1 /* SPDX-License-Identifier: LGPL-2.1+ */
15 #include "alloc-util.h"
16 #include "bus-container.h"
17 #include "bus-control.h"
18 #include "bus-internal.h"
19 #include "bus-kernel.h"
20 #include "bus-label.h"
21 #include "bus-message.h"
22 #include "bus-objects.h"
23 #include "bus-protocol.h"
25 #include "bus-socket.h"
26 #include "bus-track.h"
29 #include "cgroup-util.h"
32 #include "hexdecoct.h"
33 #include "hostname-util.h"
36 #include "parse-util.h"
37 #include "process-util.h"
38 #include "string-util.h"
42 #define log_debug_bus_message(m) \
44 sd_bus_message *_mm = (m); \
45 log_debug("Got message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s", \
46 bus_message_type_to_string(_mm->header->type), \
47 strna(sd_bus_message_get_sender(_mm)), \
48 strna(sd_bus_message_get_destination(_mm)), \
49 strna(sd_bus_message_get_path(_mm)), \
50 strna(sd_bus_message_get_interface(_mm)), \
51 strna(sd_bus_message_get_member(_mm)), \
52 BUS_MESSAGE_COOKIE(_mm), \
54 strna(_mm->root_container.signature), \
55 strna(_mm->error.name), \
56 strna(_mm->error.message)); \
59 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
);
60 static void bus_detach_io_events(sd_bus
*b
);
61 static void bus_detach_inotify_event(sd_bus
*b
);
63 static thread_local sd_bus
*default_system_bus
= NULL
;
64 static thread_local sd_bus
*default_user_bus
= NULL
;
65 static thread_local sd_bus
*default_starter_bus
= NULL
;
67 static sd_bus
**bus_choose_default(int (**bus_open
)(sd_bus
**)) {
70 /* Let's try our best to reuse another cached connection. If
71 * the starter bus type is set, connect via our normal
72 * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
73 * we can share the connection with the user/system default
76 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
78 if (streq(e
, "system")) {
80 *bus_open
= sd_bus_open_system
;
81 return &default_system_bus
;
82 } else if (STR_IN_SET(e
, "user", "session")) {
84 *bus_open
= sd_bus_open_user
;
85 return &default_user_bus
;
89 /* No type is specified, so we have not other option than to
90 * use the starter address if it is set. */
91 e
= secure_getenv("DBUS_STARTER_ADDRESS");
94 *bus_open
= sd_bus_open
;
95 return &default_starter_bus
;
98 /* Finally, if nothing is set use the cached connection for
101 if (cg_pid_get_owner_uid(0, NULL
) >= 0) {
103 *bus_open
= sd_bus_open_user
;
104 return &default_user_bus
;
107 *bus_open
= sd_bus_open_system
;
108 return &default_system_bus
;
112 sd_bus
*bus_resolve(sd_bus
*bus
) {
113 switch ((uintptr_t) bus
) {
114 case (uintptr_t) SD_BUS_DEFAULT
:
115 return *(bus_choose_default(NULL
));
116 case (uintptr_t) SD_BUS_DEFAULT_USER
:
117 return default_user_bus
;
118 case (uintptr_t) SD_BUS_DEFAULT_SYSTEM
:
119 return default_system_bus
;
125 void bus_close_io_fds(sd_bus
*b
) {
128 bus_detach_io_events(b
);
130 if (b
->input_fd
!= b
->output_fd
)
131 safe_close(b
->output_fd
);
132 b
->output_fd
= b
->input_fd
= safe_close(b
->input_fd
);
135 void bus_close_inotify_fd(sd_bus
*b
) {
138 bus_detach_inotify_event(b
);
140 b
->inotify_fd
= safe_close(b
->inotify_fd
);
141 b
->inotify_watches
= mfree(b
->inotify_watches
);
142 b
->n_inotify_watches
= 0;
145 static void bus_reset_queues(sd_bus
*b
) {
148 while (b
->rqueue_size
> 0)
149 sd_bus_message_unref(b
->rqueue
[--b
->rqueue_size
]);
151 b
->rqueue
= mfree(b
->rqueue
);
152 b
->rqueue_allocated
= 0;
154 while (b
->wqueue_size
> 0)
155 sd_bus_message_unref(b
->wqueue
[--b
->wqueue_size
]);
157 b
->wqueue
= mfree(b
->wqueue
);
158 b
->wqueue_allocated
= 0;
161 static sd_bus
* bus_free(sd_bus
*b
) {
165 assert(!b
->track_queue
);
168 b
->state
= BUS_CLOSED
;
170 sd_bus_detach_event(b
);
172 while ((s
= b
->slots
)) {
173 /* At this point only floating slots can still be
174 * around, because the non-floating ones keep a
175 * reference to the bus, and we thus couldn't be
176 * destructing right now... We forcibly disconnect the
177 * slots here, so that they still can be referenced by
178 * apps, but are dead. */
181 bus_slot_disconnect(s
, true);
184 if (b
->default_bus_ptr
)
185 *b
->default_bus_ptr
= NULL
;
188 bus_close_inotify_fd(b
);
193 free(b
->unique_name
);
194 free(b
->auth_buffer
);
197 free(b
->description
);
198 free(b
->patch_sender
);
201 strv_free(b
->exec_argv
);
203 close_many(b
->fds
, b
->n_fds
);
208 ordered_hashmap_free_free(b
->reply_callbacks
);
209 prioq_free(b
->reply_callbacks_prioq
);
211 assert(b
->match_callbacks
.type
== BUS_MATCH_ROOT
);
212 bus_match_free(&b
->match_callbacks
);
214 hashmap_free_free(b
->vtable_methods
);
215 hashmap_free_free(b
->vtable_properties
);
217 assert(hashmap_isempty(b
->nodes
));
218 hashmap_free(b
->nodes
);
222 assert_se(pthread_mutex_destroy(&b
->memfd_cache_mutex
) == 0);
227 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus
*, bus_free
);
229 _public_
int sd_bus_new(sd_bus
**ret
) {
230 _cleanup_free_ sd_bus
*b
= NULL
;
232 assert_return(ret
, -EINVAL
);
239 .n_ref
= REFCNT_INIT
,
243 .message_version
= 1,
244 .creds_mask
= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
,
246 .original_pid
= getpid_cached(),
247 .n_groups
= (size_t) -1,
248 .close_on_exit
= true,
251 assert_se(pthread_mutex_init(&b
->memfd_cache_mutex
, NULL
) == 0);
253 /* We guarantee that wqueue always has space for at least one entry */
254 if (!GREEDY_REALLOC(b
->wqueue
, b
->wqueue_allocated
, 1))
261 _public_
int sd_bus_set_address(sd_bus
*bus
, const char *address
) {
262 assert_return(bus
, -EINVAL
);
263 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
264 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
265 assert_return(address
, -EINVAL
);
266 assert_return(!bus_pid_changed(bus
), -ECHILD
);
268 return free_and_strdup(&bus
->address
, address
);
271 _public_
int sd_bus_set_fd(sd_bus
*bus
, int input_fd
, int output_fd
) {
272 assert_return(bus
, -EINVAL
);
273 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
274 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
275 assert_return(input_fd
>= 0, -EBADF
);
276 assert_return(output_fd
>= 0, -EBADF
);
277 assert_return(!bus_pid_changed(bus
), -ECHILD
);
279 bus
->input_fd
= input_fd
;
280 bus
->output_fd
= output_fd
;
284 _public_
int sd_bus_set_exec(sd_bus
*bus
, const char *path
, char *const argv
[]) {
285 _cleanup_strv_free_
char **a
= NULL
;
288 assert_return(bus
, -EINVAL
);
289 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
290 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
291 assert_return(path
, -EINVAL
);
292 assert_return(!strv_isempty(argv
), -EINVAL
);
293 assert_return(!bus_pid_changed(bus
), -ECHILD
);
299 r
= free_and_strdup(&bus
->exec_path
, path
);
303 return strv_free_and_replace(bus
->exec_argv
, a
);
306 _public_
int sd_bus_set_bus_client(sd_bus
*bus
, int b
) {
307 assert_return(bus
, -EINVAL
);
308 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
309 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
310 assert_return(!bus
->patch_sender
, -EPERM
);
311 assert_return(!bus_pid_changed(bus
), -ECHILD
);
313 bus
->bus_client
= !!b
;
317 _public_
int sd_bus_set_monitor(sd_bus
*bus
, int b
) {
318 assert_return(bus
, -EINVAL
);
319 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
320 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
321 assert_return(!bus_pid_changed(bus
), -ECHILD
);
323 bus
->is_monitor
= !!b
;
327 _public_
int sd_bus_negotiate_fds(sd_bus
*bus
, int b
) {
328 assert_return(bus
, -EINVAL
);
329 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
330 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
331 assert_return(!bus_pid_changed(bus
), -ECHILD
);
333 bus
->accept_fd
= !!b
;
337 _public_
int sd_bus_negotiate_timestamp(sd_bus
*bus
, int b
) {
338 assert_return(bus
, -EINVAL
);
339 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
340 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
341 assert_return(!bus_pid_changed(bus
), -ECHILD
);
343 /* This is not actually supported by any of our transports these days, but we do honour it for synthetic
344 * replies, and maybe one day classic D-Bus learns this too */
345 bus
->attach_timestamp
= !!b
;
350 _public_
int sd_bus_negotiate_creds(sd_bus
*bus
, int b
, uint64_t mask
) {
351 assert_return(bus
, -EINVAL
);
352 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
353 assert_return(mask
<= _SD_BUS_CREDS_ALL
, -EINVAL
);
354 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
355 assert_return(!bus_pid_changed(bus
), -ECHILD
);
357 SET_FLAG(bus
->creds_mask
, mask
, b
);
359 /* The well knowns we need unconditionally, so that matches can work */
360 bus
->creds_mask
|= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
;
365 _public_
int sd_bus_set_server(sd_bus
*bus
, int b
, sd_id128_t server_id
) {
366 assert_return(bus
, -EINVAL
);
367 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
368 assert_return(b
|| sd_id128_equal(server_id
, SD_ID128_NULL
), -EINVAL
);
369 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
370 assert_return(!bus_pid_changed(bus
), -ECHILD
);
372 bus
->is_server
= !!b
;
373 bus
->server_id
= server_id
;
377 _public_
int sd_bus_set_anonymous(sd_bus
*bus
, int b
) {
378 assert_return(bus
, -EINVAL
);
379 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
380 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
381 assert_return(!bus_pid_changed(bus
), -ECHILD
);
383 bus
->anonymous_auth
= !!b
;
387 _public_
int sd_bus_set_trusted(sd_bus
*bus
, int b
) {
388 assert_return(bus
, -EINVAL
);
389 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
