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"
31 #include "errno-util.h"
33 #include "hexdecoct.h"
34 #include "hostname-util.h"
36 #include "memory-util.h"
38 #include "parse-util.h"
39 #include "process-util.h"
40 #include "string-util.h"
43 #define log_debug_bus_message(m) \
45 sd_bus_message *_mm = (m); \
46 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", \
47 bus_message_type_to_string(_mm->header->type), \
48 strna(sd_bus_message_get_sender(_mm)), \
49 strna(sd_bus_message_get_destination(_mm)), \
50 strna(sd_bus_message_get_path(_mm)), \
51 strna(sd_bus_message_get_interface(_mm)), \
52 strna(sd_bus_message_get_member(_mm)), \
53 BUS_MESSAGE_COOKIE(_mm), \
55 strna(_mm->root_container.signature), \
56 strna(_mm->error.name), \
57 strna(_mm->error.message)); \
60 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
);
61 static void bus_detach_io_events(sd_bus
*b
);
62 static void bus_detach_inotify_event(sd_bus
*b
);
64 static thread_local sd_bus
*default_system_bus
= NULL
;
65 static thread_local sd_bus
*default_user_bus
= NULL
;
66 static thread_local sd_bus
*default_starter_bus
= NULL
;
68 static sd_bus
**bus_choose_default(int (**bus_open
)(sd_bus
**)) {
71 /* Let's try our best to reuse another cached connection. If
72 * the starter bus type is set, connect via our normal
73 * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
74 * we can share the connection with the user/system default
77 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
79 if (streq(e
, "system")) {
81 *bus_open
= sd_bus_open_system
;
82 return &default_system_bus
;
83 } else if (STR_IN_SET(e
, "user", "session")) {
85 *bus_open
= sd_bus_open_user
;
86 return &default_user_bus
;
90 /* No type is specified, so we have not other option than to
91 * use the starter address if it is set. */
92 e
= secure_getenv("DBUS_STARTER_ADDRESS");
95 *bus_open
= sd_bus_open
;
96 return &default_starter_bus
;
99 /* Finally, if nothing is set use the cached connection for
102 if (cg_pid_get_owner_uid(0, NULL
) >= 0) {
104 *bus_open
= sd_bus_open_user
;
105 return &default_user_bus
;
108 *bus_open
= sd_bus_open_system
;
109 return &default_system_bus
;
113 sd_bus
*bus_resolve(sd_bus
*bus
) {
114 switch ((uintptr_t) bus
) {
115 case (uintptr_t) SD_BUS_DEFAULT
:
116 return *(bus_choose_default(NULL
));
117 case (uintptr_t) SD_BUS_DEFAULT_USER
:
118 return default_user_bus
;
119 case (uintptr_t) SD_BUS_DEFAULT_SYSTEM
:
120 return default_system_bus
;
126 void bus_close_io_fds(sd_bus
*b
) {
129 bus_detach_io_events(b
);
131 if (b
->input_fd
!= b
->output_fd
)
132 safe_close(b
->output_fd
);
133 b
->output_fd
= b
->input_fd
= safe_close(b
->input_fd
);
136 void bus_close_inotify_fd(sd_bus
*b
) {
139 bus_detach_inotify_event(b
);
141 b
->inotify_fd
= safe_close(b
->inotify_fd
);
142 b
->inotify_watches
= mfree(b
->inotify_watches
);
143 b
->n_inotify_watches
= 0;
146 static void bus_reset_queues(sd_bus
*b
) {
149 while (b
->rqueue_size
> 0)
150 bus_message_unref_queued(b
->rqueue
[--b
->rqueue_size
], b
);
152 b
->rqueue
= mfree(b
->rqueue
);
153 b
->rqueue_allocated
= 0;
155 while (b
->wqueue_size
> 0)
156 bus_message_unref_queued(b
->wqueue
[--b
->wqueue_size
], b
);
158 b
->wqueue
= mfree(b
->wqueue
);
159 b
->wqueue_allocated
= 0;
162 static sd_bus
* bus_free(sd_bus
*b
) {
166 assert(!b
->track_queue
);
169 b
->state
= BUS_CLOSED
;
171 sd_bus_detach_event(b
);
173 while ((s
= b
->slots
)) {
174 /* At this point only floating slots can still be
175 * around, because the non-floating ones keep a
176 * reference to the bus, and we thus couldn't be
177 * destructing right now... We forcibly disconnect the
178 * slots here, so that they still can be referenced by
179 * apps, but are dead. */
182 bus_slot_disconnect(s
, true);
185 if (b
->default_bus_ptr
)
186 *b
->default_bus_ptr
= NULL
;
189 bus_close_inotify_fd(b
);
194 free(b
->unique_name
);
195 free(b
->auth_buffer
);
198 free(b
->description
);
199 free(b
->patch_sender
);
202 strv_free(b
->exec_argv
);
204 close_many(b
->fds
, b
->n_fds
);
209 ordered_hashmap_free_free(b
->reply_callbacks
);
210 prioq_free(b
->reply_callbacks_prioq
);
212 assert(b
->match_callbacks
.type
== BUS_MATCH_ROOT
);
213 bus_match_free(&b
->match_callbacks
);
215 hashmap_free_free(b
->vtable_methods
);
216 hashmap_free_free(b
->vtable_properties
);
218 assert(hashmap_isempty(b
->nodes
));
219 hashmap_free(b
->nodes
);
223 assert_se(pthread_mutex_destroy(&b
->memfd_cache_mutex
) == 0);
228 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus
*, bus_free
);
230 _public_
int sd_bus_new(sd_bus
**ret
) {
231 _cleanup_free_ sd_bus
*b
= NULL
;
233 assert_return(ret
, -EINVAL
);
244 .message_version
= 1,
245 .creds_mask
= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
,
247 .original_pid
= getpid_cached(),
248 .n_groups
= (size_t) -1,
249 .close_on_exit
= true,
252 /* We guarantee that wqueue always has space for at least one entry */
253 if (!GREEDY_REALLOC(b
->wqueue
, b
->wqueue_allocated
, 1))
256 assert_se(pthread_mutex_init(&b
->memfd_cache_mutex
, NULL
) == 0);
262 _public_
int sd_bus_set_address(sd_bus
*bus
, const char *address
) {
263 assert_return(bus
, -EINVAL
);
264 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
265 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
266 assert_return(address
, -EINVAL
);
267 assert_return(!bus_pid_changed(bus
), -ECHILD
);
269 return free_and_strdup(&bus
->address
, address
);
272 _public_
int sd_bus_set_fd(sd_bus
*bus
, int input_fd
, int output_fd
) {
273 assert_return(bus
, -EINVAL
);
274 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
275 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
276 assert_return(input_fd
>= 0, -EBADF
);
277 assert_return(output_fd
>= 0, -EBADF
);
278 assert_return(!bus_pid_changed(bus
), -ECHILD
);
280 bus
->input_fd
= input_fd
;
281 bus
->output_fd
= output_fd
;
285 _public_
int sd_bus_set_exec(sd_bus
*bus
, const char *path
, char *const argv
[]) {
286 _cleanup_strv_free_
char **a
= NULL
;
289 assert_return(bus
, -EINVAL
);
290 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
291 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
292 assert_return(path
, -EINVAL
);
293 assert_return(!strv_isempty(argv
), -EINVAL
);
294 assert_return(!bus_pid_changed(bus
), -ECHILD
);
300 r
= free_and_strdup(&bus
->exec_path
, path
);
304 return strv_free_and_replace(bus
->exec_argv
, a
);
307 _public_
int sd_bus_set_bus_client(sd_bus
*bus
, int b
) {
308 assert_return(bus
, -EINVAL
);
309 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
310 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
311 assert_return(!bus
->patch_sender
, -EPERM
);
312 assert_return(!bus_pid_changed(bus
), -ECHILD
);
314 bus
->bus_client
= !!b
;
318 _public_
int sd_bus_set_monitor(sd_bus
*bus
, int b
) {
319 assert_return(bus
, -EINVAL
);
320 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
321 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
322 assert_return(!bus_pid_changed(bus
), -ECHILD
);
324 bus
->is_monitor
= !!b
;
328 _public_
int sd_bus_negotiate_fds(sd_bus
*bus
, int b
) {
329 assert_return(bus
, -EINVAL
);
330 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
331 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
332 assert_return(!bus_pid_changed(bus
), -ECHILD
);
334 bus
->accept_fd
= !!b
;
338 _public_
int sd_bus_negotiate_timestamp(sd_bus
*bus
, int b
) {
339 assert_return(bus
, -EINVAL
);
340 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
341 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
342 assert_return(!bus_pid_changed(bus
), -ECHILD
);
344 /* This is not actually supported by any of our transports these days, but we do honour it for synthetic
345 * replies, and maybe one day classic D-Bus learns this too */
346 bus
->attach_timestamp
= !!b
;
351 _public_
int sd_bus_negotiate_creds(sd_bus
*bus
, int b
, uint64_t mask
) {
352 assert_return(bus
, -EINVAL
);
353 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
354 assert_return(mask
<= _SD_BUS_CREDS_ALL
, -EINVAL
);
355 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
356 assert_return(!bus_pid_changed(bus
), -ECHILD
);
358 SET_FLAG(bus
->creds_mask
, mask
, b
);
360 /* The well knowns we need unconditionally, so that matches can work */
361 bus
->creds_mask
|= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
;
366 _public_
int sd_bus_set_server(sd_bus
*bus
, int b
, sd_id128_t server_id
) {
367 assert_return(bus
, -EINVAL
);
368 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
369 assert_return(b
|| sd_id128_equal(server_id
, SD_ID128_NULL
), -EINVAL
);
370 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
371 assert_return(!bus_pid_changed(bus
), -ECHILD
);
373 bus
->is_server
= !!b
;
374 bus
->server_id
= server_id
;
378 _public_
int sd_bus_set_anonymous(sd_bus
*bus
, int b
) {
379 assert_return(bus
, -EINVAL
);
380 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
381 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
382 assert_return(!bus_pid_changed(bus
), -ECHILD
);
384 bus
->anonymous_auth
= !!b
;
388 _public_
int sd_bus_set_trusted(sd_bus
*bus
, int b
) {
389 assert_return(bus
, -EINVAL
);
390 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
391 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
392 assert_return(!bus_pid_changed(bus
), -ECHILD
);
398 _public_
int sd_bus_set_description(sd_bus
*bus
, const char *description
) {
399 assert_return(bus
, -EINVAL
);
400 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
401 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
