1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
12 #include "sd-messages.h"
14 #include "alloc-util.h"
16 #include "bus-error.h"
17 #include "bus-kernel.h"
19 #include "dbus-service.h"
23 #include "exit-status.h"
26 #include "format-util.h"
28 #include "load-dropin.h"
29 #include "load-fragment.h"
32 #include "parse-util.h"
33 #include "path-util.h"
34 #include "process-util.h"
36 #include "signal-util.h"
38 #include "stdio-util.h"
39 #include "string-table.h"
40 #include "string-util.h"
42 #include "unit-name.h"
47 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
48 [SERVICE_DEAD
] = UNIT_INACTIVE
,
49 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
50 [SERVICE_START
] = UNIT_ACTIVATING
,
51 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
52 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
53 [SERVICE_EXITED
] = UNIT_ACTIVE
,
54 [SERVICE_RELOAD
] = UNIT_RELOADING
,
55 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_SIGABRT
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
59 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
60 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
61 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
62 [SERVICE_FAILED
] = UNIT_FAILED
,
63 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
66 /* For Type=idle we never want to delay any other jobs, hence we
67 * consider idle jobs active as soon as we start working on them */
68 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
69 [SERVICE_DEAD
] = UNIT_INACTIVE
,
70 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
71 [SERVICE_START
] = UNIT_ACTIVE
,
72 [SERVICE_START_POST
] = UNIT_ACTIVE
,
73 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
74 [SERVICE_EXITED
] = UNIT_ACTIVE
,
75 [SERVICE_RELOAD
] = UNIT_RELOADING
,
76 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
77 [SERVICE_STOP_SIGABRT
] = UNIT_DEACTIVATING
,
78 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
79 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
80 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
81 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
82 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
83 [SERVICE_FAILED
] = UNIT_FAILED
,
84 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
87 static int service_dispatch_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
88 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
89 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, 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
;
115 static void service_unwatch_control_pid(Service
*s
) {
118 if (s
->control_pid
<= 0)
121 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
125 static void service_unwatch_main_pid(Service
*s
) {
128 if (s
->main_pid
<= 0)
131 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
135 static void service_unwatch_pid_file(Service
*s
) {
136 if (!s
->pid_file_pathspec
)
139 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
140 path_spec_unwatch(s
->pid_file_pathspec
);
141 path_spec_done(s
->pid_file_pathspec
);
142 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
145 static int service_set_main_pid(Service
*s
, pid_t pid
) {
153 if (pid
== getpid_cached())
156 if (s
->main_pid
== pid
&& s
->main_pid_known
)
159 if (s
->main_pid
!= pid
) {
160 service_unwatch_main_pid(s
);
161 exec_status_start(&s
->main_exec_status
, pid
);
165 s
->main_pid_known
= true;
167 if (get_process_ppid(pid
, &ppid
) >= 0 && ppid
!= getpid_cached()) {
168 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
169 s
->main_pid_alien
= true;
171 s
->main_pid_alien
= false;
176 void service_close_socket_fd(Service
*s
) {
179 /* Undo the effect of service_set_socket_fd(). */
181 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
183 if (UNIT_ISSET(s
->accept_socket
)) {
184 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
185 unit_ref_unset(&s
->accept_socket
);
189 static void service_stop_watchdog(Service
*s
) {
192 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
193 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
196 static usec_t
service_get_watchdog_usec(Service
*s
) {
199 if (s
->watchdog_override_enable
)
200 return s
->watchdog_override_usec
;
202 return s
->watchdog_usec
;
205 static void service_start_watchdog(Service
*s
) {
207 usec_t watchdog_usec
;
211 watchdog_usec
= service_get_watchdog_usec(s
);
212 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
))
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
);
243 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
246 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
249 if (s
->timer_event_source
) {
250 uint64_t current
= 0, extended
= 0;
253 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
256 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
258 r
= sd_event_source_get_time(s
->timer_event_source
, ¤t
);
260 log_unit_error_errno(UNIT(s
), r
, "Failed to retrieve timeout timer: %m");
261 else if (extended
> current
) {
262 r
= sd_event_source_set_time(s
->timer_event_source
, extended
);
264 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout timer: %m");
267 if (s
->watchdog_event_source
) {
268 /* extend watchdog if necessary. We've asked for an extended timeout so we
269 * shouldn't expect a watchdog timeout in the interval in between */
270 r
= sd_event_source_get_time(s
->watchdog_event_source
, ¤t
);
272 log_unit_error_errno(UNIT(s
), r
, "Failed to retrieve watchdog timer: %m");
276 if (extended
> current
) {
277 r
= sd_event_source_set_time(s
->watchdog_event_source
, extended
);
279 log_unit_warning_errno(UNIT(s
), r
, "Failed to set watchdog timer: %m");
285 static void service_reset_watchdog(Service
*s
) {
288 dual_timestamp_get(&s
->watchdog_timestamp
);
289 service_start_watchdog(s
);
292 static void service_reset_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
295 s
->watchdog_override_enable
= true;
296 s
->watchdog_override_usec
= watchdog_override_usec
;
297 service_reset_watchdog(s
);
299 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
300 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
303 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
309 assert(fs
->service
->n_fd_store
> 0);
310 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
311 fs
->service
->n_fd_store
--;
314 if (fs
->event_source
) {
315 sd_event_source_set_enabled(fs
->event_source
, SD_EVENT_OFF
);
316 sd_event_source_unref(fs
->event_source
);
324 static void service_release_fd_store(Service
*s
) {
327 if (s
->n_keep_fd_store
> 0)
330 log_unit_debug(UNIT(s
), "Releasing all stored fds");
332 service_fd_store_unlink(s
->fd_store
);
334 assert(s
->n_fd_store
== 0);
337 static void service_release_resources(Unit
*u
) {
338 Service
*s
= SERVICE(u
);
342 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
345 log_unit_debug(u
, "Releasing resources.");
347 s
->stdin_fd
= safe_close(s
->stdin_fd
);
348 s
->stdout_fd
= safe_close(s
->stdout_fd
);
349 s
->stderr_fd
= safe_close(s
->stderr_fd
);
351 service_release_fd_store(s
);
354 static void service_done(Unit
*u
) {
355 Service
*s
= SERVICE(u
);
359 s
->pid_file
= mfree(s
->pid_file
);
360 s
->status_text
= mfree(s
->status_text
);
362 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
363 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
364 s
->control_command
= NULL
;
365 s
->main_command
= NULL
;
367 dynamic_creds_unref(&s
->dynamic_creds
);
369 exit_status_set_free(&s
->restart_prevent_status
);
370 exit_status_set_free(&s
->restart_force_status
);
371 exit_status_set_free(&s
->success_status
);
373 /* This will leak a process, but at least no memory or any of
375 service_unwatch_main_pid(s
);
376 service_unwatch_control_pid(s
);
377 service_unwatch_pid_file(s
);
380 unit_unwatch_bus_name(u
, s
->bus_name
);
381 s
->bus_name
= mfree(s
->bus_name
);
384 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
386 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
387 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
389 service_close_socket_fd(s
);
390 s
->peer
= socket_peer_unref(s
->peer
);
392 unit_ref_unset(&s
->accept_socket
);
394 service_stop_watchdog(s
);
396 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
398 service_release_resources(u
);
401 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
402 ServiceFDStore
*fs
= userdata
;
407 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
408 log_unit_debug(UNIT(fs
->service
),
409 "Received %s on stored fd %d (%s), closing.",
410 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
411 fs
->fd
, strna(fs
->fdname
));
412 service_fd_store_unlink(fs
);
416 static int service_add_fd_store(Service
*s
, int fd
, const char *name
) {
420 /* fd is always consumed if we return >= 0 */
425 if (s
->n_fd_store
>= s
->n_fd_store_max
)
426 return -EXFULL
; /* Our store is full.
