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 log_unit_error(UNIT(s
), "Service lacks both ExecStart= and ExecStop= setting. Refusing.");
546 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
547 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
551 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
]) {
552 log_unit_error(UNIT(s
), "Service has no ExecStart= setting, which is only allowed for RemainAfterExit=yes services. Refusing.");
556 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
) {
557 log_unit_error(UNIT(s
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
561 if (s
->type
== SERVICE_ONESHOT
&& s
->restart
!= SERVICE_RESTART_NO
) {
562 log_unit_error(UNIT(s
), "Service has Restart= setting other than no, which isn't allowed for Type=oneshot services. Refusing.");
566 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
)) {
567 log_unit_error(UNIT(s
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
571 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
) {
572 log_unit_error(UNIT(s
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
576 if (s
->bus_name
&& s
->type
!= SERVICE_DBUS
)
577 log_unit_warning(UNIT(s
), "Service has a D-Bus service name specified, but is not of type dbus. Ignoring.");
579 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
)) {
580 log_unit_error(UNIT(s
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
584 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
585 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
587 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
588 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
590 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
591 log_unit_warning(UNIT(s
), "MaxRuntimeSec= has no effect in combination with Type=oneshot. Ignoring.");
596 static int service_add_default_dependencies(Service
*s
) {
601 if (!UNIT(s
)->default_dependencies
)
604 /* Add a number of automatic dependencies useful for the
605 * majority of services. */
607 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
608 /* First, pull in the really early boot stuff, and
609 * require it, so that we fail if we can't acquire
612 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
617 /* In the --user instance there's no sysinit.target,
618 * in that case require basic.target instead. */
620 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
625 /* Second, if the rest of the base system is in the same
626 * transaction, order us after it, but do not pull it in or
627 * even require it. */
628 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
632 /* Third, add us in for normal shutdown. */
633 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
636 static void service_fix_output(Service
*s
) {
639 /* If nothing has been explicitly configured, patch default output in. If input is socket/tty we avoid this
640 * however, since in that case we want output to default to the same place as we read input from. */
642 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
643 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
644 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
645 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
647 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
&&
648 s
->exec_context
.std_input
== EXEC_INPUT_NULL
)
649 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
651 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
652 s
->exec_context
.stdin_data_size
> 0)
653 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
656 static int service_setup_bus_name(Service
*s
) {
664 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
666 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
668 /* We always want to be ordered against dbus.socket if both are in the transaction. */
669 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, 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 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
675 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
677 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
682 static int service_add_extras(Service
*s
) {
687 if (s
->type
== _SERVICE_TYPE_INVALID
) {
688 /* Figure out a type automatically */
690 s
->type
= SERVICE_DBUS
;
691 else if (s
->exec_command
[SERVICE_EXEC_START
])
692 s
->type
= SERVICE_SIMPLE
;
694 s
->type
= SERVICE_ONESHOT
;
697 /* Oneshot services have disabled start timeout by default */
698 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
699 s
->timeout_start_usec
= USEC_INFINITY
;
701 service_fix_output(s
);
703 r
= unit_patch_contexts(UNIT(s
));
707 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
711 r
= unit_set_default_slice(UNIT(s
));
715 /* If the service needs the notify socket, let's enable it automatically. */
716 if (s
->notify_access
== NOTIFY_NONE
&&
717 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
718 s
->notify_access
= NOTIFY_MAIN
;
720 r
= service_add_default_dependencies(s
);
724 r
= service_setup_bus_name(s
);
731 static int service_load(Unit
*u
) {
732 Service
*s
= SERVICE(u
);
737 /* Load a .service file */
738 r
= unit_load_fragment(u
);
742 /* Still nothing found? Then let's give up */
743 if (u
->load_state
== UNIT_STUB
)
746 /* This is a new unit? Then let's add in some extras */
747 if (u
->load_state
== UNIT_LOADED
) {
749 /* We were able to load something, then let's add in
750 * the dropin directories. */
751 r
= unit_load_dropin(u
);
755 /* This is a new unit? Then let's add in some
757 r
= service_add_extras(s
);
762 return service_verify(s
);
765 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
766 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
];
767 char buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
];
768 ServiceExecCommand c
;
769 Service
*s
= SERVICE(u
);
774 prefix
= strempty(prefix
);
775 prefix2
= strjoina(prefix
, "\t");
778 "%sService State: %s\n"
780 "%sReload Result: %s\n"
781 "%sPermissionsStartOnly: %s\n"
782 "%sRootDirectoryStartOnly: %s\n"
783 "%sRemainAfterExit: %s\n"
784 "%sGuessMainPID: %s\n"
787 "%sNotifyAccess: %s\n"
788 "%sNotifyState: %s\n",
789 prefix
, service_state_to_string(s
->state
),
790 prefix
, service_result_to_string(s
->result
),
791 prefix
, service_result_to_string(s
->reload_result
),
792 prefix
, yes_no(s
->permissions_start_only
),
793 prefix
, yes_no(s
->root_directory_start_only
),
794 prefix
, yes_no(s
->remain_after_exit
),
795 prefix
, yes_no(s
->guess_main_pid
),
796 prefix
, service_type_to_string(s
->type
),
797 prefix
, service_restart_to_string(s
->restart
),
798 prefix
, notify_access_to_string(s
->notify_access
),
799 prefix
, notify_state_to_string(s
->notify_state
));
801 if (s
->control_pid
> 0)
803 "%sControl PID: "PID_FMT
"\n",
804 prefix
, s
->control_pid
);
808 "%sMain PID: "PID_FMT
"\n"
809 "%sMain PID Known: %s\n"
810 "%sMain PID Alien: %s\n",
812 prefix
, yes_no(s
->main_pid_known
),
813 prefix
, yes_no(s
->main_pid_alien
));
818 prefix
, s
->pid_file
);
823 "%sBus Name Good: %s\n",
825 prefix
, yes_no(s
->bus_name_good
));
827 if (UNIT_ISSET(s
->accept_socket
))
829 "%sAccept Socket: %s\n",
830 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
834 "%sTimeoutStartSec: %s\n"
835 "%sTimeoutStopSec: %s\n"
836 "%sRuntimeMaxSec: %s\n"
837 "%sWatchdogSec: %s\n",
838 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
839 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
840 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
841 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
842 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
844 kill_context_dump(&s
->kill_context
, f
, prefix
);
845 exec_context_dump(&s
->exec_context
, f
, prefix
);
847 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
849 if (!s
->exec_command
[c
])
852 fprintf(f
, "%s-> %s:\n",
853 prefix
, service_exec_command_to_string(c
));
855 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
859 fprintf(f
, "%sStatus Text: %s\n",
860 prefix
, s
->status_text
);
862 if (s
->n_fd_store_max
> 0)
864 "%sFile Descriptor Store Max: %u\n"
865 "%sFile Descriptor Store Current: %zu\n",
866 prefix
, s
->n_fd_store_max
,
867 prefix
, s
->n_fd_store
);
869 cgroup_context_dump(&s
->cgroup_context
, f
, prefix
);
872 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
876 assert(pid_is_valid(pid
));
878 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
879 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
882 if (pid
== getpid_cached() || pid
== 1) {
883 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the manager, refusing.", pid
);
887 if (pid
== s
->control_pid
) {
888 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" is the control process, refusing.", pid
);
892 if (!pid_is_alive(pid
)) {
893 log_unit_full(UNIT(s
), prio
, 0, "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
897 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
898 if (owner
== UNIT(s
)) {
899 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
900 return 1; /* Yay, it's definitely a good PID */
903 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
906 static int service_load_pid_file(Service
*s
, bool may_warn
) {
907 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
908 bool questionable_pid_file
= false;
909 _cleanup_free_
char *k
= NULL
;
910 _cleanup_close_
int fd
= -1;
919 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
921 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
|CHASE_SAFE
, NULL
);
923 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
);
925 questionable_pid_file
= true;
927 fd
= chase_symlinks(s
->pid_file
, NULL
, CHASE_OPEN
, NULL
);
930 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
));
932 /* 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. */
933 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
934 r
= read_one_line_file(procfs
, &k
);
936 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
);
938 r
= parse_pid(k
, &pid
);
940 return log_unit_full(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
942 if (s
->main_pid_known
&& pid
== s
->main_pid
)
945 r
= service_is_suitable_main_pid(s
, pid
, prio
);
951 if (questionable_pid_file
) {
952 log_unit_error(UNIT(s
), "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
956 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
958 if (fstat(fd
, &st
) < 0)
959 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
961 if (st
.st_uid
!= 0) {
962 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
);
966 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
);
969 if (s
->main_pid_known
) {
970 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
972 service_unwatch_main_pid(s
);
973 s
->main_pid_known
= false;
975 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
977 r
= service_set_main_pid(s
, pid
);
981 r
= unit_watch_pid(UNIT(s
), pid
);
982 if (r
< 0) /* FIXME: we need to do something here */
983 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
