1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
9 #include "sd-messages.h"
11 #include "alloc-util.h"
13 #include "bus-error.h"
14 #include "bus-kernel.h"
17 #include "constants.h"
18 #include "dbus-service.h"
19 #include "dbus-unit.h"
20 #include "devnum-util.h"
23 #include "exit-status.h"
26 #include "format-util.h"
27 #include "load-dropin.h"
28 #include "load-fragment.h"
31 #include "missing_audit.h"
32 #include "open-file.h"
33 #include "parse-util.h"
34 #include "path-util.h"
35 #include "process-util.h"
36 #include "random-util.h"
37 #include "serialize.h"
39 #include "signal-util.h"
41 #include "stdio-util.h"
42 #include "string-table.h"
43 #include "string-util.h"
45 #include "unit-name.h"
49 #define service_spawn(...) service_spawn_internal(__func__, __VA_ARGS__)
51 static const UnitActiveState state_translation_table
[_SERVICE_STATE_MAX
] = {
52 [SERVICE_DEAD
] = UNIT_INACTIVE
,
53 [SERVICE_CONDITION
] = UNIT_ACTIVATING
,
54 [SERVICE_START_PRE
] = UNIT_ACTIVATING
,
55 [SERVICE_START
] = UNIT_ACTIVATING
,
56 [SERVICE_START_POST
] = UNIT_ACTIVATING
,
57 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
58 [SERVICE_EXITED
] = UNIT_ACTIVE
,
59 [SERVICE_RELOAD
] = UNIT_RELOADING
,
60 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
61 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
62 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
63 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
64 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
65 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
66 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
67 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
68 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
69 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
70 [SERVICE_FAILED
] = UNIT_FAILED
,
71 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
72 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
73 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
74 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
75 [SERVICE_AUTO_RESTART_QUEUED
] = UNIT_ACTIVATING
,
76 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
79 /* For Type=idle we never want to delay any other jobs, hence we
80 * consider idle jobs active as soon as we start working on them */
81 static const UnitActiveState state_translation_table_idle
[_SERVICE_STATE_MAX
] = {
82 [SERVICE_DEAD
] = UNIT_INACTIVE
,
83 [SERVICE_CONDITION
] = UNIT_ACTIVE
,
84 [SERVICE_START_PRE
] = UNIT_ACTIVE
,
85 [SERVICE_START
] = UNIT_ACTIVE
,
86 [SERVICE_START_POST
] = UNIT_ACTIVE
,
87 [SERVICE_RUNNING
] = UNIT_ACTIVE
,
88 [SERVICE_EXITED
] = UNIT_ACTIVE
,
89 [SERVICE_RELOAD
] = UNIT_RELOADING
,
90 [SERVICE_RELOAD_SIGNAL
] = UNIT_RELOADING
,
91 [SERVICE_RELOAD_NOTIFY
] = UNIT_RELOADING
,
92 [SERVICE_STOP
] = UNIT_DEACTIVATING
,
93 [SERVICE_STOP_WATCHDOG
] = UNIT_DEACTIVATING
,
94 [SERVICE_STOP_SIGTERM
] = UNIT_DEACTIVATING
,
95 [SERVICE_STOP_SIGKILL
] = UNIT_DEACTIVATING
,
96 [SERVICE_STOP_POST
] = UNIT_DEACTIVATING
,
97 [SERVICE_FINAL_WATCHDOG
] = UNIT_DEACTIVATING
,
98 [SERVICE_FINAL_SIGTERM
] = UNIT_DEACTIVATING
,
99 [SERVICE_FINAL_SIGKILL
] = UNIT_DEACTIVATING
,
100 [SERVICE_FAILED
] = UNIT_FAILED
,
101 [SERVICE_DEAD_BEFORE_AUTO_RESTART
] = UNIT_INACTIVE
,
102 [SERVICE_FAILED_BEFORE_AUTO_RESTART
] = UNIT_FAILED
,
103 [SERVICE_DEAD_RESOURCES_PINNED
] = UNIT_INACTIVE
,
104 [SERVICE_AUTO_RESTART
] = UNIT_ACTIVATING
,
105 [SERVICE_AUTO_RESTART_QUEUED
] = UNIT_ACTIVATING
,
106 [SERVICE_CLEANING
] = UNIT_MAINTENANCE
,
109 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
110 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
);
111 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
);
112 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
);
114 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
);
115 static void service_enter_reload_by_notify(Service
*s
);
117 static void service_init(Unit
*u
) {
118 Service
*s
= SERVICE(u
);
121 assert(u
->load_state
== UNIT_STUB
);
123 s
->timeout_start_usec
= u
->manager
->defaults
.timeout_start_usec
;
124 s
->timeout_stop_usec
= u
->manager
->defaults
.timeout_stop_usec
;
125 s
->timeout_abort_usec
= u
->manager
->defaults
.timeout_abort_usec
;
126 s
->timeout_abort_set
= u
->manager
->defaults
.timeout_abort_set
;
127 s
->restart_usec
= u
->manager
->defaults
.restart_usec
;
128 s
->restart_max_delay_usec
= USEC_INFINITY
;
129 s
->runtime_max_usec
= USEC_INFINITY
;
130 s
->type
= _SERVICE_TYPE_INVALID
;
131 s
->socket_fd
= -EBADF
;
132 s
->stdin_fd
= s
->stdout_fd
= s
->stderr_fd
= -EBADF
;
133 s
->guess_main_pid
= true;
134 s
->main_pid
= PIDREF_NULL
;
135 s
->control_pid
= PIDREF_NULL
;
136 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
138 s
->exec_context
.keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
139 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
141 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
143 s
->watchdog_original_usec
= USEC_INFINITY
;
145 s
->oom_policy
= _OOM_POLICY_INVALID
;
146 s
->reload_begin_usec
= USEC_INFINITY
;
147 s
->reload_signal
= SIGHUP
;
149 s
->fd_store_preserve_mode
= EXEC_PRESERVE_RESTART
;
152 static void service_unwatch_control_pid(Service
*s
) {
155 if (!pidref_is_set(&s
->control_pid
))
158 unit_unwatch_pid(UNIT(s
), s
->control_pid
.pid
);
159 pidref_done(&s
->control_pid
);
162 static void service_unwatch_main_pid(Service
*s
) {
165 if (!pidref_is_set(&s
->main_pid
))
168 unit_unwatch_pid(UNIT(s
), s
->main_pid
.pid
);
169 pidref_done(&s
->main_pid
);
172 static void service_unwatch_pid_file(Service
*s
) {
173 if (!s
->pid_file_pathspec
)
176 log_unit_debug(UNIT(s
), "Stopping watch for PID file %s", s
->pid_file_pathspec
->path
);
177 path_spec_unwatch(s
->pid_file_pathspec
);
178 path_spec_done(s
->pid_file_pathspec
);
179 s
->pid_file_pathspec
= mfree(s
->pid_file_pathspec
);
182 static int service_set_main_pidref(Service
*s
, PidRef
*pidref
) {
185 /* Takes ownership of the specified pidref on success, but not on failure. */
187 if (!pidref_is_set(pidref
))
190 if (pidref
->pid
<= 1)
193 if (pidref
->pid
== getpid_cached())
196 if (pidref_equal(&s
->main_pid
, pidref
) && s
->main_pid_known
) {
201 if (!pidref_equal(&s
->main_pid
, pidref
)) {
202 service_unwatch_main_pid(s
);
203 exec_status_start(&s
->main_exec_status
, pidref
->pid
);
206 s
->main_pid
= TAKE_PIDREF(*pidref
);
207 s
->main_pid_known
= true;
208 s
->main_pid_alien
= pid_is_my_child(s
->main_pid
.pid
) == 0;
210 if (s
->main_pid_alien
)
211 log_unit_warning(UNIT(s
), "Supervising process "PID_FMT
" which is not our child. We'll most likely not notice when it exits.", s
->main_pid
.pid
);
216 static int service_set_main_pid(Service
*s
, pid_t pid
) {
217 _cleanup_(pidref_done
) PidRef pidref
= PIDREF_NULL
;
222 r
= pidref_set_pid(&pidref
, pid
);
226 return service_set_main_pidref(s
, &pidref
);
229 void service_release_socket_fd(Service
*s
) {
232 if (s
->socket_fd
< 0 && !UNIT_ISSET(s
->accept_socket
) && !s
->socket_peer
)
235 log_unit_debug(UNIT(s
), "Closing connection socket.");
237 /* Undo the effect of service_set_socket_fd(). */
239 s
->socket_fd
= asynchronous_close(s
->socket_fd
);
241 if (UNIT_ISSET(s
->accept_socket
)) {
242 socket_connection_unref(SOCKET(UNIT_DEREF(s
->accept_socket
)));
243 unit_ref_unset(&s
->accept_socket
);
246 s
->socket_peer
= socket_peer_unref(s
->socket_peer
);
249 static void service_override_notify_access(Service
*s
, NotifyAccess notify_access_override
) {
252 s
->notify_access_override
= notify_access_override
;
254 log_unit_debug(UNIT(s
), "notify_access=%s", notify_access_to_string(s
->notify_access
));
255 log_unit_debug(UNIT(s
), "notify_access_override=%s", notify_access_to_string(s
->notify_access_override
));
258 static void service_stop_watchdog(Service
*s
) {
261 s
->watchdog_event_source
= sd_event_source_disable_unref(s
->watchdog_event_source
);
262 s
->watchdog_timestamp
= DUAL_TIMESTAMP_NULL
;
265 static void service_start_watchdog(Service
*s
) {
266 usec_t watchdog_usec
;
271 watchdog_usec
= service_get_watchdog_usec(s
);
272 if (!timestamp_is_set(watchdog_usec
)) {
273 service_stop_watchdog(s
);
277 if (s
->watchdog_event_source
) {
278 r
= sd_event_source_set_time(s
->watchdog_event_source
, usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
));
280 log_unit_warning_errno(UNIT(s
), r
, "Failed to reset watchdog timer: %m");
284 r
= sd_event_source_set_enabled(s
->watchdog_event_source
, SD_EVENT_ONESHOT
);
286 r
= sd_event_add_time(
287 UNIT(s
)->manager
->event
,
288 &s
->watchdog_event_source
,
290 usec_add(s
->watchdog_timestamp
.monotonic
, watchdog_usec
), 0,
291 service_dispatch_watchdog
, s
);
293 log_unit_warning_errno(UNIT(s
), r
, "Failed to add watchdog timer: %m");
297 (void) sd_event_source_set_description(s
->watchdog_event_source
, "service-watchdog");
299 /* Let's process everything else which might be a sign
300 * of living before we consider a service died. */
301 r
= sd_event_source_set_priority(s
->watchdog_event_source
, SD_EVENT_PRIORITY_IDLE
);
304 log_unit_warning_errno(UNIT(s
), r
, "Failed to install watchdog timer: %m");
307 usec_t
service_restart_usec_next(Service
*s
) {
308 unsigned n_restarts_next
;
312 /* When the service state is in SERVICE_*_BEFORE_AUTO_RESTART or SERVICE_AUTO_RESTART, we still need
313 * to add 1 to s->n_restarts manually, because s->n_restarts is not updated until a restart job is
314 * enqueued, i.e. state has transitioned to SERVICE_AUTO_RESTART_QUEUED. */
315 n_restarts_next
= s
->n_restarts
+ (s
->state
== SERVICE_AUTO_RESTART_QUEUED
? 0 : 1);
317 if (n_restarts_next
<= 1 ||
318 s
->restart_steps
== 0 ||
319 s
->restart_usec
== 0 ||
320 s
->restart_max_delay_usec
== USEC_INFINITY
||
321 s
->restart_usec
>= s
->restart_max_delay_usec
)
322 return s
->restart_usec
;
324 if (n_restarts_next
> s
->restart_steps
)
325 return s
->restart_max_delay_usec
;
327 /* Enforced in service_verify() and above */
328 assert(s
->restart_max_delay_usec
> s
->restart_usec
);
330 /* r_i / r_0 = (r_n / r_0) ^ (i / n)
332 * r_0 : initial restart usec (s->restart_usec),
333 * r_i : i-th restart usec (value),
334 * r_n : maximum restart usec (s->restart_max_delay_usec),
335 * i : index of the next step (n_restarts_next - 1)
336 * n : num maximum steps (s->restart_steps) */
337 return (usec_t
) (s
->restart_usec
* powl((long double) s
->restart_max_delay_usec
/ s
->restart_usec
,
338 (long double) (n_restarts_next
- 1) / s
->restart_steps
));
341 static void service_extend_event_source_timeout(Service
*s
, sd_event_source
*source
, usec_t extended
) {
347 /* Extends the specified event source timer to at least the specified time, unless it is already later
353 r
= sd_event_source_get_time(source
, ¤t
);
356 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
357 log_unit_warning_errno(UNIT(s
), r
, "Failed to retrieve timeout time for event source '%s', ignoring: %m", strna(desc
));
361 if (current
>= extended
) /* Current timeout is already longer, ignore this. */
364 r
= sd_event_source_set_time(source
, extended
);
367 (void) sd_event_source_get_description(s
->timer_event_source
, &desc
);
368 log_unit_warning_errno(UNIT(s
), r
, "Failed to set timeout time for event source '%s', ignoring %m", strna(desc
));
372 static void service_extend_timeout(Service
*s
, usec_t extend_timeout_usec
) {
377 if (!timestamp_is_set(extend_timeout_usec
))
380 extended
= usec_add(now(CLOCK_MONOTONIC
), extend_timeout_usec
);
382 service_extend_event_source_timeout(s
, s
->timer_event_source
, extended
);
383 service_extend_event_source_timeout(s
, s
->watchdog_event_source
, extended
);
386 static void service_reset_watchdog(Service
*s
) {
389 dual_timestamp_get(&s
->watchdog_timestamp
);
390 service_start_watchdog(s
);
393 static void service_override_watchdog_timeout(Service
*s
, usec_t watchdog_override_usec
) {
396 s
->watchdog_override_enable
= true;
397 s
->watchdog_override_usec
= watchdog_override_usec
;
398 service_reset_watchdog(s
);
400 log_unit_debug(UNIT(s
), "watchdog_usec="USEC_FMT
, s
->watchdog_usec
);
401 log_unit_debug(UNIT(s
), "watchdog_override_usec="USEC_FMT
, s
->watchdog_override_usec
);
404 static ServiceFDStore
* service_fd_store_unlink(ServiceFDStore
*fs
) {
409 assert(fs
->service
->n_fd_store
> 0);
410 LIST_REMOVE(fd_store
, fs
->service
->fd_store
, fs
);
411 fs
->service
->n_fd_store
--;
414 sd_event_source_disable_unref(fs
->event_source
);
417 asynchronous_close(fs
->fd
);
421 DEFINE_TRIVIAL_CLEANUP_FUNC(ServiceFDStore
*, service_fd_store_unlink
);
423 static void service_release_fd_store(Service
*s
) {
429 log_unit_debug(UNIT(s
), "Releasing all stored fds");
432 service_fd_store_unlink(s
->fd_store
);
434 assert(s
->n_fd_store
== 0);
437 static void service_release_stdio_fd(Service
*s
) {
440 if (s
->stdin_fd
< 0 && s
->stdout_fd
< 0 && s
->stdout_fd
< 0)
443 log_unit_debug(UNIT(s
), "Releasing stdin/stdout/stderr file descriptors.");
445 s
->stdin_fd
= asynchronous_close(s
->stdin_fd
);
446 s
->stdout_fd
= asynchronous_close(s
->stdout_fd
);
447 s
->stderr_fd
= asynchronous_close(s
->stderr_fd
);
449 static void service_done(Unit
*u
) {
450 Service
*s
= SERVICE(u
);
454 open_file_free_many(&s
->open_files
);
456 s
->pid_file
= mfree(s
->pid_file
);
457 s
->status_text
= mfree(s
->status_text
);
459 s
->exec_runtime
= exec_runtime_free(s
->exec_runtime
);
460 exec_command_free_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
461 s
->control_command
= NULL
;
462 s
->main_command
= NULL
;
464 exit_status_set_free(&s
->restart_prevent_status
);
465 exit_status_set_free(&s
->restart_force_status
);
466 exit_status_set_free(&s
->success_status
);
468 /* This will leak a process, but at least no memory or any of our resources */
469 service_unwatch_main_pid(s
);
470 service_unwatch_control_pid(s
);
471 service_unwatch_pid_file(s
);
474 unit_unwatch_bus_name(u
, s
->bus_name
);
475 s
->bus_name
= mfree(s
->bus_name
);
478 s
->bus_name_owner
= mfree(s
->bus_name_owner
);
480 s
->usb_function_descriptors
= mfree(s
->usb_function_descriptors
);
481 s
->usb_function_strings
= mfree(s
->usb_function_strings
);
483 service_stop_watchdog(s
);
485 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
486 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
488 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
490 service_release_socket_fd(s
);
491 service_release_stdio_fd(s
);
492 service_release_fd_store(s
);
495 static int on_fd_store_io(sd_event_source
*e
, int fd
, uint32_t revents
, void *userdata
) {
496 ServiceFDStore
*fs
= ASSERT_PTR(userdata
);
500 /* If we get either EPOLLHUP or EPOLLERR, it's time to remove this entry from the fd store */
501 log_unit_debug(UNIT(fs
->service
),
502 "Received %s on stored fd %d (%s), closing.",
503 revents
& EPOLLERR
? "EPOLLERR" : "EPOLLHUP",
504 fs
->fd
, strna(fs
->fdname
));
505 service_fd_store_unlink(fs
);
509 static int service_add_fd_store(Service
*s
, int fd_in
, const char *name
, bool do_poll
) {
510 _cleanup_(service_fd_store_unlinkp
) ServiceFDStore
*fs
= NULL
;
511 _cleanup_(asynchronous_closep
) int fd
= ASSERT_FD(fd_in
);
515 /* fd is always consumed even if the function fails. */
519 if (fstat(fd
, &st
) < 0)
522 log_unit_debug(UNIT(s
), "Trying to stash fd for dev=" DEVNUM_FORMAT_STR
"/inode=%" PRIu64
, DEVNUM_FORMAT_VAL(st
.st_dev
), (uint64_t) st
.st_ino
);
524 if (s
->n_fd_store
>= s
->n_fd_store_max
)
525 /* Our store is full. Use this errno rather than E[NM]FILE to distinguish from the case
526 * where systemd itself hits the file limit. */
527 return log_unit_debug_errno(UNIT(s
), SYNTHETIC_ERRNO(EXFULL
), "Hit fd store limit.");
529 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
530 r
= same_fd(i
->fd
, fd
);
534 log_unit_debug(UNIT(s
), "Suppressing duplicate fd %i in fd store.", fd
);
535 return 0; /* fd already included */
539 fs
= new(ServiceFDStore
, 1);
543 *fs
= (ServiceFDStore
) {
546 .fdname
= strdup(name
?: "stored"),
553 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &fs
->event_source
, fs
->fd
, 0, on_fd_store_io
, fs
);
554 if (r
< 0 && r
!= -EPERM
) /* EPERM indicates fds that aren't pollable, which is OK */
557 (void) sd_event_source_set_description(fs
->event_source
, "service-fd-store");
561 LIST_PREPEND(fd_store
, s
->fd_store
, fs
);
564 log_unit_debug(UNIT(s
), "Added fd %i (%s) to fd store.", fs
->fd
, fs
->fdname
);
567 return 1; /* fd newly stored */
570 static int service_add_fd_store_set(Service
*s
, FDSet
*fds
, const char *name
, bool do_poll
) {
578 fd
= fdset_steal_first(fds
);
582 r
= service_add_fd_store(s
, fd
, name
, do_poll
);
584 return log_unit_warning_errno(UNIT(s
), r
,
585 "Cannot store more fds than FileDescriptorStoreMax=%u, closing remaining.",
588 return log_unit_error_errno(UNIT(s
), r
, "Failed to add fd to store: %m");
594 static void service_remove_fd_store(Service
*s
, const char *name
) {
598 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
599 if (!streq(fs
->fdname
, name
))
602 log_unit_debug(UNIT(s
), "Got explicit request to remove fd %i (%s), closing.", fs
->fd
, name
);
603 service_fd_store_unlink(fs
);
607 static usec_t
service_running_timeout(Service
*s
) {
612 if (s
->runtime_rand_extra_usec
!= 0) {
613 delta
= random_u64_range(s
->runtime_rand_extra_usec
);
614 log_unit_debug(UNIT(s
), "Adding delta of %s sec to timeout", FORMAT_TIMESPAN(delta
, USEC_PER_SEC
));
617 return usec_add(usec_add(UNIT(s
)->active_enter_timestamp
.monotonic
,
618 s
->runtime_max_usec
),
622 static int service_arm_timer(Service
*s
, bool relative
, usec_t usec
) {
627 if (s
->timer_event_source
) {
628 r
= (relative
? sd_event_source_set_time_relative
: sd_event_source_set_time
)(s
->timer_event_source
, usec
);
632 return sd_event_source_set_enabled(s
->timer_event_source
, SD_EVENT_ONESHOT
);
635 if (usec
== USEC_INFINITY
)
638 r
= (relative
? sd_event_add_time_relative
: sd_event_add_time
)(
639 UNIT(s
)->manager
->event
,
640 &s
->timer_event_source
,
643 service_dispatch_timer
, s
);
647 (void) sd_event_source_set_description(s
->timer_event_source
, "service-timer");
652 static int service_verify(Service
*s
) {
654 assert(UNIT(s
)->load_state
== UNIT_LOADED
);
656 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++)
657 LIST_FOREACH(command
, command
, s
->exec_command
[c
]) {
658 if (!path_is_absolute(command
->path
) && !filename_is_valid(command
->path
))
659 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
660 "Service %s= binary path \"%s\" is neither a valid executable name nor an absolute path. Refusing.",
662 service_exec_command_to_string(c
));
663 if (strv_isempty(command
->argv
))
664 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
),
665 "Service has an empty argv in %s=. Refusing.",
666 service_exec_command_to_string(c
));
669 if (!s
->exec_command
[SERVICE_EXEC_START
] && !s
->exec_command
[SERVICE_EXEC_STOP
] &&
670 UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
671 /* FailureAction= only makes sense if one of the start or stop commands is specified.