427 * Use this errno rather than E[NM]FILE to distinguish from
428 * the case where systemd itself hits the file limit. */
430 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
431 r
= same_fd(fs
->fd
, fd
);
436 return 0; /* fd already included */
440 fs
= new0(ServiceFDStore
, 1);
446 fs
->fdname
= strdup(name
?: "stored");
452 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
453 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
458 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
460 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
463 return 1; /* fd newly stored */
466 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
) {
471 while (fdset_size(fds
) > 0) {
472 _cleanup_close_
int fd
= -1;
474 fd
= fdset_steal_first(fds
);
478 r
= service_add_fd_store(s
, fd
, name
);
480 return log_unit_warning_errno(UNIT(s
), r
,
481 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
484 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
486 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
493 static void service_remove_fd_store(Service
*s
, const char *name
) {
494 ServiceFDStore
*fs
, *n
;
499 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
500 if (!streq(fs
->fdname
, name
))
503 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
504 service_fd_store_unlink(fs
);
508 static int service_arm_timer(Service
*s
, usec_t usec
) {
513 if (s
->timer_event_source
) {
514 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
518 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
521 if (usec
== USEC_INFINITY
)
524 r
= sd_event_add_time(
525 UNIT(s
)->manager
->event
,
526 &s
->timer_event_source
,
529 service_dispatch_timer
, s
);
533 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
538 static int service_verify(Service
*s
) {
541 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
544 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]) {
545 log_unit_error(UNIT(s
), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
549 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
550 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
554 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
555 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
559 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
560 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
564 if (s
->type
== SERVICE_ONESHOT
&& s
->restart
!= SERVICE_RESTART_NO
) {
565 log_unit_error(UNIT(s
), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
569 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
570 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
574 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
575 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
579 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
580 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
582 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
583 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
587 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
588 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
590 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
591 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
593 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
594 log_unit_warning(UNIT(s
), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
599 static int service_add_default_dependencies(Service
*s
) {
604 if (!UNIT(s
)->default_dependencies
)
607 /* Add a number of automatic dependencies useful for the
608 * majority of services. */
610 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
611 /* First, pull in the really early boot stuff, and
612 * require it, so that we fail if we can't acquire
615 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, NULL
, true, UNIT_DEPENDENCY_DEFAULT
);
620 /* In the --user instance there's no sysinit.target,
621 * in that case require basic.target instead. */
623 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, NULL
, true, UNIT_DEPENDENCY_DEFAULT
);
628 /* Second, if the rest of the base system is in the same
629 * transaction, order us after it, but do not pull it in or
630 * even require it. */
631 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, NULL
, true, UNIT_DEPENDENCY_DEFAULT
);
635 /* Third, add us in for normal shutdown. */
636 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, NULL
, true, UNIT_DEPENDENCY_DEFAULT
);
639 static void service_fix_output(Service
*s
) {
642 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
643 * however, since in that case we want output to default to the same place as we read input from. */
645 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
646 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
647 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
648 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
650 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
651 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
652 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
654 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
655 s
->exec_context
.stdin_data_size
> 0)
656 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
659 static int service_setup_bus_name(Service
*s
) {
667 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, NULL
, true, UNIT_DEPENDENCY_FILE
);
669 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
671 /* We always want to be ordered against dbus.socket if both are in the transaction. */
672 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, NULL
, true, UNIT_DEPENDENCY_FILE
);
674 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
676 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
678 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
680 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
685 static int service_add_extras(Service
*s
) {
690 if (s
->type
== _SERVICE_TYPE_INVALID
) {
691 /* Figure out a type automatically */
693 s
->type
= SERVICE_DBUS
;
694 else if (s
->exec_command
[SERVICE_EXEC_START
])
695 s
->type
= SERVICE_SIMPLE
;
697 s
->type
= SERVICE_ONESHOT
;
700 /* Oneshot services have disabled start timeout by default */
701 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
702 s
->timeout_start_usec
= USEC_INFINITY
;
704 service_fix_output(s
);
706 r
= unit_patch_contexts(UNIT(s
));
710 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
714 r
= unit_set_default_slice(UNIT(s
));
718 /* If the service needs the notify socket, let's enable it automatically. */
719 if (s
->notify_access
== NOTIFY_NONE
&&
720 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
721 s
->notify_access
= NOTIFY_MAIN
;
723 r
= service_add_default_dependencies(s
);
727 r
= service_setup_bus_name(s
);
734 static int service_load(Unit
*u
) {
735 Service
*s
= SERVICE(u
);
740 /* Load a .service file */
741 r
= unit_load_fragment(u
);
745 /* Still nothing found? Then let's give up */
746 if (u
->load_state
== UNIT_STUB
)
749 /* This is a new unit? Then let's add in some extras */
750 if (u
->load_state
== UNIT_LOADED
) {
752 /* We were able to load something, then let's add in
753 * the dropin directories. */
754 r
= unit_load_dropin(u
);
758 /* This is a new unit? Then let's add in some
760 r
= service_add_extras(s
);
765 return service_verify(s
);
768 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
769 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
];
770 char buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
];
771 ServiceExecCommand c
;
772 Service
*s
= SERVICE(u
);
777 prefix
= strempty(prefix
);
778 prefix2
= strjoina(prefix
, "\t");
781 "%sService State: %s\n"
783 "%sReload Result: %s\n"
784 "%sPermissionsStartOnly: %s\n"
785 "%sRootDirectoryStartOnly: %s\n"
786 "%sRemainAfterExit: %s\n"
787 "%sGuessMainPID: %s\n"
790 "%sNotifyAccess: %s\n"
791 "%sNotifyState: %s\n",
792 prefix
, service_state_to_string(s
->state
),
793 prefix
, service_result_to_string(s
->result
),
794 prefix
, service_result_to_string(s
->reload_result
),
795 prefix
, yes_no(s
->permissions_start_only
),
796 prefix
, yes_no(s
->root_directory_start_only
),
797 prefix
, yes_no(s
->remain_after_exit
),
798 prefix
, yes_no(s
->guess_main_pid
),
799 prefix
, service_type_to_string(s
->type
),
800 prefix
, service_restart_to_string(s
->restart
),
801 prefix
, notify_access_to_string(s
->notify_access
),
802 prefix
, notify_state_to_string(s
->notify_state
));
804 if (s
->control_pid
> 0)
806 "%sControl PID: "PID_FMT
"\n",
807 prefix
, s
->control_pid
);
811 "%sMain PID: "PID_FMT
"\n"
812 "%sMain PID Known: %s\n"
813 "%sMain PID Alien: %s\n",
815 prefix
, yes_no(s
->main_pid_known
),
816 prefix
, yes_no(s
->main_pid_alien
));
821 prefix
, s
->pid_file
);
826 "%sBus Name Good: %s\n",
828 prefix
, yes_no(s
->bus_name_good
));
830 if (UNIT_ISSET(s
->accept_socket
))
832 "%sAccept Socket: %s\n",
833 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
837 "%sTimeoutStartSec: %s\n"
838 "%sTimeoutStopSec: %s\n"
839 "%sRuntimeMaxSec: %s\n"
840 "%sWatchdogSec: %s\n",
841 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
842 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
843 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
844 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
845 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
847 kill_context_dump(&s
->kill_context
, f
, prefix
);
848 exec_context_dump(&s
->exec_context
, f
, prefix
);
850 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
852 if (!s
->exec_command
[c
])
855 fprintf(f
, "%s-> %s:\n",
856 prefix
, service_exec_command_to_string(c
));
858 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
862 fprintf(f
, "%sStatus Text: %s\n",
863 prefix
, s
->status_text
);
865 if (s
->n_fd_store_max
> 0)
867 "%sFile Descriptor Store Max: %u\n"
868 "%sFile Descriptor Store Current: %zu\n",
869 prefix
, s
->n_fd_store_max
,
870 prefix
, s
->n_fd_store
);
872 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
875 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
879 assert(pid_is_valid(pid
));
881 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
882 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
885 if (pid
== getpid_cached() || pid
== 1) {
886 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
890 if (pid
== s
->control_pid
) {
891 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
895 if (!pid_is_alive(pid
)) {
896 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
900 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
901 if (owner
== UNIT(s
)) {
902 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
903 return 1; /* Yay, it's definitely a good PID */
906 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
909 static int service_load_pid_file(Service
*s
, bool may_warn
) {
910 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
911 bool questionable_pid_file
= false;
912 _cleanup_free_
char *k
= NULL
;
913 _cleanup_close_
int fd
= -1;
922 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
924 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
926 log_unit_full(UNIT(s
), LOG_DEBUG
, fd
, "Permission denied while opening PID file or potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
928 questionable_pid_file
= true;
930 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
933 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
));
935 /* 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. */
936 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
937 r
= read_one_line_file(procfs
, &k
);
939 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
);
941 r
= parse_pid(k
, &pid
);
943 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
945 if (s
->main_pid_known
&& pid
== s
->main_pid
)
948 r
= service_is_suitable_main_pid(s
