1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
8 #include "sd-messages.h"
10 #include "alloc-util.h"
12 #include "bus-error.h"
13 #include "bus-kernel.h"
15 #include "dbus-service.h"
16 #include "dbus-unit.h"
20 #include "exit-status.h"
23 #include "format-util.h"
25 #include "load-dropin.h"
26 #include "load-fragment.h"
29 #include "parse-util.h"
30 #include "path-util.h"
31 #include "process-util.h"
32 #include "serialize.h"
34 #include "signal-util.h"
36 #include "stdio-util.h"
37 #include "string-table.h"
38 #include "string-util.h"
40 #include "unit-name.h"
45 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
46 [SERVICE_DEAD
] = UNIT_INACTIVE
,
47 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
48 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
49 [SERVICE_START
] = UNIT_ACTIVATING
,
50 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
51 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
52 [SERVICE_EXITED
] = UNIT_ACTIVE
,
53 [SERVICE_RELOAD
] = UNIT_RELOADING
,
54 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
55 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
56 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
59 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
60 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
61 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
62 [SERVICE_FAILED
] = UNIT_FAILED
,
63 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
64 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
67 /* For Type=idle we never want to delay any other jobs, hence we
68 * consider idle jobs active as soon as we start working on them */
69 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
70 [SERVICE_DEAD
] = UNIT_INACTIVE
,
71 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
72 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
73 [SERVICE_START
] = UNIT_ACTIVE
,
74 [SERVICE_START_POST
] = UNIT_ACTIVE
,
75 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
76 [SERVICE_EXITED
] = UNIT_ACTIVE
,
77 [SERVICE_RELOAD
] = UNIT_RELOADING
,
78 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
79 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
80 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
81 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
82 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
83 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
84 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
85 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
86 [SERVICE_FAILED
] = UNIT_FAILED
,
87 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
88 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
91 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
92 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
93 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
94 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
96 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
97 static void service_enter_reload_by_notify(Service
*s
);
99 static void service_init(Unit
*u
) {
100 Service
*s
= SERVICE(u
);
103 assert(u
->load_state
== UNIT_STUB
);
105 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
106 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
107 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
108 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
109 s
->restart_usec
= u
->manager
->default_restart_usec
;
110 s
->runtime_max_usec
= USEC_INFINITY
;
111 s
->type
= _SERVICE_TYPE_INVALID
;
113 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -1;
114 s
->guess_main_pid
= true;
116 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
118 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
119 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
121 s
->watchdog_original_usec
= USEC_INFINITY
;
123 s
->oom_policy
= _OOM_POLICY_INVALID
;
126 static void service_unwatch_control_pid(Service
*s
) {
129 if (s
->control_pid
<= 0)
132 unit_unwatch_pid(UNIT(s
), s
->control_pid
);
136 static void service_unwatch_main_pid(Service
*s
) {
139 if (s
->main_pid
<= 0)
142 unit_unwatch_pid(UNIT(s
), s
->main_pid
);
146 static void service_unwatch_pid_file(Service
*s
) {
147 if (!s
->pid_file_pathspec
)
150 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
151 path_spec_unwatch(s
->pid_file_pathspec
);
152 path_spec_done(s
->pid_file_pathspec
);
153 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
156 static int service_set_main_pid(Service
*s
, pid_t pid
) {
162 if (pid
== getpid_cached())
165 if (s
->main_pid
== pid
&& s
->main_pid_known
)
168 if (s
->main_pid
!= pid
) {
169 service_unwatch_main_pid(s
);
170 exec_status_start(&s
->main_exec_status
, pid
);
174 s
->main_pid_known
= true;
175 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
177 if (s
->main_pid_alien
)
178 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
183 void service_close_socket_fd(Service
*s
) {
186 /* Undo the effect of service_set_socket_fd(). */
188 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
190 if (UNIT_ISSET(s
->accept_socket
)) {
191 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
192 unit_ref_unset(&s
->accept_socket
);
196 static void service_stop_watchdog(Service
*s
) {
199 s
->watchdog_event_source
= sd_event_source_unref(s
->watchdog_event_source
);
200 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
203 static void service_start_watchdog(Service
*s
) {
204 usec_t watchdog_usec
;
209 watchdog_usec
= service_get_watchdog_usec(s
);
210 if (IN_SET(watchdog_usec
, 0, USEC_INFINITY
)) {
211 service_stop_watchdog(s
);
215 if (s
->watchdog_event_source
) {
216 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
218 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
222 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
224 r
= sd_event_add_time(
225 UNIT(s
)->manager
->event
,
226 &s
->watchdog_event_source
,
228 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
229 service_dispatch_watchdog
, s
);
231 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
235 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
237 /* Let's process everything else which might be a sign
238 * of living before we consider a service died. */
239 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
242 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
245 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
251 /* Extends the specified event source timer to at least the specified time, unless it is already later
257 r
= sd_event_source_get_time(source
, ¤t
);
260 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
261 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
265 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
268 r
= sd_event_source_set_time(source
, extended
);
271 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
272 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for even source '%s', ignoring %m", strna(desc
));
276 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
281 if (IN_SET(extend_timeout_usec
, 0, USEC_INFINITY
))
284 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
286 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
287 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
290 static void service_reset_watchdog(Service
*s
) {
293 dual_timestamp_get(&s
->watchdog_timestamp
);
294 service_start_watchdog(s
);
297 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
300 s
->watchdog_override_enable
= true;
301 s
->watchdog_override_usec
= watchdog_override_usec
;
302 service_reset_watchdog(s
);
304 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
305 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
308 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
314 assert(fs
->service
->n_fd_store
> 0);
315 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
316 fs
->service
->n_fd_store
--;
319 sd_event_source_disable_unref(fs
->event_source
);
326 static void service_release_fd_store(Service
*s
) {
329 if (s
->n_keep_fd_store
> 0)
332 log_unit_debug(UNIT(s
), "Releasing all stored fds");
334 service_fd_store_unlink(s
->fd_store
);
336 assert(s
->n_fd_store
== 0);
339 static void service_release_resources(Unit
*u
) {
340 Service
*s
= SERVICE(u
);
344 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
347 log_unit_debug(u
, "Releasing resources.");
349 s
->stdin_fd
= safe_close(s
->stdin_fd
);
350 s
->stdout_fd
= safe_close(s
->stdout_fd
);
351 s
->stderr_fd
= safe_close(s
->stderr_fd
);
353 service_release_fd_store(s
);
356 static void service_done(Unit
*u
) {
357 Service
*s
= SERVICE(u
);
361 s
->pid_file
= mfree(s
->pid_file
);
362 s
->status_text
= mfree(s
->status_text
);
364 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
365 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
366 s
->control_command
= NULL
;
367 s
->main_command
= NULL
;
369 dynamic_creds_unref(&s
->dynamic_creds
);
371 exit_status_set_free(&s
->restart_prevent_status
);
372 exit_status_set_free(&s
->restart_force_status
);
373 exit_status_set_free(&s
->success_status
);
375 /* This will leak a process, but at least no memory or any of
377 service_unwatch_main_pid(s
);
378 service_unwatch_control_pid(s
);
379 service_unwatch_pid_file(s
);
382 unit_unwatch_bus_name(u
, s
->bus_name
);
383 s
->bus_name
= mfree(s
->bus_name
);
386 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
388 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
389 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
391 service_close_socket_fd(s
);
392 s
->peer
= socket_peer_unref(s
->peer
);
394 unit_ref_unset(&s
->accept_socket
);
396 service_stop_watchdog(s
);
398 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
399 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
401 service_release_resources(u
);
404 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
405 ServiceFDStore
*fs
= userdata
;
410 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
411 log_unit_debug(UNIT(fs
->service
),
412 "Received %s on stored fd %d (%s), closing.",
413 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
414 fs
->fd
, strna(fs
->fdname
));
415 service_fd_store_unlink(fs
);
419 static int service_add_fd_store(Service
*s
, int fd
, const char *name
, bool do_poll
) {
423 /* fd is always consumed if we return >= 0 */
428 if (s
->n_fd_store
>= s
->n_fd_store_max
)
429 return -EXFULL
; /* Our store is full.
430 * Use this errno rather than E[NM]FILE to distinguish from
431 * the case where systemd itself hits the file limit. */
433 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
434 r
= same_fd(fs
->fd
, fd
);
439 return 0; /* fd already included */
443 fs
= new(ServiceFDStore
, 1);
447 *fs
= (ServiceFDStore
) {
451 .fdname
= strdup(name
?: "stored"),
460 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
461 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
466 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
469 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
472 return 1; /* fd newly stored */
475 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
480 while (fdset_size(fds
) > 0) {
481 _cleanup_close_
int fd
= -1;
483 fd
= fdset_steal_first(fds
);
487 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
489 return log_unit_warning_errno(UNIT(s
), r
,
490 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
493 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
495 log_unit_debug(UNIT(s
), "Added fd %u (%s) to fd store.", fd
, strna(name
));
502 static void service_remove_fd_store(Service
*s
, const char *name
) {
503 ServiceFDStore
*fs
, *n
;
508 LIST_FOREACH_SAFE(fd_store
, fs
, n
, s
->fd_store
) {
509 if (!streq(fs
->fdname
, name
))
512 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
513 service_fd_store_unlink(fs
);
517 static int service_arm_timer(Service
*s
, usec_t usec
) {
522 if (s
->timer_event_source
) {
523 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
527 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
530 if (usec
== USEC_INFINITY
)
533 r
= sd_event_add_time(
534 UNIT(s
)->manager
->event
,
535 &s
->timer_event_source
,
538 service_dispatch_timer
, s
);
542 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
547 static int service_verify(Service
*s
) {
549 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
551 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
] &&
552 UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
553 /* FailureAction= only makes sense if one of the start or stop commands is specified.
