1 /* SPDX-License-Identifier: LGPL-2.1+ */
8 #include "sd-messages.h"
10 #include "alloc-util.h"
12 #include "bus-error.h"
13 #include "bus-kernel.h"
15 #include "dbus-service.h"
16 #include "dbus-unit.h"
20 #include "exit-status.h"
23 #include "format-util.h"
25 #include "load-dropin.h"
26 #include "load-fragment.h"
29 #include "parse-util.h"
30 #include "path-util.h"
31 #include "process-util.h"
32 #include "serialize.h"
34 #include "signal-util.h"
36 #include "stdio-util.h"
37 #include "string-table.h"
38 #include "string-util.h"
40 #include "unit-name.h"
45 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
46 [SERVICE_DEAD
] = UNIT_INACTIVE
,
47 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
48 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
49 [SERVICE_START
] = UNIT_ACTIVATING
,
50 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
51 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
52 [SERVICE_EXITED
] = UNIT_ACTIVE
,
53 [SERVICE_RELOAD
] = UNIT_RELOADING
,
54 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
55 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
59 [SERVICE_FINAL_WATCHDOG
] = 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
,
64 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
67 /* For Type=idle we never want to delay any other jobs, hence we
68 * consider idle jobs active as soon as we start working on them */
69 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
70 [SERVICE_DEAD
] = UNIT_INACTIVE
,
71 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
72 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
73 [SERVICE_START
] = UNIT_ACTIVE
,
74 [SERVICE_START_POST
] = UNIT_ACTIVE
,
75 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
76 [SERVICE_EXITED
] = UNIT_ACTIVE
,
77 [SERVICE_RELOAD
] = UNIT_RELOADING
,
78 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
79 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
80 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
81 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
82 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
83 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
84 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
85 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
86 [SERVICE_FAILED
] = UNIT_FAILED
,
87 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
88 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
91 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
92 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
93 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
94 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
96 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
97 static void service_enter_reload_by_notify(Service
*s
);
99 static void service_init(Unit
*u
) {
100 Service
*s
= SERVICE(u
);
103 assert(u
->load_state
== UNIT_STUB
);
105 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
106 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
107 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
108 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
109 s
->restart_usec
= u
->manager
->default_restart_usec
;
110 s
->runtime_max_usec
= USEC_INFINITY
;
111 s
->type
= _SERVICE_TYPE_INVALID
;
113 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
114 s
->guess_main_pid
= true;
116 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
118 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
119 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
121 s
->watchdog_original_usec
= USEC_INFINITY
;
123 s
->oom_policy
= _OOM_POLICY_INVALID
;
126 static void service_unwatch_control_pid(Service
*s
) {
129 if (s
->control_pid
<= 0)
132 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
136 static void service_unwatch_main_pid(Service
*s
) {
139 if (s
->main_pid
<= 0)
142 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
146 static void service_unwatch_pid_file(Service
*s
) {
147 if (!s
->pid_file_pathspec
)
150 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
151 path_spec_unwatch(s
->pid_file_pathspec
);
152 path_spec_done(s
->pid_file_pathspec
);
153 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
156 static int service_set_main_pid(Service
*s
, pid_t pid
) {
162 if (pid
== getpid_cached())
165 if (s
->main_pid
== pid
&& s
->main_pid_known
)
168 if (s
->main_pid
!= pid
) {
169 service_unwatch_main_pid(s
);
170 exec_status_start(&s
->main_exec_status
, pid
);
174 s
->main_pid_known
= true;
175 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
177 if (s
->main_pid_alien
)
178 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
183 void service_close_socket_fd(Service
*s
) {
186 /* Undo the effect of service_set_socket_fd(). */
188 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
190 if (UNIT_ISSET(s
->accept_socket
)) {
191 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
192 unit_ref_unset(&s
->accept_socket
);
196 static void service_stop_watchdog(Service
*s
) {
199 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
200 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
203 static void service_start_watchdog(Service
*s
) {
204 usec_t watchdog_usec
;
209 watchdog_usec
= service_get_watchdog_usec(s
);
210 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
211 service_stop_watchdog(s
);
215 if (s
->watchdog_event_source
) {
216 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
218 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
222 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
224 r
= sd_event_add_time(
225 UNIT(s
)->manager
->event
,
226 &s
->watchdog_event_source
,
228 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
229 service_dispatch_watchdog
, s
);
231 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
235 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
237 /* Let's process everything else which might be a sign
238 * of living before we consider a service died. */
239 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
242 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
245 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
251 /* Extends the specified event source timer to at least the specified time, unless it is already later
257 r
= sd_event_source_get_time(source
, ¤t
);
260 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
261 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
265 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
268 r
= sd_event_source_set_time(source
, extended
);
271 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
272 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
276 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
281 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
284 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
286 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
287 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
290 static void service_reset_watchdog(Service
*s
) {
293 dual_timestamp_get(&s
->watchdog_timestamp
);
294 service_start_watchdog(s
);
297 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
300 s
->watchdog_override_enable
= true;
301 s
->watchdog_override_usec
= watchdog_override_usec
;
302 service_reset_watchdog(s
);
304 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
305 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
308 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
314 assert(fs
->service
->n_fd_store
> 0);
315 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
316 fs
->service
->n_fd_store
--;
319 sd_event_source_disable_unref(fs
->event_source
);
326 static void service_release_fd_store(Service
*s
) {
329 if (s
->n_keep_fd_store
> 0)
332 log_unit_debug(UNIT(s
), "Releasing all stored fds");
334 service_fd_store_unlink(s
->fd_store
);
336 assert(s
->n_fd_store
== 0);
339 static void service_release_resources(Unit
*u
) {
340 Service
*s
= SERVICE(u
);
344 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
347 log_unit_debug(u
, "Releasing resources.");
349 s
->stdin_fd
= safe_close(s
->stdin_fd
);
350 s
->stdout_fd
= safe_close(s
->stdout_fd
);
351 s
->stderr_fd
= safe_close(s
->stderr_fd
);
353 service_release_fd_store(s
);
356 static void service_done(Unit
*u
) {
357 Service
*s
= SERVICE(u
);
361 s
->pid_file
= mfree(s
->pid_file
);
362 s
->status_text
= mfree(s
->status_text
);
364 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
365 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
366 s
->control_command
= NULL
;
367 s
->main_command
= NULL
;
369 dynamic_creds_unref(&s
->dynamic_creds
);
371 exit_status_set_free(&s
->restart_prevent_status
);
372 exit_status_set_free(&s
->restart_force_status
);
373 exit_status_set_free(&s
->success_status
);
375 /* This will leak a process, but at least no memory or any of
377 service_unwatch_main_pid(s
);
378 service_unwatch_control_pid(s
);
379 service_unwatch_pid_file(s
);
382 unit_unwatch_bus_name(u
, s
->bus_name
);
383 s
->bus_name
= mfree(s
->bus_name
);
386 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
388 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
389 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
391 service_close_socket_fd(s
);
392 s
->peer
= socket_peer_unref(s
->peer
);
394 unit_ref_unset(&s
->accept_socket
);
396 service_stop_watchdog(s
);
398 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
399 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
401 service_release_resources(u
);
404 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
405 ServiceFDStore
*fs
= userdata
;
410 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
411 log_unit_debug(UNIT(fs
->service
),
412 "Received %s on stored fd %d (%s), closing.",
413 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
414 fs
->fd
, strna(fs
->fdname
));
415 service_fd_store_unlink(fs
);
419 static int service_add_fd_store(Service
*s
, int fd
, const char *name
, bool do_poll
) {
423 /* fd is always consumed if we return >= 0 */
428 if (s
->n_fd_store
>= s
->n_fd_store_max
)
429 return -EXFULL
; /* Our store is full.
430 * Use this errno rather than E[NM]FILE to distinguish from
431 * the case where systemd itself hits the file limit. */
433 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
434 r
= same_fd(fs
->fd
, fd
);
439 return 0; /* fd already included */
443 fs
= new(ServiceFDStore
, 1);
447 *fs
= (ServiceFDStore
) {
451 .fdname
= strdup(name
?: "stored"),
460 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
461 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
466 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
469 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
472 return 1; /* fd newly stored */
475 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
480 while (fdset_size(fds
) > 0) {
481 _cleanup_close_
int fd
= -1;
483 fd
= fdset_steal_first(fds
);
487 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
489 return log_unit_warning_errno(UNIT(s
), r
,
490 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
493 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
495 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
502 static void service_remove_fd_store(Service
*s
, const char *name
) {
503 ServiceFDStore
*fs
, *n
;
508 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
509 if (!streq(fs
->fdname
, name
))
512 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
513 service_fd_store_unlink(fs
);
517 static int service_arm_timer(Service
*s
, usec_t usec
) {
522 if (s
->timer_event_source
) {
523 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
527 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
530 if (usec
== USEC_INFINITY
)
533 r
= sd_event_add_time(
534 UNIT(s
)->manager
->event
,
535 &s
->timer_event_source
,
538 service_dispatch_timer
, s
);
542 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
547 static int service_verify(Service
*s
) {
549 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
551 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
552 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
553 /* FailureAction= only makes sense if one of the start or stop commands is specified.
