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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
40ca29a1 | 2 | |
a8fbdf54 TA |
3 | #include <errno.h> |
4 | #include <fcntl.h> | |
5 | #include <inttypes.h> | |
a8fbdf54 | 6 | #include <stdlib.h> |
a8fbdf54 TA |
7 | #include <sys/ioctl.h> |
8 | #include <sys/resource.h> | |
0c842e0a | 9 | #include <sys/socket.h> |
a8fbdf54 | 10 | #include <unistd.h> |
0c842e0a | 11 | |
4f5dd394 | 12 | #include "sd-bus.h" |
ebd011d9 LP |
13 | #include "sd-daemon.h" |
14 | #include "sd-event.h" | |
a8fbdf54 | 15 | #include "sd-id128.h" |
d53d9474 | 16 | |
73d3ac8e | 17 | #include "bus-common-errors.h" |
d53d9474 LP |
18 | #include "bus-internal.h" |
19 | #include "bus-label.h" | |
3ffd4af2 | 20 | #include "bus-util.h" |
657ee2d8 | 21 | #include "path-util.h" |
269e4d2d | 22 | #include "socket-util.h" |
15a5e950 | 23 | #include "stdio-util.h" |
40ca29a1 | 24 | |
19070062 | 25 | static int name_owner_change_callback(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) { |
99534007 | 26 | sd_event *e = ASSERT_PTR(userdata); |
40ca29a1 | 27 | |
40ca29a1 | 28 | assert(m); |
40ca29a1 | 29 | |
19070062 | 30 | sd_bus_close(sd_bus_message_get_bus(m)); |
6203e07a | 31 | sd_event_exit(e, 0); |
b27adf35 | 32 | |
40ca29a1 LP |
33 | return 1; |
34 | } | |
35 | ||
fb293b3c ZJS |
36 | int bus_log_address_error(int r, BusTransport transport) { |
37 | bool hint = transport == BUS_TRANSPORT_LOCAL && r == -ENOMEDIUM; | |
38 | ||
237fbb67 | 39 | return log_error_errno(r, |
fb293b3c ZJS |
40 | hint ? "Failed to set bus address: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)" : |
41 | "Failed to set bus address: %m"); | |
237fbb67 ZJS |
42 | } |
43 | ||
10a7340a ZJS |
44 | int bus_log_connect_error(int r, BusTransport transport) { |
45 | bool hint_vars = transport == BUS_TRANSPORT_LOCAL && r == -ENOMEDIUM, | |
46 | hint_addr = transport == BUS_TRANSPORT_LOCAL && ERRNO_IS_PRIVILEGE(r); | |
47 | ||
237fbb67 | 48 | return log_error_errno(r, |
10a7340a ZJS |
49 | r == hint_vars ? "Failed to connect to bus: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=<user>@.host --user to connect to bus of other user)" : |
50 | r == hint_addr ? "Failed to connect to bus: Operation not permitted (consider using --machine=<user>@.host --user to connect to bus of other user)" : | |
51 | "Failed to connect to bus: %m"); | |
237fbb67 ZJS |
52 | } |
53 | ||
6203e07a | 54 | int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name) { |
75152a4d | 55 | const char *match; |
11846aa7 | 56 | const char *unique; |
40ca29a1 LP |
57 | int r; |
58 | ||
59 | assert(e); | |
60 | assert(bus); | |
61 | assert(name); | |
62 | ||
6203e07a LP |
63 | /* We unregister the name here and then wait for the |
64 | * NameOwnerChanged signal for this event to arrive before we | |
65 | * quit. We do this in order to make sure that any queued | |
66 | * requests are still processed before we really exit. */ | |
67 | ||
11846aa7 | 68 | r = sd_bus_get_unique_name(bus, &unique); |
40ca29a1 LP |
69 | if (r < 0) |
70 | return r; | |
71 | ||
75152a4d LP |
72 | match = strjoina( |
73 | "sender='org.freedesktop.DBus'," | |
74 | "type='signal'," | |
75 | "interface='org.freedesktop.DBus'," | |
76 | "member='NameOwnerChanged'," | |
77 | "path='/org/freedesktop/DBus'," | |
78 | "arg0='", name, "',", | |
79 | "arg1='", unique, "',", | |
80 | "arg2=''"); | |
81 | ||
82 | r = sd_bus_add_match_async(bus, NULL, match, name_owner_change_callback, NULL, e); | |
40ca29a1 LP |
83 | if (r < 0) |
84 | return r; | |
85 | ||
