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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
992c052c | 2 | /*** |
992c052c LP |
3 | ***/ |
4 | ||
b5efdb8a | 5 | #include "alloc-util.h" |
992c052c | 6 | #include "bus-internal.h" |
07630cea | 7 | #include "bus-introspect.h" |
992c052c | 8 | #include "bus-message.h" |
cf0fbc49 | 9 | #include "bus-objects.h" |
992c052c | 10 | #include "bus-signature.h" |
19befb2d | 11 | #include "bus-slot.h" |
07630cea LP |
12 | #include "bus-type.h" |
13 | #include "bus-util.h" | |
14 | #include "set.h" | |
15 | #include "string-util.h" | |
16 | #include "strv.h" | |
992c052c LP |
17 | |
18 | static int node_vtable_get_userdata( | |
19 | sd_bus *bus, | |
20 | const char *path, | |
21 | struct node_vtable *c, | |
f00c3121 LP |
22 | void **userdata, |
23 | sd_bus_error *error) { | |
992c052c | 24 | |
19befb2d | 25 | sd_bus_slot *s; |
00590f82 | 26 | void *u, *found_u; |
992c052c LP |
27 | int r; |
28 | ||
29 | assert(bus); | |
30 | assert(path); | |
31 | assert(c); | |
32 | ||
19befb2d LP |
33 | s = container_of(c, sd_bus_slot, node_vtable); |
34 | u = s->userdata; | |
992c052c | 35 | if (c->find) { |
1b64f838 | 36 | bus->current_slot = sd_bus_slot_ref(s); |
caa82984 | 37 | bus->current_userdata = u; |
00590f82 | 38 | r = c->find(bus, path, c->interface, u, &found_u, error); |
caa82984 | 39 | bus->current_userdata = NULL; |
1b64f838 | 40 | bus->current_slot = sd_bus_slot_unref(s); |
19befb2d | 41 | |
f00c3121 LP |
42 | if (r < 0) |
43 | return r; | |
44 | if (sd_bus_error_is_set(error)) | |
5958d089 | 45 | return -sd_bus_error_get_errno(error); |
f00c3121 | 46 | if (r == 0) |
992c052c | 47 | return r; |
00590f82 AJ |
48 | } else |
49 | found_u = u; | |
992c052c LP |
50 | |
51 | if (userdata) | |
00590f82 | 52 | *userdata = found_u; |
992c052c LP |
53 | |
54 | return 1; | |
55 | } | |
56 | ||
09c8a7c6 | 57 | static void *vtable_method_convert_userdata(const sd_bus_vtable *p, void *u) { |
58 | assert(p); | |
59 | ||
60 | return (uint8_t*) u + p->x.method.offset; | |
61 | } | |
62 | ||
992c052c LP |
63 | static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) { |
64 | assert(p); | |
65 | ||
77a874a3 | 66 | return (uint8_t*) u + p->x.property.offset; |
992c052c LP |
67 | } |
68 | ||
69 | static int vtable_property_get_userdata( | |
70 | sd_bus *bus, | |
71 | const char *path, | |
72 | struct vtable_member *p, | |
f00c3121 LP |
73 | void **userdata, |
74 | sd_bus_error *error) { | |
992c052c LP |
75 | |
76 | void *u; | |
77 | int r; | |
78 | ||
79 | assert(bus); | |
80 | assert(path); | |
81 | assert(p); | |
82 | assert(userdata); | |
83 | ||
f00c3121 | 84 | r = node_vtable_get_userdata(bus, path, p->parent, &u, error); |
992c052c LP |
85 | if (r <= 0) |
86 | return r; | |
68313d3d LP |
87 | if (bus->nodes_modified) |
88 | return 0; | |
992c052c LP |
89 | |
90 | *userdata = vtable_property_convert_userdata(p->vtable, u); | |
91 | return 1; | |
92 | } | |
93 | ||
dfa92725 LP |
94 | static int add_enumerated_to_set( |
95 | sd_bus *bus, | |
96 | const char *prefix, | |
97 | struct node_enumerator *first, | |
f00c3121 LP |
98 | Set *s, |
99 | sd_bus_error *error) { | |
dfa92725 | 100 | |
992c052c LP |
101 | struct node_enumerator *c; |
102 | int r; | |
103 | ||
104 | assert(bus); | |
105 | assert(prefix); | |
106 | assert(s); | |
107 | ||
108 | LIST_FOREACH(enumerators, c, first) { | |
109 | char **children = NULL, **k; | |
1b64f838 | 110 | sd_bus_slot *slot; |
992c052c | 111 | |
68313d3d LP |
112 | if (bus->nodes_modified) |
113 | return 0; | |
114 | ||
1b64f838 LP |
115 | slot = container_of(c, sd_bus_slot, node_enumerator); |
116 | ||
117 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 | 118 | bus->current_userdata = slot->userdata; |
1b64f838 | 119 | r = c->callback(bus, prefix, slot->userdata, &children, error); |
caa82984 | 120 | bus->current_userdata = NULL; |
1b64f838 | 121 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 122 | |
992c052c LP |
123 | if (r < 0) |
124 | return r; | |
f00c3121 | 125 | if (sd_bus_error_is_set(error)) |
5958d089 | 126 | return -sd_bus_error_get_errno(error); |
992c052c LP |
127 | |
128 | STRV_FOREACH(k, children) { | |
129 | if (r < 0) { | |
130 | free(*k); | |
131 | continue; | |
132 | } | |
133 | ||
9ed794a3 | 134 | if (!object_path_is_valid(*k)) { |
992c052c LP |
135 | free(*k); |
136 | r = -EINVAL; | |
137 | continue; | |
138 | } | |
139 | ||
5d66866d LP |
140 | if (!object_path_startswith(*k, prefix)) { |
141 | free(*k); | |
142 | continue; | |
143 | } | |
144 | ||
992c052c | 145 | r = set_consume(s, *k); |
52c7f2b2 LP |
146 | if (r == -EEXIST) |
147 | r = 0; | |
992c052c LP |
148 | } |
149 | ||
150 | free(children); | |
151 | if (r < 0) | |
152 | return r; | |
153 | } | |
154 | ||
155 | return 0; | |
156 | } | |
157 | ||
44eb1add DH |
158 | enum { |
159 | /* if set, add_subtree() works recursively */ | |
ef31828d | 160 | CHILDREN_RECURSIVE = 1 << 0, |
44eb1add | 161 | /* if set, add_subtree() scans object-manager hierarchies recursively */ |
ef31828d | 162 | CHILDREN_SUBHIERARCHIES = 1 << 1, |
44eb1add DH |
163 | }; |
164 | ||
dfa92725 LP |
165 | static int add_subtree_to_set( |
166 | sd_bus *bus, | |
167 | const char *prefix, | |
168 | struct node *n, | |
44eb1add | 169 | unsigned int flags, |
f00c3121 LP |
170 | Set *s, |
171 | sd_bus_error *error) { | |
dfa92725 | 172 | |
992c052c LP |
173 | struct node *i; |
174 | int r; | |
175 | ||
176 | assert(bus); | |
177 | assert(prefix); | |
178 | assert(n); | |
179 | assert(s); | |
180 | ||
f00c3121 | 181 | r = add_enumerated_to_set(bus, prefix, n->enumerators, s, error); |
992c052c LP |
182 | if (r < 0) |
183 | return r; | |
68313d3d LP |
184 | if (bus->nodes_modified) |
185 | return 0; | |
992c052c LP |
186 | |
187 | LIST_FOREACH(siblings, i, n->child) { | |
188 | char *t; | |
189 | ||
5d66866d LP |
190 | if (!object_path_startswith(i->path, prefix)) |
191 | continue; | |
192 | ||
992c052c LP |
193 | t = strdup(i->path); |
194 | if (!t) | |
195 | return -ENOMEM; | |
196 | ||
197 | r = set_consume(s, t); | |
198 | if (r < 0 && r != -EEXIST) | |
199 | return r; | |
200 | ||
44eb1add DH |
201 | if ((flags & CHILDREN_RECURSIVE) && |
202 | ((flags & CHILDREN_SUBHIERARCHIES) || !i->object_managers)) { | |
203 | r = add_subtree_to_set(bus, prefix, i, flags, s, error); | |
2d5c8a27 DH |
204 | if (r < 0) |
205 | return r; | |
206 | if (bus->nodes_modified) | |
207 | return 0; | |
208 | } | |
992c052c LP |
209 | } |
210 | ||
211 | return 0; | |
212 | } | |
213 | ||
dfa92725 LP |
214 | static int get_child_nodes( |
215 | sd_bus *bus, | |
216 | const char *prefix, | |
217 | struct node *n, | |
44eb1add | 218 | unsigned int flags, |
f00c3121 LP |
219 | Set **_s, |
220 | sd_bus_error *error) { | |
dfa92725 | 221 | |
992c052c LP |
222 | Set *s = NULL; |
223 | int r; | |
224 | ||
225 | assert(bus); | |
dfa92725 | 226 | assert(prefix); |
992c052c LP |
227 | assert(n); |
228 | assert(_s); | |
229 | ||
d5099efc | 230 | s = set_new(&string_hash_ops); |
992c052c LP |
231 | if (!s) |
232 | return -ENOMEM; | |
233 | ||
44eb1add | 234 | r = add_subtree_to_set(bus, prefix, n, flags, s, error); |
992c052c LP |
235 | if (r < 0) { |
236 | set_free_free(s); | |
237 | return r; | |
238 | } | |
239 | ||
240 | *_s = s; | |
241 | return 0; | |
242 | } | |
243 | ||
244 | static int node_callbacks_run( | |
245 | sd_bus *bus, | |
246 | sd_bus_message *m, | |
247 | struct node_callback *first, | |
248 | bool require_fallback, | |
249 | bool *found_object) { | |
250 | ||
251 | struct node_callback *c; | |
252 | int r; | |
253 | ||
254 | assert(bus); | |
255 | assert(m); | |
256 | assert(found_object); | |
257 | ||
258 | LIST_FOREACH(callbacks, c, first) { | |
4afd3348 | 259 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 260 | sd_bus_slot *slot; |
ebcf1f97 | 261 | |
68313d3d LP |
262 | if (bus->nodes_modified) |
263 | return 0; | |
264 | ||
992c052c LP |
265 | if (require_fallback && !c->is_fallback) |
266 | continue; | |
267 | ||
268 | *found_object = true; | |
269 | ||
270 | if (c->last_iteration == bus->iteration_counter) | |
271 | continue; | |
272 | ||
68313d3d LP |
273 | c->last_iteration = bus->iteration_counter; |
274 | ||
992c052c LP |
275 | r = sd_bus_message_rewind(m, true); |
276 | if (r < 0) | |
277 | return r; | |
278 | ||
1b64f838 LP |
279 | slot = container_of(c, sd_bus_slot, node_callback); |
280 | ||
281 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
282 | bus->current_handler = c->callback; |
283 | bus->current_userdata = slot->userdata; | |
19070062 | 284 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
285 | bus->current_userdata = NULL; |
286 | bus->current_handler = NULL; | |
1b64f838 | 287 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 288 | |
ebcf1f97 | 289 | r = bus_maybe_reply_error(m, r, &error_buffer); |
992c052c LP |
290 | if (r != 0) |
291 | return r; | |
292 | } | |
293 | ||
294 | return 0; | |
295 | } | |
296 | ||
adacb957 LP |
297 | #define CAPABILITY_SHIFT(x) (((x) >> __builtin_ctzll(_SD_BUS_VTABLE_CAPABILITY_MASK)) & 0xFFFF) |
298 | ||
299 | static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) { | |
adacb957 | 300 | uint64_t cap; |
adacb957 LP |
301 | int r; |
302 | ||
303 | assert(bus); | |
304 | assert(m); | |
305 | assert(c); | |
306 | ||
307 | /* If the entire bus is trusted let's grant access */ | |
308 | if (bus->trusted) | |
309 | return 0; | |
310 | ||
311 | /* If the member is marked UNPRIVILEGED let's grant access */ | |
312 | if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED) | |
313 | return 0; | |
314 | ||
adacb957 LP |
315 | /* Check have the caller has the requested capability |
316 | * set. Note that the flags value contains the capability | |
317 | * number plus one, which we need to subtract here. We do this | |
318 | * so that we have 0 as special value for "default | |
319 | * capability". */ | |
320 | cap = CAPABILITY_SHIFT(c->vtable->flags); | |
321 | if (cap == 0) | |
322 | cap = CAPABILITY_SHIFT(c->parent->vtable[0].flags); | |
323 | if (cap == 0) | |
324 | cap = CAP_SYS_ADMIN; | |
325 | else | |
313cefa1 | 326 | cap--; |
adacb957 | 327 | |
def9a7aa LP |
328 | r = sd_bus_query_sender_privilege(m, cap); |
329 | if (r < 0) | |
330 | return r; | |
adacb957 | 331 | if (r > 0) |
def9a7aa | 332 | return 0; |
adacb957 LP |
333 | |
334 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access to %s.%s() not permitted.", c->interface, c->member); | |
335 | } | |
336 | ||
992c052c LP |
337 | static int method_callbacks_run( |
338 | sd_bus *bus, | |
339 | sd_bus_message *m, | |
340 | struct vtable_member *c, | |
341 | bool require_fallback, | |
342 | bool *found_object) { | |
343 | ||
4afd3348 | 344 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
345 | const char *signature; |
346 | void *u; | |
347 | int r; | |
348 | ||
349 | assert(bus); | |
350 | assert(m); | |
351 | assert(c); | |
352 | assert(found_object); | |
353 | ||
354 | if (require_fallback && !c->parent->is_fallback) | |
355 | return 0; | |
356 | ||
adacb957 LP |
357 | r = check_access(bus, m, c, &error); |
358 | if (r < 0) | |
359 | return bus_maybe_reply_error(m, r, &error); | |
360 | ||
f00c3121 | 361 | r = node_vtable_get_userdata(bus, m->path, c->parent, &u, &error); |
