1 /* SPDX-License-Identifier: LGPL-2.1+ */
7 #include "sd-messages.h"
9 #include "alloc-util.h"
11 #include "bus-error.h"
12 #include "bus-kernel.h"
14 #include "dbus-service.h"
18 #include "exit-status.h"
21 #include "format-util.h"
23 #include "load-dropin.h"
24 #include "load-fragment.h"
27 #include "parse-util.h"
28 #include "path-util.h"
29 #include "process-util.h"
31 #include "signal-util.h"
33 #include "stdio-util.h"
34 #include "string-table.h"
35 #include "string-util.h"
37 #include "unit-name.h"
42 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
43 [SERVICE_DEAD
] = UNIT_INACTIVE
,
44 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
45 [SERVICE_START
] = UNIT_ACTIVATING
,
46 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
47 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
48 [SERVICE_EXITED
] = UNIT_ACTIVE
,
49 [SERVICE_RELOAD
] = UNIT_RELOADING
,
50 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
51 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
52 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
53 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
54 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
55 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
56 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
57 [SERVICE_FAILED
] = UNIT_FAILED
,
58 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
61 /* For Type=idle we never want to delay any other jobs, hence we
62 * consider idle jobs active as soon as we start working on them */
63 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
64 [SERVICE_DEAD
] = UNIT_INACTIVE
,
65 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
66 [SERVICE_START
] = UNIT_ACTIVE
,
67 [SERVICE_START_POST
] = UNIT_ACTIVE
,
68 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
69 [SERVICE_EXITED
] = UNIT_ACTIVE
,
70 [SERVICE_RELOAD
] = UNIT_RELOADING
,
71 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
72 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
73 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
74 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
75 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
76 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
77 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
78 [SERVICE_FAILED
] = UNIT_FAILED
,
79 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
82 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
83 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
84 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
85 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
87 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
88 static void service_enter_reload_by_notify(Service
*s
);
90 static void service_init(Unit
*u
) {
91 Service
*s
= SERVICE(u
);
94 assert(u
->load_state
== UNIT_STUB
);
96 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
97 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
98 s
->restart_usec
= u
->manager
->default_restart_usec
;
99 s
->runtime_max_usec
= USEC_INFINITY
;
100 s
->type
= _SERVICE_TYPE_INVALID
;
102 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
103 s
->guess_main_pid
= true;
105 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
107 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
108 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
111 static void service_unwatch_control_pid(Service
*s
) {
114 if (s
->control_pid
<= 0)
117 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
121 static void service_unwatch_main_pid(Service
*s
) {
124 if (s
->main_pid
<= 0)
127 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
131 static void service_unwatch_pid_file(Service
*s
) {
132 if (!s
->pid_file_pathspec
)
135 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
136 path_spec_unwatch(s
->pid_file_pathspec
);
137 path_spec_done(s
->pid_file_pathspec
);
138 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
141 static int service_set_main_pid(Service
*s
, pid_t pid
) {
149 if (pid
== getpid_cached())
152 if (s
->main_pid
== pid
&& s
->main_pid_known
)
155 if (s
->main_pid
!= pid
) {
156 service_unwatch_main_pid(s
);
157 exec_status_start(&s
->main_exec_status
, pid
);
161 s
->main_pid_known
= true;
163 if (get_process_ppid(pid
, &ppid
) >= 0 && ppid
!= getpid_cached()) {
164 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
165 s
->main_pid_alien
= true;
167 s
->main_pid_alien
= false;
172 void service_close_socket_fd(Service
*s
) {
175 /* Undo the effect of service_set_socket_fd(). */
177 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
179 if (UNIT_ISSET(s
->accept_socket
)) {
180 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
181 unit_ref_unset(&s
->accept_socket
);
185 static void service_stop_watchdog(Service
*s
) {
188 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
189 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
192 static usec_t
service_get_watchdog_usec(Service
*s
) {
195 if (s
->watchdog_override_enable
)
196 return s
->watchdog_override_usec
;
198 return s
->watchdog_usec
;
201 static void service_start_watchdog(Service
*s
) {
203 usec_t watchdog_usec
;
207 watchdog_usec
= service_get_watchdog_usec(s
);
208 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
))
211 if (s
->watchdog_event_source
) {
212 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
214 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
218 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
220 r
= sd_event_add_time(
221 UNIT(s
)->manager
->event
,
222 &s
->watchdog_event_source
,
224 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
225 service_dispatch_watchdog
, s
);
227 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
231 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
233 /* Let's process everything else which might be a sign
234 * of living before we consider a service died. */
235 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
239 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
242 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
245 if (s
->timer_event_source
) {
246 uint64_t current
= 0, extended
= 0;
249 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
252 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
254 r
= sd_event_source_get_time(s
->timer_event_source
, ¤t
);
256 log_unit_error_errno(UNIT(s
), r
, "Failed to retrieve timeout timer: %m");
257 else if (extended
> current
) {
258 r
= sd_event_source_set_time(s
->timer_event_source
, extended
);
260 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout timer: %m");
263 if (s
->watchdog_event_source
) {
264 /* extend watchdog if necessary. We've asked for an extended timeout so we
265 * shouldn't expect a watchdog timeout in the interval in between */
266 r
= sd_event_source_get_time(s
->watchdog_event_source
, ¤t
);
268 log_unit_error_errno(UNIT(s
), r
, "Failed to retrieve watchdog timer: %m");
272 if (extended
> current
) {
273 r
= sd_event_source_set_time(s
->watchdog_event_source
, extended
);
275 log_unit_warning_errno(UNIT(s
), r
, "Failed to set watchdog timer: %m");
281 static void service_reset_watchdog(Service
*s
) {
284 dual_timestamp_get(&s
->watchdog_timestamp
);
285 service_start_watchdog(s
);
288 static void service_reset_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
291 s
->watchdog_override_enable
= true;
292 s
->watchdog_override_usec
= watchdog_override_usec
;
293 service_reset_watchdog(s
);
295 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
296 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
299 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
305 assert(fs
->service
->n_fd_store
> 0);
306 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
307 fs
->service
->n_fd_store
--;
310 if (fs
->event_source
) {
311 sd_event_source_set_enabled(fs
->event_source
, SD_EVENT_OFF
);
312 sd_event_source_unref(fs
->event_source
);
320 static void service_release_fd_store(Service
*s
) {
323 if (s
->n_keep_fd_store
> 0)
326 log_unit_debug(UNIT(s
), "Releasing all stored fds");
328 service_fd_store_unlink(s
->fd_store
);
330 assert(s
->n_fd_store
== 0);
333 static void service_release_resources(Unit
*u
) {
334 Service
*s
= SERVICE(u
);
338 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
341 log_unit_debug(u
, "Releasing resources.");
343 s
->stdin_fd
= safe_close(s
->stdin_fd
);
344 s
->stdout_fd
= safe_close(s
->stdout_fd
);
345 s
->stderr_fd
= safe_close(s
->stderr_fd
);
347 service_release_fd_store(s
);
350 static void service_done(Unit
*u
) {
351 Service
*s
= SERVICE(u
);
355 s
->pid_file
= mfree(s
->pid_file
);
356 s
->status_text
= mfree(s
->status_text
);
358 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
359 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
360 s
->control_command
= NULL
;
361 s
->main_command
= NULL
;
363 dynamic_creds_unref(&s
->dynamic_creds
);
365 exit_status_set_free(&s
->restart_prevent_status
);
366 exit_status_set_free(&s
->restart_force_status
);
367 exit_status_set_free(&s
->success_status
);
369 /* This will leak a process, but at least no memory or any of
371 service_unwatch_main_pid(s
);
372 service_unwatch_control_pid(s
);
373 service_unwatch_pid_file(s
);
376 unit_unwatch_bus_name(u
, s
->bus_name
);
377 s
->bus_name
= mfree(s
->bus_name
);
380 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
382 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
383 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
385 service_close_socket_fd(s
);
386 s
->peer
= socket_peer_unref(s
->peer
);
388 unit_ref_unset(&s
->accept_socket
);
390 service_stop_watchdog(s
);
392 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
393 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
395 service_release_resources(u
);
398 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
399 ServiceFDStore
*fs
= userdata
;
404 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
405 log_unit_debug(UNIT(fs
->service
),
406 "Received %s on stored fd %d (%s), closing.",
407 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
408 fs
->fd
, strna(fs
->fdname
));
409 service_fd_store_unlink(fs
);
413 static int service_add_fd_store(Service
*s
, int fd
, const char *name
) {
417 /* fd is always consumed if we return >= 0 */
422 if (s
->n_fd_store
>= s
->n_fd_store_max
)
423 return -EXFULL
; /* Our store is full.
424 * Use this errno rather than E[NM]FILE to distinguish from
425 * the case where systemd itself hits the file limit. */
427 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
428 r
= same_fd(fs
->fd
, fd
);
433 return 0; /* fd already included */
437 fs
= new0(ServiceFDStore
, 1);
443 fs
->fdname
= strdup(name
?: "stored");
449 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
450 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
455 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
457 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
460 return 1; /* fd newly stored */
463 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
) {
468 while (fdset_size(fds
) > 0) {
469 _cleanup_close_
int fd
= -1;
471 fd
= fdset_steal_first(fds
);
475 r
= service_add_fd_store(s
, fd
, name
);
477 return log_unit_warning_errno(UNIT(s
), r
,
478 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
481 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
483 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
490 static void service_remove_fd_store(Service
*s
, const char *name
) {
491 ServiceFDStore
*fs
, *n
;
496 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
497 if (!streq(fs
->fdname
, name
))
500 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
501 service_fd_store_unlink(fs
);
505 static int service_arm_timer(Service
*s
, usec_t usec
) {
510 if (s
->timer_event_source
) {
511 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
515 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
518 if (usec
== USEC_INFINITY
)
521 r
= sd_event_add_time(
522 UNIT(s
)->manager
->event
,
523 &s
->timer_event_source
,
526 service_dispatch_timer
, s
);
530 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
535 static int service_verify(Service
*s
) {
538 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
541 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
]
542 && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
543 /* FailureAction= only makes sense if one of the start or stop commands is specified.
