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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <endian.h> | |
23 | #include <assert.h> | |
24 | #include <stdlib.h> | |
25 | #include <unistd.h> | |
26 | #include <netdb.h> | |
27 | #include <sys/poll.h> | |
28 | #include <byteswap.h> | |
63edf05e | 29 | #include <sys/mman.h> |
45fbe937 | 30 | #include <pthread.h> |
de1c301e LP |
31 | |
32 | #include "util.h" | |
33 | #include "macro.h" | |
2fd9ae2e | 34 | #include "strv.h" |
0a72c2bd | 35 | #include "set.h" |
6c03089c | 36 | #include "missing.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
29ddb38f LP |
45 | #include "bus-introspect.h" |
46 | #include "bus-signature.h" | |
992c052c | 47 | #include "bus-objects.h" |
40ca29a1 | 48 | #include "bus-util.h" |
a7893c6b | 49 | #include "bus-container.h" |
de1c301e | 50 | |
e3017af9 LP |
51 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
52 | ||
f54514f3 LP |
53 | static void bus_close_fds(sd_bus *b) { |
54 | assert(b); | |
55 | ||
56 | if (b->input_fd >= 0) | |
57 | close_nointr_nofail(b->input_fd); | |
58 | ||
59 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
60 | close_nointr_nofail(b->output_fd); | |
61 | ||
62 | b->input_fd = b->output_fd = -1; | |
63 | } | |
64 | ||
29ddb38f LP |
65 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
66 | struct node_callback *c; | |
67 | struct node_vtable *v; | |
68 | struct node_enumerator *e; | |
69 | ||
70 | assert(b); | |
71 | ||
72 | if (!n) | |
73 | return; | |
74 | ||
75 | while (n->child) | |
76 | bus_node_destroy(b, n->child); | |
77 | ||
78 | while ((c = n->callbacks)) { | |
71fda00f | 79 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
80 | free(c); |
81 | } | |
82 | ||
83 | while ((v = n->vtables)) { | |
71fda00f | 84 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
85 | free(v->interface); |
86 | free(v); | |
87 | } | |
88 | ||
89 | while ((e = n->enumerators)) { | |
71fda00f | 90 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
91 | free(e); |
92 | } | |
93 | ||
94 | if (n->parent) | |
71fda00f | 95 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
96 | |
97 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
98 | free(n->path); | |
99 | free(n); | |
100 | } | |
101 | ||
0e586eae LP |
102 | static void bus_reset_queues(sd_bus *b) { |
103 | unsigned i; | |
104 | ||
105 | assert(b); | |
106 | ||
107 | for (i = 0; i < b->rqueue_size; i++) | |
108 | sd_bus_message_unref(b->rqueue[i]); | |
109 | free(b->rqueue); | |
110 | ||
111 | for (i = 0; i < b->wqueue_size; i++) | |
112 | sd_bus_message_unref(b->wqueue[i]); | |
113 | free(b->wqueue); | |
114 | ||
115 | b->rqueue = b->wqueue = NULL; | |
116 | b->rqueue_size = b->wqueue_size = 0; | |
117 | } | |
118 | ||
de1c301e LP |
119 | static void bus_free(sd_bus *b) { |
120 | struct filter_callback *f; | |
29ddb38f | 121 | struct node *n; |
de1c301e LP |
122 | |
123 | assert(b); | |
124 | ||
40ca29a1 LP |
125 | sd_bus_detach_event(b); |
126 | ||
f54514f3 | 127 | bus_close_fds(b); |
de1c301e | 128 | |
63edf05e LP |
129 | if (b->kdbus_buffer) |
130 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
131 | ||
de1c301e | 132 | free(b->rbuffer); |
89ffcd2a | 133 | free(b->unique_name); |
2181a7f5 | 134 | free(b->auth_buffer); |
89ffcd2a | 135 | free(b->address); |
e9a967f9 | 136 | free(b->kernel); |
a7893c6b | 137 | free(b->machine); |
89ffcd2a | 138 | |
2fd9ae2e LP |
139 | free(b->exec_path); |
140 | strv_free(b->exec_argv); | |
141 | ||
2c93b4ef LP |
142 | close_many(b->fds, b->n_fds); |
143 | free(b->fds); | |
144 | ||
0e586eae | 145 | bus_reset_queues(b); |
de1c301e LP |
146 | |
147 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 148 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
149 | |
150 | while ((f = b->filter_callbacks)) { | |
71fda00f | 151 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
152 | free(f); |
153 | } | |
154 | ||
392d5b37 LP |
155 | bus_match_free(&b->match_callbacks); |
156 | ||
29ddb38f LP |
157 | hashmap_free_free(b->vtable_methods); |
158 | hashmap_free_free(b->vtable_properties); | |
159 | ||
160 | while ((n = hashmap_first(b->nodes))) | |
161 | bus_node_destroy(b, n); | |
162 | ||
163 | hashmap_free(b->nodes); | |
164 | ||
bc7fd8cd LP |
165 | bus_kernel_flush_memfd(b); |
166 | ||
45fbe937 LP |
167 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
168 | ||
de1c301e LP |
169 | free(b); |
170 | } | |
171 | ||
d9f644e2 | 172 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
173 | sd_bus *r; |
174 | ||
d6888822 | 175 | assert_return(ret, -EINVAL); |
021a1e78 | 176 | |
de1c301e LP |
177 | r = new0(sd_bus, 1); |
178 | if (!r) | |
021a1e78 | 179 | return -ENOMEM; |
de1c301e | 180 | |
e4ee6e5c | 181 | r->n_ref = REFCNT_INIT; |
e82c9509 | 182 | r->input_fd = r->output_fd = -1; |
de1c301e | 183 | r->message_version = 1; |
d21a7bb1 DM |
184 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
185 | r->attach_flags |= KDBUS_ATTACH_NAMES; | |
d5a2b9a6 | 186 | r->original_pid = getpid(); |
de1c301e | 187 | |
45fbe937 LP |
188 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
189 | ||
de1c301e LP |
190 | /* We guarantee that wqueue always has space for at least one |
191 | * entry */ | |
192 | r->wqueue = new(sd_bus_message*, 1); | |
193 | if (!r->wqueue) { | |
194 | free(r); | |
021a1e78 | 195 | return -ENOMEM; |
de1c301e LP |
196 | } |
197 | ||
021a1e78 LP |
198 | *ret = r; |
199 | return 0; | |
200 | } | |
201 | ||
d9f644e2 | 202 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
203 | char *a; |
204 | ||
d6888822 LP |
205 | assert_return(bus, -EINVAL); |
206 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
207 | assert_return(address, -EINVAL); | |
208 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
209 | |
210 | a = strdup(address); | |
211 | if (!a) | |
212 | return -ENOMEM; | |
213 | ||
214 | free(bus->address); | |
215 | bus->address = a; | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
d9f644e2 | 220 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
221 | assert_return(bus, -EINVAL); |
222 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
223 | assert_return(input_fd >= 0, -EINVAL); | |
224 | assert_return(output_fd >= 0, -EINVAL); | |
225 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 226 | |
e82c9509 LP |
227 | bus->input_fd = input_fd; |
228 | bus->output_fd = output_fd; | |
021a1e78 LP |
229 | return 0; |
230 | } | |
231 | ||
d9f644e2 | 232 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
233 | char *p, **a; |
234 | ||
d6888822 LP |
235 | assert_return(bus, -EINVAL); |
236 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
237 | assert_return(path, -EINVAL); | |
238 | assert_return(!strv_isempty(argv), -EINVAL); | |
239 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
240 | |
241 | p = strdup(path); | |
242 | if (!p) | |
243 | return -ENOMEM; | |
244 | ||
245 | a = strv_copy(argv); | |
246 | if (!a) { | |
247 | free(p); | |
248 | return -ENOMEM; | |
249 | } | |
250 | ||
251 | free(bus->exec_path); | |
252 | strv_free(bus->exec_argv); | |
253 | ||
254 | bus->exec_path = p; | |
255 | bus->exec_argv = a; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
d9f644e2 | 260 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
261 | assert_return(bus, -EINVAL); |
262 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
263 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 264 | |
94bbf1ba | 265 | bus->bus_client = !!b; |
021a1e78 LP |
266 | return 0; |
267 | } | |
268 | ||
d9f644e2 | 269 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
270 | assert_return(bus, -EINVAL); |
271 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
272 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 273 | |
264ad849 LP |
274 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
275 | return 0; | |
276 | } | |
277 | ||
f21326e6 | 278 | _public_ int sd_bus_negotiate_attach_timestamp(sd_bus *bus, int b) { |
16be4368 KS |
279 | assert_return(bus, -EINVAL); |
280 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
281 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
282 | ||
d21a7bb1 | 283 | SET_FLAG(bus->attach_flags, KDBUS_ATTACH_TIMESTAMP, b); |
16be4368 KS |
284 | return 0; |
285 | } | |
286 | ||
5b12334d | 287 | _public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, uint64_t mask) { |
16be4368 | 288 | assert_return(bus, -EINVAL); |
5b12334d | 289 | assert_return(mask <= _SD_BUS_CREDS_MAX, -EINVAL); |
16be4368 KS |
290 | assert_return(bus->state == BUS_UNSET, -EPERM); |
291 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
292 | ||
49b832c5 LP |
293 | /* The well knowns we need unconditionally, so that matches can work */ |
294 | mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES; | |
295 | ||
87b522ae | 296 | return kdbus_translate_attach_flags(mask, &bus->creds_mask); |
021a1e78 | 297 | } |
de1c301e | 298 | |
d9f644e2 | 299 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
300 | assert_return(bus, -EINVAL); |
301 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
302 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
303 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
304 | |
305 | bus->is_server = !!b; | |
98178d39 | 306 | bus->server_id = server_id; |
2181a7f5 LP |
307 | return 0; |
308 | } | |
309 | ||
d9f644e2 | 310 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
311 | assert_return(bus, -EINVAL); |
312 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
313 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
314 | |
315 | bus->anonymous_auth = !!b; | |
316 | return 0; | |
317 | } | |
318 | ||
ebcf1f97 | 319 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e LP |
320 | const char *s; |
321 | int r; | |
322 | ||
323 | assert(bus); | |
c99c09a2 | 324 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e LP |
325 | assert(reply); |
326 | ||
40ca29a1 | 327 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
328 | if (r < 0) |
329 | return r; | |
40ca29a1 LP |
330 | if (r > 0) |
331 | return -r; | |
eb01ba5d | 332 | |
de1c301e LP |
333 | r = sd_bus_message_read(reply, "s", &s); |
334 | if (r < 0) | |
335 | return r; | |
336 | ||
dafb7591 LP |
337 | if (!service_name_is_valid(s) || s[0] != ':') |
338 | return -EBADMSG; | |
339 | ||
de1c301e LP |
340 | bus->unique_name = strdup(s); |
341 | if (!bus->unique_name) | |
342 | return -ENOMEM; | |
343 | ||
c99c09a2 LP |
344 | if (bus->state == BUS_HELLO) |
345 | bus->state = BUS_RUNNING; | |
dafb7591 | 346 | |
de1c301e LP |
347 | return 1; |
348 | } | |
349 | ||
350 | static int bus_send_hello(sd_bus *bus) { | |
351 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
352 | int r; | |
353 | ||
354 | assert(bus); | |
355 | ||