672 * SuccessAction= will be executed unconditionally if no commands are specified. Hence,
673 * either a command or SuccessAction= are required. */
675 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart=, ExecStop=, or SuccessAction=. Refusing.");
677 if (s
->type
!= SERVICE_ONESHOT
&& !s
->exec_command
[SERVICE_EXEC_START
])
678 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has no ExecStart= setting, which is only allowed for Type=oneshot services. Refusing.");
680 if (!s
->remain_after_exit
&& !s
->exec_command
[SERVICE_EXEC_START
] && UNIT(s
)->success_action
== EMERGENCY_ACTION_NONE
)
681 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.");
683 if (s
->type
!= SERVICE_ONESHOT
&& s
->exec_command
[SERVICE_EXEC_START
]->command_next
)
684 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.");
686 if (s
->type
== SERVICE_ONESHOT
&&
687 !IN_SET(s
->restart
, SERVICE_RESTART_NO
, SERVICE_RESTART_ON_FAILURE
, SERVICE_RESTART_ON_ABNORMAL
, SERVICE_RESTART_ON_WATCHDOG
, SERVICE_RESTART_ON_ABORT
))
688 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.");
690 if (s
->type
== SERVICE_ONESHOT
&& !exit_status_set_is_empty(&s
->restart_force_status
))
691 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has RestartForceExitStatus= set, which isn't allowed for Type=oneshot services. Refusing.");
693 if (s
->type
== SERVICE_ONESHOT
&& s
->exit_type
== SERVICE_EXIT_CGROUP
)
694 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENOEXEC
), "Service has ExitType=cgroup set, which isn't allowed for Type=oneshot services. Refusing.");
696 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name
)
697 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.");
699 if (s
->exec_context
.pam_name
&& !IN_SET(s
->kill_context
.kill_mode
, KILL_CONTROL_GROUP
, KILL_MIXED
))
700 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.");
702 if (s
->usb_function_descriptors
&& !s
->usb_function_strings
)
703 log_unit_warning(UNIT(s
), "Service has USBFunctionDescriptors= setting, but no USBFunctionStrings=. Ignoring.");
705 if (!s
->usb_function_descriptors
&& s
->usb_function_strings
)
706 log_unit_warning(UNIT(s
), "Service has USBFunctionStrings= setting, but no USBFunctionDescriptors=. Ignoring.");
708 if (s
->runtime_max_usec
!= USEC_INFINITY
&& s
->type
== SERVICE_ONESHOT
)
709 log_unit_warning(UNIT(s
), "RuntimeMaxSec= has no effect in combination with Type=oneshot. Ignoring.");
711 if (s
->runtime_max_usec
== USEC_INFINITY
&& s
->runtime_rand_extra_usec
!= 0)
712 log_unit_warning(UNIT(s
), "Service has RuntimeRandomizedExtraSec= setting, but no RuntimeMaxSec=. Ignoring.");
714 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& cg_unified() < CGROUP_UNIFIED_SYSTEMD
)
715 log_unit_warning(UNIT(s
), "Service has ExitType=cgroup set, but we are running with legacy cgroups v1, which might not work correctly. Continuing.");
717 if (s
->restart_max_delay_usec
== USEC_INFINITY
&& s
->restart_steps
> 0)
718 log_unit_warning(UNIT(s
), "Service has RestartSteps= but no RestartMaxDelaySec= setting. Ignoring.");
720 if (s
->restart_max_delay_usec
!= USEC_INFINITY
&& s
->restart_steps
== 0)
721 log_unit_warning(UNIT(s
), "Service has RestartMaxDelaySec= but no RestartSteps= setting. Ignoring.");
723 if (s
->restart_max_delay_usec
< s
->restart_usec
) {
724 log_unit_warning(UNIT(s
), "RestartMaxDelaySec= has a value smaller than RestartSec=, resetting RestartSec= to RestartMaxDelaySec=.");
725 s
->restart_usec
= s
->restart_max_delay_usec
;
731 static int service_add_default_dependencies(Service
*s
) {
736 if (!UNIT(s
)->default_dependencies
)
739 /* Add a number of automatic dependencies useful for the
740 * majority of services. */
742 if (MANAGER_IS_SYSTEM(UNIT(s
)->manager
)) {
743 /* First, pull in the really early boot stuff, and
744 * require it, so that we fail if we can't acquire
747 r
= unit_add_two_dependencies_by_name(UNIT(s
), UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_SYSINIT_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
752 /* In the --user instance there's no sysinit.target,
753 * in that case require basic.target instead. */
755 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
760 /* Second, if the rest of the base system is in the same
761 * transaction, order us after it, but do not pull it in or
762 * even require it. */
763 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_BASIC_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
767 /* Third, add us in for normal shutdown. */
768 return unit_add_two_dependencies_by_name(UNIT(s
), UNIT_BEFORE
, UNIT_CONFLICTS
, SPECIAL_SHUTDOWN_TARGET
, true, UNIT_DEPENDENCY_DEFAULT
);
771 static void service_fix_stdio(Service
*s
) {
774 /* Note that EXEC_INPUT_NULL and EXEC_OUTPUT_INHERIT play a special role here: they are both the
775 * default value that is subject to automatic overriding triggered by other settings and an explicit
776 * choice the user can make. We don't distinguish between these cases currently. */
778 if (s
->exec_context
.std_input
== EXEC_INPUT_NULL
&&
779 s
->exec_context
.stdin_data_size
> 0)
780 s
->exec_context
.std_input
= EXEC_INPUT_DATA
;
782 if (IN_SET(s
->exec_context
.std_input
,
784 EXEC_INPUT_TTY_FORCE
,
787 EXEC_INPUT_NAMED_FD
))
790 /* We assume these listed inputs refer to bidirectional streams, and hence duplicating them from
791 * stdin to stdout/stderr makes sense and hence leaving EXEC_OUTPUT_INHERIT in place makes sense,
792 * too. Outputs such as regular files or sealed data memfds otoh don't really make sense to be
793 * duplicated for both input and output at the same time (since they then would cause a feedback
794 * loop), hence override EXEC_OUTPUT_INHERIT with the default stderr/stdout setting. */
796 if (s
->exec_context
.std_error
== EXEC_OUTPUT_INHERIT
&&
797 s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
798 s
->exec_context
.std_error
= UNIT(s
)->manager
->defaults
.std_error
;
800 if (s
->exec_context
.std_output
== EXEC_OUTPUT_INHERIT
)
801 s
->exec_context
.std_output
= UNIT(s
)->manager
->defaults
.std_output
;
804 static int service_setup_bus_name(Service
*s
) {
809 /* If s->bus_name is not set, then the unit will be refused by service_verify() later. */
813 if (s
->type
== SERVICE_DBUS
) {
814 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_REQUIRES
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
816 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
818 /* We always want to be ordered against dbus.socket if both are in the transaction. */
819 r
= unit_add_dependency_by_name(UNIT(s
), UNIT_AFTER
, SPECIAL_DBUS_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
821 return log_unit_error_errno(UNIT(s
), r
, "Failed to add dependency on " SPECIAL_DBUS_SOCKET
": %m");
824 r
= unit_watch_bus_name(UNIT(s
), s
->bus_name
);
826 return log_unit_error_errno(UNIT(s
), r
, "Two services allocated for the same bus name %s, refusing operation.", s
->bus_name
);
828 return log_unit_error_errno(UNIT(s
), r
, "Cannot watch bus name %s: %m", s
->bus_name
);
833 static int service_add_extras(Service
*s
) {
838 if (s
->type
== _SERVICE_TYPE_INVALID
) {
839 /* Figure out a type automatically */
841 s
->type
= SERVICE_DBUS
;
842 else if (s
->exec_command
[SERVICE_EXEC_START
])
843 s
->type
= SERVICE_SIMPLE
;
845 s
->type
= SERVICE_ONESHOT
;
848 /* Oneshot services have disabled start timeout by default */
849 if (s
->type
== SERVICE_ONESHOT
&& !s
->start_timeout_defined
)
850 s
->timeout_start_usec
= USEC_INFINITY
;
852 service_fix_stdio(s
);
854 r
= unit_patch_contexts(UNIT(s
));
858 r
= unit_add_exec_dependencies(UNIT(s
), &s
->exec_context
);
862 r
= unit_set_default_slice(UNIT(s
));
866 /* If the service needs the notify socket, let's enable it automatically. */
867 if (s
->notify_access
== NOTIFY_NONE
&&
868 (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) || s
->watchdog_usec
> 0 || s
->n_fd_store_max
> 0))
869 s
->notify_access
= NOTIFY_MAIN
;
871 /* If no OOM policy was explicitly set, then default to the configure default OOM policy. Except when
872 * delegation is on, in that case it we assume the payload knows better what to do and can process
873 * things in a more focused way. */
874 if (s
->oom_policy
< 0)
875 s
->oom_policy
= s
->cgroup_context
.delegate
? OOM_CONTINUE
: UNIT(s
)->manager
->defaults
.oom_policy
;
877 /* Let the kernel do the killing if that's requested. */
878 s
->cgroup_context
.memory_oom_group
= s
->oom_policy
== OOM_KILL
;
880 r
= service_add_default_dependencies(s
);
884 r
= service_setup_bus_name(s
);
891 static int service_load(Unit
*u
) {
892 Service
*s
= SERVICE(u
);
895 r
= unit_load_fragment_and_dropin(u
, true);
899 if (u
->load_state
!= UNIT_LOADED
)
902 /* This is a new unit? Then let's add in some extras */
903 r
= service_add_extras(s
);
907 return service_verify(s
);
910 static void service_dump_fdstore(Service
*s
, FILE *f
, const char *prefix
) {
915 LIST_FOREACH(fd_store
, i
, s
->fd_store
) {
916 _cleanup_free_
char *path
= NULL
;
920 if (fstat(i
->fd
, &st
) < 0) {
921 log_debug_errno(errno
, "Failed to stat fdstore entry: %m");
925 flags
= fcntl(i
->fd
, F_GETFL
);
927 log_debug_errno(errno
, "Failed to get fdstore entry flags: %m");
931 (void) fd_get_path(i
->fd
, &path
);
934 "%s%s '%s' (type=%s; dev=" DEVNUM_FORMAT_STR
"; inode=%" PRIu64
"; rdev=" DEVNUM_FORMAT_STR
"; path=%s; access=%s)\n",
935 prefix
, i
== s
->fd_store
? "File Descriptor Store Entry:" : " ",
937 inode_type_to_string(st
.st_mode
),
938 DEVNUM_FORMAT_VAL(st
.st_dev
),
939 (uint64_t) st
.st_ino
,
940 DEVNUM_FORMAT_VAL(st
.st_rdev
),
942 accmode_to_string(flags
));
946 static void service_dump(Unit
*u
, FILE *f
, const char *prefix
) {
947 Service
*s
= SERVICE(u
);
952 prefix
= strempty(prefix
);
953 prefix2
= strjoina(prefix
, "\t");
956 "%sService State: %s\n"
958 "%sReload Result: %s\n"
959 "%sClean Result: %s\n"
960 "%sPermissionsStartOnly: %s\n"
961 "%sRootDirectoryStartOnly: %s\n"
962 "%sRemainAfterExit: %s\n"
963 "%sGuessMainPID: %s\n"
966 "%sNotifyAccess: %s\n"
967 "%sNotifyState: %s\n"
969 "%sReloadSignal: %s\n",
970 prefix
, service_state_to_string(s
->state
),
971 prefix
, service_result_to_string(s
->result
),
972 prefix
, service_result_to_string(s
->reload_result
),
973 prefix
, service_result_to_string(s
->clean_result
),
974 prefix
, yes_no(s
->permissions_start_only
),
975 prefix
, yes_no(s
->root_directory_start_only
),
976 prefix
, yes_no(s
->remain_after_exit
),
977 prefix
, yes_no(s
->guess_main_pid
),
978 prefix
, service_type_to_string(s
->type
),
979 prefix
, service_restart_to_string(s
->restart
),
980 prefix
, notify_access_to_string(service_get_notify_access(s
)),
981 prefix
, notify_state_to_string(s
->notify_state
),
982 prefix
, oom_policy_to_string(s
->oom_policy
),
983 prefix
, signal_to_string(s
->reload_signal
));
985 if (pidref_is_set(&s
->control_pid
))
987 "%sControl PID: "PID_FMT
"\n",
988 prefix
, s
->control_pid
.pid
);
990 if (pidref_is_set(&s
->main_pid
))
992 "%sMain PID: "PID_FMT
"\n"
993 "%sMain PID Known: %s\n"
994 "%sMain PID Alien: %s\n",
995 prefix
, s
->main_pid
.pid
,
996 prefix
, yes_no(s
->main_pid_known
),
997 prefix
, yes_no(s
->main_pid_alien
));
1002 prefix
, s
->pid_file
);
1007 "%sBus Name Good: %s\n",
1008 prefix
, s
->bus_name
,
1009 prefix
, yes_no(s
->bus_name_good
));
1011 if (UNIT_ISSET(s
->accept_socket
))
1013 "%sAccept Socket: %s\n",
1014 prefix
, UNIT_DEREF(s
->accept_socket
)->id
);
1017 "%sRestartSec: %s\n"
1018 "%sRestartSteps: %u\n"
1019 "%sRestartMaxDelaySec: %s\n"
1020 "%sTimeoutStartSec: %s\n"
1021 "%sTimeoutStopSec: %s\n"
1022 "%sTimeoutStartFailureMode: %s\n"
1023 "%sTimeoutStopFailureMode: %s\n",
1024 prefix
, FORMAT_TIMESPAN(s
->restart_usec
, USEC_PER_SEC
),
1025 prefix
, s
->restart_steps
,
1026 prefix
, FORMAT_TIMESPAN(s
->restart_max_delay_usec
, USEC_PER_SEC
),
1027 prefix
, FORMAT_TIMESPAN(s
->timeout_start_usec
, USEC_PER_SEC
),
1028 prefix
, FORMAT_TIMESPAN(s
->timeout_stop_usec
, USEC_PER_SEC
),
1029 prefix
, service_timeout_failure_mode_to_string(s
->timeout_start_failure_mode
),
1030 prefix
, service_timeout_failure_mode_to_string(s
->timeout_stop_failure_mode
));
1032 if (s
->timeout_abort_set
)
1034 "%sTimeoutAbortSec: %s\n",
1035 prefix
, FORMAT_TIMESPAN(s
->timeout_abort_usec
, USEC_PER_SEC
));
1038 "%sRuntimeMaxSec: %s\n"
1039 "%sRuntimeRandomizedExtraSec: %s\n"
1040 "%sWatchdogSec: %s\n",
1041 prefix
, FORMAT_TIMESPAN(s
->runtime_max_usec
, USEC_PER_SEC
),
1042 prefix
, FORMAT_TIMESPAN(s
->runtime_rand_extra_usec
, USEC_PER_SEC
),
1043 prefix
, FORMAT_TIMESPAN(s
->watchdog_usec
, USEC_PER_SEC
));
1045 kill_context_dump(&s
->kill_context
, f
, prefix
);
1046 exec_context_dump(&s
->exec_context
, f
, prefix
);
1048 for (ServiceExecCommand c
= 0; c
< _SERVICE_EXEC_COMMAND_MAX
; c
++) {
1049 if (!s
->exec_command
[c
])
1052 fprintf(f
, "%s-> %s:\n",
1053 prefix
, service_exec_command_to_string(c
));
1055 exec_command_dump_list(s
->exec_command
[c
], f
, prefix2
);
1059 fprintf(f
, "%sStatus Text: %s\n",
1060 prefix
, s
->status_text
);
1062 if (s
->n_fd_store_max
> 0)
1064 "%sFile Descriptor Store Max: %u\n"
1065 "%sFile Descriptor Store Pin: %s\n"
1066 "%sFile Descriptor Store Current: %zu\n",
1067 prefix
, s
->n_fd_store_max
,
1068 prefix
, exec_preserve_mode_to_string(s
->fd_store_preserve_mode
),
1069 prefix
, s
->n_fd_store
);
1071 service_dump_fdstore(s
, f
, prefix
);
1074 LIST_FOREACH(open_files
, of
, s
->open_files
) {
1075 _cleanup_free_
char *ofs
= NULL
;
1078 r
= open_file_to_string(of
, &ofs
);
1081 "Failed to convert OpenFile= setting to string, ignoring: %m");
1085 fprintf(f
, "%sOpen File: %s\n", prefix
, ofs
);
1088 cgroup_context_dump(UNIT(s
), f
, prefix
);
1091 static int service_is_suitable_main_pid(Service
*s
, pid_t pid
, int prio
) {
1095 assert(pid_is_valid(pid
));
1097 /* Checks whether the specified PID is suitable as main PID for this service. returns negative if not, 0 if the
1098 * PID is questionnable but should be accepted if the source of configuration is trusted. > 0 if the PID is
1101 if (pid
== getpid_cached() || pid
== 1)
1102 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the manager, refusing.", pid
);
1104 if (pid
== s
->control_pid
.pid
)
1105 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(EPERM
), "New main PID "PID_FMT
" is the control process, refusing.", pid
);
1107 if (!pid_is_alive(pid
))
1108 return log_unit_full_errno(UNIT(s
), prio
, SYNTHETIC_ERRNO(ESRCH
), "New main PID "PID_FMT
" does not exist or is a zombie.", pid
);
1110 owner
= manager_get_unit_by_pid(UNIT(s
)->manager
, pid
);
1111 if (owner
== UNIT(s
)) {
1112 log_unit_debug(UNIT(s
), "New main PID "PID_FMT
" belongs to service, we are happy.", pid
);
1113 return 1; /* Yay, it's definitely a good PID */
1116 return 0; /* Hmm it's a suspicious PID, let's accept it if configuration source is trusted */
1119 static int service_load_pid_file(Service
*s
, bool may_warn
) {
1120 _cleanup_(pidref_done
) PidRef pidref
= PIDREF_NULL
;
1121 bool questionable_pid_file
= false;
1122 _cleanup_free_
char *k
= NULL
;
1123 _cleanup_close_
int fd
= -EBADF
;
1132 prio
= may_warn
? LOG_INFO
: LOG_DEBUG
;
1134 r
= chase(s
->pid_file
, NULL
, CHASE_SAFE
, NULL
, &fd
);
1135 if (r
== -ENOLINK
) {
1136 log_unit_debug_errno(UNIT(s
), r
,
1137 "Potentially unsafe symlink chain, will now retry with relaxed checks: %s", s
->pid_file
);
1139 questionable_pid_file
= true;
1141 r
= chase(s
->pid_file
, NULL
, 0, NULL
, &fd
);
1144 return log_unit_full_errno(UNIT(s
), prio
, r
,
1145 "Can't open PID file %s (yet?) after %s: %m", s
->pid_file
, service_state_to_string(s
->state
));
1147 /* Let's read the PID file now that we chased it down. But we need to convert the O_PATH fd
1148 * chase() returned us into a proper fd first. */
1149 r
= read_one_line_file(FORMAT_PROC_FD_PATH(fd
), &k
);
1151 return log_unit_error_errno(UNIT(s
), r
,
1152 "Can't convert PID files %s O_PATH file descriptor to proper file descriptor: %m",
1155 r
= parse_pid(k
, &pid
);
1157 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to parse PID from file %s: %m", s
->pid_file
);
1159 if (s
->main_pid_known
&& pid
== s
->main_pid
.pid
)
1162 r
= pidref_set_pid(&pidref
, pid
);
1164 return log_unit_full_errno(UNIT(s
), prio
, r
, "Failed to pin PID " PID_FMT
": %m", pid
);
1166 r
= service_is_suitable_main_pid(s
, pidref
.pid
, prio
);
1172 if (questionable_pid_file
)
1173 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1174 "Refusing to accept PID outside of service control group, acquired through unsafe symlink chain: %s", s
->pid_file
);
1176 /* Hmm, it's not clear if the new main PID is safe. Let's allow this if the PID file is owned by root */
1178 if (fstat(fd
, &st
) < 0)
1179 return log_unit_error_errno(UNIT(s
), errno
, "Failed to fstat() PID file O_PATH fd: %m");
1182 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EPERM
),
1183 "New main PID "PID_FMT
" does not belong to service, and PID file is not owned by root. Refusing.", pidref
.pid
);
1185 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.", pidref
.pid
);
1188 if (s
->main_pid_known
) {
1189 log_unit_debug(UNIT(s
), "Main PID changing: "PID_FMT
" -> "PID_FMT
, s
->main_pid
.pid
, pidref
.pid
);
1191 service_unwatch_main_pid(s
);
1192 s
->main_pid_known
= false;
1194 log_unit_debug(UNIT(s
), "Main PID loaded: "PID_FMT
, pidref
.pid
);
1196 r
= service_set_main_pidref(s
, &pidref
);
1200 r
= unit_watch_pid(UNIT(s
), s
->main_pid
.pid
, /* exclusive= */ false);
1201 if (r
< 0) /* FIXME: we need to do something here */
1202 return log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" for service: %m", s
->main_pid
.pid
);
1207 static void service_search_main_pid(Service
*s
) {
1213 /* If we know it anyway, don't ever fall back to unreliable heuristics */
1214 if (s
->main_pid_known
)
1217 if (!s
->guess_main_pid
)
1220 assert(!pidref_is_set(&s
->main_pid
));
1222 if (unit_search_main_pid(UNIT(s
), &pid
) < 0)
1225 log_unit_debug(UNIT(s
), "Main PID guessed: "PID_FMT
, pid
);
1226 if (service_set_main_pid(s
, pid
) < 0)
1229 r
= unit_watch_pid(UNIT(s
), s
->main_pid
.pid
, /* exclusive= */ false);
1231 /* FIXME: we need to do something here */
1232 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch PID "PID_FMT
" from: %m", s
->main_pid
.pid
);
1235 static void service_set_state(Service
*s
, ServiceState state
) {
1236 ServiceState old_state
;