554 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
555 * either a command or SuccessAction= are required. */
557 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
561 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
562 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
566 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
567 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
571 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
572 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
576 if (s
->type
== SERVICE_ONESHOT
577 && !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
)) {
578 log_unit_error(UNIT(s
), "Service has Restart= set to either always or on-success, which isn't allowed for Type=oneshot services. Refusing.");
582 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
583 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
587 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
588 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
592 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
593 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
595 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
596 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
600 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
601 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
603 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
604 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
606 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
607 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
612 static int service_add_default_dependencies(Service
*s
) {
617 if (!UNIT(s
)->default_dependencies
)
620 /* Add a number of automatic dependencies useful for the
621 * majority of services. */
623 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
624 /* First, pull in the really early boot stuff, and
625 * require it, so that we fail if we can't acquire
628 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
633 /* In the --user instance there's no sysinit.target,
634 * in that case require basic.target instead. */
636 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
641 /* Second, if the rest of the base system is in the same
642 * transaction, order us after it, but do not pull it in or
643 * even require it. */
644 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
648 /* Third, add us in for normal shutdown. */
649 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
652 static void service_fix_stdio(Service
*s
) {
655 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
656 * default value that is subject to automatic overriding triggered by other settings and an explicit
657 * choice the user can make. We don't distinguish between these cases currently. */
659 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
660 s
->exec_context
.stdin_data_size
> 0)
661 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
663 if (IN_SET(s
->exec_context
.std_input
,
665 EXEC_INPUT_TTY_FORCE
,
668 EXEC_INPUT_NAMED_FD
))
671 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
672 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
673 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
674 * duplicated for both input and output at the same time (since they then would cause a feedback
675 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
677 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
678 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
679 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
681 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
682 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
685 static int service_setup_bus_name(Service
*s
) {
693 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
695 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
697 /* We always want to be ordered against dbus.socket if both are in the transaction. */
698 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
700 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
702 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
704 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
706 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
711 static int service_add_extras(Service
*s
) {
716 if (s
->type
== _SERVICE_TYPE_INVALID
) {
717 /* Figure out a type automatically */
719 s
->type
= SERVICE_DBUS
;
720 else if (s
->exec_command
[SERVICE_EXEC_START
])
721 s
->type
= SERVICE_SIMPLE
;
723 s
->type
= SERVICE_ONESHOT
;
726 /* Oneshot services have disabled start timeout by default */
727 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
728 s
->timeout_start_usec
= USEC_INFINITY
;
730 service_fix_stdio(s
);
732 r
= unit_patch_contexts(UNIT(s
));
736 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
740 r
= unit_set_default_slice(UNIT(s
));
744 /* If the service needs the notify socket, let's enable it automatically. */
745 if (s
->notify_access
== NOTIFY_NONE
&&
746 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
747 s
->notify_access
= NOTIFY_MAIN
;
749 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
750 * delegation is on, in that case it we assume the payload knows better what to do and can process
751 * things in a more focused way. */
752 if (s
->oom_policy
< 0)
753 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
755 /* Let the kernel do the killing if that's requested. */
756 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
758 r
= service_add_default_dependencies(s
);
762 r
= service_setup_bus_name(s
);
769 static int service_load(Unit
*u
) {
770 Service
*s
= SERVICE(u
);
773 r
= unit_load_fragment_and_dropin(u
, true);
777 if (u
->load_state
!= UNIT_LOADED
)
780 /* This is a new unit? Then let's add in some extras */
781 r
= service_add_extras(s
);
785 return service_verify(s
);
788 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
789 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
],
790 buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
], buf_abort
[FORMAT_TIMESPAN_MAX
];
791 ServiceExecCommand c
;
792 Service
*s
= SERVICE(u
);
797 prefix
= strempty(prefix
);
798 prefix2
= strjoina(prefix
, "\t");
801 "%sService State: %s\n"
803 "%sReload Result: %s\n"
804 "%sClean Result: %s\n"
805 "%sPermissionsStartOnly: %s\n"
806 "%sRootDirectoryStartOnly: %s\n"
807 "%sRemainAfterExit: %s\n"
808 "%sGuessMainPID: %s\n"
811 "%sNotifyAccess: %s\n"
812 "%sNotifyState: %s\n"
814 prefix
, service_state_to_string(s
->state
),
815 prefix
, service_result_to_string(s
->result
),
816 prefix
, service_result_to_string(s
->reload_result
),
817 prefix
, service_result_to_string(s
->clean_result
),
818 prefix
, yes_no(s
->permissions_start_only
),
819 prefix
, yes_no(s
->root_directory_start_only
),
820 prefix
, yes_no(s
->remain_after_exit
),
821 prefix
, yes_no(s
->guess_main_pid
),
822 prefix
, service_type_to_string(s
->type
),
823 prefix
, service_restart_to_string(s
->restart
),
824 prefix
, notify_access_to_string(s
->notify_access
),
825 prefix
, notify_state_to_string(s
->notify_state
),
826 prefix
, oom_policy_to_string(s
->oom_policy
));
828 if (s
->control_pid
> 0)
830 "%sControl PID: "PID_FMT
"\n",
831 prefix
, s
->control_pid
);
835 "%sMain PID: "PID_FMT
"\n"
836 "%sMain PID Known: %s\n"
837 "%sMain PID Alien: %s\n",
839 prefix
, yes_no(s
->main_pid_known
),
840 prefix
, yes_no(s
->main_pid_alien
));
845 prefix
, s
->pid_file
);
850 "%sBus Name Good: %s\n",
852 prefix
, yes_no(s
->bus_name_good
));
854 if (UNIT_ISSET(s
->accept_socket
))
856 "%sAccept Socket: %s\n",
857 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
861 "%sTimeoutStartSec: %s\n"
862 "%sTimeoutStopSec: %s\n"
863 "%sTimeoutStartFailureMode: %s\n"
864 "%sTimeoutStopFailureMode: %s\n",
865 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
866 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
867 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
868 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
869 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
871 if (s
->timeout_abort_set
)
873 "%sTimeoutAbortSec: %s\n",
874 prefix
, format_timespan(buf_abort
, sizeof(buf_abort
), s
->timeout_abort_usec
, USEC_PER_SEC
));
877 "%sRuntimeMaxSec: %s\n"
878 "%sWatchdogSec: %s\n",
879 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
880 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
882 kill_context_dump(&s
->kill_context
, f
, prefix
);
883 exec_context_dump(&s
->exec_context
, f
, prefix
);
885 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
887 if (!s
->exec_command
[c
])
890 fprintf(f
, "%s-> %s:\n",
891 prefix
, service_exec_command_to_string(c
));
893 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
897 fprintf(f
, "%sStatus Text: %s\n",
898 prefix
, s
->status_text
);
900 if (s
->n_fd_store_max
> 0)
902 "%sFile Descriptor Store Max: %u\n"
903 "%sFile Descriptor Store Current: %zu\n",
904 prefix
, s
->n_fd_store_max
,
905 prefix
, s
->n_fd_store
);
907 cgroup_context_dump(UNIT(s
), f
, prefix
);
910 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
914 assert(pid_is_valid(pid
));
916 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
917 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
920 if (pid
== getpid_cached() || pid
== 1) {
921 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
925 if (pid
== s
->control_pid
) {
926 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
930 if (!pid_is_alive(pid
)) {
931 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
935 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
936 if (owner
== UNIT(s
)) {
937 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
938 return 1; /* Yay, it's definitely a good PID */
941 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
944 static int service_load_pid_file(Service
*s
, bool may_warn
) {
945 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
946 bool questionable_pid_file
= false;
947 _cleanup_free_
char *k
= NULL
;
948 _cleanup_close_
int fd
= -1;
957 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
959 r
= chase_symlinks(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
961 log_unit_full(UNIT(s
), LOG_DEBUG
, r
,
962 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
964 questionable_pid_file
= true;
966 r
= chase_symlinks(s
->pid_file
, NULL
, 0, NULL
, &fd
);
969 return log_unit_full(UNIT(s
), prio
, fd
,
970 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
972 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
973 * chase_symlinks() returned us into a proper fd first. */
974 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
975 r
= read_one_line_file(procfs
, &k
);
977 return log_unit_error_errno(UNIT(s
), r
,
978 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
981 r
= parse_pid(k
, &pid
);
983 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
985 if (s
->main_pid_known
&& pid
== s
->main_pid
)
988 r
= service_is_suitable_main_pid(s
, pid
, prio
);
994 if (questionable_pid_file
) {
995 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
999 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1001 if (fstat(fd
, &st
) < 0)
1002 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1004 if (st
.st_uid
!= 0) {
1005 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
);
1009 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
);
1012 if (s
->main_pid_known
) {
1013 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1015 service_unwatch_main_pid(s
);
1016 s
->main_pid_known
= false;
1018 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1020 r
= service_set_main_pid(s
, pid
);
1024 r
= unit_watch_pid(UNIT(s
), pid
, false);
1025 if (r
< 0) /* FIXME: we need to do something here */
1026 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1031 static void service_search_main_pid(Service
*s
) {
1037 /* If we know it anyway, don't ever fallback to unreliable
1039 if (s
->main_pid_known
)
1042 if (!s
->guess_main_pid
)
1045 assert(s
->main_pid
<= 0);
1047 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1050 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1051 if (service_set_main_pid(s
, pid
) < 0)
1054 r
= unit_watch_pid(UNIT(s
), pid
, false);
1056 /* FIXME: we need to do something here */
1057 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1060 static void service_set_state(Service
*s
, ServiceState state
) {
1061 ServiceState old_state
;
1062 const UnitActiveState
*table
;
1066 if (s
->state
!= state
)
1067 bus_unit_send_pending_change_signal(UNIT(s
), false);
1069 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1071 old_state
= s
->state
;
1074 service_unwatch_pid_file(s
);
1077 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1080 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1081 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1082 SERVICE_AUTO_RESTART
,
1084 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1087 SERVICE_START
, SERVICE_START_POST
,
1088 SERVICE_RUNNING
, SERVICE_RELOAD
,
1089 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1090 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1091 service_unwatch_main_pid(s
);
1092 s
->main_command
= NULL
;
1096 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1098 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1099 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1100 SERVICE_CLEANING
)) {
1101 service_unwatch_control_pid(s
);
1102 s
->control_command
= NULL
;
1103 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1106 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1107 unit_unwatch_all_pids(UNIT(s
));
1108 unit_dequeue_rewatch_pids(UNIT(s
));
1112 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1113 SERVICE_RUNNING
, SERVICE_RELOAD
,
1114 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1115 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1116 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1117 service_close_socket_fd(s
);
1119 if (state
!= SERVICE_START
)