988 static void service_search_main_pid(Service
*s
) {
994 /* If we know it anyway, don't ever fallback to unreliable
996 if (s
->main_pid_known
)
999 if (!s
->guess_main_pid
)
1002 assert(s
->main_pid
<= 0);
1004 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1007 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1008 if (service_set_main_pid(s
, pid
) < 0)
1011 r
= unit_watch_pid(UNIT(s
), pid
);
1013 /* FIXME: we need to do something here */
1014 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1017 static void service_set_state(Service
*s
, ServiceState state
) {
1018 ServiceState old_state
;
1019 const UnitActiveState
*table
;
1023 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1025 old_state
= s
->state
;
1028 service_unwatch_pid_file(s
);
1031 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1034 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1035 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1036 SERVICE_AUTO_RESTART
))
1037 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1040 SERVICE_START
, SERVICE_START_POST
,
1041 SERVICE_RUNNING
, SERVICE_RELOAD
,
1042 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1043 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1044 service_unwatch_main_pid(s
);
1045 s
->main_command
= NULL
;
1049 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1051 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1052 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1053 service_unwatch_control_pid(s
);
1054 s
->control_command
= NULL
;
1055 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1058 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1059 unit_unwatch_all_pids(UNIT(s
));
1060 unit_dequeue_rewatch_pids(UNIT(s
));
1064 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1065 SERVICE_RUNNING
, SERVICE_RELOAD
,
1066 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1067 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1068 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1069 service_close_socket_fd(s
);
1071 if (state
!= SERVICE_START
)
1072 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1074 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1075 service_stop_watchdog(s
);
1077 /* For the inactive states unit_notify() will trim the cgroup,
1078 * but for exit we have to do that ourselves... */
1079 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1080 unit_prune_cgroup(UNIT(s
));
1082 if (old_state
!= state
)
1083 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1085 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1086 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1087 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1090 static usec_t
service_coldplug_timeout(Service
*s
) {
1093 switch (s
->deserialized_state
) {
1095 case SERVICE_START_PRE
:
1097 case SERVICE_START_POST
:
1098 case SERVICE_RELOAD
:
1099 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1101 case SERVICE_RUNNING
:
1102 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1105 case SERVICE_STOP_WATCHDOG
:
1106 case SERVICE_STOP_SIGTERM
:
1107 case SERVICE_STOP_SIGKILL
:
1108 case SERVICE_STOP_POST
:
1109 case SERVICE_FINAL_SIGTERM
:
1110 case SERVICE_FINAL_SIGKILL
:
1111 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1113 case SERVICE_AUTO_RESTART
:
1114 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1117 return USEC_INFINITY
;
1121 static int service_coldplug(Unit
*u
) {
1122 Service
*s
= SERVICE(u
);
1126 assert(s
->state
== SERVICE_DEAD
);
1128 if (s
->deserialized_state
== s
->state
)
1131 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1135 if (s
->main_pid
> 0 &&
1136 pid_is_unwaited(s
->main_pid
) &&
1137 (IN_SET(s
->deserialized_state
,
1138 SERVICE_START
, SERVICE_START_POST
,
1139 SERVICE_RUNNING
, SERVICE_RELOAD
,
1140 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1141 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1142 r
= unit_watch_pid(UNIT(s
), s
->main_pid
);
1147 if (s
->control_pid
> 0 &&
1148 pid_is_unwaited(s
->control_pid
) &&
1149 IN_SET(s
->deserialized_state
,
1150 SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1152 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1153 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1154 r
= unit_watch_pid(UNIT(s
), s
->control_pid
);
1159 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1160 (void) unit_enqueue_rewatch_pids(u
);
1161 (void) unit_setup_dynamic_creds(u
);
1162 (void) unit_setup_exec_runtime(u
);
1165 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1166 service_start_watchdog(s
);
1168 if (UNIT_ISSET(s
->accept_socket
)) {
1169 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1171 if (socket
->max_connections_per_source
> 0) {
1174 /* Make a best-effort attempt at bumping the connection count */
1175 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1176 socket_peer_unref(s
->peer
);
1182 service_set_state(s
, s
->deserialized_state
);
1186 static int service_collect_fds(
1190 size_t *n_socket_fds
,
1191 size_t *n_storage_fds
) {
1193 _cleanup_strv_free_
char **rfd_names
= NULL
;
1194 _cleanup_free_
int *rfds
= NULL
;
1195 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1201 assert(n_socket_fds
);
1202 assert(n_storage_fds
);
1204 if (s
->socket_fd
>= 0) {
1206 /* Pass the per-connection socket */
1211 rfds
[0] = s
->socket_fd
;
1213 rfd_names
= strv_new("connection", NULL
);
1223 /* Pass all our configured sockets for singleton services */
1225 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
], i
) {
1226 _cleanup_free_
int *cfds
= NULL
;
1230 if (u
->type
!= UNIT_SOCKET
)
1235 cn_fds
= socket_collect_fds(sock
, &cfds
);
1243 rfds
= TAKE_PTR(cfds
);
1244 rn_socket_fds
= cn_fds
;
1248 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1252 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1255 rn_socket_fds
+= cn_fds
;
1258 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1264 if (s
->n_fd_store
> 0) {
1270 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1276 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1281 n_fds
= rn_socket_fds
;
1283 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1284 rfds
[n_fds
] = fs
->fd
;
1285 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1286 if (!rfd_names
[n_fds
])
1293 rfd_names
[n_fds
] = NULL
;
1296 *fds
= TAKE_PTR(rfds
);
1297 *fd_names
= TAKE_PTR(rfd_names
);
1298 *n_socket_fds
= rn_socket_fds
;
1299 *n_storage_fds
= rn_storage_fds
;
1304 static int service_allocate_exec_fd_event_source(
1307 sd_event_source
**ret_event_source
) {
1309 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1314 assert(ret_event_source
);
1316 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1318 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1320 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1322 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1324 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1326 (void) sd_event_source_set_description(source
, "service event_fd");
1328 r
= sd_event_source_set_io_fd_own(source
, true);
1330 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1332 *ret_event_source
= TAKE_PTR(source
);
1336 static int service_allocate_exec_fd(
1338 sd_event_source
**ret_event_source
,
1341 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1345 assert(ret_event_source
);
1346 assert(ret_exec_fd
);
1348 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1349 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1351 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1356 *ret_exec_fd
= TAKE_FD(p
[1]);
1361 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1364 /* Notifications are accepted depending on the process and
1365 * the access setting of the service:
1366 * process: \ access: NONE MAIN EXEC ALL
1367 * main no yes yes yes
1368 * control no no yes yes
1369 * other (forked) no no no yes */
1371 if (flags
& EXEC_IS_CONTROL
)
1372 /* A control process */
1373 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1375 /* We only spawn main processes and control processes, so any
1376 * process that is not a control process is a main process */
1377 return s
->notify_access
!= NOTIFY_NONE
;
1380 static int service_spawn(
1387 ExecParameters exec_params
= {
1394 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
, **fd_names
= NULL
;
1395 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1396 size_t n_socket_fds
= 0, n_storage_fds
= 0, n_env
= 0;
1397 _cleanup_close_
int exec_fd
= -1;
1398 _cleanup_free_
int *fds
= NULL
;
1406 r
= unit_prepare_exec(UNIT(s
));
1410 if (flags
& EXEC_IS_CONTROL
) {
1411 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1412 if (s
->permissions_start_only
)
1413 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1414 if (s
->root_directory_start_only
)
1415 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1418 if ((flags
& EXEC_PASS_FDS
) ||
1419 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1420 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1421 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1423 r
= service_collect_fds(s
, &fds
, &fd_names
, &n_socket_fds
, &n_storage_fds
);
1427 log_unit_debug(UNIT(s
), "Passing %zu fds to service", n_socket_fds
+ n_storage_fds
);
1430 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1431 assert(!s
->exec_fd_event_source
);
1433 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_fd
);
1438 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1442 our_env
= new0(char*, 9);
1446 if (service_exec_needs_notify_socket(s
, flags
))
1447 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1450 if (s
->main_pid
> 0)
1451 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1454 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1455 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1458 if (s
->socket_fd
>= 0) {
1459 union sockaddr_union sa
;
1460 socklen_t salen
= sizeof(sa
);
1462 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1463 * useful. Note that we do this only when we are still connected at this point in time, which we might
1464 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1465 * in ENOTCONN), and just use whate we can use. */
1467 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1468 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1470 _cleanup_free_
char *addr
= NULL
;
1474 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1478 t
= strappend("REMOTE_ADDR=", addr
);
1481 our_env
[n_env
++] = t
;
1483 r
= sockaddr_port(&sa
.sa
, &port
);
1487 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1489 our_env
[n_env
++] = t
;
1493 if (flags
& EXEC_SETENV_RESULT
) {
1494 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1497 if (s
->main_exec_status
.pid
> 0 &&
1498 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1499 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1502 if (s
->main_exec_status
.code
== CLD_EXITED
)
