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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <endian.h> | |
de1c301e LP |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
25 | #include <netdb.h> | |
0a6f50c0 | 26 | #include <poll.h> |
63edf05e | 27 | #include <sys/mman.h> |
45fbe937 | 28 | #include <pthread.h> |
de1c301e LP |
29 | |
30 | #include "util.h" | |
31 | #include "macro.h" | |
2fd9ae2e | 32 | #include "strv.h" |
6c03089c | 33 | #include "missing.h" |
ab9001a1 | 34 | #include "def.h" |
af08d2f9 | 35 | #include "cgroup-util.h" |
f01de965 | 36 | #include "bus-label.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
992c052c | 45 | #include "bus-objects.h" |
40ca29a1 | 46 | #include "bus-util.h" |
a7893c6b | 47 | #include "bus-container.h" |
0461f8cd | 48 | #include "bus-protocol.h" |
8f8f05a9 | 49 | #include "bus-track.h" |
19befb2d | 50 | #include "bus-slot.h" |
de1c301e | 51 | |
f9f97ca6 UTL |
52 | #define log_debug_bus_message(m) do { \ |
53 | sd_bus_message *_m = (m); \ | |
348d8cc8 | 54 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", \ |
f9f97ca6 UTL |
55 | bus_message_type_to_string(_m->header->type), \ |
56 | strna(sd_bus_message_get_sender(_m)), \ | |
57 | strna(sd_bus_message_get_destination(_m)), \ | |
58 | strna(sd_bus_message_get_path(_m)), \ | |
59 | strna(sd_bus_message_get_interface(_m)), \ | |
60 | strna(sd_bus_message_get_member(_m)), \ | |
61 | BUS_MESSAGE_COOKIE(_m), \ | |
62 | _m->reply_cookie, \ | |
63 | strna(_m->error.message)); \ | |
64 | } while (false) | |
65 | ||
e3017af9 | 66 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
67 | static int attach_io_events(sd_bus *b); |
68 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 69 | |
f54514f3 LP |
70 | static void bus_close_fds(sd_bus *b) { |
71 | assert(b); | |
72 | ||
1e05d493 LP |
73 | detach_io_events(b); |
74 | ||
f54514f3 | 75 | if (b->input_fd >= 0) |
03e334a1 | 76 | safe_close(b->input_fd); |
f54514f3 LP |
77 | |
78 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
03e334a1 | 79 | safe_close(b->output_fd); |
f54514f3 LP |
80 | |
81 | b->input_fd = b->output_fd = -1; | |
82 | } | |
83 | ||
0e586eae | 84 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
85 | assert(b); |
86 | ||
f389bf15 LP |
87 | while (b->rqueue_size > 0) |
88 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
89 | ||
0e586eae | 90 | free(b->rqueue); |
f389bf15 LP |
91 | b->rqueue = NULL; |
92 | b->rqueue_allocated = 0; | |
0e586eae | 93 | |
f389bf15 LP |
94 | while (b->wqueue_size > 0) |
95 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 96 | |
f389bf15 LP |
97 | free(b->wqueue); |
98 | b->wqueue = NULL; | |
99 | b->wqueue_allocated = 0; | |
0e586eae LP |
100 | } |
101 | ||
de1c301e | 102 | static void bus_free(sd_bus *b) { |
19befb2d | 103 | sd_bus_slot *s; |
de1c301e LP |
104 | |
105 | assert(b); | |
8f8f05a9 LP |
106 | assert(!b->track_queue); |
107 | ||
19befb2d LP |
108 | b->state = BUS_CLOSED; |
109 | ||
40ca29a1 LP |
110 | sd_bus_detach_event(b); |
111 | ||
19befb2d LP |
112 | while ((s = b->slots)) { |
113 | /* At this point only floating slots can still be | |
114 | * around, because the non-floating ones keep a | |
115 | * reference to the bus, and we thus couldn't be | |
116 | * destructing right now... We forcibly disconnect the | |
117 | * slots here, so that they still can be referenced by | |
118 | * apps, but are dead. */ | |
119 | ||
120 | assert(s->floating); | |
121 | bus_slot_disconnect(s); | |
122 | sd_bus_slot_unref(s); | |
123 | } | |
124 | ||
f4d140e9 LP |
125 | if (b->default_bus_ptr) |
126 | *b->default_bus_ptr = NULL; | |
127 | ||
f54514f3 | 128 | bus_close_fds(b); |
de1c301e | 129 | |
63edf05e LP |
130 | if (b->kdbus_buffer) |
131 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
132 | ||
de1c301e | 133 | free(b->rbuffer); |
89ffcd2a | 134 | free(b->unique_name); |
2181a7f5 | 135 | free(b->auth_buffer); |
89ffcd2a | 136 | free(b->address); |
e9a967f9 | 137 | free(b->kernel); |
a7893c6b | 138 | free(b->machine); |
8a0e0ed9 | 139 | free(b->fake_label); |
751bc6ac | 140 | free(b->cgroup_root); |
455971c1 | 141 | free(b->description); |
89ffcd2a | 142 | |
2fd9ae2e LP |
143 | free(b->exec_path); |
144 | strv_free(b->exec_argv); | |
145 | ||
2c93b4ef LP |
146 | close_many(b->fds, b->n_fds); |
147 | free(b->fds); | |
148 | ||
0e586eae | 149 | bus_reset_queues(b); |
de1c301e | 150 | |
c9fe4af7 | 151 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 152 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 153 | |
75a0da95 | 154 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
155 | bus_match_free(&b->match_callbacks); |
156 | ||
29ddb38f LP |
157 | hashmap_free_free(b->vtable_methods); |
158 | hashmap_free_free(b->vtable_properties); | |
159 | ||
19befb2d | 160 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
161 | hashmap_free(b->nodes); |
162 | ||
bc7fd8cd LP |
163 | bus_kernel_flush_memfd(b); |
164 | ||
45fbe937 LP |
165 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
166 | ||
de1c301e LP |
167 | free(b); |
168 | } | |
169 | ||
d9f644e2 | 170 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
171 | sd_bus *r; |
172 | ||
d6888822 | 173 | assert_return(ret, -EINVAL); |
021a1e78 | 174 | |
de1c301e LP |
175 | r = new0(sd_bus, 1); |
176 | if (!r) | |
021a1e78 | 177 | return -ENOMEM; |
de1c301e | 178 | |
e4ee6e5c | 179 | r->n_ref = REFCNT_INIT; |
e82c9509 | 180 | r->input_fd = r->output_fd = -1; |
de1c301e | 181 | r->message_version = 1; |
3310dfd5 | 182 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 183 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 184 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 185 | r->original_pid = getpid(); |
de1c301e | 186 | |
45fbe937 LP |
187 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
188 | ||
de1c301e LP |
189 | /* We guarantee that wqueue always has space for at least one |
190 | * entry */ | |
821e0756 | 191 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 192 | free(r); |
021a1e78 | 193 | return -ENOMEM; |
de1c301e LP |
194 | } |
195 | ||
021a1e78 LP |
196 | *ret = r; |
197 | return 0; | |
198 | } | |
199 | ||
d9f644e2 | 200 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
201 | char *a; |
202 | ||
d6888822 LP |
203 | assert_return(bus, -EINVAL); |
204 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
205 | assert_return(address, -EINVAL); | |
206 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
207 | |
208 | a = strdup(address); | |
209 | if (!a) | |
210 | return -ENOMEM; | |
211 | ||
212 | free(bus->address); | |
213 | bus->address = a; | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
d9f644e2 | 218 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
219 | assert_return(bus, -EINVAL); |
220 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
221 | assert_return(input_fd >= 0, -EINVAL); | |
222 | assert_return(output_fd >= 0, -EINVAL); | |
223 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 224 | |
e82c9509 LP |
225 | bus->input_fd = input_fd; |
226 | bus->output_fd = output_fd; | |
021a1e78 LP |
227 | return 0; |
228 | } | |
229 | ||
d9f644e2 | 230 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
231 | char *p, **a; |
232 | ||
d6888822 LP |
233 | assert_return(bus, -EINVAL); |
234 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
235 | assert_return(path, -EINVAL); | |
236 | assert_return(!strv_isempty(argv), -EINVAL); | |
237 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
238 | |
239 | p = strdup(path); | |
240 | if (!p) | |
241 | return -ENOMEM; | |
242 | ||
243 | a = strv_copy(argv); | |
244 | if (!a) { | |
245 | free(p); | |
246 | return -ENOMEM; | |
247 | } | |
248 | ||
249 | free(bus->exec_path); | |
250 | strv_free(bus->exec_argv); | |
251 | ||
252 | bus->exec_path = p; | |
253 | bus->exec_argv = a; | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
d9f644e2 | 258 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
259 | assert_return(bus, -EINVAL); |
260 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
261 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 262 | |
94bbf1ba | 263 | bus->bus_client = !!b; |
021a1e78 LP |
264 | return 0; |
265 | } | |
266 | ||
09365592 LP |
267 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
268 | assert_return(bus, -EINVAL); | |
269 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
270 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
271 | ||
272 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
273 | return 0; | |
274 | } | |
275 | ||
d9f644e2 | 276 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
277 | assert_return(bus, -EINVAL); |
278 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
279 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 280 | |
264ad849 LP |
281 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
282 | return 0; | |
283 | } | |
284 | ||
4fc31988 | 285 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 286 | uint64_t new_flags; |
16be4368 | 287 | assert_return(bus, -EINVAL); |
b5dae4c7 | 288 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
289 | assert_return(!bus_pid_changed(bus), -ECHILD); |
290 | ||
b5dae4c7 LP |
291 | new_flags = bus->attach_flags; |
292 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
293 | ||
294 | if (bus->attach_flags == new_flags) | |
295 | return 0; | |
296 | ||
297 | bus->attach_flags = new_flags; | |
298 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
299 | bus_kernel_realize_attach_flags(bus); | |
300 | ||
16be4368 KS |
301 | return 0; |
302 | } | |
303 | ||
b5dae4c7 LP |
304 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
305 | uint64_t new_flags; | |
306 | ||
16be4368 | 307 | assert_return(bus, -EINVAL); |
95c4fe82 | 308 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 309 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
310 | assert_return(!bus_pid_changed(bus), -ECHILD); |
311 | ||
b5dae4c7 LP |
312 | if (b) |
313 | bus->creds_mask |= mask; | |
314 | else | |
315 | bus->creds_mask &= ~mask; | |
316 | ||
49b832c5 | 317 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
318 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
319 | ||
320 | /* Make sure we don't lose the timestamp flag */ | |
321 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
322 | if (bus->attach_flags == new_flags) | |
323 | return 0; | |
49b832c5 | 324 | |
b5dae4c7 LP |
325 | bus->attach_flags = new_flags; |
326 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
327 | bus_kernel_realize_attach_flags(bus); | |
328 | ||
329 | return 0; | |
021a1e78 | 330 | } |
de1c301e | 331 | |
d9f644e2 | 332 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
333 | assert_return(bus, -EINVAL); |
334 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
335 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
336 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
337 | |
338 | bus->is_server = !!b; | |
98178d39 | 339 | bus->server_id = server_id; |
2181a7f5 LP |
340 | return 0; |
341 | } | |
342 | ||
d9f644e2 | 343 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
344 | assert_return(bus, -EINVAL); |
345 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
346 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
347 | |
348 | bus->anonymous_auth = !!b; | |
349 | return 0; | |
350 | } | |
351 | ||
adacb957 LP |
352 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
353 | assert_return(bus, -EINVAL); | |
354 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
355 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
356 | ||
357 | bus->trusted = !!b; | |
358 | return 0; | |
359 | } | |
360 | ||
455971c1 | 361 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 362 | assert_return(bus, -EINVAL); |
5972fe95 LP |
363 | assert_return(bus->state == BUS_UNSET, -EPERM); |
364 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
365 | ||
d1b91c99 | 366 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
367 | } |
368 | ||
c0765ddb LP |
369 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
370 | assert_return(bus, -EINVAL); | |
371 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
372 | ||
373 | bus->allow_interactive_authorization = !!b; | |
374 | return 0; | |
375 | } | |
376 | ||
377 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
378 | assert_return(bus, -EINVAL); | |
379 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
380 | ||
381 | return bus->allow_interactive_authorization; | |
382 | } | |
383 | ||
19070062 | 384 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 385 | const char *s; |
19070062 | 386 | sd_bus *bus; |
de1c301e LP |
387 | int r; |
388 | ||
19070062 LP |
389 | assert(reply); |
390 | bus = reply->bus; | |
de1c301e | 391 | assert(bus); |
c99c09a2 | 392 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 393 | |
40ca29a1 | 394 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
395 | if (r > 0) |
396 | return -r; | |
eb01ba5d | 397 | |
de1c301e LP |
398 | r = sd_bus_message_read(reply, "s", &s); |
399 | if (r < 0) | |
400 | return r; | |
401 | ||
dafb7591 LP |
402 | if (!service_name_is_valid(s) || s[0] != ':') |
403 | return -EBADMSG; | |
404 | ||
de1c301e LP |
405 | bus->unique_name = strdup(s); |
406 | if (!bus->unique_name) | |
407 | return -ENOMEM; | |
408 | ||
c99c09a2 LP |
409 | if (bus->state == BUS_HELLO) |
410 | bus->state = BUS_RUNNING; | |
dafb7591 | 411 | |
de1c301e LP |
412 | return 1; |
413 | } | |
414 | ||
415 | static int bus_send_hello(sd_bus *bus) { | |
416 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
417 | int r; | |
418 | ||
419 | assert(bus); | |
420 | ||
6629161f | 421 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
422 | return 0; |
423 | ||
de1c301e LP |
424 | r = sd_bus_message_new_method_call( |
425 | bus, | |
151b9b96 | 426 | &m, |
de1c301e | 427 | "org.freedesktop.DBus", |
a7639e37 | 428 | "/org/freedesktop/DBus", |
de1c301e | 429 | "org.freedesktop.DBus", |