554 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
555 * either a command or SuccessAction= are required. */
557 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
559 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
])
560 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
562 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
563 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= and no SuccessAction= settings and does not have RemainAfterExit=yes set. Refusing.");
565 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
)
566 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has more than one ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
568 if (s
->type
== SERVICE_ONESHOT
&&
569 !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
))
570 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has Restart= set to either always or on-success, which isn't allowed for Type=oneshot services. Refusing.");
572 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
))
573 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has RestartForceStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
575 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
)
576 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service is of type D-Bus but no D-Bus service name has been specified. Refusing.");
578 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
))
579 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.");
581 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
582 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
584 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
585 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
587 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
588 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
593 static int service_add_default_dependencies(Service
*s
) {
598 if (!UNIT(s
)->default_dependencies
)
601 /* Add a number of automatic dependencies useful for the
602 * majority of services. */
604 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
605 /* First, pull in the really early boot stuff, and
606 * require it, so that we fail if we can't acquire
609 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
614 /* In the --user instance there's no sysinit.target,
615 * in that case require basic.target instead. */
617 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
622 /* Second, if the rest of the base system is in the same
623 * transaction, order us after it, but do not pull it in or
624 * even require it. */
625 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
629 /* Third, add us in for normal shutdown. */
630 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
633 static void service_fix_stdio(Service
*s
) {
636 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
637 * default value that is subject to automatic overriding triggered by other settings and an explicit
638 * choice the user can make. We don't distinguish between these cases currently. */
640 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
641 s
->exec_context
.stdin_data_size
> 0)
642 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
644 if (IN_SET(s
->exec_context
.std_input
,
646 EXEC_INPUT_TTY_FORCE
,
649 EXEC_INPUT_NAMED_FD
))
652 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
653 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
654 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
655 * duplicated for both input and output at the same time (since they then would cause a feedback
656 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
658 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
659 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
660 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
662 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
663 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
666 static int service_setup_bus_name(Service
*s
) {
671 if (s
->type
!= SERVICE_DBUS
)
674 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
676 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
678 /* We always want to be ordered against dbus.socket if both are in the transaction. */
679 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
681 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
683 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
685 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
687 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
692 static int service_add_extras(Service
*s
) {
697 if (s
->type
== _SERVICE_TYPE_INVALID
) {
698 /* Figure out a type automatically */
700 s
->type
= SERVICE_DBUS
;
701 else if (s
->exec_command
[SERVICE_EXEC_START
])
702 s
->type
= SERVICE_SIMPLE
;
704 s
->type
= SERVICE_ONESHOT
;
707 /* Oneshot services have disabled start timeout by default */
708 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
709 s
->timeout_start_usec
= USEC_INFINITY
;
711 service_fix_stdio(s
);
713 r
= unit_patch_contexts(UNIT(s
));
717 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
721 r
= unit_set_default_slice(UNIT(s
));
725 /* If the service needs the notify socket, let's enable it automatically. */
726 if (s
->notify_access
== NOTIFY_NONE
&&
727 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
728 s
->notify_access
= NOTIFY_MAIN
;
730 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
731 * delegation is on, in that case it we assume the payload knows better what to do and can process
732 * things in a more focused way. */
733 if (s
->oom_policy
< 0)
734 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
736 /* Let the kernel do the killing if that's requested. */
737 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
739 r
= service_add_default_dependencies(s
);
743 r
= service_setup_bus_name(s
);
750 static int service_load(Unit
*u
) {
751 Service
*s
= SERVICE(u
);
754 r
= unit_load_fragment_and_dropin(u
, true);
758 if (u
->load_state
!= UNIT_LOADED
)
761 /* This is a new unit? Then let's add in some extras */
762 r
= service_add_extras(s
);
766 return service_verify(s
);
769 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
770 char buf_restart
[FORMAT_TIMESPAN_MAX
], buf_start
[FORMAT_TIMESPAN_MAX
], buf_stop
[FORMAT_TIMESPAN_MAX
],
771 buf_runtime
[FORMAT_TIMESPAN_MAX
], buf_watchdog
[FORMAT_TIMESPAN_MAX
], buf_abort
[FORMAT_TIMESPAN_MAX
];
772 ServiceExecCommand c
;
773 Service
*s
= SERVICE(u
);
778 prefix
= strempty(prefix
);
779 prefix2
= strjoina(prefix
, "\t");
782 "%sService State: %s\n"
784 "%sReload Result: %s\n"
785 "%sClean Result: %s\n"
786 "%sPermissionsStartOnly: %s\n"
787 "%sRootDirectoryStartOnly: %s\n"
788 "%sRemainAfterExit: %s\n"
789 "%sGuessMainPID: %s\n"
792 "%sNotifyAccess: %s\n"
793 "%sNotifyState: %s\n"
795 prefix
, service_state_to_string(s
->state
),
796 prefix
, service_result_to_string(s
->result
),
797 prefix
, service_result_to_string(s
->reload_result
),
798 prefix
, service_result_to_string(s
->clean_result
),
799 prefix
, yes_no(s
->permissions_start_only
),
800 prefix
, yes_no(s
->root_directory_start_only
),
801 prefix
, yes_no(s
->remain_after_exit
),
802 prefix
, yes_no(s
->guess_main_pid
),
803 prefix
, service_type_to_string(s
->type
),
804 prefix
, service_restart_to_string(s
->restart
),
805 prefix
, notify_access_to_string(s
->notify_access
),
806 prefix
, notify_state_to_string(s
->notify_state
),
807 prefix
, oom_policy_to_string(s
->oom_policy
));
809 if (s
->control_pid
> 0)
811 "%sControl PID: "PID_FMT
"\n",
812 prefix
, s
->control_pid
);
816 "%sMain PID: "PID_FMT
"\n"
817 "%sMain PID Known: %s\n"
818 "%sMain PID Alien: %s\n",
820 prefix
, yes_no(s
->main_pid_known
),
821 prefix
, yes_no(s
->main_pid_alien
));
826 prefix
, s
->pid_file
);
831 "%sBus Name Good: %s\n",
833 prefix
, yes_no(s
->bus_name_good
));
835 if (UNIT_ISSET(s
->accept_socket
))
837 "%sAccept Socket: %s\n",
838 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
842 "%sTimeoutStartSec: %s\n"
843 "%sTimeoutStopSec: %s\n"
844 "%sTimeoutStartFailureMode: %s\n"
845 "%sTimeoutStopFailureMode: %s\n",
846 prefix
, format_timespan(buf_restart
, sizeof(buf_restart
), s
->restart_usec
, USEC_PER_SEC
),
847 prefix
, format_timespan(buf_start
, sizeof(buf_start
), s
->timeout_start_usec
, USEC_PER_SEC
),
848 prefix
, format_timespan(buf_stop
, sizeof(buf_stop
), s
->timeout_stop_usec
, USEC_PER_SEC
),
849 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
850 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
852 if (s
->timeout_abort_set
)
854 "%sTimeoutAbortSec: %s\n",
855 prefix
, format_timespan(buf_abort
, sizeof(buf_abort
), s
->timeout_abort_usec
, USEC_PER_SEC
));
858 "%sRuntimeMaxSec: %s\n"
859 "%sWatchdogSec: %s\n",
860 prefix
, format_timespan(buf_runtime
, sizeof(buf_runtime
), s
->runtime_max_usec
, USEC_PER_SEC
),
861 prefix
, format_timespan(buf_watchdog
, sizeof(buf_watchdog
), s
->watchdog_usec
, USEC_PER_SEC
));
863 kill_context_dump(&s
->kill_context
, f
, prefix
);
864 exec_context_dump(&s
->exec_context
, f
, prefix
);
866 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
868 if (!s
->exec_command
[c
])
871 fprintf(f
, "%s-> %s:\n",
872 prefix
, service_exec_command_to_string(c
));
874 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
878 fprintf(f
, "%sStatus Text: %s\n",
879 prefix
, s
->status_text
);
881 if (s
->n_fd_store_max
> 0)
883 "%sFile Descriptor Store Max: %u\n"
884 "%sFile Descriptor Store Current: %zu\n",
885 prefix
, s
->n_fd_store_max
,
886 prefix
, s
->n_fd_store
);
888 cgroup_context_dump(UNIT(s
), f
, prefix
);
891 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
895 assert(pid_is_valid(pid
));
897 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
898 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
901 if (pid
== getpid_cached() || pid
== 1)
902 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
904 if (pid
== s
->control_pid
)
905 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
907 if (!pid_is_alive(pid
))
908 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
910 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
911 if (owner
== UNIT(s
)) {
912 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
913 return 1; /* Yay, it's definitely a good PID */
916 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
919 static int service_load_pid_file(Service
*s
, bool may_warn
) {
920 char procfs
[STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int)];
921 bool questionable_pid_file
= false;
922 _cleanup_free_
char *k
= NULL
;
923 _cleanup_close_
int fd
= -1;
932 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
934 r
= chase_symlinks(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
936 log_unit_debug_errno(UNIT(s
), r
,
937 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
939 questionable_pid_file
= true;
941 r
= chase_symlinks(s
->pid_file
, NULL
, 0, NULL
, &fd
);
944 return log_unit_full_errno(UNIT(s
), prio
, fd
,
945 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
947 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
948 * chase_symlinks() returned us into a proper fd first. */
949 xsprintf(procfs
, "/proc/self/fd/%i", fd
);
950 r
= read_one_line_file(procfs
, &k
);
952 return log_unit_error_errno(UNIT(s
), r
,
953 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
956 r
= parse_pid(k
, &pid
);
958 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
960 if (s
->main_pid_known
&& pid
== s
->main_pid
)
963 r
= service_is_suitable_main_pid(s
, pid
, prio
);
969 if (questionable_pid_file
)
970 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
971 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
973 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
975 if (fstat(fd
, &st
) < 0)
976 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
979 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
980 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
982 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
);
985 if (s
->main_pid_known
) {
986 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
988 service_unwatch_main_pid(s
);
989 s
->main_pid_known
= false;
991 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
993 r
= service_set_main_pid(s
, pid
);
997 r
= unit_watch_pid(UNIT(s
), pid
, false);
998 if (r
< 0) /* FIXME: we need to do something here */
999 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1004 static void service_search_main_pid(Service
*s
) {
1010 /* If we know it anyway, don't ever fall back to unreliable
1012 if (s
->main_pid_known
)
1015 if (!s
->guess_main_pid
)
1018 assert(s
->main_pid
<= 0);
1020 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1023 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1024 if (service_set_main_pid(s
, pid
) < 0)
1027 r
= unit_watch_pid(UNIT(s
), pid
, false);
1029 /* FIXME: we need to do something here */
1030 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1033 static void service_set_state(Service
*s
, ServiceState state
) {
1034 ServiceState old_state
;
1035 const UnitActiveState
*table
;
1039 if (s
->state
!= state
)
1040 bus_unit_send_pending_change_signal(UNIT(s
), false);
1042 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1044 old_state
= s
->state
;
1047 service_unwatch_pid_file(s
);
1050 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1053 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1054 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1055 SERVICE_AUTO_RESTART
,
1057 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
1060 SERVICE_START
, SERVICE_START_POST
,
1061 SERVICE_RUNNING
, SERVICE_RELOAD
,
1062 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1063 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1064 service_unwatch_main_pid(s
);
1065 s
->main_command
= NULL
;
1069 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1071 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1072 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1073 SERVICE_CLEANING
)) {
1074 service_unwatch_control_pid(s
);
1075 s
->control_command
= NULL
;
1076 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1079 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1080 unit_unwatch_all_pids(UNIT(s
));
1081 unit_dequeue_rewatch_pids(UNIT(s
));
1085 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1086 SERVICE_RUNNING
, SERVICE_RELOAD
,
