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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" |
0461f8cd | 50 | #include "bus-protocol.h" |
de1c301e | 51 | |
e3017af9 LP |
52 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
53 | ||
f54514f3 LP |
54 | static void bus_close_fds(sd_bus *b) { |
55 | assert(b); | |
56 | ||
57 | if (b->input_fd >= 0) | |
58 | close_nointr_nofail(b->input_fd); | |
59 | ||
60 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
61 | close_nointr_nofail(b->output_fd); | |
62 | ||
63 | b->input_fd = b->output_fd = -1; | |
64 | } | |
65 | ||
29ddb38f LP |
66 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
67 | struct node_callback *c; | |
68 | struct node_vtable *v; | |
69 | struct node_enumerator *e; | |
70 | ||
71 | assert(b); | |
72 | ||
73 | if (!n) | |
74 | return; | |
75 | ||
76 | while (n->child) | |
77 | bus_node_destroy(b, n->child); | |
78 | ||
79 | while ((c = n->callbacks)) { | |
71fda00f | 80 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
81 | free(c); |
82 | } | |
83 | ||
84 | while ((v = n->vtables)) { | |
71fda00f | 85 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
86 | free(v->interface); |
87 | free(v); | |
88 | } | |
89 | ||
90 | while ((e = n->enumerators)) { | |
71fda00f | 91 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
92 | free(e); |
93 | } | |
94 | ||
95 | if (n->parent) | |
71fda00f | 96 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
97 | |
98 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
99 | free(n->path); | |
100 | free(n); | |
101 | } | |
102 | ||
0e586eae LP |
103 | static void bus_reset_queues(sd_bus *b) { |
104 | unsigned i; | |
105 | ||
106 | assert(b); | |
107 | ||
108 | for (i = 0; i < b->rqueue_size; i++) | |
109 | sd_bus_message_unref(b->rqueue[i]); | |
110 | free(b->rqueue); | |
111 | ||
112 | for (i = 0; i < b->wqueue_size; i++) | |
113 | sd_bus_message_unref(b->wqueue[i]); | |
114 | free(b->wqueue); | |
115 | ||
116 | b->rqueue = b->wqueue = NULL; | |
117 | b->rqueue_size = b->wqueue_size = 0; | |
118 | } | |
119 | ||
de1c301e LP |
120 | static void bus_free(sd_bus *b) { |
121 | struct filter_callback *f; | |
29ddb38f | 122 | struct node *n; |
de1c301e LP |
123 | |
124 | assert(b); | |
125 | ||
40ca29a1 LP |
126 | sd_bus_detach_event(b); |
127 | ||
f54514f3 | 128 | bus_close_fds(b); |
de1c301e | 129 | |
63edf05e LP |
130 | if (b->kdbus_buffer) |
131 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
132 | ||
de1c301e | 133 | free(b->rbuffer); |
89ffcd2a | 134 | free(b->unique_name); |
2181a7f5 | 135 | free(b->auth_buffer); |
89ffcd2a | 136 | free(b->address); |
e9a967f9 | 137 | free(b->kernel); |
a7893c6b | 138 | free(b->machine); |
89ffcd2a | 139 | |
2fd9ae2e LP |
140 | free(b->exec_path); |
141 | strv_free(b->exec_argv); | |
142 | ||
2c93b4ef LP |
143 | close_many(b->fds, b->n_fds); |
144 | free(b->fds); | |
145 | ||
0e586eae | 146 | bus_reset_queues(b); |
de1c301e LP |
147 | |
148 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 149 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
150 | |
151 | while ((f = b->filter_callbacks)) { | |
71fda00f | 152 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
153 | free(f); |
154 | } | |
155 | ||
392d5b37 LP |
156 | bus_match_free(&b->match_callbacks); |
157 | ||
29ddb38f LP |
158 | hashmap_free_free(b->vtable_methods); |
159 | hashmap_free_free(b->vtable_properties); | |
160 | ||
161 | while ((n = hashmap_first(b->nodes))) | |
162 | bus_node_destroy(b, n); | |
163 | ||
164 | hashmap_free(b->nodes); | |
165 | ||
bc7fd8cd LP |
166 | bus_kernel_flush_memfd(b); |
167 | ||
45fbe937 LP |
168 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
169 | ||
de1c301e LP |
170 | free(b); |
171 | } | |
172 | ||
d9f644e2 | 173 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
174 | sd_bus *r; |
175 | ||
d6888822 | 176 | assert_return(ret, -EINVAL); |
021a1e78 | 177 | |
de1c301e LP |
178 | r = new0(sd_bus, 1); |
179 | if (!r) | |
021a1e78 | 180 | return -ENOMEM; |
de1c301e | 181 | |
e4ee6e5c | 182 | r->n_ref = REFCNT_INIT; |
e82c9509 | 183 | r->input_fd = r->output_fd = -1; |
de1c301e | 184 | r->message_version = 1; |
3310dfd5 | 185 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
d21a7bb1 DM |
186 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
187 | r->attach_flags |= KDBUS_ATTACH_NAMES; | |
d5a2b9a6 | 188 | r->original_pid = getpid(); |
de1c301e | 189 | |
45fbe937 LP |
190 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
191 | ||
de1c301e LP |
192 | /* We guarantee that wqueue always has space for at least one |
193 | * entry */ | |
194 | r->wqueue = new(sd_bus_message*, 1); | |
195 | if (!r->wqueue) { | |
196 | free(r); | |
021a1e78 | 197 | return -ENOMEM; |
de1c301e LP |
198 | } |
199 | ||
021a1e78 LP |
200 | *ret = r; |
201 | return 0; | |
202 | } | |
203 | ||
d9f644e2 | 204 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
205 | char *a; |
206 | ||
d6888822 LP |
207 | assert_return(bus, -EINVAL); |
208 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
209 | assert_return(address, -EINVAL); | |
210 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
211 | |
212 | a = strdup(address); | |
213 | if (!a) | |
214 | return -ENOMEM; | |
215 | ||
216 | free(bus->address); | |
217 | bus->address = a; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
d9f644e2 | 222 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
223 | assert_return(bus, -EINVAL); |
224 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
225 | assert_return(input_fd >= 0, -EINVAL); | |
226 | assert_return(output_fd >= 0, -EINVAL); | |
227 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 228 | |
e82c9509 LP |
229 | bus->input_fd = input_fd; |
230 | bus->output_fd = output_fd; | |
021a1e78 LP |
231 | return 0; |
232 | } | |
233 | ||
d9f644e2 | 234 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
235 | char *p, **a; |
236 | ||
d6888822 LP |
237 | assert_return(bus, -EINVAL); |
238 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
239 | assert_return(path, -EINVAL); | |
240 | assert_return(!strv_isempty(argv), -EINVAL); | |
241 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
242 | |
243 | p = strdup(path); | |
244 | if (!p) | |
245 | return -ENOMEM; | |
246 | ||
247 | a = strv_copy(argv); | |
248 | if (!a) { | |
249 | free(p); | |
250 | return -ENOMEM; | |
251 | } | |
252 | ||
253 | free(bus->exec_path); | |
254 | strv_free(bus->exec_argv); | |
255 | ||
256 | bus->exec_path = p; | |
257 | bus->exec_argv = a; | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
d9f644e2 | 262 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
263 | assert_return(bus, -EINVAL); |
264 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
265 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 266 | |
94bbf1ba | 267 | bus->bus_client = !!b; |
021a1e78 LP |
268 | return 0; |
269 | } | |
270 | ||
d9f644e2 | 271 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
272 | assert_return(bus, -EINVAL); |
273 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
274 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 275 | |
264ad849 LP |
276 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
277 | return 0; | |
278 | } | |
279 | ||
f21326e6 | 280 | _public_ int sd_bus_negotiate_attach_timestamp(sd_bus *bus, int b) { |
16be4368 KS |
281 | assert_return(bus, -EINVAL); |
282 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
283 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
284 | ||
d21a7bb1 | 285 | SET_FLAG(bus->attach_flags, KDBUS_ATTACH_TIMESTAMP, b); |
16be4368 KS |
286 | return 0; |
287 | } | |
288 | ||
5b12334d | 289 | _public_ int sd_bus_negotiate_attach_creds(sd_bus *bus, uint64_t mask) { |
16be4368 | 290 | assert_return(bus, -EINVAL); |
95c4fe82 | 291 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
16be4368 KS |
292 | assert_return(bus->state == BUS_UNSET, -EPERM); |
293 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
294 | ||
49b832c5 | 295 | /* The well knowns we need unconditionally, so that matches can work */ |
3310dfd5 | 296 | bus->creds_mask = mask | SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
49b832c5 | 297 | |
3310dfd5 | 298 | return kdbus_translate_attach_flags(bus->creds_mask, &bus->creds_mask); |
021a1e78 | 299 | } |
de1c301e | 300 | |
d9f644e2 | 301 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
302 | assert_return(bus, -EINVAL); |
303 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
304 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
305 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
306 | |
307 | bus->is_server = !!b; | |
98178d39 | 308 | bus->server_id = server_id; |
2181a7f5 LP |
309 | return 0; |
310 | } | |
311 | ||
d9f644e2 | 312 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
313 | assert_return(bus, -EINVAL); |
314 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
315 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
316 | |
317 | bus->anonymous_auth = !!b; | |
318 | return 0; | |
319 | } | |
320 | ||
adacb957 LP |
321 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
322 | assert_return(bus, -EINVAL); | |
323 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
324 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
325 | ||
326 | bus->trusted = !!b; | |
327 | return 0; | |
328 | } | |
329 | ||
ebcf1f97 | 330 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e LP |
331 | const char *s; |
332 | int r; | |
333 | ||
334 | assert(bus); | |
c99c09a2 | 335 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e LP |
336 | assert(reply); |
337 | ||
40ca29a1 | 338 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
339 | if (r < 0) |
340 | return r; | |
40ca29a1 LP |
341 | if (r > 0) |
342 | return -r; | |
eb01ba5d | 343 | |
de1c301e LP |
344 | r = sd_bus_message_read(reply, "s", &s); |
345 | if (r < 0) | |
346 | return r; | |
347 | ||
dafb7591 LP |
348 | if (!service_name_is_valid(s) || s[0] != ':') |
349 | return -EBADMSG; | |
350 | ||
de1c301e LP |
351 | bus->unique_name = strdup(s); |
352 | if (!bus->unique_name) | |
353 | return -ENOMEM; | |
354 | ||
c99c09a2 LP |
355 | if (bus->state == BUS_HELLO) |
356 | bus->state = BUS_RUNNING; | |
dafb7591 | 357 | |
de1c301e LP |
358 | return 1; |
359 | } | |
360 | ||
361 | static int bus_send_hello(sd_bus *bus) { | |
362 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
363 | int r; | |
364 | ||
365 | assert(bus); | |
366 | ||
6629161f | 367 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
368 | return 0; |
369 | ||
de1c301e LP |
370 | r = sd_bus_message_new_method_call( |
371 | bus, | |
372 | "org.freedesktop.DBus", | |
373 | "/", | |
374 | "org.freedesktop.DBus", | |
375 | "Hello", | |
376 | &m); | |
377 | if (r < 0) | |
378 | return r; | |
379 | ||
