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
) {
508 static const char * const table
[_BUS_STATE_MAX
] = {
509 [BUS_UNSET
] = "UNSET",
510 [BUS_WATCH_BIND
] = "WATCH_BIND",
511 [BUS_OPENING
] = "OPENING",
512 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
513 [BUS_HELLO
] = "HELLO",
514 [BUS_RUNNING
] = "RUNNING",
515 [BUS_CLOSING
] = "CLOSING",
516 [BUS_CLOSED
] = "CLOSED",
520 assert(state
< _BUS_STATE_MAX
);
522 if (state
== bus
->state
)
525 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
529 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
537 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
539 r
= sd_bus_message_get_errno(reply
);
545 r
= sd_bus_message_read(reply
, "s", &s
);
549 if (!service_name_is_valid(s
) || s
[0] != ':') {
554 r
= free_and_strdup(&bus
->unique_name
, s
);
558 if (bus
->state
== BUS_HELLO
) {
559 bus_set_state(bus
, BUS_RUNNING
);
561 r
= synthesize_connected_signal(bus
);
569 /* When Hello() failed, let's propagate this in two ways: first we return the error immediately here,
570 * which is the propagated up towards the event loop. Let's also invalidate the connection, so that
571 * if the user then calls back into us again we won't wait any longer. */
573 bus_set_state(bus
, BUS_CLOSING
);
577 static int bus_send_hello(sd_bus
*bus
) {
578 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
583 if (!bus
->bus_client
)
586 r
= sd_bus_message_new_method_call(
589 "org.freedesktop.DBus",
590 "/org/freedesktop/DBus",
591 "org.freedesktop.DBus",
596 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
599 int bus_start_running(sd_bus
*bus
) {
600 struct reply_callback
*c
;
606 assert(bus
->state
< BUS_HELLO
);
608 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
609 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
610 * adding a fixed value to all entries should not alter the internal order. */
612 n
= now(CLOCK_MONOTONIC
);
613 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
614 if (c
->timeout_usec
== 0)
617 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
620 if (bus
->bus_client
) {
621 bus_set_state(bus
, BUS_HELLO
);
625 bus_set_state(bus
, BUS_RUNNING
);
627 r
= synthesize_connected_signal(bus
);
634 static int parse_address_key(const char **p
, const char *key
, char **value
) {
635 size_t l
, n
= 0, allocated
= 0;
636 _cleanup_free_
char *r
= NULL
;
645 if (strncmp(*p
, key
, l
) != 0)
658 while (!IN_SET(*a
, ';', ',', 0)) {
672 c
= (char) ((x
<< 4) | y
);
679 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
697 free_and_replace(*value
, r
);
702 static void skip_address_key(const char **p
) {
706 *p
+= strcspn(*p
, ",");
712 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
713 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
722 while (!IN_SET(**p
, 0, ';')) {
723 r
= parse_address_key(p
, "guid", guid
);
729 r
= parse_address_key(p
, "path", &path
);
735 r
= parse_address_key(p
, "abstract", &abstract
);
744 if (!path
&& !abstract
)
747 if (path
&& abstract
)
752 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
755 b
->sockaddr
.un
= (struct sockaddr_un
) {
756 .sun_family
= AF_UNIX
,
759 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
760 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
765 l
= strlen(abstract
);
766 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
769 b
->sockaddr
.un
= (struct sockaddr_un
) {
770 .sun_family
= AF_UNIX
,
773 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
774 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
782 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
783 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
785 struct addrinfo
*result
, hints
= {
786 .ai_socktype
= SOCK_STREAM
,
787 .ai_flags
= AI_ADDRCONFIG
,
795 while (!IN_SET(**p
, 0, ';')) {
796 r
= parse_address_key(p
, "guid", guid
);
802 r
= parse_address_key(p
, "host", &host
);
808 r
= parse_address_key(p
, "port", &port
);
814 r
= parse_address_key(p
, "family", &family
);
827 if (streq(family
, "ipv4"))
828 hints
.ai_family
= AF_INET
;
829 else if (streq(family
, "ipv6"))
830 hints
.ai_family
= AF_INET6
;
835 r
= getaddrinfo(host
, port
, &hints
, &result
);
839 return -EADDRNOTAVAIL
;
841 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
842 b
->sockaddr_size
= result
->ai_addrlen
;
844 freeaddrinfo(result
);
851 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
853 unsigned n_argv
= 0, j
;
855 size_t allocated
= 0;
863 while (!IN_SET(**p
, 0, ';')) {
864 r
= parse_address_key(p
, "guid", guid
);
870 r
= parse_address_key(p
, "path", &path
);
876 if (startswith(*p
, "argv")) {
880 ul
= strtoul(*p
+ 4, (char**) p
, 10);
881 if (errno
> 0 || **p
!= '=' || ul
> 256) {
889 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
897 r
= parse_address_key(p
, NULL
, argv
+ ul
);
912 /* Make sure there are no holes in the array, with the
913 * exception of argv[0] */
914 for (j
= 1; j
< n_argv
; j
++)
920 if (argv
&& argv
[0] == NULL
) {
921 argv
[0] = strdup(path
);
936 for (j
= 0; j
< n_argv
; j
++)
944 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
945 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
953 while (!IN_SET(**p
, 0, ';')) {
954 r
= parse_address_key(p
, "guid", guid
);
960 r
= parse_address_key(p
, "machine", &machine
);
966 r
= parse_address_key(p
, "pid", &pid
);
975 if (!machine
== !pid
)
979 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
982 free_and_replace(b
->machine
, machine
);
984 b
->machine
= mfree(b
->machine
);
988 r
= parse_pid(pid
, &b
->nspid
);
994 b
->sockaddr
.un
= (struct sockaddr_un
) {
995 .sun_family
= AF_UNIX
,
996 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
997 .sun_path
= "/var/run/dbus/system_bus_socket",
999 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
1000 b
->is_local
= false;
1005 static void bus_reset_parsed_address(sd_bus
*b
) {
1009 b
->sockaddr_size
= 0;
1010 b
->exec_argv
= strv_free(b
->exec_argv
);
1011 b
->exec_path
= mfree(b
->exec_path
);
1012 b
->server_id
= SD_ID128_NULL
;
1013 b
->machine
= mfree(b
->machine
);
1017 static int bus_parse_next_address(sd_bus
*b
) {
1018 _cleanup_free_
char *guid
= NULL
;
1026 if (b
->address
[b
->address_index
] == 0)
1029 bus_reset_parsed_address(b
);
1031 a
= b
->address
+ b
->address_index
;
1040 if (startswith(a
, "unix:")) {
1043 r
= parse_unix_address(b
, &a
, &guid
);
1048 } else if (startswith(a
, "tcp:")) {
1051 r
= parse_tcp_address(b
, &a
, &guid
);
1057 } else if (startswith(a
, "unixexec:")) {
1060 r
= parse_exec_address(b
, &a
, &guid
);
1066 } else if (startswith(a
, "x-machine-unix:")) {
1069 r
= parse_container_unix_address(b
, &a
, &guid
);
1082 r
= sd_id128_from_string(guid
, &b
->server_id
);
1087 b
->address_index
= a
- b
->address
;
1091 static void bus_kill_exec(sd_bus
*bus
) {
1092 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1093 sigterm_wait(bus
->busexec_pid
);
1094 bus
->busexec_pid
= 0;
1098 static int bus_start_address(sd_bus
*b
) {
1104 bus_close_io_fds(b
);
1105 bus_close_inotify_fd(b
);
1109 /* If you provide multiple different bus-addresses, we
1110 * try all of them in order and use the first one that
1114 r
= bus_socket_exec(b
);
1115 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1116 r
= bus_container_connect_socket(b
);
1117 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1118 r
= bus_socket_connect(b
);
1125 q
= bus_attach_io_events(b
);
1129 q
= bus_attach_inotify_event(b
);
1136 b
->last_connect_error
= -r
;
1139 r
= bus_parse_next_address(b
);
1143 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1147 int bus_next_address(sd_bus
*b
) {
1150 bus_reset_parsed_address(b
);
1151 return bus_start_address(b
);
1154 static int bus_start_fd(sd_bus
*b
) {
1159 assert(b
->input_fd
>= 0);
1160 assert(b
->output_fd
>= 0);
1162 r
