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 "path-util.h"
40 #include "process-util.h"
41 #include "string-util.h"
44 #define log_debug_bus_message(m) \
46 sd_bus_message *_mm = (m); \
47 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", \
48 bus_message_type_to_string(_mm->header->type), \
49 strna(sd_bus_message_get_sender(_mm)), \
50 strna(sd_bus_message_get_destination(_mm)), \
51 strna(sd_bus_message_get_path(_mm)), \
52 strna(sd_bus_message_get_interface(_mm)), \
53 strna(sd_bus_message_get_member(_mm)), \
54 BUS_MESSAGE_COOKIE(_mm), \
56 strna(_mm->root_container.signature), \
57 strna(_mm->error.name), \
58 strna(_mm->error.message)); \
61 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
);
62 static void bus_detach_io_events(sd_bus
*b
);
63 static void bus_detach_inotify_event(sd_bus
*b
);
65 static thread_local sd_bus
*default_system_bus
= NULL
;
66 static thread_local sd_bus
*default_user_bus
= NULL
;
67 static thread_local sd_bus
*default_starter_bus
= NULL
;
69 static sd_bus
**bus_choose_default(int (**bus_open
)(sd_bus
**)) {
72 /* Let's try our best to reuse another cached connection. If
73 * the starter bus type is set, connect via our normal
74 * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
75 * we can share the connection with the user/system default
78 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
80 if (streq(e
, "system")) {
82 *bus_open
= sd_bus_open_system
;
83 return &default_system_bus
;
84 } else if (STR_IN_SET(e
, "user", "session")) {
86 *bus_open
= sd_bus_open_user
;
87 return &default_user_bus
;
91 /* No type is specified, so we have not other option than to
92 * use the starter address if it is set. */
93 e
= secure_getenv("DBUS_STARTER_ADDRESS");
96 *bus_open
= sd_bus_open
;
97 return &default_starter_bus
;
100 /* Finally, if nothing is set use the cached connection for
103 if (cg_pid_get_owner_uid(0, NULL
) >= 0) {
105 *bus_open
= sd_bus_open_user
;
106 return &default_user_bus
;
109 *bus_open
= sd_bus_open_system
;
110 return &default_system_bus
;
114 sd_bus
*bus_resolve(sd_bus
*bus
) {
115 switch ((uintptr_t) bus
) {
116 case (uintptr_t) SD_BUS_DEFAULT
:
117 return *(bus_choose_default(NULL
));
118 case (uintptr_t) SD_BUS_DEFAULT_USER
:
119 return default_user_bus
;
120 case (uintptr_t) SD_BUS_DEFAULT_SYSTEM
:
121 return default_system_bus
;
127 void bus_close_io_fds(sd_bus
*b
) {
130 bus_detach_io_events(b
);
132 if (b
->input_fd
!= b
->output_fd
)
133 safe_close(b
->output_fd
);
134 b
->output_fd
= b
->input_fd
= safe_close(b
->input_fd
);
137 void bus_close_inotify_fd(sd_bus
*b
) {
140 bus_detach_inotify_event(b
);
142 b
->inotify_fd
= safe_close(b
->inotify_fd
);
143 b
->inotify_watches
= mfree(b
->inotify_watches
);
144 b
->n_inotify_watches
= 0;
147 static void bus_reset_queues(sd_bus
*b
) {
150 while (b
->rqueue_size
> 0)
151 bus_message_unref_queued(b
->rqueue
[--b
->rqueue_size
], b
);
153 b
->rqueue
= mfree(b
->rqueue
);
154 b
->rqueue_allocated
= 0;
156 while (b
->wqueue_size
> 0)
157 bus_message_unref_queued(b
->wqueue
[--b
->wqueue_size
], b
);
159 b
->wqueue
= mfree(b
->wqueue
);
160 b
->wqueue_allocated
= 0;
163 static sd_bus
* bus_free(sd_bus
*b
) {
167 assert(!b
->track_queue
);
170 b
->state
= BUS_CLOSED
;
172 sd_bus_detach_event(b
);
174 while ((s
= b
->slots
)) {
175 /* At this point only floating slots can still be
176 * around, because the non-floating ones keep a
177 * reference to the bus, and we thus couldn't be
178 * destructing right now... We forcibly disconnect the
179 * slots here, so that they still can be referenced by
180 * apps, but are dead. */
183 bus_slot_disconnect(s
, true);
186 if (b
->default_bus_ptr
)
187 *b
->default_bus_ptr
= NULL
;
190 bus_close_inotify_fd(b
);
195 free(b
->unique_name
);
196 free(b
->auth_buffer
);
199 free(b
->description
);
200 free(b
->patch_sender
);
203 strv_free(b
->exec_argv
);
205 close_many(b
->fds
, b
->n_fds
);
210 ordered_hashmap_free_free(b
->reply_callbacks
);
211 prioq_free(b
->reply_callbacks_prioq
);
213 assert(b
->match_callbacks
.type
== BUS_MATCH_ROOT
);
214 bus_match_free(&b
->match_callbacks
);
216 hashmap_free_free(b
->vtable_methods
);
217 hashmap_free_free(b
->vtable_properties
);
219 assert(hashmap_isempty(b
->nodes
));
220 hashmap_free(b
->nodes
);
224 assert_se(pthread_mutex_destroy(&b
->memfd_cache_mutex
) == 0);
229 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus
*, bus_free
);
231 _public_
int sd_bus_new(sd_bus
**ret
) {
232 _cleanup_free_ sd_bus
*b
= NULL
;
234 assert_return(ret
, -EINVAL
);
245 .message_version
= 1,
246 .creds_mask
= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
,
248 .original_pid
= getpid_cached(),
249 .n_groups
= (size_t) -1,
250 .close_on_exit
= true,
253 /* We guarantee that wqueue always has space for at least one entry */
254 if (!GREEDY_REALLOC(b
->wqueue
, b
->wqueue_allocated
, 1))
257 assert_se(pthread_mutex_init(&b
->memfd_cache_mutex
, NULL
) == 0);
263 _public_
int sd_bus_set_address(sd_bus
*bus
, const char *address
) {
264 assert_return(bus
, -EINVAL
);
265 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
266 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
267 assert_return(address
, -EINVAL
);
268 assert_return(!bus_pid_changed(bus
), -ECHILD
);
270 return free_and_strdup(&bus
->address
, address
);
273 _public_
int sd_bus_set_fd(sd_bus
*bus
, int input_fd
, int output_fd
) {
274 assert_return(bus
, -EINVAL
);
275 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
276 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
277 assert_return(input_fd
>= 0, -EBADF
);
278 assert_return(output_fd
>= 0, -EBADF
);
279 assert_return(!bus_pid_changed(bus
), -ECHILD
);
281 bus
->input_fd
= input_fd
;
282 bus
->output_fd
= output_fd
;
286 _public_
int sd_bus_set_exec(sd_bus
*bus
, const char *path
, char *const argv
[]) {
287 _cleanup_strv_free_
char **a
= NULL
;
290 assert_return(bus
, -EINVAL
);
291 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
292 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
293 assert_return(path
, -EINVAL
);
294 assert_return(!strv_isempty(argv
), -EINVAL
);
295 assert_return(!bus_pid_changed(bus
), -ECHILD
);
301 r
= free_and_strdup(&bus
->exec_path
, path
);
305 return strv_free_and_replace(bus
->exec_argv
, a
);
308 _public_
int sd_bus_set_bus_client(sd_bus
*bus
, int b
) {
309 assert_return(bus
, -EINVAL
);
310 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
311 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
312 assert_return(!bus
->patch_sender
, -EPERM
);
313 assert_return(!bus_pid_changed(bus
), -ECHILD
);
315 bus
->bus_client
= !!b
;
319 _public_
int sd_bus_set_monitor(sd_bus
*bus
, int b
) {
320 assert_return(bus
, -EINVAL
);
321 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
322 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
323 assert_return(!bus_pid_changed(bus
), -ECHILD
);
325 bus
->is_monitor
= !!b
;
329 _public_
int sd_bus_negotiate_fds(sd_bus
*bus
, int b
) {
330 assert_return(bus
, -EINVAL
);
331 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
332 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
333 assert_return(!bus_pid_changed(bus
), -ECHILD
);
335 bus
->accept_fd
= !!b
;
339 _public_
int sd_bus_negotiate_timestamp(sd_bus
*bus
, int b
) {
340 assert_return(bus
, -EINVAL
);
341 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
342 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
343 assert_return(!bus_pid_changed(bus
), -ECHILD
);
345 /* This is not actually supported by any of our transports these days, but we do honour it for synthetic
346 * replies, and maybe one day classic D-Bus learns this too */
347 bus
->attach_timestamp
= !!b
;
352 _public_
int sd_bus_negotiate_creds(sd_bus
*bus
, int b
, uint64_t mask
) {
353 assert_return(bus
, -EINVAL
);
354 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
355 assert_return(mask
<= _SD_BUS_CREDS_ALL
, -EINVAL
);
356 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
357 assert_return(!bus_pid_changed(bus
), -ECHILD
);
359 SET_FLAG(bus
->creds_mask
, mask
, b
);
361 /* The well knowns we need unconditionally, so that matches can work */
362 bus
->creds_mask
|= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
;
367 _public_
int sd_bus_set_server(sd_bus
*bus
, int b
, sd_id128_t server_id
) {
368 assert_return(bus
, -EINVAL
);
369 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
370 assert_return(b
|| sd_id128_equal(server_id
, SD_ID128_NULL
), -EINVAL
);
371 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
372 assert_return(!bus_pid_changed(bus
), -ECHILD
);
374 bus
->is_server
= !!b
;
375 bus
->server_id
= server_id
;
379 _public_
int sd_bus_set_anonymous(sd_bus
*bus
, int b
) {
380 assert_return(bus
, -EINVAL
);
381 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
382 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
383 assert_return(!bus_pid_changed(bus
), -ECHILD
);
385 bus
->anonymous_auth
= !!b
;
389 _public_
int sd_bus_set_trusted(sd_bus
*bus
, int b
) {
390 assert_return(bus
, -EINVAL
);
391 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
392 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
393 assert_return(!bus_pid_changed(bus
), -ECHILD
);
399 _public_
int sd_bus_set_description(sd_bus
*bus
, const char *description
) {
400 assert_return(bus
, -EINVAL
);
401 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
402 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
403 assert_return(!bus_pid_changed(bus
), -ECHILD
);
405 return free_and_strdup(&bus
->description