402 assert_return(!bus_pid_changed(bus
), -ECHILD
);
404 return free_and_strdup(&bus
->description
, description
);
407 _public_
int sd_bus_set_allow_interactive_authorization(sd_bus
*bus
, int b
) {
408 assert_return(bus
, -EINVAL
);
409 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
410 assert_return(!bus_pid_changed(bus
), -ECHILD
);
412 bus
->allow_interactive_authorization
= !!b
;
416 _public_
int sd_bus_get_allow_interactive_authorization(sd_bus
*bus
) {
417 assert_return(bus
, -EINVAL
);
418 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
419 assert_return(!bus_pid_changed(bus
), -ECHILD
);
421 return bus
->allow_interactive_authorization
;
424 _public_
int sd_bus_set_watch_bind(sd_bus
*bus
, int b
) {
425 assert_return(bus
, -EINVAL
);
426 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
427 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
428 assert_return(!bus_pid_changed(bus
), -ECHILD
);
430 bus
->watch_bind
= !!b
;
434 _public_
int sd_bus_get_watch_bind(sd_bus
*bus
) {
435 assert_return(bus
, -EINVAL
);
436 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
437 assert_return(!bus_pid_changed(bus
), -ECHILD
);
439 return bus
->watch_bind
;
442 _public_
int sd_bus_set_connected_signal(sd_bus
*bus
, int b
) {
443 assert_return(bus
, -EINVAL
);
444 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
445 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
446 assert_return(!bus_pid_changed(bus
), -ECHILD
);
448 bus
->connected_signal
= !!b
;
452 _public_
int sd_bus_get_connected_signal(sd_bus
*bus
) {
453 assert_return(bus
, -EINVAL
);
454 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
455 assert_return(!bus_pid_changed(bus
), -ECHILD
);
457 return bus
->connected_signal
;
460 static int synthesize_connected_signal(sd_bus
*bus
) {
461 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
466 /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called
467 * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the
468 * Hello() reply. Or in other words, whenver we enter BUS_RUNNING state.
470 * This is useful so that clients can start doing stuff whenver the connection is fully established in a way
471 * that works independently from whether we connected to a full bus or just a direct connection. */
473 if (!bus
->connected_signal
)
476 r
= sd_bus_message_new_signal(
479 "/org/freedesktop/DBus/Local",
480 "org.freedesktop.DBus.Local",
485 bus_message_set_sender_local(bus
, m
);
487 r
= bus_seal_synthetic_message(bus
, m
);
491 r
= bus_rqueue_make_room(bus
);
495 /* Insert at the very front */
496 memmove(bus
->rqueue
+ 1, bus
->rqueue
, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
497 bus
->rqueue
[0] = bus_message_ref_queued(m
, bus
);
503 void bus_set_state(sd_bus
*bus
, enum bus_state state
) {
505 static const char * const table
[_BUS_STATE_MAX
] = {
506 [BUS_UNSET
] = "UNSET",
507 [BUS_WATCH_BIND
] = "WATCH_BIND",
508 [BUS_OPENING
] = "OPENING",
509 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
510 [BUS_HELLO
] = "HELLO",
511 [BUS_RUNNING
] = "RUNNING",
512 [BUS_CLOSING
] = "CLOSING",
513 [BUS_CLOSED
] = "CLOSED",
517 assert(state
< _BUS_STATE_MAX
);
519 if (state
== bus
->state
)
522 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
526 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
534 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
536 r
= sd_bus_message_get_errno(reply
);
540 r
= sd_bus_message_read(reply
, "s", &s
);
544 if (!service_name_is_valid(s
) || s
[0] != ':')
547 r
= free_and_strdup(&bus
->unique_name
, s
);
551 if (bus
->state
== BUS_HELLO
) {
552 bus_set_state(bus
, BUS_RUNNING
);
554 r
= synthesize_connected_signal(bus
);
562 static int bus_send_hello(sd_bus
*bus
) {
563 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
568 if (!bus
->bus_client
)
571 r
= sd_bus_message_new_method_call(
574 "org.freedesktop.DBus",
575 "/org/freedesktop/DBus",
576 "org.freedesktop.DBus",
581 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
584 int bus_start_running(sd_bus
*bus
) {
585 struct reply_callback
*c
;
591 assert(bus
->state
< BUS_HELLO
);
593 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
594 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
595 * adding a fixed value to all entries should not alter the internal order. */
597 n
= now(CLOCK_MONOTONIC
);
598 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
599 if (c
->timeout_usec
== 0)
602 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
605 if (bus
->bus_client
) {
606 bus_set_state(bus
, BUS_HELLO
);
610 bus_set_state(bus
, BUS_RUNNING
);
612 r
= synthesize_connected_signal(bus
);
619 static int parse_address_key(const char **p
, const char *key
, char **value
) {
620 size_t l
, n
= 0, allocated
= 0;
621 _cleanup_free_
char *r
= NULL
;
630 if (strncmp(*p
, key
, l
) != 0)
643 while (!IN_SET(*a
, ';', ',', 0)) {
657 c
= (char) ((x
<< 4) | y
);
664 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
682 free_and_replace(*value
, r
);
687 static void skip_address_key(const char **p
) {
691 *p
+= strcspn(*p
, ",");
697 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
698 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
707 while (!IN_SET(**p
, 0, ';')) {
708 r
= parse_address_key(p
, "guid", guid
);
714 r
= parse_address_key(p
, "path", &path
);
720 r
= parse_address_key(p
, "abstract", &abstract
);
729 if (!path
&& !abstract
)
732 if (path
&& abstract
)
737 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
740 b
->sockaddr
.un
= (struct sockaddr_un
) {
741 .sun_family
= AF_UNIX
,
744 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
745 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
750 l
= strlen(abstract
);
751 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
754 b
->sockaddr
.un
= (struct sockaddr_un
) {
755 .sun_family
= AF_UNIX
,
758 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
759 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
767 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
768 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
770 struct addrinfo
*result
, hints
= {
771 .ai_socktype
= SOCK_STREAM
,
772 .ai_flags
= AI_ADDRCONFIG
,
780 while (!IN_SET(**p
, 0, ';')) {
781 r
= parse_address_key(p
, "guid", guid
);
787 r
= parse_address_key(p
, "host", &host
);
793 r
= parse_address_key(p
, "port", &port
);
799 r
= parse_address_key(p
, "family", &family
);
812 if (streq(family
, "ipv4"))
813 hints
.ai_family
= AF_INET
;
814 else if (streq(family
, "ipv6"))
815 hints
.ai_family
= AF_INET6
;
820 r
= getaddrinfo(host
, port
, &hints
, &result
);
824 return -EADDRNOTAVAIL
;
826 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
827 b
->sockaddr_size
= result
->ai_addrlen
;
829 freeaddrinfo(result
);
836 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
838 unsigned n_argv
= 0, j
;
840 size_t allocated
= 0;
848 while (!IN_SET(**p
, 0, ';')) {
849 r
= parse_address_key(p
, "guid", guid
);
855 r
= parse_address_key(p
, "path", &path
);
861 if (startswith(*p
, "argv")) {
865 ul
= strtoul(*p
+ 4, (char**) p
, 10);
866 if (errno
> 0 || **p
!= '=' || ul
> 256) {
874 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
882 r
= parse_address_key(p
, NULL
, argv
+ ul
);
897 /* Make sure there are no holes in the array, with the
898 * exception of argv[0] */
899 for (j
= 1; j
< n_argv
; j
++)
905 if (argv
&& argv
[0] == NULL
) {
906 argv
[0] = strdup(path
);
921 for (j
= 0; j
< n_argv
; j
++)
929 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
930 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
938 while (!IN_SET(**p
, 0, ';')) {
939 r
= parse_address_key(p
, "guid", guid
);
945 r
= parse_address_key(p
, "machine", &machine
);
951 r
= parse_address_key(p
, "pid", &pid
);
960 if (!machine
== !pid
)
964 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
967 free_and_replace(b
->machine
, machine
);
969 b
->machine
= mfree(b
->machine
);
973 r
= parse_pid(pid
, &b
->nspid
);
979 b
->sockaddr
.un
= (struct sockaddr_un
) {
980 .sun_family
= AF_UNIX
,
981 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
982 .sun_path
= "/var/run/dbus/system_bus_socket",
984 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
990 static void bus_reset_parsed_address(sd_bus
*b
) {
994 b
->sockaddr_size
= 0;
995 b
->exec_argv
= strv_free(b
->exec_argv
);
996 b
->exec_path
= mfree(b
->exec_path
);
997 b
->server_id
= SD_ID128_NULL
;
998 b
->machine
= mfree(b
->machine
);
1002 static int bus_parse_next_address(sd_bus
*b
) {
1003 _cleanup_free_
char *guid
= NULL
;
1011 if (b
->address
[b
->address_index
] == 0)
1014 bus_reset_parsed_address(b
);
1016 a
= b
->address
+ b
->address_index
;
1025 if (startswith(a
, "unix:")) {
1028 r
= parse_unix_address(b
, &a
, &guid
);
1033 } else if (startswith(a
, "tcp:")) {
1036 r
= parse_tcp_address(b
, &a
, &guid
);
1042 } else if (startswith(a
, "unixexec:")) {
1045 r
= parse_exec_address(b
, &a
, &guid
);
1051 } else if (startswith(a
, "x-machine-unix:")) {
1054 r
= parse_container_unix_address(b
, &a
, &guid
);
1067 r
= sd_id128_from_string(guid
, &b
->server_id
);
1072 b
->address_index
= a
- b
->address
;
1076 static void bus_kill_exec(sd_bus
*bus
) {
1077 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1078 sigterm_wait(bus
->busexec_pid
);
1079 bus
->busexec_pid
= 0;
1083 static int bus_start_address(sd_bus
*b
) {
1089 bus_close_io_fds(b
);
1090 bus_close_inotify_fd(b
);
1094 /* If you provide multiple different bus-addresses, we
1095 * try all of them in order and use the first one that
1099 r
= bus_socket_exec(b
);
