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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <endian.h> | |
23 | #include <assert.h> | |
24 | #include <stdlib.h> | |
25 | #include <unistd.h> | |
26 | #include <netdb.h> | |
27 | #include <sys/poll.h> | |
28 | #include <byteswap.h> | |
63edf05e | 29 | #include <sys/mman.h> |
45fbe937 | 30 | #include <pthread.h> |
de1c301e LP |
31 | |
32 | #include "util.h" | |
33 | #include "macro.h" | |
2fd9ae2e | 34 | #include "strv.h" |
0a72c2bd | 35 | #include "set.h" |
6c03089c | 36 | #include "missing.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
29ddb38f LP |
45 | #include "bus-introspect.h" |
46 | #include "bus-signature.h" | |
992c052c | 47 | #include "bus-objects.h" |
40ca29a1 | 48 | #include "bus-util.h" |
a7893c6b | 49 | #include "bus-container.h" |
de1c301e | 50 | |
e3017af9 LP |
51 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
52 | ||
f54514f3 LP |
53 | static void bus_close_fds(sd_bus *b) { |
54 | assert(b); | |
55 | ||
56 | if (b->input_fd >= 0) | |
57 | close_nointr_nofail(b->input_fd); | |
58 | ||
59 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
60 | close_nointr_nofail(b->output_fd); | |
61 | ||
62 | b->input_fd = b->output_fd = -1; | |
63 | } | |
64 | ||
29ddb38f LP |
65 | static void bus_node_destroy(sd_bus *b, struct node *n) { |
66 | struct node_callback *c; | |
67 | struct node_vtable *v; | |
68 | struct node_enumerator *e; | |
69 | ||
70 | assert(b); | |
71 | ||
72 | if (!n) | |
73 | return; | |
74 | ||
75 | while (n->child) | |
76 | bus_node_destroy(b, n->child); | |
77 | ||
78 | while ((c = n->callbacks)) { | |
71fda00f | 79 | LIST_REMOVE(callbacks, n->callbacks, c); |
29ddb38f LP |
80 | free(c); |
81 | } | |
82 | ||
83 | while ((v = n->vtables)) { | |
71fda00f | 84 | LIST_REMOVE(vtables, n->vtables, v); |
29ddb38f LP |
85 | free(v->interface); |
86 | free(v); | |
87 | } | |
88 | ||
89 | while ((e = n->enumerators)) { | |
71fda00f | 90 | LIST_REMOVE(enumerators, n->enumerators, e); |
29ddb38f LP |
91 | free(e); |
92 | } | |
93 | ||
94 | if (n->parent) | |
71fda00f | 95 | LIST_REMOVE(siblings, n->parent->child, n); |
29ddb38f LP |
96 | |
97 | assert_se(hashmap_remove(b->nodes, n->path) == n); | |
98 | free(n->path); | |
99 | free(n); | |
100 | } | |
101 | ||
de1c301e LP |
102 | static void bus_free(sd_bus *b) { |
103 | struct filter_callback *f; | |
29ddb38f | 104 | struct node *n; |
89ffcd2a | 105 | unsigned i; |
de1c301e LP |
106 | |
107 | assert(b); | |
108 | ||
40ca29a1 LP |
109 | sd_bus_detach_event(b); |
110 | ||
f54514f3 | 111 | bus_close_fds(b); |
de1c301e | 112 | |
63edf05e LP |
113 | if (b->kdbus_buffer) |
114 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
115 | ||
de1c301e | 116 | free(b->rbuffer); |
89ffcd2a | 117 | free(b->unique_name); |
2181a7f5 | 118 | free(b->auth_buffer); |
89ffcd2a | 119 | free(b->address); |
e9a967f9 | 120 | free(b->kernel); |
a7893c6b | 121 | free(b->machine); |
89ffcd2a | 122 | |
2fd9ae2e LP |
123 | free(b->exec_path); |
124 | strv_free(b->exec_argv); | |
125 | ||
2c93b4ef LP |
126 | close_many(b->fds, b->n_fds); |
127 | free(b->fds); | |
128 | ||
89ffcd2a LP |
129 | for (i = 0; i < b->rqueue_size; i++) |
130 | sd_bus_message_unref(b->rqueue[i]); | |
de1c301e | 131 | free(b->rqueue); |
89ffcd2a LP |
132 | |
133 | for (i = 0; i < b->wqueue_size; i++) | |
134 | sd_bus_message_unref(b->wqueue[i]); | |
de1c301e | 135 | free(b->wqueue); |
de1c301e LP |
136 | |
137 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 138 | prioq_free(b->reply_callbacks_prioq); |
de1c301e LP |
139 | |
140 | while ((f = b->filter_callbacks)) { | |
71fda00f | 141 | LIST_REMOVE(callbacks, b->filter_callbacks, f); |
de1c301e LP |
142 | free(f); |
143 | } | |
144 | ||
392d5b37 LP |
145 | bus_match_free(&b->match_callbacks); |
146 | ||
29ddb38f LP |
147 | hashmap_free_free(b->vtable_methods); |
148 | hashmap_free_free(b->vtable_properties); | |
149 | ||
150 | while ((n = hashmap_first(b->nodes))) | |
151 | bus_node_destroy(b, n); | |
152 | ||
153 | hashmap_free(b->nodes); | |
154 | ||
bc7fd8cd LP |
155 | bus_kernel_flush_memfd(b); |
156 | ||
45fbe937 LP |
157 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
158 | ||
de1c301e LP |
159 | free(b); |
160 | } | |
161 | ||
021a1e78 | 162 | int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
163 | sd_bus *r; |
164 | ||
d6888822 | 165 | assert_return(ret, -EINVAL); |
021a1e78 | 166 | |
de1c301e LP |
167 | r = new0(sd_bus, 1); |
168 | if (!r) | |
021a1e78 | 169 | return -ENOMEM; |
de1c301e | 170 | |
e4ee6e5c | 171 | r->n_ref = REFCNT_INIT; |
e82c9509 | 172 | r->input_fd = r->output_fd = -1; |
de1c301e | 173 | r->message_version = 1; |
264ad849 | 174 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d5a2b9a6 | 175 | r->original_pid = getpid(); |
de1c301e | 176 | |
45fbe937 LP |
177 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
178 | ||
de1c301e LP |
179 | /* We guarantee that wqueue always has space for at least one |
180 | * entry */ | |
181 | r->wqueue = new(sd_bus_message*, 1); | |
182 | if (!r->wqueue) { | |
183 | free(r); | |
021a1e78 | 184 | return -ENOMEM; |
de1c301e LP |
185 | } |
186 | ||
021a1e78 LP |
187 | *ret = r; |
188 | return 0; | |
189 | } | |
190 | ||
191 | int sd_bus_set_address(sd_bus *bus, const char *address) { | |
192 | char *a; | |
193 | ||
d6888822 LP |
194 | assert_return(bus, -EINVAL); |
195 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
196 | assert_return(address, -EINVAL); | |
197 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
198 | |
199 | a = strdup(address); | |
200 | if (!a) | |
201 | return -ENOMEM; | |
202 | ||
203 | free(bus->address); | |
204 | bus->address = a; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
e82c9509 | 209 | int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
210 | assert_return(bus, -EINVAL); |
211 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
212 | assert_return(input_fd >= 0, -EINVAL); | |
213 | assert_return(output_fd >= 0, -EINVAL); | |
214 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 215 | |
e82c9509 LP |
216 | bus->input_fd = input_fd; |
217 | bus->output_fd = output_fd; | |
021a1e78 LP |
218 | return 0; |
219 | } | |
220 | ||
2fd9ae2e LP |
221 | int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
222 | char *p, **a; | |
223 | ||
d6888822 LP |
224 | assert_return(bus, -EINVAL); |
225 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
226 | assert_return(path, -EINVAL); | |
227 | assert_return(!strv_isempty(argv), -EINVAL); | |
228 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
229 | |
230 | p = strdup(path); | |
231 | if (!p) | |
232 | return -ENOMEM; | |
233 | ||
234 | a = strv_copy(argv); | |
235 | if (!a) { | |
236 | free(p); | |
237 | return -ENOMEM; | |
238 | } | |
239 | ||
240 | free(bus->exec_path); | |
241 | strv_free(bus->exec_argv); | |
242 | ||
243 | bus->exec_path = p; | |
244 | bus->exec_argv = a; | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
94bbf1ba | 249 | int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
250 | assert_return(bus, -EINVAL); |
251 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
252 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 253 | |
94bbf1ba | 254 | bus->bus_client = !!b; |
021a1e78 LP |
255 | return 0; |
256 | } | |
257 | ||
264ad849 | 258 | int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
259 | assert_return(bus, -EINVAL); |
260 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
261 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 262 | |
264ad849 LP |
263 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
264 | return 0; | |
265 | } | |
266 | ||
267 | int sd_bus_negotiate_attach_comm(sd_bus *bus, int b) { | |
d6888822 LP |
268 | assert_return(bus, -EINVAL); |
269 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
270 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
271 | |
272 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_COMM, b); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | int sd_bus_negotiate_attach_exe(sd_bus *bus, int b) { | |
d6888822 LP |
277 | assert_return(bus, -EINVAL); |
278 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
279 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
280 | |
281 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_EXE, b); | |
282 | return 0; | |
283 | } | |
284 | ||
285 | int sd_bus_negotiate_attach_cmdline(sd_bus *bus, int b) { | |
d6888822 LP |
286 | assert_return(bus, -EINVAL); |
287 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
288 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
289 | |
290 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CMDLINE, b); | |
291 | return 0; | |
292 | } | |
293 | ||
294 | int sd_bus_negotiate_attach_cgroup(sd_bus *bus, int b) { | |
d6888822 LP |
295 | assert_return(bus, -EINVAL); |
296 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
297 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
298 | |
299 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CGROUP, b); | |
300 | return 0; | |
301 | } | |
302 | ||
303 | int sd_bus_negotiate_attach_caps(sd_bus *bus, int b) { | |
d6888822 LP |
304 | assert_return(bus, -EINVAL); |
305 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
