1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
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
;
604 assert(bus
->state
< BUS_HELLO
);
606 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
607 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
608 * adding a fixed value to all entries should not alter the internal order. */
610 n
= now(CLOCK_MONOTONIC
);
611 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
) {
612 if (c
->timeout_usec
== 0)
615 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
618 if (bus
->bus_client
) {
619 bus_set_state(bus
, BUS_HELLO
);
623 bus_set_state(bus
, BUS_RUNNING
);
625 r
= synthesize_connected_signal(bus
);
632 static int parse_address_key(const char **p
, const char *key
, char **value
) {
633 size_t l
, n
= 0, allocated
= 0;
634 _cleanup_free_
char *r
= NULL
;
643 if (strncmp(*p
, key
, l
) != 0)
656 while (!IN_SET(*a
, ';', ',', 0)) {
670 c
= (char) ((x
<< 4) | y
);
677 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
695 free_and_replace(*value
, r
);
700 static void skip_address_key(const char **p
) {
704 *p
+= strcspn(*p
, ",");
710 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
711 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
720 while (!IN_SET(**p
, 0, ';')) {
721 r
= parse_address_key(p
, "guid", guid
);
727 r
= parse_address_key(p
, "path", &path
);
733 r
= parse_address_key(p
, "abstract", &abstract
);
742 if (!path
&& !abstract
)
745 if (path
&& abstract
)
750 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
753 b
->sockaddr
.un
= (struct sockaddr_un
) {
754 .sun_family
= AF_UNIX
,
757 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
758 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
763 l
= strlen(abstract
);
764 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
767 b
->sockaddr
.un
= (struct sockaddr_un
) {
768 .sun_family
= AF_UNIX
,
771 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
772 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
780 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
781 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
783 struct addrinfo
*result
, hints
= {
784 .ai_socktype
= SOCK_STREAM
,
792 while (!IN_SET(**p
, 0, ';')) {
793 r
= parse_address_key(p
, "guid", guid
);
799 r
= parse_address_key(p
, "host", &host
);
805 r
= parse_address_key(p
, "port", &port
);
811 r
= parse_address_key(p
, "family", &family
);
824 if (streq(family
, "ipv4"))
825 hints
.ai_family
= AF_INET
;
826 else if (streq(family
, "ipv6"))
827 hints
.ai_family
= AF_INET6
;
832 r
= getaddrinfo(host
, port
, &hints
, &result
);
836 return -EADDRNOTAVAIL
;
838 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
839 b
->sockaddr_size
= result
->ai_addrlen
;
841 freeaddrinfo(result
);
848 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
850 unsigned n_argv
= 0, j
;
852 size_t allocated
= 0;
860 while (!IN_SET(**p
, 0, ';')) {
861 r
= parse_address_key(p
, "guid", guid
);
867 r
= parse_address_key(p
, "path", &path
);
873 if (startswith(*p
, "argv")) {
877 ul
= strtoul(*p
+ 4, (char**) p
, 10);
878 if (errno
> 0 || **p
!= '=' || ul
> 256) {
886 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
894 r
= parse_address_key(p
, NULL
, argv
+ ul
);
909 /* Make sure there are no holes in the array, with the
910 * exception of argv[0] */
911 for (j
= 1; j
< n_argv
; j
++)
917 if (argv
&& argv
[0] == NULL
) {
918 argv
[0] = strdup(path
);
933 for (j
= 0; j
< n_argv
; j
++)
941 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
942 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
950 while (!IN_SET(**p
, 0, ';')) {
951 r
= parse_address_key(p
, "guid", guid
);
957 r
= parse_address_key(p
, "machine", &machine
);
963 r
= parse_address_key(p
, "pid", &pid
);
972 if (!machine
== !pid
)
976 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
979 free_and_replace(b
->machine
, machine
);
981 b
->machine
= mfree(b
->machine
);
984 r
= parse_pid(pid
, &b
->nspid
);
990 b
->sockaddr
.un
= (struct sockaddr_un
) {
991 .sun_family
= AF_UNIX
,
992 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
993 .sun_path
= "/var/run/dbus/system_bus_socket",
995 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
1001 static void bus_reset_parsed_address(sd_bus
*b
) {
1005 b
->sockaddr_size
= 0;
1006 b
->exec_argv
= strv_free(b
->exec_argv
);
1007 b
->exec_path
= mfree(b
->exec_path
);
1008 b
->server_id
= SD_ID128_NULL
;
1009 b
->machine
= mfree(b
->machine
);
1013 static int bus_parse_next_address(sd_bus
*b
) {
1014 _cleanup_free_
char *guid
= NULL
;
1022 if (b
->address
[b
->address_index
] == 0)
1025 bus_reset_parsed_address(b
);
1027 a
= b
->address
+ b
->address_index
;
1036 if (startswith(a
, "unix:")) {
1039 r
= parse_unix_address(b
, &a
, &guid
);
1044 } else if (startswith(a
, "tcp:")) {
1047 r
= parse_tcp_address(b
, &a
, &guid
);
1053 } else if (startswith(a
, "unixexec:")) {
1056 r
= parse_exec_address(b
, &a
, &guid
);
1062 } else if (startswith(a
, "x-machine-unix:")) {
1065 r
= parse_container_unix_address(b
, &a
, &guid
);
1078 r
= sd_id128_from_string(guid
, &b
->server_id
);
1083 b
->address_index
= a
- b
->address
;
1087 static void bus_kill_exec(sd_bus
*bus
) {
1088 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1089 sigterm_wait(bus
->busexec_pid
);
1090 bus
->busexec_pid
= 0;
1094 static int bus_start_address(sd_bus
*b
) {
1100 bus_close_io_fds(b
);
1101 bus_close_inotify_fd(b
);
1105 /* If you provide multiple different bus-addresses, we
1106 * try all of them in order and use the first one that
1110 r
= bus_socket_exec(b
);
1111 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1112 r
= bus_container_connect_socket(b
);
1113 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1114 r
= bus_socket_connect(b
);
1121 q
= bus_attach_io_events(b
);
1125 q
= bus_attach_inotify_event(b
);
1132 b
->last_connect_error
= -r
;
1135 r
= bus_parse_next_address(b
);
1139 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1143 int bus_next_address(sd_bus
*b
) {
1146 bus_reset_parsed_address(b
);
1147 return bus_start_address(b
);
1150 static int bus_start_fd(sd_bus
*b
) {
1155 assert(b
->input_fd
>= 0);
1156 assert(b
->output_fd
>= 0);
1158 if (DEBUG_LOGGING
) {
1159 _cleanup_free_
char *pi
= NULL
, *po
= NULL
;
1160 (void) fd_get_path(b
->input_fd
, &pi
);
1161 (void) fd_get_path(b
->output_fd
, &po
);
1162 log_debug("sd-bus: starting bus%s%s on fds %d/%d (%s, %s)...",
1163 b
->description
? " " : "", strempty(b
->description
),
1164 b
->input_fd
, b
->output_fd
,
1165 pi
?: "???", po
?: "???");
1168 r
= fd_nonblock(b
->input_fd
, true);
1172 r
= fd_cloexec(b
->input_fd
, true);
1176 if (b
->input_fd
!= b
->output_fd
) {
1177 r
= fd_nonblock(b
->output_fd
, true);
1181 r
= fd_cloexec(b
->output_fd
, true);
1186 if (fstat(b
->input_fd
, &st
) < 0)
1189 return bus_socket_take_fd(b
);
1192 _public_
int sd_bus_start(sd_bus
*bus
) {
1195 assert_return(bus
, -EINVAL
);
1196 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1197 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1198 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1200 bus_set_state(bus
, BUS_OPENING
);
1202 if (bus
->is_server
&& bus
->bus_client
)
1205 if (bus
->input_fd
>= 0)
1206 r
= bus_start_fd(bus
);
1207 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1208 r
= bus_start_address(bus
);
1217 return bus_send_hello(bus
);
1220 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1222 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1225 assert_return(ret
, -EINVAL
);
1227 /* Let's connect to the starter bus if it is set, and
1228 * otherwise to the bus that is appropriate for the scope
1229 * we are running in */
1231 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1233 if (streq(e
, "system"))