1100 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1101 r
= bus_container_connect_socket(b
);
1102 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1103 r
= bus_socket_connect(b
);
1110 q
= bus_attach_io_events(b
);
1114 q
= bus_attach_inotify_event(b
);
1121 b
->last_connect_error
= -r
;
1124 r
= bus_parse_next_address(b
);
1128 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1132 int bus_next_address(sd_bus
*b
) {
1135 bus_reset_parsed_address(b
);
1136 return bus_start_address(b
);
1139 static int bus_start_fd(sd_bus
*b
) {
1144 assert(b
->input_fd
>= 0);
1145 assert(b
->output_fd
>= 0);
1147 r
= fd_nonblock(b
->input_fd
, true);
1151 r
= fd_cloexec(b
->input_fd
, true);
1155 if (b
->input_fd
!= b
->output_fd
) {
1156 r
= fd_nonblock(b
->output_fd
, true);
1160 r
= fd_cloexec(b
->output_fd
, true);
1165 if (fstat(b
->input_fd
, &st
) < 0)
1168 return bus_socket_take_fd(b
);
1171 _public_
int sd_bus_start(sd_bus
*bus
) {
1174 assert_return(bus
, -EINVAL
);
1175 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1176 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1177 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1179 bus_set_state(bus
, BUS_OPENING
);
1181 if (bus
->is_server
&& bus
->bus_client
)
1184 if (bus
->input_fd
>= 0)
1185 r
= bus_start_fd(bus
);
1186 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1187 r
= bus_start_address(bus
);
1196 return bus_send_hello(bus
);
1199 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1201 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1204 assert_return(ret
, -EINVAL
);
1206 /* Let's connect to the starter bus if it is set, and
1207 * otherwise to the bus that is appropropriate for the scope
1208 * we are running in */
1210 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1212 if (streq(e
, "system"))
1213 return sd_bus_open_system_with_description(ret
, description
);
1214 else if (STR_IN_SET(e
, "session", "user"))
1215 return sd_bus_open_user_with_description(ret
, description
);
1218 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1220 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1221 return sd_bus_open_user_with_description(ret
, description
);
1223 return sd_bus_open_system_with_description(ret
, description
);
1230 r
= sd_bus_set_address(b
, e
);
1234 b
->bus_client
= true;
1236 /* We don't know whether the bus is trusted or not, so better
1237 * be safe, and authenticate everything */
1239 b
->is_local
= false;
1240 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1242 r
= sd_bus_start(b
);
1250 _public_
int sd_bus_open(sd_bus
**ret
) {
1251 return sd_bus_open_with_description(ret
, NULL
);
1254 int bus_set_address_system(sd_bus
*b
) {
1258 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1260 return sd_bus_set_address(b
, e
);
1262 return sd_bus_set_address(b
, DEFAULT_SYSTEM_BUS_ADDRESS
);
1265 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1266 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1269 assert_return(ret
, -EINVAL
);
1276 r
= sd_bus_set_description(b
, description
);
1281 r
= bus_set_address_system(b
);
1285 b
->bus_client
= true;
1286 b
->is_system
= true;
1288 /* Let's do per-method access control on the system bus. We
1289 * need the caller's UID and capability set for that. */
1291 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1294 r
= sd_bus_start(b
);
1302 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1303 return sd_bus_open_system_with_description(ret
, NULL
);
1306 int bus_set_address_user(sd_bus
*b
) {
1308 _cleanup_free_
char *ee
= NULL
, *s
= NULL
;
1312 e
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1314 return sd_bus_set_address(b
, e
);
1316 e
= secure_getenv("XDG_RUNTIME_DIR");
1320 ee
= bus_address_escape(e
);
1324 if (asprintf(&s
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1327 b
->address
= TAKE_PTR(s
);
1332 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1333 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1336 assert_return(ret
, -EINVAL
);
1343 r
= sd_bus_set_description(b
, description
);
1348 r
= bus_set_address_user(b
);
1352 b
->bus_client
= true;
1355 /* We don't do any per-method access control on the user
1360 r
= sd_bus_start(b
);
1368 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1369 return sd_bus_open_user_with_description(ret
, NULL
);
1372 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1373 _cleanup_free_
char *e
= NULL
;
1374 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1379 /* Skip ":"s in ipv6 addresses */
1383 rbracket
= strchr(host
, ']');
1386 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1387 e
= bus_address_escape(t
);
1390 } else if ((a
= strchr(host
, '@'))) {
1391 if (*(a
+ 1) == '[') {
1392 _cleanup_free_
char *t
= NULL
;
1394 rbracket
= strchr(a
+ 1, ']');
1397 t
= new0(char, strlen(host
));
1400 strncat(t
, host
, a
- host
+ 1);
1401 strncat(t
, a
+ 2, rbracket
- a
- 2);
1402 e
= bus_address_escape(t
);
1405 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1409 /* Let's see if a port was given */
1410 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1413 bool got_forward_slash
= false;
1419 p
= strndupa(p
, t
- p
);
1420 got_forward_slash
= true;
1423 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1424 if (!machine_name_is_valid(p
) || got_forward_slash
)
1428 goto interpret_port_as_machine_old_syntax
;
1432 /* Let's see if a machine was given */
1433 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1436 interpret_port_as_machine_old_syntax
:
1437 /* Let's make sure this is not a port of some kind,
1438 * and is a valid machine name. */
1439 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1440 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1446 t
= strndupa(host
, strcspn(host
, ":/"));
1448 e
= bus_address_escape(t
);
1453 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1454 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1455 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1459 return free_and_replace(b
->address
, a
);
1462 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1463 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1466 assert_return(host
, -EINVAL
);
1467 assert_return(ret
, -EINVAL
);
1473 r
= bus_set_address_system_remote(b
, host
);
1477 b
->bus_client
= true;
1479 b
->is_system
= true;
1480 b
->is_local
= false;
1482 r
= sd_bus_start(b
);
1490 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1491 _cleanup_free_
char *e
= NULL
;
1497 e
= bus_address_escape(machine
);
1501 a
= strjoin("x-machine-unix:machine=", e
);
1505 return free_and_replace(b
->address
, a
);
1508 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1509 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1512 assert_return(machine
, -EINVAL
);
1513 assert_return(ret
, -EINVAL
);
1514 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1520 r
= bus_set_address_system_machine(b
, machine
);
1524 b
->bus_client
= true;
1526 b
->is_system
= true;
1527 b
->is_local
= false;
1529 r
= sd_bus_start(b
);
1537 _public_
void sd_bus_close(sd_bus
*bus
) {
1540 if (bus
->state
== BUS_CLOSED
)
1542 if (bus_pid_changed(bus
))
1545 /* Don't leave ssh hanging around */
1548 bus_set_state(bus
, BUS_CLOSED
);
1550 sd_bus_detach_event(bus
);
1552 /* Drop all queued messages so that they drop references to
1553 * the bus object and the bus may be freed */
1554 bus_reset_queues(bus
);
1556 bus_close_io_fds(bus
);
1557 bus_close_inotify_fd(bus
);
1560 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1566 return sd_bus_unref(bus
);
1569 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1573 /* Have to do this before flush() to prevent hang */
1577 return sd_bus_close_unref(bus
);
1580 void bus_enter_closing(sd_bus
*bus
) {
1583 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1586 bus_set_state(bus
, BUS_CLOSING
);
1589 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1591 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1592 assert_return(bus
, -EINVAL
);
1593 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1594 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1596 return BUS_IS_OPEN(bus
->state
);
1599 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1600 assert_return(bus
, -EINVAL
);
1601 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1602 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1604 return bus
->state
== BUS_RUNNING
;
1607 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1610 assert_return(bus
, -EINVAL
);
1611 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1612 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1613 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1615 if (bus
->is_monitor
)
1618 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1619 if (!bus
->accept_fd
)
1622 r
= bus_ensure_running(bus
);
1626 return bus
->can_fds
;
1629 return bus_type_is_valid(type
);
1632 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1635 assert_return(bus
, -EINVAL
);
1636 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1637 assert_return(id
, -EINVAL
);
1638 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1640 r
= bus_ensure_running(bus
);
1644 *id
= bus
->server_id
;
1648 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1650 static uint64_t cookie_inc(uint64_t cookie
) {
1652 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1653 if (cookie
>= UINT32_MAX
)
1654 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1655 * whether we are looping. */
1660 static int next_cookie(sd_bus
*b
) {
1661 uint64_t new_cookie
;
1665 new_cookie
= cookie_inc(b