= fd_nonblock(b
->input_fd
, true);
1166 r
= fd_cloexec(b
->input_fd
, true);
1170 if (b
->input_fd
!= b
->output_fd
) {
1171 r
= fd_nonblock(b
->output_fd
, true);
1175 r
= fd_cloexec(b
->output_fd
, true);
1180 if (fstat(b
->input_fd
, &st
) < 0)
1183 return bus_socket_take_fd(b
);
1186 _public_
int sd_bus_start(sd_bus
*bus
) {
1189 assert_return(bus
, -EINVAL
);
1190 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1191 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1192 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1194 bus_set_state(bus
, BUS_OPENING
);
1196 if (bus
->is_server
&& bus
->bus_client
)
1199 if (bus
->input_fd
>= 0)
1200 r
= bus_start_fd(bus
);
1201 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1202 r
= bus_start_address(bus
);
1211 return bus_send_hello(bus
);
1214 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1216 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1219 assert_return(ret
, -EINVAL
);
1221 /* Let's connect to the starter bus if it is set, and
1222 * otherwise to the bus that is appropriate for the scope
1223 * we are running in */
1225 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1227 if (streq(e
, "system"))
1228 return sd_bus_open_system_with_description(ret
, description
);
1229 else if (STR_IN_SET(e
, "session", "user"))
1230 return sd_bus_open_user_with_description(ret
, description
);
1233 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1235 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1236 return sd_bus_open_user_with_description(ret
, description
);
1238 return sd_bus_open_system_with_description(ret
, description
);
1245 r
= sd_bus_set_address(b
, e
);
1249 b
->bus_client
= true;
1251 /* We don't know whether the bus is trusted or not, so better
1252 * be safe, and authenticate everything */
1254 b
->is_local
= false;
1255 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1257 r
= sd_bus_start(b
);
1265 _public_
int sd_bus_open(sd_bus
**ret
) {
1266 return sd_bus_open_with_description(ret
, NULL
);
1269 int bus_set_address_system(sd_bus
*b
) {
1273 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1275 return sd_bus_set_address(b
, e
);
1277 return sd_bus_set_address(b
, DEFAULT_SYSTEM_BUS_ADDRESS
);
1280 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1281 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1284 assert_return(ret
, -EINVAL
);
1291 r
= sd_bus_set_description(b
, description
);
1296 r
= bus_set_address_system(b
);
1300 b
->bus_client
= true;
1301 b
->is_system
= 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 *ee
= NULL
, *s
= NULL
;
1327 e
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1329 return sd_bus_set_address(b
, e
);
1331 e
= secure_getenv("XDG_RUNTIME_DIR");
1335 ee
= bus_address_escape(e
);
1339 if (asprintf(&s
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1342 b
->address
= TAKE_PTR(s
);
1347 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1348 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1351 assert_return(ret
, -EINVAL
);
1358 r
= sd_bus_set_description(b
, description
);
1363 r
= bus_set_address_user(b
);
1367 b
->bus_client
= true;
1370 /* We don't do any per-method access control on the user bus. */
1374 r
= sd_bus_start(b
);
1382 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1383 return sd_bus_open_user_with_description(ret
, NULL
);
1386 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1387 _cleanup_free_
char *e
= NULL
;
1388 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1393 /* Skip ":"s in ipv6 addresses */
1397 rbracket
= strchr(host
, ']');
1400 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1401 e
= bus_address_escape(t
);
1404 } else if ((a
= strchr(host
, '@'))) {
1405 if (*(a
+ 1) == '[') {
1406 _cleanup_free_
char *t
= NULL
;
1408 rbracket
= strchr(a
+ 1, ']');
1411 t
= new0(char, strlen(host
));
1414 strncat(t
, host
, a
- host
+ 1);
1415 strncat(t
, a
+ 2, rbracket
- a
- 2);
1416 e
= bus_address_escape(t
);
1419 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1423 /* Let's see if a port was given */
1424 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1427 bool got_forward_slash
= false;
1433 p
= strndupa(p
, t
- p
);
1434 got_forward_slash
= true;
1437 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1438 if (!machine_name_is_valid(p
) || got_forward_slash
)
1442 goto interpret_port_as_machine_old_syntax
;
1446 /* Let's see if a machine was given */
1447 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1450 interpret_port_as_machine_old_syntax
:
1451 /* Let's make sure this is not a port of some kind,
1452 * and is a valid machine name. */
1453 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1454 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1460 t
= strndupa(host
, strcspn(host
, ":/"));
1462 e
= bus_address_escape(t
);
1467 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1468 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1469 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1473 return free_and_replace(b
->address
, a
);
1476 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1477 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1480 assert_return(host
, -EINVAL
);
1481 assert_return(ret
, -EINVAL
);
1487 r
= bus_set_address_system_remote(b
, host
);
1491 b
->bus_client
= true;
1493 b
->is_system
= true;
1494 b
->is_local
= false;
1496 r
= sd_bus_start(b
);
1504 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1505 _cleanup_free_
char *e
= NULL
;
1511 e
= bus_address_escape(machine
);
1515 a
= strjoin("x-machine-unix:machine=", e
);
1519 return free_and_replace(b
->address
, a
);
1522 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1523 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1526 assert_return(machine
, -EINVAL
);
1527 assert_return(ret
, -EINVAL
);
1528 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1534 r
= bus_set_address_system_machine(b
, machine
);
1538 b
->bus_client
= true;
1540 b
->is_system
= true;
1541 b
->is_local
= false;
1543 r
= sd_bus_start(b
);
1551 _public_
void sd_bus_close(sd_bus
*bus
) {
1554 if (bus
->state
== BUS_CLOSED
)
1556 if (bus_pid_changed(bus
))
1559 /* Don't leave ssh hanging around */
1562 bus_set_state(bus
, BUS_CLOSED
);
1564 sd_bus_detach_event(bus
);
1566 /* Drop all queued messages so that they drop references to
1567 * the bus object and the bus may be freed */
1568 bus_reset_queues(bus
);
1570 bus_close_io_fds(bus
);
1571 bus_close_inotify_fd(bus
);
1574 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1580 return sd_bus_unref(bus
);
1583 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1587 /* Have to do this before flush() to prevent hang */
1591 return sd_bus_close_unref(bus
);
1594 void bus_enter_closing(sd_bus
*bus
) {
1597 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1600 bus_set_state(bus
, BUS_CLOSING
);
1603 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1605 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1606 assert_return(bus
, -EINVAL
);
1607 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1608 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1610 return BUS_IS_OPEN(bus
->state
);
1613 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1614 assert_return(bus
, -EINVAL
);
1615 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1616 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1618 return bus
->state
== BUS_RUNNING
;
1621 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1624 assert_return(bus
, -EINVAL
);
1625 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1626 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1627 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1629 if (bus
->is_monitor
)
1632 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1633 if (!bus
