]>
Commit | Line | Data |
---|---|---|
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> | |
de1c301e LP |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
25 | #include <netdb.h> | |
0a6f50c0 | 26 | #include <poll.h> |
63edf05e | 27 | #include <sys/mman.h> |
45fbe937 | 28 | #include <pthread.h> |
de1c301e | 29 | |
de1c301e | 30 | #include "sd-bus.h" |
07630cea LP |
31 | |
32 | #include "bus-container.h" | |
33 | #include "bus-control.h" | |
de1c301e | 34 | #include "bus-internal.h" |
6629161f | 35 | #include "bus-kernel.h" |
07630cea LP |
36 | #include "bus-label.h" |
37 | #include "bus-message.h" | |
992c052c | 38 | #include "bus-objects.h" |
0461f8cd | 39 | #include "bus-protocol.h" |
19befb2d | 40 | #include "bus-slot.h" |
07630cea LP |
41 | #include "bus-socket.h" |
42 | #include "bus-track.h" | |
43 | #include "bus-type.h" | |
44 | #include "bus-util.h" | |
45 | #include "cgroup-util.h" | |
46 | #include "def.h" | |
47 | #include "hostname-util.h" | |
48 | #include "macro.h" | |
49 | #include "missing.h" | |
50 | #include "string-util.h" | |
51 | #include "strv.h" | |
52 | #include "util.h" | |
de1c301e | 53 | |
b56c4604 LP |
54 | #define log_debug_bus_message(m) \ |
55 | do { \ | |
56 | sd_bus_message *_mm = (m); \ | |
57 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", \ | |
58 | bus_message_type_to_string(_mm->header->type), \ | |
59 | strna(sd_bus_message_get_sender(_mm)), \ | |
60 | strna(sd_bus_message_get_destination(_mm)), \ | |
61 | strna(sd_bus_message_get_path(_mm)), \ | |
62 | strna(sd_bus_message_get_interface(_mm)), \ | |
63 | strna(sd_bus_message_get_member(_mm)), \ | |
64 | BUS_MESSAGE_COOKIE(_mm), \ | |
65 | _mm->reply_cookie, \ | |
66 | strna(_mm->error.message)); \ | |
67 | } while (false) | |
f9f97ca6 | 68 | |
e3017af9 | 69 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
70 | static int attach_io_events(sd_bus *b); |
71 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 72 | |
fa2f8973 LP |
73 | static thread_local sd_bus *default_system_bus = NULL; |
74 | static thread_local sd_bus *default_user_bus = NULL; | |
75 | static thread_local sd_bus *default_starter_bus = NULL; | |
76 | ||
f54514f3 LP |
77 | static void bus_close_fds(sd_bus *b) { |
78 | assert(b); | |
79 | ||
1e05d493 LP |
80 | detach_io_events(b); |
81 | ||
0fd8d506 | 82 | if (b->input_fd != b->output_fd) |
03e334a1 | 83 | safe_close(b->output_fd); |
0fd8d506 | 84 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
85 | } |
86 | ||
0e586eae | 87 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
88 | assert(b); |
89 | ||
f389bf15 LP |
90 | while (b->rqueue_size > 0) |
91 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
92 | ||
253f96e5 | 93 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 94 | b->rqueue_allocated = 0; |
0e586eae | 95 | |
f389bf15 LP |
96 | while (b->wqueue_size > 0) |
97 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 98 | |
253f96e5 | 99 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 100 | b->wqueue_allocated = 0; |
0e586eae LP |
101 | } |
102 | ||
de1c301e | 103 | static void bus_free(sd_bus *b) { |
19befb2d | 104 | sd_bus_slot *s; |
de1c301e LP |
105 | |
106 | assert(b); | |
8f8f05a9 LP |
107 | assert(!b->track_queue); |
108 | ||
19befb2d LP |
109 | b->state = BUS_CLOSED; |
110 | ||
40ca29a1 LP |
111 | sd_bus_detach_event(b); |
112 | ||
19befb2d LP |
113 | while ((s = b->slots)) { |
114 | /* At this point only floating slots can still be | |
115 | * around, because the non-floating ones keep a | |
116 | * reference to the bus, and we thus couldn't be | |
117 | * destructing right now... We forcibly disconnect the | |
118 | * slots here, so that they still can be referenced by | |
119 | * apps, but are dead. */ | |
120 | ||
121 | assert(s->floating); | |
122 | bus_slot_disconnect(s); | |
123 | sd_bus_slot_unref(s); | |
124 | } | |
125 | ||
f4d140e9 LP |
126 | if (b->default_bus_ptr) |
127 | *b->default_bus_ptr = NULL; | |
128 | ||
f54514f3 | 129 | bus_close_fds(b); |
de1c301e | 130 | |
63edf05e LP |
131 | if (b->kdbus_buffer) |
132 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
133 | ||
c4e6556c | 134 | free(b->label); |
de1c301e | 135 | free(b->rbuffer); |
89ffcd2a | 136 | free(b->unique_name); |
2181a7f5 | 137 | free(b->auth_buffer); |
89ffcd2a | 138 | free(b->address); |
e9a967f9 | 139 | free(b->kernel); |
a7893c6b | 140 | free(b->machine); |
8a0e0ed9 | 141 | free(b->fake_label); |
751bc6ac | 142 | free(b->cgroup_root); |
455971c1 | 143 | free(b->description); |
89ffcd2a | 144 | |
2fd9ae2e LP |
145 | free(b->exec_path); |
146 | strv_free(b->exec_argv); | |
147 | ||
2c93b4ef LP |
148 | close_many(b->fds, b->n_fds); |
149 | free(b->fds); | |
150 | ||
0e586eae | 151 | bus_reset_queues(b); |
de1c301e | 152 | |
c9fe4af7 | 153 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 154 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 155 | |
75a0da95 | 156 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
157 | bus_match_free(&b->match_callbacks); |
158 | ||
29ddb38f LP |
159 | hashmap_free_free(b->vtable_methods); |
160 | hashmap_free_free(b->vtable_properties); | |
161 | ||
19befb2d | 162 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
163 | hashmap_free(b->nodes); |
164 | ||
bc7fd8cd LP |
165 | bus_kernel_flush_memfd(b); |
166 | ||
45fbe937 LP |
167 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
168 | ||
de1c301e LP |
169 | free(b); |
170 | } | |
171 | ||
d9f644e2 | 172 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
173 | sd_bus *r; |
174 | ||
d6888822 | 175 | assert_return(ret, -EINVAL); |
021a1e78 | 176 | |
de1c301e LP |
177 | r = new0(sd_bus, 1); |
178 | if (!r) | |
021a1e78 | 179 | return -ENOMEM; |
de1c301e | 180 | |
e4ee6e5c | 181 | r->n_ref = REFCNT_INIT; |
e82c9509 | 182 | r->input_fd = r->output_fd = -1; |
de1c301e | 183 | r->message_version = 1; |
3310dfd5 | 184 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 185 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 186 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 187 | r->original_pid = getpid(); |
de1c301e | 188 | |
45fbe937 LP |
189 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
190 | ||
de1c301e LP |
191 | /* We guarantee that wqueue always has space for at least one |
192 | * entry */ | |
821e0756 | 193 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 194 | free(r); |
021a1e78 | 195 | return -ENOMEM; |
de1c301e LP |
196 | } |
197 | ||
021a1e78 LP |
198 | *ret = r; |
199 | return 0; | |
200 | } | |
201 | ||
d9f644e2 | 202 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
203 | char *a; |
204 | ||
d6888822 LP |
205 | assert_return(bus, -EINVAL); |
206 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
207 | assert_return(address, -EINVAL); | |
208 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
209 | |
210 | a = strdup(address); | |
211 | if (!a) | |
212 | return -ENOMEM; | |
213 | ||
214 | free(bus->address); | |
215 | bus->address = a; | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
d9f644e2 | 220 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
221 | assert_return(bus, -EINVAL); |
222 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
223 | assert_return(input_fd >= 0, -EBADF); |
224 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 225 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 226 | |
e82c9509 LP |
227 | bus->input_fd = input_fd; |
228 | bus->output_fd = output_fd; | |
021a1e78 LP |
229 | return 0; |
230 | } | |
231 | ||
d9f644e2 | 232 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
233 | char *p, **a; |
234 | ||
d6888822 LP |
235 | assert_return(bus, -EINVAL); |
236 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
237 | assert_return(path, -EINVAL); | |
238 | assert_return(!strv_isempty(argv), -EINVAL); | |
239 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
240 | |
241 | p = strdup(path); | |
242 | if (!p) | |
243 | return -ENOMEM; | |
244 | ||
245 | a = strv_copy(argv); | |
246 | if (!a) { | |
247 | free(p); | |
248 | return -ENOMEM; | |
249 | } | |
250 | ||
251 | free(bus->exec_path); | |
252 | strv_free(bus->exec_argv); | |
253 | ||
254 | bus->exec_path = p; | |
255 | bus->exec_argv = a; | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
d9f644e2 | 260 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
261 | assert_return(bus, -EINVAL); |
262 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
263 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 264 | |
94bbf1ba | 265 | bus->bus_client = !!b; |
021a1e78 LP |
266 | return 0; |
267 | } | |
268 | ||
09365592 LP |
269 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
270 | assert_return(bus, -EINVAL); | |
271 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
272 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
273 | ||
274 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
275 | return 0; | |
276 | } | |
277 | ||
d9f644e2 | 278 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
279 | assert_return(bus, -EINVAL); |
280 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
281 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 282 | |
264ad849 LP |
283 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
284 | return 0; | |
285 | } | |
286 | ||
4fc31988 | 287 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 288 | uint64_t new_flags; |
16be4368 | 289 | assert_return(bus, -EINVAL); |
b5dae4c7 | 290 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
291 | assert_return(!bus_pid_changed(bus), -ECHILD); |
292 | ||
b5dae4c7 LP |
293 | new_flags = bus->attach_flags; |
294 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
295 | ||
296 | if (bus->attach_flags == new_flags) | |
297 | return 0; | |
298 | ||
299 | bus->attach_flags = new_flags; | |
300 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
301 | bus_kernel_realize_attach_flags(bus); | |
302 | ||
16be4368 KS |
303 | return 0; |
304 | } | |
305 | ||
b5dae4c7 LP |
306 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
307 | uint64_t new_flags; | |
308 | ||
16be4368 | 309 | assert_return(bus, -EINVAL); |
95c4fe82 | 310 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 311 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
312 | assert_return(!bus_pid_changed(bus), -ECHILD); |
313 | ||
b5dae4c7 LP |
314 | if (b) |
315 | bus->creds_mask |= mask; | |
316 | else | |
317 | bus->creds_mask &= ~mask; | |
318 | ||
49b832c5 | 319 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
320 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
321 | ||
322 | /* Make sure we don't lose the timestamp flag */ | |
323 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
324 | if (bus->attach_flags == new_flags) | |
325 | return 0; | |
49b832c5 | 326 | |
b5dae4c7 LP |
327 | bus->attach_flags = new_flags; |
328 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
329 | bus_kernel_realize_attach_flags(bus); | |
330 | ||
331 | return 0; | |
021a1e78 | 332 | } |
de1c301e | 333 | |
d9f644e2 | 334 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
335 | assert_return(bus, -EINVAL); |
336 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
337 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
338 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
339 | |
340 | bus->is_server = !!b; | |
98178d39 | 341 | bus->server_id = server_id; |
2181a7f5 LP |
342 | return 0; |
343 | } | |
344 | ||
d9f644e2 | 345 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
346 | assert_return(bus, -EINVAL); |
347 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
348 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
349 | |
350 | bus->anonymous_auth = !!b; | |
351 | return 0; | |
352 | } | |
353 | ||
adacb957 LP |
354 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
355 | assert_return(bus, -EINVAL); | |
356 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
357 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
358 | ||
359 | bus->trusted = !!b; | |
360 | return 0; | |
361 | } | |
362 | ||
455971c1 | 363 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 364 | assert_return(bus, -EINVAL); |
5972fe95 LP |
365 | assert_return(bus->state == BUS_UNSET, -EPERM); |
366 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
367 | ||
d1b91c99 | 368 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
369 | } |
370 | ||
c0765ddb LP |
371 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
372 | assert_return(bus, -EINVAL); | |
373 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
374 | ||
375 | bus->allow_interactive_authorization = !!b; | |
376 | return 0; | |
377 | } | |
378 | ||
379 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
380 | assert_return(bus, -EINVAL); | |
381 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
382 | ||
383 | return bus->allow_interactive_authorization; | |
384 | } | |
385 | ||
19070062 | 386 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 387 | const char *s; |
19070062 | 388 | sd_bus *bus; |
de1c301e LP |
389 | int r; |
390 | ||
19070062 LP |
391 | assert(reply); |
392 | bus = reply->bus; | |
de1c301e | 393 | assert(bus); |
c99c09a2 | 394 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 395 | |
40ca29a1 | 396 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
397 | if (r > 0) |
398 | return -r; | |
eb01ba5d | 399 | |
de1c301e LP |
400 | r = sd_bus_message_read(reply, "s", &s); |
401 | if (r < 0) | |
402 | return r; | |
403 | ||
dafb7591 LP |
404 | if (!service_name_is_valid(s) || s[0] != ':') |
405 | return -EBADMSG; | |
406 | ||
de1c301e LP |
407 | bus->unique_name = strdup(s); |
408 | if (!bus->unique_name) | |
409 | return -ENOMEM; | |
410 | ||
c99c09a2 LP |
411 | if (bus->state == BUS_HELLO) |
412 | bus->state = BUS_RUNNING; | |
dafb7591 | 413 | |
de1c301e LP |
414 | return 1; |
415 | } | |
416 | ||
417 | static int bus_send_hello(sd_bus *bus) { | |
418 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
419 | int r; | |
420 | ||
421 | assert(bus); | |
422 | ||
6629161f | 423 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
424 | return 0; |
425 | ||
de1c301e LP |
426 | r = sd_bus_message_new_method_call( |
427 | bus, | |
151b9b96 | 428 | &m, |
de1c301e | 429 | "org.freedesktop.DBus", |
a7639e37 | 430 | "/org/freedesktop/DBus", |
de1c301e | 431 | "org.freedesktop.DBus", |
151b9b96 | 432 | "Hello"); |
de1c301e LP |
433 | if (r < 0) |
434 | return r; | |
435 | ||
19befb2d | 436 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
437 | } |
438 | ||
a7e3212d | 439 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
440 | assert(bus); |
441 | ||
f08838da | 442 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 443 | bus->state = BUS_HELLO; |
e3017af9 | 444 | return 1; |
de1c301e LP |
445 | } |
446 | ||
447 | bus->state = BUS_RUNNING; | |
e3017af9 | 448 | return 1; |
de1c301e LP |
449 | } |
450 | ||
451 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 452 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