306 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
307 | |
308 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_CAPS, b); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | int sd_bus_negotiate_attach_selinux_context(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); | |
264ad849 LP |
316 | |
317 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_SECLABEL, b); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | int sd_bus_negotiate_attach_audit(sd_bus *bus, int b) { | |
d6888822 LP |
322 | assert_return(bus, -EINVAL); |
323 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
324 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
264ad849 LP |
325 | |
326 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ATTACH_AUDIT, b); | |
021a1e78 LP |
327 | return 0; |
328 | } | |
de1c301e | 329 | |
98178d39 | 330 | int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
331 | assert_return(bus, -EINVAL); |
332 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
333 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
334 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
335 | |
336 | bus->is_server = !!b; | |
98178d39 | 337 | bus->server_id = server_id; |
2181a7f5 LP |
338 | return 0; |
339 | } | |
340 | ||
341 | int sd_bus_set_anonymous(sd_bus *bus, int b) { | |
d6888822 LP |
342 | assert_return(bus, -EINVAL); |
343 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
344 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
345 | |
346 | bus->anonymous_auth = !!b; | |
347 | return 0; | |
348 | } | |
349 | ||
eb01ba5d | 350 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata) { |
de1c301e LP |
351 | const char *s; |
352 | int r; | |
353 | ||
354 | assert(bus); | |
021a1e78 | 355 | assert(bus->state == BUS_HELLO); |
de1c301e LP |
356 | assert(reply); |
357 | ||
40ca29a1 | 358 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
359 | if (r < 0) |
360 | return r; | |
40ca29a1 LP |
361 | if (r > 0) |
362 | return -r; | |
eb01ba5d | 363 | |
de1c301e LP |
364 | r = sd_bus_message_read(reply, "s", &s); |
365 | if (r < 0) | |
366 | return r; | |
367 | ||
dafb7591 LP |
368 | if (!service_name_is_valid(s) || s[0] != ':') |
369 | return -EBADMSG; | |
370 | ||
de1c301e LP |
371 | bus->unique_name = strdup(s); |
372 | if (!bus->unique_name) | |
373 | return -ENOMEM; | |
374 | ||
dafb7591 LP |
375 | bus->state = BUS_RUNNING; |
376 | ||
de1c301e LP |
377 | return 1; |
378 | } | |
379 | ||
380 | static int bus_send_hello(sd_bus *bus) { | |
381 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
382 | int r; | |
383 | ||
384 | assert(bus); | |
385 | ||
6629161f | 386 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
387 | return 0; |
388 | ||
de1c301e LP |
389 | r = sd_bus_message_new_method_call( |
390 | bus, | |
391 | "org.freedesktop.DBus", | |
392 | "/", | |
393 | "org.freedesktop.DBus", | |
394 | "Hello", | |
395 | &m); | |
396 | if (r < 0) | |
397 | return r; | |
398 | ||
9d373862 | 399 | return sd_bus_send_with_reply(bus, m, hello_callback, NULL, 0, &bus->hello_serial); |
de1c301e LP |
400 | } |
401 | ||
a7e3212d | 402 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
403 | assert(bus); |
404 | ||
f08838da | 405 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 406 | bus->state = BUS_HELLO; |
e3017af9 | 407 | return 1; |
de1c301e LP |
408 | } |
409 | ||
410 | bus->state = BUS_RUNNING; | |
e3017af9 | 411 | return 1; |
de1c301e LP |
412 | } |
413 | ||
414 | static int parse_address_key(const char **p, const char *key, char **value) { | |
415 | size_t l, n = 0; | |
416 | const char *a; | |
417 | char *r = NULL; | |
418 | ||
419 | assert(p); | |
420 | assert(*p); | |
de1c301e LP |
421 | assert(value); |
422 | ||
2fd9ae2e LP |
423 | if (key) { |
424 | l = strlen(key); | |
425 | if (strncmp(*p, key, l) != 0) | |
426 | return 0; | |
de1c301e | 427 | |
2fd9ae2e LP |
428 | if ((*p)[l] != '=') |
429 | return 0; | |
de1c301e | 430 | |
2fd9ae2e LP |
431 | if (*value) |
432 | return -EINVAL; | |
de1c301e | 433 | |
2fd9ae2e LP |
434 | a = *p + l + 1; |
435 | } else | |
436 | a = *p; | |
437 | ||
438 | while (*a != ';' && *a != ',' && *a != 0) { | |
de1c301e LP |
439 | char c, *t; |
440 | ||
441 | if (*a == '%') { | |
442 | int x, y; | |
443 | ||
444 | x = unhexchar(a[1]); | |
445 | if (x < 0) { | |
446 | free(r); | |
447 | return x; | |
448 | } | |
449 | ||
450 | y = unhexchar(a[2]); | |
451 | if (y < 0) { | |
452 | free(r); | |
453 | return y; | |
454 | } | |
455 | ||
de1c301e | 456 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
457 | a += 3; |
458 | } else { | |
de1c301e | 459 | c = *a; |
89ffcd2a LP |
460 | a++; |
461 | } | |
de1c301e | 462 | |
89ffcd2a | 463 | t = realloc(r, n + 2); |
de1c301e LP |
464 | if (!t) { |
465 | free(r); | |
466 | return -ENOMEM; | |
467 | } | |
468 | ||
469 | r = t; | |
470 | r[n++] = c; | |
471 | } | |
472 | ||
89ffcd2a LP |
473 | if (!r) { |
474 | r = strdup(""); | |
475 | if (!r) | |
476 | return -ENOMEM; | |
477 | } else | |
478 | r[n] = 0; | |
479 | ||
480 | if (*a == ',') | |
481 | a++; | |
482 | ||
de1c301e | 483 | *p = a; |
2fd9ae2e LP |
484 | |
485 | free(*value); | |
de1c301e | 486 | *value = r; |
2fd9ae2e | 487 | |
de1c301e LP |
488 | return 1; |
489 | } | |
490 | ||
491 | static void skip_address_key(const char **p) { | |
492 | assert(p); | |
493 | assert(*p); | |
494 | ||
89ffcd2a LP |
495 | *p += strcspn(*p, ","); |
496 | ||
497 | if (**p == ',') | |
498 | (*p) ++; | |
de1c301e LP |
499 | } |
500 | ||
2fd9ae2e LP |
501 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
502 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
503 | size_t l; | |
de1c301e LP |
504 | int r; |
505 | ||
506 | assert(b); | |
2fd9ae2e LP |
507 | assert(p); |
508 | assert(*p); | |
509 | assert(guid); | |
de1c301e | 510 | |
2fd9ae2e LP |
511 | while (**p != 0 && **p != ';') { |
512 | r = parse_address_key(p, "guid", guid); | |
513 | if (r < 0) | |
514 | return r; | |
515 | else if (r > 0) | |
516 | continue; | |
de1c301e | 517 | |
2fd9ae2e LP |
518 | r = parse_address_key(p, "path", &path); |
519 | if (r < 0) | |
520 | return r; | |
521 | else if (r > 0) | |
522 | continue; | |
de1c301e | 523 | |
2fd9ae2e LP |
524 | r = parse_address_key(p, "abstract", &abstract); |
525 | if (r < 0) | |
526 | return r; | |
527 | else if (r > 0) | |
528 | continue; | |
de1c301e | 529 | |
2fd9ae2e LP |
530 | skip_address_key(p); |
531 | } | |
de1c301e | 532 | |
2fd9ae2e LP |
533 | if (!path && !abstract) |
534 | return -EINVAL; | |
de1c301e | 535 | |
2fd9ae2e LP |
536 | if (path && abstract) |
537 | return -EINVAL; | |
538 | ||
539 | if (path) { | |
540 | l = strlen(path); | |
541 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
542 | return -E2BIG; | |
de1c301e | 543 | |
2fd9ae2e LP |
544 | b->sockaddr.un.sun_family = AF_UNIX; |
545 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
546 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
547 | } else if (abstract) { | |
548 | l = strlen(abstract); | |
549 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
550 | return -E2BIG; | |
551 | ||
552 | b->sockaddr.un.sun_family = AF_UNIX; | |
553 | b->sockaddr.un.sun_path[0] = 0; | |
554 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
555 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
556 | } | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
562 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 563 | int r; |
b92bea5d ZJS |
564 | struct addrinfo *result, hints = { |
565 | .ai_socktype = SOCK_STREAM, | |
566 | .ai_flags = AI_ADDRCONFIG, | |
567 | }; | |
2fd9ae2e LP |
568 | |
569 | assert(b); | |
570 | assert(p); | |
571 | assert(*p); | |
572 | assert(guid); | |
573 | ||
574 | while (**p != 0 && **p != ';') { | |
575 | r = parse_address_key(p, "guid", guid); | |
576 | if (r < 0) | |
577 | return r; | |
578 | else if (r > 0) | |
579 | continue; | |
580 | ||
581 | r = parse_address_key(p, "host", &host); | |
582 | if (r < 0) | |
583 | return r; | |
584 | else if (r > 0) | |
585 | continue; | |
586 | ||
587 | r = parse_address_key(p, "port", &port); | |
588 | if (r < 0) | |
589 | return r; | |
590 | else if (r > 0) | |
591 | continue; | |
592 | ||
593 | r = parse_address_key(p, "family", &family); | |
594 | if (r < 0) | |
595 | return r; | |
596 | else if (r > 0) | |
597 | continue; | |
598 | ||
599 | skip_address_key(p); | |
600 | } | |
601 | ||
602 | if (!host || !port) | |
603 | return -EINVAL; | |
604 | ||
2fd9ae2e LP |
605 | if (family) { |
606 | if (streq(family, "ipv4")) | |
607 | hints.ai_family = AF_INET; | |
608 | else if (streq(family, "ipv6")) | |
609 | hints.ai_family = AF_INET6; | |
610 | else | |
611 | return -EINVAL; | |
612 | } | |
613 | ||
614 | r = getaddrinfo(host, port, &hints, &result); | |
615 | if (r == EAI_SYSTEM) | |
616 | return -errno; | |
617 | else if (r != 0) | |
618 | return -EADDRNOTAVAIL; | |
619 | ||
620 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
621 | b->sockaddr_size = result->ai_addrlen; | |
622 | ||
623 | freeaddrinfo(result); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
629 | char *path = NULL; | |
630 | unsigned n_argv = 0, j; | |
631 | char **argv = NULL; | |
632 | int r; | |
633 | ||
634 | assert(b); | |
635 | assert(p); | |
636 | assert(*p); | |
637 | assert(guid); | |
638 | ||