390 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
391 assert_return(!bus_pid_changed(bus
), -ECHILD
);
397 _public_
int sd_bus_set_description(sd_bus
*bus
, const char *description
) {
398 assert_return(bus
, -EINVAL
);
399 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
400 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
401 assert_return(!bus_pid_changed(bus
), -ECHILD
);
403 return free_and_strdup(&bus
->description
, description
);
406 _public_
int sd_bus_set_allow_interactive_authorization(sd_bus
*bus
, int b
) {
407 assert_return(bus
, -EINVAL
);
408 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
409 assert_return(!bus_pid_changed(bus
), -ECHILD
);
411 bus
->allow_interactive_authorization
= !!b
;
415 _public_
int sd_bus_get_allow_interactive_authorization(sd_bus
*bus
) {
416 assert_return(bus
, -EINVAL
);
417 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
418 assert_return(!bus_pid_changed(bus
), -ECHILD
);
420 return bus
->allow_interactive_authorization
;
423 _public_
int sd_bus_set_watch_bind(sd_bus
*bus
, int b
) {
424 assert_return(bus
, -EINVAL
);
425 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
426 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
427 assert_return(!bus_pid_changed(bus
), -ECHILD
);
429 bus
->watch_bind
= !!b
;
433 _public_
int sd_bus_get_watch_bind(sd_bus
*bus
) {
434 assert_return(bus
, -EINVAL
);
435 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
436 assert_return(!bus_pid_changed(bus
), -ECHILD
);
438 return bus
->watch_bind
;
441 _public_
int sd_bus_set_connected_signal(sd_bus
*bus
, int b
) {
442 assert_return(bus
, -EINVAL
);
443 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
444 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
445 assert_return(!bus_pid_changed(bus
), -ECHILD
);
447 bus
->connected_signal
= !!b
;
451 _public_
int sd_bus_get_connected_signal(sd_bus
*bus
) {
452 assert_return(bus
, -EINVAL
);
453 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
454 assert_return(!bus_pid_changed(bus
), -ECHILD
);
456 return bus
->connected_signal
;
459 static int synthesize_connected_signal(sd_bus
*bus
) {
460 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
465 /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called
466 * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the
467 * Hello() reply. Or in other words, whenver we enter BUS_RUNNING state.
469 * This is useful so that clients can start doing stuff whenver the connection is fully established in a way
470 * that works independently from whether we connected to a full bus or just a direct connection. */
472 if (!bus
->connected_signal
)
475 r
= sd_bus_message_new_signal(
478 "/org/freedesktop/DBus/Local",
479 "org.freedesktop.DBus.Local",
484 bus_message_set_sender_local(bus
, m
);
486 r
= bus_seal_synthetic_message(bus
, m
);
490 r
= bus_rqueue_make_room(bus
);
494 /* Insert at the very front */
495 memmove(bus
->rqueue
+ 1, bus
->rqueue
, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
496 bus
->rqueue
[0] = TAKE_PTR(m
);
502 void bus_set_state(sd_bus
*bus
, enum bus_state state
) {
504 static const char * const table
[_BUS_STATE_MAX
] = {
505 [BUS_UNSET
] = "UNSET",
506 [BUS_WATCH_BIND
] = "WATCH_BIND",
507 [BUS_OPENING
] = "OPENING",
508 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
509 [BUS_HELLO
] = "HELLO",
510 [BUS_RUNNING
] = "RUNNING",
511 [BUS_CLOSING
] = "CLOSING",
512 [BUS_CLOSED
] = "CLOSED",
516 assert(state
< _BUS_STATE_MAX
);
518 if (state
== bus
->state
)
521 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
525 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
533 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
535 r
= sd_bus_message_get_errno(reply
);
539 r
= sd_bus_message_read(reply
, "s", &s
);
543 if (!service_name_is_valid(s
) || s
[0] != ':')
546 r
= free_and_strdup(&bus
->unique_name
, s
);
550 if (bus
->state
== BUS_HELLO
) {
551 bus_set_state(bus
, BUS_RUNNING
);
553 r
= synthesize_connected_signal(bus
);
561 static int bus_send_hello(sd_bus
*bus
) {
562 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
567 if (!bus
->bus_client
)
570 r
= sd_bus_message_new_method_call(
573 "org.freedesktop.DBus",
574 "/org/freedesktop/DBus",
575 "org.freedesktop.DBus",
580 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
583 int bus_start_running(sd_bus
*bus
) {
584 struct reply_callback
*c
;
590 assert(bus
->state
< BUS_HELLO
);
592 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
593 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
594 * adding a fixed value to all entries should not alter the internal order. */
596 n
= now(CLOCK_MONOTONIC
);
597 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
598 if (c
->timeout_usec
== 0)
601 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
604 if (bus
->bus_client
) {
605 bus_set_state(bus
, BUS_HELLO
);
609 bus_set_state(bus
, BUS_RUNNING
);
611 r
= synthesize_connected_signal(bus
);
618 static int parse_address_key(const char **p
, const char *key
, char **value
) {
619 size_t l
, n
= 0, allocated
= 0;
620 _cleanup_free_
char *r
= NULL
;
629 if (strncmp(*p
, key
, l
) != 0)
642 while (!IN_SET(*a
, ';', ',', 0)) {
656 c
= (char) ((x
<< 4) | y
);
663 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
681 free_and_replace(*value
, r
);
686 static void skip_address_key(const char **p
) {
690 *p
+= strcspn(*p
, ",");
696 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
697 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
706 while (!IN_SET(**p
, 0, ';')) {
707 r
= parse_address_key(p
, "guid", guid
);
713 r
= parse_address_key(p
, "path", &path
);
719 r
= parse_address_key(p
, "abstract", &abstract
);
728 if (!path
&& !abstract
)
731 if (path
&& abstract
)
736 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
739 b
->sockaddr
.un
= (struct sockaddr_un
) {
740 .sun_family
= AF_UNIX
,
743 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
744 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
749 l
= strlen(abstract
);
750 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
753 b
->sockaddr
.un
= (struct sockaddr_un
) {
754 .sun_family
= AF_UNIX
,
757 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
758 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
766 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
767 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
769 struct addrinfo
*result
, hints
= {
770 .ai_socktype
= SOCK_STREAM
,
771 .ai_flags
= AI_ADDRCONFIG
,
779 while (!IN_SET(**p
, 0, ';')) {
780 r
= parse_address_key(p
, "guid", guid
);
786 r
= parse_address_key(p
, "host", &host
);
792 r
= parse_address_key(p
, "port", &port
);
798 r
= parse_address_key(p
, "family", &family
);
811 if (streq(family
, "ipv4"))
812 hints
.ai_family
= AF_INET
;
813 else if (streq(family
, "ipv6"))
814 hints
.ai_family
= AF_INET6
;
819 r
= getaddrinfo(host
, port
, &hints
, &result
);
823 return -EADDRNOTAVAIL
;
825 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
826 b
->sockaddr_size
= result
->ai_addrlen
;
828 freeaddrinfo(result
);
835 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
837 unsigned n_argv
= 0, j
;
839 size_t allocated
= 0;
847 while (!IN_SET(**p
, 0, ';')) {
848 r
= parse_address_key(p
, "guid", guid
);
854 r
= parse_address_key(p
, "path", &path
);
860 if (startswith(*p
, "argv")) {
864 ul
= strtoul(*p
+ 4, (char**) p
, 10);
865 if (errno
> 0 || **p
!= '=' || ul
> 256) {
873 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
881 r
= parse_address_key(p
, NULL
, argv
+ ul
);
896 /* Make sure there are no holes in the array, with the
897 * exception of argv[0] */
898 for (j
= 1; j
< n_argv
; j
++)
904 if (argv
&& argv
[0] == NULL
) {
905 argv
[0] = strdup(path
);
920 for (j
= 0; j
< n_argv
; j
++)
928 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
929 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
937 while (!IN_SET(**p
, 0, ';')) {
938 r
= parse_address_key(p
, "guid", guid
);
944 r
= parse_address_key(p
, "machine", &machine
);
950 r
= parse_address_key(p
, "pid", &pid
);
959 if (!machine
== !pid
)
963 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
966 free_and_replace(b
->machine
, machine
);
968 b
->machine
= mfree(b
->machine
);
972 r
= parse_pid(pid
, &b
->nspid
);
978 b
->sockaddr
.un
= (struct sockaddr_un
) {
979 .sun_family
= AF_UNIX
,
980 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
981 .sun_path
= "/var/run/dbus/system_bus_socket",
983 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
989 static void bus_reset_parsed_address(sd_bus
*b
) {
993 b
->sockaddr_size
= 0;
994 b
->exec_argv
= strv_free(b
->exec_argv
);
995 b
->exec_path
= mfree(b
->exec_path
);
996 b
->server_id
= SD_ID128_NULL
;
997 b
->machine
= mfree(b
->machine
);
1001 static int bus_parse_next_address(sd_bus
*b
) {
1002 _cleanup_free_
char *guid
= NULL
;
1010 if (b
->address
[b
->address_index
] == 0)
1013 bus_reset_parsed_address(b
);
1015 a
= b
->address
+ b
->address_index
;
1024 if (startswith(a
, "unix:")) {
1027 r
= parse_unix_address(b
, &a
, &guid
);
1032 } else if (startswith(a
, "tcp:")) {
1035 r
= parse_tcp_address(b
, &a
, &guid
);
1041 } else if (startswith(a
, "unixexec:")) {
1044 r
= parse_exec_address(b
, &a
, &guid
);
1050 } else if (startswith(a
, "x-machine-unix:")) {
1053 r
= parse_container_unix_address(b
, &a
, &guid
);
1066 r
= sd_id128_from_string(guid
, &b
->server_id
);
1071 b
->address_index
= a
- b
->address
;
1075 static void bus_kill_exec(sd_bus
*bus
) {
