1 /* SPDX-License-Identifier: LGPL-2.1+ */
16 #include "alloc-util.h"
17 #include "bus-container.h"
18 #include "bus-control.h"
19 #include "bus-internal.h"
20 #include "bus-kernel.h"
21 #include "bus-label.h"
22 #include "bus-message.h"
23 #include "bus-objects.h"
24 #include "bus-protocol.h"
26 #include "bus-socket.h"
27 #include "bus-track.h"
30 #include "cgroup-util.h"
32 #include "errno-util.h"
34 #include "hexdecoct.h"
35 #include "hostname-util.h"
37 #include "memory-util.h"
38 #include "missing_syscall.h"
39 #include "parse-util.h"
40 #include "path-util.h"
41 #include "process-util.h"
42 #include "string-util.h"
45 #define log_debug_bus_message(m) \
47 sd_bus_message *_mm = (m); \
48 log_debug("Got message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s", \
49 bus_message_type_to_string(_mm->header->type), \
50 strna(sd_bus_message_get_sender(_mm)), \
51 strna(sd_bus_message_get_destination(_mm)), \
52 strna(sd_bus_message_get_path(_mm)), \
53 strna(sd_bus_message_get_interface(_mm)), \
54 strna(sd_bus_message_get_member(_mm)), \
55 BUS_MESSAGE_COOKIE(_mm), \
57 strna(_mm->root_container.signature), \
58 strna(_mm->error.name), \
59 strna(_mm->error.message)); \
62 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
);
63 static void bus_detach_io_events(sd_bus
*b
);
64 static void bus_detach_inotify_event(sd_bus
*b
);
66 static thread_local sd_bus
*default_system_bus
= NULL
;
67 static thread_local sd_bus
*default_user_bus
= NULL
;
68 static thread_local sd_bus
*default_starter_bus
= NULL
;
70 static sd_bus
**bus_choose_default(int (**bus_open
)(sd_bus
**)) {
73 /* Let's try our best to reuse another cached connection. If
74 * the starter bus type is set, connect via our normal
75 * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that
76 * we can share the connection with the user/system default
79 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
81 if (streq(e
, "system")) {
83 *bus_open
= sd_bus_open_system
;
84 return &default_system_bus
;
85 } else if (STR_IN_SET(e
, "user", "session")) {
87 *bus_open
= sd_bus_open_user
;
88 return &default_user_bus
;
92 /* No type is specified, so we have not other option than to
93 * use the starter address if it is set. */
94 e
= secure_getenv("DBUS_STARTER_ADDRESS");
97 *bus_open
= sd_bus_open
;
98 return &default_starter_bus
;
101 /* Finally, if nothing is set use the cached connection for
104 if (cg_pid_get_owner_uid(0, NULL
) >= 0) {
106 *bus_open
= sd_bus_open_user
;
107 return &default_user_bus
;
110 *bus_open
= sd_bus_open_system
;
111 return &default_system_bus
;
115 sd_bus
*bus_resolve(sd_bus
*bus
) {
116 switch ((uintptr_t) bus
) {
117 case (uintptr_t) SD_BUS_DEFAULT
:
118 return *(bus_choose_default(NULL
));
119 case (uintptr_t) SD_BUS_DEFAULT_USER
:
120 return default_user_bus
;
121 case (uintptr_t) SD_BUS_DEFAULT_SYSTEM
:
122 return default_system_bus
;
128 void bus_close_io_fds(sd_bus
*b
) {
131 bus_detach_io_events(b
);
133 if (b
->input_fd
!= b
->output_fd
)
134 safe_close(b
->output_fd
);
135 b
->output_fd
= b
->input_fd
= safe_close(b
->input_fd
);
138 void bus_close_inotify_fd(sd_bus
*b
) {
141 bus_detach_inotify_event(b
);
143 b
->inotify_fd
= safe_close(b
->inotify_fd
);
144 b
->inotify_watches
= mfree(b
->inotify_watches
);
145 b
->n_inotify_watches
= 0;
148 static void bus_reset_queues(sd_bus
*b
) {
151 while (b
->rqueue_size
> 0)
152 bus_message_unref_queued(b
->rqueue
[--b
->rqueue_size
], b
);
154 b
->rqueue
= mfree(b
->rqueue
);
155 b
->rqueue_allocated
= 0;
157 while (b
->wqueue_size
> 0)
158 bus_message_unref_queued(b
->wqueue
[--b
->wqueue_size
], b
);
160 b
->wqueue
= mfree(b
->wqueue
);
161 b
->wqueue_allocated
= 0;
164 static sd_bus
* bus_free(sd_bus
*b
) {
168 assert(!b
->track_queue
);
171 b
->state
= BUS_CLOSED
;
173 sd_bus_detach_event(b
);
175 while ((s
= b
->slots
)) {
176 /* At this point only floating slots can still be
177 * around, because the non-floating ones keep a
178 * reference to the bus, and we thus couldn't be
179 * destructing right now... We forcibly disconnect the
180 * slots here, so that they still can be referenced by
181 * apps, but are dead. */
184 bus_slot_disconnect(s
, true);
187 if (b
->default_bus_ptr
)
188 *b
->default_bus_ptr
= NULL
;
191 bus_close_inotify_fd(b
);
196 free(b
->unique_name
);
197 free(b
->auth_buffer
);
200 free(b
->description
);
201 free(b
->patch_sender
);
204 strv_free(b
->exec_argv
);
206 close_many(b
->fds
, b
->n_fds
);
211 ordered_hashmap_free_free(b
->reply_callbacks
);
212 prioq_free(b
->reply_callbacks_prioq
);
214 assert(b
->match_callbacks
.type
== BUS_MATCH_ROOT
);
215 bus_match_free(&b
->match_callbacks
);
217 hashmap_free_free(b
->vtable_methods
);
218 hashmap_free_free(b
->vtable_properties
);
220 assert(hashmap_isempty(b
->nodes
));
221 hashmap_free(b
->nodes
);
225 assert_se(pthread_mutex_destroy(&b
->memfd_cache_mutex
) == 0);
230 DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus
*, bus_free
);
232 _public_
int sd_bus_new(sd_bus
**ret
) {
233 _cleanup_free_ sd_bus
*b
= NULL
;
235 assert_return(ret
, -EINVAL
);
246 .message_version
= 1,
247 .creds_mask
= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
,
249 .original_pid
= getpid_cached(),
250 .n_groups
= (size_t) -1,
251 .close_on_exit
= true,
254 /* We guarantee that wqueue always has space for at least one entry */
255 if (!GREEDY_REALLOC(b
->wqueue
, b
->wqueue_allocated
, 1))
258 assert_se(pthread_mutex_init(&b
->memfd_cache_mutex
, NULL
) == 0);
264 _public_
int sd_bus_set_address(sd_bus
*bus
, const char *address
) {
265 assert_return(bus
, -EINVAL
);
266 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
267 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
268 assert_return(address
, -EINVAL
);
269 assert_return(!bus_pid_changed(bus
), -ECHILD
);
271 return free_and_strdup(&bus
->address
, address
);
274 _public_
int sd_bus_set_fd(sd_bus
*bus
, int input_fd
, int output_fd
) {
275 assert_return(bus
, -EINVAL
);
276 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
277 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
278 assert_return(input_fd
>= 0, -EBADF
);
279 assert_return(output_fd
>= 0, -EBADF
);
280 assert_return(!bus_pid_changed(bus
), -ECHILD
);
282 bus
->input_fd
= input_fd
;
283 bus
->output_fd
= output_fd
;
287 _public_
int sd_bus_set_exec(sd_bus
*bus
, const char *path
, char *const argv
[]) {
288 _cleanup_strv_free_
char **a
= NULL
;
291 assert_return(bus
, -EINVAL
);
292 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
293 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
294 assert_return(path
, -EINVAL
);
295 assert_return(!strv_isempty(argv
), -EINVAL
);
296 assert_return(!bus_pid_changed(bus
), -ECHILD
);
302 r
= free_and_strdup(&bus
->exec_path
, path
);
306 return strv_free_and_replace(bus
->exec_argv
, a
);
309 _public_
int sd_bus_set_bus_client(sd_bus
*bus
, int b
) {
310 assert_return(bus
, -EINVAL
);
311 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
312 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
313 assert_return(!bus
->patch_sender
, -EPERM
);
314 assert_return(!bus_pid_changed(bus
), -ECHILD
);
316 bus
->bus_client
= !!b
;
320 _public_
int sd_bus_set_monitor(sd_bus
*bus
, int b
) {
321 assert_return(bus
, -EINVAL
);
322 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
323 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
324 assert_return(!bus_pid_changed(bus
), -ECHILD
);
326 bus
->is_monitor
= !!b
;
330 _public_
int sd_bus_negotiate_fds(sd_bus
*bus
, int b
) {
331 assert_return(bus
, -EINVAL
);
332 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
333 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
334 assert_return(!bus_pid_changed(bus
), -ECHILD
);
336 bus
->accept_fd
= !!b
;
340 _public_
int sd_bus_negotiate_timestamp(sd_bus
*bus
, int b
) {
341 assert_return(bus
, -EINVAL
);
342 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
343 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
344 assert_return(!bus_pid_changed(bus
), -ECHILD
);
346 /* This is not actually supported by any of our transports these days, but we do honour it for synthetic
347 * replies, and maybe one day classic D-Bus learns this too */
348 bus
->attach_timestamp
= !!b
;
353 _public_
int sd_bus_negotiate_creds(sd_bus
*bus
, int b
, uint64_t mask
) {
354 assert_return(bus
, -EINVAL
);
355 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
356 assert_return(mask
<= _SD_BUS_CREDS_ALL
, -EINVAL
);
357 assert_return(!IN_SET(bus
->state
, BUS_CLOSING
, BUS_CLOSED
), -EPERM
);
358 assert_return(!bus_pid_changed(bus
), -ECHILD
);
360 SET_FLAG(bus
->creds_mask
, mask
, b
);
362 /* The well knowns we need unconditionally, so that matches can work */
363 bus
->creds_mask
|= SD_BUS_CREDS_WELL_KNOWN_NAMES
|SD_BUS_CREDS_UNIQUE_NAME
;
368 _public_
int sd_bus_set_server(sd_bus
*bus
, int b
, sd_id128_t server_id
) {
369 assert_return(bus
, -EINVAL
);
370 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
371 assert_return(b
|| sd_id128_equal(server_id
, SD_ID128_NULL
), -EINVAL
);
372 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
373 assert_return(!bus_pid_changed(bus
), -ECHILD
);
375 bus
->is_server
= !!b
;
376 bus
->server_id
= server_id
;
380 _public_
int sd_bus_set_anonymous(sd_bus
*bus
, int b
) {
381 assert_return(bus
, -EINVAL
);
382 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
383 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
384 assert_return(!bus_pid_changed(bus
), -ECHILD
);
386 bus
->anonymous_auth
= !!b
;
390 _public_
int sd_bus_set_trusted(sd_bus
*bus
, int b
) {
391 assert_return(bus
, -EINVAL
);
392 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
393 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
394 assert_return(!bus_pid_changed(bus
), -ECHILD
);
400 _public_
int sd_bus_set_description(sd_bus
*bus
, const char *description
) {
401 assert_return(bus
, -EINVAL
);
402 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
403 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
404 assert_return(!bus_pid_changed(bus
), -ECHILD
);
406 return free_and_strdup(&bus
->description
, description
);
409 _public_
int sd_bus_set_allow_interactive_authorization(sd_bus
*bus
, int b
) {
410 assert_return(bus
, -EINVAL
);
411 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
412 assert_return(!bus_pid_changed(bus
), -ECHILD
);
414 bus
->allow_interactive_authorization
= !!b
;
418 _public_
int sd_bus_get_allow_interactive_authorization(sd_bus
*bus
) {
419 assert_return(bus
, -EINVAL
);
420 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
421 assert_return(!bus_pid_changed(bus
), -ECHILD
);
423 return bus
->allow_interactive_authorization
;
426 _public_
int sd_bus_set_watch_bind(sd_bus
*bus
, int b
) {
427 assert_return(bus
, -EINVAL
);
428 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
429 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
430 assert_return(!bus_pid_changed(bus
), -ECHILD
);
432 bus
->watch_bind
= !!b
;
436 _public_
int sd_bus_get_watch_bind(sd_bus
*bus
) {
437 assert_return(bus
, -EINVAL
);
438 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
439 assert_return(!bus_pid_changed(bus
), -ECHILD
);
441 return bus
->watch_bind
;
444 _public_
int sd_bus_set_connected_signal(sd_bus
*bus
, int b
) {
445 assert_return(bus
, -EINVAL
);
446 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
447 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
448 assert_return(!bus_pid_changed(bus
), -ECHILD
);
450 bus
->connected_signal
= !!b
;
454 _public_
int sd_bus_get_connected_signal(sd_bus
*bus
) {
455 assert_return(bus
, -EINVAL
);
456 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
457 assert_return(!bus_pid_changed(bus
), -ECHILD
);
459 return bus
->connected_signal
;
462 static int synthesize_connected_signal(sd_bus
*bus
) {
463 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
468 /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called
469 * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the
470 * Hello() reply. Or in other words, whenever we enter BUS_RUNNING state.