, description
);
408 _public_
int sd_bus_set_allow_interactive_authorization(sd_bus
*bus
, int b
) {
409 assert_return(bus
, -EINVAL
);
410 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
411 assert_return(!bus_pid_changed(bus
), -ECHILD
);
413 bus
->allow_interactive_authorization
= !!b
;
417 _public_
int sd_bus_get_allow_interactive_authorization(sd_bus
*bus
) {
418 assert_return(bus
, -EINVAL
);
419 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
420 assert_return(!bus_pid_changed(bus
), -ECHILD
);
422 return bus
->allow_interactive_authorization
;
425 _public_
int sd_bus_set_watch_bind(sd_bus
*bus
, int b
) {
426 assert_return(bus
, -EINVAL
);
427 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
428 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
429 assert_return(!bus_pid_changed(bus
), -ECHILD
);
431 bus
->watch_bind
= !!b
;
435 _public_
int sd_bus_get_watch_bind(sd_bus
*bus
) {
436 assert_return(bus
, -EINVAL
);
437 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
438 assert_return(!bus_pid_changed(bus
), -ECHILD
);
440 return bus
->watch_bind
;
443 _public_
int sd_bus_set_connected_signal(sd_bus
*bus
, int b
) {
444 assert_return(bus
, -EINVAL
);
445 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
446 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
447 assert_return(!bus_pid_changed(bus
), -ECHILD
);
449 bus
->connected_signal
= !!b
;
453 _public_
int sd_bus_get_connected_signal(sd_bus
*bus
) {
454 assert_return(bus
, -EINVAL
);
455 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
456 assert_return(!bus_pid_changed(bus
), -ECHILD
);
458 return bus
->connected_signal
;
461 static int synthesize_connected_signal(sd_bus
*bus
) {
462 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
467 /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called
468 * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the
469 * Hello() reply. Or in other words, whenever we enter BUS_RUNNING state.
471 * This is useful so that clients can start doing stuff whenever the connection is fully established in a way
472 * that works independently from whether we connected to a full bus or just a direct connection. */
474 if (!bus
->connected_signal
)
477 r
= sd_bus_message_new_signal(
480 "/org/freedesktop/DBus/Local",
481 "org.freedesktop.DBus.Local",
486 bus_message_set_sender_local(bus
, m
);
488 r
= bus_seal_synthetic_message(bus
, m
);
492 r
= bus_rqueue_make_room(bus
);
496 /* Insert at the very front */
497 memmove(bus
->rqueue
+ 1, bus
->rqueue
, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
498 bus
->rqueue
[0] = bus_message_ref_queued(m
, bus
);
504 void bus_set_state(sd_bus
*bus
, enum bus_state state
) {
506 static const char * const table
[_BUS_STATE_MAX
] = {
507 [BUS_UNSET
] = "UNSET",
508 [BUS_WATCH_BIND
] = "WATCH_BIND",
509 [BUS_OPENING
] = "OPENING",
510 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
511 [BUS_HELLO
] = "HELLO",
512 [BUS_RUNNING
] = "RUNNING",
513 [BUS_CLOSING
] = "CLOSING",
514 [BUS_CLOSED
] = "CLOSED",
518 assert(state
< _BUS_STATE_MAX
);
520 if (state
== bus
->state
)
523 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
527 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
535 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
537 r
= sd_bus_message_get_errno(reply
);
541 r
= sd_bus_message_read(reply
, "s", &s
);
545 if (!service_name_is_valid(s
) || s
[0] != ':')
548 r
= free_and_strdup(&bus
->unique_name
, s
);
552 if (bus
->state
== BUS_HELLO
) {
553 bus_set_state(bus
, BUS_RUNNING
);
555 r
= synthesize_connected_signal(bus
);
563 static int bus_send_hello(sd_bus
*bus
) {
564 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
569 if (!bus
->bus_client
)
572 r
= sd_bus_message_new_method_call(
575 "org.freedesktop.DBus",
576 "/org/freedesktop/DBus",
577 "org.freedesktop.DBus",
582 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
585 int bus_start_running(sd_bus
*bus
) {
586 struct reply_callback
*c
;
592 assert(bus
->state
< BUS_HELLO
);
594 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
595 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
596 * adding a fixed value to all entries should not alter the internal order. */
598 n
= now(CLOCK_MONOTONIC
);
599 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
600 if (c
->timeout_usec
== 0)
603 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
606 if (bus
->bus_client
) {
607 bus_set_state(bus
, BUS_HELLO
);
611 bus_set_state(bus
, BUS_RUNNING
);
613 r
= synthesize_connected_signal(bus
);
620 static int parse_address_key(const char **p
, const char *key
, char **value
) {
621 size_t l
, n
= 0, allocated
= 0;
622 _cleanup_free_
char *r
= NULL
;
631 if (strncmp(*p
, key
, l
) != 0)
644 while (!IN_SET(*a
, ';', ',', 0)) {
658 c
= (char) ((x
<< 4) | y
);
665 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
683 free_and_replace(*value
, r
);
688 static void skip_address_key(const char **p
) {
692 *p
+= strcspn(*p
, ",");
698 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
699 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
708 while (!IN_SET(**p
, 0, ';')) {
709 r
= parse_address_key(p
, "guid", guid
);
715 r
= parse_address_key(p
, "path", &path
);
721 r
= parse_address_key(p
, "abstract", &abstract
);
730 if (!path
&& !abstract
)
733 if (path
&& abstract
)
738 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
741 b
->sockaddr
.un
= (struct sockaddr_un
) {
742 .sun_family
= AF_UNIX
,
745 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
746 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
751 l
= strlen(abstract
);
752 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
755 b
->sockaddr
.un
= (struct sockaddr_un
) {
756 .sun_family
= AF_UNIX
,
759 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
760 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
768 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
769 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
771 struct addrinfo
*result
, hints
= {
772 .ai_socktype
= SOCK_STREAM
,
773 .ai_flags
= AI_ADDRCONFIG
,
781 while (!IN_SET(**p
, 0, ';')) {
782 r
= parse_address_key(p
, "guid", guid
);
788 r
= parse_address_key(p
, "host", &host
);
794 r
= parse_address_key(p
, "port", &port
);
800 r
= parse_address_key(p
, "family", &family
);
813 if (streq(family
, "ipv4"))
814 hints
.ai_family
= AF_INET
;
815 else if (streq(family
, "ipv6"))
816 hints
.ai_family
= AF_INET6
;
821 r
= getaddrinfo(host
, port
, &hints
, &result
);
825 return -EADDRNOTAVAIL
;
827 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
828 b
->sockaddr_size
= result
->ai_addrlen
;
830 freeaddrinfo(result
);
837 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
839 unsigned n_argv
= 0, j
;
841 size_t allocated
= 0;
849 while (!IN_SET(**p
, 0, ';')) {
850 r
= parse_address_key(p
, "guid", guid
);
856 r
= parse_address_key(p
, "path", &path
);
862 if (startswith(*p
, "argv")) {
866 ul
= strtoul(*p
+ 4, (char**) p
, 10);
867 if (errno
> 0 || **p
!= '=' || ul
> 256) {
875 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
883 r
= parse_address_key(p
, NULL
, argv
+ ul
);
898 /* Make sure there are no holes in the array, with the
899 * exception of argv[0] */
900 for (j
= 1; j
< n_argv
; j
++)
906 if (argv
&& argv
[0] == NULL
) {
907 argv
[0] = strdup(path
);
922 for (j
= 0; j
< n_argv
; j
++)
930 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
931 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
939 while (!IN_SET(**p
, 0, ';')) {
940 r
= parse_address_key(p
, "guid", guid
);
946 r
= parse_address_key(p
, "machine", &machine
);
952 r
= parse_address_key(p
, "pid", &pid
);
961 if (!machine
== !pid
)
965 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
968 free_and_replace(b
->machine
, machine
);
970 b
->machine
= mfree(b
->machine
);
974 r
= parse_pid(pid
, &b
->nspid
);
980 b
->sockaddr
.un
= (struct sockaddr_un
) {
981 .sun_family
= AF_UNIX
,
982 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
983 .sun_path
= "/var/run/dbus/system_bus_socket",
985 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
991 static void bus_reset_parsed_address(sd_bus
*b
) {
995 b
->sockaddr_size
= 0;
996 b
->exec_argv
= strv_free(b
->exec_argv
);
997 b
->exec_path
= mfree(b
->exec_path
);
998 b
->server_id
= SD_ID128_NULL
;
999 b
->machine
= mfree(b
->machine
);
1003 static int bus_parse_next_address(sd_bus
*b
) {
1004 _cleanup_free_
char *guid
= NULL
;
1012 if (b
->address
[b
->address_index
] == 0)
1015 bus_reset_parsed_address(b
);
1017 a
= b
->address
+ b
->address_index
;
1026 if (startswith(a
, "unix:")) {
1029 r
= parse_unix_address(b
, &a
, &guid
);
1034 } else if (startswith(a
, "tcp:")) {
1037 r
= parse_tcp_address(b
, &a
, &guid
);
1043 } else if (startswith(a
, "unixexec:")) {
1046 r
= parse_exec_address(b
, &a
, &guid
);
1052 } else if (startswith(a
, "x-machine-unix:")) {
1055 r
= parse_container_unix_address(b
, &a
, &guid
);
1068 r
= sd_id128_from_string(guid
, &b
->server_id
);
1073 b
->address_index
= a
- b
->address
;
1077 static void bus_kill_exec(sd_bus
*bus
) {
1078 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1079 sigterm_wait(bus
->busexec_pid
);
1080 bus
->busexec_pid
= 0;
1084 static int bus_start_address(sd_bus
*b
) {
1090 bus_close_io_fds(b
);
1091 bus_close_inotify_fd(b
);
1095 /* If you provide multiple different bus-addresses, we
1096 * try all of them in order and use the first one that
1100 r
= bus_socket_exec(b
);
1101 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1102 r
= bus_container_connect_socket(b
);