6629161f | 356 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
357 | return 0; |
358 | ||
de1c301e LP |
359 | r = sd_bus_message_new_method_call( |
360 | bus, | |
361 | "org.freedesktop.DBus", | |
362 | "/", | |
363 | "org.freedesktop.DBus", | |
364 | "Hello", | |
365 | &m); | |
366 | if (r < 0) | |
367 | return r; | |
368 | ||
c49b30a2 | 369 | return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
370 | } |
371 | ||
a7e3212d | 372 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
373 | assert(bus); |
374 | ||
f08838da | 375 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 376 | bus->state = BUS_HELLO; |
e3017af9 | 377 | return 1; |
de1c301e LP |
378 | } |
379 | ||
380 | bus->state = BUS_RUNNING; | |
e3017af9 | 381 | return 1; |
de1c301e LP |
382 | } |
383 | ||
384 | static int parse_address_key(const char **p, const char *key, char **value) { | |
385 | size_t l, n = 0; | |
386 | const char *a; | |
387 | char *r = NULL; | |
388 | ||
389 | assert(p); | |
390 | assert(*p); | |
de1c301e LP |
391 | assert(value); |
392 | ||
2fd9ae2e LP |
393 | if (key) { |
394 | l = strlen(key); | |
395 | if (strncmp(*p, key, l) != 0) | |
396 | return 0; | |
de1c301e | 397 | |
2fd9ae2e LP |
398 | if ((*p)[l] != '=') |
399 | return 0; | |
de1c301e | 400 | |
2fd9ae2e LP |
401 | if (*value) |
402 | return -EINVAL; | |
de1c301e | 403 | |
2fd9ae2e LP |
404 | a = *p + l + 1; |
405 | } else | |
406 | a = *p; | |
407 | ||
408 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
409 | char c, *t; |
410 | ||
411 | if (*a == '%') { | |
412 | int x, y; | |
413 | ||
414 | x = unhexchar(a[1]); | |
415 | if (x < 0) { | |
416 | free(r); | |
417 | return x; | |
418 | } | |
419 | ||
420 | y = unhexchar(a[2]); | |
421 | if (y < 0) { | |
422 | free(r); | |
423 | return y; | |
424 | } | |
425 | ||
de1c301e | 426 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
427 | a += 3; |
428 | } else { | |
de1c301e | 429 | c = *a; |
89ffcd2a LP |
430 | a++; |
431 | } | |
de1c301e | 432 | |
89ffcd2a | 433 | t = realloc(r, n + 2); |
de1c301e LP |
434 | if (!t) { |
435 | free(r); | |
436 | return -ENOMEM; | |
437 | } | |
438 | ||
439 | r = t; | |
440 | r[n++] = c; | |
441 | } | |
442 | ||
89ffcd2a LP |
443 | if (!r) { |
444 | r = strdup(""); | |
445 | if (!r) | |
446 | return -ENOMEM; | |
447 | } else | |
448 | r[n] = 0; | |
449 | ||
450 | if (*a == ',') | |
451 | a++; | |
452 | ||
de1c301e | 453 | *p = a; |
2fd9ae2e LP |
454 | |
455 | free(*value); | |
de1c301e | 456 | *value = r; |
2fd9ae2e | 457 | |
de1c301e LP |
458 | return 1; |
459 | } | |
460 | ||
461 | static void skip_address_key(const char **p) { | |
462 | assert(p); | |
463 | assert(*p); | |
464 | ||
89ffcd2a LP |
465 | *p += strcspn(*p, ","); |
466 | ||
467 | if (**p == ',') | |
468 | (*p) ++; | |
de1c301e LP |
469 | } |
470 | ||
2fd9ae2e LP |
471 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
472 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
473 | size_t l; | |
de1c301e LP |
474 | int r; |
475 | ||
476 | assert(b); | |
2fd9ae2e LP |
477 | assert(p); |
478 | assert(*p); | |
479 | assert(guid); | |
de1c301e | 480 | |
2fd9ae2e LP |
481 | while (**p != 0 && **p != ';') { |
482 | r = parse_address_key(p, "guid", guid); | |
483 | if (r < 0) | |
484 | return r; | |
485 | else if (r > 0) | |
486 | continue; | |
de1c301e | 487 | |
2fd9ae2e LP |
488 | r = parse_address_key(p, "path", &path); |
489 | if (r < 0) | |
490 | return r; | |
491 | else if (r > 0) | |
492 | continue; | |
de1c301e | 493 | |
2fd9ae2e LP |
494 | r = parse_address_key(p, "abstract", &abstract); |
495 | if (r < 0) | |
496 | return r; | |
497 | else if (r > 0) | |
498 | continue; | |
de1c301e | 499 | |
2fd9ae2e LP |
500 | skip_address_key(p); |
501 | } | |
de1c301e | 502 | |
2fd9ae2e LP |
503 | if (!path && !abstract) |
504 | return -EINVAL; | |
de1c301e | 505 | |
2fd9ae2e LP |
506 | if (path && abstract) |
507 | return -EINVAL; | |
508 | ||
509 | if (path) { | |
510 | l = strlen(path); | |
511 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
512 | return -E2BIG; | |
de1c301e | 513 | |
2fd9ae2e LP |
514 | b->sockaddr.un.sun_family = AF_UNIX; |
515 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
516 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
517 | } else if (abstract) { | |
518 | l = strlen(abstract); | |
519 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
520 | return -E2BIG; | |
521 | ||
522 | b->sockaddr.un.sun_family = AF_UNIX; | |
523 | b->sockaddr.un.sun_path[0] = 0; | |
524 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
525 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
526 | } | |
527 | ||
528 | return 0; | |
529 | } | |
530 | ||
531 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
532 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 533 | int r; |
b92bea5d ZJS |
534 | struct addrinfo *result, hints = { |
535 | .ai_socktype = SOCK_STREAM, | |
536 | .ai_flags = AI_ADDRCONFIG, | |
537 | }; | |
2fd9ae2e LP |
538 | |
539 | assert(b); | |
540 | assert(p); | |
541 | assert(*p); | |
542 | assert(guid); | |
543 | ||
544 | while (**p != 0 && **p != ';') { | |
545 | r = parse_address_key(p, "guid", guid); | |
546 | if (r < 0) | |
547 | return r; | |
548 | else if (r > 0) | |
549 | continue; | |
550 | ||
551 | r = parse_address_key(p, "host", &host); | |
552 | if (r < 0) | |
553 | return r; | |
554 | else if (r > 0) | |
555 | continue; | |
556 | ||
557 | r = parse_address_key(p, "port", &port); | |
558 | if (r < 0) | |
559 | return r; | |
560 | else if (r > 0) | |
561 | continue; | |
562 | ||
563 | r = parse_address_key(p, "family", &family); | |
564 | if (r < 0) | |
565 | return r; | |
566 | else if (r > 0) | |
567 | continue; | |
568 | ||
569 | skip_address_key(p); | |
570 | } | |
571 | ||
572 | if (!host || !port) | |
573 | return -EINVAL; | |
574 | ||
2fd9ae2e LP |
575 | if (family) { |
576 | if (streq(family, "ipv4")) | |
577 | hints.ai_family = AF_INET; | |
578 | else if (streq(family, "ipv6")) | |
579 | hints.ai_family = AF_INET6; | |
580 | else | |
581 | return -EINVAL; | |
582 | } | |
583 | ||
584 | r = getaddrinfo(host, port, &hints, &result); | |
585 | if (r == EAI_SYSTEM) | |
586 | return -errno; | |
587 | else if (r != 0) | |
588 | return -EADDRNOTAVAIL; | |
589 | ||
590 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
591 | b->sockaddr_size = result->ai_addrlen; | |
592 | ||
593 | freeaddrinfo(result); | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
599 | char *path = NULL; | |
600 | unsigned n_argv = 0, j; | |
601 | char **argv = NULL; | |
602 | int r; | |
603 | ||
604 | assert(b); | |
605 | assert(p); | |
606 | assert(*p); | |
607 | assert(guid); | |
608 | ||
609 | while (**p != 0 && **p != ';') { | |
610 | r = parse_address_key(p, "guid", guid); | |
611 | if (r < 0) | |
612 | goto fail; | |
613 | else if (r > 0) | |
614 | continue; | |
615 | ||
616 | r = parse_address_key(p, "path", &path); | |
617 | if (r < 0) | |
618 | goto fail; | |
619 | else if (r > 0) | |
620 | continue; | |
621 | ||
622 | if (startswith(*p, "argv")) { | |
623 | unsigned ul; | |
624 | ||
625 | errno = 0; | |
626 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 627 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
628 | r = -EINVAL; |
629 | goto fail; | |
630 | } | |
631 | ||
632 | (*p) ++; | |
633 | ||
634 | if (ul >= n_argv) { | |
635 | char **x; | |
636 | ||
637 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
638 | if (!x) { | |
639 | r = -ENOMEM; | |
640 | goto fail; | |
641 | } | |
642 | ||
643 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
644 | ||
645 | argv = x; | |
646 | n_argv = ul + 1; | |
647 | } | |
648 | ||
649 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 650 | if (r < 0) |
2fd9ae2e | 651 | goto fail; |
de1c301e | 652 | |
2fd9ae2e | 653 | continue; |
de1c301e LP |
654 | } |
655 | ||
2fd9ae2e LP |
656 | skip_address_key(p); |
657 | } | |
de1c301e | 658 | |
5a0f6033 LP |
659 | if (!path) { |
660 | r = -EINVAL; | |
2fd9ae2e | 661 | goto fail; |
5a0f6033 | 662 | } |
de1c301e | 663 | |
2fd9ae2e LP |
664 | /* Make sure there are no holes in the array, with the |
665 | * exception of argv[0] */ | |
666 | for (j = 1; j < n_argv; j++) | |
667 | if (!argv[j]) { | |
668 | r = -EINVAL; | |
669 | goto fail; | |
670 | } | |
671 | ||
672 | if (argv && argv[0] == NULL) { | |
673 | argv[0] = strdup(path); | |
674 | if (!argv[0]) { | |
675 | r = -ENOMEM; | |
676 | goto fail; | |
677 | } | |
678 | } | |
de1c301e | 679 | |
2fd9ae2e LP |
680 | b->exec_path = path; |
681 | b->exec_argv = argv; | |
682 | return 0; | |
de1c301e | 683 | |
2fd9ae2e LP |
684 | fail: |
685 | for (j = 0; j < n_argv; j++) | |
686 | free(argv[j]); | |
687 | ||
688 | free(argv); | |
689 | free(path); | |
690 | return r; | |
691 | } | |
692 | ||
6629161f LP |
693 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
694 | _cleanup_free_ char *path = NULL; | |
695 | int r; | |
696 | ||
697 | assert(b); | |
698 | assert(p); | |
699 | assert(*p); | |
700 | assert(guid); | |
701 | ||
702 | while (**p != 0 && **p != ';') { | |
703 | r = parse_address_key(p, "guid", guid); | |
704 | if (r < 0) | |
705 | return r; | |
706 | else if (r > 0) | |
707 | continue; | |
708 | ||
709 | r = parse_address_key(p, "path", &path); | |
710 | if (r < 0) | |
711 | return r; | |
712 | else if (r > 0) | |
713 | continue; | |
714 | ||
715 | skip_address_key(p); | |
716 | } | |
717 | ||
718 | if (!path) | |
719 | return -EINVAL; | |
720 | ||
721 | free(b->kernel); | |
722 | b->kernel = path; | |
723 | path = NULL; | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
a7893c6b LP |
728 | static int parse_container_address(sd_bus *b, const char **p, char **guid) { |
729 | _cleanup_free_ char *machine = NULL; | |
730 | int r; | |
731 | ||
732 | assert(b); | |
733 | assert(p); | |
734 | assert(*p); | |
735 | assert(guid); | |
736 | ||
737 | while (**p != 0 && **p != ';') { | |
738 | r = parse_address_key(p, "guid", guid); | |
739 | if (r < 0) | |
740 | return r; | |
741 | else if (r > 0) | |
742 | continue; | |
743 | ||
744 | r = parse_address_key(p, "machine", &machine); | |
745 | if (r < 0) | |
746 | return r; | |
747 | else if (r > 0) | |
748 | continue; | |
749 | ||
750 | skip_address_key(p); | |
751 | } | |
752 | ||
753 | if (!machine) | |
754 | return -EINVAL; | |
755 | ||
756 | free(b->machine); | |
757 | b->machine = machine; | |
758 | machine = NULL; | |
759 | ||
760 | b->sockaddr.un.sun_family = AF_UNIX; | |
761 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
762 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1; | |
763 | ||
764 | return 0; | |
765 | } | |
766 | ||
2fd9ae2e LP |
767 | static void bus_reset_parsed_address(sd_bus *b) { |
768 | assert(b); | |
769 | ||
770 | zero(b->sockaddr); | |