453 | const char *a; |
454 | char *r = NULL; | |
455 | ||
456 | assert(p); | |
457 | assert(*p); | |
de1c301e LP |
458 | assert(value); |
459 | ||
2fd9ae2e LP |
460 | if (key) { |
461 | l = strlen(key); | |
462 | if (strncmp(*p, key, l) != 0) | |
463 | return 0; | |
de1c301e | 464 | |
2fd9ae2e LP |
465 | if ((*p)[l] != '=') |
466 | return 0; | |
de1c301e | 467 | |
2fd9ae2e LP |
468 | if (*value) |
469 | return -EINVAL; | |
de1c301e | 470 | |
2fd9ae2e LP |
471 | a = *p + l + 1; |
472 | } else | |
473 | a = *p; | |
474 | ||
475 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 476 | char c; |
de1c301e LP |
477 | |
478 | if (*a == '%') { | |
479 | int x, y; | |
480 | ||
481 | x = unhexchar(a[1]); | |
482 | if (x < 0) { | |
483 | free(r); | |
484 | return x; | |
485 | } | |
486 | ||
487 | y = unhexchar(a[2]); | |
488 | if (y < 0) { | |
489 | free(r); | |
490 | return y; | |
491 | } | |
492 | ||
de1c301e | 493 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
494 | a += 3; |
495 | } else { | |
de1c301e | 496 | c = *a; |
89ffcd2a LP |
497 | a++; |
498 | } | |
de1c301e | 499 | |
821e0756 | 500 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 501 | return -ENOMEM; |
de1c301e | 502 | |
de1c301e LP |
503 | r[n++] = c; |
504 | } | |
505 | ||
89ffcd2a LP |
506 | if (!r) { |
507 | r = strdup(""); | |
508 | if (!r) | |
509 | return -ENOMEM; | |
510 | } else | |
511 | r[n] = 0; | |
512 | ||
513 | if (*a == ',') | |
514 | a++; | |
515 | ||
de1c301e | 516 | *p = a; |
2fd9ae2e LP |
517 | |
518 | free(*value); | |
de1c301e | 519 | *value = r; |
2fd9ae2e | 520 | |
de1c301e LP |
521 | return 1; |
522 | } | |
523 | ||
524 | static void skip_address_key(const char **p) { | |
525 | assert(p); | |
526 | assert(*p); | |
527 | ||
89ffcd2a LP |
528 | *p += strcspn(*p, ","); |
529 | ||
530 | if (**p == ',') | |
531 | (*p) ++; | |
de1c301e LP |
532 | } |
533 | ||
2fd9ae2e LP |
534 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
535 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
536 | size_t l; | |
de1c301e LP |
537 | int r; |
538 | ||
539 | assert(b); | |
2fd9ae2e LP |
540 | assert(p); |
541 | assert(*p); | |
542 | assert(guid); | |
de1c301e | 543 | |
2fd9ae2e LP |
544 | while (**p != 0 && **p != ';') { |
545 | r = parse_address_key(p, "guid", guid); | |
546 | if (r < 0) | |
547 | return r; | |
548 | else if (r > 0) | |
549 | continue; | |
de1c301e | 550 | |
2fd9ae2e LP |
551 | r = parse_address_key(p, "path", &path); |
552 | if (r < 0) | |
553 | return r; | |
554 | else if (r > 0) | |
555 | continue; | |
de1c301e | 556 | |
2fd9ae2e LP |
557 | r = parse_address_key(p, "abstract", &abstract); |
558 | if (r < 0) | |
559 | return r; | |
560 | else if (r > 0) | |
561 | continue; | |
de1c301e | 562 | |
2fd9ae2e LP |
563 | skip_address_key(p); |
564 | } | |
de1c301e | 565 | |
2fd9ae2e LP |
566 | if (!path && !abstract) |
567 | return -EINVAL; | |
de1c301e | 568 | |
2fd9ae2e LP |
569 | if (path && abstract) |
570 | return -EINVAL; | |
571 | ||
572 | if (path) { | |
573 | l = strlen(path); | |
574 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
575 | return -E2BIG; | |
de1c301e | 576 | |
2fd9ae2e LP |
577 | b->sockaddr.un.sun_family = AF_UNIX; |
578 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
579 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
580 | } else if (abstract) { | |
581 | l = strlen(abstract); | |
582 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
583 | return -E2BIG; | |
584 | ||
585 | b->sockaddr.un.sun_family = AF_UNIX; | |
586 | b->sockaddr.un.sun_path[0] = 0; | |
587 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
588 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
589 | } | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
595 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 596 | int r; |
b92bea5d ZJS |
597 | struct addrinfo *result, hints = { |
598 | .ai_socktype = SOCK_STREAM, | |
599 | .ai_flags = AI_ADDRCONFIG, | |
600 | }; | |
2fd9ae2e LP |
601 | |
602 | assert(b); | |
603 | assert(p); | |
604 | assert(*p); | |
605 | assert(guid); | |
606 | ||
607 | while (**p != 0 && **p != ';') { | |
608 | r = parse_address_key(p, "guid", guid); | |
609 | if (r < 0) | |
610 | return r; | |
611 | else if (r > 0) | |
612 | continue; | |
613 | ||
614 | r = parse_address_key(p, "host", &host); | |
615 | if (r < 0) | |
616 | return r; | |
617 | else if (r > 0) | |
618 | continue; | |
619 | ||
620 | r = parse_address_key(p, "port", &port); | |
621 | if (r < 0) | |
622 | return r; | |
623 | else if (r > 0) | |
624 | continue; | |
625 | ||
626 | r = parse_address_key(p, "family", &family); | |
627 | if (r < 0) | |
628 | return r; | |
629 | else if (r > 0) | |
630 | continue; | |
631 | ||
632 | skip_address_key(p); | |
633 | } | |
634 | ||
635 | if (!host || !port) | |
636 | return -EINVAL; | |
637 | ||
2fd9ae2e LP |
638 | if (family) { |
639 | if (streq(family, "ipv4")) | |
640 | hints.ai_family = AF_INET; | |
641 | else if (streq(family, "ipv6")) | |
642 | hints.ai_family = AF_INET6; | |
643 | else | |
644 | return -EINVAL; | |
645 | } | |
646 | ||
647 | r = getaddrinfo(host, port, &hints, &result); | |
648 | if (r == EAI_SYSTEM) | |
649 | return -errno; | |
650 | else if (r != 0) | |
651 | return -EADDRNOTAVAIL; | |
652 | ||
653 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
654 | b->sockaddr_size = result->ai_addrlen; | |
655 | ||
656 | freeaddrinfo(result); | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
661 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
662 | char *path = NULL; | |
663 | unsigned n_argv = 0, j; | |
664 | char **argv = NULL; | |
821e0756 | 665 | size_t allocated = 0; |
2fd9ae2e LP |
666 | int r; |
667 | ||
668 | assert(b); | |
669 | assert(p); | |
670 | assert(*p); | |
671 | assert(guid); | |
672 | ||
673 | while (**p != 0 && **p != ';') { | |
674 | r = parse_address_key(p, "guid", guid); | |
675 | if (r < 0) | |
676 | goto fail; | |
677 | else if (r > 0) | |
678 | continue; | |
679 | ||
680 | r = parse_address_key(p, "path", &path); | |
681 | if (r < 0) | |
682 | goto fail; | |
683 | else if (r > 0) | |
684 | continue; | |
685 | ||
686 | if (startswith(*p, "argv")) { | |
687 | unsigned ul; | |
688 | ||
689 | errno = 0; | |
690 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 691 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
692 | r = -EINVAL; |
693 | goto fail; | |
694 | } | |
695 | ||
696 | (*p) ++; | |
697 | ||
698 | if (ul >= n_argv) { | |
821e0756 | 699 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
700 | r = -ENOMEM; |
701 | goto fail; | |
702 | } | |
703 | ||
2fd9ae2e LP |
704 | n_argv = ul + 1; |
705 | } | |
706 | ||
707 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 708 | if (r < 0) |
2fd9ae2e | 709 | goto fail; |
de1c301e | 710 | |
2fd9ae2e | 711 | continue; |
de1c301e LP |
712 | } |
713 | ||
2fd9ae2e LP |
714 | skip_address_key(p); |
715 | } | |
de1c301e | 716 | |
5a0f6033 LP |
717 | if (!path) { |
718 | r = -EINVAL; | |
2fd9ae2e | 719 | goto fail; |
5a0f6033 | 720 | } |
de1c301e | 721 | |
2fd9ae2e LP |
722 | /* Make sure there are no holes in the array, with the |
723 | * exception of argv[0] */ | |
724 | for (j = 1; j < n_argv; j++) | |
725 | if (!argv[j]) { | |
726 | r = -EINVAL; | |
727 | goto fail; | |
728 | } | |
729 | ||
730 | if (argv && argv[0] == NULL) { | |
731 | argv[0] = strdup(path); | |
732 | if (!argv[0]) { | |
733 | r = -ENOMEM; | |
734 | goto fail; | |
735 | } | |
736 | } | |
de1c301e | 737 | |
2fd9ae2e LP |
738 | b->exec_path = path; |
739 | b->exec_argv = argv; | |
740 | return 0; | |
de1c301e | 741 | |
2fd9ae2e LP |
742 | fail: |
743 | for (j = 0; j < n_argv; j++) | |
744 | free(argv[j]); | |
745 | ||
746 | free(argv); | |
747 | free(path); | |
748 | return r; | |
749 | } | |
750 | ||
6629161f LP |
751 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
752 | _cleanup_free_ char *path = NULL; | |
753 | int r; | |
754 | ||
755 | assert(b); | |
756 | assert(p); | |
757 | assert(*p); | |
758 | assert(guid); | |
759 | ||
760 | while (**p != 0 && **p != ';') { | |
761 | r = parse_address_key(p, "guid", guid); | |
762 | if (r < 0) | |
763 | return r; | |
764 | else if (r > 0) | |
765 | continue; | |
766 | ||
767 | r = parse_address_key(p, "path", &path); | |
768 | if (r < 0) | |
769 | return r; | |
770 | else if (r > 0) | |
771 | continue; | |
772 | ||
773 | skip_address_key(p); | |
774 | } | |
775 | ||
776 | if (!path) | |
777 | return -EINVAL; | |
778 | ||
779 | free(b->kernel); | |
780 | b->kernel = path; | |
781 | path = NULL; | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
bc9fd78c | 786 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 787 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
788 | int r; |
789 | ||
790 | assert(b); | |
791 | assert(p); | |
792 | assert(*p); | |
793 | assert(guid); | |
794 | ||
795 | while (**p != 0 && **p != ';') { | |
796 | r = parse_address_key(p, "guid", guid); | |
797 | if (r < 0) | |
798 | return r; | |
799 | else if (r > 0) | |
800 | continue; | |
801 | ||
802 | r = parse_address_key(p, "machine", &machine); | |
803 | if (r < 0) | |
804 | return r; | |
805 | else if (r > 0) | |
806 | continue; | |
807 | ||
ee502e0c LP |
808 | r = parse_address_key(p, "pid", &pid); |
809 | if (r < 0) | |
810 | return r; | |
811 | else if (r > 0) | |
812 | continue; | |
813 | ||
a7893c6b LP |
814 | skip_address_key(p); |
815 | } | |
816 | ||
ee502e0c | 817 | if (!machine == !pid) |
a7893c6b LP |
818 | return -EINVAL; |
819 | ||
ee502e0c LP |
820 | if (machine) { |
821 | if (!machine_name_is_valid(machine)) | |
822 | return -EINVAL; | |
b6741478 | 823 | |
ee502e0c LP |
824 | free(b->machine); |
825 | b->machine = machine; | |
826 | machine = NULL; | |
827 | } else { | |
a1e58e8e | 828 | b->machine = mfree(b->machine); |
ee502e0c LP |
829 | } |
830 | ||
831 | if (pid) { | |
832 | r = parse_pid(pid, &b->nspid); | |
833 | if (r < 0) | |
834 | return r; | |
835 | } else | |
836 | b->nspid = 0; | |
a7893c6b LP |
837 | |
838 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
839 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
840 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
841 | |
842 | return 0; | |
843 | } | |
844 | ||
bc9fd78c | 845 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 846 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
847 | int r; |
848 | ||
849 | assert(b); | |
850 | assert(p); | |
851 | assert(*p); | |
852 | assert(guid); | |
853 | ||
854 | while (**p != 0 && **p != ';') { | |
855 | r = parse_address_key(p, "guid", guid); | |
856 | if (r < 0) | |
857 | return r; | |
858 | else if (r > 0) | |
859 | continue; | |
860 | ||
861 | r = parse_address_key(p, "machine", &machine); | |
862 | if (r < 0) | |
863 | return r; | |
864 | else if (r > 0) | |
865 | continue; | |
866 | ||
ee502e0c LP |
867 | r = parse_address_key(p, "pid", &pid); |
868 | if (r < 0) | |
869 | return r; | |
870 | else if (r > 0) | |
871 | continue; | |
872 | ||
bc9fd78c LP |
873 | skip_address_key(p); |
874 | } | |
875 | ||
ee502e0c | 876 | if (!machine == !pid) |
bc9fd78c LP |
877 | return -EINVAL; |
878 | ||
ee502e0c LP |
879 | if (machine) { |
880 | if (!machine_name_is_valid(machine)) | |
881 | return -EINVAL; | |
bc9fd78c | 882 | |
ee502e0c LP |
883 | free(b->machine); |
884 | b->machine = machine; | |
885 | machine = NULL; | |
886 | } else { | |
a1e58e8e | 887 | b->machine = mfree(b->machine); |
ee502e0c LP |
888 | } |
889 | ||
890 | if (pid) { | |
891 | r = parse_pid(pid, &b->nspid); | |
892 | if (r < 0) | |
893 | return r; | |
894 | } else | |
895 | b->nspid = 0; | |
bc9fd78c | 896 | |
2fc09a9c DM |
897 | r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); |
898 | if (r < 0) | |
899 | return r; | |
bc9fd78c LP |
900 | |
901 | return 0; | |
902 | } | |
903 | ||
2fd9ae2e LP |
904 | static void bus_reset_parsed_address(sd_bus *b) { |
905 | assert(b); | |
906 | ||
907 | zero(b->sockaddr); | |
908 | b->sockaddr_size = 0; | |
ba243e51 NK |
909 | b->exec_argv = strv_free(b->exec_argv); |
910 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 911 | b->server_id = SD_ID128_NULL; |
ba243e51 NK |
912 | b->kernel = mfree(b->kernel); |
913 | b->machine = mfree(b->machine); | |
ee502e0c | 914 | b->nspid = 0; |
2fd9ae2e LP |
915 | } |
916 | ||
917 | static int bus_parse_next_address(sd_bus *b) { | |
918 | _cleanup_free_ char *guid = NULL; | |
919 | const char *a; | |
920 | int r; | |
921 | ||
922 | assert(b); | |
923 | ||
924 | if (!b->address) | |
925 | return 0; | |
926 | if (b->address[b->address_index] == 0) | |
927 | return 0; | |
928 | ||
929 | bus_reset_parsed_address(b); | |
930 | ||
931 | a = b->address + b->address_index; | |
de1c301e | 932 | |
2fd9ae2e | 933 | while (*a != 0) { |
de1c301e | 934 | |
2fd9ae2e LP |
935 | if (*a == ';') { |
936 | a++; | |
937 | continue; | |
de1c301e LP |
938 | } |
939 | ||
2fd9ae2e LP |
940 | if (startswith(a, "unix:")) { |
941 | a += 5; | |
de1c301e | 942 | |
2fd9ae2e | 943 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
944 | if (r < 0) |
945 | return r; | |
2fd9ae2e | 946 | break; |
de1c301e | 947 | |
2fd9ae2e | 948 | } else if (startswith(a, "tcp:")) { |
de1c301e | 949 | |
2fd9ae2e LP |
950 | a += 4; |
951 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
952 | if (r < 0) |
953 | return r; | |
de1c301e | 954 | |
2fd9ae2e LP |
955 | break; |
956 | ||
957 | } else if (startswith(a, "unixexec:")) { | |
958 | ||
959 | a += 9; | |
960 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
961 | if (r < 0) |
962 | return r; | |
de1c301e | 963 | |
2fd9ae2e | 964 | break; |
de1c301e | 965 | |
6629161f LP |
966 | } else if (startswith(a, "kernel:")) { |
967 | ||
968 | a += 7; | |
969 | r = parse_kernel_address(b, &a, &guid); | |
970 | if (r < 0) | |
971 | return r; | |
972 | ||
a7893c6b | 973 | break; |
de33fc62 | 974 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 975 | |
146d4773 | 976 | a += 15; |
bc9fd78c LP |
977 | r = parse_container_unix_address(b, &a, &guid); |
978 | if (r < 0) | |
979 | return r; | |
980 | ||
981 | break; | |
de33fc62 | 982 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 983 | |
146d4773 | 984 | a += 17; |
bc9fd78c | 985 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
986 | if (r < 0) |
987 | return r; | |
988 | ||
6629161f | 989 | break; |
de1c301e LP |
990 | } |
991 | ||
2fd9ae2e LP |
992 | a = strchr(a, ';'); |
993 | if (!a) | |
994 | return 0; | |
de1c301e LP |
995 | } |
996 | ||
997 | if (guid) { | |
98178d39 | 998 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
999 | if (r < 0) |
1000 | return r; | |
1001 | } | |
1002 | ||
2fd9ae2e | 1003 | b->address_index = a - b->address; |
de1c301e LP |
1004 | return 1; |
1005 | } | |
1006 | ||
a7e3212d | 1007 | static int bus_start_address(sd_bus *b) { |
15442912 DH |
1008 | bool container_kdbus_available = false; |
1009 | bool kdbus_available = false; | |
2fd9ae2e LP |
1010 | int r; |
1011 | ||
1012 | assert(b); | |
1013 | ||
1014 | for (;;) { | |
