1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
9 #include "sd-messages.h"
11 #include "alloc-util.h"
13 #include "bus-error.h"
14 #include "bus-kernel.h"
17 #include "constants.h"
18 #include "dbus-service.h"
19 #include "dbus-unit.h"
20 #include "devnum-util.h"
23 #include "exit-status.h"
26 #include "format-util.h"
27 #include "load-dropin.h"
28 #include "load-fragment.h"
31 #include "open-file.h"
32 #include "parse-util.h"
33 #include "path-util.h"
34 #include "process-util.h"
35 #include "random-util.h"
36 #include "serialize.h"
38 #include "signal-util.h"
40 #include "stdio-util.h"
41 #include "string-table.h"
42 #include "string-util.h"
44 #include "unit-name.h"
48 #define service_spawn(...) service_spawn_internal(__func__, __VA_ARGS__)
50 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
51 [SERVICE_DEAD
] = UNIT_INACTIVE
,
52 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
53 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
54 [SERVICE_START
] = UNIT_ACTIVATING
,
55 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
56 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
57 [SERVICE_EXITED
] = UNIT_ACTIVE
,
58 [SERVICE_RELOAD
] = UNIT_RELOADING
,
59 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
60 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
61 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
62 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
63 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
64 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
65 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
66 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
67 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
68 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
69 [SERVICE_FAILED
] = UNIT_FAILED
,
70 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
71 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
72 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
73 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
74 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
77 /* For Type=idle we never want to delay any other jobs, hence we
78 * consider idle jobs active as soon as we start working on them */
79 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
80 [SERVICE_DEAD
] = UNIT_INACTIVE
,
81 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
82 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
83 [SERVICE_START
] = UNIT_ACTIVE
,
84 [SERVICE_START_POST
] = UNIT_ACTIVE
,
85 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
86 [SERVICE_EXITED
] = UNIT_ACTIVE
,
87 [SERVICE_RELOAD
] = UNIT_RELOADING
,
88 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
89 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
90 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
91 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
92 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
93 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
94 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
95 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
96 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
97 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
98 [SERVICE_FAILED
] = UNIT_FAILED
,
99 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
100 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
101 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
102 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
103 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
106 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
107 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
108 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
109 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
111 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
112 static void service_enter_reload_by_notify(Service
*s
);
114 static void service_init(Unit
*u
) {
115 Service
*s
= SERVICE(u
);
118 assert(u
->load_state
== UNIT_STUB
);
120 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
121 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
122 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
123 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
124 s
->restart_usec
= u
->manager
->default_restart_usec
;
125 s
->restart_max_delay_usec
= USEC_INFINITY
;
126 s
->runtime_max_usec
= USEC_INFINITY
;
127 s
->type
= _SERVICE_TYPE_INVALID
;
128 s
->socket_fd
= -EBADF
;
129 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -EBADF
;
130 s
->guess_main_pid
= true;
132 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
134 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
135 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
137 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
139 s
->watchdog_original_usec
= USEC_INFINITY
;
141 s
->oom_policy
= _OOM_POLICY_INVALID
;
142 s
->reload_begin_usec
= USEC_INFINITY
;
143 s
->reload_signal
= SIGHUP
;
145 s
->fd_store_preserve_mode
= EXEC_PRESERVE_RESTART
;
148 static void service_unwatch_control_pid(Service
*s
) {
151 if (s
->control_pid
<= 0)
154 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->control_pid
));
157 static void service_unwatch_main_pid(Service
*s
) {
160 if (s
->main_pid
<= 0)
163 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->main_pid
));
166 static void service_unwatch_pid_file(Service
*s
) {
167 if (!s
->pid_file_pathspec
)
170 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
171 path_spec_unwatch(s
->pid_file_pathspec
);
172 path_spec_done(s
->pid_file_pathspec
);
173 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
176 static int service_set_main_pid(Service
*s
, pid_t pid
) {
182 if (pid
== getpid_cached())
185 if (s
->main_pid
== pid
&& s
->main_pid_known
)
188 if (s
->main_pid
!= pid
) {
189 service_unwatch_main_pid(s
);
190 exec_status_start(&s
->main_exec_status
, pid
);
194 s
->main_pid_known
= true;
195 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
197 if (s
->main_pid_alien
)
198 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
203 void service_release_socket_fd(Service
*s
) {
206 if (s
->socket_fd
< 0 && !UNIT_ISSET(s
->accept_socket
) && !s
->socket_peer
)
209 log_unit_debug(UNIT(s
), "Closing connection socket.");
211 /* Undo the effect of service_set_socket_fd(). */
213 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
215 if (UNIT_ISSET(s
->accept_socket
)) {
216 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
217 unit_ref_unset(&s
->accept_socket
);
220 s
->socket_peer
= socket_peer_unref(s
->socket_peer
);
223 static void service_override_notify_access(Service
*s
, NotifyAccess notify_access_override
) {
226 s
->notify_access_override
= notify_access_override
;
228 log_unit_debug(UNIT(s
), "notify_access=%s", notify_access_to_string(s
->notify_access
));
229 log_unit_debug(UNIT(s
), "notify_access_override=%s", notify_access_to_string(s
->notify_access_override
));
232 static void service_stop_watchdog(Service
*s
) {
235 s
->watchdog_event_source
= sd_event_source_disable_unref(s
->watchdog_event_source
);
236 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
239 static void service_start_watchdog(Service
*s
) {
240 usec_t watchdog_usec
;
245 watchdog_usec
= service_get_watchdog_usec(s
);
246 if (!timestamp_is_set(watchdog_usec
)) {
247 service_stop_watchdog(s
);
251 if (s
->watchdog_event_source
) {
252 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
254 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
258 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
260 r
= sd_event_add_time(
261 UNIT(s
)->manager
->event
,
262 &s
->watchdog_event_source
,
264 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
265 service_dispatch_watchdog
, s
);
267 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
271 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
273 /* Let's process everything else which might be a sign
274 * of living before we consider a service died. */
275 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
278 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
281 usec_t
service_restart_usec_next(Service
*s
) {
282 unsigned n_restarts_next
;
287 /* When the service state is in SERVICE_*_BEFORE_AUTO_RESTART or SERVICE_AUTO_RESTART,
288 * we still need to add 1 to s->n_restarts manually because s->n_restarts is not updated
289 * until a restart job is enqueued. Note that for SERVICE_AUTO_RESTART, that might have been
290 * the case, i.e. s->n_restarts is already increased. But we assume it's not since the time
291 * between job enqueuing and running is usually neglectable compared to the time we'll be sleeping. */
292 n_restarts_next
= s
->n_restarts
+ 1;
294 if (n_restarts_next
<= 1 ||
295 s
->restart_steps
== 0 ||
296 s
->restart_max_delay_usec
== USEC_INFINITY
||
297 s
->restart_usec
>= s
->restart_max_delay_usec
)
298 value
= s
->restart_usec
;
299 else if (n_restarts_next
> s
->restart_steps
)
300 value
= s
->restart_max_delay_usec
;
302 /* Enforced in service_verify() and above */
303 assert(s
->restart_max_delay_usec
> s
->restart_usec
);
305 /* ((restart_usec_max - restart_usec)^(1/restart_steps))^(n_restart_next - 1) */
306 value
= usec_add(s
->restart_usec
,
307 (usec_t
) powl(s
->restart_max_delay_usec
- s
->restart_usec
,
308 (long double) (n_restarts_next
- 1) / s
->restart_steps
));
311 log_unit_debug(UNIT(s
), "Next restart interval calculated as: %s", FORMAT_TIMESPAN(value
, 0));
315 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
321 /* Extends the specified event source timer to at least the specified time, unless it is already later
327 r
= sd_event_source_get_time(source
, ¤t
);
330 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
331 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
335 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
338 r
= sd_event_source_set_time(source
, extended
);
341 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
342 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for event source '%s', ignoring %m", strna(desc
));
346 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
351 if (!timestamp_is_set(extend_timeout_usec
))
354 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
356 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
357 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
360 static void service_reset_watchdog(Service
*s
) {
363 dual_timestamp_get(&s
->watchdog_timestamp
);
364 service_start_watchdog(s
);
367 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
370 s
->watchdog_override_enable
= true;
371 s
->watchdog_override_usec
= watchdog_override_usec
;
372 service_reset_watchdog(s
);
374 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
375 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
378 static ServiceFDStore
* service_fd_store_unlink(ServiceFDStore
*fs
) {
383 assert(fs
->service
->n_fd_store
> 0);
384 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
385 fs
->service
->n_fd_store
--;
388 sd_event_source_disable_unref(fs
->event_source
);
391 asynchronous_close(fs
->fd
);
395 DEFINE_TRIVIAL_CLEANUP_FUNC(ServiceFDStore
*, service_fd_store_unlink
);
397 static void service_release_fd_store(Service
*s
) {
403 log_unit_debug(UNIT(s
), "Releasing all stored fds");
406 service_fd_store_unlink(s
->fd_store
);
408 assert(s
->n_fd_store
== 0);
411 static void service_release_stdio_fd(Service
*s
) {
414 if (s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stdout_fd
< 0)
417 log_unit_debug(UNIT(s
), "Releasing stdin/stdout/stderr file descriptors.");
419 s
->stdin_fd
= asynchronous_close(s
->stdin_fd
);
420 s
->stdout_fd
= asynchronous_close(s
->stdout_fd
);
421 s
->stderr_fd
= asynchronous_close(s
->stderr_fd
);
423 static void service_done(Unit
*u
) {
424 Service
*s
= SERVICE(u
);
428 open_file_free_many(&s
->open_files
);
430 s
->pid_file
= mfree(s
->pid_file
);
431 s
->status_text
= mfree(s
->status_text
);
433 s
->exec_runtime
= exec_runtime_free(s
->exec_runtime
);
434 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
435 s
->control_command
= NULL
;
436 s
->main_command
= NULL
;
438 exit_status_set_free(&s
->restart_prevent_status
);
439 exit_status_set_free(&s
->restart_force_status
);
440 exit_status_set_free(&s
->success_status
);
442 /* This will leak a process, but at least no memory or any of
444 service_unwatch_main_pid(s
);
445 service_unwatch_control_pid(s
);
446 service_unwatch_pid_file(s
);
449 unit_unwatch_bus_name(u
, s
->bus_name
);
450 s
->bus_name
= mfree(s
->bus_name
);
453 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
455 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
456 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
458 service_stop_watchdog(s
);
460 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
461 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
463 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
465 service_release_socket_fd(s
);
466 service_release_stdio_fd(s
);
467 service_release_fd_store(s
);
470 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
471 ServiceFDStore
*fs
= ASSERT_PTR(userdata
);
475 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
476 log_unit_debug(UNIT(fs
->service
),
477 "Received %s on stored fd %d (%s), closing.",
478 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
479 fs
->fd
, strna(fs
->fdname
));
480 service_fd_store_unlink(fs
);
484 static int service_add_fd_store(Service
*s
, int fd_in
, const char *name
, bool do_poll
) {
485 _cleanup_(service_fd_store_unlinkp
) ServiceFDStore
*fs
= NULL
;
486 _cleanup_(asynchronous_closep
) int fd
= ASSERT_FD(fd_in
);
490 /* fd is always consumed even if the function fails. */
494 if (fstat(fd
, &st
) < 0)
497 log_unit_debug(UNIT(s
), "Trying to stash fd for dev=" DEVNUM_FORMAT_STR
"/inode=%" PRIu64
, DEVNUM_FORMAT_VAL(st
.st_dev
), (uint64_t) st
.st_ino
);
499 if (s
->n_fd_store
>= s
->n_fd_store_max
)
500 /* Our store is full. Use this errno rather than E[NM]FILE to distinguish from the case
501 * where systemd itself hits the file limit. */
502 return log_unit_debug_errno(UNIT(s
), SYNTHETIC_ERRNO(EXFULL
), "Hit fd store limit.");
504 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
505 r
= same_fd(i
->fd
, fd
);
509 log_unit_debug(UNIT(s
), "Suppressing duplicate fd %i in fd store.", fd
);
510 return 0; /* fd already included */
514 fs
= new(ServiceFDStore
, 1);
518 *fs
= (ServiceFDStore
) {
521 .fdname
= strdup(name
?: "stored"),
528 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fs
->fd
, 0, on_fd_store_io
, fs
);
529 if (r
< 0 && r
!= -EPERM
) /* EPERM indicates fds that aren't pollable, which is OK */
532 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
536 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
539 log_unit_debug(UNIT(s
), "Added fd %i (%s) to fd store.", fs
->fd
, fs
->fdname
);
542 return 1; /* fd newly stored */
545 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
553 fd
= fdset_steal_first(fds
);
557 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
559 return log_unit_warning_errno(UNIT(s
), r
,
560 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
563 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
569 static void service_remove_fd_store(Service
*s
, const char *name
) {
573 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
574 if (!streq(fs
->fdname
, name
))
577 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
578 service_fd_store_unlink(fs
);
582 static usec_t
service_running_timeout(Service
*s
) {
587 if (s
->runtime_rand_extra_usec
!= 0) {
588 delta
= random_u64_range(s
->runtime_rand_extra_usec
);
589 log_unit_debug(UNIT(s
), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta
, USEC_PER_SEC
));
592 return usec_add(usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
,
593 s
->runtime_max_usec
),
597 static int service_arm_timer(Service
*s
, bool relative
, usec_t usec
) {
602 if (s
->timer_event_source
) {
603 r
= (relative
? sd_event_source_set_time_relative
: sd_event_source_set_time
)(s
->timer_event_source
, usec
);
607 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
610 if (usec
== USEC_INFINITY
)
613 r
= (relative
? sd_event_add_time_relative
: sd_event_add_time
)(
614 UNIT(s
)->manager
->event
,
615 &s
->timer_event_source
,
618 service_dispatch_timer
, s
);
622 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
627 static int service_verify(Service
*s
) {
629 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
631 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++)
632 LIST_FOREACH(command
, command
, s
->exec_command
[c
]) {
633 if (!path_is_absolute(command
->path
) && !filename_is_valid(command
->path
))
634 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
635 "Service %s= binary path \"%s\" is neither a valid executable name nor an absolute path. Refusing.",
637 service_exec_command_to_string(c
));
638 if (strv_isempty(command
->argv
))
639 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
640 "Service has an empty argv in %s=. Refusing.",
641 service_exec_command_to_string(c
));
644 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
] &&
645 UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
646 /* FailureAction= only makes sense if one of the start or stop commands is specified.
