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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
de1c301e LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <endian.h> | |
de1c301e | 22 | #include <netdb.h> |
0a6f50c0 | 23 | #include <poll.h> |
45fbe937 | 24 | #include <pthread.h> |
cf0fbc49 TA |
25 | #include <stdlib.h> |
26 | #include <sys/mman.h> | |
27 | #include <unistd.h> | |
de1c301e | 28 | |
de1c301e | 29 | #include "sd-bus.h" |
07630cea | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
07630cea LP |
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" | |
3ffd4af2 | 47 | #include "fd-util.h" |
cf0fbc49 | 48 | #include "hexdecoct.h" |
07630cea LP |
49 | #include "hostname-util.h" |
50 | #include "macro.h" | |
51 | #include "missing.h" | |
6bedfcbb | 52 | #include "parse-util.h" |
dccca82b | 53 | #include "process-util.h" |
07630cea LP |
54 | #include "string-util.h" |
55 | #include "strv.h" | |
56 | #include "util.h" | |
de1c301e | 57 | |
b56c4604 LP |
58 | #define log_debug_bus_message(m) \ |
59 | do { \ | |
60 | sd_bus_message *_mm = (m); \ | |
e32fd6b4 | 61 | log_debug("Got message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s", \ |
b56c4604 LP |
62 | bus_message_type_to_string(_mm->header->type), \ |
63 | strna(sd_bus_message_get_sender(_mm)), \ | |
64 | strna(sd_bus_message_get_destination(_mm)), \ | |
65 | strna(sd_bus_message_get_path(_mm)), \ | |
66 | strna(sd_bus_message_get_interface(_mm)), \ | |
67 | strna(sd_bus_message_get_member(_mm)), \ | |
68 | BUS_MESSAGE_COOKIE(_mm), \ | |
69 | _mm->reply_cookie, \ | |
e32fd6b4 | 70 | strna(_mm->root_container.signature), \ |
e28d0865 | 71 | strna(_mm->error.name), \ |
b56c4604 LP |
72 | strna(_mm->error.message)); \ |
73 | } while (false) | |
f9f97ca6 | 74 | |
e3017af9 | 75 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
8a5cd31e LP |
76 | static void bus_detach_io_events(sd_bus *b); |
77 | static void bus_detach_inotify_event(sd_bus *b); | |
e3017af9 | 78 | |
fa2f8973 LP |
79 | static thread_local sd_bus *default_system_bus = NULL; |
80 | static thread_local sd_bus *default_user_bus = NULL; | |
81 | static thread_local sd_bus *default_starter_bus = NULL; | |
82 | ||
8a5cd31e | 83 | void bus_close_io_fds(sd_bus *b) { |
f54514f3 LP |
84 | assert(b); |
85 | ||
8a5cd31e | 86 | bus_detach_io_events(b); |
1e05d493 | 87 | |
0fd8d506 | 88 | if (b->input_fd != b->output_fd) |
03e334a1 | 89 | safe_close(b->output_fd); |
0fd8d506 | 90 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
91 | } |
92 | ||
8a5cd31e LP |
93 | void bus_close_inotify_fd(sd_bus *b) { |
94 | assert(b); | |
95 | ||
96 | bus_detach_inotify_event(b); | |
97 | ||
98 | b->inotify_fd = safe_close(b->inotify_fd); | |
99 | b->inotify_watches = mfree(b->inotify_watches); | |
100 | b->n_inotify_watches = 0; | |
101 | } | |
102 | ||
0e586eae | 103 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
104 | assert(b); |
105 | ||
f389bf15 LP |
106 | while (b->rqueue_size > 0) |
107 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
108 | ||
253f96e5 | 109 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 110 | b->rqueue_allocated = 0; |
0e586eae | 111 | |
f389bf15 LP |
112 | while (b->wqueue_size > 0) |
113 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 114 | |
253f96e5 | 115 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 116 | b->wqueue_allocated = 0; |
0e586eae LP |
117 | } |
118 | ||
de1c301e | 119 | static void bus_free(sd_bus *b) { |
19befb2d | 120 | sd_bus_slot *s; |
de1c301e LP |
121 | |
122 | assert(b); | |
8f8f05a9 | 123 | assert(!b->track_queue); |
232f3677 | 124 | assert(!b->tracks); |
8f8f05a9 | 125 | |
19befb2d LP |
126 | b->state = BUS_CLOSED; |
127 | ||
40ca29a1 LP |
128 | sd_bus_detach_event(b); |
129 | ||
19befb2d LP |
130 | while ((s = b->slots)) { |
131 | /* At this point only floating slots can still be | |
132 | * around, because the non-floating ones keep a | |
133 | * reference to the bus, and we thus couldn't be | |
134 | * destructing right now... We forcibly disconnect the | |
135 | * slots here, so that they still can be referenced by | |
136 | * apps, but are dead. */ | |
137 | ||
138 | assert(s->floating); | |
139 | bus_slot_disconnect(s); | |
140 | sd_bus_slot_unref(s); | |
141 | } | |
142 | ||
f4d140e9 LP |
143 | if (b->default_bus_ptr) |
144 | *b->default_bus_ptr = NULL; | |
145 | ||
8a5cd31e LP |
146 | bus_close_io_fds(b); |
147 | bus_close_inotify_fd(b); | |
de1c301e | 148 | |
c4e6556c | 149 | free(b->label); |
18ac4643 | 150 | free(b->groups); |
de1c301e | 151 | free(b->rbuffer); |
89ffcd2a | 152 | free(b->unique_name); |
2181a7f5 | 153 | free(b->auth_buffer); |
89ffcd2a | 154 | free(b->address); |
a7893c6b | 155 | free(b->machine); |
751bc6ac | 156 | free(b->cgroup_root); |
455971c1 | 157 | free(b->description); |
48ef41a3 | 158 | free(b->patch_sender); |
89ffcd2a | 159 | |
2fd9ae2e LP |
160 | free(b->exec_path); |
161 | strv_free(b->exec_argv); | |
162 | ||
2c93b4ef LP |
163 | close_many(b->fds, b->n_fds); |
164 | free(b->fds); | |
165 | ||
0e586eae | 166 | bus_reset_queues(b); |
de1c301e | 167 | |
c9fe4af7 | 168 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 169 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 170 | |
75a0da95 | 171 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
172 | bus_match_free(&b->match_callbacks); |
173 | ||
29ddb38f LP |
174 | hashmap_free_free(b->vtable_methods); |
175 | hashmap_free_free(b->vtable_properties); | |
176 | ||
19befb2d | 177 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
178 | hashmap_free(b->nodes); |
179 | ||
a132bef0 | 180 | bus_flush_memfd(b); |
bc7fd8cd | 181 | |
45fbe937 LP |
182 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
183 | ||
de1c301e LP |
184 | free(b); |
185 | } | |
186 | ||
d9f644e2 | 187 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
188 | sd_bus *r; |
189 | ||
d6888822 | 190 | assert_return(ret, -EINVAL); |
021a1e78 | 191 | |
de1c301e LP |
192 | r = new0(sd_bus, 1); |
193 | if (!r) | |
021a1e78 | 194 | return -ENOMEM; |
de1c301e | 195 | |
e4ee6e5c | 196 | r->n_ref = REFCNT_INIT; |
e82c9509 | 197 | r->input_fd = r->output_fd = -1; |
8a5cd31e | 198 | r->inotify_fd = -1; |
de1c301e | 199 | r->message_version = 1; |
3310dfd5 | 200 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c7db1984 | 201 | r->accept_fd = true; |
df0ff127 | 202 | r->original_pid = getpid_cached(); |
18ac4643 | 203 | r->n_groups = (size_t) -1; |
de1c301e | 204 | |
45fbe937 LP |
205 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
206 | ||
de1c301e LP |
207 | /* We guarantee that wqueue always has space for at least one |
208 | * entry */ | |
821e0756 | 209 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 210 | free(r); |
021a1e78 | 211 | return -ENOMEM; |
de1c301e LP |
212 | } |
213 | ||
021a1e78 LP |
214 | *ret = r; |
215 | return 0; | |
216 | } | |
217 | ||
d9f644e2 | 218 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
219 | char *a; |
220 | ||
d6888822 LP |
221 | assert_return(bus, -EINVAL); |
222 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
223 | assert_return(address, -EINVAL); | |
224 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
225 | |
226 | a = strdup(address); | |
227 | if (!a) | |
228 | return -ENOMEM; | |
229 | ||
230 | free(bus->address); | |
231 | bus->address = a; | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
d9f644e2 | 236 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
237 | assert_return(bus, -EINVAL); |
238 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
239 | assert_return(input_fd >= 0, -EBADF); |
240 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 241 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 242 | |
e82c9509 LP |
243 | bus->input_fd = input_fd; |
244 | bus->output_fd = output_fd; | |
021a1e78 LP |
245 | return 0; |
246 | } | |
247 | ||
d9f644e2 | 248 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
249 | char *p, **a; |
250 | ||
d6888822 LP |
251 | assert_return(bus, -EINVAL); |
252 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
253 | assert_return(path, -EINVAL); | |
254 | assert_return(!strv_isempty(argv), -EINVAL); | |
255 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
256 | |
257 | p = strdup(path); | |
258 | if (!p) | |
259 | return -ENOMEM; | |
260 | ||
261 | a = strv_copy(argv); | |
262 | if (!a) { | |
263 | free(p); | |
264 | return -ENOMEM; | |
265 | } | |
266 | ||
267 | free(bus->exec_path); | |
268 | strv_free(bus->exec_argv); | |
269 | ||
270 | bus->exec_path = p; | |
271 | bus->exec_argv = a; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
d9f644e2 | 276 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
277 | assert_return(bus, -EINVAL); |
278 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
48ef41a3 | 279 | assert_return(!bus->patch_sender, -EPERM); |
d6888822 | 280 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 281 | |
94bbf1ba | 282 | bus->bus_client = !!b; |
021a1e78 LP |
283 | return 0; |
284 | } | |
285 | ||
09365592 LP |
286 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
287 | assert_return(bus, -EINVAL); | |
288 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
289 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
290 | ||
c7db1984 | 291 | bus->is_monitor = b; |
09365592 LP |
292 | return 0; |
293 | } | |
294 | ||
d9f644e2 | 295 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
296 | assert_return(bus, -EINVAL); |
297 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
298 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 299 | |
c7db1984 | 300 | bus->accept_fd = b; |
264ad849 LP |
301 | return 0; |
302 | } | |
303 | ||
4fc31988 | 304 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
16be4368 | 305 | assert_return(bus, -EINVAL); |
b5dae4c7 | 306 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
307 | assert_return(!bus_pid_changed(bus), -ECHILD); |
308 | ||
c7db1984 LP |
309 | /* This is not actually supported by any of our transports these days, but we do honour it for synthetic |
310 | * replies, and maybe one day classic D-Bus learns this too */ | |
311 | bus->attach_timestamp = b; | |
b5dae4c7 | 312 | |
16be4368 KS |
313 | return 0; |
314 | } | |
315 | ||
b5dae4c7 | 316 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
16be4368 | 317 | assert_return(bus, -EINVAL); |
95c4fe82 | 318 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 319 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
320 | assert_return(!bus_pid_changed(bus), -ECHILD); |
321 | ||
5883ff60 | 322 | SET_FLAG(bus->creds_mask, mask, b); |
b5dae4c7 | 323 | |
49b832c5 | 324 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
325 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
326 | ||
b5dae4c7 | 327 | return 0; |
021a1e78 | 328 | } |
de1c301e | 329 | |
d9f644e2 | 330 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
331 | assert_return(bus, -EINVAL); |
332 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
333 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
334 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
335 | |
336 | bus->is_server = !!b; | |
98178d39 | 337 | bus->server_id = server_id; |
2181a7f5 LP |
338 | return 0; |
339 | } | |
340 | ||
d9f644e2 | 341 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
342 | assert_return(bus, -EINVAL); |
343 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
344 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
345 | |
346 | bus->anonymous_auth = !!b; | |
347 | return 0; | |
348 | } | |
349 | ||
adacb957 LP |
350 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
351 | assert_return(bus, -EINVAL); | |
352 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
353 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
354 | ||
355 | bus->trusted = !!b; | |
356 | return 0; | |
357 | } | |
358 | ||
455971c1 | 359 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 360 | assert_return(bus, -EINVAL); |
5972fe95 LP |
361 | assert_return(bus->state == BUS_UNSET, -EPERM); |
362 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
363 | ||
d1b91c99 | 364 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
365 | } |
366 | ||
c0765ddb LP |
367 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
368 | assert_return(bus, -EINVAL); | |
369 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
370 | ||
371 | bus->allow_interactive_authorization = !!b; | |
372 | return 0; | |
373 | } | |
374 | ||
375 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
376 | assert_return(bus, -EINVAL); | |
377 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
378 | ||
379 | return bus->allow_interactive_authorization; | |
380 | } | |
381 | ||
8a5cd31e LP |
382 | _public_ int sd_bus_set_watch_bind(sd_bus *bus, int b) { |
383 | assert_return(bus, -EINVAL); | |
384 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
385 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
386 | ||
387 | bus->watch_bind = b; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | _public_ int sd_bus_get_watch_bind(sd_bus *bus) { | |
392 | assert_return(bus, -EINVAL); | |
393 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
394 | ||
395 | return bus->watch_bind; | |
396 | } | |
397 | ||
b38cc8d5 LP |
398 | _public_ int sd_bus_set_connected_signal(sd_bus *bus, int b) { |
399 | assert_return(bus, -EINVAL); | |
400 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
401 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
402 | ||
403 | bus->connected_signal = b; | |
404 | return 0; | |
405 | } | |
406 | ||
407 | _public_ int sd_bus_get_connected_signal(sd_bus *bus) { | |
408 | assert_return(bus, -EINVAL); | |
409 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
410 | ||
411 | return bus->connected_signal; | |
412 | } | |
413 | ||
414 | static int synthesize_connected_signal(sd_bus *bus) { | |
415 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
416 | int r; | |
417 | ||
418 | assert(bus); | |
419 | ||
420 | /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called | |
421 | * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the | |
422 | * Hello() reply. Or in other words, whenver we enter BUS_RUNNING state. | |
423 | * | |
424 | * This is useful so that clients can start doing stuff whenver the connection is fully established in a way | |
425 | * that works independently from whether we connected to a full bus or just a direct connection. */ | |
426 | ||
427 | if (!bus->connected_signal) | |
428 | return 0; | |
429 | ||
430 | r = sd_bus_message_new_signal( | |
431 | bus, | |
432 | &m, | |
433 | "/org/freedesktop/DBus/Local", | |
434 | "org.freedesktop.DBus.Local", | |
435 | "Connected"); | |
436 | if (r < 0) | |
437 | return r; | |
438 | ||
439 | bus_message_set_sender_local(bus, m); | |
440 | ||
441 | r = bus_seal_synthetic_message(bus, m); | |
442 | if (r < 0) | |
443 | return r; | |
444 | ||
445 | r = bus_rqueue_make_room(bus); | |
446 | if (r < 0) | |
447 | return r; | |
448 | ||
449 | /* Insert at the very front */ | |
450 | memmove(bus->rqueue + 1, bus->rqueue, sizeof(sd_bus_message*) * bus->rqueue_size); | |
451 | bus->rqueue[0] = m; | |
452 | m = NULL; | |
453 | bus->rqueue_size++; | |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
3e0e196e LP |
458 | void bus_set_state(sd_bus *bus, enum bus_state state) { |
459 | ||
460 | static const char * const table[_BUS_STATE_MAX] = { | |
461 | [BUS_UNSET] = "UNSET", | |
462 | [BUS_WATCH_BIND] = "WATCH_BIND", | |
463 | [BUS_OPENING] = "OPENING", | |
464 | [BUS_AUTHENTICATING] = "AUTHENTICATING", | |
465 | [BUS_HELLO] = "HELLO", | |
466 | [BUS_RUNNING] = "RUNNING", | |
467 | [BUS_CLOSING] = "CLOSING", | |
468 | [BUS_CLOSED] = "CLOSED", | |
469 | }; | |
470 | ||
471 | assert(bus); | |
472 | assert(state < _BUS_STATE_MAX); | |
473 | ||
474 | if (state == bus->state) | |
475 | return; | |
476 | ||
477 | log_debug("Bus %s: changing state %s → %s", strna(bus->description), table[bus->state], table[state]); | |
478 | bus->state = state; | |
479 | } | |
480 | ||
19070062 | 481 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 482 | const char *s; |