1076 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1077 sigterm_wait(bus
->busexec_pid
);
1078 bus
->busexec_pid
= 0;
1082 static int bus_start_address(sd_bus
*b
) {
1088 bus_close_io_fds(b
);
1089 bus_close_inotify_fd(b
);
1093 /* If you provide multiple different bus-addresses, we
1094 * try all of them in order and use the first one that
1098 r
= bus_socket_exec(b
);
1099 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1100 r
= bus_container_connect_socket(b
);
1101 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1102 r
= bus_socket_connect(b
);
1109 q
= bus_attach_io_events(b
);
1113 q
= bus_attach_inotify_event(b
);
1120 b
->last_connect_error
= -r
;
1123 r
= bus_parse_next_address(b
);
1127 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1131 int bus_next_address(sd_bus
*b
) {
1134 bus_reset_parsed_address(b
);
1135 return bus_start_address(b
);
1138 static int bus_start_fd(sd_bus
*b
) {
1143 assert(b
->input_fd
>= 0);
1144 assert(b
->output_fd
>= 0);
1146 r
= fd_nonblock(b
->input_fd
, true);
1150 r
= fd_cloexec(b
->input_fd
, true);
1154 if (b
->input_fd
!= b
->output_fd
) {
1155 r
= fd_nonblock(b
->output_fd
, true);
1159 r
= fd_cloexec(b
->output_fd
, true);
1164 if (fstat(b
->input_fd
, &st
) < 0)
1167 return bus_socket_take_fd(b
);
1170 _public_
int sd_bus_start(sd_bus
*bus
) {
1173 assert_return(bus
, -EINVAL
);
1174 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1175 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1176 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1178 bus_set_state(bus
, BUS_OPENING
);
1180 if (bus
->is_server
&& bus
->bus_client
)
1183 if (bus
->input_fd
>= 0)
1184 r
= bus_start_fd(bus
);
1185 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1186 r
= bus_start_address(bus
);
1195 return bus_send_hello(bus
);
1198 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1200 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1203 assert_return(ret
, -EINVAL
);
1205 /* Let's connect to the starter bus if it is set, and
1206 * otherwise to the bus that is appropropriate for the scope
1207 * we are running in */
1209 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1211 if (streq(e
, "system"))
1212 return sd_bus_open_system_with_description(ret
, description
);
1213 else if (STR_IN_SET(e
, "session", "user"))
1214 return sd_bus_open_user_with_description(ret
, description
);
1217 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1219 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1220 return sd_bus_open_user_with_description(ret
, description
);
1222 return sd_bus_open_system_with_description(ret
, description
);
1229 r
= sd_bus_set_address(b
, e
);
1233 b
->bus_client
= true;
1235 /* We don't know whether the bus is trusted or not, so better
1236 * be safe, and authenticate everything */
1238 b
->is_local
= false;
1239 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1241 r
= sd_bus_start(b
);
1249 _public_
int sd_bus_open(sd_bus
**ret
) {
1250 return sd_bus_open_with_description(ret
, NULL
);
1253 int bus_set_address_system(sd_bus
*b
) {
1257 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1259 return sd_bus_set_address(b
, e
);
1261 return sd_bus_set_address(b
, DEFAULT_SYSTEM_BUS_ADDRESS
);
1264 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1265 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1268 assert_return(ret
, -EINVAL
);
1275 r
= sd_bus_set_description(b
, description
);
1280 r
= bus_set_address_system(b
);
1284 b
->bus_client
= true;
1285 b
->is_system
= true;
1287 /* Let's do per-method access control on the system bus. We
1288 * need the caller's UID and capability set for that. */
1290 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1293 r
= sd_bus_start(b
);
1301 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1302 return sd_bus_open_system_with_description(ret
, NULL
);
1305 int bus_set_address_user(sd_bus
*b
) {
1307 _cleanup_free_
char *ee
= NULL
, *s
= NULL
;
1311 e
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1313 return sd_bus_set_address(b
, e
);
1315 e
= secure_getenv("XDG_RUNTIME_DIR");
1319 ee
= bus_address_escape(e
);
1323 if (asprintf(&s
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1326 b
->address
= TAKE_PTR(s
);
1331 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1332 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1335 assert_return(ret
, -EINVAL
);
1342 r
= sd_bus_set_description(b
, description
);
1347 r
= bus_set_address_user(b
);
1351 b
->bus_client
= true;
1354 /* We don't do any per-method access control on the user
1359 r
= sd_bus_start(b
);
1367 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1368 return sd_bus_open_user_with_description(ret
, NULL
);
1371 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1372 _cleanup_free_
char *e
= NULL
;
1373 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1378 /* Skip ":"s in ipv6 addresses */
1382 rbracket
= strchr(host
, ']');
1385 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1386 e
= bus_address_escape(t
);
1389 } else if ((a
= strchr(host
, '@'))) {
1390 if (*(a
+ 1) == '[') {
1391 _cleanup_free_
char *t
= NULL
;
1393 rbracket
= strchr(a
+ 1, ']');
1396 t
= new0(char, strlen(host
));
1399 strncat(t
, host
, a
- host
+ 1);
1400 strncat(t
, a
+ 2, rbracket
- a
- 2);
1401 e
= bus_address_escape(t
);
1404 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1408 /* Let's see if a port was given */
1409 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1412 bool got_forward_slash
= false;
1418 p
= strndupa(p
, t
- p
);
1419 got_forward_slash
= true;
1422 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1423 if (!machine_name_is_valid(p
) || got_forward_slash
)
1427 goto interpret_port_as_machine_old_syntax
;
1431 /* Let's see if a machine was given */
1432 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1435 interpret_port_as_machine_old_syntax
:
1436 /* Let's make sure this is not a port of some kind,
1437 * and is a valid machine name. */
1438 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1439 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1445 t
= strndupa(host
, strcspn(host
, ":/"));
1447 e
= bus_address_escape(t
);
1452 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1453 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1454 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1458 return free_and_replace(b
->address
, a
);
1461 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1462 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1465 assert_return(host
, -EINVAL
);
1466 assert_return(ret
, -EINVAL
);
1472 r
= bus_set_address_system_remote(b
, host
);
1476 b
->bus_client
= true;
1478 b
->is_system
= true;
1479 b
->is_local
= false;
1481 r
= sd_bus_start(b
);
1489 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1490 _cleanup_free_
char *e
= NULL
;
1496 e
= bus_address_escape(machine
);
1500 a
= strjoin("x-machine-unix:machine=", e
);
1504 return free_and_replace(b
->address
, a
);
1507 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1508 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1511 assert_return(machine
, -EINVAL
);
1512 assert_return(ret
, -EINVAL
);
1513 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1519 r
= bus_set_address_system_machine(b
, machine
);
1523 b
->bus_client
= true;
1525 b
->is_system
= true;
1526 b
->is_local
= false;
1528 r
= sd_bus_start(b
);
1536 _public_
void sd_bus_close(sd_bus
*bus
) {
1539 if (bus
->state
== BUS_CLOSED
)
1541 if (bus_pid_changed(bus
))
1544 /* Don't leave ssh hanging around */
1547 bus_set_state(bus
, BUS_CLOSED
);
1549 sd_bus_detach_event(bus
);
1551 /* Drop all queued messages so that they drop references to
1552 * the bus object and the bus may be freed */
1553 bus_reset_queues(bus
);
1555 bus_close_io_fds(bus
);
1556 bus_close_inotify_fd(bus
);
1559 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1565 return sd_bus_unref(bus
);
1568 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1572 /* Have to do this before flush() to prevent hang */
1576 return sd_bus_close_unref(bus
);
1579 void bus_enter_closing(sd_bus
*bus
) {
1582 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1585 bus_set_state(bus
, BUS_CLOSING
);
1588 DEFINE_PUBLIC_ATOMIC_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1590 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1591 assert_return(bus
, -EINVAL
);
1592 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1593 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1595 return BUS_IS_OPEN(bus
->state
);
1598 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1599 assert_return(bus
, -EINVAL
);
1600 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1601 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1603 return bus
->state
== BUS_RUNNING
;
1606 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1609 assert_return(bus
, -EINVAL
);
1610 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1611 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1612 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1614 if (bus
->is_monitor
)
1617 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1618 if (!bus
->accept_fd
)
1621 r
= bus_ensure_running(bus
);
1625 return bus
->can_fds
;
1628 return bus_type_is_valid(type
);
1631 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1634 assert_return(bus
, -EINVAL
);
1635 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1636 assert_return(id
, -EINVAL
);
1637 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1639 r
