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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" |
de1c301e | 49 | |
e3017af9 LP |
50 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
51 | ||
f54514f3 LP |
52 | static void bus_close_fds(sd_bus *b) { |
53 | assert(b); | |
54 | ||
55 | if (b->input_fd >= 0) | |
56 | close_nointr_nofail(b->input_fd); | |
57 | ||
58 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
59 | close_nointr_nofail(b->output_fd); | |
60 | ||
61 | b->input_fd = b->output_fd = -1; | |
62 | } | |
63 | ||
29ddb38f LP |
64 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
65 | struct node_callback *c; | |
66 | struct node_vtable *v; | |
67 | struct node_enumerator *e; | |
68 | ||
69 | assert(b); | |
70 | ||
71 | if (!n) | |
72 | return; | |
73 | ||
74 | while (n->child) | |
75 | bus_node_destroy(b, n->child); | |
76 | ||
77 | while ((c = n->callbacks)) { | |
71fda00f | 78 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
79 | free(c); |
80 | } | |
81 | ||
82 | while ((v = n->vtables)) { | |
71fda00f | 83 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
84 | free(v->interface); |
85 | free(v); | |
86 | } | |
87 | ||
88 | while ((e = n->enumerators)) { | |
71fda00f | 89 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
90 | free(e); |
91 | } | |
92 | ||
93 | if (n->parent) | |
71fda00f | 94 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
95 | |
96 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
97 | free(n->path); | |
98 | free(n); | |
99 | } | |
100 | ||
de1c301e LP |
101 | static void bus_free(sd_bus *b) { |
102 | struct filter_callback *f; | |
29ddb38f | 103 | struct node *n; |
89ffcd2a | 104 | unsigned i; |
de1c301e LP |
105 | |
106 | assert(b); | |
107 | ||
40ca29a1 LP |
108 | sd_bus_detach_event(b); |
109 | ||
f54514f3 | 110 | bus_close_fds(b); |
de1c301e | 111 | |
63edf05e LP |
112 | if (b->kdbus_buffer) |
113 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
114 | ||
de1c301e | 115 | free(b->rbuffer); |
89ffcd2a | 116 | free(b->unique_name); |
2181a7f5 | 117 | free(b->auth_buffer); |
89ffcd2a | 118 | free(b->address); |
e9a967f9 | 119 | free(b->kernel); |
89ffcd2a | 120 | |
2fd9ae2e LP |
121 | free(b->exec_path); |
122 | strv_free(b->exec_argv); | |
123 | ||
2c93b4ef LP |
124 | close_many(b->fds, b->n_fds); |
125 | free(b->fds); | |
126 | ||
89ffcd2a LP |
127 | for (i = 0; i < b->rqueue_size; i++) |
128 | sd_bus_message_unref(b->rqueue[i]); | |
de1c301e | 129 | free(b->rqueue); |
89ffcd2a LP |
130 | |
131 | for (i = 0; i < b->wqueue_size; i++) | |
132 | sd_bus_message_unref(b->wqueue[i]); | |
de1c301e | 133 | free(b->wqueue); |
de1c301e LP |
134 | |
135 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 136 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
137 | |
138 | while ((f = b->filter_callbacks)) { | |
71fda00f | 139 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
140 | free(f); |
141 | } | |
142 | ||
392d5b37 LP |
143 | bus_match_free(&b->match_callbacks); |
144 | ||
29ddb38f LP |
145 | hashmap_free_free(b->vtable_methods); |
146 | hashmap_free_free(b->vtable_properties); | |
147 | ||
148 | while ((n = hashmap_first(b->nodes))) | |
149 | bus_node_destroy(b, n); | |
150 | ||
151 | hashmap_free(b->nodes); | |
152 | ||
bc7fd8cd LP |
153 | bus_kernel_flush_memfd(b); |
154 | ||
45fbe937 LP |
155 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
156 | ||
de1c301e LP |
157 | free(b); |
158 | } | |
159 | ||
021a1e78 | 160 | int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
161 | sd_bus *r; |
162 | ||
d6888822 | 163 | assert_return(ret, -EINVAL); |
021a1e78 | 164 | |
de1c301e LP |
165 | r = new0(sd_bus, 1); |
166 | if (!r) | |
021a1e78 | 167 | return -ENOMEM; |
de1c301e | 168 | |
e4ee6e5c | 169 | r->n_ref = REFCNT_INIT; |
e82c9509 | 170 | r->input_fd = r->output_fd = -1; |
de1c301e | 171 | r->message_version = 1; |
264ad849 | 172 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d5a2b9a6 | 173 | r->original_pid = getpid(); |
de1c301e | 174 | |
45fbe937 LP |
175 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
176 | ||
de1c301e LP |
177 | /* We guarantee that wqueue always has space for at least one |
178 | * entry */ | |
179 | r->wqueue = new(sd_bus_message*, 1); | |
180 | if (!r->wqueue) { | |
181 | free(r); | |
021a1e78 | 182 | return -ENOMEM; |
de1c301e LP |
183 | } |
184 | ||
021a1e78 LP |
185 | *ret = r; |
186 | return 0; | |
187 | } | |
188 | ||
189 | int sd_bus_set_address(sd_bus *bus, const char *address) { | |
190 | char *a; | |
191 | ||
d6888822 LP |
192 | assert_return(bus, -EINVAL); |
193 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
194 | assert_return(address, -EINVAL); | |
195 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
196 | |
197 | a = strdup(address); | |
198 | if (!a) | |
199 | return -ENOMEM; | |
200 | ||
201 | free(bus->address); | |
202 | bus->address = a; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
e82c9509 | 207 | int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
208 | assert_return(bus, -EINVAL); |
209 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
210 | assert_return(input_fd >= 0, -EINVAL); | |
211 | assert_return(output_fd >= 0, -EINVAL); | |
212 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 213 | |
e82c9509 LP |
214 | bus->input_fd = input_fd; |
215 | bus->output_fd = output_fd; | |
021a1e78 LP |
216 | return 0; |
217 | } | |
218 | ||
2fd9ae2e LP |
219 | int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
220 | char *p, **a; | |
221 | ||
d6888822 LP |
222 | assert_return(bus, -EINVAL); |
223 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
224 | assert_return(path, -EINVAL); | |
225 | assert_return(!strv_isempty(argv), -EINVAL); | |
226 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
227 | |
228 | p = strdup(path); | |
229 | if (!p) | |
230 | return -ENOMEM; | |
231 | ||
232 | a = strv_copy(argv); | |
233 | if (!a) { | |
234 | free(p); | |
235 | return -ENOMEM; | |
236 | } | |
237 | ||
238 | free(bus->exec_path); | |
239 | strv_free(bus->exec_argv); | |
240 | ||
241 | bus->exec_path = p; | |
242 | bus->exec_argv = a; | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
94bbf1ba | 247 | int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
248 | assert_return(bus, -EINVAL); |
249 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
250 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 251 | |
94bbf1ba | 252 | bus->bus_client = !!b; |
021a1e78 LP |
253 | return 0; |
254 | } | |
255 | ||
264ad849 | 256 | int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
257 | assert_return(bus, -EINVAL); |
258 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
259 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 260 | |
264ad849 LP |
261 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
262 | return 0; | |
263 | } | |
264 | ||
265 | int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) { | |
d6888822 LP |
266 | assert_return(bus, -EINVAL); |
267 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
268 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
269 | |
270 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_COMM, b); | |
271 | return 0; | |
272 | } | |
273 | ||
274 | int sd_bus_negotiate_attach_exe(sd_bus *bus, int b) { | |
d6888822 LP |
275 | assert_return(bus, -EINVAL); |
276 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
277 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
278 | |
279 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_EXE, b); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | int sd_bus_negotiate_attach_cmdline(sd_bus *bus, int b) { | |
d6888822 LP |
284 | assert_return(bus, -EINVAL); |
285 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
286 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
287 | |
288 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CMDLINE, b); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | int sd_bus_negotiate_attach_cgroup(sd_bus *bus, int b) { | |
d6888822 LP |
293 | assert_return(bus, -EINVAL); |
294 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
295 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
296 | |
297 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CGROUP, b); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | int sd_bus_negotiate_attach_caps(sd_bus *bus, int b) { | |
d6888822 LP |
302 | assert_return(bus, -EINVAL); |
303 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
304 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
305 | |
306 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CAPS, b); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | int sd_bus_negotiate_attach_selinux_context(sd_bus *bus, int b) { | |