151b9b96 | 430 | "Hello"); |
de1c301e LP |
431 | if (r < 0) |
432 | return r; | |
433 | ||
19befb2d | 434 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
435 | } |
436 | ||
a7e3212d | 437 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
438 | assert(bus); |
439 | ||
f08838da | 440 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 441 | bus->state = BUS_HELLO; |
e3017af9 | 442 | return 1; |
de1c301e LP |
443 | } |
444 | ||
445 | bus->state = BUS_RUNNING; | |
e3017af9 | 446 | return 1; |
de1c301e LP |
447 | } |
448 | ||
449 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 450 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
451 | const char *a; |
452 | char *r = NULL; | |
453 | ||
454 | assert(p); | |
455 | assert(*p); | |
de1c301e LP |
456 | assert(value); |
457 | ||
2fd9ae2e LP |
458 | if (key) { |
459 | l = strlen(key); | |
460 | if (strncmp(*p, key, l) != 0) | |
461 | return 0; | |
de1c301e | 462 | |
2fd9ae2e LP |
463 | if ((*p)[l] != '=') |
464 | return 0; | |
de1c301e | 465 | |
2fd9ae2e LP |
466 | if (*value) |
467 | return -EINVAL; | |
de1c301e | 468 | |
2fd9ae2e LP |
469 | a = *p + l + 1; |
470 | } else | |
471 | a = *p; | |
472 | ||
473 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 474 | char c; |
de1c301e LP |
475 | |
476 | if (*a == '%') { | |
477 | int x, y; | |
478 | ||
479 | x = unhexchar(a[1]); | |
480 | if (x < 0) { | |
481 | free(r); | |
482 | return x; | |
483 | } | |
484 | ||
485 | y = unhexchar(a[2]); | |
486 | if (y < 0) { | |
487 | free(r); | |
488 | return y; | |
489 | } | |
490 | ||
de1c301e | 491 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
492 | a += 3; |
493 | } else { | |
de1c301e | 494 | c = *a; |
89ffcd2a LP |
495 | a++; |
496 | } | |
de1c301e | 497 | |
821e0756 | 498 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 499 | return -ENOMEM; |
de1c301e | 500 | |
de1c301e LP |
501 | r[n++] = c; |
502 | } | |
503 | ||
89ffcd2a LP |
504 | if (!r) { |
505 | r = strdup(""); | |
506 | if (!r) | |
507 | return -ENOMEM; | |
508 | } else | |
509 | r[n] = 0; | |
510 | ||
511 | if (*a == ',') | |
512 | a++; | |
513 | ||
de1c301e | 514 | *p = a; |
2fd9ae2e LP |
515 | |
516 | free(*value); | |
de1c301e | 517 | *value = r; |
2fd9ae2e | 518 | |
de1c301e LP |
519 | return 1; |
520 | } | |
521 | ||
522 | static void skip_address_key(const char **p) { | |
523 | assert(p); | |
524 | assert(*p); | |
525 | ||
89ffcd2a LP |
526 | *p += strcspn(*p, ","); |
527 | ||
528 | if (**p == ',') | |
529 | (*p) ++; | |
de1c301e LP |
530 | } |
531 | ||
2fd9ae2e LP |
532 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
533 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
534 | size_t l; | |
de1c301e LP |
535 | int r; |
536 | ||
537 | assert(b); | |
2fd9ae2e LP |
538 | assert(p); |
539 | assert(*p); | |
540 | assert(guid); | |
de1c301e | 541 | |
2fd9ae2e LP |
542 | while (**p != 0 && **p != ';') { |
543 | r = parse_address_key(p, "guid", guid); | |
544 | if (r < 0) | |
545 | return r; | |
546 | else if (r > 0) | |
547 | continue; | |
de1c301e | 548 | |
2fd9ae2e LP |
549 | r = parse_address_key(p, "path", &path); |
550 | if (r < 0) | |
551 | return r; | |
552 | else if (r > 0) | |
553 | continue; | |
de1c301e | 554 | |
2fd9ae2e LP |
555 | r = parse_address_key(p, "abstract", &abstract); |
556 | if (r < 0) | |
557 | return r; | |
558 | else if (r > 0) | |
559 | continue; | |
de1c301e | 560 | |
2fd9ae2e LP |
561 | skip_address_key(p); |
562 | } | |
de1c301e | 563 | |
2fd9ae2e LP |
564 | if (!path && !abstract) |
565 | return -EINVAL; | |
de1c301e | 566 | |
2fd9ae2e LP |
567 | if (path && abstract) |
568 | return -EINVAL; | |
569 | ||
570 | if (path) { | |
571 | l = strlen(path); | |
572 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
573 | return -E2BIG; | |
de1c301e | 574 | |
2fd9ae2e LP |
575 | b->sockaddr.un.sun_family = AF_UNIX; |
576 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
577 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
578 | } else if (abstract) { | |
579 | l = strlen(abstract); | |
580 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
581 | return -E2BIG; | |
582 | ||
583 | b->sockaddr.un.sun_family = AF_UNIX; | |
584 | b->sockaddr.un.sun_path[0] = 0; | |
585 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
586 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
587 | } | |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
592 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
593 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 594 | int r; |
b92bea5d ZJS |
595 | struct addrinfo *result, hints = { |
596 | .ai_socktype = SOCK_STREAM, | |
597 | .ai_flags = AI_ADDRCONFIG, | |
598 | }; | |
2fd9ae2e LP |
599 | |
600 | assert(b); | |
601 | assert(p); | |
602 | assert(*p); | |
603 | assert(guid); | |
604 | ||
605 | while (**p != 0 && **p != ';') { | |
606 | r = parse_address_key(p, "guid", guid); | |
607 | if (r < 0) | |
608 | return r; | |
609 | else if (r > 0) | |
610 | continue; | |
611 | ||
612 | r = parse_address_key(p, "host", &host); | |
613 | if (r < 0) | |
614 | return r; | |
615 | else if (r > 0) | |
616 | continue; | |
617 | ||
618 | r = parse_address_key(p, "port", &port); | |
619 | if (r < 0) | |
620 | return r; | |
621 | else if (r > 0) | |
622 | continue; | |
623 | ||
624 | r = parse_address_key(p, "family", &family); | |
625 | if (r < 0) | |
626 | return r; | |
627 | else if (r > 0) | |
628 | continue; | |
629 | ||
630 | skip_address_key(p); | |
631 | } | |
632 | ||
633 | if (!host || !port) | |
634 | return -EINVAL; | |
635 | ||
2fd9ae2e LP |
636 | if (family) { |
637 | if (streq(family, "ipv4")) | |
638 | hints.ai_family = AF_INET; | |
639 | else if (streq(family, "ipv6")) | |
640 | hints.ai_family = AF_INET6; | |
641 | else | |
642 | return -EINVAL; | |
643 | } | |
644 | ||
645 | r = getaddrinfo(host, port, &hints, &result); | |
646 | if (r == EAI_SYSTEM) | |
647 | return -errno; | |
648 | else if (r != 0) | |
649 | return -EADDRNOTAVAIL; | |
650 | ||
651 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
652 | b->sockaddr_size = result->ai_addrlen; | |
653 | ||
654 | freeaddrinfo(result); | |
655 | ||
656 | return 0; | |
657 | } | |
658 | ||
659 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
660 | char *path = NULL; | |
661 | unsigned n_argv = 0, j; | |
662 | char **argv = NULL; | |
821e0756 | 663 | size_t allocated = 0; |
2fd9ae2e LP |
664 | int r; |
665 | ||
666 | assert(b); | |
667 | assert(p); | |
668 | assert(*p); | |
669 | assert(guid); | |
670 | ||
671 | while (**p != 0 && **p != ';') { | |
672 | r = parse_address_key(p, "guid", guid); | |
673 | if (r < 0) | |
674 | goto fail; | |
675 | else if (r > 0) | |
676 | continue; | |
677 | ||
678 | r = parse_address_key(p, "path", &path); | |
679 | if (r < 0) | |
680 | goto fail; | |
681 | else if (r > 0) | |
682 | continue; | |
683 | ||
684 | if (startswith(*p, "argv")) { | |
685 | unsigned ul; | |
686 | ||
687 | errno = 0; | |
688 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 689 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
690 | r = -EINVAL; |
691 | goto fail; | |
692 | } | |
693 | ||
694 | (*p) ++; | |
695 | ||
696 | if (ul >= n_argv) { | |
821e0756 | 697 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
698 | r = -ENOMEM; |
699 | goto fail; | |
700 | } | |
701 | ||
2fd9ae2e LP |
702 | n_argv = ul + 1; |
703 | } | |
704 | ||
705 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 706 | if (r < 0) |
2fd9ae2e | 707 | goto fail; |
de1c301e | 708 | |
2fd9ae2e | 709 | continue; |
de1c301e LP |
710 | } |
711 | ||
2fd9ae2e LP |
712 | skip_address_key(p); |
713 | } | |
de1c301e | 714 | |
5a0f6033 LP |
715 | if (!path) { |
716 | r = -EINVAL; | |
2fd9ae2e | 717 | goto fail; |
5a0f6033 | 718 | } |
de1c301e | 719 | |
2fd9ae2e LP |
720 | /* Make sure there are no holes in the array, with the |
721 | * exception of argv[0] */ | |
722 | for (j = 1; j < n_argv; j++) | |
723 | if (!argv[j]) { | |
724 | r = -EINVAL; | |
725 | goto fail; | |
726 | } | |
727 | ||
728 | if (argv && argv[0] == NULL) { | |
729 | argv[0] = strdup(path); | |
730 | if (!argv[0]) { | |
731 | r = -ENOMEM; | |
732 | goto fail; | |
733 | } | |
734 | } | |
de1c301e | 735 | |
2fd9ae2e LP |
736 | b->exec_path = path; |
737 | b->exec_argv = argv; | |
738 | return 0; | |
de1c301e | 739 | |
2fd9ae2e LP |
740 | fail: |
741 | for (j = 0; j < n_argv; j++) | |
742 | free(argv[j]); | |
743 | ||
744 | free(argv); | |
745 | free(path); | |
746 | return r; | |
747 | } | |
748 | ||
6629161f LP |
749 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
750 | _cleanup_free_ char *path = NULL; | |
751 | int r; | |
752 | ||
753 | assert(b); | |
754 | assert(p); | |
755 | assert(*p); | |
756 | assert(guid); | |
757 | ||
758 | while (**p != 0 && **p != ';') { | |
759 | r = parse_address_key(p, "guid", guid); | |
760 | if (r < 0) | |
761 | return r; | |
762 | else if (r > 0) | |
763 | continue; | |
764 | ||
765 | r = parse_address_key(p, "path", &path); | |
766 | if (r < 0) | |
767 | return r; | |
768 | else if (r > 0) | |
769 | continue; | |
770 | ||
771 | skip_address_key(p); | |
772 | } | |
773 | ||
774 | if (!path) | |
775 | return -EINVAL; | |
776 | ||
777 | free(b->kernel); | |
778 | b->kernel = path; | |
779 | path = NULL; | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
bc9fd78c | 784 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 785 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
786 | int r; |
787 | ||
788 | assert(b); | |
789 | assert(p); | |
790 | assert(*p); | |
791 | assert(guid); | |
792 | ||
793 | while (**p != 0 && **p != ';') { | |
794 | r = parse_address_key(p, "guid", guid); | |
795 | if (r < 0) | |
796 | return r; | |
797 | else if (r > 0) | |
798 | continue; | |
799 | ||
800 | r = parse_address_key(p, "machine", &machine); | |
801 | if (r < 0) | |
802 | return r; | |
803 | else if (r > 0) | |
804 | continue; | |
805 | ||
ee502e0c LP |
806 | r = parse_address_key(p, "pid", &pid); |
807 | if (r < 0) | |
808 | return r; | |
809 | else if (r > 0) | |
810 | continue; | |
811 | ||
a7893c6b LP |
812 | skip_address_key(p); |
813 | } | |
814 | ||
ee502e0c | 815 | if (!machine == !pid) |
a7893c6b LP |
816 | return -EINVAL; |
817 | ||
ee502e0c LP |
818 | if (machine) { |
819 | if (!machine_name_is_valid(machine)) | |
820 | return -EINVAL; | |
b6741478 | 821 | |
ee502e0c LP |
822 | free(b->machine); |
823 | b->machine = machine; | |
824 | machine = NULL; | |
825 | } else { | |
826 | free(b->machine); | |
827 | b->machine = NULL; | |
828 | } | |
829 | ||
830 | if (pid) { | |
831 | r = parse_pid(pid, &b->nspid); | |
832 | if (r < 0) | |
833 | return r; | |
834 | } else | |
835 | b->nspid = 0; | |
a7893c6b LP |
836 | |
837 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
838 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
839 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
840 | |
841 | return 0; | |
842 | } | |
843 | ||
bc9fd78c | 844 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 845 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
846 | int r; |
847 | ||
848 | assert(b); | |
849 | assert(p); | |
850 | assert(*p); | |
851 | assert(guid); | |
852 | ||
853 | while (**p != 0 && **p != ';') { | |
854 | r = parse_address_key(p, "guid", guid); | |
855 | if (r < 0) | |
856 | return r; | |
857 | else if (r > 0) | |
858 | continue; | |
859 | ||
860 | r = parse_address_key(p, "machine", &machine); | |
861 | if (r < 0) | |
862 | return r; | |
863 | else if (r > 0) | |
864 | continue; | |
865 | ||
ee502e0c LP |
866 | r = parse_address_key(p, "pid", &pid); |
867 | if (r < 0) | |
868 | return r; | |
869 | else if (r > 0) | |
870 | continue; | |
871 | ||
bc9fd78c LP |
872 | skip_address_key(p); |
873 | } | |
874 | ||
ee502e0c | 875 | if (!machine == !pid) |
bc9fd78c LP |
876 | return -EINVAL; |
877 | ||
ee502e0c LP |
878 | if (machine) { |
879 | if (!machine_name_is_valid(machine)) | |
880 | return -EINVAL; | |
bc9fd78c | 881 | |
ee502e0c LP |
882 | free(b->machine); |
883 | b->machine = machine; | |
884 | machine = NULL; | |
885 | } else { | |
886 | free(b->machine); | |
887 | b->machine = NULL; | |
888 | } | |
889 | ||
890 | if (pid) { | |
891 | r = parse_pid(pid, &b->nspid); | |
892 | if (r < 0) | |
893 | return r; | |
894 | } else | |
895 | b->nspid = 0; | |
bc9fd78c LP |
896 | |
897 | free(b->kernel); | |
63cc4c31 | 898 | b->kernel = strdup("/sys/fs/kdbus/0-system/bus"); |
bc9fd78c LP |
899 | if (!b->kernel) |
900 | return -ENOMEM; | |
901 | ||
902 | return 0; | |
903 | } | |
904 | ||
2fd9ae2e LP |
905 | static void bus_reset_parsed_address(sd_bus *b) { |
906 | assert(b); | |
907 | ||
908 | zero(b->sockaddr); | |
909 | b->sockaddr_size = 0; | |
910 | strv_free(b->exec_argv); | |
911 | free(b->exec_path); | |
912 | b->exec_path = NULL; | |
913 | b->exec_argv = NULL; | |
98178d39 | 914 | b->server_id = SD_ID128_NULL; |
6629161f LP |
915 | free(b->kernel); |
916 | b->kernel = NULL; | |
a7893c6b LP |
917 | free(b->machine); |
918 | b->machine = NULL; | |
ee502e0c | 919 | b->nspid = 0; |
2fd9ae2e LP |
920 | } |
921 | ||
922 | static int bus_parse_next_address(sd_bus *b) { | |
923 | _cleanup_free_ char *guid = NULL; | |
924 | const char *a; | |
925 | int r; | |
926 | ||
927 | assert(b); | |
928 | ||
929 | if (!b->address) | |
930 | return 0; | |
931 | if (b->address[b->address_index] == 0) | |
932 | return 0; | |
933 | ||
934 | bus_reset_parsed_address(b); | |
935 | ||
936 | a = b->address + b->address_index; | |
de1c301e | 937 | |
2fd9ae2e | 938 | while (*a != 0) { |
de1c301e | 939 | |
2fd9ae2e LP |
940 | if (*a == ';') { |
941 | a++; | |
942 | continue; | |
de1c301e LP |
943 | } |
944 | ||
2fd9ae2e LP |
945 | if (startswith(a, "unix:")) { |
946 | a += 5; | |
de1c301e | 947 | |
2fd9ae2e | 948 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
949 | if (r < 0) |
950 | return r; | |
2fd9ae2e | 951 | break; |
de1c301e | 952 | |
2fd9ae2e | 953 | } else if (startswith(a, "tcp:")) { |
de1c301e | 954 | |
2fd9ae2e LP |
