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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
992c052c LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
992c052c LP |
6 | ***/ |
7 | ||
b5efdb8a | 8 | #include "alloc-util.h" |
992c052c | 9 | #include "bus-internal.h" |
07630cea | 10 | #include "bus-introspect.h" |
992c052c | 11 | #include "bus-message.h" |
cf0fbc49 | 12 | #include "bus-objects.h" |
992c052c | 13 | #include "bus-signature.h" |
19befb2d | 14 | #include "bus-slot.h" |
07630cea LP |
15 | #include "bus-type.h" |
16 | #include "bus-util.h" | |
17 | #include "set.h" | |
18 | #include "string-util.h" | |
19 | #include "strv.h" | |
992c052c LP |
20 | |
21 | static int node_vtable_get_userdata( | |
22 | sd_bus *bus, | |
23 | const char *path, | |
24 | struct node_vtable *c, | |
f00c3121 LP |
25 | void **userdata, |
26 | sd_bus_error *error) { | |
992c052c | 27 | |
19befb2d | 28 | sd_bus_slot *s; |
00590f82 | 29 | void *u, *found_u; |
992c052c LP |
30 | int r; |
31 | ||
32 | assert(bus); | |
33 | assert(path); | |
34 | assert(c); | |
35 | ||
19befb2d LP |
36 | s = container_of(c, sd_bus_slot, node_vtable); |
37 | u = s->userdata; | |
992c052c | 38 | if (c->find) { |
1b64f838 | 39 | bus->current_slot = sd_bus_slot_ref(s); |
caa82984 | 40 | bus->current_userdata = u; |
00590f82 | 41 | r = c->find(bus, path, c->interface, u, &found_u, error); |
caa82984 | 42 | bus->current_userdata = NULL; |
1b64f838 | 43 | bus->current_slot = sd_bus_slot_unref(s); |
19befb2d | 44 | |
f00c3121 LP |
45 | if (r < 0) |
46 | return r; | |
47 | if (sd_bus_error_is_set(error)) | |
5958d089 | 48 | return -sd_bus_error_get_errno(error); |
f00c3121 | 49 | if (r == 0) |
992c052c | 50 | return r; |
00590f82 AJ |
51 | } else |
52 | found_u = u; | |
992c052c LP |
53 | |
54 | if (userdata) | |
00590f82 | 55 | *userdata = found_u; |
992c052c LP |
56 | |
57 | return 1; | |
58 | } | |
59 | ||
09c8a7c6 | 60 | static void *vtable_method_convert_userdata(const sd_bus_vtable *p, void *u) { |
61 | assert(p); | |
62 | ||
63 | return (uint8_t*) u + p->x.method.offset; | |
64 | } | |
65 | ||
992c052c LP |
66 | static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) { |
67 | assert(p); | |
68 | ||
77a874a3 | 69 | return (uint8_t*) u + p->x.property.offset; |
992c052c LP |
70 | } |
71 | ||
72 | static int vtable_property_get_userdata( | |
73 | sd_bus *bus, | |
74 | const char *path, | |
75 | struct vtable_member *p, | |
f00c3121 LP |
76 | void **userdata, |
77 | sd_bus_error *error) { | |
992c052c LP |
78 | |
79 | void *u; | |
80 | int r; | |
81 | ||
82 | assert(bus); | |
83 | assert(path); | |
84 | assert(p); | |
85 | assert(userdata); | |
86 | ||
f00c3121 | 87 | r = node_vtable_get_userdata(bus, path, p->parent, &u, error); |
992c052c LP |
88 | if (r <= 0) |
89 | return r; | |
68313d3d LP |
90 | if (bus->nodes_modified) |
91 | return 0; | |
992c052c LP |
92 | |
93 | *userdata = vtable_property_convert_userdata(p->vtable, u); | |
94 | return 1; | |
95 | } | |
96 | ||
dfa92725 LP |
97 | static int add_enumerated_to_set( |
98 | sd_bus *bus, | |
99 | const char *prefix, | |
100 | struct node_enumerator *first, | |
f00c3121 LP |
101 | Set *s, |
102 | sd_bus_error *error) { | |
dfa92725 | 103 | |
992c052c LP |
104 | struct node_enumerator *c; |
105 | int r; | |
106 | ||
107 | assert(bus); | |
108 | assert(prefix); | |
109 | assert(s); | |
110 | ||
111 | LIST_FOREACH(enumerators, c, first) { | |
112 | char **children = NULL, **k; | |
1b64f838 | 113 | sd_bus_slot *slot; |
992c052c | 114 | |
68313d3d LP |
115 | if (bus->nodes_modified) |
116 | return 0; | |
117 | ||
1b64f838 LP |
118 | slot = container_of(c, sd_bus_slot, node_enumerator); |
119 | ||
120 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 | 121 | bus->current_userdata = slot->userdata; |
1b64f838 | 122 | r = c->callback(bus, prefix, slot->userdata, &children, error); |
caa82984 | 123 | bus->current_userdata = NULL; |
1b64f838 | 124 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 125 | |
992c052c LP |
126 | if (r < 0) |
127 | return r; | |
f00c3121 | 128 | if (sd_bus_error_is_set(error)) |
5958d089 | 129 | return -sd_bus_error_get_errno(error); |
992c052c LP |
130 | |
131 | STRV_FOREACH(k, children) { | |
132 | if (r < 0) { | |
133 | free(*k); | |
134 | continue; | |
135 | } | |
136 | ||
9ed794a3 | 137 | if (!object_path_is_valid(*k)) { |
992c052c LP |
138 | free(*k); |
139 | r = -EINVAL; | |
140 | continue; | |
141 | } | |
142 | ||
5d66866d LP |
143 | if (!object_path_startswith(*k, prefix)) { |
144 | free(*k); | |
145 | continue; | |
146 | } | |
147 | ||
992c052c | 148 | r = set_consume(s, *k); |
52c7f2b2 LP |
149 | if (r == -EEXIST) |
150 | r = 0; | |
992c052c LP |
151 | } |
152 | ||
153 | free(children); | |
154 | if (r < 0) | |
155 | return r; | |
156 | } | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
44eb1add DH |
161 | enum { |
162 | /* if set, add_subtree() works recursively */ | |
163 | CHILDREN_RECURSIVE = (1U << 1), | |
164 | /* if set, add_subtree() scans object-manager hierarchies recursively */ | |
165 | CHILDREN_SUBHIERARCHIES = (1U << 0), | |
166 | }; | |
167 | ||
dfa92725 LP |
168 | static int add_subtree_to_set( |
169 | sd_bus *bus, | |
170 | const char *prefix, | |
171 | struct node *n, | |
44eb1add | 172 | unsigned int flags, |
f00c3121 LP |
173 | Set *s, |
174 | sd_bus_error *error) { | |
dfa92725 | 175 | |
992c052c LP |
176 | struct node *i; |
177 | int r; | |
178 | ||
179 | assert(bus); | |
180 | assert(prefix); | |
181 | assert(n); | |
182 | assert(s); | |
183 | ||
f00c3121 | 184 | r = add_enumerated_to_set(bus, prefix, n->enumerators, s, error); |
992c052c LP |
185 | if (r < 0) |
186 | return r; | |
68313d3d LP |
187 | if (bus->nodes_modified) |
188 | return 0; | |
992c052c LP |
189 | |
190 | LIST_FOREACH(siblings, i, n->child) { | |
191 | char *t; | |
192 | ||
5d66866d LP |
193 | if (!object_path_startswith(i->path, prefix)) |
194 | continue; | |
195 | ||
992c052c LP |
196 | t = strdup(i->path); |
197 | if (!t) | |
198 | return -ENOMEM; | |
199 | ||
200 | r = set_consume(s, t); | |
201 | if (r < 0 && r != -EEXIST) | |
202 | return r; | |
203 | ||
44eb1add DH |
204 | if ((flags & CHILDREN_RECURSIVE) && |
205 | ((flags & CHILDREN_SUBHIERARCHIES) || !i->object_managers)) { | |
206 | r = add_subtree_to_set(bus, prefix, i, flags, s, error); | |
2d5c8a27 DH |
207 | if (r < 0) |
208 | return r; | |
209 | if (bus->nodes_modified) | |
210 | return 0; | |
211 | } | |
992c052c LP |
212 | } |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
dfa92725 LP |
217 | static int get_child_nodes( |
218 | sd_bus *bus, | |
219 | const char *prefix, | |
220 | struct node *n, | |
44eb1add | 221 | unsigned int flags, |
f00c3121 LP |
222 | Set **_s, |
223 | sd_bus_error *error) { | |
dfa92725 | 224 | |
992c052c LP |
225 | Set *s = NULL; |
226 | int r; | |
227 | ||
228 | assert(bus); | |
dfa92725 | 229 | assert(prefix); |
992c052c LP |
230 | assert(n); |
231 | assert(_s); | |
232 | ||
d5099efc | 233 | s = set_new(&string_hash_ops); |
992c052c LP |
234 | if (!s) |
235 | return -ENOMEM; | |
236 | ||
44eb1add | 237 | r = add_subtree_to_set(bus, prefix, n, flags, s, error); |
992c052c LP |
238 | if (r < 0) { |
239 | set_free_free(s); | |
240 | return r; | |
241 | } | |
242 | ||
243 | *_s = s; | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static int node_callbacks_run( | |
248 | sd_bus *bus, | |
249 | sd_bus_message *m, | |
250 | struct node_callback *first, | |
251 | bool require_fallback, | |
252 | bool *found_object) { | |
253 | ||
254 | struct node_callback *c; | |
255 | int r; | |
256 | ||
257 | assert(bus); | |
258 | assert(m); | |
259 | assert(found_object); | |
260 | ||
261 | LIST_FOREACH(callbacks, c, first) { | |
4afd3348 | 262 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 263 | sd_bus_slot *slot; |
ebcf1f97 | 264 | |
68313d3d LP |
265 | if (bus->nodes_modified) |
266 | return 0; | |
267 | ||
992c052c LP |
268 | if (require_fallback && !c->is_fallback) |
269 | continue; | |
270 | ||
271 | *found_object = true; | |
272 | ||
273 | if (c->last_iteration == bus->iteration_counter) | |
274 | continue; | |
275 | ||
68313d3d LP |
276 | c->last_iteration = bus->iteration_counter; |
277 | ||
992c052c LP |
278 | r = sd_bus_message_rewind(m, true); |
279 | if (r < 0) | |
280 | return r; | |
281 | ||
1b64f838 LP |
282 | slot = container_of(c, sd_bus_slot, node_callback); |
283 | ||
284 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
285 | bus->current_handler = c->callback; |
286 | bus->current_userdata = slot->userdata; | |
19070062 | 287 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
288 | bus->current_userdata = NULL; |
289 | bus->current_handler = NULL; | |
1b64f838 | 290 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 291 | |
ebcf1f97 | 292 | r = bus_maybe_reply_error(m, r, &error_buffer); |
992c052c LP |
293 | if (r != 0) |
294 | return r; | |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
adacb957 LP |
300 | #define CAPABILITY_SHIFT(x) (((x) >> __builtin_ctzll(_SD_BUS_VTABLE_CAPABILITY_MASK)) & 0xFFFF) |
301 | ||
302 | static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) { | |
adacb957 | 303 | uint64_t cap; |
adacb957 LP |
304 | int r; |
305 | ||
306 | assert(bus); | |
307 | assert(m); | |
308 | assert(c); | |
309 | ||
310 | /* If the entire bus is trusted let's grant access */ | |
311 | if (bus->trusted) | |
312 | return 0; | |
313 | ||
314 | /* If the member is marked UNPRIVILEGED let's grant access */ | |
315 | if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED) | |
316 | return 0; | |
317 | ||
adacb957 LP |
318 | /* Check have the caller has the requested capability |
319 | * set. Note that the flags value contains the capability | |
320 | * number plus one, which we need to subtract here. We do this | |
321 | * so that we have 0 as special value for "default | |
322 | * capability". */ | |
323 | cap = CAPABILITY_SHIFT(c->vtable->flags); | |
324 | if (cap == 0) | |
325 | cap = CAPABILITY_SHIFT(c->parent->vtable[0].flags); | |
326 | if (cap == 0) | |
327 | cap = CAP_SYS_ADMIN; | |
328 | else | |
313cefa1 | 329 | cap--; |
adacb957 | 330 | |
def9a7aa LP |
331 | r = sd_bus_query_sender_privilege(m, cap); |
332 | if (r < 0) | |
333 | return r; | |
adacb957 | 334 | if (r > 0) |
def9a7aa | 335 | return 0; |
adacb957 LP |
336 | |
337 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access to %s.%s() not permitted.", c->interface, c->member); | |
338 | } | |
339 | ||
992c052c LP |
340 | static int method_callbacks_run( |
341 | sd_bus *bus, | |
342 | sd_bus_message *m, | |
343 | struct vtable_member *c, | |
344 | bool require_fallback, | |
345 | bool *found_object) { | |
346 | ||
4afd3348 | 347 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
348 | const char *signature; |
349 | void *u; | |
350 | int r; | |
351 | ||
352 | assert(bus); | |
353 | assert(m); | |
354 | assert(c); | |
355 | assert(found_object); | |
356 | ||
357 | if (require_fallback && !c->parent->is_fallback) | |
358 | return 0; | |
359 | ||
adacb957 LP |
360 | r = check_access(bus, m, c, &error); |
361 | if (r < 0) | |
362 | return bus_maybe_reply_error(m, r, &error); | |
363 | ||