992c052c | 362 | if (r <= 0) |
f00c3121 | 363 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
364 | if (bus->nodes_modified) |
365 | return 0; | |
992c052c | 366 | |
09c8a7c6 | 367 | u = vtable_method_convert_userdata(c->vtable, u); |
368 | ||
992c052c LP |
369 | *found_object = true; |
370 | ||
68313d3d LP |
371 | if (c->last_iteration == bus->iteration_counter) |
372 | return 0; | |
373 | ||
374 | c->last_iteration = bus->iteration_counter; | |
375 | ||
992c052c LP |
376 | r = sd_bus_message_rewind(m, true); |
377 | if (r < 0) | |
378 | return r; | |
379 | ||
40ca29a1 LP |
380 | signature = sd_bus_message_get_signature(m, true); |
381 | if (!signature) | |
382 | return -EINVAL; | |
992c052c | 383 | |
f00c3121 | 384 | if (!streq(strempty(c->vtable->x.method.signature), signature)) |
86b8d289 LP |
385 | return sd_bus_reply_method_errorf( |
386 | m, | |
387 | SD_BUS_ERROR_INVALID_ARGS, | |
388 | "Invalid arguments '%s' to call %s.%s(), expecting '%s'.", | |
389 | signature, c->interface, c->member, strempty(c->vtable->x.method.signature)); | |
992c052c | 390 | |
6717d473 LP |
391 | /* Keep track what the signature of the reply to this message |
392 | * should be, so that this can be enforced when sealing the | |
393 | * reply. */ | |
394 | m->enforced_reply_signature = strempty(c->vtable->x.method.result); | |
395 | ||
ebcf1f97 | 396 | if (c->vtable->x.method.handler) { |
1b64f838 LP |
397 | sd_bus_slot *slot; |
398 | ||
399 | slot = container_of(c->parent, sd_bus_slot, node_vtable); | |
19befb2d | 400 | |
1b64f838 | 401 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
402 | bus->current_handler = c->vtable->x.method.handler; |
403 | bus->current_userdata = u; | |
19070062 | 404 | r = c->vtable->x.method.handler(m, u, &error); |
caa82984 LP |
405 | bus->current_userdata = NULL; |
406 | bus->current_handler = NULL; | |
1b64f838 | 407 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 408 | |
f00c3121 | 409 | return bus_maybe_reply_error(m, r, &error); |
ebcf1f97 | 410 | } |
992c052c LP |
411 | |
412 | /* If the method callback is NULL, make this a successful NOP */ | |
df2d202e | 413 | r = sd_bus_reply_method_return(m, NULL); |
992c052c LP |
414 | if (r < 0) |
415 | return r; | |
416 | ||
417 | return 1; | |
418 | } | |
419 | ||
420 | static int invoke_property_get( | |
421 | sd_bus *bus, | |
19befb2d | 422 | sd_bus_slot *slot, |
992c052c LP |
423 | const sd_bus_vtable *v, |
424 | const char *path, | |
425 | const char *interface, | |
426 | const char *property, | |
ebcf1f97 LP |
427 | sd_bus_message *reply, |
428 | void *userdata, | |
429 | sd_bus_error *error) { | |
992c052c | 430 | |
af8601fa | 431 | const void *p; |
f00c3121 | 432 | int r; |
992c052c LP |
433 | |
434 | assert(bus); | |
19befb2d | 435 | assert(slot); |
992c052c | 436 | assert(v); |
dfa92725 LP |
437 | assert(path); |
438 | assert(interface); | |
439 | assert(property); | |
ebcf1f97 | 440 | assert(reply); |
992c052c | 441 | |
f00c3121 | 442 | if (v->x.property.get) { |
19befb2d | 443 | |
1b64f838 | 444 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 445 | bus->current_userdata = userdata; |
f00c3121 | 446 | r = v->x.property.get(bus, path, interface, property, reply, userdata, error); |
caa82984 | 447 | bus->current_userdata = NULL; |
1b64f838 | 448 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 449 | |
f00c3121 LP |
450 | if (r < 0) |
451 | return r; | |
452 | if (sd_bus_error_is_set(error)) | |
5958d089 | 453 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
454 | return r; |
455 | } | |
992c052c LP |
456 | |
457 | /* Automatic handling if no callback is defined. */ | |
458 | ||
c13c7de3 | 459 | if (streq(v->x.property.signature, "as")) |
ebcf1f97 | 460 | return sd_bus_message_append_strv(reply, *(char***) userdata); |
c13c7de3 | 461 | |
77a874a3 LP |
462 | assert(signature_is_single(v->x.property.signature, false)); |
463 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 464 | |
77a874a3 | 465 | switch (v->x.property.signature[0]) { |
992c052c LP |
466 | |
467 | case SD_BUS_TYPE_STRING: | |
28d6633a LP |
468 | case SD_BUS_TYPE_SIGNATURE: |
469 | p = strempty(*(char**) userdata); | |
af8601fa KS |
470 | break; |
471 | ||
992c052c | 472 | case SD_BUS_TYPE_OBJECT_PATH: |
992c052c | 473 | p = *(char**) userdata; |
28d6633a | 474 | assert(p); |
992c052c LP |
475 | break; |
476 | ||
477 | default: | |
478 | p = userdata; | |
479 | break; | |
480 | } | |
481 | ||
ebcf1f97 | 482 | return sd_bus_message_append_basic(reply, v->x.property.signature[0], p); |
992c052c LP |
483 | } |
484 | ||
485 | static int invoke_property_set( | |
486 | sd_bus *bus, | |
19befb2d | 487 | sd_bus_slot *slot, |
992c052c LP |
488 | const sd_bus_vtable *v, |
489 | const char *path, | |
490 | const char *interface, | |
491 | const char *property, | |
492 | sd_bus_message *value, | |
ebcf1f97 LP |
493 | void *userdata, |
494 | sd_bus_error *error) { | |
992c052c LP |
495 | |
496 | int r; | |
497 | ||
498 | assert(bus); | |
19befb2d | 499 | assert(slot); |
992c052c | 500 | assert(v); |
dfa92725 LP |
501 | assert(path); |
502 | assert(interface); | |
503 | assert(property); | |
504 | assert(value); | |
992c052c | 505 | |
f00c3121 | 506 | if (v->x.property.set) { |
19befb2d | 507 | |
1b64f838 | 508 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 509 | bus->current_userdata = userdata; |
f00c3121 | 510 | r = v->x.property.set(bus, path, interface, property, value, userdata, error); |
caa82984 | 511 | bus->current_userdata = NULL; |
1b64f838 | 512 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 513 | |
f00c3121 LP |
514 | if (r < 0) |
515 | return r; | |
516 | if (sd_bus_error_is_set(error)) | |
5958d089 | 517 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
518 | return r; |
519 | } | |
992c052c LP |
520 | |
521 | /* Automatic handling if no callback is defined. */ | |
522 | ||
77a874a3 LP |
523 | assert(signature_is_single(v->x.property.signature, false)); |
524 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 525 | |
77a874a3 | 526 | switch (v->x.property.signature[0]) { |
992c052c LP |
527 | |
528 | case SD_BUS_TYPE_STRING: | |
529 | case SD_BUS_TYPE_OBJECT_PATH: | |
530 | case SD_BUS_TYPE_SIGNATURE: { | |
531 | const char *p; | |
532 | char *n; | |
533 | ||
77a874a3 | 534 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], &p); |
992c052c LP |
535 | if (r < 0) |
536 | return r; | |
537 | ||
538 | n = strdup(p); | |
539 | if (!n) | |
540 | return -ENOMEM; | |
541 | ||
542 | free(*(char**) userdata); | |
543 | *(char**) userdata = n; | |
544 | ||
545 | break; | |
546 | } | |
547 | ||
548 | default: | |
77a874a3 | 549 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], userdata); |
992c052c LP |
550 | if (r < 0) |
551 | return r; | |
552 | ||
553 | break; | |
554 | } | |
555 | ||
556 | return 1; | |
557 | } | |
558 | ||
559 | static int property_get_set_callbacks_run( | |
560 | sd_bus *bus, | |
561 | sd_bus_message *m, | |
562 | struct vtable_member *c, | |
563 | bool require_fallback, | |
564 | bool is_get, | |
565 | bool *found_object) { | |
566 | ||
4afd3348 LP |
567 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
568 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
19befb2d | 569 | sd_bus_slot *slot; |
c94d7fc3 | 570 | void *u = NULL; |
992c052c LP |
571 | int r; |
572 | ||
573 | assert(bus); | |
574 | assert(m); | |
dfa92725 | 575 | assert(c); |
992c052c LP |
576 | assert(found_object); |
577 | ||
578 | if (require_fallback && !c->parent->is_fallback) | |
579 | return 0; | |
580 | ||
f00c3121 | 581 | r = vtable_property_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 582 | if (r <= 0) |
f00c3121 | 583 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
584 | if (bus->nodes_modified) |
585 | return 0; | |
992c052c | 586 | |
19befb2d LP |
587 | slot = container_of(c->parent, sd_bus_slot, node_vtable); |
588 | ||
992c052c LP |
589 | *found_object = true; |
590 | ||
df2d202e | 591 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
592 | if (r < 0) |
593 | return r; | |
594 | ||
992c052c | 595 | if (is_get) { |
68313d3d LP |
596 | /* Note that we do not protect against reexecution |
597 | * here (using the last_iteration check, see below), | |
598 | * should the node tree have changed and we got called | |
599 | * again. We assume that property Get() calls are | |
600 | * ultimately without side-effects or if they aren't | |
601 | * then at least idempotent. */ | |
602 | ||
77a874a3 | 603 | r = sd_bus_message_open_container(reply, 'v', c->vtable->x.property.signature); |
992c052c LP |
604 | if (r < 0) |
605 | return r; | |
606 | ||
adacb957 LP |
607 | /* Note that we do not do an access check here. Read |
608 | * access to properties is always unrestricted, since | |
609 | * PropertiesChanged signals broadcast contents | |
610 | * anyway. */ | |
611 | ||
19befb2d | 612 | r = invoke_property_get(bus, slot, c->vtable, m->path, c->interface, c->member, reply, u, &error); |
992c052c | 613 | if (r < 0) |
f00c3121 | 614 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 615 | |
68313d3d LP |
616 | if (bus->nodes_modified) |
617 | return 0; | |
618 | ||
992c052c LP |
619 | r = sd_bus_message_close_container(reply); |
620 | if (r < 0) | |
621 | return r; | |
622 | ||
623 | } else { | |
0ca454d4 LP |
624 | const char *signature = NULL; |
625 | char type = 0; | |
626 | ||
992c052c | 627 | if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) |
ebcf1f97 | 628 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Property '%s' is not writable.", c->member); |
68313d3d | 629 | |
ebcf1f97 LP |
630 | /* Avoid that we call the set routine more than once |
631 | * if the processing of this message got restarted | |
632 | * because the node tree changed. */ | |
633 | if (c->last_iteration == bus->iteration_counter) | |
634 | return 0; | |
992c052c | 635 | |
ebcf1f97 | 636 | c->last_iteration = bus->iteration_counter; |
992c052c | 637 | |
0ca454d4 LP |
638 | r = sd_bus_message_peek_type(m, &type, &signature); |
639 | if (r < 0) | |
640 | return r; | |
641 | ||
642 | if (type != 'v' || !streq(strempty(signature), strempty(c->vtable->x.property.signature))) | |
643 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Incorrect parameters for property '%s', expected '%s', got '%s'.", c->member, strempty(c->vtable->x.property.signature), strempty(signature)); | |
644 | ||
ebcf1f97 LP |
645 | r = sd_bus_message_enter_container(m, 'v', c->vtable->x.property.signature); |
646 | if (r < 0) | |
647 | return r; | |
992c052c | 648 | |
adacb957 LP |
649 | r = check_access(bus, m, c, &error); |
650 | if (r < 0) | |
651 | return bus_maybe_reply_error(m, r, &error); | |
652 | ||
19befb2d | 653 | r = invoke_property_set(bus, slot, c->vtable, m->path, c->interface, c->member, m, u, &error); |
ebcf1f97 | 654 | if (r < 0) |
f00c3121 | 655 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 656 | |
68313d3d LP |
657 | if (bus->nodes_modified) |
658 | return 0; | |
659 | ||
992c052c LP |
660 | r = sd_bus_message_exit_container(m); |
661 | if (r < 0) | |
662 | return r; | |
663 | } | |
664 | ||
665 | r = sd_bus_send(bus, reply, NULL); | |
666 | if (r < 0) | |
667 | return r; | |
668 | ||
669 | return 1; | |
670 | } | |
671 | ||
