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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 | ||
767 | free(b->machine); | |
768 | b->machine = machine; | |
769 | machine = NULL; | |
770 | ||
771 | b->sockaddr.un.sun_family = AF_UNIX; | |
772 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
773 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1; | |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
2fd9ae2e LP |
778 | static void bus_reset_parsed_address(sd_bus *b) { |
779 | assert(b); | |
780 | ||
781 | zero(b->sockaddr); | |
782 | b->sockaddr_size = 0; | |
783 | strv_free(b->exec_argv); | |
784 | free(b->exec_path); | |
785 | b->exec_path = NULL; | |
786 | b->exec_argv = NULL; | |
98178d39 | 787 | b->server_id = SD_ID128_NULL; |
6629161f LP |
788 | free(b->kernel); |
789 | b->kernel = NULL; | |
a7893c6b LP |
790 | free(b->machine); |
791 | b->machine = NULL; | |
2fd9ae2e LP |
792 | } |
793 | ||
794 | static int bus_parse_next_address(sd_bus *b) { | |
795 | _cleanup_free_ char *guid = NULL; | |
796 | const char *a; | |
797 | int r; | |
798 | ||
799 | assert(b); | |
800 | ||
801 | if (!b->address) | |
802 | return 0; | |
803 | if (b->address[b->address_index] == 0) | |
804 | return 0; | |
805 | ||
806 | bus_reset_parsed_address(b); | |
807 | ||
808 | a = b->address + b->address_index; | |
de1c301e | 809 | |
2fd9ae2e | 810 | while (*a != 0) { |
de1c301e | 811 | |
2fd9ae2e LP |
812 | if (*a == ';') { |
813 | a++; | |
814 | continue; | |
de1c301e LP |
815 | } |
816 | ||
2fd9ae2e LP |
817 | if (startswith(a, "unix:")) { |
818 | a += 5; | |
de1c301e | 819 | |
2fd9ae2e | 820 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
821 | if (r < 0) |
822 | return r; | |
2fd9ae2e | 823 | break; |
de1c301e | 824 | |
2fd9ae2e | 825 | } else if (startswith(a, "tcp:")) { |
de1c301e | 826 | |
2fd9ae2e LP |
827 | a += 4; |
828 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
829 | if (r < 0) |
830 | return r; | |
de1c301e | 831 | |
2fd9ae2e LP |
832 | break; |
833 | ||
834 | } else if (startswith(a, "unixexec:")) { | |
835 | ||
836 | a += 9; | |
837 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
838 | if (r < 0) |
839 | return r; | |
de1c301e | 840 | |
2fd9ae2e | 841 | break; |
de1c301e | 842 | |
6629161f LP |
843 | } else if (startswith(a, "kernel:")) { |
844 | ||
845 | a += 7; | |
846 | r = parse_kernel_address(b, &a, &guid); | |
847 | if (r < 0) | |
848 | return r; | |
849 | ||
a7893c6b LP |
850 | break; |
851 | } else if (startswith(a, "x-container:")) { | |
852 | ||
853 | a += 12; | |
854 | r = parse_container_address(b, &a, &guid); | |
855 | if (r < 0) | |
856 | return r; | |
857 | ||
6629161f | 858 | break; |
de1c301e LP |
859 | } |
860 | ||
2fd9ae2e LP |
861 | a = strchr(a, ';'); |
862 | if (!a) | |
863 | return 0; | |
de1c301e LP |
864 | } |
865 | ||
866 | if (guid) { | |
98178d39 | 867 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
868 | if (r < 0) |
869 | return r; | |
870 | } | |
871 | ||
2fd9ae2e | 872 | b->address_index = a - b->address; |
de1c301e LP |
873 | return 1; |
874 | } | |
875 | ||
a7e3212d | 876 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
877 | int r; |
878 | ||
879 | assert(b); | |
880 | ||
881 | for (;;) { | |
e82c9509 | 882 | sd_bus_close(b); |
2fd9ae2e | 883 | |
a7893c6b | 884 | if (b->exec_path) { |
a7e3212d | 885 | |
a7893c6b | 886 | r = bus_socket_exec(b); |
2fd9ae2e LP |
887 | if (r >= 0) |
888 | return r; | |
889 | ||
890 | b->last_connect_error = -r; | |
a7893c6b | 891 | } else if (b->kernel) { |
2fd9ae2e | 892 | |
a7893c6b LP |
893 | r = bus_kernel_connect(b); |
894 | if (r >= 0) | |
895 | return r; | |
2fd9ae2e | 896 | |
a7893c6b LP |
897 | b->last_connect_error = -r; |
898 | ||
899 | } else if (b->machine) { | |
900 | ||
901 | r = bus_container_connect(b); | |
2fd9ae2e LP |
902 | if (r >= 0) |
903 | return r; | |
904 | ||
6629161f | 905 | b->last_connect_error = -r; |
6629161f | 906 | |
a7893c6b LP |
907 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { |
908 | ||
909 | r = bus_socket_connect(b); | |
6629161f LP |
910 | if (r >= 0) |
911 | return r; | |
912 | ||
2fd9ae2e LP |
913 | b->last_connect_error = -r; |
914 | } | |
915 | ||
916 | r = bus_parse_next_address(b); | |
917 | if (r < 0) | |
918 | return r; | |
919 | if (r == 0) | |
920 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
921 | } |
922 | } | |
923 | ||
a7e3212d LP |
924 | int bus_next_address(sd_bus *b) { |
925 | assert(b); | |
926 | ||
927 | bus_reset_parsed_address(b); | |
928 | return bus_start_address(b); | |
929 | } | |
930 | ||
021a1e78 | 931 | static int bus_start_fd(sd_bus *b) { |
6629161f | 932 | struct stat st; |
021a1e78 LP |
933 | int r; |
934 | ||
935 | assert(b); | |
e82c9509 LP |
936 | assert(b->input_fd >= 0); |
937 | assert(b->output_fd >= 0); | |
021a1e78 | 938 | |
e82c9509 | 939 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
940 | if (r < 0) |
941 | return r; | |
942 | ||
e82c9509 | 943 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
944 | if (r < 0) |
945 | return r; | |
946 | ||
e82c9509 LP |
947 | if (b->input_fd != b->output_fd) { |
948 | r = fd_nonblock(b->output_fd, true); | |
949 | if (r < 0) | |
950 | return r; | |
951 | ||
952 | r = fd_cloexec(b->output_fd, true); | |
953 | if (r < 0) | |
954 | return r; | |
955 | } | |
956 | ||
6629161f LP |
957 | if (fstat(b->input_fd, &st) < 0) |
958 | return -errno; | |
959 | ||
960 | if (S_ISCHR(b->input_fd)) | |
961 | return bus_kernel_take_fd(b); | |
962 | else | |
963 | return bus_socket_take_fd(b); | |
021a1e78 LP |
964 | } |
965 | ||
d9f644e2 | 966 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
967 | int r; |
968 | ||
d6888822 LP |
969 | assert_return(bus, -EINVAL); |
970 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
971 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
972 | |
973 | bus->state = BUS_OPENING; | |
974 | ||
2181a7f5 LP |
975 | if (bus->is_server && bus->bus_client) |
976 | return -EINVAL; | |
977 | ||
e82c9509 | 978 | if (bus->input_fd >= 0) |
021a1e78 | 979 | r = bus_start_fd(bus); |
a7893c6b | 980 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 981 | r = bus_start_address(bus); |
021a1e78 LP |
982 | else |
983 | return -EINVAL; | |
984 | ||
985 | if (r < 0) | |
986 | return r; | |
987 | ||
988 | return bus_send_hello(bus); | |
989 | } | |
990 | ||
d9f644e2 | 991 | _public_ int sd_bus_open_system(sd_bus **ret) { |
de1c301e LP |
992 | const char *e; |
993 | sd_bus *b; | |
994 | int r; | |
995 | ||
d6888822 | 996 | assert_return(ret, -EINVAL); |
de1c301e | 997 | |
021a1e78 LP |
998 | r = sd_bus_new(&b); |
999 | if (r < 0) | |
1000 | return r; | |
1001 | ||
6c03089c | 1002 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
e3dd987c | 1003 | if (e) |
021a1e78 | 1004 | r = sd_bus_set_address(b, e); |
e3dd987c | 1005 | else |
626851be | 1006 | #ifdef ENABLE_KDBUS |
e3dd987c | 1007 | r = sd_bus_set_address(b, "kernel:path=/dev/kdbus/0-system/bus;unix:path=/run/dbus/system_bus_socket"); |
626851be LP |
1008 | #else |
1009 | r = sd_bus_set_address(b, "unix:path=/run/dbus/system_bus_socket"); | |
1010 | #endif | |
e3dd987c LP |
1011 | |
1012 | if (r < 0) | |
1013 | goto fail; | |
de1c301e | 1014 | |
94bbf1ba | 1015 | b->bus_client = true; |
021a1e78 | 1016 | |
adacb957 LP |
1017 | /* Let's do per-method access control on the system bus. We |
1018 | * need the caller's UID and capability set for that. */ | |
1019 | b->trusted = false; | |
1020 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1021 | ||
021a1e78 LP |
1022 | r = sd_bus_start(b); |
1023 | if (r < 0) | |
1024 | goto fail; | |
de1c301e LP |
1025 | |
1026 | *ret = b; | |
1027 | return 0; | |
021a1e78 LP |
1028 | |
1029 | fail: | |
1030 | bus_free(b); | |
1031 | return r; | |
de1c301e LP |
1032 | } |
1033 | ||
d9f644e2 | 1034 | _public_ int sd_bus_open_user(sd_bus **ret) { |
de1c301e LP |
1035 | const char *e; |
1036 | sd_bus *b; | |
de1c301e LP |
1037 | int r; |
1038 | ||
d6888822 | 1039 | assert_return(ret, -EINVAL); |
de1c301e | 1040 | |
021a1e78 LP |
1041 | r = sd_bus_new(&b); |
1042 | if (r < 0) | |
1043 | return r; | |
1044 | ||
6c03089c | 1045 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1046 | if (e) { |
021a1e78 | 1047 | r = sd_bus_set_address(b, e); |