771 | b->sockaddr_size = 0; | |
772 | strv_free(b->exec_argv); | |
773 | free(b->exec_path); | |
774 | b->exec_path = NULL; | |
775 | b->exec_argv = NULL; | |
98178d39 | 776 | b->server_id = SD_ID128_NULL; |
6629161f LP |
777 | free(b->kernel); |
778 | b->kernel = NULL; | |
a7893c6b LP |
779 | free(b->machine); |
780 | b->machine = NULL; | |
2fd9ae2e LP |
781 | } |
782 | ||
783 | static int bus_parse_next_address(sd_bus *b) { | |
784 | _cleanup_free_ char *guid = NULL; | |
785 | const char *a; | |
786 | int r; | |
787 | ||
788 | assert(b); | |
789 | ||
790 | if (!b->address) | |
791 | return 0; | |
792 | if (b->address[b->address_index] == 0) | |
793 | return 0; | |
794 | ||
795 | bus_reset_parsed_address(b); | |
796 | ||
797 | a = b->address + b->address_index; | |
de1c301e | 798 | |
2fd9ae2e | 799 | while (*a != 0) { |
de1c301e | 800 | |
2fd9ae2e LP |
801 | if (*a == ';') { |
802 | a++; | |
803 | continue; | |
de1c301e LP |
804 | } |
805 | ||
2fd9ae2e LP |
806 | if (startswith(a, "unix:")) { |
807 | a += 5; | |
de1c301e | 808 | |
2fd9ae2e | 809 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
810 | if (r < 0) |
811 | return r; | |
2fd9ae2e | 812 | break; |
de1c301e | 813 | |
2fd9ae2e | 814 | } else if (startswith(a, "tcp:")) { |
de1c301e | 815 | |
2fd9ae2e LP |
816 | a += 4; |
817 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
818 | if (r < 0) |
819 | return r; | |
de1c301e | 820 | |
2fd9ae2e LP |
821 | break; |
822 | ||
823 | } else if (startswith(a, "unixexec:")) { | |
824 | ||
825 | a += 9; | |
826 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
827 | if (r < 0) |
828 | return r; | |
de1c301e | 829 | |
2fd9ae2e | 830 | break; |
de1c301e | 831 | |
6629161f LP |
832 | } else if (startswith(a, "kernel:")) { |
833 | ||
834 | a += 7; | |
835 | r = parse_kernel_address(b, &a, &guid); | |
836 | if (r < 0) | |
837 | return r; | |
838 | ||
a7893c6b LP |
839 | break; |
840 | } else if (startswith(a, "x-container:")) { | |
841 | ||
842 | a += 12; | |
843 | r = parse_container_address(b, &a, &guid); | |
844 | if (r < 0) | |
845 | return r; | |
846 | ||
6629161f | 847 | break; |
de1c301e LP |
848 | } |
849 | ||
2fd9ae2e LP |
850 | a = strchr(a, ';'); |
851 | if (!a) | |
852 | return 0; | |
de1c301e LP |
853 | } |
854 | ||
855 | if (guid) { | |
98178d39 | 856 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
857 | if (r < 0) |
858 | return r; | |
859 | } | |
860 | ||
2fd9ae2e | 861 | b->address_index = a - b->address; |
de1c301e LP |
862 | return 1; |
863 | } | |
864 | ||
a7e3212d | 865 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
866 | int r; |
867 | ||
868 | assert(b); | |
869 | ||
870 | for (;;) { | |
e82c9509 | 871 | sd_bus_close(b); |
2fd9ae2e | 872 | |
a7893c6b | 873 | if (b->exec_path) { |
a7e3212d | 874 | |
a7893c6b | 875 | r = bus_socket_exec(b); |
2fd9ae2e LP |
876 | if (r >= 0) |
877 | return r; | |
878 | ||
879 | b->last_connect_error = -r; | |
a7893c6b | 880 | } else if (b->kernel) { |
2fd9ae2e | 881 | |
a7893c6b LP |
882 | r = bus_kernel_connect(b); |
883 | if (r >= 0) | |
884 | return r; | |
2fd9ae2e | 885 | |
a7893c6b LP |
886 | b->last_connect_error = -r; |
887 | ||
888 | } else if (b->machine) { | |
889 | ||
890 | r = bus_container_connect(b); | |
2fd9ae2e LP |
891 | if (r >= 0) |
892 | return r; | |
893 | ||
6629161f | 894 | b->last_connect_error = -r; |
6629161f | 895 | |
a7893c6b LP |
896 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { |
897 | ||
898 | r = bus_socket_connect(b); | |
6629161f LP |
899 | if (r >= 0) |
900 | return r; | |
901 | ||
2fd9ae2e LP |
902 | b->last_connect_error = -r; |
903 | } | |
904 | ||
905 | r = bus_parse_next_address(b); | |
906 | if (r < 0) | |
907 | return r; | |
908 | if (r == 0) | |
909 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
910 | } |
911 | } | |
912 | ||
a7e3212d LP |
913 | int bus_next_address(sd_bus *b) { |
914 | assert(b); | |
915 | ||
916 | bus_reset_parsed_address(b); | |
917 | return bus_start_address(b); | |
918 | } | |
919 | ||
021a1e78 | 920 | static int bus_start_fd(sd_bus *b) { |
6629161f | 921 | struct stat st; |
021a1e78 LP |
922 | int r; |
923 | ||
924 | assert(b); | |
e82c9509 LP |
925 | assert(b->input_fd >= 0); |
926 | assert(b->output_fd >= 0); | |
021a1e78 | 927 | |
e82c9509 | 928 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
929 | if (r < 0) |
930 | return r; | |
931 | ||
e82c9509 | 932 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
933 | if (r < 0) |
934 | return r; | |
935 | ||
e82c9509 LP |
936 | if (b->input_fd != b->output_fd) { |
937 | r = fd_nonblock(b->output_fd, true); | |
938 | if (r < 0) | |
939 | return r; | |
940 | ||
941 | r = fd_cloexec(b->output_fd, true); | |
942 | if (r < 0) | |
943 | return r; | |
944 | } | |
945 | ||
6629161f LP |
946 | if (fstat(b->input_fd, &st) < 0) |
947 | return -errno; | |
948 | ||
949 | if (S_ISCHR(b->input_fd)) | |
950 | return bus_kernel_take_fd(b); | |
951 | else | |
952 | return bus_socket_take_fd(b); | |
021a1e78 LP |
953 | } |
954 | ||
d9f644e2 | 955 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
956 | int r; |
957 | ||
d6888822 LP |
958 | assert_return(bus, -EINVAL); |
959 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
960 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
961 | |
962 | bus->state = BUS_OPENING; | |
963 | ||
2181a7f5 LP |
964 | if (bus->is_server && bus->bus_client) |
965 | return -EINVAL; | |
966 | ||
e82c9509 | 967 | if (bus->input_fd >= 0) |
021a1e78 | 968 | r = bus_start_fd(bus); |
a7893c6b | 969 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 970 | r = bus_start_address(bus); |
021a1e78 LP |
971 | else |
972 | return -EINVAL; | |
973 | ||
974 | if (r < 0) | |
975 | return r; | |
976 | ||
977 | return bus_send_hello(bus); | |
978 | } | |
979 | ||
d9f644e2 | 980 | _public_ int sd_bus_open_system(sd_bus **ret) { |
de1c301e LP |
981 | const char *e; |
982 | sd_bus *b; | |
983 | int r; | |
984 | ||
d6888822 | 985 | assert_return(ret, -EINVAL); |
de1c301e | 986 | |
021a1e78 LP |
987 | r = sd_bus_new(&b); |
988 | if (r < 0) | |
989 | return r; | |
990 | ||
6c03089c | 991 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
e3dd987c | 992 | if (e) |
021a1e78 | 993 | r = sd_bus_set_address(b, e); |
e3dd987c LP |
994 | else |
995 | r = sd_bus_set_address(b, "kernel:path=/dev/kdbus/0-system/bus;unix:path=/run/dbus/system_bus_socket"); | |
996 | ||
997 | if (r < 0) | |
998 | goto fail; | |
de1c301e | 999 | |
94bbf1ba | 1000 | b->bus_client = true; |
021a1e78 LP |
1001 | |
1002 | r = sd_bus_start(b); | |
1003 | if (r < 0) | |
1004 | goto fail; | |
de1c301e LP |
1005 | |
1006 | *ret = b; | |
1007 | return 0; | |
021a1e78 LP |
1008 | |
1009 | fail: | |
1010 | bus_free(b); | |
1011 | return r; | |
de1c301e LP |
1012 | } |
1013 | ||
d9f644e2 | 1014 | _public_ int sd_bus_open_user(sd_bus **ret) { |
de1c301e LP |
1015 | const char *e; |
1016 | sd_bus *b; | |
de1c301e LP |
1017 | int r; |
1018 | ||
d6888822 | 1019 | assert_return(ret, -EINVAL); |
de1c301e | 1020 | |
021a1e78 LP |
1021 | r = sd_bus_new(&b); |
1022 | if (r < 0) | |
1023 | return r; | |
1024 | ||
6c03089c | 1025 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1026 | if (e) { |
021a1e78 | 1027 | r = sd_bus_set_address(b, e); |
de1c301e | 1028 | if (r < 0) |
021a1e78 | 1029 | goto fail; |
89ffcd2a | 1030 | } else { |
6c03089c | 1031 | e = secure_getenv("XDG_RUNTIME_DIR"); |
e3dd987c LP |
1032 | if (e) { |
1033 | _cleanup_free_ char *ee = NULL; | |
1034 | ||
1035 | ee = bus_address_escape(e); | |
1036 | if (!ee) { | |
1037 | r = -ENOENT; | |
1038 | goto fail; | |
1039 | } | |
1040 | ||
1041 | asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus;unix:path=%s/bus", (unsigned long) getuid(), ee); | |
1042 | } else | |
1043 | asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus", (unsigned long) getuid()); | |
de1c301e | 1044 | |
e3dd987c LP |
1045 | if (!b->address) { |
1046 | r = -ENOMEM; | |
021a1e78 LP |
1047 | goto fail; |
1048 | } | |
de1c301e LP |
1049 | } |
1050 | ||
94bbf1ba | 1051 | b->bus_client = true; |
de1c301e | 1052 | |
021a1e78 | 1053 | r = sd_bus_start(b); |
2571ead1 LP |
1054 | if (r < 0) |
1055 | goto fail; | |
de1c301e LP |
1056 | |
1057 | *ret = b; | |
1058 | return 0; | |
2571ead1 LP |
1059 | |
1060 | fail: | |
021a1e78 | 1061 | bus_free(b); |
2571ead1 | 1062 | return r; |
de1c301e LP |
1063 | } |
1064 | ||
d9f644e2 | 1065 | _public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
0f8bd8de LP |
1066 | _cleanup_free_ char *e = NULL; |
1067 | char *p = NULL; | |
1068 | sd_bus *bus; | |
1069 | int r; | |
1070 | ||
1071 | assert_return(host, -EINVAL); | |
1072 | assert_return(ret, -EINVAL); | |
1073 | ||
1074 | e = bus_address_escape(host); | |
1075 | if (!e) | |
1076 | return -ENOMEM; | |
1077 | ||
1078 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1079 | if (!p) | |
1080 | return -ENOMEM; | |
a7893c6b LP |
1081 | |
1082 | r = sd_bus_new(&bus); | |
1083 | if (r < 0) { | |
1084 | free(p); | |
1085 | return r; | |
1086 | } | |
1087 | ||
1088 | bus->address = p; | |
1089 | bus->bus_client = true; | |
1090 | ||
1091 | r = sd_bus_start(bus); | |
1092 | if (r < 0) { | |
1093 | bus_free(bus); | |
1094 | return r; | |
1095 | } | |
1096 | ||
1097 | *ret = bus; | |
1098 | return 0; | |
1099 | } | |
1100 | ||
d9f644e2 | 1101 | _public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) { |
a7893c6b LP |
1102 | _cleanup_free_ char *e = NULL; |
1103 | sd_bus *bus; | |
1104 | char *p; | |
1105 | int r; | |
1106 | ||
1107 | assert_return(machine, -EINVAL); | |
1108 | assert_return(ret, -EINVAL); | |
1109 | ||
1110 | e = bus_address_escape(machine); | |
1111 | if (!e) | |
1112 | return -ENOMEM; | |
1113 | ||
1114 | p = strjoin("x-container:machine=", e, NULL); | |
1115 | if (!p) | |
1116 | return -ENOMEM; | |
0f8bd8de LP |
1117 | |
1118 | r = sd_bus_new(&bus); | |
1119 | if (r < 0) { | |
1120 | free(p); | |
1121 | return r; | |
1122 | } | |
1123 | ||
1124 | bus->address = p; | |
1125 | bus->bus_client = true; | |
1126 | ||
1127 | r = sd_bus_start(bus); | |
1128 | if (r < 0) { | |
1129 | bus_free(bus); | |
1130 | return r; | |
1131 | } | |
1132 | ||
1133 | *ret = bus; | |
1134 | return 0; | |
1135 | } | |
1136 | ||
d9f644e2 | 1137 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1138 | |
de1c301e LP |
1139 | if (!bus) |
1140 | return; | |
d5a2b9a6 LP |
1141 | if (bus->state == BUS_CLOSED) |
1142 | return; | |
1143 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1144 | return; |
1145 | ||
1146 | bus->state = BUS_CLOSED; | |
e82c9509 | 1147 | |
40ca29a1 LP |
1148 | sd_bus_detach_event(bus); |
1149 | ||
0e586eae LP |
1150 | /* Drop all queued messages so that they drop references to |
1151 | * the bus object and the bus may be freed */ | |