c49b30a2 | 380 | return sd_bus_call_async(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
381 | } |
382 | ||
a7e3212d | 383 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
384 | assert(bus); |
385 | ||
f08838da | 386 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 387 | bus->state = BUS_HELLO; |
e3017af9 | 388 | return 1; |
de1c301e LP |
389 | } |
390 | ||
391 | bus->state = BUS_RUNNING; | |
e3017af9 | 392 | return 1; |
de1c301e LP |
393 | } |
394 | ||
395 | static int parse_address_key(const char **p, const char *key, char **value) { | |
396 | size_t l, n = 0; | |
397 | const char *a; | |
398 | char *r = NULL; | |
399 | ||
400 | assert(p); | |
401 | assert(*p); | |
de1c301e LP |
402 | assert(value); |
403 | ||
2fd9ae2e LP |
404 | if (key) { |
405 | l = strlen(key); | |
406 | if (strncmp(*p, key, l) != 0) | |
407 | return 0; | |
de1c301e | 408 | |
2fd9ae2e LP |
409 | if ((*p)[l] != '=') |
410 | return 0; | |
de1c301e | 411 | |
2fd9ae2e LP |
412 | if (*value) |
413 | return -EINVAL; | |
de1c301e | 414 | |
2fd9ae2e LP |
415 | a = *p + l + 1; |
416 | } else | |
417 | a = *p; | |
418 | ||
419 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
420 | char c, *t; |
421 | ||
422 | if (*a == '%') { | |
423 | int x, y; | |
424 | ||
425 | x = unhexchar(a[1]); | |
426 | if (x < 0) { | |
427 | free(r); | |
428 | return x; | |
429 | } | |
430 | ||
431 | y = unhexchar(a[2]); | |
432 | if (y < 0) { | |
433 | free(r); | |
434 | return y; | |
435 | } | |
436 | ||
de1c301e | 437 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
438 | a += 3; |
439 | } else { | |
de1c301e | 440 | c = *a; |
89ffcd2a LP |
441 | a++; |
442 | } | |
de1c301e | 443 | |
89ffcd2a | 444 | t = realloc(r, n + 2); |
de1c301e LP |
445 | if (!t) { |
446 | free(r); | |
447 | return -ENOMEM; | |
448 | } | |
449 | ||
450 | r = t; | |
451 | r[n++] = c; | |
452 | } | |
453 | ||
89ffcd2a LP |
454 | if (!r) { |
455 | r = strdup(""); | |
456 | if (!r) | |
457 | return -ENOMEM; | |
458 | } else | |
459 | r[n] = 0; | |
460 | ||
461 | if (*a == ',') | |
462 | a++; | |
463 | ||
de1c301e | 464 | *p = a; |
2fd9ae2e LP |
465 | |
466 | free(*value); | |
de1c301e | 467 | *value = r; |
2fd9ae2e | 468 | |
de1c301e LP |
469 | return 1; |
470 | } | |
471 | ||
472 | static void skip_address_key(const char **p) { | |
473 | assert(p); | |
474 | assert(*p); | |
475 | ||
89ffcd2a LP |
476 | *p += strcspn(*p, ","); |
477 | ||
478 | if (**p == ',') | |
479 | (*p) ++; | |
de1c301e LP |
480 | } |
481 | ||
2fd9ae2e LP |
482 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
483 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
484 | size_t l; | |
de1c301e LP |
485 | int r; |
486 | ||
487 | assert(b); | |
2fd9ae2e LP |
488 | assert(p); |
489 | assert(*p); | |
490 | assert(guid); | |
de1c301e | 491 | |
2fd9ae2e LP |
492 | while (**p != 0 && **p != ';') { |
493 | r = parse_address_key(p, "guid", guid); | |
494 | if (r < 0) | |
495 | return r; | |
496 | else if (r > 0) | |
497 | continue; | |
de1c301e | 498 | |
2fd9ae2e LP |
499 | r = parse_address_key(p, "path", &path); |
500 | if (r < 0) | |
501 | return r; | |
502 | else if (r > 0) | |
503 | continue; | |
de1c301e | 504 | |
2fd9ae2e LP |
505 | r = parse_address_key(p, "abstract", &abstract); |
506 | if (r < 0) | |
507 | return r; | |
508 | else if (r > 0) | |
509 | continue; | |
de1c301e | 510 | |
2fd9ae2e LP |
511 | skip_address_key(p); |
512 | } | |
de1c301e | 513 | |
2fd9ae2e LP |
514 | if (!path && !abstract) |
515 | return -EINVAL; | |
de1c301e | 516 | |
2fd9ae2e LP |
517 | if (path && abstract) |
518 | return -EINVAL; | |
519 | ||
520 | if (path) { | |
521 | l = strlen(path); | |
522 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
523 | return -E2BIG; | |
de1c301e | 524 | |
2fd9ae2e LP |
525 | b->sockaddr.un.sun_family = AF_UNIX; |
526 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
527 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
528 | } else if (abstract) { | |
529 | l = strlen(abstract); | |
530 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
531 | return -E2BIG; | |
532 | ||
533 | b->sockaddr.un.sun_family = AF_UNIX; | |
534 | b->sockaddr.un.sun_path[0] = 0; | |
535 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
536 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
537 | } | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
543 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 544 | int r; |
b92bea5d ZJS |
545 | struct addrinfo *result, hints = { |
546 | .ai_socktype = SOCK_STREAM, | |
547 | .ai_flags = AI_ADDRCONFIG, | |
548 | }; | |
2fd9ae2e LP |
549 | |
550 | assert(b); | |
551 | assert(p); | |
552 | assert(*p); | |
553 | assert(guid); | |
554 | ||
555 | while (**p != 0 && **p != ';') { | |
556 | r = parse_address_key(p, "guid", guid); | |
557 | if (r < 0) | |
558 | return r; | |
559 | else if (r > 0) | |
560 | continue; | |
561 | ||
562 | r = parse_address_key(p, "host", &host); | |
563 | if (r < 0) | |
564 | return r; | |
565 | else if (r > 0) | |
566 | continue; | |
567 | ||
568 | r = parse_address_key(p, "port", &port); | |
569 | if (r < 0) | |
570 | return r; | |
571 | else if (r > 0) | |
572 | continue; | |
573 | ||
574 | r = parse_address_key(p, "family", &family); | |
575 | if (r < 0) | |
576 | return r; | |
577 | else if (r > 0) | |
578 | continue; | |
579 | ||
580 | skip_address_key(p); | |
581 | } | |
582 | ||
583 | if (!host || !port) | |
584 | return -EINVAL; | |
585 | ||
2fd9ae2e LP |
586 | if (family) { |
587 | if (streq(family, "ipv4")) | |
588 | hints.ai_family = AF_INET; | |
589 | else if (streq(family, "ipv6")) | |
590 | hints.ai_family = AF_INET6; | |
591 | else | |
592 | return -EINVAL; | |
593 | } | |
594 | ||
595 | r = getaddrinfo(host, port, &hints, &result); | |
596 | if (r == EAI_SYSTEM) | |
597 | return -errno; | |
598 | else if (r != 0) | |
599 | return -EADDRNOTAVAIL; | |
600 | ||
601 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
602 | b->sockaddr_size = result->ai_addrlen; | |
603 | ||
604 | freeaddrinfo(result); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
609 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
610 | char *path = NULL; | |
611 | unsigned n_argv = 0, j; | |
612 | char **argv = NULL; | |
613 | int r; | |
614 | ||
615 | assert(b); | |
616 | assert(p); | |
617 | assert(*p); | |
618 | assert(guid); | |
619 | ||
620 | while (**p != 0 && **p != ';') { | |
621 | r = parse_address_key(p, "guid", guid); | |
622 | if (r < 0) | |
623 | goto fail; | |
624 | else if (r > 0) | |
625 | continue; | |
626 | ||
627 | r = parse_address_key(p, "path", &path); | |
628 | if (r < 0) | |
629 | goto fail; | |
630 | else if (r > 0) | |
631 | continue; | |
632 | ||
633 | if (startswith(*p, "argv")) { | |
634 | unsigned ul; | |
635 | ||
636 | errno = 0; | |
637 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 638 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
639 | r = -EINVAL; |
640 | goto fail; | |
641 | } | |
642 | ||
643 | (*p) ++; | |
644 | ||
645 | if (ul >= n_argv) { | |
646 | char **x; | |
647 | ||
648 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
649 | if (!x) { | |
650 | r = -ENOMEM; | |
651 | goto fail; | |
652 | } | |
653 | ||
654 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
655 | ||
656 | argv = x; | |
657 | n_argv = ul + 1; | |
658 | } | |
659 | ||
660 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 661 | if (r < 0) |
2fd9ae2e | 662 | goto fail; |
de1c301e | 663 | |
2fd9ae2e | 664 | continue; |
de1c301e LP |
665 | } |
666 | ||
2fd9ae2e LP |
667 | skip_address_key(p); |
668 | } | |
de1c301e | 669 | |
5a0f6033 LP |
670 | if (!path) { |
671 | r = -EINVAL; | |
2fd9ae2e | 672 | goto fail; |
5a0f6033 | 673 | } |
de1c301e | 674 | |
2fd9ae2e LP |
675 | /* Make sure there are no holes in the array, with the |
676 | * exception of argv[0] */ | |
677 | for (j = 1; j < n_argv; j++) | |
678 | if (!argv[j]) { | |
679 | r = -EINVAL; | |
680 | goto fail; | |
681 | } | |
682 | ||
683 | if (argv && argv[0] == NULL) { | |
684 | argv[0] = strdup(path); | |
685 | if (!argv[0]) { | |
686 | r = -ENOMEM; | |
687 | goto fail; | |
688 | } | |
689 | } | |
de1c301e | 690 | |
2fd9ae2e LP |
691 | b->exec_path = path; |
692 | b->exec_argv = argv; | |
693 | return 0; | |
de1c301e | 694 | |
2fd9ae2e LP |
695 | fail: |
696 | for (j = 0; j < n_argv; j++) | |
697 | free(argv[j]); | |
698 | ||
699 | free(argv); | |
700 | free(path); | |
701 | return r; | |
702 | } | |
703 | ||
6629161f LP |
704 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
705 | _cleanup_free_ char *path = NULL; | |
706 | int r; | |
707 | ||
708 | assert(b); | |
709 | assert(p); | |
710 | assert(*p); | |
711 | assert(guid); | |
712 | ||
713 | while (**p != 0 && **p != ';') { | |
714 | r = parse_address_key(p, "guid", guid); | |
715 | if (r < 0) | |
716 | return r; | |
717 | else if (r > 0) | |
718 | continue; | |
719 | ||
720 | r = parse_address_key(p, "path", &path); | |
721 | if (r < 0) | |
722 | return r; | |
723 | else if (r > 0) | |
724 | continue; | |
725 | ||
726 | skip_address_key(p); | |
727 | } | |
728 | ||
729 | if (!path) | |
730 | return -EINVAL; | |
731 | ||
732 | free(b->kernel); | |
733 | b->kernel = path; | |
734 | path = NULL; | |
735 | ||
736 | return 0; | |
737 | } | |
738 | ||
a7893c6b LP |
739 | static int parse_container_address(sd_bus *b, const char **p, char **guid) { |
740 | _cleanup_free_ char *machine = NULL; | |
741 | int r; | |
742 | ||
743 | assert(b); | |
744 | assert(p); | |
745 | assert(*p); | |
746 | assert(guid); | |
747 | ||
748 | while (**p != 0 && **p != ';') { | |
749 | r = parse_address_key(p, "guid", guid); | |
750 | if (r < 0) | |
751 | return r; | |
752 | else if (r > 0) | |
753 | continue; | |
754 | ||
755 | r = parse_address_key(p, "machine", &machine); | |
756 | if (r < 0) | |
757 | return r; | |
758 | else if (r > 0) | |
759 | continue; | |
760 | ||
761 | skip_address_key(p); | |
762 | } | |
763 | ||
764 | if (!machine) | |
765 | return -EINVAL; | |
766 | ||
b6741478 LP |
767 | if (!filename_is_safe(machine)) |
768 | return -EINVAL; | |
769 | ||
a7893c6b LP |
770 | free(b->machine); |
771 | b->machine = machine; | |
772 | machine = NULL; | |
773 | ||
774 | b->sockaddr.un.sun_family = AF_UNIX; | |
775 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
776 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1; | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
2fd9ae2e LP |
781 | static void bus_reset_parsed_address(sd_bus *b) { |
782 | assert(b); | |
783 | ||
784 | zero(b->sockaddr); | |
785 | b->sockaddr_size = 0; | |
786 | strv_free(b->exec_argv); | |
787 | free(b->exec_path); | |
788 | b->exec_path = NULL; | |
789 | b->exec_argv = NULL; | |
98178d39 | 790 | b->server_id = SD_ID128_NULL; |
6629161f LP |
791 | free(b->kernel); |
792 | b->kernel = NULL; | |
a7893c6b LP |
793 | free(b->machine); |