1e05d493 | 1015 | bool skipped = false; |
2fd9ae2e | 1016 | |
1e05d493 | 1017 | bus_close_fds(b); |
a7e3212d | 1018 | |
15442912 DH |
1019 | /* |
1020 | * Usually, if you provide multiple different bus-addresses, we | |
1021 | * try all of them in order. We use the first one that | |
1022 | * succeeds. However, if you mix kernel and unix addresses, we | |
1023 | * never try unix-addresses if a previous kernel address was | |
1024 | * tried and kdbus was available. This is required to prevent | |
1025 | * clients to fallback to the bus-proxy if kdbus is available | |
1026 | * but failed (eg., too many connections). | |
1027 | */ | |
1028 | ||
1e05d493 | 1029 | if (b->exec_path) |
a7893c6b | 1030 | r = bus_socket_exec(b); |
15442912 | 1031 | else if ((b->nspid > 0 || b->machine) && b->kernel) { |
bc9fd78c | 1032 | r = bus_container_connect_kernel(b); |
15442912 DH |
1033 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1034 | container_kdbus_available = true; | |
751090cc LP |
1035 | |
1036 | } else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1037 | if (!container_kdbus_available) | |
1038 | r = bus_container_connect_socket(b); | |
1039 | else | |
1040 | skipped = true; | |
1041 | ||
1042 | } else if (b->kernel) { | |
a7893c6b | 1043 | r = bus_kernel_connect(b); |
15442912 DH |
1044 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1045 | kdbus_available = true; | |
751090cc LP |
1046 | |
1047 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1048 | if (!kdbus_available) | |
1049 | r = bus_socket_connect(b); | |
1050 | else | |
1051 | skipped = true; | |
751090cc | 1052 | } else |
1e05d493 LP |
1053 | skipped = true; |
1054 | ||
1055 | if (!skipped) { | |
1056 | if (r >= 0) { | |
1057 | r = attach_io_events(b); | |
1058 | if (r >= 0) | |
1059 | return r; | |
1060 | } | |
6629161f | 1061 | |
2fd9ae2e LP |
1062 | b->last_connect_error = -r; |
1063 | } | |
1064 | ||
1065 | r = bus_parse_next_address(b); | |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | if (r == 0) | |
1069 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1070 | } |
1071 | } | |
1072 | ||
a7e3212d LP |
1073 | int bus_next_address(sd_bus *b) { |
1074 | assert(b); | |
1075 | ||
1076 | bus_reset_parsed_address(b); | |
1077 | return bus_start_address(b); | |
1078 | } | |
1079 | ||
021a1e78 | 1080 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1081 | struct stat st; |
021a1e78 LP |
1082 | int r; |
1083 | ||
1084 | assert(b); | |
e82c9509 LP |
1085 | assert(b->input_fd >= 0); |
1086 | assert(b->output_fd >= 0); | |
021a1e78 | 1087 | |
e82c9509 | 1088 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1089 | if (r < 0) |
1090 | return r; | |
1091 | ||
e82c9509 | 1092 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1093 | if (r < 0) |
1094 | return r; | |
1095 | ||
e82c9509 LP |
1096 | if (b->input_fd != b->output_fd) { |
1097 | r = fd_nonblock(b->output_fd, true); | |
1098 | if (r < 0) | |
1099 | return r; | |
1100 | ||
1101 | r = fd_cloexec(b->output_fd, true); | |
1102 | if (r < 0) | |
1103 | return r; | |
1104 | } | |
1105 | ||
6629161f LP |
1106 | if (fstat(b->input_fd, &st) < 0) |
1107 | return -errno; | |
1108 | ||
1109 | if (S_ISCHR(b->input_fd)) | |
1110 | return bus_kernel_take_fd(b); | |
1111 | else | |
1112 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1113 | } |
1114 | ||
d9f644e2 | 1115 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1116 | int r; |
1117 | ||
d6888822 LP |
1118 | assert_return(bus, -EINVAL); |
1119 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1120 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1121 | |
1122 | bus->state = BUS_OPENING; | |
1123 | ||
2181a7f5 LP |
1124 | if (bus->is_server && bus->bus_client) |
1125 | return -EINVAL; | |
1126 | ||
e82c9509 | 1127 | if (bus->input_fd >= 0) |
021a1e78 | 1128 | r = bus_start_fd(bus); |
a7893c6b | 1129 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1130 | r = bus_start_address(bus); |
021a1e78 LP |
1131 | else |
1132 | return -EINVAL; | |
1133 | ||
db9bb83f LP |
1134 | if (r < 0) { |
1135 | sd_bus_close(bus); | |
021a1e78 | 1136 | return r; |
db9bb83f | 1137 | } |
021a1e78 LP |
1138 | |
1139 | return bus_send_hello(bus); | |
1140 | } | |
1141 | ||
af08d2f9 LP |
1142 | _public_ int sd_bus_open(sd_bus **ret) { |
1143 | const char *e; | |
1144 | sd_bus *b; | |
1145 | int r; | |
1146 | ||
1147 | assert_return(ret, -EINVAL); | |
1148 | ||
1149 | /* Let's connect to the starter bus if it is set, and | |
1150 | * otherwise to the bus that is appropropriate for the scope | |
1151 | * we are running in */ | |
1152 | ||
1153 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1154 | if (e) { | |
1155 | if (streq(e, "system")) | |
1156 | return sd_bus_open_system(ret); | |
09365592 | 1157 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1158 | return sd_bus_open_user(ret); |
1159 | } | |
1160 | ||
1161 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1162 | if (!e) { | |
1163 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1164 | return sd_bus_open_user(ret); | |
1165 | else | |
1166 | return sd_bus_open_system(ret); | |
1167 | } | |
1168 | ||
1169 | r = sd_bus_new(&b); | |
1170 | if (r < 0) | |
1171 | return r; | |
1172 | ||
1173 | r = sd_bus_set_address(b, e); | |
1174 | if (r < 0) | |
1175 | goto fail; | |
1176 | ||
1177 | b->bus_client = true; | |
1178 | ||
1179 | /* We don't know whether the bus is trusted or not, so better | |
1180 | * be safe, and authenticate everything */ | |
1181 | b->trusted = false; | |
cf226cfc LP |
1182 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1183 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1184 | |
1185 | r = sd_bus_start(b); | |
1186 | if (r < 0) | |
1187 | goto fail; | |
1188 | ||
1189 | *ret = b; | |
1190 | return 0; | |
1191 | ||
1192 | fail: | |
1193 | bus_free(b); | |
1194 | return r; | |
1195 | } | |
1196 | ||
09365592 | 1197 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1198 | const char *e; |
09365592 LP |
1199 | assert(b); |
1200 | ||
1201 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1202 | if (e) | |
1203 | return sd_bus_set_address(b, e); | |
1204 | ||
057171ef | 1205 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1206 | } |
1207 | ||
1208 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1209 | sd_bus *b; |
1210 | int r; | |
1211 | ||
d6888822 | 1212 | assert_return(ret, -EINVAL); |
de1c301e | 1213 | |
021a1e78 LP |
1214 | r = sd_bus_new(&b); |
1215 | if (r < 0) | |
1216 | return r; | |
1217 | ||
09365592 | 1218 | r = bus_set_address_system(b); |
e3dd987c LP |
1219 | if (r < 0) |
1220 | goto fail; | |
de1c301e | 1221 | |
94bbf1ba | 1222 | b->bus_client = true; |
5972fe95 | 1223 | b->is_system = true; |
021a1e78 | 1224 | |
adacb957 LP |
1225 | /* Let's do per-method access control on the system bus. We |
1226 | * need the caller's UID and capability set for that. */ | |
1227 | b->trusted = false; | |
1228 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1229 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1230 | |
021a1e78 LP |
1231 | r = sd_bus_start(b); |
1232 | if (r < 0) | |
1233 | goto fail; | |
de1c301e LP |
1234 | |
1235 | *ret = b; | |
1236 | return 0; | |
021a1e78 LP |
1237 | |
1238 | fail: | |
1239 | bus_free(b); | |
1240 | return r; | |
de1c301e LP |
1241 | } |
1242 | ||
09365592 | 1243 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1244 | const char *e; |
64ce4ad7 DH |
1245 | uid_t uid; |
1246 | int r; | |
de1c301e | 1247 | |
09365592 | 1248 | assert(b); |
021a1e78 | 1249 | |
6c03089c | 1250 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1251 | if (e) |
1252 | return sd_bus_set_address(b, e); | |
1253 | ||
64ce4ad7 DH |
1254 | r = cg_pid_get_owner_uid(0, &uid); |
1255 | if (r < 0) | |
1256 | uid = getuid(); | |
1257 | ||
09365592 | 1258 | e = secure_getenv("XDG_RUNTIME_DIR"); |
057171ef | 1259 | if (e) { |
09365592 | 1260 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1261 | |
09365592 LP |
1262 | ee = bus_address_escape(e); |
1263 | if (!ee) | |
1264 | return -ENOMEM; | |
e3dd987c | 1265 | |
64ce4ad7 | 1266 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, uid, ee); |
057171ef | 1267 | } else |
64ce4ad7 | 1268 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, uid); |
de1c301e | 1269 | |
09365592 LP |
1270 | if (!b->address) |
1271 | return -ENOMEM; | |
1272 | ||
1273 | return 0; | |
1274 | } | |
1275 | ||
1276 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1277 | sd_bus *b; | |
1278 | int r; | |
1279 | ||
1280 | assert_return(ret, -EINVAL); | |
1281 | ||
1282 | r = sd_bus_new(&b); | |
1283 | if (r < 0) | |
1284 | return r; | |
1285 | ||
1286 | r = bus_set_address_user(b); | |
1287 | if (r < 0) | |
1288 | return r; | |
1289 | ||
94bbf1ba | 1290 | b->bus_client = true; |
5972fe95 | 1291 | b->is_user = true; |
de1c301e | 1292 | |
adacb957 LP |
1293 | /* We don't do any per-method access control on the user |
1294 | * bus. */ | |
1295 | b->trusted = true; | |
1296 | ||
021a1e78 | 1297 | r = sd_bus_start(b); |
2571ead1 LP |
1298 | if (r < 0) |
1299 | goto fail; | |
de1c301e LP |
1300 | |
1301 | *ret = b; | |
1302 | return 0; | |
2571ead1 LP |
1303 | |
1304 | fail: | |
021a1e78 | 1305 | bus_free(b); |
2571ead1 | 1306 | return r; |
de1c301e LP |
1307 | } |
1308 | ||
09365592 | 1309 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1310 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1311 | char *m = NULL, *c = NULL; |
0f8bd8de | 1312 | |
09365592 LP |
1313 | assert(b); |
1314 | assert(host); | |
0f8bd8de | 1315 | |
7f0d207d LP |
1316 | /* Let's see if we shall enter some container */ |
1317 | m = strchr(host, ':'); | |
1318 | if (m) { | |
1319 | m++; | |
1320 | ||
1321 | /* Let's make sure this is not a port of some kind, | |
1322 | * and is a valid machine name. */ | |
1323 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1324 | char *t; | |
1325 | ||
1326 | /* Cut out the host part */ | |
1327 | t = strndupa(host, m - host - 1); | |
1328 | e = bus_address_escape(t); | |
1329 | if (!e) | |
1330 | return -ENOMEM; | |
1331 | ||
63c372cb | 1332 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1333 | } |
1334 | } | |
1335 | ||
1336 | if (!e) { | |
1337 | e = bus_address_escape(host); | |
1338 | if (!e) | |
1339 | return -ENOMEM; | |
1340 | } | |
0f8bd8de | 1341 | |
7f0d207d | 1342 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1343 | if (!b->address) |
0f8bd8de | 1344 | return -ENOMEM; |
a7893c6b | 1345 | |
09365592 LP |
1346 | return 0; |
1347 | } | |
1348 | ||
1349 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1350 | sd_bus *bus; | |
1351 | int r; | |
1352 | ||
1353 | assert_return(host, -EINVAL); | |
1354 | assert_return(ret, -EINVAL); | |
1355 | ||
a7893c6b | 1356 | r = sd_bus_new(&bus); |
09365592 | 1357 | if (r < 0) |
a7893c6b | 1358 | return r; |
a7893c6b | 1359 | |
09365592 LP |
1360 | r = bus_set_address_system_remote(bus, host); |
1361 | if (r < 0) | |
1362 | goto fail; | |
1363 | ||
a7893c6b | 1364 | bus->bus_client = true; |
09365592 | 1365 | bus->trusted = false; |
3acc1daf | 1366 | bus->is_system = true; |
a7893c6b LP |
1367 | |
1368 | r = sd_bus_start(bus); | |
09365592 LP |
1369 | if (r < 0) |
1370 | goto fail; | |
a7893c6b LP |
1371 | |
1372 | *ret = bus; | |
1373 | return 0; | |
09365592 LP |
1374 | |
1375 | fail: | |
1376 | bus_free(bus); | |
1377 | return r; | |
a7893c6b LP |
1378 | } |
1379 | ||
de33fc62 | 1380 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1381 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1382 | |
09365592 LP |
1383 | assert(b); |
1384 | assert(machine); | |
a7893c6b LP |
1385 | |
1386 | e = bus_address_escape(machine); | |
1387 | if (!e) | |
1388 | return -ENOMEM; | |
1389 | ||
de33fc62 | 1390 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
09365592 | 1391 | if (!b->address) |
a7893c6b | 1392 | return -ENOMEM; |
0f8bd8de | 1393 | |
09365592 LP |
1394 | return 0; |
1395 | } | |
1396 | ||
de33fc62 | 1397 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1398 | sd_bus *bus; |
1399 | int r; | |
1400 | ||
1401 | assert_return(machine, -EINVAL); | |
1402 | assert_return(ret, -EINVAL); | |
affcf189 | 1403 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1404 | |
0f8bd8de | 1405 | r = sd_bus_new(&bus); |
09365592 | 1406 | if (r < 0) |
0f8bd8de | 1407 | return r; |
0f8bd8de | 1408 | |
de33fc62 | 1409 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1410 | if (r < 0) |
1411 | goto fail; | |
1412 | ||
0f8bd8de | 1413 | bus->bus_client = true; |
09365592 | 1414 | bus->trusted = false; |
3acc1daf | 1415 | bus->is_system = true; |
0f8bd8de LP |
1416 | |
1417 | r = sd_bus_start(bus); | |
09365592 LP |
1418 | if (r < 0) |
1419 | goto fail; | |
0f8bd8de LP |
1420 | |
1421 | *ret = bus; | |
1422 | return 0; | |
09365592 LP |
1423 | |
1424 | fail: | |
1425 | bus_free(bus); | |
1426 | return r; | |
0f8bd8de LP |
1427 | } |
1428 | ||
d9f644e2 | 1429 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1430 | |
de1c301e LP |
1431 | if (!bus) |
1432 | return; | |
d5a2b9a6 LP |
1433 | if (bus->state == BUS_CLOSED) |
1434 | return; | |
1435 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1436 | return; |
1437 | ||
1438 | bus->state = BUS_CLOSED; | |
e82c9509 | 1439 | |
40ca29a1 LP |
1440 | sd_bus_detach_event(bus); |
1441 | ||
0e586eae LP |
1442 | /* Drop all queued messages so that they drop references to |
1443 | * the bus object and the bus may be freed */ | |
1444 | bus_reset_queues(bus); | |
1445 | ||
f54514f3 LP |
1446 | if (!bus->is_kernel) |
1447 | bus_close_fds(bus); | |
1448 | ||
1449 | /* We'll leave the fd open in case this is a kernel bus, since | |
1450 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1451 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1452 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1453 | } |
1454 | ||
03976f7b LP |
1455 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1456 | ||
1457 | if (!bus) | |
1458 | return NULL; | |
1459 | ||
1460 | sd_bus_flush(bus); | |
1461 | sd_bus_close(bus); | |
1462 | ||
1463 | return sd_bus_unref(bus); | |
1464 | } | |
1465 | ||
718db961 LP |
1466 | static void bus_enter_closing(sd_bus *bus) { |
1467 | assert(bus); | |
1468 | ||
1469 | if (bus->state != BUS_OPENING && | |
1470 | bus->state != BUS_AUTHENTICATING && | |
1471 | bus->state != BUS_HELLO && | |
1472 | bus->state != BUS_RUNNING) | |
1473 | return; | |
1474 | ||
1475 | bus->state = BUS_CLOSING; | |
1476 | } | |
1477 | ||
d9f644e2 | 1478 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1479 | assert_return(bus, NULL); |
de1c301e | 1480 | |
e4ee6e5c | 1481 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1482 | |
de1c301e LP |
1483 | return bus; |
1484 | } | |
1485 | ||
d9f644e2 | 1486 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1487 | unsigned i; |
5b1bc83f LP |
1488 | |
1489 | if (!bus) | |
1490 | return NULL; | |
de1c301e | 1491 | |
f389bf15 LP |
1492 | i = REFCNT_DEC(bus->n_ref); |
1493 | if (i > 0) | |