f00c3121 | 364 | r = node_vtable_get_userdata(bus, m->path, c->parent, &u, &error); |
992c052c | 365 | if (r <= 0) |
f00c3121 | 366 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
367 | if (bus->nodes_modified) |
368 | return 0; | |
992c052c | 369 | |
09c8a7c6 | 370 | u = vtable_method_convert_userdata(c->vtable, u); |
371 | ||
992c052c LP |
372 | *found_object = true; |
373 | ||
68313d3d LP |
374 | if (c->last_iteration == bus->iteration_counter) |
375 | return 0; | |
376 | ||
377 | c->last_iteration = bus->iteration_counter; | |
378 | ||
992c052c LP |
379 | r = sd_bus_message_rewind(m, true); |
380 | if (r < 0) | |
381 | return r; | |
382 | ||
40ca29a1 LP |
383 | signature = sd_bus_message_get_signature(m, true); |
384 | if (!signature) | |
385 | return -EINVAL; | |
992c052c | 386 | |
f00c3121 | 387 | if (!streq(strempty(c->vtable->x.method.signature), signature)) |
86b8d289 LP |
388 | return sd_bus_reply_method_errorf( |
389 | m, | |
390 | SD_BUS_ERROR_INVALID_ARGS, | |
391 | "Invalid arguments '%s' to call %s.%s(), expecting '%s'.", | |
392 | signature, c->interface, c->member, strempty(c->vtable->x.method.signature)); | |
992c052c | 393 | |
6717d473 LP |
394 | /* Keep track what the signature of the reply to this message |
395 | * should be, so that this can be enforced when sealing the | |
396 | * reply. */ | |
397 | m->enforced_reply_signature = strempty(c->vtable->x.method.result); | |
398 | ||
ebcf1f97 | 399 | if (c->vtable->x.method.handler) { |
1b64f838 LP |
400 | sd_bus_slot *slot; |
401 | ||
402 | slot = container_of(c->parent, sd_bus_slot, node_vtable); | |
19befb2d | 403 | |
1b64f838 | 404 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
405 | bus->current_handler = c->vtable->x.method.handler; |
406 | bus->current_userdata = u; | |
19070062 | 407 | r = c->vtable->x.method.handler(m, u, &error); |
caa82984 LP |
408 | bus->current_userdata = NULL; |
409 | bus->current_handler = NULL; | |
1b64f838 | 410 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 411 | |
f00c3121 | 412 | return bus_maybe_reply_error(m, r, &error); |
ebcf1f97 | 413 | } |
992c052c LP |
414 | |
415 | /* If the method callback is NULL, make this a successful NOP */ | |
df2d202e | 416 | r = sd_bus_reply_method_return(m, NULL); |
992c052c LP |
417 | if (r < 0) |
418 | return r; | |
419 | ||
420 | return 1; | |
421 | } | |
422 | ||
423 | static int invoke_property_get( | |
424 | sd_bus *bus, | |
19befb2d | 425 | sd_bus_slot *slot, |
992c052c LP |
426 | const sd_bus_vtable *v, |
427 | const char *path, | |
428 | const char *interface, | |
429 | const char *property, | |
ebcf1f97 LP |
430 | sd_bus_message *reply, |
431 | void *userdata, | |
432 | sd_bus_error *error) { | |
992c052c | 433 | |
af8601fa | 434 | const void *p; |
f00c3121 | 435 | int r; |
992c052c LP |
436 | |
437 | assert(bus); | |
19befb2d | 438 | assert(slot); |
992c052c | 439 | assert(v); |
dfa92725 LP |
440 | assert(path); |
441 | assert(interface); | |
442 | assert(property); | |
ebcf1f97 | 443 | assert(reply); |
992c052c | 444 | |
f00c3121 | 445 | if (v->x.property.get) { |
19befb2d | 446 | |
1b64f838 | 447 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 448 | bus->current_userdata = userdata; |
f00c3121 | 449 | r = v->x.property.get(bus, path, interface, property, reply, userdata, error); |
caa82984 | 450 | bus->current_userdata = NULL; |
1b64f838 | 451 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 452 | |
f00c3121 LP |
453 | if (r < 0) |
454 | return r; | |
455 | if (sd_bus_error_is_set(error)) | |
5958d089 | 456 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
457 | return r; |
458 | } | |
992c052c LP |
459 | |
460 | /* Automatic handling if no callback is defined. */ | |
461 | ||
c13c7de3 | 462 | if (streq(v->x.property.signature, "as")) |
ebcf1f97 | 463 | return sd_bus_message_append_strv(reply, *(char***) userdata); |
c13c7de3 | 464 | |
77a874a3 LP |
465 | assert(signature_is_single(v->x.property.signature, false)); |
466 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 467 | |
77a874a3 | 468 | switch (v->x.property.signature[0]) { |
992c052c LP |
469 | |
470 | case SD_BUS_TYPE_STRING: | |
28d6633a LP |
471 | case SD_BUS_TYPE_SIGNATURE: |
472 | p = strempty(*(char**) userdata); | |
af8601fa KS |
473 | break; |
474 | ||
992c052c | 475 | case SD_BUS_TYPE_OBJECT_PATH: |
992c052c | 476 | p = *(char**) userdata; |
28d6633a | 477 | assert(p); |
992c052c LP |
478 | break; |
479 | ||
480 | default: | |
481 | p = userdata; | |
482 | break; | |
483 | } | |
484 | ||
ebcf1f97 | 485 | return sd_bus_message_append_basic(reply, v->x.property.signature[0], p); |
992c052c LP |
486 | } |
487 | ||
488 | static int invoke_property_set( | |
489 | sd_bus *bus, | |
19befb2d | 490 | sd_bus_slot *slot, |
992c052c LP |
491 | const sd_bus_vtable *v, |
492 | const char *path, | |
493 | const char *interface, | |
494 | const char *property, | |
495 | sd_bus_message *value, | |
ebcf1f97 LP |
496 | void *userdata, |
497 | sd_bus_error *error) { | |
992c052c LP |
498 | |
499 | int r; | |
500 | ||
501 | assert(bus); | |
19befb2d | 502 | assert(slot); |
992c052c | 503 | assert(v); |
dfa92725 LP |
504 | assert(path); |
505 | assert(interface); | |
506 | assert(property); | |
507 | assert(value); | |
992c052c | 508 | |
f00c3121 | 509 | if (v->x.property.set) { |
19befb2d | 510 | |
1b64f838 | 511 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 512 | bus->current_userdata = userdata; |
f00c3121 | 513 | r = v->x.property.set(bus, path, interface, property, value, userdata, error); |
caa82984 | 514 | bus->current_userdata = NULL; |
1b64f838 | 515 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 516 | |
f00c3121 LP |
517 | if (r < 0) |
518 | return r; | |
519 | if (sd_bus_error_is_set(error)) | |
5958d089 | 520 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
521 | return r; |
522 | } | |
992c052c LP |
523 | |
524 | /* Automatic handling if no callback is defined. */ | |
525 | ||
77a874a3 LP |
526 | assert(signature_is_single(v->x.property.signature, false)); |
527 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 528 | |
77a874a3 | 529 | switch (v->x.property.signature[0]) { |
992c052c LP |
530 | |
531 | case SD_BUS_TYPE_STRING: | |
532 | case SD_BUS_TYPE_OBJECT_PATH: | |
533 | case SD_BUS_TYPE_SIGNATURE: { | |
534 | const char *p; | |
535 | char *n; | |
536 | ||
77a874a3 | 537 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], &p); |
992c052c LP |
538 | if (r < 0) |
539 | return r; | |
540 | ||
541 | n = strdup(p); | |
542 | if (!n) | |
543 | return -ENOMEM; | |
544 | ||
545 | free(*(char**) userdata); | |
546 | *(char**) userdata = n; | |
547 | ||
548 | break; | |
549 | } | |
550 | ||
551 | default: | |
77a874a3 | 552 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], userdata); |
992c052c LP |
553 | if (r < 0) |
554 | return r; | |
555 | ||
556 | break; | |
557 | } | |
558 | ||
559 | return 1; | |
560 | } | |
561 | ||
562 | static int property_get_set_callbacks_run( | |
563 | sd_bus *bus, | |
564 | sd_bus_message *m, | |
565 | struct vtable_member *c, | |
566 | bool require_fallback, | |
567 | bool is_get, | |
568 | bool *found_object) { | |
569 | ||
4afd3348 LP |
570 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
571 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
19befb2d | 572 | sd_bus_slot *slot; |
c94d7fc3 | 573 | void *u = NULL; |
992c052c LP |
574 | int r; |
575 | ||
576 | assert(bus); | |
577 | assert(m); | |
dfa92725 | 578 | assert(c); |
992c052c LP |
579 | assert(found_object); |
580 | ||
581 | if (require_fallback && !c->parent->is_fallback) | |
582 | return 0; | |
583 | ||
f00c3121 | 584 | r = vtable_property_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 585 | if (r <= 0) |
f00c3121 | 586 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
587 | if (bus->nodes_modified) |
588 | return 0; | |
992c052c | 589 | |
19befb2d LP |
590 | slot = container_of(c->parent, sd_bus_slot, node_vtable); |
591 | ||
992c052c LP |
592 | *found_object = true; |
593 | ||
df2d202e | 594 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
595 | if (r < 0) |
596 | return r; | |
597 | ||
992c052c | 598 | if (is_get) { |
68313d3d LP |
599 | /* Note that we do not protect against reexecution |
600 | * here (using the last_iteration check, see below), | |
601 | * should the node tree have changed and we got called | |
602 | * again. We assume that property Get() calls are | |
603 | * ultimately without side-effects or if they aren't | |
604 | * then at least idempotent. */ | |
605 | ||
77a874a3 | 606 | r = sd_bus_message_open_container(reply, 'v', c->vtable->x.property.signature); |
992c052c LP |
607 | if (r < 0) |
608 | return r; | |
609 | ||
adacb957 LP |
610 | /* Note that we do not do an access check here. Read |
611 | * access to properties is always unrestricted, since | |
612 | * PropertiesChanged signals broadcast contents | |
613 | * anyway. */ | |
614 | ||
19befb2d | 615 | r = invoke_property_get(bus, slot, c->vtable, m->path, c->interface, c->member, reply, u, &error); |
992c052c | 616 | if (r < 0) |
f00c3121 | 617 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 618 | |
68313d3d LP |
619 | if (bus->nodes_modified) |
620 | return 0; | |
621 | ||
992c052c LP |
622 | r = sd_bus_message_close_container(reply); |
623 | if (r < 0) | |
624 | return r; | |
625 | ||
626 | } else { | |
0ca454d4 LP |
627 | const char *signature = NULL; |
628 | char type = 0; | |
629 | ||
992c052c | 630 | if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) |
ebcf1f97 | 631 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Property '%s' is not writable.", c->member); |
68313d3d | 632 | |
ebcf1f97 LP |
633 | /* Avoid that we call the set routine more than once |
634 | * if the processing of this message got restarted | |
635 | * because the node tree changed. */ | |
636 | if (c->last_iteration == bus->iteration_counter) | |
637 | return 0; | |
992c052c | 638 | |
ebcf1f97 | 639 | c->last_iteration = bus->iteration_counter; |
992c052c | 640 | |
0ca454d4 LP |
641 | r = sd_bus_message_peek_type(m, &type, &signature); |
642 | if (r < 0) | |
643 | return r; | |
644 | ||
645 | if (type != 'v' || !streq(strempty(signature), strempty(c->vtable->x.property.signature))) | |
646 | 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)); | |
647 | ||
ebcf1f97 LP |
648 | r = sd_bus_message_enter_container(m, 'v', c->vtable->x.property.signature); |
649 | if (r < 0) | |
650 | return r; | |
992c052c | 651 | |
adacb957 LP |
652 | r = check_access(bus, m, c, &error); |
653 | if (r < 0) | |
654 | return bus_maybe_reply_error(m, r, &error); | |
655 | ||
19befb2d | 656 | r = invoke_property_set(bus, slot, c->vtable, m->path, c->interface, c->member, m, u, &error); |
ebcf1f97 | 657 | if (r < 0) |
f00c3121 | 658 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 659 | |
68313d3d LP |
660 | if (bus->nodes_modified) |
661 | return 0; | |
662 | ||
992c052c LP |
663 | r = sd_bus_message_exit_container(m); |
664 | if (r < 0) | |
665 | return r; | |
666 | } | |
667 | ||
668 | r = sd_bus_send(bus, reply, NULL); | |
669 | if (r < 0) | |
670 | return r; | |
671 | ||
672 | return 1; | |
673 | } | |
674 | ||
a03e4337 LP |
675 | static int vtable_append_one_property( |