de1c301e | 1048 | if (r < 0) |
021a1e78 | 1049 | goto fail; |
89ffcd2a | 1050 | } else { |
6c03089c | 1051 | e = secure_getenv("XDG_RUNTIME_DIR"); |
e3dd987c LP |
1052 | if (e) { |
1053 | _cleanup_free_ char *ee = NULL; | |
1054 | ||
1055 | ee = bus_address_escape(e); | |
1056 | if (!ee) { | |
626851be | 1057 | r = -ENOMEM; |
e3dd987c LP |
1058 | goto fail; |
1059 | } | |
1060 | ||
626851be | 1061 | #ifdef ENABLE_KDBUS |
e3dd987c | 1062 | asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus;unix:path=%s/bus", (unsigned long) getuid(), ee); |
626851be LP |
1063 | #else |
1064 | b->address = strjoin("unix:path=", ee, "/bus", NULL); | |
1065 | #endif | |
1066 | } else { | |
1067 | #ifdef ENABLE_KDBUS | |
e3dd987c | 1068 | asprintf(&b->address, "kernel:path=/dev/kdbus/%lu-user/bus", (unsigned long) getuid()); |
626851be LP |
1069 | #else |
1070 | return -ECONNREFUSED; | |
1071 | #endif | |
1072 | } | |
de1c301e | 1073 | |
e3dd987c LP |
1074 | if (!b->address) { |
1075 | r = -ENOMEM; | |
021a1e78 LP |
1076 | goto fail; |
1077 | } | |
de1c301e LP |
1078 | } |
1079 | ||
94bbf1ba | 1080 | b->bus_client = true; |
de1c301e | 1081 | |
adacb957 LP |
1082 | /* We don't do any per-method access control on the user |
1083 | * bus. */ | |
1084 | b->trusted = true; | |
1085 | ||
021a1e78 | 1086 | r = sd_bus_start(b); |
2571ead1 LP |
1087 | if (r < 0) |
1088 | goto fail; | |
de1c301e LP |
1089 | |
1090 | *ret = b; | |
1091 | return 0; | |
2571ead1 LP |
1092 | |
1093 | fail: | |
021a1e78 | 1094 | bus_free(b); |
2571ead1 | 1095 | return r; |
de1c301e LP |
1096 | } |
1097 | ||
d9f644e2 | 1098 | _public_ int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
0f8bd8de LP |
1099 | _cleanup_free_ char *e = NULL; |
1100 | char *p = NULL; | |
1101 | sd_bus *bus; | |
1102 | int r; | |
1103 | ||
1104 | assert_return(host, -EINVAL); | |
1105 | assert_return(ret, -EINVAL); | |
1106 | ||
1107 | e = bus_address_escape(host); | |
1108 | if (!e) | |
1109 | return -ENOMEM; | |
1110 | ||
1111 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1112 | if (!p) | |
1113 | return -ENOMEM; | |
a7893c6b LP |
1114 | |
1115 | r = sd_bus_new(&bus); | |
1116 | if (r < 0) { | |
1117 | free(p); | |
1118 | return r; | |
1119 | } | |
1120 | ||
1121 | bus->address = p; | |
1122 | bus->bus_client = true; | |
1123 | ||
1124 | r = sd_bus_start(bus); | |
1125 | if (r < 0) { | |
1126 | bus_free(bus); | |
1127 | return r; | |
1128 | } | |
1129 | ||
1130 | *ret = bus; | |
1131 | return 0; | |
1132 | } | |
1133 | ||
d9f644e2 | 1134 | _public_ int sd_bus_open_system_container(const char *machine, sd_bus **ret) { |
a7893c6b LP |
1135 | _cleanup_free_ char *e = NULL; |
1136 | sd_bus *bus; | |
1137 | char *p; | |
1138 | int r; | |
1139 | ||
1140 | assert_return(machine, -EINVAL); | |
1141 | assert_return(ret, -EINVAL); | |
1142 | ||
1143 | e = bus_address_escape(machine); | |
1144 | if (!e) | |
1145 | return -ENOMEM; | |
1146 | ||
1147 | p = strjoin("x-container:machine=", e, NULL); | |
1148 | if (!p) | |
1149 | return -ENOMEM; | |
0f8bd8de LP |
1150 | |
1151 | r = sd_bus_new(&bus); | |
1152 | if (r < 0) { | |
1153 | free(p); | |
1154 | return r; | |
1155 | } | |
1156 | ||
1157 | bus->address = p; | |
1158 | bus->bus_client = true; | |
1159 | ||
1160 | r = sd_bus_start(bus); | |
1161 | if (r < 0) { | |
1162 | bus_free(bus); | |
1163 | return r; | |
1164 | } | |
1165 | ||
1166 | *ret = bus; | |
1167 | return 0; | |
1168 | } | |
1169 | ||
d9f644e2 | 1170 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1171 | |
de1c301e LP |
1172 | if (!bus) |
1173 | return; | |
d5a2b9a6 LP |
1174 | if (bus->state == BUS_CLOSED) |
1175 | return; | |
1176 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1177 | return; |
1178 | ||
1179 | bus->state = BUS_CLOSED; | |
e82c9509 | 1180 | |
40ca29a1 LP |
1181 | sd_bus_detach_event(bus); |
1182 | ||
0e586eae LP |
1183 | /* Drop all queued messages so that they drop references to |
1184 | * the bus object and the bus may be freed */ | |
1185 | bus_reset_queues(bus); | |
1186 | ||
f54514f3 LP |
1187 | if (!bus->is_kernel) |
1188 | bus_close_fds(bus); | |
1189 | ||
1190 | /* We'll leave the fd open in case this is a kernel bus, since | |
1191 | * there might still be memblocks around that reference this | |
1d0e3c98 DM |
1192 | * bus, and they might need to invoke the * KDBUS_CMD_FREE |
1193 | * ioctl on the fd when they are freed. */ | |
de1c301e LP |
1194 | } |
1195 | ||
718db961 LP |
1196 | static void bus_enter_closing(sd_bus *bus) { |
1197 | assert(bus); | |
1198 | ||
1199 | if (bus->state != BUS_OPENING && | |
1200 | bus->state != BUS_AUTHENTICATING && | |
1201 | bus->state != BUS_HELLO && | |
1202 | bus->state != BUS_RUNNING) | |
1203 | return; | |
1204 | ||
1205 | bus->state = BUS_CLOSING; | |
1206 | } | |
1207 | ||
d9f644e2 | 1208 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1209 | assert_return(bus, NULL); |
de1c301e | 1210 | |
e4ee6e5c | 1211 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1212 | |
de1c301e LP |
1213 | return bus; |
1214 | } | |
1215 | ||
d9f644e2 | 1216 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
5b1bc83f LP |
1217 | |
1218 | if (!bus) | |
1219 | return NULL; | |
de1c301e | 1220 | |
e4ee6e5c | 1221 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1222 | bus_free(bus); |
1223 | ||
1224 | return NULL; | |
1225 | } | |
1226 | ||
d9f644e2 | 1227 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1228 | |
1229 | assert_return(bus, -EINVAL); | |
1230 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1231 | |
f54514f3 | 1232 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1233 | } |
1234 | ||
d9f644e2 | 1235 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1236 | int r; |
1237 | ||
d6888822 LP |
1238 | assert_return(bus, -EINVAL); |
1239 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1240 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1241 | |
d728d708 | 1242 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1243 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1244 | return 0; |
1245 | ||
20902f3e | 1246 | r = bus_ensure_running(bus); |
d728d708 LP |
1247 | if (r < 0) |
1248 | return r; | |
de1c301e | 1249 | |
d728d708 LP |
1250 | return bus->can_fds; |
1251 | } | |
1252 | ||
1253 | return bus_type_is_valid(type); | |
de1c301e LP |
1254 | } |
1255 | ||
d9f644e2 | 1256 | _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1257 | int r; |
de1c301e | 1258 | |
d6888822 LP |
1259 | assert_return(bus, -EINVAL); |
1260 | assert_return(server_id, -EINVAL); | |
1261 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1262 | |
20902f3e | 1263 | r = bus_ensure_running(bus); |
d728d708 LP |
1264 | if (r < 0) |
1265 | return r; | |
de1c301e | 1266 | |
98178d39 | 1267 | *server_id = bus->server_id; |
d728d708 | 1268 | return 0; |
de1c301e LP |
1269 | } |
1270 | ||
7adc46fc LP |
1271 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { |
1272 | assert(b); | |
de1c301e LP |
1273 | assert(m); |
1274 | ||
89ffcd2a LP |
1275 | if (m->header->version > b->message_version) |
1276 | return -EPERM; | |
1277 | ||
aea93deb LP |
1278 | if (m->sealed) { |
1279 | /* If we copy the same message to multiple | |
1280 | * destinations, avoid using the same serial | |
1281 | * numbers. */ | |
1282 | b->serial = MAX(b->serial, BUS_MESSAGE_SERIAL(m)); | |
de1c301e | 1283 | return 0; |
aea93deb | 1284 | } |
de1c301e | 1285 | |
9a17484d | 1286 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1287 | } |
1288 | ||
7adc46fc LP |
1289 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1290 | assert(b); | |
1291 | assert(m); | |
1292 | ||
1293 | if (m->header->version > b->message_version) | |
1294 | return -EPERM; | |
1295 | ||
1296 | /* The bus specification says the serial number cannot be 0, | |
1297 | * hence let's fill something in for synthetic messages. Since | |
1298 | * synthetic messages might have a fake sender and we don't | |
1299 | * want to interfere with the real sender's serial numbers we | |
1300 | * pick a fixed, artifical one. We use (uint32_t) -1 rather | |
1301 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, | |
1302 | * even though kdbus can do 64bit. */ | |
1303 | ||
1304 | return bus_message_seal(m, 0xFFFFFFFFULL); | |
1305 | } | |
1306 | ||