544 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
545 * either a command or SuccessAction= are required. */
547 log_unit_error(UNIT(s
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
551 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
552 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
556 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
) {
557 log_unit_error(UNIT(s
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
561 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
562 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
566 if (s
->type
== SERVICE_ONESHOT
&& s
->restart
!= SERVICE_RESTART_NO
) {
567 log_unit_error(UNIT(s
), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
571 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
572 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
576 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
577 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
581 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
582 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
584 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
585 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
589 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
590 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
592 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
593 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
595 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
596 log_unit_warning(UNIT(s
), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
601 static int service_add_default_dependencies(Service
*s
) {
606 if (!UNIT(s
)->default_dependencies
)
609 /* Add a number of automatic dependencies useful for the
610 * majority of services. */
612 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
613 /* First, pull in the really early boot stuff, and
614 * require it, so that we fail if we can't acquire
617 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
622 /* In the --user instance there's no sysinit.target,
623 * in that case require basic.target instead. */
625 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
630 /* Second, if the rest of the base system is in the same
631 * transaction, order us after it, but do not pull it in or
632 * even require it. */
633 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
637 /* Third, add us in for normal shutdown. */
638 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
641 static void service_fix_output(Service
*s
) {
644 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
645 * however, since in that case we want output to default to the same place as we read input from. */
647 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
648 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
649 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
650 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
652 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
653 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
654 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
656 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
657 s
->exec_context
.stdin_data_size
> 0)
658 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
661 static int service_setup_bus_name(Service
*s
) {
669 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
671 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
673 /* We always want to be ordered against dbus.socket if both are in the transaction. */
674 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
676 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
678 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
680 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
682 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
687 static int service_add_extras(Service
*s
) {
692 if (s
->type
== _SERVICE_TYPE_INVALID
) {
693 /* Figure out a type automatically */
695 s
->type
= SERVICE_DBUS
;
696 else if (s
->exec_command
[SERVICE_EXEC_START
])
697 s
->type
= SERVICE_SIMPLE
;
699 s
->type
= SERVICE_ONESHOT
;
702 /* Oneshot services have disabled start timeout by default */
703 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
704 s
->timeout_start_usec
= USEC_INFINITY
;
706 service_fix_output(s
);
708 r
= unit_patch_contexts(UNIT(s
));
712 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
716 r
= unit_set_default_slice(UNIT(s
));
720 /* If the service needs the notify socket, let's enable it automatically. */
721 if (s
->notify_access
== NOTIFY_NONE
&&
722 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
723 s
->notify_access
= NOTIFY_MAIN
;
725 r
= service_add_default_dependencies(s
);
729 r
= service_setup_bus_name(s
);
736 static int service_load(Unit
*u
) {
737 Service
*s
= SERVICE(u
);
742 /* Load a .service file */
743 r
= unit_load_fragment(u
);
747 /* Still nothing found? Then let's give up */
748 if (u
->load_state
== UNIT_STUB
)
751 /* This is a new unit? Then let's add in some extras */
752 if (u
->load_state
== UNIT_LOADED
) {
754 /* We were able to load something, then let's add in
755 * the dropin directories. */
756 r
= unit_load_dropin(u
);
760 /* This is a new unit? Then let's add in some
762 r
= service_add_extras(s
);
767 return service_verify(s
);
770 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
771 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
];
772 char buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
];
773 ServiceExecCommand c
;
774 Service
*s
= SERVICE(u
);
779 prefix
= strempty(prefix
);
780 prefix2
= strjoina(prefix
, "\t");
783 "%sService State: %s\n"
785 "%sReload Result: %s\n"
786 "%sPermissionsStartOnly: %s\n"
787 "%sRootDirectoryStartOnly: %s\n"
788 "%sRemainAfterExit: %s\n"
789 "%sGuessMainPID: %s\n"
792 "%sNotifyAccess: %s\n"
793 "%sNotifyState: %s\n",
794 prefix
, service_state_to_string(s
->state
),
795 prefix
, service_result_to_string(s
->result
),
796 prefix
, service_result_to_string(s
->reload_result
),
797 prefix
, yes_no(s
->permissions_start_only
),
798 prefix
, yes_no(s
->root_directory_start_only
),
799 prefix
, yes_no(s
->remain_after_exit
),
800 prefix
, yes_no(s
->guess_main_pid
),
801 prefix
, service_type_to_string(s
->type
),
802 prefix
, service_restart_to_string(s
->restart
),
803 prefix
, notify_access_to_string(s
->notify_access
),
804 prefix
, notify_state_to_string(s
->notify_state
));
806 if (s
->control_pid
> 0)
808 "%sControl PID: "PID_FMT
"\n",
809 prefix
, s
->control_pid
);
813 "%sMain PID: "PID_FMT
"\n"
814 "%sMain PID Known: %s\n"
815 "%sMain PID Alien: %s\n",
817 prefix
, yes_no(s
->main_pid_known
),
818 prefix
, yes_no(s
->main_pid_alien
));
823 prefix
, s
->pid_file
);
828 "%sBus Name Good: %s\n",
830 prefix
, yes_no(s
->bus_name_good
));
832 if (UNIT_ISSET(s
->accept_socket
))
834 "%sAccept Socket: %s\n",
835 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
839 "%sTimeoutStartSec: %s\n"
840 "%sTimeoutStopSec: %s\n"
841 "%sRuntimeMaxSec: %s\n"
842 "%sWatchdogSec: %s\n",
843 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
844 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
845 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
846 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
847 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
849 kill_context_dump(&s
->kill_context
, f
, prefix
);
850 exec_context_dump(&s
->exec_context
, f
, prefix
);
852 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
854 if (!s
->exec_command
[c
])
857 fprintf(f
, "%s-> %s:\n",
858 prefix
, service_exec_command_to_string(c
));
860 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
864 fprintf(f
, "%sStatus Text: %s\n",
865 prefix
, s
->status_text
);
867 if (s
->n_fd_store_max
> 0)
869 "%sFile Descriptor Store Max: %u\n"
870 "%sFile Descriptor Store Current: %zu\n",
871 prefix
, s
->n_fd_store_max
,
872 prefix
, s
->n_fd_store
);
874 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
877 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
881 assert(pid_is_valid(pid
));
883 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
884 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
887 if (pid
== getpid_cached() || pid
== 1) {
888 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
892 if (pid
== s
->control_pid
) {
893 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
897 if (!pid_is_alive(pid
)) {
898 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
902 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
903 if (owner
== UNIT(s
)) {
904 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
905 return 1; /* Yay, it's definitely a good PID */
908 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
911 static int service_load_pid_file(Service
*s
, bool may_warn
) {
912 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
913 bool questionable_pid_file
= false;
914 _cleanup_free_
char *k
= NULL
;
915 _cleanup_close_
int fd
= -1;
924 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
926 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
928 log_unit_full(UNIT(s
), LOG_DEBUG
, fd
, "Permission denied while opening PID file or potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
930 questionable_pid_file
= true;
932 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
935 return log_unit_full(UNIT(s
), prio
, fd
, "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
937 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd chase_symlinks() returned us into a proper fd first. */
938 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
939 r
= read_one_line_file(procfs
, &k
);
941 return log_unit_error_errno(UNIT(s
), r
, "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m", s
->pid_file
);
943 r
= parse_pid(k
, &pid
);
945 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
947 if (s
->main_pid_known
&& pid
== s
->main_pid
)
950 r
= service_is_suitable_main_pid(s
, pid
, prio
);
956 if (questionable_pid_file
) {
957 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
961 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
963 if (fstat(fd
, &st
) < 0)
964 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
966 if (st
.st_uid
!= 0) {
967 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
);
971 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
);
974 if (s
->main_pid_known
) {
975 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
977 service_unwatch_main_pid(s
);
978 s
->main_pid_known
= false;
980 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
982 r
= service_set_main_pid(s
, pid
);
986 r
= unit_watch_pid(UNIT(s
), pid
);
987 if (r
< 0) /* FIXME: we need to do something here */
988 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
993 static void service_search_main_pid(Service
*s
) {
999 /* If we know it anyway, don't ever fallback to unreliable
1001 if (s
->main_pid_known
)
1004 if (!s
->guess_main_pid
)
1007 assert(s
->main_pid
<= 0);
1009 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1012 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1013 if (service_set_main_pid(s
, pid
) < 0)
1016 r
= unit_watch_pid(UNIT(s
), pid
);
1018 /* FIXME: we need to do something here */
1019 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1022 static void service_set_state(Service
*s
, ServiceState state
) {
1023 ServiceState old_state
;
1024 const UnitActiveState
*table
;
1028 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1030 old_state
= s
->state
;
1033 service_unwatch_pid_file(s
);
1036 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1039 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1040 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1041 SERVICE_AUTO_RESTART
))
1042 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1045 SERVICE_START
, SERVICE_START_POST
,
1046 SERVICE_RUNNING
, SERVICE_RELOAD
,
1047 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1048 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1049 service_unwatch_main_pid(s
);
1050 s
->main_command
= NULL
;