647 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
648 * either a command or SuccessAction= are required. */
650 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
652 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
])
653 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
655 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
656 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.");
658 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
)
659 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.");
661 if (s
->type
== SERVICE_ONESHOT
&&
662 !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
))
663 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.");
665 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
))
666 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has RestartForceExitStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
668 if (s
->type
== SERVICE_ONESHOT
&& s
->exit_type
== SERVICE_EXIT_CGROUP
)
669 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has ExitType=cgroup set, which isn't allowed for Type=oneshot services. Refusing.");
671 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
)
672 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.");
674 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
))
675 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.");
677 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
678 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
680 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
681 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
683 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
684 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
686 if (s
->runtime_max_usec
== USEC_INFINITY
&& s
->runtime_rand_extra_usec
!= 0)
687 log_unit_warning(UNIT(s
), "Service has RuntimeRandomizedExtraSec= setting, but no RuntimeMaxSec=. Ignoring.");
689 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& cg_unified() < CGROUP_UNIFIED_SYSTEMD
)
690 log_unit_warning(UNIT(s
), "Service has ExitType=cgroup set, but we are running with legacy cgroups v1, which might not work correctly. Continuing.");
692 if (s
->restart_max_delay_usec
== USEC_INFINITY
&& s
->restart_steps
> 0)
693 log_unit_warning(UNIT(s
), "Service has RestartSteps= but no RestartMaxDelaySec= setting. Ignoring.");
695 if (s
->restart_max_delay_usec
!= USEC_INFINITY
&& s
->restart_steps
== 0)
696 log_unit_warning(UNIT(s
), "Service has RestartMaxDelaySec= but no RestartSteps= setting. Ignoring.");
698 if (s
->restart_max_delay_usec
< s
->restart_usec
) {
699 log_unit_warning(UNIT(s
), "RestartMaxDelaySec= has a value smaller than RestartSec=, resetting RestartSec= to RestartMaxDelaySec=.");
700 s
->restart_usec
= s
->restart_max_delay_usec
;
706 static int service_add_default_dependencies(Service
*s
) {
711 if (!UNIT(s
)->default_dependencies
)
714 /* Add a number of automatic dependencies useful for the
715 * majority of services. */
717 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
718 /* First, pull in the really early boot stuff, and
719 * require it, so that we fail if we can't acquire
722 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
727 /* In the --user instance there's no sysinit.target,
728 * in that case require basic.target instead. */
730 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
735 /* Second, if the rest of the base system is in the same
736 * transaction, order us after it, but do not pull it in or
737 * even require it. */
738 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
742 /* Third, add us in for normal shutdown. */
743 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
747 /* Fourth, add generic dependencies */
748 return exec_context_add_default_dependencies(UNIT(s
), &s
->exec_context
);
751 static void service_fix_stdio(Service
*s
) {
754 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
755 * default value that is subject to automatic overriding triggered by other settings and an explicit
756 * choice the user can make. We don't distinguish between these cases currently. */
758 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
759 s
->exec_context
.stdin_data_size
> 0)
760 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
762 if (IN_SET(s
->exec_context
.std_input
,
764 EXEC_INPUT_TTY_FORCE
,
767 EXEC_INPUT_NAMED_FD
))
770 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
771 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
772 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
773 * duplicated for both input and output at the same time (since they then would cause a feedback
774 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
776 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
777 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
778 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
780 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
781 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
784 static int service_setup_bus_name(Service
*s
) {
789 /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */
793 if (s
->type
== SERVICE_DBUS
) {
794 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
796 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
798 /* We always want to be ordered against dbus.socket if both are in the transaction. */
799 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
801 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
804 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
806 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
808 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
813 static int service_add_extras(Service
*s
) {
818 if (s
->type
== _SERVICE_TYPE_INVALID
) {
819 /* Figure out a type automatically */
821 s
->type
= SERVICE_DBUS
;
822 else if (s
->exec_command
[SERVICE_EXEC_START
])
823 s
->type
= SERVICE_SIMPLE
;
825 s
->type
= SERVICE_ONESHOT
;
828 /* Oneshot services have disabled start timeout by default */
829 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
830 s
->timeout_start_usec
= USEC_INFINITY
;
832 service_fix_stdio(s
);
834 r
= unit_patch_contexts(UNIT(s
));
838 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
842 r
= unit_set_default_slice(UNIT(s
));
846 /* If the service needs the notify socket, let's enable it automatically. */
847 if (s
->notify_access
== NOTIFY_NONE
&&
848 (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) || s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
849 s
->notify_access
= NOTIFY_MAIN
;
851 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
852 * delegation is on, in that case it we assume the payload knows better what to do and can process
853 * things in a more focused way. */
854 if (s
->oom_policy
< 0)
855 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
857 /* Let the kernel do the killing if that's requested. */
858 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
860 r
= service_add_default_dependencies(s
);
864 r
= service_setup_bus_name(s
);
871 static int service_load(Unit
*u
) {
872 Service
*s
= SERVICE(u
);
875 r
= unit_load_fragment_and_dropin(u
, true);
879 if (u
->load_state
!= UNIT_LOADED
)
882 /* This is a new unit? Then let's add in some extras */
883 r
= service_add_extras(s
);
887 return service_verify(s
);
890 static void service_dump_fdstore(Service
*s
, FILE *f
, const char *prefix
) {
895 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
896 _cleanup_free_
char *path
= NULL
;
900 if (fstat(i
->fd
, &st
) < 0) {
901 log_debug_errno(errno
, "Failed to stat fdstore entry: %m");
905 flags
= fcntl(i
->fd
, F_GETFL
);
907 log_debug_errno(errno
, "Failed to get fdstore entry flags: %m");
911 (void) fd_get_path(i
->fd
, &path
);
914 "%s%s '%s' (type=%s; dev=" DEVNUM_FORMAT_STR
"; inode=%" PRIu64
"; rdev=" DEVNUM_FORMAT_STR
"; path=%s; access=%s)\n",
915 prefix
, i
== s
->fd_store
? "File Descriptor Store Entry:" : " ",
917 inode_type_to_string(st
.st_mode
),
918 DEVNUM_FORMAT_VAL(st
.st_dev
),
919 (uint64_t) st
.st_ino
,
920 DEVNUM_FORMAT_VAL(st
.st_rdev
),
922 accmode_to_string(flags
));
926 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
927 Service
*s
= SERVICE(u
);
932 prefix
= strempty(prefix
);
933 prefix2
= strjoina(prefix
, "\t");
936 "%sService State: %s\n"
938 "%sReload Result: %s\n"
939 "%sClean Result: %s\n"
940 "%sPermissionsStartOnly: %s\n"
941 "%sRootDirectoryStartOnly: %s\n"
942 "%sRemainAfterExit: %s\n"
943 "%sGuessMainPID: %s\n"
946 "%sNotifyAccess: %s\n"
947 "%sNotifyState: %s\n"
949 "%sReloadSignal: %s\n",
950 prefix
, service_state_to_string(s
->state
),
951 prefix
, service_result_to_string(s
->result
),
952 prefix
, service_result_to_string(s
->reload_result
),
953 prefix
, service_result_to_string(s
->clean_result
),
954 prefix
, yes_no(s
->permissions_start_only
),
955 prefix
, yes_no(s
->root_directory_start_only
),
956 prefix
, yes_no(s
->remain_after_exit
),
957 prefix
, yes_no(s
->guess_main_pid
),
958 prefix
, service_type_to_string(s
->type
),
959 prefix
, service_restart_to_string(s
->restart
),
960 prefix
, notify_access_to_string(service_get_notify_access(s
)),
961 prefix
, notify_state_to_string(s
->notify_state
),
962 prefix
, oom_policy_to_string(s
->oom_policy
),
963 prefix
, signal_to_string(s
->reload_signal
));
965 if (s
->control_pid
> 0)
967 "%sControl PID: "PID_FMT
"\n",
968 prefix
, s
->control_pid
);
972 "%sMain PID: "PID_FMT
"\n"
973 "%sMain PID Known: %s\n"
974 "%sMain PID Alien: %s\n",
976 prefix
, yes_no(s
->main_pid_known
),
977 prefix
, yes_no(s
->main_pid_alien
));
982 prefix
, s
->pid_file
);
987 "%sBus Name Good: %s\n",
989 prefix
, yes_no(s
->bus_name_good
));
991 if (UNIT_ISSET(s
->accept_socket
))
993 "%sAccept Socket: %s\n",
994 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
998 "%sRestartSteps: %u\n"
999 "%sRestartMaxDelaySec: %s\n"
1000 "%sTimeoutStartSec: %s\n"
1001 "%sTimeoutStopSec: %s\n"
1002 "%sTimeoutStartFailureMode: %s\n"
1003 "%sTimeoutStopFailureMode: %s\n",
1004 prefix
, FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
),
1005 prefix
, s
->restart_steps
,
1006 prefix
, FORMAT_TIMESPAN(s
->restart_max_delay_usec
, USEC_PER_SEC
),
1007 prefix
, FORMAT_TIMESPAN(s
->timeout_start_usec
, USEC_PER_SEC
),
1008 prefix
, FORMAT_TIMESPAN(s
->timeout_stop_usec
, USEC_PER_SEC
),
1009 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
1010 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
1012 if (s
->timeout_abort_set
)
1014 "%sTimeoutAbortSec: %s\n",
1015 prefix
, FORMAT_TIMESPAN(s
->timeout_abort_usec
, USEC_PER_SEC
));
1018 "%sRuntimeMaxSec: %s\n"
1019 "%sRuntimeRandomizedExtraSec: %s\n"
1020 "%sWatchdogSec: %s\n",
1021 prefix
, FORMAT_TIMESPAN(s
->runtime_max_usec
, USEC_PER_SEC
),
1022 prefix
, FORMAT_TIMESPAN(s
->runtime_rand_extra_usec
, USEC_PER_SEC
),
1023 prefix
, FORMAT_TIMESPAN(s
->watchdog_usec
, USEC_PER_SEC
));
1025 kill_context_dump(&s
->kill_context
, f
, prefix
);
1026 exec_context_dump(&s
->exec_context
, f
, prefix
);
1028 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
1029 if (!s
->exec_command
[c
])
1032 fprintf(f
, "%s-> %s:\n",
1033 prefix
, service_exec_command_to_string(c
));
1035 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
1039 fprintf(f
, "%sStatus Text: %s\n",
1040 prefix
, s
->status_text
);
1042 if (s
->n_fd_store_max
> 0)
1044 "%sFile Descriptor Store Max: %u\n"
1045 "%sFile Descriptor Store Pin: %s\n"
1046 "%sFile Descriptor Store Current: %zu\n",
1047 prefix
, s
->n_fd_store_max
,
1048 prefix
, exec_preserve_mode_to_string(s
->fd_store_preserve_mode
),
1049 prefix
, s
->n_fd_store
);
1051 service_dump_fdstore(s
, f
, prefix
);
1054 LIST_FOREACH(open_files
, of
, s
->open_files
) {
1055 _cleanup_free_
char *ofs
= NULL
;
1058 r
= open_file_to_string(of
, &ofs
);
1061 "Failed to convert OpenFile= setting to string, ignoring: %m");
1065 fprintf(f
, "%sOpen File: %s\n", prefix
, ofs
);
1068 cgroup_context_dump(UNIT(s
), f
, prefix
);
1071 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
1075 assert(pid_is_valid(pid
));
1077 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
1078 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
1081 if (pid
== getpid_cached() || pid
== 1)
1082 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
1084 if (pid
== s
->control_pid
)
1085 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
1087 if (!pid_is_alive(pid
))
1088 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
1090 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
1091 if (owner
== UNIT(s
)) {
1092 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
1093 return 1; /* Yay, it's definitely a good PID */
1096 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
1099 static int service_load_pid_file(Service
*s
, bool may_warn
) {
1100 bool questionable_pid_file
= false;
1101 _cleanup_free_
char *k
= NULL
;
1102 _cleanup_close_
int fd
= -EBADF
;
1111 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
1113 r
= chase(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
1114 if (r
== -ENOLINK
) {
1115 log_unit_debug_errno(UNIT(s
), r
,
1116 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
1118 questionable_pid_file
= true;
1120 r
= chase(s
->pid_file
, NULL
, 0, NULL
, &fd
);
1123 return log_unit_full_errno(UNIT(s
), prio
, r
,
1124 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
1126 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
1127 * chase() returned us into a proper fd first. */
1128 r
= read_one_line_file(FORMAT_PROC_FD_PATH(fd
), &k
);
1130 return log_unit_error_errno(UNIT(s
), r
,
1131 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
1134 r
= parse_pid(k
, &pid
);
1136 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
1138 if (s
->main_pid_known
&& pid
== s
->main_pid
)
1141 r
= service_is_suitable_main_pid(s
, pid
, prio
);
1147 if (questionable_pid_file
)
1148 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1149 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1151 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1153 if (fstat(fd
, &st
) < 0)
1154 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1157 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1158 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
1160 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
);
1163 if (s
->main_pid_known
) {
1164 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1166 service_unwatch_main_pid(s
);
1167 s
->main_pid_known
= false;
1169 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1171 r
= service_set_main_pid(s
, pid
);
1175 r
= unit_watch_pid(UNIT(s
), pid
, false);
1176 if (r
< 0) /* FIXME: we need to do something here */
1177 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1182 static void service_search_main_pid(Service
*s
) {
1188 /* If we know it anyway, don't ever fall back to unreliable
1190 if (s
->main_pid_known
)
1193 if (!s
->guess_main_pid
)
1196 assert(s
->main_pid
<= 0);
1198 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1201 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1202 if (service_set_main_pid(s
, pid
) < 0)
1205 r
= unit_watch_pid(UNIT(s
), pid
, false);
1207 /* FIXME: we need to do something here */
1208 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1211 static void service_set_state(Service
*s
, ServiceState state
) {
1212 ServiceState old_state
;
1213 const UnitActiveState
*table
;
1217 if (s
->state
!= state
)
1218 bus_unit_send_pending_change_signal(UNIT(s
), false);
1220 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1222 old_state
= s
->state
;
1225 service_unwatch_pid_file(s
);
1228 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1230 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1231 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1232 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1233 SERVICE_AUTO_RESTART
,
1235 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1238 SERVICE_START
, SERVICE_START_POST
,
1240 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1241 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1242 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1243 service_unwatch_main_pid(s
);
1244 s
->main_command
= NULL
;
1248 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1249 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1250 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1251 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1252 SERVICE_CLEANING