1152 | bus_reset_queues(bus); | |
1153 | ||
f54514f3 LP |
1154 | if (!bus->is_kernel) |
1155 | bus_close_fds(bus); | |
1156 | ||
1157 | /* We'll leave the fd open in case this is a kernel bus, since | |
1158 | * there might still be memblocks around that reference this | |
1d0e3c98 DM |
1159 | * bus, and they might need to invoke the * KDBUS_CMD_FREE |
1160 | * ioctl on the fd when they are freed. */ | |
de1c301e LP |
1161 | } |
1162 | ||
718db961 LP |
1163 | static void bus_enter_closing(sd_bus *bus) { |
1164 | assert(bus); | |
1165 | ||
1166 | if (bus->state != BUS_OPENING && | |
1167 | bus->state != BUS_AUTHENTICATING && | |
1168 | bus->state != BUS_HELLO && | |
1169 | bus->state != BUS_RUNNING) | |
1170 | return; | |
1171 | ||
1172 | bus->state = BUS_CLOSING; | |
1173 | } | |
1174 | ||
d9f644e2 | 1175 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1176 | assert_return(bus, NULL); |
de1c301e | 1177 | |
e4ee6e5c | 1178 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1179 | |
de1c301e LP |
1180 | return bus; |
1181 | } | |
1182 | ||
d9f644e2 | 1183 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
9d6c7c82 | 1184 | assert_return(bus, NULL); |
de1c301e | 1185 | |
e4ee6e5c | 1186 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1187 | bus_free(bus); |
1188 | ||
1189 | return NULL; | |
1190 | } | |
1191 | ||
d9f644e2 | 1192 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1193 | |
1194 | assert_return(bus, -EINVAL); | |
1195 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1196 | |
f54514f3 | 1197 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1198 | } |
1199 | ||
d9f644e2 | 1200 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1201 | int r; |
1202 | ||
d6888822 LP |
1203 | assert_return(bus, -EINVAL); |
1204 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1205 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1206 | |
d728d708 | 1207 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1208 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1209 | return 0; |
1210 | ||
20902f3e | 1211 | r = bus_ensure_running(bus); |
d728d708 LP |
1212 | if (r < 0) |
1213 | return r; | |
de1c301e | 1214 | |
d728d708 LP |
1215 | return bus->can_fds; |
1216 | } | |
1217 | ||
1218 | return bus_type_is_valid(type); | |
de1c301e LP |
1219 | } |
1220 | ||
d9f644e2 | 1221 | _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1222 | int r; |
de1c301e | 1223 | |
d6888822 LP |
1224 | assert_return(bus, -EINVAL); |
1225 | assert_return(server_id, -EINVAL); | |
1226 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1227 | |
20902f3e | 1228 | r = bus_ensure_running(bus); |
d728d708 LP |
1229 | if (r < 0) |
1230 | return r; | |
de1c301e | 1231 | |
98178d39 | 1232 | *server_id = bus->server_id; |
d728d708 | 1233 | return 0; |
de1c301e LP |
1234 | } |
1235 | ||
7adc46fc LP |
1236 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { |
1237 | assert(b); | |
de1c301e LP |
1238 | assert(m); |
1239 | ||
89ffcd2a LP |
1240 | if (m->header->version > b->message_version) |
1241 | return -EPERM; | |
1242 | ||
aea93deb LP |
1243 | if (m->sealed) { |
1244 | /* If we copy the same message to multiple | |
1245 | * destinations, avoid using the same serial | |
1246 | * numbers. */ | |
1247 | b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m)); | |
de1c301e | 1248 | return 0; |
aea93deb | 1249 | } |
de1c301e | 1250 | |
9a17484d | 1251 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1252 | } |
1253 | ||
7adc46fc LP |
1254 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1255 | assert(b); | |
1256 | assert(m); | |
1257 | ||
1258 | if (m->header->version > b->message_version) | |
1259 | return -EPERM; | |
1260 | ||
1261 | /* The bus specification says the serial number cannot be 0, | |
1262 | * hence let's fill something in for synthetic messages. Since | |
1263 | * synthetic messages might have a fake sender and we don't | |
1264 | * want to interfere with the real sender's serial numbers we | |
1265 | * pick a fixed, artifical one. We use (uint32_t) -1 rather | |
1266 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, | |
1267 | * even though kdbus can do 64bit. */ | |
1268 | ||
1269 | return bus_message_seal(m, 0xFFFFFFFFULL); | |
1270 | } | |
1271 | ||
718db961 LP |
1272 | static int bus_write_message(sd_bus *bus, sd_bus_message *message, size_t *idx) { |
1273 | int r; | |
1274 | ||
1275 | assert(bus); | |
1276 | assert(message); | |
1277 | ||
1278 | if (bus->is_kernel) | |
a43b9ca3 | 1279 | return bus_kernel_write_message(bus, message); |
718db961 | 1280 | else |
a43b9ca3 | 1281 | return bus_socket_write_message(bus, message, idx); |
718db961 LP |
1282 | |
1283 | return r; | |
1284 | } | |
1285 | ||
de1c301e | 1286 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1287 | int r, ret = 0; |
de1c301e LP |
1288 | |
1289 | assert(bus); | |
89ffcd2a | 1290 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1291 | |
de1c301e LP |
1292 | while (bus->wqueue_size > 0) { |
1293 | ||
718db961 LP |
1294 | r = bus_write_message(bus, bus->wqueue[0], &bus->windex); |
1295 | if (r < 0) | |
de1c301e | 1296 | return r; |
718db961 | 1297 | else if (r == 0) |
e3017af9 LP |
1298 | /* Didn't do anything this time */ |
1299 | return ret; | |
6629161f | 1300 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1301 | /* Fully written. Let's drop the entry from |
1302 | * the queue. | |
1303 | * | |
1304 | * This isn't particularly optimized, but | |
1305 | * well, this is supposed to be our worst-case | |
1306 | * buffer only, and the socket buffer is | |
1307 | * supposed to be our primary buffer, and if | |
1308 | * it got full, then all bets are off | |
1309 | * anyway. */ | |
1310 | ||
1311 | sd_bus_message_unref(bus->wqueue[0]); | |
1312 | bus->wqueue_size --; | |
1313 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1314 | bus->windex = 0; | |
1315 | ||
e3017af9 | 1316 | ret = 1; |
de1c301e LP |
1317 | } |
1318 | } | |
1319 | ||
e3017af9 | 1320 | return ret; |
de1c301e LP |
1321 | } |
1322 | ||
7d22c717 LP |
1323 | static int bus_read_message(sd_bus *bus) { |
1324 | assert(bus); | |
1325 | ||
1326 | if (bus->is_kernel) | |
1327 | return bus_kernel_read_message(bus); | |
1328 | else | |
1329 | return bus_socket_read_message(bus); | |
1330 | } | |
1331 | ||
7adc46fc | 1332 | int bus_rqueue_make_room(sd_bus *bus) { |
7d22c717 LP |
1333 | sd_bus_message **q; |
1334 | unsigned x; | |
1335 | ||
7adc46fc | 1336 | x = bus->rqueue_size + 1; |
7d22c717 LP |
1337 | |
1338 | if (bus->rqueue_allocated >= x) | |
1339 | return 0; | |
1340 | ||
1341 | if (x > BUS_RQUEUE_MAX) | |
1342 | return -ENOBUFS; | |
1343 | ||
1344 | q = realloc(bus->rqueue, x * sizeof(sd_bus_message*)); | |
1345 | if (!q) | |
1346 | return -ENOMEM; | |
1347 | ||
1348 | bus->rqueue = q; | |
1349 | bus->rqueue_allocated = x; | |
1350 | ||
1351 | return 0; | |
1352 | } | |
1353 | ||
de1c301e | 1354 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { |
e3017af9 | 1355 | int r, ret = 0; |
de1c301e LP |
1356 | |
1357 | assert(bus); | |
1358 | assert(m); | |
89ffcd2a | 1359 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1360 | |
7d22c717 LP |
1361 | for (;;) { |
1362 | if (bus->rqueue_size > 0) { | |
1363 | /* Dispatch a queued message */ | |
de1c301e | 1364 | |
7d22c717 LP |
1365 | *m = bus->rqueue[0]; |
1366 | bus->rqueue_size --; | |
1367 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1368 | return 1; | |
1369 | } | |
de1c301e | 1370 | |
7d22c717 LP |
1371 | /* Try to read a new message */ |
1372 | r = bus_read_message(bus); | |
718db961 | 1373 | if (r < 0) |
e3017af9 | 1374 | return r; |
e3017af9 LP |
1375 | if (r == 0) |
1376 | return ret; | |
de1c301e | 1377 | |
2e8d788c | 1378 | ret = 1; |
7d22c717 | 1379 | } |
de1c301e LP |
1380 | } |
1381 | ||
d9f644e2 | 1382 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { |
de1c301e LP |
1383 | int r; |
1384 | ||
d6888822 LP |
1385 | assert_return(bus, -EINVAL); |
1386 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1387 | assert_return(m, -EINVAL); | |
1388 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1389 | |
1390 | if (m->n_fds > 0) { | |
1391 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1392 | if (r < 0) | |
1393 | return r; | |
1394 | if (r == 0) | |
1395 | return -ENOTSUP; | |
1396 | } | |
de1c301e | 1397 | |
29f6aadd LP |
1398 | /* If the serial number isn't kept, then we know that no reply |
1399 | * is expected */ | |
1400 | if (!serial && !m->sealed) | |
1401 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1402 | ||
de1c301e LP |
1403 | r = bus_seal_message(bus, m); |
1404 | if (r < 0) | |
1405 | return r; | |
1406 | ||
5407f2de LP |
1407 | /* If this is a reply and no reply was requested, then let's |
1408 | * suppress this, if we can */ | |
1409 | if (m->dont_send && !serial) | |
7a37d625 | 1410 | return 1; |
5407f2de | 1411 | |
89ffcd2a | 1412 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1413 | size_t idx = 0; |
1414 | ||
718db961 | 1415 | r = bus_write_message(bus, m, &idx); |
32f46480 LP |
1416 | if (r < 0) { |
1417 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1418 | bus_enter_closing(bus); | |
1419 | ||
de1c301e | 1420 | return r; |
32f46480 | 1421 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1422 | /* Wasn't fully written. So let's remember how |
1423 | * much was written. Note that the first entry | |
1424 | * of the wqueue array is always allocated so | |
1425 | * that we always can remember how much was | |
1426 | * written. */ | |
1427 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1428 | bus->wqueue_size = 1; | |
1429 | bus->windex = idx; | |
1430 | } | |
1431 | } else { | |
1432 | sd_bus_message **q; | |
1433 | ||
1434 | /* Just append it to the queue. */ | |
1435 | ||
25220239 | 1436 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1437 | return -ENOBUFS; |
1438 | ||
1439 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1440 | if (!q) | |
1441 | return -ENOMEM; | |
1442 | ||
1443 | bus->wqueue = q; | |
1444 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1445 | } | |
1446 | ||
1447 | if (serial) | |
1448 | *serial = BUS_MESSAGE_SERIAL(m); | |
1449 | ||
7a37d625 | 1450 | return 1; |
de1c301e LP |
1451 | } |
1452 | ||
911121a7 LP |
1453 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *serial) { |
1454 | int r; | |
1455 | ||
1456 | assert_return(bus, -EINVAL); | |
1457 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1458 | assert_return(m, -EINVAL); | |
1459 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1460 | ||
1461 | if (!streq_ptr(m->destination, destination)) { | |
1462 | ||
1463 | if (!destination) | |
1464 | return -EEXIST; | |
1465 | ||
