1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
8 #include "sd-messages.h"
10 #include "alloc-util.h"
12 #include "bus-error.h"
13 #include "bus-kernel.h"
15 #include "chase-symlinks.h"
16 #include "constants.h"
17 #include "dbus-service.h"
18 #include "dbus-unit.h"
21 #include "exit-status.h"
24 #include "format-util.h"
25 #include "load-dropin.h"
26 #include "load-fragment.h"
29 #include "parse-util.h"
30 #include "path-util.h"
31 #include "process-util.h"
32 #include "random-util.h"
33 #include "serialize.h"
35 #include "signal-util.h"
37 #include "stdio-util.h"
38 #include "string-table.h"
39 #include "string-util.h"
41 #include "unit-name.h"
45 #define service_spawn(...) service_spawn_internal(__func__, __VA_ARGS__)
47 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
48 [SERVICE_DEAD
] = UNIT_INACTIVE
,
49 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
50 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
51 [SERVICE_START
] = UNIT_ACTIVATING
,
52 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
53 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
54 [SERVICE_EXITED
] = UNIT_ACTIVE
,
55 [SERVICE_RELOAD
] = UNIT_RELOADING
,
56 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
57 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
58 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
59 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
60 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
61 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
62 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
63 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
64 [SERVICE_FAILED
] = UNIT_FAILED
,
65 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
66 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
69 /* For Type=idle we never want to delay any other jobs, hence we
70 * consider idle jobs active as soon as we start working on them */
71 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
72 [SERVICE_DEAD
] = UNIT_INACTIVE
,
73 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
74 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
75 [SERVICE_START
] = UNIT_ACTIVE
,
76 [SERVICE_START_POST
] = UNIT_ACTIVE
,
77 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
78 [SERVICE_EXITED
] = UNIT_ACTIVE
,
79 [SERVICE_RELOAD
] = UNIT_RELOADING
,
80 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
81 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
82 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
83 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
84 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
85 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
86 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
87 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
88 [SERVICE_FAILED
] = UNIT_FAILED
,
89 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
90 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
93 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
94 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
95 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
96 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
98 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
99 static void service_enter_reload_by_notify(Service
*s
);
101 static void service_init(Unit
*u
) {
102 Service
*s
= SERVICE(u
);
105 assert(u
->load_state
== UNIT_STUB
);
107 s
->timeout_start_usec
= u
->manager
->default_timeout_start_usec
;
108 s
->timeout_stop_usec
= u
->manager
->default_timeout_stop_usec
;
109 s
->timeout_abort_usec
= u
->manager
->default_timeout_abort_usec
;
110 s
->timeout_abort_set
= u
->manager
->default_timeout_abort_set
;
111 s
->restart_usec
= u
->manager
->default_restart_usec
;
112 s
->runtime_max_usec
= USEC_INFINITY
;
113 s
->type
= _SERVICE_TYPE_INVALID
;
114 s
->socket_fd
= -EBADF
;
115 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -EBADF
;
116 s
->guess_main_pid
= true;
118 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
120 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
121 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
123 s
->watchdog_original_usec
= USEC_INFINITY
;
125 s
->oom_policy
= _OOM_POLICY_INVALID
;
128 static void service_unwatch_control_pid(Service
*s
) {
131 if (s
->control_pid
<= 0)
134 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->control_pid
));
137 static void service_unwatch_main_pid(Service
*s
) {
140 if (s
->main_pid
<= 0)
143 unit_unwatch_pid(UNIT(s
), TAKE_PID(s
->main_pid
));
146 static void service_unwatch_pid_file(Service
*s
) {
147 if (!s
->pid_file_pathspec
)
150 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
151 path_spec_unwatch(s
->pid_file_pathspec
);
152 path_spec_done(s
->pid_file_pathspec
);
153 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
156 static int service_set_main_pid(Service
*s
, pid_t pid
) {
162 if (pid
== getpid_cached())
165 if (s
->main_pid
== pid
&& s
->main_pid_known
)
168 if (s
->main_pid
!= pid
) {
169 service_unwatch_main_pid(s
);
170 exec_status_start(&s
->main_exec_status
, pid
);
174 s
->main_pid_known
= true;
175 s
->main_pid_alien
= pid_is_my_child(pid
) == 0;
177 if (s
->main_pid_alien
)
178 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", pid
);
183 void service_close_socket_fd(Service
*s
) {
186 /* Undo the effect of service_set_socket_fd(). */
188 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
190 if (UNIT_ISSET(s
->accept_socket
)) {
191 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
192 unit_ref_unset(&s
->accept_socket
);
195 s
->socket_peer
= socket_peer_unref(s
->socket_peer
);
198 static void service_stop_watchdog(Service
*s
) {
201 s
->watchdog_event_source
= sd_event_source_disable_unref(s
->watchdog_event_source
);
202 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
205 static void service_start_watchdog(Service
*s
) {
206 usec_t watchdog_usec
;
211 watchdog_usec
= service_get_watchdog_usec(s
);
212 if (!timestamp_is_set(watchdog_usec
)) {
213 service_stop_watchdog(s
);
217 if (s
->watchdog_event_source
) {
218 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
220 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
224 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
226 r
= sd_event_add_time(
227 UNIT(s
)->manager
->event
,
228 &s
->watchdog_event_source
,
230 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
231 service_dispatch_watchdog
, s
);
233 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
237 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
239 /* Let's process everything else which might be a sign
240 * of living before we consider a service died. */
241 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
244 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
247 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
253 /* Extends the specified event source timer to at least the specified time, unless it is already later
259 r
= sd_event_source_get_time(source
, ¤t
);
262 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
263 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
267 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
270 r
= sd_event_source_set_time(source
, extended
);
273 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
274 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for event source '%s', ignoring %m", strna(desc
));
278 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
283 if (!timestamp_is_set(extend_timeout_usec
))
286 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
288 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
289 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
292 static void service_reset_watchdog(Service
*s
) {
295 dual_timestamp_get(&s
->watchdog_timestamp
);
296 service_start_watchdog(s
);
299 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
302 s
->watchdog_override_enable
= true;
303 s
->watchdog_override_usec
= watchdog_override_usec
;
304 service_reset_watchdog(s
);
306 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
307 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
310 static void service_fd_store_unlink(ServiceFDStore
*fs
) {
316 assert(fs
->service
->n_fd_store
> 0);
317 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
318 fs
->service
->n_fd_store
--;
321 sd_event_source_disable_unref(fs
->event_source
);
328 static void service_release_fd_store(Service
*s
) {
331 if (s
->n_keep_fd_store
> 0)
334 log_unit_debug(UNIT(s
), "Releasing all stored fds");
336 service_fd_store_unlink(s
->fd_store
);
338 assert(s
->n_fd_store
== 0);
341 static void service_release_resources(Unit
*u
) {
342 Service
*s
= SERVICE(u
);
346 if (!s
->fd_store
&& s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stderr_fd
< 0)
349 log_unit_debug(u
, "Releasing resources.");
351 s
->stdin_fd
= safe_close(s
->stdin_fd
);
352 s
->stdout_fd
= safe_close(s
->stdout_fd
);
353 s
->stderr_fd
= safe_close(s
->stderr_fd
);
355 service_release_fd_store(s
);
358 static void service_done(Unit
*u
) {
359 Service
*s
= SERVICE(u
);
363 s
->pid_file
= mfree(s
->pid_file
);
364 s
->status_text
= mfree(s
->status_text
);
366 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, false);
367 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
368 s
->control_command
= NULL
;
369 s
->main_command
= NULL
;
371 dynamic_creds_unref(&s
->dynamic_creds
);
373 exit_status_set_free(&s
->restart_prevent_status
);
374 exit_status_set_free(&s
->restart_force_status
);
375 exit_status_set_free(&s
->success_status
);
377 /* This will leak a process, but at least no memory or any of
379 service_unwatch_main_pid(s
);
380 service_unwatch_control_pid(s
);
381 service_unwatch_pid_file(s
);
384 unit_unwatch_bus_name(u
, s
->bus_name
);
385 s
->bus_name
= mfree(s
->bus_name
);
388 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
390 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
391 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
393 service_close_socket_fd(s
);
395 unit_ref_unset(&s
->accept_socket
);
397 service_stop_watchdog(s
);
399 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
400 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
402 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
404 service_release_resources(u
);
407 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
408 ServiceFDStore
*fs
= ASSERT_PTR(userdata
);
412 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
413 log_unit_debug(UNIT(fs
->service
),
414 "Received %s on stored fd %d (%s), closing.",
415 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
416 fs
->fd
, strna(fs
->fdname
));
417 service_fd_store_unlink(fs
);
421 static int service_add_fd_store(Service
*s
, int fd
, const char *name
, bool do_poll
) {
425 /* fd is always consumed if we return >= 0 */
430 if (s
->n_fd_store
>= s
->n_fd_store_max
)
431 return -EXFULL
; /* Our store is full.
432 * Use this errno rather than E[NM]FILE to distinguish from
433 * the case where systemd itself hits the file limit. */
435 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
436 r
= same_fd(i
->fd
, fd
);
441 return 0; /* fd already included */
445 fs
= new(ServiceFDStore
, 1);
449 *fs
= (ServiceFDStore
) {
453 .fdname
= strdup(name
?: "stored"),
462 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fd
, 0, on_fd_store_io
, fs
);
463 if (r
< 0 && r
!= -EPERM
) { /* EPERM indicates fds that aren't pollable, which is OK */
468 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
471 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
474 return 1; /* fd newly stored */
477 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
482 while (fdset_size(fds
) > 0) {
483 _cleanup_close_
int fd
= -EBADF
;
485 fd
= fdset_steal_first(fds
);
489 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
491 return log_unit_warning_errno(UNIT(s
), r
,
492 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
495 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
497 log_unit_debug(UNIT(s
), "Added fd %i (%s) to fd store.", fd
, strna(name
));
504 static void service_remove_fd_store(Service
*s
, const char *name
) {
508 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
509 if (!streq(fs
->fdname
, name
))
512 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
513 service_fd_store_unlink(fs
);
517 static usec_t
service_running_timeout(Service
*s
) {
522 if (s
->runtime_rand_extra_usec
!= 0) {
523 delta
= random_u64_range(s
->runtime_rand_extra_usec
);
524 log_unit_debug(UNIT(s
), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta
, USEC_PER_SEC
));
527 return usec_add(usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
,
528 s
->runtime_max_usec
),
532 static int service_arm_timer(Service
*s
, usec_t usec
) {
537 if (s
->timer_event_source
) {
538 r
= sd_event_source_set_time(s
->timer_event_source
, usec
);
542 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
545 if (usec
== USEC_INFINITY
)
548 r
= sd_event_add_time(
549 UNIT(s
)->manager
->event
,
550 &s
->timer_event_source
,
553 service_dispatch_timer
, s
);
557 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
562 static int service_verify(Service
*s
) {
564 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
566 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++)
567 LIST_FOREACH(command
, command
, s
->exec_command
[c
]) {
568 if (!path_is_absolute(command
->path
) && !filename_is_valid(command
->path
))
569 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
570 "Service %s= binary path \"%s\" is neither a valid executable name nor an absolute path. Refusing.",
572 service_exec_command_to_string(c
));
573 if (strv_isempty(command
->argv
))
574 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
575 "Service has an empty argv in %s=. Refusing.",
576 service_exec_command_to_string(c
));
579 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
] &&
580 UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
581 /* FailureAction= only makes sense if one of the start or stop commands is specified.
