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_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1452 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1453 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1454 _cleanup_close_
int exec_fd
= -1;
1455 _cleanup_free_
int *fds
= NULL
;
1463 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1467 if (flags
& EXEC_IS_CONTROL
) {
1468 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1469 if (s
->permissions_start_only
)
1470 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1471 if (s
->root_directory_start_only
)
1472 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1475 if ((flags
& EXEC_PASS_FDS
) ||
1476 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1477 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1478 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1480 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1484 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1487 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1488 assert(!s
->exec_fd_event_source
);
1490 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1495 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1499 our_env
= new0(char*, 10);
1503 if (service_exec_needs_notify_socket(s
, flags
))
1504 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1507 if (s
->main_pid
> 0)
1508 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1511 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1512 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1516 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1519 if (s
->socket_fd
>= 0) {
1520 union sockaddr_union sa
;
1521 socklen_t salen
= sizeof(sa
);
1523 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1524 * useful. Note that we do this only when we are still connected at this point in time, which we might
1525 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1526 * in ENOTCONN), and just use whate we can use. */
1528 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1529 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1531 _cleanup_free_
char *addr
= NULL
;
1535 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1539 t
= strjoin("REMOTE_ADDR=", addr
);
1542 our_env
[n_env
++] = t
;
1544 r
= sockaddr_port(&sa
.sa
, &port
);
1548 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1550 our_env
[n_env
++] = t
;
1554 if (flags
& EXEC_SETENV_RESULT
) {
1555 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1558 if (s
->main_exec_status
.pid
> 0 &&
1559 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1560 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1563 if (s
->main_exec_status
.code
== CLD_EXITED
)
1564 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1566 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1572 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1576 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1580 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1581 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1582 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1584 strv_free_and_replace(exec_params
.environment
, final_env
);
1585 exec_params
.fds
= fds
;
1586 exec_params
.fd_names
= fd_names
;
1587 exec_params
.n_socket_fds
= n_socket_fds
;
1588 exec_params
.n_storage_fds
= n_storage_fds
;
1589 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1590 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1591 if (s
->type
== SERVICE_IDLE
)
1592 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1593 exec_params
.stdin_fd
= s
->stdin_fd
;
1594 exec_params
.stdout_fd
= s
->stdout_fd
;
1595 exec_params
.stderr_fd
= s
->stderr_fd
;
1596 exec_params
.exec_fd
= exec_fd
;
1598 r
= exec_spawn(UNIT(s
),
1608 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1609 s
->exec_fd_hot
= false;
1611 r
= unit_watch_pid(UNIT(s
), pid
, true);
1620 static int main_pid_good(Service
*s
) {
1623 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1625 /* If we know the pid file, then let's just check if it is
1627 if (s
->main_pid_known
) {
1629 /* If it's an alien child let's check if it is still
1631 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1632 return pid_is_alive(s
->main_pid
);
1634 /* .. otherwise assume we'll get a SIGCHLD for it,
1635 * which we really should wait for to collect exit
1636 * status and code */
1637 return s
->main_pid
> 0;
1640 /* We don't know the pid */
1644 static int control_pid_good(Service
*s
) {
1647 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1648 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1649 * means: we can't figure it out. */
1651 return s
->control_pid
> 0;
1654 static int cgroup_good(Service
*s
) {
1659 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1662 if (!UNIT(s
)->cgroup_path
)
1665 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1672 static bool service_shall_restart(Service
*s
, const char **reason
) {
1675 /* Don't restart after manual stops */
1676 if (s
->forbid_restart
) {
1677 *reason
= "manual stop";
1681 /* Never restart if this is configured as special exception */
1682 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1683 *reason
= "prevented by exit status";
1687 /* Restart if the exit code/status are configured as restart triggers */
1688 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1689 *reason
= "forced by exit status";
1693 *reason
= "restart setting";
1694 switch (s
->restart
) {
1696 case SERVICE_RESTART_NO
:
1699 case SERVICE_RESTART_ALWAYS
:
1702 case SERVICE_RESTART_ON_SUCCESS
:
1703 return s
->result
== SERVICE_SUCCESS
;
1705 case SERVICE_RESTART_ON_FAILURE
:
1706 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1708 case SERVICE_RESTART_ON_ABNORMAL
:
1709 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1711 case SERVICE_RESTART_ON_WATCHDOG
:
1712 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1714 case SERVICE_RESTART_ON_ABORT
:
1715 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1718 assert_not_reached("unknown restart setting");
1722 static bool service_will_restart(Unit
*u
) {
1723 Service
*s
= SERVICE(u
);
1727 if (s
->will_auto_restart
)
1729 if (s
->state
== SERVICE_AUTO_RESTART
)
1732 return unit_will_restart_default(u
);
1735 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1736 ServiceState end_state
;
1741 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1742 * undo what has already been enqueued. */
1743 if (unit_stop_pending(UNIT(s
)))
1744 allow_restart
= false;
1746 if (s
->result
== SERVICE_SUCCESS
)
1749 if (s
->result
== SERVICE_SUCCESS
) {
1750 unit_log_success(UNIT(s
));
1751 end_state
= SERVICE_DEAD
;
1752 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1753 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1754 end_state
= SERVICE_DEAD
;
1756 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1757 end_state
= SERVICE_FAILED
;
1759 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1762 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1767 shall_restart
= service_shall_restart(s
, &reason
);
1768 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1769 shall_restart
? "" : "not ",
1772 s
->will_auto_restart
= true;
1775 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1776 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1777 s
->n_keep_fd_store
++;
1779 service_set_state(s
, end_state
);
1781 if (s
->will_auto_restart
) {
1782 s
->will_auto_restart
= false;
1784 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1786 s
->n_keep_fd_store
--;
1790 service_set_state(s
, SERVICE_AUTO_RESTART
);
1792 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1793 * user can still introspect the counter. Do so on the next start. */
1794 s
->flush_n_restarts
= true;
1796 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1797 * queue, so that the fd store is possibly gc'ed again */
1798 s
->n_keep_fd_store
--;
1799 unit_add_to_gc_queue(UNIT(s
));
1801 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1802 s
->forbid_restart
= false;
1804 /* We want fresh tmpdirs in case service is started again immediately */
1805 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1807 /* Also, remove the runtime directory */
1808 unit_destroy_runtime_directory(UNIT(s
), &s
->exec_context
);
1810 /* Get rid of the IPC bits of the user */
1811 unit_unref_uid_gid(UNIT(s
), true);
1813 /* Release the user, and destroy it if we are the only remaining owner */
1814 dynamic_creds_destroy(&s
->dynamic_creds
);
1816 /* Try to delete the pid file. At this point it will be
1817 * out-of-date, and some software might be confused by it, so
1818 * let's remove it. */
1820 (void) unlink(s
->pid_file
);
1822 /* Reset TTY ownership if necessary */
1823 exec_context_revert_tty(&s
->exec_context
);
1828 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1829 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1832 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1836 if (s
->result
== SERVICE_SUCCESS
)
1839 service_unwatch_control_pid(s
);