1234 return sd_bus_open_system_with_description(ret
, description
);
1235 else if (STR_IN_SET(e
, "session", "user"))
1236 return sd_bus_open_user_with_description(ret
, description
);
1239 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1241 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1242 return sd_bus_open_user_with_description(ret
, description
);
1244 return sd_bus_open_system_with_description(ret
, description
);
1251 r
= sd_bus_set_address(b
, e
);
1255 b
->bus_client
= true;
1257 /* We don't know whether the bus is trusted or not, so better
1258 * be safe, and authenticate everything */
1260 b
->is_local
= false;
1261 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1263 r
= sd_bus_start(b
);
1271 _public_
int sd_bus_open(sd_bus
**ret
) {
1272 return sd_bus_open_with_description(ret
, NULL
);
1275 int bus_set_address_system(sd_bus
*b
) {
1281 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1283 r
= sd_bus_set_address(b
, e
?: DEFAULT_SYSTEM_BUS_ADDRESS
);
1285 b
->is_system
= true;
1289 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1290 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1293 assert_return(ret
, -EINVAL
);
1300 r
= sd_bus_set_description(b
, description
);
1305 r
= bus_set_address_system(b
);
1309 b
->bus_client
= true;
1311 /* Let's do per-method access control on the system bus. We
1312 * need the caller's UID and capability set for that. */
1314 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1317 r
= sd_bus_start(b
);
1325 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1326 return sd_bus_open_system_with_description(ret
, NULL
);
1329 int bus_set_address_user(sd_bus
*b
) {
1331 _cleanup_free_
char *_a
= NULL
;
1336 a
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1339 _cleanup_free_
char *ee
= NULL
;
1341 e
= secure_getenv("XDG_RUNTIME_DIR");
1343 return log_debug_errno(SYNTHETIC_ERRNO(ENOMEDIUM
),
1344 "sd-bus: $XDG_RUNTIME_DIR not set, cannot connect to user bus.");
1346 ee
= bus_address_escape(e
);
1350 if (asprintf(&_a
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1355 r
= sd_bus_set_address(b
, a
);
1361 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1362 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1365 assert_return(ret
, -EINVAL
);
1372 r
= sd_bus_set_description(b
, description
);
1377 r
= bus_set_address_user(b
);
1381 b
->bus_client
= true;
1383 /* We don't do any per-method access control on the user bus. */
1387 r
= sd_bus_start(b
);
1395 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1396 return sd_bus_open_user_with_description(ret
, NULL
);
1399 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1400 _cleanup_free_
char *e
= NULL
;
1401 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1406 /* Skip ":"s in ipv6 addresses */
1410 rbracket
= strchr(host
, ']');
1413 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1414 e
= bus_address_escape(t
);
1417 } else if ((a
= strchr(host
, '@'))) {
1418 if (*(a
+ 1) == '[') {
1419 _cleanup_free_
char *t
= NULL
;
1421 rbracket
= strchr(a
+ 1, ']');
1424 t
= new0(char, strlen(host
));
1427 strncat(t
, host
, a
- host
+ 1);
1428 strncat(t
, a
+ 2, rbracket
- a
- 2);
1429 e
= bus_address_escape(t
);
1432 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1436 /* Let's see if a port was given */
1437 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1440 bool got_forward_slash
= false;
1446 p
= strndupa(p
, t
- p
);
1447 got_forward_slash
= true;
1450 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1451 if (!machine_name_is_valid(p
) || got_forward_slash
)
1455 goto interpret_port_as_machine_old_syntax
;
1459 /* Let's see if a machine was given */
1460 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1463 interpret_port_as_machine_old_syntax
:
1464 /* Let's make sure this is not a port of some kind,
1465 * and is a valid machine name. */
1466 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1467 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1473 t
= strndupa(host
, strcspn(host
, ":/"));
1475 e
= bus_address_escape(t
);
1480 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1481 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1482 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1486 return free_and_replace(b
->address
, a
);
1489 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1490 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1493 assert_return(host
, -EINVAL
);
1494 assert_return(ret
, -EINVAL
);
1500 r
= bus_set_address_system_remote(b
, host
);
1504 b
->bus_client
= true;
1506 b
->is_system
= true;
1507 b
->is_local
= false;
1509 r
= sd_bus_start(b
);
1517 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1518 _cleanup_free_
char *e
= NULL
;
1524 e
= bus_address_escape(machine
);
1528 a
= strjoin("x-machine-unix:machine=", e
);
1532 return free_and_replace(b
->address
, a
);
1535 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1536 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1539 assert_return(machine
, -EINVAL
);
1540 assert_return(ret
, -EINVAL
);
1541 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1547 r
= bus_set_address_system_machine(b
, machine
);
1551 b
->bus_client
= true;
1553 b
->is_system
= true;
1554 b
->is_local
= false;
1556 r
= sd_bus_start(b
);
1564 _public_
void sd_bus_close(sd_bus
*bus
) {
1567 if (bus
->state
== BUS_CLOSED
)
1569 if (bus_pid_changed(bus
))
1572 /* Don't leave ssh hanging around */
1575 bus_set_state(bus
, BUS_CLOSED
);
1577 sd_bus_detach_event(bus
);
1579 /* Drop all queued messages so that they drop references to
1580 * the bus object and the bus may be freed */
1581 bus_reset_queues(bus
);
1583 bus_close_io_fds(bus
);
1584 bus_close_inotify_fd(bus
);
1587 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1593 return sd_bus_unref(bus
);
1596 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1600 /* Have to do this before flush() to prevent hang */
1604 return sd_bus_close_unref(bus
);
1607 void bus_enter_closing(sd_bus
*bus
) {
1610 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1613 bus_set_state(bus
, BUS_CLOSING
);
1616 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1618 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1619 assert_return(bus
, -EINVAL
);
1620 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1621 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1623 return BUS_IS_OPEN(bus
->state
);
1626 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1627 assert_return(bus
, -EINVAL
);
1628 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1629 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1631 return bus
->state
== BUS_RUNNING
;
1634 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1637 assert_return(bus
, -EINVAL
);
1638 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1639 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1640 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1642 if (bus
->is_monitor
)
1645 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1646 if (!bus
->accept_fd
)
1649 r
= bus_ensure_running(bus
);
1653 return bus
->can_fds
;
1656 return bus_type_is_valid(type
);
1659 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1662 assert_return(bus
, -EINVAL
);
1663 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1664 assert_return(id
, -EINVAL
);
1665 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1667 r
= bus_ensure_running(bus
);
1671 *id
= bus
->server_id
;
1675 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1677 static uint64_t cookie_inc(uint64_t cookie
) {
1679 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1680 if (cookie
>= UINT32_MAX
)
1681 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1682 * whether we are looping. */
1687 static int next_cookie(sd_bus
*b
) {
