1 /* SPDX-License-Identifier: LGPL-2.1+ */
16 #include "alloc-util.h"
17 #include "bus-container.h"
18 #include "bus-control.h"
19 #include "bus-internal.h"
20 #include "bus-kernel.h"
21 #include "bus-label.h"
22 #include "bus-message.h"
23 #include "bus-objects.h"
24 #include "bus-protocol.h"
26 #include "bus-socket.h"
27 #include "bus-track.h"
30 #include "cgroup-util.h"
32 #include "errno-util.h"
34 #include "hexdecoct.h"
35 #include "hostname-util.h"
37 #include "memory-util.h"
38 #include "missing_syscall.h"
39 #include "parse-util.h"
40 #include "path-util.h"
41 #include "process-util.h"
42 #include "string-util.h"
45 #define log_debug_bus_message(m) \
47 sd_bus_message *_mm = (m); \
48 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", \
49 bus_message_type_to_string(_mm->header->type), \
50 strna(sd_bus_message_get_sender(_mm)), \
51 strna(sd_bus_message_get_destination(_mm)), \
52 strna(sd_bus_message_get_path(_mm)), \
53 strna(sd_bus_message_get_interface(_mm)), \
54 strna(sd_bus_message_get_member(_mm)), \
55 BUS_MESSAGE_COOKIE(_mm), \
57 strna(_mm->root_container.signature), \
58 strna(_mm->error.name), \
59 strna(_mm->error.message)); \
62 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
);
63 static void bus_detach_io_events(sd_bus
*b
);
64 static void bus_detach_inotify_event(sd_bus
*b
);
66 static thread_local sd_bus
*default_system_bus
= NULL
;
67 static thread_local sd_bus
*default_user_bus
= NULL
;
68 static thread_local sd_bus
*default_starter_bus
= NULL
;
70 static sd_bus
**bus_choose_default(int (**bus_open
)(sd_bus
**)) {
73 /* Let's try our best to reuse another cached connection. If
74 * the starter bus type is set, connect via our normal
75 * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
76 * we can share the connection with the user/system default
79 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
81 if (streq(e
, "system")) {
83 *bus_open
= sd_bus_open_system
;
84 return &default_system_bus
;
85 } else if (STR_IN_SET(e
, "user", "session")) {
87 *bus_open
= sd_bus_open_user
;
88 return &default_user_bus
;
92 /* No type is specified, so we have not other option than to
93 * use the starter address if it is set. */
94 e
= secure_getenv("DBUS_STARTER_ADDRESS");
97 *bus_open
= sd_bus_open
;
98 return &default_starter_bus
;
101 /* Finally, if nothing is set use the cached connection for
104 if (cg_pid_get_owner_uid(0, NULL
) >= 0) {
106 *bus_open
= sd_bus_open_user
;
107 return &default_user_bus
;
110 *bus_open
= sd_bus_open_system
;
111 return &default_system_bus
;
115 sd_bus
*bus_resolve(sd_bus
*bus
) {
116 switch ((uintptr_t) bus
) {
117 case (uintptr_t) SD_BUS_DEFAULT
:
118 return *(bus_choose_default(NULL
));
119 case (uintptr_t) SD_BUS_DEFAULT_USER
:
120 return default_user_bus
;
121 case (uintptr_t) SD_BUS_DEFAULT_SYSTEM
:
122 return default_system_bus
;
128 void bus_close_io_fds(sd_bus
*b
) {
131 bus_detach_io_events(b
);
133 if (b
->input_fd
!= b
->output_fd
)
134 safe_close(b
->output_fd
);
135 b
->output_fd
= b
->input_fd
= safe_close(b
->input_fd
);
138 void bus_close_inotify_fd(sd_bus
*b
) {
141 bus_detach_inotify_event(b
);
143 b
->inotify_fd
= safe_close(b
->inotify_fd
);
144 b
->inotify_watches
= mfree(b
->inotify_watches
);
145 b
->n_inotify_watches
= 0;
148 static void bus_reset_queues(sd_bus
*b
) {
151 while (b
->rqueue_size
> 0)
152 bus_message_unref_queued(b
->rqueue
[--b
->rqueue_size
], b
);
154 b
->rqueue
= mfree(b
->rqueue
);
155 b
->rqueue_allocated
= 0;
157 while (b
->wqueue_size
> 0)
158 bus_message_unref_queued(b
->wqueue
[--b
->wqueue_size
], b
);
160 b
->wqueue
= mfree(b
->wqueue
);
161 b
->wqueue_allocated
= 0;
164 static sd_bus
* bus_free(sd_bus
*b
) {
168 assert(!b
->track_queue
);
171 b
->state
= BUS_CLOSED
;
173 sd_bus_detach_event(b
);
175 while ((s
= b
->slots
)) {
176 /* At this point only floating slots can still be
177 * around, because the non-floating ones keep a
178 * reference to the bus, and we thus couldn't be
179 * destructing right now... We forcibly disconnect the
180 * slots here, so that they still can be referenced by
181 * apps, but are dead. */
184 bus_slot_disconnect(s
, true);
187 if (b
->default_bus_ptr
)
188 *b
->default_bus_ptr
= NULL
;
191 bus_close_inotify_fd(b
);
196 free(b
->unique_name
);
197 free(b
->auth_buffer
);
200 free(b
->description
);
201 free(b
->patch_sender
);
204 strv_free(b
->exec_argv
);
206 close_many(b
->fds
, b
->n_fds
);
211 ordered_hashmap_free_free(b
->reply_callbacks
);
212 prioq_free(b
->reply_callbacks_prioq
);
214 assert(b
->match_callbacks
.type
== BUS_MATCH_ROOT
);
215 bus_match_free(&b
->match_callbacks
);
217 hashmap_free_free(b
->vtable_methods
);
218 hashmap_free_free(b
->vtable_properties
);
220 assert(hashmap_isempty(b
->nodes
));
221 hashmap_free(b
->nodes
);
225 assert_se(pthread_mutex_destroy(&b
->memfd_cache_mutex
) == 0);
230 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus
*, bus_free
);
232 _public_
int sd_bus_new(sd_bus
**ret
) {
233 _cleanup_free_ sd_bus
*b
= NULL
;
235 assert_return(ret
, -EINVAL
);
246 .message_version
= 1,
247 .creds_mask
= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
,
249 .original_pid
= getpid_cached(),
250 .n_groups
= (size_t) -1,
251 .close_on_exit
= true,
254 /* We guarantee that wqueue always has space for at least one entry */
255 if (!GREEDY_REALLOC(b
->wqueue
, b
->wqueue_allocated
, 1))
258 assert_se(pthread_mutex_init(&b
->memfd_cache_mutex
, NULL
) == 0);
264 _public_
int sd_bus_set_address(sd_bus
*bus
, const char *address
) {
265 assert_return(bus
, -EINVAL
);
266 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
267 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
268 assert_return(address
, -EINVAL
);
269 assert_return(!bus_pid_changed(bus
), -ECHILD
);
271 return free_and_strdup(&bus
->address
, address
);
274 _public_
int sd_bus_set_fd(sd_bus
*bus
, int input_fd
, int output_fd
) {
275 assert_return(bus
, -EINVAL
);
276 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
277 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
278 assert_return(input_fd
>= 0, -EBADF
);
279 assert_return(output_fd
>= 0, -EBADF
);
280 assert_return(!bus_pid_changed(bus
), -ECHILD
);
282 bus
->input_fd
= input_fd
;
283 bus
->output_fd
= output_fd
;
287 _public_
int sd_bus_set_exec(sd_bus
*bus
, const char *path
, char *const *argv
) {
288 _cleanup_strv_free_
char **a
= NULL
;
291 assert_return(bus
, -EINVAL
);
292 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
293 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
294 assert_return(path
, -EINVAL
);
295 assert_return(!strv_isempty(argv
), -EINVAL
);
296 assert_return(!bus_pid_changed(bus
), -ECHILD
);
302 r
= free_and_strdup(&bus
->exec_path
, path
);
306 return strv_free_and_replace(bus
->exec_argv
, a
);
309 _public_
int sd_bus_set_bus_client(sd_bus
*bus
, int b
) {
310 assert_return(bus
, -EINVAL
);
311 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
312 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
313 assert_return(!bus
->patch_sender
, -EPERM
);
314 assert_return(!bus_pid_changed(bus
), -ECHILD
);
316 bus
->bus_client
= !!b
;
320 _public_
int sd_bus_set_monitor(sd_bus
*bus
, int b
) {
321 assert_return(bus
, -EINVAL
);
322 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
323 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
324 assert_return(!bus_pid_changed(bus
), -ECHILD
);
326 bus
->is_monitor
= !!b
;
330 _public_
int sd_bus_negotiate_fds(sd_bus
*bus
, int b
) {
331 assert_return(bus
, -EINVAL
);
332 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
333 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
334 assert_return(!bus_pid_changed(bus
), -ECHILD
);
336 bus
->accept_fd
= !!b
;
340 _public_
int sd_bus_negotiate_timestamp(sd_bus
*bus
, int b
) {
341 assert_return(bus
, -EINVAL
);
342 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
343 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
344 assert_return(!bus_pid_changed(bus
), -ECHILD
);
346 /* This is not actually supported by any of our transports these days, but we do honour it for synthetic
347 * replies, and maybe one day classic D-Bus learns this too */
348 bus
->attach_timestamp
= !!b
;
353 _public_
int sd_bus_negotiate_creds(sd_bus
*bus
, int b
, uint64_t mask
) {
354 assert_return(bus
, -EINVAL
);
355 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
356 assert_return(mask
<= _SD_BUS_CREDS_ALL
, -EINVAL
);
357 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
358 assert_return(!bus_pid_changed(bus
), -ECHILD
);
360 SET_FLAG(bus
->creds_mask
, mask
, b
);
362 /* The well knowns we need unconditionally, so that matches can work */
363 bus
->creds_mask
|= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
;
368 _public_
int sd_bus_set_server(sd_bus
*bus
, int b
, sd_id128_t server_id
) {
369 assert_return(bus
, -EINVAL
);
370 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
371 assert_return(b
|| sd_id128_equal(server_id
, SD_ID128_NULL
), -EINVAL
);
372 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
373 assert_return(!bus_pid_changed(bus
), -ECHILD
);
375 bus
->is_server
= !!b
;
376 bus
->server_id
= server_id
;
380 _public_
int sd_bus_set_anonymous(sd_bus
*bus
, int b
) {
381 assert_return(bus
, -EINVAL
);
382 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
383 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
384 assert_return(!bus_pid_changed(bus
), -ECHILD
);
386 bus
->anonymous_auth
= !!b
;
390 _public_
int sd_bus_set_trusted(sd_bus
*bus
, int b
) {
391 assert_return(bus
, -EINVAL
);
392 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
393 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
394 assert_return(!bus_pid_changed(bus
), -ECHILD
);
400 _public_
int sd_bus_set_description(sd_bus