955 | a += 4; |
956 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
957 | if (r < 0) |
958 | return r; | |
de1c301e | 959 | |
2fd9ae2e LP |
960 | break; |
961 | ||
962 | } else if (startswith(a, "unixexec:")) { | |
963 | ||
964 | a += 9; | |
965 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
966 | if (r < 0) |
967 | return r; | |
de1c301e | 968 | |
2fd9ae2e | 969 | break; |
de1c301e | 970 | |
6629161f LP |
971 | } else if (startswith(a, "kernel:")) { |
972 | ||
973 | a += 7; | |
974 | r = parse_kernel_address(b, &a, &guid); | |
975 | if (r < 0) | |
976 | return r; | |
977 | ||
a7893c6b | 978 | break; |
de33fc62 | 979 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 980 | |
146d4773 | 981 | a += 15; |
bc9fd78c LP |
982 | r = parse_container_unix_address(b, &a, &guid); |
983 | if (r < 0) | |
984 | return r; | |
985 | ||
986 | break; | |
de33fc62 | 987 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 988 | |
146d4773 | 989 | a += 17; |
bc9fd78c | 990 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
991 | if (r < 0) |
992 | return r; | |
993 | ||
6629161f | 994 | break; |
de1c301e LP |
995 | } |
996 | ||
2fd9ae2e LP |
997 | a = strchr(a, ';'); |
998 | if (!a) | |
999 | return 0; | |
de1c301e LP |
1000 | } |
1001 | ||
1002 | if (guid) { | |
98178d39 | 1003 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
1004 | if (r < 0) |
1005 | return r; | |
1006 | } | |
1007 | ||
2fd9ae2e | 1008 | b->address_index = a - b->address; |
de1c301e LP |
1009 | return 1; |
1010 | } | |
1011 | ||
a7e3212d | 1012 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
1013 | int r; |
1014 | ||
1015 | assert(b); | |
1016 | ||
1017 | for (;;) { | |
1e05d493 | 1018 | bool skipped = false; |
2fd9ae2e | 1019 | |
1e05d493 | 1020 | bus_close_fds(b); |
a7e3212d | 1021 | |
1e05d493 | 1022 | if (b->exec_path) |
a7893c6b | 1023 | r = bus_socket_exec(b); |
ee502e0c | 1024 | else if ((b->nspid > 0 || b->machine) && b->kernel) |
bc9fd78c | 1025 | r = bus_container_connect_kernel(b); |
ee502e0c | 1026 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
bc9fd78c | 1027 | r = bus_container_connect_socket(b); |
1e05d493 | 1028 | else if (b->kernel) |
a7893c6b | 1029 | r = bus_kernel_connect(b); |
1e05d493 | 1030 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 1031 | r = bus_socket_connect(b); |
1e05d493 LP |
1032 | else |
1033 | skipped = true; | |
1034 | ||
1035 | if (!skipped) { | |
1036 | if (r >= 0) { | |
1037 | r = attach_io_events(b); | |
1038 | if (r >= 0) | |
1039 | return r; | |
1040 | } | |
6629161f | 1041 | |
2fd9ae2e LP |
1042 | b->last_connect_error = -r; |
1043 | } | |
1044 | ||
1045 | r = bus_parse_next_address(b); | |
1046 | if (r < 0) | |
1047 | return r; | |
1048 | if (r == 0) | |
1049 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1050 | } |
1051 | } | |
1052 | ||
a7e3212d LP |
1053 | int bus_next_address(sd_bus *b) { |
1054 | assert(b); | |
1055 | ||
1056 | bus_reset_parsed_address(b); | |
1057 | return bus_start_address(b); | |
1058 | } | |
1059 | ||
021a1e78 | 1060 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1061 | struct stat st; |
021a1e78 LP |
1062 | int r; |
1063 | ||
1064 | assert(b); | |
e82c9509 LP |
1065 | assert(b->input_fd >= 0); |
1066 | assert(b->output_fd >= 0); | |
021a1e78 | 1067 | |
e82c9509 | 1068 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1069 | if (r < 0) |
1070 | return r; | |
1071 | ||
e82c9509 | 1072 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1073 | if (r < 0) |
1074 | return r; | |
1075 | ||
e82c9509 LP |
1076 | if (b->input_fd != b->output_fd) { |
1077 | r = fd_nonblock(b->output_fd, true); | |
1078 | if (r < 0) | |
1079 | return r; | |
1080 | ||
1081 | r = fd_cloexec(b->output_fd, true); | |
1082 | if (r < 0) | |
1083 | return r; | |
1084 | } | |
1085 | ||
6629161f LP |
1086 | if (fstat(b->input_fd, &st) < 0) |
1087 | return -errno; | |
1088 | ||
1089 | if (S_ISCHR(b->input_fd)) | |
1090 | return bus_kernel_take_fd(b); | |
1091 | else | |
1092 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1093 | } |
1094 | ||
d9f644e2 | 1095 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1096 | int r; |
1097 | ||
d6888822 LP |
1098 | assert_return(bus, -EINVAL); |
1099 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1100 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1101 | |
1102 | bus->state = BUS_OPENING; | |
1103 | ||
2181a7f5 LP |
1104 | if (bus->is_server && bus->bus_client) |
1105 | return -EINVAL; | |
1106 | ||
e82c9509 | 1107 | if (bus->input_fd >= 0) |
021a1e78 | 1108 | r = bus_start_fd(bus); |
a7893c6b | 1109 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1110 | r = bus_start_address(bus); |
021a1e78 LP |
1111 | else |
1112 | return -EINVAL; | |
1113 | ||
db9bb83f LP |
1114 | if (r < 0) { |
1115 | sd_bus_close(bus); | |
021a1e78 | 1116 | return r; |
db9bb83f | 1117 | } |
021a1e78 LP |
1118 | |
1119 | return bus_send_hello(bus); | |
1120 | } | |
1121 | ||
af08d2f9 LP |
1122 | _public_ int sd_bus_open(sd_bus **ret) { |
1123 | const char *e; | |
1124 | sd_bus *b; | |
1125 | int r; | |
1126 | ||
1127 | assert_return(ret, -EINVAL); | |
1128 | ||
1129 | /* Let's connect to the starter bus if it is set, and | |
1130 | * otherwise to the bus that is appropropriate for the scope | |
1131 | * we are running in */ | |
1132 | ||
1133 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1134 | if (e) { | |
1135 | if (streq(e, "system")) | |
1136 | return sd_bus_open_system(ret); | |
09365592 | 1137 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1138 | return sd_bus_open_user(ret); |
1139 | } | |
1140 | ||
1141 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1142 | if (!e) { | |
1143 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1144 | return sd_bus_open_user(ret); | |
1145 | else | |
1146 | return sd_bus_open_system(ret); | |
1147 | } | |
1148 | ||
1149 | r = sd_bus_new(&b); | |
1150 | if (r < 0) | |
1151 | return r; | |
1152 | ||
1153 | r = sd_bus_set_address(b, e); | |
1154 | if (r < 0) | |
1155 | goto fail; | |
1156 | ||
1157 | b->bus_client = true; | |
1158 | ||
1159 | /* We don't know whether the bus is trusted or not, so better | |
1160 | * be safe, and authenticate everything */ | |
1161 | b->trusted = false; | |
cf226cfc LP |
1162 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1163 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1164 | |
1165 | r = sd_bus_start(b); | |
1166 | if (r < 0) | |
1167 | goto fail; | |
1168 | ||
1169 | *ret = b; | |
1170 | return 0; | |
1171 | ||
1172 | fail: | |
1173 | bus_free(b); | |
1174 | return r; | |
1175 | } | |
1176 | ||
09365592 | 1177 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1178 | const char *e; |
09365592 LP |
1179 | assert(b); |
1180 | ||
1181 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1182 | if (e) | |
1183 | return sd_bus_set_address(b, e); | |
1184 | ||
e3afaf6b | 1185 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1186 | } |
1187 | ||
1188 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1189 | sd_bus *b; |
1190 | int r; | |
1191 | ||
d6888822 | 1192 | assert_return(ret, -EINVAL); |
de1c301e | 1193 | |
021a1e78 LP |
1194 | r = sd_bus_new(&b); |
1195 | if (r < 0) | |
1196 | return r; | |
1197 | ||
09365592 | 1198 | r = bus_set_address_system(b); |
e3dd987c LP |
1199 | if (r < 0) |
1200 | goto fail; | |
de1c301e | 1201 | |
94bbf1ba | 1202 | b->bus_client = true; |
5972fe95 | 1203 | b->is_system = true; |
021a1e78 | 1204 | |
adacb957 LP |
1205 | /* Let's do per-method access control on the system bus. We |
1206 | * need the caller's UID and capability set for that. */ | |
1207 | b->trusted = false; | |
1208 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1209 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1210 | |
021a1e78 LP |
1211 | r = sd_bus_start(b); |
1212 | if (r < 0) | |
1213 | goto fail; | |
de1c301e LP |
1214 | |
1215 | *ret = b; | |
1216 | return 0; | |
021a1e78 LP |
1217 | |
1218 | fail: | |
1219 | bus_free(b); | |
1220 | return r; | |
de1c301e LP |
1221 | } |
1222 | ||
09365592 | 1223 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1224 | const char *e; |
de1c301e | 1225 | |
09365592 | 1226 | assert(b); |
021a1e78 | 1227 | |
6c03089c | 1228 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1229 | if (e) |
1230 | return sd_bus_set_address(b, e); | |
1231 | ||
1232 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
de1c301e | 1233 | if (e) { |
09365592 | 1234 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1235 | |
09365592 LP |
1236 | ee = bus_address_escape(e); |
1237 | if (!ee) | |
1238 | return -ENOMEM; | |
e3dd987c | 1239 | |
626851be | 1240 | #ifdef ENABLE_KDBUS |
e3afaf6b | 1241 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee); |
626851be | 1242 | #else |
e3afaf6b | 1243 | (void) asprintf(&b->address, UNIX_USER_BUS_ADDRESS_FMT, ee); |
626851be | 1244 | #endif |
09365592 | 1245 | } else { |
626851be | 1246 | #ifdef ENABLE_KDBUS |
e3afaf6b | 1247 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()); |
626851be | 1248 | #else |
09365592 | 1249 | return -ECONNREFUSED; |
626851be | 1250 | #endif |
de1c301e LP |
1251 | } |
1252 | ||
09365592 LP |
1253 | if (!b->address) |
1254 | return -ENOMEM; | |
1255 | ||
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1260 | sd_bus *b; | |
1261 | int r; | |
1262 | ||
1263 | assert_return(ret, -EINVAL); | |
1264 | ||
1265 | r = sd_bus_new(&b); | |
1266 | if (r < 0) | |
1267 | return r; | |
1268 | ||
1269 | r = bus_set_address_user(b); | |
1270 | if (r < 0) | |
1271 | return r; | |
1272 | ||
94bbf1ba | 1273 | b->bus_client = true; |
5972fe95 | 1274 | b->is_user = true; |
de1c301e | 1275 | |
adacb957 LP |
1276 | /* We don't do any per-method access control on the user |
1277 | * bus. */ | |
1278 | b->trusted = true; | |
1279 | ||
021a1e78 | 1280 | r = sd_bus_start(b); |
2571ead1 LP |
1281 | if (r < 0) |
1282 | goto fail; | |
de1c301e LP |
1283 | |
1284 | *ret = b; | |
1285 | return 0; | |
2571ead1 LP |
1286 | |
1287 | fail: | |
021a1e78 | 1288 | bus_free(b); |
2571ead1 | 1289 | return r; |
de1c301e LP |
1290 | } |
1291 | ||
09365592 | 1292 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1293 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1294 | char *m = NULL, *c = NULL; |
0f8bd8de | 1295 | |
09365592 LP |
1296 | assert(b); |
1297 | assert(host); | |
0f8bd8de | 1298 | |
7f0d207d LP |
1299 | /* Let's see if we shall enter some container */ |
1300 | m = strchr(host, ':'); | |
1301 | if (m) { | |
1302 | m++; | |
1303 | ||
1304 | /* Let's make sure this is not a port of some kind, | |
1305 | * and is a valid machine name. */ | |
1306 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1307 | char *t; | |
1308 | ||
1309 | /* Cut out the host part */ | |
1310 | t = strndupa(host, m - host - 1); | |
1311 | e = bus_address_escape(t); | |
1312 | if (!e) | |
1313 | return -ENOMEM; | |
1314 | ||
63c372cb | 1315 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1316 | } |
1317 | } | |
1318 | ||
1319 | if (!e) { | |
1320 | e = bus_address_escape(host); | |
1321 | if (!e) | |
1322 | return -ENOMEM; | |
1323 | } | |
0f8bd8de | 1324 | |
7f0d207d | 1325 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1326 | if (!b->address) |
0f8bd8de | 1327 | return -ENOMEM; |
a7893c6b | 1328 | |
09365592 LP |
1329 | return 0; |
1330 | } | |
1331 | ||
1332 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1333 | sd_bus *bus; | |
1334 | int r; | |
1335 | ||
1336 | assert_return(host, -EINVAL); | |
1337 | assert_return(ret, -EINVAL); | |
1338 | ||
a7893c6b | 1339 | r = sd_bus_new(&bus); |
09365592 | 1340 | if (r < 0) |
a7893c6b | 1341 | return r; |
a7893c6b | 1342 | |
09365592 LP |
1343 | r = bus_set_address_system_remote(bus, host); |
1344 | if (r < 0) | |
1345 | goto fail; | |
1346 | ||
a7893c6b | 1347 | bus->bus_client = true; |
09365592 | 1348 | bus->trusted = false; |
3acc1daf | 1349 | bus->is_system = true; |
a7893c6b LP |
1350 | |
1351 | r = sd_bus_start(bus); | |
09365592 LP |
1352 | if (r < 0) |
1353 | goto fail; | |
a7893c6b LP |
1354 | |
1355 | *ret = bus; | |
1356 | return 0; | |
09365592 LP |
1357 | |
1358 | fail: | |
1359 | bus_free(bus); | |
1360 | return r; | |
a7893c6b LP |
1361 | } |
1362 | ||
de33fc62 | 1363 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1364 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1365 | |
09365592 LP |
1366 | assert(b); |
1367 | assert(machine); | |
a7893c6b LP |
1368 | |
1369 | e = bus_address_escape(machine); | |
1370 | if (!e) | |
1371 | return -ENOMEM; | |
1372 | ||
9e554864 | 1373 | #ifdef ENABLE_KDBUS |
de33fc62 | 1374 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
9e554864 | 1375 | #else |
de33fc62 | 1376 | b->address = strjoin("x-machine-unix:machine=", e, NULL); |
9e554864 | 1377 | #endif |
09365592 | 1378 | if (!b->address) |
a7893c6b | 1379 | return -ENOMEM; |
0f8bd8de | 1380 | |
09365592 LP |
1381 | return 0; |
1382 | } | |
1383 | ||
de33fc62 | 1384 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1385 | sd_bus *bus; |
1386 | int r; | |
1387 | ||
1388 | assert_return(machine, -EINVAL); | |
1389 | assert_return(ret, -EINVAL); | |
affcf189 | 1390 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1391 | |
0f8bd8de | 1392 | r = sd_bus_new(&bus); |
09365592 | 1393 | if (r < 0) |
0f8bd8de | 1394 | return r; |
0f8bd8de | 1395 | |
de33fc62 | 1396 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1397 | if (r < 0) |
1398 | goto fail; | |
1399 | ||
0f8bd8de | 1400 | bus->bus_client = true; |
09365592 | 1401 | bus->trusted = false; |
3acc1daf | 1402 | bus->is_system = true; |
0f8bd8de LP |
1403 | |
1404 | r = sd_bus_start(bus); | |
09365592 LP |
1405 | if (r < 0) |
1406 | goto fail; | |
0f8bd8de LP |
1407 | |
1408 | *ret = bus; | |
1409 | return 0; | |
09365592 LP |
1410 | |
1411 | fail: | |
1412 | bus_free(bus); | |
1413 | return r; | |
0f8bd8de LP |
1414 | } |
1415 | ||
d9f644e2 | 1416 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1417 | |
