1 /* SPDX-License-Identifier: LGPL-2.1+ */
15 #include "alloc-util.h"
16 #include "bus-container.h"
17 #include "bus-control.h"
18 #include "bus-internal.h"
19 #include "bus-kernel.h"
20 #include "bus-label.h"
21 #include "bus-message.h"
22 #include "bus-objects.h"
23 #include "bus-protocol.h"
25 #include "bus-socket.h"
26 #include "bus-track.h"
29 #include "cgroup-util.h"
32 #include "hexdecoct.h"
33 #include "hostname-util.h"
36 #include "parse-util.h"
37 #include "process-util.h"
38 #include "string-util.h"
42 #define log_debug_bus_message(m) \
44 sd_bus_message *_mm = (m); \
45 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", \
46 bus_message_type_to_string(_mm->header->type), \
47 strna(sd_bus_message_get_sender(_mm)), \
48 strna(sd_bus_message_get_destination(_mm)), \
49 strna(sd_bus_message_get_path(_mm)), \
50 strna(sd_bus_message_get_interface(_mm)), \
51 strna(sd_bus_message_get_member(_mm)), \
52 BUS_MESSAGE_COOKIE(_mm), \
54 strna(_mm->root_container.signature), \
55 strna(_mm->error.name), \
56 strna(_mm->error.message)); \
59 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
);
60 static void bus_detach_io_events(sd_bus
*b
);
61 static void bus_detach_inotify_event(sd_bus
*b
);
63 static thread_local sd_bus
*default_system_bus
= NULL
;
64 static thread_local sd_bus
*default_user_bus
= NULL
;
65 static thread_local sd_bus
*default_starter_bus
= NULL
;
67 static sd_bus
**bus_choose_default(int (**bus_open
)(sd_bus
**)) {
70 /* Let's try our best to reuse another cached connection. If
71 * the starter bus type is set, connect via our normal
72 * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
73 * we can share the connection with the user/system default
76 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
78 if (streq(e
, "system")) {
80 *bus_open
= sd_bus_open_system
;
81 return &default_system_bus
;
82 } else if (STR_IN_SET(e
, "user", "session")) {
84 *bus_open
= sd_bus_open_user
;
85 return &default_user_bus
;
89 /* No type is specified, so we have not other option than to
90 * use the starter address if it is set. */
91 e
= secure_getenv("DBUS_STARTER_ADDRESS");
94 *bus_open
= sd_bus_open
;
95 return &default_starter_bus
;
98 /* Finally, if nothing is set use the cached connection for
101 if (cg_pid_get_owner_uid(0, NULL
) >= 0) {
103 *bus_open
= sd_bus_open_user
;
104 return &default_user_bus
;
107 *bus_open
= sd_bus_open_system
;
108 return &default_system_bus
;
112 sd_bus
*bus_resolve(sd_bus
*bus
) {
113 switch ((uintptr_t) bus
) {
114 case (uintptr_t) SD_BUS_DEFAULT
:
115 return *(bus_choose_default(NULL
));
116 case (uintptr_t) SD_BUS_DEFAULT_USER
:
117 return default_user_bus
;
118 case (uintptr_t) SD_BUS_DEFAULT_SYSTEM
:
119 return default_system_bus
;
125 void bus_close_io_fds(sd_bus
*b
) {
128 bus_detach_io_events(b
);
130 if (b
->input_fd
!= b
->output_fd
)
131 safe_close(b
->output_fd
);
132 b
->output_fd
= b
->input_fd
= safe_close(b
->input_fd
);
135 void bus_close_inotify_fd(sd_bus
*b
) {
138 bus_detach_inotify_event(b
);
140 b
->inotify_fd
= safe_close(b
->inotify_fd
);
141 b
->inotify_watches
= mfree(b
->inotify_watches
);
142 b
->n_inotify_watches
= 0;
145 static void bus_reset_queues(sd_bus
*b
) {
148 while (b
->rqueue_size
> 0)
149 bus_message_unref_queued(b
->rqueue
[--b
->rqueue_size
], b
);
151 b
->rqueue
= mfree(b
->rqueue
);
152 b
->rqueue_allocated
= 0;
154 while (b
->wqueue_size
> 0)
155 bus_message_unref_queued(b
->wqueue
[--b
->wqueue_size
], b
);
157 b
->wqueue
= mfree(b
->wqueue
);
158 b
->wqueue_allocated
= 0;
161 static sd_bus
* bus_free(sd_bus
*b
) {
165 assert(!b
->track_queue
);
168 b
->state
= BUS_CLOSED
;
170 sd_bus_detach_event(b
);
172 while ((s
= b
->slots
)) {
173 /* At this point only floating slots can still be
174 * around, because the non-floating ones keep a
175 * reference to the bus, and we thus couldn't be
176 * destructing right now... We forcibly disconnect the
177 * slots here, so that they still can be referenced by
178 * apps, but are dead. */
181 bus_slot_disconnect(s
, true);
184 if (b
->default_bus_ptr
)
185 *b
->default_bus_ptr
= NULL
;
188 bus_close_inotify_fd(b
);
193 free(b
->unique_name
);
194 free(b
->auth_buffer
);
197 free(b
->description
);
198 free(b
->patch_sender
);
201 strv_free(b
->exec_argv
);
203 close_many(b
->fds
, b
->n_fds
);
208 ordered_hashmap_free_free(b
->reply_callbacks
);
209 prioq_free(b
->reply_callbacks_prioq
);
211 assert(b
->match_callbacks
.type
== BUS_MATCH_ROOT
);
212 bus_match_free(&b
->match_callbacks
);
214 hashmap_free_free(b
->vtable_methods
);
215 hashmap_free_free(b
->vtable_properties
);
217 assert(hashmap_isempty(b
->nodes
));
218 hashmap_free(b
->nodes
);
222 assert_se(pthread_mutex_destroy(&b
->memfd_cache_mutex
) == 0);
227 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus
*, bus_free
);
229 _public_
int sd_bus_new(sd_bus
**ret
) {
230 _cleanup_free_ sd_bus
*b
= NULL
;
232 assert_return(ret
, -EINVAL
);
239 .n_ref
= REFCNT_INIT
,
243 .message_version
= 1,
244 .creds_mask
= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
,
246 .original_pid
= getpid_cached(),
247 .n_groups
= (size_t) -1,
248 .close_on_exit
= true,
251 /* We guarantee that wqueue always has space for at least one entry */
252 if (!GREEDY_REALLOC(b
->wqueue
, b
->wqueue_allocated
, 1))
255 assert_se(pthread_mutex_init(&b
->memfd_cache_mutex
, NULL
) == 0);
261 _public_
int sd_bus_set_address(sd_bus
*bus
, const char *address
) {
262 assert_return(bus
, -EINVAL
);
263 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
264 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
265 assert_return(address
, -EINVAL
);
266 assert_return(!bus_pid_changed(bus
), -ECHILD
);
268 return free_and_strdup(&bus
->address
, address
);
271 _public_
int sd_bus_set_fd(sd_bus
*bus
, int input_fd
, int output_fd
) {
272 assert_return(bus
, -EINVAL
);
273 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
274 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
275 assert_return(input_fd
>= 0, -EBADF
);
276 assert_return(output_fd
>= 0, -EBADF
);
277 assert_return(!bus_pid_changed(bus
), -ECHILD
);
279 bus
->input_fd
= input_fd
;
280 bus
->output_fd
= output_fd
;
284 _public_
int sd_bus_set_exec(sd_bus
*bus
, const char *path
, char *const argv
[]) {
285 _cleanup_strv_free_
char **a
= NULL
;
288 assert_return(bus
, -EINVAL
);
289 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
290 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
291 assert_return(path
, -EINVAL
);
292 assert_return(!strv_isempty(argv
), -EINVAL
);
293 assert_return(!bus_pid_changed(bus
), -ECHILD
);
299 r
= free_and_strdup(&bus
->exec_path
, path
);
303 return strv_free_and_replace(bus
->exec_argv
, a
);
306 _public_
int sd_bus_set_bus_client(sd_bus
*bus
, int b
) {
307 assert_return(bus
, -EINVAL
);
308 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
309 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
310 assert_return(!bus
->patch_sender
, -EPERM
);
311 assert_return(!bus_pid_changed(bus
), -ECHILD
);
313 bus
->bus_client
= !!b
;
317 _public_
int sd_bus_set_monitor(sd_bus
*bus
, int b
) {
318 assert_return(bus
, -EINVAL
);
319 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
320 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
321 assert_return(!bus_pid_changed(bus
), -ECHILD
);
323 bus
->is_monitor
= !!b
;
327 _public_
int sd_bus_negotiate_fds(sd_bus
*bus
, int b
) {
328 assert_return(bus
, -EINVAL
);
329 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
330 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
331 assert_return(!bus_pid_changed(bus
), -ECHILD
);
333 bus
->accept_fd
= !!b
;
337 _public_
int sd_bus_negotiate_timestamp(sd_bus
*bus
, int b
) {
338 assert_return(bus
, -EINVAL
);
339 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
340 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
341 assert_return(!bus_pid_changed(bus
), -ECHILD
);
343 /* This is not actually supported by any of our transports these days, but we do honour it for synthetic
344 * replies, and maybe one day classic D-Bus learns this too */
345 bus
->attach_timestamp
= !!b
;
350 _public_
int sd_bus_negotiate_creds(sd_bus
*bus
, int b
, uint64_t mask
) {
351 assert_return(bus
, -EINVAL
);
352 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
353 assert_return(mask
<= _SD_BUS_CREDS_ALL
, -EINVAL
);
354 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
355 assert_return(!bus_pid_changed(bus
), -ECHILD
);
357 SET_FLAG(bus
->creds_mask
, mask
, b
);
359 /* The well knowns we need unconditionally, so that matches can work */
360 bus
->creds_mask
|= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
;
365 _public_
int sd_bus_set_server(sd_bus
*bus
, int b
, sd_id128_t server_id
) {
366 assert_return(bus
, -EINVAL
);
367 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
368 assert_return(b
|| sd_id128_equal(server_id
, SD_ID128_NULL
), -EINVAL
);
369 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
370 assert_return(!bus_pid_changed(bus
), -ECHILD
);
372 bus
->is_server
= !!b
;
373 bus
->server_id
= server_id
;
377 _public_
int sd_bus_set_anonymous(sd_bus
*bus
, int b
) {
378 assert_return(bus
, -EINVAL
);
379 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
380 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
381 assert_return(!bus_pid_changed(bus
), -ECHILD
);
383 bus
->anonymous_auth
= !!b
;
387 _public_
int sd_bus_set_trusted(sd_bus
*bus
, int b
) {