1054 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1056 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1057 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1058 service_unwatch_control_pid(s
);
1059 s
->control_command
= NULL
;
1060 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1063 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1064 unit_unwatch_all_pids(UNIT(s
));
1065 unit_dequeue_rewatch_pids(UNIT(s
));
1069 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1070 SERVICE_RUNNING
, SERVICE_RELOAD
,
1071 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1072 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1073 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1074 service_close_socket_fd(s
);
1076 if (state
!= SERVICE_START
)
1077 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1079 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1080 service_stop_watchdog(s
);
1082 /* For the inactive states unit_notify() will trim the cgroup,
1083 * but for exit we have to do that ourselves... */
1084 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1085 unit_prune_cgroup(UNIT(s
));
1087 if (old_state
!= state
)
1088 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1090 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1091 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1092 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1095 static usec_t
service_coldplug_timeout(Service
*s
) {
1098 switch (s
->deserialized_state
) {
1100 case SERVICE_START_PRE
:
1102 case SERVICE_START_POST
:
1103 case SERVICE_RELOAD
:
1104 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1106 case SERVICE_RUNNING
:
1107 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1110 case SERVICE_STOP_WATCHDOG
:
1111 case SERVICE_STOP_SIGTERM
:
1112 case SERVICE_STOP_SIGKILL
:
1113 case SERVICE_STOP_POST
:
1114 case SERVICE_FINAL_SIGTERM
:
1115 case SERVICE_FINAL_SIGKILL
:
1116 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1118 case SERVICE_AUTO_RESTART
:
1119 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1122 return USEC_INFINITY
;
1126 static int service_coldplug(Unit
*u
) {
1127 Service
*s
= SERVICE(u
);
1131 assert(s
->state
== SERVICE_DEAD
);
1133 if (s
->deserialized_state
== s
->state
)
1136 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1140 if (s
->main_pid
> 0 &&
1141 pid_is_unwaited(s
->main_pid
) &&
1142 (IN_SET(s
->deserialized_state
,
1143 SERVICE_START
, SERVICE_START_POST
,
1144 SERVICE_RUNNING
, SERVICE_RELOAD
,
1145 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1146 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1147 r
= unit_watch_pid(UNIT(s
), s
->main_pid
);
1152 if (s
->control_pid
> 0 &&
1153 pid_is_unwaited(s
->control_pid
) &&
1154 IN_SET(s
->deserialized_state
,
1155 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1157 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1158 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1159 r
= unit_watch_pid(UNIT(s
), s
->control_pid
);
1164 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1165 (void) unit_enqueue_rewatch_pids(u
);
1166 (void) unit_setup_dynamic_creds(u
);
1167 (void) unit_setup_exec_runtime(u
);
1170 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1171 service_start_watchdog(s
);
1173 if (UNIT_ISSET(s
->accept_socket
)) {
1174 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1176 if (socket
->max_connections_per_source
> 0) {
1179 /* Make a best-effort attempt at bumping the connection count */
1180 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1181 socket_peer_unref(s
->peer
);
1187 service_set_state(s
, s
->deserialized_state
);
1191 static int service_collect_fds(
1195 size_t *n_socket_fds
,
1196 size_t *n_storage_fds
) {
1198 _cleanup_strv_free_
char **rfd_names
= NULL
;
1199 _cleanup_free_
int *rfds
= NULL
;
1200 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1206 assert(n_socket_fds
);
1207 assert(n_storage_fds
);
1209 if (s
->socket_fd
>= 0) {
1211 /* Pass the per-connection socket */
1216 rfds
[0] = s
->socket_fd
;
1218 rfd_names
= strv_new("connection", NULL
);
1228 /* Pass all our configured sockets for singleton services */
1230 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1231 _cleanup_free_
int *cfds
= NULL
;
1235 if (u
->type
!= UNIT_SOCKET
)
1240 cn_fds
= socket_collect_fds(sock
, &cfds
);
1248 rfds
= TAKE_PTR(cfds
);
1249 rn_socket_fds
= cn_fds
;
1253 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1257 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1260 rn_socket_fds
+= cn_fds
;
1263 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1269 if (s
->n_fd_store
> 0) {
1275 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1281 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1286 n_fds
= rn_socket_fds
;
1288 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1289 rfds
[n_fds
] = fs
->fd
;
1290 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1291 if (!rfd_names
[n_fds
])
1298 rfd_names
[n_fds
] = NULL
;
1301 *fds
= TAKE_PTR(rfds
);
1302 *fd_names
= TAKE_PTR(rfd_names
);
1303 *n_socket_fds
= rn_socket_fds
;
1304 *n_storage_fds
= rn_storage_fds
;
1309 static int service_allocate_exec_fd_event_source(
1312 sd_event_source
**ret_event_source
) {
1314 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1319 assert(ret_event_source
);
1321 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1323 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1325 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1327 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1329 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1331 (void) sd_event_source_set_description(source
, "service event_fd");
1333 r
= sd_event_source_set_io_fd_own(source
, true);
1335 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1337 *ret_event_source
= TAKE_PTR(source
);
1341 static int service_allocate_exec_fd(
1343 sd_event_source
**ret_event_source
,
1346 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1350 assert(ret_event_source
);
1351 assert(ret_exec_fd
);
1353 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1354 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1356 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1361 *ret_exec_fd
= TAKE_FD(p
[1]);
1366 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1369 /* Notifications are accepted depending on the process and
1370 * the access setting of the service:
1371 * process: \ access: NONE MAIN EXEC ALL
1372 * main no yes yes yes
1373 * control no no yes yes
1374 * other (forked) no no no yes */
1376 if (flags
& EXEC_IS_CONTROL
)
1377 /* A control process */
1378 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1380 /* We only spawn main processes and control processes, so any
1381 * process that is not a control process is a main process */
1382 return s
->notify_access
!= NOTIFY_NONE
;
1385 static int service_spawn(
1392 ExecParameters exec_params
= {
1399 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1400 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1401 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1402 _cleanup_close_
int exec_fd
= -1;
1403 _cleanup_free_
int *fds
= NULL
;
1411 r
= unit_prepare_exec(UNIT(s
));
1415 if (flags
& EXEC_IS_CONTROL
) {
1416 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1417 if (s
->permissions_start_only
)
1418 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1419 if (s
->root_directory_start_only
)
1420 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1423 if ((flags
& EXEC_PASS_FDS
) ||
1424 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1425 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1426 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1428 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1432 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1435 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1436 assert(!s
->exec_fd_event_source
);
1438 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1443 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1447 our_env
= new0(char*, 9);
1451 if (service_exec_needs_notify_socket(s
, flags
))
1452 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1455 if (s
->main_pid
> 0)
1456 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1459 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1460 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1463 if (s
->socket_fd
>= 0) {
1464 union sockaddr_union sa
;
1465 socklen_t salen
= sizeof(sa
);
1467 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1468 * useful. Note that we do this only when we are still connected at this point in time, which we might
1469 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1470 * in ENOTCONN), and just use whate we can use. */
1472 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1473 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1475 _cleanup_free_
char *addr
= NULL
;
1479 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1483 t
= strappend("REMOTE_ADDR=", addr
);
1486 our_env
[n_env
++] = t
;
1488 r
= sockaddr_port(&sa
.sa
, &port
);
1492 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1494 our_env
[n_env
++] = t
;
1498 if (flags
& EXEC_SETENV_RESULT
) {
1499 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1502 if (s
->main_exec_status
.pid
> 0 &&
1503 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1504 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1507 if (s
->main_exec_status
.code
== CLD_EXITED
)
1508 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1510 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1516 unit_set_exec_params(UNIT(s
), &exec_params
);
1518 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1522 /* System services should get a new keyring by default. */
1523 SET_FLAG(exec_params
.flags
, EXEC_NEW_KEYRING
, MANAGER_IS_SYSTEM(UNIT(s
)->manager
));
1525 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1526 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1527 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1529 exec_params
.environment
= final_env
;
1530 exec_params
.fds
= fds
;
1531 exec_params
.fd_names
= fd_names
;
1532 exec_params
.n_socket_fds
= n_socket_fds
;
1533 exec_params
.n_storage_fds
= n_storage_fds
;
1534 exec_params
.watchdog_usec
= s
->watchdog_usec
;
1535 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1536 if (s
->type
== SERVICE_IDLE
)
1537 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1538 exec_params
.stdin_fd
= s
->stdin_fd
;
1539 exec_params
.stdout_fd
= s
->stdout_fd
;
1540 exec_params
.stderr_fd
= s
->stderr_fd
;
1541 exec_params
.exec_fd
= exec_fd
;
1543 r
= exec_spawn(UNIT(s
),
1553 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1554 s
->exec_fd_hot
= false;
1556 r
= unit_watch_pid(UNIT(s
), pid
);
1557 if (r
< 0) /* FIXME: we need to do something here */
1565 static int main_pid_good(Service
*s
) {
1568 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1570 /* If we know the pid file, then let's just check if it is
1572 if (s
->main_pid_known
) {
1574 /* If it's an alien child let's check if it is still
1576 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1577 return pid_is_alive(s
->main_pid
);
1579 /* .. otherwise assume we'll get a SIGCHLD for it,
1580 * which we really should wait for to collect exit
1581 * status and code */
1582 return s
->main_pid
> 0;
1585 /* We don't know the pid */
1589 static int control_pid_good(Service
*s
) {
1592 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1593 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1594 * means: we can't figure it out. */
1596 return s
->control_pid
> 0;
1599 static int cgroup_good(Service
*s
) {
1604 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1607 if (!UNIT(s
)->cgroup_path
)
1610 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1617 static bool service_shall_restart(Service
*s
) {
1620 /* Don't restart after manual stops */
1621 if (s
->forbid_restart
)
1624 /* Never restart if this is configured as special exception */
1625 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1628 /* Restart if the exit code/status are configured as restart triggers */
