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Commit | Line | Data |
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de1c301e LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <endian.h> | |
de1c301e | 21 | #include <netdb.h> |
0a6f50c0 | 22 | #include <poll.h> |
45fbe937 | 23 | #include <pthread.h> |
cf0fbc49 TA |
24 | #include <stdlib.h> |
25 | #include <sys/mman.h> | |
26 | #include <unistd.h> | |
de1c301e | 27 | |
de1c301e | 28 | #include "sd-bus.h" |
07630cea | 29 | |
b5efdb8a | 30 | #include "alloc-util.h" |
07630cea LP |
31 | #include "bus-container.h" |
32 | #include "bus-control.h" | |
de1c301e | 33 | #include "bus-internal.h" |
6629161f | 34 | #include "bus-kernel.h" |
07630cea LP |
35 | #include "bus-label.h" |
36 | #include "bus-message.h" | |
992c052c | 37 | #include "bus-objects.h" |
0461f8cd | 38 | #include "bus-protocol.h" |
19befb2d | 39 | #include "bus-slot.h" |
07630cea LP |
40 | #include "bus-socket.h" |
41 | #include "bus-track.h" | |
42 | #include "bus-type.h" | |
43 | #include "bus-util.h" | |
44 | #include "cgroup-util.h" | |
45 | #include "def.h" | |
3ffd4af2 | 46 | #include "fd-util.h" |
cf0fbc49 | 47 | #include "hexdecoct.h" |
07630cea LP |
48 | #include "hostname-util.h" |
49 | #include "macro.h" | |
50 | #include "missing.h" | |
6bedfcbb | 51 | #include "parse-util.h" |
07630cea LP |
52 | #include "string-util.h" |
53 | #include "strv.h" | |
54 | #include "util.h" | |
de1c301e | 55 | |
b56c4604 LP |
56 | #define log_debug_bus_message(m) \ |
57 | do { \ | |
58 | sd_bus_message *_mm = (m); \ | |
59 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", \ | |
60 | bus_message_type_to_string(_mm->header->type), \ | |
61 | strna(sd_bus_message_get_sender(_mm)), \ | |
62 | strna(sd_bus_message_get_destination(_mm)), \ | |
63 | strna(sd_bus_message_get_path(_mm)), \ | |
64 | strna(sd_bus_message_get_interface(_mm)), \ | |
65 | strna(sd_bus_message_get_member(_mm)), \ | |
66 | BUS_MESSAGE_COOKIE(_mm), \ | |
67 | _mm->reply_cookie, \ | |
68 | strna(_mm->error.message)); \ | |
69 | } while (false) | |
f9f97ca6 | 70 | |
e3017af9 | 71 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
72 | static int attach_io_events(sd_bus *b); |
73 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 74 | |
fa2f8973 LP |
75 | static thread_local sd_bus *default_system_bus = NULL; |
76 | static thread_local sd_bus *default_user_bus = NULL; | |
77 | static thread_local sd_bus *default_starter_bus = NULL; | |
78 | ||
f54514f3 LP |
79 | static void bus_close_fds(sd_bus *b) { |
80 | assert(b); | |
81 | ||
1e05d493 LP |
82 | detach_io_events(b); |
83 | ||
0fd8d506 | 84 | if (b->input_fd != b->output_fd) |
03e334a1 | 85 | safe_close(b->output_fd); |
0fd8d506 | 86 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
87 | } |
88 | ||
0e586eae | 89 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
90 | assert(b); |
91 | ||
f389bf15 LP |
92 | while (b->rqueue_size > 0) |
93 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
94 | ||
253f96e5 | 95 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 96 | b->rqueue_allocated = 0; |
0e586eae | 97 | |
f389bf15 LP |
98 | while (b->wqueue_size > 0) |
99 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 100 | |
253f96e5 | 101 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 102 | b->wqueue_allocated = 0; |
0e586eae LP |
103 | } |
104 | ||
de1c301e | 105 | static void bus_free(sd_bus *b) { |
19befb2d | 106 | sd_bus_slot *s; |
de1c301e LP |
107 | |
108 | assert(b); | |
8f8f05a9 LP |
109 | assert(!b->track_queue); |
110 | ||
19befb2d LP |
111 | b->state = BUS_CLOSED; |
112 | ||
40ca29a1 LP |
113 | sd_bus_detach_event(b); |
114 | ||
19befb2d LP |
115 | while ((s = b->slots)) { |
116 | /* At this point only floating slots can still be | |