676 | sd_bus *bus, | |
677 | sd_bus_message *reply, | |
678 | const char *path, | |
679 | struct node_vtable *c, | |
680 | const sd_bus_vtable *v, | |
681 | void *userdata, | |
682 | sd_bus_error *error) { | |
683 | ||
19befb2d | 684 | sd_bus_slot *slot; |
a03e4337 LP |
685 | int r; |
686 | ||
687 | assert(bus); | |
688 | assert(reply); | |
689 | assert(path); | |
690 | assert(c); | |
691 | assert(v); | |
692 | ||
693 | r = sd_bus_message_open_container(reply, 'e', "sv"); | |
694 | if (r < 0) | |
695 | return r; | |
696 | ||
697 | r = sd_bus_message_append(reply, "s", v->x.property.member); | |
698 | if (r < 0) | |
699 | return r; | |
700 | ||
701 | r = sd_bus_message_open_container(reply, 'v', v->x.property.signature); | |
702 | if (r < 0) | |
703 | return r; | |
704 | ||
19befb2d LP |
705 | slot = container_of(c, sd_bus_slot, node_vtable); |
706 | ||
707 | r = invoke_property_get(bus, slot, v, path, c->interface, v->x.property.member, reply, vtable_property_convert_userdata(v, userdata), error); | |
a03e4337 LP |
708 | if (r < 0) |
709 | return r; | |
710 | if (bus->nodes_modified) | |
711 | return 0; | |
712 | ||
713 | r = sd_bus_message_close_container(reply); | |
714 | if (r < 0) | |
715 | return r; | |
716 | ||
717 | r = sd_bus_message_close_container(reply); | |
718 | if (r < 0) | |
719 | return r; | |
720 | ||
721 | return 0; | |
722 | } | |
723 | ||
992c052c LP |
724 | static int vtable_append_all_properties( |
725 | sd_bus *bus, | |
726 | sd_bus_message *reply, | |
727 | const char *path, | |
728 | struct node_vtable *c, | |
729 | void *userdata, | |
730 | sd_bus_error *error) { | |
731 | ||
732 | const sd_bus_vtable *v; | |
733 | int r; | |
734 | ||
735 | assert(bus); | |
736 | assert(reply); | |
dfa92725 | 737 | assert(path); |
992c052c LP |
738 | assert(c); |
739 | ||
6e8df5f0 LP |
740 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
741 | return 1; | |
742 | ||
992c052c | 743 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
945c2931 | 744 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
992c052c LP |
745 | continue; |
746 | ||
6e8df5f0 LP |
747 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
748 | continue; | |
749 | ||
33702051 LP |
750 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT) |
751 | continue; | |
752 | ||
a03e4337 | 753 | r = vtable_append_one_property(bus, reply, path, c, v, userdata, error); |
f00c3121 LP |
754 | if (r < 0) |
755 | return r; | |
68313d3d LP |
756 | if (bus->nodes_modified) |
757 | return 0; | |
992c052c LP |
758 | } |
759 | ||
760 | return 1; | |
761 | } | |
762 | ||
763 | static int property_get_all_callbacks_run( | |
764 | sd_bus *bus, | |
765 | sd_bus_message *m, | |
766 | struct node_vtable *first, | |
767 | bool require_fallback, | |
768 | const char *iface, | |
769 | bool *found_object) { | |
770 | ||
4afd3348 | 771 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
992c052c | 772 | struct node_vtable *c; |
bd037038 | 773 | bool found_interface; |
992c052c LP |
774 | int r; |
775 | ||
776 | assert(bus); | |
777 | assert(m); | |
778 | assert(found_object); | |
779 | ||
df2d202e | 780 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
781 | if (r < 0) |
782 | return r; | |
783 | ||
784 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
785 | if (r < 0) | |
786 | return r; | |
787 | ||
38911893 | 788 | found_interface = !iface || |
bd037038 LP |
789 | streq(iface, "org.freedesktop.DBus.Properties") || |
790 | streq(iface, "org.freedesktop.DBus.Peer") || | |
791 | streq(iface, "org.freedesktop.DBus.Introspectable"); | |
792 | ||
992c052c | 793 | LIST_FOREACH(vtables, c, first) { |
4afd3348 | 794 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
795 | void *u; |
796 | ||
797 | if (require_fallback && !c->is_fallback) | |
798 | continue; | |
799 | ||
f00c3121 | 800 | r = node_vtable_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 801 | if (r < 0) |
f00c3121 | 802 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
803 | if (bus->nodes_modified) |
804 | return 0; | |
992c052c LP |
805 | if (r == 0) |
806 | continue; | |
807 | ||
808 | *found_object = true; | |
809 | ||
810 | if (iface && !streq(c->interface, iface)) | |
811 | continue; | |
812 | found_interface = true; | |
813 | ||
992c052c LP |
814 | r = vtable_append_all_properties(bus, reply, m->path, c, u, &error); |
815 | if (r < 0) | |
f00c3121 | 816 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
817 | if (bus->nodes_modified) |
818 | return 0; | |
992c052c LP |
819 | } |
820 | ||
733e792b AJ |
821 | if (!*found_object) |
822 | return 0; | |
823 | ||
992c052c LP |
824 | if (!found_interface) { |
825 | r = sd_bus_reply_method_errorf( | |
df2d202e | 826 | m, |
40ca29a1 | 827 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
828 | "Unknown interface '%s'.", iface); |
829 | if (r < 0) | |
830 | return r; | |
831 | ||
832 | return 1; | |
833 | } | |
834 | ||
835 | r = sd_bus_message_close_container(reply); | |
836 | if (r < 0) | |
837 | return r; | |
838 | ||
839 | r = sd_bus_send(bus, reply, NULL); | |
840 | if (r < 0) | |
841 | return r; | |
842 | ||
843 | return 1; | |
844 | } | |
845 | ||
ff02f101 | 846 | static int bus_node_exists( |
dfa92725 LP |
847 | sd_bus *bus, |
848 | struct node *n, | |
849 | const char *path, | |
850 | bool require_fallback) { | |
851 | ||
992c052c LP |
852 | struct node_vtable *c; |
853 | struct node_callback *k; | |
ff02f101 | 854 | int r; |
992c052c LP |
855 | |
856 | assert(bus); | |
857 | assert(n); | |
dfa92725 | 858 | assert(path); |
992c052c LP |
859 | |
860 | /* Tests if there's anything attached directly to this node | |
861 | * for the specified path */ | |
862 | ||
ff02f101 DH |
863 | if (!require_fallback && (n->enumerators || n->object_managers)) |
864 | return true; | |
865 | ||
992c052c LP |
866 | LIST_FOREACH(callbacks, k, n->callbacks) { |
867 | if (require_fallback && !k->is_fallback) | |
868 | continue; | |
869 | ||
ff02f101 | 870 | return 1; |
992c052c LP |
871 | } |
872 | ||
873 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 874 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
875 | |
876 | if (require_fallback && !c->is_fallback) | |
877 | continue; | |
878 | ||
ff02f101 DH |
879 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
880 | if (r != 0) | |
881 | return r; | |
68313d3d | 882 | if (bus->nodes_modified) |
ff02f101 | 883 | return 0; |
992c052c LP |
884 | } |
885 | ||
ff02f101 | 886 | return 0; |
992c052c LP |
887 | } |
888 | ||
889 | static int process_introspect( | |
890 | sd_bus *bus, | |
891 | sd_bus_message *m, | |
892 | struct node *n, | |
893 | bool require_fallback, | |
894 | bool *found_object) { | |
895 | ||
4afd3348 LP |
896 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
897 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 898 | _cleanup_set_free_free_ Set *s = NULL; |
718db961 | 899 | const char *previous_interface = NULL; |
992c052c LP |
900 | struct introspect intro; |
901 | struct node_vtable *c; | |
902 | bool empty; | |
903 | int r; | |
904 | ||
905 | assert(bus); | |
906 | assert(m); | |
907 | assert(n); | |
908 | assert(found_object); | |
909 | ||
44eb1add | 910 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 911 | if (r < 0) |
f00c3121 | 912 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
913 | if (bus->nodes_modified) |
914 | return 0; | |
992c052c | 915 | |
7fb411f0 | 916 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
917 | if (r < 0) |
918 | return r; | |
919 | ||
943c3f94 | 920 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
921 | if (r < 0) |
922 | return r; | |
923 | ||
924 | empty = set_isempty(s); | |
925 | ||
926 | LIST_FOREACH(vtables, c, n->vtables) { | |
927 | if (require_fallback && !c->is_fallback) | |
928 | continue; | |
929 | ||
f00c3121 LP |
930 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
931 | if (r < 0) { | |
932 | r = bus_maybe_reply_error(m, r, &error); | |
933 | goto finish; | |
934 | } | |
935 | if (bus->nodes_modified) { | |
936 | r = 0; | |
937 | goto finish; | |
938 | } | |
992c052c LP |
939 | if (r == 0) |
940 | continue; | |
941 | ||
942 | empty = false; | |
943 | ||
6e8df5f0 LP |
944 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
945 | continue; | |
946 | ||
718db961 LP |
947 | if (!streq_ptr(previous_interface, c->interface)) { |
948 | ||
949 | if (previous_interface) | |
0d536673 | 950 | fputs(" </interface>\n", intro.f); |
718db961 LP |
951 | |
952 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
953 | } | |
954 | ||
955 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
956 | if (r < 0) |
957 | goto finish; | |
718db961 LP |
958 | |
959 | previous_interface = c->interface; | |
992c052c LP |
960 | } |
961 | ||
718db961 | 962 | if (previous_interface) |
0d536673 | 963 | fputs(" </interface>\n", intro.f); |
718db961 | 964 | |
992c052c LP |
965 | if (empty) { |
966 | /* Nothing?, let's see if we exist at all, and if not | |
967 | * refuse to do anything */ | |
968 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
f2bfc6ba LP |
969 | if (r <= 0) { |
970 | r = bus_maybe_reply_error(m, r, &error); | |
ff02f101 | 971 | goto finish; |
f2bfc6ba | 972 | } |
ff02f101 DH |
973 | if (bus->nodes_modified) { |
974 | r = 0; | |
992c052c | 975 | goto finish; |
ff02f101 | 976 | } |
992c052c LP |
977 | } |
978 | ||
979 | *found_object = true; | |
980 | ||
981 | r = introspect_write_child_nodes(&intro, s, m->path); | |
982 | if (r < 0) | |
983 | goto finish; | |
984 | ||
985 | r = introspect_finish(&intro, bus, m, &reply); | |
986 | if (r < 0) | |
987 | goto finish; | |
988 | ||
989 | r = sd_bus_send(bus, reply, NULL); | |
990 | if (r < 0) | |
991 | goto finish; | |
992 | ||
993 | r = 1; | |
994 | ||
995 | finish: | |
996 | introspect_free(&intro); | |
997 | return r; | |
998 | } | |
999 | ||
992c052c LP |
1000 | static int object_manager_serialize_path( |
1001 | sd_bus *bus, | |
1002 | sd_bus_message *reply, | |
1003 | const char *prefix, | |
1004 | const char *path, | |
1005 | bool require_fallback, | |
1006 | sd_bus_error *error) { | |
1007 | ||
718db961 LP |
1008 | const char *previous_interface = NULL; |
1009 | bool found_something = false; | |
992c052c LP |
1010 | struct node_vtable *i; |
1011 | struct node *n; | |
1012 | int r; | |
1013 | ||
1014 | assert(bus); | |
1015 | assert(reply); | |
1016 | assert(prefix); | |
1017 | assert(path); | |
1018 | assert(error); | |
1019 | ||
1020 | n = hashmap_get(bus->nodes, prefix); | |
1021 | if (!n) | |
1022 | return 0; | |
1023 | ||
992c052c | 1024 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1025 | void *u; |
992c052c LP |
1026 | |
1027 | if (require_fallback && !i->is_fallback) | |
1028 | continue; | |
1029 | ||
f00c3121 | 1030 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1031 | if (r < 0) |
1032 | return r; | |
68313d3d LP |
1033 | if (bus->nodes_modified) |
1034 | return 0; | |
92db139e LP |
1035 | if (r == 0) |
1036 | continue; | |
1037 | ||
1038 | if (!found_something) { | |
718db961 LP |
1039 | |
1040 | /* Open the object part */ | |
1041 | ||
92db139e LP |
1042 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1043 | if (r < 0) | |
1044 | return r; | |
1045 | ||
1046 | r = sd_bus_message_append(reply, "o", path); | |