1103 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1104 r
= bus_socket_connect(b
);
1111 q
= bus_attach_io_events(b
);
1115 q
= bus_attach_inotify_event(b
);
1122 b
->last_connect_error
= -r
;
1125 r
= bus_parse_next_address(b
);
1129 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1133 int bus_next_address(sd_bus
*b
) {
1136 bus_reset_parsed_address(b
);
1137 return bus_start_address(b
);
1140 static int bus_start_fd(sd_bus
*b
) {
1145 assert(b
->input_fd
>= 0);
1146 assert(b
->output_fd
>= 0);
1148 r
= fd_nonblock(b
->input_fd
, true);
1152 r
= fd_cloexec(b
->input_fd
, true);
1156 if (b
->input_fd
!= b
->output_fd
) {
1157 r
= fd_nonblock(b
->output_fd
, true);
1161 r
= fd_cloexec(b
->output_fd
, true);
1166 if (fstat(b
->input_fd
, &st
) < 0)
1169 return bus_socket_take_fd(b
);
1172 _public_
int sd_bus_start(sd_bus
*bus
) {
1175 assert_return(bus
, -EINVAL
);
1176 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1177 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1178 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1180 bus_set_state(bus
, BUS_OPENING
);
1182 if (bus
->is_server
&& bus
->bus_client
)
1185 if (bus
->input_fd
>= 0)
1186 r
= bus_start_fd(bus
);
1187 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1188 r
= bus_start_address(bus
);
1197 return bus_send_hello(bus
);
1200 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1202 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1205 assert_return(ret
, -EINVAL
);
1207 /* Let's connect to the starter bus if it is set, and
1208 * otherwise to the bus that is appropriate for the scope
1209 * we are running in */
1211 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1213 if (streq(e
, "system"))
1214 return sd_bus_open_system_with_description(ret
, description
);
1215 else if (STR_IN_SET(e
, "session", "user"))
1216 return sd_bus_open_user_with_description(ret
, description
);
1219 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1221 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1222 return sd_bus_open_user_with_description(ret
, description
);
1224 return sd_bus_open_system_with_description(ret
, description
);
1231 r
= sd_bus_set_address(b
, e
);
1235 b
->bus_client
= true;
1237 /* We don't know whether the bus is trusted or not, so better
1238 * be safe, and authenticate everything */
1240 b
->is_local
= false;
1241 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1243 r
= sd_bus_start(b
);
1251 _public_
int sd_bus_open(sd_bus
**ret
) {
1252 return sd_bus_open_with_description(ret
, NULL
);
1255 int bus_set_address_system(sd_bus
*b
) {
1259 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1261 return sd_bus_set_address(b
, e
);
1263 return sd_bus_set_address(b
, DEFAULT_SYSTEM_BUS_ADDRESS
);
1266 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1267 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1270 assert_return(ret
, -EINVAL
);
1277 r
= sd_bus_set_description(b
, description
);
1282 r
= bus_set_address_system(b
);
1286 b
->bus_client
= true;
1287 b
->is_system
= true;
1289 /* Let's do per-method access control on the system bus. We
1290 * need the caller's UID and capability set for that. */
1292 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1295 r
= sd_bus_start(b
);
1303 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1304 return sd_bus_open_system_with_description(ret
, NULL
);
1307 int bus_set_address_user(sd_bus
*b
) {
1309 _cleanup_free_
char *ee
= NULL
, *s
= NULL
;
1313 e
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1315 return sd_bus_set_address(b
, e
);
1317 e
= secure_getenv("XDG_RUNTIME_DIR");
1321 ee
= bus_address_escape(e
);
1325 if (asprintf(&s
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1328 b
->address
= TAKE_PTR(s
);
1333 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1334 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1337 assert_return(ret
, -EINVAL
);
1344 r
= sd_bus_set_description(b
, description
);
1349 r
= bus_set_address_user(b
);
1353 b
->bus_client
= true;
1356 /* We don't do any per-method access control on the user
1361 r
= sd_bus_start(b
);
1369 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1370 return sd_bus_open_user_with_description(ret
, NULL
);
1373 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1374 _cleanup_free_
char *e
= NULL
;
1375 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1380 /* Skip ":"s in ipv6 addresses */
1384 rbracket
= strchr(host
, ']');
1387 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1388 e
= bus_address_escape(t
);
1391 } else if ((a
= strchr(host
, '@'))) {
1392 if (*(a
+ 1) == '[') {
1393 _cleanup_free_
char *t
= NULL
;
1395 rbracket
= strchr(a
+ 1, ']');
1398 t
= new0(char, strlen(host
));
1401 strncat(t
, host
, a
- host
+ 1);
1402 strncat(t
, a
+ 2, rbracket
- a
- 2);
1403 e
= bus_address_escape(t
);
1406 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1410 /* Let's see if a port was given */
1411 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1414 bool got_forward_slash
= false;
1420 p
= strndupa(p
, t
- p
);
1421 got_forward_slash
= true;
1424 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1425 if (!machine_name_is_valid(p
) || got_forward_slash
)
1429 goto interpret_port_as_machine_old_syntax
;
1433 /* Let's see if a machine was given */
1434 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1437 interpret_port_as_machine_old_syntax
:
1438 /* Let's make sure this is not a port of some kind,
1439 * and is a valid machine name. */
1440 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1441 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1447 t
= strndupa(host
, strcspn(host
, ":/"));
1449 e
= bus_address_escape(t
);
1454 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1455 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1456 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1460 return free_and_replace(b
->address
, a
);
1463 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1464 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1467 assert_return(host
, -EINVAL
);
1468 assert_return(ret
, -EINVAL
);
1474 r
= bus_set_address_system_remote(b
, host
);
1478 b
->bus_client
= true;
1480 b
->is_system
= true;
1481 b
->is_local
= false;
1483 r
= sd_bus_start(b
);
1491 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1492 _cleanup_free_
char *e
= NULL
;
1498 e
= bus_address_escape(machine
);
1502 a
= strjoin("x-machine-unix:machine=", e
);
1506 return free_and_replace(b
->address
, a
);
1509 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1510 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1513 assert_return(machine
, -EINVAL
);
1514 assert_return(ret
, -EINVAL
);
1515 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1521 r
= bus_set_address_system_machine(b
, machine
);
1525 b
->bus_client
= true;
1527 b
->is_system
= true;
1528 b
->is_local
= false;
1530 r
= sd_bus_start(b
);
1538 _public_
void sd_bus_close(sd_bus
*bus
) {
1541 if (bus
->state
== BUS_CLOSED
)
1543 if (bus_pid_changed(bus
))
1546 /* Don't leave ssh hanging around */
1549 bus_set_state(bus
, BUS_CLOSED
);
1551 sd_bus_detach_event(bus
);
1553 /* Drop all queued messages so that they drop references to
1554 * the bus object and the bus may be freed */
1555 bus_reset_queues(bus
);
1557 bus_close_io_fds(bus
);
1558 bus_close_inotify_fd(bus
);
1561 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1567 return sd_bus_unref(bus
);
1570 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1574 /* Have to do this before flush() to prevent hang */
1578 return sd_bus_close_unref(bus
);
1581 void bus_enter_closing(sd_bus
*bus
) {
1584 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1587 bus_set_state(bus
, BUS_CLOSING
);
1590 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1592 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1593 assert_return(bus
, -EINVAL
);
1594 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1595 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1597 return BUS_IS_OPEN(bus
->state
);
1600 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1601 assert_return(bus
, -EINVAL
);
1602 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1603 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1605 return bus
->state
== BUS_RUNNING
;
1608 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1611 assert_return(bus
, -EINVAL
);
1612 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1613 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1614 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1616 if (bus
->is_monitor
)
1619 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1620 if (!bus
->accept_fd
)
1623 r
= bus_ensure_running(bus
);
1627 return bus
->can_fds
;
1630 return bus_type_is_valid(type
);
1633 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1636 assert_return(bus
, -EINVAL
);
1637 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1638 assert_return(id
, -EINVAL
);
1639 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1641 r
= bus_ensure_running(bus
);
1645 *id
= bus
->server_id
;
1649 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1651 static uint64_t cookie_inc(uint64_t cookie
) {
1653 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1654 if (cookie
>= UINT32_MAX
)
1655 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1656 * whether we are looping. */
1661 static int next_cookie(sd_bus
*b
) {
1662 uint64_t new_cookie
;
1666 new_cookie
= cookie_inc(b
->cookie
);
1668 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1669 * least once, but then do it thorougly. */