75152a4d | 86 | r = sd_bus_release_name_async(bus, NULL, name, NULL, NULL); |
40ca29a1 LP |
87 | if (r < 0) |
88 | return r; | |
89 | ||
40ca29a1 LP |
90 | return 0; |
91 | } | |
92 | ||
37224a5f LP |
93 | int bus_event_loop_with_idle( |
94 | sd_event *e, | |
95 | sd_bus *bus, | |
96 | const char *name, | |
97 | usec_t timeout, | |
98 | check_idle_t check_idle, | |
99 | void *userdata) { | |
40ca29a1 | 100 | bool exiting = false; |
6203e07a | 101 | int r, code; |
40ca29a1 LP |
102 | |
103 | assert(e); | |
104 | assert(bus); | |
105 | assert(name); | |
106 | ||
107 | for (;;) { | |
37224a5f LP |
108 | bool idle; |
109 | ||
40ca29a1 LP |
110 | r = sd_event_get_state(e); |
111 | if (r < 0) | |
112 | return r; | |
40ca29a1 LP |
113 | if (r == SD_EVENT_FINISHED) |
114 | break; | |
115 | ||
37224a5f LP |
116 | if (check_idle) |
117 | idle = check_idle(userdata); | |
118 | else | |
119 | idle = true; | |
120 | ||
f5fbe71d | 121 | r = sd_event_run(e, exiting || !idle ? UINT64_MAX : timeout); |
40ca29a1 LP |
122 | if (r < 0) |
123 | return r; | |
124 | ||
a8ba6cd1 | 125 | if (r == 0 && !exiting && idle) { |
99cde098 ZJS |
126 | /* Inform the service manager that we are going down, so that it will queue all |
127 | * further start requests, instead of assuming we are already running. */ | |
128 | sd_notify(false, "STOPPING=1"); | |
b27adf35 | 129 | |
99cde098 | 130 | r = bus_async_unregister_and_exit(e, bus, name); |
40ca29a1 LP |
131 | if (r < 0) |
132 | return r; | |
133 | ||
99cde098 ZJS |
134 | exiting = true; |
135 | continue; | |
40ca29a1 LP |
136 | } |
137 | } | |
138 | ||
6203e07a LP |
139 | r = sd_event_get_exit_code(e, &code); |
140 | if (r < 0) | |
141 | return r; | |
142 | ||
143 | return code; | |
40ca29a1 LP |
144 | } |
145 | ||
5fd38859 | 146 | int bus_name_has_owner(sd_bus *c, const char *name, sd_bus_error *error) { |
4afd3348 | 147 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *rep = NULL; |
5fd38859 DH |
148 | int r, has_owner = 0; |
149 | ||
150 | assert(c); | |
151 | assert(name); | |
152 | ||
153 | r = sd_bus_call_method(c, | |
154 | "org.freedesktop.DBus", | |
155 | "/org/freedesktop/dbus", | |
156 | "org.freedesktop.DBus", | |
157 | "NameHasOwner", | |
158 | error, | |
159 | &rep, | |
160 | "s", | |
161 | name); | |
162 | if (r < 0) | |
163 | return r; | |
164 | ||
165 | r = sd_bus_message_read_basic(rep, 'b', &has_owner); | |
166 | if (r < 0) | |
167 | return sd_bus_error_set_errno(error, r); | |
168 | ||
169 | return has_owner; | |
170 | } | |
171 | ||
73d3ac8e ZJS |
172 | bool bus_error_is_unknown_service(const sd_bus_error *error) { |
173 | return sd_bus_error_has_names(error, | |
174 | SD_BUS_ERROR_SERVICE_UNKNOWN, | |
175 | SD_BUS_ERROR_NAME_HAS_NO_OWNER, | |
176 | BUS_ERROR_NO_SUCH_UNIT); | |
177 | } | |
178 | ||
718db961 | 179 | int bus_check_peercred(sd_bus *c) { |
0c842e0a | 180 | struct ucred ucred; |
3e641e36 | 181 | int fd, r; |
0c842e0a TG |
182 | |
183 | assert(c); | |
184 | ||
185 | fd = sd_bus_get_fd(c); | |
0f8bd8de LP |
186 | if (fd < 0) |
187 | return fd; | |
0c842e0a | 188 | |
3e641e36 LP |
189 | r = getpeercred(fd, &ucred); |
190 | if (r < 0) | |
191 | return r; | |
0c842e0a TG |
192 | |
193 | if (ucred.uid != 0 && ucred.uid != geteuid()) | |
194 | return -EPERM; | |
195 | ||
196 | return 1; | |
197 | } | |
198 | ||
c90821aa | 199 | int bus_connect_system_systemd(sd_bus **ret_bus) { |
b1a4981a | 200 | _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL; |
0c842e0a | 201 | int r; |
0c842e0a | 202 | |
c90821aa | 203 | assert(ret_bus); |
0c842e0a | 204 | |