d6888822 LP |
311 | assert_return(bus, -EINVAL); |
312 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
313 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
314 | |
315 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_SECLABEL, b); | |
316 | return 0; | |
317 | } | |
318 | ||
319 | int sd_bus_negotiate_attach_audit(sd_bus *bus, int b) { | |
d6888822 LP |
320 | assert_return(bus, -EINVAL); |
321 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
322 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
323 | |
324 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_AUDIT, b); | |
021a1e78 LP |
325 | return 0; |
326 | } | |
de1c301e | 327 | |
98178d39 | 328 | int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
329 | assert_return(bus, -EINVAL); |
330 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
331 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
332 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
333 | |
334 | bus->is_server = !!b; | |
98178d39 | 335 | bus->server_id = server_id; |
2181a7f5 LP |
336 | return 0; |
337 | } | |
338 | ||
339 | int sd_bus_set_anonymous(sd_bus *bus, int b) { | |
d6888822 LP |
340 | assert_return(bus, -EINVAL); |
341 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
342 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
343 | |
344 | bus->anonymous_auth = !!b; | |
345 | return 0; | |
346 | } | |
347 | ||
eb01ba5d | 348 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
349 | const char *s; |
350 | int r; | |
351 | ||
352 | assert(bus); | |
021a1e78 | 353 | assert(bus->state == BUS_HELLO); |
de1c301e LP |
354 | assert(reply); |
355 | ||
40ca29a1 | 356 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
357 | if (r < 0) |
358 | return r; | |
40ca29a1 LP |
359 | if (r > 0) |
360 | return -r; | |
eb01ba5d | 361 | |
de1c301e LP |
362 | r = sd_bus_message_read(reply, "s", &s); |
363 | if (r < 0) | |
364 | return r; | |
365 | ||
dafb7591 LP |
366 | if (!service_name_is_valid(s) || s[0] != ':') |
367 | return -EBADMSG; | |
368 | ||
de1c301e LP |
369 | bus->unique_name = strdup(s); |
370 | if (!bus->unique_name) | |
371 | return -ENOMEM; | |
372 | ||
dafb7591 LP |
373 | bus->state = BUS_RUNNING; |
374 | ||
de1c301e LP |
375 | return 1; |
376 | } | |
377 | ||
378 | static int bus_send_hello(sd_bus *bus) { | |
379 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
380 | int r; | |
381 | ||
382 | assert(bus); | |
383 | ||
6629161f | 384 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
385 | return 0; |
386 | ||
de1c301e LP |
387 | r = sd_bus_message_new_method_call( |
388 | bus, | |
389 | "org.freedesktop.DBus", | |
390 | "/", | |
391 | "org.freedesktop.DBus", | |
392 | "Hello", | |
393 | &m); | |
394 | if (r < 0) | |
395 | return r; | |
396 | ||
9d373862 | 397 | return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
398 | } |
399 | ||
a7e3212d | 400 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
401 | assert(bus); |
402 | ||
f08838da | 403 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 404 | bus->state = BUS_HELLO; |
e3017af9 | 405 | return 1; |
de1c301e LP |
406 | } |
407 | ||
408 | bus->state = BUS_RUNNING; | |
e3017af9 | 409 | return 1; |
de1c301e LP |
410 | } |
411 | ||
412 | static int parse_address_key(const char **p, const char *key, char **value) { | |
413 | size_t l, n = 0; | |
414 | const char *a; | |
415 | char *r = NULL; | |
416 | ||
417 | assert(p); | |
418 | assert(*p); | |
de1c301e LP |
419 | assert(value); |
420 | ||
2fd9ae2e LP |
421 | if (key) { |
422 | l = strlen(key); | |
423 | if (strncmp(*p, key, l) != 0) | |
424 | return 0; | |
de1c301e | 425 | |
2fd9ae2e LP |
426 | if ((*p)[l] != '=') |
427 | return 0; | |
de1c301e | 428 | |
2fd9ae2e LP |
429 | if (*value) |
430 | return -EINVAL; | |
de1c301e | 431 | |
2fd9ae2e LP |
432 | a = *p + l + 1; |
433 | } else | |
434 | a = *p; | |
435 | ||
436 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
437 | char c, *t; |
438 | ||
439 | if (*a == '%') { | |
440 | int x, y; | |
441 | ||
442 | x = unhexchar(a[1]); | |
443 | if (x < 0) { | |
444 | free(r); | |
445 | return x; | |
446 | } | |
447 | ||
448 | y = unhexchar(a[2]); | |
449 | if (y < 0) { | |
450 | free(r); | |
451 | return y; | |
452 | } | |
453 | ||
de1c301e | 454 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
455 | a += 3; |
456 | } else { | |
de1c301e | 457 | c = *a; |
89ffcd2a LP |
458 | a++; |
459 | } | |
de1c301e | 460 | |
89ffcd2a | 461 | t = realloc(r, n + 2); |
de1c301e LP |
462 | if (!t) { |
463 | free(r); | |
464 | return -ENOMEM; | |
465 | } | |
466 | ||
467 | r = t; | |
468 | r[n++] = c; | |
469 | } | |
470 | ||
89ffcd2a LP |
471 | if (!r) { |
472 | r = strdup(""); | |
473 | if (!r) | |
474 | return -ENOMEM; | |
475 | } else | |
476 | r[n] = 0; | |
477 | ||
478 | if (*a == ',') | |
479 | a++; | |
480 | ||
de1c301e | 481 | *p = a; |
2fd9ae2e LP |
482 | |
483 | free(*value); | |
de1c301e | 484 | *value = r; |
2fd9ae2e | 485 | |
de1c301e LP |
486 | return 1; |
487 | } | |
488 | ||
489 | static void skip_address_key(const char **p) { | |
490 | assert(p); | |
491 | assert(*p); | |
492 | ||
89ffcd2a LP |
493 | *p += strcspn(*p, ","); |
494 | ||
495 | if (**p == ',') | |
496 | (*p) ++; | |
de1c301e LP |
497 | } |
498 | ||
2fd9ae2e LP |
499 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
500 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
501 | size_t l; | |
de1c301e LP |
502 | int r; |
503 | ||
504 | assert(b); | |
2fd9ae2e LP |
505 | assert(p); |
506 | assert(*p); | |
507 | assert(guid); | |
de1c301e | 508 | |
2fd9ae2e LP |
509 | while (**p != 0 && **p != ';') { |
510 | r = parse_address_key(p, "guid", guid); | |
511 | if (r < 0) | |
512 | return r; | |
513 | else if (r > 0) | |
514 | continue; | |
de1c301e | 515 | |
2fd9ae2e LP |
516 | r = parse_address_key(p, "path", &path); |
517 | if (r < 0) | |
518 | return r; | |
519 | else if (r > 0) | |
520 | continue; | |
de1c301e | 521 | |
2fd9ae2e LP |
522 | r = parse_address_key(p, "abstract", &abstract); |
523 | if (r < 0) | |
524 | return r; | |
525 | else if (r > 0) | |
526 | continue; | |
de1c301e | 527 | |
2fd9ae2e LP |
528 | skip_address_key(p); |
529 | } | |
de1c301e | 530 | |
2fd9ae2e LP |
531 | if (!path && !abstract) |
532 | return -EINVAL; | |
de1c301e | 533 | |
2fd9ae2e LP |
534 | if (path && abstract) |
535 | return -EINVAL; | |
536 | ||
537 | if (path) { | |
538 | l = strlen(path); | |
539 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
540 | return -E2BIG; | |
de1c301e | 541 | |
2fd9ae2e LP |
542 | b->sockaddr.un.sun_family = AF_UNIX; |
543 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
544 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
545 | } else if (abstract) { | |
546 | l = strlen(abstract); | |
547 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
548 | return -E2BIG; | |
549 | ||
550 | b->sockaddr.un.sun_family = AF_UNIX; | |
551 | b->sockaddr.un.sun_path[0] = 0; | |
552 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
553 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
554 | } | |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
559 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
560 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 561 | int r; |
b92bea5d ZJS |
562 | struct addrinfo *result, hints = { |
563 | .ai_socktype = SOCK_STREAM, | |
564 | .ai_flags = AI_ADDRCONFIG, | |
565 | }; | |
2fd9ae2e LP |
566 | |
567 | assert(b); | |
568 | assert(p); | |
569 | assert(*p); | |
570 | assert(guid); | |
571 | ||
572 | while (**p != 0 && **p != ';') { | |
573 | r = parse_address_key(p, "guid", guid); | |
574 | if (r < 0) | |
575 | return r; | |
576 | else if (r > 0) | |
577 | continue; | |
578 | ||
579 | r = parse_address_key(p, "host", &host); | |
580 | if (r < 0) | |
581 | return r; | |
582 | else if (r > 0) | |
583 | continue; | |
584 | ||
585 | r = parse_address_key(p, "port", &port); | |
586 | if (r < 0) | |
587 | return r; | |
588 | else if (r > 0) | |
589 | continue; | |
590 | ||
591 | r = parse_address_key(p, "family", &family); | |
592 | if (r < 0) | |
593 | return r; | |
594 | else if (r > 0) | |
595 | continue; | |
596 | ||
597 | skip_address_key(p); | |
598 | } | |
599 | ||
600 | if (!host || !port) | |
601 | return -EINVAL; | |
602 | ||
2fd9ae2e LP |
603 | if (family) { |
604 | if (streq(family, "ipv4")) | |
605 | hints.ai_family = AF_INET; | |
606 | else if (streq(family, "ipv6")) | |
607 | hints.ai_family = AF_INET6; | |
608 | else | |
609 | return -EINVAL; | |
610 | } | |
611 | ||
612 | r = getaddrinfo(host, port, &hints, &result); | |
613 | if (r == EAI_SYSTEM) | |
614 | return -errno; | |
615 | else if (r != 0) | |
616 | return -EADDRNOTAVAIL; | |