639 | while (**p != 0 && **p != ';') { | |
640 | r = parse_address_key(p, "guid", guid); | |
641 | if (r < 0) | |
642 | goto fail; | |
643 | else if (r > 0) | |
644 | continue; | |
645 | ||
646 | r = parse_address_key(p, "path", &path); | |
647 | if (r < 0) | |
648 | goto fail; | |
649 | else if (r > 0) | |
650 | continue; | |
651 | ||
652 | if (startswith(*p, "argv")) { | |
653 | unsigned ul; | |
654 | ||
655 | errno = 0; | |
656 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 657 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
658 | r = -EINVAL; |
659 | goto fail; | |
660 | } | |
661 | ||
662 | (*p) ++; | |
663 | ||
664 | if (ul >= n_argv) { | |
665 | char **x; | |
666 | ||
667 | x = realloc(argv, sizeof(char*) * (ul + 2)); | |
668 | if (!x) { | |
669 | r = -ENOMEM; | |
670 | goto fail; | |
671 | } | |
672 | ||
673 | memset(x + n_argv, 0, sizeof(char*) * (ul - n_argv + 2)); | |
674 | ||
675 | argv = x; | |
676 | n_argv = ul + 1; | |
677 | } | |
678 | ||
679 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 680 | if (r < 0) |
2fd9ae2e | 681 | goto fail; |
de1c301e | 682 | |
2fd9ae2e | 683 | continue; |
de1c301e LP |
684 | } |
685 | ||
2fd9ae2e LP |
686 | skip_address_key(p); |
687 | } | |
de1c301e | 688 | |
5a0f6033 LP |
689 | if (!path) { |
690 | r = -EINVAL; | |
2fd9ae2e | 691 | goto fail; |
5a0f6033 | 692 | } |
de1c301e | 693 | |
2fd9ae2e LP |
694 | /* Make sure there are no holes in the array, with the |
695 | * exception of argv[0] */ | |
696 | for (j = 1; j < n_argv; j++) | |
697 | if (!argv[j]) { | |
698 | r = -EINVAL; | |
699 | goto fail; | |
700 | } | |
701 | ||
702 | if (argv && argv[0] == NULL) { | |
703 | argv[0] = strdup(path); | |
704 | if (!argv[0]) { | |
705 | r = -ENOMEM; | |
706 | goto fail; | |
707 | } | |
708 | } | |
de1c301e | 709 | |
2fd9ae2e LP |
710 | b->exec_path = path; |
711 | b->exec_argv = argv; | |
712 | return 0; | |
de1c301e | 713 | |
2fd9ae2e LP |
714 | fail: |
715 | for (j = 0; j < n_argv; j++) | |
716 | free(argv[j]); | |
717 | ||
718 | free(argv); | |
719 | free(path); | |
720 | return r; | |
721 | } | |
722 | ||
6629161f LP |
723 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
724 | _cleanup_free_ char *path = NULL; | |
725 | int r; | |
726 | ||
727 | assert(b); | |
728 | assert(p); | |
729 | assert(*p); | |
730 | assert(guid); | |
731 | ||
732 | while (**p != 0 && **p != ';') { | |
733 | r = parse_address_key(p, "guid", guid); | |
734 | if (r < 0) | |
735 | return r; | |
736 | else if (r > 0) | |
737 | continue; | |
738 | ||
739 | r = parse_address_key(p, "path", &path); | |
740 | if (r < 0) | |
741 | return r; | |
742 | else if (r > 0) | |
743 | continue; | |
744 | ||
745 | skip_address_key(p); | |
746 | } | |
747 | ||
748 | if (!path) | |
749 | return -EINVAL; | |
750 | ||
751 | free(b->kernel); | |
752 | b->kernel = path; | |
753 | path = NULL; | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
a7893c6b LP |
758 | static int parse_container_address(sd_bus *b, const char **p, char **guid) { |
759 | _cleanup_free_ char *machine = NULL; | |
760 | int r; | |
761 | ||
762 | assert(b); | |
763 | assert(p); | |
764 | assert(*p); | |
765 | assert(guid); | |
766 | ||
767 | while (**p != 0 && **p != ';') { | |
768 | r = parse_address_key(p, "guid", guid); | |
769 | if (r < 0) | |
770 | return r; | |
771 | else if (r > 0) | |
772 | continue; | |
773 | ||
774 | r = parse_address_key(p, "machine", &machine); | |
775 | if (r < 0) | |
776 | return r; | |
777 | else if (r > 0) | |
778 | continue; | |
779 | ||
780 | skip_address_key(p); | |
781 | } | |
782 | ||
783 | if (!machine) | |
784 | return -EINVAL; | |
785 | ||
786 | free(b->machine); | |
787 | b->machine = machine; | |
788 | machine = NULL; | |
789 | ||
790 | b->sockaddr.un.sun_family = AF_UNIX; | |
791 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
792 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/var/run/dbus/system_bus_socket") - 1; | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
2fd9ae2e LP |
797 | static void bus_reset_parsed_address(sd_bus *b) { |
798 | assert(b); | |
799 | ||
800 | zero(b->sockaddr); | |
801 | b->sockaddr_size = 0; | |
802 | strv_free(b->exec_argv); | |
803 | free(b->exec_path); | |
804 | b->exec_path = NULL; | |
805 | b->exec_argv = NULL; | |
98178d39 | 806 | b->server_id = SD_ID128_NULL; |
6629161f LP |
807 | free(b->kernel); |
808 | b->kernel = NULL; | |
a7893c6b LP |
809 | free(b->machine); |
810 | b->machine = NULL; | |
2fd9ae2e LP |
811 | } |
812 | ||
813 | static int bus_parse_next_address(sd_bus *b) { | |
814 | _cleanup_free_ char *guid = NULL; | |
815 | const char *a; | |
816 | int r; | |
817 | ||
818 | assert(b); | |
819 | ||
820 | if (!b->address) | |
821 | return 0; | |
822 | if (b->address[b->address_index] == 0) | |
823 | return 0; | |
824 | ||
825 | bus_reset_parsed_address(b); | |
826 | ||
827 | a = b->address + b->address_index; | |
de1c301e | 828 | |
2fd9ae2e | 829 | while (*a != 0) { |
de1c301e | 830 | |
2fd9ae2e LP |
831 | if (*a == ';') { |
832 | a++; | |
833 | continue; | |
de1c301e LP |
834 | } |
835 | ||
2fd9ae2e LP |
836 | if (startswith(a, "unix:")) { |
837 | a += 5; | |
de1c301e | 838 | |
2fd9ae2e | 839 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
840 | if (r < 0) |
841 | return r; | |
2fd9ae2e | 842 | break; |
de1c301e | 843 | |
2fd9ae2e | 844 | } else if (startswith(a, "tcp:")) { |
de1c301e | 845 | |
2fd9ae2e LP |
846 | a += 4; |
847 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
848 | if (r < 0) |
849 | return r; | |
de1c301e | 850 | |
2fd9ae2e LP |
851 | break; |
852 | ||
853 | } else if (startswith(a, "unixexec:")) { | |
854 | ||
855 | a += 9; | |
856 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
857 | if (r < 0) |
858 | return r; | |
de1c301e | 859 | |
2fd9ae2e | 860 | break; |
de1c301e | 861 | |
6629161f LP |
862 | } else if (startswith(a, "kernel:")) { |
863 | ||
864 | a += 7; | |
865 | r = parse_kernel_address(b, &a, &guid); | |
866 | if (r < 0) | |
867 | return r; | |
868 | ||
a7893c6b LP |
869 | break; |
870 | } else if (startswith(a, "x-container:")) { | |
871 | ||
872 | a += 12; | |
873 | r = parse_container_address(b, &a, &guid); | |
874 | if (r < 0) | |
875 | return r; | |
876 | ||
6629161f | 877 | break; |
de1c301e LP |
878 | } |
879 | ||
2fd9ae2e LP |
880 | a = strchr(a, ';'); |
881 | if (!a) | |
882 | return 0; | |
de1c301e LP |
883 | } |
884 | ||
885 | if (guid) { | |
98178d39 | 886 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
887 | if (r < 0) |
888 | return r; | |
889 | } | |
890 | ||
2fd9ae2e | 891 | b->address_index = a - b->address; |
de1c301e LP |
892 | return 1; |
893 | } | |
894 | ||
a7e3212d | 895 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
896 | int r; |
897 | ||
898 | assert(b); | |
899 | ||
900 | for (;;) { | |
e82c9509 | 901 | sd_bus_close(b); |
2fd9ae2e | 902 | |
a7893c6b | 903 | if (b->exec_path) { |
a7e3212d | 904 | |
a7893c6b | 905 | r = bus_socket_exec(b); |
2fd9ae2e LP |
906 | if (r >= 0) |
907 | return r; | |
908 | ||
909 | b->last_connect_error = -r; | |
a7893c6b | 910 | } else if (b->kernel) { |
2fd9ae2e | 911 | |
a7893c6b LP |
912 | r = bus_kernel_connect(b); |
913 | if (r >= 0) | |
914 | return r; | |
2fd9ae2e | 915 | |
a7893c6b LP |
916 | b->last_connect_error = -r; |
917 | ||
918 | } else if (b->machine) { | |
919 | ||
920 | r = bus_container_connect(b); | |
2fd9ae2e LP |
921 | if (r >= 0) |
922 | return r; | |
923 | ||
6629161f | 924 | b->last_connect_error = -r; |
6629161f | 925 | |
a7893c6b LP |
926 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { |
927 | ||
928 | r = bus_socket_connect(b); | |
6629161f LP |
929 | if (r >= 0) |
930 | return r; | |
931 | ||
2fd9ae2e LP |
932 | b->last_connect_error = -r; |
933 | } | |
934 | ||
935 | r = bus_parse_next_address(b); | |
936 | if (r < 0) | |
937 | return r; | |
938 | if (r == 0) | |
939 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
940 | } |
941 | } | |
942 | ||
a7e3212d LP |
943 | int bus_next_address(sd_bus *b) { |
944 | assert(b); | |
945 | ||
946 | bus_reset_parsed_address(b); | |
947 | return bus_start_address(b); | |
948 | } | |
949 | ||
021a1e78 | 950 | static int bus_start_fd(sd_bus *b) { |
6629161f | 951 | struct stat st; |
021a1e78 LP |
952 | int r; |
953 | ||
954 | assert(b); | |
e82c9509 LP |
955 | assert(b->input_fd >= 0); |
956 | assert(b->output_fd >= 0); | |
021a1e78 | 957 | |
e82c9509 | 958 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
959 | if (r < 0) |
960 | return r; | |
961 | ||
e82c9509 | 962 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
963 | if (r < 0) |
964 | return r; | |
965 | ||
e82c9509 LP |
966 | if (b->input_fd != b->output_fd) { |
967 | r = fd_nonblock(b->output_fd, true); | |
968 | if (r < 0) | |
969 | return r; | |
970 | ||
971 | r = fd_cloexec(b->output_fd, true); | |
972 | if (r < 0) | |
973 | return r; | |
974 | } | |
975 | ||
6629161f LP |
976 | if (fstat(b->input_fd, &st) < 0) |
977 | return -errno; | |
978 | ||
979 | if (S_ISCHR(b->input_fd)) | |
980 | return bus_kernel_take_fd(b); | |
981 | else | |
982 | return bus_socket_take_fd(b); | |
021a1e78 LP |
983 | } |
984 | ||
985 | int sd_bus_start(sd_bus *bus) { | |
986 | int r; | |
987 | ||
d6888822 LP |
988 | assert_return(bus, -EINVAL); |
989 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