1688 uint64_t new_cookie
;
1692 new_cookie
= cookie_inc(b
->cookie
);
1694 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1695 * least once, but then do it thorougly. */
1696 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1699 /* Check if the cookie is currently in use. If so, pick the next one */
1700 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1701 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1704 new_cookie
= cookie_inc(new_cookie
);
1707 /* Can't fulfill request */
1712 b
->cookie
= new_cookie
;
1716 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1723 /* If we copy the same message to multiple
1724 * destinations, avoid using the same cookie
1726 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1731 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1736 if (!m
->sender
&& b
->patch_sender
) {
1737 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1746 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1749 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1750 bool remarshal
= false;
1754 /* wrong packet version */
1755 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1758 /* wrong packet endianness */
1759 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1762 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1765 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1769 /* Fake some timestamps, if they were requested, and not
1770 * already initialized */
1771 if (b
->attach_timestamp
) {
1772 if (m
->realtime
<= 0)
1773 m
->realtime
= now(CLOCK_REALTIME
);
1775 if (m
->monotonic
<= 0)
1776 m
->monotonic
= now(CLOCK_MONOTONIC
);
1779 /* The bus specification says the serial number cannot be 0,
1780 * hence let's fill something in for synthetic messages. Since
1781 * synthetic messages might have a fake sender and we don't
1782 * want to interfere with the real sender's serial numbers we
1783 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1784 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1785 * even though kdbus can do 64bit. */
1786 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1789 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1795 r
= bus_socket_write_message(bus
, m
, idx
);
1799 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1800 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",
1801 bus_message_type_to_string(m
->header
->type
),
1802 strna(sd_bus_message_get_sender(m
)),
1803 strna(sd_bus_message_get_destination(m
)),
1804 strna(sd_bus_message_get_path(m
)),
1805 strna(sd_bus_message_get_interface(m
)),
1806 strna(sd_bus_message_get_member(m
)),
1807 BUS_MESSAGE_COOKIE(m
),
1809 strna(m
->root_container
.signature
),
1810 strna(m
->error
.name
),
1811 strna(m
->error
.message
));
1816 static int dispatch_wqueue(sd_bus
*bus
) {
1820 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1822 while (bus
->wqueue_size
> 0) {
1824 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1828 /* Didn't do anything this time */
1830 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1831 /* Fully written. Let's drop the entry from
1834 * This isn't particularly optimized, but
1835 * well, this is supposed to be our worst-case
1836 * buffer only, and the socket buffer is
1837 * supposed to be our primary buffer, and if
1838 * it got full, then all bets are off
1842 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1843 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1853 static int bus_read_message(sd_bus
*bus
) {
1856 return bus_socket_read_message(bus
);
1859 int bus_rqueue_make_room(sd_bus
*bus
) {
1862 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1865 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1871 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1873 assert(i
< bus
->rqueue_size
);
1875 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1876 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1880 static int dispatch_rqueue(sd_bus
*bus
, sd_bus_message
**m
) {
1885 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1888 if (bus
->rqueue_size
> 0) {
1889 /* Dispatch a queued message */
1890 *m
= sd_bus_message_ref(bus
->rqueue
[0]);
1891 rqueue_drop_one(bus
, 0);
1895 /* Try to read a new message */
1896 r
= bus_read_message(bus
);
1908 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1909 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1912 assert_return(m
, -EINVAL
);
1915 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1917 assert_return(bus
= m
->bus
, -ENOTCONN
);
1918 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1920 if (!BUS_IS_OPEN(bus
->state
))
1924 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1931 /* If the cookie number isn't kept, then we know that no reply
1933 if (!cookie
&& !m
->sealed
)
1934 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1936 r
= bus_seal_message(bus
, m
, 0);
1940 /* Remarshall if we have to. This will possibly unref the
1941 * message and place a replacement in m */
1942 r
= bus_remarshal_message(bus
, &m
);
1946 /* If this is a reply and no reply was requested, then let's
1947 * suppress this, if we can */
1951 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1954 r
= bus_write_message(bus
, m
, &idx
);
1956 if (ERRNO_IS_DISCONNECT(r
)) {
1957 bus_enter_closing(bus
);
1964 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1965 /* Wasn't fully written. So let's remember how
1966 * much was written. Note that the first entry
1967 * of the wqueue array is always allocated so
1968 * that we always can remember how much was
1970 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1971 bus
->wqueue_size
= 1;
1976 /* Just append it to the queue. */
1978 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1981 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1984 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1989 *cookie
= BUS_MESSAGE_COOKIE(m
);
1994 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1997 assert_return(m
, -EINVAL
);
2000 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2002 assert_return(bus
= m
->bus
, -ENOTCONN
);
2003 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2005 if (!BUS_IS_OPEN(bus
->state
))
2008 if (!streq_ptr(m
->destination
, destination
)) {
2013 r
= sd_bus_message_set_destination(m
, destination
);
2018 return sd_bus_send(bus
, m
, cookie
);
2021 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
2024 if (usec
== (uint64_t) -1)
2027 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2028 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2029 * relative timestamp, and afterwards the absolute one. */
2031 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2034 return now(CLOCK_MONOTONIC
) + usec
;
2037 static int timeout_compare(const void *a
, const void *b
) {
2038 const struct reply_callback
*x
= a
, *y
= b
;
2040 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2043 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2046 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2049 _public_
int sd_bus_call_async(
2053 sd_bus_message_handler_t callback
,
2057 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2058 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2061 assert_return(m
, -EINVAL
);
2062 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2063 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2066 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2068 assert_return(bus
= m
->bus
, -ENOTCONN
);
2069 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2071 if (!BUS_IS_OPEN(bus
->state
))
2074 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2075 if (!callback
&& !slot
&& !m
->sealed
)
2076 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2078 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2082 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2086 r