1047 | if (r < 0) | |
1048 | return r; | |
1049 | ||
1050 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1051 | if (r < 0) | |
1052 | return r; | |
1053 | ||
c0e7906d DH |
1054 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); |
1055 | if (r < 0) | |
1056 | return r; | |
1057 | ||
1058 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
1059 | if (r < 0) | |
1060 | return r; | |
1061 | ||
1062 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
1063 | if (r < 0) | |
1064 | return r; | |
1065 | ||
1066 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
1067 | if (r < 0) | |
1068 | return r; | |
1069 | ||
92db139e LP |
1070 | found_something = true; |
1071 | } | |
1072 | ||
718db961 LP |
1073 | if (!streq_ptr(previous_interface, i->interface)) { |
1074 | ||
1075 | /* Maybe close the previous interface part */ | |
1076 | ||
1077 | if (previous_interface) { | |
1078 | r = sd_bus_message_close_container(reply); | |
1079 | if (r < 0) | |
1080 | return r; | |
1081 | ||
1082 | r = sd_bus_message_close_container(reply); | |
1083 | if (r < 0) | |
1084 | return r; | |
1085 | } | |
1086 | ||
1087 | /* Open the new interface part */ | |
1088 | ||
1089 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1090 | if (r < 0) | |
1091 | return r; | |
1092 | ||
1093 | r = sd_bus_message_append(reply, "s", i->interface); | |
1094 | if (r < 0) | |
1095 | return r; | |
1096 | ||
1097 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1098 | if (r < 0) | |
1099 | return r; | |
1100 | } | |
1101 | ||
1102 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1103 | if (r < 0) |
1104 | return r; | |
68313d3d LP |
1105 | if (bus->nodes_modified) |
1106 | return 0; | |
718db961 LP |
1107 | |
1108 | previous_interface = i->interface; | |
1109 | } | |
1110 | ||
1111 | if (previous_interface) { | |
1112 | r = sd_bus_message_close_container(reply); | |
1113 | if (r < 0) | |
1114 | return r; | |
1115 | ||
1116 | r = sd_bus_message_close_container(reply); | |
1117 | if (r < 0) | |
1118 | return r; | |
992c052c LP |
1119 | } |
1120 | ||
92db139e LP |
1121 | if (found_something) { |
1122 | r = sd_bus_message_close_container(reply); | |
1123 | if (r < 0) | |
1124 | return r; | |
992c052c | 1125 | |
92db139e LP |
1126 | r = sd_bus_message_close_container(reply); |
1127 | if (r < 0) | |
1128 | return r; | |
1129 | } | |
992c052c LP |
1130 | |
1131 | return 1; | |
1132 | } | |
1133 | ||
1134 | static int object_manager_serialize_path_and_fallbacks( | |
1135 | sd_bus *bus, | |
1136 | sd_bus_message *reply, | |
1137 | const char *path, | |
1138 | sd_bus_error *error) { | |
1139 | ||
92e189e5 | 1140 | char *prefix; |
992c052c LP |
1141 | int r; |
1142 | ||
1143 | assert(bus); | |
1144 | assert(reply); | |
1145 | assert(path); | |
1146 | assert(error); | |
1147 | ||
1148 | /* First, add all vtables registered for this path */ | |
1149 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1150 | if (r < 0) | |
1151 | return r; | |
68313d3d LP |
1152 | if (bus->nodes_modified) |
1153 | return 0; | |
992c052c LP |
1154 | |
1155 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1156 | prefix = alloca(strlen(path) + 1); |
1157 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1158 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1159 | if (r < 0) | |
1160 | return r; | |
68313d3d LP |
1161 | if (bus->nodes_modified) |
1162 | return 0; | |
992c052c LP |
1163 | } |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | static int process_get_managed_objects( | |
1169 | sd_bus *bus, | |
1170 | sd_bus_message *m, | |
1171 | struct node *n, | |
1172 | bool require_fallback, | |
1173 | bool *found_object) { | |
1174 | ||
4afd3348 LP |
1175 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1176 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 1177 | _cleanup_set_free_free_ Set *s = NULL; |
943c3f94 DH |
1178 | Iterator i; |
1179 | char *path; | |
992c052c LP |
1180 | int r; |
1181 | ||
1182 | assert(bus); | |
1183 | assert(m); | |
1184 | assert(n); | |
1185 | assert(found_object); | |
1186 | ||
943c3f94 DH |
1187 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1188 | * sub-tree. Therefore, we require a registered object-manager on | |
1189 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1190 | ||
1191 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1192 | return 0; |
1193 | ||
44eb1add | 1194 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c | 1195 | if (r < 0) |
f2bfc6ba | 1196 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
1197 | if (bus->nodes_modified) |
1198 | return 0; | |
992c052c | 1199 | |
df2d202e | 1200 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1201 | if (r < 0) |
1202 | return r; | |
1203 | ||
1204 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1205 | if (r < 0) | |
1206 | return r; | |
1207 | ||
943c3f94 DH |
1208 | SET_FOREACH(path, s, i) { |
1209 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1210 | if (r < 0) | |
f2bfc6ba | 1211 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 1212 | |
943c3f94 | 1213 | if (bus->nodes_modified) |
992c052c | 1214 | return 0; |
992c052c LP |
1215 | } |
1216 | ||
1217 | r = sd_bus_message_close_container(reply); | |
1218 | if (r < 0) | |
1219 | return r; | |
1220 | ||
1221 | r = sd_bus_send(bus, reply, NULL); | |
1222 | if (r < 0) | |
1223 | return r; | |
1224 | ||
1225 | return 1; | |
1226 | } | |
1227 | ||
1228 | static int object_find_and_run( | |
1229 | sd_bus *bus, | |
1230 | sd_bus_message *m, | |
1231 | const char *p, | |
1232 | bool require_fallback, | |
1233 | bool *found_object) { | |
1234 | ||
1235 | struct node *n; | |
1236 | struct vtable_member vtable_key, *v; | |
1237 | int r; | |
1238 | ||
1239 | assert(bus); | |
1240 | assert(m); | |
1241 | assert(p); | |
1242 | assert(found_object); | |
1243 | ||
1244 | n = hashmap_get(bus->nodes, p); | |
1245 | if (!n) | |
1246 | return 0; | |
1247 | ||
1248 | /* First, try object callbacks */ | |
1249 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1250 | if (r != 0) | |
1251 | return r; | |
68313d3d LP |
1252 | if (bus->nodes_modified) |
1253 | return 0; | |
992c052c LP |
1254 | |
1255 | if (!m->interface || !m->member) | |
1256 | return 0; | |
1257 | ||
1258 | /* Then, look for a known method */ | |
1259 | vtable_key.path = (char*) p; | |
1260 | vtable_key.interface = m->interface; | |
1261 | vtable_key.member = m->member; | |
1262 | ||
1263 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1264 | if (v) { | |
1265 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1266 | if (r != 0) | |
1267 | return r; | |
68313d3d LP |
1268 | if (bus->nodes_modified) |
1269 | return 0; | |
992c052c LP |
1270 | } |
1271 | ||
1272 | /* Then, look for a known property */ | |
1273 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1274 | bool get = false; | |
1275 | ||
1276 | get = streq(m->member, "Get"); | |
1277 | ||
1278 | if (get || streq(m->member, "Set")) { | |
1279 | ||
1280 | r = sd_bus_message_rewind(m, true); | |
1281 | if (r < 0) | |
1282 | return r; | |
1283 | ||
1284 | vtable_key.path = (char*) p; | |
1285 | ||
1286 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1287 | if (r < 0) | |
0fc5ab90 | 1288 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1289 | |
1290 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1291 | if (v) { | |
1292 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1293 | if (r != 0) | |
1294 | return r; | |
1295 | } | |
1296 | ||
1297 | } else if (streq(m->member, "GetAll")) { | |
1298 | const char *iface; | |
1299 | ||
1300 | r = sd_bus_message_rewind(m, true); | |
1301 | if (r < 0) | |
1302 | return r; | |
1303 | ||
1304 | r = sd_bus_message_read(m, "s", &iface); | |
1305 | if (r < 0) | |
0fc5ab90 | 1306 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1307 | |
1308 | if (iface[0] == 0) | |
1309 | iface = NULL; | |
1310 | ||
1311 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1312 | if (r != 0) | |
1313 | return r; | |
1314 | } | |
1315 | ||
1316 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1317 | ||
0fc5ab90 LP |
1318 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1319 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1320 | ||
992c052c LP |
1321 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1322 | if (r != 0) | |
1323 | return r; | |
1324 | ||
1325 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1326 | ||
0fc5ab90 LP |
1327 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1328 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1329 | ||
992c052c LP |
1330 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1331 | if (r != 0) | |
1332 | return r; | |
1333 | } | |
1334 | ||
68313d3d LP |
1335 | if (bus->nodes_modified) |
1336 | return 0; | |
1337 | ||
992c052c LP |
1338 | if (!*found_object) { |
1339 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1340 | if (r < 0) | |
f2bfc6ba | 1341 | return bus_maybe_reply_error(m, r, NULL); |
ff02f101 DH |
1342 | if (bus->nodes_modified) |
1343 | return 0; | |
992c052c LP |
1344 | if (r > 0) |
1345 | *found_object = true; | |
1346 | } | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1352 | int r; | |
1353 | size_t pl; | |
1354 | bool found_object = false; | |
1355 | ||
1356 | assert(bus); | |
1357 | assert(m); | |
1358 | ||
c7db1984 | 1359 | if (bus->is_monitor) |
09365592 LP |
1360 | return 0; |
1361 | ||
40ca29a1 | 1362 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1363 | return 0; |
1364 | ||
992c052c LP |
1365 | if (hashmap_isempty(bus->nodes)) |
1366 | return 0; | |
1367 | ||
f820cf99 LP |
1368 | /* Never respond to broadcast messages */ |
1369 | if (bus->bus_client && !m->destination) | |
1370 | return 0; | |
1371 | ||
adacb957 LP |
1372 | assert(m->path); |
1373 | assert(m->member); | |
1374 | ||
992c052c LP |
1375 | pl = strlen(m->path); |
1376 | do { | |
92e189e5 | 1377 | char prefix[pl+1]; |
992c052c LP |
1378 | |
1379 | bus->nodes_modified = false; | |
1380 | ||
1381 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1382 | if (r != 0) | |
1383 | return r; | |
1384 | ||
1385 | /* Look for fallback prefixes */ | |
92e189e5 | 1386 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1387 | |
1388 | if (bus->nodes_modified) | |
1389 | break; | |
1390 | ||
92e189e5 | 1391 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1392 | if (r != 0) |
1393 | return r; | |
1394 | } | |
1395 | ||
1396 | } while (bus->nodes_modified); | |
1397 | ||
1398 | if (!found_object) | |
1399 | return 0; | |
1400 | ||
1401 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1402 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1403 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1404 | m, |
40ca29a1 | 1405 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1406 | "Unknown property or interface."); |
1407 | else | |
1408 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1409 | m, |
40ca29a1 | 1410 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1411 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1412 | ||
1413 | if (r < 0) | |
1414 | return r; | |
1415 | ||
1416 | return 1; | |
1417 | } | |
1418 | ||
1419 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1420 | struct node *n, *parent; | |