990 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
991 | |
992 | bus->state = BUS_OPENING; | |
993 | ||
2181a7f5 LP |
994 | if (bus->is_server && bus->bus_client) |
995 | return -EINVAL; | |
996 | ||
e82c9509 | 997 | if (bus->input_fd >= 0) |
021a1e78 | 998 | r = bus_start_fd(bus); |
a7893c6b | 999 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1000 | r = bus_start_address(bus); |
021a1e78 LP |
1001 | else |
1002 | return -EINVAL; | |
1003 | ||
1004 | if (r < 0) | |
1005 | return r; | |
1006 | ||
1007 | return bus_send_hello(bus); | |
1008 | } | |
1009 | ||
de1c301e LP |
1010 | int sd_bus_open_system(sd_bus **ret) { |
1011 | const char *e; | |
1012 | sd_bus *b; | |
1013 | int r; | |
1014 | ||
d6888822 | 1015 | assert_return(ret, -EINVAL); |
de1c301e | 1016 | |
021a1e78 LP |
1017 | r = sd_bus_new(&b); |
1018 | if (r < 0) | |
1019 | return r; | |
1020 | ||
6c03089c | 1021 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); |
de1c301e | 1022 | if (e) { |
021a1e78 | 1023 | r = sd_bus_set_address(b, e); |
de1c301e | 1024 | if (r < 0) |
021a1e78 | 1025 | goto fail; |
89ffcd2a | 1026 | } else { |
89ffcd2a LP |
1027 | b->sockaddr.un.sun_family = AF_UNIX; |
1028 | strncpy(b->sockaddr.un.sun_path, "/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); | |
1029 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + sizeof("/run/dbus/system_bus_socket") - 1; | |
89ffcd2a | 1030 | } |
de1c301e | 1031 | |
94bbf1ba | 1032 | b->bus_client = true; |
021a1e78 LP |
1033 | |
1034 | r = sd_bus_start(b); | |
1035 | if (r < 0) | |
1036 | goto fail; | |
de1c301e LP |
1037 | |
1038 | *ret = b; | |
1039 | return 0; | |
021a1e78 LP |
1040 | |
1041 | fail: | |
1042 | bus_free(b); | |
1043 | return r; | |
de1c301e LP |
1044 | } |
1045 | ||
1046 | int sd_bus_open_user(sd_bus **ret) { | |
1047 | const char *e; | |
1048 | sd_bus *b; | |
1049 | size_t l; | |
1050 | int r; | |
1051 | ||
d6888822 | 1052 | assert_return(ret, -EINVAL); |
de1c301e | 1053 | |
021a1e78 LP |
1054 | r = sd_bus_new(&b); |
1055 | if (r < 0) | |
1056 | return r; | |
1057 | ||
6c03089c | 1058 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
de1c301e | 1059 | if (e) { |
021a1e78 | 1060 | r = sd_bus_set_address(b, e); |
de1c301e | 1061 | if (r < 0) |
021a1e78 | 1062 | goto fail; |
89ffcd2a | 1063 | } else { |
6c03089c | 1064 | e = secure_getenv("XDG_RUNTIME_DIR"); |
021a1e78 LP |
1065 | if (!e) { |
1066 | r = -ENOENT; | |
1067 | goto fail; | |
1068 | } | |
de1c301e | 1069 | |
89ffcd2a | 1070 | l = strlen(e); |
021a1e78 LP |
1071 | if (l + 4 > sizeof(b->sockaddr.un.sun_path)) { |
1072 | r = -E2BIG; | |
1073 | goto fail; | |
1074 | } | |
de1c301e | 1075 | |
89ffcd2a LP |
1076 | b->sockaddr.un.sun_family = AF_UNIX; |
1077 | memcpy(mempcpy(b->sockaddr.un.sun_path, e, l), "/bus", 4); | |
1078 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l + 4; | |
de1c301e LP |
1079 | } |
1080 | ||
94bbf1ba | 1081 | b->bus_client = true; |
de1c301e | 1082 | |
021a1e78 | 1083 | r = sd_bus_start(b); |
2571ead1 LP |
1084 | if (r < 0) |
1085 | goto fail; | |
de1c301e LP |
1086 | |
1087 | *ret = b; | |
1088 | return 0; | |
2571ead1 LP |
1089 | |
1090 | fail: | |
021a1e78 | 1091 | bus_free(b); |
2571ead1 | 1092 | return r; |
de1c301e LP |
1093 | } |
1094 | ||
0f8bd8de LP |
1095 | int sd_bus_open_system_remote(const char *host, sd_bus **ret) { |
1096 | _cleanup_free_ char *e = NULL; | |
1097 | char *p = NULL; | |
1098 | sd_bus *bus; | |
1099 | int r; | |
1100 | ||
1101 | assert_return(host, -EINVAL); | |
1102 | assert_return(ret, -EINVAL); | |
1103 | ||
1104 | e = bus_address_escape(host); | |
1105 | if (!e) | |
1106 | return -ENOMEM; | |
1107 | ||
1108 | p = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", NULL); | |
1109 | if (!p) | |
1110 | return -ENOMEM; | |
a7893c6b LP |
1111 | |
1112 | r = sd_bus_new(&bus); | |
1113 | if (r < 0) { | |
1114 | free(p); | |
1115 | return r; | |
1116 | } | |
1117 | ||
1118 | bus->address = p; | |
1119 | bus->bus_client = true; | |
1120 | ||
1121 | r = sd_bus_start(bus); | |
1122 | if (r < 0) { | |
1123 | bus_free(bus); | |
1124 | return r; | |
1125 | } | |
1126 | ||
1127 | *ret = bus; | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | int sd_bus_open_system_container(const char *machine, sd_bus **ret) { | |
1132 | _cleanup_free_ char *e = NULL; | |
1133 | sd_bus *bus; | |
1134 | char *p; | |
1135 | int r; | |
1136 | ||
1137 | assert_return(machine, -EINVAL); | |
1138 | assert_return(ret, -EINVAL); | |
1139 | ||
1140 | e = bus_address_escape(machine); | |
1141 | if (!e) | |
1142 | return -ENOMEM; | |
1143 | ||
1144 | p = strjoin("x-container:machine=", e, NULL); | |
1145 | if (!p) | |
1146 | return -ENOMEM; | |
0f8bd8de LP |
1147 | |
1148 | r = sd_bus_new(&bus); | |
1149 | if (r < 0) { | |
1150 | free(p); | |
1151 | return r; | |
1152 | } | |
1153 | ||
1154 | bus->address = p; | |
1155 | bus->bus_client = true; | |
1156 | ||
1157 | r = sd_bus_start(bus); | |
1158 | if (r < 0) { | |
1159 | bus_free(bus); | |
1160 | return r; | |
1161 | } | |
1162 | ||
1163 | *ret = bus; | |
1164 | return 0; | |
1165 | } | |
1166 | ||
de1c301e LP |
1167 | void sd_bus_close(sd_bus *bus) { |
1168 | if (!bus) | |
1169 | return; | |
d5a2b9a6 LP |
1170 | if (bus->state == BUS_CLOSED) |
1171 | return; | |
1172 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1173 | return; |
1174 | ||
1175 | bus->state = BUS_CLOSED; | |
e82c9509 | 1176 | |
40ca29a1 LP |
1177 | sd_bus_detach_event(bus); |
1178 | ||
f54514f3 LP |
1179 | if (!bus->is_kernel) |
1180 | bus_close_fds(bus); | |
1181 | ||
1182 | /* We'll leave the fd open in case this is a kernel bus, since | |
1183 | * there might still be memblocks around that reference this | |
1184 | * bus, and they might need to invoke the | |
1185 | * KDBUS_CMD_MSG_RELEASE ioctl on the fd when they are | |
1186 | * freed. */ | |
de1c301e LP |
1187 | } |
1188 | ||
1189 | sd_bus *sd_bus_ref(sd_bus *bus) { | |
9d6c7c82 | 1190 | assert_return(bus, NULL); |
de1c301e | 1191 | |
e4ee6e5c | 1192 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1193 | |
de1c301e LP |
1194 | return bus; |
1195 | } | |
1196 | ||
1197 | sd_bus *sd_bus_unref(sd_bus *bus) { | |
9d6c7c82 | 1198 | assert_return(bus, NULL); |
de1c301e | 1199 | |
e4ee6e5c | 1200 | if (REFCNT_DEC(bus->n_ref) <= 0) |
de1c301e LP |
1201 | bus_free(bus); |
1202 | ||
1203 | return NULL; | |
1204 | } | |
1205 | ||
e3017af9 | 1206 | int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1207 | |
1208 | assert_return(bus, -EINVAL); | |
1209 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1210 | |
f54514f3 | 1211 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1212 | } |
1213 | ||
d728d708 LP |
1214 | int sd_bus_can_send(sd_bus *bus, char type) { |
1215 | int r; | |
1216 | ||
d6888822 LP |
1217 | assert_return(bus, -EINVAL); |
1218 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1219 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1220 | |
d728d708 | 1221 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1222 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1223 | return 0; |
1224 | ||
20902f3e | 1225 | r = bus_ensure_running(bus); |
d728d708 LP |
1226 | if (r < 0) |
1227 | return r; | |
de1c301e | 1228 | |
d728d708 LP |
1229 | return bus->can_fds; |
1230 | } | |
1231 | ||
1232 | return bus_type_is_valid(type); | |
de1c301e LP |
1233 | } |
1234 | ||
98178d39 | 1235 | int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1236 | int r; |
de1c301e | 1237 | |
d6888822 LP |
1238 | assert_return(bus, -EINVAL); |
1239 | assert_return(server_id, -EINVAL); | |
1240 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1241 | |
20902f3e | 1242 | r = bus_ensure_running(bus); |
d728d708 LP |
1243 | if (r < 0) |
1244 | return r; | |
de1c301e | 1245 | |
98178d39 | 1246 | *server_id = bus->server_id; |
d728d708 | 1247 | return 0; |
de1c301e LP |
1248 | } |
1249 | ||
1250 | static int bus_seal_message(sd_bus *b, sd_bus_message *m) { | |
1251 | assert(m); | |
1252 | ||
89ffcd2a LP |
1253 | if (m->header->version > b->message_version) |
1254 | return -EPERM; | |
1255 | ||
de1c301e LP |
1256 | if (m->sealed) |
1257 | return 0; | |
1258 | ||
9a17484d | 1259 | return bus_message_seal(m, ++b->serial); |
de1c301e LP |
1260 | } |
1261 | ||
de1c301e | 1262 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1263 | int r, ret = 0; |
de1c301e LP |
1264 | |
1265 | assert(bus); | |
89ffcd2a | 1266 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1267 | |
de1c301e LP |
1268 | while (bus->wqueue_size > 0) { |
1269 | ||
6629161f LP |
1270 | if (bus->is_kernel) |
1271 | r = bus_kernel_write_message(bus, bus->wqueue[0]); | |
1272 | else | |
1273 | r = bus_socket_write_message(bus, bus->wqueue[0], &bus->windex); | |
1274 | ||
de1c301e LP |
1275 | if (r < 0) { |
1276 | sd_bus_close(bus); | |
1277 | return r; | |
1278 | } else if (r == 0) | |
e3017af9 LP |
1279 | /* Didn't do anything this time */ |
1280 | return ret; | |
6629161f | 1281 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1282 | /* Fully written. Let's drop the entry from |
1283 | * the queue. | |
1284 | * | |
1285 | * This isn't particularly optimized, but | |
1286 | * well, this is supposed to be our worst-case | |
1287 | * buffer only, and the socket buffer is | |