= bus_ensure_running(bus
);
1643 *id
= bus
->server_id
;
1647 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1654 /* If we copy the same message to multiple
1655 * destinations, avoid using the same cookie
1657 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1662 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1667 if (!m
->sender
&& b
->patch_sender
) {
1668 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1673 return sd_bus_message_seal(m
, ++b
->cookie
, timeout
);
1676 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1677 bool remarshal
= false;
1681 /* wrong packet version */
1682 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1685 /* wrong packet endianness */
1686 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1689 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1692 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1696 /* Fake some timestamps, if they were requested, and not
1697 * already initialized */
1698 if (b
->attach_timestamp
) {
1699 if (m
->realtime
<= 0)
1700 m
->realtime
= now(CLOCK_REALTIME
);
1702 if (m
->monotonic
<= 0)
1703 m
->monotonic
= now(CLOCK_MONOTONIC
);
1706 /* The bus specification says the serial number cannot be 0,
1707 * hence let's fill something in for synthetic messages. Since
1708 * synthetic messages might have a fake sender and we don't
1709 * want to interfere with the real sender's serial numbers we
1710 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1711 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1712 * even though kdbus can do 64bit. */
1713 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1716 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1722 r
= bus_socket_write_message(bus
, m
, idx
);
1726 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1727 log_debug("Sent message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64
" reply_cookie=%" PRIu64
" signature=%s error-name=%s error-message=%s",
1728 bus_message_type_to_string(m
->header
->type
),
1729 strna(sd_bus_message_get_sender(m
)),
1730 strna(sd_bus_message_get_destination(m
)),
1731 strna(sd_bus_message_get_path(m
)),
1732 strna(sd_bus_message_get_interface(m
)),
1733 strna(sd_bus_message_get_member(m
)),
1734 BUS_MESSAGE_COOKIE(m
),
1736 strna(m
->root_container
.signature
),
1737 strna(m
->error
.name
),
1738 strna(m
->error
.message
));
1743 static int dispatch_wqueue(sd_bus
*bus
) {
1747 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1749 while (bus
->wqueue_size
> 0) {
1751 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1755 /* Didn't do anything this time */
1757 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1758 /* Fully written. Let's drop the entry from
1761 * This isn't particularly optimized, but
1762 * well, this is supposed to be our worst-case
1763 * buffer only, and the socket buffer is
1764 * supposed to be our primary buffer, and if
1765 * it got full, then all bets are off
1769 sd_bus_message_unref(bus
->wqueue
[0]);
1770 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1780 static int bus_read_message(sd_bus
*bus
, bool hint_priority
, int64_t priority
) {
1783 return bus_socket_read_message(bus
);
1786 int bus_rqueue_make_room(sd_bus
*bus
) {
1789 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1792 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1798 static int dispatch_rqueue(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**m
) {
1803 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1805 /* Note that the priority logic is only available on kdbus,
1806 * where the rqueue is unused. We check the rqueue here
1807 * anyway, because it's simple... */
1810 if (bus
->rqueue_size
> 0) {
1811 /* Dispatch a queued message */
1813 *m
= bus
->rqueue
[0];
1815 memmove(bus
->rqueue
, bus
->rqueue
+ 1, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
1819 /* Try to read a new message */
1820 r
= bus_read_message(bus
, hint_priority
, priority
);
1830 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1831 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1834 assert_return(m
, -EINVAL
);
1839 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1841 if (!BUS_IS_OPEN(bus
->state
))
1845 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1852 /* If the cookie number isn't kept, then we know that no reply
1854 if (!cookie
&& !m
->sealed
)
1855 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1857 r
= bus_seal_message(bus
, m
, 0);
1861 /* Remarshall if we have to. This will possibly unref the
1862 * message and place a replacement in m */
1863 r
= bus_remarshal_message(bus
, &m
);
1867 /* If this is a reply and no reply was requested, then let's
1868 * suppress this, if we can */
1872 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1875 r
= bus_write_message(bus
, m
, &idx
);
1877 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
1878 bus_enter_closing(bus
);
1885 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1886 /* Wasn't fully written. So let's remember how
1887 * much was written. Note that the first entry
1888 * of the wqueue array is always allocated so
1889 * that we always can remember how much was
1891 bus
->wqueue
[0] = sd_bus_message_ref(m
);
1892 bus
->wqueue_size
= 1;
1897 /* Just append it to the queue. */
1899 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1902 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1905 bus
->wqueue
[bus
->wqueue_size
++] = sd_bus_message_ref(m
);
1910 *cookie
= BUS_MESSAGE_COOKIE(m
);
1915 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1918 assert_return(m
, -EINVAL
);
1923 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1925 if (!BUS_IS_OPEN(bus
->state
))
1928 if (!streq_ptr(m
->destination
, destination
)) {
1933 r
= sd_bus_message_set_destination(m
, destination
);
1938 return sd_bus_send(bus
, m
, cookie
);
1941 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
1944 if (usec
== (uint64_t) -1)
1947 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
1948 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
1949 * relative timestamp, and afterwards the absolute one. */
1951 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
1954 return now(CLOCK_MONOTONIC
) + usec
;
1957 static int timeout_compare(const void *a
, const void *b
) {
1958 const struct reply_callback
*x
= a
, *y
= b
;
1960 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
1963 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
1966 return CMP(x
->timeout_usec
, y
->timeout_usec
);
1969 _public_
int sd_bus_call_async(
1973 sd_bus_message_handler_t callback
,
1977 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1978 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
1981 assert_return(m
, -EINVAL
);
1982 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
1983 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
1988 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1990 if (!BUS_IS_OPEN(bus
->state
))
1993 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
1994 if (!callback
&& !slot
&& !m
->sealed
)
1995 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1997 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2001 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2005 r
= bus_seal_message(bus
, m
, usec
);
2009 r
= bus_remarshal_message(bus
, &m
);
2013 if (slot
|| callback
) {
2014 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2018 s
->reply_callback
.callback
= callback
;
2020 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2021 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2023 s
->reply_callback
.cookie
= 0;
2027 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2028 if (s
->reply_callback
.timeout_usec
!= 0) {
2029 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2031 s
->reply_callback
.timeout_usec
= 0;
2037 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2048 int bus_ensure_running(sd_bus
*bus
) {
2053 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2055 if (bus
->state
== BUS_RUNNING
)
2059 r
= sd_bus_process(bus
, NULL
);
2062 if (bus
->state
== BUS_RUNNING
)
2067 r
= sd_bus_wait(bus
, (uint64_t) -1);
2073 _public_
int sd_bus_call(
2077 sd_bus_error
*error
,
2078 sd_bus_message
**reply
) {
2080 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2086 bus_assert_return(m
, -EINVAL
, error
);
2087 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2088 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2089 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2094 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2096 if (!BUS_IS_OPEN(bus
->state
)) {
2101 r
= bus_ensure_running(bus
);
2105 i
= bus
->rqueue_size
;
2107 r
= bus_seal_message(bus
, m
, usec
);
2111 r
= bus_remarshal_message(bus
, &m
);
2115 r
= sd_bus_send(bus
, m
, &cookie
);
2119 timeout
= calc_elapse(bus
, m
->timeout
);
2124 while (i
< bus
->rqueue_size
) {
2125 sd_bus_message
*incoming
= NULL
;
2127 incoming
= bus
->rqueue
[i
];
2129 if (incoming
->reply_cookie
== cookie
) {
2130 /* Found a match! */
2132 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
2134 log_debug_bus_message(incoming
);
2136 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2138 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2142 sd_bus_message_unref(incoming
);
2147 r
= sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2148 sd_bus_message_unref(incoming
);
2151 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
) {
2152 r
= sd_bus_error_copy(error
, &incoming
->error
);
2153 sd_bus_message_unref(incoming