1840 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1842 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1843 if (s
->control_command
) {
1844 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1846 r
= service_spawn(s
,
1848 s
->timeout_stop_usec
,
1849 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1854 service_set_state(s
, SERVICE_STOP_POST
);
1856 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1861 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1862 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1865 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1868 case SERVICE_STOP_WATCHDOG
:
1869 case SERVICE_FINAL_WATCHDOG
:
1870 return KILL_WATCHDOG
;
1872 case SERVICE_STOP_SIGTERM
:
1873 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1874 return KILL_RESTART
;
1877 case SERVICE_FINAL_SIGTERM
:
1878 return KILL_TERMINATE
;
1880 case SERVICE_STOP_SIGKILL
:
1881 case SERVICE_FINAL_SIGKILL
:
1885 return _KILL_OPERATION_INVALID
;
1889 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1890 int kill_operation
, r
;
1894 if (s
->result
== SERVICE_SUCCESS
)
1897 /* Before sending any signal, make sure we track all members of this cgroup */
1898 (void) unit_watch_all_pids(UNIT(s
));
1900 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1902 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1904 kill_operation
= state_to_kill_operation(s
, state
);
1905 r
= unit_kill_context(
1916 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1917 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1921 service_set_state(s
, state
);
1922 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1923 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1924 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1925 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1926 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
1927 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1929 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1934 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1936 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1937 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1939 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1942 static void service_enter_stop_by_notify(Service
*s
) {
1945 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1947 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1949 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1950 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1953 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1958 if (s
->result
== SERVICE_SUCCESS
)
1961 service_unwatch_control_pid(s
);
1962 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1964 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1965 if (s
->control_command
) {
1966 s
->control_command_id
= SERVICE_EXEC_STOP
;
1968 r
= service_spawn(s
,
1970 s
->timeout_stop_usec
,
1971 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1976 service_set_state(s
, SERVICE_STOP
);
1978 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1983 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1984 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1987 static bool service_good(Service
*s
) {
1991 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1994 main_pid_ok
= main_pid_good(s
);
1995 if (main_pid_ok
> 0) /* It's alive */
1997 if (main_pid_ok
== 0) /* It's dead */
2000 /* OK, we don't know anything about the main PID, maybe
2001 * because there is none. Let's check the control group
2004 return cgroup_good(s
) != 0;
2007 static void service_enter_running(Service
*s
, ServiceResult f
) {
2010 if (s
->result
== SERVICE_SUCCESS
)
2013 service_unwatch_control_pid(s
);
2015 if (s
->result
!= SERVICE_SUCCESS
)
2016 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2017 else if (service_good(s
)) {
2019 /* If there are any queued up sd_notify() notifications, process them now */
2020 if (s
->notify_state
== NOTIFY_RELOADING
)
2021 service_enter_reload_by_notify(s
);
2022 else if (s
->notify_state
== NOTIFY_STOPPING
)
2023 service_enter_stop_by_notify(s
);
2025 service_set_state(s
, SERVICE_RUNNING
);
2026 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2029 } else if (s
->remain_after_exit
)
2030 service_set_state(s
, SERVICE_EXITED
);
2032 service_enter_stop(s
, SERVICE_SUCCESS
);
2035 static void service_enter_start_post(Service
*s
) {
2039 service_unwatch_control_pid(s
);
2040 service_reset_watchdog(s
);
2042 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2043 if (s
->control_command
) {
2044 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2046 r
= service_spawn(s
,
2048 s
->timeout_start_usec
,
2049 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2054 service_set_state(s
, SERVICE_START_POST
);
2056 service_enter_running(s
, SERVICE_SUCCESS
);
2061 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2062 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2065 static void service_kill_control_process(Service
*s
) {
2070 if (s
->control_pid
<= 0)
2073 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2075 _cleanup_free_
char *comm
= NULL
;
2077 (void) get_process_comm(s
->control_pid
, &comm
);
2079 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2080 s
->control_pid
, strna(comm
));
2084 static int service_adverse_to_leftover_processes(Service
*s
) {
2087 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2088 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2089 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2090 * time is quite variable (so Timeout settings aren't of use).
2092 * Here we take these two factors and refuse to start a service if there are existing processes
2093 * within a control group. Databases, while generally having some protection against multiple
2094 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2095 * aren't as rigoriously written to protect aganst against multiple use. */
2097 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2098 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2099 !s
->kill_context
.send_sigkill
)
2100 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2101 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2106 static void service_enter_start(Service
*s
) {
2114 service_unwatch_control_pid(s
);
2115 service_unwatch_main_pid(s
);
2117 r
= service_adverse_to_leftover_processes(s
);
2121 if (s
->type
== SERVICE_FORKING
) {
2122 s
->control_command_id
= SERVICE_EXEC_START
;
2123 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2125 s
->main_command
= NULL
;
2127 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2128 s
->control_command
= NULL
;
2130 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2134 if (s
->type
!= SERVICE_ONESHOT
) {
2135 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2136 * happen if the configuration changes at runtime. In this case, let's enter a failure
2138 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2143 /* We force a fake state transition here. Otherwise, the unit would go directly from
2144 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2145 * in between. This way we can later trigger actions that depend on the state
2146 * transition, including SuccessAction=. */
2147 service_set_state(s
, SERVICE_START
);
2149 service_enter_start_post(s
);
2153 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2154 /* For simple + idle this is the main process. We don't apply any timeout here, but
2155 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2156 timeout
= USEC_INFINITY
;
2158 timeout
= s
->timeout_start_usec
;
2160 r
= service_spawn(s
,
2163 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2168 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2169 /* For simple services we immediately start
2170 * the START_POST binaries. */
2172 service_set_main_pid(s
, pid
);
2173 service_enter_start_post(s
);
2175 } else if (s
->type
== SERVICE_FORKING
) {
2177 /* For forking services we wait until the start
2178 * process exited. */
2180 s
->control_pid
= pid
;
2181 service_set_state(s
, SERVICE_START
);
2183 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2185 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2187 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2188 * bus. 'notify' and 'exec' services are similar. */
2190 service_set_main_pid(s
, pid
);
2191 service_set_state(s
, SERVICE_START
);
2193 assert_not_reached("Unknown service type");
2198 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2199 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2202 static void service_enter_start_pre(Service
*s
) {
2207 service_unwatch_control_pid(s
);
2209 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2210 if (s
->control_command
) {
2212 r
= service_adverse_to_leftover_processes(s
);
2216 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2218 r
= service_spawn(s
,
2220 s
->timeout_start_usec
,
2221 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2226 service_set_state(s
, SERVICE_START_PRE
);
2228 service_enter_start(s
);