->accept_fd
)
1636 r
= bus_ensure_running(bus
);
1640 return bus
->can_fds
;
1643 return bus_type_is_valid(type
);
1646 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1649 assert_return(bus
, -EINVAL
);
1650 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1651 assert_return(id
, -EINVAL
);
1652 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1654 r
= bus_ensure_running(bus
);
1658 *id
= bus
->server_id
;
1662 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1664 static uint64_t cookie_inc(uint64_t cookie
) {
1666 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1667 if (cookie
>= UINT32_MAX
)
1668 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1669 * whether we are looping. */
1674 static int next_cookie(sd_bus
*b
) {
1675 uint64_t new_cookie
;
1679 new_cookie
= cookie_inc(b
->cookie
);
1681 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1682 * least once, but then do it thorougly. */
1683 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1686 /* Check if the cookie is currently in use. If so, pick the next one */
1687 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1688 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1691 new_cookie
= cookie_inc(new_cookie
);
1694 /* Can't fulfill request */
1699 b
->cookie
= new_cookie
;
1703 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1710 /* If we copy the same message to multiple
1711 * destinations, avoid using the same cookie
1713 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1718 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1723 if (!m
->sender
&& b
->patch_sender
) {
1724 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1733 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1736 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1737 bool remarshal
= false;
1741 /* wrong packet version */
1742 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1745 /* wrong packet endianness */
1746 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1749 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1752 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1756 /* Fake some timestamps, if they were requested, and not
1757 * already initialized */
1758 if (b
->attach_timestamp
) {
1759 if (m
->realtime
<= 0)
1760 m
->realtime
= now(CLOCK_REALTIME
);
1762 if (m
->monotonic
<= 0)
1763 m
->monotonic
= now(CLOCK_MONOTONIC
);
1766 /* The bus specification says the serial number cannot be 0,
1767 * hence let's fill something in for synthetic messages. Since
1768 * synthetic messages might have a fake sender and we don't
1769 * want to interfere with the real sender's serial numbers we
1770 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1771 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1772 * even though kdbus can do 64bit. */
1773 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1776 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1782 r
= bus_socket_write_message(bus
, m
, idx
);
1786 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1787 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",
1788 bus_message_type_to_string(m
->header
->type
),
1789 strna(sd_bus_message_get_sender(m
)),
1790 strna(sd_bus_message_get_destination(m
)),
1791 strna(sd_bus_message_get_path(m
)),
1792 strna(sd_bus_message_get_interface(m
)),
1793 strna(sd_bus_message_get_member(m
)),
1794 BUS_MESSAGE_COOKIE(m
),
1796 strna(m
->root_container
.signature
),
1797 strna(m
->error
.name
),
1798 strna(m
->error
.message
));
1803 static int dispatch_wqueue(sd_bus
*bus
) {
1807 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1809 while (bus
->wqueue_size
> 0) {
1811 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1815 /* Didn't do anything this time */
1817 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1818 /* Fully written. Let's drop the entry from
1821 * This isn't particularly optimized, but
1822 * well, this is supposed to be our worst-case
1823 * buffer only, and the socket buffer is
1824 * supposed to be our primary buffer, and if
1825 * it got full, then all bets are off
1829 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1830 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1840 static int bus_read_message(sd_bus
*bus
, bool hint_priority
, int64_t priority
) {
1843 return bus_socket_read_message(bus
);
1846 int bus_rqueue_make_room(sd_bus
*bus
) {
1849 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1852 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1858 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1860 assert(i
< bus
->rqueue_size
);
1862 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1863 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1867 static int dispatch_rqueue(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**m
) {
1872 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1874 /* Note that the priority logic is only available on kdbus,
1875 * where the rqueue is unused. We check the rqueue here
1876 * anyway, because it's simple... */
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
, hint_priority
, priority
);
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
);
1908 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1910 if (!BUS_IS_OPEN(bus
->state
))
1914 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1921 /* If the cookie number isn't kept, then we know that no reply
1923 if (!cookie
&& !m
->sealed
)
1924 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1926 r
= bus_seal_message(bus
, m
, 0);
1930 /* Remarshall if we have to. This will possibly unref the
1931 * message and place a replacement in m */
1932 r
= bus_remarshal_message(bus
, &m
);
1936 /* If this is a reply and no reply was requested, then let's
1937 * suppress this, if we can */
1941 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1944 r
= bus_write_message(bus
, m
, &idx
);
1946 if (ERRNO_IS_DISCONNECT(r
)) {
1947 bus_enter_closing(bus
);
1954 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1955 /* Wasn't fully written. So let's remember how
1956 * much was written. Note that the first entry
1957 * of the wqueue array is always allocated so
1958 * that we always can remember how much was
1960 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1961 bus
->wqueue_size
= 1;
1966 /* Just append it to the queue. */
1968 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1971 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1974 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1979 *cookie
= BUS_MESSAGE_COOKIE(m
);
1984 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1987 assert_return(m
, -EINVAL
);
1992 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1994 if (!BUS_IS_OPEN(bus
->state
))
1997 if (!streq_ptr(m
->destination
, destination
)) {
2002 r
= sd_bus_message_set_destination(m
, destination
);
2007 return sd_bus_send(bus
, m
, cookie
);
2010 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
2013 if (usec
== (uint64_t) -1)
2016 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2017 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2018 * relative timestamp, and afterwards the absolute one. */
2020 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2023 return now(CLOCK_MONOTONIC
) + usec
;
2026 static int timeout_compare(const void *a
, const void *b
) {
2027 const struct reply_callback
*x
= a
, *y
= b
;
2029 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2032 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2035 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2038 _public_
int sd_bus_call_async(
2042 sd_bus_message_handler_t callback
,
2046 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2047 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2050 assert_return(m
, -EINVAL
);