1503 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1505 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1511 unit_set_exec_params(UNIT(s
), &exec_params
);
1513 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1517 /* System services should get a new keyring by default. */
1518 SET_FLAG(exec_params
.flags
, EXEC_NEW_KEYRING
, MANAGER_IS_SYSTEM(UNIT(s
)->manager
));
1520 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1521 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1522 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1524 exec_params
.environment
= final_env
;
1525 exec_params
.fds
= fds
;
1526 exec_params
.fd_names
= fd_names
;
1527 exec_params
.n_socket_fds
= n_socket_fds
;
1528 exec_params
.n_storage_fds
= n_storage_fds
;
1529 exec_params
.watchdog_usec
= s
->watchdog_usec
;
1530 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1531 if (s
->type
== SERVICE_IDLE
)
1532 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1533 exec_params
.stdin_fd
= s
->stdin_fd
;
1534 exec_params
.stdout_fd
= s
->stdout_fd
;
1535 exec_params
.stderr_fd
= s
->stderr_fd
;
1536 exec_params
.exec_fd
= exec_fd
;
1538 r
= exec_spawn(UNIT(s
),
1548 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1549 s
->exec_fd_hot
= false;
1551 r
= unit_watch_pid(UNIT(s
), pid
);
1552 if (r
< 0) /* FIXME: we need to do something here */
1560 static int main_pid_good(Service
*s
) {
1563 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1565 /* If we know the pid file, then let's just check if it is
1567 if (s
->main_pid_known
) {
1569 /* If it's an alien child let's check if it is still
1571 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1572 return pid_is_alive(s
->main_pid
);
1574 /* .. otherwise assume we'll get a SIGCHLD for it,
1575 * which we really should wait for to collect exit
1576 * status and code */
1577 return s
->main_pid
> 0;
1580 /* We don't know the pid */
1584 static int control_pid_good(Service
*s
) {
1587 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1588 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1589 * means: we can't figure it out. */
1591 return s
->control_pid
> 0;
1594 static int cgroup_good(Service
*s
) {
1599 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1602 if (!UNIT(s
)->cgroup_path
)
1605 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1612 static bool service_shall_restart(Service
*s
) {
1615 /* Don't restart after manual stops */
1616 if (s
->forbid_restart
)
1619 /* Never restart if this is configured as special exception */
1620 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1623 /* Restart if the exit code/status are configured as restart triggers */
1624 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
))
1627 switch (s
->restart
) {
1629 case SERVICE_RESTART_NO
:
1632 case SERVICE_RESTART_ALWAYS
:
1635 case SERVICE_RESTART_ON_SUCCESS
:
1636 return s
->result
== SERVICE_SUCCESS
;
1638 case SERVICE_RESTART_ON_FAILURE
:
1639 return s
->result
!= SERVICE_SUCCESS
;
1641 case SERVICE_RESTART_ON_ABNORMAL
:
1642 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
);
1644 case SERVICE_RESTART_ON_WATCHDOG
:
1645 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1647 case SERVICE_RESTART_ON_ABORT
:
1648 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1651 assert_not_reached("unknown restart setting");
1655 static bool service_will_restart(Unit
*u
) {
1656 Service
*s
= SERVICE(u
);
1660 if (s
->will_auto_restart
)
1662 if (s
->state
== SERVICE_AUTO_RESTART
)
1666 if (UNIT(s
)->job
->type
== JOB_START
)
1672 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1677 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1678 * undo what has already been enqueued. */
1679 if (unit_stop_pending(UNIT(s
)))
1680 allow_restart
= false;
1682 if (s
->result
== SERVICE_SUCCESS
)
1685 if (s
->result
!= SERVICE_SUCCESS
)
1686 log_unit_warning(UNIT(s
), "Failed with result '%s'.", service_result_to_string(s
->result
));
1688 if (allow_restart
&& service_shall_restart(s
))
1689 s
->will_auto_restart
= true;
1691 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1692 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1693 s
->n_keep_fd_store
++;
1695 service_set_state(s
, s
->result
!= SERVICE_SUCCESS
? SERVICE_FAILED
: SERVICE_DEAD
);
1697 if (s
->will_auto_restart
) {
1698 s
->will_auto_restart
= false;
1700 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1702 s
->n_keep_fd_store
--;
1706 service_set_state(s
, SERVICE_AUTO_RESTART
);
1708 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1709 * user can still introspect the counter. Do so on the next start. */
1710 s
->flush_n_restarts
= true;
1712 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also readd us to the GC
1713 * queue, so that the fd store is possibly gc'ed again */
1714 s
->n_keep_fd_store
--;
1715 unit_add_to_gc_queue(UNIT(s
));
1717 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1718 s
->forbid_restart
= false;
1720 /* We want fresh tmpdirs in case service is started again immediately */
1721 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1723 if (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
1724 (s
->exec_context
.runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !service_will_restart(UNIT(s
))))
1725 /* Also, remove the runtime directory */
1726 exec_context_destroy_runtime_directory(&s
->exec_context
, UNIT(s
)->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
1728 /* Get rid of the IPC bits of the user */
1729 unit_unref_uid_gid(UNIT(s
), true);
1731 /* Release the user, and destroy it if we are the only remaining owner */
1732 dynamic_creds_destroy(&s
->dynamic_creds
);
1734 /* Try to delete the pid file. At this point it will be
1735 * out-of-date, and some software might be confused by it, so
1736 * let's remove it. */
1738 (void) unlink(s
->pid_file
);
1743 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1744 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1747 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1751 if (s
->result
== SERVICE_SUCCESS
)
1754 service_unwatch_control_pid(s
);
1755 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1757 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1758 if (s
->control_command
) {
1759 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1761 r
= service_spawn(s
,
1763 s
->timeout_stop_usec
,
1764 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
,
1769 service_set_state(s
, SERVICE_STOP_POST
);
1771 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1776 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1777 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1780 static int state_to_kill_operation(ServiceState state
) {
1783 case SERVICE_STOP_WATCHDOG
:
1784 return KILL_WATCHDOG
;
1786 case SERVICE_STOP_SIGTERM
:
1787 case SERVICE_FINAL_SIGTERM
:
1788 return KILL_TERMINATE
;
1790 case SERVICE_STOP_SIGKILL
:
1791 case SERVICE_FINAL_SIGKILL
:
1795 return _KILL_OPERATION_INVALID
;
1799 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1804 if (s
->result
== SERVICE_SUCCESS
)
1807 /* Before sending any signal, make sure we track all members of this cgroup */
1808 (void) unit_watch_all_pids(UNIT(s
));
1810 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1812 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1814 r
= unit_kill_context(
1817 state_to_kill_operation(state
),
1825 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1829 service_set_state(s
, state
);
1830 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1831 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1832 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1833 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1834 else if (state
== SERVICE_FINAL_SIGTERM
&& s
->kill_context
.send_sigkill
)
1835 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1837 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1842 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1844 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1845 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1847 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1850 static void service_enter_stop_by_notify(Service
*s
) {
1853 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1855 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1857 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1858 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1861 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1866 if (s
->result
== SERVICE_SUCCESS
)
1869 service_unwatch_control_pid(s
);
1870 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1872 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1873 if (s
->control_command
) {
1874 s
->control_command_id
= SERVICE_EXEC_STOP
;
1876 r
= service_spawn(s
,
1878 s
->timeout_stop_usec
,
1879 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
,
1884 service_set_state(s
, SERVICE_STOP
);
1886 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1891 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1892 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1895 static bool service_good(Service
*s
) {
1899 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1902 main_pid_ok
= main_pid_good(s
);
1903 if (main_pid_ok
> 0) /* It's alive */
1905 if (main_pid_ok
== 0) /* It's dead */
1908 /* OK, we don't know anything about the main PID, maybe
1909 * because there is none. Let's check the control group
1912 return cgroup_good(s
) != 0;
1915 static void service_enter_running(Service
*s
, ServiceResult f
) {
1918 if (s
->result
== SERVICE_SUCCESS
)
1921 service_unwatch_control_pid(s
);
1923 if (s
->result
!= SERVICE_SUCCESS
)
1924 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1925 else if (service_good(s
)) {
1927 /* If there are any queued up sd_notify() notifications, process them now */
1928 if (s
->notify_state
== NOTIFY_RELOADING
)
1929 service_enter_reload_by_notify(s
);
1930 else if (s
->notify_state
== NOTIFY_STOPPING
)
1931 service_enter_stop_by_notify(s
);
1933 service_set_state(s
, SERVICE_RUNNING
);
1934 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
1937 } else if (s
->remain_after_exit
)
1938 service_set_state(s
, SERVICE_EXITED
);
1940 service_enter_stop(s
, SERVICE_SUCCESS
);
1943 static void service_enter_start_post(Service
*s
) {
1947 service_unwatch_control_pid(s
);
1948 service_reset_watchdog(s
);
1950 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
1951 if (s
->control_command
) {
1952 s
->control_command_id
= SERVICE_EXEC_START_POST
;
1954 r
= service_spawn(s
,
1956 s
->timeout_start_usec
,
1957 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
,
1962 service_set_state(s
, SERVICE_START_POST
);
1964 service_enter_running(s
, SERVICE_SUCCESS
);
1969 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
1970 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
1973 static void service_kill_control_process(Service
*s
) {
1978 if (s
->control_pid