*bus
, const char *description
) {
401 assert_return(bus
, -EINVAL
);
402 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
403 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
404 assert_return(!bus_pid_changed(bus
), -ECHILD
);
406 return free_and_strdup(&bus
->description
, description
);
409 _public_
int sd_bus_set_allow_interactive_authorization(sd_bus
*bus
, int b
) {
410 assert_return(bus
, -EINVAL
);
411 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
412 assert_return(!bus_pid_changed(bus
), -ECHILD
);
414 bus
->allow_interactive_authorization
= !!b
;
418 _public_
int sd_bus_get_allow_interactive_authorization(sd_bus
*bus
) {
419 assert_return(bus
, -EINVAL
);
420 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
421 assert_return(!bus_pid_changed(bus
), -ECHILD
);
423 return bus
->allow_interactive_authorization
;
426 _public_
int sd_bus_set_watch_bind(sd_bus
*bus
, int b
) {
427 assert_return(bus
, -EINVAL
);
428 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
429 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
430 assert_return(!bus_pid_changed(bus
), -ECHILD
);
432 bus
->watch_bind
= !!b
;
436 _public_
int sd_bus_get_watch_bind(sd_bus
*bus
) {
437 assert_return(bus
, -EINVAL
);
438 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
439 assert_return(!bus_pid_changed(bus
), -ECHILD
);
441 return bus
->watch_bind
;
444 _public_
int sd_bus_set_connected_signal(sd_bus
*bus
, int b
) {
445 assert_return(bus
, -EINVAL
);
446 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
447 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
448 assert_return(!bus_pid_changed(bus
), -ECHILD
);
450 bus
->connected_signal
= !!b
;
454 _public_
int sd_bus_get_connected_signal(sd_bus
*bus
) {
455 assert_return(bus
, -EINVAL
);
456 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
457 assert_return(!bus_pid_changed(bus
), -ECHILD
);
459 return bus
->connected_signal
;
462 static int synthesize_connected_signal(sd_bus
*bus
) {
463 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
468 /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called
469 * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the
470 * Hello() reply. Or in other words, whenever we enter BUS_RUNNING state.
472 * This is useful so that clients can start doing stuff whenever the connection is fully established in a way
473 * that works independently from whether we connected to a full bus or just a direct connection. */
475 if (!bus
->connected_signal
)
478 r
= sd_bus_message_new_signal(
481 "/org/freedesktop/DBus/Local",
482 "org.freedesktop.DBus.Local",
487 bus_message_set_sender_local(bus
, m
);
488 m
->read_counter
= ++bus
->read_counter
;
490 r
= bus_seal_synthetic_message(bus
, m
);
494 r
= bus_rqueue_make_room(bus
);
498 /* Insert at the very front */
499 memmove(bus
->rqueue
+ 1, bus
->rqueue
, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
500 bus
->rqueue
[0] = bus_message_ref_queued(m
, bus
);
506 void bus_set_state(sd_bus
*bus
, enum bus_state state
) {
507 static const char * const table
[_BUS_STATE_MAX
] = {
508 [BUS_UNSET
] = "UNSET",
509 [BUS_WATCH_BIND
] = "WATCH_BIND",
510 [BUS_OPENING
] = "OPENING",
511 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
512 [BUS_HELLO
] = "HELLO",
513 [BUS_RUNNING
] = "RUNNING",
514 [BUS_CLOSING
] = "CLOSING",
515 [BUS_CLOSED
] = "CLOSED",
519 assert(state
< _BUS_STATE_MAX
);
521 if (state
== bus
->state
)
524 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
528 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
536 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
538 r
= sd_bus_message_get_errno(reply
);
544 r
= sd_bus_message_read(reply
, "s", &s
);
548 if (!service_name_is_valid(s
) || s
[0] != ':') {
553 r
= free_and_strdup(&bus
->unique_name
, s
);
557 if (bus
->state
== BUS_HELLO
) {
558 bus_set_state(bus
, BUS_RUNNING
);
560 r
= synthesize_connected_signal(bus
);
568 /* When Hello() failed, let's propagate this in two ways: first we return the error immediately here,
569 * which is the propagated up towards the event loop. Let's also invalidate the connection, so that
570 * if the user then calls back into us again we won't wait any longer. */
572 bus_set_state(bus
, BUS_CLOSING
);
576 static int bus_send_hello(sd_bus
*bus
) {
577 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
582 if (!bus
->bus_client
)
585 r
= sd_bus_message_new_method_call(
588 "org.freedesktop.DBus",
589 "/org/freedesktop/DBus",
590 "org.freedesktop.DBus",
595 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
598 int bus_start_running(sd_bus
*bus
) {
599 struct reply_callback
*c
;
605 assert(bus
->state
< BUS_HELLO
);
607 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
608 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
609 * adding a fixed value to all entries should not alter the internal order. */
611 n
= now(CLOCK_MONOTONIC
);
612 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
613 if (c
->timeout_usec
== 0)
616 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
619 if (bus
->bus_client
) {
620 bus_set_state(bus
, BUS_HELLO
);
624 bus_set_state(bus
, BUS_RUNNING
);
626 r
= synthesize_connected_signal(bus
);
633 static int parse_address_key(const char **p
, const char *key
, char **value
) {
634 size_t l
, n
= 0, allocated
= 0;
635 _cleanup_free_
char *r
= NULL
;
644 if (strncmp(*p
, key
, l
) != 0)
657 while (!IN_SET(*a
, ';', ',', 0)) {
671 c
= (char) ((x
<< 4) | y
);
678 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
696 free_and_replace(*value
, r
);
701 static void skip_address_key(const char **p
) {
705 *p
+= strcspn(*p
, ",");
711 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
712 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
721 while (!IN_SET(**p
, 0, ';')) {
722 r
= parse_address_key(p
, "guid", guid
);
728 r
= parse_address_key(p
, "path", &path
);
734 r
= parse_address_key(p
, "abstract", &abstract
);
743 if (!path
&& !abstract
)
746 if (path
&& abstract
)
751 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
754 b
->sockaddr
.un
= (struct sockaddr_un
) {
755 .sun_family
= AF_UNIX
,
758 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
759 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
764 l
= strlen(abstract
);
765 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
768 b
->sockaddr
.un
= (struct sockaddr_un
) {
769 .sun_family
= AF_UNIX
,
772 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
773 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
781 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
782 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
784 struct addrinfo
*result
, hints
= {
785 .ai_socktype
= SOCK_STREAM
,
786 .ai_flags
= AI_ADDRCONFIG
,
794 while (!IN_SET(**p
, 0, ';')) {
795 r
= parse_address_key(p
, "guid", guid
);
801 r
= parse_address_key(p
, "host", &host
);
807 r
= parse_address_key(p
, "port", &port
);
813 r
= parse_address_key(p
, "family", &family
);
826 if (streq(family
, "ipv4"))
827 hints
.ai_family
= AF_INET
;
828 else if (streq(family
, "ipv6"))
829 hints
.ai_family
= AF_INET6
;
834 r
= getaddrinfo(host
, port
, &hints
, &result
);
838 return -EADDRNOTAVAIL
;
840 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
841 b
->sockaddr_size
= result
->ai_addrlen
;
843 freeaddrinfo(result
);
850 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
852 unsigned n_argv
= 0, j
;
854 size_t allocated
= 0;
862 while (!IN_SET(**p
, 0, ';')) {
863 r
= parse_address_key(p
, "guid", guid
);
869 r
= parse_address_key(p
, "path", &path
);
875 if (startswith(*p
, "argv")) {
879 ul
= strtoul(*p
+ 4, (char**) p
, 10);
880 if (errno
> 0 || **p
!= '=' || ul
> 256) {
888 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
896 r
= parse_address_key(p
, NULL
, argv
+ ul
);
911 /* Make sure there are no holes in the array, with the
912 * exception of argv[0] */
913 for (j
= 1; j
< n_argv
; j
++)
919 if (argv
&& argv
[0] == NULL
) {
920 argv
[0] = strdup(path
);
935 for (j
= 0; j
< n_argv
; j
++)
943 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
944 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
952 while (!IN_SET(**p
, 0, ';')) {
953 r
= parse_address_key(p
, "guid", guid
);
959 r
= parse_address_key(p
, "machine", &machine
);
965 r
= parse_address_key(p
, "pid", &pid
);
974 if (!machine
== !pid
)
978 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
981 free_and_replace(b
->machine
, machine
);
983 b
->machine
= mfree(b
->machine
);
986 r
= parse_pid(pid
, &b
->nspid
);
992 b
->sockaddr
.un
= (struct sockaddr_un
) {
993 .sun_family
= AF_UNIX
,
994 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
995 .sun_path
= "/var/run/dbus/system_bus_socket",
997 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
1003 static void bus_reset_parsed_address(sd_bus
*b
) {
1007 b
->sockaddr_size
= 0;
1008 b
->exec_argv
= strv_free(b
->exec_argv
);
1009 b
->exec_path
= mfree(b
->exec_path
);
1010 b
->server_id
= SD_ID128_NULL
;
1011 b
->machine
= mfree(b
->machine
);
1015 static int bus_parse_next_address(sd_bus
*b
) {
1016 _cleanup_free_
char *guid
= NULL
;
1024 if (b
->address
[b
->address_index
] == 0)
1027 bus_reset_parsed_address(b
);
1029 a
= b
->address
+ b
->address_index
;
1038 if (startswith(a
, "unix:")) {
1041 r
= parse_unix_address(b
, &a
, &guid
);
1046 } else if (startswith(a
, "tcp:")) {
1049 r
= parse_tcp_address(b
, &a
, &guid
);
1055 } else if (startswith(a
, "unixexec:")) {
1058 r
= parse_exec_address(b
, &a
, &guid
);
1064 } else if (startswith(a
, "x-machine-unix:")) {
1067 r
= parse_container_unix_address(b
, &a
, &guid
);
1080 r
= sd_id128_from_string(guid
, &b
->server_id
);
1085 b
->address_index
= a
- b
->address
;
1089 static void bus_kill_exec(sd_bus
*bus