1421 | const char *e; | |
2fd069b1 ZJS |
1422 | _cleanup_free_ char *s = NULL; |
1423 | char *p; | |
992c052c LP |
1424 | int r; |
1425 | ||
1426 | assert(bus); | |
1427 | assert(path); | |
1428 | assert(path[0] == '/'); | |
1429 | ||
1430 | n = hashmap_get(bus->nodes, path); | |
1431 | if (n) | |
1432 | return n; | |
1433 | ||
d5099efc | 1434 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1435 | if (r < 0) |
1436 | return NULL; | |
1437 | ||
1438 | s = strdup(path); | |
1439 | if (!s) | |
1440 | return NULL; | |
1441 | ||
1442 | if (streq(path, "/")) | |
1443 | parent = NULL; | |
1444 | else { | |
1445 | e = strrchr(path, '/'); | |
1446 | assert(e); | |
1447 | ||
7d67077f | 1448 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1449 | |
1450 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1451 | if (!parent) |
992c052c | 1452 | return NULL; |
992c052c LP |
1453 | } |
1454 | ||
1455 | n = new0(struct node, 1); | |
1456 | if (!n) | |
1457 | return NULL; | |
1458 | ||
1459 | n->parent = parent; | |
ae2a15bc | 1460 | n->path = TAKE_PTR(s); |
992c052c | 1461 | |
8e050193 | 1462 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1463 | if (r < 0) { |
2fd069b1 | 1464 | free(n->path); |
5fecf46d | 1465 | return mfree(n); |
992c052c LP |
1466 | } |
1467 | ||
1468 | if (parent) | |
71fda00f | 1469 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1470 | |
1471 | return n; | |
1472 | } | |
1473 | ||
19befb2d | 1474 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1475 | assert(b); |
1476 | ||
1477 | if (!n) | |
1478 | return; | |
1479 | ||
1480 | if (n->child || | |
1481 | n->callbacks || | |
1482 | n->vtables || | |
1483 | n->enumerators || | |
19befb2d | 1484 | n->object_managers) |
992c052c LP |
1485 | return; |
1486 | ||
85e55d14 | 1487 | assert_se(hashmap_remove(b->nodes, n->path) == n); |
992c052c LP |
1488 | |
1489 | if (n->parent) | |
71fda00f | 1490 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1491 | |
1492 | free(n->path); | |
1493 | bus_node_gc(b, n->parent); | |
1494 | free(n); | |
1495 | } | |
1496 | ||
2d5c8a27 DH |
1497 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1498 | struct node *n; | |
1499 | ||
1500 | assert(bus); | |
1501 | assert(path); | |
1502 | ||
1503 | n = hashmap_get(bus->nodes, path); | |
1504 | if (!n) { | |
1505 | char *prefix; | |
1506 | ||
1507 | prefix = alloca(strlen(path) + 1); | |
1508 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1509 | n = hashmap_get(bus->nodes, prefix); | |
1510 | if (n) | |
1511 | break; | |
1512 | } | |
1513 | } | |
1514 | ||
1515 | while (n && !n->object_managers) | |
1516 | n = n->parent; | |
1517 | ||
1518 | if (out) | |
1519 | *out = n; | |
1520 | return !!n; | |
1521 | } | |
1522 | ||
992c052c | 1523 | static int bus_add_object( |
dfa92725 | 1524 | sd_bus *bus, |
19befb2d | 1525 | sd_bus_slot **slot, |
992c052c LP |
1526 | bool fallback, |
1527 | const char *path, | |
1528 | sd_bus_message_handler_t callback, | |
1529 | void *userdata) { | |
1530 | ||
19befb2d | 1531 | sd_bus_slot *s; |
992c052c LP |
1532 | struct node *n; |
1533 | int r; | |
1534 | ||
dfa92725 | 1535 | assert_return(bus, -EINVAL); |
45b1f410 | 1536 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1537 | assert_return(object_path_is_valid(path), -EINVAL); |
1538 | assert_return(callback, -EINVAL); | |
1539 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1540 | |
dfa92725 | 1541 | n = bus_node_allocate(bus, path); |
992c052c LP |
1542 | if (!n) |
1543 | return -ENOMEM; | |
1544 | ||
19befb2d LP |
1545 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1546 | if (!s) { | |
992c052c LP |
1547 | r = -ENOMEM; |
1548 | goto fail; | |
1549 | } | |
1550 | ||
19befb2d LP |
1551 | s->node_callback.callback = callback; |
1552 | s->node_callback.is_fallback = fallback; | |
992c052c | 1553 | |
19befb2d LP |
1554 | s->node_callback.node = n; |
1555 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1556 | bus->nodes_modified = true; |
1557 | ||
19befb2d LP |
1558 | if (slot) |
1559 | *slot = s; | |
1560 | ||
992c052c LP |
1561 | return 0; |
1562 | ||
1563 | fail: | |
19befb2d | 1564 | sd_bus_slot_unref(s); |
dfa92725 | 1565 | bus_node_gc(bus, n); |
19befb2d | 1566 | |
992c052c LP |
1567 | return r; |
1568 | } | |
1569 | ||
19befb2d | 1570 | _public_ int sd_bus_add_object( |
992c052c | 1571 | sd_bus *bus, |
19befb2d | 1572 | sd_bus_slot **slot, |
992c052c LP |
1573 | const char *path, |
1574 | sd_bus_message_handler_t callback, | |
1575 | void *userdata) { | |
1576 | ||
19befb2d | 1577 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1578 | } |
1579 | ||
19befb2d LP |
1580 | _public_ int sd_bus_add_fallback( |
1581 | sd_bus *bus, | |
1582 | sd_bus_slot **slot, | |
1583 | const char *prefix, | |
1584 | sd_bus_message_handler_t callback, | |
1585 | void *userdata) { | |
992c052c | 1586 | |
19befb2d | 1587 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1588 | } |
1589 | ||
b826ab58 | 1590 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1591 | const struct vtable_member *m = a; |
1592 | ||
dfa92725 LP |
1593 | assert(m); |
1594 | ||
b826ab58 TG |
1595 | string_hash_func(m->path, state); |
1596 | string_hash_func(m->interface, state); | |
1597 | string_hash_func(m->member, state); | |
992c052c LP |
1598 | } |
1599 | ||
1600 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1601 | const struct vtable_member *x = a, *y = b; | |
1602 | int r; | |
1603 | ||
dfa92725 LP |
1604 | assert(x); |
1605 | assert(y); | |
1606 | ||
992c052c LP |
1607 | r = strcmp(x->path, y->path); |
1608 | if (r != 0) | |
1609 | return r; | |
1610 | ||
1611 | r = strcmp(x->interface, y->interface); | |
1612 | if (r != 0) | |
1613 | return r; | |
1614 | ||
1615 | return strcmp(x->member, y->member); | |
1616 | } | |
1617 | ||
d5099efc MS |
1618 | static const struct hash_ops vtable_member_hash_ops = { |
1619 | .hash = vtable_member_hash_func, | |
1620 | .compare = vtable_member_compare_func | |
1621 | }; | |
1622 | ||
992c052c LP |
1623 | static int add_object_vtable_internal( |
1624 | sd_bus *bus, | |
19befb2d | 1625 | sd_bus_slot **slot, |
992c052c LP |
1626 | const char *path, |
1627 | const char *interface, | |
1628 | const sd_bus_vtable *vtable, | |
1629 | bool fallback, | |
1630 | sd_bus_object_find_t find, | |
1631 | void *userdata) { | |
1632 | ||
2915234d | 1633 | sd_bus_slot *s = NULL; |
19befb2d | 1634 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1635 | const sd_bus_vtable *v; |
1636 | struct node *n; | |
1637 | int r; | |
1638 | ||
dfa92725 | 1639 | assert_return(bus, -EINVAL); |
45b1f410 | 1640 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1641 | assert_return(object_path_is_valid(path), -EINVAL); |
1642 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1643 | assert_return(vtable, -EINVAL); | |
1644 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1645 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1646 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1647 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1648 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1649 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1650 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1651 | |
d5099efc | 1652 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1653 | if (r < 0) |
1654 | return r; | |
1655 | ||
d5099efc | 1656 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1657 | if (r < 0) |
1658 | return r; | |
1659 | ||
1660 | n = bus_node_allocate(bus, path); | |
1661 | if (!n) | |
1662 | return -ENOMEM; | |
1663 | ||
1664 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1665 | if (i->is_fallback != fallback) { |
1666 | r = -EPROTOTYPE; | |
1667 | goto fail; | |
1668 | } | |
718db961 LP |
1669 | |
1670 | if (streq(i->interface, interface)) { | |
1671 | ||
1672 | if (i->vtable == vtable) { | |
1673 | r = -EEXIST; | |
1674 | goto fail; | |
1675 | } | |
1676 | ||
1677 | existing = i; | |
1678 | } | |
992c052c LP |
1679 | } |
1680 | ||
19befb2d LP |
1681 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1682 | if (!s) { | |
992c052c LP |
1683 | r = -ENOMEM; |
1684 | goto fail; | |
1685 | } | |
1686 | ||
19befb2d LP |
1687 | s->node_vtable.is_fallback = fallback; |
1688 | s->node_vtable.vtable = vtable; | |
1689 | s->node_vtable.find = find; | |
992c052c | 1690 | |
19befb2d LP |
1691 | s->node_vtable.interface = strdup(interface); |
1692 | if (!s->node_vtable.interface) { | |
992c052c LP |
1693 | r = -ENOMEM; |
1694 | goto fail; | |
1695 | } | |
1696 | ||
19befb2d | 1697 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1698 | |
1699 | switch (v->type) { | |
1700 | ||
1701 | case _SD_BUS_VTABLE_METHOD: { | |
1702 | struct vtable_member *m; | |
1703 | ||
77a874a3 LP |
1704 | if (!member_name_is_valid(v->x.method.member) || |
1705 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1706 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1707 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1708 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1709 | r = -EINVAL; |
1710 | goto fail; | |
1711 | } | |
1712 | ||
1713 | m = new0(struct vtable_member, 1); | |
1714 | if (!m) { | |
1715 | r = -ENOMEM; | |
1716 | goto fail; | |
1717 | } | |
1718 | ||
19befb2d | 1719 | m->parent = &s->node_vtable; |
992c052c | 1720 | m->path = n->path; |
19befb2d | 1721 | m->interface = s->node_vtable.interface; |
77a874a3 | 1722 | m->member = v->x.method.member; |
992c052c LP |
1723 | m->vtable = v; |
1724 | ||
1725 | r = hashmap_put(bus->vtable_methods, m, m); | |
1726 | if (r < 0) { | |
1727 | free(m); | |
1728 | goto fail; | |
1729 | } | |
1730 | ||
1731 | break; | |
1732 | } | |
1733 | ||
1734 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1735 | ||
77a874a3 | 1736 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1737 | r = -EINVAL; |
1738 | goto fail; | |
1739 | } | |
9b772efb LP |
1740 | |
1741 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1742 | r = -EINVAL; | |
1743 | goto fail; | |
1744 | } | |
992c052c | 1745 | |
4831981d | 1746 | _fallthrough_; |
992c052c LP |
1747 | case _SD_BUS_VTABLE_PROPERTY: { |
1748 | struct vtable_member *m; | |
1749 | ||
77a874a3 LP |
1750 | if (!member_name_is_valid(v->x.property.member) || |
1751 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1752 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1753 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1754 | (!!(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 | 1755 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1756 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1757 | r = -EINVAL; |
1758 | goto fail; | |
1759 | } | |
1760 | ||
992c052c LP |
1761 | m = new0(struct vtable_member, 1); |
1762 | if (!m) { | |
1763 | r = -ENOMEM; | |
1764 | goto fail; | |
1765 | } | |
1766 | ||
19befb2d | 1767 | m->parent = &s->node_vtable; |
992c052c | 1768 | m->path = n->path; |
19befb2d | 1769 | m->interface = s->node_vtable.interface; |
77a874a3 | 1770 | m->member = v->x.property.member; |
992c052c LP |
1771 | m->vtable = v; |
1772 | ||
1773 | r = hashmap_put(bus->vtable_properties, m, m); | |
1774 | if (r < 0) { | |
1775 | free(m); | |
1776 | goto fail; | |
1777 | } | |