2233 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2234 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2237 static void service_enter_condition(Service
*s
) {
2242 service_unwatch_control_pid(s
);
2244 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2245 if (s
->control_command
) {
2247 r
= service_adverse_to_leftover_processes(s
);
2251 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2253 r
= service_spawn(s
,
2255 s
->timeout_start_usec
,
2256 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2262 service_set_state(s
, SERVICE_CONDITION
);
2264 service_enter_start_pre(s
);
2269 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2270 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2273 static void service_enter_restart(Service
*s
) {
2274 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2279 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2280 /* Don't restart things if we are going down anyway */
2281 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2283 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2290 /* Any units that are bound to this service must also be
2291 * restarted. We use JOB_RESTART (instead of the more obvious
2292 * JOB_START) here so that those dependency jobs will be added
2294 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2298 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2299 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2300 * explicitly however via the usual "systemctl reset-failure" logic. */
2302 s
->flush_n_restarts
= false;
2304 log_struct(LOG_INFO
,
2305 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2306 LOG_UNIT_ID(UNIT(s
)),
2307 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2308 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2309 "N_RESTARTS=%u", s
->n_restarts
);
2311 /* Notify clients about changed restart counter */
2312 unit_add_to_dbus_queue(UNIT(s
));
2314 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2315 * it will be canceled as part of the service_stop() call that
2316 * is executed as part of JOB_RESTART. */
2321 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2322 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2325 static void service_enter_reload_by_notify(Service
*s
) {
2326 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2331 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2332 service_set_state(s
, SERVICE_RELOAD
);
2334 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2335 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2337 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2340 static void service_enter_reload(Service
*s
) {
2345 service_unwatch_control_pid(s
);
2346 s
->reload_result
= SERVICE_SUCCESS
;
2348 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2349 if (s
->control_command
) {
2350 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2352 r
= service_spawn(s
,
2354 s
->timeout_start_usec
,
2355 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2360 service_set_state(s
, SERVICE_RELOAD
);
2362 service_enter_running(s
, SERVICE_SUCCESS
);
2367 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2368 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2369 service_enter_running(s
, SERVICE_SUCCESS
);
2372 static void service_run_next_control(Service
*s
) {
2377 assert(s
->control_command
);
2378 assert(s
->control_command
->command_next
);
2380 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2382 s
->control_command
= s
->control_command
->command_next
;
2383 service_unwatch_control_pid(s
);
2385 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2386 timeout
= s
->timeout_start_usec
;
2388 timeout
= s
->timeout_stop_usec
;
2390 r
= service_spawn(s
,
2393 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2394 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2395 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2396 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2404 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2406 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2407 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2408 else if (s
->state
== SERVICE_STOP_POST
)
2409 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2410 else if (s
->state
== SERVICE_RELOAD
) {
2411 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2412 service_enter_running(s
, SERVICE_SUCCESS
);
2414 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2417 static void service_run_next_main(Service
*s
) {
2422 assert(s
->main_command
);
2423 assert(s
->main_command
->command_next
);
2424 assert(s
->type
== SERVICE_ONESHOT
);
2426 s
->main_command
= s
->main_command
->command_next
;
2427 service_unwatch_main_pid(s
);
2429 r
= service_spawn(s
,
2431 s
->timeout_start_usec
,
2432 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2437 service_set_main_pid(s
, pid
);
2442 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2443 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2446 static int service_start(Unit
*u
) {
2447 Service
*s
= SERVICE(u
);
2452 /* We cannot fulfill this request right now, try again later
2454 if (IN_SET(s
->state
,
2455 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2456 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2459 /* Already on it! */
2460 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2463 /* A service that will be restarted must be stopped first to
2464 * trigger BindsTo and/or OnFailure dependencies. If a user
2465 * does not want to wait for the holdoff time to elapse, the
2466 * service should be manually restarted, not started. We
2467 * simply return EAGAIN here, so that any start jobs stay
2468 * queued, and assume that the auto restart timer will
2469 * eventually trigger the restart. */
2470 if (s
->state
== SERVICE_AUTO_RESTART
)
2473 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2475 /* Make sure we don't enter a busy loop of some kind. */
2476 r
= unit_test_start_limit(u
);
2478 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2482 r
= unit_acquire_invocation_id(u
);
2486 s
->result
= SERVICE_SUCCESS
;
2487 s
->reload_result
= SERVICE_SUCCESS
;
2488 s
->main_pid_known
= false;
2489 s
->main_pid_alien
= false;
2490 s
->forbid_restart
= false;
2492 s
->status_text
= mfree(s
->status_text
);
2493 s
->status_errno
= 0;
2495 s
->notify_state
= NOTIFY_UNKNOWN
;
2497 s
->watchdog_original_usec
= s
->watchdog_usec
;
2498 s
->watchdog_override_enable
= false;
2499 s
->watchdog_override_usec
= USEC_INFINITY
;
2501 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2502 exec_status_reset(&s
->main_exec_status
);
2504 /* This is not an automatic restart? Flush the restart counter then */
2505 if (s
->flush_n_restarts
) {
2507 s
->flush_n_restarts
= false;
2510 u
->reset_accounting
= true;
2512 service_enter_condition(s
);
2516 static int service_stop(Unit
*u
) {
2517 Service
*s
= SERVICE(u
);
2521 /* Don't create restart jobs from manual stops. */
2522 s
->forbid_restart
= true;
2525 if (IN_SET(s
->state
,
2526 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2527 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2530 /* A restart will be scheduled or is in progress. */
2531 if (s
->state
== SERVICE_AUTO_RESTART
) {
2532 service_set_state(s
, SERVICE_DEAD
);
2536 /* If there's already something running we go directly into
2538 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2539 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2543 /* If we are currently cleaning, then abort it, brutally. */
2544 if (s
->state
== SERVICE_CLEANING
) {
2545 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2549 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2551 service_enter_stop(s
, SERVICE_SUCCESS
);
2555 static int service_reload(Unit
*u
) {
2556 Service
*s
= SERVICE(u
);
2560 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2562 service_enter_reload(s
);
2566 _pure_
static bool service_can_reload(Unit
*u
) {
2567 Service
*s
= SERVICE(u
);
2571 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2574 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2575 Service
*s
= SERVICE(u
);
2577 ExecCommand
*first
, *c
;
2581 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2583 first
= s
->exec_command
[id
];
2585 /* Figure out where we are in the list by walking back to the beginning */
2586 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2592 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2593 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2594 size_t allocated
= 0, length
= 0;
2595 Service
*s
= SERVICE(u
);
2596 const char *type
, *key
;
2597 ServiceExecCommand id
;
2607 if (command
== s
->control_command
) {
2609 id
= s
->control_command_id
;
2612 id
= SERVICE_EXEC_START
;
2615 idx
= service_exec_command_index(u
, id
, command
);
2617 STRV_FOREACH(arg
, command
->argv
) {
2618 _cleanup_free_
char *e
= NULL
;
2626 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2630 args
[length
++] = ' ';
2632 args
[length
++] = '"';
2633 memcpy(args
+ length
, e
, n
);
2635 args
[length
++] = '"';
2638 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2643 p