19070062 | 483 | sd_bus *bus; |
de1c301e LP |
484 | int r; |
485 | ||
19070062 LP |
486 | assert(reply); |
487 | bus = reply->bus; | |
de1c301e | 488 | assert(bus); |
945c2931 | 489 | assert(IN_SET(bus->state, BUS_HELLO, BUS_CLOSING)); |
de1c301e | 490 | |
40ca29a1 | 491 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
492 | if (r > 0) |
493 | return -r; | |
eb01ba5d | 494 | |
de1c301e LP |
495 | r = sd_bus_message_read(reply, "s", &s); |
496 | if (r < 0) | |
497 | return r; | |
498 | ||
dafb7591 LP |
499 | if (!service_name_is_valid(s) || s[0] != ':') |
500 | return -EBADMSG; | |
501 | ||
de1c301e LP |
502 | bus->unique_name = strdup(s); |
503 | if (!bus->unique_name) | |
504 | return -ENOMEM; | |
505 | ||
b38cc8d5 | 506 | if (bus->state == BUS_HELLO) { |
3e0e196e | 507 | bus_set_state(bus, BUS_RUNNING); |
dafb7591 | 508 | |
b38cc8d5 LP |
509 | r = synthesize_connected_signal(bus); |
510 | if (r < 0) | |
511 | return r; | |
512 | } | |
513 | ||
de1c301e LP |
514 | return 1; |
515 | } | |
516 | ||
517 | static int bus_send_hello(sd_bus *bus) { | |
4afd3348 | 518 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
de1c301e LP |
519 | int r; |
520 | ||
521 | assert(bus); | |
522 | ||
a132bef0 | 523 | if (!bus->bus_client) |
021a1e78 LP |
524 | return 0; |
525 | ||
de1c301e LP |
526 | r = sd_bus_message_new_method_call( |
527 | bus, | |
151b9b96 | 528 | &m, |
de1c301e | 529 | "org.freedesktop.DBus", |
a7639e37 | 530 | "/org/freedesktop/DBus", |
de1c301e | 531 | "org.freedesktop.DBus", |
151b9b96 | 532 | "Hello"); |
de1c301e LP |
533 | if (r < 0) |
534 | return r; | |
535 | ||
19befb2d | 536 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
537 | } |
538 | ||
a7e3212d | 539 | int bus_start_running(sd_bus *bus) { |
ac8029fc LP |
540 | struct reply_callback *c; |
541 | Iterator i; | |
542 | usec_t n; | |
b38cc8d5 | 543 | int r; |
ac8029fc | 544 | |
de1c301e | 545 | assert(bus); |
ac8029fc LP |
546 | assert(bus->state < BUS_HELLO); |
547 | ||
548 | /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert | |
549 | * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since | |
550 | * adding a fixed value to all entries should not alter the internal order. */ | |
551 | ||
552 | n = now(CLOCK_MONOTONIC); | |
553 | ORDERED_HASHMAP_FOREACH(c, bus->reply_callbacks, i) { | |
554 | if (c->timeout_usec == 0) | |
555 | continue; | |
556 | ||
557 | c->timeout_usec = usec_add(n, c->timeout_usec); | |
558 | } | |
de1c301e | 559 | |
a132bef0 | 560 | if (bus->bus_client) { |
3e0e196e | 561 | bus_set_state(bus, BUS_HELLO); |
e3017af9 | 562 | return 1; |
de1c301e LP |
563 | } |
564 | ||
3e0e196e | 565 | bus_set_state(bus, BUS_RUNNING); |
b38cc8d5 LP |
566 | |
567 | r = synthesize_connected_signal(bus); | |
568 | if (r < 0) | |
569 | return r; | |
570 | ||
e3017af9 | 571 | return 1; |
de1c301e LP |
572 | } |
573 | ||
574 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 575 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
576 | const char *a; |
577 | char *r = NULL; | |
578 | ||
579 | assert(p); | |
580 | assert(*p); | |
de1c301e LP |
581 | assert(value); |
582 | ||
2fd9ae2e LP |
583 | if (key) { |
584 | l = strlen(key); | |
585 | if (strncmp(*p, key, l) != 0) | |
586 | return 0; | |
de1c301e | 587 | |
2fd9ae2e LP |
588 | if ((*p)[l] != '=') |
589 | return 0; | |
de1c301e | 590 | |
2fd9ae2e LP |
591 | if (*value) |
592 | return -EINVAL; | |
de1c301e | 593 | |
2fd9ae2e LP |
594 | a = *p + l + 1; |
595 | } else | |
596 | a = *p; | |
597 | ||
945c2931 | 598 | while (!IN_SET(*a, ';', ',', 0)) { |
821e0756 | 599 | char c; |
de1c301e LP |
600 | |
601 | if (*a == '%') { | |
602 | int x, y; | |
603 | ||
604 | x = unhexchar(a[1]); | |
605 | if (x < 0) { | |
606 | free(r); | |
607 | return x; | |
608 | } | |
609 | ||
610 | y = unhexchar(a[2]); | |
611 | if (y < 0) { | |
612 | free(r); | |
613 | return y; | |
614 | } | |
615 | ||
de1c301e | 616 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
617 | a += 3; |
618 | } else { | |
de1c301e | 619 | c = *a; |
89ffcd2a LP |
620 | a++; |
621 | } | |
de1c301e | 622 | |
821e0756 | 623 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 624 | return -ENOMEM; |
de1c301e | 625 | |
de1c301e LP |
626 | r[n++] = c; |
627 | } | |
628 | ||
89ffcd2a LP |
629 | if (!r) { |
630 | r = strdup(""); | |
631 | if (!r) | |
632 | return -ENOMEM; | |
633 | } else | |
634 | r[n] = 0; | |
635 | ||
636 | if (*a == ',') | |
637 | a++; | |
638 | ||
de1c301e | 639 | *p = a; |
2fd9ae2e LP |
640 | |
641 | free(*value); | |
de1c301e | 642 | *value = r; |
2fd9ae2e | 643 | |
de1c301e LP |
644 | return 1; |
645 | } | |
646 | ||
647 | static void skip_address_key(const char **p) { | |
648 | assert(p); | |
649 | assert(*p); | |
650 | ||
89ffcd2a LP |
651 | *p += strcspn(*p, ","); |
652 | ||
653 | if (**p == ',') | |
313cefa1 | 654 | (*p)++; |
de1c301e LP |
655 | } |
656 | ||
2fd9ae2e LP |
657 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
658 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
659 | size_t l; | |
de1c301e LP |
660 | int r; |
661 | ||
662 | assert(b); | |
2fd9ae2e LP |
663 | assert(p); |
664 | assert(*p); | |
665 | assert(guid); | |
de1c301e | 666 | |
945c2931 | 667 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
668 | r = parse_address_key(p, "guid", guid); |
669 | if (r < 0) | |
670 | return r; | |
671 | else if (r > 0) | |
672 | continue; | |
de1c301e | 673 | |
2fd9ae2e LP |
674 | r = parse_address_key(p, "path", &path); |
675 | if (r < 0) | |
676 | return r; | |
677 | else if (r > 0) | |
678 | continue; | |
de1c301e | 679 | |
2fd9ae2e LP |
680 | r = parse_address_key(p, "abstract", &abstract); |
681 | if (r < 0) | |
682 | return r; | |
683 | else if (r > 0) | |
684 | continue; | |
de1c301e | 685 | |
2fd9ae2e LP |
686 | skip_address_key(p); |
687 | } | |
de1c301e | 688 | |
2fd9ae2e LP |
689 | if (!path && !abstract) |
690 | return -EINVAL; | |
de1c301e | 691 | |
2fd9ae2e LP |
692 | if (path && abstract) |
693 | return -EINVAL; | |
694 | ||
695 | if (path) { | |
696 | l = strlen(path); | |
697 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
698 | return -E2BIG; | |
de1c301e | 699 | |
2fd9ae2e LP |
700 | b->sockaddr.un.sun_family = AF_UNIX; |
701 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
702 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
703 | } else if (abstract) { | |
704 | l = strlen(abstract); | |
705 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
706 | return -E2BIG; | |
707 | ||
708 | b->sockaddr.un.sun_family = AF_UNIX; | |
709 | b->sockaddr.un.sun_path[0] = 0; | |
710 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
711 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
712 | } | |
713 | ||
694859b5 LP |
714 | b->is_local = true; |
715 | ||
2fd9ae2e LP |
716 | return 0; |
717 | } | |
718 | ||
719 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
720 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 721 | int r; |
b92bea5d ZJS |
722 | struct addrinfo *result, hints = { |
723 | .ai_socktype = SOCK_STREAM, | |
724 | .ai_flags = AI_ADDRCONFIG, | |
725 | }; | |
2fd9ae2e LP |
726 | |
727 | assert(b); | |
728 | assert(p); | |
729 | assert(*p); | |
730 | assert(guid); | |
731 | ||
945c2931 | 732 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
733 | r = parse_address_key(p, "guid", guid); |
734 | if (r < 0) | |
735 | return r; | |
736 | else if (r > 0) | |
737 | continue; | |
738 | ||
739 | r = parse_address_key(p, "host", &host); | |
740 | if (r < 0) | |
741 | return r; | |
742 | else if (r > 0) | |
743 | continue; | |
744 | ||
745 | r = parse_address_key(p, "port", &port); | |
746 | if (r < 0) | |
747 | return r; | |
748 | else if (r > 0) | |
749 | continue; | |
750 | ||
751 | r = parse_address_key(p, "family", &family); | |
752 | if (r < 0) | |
753 | return r; | |
754 | else if (r > 0) | |
755 | continue; | |
756 | ||
757 | skip_address_key(p); | |
758 | } | |
759 | ||
760 | if (!host || !port) | |
761 | return -EINVAL; | |
762 | ||
2fd9ae2e LP |
763 | if (family) { |
764 | if (streq(family, "ipv4")) | |
765 | hints.ai_family = AF_INET; | |
766 | else if (streq(family, "ipv6")) | |
767 | hints.ai_family = AF_INET6; | |
768 | else | |
769 | return -EINVAL; | |
770 | } | |
771 | ||
772 | r = getaddrinfo(host, port, &hints, &result); | |
773 | if (r == EAI_SYSTEM) | |
774 | return -errno; | |
775 | else if (r != 0) | |
776 | return -EADDRNOTAVAIL; | |
777 | ||
778 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
779 | b->sockaddr_size = result->ai_addrlen; | |
780 | ||
781 | freeaddrinfo(result); | |
782 | ||
694859b5 LP |
783 | b->is_local = false; |
784 | ||
2fd9ae2e LP |
785 | return 0; |
786 | } | |
787 | ||
788 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
789 | char *path = NULL; | |
790 | unsigned n_argv = 0, j; | |
791 | char **argv = NULL; | |
821e0756 | 792 | size_t allocated = 0; |
2fd9ae2e LP |
793 | int r; |
794 | ||
795 | assert(b); | |
796 | assert(p); | |
797 | assert(*p); | |
798 | assert(guid); | |
799 | ||
945c2931 | 800 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
801 | r = parse_address_key(p, "guid", guid); |
802 | if (r < 0) | |
803 | goto fail; | |
804 | else if (r > 0) | |
805 | continue; | |
806 | ||
807 | r = parse_address_key(p, "path", &path); | |
808 | if (r < 0) | |
809 | goto fail; | |
810 | else if (r > 0) | |
811 | continue; | |
812 | ||
813 | if (startswith(*p, "argv")) { | |
814 | unsigned ul; | |
815 | ||
816 | errno = 0; | |
817 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 818 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
819 | r = -EINVAL; |
820 | goto fail; | |
821 | } | |
822 | ||
313cefa1 | 823 | (*p)++; |
2fd9ae2e LP |
824 | |
825 | if (ul >= n_argv) { | |
821e0756 | 826 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
827 | r = -ENOMEM; |
828 | goto fail; | |
829 | } | |
830 | ||
2fd9ae2e LP |
831 | n_argv = ul + 1; |
832 | } | |
833 | ||
834 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 835 | if (r < 0) |
2fd9ae2e | 836 | goto fail; |
de1c301e | 837 | |
2fd9ae2e | 838 | continue; |
de1c301e LP |
839 | } |
840 | ||
2fd9ae2e LP |
841 | skip_address_key(p); |
842 | } | |
de1c301e | 843 | |
5a0f6033 LP |
844 | if (!path) { |
845 | r = -EINVAL; | |
2fd9ae2e | 846 | goto fail; |
5a0f6033 | 847 | } |
de1c301e | 848 | |
2fd9ae2e LP |
849 | /* Make sure there are no holes in the array, with the |
850 | * exception of argv[0] */ | |
851 | for (j = 1; j < n_argv; j++) | |
852 | if (!argv[j]) { | |
853 | r = -EINVAL; | |
854 | goto fail; | |
855 | } | |
856 | ||
857 | if (argv && argv[0] == NULL) { | |
858 | argv[0] = strdup(path); | |
859 | if (!argv[0]) { | |
860 | r = -ENOMEM; | |
861 | goto fail; | |
862 | } | |
863 | } | |
de1c301e | 864 | |
2fd9ae2e LP |
865 | b->exec_path = path; |
866 | b->exec_argv = argv; | |
694859b5 LP |
867 | |
868 | b->is_local = false; | |
869 | ||
2fd9ae2e | 870 | return 0; |
de1c301e | 871 | |
2fd9ae2e LP |
872 | fail: |
873 | for (j = 0; j < n_argv; j++) | |
874 | free(argv[j]); | |
875 | ||
876 | free(argv); | |
877 | free(path); | |
878 | return r; | |
879 | } | |
880 | ||
bc9fd78c | 881 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 882 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
883 | int r; |
884 | ||
885 | assert(b); | |
886 | assert(p); | |
887 | assert(*p); | |
888 | assert(guid); | |
889 | ||
945c2931 | 890 | while (!IN_SET(**p, 0, ';')) { |
a7893c6b LP |
891 | r = parse_address_key(p, "guid", guid); |
892 | if (r < 0) | |
893 | return r; | |
894 | else if (r > 0) | |
895 | continue; | |
896 | ||
897 | r = parse_address_key(p, "machine", &machine); | |
898 | if (r < 0) | |
899 | return r; | |
900 | else if (r > 0) | |
901 | continue; | |
902 | ||
ee502e0c LP |
903 | r = parse_address_key(p, "pid", &pid); |
904 | if (r < 0) | |
905 | return r; | |
906 | else if (r > 0) | |
907 | continue; | |
908 | ||
a7893c6b LP |
909 | skip_address_key(p); |
910 | } | |
911 | ||
ee502e0c | 912 | if (!machine == !pid) |
a7893c6b LP |
913 | return -EINVAL; |
914 | ||
ee502e0c LP |
915 | if (machine) { |
916 | if (!machine_name_is_valid(machine)) | |
917 | return -EINVAL; | |
b6741478 | 918 | |
f9ecfd3b | 919 | free_and_replace(b->machine, machine); |
ee502e0c | 920 | } else { |
a1e58e8e | 921 | b->machine = mfree(b->machine); |
ee502e0c LP |
922 | } |
923 | ||
924 | if (pid) { | |
925 | r = parse_pid(pid, &b->nspid); | |
926 | if (r < 0) | |
927 | return r; | |
928 | } else | |
929 | b->nspid = 0; | |
a7893c6b LP |
930 | |
931 | b->sockaddr.un.sun_family = AF_UNIX; | |
15ca0a42 | 932 | /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */ |
df1e0204 | 933 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
fc2fffe7 | 934 | b->sockaddr_size = SOCKADDR_UN_LEN(b->sockaddr.un); |
694859b5 | 935 | b->is_local = false; |
a7893c6b LP |
936 | |
937 | return 0; | |
938 | } | |
939 | ||
2fd9ae2e LP |
940 | static void bus_reset_parsed_address(sd_bus *b) { |
941 | assert(b); | |
942 | ||
943 | zero(b->sockaddr); | |
944 | b->sockaddr_size = 0; | |
ba243e51 NK |
945 | b->exec_argv = strv_free(b->exec_argv); |
946 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 947 | b->server_id = SD_ID128_NULL; |
ba243e51 | 948 | b->machine = mfree(b->machine); |
ee502e0c | 949 | b->nspid = 0; |
2fd9ae2e LP |
950 | } |
951 | ||
952 | static int bus_parse_next_address(sd_bus *b) { | |
953 | _cleanup_free_ char *guid = NULL; | |
954 | const char *a; | |
955 | int r; | |
956 | ||
957 | assert(b); | |
958 | ||
959 | if (!b->address) | |
960 | return 0; | |
961 | if (b->address[b->address_index] == 0) | |
962 | return 0; | |
963 | ||
964 | bus_reset_parsed_address(b); | |
965 | ||
966 | a = b->address + b->address_index; | |
de1c301e | 967 | |
2fd9ae2e | 968 | while (*a != 0) { |
de1c301e | 969 | |
2fd9ae2e LP |
970 | if (*a == ';') { |
971 | a++; | |
972 | continue; | |
de1c301e LP |
973 | } |
974 | ||
2fd9ae2e LP |
975 | if (startswith(a, "unix:")) { |
976 | a += 5; | |
de1c301e | 977 | |
2fd9ae2e | 978 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
979 | if (r < 0) |
980 | return r; | |
2fd9ae2e | 981 | break; |
de1c301e | 982 | |
2fd9ae2e | 983 | } else if (startswith(a, "tcp:")) { |
de1c301e | 984 | |
2fd9ae2e LP |
985 | a += 4; |
986 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
987 | if (r < 0) |
988 | return r; | |
de1c301e | 989 | |
2fd9ae2e LP |
990 | break; |
991 | ||
992 | } else if (startswith(a, "unixexec:")) { | |
993 | ||
994 | a += 9; | |
995 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
996 | if (r < 0) |
997 | return r; | |
de1c301e | 998 | |
2fd9ae2e | 999 | break; |
de1c301e | 1000 | |
de33fc62 | 1001 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 1002 | |
146d4773 | 1003 | a += 15; |
bc9fd78c LP |
1004 | r = parse_container_unix_address(b, &a, &guid); |
1005 | if (r < 0) | |
1006 | return r; | |
1007 | ||
6629161f | 1008 | break; |
de1c301e LP |
1009 | } |
1010 | ||
2fd9ae2e LP |
1011 | a = strchr(a, ';'); |
1012 | if (!a) | |
1013 | return 0; | |
de1c301e LP |
1014 | } |
1015 | ||
1016 | if (guid) { | |
98178d39 | 1017 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
1018 | if (r < 0) |
1019 | return r; | |
1020 | } | |
1021 | ||
2fd9ae2e | 1022 | b->address_index = a - b->address; |
de1c301e LP |
1023 | return 1; |
1024 | } | |
1025 | ||
a7e3212d | 1026 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
1027 | int r; |
1028 | ||
1029 | assert(b); | |
1030 | ||
1031 | for (;;) { | |
8a5cd31e LP |
1032 | bus_close_io_fds(b); |
1033 | bus_close_inotify_fd(b); | |
a7e3212d | 1034 | |
a132bef0 ZJS |
1035 | /* If you provide multiple different bus-addresses, we |
1036 | * try all of them in order and use the first one that | |
1037 | * succeeds. */ | |
15442912 | 1038 | |
1e05d493 | 1039 | if (b->exec_path) |
a7893c6b | 1040 | r = bus_socket_exec(b); |
a132bef0 ZJS |
1041 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
1042 | r = bus_container_connect_socket(b); | |
a132bef0 ZJS |
1043 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
1044 | r = bus_socket_connect(b); | |