) {
1090 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1091 sigterm_wait(bus
->busexec_pid
);
1092 bus
->busexec_pid
= 0;
1096 static int bus_start_address(sd_bus
*b
) {
1102 bus_close_io_fds(b
);
1103 bus_close_inotify_fd(b
);
1107 /* If you provide multiple different bus-addresses, we
1108 * try all of them in order and use the first one that
1112 r
= bus_socket_exec(b
);
1113 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1114 r
= bus_container_connect_socket(b
);
1115 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1116 r
= bus_socket_connect(b
);
1123 q
= bus_attach_io_events(b
);
1127 q
= bus_attach_inotify_event(b
);
1134 b
->last_connect_error
= -r
;
1137 r
= bus_parse_next_address(b
);
1141 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1145 int bus_next_address(sd_bus
*b
) {
1148 bus_reset_parsed_address(b
);
1149 return bus_start_address(b
);
1152 static int bus_start_fd(sd_bus
*b
) {
1157 assert(b
->input_fd
>= 0);
1158 assert(b
->output_fd
>= 0);
1160 r
= fd_nonblock(b
->input_fd
, true);
1164 r
= fd_cloexec(b
->input_fd
, true);
1168 if (b
->input_fd
!= b
->output_fd
) {
1169 r
= fd_nonblock(b
->output_fd
, true);
1173 r
= fd_cloexec(b
->output_fd
, true);
1178 if (fstat(b
->input_fd
, &st
) < 0)
1181 return bus_socket_take_fd(b
);
1184 _public_
int sd_bus_start(sd_bus
*bus
) {
1187 assert_return(bus
, -EINVAL
);
1188 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1189 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1190 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1192 bus_set_state(bus
, BUS_OPENING
);
1194 if (bus
->is_server
&& bus
->bus_client
)
1197 if (bus
->input_fd
>= 0)
1198 r
= bus_start_fd(bus
);
1199 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1200 r
= bus_start_address(bus
);
1209 return bus_send_hello(bus
);
1212 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1214 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1217 assert_return(ret
, -EINVAL
);
1219 /* Let's connect to the starter bus if it is set, and
1220 * otherwise to the bus that is appropriate for the scope
1221 * we are running in */
1223 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1225 if (streq(e
, "system"))
1226 return sd_bus_open_system_with_description(ret
, description
);
1227 else if (STR_IN_SET(e
, "session", "user"))
1228 return sd_bus_open_user_with_description(ret
, description
);
1231 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1233 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1234 return sd_bus_open_user_with_description(ret
, description
);
1236 return sd_bus_open_system_with_description(ret
, description
);
1243 r
= sd_bus_set_address(b
, e
);
1247 b
->bus_client
= true;
1249 /* We don't know whether the bus is trusted or not, so better
1250 * be safe, and authenticate everything */
1252 b
->is_local
= false;
1253 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1255 r
= sd_bus_start(b
);
1263 _public_
int sd_bus_open(sd_bus
**ret
) {
1264 return sd_bus_open_with_description(ret
, NULL
);
1267 int bus_set_address_system(sd_bus
*b
) {
1273 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1275 r
= sd_bus_set_address(b
, e
?: DEFAULT_SYSTEM_BUS_ADDRESS
);
1277 b
->is_system
= true;
1281 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1282 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1285 assert_return(ret
, -EINVAL
);
1292 r
= sd_bus_set_description(b
, description
);
1297 r
= bus_set_address_system(b
);
1301 b
->bus_client
= true;
1303 /* Let's do per-method access control on the system bus. We
1304 * need the caller's UID and capability set for that. */
1306 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1309 r
= sd_bus_start(b
);
1317 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1318 return sd_bus_open_system_with_description(ret
, NULL
);
1321 int bus_set_address_user(sd_bus
*b
) {
1323 _cleanup_free_
char *_a
= NULL
;
1328 a
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1331 _cleanup_free_
char *ee
= NULL
;
1333 e
= secure_getenv("XDG_RUNTIME_DIR");
1337 ee
= bus_address_escape(e
);
1341 if (asprintf(&_a
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1346 r
= sd_bus_set_address(b
, a
);
1352 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1353 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1356 assert_return(ret
, -EINVAL
);
1363 r
= sd_bus_set_description(b
, description
);
1368 r
= bus_set_address_user(b
);
1372 b
->bus_client
= true;
1374 /* We don't do any per-method access control on the user bus. */
1378 r
= sd_bus_start(b
);
1386 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1387 return sd_bus_open_user_with_description(ret
, NULL
);
1390 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1391 _cleanup_free_
char *e
= NULL
;
1392 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1397 /* Skip ":"s in ipv6 addresses */
1401 rbracket
= strchr(host
, ']');
1404 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1405 e
= bus_address_escape(t
);
1408 } else if ((a
= strchr(host
, '@'))) {
1409 if (*(a
+ 1) == '[') {
1410 _cleanup_free_
char *t
= NULL
;
1412 rbracket
= strchr(a
+ 1, ']');
1415 t
= new0(char, strlen(host
));
1418 strncat(t
, host
, a
- host
+ 1);
1419 strncat(t
, a
+ 2, rbracket
- a
- 2);
1420 e
= bus_address_escape(t
);
1423 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1427 /* Let's see if a port was given */
1428 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1431 bool got_forward_slash
= false;
1437 p
= strndupa(p
, t
- p
);
1438 got_forward_slash
= true;
1441 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1442 if (!machine_name_is_valid(p
) || got_forward_slash
)
1446 goto interpret_port_as_machine_old_syntax
;
1450 /* Let's see if a machine was given */
1451 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1454 interpret_port_as_machine_old_syntax
:
1455 /* Let's make sure this is not a port of some kind,
1456 * and is a valid machine name. */
1457 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1458 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1464 t
= strndupa(host
, strcspn(host
, ":/"));
1466 e
= bus_address_escape(t
);
1471 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1472 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1473 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1477 return free_and_replace(b
->address
, a
);
1480 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1481 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1484 assert_return(host
, -EINVAL
);
1485 assert_return(ret
, -EINVAL
);
1491 r
= bus_set_address_system_remote(b
, host
);
1495 b
->bus_client
= true;
1497 b
->is_system
= true;
1498 b
->is_local
= false;
1500 r
= sd_bus_start(b
);
1508 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1509 _cleanup_free_
char *e
= NULL
;
1515 e
= bus_address_escape(machine
);
1519 a
= strjoin("x-machine-unix:machine=", e
);
1523 return free_and_replace(b
->address
, a
);
1526 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1527 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1530 assert_return(machine
, -EINVAL
);
1531 assert_return(ret
, -EINVAL
);
1532 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1538 r
= bus_set_address_system_machine(b
, machine
);
1542 b
->bus_client
= true;
1544 b
->is_system
= true;
1545 b
->is_local
= false;
1547 r
= sd_bus_start(b
);
1555 _public_
void sd_bus_close(sd_bus
*bus
) {
1558 if (bus
->state
== BUS_CLOSED
)
1560 if (bus_pid_changed(bus
))
1563 /* Don't leave ssh hanging around */
1566 bus_set_state(bus
, BUS_CLOSED
);
1568 sd_bus_detach_event(bus
);
1570 /* Drop all queued messages so that they drop references to
1571 * the bus object and the bus may be freed */
1572 bus_reset_queues(bus
);
1574 bus_close_io_fds(bus
);
1575 bus_close_inotify_fd(bus
);
1578 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1584 return sd_bus_unref(bus
);
1587 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1591 /* Have to do this before flush() to prevent hang */
1595 return sd_bus_close_unref(bus
);
1598 void bus_enter_closing(sd_bus
*bus
) {
1601 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1604 bus_set_state(bus
, BUS_CLOSING
);
1607 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1609 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1610 assert_return(bus
, -EINVAL
);
1611 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1612 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1614 return BUS_IS_OPEN(bus
->state
);
1617 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1618 assert_return(bus
, -EINVAL
);
1619 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1620 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1622 return bus
->state
== BUS_RUNNING
;
1625 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1628 assert_return(bus
, -EINVAL
);
1629 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1630 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1631 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1633 if (bus
->is_monitor
)
1636 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1637 if (!bus
->accept_fd
)
1640 r
= bus_ensure_running(bus
);
1644 return bus
->can_fds
;
1647 return bus_type_is_valid(type
);
1650 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1653 assert_return(bus
, -EINVAL
);
1654 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1655 assert_return(id
, -EINVAL
);
1656 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1658 r
= bus_ensure_running(bus
);
1662 *id
= bus
->server_id
;
1666 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1668 static uint64_t cookie_inc(uint64_t cookie
) {
1670 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1671 if (cookie
>= UINT32_MAX
)