1087 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1088 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1089 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1090 service_close_socket_fd(s
);
1092 if (state
!= SERVICE_START
)
1093 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
1095 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1096 service_stop_watchdog(s
);
1098 /* For the inactive states unit_notify() will trim the cgroup,
1099 * but for exit we have to do that ourselves... */
1100 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1101 unit_prune_cgroup(UNIT(s
));
1103 if (old_state
!= state
)
1104 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1106 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1107 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1108 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1111 static usec_t
service_coldplug_timeout(Service
*s
) {
1114 switch (s
->deserialized_state
) {
1116 case SERVICE_CONDITION
:
1117 case SERVICE_START_PRE
:
1119 case SERVICE_START_POST
:
1120 case SERVICE_RELOAD
:
1121 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1123 case SERVICE_RUNNING
:
1124 return usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
);
1127 case SERVICE_STOP_SIGTERM
:
1128 case SERVICE_STOP_SIGKILL
:
1129 case SERVICE_STOP_POST
:
1130 case SERVICE_FINAL_SIGTERM
:
1131 case SERVICE_FINAL_SIGKILL
:
1132 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1134 case SERVICE_STOP_WATCHDOG
:
1135 case SERVICE_FINAL_WATCHDOG
:
1136 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1138 case SERVICE_AUTO_RESTART
:
1139 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1141 case SERVICE_CLEANING
:
1142 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1145 return USEC_INFINITY
;
1149 static int service_coldplug(Unit
*u
) {
1150 Service
*s
= SERVICE(u
);
1154 assert(s
->state
== SERVICE_DEAD
);
1156 if (s
->deserialized_state
== s
->state
)
1159 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1163 if (s
->main_pid
> 0 &&
1164 pid_is_unwaited(s
->main_pid
) &&
1165 (IN_SET(s
->deserialized_state
,
1166 SERVICE_START
, SERVICE_START_POST
,
1167 SERVICE_RUNNING
, SERVICE_RELOAD
,
1168 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1169 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1170 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1175 if (s
->control_pid
> 0 &&
1176 pid_is_unwaited(s
->control_pid
) &&
1177 IN_SET(s
->deserialized_state
,
1178 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1180 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1181 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1182 SERVICE_CLEANING
)) {
1183 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1188 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1189 (void) unit_enqueue_rewatch_pids(u
);
1190 (void) unit_setup_dynamic_creds(u
);
1191 (void) unit_setup_exec_runtime(u
);
1194 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1195 service_start_watchdog(s
);
1197 if (UNIT_ISSET(s
->accept_socket
)) {
1198 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1200 if (socket
->max_connections_per_source
> 0) {
1203 /* Make a best-effort attempt at bumping the connection count */
1204 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1205 socket_peer_unref(s
->peer
);
1211 service_set_state(s
, s
->deserialized_state
);
1215 static int service_collect_fds(
1219 size_t *n_socket_fds
,
1220 size_t *n_storage_fds
) {
1222 _cleanup_strv_free_
char **rfd_names
= NULL
;
1223 _cleanup_free_
int *rfds
= NULL
;
1224 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1230 assert(n_socket_fds
);
1231 assert(n_storage_fds
);
1233 if (s
->socket_fd
>= 0) {
1235 /* Pass the per-connection socket */
1240 rfds
[0] = s
->socket_fd
;
1242 rfd_names
= strv_new("connection");
1251 /* Pass all our configured sockets for singleton services */
1253 HASHMAP_FOREACH_KEY(v
, u
, UNIT(s
)->dependencies
[UNIT_TRIGGERED_BY
]) {
1254 _cleanup_free_
int *cfds
= NULL
;
1258 if (u
->type
!= UNIT_SOCKET
)
1263 cn_fds
= socket_collect_fds(sock
, &cfds
);
1271 rfds
= TAKE_PTR(cfds
);
1272 rn_socket_fds
= cn_fds
;
1276 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1280 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1283 rn_socket_fds
+= cn_fds
;
1286 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1292 if (s
->n_fd_store
> 0) {
1298 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1304 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1309 n_fds
= rn_socket_fds
;
1311 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1312 rfds
[n_fds
] = fs
->fd
;
1313 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1314 if (!rfd_names
[n_fds
])
1321 rfd_names
[n_fds
] = NULL
;
1324 *fds
= TAKE_PTR(rfds
);
1325 *fd_names
= TAKE_PTR(rfd_names
);
1326 *n_socket_fds
= rn_socket_fds
;
1327 *n_storage_fds
= rn_storage_fds
;
1332 static int service_allocate_exec_fd_event_source(
1335 sd_event_source
**ret_event_source
) {
1337 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1342 assert(ret_event_source
);
1344 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1346 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1348 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1350 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1352 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1354 (void) sd_event_source_set_description(source
, "service event_fd");
1356 r
= sd_event_source_set_io_fd_own(source
, true);
1358 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1360 *ret_event_source
= TAKE_PTR(source
);
1364 static int service_allocate_exec_fd(
1366 sd_event_source
**ret_event_source
,
1369 _cleanup_close_pair_
int p
[2] = { -1, -1 };
1373 assert(ret_event_source
);
1374 assert(ret_exec_fd
);
1376 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1377 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1379 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1384 *ret_exec_fd
= TAKE_FD(p
[1]);
1389 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1392 /* Notifications are accepted depending on the process and
1393 * the access setting of the service:
1394 * process: \ access: NONE MAIN EXEC ALL
1395 * main no yes yes yes
1396 * control no no yes yes
1397 * other (forked) no no no yes */
1399 if (flags
& EXEC_IS_CONTROL
)
1400 /* A control process */
1401 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1403 /* We only spawn main processes and control processes, so any
1404 * process that is not a control process is a main process */
1405 return s
->notify_access
!= NOTIFY_NONE
;
1408 static int service_spawn(
1415 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1422 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1423 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1432 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1436 if (flags
& EXEC_IS_CONTROL
) {
1437 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1438 if (s
->permissions_start_only
)
1439 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1440 if (s
->root_directory_start_only
)
1441 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1444 if ((flags
& EXEC_PASS_FDS
) ||
1445 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1446 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1447 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1449 r
= service_collect_fds(s
,
1451 &exec_params
.fd_names
,
1452 &exec_params
.n_socket_fds
,
1453 &exec_params
.n_storage_fds
);
1457 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1460 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1461 assert(!s
->exec_fd_event_source
);
1463 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1468 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1472 our_env
= new0(char*, 10);
1476 if (service_exec_needs_notify_socket(s
, flags
)) {
1477 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1480 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1483 if (s
->main_pid
> 0)
1484 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1487 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1488 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1492 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1495 if (s
->socket_fd
>= 0) {
1496 union sockaddr_union sa
;
1497 socklen_t salen
= sizeof(sa
);
1499 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1500 * useful. Note that we do this only when we are still connected at this point in time, which we might
1501 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1502 * in ENOTCONN), and just use whate we can use. */
1504 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1505 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1506 _cleanup_free_
char *addr
= NULL
;
1510 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1514 t
= strjoin("REMOTE_ADDR=", addr
);
1517 our_env
[n_env
++] = t
;
1519 r
= sockaddr_port(&sa
.sa
, &port
);
1523 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1525 our_env
[n_env
++] = t
;
1529 if (flags
& EXEC_SETENV_RESULT
) {
1530 if (asprintf(our_env
+ n_env
++, "SERVICE_RESULT=%s", service_result_to_string(s
->result
)) < 0)
1533 if (s
->main_exec_status
.pid
> 0 &&
1534 dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
1535 if (asprintf(our_env
+ n_env
++, "EXIT_CODE=%s", sigchld_code_to_string(s
->main_exec_status
.code
)) < 0)
1538 if (s
->main_exec_status
.code
== CLD_EXITED
)
1539 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%i", s
->main_exec_status
.status
);
1541 r
= asprintf(our_env
+ n_env
++, "EXIT_STATUS=%s", signal_to_string(s
->main_exec_status
.status
));
1547 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1551 final_env
= strv_env_merge(2, exec_params
.environment
, our_env
, NULL
);
1555 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1556 SET_FLAG(exec_params
.flags
, EXEC_NSS_BYPASS_BUS
,
1557 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1559 strv_free_and_replace(exec_params
.environment
, final_env
);
1560 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1561 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1562 if (s
->type
== SERVICE_IDLE
)
1563 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1564 exec_params
.stdin_fd
= s
->stdin_fd
;
1565 exec_params
.stdout_fd
= s
->stdout_fd
;
1566 exec_params
.stderr_fd
= s
->stderr_fd
;
1568 r
= exec_spawn(UNIT(s
),
1578 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1579 s
->exec_fd_hot
= false;
1581 r
= unit_watch_pid(UNIT(s
), pid
, true);
1590 static int main_pid_good(Service
*s
) {
1593 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1595 /* If we know the pid file, then let's just check if it is
1597 if (s
->main_pid_known
) {
1599 /* If it's an alien child let's check if it is still
1601 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1602 return pid_is_alive(s
->main_pid
);
1604 /* .. otherwise assume we'll get a SIGCHLD for it,
1605 * which we really should wait for to collect exit
1606 * status and code */
1607 return s
->main_pid
> 0;
1610 /* We don't know the pid */
1614 static int control_pid_good(Service
*s
) {
1617 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1618 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1619 * means: we can't figure it out. */
1621 return s
->control_pid
> 0;
1624 static int cgroup_empty(Service
*s
) {
1627 /* Returns 0 if there is no cgroup, > 0 if is empty or doesn't exist, < 0 if we can't figure it out */
1629 if (!UNIT(s
)->cgroup_path
)
1632 return cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1636 static int cgroup_good(Service
*s
) {
1639 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1642 r
= cgroup_empty(s
);
1649 static bool service_shall_restart(Service
*s
, const char **reason
) {
1652 /* Don't restart after manual stops */
1653 if (s
->forbid_restart
) {
1654 *reason
= "manual stop";
1658 /* Never restart if this is configured as special exception */
1659 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1660 *reason
= "prevented by exit status";
1664 /* Restart if the exit code/status are configured as restart triggers */
1665 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1666 *reason
= "forced by exit status";
1670 *reason
= "restart setting";
1671 switch (s
->restart
) {
1673 case SERVICE_RESTART_NO
:
1676 case SERVICE_RESTART_ALWAYS
:
1679 case SERVICE_RESTART_ON_SUCCESS
:
1680 return s
->result
== SERVICE_SUCCESS
;
1682 case SERVICE_RESTART_ON_FAILURE
:
1683 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1685 case SERVICE_RESTART_ON_ABNORMAL
:
1686 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1688 case SERVICE_RESTART_ON_WATCHDOG
:
1689 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1691 case SERVICE_RESTART_ON_ABORT
:
1692 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1695 assert_not_reached("unknown restart setting");
1699 static bool service_will_restart(Unit
*u
) {
1700 Service
*s
= SERVICE(u
);
1704 if (s
->will_auto_restart
)
1706 if (s
->state
== SERVICE_AUTO_RESTART
)
1709 return unit_will_restart_default(u
);
1712 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1713 ServiceState end_state
;
1718 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1719 * undo what has already been enqueued. */
1720 if (unit_stop_pending(UNIT(s
)))
1721 allow_restart
= false;
1723 if (s
->result
== SERVICE_SUCCESS
)
1726 if (s
->result
== SERVICE_SUCCESS
) {
1727 unit_log_success(UNIT(s
));
1728 end_state
= SERVICE_DEAD
;
1729 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1730 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1731 end_state
= SERVICE_DEAD
;
1733 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1734 end_state
= SERVICE_FAILED
;
1736 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1739 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1744 shall_restart
= service_shall_restart(s
, &reason
);
1745 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1746 shall_restart
? "" : "not ",
1749 s
->will_auto_restart
= true;
1752 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1753 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1754 s
->n_keep_fd_store
++;
1756 service_set_state(s
, end_state
);
1758 if (s
->will_auto_restart
) {
1759 s
->will_auto_restart
= false;
1761 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1763 s
->n_keep_fd_store
--;
1767 service_set_state(s
, SERVICE_AUTO_RESTART
);
1769 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1770 * user can still introspect the counter. Do so on the next start. */