a132bef0 ZJS |
1045 | else |
1046 | goto next; | |
1047 | ||
1048 | if (r >= 0) { | |
8a5cd31e LP |
1049 | int q; |
1050 | ||
1051 | q = bus_attach_io_events(b); | |
1052 | if (q < 0) | |
1053 | return q; | |
1054 | ||
1055 | q = bus_attach_inotify_event(b); | |
1056 | if (q < 0) | |
1057 | return q; | |
1058 | ||
1059 | return r; | |
2fd9ae2e LP |
1060 | } |
1061 | ||
a132bef0 ZJS |
1062 | b->last_connect_error = -r; |
1063 | ||
1064 | next: | |
2fd9ae2e LP |
1065 | r = bus_parse_next_address(b); |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | if (r == 0) | |
a132bef0 | 1069 | return b->last_connect_error > 0 ? -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 | ||
a132bef0 | 1109 | return bus_socket_take_fd(b); |
021a1e78 LP |
1110 | } |
1111 | ||
d9f644e2 | 1112 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1113 | int r; |
1114 | ||
d6888822 LP |
1115 | assert_return(bus, -EINVAL); |
1116 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1117 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 1118 | |
3e0e196e | 1119 | bus_set_state(bus, BUS_OPENING); |
021a1e78 | 1120 | |
2181a7f5 LP |
1121 | if (bus->is_server && bus->bus_client) |
1122 | return -EINVAL; | |
1123 | ||
e82c9509 | 1124 | if (bus->input_fd >= 0) |
021a1e78 | 1125 | r = bus_start_fd(bus); |
a132bef0 | 1126 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->machine) |
a7e3212d | 1127 | r = bus_start_address(bus); |
021a1e78 LP |
1128 | else |
1129 | return -EINVAL; | |
1130 | ||
db9bb83f LP |
1131 | if (r < 0) { |
1132 | sd_bus_close(bus); | |
021a1e78 | 1133 | return r; |
db9bb83f | 1134 | } |
021a1e78 LP |
1135 | |
1136 | return bus_send_hello(bus); | |
1137 | } | |
1138 | ||
af08d2f9 LP |
1139 | _public_ int sd_bus_open(sd_bus **ret) { |
1140 | const char *e; | |
1141 | sd_bus *b; | |
1142 | int r; | |
1143 | ||
1144 | assert_return(ret, -EINVAL); | |
1145 | ||
1146 | /* Let's connect to the starter bus if it is set, and | |
1147 | * otherwise to the bus that is appropropriate for the scope | |
1148 | * we are running in */ | |
1149 | ||
1150 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1151 | if (e) { | |
1152 | if (streq(e, "system")) | |
1153 | return sd_bus_open_system(ret); | |
09365592 | 1154 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1155 | return sd_bus_open_user(ret); |
1156 | } | |
1157 | ||
1158 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1159 | if (!e) { | |
1160 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1161 | return sd_bus_open_user(ret); | |
1162 | else | |
1163 | return sd_bus_open_system(ret); | |
1164 | } | |
1165 | ||
1166 | r = sd_bus_new(&b); | |
1167 | if (r < 0) | |
1168 | return r; | |
1169 | ||
1170 | r = sd_bus_set_address(b, e); | |
1171 | if (r < 0) | |
1172 | goto fail; | |
1173 | ||
1174 | b->bus_client = true; | |
1175 | ||
1176 | /* We don't know whether the bus is trusted or not, so better | |
1177 | * be safe, and authenticate everything */ | |
1178 | b->trusted = false; | |
694859b5 | 1179 | b->is_local = false; |
cf226cfc | 1180 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
af08d2f9 LP |
1181 | |
1182 | r = sd_bus_start(b); | |
1183 | if (r < 0) | |
1184 | goto fail; | |
1185 | ||
1186 | *ret = b; | |
1187 | return 0; | |
1188 | ||
1189 | fail: | |
1190 | bus_free(b); | |
1191 | return r; | |
1192 | } | |
1193 | ||
09365592 | 1194 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1195 | const char *e; |
09365592 LP |
1196 | assert(b); |
1197 | ||
1198 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1199 | if (e) | |
1200 | return sd_bus_set_address(b, e); | |
1201 | ||
057171ef | 1202 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1203 | } |
1204 | ||
1205 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1206 | sd_bus *b; |
1207 | int r; | |
1208 | ||
d6888822 | 1209 | assert_return(ret, -EINVAL); |
de1c301e | 1210 | |
021a1e78 LP |
1211 | r = sd_bus_new(&b); |
1212 | if (r < 0) | |
1213 | return r; | |
1214 | ||
09365592 | 1215 | r = bus_set_address_system(b); |
e3dd987c LP |
1216 | if (r < 0) |
1217 | goto fail; | |
de1c301e | 1218 | |
94bbf1ba | 1219 | b->bus_client = true; |
5972fe95 | 1220 | b->is_system = true; |
021a1e78 | 1221 | |
adacb957 LP |
1222 | /* Let's do per-method access control on the system bus. We |
1223 | * need the caller's UID and capability set for that. */ | |
1224 | b->trusted = false; | |
cf226cfc | 1225 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
694859b5 | 1226 | b->is_local = true; |
adacb957 | 1227 | |
021a1e78 LP |
1228 | r = sd_bus_start(b); |
1229 | if (r < 0) | |
1230 | goto fail; | |
de1c301e LP |
1231 | |
1232 | *ret = b; | |
1233 | return 0; | |
021a1e78 LP |
1234 | |
1235 | fail: | |
1236 | bus_free(b); | |
1237 | return r; | |
de1c301e LP |
1238 | } |
1239 | ||
09365592 | 1240 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1241 | const char *e; |
a132bef0 | 1242 | _cleanup_free_ char *ee = NULL, *s = NULL; |
de1c301e | 1243 | |
09365592 | 1244 | assert(b); |
021a1e78 | 1245 | |
6c03089c | 1246 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1247 | if (e) |
1248 | return sd_bus_set_address(b, e); | |
1249 | ||
1250 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
a132bef0 ZJS |
1251 | if (!e) |
1252 | return -ENOENT; | |
e3dd987c | 1253 | |
a132bef0 ZJS |
1254 | ee = bus_address_escape(e); |
1255 | if (!ee) | |
1256 | return -ENOMEM; | |
de1c301e | 1257 | |
15ca0a42 | 1258 | if (asprintf(&s, DEFAULT_USER_BUS_ADDRESS_FMT, ee) < 0) |
09365592 LP |
1259 | return -ENOMEM; |
1260 | ||
a132bef0 ZJS |
1261 | b->address = s; |
1262 | s = NULL; | |
1263 | ||
09365592 LP |
1264 | return 0; |
1265 | } | |
1266 | ||
1267 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1268 | sd_bus *b; | |
1269 | int r; | |
1270 | ||
1271 | assert_return(ret, -EINVAL); | |
1272 | ||
1273 | r = sd_bus_new(&b); | |
1274 | if (r < 0) | |
1275 | return r; | |
1276 | ||
1277 | r = bus_set_address_user(b); | |
1278 | if (r < 0) | |
4f6631c8 | 1279 | goto fail; |
09365592 | 1280 | |
94bbf1ba | 1281 | b->bus_client = true; |
5972fe95 | 1282 | b->is_user = true; |
de1c301e | 1283 | |
adacb957 LP |
1284 | /* We don't do any per-method access control on the user |
1285 | * bus. */ | |
1286 | b->trusted = true; | |
694859b5 | 1287 | b->is_local = true; |
adacb957 | 1288 | |
021a1e78 | 1289 | r = sd_bus_start(b); |
2571ead1 LP |
1290 | if (r < 0) |
1291 | goto fail; | |
de1c301e LP |
1292 | |
1293 | *ret = b; | |
1294 | return 0; | |
2571ead1 LP |
1295 | |
1296 | fail: | |
021a1e78 | 1297 | bus_free(b); |
2571ead1 | 1298 | return r; |
de1c301e LP |
1299 | } |
1300 | ||
09365592 | 1301 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1302 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1303 | char *m = NULL, *c = NULL; |
0f8bd8de | 1304 | |
09365592 LP |
1305 | assert(b); |
1306 | assert(host); | |
0f8bd8de | 1307 | |
7f0d207d LP |
1308 | /* Let's see if we shall enter some container */ |
1309 | m = strchr(host, ':'); | |
1310 | if (m) { | |
1311 | m++; | |
1312 | ||
1313 | /* Let's make sure this is not a port of some kind, | |
1314 | * and is a valid machine name. */ | |
1315 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1316 | char *t; | |
1317 | ||
1318 | /* Cut out the host part */ | |
1319 | t = strndupa(host, m - host - 1); | |
1320 | e = bus_address_escape(t); | |
1321 | if (!e) | |
1322 | return -ENOMEM; | |
1323 | ||
58c6e4a2 | 1324 | c = strjoina(",argv5=--machine=", m); |
7f0d207d LP |
1325 | } |
1326 | } | |
1327 | ||
1328 | if (!e) { | |
1329 | e = bus_address_escape(host); | |
1330 | if (!e) | |
1331 | return -ENOMEM; | |
1332 | } | |
0f8bd8de | 1333 | |
58c6e4a2 | 1334 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=--,argv3=", e, ",argv4=systemd-stdio-bridge", c); |
09365592 | 1335 | if (!b->address) |
0f8bd8de | 1336 | return -ENOMEM; |
a7893c6b | 1337 | |
09365592 LP |
1338 | return 0; |
1339 | } | |
1340 | ||
1341 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1342 | sd_bus *bus; | |
1343 | int r; | |
1344 | ||
1345 | assert_return(host, -EINVAL); | |
1346 | assert_return(ret, -EINVAL); | |
1347 | ||
a7893c6b | 1348 | r = sd_bus_new(&bus); |
09365592 | 1349 | if (r < 0) |
a7893c6b | 1350 | return r; |
a7893c6b | 1351 | |
09365592 LP |
1352 | r = bus_set_address_system_remote(bus, host); |
1353 | if (r < 0) | |
1354 | goto fail; | |
1355 | ||
a7893c6b | 1356 | bus->bus_client = true; |
09365592 | 1357 | bus->trusted = false; |
3acc1daf | 1358 | bus->is_system = true; |
694859b5 | 1359 | bus->is_local = false; |
a7893c6b LP |
1360 | |
1361 | r = sd_bus_start(bus); | |
09365592 LP |
1362 | if (r < 0) |
1363 | goto fail; | |
a7893c6b LP |
1364 | |
1365 | *ret = bus; | |
1366 | return 0; | |
09365592 LP |
1367 | |
1368 | fail: | |
1369 | bus_free(bus); | |
1370 | return r; | |
a7893c6b LP |
1371 | } |
1372 | ||
de33fc62 | 1373 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1374 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1375 | |
09365592 LP |
1376 | assert(b); |
1377 | assert(machine); | |
a7893c6b LP |
1378 | |
1379 | e = bus_address_escape(machine); | |
1380 | if (!e) | |
1381 | return -ENOMEM; | |
1382 | ||
a132bef0 | 1383 | b->address = strjoin("x-machine-unix:machine=", e); |
09365592 | 1384 | if (!b->address) |
a7893c6b | 1385 | return -ENOMEM; |
0f8bd8de | 1386 | |
09365592 LP |
1387 | return 0; |
1388 | } | |
1389 | ||
de33fc62 | 1390 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1391 | sd_bus *bus; |
1392 | int r; | |
1393 | ||
1394 | assert_return(machine, -EINVAL); | |
1395 | assert_return(ret, -EINVAL); | |
affcf189 | 1396 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1397 | |
0f8bd8de | 1398 | r = sd_bus_new(&bus); |
09365592 | 1399 | if (r < 0) |
0f8bd8de | 1400 | return r; |
0f8bd8de | 1401 | |
de33fc62 | 1402 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1403 | if (r < 0) |
1404 | goto fail; | |
1405 | ||
0f8bd8de | 1406 | bus->bus_client = true; |
09365592 | 1407 | bus->trusted = false; |
3acc1daf | 1408 | bus->is_system = true; |
694859b5 | 1409 | bus->is_local = false; |
0f8bd8de LP |
1410 | |
1411 | r = sd_bus_start(bus); | |
09365592 LP |
1412 | if (r < 0) |
1413 | goto fail; | |
0f8bd8de LP |
1414 | |
1415 | *ret = bus; | |
1416 | return 0; | |
09365592 LP |
1417 | |
1418 | fail: | |
1419 | bus_free(bus); | |
1420 | return r; | |
0f8bd8de LP |
1421 | } |
1422 | ||
d9f644e2 | 1423 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1424 | |
de1c301e LP |
1425 | if (!bus) |
1426 | return; | |
d5a2b9a6 LP |
1427 | if (bus->state == BUS_CLOSED) |
1428 | return; | |
1429 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1430 | return; |
1431 | ||
3e0e196e | 1432 | bus_set_state(bus, BUS_CLOSED); |
e82c9509 | 1433 | |
40ca29a1 LP |
1434 | sd_bus_detach_event(bus); |
1435 | ||
0e586eae LP |
1436 | /* Drop all queued messages so that they drop references to |
1437 | * the bus object and the bus may be freed */ | |
1438 | bus_reset_queues(bus); | |
1439 | ||
8a5cd31e LP |
1440 | bus_close_io_fds(bus); |
1441 | bus_close_inotify_fd(bus); | |
de1c301e LP |
1442 | } |
1443 | ||
03976f7b LP |
1444 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1445 | ||
1446 | if (!bus) | |
1447 | return NULL; | |
1448 | ||
1449 | sd_bus_flush(bus); | |
1450 | sd_bus_close(bus); | |
1451 | ||
1452 | return sd_bus_unref(bus); | |
1453 | } | |
1454 | ||
98c5bbc8 | 1455 | void bus_enter_closing(sd_bus *bus) { |
718db961 LP |
1456 | assert(bus); |
1457 | ||
8a5cd31e | 1458 | if (!IN_SET(bus->state, BUS_WATCH_BIND, BUS_OPENING, BUS_AUTHENTICATING, BUS_HELLO, BUS_RUNNING)) |
718db961 LP |
1459 | return; |
1460 | ||
3e0e196e | 1461 | bus_set_state(bus, BUS_CLOSING); |
718db961 LP |
1462 | } |
1463 | ||
d9f644e2 | 1464 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
4afd3348 LP |
1465 | |
1466 | if (!bus) | |
1467 | return NULL; | |
de1c301e | 1468 | |
e4ee6e5c | 1469 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1470 | |
de1c301e LP |
1471 | return bus; |
1472 | } | |
1473 | ||
d9f644e2 | 1474 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1475 | unsigned i; |
5b1bc83f LP |
1476 | |
1477 | if (!bus) | |
1478 | return NULL; | |
de1c301e | 1479 | |
f389bf15 LP |
1480 | i = REFCNT_DEC(bus->n_ref); |
1481 | if (i > 0) | |
1482 | return NULL; | |
1483 | ||
1484 | bus_free(bus); | |
de1c301e LP |
1485 | return NULL; |
1486 | } | |
1487 | ||
d9f644e2 | 1488 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1489 | |
1490 | assert_return(bus, -EINVAL); | |
1491 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1492 | |
f54514f3 | 1493 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1494 | } |
1495 | ||
bdbc8669 LP |
1496 | _public_ int sd_bus_is_ready(sd_bus *bus) { |
1497 | assert_return(bus, -EINVAL); | |
1498 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1499 | ||
1500 | return bus->state == BUS_RUNNING; | |
1501 | } | |
1502 | ||
d9f644e2 | 1503 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1504 | int r; |
1505 | ||
d6888822 LP |
1506 | assert_return(bus, -EINVAL); |
1507 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1508 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1509 | |
c7db1984 | 1510 | if (bus->is_monitor) |
09365592 LP |
1511 | return 0; |
1512 | ||
d728d708 | 1513 | if (type == SD_BUS_TYPE_UNIX_FD) { |
c7db1984 | 1514 | if (!bus->accept_fd) |
021a1e78 LP |
1515 | return 0; |
1516 | ||
20902f3e | 1517 | r = bus_ensure_running(bus); |
d728d708 LP |
1518 | if (r < 0) |
1519 | return r; | |
de1c301e | 1520 | |
d728d708 LP |
1521 | return bus->can_fds; |
1522 | } | |
1523 | ||
1524 | return bus_type_is_valid(type); | |
de1c301e LP |
1525 | } |
1526 | ||
5c302692 | 1527 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1528 | int r; |
de1c301e | 1529 | |
d6888822 | 1530 | assert_return(bus, -EINVAL); |
f7fce345 | 1531 | assert_return(id, -EINVAL); |
d6888822 | 1532 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1533 | |
20902f3e | 1534 | r = bus_ensure_running(bus); |
d728d708 LP |
1535 | if (r < 0) |
1536 | return r; | |
de1c301e | 1537 | |
f7fce345 | 1538 | *id = bus->server_id; |
d728d708 | 1539 | return 0; |
de1c301e LP |
1540 | } |
1541 | ||
3df7a7e6 | 1542 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
48ef41a3 LP |
1543 | int r; |
1544 | ||
7adc46fc | 1545 | assert(b); |
de1c301e LP |
1546 | assert(m); |
1547 | ||
aea93deb LP |
1548 | if (m->sealed) { |
1549 | /* If we copy the same message to multiple | |
693eb9a2 | 1550 | * destinations, avoid using the same cookie |
aea93deb | 1551 | * numbers. */ |
693eb9a2 | 1552 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1553 | return 0; |
aea93deb | 1554 | } |
de1c301e | 1555 | |
3df7a7e6 LP |
1556 | if (timeout == 0) |
1557 | timeout = BUS_DEFAULT_TIMEOUT; | |
1558 | ||
48ef41a3 LP |
1559 | if (!m->sender && b->patch_sender) { |
1560 | r = sd_bus_message_set_sender(m, b->patch_sender); | |
1561 | if (r < 0) | |
1562 | return r; | |
1563 | } | |
1564 | ||
75bcbcf2 | 1565 | return sd_bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1566 | } |
1567 | ||
e1c433c6 | 1568 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1569 | bool remarshal = false; |
1570 | ||
e1c433c6 LP |
1571 | assert(b); |
1572 | ||
908b8a42 DH |
1573 | /* wrong packet version */ |
1574 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1575 | remarshal = true; | |
1576 | ||
1577 | /* wrong packet endianness */ | |
1578 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1579 | remarshal = true; | |
1580 | ||
908b8a42 | 1581 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1582 | } |
1583 | ||
7adc46fc LP |
1584 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1585 | assert(b); | |
1586 | assert(m); | |
1587 | ||
52cd5877 LP |
1588 | /* Fake some timestamps, if they were requested, and not |
1589 | * already initialized */ | |
c7db1984 | 1590 | if (b->attach_timestamp) { |
52cd5877 LP |
1591 | if (m->realtime <= 0) |
1592 | m->realtime = now(CLOCK_REALTIME); | |
1593 | ||
1594 | if (m->monotonic <= 0) | |