1672 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1673 * whether we are looping. */
1678 static int next_cookie(sd_bus
*b
) {
1679 uint64_t new_cookie
;
1683 new_cookie
= cookie_inc(b
->cookie
);
1685 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1686 * least once, but then do it thorougly. */
1687 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1690 /* Check if the cookie is currently in use. If so, pick the next one */
1691 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1692 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1695 new_cookie
= cookie_inc(new_cookie
);
1698 /* Can't fulfill request */
1703 b
->cookie
= new_cookie
;
1707 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1714 /* If we copy the same message to multiple
1715 * destinations, avoid using the same cookie
1717 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1722 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1727 if (!m
->sender
&& b
->patch_sender
) {
1728 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1737 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1740 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1741 bool remarshal
= false;
1745 /* wrong packet version */
1746 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1749 /* wrong packet endianness */
1750 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1753 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1756 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1760 /* Fake some timestamps, if they were requested, and not
1761 * already initialized */
1762 if (b
->attach_timestamp
) {
1763 if (m
->realtime
<= 0)
1764 m
->realtime
= now(CLOCK_REALTIME
);
1766 if (m
->monotonic
<= 0)
1767 m
->monotonic
= now(CLOCK_MONOTONIC
);
1770 /* The bus specification says the serial number cannot be 0,
1771 * hence let's fill something in for synthetic messages. Since
1772 * synthetic messages might have a fake sender and we don't
1773 * want to interfere with the real sender's serial numbers we
1774 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1775 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1776 * even though kdbus can do 64bit. */
1777 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1780 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1786 r
= bus_socket_write_message(bus
, m
, idx
);
1790 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1791 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",
1792 bus_message_type_to_string(m
->header
->type
),
1793 strna(sd_bus_message_get_sender(m
)),
1794 strna(sd_bus_message_get_destination(m
)),
1795 strna(sd_bus_message_get_path(m
)),
1796 strna(sd_bus_message_get_interface(m
)),
1797 strna(sd_bus_message_get_member(m
)),
1798 BUS_MESSAGE_COOKIE(m
),
1800 strna(m
->root_container
.signature
),
1801 strna(m
->error
.name
),
1802 strna(m
->error
.message
));
1807 static int dispatch_wqueue(sd_bus
*bus
) {
1811 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1813 while (bus
->wqueue_size
> 0) {
1815 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1819 /* Didn't do anything this time */
1821 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1822 /* Fully written. Let's drop the entry from
1825 * This isn't particularly optimized, but
1826 * well, this is supposed to be our worst-case
1827 * buffer only, and the socket buffer is
1828 * supposed to be our primary buffer, and if
1829 * it got full, then all bets are off
1833 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1834 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1844 static int bus_read_message(sd_bus
*bus
) {
1847 return bus_socket_read_message(bus
);
1850 int bus_rqueue_make_room(sd_bus
*bus
) {
1853 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1856 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1862 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1864 assert(i
< bus
->rqueue_size
);
1866 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1867 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1871 static int dispatch_rqueue(sd_bus
*bus
, sd_bus_message
**m
) {
1876 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1879 if (bus
->rqueue_size
> 0) {
1880 /* Dispatch a queued message */
1881 *m
= sd_bus_message_ref(bus
->rqueue
[0]);
1882 rqueue_drop_one(bus
, 0);
1886 /* Try to read a new message */
1887 r
= bus_read_message(bus
);
1899 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1900 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1903 assert_return(m
, -EINVAL
);
1906 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1908 assert_return(bus
= m
->bus
, -ENOTCONN
);
1909 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1911 if (!BUS_IS_OPEN(bus
->state
))
1915 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1922 /* If the cookie number isn't kept, then we know that no reply
1924 if (!cookie
&& !m
->sealed
)
1925 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1927 r
= bus_seal_message(bus
, m
, 0);
1931 /* Remarshall if we have to. This will possibly unref the
1932 * message and place a replacement in m */
1933 r
= bus_remarshal_message(bus
, &m
);
1937 /* If this is a reply and no reply was requested, then let's
1938 * suppress this, if we can */
1942 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1945 r
= bus_write_message(bus
, m
, &idx
);
1947 if (ERRNO_IS_DISCONNECT(r
)) {
1948 bus_enter_closing(bus
);
1955 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1956 /* Wasn't fully written. So let's remember how
1957 * much was written. Note that the first entry
1958 * of the wqueue array is always allocated so
1959 * that we always can remember how much was
1961 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1962 bus
->wqueue_size
= 1;
1967 /* Just append it to the queue. */
1969 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1972 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1975 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1980 *cookie
= BUS_MESSAGE_COOKIE(m
);
1985 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1988 assert_return(m
, -EINVAL
);
1991 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1993 assert_return(bus
= m
->bus
, -ENOTCONN
);
1994 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1996 if (!BUS_IS_OPEN(bus
->state
))
1999 if (!streq_ptr(m
->destination
, destination
)) {
2004 r
= sd_bus_message_set_destination(m
, destination
);
2009 return sd_bus_send(bus
, m
, cookie
);
2012 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
2015 if (usec
== (uint64_t) -1)
2018 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2019 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2020 * relative timestamp, and afterwards the absolute one. */
2022 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2025 return now(CLOCK_MONOTONIC
) + usec
;
2028 static int timeout_compare(const void *a
, const void *b
) {
2029 const struct reply_callback
*x
= a
, *y
= b
;
2031 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2034 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2037 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2040 _public_
int sd_bus_call_async(
2044 sd_bus_message_handler_t callback
,
2048 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2049 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2052 assert_return(m
, -EINVAL
);
2053 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2054 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2057 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2059 assert_return(bus
= m
->bus
, -ENOTCONN
);
2060 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2062 if (!BUS_IS_OPEN(bus
->state
))
2065 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2066 if (!callback
&& !slot
&& !m
->sealed
)
2067 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2069 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2073 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2077 r
= bus_seal_message(bus
, m
, usec
);
2081 r
= bus_remarshal_message(bus
, &m
);
2085 if (slot
|| callback
) {
2086 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2090 s
->reply_callback
.callback
= callback
;
2092 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2093 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2095 s
->reply_callback
.cookie
= 0;
2099 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2100 if (s
->reply_callback
.timeout_usec
!= 0) {
2101 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2103 s
->reply_callback
.timeout_usec
= 0;
2109 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2120 int bus_ensure_running(sd_bus
*bus
) {
2125 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2127 if (bus
->state
== BUS_RUNNING
)
2131 r
= sd_bus_process(bus
, NULL
);
2134 if (bus
->state
== BUS_RUNNING
)
2139 r
= sd_bus_wait(bus
, (uint64_t) -1);
2145 _public_
int sd_bus_call(
2149 sd_bus_error
*error
,
2150 sd_bus_message
**reply
) {
2152 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2158 bus_assert_return(m
, -EINVAL
, error
);
2159 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2160 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2161 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2164 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2166 assert_return(bus
= m
->bus
, -ENOTCONN
);
2167 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2169 if (!BUS_IS_OPEN(bus
->state
)) {
2174 r
= bus_ensure_running(bus
);
2178 i
= bus
->rqueue_size
;
2180 r
= bus_seal_message(bus
, m
, usec
);
2184 r
= bus_remarshal_message(bus
, &m
);
2188 r
= sd_bus_send(bus
, m
, &cookie
);
2192 timeout
= calc_elapse(bus
, m
->timeout
);
2197 while (i
< bus
->rqueue_size
) {
2198 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2200 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2202 if (incoming