, pid
, prio
);
954 if (questionable_pid_file
) {
955 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
959 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
961 if (fstat(fd
, &st
) < 0)
962 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
964 if (st
.st_uid
!= 0) {
965 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
);
969 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
);
972 if (s
->main_pid_known
) {
973 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
975 service_unwatch_main_pid(s
);
976 s
->main_pid_known
= false;
978 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
980 r
= service_set_main_pid(s
, pid
);
984 r
= unit_watch_pid(UNIT(s
), pid
);
985 if (r
< 0) /* FIXME: we need to do something here */
986 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
991 static void service_search_main_pid(Service
*s
) {
997 /* If we know it anyway, don't ever fallback to unreliable
999 if (s
->main_pid_known
)
1002 if (!s
->guess_main_pid
)
1005 assert(s
->main_pid
<= 0);
1007 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1010 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1011 if (service_set_main_pid(s
, pid
) < 0)
1014 r
= unit_watch_pid(UNIT(s
), pid
);
1016 /* FIXME: we need to do something here */
1017 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1020 static void service_set_state(Service
*s
, ServiceState state
) {
1021 ServiceState old_state
;
1022 const UnitActiveState
*table
;
1026 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1028 old_state
= s
->state
;
1031 service_unwatch_pid_file(s
);
1034 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1037 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1038 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1039 SERVICE_AUTO_RESTART
))
1040 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1043 SERVICE_START
, SERVICE_START_POST
,
1044 SERVICE_RUNNING
, SERVICE_RELOAD
,
1045 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1046 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1047 service_unwatch_main_pid(s
);
1048 s
->main_command
= NULL
;
1052 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1054 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1055 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1056 service_unwatch_control_pid(s
);
1057 s
->control_command
= NULL
;
1058 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1061 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1062 unit_unwatch_all_pids(UNIT(s
));
1063 unit_dequeue_rewatch_pids(UNIT(s
));
1067 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1068 SERVICE_RUNNING
, SERVICE_RELOAD
,
1069 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1070 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1071 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1072 service_close_socket_fd(s
);
1074 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1075 service_stop_watchdog(s
);
1077 /* For the inactive states unit_notify() will trim the cgroup,
1078 * but for exit we have to do that ourselves... */
1079 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1080 unit_prune_cgroup(UNIT(s
));
1082 if (old_state
!= state
)
1083 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1085 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1086 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1087 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1090 static usec_t
service_coldplug_timeout(Service
*s
) {
1093 switch (s
->deserialized_state
) {
1095 case SERVICE_START_PRE
:
1097 case SERVICE_START_POST
:
1098 case SERVICE_RELOAD
:
1099 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1101 case SERVICE_RUNNING
:
1102 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1105 case SERVICE_STOP_SIGABRT
:
1106 case SERVICE_STOP_SIGTERM
:
1107 case SERVICE_STOP_SIGKILL
:
1108 case SERVICE_STOP_POST
:
1109 case SERVICE_FINAL_SIGTERM
:
1110 case SERVICE_FINAL_SIGKILL
:
1111 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1113 case SERVICE_AUTO_RESTART
:
1114 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1117 return USEC_INFINITY
;
1121 static int service_coldplug(Unit
*u
) {
1122 Service
*s
= SERVICE(u
);
1126 assert(s
->state
== SERVICE_DEAD
);
1128 if (s
->deserialized_state
== s
->state
)
1131 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1135 if (s
->main_pid
> 0 &&
1136 pid_is_unwaited(s
->main_pid
) &&
1137 (IN_SET(s
->deserialized_state
,
1138 SERVICE_START
, SERVICE_START_POST
,
1139 SERVICE_RUNNING
, SERVICE_RELOAD
,
1140 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1141 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1142 r
= unit_watch_pid(UNIT(s
), s
->main_pid
);
1147 if (s
->control_pid
> 0 &&
1148 pid_is_unwaited(s
->control_pid
) &&
1149 IN_SET(s
->deserialized_state
,
1150 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1152 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1153 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1154 r
= unit_watch_pid(UNIT(s
), s
->control_pid
);
1159 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1160 (void) unit_enqueue_rewatch_pids(u
);
1161 (void) unit_setup_dynamic_creds(u
);
1162 (void) unit_setup_exec_runtime(u
);
1165 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1166 service_start_watchdog(s
);
1168 if (UNIT_ISSET(s
->accept_socket
)) {
1169 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1171 if (socket
->max_connections_per_source
> 0) {
1174 /* Make a best-effort attempt at bumping the connection count */
1175 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1176 socket_peer_unref(s
->peer
);
1182 service_set_state(s
, s
->deserialized_state
);
1186 static int service_collect_fds(Service
*s
,
1189 unsigned *n_storage_fds
,
1190 unsigned *n_socket_fds
) {
1192 _cleanup_strv_free_
char **rfd_names
= NULL
;
1193 _cleanup_free_
int *rfds
= NULL
;
1194 unsigned rn_socket_fds
= 0, rn_storage_fds
= 0;
1200 assert(n_socket_fds
);
1202 if (s
->socket_fd
>= 0) {
1204 /* Pass the per-connection socket */
1209 rfds
[0] = s
->socket_fd
;
1211 rfd_names
= strv_new("connection", NULL
);
1221 /* Pass all our configured sockets for singleton services */
1223 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1224 _cleanup_free_
int *cfds
= NULL
;
1228 if (u
->type
!= UNIT_SOCKET
)
1233 cn_fds
= socket_collect_fds(sock
, &cfds
);
1241 rfds
= TAKE_PTR(cfds
);
1242 rn_socket_fds
= cn_fds
;
1246 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1250 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1253 rn_socket_fds
+= cn_fds
;
1256 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1262 if (s
->n_fd_store
> 0) {
1268 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1274 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1279 n_fds
= rn_socket_fds
;
1281 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1282 rfds
[n_fds
] = fs
->fd
;
1283 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1284 if (!rfd_names
[n_fds
])
1291 rfd_names
[n_fds
] = NULL
;
1294 *fds
= TAKE_PTR(rfds
);
1295 *fd_names
= TAKE_PTR(rfd_names
);
1296 *n_socket_fds
= rn_socket_fds
;
1297 *n_storage_fds
= rn_storage_fds
;
1302 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1305 /* Notifications are accepted depending on the process and
1306 * the access setting of the service:
1307 * process: \ access: NONE MAIN EXEC ALL
1308 * main no yes yes yes
1309 * control no no yes yes
1310 * other (forked) no no no yes */
1312 if (flags
& EXEC_IS_CONTROL
)
1313 /* A control process */
1314 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1316 /* We only spawn main processes and control processes, so any
1317 * process that is not a control process is a main process */
1318 return s
->notify_access
!= NOTIFY_NONE
;
1321 static int service_spawn(
1328 ExecParameters exec_params
= {
1334 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1335 unsigned n_storage_fds
= 0, n_socket_fds
= 0, n_env
= 0;
1336 _cleanup_free_
int *fds
= NULL
;
1344 r
= unit_prepare_exec(UNIT(s
));
1348 if (flags
& EXEC_IS_CONTROL
) {
1349 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1350 if (s
->permissions_start_only
)
1351 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1352 if (s
->root_directory_start_only
)
1353 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1356 if ((flags
& EXEC_PASS_FDS
) ||
1357 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1358 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1359 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1361 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_storage_fds
, &n_socket_fds
);
1365 log_unit_debug(UNIT(s
), "Passing %i fds to service", n_storage_fds
+ n_socket_fds
);
1368 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1372 our_env
= new0(char*, 9);
1376 if (service_exec_needs_notify_socket(s
, flags
))
1377 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1380 if (s
->main_pid
> 0)
1381 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1384 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1385 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1388 if (s
->socket_fd
>= 0) {
1389 union sockaddr_union sa
;
1390 socklen_t salen
= sizeof(sa
);
1392 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1393 * useful. Note that we do this only when we are still connected at this point in time, which we might
1394 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1395 * in ENOTCONN), and just use whate we can use. */
1397 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1398 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1400 _cleanup_free_
char *addr
= NULL
;
1404 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1408 t
= strappend("REMOTE_ADDR=", addr
);
1411 our_env
[n_env
++] = t
;
1413 r
= sockaddr_port(&sa
.sa
, &port
);
1417 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1419 our_env
[n_env
++] = t
;
1423 if (flags
& EXEC_SETENV_RESULT
) {
1424 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1427 if (s
->main_exec_status
.pid
> 0 &&
1428 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1429 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1432 if (s
->main_exec_status
.code
== CLD_EXITED
)
1433 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1435 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1441 unit_set_exec_params(UNIT(s
), &exec_params
);
1443 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1447 /* System services should get a new keyring by default. */
1448 SET_FLAG(exec_params
.flags
, EXEC_NEW_KEYRING
, MANAGER_IS_SYSTEM(UNIT(s
)->manager
));
1450 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1451 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1452 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1454 exec_params
.argv
= c
->argv
;
1455 exec_params
.environment
= final_env
;
1456 exec_params
.fds
= fds
;
1457 exec_params
.fd_names
= fd_names
;
1458 exec_params
.n_storage_fds
= n_storage_fds
;
1459 exec_params
.n_socket_fds
= n_socket_fds
;
1460 exec_params
.watchdog_usec
= s
->watchdog_usec
;
1461 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1462 if (s
->type
== SERVICE_IDLE
)
1463 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1464 exec_params
.stdin_fd
= s
->stdin_fd
;
1465 exec_params
.stdout_fd
= s
->stdout_fd
;
1466 exec_params
.stderr_fd
= s
->stderr_fd
;
1468 r
= exec_spawn(UNIT(s
),
1478 r
= unit_watch_pid(UNIT(s
), pid
);
1479 if (r
< 0) /* FIXME: we need to do something here */
1487 static int main_pid_good(Service
*s
) {
1490 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1492 /* If we know the pid file, then let's just check if it is
1494 if (s
->main_pid_known
) {
1496 /* If it's an alien child let's check if it is still