472 * This is useful so that clients can start doing stuff whenever the connection is fully established in a way
473 * that works independently from whether we connected to a full bus or just a direct connection. */
475 if (!bus
->connected_signal
)
478 r
= sd_bus_message_new_signal(
481 "/org/freedesktop/DBus/Local",
482 "org.freedesktop.DBus.Local",
487 bus_message_set_sender_local(bus
, m
);
488 m
->read_counter
= ++bus
->read_counter
;
490 r
= bus_seal_synthetic_message(bus
, m
);
494 r
= bus_rqueue_make_room(bus
);
498 /* Insert at the very front */
499 memmove(bus
->rqueue
+ 1, bus
->rqueue
, sizeof(sd_bus_message
*) * bus
->rqueue_size
);
500 bus
->rqueue
[0] = bus_message_ref_queued(m
, bus
);
506 void bus_set_state(sd_bus
*bus
, enum bus_state state
) {
508 static const char * const table
[_BUS_STATE_MAX
] = {
509 [BUS_UNSET
] = "UNSET",
510 [BUS_WATCH_BIND
] = "WATCH_BIND",
511 [BUS_OPENING
] = "OPENING",
512 [BUS_AUTHENTICATING
] = "AUTHENTICATING",
513 [BUS_HELLO
] = "HELLO",
514 [BUS_RUNNING
] = "RUNNING",
515 [BUS_CLOSING
] = "CLOSING",
516 [BUS_CLOSED
] = "CLOSED",
520 assert(state
< _BUS_STATE_MAX
);
522 if (state
== bus
->state
)
525 log_debug("Bus %s: changing state %s → %s", strna(bus
->description
), table
[bus
->state
], table
[state
]);
529 static int hello_callback(sd_bus_message
*reply
, void *userdata
, sd_bus_error
*error
) {
537 assert(IN_SET(bus
->state
, BUS_HELLO
, BUS_CLOSING
));
539 r
= sd_bus_message_get_errno(reply
);
543 r
= sd_bus_message_read(reply
, "s", &s
);
547 if (!service_name_is_valid(s
) || s
[0] != ':')
550 r
= free_and_strdup(&bus
->unique_name
, s
);
554 if (bus
->state
== BUS_HELLO
) {
555 bus_set_state(bus
, BUS_RUNNING
);
557 r
= synthesize_connected_signal(bus
);
565 static int bus_send_hello(sd_bus
*bus
) {
566 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
571 if (!bus
->bus_client
)
574 r
= sd_bus_message_new_method_call(
577 "org.freedesktop.DBus",
578 "/org/freedesktop/DBus",
579 "org.freedesktop.DBus",
584 return sd_bus_call_async(bus
, NULL
, m
, hello_callback
, NULL
, 0);
587 int bus_start_running(sd_bus
*bus
) {
588 struct reply_callback
*c
;
594 assert(bus
->state
< BUS_HELLO
);
596 /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert
597 * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since
598 * adding a fixed value to all entries should not alter the internal order. */
600 n
= now(CLOCK_MONOTONIC
);
601 ORDERED_HASHMAP_FOREACH(c
, bus
->reply_callbacks
, i
) {
602 if (c
->timeout_usec
== 0)
605 c
->timeout_usec
= usec_add(n
, c
->timeout_usec
);
608 if (bus
->bus_client
) {
609 bus_set_state(bus
, BUS_HELLO
);
613 bus_set_state(bus
, BUS_RUNNING
);
615 r
= synthesize_connected_signal(bus
);
622 static int parse_address_key(const char **p
, const char *key
, char **value
) {
623 size_t l
, n
= 0, allocated
= 0;
624 _cleanup_free_
char *r
= NULL
;
633 if (strncmp(*p
, key
, l
) != 0)
646 while (!IN_SET(*a
, ';', ',', 0)) {
660 c
= (char) ((x
<< 4) | y
);
667 if (!GREEDY_REALLOC(r
, allocated
, n
+ 2))
685 free_and_replace(*value
, r
);
690 static void skip_address_key(const char **p
) {
694 *p
+= strcspn(*p
, ",");
700 static int parse_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
701 _cleanup_free_
char *path
= NULL
, *abstract
= NULL
;
710 while (!IN_SET(**p
, 0, ';')) {
711 r
= parse_address_key(p
, "guid", guid
);
717 r
= parse_address_key(p
, "path", &path
);
723 r
= parse_address_key(p
, "abstract", &abstract
);
732 if (!path
&& !abstract
)
735 if (path
&& abstract
)
740 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
)) /* We insist on NUL termination */
743 b
->sockaddr
.un
= (struct sockaddr_un
) {
744 .sun_family
= AF_UNIX
,
747 memcpy(b
->sockaddr
.un
.sun_path
, path
, l
);
748 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + l
+ 1;
753 l
= strlen(abstract
);
754 if (l
>= sizeof(b
->sockaddr
.un
.sun_path
) - 1) /* We insist on NUL termination */
757 b
->sockaddr
.un
= (struct sockaddr_un
) {
758 .sun_family
= AF_UNIX
,
761 memcpy(b
->sockaddr
.un
.sun_path
+1, abstract
, l
);
762 b
->sockaddr_size
= offsetof(struct sockaddr_un
, sun_path
) + 1 + l
;
770 static int parse_tcp_address(sd_bus
*b
, const char **p
, char **guid
) {
771 _cleanup_free_
char *host
= NULL
, *port
= NULL
, *family
= NULL
;
773 struct addrinfo
*result
, hints
= {
774 .ai_socktype
= SOCK_STREAM
,
775 .ai_flags
= AI_ADDRCONFIG
,
783 while (!IN_SET(**p
, 0, ';')) {
784 r
= parse_address_key(p
, "guid", guid
);
790 r
= parse_address_key(p
, "host", &host
);
796 r
= parse_address_key(p
, "port", &port
);
802 r
= parse_address_key(p
, "family", &family
);
815 if (streq(family
, "ipv4"))
816 hints
.ai_family
= AF_INET
;
817 else if (streq(family
, "ipv6"))
818 hints
.ai_family
= AF_INET6
;
823 r
= getaddrinfo(host
, port
, &hints
, &result
);
827 return -EADDRNOTAVAIL
;
829 memcpy(&b
->sockaddr
, result
->ai_addr
, result
->ai_addrlen
);
830 b
->sockaddr_size
= result
->ai_addrlen
;
832 freeaddrinfo(result
);
839 static int parse_exec_address(sd_bus
*b
, const char **p
, char **guid
) {
841 unsigned n_argv
= 0, j
;
843 size_t allocated
= 0;
851 while (!IN_SET(**p
, 0, ';')) {
852 r
= parse_address_key(p
, "guid", guid
);
858 r
= parse_address_key(p
, "path", &path
);
864 if (startswith(*p
, "argv")) {
868 ul
= strtoul(*p
+ 4, (char**) p
, 10);
869 if (errno
> 0 || **p
!= '=' || ul
> 256) {
877 if (!GREEDY_REALLOC0(argv
, allocated
, ul
+ 2)) {
885 r
= parse_address_key(p
, NULL
, argv
+ ul
);
900 /* Make sure there are no holes in the array, with the
901 * exception of argv[0] */
902 for (j
= 1; j
< n_argv
; j
++)
908 if (argv
&& argv
[0] == NULL
) {
909 argv
[0] = strdup(path
);
924 for (j
= 0; j
< n_argv
; j
++)
932 static int parse_container_unix_address(sd_bus
*b
, const char **p
, char **guid
) {
933 _cleanup_free_
char *machine
= NULL
, *pid
= NULL
;
941 while (!IN_SET(**p
, 0, ';')) {
942 r
= parse_address_key(p
, "guid", guid
);
948 r
= parse_address_key(p
, "machine", &machine
);
954 r
= parse_address_key(p
, "pid", &pid
);
963 if (!machine
== !pid
)
967 if (!streq(machine
, ".host") && !machine_name_is_valid(machine
))
970 free_and_replace(b
->machine
, machine
);
972 b
->machine
= mfree(b
->machine
);
976 r
= parse_pid(pid
, &b
->nspid
);
982 b
->sockaddr
.un
= (struct sockaddr_un
) {
983 .sun_family
= AF_UNIX
,
984 /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */
985 .sun_path
= "/var/run/dbus/system_bus_socket",
987 b
->sockaddr_size
= SOCKADDR_UN_LEN(b
->sockaddr
.un
);
993 static void bus_reset_parsed_address(sd_bus
*b
) {
997 b
->sockaddr_size
= 0;
998 b
->exec_argv
= strv_free(b
->exec_argv
);
999 b
->exec_path
= mfree(b
->exec_path
);
1000 b
->server_id
= SD_ID128_NULL
;
1001 b
->machine
= mfree(b
->machine
);
1005 static int bus_parse_next_address(sd_bus
*b
) {
1006 _cleanup_free_
char *guid
= NULL
;
1014 if (b
->address
[b
->address_index
] == 0)
1017 bus_reset_parsed_address(b
);
1019 a
= b
->address
+ b
->address_index
;
1028 if (startswith(a
, "unix:")) {
1031 r
= parse_unix_address(b
, &a
, &guid
);
1036 } else if (startswith(a
, "tcp:")) {
1039 r
= parse_tcp_address(b
, &a
, &guid
);
1045 } else if (startswith(a
, "unixexec:")) {
1048 r
= parse_exec_address(b
, &a
, &guid
);
1054 } else if (startswith(a
, "x-machine-unix:")) {
1057 r
= parse_container_unix_address(b
, &a
, &guid
);
1070 r
= sd_id128_from_string(guid
, &b
->server_id
);
1075 b
->address_index
= a
- b
->address
;
1079 static void bus_kill_exec(sd_bus
*bus
) {
1080 if (pid_is_valid(bus
->busexec_pid
) > 0) {
1081 sigterm_wait(bus
->busexec_pid
);
1082 bus
->busexec_pid
= 0;
1086 static int bus_start_address(sd_bus
*b
) {
1092 bus_close_io_fds(b
);
1093 bus_close_inotify_fd(b
);
1097 /* If you provide multiple different bus-addresses, we
1098 * try all of them in order and use the first one that
1102 r
= bus_socket_exec(b
);
1103 else if ((b
->nspid
> 0 || b
->machine
) && b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1104 r
= bus_container_connect_socket(b
);
1105 else if (b
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
)
1106 r
= bus_socket_connect(b
);
1113 q
= bus_attach_io_events(b
);
1117 q
= bus_attach_inotify_event(b
);
1124 b
->last_connect_error
= -r
;
1127 r
= bus_parse_next_address(b
);
1131 return b
->last_connect_error
> 0 ? -b
->last_connect_error
: -ECONNREFUSED
;
1135 int bus_next_address(sd_bus
*b
) {
1138 bus_reset_parsed_address(b
);
1139 return bus_start_address(b
);
1142 static int bus_start_fd(sd_bus
*b
) {
1147 assert(b
->input_fd
>= 0);
1148 assert(b
->output_fd
>= 0);
1150 r
= fd_nonblock(b
->input_fd
, true);
1154 r
= fd_cloexec(b
->input_fd
, true);
1158 if (b
->input_fd
!= b
->output_fd
) {
1159 r
= fd_nonblock(b
->output_fd
, true);
1163 r
= fd_cloexec(b
->output_fd
, true);
1168 if (fstat(b
->input_fd
, &st
) < 0)
1171 return bus_socket_take_fd(b
);
1174 _public_
int sd_bus_start(sd_bus
*bus
) {
1177 assert_return(bus
, -EINVAL
);
1178 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1179 assert_return(bus
->state
== BUS_UNSET
, -EPERM
);
1180 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1182 bus_set_state(bus
, BUS_OPENING
);
1184 if (bus
->is_server
&& bus
->bus_client
)
1187 if (bus
->input_fd
>= 0)
1188 r
= bus_start_fd(bus
);
1189 else if (bus
->address
|| bus
->sockaddr
.sa
.sa_family
!= AF_UNSPEC
|| bus
->exec_path
|| bus
->machine
)
1190 r
= bus_start_address(bus
);
1199 return bus_send_hello(bus
);
1202 _public_
int sd_bus_open_with_description(sd_bus
**ret
, const char *description
) {
1204 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1207 assert_return(ret
, -EINVAL
);
1209 /* Let's connect to the starter bus if it is set, and
1210 * otherwise to the bus that is appropriate for the scope
1211 * we are running in */
1213 e
= secure_getenv("DBUS_STARTER_BUS_TYPE");