= cescape(command
->path
);
2647 key
= strjoina(type
, "-command");
2648 (void) serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2653 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2654 Service
*s
= SERVICE(u
);
2662 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2663 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2664 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2666 if (s
->control_pid
> 0)
2667 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2669 if (s
->main_pid_known
&& s
->main_pid
> 0)
2670 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2672 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2673 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2674 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2676 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2677 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2679 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2683 service_serialize_exec_command(u
, f
, s
->control_command
);
2684 service_serialize_exec_command(u
, f
, s
->main_command
);
2686 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2689 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2692 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2696 if (s
->exec_fd_event_source
) {
2697 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2701 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2704 if (UNIT_ISSET(s
->accept_socket
)) {
2705 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2710 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2714 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2715 _cleanup_free_
char *c
= NULL
;
2718 copy
= fdset_put_dup(fds
, fs
->fd
);
2720 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2722 c
= cescape(fs
->fdname
);
2726 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2729 if (s
->main_exec_status
.pid
> 0) {
2730 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2731 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2732 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2734 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2735 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2736 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2740 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2741 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2743 if (s
->watchdog_override_enable
)
2744 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2746 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2747 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2752 static int service_deserialize_exec_command(
2755 const char *value
) {
2757 Service
*s
= SERVICE(u
);
2759 unsigned idx
= 0, i
;
2760 bool control
, found
= false;
2761 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2762 ExecCommand
*command
= NULL
;
2763 _cleanup_free_
char *path
= NULL
;
2764 _cleanup_strv_free_
char **argv
= NULL
;
2766 enum ExecCommandState
{
2767 STATE_EXEC_COMMAND_TYPE
,
2768 STATE_EXEC_COMMAND_INDEX
,
2769 STATE_EXEC_COMMAND_PATH
,
2770 STATE_EXEC_COMMAND_ARGS
,
2771 _STATE_EXEC_COMMAND_MAX
,
2772 _STATE_EXEC_COMMAND_INVALID
= -1,
2779 control
= streq(key
, "control-command");
2781 state
= STATE_EXEC_COMMAND_TYPE
;
2784 _cleanup_free_
char *arg
= NULL
;
2786 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2793 case STATE_EXEC_COMMAND_TYPE
:
2794 id
= service_exec_command_from_string(arg
);
2798 state
= STATE_EXEC_COMMAND_INDEX
;
2800 case STATE_EXEC_COMMAND_INDEX
:
2801 r
= safe_atou(arg
, &idx
);
2805 state
= STATE_EXEC_COMMAND_PATH
;
2807 case STATE_EXEC_COMMAND_PATH
:
2808 path
= TAKE_PTR(arg
);
2809 state
= STATE_EXEC_COMMAND_ARGS
;
2811 if (!path_is_absolute(path
))
2814 case STATE_EXEC_COMMAND_ARGS
:
2815 r
= strv_extend(&argv
, arg
);
2820 assert_not_reached("Unknown error at deserialization of exec command");
2825 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2828 /* Let's check whether exec command on given offset matches data that we just deserialized */
2829 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2833 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2838 /* Command at the index we serialized is different, let's look for command that exactly
2839 * matches but is on different index. If there is no such command we will not resume execution. */
2840 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2841 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2845 if (command
&& control
) {
2846 s
->control_command
= command
;
2847 s
->control_command_id
= id
;
2849 s
->main_command
= command
;
2851 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2856 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2857 Service
*s
= SERVICE(u
);
2865 if (streq(key
, "state")) {
2868 state
= service_state_from_string(value
);
2870 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2872 s
->deserialized_state
= state
;
2873 } else if (streq(key
, "result")) {
2876 f
= service_result_from_string(value
);
2878 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2879 else if (f
!= SERVICE_SUCCESS
)
2882 } else if (streq(key
, "reload-result")) {
2885 f
= service_result_from_string(value
);
2887 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2888 else if (f
!= SERVICE_SUCCESS
)
2889 s
->reload_result
= f
;
2891 } else if (streq(key
, "control-pid")) {
2894 if (parse_pid(value
, &pid
) < 0)
2895 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2897 s
->control_pid
= pid
;
2898 } else if (streq(key
, "main-pid")) {
2901 if (parse_pid(value
, &pid
) < 0)
2902 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2904 (void) service_set_main_pid(s
, pid
);
2905 } else if (streq(key
, "main-pid-known")) {
2908 b
= parse_boolean(value
);
2910 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2912 s
->main_pid_known
= b
;
2913 } else if (streq(key
, "bus-name-good")) {
2916 b
= parse_boolean(value
);
2918 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2920 s
->bus_name_good
= b
;
2921 } else if (streq(key
, "bus-name-owner")) {
2922 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2924 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2925 } else if (streq(key
, "status-text")) {
2928 r
= cunescape(value
, 0, &t
);
2930 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2932 free_and_replace(s
->status_text
, t
);
2934 } else if (streq(key
, "accept-socket")) {
2937 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2939 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2941 unit_ref_set(&s
->accept_socket
, u
, socket
);
2942 SOCKET(socket
)->n_connections
++;
2945 } else if (streq(key
, "socket-fd")) {
2948 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2949 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2951 asynchronous_close(s
->socket_fd
);
2952 s
->socket_fd
= fdset_remove(fds
, fd
);
2954 } else if (streq(key
, "fd-store-fd")) {
2955 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
2959 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2960 if (r
<= 0 || safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
)) {
2961 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2965 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2967 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2971 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
2973 /* If the value is not present, we assume the default */
2975 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
2976 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2980 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
2982 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2984 fdset_remove(fds
, fd
);
2985 } else if (streq(key
, "main-exec-status-pid")) {
2988 if (parse_pid(value
, &pid
) < 0)
2989 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2991 s
->main_exec_status
.pid
= pid
;
2992 } else if (streq(key
, "main-exec-status-code")) {
2995 if (safe_atoi(value
, &i
) < 0)
2996 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2998 s
->main_exec_status
.code
= i
;
2999 } else if (streq(key
, "main-exec-status-status")) {
3002 if (safe_atoi(value
, &i
) < 0)
3003 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3005 s
->main_exec_status
.status
= i
;
3006 } else if (streq(key
, "main-exec-status-start"))
3007 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3008 else if (streq(key
, "main-exec-status-exit"))
3009 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3010 else if (streq(key
, "watchdog-timestamp"))
3011 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3012 else if (streq(key
, "forbid-restart")) {
3015 b
= parse_boolean(value
);
3017 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3019 s
->forbid_restart
= b
;
3020 } else if (streq(key
, "stdin-fd")) {
3023 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3024 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3026 asynchronous_close(s
->stdin_fd
);
3027 s
->stdin_fd
= fdset_remove(fds
, fd
);
3028 s
->exec_context
.stdio_as_fds
= true;
3030 } else if (streq(key
, "stdout-fd")) {