<= 0)
1981 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
1983 _cleanup_free_
char *comm
= NULL
;
1985 (void) get_process_comm(s
->control_pid
, &comm
);
1987 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
1988 s
->control_pid
, strna(comm
));
1992 static void service_enter_start(Service
*s
) {
2000 service_unwatch_control_pid(s
);
2001 service_unwatch_main_pid(s
);
2003 unit_warn_leftover_processes(UNIT(s
));
2005 if (s
->type
== SERVICE_FORKING
) {
2006 s
->control_command_id
= SERVICE_EXEC_START
;
2007 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2009 s
->main_command
= NULL
;
2011 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2012 s
->control_command
= NULL
;
2014 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2018 if (s
->type
!= SERVICE_ONESHOT
) {
2019 /* There's no command line configured for the main command? Hmm, that is strange. This can only
2020 * happen if the configuration changes at runtime. In this case, let's enter a failure
2022 log_unit_error(UNIT(s
), "There's no 'start' task anymore we could start.");
2027 service_enter_start_post(s
);
2031 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2032 /* For simple + idle this is the main process. We don't apply any timeout here, but
2033 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2034 timeout
= USEC_INFINITY
;
2036 timeout
= s
->timeout_start_usec
;
2038 r
= service_spawn(s
,
2041 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2046 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2047 /* For simple services we immediately start
2048 * the START_POST binaries. */
2050 service_set_main_pid(s
, pid
);
2051 service_enter_start_post(s
);
2053 } else if (s
->type
== SERVICE_FORKING
) {
2055 /* For forking services we wait until the start
2056 * process exited. */
2058 s
->control_pid
= pid
;
2059 service_set_state(s
, SERVICE_START
);
2061 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2063 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2065 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2066 * bus. 'notify' and 'exec' services are similar. */
2068 service_set_main_pid(s
, pid
);
2069 service_set_state(s
, SERVICE_START
);
2071 assert_not_reached("Unknown service type");
2076 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2077 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2080 static void service_enter_start_pre(Service
*s
) {
2085 service_unwatch_control_pid(s
);
2087 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2088 if (s
->control_command
) {
2090 unit_warn_leftover_processes(UNIT(s
));
2092 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2094 r
= service_spawn(s
,
2096 s
->timeout_start_usec
,
2097 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2102 service_set_state(s
, SERVICE_START_PRE
);
2104 service_enter_start(s
);
2109 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2110 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2113 static void service_enter_restart(Service
*s
) {
2114 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2119 if (UNIT(s
)->job
&& UNIT(s
)->job
->type
== JOB_STOP
) {
2120 /* Don't restart things if we are going down anyway */
2121 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2123 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2130 /* Any units that are bound to this service must also be
2131 * restarted. We use JOB_RESTART (instead of the more obvious
2132 * JOB_START) here so that those dependency jobs will be added
2134 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_FAIL
, &error
, NULL
);
2138 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2139 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2140 * explicitly however via the usual "systemctl reset-failure" logic. */
2142 s
->flush_n_restarts
= false;
2144 log_struct(LOG_INFO
,
2145 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2146 LOG_UNIT_ID(UNIT(s
)),
2147 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2148 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2149 "N_RESTARTS=%u", s
->n_restarts
);
2151 /* Notify clients about changed restart counter */
2152 unit_add_to_dbus_queue(UNIT(s
));
2154 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2155 * it will be canceled as part of the service_stop() call that
2156 * is executed as part of JOB_RESTART. */
2161 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, -r
));
2162 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2165 static void service_enter_reload_by_notify(Service
*s
) {
2166 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2171 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2172 service_set_state(s
, SERVICE_RELOAD
);
2174 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2175 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2177 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, -r
));
2180 static void service_enter_reload(Service
*s
) {
2185 service_unwatch_control_pid(s
);
2186 s
->reload_result
= SERVICE_SUCCESS
;
2188 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2189 if (s
->control_command
) {
2190 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2192 r
= service_spawn(s
,
2194 s
->timeout_start_usec
,
2195 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
,
2200 service_set_state(s
, SERVICE_RELOAD
);
2202 service_enter_running(s
, SERVICE_SUCCESS
);
2207 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2208 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2209 service_enter_running(s
, SERVICE_SUCCESS
);
2212 static void service_run_next_control(Service
*s
) {
2217 assert(s
->control_command
);
2218 assert(s
->control_command
->command_next
);
2220 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2222 s
->control_command
= s
->control_command
->command_next
;
2223 service_unwatch_control_pid(s
);
2225 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2226 timeout
= s
->timeout_start_usec
;
2228 timeout
= s
->timeout_stop_usec
;
2230 r
= service_spawn(s
,
2233 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2234 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2235 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0),
2243 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2245 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2246 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2247 else if (s
->state
== SERVICE_STOP_POST
)
2248 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2249 else if (s
->state
== SERVICE_RELOAD
) {
2250 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2251 service_enter_running(s
, SERVICE_SUCCESS
);
2253 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2256 static void service_run_next_main(Service
*s
) {
2261 assert(s
->main_command
);
2262 assert(s
->main_command
->command_next
);
2263 assert(s
->type
== SERVICE_ONESHOT
);
2265 s
->main_command
= s
->main_command
->command_next
;
2266 service_unwatch_main_pid(s
);
2268 r
= service_spawn(s
,
2270 s
->timeout_start_usec
,
2271 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2276 service_set_main_pid(s
, pid
);
2281 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2282 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2285 static int service_start(Unit
*u
) {
2286 Service
*s
= SERVICE(u
);
2291 /* We cannot fulfill this request right now, try again later
2293 if (IN_SET(s
->state
,
2294 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2295 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2298 /* Already on it! */
2299 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2302 /* A service that will be restarted must be stopped first to
2303 * trigger BindsTo and/or OnFailure dependencies. If a user
2304 * does not want to wait for the holdoff time to elapse, the
2305 * service should be manually restarted, not started. We
2306 * simply return EAGAIN here, so that any start jobs stay
2307 * queued, and assume that the auto restart timer will
2308 * eventually trigger the restart. */
2309 if (s
->state
== SERVICE_AUTO_RESTART
)
2312 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2314 /* Make sure we don't enter a busy loop of some kind. */
2315 r
= unit_start_limit_test(u
);
2317 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2321 r
= unit_acquire_invocation_id(u
);
2325 s
->result
= SERVICE_SUCCESS
;
2326 s
->reload_result
= SERVICE_SUCCESS
;
2327 s
->main_pid_known
= false;
2328 s
->main_pid_alien
= false;
2329 s
->forbid_restart
= false;
2331 s
->status_text
= mfree(s
->status_text
);
2332 s
->status_errno
= 0;
2334 s
->notify_state
= NOTIFY_UNKNOWN
;
2336 s
->watchdog_override_enable
= false;
2337 s
->watchdog_override_usec
= 0;
2339 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2340 exec_status_reset(&s
->main_exec_status
);
2342 /* This is not an automatic restart? Flush the restart counter then */
2343 if (s
->flush_n_restarts
) {
2345 s
->flush_n_restarts
= false;
2348 u
->reset_accounting
= true;
2350 service_enter_start_pre(s
);
2354 static int service_stop(Unit
*u
) {
2355 Service
*s
= SERVICE(u
);
2359 /* Don't create restart jobs from manual stops. */
2360 s
->forbid_restart
= true;
2363 if (IN_SET(s
->state
,
2364 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2365 SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2368 /* A restart will be scheduled or is in progress. */
2369 if (s
->state
== SERVICE_AUTO_RESTART
) {
2370 service_set_state(s
, SERVICE_DEAD
);
2374 /* If there's already something running we go directly into
2376 if (IN_SET(s
->state
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
)) {
2377 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2381 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2383 service_enter_stop(s
, SERVICE_SUCCESS
);
2387 static int service_reload(Unit
*u
) {
2388 Service
*s
= SERVICE(u
);
2392 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2394 service_enter_reload(s
);
2398 _pure_
static bool service_can_reload(Unit
*u
) {
2399 Service
*s
= SERVICE(u
);
2403 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2406 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2407 Service
*s
= SERVICE(u
);
2409 ExecCommand
*first
, *c
;
2413 first
= s
->exec_command
[id
];
2415 /* Figure out where we are in the list by walking back to the beginning */
2416 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2422 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2423 Service
*s
= SERVICE(u
);
2424 ServiceExecCommand id
;
2428 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2429 size_t allocated
= 0, length
= 0;
2437 if (command
== s
->control_command
) {
2439 id
= s
->control_command_id
;
2442 id
= SERVICE_EXEC_START
;
2445 idx
= service_exec_command_index(u
, id
, command
);
2447 STRV_FOREACH(arg
, command
->argv
) {
2449 _cleanup_free_
char *e
= NULL
;
2451 e
= xescape(*arg
, WHITESPACE
);
2456 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1 + n
+ 1))
2460 args
[length
