
3611 if (UNIT(s
)->manager
->service_watchdogs
) {
3612 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3613 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3615 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3617 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3618 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3623 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3626 if (s
->notify_access
== NOTIFY_NONE
) {
3627 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3631 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3632 if (s
->main_pid
!= 0)
3633 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
);
3635 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
);
3640 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3641 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3642 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
,
3643 pid
, s
->main_pid
, s
->control_pid
);
3644 else if (s
->main_pid
!= 0)
3645 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
);
3646 else if (s
->control_pid
!= 0)
3647 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
);
3649 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
);
3657 static void service_notify_message(
3659 const struct ucred
*ucred
,
3663 Service
*s
= SERVICE(u
);
3664 bool notify_dbus
= false;
3672 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3675 if (DEBUG_LOGGING
) {
3676 _cleanup_free_
char *cc
= NULL
;
3678 cc
= strv_join(tags
, ", ");
3679 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3682 /* Interpret MAINPID= */
3683 e
= strv_find_startswith(tags
, "MAINPID=");
3684 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3687 if (parse_pid(e
, &new_main_pid
) < 0)
3688 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3689 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3691 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3693 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3695 if (ucred
->uid
== 0) {
3696 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
);
3699 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3702 service_set_main_pid(s
, new_main_pid
);
3704 r
= unit_watch_pid(UNIT(s
), new_main_pid
);
3706 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3713 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3714 STRV_FOREACH_BACKWARDS(i
, tags
) {
3716 if (streq(*i
, "READY=1")) {
3717 s
->notify_state
= NOTIFY_READY
;
3719 /* Type=notify services inform us about completed
3720 * initialization with READY=1 */
3721 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3722 service_enter_start_post(s
);
3724 /* Sending READY=1 while we are reloading informs us
3725 * that the reloading is complete */
3726 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3727 service_enter_running(s
, SERVICE_SUCCESS
);
3732 } else if (streq(*i
, "RELOADING=1")) {
3733 s
->notify_state
= NOTIFY_RELOADING
;
3735 if (s
->state
== SERVICE_RUNNING
)
3736 service_enter_reload_by_notify(s
);
3741 } else if (streq(*i
, "STOPPING=1")) {
3742 s
->notify_state
= NOTIFY_STOPPING
;
3744 if (s
->state
== SERVICE_RUNNING
)
3745 service_enter_stop_by_notify(s
);
3752 /* Interpret STATUS= */
3753 e
= strv_find_startswith(tags
, "STATUS=");
3755 _cleanup_free_
char *t
= NULL
;
3758 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3759 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3760 if (strlen(e
) > STATUS_TEXT_MAX
)
3761 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3762 else if (!utf8_is_valid(e
))
3763 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
3771 if (!streq_ptr(s
->status_text
, t
)) {
3772 free_and_replace(s
->status_text
, t
);
3777 /* Interpret ERRNO= */
3778 e
= strv_find_startswith(tags
, "ERRNO=");
3782 status_errno
= parse_errno(e
);
3783 if (status_errno
< 0)
3784 log_unit_warning_errno(u
, status_errno
,
3785 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
3786 else if (s
->status_errno
!= status_errno
) {
3787 s
->status_errno
= status_errno
;
3792 /* Interpret EXTEND_TIMEOUT= */
3793 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3795 usec_t extend_timeout_usec
;
3796 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3797 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3799 service_extend_timeout(s
, extend_timeout_usec
);
3802 /* Interpret WATCHDOG= */
3803 if (strv_find(tags
, "WATCHDOG=1"))
3804 service_reset_watchdog(s
);
3806 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
3808 usec_t watchdog_override_usec