= bus_seal_message(bus
, m
, usec
);
2090 r
= bus_remarshal_message(bus
, &m
);
2094 if (slot
|| callback
) {
2095 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2099 s
->reply_callback
.callback
= callback
;
2101 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2102 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2104 s
->reply_callback
.cookie
= 0;
2108 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2109 if (s
->reply_callback
.timeout_usec
!= 0) {
2110 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2112 s
->reply_callback
.timeout_usec
= 0;
2118 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2129 int bus_ensure_running(sd_bus
*bus
) {
2134 if (bus
->state
== BUS_RUNNING
)
2138 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2141 r
= sd_bus_process(bus
, NULL
);
2144 if (bus
->state
== BUS_RUNNING
)
2149 r
= sd_bus_wait(bus
, (uint64_t) -1);
2155 _public_
int sd_bus_call(
2159 sd_bus_error
*error
,
2160 sd_bus_message
**reply
) {
2162 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2168 bus_assert_return(m
, -EINVAL
, error
);
2169 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2170 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2171 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2174 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2176 assert_return(bus
= m
->bus
, -ENOTCONN
);
2177 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2179 if (!BUS_IS_OPEN(bus
->state
)) {
2184 r
= bus_ensure_running(bus
);
2188 i
= bus
->rqueue_size
;
2190 r
= bus_seal_message(bus
, m
, usec
);
2194 r
= bus_remarshal_message(bus
, &m
);
2198 r
= sd_bus_send(bus
, m
, &cookie
);
2202 timeout
= calc_elapse(bus
, m
->timeout
);
2207 while (i
< bus
->rqueue_size
) {
2208 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2210 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2212 if (incoming
->reply_cookie
== cookie
) {
2213 /* Found a match! */
2215 rqueue_drop_one(bus
, i
);
2216 log_debug_bus_message(incoming
);
2218 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2220 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2222 *reply
= TAKE_PTR(incoming
);
2227 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2229 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2230 return sd_bus_error_copy(error
, &incoming
->error
);
2236 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2239 streq(bus
->unique_name
, incoming
->sender
)) {
2241 rqueue_drop_one(bus
, i
);
2243 /* Our own message? Somebody is trying to send its own client a message,
2244 * let's not dead-lock, let's fail immediately. */
2250 /* Try to read more, right-away */
2254 r
= bus_read_message(bus
);
2256 if (ERRNO_IS_DISCONNECT(r
)) {
2257 bus_enter_closing(bus
);
2269 n
= now(CLOCK_MONOTONIC
);
2277 left
= (uint64_t) -1;
2279 r
= bus_poll(bus
, true, left
);
2287 r
= dispatch_wqueue(bus
);
2289 if (ERRNO_IS_DISCONNECT(r
)) {
2290 bus_enter_closing(bus
);
2299 return sd_bus_error_set_errno(error
, r
);
2302 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2303 assert_return(bus
, -EINVAL
);
2304 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2305 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2306 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2308 if (bus
->state
== BUS_CLOSED
)
2311 if (bus
->inotify_fd
>= 0)
2312 return bus
->inotify_fd
;
2314 if (bus
->input_fd
>= 0)
2315 return bus
->input_fd
;
2320 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2323 assert_return(bus
, -EINVAL
);
2324 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2325 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2327 switch (bus
->state
) {
2333 case BUS_WATCH_BIND
:
2341 case BUS_AUTHENTICATING
:
2342 if (bus_socket_auth_needs_write(bus
))
2350 if (bus
->rqueue_size
<= 0)
2352 if (bus
->wqueue_size
> 0)
2360 assert_not_reached("Unknown state");
2366 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2367 struct reply_callback
*c
;
2369 assert_return(bus
, -EINVAL
);
2370 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2371 assert_return(timeout_usec
, -EINVAL
);
2372 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2374 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2377 if (bus
->track_queue
) {
2382 switch (bus
->state
) {
2384 case BUS_AUTHENTICATING
:
2385 *timeout_usec
= bus
->auth_timeout
;
2390 if (bus
->rqueue_size
> 0) {
2395 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2397 *timeout_usec
= (uint64_t) -1;
2401 if (c
->timeout_usec
== 0) {
2402 *timeout_usec
= (uint64_t) -1;
2406 *timeout_usec
= c
->timeout_usec
;
2413 case BUS_WATCH_BIND
:
2415 *timeout_usec
= (uint64_t) -1;
2419 assert_not_reached("Unknown or unexpected stat");
2423 static int process_timeout(sd_bus
*bus
) {
2424 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2425 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2426 struct reply_callback
*c
;
2433 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2435 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2439 n
= now(CLOCK_MONOTONIC
);
2440 if (c
->timeout_usec
> n
)
2443 r
= bus_message_new_synthetic_error(
2446 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2451 m
->read_counter
= ++bus
->read_counter
;
2453 r
= bus_seal_synthetic_message(bus
, m
);
2457 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2458 c
->timeout_usec
= 0;
2460 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2463 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2465 bus
->iteration_counter
++;
2467 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2469 bus
->current_message
= m
;
2470 bus
->current_slot
= sd_bus_slot_ref(slot
);
2471 bus
->current_handler
= c
->callback
;
2472 bus
->current_userdata
= slot
->userdata
;
2473 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2474 bus
->current_userdata
= NULL
;
2475 bus
->current_handler
= NULL
;
2476 bus
->current_slot
= NULL
;
2477 bus
->current_message
= NULL
;
2480 bus_slot_disconnect(slot
, true);
2482 sd_bus_slot_unref(slot
);
2484 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2485 * and ignore the callback handler's return value. */
2489 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2492 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2496 if (bus
->state
!= BUS_HELLO
)
2499 /* Let's make sure the first message on the bus is the HELLO
2500 * reply. But note that we don't actually parse the message
2501 * here (we leave that to the usual handling), we just verify
2502 * we don't let any earlier msg through. */
2504 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2507 if (m
->reply_cookie
!= 1)
2513 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2514 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2515 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2516 struct reply_callback
*c
;
2524 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2527 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2530 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2536 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2538 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2540 /* If the reply contained a file descriptor which we
2541 * didn't want we pass an error instead. */
2543 r
= bus_message_new_synthetic_error(
2546 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2551 /* Copy over original timestamp */
2552 synthetic_reply
->realtime
= m
->realtime
;
2553 synthetic_reply
->monotonic
= m
->monotonic
;
2554 synthetic_reply
->seqnum
= m
->seqnum
;
2555 synthetic_reply
->read_counter
= m
->read_counter
;
2557 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2561 m
= synthetic_reply
;
2563 r
= sd_bus_message_rewind(m
, true);
2568 if (c
->timeout_usec
!= 0) {
2569 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2570 c