3033 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3034 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3036 asynchronous_close(s
->stdout_fd
);
3037 s
->stdout_fd
= fdset_remove(fds
, fd
);
3038 s
->exec_context
.stdio_as_fds
= true;
3040 } else if (streq(key
, "stderr-fd")) {
3043 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3044 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3046 asynchronous_close(s
->stderr_fd
);
3047 s
->stderr_fd
= fdset_remove(fds
, fd
);
3048 s
->exec_context
.stdio_as_fds
= true;
3050 } else if (streq(key
, "exec-fd")) {
3053 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3054 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3056 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3058 fd
= fdset_remove(fds
, fd
);
3059 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3062 } else if (streq(key
, "watchdog-override-usec")) {
3063 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3064 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3066 s
->watchdog_override_enable
= true;
3068 } else if (streq(key
, "watchdog-original-usec")) {
3069 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3070 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3072 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3073 r
= service_deserialize_exec_command(u
, key
, value
);
3075 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3077 } else if (streq(key
, "n-restarts")) {
3078 r
= safe_atou(value
, &s
->n_restarts
);
3080 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3082 } else if (streq(key
, "flush-n-restarts")) {
3083 r
= parse_boolean(value
);
3085 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3087 s
->flush_n_restarts
= r
;
3089 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3094 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3095 const UnitActiveState
*table
;
3099 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3101 return table
[SERVICE(u
)->state
];
3104 static const char *service_sub_state_to_string(Unit
*u
) {
3107 return service_state_to_string(SERVICE(u
)->state
);
3110 static bool service_may_gc(Unit
*u
) {
3111 Service
*s
= SERVICE(u
);
3115 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3116 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3117 * have moved outside of the cgroup. */
3119 if (main_pid_good(s
) > 0 ||
3120 control_pid_good(s
) > 0)
3126 static int service_retry_pid_file(Service
*s
) {
3129 assert(s
->pid_file
);
3130 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3132 r
= service_load_pid_file(s
, false);
3136 service_unwatch_pid_file(s
);
3138 service_enter_running(s
, SERVICE_SUCCESS
);
3142 static int service_watch_pid_file(Service
*s
) {
3145 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3147 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3151 /* the pidfile might have appeared just before we set the watch */
3152 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3153 service_retry_pid_file(s
);
3157 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3158 service_unwatch_pid_file(s
);
3162 static int service_demand_pid_file(Service
*s
) {
3165 assert(s
->pid_file
);
3166 assert(!s
->pid_file_pathspec
);
3168 ps
= new0(PathSpec
, 1);
3173 ps
->path
= strdup(s
->pid_file
);
3179 path_simplify(ps
->path
, false);
3181 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3182 * keep their PID file open all the time. */
3183 ps
->type
= PATH_MODIFIED
;
3184 ps
->inotify_fd
= -1;
3186 s
->pid_file_pathspec
= ps
;
3188 return service_watch_pid_file(s
);
3191 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3192 PathSpec
*p
= userdata
;
3197 s
= SERVICE(p
->unit
);
3201 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3202 assert(s
->pid_file_pathspec
);
3203 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3205 log_unit_debug(UNIT(s
), "inotify event");
3207 if (path_spec_fd_event(p
, events
) < 0)
3210 if (service_retry_pid_file(s
) == 0)
3213 if (service_watch_pid_file(s
) < 0)
3219 service_unwatch_pid_file(s
);
3220 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3224 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3225 Service
*s
= SERVICE(userdata
);
3229 log_unit_debug(UNIT(s
), "got exec-fd event");
3231 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3232 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3233 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3234 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3235 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3236 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3237 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3238 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3244 n
= read(fd
, &x
, sizeof(x
));
3246 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3249 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3251 if (n
== 0) { /* EOF → the event we are waiting for */
3253 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3255 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3256 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3258 s
->exec_fd_hot
= false;
3260 /* Nice! This is what we have been waiting for. Transition to next state. */
3261 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3262 service_enter_start_post(s
);
3264 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3269 /* A byte was read → this turns on/off the exec fd logic */
3270 assert(n
== sizeof(x
));
3277 static void service_notify_cgroup_empty_event(Unit
*u
) {
3278 Service
*s
= SERVICE(u
);
3282 log_unit_debug(u
, "Control group is empty.");
3286 /* Waiting for SIGCHLD is usually more interesting,
3287 * because it includes return codes/signals. Which is
3288 * why we ignore the cgroup events for most cases,
3289 * except when we don't know pid which to expect the
3293 if (s
->type
== SERVICE_NOTIFY
&&
3294 main_pid_good(s
) == 0 &&
3295 control_pid_good(s
) == 0) {
3296 /* No chance of getting a ready notification anymore */
3297 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3302 case SERVICE_START_POST
:
3303 if (s
->pid_file_pathspec
&&
3304 main_pid_good(s
) == 0 &&
3305 control_pid_good(s
) == 0) {
3307 /* Give up hoping for the daemon to write its PID file */
3308 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3310 service_unwatch_pid_file(s
);
3311 if (s
->state
== SERVICE_START
)
3312 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3314 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3318 case SERVICE_RUNNING
:
3319 /* service_enter_running() will figure out what to do */
3320 service_enter_running(s
, SERVICE_SUCCESS
);
3323 case SERVICE_STOP_WATCHDOG
:
3324 case SERVICE_STOP_SIGTERM
:
3325 case SERVICE_STOP_SIGKILL
:
3327 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3328 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3332 case SERVICE_STOP_POST
:
3333 case SERVICE_FINAL_WATCHDOG
:
3334 case SERVICE_FINAL_SIGTERM
:
3335 case SERVICE_FINAL_SIGKILL
:
3336 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3337 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3346 static void service_notify_cgroup_oom_event(Unit
*u
) {
3347 Service
*s
= SERVICE(u
);
3349 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3351 if (s
->oom_policy
== OOM_CONTINUE
)
3356 case SERVICE_CONDITION
:
3357 case SERVICE_START_PRE
:
3359 case SERVICE_START_POST
:
3361 if (s
->oom_policy
== OOM_STOP
)
3362 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3363 else if (s
->oom_policy
== OOM_KILL
)
3364 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3368 case SERVICE_EXITED
:
3369 case SERVICE_RUNNING
:
3370 if (s
->oom_policy
== OOM_STOP
)
3371 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3372 else if (s
->oom_policy
== OOM_KILL
)
3373 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3377 case SERVICE_STOP_WATCHDOG
:
3378 case SERVICE_STOP_SIGTERM
:
3379 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3382 case SERVICE_STOP_SIGKILL
:
3383 case SERVICE_FINAL_SIGKILL
:
3384 if (s
->result
== SERVICE_SUCCESS
)
3385 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3388 case SERVICE_STOP_POST
:
3389 case SERVICE_FINAL_SIGTERM
:
3390 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3398 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3399 bool notify_dbus
= true;
3400 Service
*s
= SERVICE(u
);
3402 ExitClean clean_mode
;
3407 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3408 * considered daemons as they are typically not long running. */
3409 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3410 clean_mode
= EXIT_CLEAN_COMMAND
;
3412 clean_mode
= EXIT_CLEAN_DAEMON
;
3414 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3415 f
= SERVICE_SUCCESS
;
3416 else if (code
== CLD_EXITED
)
3417 f
= SERVICE_FAILURE_EXIT_CODE
;
3418 else if (code
== CLD_KILLED
)
3419 f
= SERVICE_FAILURE_SIGNAL
;
3420 else if (code
== CLD_DUMPED
)
3421 f
= SERVICE_FAILURE_CORE_DUMP
;
3423 assert_not_reached("Unknown code");
3425 if (s
->main_pid
== pid
) {
3426 /* Forking services may occasionally move to a new PID.