582 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
583 * either a command or SuccessAction= are required. */
585 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
587 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
])
588 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
590 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
591 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.");
593 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
)
594 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.");
596 if (s
->type
== SERVICE_ONESHOT
&&
597 !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
))
598 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.");
600 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
))
601 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has RestartForceExitStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
603 if (s
->type
== SERVICE_ONESHOT
&& s
->exit_type
== SERVICE_EXIT_CGROUP
)
604 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has ExitType=cgroup set, which isn't allowed for Type=oneshot services. Refusing.");
606 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
)
607 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.");
609 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
))
610 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.");
612 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
613 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
615 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
616 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
618 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
619 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
621 if (s
->runtime_max_usec
== USEC_INFINITY
&& s
->runtime_rand_extra_usec
!= 0)
622 log_unit_warning(UNIT(s
), "Service has RuntimeRandomizedExtraSec= setting, but no RuntimeMaxSec=. Ignoring.");
624 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& cg_unified() < CGROUP_UNIFIED_SYSTEMD
)
625 log_unit_warning(UNIT(s
), "Service has ExitType=cgroup set, but we are running with legacy cgroups v1, which might not work correctly. Continuing.");
630 static int service_add_default_dependencies(Service
*s
) {
635 if (!UNIT(s
)->default_dependencies
)
638 /* Add a number of automatic dependencies useful for the
639 * majority of services. */
641 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
642 /* First, pull in the really early boot stuff, and
643 * require it, so that we fail if we can't acquire
646 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
651 /* In the --user instance there's no sysinit.target,
652 * in that case require basic.target instead. */
654 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
659 /* Second, if the rest of the base system is in the same
660 * transaction, order us after it, but do not pull it in or
661 * even require it. */
662 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
666 /* Third, add us in for normal shutdown. */
667 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
670 static void service_fix_stdio(Service
*s
) {
673 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
674 * default value that is subject to automatic overriding triggered by other settings and an explicit
675 * choice the user can make. We don't distinguish between these cases currently. */
677 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
678 s
->exec_context
.stdin_data_size
> 0)
679 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
681 if (IN_SET(s
->exec_context
.std_input
,
683 EXEC_INPUT_TTY_FORCE
,
686 EXEC_INPUT_NAMED_FD
))
689 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
690 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
691 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
692 * duplicated for both input and output at the same time (since they then would cause a feedback
693 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
695 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
696 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
697 s
->exec_context
.std_error
= UNIT(s
)->manager
->default_std_error
;
699 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
700 s
->exec_context
.std_output
= UNIT(s
)->manager
->default_std_output
;
703 static int service_setup_bus_name(Service
*s
) {
708 /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */
712 if (s
->type
== SERVICE_DBUS
) {
713 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
715 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
717 /* We always want to be ordered against dbus.socket if both are in the transaction. */
718 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
720 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
723 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
725 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
727 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
732 static int service_add_extras(Service
*s
) {
737 if (s
->type
== _SERVICE_TYPE_INVALID
) {
738 /* Figure out a type automatically */
740 s
->type
= SERVICE_DBUS
;
741 else if (s
->exec_command
[SERVICE_EXEC_START
])
742 s
->type
= SERVICE_SIMPLE
;
744 s
->type
= SERVICE_ONESHOT
;
747 /* Oneshot services have disabled start timeout by default */
748 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
749 s
->timeout_start_usec
= USEC_INFINITY
;
751 service_fix_stdio(s
);
753 r
= unit_patch_contexts(UNIT(s
));
757 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
761 r
= unit_set_default_slice(UNIT(s
));
765 /* If the service needs the notify socket, let's enable it automatically. */
766 if (s
->notify_access
== NOTIFY_NONE
&&
767 (s
->type
== SERVICE_NOTIFY
|| s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
768 s
->notify_access
= NOTIFY_MAIN
;
770 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
771 * delegation is on, in that case it we assume the payload knows better what to do and can process
772 * things in a more focused way. */
773 if (s
->oom_policy
< 0)
774 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->default_oom_policy
;
776 /* Let the kernel do the killing if that's requested. */
777 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
779 r
= service_add_default_dependencies(s
);
783 r
= service_setup_bus_name(s
);
790 static int service_load(Unit
*u
) {
791 Service
*s
= SERVICE(u
);
794 r
= unit_load_fragment_and_dropin(u
, true);
798 if (u
->load_state
!= UNIT_LOADED
)
801 /* This is a new unit? Then let's add in some extras */
802 r
= service_add_extras(s
);
806 return service_verify(s
);
809 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
810 ServiceExecCommand c
;
811 Service
*s
= SERVICE(u
);
816 prefix
= strempty(prefix
);
817 prefix2
= strjoina(prefix
, "\t");
820 "%sService State: %s\n"
822 "%sReload Result: %s\n"
823 "%sClean Result: %s\n"
824 "%sPermissionsStartOnly: %s\n"
825 "%sRootDirectoryStartOnly: %s\n"
826 "%sRemainAfterExit: %s\n"
827 "%sGuessMainPID: %s\n"
830 "%sNotifyAccess: %s\n"
831 "%sNotifyState: %s\n"
833 prefix
, service_state_to_string(s
->state
),
834 prefix
, service_result_to_string(s
->result
),
835 prefix
, service_result_to_string(s
->reload_result
),
836 prefix
, service_result_to_string(s
->clean_result
),
837 prefix
, yes_no(s
->permissions_start_only
),
838 prefix
, yes_no(s
->root_directory_start_only
),
839 prefix
, yes_no(s
->remain_after_exit
),
840 prefix
, yes_no(s
->guess_main_pid
),
841 prefix
, service_type_to_string(s
->type
),
842 prefix
, service_restart_to_string(s
->restart
),
843 prefix
, notify_access_to_string(s
->notify_access
),
844 prefix
, notify_state_to_string(s
->notify_state
),
845 prefix
, oom_policy_to_string(s
->oom_policy
));
847 if (s
->control_pid
> 0)
849 "%sControl PID: "PID_FMT
"\n",
850 prefix
, s
->control_pid
);
854 "%sMain PID: "PID_FMT
"\n"
855 "%sMain PID Known: %s\n"
856 "%sMain PID Alien: %s\n",
858 prefix
, yes_no(s
->main_pid_known
),
859 prefix
, yes_no(s
->main_pid_alien
));
864 prefix
, s
->pid_file
);
869 "%sBus Name Good: %s\n",
871 prefix
, yes_no(s
->bus_name_good
));
873 if (UNIT_ISSET(s
->accept_socket
))
875 "%sAccept Socket: %s\n",
876 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
880 "%sTimeoutStartSec: %s\n"
881 "%sTimeoutStopSec: %s\n"
882 "%sTimeoutStartFailureMode: %s\n"
883 "%sTimeoutStopFailureMode: %s\n",
884 prefix
, FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
),
885 prefix
, FORMAT_TIMESPAN(s
->timeout_start_usec
, USEC_PER_SEC
),
886 prefix
, FORMAT_TIMESPAN(s
->timeout_stop_usec
, USEC_PER_SEC
),
887 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
888 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
890 if (s
->timeout_abort_set
)
892 "%sTimeoutAbortSec: %s\n",
893 prefix
, FORMAT_TIMESPAN(s
->timeout_abort_usec
, USEC_PER_SEC
));
896 "%sRuntimeMaxSec: %s\n"
897 "%sRuntimeRandomizedExtraSec: %s\n"
898 "%sWatchdogSec: %s\n",
899 prefix
, FORMAT_TIMESPAN(s
->runtime_max_usec
, USEC_PER_SEC
),
900 prefix
, FORMAT_TIMESPAN(s
->runtime_rand_extra_usec
, USEC_PER_SEC
),
901 prefix
, FORMAT_TIMESPAN(s
->watchdog_usec
, USEC_PER_SEC
));
903 kill_context_dump(&s
->kill_context
, f
, prefix
);
904 exec_context_dump(&s
->exec_context
, f
, prefix
);
906 for (c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
908 if (!s
->exec_command
[c
])
911 fprintf(f
, "%s-> %s:\n",
912 prefix
, service_exec_command_to_string(c
));
914 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
918 fprintf(f
, "%sStatus Text: %s\n",
919 prefix
, s
->status_text
);
921 if (s
->n_fd_store_max
> 0)
923 "%sFile Descriptor Store Max: %u\n"
924 "%sFile Descriptor Store Current: %zu\n",
925 prefix
, s
->n_fd_store_max
,
926 prefix
, s
->n_fd_store
);
928 cgroup_context_dump(UNIT(s
), f
, prefix
);
931 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
935 assert(pid_is_valid(pid
));
937 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
938 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
941 if (pid
== getpid_cached() || pid
== 1)
942 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
944 if (pid
== s
->control_pid
)
945 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
947 if (!pid_is_alive(pid
))
948 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
950 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
951 if (owner
== UNIT(s
)) {
952 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
953 return 1; /* Yay, it's definitely a good PID */
956 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
959 static int service_load_pid_file(Service
*s
, bool may_warn
) {
960 bool questionable_pid_file
= false;
961 _cleanup_free_
char *k
= NULL
;
962 _cleanup_close_
int fd
= -EBADF
;
971 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
973 r
= chase_symlinks(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
975 log_unit_debug_errno(UNIT(s
), r
,
976 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
978 questionable_pid_file
= true;
980 r
= chase_symlinks(s
->pid_file
, NULL
, 0, NULL
, &fd
);
983 return log_unit_full_errno(UNIT(s
), prio
, fd
,
984 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
986 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
987 * chase_symlinks() returned us into a proper fd first. */
988 r
= read_one_line_file(FORMAT_PROC_FD_PATH(fd
), &k
);
990 return log_unit_error_errno(UNIT(s
), r
,
991 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
994 r
= parse_pid(k
, &pid
);
996 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
998 if (s
->main_pid_known
&& pid
== s
->main_pid
)
1001 r
= service_is_suitable_main_pid(s
, pid
, prio
);
1007 if (questionable_pid_file
)
1008 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1009 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1011 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1013 if (fstat(fd
, &st
) < 0)
1014 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1017 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1018 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pid
);
1020 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
);
1023 if (s
->main_pid_known
) {
1024 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
, pid
);
1026 service_unwatch_main_pid(s
);
1027 s
->main_pid_known
= false;
1029 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pid
);
1031 r
= service_set_main_pid(s
, pid
);
1035 r
= unit_watch_pid(UNIT(s
), pid
, false);
1036 if (r
< 0) /* FIXME: we need to do something here */
1037 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", pid
);
1042 static void service_search_main_pid(Service
*s
) {
1048 /* If we know it anyway, don't ever fall back to unreliable
1050 if (s
->main_pid_known
)
1053 if (!s
->guess_main_pid
)
1056 assert(s
->main_pid
<= 0);
1058 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1061 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1062 if (service_set_main_pid(s
, pid
) < 0)
1065 r
= unit_watch_pid(UNIT(s
), pid
, false);
1067 /* FIXME: we need to do something here */
1068 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", pid
);
1071 static void service_set_state(Service
*s
, ServiceState state
) {
1072 ServiceState old_state
;
1073 const UnitActiveState
*table
;
1077 if (s
->state
!= state
)
1078 bus_unit_send_pending_change_signal(UNIT(s
), false);
1080 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1082 old_state
= s
->state
;
1085 service_unwatch_pid_file(s
);
1088 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1091 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1092 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1093 SERVICE_AUTO_RESTART
,
1095 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1098 SERVICE_START
, SERVICE_START_POST
,
1099 SERVICE_RUNNING
, SERVICE_RELOAD
,
1100 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1101 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1102 service_unwatch_main_pid(s
);
1103 s
->main_command
= NULL
;
1107 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1109 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1110 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1111 SERVICE_CLEANING
)) {
1112 service_unwatch_control_pid(s
);
1113 s
->control_command
= NULL
;
1114 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1117 if (IN_SET(state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
)) {
1118 unit_unwatch_all_pids(UNIT(s
));
1119 unit_dequeue_rewatch_pids(UNIT(s
));
1123 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1124 SERVICE_RUNNING
, SERVICE_RELOAD
,
1125 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1126 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
) &&
1127 !(state
== SERVICE_DEAD
&& UNIT(s
)->job
))
1128 service_close_socket_fd(s
);
1130 if (state
!= SERVICE_START
)
1131 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
1133 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1134 service_stop_watchdog(s
);
1136 /* For the inactive states unit_notify() will trim the cgroup,
1137 * but for exit we have to do that ourselves... */
1138 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1139 unit_prune_cgroup(UNIT(s