1629 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1632 switch (s
->restart
) {
1634 case SERVICE_RESTART_NO
:
1637 case SERVICE_RESTART_ALWAYS
:
1640 case SERVICE_RESTART_ON_SUCCESS
:
1641 return s
->result
== SERVICE_SUCCESS
;
1643 case SERVICE_RESTART_ON_FAILURE
:
1644 return s
->result
!= SERVICE_SUCCESS
;
1646 case SERVICE_RESTART_ON_ABNORMAL
:
1647 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1649 case SERVICE_RESTART_ON_WATCHDOG
:
1650 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1652 case SERVICE_RESTART_ON_ABORT
:
1653 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1656 assert_not_reached("unknown restart setting");
1660 static bool service_will_restart(Unit
*u
) {
1661 Service
*s
= SERVICE(u
);
1665 if (s
->will_auto_restart
)
1667 if (s
->state
== SERVICE_AUTO_RESTART
)
1671 if (UNIT(s
)->job
->type
== JOB_START
)
1677 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1682 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1683 * undo what has already been enqueued. */
1684 if (unit_stop_pending(UNIT(s
)))
1685 allow_restart
= false;
1687 if (s
->result
== SERVICE_SUCCESS
)
1690 if (s
->result
!= SERVICE_SUCCESS
)
1691 log_unit_warning(UNIT(s
), "Failed with result '%s'.", service_result_to_string(s
->result
));
1693 if (allow_restart
&& service_shall_restart(s
))
1694 s
->will_auto_restart
= true;
1696 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1697 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1698 s
->n_keep_fd_store
++;
1700 service_set_state(s
, s
->result
!= SERVICE_SUCCESS
? SERVICE_FAILED
: SERVICE_DEAD
);
1702 if (s
->will_auto_restart
) {
1703 s
->will_auto_restart
= false;
1705 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1707 s
->n_keep_fd_store
--;
1711 service_set_state(s
, SERVICE_AUTO_RESTART
);
1713 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1714 * user can still introspect the counter. Do so on the next start. */
1715 s
->flush_n_restarts
= true;
1717 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1718 * queue, so that the fd store is possibly gc'ed again */
1719 s
->n_keep_fd_store
--;
1720 unit_add_to_gc_queue(UNIT(s
));
1722 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1723 s
->forbid_restart
= false;
1725 /* We want fresh tmpdirs in case service is started again immediately */
1726 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1728 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1729 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1730 /* Also, remove the runtime directory */
1731 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1733 /* Get rid of the IPC bits of the user */
1734 unit_unref_uid_gid(UNIT(s
), true);
1736 /* Release the user, and destroy it if we are the only remaining owner */
1737 dynamic_creds_destroy(&s
->dynamic_creds
);
1739 /* Try to delete the pid file. At this point it will be
1740 * out-of-date, and some software might be confused by it, so
1741 * let's remove it. */
1743 (void) unlink(s
->pid_file
);
1748 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1749 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1752 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1756 if (s
->result
== SERVICE_SUCCESS
)
1759 service_unwatch_control_pid(s
);
1760 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1762 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1763 if (s
->control_command
) {
1764 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1766 r
= service_spawn(s
,
1768 s
->timeout_stop_usec
,
1769 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
,
1774 service_set_state(s
, SERVICE_STOP_POST
);
1776 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1781 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1782 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1785 static int state_to_kill_operation(ServiceState state
) {
1788 case SERVICE_STOP_WATCHDOG
:
1789 return KILL_WATCHDOG
;
1791 case SERVICE_STOP_SIGTERM
:
1792 case SERVICE_FINAL_SIGTERM
:
1793 return KILL_TERMINATE
;
1795 case SERVICE_STOP_SIGKILL
:
1796 case SERVICE_FINAL_SIGKILL
:
1800 return _KILL_OPERATION_INVALID
;
1804 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1809 if (s
->result
== SERVICE_SUCCESS
)
1812 /* Before sending any signal, make sure we track all members of this cgroup */
1813 (void) unit_watch_all_pids(UNIT(s
));
1815 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1817 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1819 r
= unit_kill_context(
1822 state_to_kill_operation(state
),
1830 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1834 service_set_state(s
, state
);
1835 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1836 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1837 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1838 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1839 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1840 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1842 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1847 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1849 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1850 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1852 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1855 static void service_enter_stop_by_notify(Service
*s
) {
1858 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1860 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1862 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1863 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1866 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1871 if (s
->result
== SERVICE_SUCCESS
)
1874 service_unwatch_control_pid(s
);
1875 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1877 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1878 if (s
->control_command
) {
1879 s
->control_command_id
= SERVICE_EXEC_STOP
;
1881 r
= service_spawn(s
,
1883 s
->timeout_stop_usec
,
1884 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
,
1889 service_set_state(s
, SERVICE_STOP
);
1891 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1896 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1897 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1900 static bool service_good(Service
*s
) {
1904 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1907 main_pid_ok
= main_pid_good(s
);
1908 if (main_pid_ok
> 0) /* It's alive */
1910 if (main_pid_ok
== 0) /* It's dead */
1913 /* OK, we don't know anything about the main PID, maybe
1914 * because there is none. Let's check the control group
1917 return cgroup_good(s
) != 0;
1920 static void service_enter_running(Service
*s
, ServiceResult f
) {
1923 if (s
->result
== SERVICE_SUCCESS
)
1926 service_unwatch_control_pid(s
);
1928 if (s
->result
!= SERVICE_SUCCESS
)
1929 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1930 else if (service_good(s
)) {
1932 /* If there are any queued up sd_notify() notifications, process them now */
1933 if (s
->notify_state
== NOTIFY_RELOADING
)
1934 service_enter_reload_by_notify(s
);
1935 else if (s
->notify_state
== NOTIFY_STOPPING
)
1936 service_enter_stop_by_notify(s
);
1938 service_set_state(s
, SERVICE_RUNNING
);
1939 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
1942 } else if (s
->remain_after_exit
)
1943 service_set_state(s
, SERVICE_EXITED
);
1945 service_enter_stop(s
, SERVICE_SUCCESS
);
1948 static void service_enter_start_post(Service
*s
) {
1952 service_unwatch_control_pid(s
);
1953 service_reset_watchdog(s
);
1955 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
1956 if (s
->control_command
) {
1957 s
->control_command_id
= SERVICE_EXEC_START_POST
;
1959 r
= service_spawn(s
,
1961 s
->timeout_start_usec
,
1962 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
,
1967 service_set_state(s
, SERVICE_START_POST
);
1969 service_enter_running(s
, SERVICE_SUCCESS
);
1974 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
1975 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
1978 static void service_kill_control_process(Service
*s
) {
1983 if (s
->control_pid
<= 0)
1986 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
1988 _cleanup_free_
char *comm
= NULL
;
1990 (void) get_process_comm(s
->control_pid
, &comm
);
1992 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
1993 s
->control_pid
, strna(comm
));
1997 static void service_enter_start(Service
*s
) {
2005 service_unwatch_control_pid(s
);
2006 service_unwatch_main_pid(s
);
2008 unit_warn_leftover_processes(UNIT(s
));
2010 if (s
->type
== SERVICE_FORKING
) {
2011 s
->control_command_id
= SERVICE_EXEC_START
;
2012 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2014 s
->main_command
= NULL
;
2016 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2017 s
->control_command
= NULL
;
2019 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2023 if (s
->type
!= SERVICE_ONESHOT
) {
2024 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2025 * happen if the configuration changes at runtime. In this case, let's enter a failure
2027 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2032 /* We force a fake state transition here. Otherwise, the unit would go directly from
2033 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2034 * inbetween. This way we can later trigger actions that depend on the state
2035 * transition, including SuccessAction=. */
2036 service_set_state(s
, SERVICE_START
);
2038 service_enter_start_post(s
);
2042 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2043 /* For simple + idle this is the main process. We don't apply any timeout here, but
2044 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2045 timeout
= USEC_INFINITY
;
2047 timeout
= s
->timeout_start_usec
;
2049 r
= service_spawn(s
,
2052 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2057 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2058 /* For simple services we immediately start
2059 * the START_POST binaries. */
2061 service_set_main_pid(s
, pid
);
2062 service_enter_start_post(s
);
2064 } else if (s
->type
== SERVICE_FORKING
) {
2066 /* For forking services we wait until the start
2067 * process exited. */
2069 s
->control_pid
= pid
;
2070 service_set_state(s
, SERVICE_START
);
2072 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2074 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2076 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2077 * bus. 'notify' and 'exec' services are similar. */
2079 service_set_main_pid(s
, pid
);
2080 service_set_state(s
, SERVICE_START
);
2082 assert_not_reached("Unknown service type");
2087 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2088 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2091 static void service_enter_start_pre(Service
*s
) {
2096 service_unwatch_control_pid(s
);
2098 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2099 if (s
->control_command
) {
2101 unit_warn_leftover_processes(UNIT(s
));
2103 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2105 r
= service_spawn(s
,
2107 s
->timeout_start_usec
,
2108 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2113 service_set_state(s
, SERVICE_START_PRE
);
2115 service_enter_start(s
);
2120 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2121 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2124 static void service_enter_restart(Service
*s
) {
2125 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2130 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2131 /* Don't restart things if we are going down anyway */
2132 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2134 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2141 /* Any units that are bound to this service must also be
2142 * restarted. We use JOB_RESTART (instead of the more obvious
2143 * JOB_START) here so that those dependency jobs will be added
2145 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_FAIL
, &error
, NULL
);
2149 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2150 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2151 * explicitly however via the usual "systemctl reset-failure" logic. */