->cookie
);
1667 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1668 * least once, but then do it thorougly. */
1669 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1672 /* Check if the cookie is currently in use. If so, pick the next one */
1673 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1674 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1677 new_cookie
= cookie_inc(new_cookie
);
1680 /* Can't fulfill request */
1685 b
->cookie
= new_cookie
;
1689 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1696 /* If we copy the same message to multiple
1697 * destinations, avoid using the same cookie
1699 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1704 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1709 if (!m
->sender
&& b
->patch_sender
) {
1710 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1719 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1722 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1723 bool remarshal
= false;
1727 /* wrong packet version */
1728 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1731 /* wrong packet endianness */
1732 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1735 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1738 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1742 /* Fake some timestamps, if they were requested, and not
1743 * already initialized */
1744 if (b
->attach_timestamp
) {
1745 if (m
->realtime
<= 0)
1746 m
->realtime
= now(CLOCK_REALTIME
);
1748 if (m
->monotonic
<= 0)
1749 m
->monotonic
= now(CLOCK_MONOTONIC
);
1752 /* The bus specification says the serial number cannot be 0,
1753 * hence let's fill something in for synthetic messages. Since
1754 * synthetic messages might have a fake sender and we don't
1755 * want to interfere with the real sender's serial numbers we
1756 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1757 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1758 * even though kdbus can do 64bit. */
1759 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1762 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1768 r
= bus_socket_write_message(bus
, m
, idx
);
1772 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1773 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",
1774 bus_message_type_to_string(m
->header
->type
),
1775 strna(sd_bus_message_get_sender(m
)),
1776 strna(sd_bus_message_get_destination(m
)),
1777 strna(sd_bus_message_get_path(m
)),
1778 strna(sd_bus_message_get_interface(m
)),
1779 strna(sd_bus_message_get_member(m
)),
1780 BUS_MESSAGE_COOKIE(m
),
1782 strna(m
->root_container
.signature
),
1783 strna(m
->error
.name
),
1784 strna(m
->error
.message
));
1789 static int dispatch_wqueue(sd_bus
*bus
) {
1793 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1795 while (bus
->wqueue_size
> 0) {
1797 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1801 /* Didn't do anything this time */
1803 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1804 /* Fully written. Let's drop the entry from
1807 * This isn't particularly optimized, but
1808 * well, this is supposed to be our worst-case
1809 * buffer only, and the socket buffer is
1810 * supposed to be our primary buffer, and if
1811 * it got full, then all bets are off
1815 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1816 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1826 static int bus_read_message(sd_bus
*bus
, bool hint_priority
, int64_t priority
) {
1829 return bus_socket_read_message(bus
);
1832 int bus_rqueue_make_room(sd_bus
*bus
) {
1835 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1838 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1844 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1846 assert(i
< bus
->rqueue_size
);
1848 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1849 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1853 static int dispatch_rqueue(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**m
) {
1858 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1860 /* Note that the priority logic is only available on kdbus,
1861 * where the rqueue is unused. We check the rqueue here
1862 * anyway, because it's simple... */
1865 if (bus
->rqueue_size
> 0) {
1866 /* Dispatch a queued message */
1867 *m
= sd_bus_message_ref(bus
->rqueue
[0]);
1868 rqueue_drop_one(bus
, 0);
1872 /* Try to read a new message */
1873 r
= bus_read_message(bus
, hint_priority
, priority
);
1885 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1886 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1889 assert_return(m
, -EINVAL
);
1894 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1896 if (!BUS_IS_OPEN(bus
->state
))
1900 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1907 /* If the cookie number isn't kept, then we know that no reply
1909 if (!cookie
&& !m
->sealed
)
1910 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1912 r
= bus_seal_message(bus
, m
, 0);
1916 /* Remarshall if we have to. This will possibly unref the
1917 * message and place a replacement in m */
1918 r
= bus_remarshal_message(bus
, &m
);
1922 /* If this is a reply and no reply was requested, then let's
1923 * suppress this, if we can */
1927 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1930 r
= bus_write_message(bus
, m
, &idx
);
1932 if (ERRNO_IS_DISCONNECT(r
)) {
1933 bus_enter_closing(bus
);
1940 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1941 /* Wasn't fully written. So let's remember how
1942 * much was written. Note that the first entry
1943 * of the wqueue array is always allocated so
1944 * that we always can remember how much was
1946 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1947 bus
->wqueue_size
= 1;
1952 /* Just append it to the queue. */
1954 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1957 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1960 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1965 *cookie
= BUS_MESSAGE_COOKIE(m
);
1970 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1973 assert_return(m
, -EINVAL
);
1978 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1980 if (!BUS_IS_OPEN(bus
->state
))
1983 if (!streq_ptr(m
->destination
, destination
)) {
1988 r
= sd_bus_message_set_destination(m
, destination
);
1993 return sd_bus_send(bus
, m
, cookie
);
1996 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
1999 if (usec
== (uint64_t) -1)
2002 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2003 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2004 * relative timestamp, and afterwards the absolute one. */
2006 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2009 return now(CLOCK_MONOTONIC
) + usec
;
2012 static int timeout_compare(const void *a
, const void *b
) {
2013 const struct reply_callback
*x
= a
, *y
= b
;
2015 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2018 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2021 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2024 _public_
int sd_bus_call_async(
2028 sd_bus_message_handler_t callback
,
2032 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2033 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2036 assert_return(m
, -EINVAL
);
2037 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2038 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2043 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2045 if (!BUS_IS_OPEN(bus
->state
))
2048 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2049 if (!callback
&& !slot
&& !m
->sealed
)
2050 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2052 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2056 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2060 r
= bus_seal_message(bus
, m
, usec
);
2064 r
= bus_remarshal_message(bus
, &m
);
2068 if (slot
|| callback
) {
2069 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2073 s
->reply_callback
.callback
= callback
;
2075 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2076 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2078 s
->reply_callback
.cookie
= 0;
2082 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2083 if (s
->reply_callback
.timeout_usec
!= 0) {
2084 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2086 s
->reply_callback
.timeout_usec
= 0;
2092 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2103 int bus_ensure_running(sd_bus
*bus
) {
2108 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2110 if (bus
->state
== BUS_RUNNING
)
2114 r
= sd_bus_process(bus
, NULL
);
2117 if (bus
->state
== BUS_RUNNING
)
2122 r
= sd_bus_wait(bus
, (uint64_t) -1);
2128 _public_
int sd_bus_call(
2132 sd_bus_error
*error
,
2133 sd_bus_message
**reply
) {
2135 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2141 bus_assert_return(m
, -EINVAL
, error
);
2142 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2143 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2144 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2149 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2151 if (!BUS_IS_OPEN(bus
->state
)) {
2156 r
= bus_ensure_running(bus
);
2160 i
= bus
->rqueue_size
;
2162 r
= bus_seal_message(bus
, m
, usec
);
2166 r
= bus_remarshal_message(bus
, &m
);
2170 r
= sd_bus_send(bus
, m
, &cookie
);
2174 timeout
= calc_elapse(bus
, m
->timeout
);
2179 while (i
< bus
->rqueue_size
) {
2180 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2182 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2184 if (incoming
->reply_cookie
== cookie
) {
2185 /* Found a match! */
2187 rqueue_drop_one(bus
, i
);
2188 log_debug_bus_message(incoming