2051 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2052 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2057 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2059 if (!BUS_IS_OPEN(bus
->state
))
2062 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2063 if (!callback
&& !slot
&& !m
->sealed
)
2064 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2066 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2070 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2074 r
= bus_seal_message(bus
, m
, usec
);
2078 r
= bus_remarshal_message(bus
, &m
);
2082 if (slot
|| callback
) {
2083 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2087 s
->reply_callback
.callback
= callback
;
2089 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2090 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2092 s
->reply_callback
.cookie
= 0;
2096 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2097 if (s
->reply_callback
.timeout_usec
!= 0) {
2098 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2100 s
->reply_callback
.timeout_usec
= 0;
2106 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2117 int bus_ensure_running(sd_bus
*bus
) {
2122 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2124 if (bus
->state
== BUS_RUNNING
)
2128 r
= sd_bus_process(bus
, NULL
);
2131 if (bus
->state
== BUS_RUNNING
)
2136 r
= sd_bus_wait(bus
, (uint64_t) -1);
2142 _public_
int sd_bus_call(
2146 sd_bus_error
*error
,
2147 sd_bus_message
**reply
) {
2149 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2155 bus_assert_return(m
, -EINVAL
, error
);
2156 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2157 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2158 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2163 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2165 if (!BUS_IS_OPEN(bus
->state
)) {
2170 r
= bus_ensure_running(bus
);
2174 i
= bus
->rqueue_size
;
2176 r
= bus_seal_message(bus
, m
, usec
);
2180 r
= bus_remarshal_message(bus
, &m
);
2184 r
= sd_bus_send(bus
, m
, &cookie
);
2188 timeout
= calc_elapse(bus
, m
->timeout
);
2193 while (i
< bus
->rqueue_size
) {
2194 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2196 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2198 if (incoming
->reply_cookie
== cookie
) {
2199 /* Found a match! */
2201 rqueue_drop_one(bus
, i
);
2202 log_debug_bus_message(incoming
);
2204 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2206 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2208 *reply
= TAKE_PTR(incoming
);
2213 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2215 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2216 return sd_bus_error_copy(error
, &incoming
->error
);
2222 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2225 streq(bus
->unique_name
, incoming
->sender
)) {
2227 rqueue_drop_one(bus
, i
);
2229 /* Our own message? Somebody is trying to send its own client a message,
2230 * let's not dead-lock, let's fail immediately. */
2236 /* Try to read more, right-away */
2240 r
= bus_read_message(bus
, false, 0);
2242 if (ERRNO_IS_DISCONNECT(r
)) {
2243 bus_enter_closing(bus
);
2255 n
= now(CLOCK_MONOTONIC
);
2263 left
= (uint64_t) -1;
2265 r
= bus_poll(bus
, true, left
);
2273 r
= dispatch_wqueue(bus
);
2275 if (ERRNO_IS_DISCONNECT(r
)) {
2276 bus_enter_closing(bus
);
2285 return sd_bus_error_set_errno(error
, r
);
2288 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2290 assert_return(bus
, -EINVAL
);
2291 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2292 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2293 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2295 if (bus
->state
== BUS_CLOSED
)
2298 if (bus
->inotify_fd
>= 0)
2299 return bus
->inotify_fd
;
2301 if (bus
->input_fd
>= 0)
2302 return bus
->input_fd
;
2307 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2310 assert_return(bus
, -EINVAL
);
2311 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2312 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2314 switch (bus
->state
) {
2320 case BUS_WATCH_BIND
:
2328 case BUS_AUTHENTICATING
:
2329 if (bus_socket_auth_needs_write(bus
))
2337 if (bus
->rqueue_size
<= 0)
2339 if (bus
->wqueue_size
> 0)
2347 assert_not_reached("Unknown state");
2353 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2354 struct reply_callback
*c
;
2356 assert_return(bus
, -EINVAL
);
2357 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2358 assert_return(timeout_usec
, -EINVAL
);
2359 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2361 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2364 if (bus
->track_queue
) {
2369 switch (bus
->state
) {
2371 case BUS_AUTHENTICATING
:
2372 *timeout_usec
= bus
->auth_timeout
;
2377 if (bus
->rqueue_size
> 0) {
2382 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2384 *timeout_usec
= (uint64_t) -1;
2388 if (c
->timeout_usec
== 0) {
2389 *timeout_usec
= (uint64_t) -1;
2393 *timeout_usec
= c
->timeout_usec
;
2400 case BUS_WATCH_BIND
:
2402 *timeout_usec
= (uint64_t) -1;
2406 assert_not_reached("Unknown or unexpected stat");
2410 static int process_timeout(sd_bus
*bus
) {
2411 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2412 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2413 struct reply_callback
*c
;
2420 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2422 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2426 n
= now(CLOCK_MONOTONIC
);
2427 if (c
->timeout_usec
> n
)
2430 r
= bus_message_new_synthetic_error(
2433 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2438 m
->read_counter
= ++bus
->read_counter
;
2440 r
= bus_seal_synthetic_message(bus
, m
);
2444 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2445 c
->timeout_usec
= 0;
2447 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2450 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2452 bus
->iteration_counter
++;
2454 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2456 bus
->current_message
= m
;
2457 bus
->current_slot
= sd_bus_slot_ref(slot
);
2458 bus
->current_handler
= c
->callback
;
2459 bus
->current_userdata
= slot
->userdata
;
2460 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2461 bus
->current_userdata
= NULL
;
2462 bus
->current_handler
= NULL
;
2463 bus
->current_slot
= NULL
;
2464 bus
->current_message
= NULL
;
2467 bus_slot_disconnect(slot
, true);
2469 sd_bus_slot_unref(slot
);
2471 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2472 * and ignore the callback handler's return value. */
2476 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2479 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2483 if (bus
->state
!= BUS_HELLO
)
2486 /* Let's make sure the first message on the bus is the HELLO
2487 * reply. But note that we don't actually parse the message
2488 * here (we leave that to the usual handling), we just verify
2489 * we don't let any earlier msg through. */
2491 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2494 if (m
->reply_cookie
!= 1)
2500 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2501 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2502 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2503 struct reply_callback
*c
;
2511 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2514 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2517 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2523 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2525 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2527 /* If the reply contained a file descriptor which we
2528 * didn't want we pass an error instead. */
2530 r
= bus_message_new_synthetic_error(
2533 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2538 /* Copy over original timestamp */
2539 synthetic_reply
->realtime
= m
->realtime
;
2540 synthetic_reply
->monotonic
= m
->monotonic
;
2541 synthetic_reply