a03e4337 LP |
672 | static int vtable_append_one_property( |
673 | sd_bus *bus, | |
674 | sd_bus_message *reply, | |
675 | const char *path, | |
676 | struct node_vtable *c, | |
677 | const sd_bus_vtable *v, | |
678 | void *userdata, | |
679 | sd_bus_error *error) { | |
680 | ||
19befb2d | 681 | sd_bus_slot *slot; |
a03e4337 LP |
682 | int r; |
683 | ||
684 | assert(bus); | |
685 | assert(reply); | |
686 | assert(path); | |
687 | assert(c); | |
688 | assert(v); | |
689 | ||
690 | r = sd_bus_message_open_container(reply, 'e', "sv"); | |
691 | if (r < 0) | |
692 | return r; | |
693 | ||
694 | r = sd_bus_message_append(reply, "s", v->x.property.member); | |
695 | if (r < 0) | |
696 | return r; | |
697 | ||
698 | r = sd_bus_message_open_container(reply, 'v', v->x.property.signature); | |
699 | if (r < 0) | |
700 | return r; | |
701 | ||
19befb2d LP |
702 | slot = container_of(c, sd_bus_slot, node_vtable); |
703 | ||
704 | r = invoke_property_get(bus, slot, v, path, c->interface, v->x.property.member, reply, vtable_property_convert_userdata(v, userdata), error); | |
a03e4337 LP |
705 | if (r < 0) |
706 | return r; | |
707 | if (bus->nodes_modified) | |
708 | return 0; | |
709 | ||
710 | r = sd_bus_message_close_container(reply); | |
711 | if (r < 0) | |
712 | return r; | |
713 | ||
714 | r = sd_bus_message_close_container(reply); | |
715 | if (r < 0) | |
716 | return r; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
992c052c LP |
721 | static int vtable_append_all_properties( |
722 | sd_bus *bus, | |
723 | sd_bus_message *reply, | |
724 | const char *path, | |
725 | struct node_vtable *c, | |
726 | void *userdata, | |
727 | sd_bus_error *error) { | |
728 | ||
729 | const sd_bus_vtable *v; | |
730 | int r; | |
731 | ||
732 | assert(bus); | |
733 | assert(reply); | |
dfa92725 | 734 | assert(path); |
992c052c LP |
735 | assert(c); |
736 | ||
6e8df5f0 LP |
737 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
738 | return 1; | |
739 | ||
992c052c | 740 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
945c2931 | 741 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
992c052c LP |
742 | continue; |
743 | ||
6e8df5f0 LP |
744 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
745 | continue; | |
746 | ||
33702051 LP |
747 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT) |
748 | continue; | |
749 | ||
a03e4337 | 750 | r = vtable_append_one_property(bus, reply, path, c, v, userdata, error); |
f00c3121 LP |
751 | if (r < 0) |
752 | return r; | |
68313d3d LP |
753 | if (bus->nodes_modified) |
754 | return 0; | |
992c052c LP |
755 | } |
756 | ||
757 | return 1; | |
758 | } | |
759 | ||
760 | static int property_get_all_callbacks_run( | |
761 | sd_bus *bus, | |
762 | sd_bus_message *m, | |
763 | struct node_vtable *first, | |
764 | bool require_fallback, | |
765 | const char *iface, | |
766 | bool *found_object) { | |
767 | ||
4afd3348 | 768 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
992c052c | 769 | struct node_vtable *c; |
bd037038 | 770 | bool found_interface; |
992c052c LP |
771 | int r; |
772 | ||
773 | assert(bus); | |
774 | assert(m); | |
775 | assert(found_object); | |
776 | ||
df2d202e | 777 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
778 | if (r < 0) |
779 | return r; | |
780 | ||
781 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
782 | if (r < 0) | |
783 | return r; | |
784 | ||
38911893 | 785 | found_interface = !iface || |
bd037038 LP |
786 | streq(iface, "org.freedesktop.DBus.Properties") || |
787 | streq(iface, "org.freedesktop.DBus.Peer") || | |
788 | streq(iface, "org.freedesktop.DBus.Introspectable"); | |
789 | ||
992c052c | 790 | LIST_FOREACH(vtables, c, first) { |
4afd3348 | 791 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
792 | void *u; |
793 | ||
794 | if (require_fallback && !c->is_fallback) | |
795 | continue; | |
796 | ||
f00c3121 | 797 | r = node_vtable_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 798 | if (r < 0) |
f00c3121 | 799 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
800 | if (bus->nodes_modified) |
801 | return 0; | |
992c052c LP |
802 | if (r == 0) |
803 | continue; | |
804 | ||
805 | *found_object = true; | |
806 | ||
807 | if (iface && !streq(c->interface, iface)) | |
808 | continue; | |
809 | found_interface = true; | |
810 | ||
992c052c LP |
811 | r = vtable_append_all_properties(bus, reply, m->path, c, u, &error); |
812 | if (r < 0) | |
f00c3121 | 813 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
814 | if (bus->nodes_modified) |
815 | return 0; | |
992c052c LP |
816 | } |
817 | ||
733e792b AJ |
818 | if (!*found_object) |
819 | return 0; | |
820 | ||
992c052c LP |
821 | if (!found_interface) { |
822 | r = sd_bus_reply_method_errorf( | |
df2d202e | 823 | m, |
40ca29a1 | 824 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
825 | "Unknown interface '%s'.", iface); |
826 | if (r < 0) | |
827 | return r; | |
828 | ||
829 | return 1; | |
830 | } | |
831 | ||
832 | r = sd_bus_message_close_container(reply); | |
833 | if (r < 0) | |
834 | return r; | |
835 | ||
836 | r = sd_bus_send(bus, reply, NULL); | |
837 | if (r < 0) | |
838 | return r; | |
839 | ||
840 | return 1; | |
841 | } | |
842 | ||
ff02f101 | 843 | static int bus_node_exists( |
dfa92725 LP |
844 | sd_bus *bus, |
845 | struct node *n, | |
846 | const char *path, | |
847 | bool require_fallback) { | |
848 | ||
992c052c LP |
849 | struct node_vtable *c; |
850 | struct node_callback *k; | |
ff02f101 | 851 | int r; |
992c052c LP |
852 | |
853 | assert(bus); | |
854 | assert(n); | |
dfa92725 | 855 | assert(path); |
992c052c LP |
856 | |
857 | /* Tests if there's anything attached directly to this node | |
858 | * for the specified path */ | |
859 | ||
ff02f101 DH |
860 | if (!require_fallback && (n->enumerators || n->object_managers)) |
861 | return true; | |
862 | ||
992c052c LP |
863 | LIST_FOREACH(callbacks, k, n->callbacks) { |
864 | if (require_fallback && !k->is_fallback) | |
865 | continue; | |
866 | ||
ff02f101 | 867 | return 1; |
992c052c LP |
868 | } |
869 | ||
870 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 871 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
872 | |
873 | if (require_fallback && !c->is_fallback) | |
874 | continue; | |
875 | ||
ff02f101 DH |
876 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
877 | if (r != 0) | |
878 | return r; | |
68313d3d | 879 | if (bus->nodes_modified) |
ff02f101 | 880 | return 0; |
992c052c LP |
881 | } |
882 | ||
ff02f101 | 883 | return 0; |
992c052c LP |
884 | } |
885 | ||
886 | static int process_introspect( | |
887 | sd_bus *bus, | |
888 | sd_bus_message *m, | |
889 | struct node *n, | |
890 | bool require_fallback, | |
891 | bool *found_object) { | |
892 | ||
4afd3348 LP |
893 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
894 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 895 | _cleanup_set_free_free_ Set *s = NULL; |
718db961 | 896 | const char *previous_interface = NULL; |
992c052c LP |
897 | struct introspect intro; |
898 | struct node_vtable *c; | |
899 | bool empty; | |
900 | int r; | |
901 | ||
902 | assert(bus); | |
903 | assert(m); | |
904 | assert(n); | |
905 | assert(found_object); | |
906 | ||
44eb1add | 907 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 908 | if (r < 0) |
f00c3121 | 909 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
910 | if (bus->nodes_modified) |
911 | return 0; | |
992c052c | 912 | |
7fb411f0 | 913 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
914 | if (r < 0) |
915 | return r; | |
916 | ||
943c3f94 | 917 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
918 | if (r < 0) |
919 | return r; | |
920 | ||
921 | empty = set_isempty(s); | |
922 | ||
923 | LIST_FOREACH(vtables, c, n->vtables) { | |
924 | if (require_fallback && !c->is_fallback) | |
925 | continue; | |
926 | ||
f00c3121 LP |
927 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
928 | if (r < 0) { | |
929 | r = bus_maybe_reply_error(m, r, &error); | |
930 | goto finish; | |
931 | } | |
932 | if (bus->nodes_modified) { | |
933 | r = 0; | |
934 | goto finish; | |
935 | } | |
992c052c LP |
936 | if (r == 0) |
937 | continue; | |
938 | ||
939 | empty = false; | |
940 | ||
6e8df5f0 LP |
941 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
942 | continue; | |
943 | ||
718db961 LP |
944 | if (!streq_ptr(previous_interface, c->interface)) { |
945 | ||
946 | if (previous_interface) | |
0d536673 | 947 | fputs(" </interface>\n", intro.f); |
718db961 LP |
948 | |
949 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
950 | } | |
951 | ||
952 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
953 | if (r < 0) |
954 | goto finish; | |
718db961 LP |
955 | |
956 | previous_interface = c->interface; | |
992c052c LP |
957 | } |
958 | ||
718db961 | 959 | if (previous_interface) |
0d536673 | 960 | fputs(" </interface>\n", intro.f); |
718db961 | 961 | |
992c052c LP |
962 | if (empty) { |
963 | /* Nothing?, let's see if we exist at all, and if not | |
964 | * refuse to do anything */ | |
965 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
f2bfc6ba LP |
966 | if (r <= 0) { |
967 | r = bus_maybe_reply_error(m, r, &error); | |
ff02f101 | 968 | goto finish; |
f2bfc6ba | 969 | } |
ff02f101 DH |
970 | if (bus->nodes_modified) { |
971 | r = 0; | |
992c052c | 972 | goto finish; |
ff02f101 | 973 | } |
992c052c LP |
974 | } |
975 | ||
976 | *found_object = true; | |
977 | ||
978 | r = introspect_write_child_nodes(&intro, s, m->path); | |
979 | if (r < 0) | |
980 | goto finish; | |
981 | ||
982 | r = introspect_finish(&intro, bus, m, &reply); | |
983 | if (r < 0) | |
984 | goto finish; | |
985 | ||
986 | r = sd_bus_send(bus, reply, NULL); | |
987 | if (r < 0) | |
988 | goto finish; | |
989 | ||
990 | r = 1; | |
991 | ||
992 | finish: | |
993 | introspect_free(&intro); | |
994 | return r; | |
995 | } | |
996 | ||
992c052c LP |
997 | static int object_manager_serialize_path( |
998 | sd_bus *bus, | |
999 | sd_bus_message *reply, | |
1000 | const char *prefix, | |
1001 | const char *path, | |
1002 | bool require_fallback, | |
1003 | sd_bus_error *error) { | |
1004 | ||
718db961 LP |
1005 | const char *previous_interface = NULL; |
1006 | bool found_something = false; | |
992c052c LP |
1007 | struct node_vtable *i; |
1008 | struct node *n; | |
1009 | int r; | |
1010 | ||
1011 | assert(bus); | |
1012 | assert(reply); | |
1013 | assert(prefix); | |
1014 | assert(path); | |
1015 | assert(error); | |
1016 | ||
1017 | n = hashmap_get(bus->nodes, prefix); | |
1018 | if (!n) | |
1019 | return 0; | |
1020 | ||
992c052c | 1021 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1022 | void *u; |
992c052c LP |
1023 | |
1024 | if (require_fallback && !i->is_fallback) | |
1025 | continue; | |
1026 | ||
f00c3121 | 1027 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1028 | if (r < 0) |
1029 | return r; | |
68313d3d LP |
1030 | if (bus->nodes_modified) |
1031 | return 0; | |
92db139e LP |
1032 | if (r == 0) |
1033 | continue; | |
1034 | ||
1035 | if (!found_something) { | |
718db961 LP |
1036 | |
1037 | /* Open the object part */ | |
1038 | ||
92db139e LP |
1039 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1040 | if (r < 0) | |
1041 | return r; | |
1042 | ||