1120 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1122 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1123 service_stop_watchdog(s
);
1125 /* For the inactive states unit_notify() will trim the cgroup,
1126 * but for exit we have to do that ourselves... */
1127 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1128 unit_prune_cgroup(UNIT(s
));
1130 if (old_state
!= state
)
1131 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1133 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1134 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1135 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0) |
1136 (s
->result
== SERVICE_SKIP_CONDITION
? UNIT_NOTIFY_SKIP_CONDITION
: 0));
1139 static usec_t
service_coldplug_timeout(Service
*s
) {
1142 switch (s
->deserialized_state
) {
1144 case SERVICE_CONDITION
:
1145 case SERVICE_START_PRE
:
1147 case SERVICE_START_POST
:
1148 case SERVICE_RELOAD
:
1149 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1151 case SERVICE_RUNNING
:
1152 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1155 case SERVICE_STOP_SIGTERM
:
1156 case SERVICE_STOP_SIGKILL
:
1157 case SERVICE_STOP_POST
:
1158 case SERVICE_FINAL_SIGTERM
:
1159 case SERVICE_FINAL_SIGKILL
:
1160 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1162 case SERVICE_STOP_WATCHDOG
:
1163 case SERVICE_FINAL_WATCHDOG
:
1164 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1166 case SERVICE_AUTO_RESTART
:
1167 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1169 case SERVICE_CLEANING
:
1170 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1173 return USEC_INFINITY
;
1177 static int service_coldplug(Unit
*u
) {
1178 Service
*s
= SERVICE(u
);
1182 assert(s
->state
== SERVICE_DEAD
);
1184 if (s
->deserialized_state
== s
->state
)
1187 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1191 if (s
->main_pid
> 0 &&
1192 pid_is_unwaited(s
->main_pid
) &&
1193 (IN_SET(s
->deserialized_state
,
1194 SERVICE_START
, SERVICE_START_POST
,
1195 SERVICE_RUNNING
, SERVICE_RELOAD
,
1196 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1197 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1198 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1203 if (s
->control_pid
> 0 &&
1204 pid_is_unwaited(s
->control_pid
) &&
1205 IN_SET(s
->deserialized_state
,
1206 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1208 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1209 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1210 SERVICE_CLEANING
)) {
1211 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1216 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1217 (void) unit_enqueue_rewatch_pids(u
);
1218 (void) unit_setup_dynamic_creds(u
);
1219 (void) unit_setup_exec_runtime(u
);
1222 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1223 service_start_watchdog(s
);
1225 if (UNIT_ISSET(s
->accept_socket
)) {
1226 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1228 if (socket
->max_connections_per_source
> 0) {
1231 /* Make a best-effort attempt at bumping the connection count */
1232 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1233 socket_peer_unref(s
->peer
);
1239 service_set_state(s
, s
->deserialized_state
);
1243 static int service_collect_fds(
1247 size_t *n_socket_fds
,
1248 size_t *n_storage_fds
) {
1250 _cleanup_strv_free_
char **rfd_names
= NULL
;
1251 _cleanup_free_
int *rfds
= NULL
;
1252 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1258 assert(n_socket_fds
);
1259 assert(n_storage_fds
);
1261 if (s
->socket_fd
>= 0) {
1263 /* Pass the per-connection socket */
1268 rfds
[0] = s
->socket_fd
;
1270 rfd_names
= strv_new("connection");
1280 /* Pass all our configured sockets for singleton services */
1282 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1283 _cleanup_free_
int *cfds
= NULL
;
1287 if (u
->type
!= UNIT_SOCKET
)
1292 cn_fds
= socket_collect_fds(sock
, &cfds
);
1300 rfds
= TAKE_PTR(cfds
);
1301 rn_socket_fds
= cn_fds
;
1305 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1309 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1312 rn_socket_fds
+= cn_fds
;
1315 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1321 if (s
->n_fd_store
> 0) {
1327 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1333 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1338 n_fds
= rn_socket_fds
;
1340 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1341 rfds
[n_fds
] = fs
->fd
;
1342 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1343 if (!rfd_names
[n_fds
])
1350 rfd_names
[n_fds
] = NULL
;
1353 *fds
= TAKE_PTR(rfds
);
1354 *fd_names
= TAKE_PTR(rfd_names
);
1355 *n_socket_fds
= rn_socket_fds
;
1356 *n_storage_fds
= rn_storage_fds
;
1361 static int service_allocate_exec_fd_event_source(
1364 sd_event_source
**ret_event_source
) {
1366 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1371 assert(ret_event_source
);
1373 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1375 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1377 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1379 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1381 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1383 (void) sd_event_source_set_description(source
, "service event_fd");
1385 r
= sd_event_source_set_io_fd_own(source
, true);
1387 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1389 *ret_event_source
= TAKE_PTR(source
);
1393 static int service_allocate_exec_fd(
1395 sd_event_source
**ret_event_source
,
1398 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1402 assert(ret_event_source
);
1403 assert(ret_exec_fd
);
1405 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1406 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1408 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1413 *ret_exec_fd
= TAKE_FD(p
[1]);
1418 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1421 /* Notifications are accepted depending on the process and
1422 * the access setting of the service:
1423 * process: \ access: NONE MAIN EXEC ALL
1424 * main no yes yes yes
1425 * control no no yes yes
1426 * other (forked) no no no yes */
1428 if (flags
& EXEC_IS_CONTROL
)
1429 /* A control process */
1430 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1432 /* We only spawn main processes and control processes, so any
1433 * process that is not a control process is a main process */
1434 return s
->notify_access
!= NOTIFY_NONE
;
1437 static int service_spawn(
1444 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1451 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1452 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1461 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1465 if (flags
& EXEC_IS_CONTROL
) {
1466 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1467 if (s
->permissions_start_only
)
1468 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1469 if (s
->root_directory_start_only
)
1470 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1473 if ((flags
& EXEC_PASS_FDS
) ||
1474 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1475 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1476 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1478 r
= service_collect_fds(s
,
1480 &exec_params
.fd_names
,
1481 &exec_params
.n_socket_fds
,
1482 &exec_params
.n_storage_fds
);
1486 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1489 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1490 assert(!s
->exec_fd_event_source
);
1492 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1497 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1501 our_env
= new0(char*, 10);
1505 if (service_exec_needs_notify_socket(s
, flags
))
1506 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1509 if (s
->main_pid
> 0)
1510 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1513 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1514 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1518 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1521 if (s
->socket_fd
>= 0) {
1522 union sockaddr_union sa
;
1523 socklen_t salen
= sizeof(sa
);
1525 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1526 * useful. Note that we do this only when we are still connected at this point in time, which we might
1527 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1528 * in ENOTCONN), and just use whate we can use. */
1530 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1531 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1532 _cleanup_free_
char *addr
= NULL
;
1536 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1540 t
= strjoin("REMOTE_ADDR=", addr
);
1543 our_env
[n_env
++] = t
;
1545 r
= sockaddr_port(&sa
.sa
, &port
);
1549 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1551 our_env
[n_env
++] = t
;
1555 if (flags
& EXEC_SETENV_RESULT
) {
1556 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1559 if (s
->main_exec_status
.pid
> 0 &&
1560 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1561 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1564 if (s
->main_exec_status
.code
== CLD_EXITED
)
1565 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1567 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1573 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1577 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1581 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1582 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1583 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1585 strv_free_and_replace(exec_params
.environment
, final_env
);
1586 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1587 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1588 if (s
->type
== SERVICE_IDLE
)
1589 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1590 exec_params
.stdin_fd
= s
->stdin_fd
;
1591 exec_params
.stdout_fd
= s
->stdout_fd
;
1592 exec_params
.stderr_fd
= s
->stderr_fd
;
1594 r
= exec_spawn(UNIT(s
),
1604 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1605 s
->exec_fd_hot
= false;
1607 r
= unit_watch_pid(UNIT(s
), pid
, true);
1616 static int main_pid_good(Service
*s
) {
1619 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1621 /* If we know the pid file, then let's just check if it is
1623 if (s
->main_pid_known
) {
1625 /* If it's an alien child let's check if it is still
1627 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1628 return pid_is_alive(s
->main_pid
);
1630 /* .. otherwise assume we'll get a SIGCHLD for it,
1631 * which we really should wait for to collect exit
1632 * status and code */
1633 return s
->main_pid
> 0;
1636 /* We don't know the pid */
1640 static int control_pid_good(Service
*s
) {
1643 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1644 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1645 * means: we can't figure it out. */
1647 return s
->control_pid
> 0;
1650 static int cgroup_good(Service
*s
) {
1655 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1658 if (!UNIT(s
)->cgroup_path
)
1661 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1668 static bool service_shall_restart(Service
*s
, const char **reason
) {
1671 /* Don't restart after manual stops */
1672 if (s
->forbid_restart
) {
1673 *reason
= "manual stop";
1677 /* Never restart if this is configured as special exception */
1678 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1679 *reason
= "prevented by exit status";
1683 /* Restart if the exit code/status are configured as restart triggers */
1684 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1685 *reason
= "forced by exit status";
1689 *reason
= "restart setting";
1690 switch (s
->restart
) {
1692 case SERVICE_RESTART_NO
:
1695 case SERVICE_RESTART_ALWAYS
:
1698 case SERVICE_RESTART_ON_SUCCESS
:
1699 return s
->result
== SERVICE_SUCCESS
;
1701 case SERVICE_RESTART_ON_FAILURE
:
1702 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1704 case SERVICE_RESTART_ON_ABNORMAL
:
1705 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1707 case SERVICE_RESTART_ON_WATCHDOG
:
1708 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1710 case SERVICE_RESTART_ON_ABORT
:
1711 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1714 assert_not_reached("unknown restart setting");
1718 static bool service_will_restart(Unit
*u
) {
1719 Service
*s
= SERVICE(u
);
1723 if (s
->will_auto_restart
)
1725 if (s
->state
== SERVICE_AUTO_RESTART
)
1728 return unit_will_restart_default(u
);
1731 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1732 ServiceState end_state
;
1737 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1738 * undo what has already been enqueued. */
1739 if (unit_stop_pending(UNIT(s
)))
1740 allow_restart
= false;
1742 if (s
->result
== SERVICE_SUCCESS
)
1745 if (s
->result
== SERVICE_SUCCESS
) {
1746 unit_log_success(UNIT(s
));
1747 end_state
= SERVICE_DEAD
;
1748 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1749 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1750 end_state
= SERVICE_DEAD
;
1752 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1753 end_state
= SERVICE_FAILED
;
1755 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1758 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1763 shall_restart
= service_shall_restart(s
, &reason
);
1764 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1765 shall_restart
? "" : "not ",
1768 s
->will_auto_restart
= true;
1771 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1772 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1773 s
->n_keep_fd_store
++;
1775 service_set_state(s
, end_state
);
1777 if (s
->will_auto_restart
) {
1778 s
->will_auto_restart
= false;
1780 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1782 s
->n_keep_fd_store
--;
1786 service_set_state(s
, SERVICE_AUTO_RESTART
);
1788 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1789 * user can still introspect the counter. Do so on the next start. */
1790 s
->flush_n_restarts
= true;
1792 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1793 * queue, so that the fd store is possibly gc'ed again */
1794 s