617 | ||
618 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
619 | b->sockaddr_size = result->ai_addrlen; | |
620 | ||
621 | freeaddrinfo(result); | |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
626 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
627 | char *path = NULL; | |
628 | unsigned n_argv = 0, j; | |
629 | char **argv = NULL; | |
630 | int r; | |
631 | ||
632 | assert(b); | |
633 | assert(p); | |
634 | assert(*p); | |
635 | assert(guid); | |
636 | ||
637 | while (**p != 0 && **p != ';') { | |
638 | r = parse_address_key(p, "guid", guid); | |
639 | if (r < 0) | |
640 | goto fail; | |
641 | else if (r > 0) | |
642 | continue; | |
643 | ||
644 | r = parse_address_key(p, "path", &path); | |
645 | if (r < 0) | |
646 | goto fail; | |
647 | else if (r > 0) | |
648 | continue; | |
649 | ||
650 | if (startswith(*p, "argv")) { | |
651 | unsigned ul; | |
652 | ||
653 | errno = 0; | |
654 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 655 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
656 | r = -EINVAL; |
657 | goto fail; | |
658 | } | |
659 | ||
660 | (*p) ++; | |
661 | ||
662 | if (ul >= n_argv) { | |
663 | char **x; | |
664 | ||
665 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
666 | if (!x) { | |
667 | r = -ENOMEM; | |
668 | goto fail; | |
669 | } | |
670 | ||
671 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
672 | ||
673 | argv = x; | |
674 | n_argv = ul + 1; | |
675 | } | |
676 | ||
677 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 678 | if (r < 0) |
2fd9ae2e | 679 | goto fail; |
de1c301e | 680 | |
2fd9ae2e | 681 | continue; |
de1c301e LP |
682 | } |
683 | ||
2fd9ae2e LP |
684 | skip_address_key(p); |
685 | } | |
de1c301e | 686 | |
5a0f6033 LP |
687 | if (!path) { |
688 | r = -EINVAL; | |
2fd9ae2e | 689 | goto fail; |
5a0f6033 | 690 | } |
de1c301e | 691 | |
2fd9ae2e LP |
692 | /* Make sure there are no holes in the array, with the |
693 | * exception of argv[0] */ | |
694 | for (j = 1; j < n_argv; j++) | |
695 | if (!argv[j]) { | |
696 | r = -EINVAL; | |
697 | goto fail; | |
698 | } | |
699 | ||
700 | if (argv && argv[0] == NULL) { | |
701 | argv[0] = strdup(path); | |
702 | if (!argv[0]) { | |
703 | r = -ENOMEM; | |
704 | goto fail; | |
705 | } | |
706 | } | |
de1c301e | 707 | |
2fd9ae2e LP |
708 | b->exec_path = path; |
709 | b->exec_argv = argv; | |
710 | return 0; | |
de1c301e | 711 | |
2fd9ae2e LP |
712 | fail: |
713 | for (j = 0; j < n_argv; j++) | |
714 | free(argv[j]); | |
715 | ||
716 | free(argv); | |
717 | free(path); | |
718 | return r; | |
719 | } | |
720 | ||
6629161f LP |
721 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
722 | _cleanup_free_ char *path = NULL; | |
723 | int r; | |
724 | ||
725 | assert(b); | |
726 | assert(p); | |
727 | assert(*p); | |
728 | assert(guid); | |
729 | ||
730 | while (**p != 0 && **p != ';') { | |
731 | r = parse_address_key(p, "guid", guid); | |
732 | if (r < 0) | |
733 | return r; | |
734 | else if (r > 0) | |
735 | continue; | |
736 | ||
737 | r = parse_address_key(p, "path", &path); | |
738 | if (r < 0) | |
739 | return r; | |
740 | else if (r > 0) | |
741 | continue; | |
742 | ||
743 | skip_address_key(p); | |
744 | } | |
745 | ||
746 | if (!path) | |
747 | return -EINVAL; | |
748 | ||
749 | free(b->kernel); | |
750 | b->kernel = path; | |
751 | path = NULL; | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
2fd9ae2e LP |
756 | static void bus_reset_parsed_address(sd_bus *b) { |
757 | assert(b); | |
758 | ||
759 | zero(b->sockaddr); | |
760 | b->sockaddr_size = 0; | |
761 | strv_free(b->exec_argv); | |
762 | free(b->exec_path); | |
763 | b->exec_path = NULL; | |
764 | b->exec_argv = NULL; | |
98178d39 | 765 | b->server_id = SD_ID128_NULL; |
6629161f LP |
766 | free(b->kernel); |
767 | b->kernel = NULL; | |
2fd9ae2e LP |
768 | } |
769 | ||
770 | static int bus_parse_next_address(sd_bus *b) { | |
771 | _cleanup_free_ char *guid = NULL; | |
772 | const char *a; | |
773 | int r; | |
774 | ||
775 | assert(b); | |
776 | ||
777 | if (!b->address) | |
778 | return 0; | |
779 | if (b->address[b->address_index] == 0) | |
780 | return 0; | |
781 | ||
782 | bus_reset_parsed_address(b); | |
783 | ||
784 | a = b->address + b->address_index; | |
de1c301e | 785 | |
2fd9ae2e | 786 | while (*a != 0) { |
de1c301e | 787 | |
2fd9ae2e LP |
788 | if (*a == ';') { |
789 | a++; | |
790 | continue; | |
de1c301e LP |
791 | } |
792 | ||
2fd9ae2e LP |
793 | if (startswith(a, "unix:")) { |
794 | a += 5; | |
de1c301e | 795 | |
2fd9ae2e | 796 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
797 | if (r < 0) |
798 | return r; | |
2fd9ae2e | 799 | break; |
de1c301e | 800 | |
2fd9ae2e | 801 | } else if (startswith(a, "tcp:")) { |
de1c301e | 802 | |
2fd9ae2e LP |
803 | a += 4; |
804 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
805 | if (r < 0) |
806 | return r; | |
de1c301e | 807 | |
2fd9ae2e LP |
808 | break; |
809 | ||
810 | } else if (startswith(a, "unixexec:")) { | |
811 | ||
812 | a += 9; | |
813 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
814 | if (r < 0) |
815 | return r; | |
de1c301e | 816 | |
2fd9ae2e | 817 | break; |
de1c301e | 818 | |
6629161f LP |
819 | } else if (startswith(a, "kernel:")) { |
820 | ||
821 | a += 7; | |
822 | r = parse_kernel_address(b, &a, &guid); | |
823 | if (r < 0) | |
824 | return r; | |
825 | ||
826 | break; | |
de1c301e LP |
827 | } |
828 | ||
2fd9ae2e LP |
829 | a = strchr(a, ';'); |
830 | if (!a) | |
831 | return 0; | |
de1c301e LP |
832 | } |
833 | ||
834 | if (guid) { | |
98178d39 | 835 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
836 | if (r < 0) |
837 | return r; | |
838 | } | |
839 | ||
2fd9ae2e | 840 | b->address_index = a - b->address; |
de1c301e LP |
841 | return 1; |
842 | } | |
843 | ||
a7e3212d | 844 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
845 | int r; |
846 | ||
847 | assert(b); | |
848 | ||
849 | for (;;) { | |
e82c9509 | 850 | sd_bus_close(b); |
2fd9ae2e LP |
851 | |
852 | if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
a7e3212d LP |
853 | |
854 | r = bus_socket_connect(b); | |
2fd9ae2e LP |
855 | if (r >= 0) |
856 | return r; | |
857 | ||
858 | b->last_connect_error = -r; | |
859 | ||
860 | } else if (b->exec_path) { | |
861 | ||
a7e3212d | 862 | r = bus_socket_exec(b); |
2fd9ae2e LP |
863 | if (r >= 0) |
864 | return r; | |
865 | ||
6629161f LP |
866 | b->last_connect_error = -r; |
867 | } else if (b->kernel) { | |
868 | ||
869 | r = bus_kernel_connect(b); | |
870 | if (r >= 0) | |
871 | return r; | |
872 | ||
2fd9ae2e LP |
873 | b->last_connect_error = -r; |
874 | } | |
875 | ||
876 | r = bus_parse_next_address(b); | |
877 | if (r < 0) | |
878 | return r; | |
879 | if (r == 0) | |
880 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
881 | } |
882 | } | |
883 | ||
a7e3212d LP |
884 | int bus_next_address(sd_bus *b) { |
885 | assert(b); | |
886 | ||
887 | bus_reset_parsed_address(b); | |
888 | return bus_start_address(b); | |
889 | } | |
890 | ||
021a1e78 | 891 | static int bus_start_fd(sd_bus *b) { |
6629161f | 892 | struct stat st; |
021a1e78 LP |
893 | int r; |
894 | ||
895 | assert(b); | |
e82c9509 LP |
896 | assert(b->input_fd >= 0); |
897 | assert(b->output_fd >= 0); | |
021a1e78 | 898 | |
e82c9509 | 899 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
900 | if (r < 0) |
901 | return r; | |
902 | ||
e82c9509 | 903 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
904 | if (r < 0) |
905 | return r; | |
906 | ||
e82c9509 LP |
907 | if (b->input_fd != b->output_fd) { |
908 | r = fd_nonblock(b->output_fd, true); | |
909 | if (r < 0) | |
910 | return r; | |
911 | ||
912 | r = fd_cloexec(b->output_fd, true); | |
913 | if (r < 0) | |
914 | return r; | |
915 | } | |
916 | ||
6629161f LP |
917 | if (fstat(b->input_fd, &st) < 0) |
918 | return -errno; | |
919 | ||
920 | if (S_ISCHR(b->input_fd)) | |
921 | return bus_kernel_take_fd(b); | |
922 | else | |
923 | return bus_socket_take_fd(b); | |
021a1e78 LP |
924 | } |
925 | ||
926 | int sd_bus_start(sd_bus *bus) { | |
927 | int r; | |
928 | ||
d6888822 LP |
929 | assert_return(bus, -EINVAL); |
930 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
931 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
932 | |
933 | bus->state = BUS_OPENING; | |
934 | ||
2181a7f5 LP |
935 | if (bus->is_server && bus->bus_client) |
936 | return -EINVAL; | |
937 | ||
e82c9509 | 938 | if (bus->input_fd >= 0) |
021a1e78 | 939 | r = bus_start_fd(bus); |
6629161f | 940 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel) |
a7e3212d | 941 | r = bus_start_address(bus); |
021a1e78 LP |
942 | else |
943 | return -EINVAL; | |
944 | ||
945 | if (r < 0) | |
946 | return r; | |
947 | ||
948 | return bus_send_hello(bus); | |