1498 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1499 return pid_is_alive(s
->main_pid
);
1501 /* .. otherwise assume we'll get a SIGCHLD for it,
1502 * which we really should wait for to collect exit
1503 * status and code */
1504 return s
->main_pid
> 0;
1507 /* We don't know the pid */
1511 static int control_pid_good(Service
*s
) {
1514 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1515 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1516 * means: we can't figure it out. */
1518 return s
->control_pid
> 0;
1521 static int cgroup_good(Service
*s
) {
1526 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1529 if (!UNIT(s
)->cgroup_path
)
1532 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1539 static bool service_shall_restart(Service
*s
) {
1542 /* Don't restart after manual stops */
1543 if (s
->forbid_restart
)
1546 /* Never restart if this is configured as special exception */
1547 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1550 /* Restart if the exit code/status are configured as restart triggers */
1551 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1554 switch (s
->restart
) {
1556 case SERVICE_RESTART_NO
:
1559 case SERVICE_RESTART_ALWAYS
:
1562 case SERVICE_RESTART_ON_SUCCESS
:
1563 return s
->result
== SERVICE_SUCCESS
;
1565 case SERVICE_RESTART_ON_FAILURE
:
1566 return s
->result
!= SERVICE_SUCCESS
;
1568 case SERVICE_RESTART_ON_ABNORMAL
:
1569 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1571 case SERVICE_RESTART_ON_WATCHDOG
:
1572 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1574 case SERVICE_RESTART_ON_ABORT
:
1575 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1578 assert_not_reached("unknown restart setting");
1582 static bool service_will_restart(Unit
*u
) {
1583 Service
*s
= SERVICE(u
);
1587 if (s
->will_auto_restart
)
1589 if (s
->state
== SERVICE_AUTO_RESTART
)
1593 if (UNIT(s
)->job
->type
== JOB_START
)
1599 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1604 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1605 * undo what has already been enqueued. */
1606 if (unit_stop_pending(UNIT(s
)))
1607 allow_restart
= false;
1609 if (s
->result
== SERVICE_SUCCESS
)
1612 if (s
->result
!= SERVICE_SUCCESS
)
1613 log_unit_warning(UNIT(s
), "Failed with result '%s'.", service_result_to_string(s
->result
));
1615 if (allow_restart
&& service_shall_restart(s
))
1616 s
->will_auto_restart
= true;
1618 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1619 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1620 s
->n_keep_fd_store
++;
1622 service_set_state(s
, s
->result
!= SERVICE_SUCCESS
? SERVICE_FAILED
: SERVICE_DEAD
);
1624 if (s
->will_auto_restart
) {
1625 s
->will_auto_restart
= false;
1627 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1629 s
->n_keep_fd_store
--;
1633 service_set_state(s
, SERVICE_AUTO_RESTART
);
1635 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1636 * user can still introspect the counter. Do so on the next start. */
1637 s
->flush_n_restarts
= true;
1639 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1640 * queue, so that the fd store is possibly gc'ed again */
1641 s
->n_keep_fd_store
--;
1642 unit_add_to_gc_queue(UNIT(s
));
1644 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1645 s
->forbid_restart
= false;
1647 /* We want fresh tmpdirs in case service is started again immediately */
1648 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1650 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1651 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1652 /* Also, remove the runtime directory */
1653 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1655 /* Get rid of the IPC bits of the user */
1656 unit_unref_uid_gid(UNIT(s
), true);
1658 /* Release the user, and destroy it if we are the only remaining owner */
1659 dynamic_creds_destroy(&s
->dynamic_creds
);
1661 /* Try to delete the pid file. At this point it will be
1662 * out-of-date, and some software might be confused by it, so
1663 * let's remove it. */
1665 (void) unlink(s
->pid_file
);
1670 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1671 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1674 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1678 if (s
->result
== SERVICE_SUCCESS
)
1681 service_unwatch_control_pid(s
);
1683 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1685 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1686 if (s
->control_command
) {
1687 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1689 r
= service_spawn(s
,
1691 s
->timeout_stop_usec
,
1692 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
,
1697 service_set_state(s
, SERVICE_STOP_POST
);
1699 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1704 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1705 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1708 static int state_to_kill_operation(ServiceState state
) {
1711 case SERVICE_STOP_SIGABRT
:
1714 case SERVICE_STOP_SIGTERM
:
1715 case SERVICE_FINAL_SIGTERM
:
1716 return KILL_TERMINATE
;
1718 case SERVICE_STOP_SIGKILL
:
1719 case SERVICE_FINAL_SIGKILL
:
1723 return _KILL_OPERATION_INVALID
;
1727 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1732 if (s
->result
== SERVICE_SUCCESS
)
1735 /* Before sending any signal, make sure we track all members of this cgroup */
1736 (void) unit_watch_all_pids(UNIT(s
));
1738 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1740 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1742 r
= unit_kill_context(
1745 state_to_kill_operation(state
),
1753 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1757 service_set_state(s
, state
);
1758 } else if (IN_SET(state
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1759 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1760 else if (IN_SET(state
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1761 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1762 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1763 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1765 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1770 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1772 if (IN_SET(state
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1773 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1775 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1778 static void service_enter_stop_by_notify(Service
*s
) {
1781 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1783 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1785 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1786 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1789 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1794 if (s
->result
== SERVICE_SUCCESS
)
1797 service_unwatch_control_pid(s
);
1798 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1800 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1801 if (s
->control_command
) {
1802 s
->control_command_id
= SERVICE_EXEC_STOP
;
1804 r
= service_spawn(s
,
1806 s
->timeout_stop_usec
,
1807 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
,
1812 service_set_state(s
, SERVICE_STOP
);
1814 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1819 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1820 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1823 static bool service_good(Service
*s
) {
1827 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1830 main_pid_ok
= main_pid_good(s
);
1831 if (main_pid_ok
> 0) /* It's alive */
1833 if (main_pid_ok
== 0) /* It's dead */
1836 /* OK, we don't know anything about the main PID, maybe
1837 * because there is none. Let's check the control group
1840 return cgroup_good(s
) != 0;
1843 static void service_enter_running(Service
*s
, ServiceResult f
) {
1846 if (s
->result
== SERVICE_SUCCESS
)
1849 service_unwatch_control_pid(s
);
1851 if (s
->result
!= SERVICE_SUCCESS
)
1852 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1853 else if (service_good(s
)) {
1855 /* If there are any queued up sd_notify() notifications, process them now */
1856 if (s
->notify_state
== NOTIFY_RELOADING
)
1857 service_enter_reload_by_notify(s
);
1858 else if (s
->notify_state
== NOTIFY_STOPPING
)
1859 service_enter_stop_by_notify(s
);
1861 service_set_state(s
, SERVICE_RUNNING
);
1862 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
1865 } else if (s
->remain_after_exit
)
1866 service_set_state(s
, SERVICE_EXITED
);
1868 service_enter_stop(s
, SERVICE_SUCCESS
);
1871 static void service_enter_start_post(Service
*s
) {
1875 service_unwatch_control_pid(s
);
1876 service_reset_watchdog(s
);
1878 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
1879 if (s
->control_command
) {
1880 s
->control_command_id
= SERVICE_EXEC_START_POST
;
1882 r
= service_spawn(s
,
1884 s
->timeout_start_usec
,
1885 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
,
1890 service_set_state(s
, SERVICE_START_POST
);
1892 service_enter_running(s
, SERVICE_SUCCESS
);
1897 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
1898 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
1901 static void service_kill_control_process(Service
*s
) {
1906 if (s
->control_pid
<= 0)
1909 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
1911 _cleanup_free_
char *comm
= NULL
;
1913 (void) get_process_comm(s
->control_pid
, &comm
);
1915 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
1916 s
->control_pid
, strna(comm
));
1920 static void service_enter_start(Service
*s
) {
1928 service_unwatch_control_pid(s
);
1929 service_unwatch_main_pid(s
);
1931 unit_warn_leftover_processes(UNIT(s
));
1933 if (s
->type
== SERVICE_FORKING
) {
1934 s
->control_command_id
= SERVICE_EXEC_START
;
1935 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
1937 s
->main_command
= NULL
;
1939 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1940 s
->control_command
= NULL
;
1942 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
1946 if (s
->type
!= SERVICE_ONESHOT
) {
1947 /* There's no command line configured for the main command? Hmm, that is strange. This can only
1948 * happen if the configuration changes at runtime. In this case, let's enter a failure
1950 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start: %m");
1955 service_enter_start_post(s
);
1959 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
1960 /* For simple + idle this is the main process. We don't apply any timeout here, but
1961 * service_enter_running() will later apply the .runtime_max_usec timeout. */
1962 timeout
= USEC_INFINITY
;
1964 timeout
= s
->timeout_start_usec
;
1966 r
= service_spawn(s
,
1969 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
1974 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
1975 /* For simple services we immediately start
1976 * the START_POST binaries. */
1978 service_set_main_pid(s
, pid
);
1979 service_enter_start_post(s
);
1981 } else if (s
->type
== SERVICE_FORKING
) {
1983 /* For forking services we wait until the start
1984 * process exited. */
1986 s
->control_pid
= pid
;
1987 service_set_state(s
, SERVICE_START
);
1989 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
)) {
1991 /* For oneshot services we wait until the start
1992 * process exited, too, but it is our main process. */
1994 /* For D-Bus services we know the main pid right away,
1995 * but wait for the bus name to appear on the
1996 * bus. Notify services are similar. */
1998 service_set_main_pid(s
, pid
);
1999 service_set_state(s
, SERVICE_START
);
2001 assert_not_reached("Unknown service type");
2006 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2007 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2010 static void service_enter_start_pre(Service
*s
) {
2015 service_unwatch_control_pid(s
);