++] = ' ';
2462 memcpy(args
+ length
, e
, n
);
2466 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2470 p
= xescape(command
->path
, WHITESPACE
);
2474 fprintf(f
, "%s-command=%s %u %s %s\n", type
, service_exec_command_to_string(id
), idx
, p
, args
);
2479 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2480 Service
*s
= SERVICE(u
);
2488 unit_serialize_item(u
, f
, "state", service_state_to_string(s
->state
));
2489 unit_serialize_item(u
, f
, "result", service_result_to_string(s
->result
));
2490 unit_serialize_item(u
, f
, "reload-result", service_result_to_string(s
->reload_result
));
2492 if (s
->control_pid
> 0)
2493 unit_serialize_item_format(u
, f
, "control-pid", PID_FMT
, s
->control_pid
);
2495 if (s
->main_pid_known
&& s
->main_pid
> 0)
2496 unit_serialize_item_format(u
, f
, "main-pid", PID_FMT
, s
->main_pid
);
2498 unit_serialize_item(u
, f
, "main-pid-known", yes_no(s
->main_pid_known
));
2499 unit_serialize_item(u
, f
, "bus-name-good", yes_no(s
->bus_name_good
));
2500 unit_serialize_item(u
, f
, "bus-name-owner", s
->bus_name_owner
);
2502 unit_serialize_item_format(u
, f
, "n-restarts", "%u", s
->n_restarts
);
2503 unit_serialize_item(u
, f
, "flush-n-restarts", yes_no(s
->flush_n_restarts
));
2505 r
= unit_serialize_item_escaped(u
, f
, "status-text", s
->status_text
);
2509 service_serialize_exec_command(u
, f
, s
->control_command
);
2510 service_serialize_exec_command(u
, f
, s
->main_command
);
2512 r
= unit_serialize_item_fd(u
, f
, fds
, "stdin-fd", s
->stdin_fd
);
2515 r
= unit_serialize_item_fd(u
, f
, fds
, "stdout-fd", s
->stdout_fd
);
2518 r
= unit_serialize_item_fd(u
, f
, fds
, "stderr-fd", s
->stderr_fd
);
2522 if (s
->exec_fd_event_source
) {
2523 r
= unit_serialize_item_fd(u
, f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2526 unit_serialize_item(u
, f
, "exec-fd-hot", yes_no(s
->exec_fd_hot
));
2529 if (UNIT_ISSET(s
->accept_socket
)) {
2530 r
= unit_serialize_item(u
, f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2535 r
= unit_serialize_item_fd(u
, f
, fds
, "socket-fd", s
->socket_fd
);
2539 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2540 _cleanup_free_
char *c
= NULL
;
2543 copy
= fdset_put_dup(fds
, fs
->fd
);
2547 c
= cescape(fs
->fdname
);
2549 unit_serialize_item_format(u
, f
, "fd-store-fd", "%i %s", copy
, strempty(c
));
2552 if (s
->main_exec_status
.pid
> 0) {
2553 unit_serialize_item_format(u
, f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2554 dual_timestamp_serialize(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2555 dual_timestamp_serialize(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2557 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2558 unit_serialize_item_format(u
, f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2559 unit_serialize_item_format(u
, f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2563 dual_timestamp_serialize(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2565 unit_serialize_item(u
, f
, "forbid-restart", yes_no(s
->forbid_restart
));
2567 if (s
->watchdog_override_enable
)
2568 unit_serialize_item_format(u
, f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2573 static int service_deserialize_exec_command(Unit
*u
, const char *key
, const char *value
) {
2574 Service
*s
= SERVICE(u
);
2576 unsigned idx
= 0, i
;
2577 bool control
, found
= false;
2578 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2579 ExecCommand
*command
= NULL
;
2580 _cleanup_free_
char *path
= NULL
;
2581 _cleanup_strv_free_
char **argv
= NULL
;
2583 enum ExecCommandState
{
2584 STATE_EXEC_COMMAND_TYPE
,
2585 STATE_EXEC_COMMAND_INDEX
,
2586 STATE_EXEC_COMMAND_PATH
,
2587 STATE_EXEC_COMMAND_ARGS
,
2588 _STATE_EXEC_COMMAND_MAX
,
2589 _STATE_EXEC_COMMAND_INVALID
= -1,
2596 control
= streq(key
, "control-command");
2598 state
= STATE_EXEC_COMMAND_TYPE
;
2601 _cleanup_free_
char *arg
= NULL
;
2603 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
);
2610 case STATE_EXEC_COMMAND_TYPE
:
2611 id
= service_exec_command_from_string(arg
);
2615 state
= STATE_EXEC_COMMAND_INDEX
;
2617 case STATE_EXEC_COMMAND_INDEX
:
2618 r
= safe_atou(arg
, &idx
);
2622 state
= STATE_EXEC_COMMAND_PATH
;
2624 case STATE_EXEC_COMMAND_PATH
:
2625 path
= TAKE_PTR(arg
);
2626 state
= STATE_EXEC_COMMAND_ARGS
;
2628 if (!path_is_absolute(path
))
2631 case STATE_EXEC_COMMAND_ARGS
:
2632 r
= strv_extend(&argv
, arg
);
2637 assert_not_reached("Unknown error at deserialization of exec command");
2642 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2645 /* Let's check whether exec command on given offset matches data that we just deserialized */
2646 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2650 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2655 /* Command at the index we serialized is different, let's look for command that exactly
2656 * matches but is on different index. If there is no such command we will not resume execution. */
2657 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2658 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2662 if (command
&& control
)
2663 s
->control_command
= command
;
2665 s
->main_command
= command
;
2667 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2672 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2673 Service
*s
= SERVICE(u
);
2681 if (streq(key
, "state")) {
2684 state
= service_state_from_string(value
);
2686 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2688 s
->deserialized_state
= state
;
2689 } else if (streq(key
, "result")) {
2692 f
= service_result_from_string(value
);
2694 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2695 else if (f
!= SERVICE_SUCCESS
)
2698 } else if (streq(key
, "reload-result")) {
2701 f
= service_result_from_string(value
);
2703 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2704 else if (f
!= SERVICE_SUCCESS
)
2705 s
->reload_result
= f
;
2707 } else if (streq(key
, "control-pid")) {
2710 if (parse_pid(value
, &pid
) < 0)
2711 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2713 s
->control_pid
= pid
;
2714 } else if (streq(key
, "main-pid")) {
2717 if (parse_pid(value
, &pid
) < 0)
2718 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2720 (void) service_set_main_pid(s
, pid
);
2721 } else if (streq(key
, "main-pid-known")) {
2724 b
= parse_boolean(value
);
2726 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2728 s
->main_pid_known
= b
;
2729 } else if (streq(key
, "bus-name-good")) {
2732 b
= parse_boolean(value
);
2734 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2736 s
->bus_name_good
= b
;
2737 } else if (streq(key
, "bus-name-owner")) {
2738 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2740 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2741 } else if (streq(key
, "status-text")) {
2744 r
= cunescape(value
, 0, &t
);
2746 log_unit_debug_errno(u
, r
, "Failed to unescape status text: %s", value
);
2748 free(s
->status_text
);
2752 } else if (streq(key
, "accept-socket")) {
2755 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2757 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit: %s", value
);
2759 unit_ref_set(&s
->accept_socket
, u
, socket
);
2760 SOCKET(socket
)->n_connections
++;
2763 } else if (streq(key
, "socket-fd")) {
2766 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2767 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2769 asynchronous_close(s
->socket_fd
);
2770 s
->socket_fd
= fdset_remove(fds
, fd
);
2772 } else if (streq(key
, "fd-store-fd")) {
2777 pf
= strcspn(value
, WHITESPACE
);
2778 fdv
= strndupa(value
, pf
);
2780 if (safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2781 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2783 _cleanup_free_
char *t
= NULL
;
2787 fdn
+= strspn(fdn
, WHITESPACE
);
2788 (void) cunescape(fdn
, 0, &t
);
2790 r
= service_add_fd_store(s
, fd
, t
);
2792 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2794 fdset_remove(fds
, fd
);
2797 } else if (streq(key
, "main-exec-status-pid")) {
2800 if (parse_pid(value
, &pid
) < 0)
2801 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2803 s
->main_exec_status
.pid
= pid
;
2804 } else if (streq(key
, "main-exec-status-code")) {
2807 if (safe_atoi(value
, &i
) < 0)
2808 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2810 s
->main_exec_status
.code
= i
;
2811 } else if (streq(key
, "main-exec-status-status")) {
2814 if (safe_atoi(value
, &i
) < 0)
2815 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2817 s
->main_exec_status
.status
= i
;
2818 } else if (streq(key
, "main-exec-status-start"))
2819 dual_timestamp_deserialize(value
, &s
->main_exec_status
.start_timestamp
);
2820 else if (streq(key
, "main-exec-status-exit"))
2821 dual_timestamp_deserialize(value
, &s
->main_exec_status
.exit_timestamp
);
2822 else if (streq(key
, "watchdog-timestamp"))
2823 dual_timestamp_deserialize(value
, &s
->watchdog_timestamp
);
2824 else if (streq(key
, "forbid-restart")) {
2827 b
= parse_boolean(value
);
2829 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2831 s
->forbid_restart
= b
;
2832 } else if (streq(key
, "stdin-fd")) {
2835 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2836 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
2838 asynchronous_close(s
->stdin_fd
);
2839 s
->stdin_fd
= fdset_remove(fds
, fd
);
2840 s
->exec_context
.stdio_as_fds
= true;
2842 } else if (streq(key
, "stdout-fd")) {
2845 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2846 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
2848 asynchronous_close(s
->stdout_fd
);
2849 s
->stdout_fd
= fdset_remove(fds
, fd
);
2850 s
->exec_context
.stdio_as_fds
= true;
2852 } else if (streq(key
, "stderr-fd")) {
2855 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2856 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
2858 asynchronous_close(s
->stderr_fd
);
2859 s
->stderr_fd
= fdset_remove(fds
, fd
);
2860 s
->exec_context
.stdio_as_fds
= true;
2862 } else if (streq(key
, "exec-fd")) {
2865 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2866 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
2868 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
2870 fd
= fdset_remove(fds
, fd
);
2871 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
2874 } else if (streq(key
, "watchdog-override-usec")) {
2875 usec_t watchdog_override_usec
;
2876 if (timestamp_deserialize(value
, &watchdog_override_usec
) < 0)
2877 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
2879 s
->watchdog_override_enable
= true;
2880 s
->watchdog_override_usec
= watchdog_override_usec
;
2882 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
2883 r
= service_deserialize_exec_command(u
, key
, value
);
2885 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
2887 } else if (streq(key
, "n-restarts")) {
2888 r
= safe_atou(value
, &s
->n_restarts
);
2890 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
2892 } else if (streq(key