1771 s
->flush_n_restarts
= true;
1773 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1774 * queue, so that the fd store is possibly gc'ed again */
1775 s
->n_keep_fd_store
--;
1776 unit_add_to_gc_queue(UNIT(s
));
1778 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1779 s
->forbid_restart
= false;
1781 /* We want fresh tmpdirs in case service is started again immediately */
1782 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1784 /* Also, remove the runtime directory */
1785 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
1787 /* Get rid of the IPC bits of the user */
1788 unit_unref_uid_gid(UNIT(s
), true);
1790 /* Release the user, and destroy it if we are the only remaining owner */
1791 dynamic_creds_destroy(&s
->dynamic_creds
);
1793 /* Try to delete the pid file. At this point it will be
1794 * out-of-date, and some software might be confused by it, so
1795 * let's remove it. */
1797 (void) unlink(s
->pid_file
);
1799 /* Reset TTY ownership if necessary */
1800 exec_context_revert_tty(&s
->exec_context
);
1805 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1806 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1809 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1813 if (s
->result
== SERVICE_SUCCESS
)
1816 service_unwatch_control_pid(s
);
1817 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1819 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1820 if (s
->control_command
) {
1821 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1823 r
= service_spawn(s
,
1825 s
->timeout_stop_usec
,
1826 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1831 service_set_state(s
, SERVICE_STOP_POST
);
1833 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1838 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1839 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1842 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1845 case SERVICE_STOP_WATCHDOG
:
1846 case SERVICE_FINAL_WATCHDOG
:
1847 return KILL_WATCHDOG
;
1849 case SERVICE_STOP_SIGTERM
:
1850 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1851 return KILL_RESTART
;
1854 case SERVICE_FINAL_SIGTERM
:
1855 return KILL_TERMINATE
;
1857 case SERVICE_STOP_SIGKILL
:
1858 case SERVICE_FINAL_SIGKILL
:
1862 return _KILL_OPERATION_INVALID
;
1866 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1867 int kill_operation
, r
;
1871 if (s
->result
== SERVICE_SUCCESS
)
1874 /* Before sending any signal, make sure we track all members of this cgroup */
1875 (void) unit_watch_all_pids(UNIT(s
));
1877 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1879 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1881 kill_operation
= state_to_kill_operation(s
, state
);
1882 r
= unit_kill_context(
1893 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1894 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1898 service_set_state(s
, state
);
1899 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1900 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1901 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1902 service_enter_stop_post(s
, SERVICE_SUCCESS
);
1903 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
1904 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
1906 service_enter_dead(s
, SERVICE_SUCCESS
, true);
1911 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
1913 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
1914 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
1916 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
1919 static void service_enter_stop_by_notify(Service
*s
) {
1922 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1924 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
1926 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
1927 service_set_state(s
, SERVICE_STOP_SIGTERM
);
1930 static void service_enter_stop(Service
*s
, ServiceResult f
) {
1935 if (s
->result
== SERVICE_SUCCESS
)
1938 service_unwatch_control_pid(s
);
1939 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1941 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
1942 if (s
->control_command
) {
1943 s
->control_command_id
= SERVICE_EXEC_STOP
;
1945 r
= service_spawn(s
,
1947 s
->timeout_stop_usec
,
1948 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1953 service_set_state(s
, SERVICE_STOP
);
1955 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
1960 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
1961 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1964 static bool service_good(Service
*s
) {
1968 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
1971 main_pid_ok
= main_pid_good(s
);
1972 if (main_pid_ok
> 0) /* It's alive */
1974 if (main_pid_ok
== 0) /* It's dead */
1977 /* OK, we don't know anything about the main PID, maybe
1978 * because there is none. Let's check the control group
1981 return cgroup_good(s
) != 0;
1984 static void service_enter_running(Service
*s
, ServiceResult f
) {
1987 if (s
->result
== SERVICE_SUCCESS
)
1990 service_unwatch_control_pid(s
);
1992 if (s
->result
!= SERVICE_SUCCESS
)
1993 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
1994 else if (service_good(s
)) {
1996 /* If there are any queued up sd_notify() notifications, process them now */
1997 if (s
->notify_state
== NOTIFY_RELOADING
)
1998 service_enter_reload_by_notify(s
);
1999 else if (s
->notify_state
== NOTIFY_STOPPING
)
2000 service_enter_stop_by_notify(s
);
2002 service_set_state(s
, SERVICE_RUNNING
);
2003 service_arm_timer(s
, usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
, s
->runtime_max_usec
));
2006 } else if (s
->remain_after_exit
)
2007 service_set_state(s
, SERVICE_EXITED
);
2009 service_enter_stop(s
, SERVICE_SUCCESS
);
2012 static void service_enter_start_post(Service
*s
) {
2016 service_unwatch_control_pid(s
);
2017 service_reset_watchdog(s
);
2019 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2020 if (s
->control_command
) {
2021 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2023 r
= service_spawn(s
,
2025 s
->timeout_start_usec
,
2026 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2031 service_set_state(s
, SERVICE_START_POST
);
2033 service_enter_running(s
, SERVICE_SUCCESS
);
2038 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2039 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2042 static void service_kill_control_process(Service
*s
) {
2047 if (s
->control_pid
<= 0)
2050 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2052 _cleanup_free_
char *comm
= NULL
;
2054 (void) get_process_comm(s
->control_pid
, &comm
);
2056 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2057 s
->control_pid
, strna(comm
));
2061 static int service_adverse_to_leftover_processes(Service
*s
) {
2064 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2065 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2066 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2067 * time is quite variable (so Timeout settings aren't of use).
2069 * Here we take these two factors and refuse to start a service if there are existing processes
2070 * within a control group. Databases, while generally having some protection against multiple
2071 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2072 * aren't as rigoriously written to protect aganst against multiple use. */
2074 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2075 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2076 !s
->kill_context
.send_sigkill
)
2077 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2078 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2083 static void service_enter_start(Service
*s
) {
2091 service_unwatch_control_pid(s
);
2092 service_unwatch_main_pid(s
);
2094 r
= service_adverse_to_leftover_processes(s
);
2098 if (s
->type
== SERVICE_FORKING
) {
2099 s
->control_command_id
= SERVICE_EXEC_START
;
2100 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2102 s
->main_command
= NULL
;
2104 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2105 s
->control_command
= NULL
;
2107 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2111 if (s
->type
!= SERVICE_ONESHOT
) {
2112 /* There's no command line configured for the main command? Hmm, that is strange.
2113 * This can only happen if the configuration changes at runtime. In this case,
2114 * let's enter a failure state. */
2115 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2119 /* We force a fake state transition here. Otherwise, the unit would go directly from
2120 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2121 * in between. This way we can later trigger actions that depend on the state
2122 * transition, including SuccessAction=. */
2123 service_set_state(s
, SERVICE_START
);
2125 service_enter_start_post(s
);
2129 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2130 /* For simple + idle this is the main process. We don't apply any timeout here, but
2131 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2132 timeout
= USEC_INFINITY
;
2134 timeout
= s
->timeout_start_usec
;
2136 r
= service_spawn(s
,
2139 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
,
2144 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2145 /* For simple services we immediately start
2146 * the START_POST binaries. */
2148 service_set_main_pid(s
, pid
);
2149 service_enter_start_post(s
);
2151 } else if (s
->type
== SERVICE_FORKING
) {
2153 /* For forking services we wait until the start
2154 * process exited. */
2156 s
->control_pid
= pid
;
2157 service_set_state(s
, SERVICE_START
);
2159 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2161 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2163 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2164 * bus. 'notify' and 'exec' services are similar. */
2166 service_set_main_pid(s
, pid
);
2167 service_set_state(s
, SERVICE_START
);
2169 assert_not_reached("Unknown service type");
2174 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2175 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2178 static void service_enter_start_pre(Service
*s
) {
2183 service_unwatch_control_pid(s
);
2185 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2186 if (s
->control_command
) {
2188 r
= service_adverse_to_leftover_processes(s
);
2192 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2194 r
= service_spawn(s
,
2196 s
->timeout_start_usec
,
2197 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2202 service_set_state(s
, SERVICE_START_PRE
);
2204 service_enter_start(s
);
2209 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2210 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2213 static void service_enter_condition(Service
*s
) {
2218 service_unwatch_control_pid(s
);
2220 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2221 if (s
->control_command
) {
2223 r
= service_adverse_to_leftover_processes(s
);
2227 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2229 r
= service_spawn(s
,
2231 s
->timeout_start_usec
,
2232 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2238 service_set_state(s
, SERVICE_CONDITION
);
2240 service_enter_start_pre(s
);
2245 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2246 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2249 static void service_enter_restart(Service
*s
) {
2250 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2255 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2256 /* Don't restart things if we are going down anyway */
2257 log_unit_info(UNIT(s
), "Stop job pending for unit, delaying automatic restart.");
2259 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
2266 /* Any units that are bound to this service must also be
2267 * restarted. We use JOB_RESTART (instead of the more obvious
2268 * JOB_START) here so that those dependency jobs will be added
2270 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2274 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2275 * stopped, i.e. as long as it remains up or remains in auto-start states. The use can reset the counter
2276 * explicitly however via the usual "systemctl reset-failure" logic. */
2278 s
->flush_n_restarts
= false;
2280 log_struct(LOG_INFO
,
2281 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2282 LOG_UNIT_ID(UNIT(s
)),
2283 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2284 LOG_UNIT_MESSAGE(UNIT(s
), "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2285 "N_RESTARTS=%u", s
->n_restarts
);
2287 /* Notify clients about changed restart counter */
2288 unit_add_to_dbus_queue(UNIT(s
));
2290 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2291 * it will be canceled as part of the service_stop() call that
2292 * is executed as part of JOB_RESTART. */
2297 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2298 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2301 static void service_enter_reload_by_notify(Service
*s
) {
2302 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2307 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2308 service_set_state(s
, SERVICE_RELOAD
);
2310 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2311 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2313 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2316 static void service_enter_reload(Service
*s
) {
2321 service_unwatch_control_pid(s
);
2322 s
->reload_result
= SERVICE_SUCCESS
;
2324 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2325 if (s
->control_command
) {
2326 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2328 r
= service_spawn(s
,
2330 s
->timeout_start_usec
,
2331 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2336 service_set_state(s
, SERVICE_RELOAD
);
2338 service_enter_running(s
, SERVICE_SUCCESS
);
2343 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2344 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2345 service_enter_running(s
, SERVICE_SUCCESS
);
2348 static void service_run_next_control(Service
*s
) {
2353 assert(s
->control_command
);
2354 assert(s
->control_command
->command_next
);
2356 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2358 s
->control_command
= s
->control_command
->command_next
;
2359 service_unwatch_control_pid(s
);
2361 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2362 timeout
= s
->timeout_start_usec
;
2364 timeout
= s
->timeout_stop_usec
;
2366 r
= service_spawn(s
,