388 assert_return(bus
, -EINVAL
);
389 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
390 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
391 assert_return(!bus_pid_changed(bus
), -ECHILD
);
397 _public_
int sd_bus_set_description(sd_bus
*bus
, const char *description
) {
398 assert_return(bus
, -EINVAL
);
399 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
400 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
401 assert_return(!bus_pid_changed(bus
), -ECHILD
);
403 return free_and_strdup(&bus
->description
, description
);
406 _public_
int sd_bus_set_allow_interactive_authorization(sd_bus
*bus
, int b
) {
407 assert_return(bus
, -EINVAL
);
408 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
409 assert_return(!bus_pid_changed(bus
), -ECHILD
);
411 bus
->allow_interactive_authorization
= !!b
;
415 _public_
int sd_bus_get_allow_interactive_authorization(sd_bus
*bus
) {
416 assert_return(bus
, -EINVAL
);
417 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
418 assert_return(!bus_pid_changed(bus
), -ECHILD
);
420 return bus
->allow_interactive_authorization
;
423 _public_
int sd_bus_set_watch_bind(sd_bus
*bus
, int b
) {
424 assert_return(bus
, -EINVAL
);
425 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
426 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
427 assert_return(!bus_pid_changed(bus
), -ECHILD
);
429 bus
->watch_bind
= !!b
;
433 _public_
int sd_bus_get_watch_bind(sd_bus
*bus
) {
434 assert_return(bus
, -EINVAL
);
435 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
436 assert_return(!bus_pid_changed(bus
), -ECHILD
);
438 return bus
->watch_bind
;
441 _public_
int sd_bus_set_connected_signal(sd_bus
*bus
, int b
) {
442 assert_return(bus
, -EINVAL
);
443 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
444 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
445 assert_return(!bus_pid_changed(bus
), -ECHILD
);
447 bus
->connected_signal
= !!b
;
451 _public_
int sd_bus_get_connected_signal(sd_bus
*bus
) {
452 assert_return(bus
, -EINVAL
);
453 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
454 assert_return(!bus_pid_changed(bus
), -ECHILD
);
456 return bus
->connected_signal
;
459 static int synthesize_connected_signal(sd_bus
*bus
) {
460 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
465 /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called
466 * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the
467 * Hello() reply. Or in other words, whenver we enter BUS_RUNNING state.
469 * This is useful so that clients can start doing stuff whenver the connection is fully established in a way
470 * that works independently from whether we connected to a full bus or just a direct connection. */
472 if (!bus
->connected_signal
)
475 r
= sd_bus_message_new_signal(
478 "/org/freedesktop/DBus/Local",
479 "org.freedesktop.DBus.Local",
484 bus_message_set_sender_local(bus
, m
);
486 r
= bus_seal_synthetic_message(bus
, m
);
490 r
= bus_rqueue_make_room(bus
);
494 /* Insert at the very front */
495 memmove(bus
->rqueue
+ 1, bus
->rqueue
, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
496 bus
->rqueue
[0] = bus_message_ref_queued(m
, bus
);
502 void bus_set_state(sd_bus
*bus
, enum bus_state state
) {
504 static const char * const table
[_BUS_STATE_MAX
] = {
505 [BUS_UNSET
] = "UNSET",
506 [BUS_WATCH_BIND
] = "WATCH_BIND",
507 [BUS_OPENING
] = "OPENING",
508 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
509 [BUS_HELLO
] = "HELLO",
510 [BUS_RUNNING
] = "RUNNING",
511 [BUS_CLOSING
] = "CLOSING",
512 [BUS_CLOSED
] = "CLOSED",
516 assert(state
< _BUS_STATE_MAX
);
518 if (state
== bus
->state
)
521 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
525 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
533 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
535 r
= sd_bus_message_get_errno(reply
);
539 r
= sd_bus_message_read(reply
, "s", &s
);
543 if (!service_name_is_valid(s
) || s
[0] != ':')
546 r
= free_and_strdup(&bus
->unique_name
, s
);
550 if (bus
->state
== BUS_HELLO
) {
551 bus_set_state(bus
, BUS_RUNNING
);
553 r
= synthesize_connected_signal(bus
);
561 static int bus_send_hello(sd_bus
*bus
) {
562 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
567 if (!bus
->bus_client
)
570 r
= sd_bus_message_new_method_call(
573 "org.freedesktop.DBus",
574 "/org/freedesktop/DBus",
575 "org.freedesktop.DBus",
580 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
583 int bus_start_running(sd_bus
*bus
) {
584 struct reply_callback
*c
;
590 assert(bus
->state
< BUS_HELLO
);
592 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
593 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
594 * adding a fixed value to all entries should not alter the internal order. */
596 n
= now(CLOCK_MONOTONIC
);
597 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
598 if (c
->timeout_usec
== 0)
601 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
604 if (bus
->bus_client
) {
605 bus_set_state(bus
, BUS_HELLO
);
609 bus_set_state(bus
, BUS_RUNNING
);
611 r
= synthesize_connected_signal(bus
);
618 static int parse_address_key(const char **p
, const char *key
, char **value
) {
619 size_t l
, n
= 0, allocated
= 0;
620 _cleanup_free_
char *r
= NULL
;
629 if (strncmp(*p
, key
, l
) != 0)
642 while (!IN_SET(*a
, ';', ',', 0)) {
656 c
= (char) ((x
<< 4) | y
);
663 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
681 free_and_replace(*value
, r
);
686 static void skip_address_key(const char **p
) {
690 *p
+= strcspn(*p
, ",");
696 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
697 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
706 while (!IN_SET(**p
, 0, ';')) {
707 r
= parse_address_key(p
, "guid", guid
);
713 r
= parse_address_key(p
, "path", &path
);
719 r
= parse_address_key(p
, "abstract", &abstract
);
728 if (!path
&& !abstract
)
731 if (path
&& abstract
)
736 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
739 b
->sockaddr
.un
= (struct sockaddr_un
) {
740 .sun_family
= AF_UNIX
,
743 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
744 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
749 l
= strlen(abstract
);
750 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
753 b
->sockaddr
.un
= (struct sockaddr_un
) {
754 .sun_family
= AF_UNIX
,
757 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
758 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
766 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
767 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
769 struct addrinfo
*result
, hints
= {
770 .ai_socktype
= SOCK_STREAM
,
771 .ai_flags
= AI_ADDRCONFIG
,
779 while (!IN_SET(**p
, 0, ';')) {
780 r
= parse_address_key(p
, "guid", guid
);
786 r
= parse_address_key(p
, "host", &host
);
792 r
= parse_address_key(p
, "port", &port
);
798 r
= parse_address_key(p
, "family", &family
);
811 if (streq(family
, "ipv4"))
812 hints
.ai_family
= AF_INET
;
813 else if (streq(family
, "ipv6"))
814 hints
.ai_family
= AF_INET6
;
819 r
= getaddrinfo(host
, port
, &hints
, &result
);
823 return -EADDRNOTAVAIL
;
825 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
826 b
->sockaddr_size
= result
->ai_addrlen
;
828 freeaddrinfo(result
);
835 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
837 unsigned n_argv
= 0, j
;
839 size_t allocated
= 0;
847 while (!IN_SET(**p
, 0, ';')) {
848 r
= parse_address_key(p
, "guid", guid
);
854 r
= parse_address_key(p
, "path", &path
);
860 if (startswith(*p
, "argv")) {
864 ul
= strtoul(*p
+ 4, (char**) p
, 10);
865 if (errno
> 0 || **p
!= '=' || ul
> 256) {
873 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
881 r
= parse_address_key(p
, NULL
, argv
+ ul
);
896 /* Make sure there are no holes in the array, with the
897 * exception of argv[0] */
898 for (j
= 1; j
< n_argv
; j
++)
904 if (argv
&& argv
[0] == NULL
) {
905 argv
[0] = strdup(path
);
920 for (j
= 0; j
< n_argv
; j
++)
928 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
929 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
937 while (!IN_SET(**p
, 0, ';')) {
938 r
= parse_address_key(p
, "guid", guid
);
944 r
= parse_address_key(p
, "machine", &machine
);
950 r
= parse_address_key(p
, "pid", &pid
);
959 if (!machine
== !pid
)
963 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
966 free_and_replace(b
->machine
, machine
);
968 b
->machine
= mfree(b
->machine
);
972 r
= parse_pid(pid
, &b
->nspid
);
978 b
->sockaddr
.un
= (struct sockaddr_un
) {
979 .sun_family
= AF_UNIX
,
980 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
981 .sun_path
= "/var/run/dbus/system_bus_socket",
983 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
989 static void bus_reset_parsed_address(sd_bus
*b
) {
993 b
->sockaddr_size
= 0;
994 b
->exec_argv
= strv_free(b
->exec_argv
);
995 b
->exec_path
= mfree(b
->exec_path
);
996 b
->server_id
= SD_ID128_NULL
;
997 b
->machine
= mfree(b
->machine
);
1001 static int bus_parse_next_address(sd_bus
*b
) {
1002 _cleanup_free_
char *guid
= NULL
;
1010 if (b
->address
[b
->address_index
] == 0)
1013 bus_reset_parsed_address(b
);
1015 a
= b
->address
+ b
->address_index
;
1024 if (startswith(a
, "unix:")) {
1027 r
= parse_unix_address(b
, &a
, &guid
);
1032 } else if (startswith(a
, "tcp:")) {
1035 r
= parse_tcp_address(b
, &a
, &guid
);
1041 } else if (startswith(a
, "unixexec:")) {
1044 r
= parse_exec_address(b
, &a
, &guid
);
1050 } else if (startswith(a
, "x-machine-unix:")) {
1053 r
= parse_container_unix_address(b