));
1141 if (old_state
!= state
)
1142 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1144 unit_notify(UNIT(s
), table
[old_state
], table
[state
],
1145 (s
->reload_result
== SERVICE_SUCCESS
? 0 : UNIT_NOTIFY_RELOAD_FAILURE
) |
1146 (s
->will_auto_restart
? UNIT_NOTIFY_WILL_AUTO_RESTART
: 0));
1149 static usec_t
service_coldplug_timeout(Service
*s
) {
1152 switch (s
->deserialized_state
) {
1154 case SERVICE_CONDITION
:
1155 case SERVICE_START_PRE
:
1157 case SERVICE_START_POST
:
1158 case SERVICE_RELOAD
:
1159 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1161 case SERVICE_RUNNING
:
1162 return service_running_timeout(s
);
1165 case SERVICE_STOP_SIGTERM
:
1166 case SERVICE_STOP_SIGKILL
:
1167 case SERVICE_STOP_POST
:
1168 case SERVICE_FINAL_SIGTERM
:
1169 case SERVICE_FINAL_SIGKILL
:
1170 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1172 case SERVICE_STOP_WATCHDOG
:
1173 case SERVICE_FINAL_WATCHDOG
:
1174 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1176 case SERVICE_AUTO_RESTART
:
1177 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, s
->restart_usec
);
1179 case SERVICE_CLEANING
:
1180 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1183 return USEC_INFINITY
;
1187 static int service_coldplug(Unit
*u
) {
1188 Service
*s
= SERVICE(u
);
1192 assert(s
->state
== SERVICE_DEAD
);
1194 if (s
->deserialized_state
== s
->state
)
1197 r
= service_arm_timer(s
, service_coldplug_timeout(s
));
1201 if (s
->main_pid
> 0 &&
1202 pid_is_unwaited(s
->main_pid
) &&
1203 (IN_SET(s
->deserialized_state
,
1204 SERVICE_START
, SERVICE_START_POST
,
1205 SERVICE_RUNNING
, SERVICE_RELOAD
,
1206 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1207 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1208 r
= unit_watch_pid(UNIT(s
), s
->main_pid
, false);
1213 if (s
->control_pid
> 0 &&
1214 pid_is_unwaited(s
->control_pid
) &&
1215 IN_SET(s
->deserialized_state
,
1216 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1218 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1219 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1220 SERVICE_CLEANING
)) {
1221 r
= unit_watch_pid(UNIT(s
), s
->control_pid
, false);
1226 if (!IN_SET(s
->deserialized_state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_AUTO_RESTART
, SERVICE_CLEANING
)) {
1227 (void) unit_enqueue_rewatch_pids(u
);
1228 (void) unit_setup_dynamic_creds(u
);
1229 (void) unit_setup_exec_runtime(u
);
1232 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
1233 service_start_watchdog(s
);
1235 if (UNIT_ISSET(s
->accept_socket
)) {
1236 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1238 if (socket
->max_connections_per_source
> 0) {
1241 /* Make a best-effort attempt at bumping the connection count */
1242 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1243 socket_peer_unref(s
->socket_peer
);
1244 s
->socket_peer
= peer
;
1249 service_set_state(s
, s
->deserialized_state
);
1253 static int service_collect_fds(
1257 size_t *n_socket_fds
,
1258 size_t *n_storage_fds
) {
1260 _cleanup_strv_free_
char **rfd_names
= NULL
;
1261 _cleanup_free_
int *rfds
= NULL
;
1262 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1268 assert(n_socket_fds
);
1269 assert(n_storage_fds
);
1271 if (s
->socket_fd
>= 0) {
1273 /* Pass the per-connection socket */
1278 rfds
[0] = s
->socket_fd
;
1280 rfd_names
= strv_new("connection");
1288 /* Pass all our configured sockets for singleton services */
1290 UNIT_FOREACH_DEPENDENCY(u
, UNIT(s
), UNIT_ATOM_TRIGGERED_BY
) {
1291 _cleanup_free_
int *cfds
= NULL
;
1295 if (u
->type
!= UNIT_SOCKET
)
1300 cn_fds
= socket_collect_fds(sock
, &cfds
);
1308 rfds
= TAKE_PTR(cfds
);
1309 rn_socket_fds
= cn_fds
;
1313 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1317 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1320 rn_socket_fds
+= cn_fds
;
1323 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1329 if (s
->n_fd_store
> 0) {
1334 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1340 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1345 n_fds
= rn_socket_fds
;
1347 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1348 rfds
[n_fds
] = fs
->fd
;
1349 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1350 if (!rfd_names
[n_fds
])
1357 rfd_names
[n_fds
] = NULL
;
1360 *fds
= TAKE_PTR(rfds
);
1361 *fd_names
= TAKE_PTR(rfd_names
);
1362 *n_socket_fds
= rn_socket_fds
;
1363 *n_storage_fds
= rn_storage_fds
;
1368 static int service_allocate_exec_fd_event_source(
1371 sd_event_source
**ret_event_source
) {
1373 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1378 assert(ret_event_source
);
1380 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1382 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1384 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1386 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1388 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1390 (void) sd_event_source_set_description(source
, "service exec_fd");
1392 r
= sd_event_source_set_io_fd_own(source
, true);
1394 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1396 *ret_event_source
= TAKE_PTR(source
);
1400 static int service_allocate_exec_fd(
1402 sd_event_source
**ret_event_source
,
1405 _cleanup_close_pair_
int p
[] = { -1, -1 };
1409 assert(ret_event_source
);
1410 assert(ret_exec_fd
);
1412 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1413 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1415 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1420 *ret_exec_fd
= TAKE_FD(p
[1]);
1425 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1428 /* Notifications are accepted depending on the process and
1429 * the access setting of the service:
1430 * process: \ access: NONE MAIN EXEC ALL
1431 * main no yes yes yes
1432 * control no no yes yes
1433 * other (forked) no no no yes */
1435 if (flags
& EXEC_IS_CONTROL
)
1436 /* A control process */
1437 return IN_SET(s
->notify_access
, NOTIFY_EXEC
, NOTIFY_ALL
);
1439 /* We only spawn main processes and control processes, so any
1440 * process that is not a control process is a main process */
1441 return s
->notify_access
!= NOTIFY_NONE
;
1444 static Service
*service_get_triggering_service(Service
*s
) {
1445 Unit
*candidate
= NULL
, *other
;
1449 /* Return the service which triggered service 's', this means dependency
1450 * types which include the UNIT_ATOM_ON_{FAILURE,SUCCESS}_OF atoms.
1452 * N.B. if there are multiple services which could trigger 's' via OnFailure=
1453 * or OnSuccess= then we return NULL. This is since we don't know from which
1454 * one to propagate the exit status. */
1456 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_FAILURE_OF
) {
1462 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_SUCCESS_OF
) {
1468 return SERVICE(candidate
);
1471 log_unit_warning(UNIT(s
), "multiple trigger source candidates for exit status propagation (%s, %s), skipping.",
1472 candidate
->id
, other
->id
);
1476 static int service_spawn_internal(
1484 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1487 .stdout_fd
= -EBADF
,
1488 .stderr_fd
= -EBADF
,
1491 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1492 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1502 log_unit_debug(UNIT(s
), "Will spawn child (%s): %s", caller
, c
->path
);
1504 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1508 assert(!s
->exec_fd_event_source
);
1510 if (flags
& EXEC_IS_CONTROL
) {
1511 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1512 if (s
->permissions_start_only
)
1513 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1514 if (s
->root_directory_start_only
)
1515 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1518 if ((flags
& EXEC_PASS_FDS
) ||
1519 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1520 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1521 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1523 r
= service_collect_fds(s
,
1525 &exec_params
.fd_names
,
1526 &exec_params
.n_socket_fds
,
1527 &exec_params
.n_storage_fds
);
1531 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1534 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1535 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1540 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), timeout
));
1544 our_env
= new0(char*, 12);
1548 if (service_exec_needs_notify_socket(s
, flags
)) {
1549 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1552 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1555 if (s
->main_pid
> 0)
1556 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
) < 0)
1559 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1560 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1564 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1567 if (s
->socket_fd
>= 0) {
1568 union sockaddr_union sa
;
1569 socklen_t salen
= sizeof(sa
);
1571 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1572 * useful. Note that we do this only when we are still connected at this point in time, which we might
1573 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1574 * in ENOTCONN), and just use whate we can use. */
1576 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1577 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1578 _cleanup_free_
char *addr
= NULL
;
1582 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1586 t
= strjoin("REMOTE_ADDR=", addr
);
1589 our_env
[n_env
++] = t
;
1591 r
= sockaddr_port(&sa
.sa
, &port
);
1595 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1597 our_env
[n_env
++] = t
;
1601 Service
*env_source
= NULL
;
1602 const char *monitor_prefix
;
1603 if (flags
& EXEC_SETENV_RESULT
) {
1605 monitor_prefix
= "";
1606 } else if (flags
& EXEC_SETENV_MONITOR_RESULT
) {
1607 env_source
= service_get_triggering_service(s
);
1608 monitor_prefix
= "MONITOR_";
1612 if (asprintf(our_env
+ n_env
++, "%sSERVICE_RESULT=%s", monitor_prefix
, service_result_to_string(env_source
->result
)) < 0)
1615 if (env_source
->main_exec_status
.pid
> 0 &&
1616 dual_timestamp_is_set(&env_source
->main_exec_status
.exit_timestamp
)) {
1617 if (asprintf(our_env
+ n_env
++, "%sEXIT_CODE=%s", monitor_prefix
, sigchld_code_to_string(env_source
->main_exec_status
.code
)) < 0)
1620 if (env_source
->main_exec_status
.code
== CLD_EXITED
)
1621 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%i", monitor_prefix
, env_source
->main_exec_status
.status
);
1623 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%s", monitor_prefix
, signal_to_string(env_source
->main_exec_status
.status
));
1629 if (env_source
!= s
) {
1630 if (!sd_id128_is_null(UNIT(env_source
)->invocation_id
)) {
1631 r
= asprintf(our_env
+ n_env
++, "%sINVOCATION_ID=" SD_ID128_FORMAT_STR
,
1632 monitor_prefix
, SD_ID128_FORMAT_VAL(UNIT(env_source
)->invocation_id
));
1637 if (asprintf(our_env
+ n_env
++, "%sUNIT=%s", monitor_prefix
, UNIT(env_source
)->id
) < 0)
1642 if (UNIT(s
)->activation_details
) {
1643 r
= activation_details_append_env(UNIT(s
)->activation_details
, &our_env
);
1646 /* The number of env vars added here can vary, rather than keeping the allocation block in
1647 * sync manually, these functions simply use the strv methods to append to it, so we need
1648 * to update n_env when we are done in case of future usage. */
1652 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1656 final_env
= strv_env_merge(exec_params
.environment
, our_env
);
1660 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1661 SET_FLAG(exec_params
.flags
, EXEC_NSS_DYNAMIC_BYPASS
,
1662 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1664 strv_free_and_replace(exec_params
.environment
, final_env
);
1665 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1666 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1667 if (s
->type
== SERVICE_IDLE
)
1668 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1669 exec_params
.stdin_fd
= s
->stdin_fd
;
1670 exec_params
.stdout_fd
= s
->stdout_fd
;
1671 exec_params
.stderr_fd
= s
->stderr_fd
;
1673 r
= exec_spawn(UNIT(s
),
1683 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1684 s
->exec_fd_hot
= false;
1686 r
= unit_watch_pid(UNIT(s
), pid
, true);
1695 static int main_pid_good(Service
*s
) {
1698 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1700 /* If we know the pid file, then let's just check if it is
1702 if (s
->main_pid_known
) {
1704 /* If it's an alien child let's check if it is still
1706 if (s
->main_pid_alien
&& s
->main_pid
> 0)
1707 return pid_is_alive(s
->main_pid
);
1709 /* .. otherwise assume we'll get a SIGCHLD for it,
1710 * which we really should wait for to collect exit
1711 * status and code */
1712 return s
->main_pid
> 0;
1715 /* We don't know the pid */
1719 static int control_pid_good(Service
*s
) {
1722 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1723 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1724 * means: we can't figure it out. */
1726 return s
->control_pid
> 0;
1729 static int cgroup_good(Service
*s
) {
1734 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1737 if (!UNIT(s
)->cgroup_path
)
1740 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1747 static bool service_shall_restart(Service
*s
, const char **reason
) {
1750 /* Don't restart after manual stops */
1751 if (s
->forbid_restart
) {
1752 *reason
= "manual stop";
1756 /* Never restart if this is configured as special exception */
1757 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1758 *reason
= "prevented by exit status";
1762 /* Restart if the exit code/status are configured as restart triggers */
1763 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1764 *reason
= "forced by exit status";
1768 *reason
= "restart setting";
1769 switch (s
->restart
) {
1771 case SERVICE_RESTART_NO
:
1774 case SERVICE_RESTART_ALWAYS
:
1775 return s
->result
!= SERVICE_SKIP_CONDITION
;
1777 case SERVICE_RESTART_ON_SUCCESS
:
1778 return s
->result
== SERVICE_SUCCESS
;
1780 case SERVICE_RESTART_ON_FAILURE
:
1781 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1783 case SERVICE_RESTART_ON_ABNORMAL
:
1784 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1786 case SERVICE_RESTART_ON_WATCHDOG
:
1787 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1789 case SERVICE_RESTART_ON_ABORT
:
1790 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1793 assert_not_reached();
1797 static bool service_will_restart(Unit
*u
) {
1798 Service
*s
= SERVICE(u
);
1802 if (s
->will_auto_restart
)
1804 if (s
->state
== SERVICE_AUTO_RESTART
)
1807 return unit_will_restart_default(u
);
1810 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1811 ServiceState end_state
;
1816 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1817 * undo what has already been enqueued. */
1818 if (unit_stop_pending(UNIT(s
)))
1819 allow_restart
= false;
1821 if (s
->result
== SERVICE_SUCCESS
)
1824 if (s
->result
== SERVICE_SUCCESS
) {
1825 unit_log_success(UNIT(s
));
1826 end_state
= SERVICE_DEAD
;
1827 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
1828 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
1829 end_state