1215 if (streq(e
, "system"))
1216 return sd_bus_open_system_with_description(ret
, description
);
1217 else if (STR_IN_SET(e
, "session", "user"))
1218 return sd_bus_open_user_with_description(ret
, description
);
1221 e
= secure_getenv("DBUS_STARTER_ADDRESS");
1223 if (cg_pid_get_owner_uid(0, NULL
) >= 0)
1224 return sd_bus_open_user_with_description(ret
, description
);
1226 return sd_bus_open_system_with_description(ret
, description
);
1233 r
= sd_bus_set_address(b
, e
);
1237 b
->bus_client
= true;
1239 /* We don't know whether the bus is trusted or not, so better
1240 * be safe, and authenticate everything */
1242 b
->is_local
= false;
1243 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1245 r
= sd_bus_start(b
);
1253 _public_
int sd_bus_open(sd_bus
**ret
) {
1254 return sd_bus_open_with_description(ret
, NULL
);
1257 int bus_set_address_system(sd_bus
*b
) {
1261 e
= secure_getenv("DBUS_SYSTEM_BUS_ADDRESS");
1263 return sd_bus_set_address(b
, e
);
1265 return sd_bus_set_address(b
, DEFAULT_SYSTEM_BUS_ADDRESS
);
1268 _public_
int sd_bus_open_system_with_description(sd_bus
**ret
, const char *description
) {
1269 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1272 assert_return(ret
, -EINVAL
);
1279 r
= sd_bus_set_description(b
, description
);
1284 r
= bus_set_address_system(b
);
1288 b
->bus_client
= true;
1289 b
->is_system
= true;
1291 /* Let's do per-method access control on the system bus. We
1292 * need the caller's UID and capability set for that. */
1294 b
->creds_mask
|= SD_BUS_CREDS_UID
| SD_BUS_CREDS_EUID
| SD_BUS_CREDS_EFFECTIVE_CAPS
;
1297 r
= sd_bus_start(b
);
1305 _public_
int sd_bus_open_system(sd_bus
**ret
) {
1306 return sd_bus_open_system_with_description(ret
, NULL
);
1309 int bus_set_address_user(sd_bus
*b
) {
1311 _cleanup_free_
char *ee
= NULL
, *s
= NULL
;
1315 e
= secure_getenv("DBUS_SESSION_BUS_ADDRESS");
1317 return sd_bus_set_address(b
, e
);
1319 e
= secure_getenv("XDG_RUNTIME_DIR");
1323 ee
= bus_address_escape(e
);
1327 if (asprintf(&s
, DEFAULT_USER_BUS_ADDRESS_FMT
, ee
) < 0)
1330 b
->address
= TAKE_PTR(s
);
1335 _public_
int sd_bus_open_user_with_description(sd_bus
**ret
, const char *description
) {
1336 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1339 assert_return(ret
, -EINVAL
);
1346 r
= sd_bus_set_description(b
, description
);
1351 r
= bus_set_address_user(b
);
1355 b
->bus_client
= true;
1358 /* We don't do any per-method access control on the user bus. */
1362 r
= sd_bus_start(b
);
1370 _public_
int sd_bus_open_user(sd_bus
**ret
) {
1371 return sd_bus_open_user_with_description(ret
, NULL
);
1374 int bus_set_address_system_remote(sd_bus
*b
, const char *host
) {
1375 _cleanup_free_
char *e
= NULL
;
1376 char *m
= NULL
, *c
= NULL
, *a
, *rbracket
= NULL
, *p
= NULL
;
1381 /* Skip ":"s in ipv6 addresses */
1385 rbracket
= strchr(host
, ']');
1388 t
= strndupa(host
+ 1, rbracket
- host
- 1);
1389 e
= bus_address_escape(t
);
1392 } else if ((a
= strchr(host
, '@'))) {
1393 if (*(a
+ 1) == '[') {
1394 _cleanup_free_
char *t
= NULL
;
1396 rbracket
= strchr(a
+ 1, ']');
1399 t
= new0(char, strlen(host
));
1402 strncat(t
, host
, a
- host
+ 1);
1403 strncat(t
, a
+ 2, rbracket
- a
- 2);
1404 e
= bus_address_escape(t
);
1407 } else if (*(a
+ 1) == '\0' || strchr(a
+ 1, '@'))
1411 /* Let's see if a port was given */
1412 m
= strchr(rbracket
? rbracket
+ 1 : host
, ':');
1415 bool got_forward_slash
= false;
1421 p
= strndupa(p
, t
- p
);
1422 got_forward_slash
= true;
1425 if (!in_charset(p
, "0123456789") || *p
== '\0') {
1426 if (!machine_name_is_valid(p
) || got_forward_slash
)
1430 goto interpret_port_as_machine_old_syntax
;
1434 /* Let's see if a machine was given */
1435 m
= strchr(rbracket
? rbracket
+ 1 : host
, '/');
1438 interpret_port_as_machine_old_syntax
:
1439 /* Let's make sure this is not a port of some kind,
1440 * and is a valid machine name. */
1441 if (!in_charset(m
, "0123456789") && machine_name_is_valid(m
))
1442 c
= strjoina(",argv", p
? "7" : "5", "=--machine=", m
);
1448 t
= strndupa(host
, strcspn(host
, ":/"));
1450 e
= bus_address_escape(t
);
1455 a
= strjoin("unixexec:path=ssh,argv1=-xT", p
? ",argv2=-p,argv3=" : "", strempty(p
),
1456 ",argv", p
? "4" : "2", "=--,argv", p
? "5" : "3", "=", e
,
1457 ",argv", p
? "6" : "4", "=systemd-stdio-bridge", c
);
1461 return free_and_replace(b
->address
, a
);
1464 _public_
int sd_bus_open_system_remote(sd_bus
**ret
, const char *host
) {
1465 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1468 assert_return(host
, -EINVAL
);
1469 assert_return(ret
, -EINVAL
);
1475 r
= bus_set_address_system_remote(b
, host
);
1479 b
->bus_client
= true;
1481 b
->is_system
= true;
1482 b
->is_local
= false;
1484 r
= sd_bus_start(b
);
1492 int bus_set_address_system_machine(sd_bus
*b
, const char *machine
) {
1493 _cleanup_free_
char *e
= NULL
;
1499 e
= bus_address_escape(machine
);
1503 a
= strjoin("x-machine-unix:machine=", e
);
1507 return free_and_replace(b
->address
, a
);
1510 _public_
int sd_bus_open_system_machine(sd_bus
**ret
, const char *machine
) {
1511 _cleanup_(bus_freep
) sd_bus
*b
= NULL
;
1514 assert_return(machine
, -EINVAL
);
1515 assert_return(ret
, -EINVAL
);
1516 assert_return(streq(machine
, ".host") || machine_name_is_valid(machine
), -EINVAL
);
1522 r
= bus_set_address_system_machine(b
, machine
);
1526 b
->bus_client
= true;
1528 b
->is_system
= true;
1529 b
->is_local
= false;
1531 r
= sd_bus_start(b
);
1539 _public_
void sd_bus_close(sd_bus
*bus
) {
1542 if (bus
->state
== BUS_CLOSED
)
1544 if (bus_pid_changed(bus
))
1547 /* Don't leave ssh hanging around */
1550 bus_set_state(bus
, BUS_CLOSED
);
1552 sd_bus_detach_event(bus
);
1554 /* Drop all queued messages so that they drop references to
1555 * the bus object and the bus may be freed */
1556 bus_reset_queues(bus
);
1558 bus_close_io_fds(bus
);
1559 bus_close_inotify_fd(bus
);
1562 _public_ sd_bus
*sd_bus_close_unref(sd_bus
*bus
) {
1568 return sd_bus_unref(bus
);
1571 _public_ sd_bus
* sd_bus_flush_close_unref(sd_bus
*bus
) {
1575 /* Have to do this before flush() to prevent hang */
1579 return sd_bus_close_unref(bus
);
1582 void bus_enter_closing(sd_bus
*bus
) {
1585 if (!IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
, BUS_HELLO
, BUS_RUNNING
))
1588 bus_set_state(bus
, BUS_CLOSING
);
1591 DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(sd_bus
, sd_bus
, bus_free
);
1593 _public_
int sd_bus_is_open(sd_bus
*bus
) {
1594 assert_return(bus
, -EINVAL
);
1595 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1596 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1598 return BUS_IS_OPEN(bus
->state
);
1601 _public_
int sd_bus_is_ready(sd_bus
*bus
) {
1602 assert_return(bus
, -EINVAL
);
1603 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1604 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1606 return bus
->state
== BUS_RUNNING
;
1609 _public_
int sd_bus_can_send(sd_bus
*bus
, char type
) {
1612 assert_return(bus
, -EINVAL
);
1613 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1614 assert_return(bus
->state
!= BUS_UNSET
, -ENOTCONN
);
1615 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1617 if (bus
->is_monitor
)
1620 if (type
== SD_BUS_TYPE_UNIX_FD
) {
1621 if (!bus
->accept_fd
)
1624 r
= bus_ensure_running(bus
);
1628 return bus
->can_fds
;
1631 return bus_type_is_valid(type
);
1634 _public_
int sd_bus_get_bus_id(sd_bus
*bus
, sd_id128_t
*id
) {
1637 assert_return(bus
, -EINVAL
);
1638 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
1639 assert_return(id
, -EINVAL
);
1640 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1642 r
= bus_ensure_running(bus
);
1646 *id
= bus
->server_id
;
1650 #define COOKIE_CYCLED (UINT32_C(1) << 31)
1652 static uint64_t cookie_inc(uint64_t cookie
) {
1654 /* Stay within the 32bit range, since classic D-Bus can't deal with more */
1655 if (cookie
>= UINT32_MAX
)
1656 return COOKIE_CYCLED
; /* Don't go back to zero, but use the highest bit for checking
1657 * whether we are looping. */
1662 static int next_cookie(sd_bus
*b
) {
1663 uint64_t new_cookie
;
1667 new_cookie
= cookie_inc(b
->cookie
);
1669 /* Small optimization: don't bother with checking for cookie reuse until we overran cookiespace at
1670 * least once, but then do it thorougly. */
1671 if (FLAGS_SET(new_cookie
, COOKIE_CYCLED
)) {
1674 /* Check if the cookie is currently in use. If so, pick the next one */
1675 for (i
= 0; i
< COOKIE_CYCLED
; i
++) {
1676 if (!ordered_hashmap_contains(b
->reply_callbacks
, &new_cookie
))
1679 new_cookie
= cookie_inc(new_cookie
);
1682 /* Can't fulfill request */
1687 b
->cookie
= new_cookie
;
1691 static int bus_seal_message(sd_bus
*b
, sd_bus_message
*m
, usec_t timeout
) {
1698 /* If we copy the same message to multiple
1699 * destinations, avoid using the same cookie
1701 b
->cookie
= MAX(b
->cookie
, BUS_MESSAGE_COOKIE(m
));
1706 r
= sd_bus_get_method_call_timeout(b
, &timeout
);
1711 if (!m
->sender
&& b
->patch_sender
) {
1712 r
= sd_bus_message_set_sender(m
, b
->patch_sender
);
1721 return sd_bus_message_seal(m
, b
->cookie
, timeout
);
1724 static int bus_remarshal_message(sd_bus
*b
, sd_bus_message
**m
) {
1725 bool remarshal
= false;
1729 /* wrong packet version */
1730 if (b
->message_version
!= 0 && b
->message_version
!= (*m
)->header
->version
)
1733 /* wrong packet endianness */
1734 if (b
->message_endian
!= 0 && b
->message_endian
!= (*m
)->header
->endian
)
1737 return remarshal
? bus_message_remarshal(b
, m
) : 0;
1740 int bus_seal_synthetic_message(sd_bus
*b
, sd_bus_message
*m
) {
1744 /* Fake some timestamps, if they were requested, and not
1745 * already initialized */
1746 if (b
->attach_timestamp
) {
1747 if (m
->realtime
<= 0)
1748 m
->realtime
= now(CLOCK_REALTIME
);
1750 if (m
->monotonic
<= 0)
