1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "sd-messages.h"
11 #include "alloc-util.h"
13 #include "bus-error.h"
14 #include "bus-kernel.h"
16 #include "dbus-service.h"
17 #include "dbus-unit.h"
21 #include "exit-status.h"
24 #include "format-util.h"
26 #include "load-dropin.h"
27 #include "load-fragment.h"
30 #include "parse-util.h"
31 #include "path-util.h"
32 #include "process-util.h"
33 #include "serialize.h"
35 #include "signal-util.h"
37 #include "stdio-util.h"
38 #include "string-table.h"
39 #include "string-util.h"
41 #include "unit-name.h"
46 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
47 [SERVICE_DEAD
] = UNIT_INACTIVE
,
48 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
49 [SERVICE_START
] = UNIT_ACTIVATING
,
50 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
51 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
52 [SERVICE_EXITED
] = UNIT_ACTIVE
,
53 [SERVICE_RELOAD
] = UNIT_RELOADING
,
54 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
55 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
59 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
60 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
61 [SERVICE_FAILED
] = UNIT_FAILED
,
62 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
65 /* For Type=idle we never want to delay any other jobs, hence we
66 * consider idle jobs active as soon as we start working on them */
67 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
68 [SERVICE_DEAD
] = UNIT_INACTIVE
,
69 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
70 [SERVICE_START
] = UNIT_ACTIVE
,
71 [SERVICE_START_POST
] = UNIT_ACTIVE
,
72 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
73 [SERVICE_EXITED
] = UNIT_ACTIVE
,
74 [SERVICE_RELOAD
] = UNIT_RELOADING
,
75 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
76 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
77 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
78 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
79 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
80 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
81 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
82 [SERVICE_FAILED
] = UNIT_FAILED
,
83 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
86 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
87 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
88 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
89 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
91 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
92 static void service_enter_reload_by_notify(Service
*s
);
94 static void service_init(Unit
*u
) {
95 Service
*s
= SERVICE(u
);
98 assert(u
->load_state
== UNIT_STUB
);
100 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
101 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
102 s
->restart_usec
= u
->manager
->default_restart_usec
;
103 s
->runtime_max_usec
= USEC_INFINITY
;
104 s
->type
= _SERVICE_TYPE_INVALID
;
106 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
107 s
->guess_main_pid
= true;
109 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
111 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
112 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
114 s
->watchdog_original_usec
= USEC_INFINITY
;
117 static void service_unwatch_control_pid(Service
*s
) {
120 if (s
->control_pid
<= 0)
123 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
127 static void service_unwatch_main_pid(Service
*s
) {
130 if (s
->main_pid
<= 0)
133 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
137 static void service_unwatch_pid_file(Service
*s
) {
138 if (!s
->pid_file_pathspec
)
141 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
142 path_spec_unwatch(s
->pid_file_pathspec
);
143 path_spec_done(s
->pid_file_pathspec
);
144 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
147 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;
166 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
168 if (s
->main_pid_alien
)
169 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
174 void service_close_socket_fd(Service
*s
) {
177 /* Undo the effect of service_set_socket_fd(). */
179 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
181 if (UNIT_ISSET(s
->accept_socket
)) {
182 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
183 unit_ref_unset(&s
->accept_socket
);
187 static void service_stop_watchdog(Service
*s
) {
190 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
191 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
194 static usec_t
service_get_watchdog_usec(Service
*s
) {
197 if (s
->watchdog_override_enable
)
198 return s
->watchdog_override_usec
;
200 return s
->watchdog_original_usec
;
203 static void service_start_watchdog(Service
*s
) {
204 usec_t watchdog_usec
;
209 watchdog_usec
= service_get_watchdog_usec(s
);
210 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
211 service_stop_watchdog(s
);
215 if (s
->watchdog_event_source
) {
216 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
218 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
222 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
224 r
= sd_event_add_time(
225 UNIT(s
)->manager
->event
,
226 &s
->watchdog_event_source
,
228 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
229 service_dispatch_watchdog
, s
);
231 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
235 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
237 /* Let's process everything else which might be a sign
238 * of living before we consider a service died. */
239 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
242 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
245 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
251 /* Extends the specified event source timer to at least the specified time, unless it is already later
257 r
= sd_event_source_get_time(source
, ¤t
);
260 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
261 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
265 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
268 r
= sd_event_source_set_time(source
, extended
);
271 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
272 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
276 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
281 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
284 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
286 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
287 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
290 static void service_reset_watchdog(Service
*s
) {
293 dual_timestamp_get(&s
->watchdog_timestamp
);
294 service_start_watchdog(s
);
297 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
300 s
->watchdog_override_enable
= true;
301 s
->watchdog_override_usec
= watchdog_override_usec
;
302 service_reset_watchdog(s
);
304 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
305 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
308 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
314 assert(fs
->service
->n_fd_store
> 0);
315 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
316 fs
->service
->n_fd_store
--;
319 if (fs
->event_source
) {
320 sd_event_source_set_enabled(fs
->event_source
, SD_EVENT_OFF
);
321 sd_event_source_unref(fs
->event_source
);
329 static void service_release_fd_store(Service
*s
) {
332 if (s
->n_keep_fd_store
> 0)
335 log_unit_debug(UNIT(s
), "Releasing all stored fds");
337 service_fd_store_unlink(s
->fd_store
);
339 assert(s
->n_fd_store
== 0);
342 static void service_release_resources(Unit
*u
) {
343 Service
*s
= SERVICE(u
);
347 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
350 log_unit_debug(u
, "Releasing resources.");
352 s
->stdin_fd
= safe_close(s
->stdin_fd
);
353 s
->stdout_fd
= safe_close(s
->stdout_fd
);
354 s
->stderr_fd
= safe_close(s
->stderr_fd
);
356 service_release_fd_store(s
);
359 static void service_done(Unit
*u
) {
360 Service
*s
= SERVICE(u
);
364 s
->pid_file
= mfree(s
->pid_file
);
365 s
->status_text
= mfree(s
->status_text
);
367 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
368 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
369 s
->control_command
= NULL
;
370 s
->main_command
= NULL
;
372 dynamic_creds_unref(&s
->dynamic_creds
);
374 exit_status_set_free(&s
->restart_prevent_status
);
375 exit_status_set_free(&s
->restart_force_status
);
376 exit_status_set_free(&s
->success_status
);
378 /* This will leak a process, but at least no memory or any of
380 service_unwatch_main_pid(s
);
381 service_unwatch_control_pid(s
);
382 service_unwatch_pid_file(s
);
385 unit_unwatch_bus_name(u
, s
->bus_name
);
386 s
->bus_name
= mfree(s
->bus_name
);
389 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
391 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
392 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
394 service_close_socket_fd(s
);
395 s
->peer
= socket_peer_unref(s
->peer
);
397 unit_ref_unset(&s
->accept_socket
);
399 service_stop_watchdog(s
);
401 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
402 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
404 service_release_resources(u
);
407 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
408 ServiceFDStore
*fs
= userdata
;
413 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
414 log_unit_debug(UNIT(fs
->service
),
415 "Received %s on stored fd %d (%s), closing.",
416 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
417 fs
->fd
, strna(fs
->fdname
));
418 service_fd_store_unlink(fs
);
422 static int service_add_fd_store(Service
*s
, int fd
, const char *name
) {
426 /* fd is always consumed if we return >= 0 */
431 if (s
->n_fd_store
>= s
->n_fd_store_max
)
432 return -EXFULL
; /* Our store is full.
433 * Use this errno rather than E[NM]FILE to distinguish from
434 * the case where systemd itself hits the file limit. */
436 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
437 r
= same_fd(fs
->fd
, fd
);
442 return 0; /* fd already included */
446 fs
= new0(ServiceFDStore
, 1);
452 fs
->fdname
= strdup(name
?: "stored");
458 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
459 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
464 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
466 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
469 return 1; /* fd newly stored */
472 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
) {
477 while (fdset_size(fds
) > 0) {
478 _cleanup_close_
int fd
= -1;
480 fd
= fdset_steal_first(fds
);
484 r
= service_add_fd_store(s
, fd
, name
);
486 return log_unit_warning_errno(UNIT(s
), r
,
487 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
490 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
492 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
499 static void service_remove_fd_store(Service
*s
, const char *name
) {
500 ServiceFDStore
*fs
, *n
;
505 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
506 if (!streq(fs
->fdname
, name
))
509 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
510 service_fd_store_unlink(fs
);
514 static int service_arm_timer(Service
*s
, usec_t usec
) {
519 if (s
->timer_event_source
) {
520 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
524 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
527 if (usec
== USEC_INFINITY
)
530 r
= sd_event_add_time(
531 UNIT(s
)->manager
->event
,
532 &s
->timer_event_source
,
535 service_dispatch_timer
, s
);
539 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
544 static int service_verify(Service
*s
) {
547 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
550 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
551 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
552 /* FailureAction= only makes sense if one of the start or stop commands is specified.