->seqnum
= m
->seqnum
;
2542 synthetic_reply
->read_counter
= m
->read_counter
;
2544 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2548 m
= synthetic_reply
;
2550 r
= sd_bus_message_rewind(m
, true);
2555 if (c
->timeout_usec
!= 0) {
2556 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2557 c
->timeout_usec
= 0;
2560 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2562 bus
->current_slot
= sd_bus_slot_ref(slot
);
2563 bus
->current_handler
= c
->callback
;
2564 bus
->current_userdata
= slot
->userdata
;
2565 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2566 bus
->current_userdata
= NULL
;
2567 bus
->current_handler
= NULL
;
2568 bus
->current_slot
= NULL
;
2571 bus_slot_disconnect(slot
, true);
2573 sd_bus_slot_unref(slot
);
2575 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2576 * ignore the callback handler's return value. */
2580 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2583 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2584 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2585 struct filter_callback
*l
;
2592 bus
->filter_callbacks_modified
= false;
2594 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2597 if (bus
->filter_callbacks_modified
)
2600 /* Don't run this more than once per iteration */
2601 if (l
->last_iteration
== bus
->iteration_counter
)
2604 l
->last_iteration
= bus
->iteration_counter
;
2606 r
= sd_bus_message_rewind(m
, true);
2610 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2612 bus
->current_slot
= sd_bus_slot_ref(slot
);
2613 bus
->current_handler
= l
->callback
;
2614 bus
->current_userdata
= slot
->userdata
;
2615 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2616 bus
->current_userdata
= NULL
;
2617 bus
->current_handler
= NULL
;
2618 bus
->current_slot
= sd_bus_slot_unref(slot
);
2620 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2626 } while (bus
->filter_callbacks_modified
);
2631 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2638 bus
->match_callbacks_modified
= false;
2640 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2644 } while (bus
->match_callbacks_modified
);
2649 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2650 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2656 if (bus
->is_monitor
)
2659 if (bus
->manual_peer_interface
)
2662 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2665 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2668 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2671 if (streq_ptr(m
->member
, "Ping"))
2672 r
= sd_bus_message_new_method_return(m
, &reply
);
2673 else if (streq_ptr(m
->member
, "GetMachineId")) {
2675 char sid
[SD_ID128_STRING_MAX
];
2677 r
= sd_id128_get_machine(&id
);
2681 r
= sd_bus_message_new_method_return(m
, &reply
);
2685 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2687 r
= sd_bus_message_new_method_errorf(
2689 SD_BUS_ERROR_UNKNOWN_METHOD
,
2690 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2695 r
= sd_bus_send(bus
, reply
, NULL
);
2702 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2706 /* If we got a message with a file descriptor which we didn't
2707 * want to accept, then let's drop it. How can this even
2708 * happen? For example, when the kernel queues a message into
2709 * an activatable names's queue which allows fds, and then is
2710 * delivered to us later even though we ourselves did not
2713 if (bus
->is_monitor
)
2722 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2723 return 1; /* just eat it up */
2725 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2728 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2734 bus
->current_message
= m
;
2735 bus
->iteration_counter
++;
2737 log_debug_bus_message(m
);
2739 r
= process_hello(bus
, m
);
2743 r
= process_reply(bus
, m
);
2747 r
= process_fd_check(bus
, m
);
2751 r
= process_filter(bus
, m
);
2755 r
= process_match(bus
, m
);
2759 r
= process_builtin(bus
, m
);
2763 r
= bus_process_object(bus
, m
);
2766 bus
->current_message
= NULL
;
2770 static int dispatch_track(sd_bus
*bus
) {
2773 if (!bus
->track_queue
)
2776 bus_track_dispatch(bus
->track_queue
);
2780 static int process_running(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2781 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2785 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2787 r
= process_timeout(bus
);
2791 r
= dispatch_wqueue(bus
);
2795 r
= dispatch_track(bus
);
2799 r
= dispatch_rqueue(bus
, hint_priority
, priority
, &m
);
2805 r
= process_message(bus
, m
);
2810 r
= sd_bus_message_rewind(m
, true);
2818 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2820 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2821 strna(sd_bus_message_get_sender(m
)),
2822 strna(sd_bus_message_get_path(m
)),
2823 strna(sd_bus_message_get_interface(m
)),
2824 strna(sd_bus_message_get_member(m
)));
2826 r
= sd_bus_reply_method_errorf(
2828 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2829 "Unknown object '%s'.", m
->path
);
2843 static int bus_exit_now(sd_bus
*bus
) {
2846 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2847 * sd_event_exit(), otherwise invokes libc exit(). */
2849 if (bus
->exited
) /* did we already exit? */
2851 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2853 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2856 bus
->exited
= true; /* never exit more than once */
2858 log_debug("Bus connection disconnected, exiting.");
2861 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2865 assert_not_reached("exit() didn't exit?");
2868 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2869 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2870 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2877 r
= bus_message_new_synthetic_error(
2880 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2885 m
->read_counter
= ++bus
->read_counter
;
2887 r
= bus_seal_synthetic_message(bus
, m
);
2891 if (c
->timeout_usec
!= 0) {
2892 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2893 c
->timeout_usec
= 0;
2896 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2899 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2901 bus
->iteration_counter
++;
2903 bus
->current_message
= m
;
2904 bus
->current_slot
= sd_bus_slot_ref(slot
);
2905 bus
->current_handler
= c
->callback
;
2906 bus
->current_userdata
= slot
->userdata
;
2907 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2908 bus
->current_userdata
= NULL
;
2909 bus
->current_handler
= NULL
;
2910 bus
->current_slot
= NULL
;
2911 bus
->current_message
= NULL
;
2914 bus_slot_disconnect(slot
, true);
2916 sd_bus_slot_unref(slot
);
2918 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2921 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2922 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2923 struct reply_callback
*c
;
2927 assert(bus
->state
== BUS_CLOSING
);
2929 /* First, fail all outstanding method calls */
2930 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2932 return process_closing_reply_callback(bus
, c
);
2934 /* Then, fake-drop all remaining bus tracking references */
2936 bus_track_close(bus
->tracks
);
2940 /* Then, synthesize a Disconnected message */
2941 r
= sd_bus_message_new_signal(
2944 "/org/freedesktop/DBus/Local",
2945 "org.freedesktop.DBus.Local",
2950 bus_message_set_sender_local(bus
, m
);
2951 m
->read_counter
= ++bus
->read_counter
;
2953 r
= bus_seal_synthetic_message(bus
, m
);
2959 bus
->current_message
= m
;
2960 bus
->iteration_counter
++;
2962 r
= process_filter(bus
, m
);
2966 r
= process_match(bus
, m
);
2970 /* Nothing else to do, exit now, if the condition holds */
2971 bus
->exit_triggered
= true;
2972 (void) bus_exit_now(bus
);
2980 bus
->current_message
= NULL
;