117 | * around, because the non-floating ones keep a | |
118 | * reference to the bus, and we thus couldn't be | |
119 | * destructing right now... We forcibly disconnect the | |
120 | * slots here, so that they still can be referenced by | |
121 | * apps, but are dead. */ | |
122 | ||
123 | assert(s->floating); | |
124 | bus_slot_disconnect(s); | |
125 | sd_bus_slot_unref(s); | |
126 | } | |
127 | ||
f4d140e9 LP |
128 | if (b->default_bus_ptr) |
129 | *b->default_bus_ptr = NULL; | |
130 | ||
f54514f3 | 131 | bus_close_fds(b); |
de1c301e | 132 | |
63edf05e LP |
133 | if (b->kdbus_buffer) |
134 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
135 | ||
c4e6556c | 136 | free(b->label); |
de1c301e | 137 | free(b->rbuffer); |
89ffcd2a | 138 | free(b->unique_name); |
2181a7f5 | 139 | free(b->auth_buffer); |
89ffcd2a | 140 | free(b->address); |
e9a967f9 | 141 | free(b->kernel); |
a7893c6b | 142 | free(b->machine); |
8a0e0ed9 | 143 | free(b->fake_label); |
751bc6ac | 144 | free(b->cgroup_root); |
455971c1 | 145 | free(b->description); |
89ffcd2a | 146 | |
2fd9ae2e LP |
147 | free(b->exec_path); |
148 | strv_free(b->exec_argv); | |
149 | ||
2c93b4ef LP |
150 | close_many(b->fds, b->n_fds); |
151 | free(b->fds); | |
152 | ||
0e586eae | 153 | bus_reset_queues(b); |
de1c301e | 154 | |
c9fe4af7 | 155 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 156 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 157 | |
75a0da95 | 158 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
159 | bus_match_free(&b->match_callbacks); |
160 | ||
29ddb38f LP |
161 | hashmap_free_free(b->vtable_methods); |
162 | hashmap_free_free(b->vtable_properties); | |
163 | ||
19befb2d | 164 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
165 | hashmap_free(b->nodes); |
166 | ||
bc7fd8cd LP |
167 | bus_kernel_flush_memfd(b); |
168 | ||
45fbe937 LP |
169 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
170 | ||
de1c301e LP |
171 | free(b); |
172 | } | |
173 | ||
d9f644e2 | 174 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
175 | sd_bus *r; |
176 | ||
d6888822 | 177 | assert_return(ret, -EINVAL); |
021a1e78 | 178 | |
de1c301e LP |
179 | r = new0(sd_bus, 1); |
180 | if (!r) | |
021a1e78 | 181 | return -ENOMEM; |
de1c301e | 182 | |
e4ee6e5c | 183 | r->n_ref = REFCNT_INIT; |
e82c9509 | 184 | r->input_fd = r->output_fd = -1; |
de1c301e | 185 | r->message_version = 1; |
3310dfd5 | 186 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 187 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 188 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 189 | r->original_pid = getpid(); |
de1c301e | 190 | |
45fbe937 LP |
191 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
192 | ||
de1c301e LP |
193 | /* We guarantee that wqueue always has space for at least one |
194 | * entry */ | |
821e0756 | 195 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 196 | free(r); |
021a1e78 | 197 | return -ENOMEM; |
de1c301e LP |
198 | } |
199 | ||
021a1e78 LP |
200 | *ret = r; |
201 | return 0; | |
202 | } | |
203 | ||
d9f644e2 | 204 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
205 | char *a; |
206 | ||
d6888822 LP |
207 | assert_return(bus, -EINVAL); |
208 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
209 | assert_return(address, -EINVAL); | |
210 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
211 | |
212 | a = strdup(address); | |
213 | if (!a) | |
214 | return -ENOMEM; | |
215 | ||
216 | free(bus->address); | |
217 | bus->address = a; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
d9f644e2 | 222 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
223 | assert_return(bus, -EINVAL); |
224 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
225 | assert_return(input_fd >= 0, -EBADF); |