1043 | r = sd_bus_message_append(reply, "o", path); | |
1044 | if (r < 0) | |
1045 | return r; | |
1046 | ||
1047 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1048 | if (r < 0) | |
1049 | return r; | |
1050 | ||
c0e7906d DH |
1051 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); |
1052 | if (r < 0) | |
1053 | return r; | |
1054 | ||
1055 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
1056 | if (r < 0) | |
1057 | return r; | |
1058 | ||
1059 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
1060 | if (r < 0) | |
1061 | return r; | |
1062 | ||
1063 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
1064 | if (r < 0) | |
1065 | return r; | |
1066 | ||
92db139e LP |
1067 | found_something = true; |
1068 | } | |
1069 | ||
718db961 LP |
1070 | if (!streq_ptr(previous_interface, i->interface)) { |
1071 | ||
1072 | /* Maybe close the previous interface part */ | |
1073 | ||
1074 | if (previous_interface) { | |
1075 | r = sd_bus_message_close_container(reply); | |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | r = sd_bus_message_close_container(reply); | |
1080 | if (r < 0) | |
1081 | return r; | |
1082 | } | |
1083 | ||
1084 | /* Open the new interface part */ | |
1085 | ||
1086 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1087 | if (r < 0) | |
1088 | return r; | |
1089 | ||
1090 | r = sd_bus_message_append(reply, "s", i->interface); | |
1091 | if (r < 0) | |
1092 | return r; | |
1093 | ||
1094 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1095 | if (r < 0) | |
1096 | return r; | |
1097 | } | |
1098 | ||
1099 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1100 | if (r < 0) |
1101 | return r; | |
68313d3d LP |
1102 | if (bus->nodes_modified) |
1103 | return 0; | |
718db961 LP |
1104 | |
1105 | previous_interface = i->interface; | |
1106 | } | |
1107 | ||
1108 | if (previous_interface) { | |
1109 | r = sd_bus_message_close_container(reply); | |
1110 | if (r < 0) | |
1111 | return r; | |
1112 | ||
1113 | r = sd_bus_message_close_container(reply); | |
1114 | if (r < 0) | |
1115 | return r; | |
992c052c LP |
1116 | } |
1117 | ||
92db139e LP |
1118 | if (found_something) { |
1119 | r = sd_bus_message_close_container(reply); | |
1120 | if (r < 0) | |
1121 | return r; | |
992c052c | 1122 | |
92db139e LP |
1123 | r = sd_bus_message_close_container(reply); |
1124 | if (r < 0) | |
1125 | return r; | |
1126 | } | |
992c052c LP |
1127 | |
1128 | return 1; | |
1129 | } | |
1130 | ||
1131 | static int object_manager_serialize_path_and_fallbacks( | |
1132 | sd_bus *bus, | |
1133 | sd_bus_message *reply, | |
1134 | const char *path, | |
1135 | sd_bus_error *error) { | |
1136 | ||
92e189e5 | 1137 | char *prefix; |
992c052c LP |
1138 | int r; |
1139 | ||
1140 | assert(bus); | |
1141 | assert(reply); | |
1142 | assert(path); | |
1143 | assert(error); | |
1144 | ||
1145 | /* First, add all vtables registered for this path */ | |
1146 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1147 | if (r < 0) | |
1148 | return r; | |
68313d3d LP |
1149 | if (bus->nodes_modified) |
1150 | return 0; | |
992c052c LP |
1151 | |
1152 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1153 | prefix = alloca(strlen(path) + 1); |
1154 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1155 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1156 | if (r < 0) | |
1157 | return r; | |
68313d3d LP |
1158 | if (bus->nodes_modified) |
1159 | return 0; | |
992c052c LP |
1160 | } |
1161 | ||
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | static int process_get_managed_objects( | |
1166 | sd_bus *bus, | |
1167 | sd_bus_message *m, | |
1168 | struct node *n, | |
1169 | bool require_fallback, | |
1170 | bool *found_object) { | |
1171 | ||
4afd3348 LP |
1172 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1173 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 1174 | _cleanup_set_free_free_ Set *s = NULL; |
943c3f94 DH |
1175 | Iterator i; |
1176 | char *path; | |
992c052c LP |
1177 | int r; |
1178 | ||
1179 | assert(bus); | |
1180 | assert(m); | |
1181 | assert(n); | |
1182 | assert(found_object); | |
1183 | ||
943c3f94 DH |
1184 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1185 | * sub-tree. Therefore, we require a registered object-manager on | |
1186 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1187 | ||
1188 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1189 | return 0; |
1190 | ||
44eb1add | 1191 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c | 1192 | if (r < 0) |
f2bfc6ba | 1193 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
1194 | if (bus->nodes_modified) |
1195 | return 0; | |
992c052c | 1196 | |
df2d202e | 1197 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1198 | if (r < 0) |
1199 | return r; | |
1200 | ||
1201 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1202 | if (r < 0) | |
1203 | return r; | |
1204 | ||
943c3f94 DH |
1205 | SET_FOREACH(path, s, i) { |
1206 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1207 | if (r < 0) | |
f2bfc6ba | 1208 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 1209 | |
943c3f94 | 1210 | if (bus->nodes_modified) |
992c052c | 1211 | return 0; |
992c052c LP |
1212 | } |
1213 | ||
1214 | r = sd_bus_message_close_container(reply); | |
1215 | if (r < 0) | |
1216 | return r; | |
1217 | ||
1218 | r = sd_bus_send(bus, reply, NULL); | |
1219 | if (r < 0) | |
1220 | return r; | |
1221 | ||
1222 | return 1; | |
1223 | } | |
1224 | ||
1225 | static int object_find_and_run( | |
1226 | sd_bus *bus, | |
1227 | sd_bus_message *m, | |
1228 | const char *p, | |
1229 | bool require_fallback, | |
1230 | bool *found_object) { | |
1231 | ||
1232 | struct node *n; | |
1233 | struct vtable_member vtable_key, *v; | |
1234 | int r; | |
1235 | ||
1236 | assert(bus); | |
1237 | assert(m); | |
1238 | assert(p); | |
1239 | assert(found_object); | |
1240 | ||
1241 | n = hashmap_get(bus->nodes, p); | |
1242 | if (!n) | |
1243 | return 0; | |
1244 | ||
1245 | /* First, try object callbacks */ | |
1246 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1247 | if (r != 0) | |
1248 | return r; | |
68313d3d LP |
1249 | if (bus->nodes_modified) |
1250 | return 0; | |
992c052c LP |
1251 | |
1252 | if (!m->interface || !m->member) | |
1253 | return 0; | |
1254 | ||
1255 | /* Then, look for a known method */ | |
1256 | vtable_key.path = (char*) p; | |
1257 | vtable_key.interface = m->interface; | |
1258 | vtable_key.member = m->member; | |
1259 | ||
1260 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1261 | if (v) { | |
1262 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1263 | if (r != 0) | |
1264 | return r; | |
68313d3d LP |
1265 | if (bus->nodes_modified) |
1266 | return 0; | |
992c052c LP |
1267 | } |
1268 | ||
1269 | /* Then, look for a known property */ | |
1270 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1271 | bool get = false; | |
1272 | ||
1273 | get = streq(m->member, "Get"); | |
1274 | ||
1275 | if (get || streq(m->member, "Set")) { | |
1276 | ||
1277 | r = sd_bus_message_rewind(m, true); | |
1278 | if (r < 0) | |
1279 | return r; | |
1280 | ||
1281 | vtable_key.path = (char*) p; | |
1282 | ||
1283 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1284 | if (r < 0) | |
0fc5ab90 | 1285 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1286 | |
1287 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1288 | if (v) { | |
1289 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1290 | if (r != 0) | |
1291 | return r; | |
1292 | } | |
1293 | ||
1294 | } else if (streq(m->member, "GetAll")) { | |
1295 | const char *iface; | |
1296 | ||
1297 | r = sd_bus_message_rewind(m, true); | |
1298 | if (r < 0) | |
1299 | return r; | |
1300 | ||
1301 | r = sd_bus_message_read(m, "s", &iface); | |
1302 | if (r < 0) | |
0fc5ab90 | 1303 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1304 | |
1305 | if (iface[0] == 0) | |
1306 | iface = NULL; | |
1307 | ||
1308 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1309 | if (r != 0) | |
1310 | return r; | |
1311 | } | |
1312 | ||
1313 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1314 | ||
0fc5ab90 LP |
1315 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1316 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1317 | ||
992c052c LP |
1318 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1319 | if (r != 0) | |
1320 | return r; | |
1321 | ||
1322 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1323 | ||
0fc5ab90 LP |
1324 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1325 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1326 | ||
992c052c LP |
1327 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1328 | if (r != 0) | |
1329 | return r; | |
1330 | } | |
1331 | ||
68313d3d LP |
1332 | if (bus->nodes_modified) |
1333 | return 0; | |
1334 | ||
992c052c LP |
1335 | if (!*found_object) { |
1336 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1337 | if (r < 0) | |
f2bfc6ba | 1338 | return bus_maybe_reply_error(m, r, NULL); |
ff02f101 DH |
1339 | if (bus->nodes_modified) |
1340 | return 0; | |
992c052c LP |
1341 | if (r > 0) |
1342 | *found_object = true; | |
1343 | } | |
1344 | ||
1345 | return 0; | |
1346 | } | |
1347 | ||
1348 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1349 | int r; | |
1350 | size_t pl; | |
1351 | bool found_object = false; | |
1352 | ||
1353 | assert(bus); | |
1354 | assert(m); | |
1355 | ||
c7db1984 | 1356 | if (bus->is_monitor) |
09365592 LP |
1357 | return 0; |
1358 | ||
40ca29a1 | 1359 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1360 | return 0; |
1361 | ||
992c052c LP |
1362 | if (hashmap_isempty(bus->nodes)) |
1363 | return 0; | |
1364 | ||
f820cf99 LP |
1365 | /* Never respond to broadcast messages */ |
1366 | if (bus->bus_client && !m->destination) | |
1367 | return 0; | |
1368 | ||
adacb957 LP |
1369 | assert(m->path); |
1370 | assert(m->member); | |
1371 | ||
992c052c LP |
1372 | pl = strlen(m->path); |
1373 | do { | |
92e189e5 | 1374 | char prefix[pl+1]; |
992c052c LP |
1375 | |
1376 | bus->nodes_modified = false; | |
1377 | ||
1378 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1379 | if (r != 0) | |
1380 | return r; | |
1381 | ||
1382 | /* Look for fallback prefixes */ | |
92e189e5 | 1383 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1384 | |
1385 | if (bus->nodes_modified) | |
1386 | break; | |
1387 | ||
92e189e5 | 1388 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1389 | if (r != 0) |
1390 | return r; | |
1391 | } | |
1392 | ||
1393 | } while (bus->nodes_modified); | |
1394 | ||
1395 | if (!found_object) | |
1396 | return 0; | |
1397 | ||
1398 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1399 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1400 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1401 | m, |
40ca29a1 | 1402 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1403 | "Unknown property or interface."); |
1404 | else | |
1405 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1406 | m, |
40ca29a1 | 1407 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1408 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1409 | ||
1410 | if (r < 0) | |
1411 | return r; | |
1412 | ||
1413 | return 1; | |
1414 | } | |
1415 | ||