de1c301e LP |
1418 | if (!bus) |
1419 | return; | |
d5a2b9a6 LP |
1420 | if (bus->state == BUS_CLOSED) |
1421 | return; | |
1422 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1423 | return; |
1424 | ||
1425 | bus->state = BUS_CLOSED; | |
e82c9509 | 1426 | |
40ca29a1 LP |
1427 | sd_bus_detach_event(bus); |
1428 | ||
0e586eae LP |
1429 | /* Drop all queued messages so that they drop references to |
1430 | * the bus object and the bus may be freed */ | |
1431 | bus_reset_queues(bus); | |
1432 | ||
f54514f3 LP |
1433 | if (!bus->is_kernel) |
1434 | bus_close_fds(bus); | |
1435 | ||
1436 | /* We'll leave the fd open in case this is a kernel bus, since | |
1437 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1438 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1439 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1440 | } |
1441 | ||
718db961 LP |
1442 | static void bus_enter_closing(sd_bus *bus) { |
1443 | assert(bus); | |
1444 | ||
1445 | if (bus->state != BUS_OPENING && | |
1446 | bus->state != BUS_AUTHENTICATING && | |
1447 | bus->state != BUS_HELLO && | |
1448 | bus->state != BUS_RUNNING) | |
1449 | return; | |
1450 | ||
1451 | bus->state = BUS_CLOSING; | |
1452 | } | |
1453 | ||
d9f644e2 | 1454 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1455 | assert_return(bus, NULL); |
de1c301e | 1456 | |
e4ee6e5c | 1457 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1458 | |
de1c301e LP |
1459 | return bus; |
1460 | } | |
1461 | ||
d9f644e2 | 1462 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1463 | unsigned i; |
5b1bc83f LP |
1464 | |
1465 | if (!bus) | |
1466 | return NULL; | |
de1c301e | 1467 | |
f389bf15 LP |
1468 | i = REFCNT_DEC(bus->n_ref); |
1469 | if (i > 0) | |
1470 | return NULL; | |
1471 | ||
1472 | bus_free(bus); | |
de1c301e LP |
1473 | return NULL; |
1474 | } | |
1475 | ||
d9f644e2 | 1476 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1477 | |
1478 | assert_return(bus, -EINVAL); | |
1479 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1480 | |
f54514f3 | 1481 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1482 | } |
1483 | ||
d9f644e2 | 1484 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1485 | int r; |
1486 | ||
d6888822 LP |
1487 | assert_return(bus, -EINVAL); |
1488 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1489 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1490 | |
09365592 LP |
1491 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1492 | return 0; | |
1493 | ||
d728d708 | 1494 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1495 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1496 | return 0; |
1497 | ||
20902f3e | 1498 | r = bus_ensure_running(bus); |
d728d708 LP |
1499 | if (r < 0) |
1500 | return r; | |
de1c301e | 1501 | |
d728d708 LP |
1502 | return bus->can_fds; |
1503 | } | |
1504 | ||
1505 | return bus_type_is_valid(type); | |
de1c301e LP |
1506 | } |
1507 | ||
5c302692 | 1508 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1509 | int r; |
de1c301e | 1510 | |
d6888822 | 1511 | assert_return(bus, -EINVAL); |
f7fce345 | 1512 | assert_return(id, -EINVAL); |
d6888822 | 1513 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1514 | |
20902f3e | 1515 | r = bus_ensure_running(bus); |
d728d708 LP |
1516 | if (r < 0) |
1517 | return r; | |
de1c301e | 1518 | |
f7fce345 | 1519 | *id = bus->server_id; |
d728d708 | 1520 | return 0; |
de1c301e LP |
1521 | } |
1522 | ||
3df7a7e6 | 1523 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1524 | assert(b); |
de1c301e LP |
1525 | assert(m); |
1526 | ||
aea93deb LP |
1527 | if (m->sealed) { |
1528 | /* If we copy the same message to multiple | |
693eb9a2 | 1529 | * destinations, avoid using the same cookie |
aea93deb | 1530 | * numbers. */ |
693eb9a2 | 1531 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1532 | return 0; |
aea93deb | 1533 | } |
de1c301e | 1534 | |
3df7a7e6 LP |
1535 | if (timeout == 0) |
1536 | timeout = BUS_DEFAULT_TIMEOUT; | |
1537 | ||
693eb9a2 | 1538 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1539 | } |
1540 | ||
e1c433c6 | 1541 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1542 | bool remarshal = false; |
1543 | ||
e1c433c6 LP |
1544 | assert(b); |
1545 | ||
908b8a42 DH |
1546 | /* wrong packet version */ |
1547 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1548 | remarshal = true; | |
1549 | ||
1550 | /* wrong packet endianness */ | |
1551 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1552 | remarshal = true; | |
1553 | ||
1554 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1555 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1556 | * force remarshaling of the message. Technically, we could just | |
1557 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1558 | * the message refer to m->kdbus already. This should be fixed! */ | |
1559 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1560 | remarshal = true; | |
e1c433c6 | 1561 | |
908b8a42 | 1562 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1563 | } |
1564 | ||
7adc46fc LP |
1565 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1566 | assert(b); | |
1567 | assert(m); | |
1568 | ||
52cd5877 LP |
1569 | /* Fake some timestamps, if they were requested, and not |
1570 | * already initialized */ | |
1571 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1572 | if (m->realtime <= 0) | |
1573 | m->realtime = now(CLOCK_REALTIME); | |
1574 | ||
1575 | if (m->monotonic <= 0) | |
1576 | m->monotonic = now(CLOCK_MONOTONIC); | |
1577 | } | |
1578 | ||
7adc46fc LP |
1579 | /* The bus specification says the serial number cannot be 0, |
1580 | * hence let's fill something in for synthetic messages. Since | |
1581 | * synthetic messages might have a fake sender and we don't | |
1582 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1583 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1584 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1585 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1586 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1587 | } |
1588 | ||
069f5e61 | 1589 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1590 | int r; |
1591 | ||
718db961 | 1592 | assert(bus); |
2e3db52d | 1593 | assert(m); |
718db961 LP |
1594 | |
1595 | if (bus->is_kernel) | |
069f5e61 | 1596 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1597 | else |
2e3db52d LP |
1598 | r = bus_socket_write_message(bus, m, idx); |
1599 | ||
1600 | if (r <= 0) | |
1601 | return r; | |
1602 | ||
90911bb6 | 1603 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1604 | log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", |
2e3db52d LP |
1605 | bus_message_type_to_string(m->header->type), |
1606 | strna(sd_bus_message_get_sender(m)), | |
1607 | strna(sd_bus_message_get_destination(m)), | |
1608 | strna(sd_bus_message_get_path(m)), | |
1609 | strna(sd_bus_message_get_interface(m)), | |
1610 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1611 | BUS_MESSAGE_COOKIE(m), |
1612 | m->reply_cookie, | |
2e3db52d LP |
1613 | strna(m->error.message)); |
1614 | ||
1615 | return r; | |
718db961 LP |
1616 | } |
1617 | ||
de1c301e | 1618 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1619 | int r, ret = 0; |
de1c301e LP |
1620 | |
1621 | assert(bus); | |
89ffcd2a | 1622 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1623 | |
de1c301e LP |
1624 | while (bus->wqueue_size > 0) { |
1625 | ||
069f5e61 | 1626 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1627 | if (r < 0) |
de1c301e | 1628 | return r; |
718db961 | 1629 | else if (r == 0) |
e3017af9 LP |
1630 | /* Didn't do anything this time */ |
1631 | return ret; | |
6629161f | 1632 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1633 | /* Fully written. Let's drop the entry from |
1634 | * the queue. | |
1635 | * | |
1636 | * This isn't particularly optimized, but | |
1637 | * well, this is supposed to be our worst-case | |
1638 | * buffer only, and the socket buffer is | |
1639 | * supposed to be our primary buffer, and if | |
1640 | * it got full, then all bets are off | |
1641 | * anyway. */ | |
1642 | ||
de1c301e | 1643 | bus->wqueue_size --; |
c4e6e242 | 1644 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1645 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1646 | bus->windex = 0; | |
1647 | ||
e3017af9 | 1648 | ret = 1; |
de1c301e LP |
1649 | } |
1650 | } | |
1651 | ||
e3017af9 | 1652 | return ret; |
de1c301e LP |
1653 | } |
1654 | ||
766c5809 | 1655 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1656 | assert(bus); |
1657 | ||
1658 | if (bus->is_kernel) | |
766c5809 | 1659 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1660 | else |
1661 | return bus_socket_read_message(bus); | |
1662 | } | |
1663 | ||
7adc46fc | 1664 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1665 | assert(bus); |
7d22c717 | 1666 | |
821e0756 | 1667 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1668 | return -ENOBUFS; |
1669 | ||
821e0756 | 1670 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1671 | return -ENOMEM; |
1672 | ||
7d22c717 LP |
1673 | return 0; |
1674 | } | |
1675 | ||
766c5809 | 1676 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1677 | int r, ret = 0; |
de1c301e LP |
1678 | |
1679 | assert(bus); | |
1680 | assert(m); | |
89ffcd2a | 1681 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1682 | |
766c5809 LP |
1683 | /* Note that the priority logic is only available on kdbus, |
1684 | * where the rqueue is unused. We check the rqueue here | |
1685 | * anyway, because it's simple... */ | |
1686 | ||
7d22c717 LP |
1687 | for (;;) { |
1688 | if (bus->rqueue_size > 0) { | |
1689 | /* Dispatch a queued message */ | |
de1c301e | 1690 | |
7d22c717 LP |
1691 | *m = bus->rqueue[0]; |
1692 | bus->rqueue_size --; | |
1693 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1694 | return 1; | |
1695 | } | |
de1c301e | 1696 | |
7d22c717 | 1697 | /* Try to read a new message */ |
766c5809 | 1698 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1699 | if (r < 0) |
e3017af9 | 1700 | return r; |
e3017af9 LP |
1701 | if (r == 0) |
1702 | return ret; | |
de1c301e | 1703 | |
2e8d788c | 1704 | ret = 1; |
7d22c717 | 1705 | } |
de1c301e LP |
1706 | } |
1707 | ||
069f5e61 | 1708 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1709 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1710 | int r; |
1711 | ||
d6888822 | 1712 | assert_return(m, -EINVAL); |
9030ca46 LP |
1713 | |
1714 | if (!bus) | |
1715 | bus = m->bus; | |
1716 | ||
d6888822 | 1717 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1718 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1719 | |
a3d59cd1 LP |
1720 | if (!BUS_IS_OPEN(bus->state)) |
1721 | return -ENOTCONN; | |
1722 | ||
021a1e78 LP |
1723 | if (m->n_fds > 0) { |
1724 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1725 | if (r < 0) | |
1726 | return r; | |
1727 | if (r == 0) | |
15411c0c | 1728 | return -EOPNOTSUPP; |
021a1e78 | 1729 | } |
de1c301e | 1730 | |
693eb9a2 | 1731 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1732 | * is expected */ |
693eb9a2 | 1733 | if (!cookie && !m->sealed) |
0461f8cd | 1734 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1735 | |
3df7a7e6 | 1736 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1737 | if (r < 0) |
1738 | return r; | |
1739 | ||
441d56a1 | 1740 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1741 | * message and place a replacement in m */ |
1742 | r = bus_remarshal_message(bus, &m); | |
1743 | if (r < 0) | |
1744 | return r; | |
1745 | ||
5407f2de LP |
1746 | /* If this is a reply and no reply was requested, then let's |
1747 | * suppress this, if we can */ | |
997eadb5 LP |
1748 | if (m->dont_send) |
1749 | goto finish; | |
5407f2de | 1750 | |
89ffcd2a | 1751 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1752 | size_t idx = 0; |
1753 | ||
069f5e61 | 1754 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1755 | if (r < 0) { |
441d56a1 | 1756 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1757 | bus_enter_closing(bus); |
441d56a1 LP |
1758 | return -ECONNRESET; |
1759 | } | |
32f46480 | 1760 | |
de1c301e | 1761 | return r; |
997eadb5 LP |
1762 | } |
1763 | ||
1764 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1765 | /* Wasn't fully written. So let's remember how |
1766 | * much was written. Note that the first entry | |
1767 | * of the wqueue array is always allocated so | |
1768 | * that we always can remember how much was | |
1769 | * written. */ | |
1770 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1771 | bus->wqueue_size = 1; | |
1772 | bus->windex = idx; | |
1773 | } | |
997eadb5 | 1774 | |
de1c301e | 1775 | } else { |
de1c301e LP |
1776 | /* Just append it to the queue. */ |
1777 | ||
25220239 | 1778 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1779 | return -ENOBUFS; |
1780 | ||
821e0756 | 1781 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1782 | return -ENOMEM; |
1783 | ||
821e0756 | 1784 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1785 | } |
1786 | ||
997eadb5 | 1787 | finish: |
693eb9a2 LP |
1788 | if (cookie) |
1789 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1790 | |
7a37d625 | 1791 | return 1; |
de1c301e LP |
1792 | } |
1793 | ||
069f5e61 LP |
1794 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1795 | return bus_send_internal(bus, m, cookie, false); | |
1796 | } | |
1797 | ||
693eb9a2 | 1798 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1799 | int r; |
1800 | ||
911121a7 | 1801 | assert_return(m, -EINVAL); |
9030ca46 LP |
1802 | |
1803 | if (!bus) | |
1804 | bus = m->bus; | |
1805 | ||
911121a7 LP |
1806 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1807 | ||
a3d59cd1 LP |
1808 | if (!BUS_IS_OPEN(bus->state)) |
1809 | return -ENOTCONN; | |
1810 | ||
911121a7 LP |
1811 | if (!streq_ptr(m->destination, destination)) { |
1812 | ||
1813 | if (!destination) | |