1670 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1673 /* Check if the cookie is currently in use. If so, pick the next one */
1674 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1675 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1678 new_cookie
= cookie_inc(new_cookie
);
1681 /* Can't fulfill request */
1686 b
->cookie
= new_cookie
;
1690 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1697 /* If we copy the same message to multiple
1698 * destinations, avoid using the same cookie
1700 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1705 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1710 if (!m
->sender
&& b
->patch_sender
) {
1711 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1720 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1723 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1724 bool remarshal
= false;
1728 /* wrong packet version */
1729 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1732 /* wrong packet endianness */
1733 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1736 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1739 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1743 /* Fake some timestamps, if they were requested, and not
1744 * already initialized */
1745 if (b
->attach_timestamp
) {
1746 if (m
->realtime
<= 0)
1747 m
->realtime
= now(CLOCK_REALTIME
);
1749 if (m
->monotonic
<= 0)
1750 m
->monotonic
= now(CLOCK_MONOTONIC
);
1753 /* The bus specification says the serial number cannot be 0,
1754 * hence let's fill something in for synthetic messages. Since
1755 * synthetic messages might have a fake sender and we don't
1756 * want to interfere with the real sender's serial numbers we
1757 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1758 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1759 * even though kdbus can do 64bit. */
1760 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1763 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1769 r
= bus_socket_write_message(bus
, m
, idx
);
1773 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1774 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",
1775 bus_message_type_to_string(m
->header
->type
),
1776 strna(sd_bus_message_get_sender(m
)),
1777 strna(sd_bus_message_get_destination(m
)),
1778 strna(sd_bus_message_get_path(m
)),
1779 strna(sd_bus_message_get_interface(m
)),
1780 strna(sd_bus_message_get_member(m
)),
1781 BUS_MESSAGE_COOKIE(m
),
1783 strna(m
->root_container
.signature
),
1784 strna(m
->error
.name
),
1785 strna(m
->error
.message
));
1790 static int dispatch_wqueue(sd_bus
*bus
) {
1794 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1796 while (bus
->wqueue_size
> 0) {
1798 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1802 /* Didn't do anything this time */
1804 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1805 /* Fully written. Let's drop the entry from
1808 * This isn't particularly optimized, but
1809 * well, this is supposed to be our worst-case
1810 * buffer only, and the socket buffer is
1811 * supposed to be our primary buffer, and if
1812 * it got full, then all bets are off
1816 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1817 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1827 static int bus_read_message(sd_bus
*bus
, bool hint_priority
, int64_t priority
) {
1830 return bus_socket_read_message(bus
);
1833 int bus_rqueue_make_room(sd_bus
*bus
) {
1836 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1839 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1845 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1847 assert(i
< bus
->rqueue_size
);
1849 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1850 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1854 static int dispatch_rqueue(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**m
) {
1859 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1861 /* Note that the priority logic is only available on kdbus,
1862 * where the rqueue is unused. We check the rqueue here
1863 * anyway, because it's simple... */
1866 if (bus
->rqueue_size
> 0) {
1867 /* Dispatch a queued message */
1868 *m
= sd_bus_message_ref(bus
->rqueue
[0]);
1869 rqueue_drop_one(bus
, 0);
1873 /* Try to read a new message */
1874 r
= bus_read_message(bus
, hint_priority
, priority
);
1886 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1887 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1890 assert_return(m
, -EINVAL
);
1895 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1897 if (!BUS_IS_OPEN(bus
->state
))
1901 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1908 /* If the cookie number isn't kept, then we know that no reply
1910 if (!cookie
&& !m
->sealed
)
1911 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1913 r
= bus_seal_message(bus
, m
, 0);
1917 /* Remarshall if we have to. This will possibly unref the
1918 * message and place a replacement in m */
1919 r
= bus_remarshal_message(bus
, &m
);
1923 /* If this is a reply and no reply was requested, then let's
1924 * suppress this, if we can */
1928 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1931 r
= bus_write_message(bus
, m
, &idx
);
1933 if (ERRNO_IS_DISCONNECT(r
)) {
1934 bus_enter_closing(bus
);
1941 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1942 /* Wasn't fully written. So let's remember how
1943 * much was written. Note that the first entry
1944 * of the wqueue array is always allocated so
1945 * that we always can remember how much was
1947 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1948 bus
->wqueue_size
= 1;
1953 /* Just append it to the queue. */
1955 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1958 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1961 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1966 *cookie
= BUS_MESSAGE_COOKIE(m
);
1971 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1974 assert_return(m
, -EINVAL
);
1979 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1981 if (!BUS_IS_OPEN(bus
->state
))
1984 if (!streq_ptr(m
->destination
, destination
)) {
1989 r
= sd_bus_message_set_destination(m
, destination
);
1994 return sd_bus_send(bus
, m
, cookie
);
1997 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
2000 if (usec
== (uint64_t) -1)
2003 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2004 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2005 * relative timestamp, and afterwards the absolute one. */
2007 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2010 return now(CLOCK_MONOTONIC
) + usec
;
2013 static int timeout_compare(const void *a
, const void *b
) {
2014 const struct reply_callback
*x
= a
, *y
= b
;
2016 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2019 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2022 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2025 _public_
int sd_bus_call_async(
2029 sd_bus_message_handler_t callback
,
2033 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2034 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2037 assert_return(m
, -EINVAL
);
2038 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2039 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2044 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2046 if (!BUS_IS_OPEN(bus
->state
))
2049 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2050 if (!callback
&& !slot
&& !m
->sealed
)
2051 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2053 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2057 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2061 r
= bus_seal_message(bus
, m
, usec
);
2065 r
= bus_remarshal_message(bus
, &m
);
2069 if (slot
|| callback
) {
2070 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2074 s
->reply_callback
.callback
= callback
;
2076 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2077 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2079 s
->reply_callback
.cookie
= 0;
2083 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2084 if (s
->reply_callback
.timeout_usec
!= 0) {
2085 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2087 s
->reply_callback
.timeout_usec
= 0;
2093 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2104 int bus_ensure_running(sd_bus
*bus
) {
2109 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2111 if (bus
->state
== BUS_RUNNING
)
2115 r
= sd_bus_process(bus
, NULL
);
2118 if (bus
->state
== BUS_RUNNING
)
2123 r
= sd_bus_wait(bus
, (uint64_t) -1);
2129 _public_
int sd_bus_call(
2133 sd_bus_error
*error
,
2134 sd_bus_message
**reply
) {
2136 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2142 bus_assert_return(m
, -EINVAL
, error
);
2143 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2144 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2145 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2150 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2152 if (!BUS_IS_OPEN(bus
->state
)) {
2157 r
= bus_ensure_running(bus
);
2161 i
= bus
->rqueue_size
;
2163 r
= bus_seal_message(bus
, m
, usec
);
2167 r
= bus_remarshal_message(bus
, &m
);
2171 r
= sd_bus_send(bus
, m
, &cookie
);
2175 timeout
= calc_elapse(bus
, m
->timeout
);
2180 while (i
< bus
->rqueue_size
) {
2181 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2183 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2185 if (incoming
->reply_cookie
== cookie
) {
2186 /* Found a match! */
2188 rqueue_drop_one(bus
, i
);
2189 log_debug_bus_message(incoming
);