1237 const UnitActiveState
*table
;
1241 if (s
->state
!= state
)
1242 bus_unit_send_pending_change_signal(UNIT(s
), false);
1244 table
= s
->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
1246 old_state
= s
->state
;
1249 service_unwatch_pid_file(s
);
1252 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1254 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1255 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1256 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1257 SERVICE_AUTO_RESTART
,
1259 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
1262 SERVICE_START
, SERVICE_START_POST
,
1264 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1265 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1266 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
)) {
1267 service_unwatch_main_pid(s
);
1268 s
->main_command
= NULL
;
1272 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1273 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1274 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1275 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1276 SERVICE_CLEANING
)) {
1277 service_unwatch_control_pid(s
);
1278 s
->control_command
= NULL
;
1279 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
1283 SERVICE_DEAD
, SERVICE_FAILED
,
1284 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
,
1285 SERVICE_DEAD_RESOURCES_PINNED
)) {
1286 unit_unwatch_all_pids(UNIT(s
));
1287 unit_dequeue_rewatch_pids(UNIT(s
));
1290 if (state
!= SERVICE_START
)
1291 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
1293 if (!IN_SET(state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1294 service_stop_watchdog(s
);
1296 /* For the inactive states unit_notify() will trim the cgroup,
1297 * but for exit we have to do that ourselves... */
1298 if (state
== SERVICE_EXITED
&& !MANAGER_IS_RELOADING(UNIT(s
)->manager
))
1299 unit_prune_cgroup(UNIT(s
));
1301 if (old_state
!= state
)
1302 log_unit_debug(UNIT(s
), "Changed %s -> %s", service_state_to_string(old_state
), service_state_to_string(state
));
1304 unit_notify(UNIT(s
), table
[old_state
], table
[state
], s
->reload_result
== SERVICE_SUCCESS
);
1307 static usec_t
service_coldplug_timeout(Service
*s
) {
1310 switch (s
->deserialized_state
) {
1312 case SERVICE_CONDITION
:
1313 case SERVICE_START_PRE
:
1315 case SERVICE_START_POST
:
1316 case SERVICE_RELOAD
:
1317 case SERVICE_RELOAD_SIGNAL
:
1318 case SERVICE_RELOAD_NOTIFY
:
1319 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_start_usec
);
1321 case SERVICE_RUNNING
:
1322 return service_running_timeout(s
);
1325 case SERVICE_STOP_SIGTERM
:
1326 case SERVICE_STOP_SIGKILL
:
1327 case SERVICE_STOP_POST
:
1328 case SERVICE_FINAL_SIGTERM
:
1329 case SERVICE_FINAL_SIGKILL
:
1330 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->timeout_stop_usec
);
1332 case SERVICE_STOP_WATCHDOG
:
1333 case SERVICE_FINAL_WATCHDOG
:
1334 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, service_timeout_abort_usec(s
));
1336 case SERVICE_AUTO_RESTART
:
1337 return usec_add(UNIT(s
)->inactive_enter_timestamp
.monotonic
, service_restart_usec_next(s
));
1339 case SERVICE_CLEANING
:
1340 return usec_add(UNIT(s
)->state_change_timestamp
.monotonic
, s
->exec_context
.timeout_clean_usec
);
1343 return USEC_INFINITY
;
1347 static int service_coldplug(Unit
*u
) {
1348 Service
*s
= SERVICE(u
);
1352 assert(s
->state
== SERVICE_DEAD
);
1354 if (s
->deserialized_state
== s
->state
)
1357 r
= service_arm_timer(s
, /* relative= */ false, service_coldplug_timeout(s
));
1361 if (pidref_is_set(&s
->main_pid
) &&
1362 pid_is_unwaited(s
->main_pid
.pid
) &&
1363 (IN_SET(s
->deserialized_state
,
1364 SERVICE_START
, SERVICE_START_POST
,
1366 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1367 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1368 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
))) {
1369 r
= unit_watch_pid(UNIT(s
), s
->main_pid
.pid
, /* exclusive= */ false);
1374 if (pidref_is_set(&s
->control_pid
) &&
1375 pid_is_unwaited(s
->control_pid
.pid
) &&
1376 IN_SET(s
->deserialized_state
,
1377 SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
,
1378 SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
,
1379 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
1380 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
,
1381 SERVICE_CLEANING
)) {
1382 r
= unit_watch_pid(UNIT(s
), s
->control_pid
.pid
, /* exclusive= */ false);
1387 if (!IN_SET(s
->deserialized_state
,
1388 SERVICE_DEAD
, SERVICE_FAILED
,
1389 SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
,
1391 SERVICE_DEAD_RESOURCES_PINNED
)) {
1392 (void) unit_enqueue_rewatch_pids(u
);
1393 (void) unit_setup_exec_runtime(u
);
1396 if (IN_SET(s
->deserialized_state
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
1397 service_start_watchdog(s
);
1399 if (UNIT_ISSET(s
->accept_socket
)) {
1400 Socket
* socket
= SOCKET(UNIT_DEREF(s
->accept_socket
));
1402 if (socket
->max_connections_per_source
> 0) {
1405 /* Make a best-effort attempt at bumping the connection count */
1406 if (socket_acquire_peer(socket
, s
->socket_fd
, &peer
) > 0) {
1407 socket_peer_unref(s
->socket_peer
);
1408 s
->socket_peer
= peer
;
1413 service_set_state(s
, s
->deserialized_state
);
1417 static int service_collect_fds(
1421 size_t *n_socket_fds
,
1422 size_t *n_storage_fds
) {
1424 _cleanup_strv_free_
char **rfd_names
= NULL
;
1425 _cleanup_free_
int *rfds
= NULL
;
1426 size_t rn_socket_fds
= 0, rn_storage_fds
= 0;
1432 assert(n_socket_fds
);
1433 assert(n_storage_fds
);
1435 if (s
->socket_fd
>= 0) {
1437 /* Pass the per-connection socket */
1439 rfds
= newdup(int, &s
->socket_fd
, 1);
1443 rfd_names
= strv_new("connection");
1451 /* Pass all our configured sockets for singleton services */
1453 UNIT_FOREACH_DEPENDENCY(u
, UNIT(s
), UNIT_ATOM_TRIGGERED_BY
) {
1454 _cleanup_free_
int *cfds
= NULL
;
1458 if (u
->type
!= UNIT_SOCKET
)
1463 cn_fds
= socket_collect_fds(sock
, &cfds
);
1471 rfds
= TAKE_PTR(cfds
);
1472 rn_socket_fds
= cn_fds
;
1476 t
= reallocarray(rfds
, rn_socket_fds
+ cn_fds
, sizeof(int));
1480 memcpy(t
+ rn_socket_fds
, cfds
, cn_fds
* sizeof(int));
1483 rn_socket_fds
+= cn_fds
;
1486 r
= strv_extend_n(&rfd_names
, socket_fdname(sock
), cn_fds
);
1492 if (s
->n_fd_store
> 0) {
1497 t
= reallocarray(rfds
, rn_socket_fds
+ s
->n_fd_store
, sizeof(int));
1503 nl
= reallocarray(rfd_names
, rn_socket_fds
+ s
->n_fd_store
+ 1, sizeof(char *));
1508 n_fds
= rn_socket_fds
;
1510 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
1511 rfds
[n_fds
] = fs
->fd
;
1512 rfd_names
[n_fds
] = strdup(strempty(fs
->fdname
));
1513 if (!rfd_names
[n_fds
])
1520 rfd_names
[n_fds
] = NULL
;
1523 *fds
= TAKE_PTR(rfds
);
1524 *fd_names
= TAKE_PTR(rfd_names
);
1525 *n_socket_fds
= rn_socket_fds
;
1526 *n_storage_fds
= rn_storage_fds
;
1531 static int service_allocate_exec_fd_event_source(
1534 sd_event_source
**ret_event_source
) {
1536 _cleanup_(sd_event_source_unrefp
) sd_event_source
*source
= NULL
;
1541 assert(ret_event_source
);
1543 r
= sd_event_add_io(UNIT(s
)->manager
->event
, &source
, fd
, 0, service_dispatch_exec_io
, s
);
1545 return log_unit_error_errno(UNIT(s
), r
, "Failed to allocate exec_fd event source: %m");
1547 /* This is a bit lower priority than SIGCHLD, as that carries a lot more interesting failure information */
1549 r
= sd_event_source_set_priority(source
, SD_EVENT_PRIORITY_NORMAL
-3);
1551 return log_unit_error_errno(UNIT(s
), r
, "Failed to adjust priority of exec_fd event source: %m");
1553 (void) sd_event_source_set_description(source
, "service exec_fd");
1555 r
= sd_event_source_set_io_fd_own(source
, true);
1557 return log_unit_error_errno(UNIT(s
), r
, "Failed to pass ownership of fd to event source: %m");
1559 *ret_event_source
= TAKE_PTR(source
);
1563 static int service_allocate_exec_fd(
1565 sd_event_source
**ret_event_source
,
1568 _cleanup_close_pair_
int p
[] = PIPE_EBADF
;
1572 assert(ret_event_source
);
1573 assert(ret_exec_fd
);
1575 if (pipe2(p
, O_CLOEXEC
|O_NONBLOCK
) < 0)
1576 return log_unit_error_errno(UNIT(s
), errno
, "Failed to allocate exec_fd pipe: %m");
1578 r
= service_allocate_exec_fd_event_source(s
, p
[0], ret_event_source
);
1583 *ret_exec_fd
= TAKE_FD(p
[1]);
1588 static bool service_exec_needs_notify_socket(Service
*s
, ExecFlags flags
) {
1591 /* Notifications are accepted depending on the process and
1592 * the access setting of the service:
1593 * process: \ access: NONE MAIN EXEC ALL
1594 * main no yes yes yes
1595 * control no no yes yes
1596 * other (forked) no no no yes */
1598 if (flags
& EXEC_IS_CONTROL
)
1599 /* A control process */
1600 return IN_SET(service_get_notify_access(s
), NOTIFY_EXEC
, NOTIFY_ALL
);
1602 /* We only spawn main processes and control processes, so any
1603 * process that is not a control process is a main process */
1604 return service_get_notify_access(s
) != NOTIFY_NONE
;
1607 static Service
*service_get_triggering_service(Service
*s
) {
1608 Unit
*candidate
= NULL
, *other
;
1612 /* Return the service which triggered service 's', this means dependency
1613 * types which include the UNIT_ATOM_ON_{FAILURE,SUCCESS}_OF atoms.
1615 * N.B. if there are multiple services which could trigger 's' via OnFailure=
1616 * or OnSuccess= then we return NULL. This is since we don't know from which
1617 * one to propagate the exit status. */
1619 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_FAILURE_OF
) {
1625 UNIT_FOREACH_DEPENDENCY(other
, UNIT(s
), UNIT_ATOM_ON_SUCCESS_OF
) {
1631 return SERVICE(candidate
);
1634 log_unit_warning(UNIT(s
), "multiple trigger source candidates for exit status propagation (%s, %s), skipping.",
1635 candidate
->id
, other
->id
);
1639 static int service_spawn_internal(
1647 _cleanup_(exec_params_clear
) ExecParameters exec_params
= {
1650 .stdout_fd
= -EBADF
,
1651 .stderr_fd
= -EBADF
,
1654 _cleanup_(sd_event_source_unrefp
) sd_event_source
*exec_fd_source
= NULL
;
1655 _cleanup_strv_free_
char **final_env
= NULL
, **our_env
= NULL
;
1656 _cleanup_(pidref_done
) PidRef pidref
= PIDREF_NULL
;
1666 log_unit_debug(UNIT(s
), "Will spawn child (%s): %s", caller
, c
->path
);
1668 r
= unit_prepare_exec(UNIT(s
)); /* This realizes the cgroup, among other things */
1672 assert(!s
->exec_fd_event_source
);
1674 if (flags
& EXEC_IS_CONTROL
) {
1675 /* If this is a control process, mask the permissions/chroot application if this is requested. */
1676 if (s
->permissions_start_only
)
1677 exec_params
.flags
&= ~EXEC_APPLY_SANDBOXING
;
1678 if (s
->root_directory_start_only
)
1679 exec_params
.flags
&= ~EXEC_APPLY_CHROOT
;
1682 if ((flags
& EXEC_PASS_FDS
) ||
1683 s
->exec_context
.std_input
== EXEC_INPUT_SOCKET
||
1684 s
->exec_context
.std_output
== EXEC_OUTPUT_SOCKET
||
1685 s
->exec_context
.std_error
== EXEC_OUTPUT_SOCKET
) {
1687 r
= service_collect_fds(s
,
1689 &exec_params
.fd_names
,
1690 &exec_params
.n_socket_fds
,
1691 &exec_params
.n_storage_fds
);
1695 exec_params
.open_files
= s
->open_files
;
1697 log_unit_debug(UNIT(s
), "Passing %zu fds to service", exec_params
.n_socket_fds
+ exec_params
.n_storage_fds
);
1700 if (!FLAGS_SET(flags
, EXEC_IS_CONTROL
) && s
->type
== SERVICE_EXEC
) {
1701 r
= service_allocate_exec_fd(s
, &exec_fd_source
, &exec_params
.exec_fd
);
1706 r
= service_arm_timer(s
, /* relative= */ true, timeout
);
1710 our_env
= new0(char*, 13);
1714 if (service_exec_needs_notify_socket(s
, flags
)) {
1715 if (asprintf(our_env
+ n_env
++, "NOTIFY_SOCKET=%s", UNIT(s
)->manager
->notify_socket
) < 0)
1718 exec_params
.notify_socket
= UNIT(s
)->manager
->notify_socket
;
1720 if (s
->n_fd_store_max
> 0)
1721 if (asprintf(our_env
+ n_env
++, "FDSTORE=%u", s
->n_fd_store_max
) < 0)
1725 if (pidref_is_set(&s
->main_pid
))
1726 if (asprintf(our_env
+ n_env
++, "MAINPID="PID_FMT
, s
->main_pid
.pid
) < 0)
1729 if (MANAGER_IS_USER(UNIT(s
)->manager
))
1730 if (asprintf(our_env
+ n_env
++, "MANAGERPID="PID_FMT
, getpid_cached()) < 0)
1734 if (asprintf(our_env
+ n_env
++, "PIDFILE=%s", s
->pid_file
) < 0)
1737 if (s
->socket_fd
>= 0) {
1738 union sockaddr_union sa
;
1739 socklen_t salen
= sizeof(sa
);
1741 /* If this is a per-connection service instance, let's set $REMOTE_ADDR and $REMOTE_PORT to something
1742 * useful. Note that we do this only when we are still connected at this point in time, which we might
1743 * very well not be. Hence we ignore all errors when retrieving peer information (as that might result
1744 * in ENOTCONN), and just use whate we can use. */
1746 if (getpeername(s
->socket_fd
, &sa
.sa
, &salen
) >= 0 &&
1747 IN_SET(sa
.sa
.sa_family
, AF_INET
, AF_INET6
, AF_VSOCK
)) {
1748 _cleanup_free_
char *addr
= NULL
;
1752 r
= sockaddr_pretty(&sa
.sa
, salen
, true, false, &addr
);
1756 t
= strjoin("REMOTE_ADDR=", addr
);
1759 our_env
[n_env
++] = t
;
1761 r
= sockaddr_port(&sa
.sa
, &port
);
1765 if (asprintf(&t
, "REMOTE_PORT=%u", port
) < 0)
1767 our_env
[n_env
++] = t
;
1771 Service
*env_source
= NULL
;
1772 const char *monitor_prefix
;
1773 if (flags
& EXEC_SETENV_RESULT
) {
1775 monitor_prefix
= "";
1776 } else if (flags
& EXEC_SETENV_MONITOR_RESULT
) {
1777 env_source
= service_get_triggering_service(s
);
1778 monitor_prefix
= "MONITOR_";
1782 if (asprintf(our_env
+ n_env
++, "%sSERVICE_RESULT=%s", monitor_prefix
, service_result_to_string(env_source
->result
)) < 0)
1785 if (env_source
->main_exec_status
.pid
> 0 &&
1786 dual_timestamp_is_set(&env_source
->main_exec_status
.exit_timestamp
)) {
1787 if (asprintf(our_env
+ n_env
++, "%sEXIT_CODE=%s", monitor_prefix
, sigchld_code_to_string(env_source
->main_exec_status
.code
)) < 0)
1790 if (env_source
->main_exec_status
.code
== CLD_EXITED
)
1791 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%i", monitor_prefix
, env_source
->main_exec_status
.status
);
1793 r
= asprintf(our_env
+ n_env
++, "%sEXIT_STATUS=%s", monitor_prefix
, signal_to_string(env_source
->main_exec_status
.status
));
1799 if (env_source
!= s
) {
1800 if (!sd_id128_is_null(UNIT(env_source
)->invocation_id
)) {
1801 r
= asprintf(our_env
+ n_env
++, "%sINVOCATION_ID=" SD_ID128_FORMAT_STR
,
1802 monitor_prefix
, SD_ID128_FORMAT_VAL(UNIT(env_source
)->invocation_id
));
1807 if (asprintf(our_env
+ n_env
++, "%sUNIT=%s", monitor_prefix
, UNIT(env_source
)->id
) < 0)
1812 if (UNIT(s
)->activation_details
) {
1813 r
= activation_details_append_env(UNIT(s
)->activation_details
, &our_env
);
1816 /* The number of env vars added here can vary, rather than keeping the allocation block in
1817 * sync manually, these functions simply use the strv methods to append to it, so we need
1818 * to update n_env when we are done in case of future usage. */
1822 r
= unit_set_exec_params(UNIT(s
), &exec_params
);
1826 final_env
= strv_env_merge(exec_params
.environment
, our_env
);
1830 /* System D-Bus needs nss-systemd disabled, so that we don't deadlock */
1831 SET_FLAG(exec_params
.flags
, EXEC_NSS_DYNAMIC_BYPASS
,
1832 MANAGER_IS_SYSTEM(UNIT(s
)->manager
) && unit_has_name(UNIT(s
), SPECIAL_DBUS_SERVICE
));
1834 strv_free_and_replace(exec_params
.environment
, final_env
);
1835 exec_params
.watchdog_usec
= service_get_watchdog_usec(s
);
1836 exec_params
.selinux_context_net
= s
->socket_fd_selinux_context_net
;
1837 if (s
->type
== SERVICE_IDLE
)
1838 exec_params
.idle_pipe
= UNIT(s
)->manager
->idle_pipe
;
1839 exec_params
.stdin_fd
= s
->stdin_fd
;
1840 exec_params
.stdout_fd
= s
->stdout_fd
;
1841 exec_params
.stderr_fd
= s
->stderr_fd
;
1843 r
= exec_spawn(UNIT(s
),
1853 s
->exec_fd_event_source
= TAKE_PTR(exec_fd_source
);
1854 s
->exec_fd_hot
= false;
1856 r
= pidref_set_pid(&pidref
, pid
);
1860 r
= unit_watch_pid(UNIT(s
), pidref
.pid
, /* exclusive= */ true);
1864 *ret_pid
= TAKE_PIDREF(pidref
);
1868 static int main_pid_good(Service
*s
) {
1871 /* Returns 0 if the pid is dead, > 0 if it is good, < 0 if we don't know */
1873 /* If we know the pid file, then let's just check if it is still valid */
1874 if (s
->main_pid_known
) {
1876 /* If it's an alien child let's check if it is still alive ... */
1877 if (s
->main_pid_alien
&& pidref_is_set(&s
->main_pid
))
1878 return pid_is_alive(s
->main_pid
.pid
);
1880 /* .. otherwise assume we'll get a SIGCHLD for it, which we really should wait for to collect
1881 * exit status and code */
1882 return pidref_is_set(&s
->main_pid
);
1885 /* We don't know the pid */
1889 static int control_pid_good(Service
*s
) {
1892 /* Returns 0 if the control PID is dead, > 0 if it is good. We never actually return < 0 here, but in order to
1893 * make this function as similar as possible to main_pid_good() and cgroup_good(), we pretend that < 0 also
1894 * means: we can't figure it out. */
1896 return pidref_is_set(&s
->control_pid
);
1899 static int cgroup_good(Service
*s
) {
1904 /* Returns 0 if the cgroup is empty or doesn't exist, > 0 if it is exists and is populated, < 0 if we can't
1907 if (!UNIT(s
)->cgroup_path
)
1910 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, UNIT(s
)->cgroup_path
);
1917 static bool service_shall_restart(Service
*s
, const char **reason
) {
1920 /* Don't restart after manual stops */
1921 if (s
->forbid_restart
) {
1922 *reason
= "manual stop";
1926 /* Never restart if this is configured as special exception */
1927 if (exit_status_set_test(&s
->restart_prevent_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1928 *reason
= "prevented by exit status";
1932 /* Restart if the exit code/status are configured as restart triggers */
1933 if (exit_status_set_test(&s
->restart_force_status
, s
->main_exec_status
.code
, s
->main_exec_status
.status
)) {
1934 *reason
= "forced by exit status";
1938 *reason
= "restart setting";
1939 switch (s
->restart
) {
1941 case SERVICE_RESTART_NO
:
1944 case SERVICE_RESTART_ALWAYS
:
1945 return s
->result
!= SERVICE_SKIP_CONDITION
;
1947 case SERVICE_RESTART_ON_SUCCESS
:
1948 return s
->result
== SERVICE_SUCCESS
;
1950 case SERVICE_RESTART_ON_FAILURE
:
1951 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_SKIP_CONDITION
);
1953 case SERVICE_RESTART_ON_ABNORMAL
:
1954 return !IN_SET(s
->result
, SERVICE_SUCCESS
, SERVICE_FAILURE_EXIT_CODE
, SERVICE_SKIP_CONDITION
);
1956 case SERVICE_RESTART_ON_WATCHDOG
:
1957 return s
->result
== SERVICE_FAILURE_WATCHDOG
;
1959 case SERVICE_RESTART_ON_ABORT
:
1960 return IN_SET(s
->result
, SERVICE_FAILURE_SIGNAL
, SERVICE_FAILURE_CORE_DUMP
);
1963 assert_not_reached();
1967 static bool service_will_restart(Unit