, &a
, &guid
);
1066 r
= sd_id128_from_string(guid
, &b
->server_id
);
1071 b
->address_index
= a
- b
->address
;
1075 static void bus_kill_exec(sd_bus
*bus
) {
1076 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1077 sigterm_wait(bus
->busexec_pid
);
1078 bus
->busexec_pid
= 0;
1082 static int bus_start_address(sd_bus
*b
) {
1088 bus_close_io_fds(b
);
1089 bus_close_inotify_fd(b
);
1093 /* If you provide multiple different bus-addresses, we
1094 * try all of them in order and use the first one that
1098 r
= bus_socket_exec(b
);
1099 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1100 r
= bus_container_connect_socket(b
);
1101 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1102 r
= bus_socket_connect(b
);
1109 q
= bus_attach_io_events(b
);
1113 q
= bus_attach_inotify_event(b
);
1120 b
->last_connect_error
= -r
;
1123 r
= bus_parse_next_address(b
);
1127 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1131 int bus_next_address(sd_bus
*b
) {
1134 bus_reset_parsed_address(b
);
1135 return bus_start_address(b
);
1138 static int bus_start_fd(sd_bus
*b
) {
1143 assert(b
->input_fd
>= 0);
1144 assert(b
->output_fd
>= 0);
1146 r
= fd_nonblock(b
->input_fd
, true);
1150 r
= fd_cloexec(b
->input_fd
, true);
1154 if (b
->input_fd
!= b
->output_fd
) {
1155 r
= fd_nonblock(b
->output_fd
, true);
1159 r
= fd_cloexec(b
->output_fd
, true);
1164 if (fstat(b
->input_fd
, &st
) < 0)
1167 return bus_socket_take_fd(b
);
1170 _public_
int sd_bus_start(sd_bus
*bus
) {
1173 assert_return(bus
, -EINVAL
);
1174 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1175 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1176 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1178 bus_set_state(bus
, BUS_OPENING
);
1180 if (bus
->is_server
&& bus
->bus_client
)
1183 if (bus
->input_fd
>= 0)
1184 r
= bus_start_fd(bus
);
1185 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1186 r
= bus_start_address(bus
);
1195 return bus_send_hello(bus
);
1198 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1200 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1203 assert_return(ret
, -EINVAL
);
1205 /* Let's connect to the starter bus if it is set, and
1206 * otherwise to the bus that is appropropriate for the scope
1207 * we are running in */
1209 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1211 if (streq(e
, "system"))
1212 return sd_bus_open_system_with_description(ret
, description
);
1213 else if (STR_IN_SET(e
, "session", "user"))
1214 return sd_bus_open_user_with_description(ret
, description
);
1217 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1219 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1220 return sd_bus_open_user_with_description(ret
, description
);
1222 return sd_bus_open_system_with_description(ret
, description
);
1229 r
= sd_bus_set_address(b
, e
);
1233 b
->bus_client
= true;
1235 /* We don't know whether the bus is trusted or not, so better
1236 * be safe, and authenticate everything */
1238 b
->is_local
= false;
1239 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1241 r
= sd_bus_start(b
);
1249 _public_
int sd_bus_open(sd_bus
**ret
) {
1250 return sd_bus_open_with_description(ret
, NULL
);
1253 int bus_set_address_system(sd_bus
*b
) {
1257 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1259 return sd_bus_set_address(b
, e
);
1261 return sd_bus_set_address(b
, DEFAULT_SYSTEM_BUS_ADDRESS
);
1264 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1265 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1268 assert_return(ret
, -EINVAL
);
1275 r
= sd_bus_set_description(b
, description
);
1280 r
= bus_set_address_system(b
);
1284 b
->bus_client
= true;
1285 b
->is_system
= true;
1287 /* Let's do per-method access control on the system bus. We
1288 * need the caller's UID and capability set for that. */
1290 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1293 r
= sd_bus_start(b
);
1301 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1302 return sd_bus_open_system_with_description(ret
, NULL
);
1305 int bus_set_address_user(sd_bus
*b
) {
1307 _cleanup_free_
char *ee
= NULL
, *s
= NULL
;
1311 e
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1313 return sd_bus_set_address(b
, e
);
1315 e
= secure_getenv("XDG_RUNTIME_DIR");
1319 ee
= bus_address_escape(e
);
1323 if (asprintf(&s
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1326 b
->address
= TAKE_PTR(s
);
1331 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1332 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1335 assert_return(ret
, -EINVAL
);
1342 r
= sd_bus_set_description(b
, description
);
1347 r
= bus_set_address_user(b
);
1351 b
->bus_client
= true;
1354 /* We don't do any per-method access control on the user
1359 r
= sd_bus_start(b
);
1367 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1368 return sd_bus_open_user_with_description(ret
, NULL
);
1371 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1372 _cleanup_free_
char *e
= NULL
;
1373 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1378 /* Skip ":"s in ipv6 addresses */
1382 rbracket
= strchr(host
, ']');
1385 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1386 e
= bus_address_escape(t
);
1389 } else if ((a
= strchr(host
, '@'))) {
1390 if (*(a
+ 1) == '[') {
1391 _cleanup_free_
char *t
= NULL
;
1393 rbracket
= strchr(a
+ 1, ']');
1396 t
= new0(char, strlen(host
));
1399 strncat(t
, host
, a
- host
+ 1);
1400 strncat(t
, a
+ 2, rbracket
- a
- 2);
1401 e
= bus_address_escape(t
);
1404 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1408 /* Let's see if a port was given */
1409 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1412 bool got_forward_slash
= false;
1418 p
= strndupa(p
, t
- p
);
1419 got_forward_slash
= true;
1422 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1423 if (!machine_name_is_valid(p
) || got_forward_slash
)
1427 goto interpret_port_as_machine_old_syntax
;
1431 /* Let's see if a machine was given */
1432 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1435 interpret_port_as_machine_old_syntax
:
1436 /* Let's make sure this is not a port of some kind,
1437 * and is a valid machine name. */
1438 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1439 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1445 t
= strndupa(host
, strcspn(host
, ":/"));
1447 e
= bus_address_escape(t
);
1452 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1453 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1454 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1458 return free_and_replace(b
->address
, a
);
1461 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1462 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1465 assert_return(host
, -EINVAL
);
1466 assert_return(ret
, -EINVAL
);
1472 r
= bus_set_address_system_remote(b
, host
);
1476 b
->bus_client
= true;
1478 b
->is_system
= true;
1479 b
->is_local
= false;
1481 r
= sd_bus_start(b
);
1489 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1490 _cleanup_free_
char *e
= NULL
;
1496 e
= bus_address_escape(machine
);
1500 a
= strjoin("x-machine-unix:machine=", e
);
1504 return free_and_replace(b
->address
, a
);
1507 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1508 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1511 assert_return(machine
, -EINVAL
);
1512 assert_return(ret
, -EINVAL
);
1513 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1519 r
= bus_set_address_system_machine(b
, machine
);
1523 b
->bus_client
= true;
1525 b
->is_system
= true;
1526 b
->is_local
= false;
1528 r
= sd_bus_start(b
);
1536 _public_
void sd_bus_close(sd_bus
*bus
) {
1539 if (bus
->state
== BUS_CLOSED
)
1541 if (bus_pid_changed(bus
))
1544 /* Don't leave ssh hanging around */
1547 bus_set_state(bus
, BUS_CLOSED
);
1549 sd_bus_detach_event(bus
);
1551 /* Drop all queued messages so that they drop references to
1552 * the bus object and the bus may be freed */
1553 bus_reset_queues(bus
);
1555 bus_close_io_fds(bus
);
1556 bus_close_inotify_fd(bus
);
1559 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1565 return sd_bus_unref(bus
);
1568 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1572 /* Have to do this before flush() to prevent hang */
1576 return sd_bus_close_unref(bus
);
1579 void bus_enter_closing(sd_bus
*bus
) {
1582 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1585 bus_set_state(bus
, BUS_CLOSING
);
1588 DEFINE_PUBLIC_ATOMIC_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1590 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1591 assert_return(bus
, -EINVAL
);
1592 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1593 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1595 return BUS_IS_OPEN(bus
->state
);
1598 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1599 assert_return(bus
, -EINVAL
);
1600 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1601 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1603 return bus
->state
== BUS_RUNNING
;
1606 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1609 assert_return(bus
, -EINVAL
);
1610 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1611 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1612 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1614 if (bus
->is_monitor
)
1617 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1618 if (!bus
->accept_fd
)
1621 r
= bus_ensure_running(bus
);
1625 return bus
->can_fds
;