794 | b->machine = NULL; | |
2fd9ae2e LP |
795 | } |
796 | ||
797 | static int bus_parse_next_address(sd_bus *b) { | |
798 | _cleanup_free_ char *guid = NULL; | |
799 | const char *a; | |
800 | int r; | |
801 | ||
802 | assert(b); | |
803 | ||
804 | if (!b->address) | |
805 | return 0; | |
806 | if (b->address[b->address_index] == 0) | |
807 | return 0; | |
808 | ||
809 | bus_reset_parsed_address(b); | |
810 | ||
811 | a = b->address + b->address_index; | |
de1c301e | 812 | |
2fd9ae2e | 813 | while (*a != 0) { |
de1c301e | 814 | |
2fd9ae2e LP |
815 | if (*a == ';') { |
816 | a++; | |
817 | continue; | |
de1c301e LP |
818 | } |
819 | ||
2fd9ae2e LP |
820 | if (startswith(a, "unix:")) { |
821 | a += 5; | |
de1c301e | 822 | |
2fd9ae2e | 823 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
824 | if (r < 0) |
825 | return r; | |
2fd9ae2e | 826 | break; |
de1c301e | 827 | |
2fd9ae2e | 828 | } else if (startswith(a, "tcp:")) { |
de1c301e | 829 | |
2fd9ae2e LP |
830 | a += 4; |
831 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
832 | if (r < 0) |
833 | return r; | |
de1c301e | 834 | |
2fd9ae2e LP |
835 | break; |
836 | ||
837 | } else if (startswith(a, "unixexec:")) { | |
838 | ||
839 | a += 9; | |
840 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
841 | if (r < 0) |
842 | return r; | |
de1c301e | 843 | |
2fd9ae2e | 844 | break; |
de1c301e | 845 | |
6629161f LP |
846 | } else if (startswith(a, "kernel:")) { |
847 | ||
848 | a += 7; | |
849 | r = parse_kernel_address(b, &a, &guid); | |
850 | if (r < 0) | |
851 | return r; | |
852 | ||
a7893c6b LP |
853 | break; |
854 | } else if (startswith(a, "x-container:")) { | |
855 | ||
856 | a += 12; | |
857 | r = parse_container_address(b, &a, &guid); | |
858 | if (r < 0) | |
859 | return r; | |
860 | ||
6629161f | 861 | break; |
de1c301e LP |
862 | } |
863 | ||
2fd9ae2e LP |
864 | a = strchr(a, ';'); |
865 | if (!a) | |
866 | return 0; | |
de1c301e LP |
867 | } |
868 | ||
869 | if (guid) { | |
98178d39 | 870 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
871 | if (r < 0) |
872 | return r; | |
873 | } | |
874 | ||
2fd9ae2e | 875 | b->address_index = a - b->address; |
de1c301e LP |
876 | return 1; |
877 | } | |
878 | ||
a7e3212d | 879 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
880 | int r; |
881 | ||
882 | assert(b); | |
883 | ||
884 | for (;;) { | |
e82c9509 | 885 | sd_bus_close(b); |
2fd9ae2e | 886 | |
a7893c6b | 887 | if (b->exec_path) { |
a7e3212d | 888 | |
a7893c6b | 889 | r = bus_socket_exec(b); |
2fd9ae2e LP |
890 | if (r >= 0) |
891 | return r; | |
892 | ||
893 | b->last_connect_error = -r; | |
a7893c6b | 894 | } else if (b->kernel) { |
2fd9ae2e | 895 | |
a7893c6b LP |
896 | r = bus_kernel_connect(b); |
897 | if (r >= 0) | |
898 | return r; | |
2fd9ae2e | 899 | |
a7893c6b LP |
900 | b->last_connect_error = -r; |
901 | ||
902 | } else if (b->machine) { | |
903 | ||
904 | r = bus_container_connect(b); | |
2fd9ae2e LP |
905 | if (r >= 0) |
906 | return r; | |
907 | ||
6629161f | 908 | b->last_connect_error = -r; |
6629161f | 909 | |
a7893c6b LP |
910 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { |
911 | ||
912 | r = bus_socket_connect(b); | |
6629161f LP |
913 | if (r >= 0) |
914 | return r; | |
915 | ||
2fd9ae2e LP |
916 | b->last_connect_error = -r; |
917 | } | |
918 | ||
919 | r = bus_parse_next_address(b); | |
920 | if (r < 0) | |
921 | return r; | |
922 | if (r == 0) | |
923 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
924 | } |
925 | } | |
926 | ||
a7e3212d LP |
927 | int bus_next_address(sd_bus *b) { |
928 | assert(b); | |
929 | ||
930 | bus_reset_parsed_address(b); | |
931 | return bus_start_address(b); | |
932 | } | |
933 | ||
021a1e78 | 934 | static int bus_start_fd(sd_bus *b) { |
6629161f | 935 | struct stat st; |
021a1e78 LP |
936 | int r; |
937 | ||
938 | assert(b); | |
e82c9509 LP |
939 | assert(b->input_fd >= 0); |
940 | assert(b->output_fd >= 0); | |
021a1e78 | 941 | |
e82c9509 | 942 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
943 | if (r < 0) |
944 | return r; | |
945 | ||
e82c9509 | 946 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
947 | if (r < 0) |
948 | return r; | |
949 | ||
e82c9509 LP |
950 | if (b->input_fd != b->output_fd) { |
951 | r = fd_nonblock(b->output_fd, true); | |
952 | if (r < 0) | |
953 | return r; | |
954 | ||
955 | r = fd_cloexec(b->output_fd, true); | |
956 | if (r < 0) | |
957 | return r; | |
958 | } | |
959 | ||
6629161f LP |
960 | if (fstat(b->input_fd, &st) < 0) |
961 | return -errno; | |
962 | ||
963 | if (S_ISCHR(b->input_fd)) | |
964 | return bus_kernel_take_fd(b); | |
965 | else | |
966 | return bus_socket_take_fd(b); | |
021a1e78 LP |
967 | } |
968 | ||
d9f644e2 | 969 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
970 | int r; |
971 | ||
d6888822 LP |
972 | assert_return(bus, -EINVAL); |
973 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
974 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
975 | |
976 | bus->state = BUS_OPENING; | |
977 | ||
2181a7f5 LP |
978 | if (bus->is_server && bus->bus_client) |
979 | return -EINVAL; | |
980 | ||
e82c9509 | 981 | if (bus->input_fd >= 0) |
021a1e78 | 982 | r = bus_start_fd(bus); |
a7893c6b | 983 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 984 | r = bus_start_address(bus); |
021a1e78 LP |
985 | else |
986 | return -EINVAL; | |
987 | ||
988 | if (r < 0) | |
989 | return r; | |
990 | ||
991 | return bus_send_hello(bus); | |
992 | } | |
993 | ||
d9f644e2 | 994 | _public_ int sd_bus_open_system(sd_bus **ret) { |
de1c301e LP |
995 | const char *e; |
996 | sd_bus *b; | |
997 | int r; | |
998 | ||
d6888822 | 999 | assert_return(ret, -EINVAL); |
de1c301e | 1000 | |
021a1e78 LP |
1001 | r = sd_bus_new(&b); |
1002 | if (r < 0) | |
1003 | return r; | |
1004 | ||
6c03089c | 1005 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
e3dd987c | 1006 | if (e) |
021a1e78 | 1007 | r = sd_bus_set_address(b, e); |
e3dd987c | 1008 | else |
626851be | 1009 | #ifdef ENABLE_KDBUS |
e3dd987c | 1010 | r = sd_bus_set_address(b, "kernel:path=/dev/kdbus/0-system/bus;unix:path=/run/dbus/system_bus_socket"); |
626851be LP |
1011 | #else |
1012 | r = sd_bus_set_address(b, "unix:path=/run/dbus/system_bus_socket"); | |
1013 | #endif | |
e3dd987c LP |
1014 | |
1015 | if (r < 0) | |
1016 | goto fail; | |
de1c301e | 1017 | |
94bbf1ba | 1018 | b->bus_client = true; |
021a1e78 | 1019 | |
adacb957 LP |
1020 | /* Let's do per-method access control on the system bus. We |
1021 | * need the caller's UID and capability set for that. */ | |
1022 | b->trusted = false; | |
1023 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1024 | ||
021a1e78 LP |
1025 | r = sd_bus_start(b); |
1026 | if (r < 0) | |
1027 | goto fail; | |
de1c301e LP |
1028 | |
1029 | *ret = b; | |
1030 | return 0; | |
021a1e78 LP |
1031 | |
1032 | fail: | |
1033 | bus_free(b); | |
1034 | return r; | |
de1c301e LP |
1035 | } |
1036 | ||
d9f644e2 | 1037 | _public_ int sd_bus_open_user(sd_bus **ret) { |
de1c301e LP |
1038 | const char *e; |
1039 | sd_bus *b; | |
de1c301e LP |
1040 | int r; |
1041 | ||
d6888822 | 1042 | assert_return(ret, -EINVAL); |
de1c301e | 1043 | |
021a1e78 LP |
1044 | r = sd_bus_new(&b); |
1045 | if (r < 0) | |
1046 | return r; | |
1047 | ||
6c03089c | 1048 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1049 | if (e) { |
021a1e78 | 1050 | r = sd_bus_set_address(b, e); |
de1c301e | 1051 | if (r < 0) |
021a1e78 | 1052 | goto fail; |
89ffcd2a | 1053 | } else { |
6c03089c | 1054 | e = secure_getenv("XDG_RUNTIME_DIR"); |
e3dd987c LP |
1055 | if (e) { |
1056 | _cleanup_free_ char *ee = NULL; | |
1057 | ||
1058 | ee = bus_address_escape(e); | |
1059 | if (!ee) { | |
626851be | 1060 | r = -ENOMEM; |
e3dd987c LP |
1061 | goto fail; |
1062 | } | |
1063 | ||
626851be | 1064 | #ifdef ENABLE_KDBUS |
e3dd987c | 1065 | asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus;unix:path=%s/bus", (unsigned long) getuid(), ee); |
626851be LP |
1066 | #else |
1067 | b->address = strjoin("unix:path=", ee, "/bus", NULL); | |
1068 | #endif | |
1069 | } else { | |
1070 | #ifdef ENABLE_KDBUS | |
e3dd987c | 1071 | asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus", (unsigned long) getuid()); |
626851be LP |
1072 | #else |
1073 | return -ECONNREFUSED; | |
1074 | #endif | |
1075 | } | |
de1c301e | 1076 | |
e3dd987c LP |
1077 | if (!b->address) { |
1078 | r = -ENOMEM; | |
021a1e78 LP |
1079 | goto fail; |
1080 | } | |
de1c301e LP |
1081 | } |
1082 | ||
94bbf1ba | 1083 | b->bus_client = true; |
de1c301e | 1084 | |
adacb957 LP |
1085 | /* We don't do any per-method access control on the user |
1086 | * bus. */ | |
1087 | b->trusted = true; | |
1088 | ||
021a1e78 | 1089 | r = sd_bus_start(b); |
2571ead1 LP |
1090 | if (r < 0) |
1091 | goto fail; | |
de1c301e LP |
1092 | |
1093 | *ret = b; | |
1094 | return 0; | |
2571ead1 LP |
1095 | |
1096 | fail: | |
021a1e78 | 1097 | bus_free(b); |
2571ead1 | 1098 | return r; |
de1c301e LP |
1099 | } |
1100 | ||
d9f644e2 | 1101 | _public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
0f8bd8de LP |
1102 | _cleanup_free_ char *e = NULL; |
1103 | char *p = NULL; | |
1104 | sd_bus *bus; | |
1105 | int r; | |
1106 | ||
1107 | assert_return(host, -EINVAL); | |
1108 | assert_return(ret, -EINVAL); | |
1109 | ||
1110 | e = bus_address_escape(host); | |
1111 | if (!e) | |
1112 | return -ENOMEM; | |
1113 | ||
1114 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1115 | if (!p) | |
1116 | return -ENOMEM; | |
a7893c6b 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_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) { |
a7893c6b LP |
1138 | _cleanup_free_ char *e = NULL; |
1139 | sd_bus *bus; | |
1140 | char *p; | |
1141 | int r; | |
1142 | ||
1143 | assert_return(machine, -EINVAL); | |
1144 | assert_return(ret, -EINVAL); | |
9e554864 | 1145 | assert_return(filename_is_safe(machine), -EINVAL); |
a7893c6b LP |
1146 | |
1147 | e = bus_address_escape(machine); | |
1148 | if (!e) | |
1149 | return -ENOMEM; | |
1150 | ||
9e554864 LP |
1151 | #ifdef ENABLE_KDBUS |
1152 | p = strjoin("kernel:path=/dev/kdbus/ns/machine-", e, "/0-system/bus;x-container:machine=", e, NULL); | |
1153 | #else | |
a7893c6b | 1154 | p = strjoin("x-container:machine=", e, NULL); |
9e554864 | 1155 | #endif |
a7893c6b LP |
1156 | if (!p) |
1157 | return -ENOMEM; | |
0f8bd8de LP |
1158 | |
1159 | r = sd_bus_new(&bus); | |
1160 | if (r < 0) { | |
1161 | free(p); | |
1162 | return r; | |
1163 | } | |
1164 | ||
1165 | bus->address = p; | |
1166 | bus->bus_client = true; | |
1167 | ||
1168 | r = sd_bus_start(bus); | |
1169 | if (r < 0) { | |
1170 | bus_free(bus); | |
1171 | return r; | |
1172 | } | |
1173 | ||
1174 | *ret = bus; | |
1175 | return 0; | |
1176 | } | |
1177 | ||
d9f644e2 | 1178 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1179 | |
de1c301e LP |