->timeout_usec
= 0;
2573 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2575 bus
->current_slot
= sd_bus_slot_ref(slot
);
2576 bus
->current_handler
= c
->callback
;
2577 bus
->current_userdata
= slot
->userdata
;
2578 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2579 bus
->current_userdata
= NULL
;
2580 bus
->current_handler
= NULL
;
2581 bus
->current_slot
= NULL
;
2584 bus_slot_disconnect(slot
, true);
2586 sd_bus_slot_unref(slot
);
2588 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2589 * ignore the callback handler's return value. */
2593 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2596 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2597 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2598 struct filter_callback
*l
;
2605 bus
->filter_callbacks_modified
= false;
2607 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2610 if (bus
->filter_callbacks_modified
)
2613 /* Don't run this more than once per iteration */
2614 if (l
->last_iteration
== bus
->iteration_counter
)
2617 l
->last_iteration
= bus
->iteration_counter
;
2619 r
= sd_bus_message_rewind(m
, true);
2623 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2625 bus
->current_slot
= sd_bus_slot_ref(slot
);
2626 bus
->current_handler
= l
->callback
;
2627 bus
->current_userdata
= slot
->userdata
;
2628 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2629 bus
->current_userdata
= NULL
;
2630 bus
->current_handler
= NULL
;
2631 bus
->current_slot
= sd_bus_slot_unref(slot
);
2633 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2639 } while (bus
->filter_callbacks_modified
);
2644 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2651 bus
->match_callbacks_modified
= false;
2653 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2657 } while (bus
->match_callbacks_modified
);
2662 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2663 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2669 if (bus
->is_monitor
)
2672 if (bus
->manual_peer_interface
)
2675 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2678 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2681 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2684 if (streq_ptr(m
->member
, "Ping"))
2685 r
= sd_bus_message_new_method_return(m
, &reply
);
2686 else if (streq_ptr(m
->member
, "GetMachineId")) {
2688 char sid
[SD_ID128_STRING_MAX
];
2690 r
= sd_id128_get_machine(&id
);
2694 r
= sd_bus_message_new_method_return(m
, &reply
);
2698 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2700 r
= sd_bus_message_new_method_errorf(
2702 SD_BUS_ERROR_UNKNOWN_METHOD
,
2703 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2708 r
= sd_bus_send(bus
, reply
, NULL
);
2715 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2719 /* If we got a message with a file descriptor which we didn't
2720 * want to accept, then let's drop it. How can this even
2721 * happen? For example, when the kernel queues a message into
2722 * an activatable names's queue which allows fds, and then is
2723 * delivered to us later even though we ourselves did not
2726 if (bus
->is_monitor
)
2735 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2736 return 1; /* just eat it up */
2738 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2741 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2747 bus
->current_message
= m
;
2748 bus
->iteration_counter
++;
2750 log_debug_bus_message(m
);
2752 r
= process_hello(bus
, m
);
2756 r
= process_reply(bus
, m
);
2760 r
= process_fd_check(bus
, m
);
2764 r
= process_filter(bus
, m
);
2768 r
= process_match(bus
, m
);
2772 r
= process_builtin(bus
, m
);
2776 r
= bus_process_object(bus
, m
);
2779 bus
->current_message
= NULL
;
2783 static int dispatch_track(sd_bus
*bus
) {
2786 if (!bus
->track_queue
)
2789 bus_track_dispatch(bus
->track_queue
);
2793 static int process_running(sd_bus
*bus
, sd_bus_message
**ret
) {
2794 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2798 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2800 r
= process_timeout(bus
);
2804 r
= dispatch_wqueue(bus
);
2808 r
= dispatch_track(bus
);
2812 r
= dispatch_rqueue(bus
, &m
);
2818 r
= process_message(bus
, m
);
2823 r
= sd_bus_message_rewind(m
, true);
2831 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2833 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2834 strna(sd_bus_message_get_sender(m
)),
2835 strna(sd_bus_message_get_path(m
)),
2836 strna(sd_bus_message_get_interface(m
)),
2837 strna(sd_bus_message_get_member(m
)));
2839 r
= sd_bus_reply_method_errorf(
2841 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2842 "Unknown object '%s'.", m
->path
);
2856 static int bus_exit_now(sd_bus
*bus
) {
2859 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2860 * sd_event_exit(), otherwise invokes libc exit(). */
2862 if (bus
->exited
) /* did we already exit? */
2864 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2866 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2869 bus
->exited
= true; /* never exit more than once */
2871 log_debug("Bus connection disconnected, exiting.");
2874 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2878 assert_not_reached("exit() didn't exit?");
2881 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2882 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2883 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2890 r
= bus_message_new_synthetic_error(
2893 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2898 m
->read_counter
= ++bus
->read_counter
;
2900 r
= bus_seal_synthetic_message(bus
, m
);
2904 if (c
->timeout_usec
!= 0) {
2905 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2906 c
->timeout_usec
= 0;
2909 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2912 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2914 bus
->iteration_counter
++;
2916 bus
->current_message
= m
;
2917 bus
->current_slot
= sd_bus_slot_ref(slot
);
2918 bus
->current_handler
= c
->callback
;
2919 bus
->current_userdata
= slot
->userdata
;
2920 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2921 bus
->current_userdata
= NULL
;
2922 bus
->current_handler
= NULL
;
2923 bus
->current_slot
= NULL
;
2924 bus
->current_message
= NULL
;
2927 bus_slot_disconnect(slot
, true);
2929 sd_bus_slot_unref(slot
);
2931 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2934 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2935 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2936 struct reply_callback
*c
;
2940 assert(bus
->state
== BUS_CLOSING
);
2942 /* First, fail all outstanding method calls */
2943 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2945 return process_closing_reply_callback(bus
, c
);
2947 /* Then, fake-drop all remaining bus tracking references */
2949 bus_track_close(bus
->tracks
);
2953 /* Then, synthesize a Disconnected message */
2954 r
= sd_bus_message_new_signal(
2957 "/org/freedesktop/DBus/Local",
2958 "org.freedesktop.DBus.Local",
2963 bus_message_set_sender_local(bus
, m
);
2964 m
->read_counter
= ++bus
->read_counter
;
2966 r
= bus_seal_synthetic_message(bus
, m
);
2972 bus
->current_message
= m
;
2973 bus
->iteration_counter
++;
2975 r
= process_filter(bus
, m
);
2979 r
= process_match(bus
, m
);
2983 /* Nothing else to do, exit now, if the condition holds */
2984 bus
->exit_triggered
= true;
2985 (void) bus_exit_now(bus
);
2993 bus
->current_message
= NULL
;
2998 static int bus_process_internal(sd_bus
*bus
, sd_bus_message
**ret
) {
3001 /* Returns 0 when we didn't do anything. This should cause the
3002 * caller to invoke sd_bus_wait() before returning the next
3003 * time. Returns > 0 when we did something, which possibly
3004 * means *ret is filled in with an unprocessed message. */
3006 assert_return(bus
, -EINVAL
);