;
3809 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
3810 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
3812 service_override_watchdog_timeout(s
, watchdog_override_usec
);
3815 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3816 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3817 * fds, but optional when pushing in new fds, for compatibility reasons. */
3818 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
3821 name
= strv_find_startswith(tags
, "FDNAME=");
3822 if (!name
|| !fdname_is_valid(name
))
3823 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3825 service_remove_fd_store(s
, name
);
3827 } else if (strv_find(tags
, "FDSTORE=1")) {
3830 name
= strv_find_startswith(tags
, "FDNAME=");
3831 if (name
&& !fdname_is_valid(name
)) {
3832 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
3836 (void) service_add_fd_store_set(s
, fds
, name
);
3839 /* Notify clients about changed status or main pid */
3841 unit_add_to_dbus_queue(u
);
3844 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
3845 Service
*s
= SERVICE(u
);
3849 if (!s
->timer_event_source
)
3852 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3855 if (t
== USEC_INFINITY
)
3862 static void service_bus_name_owner_change(
3865 const char *old_owner
,
3866 const char *new_owner
) {
3868 Service
*s
= SERVICE(u
);
3874 assert(streq(s
->bus_name
, name
));
3875 assert(old_owner
|| new_owner
);
3877 if (old_owner
&& new_owner
)
3878 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", name
, old_owner
, new_owner
);
3880 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", name
, old_owner
);
3882 log_unit_debug(u
, "D-Bus name %s now registered by %s", name
, new_owner
);
3884 s
->bus_name_good
= !!new_owner
;
3886 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3887 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
3889 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
3893 if (s
->type
== SERVICE_DBUS
) {
3895 /* service_enter_running() will figure out what to
3897 if (s
->state
== SERVICE_RUNNING
)
3898 service_enter_running(s
, SERVICE_SUCCESS
);
3899 else if (s
->state
== SERVICE_START
&& new_owner
)
3900 service_enter_start_post(s
);
3902 } else if (new_owner
&&
3910 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
3913 /* Try to acquire PID from bus service */
3915 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, name
, SD_BUS_CREDS_PID
, &creds
);
3917 r
= sd_bus_creds_get_pid(creds
, &pid
);
3919 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, name
, pid
);
3921 service_set_main_pid(s
, pid
);
3922 unit_watch_pid(UNIT(s
), pid
);
3927 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
3928 _cleanup_free_
char *peer
= NULL
;
3934 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3935 * to be configured. We take ownership of the passed fd on success. */
3937 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
3940 if (s
->socket_fd
>= 0)
3943 if (s
->state
!= SERVICE_DEAD
)
3946 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
3948 if (UNIT(s
)->description
) {
3949 _cleanup_free_
char *a
;
3951 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
3955 r
= unit_set_description(UNIT(s
), a
);
3957 r
= unit_set_description(UNIT(s
), peer
);
3963 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
3968 s
->socket_fd_selinux_context_net
= selinux_context_net
;
3970 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
3974 static void service_reset_failed(Unit
*u
) {
3975 Service
*s
= SERVICE(u
);
3979 if (s
->state
== SERVICE_FAILED
)
3980 service_set_state(s
, SERVICE_DEAD
);
3982 s
->result
= SERVICE_SUCCESS
;
3983 s
->reload_result
= SERVICE_SUCCESS
;
3985 s
->flush_n_restarts
= false;
3988 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
3989 Service
*s
= SERVICE(u
);
3993 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
3996 static int service_main_pid(Unit
*u
) {
3997 Service
*s
= SERVICE(u
);
4004 static int service_control_pid(Unit
*u
) {
4005 Service
*s
= SERVICE(u
);
4009 return s
->control_pid
;
4012 static bool service_needs_console(Unit
*u
) {
4013 Service
*s
= SERVICE(u
);
4017 /* We provide our own implementation of this here, instead of relying of the generic implementation
4018 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4020 if (!exec_context_may_touch_console(&s
->exec_context
))
4023 return IN_SET(s
->state
,
4030 SERVICE_STOP_WATCHDOG
,
4031 SERVICE_STOP_SIGTERM
,
4032 SERVICE_STOP_SIGKILL
,
4034 SERVICE_FINAL_SIGTERM