->reply_cookie
== cookie
) {
2203 /* Found a match! */
2205 rqueue_drop_one(bus
, i
);
2206 log_debug_bus_message(incoming
);
2208 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2210 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2212 *reply
= TAKE_PTR(incoming
);
2217 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2219 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2220 return sd_bus_error_copy(error
, &incoming
->error
);
2226 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2229 streq(bus
->unique_name
, incoming
->sender
)) {
2231 rqueue_drop_one(bus
, i
);
2233 /* Our own message? Somebody is trying to send its own client a message,
2234 * let's not dead-lock, let's fail immediately. */
2240 /* Try to read more, right-away */
2244 r
= bus_read_message(bus
);
2246 if (ERRNO_IS_DISCONNECT(r
)) {
2247 bus_enter_closing(bus
);
2259 n
= now(CLOCK_MONOTONIC
);
2267 left
= (uint64_t) -1;
2269 r
= bus_poll(bus
, true, left
);
2277 r
= dispatch_wqueue(bus
);
2279 if (ERRNO_IS_DISCONNECT(r
)) {
2280 bus_enter_closing(bus
);
2289 return sd_bus_error_set_errno(error
, r
);
2292 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2293 assert_return(bus
, -EINVAL
);
2294 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2295 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2296 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2298 if (bus
->state
== BUS_CLOSED
)
2301 if (bus
->inotify_fd
>= 0)
2302 return bus
->inotify_fd
;
2304 if (bus
->input_fd
>= 0)
2305 return bus
->input_fd
;
2310 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2313 assert_return(bus
, -EINVAL
);
2314 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2315 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2317 switch (bus
->state
) {
2323 case BUS_WATCH_BIND
:
2331 case BUS_AUTHENTICATING
:
2332 if (bus_socket_auth_needs_write(bus
))
2340 if (bus
->rqueue_size
<= 0)
2342 if (bus
->wqueue_size
> 0)
2350 assert_not_reached("Unknown state");
2356 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2357 struct reply_callback
*c
;
2359 assert_return(bus
, -EINVAL
);
2360 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2361 assert_return(timeout_usec
, -EINVAL
);
2362 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2364 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2367 if (bus
->track_queue
) {
2372 switch (bus
->state
) {
2374 case BUS_AUTHENTICATING
:
2375 *timeout_usec
= bus
->auth_timeout
;
2380 if (bus
->rqueue_size
> 0) {
2385 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2387 *timeout_usec
= (uint64_t) -1;
2391 if (c
->timeout_usec
== 0) {
2392 *timeout_usec
= (uint64_t) -1;
2396 *timeout_usec
= c
->timeout_usec
;
2403 case BUS_WATCH_BIND
:
2405 *timeout_usec
= (uint64_t) -1;
2409 assert_not_reached("Unknown or unexpected stat");
2413 static int process_timeout(sd_bus
*bus
) {
2414 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2415 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2416 struct reply_callback
*c
;
2423 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2425 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2429 n
= now(CLOCK_MONOTONIC
);
2430 if (c
->timeout_usec
> n
)
2433 r
= bus_message_new_synthetic_error(
2436 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2441 m
->read_counter
= ++bus
->read_counter
;
2443 r
= bus_seal_synthetic_message(bus
, m
);
2447 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2448 c
->timeout_usec
= 0;
2450 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2453 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2455 bus
->iteration_counter
++;
2457 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2459 bus
->current_message
= m
;
2460 bus
->current_slot
= sd_bus_slot_ref(slot
);
2461 bus
->current_handler
= c
->callback
;
2462 bus
->current_userdata
= slot
->userdata
;
2463 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2464 bus
->current_userdata
= NULL
;
2465 bus
->current_handler
= NULL
;
2466 bus
->current_slot
= NULL
;
2467 bus
->current_message
= NULL
;
2470 bus_slot_disconnect(slot
, true);
2472 sd_bus_slot_unref(slot
);
2474 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2475 * and ignore the callback handler's return value. */
2479 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2482 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2486 if (bus
->state
!= BUS_HELLO
)
2489 /* Let's make sure the first message on the bus is the HELLO
2490 * reply. But note that we don't actually parse the message
2491 * here (we leave that to the usual handling), we just verify
2492 * we don't let any earlier msg through. */
2494 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2497 if (m
->reply_cookie
!= 1)
2503 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2504 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2505 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2506 struct reply_callback
*c
;
2514 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2517 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2520 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2526 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2528 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2530 /* If the reply contained a file descriptor which we
2531 * didn't want we pass an error instead. */
2533 r
= bus_message_new_synthetic_error(
2536 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2541 /* Copy over original timestamp */
2542 synthetic_reply
->realtime
= m
->realtime
;
2543 synthetic_reply
->monotonic
= m
->monotonic
;
2544 synthetic_reply
->seqnum
= m
->seqnum
;
2545 synthetic_reply
->read_counter
= m
->read_counter
;
2547 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2551 m
= synthetic_reply
;
2553 r
= sd_bus_message_rewind(m
, true);
2558 if (c
->timeout_usec
!= 0) {
2559 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2560 c
->timeout_usec
= 0;
2563 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2565 bus
->current_slot
= sd_bus_slot_ref(slot
);
2566 bus
->current_handler
= c
->callback
;
2567 bus
->current_userdata
= slot
->userdata
;
2568 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2569 bus
->current_userdata
= NULL
;
2570 bus
->current_handler
= NULL
;
2571 bus
->current_slot
= NULL
;
2574 bus_slot_disconnect(slot
, true);
2576 sd_bus_slot_unref(slot
);
2578 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2579 * ignore the callback handler's return value. */
2583 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2586 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2587 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2588 struct filter_callback
*l
;
2595 bus
->filter_callbacks_modified
= false;
2597 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2600 if (bus
->filter_callbacks_modified
)
2603 /* Don't run this more than once per iteration */
2604 if (l
->last_iteration
== bus
->iteration_counter
)
2607 l
->last_iteration
= bus
->iteration_counter
;
2609 r
= sd_bus_message_rewind(m
, true);
2613 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2615 bus
->current_slot
= sd_bus_slot_ref(slot
);
2616 bus
->current_handler
= l
->callback
;
2617 bus
->current_userdata
= slot
->userdata
;
2618 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2619 bus
->current_userdata
= NULL
;
2620 bus
->current_handler
= NULL
;
2621 bus
->current_slot
= sd_bus_slot_unref(slot
);
2623 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2629 } while (bus
->filter_callbacks_modified
);
2634 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2641 bus
->match_callbacks_modified
= false;
2643 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2647 } while (bus
->match_callbacks_modified
);
2652 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2653 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2659 if (bus
->is_monitor
)
2662 if (bus
->manual_peer_interface
)
2665 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2668 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2671 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2674 if (streq_ptr(m
->member
, "Ping"))
2675 r
= sd_bus_message_new_method_return(m
, &reply
);
2676 else if (streq_ptr(m
->member
, "GetMachineId")) {
2678 char sid
[SD_ID128_STRING_MAX
];
2680 r
= sd_id128_get_machine(&id
);
2684 r
= sd_bus_message_new_method_return(m
, &reply
);
2688 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2690 r
= sd_bus_message_new_method_errorf(
2692 SD_BUS_ERROR_UNKNOWN_METHOD
,
2693 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2698 r
= sd_bus_send(bus
, reply
, NULL
);
2705 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2709 /* If we got a message with a file descriptor which we didn't
2710 * want to accept, then let's drop it. How can this even
2711 * happen? For example, when the kernel queues a message into
2712 * an activatable names's queue which allows fds, and then is
2713 * delivered to us later even though we ourselves did not
2716 if (bus
->is_monitor
)
2725 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2726 return 1; /* just eat it up */
2728 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2731 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2737 bus
->current_message
= m
;
2738 bus
->iteration_counter
++;
2740 log_debug_bus_message(m
);
2742 r
= process_hello(bus
, m
);
2746 r
= process_reply(bus
, m
);
2750 r
= process_fd_check(bus
, m
);
2754 r
= process_filter(bus
, m
);
2758 r
= process_match(bus
, m
);
2762 r
= process_builtin(bus
, m
);
2766 r
= bus_process_object(bus
, m
);
2769 bus
->current_message
= NULL
;
2773 static int dispatch_track(sd_bus
*bus
) {
2776 if (!bus
->track_queue
)
2779 bus_track_dispatch(bus
->track_queue