1628 return bus_type_is_valid(type
);
1631 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1634 assert_return(bus
, -EINVAL
);
1635 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1636 assert_return(id
, -EINVAL
);
1637 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1639 r
= bus_ensure_running(bus
);
1643 *id
= bus
->server_id
;
1647 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1649 static uint64_t cookie_inc(uint64_t cookie
) {
1651 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1652 if (cookie
>= UINT32_MAX
)
1653 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1654 * whether we are looping. */
1659 static int next_cookie(sd_bus
*b
) {
1660 uint64_t new_cookie
;
1664 new_cookie
= cookie_inc(b
->cookie
);
1666 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1667 * least once, but then do it thorougly. */
1668 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1671 /* Check if the cookie is currently in use. If so, pick the next one */
1672 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1673 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1676 new_cookie
= cookie_inc(new_cookie
);
1679 /* Can't fulfill request */
1684 b
->cookie
= new_cookie
;
1688 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1695 /* If we copy the same message to multiple
1696 * destinations, avoid using the same cookie
1698 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1703 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1708 if (!m
->sender
&& b
->patch_sender
) {
1709 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1718 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1721 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1722 bool remarshal
= false;
1726 /* wrong packet version */
1727 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1730 /* wrong packet endianness */
1731 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1734 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1737 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1741 /* Fake some timestamps, if they were requested, and not
1742 * already initialized */
1743 if (b
->attach_timestamp
) {
1744 if (m
->realtime
<= 0)
1745 m
->realtime
= now(CLOCK_REALTIME
);
1747 if (m
->monotonic
<= 0)
1748 m
->monotonic
= now(CLOCK_MONOTONIC
);
1751 /* The bus specification says the serial number cannot be 0,
1752 * hence let's fill something in for synthetic messages. Since
1753 * synthetic messages might have a fake sender and we don't
1754 * want to interfere with the real sender's serial numbers we
1755 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1756 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1757 * even though kdbus can do 64bit. */
1758 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1761 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1767 r
= bus_socket_write_message(bus
, m
, idx
);
1771 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1772 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",
1773 bus_message_type_to_string(m
->header
->type
),
1774 strna(sd_bus_message_get_sender(m
)),
1775 strna(sd_bus_message_get_destination(m
)),
1776 strna(sd_bus_message_get_path(m
)),
1777 strna(sd_bus_message_get_interface(m
)),
1778 strna(sd_bus_message_get_member(m
)),
1779 BUS_MESSAGE_COOKIE(m
),
1781 strna(m
->root_container
.signature
),
1782 strna(m
->error
.name
),
1783 strna(m
->error
.message
));
1788 static int dispatch_wqueue(sd_bus
*bus
) {
1792 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1794 while (bus
->wqueue_size
> 0) {
1796 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1800 /* Didn't do anything this time */
1802 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1803 /* Fully written. Let's drop the entry from
1806 * This isn't particularly optimized, but
1807 * well, this is supposed to be our worst-case
1808 * buffer only, and the socket buffer is
1809 * supposed to be our primary buffer, and if
1810 * it got full, then all bets are off
1814 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1815 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1825 static int bus_read_message(sd_bus
*bus
, bool hint_priority
, int64_t priority
) {
1828 return bus_socket_read_message(bus
);
1831 int bus_rqueue_make_room(sd_bus
*bus
) {
1834 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1837 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1843 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1845 assert(i
< bus
->rqueue_size
);
1847 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1848 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1852 static int dispatch_rqueue(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**m
) {
1857 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1859 /* Note that the priority logic is only available on kdbus,
1860 * where the rqueue is unused. We check the rqueue here
1861 * anyway, because it's simple... */
1864 if (bus
->rqueue_size
> 0) {
1865 /* Dispatch a queued message */
1866 *m
= sd_bus_message_ref(bus
->rqueue
[0]);
1867 rqueue_drop_one(bus
, 0);
1871 /* Try to read a new message */
1872 r
= bus_read_message(bus
, hint_priority
, priority
);
1884 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1885 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1888 assert_return(m
, -EINVAL
);
1893 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1895 if (!BUS_IS_OPEN(bus
->state
))
1899 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1906 /* If the cookie number isn't kept, then we know that no reply
1908 if (!cookie
&& !m
->sealed
)
1909 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1911 r
= bus_seal_message(bus
, m
, 0);
1915 /* Remarshall if we have to. This will possibly unref the
1916 * message and place a replacement in m */
1917 r
= bus_remarshal_message(bus
, &m
);
1921 /* If this is a reply and no reply was requested, then let's
1922 * suppress this, if we can */
1926 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1929 r
= bus_write_message(bus
, m
, &idx
);
1931 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
1932 bus_enter_closing(bus
);
1939 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1940 /* Wasn't fully written. So let's remember how
1941 * much was written. Note that the first entry
1942 * of the wqueue array is always allocated so
1943 * that we always can remember how much was
1945 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1946 bus
->wqueue_size
= 1;
1951 /* Just append it to the queue. */
1953 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1956 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1959 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1964 *cookie
= BUS_MESSAGE_COOKIE(m
);
1969 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1972 assert_return(m
, -EINVAL
);
1977 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1979 if (!BUS_IS_OPEN(bus
->state
))
1982 if (!streq_ptr(m
->destination
, destination
)) {
1987 r
= sd_bus_message_set_destination(m
, destination
);
1992 return sd_bus_send(bus
, m
, cookie
);
1995 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
1998 if (usec
== (uint64_t) -1)
2001 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2002 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2003 * relative timestamp, and afterwards the absolute one. */
2005 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2008 return now(CLOCK_MONOTONIC
) + usec
;
2011 static int timeout_compare(const void *a
, const void *b
) {
2012 const struct reply_callback
*x
= a
, *y
= b
;
2014 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2017 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2020 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2023 _public_
int sd_bus_call_async(
2027 sd_bus_message_handler_t callback
,
2031 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2032 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2035 assert_return(m
, -EINVAL
);
2036 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2037 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2042 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2044 if (!BUS_IS_OPEN(bus
->state
))
2047 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2048 if (!callback
&& !slot
&& !m
->sealed
)
2049 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2051 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2055 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2059 r
= bus_seal_message(bus
, m
, usec
);
2063 r
= bus_remarshal_message(bus
, &m
);
2067 if (slot
|| callback
) {
2068 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2072 s
->reply_callback
.callback
= callback
;
2074 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2075 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2077 s
->reply_callback
.cookie
= 0;
2081 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2082 if (s
->reply_callback
.timeout_usec
!= 0) {
2083 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2085 s
->reply_callback
.timeout_usec
= 0;
2091 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2102 int bus_ensure_running(sd_bus
*bus
) {
2107 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2109 if (bus
->state
== BUS_RUNNING
)
2113 r
= sd_bus_process(bus
, NULL
);
2116 if (bus
->state
== BUS_RUNNING
)
2121 r
= sd_bus_wait(bus
, (uint64_t) -1);
2127 _public_
int sd_bus_call(
2131 sd_bus_error
*error
,
2132 sd_bus_message
**reply
) {