1751 m
->monotonic
= now(CLOCK_MONOTONIC
);
1754 /* The bus specification says the serial number cannot be 0,
1755 * hence let's fill something in for synthetic messages. Since
1756 * synthetic messages might have a fake sender and we don't
1757 * want to interfere with the real sender's serial numbers we
1758 * pick a fixed, artificial one. We use (uint32_t) -1 rather
1759 * than (uint64_t) -1 since dbus1 only had 32bit identifiers,
1760 * even though kdbus can do 64bit. */
1761 return sd_bus_message_seal(m
, 0xFFFFFFFFULL
, 0);
1764 static int bus_write_message(sd_bus
*bus
, sd_bus_message
*m
, size_t *idx
) {
1770 r
= bus_socket_write_message(bus
, m
, idx
);
1774 if (*idx
>= BUS_MESSAGE_SIZE(m
))
1775 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",
1776 bus_message_type_to_string(m
->header
->type
),
1777 strna(sd_bus_message_get_sender(m
)),
1778 strna(sd_bus_message_get_destination(m
)),
1779 strna(sd_bus_message_get_path(m
)),
1780 strna(sd_bus_message_get_interface(m
)),
1781 strna(sd_bus_message_get_member(m
)),
1782 BUS_MESSAGE_COOKIE(m
),
1784 strna(m
->root_container
.signature
),
1785 strna(m
->error
.name
),
1786 strna(m
->error
.message
));
1791 static int dispatch_wqueue(sd_bus
*bus
) {
1795 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1797 while (bus
->wqueue_size
> 0) {
1799 r
= bus_write_message(bus
, bus
->wqueue
[0], &bus
->windex
);
1803 /* Didn't do anything this time */
1805 else if (bus
->windex
>= BUS_MESSAGE_SIZE(bus
->wqueue
[0])) {
1806 /* Fully written. Let's drop the entry from
1809 * This isn't particularly optimized, but
1810 * well, this is supposed to be our worst-case
1811 * buffer only, and the socket buffer is
1812 * supposed to be our primary buffer, and if
1813 * it got full, then all bets are off
1817 bus_message_unref_queued(bus
->wqueue
[0], bus
);
1818 memmove(bus
->wqueue
, bus
->wqueue
+ 1, sizeof(sd_bus_message
*) * bus
->wqueue_size
);
1828 static int bus_read_message(sd_bus
*bus
, bool hint_priority
, int64_t priority
) {
1831 return bus_socket_read_message(bus
);
1834 int bus_rqueue_make_room(sd_bus
*bus
) {
1837 if (bus
->rqueue_size
>= BUS_RQUEUE_MAX
)
1840 if (!GREEDY_REALLOC(bus
->rqueue
, bus
->rqueue_allocated
, bus
->rqueue_size
+ 1))
1846 static void rqueue_drop_one(sd_bus
*bus
, size_t i
) {
1848 assert(i
< bus
->rqueue_size
);
1850 bus_message_unref_queued(bus
->rqueue
[i
], bus
);
1851 memmove(bus
->rqueue
+ i
, bus
->rqueue
+ i
+ 1, sizeof(sd_bus_message
*) * (bus
->rqueue_size
- i
- 1));
1855 static int dispatch_rqueue(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**m
) {
1860 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
1862 /* Note that the priority logic is only available on kdbus,
1863 * where the rqueue is unused. We check the rqueue here
1864 * anyway, because it's simple... */
1867 if (bus
->rqueue_size
> 0) {
1868 /* Dispatch a queued message */
1869 *m
= sd_bus_message_ref(bus
->rqueue
[0]);
1870 rqueue_drop_one(bus
, 0);
1874 /* Try to read a new message */
1875 r
= bus_read_message(bus
, hint_priority
, priority
);
1887 _public_
int sd_bus_send(sd_bus
*bus
, sd_bus_message
*_m
, uint64_t *cookie
) {
1888 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
1891 assert_return(m
, -EINVAL
);
1896 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1898 if (!BUS_IS_OPEN(bus
->state
))
1902 r
= sd_bus_can_send(bus
, SD_BUS_TYPE_UNIX_FD
);
1909 /* If the cookie number isn't kept, then we know that no reply
1911 if (!cookie
&& !m
->sealed
)
1912 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
1914 r
= bus_seal_message(bus
, m
, 0);
1918 /* Remarshall if we have to. This will possibly unref the
1919 * message and place a replacement in m */
1920 r
= bus_remarshal_message(bus
, &m
);
1924 /* If this is a reply and no reply was requested, then let's
1925 * suppress this, if we can */
1929 if (IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
) && bus
->wqueue_size
<= 0) {
1932 r
= bus_write_message(bus
, m
, &idx
);
1934 if (ERRNO_IS_DISCONNECT(r
)) {
1935 bus_enter_closing(bus
);
1942 if (idx
< BUS_MESSAGE_SIZE(m
)) {
1943 /* Wasn't fully written. So let's remember how
1944 * much was written. Note that the first entry
1945 * of the wqueue array is always allocated so
1946 * that we always can remember how much was
1948 bus
->wqueue
[0] = bus_message_ref_queued(m
, bus
);
1949 bus
->wqueue_size
= 1;
1954 /* Just append it to the queue. */
1956 if (bus
->wqueue_size
>= BUS_WQUEUE_MAX
)
1959 if (!GREEDY_REALLOC(bus
->wqueue
, bus
->wqueue_allocated
, bus
->wqueue_size
+ 1))
1962 bus
->wqueue
[bus
->wqueue_size
++] = bus_message_ref_queued(m
, bus
);
1967 *cookie
= BUS_MESSAGE_COOKIE(m
);
1972 _public_
int sd_bus_send_to(sd_bus
*bus
, sd_bus_message
*m
, const char *destination
, uint64_t *cookie
) {
1975 assert_return(m
, -EINVAL
);
1980 assert_return(!bus_pid_changed(bus
), -ECHILD
);
1982 if (!BUS_IS_OPEN(bus
->state
))
1985 if (!streq_ptr(m
->destination
, destination
)) {
1990 r
= sd_bus_message_set_destination(m
, destination
);
1995 return sd_bus_send(bus
, m
, cookie
);
1998 static usec_t
calc_elapse(sd_bus
*bus
, uint64_t usec
) {
2001 if (usec
== (uint64_t) -1)
2004 /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel
2005 * with any connection setup states. Hence, if a method callback is started earlier than that we just store the
2006 * relative timestamp, and afterwards the absolute one. */
2008 if (IN_SET(bus
->state
, BUS_WATCH_BIND
, BUS_OPENING
, BUS_AUTHENTICATING
))
2011 return now(CLOCK_MONOTONIC
) + usec
;
2014 static int timeout_compare(const void *a
, const void *b
) {
2015 const struct reply_callback
*x
= a
, *y
= b
;
2017 if (x
->timeout_usec
!= 0 && y
->timeout_usec
== 0)
2020 if (x
->timeout_usec
== 0 && y
->timeout_usec
!= 0)
2023 return CMP(x
->timeout_usec
, y
->timeout_usec
);
2026 _public_
int sd_bus_call_async(
2030 sd_bus_message_handler_t callback
,
2034 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2035 _cleanup_(sd_bus_slot_unrefp
) sd_bus_slot
*s
= NULL
;
2038 assert_return(m
, -EINVAL
);
2039 assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
);
2040 assert_return(!m
->sealed
|| (!!callback
== !(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)), -EINVAL
);
2045 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2047 if (!BUS_IS_OPEN(bus
->state
))
2050 /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */
2051 if (!callback
&& !slot
&& !m
->sealed
)
2052 m
->header
->flags
|= BUS_MESSAGE_NO_REPLY_EXPECTED
;
2054 r
= ordered_hashmap_ensure_allocated(&bus
->reply_callbacks
, &uint64_hash_ops
);
2058 r
= prioq_ensure_allocated(&bus
->reply_callbacks_prioq
, timeout_compare
);
2062 r
= bus_seal_message(bus
, m
, usec
);
2066 r
= bus_remarshal_message(bus
, &m
);
2070 if (slot
|| callback
) {
2071 s
= bus_slot_allocate(bus
, !slot
, BUS_REPLY_CALLBACK
, sizeof(struct reply_callback
), userdata
);
2075 s
->reply_callback
.callback
= callback
;
2077 s
->reply_callback
.cookie
= BUS_MESSAGE_COOKIE(m
);
2078 r
= ordered_hashmap_put(bus
->reply_callbacks
, &s
->reply_callback
.cookie
, &s
->reply_callback
);
2080 s
->reply_callback
.cookie
= 0;
2084 s
->reply_callback
.timeout_usec
= calc_elapse(bus
, m
->timeout
);
2085 if (s
->reply_callback
.timeout_usec
!= 0) {
2086 r
= prioq_put(bus
->reply_callbacks_prioq
, &s
->reply_callback
, &s
->reply_callback
.prioq_idx
);
2088 s
->reply_callback
.timeout_usec
= 0;
2094 r
= sd_bus_send(bus
, m
, s
? &s
->reply_callback
.cookie
: NULL
);
2105 int bus_ensure_running(sd_bus
*bus
) {
2110 if (IN_SET(bus
->state
, BUS_UNSET
, BUS_CLOSED
, BUS_CLOSING
))
2112 if (bus
->state
== BUS_RUNNING
)
2116 r
= sd_bus_process(bus
, NULL
);
2119 if (bus
->state
== BUS_RUNNING
)
2124 r
= sd_bus_wait(bus
, (uint64_t) -1);
2130 _public_
int sd_bus_call(
2134 sd_bus_error
*error
,
2135 sd_bus_message
**reply
) {
2137 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= sd_bus_message_ref(_m
);
2143 bus_assert_return(m
, -EINVAL
, error
);
2144 bus_assert_return(m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
, -EINVAL
, error
);
2145 bus_assert_return(!(m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
), -EINVAL
, error
);
2146 bus_assert_return(!bus_error_is_dirty(error
), -EINVAL
, error
);
2151 bus_assert_return(!bus_pid_changed(bus
), -ECHILD
, error
);
2153 if (!BUS_IS_OPEN(bus
->state
)) {
2158 r
= bus_ensure_running(bus
);
2162 i
= bus
->rqueue_size
;
2164 r
= bus_seal_message(bus
, m
, usec
);
2168 r
= bus_remarshal_message(bus
, &m
);
2172 r
= sd_bus_send(bus
, m
, &cookie
);
2176 timeout
= calc_elapse(bus
, m
->timeout
);
2181 while (i
< bus
->rqueue_size
) {
2182 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*incoming
= NULL
;
2184 incoming
= sd_bus_message_ref(bus
->rqueue
[i
]);
2186 if (incoming
->reply_cookie
== cookie
) {
2187 /* Found a match! */
2189 rqueue_drop_one(bus
, i
);
2190 log_debug_bus_message(incoming
);
2192 if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_RETURN
) {
2194 if (incoming
->n_fds
<= 0 || bus
->accept_fd
) {
2196 *reply
= TAKE_PTR(incoming
);
2201 return sd_bus_error_setf(error
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptors which I couldn't accept. Sorry.");
2203 } else if (incoming
->header
->type
== SD_BUS_MESSAGE_METHOD_ERROR
)
2204 return sd_bus_error_copy(error
, &incoming
->error
);
2210 } else if (BUS_MESSAGE_COOKIE(incoming
) == cookie
&&
2213 streq(bus
->unique_name
, incoming
->sender
)) {
2215 rqueue_drop_one(bus
, i
);
2217 /* Our own message? Somebody is trying to send its own client a message,
2218 * let's not dead-lock, let's fail immediately. */
2224 /* Try to read more, right-away */
2228 r
= bus_read_message(bus
, false, 0);
2230 if (ERRNO_IS_DISCONNECT(r
)) {
2231 bus_enter_closing(bus
);
2243 n
= now(CLOCK_MONOTONIC
);