);
2783 static int process_running(sd_bus
*bus
, sd_bus_message
**ret
) {
2784 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2788 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2790 r
= process_timeout(bus
);
2794 r
= dispatch_wqueue(bus
);
2798 r
= dispatch_track(bus
);
2802 r
= dispatch_rqueue(bus
, &m
);
2808 r
= process_message(bus
, m
);
2813 r
= sd_bus_message_rewind(m
, true);
2821 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2823 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2824 strna(sd_bus_message_get_sender(m
)),
2825 strna(sd_bus_message_get_path(m
)),
2826 strna(sd_bus_message_get_interface(m
)),
2827 strna(sd_bus_message_get_member(m
)));
2829 r
= sd_bus_reply_method_errorf(
2831 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2832 "Unknown object '%s'.", m
->path
);
2846 static int bus_exit_now(sd_bus
*bus
) {
2849 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2850 * sd_event_exit(), otherwise invokes libc exit(). */
2852 if (bus
->exited
) /* did we already exit? */
2854 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2856 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2859 bus
->exited
= true; /* never exit more than once */
2861 log_debug("Bus connection disconnected, exiting.");
2864 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2868 assert_not_reached("exit() didn't exit?");
2871 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2872 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2873 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2880 r
= bus_message_new_synthetic_error(
2883 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2888 m
->read_counter
= ++bus
->read_counter
;
2890 r
= bus_seal_synthetic_message(bus
, m
);
2894 if (c
->timeout_usec
!= 0) {
2895 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2896 c
->timeout_usec
= 0;
2899 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2902 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2904 bus
->iteration_counter
++;
2906 bus
->current_message
= m
;
2907 bus
->current_slot
= sd_bus_slot_ref(slot
);
2908 bus
->current_handler
= c
->callback
;
2909 bus
->current_userdata
= slot
->userdata
;
2910 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2911 bus
->current_userdata
= NULL
;
2912 bus
->current_handler
= NULL
;
2913 bus
->current_slot
= NULL
;
2914 bus
->current_message
= NULL
;
2917 bus_slot_disconnect(slot
, true);
2919 sd_bus_slot_unref(slot
);
2921 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2924 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2925 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2926 struct reply_callback
*c
;
2930 assert(bus
->state
== BUS_CLOSING
);
2932 /* First, fail all outstanding method calls */
2933 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2935 return process_closing_reply_callback(bus
, c
);
2937 /* Then, fake-drop all remaining bus tracking references */
2939 bus_track_close(bus
->tracks
);
2943 /* Then, synthesize a Disconnected message */
2944 r
= sd_bus_message_new_signal(
2947 "/org/freedesktop/DBus/Local",
2948 "org.freedesktop.DBus.Local",
2953 bus_message_set_sender_local(bus
, m
);
2954 m
->read_counter
= ++bus
->read_counter
;
2956 r
= bus_seal_synthetic_message(bus
, m
);
2962 bus
->current_message
= m
;
2963 bus
->iteration_counter
++;
2965 r
= process_filter(bus
, m
);
2969 r
= process_match(bus
, m
);
2973 /* Nothing else to do, exit now, if the condition holds */
2974 bus
->exit_triggered
= true;
2975 (void) bus_exit_now(bus
);
2983 bus
->current_message
= NULL
;
2988 static int bus_process_internal(sd_bus
*bus
, sd_bus_message
**ret
) {
2991 /* Returns 0 when we didn't do anything. This should cause the
2992 * caller to invoke sd_bus_wait() before returning the next
2993 * time. Returns > 0 when we did something, which possibly
2994 * means *ret is filled in with an unprocessed message. */
2996 assert_return(bus
, -EINVAL
);
2997 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2998 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3000 /* We don't allow recursively invoking sd_bus_process(). */
3001 assert_return(!bus
->current_message
, -EBUSY
);
3002 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
3004 BUS_DONT_DESTROY(bus
);
3006 switch (bus
->state
) {
3014 case BUS_WATCH_BIND
:
3015 r
= bus_socket_process_watch_bind(bus
);
3019 r
= bus_socket_process_opening(bus
);
3022 case BUS_AUTHENTICATING
:
3023 r
= bus_socket_process_authenticating(bus
);
3028 r
= process_running(bus
, ret
);
3032 /* This branch initializes *ret, hence we don't use the generic error checking below */
3036 return process_closing(bus
, ret
);
3039 assert_not_reached("Unknown state");
3042 if (ERRNO_IS_DISCONNECT(r
)) {
3043 bus_enter_closing(bus
);
3054 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3055 return bus_process_internal(bus
, ret
);
3058 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3059 return bus_process_internal(bus
, ret
);
3062 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3063 struct pollfd p
[2] = {};
3066 usec_t m
= USEC_INFINITY
;
3070 if (bus
->state
== BUS_CLOSING
)
3073 if (!BUS_IS_OPEN(bus
->state
))
3076 if (bus
->state
== BUS_WATCH_BIND
) {
3077 assert(bus
->inotify_fd
>= 0);
3079 p
[0].events
= POLLIN
;
3080 p
[0].fd
= bus
->inotify_fd
;
3085 e
= sd_bus_get_events(bus
);
3090 /* The caller really needs some more data, he doesn't
3091 * care about what's already read, or any timeouts
3092 * except its own. */
3096 /* The caller wants to process if there's something to
3097 * process, but doesn't care otherwise */
3099 r
= sd_bus_get_timeout(bus
, &until
);
3103 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3106 p
[0].fd
= bus
->input_fd
;
3107 if (bus
->output_fd
== bus
->input_fd
) {
3111 p
[0].events
= e
& POLLIN
;
3112 p
[1].fd
= bus
->output_fd
;
3113 p
[1].events
= e
& POLLOUT
;
3118 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3121 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3127 if (p
[0].revents
& POLLNVAL
)
3129 if (n
>= 2 && (p
[1].revents
& POLLNVAL
))
3135 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3137 assert_return(bus
, -EINVAL
);
3138 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3139 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3141 if (bus
->state
== BUS_CLOSING
)
3144 if (!BUS_IS_OPEN(bus
->state
))
3147 if (bus
->rqueue_size
> 0)
3150 return bus_poll(bus
, false, timeout_usec
);
3153 _public_
int sd_bus_flush(sd_bus
*bus
) {
3156 assert_return(bus
, -EINVAL
);
3157 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3158 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3160 if (bus
->state
== BUS_CLOSING
)
3163 if (!BUS_IS_OPEN(bus
->state
))
3166 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3167 if (bus
->state
== BUS_WATCH_BIND
)
3170 r
= bus_ensure_running(bus
);
3174 if (bus
->wqueue_size
<= 0)
3178 r
= dispatch_wqueue(bus
);
3180 if (ERRNO_IS_DISCONNECT(r
)) {
3181 bus_enter_closing(bus
);
3188 if (bus
->wqueue_size
<= 0)
3191 r
= bus_poll(bus
, false, (uint64_t) -1);
3197 _public_
int sd_bus_add_filter(
3200 sd_bus_message_handler_t callback
,
3205 assert_return(bus
, -EINVAL
);
3206 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3207 assert_return(callback
, -EINVAL
);
3208 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3210 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3214 s
->filter_callback
.callback
= callback
;
3216 bus
->filter_callbacks_modified
= true;
3217 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3225 static int add_match_callback(
3228 sd_bus_error
*ret_error
) {
3230 sd_bus_slot
*match_slot
= userdata
;
3231 bool failed
= false;
3237 sd_bus_slot_ref(match_slot
);
3239 if (sd_bus_message_is_method_error(m
, NULL
)) {
3240 log_debug_errno(sd_bus_message_get_errno(m
),
3241 "Unable to add match %s, failing connection: %s",
3242 match_slot
->match_callback
.match_string
,
3243 sd_bus_message_get_error(m
)->message
);
3247 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3249 if (match_slot
->match_callback
.install_callback
) {
3252 bus
= sd_bus_message_get_bus(m
);
3254 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3255 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3258 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3259 assert(bus
->current_handler
== add_match_callback
);
3260 assert(bus
->current_userdata
== userdata
);
3262 bus
->current_slot
= match_slot
;
3263 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3264 bus
->current_userdata
= match_slot
->userdata
;
3266 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3268 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3269 bus
->current_handler
= add_match_callback
;
3270 bus
->current_userdata
= userdata
;
3272 if (failed
) /* Generic failure handling: destroy the connection */
3273 bus_enter_closing(sd_bus_message_get_bus(m
));
3278 /* We don't need the install method reply slot anymore, let's free it */
3279 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3281 if (failed
&& match_slot
->floating
)
3282 bus_slot_disconnect(match_slot
, true);
3284 sd_bus_slot_unref(match_slot
);
3289 static int bus_add_match_full(
3294 sd_bus_message_handler_t callback
,
3295 sd_bus_message_handler_t install_callback
,
3298 struct bus_match_component
*components
= NULL
;
3299 unsigned n_components
= 0;
3300 sd_bus_slot
*s
= NULL
;
3303 assert_return(bus
, -EINVAL
);
3304 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3305 assert_return(match
, -EINVAL
);
3306 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3308 r
= bus_match_parse(match
, &components
, &n_components
);
3312 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3318 s
->match_callback
.callback
= callback
;
3319 s