1180 | if (!bus) |
1181 | return; | |
d5a2b9a6 LP |
1182 | if (bus->state == BUS_CLOSED) |
1183 | return; | |
1184 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1185 | return; |
1186 | ||
1187 | bus->state = BUS_CLOSED; | |
e82c9509 | 1188 | |
40ca29a1 LP |
1189 | sd_bus_detach_event(bus); |
1190 | ||
0e586eae LP |
1191 | /* Drop all queued messages so that they drop references to |
1192 | * the bus object and the bus may be freed */ | |
1193 | bus_reset_queues(bus); | |
1194 | ||
f54514f3 LP |
1195 | if (!bus->is_kernel) |
1196 | bus_close_fds(bus); | |
1197 | ||
1198 | /* We'll leave the fd open in case this is a kernel bus, since | |
1199 | * there might still be memblocks around that reference this | |
1d0e3c98 DM |
1200 | * bus, and they might need to invoke the * KDBUS_CMD_FREE |
1201 | * ioctl on the fd when they are freed. */ | |
de1c301e LP |
1202 | } |
1203 | ||
718db961 LP |
1204 | static void bus_enter_closing(sd_bus *bus) { |
1205 | assert(bus); | |
1206 | ||
1207 | if (bus->state != BUS_OPENING && | |
1208 | bus->state != BUS_AUTHENTICATING && | |
1209 | bus->state != BUS_HELLO && | |
1210 | bus->state != BUS_RUNNING) | |
1211 | return; | |
1212 | ||
1213 | bus->state = BUS_CLOSING; | |
1214 | } | |
1215 | ||
d9f644e2 | 1216 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1217 | assert_return(bus, NULL); |
de1c301e | 1218 | |
e4ee6e5c | 1219 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1220 | |
de1c301e LP |
1221 | return bus; |
1222 | } | |
1223 | ||
d9f644e2 | 1224 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
5b1bc83f LP |
1225 | |
1226 | if (!bus) | |
1227 | return NULL; | |
de1c301e | 1228 | |
e4ee6e5c | 1229 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1230 | bus_free(bus); |
1231 | ||
1232 | return NULL; | |
1233 | } | |
1234 | ||
d9f644e2 | 1235 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1236 | |
1237 | assert_return(bus, -EINVAL); | |
1238 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1239 | |
f54514f3 | 1240 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1241 | } |
1242 | ||
d9f644e2 | 1243 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1244 | int r; |
1245 | ||
d6888822 LP |
1246 | assert_return(bus, -EINVAL); |
1247 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1248 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1249 | |
d728d708 | 1250 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1251 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1252 | return 0; |
1253 | ||
20902f3e | 1254 | r = bus_ensure_running(bus); |
d728d708 LP |
1255 | if (r < 0) |
1256 | return r; | |
de1c301e | 1257 | |
d728d708 LP |
1258 | return bus->can_fds; |
1259 | } | |
1260 | ||
1261 | return bus_type_is_valid(type); | |
de1c301e LP |
1262 | } |
1263 | ||
d9f644e2 | 1264 | _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1265 | int r; |
de1c301e | 1266 | |
d6888822 LP |
1267 | assert_return(bus, -EINVAL); |
1268 | assert_return(server_id, -EINVAL); | |
1269 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1270 | |
20902f3e | 1271 | r = bus_ensure_running(bus); |
d728d708 LP |
1272 | if (r < 0) |
1273 | return r; | |
de1c301e | 1274 | |
98178d39 | 1275 | *server_id = bus->server_id; |
d728d708 | 1276 | return 0; |
de1c301e LP |
1277 | } |
1278 | ||
7adc46fc LP |
1279 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { |
1280 | assert(b); | |
de1c301e LP |
1281 | assert(m); |
1282 | ||
89ffcd2a LP |
1283 | if (m->header->version > b->message_version) |
1284 | return -EPERM; | |
1285 | ||
aea93deb LP |
1286 | if (m->sealed) { |
1287 | /* If we copy the same message to multiple | |
1288 | * destinations, avoid using the same serial | |
1289 | * numbers. */ | |
1290 | b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m)); | |
de1c301e | 1291 | return 0; |
aea93deb | 1292 | } |
de1c301e | 1293 | |
9a17484d | 1294 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1295 | } |
1296 | ||
7adc46fc LP |
1297 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1298 | assert(b); | |
1299 | assert(m); | |
1300 | ||
1301 | if (m->header->version > b->message_version) | |
1302 | return -EPERM; | |
1303 | ||
1304 | /* The bus specification says the serial number cannot be 0, | |
1305 | * hence let's fill something in for synthetic messages. Since | |
1306 | * synthetic messages might have a fake sender and we don't | |
1307 | * want to interfere with the real sender's serial numbers we | |
1308 | * pick a fixed, artifical one. We use (uint32_t) -1 rather | |
1309 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, | |
1310 | * even though kdbus can do 64bit. */ | |
1311 | ||
1312 | return bus_message_seal(m, 0xFFFFFFFFULL); | |
1313 | } | |
1314 | ||
718db961 | 1315 | static int bus_write_message(sd_bus *bus, sd_bus_message *message, size_t *idx) { |
718db961 LP |
1316 | assert(bus); |
1317 | assert(message); | |
1318 | ||
1319 | if (bus->is_kernel) | |
a43b9ca3 | 1320 | return bus_kernel_write_message(bus, message); |
718db961 | 1321 | else |
a43b9ca3 | 1322 | return bus_socket_write_message(bus, message, idx); |
718db961 LP |
1323 | } |
1324 | ||
de1c301e | 1325 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1326 | int r, ret = 0; |
de1c301e LP |
1327 | |
1328 | assert(bus); | |
89ffcd2a | 1329 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1330 | |
de1c301e LP |
1331 | while (bus->wqueue_size > 0) { |
1332 | ||
718db961 LP |
1333 | r = bus_write_message(bus, bus->wqueue[0], &bus->windex); |
1334 | if (r < 0) | |
de1c301e | 1335 | return r; |
718db961 | 1336 | else if (r == 0) |
e3017af9 LP |
1337 | /* Didn't do anything this time */ |
1338 | return ret; | |
6629161f | 1339 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1340 | /* Fully written. Let's drop the entry from |
1341 | * the queue. | |
1342 | * | |
1343 | * This isn't particularly optimized, but | |
1344 | * well, this is supposed to be our worst-case | |
1345 | * buffer only, and the socket buffer is | |
1346 | * supposed to be our primary buffer, and if | |
1347 | * it got full, then all bets are off | |
1348 | * anyway. */ | |
1349 | ||
1350 | sd_bus_message_unref(bus->wqueue[0]); | |
1351 | bus->wqueue_size --; | |
1352 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1353 | bus->windex = 0; | |
1354 | ||
e3017af9 | 1355 | ret = 1; |
de1c301e LP |
1356 | } |
1357 | } | |
1358 | ||
e3017af9 | 1359 | return ret; |
de1c301e LP |
1360 | } |
1361 | ||
7d22c717 LP |
1362 | static int bus_read_message(sd_bus *bus) { |
1363 | assert(bus); | |
1364 | ||
1365 | if (bus->is_kernel) | |
1366 | return bus_kernel_read_message(bus); | |
1367 | else | |
1368 | return bus_socket_read_message(bus); | |
1369 | } | |
1370 | ||
7adc46fc | 1371 | int bus_rqueue_make_room(sd_bus *bus) { |
7d22c717 LP |
1372 | sd_bus_message **q; |
1373 | unsigned x; | |
1374 | ||
7adc46fc | 1375 | x = bus->rqueue_size + 1; |
7d22c717 LP |
1376 | |
1377 | if (bus->rqueue_allocated >= x) | |
1378 | return 0; | |
1379 | ||
1380 | if (x > BUS_RQUEUE_MAX) | |
1381 | return -ENOBUFS; | |
1382 | ||
1383 | q = realloc(bus->rqueue, x * sizeof(sd_bus_message*)); | |
1384 | if (!q) | |
1385 | return -ENOMEM; | |
1386 | ||
1387 | bus->rqueue = q; | |
1388 | bus->rqueue_allocated = x; | |
1389 | ||
1390 | return 0; | |
1391 | } | |
1392 | ||
de1c301e | 1393 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { |
e3017af9 | 1394 | int r, ret = 0; |
de1c301e LP |
1395 | |
1396 | assert(bus); | |
1397 | assert(m); | |
89ffcd2a | 1398 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1399 | |
7d22c717 LP |
1400 | for (;;) { |
1401 | if (bus->rqueue_size > 0) { | |
1402 | /* Dispatch a queued message */ | |
de1c301e | 1403 | |
7d22c717 LP |
1404 | *m = bus->rqueue[0]; |
1405 | bus->rqueue_size --; | |
1406 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1407 | return 1; | |
1408 | } | |
de1c301e | 1409 | |
7d22c717 LP |
1410 | /* Try to read a new message */ |
1411 | r = bus_read_message(bus); | |
718db961 | 1412 | if (r < 0) |
e3017af9 | 1413 | return r; |
e3017af9 LP |
1414 | if (r == 0) |
1415 | return ret; | |
de1c301e | 1416 | |
2e8d788c | 1417 | ret = 1; |
7d22c717 | 1418 | } |
de1c301e LP |
1419 | } |
1420 | ||
d9f644e2 | 1421 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { |
de1c301e LP |
1422 | int r; |
1423 | ||
d6888822 LP |
1424 | assert_return(bus, -EINVAL); |
1425 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1426 | assert_return(m, -EINVAL); | |
1427 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1428 | |
1429 | if (m->n_fds > 0) { | |
1430 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1431 | if (r < 0) | |
1432 | return r; | |
1433 | if (r == 0) | |
1434 | return -ENOTSUP; | |
1435 | } | |
de1c301e | 1436 | |
29f6aadd LP |
1437 | /* If the serial number isn't kept, then we know that no reply |
1438 | * is expected */ | |
1439 | if (!serial && !m->sealed) | |
0461f8cd | 1440 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1441 | |
de1c301e LP |
1442 | r = bus_seal_message(bus, m); |
1443 | if (r < 0) | |
1444 | return r; | |
1445 | ||
5407f2de LP |
1446 | /* If this is a reply and no reply was requested, then let's |
1447 | * suppress this, if we can */ | |
1448 | if (m->dont_send && !serial) | |
7a37d625 | 1449 | return 1; |
5407f2de | 1450 | |
89ffcd2a | 1451 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1452 | size_t idx = 0; |
1453 | ||
718db961 | 1454 | r = bus_write_message(bus, m, &idx); |
32f46480 LP |
1455 | if (r < 0) { |
1456 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1457 | bus_enter_closing(bus); | |
1458 | ||
de1c301e | 1459 | return r; |
32f46480 | 1460 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1461 | /* Wasn't fully written. So let's remember how |
1462 | * much was written. Note that the first entry | |
1463 | * of the wqueue array is always allocated so | |
1464 | * that we always can remember how much was | |
1465 | * written. */ | |
1466 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1467 | bus->wqueue_size = 1; | |
1468 | bus->windex = idx; | |
1469 | } | |
1470 | } else { | |
1471 | sd_bus_message **q; | |
1472 | ||
1473 | /* Just append it to the queue. */ | |
1474 | ||
25220239 | 1475 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1476 | return -ENOBUFS; |
1477 | ||
1478 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1479 | if (!q) | |
1480 | return -ENOMEM; | |
1481 | ||
1482 | bus->wqueue = q; | |
1483 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1484 | } | |
1485 | ||
1486 | if (serial) | |
1487 | *serial = BUS_MESSAGE_SERIAL(m); | |
1488 | ||
7a37d625 | 1489 | return 1; |
de1c301e LP |
1490 | } |
1491 | ||
911121a7 LP |
1492 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *serial) { |
1493 | int r; | |
1494 | ||
1495 | assert_return(bus, -EINVAL); | |