->n_keep_fd_store
--;
1795 unit_add_to_gc_queue(UNIT(s
));
1797 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1798 s
->forbid_restart
= false;
1800 /* We want fresh tmpdirs in case service is started again immediately */
1801 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1803 /* Also, remove the runtime directory */
1804 unit_destroy_runtime_directory(UNIT(s
), &s
->exec_context
);
1806 /* Get rid of the IPC bits of the user */
1807 unit_unref_uid_gid(UNIT(s
), true);
1809 /* Release the user, and destroy it if we are the only remaining owner */
1810 dynamic_creds_destroy(&s
->dynamic_creds
);
1812 /* Try to delete the pid file. At this point it will be
1813 * out-of-date, and some software might be confused by it, so
1814 * let's remove it. */
1816 (void) unlink(s
->pid_file
);
1818 /* Reset TTY ownership if necessary */
1819 exec_context_revert_tty(&s
->exec_context
);
1824 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1825 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1828 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1832 if (s
->result
== SERVICE_SUCCESS
)
1835 service_unwatch_control_pid(s
);
1836 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1838 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1839 if (s
->control_command
) {
1840 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1842 r
= service_spawn(s
,
1844 s
->timeout_stop_usec
,
1845 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1850 service_set_state(s
, SERVICE_STOP_POST
);
1852 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1857 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1858 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1861 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1864 case SERVICE_STOP_WATCHDOG
:
1865 case SERVICE_FINAL_WATCHDOG
:
1866 return KILL_WATCHDOG
;
1868 case SERVICE_STOP_SIGTERM
:
1869 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1870 return KILL_RESTART
;
1873 case SERVICE_FINAL_SIGTERM
:
1874 return KILL_TERMINATE
;
1876 case SERVICE_STOP_SIGKILL
:
1877 case SERVICE_FINAL_SIGKILL
:
1881 return _KILL_OPERATION_INVALID
;
1885 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1886 int kill_operation
, r
;
1890 if (s
->result
== SERVICE_SUCCESS
)
1893 /* Before sending any signal, make sure we track all members of this cgroup */
1894 (void) unit_watch_all_pids(UNIT(s
));
1896 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1898 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1900 kill_operation
= state_to_kill_operation(s
, state
);
1901 r
= unit_kill_context(
1912 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1913 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1917 service_set_state(s
, state
);
1918 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1919 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1920 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1921 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1922 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
1923 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1925 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1930 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1932 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1933 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1935 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1938 static void service_enter_stop_by_notify(Service
*s
) {
1941 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1943 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1945 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1946 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1949 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1954 if (s
->result
== SERVICE_SUCCESS
)
1957 service_unwatch_control_pid(s
);
1958 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1960 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1961 if (s
->control_command
) {
1962 s
->control_command_id
= SERVICE_EXEC_STOP
;
1964 r
= service_spawn(s
,
1966 s
->timeout_stop_usec
,
1967 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1972 service_set_state(s
, SERVICE_STOP
);
1974 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1979 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1980 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1983 static bool service_good(Service
*s
) {
1987 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1990 main_pid_ok
= main_pid_good(s
);
1991 if (main_pid_ok
> 0) /* It's alive */
1993 if (main_pid_ok
== 0) /* It's dead */
1996 /* OK, we don't know anything about the main PID, maybe
1997 * because there is none. Let's check the control group
2000 return cgroup_good(s
) != 0;
2003 static void service_enter_running(Service
*s
, ServiceResult f
) {
2006 if (s
->result
== SERVICE_SUCCESS
)
2009 service_unwatch_control_pid(s
);
2011 if (s
->result
!= SERVICE_SUCCESS
)
2012 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2013 else if (service_good(s
)) {
2015 /* If there are any queued up sd_notify() notifications, process them now */
2016 if (s
->notify_state
== NOTIFY_RELOADING
)
2017 service_enter_reload_by_notify(s
);
2018 else if (s
->notify_state
== NOTIFY_STOPPING
)
2019 service_enter_stop_by_notify(s
);
2021 service_set_state(s
, SERVICE_RUNNING
);
2022 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2025 } else if (s
->remain_after_exit
)
2026 service_set_state(s
, SERVICE_EXITED
);
2028 service_enter_stop(s
, SERVICE_SUCCESS
);
2031 static void service_enter_start_post(Service
*s
) {
2035 service_unwatch_control_pid(s
);
2036 service_reset_watchdog(s
);
2038 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2039 if (s
->control_command
) {
2040 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2042 r
= service_spawn(s
,
2044 s
->timeout_start_usec
,
2045 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2050 service_set_state(s
, SERVICE_START_POST
);
2052 service_enter_running(s
, SERVICE_SUCCESS
);
2057 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2058 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2061 static void service_kill_control_process(Service
*s
) {
2066 if (s
->control_pid
<= 0)
2069 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2071 _cleanup_free_
char *comm
= NULL
;
2073 (void) get_process_comm(s
->control_pid
, &comm
);
2075 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2076 s
->control_pid
, strna(comm
));
2080 static int service_adverse_to_leftover_processes(Service
*s
) {
2083 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2084 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2085 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2086 * time is quite variable (so Timeout settings aren't of use).
2088 * Here we take these two factors and refuse to start a service if there are existing processes
2089 * within a control group. Databases, while generally having some protection against multiple
2090 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2091 * aren't as rigoriously written to protect aganst against multiple use. */
2093 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2094 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2095 !s
->kill_context
.send_sigkill
)
2096 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2097 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2102 static void service_enter_start(Service
*s
) {
2110 service_unwatch_control_pid(s
);
2111 service_unwatch_main_pid(s
);
2113 r
= service_adverse_to_leftover_processes(s
);
2117 if (s
->type
== SERVICE_FORKING
) {
2118 s
->control_command_id
= SERVICE_EXEC_START
;
2119 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2121 s
->main_command
= NULL
;
2123 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2124 s
->control_command
= NULL
;
2126 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2130 if (s
->type
!= SERVICE_ONESHOT
) {
2131 /* There's no command line configured for the main command? Hmm, that is strange.
2132 * This can only happen if the configuration changes at runtime. In this case,
2133 * let's enter a failure state. */
2134 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2139 /* We force a fake state transition here. Otherwise, the unit would go directly from
2140 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2141 * in between. This way we can later trigger actions that depend on the state
2142 * transition, including SuccessAction=. */
2143 service_set_state(s
, SERVICE_START
);
2145 service_enter_start_post(s
);
2149 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2150 /* For simple + idle this is the main process. We don't apply any timeout here, but
2151 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2152 timeout
= USEC_INFINITY
;
2154 timeout
= s
->timeout_start_usec
;
2156 r
= service_spawn(s
,
2159 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2164 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2165 /* For simple services we immediately start
2166 * the START_POST binaries. */
2168 service_set_main_pid(s
, pid
);
2169 service_enter_start_post(s
);
2171 } else if (s
->type
== SERVICE_FORKING
) {
2173 /* For forking services we wait until the start
2174 * process exited. */
2176 s
->control_pid
= pid
;
2177 service_set_state(s
, SERVICE_START
);
2179 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2181 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2183 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2184 * bus. 'notify' and 'exec' services are similar. */
2186 service_set_main_pid(s
, pid
);
2187 service_set_state(s
, SERVICE_START
);
2189 assert_not_reached("Unknown service type");
2194 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2195 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2198 static void service_enter_start_pre(Service
*s
) {
2203 service_unwatch_control_pid(s
);
2205 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2206 if (s
->control_command
) {
2208 r
= service_adverse_to_leftover_processes(s
);
2212 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2214 r
= service_spawn(s
,
2216 s
->timeout_start_usec
,
2217 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2222 service_set_state(s
, SERVICE_START_PRE
);
2224 service_enter_start(s
);
2229 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2230 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2233 static void service_enter_condition(Service
*s
) {
2238 service_unwatch_control_pid(s
);
2240 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2241 if (s
->control_command
) {
2243 r
= service_adverse_to_leftover_processes(s
);
2247 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2249 r
= service_spawn(s
,
2251 s
->timeout_start_usec
,
2252 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2258 service_set_state(s
, SERVICE_CONDITION
);
2260 service_enter_start_pre(s
);
2265 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2266 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2269 static void service_enter_restart(Service
*s
) {
2270 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2275 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2276 /* Don't restart things if we are going down anyway */
2277 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2279 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2286 /* Any units that are bound to this service must also be
2287 * restarted. We use JOB_RESTART (instead of the more obvious
2288 * JOB_START) here so that those dependency jobs will be added
2290 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2294 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2295 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2296 * explicitly however via the usual "systemctl reset-failure" logic. */
2298 s
->flush_n_restarts
= false;
2300 log_struct(LOG_INFO
,
2301 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2302 LOG_UNIT_ID(UNIT(s
)),
2303 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2304 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2305 "N_RESTARTS=%u", s
->n_restarts
);
2307 /* Notify clients about changed restart counter */
2308 unit_add_to_dbus_queue(UNIT(s
));
2310 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2311 * it will be canceled as part of the service_stop() call that
2312 * is executed as part of JOB_RESTART. */
2317 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2318 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2321 static void service_enter_reload_by_notify(Service
*s
) {
2322 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2327 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2328 service_set_state(s
, SERVICE_RELOAD
);
2330 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2331 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2333 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2336 static void service_enter_reload(Service
*s
) {
2341 service_unwatch_control_pid(s
);
2342 s
->reload_result
= SERVICE_SUCCESS
;
2344 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2345 if (s
->control_command
) {
2346 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2348 r
= service_spawn(s
,
2350 s
->timeout_start_usec
,
2351 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2356 service_set_state(s
, SERVICE_RELOAD
);
2358 service_enter_running(s
, SERVICE_SUCCESS
);
2363 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2364 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2365 service_enter_running(s
, SERVICE_SUCCESS
);
2368 static void service_run_next_control(Service
*s
) {
2373 assert(s
->control_command
);
2374 assert(s
->control_command
->command_next
);
2376 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2378 s
->control_command
= s
->control_command
->command_next
;
2379 service_unwatch_control_pid(s
);
2381 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2382 timeout
= s
->timeout_start_usec
;
2384 timeout
= s
->timeout_stop_usec
;
2386 r
= service_spawn(s
,