2985 static int bus_process_internal(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2988 /* Returns 0 when we didn't do anything. This should cause the
2989 * caller to invoke sd_bus_wait() before returning the next
2990 * time. Returns > 0 when we did something, which possibly
2991 * means *ret is filled in with an unprocessed message. */
2993 assert_return(bus
, -EINVAL
);
2994 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2995 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2997 /* We don't allow recursively invoking sd_bus_process(). */
2998 assert_return(!bus
->current_message
, -EBUSY
);
2999 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
3001 BUS_DONT_DESTROY(bus
);
3003 switch (bus
->state
) {
3011 case BUS_WATCH_BIND
:
3012 r
= bus_socket_process_watch_bind(bus
);
3016 r
= bus_socket_process_opening(bus
);
3019 case BUS_AUTHENTICATING
:
3020 r
= bus_socket_process_authenticating(bus
);
3025 r
= process_running(bus
, hint_priority
, priority
, ret
);
3029 /* This branch initializes *ret, hence we don't use the generic error checking below */
3033 return process_closing(bus
, ret
);
3036 assert_not_reached("Unknown state");
3039 if (ERRNO_IS_DISCONNECT(r
)) {
3040 bus_enter_closing(bus
);
3051 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3052 return bus_process_internal(bus
, false, 0, ret
);
3055 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3056 return bus_process_internal(bus
, true, priority
, ret
);
3059 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3060 struct pollfd p
[2] = {};
3063 usec_t m
= USEC_INFINITY
;
3067 if (bus
->state
== BUS_CLOSING
)
3070 if (!BUS_IS_OPEN(bus
->state
))
3073 if (bus
->state
== BUS_WATCH_BIND
) {
3074 assert(bus
->inotify_fd
>= 0);
3076 p
[0].events
= POLLIN
;
3077 p
[0].fd
= bus
->inotify_fd
;
3082 e
= sd_bus_get_events(bus
);
3087 /* The caller really needs some more data, he doesn't
3088 * care about what's already read, or any timeouts
3089 * except its own. */
3093 /* The caller wants to process if there's something to
3094 * process, but doesn't care otherwise */
3096 r
= sd_bus_get_timeout(bus
, &until
);
3100 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3103 p
[0].fd
= bus
->input_fd
;
3104 if (bus
->output_fd
== bus
->input_fd
) {
3108 p
[0].events
= e
& POLLIN
;
3109 p
[1].fd
= bus
->output_fd
;
3110 p
[1].events
= e
& POLLOUT
;
3115 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3118 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3122 return r
> 0 ? 1 : 0;
3125 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
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 if (bus
->rqueue_size
> 0)
3140 return bus_poll(bus
, false, timeout_usec
);
3143 _public_
int sd_bus_flush(sd_bus
*bus
) {
3146 assert_return(bus
, -EINVAL
);
3147 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3148 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3150 if (bus
->state
== BUS_CLOSING
)
3153 if (!BUS_IS_OPEN(bus
->state
))
3156 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3157 if (bus
->state
== BUS_WATCH_BIND
)
3160 r
= bus_ensure_running(bus
);
3164 if (bus
->wqueue_size
<= 0)
3168 r
= dispatch_wqueue(bus
);
3170 if (ERRNO_IS_DISCONNECT(r
)) {
3171 bus_enter_closing(bus
);
3178 if (bus
->wqueue_size
<= 0)
3181 r
= bus_poll(bus
, false, (uint64_t) -1);
3187 _public_
int sd_bus_add_filter(
3190 sd_bus_message_handler_t callback
,
3195 assert_return(bus
, -EINVAL
);
3196 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3197 assert_return(callback
, -EINVAL
);
3198 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3200 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3204 s
->filter_callback
.callback
= callback
;
3206 bus
->filter_callbacks_modified
= true;
3207 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3215 static int add_match_callback(
3218 sd_bus_error
*ret_error
) {
3220 sd_bus_slot
*match_slot
= userdata
;
3221 bool failed
= false;
3227 sd_bus_slot_ref(match_slot
);
3229 if (sd_bus_message_is_method_error(m
, NULL
)) {
3230 log_debug_errno(sd_bus_message_get_errno(m
),
3231 "Unable to add match %s, failing connection: %s",
3232 match_slot
->match_callback
.match_string
,
3233 sd_bus_message_get_error(m
)->message
);
3237 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3239 if (match_slot
->match_callback
.install_callback
) {
3242 bus
= sd_bus_message_get_bus(m
);
3244 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3245 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3248 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3249 assert(bus
->current_handler
== add_match_callback
);
3250 assert(bus
->current_userdata
== userdata
);
3252 bus
->current_slot
= match_slot
;
3253 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3254 bus
->current_userdata
= match_slot
->userdata
;
3256 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3258 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3259 bus
->current_handler
= add_match_callback
;
3260 bus
->current_userdata
= userdata
;
3262 if (failed
) /* Generic failure handling: destroy the connection */
3263 bus_enter_closing(sd_bus_message_get_bus(m
));
3268 /* We don't need the install method reply slot anymore, let's free it */
3269 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3271 if (failed
&& match_slot
->floating
)
3272 bus_slot_disconnect(match_slot
, true);
3274 sd_bus_slot_unref(match_slot
);
3279 static int bus_add_match_full(
3284 sd_bus_message_handler_t callback
,
3285 sd_bus_message_handler_t install_callback
,
3288 struct bus_match_component
*components
= NULL
;
3289 unsigned n_components
= 0;
3290 sd_bus_slot
*s
= NULL
;
3293 assert_return(bus
, -EINVAL
);
3294 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3295 assert_return(match
, -EINVAL
);
3296 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3298 r
= bus_match_parse(match
, &components
, &n_components
);
3302 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3308 s
->match_callback
.callback
= callback
;
3309 s
->match_callback
.install_callback
= install_callback
;
3311 if (bus
->bus_client
) {
3312 enum bus_match_scope scope
;
3314 scope
= bus_match_get_scope(components
, n_components
);
3316 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3317 if (scope
!= BUS_MATCH_LOCAL
) {
3319 /* We store the original match string, so that we can use it to remove the match again. */
3321 s
->match_callback
.match_string
= strdup(match
);
3322 if (!s
->match_callback
.match_string
) {
3328 r
= bus_add_match_internal_async(bus
,
3329 &s
->match_callback
.install_slot
,
3330 s
->match_callback
.match_string
,
3337 /* Make the slot of the match call floating now. We need the reference, but we don't
3338 * want that this match pins the bus object, hence we first create it non-floating, but
3339 * then make it floating. */
3340 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3342 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
, &s
->match_callback
.after
);
3346 s
->match_added
= true;
3350 bus
->match_callbacks_modified
= true;
3351 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3360 bus_match_parse_free(components
, n_components
);
3361 sd_bus_slot_unref(s
);
3366 _public_
int sd_bus_add_match(
3370 sd_bus_message_handler_t callback
,
3373 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3376 _public_
int sd_bus_add_match_async(
3380 sd_bus_message_handler_t callback
,
3381 sd_bus_message_handler_t install_callback
,
3384 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3387 bool bus_pid_changed(sd_bus
*bus
) {
3390 /* We don't support people creating a bus connection and
3391 * keeping it around over a fork(). Let's complain. */
3393 return bus
->original_pid
!= getpid_cached();
3396 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3397 sd_bus
*bus
= userdata
;
3402 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3404 r