1288 | * supposed to be our primary buffer, and if | |
1289 | * it got full, then all bets are off | |
1290 | * anyway. */ | |
1291 | ||
1292 | sd_bus_message_unref(bus->wqueue[0]); | |
1293 | bus->wqueue_size --; | |
1294 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); | |
1295 | bus->windex = 0; | |
1296 | ||
e3017af9 | 1297 | ret = 1; |
de1c301e LP |
1298 | } |
1299 | } | |
1300 | ||
e3017af9 | 1301 | return ret; |
de1c301e LP |
1302 | } |
1303 | ||
1304 | static int dispatch_rqueue(sd_bus *bus, sd_bus_message **m) { | |
2bf938c1 | 1305 | sd_bus_message *z = NULL; |
e3017af9 | 1306 | int r, ret = 0; |
de1c301e LP |
1307 | |
1308 | assert(bus); | |
1309 | assert(m); | |
89ffcd2a | 1310 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1311 | |
de1c301e LP |
1312 | if (bus->rqueue_size > 0) { |
1313 | /* Dispatch a queued message */ | |
1314 | ||
1315 | *m = bus->rqueue[0]; | |
1316 | bus->rqueue_size --; | |
1317 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1318 | return 1; | |
1319 | } | |
1320 | ||
1321 | /* Try to read a new message */ | |
e3017af9 | 1322 | do { |
6629161f LP |
1323 | if (bus->is_kernel) |
1324 | r = bus_kernel_read_message(bus, &z); | |
1325 | else | |
1326 | r = bus_socket_read_message(bus, &z); | |
1327 | ||
e3017af9 LP |
1328 | if (r < 0) { |
1329 | sd_bus_close(bus); | |
1330 | return r; | |
1331 | } | |
1332 | if (r == 0) | |
1333 | return ret; | |
de1c301e | 1334 | |
2e8d788c | 1335 | ret = 1; |
e3017af9 LP |
1336 | } while (!z); |
1337 | ||
1338 | *m = z; | |
2e8d788c | 1339 | return ret; |
de1c301e LP |
1340 | } |
1341 | ||
1342 | int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *serial) { | |
1343 | int r; | |
1344 | ||
d6888822 LP |
1345 | assert_return(bus, -EINVAL); |
1346 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1347 | assert_return(m, -EINVAL); | |
1348 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1349 | |
1350 | if (m->n_fds > 0) { | |
1351 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1352 | if (r < 0) | |
1353 | return r; | |
1354 | if (r == 0) | |
1355 | return -ENOTSUP; | |
1356 | } | |
de1c301e | 1357 | |
29f6aadd LP |
1358 | /* If the serial number isn't kept, then we know that no reply |
1359 | * is expected */ | |
1360 | if (!serial && !m->sealed) | |
1361 | m->header->flags |= SD_BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1362 | ||
de1c301e LP |
1363 | r = bus_seal_message(bus, m); |
1364 | if (r < 0) | |
1365 | return r; | |
1366 | ||
5407f2de LP |
1367 | /* If this is a reply and no reply was requested, then let's |
1368 | * suppress this, if we can */ | |
1369 | if (m->dont_send && !serial) | |
7a37d625 | 1370 | return 1; |
5407f2de | 1371 | |
89ffcd2a | 1372 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1373 | size_t idx = 0; |
1374 | ||
6629161f LP |
1375 | if (bus->is_kernel) |
1376 | r = bus_kernel_write_message(bus, m); | |
1377 | else | |
1378 | r = bus_socket_write_message(bus, m, &idx); | |
1379 | ||
de1c301e LP |
1380 | if (r < 0) { |
1381 | sd_bus_close(bus); | |
1382 | return r; | |
6629161f | 1383 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1384 | /* Wasn't fully written. So let's remember how |
1385 | * much was written. Note that the first entry | |
1386 | * of the wqueue array is always allocated so | |
1387 | * that we always can remember how much was | |
1388 | * written. */ | |
1389 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1390 | bus->wqueue_size = 1; | |
1391 | bus->windex = idx; | |
1392 | } | |
1393 | } else { | |
1394 | sd_bus_message **q; | |
1395 | ||
1396 | /* Just append it to the queue. */ | |
1397 | ||
25220239 | 1398 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1399 | return -ENOBUFS; |
1400 | ||
1401 | q = realloc(bus->wqueue, sizeof(sd_bus_message*) * (bus->wqueue_size + 1)); | |
1402 | if (!q) | |
1403 | return -ENOMEM; | |
1404 | ||
1405 | bus->wqueue = q; | |
1406 | q[bus->wqueue_size ++] = sd_bus_message_ref(m); | |
1407 | } | |
1408 | ||
1409 | if (serial) | |
1410 | *serial = BUS_MESSAGE_SERIAL(m); | |
1411 | ||
7a37d625 | 1412 | return 1; |
de1c301e LP |
1413 | } |
1414 | ||
1415 | static usec_t calc_elapse(uint64_t usec) { | |
1416 | if (usec == (uint64_t) -1) | |
1417 | return 0; | |
1418 | ||
1419 | if (usec == 0) | |
e3017af9 | 1420 | usec = BUS_DEFAULT_TIMEOUT; |
de1c301e LP |
1421 | |
1422 | return now(CLOCK_MONOTONIC) + usec; | |
1423 | } | |
1424 | ||
e3017af9 LP |
1425 | static int timeout_compare(const void *a, const void *b) { |
1426 | const struct reply_callback *x = a, *y = b; | |
1427 | ||
1428 | if (x->timeout != 0 && y->timeout == 0) | |
1429 | return -1; | |
1430 | ||
1431 | if (x->timeout == 0 && y->timeout != 0) | |
1432 | return 1; | |
1433 | ||
1434 | if (x->timeout < y->timeout) | |
1435 | return -1; | |
1436 | ||
1437 | if (x->timeout > y->timeout) | |
1438 | return 1; | |
1439 | ||
1440 | return 0; | |
1441 | } | |
1442 | ||
de1c301e LP |
1443 | int sd_bus_send_with_reply( |
1444 | sd_bus *bus, | |
1445 | sd_bus_message *m, | |
52f3ba91 | 1446 | sd_bus_message_handler_t callback, |
de1c301e LP |
1447 | void *userdata, |
1448 | uint64_t usec, | |
1449 | uint64_t *serial) { | |
1450 | ||
1451 | struct reply_callback *c; | |
1452 | int r; | |
1453 | ||
d6888822 LP |
1454 | assert_return(bus, -EINVAL); |
1455 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1456 | assert_return(m, -EINVAL); | |
40ca29a1 | 1457 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1458 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1459 | assert_return(callback, -EINVAL); | |
1460 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a LP |
1461 | |
1462 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); | |
1463 | if (r < 0) | |
1464 | return r; | |
de1c301e | 1465 | |
e3017af9 LP |
1466 | if (usec != (uint64_t) -1) { |
1467 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); | |
1468 | if (r < 0) | |
1469 | return r; | |
1470 | } | |
1471 | ||
de1c301e LP |
1472 | r = bus_seal_message(bus, m); |
1473 | if (r < 0) | |
1474 | return r; | |
1475 | ||
eba8617e | 1476 | c = new0(struct reply_callback, 1); |
de1c301e LP |
1477 | if (!c) |
1478 | return -ENOMEM; | |
1479 | ||
1480 | c->callback = callback; | |
1481 | c->userdata = userdata; | |
1482 | c->serial = BUS_MESSAGE_SERIAL(m); | |
1483 | c->timeout = calc_elapse(usec); | |
1484 | ||
1485 | r = hashmap_put(bus->reply_callbacks, &c->serial, c); | |
1486 | if (r < 0) { | |
1487 | free(c); | |
1488 | return r; | |
1489 | } | |
1490 | ||
e3017af9 LP |
1491 | if (c->timeout != 0) { |
1492 | r = prioq_put(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1493 | if (r < 0) { | |
1494 | c->timeout = 0; | |
1495 | sd_bus_send_with_reply_cancel(bus, c->serial); | |
1496 | return r; | |
1497 | } | |
1498 | } | |
1499 | ||
de1c301e LP |
1500 | r = sd_bus_send(bus, m, serial); |
1501 | if (r < 0) { | |
e3017af9 | 1502 | sd_bus_send_with_reply_cancel(bus, c->serial); |
de1c301e LP |
1503 | return r; |
1504 | } | |
1505 | ||
1506 | return r; | |
1507 | } | |
1508 | ||
1509 | int sd_bus_send_with_reply_cancel(sd_bus *bus, uint64_t serial) { | |
e3017af9 | 1510 | struct reply_callback *c; |
de1c301e | 1511 | |
d6888822 LP |
1512 | assert_return(bus, -EINVAL); |
1513 | assert_return(serial != 0, -EINVAL); | |
1514 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1515 | |
1516 | c = hashmap_remove(bus->reply_callbacks, &serial); | |
1517 | if (!c) | |
1518 | return 0; | |
1519 | ||
e3017af9 LP |
1520 | if (c->timeout != 0) |
1521 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1522 | ||
de1c301e LP |
1523 | free(c); |
1524 | return 1; | |
1525 | } | |
1526 | ||
20902f3e | 1527 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1528 | int r; |
1529 | ||
1530 | assert(bus); | |
1531 | ||
f54514f3 | 1532 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED) |
021a1e78 | 1533 | return -ENOTCONN; |
d728d708 LP |
1534 | if (bus->state == BUS_RUNNING) |
1535 | return 1; | |
89ffcd2a LP |
1536 | |
1537 | for (;;) { | |
1538 | r = sd_bus_process(bus, NULL); | |
1539 | if (r < 0) | |
1540 | return r; | |
d728d708 LP |
1541 | if (bus->state == BUS_RUNNING) |
1542 | return 1; | |
e3017af9 LP |
1543 | if (r > 0) |
1544 | continue; | |
89ffcd2a LP |
1545 | |
1546 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1547 | if (r < 0) | |
1548 | return r; | |
1549 | } | |
1550 | } | |
1551 | ||
de1c301e LP |
1552 | int sd_bus_send_with_reply_and_block( |
1553 | sd_bus *bus, | |
1554 | sd_bus_message *m, | |
1555 | uint64_t usec, | |
1556 | sd_bus_error *error, | |
1557 | sd_bus_message **reply) { | |
1558 | ||
1559 | int r; | |
1560 | usec_t timeout; | |
1561 | uint64_t serial; | |
1562 | bool room = false; | |
1563 | ||
d6888822 LP |
1564 | assert_return(bus, -EINVAL); |
1565 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1566 | assert_return(m, -EINVAL); | |
40ca29a1 | 1567 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
d6888822 LP |
1568 | assert_return(!(m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
1569 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1570 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
89ffcd2a | 1571 | |
20902f3e | 1572 | r = bus_ensure_running(bus); |
89ffcd2a LP |
1573 | if (r < 0) |
1574 | return r; | |