1814 | return -EEXIST; | |
1815 | ||
1816 | r = sd_bus_message_set_destination(m, destination); | |
1817 | if (r < 0) | |
1818 | return r; | |
1819 | } | |
1820 | ||
693eb9a2 | 1821 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1822 | } |
1823 | ||
de1c301e LP |
1824 | static usec_t calc_elapse(uint64_t usec) { |
1825 | if (usec == (uint64_t) -1) | |
1826 | return 0; | |
1827 | ||
de1c301e LP |
1828 | return now(CLOCK_MONOTONIC) + usec; |
1829 | } | |
1830 | ||
e3017af9 LP |
1831 | static int timeout_compare(const void *a, const void *b) { |
1832 | const struct reply_callback *x = a, *y = b; | |
1833 | ||
1834 | if (x->timeout != 0 && y->timeout == 0) | |
1835 | return -1; | |
1836 | ||
1837 | if (x->timeout == 0 && y->timeout != 0) | |
1838 | return 1; | |
1839 | ||
1840 | if (x->timeout < y->timeout) | |
1841 | return -1; | |
1842 | ||
1843 | if (x->timeout > y->timeout) | |
1844 | return 1; | |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | ||
c49b30a2 | 1849 | _public_ int sd_bus_call_async( |
de1c301e | 1850 | sd_bus *bus, |
19befb2d | 1851 | sd_bus_slot **slot, |
e1c433c6 | 1852 | sd_bus_message *_m, |
52f3ba91 | 1853 | sd_bus_message_handler_t callback, |
de1c301e | 1854 | void *userdata, |
19befb2d | 1855 | uint64_t usec) { |
de1c301e | 1856 | |
e1c433c6 | 1857 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1858 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1859 | int r; |
1860 | ||
d6888822 | 1861 | assert_return(m, -EINVAL); |
40ca29a1 | 1862 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1863 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1864 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1865 | |
1866 | if (!bus) | |
1867 | bus = m->bus; | |
1868 | ||
d6888822 | 1869 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1870 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1871 | |
a3d59cd1 LP |
1872 | if (!BUS_IS_OPEN(bus->state)) |
1873 | return -ENOTCONN; | |
1874 | ||
c9fe4af7 | 1875 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1876 | if (r < 0) |
1877 | return r; | |
de1c301e | 1878 | |
3df7a7e6 LP |
1879 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1880 | if (r < 0) | |
1881 | return r; | |
e3017af9 | 1882 | |
3df7a7e6 | 1883 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1884 | if (r < 0) |
1885 | return r; | |
1886 | ||
e1c433c6 LP |
1887 | r = bus_remarshal_message(bus, &m); |
1888 | if (r < 0) | |
1889 | return r; | |
1890 | ||
19befb2d LP |
1891 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1892 | if (!s) | |
de1c301e LP |
1893 | return -ENOMEM; |
1894 | ||
19befb2d | 1895 | s->reply_callback.callback = callback; |
de1c301e | 1896 | |
19befb2d | 1897 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1898 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1899 | if (r < 0) { |
19befb2d | 1900 | s->reply_callback.cookie = 0; |
de1c301e LP |
1901 | return r; |
1902 | } | |
1903 | ||
19befb2d LP |
1904 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1905 | if (s->reply_callback.timeout != 0) { | |
1906 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1907 | if (r < 0) { |
19befb2d | 1908 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1909 | return r; |
1910 | } | |
1911 | } | |
1912 | ||
19befb2d LP |
1913 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1914 | if (r < 0) | |
de1c301e | 1915 | return r; |
de1c301e | 1916 | |
19befb2d LP |
1917 | if (slot) |
1918 | *slot = s; | |
1919 | s = NULL; | |
e3017af9 | 1920 | |
19befb2d | 1921 | return r; |
de1c301e LP |
1922 | } |
1923 | ||
20902f3e | 1924 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1925 | int r; |
1926 | ||
1927 | assert(bus); | |
1928 | ||
718db961 | 1929 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1930 | return -ENOTCONN; |
d728d708 LP |
1931 | if (bus->state == BUS_RUNNING) |
1932 | return 1; | |
89ffcd2a LP |
1933 | |
1934 | for (;;) { | |
1935 | r = sd_bus_process(bus, NULL); | |
1936 | if (r < 0) | |
1937 | return r; | |
d728d708 LP |
1938 | if (bus->state == BUS_RUNNING) |
1939 | return 1; | |
e3017af9 LP |
1940 | if (r > 0) |
1941 | continue; | |
89ffcd2a LP |
1942 | |
1943 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1944 | if (r < 0) | |
1945 | return r; | |
1946 | } | |
1947 | } | |
1948 | ||
97f82db3 | 1949 | _public_ int sd_bus_call( |
de1c301e | 1950 | sd_bus *bus, |
97f82db3 | 1951 | sd_bus_message *_m, |
de1c301e LP |
1952 | uint64_t usec, |
1953 | sd_bus_error *error, | |
1954 | sd_bus_message **reply) { | |
1955 | ||
97f82db3 | 1956 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1957 | usec_t timeout; |
693eb9a2 | 1958 | uint64_t cookie; |
7d22c717 LP |
1959 | unsigned i; |
1960 | int r; | |
de1c301e | 1961 | |
97f82db3 KS |
1962 | assert_return(m, -EINVAL); |
1963 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
1964 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1965 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
9030ca46 LP |
1966 | |
1967 | if (!bus) | |
1968 | bus = m->bus; | |
1969 | ||
97f82db3 | 1970 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1971 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
97f82db3 | 1972 | |
a3d59cd1 LP |
1973 | if (!BUS_IS_OPEN(bus->state)) |
1974 | return -ENOTCONN; | |
1975 | ||
97f82db3 KS |
1976 | r = bus_ensure_running(bus); |
1977 | if (r < 0) | |
1978 | return r; | |
1979 | ||
a43b9ca3 | 1980 | i = bus->rqueue_size; |
97f82db3 KS |
1981 | |
1982 | r = bus_seal_message(bus, m, usec); | |
1983 | if (r < 0) | |
1984 | return r; | |
1985 | ||
1986 | r = bus_remarshal_message(bus, &m); | |
1987 | if (r < 0) | |
1988 | return r; | |
1989 | ||
069f5e61 | 1990 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e LP |
1991 | if (r < 0) |
1992 | return r; | |
1993 | ||
3df7a7e6 | 1994 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1995 | |
1996 | for (;;) { | |
1997 | usec_t left; | |
de1c301e | 1998 | |
7d22c717 LP |
1999 | while (i < bus->rqueue_size) { |
2000 | sd_bus_message *incoming = NULL; | |
2001 | ||
2002 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2003 | |
693eb9a2 | 2004 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2005 | /* Found a match! */ |
2006 | ||
7d22c717 LP |
2007 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2008 | bus->rqueue_size--; | |
f9f97ca6 | 2009 | log_debug_bus_message(incoming); |
7d22c717 | 2010 | |
40ca29a1 | 2011 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2012 | |
2ce97e2b LP |
2013 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2014 | if (reply) | |
2015 | *reply = incoming; | |
2016 | else | |
2017 | sd_bus_message_unref(incoming); | |
2018 | ||
2019 | return 1; | |
2020 | } | |
2021 | ||
2022 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
b7f247e0 | 2023 | |
a43b9ca3 | 2024 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 2025 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
2026 | else |
2027 | r = -EIO; | |
de1c301e LP |
2028 | |
2029 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 2030 | return r; |
a8a07f89 | 2031 | |
693eb9a2 | 2032 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2033 | bus->unique_name && |
2034 | incoming->sender && | |
2035 | streq(bus->unique_name, incoming->sender)) { | |
2036 | ||
7d22c717 LP |
2037 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2038 | bus->rqueue_size--; | |
2039 | ||
a8a07f89 LP |
2040 | /* Our own message? Somebody is trying |
2041 | * to send its own client a message, | |
2042 | * let's not dead-lock, let's fail | |
2043 | * immediately. */ | |
2044 | ||
2045 | sd_bus_message_unref(incoming); | |
2046 | return -ELOOP; | |
de1c301e LP |
2047 | } |
2048 | ||
de1c301e | 2049 | /* Try to read more, right-away */ |
7d22c717 | 2050 | i++; |
de1c301e | 2051 | } |
7d22c717 | 2052 | |
766c5809 | 2053 | r = bus_read_message(bus, false, 0); |
32f46480 | 2054 | if (r < 0) { |
441d56a1 | 2055 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2056 | bus_enter_closing(bus); |
441d56a1 LP |
2057 | return -ECONNRESET; |
2058 | } | |
32f46480 | 2059 | |
a43b9ca3 | 2060 | return r; |
32f46480 | 2061 | } |
7d22c717 | 2062 | if (r > 0) |
e3017af9 | 2063 | continue; |
de1c301e LP |
2064 | |
2065 | if (timeout > 0) { | |
2066 | usec_t n; | |
2067 | ||
2068 | n = now(CLOCK_MONOTONIC); | |
2069 | if (n >= timeout) | |
2070 | return -ETIMEDOUT; | |
2071 | ||
2072 | left = timeout - n; | |
2073 | } else | |
2074 | left = (uint64_t) -1; | |
2075 | ||
e3017af9 | 2076 | r = bus_poll(bus, true, left); |
de1c301e LP |
2077 | if (r < 0) |
2078 | return r; | |
f8e11cda LP |
2079 | if (r == 0) |
2080 | return -ETIMEDOUT; | |
de1c301e LP |
2081 | |
2082 | r = dispatch_wqueue(bus); | |
32f46480 | 2083 | if (r < 0) { |
441d56a1 | 2084 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2085 | bus_enter_closing(bus); |
441d56a1 LP |
2086 | return -ECONNRESET; |
2087 | } | |
32f46480 | 2088 | |
de1c301e | 2089 | return r; |
32f46480 | 2090 | } |
de1c301e LP |
2091 | } |
2092 | } | |
2093 | ||
d9f644e2 | 2094 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2095 | |
2096 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2097 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2098 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2099 | |
e82c9509 | 2100 | return bus->input_fd; |
de1c301e LP |
2101 | } |
2102 | ||
d9f644e2 | 2103 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2104 | int flags = 0; |
2105 | ||
d6888822 | 2106 | assert_return(bus, -EINVAL); |
d6888822 | 2107 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2108 | |
a3d59cd1 LP |
2109 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2110 | return -ENOTCONN; | |
2111 | ||
de1c301e LP |
2112 | if (bus->state == BUS_OPENING) |
2113 | flags |= POLLOUT; | |
89ffcd2a LP |
2114 | else if (bus->state == BUS_AUTHENTICATING) { |
2115 | ||
2181a7f5 | 2116 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2117 | flags |= POLLOUT; |
2118 | ||
2119 | flags |= POLLIN; | |
2120 | ||
2121 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2122 | if (bus->rqueue_size <= 0) |
2123 | flags |= POLLIN; | |
2124 | if (bus->wqueue_size > 0) | |
2125 | flags |= POLLOUT; | |
2126 | } | |
2127 | ||
2128 | return flags; | |
2129 | } | |
2130 | ||
d9f644e2 | 2131 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2132 | struct reply_callback *c; |
2133 | ||
d6888822 LP |
2134 | assert_return(bus, -EINVAL); |
2135 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2136 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2137 | |
a3d59cd1 LP |
2138 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2139 | return -ENOTCONN; | |
2140 | ||
8f8f05a9 LP |
2141 | if (bus->track_queue) { |
2142 | *timeout_usec = 0; | |
2143 | return 1; | |
2144 | } | |
2145 | ||
718db961 LP |
2146 | if (bus->state == BUS_CLOSING) { |
2147 | *timeout_usec = 0; | |
2148 | return 1; | |
2149 | } | |
2150 | ||
e3017af9 LP |
2151 | if (bus->state == BUS_AUTHENTICATING) { |
2152 | *timeout_usec = bus->auth_timeout; | |
2153 | return 1; | |
2154 | } | |
2155 | ||
adee69fa LP |
2156 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2157 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2158 | return 0; |
adee69fa | 2159 | } |
e3017af9 | 2160 | |
8efd6381 LP |
2161 | if (bus->rqueue_size > 0) { |
2162 | *timeout_usec = 0; | |
2163 | return 1; | |
2164 | } | |
2165 | ||
e3017af9 | 2166 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2167 | if (!c) { |
2168 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2169 | return 0; |
adee69fa | 2170 | } |
e3017af9 | 2171 | |
19befb2d LP |
2172 | if (c->timeout == 0) { |
2173 | *timeout_usec = (uint64_t) -1; | |
2174 | return 0; | |
2175 | } | |
2176 | ||
e3017af9 LP |
2177 | *timeout_usec = c->timeout; |
2178 | return 1; | |
2179 | } | |
2180 | ||
2181 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2182 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2183 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2184 | struct reply_callback *c; |
1b64f838 | 2185 | sd_bus_slot *slot; |
e3017af9 LP |
2186 | usec_t n; |
2187 | int r; | |
2188 | ||
2189 | assert(bus); | |
2190 | ||
2191 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2192 | if (!c) | |
2193 | return 0; | |
2194 | ||
2195 | n = now(CLOCK_MONOTONIC); | |
2196 | if (c->timeout > n) | |
2197 | return 0; | |
2198 | ||
eb01ba5d LP |
2199 | r = bus_message_new_synthetic_error( |
2200 | bus, | |
693eb9a2 | 2201 | c->cookie, |
14c24659 | 2202 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2203 | &m); |
2204 | if (r < 0) | |
2205 | return r; | |
2206 | ||
7adc46fc | 2207 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2208 | if (r < 0) |
2209 | return r; | |
2210 | ||
e3017af9 | 2211 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2212 | c->timeout = 0; |
2213 | ||
c9fe4af7 | 2214 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2215 | c->cookie = 0; |
2216 | ||
1b64f838 | 2217 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2218 | |
718db961 LP |
2219 | bus->iteration_counter ++; |
2220 | ||
1b64f838 LP |
2221 | bus->current_message = m; |
2222 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2223 | bus->current_handler = c->callback; |
2224 | bus->current_userdata = slot->userdata; | |
19070062 | 2225 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2226 | bus->current_userdata = NULL; |
2227 | bus->current_handler = NULL; | |
d974ad05 | 2228 | bus->current_slot = NULL; |
19befb2d | 2229 | bus->current_message = NULL; |
718db961 | 2230 | |
1b64f838 LP |
2231 | if (slot->floating) { |
2232 | bus_slot_disconnect(slot); | |
2233 | sd_bus_slot_unref(slot); | |
2234 | } | |
2235 | ||
d974ad05 DH |
2236 | sd_bus_slot_unref(slot); |
2237 | ||
1b64f838 | 2238 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2239 | } |
2240 | ||
9d373862 LP |
2241 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2242 | assert(bus); | |
2243 | assert(m); | |
2244 | ||
2245 | if (bus->state != BUS_HELLO) | |