3007 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3008 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3010 /* We don't allow recursively invoking sd_bus_process(). */
3011 assert_return(!bus
->current_message
, -EBUSY
);
3012 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
3014 BUS_DONT_DESTROY(bus
);
3016 switch (bus
->state
) {
3024 case BUS_WATCH_BIND
:
3025 r
= bus_socket_process_watch_bind(bus
);
3029 r
= bus_socket_process_opening(bus
);
3032 case BUS_AUTHENTICATING
:
3033 r
= bus_socket_process_authenticating(bus
);
3038 r
= process_running(bus
, ret
);
3042 /* This branch initializes *ret, hence we don't use the generic error checking below */
3046 return process_closing(bus
, ret
);
3049 assert_not_reached("Unknown state");
3052 if (ERRNO_IS_DISCONNECT(r
)) {
3053 bus_enter_closing(bus
);
3064 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3065 return bus_process_internal(bus
, ret
);
3068 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3069 return bus_process_internal(bus
, ret
);
3072 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3073 struct pollfd p
[2] = {};
3076 usec_t m
= USEC_INFINITY
;
3080 if (bus
->state
== BUS_CLOSING
)
3083 if (!BUS_IS_OPEN(bus
->state
))
3086 if (bus
->state
== BUS_WATCH_BIND
) {
3087 assert(bus
->inotify_fd
>= 0);
3089 p
[0].events
= POLLIN
;
3090 p
[0].fd
= bus
->inotify_fd
;
3095 e
= sd_bus_get_events(bus
);
3100 /* The caller really needs some more data, he doesn't
3101 * care about what's already read, or any timeouts
3102 * except its own. */
3106 /* The caller wants to process if there's something to
3107 * process, but doesn't care otherwise */
3109 r
= sd_bus_get_timeout(bus
, &until
);
3113 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3116 p
[0].fd
= bus
->input_fd
;
3117 if (bus
->output_fd
== bus
->input_fd
) {
3121 p
[0].events
= e
& POLLIN
;
3122 p
[1].fd
= bus
->output_fd
;
3123 p
[1].events
= e
& POLLOUT
;
3128 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3131 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3137 if (p
[0].revents
& POLLNVAL
)
3139 if (n
>= 2 && (p
[1].revents
& POLLNVAL
))
3145 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3147 assert_return(bus
, -EINVAL
);
3148 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3149 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3151 if (bus
->state
== BUS_CLOSING
)
3154 if (!BUS_IS_OPEN(bus
->state
))
3157 if (bus
->rqueue_size
> 0)
3160 return bus_poll(bus
, false, timeout_usec
);
3163 _public_
int sd_bus_flush(sd_bus
*bus
) {
3166 assert_return(bus
, -EINVAL
);
3167 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3168 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3170 if (bus
->state
== BUS_CLOSING
)
3173 if (!BUS_IS_OPEN(bus
->state
))
3176 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3177 if (bus
->state
== BUS_WATCH_BIND
)
3180 r
= bus_ensure_running(bus
);
3184 if (bus
->wqueue_size
<= 0)
3188 r
= dispatch_wqueue(bus
);
3190 if (ERRNO_IS_DISCONNECT(r
)) {
3191 bus_enter_closing(bus
);
3198 if (bus
->wqueue_size
<= 0)
3201 r
= bus_poll(bus
, false, (uint64_t) -1);
3207 _public_
int sd_bus_add_filter(
3210 sd_bus_message_handler_t callback
,
3215 assert_return(bus
, -EINVAL
);
3216 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3217 assert_return(callback
, -EINVAL
);
3218 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3220 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3224 s
->filter_callback
.callback
= callback
;
3226 bus
->filter_callbacks_modified
= true;
3227 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3235 static int add_match_callback(
3238 sd_bus_error
*ret_error
) {
3240 sd_bus_slot
*match_slot
= userdata
;
3241 bool failed
= false;
3247 sd_bus_slot_ref(match_slot
);
3249 if (sd_bus_message_is_method_error(m
, NULL
)) {
3250 log_debug_errno(sd_bus_message_get_errno(m
),
3251 "Unable to add match %s, failing connection: %s",
3252 match_slot
->match_callback
.match_string
,
3253 sd_bus_message_get_error(m
)->message
);
3257 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3259 if (match_slot
->match_callback
.install_callback
) {
3262 bus
= sd_bus_message_get_bus(m
);
3264 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3265 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3268 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3269 assert(bus
->current_handler
== add_match_callback
);
3270 assert(bus
->current_userdata
== userdata
);
3272 bus
->current_slot
= match_slot
;
3273 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3274 bus
->current_userdata
= match_slot
->userdata
;
3276 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3278 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3279 bus
->current_handler
= add_match_callback
;
3280 bus
->current_userdata
= userdata
;
3282 if (failed
) /* Generic failure handling: destroy the connection */
3283 bus_enter_closing(sd_bus_message_get_bus(m
));
3288 /* We don't need the install method reply slot anymore, let's free it */
3289 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3291 if (failed
&& match_slot
->floating
)
3292 bus_slot_disconnect(match_slot
, true);
3294 sd_bus_slot_unref(match_slot
);
3299 static int bus_add_match_full(
3304 sd_bus_message_handler_t callback
,
3305 sd_bus_message_handler_t install_callback
,
3308 struct bus_match_component
*components
= NULL
;
3309 unsigned n_components
= 0;
3310 sd_bus_slot
*s
= NULL
;
3313 assert_return(bus
, -EINVAL
);
3314 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3315 assert_return(match
, -EINVAL
);
3316 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3318 r
= bus_match_parse(match
, &components
, &n_components
);
3322 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3328 s
->match_callback
.callback
= callback
;
3329 s
->match_callback
.install_callback
= install_callback
;
3331 if (bus
->bus_client
) {
3332 enum bus_match_scope scope
;
3334 scope
= bus_match_get_scope(components
, n_components
);
3336 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3337 if (scope
!= BUS_MATCH_LOCAL
) {
3339 /* We store the original match string, so that we can use it to remove the match again. */
3341 s
->match_callback
.match_string
= strdup(match
);
3342 if (!s
->match_callback
.match_string
) {
3348 r
= bus_add_match_internal_async(bus
,
3349 &s
->match_callback
.install_slot
,
3350 s
->match_callback
.match_string
,
3357 /* Make the slot of the match call floating now. We need the reference, but we don't
3358 * want that this match pins the bus object, hence we first create it non-floating, but
3359 * then make it floating. */
3360 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3362 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
, &s
->match_callback
.after
);
3366 s
->match_added
= true;
3370 bus
->match_callbacks_modified
= true;
3371 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3380 bus_match_parse_free(components
, n_components
);
3381 sd_bus_slot_unref(s
);
3386 _public_
int sd_bus_add_match(
3390 sd_bus_message_handler_t callback
,
3393 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3396 _public_
int sd_bus_add_match_async(
3400 sd_bus_message_handler_t callback
,
3401 sd_bus_message_handler_t install_callback
,
3404 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3407 bool bus_pid_changed(sd_bus
*bus
) {
3410 /* We don't support people creating a bus connection and
3411 * keeping it around over a fork(). Let's complain. */
3413 return bus
->original_pid
!= getpid_cached();
3416 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3417 sd_bus
*bus
= userdata
;
3422 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3424 r
= sd_bus_process(bus
, NULL
);
3426 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3427 bus_enter_closing(bus