, "flush-n-restarts")) {
2893 r
= parse_boolean(value
);
2895 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
2897 s
->flush_n_restarts
= r
;
2899 log_unit_debug(u
, "Unknown serialization key: %s", key
);
2904 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
2905 const UnitActiveState
*table
;
2909 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
2911 return table
[SERVICE(u
)->state
];
2914 static const char *service_sub_state_to_string(Unit
*u
) {
2917 return service_state_to_string(SERVICE(u
)->state
);
2920 static bool service_may_gc(Unit
*u
) {
2921 Service
*s
= SERVICE(u
);
2925 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
2926 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
2927 * have moved outside of the cgroup. */
2929 if (main_pid_good(s
) > 0 ||
2930 control_pid_good(s
) > 0)
2936 static int service_retry_pid_file(Service
*s
) {
2939 assert(s
->pid_file
);
2940 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
2942 r
= service_load_pid_file(s
, false);
2946 service_unwatch_pid_file(s
);
2948 service_enter_running(s
, SERVICE_SUCCESS
);
2952 static int service_watch_pid_file(Service
*s
) {
2955 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
2957 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
2961 /* the pidfile might have appeared just before we set the watch */
2962 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
2963 service_retry_pid_file(s
);
2967 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
2968 service_unwatch_pid_file(s
);
2972 static int service_demand_pid_file(Service
*s
) {
2975 assert(s
->pid_file
);
2976 assert(!s
->pid_file_pathspec
);
2978 ps
= new0(PathSpec
, 1);
2983 ps
->path
= strdup(s
->pid_file
);
2989 path_simplify(ps
->path
, false);
2991 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2992 * keep their PID file open all the time. */
2993 ps
->type
= PATH_MODIFIED
;
2994 ps
->inotify_fd
= -1;
2996 s
->pid_file_pathspec
= ps
;
2998 return service_watch_pid_file(s
);
3001 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3002 PathSpec
*p
= userdata
;
3007 s
= SERVICE(p
->unit
);
3011 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3012 assert(s
->pid_file_pathspec
);
3013 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3015 log_unit_debug(UNIT(s
), "inotify event");
3017 if (path_spec_fd_event(p
, events
) < 0)
3020 if (service_retry_pid_file(s
) == 0)
3023 if (service_watch_pid_file(s
) < 0)
3029 service_unwatch_pid_file(s
);
3030 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3034 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3035 Service
*s
= SERVICE(userdata
);
3039 log_unit_debug(UNIT(s
), "got exec-fd event");
3041 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3042 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3043 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3044 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3045 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3046 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3047 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3048 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3054 n
= read(fd
, &x
, sizeof(x
));
3056 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3059 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3061 if (n
== 0) { /* EOF → the event we are waiting for */
3063 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3065 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3066 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3068 s
->exec_fd_hot
= false;
3070 /* Nice! This is what we have been waiting for. Transition to next state. */
3071 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3072 service_enter_start_post(s
);
3074 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3079 /* A byte was read → this turns on/off the exec fd logic */
3080 assert(n
== sizeof(x
));
3087 static void service_notify_cgroup_empty_event(Unit
*u
) {
3088 Service
*s
= SERVICE(u
);
3092 log_unit_debug(u
, "cgroup is empty");
3096 /* Waiting for SIGCHLD is usually more interesting,
3097 * because it includes return codes/signals. Which is
3098 * why we ignore the cgroup events for most cases,
3099 * except when we don't know pid which to expect the
3103 if (s
->type
== SERVICE_NOTIFY
&&
3104 main_pid_good(s
) == 0 &&
3105 control_pid_good(s
) == 0) {
3106 /* No chance of getting a ready notification anymore */
3107 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3112 case SERVICE_START_POST
:
3113 if (s
->pid_file_pathspec
&&
3114 main_pid_good(s
) == 0 &&
3115 control_pid_good(s
) == 0) {
3117 /* Give up hoping for the daemon to write its PID file */
3118 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3120 service_unwatch_pid_file(s
);
3121 if (s
->state
== SERVICE_START
)
3122 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3124 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3128 case SERVICE_RUNNING
:
3129 /* service_enter_running() will figure out what to do */
3130 service_enter_running(s
, SERVICE_SUCCESS
);
3133 case SERVICE_STOP_WATCHDOG
:
3134 case SERVICE_STOP_SIGTERM
:
3135 case SERVICE_STOP_SIGKILL
:
3137 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3138 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3142 case SERVICE_STOP_POST
:
3143 case SERVICE_FINAL_SIGTERM
:
3144 case SERVICE_FINAL_SIGKILL
:
3145 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3146 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3155 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3156 bool notify_dbus
= true;
3157 Service
*s
= SERVICE(u
);
3163 if (is_clean_exit(code
, status
, s
->type
== SERVICE_ONESHOT
? EXIT_CLEAN_COMMAND
: EXIT_CLEAN_DAEMON
, &s
->success_status
))
3164 f
= SERVICE_SUCCESS
;
3165 else if (code
== CLD_EXITED
)
3166 f
= SERVICE_FAILURE_EXIT_CODE
;
3167 else if (code
== CLD_KILLED
)
3168 f
= SERVICE_FAILURE_SIGNAL
;
3169 else if (code
== CLD_DUMPED
)
3170 f
= SERVICE_FAILURE_CORE_DUMP
;
3172 assert_not_reached("Unknown code");
3174 if (s
->main_pid
== pid
) {
3175 /* Forking services may occasionally move to a new PID.
3176 * As long as they update the PID file before exiting the old
3177 * PID, they're fine. */
3178 if (service_load_pid_file(s
, false) > 0)
3182 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3184 if (s
->main_command
) {
3185 /* If this is not a forking service than the
3186 * main process got started and hence we copy
3187 * the exit status so that it is recorded both
3188 * as main and as control process exit
3191 s
->main_command
->exec_status
= s
->main_exec_status
;
3193 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3194 f
= SERVICE_SUCCESS
;
3195 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3197 /* If this is a forked process, then we should
3198 * ignore the return value if this was
3199 * configured for the starter process */
3201 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3202 f
= SERVICE_SUCCESS
;
3205 /* When this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
3206 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
3207 * that the service already logged the reason at a higher log level on its own. However, if the service
3208 * died due to a signal, then it most likely didn't say anything about any reason, hence let's raise
3209 * our log level to WARNING then. */
3211 log_struct(f
== SERVICE_SUCCESS
? LOG_DEBUG
:
3212 (code
== CLD_EXITED
? LOG_NOTICE
: LOG_WARNING
),
3213 LOG_UNIT_MESSAGE(u
, "Main process exited, code=%s, status=%i/%s",
3214 sigchld_code_to_string(code
), status
,
3215 strna(code
== CLD_EXITED
3216 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
3217 : signal_to_string(status
))),
3218 "EXIT_CODE=%s", sigchld_code_to_string(code
),
3219 "EXIT_STATUS=%i", status
,
3221 LOG_UNIT_INVOCATION_ID(u
));
3223 if (s
->result
== SERVICE_SUCCESS
)
3226 if (s
->main_command
&&
3227 s
->main_command
->command_next
&&
3228 s
->type
== SERVICE_ONESHOT
&&
3229 f
== SERVICE_SUCCESS
) {
3231 /* There is another command to *
3232 * execute, so let's do that. */
3234 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3235 service_run_next_main(s
);
3239 /* The service exited, so the service is officially
3241 s
->main_command
= NULL
;
3245 case SERVICE_START_POST
:
3246 case SERVICE_RELOAD
:
3248 /* Need to wait until the operation is
3253 if (s
->type
== SERVICE_ONESHOT
) {
3254 /* This was our main goal, so let's go on */
3255 if (f
== SERVICE_SUCCESS
)
3256 service_enter_start_post(s
);
3258 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3260 } else if (s
->type
== SERVICE_NOTIFY
) {
3261 /* Only enter running through a notification, so that the
3262 * SERVICE_START state signifies that no ready notification
3263 * has been received */
3264 if (f
!= SERVICE_SUCCESS
)
3265 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3266 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3267 /* The service has never been and will never be active */
3268 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3273 case SERVICE_RUNNING
:
3274 service_enter_running(s
, f
);
3277 case SERVICE_STOP_WATCHDOG
:
3278 case SERVICE_STOP_SIGTERM
:
3279 case SERVICE_STOP_SIGKILL
:
3281 if (control_pid_good(s
) <= 0)
3282 service_enter_stop_post(s
, f
);
3284 /* If there is still a control process, wait for that first */
3287 case SERVICE_STOP_POST
:
3288 case SERVICE_FINAL_SIGTERM
:
3289 case SERVICE_FINAL_SIGKILL
:
3291 if (control_pid_good(s
) <= 0)
3292 service_enter_dead(s
, f
, true);
3296 assert_not_reached("Uh, main process died at wrong time.");
3300 } else if (s
->control_pid
== pid
) {
3303 if (s
->control_command
) {
3304 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3306 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3307 f
= SERVICE_SUCCESS
;
3310 log_unit_full(u
, f
== SERVICE_SUCCESS
? LOG_DEBUG
: LOG_NOTICE
, 0,
3311 "Control process exited, code=%s status=%i",
3312 sigchld_code_to_string(code
), status
);
3314 if (s
->result
== SERVICE_SUCCESS
)
3317 if (s
->control_command
&&
3318 s
->control_command
->command_next
&&
3319 f
== SERVICE_SUCCESS
) {
3321 /* There is another command to *
3322 * execute, so let's do that. */
3324 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3325 service_run_next_control(s
);
3328 /* No further commands for this step, so let's
3329 * figure out what to do next */
3331 s
->control_command
= NULL
;
3332 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3334 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3338 case SERVICE_START_PRE
:
3339 if (f
== SERVICE_SUCCESS
)
3340 service_enter_start(s
);
3342 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3346 if (s
->type
!= SERVICE_FORKING
)
3347 /* Maybe spurious event due to a reload that changed the type? */
3350 if (f
!= SERVICE_SUCCESS
) {
3351 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3356 bool has_start_post
;
3359 /* Let's try to load the pid file here if we can.