1466 | r = sd_bus_message_set_destination(m, destination); | |
1467 | if (r < 0) | |
1468 | return r; | |
1469 | } | |
1470 | ||
1471 | return sd_bus_send(bus, m, serial); | |
1472 | } | |
1473 | ||
de1c301e LP |
1474 | static usec_t calc_elapse(uint64_t usec) { |
1475 | if (usec == (uint64_t) -1) | |
1476 | return 0; | |
1477 | ||
1478 | if (usec == 0) | |
e3017af9 | 1479 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1480 | |
1481 | return now(CLOCK_MONOTONIC) + usec; | |
1482 | } | |
1483 | ||
e3017af9 LP |
1484 | static int timeout_compare(const void *a, const void *b) { |
1485 | const struct reply_callback *x = a, *y = b; | |
1486 | ||
1487 | if (x->timeout != 0 && y->timeout == 0) | |
1488 | return -1; | |
1489 | ||
1490 | if (x->timeout == 0 && y->timeout != 0) | |
1491 | return 1; | |
1492 | ||
1493 | if (x->timeout < y->timeout) | |
1494 | return -1; | |
1495 | ||
1496 | if (x->timeout > y->timeout) | |
1497 | return 1; | |
1498 | ||
1499 | return 0; | |
1500 | } | |
1501 | ||
c49b30a2 | 1502 | _public_ int sd_bus_call_async( |
de1c301e LP |
1503 | sd_bus *bus, |
1504 | sd_bus_message *m, | |
52f3ba91 | 1505 | sd_bus_message_handler_t callback, |
de1c301e LP |
1506 | void *userdata, |
1507 | uint64_t usec, | |
1508 | uint64_t *serial) { | |
1509 | ||
1510 | struct reply_callback *c; | |
1511 | int r; | |
1512 | ||
d6888822 LP |
1513 | assert_return(bus, -EINVAL); |
1514 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1515 | assert_return(m, -EINVAL); | |
40ca29a1 | 1516 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1517 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1518 | assert_return(callback, -EINVAL); | |
1519 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1520 | |
1521 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1522 | if (r < 0) | |
1523 | return r; | |
de1c301e | 1524 | |
e3017af9 LP |
1525 | if (usec != (uint64_t) -1) { |
1526 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1527 | if (r < 0) | |
1528 | return r; | |
1529 | } | |
1530 | ||
de1c301e LP |
1531 | r = bus_seal_message(bus, m); |
1532 | if (r < 0) | |
1533 | return r; | |
1534 | ||
eba8617e | 1535 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1536 | if (!c) |
1537 | return -ENOMEM; | |
1538 | ||
1539 | c->callback = callback; | |
1540 | c->userdata = userdata; | |
1541 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1542 | c->timeout = calc_elapse(usec); | |
1543 | ||
1544 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1545 | if (r < 0) { | |
1546 | free(c); | |
1547 | return r; | |
1548 | } | |
1549 | ||
e3017af9 LP |
1550 | if (c->timeout != 0) { |
1551 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1552 | if (r < 0) { | |
1553 | c->timeout = 0; | |
c49b30a2 | 1554 | sd_bus_call_async_cancel(bus, c->serial); |
e3017af9 LP |
1555 | return r; |
1556 | } | |
1557 | } | |
1558 | ||
de1c301e LP |
1559 | r = sd_bus_send(bus, m, serial); |
1560 | if (r < 0) { | |
c49b30a2 | 1561 | sd_bus_call_async_cancel(bus, c->serial); |
de1c301e LP |
1562 | return r; |
1563 | } | |
1564 | ||
1565 | return r; | |
1566 | } | |
1567 | ||
c49b30a2 | 1568 | _public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t serial) { |
e3017af9 | 1569 | struct reply_callback *c; |
de1c301e | 1570 | |
d6888822 LP |
1571 | assert_return(bus, -EINVAL); |
1572 | assert_return(serial != 0, -EINVAL); | |
1573 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1574 | |
1575 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1576 | if (!c) | |
1577 | return 0; | |
1578 | ||
e3017af9 LP |
1579 | if (c->timeout != 0) |
1580 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1581 | ||
de1c301e LP |
1582 | free(c); |
1583 | return 1; | |
1584 | } | |
1585 | ||
20902f3e | 1586 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1587 | int r; |
1588 | ||
1589 | assert(bus); | |
1590 | ||
718db961 | 1591 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1592 | return -ENOTCONN; |
d728d708 LP |
1593 | if (bus->state == BUS_RUNNING) |
1594 | return 1; | |
89ffcd2a LP |
1595 | |
1596 | for (;;) { | |
1597 | r = sd_bus_process(bus, NULL); | |
1598 | if (r < 0) | |
1599 | return r; | |
d728d708 LP |
1600 | if (bus->state == BUS_RUNNING) |
1601 | return 1; | |
e3017af9 LP |
1602 | if (r > 0) |
1603 | continue; | |
89ffcd2a LP |
1604 | |
1605 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1606 | if (r < 0) | |
1607 | return r; | |
1608 | } | |
1609 | } | |
1610 | ||
c49b30a2 | 1611 | _public_ int sd_bus_call( |
de1c301e LP |
1612 | sd_bus *bus, |
1613 | sd_bus_message *m, | |
1614 | uint64_t usec, | |
1615 | sd_bus_error *error, | |
1616 | sd_bus_message **reply) { | |
1617 | ||
de1c301e LP |
1618 | usec_t timeout; |
1619 | uint64_t serial; | |
7d22c717 LP |
1620 | unsigned i; |
1621 | int r; | |
de1c301e | 1622 | |
d6888822 LP |
1623 | assert_return(bus, -EINVAL); |
1624 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1625 | assert_return(m, -EINVAL); | |
40ca29a1 | 1626 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1627 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1628 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1629 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1630 | |
20902f3e | 1631 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1632 | if (r < 0) |
1633 | return r; | |
de1c301e | 1634 | |
a43b9ca3 LP |
1635 | i = bus->rqueue_size; |
1636 | ||
de1c301e LP |
1637 | r = sd_bus_send(bus, m, &serial); |
1638 | if (r < 0) | |
1639 | return r; | |
1640 | ||
1641 | timeout = calc_elapse(usec); | |
1642 | ||
1643 | for (;;) { | |
1644 | usec_t left; | |
de1c301e | 1645 | |
7d22c717 LP |
1646 | while (i < bus->rqueue_size) { |
1647 | sd_bus_message *incoming = NULL; | |
1648 | ||
1649 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1650 | |
de1c301e LP |
1651 | if (incoming->reply_serial == serial) { |
1652 | /* Found a match! */ | |
1653 | ||
7d22c717 LP |
1654 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1655 | bus->rqueue_size--; | |
1656 | ||
40ca29a1 | 1657 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1658 | |
1659 | if (reply) | |
1660 | *reply = incoming; | |
1661 | else | |
1662 | sd_bus_message_unref(incoming); | |
1663 | ||
7a37d625 | 1664 | return 1; |
a43b9ca3 | 1665 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1666 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1667 | else |
1668 | r = -EIO; | |
de1c301e LP |
1669 | |
1670 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 1671 | return r; |
a8a07f89 LP |
1672 | |
1673 | } else if (incoming->header->serial == serial && | |
1674 | bus->unique_name && | |
1675 | incoming->sender && | |
1676 | streq(bus->unique_name, incoming->sender)) { | |
1677 | ||
7d22c717 LP |
1678 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1679 | bus->rqueue_size--; | |
1680 | ||
a8a07f89 LP |
1681 | /* Our own message? Somebody is trying |
1682 | * to send its own client a message, | |
1683 | * let's not dead-lock, let's fail | |
1684 | * immediately. */ | |
1685 | ||
1686 | sd_bus_message_unref(incoming); | |
1687 | return -ELOOP; | |
de1c301e LP |
1688 | } |
1689 | ||
de1c301e | 1690 | /* Try to read more, right-away */ |
7d22c717 | 1691 | i++; |
de1c301e | 1692 | } |
7d22c717 | 1693 | |
a43b9ca3 | 1694 | r = bus_read_message(bus); |
32f46480 LP |
1695 | if (r < 0) { |
1696 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1697 | bus_enter_closing(bus); | |
1698 | ||
a43b9ca3 | 1699 | return r; |
32f46480 | 1700 | } |
7d22c717 | 1701 | if (r > 0) |
e3017af9 | 1702 | continue; |
de1c301e LP |
1703 | |
1704 | if (timeout > 0) { | |
1705 | usec_t n; | |
1706 | ||
1707 | n = now(CLOCK_MONOTONIC); | |
1708 | if (n >= timeout) | |
1709 | return -ETIMEDOUT; | |
1710 | ||
1711 | left = timeout - n; | |
1712 | } else | |
1713 | left = (uint64_t) -1; | |
1714 | ||
e3017af9 | 1715 | r = bus_poll(bus, true, left); |
de1c301e LP |
1716 | if (r < 0) |
1717 | return r; | |
1718 | ||
1719 | r = dispatch_wqueue(bus); | |
32f46480 LP |
1720 | if (r < 0) { |
1721 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1722 | bus_enter_closing(bus); | |
1723 | ||
de1c301e | 1724 | return r; |
32f46480 | 1725 | } |
de1c301e LP |
1726 | } |
1727 | } | |
1728 | ||
d9f644e2 | 1729 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1730 | |
1731 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1732 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1733 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1734 | |
e82c9509 | 1735 | return bus->input_fd; |
de1c301e LP |
1736 | } |
1737 | ||
d9f644e2 | 1738 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1739 | int flags = 0; |
1740 | ||
d6888822 | 1741 | assert_return(bus, -EINVAL); |
718db961 | 1742 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1743 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e LP |
1744 | |
1745 | if (bus->state == BUS_OPENING) | |
1746 | flags |= POLLOUT; | |
89ffcd2a LP |
1747 | else if (bus->state == BUS_AUTHENTICATING) { |
1748 | ||
2181a7f5 | 1749 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1750 | flags |= POLLOUT; |
1751 | ||
1752 | flags |= POLLIN; | |
1753 | ||
1754 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1755 | if (bus->rqueue_size <= 0) |
1756 | flags |= POLLIN; | |
1757 | if (bus->wqueue_size > 0) | |
1758 | flags |= POLLOUT; | |
1759 | } | |
1760 | ||
1761 | return flags; | |
1762 | } | |
1763 | ||
d9f644e2 | 1764 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
1765 | struct reply_callback *c; |
1766 | ||
d6888822 LP |
1767 | assert_return(bus, -EINVAL); |
1768 | assert_return(timeout_usec, -EINVAL); | |
718db961 | 1769 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1770 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 1771 | |
718db961 LP |
1772 | if (bus->state == BUS_CLOSING) { |
1773 | *timeout_usec = 0; | |
1774 | return 1; | |
1775 | } | |
1776 | ||
e3017af9 LP |
1777 | if (bus->state == BUS_AUTHENTICATING) { |
1778 | *timeout_usec = bus->auth_timeout; | |
1779 | return 1; | |
1780 | } | |
1781 | ||
adee69fa LP |
1782 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1783 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1784 | return 0; |
adee69fa | 1785 | } |
e3017af9 | 1786 | |
8efd6381 LP |
1787 | if (bus->rqueue_size > 0) { |
1788 | *timeout_usec = 0; | |
1789 | return 1; | |
1790 | } | |
1791 | ||
e3017af9 | 1792 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
1793 | if (!c) { |
1794 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1795 | return 0; |
adee69fa | 1796 | } |
e3017af9 LP |
1797 | |
1798 | *timeout_usec = c->timeout; | |
1799 | return 1; | |
1800 | } | |
1801 | ||