de1c301e LP |
1575 | |
1576 | r = sd_bus_send(bus, m, &serial); | |
1577 | if (r < 0) | |
1578 | return r; | |
1579 | ||
1580 | timeout = calc_elapse(usec); | |
1581 | ||
1582 | for (;;) { | |
1583 | usec_t left; | |
e3017af9 | 1584 | sd_bus_message *incoming = NULL; |
de1c301e LP |
1585 | |
1586 | if (!room) { | |
1587 | sd_bus_message **q; | |
1588 | ||
25220239 LP |
1589 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
1590 | return -ENOBUFS; | |
1591 | ||
de1c301e LP |
1592 | /* Make sure there's room for queuing this |
1593 | * locally, before we read the message */ | |
1594 | ||
1595 | q = realloc(bus->rqueue, (bus->rqueue_size + 1) * sizeof(sd_bus_message*)); | |
1596 | if (!q) | |
1597 | return -ENOMEM; | |
1598 | ||
1599 | bus->rqueue = q; | |
1600 | room = true; | |
1601 | } | |
1602 | ||
6629161f LP |
1603 | if (bus->is_kernel) |
1604 | r = bus_kernel_read_message(bus, &incoming); | |
1605 | else | |
1606 | r = bus_socket_read_message(bus, &incoming); | |
de1c301e LP |
1607 | if (r < 0) |
1608 | return r; | |
e3017af9 | 1609 | if (incoming) { |
89ffcd2a | 1610 | |
de1c301e LP |
1611 | if (incoming->reply_serial == serial) { |
1612 | /* Found a match! */ | |
1613 | ||
40ca29a1 | 1614 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 LP |
1615 | |
1616 | if (reply) | |
1617 | *reply = incoming; | |
1618 | else | |
1619 | sd_bus_message_unref(incoming); | |
1620 | ||
7a37d625 | 1621 | return 1; |
de1c301e LP |
1622 | } |
1623 | ||
40ca29a1 | 1624 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e LP |
1625 | int k; |
1626 | ||
1627 | r = sd_bus_error_copy(error, &incoming->error); | |
1628 | if (r < 0) { | |
1629 | sd_bus_message_unref(incoming); | |
1630 | return r; | |
1631 | } | |
1632 | ||
40ca29a1 | 1633 | k = sd_bus_error_get_errno(&incoming->error); |
de1c301e | 1634 | sd_bus_message_unref(incoming); |
40ca29a1 | 1635 | return -k; |
de1c301e LP |
1636 | } |
1637 | ||
1638 | sd_bus_message_unref(incoming); | |
1639 | return -EIO; | |
1640 | } | |
1641 | ||
1642 | /* There's already guaranteed to be room for | |
1643 | * this, so need to resize things here */ | |
1644 | bus->rqueue[bus->rqueue_size ++] = incoming; | |
1645 | room = false; | |
1646 | ||
1647 | /* Try to read more, right-away */ | |
1648 | continue; | |
1649 | } | |
e3017af9 LP |
1650 | if (r != 0) |
1651 | continue; | |
de1c301e LP |
1652 | |
1653 | if (timeout > 0) { | |
1654 | usec_t n; | |
1655 | ||
1656 | n = now(CLOCK_MONOTONIC); | |
1657 | if (n >= timeout) | |
1658 | return -ETIMEDOUT; | |
1659 | ||
1660 | left = timeout - n; | |
1661 | } else | |
1662 | left = (uint64_t) -1; | |
1663 | ||
e3017af9 | 1664 | r = bus_poll(bus, true, left); |
de1c301e LP |
1665 | if (r < 0) |
1666 | return r; | |
1667 | ||
1668 | r = dispatch_wqueue(bus); | |
1669 | if (r < 0) | |
1670 | return r; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | int sd_bus_get_fd(sd_bus *bus) { | |
d6888822 LP |
1675 | |
1676 | assert_return(bus, -EINVAL); | |
1677 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1678 | assert_return(bus->input_fd == bus->output_fd, -EPERM); | |
1679 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1680 | |
e82c9509 | 1681 | return bus->input_fd; |
de1c301e LP |
1682 | } |
1683 | ||
1684 | int sd_bus_get_events(sd_bus *bus) { | |
1685 | int flags = 0; | |
1686 | ||
d6888822 LP |
1687 | assert_return(bus, -EINVAL); |
1688 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1689 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e LP |
1690 | |
1691 | if (bus->state == BUS_OPENING) | |
1692 | flags |= POLLOUT; | |
89ffcd2a LP |
1693 | else if (bus->state == BUS_AUTHENTICATING) { |
1694 | ||
2181a7f5 | 1695 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1696 | flags |= POLLOUT; |
1697 | ||
1698 | flags |= POLLIN; | |
1699 | ||
1700 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
1701 | if (bus->rqueue_size <= 0) |
1702 | flags |= POLLIN; | |
1703 | if (bus->wqueue_size > 0) | |
1704 | flags |= POLLOUT; | |
1705 | } | |
1706 | ||
1707 | return flags; | |
1708 | } | |
1709 | ||
e3017af9 LP |
1710 | int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
1711 | struct reply_callback *c; | |
1712 | ||
d6888822 LP |
1713 | assert_return(bus, -EINVAL); |
1714 | assert_return(timeout_usec, -EINVAL); | |
1715 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
1716 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 LP |
1717 | |
1718 | if (bus->state == BUS_AUTHENTICATING) { | |
1719 | *timeout_usec = bus->auth_timeout; | |
1720 | return 1; | |
1721 | } | |
1722 | ||
adee69fa LP |
1723 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
1724 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1725 | return 0; |
adee69fa | 1726 | } |
e3017af9 | 1727 | |
8efd6381 LP |
1728 | if (bus->rqueue_size > 0) { |
1729 | *timeout_usec = 0; | |
1730 | return 1; | |
1731 | } | |
1732 | ||
e3017af9 | 1733 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
1734 | if (!c) { |
1735 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 1736 | return 0; |
adee69fa | 1737 | } |
e3017af9 LP |
1738 | |
1739 | *timeout_usec = c->timeout; | |
1740 | return 1; | |
1741 | } | |
1742 | ||
1743 | static int process_timeout(sd_bus *bus) { | |
eb01ba5d | 1744 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 LP |
1745 | struct reply_callback *c; |
1746 | usec_t n; | |
1747 | int r; | |
1748 | ||
1749 | assert(bus); | |
1750 | ||
1751 | c = prioq_peek(bus->reply_callbacks_prioq); | |
1752 | if (!c) | |
1753 | return 0; | |
1754 | ||
1755 | n = now(CLOCK_MONOTONIC); | |
1756 | if (c->timeout > n) | |
1757 | return 0; | |
1758 | ||
eb01ba5d LP |
1759 | r = bus_message_new_synthetic_error( |
1760 | bus, | |
1761 | c->serial, | |
40ca29a1 | 1762 | &SD_BUS_ERROR_MAKE(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
1763 | &m); |
1764 | if (r < 0) | |
1765 | return r; | |
1766 | ||
e3017af9 LP |
1767 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
1768 | hashmap_remove(bus->reply_callbacks, &c->serial); | |
1769 | ||
eb01ba5d | 1770 | r = c->callback(bus, m, c->userdata); |
e3017af9 LP |
1771 | free(c); |
1772 | ||
1773 | return r < 0 ? r : 1; | |
1774 | } | |
1775 | ||
9d373862 LP |
1776 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
1777 | assert(bus); | |
1778 | assert(m); | |
1779 | ||
1780 | if (bus->state != BUS_HELLO) | |
1781 | return 0; | |
1782 | ||
1783 | /* Let's make sure the first message on the bus is the HELLO | |
1784 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
1785 | * here (we leave that to the usual handling), we just verify |
1786 | * we don't let any earlier msg through. */ | |
9d373862 | 1787 | |
40ca29a1 LP |
1788 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1789 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
1790 | return -EIO; |
1791 | ||
1792 | if (m->reply_serial != bus->hello_serial) | |
1793 | return -EIO; | |
1794 | ||
1795 | return 0; | |
1796 | } | |
1797 | ||
a652755d LP |
1798 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
1799 | struct reply_callback *c; | |
1800 | int r; | |
1801 | ||
1802 | assert(bus); | |
1803 | assert(m); | |
1804 | ||
40ca29a1 LP |
1805 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
1806 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
1807 | return 0; |
1808 | ||
1809 | c = hashmap_remove(bus->reply_callbacks, &m->reply_serial); | |
1810 | if (!c) | |
1811 | return 0; | |
1812 | ||
1813 | if (c->timeout != 0) | |
1814 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
1815 | ||
88fe224c LP |
1816 | r = sd_bus_message_rewind(m, true); |
1817 | if (r < 0) | |
1818 | return r; | |
1819 | ||
eb01ba5d | 1820 | r = c->callback(bus, m, c->userdata); |
a652755d LP |
1821 | free(c); |
1822 | ||
1823 | return r; | |
1824 | } | |
1825 | ||
1826 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
1827 | struct filter_callback *l; | |
1828 | int r; | |
1829 | ||
392d5b37 LP |
1830 | assert(bus); |
1831 | assert(m); | |
1832 | ||
7286037f LP |
1833 | do { |
1834 | bus->filter_callbacks_modified = false; | |
1835 | ||
1836 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1837 | ||
1838 | if (bus->filter_callbacks_modified) | |
1839 | break; | |
1840 | ||
1841 | /* Don't run this more than once per iteration */ | |
1842 | if (l->last_iteration == bus->iteration_counter) | |
1843 | continue; | |
1844 | ||
1845 | l->last_iteration = bus->iteration_counter; | |
1846 | ||
88fe224c LP |
1847 | r = sd_bus_message_rewind(m, true); |
1848 | if (r < 0) | |
1849 | return r; | |
1850 | ||
eb01ba5d | 1851 | r = l->callback(bus, m, l->userdata); |
7286037f LP |
1852 | if (r != 0) |
1853 | return r; | |
1854 | ||
1855 | } | |
1856 | ||
1857 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
1858 | |
1859 | return 0; | |
1860 | } | |
1861 | ||
392d5b37 | 1862 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
1863 | int r; |
1864 | ||
392d5b37 LP |
1865 | assert(bus); |
1866 | assert(m); | |
1867 | ||
7286037f LP |
1868 | do { |
1869 | bus->match_callbacks_modified = false; | |
1870 | ||
eb01ba5d | 1871 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
1872 | if (r != 0) |
1873 | return r; | |
1874 | ||
1875 | } while (bus->match_callbacks_modified); | |
1876 | ||
1877 | return 0; | |
392d5b37 LP |