*u
) {
1968 Service
*s
= SERVICE(u
);
1972 if (IN_SET(s
->state
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
, SERVICE_AUTO_RESTART
, SERVICE_AUTO_RESTART_QUEUED
))
1975 return unit_will_restart_default(u
);
1978 static ServiceState
service_determine_dead_state(Service
*s
) {
1981 return s
->fd_store
&& s
->fd_store_preserve_mode
== EXEC_PRESERVE_YES
? SERVICE_DEAD_RESOURCES_PINNED
: SERVICE_DEAD
;
1984 static void service_enter_dead(Service
*s
, ServiceResult f
, bool allow_restart
) {
1985 ServiceState end_state
, restart_state
;
1990 /* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
1991 * undo what has already been enqueued. */
1992 if (unit_stop_pending(UNIT(s
)))
1993 allow_restart
= false;
1995 if (s
->result
== SERVICE_SUCCESS
)
1998 if (s
->result
== SERVICE_SUCCESS
) {
1999 unit_log_success(UNIT(s
));
2000 end_state
= service_determine_dead_state(s
);
2001 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
2002 } else if (s
->result
== SERVICE_SKIP_CONDITION
) {
2003 unit_log_skip(UNIT(s
), service_result_to_string(s
->result
));
2004 end_state
= service_determine_dead_state(s
);
2005 restart_state
= SERVICE_DEAD_BEFORE_AUTO_RESTART
;
2007 unit_log_failure(UNIT(s
), service_result_to_string(s
->result
));
2008 end_state
= SERVICE_FAILED
;
2009 restart_state
= SERVICE_FAILED_BEFORE_AUTO_RESTART
;
2011 unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_stop
);
2014 log_unit_debug(UNIT(s
), "Service restart not allowed.");
2018 allow_restart
= service_shall_restart(s
, &reason
);
2019 log_unit_debug(UNIT(s
), "Service will %srestart (%s)",
2020 allow_restart
? "" : "not ",
2024 if (allow_restart
) {
2025 usec_t restart_usec_next
;
2027 /* We make two state changes here: one that maps to the high-level UNIT_INACTIVE/UNIT_FAILED
2028 * state (i.e. a state indicating deactivation), and then one that that maps to the
2029 * high-level UNIT_STARTING state (i.e. a state indicating activation). We do this so that
2030 * external software can watch the state changes and see all service failures, even if they
2031 * are only transitionary and followed by an automatic restart. We have fine-grained
2032 * low-level states for this though so that software can distinguish the permanent UNIT_INACTIVE
2033 * state from this transitionary UNIT_INACTIVE state by looking at the low-level states. */
2034 if (s
->restart_mode
!= SERVICE_RESTART_MODE_DIRECT
)
2035 service_set_state(s
, restart_state
);
2037 restart_usec_next
= service_restart_usec_next(s
);
2039 r
= service_arm_timer(s
, /* relative= */ true, restart_usec_next
);
2041 log_unit_warning_errno(UNIT(s
), r
, "Failed to install restart timer: %m");
2042 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, /* allow_restart= */ false);
2046 log_unit_debug(UNIT(s
), "Next restart interval calculated as: %s", FORMAT_TIMESPAN(restart_usec_next
, 0));
2048 service_set_state(s
, SERVICE_AUTO_RESTART
);
2050 service_set_state(s
, end_state
);
2052 /* If we shan't restart, then flush out the restart counter. But don't do that immediately, so that the
2053 * user can still introspect the counter. Do so on the next start. */
2054 s
->flush_n_restarts
= true;
2057 /* The new state is in effect, let's decrease the fd store ref counter again. Let's also re-add us to the GC
2058 * queue, so that the fd store is possibly gc'ed again */
2059 unit_add_to_gc_queue(UNIT(s
));
2061 /* The next restart might not be a manual stop, hence reset the flag indicating manual stops */
2062 s
->forbid_restart
= false;
2064 /* Reset NotifyAccess override */
2065 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2067 /* We want fresh tmpdirs and ephemeral snapshots in case the service is started again immediately. */
2068 s
->exec_runtime
= exec_runtime_destroy(s
->exec_runtime
);
2070 /* Also, remove the runtime directory */
2071 unit_destroy_runtime_data(UNIT(s
), &s
->exec_context
);
2073 /* Also get rid of the fd store, if that's configured. */
2074 if (s
->fd_store_preserve_mode
== EXEC_PRESERVE_NO
)
2075 service_release_fd_store(s
);
2077 /* Get rid of the IPC bits of the user */
2078 unit_unref_uid_gid(UNIT(s
), true);
2080 /* Try to delete the pid file. At this point it will be
2081 * out-of-date, and some software might be confused by it, so
2082 * let's remove it. */
2084 (void) unlink(s
->pid_file
);
2086 /* Reset TTY ownership if necessary */
2087 exec_context_revert_tty(&s
->exec_context
);
2090 static void service_enter_stop_post(Service
*s
, ServiceResult f
) {
2094 if (s
->result
== SERVICE_SUCCESS
)
2097 service_unwatch_control_pid(s
);
2098 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2100 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP_POST
];
2101 if (s
->control_command
) {
2102 s
->control_command_id
= SERVICE_EXEC_STOP_POST
;
2103 pidref_done(&s
->control_pid
);
2105 r
= service_spawn(s
,
2107 s
->timeout_stop_usec
,
2108 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2111 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'stop-post' task: %m");
2112 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2116 service_set_state(s
, SERVICE_STOP_POST
);
2118 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_SUCCESS
);
2121 static int state_to_kill_operation(Service
*s
, ServiceState state
) {
2124 case SERVICE_STOP_WATCHDOG
:
2125 case SERVICE_FINAL_WATCHDOG
:
2126 return KILL_WATCHDOG
;
2128 case SERVICE_STOP_SIGTERM
:
2129 if (unit_has_job_type(UNIT(s
), JOB_RESTART
))
2130 return KILL_RESTART
;
2133 case SERVICE_FINAL_SIGTERM
:
2134 return KILL_TERMINATE
;
2136 case SERVICE_STOP_SIGKILL
:
2137 case SERVICE_FINAL_SIGKILL
:
2141 return _KILL_OPERATION_INVALID
;
2145 static void service_enter_signal(Service
*s
, ServiceState state
, ServiceResult f
) {
2146 int kill_operation
, r
;
2150 if (s
->result
== SERVICE_SUCCESS
)
2153 /* Before sending any signal, make sure we track all members of this cgroup */
2154 (void) unit_watch_all_pids(UNIT(s
));
2156 /* Also, enqueue a job that we recheck all our PIDs a bit later, given that it's likely some processes have
2158 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2160 kill_operation
= state_to_kill_operation(s
, state
);
2161 r
= unit_kill_context(
2169 log_unit_warning_errno(UNIT(s
), r
, "Failed to kill processes: %m");
2174 r
= service_arm_timer(s
, /* relative= */ true,
2175 kill_operation
== KILL_WATCHDOG
? service_timeout_abort_usec(s
) : s
->timeout_stop_usec
);
2177 log_unit_warning_errno(UNIT(s
), r
, "Failed to install timer: %m");
2181 service_set_state(s
, state
);
2182 } else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
) && s
->kill_context
.send_sigkill
)
2183 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_SUCCESS
);
2184 else if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2185 service_enter_stop_post(s
, SERVICE_SUCCESS
);
2186 else if (IN_SET(state
, SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
) && s
->kill_context
.send_sigkill
)
2187 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2189 service_enter_dead(s
, SERVICE_SUCCESS
, /* allow_restart= */ true);
2194 if (IN_SET(state
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
))
2195 service_enter_stop_post(s
, SERVICE_FAILURE_RESOURCES
);
2197 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, /* allow_restart= */ true);
2200 static void service_enter_stop_by_notify(Service
*s
) {
2203 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2205 service_arm_timer(s
, /* relative= */ true, s
->timeout_stop_usec
);
2207 /* The service told us it's stopping, so it's as if we SIGTERM'd it. */
2208 service_set_state(s
, SERVICE_STOP_SIGTERM
);
2211 static void service_enter_stop(Service
*s
, ServiceResult f
) {
2216 if (s
->result
== SERVICE_SUCCESS
)
2219 service_unwatch_control_pid(s
);
2220 (void) unit_enqueue_rewatch_pids(UNIT(s
));
2222 s
->control_command
= s
->exec_command
[SERVICE_EXEC_STOP
];
2223 if (s
->control_command
) {
2224 s
->control_command_id
= SERVICE_EXEC_STOP
;
2225 pidref_done(&s
->control_pid
);
2227 r
= service_spawn(s
,
2229 s
->timeout_stop_usec
,
2230 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_SETENV_RESULT
|EXEC_CONTROL_CGROUP
,
2233 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'stop' task: %m");
2234 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2238 service_set_state(s
, SERVICE_STOP
);
2240 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2243 static bool service_good(Service
*s
) {
2247 if (s
->type
== SERVICE_DBUS
&& !s
->bus_name_good
)
2250 main_pid_ok
= main_pid_good(s
);
2251 if (main_pid_ok
> 0) /* It's alive */
2253 if (main_pid_ok
== 0 && s
->exit_type
== SERVICE_EXIT_MAIN
) /* It's dead */
2256 /* OK, we don't know anything about the main PID, maybe
2257 * because there is none. Let's check the control group
2260 return cgroup_good(s
) != 0;
2263 static void service_enter_running(Service
*s
, ServiceResult f
) {
2266 if (s
->result
== SERVICE_SUCCESS
)
2269 service_unwatch_control_pid(s
);
2271 if (s
->result
!= SERVICE_SUCCESS
)
2272 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
2273 else if (service_good(s
)) {
2275 /* If there are any queued up sd_notify() notifications, process them now */
2276 if (s
->notify_state
== NOTIFY_RELOADING
)
2277 service_enter_reload_by_notify(s
);
2278 else if (s
->notify_state
== NOTIFY_STOPPING
)
2279 service_enter_stop_by_notify(s
);
2281 service_set_state(s
, SERVICE_RUNNING
);
2282 service_arm_timer(s
, /* relative= */ false, service_running_timeout(s
));
2285 } else if (s
->remain_after_exit
)
2286 service_set_state(s
, SERVICE_EXITED
);
2288 service_enter_stop(s
, SERVICE_SUCCESS
);
2291 static void service_enter_start_post(Service
*s
) {
2295 service_unwatch_control_pid(s
);
2296 service_reset_watchdog(s
);
2298 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_POST
];
2299 if (s
->control_command
) {
2300 s
->control_command_id
= SERVICE_EXEC_START_POST
;
2301 pidref_done(&s
->control_pid
);
2303 r
= service_spawn(s
,
2305 s
->timeout_start_usec
,
2306 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2309 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'start-post' task: %m");
2310 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2314 service_set_state(s
, SERVICE_START_POST
);
2316 service_enter_running(s
, SERVICE_SUCCESS
);
2319 static void service_kill_control_process(Service
*s
) {
2324 if (!pidref_is_set(&s
->control_pid
))
2327 r
= pidref_kill_and_sigcont(&s
->control_pid
, SIGKILL
);
2329 _cleanup_free_
char *comm
= NULL
;
2331 (void) get_process_comm(s
->control_pid
.pid
, &comm
);
2333 log_unit_debug_errno(UNIT(s
), r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m",
2334 s
->control_pid
.pid
, strna(comm
));
2338 static int service_adverse_to_leftover_processes(Service
*s
) {
2341 /* KillMode=mixed and control group are used to indicate that all process should be killed off.
2342 * SendSIGKILL= is used for services that require a clean shutdown. These are typically database
2343 * service where a SigKilled process would result in a lengthy recovery and who's shutdown or startup
2344 * time is quite variable (so Timeout settings aren't of use).
2346 * Here we take these two factors and refuse to start a service if there are existing processes
2347 * within a control group. Databases, while generally having some protection against multiple
2348 * instances running, lets not stress the rigor of these. Also ExecStartPre= parts of the service
2349 * aren't as rigoriously written to protect aganst against multiple use. */
2351 if (unit_warn_leftover_processes(UNIT(s
), unit_log_leftover_process_start
) > 0 &&
2352 IN_SET(s
->kill_context
.kill_mode
, KILL_MIXED
, KILL_CONTROL_GROUP
) &&
2353 !s
->kill_context
.send_sigkill
)
2354 return log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(EBUSY
),
2355 "Will not start SendSIGKILL=no service of type KillMode=control-group or mixed while processes exist");
2360 static void service_enter_start(Service
*s
) {
2361 _cleanup_(pidref_done
) PidRef pidref
= PIDREF_NULL
;
2368 service_unwatch_control_pid(s
);
2369 service_unwatch_main_pid(s
);
2371 r
= service_adverse_to_leftover_processes(s
);
2375 if (s
->type
== SERVICE_FORKING
) {
2376 s
->control_command_id
= SERVICE_EXEC_START
;
2377 c
= s
->control_command
= s
->exec_command
[SERVICE_EXEC_START
];
2379 s
->main_command
= NULL
;
2381 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
2382 s
->control_command
= NULL
;
2384 c
= s
->main_command
= s
->exec_command
[SERVICE_EXEC_START
];
2388 if (s
->type
!= SERVICE_ONESHOT
) {
2389 /* There's no command line configured for the main command? Hmm, that is strange.
2390 * This can only happen if the configuration changes at runtime. In this case,
2391 * let's enter a failure state. */
2392 r
= log_unit_error_errno(UNIT(s
), SYNTHETIC_ERRNO(ENXIO
), "There's no 'start' task anymore we could start.");
2396 /* We force a fake state transition here. Otherwise, the unit would go directly from
2397 * SERVICE_DEAD to SERVICE_DEAD without SERVICE_ACTIVATING or SERVICE_ACTIVE
2398 * in between. This way we can later trigger actions that depend on the state
2399 * transition, including SuccessAction=. */
2400 service_set_state(s
, SERVICE_START
);
2402 service_enter_start_post(s
);
2406 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
))
2407 /* For simple + idle this is the main process. We don't apply any timeout here, but
2408 * service_enter_running() will later apply the .runtime_max_usec timeout. */
2409 timeout
= USEC_INFINITY
;
2411 timeout
= s
->timeout_start_usec
;
2413 r
= service_spawn(s
,
2416 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_WRITE_CREDENTIALS
|EXEC_SETENV_MONITOR_RESULT
,
2419 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'start' task: %m");
2423 if (IN_SET(s
->type
, SERVICE_SIMPLE
, SERVICE_IDLE
)) {
2424 /* For simple services we immediately start
2425 * the START_POST binaries. */
2427 (void) service_set_main_pidref(s
, &pidref
);
2428 service_enter_start_post(s
);
2430 } else if (s
->type
== SERVICE_FORKING
) {
2432 /* For forking services we wait until the start
2433 * process exited. */
2435 pidref_done(&s
->control_pid
);
2436 s
->control_pid
= TAKE_PIDREF(pidref
);
2437 service_set_state(s
, SERVICE_START
);
2439 } else if (IN_SET(s
->type
, SERVICE_ONESHOT
, SERVICE_DBUS
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
, SERVICE_EXEC
)) {
2441 /* For oneshot services we wait until the start process exited, too, but it is our main process. */
2443 /* For D-Bus services we know the main pid right away, but wait for the bus name to appear on the
2444 * bus. 'notify' and 'exec' services are similar. */
2446 (void) service_set_main_pidref(s
, &pidref
);
2447 service_set_state(s
, SERVICE_START
);
2449 assert_not_reached();
2454 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2457 static void service_enter_start_pre(Service
*s
) {
2462 service_unwatch_control_pid(s
);
2464 s
->control_command
= s
->exec_command
[SERVICE_EXEC_START_PRE
];
2465 if (s
->control_command
) {
2467 r
= service_adverse_to_leftover_processes(s
);
2471 s
->control_command_id
= SERVICE_EXEC_START_PRE
;
2473 r
= service_spawn(s
,
2475 s
->timeout_start_usec
,
2476 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2479 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'start-pre' task: %m");
2483 service_set_state(s
, SERVICE_START_PRE
);
2485 service_enter_start(s
);
2490 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, /* allow_restart= */ true);
2493 static void service_enter_condition(Service
*s
) {
2498 service_unwatch_control_pid(s
);
2500 s
->control_command
= s
->exec_command
[SERVICE_EXEC_CONDITION
];
2501 if (s
->control_command
) {
2503 r
= service_adverse_to_leftover_processes(s
);
2507 s
->control_command_id
= SERVICE_EXEC_CONDITION
;
2508 pidref_done(&s
->control_pid
);
2510 r
= service_spawn(s
,
2512 s
->timeout_start_usec
,
2513 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_APPLY_TTY_STDIN
,
2517 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'exec-condition' task: %m");
2521 service_set_state(s
, SERVICE_CONDITION
);
2523 service_enter_start_pre(s
);
2528 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, /* allow_restart= */ true);
2531 static void service_enter_restart(Service
*s
) {
2532 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2537 if (unit_has_job_type(UNIT(s
), JOB_STOP
)) {
2538 /* Don't restart things if we are going down anyway */
2539 log_unit_info(UNIT(s
), "Stop job pending for unit, skipping automatic restart.");
2543 /* Any units that are bound to this service must also be restarted. We use JOB_START for ourselves
2544 * but then set JOB_RESTART_DEPENDENCIES which will enqueue JOB_RESTART for those dependency jobs. */
2545 r
= manager_add_job(UNIT(s
)->manager
, JOB_START
, UNIT(s
), JOB_RESTART_DEPENDENCIES
, NULL
, &error
, NULL
);
2547 log_unit_warning(UNIT(s
), "Failed to schedule restart job: %s", bus_error_message(&error
, r
));
2548 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, /* allow_restart= */ false);
2552 /* Count the jobs we enqueue for restarting. This counter is maintained as long as the unit isn't
2553 * fully stopped, i.e. as long as it remains up or remains in auto-start states. The user can reset
2554 * the counter explicitly however via the usual "systemctl reset-failure" logic. */
2556 s
->flush_n_restarts
= false;
2558 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2560 log_unit_struct(UNIT(s
), LOG_INFO
,
2561 "MESSAGE_ID=" SD_MESSAGE_UNIT_RESTART_SCHEDULED_STR
,
2562 LOG_UNIT_INVOCATION_ID(UNIT(s
)),
2563 LOG_UNIT_MESSAGE(UNIT(s
),
2564 "Scheduled restart job, restart counter is at %u.", s
->n_restarts
),
2565 "N_RESTARTS=%u", s
->n_restarts
);
2567 service_set_state(s
, SERVICE_AUTO_RESTART_QUEUED
);
2569 /* Notify clients about changed restart counter */
2570 unit_add_to_dbus_queue(UNIT(s
));
2573 static void service_enter_reload_by_notify(Service
*s
) {
2574 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2579 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2580 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
2582 /* service_enter_reload_by_notify is never called during a reload, thus no loops are possible. */
2583 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
2585 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload: %s", bus_error_message(&error
, r
));