1802 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 1803 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 1804 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1805 | struct reply_callback *c; |
1806 | usec_t n; | |
1807 | int r; | |
1808 | ||
1809 | assert(bus); | |
1810 | ||
1811 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1812 | if (!c) | |
1813 | return 0; | |
1814 | ||
1815 | n = now(CLOCK_MONOTONIC); | |
1816 | if (c->timeout > n) | |
1817 | return 0; | |
1818 | ||
eb01ba5d LP |
1819 | r = bus_message_new_synthetic_error( |
1820 | bus, | |
1821 | c->serial, | |
14c24659 | 1822 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
1823 | &m); |
1824 | if (r < 0) | |
1825 | return r; | |
1826 | ||
34a2c9e8 LP |
1827 | m->sender = "org.freedesktop.DBus"; |
1828 | ||
7adc46fc | 1829 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
1830 | if (r < 0) |
1831 | return r; | |
1832 | ||
e3017af9 LP |
1833 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1834 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1835 | ||
718db961 LP |
1836 | bus->current = m; |
1837 | bus->iteration_counter ++; | |
1838 | ||
ebcf1f97 LP |
1839 | r = c->callback(bus, m, c->userdata, &error_buffer); |
1840 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
e3017af9 LP |
1841 | free(c); |
1842 | ||
718db961 LP |
1843 | bus->current = NULL; |
1844 | ||
ebcf1f97 | 1845 | return r; |
e3017af9 LP |
1846 | } |
1847 | ||
9d373862 LP |
1848 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1849 | assert(bus); | |
1850 | assert(m); | |
1851 | ||
1852 | if (bus->state != BUS_HELLO) | |
1853 | return 0; | |
1854 | ||
1855 | /* Let's make sure the first message on the bus is the HELLO | |
1856 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1857 | * here (we leave that to the usual handling), we just verify |
1858 | * we don't let any earlier msg through. */ | |
9d373862 | 1859 | |
40ca29a1 LP |
1860 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1861 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
1862 | return -EIO; |
1863 | ||
1864 | if (m->reply_serial != bus->hello_serial) | |
1865 | return -EIO; | |
1866 | ||
1867 | return 0; | |
1868 | } | |
1869 | ||
a652755d | 1870 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
ebcf1f97 | 1871 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
1872 | struct reply_callback *c; |
1873 | int r; | |
1874 | ||
1875 | assert(bus); | |
1876 | assert(m); | |
1877 | ||
40ca29a1 LP |
1878 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1879 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
1880 | return 0; |
1881 | ||
1882 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1883 | if (!c) | |
1884 | return 0; | |
1885 | ||
1886 | if (c->timeout != 0) | |
1887 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1888 | ||
88fe224c LP |
1889 | r = sd_bus_message_rewind(m, true); |
1890 | if (r < 0) | |
1891 | return r; | |
1892 | ||
ebcf1f97 LP |
1893 | r = c->callback(bus, m, c->userdata, &error_buffer); |
1894 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
a652755d LP |
1895 | free(c); |
1896 | ||
ebcf1f97 | 1897 | return r; |
a652755d LP |
1898 | } |
1899 | ||
1900 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 1901 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
1902 | struct filter_callback *l; |
1903 | int r; | |
1904 | ||
392d5b37 LP |
1905 | assert(bus); |
1906 | assert(m); | |
1907 | ||
7286037f LP |
1908 | do { |
1909 | bus->filter_callbacks_modified = false; | |
1910 | ||
1911 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1912 | ||
1913 | if (bus->filter_callbacks_modified) | |
1914 | break; | |
1915 | ||
1916 | /* Don't run this more than once per iteration */ | |
1917 | if (l->last_iteration == bus->iteration_counter) | |
1918 | continue; | |
1919 | ||
1920 | l->last_iteration = bus->iteration_counter; | |
1921 | ||
88fe224c LP |
1922 | r = sd_bus_message_rewind(m, true); |
1923 | if (r < 0) | |
1924 | return r; | |
1925 | ||
969987ea | 1926 | r = l->callback(bus, m, l->userdata, &error_buffer); |
ebcf1f97 | 1927 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
1928 | if (r != 0) |
1929 | return r; | |
1930 | ||
1931 | } | |
1932 | ||
1933 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1934 | |
1935 | return 0; | |
1936 | } | |
1937 | ||
392d5b37 | 1938 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1939 | int r; |
1940 | ||
392d5b37 LP |
1941 | assert(bus); |
1942 | assert(m); | |
1943 | ||
7286037f LP |
1944 | do { |
1945 | bus->match_callbacks_modified = false; | |
1946 | ||
eb01ba5d | 1947 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1948 | if (r != 0) |
1949 | return r; | |
1950 | ||
1951 | } while (bus->match_callbacks_modified); | |
1952 | ||
1953 | return 0; | |
392d5b37 LP |
1954 | } |
1955 | ||
b9bf7e2b LP |
1956 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1957 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1958 | int r; | |
1959 | ||
1960 | assert(bus); | |
1961 | assert(m); | |
1962 | ||
40ca29a1 | 1963 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
1964 | return 0; |
1965 | ||
1966 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1967 | return 0; | |
1968 | ||
1969 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1970 | return 1; | |
1971 | ||
1972 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 1973 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
1974 | else if (streq_ptr(m->member, "GetMachineId")) { |
1975 | sd_id128_t id; | |
1976 | char sid[33]; | |
1977 | ||
1978 | r = sd_id128_get_machine(&id); | |
1979 | if (r < 0) | |
1980 | return r; | |
1981 | ||
df2d202e | 1982 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
1983 | if (r < 0) |
1984 | return r; | |
1985 | ||
1986 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1987 | } else { | |
29ddb38f | 1988 | r = sd_bus_message_new_method_errorf( |
df2d202e | 1989 | m, &reply, |
40ca29a1 | 1990 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 1991 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
1992 | } |
1993 | ||
1994 | if (r < 0) | |
1995 | return r; | |
1996 | ||
1997 | r = sd_bus_send(bus, reply, NULL); | |
1998 | if (r < 0) | |
1999 | return r; | |
2000 | ||
2001 | return 1; | |
2002 | } | |
2003 | ||
992c052c | 2004 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2005 | int r; |
2006 | ||
2007 | assert(bus); | |
992c052c | 2008 | assert(m); |
e3017af9 | 2009 | |
affff0b6 | 2010 | bus->current = m; |
992c052c | 2011 | bus->iteration_counter++; |
e3017af9 | 2012 | |
40ca29a1 LP |
2013 | log_debug("Got message sender=%s object=%s interface=%s member=%s", |
2014 | strna(sd_bus_message_get_sender(m)), | |
2015 | strna(sd_bus_message_get_path(m)), | |
2016 | strna(sd_bus_message_get_interface(m)), | |
2017 | strna(sd_bus_message_get_member(m))); | |
2018 | ||
992c052c LP |
2019 | r = process_hello(bus, m); |
2020 | if (r != 0) | |
affff0b6 | 2021 | goto finish; |
a652755d | 2022 | |
992c052c LP |
2023 | r = process_reply(bus, m); |
2024 | if (r != 0) | |
affff0b6 | 2025 | goto finish; |
e3017af9 | 2026 | |
992c052c LP |
2027 | r = process_filter(bus, m); |
2028 | if (r != 0) | |
affff0b6 | 2029 | goto finish; |
a652755d | 2030 | |
992c052c LP |
2031 | r = process_match(bus, m); |
2032 | if (r != 0) | |
affff0b6 | 2033 | goto finish; |
a652755d | 2034 | |
992c052c LP |
2035 | r = process_builtin(bus, m); |
2036 | if (r != 0) | |
affff0b6 LP |
2037 | goto finish; |
2038 | ||
2039 | r = bus_process_object(bus, m); | |
a652755d | 2040 | |
affff0b6 LP |
2041 | finish: |
2042 | bus->current = NULL; | |
2043 | return r; | |
29ddb38f | 2044 | } |
88fe224c | 2045 | |
992c052c LP |
2046 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
2047 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 2048 | int r; |
a652755d | 2049 | |
29ddb38f | 2050 | assert(bus); |
992c052c | 2051 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2052 | |
992c052c LP |
2053 | r = process_timeout(bus); |
2054 | if (r != 0) | |
2055 | goto null_message; | |
7286037f | 2056 | |
992c052c LP |
2057 | r = dispatch_wqueue(bus); |
2058 | if (r != 0) | |
2059 | goto null_message; | |
7286037f | 2060 | |
992c052c LP |
2061 | r = dispatch_rqueue(bus, &m); |
2062 | if (r < 0) | |
2063 | return r; | |
2064 | if (!m) | |
2065 | goto null_message; | |
7286037f | 2066 | |
992c052c LP |
2067 | r = process_message(bus, m); |
2068 | if (r != 0) | |
2069 | goto null_message; | |
7286037f | 2070 | |
992c052c LP |
2071 | if (ret) { |
2072 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2073 | if (r < 0) |
2074 | return r; | |
e3017af9 | 2075 | |
992c052c LP |
2076 | *ret = m; |
2077 | m = NULL; | |
2078 | return 1; | |
2079 | } | |
a652755d | 2080 | |
40ca29a1 | 2081 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2082 | |
992c052c | 2083 | r = sd_bus_reply_method_errorf( |
df2d202e | 2084 | m, |
40ca29a1 | 2085 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2086 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2087 | if (r < 0) |
2088 | return r; | |
2089 | } | |
e3017af9 | 2090 | |
992c052c | 2091 | return 1; |
0a72c2bd | 2092 | |
992c052c LP |
2093 | null_message: |
2094 | if (r >= 0 && ret) | |
2095 | *ret = NULL; | |
0a72c2bd | 2096 | |
992c052c | 2097 | return r; |
29ddb38f | 2098 | } |
0a72c2bd | 2099 | |
718db961 LP |
2100 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2101 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2102 | struct reply_callback *c; | |
2103 | int r; | |
2104 | ||
2105 | assert(bus); | |
2106 | assert(bus->state == BUS_CLOSING); | |
2107 | ||
2108 | c = hashmap_first(bus->reply_callbacks); | |
2109 | if (c) { | |
ebcf1f97 LP |
2110 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2111 | ||
718db961 LP |
2112 | /* First, fail all outstanding method calls */ |
2113 | r = bus_message_new_synthetic_error( | |
2114 | bus, | |
2115 | c->serial, | |
14c24659 | 2116 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2117 | &m); |
2118 | if (r < 0) | |
2119 | return r; | |
2120 | ||
7adc46fc | 2121 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2122 | if (r < 0) |
2123 | return r; | |
2124 | ||
2125 | if (c->timeout != 0) | |
2126 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2127 | ||
2128 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
2129 | ||
2130 | bus->current = m; | |
2131 | bus->iteration_counter++; | |
2132 | ||
ebcf1f97 LP |
2133 | r = c->callback(bus, m, c->userdata, &error_buffer); |
2134 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
718db961 LP |
2135 | free(c); |
2136 | ||
718db961 LP |
2137 | goto finish; |
2138 | } | |
2139 | ||
2140 | /* Then, synthesize a Disconnected message */ | |
2141 | r = sd_bus_message_new_signal( | |
2142 | bus, | |
2143 | "/org/freedesktop/DBus/Local", | |