949 | } | |
950 | ||
de1c301e LP |
951 | int sd_bus_open_system(sd_bus **ret) { |
952 | const char *e; | |
953 | sd_bus *b; | |
954 | int r; | |
955 | ||
d6888822 | 956 | assert_return(ret, -EINVAL); |
de1c301e | 957 | |
021a1e78 LP |
958 | r = sd_bus_new(&b); |
959 | if (r < 0) | |
960 | return r; | |
961 | ||
6c03089c | 962 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
de1c301e | 963 | if (e) { |
021a1e78 | 964 | r = sd_bus_set_address(b, e); |
de1c301e | 965 | if (r < 0) |
021a1e78 | 966 | goto fail; |
89ffcd2a | 967 | } else { |
89ffcd2a LP |
968 | b->sockaddr.un.sun_family = AF_UNIX; |
969 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
970 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 971 | } |
de1c301e | 972 | |
94bbf1ba | 973 | b->bus_client = true; |
021a1e78 LP |
974 | |
975 | r = sd_bus_start(b); | |
976 | if (r < 0) | |
977 | goto fail; | |
de1c301e LP |
978 | |
979 | *ret = b; | |
980 | return 0; | |
021a1e78 LP |
981 | |
982 | fail: | |
983 | bus_free(b); | |
984 | return r; | |
de1c301e LP |
985 | } |
986 | ||
987 | int sd_bus_open_user(sd_bus **ret) { | |
988 | const char *e; | |
989 | sd_bus *b; | |
990 | size_t l; | |
991 | int r; | |
992 | ||
d6888822 | 993 | assert_return(ret, -EINVAL); |
de1c301e | 994 | |
021a1e78 LP |
995 | r = sd_bus_new(&b); |
996 | if (r < 0) | |
997 | return r; | |
998 | ||
6c03089c | 999 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1000 | if (e) { |
021a1e78 | 1001 | r = sd_bus_set_address(b, e); |
de1c301e | 1002 | if (r < 0) |
021a1e78 | 1003 | goto fail; |
89ffcd2a | 1004 | } else { |
6c03089c | 1005 | e = secure_getenv("XDG_RUNTIME_DIR"); |
021a1e78 LP |
1006 | if (!e) { |
1007 | r = -ENOENT; | |
1008 | goto fail; | |
1009 | } | |
de1c301e | 1010 | |
89ffcd2a | 1011 | l = strlen(e); |
021a1e78 LP |
1012 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
1013 | r = -E2BIG; | |
1014 | goto fail; | |
1015 | } | |
de1c301e | 1016 | |
89ffcd2a LP |
1017 | b->sockaddr.un.sun_family = AF_UNIX; |
1018 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
1019 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
1020 | } |
1021 | ||
94bbf1ba | 1022 | b->bus_client = true; |
de1c301e | 1023 | |
021a1e78 | 1024 | r = sd_bus_start(b); |
2571ead1 LP |
1025 | if (r < 0) |
1026 | goto fail; | |
de1c301e LP |
1027 | |
1028 | *ret = b; | |
1029 | return 0; | |
2571ead1 LP |
1030 | |
1031 | fail: | |
021a1e78 | 1032 | bus_free(b); |
2571ead1 | 1033 | return r; |
de1c301e LP |
1034 | } |
1035 | ||
0f8bd8de LP |
1036 | int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
1037 | _cleanup_free_ char *e = NULL; | |
1038 | char *p = NULL; | |
1039 | sd_bus *bus; | |
1040 | int r; | |
1041 | ||
1042 | assert_return(host, -EINVAL); | |
1043 | assert_return(ret, -EINVAL); | |
1044 | ||
1045 | e = bus_address_escape(host); | |
1046 | if (!e) | |
1047 | return -ENOMEM; | |
1048 | ||
1049 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1050 | if (!p) | |
1051 | return -ENOMEM; | |
1052 | ||
1053 | r = sd_bus_new(&bus); | |
1054 | if (r < 0) { | |
1055 | free(p); | |
1056 | return r; | |
1057 | } | |
1058 | ||
1059 | bus->address = p; | |
1060 | bus->bus_client = true; | |
1061 | ||
1062 | r = sd_bus_start(bus); | |
1063 | if (r < 0) { | |
1064 | bus_free(bus); | |
1065 | return r; | |
1066 | } | |
1067 | ||
1068 | *ret = bus; | |
1069 | return 0; | |
1070 | } | |
1071 | ||
de1c301e LP |
1072 | void sd_bus_close(sd_bus *bus) { |
1073 | if (!bus) | |
1074 | return; | |
d5a2b9a6 LP |
1075 | if (bus->state == BUS_CLOSED) |
1076 | return; | |
1077 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1078 | return; |
1079 | ||
1080 | bus->state = BUS_CLOSED; | |
e82c9509 | 1081 | |
40ca29a1 LP |
1082 | sd_bus_detach_event(bus); |
1083 | ||
f54514f3 LP |
1084 | if (!bus->is_kernel) |
1085 | bus_close_fds(bus); | |
1086 | ||
1087 | /* We'll leave the fd open in case this is a kernel bus, since | |
1088 | * there might still be memblocks around that reference this | |
1089 | * bus, and they might need to invoke the | |
1090 | * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are | |
1091 | * freed. */ | |
de1c301e LP |
1092 | } |
1093 | ||
1094 | sd_bus *sd_bus_ref(sd_bus *bus) { | |
1095 | if (!bus) | |
1096 | return NULL; | |
1097 | ||
e4ee6e5c | 1098 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1099 | |
de1c301e LP |
1100 | return bus; |
1101 | } | |
1102 | ||
1103 | sd_bus *sd_bus_unref(sd_bus *bus) { | |
1104 | if (!bus) | |
1105 | return NULL; | |
1106 | ||
e4ee6e5c | 1107 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1108 | bus_free(bus); |
1109 | ||
1110 | return NULL; | |
1111 | } | |
1112 | ||
e3017af9 | 1113 | int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1114 | |
1115 | assert_return(bus, -EINVAL); | |
1116 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1117 | |
f54514f3 | 1118 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1119 | } |
1120 | ||
d728d708 LP |
1121 | int sd_bus_can_send(sd_bus *bus, char type) { |
1122 | int r; | |
1123 | ||
d6888822 LP |
1124 | assert_return(bus, -EINVAL); |
1125 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1126 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1127 | |
d728d708 | 1128 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1129 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1130 | return 0; |
1131 | ||
20902f3e | 1132 | r = bus_ensure_running(bus); |
d728d708 LP |
1133 | if (r < 0) |
1134 | return r; | |
de1c301e | 1135 | |
d728d708 LP |
1136 | return bus->can_fds; |
1137 | } | |
1138 | ||
1139 | return bus_type_is_valid(type); | |
de1c301e LP |
1140 | } |
1141 | ||
98178d39 | 1142 | int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1143 | int r; |
de1c301e | 1144 | |
d6888822 LP |
1145 | assert_return(bus, -EINVAL); |
1146 | assert_return(server_id, -EINVAL); | |
1147 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1148 | |
20902f3e | 1149 | r = bus_ensure_running(bus); |
d728d708 LP |
1150 | if (r < 0) |
1151 | return r; | |
de1c301e | 1152 | |
98178d39 | 1153 | *server_id = bus->server_id; |
d728d708 | 1154 | return 0; |
de1c301e LP |
1155 | } |
1156 | ||
1157 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
1158 | assert(m); | |
1159 | ||
89ffcd2a LP |
1160 | if (m->header->version > b->message_version) |
1161 | return -EPERM; | |
1162 | ||
de1c301e LP |
1163 | if (m->sealed) |
1164 | return 0; | |
1165 | ||
9a17484d | 1166 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1167 | } |
1168 | ||
de1c301e | 1169 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1170 | int r, ret = 0; |
de1c301e LP |
1171 | |
1172 | assert(bus); | |
89ffcd2a | 1173 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1174 | |
de1c301e LP |
1175 | while (bus->wqueue_size > 0) { |
1176 | ||
6629161f LP |
1177 | if (bus->is_kernel) |
1178 | r = bus_kernel_write_message(bus, bus->wqueue[0]); | |
1179 | else | |
1180 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); | |
1181 | ||
de1c301e LP |
1182 | if (r < 0) { |
1183 | sd_bus_close(bus); | |
1184 | return r; | |
1185 | } else if (r == 0) | |
e3017af9 LP |
1186 | /* Didn't do anything this time */ |
1187 | return ret; | |
6629161f | 1188 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1189 | /* Fully written. Let's drop the entry from |
1190 | * the queue. | |
1191 | * | |
1192 | * This isn't particularly optimized, but | |
1193 | * well, this is supposed to be our worst-case | |
1194 | * buffer only, and the socket buffer is | |
1195 | * supposed to be our primary buffer, and if | |
1196 | * it got full, then all bets are off | |
1197 | * anyway. */ | |
1198 | ||
1199 | sd_bus_message_unref(bus->wqueue[0]); | |
1200 | bus->wqueue_size --; | |
1201 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1202 | bus->windex = 0; | |
1203 | ||
e3017af9 | 1204 | ret = 1; |
de1c301e LP |
1205 | } |
1206 | } | |
1207 | ||
e3017af9 | 1208 | return ret; |
de1c301e LP |
1209 | } |
1210 | ||
1211 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 1212 | sd_bus_message *z = NULL; |
e3017af9 | 1213 | int r, ret = 0; |
de1c301e LP |
1214 | |
1215 | assert(bus); | |
1216 | assert(m); | |
89ffcd2a | 1217 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1218 | |
de1c301e LP |
1219 | if (bus->rqueue_size > 0) { |
1220 | /* Dispatch a queued message */ | |
1221 | ||
1222 | *m = bus->rqueue[0]; | |
1223 | bus->rqueue_size --; | |
1224 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1225 | return 1; | |
1226 | } | |
1227 | ||
1228 | /* Try to read a new message */ | |
e3017af9 | 1229 | do { |
6629161f LP |
1230 | if (bus->is_kernel) |
1231 | r = bus_kernel_read_message(bus, &z); | |
1232 | else | |