2191 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2193 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2195 *reply
= TAKE_PTR(incoming
);
2200 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2202 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2203 return sd_bus_error_copy(error
, &incoming
->error
);
2209 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2212 streq(bus
->unique_name
, incoming
->sender
)) {
2214 rqueue_drop_one(bus
, i
);
2216 /* Our own message? Somebody is trying to send its own client a message,
2217 * let's not dead-lock, let's fail immediately. */
2223 /* Try to read more, right-away */
2227 r
= bus_read_message(bus
, false, 0);
2229 if (ERRNO_IS_DISCONNECT(r
)) {
2230 bus_enter_closing(bus
);
2242 n
= now(CLOCK_MONOTONIC
);
2250 left
= (uint64_t) -1;
2252 r
= bus_poll(bus
, true, left
);
2260 r
= dispatch_wqueue(bus
);
2262 if (ERRNO_IS_DISCONNECT(r
)) {
2263 bus_enter_closing(bus
);
2272 return sd_bus_error_set_errno(error
, r
);
2275 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2277 assert_return(bus
, -EINVAL
);
2278 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2279 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2280 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2282 if (bus
->state
== BUS_CLOSED
)
2285 if (bus
->inotify_fd
>= 0)
2286 return bus
->inotify_fd
;
2288 if (bus
->input_fd
>= 0)
2289 return bus
->input_fd
;
2294 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2297 assert_return(bus
, -EINVAL
);
2298 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2299 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2301 switch (bus
->state
) {
2307 case BUS_WATCH_BIND
:
2315 case BUS_AUTHENTICATING
:
2316 if (bus_socket_auth_needs_write(bus
))
2324 if (bus
->rqueue_size
<= 0)
2326 if (bus
->wqueue_size
> 0)
2334 assert_not_reached("Unknown state");
2340 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2341 struct reply_callback
*c
;
2343 assert_return(bus
, -EINVAL
);
2344 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2345 assert_return(timeout_usec
, -EINVAL
);
2346 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2348 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2351 if (bus
->track_queue
) {
2356 switch (bus
->state
) {
2358 case BUS_AUTHENTICATING
:
2359 *timeout_usec
= bus
->auth_timeout
;
2364 if (bus
->rqueue_size
> 0) {
2369 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2371 *timeout_usec
= (uint64_t) -1;
2375 if (c
->timeout_usec
== 0) {
2376 *timeout_usec
= (uint64_t) -1;
2380 *timeout_usec
= c
->timeout_usec
;
2387 case BUS_WATCH_BIND
:
2389 *timeout_usec
= (uint64_t) -1;
2393 assert_not_reached("Unknown or unexpected stat");
2397 static int process_timeout(sd_bus
*bus
) {
2398 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2399 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2400 struct reply_callback
*c
;
2407 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2409 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2413 n
= now(CLOCK_MONOTONIC
);
2414 if (c
->timeout_usec
> n
)
2417 r
= bus_message_new_synthetic_error(
2420 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2425 r
= bus_seal_synthetic_message(bus
, m
);
2429 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2430 c
->timeout_usec
= 0;
2432 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2435 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2437 bus
->iteration_counter
++;
2439 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2441 bus
->current_message
= m
;
2442 bus
->current_slot
= sd_bus_slot_ref(slot
);
2443 bus
->current_handler
= c
->callback
;
2444 bus
->current_userdata
= slot
->userdata
;
2445 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2446 bus
->current_userdata
= NULL
;
2447 bus
->current_handler
= NULL
;
2448 bus
->current_slot
= NULL
;
2449 bus
->current_message
= NULL
;
2452 bus_slot_disconnect(slot
, true);
2454 sd_bus_slot_unref(slot
);
2456 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2457 * and ignore the callback handler's return value. */
2461 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2464 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2468 if (bus
->state
!= BUS_HELLO
)
2471 /* Let's make sure the first message on the bus is the HELLO
2472 * reply. But note that we don't actually parse the message
2473 * here (we leave that to the usual handling), we just verify
2474 * we don't let any earlier msg through. */
2476 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2479 if (m
->reply_cookie
!= 1)
2485 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2486 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2487 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2488 struct reply_callback
*c
;
2496 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2499 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2502 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2508 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2510 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2512 /* If the reply contained a file descriptor which we
2513 * didn't want we pass an error instead. */
2515 r
= bus_message_new_synthetic_error(
2518 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2523 /* Copy over original timestamp */
2524 synthetic_reply
->realtime
= m
->realtime
;
2525 synthetic_reply
->monotonic
= m
->monotonic
;
2526 synthetic_reply
->seqnum
= m
->seqnum
;
2528 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2532 m
= synthetic_reply
;
2534 r
= sd_bus_message_rewind(m
, true);
2539 if (c
->timeout_usec
!= 0) {
2540 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2541 c
->timeout_usec
= 0;
2544 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2546 bus
->current_slot
= sd_bus_slot_ref(slot
);
2547 bus
->current_handler
= c
->callback
;
2548 bus
->current_userdata
= slot
->userdata
;
2549 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2550 bus
->current_userdata
= NULL
;
2551 bus
->current_handler
= NULL
;
2552 bus
->current_slot
= NULL
;
2555 bus_slot_disconnect(slot
, true);
2557 sd_bus_slot_unref(slot
);
2559 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2560 * ignore the callback handler's return value. */
2564 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2567 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2568 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2569 struct filter_callback
*l
;
2576 bus
->filter_callbacks_modified
= false;
2578 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2581 if (bus
->filter_callbacks_modified
)
2584 /* Don't run this more than once per iteration */
2585 if (l
->last_iteration
== bus
->iteration_counter
)
2588 l
->last_iteration
= bus
->iteration_counter
;
2590 r
= sd_bus_message_rewind(m
, true);
2594 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2596 bus
->current_slot
= sd_bus_slot_ref(slot
);
2597 bus
->current_handler
= l
->callback
;
2598 bus
->current_userdata
= slot
->userdata
;
2599 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2600 bus
->current_userdata
= NULL
;
2601 bus
->current_handler
= NULL
;
2602 bus
->current_slot
= sd_bus_slot_unref(slot
);
2604 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2610 } while (bus
->filter_callbacks_modified
);
2615 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2622 bus
->match_callbacks_modified
= false;
2624 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2628 } while (bus
->match_callbacks_modified
);
2633 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2634 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2640 if (bus
->is_monitor
)
2643 if (bus
->manual_peer_interface
)
2646 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2649 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2652 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2655 if (streq_ptr(m
->member
, "Ping"))
2656 r
= sd_bus_message_new_method_return(m
, &reply
);
2657 else if (streq_ptr(m
->member
, "GetMachineId")) {
2661 r
= sd_id128_get_machine(&id
);
2665 r
= sd_bus_message_new_method_return(m
, &reply
);
2669 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2671 r
= sd_bus_message_new_method_errorf(
2673 SD_BUS_ERROR_UNKNOWN_METHOD
,
2674 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2679 r
= sd_bus_send(bus
, reply
, NULL
);
2686 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2690 /* If we got a message with a file descriptor which we didn't
2691 * want to accept, then let's drop it. How can this even
2692 * happen? For example, when the kernel queues a message into
2693 * an activatable names's queue which allows fds, and then is
2694 * delivered to us later even though we ourselves did not
2697 if (bus
->is_monitor
)
2706 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2707 return 1; /* just eat it up */
2709 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2712 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2718 bus
->current_message
= m
;
2719 bus
->iteration_counter
++;
2721 log_debug_bus_message(m
);
2723 r
= process_hello(bus
, m
);
2727 r
= process_reply(bus
, m
);
2731 r
= process_fd_check(bus
, m
);
2735 r
= process_filter(bus
, m
);
2739 r
= process_match(bus
, m
);
2743 r
= process_builtin(bus
, m
);
2747 r
= bus_process_object(bus
, m
);
2750 bus
->current_message
= NULL
;
2754 static int dispatch_track(sd_bus
*bus
) {
2757 if (!bus
->track_queue
)
2760 bus_track_dispatch(bus
->track_queue
);
2764 static int process_running(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2765 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2769 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2771 r