553 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
554 * either a command or SuccessAction= are required. */
556 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
560 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
561 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
565 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
566 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
570 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
571 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
575 if (s
->type
== SERVICE_ONESHOT
&& s
->restart
!= SERVICE_RESTART_NO
) {
576 log_unit_error(UNIT(s
), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
580 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
581 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
585 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
586 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
590 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
591 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
593 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
594 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
598 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
599 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
601 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
602 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
604 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
605 log_unit_warning(UNIT(s
), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
610 static int service_add_default_dependencies(Service
*s
) {
615 if (!UNIT(s
)->default_dependencies
)
618 /* Add a number of automatic dependencies useful for the
619 * majority of services. */
621 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
622 /* First, pull in the really early boot stuff, and
623 * require it, so that we fail if we can't acquire
626 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
631 /* In the --user instance there's no sysinit.target,
632 * in that case require basic.target instead. */
634 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
639 /* Second, if the rest of the base system is in the same
640 * transaction, order us after it, but do not pull it in or
641 * even require it. */
642 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
646 /* Third, add us in for normal shutdown. */
647 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
650 static void service_fix_output(Service
*s
) {
653 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
654 * however, since in that case we want output to default to the same place as we read input from. */
656 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
657 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
658 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
659 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
661 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
662 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
663 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
665 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
666 s
->exec_context
.stdin_data_size
> 0)
667 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
670 static int service_setup_bus_name(Service
*s
) {
678 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
680 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
682 /* We always want to be ordered against dbus.socket if both are in the transaction. */
683 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
685 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
687 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
689 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
691 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
696 static int service_add_extras(Service
*s
) {
701 if (s
->type
== _SERVICE_TYPE_INVALID
) {
702 /* Figure out a type automatically */
704 s
->type
= SERVICE_DBUS
;
705 else if (s
->exec_command
[SERVICE_EXEC_START
])
706 s
->type
= SERVICE_SIMPLE
;
708 s
->type
= SERVICE_ONESHOT
;
711 /* Oneshot services have disabled start timeout by default */
712 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
713 s
->timeout_start_usec
= USEC_INFINITY
;
715 service_fix_output(s
);
717 r
= unit_patch_contexts(UNIT(s
));
721 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
725 r
= unit_set_default_slice(UNIT(s
));
729 /* If the service needs the notify socket, let's enable it automatically. */
730 if (s
->notify_access
== NOTIFY_NONE
&&
731 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
732 s
->notify_access
= NOTIFY_MAIN
;
734 r
= service_add_default_dependencies(s
);
738 r
= service_setup_bus_name(s
);
745 static int service_load(Unit
*u
) {
746 Service
*s
= SERVICE(u
);
751 /* Load a .service file */
752 r
= unit_load_fragment(u
);
756 /* Still nothing found? Then let's give up */
757 if (u
->load_state
== UNIT_STUB
)
760 /* This is a new unit? Then let's add in some extras */
761 if (u
->load_state
== UNIT_LOADED
) {
763 /* We were able to load something, then let's add in
764 * the dropin directories. */
765 r
= unit_load_dropin(u
);
769 /* This is a new unit? Then let's add in some
771 r
= service_add_extras(s
);
776 return service_verify(s
);
779 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
780 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
];
781 char buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
];
782 ServiceExecCommand c
;
783 Service
*s
= SERVICE(u
);
788 prefix
= strempty(prefix
);
789 prefix2
= strjoina(prefix
, "\t");
792 "%sService State: %s\n"
794 "%sReload Result: %s\n"
795 "%sPermissionsStartOnly: %s\n"
796 "%sRootDirectoryStartOnly: %s\n"
797 "%sRemainAfterExit: %s\n"
798 "%sGuessMainPID: %s\n"
801 "%sNotifyAccess: %s\n"
802 "%sNotifyState: %s\n",
803 prefix
, service_state_to_string(s
->state
),
804 prefix
, service_result_to_string(s
->result
),
805 prefix
, service_result_to_string(s
->reload_result
),
806 prefix
, yes_no(s
->permissions_start_only
),
807 prefix
, yes_no(s
->root_directory_start_only
),
808 prefix
, yes_no(s
->remain_after_exit
),
809 prefix
, yes_no(s
->guess_main_pid
),
810 prefix
, service_type_to_string(s
->type
),
811 prefix
, service_restart_to_string(s
->restart
),
812 prefix
, notify_access_to_string(s
->notify_access
),
813 prefix
, notify_state_to_string(s
->notify_state
));
815 if (s
->control_pid
> 0)
817 "%sControl PID: "PID_FMT
"\n",
818 prefix
, s
->control_pid
);
822 "%sMain PID: "PID_FMT
"\n"
823 "%sMain PID Known: %s\n"
824 "%sMain PID Alien: %s\n",
826 prefix
, yes_no(s
->main_pid_known
),
827 prefix
, yes_no(s
->main_pid_alien
));
832 prefix
, s
->pid_file
);
837 "%sBus Name Good: %s\n",
839 prefix
, yes_no(s
->bus_name_good
));
841 if (UNIT_ISSET(s
->accept_socket
))
843 "%sAccept Socket: %s\n",
844 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
848 "%sTimeoutStartSec: %s\n"
849 "%sTimeoutStopSec: %s\n"
850 "%sRuntimeMaxSec: %s\n"
851 "%sWatchdogSec: %s\n",
852 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
853 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
854 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
855 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
856 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
858 kill_context_dump(&s
->kill_context
, f
, prefix
);
859 exec_context_dump(&s
->exec_context
, f
, prefix
);
861 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
863 if (!s
->exec_command
[c
])
866 fprintf(f
, "%s-> %s:\n",
867 prefix
, service_exec_command_to_string(c
));
869 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
873 fprintf(f
, "%sStatus Text: %s\n",
874 prefix
, s
->status_text
);
876 if (s
->n_fd_store_max
> 0)
878 "%sFile Descriptor Store Max: %u\n"
879 "%sFile Descriptor Store Current: %zu\n",
880 prefix
, s
->n_fd_store_max
,
881 prefix
, s
->n_fd_store
);
883 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
886 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
890 assert(pid_is_valid(pid
));
892 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
893 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
896 if (pid
== getpid_cached() || pid
== 1) {
897 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
901 if (pid
== s
->control_pid
) {
902 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
906 if (!pid_is_alive(pid
)) {
907 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
911 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
912 if (owner
== UNIT(s
)) {
913 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
914 return 1; /* Yay, it's definitely a good PID */
917 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
920 static int service_load_pid_file(Service
*s
, bool may_warn
) {
921 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
922 bool questionable_pid_file
= false;
923 _cleanup_free_
char *k
= NULL
;
924 _cleanup_close_
int fd
= -1;
933 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
935 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
936 if (fd
== -ENOLINK
) {
937 log_unit_full(UNIT(s
), LOG_DEBUG
, fd
, "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
939 questionable_pid_file
= true;
941 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
944 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
));
946 /* 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. */
947 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
948 r
= read_one_line_file(procfs
, &k
);
950 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
);
952 r
= parse_pid(k
, &pid
);
954 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
956 if (s
->main_pid_known
&& pid
== s
->main_pid
)
959 r
= service_is_suitable_main_pid(s
, pid
, prio
);
965 if (questionable_pid_file
) {
966 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
970 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
972 if (fstat(fd
, &st
) < 0)
973 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
975 if (st
.st_uid
!= 0) {
976 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
);
980 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
);
983 if (s
->main_pid_known
) {
984 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
986 service_unwatch_main_pid(s
);
987 s
->main_pid_known
= false;
989 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
991 r
= service_set_main_pid(s
, pid
);
995 r
= unit_watch_pid(UNIT(s
), pid
, false);
996 if (r
< 0) /* FIXME: we need to do something here */
997 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1002 static void service_search_main_pid(Service
*s
) {
1008 /* If we know it anyway, don't ever fallback to unreliable
1010 if (s
->main_pid_known
)
1013 if (!s
->guess_main_pid
)
1016 assert(s
->main_pid
<= 0);
1018 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1021 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1022 if (service_set_main_pid(s
, pid
) < 0)
1025 r
= unit_watch_pid(UNIT(s
), pid
, false);
1027 /* FIXME: we need to do something here */
1028 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1031 static void service_set_state(Service
*s
, ServiceState state
) {
1032 ServiceState old_state
;
1033 const UnitActiveState
*table
;
1037 if (s
->state
!= state
)
1038 bus_unit_send_pending_change_signal(UNIT(s
), false);
1040 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1042 old_state
= s
->state
;
1045 service_unwatch_pid_file(s
);
1048 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1051 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1052 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1053 SERVICE_AUTO_RESTART
))
1054 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1057 SERVICE_START
, SERVICE_START_POST
,
1058 SERVICE_RUNNING
, SERVICE_RELOAD
,
1059 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1060 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1061 service_unwatch_main_pid(s
);
1062 s
->main_command
= NULL
;
1066 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1068 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1069 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1070 service_unwatch_control_pid(s
);
1071 s
->control_command
= NULL
;
1072 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1075 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1076 unit_unwatch_all_pids(UNIT(s