2153 s
->flush_n_restarts
= false;
2155 log_struct(LOG_INFO
,
2156 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2157 LOG_UNIT_ID(UNIT(s
)),
2158 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2159 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2160 "N_RESTARTS=%u", s
->n_restarts
);
2162 /* Notify clients about changed restart counter */
2163 unit_add_to_dbus_queue(UNIT(s
));
2165 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2166 * it will be canceled as part of the service_stop() call that
2167 * is executed as part of JOB_RESTART. */
2172 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2173 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2176 static void service_enter_reload_by_notify(Service
*s
) {
2177 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2182 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2183 service_set_state(s
, SERVICE_RELOAD
);
2185 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2186 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2188 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2191 static void service_enter_reload(Service
*s
) {
2196 service_unwatch_control_pid(s
);
2197 s
->reload_result
= SERVICE_SUCCESS
;
2199 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2200 if (s
->control_command
) {
2201 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2203 r
= service_spawn(s
,
2205 s
->timeout_start_usec
,
2206 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
,
2211 service_set_state(s
, SERVICE_RELOAD
);
2213 service_enter_running(s
, SERVICE_SUCCESS
);
2218 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2219 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2220 service_enter_running(s
, SERVICE_SUCCESS
);
2223 static void service_run_next_control(Service
*s
) {
2228 assert(s
->control_command
);
2229 assert(s
->control_command
->command_next
);
2231 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2233 s
->control_command
= s
->control_command
->command_next
;
2234 service_unwatch_control_pid(s
);
2236 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2237 timeout
= s
->timeout_start_usec
;
2239 timeout
= s
->timeout_stop_usec
;
2241 r
= service_spawn(s
,
2244 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2245 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2246 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0),
2254 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2256 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2257 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2258 else if (s
->state
== SERVICE_STOP_POST
)
2259 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2260 else if (s
->state
== SERVICE_RELOAD
) {
2261 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2262 service_enter_running(s
, SERVICE_SUCCESS
);
2264 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2267 static void service_run_next_main(Service
*s
) {
2272 assert(s
->main_command
);
2273 assert(s
->main_command
->command_next
);
2274 assert(s
->type
== SERVICE_ONESHOT
);
2276 s
->main_command
= s
->main_command
->command_next
;
2277 service_unwatch_main_pid(s
);
2279 r
= service_spawn(s
,
2281 s
->timeout_start_usec
,
2282 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2287 service_set_main_pid(s
, pid
);
2292 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2293 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2296 static int service_start(Unit
*u
) {
2297 Service
*s
= SERVICE(u
);
2302 /* We cannot fulfill this request right now, try again later
2304 if (IN_SET(s
->state
,
2305 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2306 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2309 /* Already on it! */
2310 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2313 /* A service that will be restarted must be stopped first to
2314 * trigger BindsTo and/or OnFailure dependencies. If a user
2315 * does not want to wait for the holdoff time to elapse, the
2316 * service should be manually restarted, not started. We
2317 * simply return EAGAIN here, so that any start jobs stay
2318 * queued, and assume that the auto restart timer will
2319 * eventually trigger the restart. */
2320 if (s
->state
== SERVICE_AUTO_RESTART
)
2323 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2325 /* Make sure we don't enter a busy loop of some kind. */
2326 r
= unit_start_limit_test(u
);
2328 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2332 r
= unit_acquire_invocation_id(u
);
2336 s
->result
= SERVICE_SUCCESS
;
2337 s
->reload_result
= SERVICE_SUCCESS
;
2338 s
->main_pid_known
= false;
2339 s
->main_pid_alien
= false;
2340 s
->forbid_restart
= false;
2342 s
->status_text
= mfree(s
->status_text
);
2343 s
->status_errno
= 0;
2345 s
->notify_state
= NOTIFY_UNKNOWN
;
2347 s
->watchdog_override_enable
= false;
2348 s
->watchdog_override_usec
= 0;
2350 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2351 exec_status_reset(&s
->main_exec_status
);
2353 /* This is not an automatic restart? Flush the restart counter then */
2354 if (s
->flush_n_restarts
) {
2356 s
->flush_n_restarts
= false;
2359 u
->reset_accounting
= true;
2361 service_enter_start_pre(s
);
2365 static int service_stop(Unit
*u
) {
2366 Service
*s
= SERVICE(u
);
2370 /* Don't create restart jobs from manual stops. */
2371 s
->forbid_restart
= true;
2374 if (IN_SET(s
->state
,
2375 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2376 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2379 /* A restart will be scheduled or is in progress. */
2380 if (s
->state
== SERVICE_AUTO_RESTART
) {
2381 service_set_state(s
, SERVICE_DEAD
);
2385 /* If there's already something running we go directly into
2387 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
)) {
2388 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2392 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2394 service_enter_stop(s
, SERVICE_SUCCESS
);
2398 static int service_reload(Unit
*u
) {
2399 Service
*s
= SERVICE(u
);
2403 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2405 service_enter_reload(s
);
2409 _pure_
static bool service_can_reload(Unit
*u
) {
2410 Service
*s
= SERVICE(u
);
2414 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2417 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2418 Service
*s
= SERVICE(u
);
2420 ExecCommand
*first
, *c
;
2424 first
= s
->exec_command
[id
];
2426 /* Figure out where we are in the list by walking back to the beginning */
2427 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2433 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2434 Service
*s
= SERVICE(u
);
2435 ServiceExecCommand id
;
2439 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2440 size_t allocated
= 0, length
= 0;
2448 if (command
== s
->control_command
) {
2450 id
= s
->control_command_id
;
2453 id
= SERVICE_EXEC_START
;
2456 idx
= service_exec_command_index(u
, id
, command
);
2458 STRV_FOREACH(arg
, command
->argv
) {
2460 _cleanup_free_
char *e
= NULL
;
2462 e
= xescape(*arg
, WHITESPACE
);
2467 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1 + n
+ 1))
2471 args
[length
++] = ' ';
2473 memcpy(args
+ length
, e
, n
);
2477 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2481 p
= xescape(command
->path
, WHITESPACE
);
2485 fprintf(f
, "%s-command=%s %u %s %s\n", type
, service_exec_command_to_string(id
), idx
, p
, args
);
2490 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2491 Service
*s
= SERVICE(u
);
2499 unit_serialize_item(u
, f
, "state", service_state_to_string(s
->state
));
2500 unit_serialize_item(u
, f
, "result", service_result_to_string(s
->result
));
2501 unit_serialize_item(u
, f
, "reload-result", service_result_to_string(s
->reload_result
));
2503 if (s
->control_pid
> 0)
2504 unit_serialize_item_format(u
, f
, "control-pid", PID_FMT
, s
->control_pid
);
2506 if (s
->main_pid_known
&& s
->main_pid
> 0)
2507 unit_serialize_item_format(u
, f
, "main-pid", PID_FMT
, s
->main_pid
);
2509 unit_serialize_item(u
, f
, "main-pid-known", yes_no(s
->main_pid_known
));
2510 unit_serialize_item(u
, f
, "bus-name-good", yes_no(s
->bus_name_good
));
2511 unit_serialize_item(u
, f
, "bus-name-owner", s
->bus_name_owner
);
2513 unit_serialize_item_format(u
, f
, "n-restarts", "%u", s
->n_restarts
);
2514 unit_serialize_item(u
, f
, "flush-n-restarts", yes_no(s
->flush_n_restarts
));
2516 r
= unit_serialize_item_escaped(u
, f
, "status-text", s
->status_text
);
2520 service_serialize_exec_command(u
, f
, s
->control_command
);
2521 service_serialize_exec_command(u
, f
, s
->main_command
);
2523 r
= unit_serialize_item_fd(u
, f
, fds
, "stdin-fd", s
->stdin_fd
);
2526 r
= unit_serialize_item_fd(u
, f
, fds
, "stdout-fd", s
->stdout_fd
);
2529 r
= unit_serialize_item_fd(u
, f
, fds
, "stderr-fd", s
->stderr_fd
);
2533 if (s
->exec_fd_event_source
) {
2534 r
= unit_serialize_item_fd(u
, f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2537 unit_serialize_item(u
, f
, "exec-fd-hot", yes_no(s
->exec_fd_hot
));
2540 if (UNIT_ISSET(s
->accept_socket
)) {
2541 r
= unit_serialize_item(u
, f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2546 r
= unit_serialize_item_fd(u
, f
, fds
, "socket-fd", s
->socket_fd
);
2550 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2551 _cleanup_free_
char *c
= NULL
;
2554 copy
= fdset_put_dup(fds
, fs
->fd
);
2558 c
= cescape(fs
->fdname
);
2560 unit_serialize_item_format(u
, f
, "fd-store-fd", "%i %s", copy
, strempty(c
));
2563 if (s
->main_exec_status
.pid
> 0) {
2564 unit_serialize_item_format(u
, f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2565 dual_timestamp_serialize(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2566 dual_timestamp_serialize(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2568 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2569 unit_serialize_item_format(u
, f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2570 unit_serialize_item_format(u
, f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2574 dual_timestamp_serialize(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2576 unit_serialize_item(u
, f
, "forbid-restart", yes_no(s
->forbid_restart
));
2578 if (s
->watchdog_override_enable
)
2579 unit_serialize_item_format(u
, f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2584 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2585 Service
*s
= SERVICE(u
);
2587 unsigned idx
= 0, i
;
2588 bool control
, found
= false;
2589 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2590 ExecCommand
*command
= NULL
;
2591 _cleanup_free_
char *path
= NULL
;
2592 _cleanup_strv_free_
char **argv
= NULL
;
2594 enum ExecCommandState
{
2595 STATE_EXEC_COMMAND_TYPE
,
2596 STATE_EXEC_COMMAND_INDEX
,
2597 STATE_EXEC_COMMAND_PATH
,
2598 STATE_EXEC_COMMAND_ARGS
,
2599 _STATE_EXEC_COMMAND_MAX
,
2600 _STATE_EXEC_COMMAND_INVALID
= -1,
2607 control
= streq(key
, "control-command");
2609 state
= STATE_EXEC_COMMAND_TYPE
;
2612 _cleanup_free_
char *arg
= NULL
;
2614 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
);
2621 case STATE_EXEC_COMMAND_TYPE
:
2622 id
= service_exec_command_from_string(arg
);
2626 state
= STATE_EXEC_COMMAND_INDEX
;
2628 case STATE_EXEC_COMMAND_INDEX
:
2629 r
= safe_atou(arg
, &idx
);
2633 state
= STATE_EXEC_COMMAND_PATH
;
2635 case STATE_EXEC_COMMAND_PATH
:
2636 path
= TAKE_PTR(arg
);
2637 state
= STATE_EXEC_COMMAND_ARGS
;
2639 if (!path_is_absolute(path
))
2642 case STATE_EXEC_COMMAND_ARGS
:
2643 r
= strv_extend(&argv
, arg
);
2648 assert_not_reached("Unknown error at deserialization of exec command");
2653 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2656 /* Let's check whether exec command on given offset matches data that we just deserialized */
2657 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2661 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2666 /* Command at the index we serialized is different, let's look for command that exactly
2667 * matches but is on different index. If there is no such command we will not resume execution. */