718db961 | 1307 | static int bus_write_message(sd_bus *bus, sd_bus_message *message, size_t *idx) { |
718db961 LP |
1308 | assert(bus); |
1309 | assert(message); | |
1310 | ||
1311 | if (bus->is_kernel) | |
a43b9ca3 | 1312 | return bus_kernel_write_message(bus, message); |
718db961 | 1313 | else |
a43b9ca3 | 1314 | return bus_socket_write_message(bus, message, idx); |
718db961 LP |
1315 | } |
1316 | ||
de1c301e | 1317 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1318 | int r, ret = 0; |
de1c301e LP |
1319 | |
1320 | assert(bus); | |
89ffcd2a | 1321 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1322 | |
de1c301e LP |
1323 | while (bus->wqueue_size > 0) { |
1324 | ||
718db961 LP |
1325 | r = bus_write_message(bus, bus->wqueue[0], &bus->windex); |
1326 | if (r < 0) | |
de1c301e | 1327 | return r; |
718db961 | 1328 | else if (r == 0) |
e3017af9 LP |
1329 | /* Didn't do anything this time */ |
1330 | return ret; | |
6629161f | 1331 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1332 | /* Fully written. Let's drop the entry from |
1333 | * the queue. | |
1334 | * | |
1335 | * This isn't particularly optimized, but | |
1336 | * well, this is supposed to be our worst-case | |
1337 | * buffer only, and the socket buffer is | |
1338 | * supposed to be our primary buffer, and if | |
1339 | * it got full, then all bets are off | |
1340 | * anyway. */ | |
1341 | ||
1342 | sd_bus_message_unref(bus->wqueue[0]); | |
1343 | bus->wqueue_size --; | |
1344 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1345 | bus->windex = 0; | |
1346 | ||
e3017af9 | 1347 | ret = 1; |
de1c301e LP |
1348 | } |
1349 | } | |
1350 | ||
e3017af9 | 1351 | return ret; |
de1c301e LP |
1352 | } |
1353 | ||
7d22c717 LP |
1354 | static int bus_read_message(sd_bus *bus) { |
1355 | assert(bus); | |
1356 | ||
1357 | if (bus->is_kernel) | |
1358 | return bus_kernel_read_message(bus); | |
1359 | else | |
1360 | return bus_socket_read_message(bus); | |
1361 | } | |
1362 | ||
7adc46fc | 1363 | int bus_rqueue_make_room(sd_bus *bus) { |
7d22c717 LP |
1364 | sd_bus_message **q; |
1365 | unsigned x; | |
1366 | ||
7adc46fc | 1367 | x = bus->rqueue_size + 1; |
7d22c717 LP |
1368 | |
1369 | if (bus->rqueue_allocated >= x) | |
1370 | return 0; | |
1371 | ||
1372 | if (x > BUS_RQUEUE_MAX) | |
1373 | return -ENOBUFS; | |
1374 | ||
1375 | q = realloc(bus->rqueue, x * sizeof(sd_bus_message*)); | |
1376 | if (!q) | |
1377 | return -ENOMEM; | |
1378 | ||
1379 | bus->rqueue = q; | |
1380 | bus->rqueue_allocated = x; | |
1381 | ||
1382 | return 0; | |
1383 | } | |
1384 | ||
de1c301e | 1385 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { |
e3017af9 | 1386 | int r, ret = 0; |
de1c301e LP |
1387 | |
1388 | assert(bus); | |
1389 | assert(m); | |
89ffcd2a | 1390 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1391 | |
7d22c717 LP |
1392 | for (;;) { |
1393 | if (bus->rqueue_size > 0) { | |
1394 | /* Dispatch a queued message */ | |
de1c301e | 1395 | |
7d22c717 LP |
1396 | *m = bus->rqueue[0]; |
1397 | bus->rqueue_size --; | |
1398 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1399 | return 1; | |
1400 | } | |
de1c301e | 1401 | |
7d22c717 LP |
1402 | /* Try to read a new message */ |
1403 | r = bus_read_message(bus); | |
718db961 | 1404 | if (r < 0) |
e3017af9 | 1405 | return r; |
e3017af9 LP |
1406 | if (r == 0) |
1407 | return ret; | |
de1c301e | 1408 | |
2e8d788c | 1409 | ret = 1; |
7d22c717 | 1410 | } |
de1c301e LP |
1411 | } |
1412 | ||
d9f644e2 | 1413 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { |
de1c301e LP |
1414 | int r; |
1415 | ||
d6888822 LP |
1416 | assert_return(bus, -EINVAL); |
1417 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1418 | assert_return(m, -EINVAL); | |
1419 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1420 | |
1421 | if (m->n_fds > 0) { | |
1422 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1423 | if (r < 0) | |
1424 | return r; | |
1425 | if (r == 0) | |
1426 | return -ENOTSUP; | |
1427 | } | |
de1c301e | 1428 | |
29f6aadd LP |
1429 | /* If the serial number isn't kept, then we know that no reply |
1430 | * is expected */ | |
1431 | if (!serial && !m->sealed) | |
0461f8cd | 1432 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1433 | |
de1c301e LP |
1434 | r = bus_seal_message(bus, m); |
1435 | if (r < 0) | |
1436 | return r; | |
1437 | ||
5407f2de LP |
1438 | /* If this is a reply and no reply was requested, then let's |
1439 | * suppress this, if we can */ | |
1440 | if (m->dont_send && !serial) | |
7a37d625 | 1441 | return 1; |
5407f2de | 1442 | |
89ffcd2a | 1443 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1444 | size_t idx = 0; |
1445 | ||
718db961 | 1446 | r = bus_write_message(bus, m, &idx); |
32f46480 LP |
1447 | if (r < 0) { |
1448 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1449 | bus_enter_closing(bus); | |
1450 | ||
de1c301e | 1451 | return r; |
32f46480 | 1452 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1453 | /* Wasn't fully written. So let's remember how |
1454 | * much was written. Note that the first entry | |
1455 | * of the wqueue array is always allocated so | |
1456 | * that we always can remember how much was | |
1457 | * written. */ | |
1458 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1459 | bus->wqueue_size = 1; | |
1460 | bus->windex = idx; | |
1461 | } | |
1462 | } else { | |
1463 | sd_bus_message **q; | |
1464 | ||
1465 | /* Just append it to the queue. */ | |
1466 | ||
25220239 | 1467 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1468 | return -ENOBUFS; |
1469 | ||
1470 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1471 | if (!q) | |
1472 | return -ENOMEM; | |
1473 | ||
1474 | bus->wqueue = q; | |
1475 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1476 | } | |
1477 | ||
1478 | if (serial) | |
1479 | *serial = BUS_MESSAGE_SERIAL(m); | |
1480 | ||
7a37d625 | 1481 | return 1; |
de1c301e LP |
1482 | } |
1483 | ||
911121a7 LP |
1484 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *serial) { |
1485 | int r; | |
1486 | ||
1487 | assert_return(bus, -EINVAL); | |
1488 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1489 | assert_return(m, -EINVAL); | |
1490 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1491 | ||
1492 | if (!streq_ptr(m->destination, destination)) { | |
1493 | ||
1494 | if (!destination) | |
1495 | return -EEXIST; | |
1496 | ||
1497 | r = sd_bus_message_set_destination(m, destination); | |
1498 | if (r < 0) | |
1499 | return r; | |
1500 | } | |
1501 | ||
1502 | return sd_bus_send(bus, m, serial); | |
1503 | } | |
1504 | ||
de1c301e LP |
1505 | static usec_t calc_elapse(uint64_t usec) { |
1506 | if (usec == (uint64_t) -1) | |
1507 | return 0; | |
1508 | ||
1509 | if (usec == 0) | |
e3017af9 | 1510 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1511 | |
1512 | return now(CLOCK_MONOTONIC) + usec; | |
1513 | } | |
1514 | ||
e3017af9 LP |
1515 | static int timeout_compare(const void *a, const void *b) { |
1516 | const struct reply_callback *x = a, *y = b; | |
1517 | ||
1518 | if (x->timeout != 0 && y->timeout == 0) | |
1519 | return -1; | |
1520 | ||
1521 | if (x->timeout == 0 && y->timeout != 0) | |
1522 | return 1; | |
1523 | ||
1524 | if (x->timeout < y->timeout) | |
1525 | return -1; | |
1526 | ||
1527 | if (x->timeout > y->timeout) | |
1528 | return 1; | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
c49b30a2 | 1533 | _public_ int sd_bus_call_async( |
de1c301e LP |
1534 | sd_bus *bus, |
1535 | sd_bus_message *m, | |
52f3ba91 | 1536 | sd_bus_message_handler_t callback, |
de1c301e LP |
1537 | void *userdata, |
1538 | uint64_t usec, | |
1539 | uint64_t *serial) { | |
1540 | ||
1541 | struct reply_callback *c; | |
1542 | int r; | |
1543 | ||
d6888822 LP |
1544 | assert_return(bus, -EINVAL); |
1545 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1546 | assert_return(m, -EINVAL); | |
40ca29a1 | 1547 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1548 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1549 | assert_return(callback, -EINVAL); |
1550 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1551 | |
1552 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1553 | if (r < 0) | |
1554 | return r; | |
de1c301e | 1555 | |
e3017af9 LP |