3427 * As long as they update the PID file before exiting the old
3428 * PID, they're fine. */
3429 if (service_load_pid_file(s
, false) > 0)
3433 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3435 if (s
->main_command
) {
3436 /* If this is not a forking service than the
3437 * main process got started and hence we copy
3438 * the exit status so that it is recorded both
3439 * as main and as control process exit
3442 s
->main_command
->exec_status
= s
->main_exec_status
;
3444 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3445 f
= SERVICE_SUCCESS
;
3446 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3448 /* If this is a forked process, then we should
3449 * ignore the return value if this was
3450 * configured for the starter process */
3452 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3453 f
= SERVICE_SUCCESS
;
3456 unit_log_process_exit(
3459 service_exec_command_to_string(SERVICE_EXEC_START
),
3460 f
== SERVICE_SUCCESS
,
3463 if (s
->result
== SERVICE_SUCCESS
)
3466 if (s
->main_command
&&
3467 s
->main_command
->command_next
&&
3468 s
->type
== SERVICE_ONESHOT
&&
3469 f
== SERVICE_SUCCESS
) {
3471 /* There is another command to *
3472 * execute, so let's do that. */
3474 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3475 service_run_next_main(s
);
3479 /* The service exited, so the service is officially
3481 s
->main_command
= NULL
;
3485 case SERVICE_START_POST
:
3486 case SERVICE_RELOAD
:
3488 /* Need to wait until the operation is
3493 if (s
->type
== SERVICE_ONESHOT
) {
3494 /* This was our main goal, so let's go on */
3495 if (f
== SERVICE_SUCCESS
)
3496 service_enter_start_post(s
);
3498 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3500 } else if (s
->type
== SERVICE_NOTIFY
) {
3501 /* Only enter running through a notification, so that the
3502 * SERVICE_START state signifies that no ready notification
3503 * has been received */
3504 if (f
!= SERVICE_SUCCESS
)
3505 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3506 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3507 /* The service has never been and will never be active */
3508 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3513 case SERVICE_RUNNING
:
3514 service_enter_running(s
, f
);
3517 case SERVICE_STOP_WATCHDOG
:
3518 case SERVICE_STOP_SIGTERM
:
3519 case SERVICE_STOP_SIGKILL
:
3521 if (control_pid_good(s
) <= 0)
3522 service_enter_stop_post(s
, f
);
3524 /* If there is still a control process, wait for that first */
3527 case SERVICE_STOP_POST
:
3529 if (control_pid_good(s
) <= 0)
3530 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3534 case SERVICE_FINAL_WATCHDOG
:
3535 case SERVICE_FINAL_SIGTERM
:
3536 case SERVICE_FINAL_SIGKILL
:
3538 if (control_pid_good(s
) <= 0)
3539 service_enter_dead(s
, f
, true);
3543 assert_not_reached("Uh, main process died at wrong time.");
3547 } else if (s
->control_pid
== pid
) {
3550 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3551 if (f
== SERVICE_FAILURE_EXIT_CODE
&& s
->state
== SERVICE_CONDITION
&& status
< 255)
3552 f
= SERVICE_SKIP_CONDITION
;
3554 if (s
->control_command
) {
3555 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3557 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3558 f
= SERVICE_SUCCESS
;
3561 unit_log_process_exit(
3564 service_exec_command_to_string(s
->control_command_id
),
3565 f
== SERVICE_SUCCESS
,
3568 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3571 if (s
->control_command
&&
3572 s
->control_command
->command_next
&&
3573 f
== SERVICE_SUCCESS
) {
3575 /* There is another command to *
3576 * execute, so let's do that. */
3578 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3579 service_run_next_control(s
);
3582 /* No further commands for this step, so let's
3583 * figure out what to do next */
3585 s
->control_command
= NULL
;
3586 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3588 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3592 case SERVICE_CONDITION
:
3593 if (f
== SERVICE_SUCCESS
)
3594 service_enter_start_pre(s
);
3596 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3599 case SERVICE_START_PRE
:
3600 if (f
== SERVICE_SUCCESS
)
3601 service_enter_start(s
);
3603 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3607 if (s
->type
!= SERVICE_FORKING
)
3608 /* Maybe spurious event due to a reload that changed the type? */
3611 if (f
!= SERVICE_SUCCESS
) {
3612 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3617 bool has_start_post
;
3620 /* Let's try to load the pid file here if we can.
3621 * The PID file might actually be created by a START_POST
3622 * script. In that case don't worry if the loading fails. */
3624 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3625 r
= service_load_pid_file(s
, !has_start_post
);
3626 if (!has_start_post
&& r
< 0) {
3627 r
= service_demand_pid_file(s
);
3628 if (r
< 0 || cgroup_good(s
) == 0)
3629 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3633 service_search_main_pid(s
);
3635 service_enter_start_post(s
);
3638 case SERVICE_START_POST
:
3639 if (f
!= SERVICE_SUCCESS
) {
3640 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3647 r
= service_load_pid_file(s
, true);
3649 r
= service_demand_pid_file(s
);
3650 if (r
< 0 || cgroup_good(s
) == 0)
3651 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3655 service_search_main_pid(s
);
3657 service_enter_running(s
, SERVICE_SUCCESS
);
3660 case SERVICE_RELOAD
:
3661 if (f
== SERVICE_SUCCESS
)
3662 if (service_load_pid_file(s
, true) < 0)
3663 service_search_main_pid(s
);
3665 s
->reload_result
= f
;
3666 service_enter_running(s
, SERVICE_SUCCESS
);
3670 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3673 case SERVICE_STOP_WATCHDOG
:
3674 case SERVICE_STOP_SIGTERM
:
3675 case SERVICE_STOP_SIGKILL
:
3676 if (main_pid_good(s
) <= 0)
3677 service_enter_stop_post(s
, f
);
3679 /* If there is still a service process around, wait until
3680 * that one quit, too */
3683 case SERVICE_STOP_POST
:
3684 if (main_pid_good(s
) <= 0)
3685 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3688 case SERVICE_FINAL_WATCHDOG
:
3689 case SERVICE_FINAL_SIGTERM
:
3690 case SERVICE_FINAL_SIGKILL
:
3691 if (main_pid_good(s
) <= 0)
3692 service_enter_dead(s
, f
, true);
3695 case SERVICE_CLEANING
:
3697 if (s
->clean_result
== SERVICE_SUCCESS
)
3698 s
->clean_result
= f
;
3700 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3704 assert_not_reached("Uh, control process died at wrong time.");
3707 } else /* Neither control nor main PID? If so, don't notify about anything */
3708 notify_dbus
= false;
3710 /* Notify clients about changed exit status */
3712 unit_add_to_dbus_queue(u
);
3714 /* We watch the main/control process otherwise we can't retrieve the unit they
3715 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3716 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3717 * detect when the cgroup becomes empty. Note that the control process is always
3718 * our child so it's pointless to watch all other processes. */
3719 if (!control_pid_good(s
))
3720 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3721 (void) unit_enqueue_rewatch_pids(u
);
3724 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3725 Service
*s
= SERVICE(userdata
);
3728 assert(source
== s
->timer_event_source
);
3732 case SERVICE_CONDITION
:
3733 case SERVICE_START_PRE
:
3735 case SERVICE_START_POST
:
3736 switch (s
->timeout_start_failure_mode
) {
3738 case SERVICE_TIMEOUT_TERMINATE
:
3739 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3740 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3743 case SERVICE_TIMEOUT_ABORT
:
3744 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
3745 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3748 case SERVICE_TIMEOUT_KILL
:
3749 if (s
->kill_context
.send_sigkill
) {
3750 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
3751 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3753 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
3754 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3759 assert_not_reached("unknown timeout mode");
3763 case SERVICE_RUNNING
:
3764 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3765 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3768 case SERVICE_RELOAD
:
3769 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3770 service_kill_control_process(s
);
3771 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3772 service_enter_running(s
, SERVICE_SUCCESS
);
3776 switch (s
->timeout_stop_failure_mode
) {
3778 case SERVICE_TIMEOUT_TERMINATE
:
3779 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3780 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3783 case SERVICE_TIMEOUT_ABORT
:
3784 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
3785 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3788 case SERVICE_TIMEOUT_KILL
:
3789 if (s
->kill_context
.send_sigkill
) {
3790 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
3791 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3793 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
3794 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3799 assert_not_reached("unknown timeout mode");
3803 case SERVICE_STOP_WATCHDOG
:
3804 if (s
->kill_context
.send_sigkill
) {
3805 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
3806 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3808 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
3809 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3813 case SERVICE_STOP_SIGTERM
:
3814 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3815 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
3816 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3817 } else if (s
->kill_context
.send_sigkill
) {
3818 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3819 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3821 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3822 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3827 case SERVICE_STOP_SIGKILL
:
3828 /* Uh, we sent a SIGKILL and it is still not gone?