2369 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2370 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2371 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2372 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2380 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2382 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2383 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2384 else if (s
->state
== SERVICE_STOP_POST
)
2385 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2386 else if (s
->state
== SERVICE_RELOAD
) {
2387 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2388 service_enter_running(s
, SERVICE_SUCCESS
);
2390 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2393 static void service_run_next_main(Service
*s
) {
2398 assert(s
->main_command
);
2399 assert(s
->main_command
->command_next
);
2400 assert(s
->type
== SERVICE_ONESHOT
);
2402 s
->main_command
= s
->main_command
->command_next
;
2403 service_unwatch_main_pid(s
);
2405 r
= service_spawn(s
,
2407 s
->timeout_start_usec
,
2408 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
,
2413 service_set_main_pid(s
, pid
);
2418 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2419 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2422 static int service_start(Unit
*u
) {
2423 Service
*s
= SERVICE(u
);
2428 /* We cannot fulfill this request right now, try again later
2430 if (IN_SET(s
->state
,
2431 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2432 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2435 /* Already on it! */
2436 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2439 /* A service that will be restarted must be stopped first to
2440 * trigger BindsTo and/or OnFailure dependencies. If a user
2441 * does not want to wait for the holdoff time to elapse, the
2442 * service should be manually restarted, not started. We
2443 * simply return EAGAIN here, so that any start jobs stay
2444 * queued, and assume that the auto restart timer will
2445 * eventually trigger the restart. */
2446 if (s
->state
== SERVICE_AUTO_RESTART
)
2449 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2451 /* Make sure we don't enter a busy loop of some kind. */
2452 r
= unit_test_start_limit(u
);
2454 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
2458 r
= unit_acquire_invocation_id(u
);
2462 s
->result
= SERVICE_SUCCESS
;
2463 s
->reload_result
= SERVICE_SUCCESS
;
2464 s
->main_pid_known
= false;
2465 s
->main_pid_alien
= false;
2466 s
->forbid_restart
= false;
2468 s
->status_text
= mfree(s
->status_text
);
2469 s
->status_errno
= 0;
2471 s
->notify_state
= NOTIFY_UNKNOWN
;
2473 s
->watchdog_original_usec
= s
->watchdog_usec
;
2474 s
->watchdog_override_enable
= false;
2475 s
->watchdog_override_usec
= USEC_INFINITY
;
2477 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2478 exec_status_reset(&s
->main_exec_status
);
2480 /* This is not an automatic restart? Flush the restart counter then */
2481 if (s
->flush_n_restarts
) {
2483 s
->flush_n_restarts
= false;
2486 u
->reset_accounting
= true;
2488 service_enter_condition(s
);
2492 static int service_stop(Unit
*u
) {
2493 Service
*s
= SERVICE(u
);
2497 /* Don't create restart jobs from manual stops. */
2498 s
->forbid_restart
= true;
2501 if (IN_SET(s
->state
,
2502 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2503 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2506 /* A restart will be scheduled or is in progress. */
2507 if (s
->state
== SERVICE_AUTO_RESTART
) {
2508 service_set_state(s
, SERVICE_DEAD
);
2512 /* If there's already something running we go directly into
2514 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2515 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2519 /* If we are currently cleaning, then abort it, brutally. */
2520 if (s
->state
== SERVICE_CLEANING
) {
2521 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2525 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2527 service_enter_stop(s
, SERVICE_SUCCESS
);
2531 static int service_reload(Unit
*u
) {
2532 Service
*s
= SERVICE(u
);
2536 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2538 service_enter_reload(s
);
2542 _pure_
static bool service_can_reload(Unit
*u
) {
2543 Service
*s
= SERVICE(u
);
2547 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2550 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2551 Service
*s
= SERVICE(u
);
2553 ExecCommand
*first
, *c
;
2557 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2559 first
= s
->exec_command
[id
];
2561 /* Figure out where we are in the list by walking back to the beginning */
2562 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2568 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2569 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2570 size_t allocated
= 0, length
= 0;
2571 Service
*s
= SERVICE(u
);
2572 const char *type
, *key
;
2573 ServiceExecCommand id
;
2583 if (command
== s
->control_command
) {
2585 id
= s
->control_command_id
;
2588 id
= SERVICE_EXEC_START
;
2591 idx
= service_exec_command_index(u
, id
, command
);
2593 STRV_FOREACH(arg
, command
->argv
) {
2594 _cleanup_free_
char *e
= NULL
;
2602 if (!GREEDY_REALLOC(args
, allocated
, length
+ 2 + n
+ 2))
2606 args
[length
++] = ' ';
2608 args
[length
++] = '"';
2609 memcpy(args
+ length
, e
, n
);
2611 args
[length
++] = '"';
2614 if (!GREEDY_REALLOC(args
, allocated
, length
+ 1))
2619 p
= cescape(command
->path
);
2623 key
= strjoina(type
, "-command");
2624 (void) serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2629 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2630 Service
*s
= SERVICE(u
);
2638 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2639 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2640 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2642 if (s
->control_pid
> 0)
2643 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2645 if (s
->main_pid_known
&& s
->main_pid
> 0)
2646 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2648 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2649 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2650 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2652 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2653 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2655 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2659 service_serialize_exec_command(u
, f
, s
->control_command
);
2660 service_serialize_exec_command(u
, f
, s
->main_command
);
2662 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2665 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2668 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2672 if (s
->exec_fd_event_source
) {
2673 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2677 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2680 if (UNIT_ISSET(s
->accept_socket
)) {
2681 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2686 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2690 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2691 _cleanup_free_
char *c
= NULL
;
2694 copy
= fdset_put_dup(fds
, fs
->fd
);
2696 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2698 c
= cescape(fs
->fdname
);
2702 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2705 if (s
->main_exec_status
.pid
> 0) {
2706 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2707 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2708 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2710 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2711 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2712 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2716 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2717 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2719 if (s
->watchdog_override_enable
)
2720 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2722 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2723 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2728 static int service_deserialize_exec_command(
2731 const char *value
) {
2733 Service
*s
= SERVICE(u
);
2735 unsigned idx
= 0, i
;
2736 bool control
, found
= false;
2737 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2738 ExecCommand
*command
= NULL
;
2739 _cleanup_free_
char *path
= NULL
;
2740 _cleanup_strv_free_
char **argv
= NULL
;
2742 enum ExecCommandState
{
2743 STATE_EXEC_COMMAND_TYPE
,
2744 STATE_EXEC_COMMAND_INDEX
,
2745 STATE_EXEC_COMMAND_PATH
,
2746 STATE_EXEC_COMMAND_ARGS
,
2747 _STATE_EXEC_COMMAND_MAX
,
2748 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
2755 control
= streq(key
, "control-command");
2757 state
= STATE_EXEC_COMMAND_TYPE
;
2760 _cleanup_free_
char *arg
= NULL
;
2762 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2769 case STATE_EXEC_COMMAND_TYPE
:
2770 id
= service_exec_command_from_string(arg
);
2774 state
= STATE_EXEC_COMMAND_INDEX
;
2776 case STATE_EXEC_COMMAND_INDEX
:
2777 r
= safe_atou(arg
, &idx
);
2781 state
= STATE_EXEC_COMMAND_PATH
;
2783 case STATE_EXEC_COMMAND_PATH
:
2784 path
= TAKE_PTR(arg
);
2785 state
= STATE_EXEC_COMMAND_ARGS
;
2787 if (!path_is_absolute(path
))
2790 case STATE_EXEC_COMMAND_ARGS
:
2791 r
= strv_extend(&argv
, arg
);
2796 assert_not_reached("Unknown error at deserialization of exec command");
2801 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2804 /* Let's check whether exec command on given offset matches data that we just deserialized */
2805 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2809 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2814 /* Command at the index we serialized is different, let's look for command that exactly
2815 * matches but is on different index. If there is no such command we will not resume execution. */
2816 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2817 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2821 if (command
&& control
) {
2822 s
->control_command
= command
;
2823 s
->control_command_id
= id
;
2825 s
->main_command
= command
;
2827 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2832 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2833 Service
*s
= SERVICE(u
);
2841 if (streq(key
, "state")) {
2844 state
= service_state_from_string(value
);
2846 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2848 s
->deserialized_state
= state
;
2849 } else if (streq(key
, "result")) {
2852 f
= service_result_from_string(value
);
2854 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2855 else if (f
!= SERVICE_SUCCESS
)
2858 } else if (streq(key
, "reload-result")) {
2861 f
= service_result_from_string(value
);
2863 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2864 else if (f
!= SERVICE_SUCCESS
)
2865 s
->reload_result
= f
;
2867 } else if (streq(key
, "control-pid")) {
2870 if (parse_pid(value
, &pid
) < 0)
2871 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2873 s
->control_pid
= pid
;
2874 } else if (streq(key
, "main-pid")) {
2877 if (parse_pid(value
, &pid
) < 0)
2878 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2880 (void) service_set_main_pid(s
, pid
);
2881 } else if (streq(key
, "main-pid-known")) {
2884 b
= parse_boolean(value
);
2886 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2888 s
->main_pid_known
= b
;
2889 } else if (streq(key
, "bus-name-good")) {
2892 b
= parse_boolean(value
);
2894 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2896 s
->bus_name_good
= b
;
2897 } else if (streq(key
, "bus-name-owner")) {
2898 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2900 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2901 } else if (streq(key
, "status-text")) {
2904 r
= cunescape(value
, 0, &t
);
2906 log_unit_debug_errno(u
, r
, "Failed to unescape status text '%s': %m", value
);
2908 free_and_replace(s
->status_text
, t
);
2910 } else if (streq(key
, "accept-socket")) {
2913 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2915 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
2917 unit_ref_set(&s
->accept_socket
, u
, socket
);
2918 SOCKET(socket
)->n_connections
++;
2921 } else if (streq(key
, "socket-fd")) {
2924 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
2925 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
2927 asynchronous_close(s
->socket_fd
);
2928 s
->socket_fd
= fdset_remove(fds
, fd
);
2930 } else if (streq(key
, "fd-store-fd")) {
2931 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
2935 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
2936 if (r
<= 0 || safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
)) {
2937 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
2941 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2943 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2947 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
2949 /* If the value is not present, we assume the default */
2951 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
2952 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
2956 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
2958 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
2960 fdset_remove(fds
, fd
);
2961 } else if (streq(key
, "main-exec-status-pid")) {
2964 if (parse_pid(value
, &pid
) < 0)
2965 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
2967 s
->main_exec_status
.pid
= pid
;
2968 } else if (streq(key
, "main-exec-status-code")) {
2971 if (safe_atoi(value
, &i
) < 0)
2972 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
2974 s
->main_exec_status
.code
= i
;
2975 } else if (streq(key
, "main-exec-status-status")) {
2978 if (safe_atoi(value
, &i
) < 0)
2979 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
2981 s
->main_exec_status
.status
= i
;
2982 } else if (streq(key
, "main-exec-status-start"))
2983 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
2984 else if (streq(key
, "main-exec-status-exit"))
2985 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
2986 else if (streq(key
, "watchdog-timestamp"))
2987 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
2988 else if (streq(key
, "forbid-restart")) {
2991 b
= parse_boolean(value
);
2993 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
2995 s
->forbid_restart
= b
;
2996 } else if (streq(key
, "stdin-fd")) {
2999 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3000 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3002 asynchronous_close(s
->stdin_fd
);
3003 s
->stdin_fd
= fdset_remove(fds
, fd
);
3004 s
->exec_context
.stdio_as_fds
= true;