2134 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2140 bus_assert_return(m
, -EINVAL
, error
);
2141 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2142 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2143 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2148 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2150 if (!BUS_IS_OPEN(bus
->state
)) {
2155 r
= bus_ensure_running(bus
);
2159 i
= bus
->rqueue_size
;
2161 r
= bus_seal_message(bus
, m
, usec
);
2165 r
= bus_remarshal_message(bus
, &m
);
2169 r
= sd_bus_send(bus
, m
, &cookie
);
2173 timeout
= calc_elapse(bus
, m
->timeout
);
2178 while (i
< bus
->rqueue_size
) {
2179 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2181 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2183 if (incoming
->reply_cookie
== cookie
) {
2184 /* Found a match! */
2186 rqueue_drop_one(bus
, i
);
2187 log_debug_bus_message(incoming
);
2189 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2191 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2193 *reply
= TAKE_PTR(incoming
);
2198 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2200 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2201 return sd_bus_error_copy(error
, &incoming
->error
);
2207 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2210 streq(bus
->unique_name
, incoming
->sender
)) {
2212 rqueue_drop_one(bus
, i
);
2214 /* Our own message? Somebody is trying to send its own client a message,
2215 * let's not dead-lock, let's fail immediately. */
2221 /* Try to read more, right-away */
2225 r
= bus_read_message(bus
, false, 0);
2227 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
2228 bus_enter_closing(bus
);
2240 n
= now(CLOCK_MONOTONIC
);
2248 left
= (uint64_t) -1;
2250 r
= bus_poll(bus
, true, left
);
2258 r
= dispatch_wqueue(bus
);
2260 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
2261 bus_enter_closing(bus
);
2270 return sd_bus_error_set_errno(error
, r
);
2273 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2275 assert_return(bus
, -EINVAL
);
2276 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2277 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2278 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2280 if (bus
->state
== BUS_CLOSED
)
2283 if (bus
->inotify_fd
>= 0)
2284 return bus
->inotify_fd
;
2286 if (bus
->input_fd
>= 0)
2287 return bus
->input_fd
;
2292 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2295 assert_return(bus
, -EINVAL
);
2296 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2297 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2299 switch (bus
->state
) {
2305 case BUS_WATCH_BIND
:
2313 case BUS_AUTHENTICATING
:
2314 if (bus_socket_auth_needs_write(bus
))
2322 if (bus
->rqueue_size
<= 0)
2324 if (bus
->wqueue_size
> 0)
2332 assert_not_reached("Unknown state");
2338 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2339 struct reply_callback
*c
;
2341 assert_return(bus
, -EINVAL
);
2342 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2343 assert_return(timeout_usec
, -EINVAL
);
2344 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2346 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2349 if (bus
->track_queue
) {
2354 switch (bus
->state
) {
2356 case BUS_AUTHENTICATING
:
2357 *timeout_usec
= bus
->auth_timeout
;
2362 if (bus
->rqueue_size
> 0) {
2367 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2369 *timeout_usec
= (uint64_t) -1;
2373 if (c
->timeout_usec
== 0) {
2374 *timeout_usec
= (uint64_t) -1;
2378 *timeout_usec
= c
->timeout_usec
;
2385 case BUS_WATCH_BIND
:
2387 *timeout_usec
= (uint64_t) -1;
2391 assert_not_reached("Unknown or unexpected stat");
2395 static int process_timeout(sd_bus
*bus
) {
2396 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2397 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2398 struct reply_callback
*c
;
2405 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2407 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2411 n
= now(CLOCK_MONOTONIC
);
2412 if (c
->timeout_usec
> n
)
2415 r
= bus_message_new_synthetic_error(
2418 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2423 r
= bus_seal_synthetic_message(bus
, m
);
2427 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2428 c
->timeout_usec
= 0;
2430 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2433 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2435 bus
->iteration_counter
++;
2437 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2439 bus
->current_message
= m
;
2440 bus
->current_slot
= sd_bus_slot_ref(slot
);
2441 bus
->current_handler
= c
->callback
;
2442 bus
->current_userdata
= slot
->userdata
;
2443 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2444 bus
->current_userdata
= NULL
;
2445 bus
->current_handler
= NULL
;
2446 bus
->current_slot
= NULL
;
2447 bus
->current_message
= NULL
;
2450 bus_slot_disconnect(slot
, true);
2452 sd_bus_slot_unref(slot
);
2454 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2455 * and ignore the callback handler's return value. */
2459 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2462 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2466 if (bus
->state
!= BUS_HELLO
)
2469 /* Let's make sure the first message on the bus is the HELLO
2470 * reply. But note that we don't actually parse the message
2471 * here (we leave that to the usual handling), we just verify
2472 * we don't let any earlier msg through. */
2474 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2477 if (m
->reply_cookie
!= 1)
2483 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2484 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2485 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2486 struct reply_callback
*c
;
2494 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2497 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2500 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2506 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2508 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2510 /* If the reply contained a file descriptor which we
2511 * didn't want we pass an error instead. */
2513 r
= bus_message_new_synthetic_error(
2516 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2521 /* Copy over original timestamp */
2522 synthetic_reply
->realtime
= m
->realtime
;
2523 synthetic_reply
->monotonic
= m
->monotonic
;
2524 synthetic_reply
->seqnum
= m
->seqnum
;
2526 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2530 m
= synthetic_reply
;
2532 r
= sd_bus_message_rewind(m
, true);
2537 if (c
->timeout_usec
!= 0) {
2538 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2539 c
->timeout_usec
= 0;
2542 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2544 bus
->current_slot
= sd_bus_slot_ref(slot
);
2545 bus
->current_handler
= c
->callback
;
2546 bus
->current_userdata
= slot
->userdata
;
2547 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2548 bus
->current_userdata
= NULL
;
2549 bus
->current_handler
= NULL
;
2550 bus
->current_slot
= NULL
;
2553 bus_slot_disconnect(slot
, true);
2555 sd_bus_slot_unref(slot
);
2557 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2558 * ignore the callback handler's return value. */
2562 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2565 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2566 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2567 struct filter_callback
*l
;
2574 bus
->filter_callbacks_modified
= false;
2576 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2579 if (bus
->filter_callbacks_modified
)
2582 /* Don't run this more than once per iteration */
2583 if (l
->last_iteration
== bus
->iteration_counter
)
2586 l
->last_iteration
= bus
->iteration_counter
;
2588 r
= sd_bus_message_rewind(m
, true);
2592 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2594 bus
->current_slot
= sd_bus_slot_ref(slot
);
2595 bus
->current_handler
= l
->callback
;
2596 bus
->current_userdata
= slot
->userdata
;
2597 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2598 bus
->current_userdata
= NULL
;
2599 bus
->current_handler
= NULL
;
2600 bus
->current_slot
= sd_bus_slot_unref(slot
);
2602 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2608 } while (bus
->filter_callbacks_modified
);
2613 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2620 bus
->match_callbacks_modified
= false;
2622 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2626 } while (bus
->match_callbacks_modified
);
2631 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2632 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2638 if (bus
->is_monitor
)
2641 if (bus
->manual_peer_interface
)
2644 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2647 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2650 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2653 if (streq_ptr(m
->member
, "Ping"))
2654 r
= sd_bus_message_new_method_return(m
, &reply
);
2655 else if (streq_ptr(m
->member
, "GetMachineId")) {
2659 r
= sd_id128_get_machine(&id
);
2663 r
= sd_bus_message_new_method_return(m
, &reply
);
2667 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2669 r
= sd_bus_message_new_method_errorf(
2671 SD_BUS_ERROR_UNKNOWN_METHOD
,
2672 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2677 r
= sd_bus_send(bus
, reply
, NULL
);
2684 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2688 /* If we got a message with a file descriptor which we didn't