3360 * The PID file might actually be created by a START_POST
3361 * script. In that case don't worry if the loading fails. */
3363 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3364 r
= service_load_pid_file(s
, !has_start_post
);
3365 if (!has_start_post
&& r
< 0) {
3366 r
= service_demand_pid_file(s
);
3367 if (r
< 0 || cgroup_good(s
) == 0)
3368 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3372 service_search_main_pid(s
);
3374 service_enter_start_post(s
);
3377 case SERVICE_START_POST
:
3378 if (f
!= SERVICE_SUCCESS
) {
3379 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3386 r
= service_load_pid_file(s
, true);
3388 r
= service_demand_pid_file(s
);
3389 if (r
< 0 || cgroup_good(s
) == 0)
3390 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3394 service_search_main_pid(s
);
3396 service_enter_running(s
, SERVICE_SUCCESS
);
3399 case SERVICE_RELOAD
:
3400 if (f
== SERVICE_SUCCESS
)
3401 if (service_load_pid_file(s
, true) < 0)
3402 service_search_main_pid(s
);
3404 s
->reload_result
= f
;
3405 service_enter_running(s
, SERVICE_SUCCESS
);
3409 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3412 case SERVICE_STOP_WATCHDOG
:
3413 case SERVICE_STOP_SIGTERM
:
3414 case SERVICE_STOP_SIGKILL
:
3415 if (main_pid_good(s
) <= 0)
3416 service_enter_stop_post(s
, f
);
3418 /* If there is still a service
3419 * process around, wait until
3420 * that one quit, too */
3423 case SERVICE_STOP_POST
:
3424 case SERVICE_FINAL_SIGTERM
:
3425 case SERVICE_FINAL_SIGKILL
:
3426 if (main_pid_good(s
) <= 0)
3427 service_enter_dead(s
, f
, true);
3431 assert_not_reached("Uh, control process died at wrong time.");
3434 } else /* Neither control nor main PID? If so, don't notify about anything */
3435 notify_dbus
= false;
3437 /* Notify clients about changed exit status */
3439 unit_add_to_dbus_queue(u
);
3441 /* If we get a SIGCHLD event for one of the processes we were interested in, then we look for others to watch,
3442 * under the assumption that we'll sooner or later get a SIGCHLD for them, as the original process we watched
3443 * was probably the parent of them, and they are hence now our children. */
3444 (void) unit_enqueue_rewatch_pids(u
);
3447 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3448 Service
*s
= SERVICE(userdata
);
3451 assert(source
== s
->timer_event_source
);
3455 case SERVICE_START_PRE
:
3457 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", s
->state
== SERVICE_START
? "Start" : "Start-pre");
3458 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3461 case SERVICE_START_POST
:
3462 log_unit_warning(UNIT(s
), "Start-post operation timed out. Stopping.");
3463 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3466 case SERVICE_RUNNING
:
3467 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3468 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3471 case SERVICE_RELOAD
:
3472 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3473 service_kill_control_process(s
);
3474 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3475 service_enter_running(s
, SERVICE_SUCCESS
);
3479 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3480 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3483 case SERVICE_STOP_WATCHDOG
:
3484 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Terminating.");
3485 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3488 case SERVICE_STOP_SIGTERM
:
3489 if (s
->kill_context
.send_sigkill
) {
3490 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3491 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3493 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3494 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3499 case SERVICE_STOP_SIGKILL
:
3500 /* Uh, we sent a SIGKILL and it is still not gone?
3501 * Must be something we cannot kill, so let's just be
3502 * weirded out and continue */
3504 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3505 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3508 case SERVICE_STOP_POST
:
3509 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3510 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3513 case SERVICE_FINAL_SIGTERM
:
3514 if (s
->kill_context
.send_sigkill
) {
3515 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Killing.");
3516 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3518 log_unit_warning(UNIT(s
), "State 'stop-final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3519 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3524 case SERVICE_FINAL_SIGKILL
:
3525 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3526 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3529 case SERVICE_AUTO_RESTART
:
3530 if (s
->restart_usec
> 0) {
3531 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3532 log_unit_info(UNIT(s
),
3533 "Service RestartSec=%s expired, scheduling restart.",
3534 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3536 log_unit_info(UNIT(s
),
3537 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3539 service_enter_restart(s
);
3543 assert_not_reached("Timeout at wrong time.");
3549 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3550 Service
*s
= SERVICE(userdata
);
3551 char t
[FORMAT_TIMESPAN_MAX
];
3552 usec_t watchdog_usec
;
3555 assert(source
== s
->watchdog_event_source
);
3557 watchdog_usec
= service_get_watchdog_usec(s
);
3559 if (UNIT(s
)->manager
->service_watchdogs
) {
3560 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3561 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3563 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3565 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3566 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3571 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, char **tags
, FDSet
*fds
) {
3574 if (s
->notify_access
== NOTIFY_NONE
) {
3575 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3579 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3580 if (s
->main_pid
!= 0)
3581 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
);
3583 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
);
3588 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3589 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3590 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
,
3591 pid
, s
->main_pid
, s
->control_pid
);
3592 else if (s
->main_pid
!= 0)
3593 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 else if (s
->control_pid
!= 0)
3595 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
);
3597 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
);
3605 static void service_notify_message(
3607 const struct ucred
*ucred
,
3611 Service
*s
= SERVICE(u
);
3612 bool notify_dbus
= false;
3620 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, tags
, fds
))
3623 if (DEBUG_LOGGING
) {
3624 _cleanup_free_
char *cc
= NULL
;
3626 cc
= strv_join(tags
, ", ");
3627 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
3630 /* Interpret MAINPID= */
3631 e
= strv_find_startswith(tags
, "MAINPID=");
3632 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
3635 if (parse_pid(e
, &new_main_pid
) < 0)
3636 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
3637 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
3639 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
3641 /* The new main PID is a bit suspicous, which is OK if the sender is privileged. */
3643 if (ucred
->uid
== 0) {
3644 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
);
3647 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
3650 service_set_main_pid(s
, new_main_pid
);
3652 r
= unit_watch_pid(UNIT(s
), new_main_pid
);
3654 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
3661 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
3662 STRV_FOREACH_BACKWARDS(i
, tags
) {
3664 if (streq(*i
, "READY=1")) {
3665 s
->notify_state
= NOTIFY_READY
;
3667 /* Type=notify services inform us about completed
3668 * initialization with READY=1 */
3669 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
3670 service_enter_start_post(s
);
3672 /* Sending READY=1 while we are reloading informs us
3673 * that the reloading is complete */
3674 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
3675 service_enter_running(s
, SERVICE_SUCCESS
);
3680 } else if (streq(*i
, "RELOADING=1")) {
3681 s
->notify_state
= NOTIFY_RELOADING
;
3683 if (s
->state
== SERVICE_RUNNING
)
3684 service_enter_reload_by_notify(s
);
3689 } else if (streq(*i
, "STOPPING=1")) {
3690 s
->notify_state
= NOTIFY_STOPPING
;
3692 if (s
->state
== SERVICE_RUNNING
)
3693 service_enter_stop_by_notify(s
);
3700 /* Interpret STATUS= */
3701 e
= strv_find_startswith(tags
, "STATUS=");
3703 _cleanup_free_
char *t
= NULL
;
3706 if (!utf8_is_valid(e
))
3707 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean.");
3715 if (!streq_ptr(s
->status_text
, t
)) {
3716 free_and_replace(s
->status_text
, t
);
3721 /* Interpret ERRNO= */
3722 e
= strv_find_startswith(tags
, "ERRNO=");
3726 status_errno
= parse_errno(e
);
3727 if (status_errno
< 0)
3728 log_unit_warning_errno(u
, status_errno
,
3729 "Failed to parse ERRNO= field in notification message: %s", e
);
3730 else if (s
->status_errno
!= status_errno
) {
3731 s
->status_errno
= status_errno
;