2017 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2018 if (s
->control_command
) {
2020 unit_warn_leftover_processes(UNIT(s
));
2022 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2024 r
= service_spawn(s
,
2026 s
->timeout_start_usec
,
2027 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2032 service_set_state(s
, SERVICE_START_PRE
);
2034 service_enter_start(s
);
2039 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2040 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2043 static void service_enter_restart(Service
*s
) {
2044 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2049 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2050 /* Don't restart things if we are going down anyway */
2051 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2053 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2060 /* Any units that are bound to this service must also be
2061 * restarted. We use JOB_RESTART (instead of the more obvious
2062 * JOB_START) here so that those dependency jobs will be added
2064 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_FAIL
, &error
, NULL
);
2068 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2069 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2070 * explicitly however via the usual "systemctl reset-failure" logic. */
2072 s
->flush_n_restarts
= false;
2074 log_struct(LOG_INFO
,
2075 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2076 LOG_UNIT_ID(UNIT(s
)),
2077 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2078 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2079 "N_RESTARTS=%u", s
->n_restarts
);
2081 /* Notify clients about changed restart counter */
2082 unit_add_to_dbus_queue(UNIT(s
));
2084 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2085 * it will be canceled as part of the service_stop() call that
2086 * is executed as part of JOB_RESTART. */
2091 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2092 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2095 static void service_enter_reload_by_notify(Service
*s
) {
2096 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2101 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2102 service_set_state(s
, SERVICE_RELOAD
);
2104 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2105 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2107 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2110 static void service_enter_reload(Service
*s
) {
2115 service_unwatch_control_pid(s
);
2116 s
->reload_result
= SERVICE_SUCCESS
;
2118 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2119 if (s
->control_command
) {
2120 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2122 r
= service_spawn(s
,
2124 s
->timeout_start_usec
,
2125 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
,
2130 service_set_state(s
, SERVICE_RELOAD
);
2132 service_enter_running(s
, SERVICE_SUCCESS
);
2137 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2138 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2139 service_enter_running(s
, SERVICE_SUCCESS
);
2142 static void service_run_next_control(Service
*s
) {
2147 assert(s
->control_command
);
2148 assert(s
->control_command
->command_next
);
2150 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2152 s
->control_command
= s
->control_command
->command_next
;
2153 service_unwatch_control_pid(s
);
2155 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2156 timeout
= s
->timeout_start_usec
;
2158 timeout
= s
->timeout_stop_usec
;
2160 r
= service_spawn(s
,
2163 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2164 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2165 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0),
2173 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2175 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2176 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2177 else if (s
->state
== SERVICE_STOP_POST
)
2178 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2179 else if (s
->state
== SERVICE_RELOAD
) {
2180 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2181 service_enter_running(s
, SERVICE_SUCCESS
);
2183 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2186 static void service_run_next_main(Service
*s
) {
2191 assert(s
->main_command
);
2192 assert(s
->main_command
->command_next
);
2193 assert(s
->type
== SERVICE_ONESHOT
);
2195 s
->main_command
= s
->main_command
->command_next
;
2196 service_unwatch_main_pid(s
);
2198 r
= service_spawn(s
,
2200 s
->timeout_start_usec
,
2201 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2206 service_set_main_pid(s
, pid
);
2211 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2212 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2215 static int service_start(Unit
*u
) {
2216 Service
*s
= SERVICE(u
);
2221 /* We cannot fulfill this request right now, try again later
2223 if (IN_SET(s
->state
,
2224 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2225 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2228 /* Already on it! */
2229 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2232 /* A service that will be restarted must be stopped first to
2233 * trigger BindsTo and/or OnFailure dependencies. If a user
2234 * does not want to wait for the holdoff time to elapse, the
2235 * service should be manually restarted, not started. We
2236 * simply return EAGAIN here, so that any start jobs stay
2237 * queued, and assume that the auto restart timer will
2238 * eventually trigger the restart. */
2239 if (s
->state
== SERVICE_AUTO_RESTART
)
2242 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2244 /* Make sure we don't enter a busy loop of some kind. */
2245 r
= unit_start_limit_test(u
);
2247 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2251 r
= unit_acquire_invocation_id(u
);
2255 s
->result
= SERVICE_SUCCESS
;
2256 s
->reload_result
= SERVICE_SUCCESS
;
2257 s
->main_pid_known
= false;
2258 s
->main_pid_alien
= false;
2259 s
->forbid_restart
= false;
2261 u
->reset_accounting
= true;
2263 s
->status_text
= mfree(s
->status_text
);
2264 s
->status_errno
= 0;
2266 s
->notify_state
= NOTIFY_UNKNOWN
;
2268 s
->watchdog_override_enable
= false;
2269 s
->watchdog_override_usec
= 0;
2271 /* This is not an automatic restart? Flush the restart counter then */
2272 if (s
->flush_n_restarts
) {
2274 s
->flush_n_restarts
= false;
2277 service_enter_start_pre(s
);
2281 static int service_stop(Unit
*u
) {
2282 Service
*s
= SERVICE(u
);
2286 /* Don't create restart jobs from manual stops. */
2287 s
->forbid_restart
= true;
2290 if (IN_SET(s
->state
,
2291 SERVICE_STOP
, SERVICE_STOP_SIGABRT
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2292 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2295 /* A restart will be scheduled or is in progress. */
2296 if (s
->state
== SERVICE_AUTO_RESTART
) {
2297 service_set_state(s
, SERVICE_DEAD
);
2301 /* If there's already something running we go directly into
2303 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
)) {
2304 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2308 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2310 service_enter_stop(s
, SERVICE_SUCCESS
);
2314 static int service_reload(Unit
*u
) {
2315 Service
*s
= SERVICE(u
);
2319 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2321 service_enter_reload(s
);
2325 _pure_
static bool service_can_reload(Unit
*u
) {
2326 Service
*s
= SERVICE(u
);
2330 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2333 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2334 Service
*s
= SERVICE(u
);
2336 ExecCommand
*first
, *c
;
2340 first
= s
->exec_command
[id
];
2342 /* Figure out where we are in the list by walking back to the beginning */
2343 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2349 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2350 Service
*s
= SERVICE(u
);
2351 ServiceExecCommand id
;
2355 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2356 size_t allocated
= 0, length
= 0;
2364 if (command
== s
->control_command
) {
2366 id
= s
->control_command_id
;
2369 id
= SERVICE_EXEC_START
;
2372 idx
= service_exec_command_index(u
, id
, command
);
2374 STRV_FOREACH(arg
, command
->argv
) {
2376 _cleanup_free_
char *e
= NULL
;
2378 e
= xescape(*arg
, WHITESPACE
);
2383 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1 + n
+ 1))
2387 args
[length
++] = ' ';
2389 memcpy(args
+ length
, e
, n
);
2393 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2397 p
= xescape(command
->path
, WHITESPACE
);
2401 fprintf(f
, "%s-command=%s %u %s %s\n", type
, service_exec_command_to_string(id
), idx
, p
, args
);
2406 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2407 Service
*s
= SERVICE(u
);
2415 unit_serialize_item(u
, f
, "state", service_state_to_string(s
->state
));
2416 unit_serialize_item(u
, f
, "result", service_result_to_string(s
->result
));
2417 unit_serialize_item(u
, f
, "reload-result", service_result_to_string(s
->reload_result
));
2419 if (s
->control_pid
> 0)
2420 unit_serialize_item_format(u
, f
, "control-pid", PID_FMT
, s
->control_pid
);
2422 if (s
->main_pid_known
&& s
->main_pid
> 0)
2423 unit_serialize_item_format(u
, f
, "main-pid", PID_FMT
, s
->main_pid
);
2425 unit_serialize_item(u
, f
, "main-pid-known", yes_no(s
->main_pid_known
));
2426 unit_serialize_item(u
, f
, "bus-name-good", yes_no(s
->bus_name_good
));
2427 unit_serialize_item(u
, f
, "bus-name-owner", s
->bus_name_owner
);
2429 unit_serialize_item_format(u
, f
, "n-restarts", "%u", s
->n_restarts
);
2430 unit_serialize_item(u
, f
, "flush-n-restarts", yes_no(s
->flush_n_restarts
));
2432 r
= unit_serialize_item_escaped(u
, f
, "status-text", s
->status_text
);
2436 service_serialize_exec_command(u
, f
, s
->control_command
);
2437 service_serialize_exec_command(u
, f
, s
->main_command
);
2439 r
= unit_serialize_item_fd(u
, f
, fds
, "stdin-fd", s
->stdin_fd
);
2442 r
= unit_serialize_item_fd(u
, f
, fds
, "stdout-fd", s
->stdout_fd
);
2445 r
= unit_serialize_item_fd(u
, f
, fds
, "stderr-fd", s
->stderr_fd
);
2449 if (UNIT_ISSET(s
->accept_socket
)) {
2450 r
= unit_serialize_item(u
, f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2455 r
= unit_serialize_item_fd(u
, f
, fds
, "socket-fd", s
->socket_fd
);
2459 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2460 _cleanup_free_
char *c
= NULL
;
2463 copy
= fdset_put_dup(fds
, fs
->fd
);
2467 c
= cescape(fs
->fdname
);
2469 unit_serialize_item_format(u
, f
, "fd-store-fd", "%i %s", copy
, strempty(c
));
2472 if (s
->main_exec_status
.pid
> 0) {
2473 unit_serialize_item_format(u
, f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2474 dual_timestamp_serialize(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2475 dual_timestamp_serialize(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2477 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2478 unit_serialize_item_format(u
, f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2479 unit_serialize_item_format(u
, f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2483 dual_timestamp_serialize(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2485 unit_serialize_item(u
, f
, "forbid-restart", yes_no(s
->forbid_restart
));
2487 if (s
->watchdog_override_enable
)
2488 unit_serialize_item_format(u
, f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2493 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2494 Service
*s
= SERVICE(u
);
2496 unsigned idx
= 0, i
;
2497 bool control
, found
= false;
2498 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2499 ExecCommand
*command
= NULL
;
2500 _cleanup_free_
char *path
= NULL
;
2501 _cleanup_strv_free_
char **argv
= NULL
;
2503 enum ExecCommandState
{
2504 STATE_EXEC_COMMAND_TYPE
,
2505 STATE_EXEC_COMMAND_INDEX
,