1494 | return NULL; | |
1495 | ||
1496 | bus_free(bus); | |
de1c301e LP |
1497 | return NULL; |
1498 | } | |
1499 | ||
d9f644e2 | 1500 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1501 | |
1502 | assert_return(bus, -EINVAL); | |
1503 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1504 | |
f54514f3 | 1505 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1506 | } |
1507 | ||
d9f644e2 | 1508 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1509 | int r; |
1510 | ||
d6888822 LP |
1511 | assert_return(bus, -EINVAL); |
1512 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1513 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1514 | |
09365592 LP |
1515 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1516 | return 0; | |
1517 | ||
d728d708 | 1518 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1519 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1520 | return 0; |
1521 | ||
20902f3e | 1522 | r = bus_ensure_running(bus); |
d728d708 LP |
1523 | if (r < 0) |
1524 | return r; | |
de1c301e | 1525 | |
d728d708 LP |
1526 | return bus->can_fds; |
1527 | } | |
1528 | ||
1529 | return bus_type_is_valid(type); | |
de1c301e LP |
1530 | } |
1531 | ||
5c302692 | 1532 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1533 | int r; |
de1c301e | 1534 | |
d6888822 | 1535 | assert_return(bus, -EINVAL); |
f7fce345 | 1536 | assert_return(id, -EINVAL); |
d6888822 | 1537 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1538 | |
20902f3e | 1539 | r = bus_ensure_running(bus); |
d728d708 LP |
1540 | if (r < 0) |
1541 | return r; | |
de1c301e | 1542 | |
f7fce345 | 1543 | *id = bus->server_id; |
d728d708 | 1544 | return 0; |
de1c301e LP |
1545 | } |
1546 | ||
3df7a7e6 | 1547 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1548 | assert(b); |
de1c301e LP |
1549 | assert(m); |
1550 | ||
aea93deb LP |
1551 | if (m->sealed) { |
1552 | /* If we copy the same message to multiple | |
693eb9a2 | 1553 | * destinations, avoid using the same cookie |
aea93deb | 1554 | * numbers. */ |
693eb9a2 | 1555 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1556 | return 0; |
aea93deb | 1557 | } |
de1c301e | 1558 | |
3df7a7e6 LP |
1559 | if (timeout == 0) |
1560 | timeout = BUS_DEFAULT_TIMEOUT; | |
1561 | ||
693eb9a2 | 1562 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1563 | } |
1564 | ||
e1c433c6 | 1565 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1566 | bool remarshal = false; |
1567 | ||
e1c433c6 LP |
1568 | assert(b); |
1569 | ||
908b8a42 DH |
1570 | /* wrong packet version */ |
1571 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1572 | remarshal = true; | |
1573 | ||
1574 | /* wrong packet endianness */ | |
1575 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1576 | remarshal = true; | |
1577 | ||
1578 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1579 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1580 | * force remarshaling of the message. Technically, we could just | |
1581 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1582 | * the message refer to m->kdbus already. This should be fixed! */ | |
1583 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1584 | remarshal = true; | |
e1c433c6 | 1585 | |
908b8a42 | 1586 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1587 | } |
1588 | ||
7adc46fc LP |
1589 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1590 | assert(b); | |
1591 | assert(m); | |
1592 | ||
52cd5877 LP |
1593 | /* Fake some timestamps, if they were requested, and not |
1594 | * already initialized */ | |
1595 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1596 | if (m->realtime <= 0) | |
1597 | m->realtime = now(CLOCK_REALTIME); | |
1598 | ||
1599 | if (m->monotonic <= 0) | |
1600 | m->monotonic = now(CLOCK_MONOTONIC); | |
1601 | } | |
1602 | ||
7adc46fc LP |
1603 | /* The bus specification says the serial number cannot be 0, |
1604 | * hence let's fill something in for synthetic messages. Since | |
1605 | * synthetic messages might have a fake sender and we don't | |
1606 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1607 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1608 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1609 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1610 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1611 | } |
1612 | ||
069f5e61 | 1613 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1614 | int r; |
1615 | ||
718db961 | 1616 | assert(bus); |
2e3db52d | 1617 | assert(m); |
718db961 LP |
1618 | |
1619 | if (bus->is_kernel) | |
069f5e61 | 1620 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1621 | else |
2e3db52d LP |
1622 | r = bus_socket_write_message(bus, m, idx); |
1623 | ||
1624 | if (r <= 0) | |
1625 | return r; | |
1626 | ||
90911bb6 | 1627 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1628 | log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", |
2e3db52d LP |
1629 | bus_message_type_to_string(m->header->type), |
1630 | strna(sd_bus_message_get_sender(m)), | |
1631 | strna(sd_bus_message_get_destination(m)), | |
1632 | strna(sd_bus_message_get_path(m)), | |
1633 | strna(sd_bus_message_get_interface(m)), | |
1634 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1635 | BUS_MESSAGE_COOKIE(m), |
1636 | m->reply_cookie, | |
2e3db52d LP |
1637 | strna(m->error.message)); |
1638 | ||
1639 | return r; | |
718db961 LP |
1640 | } |
1641 | ||
de1c301e | 1642 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1643 | int r, ret = 0; |
de1c301e LP |
1644 | |
1645 | assert(bus); | |
89ffcd2a | 1646 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1647 | |
de1c301e LP |
1648 | while (bus->wqueue_size > 0) { |
1649 | ||
069f5e61 | 1650 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1651 | if (r < 0) |
de1c301e | 1652 | return r; |
718db961 | 1653 | else if (r == 0) |
e3017af9 LP |
1654 | /* Didn't do anything this time */ |
1655 | return ret; | |
6629161f | 1656 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1657 | /* Fully written. Let's drop the entry from |
1658 | * the queue. | |
1659 | * | |
1660 | * This isn't particularly optimized, but | |
1661 | * well, this is supposed to be our worst-case | |
1662 | * buffer only, and the socket buffer is | |
1663 | * supposed to be our primary buffer, and if | |
1664 | * it got full, then all bets are off | |
1665 | * anyway. */ | |
1666 | ||
de1c301e | 1667 | bus->wqueue_size --; |
c4e6e242 | 1668 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1669 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1670 | bus->windex = 0; | |
1671 | ||
e3017af9 | 1672 | ret = 1; |
de1c301e LP |
1673 | } |
1674 | } | |
1675 | ||
e3017af9 | 1676 | return ret; |
de1c301e LP |
1677 | } |
1678 | ||
766c5809 | 1679 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1680 | assert(bus); |
1681 | ||
1682 | if (bus->is_kernel) | |
766c5809 | 1683 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1684 | else |
1685 | return bus_socket_read_message(bus); | |
1686 | } | |
1687 | ||
7adc46fc | 1688 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1689 | assert(bus); |
7d22c717 | 1690 | |
821e0756 | 1691 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1692 | return -ENOBUFS; |
1693 | ||
821e0756 | 1694 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1695 | return -ENOMEM; |
1696 | ||
7d22c717 LP |
1697 | return 0; |
1698 | } | |
1699 | ||
766c5809 | 1700 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1701 | int r, ret = 0; |
de1c301e LP |
1702 | |
1703 | assert(bus); | |
1704 | assert(m); | |
89ffcd2a | 1705 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1706 | |
766c5809 LP |
1707 | /* Note that the priority logic is only available on kdbus, |
1708 | * where the rqueue is unused. We check the rqueue here | |
1709 | * anyway, because it's simple... */ | |
1710 | ||
7d22c717 LP |
1711 | for (;;) { |
1712 | if (bus->rqueue_size > 0) { | |
1713 | /* Dispatch a queued message */ | |
de1c301e | 1714 | |
7d22c717 LP |
1715 | *m = bus->rqueue[0]; |
1716 | bus->rqueue_size --; | |
1717 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1718 | return 1; | |
1719 | } | |
de1c301e | 1720 | |
7d22c717 | 1721 | /* Try to read a new message */ |
766c5809 | 1722 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1723 | if (r < 0) |
e3017af9 | 1724 | return r; |
e3017af9 LP |
1725 | if (r == 0) |
1726 | return ret; | |
de1c301e | 1727 | |
2e8d788c | 1728 | ret = 1; |
7d22c717 | 1729 | } |
de1c301e LP |
1730 | } |
1731 | ||
069f5e61 | 1732 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1733 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1734 | int r; |
1735 | ||
d6888822 | 1736 | assert_return(m, -EINVAL); |
9030ca46 LP |
1737 | |
1738 | if (!bus) | |
1739 | bus = m->bus; | |
1740 | ||
d6888822 | 1741 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1742 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1743 | |
a3d59cd1 LP |
1744 | if (!BUS_IS_OPEN(bus->state)) |
1745 | return -ENOTCONN; | |
1746 | ||
021a1e78 LP |
1747 | if (m->n_fds > 0) { |
1748 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1749 | if (r < 0) | |
1750 | return r; | |
1751 | if (r == 0) | |
15411c0c | 1752 | return -EOPNOTSUPP; |
021a1e78 | 1753 | } |
de1c301e | 1754 | |
693eb9a2 | 1755 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1756 | * is expected */ |
693eb9a2 | 1757 | if (!cookie && !m->sealed) |
0461f8cd | 1758 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1759 | |
3df7a7e6 | 1760 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1761 | if (r < 0) |
1762 | return r; | |
1763 | ||
441d56a1 | 1764 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1765 | * message and place a replacement in m */ |
1766 | r = bus_remarshal_message(bus, &m); | |
1767 | if (r < 0) | |
1768 | return r; | |
1769 | ||
5407f2de LP |
1770 | /* If this is a reply and no reply was requested, then let's |
1771 | * suppress this, if we can */ | |
997eadb5 LP |
1772 | if (m->dont_send) |
1773 | goto finish; | |
5407f2de | 1774 | |
89ffcd2a | 1775 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1776 | size_t idx = 0; |
1777 | ||
069f5e61 | 1778 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1779 | if (r < 0) { |
441d56a1 | 1780 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1781 | bus_enter_closing(bus); |
441d56a1 LP |
1782 | return -ECONNRESET; |
1783 | } | |
32f46480 | 1784 | |
de1c301e | 1785 | return r; |
997eadb5 LP |
1786 | } |
1787 | ||
1788 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1789 | /* Wasn't fully written. So let's remember how |
1790 | * much was written. Note that the first entry | |
1791 | * of the wqueue array is always allocated so | |
1792 | * that we always can remember how much was | |
1793 | * written. */ | |
1794 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1795 | bus->wqueue_size = 1; | |
1796 | bus->windex = idx; | |
1797 | } | |
997eadb5 | 1798 | |
de1c301e | 1799 | } else { |
de1c301e LP |
1800 | /* Just append it to the queue. */ |
1801 | ||
25220239 | 1802 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1803 | return -ENOBUFS; |
1804 | ||
821e0756 | 1805 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1806 | return -ENOMEM; |
1807 | ||
821e0756 | 1808 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1809 | } |
1810 | ||
997eadb5 | 1811 | finish: |
693eb9a2 LP |
1812 | if (cookie) |
1813 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1814 | |
7a37d625 | 1815 | return 1; |
de1c301e LP |
1816 | } |
1817 | ||
069f5e61 LP |
1818 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1819 | return bus_send_internal(bus, m, cookie, false); | |
1820 | } | |
1821 | ||
693eb9a2 | 1822 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1823 | int r; |
1824 | ||
911121a7 | 1825 | assert_return(m, -EINVAL); |
9030ca46 LP |
1826 | |
1827 | if (!bus) | |
1828 | bus = m->bus; | |
1829 | ||
911121a7 LP |
1830 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1831 | ||
a3d59cd1 LP |
1832 | if (!BUS_IS_OPEN(bus->state)) |
1833 | return -ENOTCONN; | |
1834 | ||
911121a7 LP |
1835 | if (!streq_ptr(m->destination, destination)) { |
1836 | ||
1837 | if (!destination) | |
1838 | return -EEXIST; | |
1839 | ||
1840 | r = sd_bus_message_set_destination(m, destination); | |
1841 | if (r < 0) | |
1842 | return r; | |
1843 | } | |
1844 | ||
693eb9a2 | 1845 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1846 | } |
1847 | ||
de1c301e LP |
1848 | static usec_t calc_elapse(uint64_t usec) { |
1849 | if (usec == (uint64_t) -1) | |
1850 | return 0; | |
1851 | ||
de1c301e LP |
1852 | return now(CLOCK_MONOTONIC) + usec; |
1853 | } | |
1854 | ||
e3017af9 LP |
1855 | static int timeout_compare(const void *a, const void *b) { |
1856 | const struct reply_callback *x = a, *y = b; | |
1857 | ||
1858 | if (x->timeout != 0 && y->timeout == 0) | |
1859 | return -1; | |
1860 | ||
1861 | if (x->timeout == 0 && y->timeout != 0) | |
1862 | return 1; | |
1863 | ||
1864 | if (x->timeout < y->timeout) | |
1865 | return -1; | |
1866 | ||
1867 | if (x->timeout > y->timeout) | |
1868 | return 1; | |
1869 | ||
1870 | return 0; | |
1871 | } | |
1872 | ||
c49b30a2 | 1873 | _public_ int sd_bus_call_async( |
de1c301e | 1874 | sd_bus *bus, |
19befb2d | 1875 | sd_bus_slot **slot, |
e1c433c6 | 1876 | sd_bus_message *_m, |
52f3ba91 | 1877 | sd_bus_message_handler_t callback, |
de1c301e | 1878 | void *userdata, |
19befb2d | 1879 | uint64_t usec) { |
de1c301e | 1880 | |
e1c433c6 | 1881 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1882 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1883 | int r; |
1884 | ||
d6888822 | 1885 | assert_return(m, -EINVAL); |
40ca29a1 | 1886 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1887 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1888 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1889 | |
1890 | if (!bus) | |
1891 | bus = m->bus; | |
1892 | ||
d6888822 | 1893 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1894 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1895 | |
a3d59cd1 LP |
1896 | if (!BUS_IS_OPEN(bus->state)) |
1897 | return -ENOTCONN; | |
1898 | ||
c9fe4af7 | 1899 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1900 | if (r < 0) |
1901 | return r; | |
de1c301e | 1902 | |
3df7a7e6 LP |
1903 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1904 | if (r < 0) | |
1905 | return r; | |
e3017af9 | 1906 | |
3df7a7e6 | 1907 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1908 | if (r < 0) |
1909 | return r; | |
1910 | ||
e1c433c6 LP |
1911 | r = bus_remarshal_message(bus, &m); |
1912 | if (r < 0) | |
1913 | return r; | |
1914 | ||
19befb2d LP |
1915 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1916 | if (!s) | |
de1c301e LP |
1917 | return -ENOMEM; |
1918 | ||
19befb2d | 1919 | s->reply_callback.callback = callback; |
de1c301e | 1920 | |
19befb2d | 1921 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1922 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1923 | if (r < 0) { |