2251 left
= (uint64_t) -1;
2253 r
= bus_poll(bus
, true, left
);
2261 r
= dispatch_wqueue(bus
);
2263 if (ERRNO_IS_DISCONNECT(r
)) {
2264 bus_enter_closing(bus
);
2273 return sd_bus_error_set_errno(error
, r
);
2276 _public_
int sd_bus_get_fd(sd_bus
*bus
) {
2278 assert_return(bus
, -EINVAL
);
2279 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2280 assert_return(bus
->input_fd
== bus
->output_fd
, -EPERM
);
2281 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2283 if (bus
->state
== BUS_CLOSED
)
2286 if (bus
->inotify_fd
>= 0)
2287 return bus
->inotify_fd
;
2289 if (bus
->input_fd
>= 0)
2290 return bus
->input_fd
;
2295 _public_
int sd_bus_get_events(sd_bus
*bus
) {
2298 assert_return(bus
, -EINVAL
);
2299 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2300 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2302 switch (bus
->state
) {
2308 case BUS_WATCH_BIND
:
2316 case BUS_AUTHENTICATING
:
2317 if (bus_socket_auth_needs_write(bus
))
2325 if (bus
->rqueue_size
<= 0)
2327 if (bus
->wqueue_size
> 0)
2335 assert_not_reached("Unknown state");
2341 _public_
int sd_bus_get_timeout(sd_bus
*bus
, uint64_t *timeout_usec
) {
2342 struct reply_callback
*c
;
2344 assert_return(bus
, -EINVAL
);
2345 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2346 assert_return(timeout_usec
, -EINVAL
);
2347 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2349 if (!BUS_IS_OPEN(bus
->state
) && bus
->state
!= BUS_CLOSING
)
2352 if (bus
->track_queue
) {
2357 switch (bus
->state
) {
2359 case BUS_AUTHENTICATING
:
2360 *timeout_usec
= bus
->auth_timeout
;
2365 if (bus
->rqueue_size
> 0) {
2370 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2372 *timeout_usec
= (uint64_t) -1;
2376 if (c
->timeout_usec
== 0) {
2377 *timeout_usec
= (uint64_t) -1;
2381 *timeout_usec
= c
->timeout_usec
;
2388 case BUS_WATCH_BIND
:
2390 *timeout_usec
= (uint64_t) -1;
2394 assert_not_reached("Unknown or unexpected stat");
2398 static int process_timeout(sd_bus
*bus
) {
2399 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2400 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
* m
= NULL
;
2401 struct reply_callback
*c
;
2408 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2410 c
= prioq_peek(bus
->reply_callbacks_prioq
);
2414 n
= now(CLOCK_MONOTONIC
);
2415 if (c
->timeout_usec
> n
)
2418 r
= bus_message_new_synthetic_error(
2421 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Method call timed out"),
2426 m
->read_counter
= ++bus
->read_counter
;
2428 r
= bus_seal_synthetic_message(bus
, m
);
2432 assert_se(prioq_pop(bus
->reply_callbacks_prioq
) == c
);
2433 c
->timeout_usec
= 0;
2435 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2438 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2440 bus
->iteration_counter
++;
2442 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2444 bus
->current_message
= m
;
2445 bus
->current_slot
= sd_bus_slot_ref(slot
);
2446 bus
->current_handler
= c
->callback
;
2447 bus
->current_userdata
= slot
->userdata
;
2448 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2449 bus
->current_userdata
= NULL
;
2450 bus
->current_handler
= NULL
;
2451 bus
->current_slot
= NULL
;
2452 bus
->current_message
= NULL
;
2455 bus_slot_disconnect(slot
, true);
2457 sd_bus_slot_unref(slot
);
2459 /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log
2460 * and ignore the callback handler's return value. */
2464 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2467 static int process_hello(sd_bus
*bus
, sd_bus_message
*m
) {
2471 if (bus
->state
!= BUS_HELLO
)
2474 /* Let's make sure the first message on the bus is the HELLO
2475 * reply. But note that we don't actually parse the message
2476 * here (we leave that to the usual handling), we just verify
2477 * we don't let any earlier msg through. */
2479 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2482 if (m
->reply_cookie
!= 1)
2488 static int process_reply(sd_bus
*bus
, sd_bus_message
*m
) {
2489 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*synthetic_reply
= NULL
;
2490 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2491 struct reply_callback
*c
;
2499 if (!IN_SET(m
->header
->type
, SD_BUS_MESSAGE_METHOD_RETURN
, SD_BUS_MESSAGE_METHOD_ERROR
))
2502 if (m
->destination
&& bus
->unique_name
&& !streq_ptr(m
->destination
, bus
->unique_name
))
2505 c
= ordered_hashmap_remove(bus
->reply_callbacks
, &m
->reply_cookie
);
2511 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2513 if (m
->n_fds
> 0 && !bus
->accept_fd
) {
2515 /* If the reply contained a file descriptor which we
2516 * didn't want we pass an error instead. */
2518 r
= bus_message_new_synthetic_error(
2521 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Reply message contained file descriptor"),
2526 /* Copy over original timestamp */
2527 synthetic_reply
->realtime
= m
->realtime
;
2528 synthetic_reply
->monotonic
= m
->monotonic
;
2529 synthetic_reply
->seqnum
= m
->seqnum
;
2530 synthetic_reply
->read_counter
= m
->read_counter
;
2532 r
= bus_seal_synthetic_message(bus
, synthetic_reply
);
2536 m
= synthetic_reply
;
2538 r
= sd_bus_message_rewind(m
, true);
2543 if (c
->timeout_usec
!= 0) {
2544 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2545 c
->timeout_usec
= 0;
2548 is_hello
= bus
->state
== BUS_HELLO
&& c
->callback
== hello_callback
;
2550 bus
->current_slot
= sd_bus_slot_ref(slot
);
2551 bus
->current_handler
= c
->callback
;
2552 bus
->current_userdata
= slot
->userdata
;
2553 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2554 bus
->current_userdata
= NULL
;
2555 bus
->current_handler
= NULL
;
2556 bus
->current_slot
= NULL
;
2559 bus_slot_disconnect(slot
, true);
2561 sd_bus_slot_unref(slot
);
2563 /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and
2564 * ignore the callback handler's return value. */
2568 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2571 static int process_filter(sd_bus
*bus
, sd_bus_message
*m
) {
2572 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2573 struct filter_callback
*l
;
2580 bus
->filter_callbacks_modified
= false;
2582 LIST_FOREACH(callbacks
, l
, bus
->filter_callbacks
) {
2585 if (bus
->filter_callbacks_modified
)
2588 /* Don't run this more than once per iteration */
2589 if (l
->last_iteration
== bus
->iteration_counter
)
2592 l
->last_iteration
= bus
->iteration_counter
;
2594 r
= sd_bus_message_rewind(m
, true);
2598 slot
= container_of(l
, sd_bus_slot
, filter_callback
);
2600 bus
->current_slot
= sd_bus_slot_ref(slot
);
2601 bus
->current_handler
= l
->callback
;
2602 bus
->current_userdata
= slot
->userdata
;
2603 r
= l
->callback(m
, slot
->userdata
, &error_buffer
);
2604 bus
->current_userdata
= NULL
;
2605 bus
->current_handler
= NULL
;
2606 bus
->current_slot
= sd_bus_slot_unref(slot
);
2608 r
= bus_maybe_reply_error(m
, r
, &error_buffer
);
2614 } while (bus
->filter_callbacks_modified
);
2619 static int process_match(sd_bus
*bus
, sd_bus_message
*m
) {
2626 bus
->match_callbacks_modified
= false;
2628 r
= bus_match_run(bus
, &bus
->match_callbacks
, m
);
2632 } while (bus
->match_callbacks_modified
);
2637 static int process_builtin(sd_bus
*bus
, sd_bus_message
*m
) {
2638 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*reply
= NULL
;
2644 if (bus
->is_monitor
)
2647 if (bus
->manual_peer_interface
)
2650 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2653 if (!streq_ptr(m
->interface
, "org.freedesktop.DBus.Peer"))
2656 if (m
->header
->flags
& BUS_MESSAGE_NO_REPLY_EXPECTED
)
2659 if (streq_ptr(m
->member
, "Ping"))
2660 r
= sd_bus_message_new_method_return(m
, &reply
);
2661 else if (streq_ptr(m
->member
, "GetMachineId")) {
2665 r
= sd_id128_get_machine(&id
);
2669 r
= sd_bus_message_new_method_return(m
, &reply
);
2673 r
= sd_bus_message_append(reply
, "s", sd_id128_to_string(id
, sid
));
2675 r
= sd_bus_message_new_method_errorf(
2677 SD_BUS_ERROR_UNKNOWN_METHOD
,
2678 "Unknown method '%s' on interface '%s'.", m
->member
, m
->interface
);
2683 r
= sd_bus_send(bus
, reply
, NULL
);
2690 static int process_fd_check(sd_bus
*bus
, sd_bus_message
*m
) {
2694 /* If we got a message with a file descriptor which we didn't
2695 * want to accept, then let's drop it. How can this even
2696 * happen? For example, when the kernel queues a message into
2697 * an activatable names's queue which allows fds, and then is
2698 * delivered to us later even though we ourselves did not
2701 if (bus
->is_monitor
)
2710 if (m
->header
->type
!= SD_BUS_MESSAGE_METHOD_CALL
)
2711 return 1; /* just eat it up */
2713 return sd_bus_reply_method_errorf(m
, SD_BUS_ERROR_INCONSISTENT_MESSAGE
, "Message contains file descriptors, which I cannot accept. Sorry.");
2716 static int process_message(sd_bus
*bus
, sd_bus_message
*m
) {
2722 bus
->current_message
= m
;
2723 bus
->iteration_counter
++;
2725 log_debug_bus_message(m
);
2727 r
= process_hello(bus
, m
);
2731 r
= process_reply(bus
, m
);
2735 r
= process_fd_check(bus
, m
);
2739 r
= process_filter(bus
, m
);
2743 r
= process_match(bus
, m
);
2747 r
= process_builtin(bus
, m
);
2751 r
= bus_process_object(bus
, m
);
2754 bus
->current_message
= NULL
;
2758 static int dispatch_track(sd_bus
*bus
) {
2761 if (!bus
->track_queue
)
2764 bus_track_dispatch(bus
->track_queue
);
2768 static int process_running(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2769 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2773 assert(IN_SET(bus
->state
, BUS_RUNNING
, BUS_HELLO
));
2775 r
= process_timeout(bus
);
2779 r
= dispatch_wqueue(bus
);
2783 r
= dispatch_track(bus
);
2787 r
= dispatch_rqueue(bus
, hint_priority
, priority
, &m
);
2793 r
= process_message(bus
, m
);
2798 r
= sd_bus_message_rewind(m
, true);
2806 if (m
->header
->type
== SD_BUS_MESSAGE_METHOD_CALL
) {