= sd_bus_process(bus
, NULL
);
3406 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3407 bus_enter_closing(bus
);
3413 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3414 sd_bus
*bus
= userdata
;
3419 r
= sd_bus_process(bus
, NULL
);
3421 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3422 bus_enter_closing(bus
);
3428 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3429 sd_bus
*bus
= userdata
;
3436 e
= sd_bus_get_events(bus
);
3442 if (bus
->output_fd
!= bus
->input_fd
) {
3444 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3448 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3450 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3454 r
= sd_bus_get_timeout(bus
, &until
);
3460 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3467 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3474 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3475 bus_enter_closing(bus
);
3480 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3481 sd_bus
*bus
= userdata
;
3485 if (bus
->close_on_exit
) {
3493 int bus_attach_io_events(sd_bus
*bus
) {
3498 if (bus
->input_fd
< 0)
3504 if (!bus
->input_io_event_source
) {
3505 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3509 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3513 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3517 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3519 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3524 if (bus
->output_fd
!= bus
->input_fd
) {
3525 assert(bus
->output_fd
>= 0);
3527 if (!bus
->output_io_event_source
) {
3528 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3532 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3536 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3538 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3547 static void bus_detach_io_events(sd_bus
*bus
) {
3550 if (bus
->input_io_event_source
) {
3551 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3552 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3555 if (bus
->output_io_event_source
) {
3556 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3557 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3561 int bus_attach_inotify_event(sd_bus
*bus
) {
3566 if (bus
->inotify_fd
< 0)
3572 if (!bus
->inotify_event_source
) {
3573 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3577 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3581 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3583 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3590 static void bus_detach_inotify_event(sd_bus
*bus
) {
3593 if (bus
->inotify_event_source
) {
3594 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3595 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3599 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3602 assert_return(bus
, -EINVAL
);
3603 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3604 assert_return(!bus
->event
, -EBUSY
);
3606 assert(!bus
->input_io_event_source
);
3607 assert(!bus
->output_io_event_source
);
3608 assert(!bus
->time_event_source
);
3611 bus
->event
= sd_event_ref(event
);
3613 r
= sd_event_default(&bus
->event
);
3618 bus
->event_priority
= priority
;
3620 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3624 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3628 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3632 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3636 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3640 r
= bus_attach_io_events(bus
);
3644 r
= bus_attach_inotify_event(bus
);
3651 sd_bus_detach_event(bus
);
3655 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3656 assert_return(bus
, -EINVAL
);
3657 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3662 bus_detach_io_events(bus
);
3663 bus_detach_inotify_event(bus
);
3665 if (bus
->time_event_source
) {
3666 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3667 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3670 if (bus
->quit_event_source
) {
3671 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3672 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3675 bus
->event
= sd_event_unref(bus
->event
);
3679 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3680 assert_return(bus
, NULL
);
3685 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3686 assert_return(bus
, NULL
);
3688 return bus
->current_message
;
3691 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3692 assert_return(bus
, NULL
);
3694 return bus
->current_slot
;
3697 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3698 assert_return(bus
, NULL
);
3700 return bus
->current_handler
;
3703 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3704 assert_return(bus
, NULL
);
3706 return bus
->current_userdata
;
3709 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3714 assert(default_bus
);
3717 return !!*default_bus
;
3720 *ret
= sd_bus_ref(*default_bus
);
3728 b
->default_bus_ptr
= default_bus
;
3736 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3737 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3740 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3741 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3744 _public_
int sd_bus_default(sd_bus
**ret
) {
3745 int (*bus_open
)(sd_bus
**) = NULL
;
3748 busp
= bus_choose_default(&bus_open
);
3749 return bus_default(bus_open
, busp
, ret
);
3752 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3753 assert_return(b
, -EINVAL
);
3754 assert_return(tid
, -EINVAL
);
3755 assert_return(!bus_pid_changed(b
), -ECHILD
);
3763 return sd_event_get_tid(b
->event
, tid
);
3768 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3769 _cleanup_free_
char *e
= NULL
;
3772 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3773 assert_return(external_id
, -EINVAL
);
3774 assert_return(ret_path
, -EINVAL
);
3776 e
= bus_label_escape(external_id
);
3780 ret
= path_join(prefix
, e
);
3788 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3792 assert_return(object_path_is_valid(path
), -EINVAL
);
3793 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3794 assert_return(external_id
, -EINVAL
);
3796 e
= object_path_startswith(path
, prefix
);
3798 *external_id
= NULL
;
3802 ret
= bus_label_unescape(e
);
3810 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3811 _cleanup_strv_free_
char **labels
= NULL
;
3812 char *path
, *path_pos
, **label_pos
;
3813 const char *sep
, *template_pos
;
3818 assert_return(out
, -EINVAL
);
3819 assert_return(path_template
, -EINVAL
);
3821 path_length
= strlen(path_template
);
3823 va_start(list
, path_template
);
3824 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3828 arg
= va_arg(list
, const char *);
3834 label
= bus_label_escape(arg
);
3840 r
= strv_consume(&labels
, label
);
3846 /* add label length, but account for the format character */
3847 path_length
+= strlen(label
) - 1;
3851 path
= malloc(path_length
+ 1);
3858 for (template_pos
= path_template
; *template_pos
; ) {
3859 sep
= strchrnul(template_pos
, '%');
3860 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3864 path_pos
= stpcpy(path_pos
, *label_pos
++);
3865 template_pos
= sep
+ 1;
3873 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3874 _cleanup_strv_free_
char **labels
= NULL
;
3875 const char *template_pos
, *path_pos
;
3881 * This decodes an object-path based on a template argument. The
3882 * template consists of a verbatim path, optionally including special
3885 * - Each occurrence of '%' in the template matches an arbitrary
3886 * substring of a label in the given path. At most one such
3887 * directive is allowed per label. For each such directive, the
3888 * caller must provide an output parameter (char **) via va_arg. If
3889 * NULL is passed, the given label is verified, but not returned.