1496 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1497 | assert_return(m, -EINVAL); | |
1498 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1499 | ||
1500 | if (!streq_ptr(m->destination, destination)) { | |
1501 | ||
1502 | if (!destination) | |
1503 | return -EEXIST; | |
1504 | ||
1505 | r = sd_bus_message_set_destination(m, destination); | |
1506 | if (r < 0) | |
1507 | return r; | |
1508 | } | |
1509 | ||
1510 | return sd_bus_send(bus, m, serial); | |
1511 | } | |
1512 | ||
de1c301e LP |
1513 | static usec_t calc_elapse(uint64_t usec) { |
1514 | if (usec == (uint64_t) -1) | |
1515 | return 0; | |
1516 | ||
1517 | if (usec == 0) | |
e3017af9 | 1518 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1519 | |
1520 | return now(CLOCK_MONOTONIC) + usec; | |
1521 | } | |
1522 | ||
e3017af9 LP |
1523 | static int timeout_compare(const void *a, const void *b) { |
1524 | const struct reply_callback *x = a, *y = b; | |
1525 | ||
1526 | if (x->timeout != 0 && y->timeout == 0) | |
1527 | return -1; | |
1528 | ||
1529 | if (x->timeout == 0 && y->timeout != 0) | |
1530 | return 1; | |
1531 | ||
1532 | if (x->timeout < y->timeout) | |
1533 | return -1; | |
1534 | ||
1535 | if (x->timeout > y->timeout) | |
1536 | return 1; | |
1537 | ||
1538 | return 0; | |
1539 | } | |
1540 | ||
c49b30a2 | 1541 | _public_ int sd_bus_call_async( |
de1c301e LP |
1542 | sd_bus *bus, |
1543 | sd_bus_message *m, | |
52f3ba91 | 1544 | sd_bus_message_handler_t callback, |
de1c301e LP |
1545 | void *userdata, |
1546 | uint64_t usec, | |
1547 | uint64_t *serial) { | |
1548 | ||
1549 | struct reply_callback *c; | |
1550 | int r; | |
1551 | ||
d6888822 LP |
1552 | assert_return(bus, -EINVAL); |
1553 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1554 | assert_return(m, -EINVAL); | |
40ca29a1 | 1555 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1556 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1557 | assert_return(callback, -EINVAL); |
1558 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1559 | |
1560 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1561 | if (r < 0) | |
1562 | return r; | |
de1c301e | 1563 | |
e3017af9 LP |
1564 | if (usec != (uint64_t) -1) { |
1565 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1566 | if (r < 0) | |
1567 | return r; | |
1568 | } | |
1569 | ||
de1c301e LP |
1570 | r = bus_seal_message(bus, m); |
1571 | if (r < 0) | |
1572 | return r; | |
1573 | ||
eba8617e | 1574 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1575 | if (!c) |
1576 | return -ENOMEM; | |
1577 | ||
1578 | c->callback = callback; | |
1579 | c->userdata = userdata; | |
1580 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1581 | c->timeout = calc_elapse(usec); | |
1582 | ||
1583 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1584 | if (r < 0) { | |
1585 | free(c); | |
1586 | return r; | |
1587 | } | |
1588 | ||
e3017af9 LP |
1589 | if (c->timeout != 0) { |
1590 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1591 | if (r < 0) { | |
1592 | c->timeout = 0; | |
c49b30a2 | 1593 | sd_bus_call_async_cancel(bus, c->serial); |
e3017af9 LP |
1594 | return r; |
1595 | } | |
1596 | } | |
1597 | ||
de1c301e LP |
1598 | r = sd_bus_send(bus, m, serial); |
1599 | if (r < 0) { | |
c49b30a2 | 1600 | sd_bus_call_async_cancel(bus, c->serial); |
de1c301e LP |
1601 | return r; |
1602 | } | |
1603 | ||
1604 | return r; | |
1605 | } | |
1606 | ||
c49b30a2 | 1607 | _public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t serial) { |
e3017af9 | 1608 | struct reply_callback *c; |
de1c301e | 1609 | |
d6888822 LP |
1610 | assert_return(bus, -EINVAL); |
1611 | assert_return(serial != 0, -EINVAL); | |
1612 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1613 | |
1614 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1615 | if (!c) | |
1616 | return 0; | |
1617 | ||
e3017af9 LP |
1618 | if (c->timeout != 0) |
1619 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1620 | ||
de1c301e LP |
1621 | free(c); |
1622 | return 1; | |
1623 | } | |
1624 | ||
20902f3e | 1625 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1626 | int r; |
1627 | ||
1628 | assert(bus); | |
1629 | ||
718db961 | 1630 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1631 | return -ENOTCONN; |
d728d708 LP |
1632 | if (bus->state == BUS_RUNNING) |
1633 | return 1; | |
89ffcd2a LP |
1634 | |
1635 | for (;;) { | |
1636 | r = sd_bus_process(bus, NULL); | |
1637 | if (r < 0) | |
1638 | return r; | |
d728d708 LP |
1639 | if (bus->state == BUS_RUNNING) |
1640 | return 1; | |
e3017af9 LP |
1641 | if (r > 0) |
1642 | continue; | |
89ffcd2a LP |
1643 | |
1644 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1645 | if (r < 0) | |
1646 | return r; | |
1647 | } | |
1648 | } | |
1649 | ||
c49b30a2 | 1650 | _public_ int sd_bus_call( |
de1c301e LP |
1651 | sd_bus *bus, |
1652 | sd_bus_message *m, | |
1653 | uint64_t usec, | |
1654 | sd_bus_error *error, | |
1655 | sd_bus_message **reply) { | |
1656 | ||
de1c301e LP |
1657 | usec_t timeout; |
1658 | uint64_t serial; | |
7d22c717 LP |
1659 | unsigned i; |
1660 | int r; | |
de1c301e | 1661 | |
d6888822 LP |
1662 | assert_return(bus, -EINVAL); |
1663 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1664 | assert_return(m, -EINVAL); | |
40ca29a1 | 1665 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1666 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1667 | assert_return(!bus_error_is_dirty(error), -EINVAL); |
1668 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1669 | |
20902f3e | 1670 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1671 | if (r < 0) |
1672 | return r; | |
de1c301e | 1673 | |
a43b9ca3 LP |
1674 | i = bus->rqueue_size; |
1675 | ||
de1c301e LP |
1676 | r = sd_bus_send(bus, m, &serial); |
1677 | if (r < 0) | |
1678 | return r; | |
1679 | ||
1680 | timeout = calc_elapse(usec); | |
1681 | ||
1682 | for (;;) { | |
1683 | usec_t left; | |
de1c301e | 1684 | |
7d22c717 LP |
1685 | while (i < bus->rqueue_size) { |
1686 | sd_bus_message *incoming = NULL; | |
1687 | ||
1688 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1689 | |
de1c301e LP |
1690 | if (incoming->reply_serial == serial) { |
1691 | /* Found a match! */ | |
1692 | ||
7d22c717 LP |
1693 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1694 | bus->rqueue_size--; | |
1695 | ||
40ca29a1 | 1696 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1697 | |
1698 | if (reply) | |
1699 | *reply = incoming; | |
1700 | else | |
1701 | sd_bus_message_unref(incoming); | |
1702 | ||
7a37d625 | 1703 | return 1; |
a43b9ca3 | 1704 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1705 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1706 | else |
1707 | r = -EIO; | |
de1c301e LP |
1708 | |
1709 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 1710 | return r; |
a8a07f89 LP |
1711 | |
1712 | } else if (incoming->header->serial == serial && | |
1713 | bus->unique_name && | |
1714 | incoming->sender && | |
1715 | streq(bus->unique_name, incoming->sender)) { | |
1716 | ||
7d22c717 LP |
1717 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1718 | bus->rqueue_size--; | |
1719 | ||
a8a07f89 LP |
1720 | /* Our own message? Somebody is trying |
1721 | * to send its own client a message, | |
1722 | * let's not dead-lock, let's fail | |
1723 | * immediately. */ | |
1724 | ||
1725 | sd_bus_message_unref(incoming); | |
1726 | return -ELOOP; | |
de1c301e LP |
1727 | } |
1728 | ||
de1c301e | 1729 | /* Try to read more, right-away */ |
7d22c717 | 1730 | i++; |
de1c301e | 1731 | } |
7d22c717 | 1732 | |
a43b9ca3 | 1733 | r = bus_read_message(bus); |
32f46480 LP |
1734 | if (r < 0) { |
1735 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1736 | bus_enter_closing(bus); | |
1737 | ||
a43b9ca3 | 1738 | return r; |
32f46480 | 1739 | } |
7d22c717 | 1740 | if (r > 0) |
e3017af9 | 1741 | continue; |
de1c301e LP |
1742 | |
1743 | if (timeout > 0) { | |
1744 | usec_t n; | |
1745 | ||
1746 | n = now(CLOCK_MONOTONIC); | |
1747 | if (n >= timeout) | |
1748 | return -ETIMEDOUT; | |
1749 | ||
1750 | left = timeout - n; | |
1751 | } else | |
1752 | left = (uint64_t) -1; | |
1753 | ||
e3017af9 | 1754 | r = bus_poll(bus, true, left); |
de1c301e LP |
1755 | if (r < 0) |
1756 | return r; | |
1757 | ||
1758 | r = dispatch_wqueue(bus); | |
32f46480 LP |
1759 | if (r < 0) { |
1760 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1761 | bus_enter_closing(bus); | |
1762 | ||
de1c301e | 1763 | return r; |
32f46480 | 1764 | } |
de1c301e LP |
1765 | } |
1766 | } | |
1767 | ||
d9f644e2 | 1768 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1769 | |
1770 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1771 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1772 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1773 | |
e82c9509 | 1774 | return bus->input_fd; |
de1c301e LP |
1775 | } |
1776 | ||
d9f644e2 | 1777 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1778 | int flags = 0; |
1779 | ||
d6888822 | 1780 | assert_return(bus, -EINVAL); |
718db961 | 1781 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1782 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e LP |
1783 | |
1784 | if (bus->state == BUS_OPENING) | |
1785 | flags |= POLLOUT; | |
89ffcd2a LP |
1786 | else if (bus->state == BUS_AUTHENTICATING) { |
1787 | ||
2181a7f5 | 1788 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1789 | flags |= POLLOUT; |
1790 | ||
1791 | flags |= POLLIN; | |
1792 | ||
1793 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1794 | if (bus->rqueue_size <= 0) |
1795 | flags |= POLLIN; | |
1796 | if (bus->wqueue_size > 0) | |
1797 | flags |= POLLOUT; | |
1798 | } | |
1799 | ||
1800 | return flags; | |
1801 | } | |
1802 | ||
d9f644e2 | 1803 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
1804 | struct reply_callback *c; |
1805 | ||
d6888822 LP |
1806 | assert_return(bus, -EINVAL); |
1807 | assert_return(timeout_usec, -EINVAL); | |
718db961 | 1808 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1809 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 1810 | |
718db961 LP |
1811 | if (bus->state == BUS_CLOSING) { |
1812 | *timeout_usec = 0; | |
1813 | return 1; | |
1814 | } | |
1815 | ||
e3017af9 LP |
1816 | if (bus->state == BUS_AUTHENTICATING) { |
1817 | *timeout_usec = bus->auth_timeout; | |
1818 | return 1; | |
1819 | } | |
1820 | ||
adee69fa LP |
1821 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1822 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1823 | return 0; |
adee69fa | 1824 | } |
e3017af9 | 1825 | |
8efd6381 LP |
1826 | if (bus->rqueue_size > 0) { |
1827 | *timeout_usec = 0; | |
1828 | return 1; | |
1829 | } | |
1830 | ||
e3017af9 | 1831 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
1832 | if (!c) { |
1833 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1834 | return 0; |