));
1077 unit_dequeue_rewatch_pids(UNIT(s
));
1081 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1082 SERVICE_RUNNING
, SERVICE_RELOAD
,
1083 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1084 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1085 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1086 service_close_socket_fd(s
);
1088 if (state
!= SERVICE_START
)
1089 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1091 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1092 service_stop_watchdog(s
);
1094 /* For the inactive states unit_notify() will trim the cgroup,
1095 * but for exit we have to do that ourselves... */
1096 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1097 unit_prune_cgroup(UNIT(s
));
1099 if (old_state
!= state
)
1100 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1102 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1103 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1104 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1107 static usec_t
service_coldplug_timeout(Service
*s
) {
1110 switch (s
->deserialized_state
) {
1112 case SERVICE_START_PRE
:
1114 case SERVICE_START_POST
:
1115 case SERVICE_RELOAD
:
1116 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1118 case SERVICE_RUNNING
:
1119 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1122 case SERVICE_STOP_WATCHDOG
:
1123 case SERVICE_STOP_SIGTERM
:
1124 case SERVICE_STOP_SIGKILL
:
1125 case SERVICE_STOP_POST
:
1126 case SERVICE_FINAL_SIGTERM
:
1127 case SERVICE_FINAL_SIGKILL
:
1128 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1130 case SERVICE_AUTO_RESTART
:
1131 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1134 return USEC_INFINITY
;
1138 static int service_coldplug(Unit
*u
) {
1139 Service
*s
= SERVICE(u
);
1143 assert(s
->state
== SERVICE_DEAD
);
1145 if (s
->deserialized_state
== s
->state
)
1148 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1152 if (s
->main_pid
> 0 &&
1153 pid_is_unwaited(s
->main_pid
) &&
1154 (IN_SET(s
->deserialized_state
,
1155 SERVICE_START
, SERVICE_START_POST
,
1156 SERVICE_RUNNING
, SERVICE_RELOAD
,
1157 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1158 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1159 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1164 if (s
->control_pid
> 0 &&
1165 pid_is_unwaited(s
->control_pid
) &&
1166 IN_SET(s
->deserialized_state
,
1167 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1169 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1170 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1171 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1176 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1177 (void) unit_enqueue_rewatch_pids(u
);
1178 (void) unit_setup_dynamic_creds(u
);
1179 (void) unit_setup_exec_runtime(u
);
1182 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1183 service_start_watchdog(s
);
1185 if (UNIT_ISSET(s
->accept_socket
)) {
1186 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1188 if (socket
->max_connections_per_source
> 0) {
1191 /* Make a best-effort attempt at bumping the connection count */
1192 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1193 socket_peer_unref(s
->peer
);
1199 service_set_state(s
, s
->deserialized_state
);
1203 static int service_collect_fds(
1207 size_t *n_socket_fds
,
1208 size_t *n_storage_fds
) {
1210 _cleanup_strv_free_
char **rfd_names
= NULL
;
1211 _cleanup_free_
int *rfds
= NULL
;
1212 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1218 assert(n_socket_fds
);
1219 assert(n_storage_fds
);
1221 if (s
->socket_fd
>= 0) {
1223 /* Pass the per-connection socket */
1228 rfds
[0] = s
->socket_fd
;
1230 rfd_names
= strv_new("connection");
1240 /* Pass all our configured sockets for singleton services */
1242 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1243 _cleanup_free_
int *cfds
= NULL
;
1247 if (u
->type
!= UNIT_SOCKET
)
1252 cn_fds
= socket_collect_fds(sock
, &cfds
);
1260 rfds
= TAKE_PTR(cfds
);
1261 rn_socket_fds
= cn_fds
;
1265 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1269 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1272 rn_socket_fds
+= cn_fds
;
1275 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1281 if (s
->n_fd_store
> 0) {
1287 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1293 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1298 n_fds
= rn_socket_fds
;
1300 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1301 rfds
[n_fds
] = fs
->fd
;
1302 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1303 if (!rfd_names
[n_fds
])
1310 rfd_names
[n_fds
] = NULL
;
1313 *fds
= TAKE_PTR(rfds
);
1314 *fd_names
= TAKE_PTR(rfd_names
);
1315 *n_socket_fds
= rn_socket_fds
;
1316 *n_storage_fds
= rn_storage_fds
;
1321 static int service_allocate_exec_fd_event_source(
1324 sd_event_source
**ret_event_source
) {
1326 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1331 assert(ret_event_source
);
1333 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1335 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1337 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1339 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1341 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1343 (void) sd_event_source_set_description(source
, "service event_fd");
1345 r
= sd_event_source_set_io_fd_own(source
, true);
1347 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1349 *ret_event_source
= TAKE_PTR(source
);
1353 static int service_allocate_exec_fd(
1355 sd_event_source
**ret_event_source
,
1358 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1362 assert(ret_event_source
);
1363 assert(ret_exec_fd
);
1365 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1366 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1368 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1373 *ret_exec_fd
= TAKE_FD(p
[1]);
1378 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1381 /* Notifications are accepted depending on the process and
1382 * the access setting of the service:
1383 * process: \ access: NONE MAIN EXEC ALL
1384 * main no yes yes yes
1385 * control no no yes yes
1386 * other (forked) no no no yes */
1388 if (flags
& EXEC_IS_CONTROL
)
1389 /* A control process */
1390 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1392 /* We only spawn main processes and control processes, so any
1393 * process that is not a control process is a main process */
1394 return s
->notify_access
!= NOTIFY_NONE
;
1397 static int service_spawn(
1404 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1411 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1412 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1413 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1414 _cleanup_close_
int exec_fd
= -1;
1415 _cleanup_free_
int *fds
= NULL
;
1423 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1427 if (flags
& EXEC_IS_CONTROL
) {
1428 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1429 if (s
->permissions_start_only
)
1430 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1431 if (s
->root_directory_start_only
)
1432 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1435 if ((flags
& EXEC_PASS_FDS
) ||
1436 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1437 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1438 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1440 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1444 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1447 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1448 assert(!s
->exec_fd_event_source
);
1450 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1455 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1459 our_env
= new0(char*, 10);
1463 if (service_exec_needs_notify_socket(s
, flags
))
1464 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1467 if (s
->main_pid
> 0)
1468 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1471 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1472 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1476 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1479 if (s
->socket_fd
>= 0) {
1480 union sockaddr_union sa
;
1481 socklen_t salen
= sizeof(sa
);
1483 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1484 * useful. Note that we do this only when we are still connected at this point in time, which we might
1485 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1486 * in ENOTCONN), and just use whate we can use. */
1488 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1489 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1491 _cleanup_free_
char *addr
= NULL
;
1495 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1499 t
= strappend("REMOTE_ADDR=", addr
);
1502 our_env
[n_env
++] = t
;
1504 r
= sockaddr_port(&sa
.sa
, &port
);
1508 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1510 our_env
[n_env
++] = t
;
1514 if (flags
& EXEC_SETENV_RESULT
) {
1515 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1518 if (s
->main_exec_status
.pid
> 0 &&
1519 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1520 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1523 if (s
->main_exec_status
.code
== CLD_EXITED
)
1524 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1526 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1532 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1536 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1540 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1541 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1542 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1544 strv_free_and_replace(exec_params
.environment
, final_env
);
1545 exec_params
.fds
= fds
;
1546 exec_params
.fd_names
= fd_names
;
1547 exec_params
.n_socket_fds
= n_socket_fds
;
1548 exec_params
.n_storage_fds
= n_storage_fds
;
1549 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1550 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1551 if (s
->type
== SERVICE_IDLE
)
1552 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1553 exec_params
.stdin_fd
= s
->stdin_fd
;
1554 exec_params
.stdout_fd
= s
->stdout_fd
;
1555 exec_params
.stderr_fd
= s
->stderr_fd
;
1556 exec_params
.exec_fd
= exec_fd
;
1558 r
= exec_spawn(UNIT(s
),
1568 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1569 s
->exec_fd_hot
= false;
1571 r
= unit_watch_pid(UNIT(s
), pid
, true);
1580 static int main_pid_good(Service
*s
) {
1583 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1585 /* If we know the pid file, then let's just check if it is
1587 if (s
->main_pid_known
) {
1589 /* If it's an alien child let's check if it is still
1591 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1592 return pid_is_alive(s
->main_pid
);
1594 /* .. otherwise assume we'll get a SIGCHLD for it,
1595 * which we really should wait for to collect exit
1596 * status and code */
1597 return s
->main_pid
> 0;
1600 /* We don't know the pid */
1604 static int control_pid_good(Service
*s
) {
1607 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1608 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1609 * means: we can't figure it out. */
1611 return s
->control_pid
> 0;
1614 static int cgroup_good(Service
*s
) {
1619 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1622 if (!UNIT(s
)->cgroup_path
)
1625 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1632 static bool service_shall_restart(Service
*s
) {
1635 /* Don't restart after manual stops */
1636 if (s
->forbid_restart
)
1639 /* Never restart if this is configured as special exception */
1640 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1643 /* Restart if the exit code/status are configured as restart triggers */
1644 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1647 switch (s
->restart
) {
1649 case SERVICE_RESTART_NO
:
1652 case SERVICE_RESTART_ALWAYS
:
1655 case SERVICE_RESTART_ON_SUCCESS
:
1656 return s
->result
== SERVICE_SUCCESS
;
1658 case SERVICE_RESTART_ON_FAILURE
:
1659 return s
->result
!= SERVICE_SUCCESS
;
1661 case SERVICE_RESTART_ON_ABNORMAL
:
1662 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1664 case SERVICE_RESTART_ON_WATCHDOG