226 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 227 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 228 | |
e82c9509 LP |
229 | bus->input_fd = input_fd; |
230 | bus->output_fd = output_fd; | |
021a1e78 LP |
231 | return 0; |
232 | } | |
233 | ||
d9f644e2 | 234 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
235 | char *p, **a; |
236 | ||
d6888822 LP |
237 | assert_return(bus, -EINVAL); |
238 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
239 | assert_return(path, -EINVAL); | |
240 | assert_return(!strv_isempty(argv), -EINVAL); | |
241 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
242 | |
243 | p = strdup(path); | |
244 | if (!p) | |
245 | return -ENOMEM; | |
246 | ||
247 | a = strv_copy(argv); | |
248 | if (!a) { | |
249 | free(p); | |
250 | return -ENOMEM; | |
251 | } | |
252 | ||
253 | free(bus->exec_path); | |
254 | strv_free(bus->exec_argv); | |
255 | ||
256 | bus->exec_path = p; | |
257 | bus->exec_argv = a; | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
d9f644e2 | 262 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
263 | assert_return(bus, -EINVAL); |
264 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
265 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 266 | |
94bbf1ba | 267 | bus->bus_client = !!b; |
021a1e78 LP |
268 | return 0; |
269 | } | |
270 | ||
09365592 LP |
271 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
272 | assert_return(bus, -EINVAL); | |
273 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
274 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
275 | ||
276 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
277 | return 0; | |
278 | } | |
279 | ||
d9f644e2 | 280 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
281 | assert_return(bus, -EINVAL); |
282 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
283 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 284 | |
264ad849 LP |
285 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
286 | return 0; | |
287 | } | |
288 | ||
4fc31988 | 289 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 290 | uint64_t new_flags; |
16be4368 | 291 | assert_return(bus, -EINVAL); |
b5dae4c7 | 292 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
293 | assert_return(!bus_pid_changed(bus), -ECHILD); |
294 | ||
b5dae4c7 LP |
295 | new_flags = bus->attach_flags; |
296 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
297 | ||
298 | if (bus->attach_flags == new_flags) | |
299 | return 0; | |
300 | ||
301 | bus->attach_flags = new_flags; | |
302 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
303 | bus_kernel_realize_attach_flags(bus); | |
304 | ||
16be4368 KS |
305 | return 0; |
306 | } | |
307 | ||
b5dae4c7 LP |
308 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
309 | uint64_t new_flags; | |
310 | ||
16be4368 | 311 | assert_return(bus, -EINVAL); |
95c4fe82 | 312 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 313 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
314 | assert_return(!bus_pid_changed(bus), -ECHILD); |
315 | ||
b5dae4c7 LP |
316 | if (b) |
317 | bus->creds_mask |= mask; | |
318 | else | |
319 | bus->creds_mask &= ~mask; | |
320 | ||
49b832c5 | 321 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
322 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
323 | ||
324 | /* Make sure we don't lose the timestamp flag */ | |
325 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
326 | if (bus->attach_flags == new_flags) | |
327 | return 0; | |
49b832c5 | 328 | |
b5dae4c7 LP |
329 | bus->attach_flags = new_flags; |
330 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
331 | bus_kernel_realize_attach_flags(bus); | |
332 | ||
333 | return 0; | |
021a1e78 | 334 | } |
de1c301e | 335 | |
d9f644e2 | 336 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