)) {
1253 service_unwatch_control_pid(s
);
1254 s
->control_command
= NULL
;
1255 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1259 SERVICE_DEAD
, SERVICE_FAILED
,
1260 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
,
1261 SERVICE_DEAD_RESOURCES_PINNED
)) {
1262 unit_unwatch_all_pids(UNIT(s
));
1263 unit_dequeue_rewatch_pids(UNIT(s
));
1266 if (state
!= SERVICE_START
)
1267 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
1269 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1270 service_stop_watchdog(s
);
1272 /* For the inactive states unit_notify() will trim the cgroup,
1273 * but for exit we have to do that ourselves... */
1274 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1275 unit_prune_cgroup(UNIT(s
));
1277 if (old_state
!= state
)
1278 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1280 unit_notify(UNIT(s
), table
[old_state
], table
[state
], s
->reload_result
== SERVICE_SUCCESS
);
1283 static usec_t
service_coldplug_timeout(Service
*s
) {
1286 switch (s
->deserialized_state
) {
1288 case SERVICE_CONDITION
:
1289 case SERVICE_START_PRE
:
1291 case SERVICE_START_POST
:
1292 case SERVICE_RELOAD
:
1293 case SERVICE_RELOAD_SIGNAL
:
1294 case SERVICE_RELOAD_NOTIFY
:
1295 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1297 case SERVICE_RUNNING
:
1298 return service_running_timeout(s
);
1301 case SERVICE_STOP_SIGTERM
:
1302 case SERVICE_STOP_SIGKILL
:
1303 case SERVICE_STOP_POST
:
1304 case SERVICE_FINAL_SIGTERM
:
1305 case SERVICE_FINAL_SIGKILL
:
1306 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1308 case SERVICE_STOP_WATCHDOG
:
1309 case SERVICE_FINAL_WATCHDOG
:
1310 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1312 case SERVICE_AUTO_RESTART
:
1313 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, service_restart_usec_next(s
));
1315 case SERVICE_CLEANING
:
1316 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1319 return USEC_INFINITY
;
1323 static int service_coldplug(Unit
*u
) {
1324 Service
*s
= SERVICE(u
);
1328 assert(s
->state
== SERVICE_DEAD
);
1330 if (s
->deserialized_state
== s
->state
)
1333 r
= service_arm_timer(s
, /* relative= */ false, service_coldplug_timeout(s
));
1337 if (s
->main_pid
> 0 &&
1338 pid_is_unwaited(s
->main_pid
) &&
1339 (IN_SET(s
->deserialized_state
,
1340 SERVICE_START
, SERVICE_START_POST
,
1342 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1343 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1344 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1345 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1350 if (s
->control_pid
> 0 &&
1351 pid_is_unwaited(s
->control_pid
) &&
1352 IN_SET(s
->deserialized_state
,
1353 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1354 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1355 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1356 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1357 SERVICE_CLEANING
)) {
1358 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1363 if (!IN_SET(s
->deserialized_state
,
1364 SERVICE_DEAD
, SERVICE_FAILED
,
1365 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
,
1367 SERVICE_DEAD_RESOURCES_PINNED
)) {
1368 (void) unit_enqueue_rewatch_pids(u
);
1369 (void) unit_setup_exec_runtime(u
);
1372 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1373 service_start_watchdog(s
);
1375 if (UNIT_ISSET(s
->accept_socket
)) {
1376 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1378 if (socket
->max_connections_per_source
> 0) {
1381 /* Make a best-effort attempt at bumping the connection count */
1382 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1383 socket_peer_unref(s
->socket_peer
);
1384 s
->socket_peer
= peer
;
1389 service_set_state(s
, s
->deserialized_state
);
1393 static int service_collect_fds(
1397 size_t *n_socket_fds
,
1398 size_t *n_storage_fds
) {
1400 _cleanup_strv_free_
char **rfd_names
= NULL
;
1401 _cleanup_free_
int *rfds
= NULL
;
1402 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1408 assert(n_socket_fds
);
1409 assert(n_storage_fds
);
1411 if (s
->socket_fd
>= 0) {
1413 /* Pass the per-connection socket */
1415 rfds
= newdup(int, &s
->socket_fd
, 1);
1419 rfd_names
= strv_new("connection");
1427 /* Pass all our configured sockets for singleton services */
1429 UNIT_FOREACH_DEPENDENCY(u
, UNIT(s
), UNIT_ATOM_TRIGGERED_BY
) {
1430 _cleanup_free_
int *cfds
= NULL
;
1434 if (u
->type
!= UNIT_SOCKET
)
1439 cn_fds
= socket_collect_fds(sock
, &cfds
);
1447 rfds
= TAKE_PTR(cfds
);
1448 rn_socket_fds
= cn_fds
;
1452 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1456 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1459 rn_socket_fds
+= cn_fds
;
1462 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1468 if (s
->n_fd_store
> 0) {
1473 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1479 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1484 n_fds
= rn_socket_fds
;
1486 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1487 rfds
[n_fds
] = fs
->fd
;
1488 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1489 if (!rfd_names
[n_fds
])
1496 rfd_names
[n_fds
] = NULL
;
1499 *fds
= TAKE_PTR(rfds
);
1500 *fd_names
= TAKE_PTR(rfd_names
);
1501 *n_socket_fds
= rn_socket_fds
;
1502 *n_storage_fds
= rn_storage_fds
;
1507 static int service_allocate_exec_fd_event_source(
1510 sd_event_source
**ret_event_source
) {
1512 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1517 assert(ret_event_source
);
1519 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1521 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1523 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1525 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1527 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1529 (void) sd_event_source_set_description(source
, "service exec_fd");
1531 r
= sd_event_source_set_io_fd_own(source
, true);
1533 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1535 *ret_event_source
= TAKE_PTR(source
);
1539 static int service_allocate_exec_fd(
1541 sd_event_source
**ret_event_source
,
1544 _cleanup_close_pair_
int p
[] = PIPE_EBADF
;
1548 assert(ret_event_source
);
1549 assert(ret_exec_fd
);
1551 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1552 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1554 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1559 *ret_exec_fd
= TAKE_FD(p
[1]);
1564 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1567 /* Notifications are accepted depending on the process and
1568 * the access setting of the service:
1569 * process: \ access: NONE MAIN EXEC ALL
1570 * main no yes yes yes
1571 * control no no yes yes
1572 * other (forked) no no no yes */
1574 if (flags
& EXEC_IS_CONTROL
)
1575 /* A control process */
1576 return IN_SET(service_get_notify_access(s
), NOTIFY_EXEC
, NOTIFY_ALL
);
1578 /* We only spawn main processes and control processes, so any
1579 * process that is not a control process is a main process */
1580 return service_get_notify_access(s
) != NOTIFY_NONE
;
1583 static Service
*service_get_triggering_service(Service
*s
) {
1584 Unit
*candidate
= NULL
, *other
;
1588 /* Return the service which triggered service 's', this means dependency
1589 * types which include the UNIT_ATOM_ON_{FAILURE,SUCCESS}_OF atoms.
1591 * N.B. if there are multiple services which could trigger 's' via OnFailure=
1592 * or OnSuccess= then we return NULL. This is since we don't know from which
1593 * one to propagate the exit status. */
1595 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_FAILURE_OF
) {
1601 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_SUCCESS_OF
) {
1607 return SERVICE(candidate
);
1610 log_unit_warning(UNIT(s
), "multiple trigger source candidates for exit status propagation (%s, %s), skipping.",
1611 candidate
->id
, other
->id
);
1615 static int service_spawn_internal(
1623 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1626 .stdout_fd
= -EBADF
,
1627 .stderr_fd
= -EBADF
,
1630 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1631 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1641 log_unit_debug(UNIT(s
), "Will spawn child (%s): %s", caller
, c
->path
);
1643 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1647 assert(!s
->exec_fd_event_source
);
1649 if (flags
& EXEC_IS_CONTROL
) {
1650 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1651 if (s
->permissions_start_only
)
1652 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1653 if (s
->root_directory_start_only
)
1654 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1657 if ((flags
& EXEC_PASS_FDS
) ||
1658 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1659 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1660 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1662 r
= service_collect_fds(s
,
1664 &exec_params
.fd_names
,
1665 &exec_params
.n_socket_fds
,
1666 &exec_params
.n_storage_fds
);
1670 exec_params
.open_files
= s
->open_files
;
1672 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1675 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1676 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1681 r
= service_arm_timer(s
, /* relative= */ true, timeout
);
1685 our_env
= new0(char*, 13);
1689 if (service_exec_needs_notify_socket(s
, flags
)) {
1690 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1693 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1695 if (s
->n_fd_store_max
> 0)
1696 if (asprintf(our_env
+ n_env
++, "FDSTORE=%u", s
->n_fd_store_max
) < 0)
1700 if (s
->main_pid
> 0)
1701 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1704 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1705 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1709 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1712 if (s
->socket_fd
>= 0) {
1713 union sockaddr_union sa
;
1714 socklen_t salen
= sizeof(sa
);
1716 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1717 * useful. Note that we do this only when we are still connected at this point in time, which we might
1718 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1719 * in ENOTCONN), and just use whate we can use. */
1721 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1722 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1723 _cleanup_free_
char *addr
= NULL
;
1727 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1731 t
= strjoin("REMOTE_ADDR=", addr
);
1734 our_env
[n_env
++] = t
;
1736 r
= sockaddr_port(&sa
.sa
, &port
);
1740 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1742 our_env
[n_env
++] = t
;
1746 Service
*env_source
= NULL
;
1747 const char *monitor_prefix
;
1748 if (flags
& EXEC_SETENV_RESULT
) {
1750 monitor_prefix
= "";
1751 } else if (flags
& EXEC_SETENV_MONITOR_RESULT
) {
1752 env_source
= service_get_triggering_service(s
);
1753 monitor_prefix
= "MONITOR_";
1757 if (asprintf(our_env
+ n_env
++, "%sSERVICE_RESULT=%s", monitor_prefix
, service_result_to_string(env_source
->result
)) < 0)
1760 if (env_source
->main_exec_status
.pid
> 0 &&
1761 dual_timestamp_is_set(&env_source
->main_exec_status
.exit_timestamp
)) {
1762 if (asprintf(our_env
+ n_env
++, "%sEXIT_CODE=%s", monitor_prefix
, sigchld_code_to_string(env_source
->main_exec_status
.code
)) < 0)
1765 if (env_source
->main_exec_status
.code
== CLD_EXITED
)
1766 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%i", monitor_prefix
, env_source
->main_exec_status
.status
);
1768 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%s", monitor_prefix
, signal_to_string(env_source
->main_exec_status
.status
));
1774 if (env_source
!= s
) {
1775 if (!sd_id128_is_null(UNIT(env_source
)->invocation_id
)) {
1776 r
= asprintf(our_env
+ n_env
++, "%sINVOCATION_ID=" SD_ID128_FORMAT_STR
,
1777 monitor_prefix
, SD_ID128_FORMAT_VAL(UNIT(env_source
)->invocation_id
));
1782 if (asprintf(our_env
+ n_env
++, "%sUNIT=%s", monitor_prefix
, UNIT(env_source
)->id
) < 0)
1787 if (UNIT(s
)->activation_details
) {
1788 r
= activation_details_append_env(UNIT(s
)->activation_details
, &our_env
);
1791 /* The number of env vars added here can vary, rather than keeping the allocation block in
1792 * sync manually, these functions simply use the strv methods to append to it, so we need
1793 * to update n_env when we are done in case of future usage. */
1797 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1801 final_env
= strv_env_merge(exec_params
.environment
, our_env
);
1805 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1806 SET_FLAG(exec_params
.flags
, EXEC_NSS_DYNAMIC_BYPASS
,
1807 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1809 strv_free_and_replace(exec_params
.environment
, final_env
);
1810 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1811 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1812 if (s
->type
== SERVICE_IDLE
)
1813 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1814 exec_params
.stdin_fd
= s
->stdin_fd
;
1815 exec_params
.stdout_fd
= s
->stdout_fd
;
1816 exec_params
.stderr_fd
= s
->stderr_fd
;
1818 r
= exec_spawn(UNIT(s
),
1828 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1829 s
->exec_fd_hot
= false;
1831 r
= unit_watch_pid(UNIT(s
), pid
, true);
1840 static int main_pid_good(Service
*s
) {
1843 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1845 /* If we know the pid file, then let's just check if it is
1847 if (s
->main_pid_known
) {
1849 /* If it's an alien child let's check if it is still
1851 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1852 return pid_is_alive(s
->main_pid
);
1854 /* .. otherwise assume we'll get a SIGCHLD for it,
1855 * which we really should wait for to collect exit
1856 * status and code */
1857 return s
->main_pid
> 0;
1860 /* We don't know the pid */
1864 static int control_pid_good(Service
*s
) {
1867 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1868 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1869 * means: we can't figure it out. */
1871 return s
->control_pid
> 0;
1874 static int cgroup_good(Service
*s
) {
1879 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1882 if (!UNIT(s
)->cgroup_path
)
1885 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1892 static bool service_shall_restart(Service
*s
, const char **reason
) {
1895 /* Don't restart after manual stops */
1896 if (s
->forbid_restart
) {
1897 *reason
= "manual stop";
1901 /* Never restart if this is configured as special exception */
1902 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1903 *reason
= "prevented by exit status";
1907 /* Restart if the exit code/status are configured as restart triggers */
1908 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1909 *reason
= "forced by exit status";
1913 *reason
= "restart setting";
1914 switch (s
->restart
) {
1916 case SERVICE_RESTART_NO
:
1919 case SERVICE_RESTART_ALWAYS
:
1920 return s
->result
!= SERVICE_SKIP_CONDITION
;
1922 case SERVICE_RESTART_ON_SUCCESS
:
1923 return s
->result
== SERVICE_SUCCESS
;
1925 case SERVICE_RESTART_ON_FAILURE
:
1926 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1928 case SERVICE_RESTART_ON_ABNORMAL
:
1929 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1931 case SERVICE_RESTART_ON_WATCHDOG
:
1932 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1934 case SERVICE_RESTART_ON_ABORT
:
1935 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1938 assert_not_reached();
1942 static bool service_will_restart(Unit
*u
) {
1943 Service
*s
= SERVICE(u
);
1947 if (IN_SET(s
->state
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
))
1950 return unit_will_restart_default(u
);
1953 static ServiceState
service_determine_dead_state(Service
*s
) {
1956 return s
->fd_store
&& s
->fd_store_preserve_mode
== EXEC_PRESERVE_YES
? SERVICE_DEAD_RESOURCES_PINNED
: SERVICE_DEAD
;
1959 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1960 ServiceState end_state
, restart_state
;
1965 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1966 * undo what has already been enqueued. */
1967 if (unit_stop_pending(UNIT(s
)))
1968 allow_restart
= false;
1970 if (s
->result
== SERVICE_SUCCESS
)
1973 if (s
->result
== SERVICE_SUCCESS
) {
1974 unit_log_success(UNIT(s
));
1975 end_state
= service_determine_dead_state(s
);
1976 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1977 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1978 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1979 end_state