3006 } else if (streq(key
, "stdout-fd")) {
3009 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3010 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3012 asynchronous_close(s
->stdout_fd
);
3013 s
->stdout_fd
= fdset_remove(fds
, fd
);
3014 s
->exec_context
.stdio_as_fds
= true;
3016 } else if (streq(key
, "stderr-fd")) {
3019 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3020 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3022 asynchronous_close(s
->stderr_fd
);
3023 s
->stderr_fd
= fdset_remove(fds
, fd
);
3024 s
->exec_context
.stdio_as_fds
= true;
3026 } else if (streq(key
, "exec-fd")) {
3029 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3030 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3032 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3034 fd
= fdset_remove(fds
, fd
);
3035 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3038 } else if (streq(key
, "watchdog-override-usec")) {
3039 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3040 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3042 s
->watchdog_override_enable
= true;
3044 } else if (streq(key
, "watchdog-original-usec")) {
3045 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3046 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3048 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3049 r
= service_deserialize_exec_command(u
, key
, value
);
3051 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3053 } else if (streq(key
, "n-restarts")) {
3054 r
= safe_atou(value
, &s
->n_restarts
);
3056 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3058 } else if (streq(key
, "flush-n-restarts")) {
3059 r
= parse_boolean(value
);
3061 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3063 s
->flush_n_restarts
= r
;
3065 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3070 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3071 const UnitActiveState
*table
;
3075 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3077 return table
[SERVICE(u
)->state
];
3080 static const char *service_sub_state_to_string(Unit
*u
) {
3083 return service_state_to_string(SERVICE(u
)->state
);
3086 static bool service_may_gc(Unit
*u
) {
3087 Service
*s
= SERVICE(u
);
3091 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3092 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3093 * have moved outside of the cgroup. */
3095 if (main_pid_good(s
) > 0 ||
3096 control_pid_good(s
) > 0)
3102 static int service_retry_pid_file(Service
*s
) {
3105 assert(s
->pid_file
);
3106 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3108 r
= service_load_pid_file(s
, false);
3112 service_unwatch_pid_file(s
);
3114 service_enter_running(s
, SERVICE_SUCCESS
);
3118 static int service_watch_pid_file(Service
*s
) {
3121 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3123 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3127 /* the pidfile might have appeared just before we set the watch */
3128 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3129 service_retry_pid_file(s
);
3133 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3134 service_unwatch_pid_file(s
);
3138 static int service_demand_pid_file(Service
*s
) {
3141 assert(s
->pid_file
);
3142 assert(!s
->pid_file_pathspec
);
3144 ps
= new0(PathSpec
, 1);
3149 ps
->path
= strdup(s
->pid_file
);
3155 path_simplify(ps
->path
, false);
3157 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3158 * keep their PID file open all the time. */
3159 ps
->type
= PATH_MODIFIED
;
3160 ps
->inotify_fd
= -1;
3162 s
->pid_file_pathspec
= ps
;
3164 return service_watch_pid_file(s
);
3167 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3168 PathSpec
*p
= userdata
;
3173 s
= SERVICE(p
->unit
);
3177 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3178 assert(s
->pid_file_pathspec
);
3179 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3181 log_unit_debug(UNIT(s
), "inotify event");
3183 if (path_spec_fd_event(p
, events
) < 0)
3186 if (service_retry_pid_file(s
) == 0)
3189 if (service_watch_pid_file(s
) < 0)
3195 service_unwatch_pid_file(s
);
3196 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3200 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3201 Service
*s
= SERVICE(userdata
);
3205 log_unit_debug(UNIT(s
), "got exec-fd event");
3207 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3208 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3209 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3210 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3211 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3212 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3213 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3214 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3220 n
= read(fd
, &x
, sizeof(x
));
3222 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3225 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3227 if (n
== 0) { /* EOF → the event we are waiting for */
3229 s
->exec_fd_event_source
= sd_event_source_unref(s
->exec_fd_event_source
);
3231 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3232 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3234 s
->exec_fd_hot
= false;
3236 /* Nice! This is what we have been waiting for. Transition to next state. */
3237 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3238 service_enter_start_post(s
);
3240 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3245 /* A byte was read → this turns on/off the exec fd logic */
3246 assert(n
== sizeof(x
));
3253 static void service_notify_cgroup_empty_event(Unit
*u
) {
3254 Service
*s
= SERVICE(u
);
3258 log_unit_debug(u
, "Control group is empty.");
3262 /* Waiting for SIGCHLD is usually more interesting,
3263 * because it includes return codes/signals. Which is
3264 * why we ignore the cgroup events for most cases,
3265 * except when we don't know pid which to expect the
3269 if (s
->type
== SERVICE_NOTIFY
&&
3270 main_pid_good(s
) == 0 &&
3271 control_pid_good(s
) == 0) {
3272 /* No chance of getting a ready notification anymore */
3273 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3278 case SERVICE_START_POST
:
3279 if (s
->pid_file_pathspec
&&
3280 main_pid_good(s
) == 0 &&
3281 control_pid_good(s
) == 0) {
3283 /* Give up hoping for the daemon to write its PID file */
3284 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3286 service_unwatch_pid_file(s
);
3287 if (s
->state
== SERVICE_START
)
3288 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3290 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3294 case SERVICE_RUNNING
:
3295 /* service_enter_running() will figure out what to do */
3296 service_enter_running(s
, SERVICE_SUCCESS
);
3299 case SERVICE_STOP_WATCHDOG
:
3300 case SERVICE_STOP_SIGTERM
:
3301 case SERVICE_STOP_SIGKILL
:
3303 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3304 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3308 case SERVICE_STOP_POST
:
3309 case SERVICE_FINAL_WATCHDOG
:
3310 case SERVICE_FINAL_SIGTERM
:
3311 case SERVICE_FINAL_SIGKILL
:
3312 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3313 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3317 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3318 * up the cgroup earlier and should do it now. */
3320 case SERVICE_FAILED
:
3321 unit_prune_cgroup(u
);
3329 static void service_notify_cgroup_oom_event(Unit
*u
) {
3330 Service
*s
= SERVICE(u
);
3332 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3334 if (s
->oom_policy
== OOM_CONTINUE
)
3339 case SERVICE_CONDITION
:
3340 case SERVICE_START_PRE
:
3342 case SERVICE_START_POST
:
3344 if (s
->oom_policy
== OOM_STOP
)
3345 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3346 else if (s
->oom_policy
== OOM_KILL
)
3347 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3351 case SERVICE_EXITED
:
3352 case SERVICE_RUNNING
:
3353 if (s
->oom_policy
== OOM_STOP
)
3354 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3355 else if (s
->oom_policy
== OOM_KILL
)
3356 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3360 case SERVICE_STOP_WATCHDOG
:
3361 case SERVICE_STOP_SIGTERM
:
3362 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3365 case SERVICE_STOP_SIGKILL
:
3366 case SERVICE_FINAL_SIGKILL
:
3367 if (s
->result
== SERVICE_SUCCESS
)
3368 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3371 case SERVICE_STOP_POST
:
3372 case SERVICE_FINAL_SIGTERM
:
3373 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3381 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3382 bool notify_dbus
= true;
3383 Service
*s
= SERVICE(u
);
3385 ExitClean clean_mode
;
3390 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3391 * considered daemons as they are typically not long running. */
3392 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3393 clean_mode
= EXIT_CLEAN_COMMAND
;
3395 clean_mode
= EXIT_CLEAN_DAEMON
;
3397 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3398 f
= SERVICE_SUCCESS
;
3399 else if (code
== CLD_EXITED
)
3400 f
= SERVICE_FAILURE_EXIT_CODE
;
3401 else if (code
== CLD_KILLED
)
3402 f
= SERVICE_FAILURE_SIGNAL
;
3403 else if (code
== CLD_DUMPED
)
3404 f
= SERVICE_FAILURE_CORE_DUMP
;
3406 assert_not_reached("Unknown code");
3408 /* Services with ExitType=cgroup ignore the main PID for purposes of exit status */
3409 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& s
->main_pid
== pid
) {
3410 service_unwatch_main_pid(s
);
3411 s
->main_pid_known
= false;
3414 if ((s
->exit_type
== SERVICE_EXIT_MAIN
&& s
->main_pid
== pid
) ||
3415 (s
->exit_type
== SERVICE_EXIT_CGROUP
&& cgroup_empty(s
) && !control_pid_good(s
))) {
3416 /* Forking services may occasionally move to a new PID.
3417 * As long as they update the PID file before exiting the old
3418 * PID, they're fine. */
3419 if (service_load_pid_file(s
, false) > 0)
3423 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3425 if (s
->main_command
) {
3426 /* If this is not a forking service than the
3427 * main process got started and hence we copy
3428 * the exit status so that it is recorded both
3429 * as main and as control process exit
3432 s
->main_command
->exec_status
= s
->main_exec_status
;
3434 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3435 f
= SERVICE_SUCCESS
;
3436 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3438 /* If this is a forked process, then we should
3439 * ignore the return value if this was
3440 * configured for the starter process */
3442 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3443 f
= SERVICE_SUCCESS
;
3446 unit_log_process_exit(
3448 s
->exit_type
== SERVICE_EXIT_CGROUP
? "Last process" : "Main process",
3449 service_exec_command_to_string(SERVICE_EXEC_START
),
3450 f
== SERVICE_SUCCESS
,
3453 if (s
->result
== SERVICE_SUCCESS
)
3456 if (s
->main_command
&&
3457 s
->main_command
->command_next
&&
3458 s
->type
== SERVICE_ONESHOT
&&
3459 f
== SERVICE_SUCCESS
) {
3461 /* There is another command to *
3462 * execute, so let's do that. */
3464 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3465 service_run_next_main(s
);
3469 /* The service exited, so the service is officially
3471 s
->main_command
= NULL
;
3475 case SERVICE_START_POST
:
3476 case SERVICE_RELOAD
:
3478 /* Need to wait until the operation is
3483 if (s
->type
== SERVICE_ONESHOT
) {
3484 /* This was our main goal, so let's go on */
3485 if (f
== SERVICE_SUCCESS
)
3486 service_enter_start_post(s
);
3488 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3490 } else if (s
->type
== SERVICE_NOTIFY
) {
3491 /* Only enter running through a notification, so that the
3492 * SERVICE_START state signifies that no ready notification
3493 * has been received */
3494 if (f
!= SERVICE_SUCCESS
)
3495 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3496 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3497 /* The service has never been and will never be active */
3498 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3503 case SERVICE_RUNNING
:
3504 service_enter_running(s
, f
);
3507 case SERVICE_STOP_WATCHDOG
:
3508 case SERVICE_STOP_SIGTERM
:
3509 case SERVICE_STOP_SIGKILL
:
3511 if (control_pid_good(s
) <= 0)
3512 service_enter_stop_post(s
, f
);
3514 /* If there is still a control process, wait for that first */
3517 case SERVICE_STOP_POST
:
3519 if (control_pid_good(s
) <= 0)
3520 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3524 case SERVICE_FINAL_WATCHDOG
:
3525 case SERVICE_FINAL_SIGTERM
:
3526 case SERVICE_FINAL_SIGKILL
:
3528 if (control_pid_good(s
) <= 0)
3529 service_enter_dead(s
, f
, true);
3533 assert_not_reached("Uh, main process died at wrong time.");
3537 } else if (s
->control_pid
== pid
) {
3540 if (s
->control_command
) {
3541 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3543 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3544 f
= SERVICE_SUCCESS
;
3547 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3548 if (s
->state
== SERVICE_CONDITION
) {
3549 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3550 UNIT(s
)->condition_result
= false;
3551 f
= SERVICE_SKIP_CONDITION
;
3552 } else if (f
== SERVICE_SUCCESS
)
3553 UNIT(s
)->condition_result
= true;
3556 unit_log_process_exit(
3559 service_exec_command_to_string(s
->control_command_id
),
3560 f
== SERVICE_SUCCESS
,
3563 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3566 if (s
->control_command
&&
3567 s
->control_command
->command_next
&&
3568 f
== SERVICE_SUCCESS
) {
3570 /* There is another command to *
3571 * execute, so let's do that. */
3573 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3574 service_run_next_control(s
);
3577 /* No further commands for this step, so let's
3578 * figure out what to do next */
3580 s
->control_command
= NULL
;
3581 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3583 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3587 case SERVICE_CONDITION
:
3588 if (f
== SERVICE_SUCCESS
)
3589 service_enter_start_pre(s
);
3591 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3594 case SERVICE_START_PRE
:
3595 if (f
== SERVICE_SUCCESS
)
3596 service_enter_start(s
);
3598 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3602 if (s
->type
!= SERVICE_FORKING
)
3603 /* Maybe spurious event due to a reload that changed the type? */
3606 if (f
!= SERVICE_SUCCESS
) {
3607 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3612 bool has_start_post
;
3615 /* Let's try to load the pid file here if we can.