2588 static void service_enter_reload(Service
*s
) {
2589 bool killed
= false;
2594 service_unwatch_control_pid(s
);
2595 s
->reload_result
= SERVICE_SUCCESS
;
2597 usec_t ts
= now(CLOCK_MONOTONIC
);
2599 if (s
->type
== SERVICE_NOTIFY_RELOAD
&& pidref_is_set(&s
->main_pid
)) {
2600 r
= pidref_kill_and_sigcont(&s
->main_pid
, s
->reload_signal
);
2602 log_unit_warning_errno(UNIT(s
), r
, "Failed to send reload signal: %m");
2609 s
->control_command
= s
->exec_command
[SERVICE_EXEC_RELOAD
];
2610 if (s
->control_command
) {
2611 s
->control_command_id
= SERVICE_EXEC_RELOAD
;
2612 pidref_done(&s
->control_pid
);
2614 r
= service_spawn(s
,
2616 s
->timeout_start_usec
,
2617 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|EXEC_CONTROL_CGROUP
,
2620 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn 'reload' task: %m");
2624 service_set_state(s
, SERVICE_RELOAD
);
2625 } else if (killed
) {
2626 service_arm_timer(s
, /* relative= */ true, s
->timeout_start_usec
);
2627 service_set_state(s
, SERVICE_RELOAD_SIGNAL
);
2629 service_enter_running(s
, SERVICE_SUCCESS
);
2633 /* Store the timestamp when we started reloading: when reloading via SIGHUP we won't leave the reload
2634 * state until we received both RELOADING=1 and READY=1 with MONOTONIC_USEC= set to a value above
2635 * this. Thus we know for sure the reload cycle was executed *after* we requested it, and is not one
2636 * that was already in progress before. */
2637 s
->reload_begin_usec
= ts
;
2641 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2642 service_enter_running(s
, SERVICE_SUCCESS
);
2645 static void service_run_next_control(Service
*s
) {
2650 assert(s
->control_command
);
2651 assert(s
->control_command
->command_next
);
2653 assert(s
->control_command_id
!= SERVICE_EXEC_START
);
2655 s
->control_command
= s
->control_command
->command_next
;
2656 service_unwatch_control_pid(s
);
2658 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
))
2659 timeout
= s
->timeout_start_usec
;
2661 timeout
= s
->timeout_stop_usec
;
2663 pidref_done(&s
->control_pid
);
2665 r
= service_spawn(s
,
2668 EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_IS_CONTROL
|
2669 (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
) ? EXEC_WRITE_CREDENTIALS
: 0)|
2670 (IN_SET(s
->control_command_id
, SERVICE_EXEC_CONDITION
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_STOP_POST
) ? EXEC_APPLY_TTY_STDIN
: 0)|
2671 (IN_SET(s
->control_command_id
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_SETENV_RESULT
: 0)|
2672 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_PRE
, SERVICE_EXEC_START
) ? EXEC_SETENV_MONITOR_RESULT
: 0)|
2673 (IN_SET(s
->control_command_id
, SERVICE_EXEC_START_POST
, SERVICE_EXEC_RELOAD
, SERVICE_EXEC_STOP
, SERVICE_EXEC_STOP_POST
) ? EXEC_CONTROL_CGROUP
: 0),
2676 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn next control task: %m");
2678 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START_POST
, SERVICE_STOP
))
2679 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
2680 else if (s
->state
== SERVICE_STOP_POST
)
2681 service_enter_dead(s
, SERVICE_FAILURE_RESOURCES
, /* allow_restart= */ true);
2682 else if (s
->state
== SERVICE_RELOAD
) {
2683 s
->reload_result
= SERVICE_FAILURE_RESOURCES
;
2684 service_enter_running(s
, SERVICE_SUCCESS
);
2686 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2690 static void service_run_next_main(Service
*s
) {
2691 _cleanup_(pidref_done
) PidRef pidref
= PIDREF_NULL
;
2695 assert(s
->main_command
);
2696 assert(s
->main_command
->command_next
);
2697 assert(s
->type
== SERVICE_ONESHOT
);
2699 s
->main_command
= s
->main_command
->command_next
;
2700 service_unwatch_main_pid(s
);
2702 r
= service_spawn(s
,
2704 s
->timeout_start_usec
,
2705 EXEC_PASS_FDS
|EXEC_APPLY_SANDBOXING
|EXEC_APPLY_CHROOT
|EXEC_APPLY_TTY_STDIN
|EXEC_SET_WATCHDOG
|EXEC_SETENV_MONITOR_RESULT
|EXEC_WRITE_CREDENTIALS
,
2708 log_unit_warning_errno(UNIT(s
), r
, "Failed to spawn next main task: %m");
2709 service_enter_stop(s
, SERVICE_FAILURE_RESOURCES
);
2713 (void) service_set_main_pidref(s
, &pidref
);
2716 static int service_start(Unit
*u
) {
2717 Service
*s
= SERVICE(u
);
2722 /* We cannot fulfill this request right now, try again later
2724 if (IN_SET(s
->state
,
2725 SERVICE_STOP
, SERVICE_STOP_WATCHDOG
, SERVICE_STOP_SIGTERM
, SERVICE_STOP_SIGKILL
, SERVICE_STOP_POST
,
2726 SERVICE_FINAL_WATCHDOG
, SERVICE_FINAL_SIGTERM
, SERVICE_FINAL_SIGKILL
, SERVICE_CLEANING
))
2729 /* Already on it! */
2730 if (IN_SET(s
->state
, SERVICE_CONDITION
, SERVICE_START_PRE
, SERVICE_START
, SERVICE_START_POST
))
2733 /* A service that will be restarted must be stopped first to trigger BindsTo and/or OnFailure
2734 * dependencies. If a user does not want to wait for the holdoff time to elapse, the service should
2735 * be manually restarted, not started. We simply return EAGAIN here, so that any start jobs stay
2736 * queued, and assume that the auto restart timer will eventually trigger the restart. */
2737 if (IN_SET(s
->state
, SERVICE_AUTO_RESTART
, SERVICE_DEAD_BEFORE_AUTO_RESTART
, SERVICE_FAILED_BEFORE_AUTO_RESTART
))
2740 assert(IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
, SERVICE_AUTO_RESTART_QUEUED
));
2742 r
= unit_acquire_invocation_id(u
);
2746 s
->result
= SERVICE_SUCCESS
;
2747 s
->reload_result
= SERVICE_SUCCESS
;
2748 s
->main_pid_known
= false;
2749 s
->main_pid_alien
= false;
2750 s
->forbid_restart
= false;
2752 s
->status_text
= mfree(s
->status_text
);
2753 s
->status_errno
= 0;
2755 s
->notify_access_override
= _NOTIFY_ACCESS_INVALID
;
2756 s
->notify_state
= NOTIFY_UNKNOWN
;
2758 s
->watchdog_original_usec
= s
->watchdog_usec
;
2759 s
->watchdog_override_enable
= false;
2760 s
->watchdog_override_usec
= USEC_INFINITY
;
2762 exec_command_reset_status_list_array(s
->exec_command
, _SERVICE_EXEC_COMMAND_MAX
);
2763 exec_status_reset(&s
->main_exec_status
);
2765 /* This is not an automatic restart? Flush the restart counter then */
2766 if (s
->flush_n_restarts
) {
2768 s
->flush_n_restarts
= false;
2771 u
->reset_accounting
= true;
2773 service_enter_condition(s
);
2777 static int service_stop(Unit
*u
) {
2778 Service
*s
= SERVICE(u
);
2782 /* Don't create restart jobs from manual stops. */
2783 s
->forbid_restart
= true;
2788 case SERVICE_STOP_SIGTERM
:
2789 case SERVICE_STOP_SIGKILL
:
2790 case SERVICE_STOP_POST
:
2791 case SERVICE_FINAL_WATCHDOG
:
2792 case SERVICE_FINAL_SIGTERM
:
2793 case SERVICE_FINAL_SIGKILL
:
2797 case SERVICE_AUTO_RESTART
:
2798 case SERVICE_AUTO_RESTART_QUEUED
:
2799 /* Give up on the auto restart */
2800 service_set_state(s
, service_determine_dead_state(s
));
2803 case SERVICE_CONDITION
:
2804 case SERVICE_START_PRE
:
2806 case SERVICE_START_POST
:
2807 case SERVICE_RELOAD
:
2808 case SERVICE_RELOAD_SIGNAL
:
2809 case SERVICE_RELOAD_NOTIFY
:
2810 case SERVICE_STOP_WATCHDOG
:
2811 /* If there's already something running we go directly into kill mode. */
2812 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_SUCCESS
);
2815 case SERVICE_CLEANING
:
2816 /* If we are currently cleaning, then abort it, brutally. */
2817 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_SUCCESS
);
2820 case SERVICE_RUNNING
:
2821 case SERVICE_EXITED
:
2822 service_enter_stop(s
, SERVICE_SUCCESS
);
2825 case SERVICE_DEAD_BEFORE_AUTO_RESTART
:
2826 case SERVICE_FAILED_BEFORE_AUTO_RESTART
:
2828 case SERVICE_FAILED
:
2829 case SERVICE_DEAD_RESOURCES_PINNED
:
2831 /* Unknown state, or unit_stop() should already have handled these */
2832 assert_not_reached();
2836 static int service_reload(Unit
*u
) {
2837 Service
*s
= SERVICE(u
);
2841 assert(IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_EXITED
));
2843 service_enter_reload(s
);
2847 static bool service_can_reload(Unit
*u
) {
2848 Service
*s
= SERVICE(u
);
2852 return s
->exec_command
[SERVICE_EXEC_RELOAD
] ||
2853 s
->type
== SERVICE_NOTIFY_RELOAD
;
2856 static unsigned service_exec_command_index(Unit
*u
, ServiceExecCommand id
, const ExecCommand
*current
) {
2857 Service
*s
= SERVICE(u
);
2862 assert(id
< _SERVICE_EXEC_COMMAND_MAX
);
2864 const ExecCommand
*first
= s
->exec_command
[id
];
2866 /* Figure out where we are in the list by walking back to the beginning */
2867 for (const ExecCommand
*c
= current
; c
!= first
; c
= c
->command_prev
)
2873 static int service_serialize_exec_command(Unit
*u
, FILE *f
, const ExecCommand
*command
) {
2874 _cleanup_free_
char *args
= NULL
, *p
= NULL
;
2875 Service
*s
= SERVICE(u
);
2876 const char *type
, *key
;
2877 ServiceExecCommand id
;
2887 if (command
== s
->control_command
) {
2889 id
= s
->control_command_id
;
2892 id
= SERVICE_EXEC_START
;
2895 idx
= service_exec_command_index(u
, id
, command
);
2897 STRV_FOREACH(arg
, command
->argv
) {
2898 _cleanup_free_
char *e
= NULL
;
2906 if (!GREEDY_REALLOC(args
, length
+ 2 + n
+ 2))
2910 args
[length
++] = ' ';
2912 args
[length
++] = '"';
2913 memcpy(args
+ length
, e
, n
);
2915 args
[length
++] = '"';
2918 if (!GREEDY_REALLOC(args
, length
+ 1))
2923 p
= cescape(command
->path
);
2927 key
= strjoina(type
, "-command");
2929 /* We use '+1234' instead of '1234' to mark the last command in a sequence.
2930 * This is used in service_deserialize_exec_command(). */
2931 (void) serialize_item_format(
2934 service_exec_command_to_string(id
),
2935 command
->command_next
? "" : "+",
2942 static int service_serialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
2943 Service
*s
= SERVICE(u
);
2950 (void) serialize_item(f
, "state", service_state_to_string(s
->state
));
2951 (void) serialize_item(f
, "result", service_result_to_string(s
->result
));
2952 (void) serialize_item(f
, "reload-result", service_result_to_string(s
->reload_result
));
2954 if (pidref_is_set(&s
->control_pid
))
2955 (void) serialize_item_format(f
, "control-pid", PID_FMT
, s
->control_pid
.pid
);
2957 if (s
->main_pid_known
&& pidref_is_set(&s
->main_pid
))
2958 (void) serialize_item_format(f
, "main-pid", PID_FMT
, s
->main_pid
.pid
);
2960 (void) serialize_bool(f
, "main-pid-known", s
->main_pid_known
);
2961 (void) serialize_bool(f
, "bus-name-good", s
->bus_name_good
);
2962 (void) serialize_bool(f
, "bus-name-owner", s
->bus_name_owner
);
2964 (void) serialize_item_format(f
, "n-restarts", "%u", s
->n_restarts
);
2965 (void) serialize_bool(f
, "flush-n-restarts", s
->flush_n_restarts
);
2967 r
= serialize_item_escaped(f
, "status-text", s
->status_text
);
2971 service_serialize_exec_command(u
, f
, s
->control_command
);
2972 service_serialize_exec_command(u
, f
, s
->main_command
);
2974 r
= serialize_fd(f
, fds
, "stdin-fd", s
->stdin_fd
);
2977 r
= serialize_fd(f
, fds
, "stdout-fd", s
->stdout_fd
);
2980 r
= serialize_fd(f
, fds
, "stderr-fd", s
->stderr_fd
);
2984 if (s
->exec_fd_event_source
) {
2985 r
= serialize_fd(f
, fds
, "exec-fd", sd_event_source_get_io_fd(s
->exec_fd_event_source
));
2989 (void) serialize_bool(f
, "exec-fd-hot", s
->exec_fd_hot
);
2992 if (UNIT_ISSET(s
->accept_socket
)) {
2993 r
= serialize_item(f
, "accept-socket", UNIT_DEREF(s
->accept_socket
)->id
);
2998 r
= serialize_fd(f
, fds
, "socket-fd", s
->socket_fd
);
3002 LIST_FOREACH(fd_store
, fs
, s
->fd_store
) {
3003 _cleanup_free_
char *c
= NULL
;
3006 copy
= fdset_put_dup(fds
, fs
->fd
);
3008 return log_error_errno(copy
, "Failed to copy file descriptor for serialization: %m");
3010 c
= cescape(fs
->fdname
);
3014 (void) serialize_item_format(f
, "fd-store-fd", "%i \"%s\" %i", copy
, c
, fs
->do_poll
);
3017 if (s
->main_exec_status
.pid
> 0) {
3018 (void) serialize_item_format(f
, "main-exec-status-pid", PID_FMT
, s
->main_exec_status
.pid
);
3019 (void) serialize_dual_timestamp(f
, "main-exec-status-start", &s
->main_exec_status
.start_timestamp
);
3020 (void) serialize_dual_timestamp(f
, "main-exec-status-exit", &s
->main_exec_status
.exit_timestamp
);
3022 if (dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
)) {
3023 (void) serialize_item_format(f
, "main-exec-status-code", "%i", s
->main_exec_status
.code
);
3024 (void) serialize_item_format(f
, "main-exec-status-status", "%i", s
->main_exec_status
.status
);
3028 if (s
->notify_access_override
>= 0)
3029 (void) serialize_item(f
, "notify-access-override", notify_access_to_string(s
->notify_access_override
));
3031 (void) serialize_dual_timestamp(f
, "watchdog-timestamp", &s
->watchdog_timestamp
);
3032 (void) serialize_bool(f
, "forbid-restart", s
->forbid_restart
);
3034 if (s
->watchdog_override_enable
)
3035 (void) serialize_item_format(f
, "watchdog-override-usec", USEC_FMT
, s
->watchdog_override_usec
);
3037 if (s
->watchdog_original_usec
!= USEC_INFINITY
)
3038 (void) serialize_item_format(f
, "watchdog-original-usec", USEC_FMT
, s
->watchdog_original_usec
);
3040 if (s
->reload_begin_usec
!= USEC_INFINITY
)
3041 (void) serialize_item_format(f
, "reload-begin-usec", USEC_FMT
, s
->reload_begin_usec
);
3046 int service_deserialize_exec_command(
3049 const char *value
) {
3051 Service
*s
= SERVICE(u
);
3053 unsigned idx
= 0, i
;
3054 bool control
, found
= false, last
= false;
3055 ServiceExecCommand id
= _SERVICE_EXEC_COMMAND_INVALID
;
3056 ExecCommand
*command
= NULL
;
3057 _cleanup_free_
char *path
= NULL
;
3058 _cleanup_strv_free_
char **argv
= NULL
;
3060 enum ExecCommandState
{
3061 STATE_EXEC_COMMAND_TYPE
,
3062 STATE_EXEC_COMMAND_INDEX
,
3063 STATE_EXEC_COMMAND_PATH
,
3064 STATE_EXEC_COMMAND_ARGS
,
3065 _STATE_EXEC_COMMAND_MAX
,
3066 _STATE_EXEC_COMMAND_INVALID
= -EINVAL
,
3073 control
= streq(key
, "control-command");
3075 state
= STATE_EXEC_COMMAND_TYPE
;
3078 _cleanup_free_
char *arg
= NULL
;
3080 r
= extract_first_word(&value
, &arg
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3087 case STATE_EXEC_COMMAND_TYPE
:
3088 id
= service_exec_command_from_string(arg
);
3092 state
= STATE_EXEC_COMMAND_INDEX
;
3094 case STATE_EXEC_COMMAND_INDEX
:
3095 /* PID 1234 is serialized as either '1234' or '+1234'. The second form is used to
3096 * mark the last command in a sequence. We warn if the deserialized command doesn't
3097 * match what we have loaded from the unit, but we don't need to warn if that is the
3100 r
= safe_atou(arg
, &idx
);
3103 last
= arg
[0] == '+';
3105 state
= STATE_EXEC_COMMAND_PATH
;
3107 case STATE_EXEC_COMMAND_PATH
:
3108 path
= TAKE_PTR(arg
);
3109 state
= STATE_EXEC_COMMAND_ARGS
;
3111 case STATE_EXEC_COMMAND_ARGS
:
3112 r
= strv_extend(&argv
, arg
);
3117 assert_not_reached();
3121 if (state
!= STATE_EXEC_COMMAND_ARGS
)
3123 if (strv_isempty(argv
))
3124 return -EINVAL
; /* At least argv[0] must be always present. */
3126 /* Let's check whether exec command on given offset matches data that we just deserialized */
3127 for (command
= s
->exec_command
[id
], i
= 0; command
; command
= command
->command_next
, i
++) {
3131 found
= strv_equal(argv
, command
->argv
) && streq(command
->path
, path
);
3136 /* Command at the index we serialized is different, let's look for command that exactly
3137 * matches but is on different index. If there is no such command we will not resume execution. */
3138 for (command
= s
->exec_command
[id
]; command
; command
= command
->command_next
)
3139 if (strv_equal(command
->argv
, argv
) && streq(command
->path
, path
))
3143 if (command
&& control
) {
3144 s
->control_command
= command
;
3145 s
->control_command_id
= id
;
3147 s
->main_command
= command
;
3149 log_unit_debug(u
, "Current command vanished from the unit file.");
3151 log_unit_warning(u
, "Current command vanished from the unit file, execution of the command list won't be resumed.");
3156 static int service_deserialize_item(Unit
*u
, const char *key
, const char *value
, FDSet
*fds
) {
3157 Service
*s
= SERVICE(u
);
3165 if (streq(key
, "state")) {
3168 state
= service_state_from_string(value
);
3170 log_unit_debug(u
, "Failed to parse state value: %s", value
);
3172 s
->deserialized_state
= state
;
3173 } else if (streq(key
, "result")) {
3176 f
= service_result_from_string(value
);
3178 log_unit_debug(u
, "Failed to parse result value: %s", value
);
3179 else if (f
!= SERVICE_SUCCESS
)
3182 } else if (streq(key
, "reload-result")) {
3185 f
= service_result_from_string(value
);
3187 log_unit_debug(u
, "Failed to parse reload result value: %s", value
);
3188 else if (f
!= SERVICE_SUCCESS
)
3189 s
->reload_result
= f
;
3191 } else if (streq(key
, "control-pid")) {
3192 pidref_done(&s
->control_pid
);
3193 r
= pidref_set_pidstr(&s
->control_pid
, value
);
3195 log_unit_debug_errno(u
, r
, "Failed to initialize control PID '%s' from serialization, ignoring.", value
);
3196 } else if (streq(key
, "main-pid")) {
3199 if (parse_pid(value
, &pid
) < 0)
3200 log_unit_debug(u
, "Failed to parse main-pid value: %s", value
);
3202 (void) service_set_main_pid(s
, pid
);
3203 } else if (streq(key
, "main-pid-known")) {
3206 b
= parse_boolean(value
);
3208 log_unit_debug(u
, "Failed to parse main-pid-known value: %s", value
);
3210 s
->main_pid_known
= b
;
3211 } else if (streq(key
, "bus-name-good")) {
3214 b
= parse_boolean(value
);
3216 log_unit_debug(u
, "Failed to parse bus-name-good value: %s", value
);
3218 s
->bus_name_good
= b
;
3219 } else if (streq(key
, "bus-name-owner")) {
3220 r
= free_and_strdup(&s
->bus_name_owner
, value
);
3222 log_unit_error_errno(u
, r
, "Unable to deserialize current bus owner %s: %m", value
);
3223 } else if (streq(key
, "status-text")) {
3227 l
= cunescape(value
, 0, &t
);
3229 log_unit_debug_errno(u
, l
, "Failed to unescape status text '%s': %m", value
);
3231 free_and_replace(s
->status_text
, t
);
3233 } else if (streq(key
, "accept-socket")) {
3236 if (u
->type
!= UNIT_SOCKET
) {
3237 log_unit_debug(u
, "Failed to deserialize accept-socket: unit is not a socket");
3241 r
= manager_load_unit(u
->manager
, value
, NULL
, NULL
, &socket
);
3243 log_unit_debug_errno(u
, r
, "Failed to load accept-socket unit '%s': %m", value
);
3245 unit_ref_set(&s
->accept_socket
, u
, socket
);
3246 SOCKET(socket
)->n_connections
++;
3249 } else if (streq(key
, "socket-fd")) {
3252 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3253 log_unit_debug(u
, "Failed to parse socket-fd value: %s", value
);
3255 asynchronous_close(s
->socket_fd
);
3256 s
->socket_fd
= fdset_remove(fds
, fd
);
3258 } else if (streq(key
, "fd-store-fd")) {
3259 _cleanup_free_
char *fdv
= NULL
, *fdn
= NULL
, *fdp
= NULL
;
3262 r
= extract_first_word(&value
, &fdv
, NULL
, 0);
3263 if (r
<= 0 || (fd
= parse_fd(fdv