0f8bd8de | 205 | if (geteuid() != 0) |
c90821aa | 206 | return sd_bus_default_system(ret_bus); |
a1da8583 | 207 | |
a132bef0 ZJS |
208 | /* If we are root then let's talk directly to the system |
209 | * instance, instead of going via the bus */ | |
a6aa8912 LP |
210 | |
211 | r = sd_bus_new(&bus); | |
0f8bd8de LP |
212 | if (r < 0) |
213 | return r; | |
a1da8583 | 214 | |
a6aa8912 LP |
215 | r = sd_bus_set_address(bus, "unix:path=/run/systemd/private"); |
216 | if (r < 0) | |
217 | return r; | |
218 | ||
219 | r = sd_bus_start(bus); | |
220 | if (r < 0) | |
c90821aa | 221 | return sd_bus_default_system(ret_bus); |
a6aa8912 | 222 | |
0f8bd8de | 223 | r = bus_check_peercred(bus); |
a1da8583 TG |
224 | if (r < 0) |
225 | return r; | |
226 | ||
c90821aa | 227 | *ret_bus = TAKE_PTR(bus); |
a1da8583 TG |
228 | return 0; |
229 | } | |
230 | ||
c90821aa | 231 | int bus_connect_user_systemd(sd_bus **ret_bus) { |
b1a4981a | 232 | _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL; |
a6aa8912 | 233 | _cleanup_free_ char *ee = NULL; |
41dd15e4 LP |
234 | const char *e; |
235 | int r; | |
236 | ||
c90821aa | 237 | assert(ret_bus); |
41dd15e4 LP |
238 | |
239 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
537220d9 | 240 | if (!e) |
c90821aa | 241 | return sd_bus_default_user(ret_bus); |
537220d9 | 242 | |
a6aa8912 LP |
243 | ee = bus_address_escape(e); |
244 | if (!ee) | |
537220d9 | 245 | return -ENOMEM; |
41dd15e4 LP |
246 | |
247 | r = sd_bus_new(&bus); | |
248 | if (r < 0) | |
249 | return r; | |
250 | ||
605405c6 | 251 | bus->address = strjoin("unix:path=", ee, "/systemd/private"); |
a6aa8912 LP |
252 | if (!bus->address) |
253 | return -ENOMEM; | |
41dd15e4 LP |
254 | |
255 | r = sd_bus_start(bus); | |
256 | if (r < 0) | |
c90821aa | 257 | return sd_bus_default_user(ret_bus); |
41dd15e4 LP |
258 | |
259 | r = bus_check_peercred(bus); | |
260 | if (r < 0) | |
261 | return r; | |
262 | ||
c90821aa | 263 | *ret_bus = TAKE_PTR(bus); |
41dd15e4 LP |
264 | return 0; |
265 | } | |
266 | ||
1b630835 LP |
267 | int bus_connect_transport( |
268 | BusTransport transport, | |
269 | const char *host, | |
270 | bool user, | |
271 | sd_bus **ret) { | |
272 | ||
b1a4981a | 273 | _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL; |
d21ed1ea LP |
274 | int r; |
275 | ||
276 | assert(transport >= 0); | |
277 | assert(transport < _BUS_TRANSPORT_MAX); | |
38303498 | 278 | assert(ret); |
d21ed1ea LP |
279 | |
280 | assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL); | |
1b630835 | 281 | assert_return(transport != BUS_TRANSPORT_REMOTE || !user, -EOPNOTSUPP); |
d21ed1ea LP |
282 | |
283 | switch (transport) { | |
284 | ||
285 | case BUS_TRANSPORT_LOCAL: | |
286 | if (user) | |
38303498 | 287 | r = sd_bus_default_user(&bus); |
fb507898 | 288 | else { |
d7a0f1f4 | 289 | if (sd_booted() <= 0) |
fb507898 | 290 | /* Print a friendly message when the local system is actually not running systemd as PID 1. */ |
d7a0f1f4 FS |
291 | return log_error_errno(SYNTHETIC_ERRNO(EHOSTDOWN), |
292 | "System has not been booted with systemd as init system (PID 1). Can't operate."); | |
fb507898 YW |
293 | r = sd_bus_default_system(&bus); |
294 | } | |
d21ed1ea LP |
295 | break; |
296 | ||
297 | case BUS_TRANSPORT_REMOTE: | |
38303498 | 298 | r = sd_bus_open_system_remote(&bus, host); |
41dd15e4 LP |
299 | break; |
300 | ||
de33fc62 | 301 | case BUS_TRANSPORT_MACHINE: |
1b630835 LP |
302 | if (user) |
303 | r = sd_bus_open_user_machine(&bus, host); | |
304 | else | |
305 | r = sd_bus_open_system_machine(&bus, host); | |