:
1665 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1667 case SERVICE_RESTART_ON_ABORT
:
1668 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1671 assert_not_reached("unknown restart setting");
1675 static bool service_will_restart(Unit
*u
) {
1676 Service
*s
= SERVICE(u
);
1680 if (s
->will_auto_restart
)
1682 if (s
->state
== SERVICE_AUTO_RESTART
)
1686 if (UNIT(s
)->job
->type
== JOB_START
)
1692 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1697 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1698 * undo what has already been enqueued. */
1699 if (unit_stop_pending(UNIT(s
)))
1700 allow_restart
= false;
1702 if (s
->result
== SERVICE_SUCCESS
)
1705 unit_log_result(UNIT(s
), s
->result
== SERVICE_SUCCESS
, service_result_to_string(s
->result
));
1707 if (allow_restart
&& service_shall_restart(s
))
1708 s
->will_auto_restart
= true;
1710 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1711 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1712 s
->n_keep_fd_store
++;
1714 service_set_state(s
, s
->result
!= SERVICE_SUCCESS
? SERVICE_FAILED
: SERVICE_DEAD
);
1716 if (s
->will_auto_restart
) {
1717 s
->will_auto_restart
= false;
1719 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1721 s
->n_keep_fd_store
--;
1725 service_set_state(s
, SERVICE_AUTO_RESTART
);
1727 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1728 * user can still introspect the counter. Do so on the next start. */
1729 s
->flush_n_restarts
= true;
1731 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1732 * queue, so that the fd store is possibly gc'ed again */
1733 s
->n_keep_fd_store
--;
1734 unit_add_to_gc_queue(UNIT(s
));
1736 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1737 s
->forbid_restart
= false;
1739 /* We want fresh tmpdirs in case service is started again immediately */
1740 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1742 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1743 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1744 /* Also, remove the runtime directory */
1745 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1747 /* Get rid of the IPC bits of the user */
1748 unit_unref_uid_gid(UNIT(s
), true);
1750 /* Release the user, and destroy it if we are the only remaining owner */
1751 dynamic_creds_destroy(&s
->dynamic_creds
);
1753 /* Try to delete the pid file. At this point it will be
1754 * out-of-date, and some software might be confused by it, so
1755 * let's remove it. */
1757 (void) unlink(s
->pid_file
);
1759 /* Reset TTY ownership if necessary */
1760 exec_context_revert_tty(&s
->exec_context
);
1765 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1766 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1769 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1773 if (s
->result
== SERVICE_SUCCESS
)
1776 service_unwatch_control_pid(s
);
1777 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1779 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1780 if (s
->control_command
) {
1781 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1783 r
= service_spawn(s
,
1785 s
->timeout_stop_usec
,
1786 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1791 service_set_state(s
, SERVICE_STOP_POST
);
1793 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1798 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1799 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1802 static int state_to_kill_operation(ServiceState state
) {
1805 case SERVICE_STOP_WATCHDOG
:
1806 return KILL_WATCHDOG
;
1808 case SERVICE_STOP_SIGTERM
:
1809 case SERVICE_FINAL_SIGTERM
:
1810 return KILL_TERMINATE
;
1812 case SERVICE_STOP_SIGKILL
:
1813 case SERVICE_FINAL_SIGKILL
:
1817 return _KILL_OPERATION_INVALID
;
1821 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1826 if (s
->result
== SERVICE_SUCCESS
)
1829 /* Before sending any signal, make sure we track all members of this cgroup */
1830 (void) unit_watch_all_pids(UNIT(s
));
1832 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1834 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1836 r
= unit_kill_context(
1839 state_to_kill_operation(state
),
1847 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1851 service_set_state(s
, state
);
1852 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1853 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1854 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1855 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1856 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1857 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1859 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1864 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1866 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1867 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1869 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1872 static void service_enter_stop_by_notify(Service
*s
) {
1875 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1877 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1879 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1880 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1883 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1888 if (s
->result
== SERVICE_SUCCESS
)
1891 service_unwatch_control_pid(s
);
1892 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1894 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1895 if (s
->control_command
) {
1896 s
->control_command_id
= SERVICE_EXEC_STOP
;
1898 r
= service_spawn(s
,
1900 s
->timeout_stop_usec
,
1901 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1906 service_set_state(s
, SERVICE_STOP
);
1908 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1913 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1914 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1917 static bool service_good(Service
*s
) {
1921 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1924 main_pid_ok
= main_pid_good(s
);
1925 if (main_pid_ok
> 0) /* It's alive */
1927 if (main_pid_ok
== 0) /* It's dead */
1930 /* OK, we don't know anything about the main PID, maybe
1931 * because there is none. Let's check the control group
1934 return cgroup_good(s
) != 0;
1937 static void service_enter_running(Service
*s
, ServiceResult f
) {
1940 if (s
->result
== SERVICE_SUCCESS
)
1943 service_unwatch_control_pid(s
);
1945 if (s
->result
!= SERVICE_SUCCESS
)
1946 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1947 else if (service_good(s
)) {
1949 /* If there are any queued up sd_notify() notifications, process them now */
1950 if (s
->notify_state
== NOTIFY_RELOADING
)
1951 service_enter_reload_by_notify(s
);
1952 else if (s
->notify_state
== NOTIFY_STOPPING
)
1953 service_enter_stop_by_notify(s
);
1955 service_set_state(s
, SERVICE_RUNNING
);
1956 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
1959 } else if (s
->remain_after_exit
)
1960 service_set_state(s
, SERVICE_EXITED
);
1962 service_enter_stop(s
, SERVICE_SUCCESS
);
1965 static void service_enter_start_post(Service
*s
) {
1969 service_unwatch_control_pid(s
);
1970 service_reset_watchdog(s
);
1972 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
1973 if (s
->control_command
) {
1974 s
->control_command_id
= SERVICE_EXEC_START_POST
;
1976 r
= service_spawn(s
,
1978 s
->timeout_start_usec
,
1979 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
1984 service_set_state(s
, SERVICE_START_POST
);
1986 service_enter_running(s
, SERVICE_SUCCESS
);
1991 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
1992 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
1995 static void service_kill_control_process(Service
*s
) {
2000 if (s
->control_pid
<= 0)
2003 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2005 _cleanup_free_
char *comm
= NULL
;
2007 (void) get_process_comm(s
->control_pid
, &comm
);
2009 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2010 s
->control_pid
, strna(comm
));
2014 static int service_adverse_to_leftover_processes(Service
*s
) {
2017 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2018 * SendSIGKILL is used for services that require a clean shutdown. These are typically database
2019 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or
2020 * startup time is quite variable (so Timeout settings aren't of use).
2022 * Here we take these two factors and refuse to start a service if there are existing processes
2023 * within a control group. Databases, while generally having some protection against multiple
2024 * instances running, lets not stress the rigor of these. Also ExecStartPre parts of the service
2025 * aren't as rigoriously written to protect aganst against multiple use. */
2026 if (unit_warn_leftover_processes(UNIT(s
)) &&
2027 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2028 !s
->kill_context
.send_sigkill
) {
2029 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");
2034 static void service_enter_start(Service
*s
) {
2042 service_unwatch_control_pid(s
);
2043 service_unwatch_main_pid(s
);
2045 r
= service_adverse_to_leftover_processes(s
);
2049 if (s
->type
== SERVICE_FORKING
) {
2050 s
->control_command_id
= SERVICE_EXEC_START
;
2051 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2053 s
->main_command
= NULL
;
2055 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2056 s
->control_command
= NULL
;
2058 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2062 if (s
->type
!= SERVICE_ONESHOT
) {
2063 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2064 * happen if the configuration changes at runtime. In this case, let's enter a failure
2066 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2071 /* We force a fake state transition here. Otherwise, the unit would go directly from
2072 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2073 * inbetween. This way we can later trigger actions that depend on the state
2074 * transition, including SuccessAction=. */
2075 service_set_state(s
, SERVICE_START
);
2077 service_enter_start_post(s
);
2081 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2082 /* For simple + idle this is the main process. We don't apply any timeout here, but
2083 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2084 timeout
= USEC_INFINITY
;
2086 timeout
= s
->timeout_start_usec
;
2088 r
= service_spawn(s
,
2091 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2096 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2097 /* For simple services we immediately start
2098 * the START_POST binaries. */
2100 service_set_main_pid(s
, pid
);
2101 service_enter_start_post(s
);
2103 } else if (s
->type
== SERVICE_FORKING
) {
2105 /* For forking services we wait until the start
2106 * process exited. */
2108 s
->control_pid
= pid
;
2109 service_set_state(s
, SERVICE_START
);
2111 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2113 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2115 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2116 * bus. 'notify' and 'exec' services are similar. */
2118 service_set_main_pid(s
, pid
);
2119 service_set_state(s
, SERVICE_START
);
2121 assert_not_reached("Unknown service type");
2126 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2127 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2130 static void service_enter_start_pre(Service
*s
) {
2135 service_unwatch_control_pid(s
);
2137 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2138 if (s
->control_command
) {
2140 r
= service_adverse_to_leftover_processes(s
);
2144 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2146 r
= service_spawn(s
,
2148 s
->timeout_start_usec
,
2149 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2154 service_set_state(s
, SERVICE_START_PRE
);
2156 service_enter_start(s
);
2161 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2162 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2165 static void service_enter_restart(Service
*s
) {
2166 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2171 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2172 /* Don't restart things if we are going down anyway */