2389 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2390 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2391 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2392 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2400 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2402 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2403 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2404 else if (s
->state
== SERVICE_STOP_POST
)
2405 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2406 else if (s
->state
== SERVICE_RELOAD
) {
2407 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2408 service_enter_running(s
, SERVICE_SUCCESS
);
2410 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2413 static void service_run_next_main(Service
*s
) {
2418 assert(s
->main_command
);
2419 assert(s
->main_command
->command_next
);
2420 assert(s
->type
== SERVICE_ONESHOT
);
2422 s
->main_command
= s
->main_command
->command_next
;
2423 service_unwatch_main_pid(s
);
2425 r
= service_spawn(s
,
2427 s
->timeout_start_usec
,
2428 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2433 service_set_main_pid(s
, pid
);
2438 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2439 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2442 static int service_start(Unit
*u
) {
2443 Service
*s
= SERVICE(u
);
2448 /* We cannot fulfill this request right now, try again later
2450 if (IN_SET(s
->state
,
2451 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2452 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2455 /* Already on it! */
2456 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2459 /* A service that will be restarted must be stopped first to
2460 * trigger BindsTo and/or OnFailure dependencies. If a user
2461 * does not want to wait for the holdoff time to elapse, the
2462 * service should be manually restarted, not started. We
2463 * simply return EAGAIN here, so that any start jobs stay
2464 * queued, and assume that the auto restart timer will
2465 * eventually trigger the restart. */
2466 if (s
->state
== SERVICE_AUTO_RESTART
)
2469 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2471 /* Make sure we don't enter a busy loop of some kind. */
2472 r
= unit_test_start_limit(u
);
2474 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2478 r
= unit_acquire_invocation_id(u
);
2482 s
->result
= SERVICE_SUCCESS
;
2483 s
->reload_result
= SERVICE_SUCCESS
;
2484 s
->main_pid_known
= false;
2485 s
->main_pid_alien
= false;
2486 s
->forbid_restart
= false;
2488 s
->status_text
= mfree(s
->status_text
);
2489 s
->status_errno
= 0;
2491 s
->notify_state
= NOTIFY_UNKNOWN
;
2493 s
->watchdog_original_usec
= s
->watchdog_usec
;
2494 s
->watchdog_override_enable
= false;
2495 s
->watchdog_override_usec
= USEC_INFINITY
;
2497 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2498 exec_status_reset(&s
->main_exec_status
);
2500 /* This is not an automatic restart? Flush the restart counter then */
2501 if (s
->flush_n_restarts
) {
2503 s
->flush_n_restarts
= false;
2506 u
->reset_accounting
= true;
2508 service_enter_condition(s
);
2512 static int service_stop(Unit
*u
) {
2513 Service
*s
= SERVICE(u
);
2517 /* Don't create restart jobs from manual stops. */
2518 s
->forbid_restart
= true;
2521 if (IN_SET(s
->state
,
2522 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2523 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2526 /* A restart will be scheduled or is in progress. */
2527 if (s
->state
== SERVICE_AUTO_RESTART
) {
2528 service_set_state(s
, SERVICE_DEAD
);
2532 /* If there's already something running we go directly into
2534 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2535 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2539 /* If we are currently cleaning, then abort it, brutally. */
2540 if (s
->state
== SERVICE_CLEANING
) {
2541 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2545 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2547 service_enter_stop(s
, SERVICE_SUCCESS
);
2551 static int service_reload(Unit
*u
) {
2552 Service
*s
= SERVICE(u
);
2556 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2558 service_enter_reload(s
);
2562 _pure_
static bool service_can_reload(Unit
*u
) {
2563 Service
*s
= SERVICE(u
);
2567 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2570 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2571 Service
*s
= SERVICE(u
);
2573 ExecCommand
*first
, *c
;
2577 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2579 first
= s
->exec_command
[id
];
2581 /* Figure out where we are in the list by walking back to the beginning */
2582 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2588 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2589 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2590 size_t allocated
= 0, length
= 0;
2591 Service
*s
= SERVICE(u
);
2592 const char *type
, *key
;
2593 ServiceExecCommand id
;
2603 if (command
== s
->control_command
) {
2605 id
= s
->control_command_id
;
2608 id
= SERVICE_EXEC_START
;
2611 idx
= service_exec_command_index(u
, id
, command
);
2613 STRV_FOREACH(arg
, command
->argv
) {
2614 _cleanup_free_
char *e
= NULL
;
2622 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2626 args
[length
++] = ' ';
2628 args
[length
++] = '"';
2629 memcpy(args
+ length
, e
, n
);
2631 args
[length
++] = '"';
2634 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2639 p
= cescape(command
->path
);
2643 key
= strjoina(type
, "-command");
2644 (void) serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2649 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2650 Service
*s
= SERVICE(u
);
2658 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2659 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2660 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2662 if (s
->control_pid
> 0)
2663 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2665 if (s
->main_pid_known
&& s
->main_pid
> 0)
2666 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2668 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2669 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2670 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2672 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2673 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2675 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2679 service_serialize_exec_command(u
, f
, s
->control_command
);
2680 service_serialize_exec_command(u
, f
, s
->main_command
);
2682 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2685 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2688 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2692 if (s
->exec_fd_event_source
) {
2693 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2697 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2700 if (UNIT_ISSET(s
->accept_socket
)) {
2701 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2706 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2710 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2711 _cleanup_free_
char *c
= NULL
;
2714 copy
= fdset_put_dup(fds
, fs
->fd
);
2716 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2718 c
= cescape(fs
->fdname
);
2722 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2725 if (s
->main_exec_status
.pid
> 0) {
2726 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2727 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2728 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2730 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2731 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2732 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2736 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2737 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2739 if (s
->watchdog_override_enable
)
2740 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2742 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2743 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2748 static int service_deserialize_exec_command(
2751 const char *value
) {
2753 Service
*s
= SERVICE(u
);
2755 unsigned idx
= 0, i
;
2756 bool control
, found
= false;
2757 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2758 ExecCommand
*command
= NULL
;
2759 _cleanup_free_
char *path
= NULL
;
2760 _cleanup_strv_free_
char **argv
= NULL
;
2762 enum ExecCommandState
{
2763 STATE_EXEC_COMMAND_TYPE
,
2764 STATE_EXEC_COMMAND_INDEX
,
2765 STATE_EXEC_COMMAND_PATH
,
2766 STATE_EXEC_COMMAND_ARGS
,
2767 _STATE_EXEC_COMMAND_MAX
,
2768 _STATE_EXEC_COMMAND_INVALID
= -1,
2775 control
= streq(key
, "control-command");
2777 state
= STATE_EXEC_COMMAND_TYPE
;
2780 _cleanup_free_
char *arg
= NULL
;
2782 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2789 case STATE_EXEC_COMMAND_TYPE
:
2790 id
= service_exec_command_from_string(arg
);
2794 state
= STATE_EXEC_COMMAND_INDEX
;
2796 case STATE_EXEC_COMMAND_INDEX
:
2797 r
= safe_atou(arg
, &idx
);
2801 state
= STATE_EXEC_COMMAND_PATH
;
2803 case STATE_EXEC_COMMAND_PATH
:
2804 path
= TAKE_PTR(arg
);
2805 state
= STATE_EXEC_COMMAND_ARGS
;
2807 if (!path_is_absolute(path
))
2810 case STATE_EXEC_COMMAND_ARGS
:
2811 r
= strv_extend(&argv
, arg
);
2816 assert_not_reached("Unknown error at deserialization of exec command");
2821 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2824 /* Let's check whether exec command on given offset matches data that we just deserialized */
2825 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2829 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2834 /* Command at the index we serialized is different, let's look for command that exactly
2835 * matches but is on different index. If there is no such command we will not resume execution. */
2836 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2837 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2841 if (command
&& control
) {
2842 s
->control_command
= command
;
2843 s
->control_command_id
= id
;
2845 s
->main_command
= command
;
2847 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2852 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2853 Service
*s
= SERVICE(u
);
2861 if (streq(key
, "state")) {
2864 state
= service_state_from_string(value
);
2866 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2868 s
->deserialized_state
= state
;
2869 } else if (streq(key
, "result")) {
2872 f
= service_result_from_string(value
);
2874 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2875 else if (f
!= SERVICE_SUCCESS
)
2878 } else if (streq(key
, "reload-result")) {
2881 f
= service_result_from_string(value
);
2883 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2884 else if (f
!= SERVICE_SUCCESS
)
2885 s
->reload_result
= f
;
2887 } else if (streq(key
, "control-pid")) {
2890 if (parse_pid(value
, &pid
) < 0)
2891 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2893 s
->control_pid
= pid
;
2894 } else if (streq(key
, "main-pid")) {
2897 if (parse_pid(value
, &pid
) < 0)
2898 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2900 (void) service_set_main_pid(s
, pid
);
2901 } else if (streq(key
, "main-pid-known")) {
2904 b
= parse_boolean(value
);
2906 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2908 s
->main_pid_known
= b
;
2909 } else if (streq(key
, "bus-name-good")) {
2912 b
= parse_boolean(value
);
2914 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2916 s
->bus_name_good
= b
;
2917 } else if (streq(key
, "bus-name-owner")) {
2918 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2920 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2921 } else if (streq(key
, "status-text")) {
2924 r
= cunescape(value
, 0, &t
);
2926 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2928 free_and_replace(s
->status_text
, t
);
2930 } else if (streq(key
, "accept-socket")) {
2933 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2935 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2937 unit_ref_set(&s
->accept_socket
, u
, socket
);
2938 SOCKET(socket
)->n_connections
++;
2941 } else if (streq(key
, "socket-fd")) {
2944 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2945 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2947 asynchronous_close(s
->socket_fd
);
2948 s
->socket_fd
= fdset_remove(fds
, fd
);
2950 } else if (streq(key
, "fd-store-fd")) {
2951 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
2955 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2956 if (r
<= 0 || safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
)) {
2957 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2961 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2963 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2967 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
2969 /* If the value is not present, we assume the default */
2971 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
2972 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2976 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
2978 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2980 fdset_remove(fds
, fd
);
2981 } else if (streq(key
, "main-exec-status-pid")) {
2984 if (parse_pid(value
, &pid
) < 0)
2985 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2987 s
->main_exec_status
.pid
= pid
;
2988 } else if (streq(key
, "main-exec-status-code")) {
2991 if (safe_atoi(value
, &i
) < 0)
2992 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2994 s
->main_exec_status
.code
= i
;
2995 } else if (streq(key
, "main-exec-status-status")) {
2998 if (safe_atoi(value
, &i
) < 0)
2999 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3001 s
->main_exec_status
.status
= i
;
3002 } else if (streq(key
, "main-exec-status-start"))
3003 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3004 else if (streq(key
, "main-exec-status-exit"))
3005 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3006 else if (streq(key
, "watchdog-timestamp"))
3007 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3008 else if (streq(key
, "forbid-restart")) {
3011 b
= parse_boolean(value
);