1778 | ||
1779 | break; | |
1780 | } | |
1781 | ||
1782 | case _SD_BUS_VTABLE_SIGNAL: | |
1783 | ||
77a874a3 | 1784 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1785 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1786 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1787 | r = -EINVAL; |
1788 | goto fail; | |
1789 | } | |
1790 | ||
1791 | break; | |
1792 | ||
1793 | default: | |
1794 | r = -EINVAL; | |
1795 | goto fail; | |
1796 | } | |
1797 | } | |
1798 | ||
19befb2d LP |
1799 | s->node_vtable.node = n; |
1800 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1801 | bus->nodes_modified = true; |
1802 | ||
19befb2d LP |
1803 | if (slot) |
1804 | *slot = s; | |
1805 | ||
992c052c LP |
1806 | return 0; |
1807 | ||
1808 | fail: | |
19befb2d | 1809 | sd_bus_slot_unref(s); |
dfa92725 LP |
1810 | bus_node_gc(bus, n); |
1811 | ||
19befb2d | 1812 | return r; |
992c052c LP |
1813 | } |
1814 | ||
d9f644e2 | 1815 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1816 | sd_bus *bus, |
19befb2d | 1817 | sd_bus_slot **slot, |
992c052c LP |
1818 | const char *path, |
1819 | const char *interface, | |
1820 | const sd_bus_vtable *vtable, | |
1821 | void *userdata) { | |
1822 | ||
19befb2d | 1823 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1824 | } |
1825 | ||
d9f644e2 | 1826 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1827 | sd_bus *bus, |
19befb2d LP |
1828 | sd_bus_slot **slot, |
1829 | const char *prefix, | |
718db961 LP |
1830 | const char *interface, |
1831 | const sd_bus_vtable *vtable, | |
1832 | sd_bus_object_find_t find, | |
1833 | void *userdata) { | |
992c052c | 1834 | |
19befb2d | 1835 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1836 | } |
1837 | ||
d9f644e2 | 1838 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1839 | sd_bus *bus, |
19befb2d | 1840 | sd_bus_slot **slot, |
992c052c LP |
1841 | const char *path, |
1842 | sd_bus_node_enumerator_t callback, | |
1843 | void *userdata) { | |
1844 | ||
19befb2d | 1845 | sd_bus_slot *s; |
992c052c LP |
1846 | struct node *n; |
1847 | int r; | |
1848 | ||
dfa92725 | 1849 | assert_return(bus, -EINVAL); |
45b1f410 | 1850 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1851 | assert_return(object_path_is_valid(path), -EINVAL); |
1852 | assert_return(callback, -EINVAL); | |
1853 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1854 | |
1855 | n = bus_node_allocate(bus, path); | |
1856 | if (!n) | |
1857 | return -ENOMEM; | |
1858 | ||
19befb2d LP |
1859 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1860 | if (!s) { | |
992c052c LP |
1861 | r = -ENOMEM; |
1862 | goto fail; | |
1863 | } | |
1864 | ||
19befb2d | 1865 | s->node_enumerator.callback = callback; |
68313d3d | 1866 | |
19befb2d LP |
1867 | s->node_enumerator.node = n; |
1868 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1869 | bus->nodes_modified = true; |
1870 | ||
19befb2d LP |
1871 | if (slot) |
1872 | *slot = s; | |
1873 | ||
992c052c LP |
1874 | return 0; |
1875 | ||
1876 | fail: | |
19befb2d | 1877 | sd_bus_slot_unref(s); |
992c052c LP |
1878 | bus_node_gc(bus, n); |
1879 | ||
19befb2d | 1880 | return r; |
992c052c LP |
1881 | } |
1882 | ||
1883 | static int emit_properties_changed_on_interface( | |
1884 | sd_bus *bus, | |
1885 | const char *prefix, | |
1886 | const char *path, | |
1887 | const char *interface, | |
1888 | bool require_fallback, | |
46525bfc | 1889 | bool *found_interface, |
992c052c LP |
1890 | char **names) { |
1891 | ||
4afd3348 LP |
1892 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1893 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
718db961 LP |
1894 | bool has_invalidating = false, has_changing = false; |
1895 | struct vtable_member key = {}; | |
992c052c LP |
1896 | struct node_vtable *c; |
1897 | struct node *n; | |
1898 | char **property; | |
1899 | void *u = NULL; | |
1900 | int r; | |
1901 | ||
1902 | assert(bus); | |
dfa92725 | 1903 | assert(prefix); |
992c052c LP |
1904 | assert(path); |
1905 | assert(interface); | |
46525bfc | 1906 | assert(found_interface); |
992c052c LP |
1907 | |
1908 | n = hashmap_get(bus->nodes, prefix); | |
1909 | if (!n) | |
1910 | return 0; | |
1911 | ||
151b9b96 | 1912 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1913 | if (r < 0) |
1914 | return r; | |
1915 | ||
1916 | r = sd_bus_message_append(m, "s", interface); | |
1917 | if (r < 0) | |
1918 | return r; | |
1919 | ||
1920 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1921 | if (r < 0) | |
1922 | return r; | |
1923 | ||
1924 | key.path = prefix; | |
1925 | key.interface = interface; | |
1926 | ||
718db961 LP |
1927 | LIST_FOREACH(vtables, c, n->vtables) { |
1928 | if (require_fallback && !c->is_fallback) | |
1929 | continue; | |
992c052c | 1930 | |
718db961 | 1931 | if (!streq(c->interface, interface)) |
992c052c | 1932 | continue; |
992c052c | 1933 | |
f00c3121 | 1934 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1935 | if (r < 0) |
1936 | return r; | |
718db961 LP |
1937 | if (bus->nodes_modified) |
1938 | return 0; | |
1939 | if (r == 0) | |
1940 | continue; | |
992c052c | 1941 | |
46525bfc LP |
1942 | *found_interface = true; |
1943 | ||
a03e4337 LP |
1944 | if (names) { |
1945 | /* If the caller specified a list of | |
1946 | * properties we include exactly those in the | |
1947 | * PropertiesChanged message */ | |
992c052c | 1948 | |
a03e4337 LP |
1949 | STRV_FOREACH(property, names) { |
1950 | struct vtable_member *v; | |
992c052c | 1951 | |
a03e4337 | 1952 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1953 | |
a03e4337 LP |
1954 | key.member = *property; |
1955 | v = hashmap_get(bus->vtable_properties, &key); | |
1956 | if (!v) | |
1957 | return -ENOENT; | |
1958 | ||
1959 | /* If there are two vtables for the same | |
1960 | * interface, let's handle this property when | |
1961 | * we come to that vtable. */ | |
1962 | if (c != v->parent) | |
1963 | continue; | |
992c052c | 1964 | |
a03e4337 LP |
1965 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1966 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1967 | |
a03e4337 LP |
1968 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1969 | ||
1970 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1971 | has_invalidating = true; | |
1972 | continue; | |
1973 | } | |
1974 | ||
1975 | has_changing = true; | |
1976 | ||
1977 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1978 | if (r < 0) | |
1979 | return r; | |
1980 | if (bus->nodes_modified) | |
1981 | return 0; | |
718db961 | 1982 | } |
a03e4337 LP |
1983 | } else { |
1984 | const sd_bus_vtable *v; | |
718db961 | 1985 | |
a03e4337 LP |
1986 | /* If the caller specified no properties list |
1987 | * we include all properties that are marked | |
1988 | * as changing in the message. */ | |
718db961 | 1989 | |
a03e4337 | 1990 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
945c2931 | 1991 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
a03e4337 | 1992 | continue; |
718db961 | 1993 | |
a03e4337 LP |
1994 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
1995 | continue; | |
718db961 | 1996 | |
a03e4337 LP |
1997 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
1998 | has_invalidating = true; | |
1999 | continue; | |
2000 | } | |
718db961 | 2001 | |
a03e4337 LP |
2002 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
2003 | continue; | |
718db961 | 2004 | |
a03e4337 | 2005 | has_changing = true; |
718db961 | 2006 | |
a03e4337 LP |
2007 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
2008 | if (r < 0) | |
2009 | return r; | |
2010 | if (bus->nodes_modified) | |
2011 | return 0; | |
2012 | } | |
718db961 | 2013 | } |
992c052c LP |
2014 | } |
2015 | ||
718db961 LP |
2016 | if (!has_invalidating && !has_changing) |
2017 | return 0; | |
2018 | ||
992c052c LP |
2019 | r = sd_bus_message_close_container(m); |
2020 | if (r < 0) | |
2021 | return r; | |
2022 | ||
2023 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2024 | if (r < 0) | |
2025 | return r; | |
2026 | ||
2027 | if (has_invalidating) { | |
718db961 LP |
2028 | LIST_FOREACH(vtables, c, n->vtables) { |
2029 | if (require_fallback && !c->is_fallback) | |
2030 | continue; | |
992c052c | 2031 | |
718db961 | 2032 | if (!streq(c->interface, interface)) |
992c052c LP |
2033 | continue; |
2034 | ||
f00c3121 | 2035 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2036 | if (r < 0) |
2037 | return r; | |
718db961 LP |
2038 | if (bus->nodes_modified) |
2039 | return 0; | |
2040 | if (r == 0) | |
2041 | continue; | |
2042 | ||
a03e4337 LP |
2043 | if (names) { |
2044 | STRV_FOREACH(property, names) { | |
2045 | struct vtable_member *v; | |
718db961 | 2046 | |
a03e4337 LP |
2047 | key.member = *property; |
2048 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2049 | assert(c == v->parent); | |
718db961 | 2050 | |
a03e4337 LP |
2051 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2052 | continue; | |
718db961 | 2053 | |
a03e4337 LP |
2054 | r = sd_bus_message_append(m, "s", *property); |
2055 | if (r < 0) | |
2056 | return r; | |
2057 | } | |
2058 | } else { | |
2059 | const sd_bus_vtable *v; | |
2060 | ||
2061 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
945c2931 | 2062 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
a03e4337 LP |
2063 | continue; |
2064 | ||
2065 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2066 | continue; | |
2067 | ||
2068 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2069 | continue; | |
2070 | ||
2071 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2072 | if (r < 0) | |
2073 | return r; | |
2074 | } | |
718db961 | 2075 | } |
992c052c LP |
2076 | } |
2077 | } | |
2078 | ||
2079 | r = sd_bus_message_close_container(m); | |
2080 | if (r < 0) | |
2081 | return r; | |
2082 | ||
2083 | r = sd_bus_send(bus, m, NULL); | |
2084 | if (r < 0) | |
2085 | return r; | |
2086 | ||
2087 | return 1; | |
2088 | } | |
2089 | ||
d9f644e2 | 2090 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2091 | sd_bus *bus, |
2092 | const char *path, | |
2093 | const char *interface, | |
2094 | char **names) { | |
2095 | ||
8ce2afd6 | 2096 | BUS_DONT_DESTROY(bus); |
46525bfc | 2097 | bool found_interface = false; |
92e189e5 | 2098 | char *prefix; |
992c052c LP |
2099 | int r; |
2100 | ||
dfa92725 | 2101 | assert_return(bus, -EINVAL); |
45b1f410 | 2102 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2103 | assert_return(object_path_is_valid(path), -EINVAL); |
2104 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2105 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2106 | ||
a3d59cd1 LP |
2107 | if (!BUS_IS_OPEN(bus->state)) |
2108 | return -ENOTCONN; | |
a03e4337 LP |
2109 | |
2110 | /* A non-NULL but empty names list means nothing needs to be | |
2111 | generated. A NULL list OTOH indicates that all properties | |
2112 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2113 | included in the PropertiesChanged message. */ | |
2114 | if (names && names[0] == NULL) | |
dfa92725 | 2115 | return 0; |
992c052c | 2116 | |
68313d3d LP |
2117 | do { |
2118 | bus->nodes_modified = false; | |
992c052c | 2119 | |
46525bfc | 2120 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2121 | if (r != 0) |
2122 | return r; | |