3829 * Must be something we cannot kill, so let's just be
3830 * weirded out and continue */
3832 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3833 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3836 case SERVICE_STOP_POST
:
3837 switch (s
->timeout_stop_failure_mode
) {
3839 case SERVICE_TIMEOUT_TERMINATE
:
3840 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3841 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3844 case SERVICE_TIMEOUT_ABORT
:
3845 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
3846 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3849 case SERVICE_TIMEOUT_KILL
:
3850 if (s
->kill_context
.send_sigkill
) {
3851 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
3852 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3854 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
3855 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3860 assert_not_reached("unknown timeout mode");
3864 case SERVICE_FINAL_WATCHDOG
:
3865 if (s
->kill_context
.send_sigkill
) {
3866 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
3867 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3869 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
3870 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3874 case SERVICE_FINAL_SIGTERM
:
3875 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3876 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
3877 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3878 } else if (s
->kill_context
.send_sigkill
) {
3879 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
3880 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3882 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3883 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3888 case SERVICE_FINAL_SIGKILL
:
3889 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3890 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3893 case SERVICE_AUTO_RESTART
:
3894 if (s
->restart_usec
> 0) {
3895 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3896 log_unit_debug(UNIT(s
),
3897 "Service RestartSec=%s expired, scheduling restart.",
3898 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3900 log_unit_debug(UNIT(s
),
3901 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3903 service_enter_restart(s
);
3906 case SERVICE_CLEANING
:
3907 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3909 if (s
->clean_result
== SERVICE_SUCCESS
)
3910 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3912 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3916 assert_not_reached("Timeout at wrong time.");
3922 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3923 Service
*s
= SERVICE(userdata
);
3924 char t
[FORMAT_TIMESPAN_MAX
];
3925 usec_t watchdog_usec
;
3928 assert(source
== s
->watchdog_event_source
);
3930 watchdog_usec
= service_get_watchdog_usec(s
);
3932 if (UNIT(s
)->manager
->service_watchdogs
) {
3933 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3934 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3936 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3938 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3939 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3944 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
3947 if (s
->notify_access
== NOTIFY_NONE
) {
3948 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3952 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3953 if (s
->main_pid
!= 0)
3954 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
);
3956 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
);
3961 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3962 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3963 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
,
3964 pid
, s
->main_pid
, s
->control_pid
);
3965 else if (s
->main_pid
!= 0)
3966 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
);
3967 else if (s
->control_pid
!= 0)
3968 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
);
3970 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
);
3978 static void service_force_watchdog(Service
*s
) {
3979 if (!UNIT(s
)->manager
->service_watchdogs
)
3982 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3983 s
->status_text
? s
->status_text
: "<unset>");
3985 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3988 static void service_notify_message(
3990 const struct ucred
*ucred
,
3994 Service
*s
= SERVICE(u
);
3995 bool notify_dbus
= false;
4003 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, fds
))
4006 if (DEBUG_LOGGING
) {
4007 _cleanup_free_
char *cc
= NULL
;
4009 cc
= strv_join(tags
, ", ");
4010 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4013 /* Interpret MAINPID= */
4014 e
= strv_find_startswith(tags
, "MAINPID=");
4015 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
4018 if (parse_pid(e
, &new_main_pid
) < 0)
4019 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4020 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4022 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4024 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4026 if (ucred
->uid
== 0) {
4027 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
);
4030 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4033 service_set_main_pid(s
, new_main_pid
);
4035 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4037 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4044 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
4045 STRV_FOREACH_BACKWARDS(i
, tags
) {
4047 if (streq(*i
, "READY=1")) {
4048 s
->notify_state
= NOTIFY_READY
;
4050 /* Type=notify services inform us about completed
4051 * initialization with READY=1 */
4052 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
4053 service_enter_start_post(s
);
4055 /* Sending READY=1 while we are reloading informs us
4056 * that the reloading is complete */
4057 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
4058 service_enter_running(s
, SERVICE_SUCCESS
);
4063 } else if (streq(*i
, "RELOADING=1")) {
4064 s
->notify_state
= NOTIFY_RELOADING
;
4066 if (s
->state
== SERVICE_RUNNING
)
4067 service_enter_reload_by_notify(s
);
4072 } else if (streq(*i
, "STOPPING=1")) {
4073 s
->notify_state
= NOTIFY_STOPPING
;
4075 if (s
->state
== SERVICE_RUNNING
)
4076 service_enter_stop_by_notify(s
);
4083 /* Interpret STATUS= */
4084 e
= strv_find_startswith(tags
, "STATUS=");
4086 _cleanup_free_
char *t
= NULL
;
4089 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4090 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4091 if (strlen(e
) > STATUS_TEXT_MAX
)
4092 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4093 else if (!utf8_is_valid(e
))
4094 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4102 if (!streq_ptr(s
->status_text
, t
)) {
4103 free_and_replace(s
->status_text
, t
);
4108 /* Interpret ERRNO= */
4109 e
= strv_find_startswith(tags
, "ERRNO=");
4113 status_errno
= parse_errno(e
);
4114 if (status_errno
< 0)
4115 log_unit_warning_errno(u
, status_errno
,
4116 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4117 else if (s
->status_errno
!= status_errno
) {
4118 s
->status_errno
= status_errno
;
4123 /* Interpret EXTEND_TIMEOUT= */
4124 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4126 usec_t extend_timeout_usec
;
4127 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4128 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4130 service_extend_timeout(s
, extend_timeout_usec
);
4133 /* Interpret WATCHDOG= */
4134 e
= strv_find_startswith(tags
, "WATCHDOG=");
4137 service_reset_watchdog(s
);
4138 else if (streq(e
, "trigger"))
4139 service_force_watchdog(s
);
4141 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4144 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4146 usec_t watchdog_override_usec
;
4147 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4148 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4150 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4153 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4154 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4155 * fds, but optional when pushing in new fds, for compatibility reasons. */
4156 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4159 name
= strv_find_startswith(tags
, "FDNAME=");
4160 if (!name
|| !fdname_is_valid(name
))
4161 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4163 service_remove_fd_store(s
, name
);
4165 } else if (strv_find(tags
, "FDSTORE=1")) {
4168 name
= strv_find_startswith(tags
, "FDNAME=");
4169 if (name
&& !fdname_is_valid(name
)) {
4170 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4174 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4177 /* Notify clients about changed status or main pid */
4179 unit_add_to_dbus_queue(u
);
4182 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4183 Service
*s
= SERVICE(u
);
4187 if (!s
->timer_event_source
)
4190 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4193 if (t
== USEC_INFINITY
)
4200 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4202 Service
*s
= SERVICE(u
);
4208 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4210 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4212 s
->bus_name_good
= !!new_owner
;
4214 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4215 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4217 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4221 if (s