2144 | "org.freedesktop.DBus.Local", | |
2145 | "Disconnected", | |
2146 | &m); | |
2147 | if (r < 0) | |
2148 | return r; | |
2149 | ||
34a2c9e8 LP |
2150 | m->sender = "org.freedesktop.DBus.Local"; |
2151 | ||
7adc46fc | 2152 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2153 | if (r < 0) |
2154 | return r; | |
2155 | ||
2156 | sd_bus_close(bus); | |
2157 | ||
2158 | bus->current = m; | |
2159 | bus->iteration_counter++; | |
2160 | ||
2161 | r = process_filter(bus, m); | |
2162 | if (r != 0) | |
2163 | goto finish; | |
2164 | ||
2165 | r = process_match(bus, m); | |
2166 | if (r != 0) | |
2167 | goto finish; | |
2168 | ||
2169 | if (ret) { | |
2170 | *ret = m; | |
2171 | m = NULL; | |
2172 | } | |
2173 | ||
2174 | r = 1; | |
2175 | ||
2176 | finish: | |
2177 | bus->current = NULL; | |
2178 | return r; | |
2179 | } | |
2180 | ||
d9f644e2 | 2181 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 2182 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2183 | int r; |
0a72c2bd | 2184 | |
992c052c LP |
2185 | /* Returns 0 when we didn't do anything. This should cause the |
2186 | * caller to invoke sd_bus_wait() before returning the next | |
2187 | * time. Returns > 0 when we did something, which possibly | |
2188 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2189 | |
d6888822 LP |
2190 | assert_return(bus, -EINVAL); |
2191 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2192 | |
992c052c | 2193 | /* We don't allow recursively invoking sd_bus_process(). */ |
718db961 | 2194 | assert_return(!bus->current, -EBUSY); |
0a72c2bd | 2195 | |
992c052c | 2196 | switch (bus->state) { |
0a72c2bd | 2197 | |
992c052c LP |
2198 | case BUS_UNSET: |
2199 | case BUS_CLOSED: | |
2200 | return -ENOTCONN; | |
0a72c2bd | 2201 | |
992c052c LP |
2202 | case BUS_OPENING: |
2203 | r = bus_socket_process_opening(bus); | |
32f46480 | 2204 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2205 | bus_enter_closing(bus); |
2206 | r = 1; | |
2207 | } else if (r < 0) | |
29ddb38f | 2208 | return r; |
992c052c LP |
2209 | if (ret) |
2210 | *ret = NULL; | |
a652755d LP |
2211 | return r; |
2212 | ||
992c052c | 2213 | case BUS_AUTHENTICATING: |
992c052c | 2214 | r = bus_socket_process_authenticating(bus); |
32f46480 | 2215 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2216 | bus_enter_closing(bus); |
2217 | r = 1; | |
2218 | } else if (r < 0) | |
29ddb38f | 2219 | return r; |
718db961 | 2220 | |
992c052c LP |
2221 | if (ret) |
2222 | *ret = NULL; | |
718db961 | 2223 | |
992c052c | 2224 | return r; |
a652755d | 2225 | |
992c052c LP |
2226 | case BUS_RUNNING: |
2227 | case BUS_HELLO: | |
992c052c | 2228 | r = process_running(bus, ret); |
32f46480 | 2229 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2230 | bus_enter_closing(bus); |
2231 | r = 1; | |
2232 | ||
2233 | if (ret) | |
2234 | *ret = NULL; | |
2235 | } | |
43a43f50 | 2236 | |
43a43f50 | 2237 | return r; |
718db961 LP |
2238 | |
2239 | case BUS_CLOSING: | |
2240 | return process_closing(bus, ret); | |
992c052c | 2241 | } |
43a43f50 | 2242 | |
992c052c | 2243 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2244 | } |
2245 | ||
992c052c LP |
2246 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2247 | struct pollfd p[2] = {}; | |
2248 | int r, e, n; | |
2249 | struct timespec ts; | |
8efd6381 | 2250 | usec_t m = (usec_t) -1; |
adcdb374 LP |
2251 | |
2252 | assert(bus); | |
718db961 LP |
2253 | |
2254 | if (bus->state == BUS_CLOSING) | |
2255 | return 1; | |
2256 | ||
d6888822 | 2257 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 2258 | |
992c052c LP |
2259 | e = sd_bus_get_events(bus); |
2260 | if (e < 0) | |
2261 | return e; | |
adcdb374 | 2262 | |
992c052c | 2263 | if (need_more) |
8efd6381 LP |
2264 | /* The caller really needs some more data, he doesn't |
2265 | * care about what's already read, or any timeouts | |
2266 | * except its own.*/ | |
992c052c | 2267 | e |= POLLIN; |
992c052c | 2268 | else { |
8efd6381 LP |
2269 | usec_t until; |
2270 | /* The caller wants to process if there's something to | |
2271 | * process, but doesn't care otherwise */ | |
2272 | ||
2273 | r = sd_bus_get_timeout(bus, &until); | |
2274 | if (r < 0) | |
2275 | return r; | |
2276 | if (r > 0) { | |
2277 | usec_t nw; | |
2278 | nw = now(CLOCK_MONOTONIC); | |
2279 | m = until > nw ? until - nw : 0; | |
2280 | } | |
992c052c | 2281 | } |
adcdb374 | 2282 | |
992c052c LP |
2283 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2284 | m = timeout_usec; | |
adcdb374 | 2285 | |
992c052c LP |
2286 | p[0].fd = bus->input_fd; |
2287 | if (bus->output_fd == bus->input_fd) { | |
2288 | p[0].events = e; | |
2289 | n = 1; | |
2290 | } else { | |
2291 | p[0].events = e & POLLIN; | |
2292 | p[1].fd = bus->output_fd; | |
2293 | p[1].events = e & POLLOUT; | |
2294 | n = 2; | |
adcdb374 LP |
2295 | } |
2296 | ||
992c052c | 2297 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2298 | if (r < 0) |
992c052c | 2299 | return -errno; |
adcdb374 | 2300 | |
992c052c | 2301 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2302 | } |
2303 | ||
d9f644e2 | 2304 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2305 | |
d6888822 | 2306 | assert_return(bus, -EINVAL); |
d6888822 | 2307 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2308 | |
718db961 LP |
2309 | if (bus->state == BUS_CLOSING) |
2310 | return 0; | |
2311 | ||
2312 | assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN); | |
2313 | ||
992c052c LP |
2314 | if (bus->rqueue_size > 0) |
2315 | return 0; | |
9db76355 | 2316 | |
992c052c LP |
2317 | return bus_poll(bus, false, timeout_usec); |
2318 | } | |
9db76355 | 2319 | |
d9f644e2 | 2320 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2321 | int r; |
9db76355 | 2322 | |
d6888822 | 2323 | assert_return(bus, -EINVAL); |
d6888822 | 2324 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2325 | |
718db961 LP |
2326 | if (bus->state == BUS_CLOSING) |
2327 | return 0; | |
2328 | ||
2329 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2330 | ||
992c052c LP |
2331 | r = bus_ensure_running(bus); |
2332 | if (r < 0) | |
2333 | return r; | |
9db76355 | 2334 | |
992c052c LP |
2335 | if (bus->wqueue_size <= 0) |
2336 | return 0; | |
9db76355 | 2337 | |
992c052c LP |
2338 | for (;;) { |
2339 | r = dispatch_wqueue(bus); | |
32f46480 LP |
2340 | if (r < 0) { |
2341 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
2342 | bus_enter_closing(bus); | |
2343 | ||
9db76355 | 2344 | return r; |
32f46480 | 2345 | } |
9db76355 | 2346 | |
992c052c LP |
2347 | if (bus->wqueue_size <= 0) |
2348 | return 0; | |
9db76355 | 2349 | |
992c052c | 2350 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2351 | if (r < 0) |
2352 | return r; | |
9db76355 | 2353 | } |
9db76355 LP |
2354 | } |
2355 | ||
d9f644e2 ZJS |
2356 | _public_ int sd_bus_add_filter(sd_bus *bus, |
2357 | sd_bus_message_handler_t callback, | |
2358 | void *userdata) { | |
2359 | ||
992c052c | 2360 | struct filter_callback *f; |
de1c301e | 2361 | |
d6888822 LP |
2362 | assert_return(bus, -EINVAL); |
2363 | assert_return(callback, -EINVAL); | |
2364 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2365 | |
992c052c LP |
2366 | f = new0(struct filter_callback, 1); |
2367 | if (!f) | |
29ddb38f | 2368 | return -ENOMEM; |
992c052c LP |
2369 | f->callback = callback; |
2370 | f->userdata = userdata; | |
29ddb38f | 2371 | |
992c052c | 2372 | bus->filter_callbacks_modified = true; |
71fda00f | 2373 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2374 | return 0; |
2375 | } | |
a652755d | 2376 | |
d9f644e2 ZJS |
2377 | _public_ int sd_bus_remove_filter(sd_bus *bus, |
2378 | sd_bus_message_handler_t callback, | |
2379 | void *userdata) { | |
2380 | ||
992c052c | 2381 | struct filter_callback *f; |
a652755d | 2382 | |
d6888822 LP |
2383 | assert_return(bus, -EINVAL); |
2384 | assert_return(callback, -EINVAL); | |
2385 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2386 | |
992c052c LP |
2387 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2388 | if (f->callback == callback && f->userdata == userdata) { | |
2389 | bus->filter_callbacks_modified = true; | |
71fda00f | 2390 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2391 | free(f); |
2392 | return 1; | |
29ddb38f LP |
2393 | } |
2394 | } | |
2395 | ||
992c052c | 2396 | return 0; |
a652755d | 2397 | } |
392d5b37 | 2398 | |
d9f644e2 ZJS |
2399 | _public_ int sd_bus_add_match(sd_bus *bus, |
2400 | const char *match, | |
2401 | sd_bus_message_handler_t callback, | |
2402 | void *userdata) { | |
2403 | ||
992c052c LP |
2404 | struct bus_match_component *components = NULL; |
2405 | unsigned n_components = 0; | |
2406 | uint64_t cookie = 0; | |
2407 | int r = 0; | |
392d5b37 | 2408 | |
d6888822 LP |
2409 | assert_return(bus, -EINVAL); |
2410 | assert_return(match, -EINVAL); | |
2411 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2412 | |
992c052c LP |
2413 | r = bus_match_parse(match, &components, &n_components); |
2414 | if (r < 0) | |
2415 | goto finish; | |
29ddb38f | 2416 | |
992c052c LP |
2417 | if (bus->bus_client) { |
2418 | cookie = ++bus->match_cookie; | |
29ddb38f | 2419 | |
992c052c LP |
2420 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2421 | if (r < 0) | |
2422 | goto finish; | |
392d5b37 LP |
2423 | } |
2424 | ||
992c052c LP |
2425 | bus->match_callbacks_modified = true; |
2426 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2427 | if (r < 0) { |
992c052c LP |
2428 | if (bus->bus_client) |
2429 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2430 | } |
917b5dc7 | 2431 | |
992c052c LP |
2432 | finish: |
2433 | bus_match_parse_free(components, n_components); | |
2434 | return r; | |
917b5dc7 LP |
2435 | } |
2436 | ||
d9f644e2 ZJS |
2437 | _public_ int sd_bus_remove_match(sd_bus *bus, |
2438 | const char *match, | |
2439 | sd_bus_message_handler_t callback, | |
2440 | void *userdata) { | |
2441 | ||
992c052c LP |
2442 | struct bus_match_component *components = NULL; |
2443 | unsigned n_components = 0; | |
2444 | int r = 0, q = 0; | |
2445 | uint64_t cookie = 0; | |
917b5dc7 | 2446 | |
d6888822 LP |
2447 | assert_return(bus, -EINVAL); |
2448 | assert_return(match, -EINVAL); | |
2449 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2450 | |
992c052c | 2451 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2452 | if (r < 0) |
2453 | return r; | |
f10dda3b | 2454 | |
992c052c LP |
2455 | bus->match_callbacks_modified = true; |
2456 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2457 | |
992c052c LP |
2458 | if (bus->bus_client) |
2459 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2460 | |
992c052c | 2461 | bus_match_parse_free(components, n_components); |
f10dda3b | 2462 | |
992c052c | 2463 | return r < 0 ? r : q; |