2506 STATE_EXEC_COMMAND_PATH
,
2507 STATE_EXEC_COMMAND_ARGS
,
2508 _STATE_EXEC_COMMAND_MAX
,
2509 _STATE_EXEC_COMMAND_INVALID
= -1,
2516 control
= streq(key
, "control-command");
2518 state
= STATE_EXEC_COMMAND_TYPE
;
2521 _cleanup_free_
char *arg
= NULL
;
2523 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
);
2530 case STATE_EXEC_COMMAND_TYPE
:
2531 id
= service_exec_command_from_string(arg
);
2535 state
= STATE_EXEC_COMMAND_INDEX
;
2537 case STATE_EXEC_COMMAND_INDEX
:
2538 r
= safe_atou(arg
, &idx
);
2542 state
= STATE_EXEC_COMMAND_PATH
;
2544 case STATE_EXEC_COMMAND_PATH
:
2545 path
= TAKE_PTR(arg
);
2546 state
= STATE_EXEC_COMMAND_ARGS
;
2548 if (!path_is_absolute(path
))
2551 case STATE_EXEC_COMMAND_ARGS
:
2552 r
= strv_extend(&argv
, arg
);
2557 assert_not_reached("Unknown error at deserialization of exec command");
2562 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2565 /* Let's check whether exec command on given offset matches data that we just deserialized */
2566 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2570 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2575 /* Command at the index we serialized is different, let's look for command that exactly
2576 * matches but is on different index. If there is no such command we will not resume execution. */
2577 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2578 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2582 if (command
&& control
)
2583 s
->control_command
= command
;
2585 s
->main_command
= command
;
2587 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2592 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2593 Service
*s
= SERVICE(u
);
2601 if (streq(key
, "state")) {
2604 state
= service_state_from_string(value
);
2606 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2608 s
->deserialized_state
= state
;
2609 } else if (streq(key
, "result")) {
2612 f
= service_result_from_string(value
);
2614 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2615 else if (f
!= SERVICE_SUCCESS
)
2618 } else if (streq(key
, "reload-result")) {
2621 f
= service_result_from_string(value
);
2623 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2624 else if (f
!= SERVICE_SUCCESS
)
2625 s
->reload_result
= f
;
2627 } else if (streq(key
, "control-pid")) {
2630 if (parse_pid(value
, &pid
) < 0)
2631 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2633 s
->control_pid
= pid
;
2634 } else if (streq(key
, "main-pid")) {
2637 if (parse_pid(value
, &pid
) < 0)
2638 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2640 (void) service_set_main_pid(s
, pid
);
2641 } else if (streq(key
, "main-pid-known")) {
2644 b
= parse_boolean(value
);
2646 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2648 s
->main_pid_known
= b
;
2649 } else if (streq(key
, "bus-name-good")) {
2652 b
= parse_boolean(value
);
2654 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2656 s
->bus_name_good
= b
;
2657 } else if (streq(key
, "bus-name-owner")) {
2658 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2660 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2661 } else if (streq(key
, "status-text")) {
2664 r
= cunescape(value
, 0, &t
);
2666 log_unit_debug_errno(u
, r
, "Failed to unescape status text: %s", value
);
2668 free(s
->status_text
);
2672 } else if (streq(key
, "accept-socket")) {
2675 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2677 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit: %s", value
);
2679 unit_ref_set(&s
->accept_socket
, u
, socket
);
2680 SOCKET(socket
)->n_connections
++;
2683 } else if (streq(key
, "socket-fd")) {
2686 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2687 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2689 asynchronous_close(s
->socket_fd
);
2690 s
->socket_fd
= fdset_remove(fds
, fd
);
2692 } else if (streq(key
, "fd-store-fd")) {
2697 pf
= strcspn(value
, WHITESPACE
);
2698 fdv
= strndupa(value
, pf
);
2700 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2701 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2703 _cleanup_free_
char *t
= NULL
;
2707 fdn
+= strspn(fdn
, WHITESPACE
);
2708 (void) cunescape(fdn
, 0, &t
);
2710 r
= service_add_fd_store(s
, fd
, t
);
2712 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2714 fdset_remove(fds
, fd
);
2717 } else if (streq(key
, "main-exec-status-pid")) {
2720 if (parse_pid(value
, &pid
) < 0)
2721 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2723 s
->main_exec_status
.pid
= pid
;
2724 } else if (streq(key
, "main-exec-status-code")) {
2727 if (safe_atoi(value
, &i
) < 0)
2728 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2730 s
->main_exec_status
.code
= i
;
2731 } else if (streq(key
, "main-exec-status-status")) {
2734 if (safe_atoi(value
, &i
) < 0)
2735 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2737 s
->main_exec_status
.status
= i
;
2738 } else if (streq(key
, "main-exec-status-start"))
2739 dual_timestamp_deserialize(value
, &s
->main_exec_status
.start_timestamp
);
2740 else if (streq(key
, "main-exec-status-exit"))
2741 dual_timestamp_deserialize(value
, &s
->main_exec_status
.exit_timestamp
);
2742 else if (streq(key
, "watchdog-timestamp"))
2743 dual_timestamp_deserialize(value
, &s
->watchdog_timestamp
);
2744 else if (streq(key
, "forbid-restart")) {
2747 b
= parse_boolean(value
);
2749 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2751 s
->forbid_restart
= b
;
2752 } else if (streq(key
, "stdin-fd")) {
2755 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2756 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2758 asynchronous_close(s
->stdin_fd
);
2759 s
->stdin_fd
= fdset_remove(fds
, fd
);
2760 s
->exec_context
.stdio_as_fds
= true;
2762 } else if (streq(key
, "stdout-fd")) {
2765 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2766 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
2768 asynchronous_close(s
->stdout_fd
);
2769 s
->stdout_fd
= fdset_remove(fds
, fd
);
2770 s
->exec_context
.stdio_as_fds
= true;
2772 } else if (streq(key
, "stderr-fd")) {
2775 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2776 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
2778 asynchronous_close(s
->stderr_fd
);
2779 s
->stderr_fd
= fdset_remove(fds
, fd
);
2780 s
->exec_context
.stdio_as_fds
= true;
2782 } else if (streq(key
, "watchdog-override-usec")) {
2783 usec_t watchdog_override_usec
;
2784 if (timestamp_deserialize(value
, &watchdog_override_usec
) < 0)
2785 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
2787 s
->watchdog_override_enable
= true;
2788 s
->watchdog_override_usec
= watchdog_override_usec
;
2790 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
2791 r
= service_deserialize_exec_command(u
, key
, value
);
2793 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
2795 } else if (streq(key
, "n-restarts")) {
2796 r
= safe_atou(value
, &s
->n_restarts
);
2798 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
2800 } else if (streq(key
, "flush-n-restarts")) {
2801 r
= parse_boolean(value
);
2803 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
2805 s
->flush_n_restarts
= r
;
2807 log_unit_debug(u
, "Unknown serialization key: %s", key
);
2812 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
2813 const UnitActiveState
*table
;
2817 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
2819 return table
[SERVICE(u
)->state
];
2822 static const char *service_sub_state_to_string(Unit
*u
) {
2825 return service_state_to_string(SERVICE(u
)->state
);
2828 static bool service_may_gc(Unit
*u
) {
2829 Service
*s
= SERVICE(u
);
2833 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2834 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2835 * have moved outside of the cgroup. */
2837 if (main_pid_good(s
) > 0 ||
2838 control_pid_good(s
) > 0)
2844 static int service_retry_pid_file(Service
*s
) {
2847 assert(s
->pid_file
);
2848 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
2850 r
= service_load_pid_file(s
, false);
2854 service_unwatch_pid_file(s
);
2856 service_enter_running(s
, SERVICE_SUCCESS
);
2860 static int service_watch_pid_file(Service
*s
) {
2863 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
2865 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_io
);
2869 /* the pidfile might have appeared just before we set the watch */
2870 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
2871 service_retry_pid_file(s
);
2875 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
2876 service_unwatch_pid_file(s
);
2880 static int service_demand_pid_file(Service
*s
) {
2883 assert(s
->pid_file
);
2884 assert(!s
->pid_file_pathspec
);
2886 ps
= new0(PathSpec
, 1);
2891 ps
->path
= strdup(s
->pid_file
);
2897 path_simplify(ps
->path
, false);
2899 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2900 * keep their PID file open all the time. */
2901 ps
->type
= PATH_MODIFIED
;
2902 ps
->inotify_fd
= -1;
2904 s
->pid_file_pathspec
= ps
;
2906 return service_watch_pid_file(s
);
2909 static int service_dispatch_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
2910 PathSpec
*p
= userdata
;
2915 s
= SERVICE(p
->unit
);
2919 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
2920 assert(s
->pid_file_pathspec
);
2921 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
2923 log_unit_debug(UNIT(s
), "inotify event");
2925 if (path_spec_fd_event(p
, events
) < 0)
2928 if (service_retry_pid_file(s
) == 0)
2931 if (service_watch_pid_file(s
) < 0)
2937 service_unwatch_pid_file(s
);
2938 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2942 static void service_notify_cgroup_empty_event(Unit
*u
) {
2943 Service
*s
= SERVICE(u
);
2947 log_unit_debug(u
, "cgroup is empty");
2951 /* Waiting for SIGCHLD is usually more interesting,
2952 * because it includes return codes/signals. Which is
2953 * why we ignore the cgroup events for most cases,
2954 * except when we don't know pid which to expect the
2958 if (s
->type
== SERVICE_NOTIFY
&&
2959 main_pid_good(s
) == 0 &&
2960 control_pid_good(s
) == 0) {
2961 /* No chance of getting a ready notification anymore */
2962 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
2967 case SERVICE_START_POST
:
2968 if (s
->pid_file_pathspec
&&
2969 main_pid_good(s
) == 0 &&
2970 control_pid_good(s
) == 0) {
2972 /* Give up hoping for the daemon to write its PID file */
2973 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
2975 service_unwatch_pid_file(s
);
2976 if (s
->state
== SERVICE_START
)
2977 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
2979 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
2983 case SERVICE_RUNNING
:
2984 /* service_enter_running() will figure out what to do */
2985 service_enter_running(s
, SERVICE_SUCCESS
);
2988 case SERVICE_STOP_SIGABRT
:
2989 case SERVICE_STOP_SIGTERM
:
2990 case SERVICE_STOP_SIGKILL
:
2992 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
2993 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2997 case SERVICE_STOP_POST
:
2998 case SERVICE_FINAL_SIGTERM
:
2999 case SERVICE_FINAL_SIGKILL
:
3000 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3001 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3010 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3011 bool notify_dbus
= true;
3012 Service
*s
= SERVICE(u
);
3018 if (is_clean_exit(code
, status
, s
->type
== SERVICE_ONESHOT
? EXIT_CLEAN_COMMAND
: EXIT_CLEAN_DAEMON
, &s
->success_status
))
3019 f
= SERVICE_SUCCESS
;
3020 else if (code
== CLD_EXITED
)
3021 f
= SERVICE_FAILURE_EXIT_CODE
;
3022 else if (code
== CLD_KILLED
)
3023 f
= SERVICE_FAILURE_SIGNAL
;
3024 else if (code
== CLD_DUMPED
)
3025 f
= SERVICE_FAILURE_CORE_DUMP
;
3027 assert_not_reached("Unknown code");
3029 if (s
->main_pid
== pid
) {
3030 /* Forking services may occasionally move to a new PID.