adee69fa | 1835 | } |
e3017af9 LP |
1836 | |
1837 | *timeout_usec = c->timeout; | |
1838 | return 1; | |
1839 | } | |
1840 | ||
1841 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 1842 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 1843 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1844 | struct reply_callback *c; |
1845 | usec_t n; | |
1846 | int r; | |
1847 | ||
1848 | assert(bus); | |
1849 | ||
1850 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1851 | if (!c) | |
1852 | return 0; | |
1853 | ||
1854 | n = now(CLOCK_MONOTONIC); | |
1855 | if (c->timeout > n) | |
1856 | return 0; | |
1857 | ||
eb01ba5d LP |
1858 | r = bus_message_new_synthetic_error( |
1859 | bus, | |
1860 | c->serial, | |
14c24659 | 1861 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
1862 | &m); |
1863 | if (r < 0) | |
1864 | return r; | |
1865 | ||
34a2c9e8 LP |
1866 | m->sender = "org.freedesktop.DBus"; |
1867 | ||
7adc46fc | 1868 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
1869 | if (r < 0) |
1870 | return r; | |
1871 | ||
e3017af9 LP |
1872 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1873 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1874 | ||
718db961 LP |
1875 | bus->current = m; |
1876 | bus->iteration_counter ++; | |
1877 | ||
ebcf1f97 LP |
1878 | r = c->callback(bus, m, c->userdata, &error_buffer); |
1879 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
e3017af9 LP |
1880 | free(c); |
1881 | ||
718db961 LP |
1882 | bus->current = NULL; |
1883 | ||
ebcf1f97 | 1884 | return r; |
e3017af9 LP |
1885 | } |
1886 | ||
9d373862 LP |
1887 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1888 | assert(bus); | |
1889 | assert(m); | |
1890 | ||
1891 | if (bus->state != BUS_HELLO) | |
1892 | return 0; | |
1893 | ||
1894 | /* Let's make sure the first message on the bus is the HELLO | |
1895 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1896 | * here (we leave that to the usual handling), we just verify |
1897 | * we don't let any earlier msg through. */ | |
9d373862 | 1898 | |
40ca29a1 LP |
1899 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1900 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
1901 | return -EIO; |
1902 | ||
1903 | if (m->reply_serial != bus->hello_serial) | |
1904 | return -EIO; | |
1905 | ||
1906 | return 0; | |
1907 | } | |
1908 | ||
a652755d | 1909 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
ebcf1f97 | 1910 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
1911 | struct reply_callback *c; |
1912 | int r; | |
1913 | ||
1914 | assert(bus); | |
1915 | assert(m); | |
1916 | ||
40ca29a1 LP |
1917 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1918 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
1919 | return 0; |
1920 | ||
1921 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1922 | if (!c) | |
1923 | return 0; | |
1924 | ||
1925 | if (c->timeout != 0) | |
1926 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1927 | ||
88fe224c LP |
1928 | r = sd_bus_message_rewind(m, true); |
1929 | if (r < 0) | |
1930 | return r; | |
1931 | ||
ebcf1f97 LP |
1932 | r = c->callback(bus, m, c->userdata, &error_buffer); |
1933 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
a652755d LP |
1934 | free(c); |
1935 | ||
ebcf1f97 | 1936 | return r; |
a652755d LP |
1937 | } |
1938 | ||
1939 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 1940 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
1941 | struct filter_callback *l; |
1942 | int r; | |
1943 | ||
392d5b37 LP |
1944 | assert(bus); |
1945 | assert(m); | |
1946 | ||
7286037f LP |
1947 | do { |
1948 | bus->filter_callbacks_modified = false; | |
1949 | ||
1950 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1951 | ||
1952 | if (bus->filter_callbacks_modified) | |
1953 | break; | |
1954 | ||
1955 | /* Don't run this more than once per iteration */ | |
1956 | if (l->last_iteration == bus->iteration_counter) | |
1957 | continue; | |
1958 | ||
1959 | l->last_iteration = bus->iteration_counter; | |
1960 | ||
88fe224c LP |
1961 | r = sd_bus_message_rewind(m, true); |
1962 | if (r < 0) | |
1963 | return r; | |
1964 | ||
969987ea | 1965 | r = l->callback(bus, m, l->userdata, &error_buffer); |
ebcf1f97 | 1966 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
1967 | if (r != 0) |
1968 | return r; | |
1969 | ||
1970 | } | |
1971 | ||
1972 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1973 | |
1974 | return 0; | |
1975 | } | |
1976 | ||
392d5b37 | 1977 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1978 | int r; |
1979 | ||
392d5b37 LP |
1980 | assert(bus); |
1981 | assert(m); | |
1982 | ||
7286037f LP |
1983 | do { |
1984 | bus->match_callbacks_modified = false; | |
1985 | ||
eb01ba5d | 1986 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1987 | if (r != 0) |
1988 | return r; | |
1989 | ||
1990 | } while (bus->match_callbacks_modified); | |
1991 | ||
1992 | return 0; | |
392d5b37 LP |
1993 | } |
1994 | ||
b9bf7e2b LP |
1995 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1996 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1997 | int r; | |
1998 | ||
1999 | assert(bus); | |
2000 | assert(m); | |
2001 | ||
40ca29a1 | 2002 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2003 | return 0; |
2004 | ||
2005 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2006 | return 0; | |
2007 | ||
0461f8cd | 2008 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2009 | return 1; |
2010 | ||
2011 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2012 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2013 | else if (streq_ptr(m->member, "GetMachineId")) { |
2014 | sd_id128_t id; | |
2015 | char sid[33]; | |
2016 | ||
2017 | r = sd_id128_get_machine(&id); | |
2018 | if (r < 0) | |
2019 | return r; | |
2020 | ||
df2d202e | 2021 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2022 | if (r < 0) |
2023 | return r; | |
2024 | ||
2025 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2026 | } else { | |
29ddb38f | 2027 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2028 | m, &reply, |
40ca29a1 | 2029 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2030 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2031 | } |
2032 | ||
2033 | if (r < 0) | |
2034 | return r; | |
2035 | ||
2036 | r = sd_bus_send(bus, reply, NULL); | |
2037 | if (r < 0) | |
2038 | return r; | |
2039 | ||
2040 | return 1; | |
2041 | } | |
2042 | ||
992c052c | 2043 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2044 | int r; |
2045 | ||
2046 | assert(bus); | |
992c052c | 2047 | assert(m); |
e3017af9 | 2048 | |
affff0b6 | 2049 | bus->current = m; |
992c052c | 2050 | bus->iteration_counter++; |
e3017af9 | 2051 | |
40ca29a1 LP |
2052 | log_debug("Got message sender=%s object=%s interface=%s member=%s", |
2053 | strna(sd_bus_message_get_sender(m)), | |
2054 | strna(sd_bus_message_get_path(m)), | |
2055 | strna(sd_bus_message_get_interface(m)), | |
2056 | strna(sd_bus_message_get_member(m))); | |
2057 | ||
992c052c LP |
2058 | r = process_hello(bus, m); |
2059 | if (r != 0) | |
affff0b6 | 2060 | goto finish; |
a652755d | 2061 | |
992c052c LP |
2062 | r = process_reply(bus, m); |
2063 | if (r != 0) | |
affff0b6 | 2064 | goto finish; |
e3017af9 | 2065 | |
992c052c LP |
2066 | r = process_filter(bus, m); |
2067 | if (r != 0) | |
affff0b6 | 2068 | goto finish; |
a652755d | 2069 | |
992c052c LP |
2070 | r = process_match(bus, m); |
2071 | if (r != 0) | |
affff0b6 | 2072 | goto finish; |
a652755d | 2073 | |
992c052c LP |
2074 | r = process_builtin(bus, m); |
2075 | if (r != 0) | |
affff0b6 LP |
2076 | goto finish; |
2077 | ||
2078 | r = bus_process_object(bus, m); | |
a652755d | 2079 | |
affff0b6 LP |
2080 | finish: |
2081 | bus->current = NULL; | |
2082 | return r; | |
29ddb38f | 2083 | } |
88fe224c | 2084 | |
992c052c LP |
2085 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
2086 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 2087 | int r; |
a652755d | 2088 | |
29ddb38f | 2089 | assert(bus); |
992c052c | 2090 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2091 | |
992c052c LP |
2092 | r = process_timeout(bus); |
2093 | if (r != 0) | |
2094 | goto null_message; | |
7286037f | 2095 | |
992c052c LP |
2096 | r = dispatch_wqueue(bus); |
2097 | if (r != 0) | |
2098 | goto null_message; | |
7286037f | 2099 | |
992c052c LP |
2100 | r = dispatch_rqueue(bus, &m); |
2101 | if (r < 0) | |
2102 | return r; | |
2103 | if (!m) | |
2104 | goto null_message; | |
7286037f | 2105 | |
992c052c LP |
2106 | r = process_message(bus, m); |
2107 | if (r != 0) | |
2108 | goto null_message; | |
7286037f | 2109 | |
992c052c LP |
2110 | if (ret) { |
2111 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2112 | if (r < 0) |
2113 | return r; | |
e3017af9 | 2114 | |
992c052c LP |
2115 | *ret = m; |
2116 | m = NULL; | |
2117 | return 1; | |
2118 | } | |
a652755d | 2119 | |
40ca29a1 | 2120 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2121 | |
992c052c | 2122 | r = sd_bus_reply_method_errorf( |
df2d202e | 2123 | m, |
40ca29a1 | 2124 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2125 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2126 | if (r < 0) |
2127 | return r; | |
2128 | } | |
e3017af9 | 2129 | |
992c052c | 2130 | return 1; |
0a72c2bd | 2131 | |
992c052c LP |
2132 | null_message: |
2133 | if (r >= 0 && ret) | |
2134 | *ret = NULL; | |
0a72c2bd | 2135 | |
992c052c | 2136 | return r; |
29ddb38f | 2137 | } |
0a72c2bd | 2138 | |
718db961 LP |
2139 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2140 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2141 | struct reply_callback *c; | |
2142 | int r; | |
2143 | ||
2144 | assert(bus); | |
2145 | assert(bus->state == BUS_CLOSING); | |
2146 | ||
2147 | c = hashmap_first(bus->reply_callbacks); | |
2148 | if (c) { | |
ebcf1f97 LP |
2149 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2150 | ||
718db961 LP |
2151 | /* First, fail all outstanding method calls */ |
2152 | r = bus_message_new_synthetic_error( | |
2153 | bus, | |
2154 | c->serial, | |
14c24659 | 2155 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2156 | &m); |
2157 | if (r < 0) | |
2158 | return r; | |
2159 | ||
7adc46fc | 2160 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2161 | if (r < 0) |
2162 | return r; | |
2163 | ||
2164 | if (c->timeout != 0) | |
2165 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2166 | ||
2167 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
2168 | ||
2169 | bus->current = m; | |
2170 | bus->iteration_counter++; | |
2171 | ||
ebcf1f97 LP |
2172 | r = c->callback(bus, m, c->userdata, &error_buffer); |
2173 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
718db961 LP |
2174 | free(c); |
2175 | ||
718db961 LP |
2176 | goto finish; |
2177 | } | |
2178 | ||
2179 | /* Then, synthesize a Disconnected message */ | |