->type
== SERVICE_DBUS
) {
4223 /* service_enter_running() will figure out what to
4225 if (s
->state
== SERVICE_RUNNING
)
4226 service_enter_running(s
, SERVICE_SUCCESS
);
4227 else if (s
->state
== SERVICE_START
&& new_owner
)
4228 service_enter_start_post(s
);
4230 } else if (new_owner
&&
4238 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4241 /* Try to acquire PID from bus service */
4243 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4245 r
= sd_bus_creds_get_pid(creds
, &pid
);
4247 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4249 service_set_main_pid(s
, pid
);
4250 unit_watch_pid(UNIT(s
), pid
, false);
4255 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4256 _cleanup_free_
char *peer
= NULL
;
4262 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4263 * to be configured. We take ownership of the passed fd on success. */
4265 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4268 if (s
->socket_fd
>= 0)
4271 if (s
->state
!= SERVICE_DEAD
)
4274 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4276 if (UNIT(s
)->description
) {
4277 _cleanup_free_
char *a
;
4279 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4283 r
= unit_set_description(UNIT(s
), a
);
4285 r
= unit_set_description(UNIT(s
), peer
);
4291 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4296 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4298 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4302 static void service_reset_failed(Unit
*u
) {
4303 Service
*s
= SERVICE(u
);
4307 if (s
->state
== SERVICE_FAILED
)
4308 service_set_state(s
, SERVICE_DEAD
);
4310 s
->result
= SERVICE_SUCCESS
;
4311 s
->reload_result
= SERVICE_SUCCESS
;
4312 s
->clean_result
= SERVICE_SUCCESS
;
4314 s
->flush_n_restarts
= false;
4317 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4318 Service
*s
= SERVICE(u
);
4322 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4325 static int service_main_pid(Unit
*u
) {
4326 Service
*s
= SERVICE(u
);
4333 static int service_control_pid(Unit
*u
) {
4334 Service
*s
= SERVICE(u
);
4338 return s
->control_pid
;
4341 static bool service_needs_console(Unit
*u
) {
4342 Service
*s
= SERVICE(u
);
4346 /* We provide our own implementation of this here, instead of relying of the generic implementation
4347 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4349 if (!exec_context_may_touch_console(&s
->exec_context
))
4352 return IN_SET(s
->state
,
4360 SERVICE_STOP_WATCHDOG
,
4361 SERVICE_STOP_SIGTERM
,
4362 SERVICE_STOP_SIGKILL
,
4364 SERVICE_FINAL_WATCHDOG
,
4365 SERVICE_FINAL_SIGTERM
,
4366 SERVICE_FINAL_SIGKILL
);
4369 static int service_exit_status(Unit
*u
) {
4370 Service
*s
= SERVICE(u
);
4374 if (s
->main_exec_status
.pid
<= 0 ||
4375 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4378 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4381 return s
->main_exec_status
.status
;
4384 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4385 _cleanup_strv_free_
char **l
= NULL
;
4386 Service
*s
= SERVICE(u
);
4392 if (s
->state
!= SERVICE_DEAD
)
4395 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4399 if (strv_isempty(l
))
4402 service_unwatch_control_pid(s
);
4403 s
->clean_result
= SERVICE_SUCCESS
;
4404 s
->control_command
= NULL
;
4405 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4407 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4411 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4415 service_set_state(s
, SERVICE_CLEANING
);
4420 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4421 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4422 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4426 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4427 Service
*s
= SERVICE(u
);
4431 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4434 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4435 if (t
== JOB_START
&& result
== JOB_DONE
) {
4436 Service
*s
= SERVICE(u
);
4438 if (s
->type
== SERVICE_ONESHOT
)
4439 return "Finished %s.";
4442 /* Fall back to generic */
4446 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4447 [SERVICE_RESTART_NO
] = "no",
4448 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4449 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4450 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4451 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4452 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4453 [SERVICE_RESTART_ALWAYS
] = "always",
4456 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4458 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4459 [SERVICE_SIMPLE
] = "simple",
4460 [SERVICE_FORKING
] = "forking",
4461 [SERVICE_ONESHOT
] = "oneshot",
4462 [SERVICE_DBUS
] = "dbus",
4463 [SERVICE_NOTIFY
] = "notify",
4464 [SERVICE_IDLE
] = "idle",
4465 [SERVICE_EXEC
] = "exec",
4468 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4470 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4471 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4472 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4473 [SERVICE_EXEC_START
] = "ExecStart",
4474 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4475 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4476 [SERVICE_EXEC_STOP
] = "ExecStop",
4477 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4480 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4482 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4483 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4484 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4485 [SERVICE_EXEC_START
] = "ExecStartEx",
4486 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4487 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4488 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4489 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4492 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4494 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4495 [NOTIFY_UNKNOWN
] = "unknown",
4496 [NOTIFY_READY
] = "ready",
4497 [NOTIFY_RELOADING
] = "reloading",
4498 [NOTIFY_STOPPING
] = "stopping",
4501 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4503 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4504 [SERVICE_SUCCESS
] = "success",
4505 [SERVICE_FAILURE_RESOURCES
] = "resources",
4506 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4507 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4508 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4509 [SERVICE_FAILURE_SIGNAL
] = "signal",
4510 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4511 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4512 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4513 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4514 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4517 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4519 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
4520 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
4521 [SERVICE_TIMEOUT_ABORT
] = "abort",
4522 [SERVICE_TIMEOUT_KILL
] = "kill",
4525 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
4527 const UnitVTable service_vtable
= {
4528 .object_size
= sizeof(Service
),
4529 .exec_context_offset
= offsetof(Service
, exec_context
),
4530 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4531 .kill_context_offset
= offsetof(Service
, kill_context
),
4532 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4533 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4539 .private_section
= "Service",
4541 .can_transient
= true,
4542 .can_delegate
= true,
4545 .init
= service_init
,
4546 .done
= service_done
,
4547 .load
= service_load
,
4548 .release_resources
= service_release_resources
,
4550 .coldplug
= service_coldplug
,
4552 .dump
= service_dump
,
4554 .start
= service_start
,
4555 .stop
= service_stop
,
4556 .reload
= service_reload
,
4558 .can_reload
= service_can_reload
,
4560 .kill
= service_kill
,
4561 .clean
= service_clean
,
4562 .can_clean
= service_can_clean
,
4564 .freeze
= unit_freeze_vtable_common
,
4565 .thaw
= unit_thaw_vtable_common
,
4567 .serialize
= service_serialize
,
4568 .deserialize_item
= service_deserialize_item
,
4570 .active_state
= service_active_state
,
4571 .sub_state_to_string
= service_sub_state_to_string
,
4573 .will_restart
= service_will_restart
,
4575 .may_gc
= service_may_gc
,
4577 .sigchld_event
= service_sigchld_event
,
4579 .reset_failed
= service_reset_failed
,
4581 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4582 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4583 .notify_message
= service_notify_message
,
4585 .main_pid
= service_main_pid
,
4586 .control_pid
= service_control_pid
,
4588 .bus_name_owner_change
= service_bus_name_owner_change
,
4590 .bus_set_property
= bus_service_set_property
,
4591 .bus_commit_properties
= bus_service_commit_properties
,
4593 .get_timeout
= service_get_timeout
,
4594 .needs_console
= service_needs_console
,
4595 .exit_status
= service_exit_status
,
4597 .status_message_formats
= {
4598 .starting_stopping
= {
4599 [0] = "Starting %s...",
4600 [1] = "Stopping %s...",
4602 .finished_start_job
= {
4603 [JOB_FAILED
] = "Failed to start %s.",
4604 [JOB_SKIPPED
] = "Skipped %s.",
4606 .finished_stop_job
= {
4607 [JOB_DONE
] = "Stopped %s.",
4608 [JOB_FAILED
] = "Stopped (with error) %s.",
4610 .finished_job
= service_finished_job
,