41dd15e4 LP |
306 | break; |
307 | ||
308 | default: | |
04499a70 | 309 | assert_not_reached(); |
41dd15e4 | 310 | } |
38303498 LP |
311 | if (r < 0) |
312 | return r; | |
41dd15e4 | 313 | |
38303498 LP |
314 | r = sd_bus_set_exit_on_disconnect(bus, true); |
315 | if (r < 0) | |
316 | return r; | |
317 | ||
1cc6c93a | 318 | *ret = TAKE_PTR(bus); |
38303498 | 319 | return 0; |
41dd15e4 LP |
320 | } |
321 | ||
266f3e26 | 322 | int bus_connect_transport_systemd(BusTransport transport, const char *host, bool user, sd_bus **bus) { |
41dd15e4 LP |
323 | assert(transport >= 0); |
324 | assert(transport < _BUS_TRANSPORT_MAX); | |
325 | assert(bus); | |
326 | ||
327 | assert_return((transport == BUS_TRANSPORT_LOCAL) == !host, -EINVAL); | |
15411c0c | 328 | assert_return(transport == BUS_TRANSPORT_LOCAL || !user, -EOPNOTSUPP); |
41dd15e4 LP |
329 | |
330 | switch (transport) { | |
331 | ||
332 | case BUS_TRANSPORT_LOCAL: | |
333 | if (user) | |
73e91092 ZJS |
334 | return bus_connect_user_systemd(bus); |
335 | ||
336 | if (sd_booted() <= 0) | |
337 | /* Print a friendly message when the local system is actually not running systemd as PID 1. */ | |
338 | return log_error_errno(SYNTHETIC_ERRNO(EHOSTDOWN), | |
339 | "System has not been booted with systemd as init system (PID 1). Can't operate."); | |
340 | return bus_connect_system_systemd(bus); | |
41dd15e4 LP |
341 | |
342 | case BUS_TRANSPORT_REMOTE: | |
73e91092 | 343 | return sd_bus_open_system_remote(bus, host); |
d21ed1ea | 344 | |
de33fc62 | 345 | case BUS_TRANSPORT_MACHINE: |
73e91092 | 346 | return sd_bus_open_system_machine(bus, host); |
d21ed1ea LP |
347 | |
348 | default: | |
04499a70 | 349 | assert_not_reached(); |
d21ed1ea | 350 | } |
d21ed1ea | 351 | } |
e6504030 | 352 | |
98a4c30b DH |
353 | /** |
354 | * bus_path_encode_unique() - encode unique object path | |
355 | * @b: bus connection or NULL | |
356 | * @prefix: object path prefix | |
357 | * @sender_id: unique-name of client, or NULL | |
358 | * @external_id: external ID to be chosen by client, or NULL | |
359 | * @ret_path: storage for encoded object path pointer | |
360 | * | |
361 | * Whenever we provide a bus API that allows clients to create and manage | |
362 | * server-side objects, we need to provide a unique name for these objects. If | |
363 | * we let the server choose the name, we suffer from a race condition: If a | |
364 | * client creates an object asynchronously, it cannot destroy that object until | |
365 | * it received the method reply. It cannot know the name of the new object, | |
366 | * thus, it cannot destroy it. Furthermore, it enforces a round-trip. | |
367 | * | |
368 | * Therefore, many APIs allow the client to choose the unique name for newly | |
369 | * created objects. There're two problems to solve, though: | |
370 | * 1) Object names are usually defined via dbus object paths, which are | |
371 | * usually globally namespaced. Therefore, multiple clients must be able | |
372 | * to choose unique object names without interference. | |
373 | * 2) If multiple libraries share the same bus connection, they must be | |
374 | * able to choose unique object names without interference. | |
375 | * The first problem is solved easily by prefixing a name with the | |
376 | * unique-bus-name of a connection. The server side must enforce this and | |
377 | * reject any other name. The second problem is solved by providing unique | |
378 | * suffixes from within sd-bus. | |
379 | * | |
380 | * This helper allows clients to create unique object-paths. It uses the | |