2668 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2669 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2673 if (command
&& control
)
2674 s
->control_command
= command
;
2676 s
->main_command
= command
;
2678 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2683 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2684 Service
*s
= SERVICE(u
);
2692 if (streq(key
, "state")) {
2695 state
= service_state_from_string(value
);
2697 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2699 s
->deserialized_state
= state
;
2700 } else if (streq(key
, "result")) {
2703 f
= service_result_from_string(value
);
2705 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2706 else if (f
!= SERVICE_SUCCESS
)
2709 } else if (streq(key
, "reload-result")) {
2712 f
= service_result_from_string(value
);
2714 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2715 else if (f
!= SERVICE_SUCCESS
)
2716 s
->reload_result
= f
;
2718 } else if (streq(key
, "control-pid")) {
2721 if (parse_pid(value
, &pid
) < 0)
2722 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2724 s
->control_pid
= pid
;
2725 } else if (streq(key
, "main-pid")) {
2728 if (parse_pid(value
, &pid
) < 0)
2729 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2731 (void) service_set_main_pid(s
, pid
);
2732 } else if (streq(key
, "main-pid-known")) {
2735 b
= parse_boolean(value
);
2737 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2739 s
->main_pid_known
= b
;
2740 } else if (streq(key
, "bus-name-good")) {
2743 b
= parse_boolean(value
);
2745 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2747 s
->bus_name_good
= b
;
2748 } else if (streq(key
, "bus-name-owner")) {
2749 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2751 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2752 } else if (streq(key
, "status-text")) {
2755 r
= cunescape(value
, 0, &t
);
2757 log_unit_debug_errno(u
, r
, "Failed to unescape status text: %s", value
);
2759 free(s
->status_text
);
2763 } else if (streq(key
, "accept-socket")) {
2766 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2768 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit: %s", value
);
2770 unit_ref_set(&s
->accept_socket
, u
, socket
);
2771 SOCKET(socket
)->n_connections
++;
2774 } else if (streq(key
, "socket-fd")) {
2777 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2778 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2780 asynchronous_close(s
->socket_fd
);
2781 s
->socket_fd
= fdset_remove(fds
, fd
);
2783 } else if (streq(key
, "fd-store-fd")) {
2788 pf
= strcspn(value
, WHITESPACE
);
2789 fdv
= strndupa(value
, pf
);
2791 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2792 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2794 _cleanup_free_
char *t
= NULL
;
2798 fdn
+= strspn(fdn
, WHITESPACE
);
2799 (void) cunescape(fdn
, 0, &t
);
2801 r
= service_add_fd_store(s
, fd
, t
);
2803 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2805 fdset_remove(fds
, fd
);
2808 } else if (streq(key
, "main-exec-status-pid")) {
2811 if (parse_pid(value
, &pid
) < 0)
2812 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2814 s
->main_exec_status
.pid
= pid
;
2815 } else if (streq(key
, "main-exec-status-code")) {
2818 if (safe_atoi(value
, &i
) < 0)
2819 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2821 s
->main_exec_status
.code
= i
;
2822 } else if (streq(key
, "main-exec-status-status")) {
2825 if (safe_atoi(value
, &i
) < 0)
2826 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2828 s
->main_exec_status
.status
= i
;
2829 } else if (streq(key
, "main-exec-status-start"))
2830 dual_timestamp_deserialize(value
, &s
->main_exec_status
.start_timestamp
);
2831 else if (streq(key
, "main-exec-status-exit"))
2832 dual_timestamp_deserialize(value
, &s
->main_exec_status
.exit_timestamp
);
2833 else if (streq(key
, "watchdog-timestamp"))
2834 dual_timestamp_deserialize(value
, &s
->watchdog_timestamp
);
2835 else if (streq(key
, "forbid-restart")) {
2838 b
= parse_boolean(value
);
2840 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2842 s
->forbid_restart
= b
;
2843 } else if (streq(key
, "stdin-fd")) {
2846 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2847 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2849 asynchronous_close(s
->stdin_fd
);
2850 s
->stdin_fd
= fdset_remove(fds
, fd
);
2851 s
->exec_context
.stdio_as_fds
= true;
2853 } else if (streq(key
, "stdout-fd")) {
2856 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2857 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
2859 asynchronous_close(s
->stdout_fd
);
2860 s
->stdout_fd
= fdset_remove(fds
, fd
);
2861 s
->exec_context
.stdio_as_fds
= true;
2863 } else if (streq(key
, "stderr-fd")) {
2866 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2867 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
2869 asynchronous_close(s
->stderr_fd
);
2870 s
->stderr_fd
= fdset_remove(fds
, fd
);
2871 s
->exec_context
.stdio_as_fds
= true;
2873 } else if (streq(key
, "exec-fd")) {
2876 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2877 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
2879 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
2881 fd
= fdset_remove(fds
, fd
);
2882 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
2885 } else if (streq(key
, "watchdog-override-usec")) {
2886 usec_t watchdog_override_usec
;
2887 if (timestamp_deserialize(value
, &watchdog_override_usec
) < 0)
2888 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
2890 s
->watchdog_override_enable
= true;
2891 s
->watchdog_override_usec
= watchdog_override_usec
;
2893 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
2894 r
= service_deserialize_exec_command(u
, key
, value
);
2896 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
2898 } else if (streq(key
, "n-restarts")) {
2899 r
= safe_atou(value
, &s
->n_restarts
);
2901 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
2903 } else if (streq(key
, "flush-n-restarts")) {
2904 r
= parse_boolean(value
);
2906 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
2908 s
->flush_n_restarts
= r
;
2910 log_unit_debug(u
, "Unknown serialization key: %s", key
);
2915 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
2916 const UnitActiveState
*table
;
2920 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
2922 return table
[SERVICE(u
)->state
];
2925 static const char *service_sub_state_to_string(Unit
*u
) {
2928 return service_state_to_string(SERVICE(u
)->state
);
2931 static bool service_may_gc(Unit
*u
) {
2932 Service
*s
= SERVICE(u
);
2936 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2937 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2938 * have moved outside of the cgroup. */
2940 if (main_pid_good(s
) > 0 ||
2941 control_pid_good(s
) > 0)
2947 static int service_retry_pid_file(Service
*s
) {
2950 assert(s
->pid_file
);
2951 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
2953 r
= service_load_pid_file(s
, false);
2957 service_unwatch_pid_file(s
);
2959 service_enter_running(s
, SERVICE_SUCCESS
);
2963 static int service_watch_pid_file(Service
*s
) {
2966 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
2968 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
2972 /* the pidfile might have appeared just before we set the watch */
2973 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
2974 service_retry_pid_file(s
);
2978 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
2979 service_unwatch_pid_file(s
);
2983 static int service_demand_pid_file(Service
*s
) {
2986 assert(s
->pid_file
);
2987 assert(!s
->pid_file_pathspec
);
2989 ps
= new0(PathSpec
, 1);
2994 ps
->path
= strdup(s
->pid_file
);
3000 path_simplify(ps
->path
, false);
3002 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3003 * keep their PID file open all the time. */
3004 ps
->type
= PATH_MODIFIED
;
3005 ps
->inotify_fd
= -1;
3007 s
->pid_file_pathspec
= ps
;
3009 return service_watch_pid_file(s
);
3012 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3013 PathSpec
*p
= userdata
;
3018 s
= SERVICE(p
->unit
);
3022 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3023 assert(s
->pid_file_pathspec
);
3024 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3026 log_unit_debug(UNIT(s
), "inotify event");
3028 if (path_spec_fd_event(p
, events
) < 0)
3031 if (service_retry_pid_file(s
) == 0)
3034 if (service_watch_pid_file(s
) < 0)
3040 service_unwatch_pid_file(s
);
3041 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3045 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3046 Service
*s
= SERVICE(userdata
);
3050 log_unit_debug(UNIT(s
), "got exec-fd event");
3052 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3053 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3054 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3055 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3056 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3057 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3058 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3059 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3065 n
= read(fd
, &x
, sizeof(x
));
3067 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3070 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3072 if (n
== 0) { /* EOF → the event we are waiting for */
3074 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3076 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3077 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3079 s
->exec_fd_hot
= false;
3081 /* Nice! This is what we have been waiting for. Transition to next state. */
3082 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3083 service_enter_start_post(s
);
3085 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3090 /* A byte was read → this turns on/off the exec fd logic */
3091 assert(n
== sizeof(x
));
3098 static void service_notify_cgroup_empty_event(Unit
*u
) {
3099 Service
*s
= SERVICE(u
);
3103 log_unit_debug(u
, "cgroup is empty");
3107 /* Waiting for SIGCHLD is usually more interesting,
3108 * because it includes return codes/signals. Which is
3109 * why we ignore the cgroup events for most cases,
3110 * except when we don't know pid which to expect the
3114 if (s
->type
== SERVICE_NOTIFY
&&
3115 main_pid_good(s
) == 0 &&
3116 control_pid_good(s
) == 0) {
3117 /* No chance of getting a ready notification anymore */
3118 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3123 case SERVICE_START_POST
:
3124 if (s
->pid_file_pathspec
&&
3125 main_pid_good(s
) == 0 &&
3126 control_pid_good(s
) == 0) {
3128 /* Give up hoping for the daemon to write its PID file */
3129 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3131 service_unwatch_pid_file(s
);
3132 if (s
->state
== SERVICE_START
)
3133 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3135 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3139 case SERVICE_RUNNING
:
3140 /* service_enter_running() will figure out what to do */
3141 service_enter_running(s
, SERVICE_SUCCESS
);
3144 case SERVICE_STOP_WATCHDOG
:
3145 case SERVICE_STOP_SIGTERM
:
3146 case SERVICE_STOP_SIGKILL
:
3148 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3149 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3153 case SERVICE_STOP_POST
:
3154 case SERVICE_FINAL_SIGTERM
:
3155 case SERVICE_FINAL_SIGKILL
:
3156 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3157 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3166 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3167 bool notify_dbus
= true;
3168 Service
*s
= SERVICE(u
);
3174 if (is_clean_exit(code
, status
, s
->type
== SERVICE_ONESHOT
? EXIT_CLEAN_COMMAND
: EXIT_CLEAN_DAEMON
, &s
->success_status
))
3175 f
= SERVICE_SUCCESS
;
3176 else if (code
== CLD_EXITED
)
3177 f
= SERVICE_FAILURE_EXIT_CODE
;
3178 else if (code
== CLD_KILLED
)
3179 f
= SERVICE_FAILURE_SIGNAL
;
3180 else if (code
== CLD_DUMPED
)
3181 f
= SERVICE_FAILURE_CORE_DUMP
;
3183 assert_not_reached("Unknown code");
3185 if (s
->main_pid
== pid
) {
3186 /* Forking services may occasionally move to a new PID.