2808 log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s",
2809 strna(sd_bus_message_get_sender(m
)),
2810 strna(sd_bus_message_get_path(m
)),
2811 strna(sd_bus_message_get_interface(m
)),
2812 strna(sd_bus_message_get_member(m
)));
2814 r
= sd_bus_reply_method_errorf(
2816 SD_BUS_ERROR_UNKNOWN_OBJECT
,
2817 "Unknown object '%s'.", m
->path
);
2831 static int bus_exit_now(sd_bus
*bus
) {
2834 /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
2835 * sd_event_exit(), otherwise invokes libc exit(). */
2837 if (bus
->exited
) /* did we already exit? */
2839 if (!bus
->exit_triggered
) /* was the exit condition triggered? */
2841 if (!bus
->exit_on_disconnect
) /* Shall we actually exit on disconnection? */
2844 bus
->exited
= true; /* never exit more than once */
2846 log_debug("Bus connection disconnected, exiting.");
2849 return sd_event_exit(bus
->event
, EXIT_FAILURE
);
2853 assert_not_reached("exit() didn't exit?");
2856 static int process_closing_reply_callback(sd_bus
*bus
, struct reply_callback
*c
) {
2857 _cleanup_(sd_bus_error_free
) sd_bus_error error_buffer
= SD_BUS_ERROR_NULL
;
2858 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2865 r
= bus_message_new_synthetic_error(
2868 &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY
, "Connection terminated"),
2873 m
->read_counter
= ++bus
->read_counter
;
2875 r
= bus_seal_synthetic_message(bus
, m
);
2879 if (c
->timeout_usec
!= 0) {
2880 prioq_remove(bus
->reply_callbacks_prioq
, c
, &c
->prioq_idx
);
2881 c
->timeout_usec
= 0;
2884 ordered_hashmap_remove(bus
->reply_callbacks
, &c
->cookie
);
2887 slot
= container_of(c
, sd_bus_slot
, reply_callback
);
2889 bus
->iteration_counter
++;
2891 bus
->current_message
= m
;
2892 bus
->current_slot
= sd_bus_slot_ref(slot
);
2893 bus
->current_handler
= c
->callback
;
2894 bus
->current_userdata
= slot
->userdata
;
2895 r
= c
->callback(m
, slot
->userdata
, &error_buffer
);
2896 bus
->current_userdata
= NULL
;
2897 bus
->current_handler
= NULL
;
2898 bus
->current_slot
= NULL
;
2899 bus
->current_message
= NULL
;
2902 bus_slot_disconnect(slot
, true);
2904 sd_bus_slot_unref(slot
);
2906 return bus_maybe_reply_error(m
, r
, &error_buffer
);
2909 static int process_closing(sd_bus
*bus
, sd_bus_message
**ret
) {
2910 _cleanup_(sd_bus_message_unrefp
) sd_bus_message
*m
= NULL
;
2911 struct reply_callback
*c
;
2915 assert(bus
->state
== BUS_CLOSING
);
2917 /* First, fail all outstanding method calls */
2918 c
= ordered_hashmap_first(bus
->reply_callbacks
);
2920 return process_closing_reply_callback(bus
, c
);
2922 /* Then, fake-drop all remaining bus tracking references */
2924 bus_track_close(bus
->tracks
);
2928 /* Then, synthesize a Disconnected message */
2929 r
= sd_bus_message_new_signal(
2932 "/org/freedesktop/DBus/Local",
2933 "org.freedesktop.DBus.Local",
2938 bus_message_set_sender_local(bus
, m
);
2939 m
->read_counter
= ++bus
->read_counter
;
2941 r
= bus_seal_synthetic_message(bus
, m
);
2947 bus
->current_message
= m
;
2948 bus
->iteration_counter
++;
2950 r
= process_filter(bus
, m
);
2954 r
= process_match(bus
, m
);
2958 /* Nothing else to do, exit now, if the condition holds */
2959 bus
->exit_triggered
= true;
2960 (void) bus_exit_now(bus
);
2968 bus
->current_message
= NULL
;
2973 static int bus_process_internal(sd_bus
*bus
, bool hint_priority
, int64_t priority
, sd_bus_message
**ret
) {
2976 /* Returns 0 when we didn't do anything. This should cause the
2977 * caller to invoke sd_bus_wait() before returning the next
2978 * time. Returns > 0 when we did something, which possibly
2979 * means *ret is filled in with an unprocessed message. */
2981 assert_return(bus
, -EINVAL
);
2982 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
2983 assert_return(!bus_pid_changed(bus
), -ECHILD
);
2985 /* We don't allow recursively invoking sd_bus_process(). */
2986 assert_return(!bus
->current_message
, -EBUSY
);
2987 assert(!bus
->current_slot
); /* This should be NULL whenever bus->current_message is */
2989 BUS_DONT_DESTROY(bus
);
2991 switch (bus
->state
) {
2999 case BUS_WATCH_BIND
:
3000 r
= bus_socket_process_watch_bind(bus
);
3004 r
= bus_socket_process_opening(bus
);
3007 case BUS_AUTHENTICATING
:
3008 r
= bus_socket_process_authenticating(bus
);
3013 r
= process_running(bus
, hint_priority
, priority
, ret
);
3017 /* This branch initializes *ret, hence we don't use the generic error checking below */
3021 return process_closing(bus
, ret
);
3024 assert_not_reached("Unknown state");
3027 if (ERRNO_IS_DISCONNECT(r
)) {
3028 bus_enter_closing(bus
);
3039 _public_
int sd_bus_process(sd_bus
*bus
, sd_bus_message
**ret
) {
3040 return bus_process_internal(bus
, false, 0, ret
);
3043 _public_
int sd_bus_process_priority(sd_bus
*bus
, int64_t priority
, sd_bus_message
**ret
) {
3044 return bus_process_internal(bus
, true, priority
, ret
);
3047 static int bus_poll(sd_bus
*bus
, bool need_more
, uint64_t timeout_usec
) {
3048 struct pollfd p
[2] = {};
3051 usec_t m
= USEC_INFINITY
;
3055 if (bus
->state
== BUS_CLOSING
)
3058 if (!BUS_IS_OPEN(bus
->state
))
3061 if (bus
->state
== BUS_WATCH_BIND
) {
3062 assert(bus
->inotify_fd
>= 0);
3064 p
[0].events
= POLLIN
;
3065 p
[0].fd
= bus
->inotify_fd
;
3070 e
= sd_bus_get_events(bus
);
3075 /* The caller really needs some more data, he doesn't
3076 * care about what's already read, or any timeouts
3077 * except its own. */
3081 /* The caller wants to process if there's something to
3082 * process, but doesn't care otherwise */
3084 r
= sd_bus_get_timeout(bus
, &until
);
3088 m
= usec_sub_unsigned(until
, now(CLOCK_MONOTONIC
));
3091 p
[0].fd
= bus
->input_fd
;
3092 if (bus
->output_fd
== bus
->input_fd
) {
3096 p
[0].events
= e
& POLLIN
;
3097 p
[1].fd
= bus
->output_fd
;
3098 p
[1].events
= e
& POLLOUT
;
3103 if (timeout_usec
!= (uint64_t) -1 && (m
== USEC_INFINITY
|| timeout_usec
< m
))
3106 r
= ppoll(p
, n
, m
== USEC_INFINITY
? NULL
: timespec_store(&ts
, m
), NULL
);
3110 return r
> 0 ? 1 : 0;
3113 _public_
int sd_bus_wait(sd_bus
*bus
, uint64_t timeout_usec
) {
3115 assert_return(bus
, -EINVAL
);
3116 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3117 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3119 if (bus
->state
== BUS_CLOSING
)
3122 if (!BUS_IS_OPEN(bus
->state
))
3125 if (bus
->rqueue_size
> 0)
3128 return bus_poll(bus
, false, timeout_usec
);
3131 _public_
int sd_bus_flush(sd_bus
*bus
) {
3134 assert_return(bus
, -EINVAL
);
3135 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3136 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3138 if (bus
->state
== BUS_CLOSING
)
3141 if (!BUS_IS_OPEN(bus
->state
))
3144 /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */
3145 if (bus
->state
== BUS_WATCH_BIND
)
3148 r
= bus_ensure_running(bus
);
3152 if (bus
->wqueue_size
<= 0)
3156 r
= dispatch_wqueue(bus
);
3158 if (ERRNO_IS_DISCONNECT(r
)) {
3159 bus_enter_closing(bus
);
3166 if (bus
->wqueue_size
<= 0)
3169 r
= bus_poll(bus
, false, (uint64_t) -1);
3175 _public_
int sd_bus_add_filter(
3178 sd_bus_message_handler_t callback
,
3183 assert_return(bus
, -EINVAL
);
3184 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3185 assert_return(callback
, -EINVAL
);
3186 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3188 s
= bus_slot_allocate(bus
, !slot
, BUS_FILTER_CALLBACK
, sizeof(struct filter_callback
), userdata
);
3192 s
->filter_callback
.callback
= callback
;
3194 bus
->filter_callbacks_modified
= true;
3195 LIST_PREPEND(callbacks
, bus
->filter_callbacks
, &s
->filter_callback
);
3203 static int add_match_callback(
3206 sd_bus_error
*ret_error
) {
3208 sd_bus_slot
*match_slot
= userdata
;
3209 bool failed
= false;
3215 sd_bus_slot_ref(match_slot
);
3217 if (sd_bus_message_is_method_error(m
, NULL
)) {
3218 log_debug_errno(sd_bus_message_get_errno(m
),
3219 "Unable to add match %s, failing connection: %s",
3220 match_slot
->match_callback
.match_string
,
3221 sd_bus_message_get_error(m
)->message
);
3225 log_debug("Match %s successfully installed.", match_slot
->match_callback
.match_string
);
3227 if (match_slot
->match_callback
.install_callback
) {
3230 bus
= sd_bus_message_get_bus(m
);
3232 /* This function has been called as slot handler, and we want to call another slot handler. Let's
3233 * update the slot callback metadata temporarily with our own data, and then revert back to the old
3236 assert(bus
->current_slot
== match_slot
->match_callback
.install_slot
);
3237 assert(bus
->current_handler
== add_match_callback
);
3238 assert(bus
->current_userdata
== userdata
);
3240 bus
->current_slot
= match_slot
;
3241 bus
->current_handler
= match_slot
->match_callback
.install_callback
;
3242 bus
->current_userdata
= match_slot
->userdata
;
3244 r
= match_slot
->match_callback
.install_callback(m
, match_slot
->userdata
, ret_error
);
3246 bus
->current_slot
= match_slot
->match_callback
.install_slot
;
3247 bus
->current_handler
= add_match_callback
;
3248 bus
->current_userdata
= userdata
;
3250 if (failed
) /* Generic failure handling: destroy the connection */
3251 bus_enter_closing(sd_bus_message_get_bus(m
));
3256 /* We don't need the install method reply slot anymore, let's free it */
3257 match_slot
->match_callback
.install_slot
= sd_bus_slot_unref(match_slot
->match_callback
.install_slot
);
3259 if (failed
&& match_slot
->floating
)
3260 bus_slot_disconnect(match_slot
, true);
3262 sd_bus_slot_unref(match_slot
);
3267 static int bus_add_match_full(
3272 sd_bus_message_handler_t callback
,
3273 sd_bus_message_handler_t install_callback
,
3276 struct bus_match_component
*components
= NULL
;
3277 unsigned n_components
= 0;
3278 sd_bus_slot
*s
= NULL
;
3281 assert_return(bus
, -EINVAL
);
3282 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3283 assert_return(match
, -EINVAL
);