2180 | r = sd_bus_message_new_signal( | |
2181 | bus, | |
2182 | "/org/freedesktop/DBus/Local", | |
2183 | "org.freedesktop.DBus.Local", | |
2184 | "Disconnected", | |
2185 | &m); | |
2186 | if (r < 0) | |
2187 | return r; | |
2188 | ||
34a2c9e8 LP |
2189 | m->sender = "org.freedesktop.DBus.Local"; |
2190 | ||
7adc46fc | 2191 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2192 | if (r < 0) |
2193 | return r; | |
2194 | ||
2195 | sd_bus_close(bus); | |
2196 | ||
2197 | bus->current = m; | |
2198 | bus->iteration_counter++; | |
2199 | ||
2200 | r = process_filter(bus, m); | |
2201 | if (r != 0) | |
2202 | goto finish; | |
2203 | ||
2204 | r = process_match(bus, m); | |
2205 | if (r != 0) | |
2206 | goto finish; | |
2207 | ||
2208 | if (ret) { | |
2209 | *ret = m; | |
2210 | m = NULL; | |
2211 | } | |
2212 | ||
2213 | r = 1; | |
2214 | ||
2215 | finish: | |
2216 | bus->current = NULL; | |
2217 | return r; | |
2218 | } | |
2219 | ||
d9f644e2 | 2220 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 2221 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2222 | int r; |
0a72c2bd | 2223 | |
992c052c LP |
2224 | /* Returns 0 when we didn't do anything. This should cause the |
2225 | * caller to invoke sd_bus_wait() before returning the next | |
2226 | * time. Returns > 0 when we did something, which possibly | |
2227 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2228 | |
d6888822 LP |
2229 | assert_return(bus, -EINVAL); |
2230 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2231 | |
992c052c | 2232 | /* We don't allow recursively invoking sd_bus_process(). */ |
718db961 | 2233 | assert_return(!bus->current, -EBUSY); |
0a72c2bd | 2234 | |
992c052c | 2235 | switch (bus->state) { |
0a72c2bd | 2236 | |
992c052c LP |
2237 | case BUS_UNSET: |
2238 | case BUS_CLOSED: | |
2239 | return -ENOTCONN; | |
0a72c2bd | 2240 | |
992c052c LP |
2241 | case BUS_OPENING: |
2242 | r = bus_socket_process_opening(bus); | |
32f46480 | 2243 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2244 | bus_enter_closing(bus); |
2245 | r = 1; | |
2246 | } else if (r < 0) | |
29ddb38f | 2247 | return r; |
992c052c LP |
2248 | if (ret) |
2249 | *ret = NULL; | |
a652755d LP |
2250 | return r; |
2251 | ||
992c052c | 2252 | case BUS_AUTHENTICATING: |
992c052c | 2253 | r = bus_socket_process_authenticating(bus); |
32f46480 | 2254 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2255 | bus_enter_closing(bus); |
2256 | r = 1; | |
2257 | } else if (r < 0) | |
29ddb38f | 2258 | return r; |
718db961 | 2259 | |
992c052c LP |
2260 | if (ret) |
2261 | *ret = NULL; | |
718db961 | 2262 | |
992c052c | 2263 | return r; |
a652755d | 2264 | |
992c052c LP |
2265 | case BUS_RUNNING: |
2266 | case BUS_HELLO: | |
992c052c | 2267 | r = process_running(bus, ret); |
32f46480 | 2268 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2269 | bus_enter_closing(bus); |
2270 | r = 1; | |
2271 | ||
2272 | if (ret) | |
2273 | *ret = NULL; | |
2274 | } | |
43a43f50 | 2275 | |
43a43f50 | 2276 | return r; |
718db961 LP |
2277 | |
2278 | case BUS_CLOSING: | |
2279 | return process_closing(bus, ret); | |
992c052c | 2280 | } |
43a43f50 | 2281 | |
992c052c | 2282 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2283 | } |
2284 | ||
992c052c LP |
2285 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2286 | struct pollfd p[2] = {}; | |
2287 | int r, e, n; | |
2288 | struct timespec ts; | |
8efd6381 | 2289 | usec_t m = (usec_t) -1; |
adcdb374 LP |
2290 | |
2291 | assert(bus); | |
718db961 LP |
2292 | |
2293 | if (bus->state == BUS_CLOSING) | |
2294 | return 1; | |
2295 | ||
d6888822 | 2296 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 2297 | |
992c052c LP |
2298 | e = sd_bus_get_events(bus); |
2299 | if (e < 0) | |
2300 | return e; | |
adcdb374 | 2301 | |
992c052c | 2302 | if (need_more) |
8efd6381 LP |
2303 | /* The caller really needs some more data, he doesn't |
2304 | * care about what's already read, or any timeouts | |
2305 | * except its own.*/ | |
992c052c | 2306 | e |= POLLIN; |
992c052c | 2307 | else { |
8efd6381 LP |
2308 | usec_t until; |
2309 | /* The caller wants to process if there's something to | |
2310 | * process, but doesn't care otherwise */ | |
2311 | ||
2312 | r = sd_bus_get_timeout(bus, &until); | |
2313 | if (r < 0) | |
2314 | return r; | |
2315 | if (r > 0) { | |
2316 | usec_t nw; | |
2317 | nw = now(CLOCK_MONOTONIC); | |
2318 | m = until > nw ? until - nw : 0; | |
2319 | } | |
992c052c | 2320 | } |
adcdb374 | 2321 | |
992c052c LP |
2322 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2323 | m = timeout_usec; | |
adcdb374 | 2324 | |
992c052c LP |
2325 | p[0].fd = bus->input_fd; |
2326 | if (bus->output_fd == bus->input_fd) { | |
2327 | p[0].events = e; | |
2328 | n = 1; | |
2329 | } else { | |
2330 | p[0].events = e & POLLIN; | |
2331 | p[1].fd = bus->output_fd; | |
2332 | p[1].events = e & POLLOUT; | |
2333 | n = 2; | |
adcdb374 LP |
2334 | } |
2335 | ||
992c052c | 2336 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2337 | if (r < 0) |
992c052c | 2338 | return -errno; |
adcdb374 | 2339 | |
992c052c | 2340 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2341 | } |
2342 | ||
d9f644e2 | 2343 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2344 | |
d6888822 | 2345 | assert_return(bus, -EINVAL); |
d6888822 | 2346 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2347 | |
718db961 LP |
2348 | if (bus->state == BUS_CLOSING) |
2349 | return 0; | |
2350 | ||
2351 | assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN); | |
2352 | ||
992c052c LP |
2353 | if (bus->rqueue_size > 0) |
2354 | return 0; | |
9db76355 | 2355 | |
992c052c LP |
2356 | return bus_poll(bus, false, timeout_usec); |
2357 | } | |
9db76355 | 2358 | |
d9f644e2 | 2359 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2360 | int r; |
9db76355 | 2361 | |
d6888822 | 2362 | assert_return(bus, -EINVAL); |
d6888822 | 2363 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2364 | |
718db961 LP |
2365 | if (bus->state == BUS_CLOSING) |
2366 | return 0; | |
2367 | ||
2368 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2369 | ||
992c052c LP |
2370 | r = bus_ensure_running(bus); |
2371 | if (r < 0) | |
2372 | return r; | |
9db76355 | 2373 | |
992c052c LP |
2374 | if (bus->wqueue_size <= 0) |
2375 | return 0; | |
9db76355 | 2376 | |
992c052c LP |
2377 | for (;;) { |
2378 | r = dispatch_wqueue(bus); | |
32f46480 LP |
2379 | if (r < 0) { |
2380 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
2381 | bus_enter_closing(bus); | |
2382 | ||
9db76355 | 2383 | return r; |
32f46480 | 2384 | } |
9db76355 | 2385 | |
992c052c LP |
2386 | if (bus->wqueue_size <= 0) |
2387 | return 0; | |
9db76355 | 2388 | |
992c052c | 2389 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2390 | if (r < 0) |
2391 | return r; | |
9db76355 | 2392 | } |
9db76355 LP |
2393 | } |
2394 | ||
d9f644e2 ZJS |
2395 | _public_ int sd_bus_add_filter(sd_bus *bus, |
2396 | sd_bus_message_handler_t callback, | |
2397 | void *userdata) { | |
2398 | ||
992c052c | 2399 | struct filter_callback *f; |
de1c301e | 2400 | |
d6888822 LP |
2401 | assert_return(bus, -EINVAL); |
2402 | assert_return(callback, -EINVAL); | |
2403 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2404 | |
992c052c LP |
2405 | f = new0(struct filter_callback, 1); |
2406 | if (!f) | |
29ddb38f | 2407 | return -ENOMEM; |
992c052c LP |
2408 | f->callback = callback; |
2409 | f->userdata = userdata; | |
29ddb38f | 2410 | |
992c052c | 2411 | bus->filter_callbacks_modified = true; |
71fda00f | 2412 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2413 | return 0; |
2414 | } | |
a652755d | 2415 | |
d9f644e2 ZJS |
2416 | _public_ int sd_bus_remove_filter(sd_bus *bus, |
2417 | sd_bus_message_handler_t callback, | |
2418 | void *userdata) { | |
2419 | ||
992c052c | 2420 | struct filter_callback *f; |
a652755d | 2421 | |
d6888822 LP |
2422 | assert_return(bus, -EINVAL); |
2423 | assert_return(callback, -EINVAL); | |
2424 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2425 | |
992c052c LP |
2426 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2427 | if (f->callback == callback && f->userdata == userdata) { | |
2428 | bus->filter_callbacks_modified = true; | |
71fda00f | 2429 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2430 | free(f); |
2431 | return 1; | |
29ddb38f LP |
2432 | } |
2433 | } | |
2434 | ||
992c052c | 2435 | return 0; |
a652755d | 2436 | } |
392d5b37 | 2437 | |
d9f644e2 ZJS |
2438 | _public_ int sd_bus_add_match(sd_bus *bus, |
2439 | const char *match, | |
2440 | sd_bus_message_handler_t callback, | |
2441 | void *userdata) { | |
2442 | ||
992c052c LP |
2443 | struct bus_match_component *components = NULL; |
2444 | unsigned n_components = 0; | |
2445 | uint64_t cookie = 0; | |
2446 | int r = 0; | |
392d5b37 | 2447 | |
d6888822 LP |
2448 | assert_return(bus, -EINVAL); |
2449 | assert_return(match, -EINVAL); | |
2450 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2451 | |
992c052c LP |
2452 | r = bus_match_parse(match, &components, &n_components); |
2453 | if (r < 0) | |
2454 | goto finish; | |
29ddb38f | 2455 | |
992c052c LP |
2456 | if (bus->bus_client) { |
2457 | cookie = ++bus->match_cookie; | |
29ddb38f | 2458 | |
992c052c LP |
2459 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2460 | if (r < 0) | |
2461 | goto finish; | |
392d5b37 LP |
2462 | } |
2463 | ||
992c052c LP |
2464 | bus->match_callbacks_modified = true; |
2465 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2466 | if (r < 0) { |
992c052c LP |
2467 | if (bus->bus_client) |
2468 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2469 | } |
917b5dc7 | 2470 | |
992c052c LP |
2471 | finish: |
2472 | bus_match_parse_free(components, n_components); | |
2473 | return r; | |
917b5dc7 LP |
2474 | } |
2475 | ||
d9f644e2 ZJS |
2476 | _public_ int sd_bus_remove_match(sd_bus *bus, |
2477 | const char *match, | |
2478 | sd_bus_message_handler_t callback, | |
2479 | void *userdata) { | |
2480 | ||
992c052c LP |
2481 | struct bus_match_component *components = NULL; |
2482 | unsigned n_components = 0; | |
2483 | int r = 0, q = 0; | |
2484 | uint64_t cookie = 0; | |
917b5dc7 | 2485 | |
d6888822 LP |
2486 | assert_return(bus, -EINVAL); |
2487 | assert_return(match, -EINVAL); | |
2488 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2489 | |
992c052c | 2490 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2491 | if (r < 0) |
2492 | return r; | |
f10dda3b | 2493 | |
992c052c LP |
2494 | bus->match_callbacks_modified = true; |
2495 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2496 | |
992c052c LP |
2497 | if (bus->bus_client) |
2498 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2499 | |
992c052c | 2500 | bus_match_parse_free(components, n_components); |
f10dda3b | 2501 | |