= service_determine_dead_state(s
);
1980 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
1982 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1983 end_state
= SERVICE_FAILED
;
1984 restart_state
= SERVICE_FAILED_BEFORE_AUTO_RESTART
;
1986 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1989 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1993 allow_restart
= service_shall_restart(s
, &reason
);
1994 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1995 allow_restart
? "" : "not ",
1999 if (allow_restart
) {
2000 /* We make two state changes here: one that maps to the high-level UNIT_INACTIVE/UNIT_FAILED
2001 * state (i.e. a state indicating deactivation), and then one that that maps to the
2002 * high-level UNIT_STARTING state (i.e. a state indicating activation). We do this so that
2003 * external software can watch the state changes and see all service failures, even if they
2004 * are only transitionary and followed by an automatic restart. We have fine-grained
2005 * low-level states for this though so that software can distinguish the permanent UNIT_INACTIVE
2006 * state from this transitionary UNIT_INACTIVE state by looking at the low-level states. */
2007 service_set_state(s
, restart_state
);
2009 r
= service_arm_timer(s
, /* relative= */ true, service_restart_usec_next(s
));
2013 service_set_state(s
, SERVICE_AUTO_RESTART
);
2015 service_set_state(s
, end_state
);
2017 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
2018 * user can still introspect the counter. Do so on the next start. */
2019 s
->flush_n_restarts
= true;
2022 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
2023 * queue, so that the fd store is possibly gc'ed again */
2024 unit_add_to_gc_queue(UNIT(s
));
2026 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
2027 s
->forbid_restart
= false;
2029 /* Reset NotifyAccess override */
2030 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2032 /* We want fresh tmpdirs and ephemeral snapshots in case the service is started again immediately. */
2033 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2035 /* Also, remove the runtime directory */
2036 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2038 /* Also get rid of the fd store, if that's configured. */
2039 if (s
->fd_store_preserve_mode
== EXEC_PRESERVE_NO
)
2040 service_release_fd_store(s
);
2042 /* Get rid of the IPC bits of the user */
2043 unit_unref_uid_gid(UNIT(s
), true);
2045 /* Try to delete the pid file. At this point it will be
2046 * out-of-date, and some software might be confused by it, so
2047 * let's remove it. */
2049 (void) unlink(s
->pid_file
);
2051 /* Reset TTY ownership if necessary */
2052 exec_context_revert_tty(&s
->exec_context
);
2057 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
2058 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2061 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
2065 if (s
->result
== SERVICE_SUCCESS
)
2068 service_unwatch_control_pid(s
);
2069 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2071 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
2072 if (s
->control_command
) {
2073 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
2075 r
= service_spawn(s
,
2077 s
->timeout_stop_usec
,
2078 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2083 service_set_state(s
, SERVICE_STOP_POST
);
2085 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
2090 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
2091 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2094 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
2097 case SERVICE_STOP_WATCHDOG
:
2098 case SERVICE_FINAL_WATCHDOG
:
2099 return KILL_WATCHDOG
;
2101 case SERVICE_STOP_SIGTERM
:
2102 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
2103 return KILL_RESTART
;
2106 case SERVICE_FINAL_SIGTERM
:
2107 return KILL_TERMINATE
;
2109 case SERVICE_STOP_SIGKILL
:
2110 case SERVICE_FINAL_SIGKILL
:
2114 return _KILL_OPERATION_INVALID
;
2118 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
2119 int kill_operation
, r
;
2123 if (s
->result
== SERVICE_SUCCESS
)
2126 /* Before sending any signal, make sure we track all members of this cgroup */
2127 (void) unit_watch_all_pids(UNIT(s
));
2129 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
2131 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2133 kill_operation
= state_to_kill_operation(s
, state
);
2134 r
= unit_kill_context(
2145 r
= service_arm_timer(s
, /* relative= */ true,
2146 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
);
2150 service_set_state(s
, state
);
2151 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
2152 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
2153 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2154 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2155 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
2156 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2158 service_enter_dead(s
, SERVICE_SUCCESS
, true);
2163 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2165 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2166 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
2168 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2171 static void service_enter_stop_by_notify(Service
*s
) {
2174 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2176 service_arm_timer(s
, /* relative= */ true, s
->timeout_stop_usec
);
2178 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
2179 service_set_state(s
, SERVICE_STOP_SIGTERM
);
2182 static void service_enter_stop(Service
*s
, ServiceResult f
) {
2187 if (s
->result
== SERVICE_SUCCESS
)
2190 service_unwatch_control_pid(s
);
2191 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2193 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
2194 if (s
->control_command
) {
2195 s
->control_command_id
= SERVICE_EXEC_STOP
;
2197 r
= service_spawn(s
,
2199 s
->timeout_stop_usec
,
2200 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2205 service_set_state(s
, SERVICE_STOP
);
2207 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2212 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
2213 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2216 static bool service_good(Service
*s
) {
2220 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
2223 main_pid_ok
= main_pid_good(s
);
2224 if (main_pid_ok
> 0) /* It's alive */
2226 if (main_pid_ok
== 0) /* It's dead */
2229 /* OK, we don't know anything about the main PID, maybe
2230 * because there is none. Let's check the control group
2233 return cgroup_good(s
) != 0;
2236 static void service_enter_running(Service
*s
, ServiceResult f
) {
2239 if (s
->result
== SERVICE_SUCCESS
)
2242 service_unwatch_control_pid(s
);
2244 if (s
->result
!= SERVICE_SUCCESS
)
2245 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2246 else if (service_good(s
)) {
2248 /* If there are any queued up sd_notify() notifications, process them now */
2249 if (s
->notify_state
== NOTIFY_RELOADING
)
2250 service_enter_reload_by_notify(s
);
2251 else if (s
->notify_state
== NOTIFY_STOPPING
)
2252 service_enter_stop_by_notify(s
);
2254 service_set_state(s
, SERVICE_RUNNING
);
2255 service_arm_timer(s
, /* relative= */ false, service_running_timeout(s
));
2258 } else if (s
->remain_after_exit
)
2259 service_set_state(s
, SERVICE_EXITED
);
2261 service_enter_stop(s
, SERVICE_SUCCESS
);
2264 static void service_enter_start_post(Service
*s
) {
2268 service_unwatch_control_pid(s
);
2269 service_reset_watchdog(s
);
2271 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2272 if (s
->control_command
) {
2273 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2275 r
= service_spawn(s
,
2277 s
->timeout_start_usec
,
2278 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2283 service_set_state(s
, SERVICE_START_POST
);
2285 service_enter_running(s
, SERVICE_SUCCESS
);
2290 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2291 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2294 static void service_kill_control_process(Service
*s
) {
2299 if (s
->control_pid
<= 0)
2302 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2304 _cleanup_free_
char *comm
= NULL
;
2306 (void) get_process_comm(s
->control_pid
, &comm
);
2308 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2309 s
->control_pid
, strna(comm
));
2313 static int service_adverse_to_leftover_processes(Service
*s
) {
2316 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2317 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2318 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2319 * time is quite variable (so Timeout settings aren't of use).
2321 * Here we take these two factors and refuse to start a service if there are existing processes
2322 * within a control group. Databases, while generally having some protection against multiple
2323 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2324 * aren't as rigoriously written to protect aganst against multiple use. */
2326 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2327 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2328 !s
->kill_context
.send_sigkill
)
2329 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2330 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2335 static void service_enter_start(Service
*s
) {
2343 service_unwatch_control_pid(s
);
2344 service_unwatch_main_pid(s
);
2346 r
= service_adverse_to_leftover_processes(s
);
2350 if (s
->type
== SERVICE_FORKING
) {
2351 s
->control_command_id
= SERVICE_EXEC_START
;
2352 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2354 s
->main_command
= NULL
;
2356 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2357 s
->control_command
= NULL
;
2359 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2363 if (s
->type
!= SERVICE_ONESHOT
) {
2364 /* There's no command line configured for the main command? Hmm, that is strange.
2365 * This can only happen if the configuration changes at runtime. In this case,
2366 * let's enter a failure state. */
2367 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2371 /* We force a fake state transition here. Otherwise, the unit would go directly from
2372 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2373 * in between. This way we can later trigger actions that depend on the state
2374 * transition, including SuccessAction=. */
2375 service_set_state(s
, SERVICE_START
);
2377 service_enter_start_post(s
);
2381 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2382 /* For simple + idle this is the main process. We don't apply any timeout here, but
2383 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2384 timeout
= USEC_INFINITY
;
2386 timeout
= s
->timeout_start_usec
;
2388 r
= service_spawn(s
,
2391 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
|EXEC_SETENV_MONITOR_RESULT
,
2396 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2397 /* For simple services we immediately start
2398 * the START_POST binaries. */
2400 (void) service_set_main_pid(s
, pid
);
2401 service_enter_start_post(s
);
2403 } else if (s
->type
== SERVICE_FORKING
) {
2405 /* For forking services we wait until the start
2406 * process exited. */
2408 s
->control_pid
= pid
;
2409 service_set_state(s
, SERVICE_START
);
2411 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
, SERVICE_EXEC
)) {
2413 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2415 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2416 * bus. 'notify' and 'exec' services are similar. */
2418 (void) service_set_main_pid(s
, pid
);
2419 service_set_state(s
, SERVICE_START
);
2421 assert_not_reached();
2426 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2427 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2430 static void service_enter_start_pre(Service
*s
) {
2435 service_unwatch_control_pid(s
);
2437 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2438 if (s
->control_command
) {
2440 r
= service_adverse_to_leftover_processes(s
);
2444 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2446 r
= service_spawn(s
,
2448 s
->timeout_start_usec
,
2449 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2454 service_set_state(s
, SERVICE_START_PRE
);
2456 service_enter_start(s
);
2461 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2462 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2465 static void service_enter_condition(Service
*s
) {
2470 service_unwatch_control_pid(s
);
2472 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2473 if (s
->control_command
) {
2475 r
= service_adverse_to_leftover_processes(s
);
2479 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2481 r
= service_spawn(s
,
2483 s
->timeout_start_usec
,
2484 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2490 service_set_state(s
, SERVICE_CONDITION
);
2492 service_enter_start_pre(s
);
2497 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2498 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2501 static void service_enter_restart(Service
*s
) {
2502 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2507 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2508 /* Don't restart things if we are going down anyway */
2509 log_unit_info(UNIT(s
), "Stop job pending for unit, skipping automatic restart.");
2513 /* Any units that are bound to this service must also be
2514 * restarted. We use JOB_RESTART (instead of the more obvious
2515 * JOB_START) here so that those dependency jobs will be added
2517 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2521 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2522 * stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset the counter
2523 * explicitly however via the usual "systemctl reset-failure" logic. */
2525 s
->flush_n_restarts
= false;
2527 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2529 log_unit_struct(UNIT(s
), LOG_INFO
,
2530 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2531 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2532 LOG_UNIT_MESSAGE(UNIT(s
),
2533 "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2534 "N_RESTARTS=%u", s
->n_restarts
);
2536 /* Notify clients about changed restart counter */
2537 unit_add_to_dbus_queue(UNIT(s
));
2539 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2540 * it will be canceled as part of the service_stop() call that
2541 * is executed as part of JOB_RESTART. */
2546 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2547 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2550 static void service_enter_reload_by_notify(Service
*s
) {
2551 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2556 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2557 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
2559 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2560 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2562 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2565 static void service_enter_reload(Service
*s
) {
2566 bool killed
= false;
2571 service_unwatch_control_pid(s
);
2572 s
->reload_result
= SERVICE_SUCCESS
;
2574 usec_t ts
= now(CLOCK_MONOTONIC
);
2576 if (s
->type
== SERVICE_NOTIFY_RELOAD
&& s
->main_pid
> 0) {
2577 r
= kill_and_sigcont(s
->main_pid
, s
->reload_signal
);
2579 log_unit_warning_errno(UNIT(s
), r
, "Failed to send reload signal: %m");
2586 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2587 if (s
->control_command
) {
2588 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2590 r
= service_spawn(s
,
2592 s
->timeout_start_usec
,
2593 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2596 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2600 service_set_state(s
, SERVICE_RELOAD
);
2601 } else if (killed
) {
2602 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2603 service_set_state(s
, SERVICE_RELOAD_SIGNAL
);
2605 service_enter_running(s
, SERVICE_SUCCESS
);
2609 /* Store the timestamp when we started reloading: when reloading via SIGHUP we won't leave the reload
2610 * state until we received both RELOADING=1 and READY=1 with MONOTONIC_USEC= set to a value above
2611 * this. Thus we know for sure the reload cycle was executed *after* we requested it, and is not one
2612 * that was already in progress before. */
2613 s
->reload_begin_usec
= ts
;
2617 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2618 service_enter_running(s