3736 /* Interpret EXTEND_TIMEOUT= */
3737 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
3739 usec_t extend_timeout_usec
;
3740 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
3741 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
3743 service_extend_timeout(s
, extend_timeout_usec
);
3746 /* Interpret WATCHDOG= */
3747 if (strv_find(tags
, "WATCHDOG=1"))
3748 service_reset_watchdog(s
);
3750 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
3752 usec_t watchdog_override_usec
;
3753 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
3754 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
3756 service_reset_watchdog_timeout(s
, watchdog_override_usec
);
3759 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
3760 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
3761 * fds, but optional when pushing in new fds, for compatibility reasons. */
3762 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
3765 name
= strv_find_startswith(tags
, "FDNAME=");
3766 if (!name
|| !fdname_is_valid(name
))
3767 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
3769 service_remove_fd_store(s
, name
);
3771 } else if (strv_find(tags
, "FDSTORE=1")) {
3774 name
= strv_find_startswith(tags
, "FDNAME=");
3775 if (name
&& !fdname_is_valid(name
)) {
3776 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
3780 (void) service_add_fd_store_set(s
, fds
, name
);
3783 /* Notify clients about changed status or main pid */
3785 unit_add_to_dbus_queue(u
);
3788 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
3789 Service
*s
= SERVICE(u
);
3793 if (!s
->timer_event_source
)
3796 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
3799 if (t
== USEC_INFINITY
)
3806 static void service_bus_name_owner_change(
3809 const char *old_owner
,
3810 const char *new_owner
) {
3812 Service
*s
= SERVICE(u
);
3818 assert(streq(s
->bus_name
, name
));
3819 assert(old_owner
|| new_owner
);
3821 if (old_owner
&& new_owner
)
3822 log_unit_debug(u
, "D-Bus name %s changed owner from %s to %s", name
, old_owner
, new_owner
);
3824 log_unit_debug(u
, "D-Bus name %s no longer registered by %s", name
, old_owner
);
3826 log_unit_debug(u
, "D-Bus name %s now registered by %s", name
, new_owner
);
3828 s
->bus_name_good
= !!new_owner
;
3830 /* Track the current owner, so we can reconstruct changes after a daemon reload */
3831 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
3833 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
3837 if (s
->type
== SERVICE_DBUS
) {
3839 /* service_enter_running() will figure out what to
3841 if (s
->state
== SERVICE_RUNNING
)
3842 service_enter_running(s
, SERVICE_SUCCESS
);
3843 else if (s
->state
== SERVICE_START
&& new_owner
)
3844 service_enter_start_post(s
);
3846 } else if (new_owner
&&
3854 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
3857 /* Try to acquire PID from bus service */
3859 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, name
, SD_BUS_CREDS_PID
, &creds
);
3861 r
= sd_bus_creds_get_pid(creds
, &pid
);
3863 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, name
, pid
);
3865 service_set_main_pid(s
, pid
);
3866 unit_watch_pid(UNIT(s
), pid
);
3871 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
3872 _cleanup_free_
char *peer
= NULL
;
3878 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
3879 * to be configured. We take ownership of the passed fd on success. */
3881 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
3884 if (s
->socket_fd
>= 0)
3887 if (s
->state
!= SERVICE_DEAD
)
3890 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
3892 if (UNIT(s
)->description
) {
3893 _cleanup_free_
char *a
;
3895 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
3899 r
= unit_set_description(UNIT(s
), a
);
3901 r
= unit_set_description(UNIT(s
), peer
);
3907 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
3912 s
->socket_fd_selinux_context_net
= selinux_context_net
;
3914 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
3918 static void service_reset_failed(Unit
*u
) {
3919 Service
*s
= SERVICE(u
);
3923 if (s
->state
== SERVICE_FAILED
)
3924 service_set_state(s
, SERVICE_DEAD
);
3926 s
->result
= SERVICE_SUCCESS
;
3927 s
->reload_result
= SERVICE_SUCCESS
;
3929 s
->flush_n_restarts
= false;
3932 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
3933 Service
*s
= SERVICE(u
);
3937 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
3940 static int service_main_pid(Unit
*u
) {
3941 Service
*s
= SERVICE(u
);
3948 static int service_control_pid(Unit
*u
) {
3949 Service
*s
= SERVICE(u
);
3953 return s
->control_pid
;
3956 static bool service_needs_console(Unit
*u
) {
3957 Service
*s
= SERVICE(u
);
3961 /* We provide our own implementation of this here, instead of relying of the generic implementation
3962 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
3964 if (!exec_context_may_touch_console(&s
->exec_context
))
3967 return IN_SET(s
->state
,
3974 SERVICE_STOP_WATCHDOG
,
3975 SERVICE_STOP_SIGTERM
,
3976 SERVICE_STOP_SIGKILL
,
3978 SERVICE_FINAL_SIGTERM
,
3979 SERVICE_FINAL_SIGKILL
);
3982 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
3983 [SERVICE_RESTART_NO
] = "no",
3984 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
3985 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
3986 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
3987 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
3988 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
3989 [SERVICE_RESTART_ALWAYS
] = "always",
3992 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
3994 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
3995 [SERVICE_SIMPLE
] = "simple",
3996 [SERVICE_FORKING
] = "forking",
3997 [SERVICE_ONESHOT
] = "oneshot",
3998 [SERVICE_DBUS
] = "dbus",
3999 [SERVICE_NOTIFY
] = "notify",
4000 [SERVICE_IDLE
] = "idle",
4001 [SERVICE_EXEC
] = "exec",
4004 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4006 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4007 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4008 [SERVICE_EXEC_START
] = "ExecStart",
4009 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4010 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4011 [SERVICE_EXEC_STOP
] = "ExecStop",
4012 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4015 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4017 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4018 [NOTIFY_UNKNOWN
] = "unknown",
4019 [NOTIFY_READY
] = "ready",
4020 [NOTIFY_RELOADING
] = "reloading",
4021 [NOTIFY_STOPPING
] = "stopping",
4024 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4026 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4027 [SERVICE_SUCCESS
] = "success",
4028 [SERVICE_FAILURE_RESOURCES
] = "resources",
4029 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4030 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4031 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4032 [SERVICE_FAILURE_SIGNAL
] = "signal",
4033 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4034 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4035 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4038 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4040 const UnitVTable service_vtable
= {
4041 .object_size
= sizeof(Service
),
4042 .exec_context_offset
= offsetof(Service
, exec_context
),
4043 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4044 .kill_context_offset
= offsetof(Service
, kill_context
),
4045 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4046 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4052 .private_section
= "Service",
4054 .can_transient
= true,
4055 .can_delegate
= true,
4057 .init
= service_init
,
4058 .done
= service_done
,
4059 .load
= service_load
,
4060 .release_resources
= service_release_resources
,
4062 .coldplug
= service_coldplug
,
4064 .dump
= service_dump
,
4066 .start
= service_start
,
4067 .stop
= service_stop
,
4068 .reload
= service_reload
,
4070 .can_reload
= service_can_reload
,
4072 .kill
= service_kill
,
4074 .serialize
= service_serialize
,
4075 .deserialize_item
= service_deserialize_item
,
4077 .active_state
= service_active_state
,
4078 .sub_state_to_string
= service_sub_state_to_string
,
4080 .will_restart
= service_will_restart
,
4082 .may_gc
= service_may_gc
,
4084 .sigchld_event
= service_sigchld_event
,
4086 .reset_failed
= service_reset_failed
,
4088 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4089 .notify_message
= service_notify_message
,
4091 .main_pid
= service_main_pid
,
4092 .control_pid
= service_control_pid
,
4094 .bus_name_owner_change
= service_bus_name_owner_change
,
4096 .bus_vtable
= bus_service_vtable
,
4097 .bus_set_property
= bus_service_set_property
,
4098 .bus_commit_properties
= bus_service_commit_properties
,
4100 .get_timeout
= service_get_timeout
,
4101 .needs_console
= service_needs_console
,
4103 .status_message_formats
= {
4104 .starting_stopping
= {
4105 [0] = "Starting %s...",
4106 [1] = "Stopping %s...",
4108 .finished_start_job
= {
4109 [JOB_DONE
] = "Started %s.",
4110 [JOB_FAILED
] = "Failed to start %s.",
4112 .finished_stop_job
= {
4113 [JOB_DONE
] = "Stopped %s.",
4114 [JOB_FAILED
] = "Stopped (with error) %s.",