19befb2d | 1924 | s->reply_callback.cookie = 0; |
de1c301e LP |
1925 | return r; |
1926 | } | |
1927 | ||
19befb2d LP |
1928 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1929 | if (s->reply_callback.timeout != 0) { | |
1930 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1931 | if (r < 0) { |
19befb2d | 1932 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1933 | return r; |
1934 | } | |
1935 | } | |
1936 | ||
19befb2d LP |
1937 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1938 | if (r < 0) | |
de1c301e | 1939 | return r; |
de1c301e | 1940 | |
19befb2d LP |
1941 | if (slot) |
1942 | *slot = s; | |
1943 | s = NULL; | |
e3017af9 | 1944 | |
19befb2d | 1945 | return r; |
de1c301e LP |
1946 | } |
1947 | ||
20902f3e | 1948 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1949 | int r; |
1950 | ||
1951 | assert(bus); | |
1952 | ||
718db961 | 1953 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1954 | return -ENOTCONN; |
d728d708 LP |
1955 | if (bus->state == BUS_RUNNING) |
1956 | return 1; | |
89ffcd2a LP |
1957 | |
1958 | for (;;) { | |
1959 | r = sd_bus_process(bus, NULL); | |
1960 | if (r < 0) | |
1961 | return r; | |
d728d708 LP |
1962 | if (bus->state == BUS_RUNNING) |
1963 | return 1; | |
e3017af9 LP |
1964 | if (r > 0) |
1965 | continue; | |
89ffcd2a LP |
1966 | |
1967 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1968 | if (r < 0) | |
1969 | return r; | |
1970 | } | |
1971 | } | |
1972 | ||
97f82db3 | 1973 | _public_ int sd_bus_call( |
de1c301e | 1974 | sd_bus *bus, |
97f82db3 | 1975 | sd_bus_message *_m, |
de1c301e LP |
1976 | uint64_t usec, |
1977 | sd_bus_error *error, | |
1978 | sd_bus_message **reply) { | |
1979 | ||
97f82db3 | 1980 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1981 | usec_t timeout; |
693eb9a2 | 1982 | uint64_t cookie; |
7d22c717 LP |
1983 | unsigned i; |
1984 | int r; | |
de1c301e | 1985 | |
759e02e7 LP |
1986 | bus_assert_return(m, -EINVAL, error); |
1987 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
1988 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
1989 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
1990 | |
1991 | if (!bus) | |
1992 | bus = m->bus; | |
1993 | ||
759e02e7 LP |
1994 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
1995 | bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error); | |
97f82db3 | 1996 | |
759e02e7 LP |
1997 | if (!BUS_IS_OPEN(bus->state)) { |
1998 | r = -ENOTCONN; | |
1999 | goto fail; | |
2000 | } | |
a3d59cd1 | 2001 | |
97f82db3 KS |
2002 | r = bus_ensure_running(bus); |
2003 | if (r < 0) | |
759e02e7 | 2004 | goto fail; |
97f82db3 | 2005 | |
a43b9ca3 | 2006 | i = bus->rqueue_size; |
97f82db3 KS |
2007 | |
2008 | r = bus_seal_message(bus, m, usec); | |
2009 | if (r < 0) | |
759e02e7 | 2010 | goto fail; |
97f82db3 KS |
2011 | |
2012 | r = bus_remarshal_message(bus, &m); | |
2013 | if (r < 0) | |
759e02e7 | 2014 | goto fail; |
97f82db3 | 2015 | |
069f5e61 | 2016 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e | 2017 | if (r < 0) |
759e02e7 | 2018 | goto fail; |
de1c301e | 2019 | |
3df7a7e6 | 2020 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
2021 | |
2022 | for (;;) { | |
2023 | usec_t left; | |
de1c301e | 2024 | |
7d22c717 LP |
2025 | while (i < bus->rqueue_size) { |
2026 | sd_bus_message *incoming = NULL; | |
2027 | ||
2028 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2029 | |
693eb9a2 | 2030 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2031 | /* Found a match! */ |
2032 | ||
7d22c717 LP |
2033 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2034 | bus->rqueue_size--; | |
f9f97ca6 | 2035 | log_debug_bus_message(incoming); |
7d22c717 | 2036 | |
40ca29a1 | 2037 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2038 | |
2ce97e2b LP |
2039 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2040 | if (reply) | |
2041 | *reply = incoming; | |
2042 | else | |
2043 | sd_bus_message_unref(incoming); | |
2044 | ||
2045 | return 1; | |
2046 | } | |
2047 | ||
2048 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2049 | sd_bus_message_unref(incoming); |
2050 | return r; | |
b7f247e0 | 2051 | |
759e02e7 | 2052 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2053 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2054 | sd_bus_message_unref(incoming); |
2055 | return r; | |
2056 | } else { | |
a43b9ca3 | 2057 | r = -EIO; |
759e02e7 LP |
2058 | goto fail; |
2059 | } | |
a8a07f89 | 2060 | |
693eb9a2 | 2061 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2062 | bus->unique_name && |
2063 | incoming->sender && | |
2064 | streq(bus->unique_name, incoming->sender)) { | |
2065 | ||
7d22c717 LP |
2066 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2067 | bus->rqueue_size--; | |
2068 | ||
a8a07f89 LP |
2069 | /* Our own message? Somebody is trying |
2070 | * to send its own client a message, | |
2071 | * let's not dead-lock, let's fail | |
2072 | * immediately. */ | |
2073 | ||
2074 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2075 | r = -ELOOP; |
2076 | goto fail; | |
de1c301e LP |
2077 | } |
2078 | ||
de1c301e | 2079 | /* Try to read more, right-away */ |
7d22c717 | 2080 | i++; |
de1c301e | 2081 | } |
7d22c717 | 2082 | |
766c5809 | 2083 | r = bus_read_message(bus, false, 0); |
32f46480 | 2084 | if (r < 0) { |
441d56a1 | 2085 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2086 | bus_enter_closing(bus); |
759e02e7 | 2087 | r = -ECONNRESET; |
441d56a1 | 2088 | } |
32f46480 | 2089 | |
759e02e7 | 2090 | goto fail; |
32f46480 | 2091 | } |
7d22c717 | 2092 | if (r > 0) |
e3017af9 | 2093 | continue; |
de1c301e LP |
2094 | |
2095 | if (timeout > 0) { | |
2096 | usec_t n; | |
2097 | ||
2098 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2099 | if (n >= timeout) { |
2100 | r = -ETIMEDOUT; | |
2101 | goto fail; | |
2102 | } | |
de1c301e LP |
2103 | |
2104 | left = timeout - n; | |
2105 | } else | |
2106 | left = (uint64_t) -1; | |
2107 | ||
e3017af9 | 2108 | r = bus_poll(bus, true, left); |
de1c301e | 2109 | if (r < 0) |
759e02e7 LP |
2110 | goto fail; |
2111 | if (r == 0) { | |
2112 | r = -ETIMEDOUT; | |
2113 | goto fail; | |
2114 | } | |
de1c301e LP |
2115 | |
2116 | r = dispatch_wqueue(bus); | |
32f46480 | 2117 | if (r < 0) { |
441d56a1 | 2118 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2119 | bus_enter_closing(bus); |
759e02e7 | 2120 | r = -ECONNRESET; |
441d56a1 | 2121 | } |
32f46480 | 2122 | |
759e02e7 | 2123 | goto fail; |
32f46480 | 2124 | } |
de1c301e | 2125 | } |
759e02e7 LP |
2126 | |
2127 | fail: | |
2128 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2129 | } |
2130 | ||
d9f644e2 | 2131 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2132 | |
2133 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2134 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2135 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2136 | |
e82c9509 | 2137 | return bus->input_fd; |
de1c301e LP |
2138 | } |
2139 | ||
d9f644e2 | 2140 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2141 | int flags = 0; |
2142 | ||
d6888822 | 2143 | assert_return(bus, -EINVAL); |
d6888822 | 2144 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2145 | |
a3d59cd1 LP |
2146 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2147 | return -ENOTCONN; | |
2148 | ||
de1c301e LP |
2149 | if (bus->state == BUS_OPENING) |
2150 | flags |= POLLOUT; | |
89ffcd2a LP |
2151 | else if (bus->state == BUS_AUTHENTICATING) { |
2152 | ||
2181a7f5 | 2153 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2154 | flags |= POLLOUT; |
2155 | ||
2156 | flags |= POLLIN; | |
2157 | ||
2158 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2159 | if (bus->rqueue_size <= 0) |
2160 | flags |= POLLIN; | |
2161 | if (bus->wqueue_size > 0) | |
2162 | flags |= POLLOUT; | |
2163 | } | |
2164 | ||
2165 | return flags; | |
2166 | } | |
2167 | ||
d9f644e2 | 2168 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2169 | struct reply_callback *c; |
2170 | ||
d6888822 LP |
2171 | assert_return(bus, -EINVAL); |
2172 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2173 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2174 | |
a3d59cd1 LP |
2175 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2176 | return -ENOTCONN; | |
2177 | ||
8f8f05a9 LP |
2178 | if (bus->track_queue) { |
2179 | *timeout_usec = 0; | |
2180 | return 1; | |
2181 | } | |
2182 | ||
718db961 LP |
2183 | if (bus->state == BUS_CLOSING) { |
2184 | *timeout_usec = 0; | |
2185 | return 1; | |
2186 | } | |
2187 | ||
e3017af9 LP |
2188 | if (bus->state == BUS_AUTHENTICATING) { |
2189 | *timeout_usec = bus->auth_timeout; | |
2190 | return 1; | |
2191 | } | |
2192 | ||
adee69fa LP |
2193 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2194 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2195 | return 0; |
adee69fa | 2196 | } |
e3017af9 | 2197 | |
8efd6381 LP |
2198 | if (bus->rqueue_size > 0) { |
2199 | *timeout_usec = 0; | |
2200 | return 1; | |
2201 | } | |
2202 | ||
e3017af9 | 2203 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2204 | if (!c) { |
2205 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2206 | return 0; |
adee69fa | 2207 | } |
e3017af9 | 2208 | |
19befb2d LP |
2209 | if (c->timeout == 0) { |
2210 | *timeout_usec = (uint64_t) -1; | |
2211 | return 0; | |
2212 | } | |
2213 | ||
e3017af9 LP |
2214 | *timeout_usec = c->timeout; |
2215 | return 1; | |
2216 | } | |
2217 | ||
2218 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2219 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2220 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2221 | struct reply_callback *c; |
1b64f838 | 2222 | sd_bus_slot *slot; |
e3017af9 LP |
2223 | usec_t n; |
2224 | int r; | |
2225 | ||
2226 | assert(bus); | |
2227 | ||
2228 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2229 | if (!c) | |
2230 | return 0; | |
2231 | ||
2232 | n = now(CLOCK_MONOTONIC); | |
2233 | if (c->timeout > n) | |
2234 | return 0; | |
2235 | ||
eb01ba5d LP |
2236 | r = bus_message_new_synthetic_error( |
2237 | bus, | |
693eb9a2 | 2238 | c->cookie, |
14c24659 | 2239 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2240 | &m); |
2241 | if (r < 0) | |
2242 | return r; | |
2243 | ||
7adc46fc | 2244 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2245 | if (r < 0) |
2246 | return r; | |
2247 | ||
e3017af9 | 2248 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2249 | c->timeout = 0; |
2250 | ||
c9fe4af7 | 2251 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2252 | c->cookie = 0; |
2253 | ||
1b64f838 | 2254 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2255 | |
718db961 LP |
2256 | bus->iteration_counter ++; |
2257 | ||
1b64f838 LP |
2258 | bus->current_message = m; |
2259 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2260 | bus->current_handler = c->callback; |
2261 | bus->current_userdata = slot->userdata; | |
19070062 | 2262 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2263 | bus->current_userdata = NULL; |
2264 | bus->current_handler = NULL; | |
d974ad05 | 2265 | bus->current_slot = NULL; |
19befb2d | 2266 | bus->current_message = NULL; |
718db961 | 2267 | |
1b64f838 LP |
2268 | if (slot->floating) { |
2269 | bus_slot_disconnect(slot); | |
2270 | sd_bus_slot_unref(slot); | |
2271 | } | |
2272 | ||
d974ad05 DH |
2273 | sd_bus_slot_unref(slot); |
2274 | ||
1b64f838 | 2275 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2276 | } |
2277 | ||
9d373862 LP |
2278 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2279 | assert(bus); | |
2280 | assert(m); | |
2281 | ||
2282 | if (bus->state != BUS_HELLO) | |
2283 | return 0; | |
2284 | ||
2285 | /* Let's make sure the first message on the bus is the HELLO | |
2286 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2287 | * here (we leave that to the usual handling), we just verify |
2288 | * we don't let any earlier msg through. */ | |
9d373862 | 2289 | |
40ca29a1 LP |
2290 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2291 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2292 | return -EIO; |
2293 | ||
19befb2d | 2294 | if (m->reply_cookie != 1) |
9d373862 LP |
2295 | return -EIO; |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
a652755d | 2300 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2301 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2302 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2303 | struct reply_callback *c; |
1b64f838 | 2304 | sd_bus_slot *slot; |
a652755d LP |
2305 | int r; |
2306 | ||
2307 | assert(bus); | |
2308 | assert(m); | |
2309 | ||
40ca29a1 LP |
2310 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2311 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2312 | return 0; |
2313 | ||
09365592 LP |
2314 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2315 | return 0; | |
2316 | ||
2317 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2318 | return 0; | |
2319 | ||
c9fe4af7 | 2320 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2321 | if (!c) |
2322 | return 0; | |
2323 | ||
19befb2d | 2324 | c->cookie = 0; |
19befb2d | 2325 | |
1b64f838 | 2326 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2327 | |
2ce97e2b LP |
2328 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2329 | ||
2330 | /* If the reply contained a file descriptor which we | |
2331 | * didn't want we pass an error instead. */ | |
2332 | ||
2333 | r = bus_message_new_synthetic_error( | |
2334 | bus, | |
2335 | m->reply_cookie, | |
2336 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2337 | &synthetic_reply); | |
2338 | if (r < 0) | |
1b64f838 | 2339 | return r; |
2ce97e2b | 2340 | |
52cd5877 LP |
2341 | /* Copy over original timestamp */ |
2342 | synthetic_reply->realtime = m->realtime; | |
2343 | synthetic_reply->monotonic = m->monotonic; | |
2344 | synthetic_reply->seqnum = m->seqnum; | |
2345 | ||
2ce97e2b LP |
2346 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2347 | if (r < 0) | |
1b64f838 | 2348 | return r; |
2ce97e2b LP |
2349 | |
2350 | m = synthetic_reply; | |
2351 | } else { | |
2352 | r = sd_bus_message_rewind(m, true); | |
2353 | if (r < 0) | |
1b64f838 | 2354 | return r; |
2ce97e2b | 2355 | } |
88fe224c | 2356 | |
1b64f838 LP |
2357 | if (c->timeout != 0) { |
2358 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2359 | c->timeout = 0; | |
2360 | } | |
19befb2d | 2361 | |
1b64f838 | 2362 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2363 | bus->current_handler = c->callback; |
2364 | bus->current_userdata = slot->userdata; | |
19070062 | 2365 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2366 | bus->current_userdata = NULL; |
2367 | bus->current_handler = NULL; | |
d974ad05 | 2368 | bus->current_slot = NULL; |
a652755d | 2369 | |
19befb2d LP |
2370 | if (slot->floating) { |
2371 | bus_slot_disconnect(slot); | |
2372 | sd_bus_slot_unref(slot); | |
2373 | } | |
2374 | ||
d974ad05 DH |
2375 | sd_bus_slot_unref(slot); |
2376 | ||