f10dda3b LP |
2464 | } |
2465 | ||
992c052c LP |
2466 | bool bus_pid_changed(sd_bus *bus) { |
2467 | assert(bus); | |
f10dda3b | 2468 | |
992c052c LP |
2469 | /* We don't support people creating a bus connection and |
2470 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2471 | |
992c052c | 2472 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2473 | } |
40ca29a1 LP |
2474 | |
2475 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2476 | sd_bus *bus = userdata; |
40ca29a1 LP |
2477 | int r; |
2478 | ||
2479 | assert(bus); | |
2480 | ||
2481 | r = sd_bus_process(bus, NULL); | |
2482 | if (r < 0) | |
2483 | return r; | |
2484 | ||
2485 | return 1; | |
2486 | } | |
2487 | ||
2488 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2489 | sd_bus *bus = userdata; |
40ca29a1 LP |
2490 | int r; |
2491 | ||
2492 | assert(bus); | |
2493 | ||
2494 | r = sd_bus_process(bus, NULL); | |
2495 | if (r < 0) | |
2496 | return r; | |
2497 | ||
2498 | return 1; | |
2499 | } | |
2500 | ||
2501 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2502 | sd_bus *bus = userdata; | |
2503 | int r, e; | |
2504 | usec_t until; | |
2505 | ||
2506 | assert(s); | |
2507 | assert(bus); | |
2508 | ||
2509 | e = sd_bus_get_events(bus); | |
2510 | if (e < 0) | |
2511 | return e; | |
2512 | ||
2513 | if (bus->output_fd != bus->input_fd) { | |
2514 | ||
2515 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2516 | if (r < 0) | |
2517 | return r; | |
2518 | ||
2519 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2520 | if (r < 0) | |
2521 | return r; | |
2522 | } else { | |
2523 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2524 | if (r < 0) | |
2525 | return r; | |
2526 | } | |
2527 | ||
2528 | r = sd_bus_get_timeout(bus, &until); | |
2529 | if (r < 0) | |
2530 | return r; | |
2531 | if (r > 0) { | |
2532 | int j; | |
2533 | ||
2534 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2535 | if (j < 0) | |
2536 | return j; | |
2537 | } | |
2538 | ||
2539 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2540 | if (r < 0) | |
2541 | return r; | |
2542 | ||
2543 | return 1; | |
2544 | } | |
2545 | ||
abc5fe72 LP |
2546 | static int quit_callback(sd_event_source *event, void *userdata) { |
2547 | sd_bus *bus = userdata; | |
2548 | ||
2549 | assert(event); | |
2550 | ||
2551 | sd_bus_flush(bus); | |
2552 | ||
2553 | return 1; | |
2554 | } | |
2555 | ||
d9f644e2 | 2556 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
2557 | int r; |
2558 | ||
2559 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
2560 | assert_return(!bus->event, -EBUSY); |
2561 | ||
2562 | assert(!bus->input_io_event_source); | |
2563 | assert(!bus->output_io_event_source); | |
2564 | assert(!bus->time_event_source); | |
2565 | ||
76b54375 LP |
2566 | if (event) |
2567 | bus->event = sd_event_ref(event); | |
2568 | else { | |
2569 | r = sd_event_default(&bus->event); | |
2570 | if (r < 0) | |
2571 | return r; | |
2572 | } | |
40ca29a1 | 2573 | |
76b54375 | 2574 | r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); |
40ca29a1 LP |
2575 | if (r < 0) |
2576 | goto fail; | |
2577 | ||
2578 | r = sd_event_source_set_priority(bus->input_io_event_source, priority); | |
2579 | if (r < 0) | |
2580 | goto fail; | |
2581 | ||
2582 | if (bus->output_fd != bus->input_fd) { | |
76b54375 | 2583 | r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); |
40ca29a1 LP |
2584 | if (r < 0) |
2585 | goto fail; | |
2586 | ||
2587 | r = sd_event_source_set_priority(bus->output_io_event_source, priority); | |
2588 | if (r < 0) | |
2589 | goto fail; | |
2590 | } | |
2591 | ||
2592 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2593 | if (r < 0) | |
2594 | goto fail; | |
2595 | ||
76b54375 | 2596 | r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source); |
40ca29a1 LP |
2597 | if (r < 0) |
2598 | goto fail; | |
2599 | ||
2600 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2601 | if (r < 0) | |
2602 | goto fail; | |
2603 | ||
76b54375 | 2604 | r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source); |
abc5fe72 LP |
2605 | if (r < 0) |
2606 | goto fail; | |
2607 | ||
40ca29a1 LP |
2608 | return 0; |
2609 | ||
2610 | fail: | |
2611 | sd_bus_detach_event(bus); | |
2612 | return r; | |
2613 | } | |
2614 | ||
d9f644e2 | 2615 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 LP |
2616 | assert_return(bus, -EINVAL); |
2617 | assert_return(bus->event, -ENXIO); | |
2618 | ||
86befb40 LP |
2619 | if (bus->input_io_event_source) { |
2620 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2621 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); |
86befb40 | 2622 | } |
40ca29a1 | 2623 | |
86befb40 LP |
2624 | if (bus->output_io_event_source) { |
2625 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2626 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); |
86befb40 | 2627 | } |
40ca29a1 | 2628 | |
86befb40 LP |
2629 | if (bus->time_event_source) { |
2630 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2631 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 2632 | } |
40ca29a1 | 2633 | |
86befb40 LP |
2634 | if (bus->quit_event_source) { |
2635 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 2636 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 2637 | } |
abc5fe72 | 2638 | |
40ca29a1 LP |
2639 | if (bus->event) |
2640 | bus->event = sd_event_unref(bus->event); | |
2641 | ||
2642 | return 0; | |
2643 | } | |
affff0b6 | 2644 | |
2be44176 LP |
2645 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
2646 | assert_return(bus, NULL); | |
2647 | ||
2648 | return bus->event; | |
2649 | } | |
2650 | ||
76b54375 | 2651 | _public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) { |
affff0b6 LP |
2652 | assert_return(bus, NULL); |
2653 | ||
2654 | return bus->current; | |
2655 | } | |
76b54375 LP |
2656 | |
2657 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { | |
2658 | sd_bus *b = NULL; | |
2659 | int r; | |
2660 | ||
2661 | assert(bus_open); | |
2662 | assert(default_bus); | |
2663 | ||
2664 | if (!ret) | |
2665 | return !!*default_bus; | |
2666 | ||
2667 | if (*default_bus) { | |
2668 | *ret = sd_bus_ref(*default_bus); | |
2669 | return 0; | |
2670 | } | |
2671 | ||
2672 | r = bus_open(&b); | |
2673 | if (r < 0) | |
2674 | return r; | |
2675 | ||
2676 | b->default_bus_ptr = default_bus; | |
2677 | b->tid = gettid(); | |
2678 | *default_bus = b; | |
2679 | ||
2680 | *ret = b; | |
2681 | return 1; | |
2682 | } | |
2683 | ||
2684 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
2685 | static __thread sd_bus *default_system_bus = NULL; | |
2686 | ||
2687 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
2688 | } | |
2689 | ||
2690 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
2691 | static __thread sd_bus *default_user_bus = NULL; | |
2692 | ||
2693 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
2694 | } | |
2695 | ||
2696 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { | |
2697 | assert_return(b, -EINVAL); | |
2698 | assert_return(tid, -EINVAL); | |
2699 | assert_return(!bus_pid_changed(b), -ECHILD); | |
2700 | ||
2701 | if (b->tid != 0) { | |
2702 | *tid = b->tid; | |
2703 | return 0; | |
2704 | } | |
2705 | ||
2706 | if (b->event) | |
2707 | return sd_event_get_tid(b->event, tid); | |
2708 | ||
2709 | return -ENXIO; | |
2710 | } | |
28383ba1 LP |
2711 | |
2712 | _public_ char *sd_bus_label_escape(const char *s) { | |
2713 | char *r, *t; | |
2714 | const char *f; | |
2715 | ||
2716 | assert_return(s, NULL); | |
2717 | ||
2718 | /* Escapes all chars that D-Bus' object path cannot deal | |
2719 | * with. Can be reversed with bus_path_unescape(). We special | |
2720 | * case the empty string. */ | |
2721 | ||
2722 | if (*s == 0) | |
2723 | return strdup("_"); | |
2724 | ||
2725 | r = new(char, strlen(s)*3 + 1); | |
2726 | if (!r) | |
2727 | return NULL; | |
2728 | ||
2729 | for (f = s, t = r; *f; f++) { | |
2730 | ||
2731 | /* Escape everything that is not a-zA-Z0-9. We also | |
2732 | * escape 0-9 if it's the first character */ | |
2733 | ||
2734 | if (!(*f >= 'A' && *f <= 'Z') && | |
2735 | !(*f >= 'a' && *f <= 'z') && | |
2736 | !(f > s && *f >= '0' && *f <= '9')) { | |
2737 | *(t++) = '_'; | |
2738 | *(t++) = hexchar(*f >> 4); | |
2739 | *(t++) = hexchar(*f); | |
2740 | } else | |
2741 | *(t++) = *f; | |
2742 | } | |
2743 | ||
2744 | *t = 0; | |
2745 | ||
2746 | return r; | |
2747 | } | |
2748 | ||
2749 | _public_ char *sd_bus_label_unescape(const char *f) { | |
2750 | char *r, *t; | |
2751 | ||
2752 | assert_return(f, NULL); | |
2753 | ||
2754 | /* Special case for the empty string */ | |
2755 | if (streq(f, "_")) | |
2756 | return strdup(""); | |
2757 | ||
2758 | r = new(char, strlen(f) + 1); | |
2759 | if (!r) | |
2760 | return NULL; | |
2761 | ||
2762 | for (t = r; *f; f++) { | |
2763 | ||
2764 | if (*f == '_') { | |
2765 | int a, b; | |
2766 | ||
2767 | if ((a = unhexchar(f[1])) < 0 || | |
2768 | (b = unhexchar(f[2])) < 0) { | |
2769 | /* Invalid escape code, let's take it literal then */ | |
2770 | *(t++) = '_'; | |
2771 | } else { | |
2772 | *(t++) = (char) ((a << 4) | b); | |
2773 | f += 2; | |
2774 | } | |
2775 | } else | |
2776 | *(t++) = *f; | |
2777 | } | |
2778 | ||
2779 | *t = 0; | |
2780 | ||
2781 | return r; | |
2782 | } | |
5b12334d LP |
2783 | |
2784 | _public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { | |
2785 | sd_bus_creds *c; | |
2786 | pid_t pid = 0; | |
2787 | int r; | |
2788 | ||
2789 | assert_return(bus, -EINVAL); | |
2790 | assert_return(mask <= _SD_BUS_CREDS_MAX, -ENOTSUP); | |
2791 | assert_return(ret, -EINVAL); | |
2792 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2793 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2794 | assert_return(!bus->is_kernel, -ENOTSUP); | |
2795 | ||
2796 | if (!bus->ucred_valid && !isempty(bus->label)) | |
2797 | return -ENODATA; | |
2798 | ||
2799 | c = bus_creds_new(); | |
2800 | if (!c) | |
2801 | return -ENOMEM; | |
2802 | ||
2803 | if (bus->ucred_valid) { | |
2804 | pid = c->pid = bus->ucred.pid; | |
2805 | c->uid = bus->ucred.uid; | |
2806 | c->gid = bus->ucred.gid; | |
2807 | ||
2808 | c->mask |= ((SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask) & bus->creds_mask; | |
2809 | } | |
2810 | ||
2811 | if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) { | |
2812 | c->label = strdup(bus->label); | |
2813 | if (!c->label) { | |
2814 | sd_bus_creds_unref(c); | |
2815 | return -ENOMEM; | |
2816 | } | |
2817 | ||
2818 | c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT | bus->creds_mask; | |
2819 | } | |
2820 | ||
2821 | r = bus_creds_add_more(c, mask, pid, 0); | |
2822 | if (r < 0) | |
2823 | return r; | |
2824 | ||
2825 | *ret = c; | |
2826 | return 0; | |
2827 | } |