3013 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3015 s
->forbid_restart
= b
;
3016 } else if (streq(key
, "stdin-fd")) {
3019 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3020 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3022 asynchronous_close(s
->stdin_fd
);
3023 s
->stdin_fd
= fdset_remove(fds
, fd
);
3024 s
->exec_context
.stdio_as_fds
= true;
3026 } else if (streq(key
, "stdout-fd")) {
3029 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3030 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3032 asynchronous_close(s
->stdout_fd
);
3033 s
->stdout_fd
= fdset_remove(fds
, fd
);
3034 s
->exec_context
.stdio_as_fds
= true;
3036 } else if (streq(key
, "stderr-fd")) {
3039 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3040 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3042 asynchronous_close(s
->stderr_fd
);
3043 s
->stderr_fd
= fdset_remove(fds
, fd
);
3044 s
->exec_context
.stdio_as_fds
= true;
3046 } else if (streq(key
, "exec-fd")) {
3049 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3050 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3052 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3054 fd
= fdset_remove(fds
, fd
);
3055 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3058 } else if (streq(key
, "watchdog-override-usec")) {
3059 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3060 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3062 s
->watchdog_override_enable
= true;
3064 } else if (streq(key
, "watchdog-original-usec")) {
3065 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3066 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3068 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3069 r
= service_deserialize_exec_command(u
, key
, value
);
3071 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3073 } else if (streq(key
, "n-restarts")) {
3074 r
= safe_atou(value
, &s
->n_restarts
);
3076 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3078 } else if (streq(key
, "flush-n-restarts")) {
3079 r
= parse_boolean(value
);
3081 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3083 s
->flush_n_restarts
= r
;
3085 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3090 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3091 const UnitActiveState
*table
;
3095 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3097 return table
[SERVICE(u
)->state
];
3100 static const char *service_sub_state_to_string(Unit
*u
) {
3103 return service_state_to_string(SERVICE(u
)->state
);
3106 static bool service_may_gc(Unit
*u
) {
3107 Service
*s
= SERVICE(u
);
3111 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3112 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3113 * have moved outside of the cgroup. */
3115 if (main_pid_good(s
) > 0 ||
3116 control_pid_good(s
) > 0)
3122 static int service_retry_pid_file(Service
*s
) {
3125 assert(s
->pid_file
);
3126 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3128 r
= service_load_pid_file(s
, false);
3132 service_unwatch_pid_file(s
);
3134 service_enter_running(s
, SERVICE_SUCCESS
);
3138 static int service_watch_pid_file(Service
*s
) {
3141 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3143 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3147 /* the pidfile might have appeared just before we set the watch */
3148 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3149 service_retry_pid_file(s
);
3153 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3154 service_unwatch_pid_file(s
);
3158 static int service_demand_pid_file(Service
*s
) {
3161 assert(s
->pid_file
);
3162 assert(!s
->pid_file_pathspec
);
3164 ps
= new0(PathSpec
, 1);
3169 ps
->path
= strdup(s
->pid_file
);
3175 path_simplify(ps
->path
, false);
3177 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3178 * keep their PID file open all the time. */
3179 ps
->type
= PATH_MODIFIED
;
3180 ps
->inotify_fd
= -1;
3182 s
->pid_file_pathspec
= ps
;
3184 return service_watch_pid_file(s
);
3187 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3188 PathSpec
*p
= userdata
;
3193 s
= SERVICE(p
->unit
);
3197 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3198 assert(s
->pid_file_pathspec
);
3199 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3201 log_unit_debug(UNIT(s
), "inotify event");
3203 if (path_spec_fd_event(p
, events
) < 0)
3206 if (service_retry_pid_file(s
) == 0)
3209 if (service_watch_pid_file(s
) < 0)
3215 service_unwatch_pid_file(s
);
3216 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3220 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3221 Service
*s
= SERVICE(userdata
);
3225 log_unit_debug(UNIT(s
), "got exec-fd event");
3227 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3228 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3229 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3230 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3231 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3232 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3233 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3234 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3240 n
= read(fd
, &x
, sizeof(x
));
3242 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3245 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3247 if (n
== 0) { /* EOF → the event we are waiting for */
3249 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3251 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3252 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3254 s
->exec_fd_hot
= false;
3256 /* Nice! This is what we have been waiting for. Transition to next state. */
3257 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3258 service_enter_start_post(s
);
3260 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3265 /* A byte was read → this turns on/off the exec fd logic */
3266 assert(n
== sizeof(x
));
3273 static void service_notify_cgroup_empty_event(Unit
*u
) {
3274 Service
*s
= SERVICE(u
);
3278 log_unit_debug(u
, "Control group is empty.");
3282 /* Waiting for SIGCHLD is usually more interesting,
3283 * because it includes return codes/signals. Which is
3284 * why we ignore the cgroup events for most cases,
3285 * except when we don't know pid which to expect the
3289 if (s
->type
== SERVICE_NOTIFY
&&
3290 main_pid_good(s
) == 0 &&
3291 control_pid_good(s
) == 0) {
3292 /* No chance of getting a ready notification anymore */
3293 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3298 case SERVICE_START_POST
:
3299 if (s
->pid_file_pathspec
&&
3300 main_pid_good(s
) == 0 &&
3301 control_pid_good(s
) == 0) {
3303 /* Give up hoping for the daemon to write its PID file */
3304 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3306 service_unwatch_pid_file(s
);
3307 if (s
->state
== SERVICE_START
)
3308 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3310 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3314 case SERVICE_RUNNING
:
3315 /* service_enter_running() will figure out what to do */
3316 service_enter_running(s
, SERVICE_SUCCESS
);
3319 case SERVICE_STOP_WATCHDOG
:
3320 case SERVICE_STOP_SIGTERM
:
3321 case SERVICE_STOP_SIGKILL
:
3323 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3324 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3328 case SERVICE_STOP_POST
:
3329 case SERVICE_FINAL_WATCHDOG
:
3330 case SERVICE_FINAL_SIGTERM
:
3331 case SERVICE_FINAL_SIGKILL
:
3332 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3333 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3342 static void service_notify_cgroup_oom_event(Unit
*u
) {
3343 Service
*s
= SERVICE(u
);
3345 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3347 if (s
->oom_policy
== OOM_CONTINUE
)
3352 case SERVICE_CONDITION
:
3353 case SERVICE_START_PRE
:
3355 case SERVICE_START_POST
:
3357 if (s
->oom_policy
== OOM_STOP
)
3358 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3359 else if (s
->oom_policy
== OOM_KILL
)
3360 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3364 case SERVICE_EXITED
:
3365 case SERVICE_RUNNING
:
3366 if (s
->oom_policy
== OOM_STOP
)
3367 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3368 else if (s
->oom_policy
== OOM_KILL
)
3369 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3373 case SERVICE_STOP_WATCHDOG
:
3374 case SERVICE_STOP_SIGTERM
:
3375 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3378 case SERVICE_STOP_SIGKILL
:
3379 case SERVICE_FINAL_SIGKILL
:
3380 if (s
->result
== SERVICE_SUCCESS
)
3381 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3384 case SERVICE_STOP_POST
:
3385 case SERVICE_FINAL_SIGTERM
:
3386 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3394 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3395 bool notify_dbus
= true;
3396 Service
*s
= SERVICE(u
);
3398 ExitClean clean_mode
;
3403 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3404 * considered daemons as they are typically not long running. */
3405 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3406 clean_mode
= EXIT_CLEAN_COMMAND
;
3408 clean_mode
= EXIT_CLEAN_DAEMON
;
3410 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3411 f
= SERVICE_SUCCESS
;
3412 else if (code
== CLD_EXITED
)
3413 f
= SERVICE_FAILURE_EXIT_CODE
;
3414 else if (code
== CLD_KILLED
)
3415 f
= SERVICE_FAILURE_SIGNAL
;
3416 else if (code
== CLD_DUMPED
)
3417 f
= SERVICE_FAILURE_CORE_DUMP
;
3419 assert_not_reached("Unknown code");
3421 if (s
->main_pid
== pid
) {
3422 /* Forking services may occasionally move to a new PID.
3423 * As long as they update the PID file before exiting the old
3424 * PID, they're fine. */
3425 if (service_load_pid_file(s
, false) > 0)
3429 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3431 if (s
->main_command
) {
3432 /* If this is not a forking service than the
3433 * main process got started and hence we copy
3434 * the exit status so that it is recorded both
3435 * as main and as control process exit
3438 s
->main_command
->exec_status
= s
->main_exec_status
;
3440 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3441 f
= SERVICE_SUCCESS
;
3442 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3444 /* If this is a forked process, then we should
3445 * ignore the return value if this was
3446 * configured for the starter process */
3448 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3449 f
= SERVICE_SUCCESS
;
3452 unit_log_process_exit(
3455 service_exec_command_to_string(SERVICE_EXEC_START
),
3456 f
== SERVICE_SUCCESS
,
3459 if (s
->result
== SERVICE_SUCCESS
)
3462 if (s
->main_command
&&
3463 s
->main_command
->command_next
&&
3464 s
->type
== SERVICE_ONESHOT
&&
3465 f
== SERVICE_SUCCESS
) {
3467 /* There is another command to *
3468 * execute, so let's do that. */
3470 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3471 service_run_next_main(s
);
3475 /* The service exited, so the service is officially
3477 s
->main_command
= NULL
;
3481 case SERVICE_START_POST
:
3482 case SERVICE_RELOAD
:
3484 /* Need to wait until the operation is
3489 if (s
->type
== SERVICE_ONESHOT
) {
3490 /* This was our main goal, so let's go on */
3491 if (f
== SERVICE_SUCCESS
)
3492 service_enter_start_post(s
);
3494 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3496 } else if (s
->type
== SERVICE_NOTIFY
) {
3497 /* Only enter running through a notification, so that the
3498 * SERVICE_START state signifies that no ready notification
3499 * has been received */
3500 if (f
!= SERVICE_SUCCESS
)
3501 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3502 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3503 /* The service has never been and will never be active */
3504 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3509 case SERVICE_RUNNING
:
3510 service_enter_running(s
, f
);
3513 case SERVICE_STOP_WATCHDOG
:
3514 case SERVICE_STOP_SIGTERM
:
3515 case SERVICE_STOP_SIGKILL
:
3517 if (control_pid_good(s
) <= 0)
3518 service_enter_stop_post(s
, f
);
3520 /* If there is still a control process, wait for that first */
3523 case SERVICE_STOP_POST
:
3525 if (control_pid_good(s
) <= 0)
3526 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3530 case SERVICE_FINAL_WATCHDOG
:
3531 case SERVICE_FINAL_SIGTERM
:
3532 case SERVICE_FINAL_SIGKILL
:
3534 if (control_pid_good(s
) <= 0)
3535 service_enter_dead(s
, f
, true);
3539 assert_not_reached("Uh, main process died at wrong time.");
3543 } else if (s
->control_pid
== pid
) {
3546 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3547 if (f
== SERVICE_FAILURE_EXIT_CODE
&& s
->state
== SERVICE_CONDITION
&& status
< 255)
3548 f
= SERVICE_SKIP_CONDITION
;
3550 if (s
->control_command
) {
3551 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3553 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3554 f
= SERVICE_SUCCESS
;
3557 unit_log_process_exit(
3560 service_exec_command_to_string(s
->control_command_id
),
3561 f
== SERVICE_SUCCESS
,
3564 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3567 if (s
->control_command
&&
3568 s
->control_command
->command_next
&&
3569 f
== SERVICE_SUCCESS
) {
3571 /* There is another command to *
3572 * execute, so let's do that. */
3574 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3575 service_run_next_control(s
);
3578 /* No further commands for this step, so let's
3579 * figure out what to do next */
3581 s
->control_command
= NULL
;
3582 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3584 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3588 case SERVICE_CONDITION
:
3589 if (f
== SERVICE_SUCCESS
)
3590 service_enter_start_pre(s
);
3592 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3595 case SERVICE_START_PRE
:
3596 if (f
== SERVICE_SUCCESS
)
3597 service_enter_start(s
);
3599 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3603 if (s
->type
!= SERVICE_FORKING
)
3604 /* Maybe spurious event due to a reload that changed the type? */
3607 if (f
!= SERVICE_SUCCESS
) {
3608 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3613 bool has_start_post
;
3616 /* Let's try to load the pid file here if we can.