2246 | return 0; | |
2247 | ||
2248 | /* Let's make sure the first message on the bus is the HELLO | |
2249 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2250 | * here (we leave that to the usual handling), we just verify |
2251 | * we don't let any earlier msg through. */ | |
9d373862 | 2252 | |
40ca29a1 LP |
2253 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2254 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2255 | return -EIO; |
2256 | ||
19befb2d | 2257 | if (m->reply_cookie != 1) |
9d373862 LP |
2258 | return -EIO; |
2259 | ||
2260 | return 0; | |
2261 | } | |
2262 | ||
a652755d | 2263 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2264 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2265 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2266 | struct reply_callback *c; |
1b64f838 | 2267 | sd_bus_slot *slot; |
a652755d LP |
2268 | int r; |
2269 | ||
2270 | assert(bus); | |
2271 | assert(m); | |
2272 | ||
40ca29a1 LP |
2273 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2274 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2275 | return 0; |
2276 | ||
09365592 LP |
2277 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2278 | return 0; | |
2279 | ||
2280 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2281 | return 0; | |
2282 | ||
c9fe4af7 | 2283 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2284 | if (!c) |
2285 | return 0; | |
2286 | ||
19befb2d | 2287 | c->cookie = 0; |
19befb2d | 2288 | |
1b64f838 | 2289 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2290 | |
2ce97e2b LP |
2291 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2292 | ||
2293 | /* If the reply contained a file descriptor which we | |
2294 | * didn't want we pass an error instead. */ | |
2295 | ||
2296 | r = bus_message_new_synthetic_error( | |
2297 | bus, | |
2298 | m->reply_cookie, | |
2299 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2300 | &synthetic_reply); | |
2301 | if (r < 0) | |
1b64f838 | 2302 | return r; |
2ce97e2b | 2303 | |
52cd5877 LP |
2304 | /* Copy over original timestamp */ |
2305 | synthetic_reply->realtime = m->realtime; | |
2306 | synthetic_reply->monotonic = m->monotonic; | |
2307 | synthetic_reply->seqnum = m->seqnum; | |
2308 | ||
2ce97e2b LP |
2309 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2310 | if (r < 0) | |
1b64f838 | 2311 | return r; |
2ce97e2b LP |
2312 | |
2313 | m = synthetic_reply; | |
2314 | } else { | |
2315 | r = sd_bus_message_rewind(m, true); | |
2316 | if (r < 0) | |
1b64f838 | 2317 | return r; |
2ce97e2b | 2318 | } |
88fe224c | 2319 | |
1b64f838 LP |
2320 | if (c->timeout != 0) { |
2321 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2322 | c->timeout = 0; | |
2323 | } | |
19befb2d | 2324 | |
1b64f838 | 2325 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2326 | bus->current_handler = c->callback; |
2327 | bus->current_userdata = slot->userdata; | |
19070062 | 2328 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2329 | bus->current_userdata = NULL; |
2330 | bus->current_handler = NULL; | |
d974ad05 | 2331 | bus->current_slot = NULL; |
a652755d | 2332 | |
19befb2d LP |
2333 | if (slot->floating) { |
2334 | bus_slot_disconnect(slot); | |
2335 | sd_bus_slot_unref(slot); | |
2336 | } | |
2337 | ||
d974ad05 DH |
2338 | sd_bus_slot_unref(slot); |
2339 | ||
1b64f838 | 2340 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2341 | } |
2342 | ||
2343 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2344 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2345 | struct filter_callback *l; |
2346 | int r; | |
2347 | ||
392d5b37 LP |
2348 | assert(bus); |
2349 | assert(m); | |
2350 | ||
7286037f LP |
2351 | do { |
2352 | bus->filter_callbacks_modified = false; | |
2353 | ||
2354 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2355 | sd_bus_slot *slot; |
7286037f LP |
2356 | |
2357 | if (bus->filter_callbacks_modified) | |
2358 | break; | |
2359 | ||
2360 | /* Don't run this more than once per iteration */ | |
2361 | if (l->last_iteration == bus->iteration_counter) | |
2362 | continue; | |
2363 | ||
2364 | l->last_iteration = bus->iteration_counter; | |
2365 | ||
88fe224c LP |
2366 | r = sd_bus_message_rewind(m, true); |
2367 | if (r < 0) | |
2368 | return r; | |
2369 | ||
1b64f838 LP |
2370 | slot = container_of(l, sd_bus_slot, filter_callback); |
2371 | ||
2372 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2373 | bus->current_handler = l->callback; |
2374 | bus->current_userdata = slot->userdata; | |
19070062 | 2375 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2376 | bus->current_userdata = NULL; |
2377 | bus->current_handler = NULL; | |
1b64f838 | 2378 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2379 | |
ebcf1f97 | 2380 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2381 | if (r != 0) |
2382 | return r; | |
2383 | ||
2384 | } | |
2385 | ||
2386 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2387 | |
2388 | return 0; | |
2389 | } | |
2390 | ||
392d5b37 | 2391 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2392 | int r; |
2393 | ||
392d5b37 LP |
2394 | assert(bus); |
2395 | assert(m); | |
2396 | ||
7286037f LP |
2397 | do { |
2398 | bus->match_callbacks_modified = false; | |
2399 | ||
eb01ba5d | 2400 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2401 | if (r != 0) |
2402 | return r; | |
2403 | ||
2404 | } while (bus->match_callbacks_modified); | |
2405 | ||
2406 | return 0; | |
392d5b37 LP |
2407 | } |
2408 | ||
b9bf7e2b LP |
2409 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2410 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2411 | int r; | |
2412 | ||
2413 | assert(bus); | |
2414 | assert(m); | |
2415 | ||
09365592 LP |
2416 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2417 | return 0; | |
2418 | ||
758bf0c7 LP |
2419 | if (bus->manual_peer_interface) |
2420 | return 0; | |
2421 | ||
40ca29a1 | 2422 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2423 | return 0; |
2424 | ||
2425 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2426 | return 0; | |
2427 | ||
0461f8cd | 2428 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2429 | return 1; |
2430 | ||
2431 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2432 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2433 | else if (streq_ptr(m->member, "GetMachineId")) { |
2434 | sd_id128_t id; | |
2435 | char sid[33]; | |
2436 | ||
2437 | r = sd_id128_get_machine(&id); | |
2438 | if (r < 0) | |
2439 | return r; | |
2440 | ||
df2d202e | 2441 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2442 | if (r < 0) |
2443 | return r; | |
2444 | ||
2445 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2446 | } else { | |
29ddb38f | 2447 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2448 | m, &reply, |
40ca29a1 | 2449 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2450 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2451 | } |
2452 | ||
2453 | if (r < 0) | |
2454 | return r; | |
2455 | ||
2456 | r = sd_bus_send(bus, reply, NULL); | |
2457 | if (r < 0) | |
2458 | return r; | |
2459 | ||
2460 | return 1; | |
2461 | } | |
2462 | ||
2ce97e2b LP |
2463 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2464 | assert(bus); | |
2465 | assert(m); | |
2466 | ||
2467 | /* If we got a message with a file descriptor which we didn't | |
2468 | * want to accept, then let's drop it. How can this even | |
2469 | * happen? For example, when the kernel queues a message into | |
2470 | * an activatable names's queue which allows fds, and then is | |
2471 | * delivered to us later even though we ourselves did not | |
2472 | * negotiate it. */ | |
2473 | ||
09365592 LP |
2474 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2475 | return 0; | |
2476 | ||
2ce97e2b LP |
2477 | if (m->n_fds <= 0) |
2478 | return 0; | |
2479 | ||
2480 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2481 | return 0; | |
2482 | ||
2483 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2484 | return 1; /* just eat it up */ | |
2485 | ||
2486 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2487 | } | |
2488 | ||
992c052c | 2489 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2490 | int r; |
2491 | ||
2492 | assert(bus); | |
992c052c | 2493 | assert(m); |
e3017af9 | 2494 | |
19befb2d | 2495 | bus->current_message = m; |
992c052c | 2496 | bus->iteration_counter++; |
e3017af9 | 2497 | |
f9f97ca6 | 2498 | log_debug_bus_message(m); |
40ca29a1 | 2499 | |
992c052c LP |
2500 | r = process_hello(bus, m); |
2501 | if (r != 0) | |
affff0b6 | 2502 | goto finish; |
a652755d | 2503 | |
992c052c LP |
2504 | r = process_reply(bus, m); |
2505 | if (r != 0) | |
affff0b6 | 2506 | goto finish; |
e3017af9 | 2507 | |
2ce97e2b LP |
2508 | r = process_fd_check(bus, m); |
2509 | if (r != 0) | |
2510 | goto finish; | |
2511 | ||
992c052c LP |
2512 | r = process_filter(bus, m); |
2513 | if (r != 0) | |
affff0b6 | 2514 | goto finish; |
a652755d | 2515 | |
992c052c LP |
2516 | r = process_match(bus, m); |
2517 | if (r != 0) | |
affff0b6 | 2518 | goto finish; |
a652755d | 2519 | |
992c052c LP |
2520 | r = process_builtin(bus, m); |
2521 | if (r != 0) | |
affff0b6 LP |
2522 | goto finish; |
2523 | ||
2524 | r = bus_process_object(bus, m); | |
a652755d | 2525 | |
affff0b6 | 2526 | finish: |
19befb2d | 2527 | bus->current_message = NULL; |
affff0b6 | 2528 | return r; |
29ddb38f | 2529 | } |
88fe224c | 2530 | |
8f8f05a9 LP |
2531 | static int dispatch_track(sd_bus *bus) { |
2532 | assert(bus); | |
2533 | ||
2534 | if (!bus->track_queue) | |
2535 | return 0; | |
2536 | ||
2537 | bus_track_dispatch(bus->track_queue); | |
2538 | return 1; | |
2539 | } | |
2540 | ||
766c5809 | 2541 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2542 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2543 | int r; |
a652755d | 2544 | |
29ddb38f | 2545 | assert(bus); |
992c052c | 2546 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2547 | |
992c052c LP |
2548 | r = process_timeout(bus); |
2549 | if (r != 0) | |
2550 | goto null_message; | |
7286037f | 2551 | |
992c052c LP |
2552 | r = dispatch_wqueue(bus); |
2553 | if (r != 0) | |
2554 | goto null_message; | |
7286037f | 2555 | |
8f8f05a9 LP |
2556 | r = dispatch_track(bus); |
2557 | if (r != 0) | |
2558 | goto null_message; | |
2559 | ||
766c5809 | 2560 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2561 | if (r < 0) |
2562 | return r; | |
2563 | if (!m) | |
2564 | goto null_message; | |
7286037f | 2565 | |
992c052c LP |
2566 | r = process_message(bus, m); |
2567 | if (r != 0) | |
2568 | goto null_message; | |
7286037f | 2569 | |
992c052c LP |
2570 | if (ret) { |
2571 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2572 | if (r < 0) |
2573 | return r; | |
e3017af9 | 2574 | |
992c052c LP |
2575 | *ret = m; |
2576 | m = NULL; | |
2577 | return 1; | |
2578 | } | |
a652755d | 2579 | |
40ca29a1 | 2580 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2581 | |
dc74ce9b LP |
2582 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2583 | strna(sd_bus_message_get_sender(m)), | |
2584 | strna(sd_bus_message_get_path(m)), | |
2585 | strna(sd_bus_message_get_interface(m)), | |
2586 | strna(sd_bus_message_get_member(m))); | |
2587 | ||
992c052c | 2588 | r = sd_bus_reply_method_errorf( |
df2d202e | 2589 | m, |
40ca29a1 | 2590 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2591 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2592 | if (r < 0) |
2593 | return r; | |
2594 | } | |
e3017af9 | 2595 | |
992c052c | 2596 | return 1; |
0a72c2bd | 2597 | |
992c052c LP |
2598 | null_message: |
2599 | if (r >= 0 && ret) | |
2600 | *ret = NULL; | |
0a72c2bd | 2601 | |
992c052c | 2602 | return r; |
29ddb38f | 2603 | } |
0a72c2bd | 2604 | |
718db961 LP |
2605 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2606 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2607 | struct reply_callback *c; | |
2608 | int r; | |
2609 | ||
2610 | assert(bus); | |
2611 | assert(bus->state == BUS_CLOSING); | |
2612 | ||
c9fe4af7 | 2613 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2614 | if (c) { |
ebcf1f97 | 2615 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2616 | sd_bus_slot *slot; |
ebcf1f97 | 2617 | |
718db961 LP |
2618 | /* First, fail all outstanding method calls */ |
2619 | r = bus_message_new_synthetic_error( | |
2620 | bus, | |
693eb9a2 | 2621 | c->cookie, |
14c24659 | 2622 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2623 | &m); |
2624 | if (r < 0) | |
2625 | return r; | |
2626 | ||
7adc46fc | 2627 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2628 | if (r < 0) |
2629 | return r; | |
2630 | ||
19befb2d | 2631 | if (c->timeout != 0) { |
718db961 | 2632 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2633 | c->timeout = 0; |
2634 | } | |
718db961 | 2635 | |
c9fe4af7 | 2636 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2637 | c->cookie = 0; |
2638 | ||
1b64f838 | 2639 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2640 | |
718db961 LP |
2641 | bus->iteration_counter++; |
2642 | ||
1b64f838 LP |
2643 | bus->current_message = m; |
2644 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2645 | bus->current_handler = c->callback; |
2646 | bus->current_userdata = slot->userdata; | |
19070062 | 2647 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2648 | bus->current_userdata = NULL; |
2649 | bus->current_handler = NULL; | |
d974ad05 | 2650 | bus->current_slot = NULL; |
1b64f838 LP |
2651 | bus->current_message = NULL; |
2652 | ||
2653 | if (slot->floating) { | |
2654 | bus_slot_disconnect(slot); | |
2655 | sd_bus_slot_unref(slot); | |
2656 | } | |
718db961 | 2657 | |
d974ad05 DH |
2658 | sd_bus_slot_unref(slot); |
2659 | ||
1b64f838 | 2660 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2661 | } |
2662 | ||
2663 | /* Then, synthesize a Disconnected message */ | |
2664 | r = sd_bus_message_new_signal( | |
2665 | bus, | |
151b9b96 | 2666 | &m, |
718db961 LP |