= SERVICE_DEAD
;
1831 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
1832 end_state
= SERVICE_FAILED
;
1834 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
1837 log_unit_debug(UNIT(s
), "Service restart not allowed.");
1842 shall_restart
= service_shall_restart(s
, &reason
);
1843 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
1844 shall_restart
? "" : "not ",
1847 s
->will_auto_restart
= true;
1850 /* Make sure service_release_resources() doesn't destroy our FD store, while we are changing through
1851 * SERVICE_FAILED/SERVICE_DEAD before entering into SERVICE_AUTO_RESTART. */
1852 s
->n_keep_fd_store
++;
1854 service_set_state(s
, end_state
);
1856 if (s
->will_auto_restart
) {
1857 s
->will_auto_restart
= false;
1859 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->restart_usec
));
1861 s
->n_keep_fd_store
--;
1865 service_set_state(s
, SERVICE_AUTO_RESTART
);
1867 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
1868 * user can still introspect the counter. Do so on the next start. */
1869 s
->flush_n_restarts
= true;
1871 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
1872 * queue, so that the fd store is possibly gc'ed again */
1873 s
->n_keep_fd_store
--;
1874 unit_add_to_gc_queue(UNIT(s
));
1876 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
1877 s
->forbid_restart
= false;
1879 /* We want fresh tmpdirs in case service is started again immediately */
1880 s
->exec_runtime
= exec_runtime_unref(s
->exec_runtime
, true);
1882 /* Also, remove the runtime directory */
1883 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
1885 /* Get rid of the IPC bits of the user */
1886 unit_unref_uid_gid(UNIT(s
), true);
1888 /* Release the user, and destroy it if we are the only remaining owner */
1889 dynamic_creds_destroy(&s
->dynamic_creds
);
1891 /* Try to delete the pid file. At this point it will be
1892 * out-of-date, and some software might be confused by it, so
1893 * let's remove it. */
1895 (void) unlink(s
->pid_file
);
1897 /* Reset TTY ownership if necessary */
1898 exec_context_revert_tty(&s
->exec_context
);
1903 log_unit_warning_errno(UNIT(s
), r
, "Failed to run install restart timer: %m");
1904 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
1907 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
1911 if (s
->result
== SERVICE_SUCCESS
)
1914 service_unwatch_control_pid(s
);
1915 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1917 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
1918 if (s
->control_command
) {
1919 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
1921 r
= service_spawn(s
,
1923 s
->timeout_stop_usec
,
1924 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
1929 service_set_state(s
, SERVICE_STOP_POST
);
1931 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
1936 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop-post' task: %m");
1937 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
1940 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
1943 case SERVICE_STOP_WATCHDOG
:
1944 case SERVICE_FINAL_WATCHDOG
:
1945 return KILL_WATCHDOG
;
1947 case SERVICE_STOP_SIGTERM
:
1948 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
1949 return KILL_RESTART
;
1952 case SERVICE_FINAL_SIGTERM
:
1953 return KILL_TERMINATE
;
1955 case SERVICE_STOP_SIGKILL
:
1956 case SERVICE_FINAL_SIGKILL
:
1960 return _KILL_OPERATION_INVALID
;
1964 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
1965 int kill_operation
, r
;
1969 if (s
->result
== SERVICE_SUCCESS
)
1972 /* Before sending any signal, make sure we track all members of this cgroup */
1973 (void) unit_watch_all_pids(UNIT(s
));
1975 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
1977 (void) unit_enqueue_rewatch_pids(UNIT(s
));
1979 kill_operation
= state_to_kill_operation(s
, state
);
1980 r
= unit_kill_context(
1991 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
),
1992 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
));
1996 service_set_state(s
, state
);
1997 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
1998 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
1999 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2000 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2001 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
2002 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2004 service_enter_dead(s
, SERVICE_SUCCESS
, true);
2009 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2011 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2012 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
2014 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2017 static void service_enter_stop_by_notify(Service
*s
) {
2020 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2022 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_stop_usec
));
2024 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
2025 service_set_state(s
, SERVICE_STOP_SIGTERM
);
2028 static void service_enter_stop(Service
*s
, ServiceResult f
) {
2033 if (s
->result
== SERVICE_SUCCESS
)
2036 service_unwatch_control_pid(s
);
2037 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2039 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
2040 if (s
->control_command
) {
2041 s
->control_command_id
= SERVICE_EXEC_STOP
;
2043 r
= service_spawn(s
,
2045 s
->timeout_stop_usec
,
2046 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2051 service_set_state(s
, SERVICE_STOP
);
2053 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2058 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'stop' task: %m");
2059 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2062 static bool service_good(Service
*s
) {
2066 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
2069 main_pid_ok
= main_pid_good(s
);
2070 if (main_pid_ok
> 0) /* It's alive */
2072 if (main_pid_ok
== 0) /* It's dead */
2075 /* OK, we don't know anything about the main PID, maybe
2076 * because there is none. Let's check the control group
2079 return cgroup_good(s
) != 0;
2082 static void service_enter_running(Service
*s
, ServiceResult f
) {
2085 if (s
->result
== SERVICE_SUCCESS
)
2088 service_unwatch_control_pid(s
);
2090 if (s
->result
!= SERVICE_SUCCESS
)
2091 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2092 else if (service_good(s
)) {
2094 /* If there are any queued up sd_notify() notifications, process them now */
2095 if (s
->notify_state
== NOTIFY_RELOADING
)
2096 service_enter_reload_by_notify(s
);
2097 else if (s
->notify_state
== NOTIFY_STOPPING
)
2098 service_enter_stop_by_notify(s
);
2100 service_set_state(s
, SERVICE_RUNNING
);
2101 service_arm_timer(s
, service_running_timeout(s
));
2104 } else if (s
->remain_after_exit
)
2105 service_set_state(s
, SERVICE_EXITED
);
2107 service_enter_stop(s
, SERVICE_SUCCESS
);
2110 static void service_enter_start_post(Service
*s
) {
2114 service_unwatch_control_pid(s
);
2115 service_reset_watchdog(s
);
2117 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2118 if (s
->control_command
) {
2119 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2121 r
= service_spawn(s
,
2123 s
->timeout_start_usec
,
2124 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2129 service_set_state(s
, SERVICE_START_POST
);
2131 service_enter_running(s
, SERVICE_SUCCESS
);
2136 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-post' task: %m");
2137 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2140 static void service_kill_control_process(Service
*s
) {
2145 if (s
->control_pid
<= 0)
2148 r
= kill_and_sigcont(s
->control_pid
, SIGKILL
);
2150 _cleanup_free_
char *comm
= NULL
;
2152 (void) get_process_comm(s
->control_pid
, &comm
);
2154 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2155 s
->control_pid
, strna(comm
));
2159 static int service_adverse_to_leftover_processes(Service
*s
) {
2162 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2163 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2164 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2165 * time is quite variable (so Timeout settings aren't of use).
2167 * Here we take these two factors and refuse to start a service if there are existing processes
2168 * within a control group. Databases, while generally having some protection against multiple
2169 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2170 * aren't as rigoriously written to protect aganst against multiple use. */
2172 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2173 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2174 !s
->kill_context
.send_sigkill
)
2175 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2176 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2181 static void service_enter_start(Service
*s
) {
2189 service_unwatch_control_pid(s
);
2190 service_unwatch_main_pid(s
);
2192 r
= service_adverse_to_leftover_processes(s
);
2196 if (s
->type
== SERVICE_FORKING
) {
2197 s
->control_command_id
= SERVICE_EXEC_START
;
2198 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2200 s
->main_command
= NULL
;
2202 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2203 s
->control_command
= NULL
;
2205 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2209 if (s
->type
!= SERVICE_ONESHOT
) {
2210 /* There's no command line configured for the main command? Hmm, that is strange.
2211 * This can only happen if the configuration changes at runtime. In this case,
2212 * let's enter a failure state. */
2213 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2217 /* We force a fake state transition here. Otherwise, the unit would go directly from
2218 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2219 * in between. This way we can later trigger actions that depend on the state
2220 * transition, including SuccessAction=. */
2221 service_set_state(s
, SERVICE_START
);
2223 service_enter_start_post(s
);
2227 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2228 /* For simple + idle this is the main process. We don't apply any timeout here, but
2229 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2230 timeout
= USEC_INFINITY
;
2232 timeout
= s
->timeout_start_usec
;
2234 r
= service_spawn(s
,
2237 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
|EXEC_SETENV_MONITOR_RESULT
,
2242 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2243 /* For simple services we immediately start
2244 * the START_POST binaries. */
2246 (void) service_set_main_pid(s
, pid
);
2247 service_enter_start_post(s
);
2249 } else if (s
->type
== SERVICE_FORKING
) {
2251 /* For forking services we wait until the start
2252 * process exited. */
2254 s
->control_pid
= pid
;
2255 service_set_state(s
, SERVICE_START
);
2257 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_EXEC
)) {
2259 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2261 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2262 * bus. 'notify' and 'exec' services are similar. */
2264 (void) service_set_main_pid(s
, pid
);
2265 service_set_state(s
, SERVICE_START
);
2267 assert_not_reached();
2272 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start' task: %m");
2273 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2276 static void service_enter_start_pre(Service
*s
) {
2281 service_unwatch_control_pid(s
);
2283 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2284 if (s
->control_command
) {
2286 r
= service_adverse_to_leftover_processes(s
);
2290 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2292 r
= service_spawn(s
,
2294 s
->timeout_start_usec
,
2295 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2300 service_set_state(s
, SERVICE_START_PRE
);
2302 service_enter_start(s
);
2307 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'start-pre' task: %m");
2308 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2311 static void service_enter_condition(Service
*s
) {
2316 service_unwatch_control_pid(s
);
2318 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2319 if (s
->control_command
) {
2321 r
= service_adverse_to_leftover_processes(s
);
2325 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2327 r
= service_spawn(s
,
2329 s
->timeout_start_usec
,
2330 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2336 service_set_state(s
, SERVICE_CONDITION
);
2338 service_enter_start_pre(s
);
2343 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'exec-condition' task: %m");
2344 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2347 static void service_enter_restart(Service
*s
) {
2348 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2353 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2354 /* Don't restart things if we are going down anyway */
2355 log_unit_info(UNIT(s
), "Stop job pending for unit, skipping automatic restart.");
2359 /* Any units that are bound to this service must also be
2360 * restarted. We use JOB_RESTART (instead of the more obvious
2361 * JOB_START) here so that those dependency jobs will be added
2363 r
= manager_add_job(UNIT(s
)->manager
, JOB_RESTART
, UNIT(s
), JOB_REPLACE
, NULL
, &error
, NULL
);
2367 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't fully
2368 * stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset the counter
2369 * explicitly however via the usual "systemctl reset-failure" logic. */
2371 s
->flush_n_restarts
= false;
2373 log_unit_struct(UNIT(s
), LOG_INFO
,
2374 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2375 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2376 LOG_UNIT_MESSAGE(UNIT(s
),
2377 "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2378 "N_RESTARTS=%u", s
->n_restarts
);
2380 /* Notify clients about changed restart counter */
2381 unit_add_to_dbus_queue(UNIT(s
));
2383 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2384 * it will be canceled as part of the service_stop() call that
2385 * is executed as part of JOB_RESTART. */
2390 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2391 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, false);
2394 static void service_enter_reload_by_notify(Service
*s
) {
2395 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2400 service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->timeout_start_usec
));
2401 service_set_state(s
, SERVICE_RELOAD
);
2403 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2404 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2406 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2409 static void service_enter_reload(Service
*s
) {
2414 service_unwatch_control_pid(s
);
2415 s
->reload_result
= SERVICE_SUCCESS
;
2417 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2418 if (s
->control_command
) {
2419 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2421 r
= service_spawn(s
,
2423 s
->timeout_start_usec
,
2424 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2429 service_set_state(s
, SERVICE_RELOAD
);
2431 service_enter_running(s
, SERVICE_SUCCESS
);
2436 log_unit_warning_errno(UNIT(s
), r
, "Failed to run 'reload' task: %m");
2437 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2438 service_enter_running(s
, SERVICE_SUCCESS
);