1556 | if (usec != (uint64_t) -1) { |
1557 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1558 | if (r < 0) | |
1559 | return r; | |
1560 | } | |
1561 | ||
de1c301e LP |
1562 | r = bus_seal_message(bus, m); |
1563 | if (r < 0) | |
1564 | return r; | |
1565 | ||
eba8617e | 1566 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1567 | if (!c) |
1568 | return -ENOMEM; | |
1569 | ||
1570 | c->callback = callback; | |
1571 | c->userdata = userdata; | |
1572 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1573 | c->timeout = calc_elapse(usec); | |
1574 | ||
1575 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1576 | if (r < 0) { | |
1577 | free(c); | |
1578 | return r; | |
1579 | } | |
1580 | ||
e3017af9 LP |
1581 | if (c->timeout != 0) { |
1582 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1583 | if (r < 0) { | |
1584 | c->timeout = 0; | |
c49b30a2 | 1585 | sd_bus_call_async_cancel(bus, c->serial); |
e3017af9 LP |
1586 | return r; |
1587 | } | |
1588 | } | |
1589 | ||
de1c301e LP |
1590 | r = sd_bus_send(bus, m, serial); |
1591 | if (r < 0) { | |
c49b30a2 | 1592 | sd_bus_call_async_cancel(bus, c->serial); |
de1c301e LP |
1593 | return r; |
1594 | } | |
1595 | ||
1596 | return r; | |
1597 | } | |
1598 | ||
c49b30a2 | 1599 | _public_ int sd_bus_call_async_cancel(sd_bus *bus, uint64_t serial) { |
e3017af9 | 1600 | struct reply_callback *c; |
de1c301e | 1601 | |
d6888822 LP |
1602 | assert_return(bus, -EINVAL); |
1603 | assert_return(serial != 0, -EINVAL); | |
1604 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1605 | |
1606 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1607 | if (!c) | |
1608 | return 0; | |
1609 | ||
e3017af9 LP |
1610 | if (c->timeout != 0) |
1611 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1612 | ||
de1c301e LP |
1613 | free(c); |
1614 | return 1; | |
1615 | } | |
1616 | ||
20902f3e | 1617 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1618 | int r; |
1619 | ||
1620 | assert(bus); | |
1621 | ||
718db961 | 1622 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1623 | return -ENOTCONN; |
d728d708 LP |
1624 | if (bus->state == BUS_RUNNING) |
1625 | return 1; | |
89ffcd2a LP |
1626 | |
1627 | for (;;) { | |
1628 | r = sd_bus_process(bus, NULL); | |
1629 | if (r < 0) | |
1630 | return r; | |
d728d708 LP |
1631 | if (bus->state == BUS_RUNNING) |
1632 | return 1; | |
e3017af9 LP |
1633 | if (r > 0) |
1634 | continue; | |
89ffcd2a LP |
1635 | |
1636 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1637 | if (r < 0) | |
1638 | return r; | |
1639 | } | |
1640 | } | |
1641 | ||
c49b30a2 | 1642 | _public_ int sd_bus_call( |
de1c301e LP |
1643 | sd_bus *bus, |
1644 | sd_bus_message *m, | |
1645 | uint64_t usec, | |
1646 | sd_bus_error *error, | |
1647 | sd_bus_message **reply) { | |
1648 | ||
de1c301e LP |
1649 | usec_t timeout; |
1650 | uint64_t serial; | |
7d22c717 LP |
1651 | unsigned i; |
1652 | int r; | |
de1c301e | 1653 | |
d6888822 LP |
1654 | assert_return(bus, -EINVAL); |
1655 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1656 | assert_return(m, -EINVAL); | |
40ca29a1 | 1657 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1658 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1659 | assert_return(!bus_error_is_dirty(error), -EINVAL); |
1660 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1661 | |
20902f3e | 1662 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1663 | if (r < 0) |
1664 | return r; | |
de1c301e | 1665 | |
a43b9ca3 LP |
1666 | i = bus->rqueue_size; |
1667 | ||
de1c301e LP |
1668 | r = sd_bus_send(bus, m, &serial); |
1669 | if (r < 0) | |
1670 | return r; | |
1671 | ||
1672 | timeout = calc_elapse(usec); | |
1673 | ||
1674 | for (;;) { | |
1675 | usec_t left; | |
de1c301e | 1676 | |
7d22c717 LP |
1677 | while (i < bus->rqueue_size) { |
1678 | sd_bus_message *incoming = NULL; | |
1679 | ||
1680 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1681 | |
de1c301e LP |
1682 | if (incoming->reply_serial == serial) { |
1683 | /* Found a match! */ | |
1684 | ||
7d22c717 LP |
1685 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1686 | bus->rqueue_size--; | |
1687 | ||
40ca29a1 | 1688 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1689 | |
1690 | if (reply) | |
1691 | *reply = incoming; | |
1692 | else | |
1693 | sd_bus_message_unref(incoming); | |
1694 | ||
7a37d625 | 1695 | return 1; |
a43b9ca3 | 1696 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1697 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1698 | else |
1699 | r = -EIO; | |
de1c301e LP |
1700 | |
1701 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 1702 | return r; |
a8a07f89 LP |
1703 | |
1704 | } else if (incoming->header->serial == serial && | |
1705 | bus->unique_name && | |
1706 | incoming->sender && | |
1707 | streq(bus->unique_name, incoming->sender)) { | |
1708 | ||
7d22c717 LP |
1709 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1710 | bus->rqueue_size--; | |
1711 | ||
a8a07f89 LP |
1712 | /* Our own message? Somebody is trying |
1713 | * to send its own client a message, | |
1714 | * let's not dead-lock, let's fail | |
1715 | * immediately. */ | |
1716 | ||
1717 | sd_bus_message_unref(incoming); | |
1718 | return -ELOOP; | |
de1c301e LP |
1719 | } |
1720 | ||
de1c301e | 1721 | /* Try to read more, right-away */ |
7d22c717 | 1722 | i++; |
de1c301e | 1723 | } |
7d22c717 | 1724 | |
a43b9ca3 | 1725 | r = bus_read_message(bus); |
32f46480 LP |
1726 | if (r < 0) { |
1727 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1728 | bus_enter_closing(bus); | |
1729 | ||
a43b9ca3 | 1730 | return r; |
32f46480 | 1731 | } |
7d22c717 | 1732 | if (r > 0) |
e3017af9 | 1733 | continue; |
de1c301e LP |
1734 | |
1735 | if (timeout > 0) { | |
1736 | usec_t n; | |
1737 | ||
1738 | n = now(CLOCK_MONOTONIC); | |
1739 | if (n >= timeout) | |
1740 | return -ETIMEDOUT; | |
1741 | ||
1742 | left = timeout - n; | |
1743 | } else | |
1744 | left = (uint64_t) -1; | |
1745 | ||
e3017af9 | 1746 | r = bus_poll(bus, true, left); |
de1c301e LP |
1747 | if (r < 0) |
1748 | return r; | |
1749 | ||
1750 | r = dispatch_wqueue(bus); | |
32f46480 LP |
1751 | if (r < 0) { |
1752 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
1753 | bus_enter_closing(bus); | |
1754 | ||
de1c301e | 1755 | return r; |
32f46480 | 1756 | } |
de1c301e LP |
1757 | } |
1758 | } | |
1759 | ||
d9f644e2 | 1760 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1761 | |
1762 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1763 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1764 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1765 | |
e82c9509 | 1766 | return bus->input_fd; |
de1c301e LP |
1767 | } |
1768 | ||
d9f644e2 | 1769 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1770 | int flags = 0; |
1771 | ||
d6888822 | 1772 | assert_return(bus, -EINVAL); |
718db961 | 1773 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1774 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e LP |
1775 | |
1776 | if (bus->state == BUS_OPENING) | |
1777 | flags |= POLLOUT; | |
89ffcd2a LP |
1778 | else if (bus->state == BUS_AUTHENTICATING) { |
1779 | ||
2181a7f5 | 1780 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1781 | flags |= POLLOUT; |
1782 | ||
1783 | flags |= POLLIN; | |
1784 | ||
1785 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1786 | if (bus->rqueue_size <= 0) |
1787 | flags |= POLLIN; | |
1788 | if (bus->wqueue_size > 0) | |
1789 | flags |= POLLOUT; | |
1790 | } | |
1791 | ||
1792 | return flags; | |
1793 | } | |
1794 | ||
d9f644e2 | 1795 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
1796 | struct reply_callback *c; |
1797 | ||
d6888822 LP |
1798 | assert_return(bus, -EINVAL); |
1799 | assert_return(timeout_usec, -EINVAL); | |
718db961 | 1800 | assert_return(BUS_IS_OPEN(bus->state) || bus->state == BUS_CLOSING, -ENOTCONN); |
d6888822 | 1801 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 1802 | |
718db961 LP |
1803 | if (bus->state == BUS_CLOSING) { |
1804 | *timeout_usec = 0; | |
1805 | return 1; | |
1806 | } | |
1807 | ||
e3017af9 LP |
1808 | if (bus->state == BUS_AUTHENTICATING) { |
1809 | *timeout_usec = bus->auth_timeout; | |
1810 | return 1; | |
1811 | } | |
1812 | ||
adee69fa LP |