->match_callback
.install_callback
= install_callback
;
3321 if (bus
->bus_client
) {
3322 enum bus_match_scope scope
;
3324 scope
= bus_match_get_scope(components
, n_components
);
3326 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3327 if (scope
!= BUS_MATCH_LOCAL
) {
3329 /* We store the original match string, so that we can use it to remove the match again. */
3331 s
->match_callback
.match_string
= strdup(match
);
3332 if (!s
->match_callback
.match_string
) {
3338 r
= bus_add_match_internal_async(bus
,
3339 &s
->match_callback
.install_slot
,
3340 s
->match_callback
.match_string
,
3347 /* Make the slot of the match call floating now. We need the reference, but we don't
3348 * want that this match pins the bus object, hence we first create it non-floating, but
3349 * then make it floating. */
3350 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3352 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
, &s
->match_callback
.after
);
3356 s
->match_added
= true;
3360 bus
->match_callbacks_modified
= true;
3361 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3370 bus_match_parse_free(components
, n_components
);
3371 sd_bus_slot_unref(s
);
3376 _public_
int sd_bus_add_match(
3380 sd_bus_message_handler_t callback
,
3383 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3386 _public_
int sd_bus_add_match_async(
3390 sd_bus_message_handler_t callback
,
3391 sd_bus_message_handler_t install_callback
,
3394 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3397 bool bus_pid_changed(sd_bus
*bus
) {
3400 /* We don't support people creating a bus connection and
3401 * keeping it around over a fork(). Let's complain. */
3403 return bus
->original_pid
!= getpid_cached();
3406 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3407 sd_bus
*bus
= userdata
;
3412 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3414 r
= sd_bus_process(bus
, NULL
);
3416 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3417 bus_enter_closing(bus
);
3423 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3424 sd_bus
*bus
= userdata
;
3429 r
= sd_bus_process(bus
, NULL
);
3431 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3432 bus_enter_closing(bus
);
3438 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3439 sd_bus
*bus
= userdata
;
3446 e
= sd_bus_get_events(bus
);
3452 if (bus
->output_fd
!= bus
->input_fd
) {
3454 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3458 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3460 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3464 r
= sd_bus_get_timeout(bus
, &until
);
3470 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3477 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3484 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3485 bus_enter_closing(bus
);
3490 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3491 sd_bus
*bus
= userdata
;
3495 if (bus
->close_on_exit
) {
3503 int bus_attach_io_events(sd_bus
*bus
) {
3508 if (bus
->input_fd
< 0)
3514 if (!bus
->input_io_event_source
) {
3515 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3519 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3523 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3527 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3529 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3534 if (bus
->output_fd
!= bus
->input_fd
) {
3535 assert(bus
->output_fd
>= 0);
3537 if (!bus
->output_io_event_source
) {
3538 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3542 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3546 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3548 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3557 static void bus_detach_io_events(sd_bus
*bus
) {
3560 if (bus
->input_io_event_source
) {
3561 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3562 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3565 if (bus
->output_io_event_source
) {
3566 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3567 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3571 int bus_attach_inotify_event(sd_bus
*bus
) {
3576 if (bus
->inotify_fd
< 0)
3582 if (!bus
->inotify_event_source
) {
3583 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3587 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3591 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3593 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3600 static void bus_detach_inotify_event(sd_bus
*bus
) {
3603 if (bus
->inotify_event_source
) {
3604 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3605 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3609 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3612 assert_return(bus
, -EINVAL
);
3613 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3614 assert_return(!bus
->event
, -EBUSY
);
3616 assert(!bus
->input_io_event_source
);
3617 assert(!bus
->output_io_event_source
);
3618 assert(!bus
->time_event_source
);
3621 bus
->event
= sd_event_ref(event
);
3623 r
= sd_event_default(&bus
->event
);
3628 bus
->event_priority
= priority
;
3630 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3634 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3638 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3642 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3646 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3650 r
= bus_attach_io_events(bus
);
3654 r
= bus_attach_inotify_event(bus
);
3661 sd_bus_detach_event(bus
);
3665 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3666 assert_return(bus
, -EINVAL
);
3667 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3672 bus_detach_io_events(bus
);
3673 bus_detach_inotify_event(bus
);
3675 if (bus
->time_event_source
) {
3676 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3677 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3680 if (bus
->quit_event_source
) {
3681 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3682 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3685 bus
->event
= sd_event_unref(bus
->event
);
3689 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3690 assert_return(bus
= bus_resolve(bus
), NULL
);
3695 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3696 assert_return(bus
= bus_resolve(bus
), NULL
);
3698 return bus
->current_message
;
3701 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3702 assert_return(bus
= bus_resolve(bus
), NULL
);
3704 return bus
->current_slot
;
3707 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3708 assert_return(bus
= bus_resolve(bus
), NULL
);
3710 return bus
->current_handler
;
3713 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3714 assert_return(bus
= bus_resolve(bus
), NULL
);
3716 return bus
->current_userdata
;
3719 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3724 assert(default_bus
);
3727 return !!*default_bus
;
3730 *ret
= sd_bus_ref(*default_bus
);
3738 b
->default_bus_ptr
= default_bus
;
3746 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3747 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3750 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3751 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3754 _public_
int sd_bus_default(sd_bus
**ret
) {
3755 int (*bus_open
)(sd_bus
**) = NULL
;
3758 busp
= bus_choose_default(&bus_open
);
3759 return bus_default(bus_open
, busp
, ret
);
3762 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3763 assert_return(b
, -EINVAL
);
3764 assert_return(tid
, -EINVAL
);
3765 assert_return(!bus_pid_changed(b
), -ECHILD
);
3773 return sd_event_get_tid(b
->event
, tid
);
3778 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3779 _cleanup_free_
char *e
= NULL
;
3782 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3783 assert_return(external_id
, -EINVAL
);
3784 assert_return(ret_path
, -EINVAL
);
3786 e
= bus_label_escape(external_id
);
3790 ret
= path_join(prefix
, e
);
3798 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3802 assert_return(object_path_is_valid(path
), -EINVAL
);
3803 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3804 assert_return(external_id
, -EINVAL
);
3806 e
= object_path_startswith(path
, prefix
);
3808 *external_id
= NULL
;
3812 ret
= bus_label_unescape(e
);
3820 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3821 _cleanup_strv_free_
char **labels
= NULL
;
3822 char *path
, *path_pos
, **label_pos
;
3823 const char *sep
, *template_pos
;
3828 assert_return(out
, -EINVAL
);
3829 assert_return(path_template
, -EINVAL
);
3831 path_length
= strlen(path_template
);
3833 va_start(list
, path_template
);
3834 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3838 arg
= va_arg(list
, const char *);
3844 label
= bus_label_escape(arg
);
3850 r
= strv_consume(&labels
, label
);
3856 /* add label length, but account for the format character */
3857 path_length
+= strlen(label
) - 1;
3861 path
= malloc(path_length
+ 1);
3868 for (template_pos
= path_template
; *template_pos
; ) {
3869 sep
= strchrnul(template_pos
, '%');
3870 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3874 path_pos
= stpcpy(path_pos
, *label_pos
++);
3875 template_pos
= sep
+ 1;
3883 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3884 _cleanup_strv_free_
char **labels
= NULL
;
3885 const char *template_pos
, *path_pos
;
3891 * This decodes an object-path based on a template argument. The
3892 * template consists of a verbatim path, optionally including special
3895 * - Each occurrence of '%' in the template matches an arbitrary
3896 * substring of a label in the given path. At most one such
3897 * directive is allowed per label. For each such directive, the
3898 * caller must provide an output parameter (char **) via va_arg. If
3899 * NULL is passed, the given label is verified, but not returned.