3284 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3286 r
= bus_match_parse(match
, &components
, &n_components
);
3290 s
= bus_slot_allocate(bus
, !slot
, BUS_MATCH_CALLBACK
, sizeof(struct match_callback
), userdata
);
3296 s
->match_callback
.callback
= callback
;
3297 s
->match_callback
.install_callback
= install_callback
;
3299 if (bus
->bus_client
) {
3300 enum bus_match_scope scope
;
3302 scope
= bus_match_get_scope(components
, n_components
);
3304 /* Do not install server-side matches for matches against the local service, interface or bus path. */
3305 if (scope
!= BUS_MATCH_LOCAL
) {
3307 /* We store the original match string, so that we can use it to remove the match again. */
3309 s
->match_callback
.match_string
= strdup(match
);
3310 if (!s
->match_callback
.match_string
) {
3316 r
= bus_add_match_internal_async(bus
,
3317 &s
->match_callback
.install_slot
,
3318 s
->match_callback
.match_string
,
3325 /* Make the slot of the match call floating now. We need the reference, but we don't
3326 * want that this match pins the bus object, hence we first create it non-floating, but
3327 * then make it floating. */
3328 r
= sd_bus_slot_set_floating(s
->match_callback
.install_slot
, true);
3330 r
= bus_add_match_internal(bus
, s
->match_callback
.match_string
, &s
->match_callback
.after
);
3334 s
->match_added
= true;
3338 bus
->match_callbacks_modified
= true;
3339 r
= bus_match_add(&bus
->match_callbacks
, components
, n_components
, &s
->match_callback
);
3348 bus_match_parse_free(components
, n_components
);
3349 sd_bus_slot_unref(s
);
3354 _public_
int sd_bus_add_match(
3358 sd_bus_message_handler_t callback
,
3361 return bus_add_match_full(bus
, slot
, false, match
, callback
, NULL
, userdata
);
3364 _public_
int sd_bus_add_match_async(
3368 sd_bus_message_handler_t callback
,
3369 sd_bus_message_handler_t install_callback
,
3372 return bus_add_match_full(bus
, slot
, true, match
, callback
, install_callback
, userdata
);
3375 bool bus_pid_changed(sd_bus
*bus
) {
3378 /* We don't support people creating a bus connection and
3379 * keeping it around over a fork(). Let's complain. */
3381 return bus
->original_pid
!= getpid_cached();
3384 static int io_callback(sd_event_source
*s
, int fd
, uint32_t revents
, void *userdata
) {
3385 sd_bus
*bus
= userdata
;
3390 /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */
3392 r
= sd_bus_process(bus
, NULL
);
3394 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3395 bus_enter_closing(bus
);
3401 static int time_callback(sd_event_source
*s
, uint64_t usec
, void *userdata
) {
3402 sd_bus
*bus
= userdata
;
3407 r
= sd_bus_process(bus
, NULL
);
3409 log_debug_errno(r
, "Processing of bus failed, closing down: %m");
3410 bus_enter_closing(bus
);
3416 static int prepare_callback(sd_event_source
*s
, void *userdata
) {
3417 sd_bus
*bus
= userdata
;
3424 e
= sd_bus_get_events(bus
);
3430 if (bus
->output_fd
!= bus
->input_fd
) {
3432 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
& POLLIN
);
3436 r
= sd_event_source_set_io_events(bus
->output_io_event_source
, e
& POLLOUT
);
3438 r
= sd_event_source_set_io_events(bus
->input_io_event_source
, e
);
3442 r
= sd_bus_get_timeout(bus
, &until
);
3448 j
= sd_event_source_set_time(bus
->time_event_source
, until
);
3455 r
= sd_event_source_set_enabled(bus
->time_event_source
, r
> 0);
3462 log_debug_errno(r
, "Preparing of bus events failed, closing down: %m");
3463 bus_enter_closing(bus
);
3468 static int quit_callback(sd_event_source
*event
, void *userdata
) {
3469 sd_bus
*bus
= userdata
;
3473 if (bus
->close_on_exit
) {
3481 int bus_attach_io_events(sd_bus
*bus
) {
3486 if (bus
->input_fd
< 0)
3492 if (!bus
->input_io_event_source
) {
3493 r
= sd_event_add_io(bus
->event
, &bus
->input_io_event_source
, bus
->input_fd
, 0, io_callback
, bus
);
3497 r
= sd_event_source_set_prepare(bus
->input_io_event_source
, prepare_callback
);
3501 r
= sd_event_source_set_priority(bus
->input_io_event_source
, bus
->event_priority
);
3505 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-input");
3507 r
= sd_event_source_set_io_fd(bus
->input_io_event_source
, bus
->input_fd
);
3512 if (bus
->output_fd
!= bus
->input_fd
) {
3513 assert(bus
->output_fd
>= 0);
3515 if (!bus
->output_io_event_source
) {
3516 r
= sd_event_add_io(bus
->event
, &bus
->output_io_event_source
, bus
->output_fd
, 0, io_callback
, bus
);
3520 r
= sd_event_source_set_priority(bus
->output_io_event_source
, bus
->event_priority
);
3524 r
= sd_event_source_set_description(bus
->input_io_event_source
, "bus-output");
3526 r
= sd_event_source_set_io_fd(bus
->output_io_event_source
, bus
->output_fd
);
3535 static void bus_detach_io_events(sd_bus
*bus
) {
3538 if (bus
->input_io_event_source
) {
3539 sd_event_source_set_enabled(bus
->input_io_event_source
, SD_EVENT_OFF
);
3540 bus
->input_io_event_source
= sd_event_source_unref(bus
->input_io_event_source
);
3543 if (bus
->output_io_event_source
) {
3544 sd_event_source_set_enabled(bus
->output_io_event_source
, SD_EVENT_OFF
);
3545 bus
->output_io_event_source
= sd_event_source_unref(bus
->output_io_event_source
);
3549 int bus_attach_inotify_event(sd_bus
*bus
) {
3554 if (bus
->inotify_fd
< 0)
3560 if (!bus
->inotify_event_source
) {
3561 r
= sd_event_add_io(bus
->event
, &bus
->inotify_event_source
, bus
->inotify_fd
, EPOLLIN
, io_callback
, bus
);
3565 r
= sd_event_source_set_priority(bus
->inotify_event_source
, bus
->event_priority
);
3569 r
= sd_event_source_set_description(bus
->inotify_event_source
, "bus-inotify");
3571 r
= sd_event_source_set_io_fd(bus
->inotify_event_source
, bus
->inotify_fd
);
3578 static void bus_detach_inotify_event(sd_bus
*bus
) {
3581 if (bus
->inotify_event_source
) {
3582 sd_event_source_set_enabled(bus
->inotify_event_source
, SD_EVENT_OFF
);
3583 bus
->inotify_event_source
= sd_event_source_unref(bus
->inotify_event_source
);
3587 _public_
int sd_bus_attach_event(sd_bus
*bus
, sd_event
*event
, int priority
) {
3590 assert_return(bus
, -EINVAL
);
3591 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3592 assert_return(!bus
->event
, -EBUSY
);
3594 assert(!bus
->input_io_event_source
);
3595 assert(!bus
->output_io_event_source
);
3596 assert(!bus
->time_event_source
);
3599 bus
->event
= sd_event_ref(event
);
3601 r
= sd_event_default(&bus
->event
);
3606 bus
->event_priority
= priority
;
3608 r
= sd_event_add_time(bus
->event
, &bus
->time_event_source
, CLOCK_MONOTONIC
, 0, 0, time_callback
, bus
);
3612 r
= sd_event_source_set_priority(bus
->time_event_source
, priority
);
3616 r
= sd_event_source_set_description(bus
->time_event_source
, "bus-time");
3620 r
= sd_event_add_exit(bus
->event
, &bus
->quit_event_source
, quit_callback
, bus
);
3624 r
= sd_event_source_set_description(bus
->quit_event_source
, "bus-exit");
3628 r
= bus_attach_io_events(bus
);
3632 r
= bus_attach_inotify_event(bus
);
3639 sd_bus_detach_event(bus
);
3643 _public_
int sd_bus_detach_event(sd_bus
*bus
) {
3644 assert_return(bus
, -EINVAL
);
3645 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3650 bus_detach_io_events(bus
);
3651 bus_detach_inotify_event(bus
);
3653 if (bus
->time_event_source
) {
3654 sd_event_source_set_enabled(bus
->time_event_source
, SD_EVENT_OFF
);
3655 bus
->time_event_source
= sd_event_source_unref(bus
->time_event_source
);
3658 if (bus
->quit_event_source
) {
3659 sd_event_source_set_enabled(bus
->quit_event_source
, SD_EVENT_OFF
);
3660 bus
->quit_event_source
= sd_event_source_unref(bus
->quit_event_source
);
3663 bus
->event
= sd_event_unref(bus
->event
);
3667 _public_ sd_event
* sd_bus_get_event(sd_bus
*bus
) {
3668 assert_return(bus
, NULL
);
3673 _public_ sd_bus_message
* sd_bus_get_current_message(sd_bus
*bus
) {
3674 assert_return(bus
, NULL
);
3676 return bus
->current_message
;
3679 _public_ sd_bus_slot
* sd_bus_get_current_slot(sd_bus
*bus
) {
3680 assert_return(bus
, NULL
);
3682 return bus
->current_slot
;
3685 _public_ sd_bus_message_handler_t
sd_bus_get_current_handler(sd_bus
*bus
) {
3686 assert_return(bus
, NULL
);
3688 return bus
->current_handler
;
3691 _public_
void* sd_bus_get_current_userdata(sd_bus
*bus
) {
3692 assert_return(bus
, NULL
);
3694 return bus
->current_userdata
;
3697 static int bus_default(int (*bus_open
)(sd_bus
**), sd_bus
**default_bus
, sd_bus
**ret
) {
3702 assert(default_bus
);
3705 return !!*default_bus
;
3708 *ret
= sd_bus_ref(*default_bus
);
3716 b
->default_bus_ptr
= default_bus
;
3724 _public_
int sd_bus_default_system(sd_bus
**ret
) {
3725 return bus_default(sd_bus_open_system
, &default_system_bus
, ret
);
3728 _public_
int sd_bus_default_user(sd_bus
**ret
) {
3729 return bus_default(sd_bus_open_user
, &default_user_bus
, ret
);
3732 _public_
int sd_bus_default(sd_bus
**ret
) {
3733 int (*bus_open
)(sd_bus
**) = NULL
;
3736 busp
= bus_choose_default(&bus_open
);
3737 return bus_default(bus_open
, busp
, ret
);
3740 _public_
int sd_bus_get_tid(sd_bus
*b
, pid_t
*tid
) {
3741 assert_return(b
, -EINVAL
);
3742 assert_return(tid
, -EINVAL
);
3743 assert_return(!bus_pid_changed(b
), -ECHILD
);
3751 return sd_event_get_tid(b
->event
, tid
);
3756 _public_
int sd_bus_path_encode(const char *prefix
, const char *external_id
, char **ret_path
) {
3757 _cleanup_free_
char *e
= NULL
;
3760 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3761 assert_return(external_id
, -EINVAL
);
3762 assert_return(ret_path
, -EINVAL
);
3764 e
= bus_label_escape(external_id
);
3768 ret
= path_join(prefix
, e
);
3776 _public_
int sd_bus_path_decode(const char *path
, const char *prefix
, char **external_id
) {
3780 assert_return(object_path_is_valid(path
), -EINVAL
);
3781 assert_return(object_path_is_valid(prefix
), -EINVAL
);
3782 assert_return(external_id
, -EINVAL
);
3784 e
= object_path_startswith(path
, prefix
);