)) < 0 || !fdset_contains(fds
, fd
)) {
3264 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3268 r
= extract_first_word(&value
, &fdn
, NULL
, EXTRACT_CUNESCAPE
| EXTRACT_UNQUOTE
);
3270 log_unit_debug(u
, "Failed to parse fd-store-fd value: %s", value
);
3274 r
= extract_first_word(&value
, &fdp
, NULL
, 0);
3276 /* If the value is not present, we assume the default */
3278 } else if (r
< 0 || safe_atoi(fdp
, &do_poll
) < 0) {
3279 log_unit_debug_errno(u
, r
, "Failed to parse fd-store-fd value \"%s\": %m", value
);
3283 r
= fdset_remove(fds
, fd
);
3285 log_unit_error_errno(u
, r
, "Could not find deserialized fd %i in fdset: %m", fd
);
3290 r
= service_add_fd_store(s
, fd
, fdn
, do_poll
);
3292 log_unit_error_errno(u
, r
, "Failed to store deserialized fd %i: %m", fd
);
3295 } else if (streq(key
, "main-exec-status-pid")) {
3298 if (parse_pid(value
, &pid
) < 0)
3299 log_unit_debug(u
, "Failed to parse main-exec-status-pid value: %s", value
);
3301 s
->main_exec_status
.pid
= pid
;
3302 } else if (streq(key
, "main-exec-status-code")) {
3305 if (safe_atoi(value
, &i
) < 0)
3306 log_unit_debug(u
, "Failed to parse main-exec-status-code value: %s", value
);
3308 s
->main_exec_status
.code
= i
;
3309 } else if (streq(key
, "main-exec-status-status")) {
3312 if (safe_atoi(value
, &i
) < 0)
3313 log_unit_debug(u
, "Failed to parse main-exec-status-status value: %s", value
);
3315 s
->main_exec_status
.status
= i
;
3316 } else if (streq(key
, "main-exec-status-start"))
3317 deserialize_dual_timestamp(value
, &s
->main_exec_status
.start_timestamp
);
3318 else if (streq(key
, "main-exec-status-exit"))
3319 deserialize_dual_timestamp(value
, &s
->main_exec_status
.exit_timestamp
);
3320 else if (streq(key
, "notify-access-override")) {
3321 NotifyAccess notify_access
;
3323 notify_access
= notify_access_from_string(value
);
3324 if (notify_access
< 0)
3325 log_unit_debug(u
, "Failed to parse notify-access-override value: %s", value
);
3327 s
->notify_access_override
= notify_access
;
3328 } else if (streq(key
, "watchdog-timestamp"))
3329 deserialize_dual_timestamp(value
, &s
->watchdog_timestamp
);
3330 else if (streq(key
, "forbid-restart")) {
3333 b
= parse_boolean(value
);
3335 log_unit_debug(u
, "Failed to parse forbid-restart value: %s", value
);
3337 s
->forbid_restart
= b
;
3338 } else if (streq(key
, "stdin-fd")) {
3341 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3342 log_unit_debug(u
, "Failed to parse stdin-fd value: %s", value
);
3344 asynchronous_close(s
->stdin_fd
);
3345 s
->stdin_fd
= fdset_remove(fds
, fd
);
3346 s
->exec_context
.stdio_as_fds
= true;
3348 } else if (streq(key
, "stdout-fd")) {
3351 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3352 log_unit_debug(u
, "Failed to parse stdout-fd value: %s", value
);
3354 asynchronous_close(s
->stdout_fd
);
3355 s
->stdout_fd
= fdset_remove(fds
, fd
);
3356 s
->exec_context
.stdio_as_fds
= true;
3358 } else if (streq(key
, "stderr-fd")) {
3361 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3362 log_unit_debug(u
, "Failed to parse stderr-fd value: %s", value
);
3364 asynchronous_close(s
->stderr_fd
);
3365 s
->stderr_fd
= fdset_remove(fds
, fd
);
3366 s
->exec_context
.stdio_as_fds
= true;
3368 } else if (streq(key
, "exec-fd")) {
3371 if ((fd
= parse_fd(value
)) < 0 || !fdset_contains(fds
, fd
))
3372 log_unit_debug(u
, "Failed to parse exec-fd value: %s", value
);
3374 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3376 fd
= fdset_remove(fds
, fd
);
3377 if (service_allocate_exec_fd_event_source(s
, fd
, &s
->exec_fd_event_source
) < 0)
3380 } else if (streq(key
, "watchdog-override-usec")) {
3381 if (deserialize_usec(value
, &s
->watchdog_override_usec
) < 0)
3382 log_unit_debug(u
, "Failed to parse watchdog_override_usec value: %s", value
);
3384 s
->watchdog_override_enable
= true;
3386 } else if (streq(key
, "watchdog-original-usec")) {
3387 if (deserialize_usec(value
, &s
->watchdog_original_usec
) < 0)
3388 log_unit_debug(u
, "Failed to parse watchdog_original_usec value: %s", value
);
3390 } else if (STR_IN_SET(key
, "main-command", "control-command")) {
3391 r
= service_deserialize_exec_command(u
, key
, value
);
3393 log_unit_debug_errno(u
, r
, "Failed to parse serialized command \"%s\": %m", value
);
3395 } else if (streq(key
, "n-restarts")) {
3396 r
= safe_atou(value
, &s
->n_restarts
);
3398 log_unit_debug_errno(u
, r
, "Failed to parse serialized restart counter '%s': %m", value
);
3400 } else if (streq(key
, "flush-n-restarts")) {
3401 r
= parse_boolean(value
);
3403 log_unit_debug_errno(u
, r
, "Failed to parse serialized flush restart counter setting '%s': %m", value
);
3405 s
->flush_n_restarts
= r
;
3406 } else if (streq(key
, "reload-begin-usec")) {
3407 r
= deserialize_usec(value
, &s
->reload_begin_usec
);
3409 log_unit_debug_errno(u
, r
, "Failed to parse serialized reload begin timestamp '%s', ignoring: %m", value
);
3411 log_unit_debug(u
, "Unknown serialization key: %s", key
);
3416 static UnitActiveState
service_active_state(Unit
*u
) {
3417 const UnitActiveState
*table
;
3421 table
= SERVICE(u
)->type
== SERVICE_IDLE
? state_translation_table_idle
: state_translation_table
;
3423 return table
[SERVICE(u
)->state
];
3426 static const char *service_sub_state_to_string(Unit
*u
) {
3429 return service_state_to_string(SERVICE(u
)->state
);
3432 static bool service_may_gc(Unit
*u
) {
3433 Service
*s
= SERVICE(u
);
3437 /* Never clean up services that still have a process around, even if the service is formally dead. Note that
3438 * unit_may_gc() already checked our cgroup for us, we just check our two additional PIDs, too, in case they
3439 * have moved outside of the cgroup. */
3441 if (main_pid_good(s
) > 0 ||
3442 control_pid_good(s
) > 0)
3445 /* Only allow collection of actually dead services, i.e. not those that are in the transitionary
3446 * SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART states. */
3447 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
3453 static int service_retry_pid_file(Service
*s
) {
3456 assert(s
->pid_file
);
3457 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3459 r
= service_load_pid_file(s
, false);
3463 service_unwatch_pid_file(s
);
3465 service_enter_running(s
, SERVICE_SUCCESS
);
3469 static int service_watch_pid_file(Service
*s
) {
3472 log_unit_debug(UNIT(s
), "Setting watch for PID file %s", s
->pid_file_pathspec
->path
);
3474 r
= path_spec_watch(s
->pid_file_pathspec
, service_dispatch_inotify_io
);
3476 log_unit_error_errno(UNIT(s
), r
, "Failed to set a watch for PID file %s: %m", s
->pid_file_pathspec
->path
);
3477 service_unwatch_pid_file(s
);
3481 /* the pidfile might have appeared just before we set the watch */
3482 log_unit_debug(UNIT(s
), "Trying to read PID file %s in case it changed", s
->pid_file_pathspec
->path
);
3483 service_retry_pid_file(s
);
3488 static int service_demand_pid_file(Service
*s
) {
3489 _cleanup_free_ PathSpec
*ps
= NULL
;
3491 assert(s
->pid_file
);
3492 assert(!s
->pid_file_pathspec
);
3494 ps
= new(PathSpec
, 1);
3500 .path
= strdup(s
->pid_file
),
3501 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that keep their PID file
3502 * open all the time. */
3503 .type
= PATH_MODIFIED
,
3504 .inotify_fd
= -EBADF
,
3510 path_simplify(ps
->path
);
3512 s
->pid_file_pathspec
= TAKE_PTR(ps
);
3514 return service_watch_pid_file(s
);
3517 static int service_dispatch_inotify_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3518 PathSpec
*p
= ASSERT_PTR(userdata
);
3521 s
= SERVICE(p
->unit
);
3525 assert(IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
));
3526 assert(s
->pid_file_pathspec
);
3527 assert(path_spec_owns_inotify_fd(s
->pid_file_pathspec
, fd
));
3529 log_unit_debug(UNIT(s
), "inotify event");
3531 if (path_spec_fd_event(p
, events
) < 0)
3534 if (service_retry_pid_file(s
) == 0)
3537 if (service_watch_pid_file(s
) < 0)
3543 service_unwatch_pid_file(s
);
3544 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_RESOURCES
);
3548 static int service_dispatch_exec_io(sd_event_source
*source
, int fd
, uint32_t events
, void *userdata
) {
3549 Service
*s
= SERVICE(userdata
);
3553 log_unit_debug(UNIT(s
), "got exec-fd event");
3555 /* If Type=exec is set, we'll consider a service started successfully the instant we invoked execve()
3556 * successfully for it. We implement this through a pipe() towards the child, which the kernel automatically
3557 * closes for us due to O_CLOEXEC on execve() in the child, which then triggers EOF on the pipe in the
3558 * parent. We need to be careful however, as there are other reasons that we might cause the child's side of
3559 * the pipe to be closed (for example, a simple exit()). To deal with that we'll ignore EOFs on the pipe unless
3560 * the child signalled us first that it is about to call the execve(). It does so by sending us a simple
3561 * non-zero byte via the pipe. We also provide the child with a way to inform us in case execve() failed: if it
3562 * sends a zero byte we'll ignore POLLHUP on the fd again. */
3568 n
= read(fd
, &x
, sizeof(x
));
3570 if (errno
== EAGAIN
) /* O_NONBLOCK in effect → everything queued has now been processed. */
3573 return log_unit_error_errno(UNIT(s
), errno
, "Failed to read from exec_fd: %m");
3575 if (n
== 0) { /* EOF → the event we are waiting for */
3577 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3579 if (s
->exec_fd_hot
) { /* Did the child tell us to expect EOF now? */
3580 log_unit_debug(UNIT(s
), "Got EOF on exec-fd");
3582 s
->exec_fd_hot
= false;
3584 /* Nice! This is what we have been waiting for. Transition to next state. */
3585 if (s
->type
== SERVICE_EXEC
&& s
->state
== SERVICE_START
)
3586 service_enter_start_post(s
);
3588 log_unit_debug(UNIT(s
), "Got EOF on exec-fd while it was disabled, ignoring.");
3593 /* A byte was read → this turns on/off the exec fd logic */
3594 assert(n
== sizeof(x
));
3601 static void service_notify_cgroup_empty_event(Unit
*u
) {
3602 Service
*s
= SERVICE(u
);
3606 log_unit_debug(u
, "Control group is empty.");
3610 /* Waiting for SIGCHLD is usually more interesting, because it includes return
3611 * codes/signals. Which is why we ignore the cgroup events for most cases, except when we
3612 * don't know pid which to expect the SIGCHLD for. */
3615 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
3616 main_pid_good(s
) == 0 &&
3617 control_pid_good(s
) == 0) {
3618 /* No chance of getting a ready notification anymore */
3619 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3623 if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& main_pid_good(s
) <= 0)
3624 service_enter_start_post(s
);
3627 case SERVICE_START_POST
:
3628 if (s
->pid_file_pathspec
&&
3629 main_pid_good(s
) == 0 &&
3630 control_pid_good(s
) == 0) {
3632 /* Give up hoping for the daemon to write its PID file */
3633 log_unit_warning(u
, "Daemon never wrote its PID file. Failing.");
3635 service_unwatch_pid_file(s
);
3636 if (s
->state
== SERVICE_START
)
3637 service_enter_stop_post(s
, SERVICE_FAILURE_PROTOCOL
);
3639 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
3643 case SERVICE_RUNNING
:
3644 /* service_enter_running() will figure out what to do */
3645 service_enter_running(s
, SERVICE_SUCCESS
);
3648 case SERVICE_STOP_WATCHDOG
:
3649 case SERVICE_STOP_SIGTERM
:
3650 case SERVICE_STOP_SIGKILL
:
3652 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3653 service_enter_stop_post(s
, SERVICE_SUCCESS
);
3657 case SERVICE_STOP_POST
:
3658 case SERVICE_FINAL_WATCHDOG
:
3659 case SERVICE_FINAL_SIGTERM
:
3660 case SERVICE_FINAL_SIGKILL
:
3661 if (main_pid_good(s
) <= 0 && control_pid_good(s
) <= 0)
3662 service_enter_dead(s
, SERVICE_SUCCESS
, true);
3666 /* If the cgroup empty notification comes when the unit is not active, we must have failed to clean
3667 * up the cgroup earlier and should do it now. */
3668 case SERVICE_AUTO_RESTART
:
3669 case SERVICE_AUTO_RESTART_QUEUED
:
3670 unit_prune_cgroup(u
);
3678 static void service_notify_cgroup_oom_event(Unit
*u
, bool managed_oom
) {
3679 Service
*s
= SERVICE(u
);
3682 log_unit_debug(u
, "Process(es) of control group were killed by systemd-oomd.");
3684 log_unit_debug(u
, "Process of control group was killed by the OOM killer.");
3686 if (s
->oom_policy
== OOM_CONTINUE
)
3691 case SERVICE_CONDITION
:
3692 case SERVICE_START_PRE
:
3694 case SERVICE_START_POST
:
3696 if (s
->oom_policy
== OOM_STOP
)
3697 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_OOM_KILL
);
3698 else if (s
->oom_policy
== OOM_KILL
)
3699 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3703 case SERVICE_EXITED
:
3704 case SERVICE_RUNNING
:
3705 if (s
->oom_policy
== OOM_STOP
)
3706 service_enter_stop(s
, SERVICE_FAILURE_OOM_KILL
);
3707 else if (s
->oom_policy
== OOM_KILL
)
3708 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3712 case SERVICE_STOP_WATCHDOG
:
3713 case SERVICE_STOP_SIGTERM
:
3714 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3717 case SERVICE_STOP_SIGKILL
:
3718 case SERVICE_FINAL_SIGKILL
:
3719 if (s
->result
== SERVICE_SUCCESS
)
3720 s
->result
= SERVICE_FAILURE_OOM_KILL
;
3723 case SERVICE_STOP_POST
:
3724 case SERVICE_FINAL_SIGTERM
:
3725 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_OOM_KILL
);
3733 static void service_sigchld_event(Unit
*u
, pid_t pid
, int code
, int status
) {
3734 bool notify_dbus
= true;
3735 Service
*s
= SERVICE(u
);
3737 ExitClean clean_mode
;
3742 /* Oneshot services and non-SERVICE_EXEC_START commands should not be
3743 * considered daemons as they are typically not long running. */
3744 if (s
->type
== SERVICE_ONESHOT
|| (s
->control_pid
.pid
== pid
&& s
->control_command_id
!= SERVICE_EXEC_START
))
3745 clean_mode
= EXIT_CLEAN_COMMAND
;
3747 clean_mode
= EXIT_CLEAN_DAEMON
;
3749 if (is_clean_exit(code
, status
, clean_mode
, &s
->success_status
))
3750 f
= SERVICE_SUCCESS
;
3751 else if (code
== CLD_EXITED
)
3752 f
= SERVICE_FAILURE_EXIT_CODE
;
3753 else if (code
== CLD_KILLED
)
3754 f
= SERVICE_FAILURE_SIGNAL
;
3755 else if (code
== CLD_DUMPED
)
3756 f
= SERVICE_FAILURE_CORE_DUMP
;
3758 assert_not_reached();
3760 if (s
->main_pid
.pid
== pid
) {
3761 /* Clean up the exec_fd event source. We want to do this here, not later in
3762 * service_set_state(), because service_enter_stop_post() calls service_spawn().
3763 * The source owns its end of the pipe, so this will close that too. */
3764 s
->exec_fd_event_source
= sd_event_source_disable_unref(s
->exec_fd_event_source
);
3766 /* Forking services may occasionally move to a new PID.
3767 * As long as they update the PID file before exiting the old
3768 * PID, they're fine. */
3769 if (service_load_pid_file(s
, false) > 0)
3772 pidref_done(&s
->main_pid
);
3773 exec_status_exit(&s
->main_exec_status
, &s
->exec_context
, pid
, code
, status
);
3775 if (s
->main_command
) {
3776 /* If this is not a forking service than the
3777 * main process got started and hence we copy
3778 * the exit status so that it is recorded both
3779 * as main and as control process exit
3782 s
->main_command
->exec_status
= s
->main_exec_status
;
3784 if (s
->main_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3785 f
= SERVICE_SUCCESS
;
3786 } else if (s
->exec_command
[SERVICE_EXEC_START
]) {
3788 /* If this is a forked process, then we should
3789 * ignore the return value if this was
3790 * configured for the starter process */
3792 if (s
->exec_command
[SERVICE_EXEC_START
]->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3793 f
= SERVICE_SUCCESS
;
3796 unit_log_process_exit(
3799 service_exec_command_to_string(SERVICE_EXEC_START
),
3800 f
== SERVICE_SUCCESS
,
3803 if (s
->result
== SERVICE_SUCCESS
)
3806 if (s
->main_command
&&
3807 s
->main_command
->command_next
&&
3808 s
->type
== SERVICE_ONESHOT
&&
3809 f
== SERVICE_SUCCESS
) {
3811 /* There is another command to execute, so let's do that. */
3813 log_unit_debug(u
, "Running next main command for state %s.", service_state_to_string(s
->state
));
3814 service_run_next_main(s
);
3817 s
->main_command
= NULL
;
3819 /* Services with ExitType=cgroup do not act on main PID exiting, unless the cgroup is
3821 if (s
->exit_type
== SERVICE_EXIT_MAIN
|| cgroup_good(s
) <= 0) {
3822 /* The service exited, so the service is officially gone. */
3825 case SERVICE_START_POST
:
3826 case SERVICE_RELOAD
:
3827 case SERVICE_RELOAD_SIGNAL
:
3828 case SERVICE_RELOAD_NOTIFY
:
3829 /* If neither main nor control processes are running then the current
3830 * state can never exit cleanly, hence immediately terminate the
3832 if (control_pid_good(s
) <= 0)
3833 service_enter_stop(s
, f
);
3835 /* Otherwise need to wait until the operation is done. */
3839 /* Need to wait until the operation is done. */
3843 if (s
->type
== SERVICE_ONESHOT
) {
3844 /* This was our main goal, so let's go on */
3845 if (f
== SERVICE_SUCCESS
)
3846 service_enter_start_post(s
);
3848 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3850 } else if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
)) {
3851 /* Only enter running through a notification, so that the
3852 * SERVICE_START state signifies that no ready notification
3853 * has been received */
3854 if (f
!= SERVICE_SUCCESS
)
3855 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3856 else if (!s
->remain_after_exit
|| service_get_notify_access(s
) == NOTIFY_MAIN
)
3857 /* The service has never been and will never be active */
3858 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
3863 case SERVICE_RUNNING
:
3864 service_enter_running(s
, f
);
3867 case SERVICE_STOP_WATCHDOG
:
3868 case SERVICE_STOP_SIGTERM
:
3869 case SERVICE_STOP_SIGKILL
:
3871 if (control_pid_good(s
) <= 0)
3872 service_enter_stop_post(s
, f
);
3874 /* If there is still a control process, wait for that first */
3877 case SERVICE_STOP_POST
:
3879 if (control_pid_good(s
) <= 0)
3880 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
3884 case SERVICE_FINAL_WATCHDOG
:
3885 case SERVICE_FINAL_SIGTERM
:
3886 case SERVICE_FINAL_SIGKILL
:
3888 if (control_pid_good(s
) <= 0)
3889 service_enter_dead(s
, f
, true);
3893 assert_not_reached();
3895 } else if (s
->exit_type
== SERVICE_EXIT_CGROUP
&& s
->state
== SERVICE_START
)
3896 /* If a main process exits very quickly, this function might be executed
3897 * before service_dispatch_exec_io(). Since this function disabled IO events
3898 * to monitor the main process above, we need to update the state here too.