1878 | } |
1879 | ||
b9bf7e2b LP |
1880 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
1881 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
1882 | int r; | |
1883 | ||
1884 | assert(bus); | |
1885 | assert(m); | |
1886 | ||
40ca29a1 | 1887 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
1888 | return 0; |
1889 | ||
1890 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
1891 | return 0; | |
1892 | ||
1893 | if (m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) | |
1894 | return 1; | |
1895 | ||
1896 | if (streq_ptr(m->member, "Ping")) | |
1897 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1898 | else if (streq_ptr(m->member, "GetMachineId")) { | |
1899 | sd_id128_t id; | |
1900 | char sid[33]; | |
1901 | ||
1902 | r = sd_id128_get_machine(&id); | |
1903 | if (r < 0) | |
1904 | return r; | |
1905 | ||
1906 | r = sd_bus_message_new_method_return(bus, m, &reply); | |
1907 | if (r < 0) | |
1908 | return r; | |
1909 | ||
1910 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
1911 | } else { | |
29ddb38f LP |
1912 | r = sd_bus_message_new_method_errorf( |
1913 | bus, m, &reply, | |
40ca29a1 | 1914 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 1915 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
1916 | } |
1917 | ||
1918 | if (r < 0) | |
1919 | return r; | |
1920 | ||
1921 | r = sd_bus_send(bus, reply, NULL); | |
1922 | if (r < 0) | |
1923 | return r; | |
1924 | ||
1925 | return 1; | |
1926 | } | |
1927 | ||
992c052c | 1928 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
1929 | int r; |
1930 | ||
1931 | assert(bus); | |
992c052c | 1932 | assert(m); |
e3017af9 | 1933 | |
affff0b6 | 1934 | bus->current = m; |
992c052c | 1935 | bus->iteration_counter++; |
e3017af9 | 1936 | |
40ca29a1 LP |
1937 | log_debug("Got message sender=%s object=%s interface=%s member=%s", |
1938 | strna(sd_bus_message_get_sender(m)), | |
1939 | strna(sd_bus_message_get_path(m)), | |
1940 | strna(sd_bus_message_get_interface(m)), | |
1941 | strna(sd_bus_message_get_member(m))); | |
1942 | ||
992c052c LP |
1943 | r = process_hello(bus, m); |
1944 | if (r != 0) | |
affff0b6 | 1945 | goto finish; |
a652755d | 1946 | |
992c052c LP |
1947 | r = process_reply(bus, m); |
1948 | if (r != 0) | |
affff0b6 | 1949 | goto finish; |
e3017af9 | 1950 | |
992c052c LP |
1951 | r = process_filter(bus, m); |
1952 | if (r != 0) | |
affff0b6 | 1953 | goto finish; |
a652755d | 1954 | |
992c052c LP |
1955 | r = process_match(bus, m); |
1956 | if (r != 0) | |
affff0b6 | 1957 | goto finish; |
a652755d | 1958 | |
992c052c LP |
1959 | r = process_builtin(bus, m); |
1960 | if (r != 0) | |
affff0b6 LP |
1961 | goto finish; |
1962 | ||
1963 | r = bus_process_object(bus, m); | |
a652755d | 1964 | |
affff0b6 LP |
1965 | finish: |
1966 | bus->current = NULL; | |
1967 | return r; | |
29ddb38f | 1968 | } |
88fe224c | 1969 | |
992c052c LP |
1970 | static int process_running(sd_bus *bus, sd_bus_message **ret) { |
1971 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
29ddb38f | 1972 | int r; |
a652755d | 1973 | |
29ddb38f | 1974 | assert(bus); |
992c052c | 1975 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 1976 | |
992c052c LP |
1977 | r = process_timeout(bus); |
1978 | if (r != 0) | |
1979 | goto null_message; | |
7286037f | 1980 | |
992c052c LP |
1981 | r = dispatch_wqueue(bus); |
1982 | if (r != 0) | |
1983 | goto null_message; | |
7286037f | 1984 | |
992c052c LP |
1985 | r = dispatch_rqueue(bus, &m); |
1986 | if (r < 0) | |
1987 | return r; | |
1988 | if (!m) | |
1989 | goto null_message; | |
7286037f | 1990 | |
992c052c LP |
1991 | r = process_message(bus, m); |
1992 | if (r != 0) | |
1993 | goto null_message; | |
7286037f | 1994 | |
992c052c LP |
1995 | if (ret) { |
1996 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
1997 | if (r < 0) |
1998 | return r; | |
e3017af9 | 1999 | |
992c052c LP |
2000 | *ret = m; |
2001 | m = NULL; | |
2002 | return 1; | |
2003 | } | |
a652755d | 2004 | |
40ca29a1 | 2005 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2006 | |
992c052c LP |
2007 | r = sd_bus_reply_method_errorf( |
2008 | bus, m, | |
40ca29a1 | 2009 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2010 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2011 | if (r < 0) |
2012 | return r; | |
2013 | } | |
e3017af9 | 2014 | |
992c052c | 2015 | return 1; |
0a72c2bd | 2016 | |
992c052c LP |
2017 | null_message: |
2018 | if (r >= 0 && ret) | |
2019 | *ret = NULL; | |
0a72c2bd | 2020 | |
992c052c | 2021 | return r; |
29ddb38f | 2022 | } |
0a72c2bd | 2023 | |
992c052c | 2024 | int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
8ce2afd6 | 2025 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2026 | int r; |
0a72c2bd | 2027 | |
992c052c LP |
2028 | /* Returns 0 when we didn't do anything. This should cause the |
2029 | * caller to invoke sd_bus_wait() before returning the next | |
2030 | * time. Returns > 0 when we did something, which possibly | |
2031 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2032 | |
d6888822 LP |
2033 | assert_return(bus, -EINVAL); |
2034 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2035 | |
992c052c | 2036 | /* We don't allow recursively invoking sd_bus_process(). */ |
d6888822 | 2037 | assert_return(!bus->processing, -EBUSY); |
0a72c2bd | 2038 | |
992c052c | 2039 | switch (bus->state) { |
0a72c2bd | 2040 | |
992c052c LP |
2041 | case BUS_UNSET: |
2042 | case BUS_CLOSED: | |
2043 | return -ENOTCONN; | |
0a72c2bd | 2044 | |
992c052c LP |
2045 | case BUS_OPENING: |
2046 | r = bus_socket_process_opening(bus); | |
2047 | if (r < 0) | |
29ddb38f | 2048 | return r; |
992c052c LP |
2049 | if (ret) |
2050 | *ret = NULL; | |
a652755d LP |
2051 | return r; |
2052 | ||
992c052c | 2053 | case BUS_AUTHENTICATING: |
392d5b37 | 2054 | |
992c052c | 2055 | r = bus_socket_process_authenticating(bus); |
29ddb38f LP |
2056 | if (r < 0) |
2057 | return r; | |
992c052c LP |
2058 | if (ret) |
2059 | *ret = NULL; | |
2060 | return r; | |
a652755d | 2061 | |
992c052c LP |
2062 | case BUS_RUNNING: |
2063 | case BUS_HELLO: | |
0a72c2bd | 2064 | |
992c052c LP |
2065 | bus->processing = true; |
2066 | r = process_running(bus, ret); | |
2067 | bus->processing = false; | |
43a43f50 | 2068 | |
43a43f50 | 2069 | return r; |
992c052c | 2070 | } |
43a43f50 | 2071 | |
992c052c | 2072 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2073 | } |
2074 | ||
992c052c LP |
2075 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2076 | struct pollfd p[2] = {}; | |
2077 | int r, e, n; | |
2078 | struct timespec ts; | |
8efd6381 | 2079 | usec_t m = (usec_t) -1; |
adcdb374 LP |
2080 | |
2081 | assert(bus); | |
d6888822 | 2082 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); |
adcdb374 | 2083 | |
992c052c LP |
2084 | e = sd_bus_get_events(bus); |
2085 | if (e < 0) | |
2086 | return e; | |
adcdb374 | 2087 | |
992c052c | 2088 | if (need_more) |
8efd6381 LP |
2089 | /* The caller really needs some more data, he doesn't |
2090 | * care about what's already read, or any timeouts | |
2091 | * except its own.*/ | |
992c052c | 2092 | e |= POLLIN; |
992c052c | 2093 | else { |
8efd6381 LP |
2094 | usec_t until; |
2095 | /* The caller wants to process if there's something to | |
2096 | * process, but doesn't care otherwise */ | |
2097 | ||
2098 | r = sd_bus_get_timeout(bus, &until); | |
2099 | if (r < 0) | |
2100 | return r; | |
2101 | if (r > 0) { | |
2102 | usec_t nw; | |
2103 | nw = now(CLOCK_MONOTONIC); | |
2104 | m = until > nw ? until - nw : 0; | |
2105 | } | |
992c052c | 2106 | } |
adcdb374 | 2107 | |
992c052c LP |
2108 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2109 | m = timeout_usec; | |
adcdb374 | 2110 | |
992c052c LP |
2111 | p[0].fd = bus->input_fd; |
2112 | if (bus->output_fd == bus->input_fd) { | |
2113 | p[0].events = e; | |
2114 | n = 1; | |
2115 | } else { | |
2116 | p[0].events = e & POLLIN; | |
2117 | p[1].fd = bus->output_fd; | |
2118 | p[1].events = e & POLLOUT; | |
2119 | n = 2; | |
adcdb374 LP |
2120 | } |
2121 | ||
992c052c | 2122 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2123 | if (r < 0) |
992c052c | 2124 | return -errno; |
adcdb374 | 2125 | |
992c052c | 2126 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2127 | } |
2128 | ||
992c052c | 2129 | int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2130 | |
d6888822 LP |
2131 | assert_return(bus, -EINVAL); |
2132 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2133 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 2134 | |
992c052c LP |
2135 | if (bus->rqueue_size > 0) |
2136 | return 0; | |
9db76355 | 2137 | |
992c052c LP |
2138 | return bus_poll(bus, false, timeout_usec); |
2139 | } | |
9db76355 | 2140 | |
992c052c LP |
2141 | int sd_bus_flush(sd_bus *bus) { |
2142 | int r; | |
9db76355 | 2143 | |
d6888822 LP |
2144 | assert_return(bus, -EINVAL); |
2145 | assert_return(BUS_IS_OPEN(bus->state), -ENOTCONN); | |
2146 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
9db76355 | 2147 | |
992c052c LP |
2148 | r = bus_ensure_running(bus); |
2149 | if (r < 0) | |
2150 | return r; | |
9db76355 | 2151 | |
992c052c LP |
2152 | if (bus->wqueue_size <= 0) |
2153 | return 0; | |
9db76355 | 2154 | |
992c052c LP |
2155 | for (;;) { |
2156 | r = dispatch_wqueue(bus); | |
9db76355 LP |