, SERVICE_SUCCESS
);
2621 static void service_run_next_control(Service
*s
) {
2626 assert(s
->control_command
);
2627 assert(s
->control_command
->command_next
);
2629 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2631 s
->control_command
= s
->control_command
->command_next
;
2632 service_unwatch_control_pid(s
);
2634 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2635 timeout
= s
->timeout_start_usec
;
2637 timeout
= s
->timeout_stop_usec
;
2639 r
= service_spawn(s
,
2642 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2643 (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
) ? EXEC_WRITE_CREDENTIALS
: 0)|
2644 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2645 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2646 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_START
) ? EXEC_SETENV_MONITOR_RESULT
: 0)|
2647 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2655 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2657 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2658 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2659 else if (s
->state
== SERVICE_STOP_POST
)
2660 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2661 else if (s
->state
== SERVICE_RELOAD
) {
2662 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2663 service_enter_running(s
, SERVICE_SUCCESS
);
2665 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2668 static void service_run_next_main(Service
*s
) {
2673 assert(s
->main_command
);
2674 assert(s
->main_command
->command_next
);
2675 assert(s
->type
== SERVICE_ONESHOT
);
2677 s
->main_command
= s
->main_command
->command_next
;
2678 service_unwatch_main_pid(s
);
2680 r
= service_spawn(s
,
2682 s
->timeout_start_usec
,
2683 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2688 (void) service_set_main_pid(s
, pid
);
2693 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2694 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2697 static int service_start(Unit
*u
) {
2698 Service
*s
= SERVICE(u
);
2703 /* We cannot fulfill this request right now, try again later
2705 if (IN_SET(s
->state
,
2706 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2707 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2710 /* Already on it! */
2711 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2714 /* A service that will be restarted must be stopped first to trigger BindsTo and/or OnFailure
2715 * dependencies. If a user does not want to wait for the holdoff time to elapse, the service should
2716 * be manually restarted, not started. We simply return EAGAIN here, so that any start jobs stay
2717 * queued, and assume that the auto restart timer will eventually trigger the restart. */
2718 if (IN_SET(s
->state
, SERVICE_AUTO_RESTART
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
))
2721 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
));
2723 r
= unit_acquire_invocation_id(u
);
2727 s
->result
= SERVICE_SUCCESS
;
2728 s
->reload_result
= SERVICE_SUCCESS
;
2729 s
->main_pid_known
= false;
2730 s
->main_pid_alien
= false;
2731 s
->forbid_restart
= false;
2733 s
->status_text
= mfree(s
->status_text
);
2734 s
->status_errno
= 0;
2736 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2737 s
->notify_state
= NOTIFY_UNKNOWN
;
2739 s
->watchdog_original_usec
= s
->watchdog_usec
;
2740 s
->watchdog_override_enable
= false;
2741 s
->watchdog_override_usec
= USEC_INFINITY
;
2743 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2744 exec_status_reset(&s
->main_exec_status
);
2746 /* This is not an automatic restart? Flush the restart counter then */
2747 if (s
->flush_n_restarts
) {
2749 s
->flush_n_restarts
= false;
2752 u
->reset_accounting
= true;
2754 service_enter_condition(s
);
2758 static int service_stop(Unit
*u
) {
2759 Service
*s
= SERVICE(u
);
2763 /* Don't create restart jobs from manual stops. */
2764 s
->forbid_restart
= true;
2769 case SERVICE_STOP_SIGTERM
:
2770 case SERVICE_STOP_SIGKILL
:
2771 case SERVICE_STOP_POST
:
2772 case SERVICE_FINAL_WATCHDOG
:
2773 case SERVICE_FINAL_SIGTERM
:
2774 case SERVICE_FINAL_SIGKILL
:
2778 case SERVICE_AUTO_RESTART
:
2779 /* A restart will be scheduled or is in progress. */
2780 service_set_state(s
, service_determine_dead_state(s
));
2783 case SERVICE_CONDITION
:
2784 case SERVICE_START_PRE
:
2786 case SERVICE_START_POST
:
2787 case SERVICE_RELOAD
:
2788 case SERVICE_RELOAD_SIGNAL
:
2789 case SERVICE_RELOAD_NOTIFY
:
2790 case SERVICE_STOP_WATCHDOG
:
2791 /* If there's already something running we go directly into kill mode. */
2792 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2795 case SERVICE_CLEANING
:
2796 /* If we are currently cleaning, then abort it, brutally. */
2797 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2800 case SERVICE_RUNNING
:
2801 case SERVICE_EXITED
:
2802 service_enter_stop(s
, SERVICE_SUCCESS
);
2805 case SERVICE_DEAD_BEFORE_AUTO_RESTART
:
2806 case SERVICE_FAILED_BEFORE_AUTO_RESTART
:
2808 case SERVICE_FAILED
:
2809 case SERVICE_DEAD_RESOURCES_PINNED
:
2811 /* Unknown state, or unit_stop() should already have handled these */
2812 assert_not_reached();
2816 static int service_reload(Unit
*u
) {
2817 Service
*s
= SERVICE(u
);
2821 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2823 service_enter_reload(s
);
2827 _pure_
static bool service_can_reload(Unit
*u
) {
2828 Service
*s
= SERVICE(u
);
2832 return s
->exec_command
[SERVICE_EXEC_RELOAD
] ||
2833 s
->type
== SERVICE_NOTIFY_RELOAD
;
2836 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, const ExecCommand
*current
) {
2837 Service
*s
= SERVICE(u
);
2842 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2844 const ExecCommand
*first
= s
->exec_command
[id
];
2846 /* Figure out where we are in the list by walking back to the beginning */
2847 for (const ExecCommand
*c
= current
; c
!= first
; c
= c
->command_prev
)
2853 static int service_serialize_exec_command(Unit
*u
, FILE *f
, const ExecCommand
*command
) {
2854 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2855 Service
*s
= SERVICE(u
);
2856 const char *type
, *key
;
2857 ServiceExecCommand id
;
2867 if (command
== s
->control_command
) {
2869 id
= s
->control_command_id
;
2872 id
= SERVICE_EXEC_START
;
2875 idx
= service_exec_command_index(u
, id
, command
);
2877 STRV_FOREACH(arg
, command
->argv
) {
2878 _cleanup_free_
char *e
= NULL
;
2886 if (!GREEDY_REALLOC(args
, length
+ 2 + n
+ 2))
2890 args
[length
++] = ' ';
2892 args
[length
++] = '"';
2893 memcpy(args
+ length
, e
, n
);
2895 args
[length
++] = '"';
2898 if (!GREEDY_REALLOC(args
, length
+ 1))
2903 p
= cescape(command
->path
);
2907 key
= strjoina(type
, "-command");
2909 /* We use '+1234' instead of '1234' to mark the last command in a sequence.
2910 * This is used in service_deserialize_exec_command(). */
2911 (void) serialize_item_format(
2914 service_exec_command_to_string(id
),
2915 command
->command_next
? "" : "+",
2922 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2923 Service
*s
= SERVICE(u
);
2930 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2931 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2932 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2934 if (s
->control_pid
> 0)
2935 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2937 if (s
->main_pid_known
&& s
->main_pid
> 0)
2938 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2940 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2941 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2942 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2944 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2945 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2947 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2951 service_serialize_exec_command(u
, f
, s
->control_command
);
2952 service_serialize_exec_command(u
, f
, s
->main_command
);
2954 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2957 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2960 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2964 if (s
->exec_fd_event_source
) {
2965 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2969 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2972 if (UNIT_ISSET(s
->accept_socket
)) {
2973 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2978 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2982 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2983 _cleanup_free_
char *c
= NULL
;
2986 copy
= fdset_put_dup(fds
, fs
->fd
);
2988 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2990 c
= cescape(fs
->fdname
);
2994 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2997 if (s
->main_exec_status
.pid
> 0) {
2998 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2999 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
3000 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
3002 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
3003 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
3004 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
3008 if (s
->notify_access_override
>= 0)
3009 (void) serialize_item(f
, "notify-access-override", notify_access_to_string(s
->notify_access_override
));
3011 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
3012 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
3014 if (s
->watchdog_override_enable
)
3015 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
3017 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
3018 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
3020 if (s
->reload_begin_usec
!= USEC_INFINITY
)
3021 (void) serialize_item_format(f
, "reload-begin-usec", USEC_FMT
, s
->reload_begin_usec
);
3026 int service_deserialize_exec_command(
3029 const char *value
) {
3031 Service
*s
= SERVICE(u
);
3033 unsigned idx
= 0, i
;
3034 bool control
, found
= false, last
= false;
3035 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
3036 ExecCommand
*command
= NULL
;
3037 _cleanup_free_
char *path
= NULL
;
3038 _cleanup_strv_free_
char **argv
= NULL
;
3040 enum ExecCommandState
{
3041 STATE_EXEC_COMMAND_TYPE
,
3042 STATE_EXEC_COMMAND_INDEX
,
3043 STATE_EXEC_COMMAND_PATH
,
3044 STATE_EXEC_COMMAND_ARGS
,
3045 _STATE_EXEC_COMMAND_MAX
,
3046 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
3053 control
= streq(key
, "control-command");
3055 state
= STATE_EXEC_COMMAND_TYPE
;
3058 _cleanup_free_
char *arg
= NULL
;
3060 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3067 case STATE_EXEC_COMMAND_TYPE
:
3068 id
= service_exec_command_from_string(arg
);
3072 state
= STATE_EXEC_COMMAND_INDEX
;
3074 case STATE_EXEC_COMMAND_INDEX
:
3075 /* PID 1234 is serialized as either '1234' or '+1234'. The second form is used to
3076 * mark the last command in a sequence. We warn if the deserialized command doesn't
3077 * match what we have loaded from the unit, but we don't need to warn if that is the
3080 r
= safe_atou(arg
, &idx
);
3083 last
= arg
[0] == '+';
3085 state
= STATE_EXEC_COMMAND_PATH
;
3087 case STATE_EXEC_COMMAND_PATH
:
3088 path
= TAKE_PTR(arg
);
3089 state
= STATE_EXEC_COMMAND_ARGS
;
3091 case STATE_EXEC_COMMAND_ARGS
:
3092 r
= strv_extend(&argv
, arg
);
3097 assert_not_reached();
3101 if (state
!= STATE_EXEC_COMMAND_ARGS
)
3103 if (strv_isempty(argv
))
3104 return -EINVAL
; /* At least argv[0] must be always present. */
3106 /* Let's check whether exec command on given offset matches data that we just deserialized */
3107 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
3111 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
3116 /* Command at the index we serialized is different, let's look for command that exactly
3117 * matches but is on different index. If there is no such command we will not resume execution. */
3118 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
3119 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
3123 if (command
&& control
) {
3124 s
->control_command
= command
;
3125 s
->control_command_id
= id
;
3127 s
->main_command
= command
;
3129 log_unit_debug(u
, "Current command vanished from the unit file.");
3131 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
3136 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
3137 Service
*s
= SERVICE(u
);
3145 if (streq(key
, "state")) {
3148 state
= service_state_from_string(value
);
3150 log_unit_debug(u
, "Failed to parse state value: %s", value
);
3152 s
->deserialized_state
= state
;
3153 } else if (streq(key
, "result")) {
3156 f
= service_result_from_string(value
);
3158 log_unit_debug(u
, "Failed to parse result value: %s", value
);
3159 else if (f
!= SERVICE_SUCCESS
)
3162 } else if (streq(key
, "reload-result")) {
3165 f
= service_result_from_string(value
);
3167 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
3168 else if (f
!= SERVICE_SUCCESS
)
3169 s
->reload_result
= f
;
3171 } else if (streq(key
, "control-pid")) {
3174 if (parse_pid(value
, &pid
) < 0)
3175 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
3177 s
->control_pid
= pid
;
3178 } else if (streq(key
, "main-pid")) {
3181 if (parse_pid(value
, &pid
) < 0)
3182 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
3184 (void) service_set_main_pid(s
, pid
);
3185 } else if (streq(key
, "main-pid-known")) {
3188 b
= parse_boolean(value
);
3190 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
3192 s
->main_pid_known
= b
;
3193 } else if (streq(key
, "bus-name-good")) {
3196 b
= parse_boolean(value
);
3198 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
3200 s
->bus_name_good
= b
;
3201 } else if (streq(key
, "bus-name-owner")) {
3202 r
= free_and_strdup(&s
->bus_name_owner
, value
);
3204 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
3205 } else if (streq(key
, "status-text")) {
3209 l
= cunescape(value
, 0, &t
);
3211 log_unit_debug_errno(u
, l
, "Failed to unescape status text '%s': %m", value
);
3213 free_and_replace(s
->status_text
, t
);
3215 } else if (streq(key
, "accept-socket")) {
3218 if (u
->type
!= UNIT_SOCKET
) {
3219 log_unit_debug(u
, "Failed to deserialize accept-socket: unit is not a socket");
3223 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
3225 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
3227 unit_ref_set(&s
->accept_socket
, u
, socket
);
3228 SOCKET(socket
)->n_connections
++;
3231 } else if (streq(key
, "socket-fd")) {
3234 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3235 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
3237 asynchronous_close(s
->socket_fd
);
3238 s
->socket_fd
= fdset_remove(fds
, fd
);
3240 } else if (streq(key
, "fd-store-fd")) {
3241 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
3244 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
3245 if (r
<= 0 || (fd
= parse_fd(fdv
)) < 0 || !fdset_contains(fds
, fd
)) {
3246 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3250 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3252 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3256 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
3258 /* If the value is not present, we assume the default */
3260 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
3261 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
3265 r
= fdset_remove(fds
, fd
);
3267 log_unit_error_errno(u
, r
, "Could not find deserialized fd %i in fdset: %m", fd
);
3272 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
3274 log_unit_error_errno(u
, r
, "Failed to store deserialized fd %i: %m", fd
);
3277 } else if (streq(key
, "main-exec-status-pid")) {
3280 if (parse_pid(value
, &pid
) < 0)
3281 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
3283 s
->main_exec_status
.pid
= pid
;
3284 } else if (streq(key
, "main-exec-status-code")) {
3287 if (safe_atoi(value
, &i
) < 0)
3288 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
3290 s
->main_exec_status
.code
= i
;
3291 } else if (streq(key
, "main-exec-status-status")) {
3294 if (safe_atoi(value
, &i
) < 0)
3295 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3297 s
->main_exec_status
.status
= i
;
3298 } else if (streq(key
, "main-exec-status-start"))
3299 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3300 else if (streq(key
, "main-exec-status-exit"))
3301 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3302 else if (streq(key
, "notify-access-override")) {
3303 NotifyAccess notify_access
;
3305 notify_access
= notify_access_from_string(value