3899 * Let's consider the process is successfully launched and exited. */
3900 service_enter_start_post(s
);
3903 } else if (s
->control_pid
.pid
== pid
) {
3907 pidref_done(&s
->control_pid
);
3909 if (s
->control_command
) {
3910 exec_status_exit(&s
->control_command
->exec_status
, &s
->exec_context
, pid
, code
, status
);
3912 if (s
->control_command
->flags
& EXEC_COMMAND_IGNORE_FAILURE
)
3913 f
= SERVICE_SUCCESS
;
3916 /* ExecCondition= calls that exit with (0, 254] should invoke skip-like behavior instead of failing */
3917 if (s
->state
== SERVICE_CONDITION
) {
3918 if (f
== SERVICE_FAILURE_EXIT_CODE
&& status
< 255) {
3919 UNIT(s
)->condition_result
= false;
3920 f
= SERVICE_SKIP_CONDITION
;
3922 } else if (f
== SERVICE_SUCCESS
) {
3923 UNIT(s
)->condition_result
= true;
3928 kind
= "Condition check process";
3930 kind
= "Control process";
3931 success
= f
== SERVICE_SUCCESS
;
3934 unit_log_process_exit(
3937 service_exec_command_to_string(s
->control_command_id
),
3941 if (s
->state
!= SERVICE_RELOAD
&& s
->result
== SERVICE_SUCCESS
)
3944 if (s
->control_command
&&
3945 s
->control_command
->command_next
&&
3946 f
== SERVICE_SUCCESS
) {
3948 /* There is another command to * execute, so let's do that. */
3950 log_unit_debug(u
, "Running next control command for state %s.", service_state_to_string(s
->state
));
3951 service_run_next_control(s
);
3954 /* No further commands for this step, so let's figure out what to do next */
3956 s
->control_command
= NULL
;
3957 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
3959 log_unit_debug(u
, "Got final SIGCHLD for state %s.", service_state_to_string(s
->state
));
3963 case SERVICE_CONDITION
:
3964 if (f
== SERVICE_SUCCESS
)
3965 service_enter_start_pre(s
);
3967 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3970 case SERVICE_START_PRE
:
3971 if (f
== SERVICE_SUCCESS
)
3972 service_enter_start(s
);
3974 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3978 if (s
->type
!= SERVICE_FORKING
)
3979 /* Maybe spurious event due to a reload that changed the type? */
3982 if (f
!= SERVICE_SUCCESS
) {
3983 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
3988 bool has_start_post
;
3991 /* Let's try to load the pid file here if we can.
3992 * The PID file might actually be created by a START_POST
3993 * script. In that case don't worry if the loading fails. */
3995 has_start_post
= s
->exec_command
[SERVICE_EXEC_START_POST
];
3996 r
= service_load_pid_file(s
, !has_start_post
);
3997 if (!has_start_post
&& r
< 0) {
3998 r
= service_demand_pid_file(s
);
3999 if (r
< 0 || cgroup_good(s
) == 0)
4000 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_PROTOCOL
);
4004 service_search_main_pid(s
);
4006 service_enter_start_post(s
);
4009 case SERVICE_START_POST
:
4010 if (f
!= SERVICE_SUCCESS
) {
4011 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
4018 r
= service_load_pid_file(s
, true);
4020 r
= service_demand_pid_file(s
);
4021 if (r
< 0 || cgroup_good(s
) == 0)
4022 service_enter_stop(s
, SERVICE_FAILURE_PROTOCOL
);
4026 service_search_main_pid(s
);
4028 service_enter_running(s
, SERVICE_SUCCESS
);
4031 case SERVICE_RELOAD
:
4032 case SERVICE_RELOAD_SIGNAL
:
4033 case SERVICE_RELOAD_NOTIFY
:
4034 if (f
== SERVICE_SUCCESS
)
4035 if (service_load_pid_file(s
, true) < 0)
4036 service_search_main_pid(s
);
4038 s
->reload_result
= f
;
4040 /* If the last notification we received from the service process indicates
4041 * we are still reloading, then don't leave reloading state just yet, just
4042 * transition into SERVICE_RELOAD_NOTIFY, to wait for the READY=1 coming,
4044 if (s
->notify_state
== NOTIFY_RELOADING
)
4045 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4047 service_enter_running(s
, SERVICE_SUCCESS
);
4051 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, f
);
4054 case SERVICE_STOP_WATCHDOG
:
4055 case SERVICE_STOP_SIGTERM
:
4056 case SERVICE_STOP_SIGKILL
:
4057 if (main_pid_good(s
) <= 0)
4058 service_enter_stop_post(s
, f
);
4060 /* If there is still a service process around, wait until
4061 * that one quit, too */
4064 case SERVICE_STOP_POST
:
4065 if (main_pid_good(s
) <= 0)
4066 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, f
);
4069 case SERVICE_FINAL_WATCHDOG
:
4070 case SERVICE_FINAL_SIGTERM
:
4071 case SERVICE_FINAL_SIGKILL
:
4072 if (main_pid_good(s
) <= 0)
4073 service_enter_dead(s
, f
, true);
4076 case SERVICE_CLEANING
:
4078 if (s
->clean_result
== SERVICE_SUCCESS
)
4079 s
->clean_result
= f
;
4081 service_enter_dead(s
, SERVICE_SUCCESS
, false);
4085 assert_not_reached();
4088 } else /* Neither control nor main PID? If so, don't notify about anything */
4089 notify_dbus
= false;
4091 /* Notify clients about changed exit status */
4093 unit_add_to_dbus_queue(u
);
4095 /* We watch the main/control process otherwise we can't retrieve the unit they
4096 * belong to with cgroupv1. But if they are not our direct child, we won't get a
4097 * SIGCHLD for them. Therefore we need to look for others to watch so we can
4098 * detect when the cgroup becomes empty. Note that the control process is always
4099 * our child so it's pointless to watch all other processes. */
4100 if (!control_pid_good(s
))
4101 if (!s
->main_pid_known
|| s
->main_pid_alien
)
4102 (void) unit_enqueue_rewatch_pids(u
);
4105 static int service_dispatch_timer(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4106 Service
*s
= SERVICE(userdata
);
4109 assert(source
== s
->timer_event_source
);
4113 case SERVICE_CONDITION
:
4114 case SERVICE_START_PRE
:
4116 case SERVICE_START_POST
:
4117 switch (s
->timeout_start_failure_mode
) {
4119 case SERVICE_TIMEOUT_TERMINATE
:
4120 log_unit_warning(UNIT(s
), "%s operation timed out. Terminating.", service_state_to_string(s
->state
));
4121 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4124 case SERVICE_TIMEOUT_ABORT
:
4125 log_unit_warning(UNIT(s
), "%s operation timed out. Aborting.", service_state_to_string(s
->state
));
4126 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4129 case SERVICE_TIMEOUT_KILL
:
4130 if (s
->kill_context
.send_sigkill
) {
4131 log_unit_warning(UNIT(s
), "%s operation timed out. Killing.", service_state_to_string(s
->state
));
4132 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4134 log_unit_warning(UNIT(s
), "%s operation timed out. Skipping SIGKILL.", service_state_to_string(s
->state
));
4135 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4140 assert_not_reached();
4144 case SERVICE_RUNNING
:
4145 log_unit_warning(UNIT(s
), "Service reached runtime time limit. Stopping.");
4146 service_enter_stop(s
, SERVICE_FAILURE_TIMEOUT
);
4149 case SERVICE_RELOAD
:
4150 case SERVICE_RELOAD_SIGNAL
:
4151 case SERVICE_RELOAD_NOTIFY
:
4152 log_unit_warning(UNIT(s
), "Reload operation timed out. Killing reload process.");
4153 service_kill_control_process(s
);
4154 s
->reload_result
= SERVICE_FAILURE_TIMEOUT
;
4155 service_enter_running(s
, SERVICE_SUCCESS
);
4159 switch (s
->timeout_stop_failure_mode
) {
4161 case SERVICE_TIMEOUT_TERMINATE
:
4162 log_unit_warning(UNIT(s
), "Stopping timed out. Terminating.");
4163 service_enter_signal(s
, SERVICE_STOP_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4166 case SERVICE_TIMEOUT_ABORT
:
4167 log_unit_warning(UNIT(s
), "Stopping timed out. Aborting.");
4168 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4171 case SERVICE_TIMEOUT_KILL
:
4172 if (s
->kill_context
.send_sigkill
) {
4173 log_unit_warning(UNIT(s
), "Stopping timed out. Killing.");
4174 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4176 log_unit_warning(UNIT(s
), "Stopping timed out. Skipping SIGKILL.");
4177 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4182 assert_not_reached();
4186 case SERVICE_STOP_WATCHDOG
:
4187 if (s
->kill_context
.send_sigkill
) {
4188 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Killing.");
4189 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4191 log_unit_warning(UNIT(s
), "State 'stop-watchdog' timed out. Skipping SIGKILL.");
4192 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4196 case SERVICE_STOP_SIGTERM
:
4197 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4198 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Aborting.");
4199 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4200 } else if (s
->kill_context
.send_sigkill
) {
4201 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Killing.");
4202 service_enter_signal(s
, SERVICE_STOP_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4204 log_unit_warning(UNIT(s
), "State 'stop-sigterm' timed out. Skipping SIGKILL.");
4205 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4210 case SERVICE_STOP_SIGKILL
:
4211 /* Uh, we sent a SIGKILL and it is still not gone?
4212 * Must be something we cannot kill, so let's just be
4213 * weirded out and continue */
4215 log_unit_warning(UNIT(s
), "Processes still around after SIGKILL. Ignoring.");
4216 service_enter_stop_post(s
, SERVICE_FAILURE_TIMEOUT
);
4219 case SERVICE_STOP_POST
:
4220 switch (s
->timeout_stop_failure_mode
) {
4222 case SERVICE_TIMEOUT_TERMINATE
:
4223 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Terminating.");
4224 service_enter_signal(s
, SERVICE_FINAL_SIGTERM
, SERVICE_FAILURE_TIMEOUT
);
4227 case SERVICE_TIMEOUT_ABORT
:
4228 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Aborting.");
4229 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4232 case SERVICE_TIMEOUT_KILL
:
4233 if (s
->kill_context
.send_sigkill
) {
4234 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Killing.");
4235 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4237 log_unit_warning(UNIT(s
), "State 'stop-post' timed out. Skipping SIGKILL. Entering failed mode.");
4238 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4243 assert_not_reached();
4247 case SERVICE_FINAL_WATCHDOG
:
4248 if (s
->kill_context
.send_sigkill
) {
4249 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Killing.");
4250 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4252 log_unit_warning(UNIT(s
), "State 'final-watchdog' timed out. Skipping SIGKILL. Entering failed mode.");
4253 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4257 case SERVICE_FINAL_SIGTERM
:
4258 if (s
->timeout_stop_failure_mode
== SERVICE_TIMEOUT_ABORT
) {
4259 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Aborting.");
4260 service_enter_signal(s
, SERVICE_FINAL_WATCHDOG
, SERVICE_FAILURE_TIMEOUT
);
4261 } else if (s
->kill_context
.send_sigkill
) {
4262 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Killing.");
4263 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, SERVICE_FAILURE_TIMEOUT
);
4265 log_unit_warning(UNIT(s
), "State 'final-sigterm' timed out. Skipping SIGKILL. Entering failed mode.");
4266 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, false);
4271 case SERVICE_FINAL_SIGKILL
:
4272 log_unit_warning(UNIT(s
), "Processes still around after final SIGKILL. Entering failed mode.");
4273 service_enter_dead(s
, SERVICE_FAILURE_TIMEOUT
, true);
4276 case SERVICE_AUTO_RESTART
:
4277 if (s
->restart_usec
> 0)
4278 log_unit_debug(UNIT(s
),
4279 "Service restart interval %s expired, scheduling restart.",
4280 FORMAT_TIMESPAN(service_restart_usec_next(s
), USEC_PER_SEC
));
4282 log_unit_debug(UNIT(s
),
4283 "Service has no hold-off time (RestartSec=0), scheduling restart.");
4285 service_enter_restart(s
);
4288 case SERVICE_CLEANING
:
4289 log_unit_warning(UNIT(s
), "Cleaning timed out. killing.");
4291 if (s
->clean_result
== SERVICE_SUCCESS
)
4292 s
->clean_result
= SERVICE_FAILURE_TIMEOUT
;
4294 service_enter_signal(s
, SERVICE_FINAL_SIGKILL
, 0);
4298 assert_not_reached();
4304 static int service_dispatch_watchdog(sd_event_source
*source
, usec_t usec
, void *userdata
) {
4305 Service
*s
= SERVICE(userdata
);
4306 usec_t watchdog_usec
;
4309 assert(source
== s
->watchdog_event_source
);
4311 watchdog_usec
= service_get_watchdog_usec(s
);
4313 if (UNIT(s
)->manager
->service_watchdogs
) {
4314 log_unit_error(UNIT(s
), "Watchdog timeout (limit %s)!",
4315 FORMAT_TIMESPAN(watchdog_usec
, 1));
4317 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4319 log_unit_warning(UNIT(s
), "Watchdog disabled! Ignoring watchdog timeout (limit %s)!",
4320 FORMAT_TIMESPAN(watchdog_usec
, 1));
4325 static bool service_notify_message_authorized(Service
*s
, pid_t pid
, FDSet
*fds
) {
4328 NotifyAccess notify_access
= service_get_notify_access(s
);
4330 if (notify_access
== NOTIFY_NONE
) {
4331 log_unit_warning(UNIT(s
), "Got notification message from PID "PID_FMT
", but reception is disabled.", pid
);
4335 if (notify_access
== NOTIFY_MAIN
&& pid
!= s
->main_pid
.pid
) {
4336 if (pidref_is_set(&s
->main_pid
))
4337 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
.pid
);
4339 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
);
4344 if (notify_access
== NOTIFY_EXEC
&& pid
!= s
->main_pid
.pid
&& pid
!= s
->control_pid
.pid
) {
4345 if (pidref_is_set(&s
->main_pid
) && pidref_is_set(&s
->control_pid
))
4346 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
,
4347 pid
, s
->main_pid
.pid
, s
->control_pid
.pid
);
4348 else if (pidref_is_set(&s
->main_pid
))
4349 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
.pid
);
4350 else if (pidref_is_set(&s
->control_pid
))
4351 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
.pid
);
4353 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
);
4361 static void service_force_watchdog(Service
*s
) {
4362 if (!UNIT(s
)->manager
->service_watchdogs
)
4365 log_unit_error(UNIT(s
), "Watchdog request (last status: %s)!",
4366 s
->status_text
?: "<unset>");
4368 service_enter_signal(s
, SERVICE_STOP_WATCHDOG
, SERVICE_FAILURE_WATCHDOG
);
4371 static void service_notify_message(
4373 const struct ucred
*ucred
,
4377 Service
*s
= SERVICE(u
);
4378 bool notify_dbus
= false;
4379 usec_t monotonic_usec
= USEC_INFINITY
;
4386 if (!service_notify_message_authorized(s
, ucred
->pid
, fds
))
4389 if (DEBUG_LOGGING
) {
4390 _cleanup_free_
char *cc
= NULL
;
4392 cc
= strv_join(tags
, ", ");
4393 log_unit_debug(u
, "Got notification message from PID "PID_FMT
" (%s)", ucred
->pid
, empty_to_na(cc
));
4396 /* Interpret MAINPID= */
4397 e
= strv_find_startswith(tags
, "MAINPID=");
4398 if (e
&& IN_SET(s
->state
, SERVICE_START
, SERVICE_START_POST
, SERVICE_RUNNING
, SERVICE_RELOAD
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
)) {
4401 if (parse_pid(e
, &new_main_pid
) < 0)
4402 log_unit_warning(u
, "Failed to parse MAINPID= field in notification message, ignoring: %s", e
);
4403 else if (!s
->main_pid_known
|| new_main_pid
!= s
->main_pid
.pid
) {
4405 r
= service_is_suitable_main_pid(s
, new_main_pid
, LOG_WARNING
);
4407 /* The new main PID is a bit suspicious, which is OK if the sender is privileged. */
4409 if (ucred
->uid
== 0) {
4410 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
);
4413 log_unit_debug(u
, "New main PID "PID_FMT
" does not belong to service, refusing.", new_main_pid
);
4416 (void) service_set_main_pid(s
, new_main_pid
);
4418 r
= unit_watch_pid(UNIT(s
), new_main_pid
, /* exclusive= */ false);
4420 log_unit_warning_errno(UNIT(s
), r
, "Failed to watch new main PID "PID_FMT
" for service: %m", new_main_pid
);
4427 /* Parse MONOTONIC_USEC= */
4428 e
= strv_find_startswith(tags
, "MONOTONIC_USEC=");
4430 r
= safe_atou64(e
, &monotonic_usec
);
4432 log_unit_warning_errno(u
, r
, "Failed to parse MONOTONIC_USEC= field in notification message, ignoring: %s", e
);
4435 /* Interpret READY=/STOPPING=/RELOADING=. STOPPING= wins over the others, and READY= over RELOADING= */
4436 if (strv_contains(tags
, "STOPPING=1")) {
4437 s
->notify_state
= NOTIFY_STOPPING
;
4439 if (IN_SET(s
->state
, SERVICE_RUNNING
, SERVICE_RELOAD_SIGNAL
, SERVICE_RELOAD_NOTIFY
))
4440 service_enter_stop_by_notify(s
);
4444 } else if (strv_contains(tags
, "READY=1")) {
4446 s
->notify_state
= NOTIFY_READY
;
4448 /* Type=notify services inform us about completed initialization with READY=1 */
4449 if (IN_SET(s
->type
, SERVICE_NOTIFY
, SERVICE_NOTIFY_RELOAD
) &&
4450 s
->state
== SERVICE_START
)
4451 service_enter_start_post(s
);
4453 /* Sending READY=1 while we are reloading informs us that the reloading is complete. */
4454 if (s
->state
== SERVICE_RELOAD_NOTIFY
)
4455 service_enter_running(s
, SERVICE_SUCCESS
);
4457 /* Combined RELOADING=1 and READY=1? Then this is indication that the service started and
4458 * immediately finished reloading. */
4459 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4460 strv_contains(tags
, "RELOADING=1") &&
4461 monotonic_usec
!= USEC_INFINITY
&&
4462 monotonic_usec
>= s
->reload_begin_usec
) {
4463 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
4465 /* Propagate a reload explicitly */
4466 r
= manager_propagate_reload(UNIT(s
)->manager
, UNIT(s
), JOB_FAIL
, &error
);
4468 log_unit_warning(UNIT(s
), "Failed to schedule propagation of reload, ignoring: %s", bus_error_message(&error
, r
));
4470 service_enter_running(s
, SERVICE_SUCCESS
);
4475 } else if (strv_contains(tags
, "RELOADING=1")) {
4477 s
->notify_state
= NOTIFY_RELOADING
;
4479 /* Sending RELOADING=1 after we send SIGHUP to request a reload will transition
4480 * things to "reload-notify" state, where we'll wait for READY=1 to let us know the
4481 * reload is done. Note that we insist on a timestamp being sent along here, so that
4482 * we know for sure this is a reload cycle initiated *after* we sent the signal */
4483 if (s
->state
== SERVICE_RELOAD_SIGNAL
&&
4484 monotonic_usec
!= USEC_INFINITY
&&
4485 monotonic_usec
>= s
->reload_begin_usec
)
4486 /* Note, we don't call service_enter_reload_by_notify() here, because we
4487 * don't need reload propagation nor do we want to restart the time-out. */
4488 service_set_state(s
, SERVICE_RELOAD_NOTIFY
);
4490 if (s
->state
== SERVICE_RUNNING
)
4491 service_enter_reload_by_notify(s
);
4496 /* Interpret STATUS= */
4497 e
= strv_find_startswith(tags
, "STATUS=");
4499 _cleanup_free_
char *t
= NULL
;
4502 /* Note that this size limit check is mostly paranoia: since the datagram size we are willing
4503 * to process is already limited to NOTIFY_BUFFER_MAX, this limit here should never be hit. */