= process_timeout(bus
);
2775 r
= dispatch_wqueue(bus
);
2779 r
= dispatch_track(bus
);
2783 r
= dispatch_rqueue(bus
, hint_priority
, priority
, &m
);
2789 r
= process_message(bus
, m
);
2794 r
= sd_bus_message_rewind(m
, true);
2802 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2804 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2805 strna(sd_bus_message_get_sender(m
)),
2806 strna(sd_bus_message_get_path(m
)),
2807 strna(sd_bus_message_get_interface(m
)),
2808 strna(sd_bus_message_get_member(m
)));
2810 r
= sd_bus_reply_method_errorf(
2812 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2813 "Unknown object '%s'.", m
->path
);
2827 static int bus_exit_now(sd_bus
*bus
) {
2830 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2831 * sd_event_exit(), otherwise invokes libc exit(). */
2833 if (bus
->exited
) /* did we already exit? */
2835 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2837 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2840 bus
->exited
= true; /* never exit more than once */
2842 log_debug("Bus connection disconnected, exiting.");
2845 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2849 assert_not_reached("exit() didn't exit?");
2852 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2853 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2854 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2861 r
= bus_message_new_synthetic_error(
2864 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2869 r
= bus_seal_synthetic_message(bus
, m
);
2873 if (c
->timeout_usec
!= 0) {
2874 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2875 c
->timeout_usec
= 0;
2878 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2881 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2883 bus
->iteration_counter
++;
2885 bus
->current_message
= m
;
2886 bus
->current_slot
= sd_bus_slot_ref(slot
);
2887 bus
->current_handler
= c
->callback
;
2888 bus
->current_userdata
= slot
->userdata
;
2889 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2890 bus
->current_userdata
= NULL
;
2891 bus
->current_handler
= NULL
;
2892 bus
->current_slot
= NULL
;
2893 bus
->current_message
= NULL
;
2896 bus_slot_disconnect(slot
, true);
2898 sd_bus_slot_unref(slot
);
2900 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2903 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2904 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2905 struct reply_callback
*c
;
2909 assert(bus
->state
== BUS_CLOSING
);
2911 /* First, fail all outstanding method calls */
2912 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2914 return process_closing_reply_callback(bus
, c
);
2916 /* Then, fake-drop all remaining bus tracking references */
2918 bus_track_close(bus
->tracks
);
2922 /* Then, synthesize a Disconnected message */
2923 r
= sd_bus_message_new_signal(
2926 "/org/freedesktop/DBus/Local",
2927 "org.freedesktop.DBus.Local",
2932 bus_message_set_sender_local(bus
, m
);
2934 r
= bus_seal_synthetic_message(bus
, m
);
2940 bus
->current_message
= m
;
2941 bus
->iteration_counter
++;
2943 r
= process_filter(bus
, m
);
2947 r
= process_match(bus
, m
);
2951 /* Nothing else to do, exit now, if the condition holds */
2952 bus
->exit_triggered
= true;
2953 (void) bus_exit_now(bus
);
2961 bus
->current_message
= NULL
;
2966 static int bus_process_internal(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2969 /* Returns 0 when we didn't do anything. This should cause the
2970 * caller to invoke sd_bus_wait() before returning the next
2971 * time. Returns > 0 when we did something, which possibly
2972 * means *ret is filled in with an unprocessed message. */
2974 assert_return(bus
, -EINVAL
);
2975 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2976 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2978 /* We don't allow recursively invoking sd_bus_process(). */
2979 assert_return(!bus
->current_message
, -EBUSY
);
2980 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
2982 BUS_DONT_DESTROY(bus
);
2984 switch (bus
->state
) {
2992 case BUS_WATCH_BIND
:
2993 r
= bus_socket_process_watch_bind(bus
);
2997 r
= bus_socket_process_opening(bus
);
3000 case BUS_AUTHENTICATING
:
3001 r
= bus_socket_process_authenticating(bus
);
3006 r
= process_running(bus
, hint_priority
, priority
, ret
);
3010 /* This branch initializes *ret, hence we don't use the generic error checking below */
3014 return process_closing(bus
, ret
);
3017 assert_not_reached("Unknown state");
3020 if (ERRNO_IS_DISCONNECT(r
)) {
3021 bus_enter_closing(bus
);
3032 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3033 return bus_process_internal(bus
, false, 0, ret
);
3036 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3037 return bus_process_internal(bus
, true, priority
, ret
);
3040 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3041 struct pollfd p
[2] = {};
3044 usec_t m
= USEC_INFINITY
;
3048 if (bus
->state
== BUS_CLOSING
)
3051 if (!BUS_IS_OPEN(bus
->state
))
3054 if (bus
->state
== BUS_WATCH_BIND
) {
3055 assert(bus
->inotify_fd
>= 0);
3057 p
[0].events
= POLLIN
;
3058 p
[0].fd
= bus
->inotify_fd
;
3063 e
= sd_bus_get_events(bus
);
3068 /* The caller really needs some more data, he doesn't
3069 * care about what's already read, or any timeouts
3070 * except its own. */
3074 /* The caller wants to process if there's something to
3075 * process, but doesn't care otherwise */
3077 r
= sd_bus_get_timeout(bus
, &until
);
3081 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3084 p
[0].fd
= bus
->input_fd
;
3085 if (bus
->output_fd
== bus
->input_fd
) {
3089 p
[0].events
= e
& POLLIN
;
3090 p
[1].fd
= bus
->output_fd
;
3091 p
[1].events
= e
& POLLOUT
;
3096 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3099 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3103 return r
> 0 ? 1 : 0;
3106 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3108 assert_return(bus
, -EINVAL
);
3109 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3110 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3112 if (bus
->state
== BUS_CLOSING
)
3115 if (!BUS_IS_OPEN(bus
->state
))
3118 if (bus
->rqueue_size
> 0)
3121 return bus_poll(bus
, false, timeout_usec
);
3124 _public_
int sd_bus_flush(sd_bus
*bus
) {
3127 assert_return(bus
, -EINVAL
);
3128 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3129 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3131 if (bus
->state
== BUS_CLOSING
)
3134 if (!BUS_IS_OPEN(bus
->state
))
3137 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3138 if (bus
->state
== BUS_WATCH_BIND
)
3141 r
= bus_ensure_running(bus
);
3145 if (bus
->wqueue_size
<= 0)
3149 r
= dispatch_wqueue(bus
);
3151 if (ERRNO_IS_DISCONNECT(r
)) {
3152 bus_enter_closing(bus
);
3159 if (bus
->wqueue_size
<= 0)
3162 r
= bus_poll(bus
, false, (uint64_t) -1);
3168 _public_
int sd_bus_add_filter(
3171 sd_bus_message_handler_t callback
,
3176 assert_return(bus
, -EINVAL
);
3177 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3178 assert_return(callback
, -EINVAL
);
3179 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3181 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3185 s
->filter_callback
.callback
= callback
;
3187 bus
->filter_callbacks_modified
= true;
3188 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3196 static int add_match_callback(
3199 sd_bus_error
*ret_error
) {
3201 sd_bus_slot
*match_slot
= userdata
;
3202 bool failed
= false;
3208 sd_bus_slot_ref(match_slot
);
3210 if (sd_bus_message_is_method_error(m
, NULL
)) {
3211 log_debug_errno(sd_bus_message_get_errno(m
),
3212 "Unable to add match %s, failing connection: %s",
3213 match_slot
->match_callback
.match_string
,
3214 sd_bus_message_get_error(m
)->message
);
3218 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3220 if (match_slot
->match_callback
.install_callback
) {
3223 bus
= sd_bus_message_get_bus(m
);
3225 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3226 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3229 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3230 assert(bus
->current_handler
== add_match_callback
);
3231 assert(bus
->current_userdata
== userdata
);
3233 bus
->current_slot
= match_slot
;
3234 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3235 bus
->current_userdata
= match_slot
->userdata
;
3237 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3239 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3240 bus
->current_handler
= add_match_callback
;
3241 bus
->current_userdata
= userdata
;
3243 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3245 if (failed
) /* Generic failure handling: destroy the connection */
3246 bus_enter_closing(sd_bus_message_get_bus(m
));
3251 if (failed
&& match_slot
->floating
)
3252 bus_slot_disconnect(match_slot
, true);
3254 sd_bus_slot_unref(match_slot
);
3259 static int bus_add_match_full(
3264 sd_bus_message_handler_t callback
,
3265 sd_bus_message_handler_t install_callback
,
3268 struct bus_match_component
*components
= NULL
;
3269 unsigned n_components
= 0;
3270 sd_bus_slot
*s
= NULL
;
3273 assert_return(bus
, -EINVAL
);
3274 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3275 assert_return(match
, -EINVAL
);
3276 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3278 r
= bus_match_parse(match
, &components
, &n_components
);
3282 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3288 s
->match_callback
.callback
= callback
;
3289 s
->match_callback
.install_callback
= install_callback
;
3291 if (bus