2689 * want to accept, then let's drop it. How can this even
2690 * happen? For example, when the kernel queues a message into
2691 * an activatable names's queue which allows fds, and then is
2692 * delivered to us later even though we ourselves did not
2695 if (bus
->is_monitor
)
2704 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2705 return 1; /* just eat it up */
2707 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2710 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2716 bus
->current_message
= m
;
2717 bus
->iteration_counter
++;
2719 log_debug_bus_message(m
);
2721 r
= process_hello(bus
, m
);
2725 r
= process_reply(bus
, m
);
2729 r
= process_fd_check(bus
, m
);
2733 r
= process_filter(bus
, m
);
2737 r
= process_match(bus
, m
);
2741 r
= process_builtin(bus
, m
);
2745 r
= bus_process_object(bus
, m
);
2748 bus
->current_message
= NULL
;
2752 static int dispatch_track(sd_bus
*bus
) {
2755 if (!bus
->track_queue
)
2758 bus_track_dispatch(bus
->track_queue
);
2762 static int process_running(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2763 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2767 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2769 r
= process_timeout(bus
);
2773 r
= dispatch_wqueue(bus
);
2777 r
= dispatch_track(bus
);
2781 r
= dispatch_rqueue(bus
, hint_priority
, priority
, &m
);
2787 r
= process_message(bus
, m
);
2792 r
= sd_bus_message_rewind(m
, true);
2800 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2802 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2803 strna(sd_bus_message_get_sender(m
)),
2804 strna(sd_bus_message_get_path(m
)),
2805 strna(sd_bus_message_get_interface(m
)),
2806 strna(sd_bus_message_get_member(m
)));
2808 r
= sd_bus_reply_method_errorf(
2810 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2811 "Unknown object '%s'.", m
->path
);
2825 static int bus_exit_now(sd_bus
*bus
) {
2828 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2829 * sd_event_exit(), otherwise invokes libc exit(). */
2831 if (bus
->exited
) /* did we already exit? */
2833 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2835 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2838 bus
->exited
= true; /* never exit more than once */
2840 log_debug("Bus connection disconnected, exiting.");
2843 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2847 assert_not_reached("exit() didn't exit?");
2850 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2851 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2852 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2859 r
= bus_message_new_synthetic_error(
2862 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2867 r
= bus_seal_synthetic_message(bus
, m
);
2871 if (c
->timeout_usec
!= 0) {
2872 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2873 c
->timeout_usec
= 0;
2876 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2879 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2881 bus
->iteration_counter
++;
2883 bus
->current_message
= m
;
2884 bus
->current_slot
= sd_bus_slot_ref(slot
);
2885 bus
->current_handler
= c
->callback
;
2886 bus
->current_userdata
= slot
->userdata
;
2887 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2888 bus
->current_userdata
= NULL
;
2889 bus
->current_handler
= NULL
;
2890 bus
->current_slot
= NULL
;
2891 bus
->current_message
= NULL
;
2894 bus_slot_disconnect(slot
, true);
2896 sd_bus_slot_unref(slot
);
2898 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2901 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2902 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2903 struct reply_callback
*c
;
2907 assert(bus
->state
== BUS_CLOSING
);
2909 /* First, fail all outstanding method calls */
2910 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2912 return process_closing_reply_callback(bus
, c
);
2914 /* Then, fake-drop all remaining bus tracking references */
2916 bus_track_close(bus
->tracks
);
2920 /* Then, synthesize a Disconnected message */
2921 r
= sd_bus_message_new_signal(
2924 "/org/freedesktop/DBus/Local",
2925 "org.freedesktop.DBus.Local",
2930 bus_message_set_sender_local(bus
, m
);
2932 r
= bus_seal_synthetic_message(bus
, m
);
2938 bus
->current_message
= m
;
2939 bus
->iteration_counter
++;
2941 r
= process_filter(bus
, m
);
2945 r
= process_match(bus
, m
);
2949 /* Nothing else to do, exit now, if the condition holds */
2950 bus
->exit_triggered
= true;
2951 (void) bus_exit_now(bus
);
2959 bus
->current_message
= NULL
;
2964 static int bus_process_internal(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2967 /* Returns 0 when we didn't do anything. This should cause the
2968 * caller to invoke sd_bus_wait() before returning the next
2969 * time. Returns > 0 when we did something, which possibly
2970 * means *ret is filled in with an unprocessed message. */
2972 assert_return(bus
, -EINVAL
);
2973 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2974 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2976 /* We don't allow recursively invoking sd_bus_process(). */
2977 assert_return(!bus
->current_message
, -EBUSY
);
2978 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
2980 BUS_DONT_DESTROY(bus
);
2982 switch (bus
->state
) {
2990 case BUS_WATCH_BIND
:
2991 r
= bus_socket_process_watch_bind(bus
);
2995 r
= bus_socket_process_opening(bus
);
2998 case BUS_AUTHENTICATING
:
2999 r
= bus_socket_process_authenticating(bus
);
3004 r
= process_running(bus
, hint_priority
, priority
, ret
);
3008 /* This branch initializes *ret, hence we don't use the generic error checking below */
3012 return process_closing(bus
, ret
);
3015 assert_not_reached("Unknown state");
3018 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
3019 bus_enter_closing(bus
);
3030 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3031 return bus_process_internal(bus
, false, 0, ret
);
3034 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3035 return bus_process_internal(bus
, true, priority
, ret
);
3038 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3039 struct pollfd p
[2] = {};
3042 usec_t m
= USEC_INFINITY
;
3046 if (bus
->state
== BUS_CLOSING
)
3049 if (!BUS_IS_OPEN(bus
->state
))
3052 if (bus
->state
== BUS_WATCH_BIND
) {
3053 assert(bus
->inotify_fd
>= 0);
3055 p
[0].events
= POLLIN
;
3056 p
[0].fd
= bus
->inotify_fd
;
3061 e
= sd_bus_get_events(bus
);
3066 /* The caller really needs some more data, he doesn't
3067 * care about what's already read, or any timeouts
3068 * except its own. */
3072 /* The caller wants to process if there's something to
3073 * process, but doesn't care otherwise */
3075 r
= sd_bus_get_timeout(bus
, &until
);
3079 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3082 p
[0].fd
= bus
->input_fd
;
3083 if (bus
->output_fd
== bus
->input_fd
) {
3087 p
[0].events
= e
& POLLIN
;
3088 p
[1].fd
= bus
->output_fd
;
3089 p
[1].events
= e
& POLLOUT
;
3094 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3097 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3101 return r
> 0 ? 1 : 0;
3104 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3106 assert_return(bus
, -EINVAL
);
3107 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3108 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3110 if (bus
->state
== BUS_CLOSING
)
3113 if (!BUS_IS_OPEN(bus
->state
))
3116 if (bus
->rqueue_size
> 0)
3119 return bus_poll(bus
, false, timeout_usec
);
3122 _public_
int sd_bus_flush(sd_bus
*bus
) {
3125 assert_return(bus
, -EINVAL
);
3126 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3127 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3129 if (bus
->state
== BUS_CLOSING
)
3132 if (!BUS_IS_OPEN(bus
->state
))
3135 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3136 if (bus
->state
== BUS_WATCH_BIND
)
3139 r
= bus_ensure_running(bus
);
3143 if (bus
->wqueue_size
<= 0)
3147 r
= dispatch_wqueue(bus
);
3149 if (IN_SET(r
, -ENOTCONN
, -ECONNRESET
, -EPIPE
, -ESHUTDOWN
)) {
3150 bus_enter_closing(bus
);
3157 if (bus
->wqueue_size
<= 0)
3160 r
= bus_poll(bus
, false, (uint64_t) -1);
3166 _public_
int sd_bus_add_filter(
3169 sd_bus_message_handler_t callback
,
3174 assert_return(bus
, -EINVAL
);
3175 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3176 assert_return(callback
, -EINVAL
);
3177 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3179 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3183 s
->filter_callback
.callback
= callback
;
3185 bus
->filter_callbacks_modified
= true;
3186 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3194 static int add_match_callback(
3197 sd_bus_error
*ret_error
) {
3199 sd_bus_slot
*match_slot
= userdata
;
3200 bool failed
= false;
3206 sd_bus_slot_ref(match_slot
);
3208 if (sd_bus_message_is_method_error(m
, NULL
)) {
3209 log_debug_errno(sd_bus_message_get_errno(m
),
3210 "Unable to add match %s, failing connection: %s",
3211 match_slot
->match_callback
.match_string
,
3212 sd_bus_message_get_error(m
)->message
);
3216 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3218 if (match_slot
->match_callback
.install_callback
) {
3221 bus
= sd_bus_message_get_bus(m
);
3223 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3224 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3227 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3228 assert(bus
->current_handler
== add_match_callback
);
3229 assert(bus
->current_userdata
== userdata
);
3231 bus
->current_slot
= match_slot
;