337 | assert_return(bus, -EINVAL); |
338 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
339 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
340 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
341 | |
342 | bus->is_server = !!b; | |
98178d39 | 343 | bus->server_id = server_id; |
2181a7f5 LP |
344 | return 0; |
345 | } | |
346 | ||
d9f644e2 | 347 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
348 | assert_return(bus, -EINVAL); |
349 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
350 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
351 | |
352 | bus->anonymous_auth = !!b; | |
353 | return 0; | |
354 | } | |
355 | ||
adacb957 LP |
356 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
357 | assert_return(bus, -EINVAL); | |
358 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
359 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
360 | ||
361 | bus->trusted = !!b; | |
362 | return 0; | |
363 | } | |
364 | ||
455971c1 | 365 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 366 | assert_return(bus, -EINVAL); |
5972fe95 LP |
367 | assert_return(bus->state == BUS_UNSET, -EPERM); |
368 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
369 | ||
d1b91c99 | 370 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
371 | } |
372 | ||
c0765ddb LP |
373 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
374 | assert_return(bus, -EINVAL); | |
375 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
376 | ||
377 | bus->allow_interactive_authorization = !!b; | |
378 | return 0; | |
379 | } | |
380 | ||
381 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
382 | assert_return(bus, -EINVAL); | |
383 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
384 | ||
385 | return bus->allow_interactive_authorization; | |
386 | } | |
387 | ||
19070062 | 388 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 389 | const char *s; |
19070062 | 390 | sd_bus *bus; |
de1c301e LP |
391 | int r; |
392 | ||
19070062 LP |
393 | assert(reply); |
394 | bus = reply->bus; | |
de1c301e | 395 | assert(bus); |
c99c09a2 | 396 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 397 | |
40ca29a1 | 398 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
399 | if (r > 0) |
400 | return -r; | |
eb01ba5d | 401 | |
de1c301e LP |
402 | r = sd_bus_message_read(reply, "s", &s); |
403 | if (r < 0) | |
404 | return r; | |
405 | ||
dafb7591 LP |
406 | if (!service_name_is_valid(s) || s[0] != ':') |
407 | return -EBADMSG; | |
408 | ||
de1c301e LP |
409 | bus->unique_name = strdup(s); |
410 | if (!bus->unique_name) | |
411 | return -ENOMEM; | |
412 | ||
c99c09a2 LP |
413 | if (bus->state == BUS_HELLO) |
414 | bus->state = BUS_RUNNING; | |
dafb7591 | 415 | |
de1c301e LP |
416 | return 1; |
417 | } | |
418 | ||
419 | static int bus_send_hello(sd_bus *bus) { | |
4afd3348 | 420 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
de1c301e LP |
421 | int r; |
422 | ||
423 | assert(bus); | |
424 | ||
6629161f | 425 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
426 | return 0; |
427 | ||
de1c301e LP |
428 | r = sd_bus_message_new_method_call( |
429 | bus, | |
151b9b96 | 430 | &m, |
de1c301e | 431 | "org.freedesktop.DBus", |
a7639e37 | 432 | "/org/freedesktop/DBus", |
de1c301e | 433 | "org.freedesktop.DBus", |
151b9b96 | 434 | "Hello"); |
de1c301e LP |
435 | if (r < 0) |
436 | return r; | |
437 | ||
19befb2d | 438 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
439 | } |
440 | ||
a7e3212d | 441 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
442 | assert(bus); |
443 | ||
f08838da | 444 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 445 | bus->state = BUS_HELLO; |
e3017af9 | 446 | return 1; |
de1c301e LP |
447 | } |
448 | ||
449 | bus->state = BUS_RUNNING; | |