2173 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2175 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2182 /* Any units that are bound to this service must also be
2183 * restarted. We use JOB_RESTART (instead of the more obvious
2184 * JOB_START) here so that those dependency jobs will be added
2186 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2190 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2191 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2192 * explicitly however via the usual "systemctl reset-failure" logic. */
2194 s
->flush_n_restarts
= false;
2196 log_struct(LOG_INFO
,
2197 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2198 LOG_UNIT_ID(UNIT(s
)),
2199 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2200 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2201 "N_RESTARTS=%u", s
->n_restarts
);
2203 /* Notify clients about changed restart counter */
2204 unit_add_to_dbus_queue(UNIT(s
));
2206 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2207 * it will be canceled as part of the service_stop() call that
2208 * is executed as part of JOB_RESTART. */
2213 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2214 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2217 static void service_enter_reload_by_notify(Service
*s
) {
2218 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2223 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2224 service_set_state(s
, SERVICE_RELOAD
);
2226 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2227 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2229 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2232 static void service_enter_reload(Service
*s
) {
2237 service_unwatch_control_pid(s
);
2238 s
->reload_result
= SERVICE_SUCCESS
;
2240 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2241 if (s
->control_command
) {
2242 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2244 r
= service_spawn(s
,
2246 s
->timeout_start_usec
,
2247 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2252 service_set_state(s
, SERVICE_RELOAD
);
2254 service_enter_running(s
, SERVICE_SUCCESS
);
2259 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2260 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2261 service_enter_running(s
, SERVICE_SUCCESS
);
2264 static void service_run_next_control(Service
*s
) {
2269 assert(s
->control_command
);
2270 assert(s
->control_command
->command_next
);
2272 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2274 s
->control_command
= s
->control_command
->command_next
;
2275 service_unwatch_control_pid(s
);
2277 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2278 timeout
= s
->timeout_start_usec
;
2280 timeout
= s
->timeout_stop_usec
;
2282 r
= service_spawn(s
,
2285 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2286 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2287 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2288 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2296 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2298 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2299 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2300 else if (s
->state
== SERVICE_STOP_POST
)
2301 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2302 else if (s
->state
== SERVICE_RELOAD
) {
2303 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2304 service_enter_running(s
, SERVICE_SUCCESS
);
2306 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2309 static void service_run_next_main(Service
*s
) {
2314 assert(s
->main_command
);
2315 assert(s
->main_command
->command_next
);
2316 assert(s
->type
== SERVICE_ONESHOT
);
2318 s
->main_command
= s
->main_command
->command_next
;
2319 service_unwatch_main_pid(s
);
2321 r
= service_spawn(s
,
2323 s
->timeout_start_usec
,
2324 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2329 service_set_main_pid(s
, pid
);
2334 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2335 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2338 static int service_start(Unit
*u
) {
2339 Service
*s
= SERVICE(u
);
2344 /* We cannot fulfill this request right now, try again later
2346 if (IN_SET(s
->state
,
2347 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2348 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2351 /* Already on it! */
2352 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2355 /* A service that will be restarted must be stopped first to
2356 * trigger BindsTo and/or OnFailure dependencies. If a user
2357 * does not want to wait for the holdoff time to elapse, the
2358 * service should be manually restarted, not started. We
2359 * simply return EAGAIN here, so that any start jobs stay
2360 * queued, and assume that the auto restart timer will
2361 * eventually trigger the restart. */
2362 if (s
->state
== SERVICE_AUTO_RESTART
)
2365 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2367 /* Make sure we don't enter a busy loop of some kind. */
2368 r
= unit_test_start_limit(u
);
2370 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2374 r
= unit_acquire_invocation_id(u
);
2378 s
->result
= SERVICE_SUCCESS
;
2379 s
->reload_result
= SERVICE_SUCCESS
;
2380 s
->main_pid_known
= false;
2381 s
->main_pid_alien
= false;
2382 s
->forbid_restart
= false;
2384 s
->status_text
= mfree(s
->status_text
);
2385 s
->status_errno
= 0;
2387 s
->notify_state
= NOTIFY_UNKNOWN
;
2389 s
->watchdog_original_usec
= s
->watchdog_usec
;
2390 s
->watchdog_override_enable
= false;
2391 s
->watchdog_override_usec
= USEC_INFINITY
;
2393 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2394 exec_status_reset(&s
->main_exec_status
);
2396 /* This is not an automatic restart? Flush the restart counter then */
2397 if (s
->flush_n_restarts
) {
2399 s
->flush_n_restarts
= false;
2402 u
->reset_accounting
= true;
2404 service_enter_start_pre(s
);
2408 static int service_stop(Unit
*u
) {
2409 Service
*s
= SERVICE(u
);
2413 /* Don't create restart jobs from manual stops. */
2414 s
->forbid_restart
= true;
2417 if (IN_SET(s
->state
,
2418 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2419 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2422 /* A restart will be scheduled or is in progress. */
2423 if (s
->state
== SERVICE_AUTO_RESTART
) {
2424 service_set_state(s
, SERVICE_DEAD
);
2428 /* If there's already something running we go directly into
2430 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
)) {
2431 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2435 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2437 service_enter_stop(s
, SERVICE_SUCCESS
);
2441 static int service_reload(Unit
*u
) {
2442 Service
*s
= SERVICE(u
);
2446 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2448 service_enter_reload(s
);
2452 _pure_
static bool service_can_reload(Unit
*u
) {
2453 Service
*s
= SERVICE(u
);
2457 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2460 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2461 Service
*s
= SERVICE(u
);
2463 ExecCommand
*first
, *c
;
2467 first
= s
->exec_command
[id
];
2469 /* Figure out where we are in the list by walking back to the beginning */
2470 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2476 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2477 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2478 size_t allocated
= 0, length
= 0;
2479 Service
*s
= SERVICE(u
);
2480 const char *type
, *key
;
2481 ServiceExecCommand id
;
2491 if (command
== s
->control_command
) {
2493 id
= s
->control_command_id
;
2496 id
= SERVICE_EXEC_START
;
2499 idx
= service_exec_command_index(u
, id
, command
);
2501 STRV_FOREACH(arg
, command
->argv
) {
2502 _cleanup_free_
char *e
= NULL
;
2510 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1 + n
+ 1))
2514 args
[length
++] = ' ';
2516 memcpy(args
+ length
, e
, n
);
2520 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2525 p
= cescape(command
->path
);
2529 key
= strjoina(type
, "-command");
2530 return serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2533 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2534 Service
*s
= SERVICE(u
);
2542 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2543 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2544 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2546 if (s
->control_pid
> 0)
2547 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2549 if (s
->main_pid_known
&& s
->main_pid
> 0)
2550 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2552 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2553 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2554 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2556 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2557 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2559 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2563 service_serialize_exec_command(u
, f
, s
->control_command
);
2564 service_serialize_exec_command(u
, f
, s
->main_command
);
2566 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2569 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2572 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2576 if (s
->exec_fd_event_source
) {
2577 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2581 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2584 if (UNIT_ISSET(s
->accept_socket
)) {
2585 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2590 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2594 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2595 _cleanup_free_
char *c
= NULL
;
2598 copy
= fdset_put_dup(fds
, fs
->fd
);
2600 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2602 c
= cescape(fs
->fdname
);
2606 (void) serialize_item_format(f
, "fd-store-fd", "%i %s", copy
, c
);
2609 if (s
->main_exec_status
.pid
> 0) {
2610 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2611 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2612 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2614 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2615 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2616 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2620 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2621 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2623 if (s
->watchdog_override_enable
)
2624 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2626 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2627 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2632 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2633 Service
*s
= SERVICE(u
);
2635 unsigned idx
= 0, i
;
2636 bool control
, found
= false;
2637 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2638 ExecCommand
*command
= NULL
;
2639 _cleanup_free_
char *path
= NULL
;
2640 _cleanup_strv_free_
char **argv
= NULL
;
2642 enum ExecCommandState
{
2643 STATE_EXEC_COMMAND_TYPE
,
2644 STATE_EXEC_COMMAND_INDEX
,
2645 STATE_EXEC_COMMAND_PATH
,
2646 STATE_EXEC_COMMAND_ARGS
,
2647 _STATE_EXEC_COMMAND_MAX
,
2648 _STATE_EXEC_COMMAND_INVALID
= -1,
2655 control
= streq(key
, "control-command");
2657 state
= STATE_EXEC_COMMAND_TYPE
;
2660 _cleanup_free_
char *arg
= NULL
;
2662 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
);
2669 case STATE_EXEC_COMMAND_TYPE
:
2670 id
= service_exec_command_from_string(arg
);
2674 state
= STATE_EXEC_COMMAND_INDEX
;
2676 case STATE_EXEC_COMMAND_INDEX
:
2677 r
= safe_atou(arg
, &idx
);
2681 state
= STATE_EXEC_COMMAND_PATH
;
2683 case STATE_EXEC_COMMAND_PATH
:
2684 path
= TAKE_PTR(arg
);
2685 state
= STATE_EXEC_COMMAND_ARGS
;
2687 if (!path_is_absolute(path
))
2690 case STATE_EXEC_COMMAND_ARGS
:
2691 r
= strv_extend(&argv
, arg
);
2696 assert_not_reached("Unknown error at deserialization of exec command");
2701 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2704 /* Let's check whether exec command on given offset matches data that we just deserialized */
2705 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2709 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2714 /* Command at the index we serialized is different, let's look for command that exactly
2715 * matches but is on different index. If there is no such command we will not resume execution. */
2716 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2717 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2721 if (command