3232 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3233 bus
->current_userdata
= match_slot
->userdata
;
3235 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3237 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3238 bus
->current_handler
= add_match_callback
;
3239 bus
->current_userdata
= userdata
;
3241 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3243 if (failed
) /* Generic failure handling: destroy the connection */
3244 bus_enter_closing(sd_bus_message_get_bus(m
));
3249 if (failed
&& match_slot
->floating
)
3250 bus_slot_disconnect(match_slot
, true);
3252 sd_bus_slot_unref(match_slot
);
3257 static int bus_add_match_full(
3262 sd_bus_message_handler_t callback
,
3263 sd_bus_message_handler_t install_callback
,
3266 struct bus_match_component
*components
= NULL
;
3267 unsigned n_components
= 0;
3268 sd_bus_slot
*s
= NULL
;
3271 assert_return(bus
, -EINVAL
);
3272 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3273 assert_return(match
, -EINVAL
);
3274 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3276 r
= bus_match_parse(match
, &components
, &n_components
);
3280 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3286 s
->match_callback
.callback
= callback
;
3287 s
->match_callback
.install_callback
= install_callback
;
3289 if (bus
->bus_client
) {
3290 enum bus_match_scope scope
;
3292 scope
= bus_match_get_scope(components
, n_components
);
3294 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3295 if (scope
!= BUS_MATCH_LOCAL
) {
3297 /* We store the original match string, so that we can use it to remove the match again. */
3299 s
->match_callback
.match_string
= strdup(match
);
3300 if (!s
->match_callback
.match_string
) {
3306 r
= bus_add_match_internal_async(bus
,
3307 &s
->match_callback
.install_slot
,
3308 s
->match_callback
.match_string
,
3315 /* Make the slot of the match call floating now. We need the reference, but we don't
3316 * want that this match pins the bus object, hence we first create it non-floating, but
3317 * then make it floating. */
3318 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3320 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
);
3324 s
->match_added
= true;
3328 bus
->match_callbacks_modified
= true;
3329 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3338 bus_match_parse_free(components
, n_components
);
3339 sd_bus_slot_unref(s
);
3344 _public_
int sd_bus_add_match(
3348 sd_bus_message_handler_t callback
,
3351 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3354 _public_
int sd_bus_add_match_async(
3358 sd_bus_message_handler_t callback
,
3359 sd_bus_message_handler_t install_callback
,
3362 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3365 bool bus_pid_changed(sd_bus
*bus
) {
3368 /* We don't support people creating a bus connection and
3369 * keeping it around over a fork(). Let's complain. */
3371 return bus
->original_pid
!= getpid_cached();
3374 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3375 sd_bus
*bus
= userdata
;
3380 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3382 r
= sd_bus_process(bus
, NULL
);
3384 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3385 bus_enter_closing(bus
);
3391 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3392 sd_bus
*bus
= userdata
;
3397 r
= sd_bus_process(bus
, NULL
);
3399 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3400 bus_enter_closing(bus
);
3406 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3407 sd_bus
*bus
= userdata
;
3414 e
= sd_bus_get_events(bus
);
3420 if (bus
->output_fd
!= bus
->input_fd
) {
3422 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3426 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3428 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3432 r
= sd_bus_get_timeout(bus
, &until
);
3438 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3445 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3452 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3453 bus_enter_closing(bus
);
3458 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3459 sd_bus
*bus
= userdata
;
3463 if (bus
->close_on_exit
) {
3471 int bus_attach_io_events(sd_bus
*bus
) {
3476 if (bus
->input_fd
< 0)
3482 if (!bus
->input_io_event_source
) {
3483 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3487 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3491 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3495 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3497 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3502 if (bus
->output_fd
!= bus
->input_fd
) {
3503 assert(bus
->output_fd
>= 0);
3505 if (!bus
->output_io_event_source
) {
3506 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3510 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3514 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3516 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3525 static void bus_detach_io_events(sd_bus
*bus
) {
3528 if (bus
->input_io_event_source
) {
3529 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3530 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3533 if (bus
->output_io_event_source
) {
3534 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3535 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3539 int bus_attach_inotify_event(sd_bus
*bus
) {
3544 if (bus
->inotify_fd
< 0)
3550 if (!bus
->inotify_event_source
) {
3551 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3555 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3559 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3561 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3568 static void bus_detach_inotify_event(sd_bus
*bus
) {
3571 if (bus
->inotify_event_source
) {
3572 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3573 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3577 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3580 assert_return(bus
, -EINVAL
);
3581 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3582 assert_return(!bus
->event
, -EBUSY
);
3584 assert(!bus
->input_io_event_source
);
3585 assert(!bus
->output_io_event_source
);
3586 assert(!bus
->time_event_source
);
3589 bus
->event
= sd_event_ref(event
);
3591 r
= sd_event_default(&bus
->event
);
3596 bus
->event_priority
= priority
;
3598 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3602 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3606 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3610 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3614 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3618 r
= bus_attach_io_events(bus
);
3622 r
= bus_attach_inotify_event(bus
);
3629 sd_bus_detach_event(bus
);
3633 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3634 assert_return(bus
, -EINVAL
);
3635 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3640 bus_detach_io_events(bus
);
3641 bus_detach_inotify_event(bus
);
3643 if (bus
->time_event_source
) {
3644 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3645 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3648 if (bus
->quit_event_source
) {
3649 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3650 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3653 bus
->event
= sd_event_unref(bus
->event
);
3657 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3658 assert_return(bus
, NULL
);
3663 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3664 assert_return(bus
, NULL
);
3666 return bus
->current_message
;
3669 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3670 assert_return(bus
, NULL
);
3672 return bus
->current_slot
;
3675 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3676 assert_return(bus
, NULL
);
3678 return bus
->current_handler
;
3681 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3682 assert_return(bus
, NULL
);
3684 return bus
->current_userdata
;
3687 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3692 assert(default_bus
);
3695 return !!*default_bus
;
3698 *ret
= sd_bus_ref(*default_bus
);
3706 b
->default_bus_ptr
= default_bus
;
3714 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3715 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3718 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3719 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3722 _public_
int sd_bus_default(sd_bus
**ret
) {
3723 int (*bus_open
)(sd_bus
**) = NULL
;
3726 busp
= bus_choose_default(&bus_open
);
3727 return bus_default(bus_open
, busp
, ret
);
3730 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3731 assert_return(b
, -EINVAL
);
3732 assert_return(tid
, -EINVAL
);
3733 assert_return(!bus_pid_changed(b
), -ECHILD
);
3741 return sd_event_get_tid(b
->event
, tid
);
3746 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3747 _cleanup_free_
char *e
= NULL
;
3750 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3751 assert_return(external_id
, -EINVAL
);
3752 assert_return(ret_path
, -EINVAL
);
3754 e
= bus_label_escape(external_id
);
3758 ret
= strjoin(prefix
, "/", e
);
3766 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3770 assert_return(object_path_is_valid(path
), -EINVAL
);
3771 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3772 assert_return(external_id
, -EINVAL
);
3774 e
= object_path_startswith(path
, prefix
);
3776 *external_id
= NULL
;
3780 ret
= bus_label_unescape(e
);
3788 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3789 _cleanup_strv_free_
char **labels
= NULL
;
3790 char *path