3617 * The PID file might actually be created by a START_POST
3618 * script. In that case don't worry if the loading fails. */
3620 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3621 r
= service_load_pid_file(s
, !has_start_post
);
3622 if (!has_start_post
&& r
< 0) {
3623 r
= service_demand_pid_file(s
);
3624 if (r
< 0 || cgroup_good(s
) == 0)
3625 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3629 service_search_main_pid(s
);
3631 service_enter_start_post(s
);
3634 case SERVICE_START_POST
:
3635 if (f
!= SERVICE_SUCCESS
) {
3636 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3643 r
= service_load_pid_file(s
, true);
3645 r
= service_demand_pid_file(s
);
3646 if (r
< 0 || cgroup_good(s
) == 0)
3647 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3651 service_search_main_pid(s
);
3653 service_enter_running(s
, SERVICE_SUCCESS
);
3656 case SERVICE_RELOAD
:
3657 if (f
== SERVICE_SUCCESS
)
3658 if (service_load_pid_file(s
, true) < 0)
3659 service_search_main_pid(s
);
3661 s
->reload_result
= f
;
3662 service_enter_running(s
, SERVICE_SUCCESS
);
3666 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3669 case SERVICE_STOP_WATCHDOG
:
3670 case SERVICE_STOP_SIGTERM
:
3671 case SERVICE_STOP_SIGKILL
:
3672 if (main_pid_good(s
) <= 0)
3673 service_enter_stop_post(s
, f
);
3675 /* If there is still a service process around, wait until
3676 * that one quit, too */
3679 case SERVICE_STOP_POST
:
3680 if (main_pid_good(s
) <= 0)
3681 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3684 case SERVICE_FINAL_WATCHDOG
:
3685 case SERVICE_FINAL_SIGTERM
:
3686 case SERVICE_FINAL_SIGKILL
:
3687 if (main_pid_good(s
) <= 0)
3688 service_enter_dead(s
, f
, true);
3691 case SERVICE_CLEANING
:
3693 if (s
->clean_result
== SERVICE_SUCCESS
)
3694 s
->clean_result
= f
;
3696 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3700 assert_not_reached("Uh, control process died at wrong time.");
3703 } else /* Neither control nor main PID? If so, don't notify about anything */
3704 notify_dbus
= false;
3706 /* Notify clients about changed exit status */
3708 unit_add_to_dbus_queue(u
);
3710 /* We watch the main/control process otherwise we can't retrieve the unit they
3711 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3712 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3713 * detect when the cgroup becomes empty. Note that the control process is always
3714 * our child so it's pointless to watch all other processes. */
3715 if (!control_pid_good(s
))
3716 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3717 (void) unit_enqueue_rewatch_pids(u
);
3720 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3721 Service
*s
= SERVICE(userdata
);
3724 assert(source
== s
->timer_event_source
);
3728 case SERVICE_CONDITION
:
3729 case SERVICE_START_PRE
:
3731 case SERVICE_START_POST
:
3732 switch (s
->timeout_start_failure_mode
) {
3734 case SERVICE_TIMEOUT_TERMINATE
:
3735 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3736 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3739 case SERVICE_TIMEOUT_ABORT
:
3740 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
3741 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3744 case SERVICE_TIMEOUT_KILL
:
3745 if (s
->kill_context
.send_sigkill
) {
3746 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
3747 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3749 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
3750 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3755 assert_not_reached("unknown timeout mode");
3759 case SERVICE_RUNNING
:
3760 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3761 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3764 case SERVICE_RELOAD
:
3765 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3766 service_kill_control_process(s
);
3767 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3768 service_enter_running(s
, SERVICE_SUCCESS
);
3772 switch (s
->timeout_stop_failure_mode
) {
3774 case SERVICE_TIMEOUT_TERMINATE
:
3775 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3776 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3779 case SERVICE_TIMEOUT_ABORT
:
3780 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
3781 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3784 case SERVICE_TIMEOUT_KILL
:
3785 if (s
->kill_context
.send_sigkill
) {
3786 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
3787 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3789 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
3790 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3795 assert_not_reached("unknown timeout mode");
3799 case SERVICE_STOP_WATCHDOG
:
3800 if (s
->kill_context
.send_sigkill
) {
3801 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
3802 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3804 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
3805 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3809 case SERVICE_STOP_SIGTERM
:
3810 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3811 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
3812 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3813 } else if (s
->kill_context
.send_sigkill
) {
3814 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3815 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3817 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3818 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3823 case SERVICE_STOP_SIGKILL
:
3824 /* Uh, we sent a SIGKILL and it is still not gone?
3825 * Must be something we cannot kill, so let's just be
3826 * weirded out and continue */
3828 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3829 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3832 case SERVICE_STOP_POST
:
3833 switch (s
->timeout_stop_failure_mode
) {
3835 case SERVICE_TIMEOUT_TERMINATE
:
3836 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3837 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3840 case SERVICE_TIMEOUT_ABORT
:
3841 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
3842 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3845 case SERVICE_TIMEOUT_KILL
:
3846 if (s
->kill_context
.send_sigkill
) {
3847 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
3848 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3850 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
3851 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3856 assert_not_reached("unknown timeout mode");
3860 case SERVICE_FINAL_WATCHDOG
:
3861 if (s
->kill_context
.send_sigkill
) {
3862 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
3863 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3865 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
3866 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3870 case SERVICE_FINAL_SIGTERM
:
3871 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3872 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
3873 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3874 } else if (s
->kill_context
.send_sigkill
) {
3875 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
3876 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3878 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3879 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3884 case SERVICE_FINAL_SIGKILL
:
3885 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3886 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3889 case SERVICE_AUTO_RESTART
:
3890 if (s
->restart_usec
> 0) {
3891 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3892 log_unit_debug(UNIT(s
),
3893 "Service RestartSec=%s expired, scheduling restart.",
3894 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3896 log_unit_debug(UNIT(s
),
3897 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3899 service_enter_restart(s
);
3902 case SERVICE_CLEANING
:
3903 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3905 if (s
->clean_result
== SERVICE_SUCCESS
)
3906 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3908 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3912 assert_not_reached("Timeout at wrong time.");
3918 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3919 Service
*s
= SERVICE(userdata
);
3920 char t
[FORMAT_TIMESPAN_MAX
];
3921 usec_t watchdog_usec
;
3924 assert(source
== s
->watchdog_event_source
);
3926 watchdog_usec
= service_get_watchdog_usec(s
);
3928 if (UNIT(s
)->manager
->service_watchdogs
) {
3929 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3930 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3932 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3934 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3935 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3940 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
3943 if (s
->notify_access
== NOTIFY_NONE
) {
3944 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3948 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3949 if (s
->main_pid
!= 0)
3950 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
);
3952 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
);
3957 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3958 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3959 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
,
3960 pid
, s
->main_pid
, s
->control_pid
);
3961 else if (s
->main_pid
!= 0)
3962 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
);
3963 else if (s
->control_pid
!= 0)
3964 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
);
3966 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
);
3974 static void service_force_watchdog(Service
*s
) {
3975 if (!UNIT(s
)->manager
->service_watchdogs
)
3978 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3979 s
->status_text
? s
->status_text
: "<unset>");
3981 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3984 static void service_notify_message(
3986 const struct ucred
*ucred
,
3990 Service
*s
= SERVICE(u
);
3991 bool notify_dbus
= false;
3999 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, fds
))
4002 if (DEBUG_LOGGING
) {
4003 _cleanup_free_
char *cc
= NULL
;
4005 cc
= strv_join(tags
, ", ");
4006 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4009 /* Interpret MAINPID= */
4010 e
= strv_find_startswith(tags
, "MAINPID=");
4011 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
4014 if (parse_pid(e
, &new_main_pid
) < 0)
4015 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4016 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4018 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4020 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4022 if (ucred
->uid
== 0) {
4023 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
);
4026 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4029 service_set_main_pid(s
, new_main_pid
);
4031 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4033 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4040 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
4041 STRV_FOREACH_BACKWARDS(i
, tags
) {
4043 if (streq(*i
, "READY=1")) {
4044 s
->notify_state
= NOTIFY_READY
;
4046 /* Type=notify services inform us about completed
4047 * initialization with READY=1 */
4048 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
4049 service_enter_start_post(s
);
4051 /* Sending READY=1 while we are reloading informs us
4052 * that the reloading is complete */
4053 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
4054 service_enter_running(s
, SERVICE_SUCCESS
);
4059 } else if (streq(*i
, "RELOADING=1")) {
4060 s
->notify_state
= NOTIFY_RELOADING
;
4062 if (s
->state
== SERVICE_RUNNING
)
4063 service_enter_reload_by_notify(s
);
4068 } else if (streq(*i
, "STOPPING=1")) {
4069 s
->notify_state
= NOTIFY_STOPPING
;
4071 if (s
->state
== SERVICE_RUNNING
)
4072 service_enter_stop_by_notify(s
);
4079 /* Interpret STATUS= */
4080 e
= strv_find_startswith(tags
, "STATUS=");
4082 _cleanup_free_
char *t
= NULL
;
4085 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4086 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4087 if (strlen(e
) > STATUS_TEXT_MAX
)