&& control
)
2722 s
->control_command
= command
;
2724 s
->main_command
= command
;
2726 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2731 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2732 Service
*s
= SERVICE(u
);
2740 if (streq(key
, "state")) {
2743 state
= service_state_from_string(value
);
2745 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2747 s
->deserialized_state
= state
;
2748 } else if (streq(key
, "result")) {
2751 f
= service_result_from_string(value
);
2753 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2754 else if (f
!= SERVICE_SUCCESS
)
2757 } else if (streq(key
, "reload-result")) {
2760 f
= service_result_from_string(value
);
2762 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2763 else if (f
!= SERVICE_SUCCESS
)
2764 s
->reload_result
= f
;
2766 } else if (streq(key
, "control-pid")) {
2769 if (parse_pid(value
, &pid
) < 0)
2770 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2772 s
->control_pid
= pid
;
2773 } else if (streq(key
, "main-pid")) {
2776 if (parse_pid(value
, &pid
) < 0)
2777 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2779 (void) service_set_main_pid(s
, pid
);
2780 } else if (streq(key
, "main-pid-known")) {
2783 b
= parse_boolean(value
);
2785 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2787 s
->main_pid_known
= b
;
2788 } else if (streq(key
, "bus-name-good")) {
2791 b
= parse_boolean(value
);
2793 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2795 s
->bus_name_good
= b
;
2796 } else if (streq(key
, "bus-name-owner")) {
2797 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2799 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2800 } else if (streq(key
, "status-text")) {
2803 r
= cunescape(value
, 0, &t
);
2805 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2807 free_and_replace(s
->status_text
, t
);
2809 } else if (streq(key
, "accept-socket")) {
2812 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2814 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2816 unit_ref_set(&s
->accept_socket
, u
, socket
);
2817 SOCKET(socket
)->n_connections
++;
2820 } else if (streq(key
, "socket-fd")) {
2823 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2824 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2826 asynchronous_close(s
->socket_fd
);
2827 s
->socket_fd
= fdset_remove(fds
, fd
);
2829 } else if (streq(key
, "fd-store-fd")) {
2834 pf
= strcspn(value
, WHITESPACE
);
2835 fdv
= strndupa(value
, pf
);
2837 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2838 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2840 _cleanup_free_
char *t
= NULL
;
2844 fdn
+= strspn(fdn
, WHITESPACE
);
2845 (void) cunescape(fdn
, 0, &t
);
2847 r
= service_add_fd_store(s
, fd
, t
);
2849 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2851 fdset_remove(fds
, fd
);
2854 } else if (streq(key
, "main-exec-status-pid")) {
2857 if (parse_pid(value
, &pid
) < 0)
2858 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2860 s
->main_exec_status
.pid
= pid
;
2861 } else if (streq(key
, "main-exec-status-code")) {
2864 if (safe_atoi(value
, &i
) < 0)
2865 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2867 s
->main_exec_status
.code
= i
;
2868 } else if (streq(key
, "main-exec-status-status")) {
2871 if (safe_atoi(value
, &i
) < 0)
2872 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2874 s
->main_exec_status
.status
= i
;
2875 } else if (streq(key
, "main-exec-status-start"))
2876 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2877 else if (streq(key
, "main-exec-status-exit"))
2878 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2879 else if (streq(key
, "watchdog-timestamp"))
2880 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2881 else if (streq(key
, "forbid-restart")) {
2884 b
= parse_boolean(value
);
2886 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2888 s
->forbid_restart
= b
;
2889 } else if (streq(key
, "stdin-fd")) {
2892 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2893 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2895 asynchronous_close(s
->stdin_fd
);
2896 s
->stdin_fd
= fdset_remove(fds
, fd
);
2897 s
->exec_context
.stdio_as_fds
= true;
2899 } else if (streq(key
, "stdout-fd")) {
2902 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2903 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
2905 asynchronous_close(s
->stdout_fd
);
2906 s
->stdout_fd
= fdset_remove(fds
, fd
);
2907 s
->exec_context
.stdio_as_fds
= true;
2909 } else if (streq(key
, "stderr-fd")) {
2912 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2913 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
2915 asynchronous_close(s
->stderr_fd
);
2916 s
->stderr_fd
= fdset_remove(fds
, fd
);
2917 s
->exec_context
.stdio_as_fds
= true;
2919 } else if (streq(key
, "exec-fd")) {
2922 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2923 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
2925 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
2927 fd
= fdset_remove(fds
, fd
);
2928 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
2931 } else if (streq(key
, "watchdog-override-usec")) {
2932 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
2933 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
2935 s
->watchdog_override_enable
= true;
2937 } else if (streq(key
, "watchdog-original-usec")) {
2938 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
2939 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
2941 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
2942 r
= service_deserialize_exec_command(u
, key
, value
);
2944 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
2946 } else if (streq(key
, "n-restarts")) {
2947 r
= safe_atou(value
, &s
->n_restarts
);
2949 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
2951 } else if (streq(key
, "flush-n-restarts")) {
2952 r
= parse_boolean(value
);
2954 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
2956 s
->flush_n_restarts
= r
;
2958 log_unit_debug(u
, "Unknown serialization key: %s", key
);
2963 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
2964 const UnitActiveState
*table
;
2968 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
2970 return table
[SERVICE(u
)->state
];
2973 static const char *service_sub_state_to_string(Unit
*u
) {
2976 return service_state_to_string(SERVICE(u
)->state
);
2979 static bool service_may_gc(Unit
*u
) {
2980 Service
*s
= SERVICE(u
);
2984 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2985 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2986 * have moved outside of the cgroup. */
2988 if (main_pid_good(s
) > 0 ||
2989 control_pid_good(s
) > 0)
2995 static int service_retry_pid_file(Service
*s
) {
2998 assert(s
->pid_file
);
2999 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3001 r
= service_load_pid_file(s
, false);
3005 service_unwatch_pid_file(s
);
3007 service_enter_running(s
, SERVICE_SUCCESS
);
3011 static int service_watch_pid_file(Service
*s
) {
3014 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3016 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3020 /* the pidfile might have appeared just before we set the watch */
3021 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3022 service_retry_pid_file(s
);
3026 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3027 service_unwatch_pid_file(s
);
3031 static int service_demand_pid_file(Service
*s
) {
3034 assert(s
->pid_file
);
3035 assert(!s
->pid_file_pathspec
);
3037 ps
= new0(PathSpec
, 1);
3042 ps
->path
= strdup(s
->pid_file
);
3048 path_simplify(ps
->path
, false);
3050 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3051 * keep their PID file open all the time. */
3052 ps
->type
= PATH_MODIFIED
;
3053 ps
->inotify_fd
= -1;
3055 s
->pid_file_pathspec
= ps
;
3057 return service_watch_pid_file(s
);
3060 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3061 PathSpec
*p
= userdata
;
3066 s
= SERVICE(p
->unit
);
3070 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3071 assert(s
->pid_file_pathspec
);
3072 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3074 log_unit_debug(UNIT(s
), "inotify event");
3076 if (path_spec_fd_event(p
, events
) < 0)
3079 if (service_retry_pid_file(s
) == 0)
3082 if (service_watch_pid_file(s
) < 0)
3088 service_unwatch_pid_file(s
);
3089 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3093 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3094 Service
*s
= SERVICE(userdata
);
3098 log_unit_debug(UNIT(s
), "got exec-fd event");
3100 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3101 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3102 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3103 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3104 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3105 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3106 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3107 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3113 n
= read(fd
, &x
, sizeof(x
));
3115 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3118 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3120 if (n
== 0) { /* EOF → the event we are waiting for */
3122 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3124 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3125 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3127 s
->exec_fd_hot
= false;
3129 /* Nice! This is what we have been waiting for. Transition to next state. */
3130 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3131 service_enter_start_post(s
);
3133 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3138 /* A byte was read → this turns on/off the exec fd logic */
3139 assert(n
== sizeof(x
));
3146 static void service_notify_cgroup_empty_event(Unit
*u
) {
3147 Service
*s
= SERVICE(u
);
3151 log_unit_debug(u
, "cgroup is empty");
3155 /* Waiting for SIGCHLD is usually more interesting,
3156 * because it includes return codes/signals. Which is
3157 * why we ignore the cgroup events for most cases,
3158 * except when we don't know pid which to expect the
3162 if (s
->type
== SERVICE_NOTIFY
&&
3163 main_pid_good(s
) == 0 &&
3164 control_pid_good(s
) == 0) {
3165 /* No chance of getting a ready notification anymore */
3166 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3171 case SERVICE_START_POST
:
3172 if (s
->pid_file_pathspec
&&
3173 main_pid_good(s
) == 0 &&
3174 control_pid_good(s
) == 0) {
3176 /* Give up hoping for the daemon to write its PID file */
3177 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3179 service_unwatch_pid_file(s
);
3180 if (s
->state
== SERVICE_START
)
3181 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3183 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3187 case SERVICE_RUNNING
:
3188 /* service_enter_running() will figure out what to do */
3189 service_enter_running(s
, SERVICE_SUCCESS
);
3192 case SERVICE_STOP_WATCHDOG
:
3193 case SERVICE_STOP_SIGTERM
:
3194 case SERVICE_STOP_SIGKILL
:
3196 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3197 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3201 case SERVICE_STOP_POST
:
3202 case SERVICE_FINAL_SIGTERM
:
3203 case SERVICE_FINAL_SIGKILL
:
3204 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3205 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3214 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3215 bool notify_dbus
= true;
3216 Service
*s
= SERVICE(u
);
3218 ExitClean clean_mode
;
3223 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3224 * considered daemons as they are typically not long running. */
3225 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3226 clean_mode
= EXIT_CLEAN_COMMAND
;
3228 clean_mode
= EXIT_CLEAN_DAEMON
;
3230 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3231 f
= SERVICE_SUCCESS
;
3232 else if (code
== CLD_EXITED
)
3233 f
= SERVICE_FAILURE_EXIT_CODE
;
3234 else if (code
== CLD_KILLED
)
3235 f
= SERVICE_FAILURE_SIGNAL
;
3236 else if (code
== CLD_DUMPED
)
3237 f
= SERVICE_FAILURE_CORE_DUMP
;
3239 assert_not_reached("Unknown code");
3241 if (s
->main_pid
== pid
) {
3242 /* Forking services may occasionally move to a new PID.