, *path_pos
, **label_pos
;
3791 const char *sep
, *template_pos
;
3796 assert_return(out
, -EINVAL
);
3797 assert_return(path_template
, -EINVAL
);
3799 path_length
= strlen(path_template
);
3801 va_start(list
, path_template
);
3802 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3806 arg
= va_arg(list
, const char *);
3812 label
= bus_label_escape(arg
);
3818 r
= strv_consume(&labels
, label
);
3824 /* add label length, but account for the format character */
3825 path_length
+= strlen(label
) - 1;
3829 path
= malloc(path_length
+ 1);
3836 for (template_pos
= path_template
; *template_pos
; ) {
3837 sep
= strchrnul(template_pos
, '%');
3838 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3842 path_pos
= stpcpy(path_pos
, *label_pos
++);
3843 template_pos
= sep
+ 1;
3851 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3852 _cleanup_strv_free_
char **labels
= NULL
;
3853 const char *template_pos
, *path_pos
;
3859 * This decodes an object-path based on a template argument. The
3860 * template consists of a verbatim path, optionally including special
3863 * - Each occurrence of '%' in the template matches an arbitrary
3864 * substring of a label in the given path. At most one such
3865 * directive is allowed per label. For each such directive, the
3866 * caller must provide an output parameter (char **) via va_arg. If
3867 * NULL is passed, the given label is verified, but not returned.
3868 * For each matched label, the *decoded* label is stored in the
3869 * passed output argument, and the caller is responsible to free
3870 * it. Note that the output arguments are only modified if the
3871 * actualy path matched the template. Otherwise, they're left
3874 * This function returns <0 on error, 0 if the path does not match the
3875 * template, 1 if it matched.
3878 assert_return(path
, -EINVAL
);
3879 assert_return(path_template
, -EINVAL
);
3883 for (template_pos
= path_template
; *template_pos
; ) {
3888 /* verify everything until the next '%' matches verbatim */
3889 sep
= strchrnul(template_pos
, '%');
3890 length
= sep
- template_pos
;
3891 if (strncmp(path_pos
, template_pos
, length
))
3895 template_pos
+= length
;
3900 /* We found the next '%' character. Everything up until here
3901 * matched. We now skip ahead to the end of this label and make
3902 * sure it matches the tail of the label in the path. Then we
3903 * decode the string in-between and save it for later use. */
3905 ++template_pos
; /* skip over '%' */
3907 sep
= strchrnul(template_pos
, '/');
3908 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3910 /* verify the suffixes match */
3911 sep
= strchrnul(path_pos
, '/');
3912 if (sep
- path_pos
< (ssize_t
)length
||
3913 strncmp(sep
- length
, template_pos
, length
))
3916 template_pos
+= length
; /* skip over matched label */
3917 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3919 /* store unescaped label for later use */
3920 label
= bus_label_unescape_n(path_pos
, length
);
3924 r
= strv_consume(&labels
, label
);
3928 path_pos
= sep
; /* skip decoded label and suffix */
3931 /* end of template must match end of path */
3935 /* copy the labels over to the caller */
3936 va_start(list
, path_template
);
3937 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3940 arg
= va_arg(list
, char **);
3948 labels
= mfree(labels
);
3952 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3953 assert_return(bus
, -EINVAL
);
3954 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3955 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3960 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3961 assert_return(bus
, -EINVAL
);
3962 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3963 assert_return(description
, -EINVAL
);
3964 assert_return(bus
->description
, -ENXIO
);
3965 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3967 if (bus
->description
)
3968 *description
= bus
->description
;
3969 else if (bus
->is_system
)
3970 *description
= "system";
3971 else if (bus
->is_user
)
3972 *description
= "user";
3974 *description
= NULL
;
3979 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
3980 assert_return(bus
, -EINVAL
);
3981 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3982 assert_return(scope
, -EINVAL
);
3983 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3990 if (bus
->is_system
) {
3998 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4000 assert_return(bus
, -EINVAL
);
4001 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4002 assert_return(address
, -EINVAL
);
4003 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4006 *address
= bus
->address
;
4013 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4014 assert_return(bus
, -EINVAL
);
4015 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4016 assert_return(mask
, -EINVAL
);
4017 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4019 *mask
= bus
->creds_mask
;
4023 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4024 assert_return(bus
, -EINVAL
);
4025 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4026 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4028 return bus
->bus_client
;
4031 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4032 assert_return(bus
, -EINVAL
);
4033 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4034 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4036 return bus
->is_server
;
4039 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4040 assert_return(bus
, -EINVAL
);
4041 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4042 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4044 return bus
->anonymous_auth
;
4047 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4048 assert_return(bus
, -EINVAL
);
4049 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4050 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4052 return bus
->trusted
;
4055 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4056 assert_return(bus
, -EINVAL
);
4057 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4058 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4060 return bus
->is_monitor
;
4063 static void flush_close(sd_bus
*bus
) {
4067 /* Flushes and closes the specified bus. We take a ref before,
4068 * to ensure the flushing does not cause the bus to be
4071 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4074 _public_
void sd_bus_default_flush_close(void) {
4075 flush_close(default_starter_bus
);
4076 flush_close(default_user_bus
);
4077 flush_close(default_system_bus
);
4080 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4081 assert_return(bus
, -EINVAL
);
4082 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4084 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4085 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4086 * from the client side. */
4087 bus
->exit_on_disconnect
= b
;
4089 /* If the exit condition was triggered already, exit immediately. */
4090 return bus_exit_now(bus
);
4093 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4094 assert_return(bus
, -EINVAL
);
4095 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4097 return bus
->exit_on_disconnect
;
4100 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4101 assert_return(bus
, -EINVAL
);
4102 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4103 assert_return(!bus
->bus_client
, -EPERM
);
4104 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4106 return free_and_strdup(&bus
->patch_sender
, sender
);
4109 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4110 assert_return(bus
, -EINVAL
);
4111 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4112 assert_return(ret
, -EINVAL
);
4114 if (!bus
->patch_sender
)
4117 *ret
= bus
->patch_sender
;
4121 _public_
int sd_bus_get_n_queued_read(sd_bus
*bus
, uint64_t *ret
) {
4122 assert_return(bus
, -EINVAL
);
4123 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4124 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4125 assert_return(ret
, -EINVAL
);
4127 *ret
= bus
->rqueue_size
;
4131 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4132 assert_return(bus
, -EINVAL
);
4133 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4134 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4135 assert_return(ret
, -EINVAL
);
4137 *ret
= bus
->wqueue_size
;
4141 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4142 assert_return(bus
, -EINVAL
);
4143 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4145 bus
->method_call_timeout
= usec
;
4149 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4153 assert_return(bus
, -EINVAL
);
4154 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4155 assert_return(ret
, -EINVAL
);
4157 if (bus
->method_call_timeout
!= 0) {
4158 *ret
= bus
->method_call_timeout
;
4162 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4163 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4164 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4165 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4166 *ret
= bus
->method_call_timeout
= usec
;
4170 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4174 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4175 assert_return(bus
, -EINVAL
);
4176 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4178 bus
->close_on_exit
= b
;
4182 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4183 assert_return(bus
, -EINVAL
);
4184 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4186 return bus
->close_on_exit
;