);
3433 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3434 sd_bus
*bus
= userdata
;
3439 r
= sd_bus_process(bus
, NULL
);
3441 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3442 bus_enter_closing(bus
);
3448 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3449 sd_bus
*bus
= userdata
;
3456 e
= sd_bus_get_events(bus
);
3462 if (bus
->output_fd
!= bus
->input_fd
) {
3464 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3468 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3470 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3474 r
= sd_bus_get_timeout(bus
, &until
);
3480 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3487 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3494 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3495 bus_enter_closing(bus
);
3500 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3501 sd_bus
*bus
= userdata
;
3505 if (bus
->close_on_exit
) {
3513 int bus_attach_io_events(sd_bus
*bus
) {
3518 if (bus
->input_fd
< 0)
3524 if (!bus
->input_io_event_source
) {
3525 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3529 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3533 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3537 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3539 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3544 if (bus
->output_fd
!= bus
->input_fd
) {
3545 assert(bus
->output_fd
>= 0);
3547 if (!bus
->output_io_event_source
) {
3548 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3552 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3556 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3558 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3567 static void bus_detach_io_events(sd_bus
*bus
) {
3570 if (bus
->input_io_event_source
) {
3571 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3572 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3575 if (bus
->output_io_event_source
) {
3576 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3577 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3581 int bus_attach_inotify_event(sd_bus
*bus
) {
3586 if (bus
->inotify_fd
< 0)
3592 if (!bus
->inotify_event_source
) {
3593 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3597 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3601 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3603 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3610 static void bus_detach_inotify_event(sd_bus
*bus
) {
3613 if (bus
->inotify_event_source
) {
3614 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3615 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3619 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3622 assert_return(bus
, -EINVAL
);
3623 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3624 assert_return(!bus
->event
, -EBUSY
);
3626 assert(!bus
->input_io_event_source
);
3627 assert(!bus
->output_io_event_source
);
3628 assert(!bus
->time_event_source
);
3631 bus
->event
= sd_event_ref(event
);
3633 r
= sd_event_default(&bus
->event
);
3638 bus
->event_priority
= priority
;
3640 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3644 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3648 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3652 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3656 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3660 r
= bus_attach_io_events(bus
);
3664 r
= bus_attach_inotify_event(bus
);
3671 sd_bus_detach_event(bus
);
3675 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3676 assert_return(bus
, -EINVAL
);
3677 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3682 bus_detach_io_events(bus
);
3683 bus_detach_inotify_event(bus
);
3685 if (bus
->time_event_source
) {
3686 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3687 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3690 if (bus
->quit_event_source
) {
3691 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3692 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3695 bus
->event
= sd_event_unref(bus
->event
);
3699 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3700 assert_return(bus
= bus_resolve(bus
), NULL
);
3705 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3706 assert_return(bus
= bus_resolve(bus
), NULL
);
3708 return bus
->current_message
;
3711 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3712 assert_return(bus
= bus_resolve(bus
), NULL
);
3714 return bus
->current_slot
;
3717 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3718 assert_return(bus
= bus_resolve(bus
), NULL
);
3720 return bus
->current_handler
;
3723 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3724 assert_return(bus
= bus_resolve(bus
), NULL
);
3726 return bus
->current_userdata
;
3729 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3734 assert(default_bus
);
3737 return !!*default_bus
;
3740 *ret
= sd_bus_ref(*default_bus
);
3748 b
->default_bus_ptr
= default_bus
;
3756 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3757 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3760 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3761 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3764 _public_
int sd_bus_default(sd_bus
**ret
) {
3765 int (*bus_open
)(sd_bus
**) = NULL
;
3768 busp
= bus_choose_default(&bus_open
);
3769 return bus_default(bus_open
, busp
, ret
);
3772 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3773 assert_return(b
, -EINVAL
);
3774 assert_return(tid
, -EINVAL
);
3775 assert_return(!bus_pid_changed(b
), -ECHILD
);
3783 return sd_event_get_tid(b
->event
, tid
);
3788 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3789 _cleanup_free_
char *e
= NULL
;
3792 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3793 assert_return(external_id
, -EINVAL
);
3794 assert_return(ret_path
, -EINVAL
);
3796 e
= bus_label_escape(external_id
);
3800 ret
= path_join(prefix
, e
);
3808 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3812 assert_return(object_path_is_valid(path
), -EINVAL
);
3813 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3814 assert_return(external_id
, -EINVAL
);
3816 e
= object_path_startswith(path
, prefix
);
3818 *external_id
= NULL
;
3822 ret
= bus_label_unescape(e
);
3830 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3831 _cleanup_strv_free_
char **labels
= NULL
;
3832 char *path
, *path_pos
, **label_pos
;
3833 const char *sep
, *template_pos
;
3838 assert_return(out
, -EINVAL
);
3839 assert_return(path_template
, -EINVAL
);
3841 path_length
= strlen(path_template
);
3843 va_start(list
, path_template
);
3844 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3848 arg
= va_arg(list
, const char *);
3854 label
= bus_label_escape(arg
);
3860 r
= strv_consume(&labels
, label
);
3866 /* add label length, but account for the format character */
3867 path_length
+= strlen(label
) - 1;
3871 path
= malloc(path_length
+ 1);
3878 for (template_pos
= path_template
; *template_pos
; ) {
3879 sep
= strchrnul(template_pos
, '%');
3880 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3884 path_pos
= stpcpy(path_pos
, *label_pos
++);
3885 template_pos
= sep
+ 1;
3893 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3894 _cleanup_strv_free_
char **labels
= NULL
;
3895 const char *template_pos
, *path_pos
;
3901 * This decodes an object-path based on a template argument. The
3902 * template consists of a verbatim path, optionally including special
3905 * - Each occurrence of '%' in the template matches an arbitrary
3906 * substring of a label in the given path. At most one such
3907 * directive is allowed per label. For each such directive, the
3908 * caller must provide an output parameter (char **) via va_arg. If
3909 * NULL is passed, the given label is verified, but not returned.