1b64f838 | 2377 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2378 | } |
2379 | ||
2380 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2381 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2382 | struct filter_callback *l; |
2383 | int r; | |
2384 | ||
392d5b37 LP |
2385 | assert(bus); |
2386 | assert(m); | |
2387 | ||
7286037f LP |
2388 | do { |
2389 | bus->filter_callbacks_modified = false; | |
2390 | ||
2391 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2392 | sd_bus_slot *slot; |
7286037f LP |
2393 | |
2394 | if (bus->filter_callbacks_modified) | |
2395 | break; | |
2396 | ||
2397 | /* Don't run this more than once per iteration */ | |
2398 | if (l->last_iteration == bus->iteration_counter) | |
2399 | continue; | |
2400 | ||
2401 | l->last_iteration = bus->iteration_counter; | |
2402 | ||
88fe224c LP |
2403 | r = sd_bus_message_rewind(m, true); |
2404 | if (r < 0) | |
2405 | return r; | |
2406 | ||
1b64f838 LP |
2407 | slot = container_of(l, sd_bus_slot, filter_callback); |
2408 | ||
2409 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2410 | bus->current_handler = l->callback; |
2411 | bus->current_userdata = slot->userdata; | |
19070062 | 2412 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2413 | bus->current_userdata = NULL; |
2414 | bus->current_handler = NULL; | |
1b64f838 | 2415 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2416 | |
ebcf1f97 | 2417 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2418 | if (r != 0) |
2419 | return r; | |
2420 | ||
2421 | } | |
2422 | ||
2423 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2424 | |
2425 | return 0; | |
2426 | } | |
2427 | ||
392d5b37 | 2428 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2429 | int r; |
2430 | ||
392d5b37 LP |
2431 | assert(bus); |
2432 | assert(m); | |
2433 | ||
7286037f LP |
2434 | do { |
2435 | bus->match_callbacks_modified = false; | |
2436 | ||
eb01ba5d | 2437 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2438 | if (r != 0) |
2439 | return r; | |
2440 | ||
2441 | } while (bus->match_callbacks_modified); | |
2442 | ||
2443 | return 0; | |
392d5b37 LP |
2444 | } |
2445 | ||
b9bf7e2b LP |
2446 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2447 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2448 | int r; | |
2449 | ||
2450 | assert(bus); | |
2451 | assert(m); | |
2452 | ||
09365592 LP |
2453 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2454 | return 0; | |
2455 | ||
758bf0c7 LP |
2456 | if (bus->manual_peer_interface) |
2457 | return 0; | |
2458 | ||
40ca29a1 | 2459 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2460 | return 0; |
2461 | ||
2462 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2463 | return 0; | |
2464 | ||
0461f8cd | 2465 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2466 | return 1; |
2467 | ||
2468 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2469 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2470 | else if (streq_ptr(m->member, "GetMachineId")) { |
2471 | sd_id128_t id; | |
2472 | char sid[33]; | |
2473 | ||
2474 | r = sd_id128_get_machine(&id); | |
2475 | if (r < 0) | |
2476 | return r; | |
2477 | ||
df2d202e | 2478 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2479 | if (r < 0) |
2480 | return r; | |
2481 | ||
2482 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2483 | } else { | |
29ddb38f | 2484 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2485 | m, &reply, |
40ca29a1 | 2486 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2487 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2488 | } |
2489 | ||
2490 | if (r < 0) | |
2491 | return r; | |
2492 | ||
2493 | r = sd_bus_send(bus, reply, NULL); | |
2494 | if (r < 0) | |
2495 | return r; | |
2496 | ||
2497 | return 1; | |
2498 | } | |
2499 | ||
2ce97e2b LP |
2500 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2501 | assert(bus); | |
2502 | assert(m); | |
2503 | ||
2504 | /* If we got a message with a file descriptor which we didn't | |
2505 | * want to accept, then let's drop it. How can this even | |
2506 | * happen? For example, when the kernel queues a message into | |
2507 | * an activatable names's queue which allows fds, and then is | |
2508 | * delivered to us later even though we ourselves did not | |
2509 | * negotiate it. */ | |
2510 | ||
09365592 LP |
2511 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2512 | return 0; | |
2513 | ||
2ce97e2b LP |
2514 | if (m->n_fds <= 0) |
2515 | return 0; | |
2516 | ||
2517 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2518 | return 0; | |
2519 | ||
2520 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2521 | return 1; /* just eat it up */ | |
2522 | ||
2523 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2524 | } | |
2525 | ||
992c052c | 2526 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2527 | int r; |
2528 | ||
2529 | assert(bus); | |
992c052c | 2530 | assert(m); |
e3017af9 | 2531 | |
19befb2d | 2532 | bus->current_message = m; |
992c052c | 2533 | bus->iteration_counter++; |
e3017af9 | 2534 | |
f9f97ca6 | 2535 | log_debug_bus_message(m); |
40ca29a1 | 2536 | |
992c052c LP |
2537 | r = process_hello(bus, m); |
2538 | if (r != 0) | |
affff0b6 | 2539 | goto finish; |
a652755d | 2540 | |
992c052c LP |
2541 | r = process_reply(bus, m); |
2542 | if (r != 0) | |
affff0b6 | 2543 | goto finish; |
e3017af9 | 2544 | |
2ce97e2b LP |
2545 | r = process_fd_check(bus, m); |
2546 | if (r != 0) | |
2547 | goto finish; | |
2548 | ||
992c052c LP |
2549 | r = process_filter(bus, m); |
2550 | if (r != 0) | |
affff0b6 | 2551 | goto finish; |
a652755d | 2552 | |
992c052c LP |
2553 | r = process_match(bus, m); |
2554 | if (r != 0) | |
affff0b6 | 2555 | goto finish; |
a652755d | 2556 | |
992c052c LP |
2557 | r = process_builtin(bus, m); |
2558 | if (r != 0) | |
affff0b6 LP |
2559 | goto finish; |
2560 | ||
2561 | r = bus_process_object(bus, m); | |
a652755d | 2562 | |
affff0b6 | 2563 | finish: |
19befb2d | 2564 | bus->current_message = NULL; |
affff0b6 | 2565 | return r; |
29ddb38f | 2566 | } |
88fe224c | 2567 | |
8f8f05a9 LP |
2568 | static int dispatch_track(sd_bus *bus) { |
2569 | assert(bus); | |
2570 | ||
2571 | if (!bus->track_queue) | |
2572 | return 0; | |
2573 | ||
2574 | bus_track_dispatch(bus->track_queue); | |
2575 | return 1; | |
2576 | } | |
2577 | ||
766c5809 | 2578 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2579 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2580 | int r; |
a652755d | 2581 | |
29ddb38f | 2582 | assert(bus); |
992c052c | 2583 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2584 | |
992c052c LP |
2585 | r = process_timeout(bus); |
2586 | if (r != 0) | |
2587 | goto null_message; | |
7286037f | 2588 | |
992c052c LP |
2589 | r = dispatch_wqueue(bus); |
2590 | if (r != 0) | |
2591 | goto null_message; | |
7286037f | 2592 | |
8f8f05a9 LP |
2593 | r = dispatch_track(bus); |
2594 | if (r != 0) | |
2595 | goto null_message; | |
2596 | ||
766c5809 | 2597 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2598 | if (r < 0) |
2599 | return r; | |
2600 | if (!m) | |
2601 | goto null_message; | |
7286037f | 2602 | |
992c052c LP |
2603 | r = process_message(bus, m); |
2604 | if (r != 0) | |
2605 | goto null_message; | |
7286037f | 2606 | |
992c052c LP |
2607 | if (ret) { |
2608 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2609 | if (r < 0) |
2610 | return r; | |
e3017af9 | 2611 | |
992c052c LP |
2612 | *ret = m; |
2613 | m = NULL; | |
2614 | return 1; | |
2615 | } | |
a652755d | 2616 | |
40ca29a1 | 2617 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2618 | |
dc74ce9b LP |
2619 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2620 | strna(sd_bus_message_get_sender(m)), | |
2621 | strna(sd_bus_message_get_path(m)), | |
2622 | strna(sd_bus_message_get_interface(m)), | |
2623 | strna(sd_bus_message_get_member(m))); | |
2624 | ||
992c052c | 2625 | r = sd_bus_reply_method_errorf( |
df2d202e | 2626 | m, |
40ca29a1 | 2627 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2628 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2629 | if (r < 0) |
2630 | return r; | |
2631 | } | |
e3017af9 | 2632 | |
992c052c | 2633 | return 1; |
0a72c2bd | 2634 | |
992c052c LP |
2635 | null_message: |
2636 | if (r >= 0 && ret) | |
2637 | *ret = NULL; | |
0a72c2bd | 2638 | |
992c052c | 2639 | return r; |
29ddb38f | 2640 | } |
0a72c2bd | 2641 | |
718db961 LP |
2642 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2643 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2644 | struct reply_callback *c; | |
2645 | int r; | |
2646 | ||
2647 | assert(bus); | |
2648 | assert(bus->state == BUS_CLOSING); | |
2649 | ||
c9fe4af7 | 2650 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2651 | if (c) { |
ebcf1f97 | 2652 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2653 | sd_bus_slot *slot; |
ebcf1f97 | 2654 | |
718db961 LP |
2655 | /* First, fail all outstanding method calls */ |
2656 | r = bus_message_new_synthetic_error( | |
2657 | bus, | |
693eb9a2 | 2658 | c->cookie, |
14c24659 | 2659 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2660 | &m); |
2661 | if (r < 0) | |
2662 | return r; | |
2663 | ||
7adc46fc | 2664 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2665 | if (r < 0) |
2666 | return r; | |
2667 | ||
19befb2d | 2668 | if (c->timeout != 0) { |
718db961 | 2669 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2670 | c->timeout = 0; |
2671 | } | |
718db961 | 2672 | |
c9fe4af7 | 2673 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2674 | c->cookie = 0; |
2675 | ||
1b64f838 | 2676 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2677 | |
718db961 LP |
2678 | bus->iteration_counter++; |
2679 | ||
1b64f838 LP |
2680 | bus->current_message = m; |
2681 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2682 | bus->current_handler = c->callback; |
2683 | bus->current_userdata = slot->userdata; | |
19070062 | 2684 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2685 | bus->current_userdata = NULL; |
2686 | bus->current_handler = NULL; | |
d974ad05 | 2687 | bus->current_slot = NULL; |
1b64f838 LP |
2688 | bus->current_message = NULL; |
2689 | ||
2690 | if (slot->floating) { | |
2691 | bus_slot_disconnect(slot); | |
2692 | sd_bus_slot_unref(slot); | |
2693 | } | |
718db961 | 2694 | |
d974ad05 DH |
2695 | sd_bus_slot_unref(slot); |
2696 | ||
1b64f838 | 2697 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2698 | } |
2699 | ||
2700 | /* Then, synthesize a Disconnected message */ | |
2701 | r = sd_bus_message_new_signal( | |
2702 | bus, | |
151b9b96 | 2703 | &m, |
718db961 LP |
2704 | "/org/freedesktop/DBus/Local", |
2705 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2706 | "Disconnected"); |
718db961 LP |
2707 | if (r < 0) |
2708 | return r; | |
2709 | ||
fb6d9b77 | 2710 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2711 | |
7adc46fc | 2712 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2713 | if (r < 0) |
2714 | return r; | |
2715 | ||
2716 | sd_bus_close(bus); | |
2717 | ||
19befb2d | 2718 | bus->current_message = m; |
718db961 LP |
2719 | bus->iteration_counter++; |
2720 | ||
2721 | r = process_filter(bus, m); | |
2722 | if (r != 0) | |
2723 | goto finish; | |
2724 | ||
2725 | r = process_match(bus, m); | |
2726 | if (r != 0) | |
2727 | goto finish; | |
2728 | ||
2729 | if (ret) { | |
2730 | *ret = m; | |
2731 | m = NULL; | |
2732 | } | |
2733 | ||
2734 | r = 1; | |
2735 | ||
2736 | finish: | |
19befb2d LP |
2737 | bus->current_message = NULL; |
2738 | ||
718db961 LP |
2739 | return r; |
2740 | } | |
2741 | ||
766c5809 | 2742 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2743 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2744 | int r; |
0a72c2bd | 2745 | |
992c052c LP |
2746 | /* Returns 0 when we didn't do anything. This should cause the |
2747 | * caller to invoke sd_bus_wait() before returning the next | |
2748 | * time. Returns > 0 when we did something, which possibly | |
2749 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2750 | |
d6888822 LP |
2751 | assert_return(bus, -EINVAL); |
2752 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2753 | |
992c052c | 2754 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2755 | assert_return(!bus->current_message, -EBUSY); |
2756 | assert(!bus->current_slot); | |
0a72c2bd | 2757 | |
992c052c | 2758 | switch (bus->state) { |
0a72c2bd | 2759 | |
992c052c | 2760 | case BUS_UNSET: |
992c052c | 2761 | return -ENOTCONN; |
0a72c2bd | 2762 | |
6d6f4904 LP |
2763 | case BUS_CLOSED: |
2764 | return -ECONNRESET; | |
2765 | ||
992c052c LP |
2766 | case BUS_OPENING: |
2767 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2768 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2769 | bus_enter_closing(bus); |
2770 | r = 1; | |
2771 | } else if (r < 0) | |
29ddb38f | 2772 | return r; |
992c052c LP |
2773 | if (ret) |
2774 | *ret = NULL; | |
a652755d LP |
2775 | return r; |
2776 | ||
992c052c | 2777 | case BUS_AUTHENTICATING: |
992c052c | 2778 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2779 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2780 | bus_enter_closing(bus); |
2781 | r = 1; | |
2782 | } else if (r < 0) | |
29ddb38f | 2783 | return r; |
718db961 | 2784 | |
992c052c LP |
2785 | if (ret) |
2786 | *ret = NULL; | |
718db961 | 2787 | |
992c052c | 2788 | return r; |
a652755d | 2789 | |
992c052c LP |
2790 | case BUS_RUNNING: |
2791 | case BUS_HELLO: | |
766c5809 | 2792 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2793 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2794 | bus_enter_closing(bus); |
2795 | r = 1; | |
2796 | ||
2797 | if (ret) | |
2798 | *ret = NULL; | |
2799 | } | |
43a43f50 | 2800 | |
43a43f50 | 2801 | return r; |
718db961 LP |
2802 | |
2803 | case BUS_CLOSING: | |
2804 | return process_closing(bus, ret); | |
992c052c | 2805 | } |
43a43f50 | 2806 | |
992c052c | 2807 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2808 | } |
2809 | ||
766c5809 LP |
2810 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2811 | return bus_process_internal(bus, false, 0, ret); | |
2812 | } | |
2813 | ||
2814 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2815 | return bus_process_internal(bus, true, priority, ret); | |
2816 | } | |
2817 | ||
992c052c LP |
2818 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2819 | struct pollfd p[2] = {}; | |
2820 | int r, e, n; | |
2821 | struct timespec ts; | |
3a43da28 | 2822 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2823 | |
2824 | assert(bus); | |
718db961 LP |
2825 | |
2826 | if (bus->state == BUS_CLOSING) | |
2827 | return 1; | |
2828 | ||
a3d59cd1 LP |
2829 | if (!BUS_IS_OPEN(bus->state)) |
2830 | return -ENOTCONN; | |
adcdb374 | 2831 | |
992c052c LP |
2832 | e = sd_bus_get_events(bus); |
2833 | if (e < 0) | |
2834 | return e; | |
adcdb374 | 2835 | |
992c052c | 2836 | if (need_more) |
8efd6381 LP |
2837 | /* The caller really needs some more data, he doesn't |
2838 | * care about what's already read, or any timeouts | |