1416 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1417 | struct node *n, *parent; | |
1418 | const char *e; | |
2fd069b1 ZJS |
1419 | _cleanup_free_ char *s = NULL; |
1420 | char *p; | |
992c052c LP |
1421 | int r; |
1422 | ||
1423 | assert(bus); | |
1424 | assert(path); | |
1425 | assert(path[0] == '/'); | |
1426 | ||
1427 | n = hashmap_get(bus->nodes, path); | |
1428 | if (n) | |
1429 | return n; | |
1430 | ||
d5099efc | 1431 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1432 | if (r < 0) |
1433 | return NULL; | |
1434 | ||
1435 | s = strdup(path); | |
1436 | if (!s) | |
1437 | return NULL; | |
1438 | ||
1439 | if (streq(path, "/")) | |
1440 | parent = NULL; | |
1441 | else { | |
1442 | e = strrchr(path, '/'); | |
1443 | assert(e); | |
1444 | ||
7d67077f | 1445 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1446 | |
1447 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1448 | if (!parent) |
992c052c | 1449 | return NULL; |
992c052c LP |
1450 | } |
1451 | ||
1452 | n = new0(struct node, 1); | |
1453 | if (!n) | |
1454 | return NULL; | |
1455 | ||
1456 | n->parent = parent; | |
ae2a15bc | 1457 | n->path = TAKE_PTR(s); |
992c052c | 1458 | |
8e050193 | 1459 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1460 | if (r < 0) { |
2fd069b1 | 1461 | free(n->path); |
5fecf46d | 1462 | return mfree(n); |
992c052c LP |
1463 | } |
1464 | ||
1465 | if (parent) | |
71fda00f | 1466 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1467 | |
1468 | return n; | |
1469 | } | |
1470 | ||
19befb2d | 1471 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1472 | assert(b); |
1473 | ||
1474 | if (!n) | |
1475 | return; | |
1476 | ||
1477 | if (n->child || | |
1478 | n->callbacks || | |
1479 | n->vtables || | |
1480 | n->enumerators || | |
19befb2d | 1481 | n->object_managers) |
992c052c LP |
1482 | return; |
1483 | ||
85e55d14 | 1484 | assert_se(hashmap_remove(b->nodes, n->path) == n); |
992c052c LP |
1485 | |
1486 | if (n->parent) | |
71fda00f | 1487 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1488 | |
1489 | free(n->path); | |
1490 | bus_node_gc(b, n->parent); | |
1491 | free(n); | |
1492 | } | |
1493 | ||
2d5c8a27 DH |
1494 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1495 | struct node *n; | |
1496 | ||
1497 | assert(bus); | |
1498 | assert(path); | |
1499 | ||
1500 | n = hashmap_get(bus->nodes, path); | |
1501 | if (!n) { | |
1502 | char *prefix; | |
1503 | ||
1504 | prefix = alloca(strlen(path) + 1); | |
1505 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1506 | n = hashmap_get(bus->nodes, prefix); | |
1507 | if (n) | |
1508 | break; | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | while (n && !n->object_managers) | |
1513 | n = n->parent; | |
1514 | ||
1515 | if (out) | |
1516 | *out = n; | |
1517 | return !!n; | |
1518 | } | |
1519 | ||
992c052c | 1520 | static int bus_add_object( |
dfa92725 | 1521 | sd_bus *bus, |
19befb2d | 1522 | sd_bus_slot **slot, |
992c052c LP |
1523 | bool fallback, |
1524 | const char *path, | |
1525 | sd_bus_message_handler_t callback, | |
1526 | void *userdata) { | |
1527 | ||
19befb2d | 1528 | sd_bus_slot *s; |
992c052c LP |
1529 | struct node *n; |
1530 | int r; | |
1531 | ||
dfa92725 | 1532 | assert_return(bus, -EINVAL); |
45b1f410 | 1533 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1534 | assert_return(object_path_is_valid(path), -EINVAL); |
1535 | assert_return(callback, -EINVAL); | |
1536 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1537 | |
dfa92725 | 1538 | n = bus_node_allocate(bus, path); |
992c052c LP |
1539 | if (!n) |
1540 | return -ENOMEM; | |
1541 | ||
19befb2d LP |
1542 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1543 | if (!s) { | |
992c052c LP |
1544 | r = -ENOMEM; |
1545 | goto fail; | |
1546 | } | |
1547 | ||
19befb2d LP |
1548 | s->node_callback.callback = callback; |
1549 | s->node_callback.is_fallback = fallback; | |
992c052c | 1550 | |
19befb2d LP |
1551 | s->node_callback.node = n; |
1552 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1553 | bus->nodes_modified = true; |
1554 | ||
19befb2d LP |
1555 | if (slot) |
1556 | *slot = s; | |
1557 | ||
992c052c LP |
1558 | return 0; |
1559 | ||
1560 | fail: | |
19befb2d | 1561 | sd_bus_slot_unref(s); |
dfa92725 | 1562 | bus_node_gc(bus, n); |
19befb2d | 1563 | |
992c052c LP |
1564 | return r; |
1565 | } | |
1566 | ||
19befb2d | 1567 | _public_ int sd_bus_add_object( |
992c052c | 1568 | sd_bus *bus, |
19befb2d | 1569 | sd_bus_slot **slot, |
992c052c LP |
1570 | const char *path, |
1571 | sd_bus_message_handler_t callback, | |
1572 | void *userdata) { | |
1573 | ||
19befb2d | 1574 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1575 | } |
1576 | ||
19befb2d LP |
1577 | _public_ int sd_bus_add_fallback( |
1578 | sd_bus *bus, | |
1579 | sd_bus_slot **slot, | |
1580 | const char *prefix, | |
1581 | sd_bus_message_handler_t callback, | |
1582 | void *userdata) { | |
992c052c | 1583 | |
19befb2d | 1584 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1585 | } |
1586 | ||
b826ab58 | 1587 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1588 | const struct vtable_member *m = a; |
1589 | ||
dfa92725 LP |
1590 | assert(m); |
1591 | ||
b826ab58 TG |
1592 | string_hash_func(m->path, state); |
1593 | string_hash_func(m->interface, state); | |
1594 | string_hash_func(m->member, state); | |
992c052c LP |
1595 | } |
1596 | ||
1597 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1598 | const struct vtable_member *x = a, *y = b; | |
1599 | int r; | |
1600 | ||
dfa92725 LP |
1601 | assert(x); |
1602 | assert(y); | |
1603 | ||
992c052c LP |
1604 | r = strcmp(x->path, y->path); |
1605 | if (r != 0) | |
1606 | return r; | |
1607 | ||
1608 | r = strcmp(x->interface, y->interface); | |
1609 | if (r != 0) | |
1610 | return r; | |
1611 | ||
1612 | return strcmp(x->member, y->member); | |
1613 | } | |
1614 | ||
d5099efc MS |
1615 | static const struct hash_ops vtable_member_hash_ops = { |
1616 | .hash = vtable_member_hash_func, | |
1617 | .compare = vtable_member_compare_func | |
1618 | }; | |
1619 | ||
992c052c LP |
1620 | static int add_object_vtable_internal( |
1621 | sd_bus *bus, | |
19befb2d | 1622 | sd_bus_slot **slot, |
992c052c LP |
1623 | const char *path, |
1624 | const char *interface, | |
1625 | const sd_bus_vtable *vtable, | |
1626 | bool fallback, | |
1627 | sd_bus_object_find_t find, | |
1628 | void *userdata) { | |
1629 | ||
2915234d | 1630 | sd_bus_slot *s = NULL; |
19befb2d | 1631 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1632 | const sd_bus_vtable *v; |
1633 | struct node *n; | |
1634 | int r; | |
1635 | ||
dfa92725 | 1636 | assert_return(bus, -EINVAL); |
45b1f410 | 1637 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1638 | assert_return(object_path_is_valid(path), -EINVAL); |
1639 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1640 | assert_return(vtable, -EINVAL); | |
1641 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1642 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1643 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1644 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1645 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1646 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1647 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1648 | |
d5099efc | 1649 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1650 | if (r < 0) |
1651 | return r; | |
1652 | ||
d5099efc | 1653 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1654 | if (r < 0) |
1655 | return r; | |
1656 | ||
1657 | n = bus_node_allocate(bus, path); | |
1658 | if (!n) | |
1659 | return -ENOMEM; | |
1660 | ||
1661 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1662 | if (i->is_fallback != fallback) { |
1663 | r = -EPROTOTYPE; | |
1664 | goto fail; | |
1665 | } | |
718db961 LP |
1666 | |
1667 | if (streq(i->interface, interface)) { | |
1668 | ||
1669 | if (i->vtable == vtable) { | |
1670 | r = -EEXIST; | |
1671 | goto fail; | |
1672 | } | |
1673 | ||
1674 | existing = i; | |
1675 | } | |
992c052c LP |
1676 | } |
1677 | ||
19befb2d LP |
1678 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1679 | if (!s) { | |
992c052c LP |
1680 | r = -ENOMEM; |
1681 | goto fail; | |
1682 | } | |
1683 | ||
19befb2d LP |
1684 | s->node_vtable.is_fallback = fallback; |
1685 | s->node_vtable.vtable = vtable; | |
1686 | s->node_vtable.find = find; | |
992c052c | 1687 | |
19befb2d LP |
1688 | s->node_vtable.interface = strdup(interface); |
1689 | if (!s->node_vtable.interface) { | |
992c052c LP |
1690 | r = -ENOMEM; |
1691 | goto fail; | |
1692 | } | |
1693 | ||
19befb2d | 1694 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1695 | |
1696 | switch (v->type) { | |
1697 | ||
1698 | case _SD_BUS_VTABLE_METHOD: { | |
1699 | struct vtable_member *m; | |
1700 | ||
77a874a3 LP |
1701 | if (!member_name_is_valid(v->x.method.member) || |
1702 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1703 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1704 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1705 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1706 | r = -EINVAL; |
1707 | goto fail; | |
1708 | } | |
1709 | ||
1710 | m = new0(struct vtable_member, 1); | |
1711 | if (!m) { | |
1712 | r = -ENOMEM; | |
1713 | goto fail; | |
1714 | } | |
1715 | ||
19befb2d | 1716 | m->parent = &s->node_vtable; |
992c052c | 1717 | m->path = n->path; |
19befb2d | 1718 | m->interface = s->node_vtable.interface; |
77a874a3 | 1719 | m->member = v->x.method.member; |
992c052c LP |
1720 | m->vtable = v; |
1721 | ||
1722 | r = hashmap_put(bus->vtable_methods, m, m); | |
1723 | if (r < 0) { | |
1724 | free(m); | |
1725 | goto fail; | |
1726 | } | |
1727 | ||
1728 | break; | |
1729 | } | |
1730 | ||
1731 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1732 | ||
77a874a3 | 1733 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1734 | r = -EINVAL; |
1735 | goto fail; | |
1736 | } | |
9b772efb LP |
1737 | |
1738 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1739 | r = -EINVAL; | |
1740 | goto fail; | |
1741 | } | |
992c052c | 1742 | |
4831981d | 1743 | _fallthrough_; |
992c052c LP |
1744 | case _SD_BUS_VTABLE_PROPERTY: { |
1745 | struct vtable_member *m; | |
1746 | ||
77a874a3 LP |
1747 | if (!member_name_is_valid(v->x.property.member) || |
1748 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1749 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1750 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1751 | (!!(v->flags & SD_BUS_VTABLE_PROPERTY_CONST) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) > 1 || |
33702051 | 1752 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1753 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1754 | r = -EINVAL; |
1755 | goto fail; | |
1756 | } | |
1757 | ||
992c052c LP |
1758 | m = new0(struct vtable_member, 1); |
1759 | if (!m) { | |
1760 | r = -ENOMEM; | |
1761 | goto fail; | |
1762 | } | |
1763 | ||
19befb2d | 1764 | m->parent = &s->node_vtable; |
992c052c | 1765 | m->path = n->path; |
19befb2d | 1766 | m->interface = s->node_vtable.interface; |
77a874a3 | 1767 | m->member = v->x.property.member; |
992c052c LP |
1768 | m->vtable = v; |
1769 | ||
1770 | r = hashmap_put(bus->vtable_properties, m, m); | |