2667 | "/org/freedesktop/DBus/Local", |
2668 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2669 | "Disconnected"); |
718db961 LP |
2670 | if (r < 0) |
2671 | return r; | |
2672 | ||
fb6d9b77 | 2673 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2674 | |
7adc46fc | 2675 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2676 | if (r < 0) |
2677 | return r; | |
2678 | ||
2679 | sd_bus_close(bus); | |
2680 | ||
19befb2d | 2681 | bus->current_message = m; |
718db961 LP |
2682 | bus->iteration_counter++; |
2683 | ||
2684 | r = process_filter(bus, m); | |
2685 | if (r != 0) | |
2686 | goto finish; | |
2687 | ||
2688 | r = process_match(bus, m); | |
2689 | if (r != 0) | |
2690 | goto finish; | |
2691 | ||
2692 | if (ret) { | |
2693 | *ret = m; | |
2694 | m = NULL; | |
2695 | } | |
2696 | ||
2697 | r = 1; | |
2698 | ||
2699 | finish: | |
19befb2d LP |
2700 | bus->current_message = NULL; |
2701 | ||
718db961 LP |
2702 | return r; |
2703 | } | |
2704 | ||
766c5809 | 2705 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2706 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2707 | int r; |
0a72c2bd | 2708 | |
992c052c LP |
2709 | /* Returns 0 when we didn't do anything. This should cause the |
2710 | * caller to invoke sd_bus_wait() before returning the next | |
2711 | * time. Returns > 0 when we did something, which possibly | |
2712 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2713 | |
d6888822 LP |
2714 | assert_return(bus, -EINVAL); |
2715 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2716 | |
992c052c | 2717 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2718 | assert_return(!bus->current_message, -EBUSY); |
2719 | assert(!bus->current_slot); | |
0a72c2bd | 2720 | |
992c052c | 2721 | switch (bus->state) { |
0a72c2bd | 2722 | |
992c052c | 2723 | case BUS_UNSET: |
992c052c | 2724 | return -ENOTCONN; |
0a72c2bd | 2725 | |
6d6f4904 LP |
2726 | case BUS_CLOSED: |
2727 | return -ECONNRESET; | |
2728 | ||
992c052c LP |
2729 | case BUS_OPENING: |
2730 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2731 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2732 | bus_enter_closing(bus); |
2733 | r = 1; | |
2734 | } else if (r < 0) | |
29ddb38f | 2735 | return r; |
992c052c LP |
2736 | if (ret) |
2737 | *ret = NULL; | |
a652755d LP |
2738 | return r; |
2739 | ||
992c052c | 2740 | case BUS_AUTHENTICATING: |
992c052c | 2741 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2742 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2743 | bus_enter_closing(bus); |
2744 | r = 1; | |
2745 | } else if (r < 0) | |
29ddb38f | 2746 | return r; |
718db961 | 2747 | |
992c052c LP |
2748 | if (ret) |
2749 | *ret = NULL; | |
718db961 | 2750 | |
992c052c | 2751 | return r; |
a652755d | 2752 | |
992c052c LP |
2753 | case BUS_RUNNING: |
2754 | case BUS_HELLO: | |
766c5809 | 2755 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2756 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2757 | bus_enter_closing(bus); |
2758 | r = 1; | |
2759 | ||
2760 | if (ret) | |
2761 | *ret = NULL; | |
2762 | } | |
43a43f50 | 2763 | |
43a43f50 | 2764 | return r; |
718db961 LP |
2765 | |
2766 | case BUS_CLOSING: | |
2767 | return process_closing(bus, ret); | |
992c052c | 2768 | } |
43a43f50 | 2769 | |
992c052c | 2770 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2771 | } |
2772 | ||
766c5809 LP |
2773 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2774 | return bus_process_internal(bus, false, 0, ret); | |
2775 | } | |
2776 | ||
2777 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2778 | return bus_process_internal(bus, true, priority, ret); | |
2779 | } | |
2780 | ||
992c052c LP |
2781 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2782 | struct pollfd p[2] = {}; | |
2783 | int r, e, n; | |
2784 | struct timespec ts; | |
3a43da28 | 2785 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2786 | |
2787 | assert(bus); | |
718db961 LP |
2788 | |
2789 | if (bus->state == BUS_CLOSING) | |
2790 | return 1; | |
2791 | ||
a3d59cd1 LP |
2792 | if (!BUS_IS_OPEN(bus->state)) |
2793 | return -ENOTCONN; | |
adcdb374 | 2794 | |
992c052c LP |
2795 | e = sd_bus_get_events(bus); |
2796 | if (e < 0) | |
2797 | return e; | |
adcdb374 | 2798 | |
992c052c | 2799 | if (need_more) |
8efd6381 LP |
2800 | /* The caller really needs some more data, he doesn't |
2801 | * care about what's already read, or any timeouts | |
ad67ef27 | 2802 | * except its own. */ |
992c052c | 2803 | e |= POLLIN; |
992c052c | 2804 | else { |
8efd6381 LP |
2805 | usec_t until; |
2806 | /* The caller wants to process if there's something to | |
2807 | * process, but doesn't care otherwise */ | |
2808 | ||
2809 | r = sd_bus_get_timeout(bus, &until); | |
2810 | if (r < 0) | |
2811 | return r; | |
2812 | if (r > 0) { | |
2813 | usec_t nw; | |
2814 | nw = now(CLOCK_MONOTONIC); | |
2815 | m = until > nw ? until - nw : 0; | |
2816 | } | |
992c052c | 2817 | } |
adcdb374 | 2818 | |
992c052c LP |
2819 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2820 | m = timeout_usec; | |
adcdb374 | 2821 | |
992c052c LP |
2822 | p[0].fd = bus->input_fd; |
2823 | if (bus->output_fd == bus->input_fd) { | |
2824 | p[0].events = e; | |
2825 | n = 1; | |
2826 | } else { | |
2827 | p[0].events = e & POLLIN; | |
2828 | p[1].fd = bus->output_fd; | |
2829 | p[1].events = e & POLLOUT; | |
2830 | n = 2; | |
adcdb374 LP |
2831 | } |
2832 | ||
992c052c | 2833 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2834 | if (r < 0) |
992c052c | 2835 | return -errno; |
adcdb374 | 2836 | |
992c052c | 2837 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2838 | } |
2839 | ||
d9f644e2 | 2840 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2841 | |
d6888822 | 2842 | assert_return(bus, -EINVAL); |
d6888822 | 2843 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2844 | |
718db961 LP |
2845 | if (bus->state == BUS_CLOSING) |
2846 | return 0; | |
2847 | ||
a3d59cd1 LP |
2848 | if (!BUS_IS_OPEN(bus->state)) |
2849 | return -ENOTCONN; | |
718db961 | 2850 | |
992c052c LP |
2851 | if (bus->rqueue_size > 0) |
2852 | return 0; | |
9db76355 | 2853 | |
992c052c LP |
2854 | return bus_poll(bus, false, timeout_usec); |
2855 | } | |
9db76355 | 2856 | |
d9f644e2 | 2857 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2858 | int r; |
9db76355 | 2859 | |
d6888822 | 2860 | assert_return(bus, -EINVAL); |
d6888822 | 2861 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2862 | |
718db961 LP |
2863 | if (bus->state == BUS_CLOSING) |
2864 | return 0; | |
2865 | ||
a3d59cd1 LP |
2866 | if (!BUS_IS_OPEN(bus->state)) |
2867 | return -ENOTCONN; | |
718db961 | 2868 | |
992c052c LP |
2869 | r = bus_ensure_running(bus); |
2870 | if (r < 0) | |
2871 | return r; | |
9db76355 | 2872 | |
992c052c LP |
2873 | if (bus->wqueue_size <= 0) |
2874 | return 0; | |
9db76355 | 2875 | |
992c052c LP |
2876 | for (;;) { |
2877 | r = dispatch_wqueue(bus); | |
32f46480 | 2878 | if (r < 0) { |
441d56a1 | 2879 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2880 | bus_enter_closing(bus); |
441d56a1 LP |
2881 | return -ECONNRESET; |
2882 | } | |
32f46480 | 2883 | |
9db76355 | 2884 | return r; |
32f46480 | 2885 | } |
9db76355 | 2886 | |
992c052c LP |
2887 | if (bus->wqueue_size <= 0) |
2888 | return 0; | |
9db76355 | 2889 | |
992c052c | 2890 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2891 | if (r < 0) |
2892 | return r; | |
9db76355 | 2893 | } |
9db76355 LP |
2894 | } |
2895 | ||
19befb2d LP |
2896 | _public_ int sd_bus_add_filter( |
2897 | sd_bus *bus, | |
2898 | sd_bus_slot **slot, | |
2899 | sd_bus_message_handler_t callback, | |
2900 | void *userdata) { | |
d9f644e2 | 2901 | |
19befb2d | 2902 | sd_bus_slot *s; |
de1c301e | 2903 | |
d6888822 LP |
2904 | assert_return(bus, -EINVAL); |
2905 | assert_return(callback, -EINVAL); | |
2906 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2907 | |
19befb2d LP |
2908 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2909 | if (!s) | |
29ddb38f LP |
2910 | return -ENOMEM; |
2911 | ||
19befb2d | 2912 | s->filter_callback.callback = callback; |
a652755d | 2913 | |
19befb2d LP |
2914 | bus->filter_callbacks_modified = true; |
2915 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2916 | |
19befb2d LP |
2917 | if (slot) |
2918 | *slot = s; | |
29ddb38f | 2919 | |
992c052c | 2920 | return 0; |
a652755d | 2921 | } |
392d5b37 | 2922 | |
19befb2d LP |
2923 | _public_ int sd_bus_add_match( |
2924 | sd_bus *bus, | |
2925 | sd_bus_slot **slot, | |
2926 | const char *match, | |
2927 | sd_bus_message_handler_t callback, | |
2928 | void *userdata) { | |
d9f644e2 | 2929 | |
992c052c LP |
2930 | struct bus_match_component *components = NULL; |
2931 | unsigned n_components = 0; | |
2915234d | 2932 | sd_bus_slot *s = NULL; |
992c052c | 2933 | int r = 0; |
392d5b37 | 2934 | |
d6888822 LP |
2935 | assert_return(bus, -EINVAL); |
2936 | assert_return(match, -EINVAL); | |
2937 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2938 | |
992c052c LP |
2939 | r = bus_match_parse(match, &components, &n_components); |
2940 | if (r < 0) | |
2941 | goto finish; | |
29ddb38f | 2942 | |
19befb2d LP |
2943 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2944 | if (!s) { | |
2945 | r = -ENOMEM; | |
2946 | goto finish; | |
2947 | } | |
2948 | ||
2949 | s->match_callback.callback = callback; | |
2950 | s->match_callback.cookie = ++bus->match_cookie; | |
2951 | ||
992c052c | 2952 | if (bus->bus_client) { |
29ddb38f | 2953 | |
19befb2d LP |
2954 | if (!bus->is_kernel) { |
2955 | /* When this is not a kernel transport, we | |
2956 | * store the original match string, so that we | |
2957 | * can use it to remove the match again */ | |
2958 | ||
2959 | s->match_callback.match_string = strdup(match); | |
2960 | if (!s->match_callback.match_string) { | |
2961 | r = -ENOMEM; | |
2962 | goto finish; | |
2963 | } | |
2964 | } | |
2965 | ||
2966 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); | |
992c052c LP |
2967 | if (r < 0) |
2968 | goto finish; | |
392d5b37 LP |
2969 | } |
2970 | ||
992c052c | 2971 | bus->match_callbacks_modified = true; |
19befb2d LP |
2972 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2973 | if (r < 0) | |
2974 | goto finish; | |
2975 | ||
2976 | if (slot) | |
2977 | *slot = s; | |
2978 | s = NULL; | |
917b5dc7 | 2979 | |
992c052c LP |
2980 | finish: |
2981 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2982 | sd_bus_slot_unref(s); |
2983 | ||
992c052c | 2984 | return r; |
917b5dc7 LP |
2985 | } |
2986 | ||
19befb2d LP |
2987 | int bus_remove_match_by_string( |
2988 | sd_bus *bus, | |
2989 | const char *match, | |
2990 | sd_bus_message_handler_t callback, | |
2991 | void *userdata) { | |
d9f644e2 | 2992 | |
992c052c LP |
2993 | struct bus_match_component *components = NULL; |
2994 | unsigned n_components = 0; | |
19befb2d LP |
2995 | struct match_callback *c; |
2996 | int r = 0; | |
917b5dc7 | 2997 | |
d6888822 LP |
2998 | assert_return(bus, -EINVAL); |
2999 | assert_return(match, -EINVAL); | |
3000 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3001 | |
992c052c | 3002 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3003 | if (r < 0) |
19befb2d | 3004 | goto finish; |
f10dda3b | 3005 | |
19befb2d LP |
3006 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3007 | if (r <= 0) | |
3008 | goto finish; | |
f10dda3b | 3009 | |
19befb2d | 3010 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3011 | |
19befb2d | 3012 | finish: |
992c052c | 3013 | bus_match_parse_free(components, n_components); |
f10dda3b | 3014 | |
19befb2d | 3015 | return r; |
f10dda3b LP |
3016 | } |
3017 | ||
992c052c LP |
3018 | bool bus_pid_changed(sd_bus *bus) { |
3019 | assert(bus); | |
f10dda3b | 3020 | |
992c052c LP |
3021 | /* We don't support people creating a bus connection and |
3022 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3023 | |
992c052c | 3024 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3025 | } |
40ca29a1 LP |
3026 | |
3027 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3028 | sd_bus *bus = userdata; |
40ca29a1 LP |
3029 | int r; |
3030 | ||
3031 | assert(bus); | |
3032 | ||
3033 | r = sd_bus_process(bus, NULL); | |
3034 | if (r < 0) | |
3035 | return r; | |
3036 | ||
3037 | return 1; | |
3038 | } | |
3039 | ||
3040 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3041 | sd_bus *bus = userdata; |
40ca29a1 LP |
3042 | int r; |
3043 | ||
3044 | assert(bus); | |
3045 | ||
3046 | r = sd_bus_process(bus, NULL); | |
3047 | if (r < 0) | |
3048 | return r; | |
3049 | ||
3050 | return 1; | |
3051 | } | |
3052 | ||
3053 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3054 | sd_bus *bus = userdata; | |
3055 | int r, e; | |
3056 | usec_t until; | |
3057 | ||
3058 | assert(s); | |
3059 | assert(bus); | |
3060 | ||
3061 | e = sd_bus_get_events(bus); | |
3062 | if (e < 0) | |
3063 | return e; | |
3064 | ||
3065 | if (bus->output_fd != bus->input_fd) { | |
3066 | ||
3067 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3068 | if (r < 0) | |
3069 | return r; | |
3070 | ||
3071 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3072 | if (r < 0) | |
3073 | return r; | |
3074 | } else { | |
3075 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3076 | if (r < 0) | |
3077 | return r; | |
3078 | } | |
3079 | ||
3080 | r = sd_bus_get_timeout(bus, &until); | |
3081 | if (r < 0) | |
3082 | return r; | |
3083 | if (r > 0) { | |
3084 | int j; | |
3085 | ||
3086 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3087 | if (j < 0) | |
3088 | return j; | |
3089 | } | |
3090 | ||
3091 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3092 | if (r < 0) | |
3093 | return r; | |
3094 | ||
3095 | return 1; | |
3096 | } | |
3097 | ||
abc5fe72 LP |
3098 | static int quit_callback(sd_event_source *event, void *userdata) { |
3099 | sd_bus *bus = userdata; | |
3100 | ||
3101 | assert(event); | |
3102 | ||
3103 | sd_bus_flush(bus); | |
7bb4d371 | 3104 | sd_bus_close(bus); |
abc5fe72 LP |