992c052c | 2502 | return r < 0 ? r : q; |
f10dda3b LP |
2503 | } |
2504 | ||
992c052c LP |
2505 | bool bus_pid_changed(sd_bus *bus) { |
2506 | assert(bus); | |
f10dda3b | 2507 | |
992c052c LP |
2508 | /* We don't support people creating a bus connection and |
2509 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2510 | |
992c052c | 2511 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2512 | } |
40ca29a1 LP |
2513 | |
2514 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2515 | sd_bus *bus = userdata; |
40ca29a1 LP |
2516 | int r; |
2517 | ||
2518 | assert(bus); | |
2519 | ||
2520 | r = sd_bus_process(bus, NULL); | |
2521 | if (r < 0) | |
2522 | return r; | |
2523 | ||
2524 | return 1; | |
2525 | } | |
2526 | ||
2527 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2528 | sd_bus *bus = userdata; |
40ca29a1 LP |
2529 | int r; |
2530 | ||
2531 | assert(bus); | |
2532 | ||
2533 | r = sd_bus_process(bus, NULL); | |
2534 | if (r < 0) | |
2535 | return r; | |
2536 | ||
2537 | return 1; | |
2538 | } | |
2539 | ||
2540 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2541 | sd_bus *bus = userdata; | |
2542 | int r, e; | |
2543 | usec_t until; | |
2544 | ||
2545 | assert(s); | |
2546 | assert(bus); | |
2547 | ||
2548 | e = sd_bus_get_events(bus); | |
2549 | if (e < 0) | |
2550 | return e; | |
2551 | ||
2552 | if (bus->output_fd != bus->input_fd) { | |
2553 | ||
2554 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2555 | if (r < 0) | |
2556 | return r; | |
2557 | ||
2558 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2559 | if (r < 0) | |
2560 | return r; | |
2561 | } else { | |
2562 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2563 | if (r < 0) | |
2564 | return r; | |
2565 | } | |
2566 | ||
2567 | r = sd_bus_get_timeout(bus, &until); | |
2568 | if (r < 0) | |
2569 | return r; | |
2570 | if (r > 0) { | |
2571 | int j; | |
2572 | ||
2573 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2574 | if (j < 0) | |
2575 | return j; | |
2576 | } | |
2577 | ||
2578 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2579 | if (r < 0) | |
2580 | return r; | |
2581 | ||
2582 | return 1; | |
2583 | } | |
2584 | ||
abc5fe72 LP |
2585 | static int quit_callback(sd_event_source *event, void *userdata) { |
2586 | sd_bus *bus = userdata; | |
2587 | ||
2588 | assert(event); | |
2589 | ||
2590 | sd_bus_flush(bus); | |
2591 | ||
2592 | return 1; | |
2593 | } | |
2594 | ||
d9f644e2 | 2595 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
2596 | int r; |
2597 | ||
2598 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
2599 | assert_return(!bus->event, -EBUSY); |
2600 | ||
2601 | assert(!bus->input_io_event_source); | |
2602 | assert(!bus->output_io_event_source); | |
2603 | assert(!bus->time_event_source); | |
2604 | ||
76b54375 LP |
2605 | if (event) |
2606 | bus->event = sd_event_ref(event); | |
2607 | else { | |
2608 | r = sd_event_default(&bus->event); | |
2609 | if (r < 0) | |
2610 | return r; | |
2611 | } | |
40ca29a1 | 2612 | |
76b54375 | 2613 | r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); |
40ca29a1 LP |
2614 | if (r < 0) |
2615 | goto fail; | |
2616 | ||
2617 | r = sd_event_source_set_priority(bus->input_io_event_source, priority); | |
2618 | if (r < 0) | |
2619 | goto fail; | |
2620 | ||
2621 | if (bus->output_fd != bus->input_fd) { | |
76b54375 | 2622 | r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); |
40ca29a1 LP |
2623 | if (r < 0) |
2624 | goto fail; | |
2625 | ||
2626 | r = sd_event_source_set_priority(bus->output_io_event_source, priority); | |
2627 | if (r < 0) | |
2628 | goto fail; | |
2629 | } | |
2630 | ||
2631 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2632 | if (r < 0) | |
2633 | goto fail; | |
2634 | ||
76b54375 | 2635 | r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source); |
40ca29a1 LP |
2636 | if (r < 0) |
2637 | goto fail; | |
2638 | ||
2639 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2640 | if (r < 0) | |
2641 | goto fail; | |
2642 | ||
76b54375 | 2643 | r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source); |
abc5fe72 LP |
2644 | if (r < 0) |
2645 | goto fail; | |
2646 | ||
40ca29a1 LP |
2647 | return 0; |
2648 | ||
2649 | fail: | |
2650 | sd_bus_detach_event(bus); | |
2651 | return r; | |
2652 | } | |
2653 | ||
d9f644e2 | 2654 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 2655 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
2656 | |
2657 | if (!bus->event) | |
2658 | return 0; | |
40ca29a1 | 2659 | |
86befb40 LP |
2660 | if (bus->input_io_event_source) { |
2661 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2662 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); |
86befb40 | 2663 | } |
40ca29a1 | 2664 | |
86befb40 LP |
2665 | if (bus->output_io_event_source) { |
2666 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2667 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); |
86befb40 | 2668 | } |
40ca29a1 | 2669 | |
86befb40 LP |
2670 | if (bus->time_event_source) { |
2671 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2672 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 2673 | } |
40ca29a1 | 2674 | |
86befb40 LP |
2675 | if (bus->quit_event_source) { |
2676 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 2677 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 2678 | } |
abc5fe72 | 2679 | |
40ca29a1 LP |
2680 | if (bus->event) |
2681 | bus->event = sd_event_unref(bus->event); | |
2682 | ||
a82cafb9 | 2683 | return 1; |
40ca29a1 | 2684 | } |
affff0b6 | 2685 | |
2be44176 LP |
2686 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
2687 | assert_return(bus, NULL); | |
2688 | ||
2689 | return bus->event; | |
2690 | } | |
2691 | ||
76b54375 | 2692 | _public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) { |
affff0b6 LP |
2693 | assert_return(bus, NULL); |
2694 | ||
2695 | return bus->current; | |
2696 | } | |
76b54375 LP |
2697 | |
2698 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { | |
2699 | sd_bus *b = NULL; | |
2700 | int r; | |
2701 | ||
2702 | assert(bus_open); | |
2703 | assert(default_bus); | |
2704 | ||
2705 | if (!ret) | |
2706 | return !!*default_bus; | |
2707 | ||
2708 | if (*default_bus) { | |
2709 | *ret = sd_bus_ref(*default_bus); | |
2710 | return 0; | |
2711 | } | |
2712 | ||
2713 | r = bus_open(&b); | |
2714 | if (r < 0) | |
2715 | return r; | |
2716 | ||
2717 | b->default_bus_ptr = default_bus; | |
2718 | b->tid = gettid(); | |
2719 | *default_bus = b; | |
2720 | ||
2721 | *ret = b; | |
2722 | return 1; | |
2723 | } | |
2724 | ||
2725 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
2726 | static __thread sd_bus *default_system_bus = NULL; | |
2727 | ||
2728 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
2729 | } | |
2730 | ||
2731 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
2732 | static __thread sd_bus *default_user_bus = NULL; | |
2733 | ||
2734 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
2735 | } | |
2736 | ||
2737 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { | |
2738 | assert_return(b, -EINVAL); | |
2739 | assert_return(tid, -EINVAL); | |
2740 | assert_return(!bus_pid_changed(b), -ECHILD); | |
2741 | ||
2742 | if (b->tid != 0) { | |
2743 | *tid = b->tid; | |
2744 | return 0; | |
2745 | } | |
2746 | ||
2747 | if (b->event) | |
2748 | return sd_event_get_tid(b->event, tid); | |
2749 | ||
2750 | return -ENXIO; | |
2751 | } | |
28383ba1 LP |
2752 | |
2753 | _public_ char *sd_bus_label_escape(const char *s) { | |
2754 | char *r, *t; | |
2755 | const char *f; | |
2756 | ||
2757 | assert_return(s, NULL); | |
2758 | ||
2759 | /* Escapes all chars that D-Bus' object path cannot deal | |
2760 | * with. Can be reversed with bus_path_unescape(). We special | |
2761 | * case the empty string. */ | |
2762 | ||
2763 | if (*s == 0) | |
2764 | return strdup("_"); | |
2765 | ||
2766 | r = new(char, strlen(s)*3 + 1); | |
2767 | if (!r) | |
2768 | return NULL; | |
2769 | ||
2770 | for (f = s, t = r; *f; f++) { | |
2771 | ||
2772 | /* Escape everything that is not a-zA-Z0-9. We also | |
2773 | * escape 0-9 if it's the first character */ | |
2774 | ||
2775 | if (!(*f >= 'A' && *f <= 'Z') && | |
2776 | !(*f >= 'a' && *f <= 'z') && | |
2777 | !(f > s && *f >= '0' && *f <= '9')) { | |
2778 | *(t++) = '_'; | |
2779 | *(t++) = hexchar(*f >> 4); | |
2780 | *(t++) = hexchar(*f); | |
2781 | } else | |
2782 | *(t++) = *f; | |
2783 | } | |
2784 | ||
2785 | *t = 0; | |
2786 | ||
2787 | return r; | |
2788 | } | |
2789 | ||
2790 | _public_ char *sd_bus_label_unescape(const char *f) { | |
2791 | char *r, *t; | |
2792 | ||
2793 | assert_return(f, NULL); | |
2794 | ||
2795 | /* Special case for the empty string */ | |
2796 | if (streq(f, "_")) | |
2797 | return strdup(""); | |
2798 | ||
2799 | r = new(char, strlen(f) + 1); | |
2800 | if (!r) | |
2801 | return NULL; | |
2802 | ||
2803 | for (t = r; *f; f++) { | |
2804 | ||
2805 | if (*f == '_') { | |
2806 | int a, b; | |
2807 | ||
2808 | if ((a = unhexchar(f[1])) < 0 || | |
2809 | (b = unhexchar(f[2])) < 0) { | |
2810 | /* Invalid escape code, let's take it literal then */ | |
2811 | *(t++) = '_'; | |
2812 | } else { | |
2813 | *(t++) = (char) ((a << 4) | b); | |
2814 | f += 2; | |
2815 | } | |
2816 | } else | |
2817 | *(t++) = *f; | |
2818 | } | |
2819 | ||
2820 | *t = 0; | |
2821 | ||
2822 | return r; | |
2823 | } | |
5b12334d LP |
2824 | |
2825 | _public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { | |
2826 | sd_bus_creds *c; | |
2827 | pid_t pid = 0; | |
2828 | int r; | |
2829 | ||
2830 | assert_return(bus, -EINVAL); | |
95c4fe82 | 2831 | assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP); |
5b12334d LP |
2832 | assert_return(ret, -EINVAL); |
2833 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2834 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2835 | assert_return(!bus->is_kernel, -ENOTSUP); | |
2836 | ||
2837 | if (!bus->ucred_valid && !isempty(bus->label)) | |
2838 | return -ENODATA; | |
2839 | ||
2840 | c = bus_creds_new(); | |
2841 | if (!c) | |
2842 | return -ENOMEM; | |
2843 | ||
2844 | if (bus->ucred_valid) { | |
2845 | pid = c->pid = bus->ucred.pid; | |
2846 | c->uid = bus->ucred.uid; | |
2847 | c->gid = bus->ucred.gid; | |
2848 | ||
3310dfd5 | 2849 | c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask; |
5b12334d LP |
2850 | } |
2851 | ||
2852 | if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) { | |
2853 | c->label = strdup(bus->label); | |
2854 | if (!c->label) { | |
2855 | sd_bus_creds_unref(c); | |
2856 | return -ENOMEM; | |
2857 | } | |
2858 | ||
3310dfd5 | 2859 | c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
5b12334d LP |
2860 | } |
2861 | ||
2862 | r = bus_creds_add_more(c, mask, pid, 0); | |
2863 | if (r < 0) | |
2864 | return r; | |
2865 | ||
2866 | *ret = c; | |
2867 | return 0; | |
2868 | } |