1771 | if (r < 0) { | |
1772 | free(m); | |
1773 | goto fail; | |
1774 | } | |
1775 | ||
1776 | break; | |
1777 | } | |
1778 | ||
1779 | case _SD_BUS_VTABLE_SIGNAL: | |
1780 | ||
77a874a3 | 1781 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1782 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1783 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1784 | r = -EINVAL; |
1785 | goto fail; | |
1786 | } | |
1787 | ||
1788 | break; | |
1789 | ||
1790 | default: | |
1791 | r = -EINVAL; | |
1792 | goto fail; | |
1793 | } | |
1794 | } | |
1795 | ||
19befb2d LP |
1796 | s->node_vtable.node = n; |
1797 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1798 | bus->nodes_modified = true; |
1799 | ||
19befb2d LP |
1800 | if (slot) |
1801 | *slot = s; | |
1802 | ||
992c052c LP |
1803 | return 0; |
1804 | ||
1805 | fail: | |
19befb2d | 1806 | sd_bus_slot_unref(s); |
dfa92725 LP |
1807 | bus_node_gc(bus, n); |
1808 | ||
19befb2d | 1809 | return r; |
992c052c LP |
1810 | } |
1811 | ||
d9f644e2 | 1812 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1813 | sd_bus *bus, |
19befb2d | 1814 | sd_bus_slot **slot, |
992c052c LP |
1815 | const char *path, |
1816 | const char *interface, | |
1817 | const sd_bus_vtable *vtable, | |
1818 | void *userdata) { | |
1819 | ||
19befb2d | 1820 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1821 | } |
1822 | ||
d9f644e2 | 1823 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1824 | sd_bus *bus, |
19befb2d LP |
1825 | sd_bus_slot **slot, |
1826 | const char *prefix, | |
718db961 LP |
1827 | const char *interface, |
1828 | const sd_bus_vtable *vtable, | |
1829 | sd_bus_object_find_t find, | |
1830 | void *userdata) { | |
992c052c | 1831 | |
19befb2d | 1832 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1833 | } |
1834 | ||
d9f644e2 | 1835 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1836 | sd_bus *bus, |
19befb2d | 1837 | sd_bus_slot **slot, |
992c052c LP |
1838 | const char *path, |
1839 | sd_bus_node_enumerator_t callback, | |
1840 | void *userdata) { | |
1841 | ||
19befb2d | 1842 | sd_bus_slot *s; |
992c052c LP |
1843 | struct node *n; |
1844 | int r; | |
1845 | ||
dfa92725 | 1846 | assert_return(bus, -EINVAL); |
45b1f410 | 1847 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1848 | assert_return(object_path_is_valid(path), -EINVAL); |
1849 | assert_return(callback, -EINVAL); | |
1850 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1851 | |
1852 | n = bus_node_allocate(bus, path); | |
1853 | if (!n) | |
1854 | return -ENOMEM; | |
1855 | ||
19befb2d LP |
1856 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1857 | if (!s) { | |
992c052c LP |
1858 | r = -ENOMEM; |
1859 | goto fail; | |
1860 | } | |
1861 | ||
19befb2d | 1862 | s->node_enumerator.callback = callback; |
68313d3d | 1863 | |
19befb2d LP |
1864 | s->node_enumerator.node = n; |
1865 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1866 | bus->nodes_modified = true; |
1867 | ||
19befb2d LP |
1868 | if (slot) |
1869 | *slot = s; | |
1870 | ||
992c052c LP |
1871 | return 0; |
1872 | ||
1873 | fail: | |
19befb2d | 1874 | sd_bus_slot_unref(s); |
992c052c LP |
1875 | bus_node_gc(bus, n); |
1876 | ||
19befb2d | 1877 | return r; |
992c052c LP |
1878 | } |
1879 | ||
1880 | static int emit_properties_changed_on_interface( | |
1881 | sd_bus *bus, | |
1882 | const char *prefix, | |
1883 | const char *path, | |
1884 | const char *interface, | |
1885 | bool require_fallback, | |
46525bfc | 1886 | bool *found_interface, |
992c052c LP |
1887 | char **names) { |
1888 | ||
4afd3348 LP |
1889 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1890 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
718db961 LP |
1891 | bool has_invalidating = false, has_changing = false; |
1892 | struct vtable_member key = {}; | |
992c052c LP |
1893 | struct node_vtable *c; |
1894 | struct node *n; | |
1895 | char **property; | |
1896 | void *u = NULL; | |
1897 | int r; | |
1898 | ||
1899 | assert(bus); | |
dfa92725 | 1900 | assert(prefix); |
992c052c LP |
1901 | assert(path); |
1902 | assert(interface); | |
46525bfc | 1903 | assert(found_interface); |
992c052c LP |
1904 | |
1905 | n = hashmap_get(bus->nodes, prefix); | |
1906 | if (!n) | |
1907 | return 0; | |
1908 | ||
151b9b96 | 1909 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1910 | if (r < 0) |
1911 | return r; | |
1912 | ||
1913 | r = sd_bus_message_append(m, "s", interface); | |
1914 | if (r < 0) | |
1915 | return r; | |
1916 | ||
1917 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1918 | if (r < 0) | |
1919 | return r; | |
1920 | ||
1921 | key.path = prefix; | |
1922 | key.interface = interface; | |
1923 | ||
718db961 LP |
1924 | LIST_FOREACH(vtables, c, n->vtables) { |
1925 | if (require_fallback && !c->is_fallback) | |
1926 | continue; | |
992c052c | 1927 | |
718db961 | 1928 | if (!streq(c->interface, interface)) |
992c052c | 1929 | continue; |
992c052c | 1930 | |
f00c3121 | 1931 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1932 | if (r < 0) |
1933 | return r; | |
718db961 LP |
1934 | if (bus->nodes_modified) |
1935 | return 0; | |
1936 | if (r == 0) | |
1937 | continue; | |
992c052c | 1938 | |
46525bfc LP |
1939 | *found_interface = true; |
1940 | ||
a03e4337 LP |
1941 | if (names) { |
1942 | /* If the caller specified a list of | |
1943 | * properties we include exactly those in the | |
1944 | * PropertiesChanged message */ | |
992c052c | 1945 | |
a03e4337 LP |
1946 | STRV_FOREACH(property, names) { |
1947 | struct vtable_member *v; | |
992c052c | 1948 | |
a03e4337 | 1949 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1950 | |
a03e4337 LP |
1951 | key.member = *property; |
1952 | v = hashmap_get(bus->vtable_properties, &key); | |
1953 | if (!v) | |
1954 | return -ENOENT; | |
1955 | ||
1956 | /* If there are two vtables for the same | |
1957 | * interface, let's handle this property when | |
1958 | * we come to that vtable. */ | |
1959 | if (c != v->parent) | |
1960 | continue; | |
992c052c | 1961 | |
a03e4337 LP |
1962 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1963 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1964 | |
a03e4337 LP |
1965 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1966 | ||
1967 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1968 | has_invalidating = true; | |
1969 | continue; | |
1970 | } | |
1971 | ||
1972 | has_changing = true; | |
1973 | ||
1974 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1975 | if (r < 0) | |
1976 | return r; | |
1977 | if (bus->nodes_modified) | |
1978 | return 0; | |
718db961 | 1979 | } |
a03e4337 LP |
1980 | } else { |
1981 | const sd_bus_vtable *v; | |
718db961 | 1982 | |
a03e4337 LP |
1983 | /* If the caller specified no properties list |
1984 | * we include all properties that are marked | |
1985 | * as changing in the message. */ | |
718db961 | 1986 | |
a03e4337 | 1987 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
945c2931 | 1988 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
a03e4337 | 1989 | continue; |
718db961 | 1990 | |
a03e4337 LP |
1991 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
1992 | continue; | |
718db961 | 1993 | |
a03e4337 LP |
1994 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
1995 | has_invalidating = true; | |
1996 | continue; | |
1997 | } | |
718db961 | 1998 | |
a03e4337 LP |
1999 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
2000 | continue; | |
718db961 | 2001 | |
a03e4337 | 2002 | has_changing = true; |
718db961 | 2003 | |
a03e4337 LP |
2004 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
2005 | if (r < 0) | |
2006 | return r; | |
2007 | if (bus->nodes_modified) | |
2008 | return 0; | |
2009 | } | |
718db961 | 2010 | } |
992c052c LP |
2011 | } |
2012 | ||
718db961 LP |
2013 | if (!has_invalidating && !has_changing) |
2014 | return 0; | |
2015 | ||
992c052c LP |
2016 | r = sd_bus_message_close_container(m); |
2017 | if (r < 0) | |
2018 | return r; | |
2019 | ||
2020 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2021 | if (r < 0) | |
2022 | return r; | |
2023 | ||
2024 | if (has_invalidating) { | |
718db961 LP |
2025 | LIST_FOREACH(vtables, c, n->vtables) { |
2026 | if (require_fallback && !c->is_fallback) | |
2027 | continue; | |
992c052c | 2028 | |
718db961 | 2029 | if (!streq(c->interface, interface)) |
992c052c LP |
2030 | continue; |
2031 | ||
f00c3121 | 2032 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2033 | if (r < 0) |
2034 | return r; | |
718db961 LP |
2035 | if (bus->nodes_modified) |
2036 | return 0; | |
2037 | if (r == 0) | |
2038 | continue; | |
2039 | ||
a03e4337 LP |
2040 | if (names) { |
2041 | STRV_FOREACH(property, names) { | |
2042 | struct vtable_member *v; | |
718db961 | 2043 | |
a03e4337 LP |
2044 | key.member = *property; |
2045 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2046 | assert(c == v->parent); | |
718db961 | 2047 | |
a03e4337 LP |
2048 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2049 | continue; | |
718db961 | 2050 | |
a03e4337 LP |
2051 | r = sd_bus_message_append(m, "s", *property); |
2052 | if (r < 0) | |
2053 | return r; | |
2054 | } | |
2055 | } else { | |
2056 | const sd_bus_vtable *v; | |
2057 | ||
2058 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
945c2931 | 2059 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
a03e4337 LP |
2060 | continue; |
2061 | ||
2062 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2063 | continue; | |
2064 | ||
2065 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2066 | continue; | |
2067 | ||
2068 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2069 | if (r < 0) | |
2070 | return r; | |
2071 | } | |
718db961 | 2072 | } |
992c052c LP |
2073 | } |
2074 | } | |
2075 | ||
2076 | r = sd_bus_message_close_container(m); | |
2077 | if (r < 0) | |
2078 | return r; | |
2079 | ||
2080 | r = sd_bus_send(bus, m, NULL); | |
2081 | if (r < 0) | |
2082 | return r; | |
2083 | ||
2084 | return 1; | |
2085 | } | |
2086 | ||
d9f644e2 | 2087 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2088 | sd_bus *bus, |
2089 | const char *path, | |
2090 | const char *interface, | |
2091 | char **names) { | |
2092 | ||
8ce2afd6 | 2093 | BUS_DONT_DESTROY(bus); |
46525bfc | 2094 | bool found_interface = false; |
92e189e5 | 2095 | char *prefix; |
992c052c LP |
2096 | int r; |
2097 | ||
dfa92725 | 2098 | assert_return(bus, -EINVAL); |
45b1f410 | 2099 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2100 | assert_return(object_path_is_valid(path), -EINVAL); |
2101 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2102 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2103 | ||
a3d59cd1 LP |
2104 | if (!BUS_IS_OPEN(bus->state)) |
2105 | return -ENOTCONN; | |
a03e4337 LP |
2106 | |
2107 | /* A non-NULL but empty names list means nothing needs to be | |
2108 | generated. A NULL list OTOH indicates that all properties | |
2109 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2110 | included in the PropertiesChanged message. */ | |
2111 | if (names && names[0] == NULL) | |
dfa92725 | 2112 | return 0; |
992c052c | 2113 | |
68313d3d LP |
2114 | do { |
2115 | bus->nodes_modified = false; | |
992c052c | 2116 | |
46525bfc | 2117 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2118 | if (r != 0) |