1233 | r = bus_socket_read_message(bus, &z); | |
1234 | ||
e3017af9 LP |
1235 | if (r < 0) { |
1236 | sd_bus_close(bus); | |
1237 | return r; | |
1238 | } | |
1239 | if (r == 0) | |
1240 | return ret; | |
de1c301e | 1241 | |
2e8d788c | 1242 | ret = 1; |
e3017af9 LP |
1243 | } while (!z); |
1244 | ||
1245 | *m = z; | |
2e8d788c | 1246 | return ret; |
de1c301e LP |
1247 | } |
1248 | ||
1249 | int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { | |
1250 | int r; | |
1251 | ||
d6888822 LP |
1252 | assert_return(bus, -EINVAL); |
1253 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1254 | assert_return(m, -EINVAL); | |
1255 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1256 | |
1257 | if (m->n_fds > 0) { | |
1258 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1259 | if (r < 0) | |
1260 | return r; | |
1261 | if (r == 0) | |
1262 | return -ENOTSUP; | |
1263 | } | |
de1c301e | 1264 | |
29f6aadd LP |
1265 | /* If the serial number isn't kept, then we know that no reply |
1266 | * is expected */ | |
1267 | if (!serial && !m->sealed) | |
1268 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1269 | ||
de1c301e LP |
1270 | r = bus_seal_message(bus, m); |
1271 | if (r < 0) | |
1272 | return r; | |
1273 | ||
5407f2de LP |
1274 | /* If this is a reply and no reply was requested, then let's |
1275 | * suppress this, if we can */ | |
1276 | if (m->dont_send && !serial) | |
7a37d625 | 1277 | return 1; |
5407f2de | 1278 | |
89ffcd2a | 1279 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1280 | size_t idx = 0; |
1281 | ||
6629161f LP |
1282 | if (bus->is_kernel) |
1283 | r = bus_kernel_write_message(bus, m); | |
1284 | else | |
1285 | r = bus_socket_write_message(bus, m, &idx); | |
1286 | ||
de1c301e LP |
1287 | if (r < 0) { |
1288 | sd_bus_close(bus); | |
1289 | return r; | |
6629161f | 1290 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1291 | /* Wasn't fully written. So let's remember how |
1292 | * much was written. Note that the first entry | |
1293 | * of the wqueue array is always allocated so | |
1294 | * that we always can remember how much was | |
1295 | * written. */ | |
1296 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1297 | bus->wqueue_size = 1; | |
1298 | bus->windex = idx; | |
1299 | } | |
1300 | } else { | |
1301 | sd_bus_message **q; | |
1302 | ||
1303 | /* Just append it to the queue. */ | |
1304 | ||
25220239 | 1305 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1306 | return -ENOBUFS; |
1307 | ||
1308 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1309 | if (!q) | |
1310 | return -ENOMEM; | |
1311 | ||
1312 | bus->wqueue = q; | |
1313 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1314 | } | |
1315 | ||
1316 | if (serial) | |
1317 | *serial = BUS_MESSAGE_SERIAL(m); | |
1318 | ||
7a37d625 | 1319 | return 1; |
de1c301e LP |
1320 | } |
1321 | ||
1322 | static usec_t calc_elapse(uint64_t usec) { | |
1323 | if (usec == (uint64_t) -1) | |
1324 | return 0; | |
1325 | ||
1326 | if (usec == 0) | |
e3017af9 | 1327 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1328 | |
1329 | return now(CLOCK_MONOTONIC) + usec; | |
1330 | } | |
1331 | ||
e3017af9 LP |
1332 | static int timeout_compare(const void *a, const void *b) { |
1333 | const struct reply_callback *x = a, *y = b; | |
1334 | ||
1335 | if (x->timeout != 0 && y->timeout == 0) | |
1336 | return -1; | |
1337 | ||
1338 | if (x->timeout == 0 && y->timeout != 0) | |
1339 | return 1; | |
1340 | ||
1341 | if (x->timeout < y->timeout) | |
1342 | return -1; | |
1343 | ||
1344 | if (x->timeout > y->timeout) | |
1345 | return 1; | |
1346 | ||
1347 | return 0; | |
1348 | } | |
1349 | ||
de1c301e LP |
1350 | int sd_bus_send_with_reply( |
1351 | sd_bus *bus, | |
1352 | sd_bus_message *m, | |
52f3ba91 | 1353 | sd_bus_message_handler_t callback, |
de1c301e LP |
1354 | void *userdata, |
1355 | uint64_t usec, | |
1356 | uint64_t *serial) { | |
1357 | ||
1358 | struct reply_callback *c; | |
1359 | int r; | |
1360 | ||
d6888822 LP |
1361 | assert_return(bus, -EINVAL); |
1362 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1363 | assert_return(m, -EINVAL); | |
40ca29a1 | 1364 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1365 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1366 | assert_return(callback, -EINVAL); | |
1367 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1368 | |
1369 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1370 | if (r < 0) | |
1371 | return r; | |
de1c301e | 1372 | |
e3017af9 LP |
1373 | if (usec != (uint64_t) -1) { |
1374 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1375 | if (r < 0) | |
1376 | return r; | |
1377 | } | |
1378 | ||
de1c301e LP |
1379 | r = bus_seal_message(bus, m); |
1380 | if (r < 0) | |
1381 | return r; | |
1382 | ||
eba8617e | 1383 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1384 | if (!c) |
1385 | return -ENOMEM; | |
1386 | ||
1387 | c->callback = callback; | |
1388 | c->userdata = userdata; | |
1389 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1390 | c->timeout = calc_elapse(usec); | |
1391 | ||
1392 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1393 | if (r < 0) { | |
1394 | free(c); | |
1395 | return r; | |
1396 | } | |
1397 | ||
e3017af9 LP |
1398 | if (c->timeout != 0) { |
1399 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1400 | if (r < 0) { | |
1401 | c->timeout = 0; | |
1402 | sd_bus_send_with_reply_cancel(bus, c->serial); | |
1403 | return r; | |
1404 | } | |
1405 | } | |
1406 | ||
de1c301e LP |
1407 | r = sd_bus_send(bus, m, serial); |
1408 | if (r < 0) { | |
e3017af9 | 1409 | sd_bus_send_with_reply_cancel(bus, c->serial); |
de1c301e LP |
1410 | return r; |
1411 | } | |
1412 | ||
1413 | return r; | |
1414 | } | |
1415 | ||
1416 | int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { | |
e3017af9 | 1417 | struct reply_callback *c; |
de1c301e | 1418 | |
d6888822 LP |
1419 | assert_return(bus, -EINVAL); |
1420 | assert_return(serial != 0, -EINVAL); | |
1421 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1422 | |
1423 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1424 | if (!c) | |
1425 | return 0; | |
1426 | ||
e3017af9 LP |
1427 | if (c->timeout != 0) |
1428 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1429 | ||
de1c301e LP |
1430 | free(c); |
1431 | return 1; | |
1432 | } | |
1433 | ||
20902f3e | 1434 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1435 | int r; |
1436 | ||
1437 | assert(bus); | |
1438 | ||
f54514f3 | 1439 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED) |
021a1e78 | 1440 | return -ENOTCONN; |
d728d708 LP |
1441 | if (bus->state == BUS_RUNNING) |
1442 | return 1; | |
89ffcd2a LP |
1443 | |
1444 | for (;;) { | |
1445 | r = sd_bus_process(bus, NULL); | |
1446 | if (r < 0) | |
1447 | return r; | |
d728d708 LP |
1448 | if (bus->state == BUS_RUNNING) |
1449 | return 1; | |
e3017af9 LP |
1450 | if (r > 0) |
1451 | continue; | |
89ffcd2a LP |
1452 | |
1453 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1454 | if (r < 0) | |
1455 | return r; | |
1456 | } | |
1457 | } | |
1458 | ||
de1c301e LP |
1459 | int sd_bus_send_with_reply_and_block( |
1460 | sd_bus *bus, | |
1461 | sd_bus_message *m, | |
1462 | uint64_t usec, | |
1463 | sd_bus_error *error, | |
1464 | sd_bus_message **reply) { | |
1465 | ||
1466 | int r; | |
1467 | usec_t timeout; | |
1468 | uint64_t serial; | |
1469 | bool room = false; | |
1470 | ||
d6888822 LP |
1471 | assert_return(bus, -EINVAL); |
1472 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1473 | assert_return(m, -EINVAL); | |
40ca29a1 | 1474 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1475 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1476 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1477 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1478 | |
20902f3e | 1479 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1480 | if (r < 0) |
1481 | return r; | |
de1c301e LP |
1482 | |
1483 | r = sd_bus_send(bus, m, &serial); | |
1484 | if (r < 0) | |
1485 | return r; | |
1486 | ||
1487 | timeout = calc_elapse(usec); | |
1488 | ||
1489 | for (;;) { | |
1490 | usec_t left; | |
e3017af9 | 1491 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1492 | |
1493 | if (!room) { | |
1494 | sd_bus_message **q; | |
1495 | ||
25220239 LP |
1496 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1497 | return -ENOBUFS; | |
1498 | ||
de1c301e LP |
1499 | /* Make sure there's room for queuing this |
1500 | * locally, before we read the message */ | |
1501 | ||
1502 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1503 | if (!q) | |
1504 | return -ENOMEM; | |
1505 | ||
1506 | bus->rqueue = q; | |
1507 | room = true; | |
1508 | } | |
1509 | ||