1813 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1814 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1815 | return 0; |
adee69fa | 1816 | } |
e3017af9 | 1817 | |
8efd6381 LP |
1818 | if (bus->rqueue_size > 0) { |
1819 | *timeout_usec = 0; | |
1820 | return 1; | |
1821 | } | |
1822 | ||
e3017af9 | 1823 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
1824 | if (!c) { |
1825 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1826 | return 0; |
adee69fa | 1827 | } |
e3017af9 LP |
1828 | |
1829 | *timeout_usec = c->timeout; | |
1830 | return 1; | |
1831 | } | |
1832 | ||
1833 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 1834 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 1835 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1836 | struct reply_callback *c; |
1837 | usec_t n; | |
1838 | int r; | |
1839 | ||
1840 | assert(bus); | |
1841 | ||
1842 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1843 | if (!c) | |
1844 | return 0; | |
1845 | ||
1846 | n = now(CLOCK_MONOTONIC); | |
1847 | if (c->timeout > n) | |
1848 | return 0; | |
1849 | ||
eb01ba5d LP |
1850 | r = bus_message_new_synthetic_error( |
1851 | bus, | |
1852 | c->serial, | |
14c24659 | 1853 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
1854 | &m); |
1855 | if (r < 0) | |
1856 | return r; | |
1857 | ||
34a2c9e8 LP |
1858 | m->sender = "org.freedesktop.DBus"; |
1859 | ||
7adc46fc | 1860 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
1861 | if (r < 0) |
1862 | return r; | |
1863 | ||
e3017af9 LP |
1864 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1865 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1866 | ||
718db961 LP |
1867 | bus->current = m; |
1868 | bus->iteration_counter ++; | |
1869 | ||
ebcf1f97 LP |
1870 | r = c->callback(bus, m, c->userdata, &error_buffer); |
1871 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
e3017af9 LP |
1872 | free(c); |
1873 | ||
718db961 LP |
1874 | bus->current = NULL; |
1875 | ||
ebcf1f97 | 1876 | return r; |
e3017af9 LP |
1877 | } |
1878 | ||
9d373862 LP |
1879 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1880 | assert(bus); | |
1881 | assert(m); | |
1882 | ||
1883 | if (bus->state != BUS_HELLO) | |
1884 | return 0; | |
1885 | ||
1886 | /* Let's make sure the first message on the bus is the HELLO | |
1887 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1888 | * here (we leave that to the usual handling), we just verify |
1889 | * we don't let any earlier msg through. */ | |
9d373862 | 1890 | |
40ca29a1 LP |
1891 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1892 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
1893 | return -EIO; |
1894 | ||
1895 | if (m->reply_serial != bus->hello_serial) | |
1896 | return -EIO; | |
1897 | ||
1898 | return 0; | |
1899 | } | |
1900 | ||
a652755d | 1901 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
ebcf1f97 | 1902 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
1903 | struct reply_callback *c; |
1904 | int r; | |
1905 | ||
1906 | assert(bus); | |
1907 | assert(m); | |
1908 | ||
40ca29a1 LP |
1909 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1910 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
1911 | return 0; |
1912 | ||
1913 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1914 | if (!c) | |
1915 | return 0; | |
1916 | ||
1917 | if (c->timeout != 0) | |
1918 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1919 | ||
88fe224c LP |
1920 | r = sd_bus_message_rewind(m, true); |
1921 | if (r < 0) | |
1922 | return r; | |
1923 | ||
ebcf1f97 LP |
1924 | r = c->callback(bus, m, c->userdata, &error_buffer); |
1925 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
a652755d LP |
1926 | free(c); |
1927 | ||
ebcf1f97 | 1928 | return r; |
a652755d LP |
1929 | } |
1930 | ||
1931 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 1932 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
1933 | struct filter_callback *l; |
1934 | int r; | |
1935 | ||
392d5b37 LP |
1936 | assert(bus); |
1937 | assert(m); | |
1938 | ||
7286037f LP |
1939 | do { |
1940 | bus->filter_callbacks_modified = false; | |
1941 | ||
1942 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1943 | ||
1944 | if (bus->filter_callbacks_modified) | |
1945 | break; | |
1946 | ||
1947 | /* Don't run this more than once per iteration */ | |
1948 | if (l->last_iteration == bus->iteration_counter) | |
1949 | continue; | |
1950 | ||
1951 | l->last_iteration = bus->iteration_counter; | |
1952 | ||
88fe224c LP |
1953 | r = sd_bus_message_rewind(m, true); |
1954 | if (r < 0) | |
1955 | return r; | |
1956 | ||
969987ea | 1957 | r = l->callback(bus, m, l->userdata, &error_buffer); |
ebcf1f97 | 1958 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
1959 | if (r != 0) |
1960 | return r; | |
1961 | ||
1962 | } | |
1963 | ||
1964 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1965 | |
1966 | return 0; | |
1967 | } | |
1968 | ||
392d5b37 | 1969 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1970 | int r; |
1971 | ||
392d5b37 LP |
1972 | assert(bus); |
1973 | assert(m); | |
1974 | ||
7286037f LP |
1975 | do { |
1976 | bus->match_callbacks_modified = false; | |
1977 | ||
eb01ba5d | 1978 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1979 | if (r != 0) |
1980 | return r; | |
1981 | ||
1982 | } while (bus->match_callbacks_modified); | |
1983 | ||
1984 | return 0; | |
392d5b37 LP |
1985 | } |
1986 | ||
b9bf7e2b LP |
1987 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1988 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1989 | int r; | |
1990 | ||
1991 | assert(bus); | |
1992 | assert(m); | |
1993 | ||
40ca29a1 | 1994 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
1995 | return 0; |
1996 | ||
1997 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1998 | return 0; | |
1999 | ||
0461f8cd | 2000 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2001 | return 1; |
2002 | ||
2003 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2004 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2005 | else if (streq_ptr(m->member, "GetMachineId")) { |
2006 | sd_id128_t id; | |
2007 | char sid[33]; | |
2008 | ||
2009 | r = sd_id128_get_machine(&id); | |
2010 | if (r < 0) | |
2011 | return r; | |
2012 | ||
df2d202e | 2013 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2014 | if (r < 0) |
2015 | return r; | |
2016 | ||
2017 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2018 | } else { | |
29ddb38f | 2019 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2020 | m, &reply, |
40ca29a1 | 2021 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2022 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2023 | } |
2024 | ||
2025 | if (r < 0) | |
2026 | return r; | |
2027 | ||
2028 | r = sd_bus_send(bus, reply, NULL); | |
2029 | if (r < 0) | |
2030 | return r; | |
2031 | ||
2032 | return 1; | |
2033 | } | |
2034 | ||
992c052c | 2035 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2036 | int r; |
2037 | ||
2038 | assert(bus); | |
992c052c | 2039 | assert(m); |
e3017af9 | 2040 | |
affff0b6 | 2041 | bus->current = m; |
992c052c | 2042 | bus->iteration_counter++; |
e3017af9 | 2043 | |
40ca29a1 LP |
2044 | log_debug("Got message sender=%s object=%s interface=%s member=%s", |
2045 | strna(sd_bus_message_get_sender(m)), | |
2046 | strna(sd_bus_message_get_path(m)), | |
2047 | strna(sd_bus_message_get_interface(m)), | |
2048 | strna(sd_bus_message_get_member(m))); | |
2049 | ||
992c052c LP |
2050 | r = process_hello(bus, m); |
2051 | if (r != 0) | |
affff0b6 | 2052 | goto finish; |
a652755d | 2053 | |
992c052c LP |
2054 | r = process_reply(bus, m); |
2055 | if (r != 0) | |
affff0b6 | 2056 | goto finish; |
e3017af9 | 2057 | |
992c052c LP |
2058 | r = process_filter(bus, m); |
2059 | if (r != 0) | |
affff0b6 | 2060 | goto finish; |
a652755d | 2061 | |
992c052c LP |
2062 | r = process_match(bus, m); |
2063 | if (r != 0) | |
affff0b6 | 2064 | goto finish; |
a652755d | 2065 | |
992c052c LP |
2066 | r = process_builtin(bus, m); |
2067 | if (r != 0) | |
affff0b6 LP |
2068 | goto finish; |
2069 | ||
2070 | r = bus_process_object(bus, m); | |
a652755d | 2071 | |
affff0b6 LP |
2072 | finish: |
2073 | bus->current = NULL; | |
2074 | return r; | |
29ddb38f | 2075 | } |
88fe224c | 2076 | |