->bus_client
) {
3292 enum bus_match_scope scope
;
3294 scope
= bus_match_get_scope(components
, n_components
);
3296 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3297 if (scope
!= BUS_MATCH_LOCAL
) {
3299 /* We store the original match string, so that we can use it to remove the match again. */
3301 s
->match_callback
.match_string
= strdup(match
);
3302 if (!s
->match_callback
.match_string
) {
3308 r
= bus_add_match_internal_async(bus
,
3309 &s
->match_callback
.install_slot
,
3310 s
->match_callback
.match_string
,
3317 /* Make the slot of the match call floating now. We need the reference, but we don't
3318 * want that this match pins the bus object, hence we first create it non-floating, but
3319 * then make it floating. */
3320 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3322 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
);
3326 s
->match_added
= true;
3330 bus
->match_callbacks_modified
= true;
3331 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3340 bus_match_parse_free(components
, n_components
);
3341 sd_bus_slot_unref(s
);
3346 _public_
int sd_bus_add_match(
3350 sd_bus_message_handler_t callback
,
3353 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3356 _public_
int sd_bus_add_match_async(
3360 sd_bus_message_handler_t callback
,
3361 sd_bus_message_handler_t install_callback
,
3364 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3367 bool bus_pid_changed(sd_bus
*bus
) {
3370 /* We don't support people creating a bus connection and
3371 * keeping it around over a fork(). Let's complain. */
3373 return bus
->original_pid
!= getpid_cached();
3376 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3377 sd_bus
*bus
= userdata
;
3382 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3384 r
= sd_bus_process(bus
, NULL
);
3386 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3387 bus_enter_closing(bus
);
3393 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3394 sd_bus
*bus
= userdata
;
3399 r
= sd_bus_process(bus
, NULL
);
3401 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3402 bus_enter_closing(bus
);
3408 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3409 sd_bus
*bus
= userdata
;
3416 e
= sd_bus_get_events(bus
);
3422 if (bus
->output_fd
!= bus
->input_fd
) {
3424 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3428 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3430 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3434 r
= sd_bus_get_timeout(bus
, &until
);
3440 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3447 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3454 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3455 bus_enter_closing(bus
);
3460 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3461 sd_bus
*bus
= userdata
;
3465 if (bus
->close_on_exit
) {
3473 int bus_attach_io_events(sd_bus
*bus
) {
3478 if (bus
->input_fd
< 0)
3484 if (!bus
->input_io_event_source
) {
3485 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3489 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3493 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3497 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3499 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3504 if (bus
->output_fd
!= bus
->input_fd
) {
3505 assert(bus
->output_fd
>= 0);
3507 if (!bus
->output_io_event_source
) {
3508 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3512 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3516 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3518 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3527 static void bus_detach_io_events(sd_bus
*bus
) {
3530 if (bus
->input_io_event_source
) {
3531 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3532 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3535 if (bus
->output_io_event_source
) {
3536 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3537 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3541 int bus_attach_inotify_event(sd_bus
*bus
) {
3546 if (bus
->inotify_fd
< 0)
3552 if (!bus
->inotify_event_source
) {
3553 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3557 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3561 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3563 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3570 static void bus_detach_inotify_event(sd_bus
*bus
) {
3573 if (bus
->inotify_event_source
) {
3574 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3575 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3579 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3582 assert_return(bus
, -EINVAL
);
3583 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3584 assert_return(!bus
->event
, -EBUSY
);
3586 assert(!bus
->input_io_event_source
);
3587 assert(!bus
->output_io_event_source
);
3588 assert(!bus
->time_event_source
);
3591 bus
->event
= sd_event_ref(event
);
3593 r
= sd_event_default(&bus
->event
);
3598 bus
->event_priority
= priority
;
3600 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3604 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3608 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3612 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3616 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3620 r
= bus_attach_io_events(bus
);
3624 r
= bus_attach_inotify_event(bus
);
3631 sd_bus_detach_event(bus
);
3635 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3636 assert_return(bus
, -EINVAL
);
3637 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3642 bus_detach_io_events(bus
);
3643 bus_detach_inotify_event(bus
);
3645 if (bus
->time_event_source
) {
3646 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3647 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3650 if (bus
->quit_event_source
) {
3651 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3652 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3655 bus
->event
= sd_event_unref(bus
->event
);
3659 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3660 assert_return(bus
, NULL
);
3665 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3666 assert_return(bus
, NULL
);
3668 return bus
->current_message
;
3671 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3672 assert_return(bus
, NULL
);
3674 return bus
->current_slot
;
3677 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3678 assert_return(bus
, NULL
);
3680 return bus
->current_handler
;
3683 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3684 assert_return(bus
, NULL
);
3686 return bus
->current_userdata
;
3689 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3694 assert(default_bus
);
3697 return !!*default_bus
;
3700 *ret
= sd_bus_ref(*default_bus
);
3708 b
->default_bus_ptr
= default_bus
;
3716 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3717 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3720 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3721 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3724 _public_
int sd_bus_default(sd_bus
**ret
) {
3725 int (*bus_open
)(sd_bus
**) = NULL
;
3728 busp
= bus_choose_default(&bus_open
);
3729 return bus_default(bus_open
, busp
, ret
);
3732 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3733 assert_return(b
, -EINVAL
);
3734 assert_return(tid
, -EINVAL
);
3735 assert_return(!bus_pid_changed(b
), -ECHILD
);
3743 return sd_event_get_tid(b
->event
, tid
);
3748 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3749 _cleanup_free_
char *e
= NULL
;
3752 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3753 assert_return(external_id
, -EINVAL
);
3754 assert_return(ret_path
, -EINVAL
);
3756 e
= bus_label_escape(external_id
);
3760 ret
= path_join(prefix
, e
);
3768 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3772 assert_return(object_path_is_valid(path
), -EINVAL
);
3773 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3774 assert_return(external_id
, -EINVAL
);
3776 e
= object_path_startswith(path
, prefix
);
3778 *external_id
= NULL
;
3782 ret
= bus_label_unescape(e
);
3790 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3791 _cleanup_strv_free_
char **labels
= NULL
;
3792 char *path
, *path_pos
, **label_pos
;
3793 const char *sep
, *template_pos
;
3798 assert_return(out
, -EINVAL
);
3799 assert_return(path_template
, -EINVAL
);
3801 path_length
= strlen(path_template
);
3803 va_start(list
, path_template
);
3804 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3808 arg
= va_arg(list
, const char *);
3814 label
= bus_label_escape(arg
);
3820 r
= strv_consume(&labels
, label
);
3826 /* add label length, but account for the format character */
3827 path_length
+= strlen(label
) - 1;
3831 path
= malloc(path_length
+ 1);
3838 for (template_pos
= path_template
; *template_pos
; ) {
3839 sep
= strchrnul(template_pos
, '%');
3840 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3844 path_pos
= stpcpy(path_pos
, *label_pos
++);
3845 template_pos
= sep
+ 1;
3853 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3854 _cleanup_strv_free_
char **labels
= NULL
;
3855 const char *template_pos
, *path_pos
;
3861 * This decodes an object-path based on a template argument. The
3862 * template consists of a verbatim path, optionally including special
3865 * - Each occurrence of '%' in the template matches an arbitrary
3866 * substring of a label in the given path. At most one such
3867 * directive is allowed per label. For each such directive, the
3868 * caller must provide an output parameter (char **) via va_arg. If
3869 * NULL is passed, the given label is verified, but not returned.