6629161f LP |
1510 | if (bus->is_kernel) |
1511 | r = bus_kernel_read_message(bus, &incoming); | |
1512 | else | |
1513 | r = bus_socket_read_message(bus, &incoming); | |
de1c301e LP |
1514 | if (r < 0) |
1515 | return r; | |
e3017af9 | 1516 | if (incoming) { |
89ffcd2a | 1517 | |
de1c301e LP |
1518 | if (incoming->reply_serial == serial) { |
1519 | /* Found a match! */ | |
1520 | ||
40ca29a1 | 1521 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1522 | |
1523 | if (reply) | |
1524 | *reply = incoming; | |
1525 | else | |
1526 | sd_bus_message_unref(incoming); | |
1527 | ||
7a37d625 | 1528 | return 1; |
de1c301e LP |
1529 | } |
1530 | ||
40ca29a1 | 1531 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e LP |
1532 | int k; |
1533 | ||
1534 | r = sd_bus_error_copy(error, &incoming->error); | |
1535 | if (r < 0) { | |
1536 | sd_bus_message_unref(incoming); | |
1537 | return r; | |
1538 | } | |
1539 | ||
40ca29a1 | 1540 | k = sd_bus_error_get_errno(&incoming->error); |
de1c301e | 1541 | sd_bus_message_unref(incoming); |
40ca29a1 | 1542 | return -k; |
de1c301e LP |
1543 | } |
1544 | ||
1545 | sd_bus_message_unref(incoming); | |
1546 | return -EIO; | |
1547 | } | |
1548 | ||
1549 | /* There's already guaranteed to be room for | |
1550 | * this, so need to resize things here */ | |
1551 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1552 | room = false; | |
1553 | ||
1554 | /* Try to read more, right-away */ | |
1555 | continue; | |
1556 | } | |
e3017af9 LP |
1557 | if (r != 0) |
1558 | continue; | |
de1c301e LP |
1559 | |
1560 | if (timeout > 0) { | |
1561 | usec_t n; | |
1562 | ||
1563 | n = now(CLOCK_MONOTONIC); | |
1564 | if (n >= timeout) | |
1565 | return -ETIMEDOUT; | |
1566 | ||
1567 | left = timeout - n; | |
1568 | } else | |
1569 | left = (uint64_t) -1; | |
1570 | ||
e3017af9 | 1571 | r = bus_poll(bus, true, left); |
de1c301e LP |
1572 | if (r < 0) |
1573 | return r; | |
1574 | ||
1575 | r = dispatch_wqueue(bus); | |
1576 | if (r < 0) | |
1577 | return r; | |
1578 | } | |
1579 | } | |
1580 | ||
1581 | int sd_bus_get_fd(sd_bus *bus) { | |
d6888822 LP |
1582 | |
1583 | assert_return(bus, -EINVAL); | |
1584 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1585 | assert_return(bus->input_fd == bus->output_fd, -EPERM); | |
1586 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1587 | |
e82c9509 | 1588 | return bus->input_fd; |
de1c301e LP |
1589 | } |
1590 | ||
1591 | int sd_bus_get_events(sd_bus *bus) { | |
1592 | int flags = 0; | |
1593 | ||
d6888822 LP |
1594 | assert_return(bus, -EINVAL); |
1595 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1596 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1597 | |
1598 | if (bus->state == BUS_OPENING) | |
1599 | flags |= POLLOUT; | |
89ffcd2a LP |
1600 | else if (bus->state == BUS_AUTHENTICATING) { |
1601 | ||
2181a7f5 | 1602 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1603 | flags |= POLLOUT; |
1604 | ||
1605 | flags |= POLLIN; | |
1606 | ||
1607 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1608 | if (bus->rqueue_size <= 0) |
1609 | flags |= POLLIN; | |
1610 | if (bus->wqueue_size > 0) | |
1611 | flags |= POLLOUT; | |
1612 | } | |
1613 | ||
1614 | return flags; | |
1615 | } | |
1616 | ||
e3017af9 LP |
1617 | int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
1618 | struct reply_callback *c; | |
1619 | ||
d6888822 LP |
1620 | assert_return(bus, -EINVAL); |
1621 | assert_return(timeout_usec, -EINVAL); | |
1622 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1623 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 LP |
1624 | |
1625 | if (bus->state == BUS_AUTHENTICATING) { | |
1626 | *timeout_usec = bus->auth_timeout; | |
1627 | return 1; | |
1628 | } | |
1629 | ||
adee69fa LP |
1630 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1631 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1632 | return 0; |
adee69fa | 1633 | } |
e3017af9 | 1634 | |
8efd6381 LP |
1635 | if (bus->rqueue_size > 0) { |
1636 | *timeout_usec = 0; | |
1637 | return 1; | |
1638 | } | |
1639 | ||
e3017af9 | 1640 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
1641 | if (!c) { |
1642 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1643 | return 0; |
adee69fa | 1644 | } |
e3017af9 LP |
1645 | |
1646 | *timeout_usec = c->timeout; | |
1647 | return 1; | |
1648 | } | |
1649 | ||
1650 | static int process_timeout(sd_bus *bus) { | |
eb01ba5d | 1651 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1652 | struct reply_callback *c; |
1653 | usec_t n; | |
1654 | int r; | |
1655 | ||
1656 | assert(bus); | |
1657 | ||
1658 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1659 | if (!c) | |
1660 | return 0; | |
1661 | ||
1662 | n = now(CLOCK_MONOTONIC); | |
1663 | if (c->timeout > n) | |
1664 | return 0; | |
1665 | ||
eb01ba5d LP |
1666 | r = bus_message_new_synthetic_error( |
1667 | bus, | |
1668 | c->serial, | |
40ca29a1 | 1669 | &SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
1670 | &m); |
1671 | if (r < 0) | |
1672 | return r; | |
1673 | ||
e3017af9 LP |
1674 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1675 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1676 | ||
eb01ba5d | 1677 | r = c->callback(bus, m, c->userdata); |
e3017af9 LP |
1678 | free(c); |
1679 | ||
1680 | return r < 0 ? r : 1; | |
1681 | } | |
1682 | ||
9d373862 LP |
1683 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1684 | assert(bus); | |
1685 | assert(m); | |
1686 | ||
1687 | if (bus->state != BUS_HELLO) | |
1688 | return 0; | |
1689 | ||
1690 | /* Let's make sure the first message on the bus is the HELLO | |
1691 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1692 | * here (we leave that to the usual handling), we just verify |
1693 | * we don't let any earlier msg through. */ | |
9d373862 | 1694 | |
40ca29a1 LP |
1695 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1696 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
1697 | return -EIO; |
1698 | ||
1699 | if (m->reply_serial != bus->hello_serial) | |
1700 | return -EIO; | |
1701 | ||
1702 | return 0; | |
1703 | } | |
1704 | ||
a652755d LP |
1705 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1706 | struct reply_callback *c; | |
1707 | int r; | |
1708 | ||
1709 | assert(bus); | |
1710 | assert(m); | |
1711 | ||
40ca29a1 LP |
1712 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1713 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
1714 | return 0; |
1715 | ||
1716 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1717 | if (!c) | |
1718 | return 0; | |
1719 | ||
1720 | if (c->timeout != 0) | |
1721 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1722 | ||
88fe224c LP |
1723 | r = sd_bus_message_rewind(m, true); |
1724 | if (r < 0) | |
1725 | return r; | |
1726 | ||
eb01ba5d | 1727 | r = c->callback(bus, m, c->userdata); |
a652755d LP |
1728 | free(c); |
1729 | ||
1730 | return r; | |
1731 | } | |
1732 | ||
1733 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1734 | struct filter_callback *l; | |
1735 | int r; | |
1736 | ||
392d5b37 LP |
1737 | assert(bus); |
1738 | assert(m); | |
1739 | ||
7286037f LP |
1740 | do { |
1741 | bus->filter_callbacks_modified = false; | |
1742 | ||
1743 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1744 | ||
1745 | if (bus->filter_callbacks_modified) | |
1746 | break; | |
1747 | ||
1748 | /* Don't run this more than once per iteration */ | |
1749 | if (l->last_iteration == bus->iteration_counter) | |
1750 | continue; | |
1751 | ||
1752 | l->last_iteration = bus->iteration_counter; | |
1753 | ||
88fe224c LP |
1754 | r = sd_bus_message_rewind(m, true); |
1755 | if (r < 0) | |
1756 | return r; | |
1757 | ||
eb01ba5d | 1758 | r = l->callback(bus, m, l->userdata); |
7286037f LP |
1759 | if (r != 0) |
1760 | return r; | |
1761 | ||
1762 | } | |
1763 | ||
1764 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1765 | |
1766 | return 0; | |
1767 | } | |
1768 | ||
392d5b37 | 1769 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1770 | int r; |
1771 | ||
392d5b37 LP |
1772 | assert(bus); |
1773 | assert(m); | |
1774 | ||
7286037f LP |
1775 | do { |
1776 | bus->match_callbacks_modified = false; | |
1777 | ||
eb01ba5d | 1778 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1779 | if (r != 0) |
1780 | return r; | |
1781 | ||
1782 | } while (bus->match_callbacks_modified); | |
1783 | ||
1784 | return 0; | |
392d5b37 LP |
1785 | } |
1786 | ||
b9bf7e2b LP |
1787 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1788 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1789 | int r; | |
1790 | ||
1791 | assert(bus); | |
1792 | assert(m); | |
1793 | ||
40ca29a1 | 1794 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
1795 | return 0; |