3105 | |
3106 | return 1; | |
3107 | } | |
3108 | ||
1e05d493 LP |
3109 | static int attach_io_events(sd_bus *bus) { |
3110 | int r; | |
3111 | ||
3112 | assert(bus); | |
3113 | ||
3114 | if (bus->input_fd < 0) | |
3115 | return 0; | |
3116 | ||
3117 | if (!bus->event) | |
3118 | return 0; | |
3119 | ||
3120 | if (!bus->input_io_event_source) { | |
151b9b96 | 3121 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3122 | if (r < 0) |
3123 | return r; | |
3124 | ||
3125 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3126 | if (r < 0) | |
3127 | return r; | |
3128 | ||
3129 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3130 | if (r < 0) |
3131 | return r; | |
3132 | ||
356779df | 3133 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3134 | } else |
3135 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3136 | ||
3137 | if (r < 0) | |
3138 | return r; | |
3139 | ||
3140 | if (bus->output_fd != bus->input_fd) { | |
3141 | assert(bus->output_fd >= 0); | |
3142 | ||
3143 | if (!bus->output_io_event_source) { | |
151b9b96 | 3144 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3145 | if (r < 0) |
3146 | return r; | |
3147 | ||
3148 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3149 | if (r < 0) |
3150 | return r; | |
3151 | ||
356779df | 3152 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3153 | } else |
3154 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3155 | ||
3156 | if (r < 0) | |
3157 | return r; | |
3158 | } | |
3159 | ||
3160 | return 0; | |
3161 | } | |
3162 | ||
3163 | static void detach_io_events(sd_bus *bus) { | |
3164 | assert(bus); | |
3165 | ||
3166 | if (bus->input_io_event_source) { | |
3167 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3168 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3169 | } | |
3170 | ||
3171 | if (bus->output_io_event_source) { | |
3172 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3173 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3174 | } | |
3175 | } | |
3176 | ||
d9f644e2 | 3177 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3178 | int r; |
3179 | ||
3180 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3181 | assert_return(!bus->event, -EBUSY); |
3182 | ||
3183 | assert(!bus->input_io_event_source); | |
3184 | assert(!bus->output_io_event_source); | |
3185 | assert(!bus->time_event_source); | |
3186 | ||
76b54375 LP |
3187 | if (event) |
3188 | bus->event = sd_event_ref(event); | |
3189 | else { | |
3190 | r = sd_event_default(&bus->event); | |
3191 | if (r < 0) | |
3192 | return r; | |
3193 | } | |
40ca29a1 | 3194 | |
1e05d493 | 3195 | bus->event_priority = priority; |
40ca29a1 | 3196 | |
6a0f1f6d | 3197 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3198 | if (r < 0) |
3199 | goto fail; | |
3200 | ||
3201 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3202 | if (r < 0) | |
3203 | goto fail; | |
3204 | ||
356779df | 3205 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3206 | if (r < 0) |
3207 | goto fail; | |
3208 | ||
151b9b96 | 3209 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3210 | if (r < 0) |
3211 | goto fail; | |
3212 | ||
356779df | 3213 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3214 | if (r < 0) |
3215 | goto fail; | |
3216 | ||
1e05d493 LP |
3217 | r = attach_io_events(bus); |
3218 | if (r < 0) | |
3219 | goto fail; | |
3220 | ||
40ca29a1 LP |
3221 | return 0; |
3222 | ||
3223 | fail: | |
3224 | sd_bus_detach_event(bus); | |
3225 | return r; | |
3226 | } | |
3227 | ||
d9f644e2 | 3228 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3229 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3230 | |
3231 | if (!bus->event) | |
3232 | return 0; | |
40ca29a1 | 3233 | |
1e05d493 | 3234 | detach_io_events(bus); |
40ca29a1 | 3235 | |
86befb40 LP |
3236 | if (bus->time_event_source) { |
3237 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3238 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3239 | } |
40ca29a1 | 3240 | |
86befb40 LP |
3241 | if (bus->quit_event_source) { |
3242 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3243 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3244 | } |
abc5fe72 | 3245 | |
93f1bcf4 | 3246 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3247 | return 1; |
40ca29a1 | 3248 | } |
affff0b6 | 3249 | |
2be44176 LP |
3250 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3251 | assert_return(bus, NULL); | |
3252 | ||
3253 | return bus->event; | |
3254 | } | |
3255 | ||
19befb2d LP |
3256 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3257 | assert_return(bus, NULL); | |
3258 | ||
3259 | return bus->current_message; | |
3260 | } | |
3261 | ||
3262 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3263 | assert_return(bus, NULL); |
3264 | ||
19befb2d | 3265 | return bus->current_slot; |
affff0b6 | 3266 | } |
76b54375 | 3267 | |
caa82984 LP |
3268 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3269 | assert_return(bus, NULL); | |
3270 | ||
3271 | return bus->current_handler; | |
3272 | } | |
3273 | ||
3274 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3275 | assert_return(bus, NULL); | |
3276 | ||
3277 | return bus->current_userdata; | |
3278 | } | |
3279 | ||
76b54375 LP |
3280 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3281 | sd_bus *b = NULL; | |
3282 | int r; | |
3283 | ||
3284 | assert(bus_open); | |
3285 | assert(default_bus); | |
3286 | ||
3287 | if (!ret) | |
3288 | return !!*default_bus; | |
3289 | ||
3290 | if (*default_bus) { | |
3291 | *ret = sd_bus_ref(*default_bus); | |
3292 | return 0; | |
3293 | } | |
3294 | ||
3295 | r = bus_open(&b); | |
3296 | if (r < 0) | |
3297 | return r; | |
3298 | ||
3299 | b->default_bus_ptr = default_bus; | |
3300 | b->tid = gettid(); | |
3301 | *default_bus = b; | |
3302 | ||
3303 | *ret = b; | |
3304 | return 1; | |
3305 | } | |
3306 | ||
3307 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 3308 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
3309 | |
3310 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
3311 | } | |
3312 | ||
3313 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 3314 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
3315 | |
3316 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
3317 | } | |
3318 | ||
af08d2f9 LP |
3319 | _public_ int sd_bus_default(sd_bus **ret) { |
3320 | ||
3321 | const char *e; | |
3322 | ||
3323 | /* Let's try our best to reuse another cached connection. If | |
3324 | * the starter bus type is set, connect via our normal | |
3325 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3326 | * we can share the connection with the user/system default | |
3327 | * bus. */ | |
3328 | ||
3329 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3330 | if (e) { | |
3331 | if (streq(e, "system")) | |
3332 | return sd_bus_default_system(ret); | |
09365592 | 3333 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3334 | return sd_bus_default_user(ret); |
3335 | } | |
3336 | ||
3337 | /* No type is specified, so we have not other option than to | |
3338 | * use the starter address if it is set. */ | |
3339 | ||
3340 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3341 | if (e) { | |
3342 | static thread_local sd_bus *default_starter_bus = NULL; | |
3343 | ||
3344 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3345 | } | |
3346 | ||
3347 | /* Finally, if nothing is set use the cached connection for | |
3348 | * the right scope */ | |
3349 | ||
3350 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3351 | return sd_bus_default_user(ret); | |
3352 | else | |
3353 | return sd_bus_default_system(ret); | |
3354 | } | |
3355 | ||
76b54375 LP |
3356 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3357 | assert_return(b, -EINVAL); | |
3358 | assert_return(tid, -EINVAL); | |
3359 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3360 | ||
3361 | if (b->tid != 0) { | |
3362 | *tid = b->tid; | |
3363 | return 0; | |
3364 | } | |
3365 | ||
3366 | if (b->event) | |
3367 | return sd_event_get_tid(b->event, tid); | |
3368 | ||
3369 | return -ENXIO; | |
3370 | } | |
28383ba1 | 3371 | |
a6278b88 LP |
3372 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3373 | _cleanup_free_ char *e = NULL; | |
3374 | char *ret; | |
3375 | ||
3376 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3377 | assert_return(external_id, -EINVAL); | |
3378 | assert_return(ret_path, -EINVAL); | |
3379 | ||
3380 | e = bus_label_escape(external_id); | |
3381 | if (!e) | |
3382 | return -ENOMEM; | |
3383 | ||
3384 | ret = strjoin(prefix, "/", e, NULL); | |
3385 | if (!ret) | |
3386 | return -ENOMEM; | |
3387 | ||
3388 | *ret_path = ret; | |
3389 | return 0; | |
28383ba1 LP |
3390 | } |
3391 | ||
a6278b88 LP |
3392 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3393 | const char *e; | |
3394 | char *ret; | |
3395 | ||
3396 | assert_return(object_path_is_valid(path), -EINVAL); | |
3397 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3398 | assert_return(external_id, -EINVAL); | |
3399 | ||
3400 | e = object_path_startswith(path, prefix); | |
3401 | if (!e) { | |
3402 | *external_id = NULL; | |
3403 | return 0; | |
3404 | } | |
3405 | ||
3406 | ret = bus_label_unescape(e); | |
3407 | if (!ret) | |
3408 | return -ENOMEM; | |
3409 | ||
3410 | *external_id = ret; | |
3411 | return 1; | |
28383ba1 | 3412 | } |
5b12334d | 3413 | |
ae095f86 LP |
3414 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3415 | int r; | |
3416 | ||
3417 | assert_return(bus, -EINVAL); | |
ae095f86 | 3418 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3419 | |
3420 | if (!bus->is_kernel) | |
15411c0c | 3421 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3422 | |
3423 | if (!BUS_IS_OPEN(bus->state)) | |
3424 | return -ENOTCONN; | |
ae095f86 | 3425 | |
bd746b8b LP |
3426 | if (bus->rqueue_size > 0) |
3427 | return -EBUSY; | |
3428 | ||
14f862a5 LP |
3429 | if (bus->wqueue_size > 0) |
3430 | return -EBUSY; | |
3431 | ||
ae095f86 LP |
3432 | r = bus_kernel_try_close(bus); |
3433 | if (r < 0) | |
3434 | return r; | |
3435 | ||
3436 | sd_bus_close(bus); | |
3437 | return 0; | |
3438 | } | |
5972fe95 | 3439 | |
455971c1 | 3440 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3441 | assert_return(bus, -EINVAL); |
455971c1 | 3442 | assert_return(description, -EINVAL); |
f4b2933e | 3443 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3444 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3445 | ||
455971c1 | 3446 | *description = bus->description; |
5972fe95 LP |
3447 | return 0; |
3448 | } | |
fe3f22d1 DK |
3449 | |
3450 | int bus_get_root_path(sd_bus *bus) { | |
3451 | int r; | |
3452 | ||
3453 | if (bus->cgroup_root) | |
3454 | return 0; | |
3455 | ||
3456 | r = cg_get_root_path(&bus->cgroup_root); | |
3457 | if (r == -ENOENT) { | |
3458 | bus->cgroup_root = strdup("/"); | |
3459 | if (!bus->cgroup_root) | |
3460 | return -ENOMEM; | |
3461 | ||
3462 | r = 0; | |
3463 | } | |
3464 | ||
3465 | return r; | |
3466 | } | |
3acc1daf LP |
3467 | |
3468 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3469 | int r; | |
3470 | ||
3471 | assert_return(bus, -EINVAL); | |
3472 | assert_return(scope, -EINVAL); | |
3473 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3474 | ||
3475 | if (bus->is_kernel) { | |
3476 | _cleanup_free_ char *n = NULL; | |
3477 | const char *dash; | |
3478 | ||
3479 | r = bus_kernel_get_bus_name(bus, &n); | |
3480 | if (r < 0) | |
3481 | return r; | |
3482 | ||
3483 | if (streq(n, "0-system")) { | |
3484 | *scope = "system"; | |
5b820358 | 3485 | return 0; |
3acc1daf LP |
3486 | } |
3487 | ||
3488 | dash = strchr(n, '-'); | |
d2df88ff | 3489 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3490 | *scope = "user"; |
5b820358 | 3491 | return 0; |
3acc1daf LP |
3492 | } |
3493 | } | |
3494 | ||
3495 | if (bus->is_user) { | |
3496 | *scope = "user"; | |
5b820358 | 3497 | return 0; |
3acc1daf LP |
3498 | } |
3499 | ||
3500 | if (bus->is_system) { | |
3501 | *scope = "system"; | |
5b820358 LP |
3502 | return 0; |
3503 | } | |
3504 | ||
3505 | return -ENODATA; | |
3506 | } | |
3507 | ||
3508 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3509 | ||
3510 | assert_return(bus, -EINVAL); | |
3511 | assert_return(address, -EINVAL); | |
3512 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3513 | ||
3514 | if (bus->address) { | |
3515 | *address = bus->address; | |
3516 | return 0; | |
3acc1daf LP |
3517 | } |
3518 | ||
3519 | return -ENODATA; | |
3520 | } | |
224b3787 | 3521 | |
882897af | 3522 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3523 | assert_return(bus, -EINVAL); |
3524 | assert_return(mask, -EINVAL); | |
3525 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3526 | ||
3527 | *mask = bus->creds_mask; | |
3528 | return 0; | |
3529 | } | |
3530 | ||
882897af | 3531 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3532 | assert_return(bus, -EINVAL); |
3533 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3534 | ||
3535 | return bus->bus_client; | |
3536 | } | |
3537 | ||
882897af | 3538 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3539 | assert_return(bus, -EINVAL); |
3540 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3541 | ||
3542 | return bus->is_server; | |
3543 | } | |
3544 | ||
882897af | 3545 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3546 | assert_return(bus, -EINVAL); |
3547 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3548 | ||
3549 | return bus->anonymous_auth; | |
3550 | } | |
3551 | ||
882897af | 3552 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3553 | assert_return(bus, -EINVAL); |
3554 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3555 | ||
3556 | return bus->trusted; | |
3557 | } | |
3558 | ||
882897af | 3559 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3560 | assert_return(bus, -EINVAL); |
3561 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3562 | ||
3563 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3564 | } |