);
2190 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2192 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2194 *reply
= TAKE_PTR(incoming
);
2199 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2201 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2202 return sd_bus_error_copy(error
, &incoming
->error
);
2208 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2211 streq(bus
->unique_name
, incoming
->sender
)) {
2213 rqueue_drop_one(bus
, i
);
2215 /* Our own message? Somebody is trying to send its own client a message,
2216 * let's not dead-lock, let's fail immediately. */
2222 /* Try to read more, right-away */
2226 r
= bus_read_message(bus
, false, 0);
2228 if (ERRNO_IS_DISCONNECT(r
)) {
2229 bus_enter_closing(bus
);
2241 n
= now(CLOCK_MONOTONIC
);
2249 left
= (uint64_t) -1;
2251 r
= bus_poll(bus
, true, left
);
2259 r
= dispatch_wqueue(bus
);
2261 if (ERRNO_IS_DISCONNECT(r
)) {
2262 bus_enter_closing(bus
);
2271 return sd_bus_error_set_errno(error
, r
);
2274 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2276 assert_return(bus
, -EINVAL
);
2277 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2278 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2279 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2281 if (bus
->state
== BUS_CLOSED
)
2284 if (bus
->inotify_fd
>= 0)
2285 return bus
->inotify_fd
;
2287 if (bus
->input_fd
>= 0)
2288 return bus
->input_fd
;
2293 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2296 assert_return(bus
, -EINVAL
);
2297 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2298 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2300 switch (bus
->state
) {
2306 case BUS_WATCH_BIND
:
2314 case BUS_AUTHENTICATING
:
2315 if (bus_socket_auth_needs_write(bus
))
2323 if (bus
->rqueue_size
<= 0)
2325 if (bus
->wqueue_size
> 0)
2333 assert_not_reached("Unknown state");
2339 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2340 struct reply_callback
*c
;
2342 assert_return(bus
, -EINVAL
);
2343 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2344 assert_return(timeout_usec
, -EINVAL
);
2345 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2347 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2350 if (bus
->track_queue
) {
2355 switch (bus
->state
) {
2357 case BUS_AUTHENTICATING
:
2358 *timeout_usec
= bus
->auth_timeout
;
2363 if (bus
->rqueue_size
> 0) {
2368 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2370 *timeout_usec
= (uint64_t) -1;
2374 if (c
->timeout_usec
== 0) {
2375 *timeout_usec
= (uint64_t) -1;
2379 *timeout_usec
= c
->timeout_usec
;
2386 case BUS_WATCH_BIND
:
2388 *timeout_usec
= (uint64_t) -1;
2392 assert_not_reached("Unknown or unexpected stat");
2396 static int process_timeout(sd_bus
*bus
) {
2397 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2398 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2399 struct reply_callback
*c
;
2406 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2408 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2412 n
= now(CLOCK_MONOTONIC
);
2413 if (c
->timeout_usec
> n
)
2416 r
= bus_message_new_synthetic_error(
2419 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2424 r
= bus_seal_synthetic_message(bus
, m
);
2428 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2429 c
->timeout_usec
= 0;
2431 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2434 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2436 bus
->iteration_counter
++;
2438 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2440 bus
->current_message
= m
;
2441 bus
->current_slot
= sd_bus_slot_ref(slot
);
2442 bus
->current_handler
= c
->callback
;
2443 bus
->current_userdata
= slot
->userdata
;
2444 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2445 bus
->current_userdata
= NULL
;
2446 bus
->current_handler
= NULL
;
2447 bus
->current_slot
= NULL
;
2448 bus
->current_message
= NULL
;
2451 bus_slot_disconnect(slot
, true);
2453 sd_bus_slot_unref(slot
);
2455 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2456 * and ignore the callback handler's return value. */
2460 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2463 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2467 if (bus
->state
!= BUS_HELLO
)
2470 /* Let's make sure the first message on the bus is the HELLO
2471 * reply. But note that we don't actually parse the message
2472 * here (we leave that to the usual handling), we just verify
2473 * we don't let any earlier msg through. */
2475 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2478 if (m
->reply_cookie
!= 1)
2484 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2485 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2486 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2487 struct reply_callback
*c
;
2495 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2498 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2501 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2507 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2509 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2511 /* If the reply contained a file descriptor which we
2512 * didn't want we pass an error instead. */
2514 r
= bus_message_new_synthetic_error(
2517 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2522 /* Copy over original timestamp */
2523 synthetic_reply
->realtime
= m
->realtime
;
2524 synthetic_reply
->monotonic
= m
->monotonic
;
2525 synthetic_reply
->seqnum
= m
->seqnum
;
2527 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2531 m
= synthetic_reply
;
2533 r
= sd_bus_message_rewind(m
, true);
2538 if (c
->timeout_usec
!= 0) {
2539 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2540 c
->timeout_usec
= 0;
2543 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2545 bus
->current_slot
= sd_bus_slot_ref(slot
);
2546 bus
->current_handler
= c
->callback
;
2547 bus
->current_userdata
= slot
->userdata
;
2548 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2549 bus
->current_userdata
= NULL
;
2550 bus
->current_handler
= NULL
;
2551 bus
->current_slot
= NULL
;
2554 bus_slot_disconnect(slot
, true);
2556 sd_bus_slot_unref(slot
);
2558 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2559 * ignore the callback handler's return value. */
2563 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2566 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2567 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2568 struct filter_callback
*l
;
2575 bus
->filter_callbacks_modified
= false;
2577 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2580 if (bus
->filter_callbacks_modified
)
2583 /* Don't run this more than once per iteration */
2584 if (l
->last_iteration
== bus
->iteration_counter
)
2587 l
->last_iteration
= bus
->iteration_counter
;
2589 r
= sd_bus_message_rewind(m
, true);
2593 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2595 bus
->current_slot
= sd_bus_slot_ref(slot
);
2596 bus
->current_handler
= l
->callback
;
2597 bus
->current_userdata
= slot
->userdata
;
2598 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2599 bus
->current_userdata
= NULL
;
2600 bus
->current_handler
= NULL
;
2601 bus
->current_slot
= sd_bus_slot_unref(slot
);
2603 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2609 } while (bus
->filter_callbacks_modified
);
2614 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2621 bus
->match_callbacks_modified
= false;
2623 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2627 } while (bus
->match_callbacks_modified
);
2632 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2633 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2639 if (bus
->is_monitor
)
2642 if (bus
->manual_peer_interface
)
2645 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2648 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2651 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2654 if (streq_ptr(m
->member
, "Ping"))
2655 r
= sd_bus_message_new_method_return(m
, &reply
);
2656 else if (streq_ptr(m
->member
, "GetMachineId")) {
2660 r
= sd_id128_get_machine(&id
);
2664 r
= sd_bus_message_new_method_return(m
, &reply
);
2668 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2670 r
= sd_bus_message_new_method_errorf(
2672 SD_BUS_ERROR_UNKNOWN_METHOD
,
2673 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2678 r
= sd_bus_send(bus
, reply
, NULL
);
2685 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2689 /* If we got a message with a file descriptor which we didn't
2690 * want to accept, then let's drop it. How can this even
2691 * happen? For example, when the kernel queues a message into
2692 * an activatable names's queue which allows fds, and then is
2693 * delivered to us later even though we ourselves did not
2696 if (bus
->is_monitor
)
2705 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2706 return 1; /* just eat it up */
2708 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2711 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2717 bus
->current_message
= m
;
2718 bus
->iteration_counter
++;
2720 log_debug_bus_message(m
);
2722 r
= process_hello(bus
, m
);
2726 r
= process_reply(bus
, m
);
2730 r
= process_fd_check(bus
, m
);
2734 r
= process_filter(bus
, m
);
2738 r
= process_match(bus
, m
);
2742 r
= process_builtin(bus
, m
);
2746 r
= bus_process_object(bus
, m
);
2749 bus
->current_message
= NULL
;
2753 static int dispatch_track(sd_bus
*bus
) {
2756 if (!bus
->track_queue
)
2759 bus_track_dispatch(bus
->track_queue
);
2763 static int process_running(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2764 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2768 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2770 r