2441 static void service_run_next_control(Service
*s
) {
2446 assert(s
->control_command
);
2447 assert(s
->control_command
->command_next
);
2449 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2451 s
->control_command
= s
->control_command
->command_next
;
2452 service_unwatch_control_pid(s
);
2454 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2455 timeout
= s
->timeout_start_usec
;
2457 timeout
= s
->timeout_stop_usec
;
2459 r
= service_spawn(s
,
2462 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2463 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2464 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2465 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_START
) ? EXEC_SETENV_MONITOR_RESULT
: 0)|
2466 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2474 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next control task: %m");
2476 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2477 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2478 else if (s
->state
== SERVICE_STOP_POST
)
2479 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, true);
2480 else if (s
->state
== SERVICE_RELOAD
) {
2481 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2482 service_enter_running(s
, SERVICE_SUCCESS
);
2484 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2487 static void service_run_next_main(Service
*s
) {
2492 assert(s
->main_command
);
2493 assert(s
->main_command
->command_next
);
2494 assert(s
->type
== SERVICE_ONESHOT
);
2496 s
->main_command
= s
->main_command
->command_next
;
2497 service_unwatch_main_pid(s
);
2499 r
= service_spawn(s
,
2501 s
->timeout_start_usec
,
2502 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_SETENV_MONITOR_RESULT
,
2507 (void) service_set_main_pid(s
, pid
);
2512 log_unit_warning_errno(UNIT(s
), r
, "Failed to run next main task: %m");
2513 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2516 static int service_start(Unit
*u
) {
2517 Service
*s
= SERVICE(u
);
2522 /* We cannot fulfill this request right now, try again later
2524 if (IN_SET(s
->state
,
2525 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2526 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2529 /* Already on it! */
2530 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2533 /* A service that will be restarted must be stopped first to
2534 * trigger BindsTo and/or OnFailure dependencies. If a user
2535 * does not want to wait for the holdoff time to elapse, the
2536 * service should be manually restarted, not started. We
2537 * simply return EAGAIN here, so that any start jobs stay
2538 * queued, and assume that the auto restart timer will
2539 * eventually trigger the restart. */
2540 if (s
->state
== SERVICE_AUTO_RESTART
)
2543 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
));
2545 r
= unit_acquire_invocation_id(u
);
2549 s
->result
= SERVICE_SUCCESS
;
2550 s
->reload_result
= SERVICE_SUCCESS
;
2551 s
->main_pid_known
= false;
2552 s
->main_pid_alien
= false;
2553 s
->forbid_restart
= false;
2555 s
->status_text
= mfree(s
->status_text
);
2556 s
->status_errno
= 0;
2558 s
->notify_state
= NOTIFY_UNKNOWN
;
2560 s
->watchdog_original_usec
= s
->watchdog_usec
;
2561 s
->watchdog_override_enable
= false;
2562 s
->watchdog_override_usec
= USEC_INFINITY
;
2564 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2565 exec_status_reset(&s
->main_exec_status
);
2567 /* This is not an automatic restart? Flush the restart counter then */
2568 if (s
->flush_n_restarts
) {
2570 s
->flush_n_restarts
= false;
2573 u
->reset_accounting
= true;
2575 service_enter_condition(s
);
2579 static int service_stop(Unit
*u
) {
2580 Service
*s
= SERVICE(u
);
2584 /* Don't create restart jobs from manual stops. */
2585 s
->forbid_restart
= true;
2588 if (IN_SET(s
->state
,
2589 SERVICE_STOP
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2590 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))
2593 /* A restart will be scheduled or is in progress. */
2594 if (s
->state
== SERVICE_AUTO_RESTART
) {
2595 service_set_state(s
, SERVICE_DEAD
);
2599 /* If there's already something running we go directly into
2601 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RELOAD
, SERVICE_STOP_WATCHDOG
)) {
2602 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2606 /* If we are currently cleaning, then abort it, brutally. */
2607 if (s
->state
== SERVICE_CLEANING
) {
2608 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2612 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2614 service_enter_stop(s
, SERVICE_SUCCESS
);
2618 static int service_reload(Unit
*u
) {
2619 Service
*s
= SERVICE(u
);
2623 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2625 service_enter_reload(s
);
2629 _pure_
static bool service_can_reload(Unit
*u
) {
2630 Service
*s
= SERVICE(u
);
2634 return !!s
->exec_command
[SERVICE_EXEC_RELOAD
];
2637 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, ExecCommand
*current
) {
2638 Service
*s
= SERVICE(u
);
2640 ExecCommand
*first
, *c
;
2644 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2646 first
= s
->exec_command
[id
];
2648 /* Figure out where we are in the list by walking back to the beginning */
2649 for (c
= current
; c
!= first
; c
= c
->command_prev
)
2655 static int service_serialize_exec_command(Unit
*u
, FILE *f
, ExecCommand
*command
) {
2656 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2657 Service
*s
= SERVICE(u
);
2658 const char *type
, *key
;
2659 ServiceExecCommand id
;
2669 if (command
== s
->control_command
) {
2671 id
= s
->control_command_id
;
2674 id
= SERVICE_EXEC_START
;
2677 idx
= service_exec_command_index(u
, id
, command
);
2679 STRV_FOREACH(arg
, command
->argv
) {
2680 _cleanup_free_
char *e
= NULL
;
2688 if (!GREEDY_REALLOC(args
, length
+ 2 + n
+ 2))
2692 args
[length
++] = ' ';
2694 args
[length
++] = '"';
2695 memcpy(args
+ length
, e
, n
);
2697 args
[length
++] = '"';
2700 if (!GREEDY_REALLOC(args
, length
+ 1))
2705 p
= cescape(command
->path
);
2709 key
= strjoina(type
, "-command");
2710 (void) serialize_item_format(f
, key
, "%s %u %s %s", service_exec_command_to_string(id
), idx
, p
, args
);
2715 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2716 Service
*s
= SERVICE(u
);
2723 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2724 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2725 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2727 if (s
->control_pid
> 0)
2728 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
);
2730 if (s
->main_pid_known
&& s
->main_pid
> 0)
2731 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
);
2733 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2734 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2735 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2737 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2738 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2740 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2744 service_serialize_exec_command(u
, f
, s
->control_command
);
2745 service_serialize_exec_command(u
, f
, s
->main_command
);
2747 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2750 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2753 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2757 if (s
->exec_fd_event_source
) {
2758 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2762 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2765 if (UNIT_ISSET(s
->accept_socket
)) {
2766 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2771 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
2775 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
2776 _cleanup_free_
char *c
= NULL
;
2779 copy
= fdset_put_dup(fds
, fs
->fd
);
2781 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
2783 c
= cescape(fs
->fdname
);
2787 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
2790 if (s
->main_exec_status
.pid
> 0) {
2791 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
2792 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
2793 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
2795 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
2796 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
2797 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
2801 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
2802 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
2804 if (s
->watchdog_override_enable
)
2805 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
2807 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
2808 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
2813 int service_deserialize_exec_command(
2816 const char *value
) {
2818 Service
*s
= SERVICE(u
);
2820 unsigned idx
= 0, i
;
2821 bool control
, found
= false;
2822 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
2823 ExecCommand
*command
= NULL
;
2824 _cleanup_free_
char *path
= NULL
;
2825 _cleanup_strv_free_
char **argv
= NULL
;
2827 enum ExecCommandState
{
2828 STATE_EXEC_COMMAND_TYPE
,
2829 STATE_EXEC_COMMAND_INDEX
,
2830 STATE_EXEC_COMMAND_PATH
,
2831 STATE_EXEC_COMMAND_ARGS
,
2832 _STATE_EXEC_COMMAND_MAX
,
2833 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
2840 control
= streq(key
, "control-command");
2842 state
= STATE_EXEC_COMMAND_TYPE
;
2845 _cleanup_free_
char *arg
= NULL
;
2847 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
2854 case STATE_EXEC_COMMAND_TYPE
:
2855 id
= service_exec_command_from_string(arg
);
2859 state
= STATE_EXEC_COMMAND_INDEX
;
2861 case STATE_EXEC_COMMAND_INDEX
:
2862 r
= safe_atou(arg
, &idx
);
2866 state
= STATE_EXEC_COMMAND_PATH
;
2868 case STATE_EXEC_COMMAND_PATH
:
2869 path
= TAKE_PTR(arg
);
2870 state
= STATE_EXEC_COMMAND_ARGS
;
2872 case STATE_EXEC_COMMAND_ARGS
:
2873 r
= strv_extend(&argv
, arg
);
2878 assert_not_reached();
2882 if (state
!= STATE_EXEC_COMMAND_ARGS
)
2884 if (strv_isempty(argv
))
2885 return -EINVAL
; /* At least argv[0] must be always present. */
2887 /* Let's check whether exec command on given offset matches data that we just deserialized */
2888 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
2892 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
2897 /* Command at the index we serialized is different, let's look for command that exactly
2898 * matches but is on different index. If there is no such command we will not resume execution. */
2899 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
2900 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
2904 if (command
&& control
) {
2905 s
->control_command
= command
;
2906 s
->control_command_id
= id
;
2908 s
->main_command
= command
;
2910 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
2915 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
2916 Service
*s
= SERVICE(u
);
2924 if (streq(key
, "state")) {
2927 state
= service_state_from_string(value
);
2929 log_unit_debug(u
, "Failed to parse state value: %s", value
);
2931 s
->deserialized_state
= state
;
2932 } else if (streq(key
, "result")) {
2935 f
= service_result_from_string(value
);
2937 log_unit_debug(u
, "Failed to parse result value: %s", value
);
2938 else if (f
!= SERVICE_SUCCESS
)
2941 } else if (streq(key
, "reload-result")) {
2944 f
= service_result_from_string(value
);
2946 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
2947 else if (f
!= SERVICE_SUCCESS
)
2948 s
->reload_result
= f
;
2950 } else if (streq(key
, "control-pid")) {
2953 if (parse_pid(value
, &pid
) < 0)
2954 log_unit_debug(u
, "Failed to parse control-pid value: %s", value
);
2956 s
->control_pid
= pid
;
2957 } else if (streq(key
, "main-pid")) {
2960 if (parse_pid(value
, &pid
) < 0)
2961 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
2963 (void) service_set_main_pid(s
, pid
);
2964 } else if (streq(key
, "main-pid-known")) {
2967 b
= parse_boolean(value
);
2969 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
2971 s
->main_pid_known
= b
;
2972 } else if (streq(key
, "bus-name-good")) {
2975 b
= parse_boolean(value
);
2977 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
2979 s
->bus_name_good
= b
;
2980 } else if (streq(key
, "bus-name-owner")) {
2981 r
= free_and_strdup(&s
->bus_name_owner
, value
);
2983 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
2984 } else if (streq(key
, "status-text")) {
2988 l
= cunescape(value
, 0, &t
);
2990 log_unit_debug_errno(u
, l
, "Failed to unescape status text '%s': %m", value
);
2992 free_and_replace(s
->status_text
, t
);
2994 } else if (streq(key
, "accept-socket")) {
2997 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
2999 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
3001 unit_ref_set(&s
->accept_socket
, u
, socket
);
3002 SOCKET(socket
)->n_connections
++;
3005 } else if (streq(key
, "socket-fd")) {
3008 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3009 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
3011 asynchronous_close(s
->socket_fd
);
3012 s
->socket_fd
= fdset_remove(fds
, fd
);
3014 } else if (streq(key
, "fd-store-fd")) {
3015 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
3019 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
3020 if (r
<= 0 || safe_atoi(fdv
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
)) {
3021 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3025 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3027 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3031 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
3033 /* If the value is not present, we assume the default */
3035 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
3036 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
3040 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
3042 log_unit_error_errno(u
, r
, "Failed to add fd to store: %m");
3044 fdset_remove(fds
, fd
);
3045 } else if (streq(key
, "main-exec-status-pid")) {
3048 if (parse_pid(value
, &pid
) < 0)
3049 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
3051 s
->main_exec_status
.pid
= pid
;
3052 } else if (streq(key
, "main-exec-status-code")) {
3055 if (safe_atoi(value
, &i
) < 0)
3056 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
3058 s
->main_exec_status
.code
= i
;
3059 } else if (streq(key
, "main-exec-status-status")) {
3062 if (safe_atoi(value
, &i
) < 0)
3063 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3065 s
->main_exec_status
.status
= i
;
3066 } else if (streq(key
, "main-exec-status-start"))
3067 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3068 else if (streq(key
, "main-exec-status-exit"))
3069 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3070 else if (streq(key
, "watchdog-timestamp"))
3071 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3072 else if (streq(key
, "forbid-restart")) {
3075 b
= parse_boolean(value
);
3077 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3079 s
->forbid_restart
= b
;
3080 } else if (streq(key
, "stdin-fd")) {
3083 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3084 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3086 asynchronous_close(s
->stdin_fd
);
3087 s
->stdin_fd
= fdset_remove(fds
, fd
);
3088 s