e3017af9 | 450 | return 1; |
de1c301e LP |
451 | } |
452 | ||
453 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 454 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
455 | const char *a; |
456 | char *r = NULL; | |
457 | ||
458 | assert(p); | |
459 | assert(*p); | |
de1c301e LP |
460 | assert(value); |
461 | ||
2fd9ae2e LP |
462 | if (key) { |
463 | l = strlen(key); | |
464 | if (strncmp(*p, key, l) != 0) | |
465 | return 0; | |
de1c301e | 466 | |
2fd9ae2e LP |
467 | if ((*p)[l] != '=') |
468 | return 0; | |
de1c301e | 469 | |
2fd9ae2e LP |
470 | if (*value) |
471 | return -EINVAL; | |
de1c301e | 472 | |
2fd9ae2e LP |
473 | a = *p + l + 1; |
474 | } else | |
475 | a = *p; | |
476 | ||
477 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 478 | char c; |
de1c301e LP |
479 | |
480 | if (*a == '%') { | |
481 | int x, y; | |
482 | ||
483 | x = unhexchar(a[1]); | |
484 | if (x < 0) { | |
485 | free(r); | |
486 | return x; | |
487 | } | |
488 | ||
489 | y = unhexchar(a[2]); | |
490 | if (y < 0) { | |
491 | free(r); | |
492 | return y; | |
493 | } | |
494 | ||
de1c301e | 495 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
496 | a += 3; |
497 | } else { | |
de1c301e | 498 | c = *a; |
89ffcd2a LP |
499 | a++; |
500 | } | |
de1c301e | 501 | |
821e0756 | 502 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 503 | return -ENOMEM; |
de1c301e | 504 | |
de1c301e LP |
505 | r[n++] = c; |
506 | } | |
507 | ||
89ffcd2a LP |
508 | if (!r) { |
509 | r = strdup(""); | |
510 | if (!r) | |
511 | return -ENOMEM; | |
512 | } else | |
513 | r[n] = 0; | |
514 | ||
515 | if (*a == ',') | |
516 | a++; | |
517 | ||
de1c301e | 518 | *p = a; |
2fd9ae2e LP |
519 | |
520 | free(*value); | |
de1c301e | 521 | *value = r; |
2fd9ae2e | 522 | |
de1c301e LP |
523 | return 1; |
524 | } | |
525 | ||
526 | static void skip_address_key(const char **p) { | |
527 | assert(p); | |
528 | assert(*p); | |
529 | ||
89ffcd2a LP |
530 | *p += strcspn(*p, ","); |
531 | ||
532 | if (**p == ',') | |
313cefa1 | 533 | (*p)++; |
de1c301e LP |
534 | } |
535 | ||
2fd9ae2e LP |
536 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
537 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
538 | size_t l; | |
de1c301e LP |
539 | int r; |
540 | ||
541 | assert(b); | |
2fd9ae2e LP |
542 | assert(p); |
543 | assert(*p); | |
544 | assert(guid); | |
de1c301e | 545 | |
2fd9ae2e LP |
546 | while (**p != 0 && **p != ';') { |
547 | r = parse_address_key(p, "guid", guid); | |
548 | if (r < 0) | |
549 | return r; | |
550 | else if (r > 0) | |
551 | continue; | |
de1c301e | 552 | |
2fd9ae2e LP |
553 | r = parse_address_key(p, "path", &path); |
554 | if (r < 0) | |
555 | return r; | |
556 | else if (r > 0) | |
557 | continue; | |
de1c301e | 558 | |
2fd9ae2e LP |
559 | r = parse_address_key(p, "abstract", &abstract); |
560 | if (r < 0) | |
561 | return r; | |
562 | else if (r > 0) | |
563 | continue; | |
de1c301e | 564 | |
2fd9ae2e LP |
565 | skip_address_key(p); |
566 | } | |
de1c301e | 567 | |
2fd9ae2e LP |
568 | if (!path && !abstract) |
569 | return -EINVAL; | |
de1c301e | 570 | |
2fd9ae2e LP |
571 | if (path && abstract) |
572 | return -EINVAL; | |
573 | ||
574 | if (path) { | |
575 | l = strlen(path); | |
576 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
577 | return -E2BIG; | |
de1c301e | 578 | |
2fd9ae2e LP |
579 | b->sockaddr.un.sun_family = AF_UNIX; |
580 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
581 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
582 | } else if (abstract) { | |
583 | l = strlen(abstract); | |
584 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
585 | return -E2BIG; | |
586 | ||
587 | b->sockaddr.un.sun_family = AF_UNIX; | |
588 | b->sockaddr.un.sun_path[0] = 0; | |