68313d3d LP |
2123 | if (bus->nodes_modified) |
2124 | continue; | |
2125 | ||
2126 | prefix = alloca(strlen(path) + 1); | |
2127 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2128 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2129 | if (r != 0) |
2130 | return r; | |
2131 | if (bus->nodes_modified) | |
2132 | break; | |
2133 | } | |
2134 | ||
2135 | } while (bus->nodes_modified); | |
992c052c | 2136 | |
46525bfc | 2137 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2138 | } |
2139 | ||
d9f644e2 | 2140 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2141 | sd_bus *bus, |
2142 | const char *path, | |
2143 | const char *interface, | |
2144 | const char *name, ...) { | |
2145 | ||
250a918d | 2146 | char **names; |
992c052c | 2147 | |
dfa92725 | 2148 | assert_return(bus, -EINVAL); |
45b1f410 | 2149 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2150 | assert_return(object_path_is_valid(path), -EINVAL); |
2151 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2152 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2153 | ||
a3d59cd1 LP |
2154 | if (!BUS_IS_OPEN(bus->state)) |
2155 | return -ENOTCONN; | |
2156 | ||
dfa92725 LP |
2157 | if (!name) |
2158 | return 0; | |
2159 | ||
250a918d | 2160 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2161 | |
2162 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2163 | } | |
2164 | ||
d95eb43e DH |
2165 | static int object_added_append_all_prefix( |
2166 | sd_bus *bus, | |
2167 | sd_bus_message *m, | |
2168 | Set *s, | |
2169 | const char *prefix, | |
2170 | const char *path, | |
2171 | bool require_fallback) { | |
2172 | ||
2173 | const char *previous_interface = NULL; | |
2174 | struct node_vtable *c; | |
2175 | struct node *n; | |
2176 | int r; | |
2177 | ||
2178 | assert(bus); | |
2179 | assert(m); | |
2180 | assert(s); | |
2181 | assert(prefix); | |
2182 | assert(path); | |
2183 | ||
2184 | n = hashmap_get(bus->nodes, prefix); | |
2185 | if (!n) | |
2186 | return 0; | |
2187 | ||
2188 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2189 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2190 | void *u = NULL; |
2191 | ||
2192 | if (require_fallback && !c->is_fallback) | |
2193 | continue; | |
2194 | ||
2195 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2196 | if (r < 0) | |
2197 | return r; | |
2198 | if (bus->nodes_modified) | |
2199 | return 0; | |
2200 | if (r == 0) | |
2201 | continue; | |
2202 | ||
2203 | if (!streq_ptr(c->interface, previous_interface)) { | |
2204 | /* If a child-node already handled this interface, we | |
2205 | * skip it on any of its parents. The child vtables | |
2206 | * always fully override any conflicting vtables of | |
2207 | * any parent node. */ | |
2208 | if (set_get(s, c->interface)) | |
2209 | continue; | |
2210 | ||
2211 | r = set_put(s, c->interface); | |
2212 | if (r < 0) | |
2213 | return r; | |
2214 | ||
2215 | if (previous_interface) { | |
2216 | r = sd_bus_message_close_container(m); | |
2217 | if (r < 0) | |
2218 | return r; | |
2219 | r = sd_bus_message_close_container(m); | |
2220 | if (r < 0) | |
2221 | return r; | |
2222 | } | |
2223 | ||
2224 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2225 | if (r < 0) | |
2226 | return r; | |
2227 | r = sd_bus_message_append(m, "s", c->interface); | |
2228 | if (r < 0) | |
2229 | return r; | |
2230 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2231 | if (r < 0) | |
2232 | return r; | |
2233 | ||
2234 | previous_interface = c->interface; | |
2235 | } | |
2236 | ||
2237 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2238 | if (r < 0) | |
2239 | return r; | |
2240 | if (bus->nodes_modified) | |
2241 | return 0; | |
2242 | } | |
2243 | ||
2244 | if (previous_interface) { | |
2245 | r = sd_bus_message_close_container(m); | |
2246 | if (r < 0) | |
2247 | return r; | |
2248 | r = sd_bus_message_close_container(m); | |
2249 | if (r < 0) | |
2250 | return r; | |
2251 | } | |
2252 | ||
2253 | return 0; | |
2254 | } | |
2255 | ||
2256 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2257 | _cleanup_set_free_ Set *s = NULL; | |
2258 | char *prefix; | |
2259 | int r; | |
2260 | ||
2261 | assert(bus); | |
2262 | assert(m); | |
2263 | assert(path); | |
2264 | ||
2265 | /* | |
2266 | * This appends all interfaces registered on path @path. We first add | |
2267 | * the builtin interfaces, which are always available and handled by | |
2268 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2269 | * followed by all fallback interfaces registered on any parent prefix. | |
2270 | * | |
2271 | * If an interface is registered multiple times on the same node with | |
2272 | * different vtables, we merge all the properties across all vtables. | |
2273 | * However, if a child node has the same interface registered as one of | |
2274 | * its parent nodes has as fallback, we make the child overwrite the | |
2275 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2276 | * handled interfaces during parent traversal, so we skip interfaces on | |
2277 | * a parent that were overwritten by a child. | |
2278 | */ | |
2279 | ||
2280 | s = set_new(&string_hash_ops); | |
2281 | if (!s) | |
2282 | return -ENOMEM; | |
2283 | ||
2284 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2285 | if (r < 0) | |
2286 | return r; | |
2287 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2288 | if (r < 0) | |
2289 | return r; | |
2290 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2291 | if (r < 0) | |
2292 | return r; | |
2293 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2294 | if (r < 0) | |
2295 | return r; | |
2296 | ||
2297 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2298 | if (r < 0) | |
2299 | return r; | |
2300 | if (bus->nodes_modified) | |
2301 | return 0; | |
2302 | ||
2303 | prefix = alloca(strlen(path) + 1); | |
2304 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2305 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2306 | if (r < 0) | |
2307 | return r; | |
2308 | if (bus->nodes_modified) | |
2309 | return 0; | |
2310 | } | |
2311 | ||
2312 | return 0; | |
2313 | } | |
2314 | ||
969a9685 | 2315 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2316 | BUS_DONT_DESTROY(bus); |
2317 | ||
4afd3348 | 2318 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2319 | struct node *object_manager; |
d95eb43e DH |
2320 | int r; |
2321 | ||
2322 | /* | |
2323 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2324 | * all registered vtables and fallback vtables on the path. All | |
2325 | * properties are queried and included in the signal. | |
2326 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2327 | * explicit list of registered interfaces. However, unlike | |
2328 | * interfaces_added(), this call can figure out the list of supported | |
2329 | * interfaces itself. Furthermore, it properly adds the builtin | |
2330 | * org.freedesktop.DBus.* interfaces. | |
2331 | */ | |
2332 | ||
2333 | assert_return(bus, -EINVAL); | |
45b1f410 | 2334 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d95eb43e DH |
2335 | assert_return(object_path_is_valid(path), -EINVAL); |
2336 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2337 | ||
2338 | if (!BUS_IS_OPEN(bus->state)) | |
2339 | return -ENOTCONN; | |
2340 | ||
2d5c8a27 DH |
2341 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2342 | if (r < 0) | |
2343 | return r; | |
2344 | if (r == 0) | |
2345 | return -ESRCH; | |
2346 | ||
d95eb43e DH |
2347 | do { |
2348 | bus->nodes_modified = false; | |
2349 | m = sd_bus_message_unref(m); | |
2350 | ||
2d5c8a27 | 2351 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2352 | if (r < 0) |
2353 | return r; | |
2354 | ||
2355 | r = sd_bus_message_append_basic(m, 'o', path); | |
2356 | if (r < 0) | |
2357 | return r; | |
2358 | ||
2359 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2360 | if (r < 0) | |
2361 | return r; | |
2362 | ||
2363 | r = object_added_append_all(bus, m, path); | |
2364 | if (r < 0) | |
2365 | return r; | |
2366 | ||
2367 | if (bus->nodes_modified) | |
2368 | continue; | |
2369 | ||
2370 | r = sd_bus_message_close_container(m); | |
2371 | if (r < 0) | |
2372 | return r; | |
2373 | ||
2374 | } while (bus->nodes_modified); | |
2375 | ||
2376 | return sd_bus_send(bus, m, NULL); | |
2377 | } | |
2378 | ||
2379 | static int object_removed_append_all_prefix( | |
2380 | sd_bus *bus, | |
2381 | sd_bus_message *m, | |
2382 | Set *s, | |
2383 | const char *prefix, | |
2384 | const char *path, | |
2385 | bool require_fallback) { | |
2386 | ||
2387 | const char *previous_interface = NULL; | |
2388 | struct node_vtable *c; | |
2389 | struct node *n; | |
2390 | int r; | |
2391 | ||
2392 | assert(bus); | |
2393 | assert(m); | |
2394 | assert(s); | |
2395 | assert(prefix); | |
2396 | assert(path); | |
2397 | ||
2398 | n = hashmap_get(bus->nodes, prefix); | |
2399 | if (!n) | |
2400 | return 0; | |
2401 | ||
2402 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2403 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2404 | void *u = NULL; |
2405 | ||
2406 | if (require_fallback && !c->is_fallback) | |
2407 | continue; | |
2408 | if (streq_ptr(c->interface, previous_interface)) | |
2409 | continue; | |
2410 | ||
2411 | /* If a child-node already handled this interface, we | |
2412 | * skip it on any of its parents. The child vtables | |
2413 | * always fully override any conflicting vtables of | |
2414 | * any parent node. */ | |
2415 | if (set_get(s, c->interface)) | |
2416 | continue; | |
2417 | ||
2418 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2419 | if (r < 0) | |
2420 | return r; | |
2421 | if (bus->nodes_modified) | |
2422 | return 0; | |
2423 | if (r == 0) | |
2424 | continue; | |
2425 | ||
2426 | r = set_put(s, c->interface); | |
2427 | if (r < 0) | |
2428 | return r; | |
2429 | ||
2430 | r = sd_bus_message_append(m, "s", c->interface); | |
2431 | if (r < 0) | |
2432 | return r; | |
2433 | ||
2434 | previous_interface = c->interface; | |
2435 | } | |
2436 | ||
2437 | return 0; | |
2438 | } | |
2439 | ||
2440 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2441 | _cleanup_set_free_ Set *s = NULL; | |
2442 | char *prefix; | |
2443 | int r; | |
2444 | ||
2445 | assert(bus); | |
2446 | assert(m); | |
2447 | assert(path); | |
2448 | ||
2449 | /* see sd_bus_emit_object_added() for details */ | |
2450 | ||
2451 | s = set_new(&string_hash_ops); | |
2452 | if (!s) | |
2453 | return -ENOMEM; | |
2454 | ||
2455 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2456 | if (r < 0) | |
2457 | return r; | |
2458 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2459 | if (r < 0) | |
2460 | return r; | |
2461 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2462 | if (r < 0) | |
2463 | return r; | |
2464 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2465 | if (r < 0) | |
2466 | return r; | |
2467 | ||
2468 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2469 | if (r < 0) | |
2470 | return r; | |
2471 | if (bus->nodes_modified) | |
2472 | return 0; | |
2473 | ||
2474 | prefix = alloca(strlen(path) + 1); | |
2475 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2476 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2477 | if (r < 0) | |