1595 | m->monotonic = now(CLOCK_MONOTONIC); | |
1596 | } | |
1597 | ||
7adc46fc LP |
1598 | /* The bus specification says the serial number cannot be 0, |
1599 | * hence let's fill something in for synthetic messages. Since | |
1600 | * synthetic messages might have a fake sender and we don't | |
1601 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1602 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1603 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1604 | * even though kdbus can do 64bit. */ | |
75bcbcf2 | 1605 | return sd_bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1606 | } |
1607 | ||
66baf8c6 | 1608 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) { |
2e3db52d LP |
1609 | int r; |
1610 | ||
718db961 | 1611 | assert(bus); |
2e3db52d | 1612 | assert(m); |
718db961 | 1613 | |
a132bef0 | 1614 | r = bus_socket_write_message(bus, m, idx); |
2e3db52d LP |
1615 | if (r <= 0) |
1616 | return r; | |
1617 | ||
a132bef0 | 1618 | if (*idx >= BUS_MESSAGE_SIZE(m)) |
e32fd6b4 | 1619 | log_debug("Sent message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s", |
2e3db52d LP |
1620 | bus_message_type_to_string(m->header->type), |
1621 | strna(sd_bus_message_get_sender(m)), | |
1622 | strna(sd_bus_message_get_destination(m)), | |
1623 | strna(sd_bus_message_get_path(m)), | |
1624 | strna(sd_bus_message_get_interface(m)), | |
1625 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1626 | BUS_MESSAGE_COOKIE(m), |
1627 | m->reply_cookie, | |
e32fd6b4 | 1628 | strna(m->root_container.signature), |
e28d0865 | 1629 | strna(m->error.name), |
2e3db52d LP |
1630 | strna(m->error.message)); |
1631 | ||
1632 | return r; | |
718db961 LP |
1633 | } |
1634 | ||
de1c301e | 1635 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1636 | int r, ret = 0; |
de1c301e LP |
1637 | |
1638 | assert(bus); | |
945c2931 | 1639 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1640 | |
de1c301e LP |
1641 | while (bus->wqueue_size > 0) { |
1642 | ||
66baf8c6 | 1643 | r = bus_write_message(bus, bus->wqueue[0], &bus->windex); |
718db961 | 1644 | if (r < 0) |
de1c301e | 1645 | return r; |
718db961 | 1646 | else if (r == 0) |
e3017af9 LP |
1647 | /* Didn't do anything this time */ |
1648 | return ret; | |
a132bef0 | 1649 | else if (bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1650 | /* Fully written. Let's drop the entry from |
1651 | * the queue. | |
1652 | * | |
1653 | * This isn't particularly optimized, but | |
1654 | * well, this is supposed to be our worst-case | |
1655 | * buffer only, and the socket buffer is | |
1656 | * supposed to be our primary buffer, and if | |
1657 | * it got full, then all bets are off | |
1658 | * anyway. */ | |
1659 | ||
313cefa1 | 1660 | bus->wqueue_size--; |
c4e6e242 | 1661 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1662 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1663 | bus->windex = 0; | |
1664 | ||
e3017af9 | 1665 | ret = 1; |
de1c301e LP |
1666 | } |
1667 | } | |
1668 | ||
e3017af9 | 1669 | return ret; |
de1c301e LP |
1670 | } |
1671 | ||
766c5809 | 1672 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1673 | assert(bus); |
1674 | ||
a132bef0 | 1675 | return bus_socket_read_message(bus); |
7d22c717 LP |
1676 | } |
1677 | ||
7adc46fc | 1678 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1679 | assert(bus); |
7d22c717 | 1680 | |
821e0756 | 1681 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1682 | return -ENOBUFS; |
1683 | ||
821e0756 | 1684 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1685 | return -ENOMEM; |
1686 | ||
7d22c717 LP |
1687 | return 0; |
1688 | } | |
1689 | ||
766c5809 | 1690 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1691 | int r, ret = 0; |
de1c301e LP |
1692 | |
1693 | assert(bus); | |
1694 | assert(m); | |
945c2931 | 1695 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1696 | |
766c5809 LP |
1697 | /* Note that the priority logic is only available on kdbus, |
1698 | * where the rqueue is unused. We check the rqueue here | |
1699 | * anyway, because it's simple... */ | |
1700 | ||
7d22c717 LP |
1701 | for (;;) { |
1702 | if (bus->rqueue_size > 0) { | |
1703 | /* Dispatch a queued message */ | |
de1c301e | 1704 | |
7d22c717 | 1705 | *m = bus->rqueue[0]; |
313cefa1 | 1706 | bus->rqueue_size--; |
7d22c717 LP |
1707 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); |
1708 | return 1; | |
1709 | } | |
de1c301e | 1710 | |
7d22c717 | 1711 | /* Try to read a new message */ |
766c5809 | 1712 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1713 | if (r < 0) |
e3017af9 | 1714 | return r; |
e3017af9 LP |
1715 | if (r == 0) |
1716 | return ret; | |
de1c301e | 1717 | |
2e8d788c | 1718 | ret = 1; |
7d22c717 | 1719 | } |
de1c301e LP |
1720 | } |
1721 | ||
66baf8c6 | 1722 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie) { |
4afd3348 | 1723 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1724 | int r; |
1725 | ||
d6888822 | 1726 | assert_return(m, -EINVAL); |
9030ca46 LP |
1727 | |
1728 | if (!bus) | |
1729 | bus = m->bus; | |
1730 | ||
d6888822 | 1731 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 1732 | |
a3d59cd1 LP |
1733 | if (!BUS_IS_OPEN(bus->state)) |
1734 | return -ENOTCONN; | |
1735 | ||
021a1e78 LP |
1736 | if (m->n_fds > 0) { |
1737 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1738 | if (r < 0) | |
1739 | return r; | |
1740 | if (r == 0) | |
15411c0c | 1741 | return -EOPNOTSUPP; |
021a1e78 | 1742 | } |
de1c301e | 1743 | |
693eb9a2 | 1744 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1745 | * is expected */ |
693eb9a2 | 1746 | if (!cookie && !m->sealed) |
0461f8cd | 1747 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1748 | |
3df7a7e6 | 1749 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1750 | if (r < 0) |
1751 | return r; | |
1752 | ||
441d56a1 | 1753 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1754 | * message and place a replacement in m */ |
1755 | r = bus_remarshal_message(bus, &m); | |
1756 | if (r < 0) | |
1757 | return r; | |
1758 | ||
5407f2de LP |
1759 | /* If this is a reply and no reply was requested, then let's |
1760 | * suppress this, if we can */ | |
997eadb5 LP |
1761 | if (m->dont_send) |
1762 | goto finish; | |
5407f2de | 1763 | |
945c2931 | 1764 | if (IN_SET(bus->state, BUS_RUNNING, BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1765 | size_t idx = 0; |
1766 | ||
66baf8c6 | 1767 | r = bus_write_message(bus, m, &idx); |
32f46480 | 1768 | if (r < 0) { |
103a5027 | 1769 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1770 | bus_enter_closing(bus); |
441d56a1 LP |
1771 | return -ECONNRESET; |
1772 | } | |
32f46480 | 1773 | |
de1c301e | 1774 | return r; |
997eadb5 LP |
1775 | } |
1776 | ||
a132bef0 | 1777 | if (idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1778 | /* Wasn't fully written. So let's remember how |
1779 | * much was written. Note that the first entry | |
1780 | * of the wqueue array is always allocated so | |
1781 | * that we always can remember how much was | |
1782 | * written. */ | |
1783 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1784 | bus->wqueue_size = 1; | |
1785 | bus->windex = idx; | |
1786 | } | |
997eadb5 | 1787 | |
de1c301e | 1788 | } else { |
de1c301e LP |
1789 | /* Just append it to the queue. */ |
1790 | ||
25220239 | 1791 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1792 | return -ENOBUFS; |
1793 | ||
821e0756 | 1794 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1795 | return -ENOMEM; |
1796 | ||
313cefa1 | 1797 | bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); |
de1c301e LP |
1798 | } |
1799 | ||
997eadb5 | 1800 | finish: |
693eb9a2 LP |
1801 | if (cookie) |
1802 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1803 | |
7a37d625 | 1804 | return 1; |
de1c301e LP |
1805 | } |
1806 | ||
693eb9a2 | 1807 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1808 | int r; |
1809 | ||
911121a7 | 1810 | assert_return(m, -EINVAL); |
9030ca46 LP |
1811 | |
1812 | if (!bus) | |
1813 | bus = m->bus; | |
1814 | ||
911121a7 LP |
1815 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1816 | ||
a3d59cd1 LP |
1817 | if (!BUS_IS_OPEN(bus->state)) |
1818 | return -ENOTCONN; | |
1819 | ||
911121a7 LP |
1820 | if (!streq_ptr(m->destination, destination)) { |
1821 | ||
1822 | if (!destination) | |
1823 | return -EEXIST; | |
1824 | ||
1825 | r = sd_bus_message_set_destination(m, destination); | |
1826 | if (r < 0) | |
1827 | return r; | |
1828 | } | |
1829 | ||
693eb9a2 | 1830 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1831 | } |
1832 | ||
ac8029fc LP |
1833 | static usec_t calc_elapse(sd_bus *bus, uint64_t usec) { |
1834 | assert(bus); | |
1835 | ||
de1c301e LP |
1836 | if (usec == (uint64_t) -1) |
1837 | return 0; | |
1838 | ||
ac8029fc LP |
1839 | /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel |
1840 | * with any connection setup states. Hence, if a method callback is started earlier than that we just store the | |
1841 | * relative timestamp, and afterwards the absolute one. */ | |
1842 | ||
1843 | if (IN_SET(bus->state, BUS_WATCH_BIND, BUS_OPENING, BUS_AUTHENTICATING)) | |
1844 | return usec; | |
1845 | else | |
1846 | return now(CLOCK_MONOTONIC) + usec; | |
de1c301e LP |
1847 | } |
1848 | ||
e3017af9 LP |
1849 | static int timeout_compare(const void *a, const void *b) { |
1850 | const struct reply_callback *x = a, *y = b; | |
1851 | ||
ac8029fc | 1852 | if (x->timeout_usec != 0 && y->timeout_usec == 0) |
e3017af9 LP |
1853 | return -1; |
1854 | ||
ac8029fc | 1855 | if (x->timeout_usec == 0 && y->timeout_usec != 0) |
e3017af9 LP |
1856 | return 1; |
1857 | ||
ac8029fc | 1858 | if (x->timeout_usec < y->timeout_usec) |
e3017af9 LP |
1859 | return -1; |
1860 | ||
ac8029fc | 1861 | if (x->timeout_usec > y->timeout_usec) |
e3017af9 LP |
1862 | return 1; |
1863 | ||
1864 | return 0; | |
1865 | } | |
1866 | ||
c49b30a2 | 1867 | _public_ int sd_bus_call_async( |
de1c301e | 1868 | sd_bus *bus, |
19befb2d | 1869 | sd_bus_slot **slot, |
e1c433c6 | 1870 | sd_bus_message *_m, |
52f3ba91 | 1871 | sd_bus_message_handler_t callback, |
de1c301e | 1872 | void *userdata, |
19befb2d | 1873 | uint64_t usec) { |
de1c301e | 1874 | |
4afd3348 LP |
1875 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
1876 | _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; | |
de1c301e LP |
1877 | int r; |
1878 | ||
d6888822 | 1879 | assert_return(m, -EINVAL); |
40ca29a1 | 1880 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
dbc526f0 | 1881 | assert_return(!m->sealed || (!!callback == !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)), -EINVAL); |
9030ca46 LP |
1882 | |
1883 | if (!bus) | |
1884 | bus = m->bus; | |
1885 | ||
d6888822 | 1886 | assert_return(!bus_pid_changed(bus), -ECHILD); |
89ffcd2a | 1887 | |
a3d59cd1 LP |
1888 | if (!BUS_IS_OPEN(bus->state)) |
1889 | return -ENOTCONN; | |
1890 | ||
dbc526f0 LP |
1891 | /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */ |
1892 | if (!callback && !slot && !m->sealed) | |
1893 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1894 | ||
c9fe4af7 | 1895 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1896 | if (r < 0) |
1897 | return r; | |
de1c301e | 1898 | |
3df7a7e6 LP |
1899 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1900 | if (r < 0) | |
1901 | return r; | |
e3017af9 | 1902 | |
3df7a7e6 | 1903 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1904 | if (r < 0) |
1905 | return r; | |
1906 | ||
e1c433c6 LP |
1907 | r = bus_remarshal_message(bus, &m); |
1908 | if (r < 0) | |
1909 | return r; | |
1910 | ||
dbc526f0 LP |
1911 | if (slot || callback) { |
1912 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); | |
1913 | if (!s) | |
1914 | return -ENOMEM; | |
de1c301e | 1915 | |
dbc526f0 | 1916 | s->reply_callback.callback = callback; |
de1c301e | 1917 | |
dbc526f0 LP |
1918 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
1919 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); | |
e3017af9 | 1920 | if (r < 0) { |
dbc526f0 | 1921 | s->reply_callback.cookie = 0; |
e3017af9 LP |
1922 | return r; |
1923 | } | |
dbc526f0 LP |
1924 | |
1925 | s->reply_callback.timeout_usec = calc_elapse(bus, m->timeout); | |
1926 | if (s->reply_callback.timeout_usec != 0) { | |
1927 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
1928 | if (r < 0) { | |
1929 | s->reply_callback.timeout_usec = 0; | |
1930 | return r; | |
1931 | } | |
1932 | } | |
e3017af9 LP |
1933 | } |
1934 | ||
dbc526f0 | 1935 | r = sd_bus_send(bus, m, s ? &s->reply_callback.cookie : NULL); |
19befb2d | 1936 | if (r < 0) |
de1c301e | 1937 | return r; |
de1c301e | 1938 | |
19befb2d LP |
1939 | if (slot) |
1940 | *slot = s; | |
1941 | s = NULL; | |
e3017af9 | 1942 | |
19befb2d | 1943 | return r; |
de1c301e LP |
1944 | } |
1945 | ||
20902f3e | 1946 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1947 | int r; |
1948 | ||
1949 | assert(bus); | |
1950 | ||
945c2931 | 1951 | if (IN_SET(bus->state, BUS_UNSET, BUS_CLOSED, BUS_CLOSING)) |
021a1e78 | 1952 | return -ENOTCONN; |
d728d708 LP |
1953 | if (bus->state == BUS_RUNNING) |
1954 | return 1; | |
89ffcd2a LP |
1955 | |
1956 | for (;;) { | |
1957 | r = sd_bus_process(bus, NULL); | |
1958 | if (r < 0) | |
1959 | return r; | |
d728d708 LP |
1960 | if (bus->state == BUS_RUNNING) |
1961 | return 1; | |
e3017af9 LP |
1962 | if (r > 0) |
1963 | continue; | |
89ffcd2a LP |
1964 | |
1965 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1966 | if (r < 0) | |
1967 | return r; | |
1968 | } | |
1969 | } | |
1970 | ||
97f82db3 | 1971 | _public_ int sd_bus_call( |
de1c301e | 1972 | sd_bus *bus, |
97f82db3 | 1973 | sd_bus_message *_m, |
de1c301e LP |
1974 | uint64_t usec, |
1975 | sd_bus_error *error, | |
1976 | sd_bus_message **reply) { | |
1977 | ||
4afd3348 | 1978 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1979 | usec_t timeout; |
693eb9a2 | 1980 | uint64_t cookie; |
7d22c717 LP |
1981 | unsigned i; |
1982 | int r; | |
de1c301e | 1983 | |
759e02e7 LP |
1984 | bus_assert_return(m, -EINVAL, error); |
1985 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
1986 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
1987 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
1988 | |
1989 | if (!bus) | |
1990 | bus = m->bus; | |
1991 | ||
759e02e7 | 1992 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
97f82db3 | 1993 | |
759e02e7 LP |
1994 | if (!BUS_IS_OPEN(bus->state)) { |
1995 | r = -ENOTCONN; | |
1996 | goto fail; | |
1997 | } | |
a3d59cd1 | 1998 | |
97f82db3 KS |
1999 | r = bus_ensure_running(bus); |
2000 | if (r < 0) | |
759e02e7 | 2001 | goto fail; |
97f82db3 | 2002 | |
a43b9ca3 | 2003 | i = bus->rqueue_size; |
97f82db3 KS |
2004 | |
2005 | r = bus_seal_message(bus, m, usec); | |
2006 | if (r < 0) | |
759e02e7 | 2007 | goto fail; |
97f82db3 KS |
2008 | |
2009 | r = bus_remarshal_message(bus, &m); | |
2010 | if (r < 0) | |
759e02e7 | 2011 | goto fail; |
97f82db3 | 2012 | |
66baf8c6 | 2013 | r = sd_bus_send(bus, m, &cookie); |
de1c301e | 2014 | if (r < 0) |
759e02e7 | 2015 | goto fail; |
de1c301e | 2016 | |
ac8029fc | 2017 | timeout = calc_elapse(bus, m->timeout); |
de1c301e LP |
2018 | |
2019 | for (;;) { | |
2020 | usec_t left; | |
de1c301e | 2021 | |
7d22c717 LP |
2022 | while (i < bus->rqueue_size) { |
2023 | sd_bus_message *incoming = NULL; | |
2024 | ||
2025 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2026 | |
693eb9a2 | 2027 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2028 | /* Found a match! */ |
2029 | ||
7d22c717 LP |
2030 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2031 | bus->rqueue_size--; | |
f9f97ca6 | 2032 | log_debug_bus_message(incoming); |
7d22c717 | 2033 | |
40ca29a1 | 2034 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2035 | |
c7db1984 | 2036 | if (incoming->n_fds <= 0 || bus->accept_fd) { |
2ce97e2b LP |
2037 | if (reply) |
2038 | *reply = incoming; | |
2039 | else | |
2040 | sd_bus_message_unref(incoming); | |
2041 | ||
2042 | return 1; | |
2043 | } | |
2044 | ||
2045 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2046 | sd_bus_message_unref(incoming); |