);
3306 if (notify_access
< 0)
3307 log_unit_debug(u
, "Failed to parse notify-access-override value: %s", value
);
3309 s
->notify_access_override
= notify_access
;
3310 } else if (streq(key
, "watchdog-timestamp"))
3311 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3312 else if (streq(key
, "forbid-restart")) {
3315 b
= parse_boolean(value
);
3317 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3319 s
->forbid_restart
= b
;
3320 } else if (streq(key
, "stdin-fd")) {
3323 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3324 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3326 asynchronous_close(s
->stdin_fd
);
3327 s
->stdin_fd
= fdset_remove(fds
, fd
);
3328 s
->exec_context
.stdio_as_fds
= true;
3330 } else if (streq(key
, "stdout-fd")) {
3333 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3334 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3336 asynchronous_close(s
->stdout_fd
);
3337 s
->stdout_fd
= fdset_remove(fds
, fd
);
3338 s
->exec_context
.stdio_as_fds
= true;
3340 } else if (streq(key
, "stderr-fd")) {
3343 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3344 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3346 asynchronous_close(s
->stderr_fd
);
3347 s
->stderr_fd
= fdset_remove(fds
, fd
);
3348 s
->exec_context
.stdio_as_fds
= true;
3350 } else if (streq(key
, "exec-fd")) {
3353 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3354 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3356 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3358 fd
= fdset_remove(fds
, fd
);
3359 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3362 } else if (streq(key
, "watchdog-override-usec")) {
3363 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3364 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3366 s
->watchdog_override_enable
= true;
3368 } else if (streq(key
, "watchdog-original-usec")) {
3369 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3370 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3372 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3373 r
= service_deserialize_exec_command(u
, key
, value
);
3375 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3377 } else if (streq(key
, "n-restarts")) {
3378 r
= safe_atou(value
, &s
->n_restarts
);
3380 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3382 } else if (streq(key
, "flush-n-restarts")) {
3383 r
= parse_boolean(value
);
3385 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3387 s
->flush_n_restarts
= r
;
3388 } else if (streq(key
, "reload-begin-usec")) {
3389 r
= deserialize_usec(value
, &s
->reload_begin_usec
);
3391 log_unit_debug_errno(u
, r
, "Failed to parse serialized reload begin timestamp '%s', ignoring: %m", value
);
3393 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3398 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3399 const UnitActiveState
*table
;
3403 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3405 return table
[SERVICE(u
)->state
];
3408 static const char *service_sub_state_to_string(Unit
*u
) {
3411 return service_state_to_string(SERVICE(u
)->state
);
3414 static bool service_may_gc(Unit
*u
) {
3415 Service
*s
= SERVICE(u
);
3419 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3420 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3421 * have moved outside of the cgroup. */
3423 if (main_pid_good(s
) > 0 ||
3424 control_pid_good(s
) > 0)
3427 /* Only allow collection of actually dead services, i.e. not those that are in the transitionary
3428 * SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART states. */
3429 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
3435 static int service_retry_pid_file(Service
*s
) {
3438 assert(s
->pid_file
);
3439 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3441 r
= service_load_pid_file(s
, false);
3445 service_unwatch_pid_file(s
);
3447 service_enter_running(s
, SERVICE_SUCCESS
);
3451 static int service_watch_pid_file(Service
*s
) {
3454 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3456 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3460 /* the pidfile might have appeared just before we set the watch */
3461 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3462 service_retry_pid_file(s
);
3466 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3467 service_unwatch_pid_file(s
);
3471 static int service_demand_pid_file(Service
*s
) {
3472 _cleanup_free_ PathSpec
*ps
= NULL
;
3474 assert(s
->pid_file
);
3475 assert(!s
->pid_file_pathspec
);
3477 ps
= new(PathSpec
, 1);
3483 .path
= strdup(s
->pid_file
),
3484 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that keep their PID file
3485 * open all the time. */
3486 .type
= PATH_MODIFIED
,
3487 .inotify_fd
= -EBADF
,
3493 path_simplify(ps
->path
);
3495 s
->pid_file_pathspec
= TAKE_PTR(ps
);
3497 return service_watch_pid_file(s
);
3500 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3501 PathSpec
*p
= ASSERT_PTR(userdata
);
3504 s
= SERVICE(p
->unit
);
3508 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3509 assert(s
->pid_file_pathspec
);
3510 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3512 log_unit_debug(UNIT(s
), "inotify event");
3514 if (path_spec_fd_event(p
, events
) < 0)
3517 if (service_retry_pid_file(s
) == 0)
3520 if (service_watch_pid_file(s
) < 0)
3526 service_unwatch_pid_file(s
);
3527 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3531 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3532 Service
*s
= SERVICE(userdata
);
3536 log_unit_debug(UNIT(s
), "got exec-fd event");
3538 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3539 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3540 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3541 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3542 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3543 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3544 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3545 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3551 n
= read(fd
, &x
, sizeof(x
));
3553 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3556 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3558 if (n
== 0) { /* EOF → the event we are waiting for */
3560 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3562 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3563 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3565 s
->exec_fd_hot
= false;
3567 /* Nice! This is what we have been waiting for. Transition to next state. */
3568 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3569 service_enter_start_post(s
);
3571 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3576 /* A byte was read → this turns on/off the exec fd logic */
3577 assert(n
== sizeof(x
));
3584 static void service_notify_cgroup_empty_event(Unit
*u
) {
3585 Service
*s
= SERVICE(u
);
3589 log_unit_debug(u
, "Control group is empty.");
3593 /* Waiting for SIGCHLD is usually more interesting, because it includes return
3594 * codes/signals. Which is why we ignore the cgroup events for most cases, except when we
3595 * don't know pid which to expect the SIGCHLD for. */
3598 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
3599 main_pid_good(s
) == 0 &&
3600 control_pid_good(s
) == 0) {
3601 /* No chance of getting a ready notification anymore */
3602 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3606 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& main_pid_good(s
) <= 0)
3607 service_enter_start_post(s
);
3610 case SERVICE_START_POST
:
3611 if (s
->pid_file_pathspec
&&
3612 main_pid_good(s
) == 0 &&
3613 control_pid_good(s
) == 0) {
3615 /* Give up hoping for the daemon to write its PID file */
3616 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3618 service_unwatch_pid_file(s
);
3619 if (s
->state
== SERVICE_START
)
3620 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3622 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3626 case SERVICE_RUNNING
:
3627 /* service_enter_running() will figure out what to do */
3628 service_enter_running(s
, SERVICE_SUCCESS
);
3631 case SERVICE_STOP_WATCHDOG
:
3632 case SERVICE_STOP_SIGTERM
:
3633 case SERVICE_STOP_SIGKILL
:
3635 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3636 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3640 case SERVICE_STOP_POST
:
3641 case SERVICE_FINAL_WATCHDOG
:
3642 case SERVICE_FINAL_SIGTERM
:
3643 case SERVICE_FINAL_SIGKILL
:
3644 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3645 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3649 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3650 * up the cgroup earlier and should do it now. */
3651 case SERVICE_AUTO_RESTART
:
3652 unit_prune_cgroup(u
);
3660 static void service_notify_cgroup_oom_event(Unit
*u
, bool managed_oom
) {
3661 Service
*s
= SERVICE(u
);
3664 log_unit_debug(u
, "Process(es) of control group were killed by systemd-oomd.");
3666 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3668 if (s
->oom_policy
== OOM_CONTINUE
)
3673 case SERVICE_CONDITION
:
3674 case SERVICE_START_PRE
:
3676 case SERVICE_START_POST
:
3678 if (s
->oom_policy
== OOM_STOP
)
3679 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3680 else if (s
->oom_policy
== OOM_KILL
)
3681 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3685 case SERVICE_EXITED
:
3686 case SERVICE_RUNNING
:
3687 if (s
->oom_policy
== OOM_STOP
)
3688 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3689 else if (s
->oom_policy
== OOM_KILL
)
3690 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3694 case SERVICE_STOP_WATCHDOG
:
3695 case SERVICE_STOP_SIGTERM
:
3696 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3699 case SERVICE_STOP_SIGKILL
:
3700 case SERVICE_FINAL_SIGKILL
:
3701 if (s
->result
== SERVICE_SUCCESS
)
3702 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3705 case SERVICE_STOP_POST
:
3706 case SERVICE_FINAL_SIGTERM
:
3707 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3715 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3716 bool notify_dbus
= true;
3717 Service
*s
= SERVICE(u
);
3719 ExitClean clean_mode
;
3724 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3725 * considered daemons as they are typically not long running. */
3726 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3727 clean_mode
= EXIT_CLEAN_COMMAND
;
3729 clean_mode
= EXIT_CLEAN_DAEMON
;
3731 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3732 f
= SERVICE_SUCCESS
;
3733 else if (code
== CLD_EXITED
)
3734 f
= SERVICE_FAILURE_EXIT_CODE
;
3735 else if (code
== CLD_KILLED
)
3736 f
= SERVICE_FAILURE_SIGNAL
;
3737 else if (code
== CLD_DUMPED
)
3738 f
= SERVICE_FAILURE_CORE_DUMP
;
3740 assert_not_reached();
3742 if (s
->main_pid
== pid
) {
3743 /* Clean up the exec_fd event source. We want to do this here, not later in
3744 * service_set_state(), because service_enter_stop_post() calls service_spawn().
3745 * The source owns its end of the pipe, so this will close that too. */
3746 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3748 /* Forking services may occasionally move to a new PID.
3749 * As long as they update the PID file before exiting the old
3750 * PID, they're fine. */
3751 if (service_load_pid_file(s
, false) > 0)
3755 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3757 if (s
->main_command
) {
3758 /* If this is not a forking service than the
3759 * main process got started and hence we copy
3760 * the exit status so that it is recorded both
3761 * as main and as control process exit
3764 s
->main_command
->exec_status
= s
->main_exec_status
;
3766 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3767 f
= SERVICE_SUCCESS
;
3768 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3770 /* If this is a forked process, then we should
3771 * ignore the return value if this was
3772 * configured for the starter process */
3774 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3775 f
= SERVICE_SUCCESS
;
3778 unit_log_process_exit(
3781 service_exec_command_to_string(SERVICE_EXEC_START
),
3782 f
== SERVICE_SUCCESS
,
3785 if (s
->result
== SERVICE_SUCCESS
)
3788 if (s
->main_command
&&
3789 s
->main_command
->command_next
&&
3790 s
->type
== SERVICE_ONESHOT
&&
3791 f
== SERVICE_SUCCESS
) {
3793 /* There is another command to execute, so let's do that. */
3795 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3796 service_run_next_main(s
);
3799 s
->main_command
= NULL
;
3801 /* Services with ExitType=cgroup do not act on main PID exiting, unless the cgroup is
3803 if (s
->exit_type
== SERVICE_EXIT_MAIN
|| cgroup_good(s
) <= 0) {
3804 /* The service exited, so the service is officially gone. */
3807 case SERVICE_START_POST
:
3808 case SERVICE_RELOAD
:
3809 case SERVICE_RELOAD_SIGNAL
:
3810 case SERVICE_RELOAD_NOTIFY
:
3811 /* If neither main nor control processes are running then the current
3812 * state can never exit cleanly, hence immediately terminate the
3814 if (control_pid_good(s
) <= 0)
3815 service_enter_stop(s
, f
);
3817 /* Otherwise need to wait until the operation is done. */
3821 /* Need to wait until the operation is done. */
3825 if (s
->type
== SERVICE_ONESHOT
) {
3826 /* This was our main goal, so let's go on */
3827 if (f
== SERVICE_SUCCESS
)
3828 service_enter_start_post(s
);
3830 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3832 } else if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
)) {
3833 /* Only enter running through a notification, so that the
3834 * SERVICE_START state signifies that no ready notification
3835 * has been received */
3836 if (f
!= SERVICE_SUCCESS
)
3837 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3838 else if (!s
->remain_after_exit
|| service_get_notify_access(s
) == NOTIFY_MAIN
)
3839 /* The service has never been and will never be active */
3840 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3845 case SERVICE_RUNNING
:
3846 service_enter_running(s
, f
);
3849 case SERVICE_STOP_WATCHDOG
:
3850 case SERVICE_STOP_SIGTERM
:
3851 case SERVICE_STOP_SIGKILL
:
3853 if (control_pid_good(s
) <= 0)
3854 service_enter_stop_post(s
, f
);
3856 /* If there is still a control process, wait for that first */
3859 case SERVICE_STOP_POST
:
3861 if (control_pid_good(s
) <= 0)
3862 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3866 case SERVICE_FINAL_WATCHDOG
:
3867 case SERVICE_FINAL_SIGTERM
:
3868 case SERVICE_FINAL_SIGKILL
:
3870 if (control_pid_good(s
) <= 0)
3871 service_enter_dead(s
, f
, true);
3875 assert_not_reached();
3880 } else if (s
->control_pid
== pid
) {
3886 if (s
->control_command
) {
3887 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3889 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3890 f
= SERVICE_SUCCESS
;
3893 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3894 if (s
->state
== SERVICE_CONDITION
) {
3895 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3896 UNIT(s
)->condition_result
= false;
3897 f
= SERVICE_SKIP_CONDITION
;
3899 } else if (f
== SERVICE_SUCCESS
) {
3900 UNIT(s
)->condition_result
= true;
3905 kind
= "Condition check process";
3907 kind
= "Control process";
3908 success
= f
== SERVICE_SUCCESS
;
3911 unit_log_process_exit(
3914 service_exec_command_to_string(s
->control_command_id
),
3918 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3921 if (s
->control_command
&&
3922 s
->control_command
->command_next
&&
3923 f
== SERVICE_SUCCESS
) {
3925 /* There is another command to * execute, so let's do that. */
3927 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3928 service_run_next_control(s
);
3931 /* No further commands for this step, so let's figure out what to do next */
3933 s
->control_command
= NULL
;
3934 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3936 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3940 case SERVICE_CONDITION
:
3941 if (f
== SERVICE_SUCCESS
)
3942 service_enter_start_pre(s
);
3944 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3947 case SERVICE_START_PRE
:
3948 if (f
== SERVICE_SUCCESS
)
3949 service_enter_start(s
);
3951 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3955 if (s
->type
!= SERVICE_FORKING
)
3956 /* Maybe spurious event due to a reload that changed the type? */
3959 if (f
!= SERVICE_SUCCESS
) {
3960 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3965 bool has_start_post
;
3968 /* Let's try to load the pid file here if we can.