2478 | return r; | |
2479 | if (bus->nodes_modified) | |
2480 | return 0; | |
2481 | } | |
2482 | ||
2483 | return 0; | |
2484 | } | |
2485 | ||
969a9685 | 2486 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2487 | BUS_DONT_DESTROY(bus); |
2488 | ||
4afd3348 | 2489 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2490 | struct node *object_manager; |
d95eb43e DH |
2491 | int r; |
2492 | ||
2493 | /* | |
2494 | * This is like sd_bus_emit_object_added(), but emits an | |
2495 | * InterfacesRemoved signal on the given path. This only includes any | |
2496 | * registered interfaces but skips the properties. Note that this will | |
2497 | * call into the find() callbacks of any registered vtable. Therefore, | |
2498 | * you must call this function before destroying/unlinking your object. | |
2499 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2500 | * that this will *NOT* call into any property callback. Therefore, the | |
2501 | * object might be in an "destructed" state, as long as we can find it. | |
2502 | */ | |
2503 | ||
2504 | assert_return(bus, -EINVAL); | |
45b1f410 | 2505 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d95eb43e DH |
2506 | assert_return(object_path_is_valid(path), -EINVAL); |
2507 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2508 | ||
2509 | if (!BUS_IS_OPEN(bus->state)) | |
2510 | return -ENOTCONN; | |
2511 | ||
2d5c8a27 DH |
2512 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2513 | if (r < 0) | |
2514 | return r; | |
2515 | if (r == 0) | |
2516 | return -ESRCH; | |
2517 | ||
d95eb43e DH |
2518 | do { |
2519 | bus->nodes_modified = false; | |
2520 | m = sd_bus_message_unref(m); | |
2521 | ||
2d5c8a27 | 2522 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2523 | if (r < 0) |
2524 | return r; | |
2525 | ||
2526 | r = sd_bus_message_append_basic(m, 'o', path); | |
2527 | if (r < 0) | |
2528 | return r; | |
2529 | ||
2530 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2531 | if (r < 0) | |
2532 | return r; | |
2533 | ||
2534 | r = object_removed_append_all(bus, m, path); | |
2535 | if (r < 0) | |
2536 | return r; | |
2537 | ||
2538 | if (bus->nodes_modified) | |
2539 | continue; | |
2540 | ||
2541 | r = sd_bus_message_close_container(m); | |
2542 | if (r < 0) | |
2543 | return r; | |
2544 | ||
2545 | } while (bus->nodes_modified); | |
2546 | ||
2547 | return sd_bus_send(bus, m, NULL); | |
2548 | } | |
2549 | ||
4be39163 LP |
2550 | static int interfaces_added_append_one_prefix( |
2551 | sd_bus *bus, | |
2552 | sd_bus_message *m, | |
2553 | const char *prefix, | |
2554 | const char *path, | |
2555 | const char *interface, | |
2556 | bool require_fallback) { | |
2557 | ||
4afd3348 | 2558 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
718db961 | 2559 | bool found_interface = false; |
4be39163 LP |
2560 | struct node_vtable *c; |
2561 | struct node *n; | |
2562 | void *u = NULL; | |
2563 | int r; | |
2564 | ||
2565 | assert(bus); | |
2566 | assert(m); | |
2567 | assert(prefix); | |
2568 | assert(path); | |
2569 | assert(interface); | |
2570 | ||
2571 | n = hashmap_get(bus->nodes, prefix); | |
2572 | if (!n) | |
2573 | return 0; | |
2574 | ||
2575 | LIST_FOREACH(vtables, c, n->vtables) { | |
2576 | if (require_fallback && !c->is_fallback) | |
2577 | continue; | |
2578 | ||
718db961 LP |
2579 | if (!streq(c->interface, interface)) |
2580 | continue; | |
4be39163 | 2581 | |
f00c3121 | 2582 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2583 | if (r < 0) |
2584 | return r; | |
2585 | if (bus->nodes_modified) | |
2586 | return 0; | |
2587 | if (r == 0) | |
2588 | continue; | |
4be39163 | 2589 | |
718db961 LP |
2590 | if (!found_interface) { |
2591 | r = sd_bus_message_append_basic(m, 's', interface); | |
2592 | if (r < 0) | |
2593 | return r; | |
4be39163 | 2594 | |
718db961 LP |
2595 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2596 | if (r < 0) | |
2597 | return r; | |
4be39163 | 2598 | |
718db961 LP |
2599 | found_interface = true; |
2600 | } | |
4be39163 | 2601 | |
718db961 LP |
2602 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2603 | if (r < 0) | |
2604 | return r; | |
2605 | if (bus->nodes_modified) | |
2606 | return 0; | |
2607 | } | |
4be39163 | 2608 | |
718db961 LP |
2609 | if (found_interface) { |
2610 | r = sd_bus_message_close_container(m); | |
2611 | if (r < 0) | |
2612 | return r; | |
2613 | } | |
4be39163 | 2614 | |
718db961 | 2615 | return found_interface; |
4be39163 LP |
2616 | } |
2617 | ||
2618 | static int interfaces_added_append_one( | |
2619 | sd_bus *bus, | |
2620 | sd_bus_message *m, | |
2621 | const char *path, | |
2622 | const char *interface) { | |
2623 | ||
2624 | char *prefix; | |
2625 | int r; | |
2626 | ||
2627 | assert(bus); | |
2628 | assert(m); | |
2629 | assert(path); | |
2630 | assert(interface); | |
2631 | ||
2632 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2633 | if (r != 0) | |
2634 | return r; | |
68313d3d LP |
2635 | if (bus->nodes_modified) |
2636 | return 0; | |
4be39163 LP |
2637 | |
2638 | prefix = alloca(strlen(path) + 1); | |
2639 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2640 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2641 | if (r != 0) | |
2642 | return r; | |
68313d3d LP |
2643 | if (bus->nodes_modified) |
2644 | return 0; | |
4be39163 LP |
2645 | } |
2646 | ||
2647 | return -ENOENT; | |
992c052c LP |
2648 | } |
2649 | ||
d9f644e2 | 2650 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2651 | BUS_DONT_DESTROY(bus); |
2652 | ||
4afd3348 | 2653 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2654 | struct node *object_manager; |
4be39163 LP |
2655 | char **i; |
2656 | int r; | |
2657 | ||
2658 | assert_return(bus, -EINVAL); | |
45b1f410 | 2659 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2660 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2661 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2662 | ||
a3d59cd1 LP |
2663 | if (!BUS_IS_OPEN(bus->state)) |
2664 | return -ENOTCONN; | |
2665 | ||
4be39163 LP |
2666 | if (strv_isempty(interfaces)) |
2667 | return 0; | |
2668 | ||
2d5c8a27 DH |
2669 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2670 | if (r < 0) | |
2671 | return r; | |
2672 | if (r == 0) | |
2673 | return -ESRCH; | |
2674 | ||
68313d3d LP |
2675 | do { |
2676 | bus->nodes_modified = false; | |
1b02f301 | 2677 | m = sd_bus_message_unref(m); |
4be39163 | 2678 | |
2d5c8a27 | 2679 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2680 | if (r < 0) |
2681 | return r; | |
4be39163 | 2682 | |
68313d3d | 2683 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2684 | if (r < 0) |
2685 | return r; | |
2686 | ||
68313d3d | 2687 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2688 | if (r < 0) |
2689 | return r; | |
2690 | ||
68313d3d LP |
2691 | STRV_FOREACH(i, interfaces) { |
2692 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2693 | ||
2694 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2695 | if (r < 0) | |
2696 | return r; | |
2697 | ||
2698 | r = interfaces_added_append_one(bus, m, path, *i); | |
2699 | if (r < 0) | |
2700 | return r; | |
2701 | ||
2702 | if (bus->nodes_modified) | |
2703 | break; | |
2704 | ||
2705 | r = sd_bus_message_close_container(m); | |
2706 | if (r < 0) | |
2707 | return r; | |
2708 | } | |
2709 | ||
2710 | if (bus->nodes_modified) | |
2711 | continue; | |
2712 | ||
4be39163 LP |
2713 | r = sd_bus_message_close_container(m); |
2714 | if (r < 0) | |
2715 | return r; | |
4be39163 | 2716 | |
68313d3d | 2717 | } while (bus->nodes_modified); |
4be39163 LP |
2718 | |
2719 | return sd_bus_send(bus, m, NULL); | |
2720 | } | |
2721 | ||
d9f644e2 | 2722 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2723 | char **interfaces; |
4be39163 LP |
2724 | |
2725 | assert_return(bus, -EINVAL); | |
45b1f410 | 2726 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2727 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2728 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2729 | ||
a3d59cd1 LP |
2730 | if (!BUS_IS_OPEN(bus->state)) |
2731 | return -ENOTCONN; | |
2732 | ||
250a918d | 2733 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2734 | |
2735 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2736 | } | |
2737 | ||
d9f644e2 | 2738 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4afd3348 | 2739 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2740 | struct node *object_manager; |
4be39163 LP |
2741 | int r; |
2742 | ||
2743 | assert_return(bus, -EINVAL); | |
45b1f410 | 2744 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2745 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2746 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2747 | ||
a3d59cd1 LP |
2748 | if (!BUS_IS_OPEN(bus->state)) |
2749 | return -ENOTCONN; | |
2750 | ||
4be39163 LP |
2751 | if (strv_isempty(interfaces)) |
2752 | return 0; | |
2753 | ||
2d5c8a27 DH |
2754 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2755 | if (r < 0) | |
2756 | return r; | |
2757 | if (r == 0) | |
2758 | return -ESRCH; | |
2759 | ||
2760 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2761 | if (r < 0) |
2762 | return r; | |
2763 | ||
2764 | r = sd_bus_message_append_basic(m, 'o', path); | |
2765 | if (r < 0) | |
2766 | return r; | |
2767 | ||
2768 | r = sd_bus_message_append_strv(m, interfaces); | |
2769 | if (r < 0) | |
2770 | return r; | |
2771 | ||
2772 | return sd_bus_send(bus, m, NULL); | |
2773 | } | |
2774 | ||
d9f644e2 | 2775 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2776 | char **interfaces; |
4be39163 LP |
2777 | |
2778 | assert_return(bus, -EINVAL); | |
45b1f410 | 2779 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2780 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2781 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2782 | ||
a3d59cd1 LP |
2783 | if (!BUS_IS_OPEN(bus->state)) |
2784 | return -ENOTCONN; | |
2785 | ||
250a918d | 2786 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2787 | |
2788 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2789 | } |
2790 | ||
19befb2d LP |
2791 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2792 | sd_bus_slot *s; | |
992c052c | 2793 | struct node *n; |
19befb2d | 2794 | int r; |
992c052c | 2795 | |
dfa92725 | 2796 | assert_return(bus, -EINVAL); |
45b1f410 | 2797 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2798 | assert_return(object_path_is_valid(path), -EINVAL); |
2799 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2800 | |
2801 | n = bus_node_allocate(bus, path); | |
2802 | if (!n) | |
2803 | return -ENOMEM; | |
2804 | ||
19befb2d LP |
2805 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2806 | if (!s) { | |
2807 | r = -ENOMEM; | |
2808 | goto fail; | |
2809 | } | |
992c052c | 2810 | |
19befb2d LP |
2811 | s->node_object_manager.node = n; |
2812 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2813 | bus->nodes_modified = true; | |
992c052c | 2814 | |
19befb2d LP |
2815 | if (slot) |
2816 | *slot = s; | |
992c052c | 2817 | |
19befb2d | 2818 | return 0; |
992c052c | 2819 | |
19befb2d LP |
2820 | fail: |
2821 | sd_bus_slot_unref(s); | |
992c052c | 2822 | bus_node_gc(bus, n); |
dfa92725 | 2823 | |
19befb2d | 2824 | return r; |
992c052c | 2825 | } |