= process_timeout(bus
);
2774 r
= dispatch_wqueue(bus
);
2778 r
= dispatch_track(bus
);
2782 r
= dispatch_rqueue(bus
, hint_priority
, priority
, &m
);
2788 r
= process_message(bus
, m
);
2793 r
= sd_bus_message_rewind(m
, true);
2801 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2803 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2804 strna(sd_bus_message_get_sender(m
)),
2805 strna(sd_bus_message_get_path(m
)),
2806 strna(sd_bus_message_get_interface(m
)),
2807 strna(sd_bus_message_get_member(m
)));
2809 r
= sd_bus_reply_method_errorf(
2811 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2812 "Unknown object '%s'.", m
->path
);
2826 static int bus_exit_now(sd_bus
*bus
) {
2829 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2830 * sd_event_exit(), otherwise invokes libc exit(). */
2832 if (bus
->exited
) /* did we already exit? */
2834 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2836 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2839 bus
->exited
= true; /* never exit more than once */
2841 log_debug("Bus connection disconnected, exiting.");
2844 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2848 assert_not_reached("exit() didn't exit?");
2851 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2852 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2853 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2860 r
= bus_message_new_synthetic_error(
2863 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2868 r
= bus_seal_synthetic_message(bus
, m
);
2872 if (c
->timeout_usec
!= 0) {
2873 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2874 c
->timeout_usec
= 0;
2877 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2880 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2882 bus
->iteration_counter
++;
2884 bus
->current_message
= m
;
2885 bus
->current_slot
= sd_bus_slot_ref(slot
);
2886 bus
->current_handler
= c
->callback
;
2887 bus
->current_userdata
= slot
->userdata
;
2888 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2889 bus
->current_userdata
= NULL
;
2890 bus
->current_handler
= NULL
;
2891 bus
->current_slot
= NULL
;
2892 bus
->current_message
= NULL
;
2895 bus_slot_disconnect(slot
, true);
2897 sd_bus_slot_unref(slot
);
2899 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2902 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2903 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2904 struct reply_callback
*c
;
2908 assert(bus
->state
== BUS_CLOSING
);
2910 /* First, fail all outstanding method calls */
2911 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2913 return process_closing_reply_callback(bus
, c
);
2915 /* Then, fake-drop all remaining bus tracking references */
2917 bus_track_close(bus
->tracks
);
2921 /* Then, synthesize a Disconnected message */
2922 r
= sd_bus_message_new_signal(
2925 "/org/freedesktop/DBus/Local",
2926 "org.freedesktop.DBus.Local",
2931 bus_message_set_sender_local(bus
, m
);
2933 r
= bus_seal_synthetic_message(bus
, m
);
2939 bus
->current_message
= m
;
2940 bus
->iteration_counter
++;
2942 r
= process_filter(bus
, m
);
2946 r
= process_match(bus
, m
);
2950 /* Nothing else to do, exit now, if the condition holds */
2951 bus
->exit_triggered
= true;
2952 (void) bus_exit_now(bus
);
2960 bus
->current_message
= NULL
;
2965 static int bus_process_internal(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2968 /* Returns 0 when we didn't do anything. This should cause the
2969 * caller to invoke sd_bus_wait() before returning the next
2970 * time. Returns > 0 when we did something, which possibly
2971 * means *ret is filled in with an unprocessed message. */
2973 assert_return(bus
, -EINVAL
);
2974 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2975 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2977 /* We don't allow recursively invoking sd_bus_process(). */
2978 assert_return(!bus
->current_message
, -EBUSY
);
2979 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
2981 BUS_DONT_DESTROY(bus
);
2983 switch (bus
->state
) {
2991 case BUS_WATCH_BIND
:
2992 r
= bus_socket_process_watch_bind(bus
);
2996 r
= bus_socket_process_opening(bus
);
2999 case BUS_AUTHENTICATING
:
3000 r
= bus_socket_process_authenticating(bus
);
3005 r
= process_running(bus
, hint_priority
, priority
, ret
);
3009 /* This branch initializes *ret, hence we don't use the generic error checking below */
3013 return process_closing(bus
, ret
);
3016 assert_not_reached("Unknown state");
3019 if (ERRNO_IS_DISCONNECT(r
)) {
3020 bus_enter_closing(bus
);
3031 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3032 return bus_process_internal(bus
, false, 0, ret
);
3035 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3036 return bus_process_internal(bus
, true, priority
, ret
);
3039 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3040 struct pollfd p
[2] = {};
3043 usec_t m
= USEC_INFINITY
;
3047 if (bus
->state
== BUS_CLOSING
)
3050 if (!BUS_IS_OPEN(bus
->state
))
3053 if (bus
->state
== BUS_WATCH_BIND
) {
3054 assert(bus
->inotify_fd
>= 0);
3056 p
[0].events
= POLLIN
;
3057 p
[0].fd
= bus
->inotify_fd
;
3062 e
= sd_bus_get_events(bus
);
3067 /* The caller really needs some more data, he doesn't
3068 * care about what's already read, or any timeouts
3069 * except its own. */
3073 /* The caller wants to process if there's something to
3074 * process, but doesn't care otherwise */
3076 r
= sd_bus_get_timeout(bus
, &until
);
3080 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3083 p
[0].fd
= bus
->input_fd
;
3084 if (bus
->output_fd
== bus
->input_fd
) {
3088 p
[0].events
= e
& POLLIN
;
3089 p
[1].fd
= bus
->output_fd
;
3090 p
[1].events
= e
& POLLOUT
;
3095 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3098 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3102 return r
> 0 ? 1 : 0;
3105 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3107 assert_return(bus
, -EINVAL
);
3108 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3109 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3111 if (bus
->state
== BUS_CLOSING
)
3114 if (!BUS_IS_OPEN(bus
->state
))
3117 if (bus
->rqueue_size
> 0)
3120 return bus_poll(bus
, false, timeout_usec
);
3123 _public_
int sd_bus_flush(sd_bus
*bus
) {
3126 assert_return(bus
, -EINVAL
);
3127 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3128 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3130 if (bus
->state
== BUS_CLOSING
)
3133 if (!BUS_IS_OPEN(bus
->state
))
3136 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3137 if (bus
->state
== BUS_WATCH_BIND
)
3140 r
= bus_ensure_running(bus
);
3144 if (bus
->wqueue_size
<= 0)
3148 r
= dispatch_wqueue(bus
);
3150 if (ERRNO_IS_DISCONNECT(r
)) {
3151 bus_enter_closing(bus
);
3158 if (bus
->wqueue_size
<= 0)
3161 r
= bus_poll(bus
, false, (uint64_t) -1);
3167 _public_
int sd_bus_add_filter(
3170 sd_bus_message_handler_t callback
,
3175 assert_return(bus
, -EINVAL
);
3176 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3177 assert_return(callback
, -EINVAL
);
3178 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3180 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3184 s
->filter_callback
.callback
= callback
;
3186 bus
->filter_callbacks_modified
= true;
3187 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3195 static int add_match_callback(
3198 sd_bus_error
*ret_error
) {
3200 sd_bus_slot
*match_slot
= userdata
;
3201 bool failed
= false;
3207 sd_bus_slot_ref(match_slot
);
3209 if (sd_bus_message_is_method_error(m
, NULL
)) {
3210 log_debug_errno(sd_bus_message_get_errno(m
),
3211 "Unable to add match %s, failing connection: %s",
3212 match_slot
->match_callback
.match_string
,
3213 sd_bus_message_get_error(m
)->message
);
3217 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3219 if (match_slot
->match_callback
.install_callback
) {
3222 bus
= sd_bus_message_get_bus(m
);
3224 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3225 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3228 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3229 assert(bus
->current_handler
== add_match_callback
);
3230 assert(bus
->current_userdata
== userdata
);
3232 bus
->current_slot
= match_slot
;
3233 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3234 bus
->current_userdata
= match_slot
->userdata
;
3236 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3238 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3239 bus
->current_handler
= add_match_callback
;
3240 bus
->current_userdata
= userdata
;
3242 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3244 if (failed
) /* Generic failure handling: destroy the connection */
3245 bus_enter_closing(sd_bus_message_get_bus(m
));
3250 if (failed
&& match_slot
->floating
)
3251 bus_slot_disconnect(match_slot
, true);
3253 sd_bus_slot_unref(match_slot
);
3258 static int bus_add_match_full(
3263 sd_bus_message_handler_t callback
,
3264 sd_bus_message_handler_t install_callback
,
3267 struct bus_match_component
*components
= NULL
;
3268 unsigned n_components
= 0;
3269 sd_bus_slot
*s
= NULL
;
3272 assert_return(bus
, -EINVAL
);
3273 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3274 assert_return(match
, -EINVAL
);
3275 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3277 r
= bus_match_parse(match
, &components
, &n_components
);
3281 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3287 s
->match_callback
.callback
= callback
;
3288 s
->match_callback
.install_callback
= install_callback
;