381 | * template '/prefix/sender_id/external_id' and returns the new path in | |
382 | * @ret_path (must be freed by the caller). | |
383 | * If @sender_id is NULL, the unique-name of @b is used. If @external_id is | |
384 | * NULL, this function allocates a unique suffix via @b (by requesting a new | |
385 | * cookie). If both @sender_id and @external_id are given, @b can be passed as | |
386 | * NULL. | |
387 | * | |
388 | * Returns: 0 on success, negative error code on failure. | |
389 | */ | |
390 | int bus_path_encode_unique(sd_bus *b, const char *prefix, const char *sender_id, const char *external_id, char **ret_path) { | |
391 | _cleanup_free_ char *sender_label = NULL, *external_label = NULL; | |
392 | char external_buf[DECIMAL_STR_MAX(uint64_t)], *p; | |
393 | int r; | |
394 | ||
395 | assert_return(b || (sender_id && external_id), -EINVAL); | |
5453a4b1 | 396 | assert_return(sd_bus_object_path_is_valid(prefix), -EINVAL); |
98a4c30b DH |
397 | assert_return(ret_path, -EINVAL); |
398 | ||
399 | if (!sender_id) { | |
400 | r = sd_bus_get_unique_name(b, &sender_id); | |
401 | if (r < 0) | |
402 | return r; | |
403 | } | |
404 | ||
405 | if (!external_id) { | |
406 | xsprintf(external_buf, "%"PRIu64, ++b->cookie); | |
407 | external_id = external_buf; | |
408 | } | |
409 | ||
410 | sender_label = bus_label_escape(sender_id); | |
411 | if (!sender_label) | |
412 | return -ENOMEM; | |
413 | ||
414 | external_label = bus_label_escape(external_id); | |
415 | if (!external_label) | |
416 | return -ENOMEM; | |
417 | ||
657ee2d8 | 418 | p = path_join(prefix, sender_label, external_label); |
98a4c30b DH |
419 | if (!p) |
420 | return -ENOMEM; | |
421 | ||
422 | *ret_path = p; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | /** | |
427 | * bus_path_decode_unique() - decode unique object path | |
428 | * @path: object path to decode | |
429 | * @prefix: object path prefix | |
430 | * @ret_sender: output parameter for sender-id label | |
431 | * @ret_external: output parameter for external-id label | |
432 | * | |
433 | * This does the reverse of bus_path_encode_unique() (see its description for | |
434 | * details). Both trailing labels, sender-id and external-id, are unescaped and | |
435 | * returned in the given output parameters (the caller must free them). | |
436 | * | |
437 | * Note that this function returns 0 if the path does not match the template | |
438 | * (see bus_path_encode_unique()), 1 if it matched. | |
439 | * | |
440 | * Returns: Negative error code on failure, 0 if the given object path does not | |
441 | * match the template (return parameters are set to NULL), 1 if it was | |
442 | * parsed successfully (return parameters contain allocated labels). | |
443 | */ | |
444 | int bus_path_decode_unique(const char *path, const char *prefix, char **ret_sender, char **ret_external) { | |
445 | const char *p, *q; | |
446 | char *sender, *external; | |
447 | ||
5453a4b1 ZJS |
448 | assert(sd_bus_object_path_is_valid(path)); |
449 | assert(sd_bus_object_path_is_valid(prefix)); | |
98a4c30b DH |
450 | assert(ret_sender); |
451 | assert(ret_external); | |
452 | ||
453 | p = object_path_startswith(path, prefix); | |
454 | if (!p) { | |
455 | *ret_sender = NULL; | |
456 | *ret_external = NULL; | |
457 | return 0; | |
458 | } | |
459 | ||
460 | q = strchr(p, '/'); | |
461 | if (!q) { | |
462 | *ret_sender = NULL; | |
463 | *ret_external = NULL; | |
464 | return 0; | |
465 | } | |
466 | ||
467 | sender = bus_label_unescape_n(p, q - p); | |
468 | external = bus_label_unescape(q + 1); | |