2047 | return r; | |
b7f247e0 | 2048 | |
759e02e7 | 2049 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2050 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2051 | sd_bus_message_unref(incoming); |
2052 | return r; | |
2053 | } else { | |
a43b9ca3 | 2054 | r = -EIO; |
759e02e7 LP |
2055 | goto fail; |
2056 | } | |
a8a07f89 | 2057 | |
693eb9a2 | 2058 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2059 | bus->unique_name && |
2060 | incoming->sender && | |
2061 | streq(bus->unique_name, incoming->sender)) { | |
2062 | ||
7d22c717 LP |
2063 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2064 | bus->rqueue_size--; | |
2065 | ||
a8a07f89 LP |
2066 | /* Our own message? Somebody is trying |
2067 | * to send its own client a message, | |
2068 | * let's not dead-lock, let's fail | |
2069 | * immediately. */ | |
2070 | ||
2071 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2072 | r = -ELOOP; |
2073 | goto fail; | |
de1c301e LP |
2074 | } |
2075 | ||
de1c301e | 2076 | /* Try to read more, right-away */ |
7d22c717 | 2077 | i++; |
de1c301e | 2078 | } |
7d22c717 | 2079 | |
766c5809 | 2080 | r = bus_read_message(bus, false, 0); |
32f46480 | 2081 | if (r < 0) { |
103a5027 | 2082 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2083 | bus_enter_closing(bus); |
759e02e7 | 2084 | r = -ECONNRESET; |
441d56a1 | 2085 | } |
32f46480 | 2086 | |
759e02e7 | 2087 | goto fail; |
32f46480 | 2088 | } |
7d22c717 | 2089 | if (r > 0) |
e3017af9 | 2090 | continue; |
de1c301e LP |
2091 | |
2092 | if (timeout > 0) { | |
2093 | usec_t n; | |
2094 | ||
2095 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2096 | if (n >= timeout) { |
2097 | r = -ETIMEDOUT; | |
2098 | goto fail; | |
2099 | } | |
de1c301e LP |
2100 | |
2101 | left = timeout - n; | |
2102 | } else | |
2103 | left = (uint64_t) -1; | |
2104 | ||
e3017af9 | 2105 | r = bus_poll(bus, true, left); |
de1c301e | 2106 | if (r < 0) |
759e02e7 LP |
2107 | goto fail; |
2108 | if (r == 0) { | |
2109 | r = -ETIMEDOUT; | |
2110 | goto fail; | |
2111 | } | |
de1c301e LP |
2112 | |
2113 | r = dispatch_wqueue(bus); | |
32f46480 | 2114 | if (r < 0) { |
103a5027 | 2115 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2116 | bus_enter_closing(bus); |
759e02e7 | 2117 | r = -ECONNRESET; |
441d56a1 | 2118 | } |
32f46480 | 2119 | |
759e02e7 | 2120 | goto fail; |
32f46480 | 2121 | } |
de1c301e | 2122 | } |
759e02e7 LP |
2123 | |
2124 | fail: | |
2125 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2126 | } |
2127 | ||
d9f644e2 | 2128 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2129 | |
2130 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2131 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2132 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2133 | |
8a5cd31e LP |
2134 | if (bus->state == BUS_CLOSED) |
2135 | return -ENOTCONN; | |
2136 | ||
2137 | if (bus->inotify_fd >= 0) | |
2138 | return bus->inotify_fd; | |
2139 | ||
2140 | if (bus->input_fd >= 0) | |
2141 | return bus->input_fd; | |
2142 | ||
2143 | return -ENOTCONN; | |
de1c301e LP |
2144 | } |
2145 | ||
d9f644e2 | 2146 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2147 | int flags = 0; |
2148 | ||
d6888822 | 2149 | assert_return(bus, -EINVAL); |
d6888822 | 2150 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2151 | |
8a5cd31e LP |
2152 | switch (bus->state) { |
2153 | ||
2154 | case BUS_UNSET: | |
2155 | case BUS_CLOSED: | |
a3d59cd1 LP |
2156 | return -ENOTCONN; |
2157 | ||
8a5cd31e LP |
2158 | case BUS_WATCH_BIND: |
2159 | flags |= POLLIN; | |
2160 | break; | |
2161 | ||
2162 | case BUS_OPENING: | |
de1c301e | 2163 | flags |= POLLOUT; |
8a5cd31e | 2164 | break; |
89ffcd2a | 2165 | |
8a5cd31e | 2166 | case BUS_AUTHENTICATING: |
2181a7f5 | 2167 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2168 | flags |= POLLOUT; |
2169 | ||
2170 | flags |= POLLIN; | |
8a5cd31e | 2171 | break; |
89ffcd2a | 2172 | |
8a5cd31e LP |
2173 | case BUS_RUNNING: |
2174 | case BUS_HELLO: | |
de1c301e LP |
2175 | if (bus->rqueue_size <= 0) |
2176 | flags |= POLLIN; | |
2177 | if (bus->wqueue_size > 0) | |
2178 | flags |= POLLOUT; | |
8a5cd31e LP |
2179 | break; |
2180 | ||
2181 | case BUS_CLOSING: | |
2182 | break; | |
2183 | ||
2184 | default: | |
2185 | assert_not_reached("Unknown state"); | |
de1c301e LP |
2186 | } |
2187 | ||
2188 | return flags; | |
2189 | } | |
2190 | ||
d9f644e2 | 2191 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2192 | struct reply_callback *c; |
2193 | ||
d6888822 LP |
2194 | assert_return(bus, -EINVAL); |
2195 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2196 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2197 | |
a3d59cd1 LP |
2198 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2199 | return -ENOTCONN; | |
2200 | ||
8f8f05a9 LP |
2201 | if (bus->track_queue) { |
2202 | *timeout_usec = 0; | |
2203 | return 1; | |
2204 | } | |
2205 | ||
8a5cd31e | 2206 | switch (bus->state) { |
718db961 | 2207 | |
8a5cd31e | 2208 | case BUS_AUTHENTICATING: |
e3017af9 LP |
2209 | *timeout_usec = bus->auth_timeout; |
2210 | return 1; | |
e3017af9 | 2211 | |
8a5cd31e LP |
2212 | case BUS_RUNNING: |
2213 | case BUS_HELLO: | |
2214 | if (bus->rqueue_size > 0) { | |
2215 | *timeout_usec = 0; | |
2216 | return 1; | |
2217 | } | |
2218 | ||
2219 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2220 | if (!c) { | |
2221 | *timeout_usec = (uint64_t) -1; | |
2222 | return 0; | |
2223 | } | |
2224 | ||
ac8029fc | 2225 | if (c->timeout_usec == 0) { |
8a5cd31e LP |
2226 | *timeout_usec = (uint64_t) -1; |
2227 | return 0; | |
2228 | } | |
2229 | ||
ac8029fc | 2230 | *timeout_usec = c->timeout_usec; |
8a5cd31e | 2231 | return 1; |
e3017af9 | 2232 | |
8a5cd31e | 2233 | case BUS_CLOSING: |
8efd6381 LP |
2234 | *timeout_usec = 0; |
2235 | return 1; | |
8efd6381 | 2236 | |
8a5cd31e LP |
2237 | case BUS_WATCH_BIND: |
2238 | case BUS_OPENING: | |
adee69fa | 2239 | *timeout_usec = (uint64_t) -1; |
e3017af9 LP |
2240 | return 0; |
2241 | ||
8a5cd31e LP |
2242 | default: |
2243 | assert_not_reached("Unknown or unexpected stat"); | |
19befb2d | 2244 | } |
e3017af9 LP |
2245 | } |
2246 | ||
2247 | static int process_timeout(sd_bus *bus) { | |
4afd3348 LP |
2248 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2249 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; | |
e3017af9 | 2250 | struct reply_callback *c; |
1b64f838 | 2251 | sd_bus_slot *slot; |
b057498a | 2252 | bool is_hello; |
e3017af9 LP |
2253 | usec_t n; |
2254 | int r; | |
2255 | ||
2256 | assert(bus); | |
ac8029fc | 2257 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
e3017af9 LP |
2258 | |
2259 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2260 | if (!c) | |
2261 | return 0; | |
2262 | ||
2263 | n = now(CLOCK_MONOTONIC); | |
ac8029fc | 2264 | if (c->timeout_usec > n) |
e3017af9 LP |
2265 | return 0; |
2266 | ||
eb01ba5d LP |
2267 | r = bus_message_new_synthetic_error( |
2268 | bus, | |
693eb9a2 | 2269 | c->cookie, |
14c24659 | 2270 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2271 | &m); |
2272 | if (r < 0) | |
2273 | return r; | |
2274 | ||
7adc46fc | 2275 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2276 | if (r < 0) |
2277 | return r; | |
2278 | ||
e3017af9 | 2279 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
ac8029fc | 2280 | c->timeout_usec = 0; |
19befb2d | 2281 | |
c9fe4af7 | 2282 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2283 | c->cookie = 0; |
2284 | ||
1b64f838 | 2285 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2286 | |
313cefa1 | 2287 | bus->iteration_counter++; |
718db961 | 2288 | |
b057498a LP |
2289 | is_hello = bus->state == BUS_HELLO && c->callback == hello_callback; |
2290 | ||
1b64f838 LP |
2291 | bus->current_message = m; |
2292 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2293 | bus->current_handler = c->callback; |
2294 | bus->current_userdata = slot->userdata; | |
19070062 | 2295 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2296 | bus->current_userdata = NULL; |
2297 | bus->current_handler = NULL; | |
d974ad05 | 2298 | bus->current_slot = NULL; |
19befb2d | 2299 | bus->current_message = NULL; |
718db961 | 2300 | |
1b64f838 LP |
2301 | if (slot->floating) { |
2302 | bus_slot_disconnect(slot); | |
2303 | sd_bus_slot_unref(slot); | |
2304 | } | |
2305 | ||
d974ad05 DH |
2306 | sd_bus_slot_unref(slot); |
2307 | ||
8a5cd31e LP |
2308 | /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log |
2309 | * and ignore the callback handler's return value. */ | |
b057498a LP |
2310 | if (is_hello) |
2311 | return r; | |
2312 | ||
1b64f838 | 2313 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2314 | } |
2315 | ||
9d373862 LP |
2316 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2317 | assert(bus); | |
2318 | assert(m); | |
2319 | ||
2320 | if (bus->state != BUS_HELLO) | |
2321 | return 0; | |
2322 | ||
2323 | /* Let's make sure the first message on the bus is the HELLO | |
2324 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2325 | * here (we leave that to the usual handling), we just verify |
2326 | * we don't let any earlier msg through. */ | |
9d373862 | 2327 | |
945c2931 | 2328 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
9d373862 LP |
2329 | return -EIO; |
2330 | ||
19befb2d | 2331 | if (m->reply_cookie != 1) |
9d373862 LP |
2332 | return -EIO; |
2333 | ||
2334 | return 0; | |
2335 | } | |
2336 | ||
a652755d | 2337 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
4afd3348 LP |
2338 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; |
2339 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
19befb2d | 2340 | struct reply_callback *c; |
1b64f838 | 2341 | sd_bus_slot *slot; |
b057498a | 2342 | bool is_hello; |
a652755d LP |
2343 | int r; |
2344 | ||
2345 | assert(bus); | |
2346 | assert(m); | |
2347 | ||
945c2931 | 2348 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
a652755d LP |
2349 | return 0; |
2350 | ||
09365592 LP |
2351 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) |
2352 | return 0; | |
2353 | ||
c9fe4af7 | 2354 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2355 | if (!c) |
2356 | return 0; | |
2357 | ||
19befb2d | 2358 | c->cookie = 0; |
19befb2d | 2359 | |
1b64f838 | 2360 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2361 | |
c7db1984 | 2362 | if (m->n_fds > 0 && !bus->accept_fd) { |
2ce97e2b LP |
2363 | |
2364 | /* If the reply contained a file descriptor which we | |
2365 | * didn't want we pass an error instead. */ | |
2366 | ||
2367 | r = bus_message_new_synthetic_error( | |
2368 | bus, | |
2369 | m->reply_cookie, | |
2370 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2371 | &synthetic_reply); | |
2372 | if (r < 0) | |
1b64f838 | 2373 | return r; |
2ce97e2b | 2374 | |
52cd5877 LP |
2375 | /* Copy over original timestamp */ |
2376 | synthetic_reply->realtime = m->realtime; | |
2377 | synthetic_reply->monotonic = m->monotonic; | |
2378 | synthetic_reply->seqnum = m->seqnum; | |
2379 | ||
2ce97e2b LP |
2380 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2381 | if (r < 0) | |
1b64f838 | 2382 | return r; |
2ce97e2b LP |
2383 | |
2384 | m = synthetic_reply; | |
2385 | } else { | |
2386 | r = sd_bus_message_rewind(m, true); | |
2387 | if (r < 0) | |
1b64f838 | 2388 | return r; |
2ce97e2b | 2389 | } |
88fe224c | 2390 | |
ac8029fc | 2391 | if (c->timeout_usec != 0) { |
1b64f838 | 2392 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
ac8029fc | 2393 | c->timeout_usec = 0; |
1b64f838 | 2394 | } |
19befb2d | 2395 | |
b057498a LP |
2396 | is_hello = bus->state == BUS_HELLO && c->callback == hello_callback; |
2397 | ||
1b64f838 | 2398 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2399 | bus->current_handler = c->callback; |
2400 | bus->current_userdata = slot->userdata; | |
19070062 | 2401 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2402 | bus->current_userdata = NULL; |
2403 | bus->current_handler = NULL; | |
d974ad05 | 2404 | bus->current_slot = NULL; |
a652755d | 2405 | |
19befb2d LP |
2406 | if (slot->floating) { |
2407 | bus_slot_disconnect(slot); | |
2408 | sd_bus_slot_unref(slot); | |
2409 | } | |
2410 | ||
d974ad05 DH |
2411 | sd_bus_slot_unref(slot); |
2412 | ||
8a5cd31e LP |
2413 | /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and |
2414 | * ignore the callback handler's return value. */ | |
b057498a LP |
2415 | if (is_hello) |
2416 | return r; | |
2417 | ||
1b64f838 | 2418 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2419 | } |
2420 | ||
2421 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
4afd3348 | 2422 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2423 | struct filter_callback *l; |
2424 | int r; | |
2425 | ||
392d5b37 LP |
2426 | assert(bus); |
2427 | assert(m); | |
2428 | ||
7286037f LP |
2429 | do { |
2430 | bus->filter_callbacks_modified = false; | |
2431 | ||
2432 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2433 | sd_bus_slot *slot; |
7286037f LP |
2434 | |
2435 | if (bus->filter_callbacks_modified) | |
2436 | break; | |
2437 | ||
2438 | /* Don't run this more than once per iteration */ | |
2439 | if (l->last_iteration == bus->iteration_counter) | |
2440 | continue; | |
2441 | ||
2442 | l->last_iteration = bus->iteration_counter; | |
2443 | ||
88fe224c LP |
2444 | r = sd_bus_message_rewind(m, true); |
2445 | if (r < 0) | |
2446 | return r; | |
2447 | ||
1b64f838 LP |
2448 | slot = container_of(l, sd_bus_slot, filter_callback); |
2449 | ||
2450 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2451 | bus->current_handler = l->callback; |
2452 | bus->current_userdata = slot->userdata; | |
19070062 | 2453 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2454 | bus->current_userdata = NULL; |
2455 | bus->current_handler = NULL; | |
1b64f838 | 2456 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2457 | |
ebcf1f97 | 2458 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2459 | if (r != 0) |
2460 | return r; | |
2461 | ||
2462 | } | |
2463 | ||
2464 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2465 | |
2466 | return 0; | |
2467 | } | |
2468 | ||
392d5b37 | 2469 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2470 | int r; |
2471 | ||
392d5b37 LP |
2472 | assert(bus); |
2473 | assert(m); | |
2474 | ||
7286037f LP |
2475 | do { |
2476 | bus->match_callbacks_modified = false; | |
2477 | ||
eb01ba5d | 2478 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2479 | if (r != 0) |
2480 | return r; | |
2481 | ||
2482 | } while (bus->match_callbacks_modified); | |
2483 | ||
2484 | return 0; | |
392d5b37 LP |
2485 | } |
2486 | ||
b9bf7e2b | 2487 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
4afd3348 | 2488 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
b9bf7e2b LP |
2489 | int r; |
2490 | ||
2491 | assert(bus); | |
2492 | assert(m); | |
2493 | ||
c7db1984 | 2494 | if (bus->is_monitor) |
09365592 LP |
2495 | return 0; |
2496 | ||
758bf0c7 LP |
2497 | if (bus->manual_peer_interface) |
2498 | return 0; | |
2499 | ||
40ca29a1 | 2500 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2501 | return 0; |
2502 | ||
2503 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2504 | return 0; | |
2505 | ||
0461f8cd | 2506 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2507 | return 1; |
2508 | ||
2509 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2510 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2511 | else if (streq_ptr(m->member, "GetMachineId")) { |
2512 | sd_id128_t id; | |
2513 | char sid[33]; | |
2514 | ||
2515 | r = sd_id128_get_machine(&id); | |
2516 | if (r < 0) | |
2517 | return r; | |
2518 | ||
df2d202e | 2519 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2520 | if (r < 0) |
2521 | return r; | |
2522 | ||
2523 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2524 | } else { | |
29ddb38f | 2525 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2526 | m, &reply, |
40ca29a1 | 2527 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2528 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2529 | } |
2530 | ||
2531 | if (r < 0) | |