->exec_context
.stdio_as_fds
= true;
3090 } else if (streq(key
, "stdout-fd")) {
3093 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3094 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3096 asynchronous_close(s
->stdout_fd
);
3097 s
->stdout_fd
= fdset_remove(fds
, fd
);
3098 s
->exec_context
.stdio_as_fds
= true;
3100 } else if (streq(key
, "stderr-fd")) {
3103 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3104 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3106 asynchronous_close(s
->stderr_fd
);
3107 s
->stderr_fd
= fdset_remove(fds
, fd
);
3108 s
->exec_context
.stdio_as_fds
= true;
3110 } else if (streq(key
, "exec-fd")) {
3113 if (safe_atoi(value
, &fd
) < 0 || fd
< 0 || !fdset_contains(fds
, fd
))
3114 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3116 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3118 fd
= fdset_remove(fds
, fd
);
3119 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3122 } else if (streq(key
, "watchdog-override-usec")) {
3123 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3124 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3126 s
->watchdog_override_enable
= true;
3128 } else if (streq(key
, "watchdog-original-usec")) {
3129 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3130 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3132 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3133 r
= service_deserialize_exec_command(u
, key
, value
);
3135 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3137 } else if (streq(key
, "n-restarts")) {
3138 r
= safe_atou(value
, &s
->n_restarts
);
3140 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3142 } else if (streq(key
, "flush-n-restarts")) {
3143 r
= parse_boolean(value
);
3145 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3147 s
->flush_n_restarts
= r
;
3149 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3154 _pure_
static UnitActiveState
service_active_state(Unit
*u
) {
3155 const UnitActiveState
*table
;
3159 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3161 return table
[SERVICE(u
)->state
];
3164 static const char *service_sub_state_to_string(Unit
*u
) {
3167 return service_state_to_string(SERVICE(u
)->state
);
3170 static bool service_may_gc(Unit
*u
) {
3171 Service
*s
= SERVICE(u
);
3175 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3176 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3177 * have moved outside of the cgroup. */
3179 if (main_pid_good(s
) > 0 ||
3180 control_pid_good(s
) > 0)
3186 static int service_retry_pid_file(Service
*s
) {
3189 assert(s
->pid_file
);
3190 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3192 r
= service_load_pid_file(s
, false);
3196 service_unwatch_pid_file(s
);
3198 service_enter_running(s
, SERVICE_SUCCESS
);
3202 static int service_watch_pid_file(Service
*s
) {
3205 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3207 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3211 /* the pidfile might have appeared just before we set the watch */
3212 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3213 service_retry_pid_file(s
);
3217 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3218 service_unwatch_pid_file(s
);
3222 static int service_demand_pid_file(Service
*s
) {
3225 assert(s
->pid_file
);
3226 assert(!s
->pid_file_pathspec
);
3228 ps
= new0(PathSpec
, 1);
3233 ps
->path
= strdup(s
->pid_file
);
3239 path_simplify(ps
->path
);
3241 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
3242 * keep their PID file open all the time. */
3243 ps
->type
= PATH_MODIFIED
;
3244 ps
->inotify_fd
= -EBADF
;
3246 s
->pid_file_pathspec
= ps
;
3248 return service_watch_pid_file(s
);
3251 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3252 PathSpec
*p
= ASSERT_PTR(userdata
);
3255 s
= SERVICE(p
->unit
);
3259 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3260 assert(s
->pid_file_pathspec
);
3261 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3263 log_unit_debug(UNIT(s
), "inotify event");
3265 if (path_spec_fd_event(p
, events
) < 0)
3268 if (service_retry_pid_file(s
) == 0)
3271 if (service_watch_pid_file(s
) < 0)
3277 service_unwatch_pid_file(s
);
3278 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3282 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3283 Service
*s
= SERVICE(userdata
);
3287 log_unit_debug(UNIT(s
), "got exec-fd event");
3289 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3290 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3291 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3292 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3293 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3294 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3295 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3296 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3302 n
= read(fd
, &x
, sizeof(x
));
3304 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3307 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3309 if (n
== 0) { /* EOF → the event we are waiting for */
3311 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3313 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3314 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3316 s
->exec_fd_hot
= false;
3318 /* Nice! This is what we have been waiting for. Transition to next state. */
3319 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3320 service_enter_start_post(s
);
3322 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3327 /* A byte was read → this turns on/off the exec fd logic */
3328 assert(n
== sizeof(x
));
3335 static void service_notify_cgroup_empty_event(Unit
*u
) {
3336 Service
*s
= SERVICE(u
);
3340 log_unit_debug(u
, "Control group is empty.");
3344 /* Waiting for SIGCHLD is usually more interesting,
3345 * because it includes return codes/signals. Which is
3346 * why we ignore the cgroup events for most cases,
3347 * except when we don't know pid which to expect the
3351 if (s
->type
== SERVICE_NOTIFY
&&
3352 main_pid_good(s
) == 0 &&
3353 control_pid_good(s
) == 0) {
3354 /* No chance of getting a ready notification anymore */
3355 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3359 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& main_pid_good(s
) <= 0)
3360 service_enter_start_post(s
);
3363 case SERVICE_START_POST
:
3364 if (s
->pid_file_pathspec
&&
3365 main_pid_good(s
) == 0 &&
3366 control_pid_good(s
) == 0) {
3368 /* Give up hoping for the daemon to write its PID file */
3369 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3371 service_unwatch_pid_file(s
);
3372 if (s
->state
== SERVICE_START
)
3373 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3375 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3379 case SERVICE_RUNNING
:
3380 /* service_enter_running() will figure out what to do */
3381 service_enter_running(s
, SERVICE_SUCCESS
);
3384 case SERVICE_STOP_WATCHDOG
:
3385 case SERVICE_STOP_SIGTERM
:
3386 case SERVICE_STOP_SIGKILL
:
3388 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3389 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3393 case SERVICE_STOP_POST
:
3394 case SERVICE_FINAL_WATCHDOG
:
3395 case SERVICE_FINAL_SIGTERM
:
3396 case SERVICE_FINAL_SIGKILL
:
3397 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3398 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3402 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3403 * up the cgroup earlier and should do it now. */
3405 case SERVICE_FAILED
:
3406 unit_prune_cgroup(u
);
3414 static void service_notify_cgroup_oom_event(Unit
*u
, bool managed_oom
) {
3415 Service
*s
= SERVICE(u
);
3418 log_unit_debug(u
, "Process(es) of control group were killed by systemd-oomd.");
3420 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3422 if (s
->oom_policy
== OOM_CONTINUE
)
3427 case SERVICE_CONDITION
:
3428 case SERVICE_START_PRE
:
3430 case SERVICE_START_POST
:
3432 if (s
->oom_policy
== OOM_STOP
)
3433 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3434 else if (s
->oom_policy
== OOM_KILL
)
3435 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3439 case SERVICE_EXITED
:
3440 case SERVICE_RUNNING
:
3441 if (s
->oom_policy
== OOM_STOP
)
3442 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3443 else if (s
->oom_policy
== OOM_KILL
)
3444 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3448 case SERVICE_STOP_WATCHDOG
:
3449 case SERVICE_STOP_SIGTERM
:
3450 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3453 case SERVICE_STOP_SIGKILL
:
3454 case SERVICE_FINAL_SIGKILL
:
3455 if (s
->result
== SERVICE_SUCCESS
)
3456 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3459 case SERVICE_STOP_POST
:
3460 case SERVICE_FINAL_SIGTERM
:
3461 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3469 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3470 bool notify_dbus
= true;
3471 Service
*s
= SERVICE(u
);
3473 ExitClean clean_mode
;
3478 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3479 * considered daemons as they are typically not long running. */
3480 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3481 clean_mode
= EXIT_CLEAN_COMMAND
;
3483 clean_mode
= EXIT_CLEAN_DAEMON
;
3485 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3486 f
= SERVICE_SUCCESS
;
3487 else if (code
== CLD_EXITED
)
3488 f
= SERVICE_FAILURE_EXIT_CODE
;
3489 else if (code
== CLD_KILLED
)
3490 f
= SERVICE_FAILURE_SIGNAL
;
3491 else if (code
== CLD_DUMPED
)
3492 f
= SERVICE_FAILURE_CORE_DUMP
;
3494 assert_not_reached();
3496 if (s
->main_pid
== pid
) {
3497 /* Clean up the exec_fd event source. We want to do this here, not later in
3498 * service_set_state(), because service_enter_stop_post() calls service_spawn().
3499 * The source owns its end of the pipe, so this will close that too. */
3500 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3502 /* Forking services may occasionally move to a new PID.
3503 * As long as they update the PID file before exiting the old
3504 * PID, they're fine. */
3505 if (service_load_pid_file(s
, false) > 0)
3509 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3511 if (s
->main_command
) {
3512 /* If this is not a forking service than the
3513 * main process got started and hence we copy
3514 * the exit status so that it is recorded both
3515 * as main and as control process exit
3518 s
->main_command
->exec_status
= s
->main_exec_status
;
3520 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3521 f
= SERVICE_SUCCESS
;
3522 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3524 /* If this is a forked process, then we should
3525 * ignore the return value if this was
3526 * configured for the starter process */
3528 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3529 f
= SERVICE_SUCCESS
;
3532 unit_log_process_exit(
3535 service_exec_command_to_string(SERVICE_EXEC_START
),
3536 f
== SERVICE_SUCCESS
,
3539 if (s
->result
== SERVICE_SUCCESS
)
3542 if (s
->main_command
&&
3543 s
->main_command
->command_next
&&
3544 s
->type
== SERVICE_ONESHOT
&&
3545 f
== SERVICE_SUCCESS
) {
3547 /* There is another command to execute, so let's do that. */
3549 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3550 service_run_next_main(s
);
3553 s
->main_command
= NULL
;
3555 /* Services with ExitType=cgroup do not act on main PID exiting,
3556 * unless the cgroup is already empty */
3557 if (s
->exit_type
== SERVICE_EXIT_MAIN
|| cgroup_good(s
) <= 0) {
3558 /* The service exited, so the service is officially gone. */
3561 case SERVICE_START_POST
:
3562 case SERVICE_RELOAD
:
3563 /* If neither main nor control processes are running then
3564 * the current state can never exit cleanly, hence immediately
3565 * terminate the service. */
3566 if (control_pid_good(s
) <= 0)
3567 service_enter_stop(s
, f
);
3569 /* Otherwise need to wait until the operation is done. */
3573 /* Need to wait until the operation is done. */
3577 if (s
->type
== SERVICE_ONESHOT
) {
3578 /* This was our main goal, so let's go on */
3579 if (f
== SERVICE_SUCCESS
)
3580 service_enter_start_post(s
);
3582 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3584 } else if (s
->type
== SERVICE_NOTIFY
) {
3585 /* Only enter running through a notification, so that the
3586 * SERVICE_START state signifies that no ready notification
3587 * has been received */
3588 if (f
!= SERVICE_SUCCESS
)
3589 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3590 else if (!s
->remain_after_exit
|| s
->notify_access
== NOTIFY_MAIN
)
3591 /* The service has never been and will never be active */
3592 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3597 case SERVICE_RUNNING
:
3598 service_enter_running(s
, f
);
3601 case SERVICE_STOP_WATCHDOG
:
3602 case SERVICE_STOP_SIGTERM
:
3603 case SERVICE_STOP_SIGKILL
:
3605 if (control_pid_good(s
) <= 0)
3606 service_enter_stop_post(s
, f
);
3608 /* If there is still a control process, wait for that first */
3611 case SERVICE_STOP_POST
:
3613 if (control_pid_good(s
) <= 0)
3614 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3618 case SERVICE_FINAL_WATCHDOG
:
3619 case SERVICE_FINAL_SIGTERM
:
3620 case SERVICE_FINAL_SIGKILL
:
3622 if (control_pid_good(s
) <= 0)
3623 service_enter_dead(s
, f
, true);
3627 assert_not_reached();
3632 } else if (s
->control_pid
== pid
) {
3638 if (s
->control_command
) {
3639 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3641 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3642 f
= SERVICE_SUCCESS
;
3645 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3646 if (s
->state
== SERVICE_CONDITION
) {
3647 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3648 UNIT(s
)->condition_result
= false;
3649 f
= SERVICE_SKIP_CONDITION
;
3651 } else if (f
== SERVICE_SUCCESS
) {
3652 UNIT(s
)->condition_result
= true;
3657 kind
= "Condition check process";
3659 kind
= "Control process";
3660 success
= f
== SERVICE_SUCCESS
;
3663 unit_log_process_exit(
3666 service_exec_command_to_string(s
->control_command_id
),
3670 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3673 if (s
->control_command
&&
3674 s
->control_command
->command_next
&&
3675 f
== SERVICE_SUCCESS
) {
3677 /* There is another command to *
3678 * execute, so let's do that. */
3680 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3681 service_run_next_control(s
);
3684 /* No further commands for this step, so let's
3685 * figure out what to do next */
3687 s
->control_command
= NULL
;
3688 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3690 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3694 case SERVICE_CONDITION
:
3695 if (f
== SERVICE_SUCCESS
)
3696 service_enter_start_pre(s
);
3698 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3701 case SERVICE_START_PRE
:
3702 if (f
== SERVICE_SUCCESS
)
3703 service_enter_start(s
);
3705 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3709 if (s
->type
!= SERVICE_FORKING
)
3710 /* Maybe spurious event due to a reload that changed the type? */
3713 if (f
!= SERVICE_SUCCESS
) {
3714 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3719 bool has_start_post
;
3722 /* Let's try to load the pid file here if we can.