3187 * As long as they update the PID file before exiting the old
3188 * PID, they're fine. */
3189 if (service_load_pid_file(s
, false) > 0)
3193 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3195 if (s
->main_command
) {
3196 /* If this is not a forking service than the
3197 * main process got started and hence we copy
3198 * the exit status so that it is recorded both
3199 * as main and as control process exit
3202 s
->main_command
->exec_status
= s
->main_exec_status
;
3204 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3205 f
= SERVICE_SUCCESS
;
3206 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3208 /* If this is a forked process, then we should
3209 * ignore the return value if this was
3210 * configured for the starter process */
3212 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3213 f
= SERVICE_SUCCESS
;
3216 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3217 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3218 * that the service already logged the reason at a higher log level on its own. However, if the service
3219 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
3220 * our log level to WARNING then. */
3222 log_struct(f
== SERVICE_SUCCESS
? LOG_DEBUG
:
3223 (code
== CLD_EXITED
? LOG_NOTICE
: LOG_WARNING
),
3224 LOG_UNIT_MESSAGE(u
, "Main process exited, code=%s, status=%i/%s",
3225 sigchld_code_to_string(code
), status
,
3226 strna(code
== CLD_EXITED
3227 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
3228 : signal_to_string(status
))),
3229 "EXIT_CODE=%s", sigchld_code_to_string(code
),
3230 "EXIT_STATUS=%i", status
,
3232 LOG_UNIT_INVOCATION_ID(u
));
3234 if (s
->result
== SERVICE_SUCCESS
)
3237 if (s
->main_command
&&
3238 s
->main_command
->command_next
&&
3239 s
->type
== SERVICE_ONESHOT
&&
3240 f
== SERVICE_SUCCESS
) {
3242 /* There is another command to *
3243 * execute, so let's do that. */
3245 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3246 service_run_next_main(s
);
3250 /* The service exited, so the service is officially
3252 s
->main_command
= NULL
;
3256 case SERVICE_START_POST
:
3257 case SERVICE_RELOAD
:
3259 /* Need to wait until the operation is
3264 if (s
->type
== SERVICE_ONESHOT
) {
3265 /* This was our main goal, so let's go on */
3266 if (f
== SERVICE_SUCCESS
)
3267 service_enter_start_post(s
);
3269 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3271 } else if (s
->type
== SERVICE_NOTIFY
) {
3272 /* Only enter running through a notification, so that the
3273 * SERVICE_START state signifies that no ready notification
3274 * has been received */
3275 if (f
!= SERVICE_SUCCESS
)
3276 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3277 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3278 /* The service has never been and will never be active */
3279 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3284 case SERVICE_RUNNING
:
3285 service_enter_running(s
, f
);
3288 case SERVICE_STOP_WATCHDOG
:
3289 case SERVICE_STOP_SIGTERM
:
3290 case SERVICE_STOP_SIGKILL
:
3292 if (control_pid_good(s
) <= 0)
3293 service_enter_stop_post(s
, f
);
3295 /* If there is still a control process, wait for that first */
3298 case SERVICE_STOP_POST
:
3299 case SERVICE_FINAL_SIGTERM
:
3300 case SERVICE_FINAL_SIGKILL
:
3302 if (control_pid_good(s
) <= 0)
3303 service_enter_dead(s
, f
, true);
3307 assert_not_reached("Uh, main process died at wrong time.");
3311 } else if (s
->control_pid
== pid
) {
3314 if (s
->control_command
) {
3315 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3317 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3318 f
= SERVICE_SUCCESS
;
3321 log_unit_full(u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
, 0,
3322 "Control process exited, code=%s status=%i",
3323 sigchld_code_to_string(code
), status
);
3325 if (s
->result
== SERVICE_SUCCESS
)
3328 if (s
->control_command
&&
3329 s
->control_command
->command_next
&&
3330 f
== SERVICE_SUCCESS
) {
3332 /* There is another command to *
3333 * execute, so let's do that. */
3335 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3336 service_run_next_control(s
);
3339 /* No further commands for this step, so let's
3340 * figure out what to do next */
3342 s
->control_command
= NULL
;
3343 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3345 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3349 case SERVICE_START_PRE
:
3350 if (f
== SERVICE_SUCCESS
)
3351 service_enter_start(s
);
3353 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3357 if (s
->type
!= SERVICE_FORKING
)
3358 /* Maybe spurious event due to a reload that changed the type? */
3361 if (f
!= SERVICE_SUCCESS
) {
3362 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3367 bool has_start_post
;
3370 /* Let's try to load the pid file here if we can.
3371 * The PID file might actually be created by a START_POST
3372 * script. In that case don't worry if the loading fails. */
3374 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3375 r
= service_load_pid_file(s
, !has_start_post
);
3376 if (!has_start_post
&& r
< 0) {
3377 r
= service_demand_pid_file(s
);
3378 if (r
< 0 || cgroup_good(s
) == 0)
3379 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3383 service_search_main_pid(s
);
3385 service_enter_start_post(s
);
3388 case SERVICE_START_POST
:
3389 if (f
!= SERVICE_SUCCESS
) {
3390 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3397 r
= service_load_pid_file(s
, true);
3399 r
= service_demand_pid_file(s
);
3400 if (r
< 0 || cgroup_good(s
) == 0)
3401 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3405 service_search_main_pid(s
);
3407 service_enter_running(s
, SERVICE_SUCCESS
);
3410 case SERVICE_RELOAD
:
3411 if (f
== SERVICE_SUCCESS
)
3412 if (service_load_pid_file(s
, true) < 0)
3413 service_search_main_pid(s
);
3415 s
->reload_result
= f
;
3416 service_enter_running(s
, SERVICE_SUCCESS
);
3420 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3423 case SERVICE_STOP_WATCHDOG
:
3424 case SERVICE_STOP_SIGTERM
:
3425 case SERVICE_STOP_SIGKILL
:
3426 if (main_pid_good(s
) <= 0)
3427 service_enter_stop_post(s
, f
);
3429 /* If there is still a service
3430 * process around, wait until
3431 * that one quit, too */
3434 case SERVICE_STOP_POST
:
3435 case SERVICE_FINAL_SIGTERM
:
3436 case SERVICE_FINAL_SIGKILL
:
3437 if (main_pid_good(s
) <= 0)
3438 service_enter_dead(s
, f
, true);
3442 assert_not_reached("Uh, control process died at wrong time.");
3445 } else /* Neither control nor main PID? If so, don't notify about anything */
3446 notify_dbus
= false;
3448 /* Notify clients about changed exit status */
3450 unit_add_to_dbus_queue(u
);
3452 /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to watch,
3453 * under the assumption that we'll sooner or later get a SIGCHLD for them, as the original process we watched
3454 * was probably the parent of them, and they are hence now our children. */
3455 (void) unit_enqueue_rewatch_pids(u
);
3458 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3459 Service
*s
= SERVICE(userdata
);
3462 assert(source
== s
->timer_event_source
);
3466 case SERVICE_START_PRE
:
3468 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", s
->state
== SERVICE_START
? "Start" : "Start-pre");
3469 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3472 case SERVICE_START_POST
:
3473 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3474 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3477 case SERVICE_RUNNING
:
3478 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3479 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3482 case SERVICE_RELOAD
:
3483 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3484 service_kill_control_process(s
);
3485 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3486 service_enter_running(s
, SERVICE_SUCCESS
);
3490 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3491 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3494 case SERVICE_STOP_WATCHDOG
:
3495 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3496 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3499 case SERVICE_STOP_SIGTERM
:
3500 if (s
->kill_context
.send_sigkill
) {
3501 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3502 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3504 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3505 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3510 case SERVICE_STOP_SIGKILL
:
3511 /* Uh, we sent a SIGKILL and it is still not gone?