4088 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4089 else if (!utf8_is_valid(e
))
4090 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4098 if (!streq_ptr(s
->status_text
, t
)) {
4099 free_and_replace(s
->status_text
, t
);
4104 /* Interpret ERRNO= */
4105 e
= strv_find_startswith(tags
, "ERRNO=");
4109 status_errno
= parse_errno(e
);
4110 if (status_errno
< 0)
4111 log_unit_warning_errno(u
, status_errno
,
4112 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4113 else if (s
->status_errno
!= status_errno
) {
4114 s
->status_errno
= status_errno
;
4119 /* Interpret EXTEND_TIMEOUT= */
4120 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4122 usec_t extend_timeout_usec
;
4123 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4124 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4126 service_extend_timeout(s
, extend_timeout_usec
);
4129 /* Interpret WATCHDOG= */
4130 e
= strv_find_startswith(tags
, "WATCHDOG=");
4133 service_reset_watchdog(s
);
4134 else if (streq(e
, "trigger"))
4135 service_force_watchdog(s
);
4137 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4140 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4142 usec_t watchdog_override_usec
;
4143 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4144 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4146 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4149 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4150 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4151 * fds, but optional when pushing in new fds, for compatibility reasons. */
4152 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4155 name
= strv_find_startswith(tags
, "FDNAME=");
4156 if (!name
|| !fdname_is_valid(name
))
4157 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4159 service_remove_fd_store(s
, name
);
4161 } else if (strv_find(tags
, "FDSTORE=1")) {
4164 name
= strv_find_startswith(tags
, "FDNAME=");
4165 if (name
&& !fdname_is_valid(name
)) {
4166 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4170 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4173 /* Notify clients about changed status or main pid */
4175 unit_add_to_dbus_queue(u
);
4178 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4179 Service
*s
= SERVICE(u
);
4183 if (!s
->timer_event_source
)
4186 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4189 if (t
== USEC_INFINITY
)
4196 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4198 Service
*s
= SERVICE(u
);
4204 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4206 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4208 s
->bus_name_good
= !!new_owner
;
4210 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4211 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4213 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4217 if (s
->type
== SERVICE_DBUS
) {
4219 /* service_enter_running() will figure out what to
4221 if (s
->state
== SERVICE_RUNNING
)
4222 service_enter_running(s
, SERVICE_SUCCESS
);
4223 else if (s
->state
== SERVICE_START
&& new_owner
)
4224 service_enter_start_post(s
);
4226 } else if (new_owner
&&
4234 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4237 /* Try to acquire PID from bus service */
4239 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4241 r
= sd_bus_creds_get_pid(creds
, &pid
);
4243 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4245 service_set_main_pid(s
, pid
);
4246 unit_watch_pid(UNIT(s
), pid
, false);
4251 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4252 _cleanup_free_
char *peer
= NULL
;
4258 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4259 * to be configured. We take ownership of the passed fd on success. */
4261 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4264 if (s
->socket_fd
>= 0)
4267 if (s
->state
!= SERVICE_DEAD
)
4270 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4272 if (UNIT(s
)->description
) {
4273 _cleanup_free_
char *a
;
4275 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4279 r
= unit_set_description(UNIT(s
), a
);
4281 r
= unit_set_description(UNIT(s
), peer
);
4287 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4292 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4294 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4298 static void service_reset_failed(Unit
*u
) {
4299 Service
*s
= SERVICE(u
);
4303 if (s
->state
== SERVICE_FAILED
)
4304 service_set_state(s
, SERVICE_DEAD
);
4306 s
->result
= SERVICE_SUCCESS
;
4307 s
->reload_result
= SERVICE_SUCCESS
;
4308 s
->clean_result
= SERVICE_SUCCESS
;
4310 s
->flush_n_restarts
= false;
4313 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4314 Service
*s
= SERVICE(u
);
4318 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4321 static int service_main_pid(Unit
*u
) {
4322 Service
*s
= SERVICE(u
);
4329 static int service_control_pid(Unit
*u
) {
4330 Service
*s
= SERVICE(u
);
4334 return s
->control_pid
;
4337 static bool service_needs_console(Unit
*u
) {
4338 Service
*s
= SERVICE(u
);
4342 /* We provide our own implementation of this here, instead of relying of the generic implementation
4343 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4345 if (!exec_context_may_touch_console(&s
->exec_context
))
4348 return IN_SET(s
->state
,
4356 SERVICE_STOP_WATCHDOG
,
4357 SERVICE_STOP_SIGTERM
,
4358 SERVICE_STOP_SIGKILL
,
4360 SERVICE_FINAL_WATCHDOG
,
4361 SERVICE_FINAL_SIGTERM
,
4362 SERVICE_FINAL_SIGKILL
);
4365 static int service_exit_status(Unit
*u
) {
4366 Service
*s
= SERVICE(u
);
4370 if (s
->main_exec_status
.pid
<= 0 ||
4371 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4374 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4377 return s
->main_exec_status
.status
;
4380 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4381 _cleanup_strv_free_
char **l
= NULL
;
4382 Service
*s
= SERVICE(u
);
4388 if (s
->state
!= SERVICE_DEAD
)
4391 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4395 if (strv_isempty(l
))
4398 service_unwatch_control_pid(s
);
4399 s
->clean_result
= SERVICE_SUCCESS
;
4400 s
->control_command
= NULL
;
4401 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4403 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4407 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4411 service_set_state(s
, SERVICE_CLEANING
);
4416 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4417 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4418 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4422 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4423 Service
*s
= SERVICE(u
);
4427 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4430 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4431 if (t
== JOB_START
&& result
== JOB_DONE
) {
4432 Service
*s
= SERVICE(u
);
4434 if (s
->type
== SERVICE_ONESHOT
)
4435 return "Finished %s.";
4438 /* Fall back to generic */
4442 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4443 [SERVICE_RESTART_NO
] = "no",
4444 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4445 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4446 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4447 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4448 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4449 [SERVICE_RESTART_ALWAYS
] = "always",
4452 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4454 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4455 [SERVICE_SIMPLE
] = "simple",
4456 [SERVICE_FORKING
] = "forking",
4457 [SERVICE_ONESHOT
] = "oneshot",
4458 [SERVICE_DBUS
] = "dbus",
4459 [SERVICE_NOTIFY
] = "notify",
4460 [SERVICE_IDLE
] = "idle",
4461 [SERVICE_EXEC
] = "exec",
4464 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4466 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4467 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4468 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4469 [SERVICE_EXEC_START
] = "ExecStart",
4470 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4471 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4472 [SERVICE_EXEC_STOP
] = "ExecStop",
4473 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4476 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4478 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4479 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4480 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4481 [SERVICE_EXEC_START
] = "ExecStartEx",
4482 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4483 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4484 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4485 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4488 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4490 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4491 [NOTIFY_UNKNOWN
] = "unknown",
4492 [NOTIFY_READY
] = "ready",
4493 [NOTIFY_RELOADING
] = "reloading",
4494 [NOTIFY_STOPPING
] = "stopping",
4497 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4499 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4500 [SERVICE_SUCCESS
] = "success",
4501 [SERVICE_FAILURE_RESOURCES
] = "resources",
4502 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4503 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4504 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4505 [SERVICE_FAILURE_SIGNAL
] = "signal",
4506 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4507 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4508 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4509 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4510 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4513 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4515 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
4516 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
4517 [SERVICE_TIMEOUT_ABORT
] = "abort",
4518 [SERVICE_TIMEOUT_KILL
] = "kill",
4521 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
4523 const UnitVTable service_vtable
= {
4524 .object_size
= sizeof(Service
),
4525 .exec_context_offset
= offsetof(Service
, exec_context
),
4526 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4527 .kill_context_offset
= offsetof(Service
, kill_context
),
4528 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4529 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4535 .private_section
= "Service",
4537 .can_transient
= true,
4538 .can_delegate
= true,
4541 .init
= service_init
,
4542 .done
= service_done
,
4543 .load
= service_load
,
4544 .release_resources
= service_release_resources
,
4546 .coldplug
= service_coldplug
,
4548 .dump
= service_dump
,
4550 .start
= service_start
,
4551 .stop
= service_stop
,
4552 .reload
= service_reload
,
4554 .can_reload
= service_can_reload
,
4556 .kill
= service_kill
,
4557 .clean
= service_clean
,
4558 .can_clean
= service_can_clean
,
4560 .freeze
= unit_freeze_vtable_common
,
4561 .thaw
= unit_thaw_vtable_common
,
4563 .serialize
= service_serialize
,
4564 .deserialize_item
= service_deserialize_item
,
4566 .active_state
= service_active_state
,
4567 .sub_state_to_string
= service_sub_state_to_string
,
4569 .will_restart
= service_will_restart
,
4571 .may_gc
= service_may_gc
,
4573 .sigchld_event
= service_sigchld_event
,
4575 .reset_failed
= service_reset_failed
,
4577 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4578 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4579 .notify_message
= service_notify_message
,
4581 .main_pid
= service_main_pid
,
4582 .control_pid
= service_control_pid
,
4584 .bus_name_owner_change
= service_bus_name_owner_change
,
4586 .bus_set_property
= bus_service_set_property
,
4587 .bus_commit_properties
= bus_service_commit_properties
,
4589 .get_timeout
= service_get_timeout
,
4590 .needs_console
= service_needs_console
,
4591 .exit_status
= service_exit_status
,
4593 .status_message_formats
= {
4594 .starting_stopping
= {
4595 [0] = "Starting %s...",
4596 [1] = "Stopping %s...",
4598 .finished_start_job
= {
4599 [JOB_FAILED
] = "Failed to start %s.",
4600 [JOB_SKIPPED
] = "Skipped %s.",
4602 .finished_stop_job
= {
4603 [JOB_DONE
] = "Stopped %s.",
4604 [JOB_FAILED
] = "Stopped (with error) %s.",
4606 .finished_job
= service_finished_job
,