589 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
590 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
591 | } | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
597 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 598 | int r; |
b92bea5d ZJS |
599 | struct addrinfo *result, hints = { |
600 | .ai_socktype = SOCK_STREAM, | |
601 | .ai_flags = AI_ADDRCONFIG, | |
602 | }; | |
2fd9ae2e LP |
603 | |
604 | assert(b); | |
605 | assert(p); | |
606 | assert(*p); | |
607 | assert(guid); | |
608 | ||
609 | while (**p != 0 && **p != ';') { | |
610 | r = parse_address_key(p, "guid", guid); | |
611 | if (r < 0) | |
612 | return r; | |
613 | else if (r > 0) | |
614 | continue; | |
615 | ||
616 | r = parse_address_key(p, "host", &host); | |
617 | if (r < 0) | |
618 | return r; | |
619 | else if (r > 0) | |
620 | continue; | |
621 | ||
622 | r = parse_address_key(p, "port", &port); | |
623 | if (r < 0) | |
624 | return r; | |
625 | else if (r > 0) | |
626 | continue; | |
627 | ||
628 | r = parse_address_key(p, "family", &family); | |
629 | if (r < 0) | |
630 | return r; | |
631 | else if (r > 0) | |
632 | continue; | |
633 | ||
634 | skip_address_key(p); | |
635 | } | |
636 | ||
637 | if (!host || !port) | |
638 | return -EINVAL; | |
639 | ||
2fd9ae2e LP |
640 | if (family) { |
641 | if (streq(family, "ipv4")) | |
642 | hints.ai_family = AF_INET; | |
643 | else if (streq(family, "ipv6")) | |
644 | hints.ai_family = AF_INET6; | |
645 | else | |
646 | return -EINVAL; | |
647 | } | |
648 | ||
649 | r = getaddrinfo(host, port, &hints, &result); | |
650 | if (r == EAI_SYSTEM) | |
651 | return -errno; | |
652 | else if (r != 0) | |
653 | return -EADDRNOTAVAIL; | |
654 | ||
655 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
656 | b->sockaddr_size = result->ai_addrlen; | |
657 | ||
658 | freeaddrinfo(result); | |
659 | ||
660 | return 0; | |
661 | } | |
662 | ||
663 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
664 | char *path = NULL; | |
665 | unsigned n_argv = 0, j; | |
666 | char **argv = NULL; | |
821e0756 | 667 | size_t allocated = 0; |
2fd9ae2e LP |
668 | int r; |
669 | ||
670 | assert(b); | |
671 | assert(p); | |
672 | assert(*p); | |
673 | assert(guid); | |
674 | ||
675 | while (**p != 0 && **p != ';') { | |
676 | r = parse_address_key(p, "guid", guid); | |
677 | if (r < 0) | |
678 | goto fail; | |
679 | else if (r > 0) | |
680 | continue; | |
681 | ||
682 | r = parse_address_key(p, "path", &path); | |
683 | if (r < 0) | |
684 | goto fail; | |
685 | else if (r > 0) | |
686 | continue; | |
687 | ||
688 | if (startswith(*p, "argv")) { | |
689 | unsigned ul; | |
690 | ||
691 | errno = 0; | |
692 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 693 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
694 | r = -EINVAL; |
695 | goto fail; | |
696 | } | |
697 | ||
313cefa1 | 698 | (*p)++; |
2fd9ae2e LP |
699 | |
700 | if (ul >= n_argv) { | |
821e0756 | 701 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
702 | r = -ENOMEM; |
703 | goto fail; | |
704 | } | |
705 | ||
2fd9ae2e LP |
706 | n_argv = ul + 1; |
707 | } | |
708 | ||
709 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 710 | if (r < 0) |
2fd9ae2e | 711 | goto fail; |
de1c301e | 712 | |
2fd9ae2e | 713 | continue; |
de1c301e LP |
714 | } |
715 | ||
2fd9ae2e LP |
716 | skip_address_key(p); |
717 | } | |
de1c301e | 718 | |
5a0f6033 LP |
719 | if (!path) { |
720 | r = -EINVAL; | |
2fd9ae2e | 721 | goto fail; |
5a0f6033 | 722 | } |
de1c301e | 723 | |
2fd9ae2e LP |
724 | /* Make sure there are no holes in the array, with the |
725 | * exception of argv[0] */ | |
726 | for (j = 1; j < n_argv; j++) | |
727 | if (!argv[j]) { | |
728 | r = -EINVAL; | |
729 | goto fail; | |
730 | } | |
731 | ||
732 | if (argv && argv[0] == NULL) { | |