,
4035 SERVICE_FINAL_SIGKILL
);
4038 static int service_exit_status(Unit
*u
) {
4039 Service
*s
= SERVICE(u
);
4043 if (s
->main_exec_status
.pid
<= 0 ||
4044 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4047 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4050 return s
->main_exec_status
.status
;
4053 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4054 [SERVICE_RESTART_NO
] = "no",
4055 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4056 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4057 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4058 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4059 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4060 [SERVICE_RESTART_ALWAYS
] = "always",
4063 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4065 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4066 [SERVICE_SIMPLE
] = "simple",
4067 [SERVICE_FORKING
] = "forking",
4068 [SERVICE_ONESHOT
] = "oneshot",
4069 [SERVICE_DBUS
] = "dbus",
4070 [SERVICE_NOTIFY
] = "notify",
4071 [SERVICE_IDLE
] = "idle",
4072 [SERVICE_EXEC
] = "exec",
4075 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4077 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4078 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4079 [SERVICE_EXEC_START
] = "ExecStart",
4080 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4081 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4082 [SERVICE_EXEC_STOP
] = "ExecStop",
4083 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4086 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4088 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4089 [NOTIFY_UNKNOWN
] = "unknown",
4090 [NOTIFY_READY
] = "ready",
4091 [NOTIFY_RELOADING
] = "reloading",
4092 [NOTIFY_STOPPING
] = "stopping",
4095 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4097 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4098 [SERVICE_SUCCESS
] = "success",
4099 [SERVICE_FAILURE_RESOURCES
] = "resources",
4100 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4101 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4102 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4103 [SERVICE_FAILURE_SIGNAL
] = "signal",
4104 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4105 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4106 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4109 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4111 const UnitVTable service_vtable
= {
4112 .object_size
= sizeof(Service
),
4113 .exec_context_offset
= offsetof(Service
, exec_context
),
4114 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4115 .kill_context_offset
= offsetof(Service
, kill_context
),
4116 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4117 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4123 .private_section
= "Service",
4125 .can_transient
= true,
4126 .can_delegate
= true,
4128 .init
= service_init
,
4129 .done
= service_done
,
4130 .load
= service_load
,
4131 .release_resources
= service_release_resources
,
4133 .coldplug
= service_coldplug
,
4135 .dump
= service_dump
,
4137 .start
= service_start
,
4138 .stop
= service_stop
,
4139 .reload
= service_reload
,
4141 .can_reload
= service_can_reload
,
4143 .kill
= service_kill
,
4145 .serialize
= service_serialize
,
4146 .deserialize_item
= service_deserialize_item
,
4148 .active_state
= service_active_state
,
4149 .sub_state_to_string
= service_sub_state_to_string
,
4151 .will_restart
= service_will_restart
,
4153 .may_gc
= service_may_gc
,
4155 .sigchld_event
= service_sigchld_event
,
4157 .reset_failed
= service_reset_failed
,
4159 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4160 .notify_message
= service_notify_message
,
4162 .main_pid
= service_main_pid
,
4163 .control_pid
= service_control_pid
,
4165 .bus_name_owner_change
= service_bus_name_owner_change
,
4167 .bus_vtable
= bus_service_vtable
,
4168 .bus_set_property
= bus_service_set_property
,
4169 .bus_commit_properties
= bus_service_commit_properties
,
4171 .get_timeout
= service_get_timeout
,
4172 .needs_console
= service_needs_console
,
4173 .exit_status
= service_exit_status
,
4175 .status_message_formats
= {
4176 .starting_stopping
= {
4177 [0] = "Starting %s...",
4178 [1] = "Stopping %s...",
4180 .finished_start_job
= {
4181 [JOB_DONE
] = "Started %s.",
4182 [JOB_FAILED
] = "Failed to start %s.",
4184 .finished_stop_job
= {
4185 [JOB_DONE
] = "Stopped %s.",
4186 [JOB_FAILED
] = "Stopped (with error) %s.",