ad67ef27 | 2839 | * except its own. */ |
992c052c | 2840 | e |= POLLIN; |
992c052c | 2841 | else { |
8efd6381 LP |
2842 | usec_t until; |
2843 | /* The caller wants to process if there's something to | |
2844 | * process, but doesn't care otherwise */ | |
2845 | ||
2846 | r = sd_bus_get_timeout(bus, &until); | |
2847 | if (r < 0) | |
2848 | return r; | |
2849 | if (r > 0) { | |
2850 | usec_t nw; | |
2851 | nw = now(CLOCK_MONOTONIC); | |
2852 | m = until > nw ? until - nw : 0; | |
2853 | } | |
992c052c | 2854 | } |
adcdb374 | 2855 | |
992c052c LP |
2856 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2857 | m = timeout_usec; | |
adcdb374 | 2858 | |
992c052c LP |
2859 | p[0].fd = bus->input_fd; |
2860 | if (bus->output_fd == bus->input_fd) { | |
2861 | p[0].events = e; | |
2862 | n = 1; | |
2863 | } else { | |
2864 | p[0].events = e & POLLIN; | |
2865 | p[1].fd = bus->output_fd; | |
2866 | p[1].events = e & POLLOUT; | |
2867 | n = 2; | |
adcdb374 LP |
2868 | } |
2869 | ||
992c052c | 2870 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2871 | if (r < 0) |
992c052c | 2872 | return -errno; |
adcdb374 | 2873 | |
992c052c | 2874 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2875 | } |
2876 | ||
d9f644e2 | 2877 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2878 | |
d6888822 | 2879 | assert_return(bus, -EINVAL); |
d6888822 | 2880 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2881 | |
718db961 LP |
2882 | if (bus->state == BUS_CLOSING) |
2883 | return 0; | |
2884 | ||
a3d59cd1 LP |
2885 | if (!BUS_IS_OPEN(bus->state)) |
2886 | return -ENOTCONN; | |
718db961 | 2887 | |
992c052c LP |
2888 | if (bus->rqueue_size > 0) |
2889 | return 0; | |
9db76355 | 2890 | |
992c052c LP |
2891 | return bus_poll(bus, false, timeout_usec); |
2892 | } | |
9db76355 | 2893 | |
d9f644e2 | 2894 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2895 | int r; |
9db76355 | 2896 | |
d6888822 | 2897 | assert_return(bus, -EINVAL); |
d6888822 | 2898 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2899 | |
718db961 LP |
2900 | if (bus->state == BUS_CLOSING) |
2901 | return 0; | |
2902 | ||
a3d59cd1 LP |
2903 | if (!BUS_IS_OPEN(bus->state)) |
2904 | return -ENOTCONN; | |
718db961 | 2905 | |
992c052c LP |
2906 | r = bus_ensure_running(bus); |
2907 | if (r < 0) | |
2908 | return r; | |
9db76355 | 2909 | |
992c052c LP |
2910 | if (bus->wqueue_size <= 0) |
2911 | return 0; | |
9db76355 | 2912 | |
992c052c LP |
2913 | for (;;) { |
2914 | r = dispatch_wqueue(bus); | |
32f46480 | 2915 | if (r < 0) { |
441d56a1 | 2916 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2917 | bus_enter_closing(bus); |
441d56a1 LP |
2918 | return -ECONNRESET; |
2919 | } | |
32f46480 | 2920 | |
9db76355 | 2921 | return r; |
32f46480 | 2922 | } |
9db76355 | 2923 | |
992c052c LP |
2924 | if (bus->wqueue_size <= 0) |
2925 | return 0; | |
9db76355 | 2926 | |
992c052c | 2927 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2928 | if (r < 0) |
2929 | return r; | |
9db76355 | 2930 | } |
9db76355 LP |
2931 | } |
2932 | ||
19befb2d LP |
2933 | _public_ int sd_bus_add_filter( |
2934 | sd_bus *bus, | |
2935 | sd_bus_slot **slot, | |
2936 | sd_bus_message_handler_t callback, | |
2937 | void *userdata) { | |
d9f644e2 | 2938 | |
19befb2d | 2939 | sd_bus_slot *s; |
de1c301e | 2940 | |
d6888822 LP |
2941 | assert_return(bus, -EINVAL); |
2942 | assert_return(callback, -EINVAL); | |
2943 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2944 | |
19befb2d LP |
2945 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2946 | if (!s) | |
29ddb38f LP |
2947 | return -ENOMEM; |
2948 | ||
19befb2d | 2949 | s->filter_callback.callback = callback; |
a652755d | 2950 | |
19befb2d LP |
2951 | bus->filter_callbacks_modified = true; |
2952 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2953 | |
19befb2d LP |
2954 | if (slot) |
2955 | *slot = s; | |
29ddb38f | 2956 | |
992c052c | 2957 | return 0; |
a652755d | 2958 | } |
392d5b37 | 2959 | |
19befb2d LP |
2960 | _public_ int sd_bus_add_match( |
2961 | sd_bus *bus, | |
2962 | sd_bus_slot **slot, | |
2963 | const char *match, | |
2964 | sd_bus_message_handler_t callback, | |
2965 | void *userdata) { | |
d9f644e2 | 2966 | |
992c052c LP |
2967 | struct bus_match_component *components = NULL; |
2968 | unsigned n_components = 0; | |
2915234d | 2969 | sd_bus_slot *s = NULL; |
992c052c | 2970 | int r = 0; |
392d5b37 | 2971 | |
d6888822 LP |
2972 | assert_return(bus, -EINVAL); |
2973 | assert_return(match, -EINVAL); | |
2974 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2975 | |
992c052c LP |
2976 | r = bus_match_parse(match, &components, &n_components); |
2977 | if (r < 0) | |
2978 | goto finish; | |
29ddb38f | 2979 | |
19befb2d LP |
2980 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2981 | if (!s) { | |
2982 | r = -ENOMEM; | |
2983 | goto finish; | |
2984 | } | |
2985 | ||
2986 | s->match_callback.callback = callback; | |
2987 | s->match_callback.cookie = ++bus->match_cookie; | |
2988 | ||
992c052c | 2989 | if (bus->bus_client) { |
cc65fe5e | 2990 | enum bus_match_scope scope; |
29ddb38f | 2991 | |
cc65fe5e | 2992 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 2993 | |
cc65fe5e LP |
2994 | /* Do not install server-side matches for matches |
2995 | * against the local service, interface or bus | |
9ee7a50c DH |
2996 | * path. */ |
2997 | if (scope != BUS_MATCH_LOCAL) { | |
cc65fe5e LP |
2998 | |
2999 | if (!bus->is_kernel) { | |
3000 | /* When this is not a kernel transport, we | |
3001 | * store the original match string, so that we | |
3002 | * can use it to remove the match again */ | |
3003 | ||
3004 | s->match_callback.match_string = strdup(match); | |
3005 | if (!s->match_callback.match_string) { | |
3006 | r = -ENOMEM; | |
3007 | goto finish; | |
3008 | } | |
19befb2d | 3009 | } |
19befb2d | 3010 | |
cc65fe5e LP |
3011 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); |
3012 | if (r < 0) | |
3013 | goto finish; | |
3014 | ||
3015 | s->match_added = true; | |
3016 | } | |
392d5b37 LP |
3017 | } |
3018 | ||
992c052c | 3019 | bus->match_callbacks_modified = true; |
19befb2d LP |
3020 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3021 | if (r < 0) | |
3022 | goto finish; | |
3023 | ||
3024 | if (slot) | |
3025 | *slot = s; | |
3026 | s = NULL; | |
917b5dc7 | 3027 | |
992c052c LP |
3028 | finish: |
3029 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3030 | sd_bus_slot_unref(s); |
3031 | ||
992c052c | 3032 | return r; |
917b5dc7 LP |
3033 | } |
3034 | ||
19befb2d LP |
3035 | int bus_remove_match_by_string( |
3036 | sd_bus *bus, | |
3037 | const char *match, | |
3038 | sd_bus_message_handler_t callback, | |
3039 | void *userdata) { | |
d9f644e2 | 3040 | |
992c052c LP |
3041 | struct bus_match_component *components = NULL; |
3042 | unsigned n_components = 0; | |
19befb2d LP |
3043 | struct match_callback *c; |
3044 | int r = 0; | |
917b5dc7 | 3045 | |
d6888822 LP |
3046 | assert_return(bus, -EINVAL); |
3047 | assert_return(match, -EINVAL); | |
3048 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3049 | |
992c052c | 3050 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3051 | if (r < 0) |
19befb2d | 3052 | goto finish; |
f10dda3b | 3053 | |
19befb2d LP |
3054 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3055 | if (r <= 0) | |
3056 | goto finish; | |
f10dda3b | 3057 | |
19befb2d | 3058 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3059 | |
19befb2d | 3060 | finish: |
992c052c | 3061 | bus_match_parse_free(components, n_components); |
f10dda3b | 3062 | |
19befb2d | 3063 | return r; |
f10dda3b LP |
3064 | } |
3065 | ||
992c052c LP |
3066 | bool bus_pid_changed(sd_bus *bus) { |
3067 | assert(bus); | |
f10dda3b | 3068 | |
992c052c LP |
3069 | /* We don't support people creating a bus connection and |
3070 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3071 | |
992c052c | 3072 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3073 | } |
40ca29a1 LP |
3074 | |
3075 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3076 | sd_bus *bus = userdata; |
40ca29a1 LP |
3077 | int r; |
3078 | ||
3079 | assert(bus); | |
3080 | ||
3081 | r = sd_bus_process(bus, NULL); | |
3082 | if (r < 0) | |
3083 | return r; | |
3084 | ||
3085 | return 1; | |
3086 | } | |
3087 | ||
3088 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3089 | sd_bus *bus = userdata; |
40ca29a1 LP |
3090 | int r; |
3091 | ||
3092 | assert(bus); | |
3093 | ||
3094 | r = sd_bus_process(bus, NULL); | |
3095 | if (r < 0) | |
3096 | return r; | |
3097 | ||
3098 | return 1; | |
3099 | } | |
3100 | ||
3101 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3102 | sd_bus *bus = userdata; | |
3103 | int r, e; | |
3104 | usec_t until; | |
3105 | ||
3106 | assert(s); | |
3107 | assert(bus); | |
3108 | ||
3109 | e = sd_bus_get_events(bus); | |
3110 | if (e < 0) | |
3111 | return e; | |
3112 | ||
3113 | if (bus->output_fd != bus->input_fd) { | |
3114 | ||
3115 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3116 | if (r < 0) | |
3117 | return r; | |
3118 | ||
3119 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3120 | if (r < 0) | |
3121 | return r; | |
3122 | } else { | |
3123 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3124 | if (r < 0) | |
3125 | return r; | |
3126 | } | |
3127 | ||
3128 | r = sd_bus_get_timeout(bus, &until); | |
3129 | if (r < 0) | |
3130 | return r; | |
3131 | if (r > 0) { | |
3132 | int j; | |
3133 | ||
3134 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3135 | if (j < 0) | |
3136 | return j; | |
3137 | } | |
3138 | ||
3139 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3140 | if (r < 0) | |
3141 | return r; | |
3142 | ||
3143 | return 1; | |
3144 | } | |
3145 | ||
abc5fe72 LP |
3146 | static int quit_callback(sd_event_source *event, void *userdata) { |
3147 | sd_bus *bus = userdata; | |
3148 | ||
3149 | assert(event); | |
3150 | ||
3151 | sd_bus_flush(bus); | |
7bb4d371 | 3152 | sd_bus_close(bus); |
abc5fe72 LP |
3153 | |
3154 | return 1; | |
3155 | } | |
3156 | ||
1e05d493 LP |
3157 | static int attach_io_events(sd_bus *bus) { |
3158 | int r; | |
3159 | ||
3160 | assert(bus); | |
3161 | ||
3162 | if (bus->input_fd < 0) | |
3163 | return 0; | |
3164 | ||
3165 | if (!bus->event) | |
3166 | return 0; | |
3167 | ||
3168 | if (!bus->input_io_event_source) { | |
151b9b96 | 3169 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3170 | if (r < 0) |
3171 | return r; | |
3172 | ||
3173 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3174 | if (r < 0) | |
3175 | return r; | |
3176 | ||
3177 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3178 | if (r < 0) |
3179 | return r; | |
3180 | ||
356779df | 3181 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3182 | } else |
3183 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3184 | ||
3185 | if (r < 0) | |
3186 | return r; | |
3187 | ||
3188 | if (bus->output_fd != bus->input_fd) { | |
3189 | assert(bus->output_fd >= 0); | |
3190 | ||
3191 | if (!bus->output_io_event_source) { | |
151b9b96 | 3192 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3193 | if (r < 0) |
3194 | return r; | |
3195 | ||
3196 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3197 | if (r < 0) |
3198 | return r; | |
3199 | ||
356779df | 3200 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3201 | } else |
3202 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3203 | ||
3204 | if (r < 0) | |
3205 | return r; | |
3206 | } | |
3207 | ||
3208 | return 0; | |
3209 | } | |
3210 | ||
3211 | static void detach_io_events(sd_bus *bus) { | |
3212 | assert(bus); | |
3213 | ||
3214 | if (bus->input_io_event_source) { | |
3215 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3216 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3217 | } | |
3218 | ||
3219 | if (bus->output_io_event_source) { | |
3220 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3221 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3222 | } | |
3223 | } | |
3224 | ||
d9f644e2 | 3225 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3226 | int r; |
3227 | ||
3228 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3229 | assert_return(!bus->event, -EBUSY); |
3230 | ||
3231 | assert(!bus->input_io_event_source); | |
3232 | assert(!bus->output_io_event_source); | |
3233 | assert(!bus->time_event_source); | |
3234 | ||
76b54375 LP |
3235 | if (event) |
3236 | bus->event = sd_event_ref(event); | |
3237 | else { | |
3238 | r = sd_event_default(&bus->event); | |
3239 | if (r < 0) | |
3240 | return r; | |
3241 | } | |
40ca29a1 | 3242 | |
1e05d493 | 3243 | bus->event_priority = priority; |
40ca29a1 | 3244 | |
6a0f1f6d | 3245 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3246 | if (r < 0) |
3247 | goto fail; | |
3248 | ||
3249 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3250 | if (r < 0) | |
3251 | goto fail; | |
3252 | ||
356779df | 3253 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3254 | if (r < 0) |
3255 | goto fail; | |
3256 | ||
151b9b96 | 3257 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3258 | if (r < 0) |
3259 | goto fail; | |
3260 | ||
356779df | 3261 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3262 | if (r < 0) |
3263 | goto fail; | |
3264 | ||
1e05d493 LP |
3265 | r = attach_io_events(bus); |
3266 | if (r < 0) | |
3267 | goto fail; | |
3268 | ||
40ca29a1 LP |
3269 | return 0; |
3270 | ||
3271 | fail: | |
3272 | sd_bus_detach_event(bus); | |
3273 | return r; | |
3274 | } | |
3275 | ||
d9f644e2 | 3276 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3277 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3278 | |
3279 | if (!bus->event) | |
3280 | return 0; | |
40ca29a1 | 3281 | |
1e05d493 | 3282 | detach_io_events(bus); |
40ca29a1 | 3283 | |
86befb40 LP |
3284 | if (bus->time_event_source) { |
3285 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3286 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3287 | } |
40ca29a1 | 3288 | |
86befb40 LP |
3289 | if (bus->quit_event_source) { |
3290 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3291 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3292 | } |
abc5fe72 | 3293 | |
93f1bcf4 | 3294 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3295 | return 1; |
40ca29a1 | 3296 | } |
affff0b6 | 3297 | |
2be44176 LP |
3298 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3299 | assert_return(bus, NULL); | |
3300 | ||
3301 | return bus->event; | |
3302 | } | |
3303 | ||
19befb2d LP |
3304 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3305 | assert_return(bus, NULL); | |
3306 | ||
3307 | return bus->current_message; | |
3308 | } | |
3309 | ||
3310 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3311 | assert_return(bus, NULL); |
3312 | ||
19befb2d | 3313 | return bus->current_slot; |
affff0b6 | 3314 | } |
76b54375 | 3315 | |
caa82984 LP |
3316 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3317 | assert_return(bus, NULL); | |
3318 | ||
3319 | return bus->current_handler; | |