4504 if (strlen(e
) > STATUS_TEXT_MAX
)
4505 log_unit_warning(u
, "Status message overly long (%zu > %u), ignoring.", strlen(e
), STATUS_TEXT_MAX
);
4506 else if (!utf8_is_valid(e
))
4507 log_unit_warning(u
, "Status message in notification message is not UTF-8 clean, ignoring.");
4515 if (!streq_ptr(s
->status_text
, t
)) {
4516 free_and_replace(s
->status_text
, t
);
4521 /* Interpret NOTIFYACCESS= */
4522 e
= strv_find_startswith(tags
, "NOTIFYACCESS=");
4524 NotifyAccess notify_access
;
4526 notify_access
= notify_access_from_string(e
);
4527 if (notify_access
< 0)
4528 log_unit_warning_errno(u
, notify_access
,
4529 "Failed to parse NOTIFYACCESS= field value '%s' in notification message, ignoring: %m", e
);
4531 /* We don't need to check whether the new access mode is more strict than what is
4532 * already in use, since only the privileged process is allowed to change it
4533 * in the first place. */
4534 if (service_get_notify_access(s
) != notify_access
) {
4535 service_override_notify_access(s
, notify_access
);
4540 /* Interpret ERRNO= */
4541 e
= strv_find_startswith(tags
, "ERRNO=");
4545 status_errno
= parse_errno(e
);
4546 if (status_errno
< 0)
4547 log_unit_warning_errno(u
, status_errno
,
4548 "Failed to parse ERRNO= field value '%s' in notification message: %m", e
);
4549 else if (s
->status_errno
!= status_errno
) {
4550 s
->status_errno
= status_errno
;
4555 /* Interpret EXTEND_TIMEOUT= */
4556 e
= strv_find_startswith(tags
, "EXTEND_TIMEOUT_USEC=");
4558 usec_t extend_timeout_usec
;
4559 if (safe_atou64(e
, &extend_timeout_usec
) < 0)
4560 log_unit_warning(u
, "Failed to parse EXTEND_TIMEOUT_USEC=%s", e
);
4562 service_extend_timeout(s
, extend_timeout_usec
);
4565 /* Interpret WATCHDOG= */
4566 e
= strv_find_startswith(tags
, "WATCHDOG=");
4569 service_reset_watchdog(s
);
4570 else if (streq(e
, "trigger"))
4571 service_force_watchdog(s
);
4573 log_unit_warning(u
, "Passed WATCHDOG= field is invalid, ignoring.");
4576 e
= strv_find_startswith(tags
, "WATCHDOG_USEC=");
4578 usec_t watchdog_override_usec
;
4579 if (safe_atou64(e
, &watchdog_override_usec
) < 0)
4580 log_unit_warning(u
, "Failed to parse WATCHDOG_USEC=%s", e
);
4582 service_override_watchdog_timeout(s
, watchdog_override_usec
);
4585 /* Process FD store messages. Either FDSTOREREMOVE=1 for removal, or FDSTORE=1 for addition. In both cases,
4586 * process FDNAME= for picking the file descriptor name to use. Note that FDNAME= is required when removing
4587 * fds, but optional when pushing in new fds, for compatibility reasons. */
4588 if (strv_contains(tags
, "FDSTOREREMOVE=1")) {
4591 name
= strv_find_startswith(tags
, "FDNAME=");
4592 if (!name
|| !fdname_is_valid(name
))
4593 log_unit_warning(u
, "FDSTOREREMOVE=1 requested, but no valid file descriptor name passed, ignoring.");
4595 service_remove_fd_store(s
, name
);
4597 } else if (strv_contains(tags
, "FDSTORE=1")) {
4600 name
= strv_find_startswith(tags
, "FDNAME=");
4601 if (name
&& !fdname_is_valid(name
)) {
4602 log_unit_warning(u
, "Passed FDNAME= name is invalid, ignoring.");
4606 (void) service_add_fd_store_set(s
, fds
, name
, !strv_contains(tags
, "FDPOLL=0"));
4609 /* Notify clients about changed status or main pid */
4611 unit_add_to_dbus_queue(u
);
4614 static int service_get_timeout(Unit
*u
, usec_t
*timeout
) {
4615 Service
*s
= SERVICE(u
);
4619 if (!s
->timer_event_source
)
4622 r
= sd_event_source_get_time(s
->timer_event_source
, &t
);
4625 if (t
== USEC_INFINITY
)
4632 static usec_t
service_get_timeout_start_usec(Unit
*u
) {
4633 Service
*s
= SERVICE(ASSERT_PTR(u
));
4634 return s
->timeout_start_usec
;
4637 static bool pick_up_pid_from_bus_name(Service
*s
) {
4640 /* If the service is running but we have no main PID yet, get it from the owner of the D-Bus name */
4642 return !pidref_is_set(&s
->main_pid
) &&
4648 SERVICE_RELOAD_SIGNAL
,
4649 SERVICE_RELOAD_NOTIFY
);
4652 static int bus_name_pid_lookup_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*ret_error
) {
4653 const sd_bus_error
*e
;
4654 Unit
*u
= ASSERT_PTR(userdata
);
4662 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4664 if (!s
->bus_name
|| !pick_up_pid_from_bus_name(s
))
4667 e
= sd_bus_message_get_error(reply
);
4669 r
= sd_bus_error_get_errno(e
);
4670 log_warning_errno(r
, "GetConnectionUnixProcessID() failed: %s", bus_error_message(e
, r
));
4674 r
= sd_bus_message_read(reply
, "u", &pid
);
4676 bus_log_parse_error(r
);
4680 if (!pid_is_valid(pid
)) {
4681 log_debug_errno(SYNTHETIC_ERRNO(EINVAL
), "GetConnectionUnixProcessID() returned invalid PID");
4685 log_unit_debug(u
, "D-Bus name %s is now owned by process " PID_FMT
, s
->bus_name
, (pid_t
) pid
);
4687 (void) service_set_main_pid(s
, pid
);
4688 (void) unit_watch_pid(UNIT(s
), pid
, /* exclusive= */ false);
4692 static void service_bus_name_owner_change(Unit
*u
, const char *new_owner
) {
4694 Service
*s
= SERVICE(u
);
4700 log_unit_debug(u
, "D-Bus name %s now owned by %s", s
->bus_name
, new_owner
);
4702 log_unit_debug(u
, "D-Bus name %s now not owned by anyone.", s
->bus_name
);
4704 s
->bus_name_good
= new_owner
;
4706 /* Track the current owner, so we can reconstruct changes after a daemon reload */
4707 r
= free_and_strdup(&s
->bus_name_owner
, new_owner
);
4709 log_unit_error_errno(u
, r
, "Unable to set new bus name owner %s: %m", new_owner
);
4713 if (s
->type
== SERVICE_DBUS
) {
4715 /* service_enter_running() will figure out what to
4717 if (s
->state
== SERVICE_RUNNING
)
4718 service_enter_running(s
, SERVICE_SUCCESS
);
4719 else if (s
->state
== SERVICE_START
&& new_owner
)
4720 service_enter_start_post(s
);
4722 } else if (new_owner
&& pick_up_pid_from_bus_name(s
)) {
4724 /* Try to acquire PID from bus service */
4726 s
->bus_name_pid_lookup_slot
= sd_bus_slot_unref(s
->bus_name_pid_lookup_slot
);
4728 r
= sd_bus_call_method_async(
4729 u
->manager
->api_bus
,
4730 &s
->bus_name_pid_lookup_slot
,
4731 "org.freedesktop.DBus",
4732 "/org/freedesktop/DBus",
4733 "org.freedesktop.DBus",
4734 "GetConnectionUnixProcessID",
4735 bus_name_pid_lookup_callback
,
4740 log_debug_errno(r
, "Failed to request owner PID of service name, ignoring: %m");
4744 int service_set_socket_fd(
4749 bool selinux_context_net
) {
4751 _cleanup_free_
char *peer_text
= NULL
;
4757 /* This is called by the socket code when instantiating a new service for a stream socket and the socket needs
4758 * to be configured. We take ownership of the passed fd on success. */
4760 if (UNIT(s
)->load_state
!= UNIT_LOADED
)
4763 if (s
->socket_fd
>= 0)
4766 assert(!s
->socket_peer
);
4768 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4771 if (getpeername_pretty(fd
, true, &peer_text
) >= 0) {
4773 if (UNIT(s
)->description
) {
4774 _cleanup_free_
char *a
= NULL
;
4776 a
= strjoin(UNIT(s
)->description
, " (", peer_text
, ")");
4780 r
= unit_set_description(UNIT(s
), a
);
4782 r
= unit_set_description(UNIT(s
), peer_text
);
4787 r
= unit_add_two_dependencies(UNIT(sock
), UNIT_BEFORE
, UNIT_TRIGGERS
, UNIT(s
), false, UNIT_DEPENDENCY_IMPLICIT
);
4792 s
->socket_peer
= socket_peer_ref(peer
);
4793 s
->socket_fd_selinux_context_net
= selinux_context_net
;
4795 unit_ref_set(&s
->accept_socket
, UNIT(s
), UNIT(sock
));
4799 static void service_reset_failed(Unit
*u
) {
4800 Service
*s
= SERVICE(u
);
4804 if (s
->state
== SERVICE_FAILED
)
4805 service_set_state(s
, service_determine_dead_state(s
));
4807 s
->result
= SERVICE_SUCCESS
;
4808 s
->reload_result
= SERVICE_SUCCESS
;
4809 s
->clean_result
= SERVICE_SUCCESS
;
4811 s
->flush_n_restarts
= false;
4814 static PidRef
* service_main_pid(Unit
*u
) {
4815 return &ASSERT_PTR(SERVICE(u
))->main_pid
;
4818 static PidRef
* service_control_pid(Unit
*u
) {
4819 return &ASSERT_PTR(SERVICE(u
))->control_pid
;
4822 static bool service_needs_console(Unit
*u
) {
4823 Service
*s
= SERVICE(u
);
4827 /* We provide our own implementation of this here, instead of relying of the generic implementation
4828 * unit_needs_console() provides, since we want to return false if we are in SERVICE_EXITED state. */
4830 if (!exec_context_may_touch_console(&s
->exec_context
))
4833 return IN_SET(s
->state
,
4840 SERVICE_RELOAD_SIGNAL
,
4841 SERVICE_RELOAD_NOTIFY
,
4843 SERVICE_STOP_WATCHDOG
,
4844 SERVICE_STOP_SIGTERM
,
4845 SERVICE_STOP_SIGKILL
,
4847 SERVICE_FINAL_WATCHDOG
,
4848 SERVICE_FINAL_SIGTERM
,
4849 SERVICE_FINAL_SIGKILL
);
4852 static int service_exit_status(Unit
*u
) {
4853 Service
*s
= SERVICE(u
);
4857 if (s
->main_exec_status
.pid
<= 0 ||
4858 !dual_timestamp_is_set(&s
->main_exec_status
.exit_timestamp
))
4861 if (s
->main_exec_status
.code
!= CLD_EXITED
)
4864 return s
->main_exec_status
.status
;
4867 static const char* service_status_text(Unit
*u
) {
4868 Service
*s
= SERVICE(u
);
4872 return s
->status_text
;
4875 static int service_clean(Unit
*u
, ExecCleanMask mask
) {
4876 _cleanup_strv_free_
char **l
= NULL
;
4877 bool may_clean_fdstore
= false;
4878 Service
*s
= SERVICE(u
);
4884 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_DEAD_RESOURCES_PINNED
))
4887 /* Determine if there's anything we could potentially clean */
4888 r
= exec_context_get_clean_directories(&s
->exec_context
, u
->manager
->prefix
, mask
, &l
);
4892 if (mask
& EXEC_CLEAN_FDSTORE
)
4893 may_clean_fdstore
= s
->n_fd_store
> 0 || s
->n_fd_store_max
> 0;
4895 if (strv_isempty(l
) && !may_clean_fdstore
)
4896 return -EUNATCH
; /* Nothing to potentially clean */
4898 /* Let's clean the stuff we can clean quickly */
4899 if (may_clean_fdstore
)
4900 service_release_fd_store(s
);
4902 /* If we are done, leave quickly */
4903 if (strv_isempty(l
)) {
4904 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
4905 service_set_state(s
, SERVICE_DEAD
);
4909 /* We need to clean disk stuff. This is slow, hence do it out of process, and change state */
4910 service_unwatch_control_pid(s
);
4911 s
->clean_result
= SERVICE_SUCCESS
;
4912 s
->control_command
= NULL
;
4913 s
->control_command_id
= _SERVICE_EXEC_COMMAND_INVALID
;
4915 r
= service_arm_timer(s
, /* relative= */ true, s
->exec_context
.timeout_clean_usec
);
4917 log_unit_warning_errno(u
, r
, "Failed to install timer: %m");
4921 r
= unit_fork_and_watch_rm_rf(u
, l
, &s
->control_pid
);
4923 log_unit_warning_errno(u
, r
, "Failed to spawn cleaning task: %m");
4927 service_set_state(s
, SERVICE_CLEANING
);
4931 s
->clean_result
= SERVICE_FAILURE_RESOURCES
;
4932 s
->timer_event_source
= sd_event_source_disable_unref(s
->timer_event_source
);
4936 static int service_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
4937 Service
*s
= SERVICE(u
);
4938 ExecCleanMask mask
= 0;
4944 r
= exec_context_get_clean_mask(&s
->exec_context
, &mask
);
4948 if (s
->n_fd_store_max
> 0)
4949 mask
|= EXEC_CLEAN_FDSTORE
;
4955 static const char *service_finished_job(Unit
*u
, JobType t
, JobResult result
) {
4956 if (t
== JOB_START
&&
4957 result
== JOB_DONE
&&
4958 SERVICE(u
)->type
== SERVICE_ONESHOT
)
4959 return "Finished %s.";
4961 /* Fall back to generic */
4965 static int service_can_start(Unit
*u
) {
4966 Service
*s
= SERVICE(u
);
4971 /* Make sure we don't enter a busy loop of some kind. */
4972 r
= unit_test_start_limit(u
);
4974 service_enter_dead(s
, SERVICE_FAILURE_START_LIMIT_HIT
, false);
4981 static void service_release_resources(Unit
*u
) {
4982 Service
*s
= SERVICE(ASSERT_PTR(u
));
4984 /* Invoked by the unit state engine, whenever it realizes that unit is dead and there's no job
4985 * anymore for it, and it hence is a good idea to release resources */
4987 /* Don't release resources if this is a transitionary failed/dead state
4988 * (i.e. SERVICE_DEAD_BEFORE_AUTO_RESTART/SERVICE_FAILED_BEFORE_AUTO_RESTART), insist on a permanent
4990 if (!IN_SET(s
->state
, SERVICE_DEAD
, SERVICE_FAILED
, SERVICE_DEAD_RESOURCES_PINNED
))
4993 log_unit_debug(u
, "Releasing resources...");
4995 service_release_socket_fd(s
);
4996 service_release_stdio_fd(s
);
4998 if (s
->fd_store_preserve_mode
!= EXEC_PRESERVE_YES
)
4999 service_release_fd_store(s
);
5001 if (s
->state
== SERVICE_DEAD_RESOURCES_PINNED
&& !s
->fd_store
)
5002 service_set_state(s
, SERVICE_DEAD
);
5005 static const char* const service_restart_table
[_SERVICE_RESTART_MAX
] = {
5006 [SERVICE_RESTART_NO
] = "no",
5007 [SERVICE_RESTART_ON_SUCCESS
] = "on-success",
5008 [SERVICE_RESTART_ON_FAILURE
] = "on-failure",
5009 [SERVICE_RESTART_ON_ABNORMAL
] = "on-abnormal",
5010 [SERVICE_RESTART_ON_WATCHDOG
] = "on-watchdog",
5011 [SERVICE_RESTART_ON_ABORT
] = "on-abort",
5012 [SERVICE_RESTART_ALWAYS
] = "always",
5015 DEFINE_STRING_TABLE_LOOKUP(service_restart
, ServiceRestart
);
5017 static const char* const service_restart_mode_table
[_SERVICE_RESTART_MODE_MAX
] = {
5018 [SERVICE_RESTART_MODE_NORMAL
] = "normal",
5019 [SERVICE_RESTART_MODE_DIRECT
] = "direct",
5022 DEFINE_STRING_TABLE_LOOKUP(service_restart_mode
, ServiceRestartMode
);
5024 static const char* const service_type_table
[_SERVICE_TYPE_MAX
] = {
5025 [SERVICE_SIMPLE
] = "simple",
5026 [SERVICE_FORKING
] = "forking",
5027 [SERVICE_ONESHOT
] = "oneshot",
5028 [SERVICE_DBUS
] = "dbus",
5029 [SERVICE_NOTIFY
] = "notify",
5030 [SERVICE_NOTIFY_RELOAD
] = "notify-reload",
5031 [SERVICE_IDLE
] = "idle",
5032 [SERVICE_EXEC
] = "exec",
5035 DEFINE_STRING_TABLE_LOOKUP(service_type
, ServiceType
);
5037 static const char* const service_exit_type_table
[_SERVICE_EXIT_TYPE_MAX
] = {
5038 [SERVICE_EXIT_MAIN
] = "main",
5039 [SERVICE_EXIT_CGROUP
] = "cgroup",
5042 DEFINE_STRING_TABLE_LOOKUP(service_exit_type
, ServiceExitType
);
5044 static const char* const service_exec_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5045 [SERVICE_EXEC_CONDITION
] = "ExecCondition",
5046 [SERVICE_EXEC_START_PRE
] = "ExecStartPre",
5047 [SERVICE_EXEC_START
] = "ExecStart",
5048 [SERVICE_EXEC_START_POST
] = "ExecStartPost",
5049 [SERVICE_EXEC_RELOAD
] = "ExecReload",
5050 [SERVICE_EXEC_STOP
] = "ExecStop",
5051 [SERVICE_EXEC_STOP_POST
] = "ExecStopPost",
5054 DEFINE_STRING_TABLE_LOOKUP(service_exec_command
, ServiceExecCommand
);
5056 static const char* const service_exec_ex_command_table
[_SERVICE_EXEC_COMMAND_MAX
] = {
5057 [SERVICE_EXEC_CONDITION
] = "ExecConditionEx",
5058 [SERVICE_EXEC_START_PRE
] = "ExecStartPreEx",
5059 [SERVICE_EXEC_START
] = "ExecStartEx",
5060 [SERVICE_EXEC_START_POST
] = "ExecStartPostEx",
5061 [SERVICE_EXEC_RELOAD
] = "ExecReloadEx",
5062 [SERVICE_EXEC_STOP
] = "ExecStopEx",
5063 [SERVICE_EXEC_STOP_POST
] = "ExecStopPostEx",
5066 DEFINE_STRING_TABLE_LOOKUP(service_exec_ex_command
, ServiceExecCommand
);
5068 static const char* const notify_state_table
[_NOTIFY_STATE_MAX
] = {
5069 [NOTIFY_UNKNOWN
] = "unknown",
5070 [NOTIFY_READY
] = "ready",
5071 [NOTIFY_RELOADING
] = "reloading",
5072 [NOTIFY_STOPPING
] = "stopping",
5075 DEFINE_STRING_TABLE_LOOKUP(notify_state
, NotifyState
);
5077 static const char* const service_result_table
[_SERVICE_RESULT_MAX
] = {
5078 [SERVICE_SUCCESS
] = "success",
5079 [SERVICE_FAILURE_RESOURCES
] = "resources",
5080 [SERVICE_FAILURE_PROTOCOL
] = "protocol",
5081 [SERVICE_FAILURE_TIMEOUT
] = "timeout",
5082 [SERVICE_FAILURE_EXIT_CODE
] = "exit-code",
5083 [SERVICE_FAILURE_SIGNAL
] = "signal",
5084 [SERVICE_FAILURE_CORE_DUMP
] = "core-dump",
5085 [SERVICE_FAILURE_WATCHDOG
] = "watchdog",
5086 [SERVICE_FAILURE_START_LIMIT_HIT
] = "start-limit-hit",
5087 [SERVICE_FAILURE_OOM_KILL
] = "oom-kill",
5088 [SERVICE_SKIP_CONDITION
] = "exec-condition",
5091 DEFINE_STRING_TABLE_LOOKUP(service_result
, ServiceResult
);
5093 static const char* const service_timeout_failure_mode_table
[_SERVICE_TIMEOUT_FAILURE_MODE_MAX
] = {
5094 [SERVICE_TIMEOUT_TERMINATE
] = "terminate",
5095 [SERVICE_TIMEOUT_ABORT
] = "abort",
5096 [SERVICE_TIMEOUT_KILL
] = "kill",
5099 DEFINE_STRING_TABLE_LOOKUP(service_timeout_failure_mode
, ServiceTimeoutFailureMode
);
5101 const UnitVTable service_vtable
= {
5102 .object_size
= sizeof(Service
),
5103 .exec_context_offset
= offsetof(Service
, exec_context
),
5104 .cgroup_context_offset
= offsetof(Service
, cgroup_context
),
5105 .kill_context_offset
= offsetof(Service
, kill_context
),
5106 .exec_runtime_offset
= offsetof(Service
, exec_runtime
),
5112 .private_section
= "Service",
5114 .can_transient
= true,
5115 .can_delegate
= true,
5117 .can_set_managed_oom
= true,
5119 .init
= service_init
,
5120 .done
= service_done
,
5121 .load
= service_load
,
5122 .release_resources
= service_release_resources
,
5124 .coldplug
= service_coldplug
,
5126 .dump
= service_dump
,
5128 .start
= service_start
,
5129 .stop
= service_stop
,
5130 .reload
= service_reload
,
5132 .can_reload
= service_can_reload
,
5134 .clean
= service_clean
,
5135 .can_clean
= service_can_clean
,
5137 .freeze
= unit_freeze_vtable_common
,
5138 .thaw
= unit_thaw_vtable_common
,
5140 .serialize
= service_serialize
,
5141 .deserialize_item
= service_deserialize_item
,
5143 .active_state
= service_active_state
,
5144 .sub_state_to_string
= service_sub_state_to_string
,
5146 .will_restart
= service_will_restart
,
5148 .may_gc
= service_may_gc
,
5150 .sigchld_event
= service_sigchld_event
,
5152 .reset_failed
= service_reset_failed
,
5154 .notify_cgroup_empty
= service_notify_cgroup_empty_event
,
5155 .notify_cgroup_oom
= service_notify_cgroup_oom_event
,
5156 .notify_message
= service_notify_message
,
5158 .main_pid
= service_main_pid
,
5159 .control_pid
= service_control_pid
,
5161 .bus_name_owner_change
= service_bus_name_owner_change
,
5163 .bus_set_property
= bus_service_set_property
,
5164 .bus_commit_properties
= bus_service_commit_properties
,
5166 .get_timeout
= service_get_timeout
,
5167 .get_timeout_start_usec
= service_get_timeout_start_usec
,
5168 .needs_console
= service_needs_console
,
5169 .exit_status
= service_exit_status
,
5170 .status_text
= service_status_text
,
5172 .status_message_formats
= {
5173 .finished_start_job
= {
5174 [JOB_FAILED
] = "Failed to start %s.",
5176 .finished_stop_job
= {
5177 [JOB_DONE
] = "Stopped %s.",
5178 [JOB_FAILED
] = "Stopped (with error) %s.",
5180 .finished_job
= service_finished_job
,
5183 .can_start
= service_can_start
,
5185 .notify_plymouth
= true,
5187 .audit_start_message_type
= AUDIT_SERVICE_START
,
5188 .audit_stop_message_type
= AUDIT_SERVICE_STOP
,