3243 * As long as they update the PID file before exiting the old
3244 * PID, they're fine. */
3245 if (service_load_pid_file(s
, false) > 0)
3249 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3251 if (s
->main_command
) {
3252 /* If this is not a forking service than the
3253 * main process got started and hence we copy
3254 * the exit status so that it is recorded both
3255 * as main and as control process exit
3258 s
->main_command
->exec_status
= s
->main_exec_status
;
3260 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3261 f
= SERVICE_SUCCESS
;
3262 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3264 /* If this is a forked process, then we should
3265 * ignore the return value if this was
3266 * configured for the starter process */
3268 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3269 f
= SERVICE_SUCCESS
;
3272 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3273 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3274 * that the service already logged the reason at a higher log level on its own. (Internally,
3275 * unit_log_process_exit() will possibly bump this to WARNING if the service died due to a signal.) */
3276 unit_log_process_exit(
3277 u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
,
3279 service_exec_command_to_string(SERVICE_EXEC_START
),
3282 if (s
->result
== SERVICE_SUCCESS
)
3285 if (s
->main_command
&&
3286 s
->main_command
->command_next
&&
3287 s
->type
== SERVICE_ONESHOT
&&
3288 f
== SERVICE_SUCCESS
) {
3290 /* There is another command to *
3291 * execute, so let's do that. */
3293 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3294 service_run_next_main(s
);
3298 /* The service exited, so the service is officially
3300 s
->main_command
= NULL
;
3304 case SERVICE_START_POST
:
3305 case SERVICE_RELOAD
:
3307 /* Need to wait until the operation is
3312 if (s
->type
== SERVICE_ONESHOT
) {
3313 /* This was our main goal, so let's go on */
3314 if (f
== SERVICE_SUCCESS
)
3315 service_enter_start_post(s
);
3317 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3319 } else if (s
->type
== SERVICE_NOTIFY
) {
3320 /* Only enter running through a notification, so that the
3321 * SERVICE_START state signifies that no ready notification
3322 * has been received */
3323 if (f
!= SERVICE_SUCCESS
)
3324 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3325 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3326 /* The service has never been and will never be active */
3327 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3332 case SERVICE_RUNNING
:
3333 service_enter_running(s
, f
);
3336 case SERVICE_STOP_WATCHDOG
:
3337 case SERVICE_STOP_SIGTERM
:
3338 case SERVICE_STOP_SIGKILL
:
3340 if (control_pid_good(s
) <= 0)
3341 service_enter_stop_post(s
, f
);
3343 /* If there is still a control process, wait for that first */
3346 case SERVICE_STOP_POST
:
3347 case SERVICE_FINAL_SIGTERM
:
3348 case SERVICE_FINAL_SIGKILL
:
3350 if (control_pid_good(s
) <= 0)
3351 service_enter_dead(s
, f
, true);
3355 assert_not_reached("Uh, main process died at wrong time.");
3359 } else if (s
->control_pid
== pid
) {
3362 if (s
->control_command
) {
3363 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3365 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3366 f
= SERVICE_SUCCESS
;
3369 unit_log_process_exit(
3370 u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
,
3372 service_exec_command_to_string(s
->control_command_id
),
3375 if (s
->result
== SERVICE_SUCCESS
)
3378 if (s
->control_command
&&
3379 s
->control_command
->command_next
&&
3380 f
== SERVICE_SUCCESS
) {
3382 /* There is another command to *
3383 * execute, so let's do that. */
3385 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3386 service_run_next_control(s
);
3389 /* No further commands for this step, so let's
3390 * figure out what to do next */
3392 s
->control_command
= NULL
;
3393 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3395 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3399 case SERVICE_START_PRE
:
3400 if (f
== SERVICE_SUCCESS
)
3401 service_enter_start(s
);
3403 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3407 if (s
->type
!= SERVICE_FORKING
)
3408 /* Maybe spurious event due to a reload that changed the type? */
3411 if (f
!= SERVICE_SUCCESS
) {
3412 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3417 bool has_start_post
;
3420 /* Let's try to load the pid file here if we can.
3421 * The PID file might actually be created by a START_POST
3422 * script. In that case don't worry if the loading fails. */
3424 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3425 r
= service_load_pid_file(s
, !has_start_post
);
3426 if (!has_start_post
&& r
< 0) {
3427 r
= service_demand_pid_file(s
);
3428 if (r
< 0 || cgroup_good(s
) == 0)
3429 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3433 service_search_main_pid(s
);
3435 service_enter_start_post(s
);
3438 case SERVICE_START_POST
:
3439 if (f
!= SERVICE_SUCCESS
) {
3440 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3447 r
= service_load_pid_file(s
, true);
3449 r
= service_demand_pid_file(s
);
3450 if (r
< 0 || cgroup_good(s
) == 0)
3451 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3455 service_search_main_pid(s
);
3457 service_enter_running(s
, SERVICE_SUCCESS
);
3460 case SERVICE_RELOAD
:
3461 if (f
== SERVICE_SUCCESS
)
3462 if (service_load_pid_file(s
, true) < 0)
3463 service_search_main_pid(s
);
3465 s
->reload_result
= f
;
3466 service_enter_running(s
, SERVICE_SUCCESS
);
3470 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3473 case SERVICE_STOP_WATCHDOG
:
3474 case SERVICE_STOP_SIGTERM
:
3475 case SERVICE_STOP_SIGKILL
:
3476 if (main_pid_good(s
) <= 0)
3477 service_enter_stop_post(s
, f
);
3479 /* If there is still a service process around, wait until
3480 * that one quit, too */
3483 case SERVICE_STOP_POST
:
3484 case SERVICE_FINAL_SIGTERM
:
3485 case SERVICE_FINAL_SIGKILL
:
3486 if (main_pid_good(s
) <= 0)
3487 service_enter_dead(s
, f
, true);
3491 assert_not_reached("Uh, control process died at wrong time.");
3494 } else /* Neither control nor main PID? If so, don't notify about anything */
3495 notify_dbus
= false;
3497 /* Notify clients about changed exit status */
3499 unit_add_to_dbus_queue(u
);
3501 /* We watch the main/control process otherwise we can't retrieve the unit they
3502 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3503 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3504 * detect when the cgroup becomes empty. Note that the control process is always
3505 * our child so it's pointless to watch all other processes. */
3506 if (!control_pid_good(s
))
3507 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3508 (void) unit_enqueue_rewatch_pids(u
);
3511 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3512 Service
*s
= SERVICE(userdata
);
3515 assert(source
== s
->timer_event_source
);
3519 case SERVICE_START_PRE
:
3521 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", s
->state
== SERVICE_START
? "Start" : "Start-pre");
3522 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3525 case SERVICE_START_POST
:
3526 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3527 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3530 case SERVICE_RUNNING
:
3531 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3532 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3535 case SERVICE_RELOAD
:
3536 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3537 service_kill_control_process(s
);
3538 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3539 service_enter_running(s
, SERVICE_SUCCESS
);
3543 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3544 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3547 case SERVICE_STOP_WATCHDOG
:
3548 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3549 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3552 case SERVICE_STOP_SIGTERM
:
3553 if (s
->kill_context
.send_sigkill
) {
3554 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3555 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3557 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3558 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3563 case SERVICE_STOP_SIGKILL
:
3564 /* Uh, we sent a SIGKILL and it is still not gone?
3565 * Must be something we cannot kill, so let's just be
3566 * weirded out and continue */
3568 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3569 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3572 case SERVICE_STOP_POST
:
3573 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3574 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3577 case SERVICE_FINAL_SIGTERM
:
3578 if (s
->kill_context
.send_sigkill
) {
3579 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3580 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3582 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3583 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3588 case SERVICE_FINAL_SIGKILL
:
3589 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3590 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3593 case SERVICE_AUTO_RESTART
:
3594 if (s
->restart_usec
> 0) {
3595 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3596 log_unit_info(UNIT(s
),
3597 "Service RestartSec=%s expired, scheduling restart.",
3598 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3600 log_unit_info(UNIT(s
),
3601 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3603 service_enter_restart(s
);
3607 assert_not_reached("Timeout at wrong time.");
3613 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3614 Service
*s
= SERVICE(userdata
);
3615 char t
[FORMAT_TIMESPAN_MAX
];
3616 usec_t watchdog_usec
;
3619 assert(source
== s
->watchdog_event_source
);
3621 watchdog_usec
= service_get_watchdog_usec(s
);
3623 if (UNIT(s
)->manager
->service_watchdogs
) {
3624 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3625 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3627 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3629 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3630 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3635 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3638 if (s
->notify_access
== NOTIFY_NONE
) {
3639 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3643 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3644 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
);
3647 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
);
3652 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3653 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3654 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
,
3655 pid
, s
->main_pid
, s
->control_pid
);
3656 else if (s
->main_pid
!= 0)
3657 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
);
3658 else if (s
->control_pid
!= 0)
3659 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
);
3661 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
);
3669 static void service_notify_message(
3671 const struct ucred
*ucred
,
3675 Service
*s
= SERVICE(u
);
3676 bool notify_dbus
= false;
3684 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3687 if (DEBUG_LOGGING
) {
3688 _cleanup_free_
char *cc
= NULL
;
3690 cc
= strv_join(tags
, ", ");
3691 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3694 /* Interpret MAINPID= */
3695 e
= strv_find_startswith(tags
, "MAINPID=");
3696 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3699 if (parse_pid(e
, &new_main_pid
) < 0)
3700 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3701 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3703 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3705 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3707 if (ucred