3969 * The PID file might actually be created by a START_POST
3970 * script. In that case don't worry if the loading fails. */
3972 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3973 r
= service_load_pid_file(s
, !has_start_post
);
3974 if (!has_start_post
&& r
< 0) {
3975 r
= service_demand_pid_file(s
);
3976 if (r
< 0 || cgroup_good(s
) == 0)
3977 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3981 service_search_main_pid(s
);
3983 service_enter_start_post(s
);
3986 case SERVICE_START_POST
:
3987 if (f
!= SERVICE_SUCCESS
) {
3988 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3995 r
= service_load_pid_file(s
, true);
3997 r
= service_demand_pid_file(s
);
3998 if (r
< 0 || cgroup_good(s
) == 0)
3999 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
4003 service_search_main_pid(s
);
4005 service_enter_running(s
, SERVICE_SUCCESS
);
4008 case SERVICE_RELOAD
:
4009 case SERVICE_RELOAD_SIGNAL
:
4010 case SERVICE_RELOAD_NOTIFY
:
4011 if (f
== SERVICE_SUCCESS
)
4012 if (service_load_pid_file(s
, true) < 0)
4013 service_search_main_pid(s
);
4015 s
->reload_result
= f
;
4017 /* If the last notification we received from the service process indicates
4018 * we are still reloading, then don't leave reloading state just yet, just
4019 * transition into SERVICE_RELOAD_NOTIFY, to wait for the READY=1 coming,
4021 if (s
->notify_state
== NOTIFY_RELOADING
)
4022 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4024 service_enter_running(s
, SERVICE_SUCCESS
);
4028 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
4031 case SERVICE_STOP_WATCHDOG
:
4032 case SERVICE_STOP_SIGTERM
:
4033 case SERVICE_STOP_SIGKILL
:
4034 if (main_pid_good(s
) <= 0)
4035 service_enter_stop_post(s
, f
);
4037 /* If there is still a service process around, wait until
4038 * that one quit, too */
4041 case SERVICE_STOP_POST
:
4042 if (main_pid_good(s
) <= 0)
4043 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
4046 case SERVICE_FINAL_WATCHDOG
:
4047 case SERVICE_FINAL_SIGTERM
:
4048 case SERVICE_FINAL_SIGKILL
:
4049 if (main_pid_good(s
) <= 0)
4050 service_enter_dead(s
, f
, true);
4053 case SERVICE_CLEANING
:
4055 if (s
->clean_result
== SERVICE_SUCCESS
)
4056 s
->clean_result
= f
;
4058 service_enter_dead(s
, SERVICE_SUCCESS
, false);
4062 assert_not_reached();
4065 } else /* Neither control nor main PID? If so, don't notify about anything */
4066 notify_dbus
= false;
4068 /* Notify clients about changed exit status */
4070 unit_add_to_dbus_queue(u
);
4072 /* We watch the main/control process otherwise we can't retrieve the unit they
4073 * belong to with cgroupv1. But if they are not our direct child, we won't get a
4074 * SIGCHLD for them. Therefore we need to look for others to watch so we can
4075 * detect when the cgroup becomes empty. Note that the control process is always
4076 * our child so it's pointless to watch all other processes. */
4077 if (!control_pid_good(s
))
4078 if (!s
->main_pid_known
|| s
->main_pid_alien
)
4079 (void) unit_enqueue_rewatch_pids(u
);
4082 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4083 Service
*s
= SERVICE(userdata
);
4086 assert(source
== s
->timer_event_source
);
4090 case SERVICE_CONDITION
:
4091 case SERVICE_START_PRE
:
4093 case SERVICE_START_POST
:
4094 switch (s
->timeout_start_failure_mode
) {
4096 case SERVICE_TIMEOUT_TERMINATE
:
4097 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
4098 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4101 case SERVICE_TIMEOUT_ABORT
:
4102 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
4103 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4106 case SERVICE_TIMEOUT_KILL
:
4107 if (s
->kill_context
.send_sigkill
) {
4108 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
4109 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4111 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
4112 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4117 assert_not_reached();
4121 case SERVICE_RUNNING
:
4122 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
4123 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
4126 case SERVICE_RELOAD
:
4127 case SERVICE_RELOAD_SIGNAL
:
4128 case SERVICE_RELOAD_NOTIFY
:
4129 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
4130 service_kill_control_process(s
);
4131 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
4132 service_enter_running(s
, SERVICE_SUCCESS
);
4136 switch (s
->timeout_stop_failure_mode
) {
4138 case SERVICE_TIMEOUT_TERMINATE
:
4139 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
4140 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4143 case SERVICE_TIMEOUT_ABORT
:
4144 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
4145 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4148 case SERVICE_TIMEOUT_KILL
:
4149 if (s
->kill_context
.send_sigkill
) {
4150 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
4151 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4153 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
4154 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4159 assert_not_reached();
4163 case SERVICE_STOP_WATCHDOG
:
4164 if (s
->kill_context
.send_sigkill
) {
4165 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
4166 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4168 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
4169 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4173 case SERVICE_STOP_SIGTERM
:
4174 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4175 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
4176 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4177 } else if (s
->kill_context
.send_sigkill
) {
4178 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
4179 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4181 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
4182 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4187 case SERVICE_STOP_SIGKILL
:
4188 /* Uh, we sent a SIGKILL and it is still not gone?
4189 * Must be something we cannot kill, so let's just be
4190 * weirded out and continue */
4192 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
4193 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4196 case SERVICE_STOP_POST
:
4197 switch (s
->timeout_stop_failure_mode
) {
4199 case SERVICE_TIMEOUT_TERMINATE
:
4200 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
4201 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4204 case SERVICE_TIMEOUT_ABORT
:
4205 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
4206 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4209 case SERVICE_TIMEOUT_KILL
:
4210 if (s
->kill_context
.send_sigkill
) {
4211 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
4212 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4214 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
4215 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4220 assert_not_reached();
4224 case SERVICE_FINAL_WATCHDOG
:
4225 if (s
->kill_context
.send_sigkill
) {
4226 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
4227 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4229 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
4230 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4234 case SERVICE_FINAL_SIGTERM
:
4235 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4236 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
4237 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4238 } else if (s
->kill_context
.send_sigkill
) {
4239 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
4240 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4242 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
4243 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4248 case SERVICE_FINAL_SIGKILL
:
4249 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
4250 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
4253 case SERVICE_AUTO_RESTART
:
4254 if (s
->restart_usec
> 0)
4255 log_unit_debug(UNIT(s
),
4256 "Service restart interval %s expired, scheduling restart.",
4257 FORMAT_TIMESPAN(service_restart_usec_next(s
), USEC_PER_SEC
));
4259 log_unit_debug(UNIT(s
),
4260 "Service has no hold-off time (RestartSec=0), scheduling restart.");
4262 service_enter_restart(s
);
4265 case SERVICE_CLEANING
:
4266 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
4268 if (s
->clean_result
== SERVICE_SUCCESS
)
4269 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
4271 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
4275 assert_not_reached();
4281 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4282 Service
*s
= SERVICE(userdata
);
4283 usec_t watchdog_usec
;
4286 assert(source
== s
->watchdog_event_source
);
4288 watchdog_usec
= service_get_watchdog_usec(s
);
4290 if (UNIT(s
)->manager
->service_watchdogs
) {
4291 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
4292 FORMAT_TIMESPAN(watchdog_usec
, 1));
4294 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4296 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
4297 FORMAT_TIMESPAN(watchdog_usec
, 1));
4302 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
4305 NotifyAccess notify_access
= service_get_notify_access(s
);
4307 if (notify_access
== NOTIFY_NONE
) {
4308 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
4312 if (notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
4313 if (s
->main_pid
!= 0)
4314 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
);
4316 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
);
4321 if (notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
4322 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
4323 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
,
4324 pid
, s
->main_pid
, s
->control_pid
);
4325 else if (s
->main_pid
!= 0)
4326 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
);
4327 else if (s
->control_pid
!= 0)
4328 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
);
4330 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
);
4338 static void service_force_watchdog(Service
*s
) {
4339 if (!UNIT(s
)->manager
->service_watchdogs
)
4342 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
4343 s
->status_text
?: "<unset>");
4345 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4348 static void service_notify_message(
4350 const struct ucred
*ucred
,
4354 Service
*s
= SERVICE(u
);
4355 bool notify_dbus
= false;
4356 usec_t monotonic_usec
= USEC_INFINITY
;
4363 if (!service_notify_message_authorized(s
, ucred
->pid
, fds
))
4366 if (DEBUG_LOGGING
) {
4367 _cleanup_free_
char *cc
= NULL
;
4369 cc
= strv_join(tags
, ", ");
4370 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4373 /* Interpret MAINPID= */
4374 e
= strv_find_startswith(tags
, "MAINPID=");
4375 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
)) {
4378 if (parse_pid(e
, &new_main_pid
) < 0)
4379 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4380 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4382 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4384 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4386 if (ucred
->uid
== 0) {
4387 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
);
4390 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4393 (void) service_set_main_pid(s
, new_main_pid
);
4395 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4397 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4404 /* Parse MONOTONIC_USEC= */
4405 e
= strv_find_startswith(tags
, "MONOTONIC_USEC=");
4407 r
= safe_atou64(e
, &monotonic_usec
);
4409 log_unit_warning_errno(u
, r
, "Failed to parse MONOTONIC_USEC= field in notification message, ignoring: %s", e
);
4412 /* Interpret READY=/STOPPING=/RELOADING=. STOPPING= wins over the others, and READY= over RELOADING= */
4413 if (strv_contains(tags
, "STOPPING=1")) {
4414 s
->notify_state
= NOTIFY_STOPPING
;
4416 if (IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
4417 service_enter_stop_by_notify(s
);
4421 } else if (strv_contains(tags
, "READY=1")) {
4423 s
->notify_state
= NOTIFY_READY
;
4425 /* Type=notify services inform us about completed initialization with READY=1 */
4426 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
4427 s
->state
== SERVICE_START
)
4428 service_enter_start_post(s
);
4430 /* Sending READY=1 while we are reloading informs us that the reloading is complete. */
4431 if (s
->state
== SERVICE_RELOAD_NOTIFY
)
4432 service_enter_running(s
, SERVICE_SUCCESS
);
4434 /* Combined RELOADING=1 and READY=1? Then this is indication that the service started and
4435 * immediately finished reloading. */
4436 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4437 strv_contains(tags
, "RELOADING=1") &&
4438 monotonic_usec
!= USEC_INFINITY
&&
4439 monotonic_usec
>= s
->reload_begin_usec
) {
4440 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
4442 /* Propagate a reload explicitly */
4443 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
4445 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload, ignoring: %s", bus_error_message(&error
, r
));
4447 service_enter_running(s
, SERVICE_SUCCESS
);
4452 } else if (strv_contains(tags
, "RELOADING=1")) {
4454 s
->notify_state
= NOTIFY_RELOADING
;
4456 /* Sending RELOADING=1 after we send SIGHUP to request a reload will transition
4457 * things to "reload-notify" state, where we'll wait for READY=1 to let us know the
4458 * reload is done. Note that we insist on a timestamp being sent along here, so that
4459 * we know for sure this is a reload cycle initiated *after* we sent the signal */
4460 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4461 monotonic_usec
!= USEC_INFINITY
&&
4462 monotonic_usec
>= s
->reload_begin_usec
)
4463 /* Note, we don't call service_enter_reload_by_notify() here, because we
4464 * don't need reload propagation nor do we want to restart the time-out. */
4465 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4467 if (s
->state
== SERVICE_RUNNING
)
4468 service_enter_reload_by_notify(s
);
4473 /* Interpret STATUS= */
4474 e
= strv_find_startswith(tags
, "STATUS=");
4476 _cleanup_free_
char *t
= NULL
;
4479 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4480 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4481 if (strlen(e
) > STATUS_TEXT_MAX
)
4482 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4483 else if (!utf8_is_valid(e
))
4484 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4492 if (!streq_ptr(s
->status_text
, t
)) {
4493 free_and_replace(s
->status_text
, t
);
4498 /* Interpret NOTIFYACCESS= */
4499 e
= strv_find_startswith(tags
, "NOTIFYACCESS=");
4501 NotifyAccess notify_access
;
4503 notify_access
= notify_access_from_string(e
);
4504 if (notify_access
< 0)
4505 log_unit_warning_errno(u
, notify_access
,
4506 "Failed to parse NOTIFYACCESS= field value '%s' in notification message, ignoring: %m", e
);
4508 /* We don't need to check whether the new access mode is more strict than what is
4509 * already in use, since only the privileged process is allowed to change it
4510 * in the first place. */
4511 if (service_get_notify_access(s
) != notify_access
) {
4512 service_override_notify_access(s
, notify_access
);
4517 /* Interpret ERRNO= */
4518 e
= strv_find_startswith(tags
, "ERRNO=");
4522 status_errno
= parse_errno(e
);
4523 if (status_errno
< 0)
4524 log_unit_warning_errno(u
, status_errno
,
4525 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4526 else if (s
->status_errno
!= status_errno
) {
4527 s
->status_errno
= status_errno
;
4532 /* Interpret EXTEND_TIMEOUT= */