2119 | return r; | |
68313d3d LP |
2120 | if (bus->nodes_modified) |
2121 | continue; | |
2122 | ||
2123 | prefix = alloca(strlen(path) + 1); | |
2124 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2125 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2126 | if (r != 0) |
2127 | return r; | |
2128 | if (bus->nodes_modified) | |
2129 | break; | |
2130 | } | |
2131 | ||
2132 | } while (bus->nodes_modified); | |
992c052c | 2133 | |
46525bfc | 2134 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2135 | } |
2136 | ||
d9f644e2 | 2137 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2138 | sd_bus *bus, |
2139 | const char *path, | |
2140 | const char *interface, | |
2141 | const char *name, ...) { | |
2142 | ||
250a918d | 2143 | char **names; |
992c052c | 2144 | |
dfa92725 | 2145 | assert_return(bus, -EINVAL); |
45b1f410 | 2146 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2147 | assert_return(object_path_is_valid(path), -EINVAL); |
2148 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2149 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2150 | ||
a3d59cd1 LP |
2151 | if (!BUS_IS_OPEN(bus->state)) |
2152 | return -ENOTCONN; | |
2153 | ||
dfa92725 LP |
2154 | if (!name) |
2155 | return 0; | |
2156 | ||
250a918d | 2157 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2158 | |
2159 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2160 | } | |
2161 | ||
d95eb43e DH |
2162 | static int object_added_append_all_prefix( |
2163 | sd_bus *bus, | |
2164 | sd_bus_message *m, | |
2165 | Set *s, | |
2166 | const char *prefix, | |
2167 | const char *path, | |
2168 | bool require_fallback) { | |
2169 | ||
2170 | const char *previous_interface = NULL; | |
2171 | struct node_vtable *c; | |
2172 | struct node *n; | |
2173 | int r; | |
2174 | ||
2175 | assert(bus); | |
2176 | assert(m); | |
2177 | assert(s); | |
2178 | assert(prefix); | |
2179 | assert(path); | |
2180 | ||
2181 | n = hashmap_get(bus->nodes, prefix); | |
2182 | if (!n) | |
2183 | return 0; | |
2184 | ||
2185 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2186 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2187 | void *u = NULL; |
2188 | ||
2189 | if (require_fallback && !c->is_fallback) | |
2190 | continue; | |
2191 | ||
2192 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2193 | if (r < 0) | |
2194 | return r; | |
2195 | if (bus->nodes_modified) | |
2196 | return 0; | |
2197 | if (r == 0) | |
2198 | continue; | |
2199 | ||
2200 | if (!streq_ptr(c->interface, previous_interface)) { | |
2201 | /* If a child-node already handled this interface, we | |
2202 | * skip it on any of its parents. The child vtables | |
2203 | * always fully override any conflicting vtables of | |
2204 | * any parent node. */ | |
2205 | if (set_get(s, c->interface)) | |
2206 | continue; | |
2207 | ||
2208 | r = set_put(s, c->interface); | |
2209 | if (r < 0) | |
2210 | return r; | |
2211 | ||
2212 | if (previous_interface) { | |
2213 | r = sd_bus_message_close_container(m); | |
2214 | if (r < 0) | |
2215 | return r; | |
2216 | r = sd_bus_message_close_container(m); | |
2217 | if (r < 0) | |
2218 | return r; | |
2219 | } | |
2220 | ||
2221 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2222 | if (r < 0) | |
2223 | return r; | |
2224 | r = sd_bus_message_append(m, "s", c->interface); | |
2225 | if (r < 0) | |
2226 | return r; | |
2227 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2228 | if (r < 0) | |
2229 | return r; | |
2230 | ||
2231 | previous_interface = c->interface; | |
2232 | } | |
2233 | ||
2234 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2235 | if (r < 0) | |
2236 | return r; | |
2237 | if (bus->nodes_modified) | |
2238 | return 0; | |
2239 | } | |
2240 | ||
2241 | if (previous_interface) { | |
2242 | r = sd_bus_message_close_container(m); | |
2243 | if (r < 0) | |
2244 | return r; | |
2245 | r = sd_bus_message_close_container(m); | |
2246 | if (r < 0) | |
2247 | return r; | |
2248 | } | |
2249 | ||
2250 | return 0; | |
2251 | } | |
2252 | ||
2253 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2254 | _cleanup_set_free_ Set *s = NULL; | |
2255 | char *prefix; | |
2256 | int r; | |
2257 | ||
2258 | assert(bus); | |
2259 | assert(m); | |
2260 | assert(path); | |
2261 | ||
2262 | /* | |
2263 | * This appends all interfaces registered on path @path. We first add | |
2264 | * the builtin interfaces, which are always available and handled by | |
2265 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2266 | * followed by all fallback interfaces registered on any parent prefix. | |
2267 | * | |
2268 | * If an interface is registered multiple times on the same node with | |
2269 | * different vtables, we merge all the properties across all vtables. | |
2270 | * However, if a child node has the same interface registered as one of | |
2271 | * its parent nodes has as fallback, we make the child overwrite the | |
2272 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2273 | * handled interfaces during parent traversal, so we skip interfaces on | |
2274 | * a parent that were overwritten by a child. | |
2275 | */ | |
2276 | ||
2277 | s = set_new(&string_hash_ops); | |
2278 | if (!s) | |
2279 | return -ENOMEM; | |
2280 | ||
2281 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2282 | if (r < 0) | |
2283 | return r; | |
2284 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2285 | if (r < 0) | |
2286 | return r; | |
2287 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2288 | if (r < 0) | |
2289 | return r; | |
2290 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2291 | if (r < 0) | |
2292 | return r; | |
2293 | ||
2294 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2295 | if (r < 0) | |
2296 | return r; | |
2297 | if (bus->nodes_modified) | |
2298 | return 0; | |
2299 | ||
2300 | prefix = alloca(strlen(path) + 1); | |
2301 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2302 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2303 | if (r < 0) | |
2304 | return r; | |
2305 | if (bus->nodes_modified) | |
2306 | return 0; | |
2307 | } | |
2308 | ||
2309 | return 0; | |
2310 | } | |
2311 | ||
969a9685 | 2312 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2313 | BUS_DONT_DESTROY(bus); |
2314 | ||
4afd3348 | 2315 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2316 | struct node *object_manager; |
d95eb43e DH |
2317 | int r; |
2318 | ||
2319 | /* | |
2320 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2321 | * all registered vtables and fallback vtables on the path. All | |
2322 | * properties are queried and included in the signal. | |
2323 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2324 | * explicit list of registered interfaces. However, unlike | |
2325 | * interfaces_added(), this call can figure out the list of supported | |
2326 | * interfaces itself. Furthermore, it properly adds the builtin | |
2327 | * org.freedesktop.DBus.* interfaces. | |
2328 | */ | |
2329 | ||
2330 | assert_return(bus, -EINVAL); | |
45b1f410 | 2331 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d95eb43e DH |
2332 | assert_return(object_path_is_valid(path), -EINVAL); |
2333 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2334 | ||
2335 | if (!BUS_IS_OPEN(bus->state)) | |
2336 | return -ENOTCONN; | |
2337 | ||
2d5c8a27 DH |
2338 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2339 | if (r < 0) | |
2340 | return r; | |
2341 | if (r == 0) | |
2342 | return -ESRCH; | |
2343 | ||
d95eb43e DH |
2344 | do { |
2345 | bus->nodes_modified = false; | |
2346 | m = sd_bus_message_unref(m); | |
2347 | ||
2d5c8a27 | 2348 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2349 | if (r < 0) |
2350 | return r; | |
2351 | ||
2352 | r = sd_bus_message_append_basic(m, 'o', path); | |
2353 | if (r < 0) | |
2354 | return r; | |
2355 | ||
2356 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2357 | if (r < 0) | |
2358 | return r; | |
2359 | ||
2360 | r = object_added_append_all(bus, m, path); | |
2361 | if (r < 0) | |
2362 | return r; | |
2363 | ||
2364 | if (bus->nodes_modified) | |
2365 | continue; | |
2366 | ||
2367 | r = sd_bus_message_close_container(m); | |
2368 | if (r < 0) | |
2369 | return r; | |
2370 | ||
2371 | } while (bus->nodes_modified); | |
2372 | ||
2373 | return sd_bus_send(bus, m, NULL); | |
2374 | } | |
2375 | ||
2376 | static int object_removed_append_all_prefix( | |
2377 | sd_bus *bus, | |
2378 | sd_bus_message *m, | |
2379 | Set *s, | |
2380 | const char *prefix, | |
2381 | const char *path, | |
2382 | bool require_fallback) { | |
2383 | ||
2384 | const char *previous_interface = NULL; | |
2385 | struct node_vtable *c; | |
2386 | struct node *n; | |
2387 | int r; | |
2388 | ||
2389 | assert(bus); | |
2390 | assert(m); | |
2391 | assert(s); | |
2392 | assert(prefix); | |
2393 | assert(path); | |
2394 | ||
2395 | n = hashmap_get(bus->nodes, prefix); | |
2396 | if (!n) | |
2397 | return 0; | |
2398 | ||
2399 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2400 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2401 | void *u = NULL; |
2402 | ||
2403 | if (require_fallback && !c->is_fallback) | |
2404 | continue; | |
2405 | if (streq_ptr(c->interface, previous_interface)) | |
2406 | continue; | |
2407 | ||
2408 | /* If a child-node already handled this interface, we | |
2409 | * skip it on any of its parents. The child vtables | |
2410 | * always fully override any conflicting vtables of | |
2411 | * any parent node. */ | |
2412 | if (set_get(s, c->interface)) | |
2413 | continue; | |
2414 | ||
2415 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2416 | if (r < 0) | |
2417 | return r; | |
2418 | if (bus->nodes_modified) | |
2419 | return 0; | |
2420 | if (r == 0) | |
2421 | continue; | |
2422 | ||
2423 | r = set_put(s, c->interface); | |
2424 | if (r < 0) | |
2425 | return r; | |
2426 | ||
2427 | r = sd_bus_message_append(m, "s", c->interface); | |
2428 | if (r < 0) | |
2429 | return r; | |
2430 | ||
2431 | previous_interface = c->interface; | |
2432 | } | |
2433 | ||
2434 | return 0; | |
2435 | } | |
2436 | ||
2437 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2438 | _cleanup_set_free_ Set *s = NULL; | |
2439 | char *prefix; | |
2440 | int r; | |
2441 | ||
2442 | assert(bus); | |
2443 | assert(m); | |
2444 | assert(path); | |
2445 | ||
2446 | /* see sd_bus_emit_object_added() for details */ | |
2447 | ||
2448 | s = set_new(&string_hash_ops); | |
2449 | if (!s) | |
2450 | return -ENOMEM; | |
2451 | ||
2452 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2453 | if (r < 0) | |
2454 | return r; | |
2455 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2456 | if (r < 0) | |
2457 | return r; | |
2458 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2459 | if (r < 0) | |
2460 | return r; | |
2461 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2462 | if (r < 0) | |
2463 | return r; | |
2464 | ||
2465 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2466 | if (r < 0) | |
2467 | return r; | |
2468 | if (bus->nodes_modified) | |
2469 | return 0; | |
2470 | ||
2471 | prefix = alloca(strlen(path) + 1); | |
2472 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2473 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2474 | if (r < 0) | |