3723 * The PID file might actually be created by a START_POST
3724 * script. In that case don't worry if the loading fails. */
3726 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3727 r
= service_load_pid_file(s
, !has_start_post
);
3728 if (!has_start_post
&& r
< 0) {
3729 r
= service_demand_pid_file(s
);
3730 if (r
< 0 || cgroup_good(s
) == 0)
3731 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3735 service_search_main_pid(s
);
3737 service_enter_start_post(s
);
3740 case SERVICE_START_POST
:
3741 if (f
!= SERVICE_SUCCESS
) {
3742 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3749 r
= service_load_pid_file(s
, true);
3751 r
= service_demand_pid_file(s
);
3752 if (r
< 0 || cgroup_good(s
) == 0)
3753 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3757 service_search_main_pid(s
);
3759 service_enter_running(s
, SERVICE_SUCCESS
);
3762 case SERVICE_RELOAD
:
3763 if (f
== SERVICE_SUCCESS
)
3764 if (service_load_pid_file(s
, true) < 0)
3765 service_search_main_pid(s
);
3767 s
->reload_result
= f
;
3768 service_enter_running(s
, SERVICE_SUCCESS
);
3772 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3775 case SERVICE_STOP_WATCHDOG
:
3776 case SERVICE_STOP_SIGTERM
:
3777 case SERVICE_STOP_SIGKILL
:
3778 if (main_pid_good(s
) <= 0)
3779 service_enter_stop_post(s
, f
);
3781 /* If there is still a service process around, wait until
3782 * that one quit, too */
3785 case SERVICE_STOP_POST
:
3786 if (main_pid_good(s
) <= 0)
3787 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3790 case SERVICE_FINAL_WATCHDOG
:
3791 case SERVICE_FINAL_SIGTERM
:
3792 case SERVICE_FINAL_SIGKILL
:
3793 if (main_pid_good(s
) <= 0)
3794 service_enter_dead(s
, f
, true);
3797 case SERVICE_CLEANING
:
3799 if (s
->clean_result
== SERVICE_SUCCESS
)
3800 s
->clean_result
= f
;
3802 service_enter_dead(s
, SERVICE_SUCCESS
, false);
3806 assert_not_reached();
3809 } else /* Neither control nor main PID? If so, don't notify about anything */
3810 notify_dbus
= false;
3812 /* Notify clients about changed exit status */
3814 unit_add_to_dbus_queue(u
);
3816 /* We watch the main/control process otherwise we can't retrieve the unit they
3817 * belong to with cgroupv1. But if they are not our direct child, we won't get a
3818 * SIGCHLD for them. Therefore we need to look for others to watch so we can
3819 * detect when the cgroup becomes empty. Note that the control process is always
3820 * our child so it's pointless to watch all other processes. */
3821 if (!control_pid_good(s
))
3822 if (!s
->main_pid_known
|| s
->main_pid_alien
)
3823 (void) unit_enqueue_rewatch_pids(u
);
3826 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
3827 Service
*s
= SERVICE(userdata
);
3830 assert(source
== s
->timer_event_source
);
3834 case SERVICE_CONDITION
:
3835 case SERVICE_START_PRE
:
3837 case SERVICE_START_POST
:
3838 switch (s
->timeout_start_failure_mode
) {
3840 case SERVICE_TIMEOUT_TERMINATE
:
3841 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
3842 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3845 case SERVICE_TIMEOUT_ABORT
:
3846 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
3847 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3850 case SERVICE_TIMEOUT_KILL
:
3851 if (s
->kill_context
.send_sigkill
) {
3852 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
3853 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3855 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
3856 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3861 assert_not_reached();
3865 case SERVICE_RUNNING
:
3866 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
3867 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
3870 case SERVICE_RELOAD
:
3871 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
3872 service_kill_control_process(s
);
3873 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
3874 service_enter_running(s
, SERVICE_SUCCESS
);
3878 switch (s
->timeout_stop_failure_mode
) {
3880 case SERVICE_TIMEOUT_TERMINATE
:
3881 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
3882 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3885 case SERVICE_TIMEOUT_ABORT
:
3886 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
3887 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3890 case SERVICE_TIMEOUT_KILL
:
3891 if (s
->kill_context
.send_sigkill
) {
3892 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
3893 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3895 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
3896 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3901 assert_not_reached();
3905 case SERVICE_STOP_WATCHDOG
:
3906 if (s
->kill_context
.send_sigkill
) {
3907 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
3908 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3910 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
3911 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3915 case SERVICE_STOP_SIGTERM
:
3916 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3917 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
3918 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3919 } else if (s
->kill_context
.send_sigkill
) {
3920 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
3921 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3923 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
3924 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3929 case SERVICE_STOP_SIGKILL
:
3930 /* Uh, we sent a SIGKILL and it is still not gone?
3931 * Must be something we cannot kill, so let's just be
3932 * weirded out and continue */
3934 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
3935 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
3938 case SERVICE_STOP_POST
:
3939 switch (s
->timeout_stop_failure_mode
) {
3941 case SERVICE_TIMEOUT_TERMINATE
:
3942 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
3943 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
3946 case SERVICE_TIMEOUT_ABORT
:
3947 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
3948 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3951 case SERVICE_TIMEOUT_KILL
:
3952 if (s
->kill_context
.send_sigkill
) {
3953 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
3954 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3956 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
3957 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3962 assert_not_reached();
3966 case SERVICE_FINAL_WATCHDOG
:
3967 if (s
->kill_context
.send_sigkill
) {
3968 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
3969 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3971 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
3972 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3976 case SERVICE_FINAL_SIGTERM
:
3977 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
3978 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
3979 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
3980 } else if (s
->kill_context
.send_sigkill
) {
3981 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
3982 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
3984 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
3985 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
3990 case SERVICE_FINAL_SIGKILL
:
3991 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
3992 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
3995 case SERVICE_AUTO_RESTART
:
3996 if (s
->restart_usec
> 0)
3997 log_unit_debug(UNIT(s
),
3998 "Service RestartSec=%s expired, scheduling restart.",
3999 FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
));
4001 log_unit_debug(UNIT(s
),
4002 "Service has no hold-off time (RestartSec=0), scheduling restart.");
4004 service_enter_restart(s
);
4007 case SERVICE_CLEANING
:
4008 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
4010 if (s
->clean_result
== SERVICE_SUCCESS
)
4011 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
4013 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
4017 assert_not_reached();
4023 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4024 Service
*s
= SERVICE(userdata
);
4025 usec_t watchdog_usec
;
4028 assert(source
== s
->watchdog_event_source
);
4030 watchdog_usec
= service_get_watchdog_usec(s
);
4032 if (UNIT(s
)->manager
->service_watchdogs
) {
4033 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
4034 FORMAT_TIMESPAN(watchdog_usec
, 1));
4036 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4038 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
4039 FORMAT_TIMESPAN(watchdog_usec
, 1));
4044 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
4047 if (s
->notify_access
== NOTIFY_NONE
) {
4048 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
4052 if (s
->notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
) {
4053 if (s
->main_pid
!= 0)
4054 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
);
4056 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
);
4061 if (s
->notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
&& pid
!= s
->control_pid
) {
4062 if (s
->main_pid
!= 0 && s
->control_pid
!= 0)
4063 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
,
4064 pid
, s
->main_pid
, s
->control_pid
);
4065 else if (s
->main_pid
!= 0)
4066 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
);
4067 else if (s
->control_pid
!= 0)
4068 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
);
4070 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
);
4078 static void service_force_watchdog(Service
*s
) {
4079 if (!UNIT(s
)->manager
->service_watchdogs
)
4082 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
4083 s
->status_text
? s
->status_text
: "<unset>");
4085 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4088 static void service_notify_message(
4090 const struct ucred
*ucred
,
4094 Service
*s
= SERVICE(u
);
4095 bool notify_dbus
= false;
4102 if (!service_notify_message_authorized(SERVICE(u
), ucred
->pid
, fds
))
4105 if (DEBUG_LOGGING
) {
4106 _cleanup_free_
char *cc
= NULL
;
4108 cc
= strv_join(tags
, ", ");
4109 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, isempty(cc
) ? "n/a" : cc
);
4112 /* Interpret MAINPID= */
4113 e
= strv_find_startswith(tags
, "MAINPID=");
4114 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
)) {
4117 if (parse_pid(e
, &new_main_pid
) < 0)
4118 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4119 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
) {
4121 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4123 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4125 if (ucred
->uid
== 0) {
4126 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
);
4129 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4132 (void) service_set_main_pid(s
, new_main_pid
);
4134 r
= unit_watch_pid(UNIT(s
), new_main_pid
, false);
4136 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4143 /* Interpret READY=/STOPPING=/RELOADING=. Last one wins. */
4144 STRV_FOREACH_BACKWARDS(i
, tags
) {
4146 if (streq(*i
, "READY=1")) {
4147 s
->notify_state
= NOTIFY_READY
;
4149 /* Type=notify services inform us about completed
4150 * initialization with READY=1 */
4151 if (s
->type
== SERVICE_NOTIFY
&& s
->state
== SERVICE_START
)
4152 service_enter_start_post(s
);
4154 /* Sending READY=1 while we are reloading informs us
4155 * that the reloading is complete */
4156 if (s
->state
== SERVICE_RELOAD
&& s
->control_pid
== 0)
4157 service_enter_running(s
, SERVICE_SUCCESS
);
4162 } else if (streq(*i
, "RELOADING=1")) {
4163 s
->notify_state
= NOTIFY_RELOADING
;
4165 if (s
->state
== SERVICE_RUNNING
)
4166 service_enter_reload_by_notify(s
);
4171 } else if (streq(*i
, "STOPPING=1")) {
4172 s
->notify_state
= NOTIFY_STOPPING
;
4174 if (s
->state
== SERVICE_RUNNING
)
4175 service_enter_stop_by_notify(s
);
4182 /* Interpret STATUS= */
4183 e
= strv_find_startswith(tags
, "STATUS=");
4185 _cleanup_free_
char *t
= NULL
;
4188 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4189 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4190 if (strlen(e
) > STATUS_TEXT_MAX
)
4191 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4192 else if (!utf8_is_valid(e
))
4193 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4201 if (!streq_ptr(s
->status_text
, t
)) {
4202 free_and_replace(s
->status_text
, t
);
4207 /* Interpret ERRNO= */
4208 e
= strv_find_startswith(tags
, "ERRNO=");
4212 status_errno
= parse_errno(e
);
4213 if (status_errno
< 0)
4214 log_unit_warning_errno(u
, status_errno
,
4215 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4216 else if (s
->status_errno
!= status_errno
) {
4217 s
->status_errno
= status_errno
;
4222 /* Interpret EXTEND_TIMEOUT= */
4223 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4225 usec_t extend_timeout_usec
;
4226 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4227 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4229 service_extend_timeout(s
, extend_timeout_usec
);
4232 /* Interpret WATCHDOG= */
4233 e
= strv_find_startswith(tags
, "WATCHDOG=");
4236 service_reset_watchdog(s
);
4237 else if (streq(e
, "trigger"))