2157 | if (r < 0) |
2158 | return r; | |
2159 | ||
992c052c LP |
2160 | if (bus->wqueue_size <= 0) |
2161 | return 0; | |
9db76355 | 2162 | |
992c052c | 2163 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2164 | if (r < 0) |
2165 | return r; | |
9db76355 | 2166 | } |
9db76355 LP |
2167 | } |
2168 | ||
992c052c LP |
2169 | int sd_bus_add_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2170 | struct filter_callback *f; | |
de1c301e | 2171 | |
d6888822 LP |
2172 | assert_return(bus, -EINVAL); |
2173 | assert_return(callback, -EINVAL); | |
2174 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2175 | |
992c052c LP |
2176 | f = new0(struct filter_callback, 1); |
2177 | if (!f) | |
29ddb38f | 2178 | return -ENOMEM; |
992c052c LP |
2179 | f->callback = callback; |
2180 | f->userdata = userdata; | |
29ddb38f | 2181 | |
992c052c | 2182 | bus->filter_callbacks_modified = true; |
71fda00f | 2183 | LIST_PREPEND(callbacks, bus->filter_callbacks, f); |
de1c301e LP |
2184 | return 0; |
2185 | } | |
a652755d | 2186 | |
992c052c LP |
2187 | int sd_bus_remove_filter(sd_bus *bus, sd_bus_message_handler_t callback, void *userdata) { |
2188 | struct filter_callback *f; | |
a652755d | 2189 | |
d6888822 LP |
2190 | assert_return(bus, -EINVAL); |
2191 | assert_return(callback, -EINVAL); | |
2192 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
a652755d | 2193 | |
992c052c LP |
2194 | LIST_FOREACH(callbacks, f, bus->filter_callbacks) { |
2195 | if (f->callback == callback && f->userdata == userdata) { | |
2196 | bus->filter_callbacks_modified = true; | |
71fda00f | 2197 | LIST_REMOVE(callbacks, bus->filter_callbacks, f); |
992c052c LP |
2198 | free(f); |
2199 | return 1; | |
29ddb38f LP |
2200 | } |
2201 | } | |
2202 | ||
992c052c | 2203 | return 0; |
a652755d | 2204 | } |
392d5b37 | 2205 | |
992c052c LP |
2206 | int sd_bus_add_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2207 | struct bus_match_component *components = NULL; | |
2208 | unsigned n_components = 0; | |
2209 | uint64_t cookie = 0; | |
2210 | int r = 0; | |
392d5b37 | 2211 | |
d6888822 LP |
2212 | assert_return(bus, -EINVAL); |
2213 | assert_return(match, -EINVAL); | |
2214 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2215 | |
992c052c LP |
2216 | r = bus_match_parse(match, &components, &n_components); |
2217 | if (r < 0) | |
2218 | goto finish; | |
29ddb38f | 2219 | |
992c052c LP |
2220 | if (bus->bus_client) { |
2221 | cookie = ++bus->match_cookie; | |
29ddb38f | 2222 | |
992c052c LP |
2223 | r = bus_add_match_internal(bus, match, components, n_components, cookie); |
2224 | if (r < 0) | |
2225 | goto finish; | |
392d5b37 LP |
2226 | } |
2227 | ||
992c052c LP |
2228 | bus->match_callbacks_modified = true; |
2229 | r = bus_match_add(&bus->match_callbacks, components, n_components, callback, userdata, cookie, NULL); | |
29ddb38f | 2230 | if (r < 0) { |
992c052c LP |
2231 | if (bus->bus_client) |
2232 | bus_remove_match_internal(bus, match, cookie); | |
29ddb38f | 2233 | } |
917b5dc7 | 2234 | |
992c052c LP |
2235 | finish: |
2236 | bus_match_parse_free(components, n_components); | |
2237 | return r; | |
917b5dc7 LP |
2238 | } |
2239 | ||
992c052c LP |
2240 | int sd_bus_remove_match(sd_bus *bus, const char *match, sd_bus_message_handler_t callback, void *userdata) { |
2241 | struct bus_match_component *components = NULL; | |
2242 | unsigned n_components = 0; | |
2243 | int r = 0, q = 0; | |
2244 | uint64_t cookie = 0; | |
917b5dc7 | 2245 | |
d6888822 LP |
2246 | assert_return(bus, -EINVAL); |
2247 | assert_return(match, -EINVAL); | |
2248 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2249 | |
992c052c | 2250 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f LP |
2251 | if (r < 0) |
2252 | return r; | |
f10dda3b | 2253 | |
992c052c LP |
2254 | bus->match_callbacks_modified = true; |
2255 | r = bus_match_remove(&bus->match_callbacks, components, n_components, callback, userdata, &cookie); | |
f10dda3b | 2256 | |
992c052c LP |
2257 | if (bus->bus_client) |
2258 | q = bus_remove_match_internal(bus, match, cookie); | |
f10dda3b | 2259 | |
992c052c | 2260 | bus_match_parse_free(components, n_components); |
f10dda3b | 2261 | |
992c052c | 2262 | return r < 0 ? r : q; |
f10dda3b LP |
2263 | } |
2264 | ||
992c052c LP |
2265 | bool bus_pid_changed(sd_bus *bus) { |
2266 | assert(bus); | |
f10dda3b | 2267 | |
992c052c LP |
2268 | /* We don't support people creating a bus connection and |
2269 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2270 | |
992c052c | 2271 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2272 | } |
40ca29a1 LP |
2273 | |
2274 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
2275 | void *bus = userdata; | |
2276 | int r; | |
2277 | ||
2278 | assert(bus); | |
2279 | ||
2280 | r = sd_bus_process(bus, NULL); | |
2281 | if (r < 0) | |
2282 | return r; | |
2283 | ||
2284 | return 1; | |
2285 | } | |
2286 | ||
2287 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
2288 | void *bus = userdata; | |
2289 | int r; | |
2290 | ||
2291 | assert(bus); | |
2292 | ||
2293 | r = sd_bus_process(bus, NULL); | |
2294 | if (r < 0) | |
2295 | return r; | |
2296 | ||
2297 | return 1; | |
2298 | } | |
2299 | ||
2300 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2301 | sd_bus *bus = userdata; | |
2302 | int r, e; | |
2303 | usec_t until; | |
2304 | ||
2305 | assert(s); | |
2306 | assert(bus); | |
2307 | ||
2308 | e = sd_bus_get_events(bus); | |
2309 | if (e < 0) | |
2310 | return e; | |
2311 | ||
2312 | if (bus->output_fd != bus->input_fd) { | |
2313 | ||
2314 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2315 | if (r < 0) | |
2316 | return r; | |
2317 | ||
2318 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2319 | if (r < 0) | |
2320 | return r; | |
2321 | } else { | |
2322 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2323 | if (r < 0) | |
2324 | return r; | |
2325 | } | |
2326 | ||
2327 | r = sd_bus_get_timeout(bus, &until); | |
2328 | if (r < 0) | |
2329 | return r; | |
2330 | if (r > 0) { | |
2331 | int j; | |
2332 | ||
2333 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2334 | if (j < 0) | |
2335 | return j; | |
2336 | } | |
2337 | ||
2338 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2339 | if (r < 0) | |
2340 | return r; | |
2341 | ||
2342 | return 1; | |
2343 | } | |
2344 | ||
abc5fe72 LP |
2345 | static int quit_callback(sd_event_source *event, void *userdata) { |
2346 | sd_bus *bus = userdata; | |
2347 | ||
2348 | assert(event); | |
2349 | ||
2350 | sd_bus_flush(bus); | |
2351 | ||
2352 | return 1; | |
2353 | } | |
2354 | ||
40ca29a1 LP |
2355 | int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
2356 | int r; | |
2357 | ||
2358 | assert_return(bus, -EINVAL); | |
2359 | assert_return(event, -EINVAL); | |
2360 | assert_return(!bus->event, -EBUSY); | |
2361 | ||
2362 | assert(!bus->input_io_event_source); | |
2363 | assert(!bus->output_io_event_source); | |
2364 | assert(!bus->time_event_source); | |
2365 | ||
2366 | bus->event = sd_event_ref(event); | |
2367 | ||
2368 | r = sd_event_add_io(event, bus->input_fd, 0, io_callback, bus, &bus->input_io_event_source); | |
2369 | if (r < 0) | |
2370 | goto fail; | |
2371 | ||
2372 | r = sd_event_source_set_priority(bus->input_io_event_source, priority); | |
2373 | if (r < 0) | |
2374 | goto fail; | |
2375 | ||
2376 | if (bus->output_fd != bus->input_fd) { | |
2377 | r = sd_event_add_io(event, bus->output_fd, 0, io_callback, bus, &bus->output_io_event_source); | |
2378 | if (r < 0) | |
2379 | goto fail; | |
2380 | ||
2381 | r = sd_event_source_set_priority(bus->output_io_event_source, priority); | |
2382 | if (r < 0) | |
2383 | goto fail; | |
2384 | } | |
2385 | ||
2386 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
2387 | if (r < 0) | |
2388 | goto fail; | |
2389 | ||
2390 | r = sd_event_add_monotonic(event, 0, 0, time_callback, bus, &bus->time_event_source); | |
2391 | if (r < 0) | |
2392 | goto fail; | |
2393 | ||
2394 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
2395 | if (r < 0) | |
2396 | goto fail; | |
2397 | ||
abc5fe72 LP |
2398 | r = sd_event_add_quit(event, quit_callback, bus, &bus->quit_event_source); |
2399 | if (r < 0) | |
2400 | goto fail; | |
2401 | ||
40ca29a1 LP |
2402 | return 0; |
2403 | ||
2404 | fail: | |
2405 | sd_bus_detach_event(bus); | |
2406 | return r; | |
2407 | } | |
2408 | ||
2409 | int sd_bus_detach_event(sd_bus *bus) { | |
2410 | assert_return(bus, -EINVAL); | |
2411 | assert_return(bus->event, -ENXIO); | |
2412 | ||
2413 | if (bus->input_io_event_source) | |
2414 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
2415 | ||
2416 | if (bus->output_io_event_source) | |
2417 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
2418 | ||
2419 | if (bus->time_event_source) | |
2420 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); | |
2421 | ||
abc5fe72 LP |
2422 | if (bus->quit_event_source) |
2423 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); | |
2424 | ||
40ca29a1 LP |
2425 | if (bus->event) |
2426 | bus->event = sd_event_unref(bus->event); | |
2427 | ||
2428 | return 0; | |
2429 | } | |
affff0b6 LP |
2430 | |
2431 | sd_bus_message* sd_bus_get_current(sd_bus *bus) { | |
2432 | assert_return(bus, NULL); | |
2433 | ||
2434 | return bus->current; | |
2435 | } |