);
2160 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2163 streq(bus
->unique_name
, incoming
->sender
)) {
2165 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
2168 /* Our own message? Somebody is trying
2169 * to send its own client a message,
2170 * let's not dead-lock, let's fail
2173 sd_bus_message_unref(incoming
);
2178 /* Try to read more, right-away */
2182 r
= bus_read_message(bus
, false, 0);
2184 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
2185 bus_enter_closing(bus
);
2197 n
= now(CLOCK_MONOTONIC
);
2205 left
= (uint64_t) -1;
2207 r
= bus_poll(bus
, true, left
);
2215 r
= dispatch_wqueue(bus
);
2217 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
2218 bus_enter_closing(bus
);
2227 return sd_bus_error_set_errno(error
, r
);
2230 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2232 assert_return(bus
, -EINVAL
);
2233 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2234 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2235 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2237 if (bus
->state
== BUS_CLOSED
)
2240 if (bus
->inotify_fd
>= 0)
2241 return bus
->inotify_fd
;
2243 if (bus
->input_fd
>= 0)
2244 return bus
->input_fd
;
2249 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2252 assert_return(bus
, -EINVAL
);
2253 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2254 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2256 switch (bus
->state
) {
2262 case BUS_WATCH_BIND
:
2270 case BUS_AUTHENTICATING
:
2271 if (bus_socket_auth_needs_write(bus
))
2279 if (bus
->rqueue_size
<= 0)
2281 if (bus
->wqueue_size
> 0)
2289 assert_not_reached("Unknown state");
2295 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2296 struct reply_callback
*c
;
2298 assert_return(bus
, -EINVAL
);
2299 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2300 assert_return(timeout_usec
, -EINVAL
);
2301 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2303 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2306 if (bus
->track_queue
) {
2311 switch (bus
->state
) {
2313 case BUS_AUTHENTICATING
:
2314 *timeout_usec
= bus
->auth_timeout
;
2319 if (bus
->rqueue_size
> 0) {
2324 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2326 *timeout_usec
= (uint64_t) -1;
2330 if (c
->timeout_usec
== 0) {
2331 *timeout_usec
= (uint64_t) -1;
2335 *timeout_usec
= c
->timeout_usec
;
2342 case BUS_WATCH_BIND
:
2344 *timeout_usec
= (uint64_t) -1;
2348 assert_not_reached("Unknown or unexpected stat");
2352 static int process_timeout(sd_bus
*bus
) {
2353 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2354 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2355 struct reply_callback
*c
;
2362 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2364 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2368 n
= now(CLOCK_MONOTONIC
);
2369 if (c
->timeout_usec
> n
)
2372 r
= bus_message_new_synthetic_error(
2375 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2380 r
= bus_seal_synthetic_message(bus
, m
);
2384 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2385 c
->timeout_usec
= 0;
2387 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2390 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2392 bus
->iteration_counter
++;
2394 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2396 bus
->current_message
= m
;
2397 bus
->current_slot
= sd_bus_slot_ref(slot
);
2398 bus
->current_handler
= c
->callback
;
2399 bus
->current_userdata
= slot
->userdata
;
2400 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2401 bus
->current_userdata
= NULL
;
2402 bus
->current_handler
= NULL
;
2403 bus
->current_slot
= NULL
;
2404 bus
->current_message
= NULL
;
2407 bus_slot_disconnect(slot
, true);
2409 sd_bus_slot_unref(slot
);
2411 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2412 * and ignore the callback handler's return value. */
2416 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2419 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2423 if (bus
->state
!= BUS_HELLO
)
2426 /* Let's make sure the first message on the bus is the HELLO
2427 * reply. But note that we don't actually parse the message
2428 * here (we leave that to the usual handling), we just verify
2429 * we don't let any earlier msg through. */
2431 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2434 if (m
->reply_cookie
!= 1)
2440 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2441 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2442 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2443 struct reply_callback
*c
;
2451 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2454 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2457 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2463 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2465 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2467 /* If the reply contained a file descriptor which we
2468 * didn't want we pass an error instead. */
2470 r
= bus_message_new_synthetic_error(
2473 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2478 /* Copy over original timestamp */
2479 synthetic_reply
->realtime
= m
->realtime
;
2480 synthetic_reply
->monotonic
= m
->monotonic
;
2481 synthetic_reply
->seqnum
= m
->seqnum
;
2483 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2487 m
= synthetic_reply
;
2489 r
= sd_bus_message_rewind(m
, true);
2494 if (c
->timeout_usec
!= 0) {
2495 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2496 c
->timeout_usec
= 0;
2499 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2501 bus
->current_slot
= sd_bus_slot_ref(slot
);
2502 bus
->current_handler
= c
->callback
;
2503 bus
->current_userdata
= slot
->userdata
;
2504 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2505 bus
->current_userdata
= NULL
;
2506 bus
->current_handler
= NULL
;
2507 bus
->current_slot
= NULL
;
2510 bus_slot_disconnect(slot
, true);
2512 sd_bus_slot_unref(slot
);
2514 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2515 * ignore the callback handler's return value. */
2519 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2522 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2523 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2524 struct filter_callback
*l
;
2531 bus
->filter_callbacks_modified
= false;
2533 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2536 if (bus
->filter_callbacks_modified
)
2539 /* Don't run this more than once per iteration */
2540 if (l
->last_iteration
== bus
->iteration_counter
)
2543 l
->last_iteration
= bus
->iteration_counter
;
2545 r
= sd_bus_message_rewind(m
, true);
2549 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2551 bus
->current_slot
= sd_bus_slot_ref(slot
);
2552 bus
->current_handler
= l
->callback
;
2553 bus
->current_userdata
= slot
->userdata
;
2554 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2555 bus
->current_userdata
= NULL
;
2556 bus
->current_handler
= NULL
;
2557 bus
->current_slot
= sd_bus_slot_unref(slot
);
2559 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2565 } while (bus
->filter_callbacks_modified
);
2570 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2577 bus
->match_callbacks_modified
= false;
2579 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2583 } while (bus
->match_callbacks_modified
);
2588 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2589 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2595 if (bus
->is_monitor
)
2598 if (bus
->manual_peer_interface
)
2601 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2604 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2607 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2610 if (streq_ptr(m
->member
, "Ping"))
2611 r
= sd_bus_message_new_method_return(m
, &reply
);
2612 else if (streq_ptr(m
->member
, "GetMachineId")) {
2616 r
= sd_id128_get_machine(&id
);
2620 r
= sd_bus_message_new_method_return(m
, &reply
);
2624 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2626 r
= sd_bus_message_new_method_errorf(
2628 SD_BUS_ERROR_UNKNOWN_METHOD
,
2629 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2635 r
= sd_bus_send(bus
, reply
, NULL
);
2642 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2646 /* If we got a message with a file descriptor which we didn't
2647 * want to accept, then let's drop it. How can this even
2648 * happen? For example, when the kernel queues a message into
2649 * an activatable names's queue which allows fds, and then is
2650 * delivered to us later even though we ourselves did not
2653 if (bus
->is_monitor
)
2662 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2663 return 1; /* just eat it up */
2665 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2668 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2674 bus
->current_message
= m
;
2675 bus
->iteration_counter
++;
2677 log_debug_bus_message(m
);
2679 r
= process_hello(bus
, m
);
2683 r
= process_reply(bus
, m
);
2687 r
= process_fd_check(bus
, m
);
2691 r
= process_filter(bus
, m
);
2695 r
= process_match(bus
, m
);
2699 r
= process_builtin(bus
, m
);
2703 r
= bus_process_object(bus
, m
);
2706 bus
->current_message
= NULL
;
2710 static int dispatch_track(sd_bus
*bus
) {
2713 if (!bus
->track_queue
)
2716 bus_track_dispatch(bus
->track_queue
);
2720 static int process_running(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2721 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2725 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2727 r
= process_timeout(bus
);
2731 r
= dispatch_wqueue(bus
);
2735 r