3870 * For each matched label, the *decoded* label is stored in the
3871 * passed output argument, and the caller is responsible to free
3872 * it. Note that the output arguments are only modified if the
3873 * actually path matched the template. Otherwise, they're left
3876 * This function returns <0 on error, 0 if the path does not match the
3877 * template, 1 if it matched.
3880 assert_return(path
, -EINVAL
);
3881 assert_return(path_template
, -EINVAL
);
3885 for (template_pos
= path_template
; *template_pos
; ) {
3890 /* verify everything until the next '%' matches verbatim */
3891 sep
= strchrnul(template_pos
, '%');
3892 length
= sep
- template_pos
;
3893 if (strncmp(path_pos
, template_pos
, length
))
3897 template_pos
+= length
;
3902 /* We found the next '%' character. Everything up until here
3903 * matched. We now skip ahead to the end of this label and make
3904 * sure it matches the tail of the label in the path. Then we
3905 * decode the string in-between and save it for later use. */
3907 ++template_pos
; /* skip over '%' */
3909 sep
= strchrnul(template_pos
, '/');
3910 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3912 /* verify the suffixes match */
3913 sep
= strchrnul(path_pos
, '/');
3914 if (sep
- path_pos
< (ssize_t
)length
||
3915 strncmp(sep
- length
, template_pos
, length
))
3918 template_pos
+= length
; /* skip over matched label */
3919 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3921 /* store unescaped label for later use */
3922 label
= bus_label_unescape_n(path_pos
, length
);
3926 r
= strv_consume(&labels
, label
);
3930 path_pos
= sep
; /* skip decoded label and suffix */
3933 /* end of template must match end of path */
3937 /* copy the labels over to the caller */
3938 va_start(list
, path_template
);
3939 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3942 arg
= va_arg(list
, char **);
3950 labels
= mfree(labels
);
3954 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3955 assert_return(bus
, -EINVAL
);
3956 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3957 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3962 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3963 assert_return(bus
, -EINVAL
);
3964 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3965 assert_return(description
, -EINVAL
);
3966 assert_return(bus
->description
, -ENXIO
);
3967 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3969 if (bus
->description
)
3970 *description
= bus
->description
;
3971 else if (bus
->is_system
)
3972 *description
= "system";
3973 else if (bus
->is_user
)
3974 *description
= "user";
3976 *description
= NULL
;
3981 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
3982 assert_return(bus
, -EINVAL
);
3983 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3984 assert_return(scope
, -EINVAL
);
3985 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3992 if (bus
->is_system
) {
4000 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4002 assert_return(bus
, -EINVAL
);
4003 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4004 assert_return(address
, -EINVAL
);
4005 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4008 *address
= bus
->address
;
4015 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4016 assert_return(bus
, -EINVAL
);
4017 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4018 assert_return(mask
, -EINVAL
);
4019 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4021 *mask
= bus
->creds_mask
;
4025 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4026 assert_return(bus
, -EINVAL
);
4027 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4028 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4030 return bus
->bus_client
;
4033 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4034 assert_return(bus
, -EINVAL
);
4035 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4036 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4038 return bus
->is_server
;
4041 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4042 assert_return(bus
, -EINVAL
);
4043 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4044 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4046 return bus
->anonymous_auth
;
4049 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4050 assert_return(bus
, -EINVAL
);
4051 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4052 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4054 return bus
->trusted
;
4057 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4058 assert_return(bus
, -EINVAL
);
4059 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4060 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4062 return bus
->is_monitor
;
4065 static void flush_close(sd_bus
*bus
) {
4069 /* Flushes and closes the specified bus. We take a ref before,
4070 * to ensure the flushing does not cause the bus to be
4073 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4076 _public_
void sd_bus_default_flush_close(void) {
4077 flush_close(default_starter_bus
);
4078 flush_close(default_user_bus
);
4079 flush_close(default_system_bus
);
4082 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4083 assert_return(bus
, -EINVAL
);
4084 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4086 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4087 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4088 * from the client side. */
4089 bus
->exit_on_disconnect
= b
;
4091 /* If the exit condition was triggered already, exit immediately. */
4092 return bus_exit_now(bus
);
4095 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4096 assert_return(bus
, -EINVAL
);
4097 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4099 return bus
->exit_on_disconnect
;
4102 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4103 assert_return(bus
, -EINVAL
);
4104 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4105 assert_return(!bus
->bus_client
, -EPERM
);
4106 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4108 return free_and_strdup(&bus
->patch_sender
, sender
);
4111 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4112 assert_return(bus
, -EINVAL
);
4113 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4114 assert_return(ret
, -EINVAL
);
4116 if (!bus
->patch_sender
)
4119 *ret
= bus
->patch_sender
;
4123 _public_
int sd_bus_get_n_queued_read(sd_bus
*bus
, uint64_t *ret
) {
4124 assert_return(bus
, -EINVAL
);
4125 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4126 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4127 assert_return(ret
, -EINVAL
);
4129 *ret
= bus
->rqueue_size
;
4133 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4134 assert_return(bus
, -EINVAL
);
4135 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4136 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4137 assert_return(ret
, -EINVAL
);
4139 *ret
= bus
->wqueue_size
;
4143 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4144 assert_return(bus
, -EINVAL
);
4145 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4147 bus
->method_call_timeout
= usec
;
4151 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4155 assert_return(bus
, -EINVAL
);
4156 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4157 assert_return(ret
, -EINVAL
);
4159 if (bus
->method_call_timeout
!= 0) {
4160 *ret
= bus
->method_call_timeout
;
4164 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4165 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4166 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4167 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4168 *ret
= bus
->method_call_timeout
= usec
;
4172 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4176 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4177 assert_return(bus
, -EINVAL
);
4178 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4180 bus
->close_on_exit
= b
;
4184 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4185 assert_return(bus
, -EINVAL
);
4186 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4188 return bus
->close_on_exit
;