3512 * Must be something we cannot kill, so let's just be
3513 * weirded out and continue */
3515 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3516 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3519 case SERVICE_STOP_POST
:
3520 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3521 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3524 case SERVICE_FINAL_SIGTERM
:
3525 if (s
->kill_context
.send_sigkill
) {
3526 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3527 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3529 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3530 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3535 case SERVICE_FINAL_SIGKILL
:
3536 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3537 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3540 case SERVICE_AUTO_RESTART
:
3541 if (s
->restart_usec
> 0) {
3542 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3543 log_unit_info(UNIT(s
),
3544 "Service RestartSec=%s expired, scheduling restart.",
3545 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3547 log_unit_info(UNIT(s
),
3548 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3550 service_enter_restart(s
);
3554 assert_not_reached("Timeout at wrong time.");
3560 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3561 Service
*s
= SERVICE(userdata
);
3562 char t
[FORMAT_TIMESPAN_MAX
];
3563 usec_t watchdog_usec
;
3566 assert(source
== s
->watchdog_event_source
);
3568 watchdog_usec
= service_get_watchdog_usec(s
);
3570 if (UNIT(s
)->manager
->service_watchdogs
) {
3571 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3572 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3574 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3576 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3577 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3582 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3585 if (s
->notify_access
== NOTIFY_NONE
) {
3586 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3590 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3591 if (s
->main_pid
!= 0)
3592 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
);
3594 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
);
3599 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3600 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3601 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
,
3602 pid
, s
->main_pid
, s
->control_pid
);
3603 else if (s
->main_pid
!= 0)
3604 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
);
3605 else if (s
->control_pid
!= 0)
3606 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
);
3608 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
);
3616 static void service_notify_message(
3618 const struct ucred
*ucred
,
3622 Service
*s
= SERVICE(u
);
3623 bool notify_dbus
= false;
3631 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3634 if (DEBUG_LOGGING
) {
3635 _cleanup_free_
char *cc
= NULL
;
3637 cc
= strv_join(tags
, ", ");
3638 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3641 /* Interpret MAINPID= */
3642 e
= strv_find_startswith(tags
, "MAINPID=");
3643 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3646 if (parse_pid(e
, &new_main_pid
) < 0)
3647 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3648 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3650 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3652 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3654 if (ucred
->uid
== 0) {
3655 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
);
3658 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3661 service_set_main_pid(s
, new_main_pid
);
3663 r
= unit_watch_pid(UNIT(s
), new_main_pid
);
3665 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3672 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3673 STRV_FOREACH_BACKWARDS(i
, tags
) {
3675 if (streq(*i
, "READY=1")) {
3676 s
->notify_state
= NOTIFY_READY
;
3678 /* Type=notify services inform us about completed
3679 * initialization with READY=1 */
3680 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3681 service_enter_start_post(s
);
3683 /* Sending READY=1 while we are reloading informs us
3684 * that the reloading is complete */
3685 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3686 service_enter_running(s
, SERVICE_SUCCESS
);
3691 } else if (streq(*i
, "RELOADING=1")) {
3692 s
->notify_state
= NOTIFY_RELOADING
;
3694 if (s
->state
== SERVICE_RUNNING
)
3695 service_enter_reload_by_notify(s
);
3700 } else if (streq(*i
, "STOPPING=1")) {
3701 s
->notify_state
= NOTIFY_STOPPING
;
3703 if (s
->state
== SERVICE_RUNNING
)
3704 service_enter_stop_by_notify(s
);
3711 /* Interpret STATUS= */
3712 e
= strv_find_startswith(tags
, "STATUS=");
3714 _cleanup_free_
char *t
= NULL
;
3717 if (!utf8_is_valid(e
))
3718 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean.");
3726 if (!streq_ptr(s
->status_text
, t
)) {
3727 free_and_replace(s
->status_text
, t
);
3732 /* Interpret ERRNO= */
3733 e
= strv_find_startswith(tags
, "ERRNO=");
3737 status_errno
= parse_errno(e
);
3738 if (status_errno
< 0)
3739 log_unit_warning_errno(u
, status_errno
,
3740 "Failed to parse ERRNO= field in notification message: %s", e
);
3741 else if (s
->status_errno
!= status_errno
) {
3742 s
->status_errno
= status_errno
;
3747 /* Interpret EXTEND_TIMEOUT= */
3748 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3750 usec_t extend_timeout_usec
;
3751 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3752 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3754 service_extend_timeout(s
, extend_timeout_usec
);
3757 /* Interpret WATCHDOG= */
3758 if (strv_find(tags
, "WATCHDOG=1"))
3759 service_reset_watchdog(s
);
3761 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
3763 usec_t watchdog_override_usec
;
3764 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
3765 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
3767 service_reset_watchdog_timeout(s
, watchdog_override_usec
);
3770 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3771 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3772 * fds, but optional when pushing in new fds, for compatibility reasons. */
3773 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
3776 name
= strv_find_startswith(tags
, "FDNAME=");
3777 if (!name
|| !fdname_is_valid(name
))
3778 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3780 service_remove_fd_store(s
, name
);
3782 } else if (strv_find(tags
, "FDSTORE=1")) {
3785 name
= strv_find_startswith(tags
, "FDNAME=");
3786 if (name
&& !fdname_is_valid(name
)) {
3787 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
3791 (void) service_add_fd_store_set(s
, fds
, name
);
3794 /* Notify clients about changed status or main pid */
3796 unit_add_to_dbus_queue(u
);
3799 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
3800 Service
*s
= SERVICE(u
);
3804 if (!s
->timer_event_source
)
3807 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3810 if (t
== USEC_INFINITY
)
3817 static void service_bus_name_owner_change(
3820 const char *old_owner
,
3821 const char *new_owner
) {
3823 Service
*s
= SERVICE(u
);
3829 assert(streq(s
->bus_name
, name
));
3830 assert(old_owner
|| new_owner
);
3832 if (old_owner
&& new_owner
)
3833 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", name
, old_owner
, new_owner
);
3835 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", name
, old_owner
);
3837 log_unit_debug(u
, "D-Bus name %s now registered by %s", name
, new_owner
);
3839 s
->bus_name_good
= !!new_owner
;
3841 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3842 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
3844 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
3848 if (s
->type
== SERVICE_DBUS
) {
3850 /* service_enter_running() will figure out what to
3852 if (s
->state
== SERVICE_RUNNING
)
3853 service_enter_running(s
, SERVICE_SUCCESS
);
3854 else if (s
->state
== SERVICE_START
&& new_owner
)
3855 service_enter_start_post(s
);
3857 } else if (new_owner
&&
3865 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
3868 /* Try to acquire PID from bus service */
3870 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, name
, SD_BUS_CREDS_PID
, &creds
);
3872 r
= sd_bus_creds_get_pid(creds
, &pid
);
3874 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, name
, pid
);
3876 service_set_main_pid(s
, pid
);
3877 unit_watch_pid(UNIT(s
), pid
);
3882 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
3883 _cleanup_free_
char *peer
= NULL
;
3889 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3890 * to be configured. We take ownership of the passed fd on success. */
3892 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
3895 if (s
->socket_fd
>= 0)
3898 if (s
->state
!= SERVICE_DEAD
)
3901 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
3903 if (UNIT(s
)->description
) {
3904 _cleanup_free_
char *a
;
3906 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
3910 r
= unit_set_description(UNIT(s
), a
);
3912 r
= unit_set_description(UNIT(s
), peer
);
3918 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
3923 s
->socket_fd_selinux_context_net
= selinux_context_net
;
3925 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
3929 static void service_reset_failed(Unit
*u
) {
3930 Service
*s
= SERVICE(u
);
3934 if (s
->state
== SERVICE_FAILED
)
3935 service_set_state(s
, SERVICE_DEAD
);
3937 s
->result
= SERVICE_SUCCESS
;
3938 s
->reload_result
= SERVICE_SUCCESS
;
3940 s
->flush_n_restarts
= false;
3943 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
3944 Service
*s
= SERVICE(u
);
3948 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
3951 static int service_main_pid(Unit
*u
) {
3952 Service
*s
= SERVICE(u
);
3959 static int service_control_pid(Unit
*u
) {
3960 Service
*s
= SERVICE(u
);
3964 return s
->control_pid
;
3967 static bool service_needs_console(Unit
*u
) {
3968 Service
*s
= SERVICE(u
);
3972 /* We provide our own implementation of this here, instead of relying of the generic implementation
3973 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
3975 if (!exec_context_may_touch_console(&s
->exec_context
))
3978 return IN_SET(s
->state
,
3985 SERVICE_STOP_WATCHDOG
,
3986 SERVICE_STOP_SIGTERM
,
3987 SERVICE_STOP_SIGKILL
,
3989 SERVICE_FINAL_SIGTERM
,
3990 SERVICE_FINAL_SIGKILL
);
3993 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
3994 [SERVICE_RESTART_NO
] = "no",
3995 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
3996 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
3997 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
3998 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
3999 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4000 [SERVICE_RESTART_ALWAYS
] = "always",
4003 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4005 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4006 [SERVICE_SIMPLE
] = "simple",
4007 [SERVICE_FORKING
] = "forking",
4008 [SERVICE_ONESHOT
] = "oneshot",
4009 [SERVICE_DBUS
] = "dbus",
4010 [SERVICE_NOTIFY
] = "notify",
4011 [SERVICE_IDLE
] = "idle",
4012 [SERVICE_EXEC
] = "exec",
4015 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4017 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4018 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4019 [SERVICE_EXEC_START
] = "ExecStart",
4020 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4021 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4022 [SERVICE_EXEC_STOP
] = "ExecStop",
4023 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4026 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4028 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4029 [NOTIFY_UNKNOWN
] = "unknown",
4030 [NOTIFY_READY
] = "ready",
4031 [NOTIFY_RELOADING
] = "reloading",
4032 [NOTIFY_STOPPING
] = "stopping",
4035 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4037 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4038 [SERVICE_SUCCESS
] = "success",
4039 [SERVICE_FAILURE_RESOURCES
] = "resources",
4040 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4041 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4042 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4043 [SERVICE_FAILURE_SIGNAL
] = "signal",
4044 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4045 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4046 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4049 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4051 const UnitVTable service_vtable
= {
4052 .object_size
= sizeof(Service
),
4053 .exec_context_offset
= offsetof(Service
, exec_context
),
4054 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4055 .kill_context_offset
= offsetof(Service
, kill_context
),
4056 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4057 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4063 .private_section
= "Service",
4065 .can_transient
= true,
4066 .can_delegate
= true,
4068 .init
= service_init
,
4069 .done
= service_done
,
4070 .load
= service_load
,
4071 .release_resources
= service_release_resources
,
4073 .coldplug
= service_coldplug
,
4075 .dump
= service_dump
,
4077 .start
= service_start
,
4078 .stop
= service_stop
,
4079 .reload
= service_reload
,
4081 .can_reload
= service_can_reload
,
4083 .kill
= service_kill
,
4085 .serialize
= service_serialize
,
4086 .deserialize_item
= service_deserialize_item
,
4088 .active_state
= service_active_state
,
4089 .sub_state_to_string
= service_sub_state_to_string
,
4091 .will_restart
= service_will_restart
,
4093 .may_gc
= service_may_gc
,
4095 .sigchld_event
= service_sigchld_event
,
4097 .reset_failed
= service_reset_failed
,
4099 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4100 .notify_message
= service_notify_message
,
4102 .main_pid
= service_main_pid
,
4103 .control_pid
= service_control_pid
,
4105 .bus_name_owner_change
= service_bus_name_owner_change
,
4107 .bus_vtable
= bus_service_vtable
,
4108 .bus_set_property
= bus_service_set_property
,
4109 .bus_commit_properties
= bus_service_commit_properties
,
4111 .get_timeout
= service_get_timeout
,
4112 .needs_console
= service_needs_console
,
4114 .status_message_formats
= {
4115 .starting_stopping
= {
4116 [0] = "Starting %s...",
4117 [1] = "Stopping %s...",
4119 .finished_start_job
= {
4120 [JOB_DONE
] = "Started %s.",
4121 [JOB_FAILED
] = "Failed to start %s.",
4123 .finished_stop_job
= {
4124 [JOB_DONE
] = "Stopped %s.",
4125 [JOB_FAILED
] = "Stopped (with error) %s.",