3900 * For each matched label, the *decoded* label is stored in the
3901 * passed output argument, and the caller is responsible to free
3902 * it. Note that the output arguments are only modified if the
3903 * actually path matched the template. Otherwise, they're left
3906 * This function returns <0 on error, 0 if the path does not match the
3907 * template, 1 if it matched.
3910 assert_return(path
, -EINVAL
);
3911 assert_return(path_template
, -EINVAL
);
3915 for (template_pos
= path_template
; *template_pos
; ) {
3920 /* verify everything until the next '%' matches verbatim */
3921 sep
= strchrnul(template_pos
, '%');
3922 length
= sep
- template_pos
;
3923 if (strncmp(path_pos
, template_pos
, length
))
3927 template_pos
+= length
;
3932 /* We found the next '%' character. Everything up until here
3933 * matched. We now skip ahead to the end of this label and make
3934 * sure it matches the tail of the label in the path. Then we
3935 * decode the string in-between and save it for later use. */
3937 ++template_pos
; /* skip over '%' */
3939 sep
= strchrnul(template_pos
, '/');
3940 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3942 /* verify the suffixes match */
3943 sep
= strchrnul(path_pos
, '/');
3944 if (sep
- path_pos
< (ssize_t
)length
||
3945 strncmp(sep
- length
, template_pos
, length
))
3948 template_pos
+= length
; /* skip over matched label */
3949 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3951 /* store unescaped label for later use */
3952 label
= bus_label_unescape_n(path_pos
, length
);
3956 r
= strv_consume(&labels
, label
);
3960 path_pos
= sep
; /* skip decoded label and suffix */
3963 /* end of template must match end of path */
3967 /* copy the labels over to the caller */
3968 va_start(list
, path_template
);
3969 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3972 arg
= va_arg(list
, char **);
3980 labels
= mfree(labels
);
3984 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3985 assert_return(bus
, -EINVAL
);
3986 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3987 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3992 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3993 assert_return(bus
, -EINVAL
);
3994 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3995 assert_return(description
, -EINVAL
);
3996 assert_return(bus
->description
, -ENXIO
);
3997 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3999 if (bus
->description
)
4000 *description
= bus
->description
;
4001 else if (bus
->is_system
)
4002 *description
= "system";
4003 else if (bus
->is_user
)
4004 *description
= "user";
4006 *description
= NULL
;
4011 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
4012 assert_return(bus
, -EINVAL
);
4013 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4014 assert_return(scope
, -EINVAL
);
4015 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4022 if (bus
->is_system
) {
4030 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4031 assert_return(bus
, -EINVAL
);
4032 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4033 assert_return(address
, -EINVAL
);
4034 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4037 *address
= bus
->address
;
4044 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4045 assert_return(bus
, -EINVAL
);
4046 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4047 assert_return(mask
, -EINVAL
);
4048 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4050 *mask
= bus
->creds_mask
;
4054 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4055 assert_return(bus
, -EINVAL
);
4056 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4057 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4059 return bus
->bus_client
;
4062 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4063 assert_return(bus
, -EINVAL
);
4064 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4065 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4067 return bus
->is_server
;
4070 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4071 assert_return(bus
, -EINVAL
);
4072 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4073 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4075 return bus
->anonymous_auth
;
4078 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4079 assert_return(bus
, -EINVAL
);
4080 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4081 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4083 return bus
->trusted
;
4086 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4087 assert_return(bus
, -EINVAL
);
4088 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4089 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4091 return bus
->is_monitor
;
4094 static void flush_close(sd_bus
*bus
) {
4098 /* Flushes and closes the specified bus. We take a ref before,
4099 * to ensure the flushing does not cause the bus to be
4102 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4105 _public_
void sd_bus_default_flush_close(void) {
4106 flush_close(default_starter_bus
);
4107 flush_close(default_user_bus
);
4108 flush_close(default_system_bus
);
4111 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4112 assert_return(bus
, -EINVAL
);
4113 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4115 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4116 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4117 * from the client side. */
4118 bus
->exit_on_disconnect
= b
;
4120 /* If the exit condition was triggered already, exit immediately. */
4121 return bus_exit_now(bus
);
4124 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4125 assert_return(bus
, -EINVAL
);
4126 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4128 return bus
->exit_on_disconnect
;
4131 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4132 assert_return(bus
, -EINVAL
);
4133 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4134 assert_return(!bus
->bus_client
, -EPERM
);
4135 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4137 return free_and_strdup(&bus
->patch_sender
, sender
);
4140 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4141 assert_return(bus
, -EINVAL
);
4142 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4143 assert_return(ret
, -EINVAL
);
4145 if (!bus
->patch_sender
)
4148 *ret
= bus
->patch_sender
;
4152 _public_
int sd_bus_get_n_queued_read(sd_bus
*bus
, uint64_t *ret
) {
4153 assert_return(bus
, -EINVAL
);
4154 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4155 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4156 assert_return(ret
, -EINVAL
);
4158 *ret
= bus
->rqueue_size
;
4162 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4163 assert_return(bus
, -EINVAL
);
4164 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4165 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4166 assert_return(ret
, -EINVAL
);
4168 *ret
= bus
->wqueue_size
;
4172 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4173 assert_return(bus
, -EINVAL
);
4174 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4176 bus
->method_call_timeout
= usec
;
4180 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4184 assert_return(bus
, -EINVAL
);
4185 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4186 assert_return(ret
, -EINVAL
);
4188 if (bus
->method_call_timeout
!= 0) {
4189 *ret
= bus
->method_call_timeout
;
4193 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4194 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4195 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4196 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4197 *ret
= bus
->method_call_timeout
= usec
;
4201 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4205 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4206 assert_return(bus
, -EINVAL
);
4207 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4209 bus
->close_on_exit
= b
;
4213 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4214 assert_return(bus
, -EINVAL
);
4215 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4217 return bus
->close_on_exit
;
4220 _public_
int sd_bus_enqueue_for_read(sd_bus
*bus
, sd_bus_message
*m
) {
4223 assert_return(bus
, -EINVAL
);
4224 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4225 assert_return(m
, -EINVAL
);
4226 assert_return(m
->sealed
, -EINVAL
);
4227 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4229 if (!BUS_IS_OPEN(bus
->state
))
4232 /* Re-enqueue a message for reading. This is primarily useful for PolicyKit-style authentication,
4233 * where we accept a message, then determine we need to interactively authenticate the user, and then
4234 * we want to process the message again. */
4236 r
= bus_rqueue_make_room(bus
);
4240 bus
->rqueue
[bus
->rqueue_size
++] = bus_message_ref_queued(m
, bus
);
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