2532 | return r; | |
2533 | ||
2534 | r = sd_bus_send(bus, reply, NULL); | |
2535 | if (r < 0) | |
2536 | return r; | |
2537 | ||
2538 | return 1; | |
2539 | } | |
2540 | ||
2ce97e2b LP |
2541 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2542 | assert(bus); | |
2543 | assert(m); | |
2544 | ||
2545 | /* If we got a message with a file descriptor which we didn't | |
2546 | * want to accept, then let's drop it. How can this even | |
2547 | * happen? For example, when the kernel queues a message into | |
2548 | * an activatable names's queue which allows fds, and then is | |
2549 | * delivered to us later even though we ourselves did not | |
2550 | * negotiate it. */ | |
2551 | ||
c7db1984 | 2552 | if (bus->is_monitor) |
09365592 LP |
2553 | return 0; |
2554 | ||
2ce97e2b LP |
2555 | if (m->n_fds <= 0) |
2556 | return 0; | |
2557 | ||
c7db1984 | 2558 | if (bus->accept_fd) |
2ce97e2b LP |
2559 | return 0; |
2560 | ||
2561 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2562 | return 1; /* just eat it up */ | |
2563 | ||
2564 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2565 | } | |
2566 | ||
992c052c | 2567 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2568 | int r; |
2569 | ||
2570 | assert(bus); | |
992c052c | 2571 | assert(m); |
e3017af9 | 2572 | |
19befb2d | 2573 | bus->current_message = m; |
992c052c | 2574 | bus->iteration_counter++; |
e3017af9 | 2575 | |
f9f97ca6 | 2576 | log_debug_bus_message(m); |
40ca29a1 | 2577 | |
992c052c LP |
2578 | r = process_hello(bus, m); |
2579 | if (r != 0) | |
affff0b6 | 2580 | goto finish; |
a652755d | 2581 | |
992c052c LP |
2582 | r = process_reply(bus, m); |
2583 | if (r != 0) | |
affff0b6 | 2584 | goto finish; |
e3017af9 | 2585 | |
2ce97e2b LP |
2586 | r = process_fd_check(bus, m); |
2587 | if (r != 0) | |
2588 | goto finish; | |
2589 | ||
992c052c LP |
2590 | r = process_filter(bus, m); |
2591 | if (r != 0) | |
affff0b6 | 2592 | goto finish; |
a652755d | 2593 | |
992c052c LP |
2594 | r = process_match(bus, m); |
2595 | if (r != 0) | |
affff0b6 | 2596 | goto finish; |
a652755d | 2597 | |
992c052c LP |
2598 | r = process_builtin(bus, m); |
2599 | if (r != 0) | |
affff0b6 LP |
2600 | goto finish; |
2601 | ||
2602 | r = bus_process_object(bus, m); | |
a652755d | 2603 | |
affff0b6 | 2604 | finish: |
19befb2d | 2605 | bus->current_message = NULL; |
affff0b6 | 2606 | return r; |
29ddb38f | 2607 | } |
88fe224c | 2608 | |
8f8f05a9 LP |
2609 | static int dispatch_track(sd_bus *bus) { |
2610 | assert(bus); | |
2611 | ||
2612 | if (!bus->track_queue) | |
2613 | return 0; | |
2614 | ||
2615 | bus_track_dispatch(bus->track_queue); | |
2616 | return 1; | |
2617 | } | |
2618 | ||
766c5809 | 2619 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
4afd3348 | 2620 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
29ddb38f | 2621 | int r; |
a652755d | 2622 | |
29ddb38f | 2623 | assert(bus); |
945c2931 | 2624 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
7286037f | 2625 | |
992c052c LP |
2626 | r = process_timeout(bus); |
2627 | if (r != 0) | |
2628 | goto null_message; | |
7286037f | 2629 | |
992c052c LP |
2630 | r = dispatch_wqueue(bus); |
2631 | if (r != 0) | |
2632 | goto null_message; | |
7286037f | 2633 | |
8f8f05a9 LP |
2634 | r = dispatch_track(bus); |
2635 | if (r != 0) | |
2636 | goto null_message; | |
2637 | ||
766c5809 | 2638 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2639 | if (r < 0) |
2640 | return r; | |
2641 | if (!m) | |
2642 | goto null_message; | |
7286037f | 2643 | |
992c052c LP |
2644 | r = process_message(bus, m); |
2645 | if (r != 0) | |
2646 | goto null_message; | |
7286037f | 2647 | |
992c052c LP |
2648 | if (ret) { |
2649 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2650 | if (r < 0) |
2651 | return r; | |
e3017af9 | 2652 | |
992c052c LP |
2653 | *ret = m; |
2654 | m = NULL; | |
2655 | return 1; | |
2656 | } | |
a652755d | 2657 | |
40ca29a1 | 2658 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2659 | |
dc74ce9b LP |
2660 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2661 | strna(sd_bus_message_get_sender(m)), | |
2662 | strna(sd_bus_message_get_path(m)), | |
2663 | strna(sd_bus_message_get_interface(m)), | |
2664 | strna(sd_bus_message_get_member(m))); | |
2665 | ||
992c052c | 2666 | r = sd_bus_reply_method_errorf( |
df2d202e | 2667 | m, |
40ca29a1 | 2668 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2669 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2670 | if (r < 0) |
2671 | return r; | |
2672 | } | |
e3017af9 | 2673 | |
992c052c | 2674 | return 1; |
0a72c2bd | 2675 | |
992c052c LP |
2676 | null_message: |
2677 | if (r >= 0 && ret) | |
2678 | *ret = NULL; | |
0a72c2bd | 2679 | |
992c052c | 2680 | return r; |
29ddb38f | 2681 | } |
0a72c2bd | 2682 | |
fbb4603d LP |
2683 | static int bus_exit_now(sd_bus *bus) { |
2684 | assert(bus); | |
2685 | ||
2686 | /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes | |
2687 | * sd_event_exit(), otherwise invokes libc exit(). */ | |
2688 | ||
2689 | if (bus->exited) /* did we already exit? */ | |
2690 | return 0; | |
2691 | if (!bus->exit_triggered) /* was the exit condition triggered? */ | |
2692 | return 0; | |
2693 | if (!bus->exit_on_disconnect) /* Shall we actually exit on disconnection? */ | |
2694 | return 0; | |
2695 | ||
2696 | bus->exited = true; /* never exit more than once */ | |
2697 | ||
2698 | log_debug("Bus connection disconnected, exiting."); | |
2699 | ||
2700 | if (bus->event) | |
2701 | return sd_event_exit(bus->event, EXIT_FAILURE); | |
2702 | else | |
2703 | exit(EXIT_FAILURE); | |
2704 | ||
2705 | assert_not_reached("exit() didn't exit?"); | |
2706 | } | |
2707 | ||
217fcc7e LP |
2708 | static int process_closing_reply_callback(sd_bus *bus, struct reply_callback *c) { |
2709 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
4afd3348 | 2710 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
217fcc7e | 2711 | sd_bus_slot *slot; |
718db961 LP |
2712 | int r; |
2713 | ||
2714 | assert(bus); | |
217fcc7e | 2715 | assert(c); |
718db961 | 2716 | |
217fcc7e LP |
2717 | r = bus_message_new_synthetic_error( |
2718 | bus, | |
2719 | c->cookie, | |
2720 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), | |
2721 | &m); | |
2722 | if (r < 0) | |
2723 | return r; | |
ebcf1f97 | 2724 | |
217fcc7e LP |
2725 | r = bus_seal_synthetic_message(bus, m); |
2726 | if (r < 0) | |
2727 | return r; | |
718db961 | 2728 | |
ac8029fc | 2729 | if (c->timeout_usec != 0) { |
217fcc7e | 2730 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
ac8029fc | 2731 | c->timeout_usec = 0; |
217fcc7e | 2732 | } |
718db961 | 2733 | |
217fcc7e LP |
2734 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
2735 | c->cookie = 0; | |
2736 | ||
2737 | slot = container_of(c, sd_bus_slot, reply_callback); | |
718db961 | 2738 | |
217fcc7e | 2739 | bus->iteration_counter++; |
19befb2d | 2740 | |
217fcc7e LP |
2741 | bus->current_message = m; |
2742 | bus->current_slot = sd_bus_slot_ref(slot); | |
2743 | bus->current_handler = c->callback; | |
2744 | bus->current_userdata = slot->userdata; | |
2745 | r = c->callback(m, slot->userdata, &error_buffer); | |
2746 | bus->current_userdata = NULL; | |
2747 | bus->current_handler = NULL; | |
2748 | bus->current_slot = NULL; | |
2749 | bus->current_message = NULL; | |
718db961 | 2750 | |
217fcc7e LP |
2751 | if (slot->floating) { |
2752 | bus_slot_disconnect(slot); | |
2753 | sd_bus_slot_unref(slot); | |
2754 | } | |
718db961 | 2755 | |
217fcc7e | 2756 | sd_bus_slot_unref(slot); |
1b64f838 | 2757 | |
217fcc7e LP |
2758 | return bus_maybe_reply_error(m, r, &error_buffer); |
2759 | } | |
718db961 | 2760 | |
217fcc7e LP |
2761 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2762 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
2763 | struct reply_callback *c; | |
2764 | int r; | |
d974ad05 | 2765 | |
217fcc7e LP |
2766 | assert(bus); |
2767 | assert(bus->state == BUS_CLOSING); | |
2768 | ||
2769 | /* First, fail all outstanding method calls */ | |
2770 | c = ordered_hashmap_first(bus->reply_callbacks); | |
2771 | if (c) | |
2772 | return process_closing_reply_callback(bus, c); | |
718db961 | 2773 | |
232f3677 LP |
2774 | /* Then, fake-drop all remaining bus tracking references */ |
2775 | if (bus->tracks) { | |
2776 | bus_track_close(bus->tracks); | |
2777 | return 1; | |
2778 | } | |
2779 | ||
718db961 LP |
2780 | /* Then, synthesize a Disconnected message */ |
2781 | r = sd_bus_message_new_signal( | |
2782 | bus, | |
151b9b96 | 2783 | &m, |
718db961 LP |
2784 | "/org/freedesktop/DBus/Local", |
2785 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2786 | "Disconnected"); |
718db961 LP |
2787 | if (r < 0) |
2788 | return r; | |
2789 | ||
fb6d9b77 | 2790 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2791 | |
7adc46fc | 2792 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2793 | if (r < 0) |
2794 | return r; | |
2795 | ||
2796 | sd_bus_close(bus); | |
2797 | ||
19befb2d | 2798 | bus->current_message = m; |
718db961 LP |
2799 | bus->iteration_counter++; |
2800 | ||
2801 | r = process_filter(bus, m); | |
2802 | if (r != 0) | |
2803 | goto finish; | |
2804 | ||
2805 | r = process_match(bus, m); | |
2806 | if (r != 0) | |
2807 | goto finish; | |
2808 | ||
fbb4603d LP |
2809 | /* Nothing else to do, exit now, if the condition holds */ |
2810 | bus->exit_triggered = true; | |
2811 | (void) bus_exit_now(bus); | |
2812 | ||
718db961 LP |
2813 | if (ret) { |
2814 | *ret = m; | |
2815 | m = NULL; | |
2816 | } | |
2817 | ||
2818 | r = 1; | |
2819 | ||
2820 | finish: | |
19befb2d LP |
2821 | bus->current_message = NULL; |
2822 | ||
718db961 LP |
2823 | return r; |
2824 | } | |
2825 | ||
766c5809 | 2826 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2827 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2828 | int r; |
0a72c2bd | 2829 | |
992c052c LP |
2830 | /* Returns 0 when we didn't do anything. This should cause the |
2831 | * caller to invoke sd_bus_wait() before returning the next | |
2832 | * time. Returns > 0 when we did something, which possibly | |
2833 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2834 | |
d6888822 LP |
2835 | assert_return(bus, -EINVAL); |
2836 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2837 | |
992c052c | 2838 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2839 | assert_return(!bus->current_message, -EBUSY); |
2840 | assert(!bus->current_slot); | |
0a72c2bd | 2841 | |
992c052c | 2842 | switch (bus->state) { |
0a72c2bd | 2843 | |
992c052c | 2844 | case BUS_UNSET: |
992c052c | 2845 | return -ENOTCONN; |
0a72c2bd | 2846 | |
6d6f4904 LP |
2847 | case BUS_CLOSED: |
2848 | return -ECONNRESET; | |
2849 | ||
8a5cd31e LP |
2850 | case BUS_WATCH_BIND: |
2851 | r = bus_socket_process_watch_bind(bus); | |
2852 | break; | |
2853 | ||
992c052c LP |
2854 | case BUS_OPENING: |
2855 | r = bus_socket_process_opening(bus); | |
8a5cd31e | 2856 | break; |
a652755d | 2857 | |
992c052c | 2858 | case BUS_AUTHENTICATING: |
992c052c | 2859 | r = bus_socket_process_authenticating(bus); |
8a5cd31e | 2860 | break; |
a652755d | 2861 | |
992c052c LP |
2862 | case BUS_RUNNING: |
2863 | case BUS_HELLO: | |
766c5809 | 2864 | r = process_running(bus, hint_priority, priority, ret); |
8a5cd31e LP |
2865 | if (r >= 0) |
2866 | return r; | |
718db961 | 2867 | |
8a5cd31e LP |
2868 | /* This branch initializes *ret, hence we don't use the generic error checking below */ |
2869 | break; | |
718db961 LP |
2870 | |
2871 | case BUS_CLOSING: | |
2872 | return process_closing(bus, ret); | |
8a5cd31e LP |
2873 | |
2874 | default: | |
2875 | assert_not_reached("Unknown state"); | |
992c052c | 2876 | } |
43a43f50 | 2877 | |
8a5cd31e LP |
2878 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
2879 | bus_enter_closing(bus); | |
2880 | r = 1; | |
2881 | } else if (r < 0) | |
2882 | return r; | |
2883 | ||
2884 | if (ret) | |
2885 | *ret = NULL; | |
2886 | ||
2887 | return r; | |
e3017af9 LP |
2888 | } |
2889 | ||
766c5809 LP |
2890 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2891 | return bus_process_internal(bus, false, 0, ret); | |
2892 | } | |
2893 | ||
2894 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2895 | return bus_process_internal(bus, true, priority, ret); | |
2896 | } | |
2897 | ||
992c052c LP |
2898 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2899 | struct pollfd p[2] = {}; | |
8a5cd31e | 2900 | int r, n; |
992c052c | 2901 | struct timespec ts; |
3a43da28 | 2902 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2903 | |
2904 | assert(bus); | |
718db961 LP |
2905 | |
2906 | if (bus->state == BUS_CLOSING) | |
2907 | return 1; | |
2908 | ||
a3d59cd1 LP |
2909 | if (!BUS_IS_OPEN(bus->state)) |
2910 | return -ENOTCONN; | |
adcdb374 | 2911 | |
8a5cd31e LP |
2912 | if (bus->state == BUS_WATCH_BIND) { |
2913 | assert(bus->inotify_fd >= 0); | |
adcdb374 | 2914 | |
8a5cd31e LP |
2915 | p[0].events = POLLIN; |
2916 | p[0].fd = bus->inotify_fd; | |
992c052c LP |
2917 | n = 1; |
2918 | } else { | |
8a5cd31e LP |
2919 | int e; |
2920 | ||
2921 | e = sd_bus_get_events(bus); | |
2922 | if (e < 0) | |
2923 | return e; | |
2924 | ||
2925 | if (need_more) | |
2926 | /* The caller really needs some more data, he doesn't | |
2927 | * care about what's already read, or any timeouts | |
2928 | * except its own. */ | |
2929 | e |= POLLIN; | |
2930 | else { | |
2931 | usec_t until; | |
2932 | /* The caller wants to process if there's something to | |
2933 | * process, but doesn't care otherwise */ | |
2934 | ||
2935 | r = sd_bus_get_timeout(bus, &until); | |
2936 | if (r < 0) | |
2937 | return r; | |
2938 | if (r > 0) | |
2939 | m = usec_sub_unsigned(until, now(CLOCK_MONOTONIC)); | |
2940 | } | |
2941 | ||
2942 | p[0].fd = bus->input_fd; | |
2943 | if (bus->output_fd == bus->input_fd) { | |
2944 | p[0].events = e; | |
2945 | n = 1; | |
2946 | } else { | |
2947 | p[0].events = e & POLLIN; | |
2948 | p[1].fd = bus->output_fd; | |
2949 | p[1].events = e & POLLOUT; | |
2950 | n = 2; | |
2951 | } | |
adcdb374 LP |
2952 | } |
2953 | ||
8a5cd31e LP |
2954 | if (timeout_usec != (uint64_t) -1 && (m == USEC_INFINITY || timeout_usec < m)) |
2955 | m = timeout_usec; | |
2956 | ||
2957 | r = ppoll(p, n, m == USEC_INFINITY ? NULL : timespec_store(&ts, m), NULL); | |
adcdb374 | 2958 | if (r < 0) |
992c052c | 2959 | return -errno; |
adcdb374 | 2960 | |
992c052c | 2961 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2962 | } |
2963 | ||
d9f644e2 | 2964 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2965 | |
d6888822 | 2966 | assert_return(bus, -EINVAL); |
d6888822 | 2967 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2968 | |
718db961 LP |
2969 | if (bus->state == BUS_CLOSING) |
2970 | return 0; | |
2971 | ||
a3d59cd1 LP |
2972 | if (!BUS_IS_OPEN(bus->state)) |
2973 | return -ENOTCONN; | |
718db961 | 2974 | |
992c052c LP |
2975 | if (bus->rqueue_size > 0) |
2976 | return 0; | |
9db76355 | 2977 | |
992c052c LP |
2978 | return bus_poll(bus, false, timeout_usec); |
2979 | } | |
9db76355 | 2980 | |
d9f644e2 | 2981 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2982 | int r; |
9db76355 | 2983 | |
d6888822 | 2984 | assert_return(bus, -EINVAL); |
d6888822 | 2985 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2986 | |
718db961 LP |
2987 | if (bus->state == BUS_CLOSING) |
2988 | return 0; | |
2989 | ||
a3d59cd1 LP |
2990 | if (!BUS_IS_OPEN(bus->state)) |
2991 | return -ENOTCONN; | |
718db961 | 2992 | |
8a5cd31e LP |
2993 | /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */ |
2994 | if (bus->state == BUS_WATCH_BIND) | |
2995 | return -EUNATCH; | |
2996 | ||
992c052c LP |
2997 | r = bus_ensure_running(bus); |
2998 | if (r < 0) | |
2999 | return r; | |
9db76355 | 3000 | |
992c052c LP |
3001 | if (bus->wqueue_size <= 0) |
3002 | return 0; | |
9db76355 | 3003 | |
992c052c LP |
3004 | for (;;) { |
3005 | r = dispatch_wqueue(bus); | |
32f46480 | 3006 | if (r < 0) { |
103a5027 | 3007 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 3008 | bus_enter_closing(bus); |
441d56a1 LP |
3009 | return -ECONNRESET; |
3010 | } | |