4238 service_force_watchdog(s
);
4240 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4243 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4245 usec_t watchdog_override_usec
;
4246 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4247 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4249 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4252 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4253 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4254 * fds, but optional when pushing in new fds, for compatibility reasons. */
4255 if (strv_contains(tags
, "FDSTOREREMOVE=1")) {
4258 name
= strv_find_startswith(tags
, "FDNAME=");
4259 if (!name
|| !fdname_is_valid(name
))
4260 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4262 service_remove_fd_store(s
, name
);
4264 } else if (strv_contains(tags
, "FDSTORE=1")) {
4267 name
= strv_find_startswith(tags
, "FDNAME=");
4268 if (name
&& !fdname_is_valid(name
)) {
4269 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4273 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4276 /* Notify clients about changed status or main pid */
4278 unit_add_to_dbus_queue(u
);
4281 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4282 Service
*s
= SERVICE(u
);
4286 if (!s
->timer_event_source
)
4289 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4292 if (t
== USEC_INFINITY
)
4299 static bool pick_up_pid_from_bus_name(Service
*s
) {
4302 /* If the service is running but we have no main PID yet, get it from the owner of the D-Bus name */
4304 return !pid_is_valid(s
->main_pid
) &&
4312 static int bus_name_pid_lookup_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*ret_error
) {
4313 const sd_bus_error
*e
;
4314 Unit
*u
= ASSERT_PTR(userdata
);
4322 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4324 if (!s
->bus_name
|| !pick_up_pid_from_bus_name(s
))
4327 e
= sd_bus_message_get_error(reply
);
4329 r
= sd_bus_error_get_errno(e
);
4330 log_warning_errno(r
, "GetConnectionUnixProcessID() failed: %s", bus_error_message(e
, r
));
4334 r
= sd_bus_message_read(reply
, "u", &pid
);
4336 bus_log_parse_error(r
);
4340 if (!pid_is_valid(pid
)) {
4341 log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "GetConnectionUnixProcessID() returned invalid PID");
4345 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, (pid_t
) pid
);
4347 (void) service_set_main_pid(s
, pid
);
4348 (void) unit_watch_pid(UNIT(s
), pid
, false);
4352 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4354 Service
*s
= SERVICE(u
);
4360 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4362 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4364 s
->bus_name_good
= new_owner
;
4366 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4367 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4369 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4373 if (s
->type
== SERVICE_DBUS
) {
4375 /* service_enter_running() will figure out what to
4377 if (s
->state
== SERVICE_RUNNING
)
4378 service_enter_running(s
, SERVICE_SUCCESS
);
4379 else if (s
->state
== SERVICE_START
&& new_owner
)
4380 service_enter_start_post(s
);
4382 } else if (new_owner
&& pick_up_pid_from_bus_name(s
)) {
4384 /* Try to acquire PID from bus service */
4386 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4388 r
= sd_bus_call_method_async(
4389 u
->manager
->api_bus
,
4390 &s
->bus_name_pid_lookup_slot
,
4391 "org.freedesktop.DBus",
4392 "/org/freedesktop/DBus",
4393 "org.freedesktop.DBus",
4394 "GetConnectionUnixProcessID",
4395 bus_name_pid_lookup_callback
,
4400 log_debug_errno(r
, "Failed to request owner PID of service name, ignoring: %m");
4404 int service_set_socket_fd(
4409 bool selinux_context_net
) {
4411 _cleanup_free_
char *peer_text
= NULL
;
4417 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4418 * to be configured. We take ownership of the passed fd on success. */
4420 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4423 if (s
->socket_fd
>= 0)
4426 assert(!s
->socket_peer
);
4428 if (s
->state
!= SERVICE_DEAD
)
4431 if (getpeername_pretty(fd
, true, &peer_text
) >= 0) {
4433 if (UNIT(s
)->description
) {
4434 _cleanup_free_
char *a
= NULL
;
4436 a
= strjoin(UNIT(s
)->description
, " (", peer_text
, ")");
4440 r
= unit_set_description(UNIT(s
), a
);
4442 r
= unit_set_description(UNIT(s
), peer_text
);
4447 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4452 s
->socket_peer
= socket_peer_ref(peer
);
4453 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4455 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4459 static void service_reset_failed(Unit
*u
) {
4460 Service
*s
= SERVICE(u
);
4464 if (s
->state
== SERVICE_FAILED
)
4465 service_set_state(s
, SERVICE_DEAD
);
4467 s
->result
= SERVICE_SUCCESS
;
4468 s
->reload_result
= SERVICE_SUCCESS
;
4469 s
->clean_result
= SERVICE_SUCCESS
;
4471 s
->flush_n_restarts
= false;
4474 static int service_kill(Unit
*u
, KillWho who
, int signo
, sd_bus_error
*error
) {
4475 Service
*s
= SERVICE(u
);
4479 return unit_kill_common(u
, who
, signo
, s
->main_pid
, s
->control_pid
, error
);
4482 static int service_main_pid(Unit
*u
) {
4483 Service
*s
= SERVICE(u
);
4490 static int service_control_pid(Unit
*u
) {
4491 Service
*s
= SERVICE(u
);
4495 return s
->control_pid
;
4498 static bool service_needs_console(Unit
*u
) {
4499 Service
*s
= SERVICE(u
);
4503 /* We provide our own implementation of this here, instead of relying of the generic implementation
4504 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4506 if (!exec_context_may_touch_console(&s
->exec_context
))
4509 return IN_SET(s
->state
,
4517 SERVICE_STOP_WATCHDOG
,
4518 SERVICE_STOP_SIGTERM
,
4519 SERVICE_STOP_SIGKILL
,
4521 SERVICE_FINAL_WATCHDOG
,
4522 SERVICE_FINAL_SIGTERM
,
4523 SERVICE_FINAL_SIGKILL
);
4526 static int service_exit_status(Unit
*u
) {
4527 Service
*s
= SERVICE(u
);
4531 if (s
->main_exec_status
.pid
<= 0 ||
4532 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4535 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4538 return s
->main_exec_status
.status
;
4541 static const char* service_status_text(Unit
*u
) {
4542 Service
*s
= SERVICE(u
);
4546 return s
->status_text
;
4549 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4550 _cleanup_strv_free_
char **l
= NULL
;
4551 Service
*s
= SERVICE(u
);
4557 if (s
->state
!= SERVICE_DEAD
)
4560 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4564 if (strv_isempty(l
))
4567 service_unwatch_control_pid(s
);
4568 s
->clean_result
= SERVICE_SUCCESS
;
4569 s
->control_command
= NULL
;
4570 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4572 r
= service_arm_timer(s
, usec_add(now(CLOCK_MONOTONIC
), s
->exec_context
.timeout_clean_usec
));
4576 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4580 service_set_state(s
, SERVICE_CLEANING
);
4585 log_unit_warning_errno(u
, r
, "Failed to initiate cleaning: %m");
4586 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4587 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
4591 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4592 Service
*s
= SERVICE(u
);
4596 return exec_context_get_clean_mask(&s
->exec_context
, ret
);
4599 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4600 if (t
== JOB_START
&&
4601 result
== JOB_DONE
&&
4602 SERVICE(u
)->type
== SERVICE_ONESHOT
)
4603 return "Finished %s.";
4605 /* Fall back to generic */
4609 static int service_can_start(Unit
*u
) {
4610 Service
*s
= SERVICE(u
);
4615 /* Make sure we don't enter a busy loop of some kind. */
4616 r
= unit_test_start_limit(u
);
4618 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
4625 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
4626 [SERVICE_RESTART_NO
] = "no",
4627 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
4628 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
4629 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
4630 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
4631 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
4632 [SERVICE_RESTART_ALWAYS
] = "always",
4635 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
4637 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
4638 [SERVICE_SIMPLE
] = "simple",
4639 [SERVICE_FORKING
] = "forking",
4640 [SERVICE_ONESHOT
] = "oneshot",
4641 [SERVICE_DBUS
] = "dbus",
4642 [SERVICE_NOTIFY
] = "notify",
4643 [SERVICE_IDLE
] = "idle",
4644 [SERVICE_EXEC
] = "exec",
4647 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
4649 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
4650 [SERVICE_EXIT_MAIN
] = "main",
4651 [SERVICE_EXIT_CGROUP
] = "cgroup",
4654 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
4656 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4657 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
4658 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
4659 [SERVICE_EXEC_START
] = "ExecStart",
4660 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
4661 [SERVICE_EXEC_RELOAD
] = "ExecReload",
4662 [SERVICE_EXEC_STOP
] = "ExecStop",
4663 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
4666 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
4668 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
4669 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
4670 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
4671 [SERVICE_EXEC_START
] = "ExecStartEx",
4672 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
4673 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
4674 [SERVICE_EXEC_STOP
] = "ExecStopEx",
4675 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
4678 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
4680 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
4681 [NOTIFY_UNKNOWN
] = "unknown",
4682 [NOTIFY_READY
] = "ready",
4683 [NOTIFY_RELOADING
] = "reloading",
4684 [NOTIFY_STOPPING
] = "stopping",
4687 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
4689 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
4690 [SERVICE_SUCCESS
] = "success",
4691 [SERVICE_FAILURE_RESOURCES
] = "resources",
4692 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
4693 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
4694 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
4695 [SERVICE_FAILURE_SIGNAL
] = "signal",
4696 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
4697 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
4698 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
4699 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
4700 [SERVICE_SKIP_CONDITION
] = "exec-condition",
4703 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
4705 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
4706 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
4707 [SERVICE_TIMEOUT_ABORT
] = "abort",
4708 [SERVICE_TIMEOUT_KILL
] = "kill",
4711 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
4713 const UnitVTable service_vtable
= {
4714 .object_size
= sizeof(Service
),
4715 .exec_context_offset
= offsetof(Service
, exec_context
),
4716 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
4717 .kill_context_offset
= offsetof(Service
, kill_context
),
4718 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
4719 .dynamic_creds_offset
= offsetof(Service
, dynamic_creds
),
4725 .private_section
= "Service",
4727 .can_transient
= true,
4728 .can_delegate
= true,
4730 .can_set_managed_oom
= true,
4732 .init
= service_init
,
4733 .done
= service_done
,
4734 .load
= service_load
,
4735 .release_resources
= service_release_resources
,
4737 .coldplug
= service_coldplug
,
4739 .dump
= service_dump
,
4741 .start
= service_start
,
4742 .stop
= service_stop
,
4743 .reload
= service_reload
,
4745 .can_reload
= service_can_reload
,
4747 .kill
= service_kill
,
4748 .clean
= service_clean
,
4749 .can_clean
= service_can_clean
,
4751 .freeze
= unit_freeze_vtable_common
,
4752 .thaw
= unit_thaw_vtable_common
,
4754 .serialize
= service_serialize
,
4755 .deserialize_item
= service_deserialize_item
,
4757 .active_state
= service_active_state
,
4758 .sub_state_to_string
= service_sub_state_to_string
,
4760 .will_restart
= service_will_restart
,
4762 .may_gc
= service_may_gc
,
4764 .sigchld_event
= service_sigchld_event
,
4766 .reset_failed
= service_reset_failed
,
4768 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
4769 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
4770 .notify_message
= service_notify_message
,
4772 .main_pid
= service_main_pid
,
4773 .control_pid
= service_control_pid
,
4775 .bus_name_owner_change
= service_bus_name_owner_change
,
4777 .bus_set_property
= bus_service_set_property
,
4778 .bus_commit_properties
= bus_service_commit_properties
,
4780 .get_timeout
= service_get_timeout
,
4781 .needs_console
= service_needs_console
,
4782 .exit_status
= service_exit_status
,
4783 .status_text
= service_status_text
,
4785 .status_message_formats
= {
4786 .finished_start_job
= {
4787 [JOB_FAILED
] = "Failed to start %s.",
4789 .finished_stop_job
= {
4790 [JOB_DONE
] = "Stopped %s.",
4791 [JOB_FAILED
] = "Stopped (with error) %s.",
4793 .finished_job
= service_finished_job
,
4796 .can_start
= service_can_start
,