3786 *external_id
= NULL
;
3790 ret
= bus_label_unescape(e
);
3798 _public_
int sd_bus_path_encode_many(char **out
, const char *path_template
, ...) {
3799 _cleanup_strv_free_
char **labels
= NULL
;
3800 char *path
, *path_pos
, **label_pos
;
3801 const char *sep
, *template_pos
;
3806 assert_return(out
, -EINVAL
);
3807 assert_return(path_template
, -EINVAL
);
3809 path_length
= strlen(path_template
);
3811 va_start(list
, path_template
);
3812 for (sep
= strchr(path_template
, '%'); sep
; sep
= strchr(sep
+ 1, '%')) {
3816 arg
= va_arg(list
, const char *);
3822 label
= bus_label_escape(arg
);
3828 r
= strv_consume(&labels
, label
);
3834 /* add label length, but account for the format character */
3835 path_length
+= strlen(label
) - 1;
3839 path
= malloc(path_length
+ 1);
3846 for (template_pos
= path_template
; *template_pos
; ) {
3847 sep
= strchrnul(template_pos
, '%');
3848 path_pos
= mempcpy(path_pos
, template_pos
, sep
- template_pos
);
3852 path_pos
= stpcpy(path_pos
, *label_pos
++);
3853 template_pos
= sep
+ 1;
3861 _public_
int sd_bus_path_decode_many(const char *path
, const char *path_template
, ...) {
3862 _cleanup_strv_free_
char **labels
= NULL
;
3863 const char *template_pos
, *path_pos
;
3869 * This decodes an object-path based on a template argument. The
3870 * template consists of a verbatim path, optionally including special
3873 * - Each occurrence of '%' in the template matches an arbitrary
3874 * substring of a label in the given path. At most one such
3875 * directive is allowed per label. For each such directive, the
3876 * caller must provide an output parameter (char **) via va_arg. If
3877 * NULL is passed, the given label is verified, but not returned.
3878 * For each matched label, the *decoded* label is stored in the
3879 * passed output argument, and the caller is responsible to free
3880 * it. Note that the output arguments are only modified if the
3881 * actually path matched the template. Otherwise, they're left
3884 * This function returns <0 on error, 0 if the path does not match the
3885 * template, 1 if it matched.
3888 assert_return(path
, -EINVAL
);
3889 assert_return(path_template
, -EINVAL
);
3893 for (template_pos
= path_template
; *template_pos
; ) {
3898 /* verify everything until the next '%' matches verbatim */
3899 sep
= strchrnul(template_pos
, '%');
3900 length
= sep
- template_pos
;
3901 if (strncmp(path_pos
, template_pos
, length
))
3905 template_pos
+= length
;
3910 /* We found the next '%' character. Everything up until here
3911 * matched. We now skip ahead to the end of this label and make
3912 * sure it matches the tail of the label in the path. Then we
3913 * decode the string in-between and save it for later use. */
3915 ++template_pos
; /* skip over '%' */
3917 sep
= strchrnul(template_pos
, '/');
3918 length
= sep
- template_pos
; /* length of suffix to match verbatim */
3920 /* verify the suffixes match */
3921 sep
= strchrnul(path_pos
, '/');
3922 if (sep
- path_pos
< (ssize_t
)length
||
3923 strncmp(sep
- length
, template_pos
, length
))
3926 template_pos
+= length
; /* skip over matched label */
3927 length
= sep
- path_pos
- length
; /* length of sub-label to decode */
3929 /* store unescaped label for later use */
3930 label
= bus_label_unescape_n(path_pos
, length
);
3934 r
= strv_consume(&labels
, label
);
3938 path_pos
= sep
; /* skip decoded label and suffix */
3941 /* end of template must match end of path */
3945 /* copy the labels over to the caller */
3946 va_start(list
, path_template
);
3947 for (label_pos
= labels
; label_pos
&& *label_pos
; ++label_pos
) {
3950 arg
= va_arg(list
, char **);
3958 labels
= mfree(labels
);
3962 _public_
int sd_bus_try_close(sd_bus
*bus
) {
3963 assert_return(bus
, -EINVAL
);
3964 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3965 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3970 _public_
int sd_bus_get_description(sd_bus
*bus
, const char **description
) {
3971 assert_return(bus
, -EINVAL
);
3972 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3973 assert_return(description
, -EINVAL
);
3974 assert_return(bus
->description
, -ENXIO
);
3975 assert_return(!bus_pid_changed(bus
), -ECHILD
);
3977 if (bus
->description
)
3978 *description
= bus
->description
;
3979 else if (bus
->is_system
)
3980 *description
= "system";
3981 else if (bus
->is_user
)
3982 *description
= "user";
3984 *description
= NULL
;
3989 _public_
int sd_bus_get_scope(sd_bus
*bus
, const char **scope
) {
3990 assert_return(bus
, -EINVAL
);
3991 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
3992 assert_return(scope
, -EINVAL
);
3993 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4000 if (bus
->is_system
) {
4008 _public_
int sd_bus_get_address(sd_bus
*bus
, const char **address
) {
4010 assert_return(bus
, -EINVAL
);
4011 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4012 assert_return(address
, -EINVAL
);
4013 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4016 *address
= bus
->address
;
4023 _public_
int sd_bus_get_creds_mask(sd_bus
*bus
, uint64_t *mask
) {
4024 assert_return(bus
, -EINVAL
);
4025 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4026 assert_return(mask
, -EINVAL
);
4027 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4029 *mask
= bus
->creds_mask
;
4033 _public_
int sd_bus_is_bus_client(sd_bus
*bus
) {
4034 assert_return(bus
, -EINVAL
);
4035 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4036 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4038 return bus
->bus_client
;
4041 _public_
int sd_bus_is_server(sd_bus
*bus
) {
4042 assert_return(bus
, -EINVAL
);
4043 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4044 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4046 return bus
->is_server
;
4049 _public_
int sd_bus_is_anonymous(sd_bus
*bus
) {
4050 assert_return(bus
, -EINVAL
);
4051 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4052 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4054 return bus
->anonymous_auth
;
4057 _public_
int sd_bus_is_trusted(sd_bus
*bus
) {
4058 assert_return(bus
, -EINVAL
);
4059 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4060 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4062 return bus
->trusted
;
4065 _public_
int sd_bus_is_monitor(sd_bus
*bus
) {
4066 assert_return(bus
, -EINVAL
);
4067 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4068 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4070 return bus
->is_monitor
;
4073 static void flush_close(sd_bus
*bus
) {
4077 /* Flushes and closes the specified bus. We take a ref before,
4078 * to ensure the flushing does not cause the bus to be
4081 sd_bus_flush_close_unref(sd_bus_ref(bus
));
4084 _public_
void sd_bus_default_flush_close(void) {
4085 flush_close(default_starter_bus
);
4086 flush_close(default_user_bus
);
4087 flush_close(default_system_bus
);
4090 _public_
int sd_bus_set_exit_on_disconnect(sd_bus
*bus
, int b
) {
4091 assert_return(bus
, -EINVAL
);
4092 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4094 /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
4095 * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
4096 * from the client side. */
4097 bus
->exit_on_disconnect
= b
;
4099 /* If the exit condition was triggered already, exit immediately. */
4100 return bus_exit_now(bus
);
4103 _public_
int sd_bus_get_exit_on_disconnect(sd_bus
*bus
) {
4104 assert_return(bus
, -EINVAL
);
4105 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4107 return bus
->exit_on_disconnect
;
4110 _public_
int sd_bus_set_sender(sd_bus
*bus
, const char *sender
) {
4111 assert_return(bus
, -EINVAL
);
4112 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4113 assert_return(!bus
->bus_client
, -EPERM
);
4114 assert_return(!sender
|| service_name_is_valid(sender
), -EINVAL
);
4116 return free_and_strdup(&bus
->patch_sender
, sender
);
4119 _public_
int sd_bus_get_sender(sd_bus
*bus
, const char **ret
) {
4120 assert_return(bus
, -EINVAL
);
4121 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4122 assert_return(ret
, -EINVAL
);
4124 if (!bus
->patch_sender
)
4127 *ret
= bus
->patch_sender
;
4131 _public_
int sd_bus_get_n_queued_read(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
->rqueue_size
;
4141 _public_
int sd_bus_get_n_queued_write(sd_bus
*bus
, uint64_t *ret
) {
4142 assert_return(bus
, -EINVAL
);
4143 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4144 assert_return(!bus_pid_changed(bus
), -ECHILD
);
4145 assert_return(ret
, -EINVAL
);
4147 *ret
= bus
->wqueue_size
;
4151 _public_
int sd_bus_set_method_call_timeout(sd_bus
*bus
, uint64_t usec
) {
4152 assert_return(bus
, -EINVAL
);
4153 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4155 bus
->method_call_timeout
= usec
;
4159 _public_
int sd_bus_get_method_call_timeout(sd_bus
*bus
, uint64_t *ret
) {
4163 assert_return(bus
, -EINVAL
);
4164 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4165 assert_return(ret
, -EINVAL
);
4167 if (bus
->method_call_timeout
!= 0) {
4168 *ret
= bus
->method_call_timeout
;
4172 e
= secure_getenv("SYSTEMD_BUS_TIMEOUT");
4173 if (e
&& parse_sec(e
, &usec
) >= 0 && usec
!= 0) {
4174 /* Save the parsed value to avoid multiple parsing. To change the timeout value,
4175 * use sd_bus_set_method_call_timeout() instead of setenv(). */
4176 *ret
= bus
->method_call_timeout
= usec
;
4180 *ret
= bus
->method_call_timeout
= BUS_DEFAULT_TIMEOUT
;
4184 _public_
int sd_bus_set_close_on_exit(sd_bus
*bus
, int b
) {
4185 assert_return(bus
, -EINVAL
);
4186 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4188 bus
->close_on_exit
= b
;
4192 _public_
int sd_bus_get_close_on_exit(sd_bus
*bus
) {
4193 assert_return(bus
, -EINVAL
);
4194 assert_return(bus
= bus_resolve(bus
), -ENOPKG
);
4196 return bus
->close_on_exit
;