3290 if (bus
->bus_client
) {
3291 enum bus_match_scope scope
;
3293 scope
= bus_match_get_scope(components
, n_components
);
3295 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3296 if (scope
!= BUS_MATCH_LOCAL
) {
3298 /* We store the original match string, so that we can use it to remove the match again. */
3300 s
->match_callback
.match_string
= strdup(match
);
3301 if (!s
->match_callback
.match_string
) {
3307 r
= bus_add_match_internal_async(bus
,
3308 &s
->match_callback
.install_slot
,
3309 s
->match_callback
.match_string
,
3316 /* Make the slot of the match call floating now. We need the reference, but we don't
3317 * want that this match pins the bus object, hence we first create it non-floating, but
3318 * then make it floating. */
3319 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3321 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
);
3325 s
->match_added
= true;
3329 bus
->match_callbacks_modified
= true;
3330 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3339 bus_match_parse_free(components
, n_components
);
3340 sd_bus_slot_unref(s
);
3345 _public_
int sd_bus_add_match(
3349 sd_bus_message_handler_t callback
,
3352 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3355 _public_
int sd_bus_add_match_async(
3359 sd_bus_message_handler_t callback
,
3360 sd_bus_message_handler_t install_callback
,
3363 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3366 bool bus_pid_changed(sd_bus
*bus
) {
3369 /* We don't support people creating a bus connection and
3370 * keeping it around over a fork(). Let's complain. */
3372 return bus
->original_pid
!= getpid_cached();
3375 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3376 sd_bus
*bus
= userdata
;
3381 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3383 r
= sd_bus_process(bus
, NULL
);
3385 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3386 bus_enter_closing(bus
);
3392 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3393 sd_bus
*bus
= userdata
;
3398 r
= sd_bus_process(bus
, NULL
);
3400 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3401 bus_enter_closing(bus
);
3407 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3408 sd_bus
*bus
= userdata
;
3415 e
= sd_bus_get_events(bus
);
3421 if (bus
->output_fd
!= bus
->input_fd
) {
3423 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3427 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3429 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3433 r
= sd_bus_get_timeout(bus
, &until
);
3439 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3446 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3453 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3454 bus_enter_closing(bus
);
3459 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3460 sd_bus
*bus
= userdata
;
3464 if (bus
->close_on_exit
) {
3472 int bus_attach_io_events(sd_bus
*bus
) {
3477 if (bus
->input_fd
< 0)
3483 if (!bus
->input_io_event_source
) {
3484 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3488 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3492 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3496 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3498 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3503 if (bus
->output_fd
!= bus
->input_fd
) {
3504 assert(bus
->output_fd
>= 0);
3506 if (!bus
->output_io_event_source
) {
3507 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3511 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3515 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3517 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3526 static void bus_detach_io_events(sd_bus
*bus
) {
3529 if (bus
->input_io_event_source
) {
3530 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3531 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3534 if (bus
->output_io_event_source
) {
3535 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3536 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3540 int bus_attach_inotify_event(sd_bus
*bus
) {
3545 if (bus
->inotify_fd
< 0)
3551 if (!bus
->inotify_event_source
) {
3552 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3556 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3560 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3562 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3569 static void bus_detach_inotify_event(sd_bus
*bus
) {
3572 if (bus
->inotify_event_source
) {
3573 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3574 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3578 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3581 assert_return(bus
, -EINVAL
);
3582 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3583 assert_return(!bus
->event
, -EBUSY
);
3585 assert(!bus
->input_io_event_source
);
3586 assert(!bus
->output_io_event_source
);
3587 assert(!bus
->time_event_source
);
3590 bus
->event
= sd_event_ref(event
);
3592 r
= sd_event_default(&bus
->event
);
3597 bus
->event_priority
= priority
;
3599 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3603 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3607 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3611 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3615 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3619 r
= bus_attach_io_events(bus
);
3623 r
= bus_attach_inotify_event(bus
);
3630 sd_bus_detach_event(bus
);
3634 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3635 assert_return(bus
, -EINVAL
);
3636 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3641 bus_detach_io_events(bus
);
3642 bus_detach_inotify_event(bus
);
3644 if (bus
->time_event_source
) {
3645 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3646 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3649 if (bus
->quit_event_source
) {
3650 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3651 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3654 bus
->event
= sd_event_unref(bus
->event
);
3658 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3659 assert_return(bus
, NULL
);
3664 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3665 assert_return(bus
, NULL
);
3667 return bus
->current_message
;
3670 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3671 assert_return(bus
, NULL
);
3673 return bus
->current_slot
;
3676 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3677 assert_return(bus
, NULL
);
3679 return bus
->current_handler
;
3682 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3683 assert_return(bus
, NULL
);
3685 return bus
->current_userdata
;
3688 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3693 assert(default_bus
);
3696 return !!*default_bus
;
3699 *ret
= sd_bus_ref(*default_bus
);
3707 b
->default_bus_ptr
= default_bus
;
3715 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3716 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3719 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3720 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3723 _public_
int sd_bus_default(sd_bus
**ret
) {
3724 int (*bus_open
)(sd_bus
**) = NULL
;
3727 busp
= bus_choose_default(&bus_open
);
3728 return bus_default(bus_open
, busp
, ret
);
3731 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3732 assert_return(b
, -EINVAL
);
3733 assert_return(tid
, -EINVAL
);
3734 assert_return(!bus_pid_changed(b
), -ECHILD
);
3742 return sd_event_get_tid(b
->event
, tid
);
3747 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3748 _cleanup_free_
char *e
= NULL
;
3751 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3752 assert_return(external_id
, -EINVAL
);
3753 assert_return(ret_path
, -EINVAL
);
3755 e
= bus_label_escape(external_id
);
3759 ret
= strjoin(prefix
, "/", e
);
3767 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3771 assert_return(object_path_is_valid(path
), -EINVAL
);
3772 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3773 assert_return(external_id
, -EINVAL
);
3775 e
= object_path_startswith(path
, prefix
);
3777 *external_id
= NULL
;
3781 ret
= bus_label_unescape(e
);
3789 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3790 _cleanup_strv_free_
char **labels
= NULL
;
3791 char *path
, *path_pos
, **label_pos
;
3792 const char *sep
, *template_pos
;
3797 assert_return(out
, -EINVAL
);
3798 assert_return(path_template
, -EINVAL
);
3800 path_length
= strlen(path_template
);
3802 va_start(list
, path_template
);
3803 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3807 arg
= va_arg(list
, const char *);
3813 label
= bus_label_escape(arg
);
3819 r
= strv_consume(&labels
, label
);
3825 /* add label length, but account for the format character */
3826 path_length
+= strlen(label
) - 1;
3830 path
= malloc(path_length
+ 1);
3837 for (template_pos
= path_template
; *template_pos
; ) {
3838 sep
= strchrnul(template_pos
, '%');
3839 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3843 path_pos
= stpcpy(path_pos
, *label_pos
++);
3844 template_pos
= sep
+ 1;
3852 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3853 _cleanup_strv_free_
char **labels
= NULL
;
3854 const char *template_pos
, *path_pos
;
3860 * This decodes an object-path based on a template argument. The
3861 * template consists of a verbatim path, optionally including special
3864 * - Each occurrence of '%' in the template matches an arbitrary
3865 * substring of a label in the given path. At most one such
3866 * directive is allowed per label. For each such directive, the
3867 * caller must provide an output parameter (char **) via va_arg. If
3868 * NULL is passed, the given label is verified, but not returned.