3031 * As long as they update the PID file before exiting the old
3032 * PID, they're fine. */
3033 if (service_load_pid_file(s
, false) > 0)
3037 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3039 if (s
->main_command
) {
3040 /* If this is not a forking service than the
3041 * main process got started and hence we copy
3042 * the exit status so that it is recorded both
3043 * as main and as control process exit
3046 s
->main_command
->exec_status
= s
->main_exec_status
;
3048 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3049 f
= SERVICE_SUCCESS
;
3050 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3052 /* If this is a forked process, then we should
3053 * ignore the return value if this was
3054 * configured for the starter process */
3056 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3057 f
= SERVICE_SUCCESS
;
3060 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3061 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3062 * that the service already logged the reason at a higher log level on its own. However, if the service
3063 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
3064 * our log level to WARNING then. */
3066 log_struct(f
== SERVICE_SUCCESS
? LOG_DEBUG
:
3067 (code
== CLD_EXITED
? LOG_NOTICE
: LOG_WARNING
),
3068 LOG_UNIT_MESSAGE(u
, "Main process exited, code=%s, status=%i/%s",
3069 sigchld_code_to_string(code
), status
,
3070 strna(code
== CLD_EXITED
3071 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
3072 : signal_to_string(status
))),
3073 "EXIT_CODE=%s", sigchld_code_to_string(code
),
3074 "EXIT_STATUS=%i", status
,
3076 LOG_UNIT_INVOCATION_ID(u
));
3078 if (s
->result
== SERVICE_SUCCESS
)
3081 if (s
->main_command
&&
3082 s
->main_command
->command_next
&&
3083 s
->type
== SERVICE_ONESHOT
&&
3084 f
== SERVICE_SUCCESS
) {
3086 /* There is another command to *
3087 * execute, so let's do that. */
3089 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3090 service_run_next_main(s
);
3094 /* The service exited, so the service is officially
3096 s
->main_command
= NULL
;
3100 case SERVICE_START_POST
:
3101 case SERVICE_RELOAD
:
3103 /* Need to wait until the operation is
3108 if (s
->type
== SERVICE_ONESHOT
) {
3109 /* This was our main goal, so let's go on */
3110 if (f
== SERVICE_SUCCESS
)
3111 service_enter_start_post(s
);
3113 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3115 } else if (s
->type
== SERVICE_NOTIFY
) {
3116 /* Only enter running through a notification, so that the
3117 * SERVICE_START state signifies that no ready notification
3118 * has been received */
3119 if (f
!= SERVICE_SUCCESS
)
3120 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3121 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3122 /* The service has never been and will never be active */
3123 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3128 case SERVICE_RUNNING
:
3129 service_enter_running(s
, f
);
3132 case SERVICE_STOP_SIGABRT
:
3133 case SERVICE_STOP_SIGTERM
:
3134 case SERVICE_STOP_SIGKILL
:
3136 if (control_pid_good(s
) <= 0)
3137 service_enter_stop_post(s
, f
);
3139 /* If there is still a control process, wait for that first */
3142 case SERVICE_STOP_POST
:
3143 case SERVICE_FINAL_SIGTERM
:
3144 case SERVICE_FINAL_SIGKILL
:
3146 if (control_pid_good(s
) <= 0)
3147 service_enter_dead(s
, f
, true);
3151 assert_not_reached("Uh, main process died at wrong time.");
3155 } else if (s
->control_pid
== pid
) {
3158 if (s
->control_command
) {
3159 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3161 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3162 f
= SERVICE_SUCCESS
;
3165 log_unit_full(u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
, 0,
3166 "Control process exited, code=%s status=%i",
3167 sigchld_code_to_string(code
), status
);
3169 if (s
->result
== SERVICE_SUCCESS
)
3172 if (s
->control_command
&&
3173 s
->control_command
->command_next
&&
3174 f
== SERVICE_SUCCESS
) {
3176 /* There is another command to *
3177 * execute, so let's do that. */
3179 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3180 service_run_next_control(s
);
3183 /* No further commands for this step, so let's
3184 * figure out what to do next */
3186 s
->control_command
= NULL
;
3187 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3189 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3193 case SERVICE_START_PRE
:
3194 if (f
== SERVICE_SUCCESS
)
3195 service_enter_start(s
);
3197 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3201 if (s
->type
!= SERVICE_FORKING
)
3202 /* Maybe spurious event due to a reload that changed the type? */
3205 if (f
!= SERVICE_SUCCESS
) {
3206 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3211 bool has_start_post
;
3214 /* Let's try to load the pid file here if we can.
3215 * The PID file might actually be created by a START_POST
3216 * script. In that case don't worry if the loading fails. */
3218 has_start_post
= !!s
->exec_command
[SERVICE_EXEC_START_POST
];
3219 r
= service_load_pid_file(s
, !has_start_post
);
3220 if (!has_start_post
&& r
< 0) {
3221 r
= service_demand_pid_file(s
);
3222 if (r
< 0 || cgroup_good(s
) == 0)
3223 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3227 service_search_main_pid(s
);
3229 service_enter_start_post(s
);
3232 case SERVICE_START_POST
:
3233 if (f
!= SERVICE_SUCCESS
) {
3234 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3241 r
= service_load_pid_file(s
, true);
3243 r
= service_demand_pid_file(s
);
3244 if (r
< 0 || cgroup_good(s
) == 0)
3245 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3249 service_search_main_pid(s
);
3251 service_enter_running(s
, SERVICE_SUCCESS
);
3254 case SERVICE_RELOAD
:
3255 if (f
== SERVICE_SUCCESS
)
3256 if (service_load_pid_file(s
, true) < 0)
3257 service_search_main_pid(s
);
3259 s
->reload_result
= f
;
3260 service_enter_running(s
, SERVICE_SUCCESS
);
3264 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3267 case SERVICE_STOP_SIGABRT
:
3268 case SERVICE_STOP_SIGTERM
:
3269 case SERVICE_STOP_SIGKILL
:
3270 if (main_pid_good(s
) <= 0)
3271 service_enter_stop_post(s
, f
);
3273 /* If there is still a service
3274 * process around, wait until
3275 * that one quit, too */
3278 case SERVICE_STOP_POST
:
3279 case SERVICE_FINAL_SIGTERM
:
3280 case SERVICE_FINAL_SIGKILL
:
3281 if (main_pid_good(s
) <= 0)
3282 service_enter_dead(s
, f
, true);
3286 assert_not_reached("Uh, control process died at wrong time.");
3289 } else /* Neither control nor main PID? If so, don't notify about anything */
3290 notify_dbus
= false;
3292 /* Notify clients about changed exit status */
3294 unit_add_to_dbus_queue(u
);
3296 /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to watch,
3297 * under the assumption that we'll sooner or later get a SIGCHLD for them, as the original process we watched
3298 * was probably the parent of them, and they are hence now our children. */
3299 (void) unit_enqueue_rewatch_pids(u
);
3302 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3303 Service
*s
= SERVICE(userdata
);
3306 assert(source
== s
->timer_event_source
);
3310 case SERVICE_START_PRE
:
3312 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", s
->state
== SERVICE_START
? "Start" : "Start-pre");
3313 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3316 case SERVICE_START_POST
:
3317 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3318 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3321 case SERVICE_RUNNING
:
3322 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3323 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3326 case SERVICE_RELOAD
:
3327 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3328 service_kill_control_process(s
);
3329 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3330 service_enter_running(s
, SERVICE_SUCCESS
);
3334 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3335 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3338 case SERVICE_STOP_SIGABRT
:
3339 log_unit_warning(UNIT(s
), "State 'stop-sigabrt' timed out. Terminating.");
3340 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3343 case SERVICE_STOP_SIGTERM
:
3344 if (s
->kill_context
.send_sigkill
) {
3345 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3346 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3348 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3349 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3354 case SERVICE_STOP_SIGKILL
:
3355 /* Uh, we sent a SIGKILL and it is still not gone?