3890 * For each matched label, the *decoded* label is stored in the
3891 * passed output argument, and the caller is responsible to free
3892 * it. Note that the output arguments are only modified if the
3893 * actually path matched the template. Otherwise, they're left
3896 * This function returns <0 on error, 0 if the path does not match the
3897 * template, 1 if it matched.
3900 assert_return(path
, -EINVAL
);
3901 assert_return(path_template
, -EINVAL
);
3905 for (template_pos
= path_template
; *template_pos
; ) {
3910 /* verify everything until the next '%' matches verbatim */
3911 sep
= strchrnul(template_pos
, '%');
3912 length
= sep
- template_pos
;
3913 if (strncmp(path_pos
, template_pos
, length
))
3917 template_pos
+= length
;
3922 /* We found the next '%' character. Everything up until here
3923 * matched. We now skip ahead to the end of this label and make
3924 * sure it matches the tail of the label in the path. Then we
3925 * decode the string in-between and save it for later use. */
3927 ++template_pos
; /* skip over '%' */
3929 sep
= strchrnul(template_pos
, '/');
3930 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3932 /* verify the suffixes match */
3933 sep
= strchrnul(path_pos
, '/');
3934 if (sep
- path_pos
< (ssize_t
)length
||
3935 strncmp(sep
- length
, template_pos
, length
))
3938 template_pos
+= length
; /* skip over matched label */
3939 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3941 /* store unescaped label for later use */
3942 label
= bus_label_unescape_n(path_pos
, length
);
3946 r
= strv_consume(&labels
, label
);
3950 path_pos
= sep
; /* skip decoded label and suffix */
3953 /* end of template must match end of path */
3957 /* copy the labels over to the caller */
3958 va_start(list
, path_template
);
3959 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3962 arg
= va_arg(list
, char **);
3970 labels
= mfree(labels
);
3974 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3975 assert_return(bus
, -EINVAL
);
3976 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3977 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3982 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3983 assert_return(bus
, -EINVAL
);
3984 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3985 assert_return(description
, -EINVAL
);
3986 assert_return(bus
->description
, -ENXIO
);
3987 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3989 if (bus
->description
)
3990 *description
= bus
->description
;
3991 else if (bus
->is_system
)
3992 *description
= "system";
3993 else if (bus
->is_user
)
3994 *description
= "user";
3996 *description
= NULL
;
4001 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
4002 assert_return(bus
, -EINVAL
);
4003 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4004 assert_return(scope
, -EINVAL
);
4005 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4012 if (bus
->is_system
) {
4020 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4022 assert_return(bus
, -EINVAL
);
4023 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4024 assert_return(address
, -EINVAL
);
4025 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4028 *address
= bus
->address
;
4035 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4036 assert_return(bus
, -EINVAL
);
4037 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4038 assert_return(mask
, -EINVAL
);
4039 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4041 *mask
= bus
->creds_mask
;
4045 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4046 assert_return(bus
, -EINVAL
);
4047 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4048 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4050 return bus
->bus_client
;
4053 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4054 assert_return(bus
, -EINVAL
);
4055 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4056 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4058 return bus
->is_server
;
4061 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4062 assert_return(bus
, -EINVAL
);
4063 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4064 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4066 return bus
->anonymous_auth
;
4069 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4070 assert_return(bus
, -EINVAL
);
4071 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4072 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4074 return bus
->trusted
;
4077 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4078 assert_return(bus
, -EINVAL
);
4079 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4080 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4082 return bus
->is_monitor
;
4085 static void flush_close(sd_bus
*bus
) {
4089 /* Flushes and closes the specified bus. We take a ref before,
4090 * to ensure the flushing does not cause the bus to be
4093 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4096 _public_
void sd_bus_default_flush_close(void) {
4097 flush_close(default_starter_bus
);
4098 flush_close(default_user_bus
);
4099 flush_close(default_system_bus
);
4102 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4103 assert_return(bus
, -EINVAL
);
4104 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4106 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4107 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4108 * from the client side. */
4109 bus
->exit_on_disconnect
= b
;
4111 /* If the exit condition was triggered already, exit immediately. */
4112 return bus_exit_now(bus
);
4115 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4116 assert_return(bus
, -EINVAL
);
4117 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4119 return bus
->exit_on_disconnect
;
4122 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4123 assert_return(bus
, -EINVAL
);
4124 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4125 assert_return(!bus
->bus_client
, -EPERM
);
4126 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4128 return free_and_strdup(&bus
->patch_sender
, sender
);
4131 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4132 assert_return(bus
, -EINVAL
);
4133 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4134 assert_return(ret
, -EINVAL
);
4136 if (!bus
->patch_sender
)
4139 *ret
= bus
->patch_sender
;
4143 _public_
int sd_bus_get_n_queued_read(sd_bus
*bus
, uint64_t *ret
) {
4144 assert_return(bus
, -EINVAL
);
4145 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4146 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4147 assert_return(ret
, -EINVAL
);
4149 *ret
= bus
->rqueue_size
;
4153 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4154 assert_return(bus
, -EINVAL
);
4155 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4156 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4157 assert_return(ret
, -EINVAL
);
4159 *ret
= bus
->wqueue_size
;
4163 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4164 assert_return(bus
, -EINVAL
);
4165 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4167 bus
->method_call_timeout
= usec
;
4171 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4175 assert_return(bus
, -EINVAL
);
4176 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4177 assert_return(ret
, -EINVAL
);
4179 if (bus
->method_call_timeout
!= 0) {
4180 *ret
= bus
->method_call_timeout
;
4184 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4185 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4186 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4187 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4188 *ret
= bus
->method_call_timeout
= usec
;
4192 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4196 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4197 assert_return(bus
, -EINVAL
);
4198 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4200 bus
->close_on_exit
= b
;
4204 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4205 assert_return(bus
, -EINVAL
);
4206 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4208 return bus
->close_on_exit
;
4211 _public_
int sd_bus_enqueue_for_read(sd_bus
*bus
, sd_bus_message
*m
) {
4214 assert_return(bus
, -EINVAL
);
4215 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4216 assert_return(m
, -EINVAL
);
4217 assert_return(m
->sealed
, -EINVAL
);
4218 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4220 if (!BUS_IS_OPEN(bus
->state
))
4223 /* Re-enqueue a message for reading. This is primarily useful for PolicyKit-style authentication,
4224 * where we accept a message, then determine we need to interactively authenticate the user, and then
4225 * we want to process the message again. */
4227 r
= bus_rqueue_make_room(bus
);
4231 bus
->rqueue
[bus
->rqueue_size
++] = bus_message_ref_queued(m
, bus
);