3616 * The PID file might actually be created by a START_POST
3617 * script. In that case don't worry if the loading fails. */
3619 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3620 r
= service_load_pid_file(s
, !has_start_post
);
3621 if (!has_start_post
&& r
< 0) {
3622 r
= service_demand_pid_file(s
);
3623 if (r
< 0 || cgroup_good(s
) == 0)
3624 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3628 service_search_main_pid(s
);
3630 service_enter_start_post(s
);
3633 case SERVICE_START_POST
:
3634 if (f
!= SERVICE_SUCCESS
) {
3635 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3642 r
= service_load_pid_file(s
, true);
3644 r
= service_demand_pid_file(s
);
3645 if (r
< 0 || cgroup_good(s
) == 0)
3646 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3650 service_search_main_pid(s
);
3652 service_enter_running(s
, SERVICE_SUCCESS
);
3655 case SERVICE_RELOAD
:
3656 if (f
== SERVICE_SUCCESS
)
3657 if (service_load_pid_file(s
, true) < 0)
3658 service_search_main_pid(s
);
3660 s
->reload_result
= f
;
3661 service_enter_running(s
, SERVICE_SUCCESS
);
3665 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3668 case SERVICE_STOP_WATCHDOG
:
3669 case SERVICE_STOP_SIGTERM
:
3670 case SERVICE_STOP_SIGKILL
:
3671 if (main_pid_good(s
) <= 0)
3672 service_enter_stop_post(s
, f
);
3674 /* If there is still a service process around, wait until
3675 * that one quit, too */
3678 case SERVICE_STOP_POST
:
3679 if (main_pid_good(s
) <= 0)
3680 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3683 case SERVICE_FINAL_WATCHDOG
:
3684 case SERVICE_FINAL_SIGTERM
:
3685 case SERVICE_FINAL_SIGKILL
:
3686 if (main_pid_good(s
) <= 0)
3687 service_enter_dead(s
, f
, true);
3690 case SERVICE_CLEANING
:
3692 if (s
->clean_result
== SERVICE_SUCCESS
)
3693 s
->clean_result
= f
;
3695 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3699 assert_not_reached("Uh, control process died at wrong time.");
3702 } else /* Neither control nor main PID? If so, don't notify about anything */
3703 notify_dbus
= false;
3705 /* Notify clients about changed exit status */
3707 unit_add_to_dbus_queue(u
);
3709 /* We watch the main/control process otherwise we can't retrieve the unit they
3710 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3711 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3712 * detect when the cgroup becomes empty. Note that the control process is always
3713 * our child so it's pointless to watch all other processes. */
3714 if (!control_pid_good(s
))
3715 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3716 (void) unit_enqueue_rewatch_pids(u
);
3719 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3720 Service
*s
= SERVICE(userdata
);
3723 assert(source
== s
->timer_event_source
);
3727 case SERVICE_CONDITION
:
3728 case SERVICE_START_PRE
:
3730 case SERVICE_START_POST
:
3731 switch (s
->timeout_start_failure_mode
) {
3733 case SERVICE_TIMEOUT_TERMINATE
:
3734 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3735 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3738 case SERVICE_TIMEOUT_ABORT
:
3739 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
3740 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3743 case SERVICE_TIMEOUT_KILL
:
3744 if (s
->kill_context
.send_sigkill
) {
3745 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
3746 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3748 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
3749 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3754 assert_not_reached("unknown timeout mode");
3758 case SERVICE_RUNNING
:
3759 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3760 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3763 case SERVICE_RELOAD
:
3764 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3765 service_kill_control_process(s
);
3766 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3767 service_enter_running(s
, SERVICE_SUCCESS
);
3771 switch (s
->timeout_stop_failure_mode
) {
3773 case SERVICE_TIMEOUT_TERMINATE
:
3774 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3775 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3778 case SERVICE_TIMEOUT_ABORT
:
3779 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
3780 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3783 case SERVICE_TIMEOUT_KILL
:
3784 if (s
->kill_context
.send_sigkill
) {
3785 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
3786 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3788 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
3789 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3794 assert_not_reached("unknown timeout mode");
3798 case SERVICE_STOP_WATCHDOG
:
3799 if (s
->kill_context
.send_sigkill
) {
3800 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
3801 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3803 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
3804 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3808 case SERVICE_STOP_SIGTERM
:
3809 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3810 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
3811 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3812 } else if (s
->kill_context
.send_sigkill
) {
3813 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3814 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3816 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3817 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3822 case SERVICE_STOP_SIGKILL
:
3823 /* Uh, we sent a SIGKILL and it is still not gone?
3824 * Must be something we cannot kill, so let's just be
3825 * weirded out and continue */
3827 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3828 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3831 case SERVICE_STOP_POST
:
3832 switch (s
->timeout_stop_failure_mode
) {
3834 case SERVICE_TIMEOUT_TERMINATE
:
3835 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3836 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3839 case SERVICE_TIMEOUT_ABORT
:
3840 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
3841 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3844 case SERVICE_TIMEOUT_KILL
:
3845 if (s
->kill_context
.send_sigkill
) {
3846 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
3847 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3849 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
3850 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3855 assert_not_reached("unknown timeout mode");
3859 case SERVICE_FINAL_WATCHDOG
:
3860 if (s
->kill_context
.send_sigkill
) {
3861 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
3862 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3864 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
3865 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3869 case SERVICE_FINAL_SIGTERM
:
3870 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3871 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
3872 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3873 } else if (s
->kill_context
.send_sigkill
) {
3874 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
3875 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3877 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3878 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3883 case SERVICE_FINAL_SIGKILL
:
3884 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3885 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3888 case SERVICE_AUTO_RESTART
:
3889 if (s
->restart_usec
> 0) {
3890 char buf_restart
[FORMAT_TIMESPAN_MAX
];
3891 log_unit_debug(UNIT(s
),
3892 "Service RestartSec=%s expired, scheduling restart.",
3893 format_timespan(buf_restart
, sizeof buf_restart
, s
->restart_usec
, USEC_PER_SEC
));
3895 log_unit_debug(UNIT(s
),
3896 "Service has no hold-off time (RestartSec=0), scheduling restart.");
3898 service_enter_restart(s
);
3901 case SERVICE_CLEANING
:
3902 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
3904 if (s
->clean_result
== SERVICE_SUCCESS
)
3905 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
3907 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
3911 assert_not_reached("Timeout at wrong time.");
3917 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3918 Service
*s
= SERVICE(userdata
);
3919 char t
[FORMAT_TIMESPAN_MAX
];
3920 usec_t watchdog_usec
;
3923 assert(source
== s
->watchdog_event_source
);
3925 watchdog_usec
= service_get_watchdog_usec(s
);
3927 if (UNIT(s
)->manager
->service_watchdogs
) {
3928 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
3929 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3931 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3933 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
3934 format_timespan(t
, sizeof(t
), watchdog_usec
, 1));
3939 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
3942 if (s
->notify_access
== NOTIFY_NONE
) {
3943 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
3947 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
3948 if (s
->main_pid
!= 0)
3949 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
);
3951 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
);
3956 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
3957 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
3958 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
,
3959 pid
, s
->main_pid
, s
->control_pid
);
3960 else if (s
->main_pid
!= 0)
3961 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
);
3962 else if (s
->control_pid
!= 0)
3963 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
);
3965 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
);
3973 static void service_force_watchdog(Service
*s
) {
3974 if (!UNIT(s
)->manager
->service_watchdogs
)
3977 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
3978 s
->status_text
? s
->status_text
: "<unset>");
3980 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
3983 static void service_notify_message(
3985 const struct ucred
*ucred
,
3989 Service
*s
= SERVICE(u
);
3990 bool notify_dbus
= false;
3998 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, fds
))
4001 if (DEBUG_LOGGING
) {
4002 _cleanup_free_
char *cc
= NULL
;
4004 cc
= strv_join(tags
, ", ");
4005 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4008 /* Interpret MAINPID= */
4009 e
= strv_find_startswith(tags
, "MAINPID=");
4010 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
4013 if (parse_pid(e
, &new_main_pid
) < 0)
4014 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4015 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4017 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4019 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4021 if (ucred
->uid
== 0) {
4022 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
);
4025 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4028 service_set_main_pid(s
, new_main_pid
);
4030 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4032 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4039 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
4040 STRV_FOREACH_BACKWARDS(i
, tags
) {
4042 if (streq(*i
, "READY=1")) {
4043 s
->notify_state
= NOTIFY_READY
;
4045 /* Type=notify services inform us about completed
4046 * initialization with READY=1 */
4047 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
4048 service_enter_start_post(s
);
4050 /* Sending READY=1 while we are reloading informs us
4051 * that the reloading is complete */
4052 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
4053 service_enter_running(s
, SERVICE_SUCCESS
);
4058 } else if (streq(*i
, "RELOADING=1")) {
4059 s
->notify_state
= NOTIFY_RELOADING
;
4061 if (s
->state
== SERVICE_RUNNING
)
4062 service_enter_reload_by_notify(s
);
4067 } else if (streq(*i
, "STOPPING=1")) {
4068 s
->notify_state
= NOTIFY_STOPPING
;
4070 if (s
->state
== SERVICE_RUNNING
)
4071 service_enter_stop_by_notify(s
);
4078 /* Interpret STATUS= */
4079 e
= strv_find_startswith(tags
, "STATUS=");
4081 _cleanup_free_
char *t
= NULL
;
4084 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4085 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4086 if (strlen(e
) > STATUS_TEXT_MAX
)
4087 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4088 else if (!utf8_is_valid(e
))
4089 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4097 if (!streq_ptr(s