3869 * For each matched label, the *decoded* label is stored in the
3870 * passed output argument, and the caller is responsible to free
3871 * it. Note that the output arguments are only modified if the
3872 * actualy path matched the template. Otherwise, they're left
3875 * This function returns <0 on error, 0 if the path does not match the
3876 * template, 1 if it matched.
3879 assert_return(path
, -EINVAL
);
3880 assert_return(path_template
, -EINVAL
);
3884 for (template_pos
= path_template
; *template_pos
; ) {
3889 /* verify everything until the next '%' matches verbatim */
3890 sep
= strchrnul(template_pos
, '%');
3891 length
= sep
- template_pos
;
3892 if (strncmp(path_pos
, template_pos
, length
))
3896 template_pos
+= length
;
3901 /* We found the next '%' character. Everything up until here
3902 * matched. We now skip ahead to the end of this label and make
3903 * sure it matches the tail of the label in the path. Then we
3904 * decode the string in-between and save it for later use. */
3906 ++template_pos
; /* skip over '%' */
3908 sep
= strchrnul(template_pos
, '/');
3909 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3911 /* verify the suffixes match */
3912 sep
= strchrnul(path_pos
, '/');
3913 if (sep
- path_pos
< (ssize_t
)length
||
3914 strncmp(sep
- length
, template_pos
, length
))
3917 template_pos
+= length
; /* skip over matched label */
3918 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3920 /* store unescaped label for later use */
3921 label
= bus_label_unescape_n(path_pos
, length
);
3925 r
= strv_consume(&labels
, label
);
3929 path_pos
= sep
; /* skip decoded label and suffix */
3932 /* end of template must match end of path */
3936 /* copy the labels over to the caller */
3937 va_start(list
, path_template
);
3938 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3941 arg
= va_arg(list
, char **);
3949 labels
= mfree(labels
);
3953 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3954 assert_return(bus
, -EINVAL
);
3955 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3956 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3961 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3962 assert_return(bus
, -EINVAL
);
3963 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3964 assert_return(description
, -EINVAL
);
3965 assert_return(bus
->description
, -ENXIO
);
3966 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3968 if (bus
->description
)
3969 *description
= bus
->description
;
3970 else if (bus
->is_system
)
3971 *description
= "system";
3972 else if (bus
->is_user
)
3973 *description
= "user";
3975 *description
= NULL
;
3980 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
3981 assert_return(bus
, -EINVAL
);
3982 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3983 assert_return(scope
, -EINVAL
);
3984 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3991 if (bus
->is_system
) {
3999 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4001 assert_return(bus
, -EINVAL
);
4002 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4003 assert_return(address
, -EINVAL
);
4004 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4007 *address
= bus
->address
;
4014 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4015 assert_return(bus
, -EINVAL
);
4016 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4017 assert_return(mask
, -EINVAL
);
4018 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4020 *mask
= bus
->creds_mask
;
4024 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4025 assert_return(bus
, -EINVAL
);
4026 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4027 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4029 return bus
->bus_client
;
4032 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4033 assert_return(bus
, -EINVAL
);
4034 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4035 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4037 return bus
->is_server
;
4040 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4041 assert_return(bus
, -EINVAL
);
4042 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4043 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4045 return bus
->anonymous_auth
;
4048 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4049 assert_return(bus
, -EINVAL
);
4050 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4051 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4053 return bus
->trusted
;
4056 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4057 assert_return(bus
, -EINVAL
);
4058 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4059 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4061 return bus
->is_monitor
;
4064 static void flush_close(sd_bus
*bus
) {
4068 /* Flushes and closes the specified bus. We take a ref before,
4069 * to ensure the flushing does not cause the bus to be
4072 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4075 _public_
void sd_bus_default_flush_close(void) {
4076 flush_close(default_starter_bus
);
4077 flush_close(default_user_bus
);
4078 flush_close(default_system_bus
);
4081 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4082 assert_return(bus
, -EINVAL
);
4083 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4085 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4086 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4087 * from the client side. */
4088 bus
->exit_on_disconnect
= b
;
4090 /* If the exit condition was triggered already, exit immediately. */
4091 return bus_exit_now(bus
);
4094 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4095 assert_return(bus
, -EINVAL
);
4096 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4098 return bus
->exit_on_disconnect
;
4101 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4102 assert_return(bus
, -EINVAL
);
4103 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4104 assert_return(!bus
->bus_client
, -EPERM
);
4105 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4107 return free_and_strdup(&bus
->patch_sender
, sender
);
4110 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4111 assert_return(bus
, -EINVAL
);
4112 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4113 assert_return(ret
, -EINVAL
);
4115 if (!bus
->patch_sender
)
4118 *ret
= bus
->patch_sender
;
4122 _public_
int sd_bus_get_n_queued_read(sd_bus
*bus
, uint64_t *ret
) {
4123 assert_return(bus
, -EINVAL
);
4124 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4125 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4126 assert_return(ret
, -EINVAL
);
4128 *ret
= bus
->rqueue_size
;
4132 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4133 assert_return(bus
, -EINVAL
);
4134 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4135 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4136 assert_return(ret
, -EINVAL
);
4138 *ret
= bus
->wqueue_size
;
4142 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4143 assert_return(bus
, -EINVAL
);
4144 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4146 bus
->method_call_timeout
= usec
;
4150 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4154 assert_return(bus
, -EINVAL
);
4155 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4156 assert_return(ret
, -EINVAL
);
4158 if (bus
->method_call_timeout
!= 0) {
4159 *ret
= bus
->method_call_timeout
;
4163 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4164 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4165 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4166 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4167 *ret
= bus
->method_call_timeout
= usec
;
4171 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4175 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4176 assert_return(bus
, -EINVAL
);
4177 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4179 bus
->close_on_exit
= b
;
4183 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4184 assert_return(bus
, -EINVAL
);
4185 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4187 return bus
->close_on_exit
;