3320 | } | |
3321 | ||
3322 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3323 | assert_return(bus, NULL); | |
3324 | ||
3325 | return bus->current_userdata; | |
3326 | } | |
3327 | ||
76b54375 LP |
3328 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3329 | sd_bus *b = NULL; | |
3330 | int r; | |
3331 | ||
3332 | assert(bus_open); | |
3333 | assert(default_bus); | |
3334 | ||
3335 | if (!ret) | |
3336 | return !!*default_bus; | |
3337 | ||
3338 | if (*default_bus) { | |
3339 | *ret = sd_bus_ref(*default_bus); | |
3340 | return 0; | |
3341 | } | |
3342 | ||
3343 | r = bus_open(&b); | |
3344 | if (r < 0) | |
3345 | return r; | |
3346 | ||
3347 | b->default_bus_ptr = default_bus; | |
3348 | b->tid = gettid(); | |
3349 | *default_bus = b; | |
3350 | ||
3351 | *ret = b; | |
3352 | return 1; | |
3353 | } | |
3354 | ||
3355 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3356 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3357 | } | |
3358 | ||
76b54375 | 3359 | |
fa2f8973 | 3360 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3361 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3362 | } | |
3363 | ||
af08d2f9 LP |
3364 | _public_ int sd_bus_default(sd_bus **ret) { |
3365 | ||
3366 | const char *e; | |
3367 | ||
3368 | /* Let's try our best to reuse another cached connection. If | |
3369 | * the starter bus type is set, connect via our normal | |
3370 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3371 | * we can share the connection with the user/system default | |
3372 | * bus. */ | |
3373 | ||
3374 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3375 | if (e) { | |
3376 | if (streq(e, "system")) | |
3377 | return sd_bus_default_system(ret); | |
09365592 | 3378 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3379 | return sd_bus_default_user(ret); |
3380 | } | |
3381 | ||
3382 | /* No type is specified, so we have not other option than to | |
3383 | * use the starter address if it is set. */ | |
3384 | ||
3385 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3386 | if (e) { | |
af08d2f9 LP |
3387 | |
3388 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3389 | } | |
3390 | ||
3391 | /* Finally, if nothing is set use the cached connection for | |
3392 | * the right scope */ | |
3393 | ||
3394 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3395 | return sd_bus_default_user(ret); | |
3396 | else | |
3397 | return sd_bus_default_system(ret); | |
3398 | } | |
3399 | ||
76b54375 LP |
3400 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3401 | assert_return(b, -EINVAL); | |
3402 | assert_return(tid, -EINVAL); | |
3403 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3404 | ||
3405 | if (b->tid != 0) { | |
3406 | *tid = b->tid; | |
3407 | return 0; | |
3408 | } | |
3409 | ||
3410 | if (b->event) | |
3411 | return sd_event_get_tid(b->event, tid); | |
3412 | ||
3413 | return -ENXIO; | |
3414 | } | |
28383ba1 | 3415 | |
a6278b88 LP |
3416 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3417 | _cleanup_free_ char *e = NULL; | |
3418 | char *ret; | |
3419 | ||
3420 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3421 | assert_return(external_id, -EINVAL); | |
3422 | assert_return(ret_path, -EINVAL); | |
3423 | ||
3424 | e = bus_label_escape(external_id); | |
3425 | if (!e) | |
3426 | return -ENOMEM; | |
3427 | ||
3428 | ret = strjoin(prefix, "/", e, NULL); | |
3429 | if (!ret) | |
3430 | return -ENOMEM; | |
3431 | ||
3432 | *ret_path = ret; | |
3433 | return 0; | |
28383ba1 LP |
3434 | } |
3435 | ||
a6278b88 LP |
3436 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3437 | const char *e; | |
3438 | char *ret; | |
3439 | ||
3440 | assert_return(object_path_is_valid(path), -EINVAL); | |
3441 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3442 | assert_return(external_id, -EINVAL); | |
3443 | ||
3444 | e = object_path_startswith(path, prefix); | |
3445 | if (!e) { | |
3446 | *external_id = NULL; | |
3447 | return 0; | |
3448 | } | |
3449 | ||
3450 | ret = bus_label_unescape(e); | |
3451 | if (!ret) | |
3452 | return -ENOMEM; | |
3453 | ||
3454 | *external_id = ret; | |
3455 | return 1; | |
28383ba1 | 3456 | } |
5b12334d | 3457 | |
dfb815c3 DH |
3458 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3459 | _cleanup_strv_free_ char **labels = NULL; | |
3460 | char *path, *path_pos, **label_pos; | |
3461 | const char *sep, *template_pos; | |
3462 | size_t path_length; | |
3463 | va_list list; | |
3464 | int r; | |
3465 | ||
3466 | assert_return(out, -EINVAL); | |
3467 | assert_return(path_template, -EINVAL); | |
3468 | ||
3469 | path_length = strlen(path_template); | |
3470 | ||
19932084 | 3471 | va_start(list, path_template); |
dfb815c3 DH |
3472 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3473 | const char *arg; | |
3474 | char *label; | |
3475 | ||
3476 | arg = va_arg(list, const char *); | |
3477 | if (!arg) { | |
3478 | va_end(list); | |
3479 | return -EINVAL; | |
3480 | } | |
3481 | ||
3482 | label = bus_label_escape(arg); | |
3483 | if (!label) { | |
3484 | va_end(list); | |
3485 | return -ENOMEM; | |
3486 | } | |
3487 | ||
3488 | r = strv_consume(&labels, label); | |
3489 | if (r < 0) { | |
3490 | va_end(list); | |
3491 | return r; | |
3492 | } | |
3493 | ||
3494 | /* add label length, but account for the format character */ | |
3495 | path_length += strlen(label) - 1; | |
3496 | } | |
3497 | va_end(list); | |
3498 | ||
3499 | path = malloc(path_length + 1); | |
3500 | if (!path) | |
3501 | return -ENOMEM; | |
3502 | ||
3503 | path_pos = path; | |
3504 | label_pos = labels; | |
3505 | ||
3506 | for (template_pos = path_template; *template_pos; ) { | |
3507 | sep = strchrnul(template_pos, '%'); | |
3508 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3509 | if (!*sep) | |
3510 | break; | |
3511 | ||
3512 | path_pos = stpcpy(path_pos, *label_pos++); | |
3513 | template_pos = sep + 1; | |
3514 | } | |
3515 | ||
3516 | *path_pos = 0; | |
3517 | *out = path; | |
3518 | return 0; | |
3519 | } | |
3520 | ||
3521 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3522 | _cleanup_strv_free_ char **labels = NULL; | |
3523 | const char *template_pos, *path_pos; | |
3524 | char **label_pos; | |
3525 | va_list list; | |
3526 | int r; | |
3527 | ||
3528 | /* | |
3529 | * This decodes an object-path based on a template argument. The | |
3530 | * template consists of a verbatim path, optionally including special | |
3531 | * directives: | |
3532 | * | |
3533 | * - Each occurrence of '%' in the template matches an arbitrary | |
3534 | * substring of a label in the given path. At most one such | |
3535 | * directive is allowed per label. For each such directive, the | |
3536 | * caller must provide an output parameter (char **) via va_arg. If | |
3537 | * NULL is passed, the given label is verified, but not returned. | |
3538 | * For each matched label, the *decoded* label is stored in the | |
3539 | * passed output argument, and the caller is responsible to free | |
3540 | * it. Note that the output arguments are only modified if the | |
3541 | * actualy path matched the template. Otherwise, they're left | |
3542 | * untouched. | |
3543 | * | |
3544 | * This function returns <0 on error, 0 if the path does not match the | |
3545 | * template, 1 if it matched. | |
3546 | */ | |
3547 | ||
3548 | assert_return(path, -EINVAL); | |
3549 | assert_return(path_template, -EINVAL); | |
3550 | ||
3551 | path_pos = path; | |
3552 | ||
3553 | for (template_pos = path_template; *template_pos; ) { | |
3554 | const char *sep; | |
3555 | size_t length; | |
3556 | char *label; | |
3557 | ||
3558 | /* verify everything until the next '%' matches verbatim */ | |
3559 | sep = strchrnul(template_pos, '%'); | |
3560 | length = sep - template_pos; | |
3561 | if (strncmp(path_pos, template_pos, length)) | |
3562 | return 0; | |
3563 | ||
3564 | path_pos += length; | |
3565 | template_pos += length; | |
3566 | ||
3567 | if (!*template_pos) | |
3568 | break; | |
3569 | ||
3570 | /* We found the next '%' character. Everything up until here | |
3571 | * matched. We now skip ahead to the end of this label and make | |
3572 | * sure it matches the tail of the label in the path. Then we | |
3573 | * decode the string in-between and save it for later use. */ | |
3574 | ||
3575 | ++template_pos; /* skip over '%' */ | |
3576 | ||
3577 | sep = strchrnul(template_pos, '/'); | |
3578 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3579 | ||
3580 | /* verify the suffixes match */ | |
3581 | sep = strchrnul(path_pos, '/'); | |
3582 | if (sep - path_pos < (ssize_t)length || | |
3583 | strncmp(sep - length, template_pos, length)) | |
3584 | return 0; | |
3585 | ||
3586 | template_pos += length; /* skip over matched label */ | |
3587 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3588 | ||
3589 | /* store unescaped label for later use */ | |
3590 | label = bus_label_unescape_n(path_pos, length); | |
3591 | if (!label) | |
3592 | return -ENOMEM; | |
3593 | ||
3594 | r = strv_consume(&labels, label); | |
3595 | if (r < 0) | |
3596 | return r; | |
3597 | ||
3598 | path_pos = sep; /* skip decoded label and suffix */ | |
3599 | } | |
3600 | ||
3601 | /* end of template must match end of path */ | |
3602 | if (*path_pos) | |
3603 | return 0; | |
3604 | ||
3605 | /* copy the labels over to the caller */ | |
19932084 | 3606 | va_start(list, path_template); |
dfb815c3 DH |
3607 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3608 | char **arg; | |
3609 | ||
3610 | arg = va_arg(list, char **); | |
3611 | if (arg) | |
3612 | *arg = *label_pos; | |
3613 | else | |
3614 | free(*label_pos); | |
3615 | } | |
3616 | va_end(list); | |
3617 | ||
3618 | free(labels); | |
3619 | labels = NULL; | |
3620 | return 1; | |
3621 | } | |
3622 | ||
ae095f86 LP |
3623 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3624 | int r; | |
3625 | ||
3626 | assert_return(bus, -EINVAL); | |
ae095f86 | 3627 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3628 | |
3629 | if (!bus->is_kernel) | |
15411c0c | 3630 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3631 | |
3632 | if (!BUS_IS_OPEN(bus->state)) | |
3633 | return -ENOTCONN; | |
ae095f86 | 3634 | |
bd746b8b LP |
3635 | if (bus->rqueue_size > 0) |
3636 | return -EBUSY; | |
3637 | ||
14f862a5 LP |
3638 | if (bus->wqueue_size > 0) |
3639 | return -EBUSY; | |
3640 | ||
ae095f86 LP |
3641 | r = bus_kernel_try_close(bus); |
3642 | if (r < 0) | |
3643 | return r; | |
3644 | ||
3645 | sd_bus_close(bus); | |
3646 | return 0; | |
3647 | } | |
5972fe95 | 3648 | |
455971c1 | 3649 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3650 | assert_return(bus, -EINVAL); |
455971c1 | 3651 | assert_return(description, -EINVAL); |
f4b2933e | 3652 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3653 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3654 | ||
455971c1 | 3655 | *description = bus->description; |
5972fe95 LP |
3656 | return 0; |
3657 | } | |
fe3f22d1 DK |
3658 | |
3659 | int bus_get_root_path(sd_bus *bus) { | |
3660 | int r; | |
3661 | ||
3662 | if (bus->cgroup_root) | |
3663 | return 0; | |
3664 | ||
3665 | r = cg_get_root_path(&bus->cgroup_root); | |
3666 | if (r == -ENOENT) { | |
3667 | bus->cgroup_root = strdup("/"); | |
3668 | if (!bus->cgroup_root) | |
3669 | return -ENOMEM; | |
3670 | ||
3671 | r = 0; | |
3672 | } | |
3673 | ||
3674 | return r; | |
3675 | } | |
3acc1daf LP |
3676 | |
3677 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3678 | int r; | |
3679 | ||
3680 | assert_return(bus, -EINVAL); | |
3681 | assert_return(scope, -EINVAL); | |
3682 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3683 | ||
3684 | if (bus->is_kernel) { | |
3685 | _cleanup_free_ char *n = NULL; | |
3686 | const char *dash; | |
3687 | ||
3688 | r = bus_kernel_get_bus_name(bus, &n); | |
3689 | if (r < 0) | |
3690 | return r; | |
3691 | ||
3692 | if (streq(n, "0-system")) { | |
3693 | *scope = "system"; | |
5b820358 | 3694 | return 0; |
3acc1daf LP |
3695 | } |
3696 | ||
3697 | dash = strchr(n, '-'); | |
d2df88ff | 3698 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3699 | *scope = "user"; |
5b820358 | 3700 | return 0; |
3acc1daf LP |
3701 | } |
3702 | } | |
3703 | ||
3704 | if (bus->is_user) { | |
3705 | *scope = "user"; | |
5b820358 | 3706 | return 0; |
3acc1daf LP |
3707 | } |
3708 | ||
3709 | if (bus->is_system) { | |
3710 | *scope = "system"; | |
5b820358 LP |
3711 | return 0; |
3712 | } | |
3713 | ||
3714 | return -ENODATA; | |
3715 | } | |
3716 | ||
3717 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3718 | ||
3719 | assert_return(bus, -EINVAL); | |
3720 | assert_return(address, -EINVAL); | |
3721 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3722 | ||
3723 | if (bus->address) { | |
3724 | *address = bus->address; | |
3725 | return 0; | |
3acc1daf LP |
3726 | } |
3727 | ||
3728 | return -ENODATA; | |
3729 | } | |
224b3787 | 3730 | |
882897af | 3731 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3732 | assert_return(bus, -EINVAL); |
3733 | assert_return(mask, -EINVAL); | |
3734 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3735 | ||
3736 | *mask = bus->creds_mask; | |
3737 | return 0; | |
3738 | } | |
3739 | ||
882897af | 3740 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3741 | assert_return(bus, -EINVAL); |
3742 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3743 | ||
3744 | return bus->bus_client; | |
3745 | } | |
3746 | ||
882897af | 3747 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3748 | assert_return(bus, -EINVAL); |
3749 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3750 | ||
3751 | return bus->is_server; | |
3752 | } | |
3753 | ||
882897af | 3754 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3755 | assert_return(bus, -EINVAL); |
3756 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3757 | ||
3758 | return bus->anonymous_auth; | |
3759 | } | |
3760 | ||
882897af | 3761 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3762 | assert_return(bus, -EINVAL); |
3763 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3764 | ||
3765 | return bus->trusted; | |
3766 | } | |
3767 | ||
882897af | 3768 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3769 | assert_return(bus, -EINVAL); |
3770 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3771 | ||
3772 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3773 | } | |
fa2f8973 LP |
3774 | |
3775 | static void flush_close(sd_bus *bus) { | |
3776 | if (!bus) | |
3777 | return; | |
3778 | ||
3779 | /* Flushes and closes the specified bus. We take a ref before, | |
3780 | * to ensure the flushing does not cause the bus to be | |
3781 | * unreferenced. */ | |
3782 | ||
3783 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
3784 | } | |
3785 | ||
3786 | _public_ void sd_bus_default_flush_close(void) { | |
3787 | flush_close(default_starter_bus); | |
3788 | flush_close(default_user_bus); | |
3789 | flush_close(default_system_bus); | |
3790 | } |