1796 | ||
1797 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1798 | return 0; | |
1799 | ||
1800 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1801 | return 1; | |
1802 | ||
1803 | if (streq_ptr(m->member, "Ping")) | |
1804 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1805 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1806 | sd_id128_t id; | |
1807 | char sid[33]; | |
1808 | ||
1809 | r = sd_id128_get_machine(&id); | |
1810 | if (r < 0) | |
1811 | return r; | |
1812 | ||
1813 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1814 | if (r < 0) | |
1815 | return r; | |
1816 | ||
1817 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1818 | } else { | |
29ddb38f LP |
1819 | r = sd_bus_message_new_method_errorf( |
1820 | bus, m, &reply, | |
40ca29a1 | 1821 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 1822 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
1823 | } |
1824 | ||
1825 | if (r < 0) | |
1826 | return r; | |
1827 | ||
1828 | r = sd_bus_send(bus, reply, NULL); | |
1829 | if (r < 0) | |
1830 | return r; | |
1831 | ||
1832 | return 1; | |
1833 | } | |
1834 | ||
992c052c | 1835 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
1836 | int r; |
1837 | ||
1838 | assert(bus); | |
992c052c | 1839 | assert(m); |
e3017af9 | 1840 | |
992c052c | 1841 | bus->iteration_counter++; |
e3017af9 | 1842 | |
40ca29a1 LP |
1843 | log_debug("Got message sender=%s object=%s interface=%s member=%s", |
1844 | strna(sd_bus_message_get_sender(m)), | |
1845 | strna(sd_bus_message_get_path(m)), | |
1846 | strna(sd_bus_message_get_interface(m)), | |
1847 | strna(sd_bus_message_get_member(m))); | |
1848 | ||
992c052c LP |
1849 | r = process_hello(bus, m); |
1850 | if (r != 0) | |
1851 | return r; | |
a652755d | 1852 | |
992c052c LP |
1853 | r = process_reply(bus, m); |
1854 | if (r != 0) | |
1855 | return r; | |
e3017af9 | 1856 | |
992c052c LP |
1857 | r = process_filter(bus, m); |
1858 | if (r != 0) | |
1859 | return r; | |
a652755d | 1860 | |
992c052c LP |
1861 | r = process_match(bus, m); |
1862 | if (r != 0) | |
1863 | return r; | |
a652755d | 1864 | |
992c052c LP |
1865 | r = process_builtin(bus, m); |
1866 | if (r != 0) | |
29ddb38f | 1867 | return r; |
a652755d | 1868 | |
992c052c | 1869 | return bus_process_object(bus, m); |
29ddb38f | 1870 | } |
88fe224c | 1871 | |
992c052c LP |
1872 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
1873 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 1874 | int r; |
a652755d | 1875 | |
29ddb38f | 1876 | assert(bus); |
992c052c | 1877 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 1878 | |
992c052c LP |
1879 | r = process_timeout(bus); |
1880 | if (r != 0) | |
1881 | goto null_message; | |
7286037f | 1882 | |
992c052c LP |
1883 | r = dispatch_wqueue(bus); |
1884 | if (r != 0) | |
1885 | goto null_message; | |
7286037f | 1886 | |
992c052c LP |
1887 | r = dispatch_rqueue(bus, &m); |
1888 | if (r < 0) | |
1889 | return r; | |
1890 | if (!m) | |
1891 | goto null_message; | |
7286037f | 1892 | |
992c052c LP |
1893 | r = process_message(bus, m); |
1894 | if (r != 0) | |
1895 | goto null_message; | |
7286037f | 1896 | |
992c052c LP |
1897 | if (ret) { |
1898 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
1899 | if (r < 0) |
1900 | return r; | |
e3017af9 | 1901 | |
992c052c LP |
1902 | *ret = m; |
1903 | m = NULL; | |
1904 | return 1; | |
1905 | } | |
a652755d | 1906 | |
40ca29a1 | 1907 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 1908 | |
992c052c LP |
1909 | r = sd_bus_reply_method_errorf( |
1910 | bus, m, | |
40ca29a1 | 1911 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 1912 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
1913 | if (r < 0) |
1914 | return r; | |
1915 | } | |
e3017af9 | 1916 | |
992c052c | 1917 | return 1; |
0a72c2bd | 1918 | |
992c052c LP |
1919 | null_message: |
1920 | if (r >= 0 && ret) | |
1921 | *ret = NULL; | |
0a72c2bd | 1922 | |
992c052c | 1923 | return r; |
29ddb38f | 1924 | } |
0a72c2bd | 1925 | |
992c052c | 1926 | int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 1927 | BUS_DONT_DESTROY(bus); |
29ddb38f | 1928 | int r; |
0a72c2bd | 1929 | |
992c052c LP |
1930 | /* Returns 0 when we didn't do anything. This should cause the |
1931 | * caller to invoke sd_bus_wait() before returning the next | |
1932 | * time. Returns > 0 when we did something, which possibly | |
1933 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 1934 | |
d6888822 LP |
1935 | assert_return(bus, -EINVAL); |
1936 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 1937 | |
992c052c | 1938 | /* We don't allow recursively invoking sd_bus_process(). */ |
d6888822 | 1939 | assert_return(!bus->processing, -EBUSY); |
0a72c2bd | 1940 | |
992c052c | 1941 | switch (bus->state) { |
0a72c2bd | 1942 | |
992c052c LP |
1943 | case BUS_UNSET: |
1944 | case BUS_CLOSED: | |
1945 | return -ENOTCONN; | |
0a72c2bd | 1946 | |
992c052c LP |
1947 | case BUS_OPENING: |
1948 | r = bus_socket_process_opening(bus); | |
1949 | if (r < 0) | |
29ddb38f | 1950 | return r; |
992c052c LP |
1951 | if (ret) |
1952 | *ret = NULL; | |
a652755d LP |
1953 | return r; |
1954 | ||
992c052c | 1955 | case BUS_AUTHENTICATING: |
392d5b37 | 1956 | |
992c052c | 1957 | r = bus_socket_process_authenticating(bus); |
29ddb38f LP |
1958 | if (r < 0) |
1959 | return r; | |
992c052c LP |
1960 | if (ret) |
1961 | *ret = NULL; | |
1962 | return r; | |
a652755d | 1963 | |
992c052c LP |
1964 | case BUS_RUNNING: |
1965 | case BUS_HELLO: | |
0a72c2bd | 1966 | |
992c052c LP |
1967 | bus->processing = true; |
1968 | r = process_running(bus, ret); | |
1969 | bus->processing = false; | |
43a43f50 | 1970 | |
43a43f50 | 1971 | return r; |
992c052c | 1972 | } |
43a43f50 | 1973 | |
992c052c | 1974 | assert_not_reached("Unknown state"); |
e3017af9 LP |
1975 | } |
1976 | ||
992c052c LP |
1977 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
1978 | struct pollfd p[2] = {}; | |
1979 | int r, e, n; | |
1980 | struct timespec ts; | |
8efd6381 | 1981 | usec_t m = (usec_t) -1; |
adcdb374 LP |
1982 | |
1983 | assert(bus); | |
d6888822 | 1984 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 1985 | |
992c052c LP |
1986 | e = sd_bus_get_events(bus); |
1987 | if (e < 0) | |
1988 | return e; | |
adcdb374 | 1989 | |
992c052c | 1990 | if (need_more) |
8efd6381 LP |
1991 | /* The caller really needs some more data, he doesn't |
1992 | * care about what's already read, or any timeouts | |
1993 | * except its own.*/ | |
992c052c | 1994 | e |= POLLIN; |
992c052c | 1995 | else { |
8efd6381 LP |
1996 | usec_t until; |
1997 | /* The caller wants to process if there's something to | |
1998 | * process, but doesn't care otherwise */ | |
1999 | ||
2000 | r = sd_bus_get_timeout(bus, &until); | |
2001 | if (r < 0) | |
2002 | return r; | |
2003 | if (r > 0) { | |
2004 | usec_t nw; | |
2005 | nw = now(CLOCK_MONOTONIC); | |
2006 | m = until > nw ? until - nw : 0; | |
2007 | } | |
992c052c | 2008 | } |
adcdb374 | 2009 | |
992c052c LP |
2010 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2011 | m = timeout_usec; | |
adcdb374 | 2012 | |
992c052c LP |
2013 | p[0].fd = bus->input_fd; |
2014 | if (bus->output_fd == bus->input_fd) { | |
2015 | p[0].events = e; | |
2016 | n = 1; | |
2017 | } else { | |
2018 | p[0].events = e & POLLIN; | |
2019 | p[1].fd = bus->output_fd; | |
2020 | p[1].events = e & POLLOUT; | |
2021 | n = 2; | |
adcdb374 LP |
2022 | } |
2023 | ||
992c052c | 2024 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2025 | if (r < 0) |
992c052c | 2026 | return -errno; |
adcdb374 | 2027 | |
992c052c | 2028 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2029 | } |
2030 | ||
992c052c | 2031 | int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2032 | |
d6888822 LP |
2033 | assert_return(bus, -EINVAL); |
2034 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2035 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 2036 | |
992c052c LP |
2037 | if (bus->rqueue_size > 0) |
2038 | return 0; | |
9db76355 | 2039 | |
992c052c LP |
2040 | return bus_poll(bus, false, timeout_usec); |
2041 | } | |
9db76355 | 2042 | |
992c052c LP |
2043 | int sd_bus_flush(sd_bus *bus) { |
2044 | int r; | |
9db76355 | 2045 | |
d6888822 LP |
2046 | assert_return(bus, -EINVAL); |
2047 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2048 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 2049 | |
992c052c LP |
2050 | r = bus_ensure_running(bus); |
2051 | if (r < 0) | |
2052 | return r; | |
9db76355 | 2053 | |
992c052c LP |
2054 | if (bus->wqueue_size <= 0) |
2055 | return 0; | |
9db76355 | 2056 | |
992c052c LP |
2057 | for (;;) { |
2058 | r = dispatch_wqueue(bus); | |
9db76355 LP |
2059 | if (r < 0) |