469 | if (!sender || !external) { | |
470 | free(sender); | |
471 | free(external); | |
472 | return -ENOMEM; | |
473 | } | |
474 | ||
475 | *ret_sender = sender; | |
476 | *ret_external = external; | |
477 | return 1; | |
478 | } | |
057171ef | 479 | |
984794ba LP |
480 | int bus_track_add_name_many(sd_bus_track *t, char **l) { |
481 | int r = 0; | |
984794ba LP |
482 | |
483 | assert(t); | |
484 | ||
485 | /* Continues adding after failure, and returns the first failure. */ | |
486 | ||
487 | STRV_FOREACH(i, l) { | |
488 | int k; | |
489 | ||
490 | k = sd_bus_track_add_name(t, *i); | |
491 | if (k < 0 && r >= 0) | |
492 | r = k; | |
493 | } | |
494 | ||
495 | return r; | |
496 | } | |
d7afd945 | 497 | |
0ddf50ff | 498 | int bus_open_system_watch_bind_with_description(sd_bus **ret, const char *description) { |
b1a4981a | 499 | _cleanup_(sd_bus_close_unrefp) sd_bus *bus = NULL; |
d7afd945 LP |
500 | const char *e; |
501 | int r; | |
502 | ||
503 | assert(ret); | |
504 | ||
61252bae ZJS |
505 | /* Match like sd_bus_open_system(), but with the "watch_bind" feature and the Connected() signal |
506 | * turned on. */ | |
d7afd945 LP |
507 | |
508 | r = sd_bus_new(&bus); | |
509 | if (r < 0) | |
510 | return r; | |
511 | ||
0ddf50ff YW |
512 | if (description) { |
513 | r = sd_bus_set_description(bus, description); | |
514 | if (r < 0) | |
515 | return r; | |
516 | } | |
517 | ||
d7afd945 LP |
518 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
519 | if (!e) | |
520 | e = DEFAULT_SYSTEM_BUS_ADDRESS; | |
521 | ||
522 | r = sd_bus_set_address(bus, e); | |
523 | if (r < 0) | |
524 | return r; | |
525 | ||
526 | r = sd_bus_set_bus_client(bus, true); | |
527 | if (r < 0) | |
528 | return r; | |
529 | ||
d7afd945 LP |
530 | r = sd_bus_negotiate_creds(bus, true, SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_EFFECTIVE_CAPS); |
531 | if (r < 0) | |
532 | return r; | |
533 | ||
534 | r = sd_bus_set_watch_bind(bus, true); | |
535 | if (r < 0) | |
536 | return r; | |
537 | ||
538 | r = sd_bus_set_connected_signal(bus, true); | |
539 | if (r < 0) | |
540 | return r; | |
541 | ||
542 | r = sd_bus_start(bus); | |
543 | if (r < 0) | |
544 | return r; | |
545 | ||
1cc6c93a | 546 | *ret = TAKE_PTR(bus); |
d7afd945 LP |
547 | |
548 | return 0; | |
549 | } | |
906cb2eb | 550 | |
19017acb LP |
551 | int bus_reply_pair_array(sd_bus_message *m, char **l) { |
552 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
19017acb LP |
553 | int r; |
554 | ||
555 | assert(m); | |
556 | ||
61252bae ZJS |
557 | /* Reply to the specified message with a message containing a dictionary put together from the |
558 | * specified strv */ | |
19017acb LP |
559 | |
560 | r = sd_bus_message_new_method_return(m, &reply); | |
561 | if (r < 0) | |
562 | return r; | |
563 | ||
564 | r = sd_bus_message_open_container(reply, 'a', "{ss}"); | |
565 | if (r < 0) | |
566 | return r; | |
567 | ||
568 | STRV_FOREACH_PAIR(k, v, l) { | |
569 | r = sd_bus_message_append(reply, "{ss}", *k, *v); | |
570 | if (r < 0) | |
571 | return r; | |
572 | } | |
573 | ||
574 | r = sd_bus_message_close_container(reply); | |
575 | if (r < 0) | |
576 | return r; | |
577 | ||
578 | return sd_bus_send(NULL, reply, NULL); | |
579 | } | |
2a66c2a1 LP |
580 | |
581 | static void bus_message_unref_wrapper(void *m) { | |
582 | sd_bus_message_unref(m); | |
583 | } | |
584 | ||
585 | const struct hash_ops bus_message_hash_ops = { | |
586 | .hash = trivial_hash_func, | |
587 | .compare = trivial_compare_func, | |
588 | .free_value = bus_message_unref_wrapper, | |
589 | }; |