3356 * Must be something we cannot kill, so let's just be
3357 * weirded out and continue */
3359 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3360 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3363 case SERVICE_STOP_POST
:
3364 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3365 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3368 case SERVICE_FINAL_SIGTERM
:
3369 if (s
->kill_context
.send_sigkill
) {
3370 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3371 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3373 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3374 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3379 case SERVICE_FINAL_SIGKILL
:
3380 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3381 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3384 case SERVICE_AUTO_RESTART
:
3385 if (s
->restart_usec
> 0) {
3386 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3387 log_unit_info(UNIT(s
),
3388 "Service RestartSec=%s expired, scheduling restart.",
3389 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3391 log_unit_info(UNIT(s
),
3392 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3394 service_enter_restart(s
);
3398 assert_not_reached("Timeout at wrong time.");
3404 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3405 Service
*s
= SERVICE(userdata
);
3406 char t
[FORMAT_TIMESPAN_MAX
];
3407 usec_t watchdog_usec
;
3410 assert(source
== s
->watchdog_event_source
);
3412 watchdog_usec
= service_get_watchdog_usec(s
);
3414 if (UNIT(s
)->manager
->service_watchdogs
) {
3415 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3416 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3418 service_enter_signal(s
, SERVICE_STOP_SIGABRT
, SERVICE_FAILURE_WATCHDOG
);
3420 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3421 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3426 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3429 if (s
->notify_access
== NOTIFY_NONE
) {
3430 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3434 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3435 if (s
->main_pid
!= 0)
3436 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
);
3438 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
);
3443 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3444 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3445 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
,
3446 pid
, s
->main_pid
, s
->control_pid
);
3447 else if (s
->main_pid
!= 0)
3448 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
);
3449 else if (s
->control_pid
!= 0)
3450 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
);
3452 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
);
3460 static void service_notify_message(
3462 const struct ucred
*ucred
,
3466 Service
*s
= SERVICE(u
);
3467 bool notify_dbus
= false;
3475 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3478 if (DEBUG_LOGGING
) {
3479 _cleanup_free_
char *cc
= NULL
;
3481 cc
= strv_join(tags
, ", ");
3482 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3485 /* Interpret MAINPID= */
3486 e
= strv_find_startswith(tags
, "MAINPID=");
3487 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3490 if (parse_pid(e
, &new_main_pid
) < 0)
3491 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3492 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3494 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3496 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3498 if (ucred
->uid
== 0) {
3499 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
);
3502 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3505 service_set_main_pid(s
, new_main_pid
);
3506 unit_watch_pid(UNIT(s
), new_main_pid
);
3512 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3513 STRV_FOREACH_BACKWARDS(i
, tags
) {
3515 if (streq(*i
, "READY=1")) {
3516 s
->notify_state
= NOTIFY_READY
;
3518 /* Type=notify services inform us about completed
3519 * initialization with READY=1 */
3520 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3521 service_enter_start_post(s
);
3523 /* Sending READY=1 while we are reloading informs us
3524 * that the reloading is complete */
3525 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3526 service_enter_running(s
, SERVICE_SUCCESS
);
3531 } else if (streq(*i
, "RELOADING=1")) {
3532 s
->notify_state
= NOTIFY_RELOADING
;
3534 if (s
->state
== SERVICE_RUNNING
)
3535 service_enter_reload_by_notify(s
);
3540 } else if (streq(*i
, "STOPPING=1")) {
3541 s
->notify_state
= NOTIFY_STOPPING
;
3543 if (s
->state
== SERVICE_RUNNING
)
3544 service_enter_stop_by_notify(s
);
3551 /* Interpret STATUS= */
3552 e
= strv_find_startswith(tags
, "STATUS=");
3554 _cleanup_free_
char *t
= NULL
;
3557 if (!utf8_is_valid(e
))
3558 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean.");
3566 if (!streq_ptr(s
->status_text
, t
)) {
3567 free_and_replace(s
->status_text
, t
);
3572 /* Interpret ERRNO= */
3573 e
= strv_find_startswith(tags
, "ERRNO=");
3577 status_errno
= parse_errno(e
);
3578 if (status_errno
< 0)
3579 log_unit_warning_errno(u
, status_errno
,
3580 "Failed to parse ERRNO= field in notification message: %s", e
);
3581 else if (s
->status_errno
!= status_errno
) {
3582 s
->status_errno
= status_errno
;
3587 /* Interpret EXTEND_TIMEOUT= */
3588 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3590 usec_t extend_timeout_usec
;
3591 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3592 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3594 service_extend_timeout(s
, extend_timeout_usec
);
3597 /* Interpret WATCHDOG= */
3598 if (strv_find(tags
, "WATCHDOG=1"))
3599 service_reset_watchdog(s
);
3601 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
3603 usec_t watchdog_override_usec
;
3604 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
3605 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
3607 service_reset_watchdog_timeout(s
, watchdog_override_usec
);
3610 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3611 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3612 * fds, but optional when pushing in new fds, for compatibility reasons. */
3613 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
3616 name
= strv_find_startswith(tags
, "FDNAME=");
3617 if (!name
|| !fdname_is_valid(name
))
3618 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3620 service_remove_fd_store(s
, name
);
3622 } else if (strv_find(tags
, "FDSTORE=1")) {
3625 name
= strv_find_startswith(tags
, "FDNAME=");
3626 if (name
&& !fdname_is_valid(name
)) {
3627 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
3631 (void) service_add_fd_store_set(s
, fds
, name
);
3634 /* Notify clients about changed status or main pid */
3636 unit_add_to_dbus_queue(u
);
3639 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
3640 Service
*s
= SERVICE(u
);
3644 if (!s
->timer_event_source
)
3647 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3650 if (t
== USEC_INFINITY
)
3657 static void service_bus_name_owner_change(
3660 const char *old_owner
,
3661 const char *new_owner
) {
3663 Service
*s
= SERVICE(u
);
3669 assert(streq(s
->bus_name
, name
));
3670 assert(old_owner
|| new_owner
);
3672 if (old_owner
&& new_owner
)
3673 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", name
, old_owner
, new_owner
);
3675 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", name
, old_owner
);
3677 log_unit_debug(u
, "D-Bus name %s now registered by %s", name
, new_owner
);
3679 s
->bus_name_good
= !!new_owner
;
3681 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3682 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
3684 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
3688 if (s
->type
== SERVICE_DBUS
) {
3690 /* service_enter_running() will figure out what to
3692 if (s
->state
== SERVICE_RUNNING
)
3693 service_enter_running(s
, SERVICE_SUCCESS
);
3694 else if (s
->state
== SERVICE_START
&& new_owner
)
3695 service_enter_start_post(s
);
3697 } else if (new_owner
&&
3705 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
3708 /* Try to acquire PID from bus service */
3710 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, name
, SD_BUS_CREDS_PID
, &creds
);
3712 r
= sd_bus_creds_get_pid(creds
, &pid
);
3714 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, name
, pid
);
3716 service_set_main_pid(s
, pid
);
3717 unit_watch_pid(UNIT(s
), pid
);
3722 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
3723 _cleanup_free_
char *peer
= NULL
;
3729 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3730 * to be configured. We take ownership of the passed fd on success. */
3732 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
3735 if (s
->socket_fd
>= 0)
3738 if (s
->state
!= SERVICE_DEAD
)
3741 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
3743 if (UNIT(s
)->description
) {
3744 _cleanup_free_
char *a
;
3746 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
3750 r
= unit_set_description(UNIT(s
), a
);
3752 r
= unit_set_description(UNIT(s
), peer
);
3758 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
3763 s
->socket_fd_selinux_context_net
= selinux_context_net
;
3765 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
3769 static void service_reset_failed(Unit
*u
) {
3770 Service
*s
= SERVICE(u
);
3774 if (s
->state
== SERVICE_FAILED
)
3775 service_set_state(s
, SERVICE_DEAD
);
3777 s
->result
= SERVICE_SUCCESS
;
3778 s
->reload_result
= SERVICE_SUCCESS
;
3780 s
->flush_n_restarts
= false;
3783 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
3784 Service
*s
= SERVICE(u
);
3788 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
3791 static int service_main_pid(Unit
*u
) {
3792 Service
*s
= SERVICE(u
);
3799 static int service_control_pid(Unit
*u
) {
3800 Service
*s
= SERVICE(u
);
3804 return s
->control_pid
;
3807 static bool service_needs_console(Unit
*u
) {
3808 Service
*s
= SERVICE(u
);
3812 /* We provide our own implementation of this here, instead of relying of the generic implementation
3813 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
3815 if (!exec_context_may_touch_console(&s
->exec_context
))
3818 return IN_SET(s
->state
,
3825 SERVICE_STOP_SIGABRT
,
3826 SERVICE_STOP_SIGTERM
,
3827 SERVICE_STOP_SIGKILL
,
3829 SERVICE_FINAL_SIGTERM
,
3830 SERVICE_FINAL_SIGKILL
);
3833 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
3834 [SERVICE_RESTART_NO
] = "no",
3835 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
3836 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
3837 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
3838 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
3839 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
3840 [SERVICE_RESTART_ALWAYS
] = "always",
3843 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
3845 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
3846 [SERVICE_SIMPLE
] = "simple",
3847 [SERVICE_FORKING
] = "forking",
3848 [SERVICE_ONESHOT
] = "oneshot",
3849 [SERVICE_DBUS
] = "dbus",
3850 [SERVICE_NOTIFY
] = "notify",
3851 [SERVICE_IDLE
] = "idle"
3854 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
3856 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
3857 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
3858 [SERVICE_EXEC_START
] = "ExecStart",
3859 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
3860 [SERVICE_EXEC_RELOAD
] = "ExecReload",
3861 [SERVICE_EXEC_STOP
] = "ExecStop",
3862 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
3865 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
3867 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
3868 [NOTIFY_UNKNOWN
] = "unknown",
3869 [NOTIFY_READY
] = "ready",
3870 [NOTIFY_RELOADING
] = "reloading",
3871 [NOTIFY_STOPPING
] = "stopping",
3874 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
3876 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
3877 [SERVICE_SUCCESS
] = "success",
3878 [SERVICE_FAILURE_RESOURCES
] = "resources",
3879 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
3880 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
3881 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
3882 [SERVICE_FAILURE_SIGNAL
] = "signal",
3883 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
3884 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
3885 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
3888 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
3890 const UnitVTable service_vtable
= {
3891 .object_size
= sizeof(Service
),
3892 .exec_context_offset
= offsetof(Service
, exec_context
),
3893 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
3894 .kill_context_offset
= offsetof(Service
, kill_context
),
3895 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
3896 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
3902 .private_section
= "Service",
3904 .can_transient
= true,
3905 .can_delegate
= true,
3907 .init
= service_init
,
3908 .done
= service_done
,
3909 .load
= service_load
,
3910 .release_resources
= service_release_resources
,
3912 .coldplug
= service_coldplug
,
3914 .dump
= service_dump
,
3916 .start
= service_start
,
3917 .stop
= service_stop
,
3918 .reload
= service_reload
,
3920 .can_reload
= service_can_reload
,
3922 .kill
= service_kill
,
3924 .serialize
= service_serialize
,
3925 .deserialize_item
= service_deserialize_item
,
3927 .active_state
= service_active_state
,
3928 .sub_state_to_string
= service_sub_state_to_string
,
3930 .will_restart
= service_will_restart
,
3932 .may_gc
= service_may_gc
,
3934 .sigchld_event
= service_sigchld_event
,
3936 .reset_failed
= service_reset_failed
,
3938 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
3939 .notify_message
= service_notify_message
,
3941 .main_pid
= service_main_pid
,
3942 .control_pid
= service_control_pid
,
3944 .bus_name_owner_change
= service_bus_name_owner_change
,
3946 .bus_vtable
= bus_service_vtable
,
3947 .bus_set_property
= bus_service_set_property
,
3948 .bus_commit_properties
= bus_service_commit_properties
,
3950 .get_timeout
= service_get_timeout
,
3951 .needs_console
= service_needs_console
,
3953 .status_message_formats
= {
3954 .starting_stopping
= {
3955 [0] = "Starting %s...",
3956 [1] = "Stopping %s...",
3958 .finished_start_job
= {
3959 [JOB_DONE
] = "Started %s.",
3960 [JOB_FAILED
] = "Failed to start %s.",
3962 .finished_stop_job
= {
3963 [JOB_DONE
] = "Stopped %s.",
3964 [JOB_FAILED
] = "Stopped (with error) %s.",