32f46480 | 3011 | |
9db76355 | 3012 | return r; |
32f46480 | 3013 | } |
9db76355 | 3014 | |
992c052c LP |
3015 | if (bus->wqueue_size <= 0) |
3016 | return 0; | |
9db76355 | 3017 | |
992c052c | 3018 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
3019 | if (r < 0) |
3020 | return r; | |
9db76355 | 3021 | } |
9db76355 LP |
3022 | } |
3023 | ||
19befb2d LP |
3024 | _public_ int sd_bus_add_filter( |
3025 | sd_bus *bus, | |
3026 | sd_bus_slot **slot, | |
3027 | sd_bus_message_handler_t callback, | |
3028 | void *userdata) { | |
d9f644e2 | 3029 | |
19befb2d | 3030 | sd_bus_slot *s; |
de1c301e | 3031 | |
d6888822 LP |
3032 | assert_return(bus, -EINVAL); |
3033 | assert_return(callback, -EINVAL); | |
3034 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 3035 | |
19befb2d LP |
3036 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
3037 | if (!s) | |
29ddb38f LP |
3038 | return -ENOMEM; |
3039 | ||
19befb2d | 3040 | s->filter_callback.callback = callback; |
a652755d | 3041 | |
19befb2d LP |
3042 | bus->filter_callbacks_modified = true; |
3043 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 3044 | |
19befb2d LP |
3045 | if (slot) |
3046 | *slot = s; | |
29ddb38f | 3047 | |
992c052c | 3048 | return 0; |
a652755d | 3049 | } |
392d5b37 | 3050 | |
7593c7a4 LP |
3051 | static int add_match_callback( |
3052 | sd_bus_message *m, | |
3053 | void *userdata, | |
3054 | sd_bus_error *ret_error) { | |
3055 | ||
3056 | sd_bus_slot *match_slot = userdata; | |
3057 | bool failed = false; | |
3058 | int r; | |
3059 | ||
3060 | assert(m); | |
3061 | assert(match_slot); | |
3062 | ||
3063 | sd_bus_slot_ref(match_slot); | |
3064 | ||
3065 | if (sd_bus_message_is_method_error(m, NULL)) { | |
3066 | log_debug_errno(sd_bus_message_get_errno(m), | |
3067 | "Unable to add match %s, failing connection: %s", | |
3068 | match_slot->match_callback.match_string, | |
3069 | sd_bus_message_get_error(m)->message); | |
3070 | ||
3071 | failed = true; | |
3072 | } else | |
3073 | log_debug("Match %s successfully installed.", match_slot->match_callback.match_string); | |
3074 | ||
3075 | if (match_slot->match_callback.install_callback) { | |
3076 | sd_bus *bus; | |
3077 | ||
3078 | bus = sd_bus_message_get_bus(m); | |
3079 | ||
3080 | /* This function has been called as slot handler, and we want to call another slot handler. Let's | |
3081 | * update the slot callback metadata temporarily with our own data, and then revert back to the old | |
3082 | * values. */ | |
3083 | ||
3084 | assert(bus->current_slot == match_slot->match_callback.install_slot); | |
3085 | assert(bus->current_handler == add_match_callback); | |
3086 | assert(bus->current_userdata == userdata); | |
3087 | ||
3088 | bus->current_slot = match_slot; | |
3089 | bus->current_handler = match_slot->match_callback.install_callback; | |
3090 | bus->current_userdata = match_slot->userdata; | |
3091 | ||
3092 | r = match_slot->match_callback.install_callback(m, match_slot->userdata, ret_error); | |
3093 | ||
3094 | bus->current_slot = match_slot->match_callback.install_slot; | |
3095 | bus->current_handler = add_match_callback; | |
3096 | bus->current_userdata = userdata; | |
3097 | ||
3098 | match_slot->match_callback.install_slot = sd_bus_slot_unref(match_slot->match_callback.install_slot); | |
3099 | } else { | |
3100 | if (failed) /* Generic failure handling: destroy the connection */ | |
3101 | bus_enter_closing(sd_bus_message_get_bus(m)); | |
3102 | ||
3103 | r = 1; | |
3104 | } | |
3105 | ||
3106 | if (failed && match_slot->floating) { | |
3107 | bus_slot_disconnect(match_slot); | |
3108 | sd_bus_slot_unref(match_slot); | |
3109 | } | |
3110 | ||
3111 | sd_bus_slot_unref(match_slot); | |
3112 | ||
3113 | return r; | |
3114 | } | |
3115 | ||
3116 | static int bus_add_match_full( | |
19befb2d LP |
3117 | sd_bus *bus, |
3118 | sd_bus_slot **slot, | |
7593c7a4 | 3119 | bool asynchronous, |
19befb2d LP |
3120 | const char *match, |
3121 | sd_bus_message_handler_t callback, | |
7593c7a4 | 3122 | sd_bus_message_handler_t install_callback, |
19befb2d | 3123 | void *userdata) { |
d9f644e2 | 3124 | |
992c052c LP |
3125 | struct bus_match_component *components = NULL; |
3126 | unsigned n_components = 0; | |
2915234d | 3127 | sd_bus_slot *s = NULL; |
992c052c | 3128 | int r = 0; |
392d5b37 | 3129 | |
d6888822 LP |
3130 | assert_return(bus, -EINVAL); |
3131 | assert_return(match, -EINVAL); | |
3132 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 3133 | |
992c052c LP |
3134 | r = bus_match_parse(match, &components, &n_components); |
3135 | if (r < 0) | |
3136 | goto finish; | |
29ddb38f | 3137 | |
19befb2d LP |
3138 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
3139 | if (!s) { | |
3140 | r = -ENOMEM; | |
3141 | goto finish; | |
3142 | } | |
3143 | ||
3144 | s->match_callback.callback = callback; | |
7593c7a4 | 3145 | s->match_callback.install_callback = install_callback; |
19befb2d | 3146 | |
992c052c | 3147 | if (bus->bus_client) { |
cc65fe5e | 3148 | enum bus_match_scope scope; |
29ddb38f | 3149 | |
cc65fe5e | 3150 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 3151 | |
7593c7a4 | 3152 | /* Do not install server-side matches for matches against the local service, interface or bus path. */ |
9ee7a50c | 3153 | if (scope != BUS_MATCH_LOCAL) { |
cc65fe5e | 3154 | |
7593c7a4 | 3155 | /* We store the original match string, so that we can use it to remove the match again. */ |
cc65fe5e | 3156 | |
a132bef0 ZJS |
3157 | s->match_callback.match_string = strdup(match); |
3158 | if (!s->match_callback.match_string) { | |
3159 | r = -ENOMEM; | |
3160 | goto finish; | |
19befb2d | 3161 | } |
19befb2d | 3162 | |
7593c7a4 LP |
3163 | if (asynchronous) |
3164 | r = bus_add_match_internal_async(bus, | |
3165 | &s->match_callback.install_slot, | |
3166 | s->match_callback.match_string, | |
3167 | add_match_callback, | |
3168 | s); | |
3169 | else | |
3170 | r = bus_add_match_internal(bus, s->match_callback.match_string); | |
cc65fe5e LP |
3171 | if (r < 0) |
3172 | goto finish; | |
3173 | ||
3174 | s->match_added = true; | |
3175 | } | |
392d5b37 LP |
3176 | } |
3177 | ||
992c052c | 3178 | bus->match_callbacks_modified = true; |
19befb2d LP |
3179 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3180 | if (r < 0) | |
3181 | goto finish; | |
3182 | ||
3183 | if (slot) | |
3184 | *slot = s; | |
3185 | s = NULL; | |
917b5dc7 | 3186 | |
992c052c LP |
3187 | finish: |
3188 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3189 | sd_bus_slot_unref(s); |
3190 | ||
992c052c | 3191 | return r; |
917b5dc7 LP |
3192 | } |
3193 | ||
7593c7a4 LP |
3194 | _public_ int sd_bus_add_match( |
3195 | sd_bus *bus, | |
3196 | sd_bus_slot **slot, | |
3197 | const char *match, | |
3198 | sd_bus_message_handler_t callback, | |
3199 | void *userdata) { | |
3200 | ||
3201 | return bus_add_match_full(bus, slot, false, match, callback, NULL, userdata); | |
3202 | } | |
3203 | ||
3204 | _public_ int sd_bus_add_match_async( | |
3205 | sd_bus *bus, | |
3206 | sd_bus_slot **slot, | |
3207 | const char *match, | |
3208 | sd_bus_message_handler_t callback, | |
3209 | sd_bus_message_handler_t install_callback, | |
3210 | void *userdata) { | |
3211 | ||
3212 | return bus_add_match_full(bus, slot, true, match, callback, install_callback, userdata); | |
3213 | } | |
3214 | ||
992c052c LP |
3215 | bool bus_pid_changed(sd_bus *bus) { |
3216 | assert(bus); | |
f10dda3b | 3217 | |
992c052c LP |
3218 | /* We don't support people creating a bus connection and |
3219 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3220 | |
df0ff127 | 3221 | return bus->original_pid != getpid_cached(); |
d5a2b9a6 | 3222 | } |
40ca29a1 LP |
3223 | |
3224 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3225 | sd_bus *bus = userdata; |
40ca29a1 LP |
3226 | int r; |
3227 | ||
3228 | assert(bus); | |
3229 | ||
8a5cd31e LP |
3230 | /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */ |
3231 | ||
40ca29a1 | 3232 | r = sd_bus_process(bus, NULL); |
5ae37ad8 LP |
3233 | if (r < 0) { |
3234 | log_debug_errno(r, "Processing of bus failed, closing down: %m"); | |
3235 | bus_enter_closing(bus); | |
3236 | } | |
40ca29a1 LP |
3237 | |
3238 | return 1; | |
3239 | } | |
3240 | ||
3241 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3242 | sd_bus *bus = userdata; |
40ca29a1 LP |
3243 | int r; |
3244 | ||
3245 | assert(bus); | |
3246 | ||
3247 | r = sd_bus_process(bus, NULL); | |
5ae37ad8 LP |
3248 | if (r < 0) { |
3249 | log_debug_errno(r, "Processing of bus failed, closing down: %m"); | |
3250 | bus_enter_closing(bus); | |
3251 | } | |
40ca29a1 LP |
3252 | |
3253 | return 1; | |
3254 | } | |
3255 | ||
3256 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3257 | sd_bus *bus = userdata; | |
3258 | int r, e; | |
3259 | usec_t until; | |
3260 | ||
3261 | assert(s); | |
3262 | assert(bus); | |
3263 | ||
3264 | e = sd_bus_get_events(bus); | |
5ae37ad8 LP |
3265 | if (e < 0) { |
3266 | r = e; | |
3267 | goto fail; | |
3268 | } | |
40ca29a1 LP |
3269 | |
3270 | if (bus->output_fd != bus->input_fd) { | |
3271 | ||
3272 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3273 | if (r < 0) | |
5ae37ad8 | 3274 | goto fail; |
40ca29a1 LP |
3275 | |
3276 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
5ae37ad8 | 3277 | } else |
40ca29a1 | 3278 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); |
5ae37ad8 LP |
3279 | if (r < 0) |
3280 | goto fail; | |
40ca29a1 LP |
3281 | |
3282 | r = sd_bus_get_timeout(bus, &until); | |
3283 | if (r < 0) | |
5ae37ad8 | 3284 | goto fail; |
40ca29a1 LP |
3285 | if (r > 0) { |
3286 | int j; | |
3287 | ||
3288 | j = sd_event_source_set_time(bus->time_event_source, until); | |
5ae37ad8 LP |
3289 | if (j < 0) { |
3290 | r = j; | |
3291 | goto fail; | |
3292 | } | |
40ca29a1 LP |
3293 | } |
3294 | ||
3295 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3296 | if (r < 0) | |
5ae37ad8 LP |
3297 | goto fail; |
3298 | ||
3299 | return 1; | |
3300 | ||
3301 | fail: | |
3302 | log_debug_errno(r, "Preparing of bus events failed, closing down: %m"); | |
3303 | bus_enter_closing(bus); | |
40ca29a1 LP |
3304 | |
3305 | return 1; | |
3306 | } | |
3307 | ||
abc5fe72 LP |
3308 | static int quit_callback(sd_event_source *event, void *userdata) { |
3309 | sd_bus *bus = userdata; | |
3310 | ||
3311 | assert(event); | |
3312 | ||
3313 | sd_bus_flush(bus); | |
7bb4d371 | 3314 | sd_bus_close(bus); |
abc5fe72 LP |
3315 | |
3316 | return 1; | |
3317 | } | |
3318 | ||
8a5cd31e | 3319 | int bus_attach_io_events(sd_bus *bus) { |
1e05d493 LP |
3320 | int r; |
3321 | ||
3322 | assert(bus); | |
3323 | ||
3324 | if (bus->input_fd < 0) | |
3325 | return 0; | |
3326 | ||
3327 | if (!bus->event) | |
3328 | return 0; | |
3329 | ||
3330 | if (!bus->input_io_event_source) { | |
151b9b96 | 3331 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3332 | if (r < 0) |
3333 | return r; | |
3334 | ||
3335 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3336 | if (r < 0) | |
3337 | return r; | |
3338 | ||
3339 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3340 | if (r < 0) |
3341 | return r; | |
3342 | ||
356779df | 3343 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3344 | } else |
3345 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3346 | ||
3347 | if (r < 0) | |
3348 | return r; | |
3349 | ||
3350 | if (bus->output_fd != bus->input_fd) { | |
3351 | assert(bus->output_fd >= 0); | |
3352 | ||
3353 | if (!bus->output_io_event_source) { | |
151b9b96 | 3354 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3355 | if (r < 0) |
3356 | return r; | |
3357 | ||
3358 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3359 | if (r < 0) |
3360 | return r; | |
3361 | ||
356779df | 3362 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3363 | } else |
3364 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3365 | ||
3366 | if (r < 0) | |
3367 | return r; | |
3368 | } | |
3369 | ||
3370 | return 0; | |
3371 | } | |
3372 | ||
8a5cd31e | 3373 | static void bus_detach_io_events(sd_bus *bus) { |
1e05d493 LP |
3374 | assert(bus); |
3375 | ||
3376 | if (bus->input_io_event_source) { | |
3377 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3378 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3379 | } | |
3380 | ||
3381 | if (bus->output_io_event_source) { | |
3382 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3383 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3384 | } | |
3385 | } | |
3386 | ||
8a5cd31e LP |
3387 | int bus_attach_inotify_event(sd_bus *bus) { |
3388 | int r; | |
3389 | ||
3390 | assert(bus); | |
3391 | ||
3392 | if (bus->inotify_fd < 0) | |
3393 | return 0; | |
3394 | ||
3395 | if (!bus->event) | |
3396 | return 0; | |
3397 | ||
3398 | if (!bus->inotify_event_source) { | |
3399 | r = sd_event_add_io(bus->event, &bus->inotify_event_source, bus->inotify_fd, EPOLLIN, io_callback, bus); | |
3400 | if (r < 0) | |
3401 | return r; | |
3402 | ||
3403 | r = sd_event_source_set_priority(bus->inotify_event_source, bus->event_priority); | |
3404 | if (r < 0) | |
3405 | return r; | |
3406 | ||
3407 | r = sd_event_source_set_description(bus->inotify_event_source, "bus-inotify"); | |
3408 | } else | |
3409 | r = sd_event_source_set_io_fd(bus->inotify_event_source, bus->inotify_fd); | |
3410 | if (r < 0) | |
3411 | return r; | |
3412 | ||
3413 | return 0; | |
3414 | } | |
3415 | ||
3416 | static void bus_detach_inotify_event(sd_bus *bus) { | |
3417 | assert(bus); | |
3418 | ||
3419 | if (bus->inotify_event_source) { | |
3420 | sd_event_source_set_enabled(bus->inotify_event_source, SD_EVENT_OFF); | |
3421 | bus->inotify_event_source = sd_event_source_unref(bus->inotify_event_source); | |
3422 | } | |
3423 | } | |
3424 | ||
d9f644e2 | 3425 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3426 | int r; |
3427 | ||
3428 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3429 | assert_return(!bus->event, -EBUSY); |
3430 | ||
3431 | assert(!bus->input_io_event_source); | |
3432 | assert(!bus->output_io_event_source); | |
3433 | assert(!bus->time_event_source); | |
3434 | ||
76b54375 LP |
3435 | if (event) |
3436 | bus->event = sd_event_ref(event); | |
3437 | else { | |
3438 | r = sd_event_default(&bus->event); | |
3439 | if (r < 0) | |
3440 | return r; | |
3441 | } | |
40ca29a1 | 3442 | |
1e05d493 | 3443 | bus->event_priority = priority; |
40ca29a1 | 3444 | |
6a0f1f6d | 3445 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3446 | if (r < 0) |
3447 | goto fail; | |
3448 | ||
3449 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3450 | if (r < 0) | |
3451 | goto fail; | |
3452 | ||
356779df | 3453 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3454 | if (r < 0) |
3455 | goto fail; | |
3456 | ||
151b9b96 | 3457 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3458 | if (r < 0) |
3459 | goto fail; | |
3460 | ||
356779df | 3461 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3462 | if (r < 0) |
3463 | goto fail; | |
3464 | ||
8a5cd31e LP |
3465 | r = bus_attach_io_events(bus); |
3466 | if (r < 0) | |
3467 | goto fail; | |
3468 | ||
3469 | r = bus_attach_inotify_event(bus); | |
1e05d493 LP |
3470 | if (r < 0) |
3471 | goto fail; | |
3472 | ||
40ca29a1 LP |
3473 | return 0; |
3474 | ||
3475 | fail: | |
3476 | sd_bus_detach_event(bus); | |
3477 | return r; | |
3478 | } | |
3479 | ||
d9f644e2 | 3480 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3481 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3482 | |
3483 | if (!bus->event) | |
3484 | return 0; | |
40ca29a1 | 3485 | |
8a5cd31e LP |
3486 | bus_detach_io_events(bus); |
3487 | bus_detach_inotify_event(bus); | |
40ca29a1 | 3488 | |
86befb40 LP |
3489 | if (bus->time_event_source) { |
3490 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3491 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3492 | } |
40ca29a1 | 3493 | |
86befb40 LP |
3494 | if (bus->quit_event_source) { |
3495 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3496 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3497 | } |
abc5fe72 | 3498 | |