4533 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4535 usec_t extend_timeout_usec
;
4536 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4537 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4539 service_extend_timeout(s
, extend_timeout_usec
);
4542 /* Interpret WATCHDOG= */
4543 e
= strv_find_startswith(tags
, "WATCHDOG=");
4546 service_reset_watchdog(s
);
4547 else if (streq(e
, "trigger"))
4548 service_force_watchdog(s
);
4550 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4553 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4555 usec_t watchdog_override_usec
;
4556 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4557 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4559 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4562 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4563 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4564 * fds, but optional when pushing in new fds, for compatibility reasons. */
4565 if (strv_contains(tags
, "FDSTOREREMOVE=1")) {
4568 name
= strv_find_startswith(tags
, "FDNAME=");
4569 if (!name
|| !fdname_is_valid(name
))
4570 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4572 service_remove_fd_store(s
, name
);
4574 } else if (strv_contains(tags
, "FDSTORE=1")) {
4577 name
= strv_find_startswith(tags
, "FDNAME=");
4578 if (name
&& !fdname_is_valid(name
)) {
4579 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4583 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4586 /* Notify clients about changed status or main pid */
4588 unit_add_to_dbus_queue(u
);
4591 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4592 Service
*s
= SERVICE(u
);
4596 if (!s
->timer_event_source
)
4599 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4602 if (t
== USEC_INFINITY
)
4609 static usec_t
service_get_timeout_start_usec(Unit
*u
) {
4610 Service
*s
= SERVICE(ASSERT_PTR(u
));
4611 return s
->timeout_start_usec
;
4614 static bool pick_up_pid_from_bus_name(Service
*s
) {
4617 /* If the service is running but we have no main PID yet, get it from the owner of the D-Bus name */
4619 return !pid_is_valid(s
->main_pid
) &&
4625 SERVICE_RELOAD_SIGNAL
,
4626 SERVICE_RELOAD_NOTIFY
);
4629 static int bus_name_pid_lookup_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*ret_error
) {
4630 const sd_bus_error
*e
;
4631 Unit
*u
= ASSERT_PTR(userdata
);
4639 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4641 if (!s
->bus_name
|| !pick_up_pid_from_bus_name(s
))
4644 e
= sd_bus_message_get_error(reply
);
4646 r
= sd_bus_error_get_errno(e
);
4647 log_warning_errno(r
, "GetConnectionUnixProcessID() failed: %s", bus_error_message(e
, r
));
4651 r
= sd_bus_message_read(reply
, "u", &pid
);
4653 bus_log_parse_error(r
);
4657 if (!pid_is_valid(pid
)) {
4658 log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "GetConnectionUnixProcessID() returned invalid PID");
4662 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, (pid_t
) pid
);
4664 (void) service_set_main_pid(s
, pid
);
4665 (void) unit_watch_pid(UNIT(s
), pid
, false);
4669 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4671 Service
*s
= SERVICE(u
);
4677 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4679 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4681 s
->bus_name_good
= new_owner
;
4683 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4684 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4686 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4690 if (s
->type
== SERVICE_DBUS
) {
4692 /* service_enter_running() will figure out what to
4694 if (s
->state
== SERVICE_RUNNING
)
4695 service_enter_running(s
, SERVICE_SUCCESS
);
4696 else if (s
->state
== SERVICE_START
&& new_owner
)
4697 service_enter_start_post(s
);
4699 } else if (new_owner
&& pick_up_pid_from_bus_name(s
)) {
4701 /* Try to acquire PID from bus service */
4703 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4705 r
= sd_bus_call_method_async(
4706 u
->manager
->api_bus
,
4707 &s
->bus_name_pid_lookup_slot
,
4708 "org.freedesktop.DBus",
4709 "/org/freedesktop/DBus",
4710 "org.freedesktop.DBus",
4711 "GetConnectionUnixProcessID",
4712 bus_name_pid_lookup_callback
,
4717 log_debug_errno(r
, "Failed to request owner PID of service name, ignoring: %m");
4721 int service_set_socket_fd(
4726 bool selinux_context_net
) {
4728 _cleanup_free_
char *peer_text
= NULL
;
4734 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4735 * to be configured. We take ownership of the passed fd on success. */
4737 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4740 if (s
->socket_fd
>= 0)
4743 assert(!s
->socket_peer
);
4745 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4748 if (getpeername_pretty(fd
, true, &peer_text
) >= 0) {
4750 if (UNIT(s
)->description
) {
4751 _cleanup_free_
char *a
= NULL
;
4753 a
= strjoin(UNIT(s
)->description
, " (", peer_text
, ")");
4757 r
= unit_set_description(UNIT(s
), a
);
4759 r
= unit_set_description(UNIT(s
), peer_text
);
4764 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4769 s
->socket_peer
= socket_peer_ref(peer
);
4770 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4772 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4776 static void service_reset_failed(Unit
*u
) {
4777 Service
*s
= SERVICE(u
);
4781 if (s
->state
== SERVICE_FAILED
)
4782 service_set_state(s
, service_determine_dead_state(s
));
4784 s
->result
= SERVICE_SUCCESS
;
4785 s
->reload_result
= SERVICE_SUCCESS
;
4786 s
->clean_result
= SERVICE_SUCCESS
;
4788 s
->flush_n_restarts
= false;
4791 static int service_kill(Unit
*u
, KillWho who
, int signo
, int code
, int value
, sd_bus_error
*error
) {
4792 Service
*s
= SERVICE(u
);
4796 return unit_kill_common(u
, who
, signo
, code
, value
, s
->main_pid
, s
->control_pid
, error
);
4799 static int service_main_pid(Unit
*u
) {
4800 Service
*s
= SERVICE(u
);
4807 static int service_control_pid(Unit
*u
) {
4808 Service
*s
= SERVICE(u
);
4812 return s
->control_pid
;
4815 static bool service_needs_console(Unit
*u
) {
4816 Service
*s
= SERVICE(u
);
4820 /* We provide our own implementation of this here, instead of relying of the generic implementation
4821 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4823 if (!exec_context_may_touch_console(&s
->exec_context
))
4826 return IN_SET(s
->state
,
4833 SERVICE_RELOAD_SIGNAL
,
4834 SERVICE_RELOAD_NOTIFY
,
4836 SERVICE_STOP_WATCHDOG
,
4837 SERVICE_STOP_SIGTERM
,
4838 SERVICE_STOP_SIGKILL
,
4840 SERVICE_FINAL_WATCHDOG
,
4841 SERVICE_FINAL_SIGTERM
,
4842 SERVICE_FINAL_SIGKILL
);
4845 static int service_exit_status(Unit
*u
) {
4846 Service
*s
= SERVICE(u
);
4850 if (s
->main_exec_status
.pid
<= 0 ||
4851 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4854 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4857 return s
->main_exec_status
.status
;
4860 static const char* service_status_text(Unit
*u
) {
4861 Service
*s
= SERVICE(u
);
4865 return s
->status_text
;
4868 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4869 _cleanup_strv_free_
char **l
= NULL
;
4870 bool may_clean_fdstore
= false;
4871 Service
*s
= SERVICE(u
);
4877 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4880 /* Determine if there's anything we could potentially clean */
4881 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4885 if (mask
& EXEC_CLEAN_FDSTORE
)
4886 may_clean_fdstore
= s
->n_fd_store
> 0 || s
->n_fd_store_max
> 0;
4888 if (strv_isempty(l
) && !may_clean_fdstore
)
4889 return -EUNATCH
; /* Nothing to potentially clean */
4891 /* Let's clean the stuff we can clean quickly */
4892 if (may_clean_fdstore
)
4893 service_release_fd_store(s
);
4895 /* If we are done, leave quickly */
4896 if (strv_isempty(l
)) {
4897 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4898 service_set_state(s
, SERVICE_DEAD
);
4902 /* We need to clean disk stuff. This is slow, hence do it out of process, and change state */
4903 service_unwatch_control_pid(s
);
4904 s
->clean_result
= SERVICE_SUCCESS
;
4905 s
->control_command
= NULL
;
4906 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4908 r
= service_arm_timer(s
, /* relative= */ true, s
->exec_context
.timeout_clean_usec
);
4912 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4916 service_set_state(s
, SERVICE_CLEANING
);
4921 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4922 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4923 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
4927 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4928 Service
*s
= SERVICE(u
);
4929 ExecCleanMask mask
= 0;
4935 r
= exec_context_get_clean_mask(&s
->exec_context
, &mask
);
4939 if (s
->n_fd_store_max
> 0)
4940 mask
|= EXEC_CLEAN_FDSTORE
;
4946 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4947 if (t
== JOB_START
&&
4948 result
== JOB_DONE
&&
4949 SERVICE(u
)->type
== SERVICE_ONESHOT
)
4950 return "Finished %s.";
4952 /* Fall back to generic */
4956 static int service_can_start(Unit
*u
) {
4957 Service
*s
= SERVICE(u
);
4962 /* Make sure we don't enter a busy loop of some kind. */
4963 r
= unit_test_start_limit(u
);
4965 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
4972 static void service_release_resources(Unit
*u
) {
4973 Service
*s
= SERVICE(ASSERT_PTR(u
));
4975 /* Invoked by the unit state engine, whenever it realizes that unit is dead and there's no job
4976 * anymore for it, and it hence is a good idea to release resources */
4978 /* Don't release resources if this is a transitionary failed/dead state
4979 * (i.e. SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART), insist on a permanent
4981 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
4984 log_unit_debug(u
, "Releasing resources...");
4986 service_release_socket_fd(s
);
4987 service_release_stdio_fd(s
);
4989 if (s
->fd_store_preserve_mode
!= EXEC_PRESERVE_YES
)
4990 service_release_fd_store(s
);
4992 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4993 service_set_state(s
, SERVICE_DEAD
);
4996 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4997 [SERVICE_RESTART_NO
] = "no",
4998 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4999 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
5000 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
5001 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
5002 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
5003 [SERVICE_RESTART_ALWAYS
] = "always",
5006 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
5008 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
5009 [SERVICE_SIMPLE
] = "simple",
5010 [SERVICE_FORKING
] = "forking",
5011 [SERVICE_ONESHOT
] = "oneshot",
5012 [SERVICE_DBUS
] = "dbus",
5013 [SERVICE_NOTIFY
] = "notify",
5014 [SERVICE_NOTIFY_RELOAD
] = "notify-reload",
5015 [SERVICE_IDLE
] = "idle",
5016 [SERVICE_EXEC
] = "exec",
5019 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
5021 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
5022 [SERVICE_EXIT_MAIN
] = "main",
5023 [SERVICE_EXIT_CGROUP
] = "cgroup",
5026 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
5028 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5029 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
5030 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
5031 [SERVICE_EXEC_START
] = "ExecStart",
5032 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
5033 [SERVICE_EXEC_RELOAD
] = "ExecReload",
5034 [SERVICE_EXEC_STOP
] = "ExecStop",
5035 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
5038 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
5040 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5041 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
5042 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
5043 [SERVICE_EXEC_START
] = "ExecStartEx",
5044 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
5045 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
5046 [SERVICE_EXEC_STOP
] = "ExecStopEx",
5047 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
5050 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
5052 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
5053 [NOTIFY_UNKNOWN
] = "unknown",
5054 [NOTIFY_READY
] = "ready",
5055 [NOTIFY_RELOADING
] = "reloading",
5056 [NOTIFY_STOPPING
] = "stopping",
5059 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
5061 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
5062 [SERVICE_SUCCESS
] = "success",
5063 [SERVICE_FAILURE_RESOURCES
] = "resources",
5064 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
5065 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
5066 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
5067 [SERVICE_FAILURE_SIGNAL
] = "signal",
5068 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
5069 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
5070 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
5071 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
5072 [SERVICE_SKIP_CONDITION
] = "exec-condition",
5075 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
5077 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
5078 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
5079 [SERVICE_TIMEOUT_ABORT
] = "abort",
5080 [SERVICE_TIMEOUT_KILL
] = "kill",
5083 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
5085 const UnitVTable service_vtable
= {
5086 .object_size
= sizeof(Service
),
5087 .exec_context_offset
= offsetof(Service
, exec_context
),
5088 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
5089 .kill_context_offset
= offsetof(Service
, kill_context
),
5090 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
5096 .private_section
= "Service",
5098 .can_transient
= true,
5099 .can_delegate
= true,
5101 .can_set_managed_oom
= true,
5103 .init
= service_init
,
5104 .done
= service_done
,
5105 .load
= service_load
,
5106 .release_resources
= service_release_resources
,
5108 .coldplug
= service_coldplug
,
5110 .dump
= service_dump
,
5112 .start
= service_start
,
5113 .stop
= service_stop
,
5114 .reload
= service_reload
,
5116 .can_reload
= service_can_reload
,
5118 .kill
= service_kill
,
5119 .clean
= service_clean
,
5120 .can_clean
= service_can_clean
,
5122 .freeze
= unit_freeze_vtable_common
,
5123 .thaw
= unit_thaw_vtable_common
,
5125 .serialize
= service_serialize
,
5126 .deserialize_item
= service_deserialize_item
,
5128 .active_state
= service_active_state
,
5129 .sub_state_to_string
= service_sub_state_to_string
,
5131 .will_restart
= service_will_restart
,
5133 .may_gc
= service_may_gc
,
5135 .sigchld_event
= service_sigchld_event
,
5137 .reset_failed
= service_reset_failed
,
5139 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
5140 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
5141 .notify_message
= service_notify_message
,
5143 .main_pid
= service_main_pid
,
5144 .control_pid
= service_control_pid
,
5146 .bus_name_owner_change
= service_bus_name_owner_change
,
5148 .bus_set_property
= bus_service_set_property
,
5149 .bus_commit_properties
= bus_service_commit_properties
,
5151 .get_timeout
= service_get_timeout
,
5152 .get_timeout_start_usec
= service_get_timeout_start_usec
,
5153 .needs_console
= service_needs_console
,
5154 .exit_status
= service_exit_status
,
5155 .status_text
= service_status_text
,
5157 .status_message_formats
= {
5158 .finished_start_job
= {
5159 [JOB_FAILED
] = "Failed to start %s.",
5161 .finished_stop_job
= {
5162 [JOB_DONE
] = "Stopped %s.",
5163 [JOB_FAILED
] = "Stopped (with error) %s.",
5165 .finished_job
= service_finished_job
,
5168 .can_start
= service_can_start
,