->uid
== 0) {
3708 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
);
3711 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3714 service_set_main_pid(s
, new_main_pid
);
3716 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
3718 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3725 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3726 STRV_FOREACH_BACKWARDS(i
, tags
) {
3728 if (streq(*i
, "READY=1")) {
3729 s
->notify_state
= NOTIFY_READY
;
3731 /* Type=notify services inform us about completed
3732 * initialization with READY=1 */
3733 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3734 service_enter_start_post(s
);
3736 /* Sending READY=1 while we are reloading informs us
3737 * that the reloading is complete */
3738 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3739 service_enter_running(s
, SERVICE_SUCCESS
);
3744 } else if (streq(*i
, "RELOADING=1")) {
3745 s
->notify_state
= NOTIFY_RELOADING
;
3747 if (s
->state
== SERVICE_RUNNING
)
3748 service_enter_reload_by_notify(s
);
3753 } else if (streq(*i
, "STOPPING=1")) {
3754 s
->notify_state
= NOTIFY_STOPPING
;
3756 if (s
->state
== SERVICE_RUNNING
)
3757 service_enter_stop_by_notify(s
);
3764 /* Interpret STATUS= */
3765 e
= strv_find_startswith(tags
, "STATUS=");
3767 _cleanup_free_
char *t
= NULL
;
3770 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
3771 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
3772 if (strlen(e
) > STATUS_TEXT_MAX
)
3773 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
3774 else if (!utf8_is_valid(e
))
3775 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
3783 if (!streq_ptr(s
->status_text
, t
)) {
3784 free_and_replace(s
->status_text
, t
);
3789 /* Interpret ERRNO= */
3790 e
= strv_find_startswith(tags
, "ERRNO=");
3794 status_errno
= parse_errno(e
);
3795 if (status_errno
< 0)
3796 log_unit_warning_errno(u
, status_errno
,
3797 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
3798 else if (s
->status_errno
!= status_errno
) {
3799 s
->status_errno
= status_errno
;
3804 /* Interpret EXTEND_TIMEOUT= */
3805 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3807 usec_t extend_timeout_usec
;
3808 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3809 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3811 service_extend_timeout(s
, extend_timeout_usec
);
3814 /* Interpret WATCHDOG= */
3815 if (strv_find(tags
, "WATCHDOG=1"))
3816 service_reset_watchdog(s
);
3818 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
3820 usec_t watchdog_override_usec
;
3821 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
3822 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
3824 service_override_watchdog_timeout(s
, watchdog_override_usec
);
3827 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3828 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3829 * fds, but optional when pushing in new fds, for compatibility reasons. */
3830 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
3833 name
= strv_find_startswith(tags
, "FDNAME=");
3834 if (!name
|| !fdname_is_valid(name
))
3835 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3837 service_remove_fd_store(s
, name
);
3839 } else if (strv_find(tags
, "FDSTORE=1")) {
3842 name
= strv_find_startswith(tags
, "FDNAME=");
3843 if (name
&& !fdname_is_valid(name
)) {
3844 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
3848 (void) service_add_fd_store_set(s
, fds
, name
);
3851 /* Notify clients about changed status or main pid */
3853 unit_add_to_dbus_queue(u
);
3856 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
3857 Service
*s
= SERVICE(u
);
3861 if (!s
->timer_event_source
)
3864 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3867 if (t
== USEC_INFINITY
)
3874 static void service_bus_name_owner_change(
3877 const char *old_owner
,
3878 const char *new_owner
) {
3880 Service
*s
= SERVICE(u
);
3886 assert(streq(s
->bus_name
, name
));
3887 assert(old_owner
|| new_owner
);
3889 if (old_owner
&& new_owner
)
3890 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", name
, old_owner
, new_owner
);
3892 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", name
, old_owner
);
3894 log_unit_debug(u
, "D-Bus name %s now registered by %s", name
, new_owner
);
3896 s
->bus_name_good
= !!new_owner
;
3898 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3899 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
3901 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
3905 if (s
->type
== SERVICE_DBUS
) {
3907 /* service_enter_running() will figure out what to
3909 if (s
->state
== SERVICE_RUNNING
)
3910 service_enter_running(s
, SERVICE_SUCCESS
);
3911 else if (s
->state
== SERVICE_START
&& new_owner
)
3912 service_enter_start_post(s
);
3914 } else if (new_owner
&&
3922 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
3925 /* Try to acquire PID from bus service */
3927 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, name
, SD_BUS_CREDS_PID
, &creds
);
3929 r
= sd_bus_creds_get_pid(creds
, &pid
);
3931 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, name
, pid
);
3933 service_set_main_pid(s
, pid
);
3934 unit_watch_pid(UNIT(s
), pid
, false);
3939 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
3940 _cleanup_free_
char *peer
= NULL
;
3946 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3947 * to be configured. We take ownership of the passed fd on success. */
3949 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
3952 if (s
->socket_fd
>= 0)
3955 if (s
->state
!= SERVICE_DEAD
)
3958 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
3960 if (UNIT(s
)->description
) {
3961 _cleanup_free_
char *a
;
3963 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
3967 r
= unit_set_description(UNIT(s
), a
);
3969 r
= unit_set_description(UNIT(s
), peer
);
3975 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
3980 s
->socket_fd_selinux_context_net
= selinux_context_net
;
3982 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
3986 static void service_reset_failed(Unit
*u
) {
3987 Service
*s
= SERVICE(u
);
3991 if (s
->state
== SERVICE_FAILED
)
3992 service_set_state(s
, SERVICE_DEAD
);
3994 s
->result
= SERVICE_SUCCESS
;
3995 s
->reload_result
= SERVICE_SUCCESS
;
3997 s
->flush_n_restarts
= false;
4000 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4001 Service
*s
= SERVICE(u
);
4005 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4008 static int service_main_pid(Unit
*u
) {
4009 Service
*s
= SERVICE(u
);
4016 static int service_control_pid(Unit
*u
) {
4017 Service
*s
= SERVICE(u
);
4021 return s
->control_pid
;
4024 static bool service_needs_console(Unit
*u
) {
4025 Service
*s
= SERVICE(u
);
4029 /* We provide our own implementation of this here, instead of relying of the generic implementation
4030 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4032 if (!exec_context_may_touch_console(&s
->exec_context
))
4035 return IN_SET(s
->state
,
4042 SERVICE_STOP_WATCHDOG
,
4043 SERVICE_STOP_SIGTERM
,
4044 SERVICE_STOP_SIGKILL
,
4046 SERVICE_FINAL_SIGTERM
,
4047 SERVICE_FINAL_SIGKILL
);
4050 static int service_exit_status(Unit
*u
) {
4051 Service
*s
= SERVICE(u
);
4055 if (s
->main_exec_status
.pid
<= 0 ||
4056 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4059 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4062 return s
->main_exec_status
.status
;
4065 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4066 [SERVICE_RESTART_NO
] = "no",
4067 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4068 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4069 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4070 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4071 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4072 [SERVICE_RESTART_ALWAYS
] = "always",
4075 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4077 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4078 [SERVICE_SIMPLE
] = "simple",
4079 [SERVICE_FORKING
] = "forking",
4080 [SERVICE_ONESHOT
] = "oneshot",
4081 [SERVICE_DBUS
] = "dbus",
4082 [SERVICE_NOTIFY
] = "notify",
4083 [SERVICE_IDLE
] = "idle",
4084 [SERVICE_EXEC
] = "exec",
4087 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4089 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4090 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4091 [SERVICE_EXEC_START
] = "ExecStart",
4092 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4093 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4094 [SERVICE_EXEC_STOP
] = "ExecStop",
4095 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4098 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4100 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4101 [NOTIFY_UNKNOWN
] = "unknown",
4102 [NOTIFY_READY
] = "ready",
4103 [NOTIFY_RELOADING
] = "reloading",
4104 [NOTIFY_STOPPING
] = "stopping",
4107 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4109 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4110 [SERVICE_SUCCESS
] = "success",
4111 [SERVICE_FAILURE_RESOURCES
] = "resources",
4112 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4113 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4114 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4115 [SERVICE_FAILURE_SIGNAL
] = "signal",
4116 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4117 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4118 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4121 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4123 const UnitVTable service_vtable
= {
4124 .object_size
= sizeof(Service
),
4125 .exec_context_offset
= offsetof(Service
, exec_context
),
4126 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4127 .kill_context_offset
= offsetof(Service
, kill_context
),
4128 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4129 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4135 .private_section
= "Service",
4137 .can_transient
= true,
4138 .can_delegate
= true,
4140 .init
= service_init
,
4141 .done
= service_done
,
4142 .load
= service_load
,
4143 .release_resources
= service_release_resources
,
4145 .coldplug
= service_coldplug
,
4147 .dump
= service_dump
,
4149 .start
= service_start
,
4150 .stop
= service_stop
,
4151 .reload
= service_reload
,
4153 .can_reload
= service_can_reload
,
4155 .kill
= service_kill
,
4157 .serialize
= service_serialize
,
4158 .deserialize_item
= service_deserialize_item
,
4160 .active_state
= service_active_state
,
4161 .sub_state_to_string
= service_sub_state_to_string
,
4163 .will_restart
= service_will_restart
,
4165 .may_gc
= service_may_gc
,
4167 .sigchld_event
= service_sigchld_event
,
4169 .reset_failed
= service_reset_failed
,
4171 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4172 .notify_message
= service_notify_message
,
4174 .main_pid
= service_main_pid
,
4175 .control_pid
= service_control_pid
,
4177 .bus_name_owner_change
= service_bus_name_owner_change
,
4179 .bus_vtable
= bus_service_vtable
,
4180 .bus_set_property
= bus_service_set_property
,
4181 .bus_commit_properties
= bus_service_commit_properties
,
4183 .get_timeout
= service_get_timeout
,
4184 .needs_console
= service_needs_console
,
4185 .exit_status
= service_exit_status
,
4187 .status_message_formats
= {
4188 .starting_stopping
= {
4189 [0] = "Starting %s...",
4190 [1] = "Stopping %s...",
4192 .finished_start_job
= {
4193 [JOB_DONE
] = "Started %s.",
4194 [JOB_FAILED
] = "Failed to start %s.",
4196 .finished_stop_job
= {
4197 [JOB_DONE
] = "Stopped %s.",
4198 [JOB_FAILED
] = "Stopped (with error) %s.",