93f1bcf4 | 3499 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3500 | return 1; |
40ca29a1 | 3501 | } |
affff0b6 | 3502 | |
2be44176 LP |
3503 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3504 | assert_return(bus, NULL); | |
3505 | ||
3506 | return bus->event; | |
3507 | } | |
3508 | ||
19befb2d LP |
3509 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3510 | assert_return(bus, NULL); | |
3511 | ||
3512 | return bus->current_message; | |
3513 | } | |
3514 | ||
3515 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3516 | assert_return(bus, NULL); |
3517 | ||
19befb2d | 3518 | return bus->current_slot; |
affff0b6 | 3519 | } |
76b54375 | 3520 | |
caa82984 LP |
3521 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3522 | assert_return(bus, NULL); | |
3523 | ||
3524 | return bus->current_handler; | |
3525 | } | |
3526 | ||
3527 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3528 | assert_return(bus, NULL); | |
3529 | ||
3530 | return bus->current_userdata; | |
3531 | } | |
3532 | ||
76b54375 LP |
3533 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3534 | sd_bus *b = NULL; | |
3535 | int r; | |
3536 | ||
3537 | assert(bus_open); | |
3538 | assert(default_bus); | |
3539 | ||
3540 | if (!ret) | |
3541 | return !!*default_bus; | |
3542 | ||
3543 | if (*default_bus) { | |
3544 | *ret = sd_bus_ref(*default_bus); | |
3545 | return 0; | |
3546 | } | |
3547 | ||
3548 | r = bus_open(&b); | |
3549 | if (r < 0) | |
3550 | return r; | |
3551 | ||
3552 | b->default_bus_ptr = default_bus; | |
3553 | b->tid = gettid(); | |
3554 | *default_bus = b; | |
3555 | ||
3556 | *ret = b; | |
3557 | return 1; | |
3558 | } | |
3559 | ||
3560 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3561 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3562 | } | |
3563 | ||
76b54375 | 3564 | |
fa2f8973 | 3565 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3566 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3567 | } | |
3568 | ||
af08d2f9 LP |
3569 | _public_ int sd_bus_default(sd_bus **ret) { |
3570 | ||
3571 | const char *e; | |
3572 | ||
3573 | /* Let's try our best to reuse another cached connection. If | |
3574 | * the starter bus type is set, connect via our normal | |
3575 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3576 | * we can share the connection with the user/system default | |
3577 | * bus. */ | |
3578 | ||
3579 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3580 | if (e) { | |
3581 | if (streq(e, "system")) | |
3582 | return sd_bus_default_system(ret); | |
09365592 | 3583 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3584 | return sd_bus_default_user(ret); |
3585 | } | |
3586 | ||
3587 | /* No type is specified, so we have not other option than to | |
3588 | * use the starter address if it is set. */ | |
af08d2f9 | 3589 | e = secure_getenv("DBUS_STARTER_ADDRESS"); |
b33652fe | 3590 | if (e) |
af08d2f9 | 3591 | return bus_default(sd_bus_open, &default_starter_bus, ret); |
af08d2f9 LP |
3592 | |
3593 | /* Finally, if nothing is set use the cached connection for | |
3594 | * the right scope */ | |
3595 | ||
3596 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3597 | return sd_bus_default_user(ret); | |
3598 | else | |
3599 | return sd_bus_default_system(ret); | |
3600 | } | |
3601 | ||
76b54375 LP |
3602 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3603 | assert_return(b, -EINVAL); | |
3604 | assert_return(tid, -EINVAL); | |
3605 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3606 | ||
3607 | if (b->tid != 0) { | |
3608 | *tid = b->tid; | |
3609 | return 0; | |
3610 | } | |
3611 | ||
3612 | if (b->event) | |
3613 | return sd_event_get_tid(b->event, tid); | |
3614 | ||
3615 | return -ENXIO; | |
3616 | } | |
28383ba1 | 3617 | |
a6278b88 LP |
3618 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3619 | _cleanup_free_ char *e = NULL; | |
3620 | char *ret; | |
3621 | ||
3622 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3623 | assert_return(external_id, -EINVAL); | |
3624 | assert_return(ret_path, -EINVAL); | |
3625 | ||
3626 | e = bus_label_escape(external_id); | |
3627 | if (!e) | |
3628 | return -ENOMEM; | |
3629 | ||
605405c6 | 3630 | ret = strjoin(prefix, "/", e); |
a6278b88 LP |
3631 | if (!ret) |
3632 | return -ENOMEM; | |
3633 | ||
3634 | *ret_path = ret; | |
3635 | return 0; | |
28383ba1 LP |
3636 | } |
3637 | ||
a6278b88 LP |
3638 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3639 | const char *e; | |
3640 | char *ret; | |
3641 | ||
3642 | assert_return(object_path_is_valid(path), -EINVAL); | |
3643 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3644 | assert_return(external_id, -EINVAL); | |
3645 | ||
3646 | e = object_path_startswith(path, prefix); | |
3647 | if (!e) { | |
3648 | *external_id = NULL; | |
3649 | return 0; | |
3650 | } | |
3651 | ||
3652 | ret = bus_label_unescape(e); | |
3653 | if (!ret) | |
3654 | return -ENOMEM; | |
3655 | ||
3656 | *external_id = ret; | |
3657 | return 1; | |
28383ba1 | 3658 | } |
5b12334d | 3659 | |
dfb815c3 DH |
3660 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3661 | _cleanup_strv_free_ char **labels = NULL; | |
3662 | char *path, *path_pos, **label_pos; | |
3663 | const char *sep, *template_pos; | |
3664 | size_t path_length; | |
3665 | va_list list; | |
3666 | int r; | |
3667 | ||
3668 | assert_return(out, -EINVAL); | |
3669 | assert_return(path_template, -EINVAL); | |
3670 | ||
3671 | path_length = strlen(path_template); | |
3672 | ||
19932084 | 3673 | va_start(list, path_template); |
dfb815c3 DH |
3674 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3675 | const char *arg; | |
3676 | char *label; | |
3677 | ||
3678 | arg = va_arg(list, const char *); | |
3679 | if (!arg) { | |
3680 | va_end(list); | |
3681 | return -EINVAL; | |
3682 | } | |
3683 | ||
3684 | label = bus_label_escape(arg); | |
3685 | if (!label) { | |
3686 | va_end(list); | |
3687 | return -ENOMEM; | |
3688 | } | |
3689 | ||
3690 | r = strv_consume(&labels, label); | |
3691 | if (r < 0) { | |
3692 | va_end(list); | |
3693 | return r; | |
3694 | } | |
3695 | ||
3696 | /* add label length, but account for the format character */ | |
3697 | path_length += strlen(label) - 1; | |
3698 | } | |
3699 | va_end(list); | |
3700 | ||
3701 | path = malloc(path_length + 1); | |
3702 | if (!path) | |
3703 | return -ENOMEM; | |
3704 | ||
3705 | path_pos = path; | |
3706 | label_pos = labels; | |
3707 | ||
3708 | for (template_pos = path_template; *template_pos; ) { | |
3709 | sep = strchrnul(template_pos, '%'); | |
3710 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3711 | if (!*sep) | |
3712 | break; | |
3713 | ||
3714 | path_pos = stpcpy(path_pos, *label_pos++); | |
3715 | template_pos = sep + 1; | |
3716 | } | |
3717 | ||
3718 | *path_pos = 0; | |
3719 | *out = path; | |
3720 | return 0; | |
3721 | } | |
3722 | ||
3723 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3724 | _cleanup_strv_free_ char **labels = NULL; | |
3725 | const char *template_pos, *path_pos; | |
3726 | char **label_pos; | |
3727 | va_list list; | |
3728 | int r; | |
3729 | ||
3730 | /* | |
3731 | * This decodes an object-path based on a template argument. The | |
3732 | * template consists of a verbatim path, optionally including special | |
3733 | * directives: | |
3734 | * | |
3735 | * - Each occurrence of '%' in the template matches an arbitrary | |
3736 | * substring of a label in the given path. At most one such | |
3737 | * directive is allowed per label. For each such directive, the | |
3738 | * caller must provide an output parameter (char **) via va_arg. If | |
3739 | * NULL is passed, the given label is verified, but not returned. | |
3740 | * For each matched label, the *decoded* label is stored in the | |
3741 | * passed output argument, and the caller is responsible to free | |
3742 | * it. Note that the output arguments are only modified if the | |
3743 | * actualy path matched the template. Otherwise, they're left | |
3744 | * untouched. | |
3745 | * | |
3746 | * This function returns <0 on error, 0 if the path does not match the | |
3747 | * template, 1 if it matched. | |
3748 | */ | |
3749 | ||
3750 | assert_return(path, -EINVAL); | |
3751 | assert_return(path_template, -EINVAL); | |
3752 | ||
3753 | path_pos = path; | |
3754 | ||
3755 | for (template_pos = path_template; *template_pos; ) { | |
3756 | const char *sep; | |
3757 | size_t length; | |
3758 | char *label; | |
3759 | ||
3760 | /* verify everything until the next '%' matches verbatim */ | |
3761 | sep = strchrnul(template_pos, '%'); | |
3762 | length = sep - template_pos; | |
3763 | if (strncmp(path_pos, template_pos, length)) | |
3764 | return 0; | |
3765 | ||
3766 | path_pos += length; | |
3767 | template_pos += length; | |
3768 | ||
3769 | if (!*template_pos) | |
3770 | break; | |
3771 | ||
3772 | /* We found the next '%' character. Everything up until here | |
3773 | * matched. We now skip ahead to the end of this label and make | |
3774 | * sure it matches the tail of the label in the path. Then we | |
3775 | * decode the string in-between and save it for later use. */ | |
3776 | ||
3777 | ++template_pos; /* skip over '%' */ | |
3778 | ||
3779 | sep = strchrnul(template_pos, '/'); | |
3780 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3781 | ||
3782 | /* verify the suffixes match */ | |
3783 | sep = strchrnul(path_pos, '/'); | |
3784 | if (sep - path_pos < (ssize_t)length || | |
3785 | strncmp(sep - length, template_pos, length)) | |
3786 | return 0; | |
3787 | ||
3788 | template_pos += length; /* skip over matched label */ | |
3789 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3790 | ||
3791 | /* store unescaped label for later use */ | |
3792 | label = bus_label_unescape_n(path_pos, length); | |
3793 | if (!label) | |
3794 | return -ENOMEM; | |
3795 | ||
3796 | r = strv_consume(&labels, label); | |
3797 | if (r < 0) | |
3798 | return r; | |
3799 | ||
3800 | path_pos = sep; /* skip decoded label and suffix */ | |
3801 | } | |
3802 | ||
3803 | /* end of template must match end of path */ | |
3804 | if (*path_pos) | |
3805 | return 0; | |
3806 | ||
3807 | /* copy the labels over to the caller */ | |
19932084 | 3808 | va_start(list, path_template); |
dfb815c3 DH |
3809 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3810 | char **arg; | |
3811 | ||
3812 | arg = va_arg(list, char **); | |
3813 | if (arg) | |
3814 | *arg = *label_pos; | |
3815 | else | |
3816 | free(*label_pos); | |
3817 | } | |
3818 | va_end(list); | |
3819 | ||
86ed6d1b | 3820 | labels = mfree(labels); |
dfb815c3 DH |
3821 | return 1; |
3822 | } | |
3823 | ||
ae095f86 | 3824 | _public_ int sd_bus_try_close(sd_bus *bus) { |
ae095f86 | 3825 | assert_return(bus, -EINVAL); |
ae095f86 | 3826 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 | 3827 | |
a132bef0 | 3828 | return -EOPNOTSUPP; |
ae095f86 | 3829 | } |
5972fe95 | 3830 | |
455971c1 | 3831 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3832 | assert_return(bus, -EINVAL); |
455971c1 | 3833 | assert_return(description, -EINVAL); |
f4b2933e | 3834 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3835 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3836 | ||
455971c1 | 3837 | *description = bus->description; |
5972fe95 LP |
3838 | return 0; |
3839 | } | |
fe3f22d1 DK |
3840 | |
3841 | int bus_get_root_path(sd_bus *bus) { | |
3842 | int r; | |
3843 | ||
3844 | if (bus->cgroup_root) | |
3845 | return 0; | |
3846 | ||
3847 | r = cg_get_root_path(&bus->cgroup_root); | |
3848 | if (r == -ENOENT) { | |
3849 | bus->cgroup_root = strdup("/"); | |
3850 | if (!bus->cgroup_root) | |
3851 | return -ENOMEM; | |
3852 | ||
3853 | r = 0; | |
3854 | } | |
3855 | ||
3856 | return r; | |
3857 | } | |
3acc1daf LP |
3858 | |
3859 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3acc1daf LP |
3860 | assert_return(bus, -EINVAL); |
3861 | assert_return(scope, -EINVAL); | |
3862 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3863 | ||
3acc1daf LP |
3864 | if (bus->is_user) { |
3865 | *scope = "user"; | |
5b820358 | 3866 | return 0; |
3acc1daf LP |
3867 | } |
3868 | ||
3869 | if (bus->is_system) { | |
3870 | *scope = "system"; | |
5b820358 LP |
3871 | return 0; |
3872 | } | |
3873 | ||
3874 | return -ENODATA; | |
3875 | } | |
3876 | ||
3877 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3878 | ||
3879 | assert_return(bus, -EINVAL); | |
3880 | assert_return(address, -EINVAL); | |
3881 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3882 | ||
3883 | if (bus->address) { | |
3884 | *address = bus->address; | |
3885 | return 0; | |
3acc1daf LP |
3886 | } |
3887 | ||
3888 | return -ENODATA; | |
3889 | } | |
224b3787 | 3890 | |
882897af | 3891 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3892 | assert_return(bus, -EINVAL); |
3893 | assert_return(mask, -EINVAL); | |
3894 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3895 | ||
3896 | *mask = bus->creds_mask; | |
3897 | return 0; | |
3898 | } | |
3899 | ||
882897af | 3900 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3901 | assert_return(bus, -EINVAL); |
3902 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3903 | ||
3904 | return bus->bus_client; | |
3905 | } | |
3906 | ||
882897af | 3907 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3908 | assert_return(bus, -EINVAL); |
3909 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3910 | ||
3911 | return bus->is_server; | |
3912 | } | |
3913 | ||
882897af | 3914 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3915 | assert_return(bus, -EINVAL); |
3916 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3917 | ||
3918 | return bus->anonymous_auth; | |
3919 | } | |
3920 | ||
882897af | 3921 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3922 | assert_return(bus, -EINVAL); |
3923 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3924 | ||
3925 | return bus->trusted; | |
3926 | } | |
3927 | ||
882897af | 3928 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3929 | assert_return(bus, -EINVAL); |
3930 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3931 | ||
c7db1984 | 3932 | return bus->is_monitor; |
224b3787 | 3933 | } |
fa2f8973 LP |
3934 | |
3935 | static void flush_close(sd_bus *bus) { | |
3936 | if (!bus) | |
3937 | return; | |
3938 | ||
3939 | /* Flushes and closes the specified bus. We take a ref before, | |
3940 | * to ensure the flushing does not cause the bus to be | |
3941 | * unreferenced. */ | |
3942 | ||
3943 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
3944 | } | |
3945 | ||
3946 | _public_ void sd_bus_default_flush_close(void) { | |
3947 | flush_close(default_starter_bus); | |
3948 | flush_close(default_user_bus); | |
3949 | flush_close(default_system_bus); | |
3950 | } | |
fbb4603d LP |
3951 | |
3952 | _public_ int sd_bus_set_exit_on_disconnect(sd_bus *bus, int b) { | |
3953 | assert_return(bus, -EINVAL); | |
3954 | ||
3955 | /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already | |
3956 | * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never | |
3957 | * from the client side. */ | |
3958 | bus->exit_on_disconnect = b; | |
3959 | ||
3960 | /* If the exit condition was triggered already, exit immediately. */ | |
3961 | return bus_exit_now(bus); | |
3962 | } | |
3963 | ||
3964 | _public_ int sd_bus_get_exit_on_disconnect(sd_bus *bus) { | |
3965 | assert_return(bus, -EINVAL); | |
3966 | ||
3967 | return bus->exit_on_disconnect; | |
3968 | } | |
48ef41a3 LP |
3969 | |
3970 | _public_ int sd_bus_set_sender(sd_bus *bus, const char *sender) { | |
3971 | assert_return(bus, -EINVAL); | |
3972 | assert_return(!bus->bus_client, -EPERM); | |
3973 | assert_return(!sender || service_name_is_valid(sender), -EINVAL); | |
3974 | ||
3975 | return free_and_strdup(&bus->patch_sender, sender); | |
3976 | } | |
3977 | ||
3978 | _public_ int sd_bus_get_sender(sd_bus *bus, const char **ret) { | |
3979 | assert_return(bus, -EINVAL); | |
3980 | assert_return(ret, -EINVAL); | |
3981 | ||
3982 | if (!bus->patch_sender) | |
3983 | return -ENODATA; | |
3984 | ||
3985 | *ret = bus->patch_sender; | |
3986 | return 0; | |
3987 | } |