= dispatch_track(bus
);
2739 r
= dispatch_rqueue(bus
, hint_priority
, priority
, &m
);
2745 r
= process_message(bus
, m
);
2750 r
= sd_bus_message_rewind(m
, true);
2759 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2761 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2762 strna(sd_bus_message_get_sender(m
)),
2763 strna(sd_bus_message_get_path(m
)),
2764 strna(sd_bus_message_get_interface(m
)),
2765 strna(sd_bus_message_get_member(m
)));
2767 r
= sd_bus_reply_method_errorf(
2769 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2770 "Unknown object '%s'.", m
->path
);
2784 static int bus_exit_now(sd_bus
*bus
) {
2787 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2788 * sd_event_exit(), otherwise invokes libc exit(). */
2790 if (bus
->exited
) /* did we already exit? */
2792 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2794 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2797 bus
->exited
= true; /* never exit more than once */
2799 log_debug("Bus connection disconnected, exiting.");
2802 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2806 assert_not_reached("exit() didn't exit?");
2809 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2810 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2811 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2818 r
= bus_message_new_synthetic_error(
2821 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2826 r
= bus_seal_synthetic_message(bus
, m
);
2830 if (c
->timeout_usec
!= 0) {
2831 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2832 c
->timeout_usec
= 0;
2835 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2838 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2840 bus
->iteration_counter
++;
2842 bus
->current_message
= m
;
2843 bus
->current_slot
= sd_bus_slot_ref(slot
);
2844 bus
->current_handler
= c
->callback
;
2845 bus
->current_userdata
= slot
->userdata
;
2846 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2847 bus
->current_userdata
= NULL
;
2848 bus
->current_handler
= NULL
;
2849 bus
->current_slot
= NULL
;
2850 bus
->current_message
= NULL
;
2853 bus_slot_disconnect(slot
, true);
2855 sd_bus_slot_unref(slot
);
2857 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2860 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2861 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2862 struct reply_callback
*c
;
2866 assert(bus
->state
== BUS_CLOSING
);
2868 /* First, fail all outstanding method calls */
2869 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2871 return process_closing_reply_callback(bus
, c
);
2873 /* Then, fake-drop all remaining bus tracking references */
2875 bus_track_close(bus
->tracks
);
2879 /* Then, synthesize a Disconnected message */
2880 r
= sd_bus_message_new_signal(
2883 "/org/freedesktop/DBus/Local",
2884 "org.freedesktop.DBus.Local",
2889 bus_message_set_sender_local(bus
, m
);
2891 r
= bus_seal_synthetic_message(bus
, m
);
2897 bus
->current_message
= m
;
2898 bus
->iteration_counter
++;
2900 r
= process_filter(bus
, m
);
2904 r
= process_match(bus
, m
);
2908 /* Nothing else to do, exit now, if the condition holds */
2909 bus
->exit_triggered
= true;
2910 (void) bus_exit_now(bus
);
2918 bus
->current_message
= NULL
;
2923 static int bus_process_internal(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2926 /* Returns 0 when we didn't do anything. This should cause the
2927 * caller to invoke sd_bus_wait() before returning the next
2928 * time. Returns > 0 when we did something, which possibly
2929 * means *ret is filled in with an unprocessed message. */
2931 assert_return(bus
, -EINVAL
);
2932 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2933 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2935 /* We don't allow recursively invoking sd_bus_process(). */
2936 assert_return(!bus
->current_message
, -EBUSY
);
2937 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
2939 BUS_DONT_DESTROY(bus
);
2941 switch (bus
->state
) {
2949 case BUS_WATCH_BIND
:
2950 r
= bus_socket_process_watch_bind(bus
);
2954 r
= bus_socket_process_opening(bus
);
2957 case BUS_AUTHENTICATING
:
2958 r
= bus_socket_process_authenticating(bus
);
2963 r
= process_running(bus
, hint_priority
, priority
, ret
);
2967 /* This branch initializes *ret, hence we don't use the generic error checking below */
2971 return process_closing(bus
, ret
);
2974 assert_not_reached("Unknown state");
2977 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
2978 bus_enter_closing(bus
);
2989 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
2990 return bus_process_internal(bus
, false, 0, ret
);
2993 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
2994 return bus_process_internal(bus
, true, priority
, ret
);
2997 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
2998 struct pollfd p
[2] = {};
3001 usec_t m
= USEC_INFINITY
;
3005 if (bus
->state
== BUS_CLOSING
)
3008 if (!BUS_IS_OPEN(bus
->state
))
3011 if (bus
->state
== BUS_WATCH_BIND
) {
3012 assert(bus
->inotify_fd
>= 0);
3014 p
[0].events
= POLLIN
;
3015 p
[0].fd
= bus
->inotify_fd
;
3020 e
= sd_bus_get_events(bus
);
3025 /* The caller really needs some more data, he doesn't
3026 * care about what's already read, or any timeouts
3027 * except its own. */
3031 /* The caller wants to process if there's something to
3032 * process, but doesn't care otherwise */
3034 r
= sd_bus_get_timeout(bus
, &until
);
3038 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3041 p
[0].fd
= bus
->input_fd
;
3042 if (bus
->output_fd
== bus
->input_fd
) {
3046 p
[0].events
= e
& POLLIN
;
3047 p
[1].fd
= bus
->output_fd
;
3048 p
[1].events
= e
& POLLOUT
;
3053 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3056 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3060 return r
> 0 ? 1 : 0;
3063 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3065 assert_return(bus
, -EINVAL
);
3066 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3067 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3069 if (bus
->state
== BUS_CLOSING
)
3072 if (!BUS_IS_OPEN(bus
->state
))
3075 if (bus
->rqueue_size
> 0)
3078 return bus_poll(bus
, false, timeout_usec
);
3081 _public_
int sd_bus_flush(sd_bus
*bus
) {
3084 assert_return(bus
, -EINVAL
);
3085 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3086 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3088 if (bus
->state
== BUS_CLOSING
)
3091 if (!BUS_IS_OPEN(bus
->state
))
3094 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3095 if (bus
->state
== BUS_WATCH_BIND
)
3098 r
= bus_ensure_running(bus
);
3102 if (bus
->wqueue_size
<= 0)
3106 r
= dispatch_wqueue(bus
);
3108 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
3109 bus_enter_closing(bus
);
3116 if (bus
->wqueue_size
<= 0)
3119 r
= bus_poll(bus
, false, (uint64_t) -1);
3125 _public_
int sd_bus_add_filter(
3128 sd_bus_message_handler_t callback
,
3133 assert_return(bus
, -EINVAL
);
3134 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3135 assert_return(callback
, -EINVAL
);
3136 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3138 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3142 s
->filter_callback
.callback
= callback
;
3144 bus
->filter_callbacks_modified
= true;
3145 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3153 static int add_match_callback(
3156 sd_bus_error
*ret_error
) {
3158 sd_bus_slot
*match_slot
= userdata
;
3159 bool failed
= false;
3165 sd_bus_slot_ref(match_slot
);
3167 if (sd_bus_message_is_method_error(m
, NULL
)) {
3168 log_debug_errno(sd_bus_message_get_errno(m
),
3169 "Unable to add match %s, failing connection: %s",
3170 match_slot
->match_callback
.match_string
,
3171 sd_bus_message_get_error(m
)->message
);
3175 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3177 if (match_slot
->match_callback
.install_callback
) {
3180 bus
= sd_bus_message_get_bus(m
);
3182 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3183 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3186 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3187 assert(bus
->current_handler
== add_match_callback
);
3188 assert(bus
->current_userdata
== userdata
);
3190 bus
->current_slot
= match_slot
;
3191 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3192 bus
->current_userdata
= match_slot
->userdata
;
3194 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3196 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3197 bus
->current_handler
= add_match_callback
;
3198 bus
->current_userdata
= userdata
;
3200 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3202 if (failed
) /* Generic failure handling: destroy the connection */
3203 bus_enter_closing(sd_bus_message_get_bus(m
));
3208 if (failed
&& match_slot
->floating
)
3209 bus_slot_disconnect(match_slot
, true);
3211 sd_bus_slot_unref(match_slot
);
3216 static int bus_add_match_full(
3221 sd_bus_message_handler_t callback
,
3222 sd_bus_message_handler_t install_callback
,
3225 struct bus_match_component
*components
= NULL
;
3226 unsigned n_components
= 0;
3227 sd_bus_slot
*s
= NULL
;
3230 assert_return(bus
, -EINVAL
);
3231 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3232 assert_return(match
, -EINVAL
);
3233 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3235 r
= bus_match_parse(match
, &components
, &n_components
);
3239 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3245 s
->match_callback
.callback
= callback
;
3246 s
->match_callback
.install_callback
= install_callback
;
3248 if (bus
->bus_client
) {
3249 enum bus_match_scope scope