2060 | return r; | |
2061 | ||
992c052c LP |
2062 | if (bus->wqueue_size <= 0) |
2063 | return 0; | |
9db76355 | 2064 | |
992c052c | 2065 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2066 | if (r < 0) |
2067 | return r; | |
9db76355 | 2068 | } |
9db76355 LP |
2069 | } |
2070 | ||
992c052c LP |
2071 | int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2072 | struct filter_callback *f; | |
de1c301e | 2073 | |
d6888822 LP |
2074 | assert_return(bus, -EINVAL); |
2075 | assert_return(callback, -EINVAL); | |
2076 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2077 | |
992c052c LP |
2078 | f = new0(struct filter_callback, 1); |
2079 | if (!f) | |
29ddb38f | 2080 | return -ENOMEM; |
992c052c LP |
2081 | f->callback = callback; |
2082 | f->userdata = userdata; | |
29ddb38f | 2083 | |
992c052c | 2084 | bus->filter_callbacks_modified = true; |
71fda00f | 2085 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2086 | return 0; |
2087 | } | |
a652755d | 2088 | |
992c052c LP |
2089 | int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2090 | struct filter_callback *f; | |
a652755d | 2091 | |
d6888822 LP |
2092 | assert_return(bus, -EINVAL); |
2093 | assert_return(callback, -EINVAL); | |
2094 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2095 | |
992c052c LP |
2096 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2097 | if (f->callback == callback && f->userdata == userdata) { | |
2098 | bus->filter_callbacks_modified = true; | |
71fda00f | 2099 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2100 | free(f); |
2101 | return 1; | |
29ddb38f LP |
2102 | } |
2103 | } | |
2104 | ||
992c052c | 2105 | return 0; |
a652755d | 2106 | } |
392d5b37 | 2107 | |
992c052c LP |
2108 | int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2109 | struct bus_match_component *components = NULL; | |
2110 | unsigned n_components = 0; | |
2111 | uint64_t cookie = 0; | |
2112 | int r = 0; | |
392d5b37 | 2113 | |
d6888822 LP |
2114 | assert_return(bus, -EINVAL); |
2115 | assert_return(match, -EINVAL); | |
2116 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2117 | |
992c052c LP |
2118 | r = bus_match_parse(match, &components, &n_components); |
2119 | if (r < 0) | |
2120 | goto finish; | |
29ddb38f | 2121 | |
992c052c LP |
2122 | if (bus->bus_client) { |
2123 | cookie = ++bus->match_cookie; | |
29ddb38f | 2124 | |
992c052c LP |
2125 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2126 | if (r < 0) | |
2127 | goto finish; | |
392d5b37 LP |
2128 | } |
2129 | ||
992c052c LP |
2130 | bus->match_callbacks_modified = true; |
2131 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2132 | if (r < 0) { |
992c052c LP |
2133 | if (bus->bus_client) |
2134 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2135 | } |
917b5dc7 | 2136 | |
992c052c LP |
2137 | finish: |
2138 | bus_match_parse_free(components, n_components); | |
2139 | return r; | |
917b5dc7 LP |
2140 | } |
2141 | ||
992c052c LP |
2142 | int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2143 | struct bus_match_component *components = NULL; | |
2144 | unsigned n_components = 0; | |
2145 | int r = 0, q = 0; | |
2146 | uint64_t cookie = 0; | |
917b5dc7 | 2147 | |
d6888822 LP |
2148 | assert_return(bus, -EINVAL); |
2149 | assert_return(match, -EINVAL); | |
2150 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2151 | |
992c052c | 2152 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2153 | if (r < 0) |
2154 | return r; | |
f10dda3b | 2155 | |
992c052c LP |
2156 | bus->match_callbacks_modified = true; |
2157 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2158 | |
992c052c LP |
2159 | if (bus->bus_client) |
2160 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2161 | |
992c052c | 2162 | bus_match_parse_free(components, n_components); |
f10dda3b | 2163 | |
992c052c | 2164 | return r < 0 ? r : q; |
f10dda3b LP |
2165 | } |
2166 | ||
992c052c LP |
2167 | bool bus_pid_changed(sd_bus *bus) { |
2168 | assert(bus); | |
f10dda3b | 2169 | |
992c052c LP |
2170 | /* We don't support people creating a bus connection and |
2171 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2172 | |
992c052c | 2173 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2174 | } |
40ca29a1 LP |
2175 | |
2176 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
2177 | void *bus = userdata; | |
2178 | int r; | |
2179 | ||
2180 | assert(bus); | |
2181 | ||
2182 | r = sd_bus_process(bus, NULL); | |
2183 | if (r < 0) | |
2184 | return r; | |
2185 | ||
2186 | return 1; | |
2187 | } | |
2188 | ||
2189 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
2190 | void *bus = userdata; | |
2191 | int r; | |
2192 | ||
2193 | assert(bus); | |
2194 | ||
2195 | r = sd_bus_process(bus, NULL); | |
2196 | if (r < 0) | |
2197 | return r; | |
2198 | ||
2199 | return 1; | |
2200 | } | |
2201 | ||
2202 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2203 | sd_bus *bus = userdata; | |
2204 | int r, e; | |
2205 | usec_t until; | |
2206 | ||
2207 | assert(s); | |
2208 | assert(bus); | |
2209 | ||
2210 | e = sd_bus_get_events(bus); | |
2211 | if (e < 0) | |
2212 | return e; | |
2213 | ||
2214 | if (bus->output_fd != bus->input_fd) { | |
2215 | ||
2216 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2217 | if (r < 0) | |
2218 | return r; | |
2219 | ||
2220 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2221 | if (r < 0) | |
2222 | return r; | |
2223 | } else { | |
2224 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2225 | if (r < 0) | |
2226 | return r; | |
2227 | } | |
2228 | ||
2229 | r = sd_bus_get_timeout(bus, &until); | |
2230 | if (r < 0) | |
2231 | return r; | |
2232 | if (r > 0) { | |
2233 | int j; | |
2234 | ||
2235 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2236 | if (j < 0) | |
2237 | return j; | |
2238 | } | |
2239 | ||
2240 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2241 | if (r < 0) | |
2242 | return r; | |
2243 | ||
2244 | return 1; | |
2245 | } | |
2246 | ||
abc5fe72 LP |
2247 | static int quit_callback(sd_event_source *event, void *userdata) { |
2248 | sd_bus *bus = userdata; | |
2249 | ||
2250 | assert(event); | |
2251 | ||
2252 | sd_bus_flush(bus); | |
2253 | ||
2254 | return 1; | |
2255 | } | |
2256 | ||
40ca29a1 LP |
2257 | int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
2258 | int r; | |
2259 | ||
2260 | assert_return(bus, -EINVAL); | |
2261 | assert_return(event, -EINVAL); | |
2262 | assert_return(!bus->event, -EBUSY); | |
2263 | ||
2264 | assert(!bus->input_io_event_source); | |
2265 | assert(!bus->output_io_event_source); | |
2266 | assert(!bus->time_event_source); | |
2267 | ||
2268 | bus->event = sd_event_ref(event); | |
2269 | ||
2270 | r = sd_event_add_io(event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); | |
2271 | if (r < 0) | |
2272 | goto fail; | |
2273 | ||
2274 | r = sd_event_source_set_priority(bus->input_io_event_source, priority); | |
2275 | if (r < 0) | |
2276 | goto fail; | |
2277 | ||
2278 | if (bus->output_fd != bus->input_fd) { | |
2279 | r = sd_event_add_io(event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); | |
2280 | if (r < 0) | |
2281 | goto fail; | |
2282 | ||
2283 | r = sd_event_source_set_priority(bus->output_io_event_source, priority); | |
2284 | if (r < 0) | |
2285 | goto fail; | |
2286 | } | |
2287 | ||
2288 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2289 | if (r < 0) | |
2290 | goto fail; | |
2291 | ||
2292 | r = sd_event_add_monotonic(event, 0, 0, time_callback, bus, &bus->time_event_source); | |
2293 | if (r < 0) | |
2294 | goto fail; | |
2295 | ||
2296 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2297 | if (r < 0) | |
2298 | goto fail; | |
2299 | ||
abc5fe72 LP |
2300 | r = sd_event_add_quit(event, quit_callback, bus, &bus->quit_event_source); |
2301 | if (r < 0) | |
2302 | goto fail; | |
2303 | ||
40ca29a1 LP |
2304 | return 0; |
2305 | ||
2306 | fail: | |
2307 | sd_bus_detach_event(bus); | |
2308 | return r; | |
2309 | } | |
2310 | ||
2311 | int sd_bus_detach_event(sd_bus *bus) { | |
2312 | assert_return(bus, -EINVAL); | |
2313 | assert_return(bus->event, -ENXIO); | |
2314 | ||
2315 | if (bus->input_io_event_source) | |
2316 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
2317 | ||
2318 | if (bus->output_io_event_source) | |
2319 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
2320 | ||
2321 | if (bus->time_event_source) | |
2322 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); | |
2323 | ||
abc5fe72 LP |
2324 | if (bus->quit_event_source) |
2325 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); | |
2326 | ||
40ca29a1 LP |
2327 | if (bus->event) |
2328 | bus->event = sd_event_unref(bus->event); | |
2329 | ||
2330 | return 0; | |
2331 | } |