2475 | return r; | |
2476 | if (bus->nodes_modified) | |
2477 | return 0; | |
2478 | } | |
2479 | ||
2480 | return 0; | |
2481 | } | |
2482 | ||
969a9685 | 2483 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2484 | BUS_DONT_DESTROY(bus); |
2485 | ||
4afd3348 | 2486 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2487 | struct node *object_manager; |
d95eb43e DH |
2488 | int r; |
2489 | ||
2490 | /* | |
2491 | * This is like sd_bus_emit_object_added(), but emits an | |
2492 | * InterfacesRemoved signal on the given path. This only includes any | |
2493 | * registered interfaces but skips the properties. Note that this will | |
2494 | * call into the find() callbacks of any registered vtable. Therefore, | |
2495 | * you must call this function before destroying/unlinking your object. | |
2496 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2497 | * that this will *NOT* call into any property callback. Therefore, the | |
2498 | * object might be in an "destructed" state, as long as we can find it. | |
2499 | */ | |
2500 | ||
2501 | assert_return(bus, -EINVAL); | |
45b1f410 | 2502 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d95eb43e DH |
2503 | assert_return(object_path_is_valid(path), -EINVAL); |
2504 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2505 | ||
2506 | if (!BUS_IS_OPEN(bus->state)) | |
2507 | return -ENOTCONN; | |
2508 | ||
2d5c8a27 DH |
2509 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2510 | if (r < 0) | |
2511 | return r; | |
2512 | if (r == 0) | |
2513 | return -ESRCH; | |
2514 | ||
d95eb43e DH |
2515 | do { |
2516 | bus->nodes_modified = false; | |
2517 | m = sd_bus_message_unref(m); | |
2518 | ||
2d5c8a27 | 2519 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2520 | if (r < 0) |
2521 | return r; | |
2522 | ||
2523 | r = sd_bus_message_append_basic(m, 'o', path); | |
2524 | if (r < 0) | |
2525 | return r; | |
2526 | ||
2527 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2528 | if (r < 0) | |
2529 | return r; | |
2530 | ||
2531 | r = object_removed_append_all(bus, m, path); | |
2532 | if (r < 0) | |
2533 | return r; | |
2534 | ||
2535 | if (bus->nodes_modified) | |
2536 | continue; | |
2537 | ||
2538 | r = sd_bus_message_close_container(m); | |
2539 | if (r < 0) | |
2540 | return r; | |
2541 | ||
2542 | } while (bus->nodes_modified); | |
2543 | ||
2544 | return sd_bus_send(bus, m, NULL); | |
2545 | } | |
2546 | ||
4be39163 LP |
2547 | static int interfaces_added_append_one_prefix( |
2548 | sd_bus *bus, | |
2549 | sd_bus_message *m, | |
2550 | const char *prefix, | |
2551 | const char *path, | |
2552 | const char *interface, | |
2553 | bool require_fallback) { | |
2554 | ||
4afd3348 | 2555 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
718db961 | 2556 | bool found_interface = false; |
4be39163 LP |
2557 | struct node_vtable *c; |
2558 | struct node *n; | |
2559 | void *u = NULL; | |
2560 | int r; | |
2561 | ||
2562 | assert(bus); | |
2563 | assert(m); | |
2564 | assert(prefix); | |
2565 | assert(path); | |
2566 | assert(interface); | |
2567 | ||
2568 | n = hashmap_get(bus->nodes, prefix); | |
2569 | if (!n) | |
2570 | return 0; | |
2571 | ||
2572 | LIST_FOREACH(vtables, c, n->vtables) { | |
2573 | if (require_fallback && !c->is_fallback) | |
2574 | continue; | |
2575 | ||
718db961 LP |
2576 | if (!streq(c->interface, interface)) |
2577 | continue; | |
4be39163 | 2578 | |
f00c3121 | 2579 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2580 | if (r < 0) |
2581 | return r; | |
2582 | if (bus->nodes_modified) | |
2583 | return 0; | |
2584 | if (r == 0) | |
2585 | continue; | |
4be39163 | 2586 | |
718db961 LP |
2587 | if (!found_interface) { |
2588 | r = sd_bus_message_append_basic(m, 's', interface); | |
2589 | if (r < 0) | |
2590 | return r; | |
4be39163 | 2591 | |
718db961 LP |
2592 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2593 | if (r < 0) | |
2594 | return r; | |
4be39163 | 2595 | |
718db961 LP |
2596 | found_interface = true; |
2597 | } | |
4be39163 | 2598 | |
718db961 LP |
2599 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2600 | if (r < 0) | |
2601 | return r; | |
2602 | if (bus->nodes_modified) | |
2603 | return 0; | |
2604 | } | |
4be39163 | 2605 | |
718db961 LP |
2606 | if (found_interface) { |
2607 | r = sd_bus_message_close_container(m); | |
2608 | if (r < 0) | |
2609 | return r; | |
2610 | } | |
4be39163 | 2611 | |
718db961 | 2612 | return found_interface; |
4be39163 LP |
2613 | } |
2614 | ||
2615 | static int interfaces_added_append_one( | |
2616 | sd_bus *bus, | |
2617 | sd_bus_message *m, | |
2618 | const char *path, | |
2619 | const char *interface) { | |
2620 | ||
2621 | char *prefix; | |
2622 | int r; | |
2623 | ||
2624 | assert(bus); | |
2625 | assert(m); | |
2626 | assert(path); | |
2627 | assert(interface); | |
2628 | ||
2629 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2630 | if (r != 0) | |
2631 | return r; | |
68313d3d LP |
2632 | if (bus->nodes_modified) |
2633 | return 0; | |
4be39163 LP |
2634 | |
2635 | prefix = alloca(strlen(path) + 1); | |
2636 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2637 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2638 | if (r != 0) | |
2639 | return r; | |
68313d3d LP |
2640 | if (bus->nodes_modified) |
2641 | return 0; | |
4be39163 LP |
2642 | } |
2643 | ||
2644 | return -ENOENT; | |
992c052c LP |
2645 | } |
2646 | ||
d9f644e2 | 2647 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2648 | BUS_DONT_DESTROY(bus); |
2649 | ||
4afd3348 | 2650 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2651 | struct node *object_manager; |
4be39163 LP |
2652 | char **i; |
2653 | int r; | |
2654 | ||
2655 | assert_return(bus, -EINVAL); | |
45b1f410 | 2656 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2657 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2658 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2659 | ||
a3d59cd1 LP |
2660 | if (!BUS_IS_OPEN(bus->state)) |
2661 | return -ENOTCONN; | |
2662 | ||
4be39163 LP |
2663 | if (strv_isempty(interfaces)) |
2664 | return 0; | |
2665 | ||
2d5c8a27 DH |
2666 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2667 | if (r < 0) | |
2668 | return r; | |
2669 | if (r == 0) | |
2670 | return -ESRCH; | |
2671 | ||
68313d3d LP |
2672 | do { |
2673 | bus->nodes_modified = false; | |
1b02f301 | 2674 | m = sd_bus_message_unref(m); |
4be39163 | 2675 | |
2d5c8a27 | 2676 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2677 | if (r < 0) |
2678 | return r; | |
4be39163 | 2679 | |
68313d3d | 2680 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2681 | if (r < 0) |
2682 | return r; | |
2683 | ||
68313d3d | 2684 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2685 | if (r < 0) |
2686 | return r; | |
2687 | ||
68313d3d LP |
2688 | STRV_FOREACH(i, interfaces) { |
2689 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2690 | ||
2691 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2692 | if (r < 0) | |
2693 | return r; | |
2694 | ||
2695 | r = interfaces_added_append_one(bus, m, path, *i); | |
2696 | if (r < 0) | |
2697 | return r; | |
2698 | ||
2699 | if (bus->nodes_modified) | |
2700 | break; | |
2701 | ||
2702 | r = sd_bus_message_close_container(m); | |
2703 | if (r < 0) | |
2704 | return r; | |
2705 | } | |
2706 | ||
2707 | if (bus->nodes_modified) | |
2708 | continue; | |
2709 | ||
4be39163 LP |
2710 | r = sd_bus_message_close_container(m); |
2711 | if (r < 0) | |
2712 | return r; | |
4be39163 | 2713 | |
68313d3d | 2714 | } while (bus->nodes_modified); |
4be39163 LP |
2715 | |
2716 | return sd_bus_send(bus, m, NULL); | |
2717 | } | |
2718 | ||
d9f644e2 | 2719 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2720 | char **interfaces; |
4be39163 LP |
2721 | |
2722 | assert_return(bus, -EINVAL); | |
45b1f410 | 2723 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2724 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2725 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2726 | ||
a3d59cd1 LP |
2727 | if (!BUS_IS_OPEN(bus->state)) |
2728 | return -ENOTCONN; | |
2729 | ||
250a918d | 2730 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2731 | |
2732 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2733 | } | |
2734 | ||
d9f644e2 | 2735 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4afd3348 | 2736 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2737 | struct node *object_manager; |
4be39163 LP |
2738 | int r; |
2739 | ||
2740 | assert_return(bus, -EINVAL); | |
45b1f410 | 2741 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2742 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2743 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2744 | ||
a3d59cd1 LP |
2745 | if (!BUS_IS_OPEN(bus->state)) |
2746 | return -ENOTCONN; | |
2747 | ||
4be39163 LP |
2748 | if (strv_isempty(interfaces)) |
2749 | return 0; | |
2750 | ||
2d5c8a27 DH |
2751 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2752 | if (r < 0) | |
2753 | return r; | |
2754 | if (r == 0) | |
2755 | return -ESRCH; | |
2756 | ||
2757 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2758 | if (r < 0) |
2759 | return r; | |
2760 | ||
2761 | r = sd_bus_message_append_basic(m, 'o', path); | |
2762 | if (r < 0) | |
2763 | return r; | |
2764 | ||
2765 | r = sd_bus_message_append_strv(m, interfaces); | |
2766 | if (r < 0) | |
2767 | return r; | |
2768 | ||
2769 | return sd_bus_send(bus, m, NULL); | |
2770 | } | |
2771 | ||
d9f644e2 | 2772 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2773 | char **interfaces; |
4be39163 LP |
2774 | |
2775 | assert_return(bus, -EINVAL); | |
45b1f410 | 2776 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2777 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2778 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2779 | ||
a3d59cd1 LP |
2780 | if (!BUS_IS_OPEN(bus->state)) |
2781 | return -ENOTCONN; | |
2782 | ||
250a918d | 2783 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2784 | |
2785 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2786 | } |
2787 | ||
19befb2d LP |
2788 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2789 | sd_bus_slot *s; | |
992c052c | 2790 | struct node *n; |
19befb2d | 2791 | int r; |
992c052c | 2792 | |
dfa92725 | 2793 | assert_return(bus, -EINVAL); |
45b1f410 | 2794 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2795 | assert_return(object_path_is_valid(path), -EINVAL); |
2796 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2797 | |
2798 | n = bus_node_allocate(bus, path); | |
2799 | if (!n) | |
2800 | return -ENOMEM; | |
2801 | ||
19befb2d LP |
2802 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2803 | if (!s) { | |
2804 | r = -ENOMEM; | |
2805 | goto fail; | |
2806 | } | |
992c052c | 2807 | |
19befb2d LP |
2808 | s->node_object_manager.node = n; |
2809 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2810 | bus->nodes_modified = true; | |
992c052c | 2811 | |
19befb2d LP |
2812 | if (slot) |
2813 | *slot = s; | |
992c052c | 2814 | |
19befb2d | 2815 | return 0; |
992c052c | 2816 | |
19befb2d LP |
2817 | fail: |
2818 | sd_bus_slot_unref(s); | |
992c052c | 2819 | bus_node_gc(bus, n); |
dfa92725 | 2820 | |
19befb2d | 2821 | return r; |
992c052c | 2822 | } |