992c052c LP |
2077 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
2078 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 2079 | int r; |
a652755d | 2080 | |
29ddb38f | 2081 | assert(bus); |
992c052c | 2082 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2083 | |
992c052c LP |
2084 | r = process_timeout(bus); |
2085 | if (r != 0) | |
2086 | goto null_message; | |
7286037f | 2087 | |
992c052c LP |
2088 | r = dispatch_wqueue(bus); |
2089 | if (r != 0) | |
2090 | goto null_message; | |
7286037f | 2091 | |
992c052c LP |
2092 | r = dispatch_rqueue(bus, &m); |
2093 | if (r < 0) | |
2094 | return r; | |
2095 | if (!m) | |
2096 | goto null_message; | |
7286037f | 2097 | |
992c052c LP |
2098 | r = process_message(bus, m); |
2099 | if (r != 0) | |
2100 | goto null_message; | |
7286037f | 2101 | |
992c052c LP |
2102 | if (ret) { |
2103 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2104 | if (r < 0) |
2105 | return r; | |
e3017af9 | 2106 | |
992c052c LP |
2107 | *ret = m; |
2108 | m = NULL; | |
2109 | return 1; | |
2110 | } | |
a652755d | 2111 | |
40ca29a1 | 2112 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2113 | |
992c052c | 2114 | r = sd_bus_reply_method_errorf( |
df2d202e | 2115 | m, |
40ca29a1 | 2116 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2117 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2118 | if (r < 0) |
2119 | return r; | |
2120 | } | |
e3017af9 | 2121 | |
992c052c | 2122 | return 1; |
0a72c2bd | 2123 | |
992c052c LP |
2124 | null_message: |
2125 | if (r >= 0 && ret) | |
2126 | *ret = NULL; | |
0a72c2bd | 2127 | |
992c052c | 2128 | return r; |
29ddb38f | 2129 | } |
0a72c2bd | 2130 | |
718db961 LP |
2131 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2132 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2133 | struct reply_callback *c; | |
2134 | int r; | |
2135 | ||
2136 | assert(bus); | |
2137 | assert(bus->state == BUS_CLOSING); | |
2138 | ||
2139 | c = hashmap_first(bus->reply_callbacks); | |
2140 | if (c) { | |
ebcf1f97 LP |
2141 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2142 | ||
718db961 LP |
2143 | /* First, fail all outstanding method calls */ |
2144 | r = bus_message_new_synthetic_error( | |
2145 | bus, | |
2146 | c->serial, | |
14c24659 | 2147 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2148 | &m); |
2149 | if (r < 0) | |
2150 | return r; | |
2151 | ||
7adc46fc | 2152 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2153 | if (r < 0) |
2154 | return r; | |
2155 | ||
2156 | if (c->timeout != 0) | |
2157 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2158 | ||
2159 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
2160 | ||
2161 | bus->current = m; | |
2162 | bus->iteration_counter++; | |
2163 | ||
ebcf1f97 LP |
2164 | r = c->callback(bus, m, c->userdata, &error_buffer); |
2165 | r = bus_maybe_reply_error(m, r, &error_buffer); | |
718db961 LP |
2166 | free(c); |
2167 | ||
718db961 LP |
2168 | goto finish; |
2169 | } | |
2170 | ||
2171 | /* Then, synthesize a Disconnected message */ | |
2172 | r = sd_bus_message_new_signal( | |
2173 | bus, | |
2174 | "/org/freedesktop/DBus/Local", | |
2175 | "org.freedesktop.DBus.Local", | |
2176 | "Disconnected", | |
2177 | &m); | |
2178 | if (r < 0) | |
2179 | return r; | |
2180 | ||
34a2c9e8 LP |
2181 | m->sender = "org.freedesktop.DBus.Local"; |
2182 | ||
7adc46fc | 2183 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2184 | if (r < 0) |
2185 | return r; | |
2186 | ||
2187 | sd_bus_close(bus); | |
2188 | ||
2189 | bus->current = m; | |
2190 | bus->iteration_counter++; | |
2191 | ||
2192 | r = process_filter(bus, m); | |
2193 | if (r != 0) | |
2194 | goto finish; | |
2195 | ||
2196 | r = process_match(bus, m); | |
2197 | if (r != 0) | |
2198 | goto finish; | |
2199 | ||
2200 | if (ret) { | |
2201 | *ret = m; | |
2202 | m = NULL; | |
2203 | } | |
2204 | ||
2205 | r = 1; | |
2206 | ||
2207 | finish: | |
2208 | bus->current = NULL; | |
2209 | return r; | |
2210 | } | |
2211 | ||
d9f644e2 | 2212 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 2213 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2214 | int r; |
0a72c2bd | 2215 | |
992c052c LP |
2216 | /* Returns 0 when we didn't do anything. This should cause the |
2217 | * caller to invoke sd_bus_wait() before returning the next | |
2218 | * time. Returns > 0 when we did something, which possibly | |
2219 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2220 | |
d6888822 LP |
2221 | assert_return(bus, -EINVAL); |
2222 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2223 | |
992c052c | 2224 | /* We don't allow recursively invoking sd_bus_process(). */ |
718db961 | 2225 | assert_return(!bus->current, -EBUSY); |
0a72c2bd | 2226 | |
992c052c | 2227 | switch (bus->state) { |
0a72c2bd | 2228 | |
992c052c LP |
2229 | case BUS_UNSET: |
2230 | case BUS_CLOSED: | |
2231 | return -ENOTCONN; | |
0a72c2bd | 2232 | |
992c052c LP |
2233 | case BUS_OPENING: |
2234 | r = bus_socket_process_opening(bus); | |
32f46480 | 2235 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2236 | bus_enter_closing(bus); |
2237 | r = 1; | |
2238 | } else if (r < 0) | |
29ddb38f | 2239 | return r; |
992c052c LP |
2240 | if (ret) |
2241 | *ret = NULL; | |
a652755d LP |
2242 | return r; |
2243 | ||
992c052c | 2244 | case BUS_AUTHENTICATING: |
992c052c | 2245 | r = bus_socket_process_authenticating(bus); |
32f46480 | 2246 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2247 | bus_enter_closing(bus); |
2248 | r = 1; | |
2249 | } else if (r < 0) | |
29ddb38f | 2250 | return r; |
718db961 | 2251 | |
992c052c LP |
2252 | if (ret) |
2253 | *ret = NULL; | |
718db961 | 2254 | |
992c052c | 2255 | return r; |
a652755d | 2256 | |
992c052c LP |
2257 | case BUS_RUNNING: |
2258 | case BUS_HELLO: | |
992c052c | 2259 | r = process_running(bus, ret); |
32f46480 | 2260 | if (r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2261 | bus_enter_closing(bus); |
2262 | r = 1; | |
2263 | ||
2264 | if (ret) | |
2265 | *ret = NULL; | |
2266 | } | |
43a43f50 | 2267 | |
43a43f50 | 2268 | return r; |
718db961 LP |
2269 | |
2270 | case BUS_CLOSING: | |
2271 | return process_closing(bus, ret); | |
992c052c | 2272 | } |
43a43f50 | 2273 | |
992c052c | 2274 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2275 | } |
2276 | ||
992c052c LP |
2277 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2278 | struct pollfd p[2] = {}; | |
2279 | int r, e, n; | |
2280 | struct timespec ts; | |
8efd6381 | 2281 | usec_t m = (usec_t) -1; |
adcdb374 LP |
2282 | |
2283 | assert(bus); | |
718db961 LP |
2284 | |
2285 | if (bus->state == BUS_CLOSING) | |
2286 | return 1; | |
2287 | ||
d6888822 | 2288 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 2289 | |
992c052c LP |
2290 | e = sd_bus_get_events(bus); |
2291 | if (e < 0) | |
2292 | return e; | |
adcdb374 | 2293 | |
992c052c | 2294 | if (need_more) |
8efd6381 LP |
2295 | /* The caller really needs some more data, he doesn't |
2296 | * care about what's already read, or any timeouts | |
2297 | * except its own.*/ | |
992c052c | 2298 | e |= POLLIN; |
992c052c | 2299 | else { |
8efd6381 LP |
2300 | usec_t until; |
2301 | /* The caller wants to process if there's something to | |
2302 | * process, but doesn't care otherwise */ | |
2303 | ||
2304 | r = sd_bus_get_timeout(bus, &until); | |
2305 | if (r < 0) | |
2306 | return r; | |
2307 | if (r > 0) { | |
2308 | usec_t nw; | |
2309 | nw = now(CLOCK_MONOTONIC); | |
2310 | m = until > nw ? until - nw : 0; | |
2311 | } | |
992c052c | 2312 | } |
adcdb374 | 2313 | |
992c052c LP |
2314 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2315 | m = timeout_usec; | |
adcdb374 | 2316 | |
992c052c LP |
2317 | p[0].fd = bus->input_fd; |
2318 | if (bus->output_fd == bus->input_fd) { | |
2319 | p[0].events = e; | |
2320 | n = 1; | |
2321 | } else { | |
2322 | p[0].events = e & POLLIN; | |
2323 | p[1].fd = bus->output_fd; | |
2324 | p[1].events = e & POLLOUT; | |
2325 | n = 2; | |
adcdb374 LP |
2326 | } |
2327 | ||
992c052c | 2328 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2329 | if (r < 0) |
992c052c | 2330 | return -errno; |
adcdb374 | 2331 | |
992c052c | 2332 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2333 | } |
2334 | ||