3910 * For each matched label, the *decoded* label is stored in the
3911 * passed output argument, and the caller is responsible to free
3912 * it. Note that the output arguments are only modified if the
3913 * actually path matched the template. Otherwise, they're left
3916 * This function returns <0 on error, 0 if the path does not match the
3917 * template, 1 if it matched.
3920 assert_return(path
, -EINVAL
);
3921 assert_return(path_template
, -EINVAL
);
3925 for (template_pos
= path_template
; *template_pos
; ) {
3930 /* verify everything until the next '%' matches verbatim */
3931 sep
= strchrnul(template_pos
, '%');
3932 length
= sep
- template_pos
;
3933 if (strncmp(path_pos
, template_pos
, length
))
3937 template_pos
+= length
;
3942 /* We found the next '%' character. Everything up until here
3943 * matched. We now skip ahead to the end of this label and make
3944 * sure it matches the tail of the label in the path. Then we
3945 * decode the string in-between and save it for later use. */
3947 ++template_pos
; /* skip over '%' */
3949 sep
= strchrnul(template_pos
, '/');
3950 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3952 /* verify the suffixes match */
3953 sep
= strchrnul(path_pos
, '/');
3954 if (sep
- path_pos
< (ssize_t
)length
||
3955 strncmp(sep
- length
, template_pos
, length
))
3958 template_pos
+= length
; /* skip over matched label */
3959 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3961 /* store unescaped label for later use */
3962 label
= bus_label_unescape_n(path_pos
, length
);
3966 r
= strv_consume(&labels
, label
);
3970 path_pos
= sep
; /* skip decoded label and suffix */
3973 /* end of template must match end of path */
3977 /* copy the labels over to the caller */
3978 va_start(list
, path_template
);
3979 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3982 arg
= va_arg(list
, char **);
3990 labels
= mfree(labels
);
3994 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3995 assert_return(bus
, -EINVAL
);
3996 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3997 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4002 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
4003 assert_return(bus
, -EINVAL
);
4004 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4005 assert_return(description
, -EINVAL
);
4006 assert_return(bus
->description
, -ENXIO
);
4007 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4009 if (bus
->description
)
4010 *description
= bus
->description
;
4011 else if (bus
->is_system
)
4012 *description
= "system";
4013 else if (bus
->is_user
)
4014 *description
= "user";
4016 *description
= NULL
;
4021 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
4022 assert_return(bus
, -EINVAL
);
4023 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4024 assert_return(scope
, -EINVAL
);
4025 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4032 if (bus
->is_system
) {
4040 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4041 assert_return(bus
, -EINVAL
);
4042 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4043 assert_return(address
, -EINVAL
);
4044 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4047 *address
= bus
->address
;
4054 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4055 assert_return(bus
, -EINVAL
);
4056 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4057 assert_return(mask
, -EINVAL
);
4058 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4060 *mask
= bus
->creds_mask
;
4064 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4065 assert_return(bus
, -EINVAL
);
4066 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4067 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4069 return bus
->bus_client
;
4072 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4073 assert_return(bus
, -EINVAL
);
4074 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4075 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4077 return bus
->is_server
;
4080 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4081 assert_return(bus
, -EINVAL
);
4082 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4083 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4085 return bus
->anonymous_auth
;
4088 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4089 assert_return(bus
, -EINVAL
);
4090 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4091 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4093 return bus
->trusted
;
4096 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4097 assert_return(bus
, -EINVAL
);
4098 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4099 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4101 return bus
->is_monitor
;
4104 static void flush_close(sd_bus
*bus
) {
4108 /* Flushes and closes the specified bus. We take a ref before,
4109 * to ensure the flushing does not cause the bus to be
4112 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4115 _public_
void sd_bus_default_flush_close(void) {
4116 flush_close(default_starter_bus
);
4117 flush_close(default_user_bus
);
4118 flush_close(default_system_bus
);
4121 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4122 assert_return(bus
, -EINVAL
);
4123 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4125 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4126 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4127 * from the client side. */
4128 bus
->exit_on_disconnect
= b
;
4130 /* If the exit condition was triggered already, exit immediately. */
4131 return bus_exit_now(bus
);
4134 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4135 assert_return(bus
, -EINVAL
);
4136 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4138 return bus
->exit_on_disconnect
;
4141 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4142 assert_return(bus
, -EINVAL
);
4143 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4144 assert_return(!bus
->bus_client
, -EPERM
);
4145 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4147 return free_and_strdup(&bus
->patch_sender
, sender
);
4150 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4151 assert_return(bus
, -EINVAL
);
4152 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4153 assert_return(ret
, -EINVAL
);
4155 if (!bus
->patch_sender
)
4158 *ret
= bus
->patch_sender
;
4162 _public_
int sd_bus_get_n_queued_read(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
->rqueue_size
;
4172 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4173 assert_return(bus
, -EINVAL
);
4174 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4175 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4176 assert_return(ret
, -EINVAL
);
4178 *ret
= bus
->wqueue_size
;
4182 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4183 assert_return(bus
, -EINVAL
);
4184 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4186 bus
->method_call_timeout
= usec
;
4190 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4194 assert_return(bus
, -EINVAL
);
4195 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4196 assert_return(ret
, -EINVAL
);
4198 if (bus
->method_call_timeout
!= 0) {
4199 *ret
= bus
->method_call_timeout
;
4203 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4204 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4205 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4206 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4207 *ret
= bus
->method_call_timeout
= usec
;
4211 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4215 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4216 assert_return(bus
, -EINVAL
);
4217 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4219 bus
->close_on_exit
= b
;
4223 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4224 assert_return(bus
, -EINVAL
);
4225 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4227 return bus
->close_on_exit
;
4230 _public_
int sd_bus_enqueue_for_read(sd_bus
*bus
, sd_bus_message
*m
) {
4233 assert_return(bus
, -EINVAL
);
4234 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4235 assert_return(m
, -EINVAL
);
4236 assert_return(m
->sealed
, -EINVAL
);
4237 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4239 if (!BUS_IS_OPEN(bus
->state
))
4242 /* Re-enqueue a message for reading. This is primarily useful for PolicyKit-style authentication,
4243 * where we accept a message, then determine we need to interactively authenticate the user, and then
4244 * we want to process the message again. */
4246 r
= bus_rqueue_make_room(bus
);
4250 bus
->rqueue
[bus
->rqueue_size
++] = bus_message_ref_queued(m
, bus
);