;
3251 scope
= bus_match_get_scope(components
, n_components
);
3253 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3254 if (scope
!= BUS_MATCH_LOCAL
) {
3256 /* We store the original match string, so that we can use it to remove the match again. */
3258 s
->match_callback
.match_string
= strdup(match
);
3259 if (!s
->match_callback
.match_string
) {
3265 r
= bus_add_match_internal_async(bus
,
3266 &s
->match_callback
.install_slot
,
3267 s
->match_callback
.match_string
,
3274 /* Make the slot of the match call floating now. We need the reference, but we don't
3275 * want that this match pins the bus object, hence we first create it non-floating, but
3276 * then make it floating. */
3277 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3279 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
);
3283 s
->match_added
= true;
3287 bus
->match_callbacks_modified
= true;
3288 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3297 bus_match_parse_free(components
, n_components
);
3298 sd_bus_slot_unref(s
);
3303 _public_
int sd_bus_add_match(
3307 sd_bus_message_handler_t callback
,
3310 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3313 _public_
int sd_bus_add_match_async(
3317 sd_bus_message_handler_t callback
,
3318 sd_bus_message_handler_t install_callback
,
3321 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3324 bool bus_pid_changed(sd_bus
*bus
) {
3327 /* We don't support people creating a bus connection and
3328 * keeping it around over a fork(). Let's complain. */
3330 return bus
->original_pid
!= getpid_cached();
3333 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3334 sd_bus
*bus
= userdata
;
3339 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3341 r
= sd_bus_process(bus
, NULL
);
3343 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3344 bus_enter_closing(bus
);
3350 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3351 sd_bus
*bus
= userdata
;
3356 r
= sd_bus_process(bus
, NULL
);
3358 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3359 bus_enter_closing(bus
);
3365 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3366 sd_bus
*bus
= userdata
;
3373 e
= sd_bus_get_events(bus
);
3379 if (bus
->output_fd
!= bus
->input_fd
) {
3381 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3385 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3387 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3391 r
= sd_bus_get_timeout(bus
, &until
);
3397 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3404 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3411 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3412 bus_enter_closing(bus
);
3417 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3418 sd_bus
*bus
= userdata
;
3422 if (bus
->close_on_exit
) {
3430 int bus_attach_io_events(sd_bus
*bus
) {
3435 if (bus
->input_fd
< 0)
3441 if (!bus
->input_io_event_source
) {
3442 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3446 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3450 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3454 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3456 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3461 if (bus
->output_fd
!= bus
->input_fd
) {
3462 assert(bus
->output_fd
>= 0);
3464 if (!bus
->output_io_event_source
) {
3465 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3469 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3473 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3475 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3484 static void bus_detach_io_events(sd_bus
*bus
) {
3487 if (bus
->input_io_event_source
) {
3488 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3489 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3492 if (bus
->output_io_event_source
) {
3493 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3494 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3498 int bus_attach_inotify_event(sd_bus
*bus
) {
3503 if (bus
->inotify_fd
< 0)
3509 if (!bus
->inotify_event_source
) {
3510 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3514 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3518 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3520 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3527 static void bus_detach_inotify_event(sd_bus
*bus
) {
3530 if (bus
->inotify_event_source
) {
3531 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3532 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3536 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3539 assert_return(bus
, -EINVAL
);
3540 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3541 assert_return(!bus
->event
, -EBUSY
);
3543 assert(!bus
->input_io_event_source
);
3544 assert(!bus
->output_io_event_source
);
3545 assert(!bus
->time_event_source
);
3548 bus
->event
= sd_event_ref(event
);
3550 r
= sd_event_default(&bus
->event
);
3555 bus
->event_priority
= priority
;
3557 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3561 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3565 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3569 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3573 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3577 r
= bus_attach_io_events(bus
);
3581 r
= bus_attach_inotify_event(bus
);
3588 sd_bus_detach_event(bus
);
3592 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3593 assert_return(bus
, -EINVAL
);
3594 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3599 bus_detach_io_events(bus
);
3600 bus_detach_inotify_event(bus
);
3602 if (bus
->time_event_source
) {
3603 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3604 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3607 if (bus
->quit_event_source
) {
3608 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3609 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3612 bus
->event
= sd_event_unref(bus
->event
);
3616 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3617 assert_return(bus
, NULL
);
3622 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3623 assert_return(bus
, NULL
);
3625 return bus
->current_message
;
3628 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3629 assert_return(bus
, NULL
);
3631 return bus
->current_slot
;
3634 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3635 assert_return(bus
, NULL
);
3637 return bus
->current_handler
;
3640 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3641 assert_return(bus
, NULL
);
3643 return bus
->current_userdata
;
3646 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3651 assert(default_bus
);
3654 return !!*default_bus
;
3657 *ret
= sd_bus_ref(*default_bus
);
3665 b
->default_bus_ptr
= default_bus
;
3673 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3674 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3677 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3678 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3681 _public_
int sd_bus_default(sd_bus
**ret
) {
3682 int (*bus_open
)(sd_bus
**) = NULL
;
3685 busp
= bus_choose_default(&bus_open
);
3686 return bus_default(bus_open
, busp
, ret
);
3689 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3690 assert_return(b
, -EINVAL
);
3691 assert_return(tid
, -EINVAL
);
3692 assert_return(!bus_pid_changed(b
), -ECHILD
);
3700 return sd_event_get_tid(b
->event
, tid
);
3705 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3706 _cleanup_free_
char *e
= NULL
;
3709 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3710 assert_return(external_id
, -EINVAL
);
3711 assert_return(ret_path
, -EINVAL
);
3713 e
= bus_label_escape(external_id
);
3717 ret
= strjoin(prefix
, "/", e
);
3725 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3729 assert_return(object_path_is_valid(path
), -EINVAL
);
3730 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3731 assert_return(external_id
, -EINVAL
);
3733 e
= object_path_startswith(path
, prefix
);
3735 *external_id
= NULL
;
3739 ret
= bus_label_unescape(e
);
3747 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3748 _cleanup_strv_free_
char **labels
= NULL
;
3749 char *path
, *path_pos
, **label_pos
;
3750 const char *sep
, *template_pos
;
3755 assert_return(out
, -EINVAL
);
3756 assert_return(path_template
, -EINVAL
);
3758 path_length
= strlen(path_template
);
3760 va_start(list
, path_template
);
3761 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3765 arg
= va_arg(list
, const char *);
3771 label
= bus_label_escape(arg
);
3777 r
= strv_consume(&labels
, label
);
3783 /* add label length, but account for the format character */
3784 path_length
+= strlen(label
) - 1;
3788 path
= malloc(path_length
+ 1);
3795 for (template_pos
= path_template
; *template_pos
; ) {
3796 sep
= strchrnul(template_pos
, '%');
3797 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3801 path_pos
= stpcpy(path_pos
, *label_pos
++);
3802 template_pos
= sep
+ 1;
3810 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3811 _cleanup_strv_free_
char **labels
= NULL
;
3812 const char *template_pos
, *path_pos
;
3818 * This decodes an object-path based on a template argument. The
3819 * template consists of a verbatim path, optionally including special
3822 * - Each occurrence of '%' in the template matches an arbitrary
3823 * substring of a label in the given path. At most one such
3824 * directive is allowed per label. For each such directive, the
3825 * caller must provide an output parameter (char **) via va_arg. If
3826 * NULL is passed, the given label is verified, but not returned.