d9f644e2 | 2335 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2336 | |
d6888822 | 2337 | assert_return(bus, -EINVAL); |
d6888822 | 2338 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2339 | |
718db961 LP |
2340 | if (bus->state == BUS_CLOSING) |
2341 | return 0; | |
2342 | ||
2343 | assert_return(BUS_IS_OPEN(bus->state) , -ENOTCONN); | |
2344 | ||
992c052c LP |
2345 | if (bus->rqueue_size > 0) |
2346 | return 0; | |
9db76355 | 2347 | |
992c052c LP |
2348 | return bus_poll(bus, false, timeout_usec); |
2349 | } | |
9db76355 | 2350 | |
d9f644e2 | 2351 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2352 | int r; |
9db76355 | 2353 | |
d6888822 | 2354 | assert_return(bus, -EINVAL); |
d6888822 | 2355 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2356 | |
718db961 LP |
2357 | if (bus->state == BUS_CLOSING) |
2358 | return 0; | |
2359 | ||
2360 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2361 | ||
992c052c LP |
2362 | r = bus_ensure_running(bus); |
2363 | if (r < 0) | |
2364 | return r; | |
9db76355 | 2365 | |
992c052c LP |
2366 | if (bus->wqueue_size <= 0) |
2367 | return 0; | |
9db76355 | 2368 | |
992c052c LP |
2369 | for (;;) { |
2370 | r = dispatch_wqueue(bus); | |
32f46480 LP |
2371 | if (r < 0) { |
2372 | if (r == -EPIPE || r == -ENOTCONN || r == -ESHUTDOWN) | |
2373 | bus_enter_closing(bus); | |
2374 | ||
9db76355 | 2375 | return r; |
32f46480 | 2376 | } |
9db76355 | 2377 | |
992c052c LP |
2378 | if (bus->wqueue_size <= 0) |
2379 | return 0; | |
9db76355 | 2380 | |
992c052c | 2381 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2382 | if (r < 0) |
2383 | return r; | |
9db76355 | 2384 | } |
9db76355 LP |
2385 | } |
2386 | ||
d9f644e2 ZJS |
2387 | _public_ int sd_bus_add_filter(sd_bus *bus, |
2388 | sd_bus_message_handler_t callback, | |
2389 | void *userdata) { | |
2390 | ||
992c052c | 2391 | struct filter_callback *f; |
de1c301e | 2392 | |
d6888822 LP |
2393 | assert_return(bus, -EINVAL); |
2394 | assert_return(callback, -EINVAL); | |
2395 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2396 | |
992c052c LP |
2397 | f = new0(struct filter_callback, 1); |
2398 | if (!f) | |
29ddb38f | 2399 | return -ENOMEM; |
992c052c LP |
2400 | f->callback = callback; |
2401 | f->userdata = userdata; | |
29ddb38f | 2402 | |
992c052c | 2403 | bus->filter_callbacks_modified = true; |
71fda00f | 2404 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2405 | return 0; |
2406 | } | |
a652755d | 2407 | |
d9f644e2 ZJS |
2408 | _public_ int sd_bus_remove_filter(sd_bus *bus, |
2409 | sd_bus_message_handler_t callback, | |
2410 | void *userdata) { | |
2411 | ||
992c052c | 2412 | struct filter_callback *f; |
a652755d | 2413 | |
d6888822 LP |
2414 | assert_return(bus, -EINVAL); |
2415 | assert_return(callback, -EINVAL); | |
2416 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2417 | |
992c052c LP |
2418 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2419 | if (f->callback == callback && f->userdata == userdata) { | |
2420 | bus->filter_callbacks_modified = true; | |
71fda00f | 2421 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2422 | free(f); |
2423 | return 1; | |
29ddb38f LP |
2424 | } |
2425 | } | |
2426 | ||
992c052c | 2427 | return 0; |
a652755d | 2428 | } |
392d5b37 | 2429 | |
d9f644e2 ZJS |
2430 | _public_ int sd_bus_add_match(sd_bus *bus, |
2431 | const char *match, | |
2432 | sd_bus_message_handler_t callback, | |
2433 | void *userdata) { | |
2434 | ||
992c052c LP |
2435 | struct bus_match_component *components = NULL; |
2436 | unsigned n_components = 0; | |
2437 | uint64_t cookie = 0; | |
2438 | int r = 0; | |
392d5b37 | 2439 | |
d6888822 LP |
2440 | assert_return(bus, -EINVAL); |
2441 | assert_return(match, -EINVAL); | |
2442 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2443 | |
992c052c LP |
2444 | r = bus_match_parse(match, &components, &n_components); |
2445 | if (r < 0) | |
2446 | goto finish; | |
29ddb38f | 2447 | |
992c052c LP |
2448 | if (bus->bus_client) { |
2449 | cookie = ++bus->match_cookie; | |
29ddb38f | 2450 | |
992c052c LP |
2451 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2452 | if (r < 0) | |
2453 | goto finish; | |
392d5b37 LP |
2454 | } |
2455 | ||
992c052c LP |
2456 | bus->match_callbacks_modified = true; |
2457 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2458 | if (r < 0) { |
992c052c LP |
2459 | if (bus->bus_client) |
2460 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2461 | } |
917b5dc7 | 2462 | |
992c052c LP |
2463 | finish: |
2464 | bus_match_parse_free(components, n_components); | |
2465 | return r; | |
917b5dc7 LP |
2466 | } |
2467 | ||
d9f644e2 ZJS |
2468 | _public_ int sd_bus_remove_match(sd_bus *bus, |
2469 | const char *match, | |
2470 | sd_bus_message_handler_t callback, | |
2471 | void *userdata) { | |
2472 | ||
992c052c LP |
2473 | struct bus_match_component *components = NULL; |
2474 | unsigned n_components = 0; | |
2475 | int r = 0, q = 0; | |
2476 | uint64_t cookie = 0; | |
917b5dc7 | 2477 | |
d6888822 LP |
2478 | assert_return(bus, -EINVAL); |
2479 | assert_return(match, -EINVAL); | |
2480 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2481 | |
992c052c | 2482 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2483 | if (r < 0) |
2484 | return r; | |
f10dda3b | 2485 | |
992c052c LP |
2486 | bus->match_callbacks_modified = true; |
2487 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2488 | |
992c052c LP |
2489 | if (bus->bus_client) |
2490 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2491 | |
992c052c | 2492 | bus_match_parse_free(components, n_components); |
f10dda3b | 2493 | |
992c052c | 2494 | return r < 0 ? r : q; |
f10dda3b LP |
2495 | } |
2496 | ||
992c052c LP |
2497 | bool bus_pid_changed(sd_bus *bus) { |
2498 | assert(bus); | |
f10dda3b | 2499 | |
992c052c LP |
2500 | /* We don't support people creating a bus connection and |
2501 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2502 | |
992c052c | 2503 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2504 | } |
40ca29a1 LP |
2505 | |
2506 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2507 | sd_bus *bus = userdata; |
40ca29a1 LP |
2508 | int r; |
2509 | ||
2510 | assert(bus); | |
2511 | ||
2512 | r = sd_bus_process(bus, NULL); | |
2513 | if (r < 0) | |
2514 | return r; | |
2515 | ||
2516 | return 1; | |
2517 | } | |
2518 | ||
2519 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2520 | sd_bus *bus = userdata; |
40ca29a1 LP |
2521 | int r; |
2522 | ||
2523 | assert(bus); | |
2524 | ||
2525 | r = sd_bus_process(bus, NULL); | |
2526 | if (r < 0) | |
2527 | return r; | |
2528 | ||
2529 | return 1; | |
2530 | } | |
2531 | ||
2532 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2533 | sd_bus *bus = userdata; | |
2534 | int r, e; | |
2535 | usec_t until; | |
2536 | ||
2537 | assert(s); | |
2538 | assert(bus); | |
2539 | ||
2540 | e = sd_bus_get_events(bus); | |
2541 | if (e < 0) | |
2542 | return e; | |
2543 | ||
2544 | if (bus->output_fd != bus->input_fd) { | |
2545 | ||
2546 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2547 | if (r < 0) | |
2548 | return r; | |
2549 | ||
2550 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2551 | if (r < 0) | |
2552 | return r; | |
2553 | } else { | |
2554 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2555 | if (r < 0) | |
2556 | return r; | |
2557 | } | |
2558 | ||
2559 | r = sd_bus_get_timeout(bus, &until); | |
2560 | if (r < 0) | |
2561 | return r; | |
2562 | if (r > 0) { | |
2563 | int j; | |
2564 | ||
2565 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2566 | if (j < 0) | |
2567 | return j; | |
2568 | } | |
2569 | ||
2570 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2571 | if (r < 0) | |
2572 | return r; | |
2573 | ||
2574 | return 1; | |
2575 | } | |
2576 | ||
abc5fe72 LP |
2577 | static int quit_callback(sd_event_source *event, void *userdata) { |
2578 | sd_bus *bus = userdata; | |
2579 | ||
2580 | assert(event); | |
2581 | ||
2582 | sd_bus_flush(bus); | |
2583 | ||
2584 | return 1; | |
2585 | } | |
2586 | ||
d9f644e2 | 2587 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
2588 | int r; |
2589 | ||
2590 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
2591 | assert_return(!bus->event, -EBUSY); |
2592 | ||
2593 | assert(!bus->input_io_event_source); | |