->status_text
, t
)) {
4098 free_and_replace(s
->status_text
, t
);
4103 /* Interpret ERRNO= */
4104 e
= strv_find_startswith(tags
, "ERRNO=");
4108 status_errno
= parse_errno(e
);
4109 if (status_errno
< 0)
4110 log_unit_warning_errno(u
, status_errno
,
4111 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4112 else if (s
->status_errno
!= status_errno
) {
4113 s
->status_errno
= status_errno
;
4118 /* Interpret EXTEND_TIMEOUT= */
4119 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4121 usec_t extend_timeout_usec
;
4122 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4123 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4125 service_extend_timeout(s
, extend_timeout_usec
);
4128 /* Interpret WATCHDOG= */
4129 e
= strv_find_startswith(tags
, "WATCHDOG=");
4132 service_reset_watchdog(s
);
4133 else if (streq(e
, "trigger"))
4134 service_force_watchdog(s
);
4136 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4139 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4141 usec_t watchdog_override_usec
;
4142 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4143 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4145 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4148 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4149 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4150 * fds, but optional when pushing in new fds, for compatibility reasons. */
4151 if (strv_find(tags
, "FDSTOREREMOVE=1")) {
4154 name
= strv_find_startswith(tags
, "FDNAME=");
4155 if (!name
|| !fdname_is_valid(name
))
4156 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4158 service_remove_fd_store(s
, name
);
4160 } else if (strv_find(tags
, "FDSTORE=1")) {
4163 name
= strv_find_startswith(tags
, "FDNAME=");
4164 if (name
&& !fdname_is_valid(name
)) {
4165 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4169 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4172 /* Notify clients about changed status or main pid */
4174 unit_add_to_dbus_queue(u
);
4177 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4178 Service
*s
= SERVICE(u
);
4182 if (!s
->timer_event_source
)
4185 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4188 if (t
== USEC_INFINITY
)
4195 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4197 Service
*s
= SERVICE(u
);
4203 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4205 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4207 s
->bus_name_good
= new_owner
;
4209 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4210 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4212 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4216 if (s
->type
== SERVICE_DBUS
) {
4218 /* service_enter_running() will figure out what to
4220 if (s
->state
== SERVICE_RUNNING
)
4221 service_enter_running(s
, SERVICE_SUCCESS
);
4222 else if (s
->state
== SERVICE_START
&& new_owner
)
4223 service_enter_start_post(s
);
4225 } else if (new_owner
&&
4233 _cleanup_(sd_bus_creds_unrefp
) sd_bus_creds
*creds
= NULL
;
4236 /* Try to acquire PID from bus service */
4238 r
= sd_bus_get_name_creds(u
->manager
->api_bus
, s
->bus_name
, SD_BUS_CREDS_PID
, &creds
);
4240 r
= sd_bus_creds_get_pid(creds
, &pid
);
4242 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, pid
);
4244 service_set_main_pid(s
, pid
);
4245 unit_watch_pid(UNIT(s
), pid
, false);
4250 int service_set_socket_fd(Service
*s
, int fd
, Socket
*sock
, bool selinux_context_net
) {
4251 _cleanup_free_
char *peer
= NULL
;
4257 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4258 * to be configured. We take ownership of the passed fd on success. */
4260 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4263 if (s
->socket_fd
>= 0)
4266 if (s
->state
!= SERVICE_DEAD
)
4269 if (getpeername_pretty(fd
, true, &peer
) >= 0) {
4271 if (UNIT(s
)->description
) {
4272 _cleanup_free_
char *a
;
4274 a
= strjoin(UNIT(s
)->description
, " (", peer
, ")");
4278 r
= unit_set_description(UNIT(s
), a
);
4280 r
= unit_set_description(UNIT(s
), peer
);
4286 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4291 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4293 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4297 static void service_reset_failed(Unit
*u
) {
4298 Service
*s
= SERVICE(u
);
4302 if (s
->state
== SERVICE_FAILED
)
4303 service_set_state(s
, SERVICE_DEAD
);
4305 s
->result
= SERVICE_SUCCESS
;
4306 s
->reload_result
= SERVICE_SUCCESS
;
4307 s
->clean_result
= SERVICE_SUCCESS
;
4309 s
->flush_n_restarts
= false;
4312 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4313 Service
*s
= SERVICE(u
);
4317 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4320 static int service_main_pid(Unit
*u
) {
4321 Service
*s
= SERVICE(u
);
4328 static int service_control_pid(Unit
*u
) {
4329 Service
*s
= SERVICE(u
);
4333 return s
->control_pid
;
4336 static bool service_needs_console(Unit
*u
) {
4337 Service
*s
= SERVICE(u
);
4341 /* We provide our own implementation of this here, instead of relying of the generic implementation
4342 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4344 if (!exec_context_may_touch_console(&s
->exec_context
))
4347 return IN_SET(s
->state
,
4355 SERVICE_STOP_WATCHDOG
,
4356 SERVICE_STOP_SIGTERM
,
4357 SERVICE_STOP_SIGKILL
,
4359 SERVICE_FINAL_WATCHDOG
,
4360 SERVICE_FINAL_SIGTERM
,
4361 SERVICE_FINAL_SIGKILL
);
4364 static int service_exit_status(Unit
*u
) {
4365 Service
*s
= SERVICE(u
);
4369 if (s
->main_exec_status
.pid
<= 0 ||
4370 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4373 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4376 return s
->main_exec_status
.status
;
4379 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4380 _cleanup_strv_free_
char **l
= NULL
;
4381 Service
*s
= SERVICE(u
);
4387 if (s
->state
!= SERVICE_DEAD
)
4390 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4394 if (strv_isempty(l
))
4397 service_unwatch_control_pid(s
);
4398 s
->clean_result
= SERVICE_SUCCESS
;
4399 s
->control_command
= NULL
;
4400 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4402 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4406 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4410 service_set_state(s
, SERVICE_CLEANING
);
4415 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4416 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4417 s
->timer_event_source
= sd_event_source_unref(s
->timer_event_source
);
4421 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4422 Service
*s
= SERVICE(u
);
4426 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4429 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4430 if (t
== JOB_START
&& result
== JOB_DONE
) {
4431 Service
*s
= SERVICE(u
);
4433 if (s
->type
== SERVICE_ONESHOT
)
4434 return "Finished %s.";
4437 /* Fall back to generic */
4441 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4442 [SERVICE_RESTART_NO
] = "no",
4443 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4444 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4445 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4446 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4447 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4448 [SERVICE_RESTART_ALWAYS
] = "always",
4451 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4453 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4454 [SERVICE_SIMPLE
] = "simple",
4455 [SERVICE_FORKING
] = "forking",
4456 [SERVICE_ONESHOT
] = "oneshot",
4457 [SERVICE_DBUS
] = "dbus",
4458 [SERVICE_NOTIFY
] = "notify",
4459 [SERVICE_IDLE
] = "idle",
4460 [SERVICE_EXEC
] = "exec",
4463 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4465 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
4466 [SERVICE_EXIT_MAIN
] = "main",
4467 [SERVICE_EXIT_CGROUP
] = "cgroup",
4470 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
4472 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4473 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4474 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4475 [SERVICE_EXEC_START
] = "ExecStart",
4476 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4477 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4478 [SERVICE_EXEC_STOP
] = "ExecStop",
4479 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4482 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4484 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4485 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4486 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4487 [SERVICE_EXEC_START
] = "ExecStartEx",
4488 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4489 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4490 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4491 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4494 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4496 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4497 [NOTIFY_UNKNOWN
] = "unknown",
4498 [NOTIFY_READY
] = "ready",
4499 [NOTIFY_RELOADING
] = "reloading",
4500 [NOTIFY_STOPPING
] = "stopping",
4503 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4505 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4506 [SERVICE_SUCCESS
] = "success",
4507 [SERVICE_FAILURE_RESOURCES
] = "resources",
4508 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4509 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4510 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4511 [SERVICE_FAILURE_SIGNAL
] = "signal",
4512 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4513 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4514 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4515 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4516 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4519 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4521 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
4522 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
4523 [SERVICE_TIMEOUT_ABORT
] = "abort",
4524 [SERVICE_TIMEOUT_KILL
] = "kill",
4527 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
4529 const UnitVTable service_vtable
= {
4530 .object_size
= sizeof(Service
),
4531 .exec_context_offset
= offsetof(Service
, exec_context
),
4532 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4533 .kill_context_offset
= offsetof(Service
, kill_context
),
4534 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4535 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4541 .private_section
= "Service",
4543 .can_transient
= true,
4544 .can_delegate
= true,
4546 .can_set_managed_oom
= true,
4548 .init
= service_init
,
4549 .done
= service_done
,
4550 .load
= service_load
,
4551 .release_resources
= service_release_resources
,
4553 .coldplug
= service_coldplug
,
4555 .dump
= service_dump
,
4557 .start
= service_start
,
4558 .stop
= service_stop
,
4559 .reload
= service_reload
,
4561 .can_reload
= service_can_reload
,
4563 .kill
= service_kill
,
4564 .clean
= service_clean
,
4565 .can_clean
= service_can_clean
,
4567 .freeze
= unit_freeze_vtable_common
,
4568 .thaw
= unit_thaw_vtable_common
,
4570 .serialize
= service_serialize
,
4571 .deserialize_item
= service_deserialize_item
,
4573 .active_state
= service_active_state
,
4574 .sub_state_to_string
= service_sub_state_to_string
,
4576 .will_restart
= service_will_restart
,
4578 .may_gc
= service_may_gc
,
4580 .sigchld_event
= service_sigchld_event
,
4582 .reset_failed
= service_reset_failed
,
4584 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4585 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4586 .notify_message
= service_notify_message
,
4588 .main_pid
= service_main_pid
,
4589 .control_pid
= service_control_pid
,
4591 .bus_name_owner_change
= service_bus_name_owner_change
,
4593 .bus_set_property
= bus_service_set_property
,
4594 .bus_commit_properties
= bus_service_commit_properties
,
4596 .get_timeout
= service_get_timeout
,
4597 .needs_console
= service_needs_console
,
4598 .exit_status
= service_exit_status
,
4600 .status_message_formats
= {
4601 .starting_stopping
= {
4602 [0] = "Starting %s...",
4603 [1] = "Stopping %s...",
4605 .finished_start_job
= {
4606 [JOB_FAILED
] = "Failed to start %s.",
4608 .finished_stop_job
= {
4609 [JOB_DONE
] = "Stopped %s.",
4610 [JOB_FAILED
] = "Stopped (with error) %s.",
4612 .finished_job
= service_finished_job
,