3827 * For each matched label, the *decoded* label is stored in the
3828 * passed output argument, and the caller is responsible to free
3829 * it. Note that the output arguments are only modified if the
3830 * actualy path matched the template. Otherwise, they're left
3833 * This function returns <0 on error, 0 if the path does not match the
3834 * template, 1 if it matched.
3837 assert_return(path
, -EINVAL
);
3838 assert_return(path_template
, -EINVAL
);
3842 for (template_pos
= path_template
; *template_pos
; ) {
3847 /* verify everything until the next '%' matches verbatim */
3848 sep
= strchrnul(template_pos
, '%');
3849 length
= sep
- template_pos
;
3850 if (strncmp(path_pos
, template_pos
, length
))
3854 template_pos
+= length
;
3859 /* We found the next '%' character. Everything up until here
3860 * matched. We now skip ahead to the end of this label and make
3861 * sure it matches the tail of the label in the path. Then we
3862 * decode the string in-between and save it for later use. */
3864 ++template_pos
; /* skip over '%' */
3866 sep
= strchrnul(template_pos
, '/');
3867 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3869 /* verify the suffixes match */
3870 sep
= strchrnul(path_pos
, '/');
3871 if (sep
- path_pos
< (ssize_t
)length
||
3872 strncmp(sep
- length
, template_pos
, length
))
3875 template_pos
+= length
; /* skip over matched label */
3876 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3878 /* store unescaped label for later use */
3879 label
= bus_label_unescape_n(path_pos
, length
);
3883 r
= strv_consume(&labels
, label
);
3887 path_pos
= sep
; /* skip decoded label and suffix */
3890 /* end of template must match end of path */
3894 /* copy the labels over to the caller */
3895 va_start(list
, path_template
);
3896 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3899 arg
= va_arg(list
, char **);
3907 labels
= mfree(labels
);
3911 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3912 assert_return(bus
, -EINVAL
);
3913 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3914 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3919 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3920 assert_return(bus
, -EINVAL
);
3921 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3922 assert_return(description
, -EINVAL
);
3923 assert_return(bus
->description
, -ENXIO
);
3924 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3926 if (bus
->description
)
3927 *description
= bus
->description
;
3928 else if (bus
->is_system
)
3929 *description
= "system";
3930 else if (bus
->is_user
)
3931 *description
= "user";
3933 *description
= NULL
;
3938 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
3939 assert_return(bus
, -EINVAL
);
3940 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3941 assert_return(scope
, -EINVAL
);
3942 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3949 if (bus
->is_system
) {
3957 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
3959 assert_return(bus
, -EINVAL
);
3960 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3961 assert_return(address
, -EINVAL
);
3962 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3965 *address
= bus
->address
;
3972 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
3973 assert_return(bus
, -EINVAL
);
3974 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3975 assert_return(mask
, -EINVAL
);
3976 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3978 *mask
= bus
->creds_mask
;
3982 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
3983 assert_return(bus
, -EINVAL
);
3984 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3985 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3987 return bus
->bus_client
;
3990 _public_
int sd_bus_is_server(sd_bus
*bus
) {
3991 assert_return(bus
, -EINVAL
);
3992 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3993 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3995 return bus
->is_server
;
3998 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
3999 assert_return(bus
, -EINVAL
);
4000 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4001 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4003 return bus
->anonymous_auth
;
4006 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4007 assert_return(bus
, -EINVAL
);
4008 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4009 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4011 return bus
->trusted
;
4014 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4015 assert_return(bus
, -EINVAL
);
4016 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4017 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4019 return bus
->is_monitor
;
4022 static void flush_close(sd_bus
*bus
) {
4026 /* Flushes and closes the specified bus. We take a ref before,
4027 * to ensure the flushing does not cause the bus to be
4030 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4033 _public_
void sd_bus_default_flush_close(void) {
4034 flush_close(default_starter_bus
);
4035 flush_close(default_user_bus
);
4036 flush_close(default_system_bus
);
4039 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4040 assert_return(bus
, -EINVAL
);
4041 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4043 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4044 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4045 * from the client side. */
4046 bus
->exit_on_disconnect
= b
;
4048 /* If the exit condition was triggered already, exit immediately. */
4049 return bus_exit_now(bus
);
4052 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4053 assert_return(bus
, -EINVAL
);
4054 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4056 return bus
->exit_on_disconnect
;
4059 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4060 assert_return(bus
, -EINVAL
);
4061 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4062 assert_return(!bus
->bus_client
, -EPERM
);
4063 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4065 return free_and_strdup(&bus
->patch_sender
, sender
);
4068 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4069 assert_return(bus
, -EINVAL
);
4070 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4071 assert_return(ret
, -EINVAL
);
4073 if (!bus
->patch_sender
)
4076 *ret
= bus
->patch_sender
;
4080 _public_
int sd_bus_get_n_queued_read(sd_bus
*bus
, uint64_t *ret
) {
4081 assert_return(bus
, -EINVAL
);
4082 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4083 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4084 assert_return(ret
, -EINVAL
);
4086 *ret
= bus
->rqueue_size
;
4090 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4091 assert_return(bus
, -EINVAL
);
4092 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4093 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4094 assert_return(ret
, -EINVAL
);
4096 *ret
= bus
->wqueue_size
;
4100 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4101 assert_return(bus
, -EINVAL
);
4102 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4104 bus
->method_call_timeout
= usec
;
4108 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4112 assert_return(bus
, -EINVAL
);
4113 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4114 assert_return(ret
, -EINVAL
);
4116 if (bus
->method_call_timeout
!= 0) {
4117 *ret
= bus
->method_call_timeout
;
4121 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4122 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4123 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4124 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4125 *ret
= bus
->method_call_timeout
= usec
;
4129 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4133 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4134 assert_return(bus
, -EINVAL
);
4135 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4137 bus
->close_on_exit
= b
;
4141 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4142 assert_return(bus
, -EINVAL
);
4143 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4145 return bus
->close_on_exit
;