2594 | assert(!bus->output_io_event_source); | |
2595 | assert(!bus->time_event_source); | |
2596 | ||
76b54375 LP |
2597 | if (event) |
2598 | bus->event = sd_event_ref(event); | |
2599 | else { | |
2600 | r = sd_event_default(&bus->event); | |
2601 | if (r < 0) | |
2602 | return r; | |
2603 | } | |
40ca29a1 | 2604 | |
76b54375 | 2605 | r = sd_event_add_io(bus->event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); |
40ca29a1 LP |
2606 | if (r < 0) |
2607 | goto fail; | |
2608 | ||
2609 | r = sd_event_source_set_priority(bus->input_io_event_source, priority); | |
2610 | if (r < 0) | |
2611 | goto fail; | |
2612 | ||
2613 | if (bus->output_fd != bus->input_fd) { | |
76b54375 | 2614 | r = sd_event_add_io(bus->event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); |
40ca29a1 LP |
2615 | if (r < 0) |
2616 | goto fail; | |
2617 | ||
2618 | r = sd_event_source_set_priority(bus->output_io_event_source, priority); | |
2619 | if (r < 0) | |
2620 | goto fail; | |
2621 | } | |
2622 | ||
2623 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2624 | if (r < 0) | |
2625 | goto fail; | |
2626 | ||
76b54375 | 2627 | r = sd_event_add_monotonic(bus->event, 0, 0, time_callback, bus, &bus->time_event_source); |
40ca29a1 LP |
2628 | if (r < 0) |
2629 | goto fail; | |
2630 | ||
2631 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2632 | if (r < 0) | |
2633 | goto fail; | |
2634 | ||
76b54375 | 2635 | r = sd_event_add_quit(bus->event, quit_callback, bus, &bus->quit_event_source); |
abc5fe72 LP |
2636 | if (r < 0) |
2637 | goto fail; | |
2638 | ||
40ca29a1 LP |
2639 | return 0; |
2640 | ||
2641 | fail: | |
2642 | sd_bus_detach_event(bus); | |
2643 | return r; | |
2644 | } | |
2645 | ||
d9f644e2 | 2646 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 2647 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
2648 | |
2649 | if (!bus->event) | |
2650 | return 0; | |
40ca29a1 | 2651 | |
86befb40 LP |
2652 | if (bus->input_io_event_source) { |
2653 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2654 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); |
86befb40 | 2655 | } |
40ca29a1 | 2656 | |
86befb40 LP |
2657 | if (bus->output_io_event_source) { |
2658 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2659 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); |
86befb40 | 2660 | } |
40ca29a1 | 2661 | |
86befb40 LP |
2662 | if (bus->time_event_source) { |
2663 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 2664 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 2665 | } |
40ca29a1 | 2666 | |
86befb40 LP |
2667 | if (bus->quit_event_source) { |
2668 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 2669 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 2670 | } |
abc5fe72 | 2671 | |
40ca29a1 LP |
2672 | if (bus->event) |
2673 | bus->event = sd_event_unref(bus->event); | |
2674 | ||
a82cafb9 | 2675 | return 1; |
40ca29a1 | 2676 | } |
affff0b6 | 2677 | |
2be44176 LP |
2678 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
2679 | assert_return(bus, NULL); | |
2680 | ||
2681 | return bus->event; | |
2682 | } | |
2683 | ||
76b54375 | 2684 | _public_ sd_bus_message* sd_bus_get_current(sd_bus *bus) { |
affff0b6 LP |
2685 | assert_return(bus, NULL); |
2686 | ||
2687 | return bus->current; | |
2688 | } | |
76b54375 LP |
2689 | |
2690 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { | |
2691 | sd_bus *b = NULL; | |
2692 | int r; | |
2693 | ||
2694 | assert(bus_open); | |
2695 | assert(default_bus); | |
2696 | ||
2697 | if (!ret) | |
2698 | return !!*default_bus; | |
2699 | ||
2700 | if (*default_bus) { | |
2701 | *ret = sd_bus_ref(*default_bus); | |
2702 | return 0; | |
2703 | } | |
2704 | ||
2705 | r = bus_open(&b); | |
2706 | if (r < 0) | |
2707 | return r; | |
2708 | ||
2709 | b->default_bus_ptr = default_bus; | |
2710 | b->tid = gettid(); | |
2711 | *default_bus = b; | |
2712 | ||
2713 | *ret = b; | |
2714 | return 1; | |
2715 | } | |
2716 | ||
2717 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
2718 | static __thread sd_bus *default_system_bus = NULL; | |
2719 | ||
2720 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
2721 | } | |
2722 | ||
2723 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
2724 | static __thread sd_bus *default_user_bus = NULL; | |
2725 | ||
2726 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
2727 | } | |
2728 | ||
2729 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { | |
2730 | assert_return(b, -EINVAL); | |
2731 | assert_return(tid, -EINVAL); | |
2732 | assert_return(!bus_pid_changed(b), -ECHILD); | |
2733 | ||
2734 | if (b->tid != 0) { | |
2735 | *tid = b->tid; | |
2736 | return 0; | |
2737 | } | |
2738 | ||
2739 | if (b->event) | |
2740 | return sd_event_get_tid(b->event, tid); | |
2741 | ||
2742 | return -ENXIO; | |
2743 | } | |
28383ba1 LP |
2744 | |
2745 | _public_ char *sd_bus_label_escape(const char *s) { | |
2746 | char *r, *t; | |
2747 | const char *f; | |
2748 | ||
2749 | assert_return(s, NULL); | |
2750 | ||
2751 | /* Escapes all chars that D-Bus' object path cannot deal | |
2752 | * with. Can be reversed with bus_path_unescape(). We special | |
2753 | * case the empty string. */ | |
2754 | ||
2755 | if (*s == 0) | |
2756 | return strdup("_"); | |
2757 | ||
2758 | r = new(char, strlen(s)*3 + 1); | |
2759 | if (!r) | |
2760 | return NULL; | |
2761 | ||
2762 | for (f = s, t = r; *f; f++) { | |
2763 | ||
2764 | /* Escape everything that is not a-zA-Z0-9. We also | |
2765 | * escape 0-9 if it's the first character */ | |
2766 | ||
2767 | if (!(*f >= 'A' && *f <= 'Z') && | |
2768 | !(*f >= 'a' && *f <= 'z') && | |
2769 | !(f > s && *f >= '0' && *f <= '9')) { | |
2770 | *(t++) = '_'; | |
2771 | *(t++) = hexchar(*f >> 4); | |
2772 | *(t++) = hexchar(*f); | |
2773 | } else | |
2774 | *(t++) = *f; | |
2775 | } | |
2776 | ||
2777 | *t = 0; | |
2778 | ||
2779 | return r; | |
2780 | } | |
2781 | ||
2782 | _public_ char *sd_bus_label_unescape(const char *f) { | |
2783 | char *r, *t; | |
2784 | ||
2785 | assert_return(f, NULL); | |
2786 | ||
2787 | /* Special case for the empty string */ | |
2788 | if (streq(f, "_")) | |
2789 | return strdup(""); | |
2790 | ||
2791 | r = new(char, strlen(f) + 1); | |
2792 | if (!r) | |
2793 | return NULL; | |
2794 | ||
2795 | for (t = r; *f; f++) { | |
2796 | ||
2797 | if (*f == '_') { | |
2798 | int a, b; | |
2799 | ||
2800 | if ((a = unhexchar(f[1])) < 0 || | |
2801 | (b = unhexchar(f[2])) < 0) { | |
2802 | /* Invalid escape code, let's take it literal then */ | |
2803 | *(t++) = '_'; | |
2804 | } else { | |
2805 | *(t++) = (char) ((a << 4) | b); | |
2806 | f += 2; | |
2807 | } | |
2808 | } else | |
2809 | *(t++) = *f; | |
2810 | } | |
2811 | ||
2812 | *t = 0; | |
2813 | ||
2814 | return r; | |
2815 | } | |
5b12334d LP |
2816 | |
2817 | _public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { | |
2818 | sd_bus_creds *c; | |
2819 | pid_t pid = 0; | |
2820 | int r; | |
2821 | ||
2822 | assert_return(bus, -EINVAL); | |
95c4fe82 | 2823 | assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP); |
5b12334d LP |
2824 | assert_return(ret, -EINVAL); |
2825 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2826 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2827 | assert_return(!bus->is_kernel, -ENOTSUP); | |
2828 | ||
2829 | if (!bus->ucred_valid && !isempty(bus->label)) | |
2830 | return -ENODATA; | |
2831 | ||
2832 | c = bus_creds_new(); | |
2833 | if (!c) | |
2834 | return -ENOMEM; | |
2835 | ||
2836 | if (bus->ucred_valid) { | |
2837 | pid = c->pid = bus->ucred.pid; | |
2838 | c->uid = bus->ucred.uid; | |
2839 | c->gid = bus->ucred.gid; | |
2840 | ||
3310dfd5 | 2841 | c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask; |
5b12334d LP |
2842 | } |
2843 | ||
2844 | if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) { | |
2845 | c->label = strdup(bus->label); | |
2846 | if (!c->label) { | |
2847 | sd_bus_creds_unref(c); | |
2848 | return -ENOMEM; | |
2849 | } | |
2850 | ||
3310dfd5 | 2851 | c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
5b12334d LP |
2852 | } |
2853 | ||
2854 | r = bus_creds_add_more(c, mask, pid, 0); | |
2855 | if (r < 0) | |
2856 | return r; | |
2857 | ||
2858 | *ret = c; | |
2859 | return 0; | |
2860 | } |