733 | argv[0] = strdup(path); | |
734 | if (!argv[0]) { | |
735 | r = -ENOMEM; | |
736 | goto fail; | |
737 | } | |
738 | } | |
de1c301e | 739 | |
2fd9ae2e LP |
740 | b->exec_path = path; |
741 | b->exec_argv = argv; | |
742 | return 0; | |
de1c301e | 743 | |
2fd9ae2e LP |
744 | fail: |
745 | for (j = 0; j < n_argv; j++) | |
746 | free(argv[j]); | |
747 | ||
748 | free(argv); | |
749 | free(path); | |
750 | return r; | |
751 | } | |
752 | ||
6629161f LP |
753 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
754 | _cleanup_free_ char *path = NULL; | |
755 | int r; | |
756 | ||
757 | assert(b); | |
758 | assert(p); | |
759 | assert(*p); | |
760 | assert(guid); | |
761 | ||
762 | while (**p != 0 && **p != ';') { | |
763 | r = parse_address_key(p, "guid", guid); | |
764 | if (r < 0) | |
765 | return r; | |
766 | else if (r > 0) | |
767 | continue; | |
768 | ||
769 | r = parse_address_key(p, "path", &path); | |
770 | if (r < 0) | |
771 | return r; | |
772 | else if (r > 0) | |
773 | continue; | |
774 | ||
775 | skip_address_key(p); | |
776 | } | |
777 | ||
778 | if (!path) | |
779 | return -EINVAL; | |
780 | ||
781 | free(b->kernel); | |
782 | b->kernel = path; | |
783 | path = NULL; | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
bc9fd78c | 788 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 789 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
790 | int r; |
791 | ||
792 | assert(b); | |
793 | assert(p); | |
794 | assert(*p); | |
795 | assert(guid); | |
796 | ||
797 | while (**p != 0 && **p != ';') { | |
798 | r = parse_address_key(p, "guid", guid); | |
799 | if (r < 0) | |
800 | return r; | |
801 | else if (r > 0) | |
802 | continue; | |
803 | ||
804 | r = parse_address_key(p, "machine", &machine); | |
805 | if (r < 0) | |
806 | return r; | |
807 | else if (r > 0) | |
808 | continue; | |
809 | ||
ee502e0c LP |
810 | r = parse_address_key(p, "pid", &pid); |
811 | if (r < 0) | |
812 | return r; | |
813 | else if (r > 0) | |
814 | continue; | |
815 | ||
a7893c6b LP |
816 | skip_address_key(p); |
817 | } | |
818 | ||
ee502e0c | 819 | if (!machine == !pid) |
a7893c6b LP |
820 | return -EINVAL; |
821 | ||
ee502e0c LP |
822 | if (machine) { |
823 | if (!machine_name_is_valid(machine)) | |
824 | return -EINVAL; | |
b6741478 | 825 | |
ee502e0c LP |
826 | free(b->machine); |
827 | b->machine = machine; | |
828 | machine = NULL; | |
829 | } else { | |
a1e58e8e | 830 | b->machine = mfree(b->machine); |
ee502e0c LP |
831 | } |
832 | ||
833 | if (pid) { | |
834 | r = parse_pid(pid, &b->nspid); | |
835 | if (r < 0) | |
836 | return r; | |
837 | } else | |
838 | b->nspid = 0; | |
a7893c6b LP |
839 | |
840 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
841 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
842 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
843 | |
844 | return 0; | |
845 | } | |
846 | ||
bc9fd78c | 847 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 848 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
849 | int r; |
850 | ||
851 | assert(b); | |
852 | assert(p); | |
853 | assert(*p); | |
854 | assert(guid); | |
855 | ||
856 | while (**p != 0 && **p != ';') { | |
857 | r = parse_address_key(p, "guid", guid); | |
858 | if (r < 0) | |
859 | return r; | |
860 | else if (r > 0) | |
861 | continue; | |
862 | ||
863 | r = parse_address_key(p, "machine", &machine); | |
864 | if (r < 0) | |
865 | return r; | |
866 | else if (r > 0) | |
867 | continue; | |
868 | ||
ee502e0c LP |
869 | r = parse_address_key(p, "pid", &pid); |
870 | if (r < 0) | |
871 | return r; | |
872 | else if (r > 0) | |
873 | continue; | |
874 | ||
bc9fd78c LP |
875 | skip_address_key(p); |
876 | } | |
877 | ||
ee502e0c | 878 | if (!machine == !pid) |
bc9fd78c LP |
879 | return -EINVAL; |
880 | ||
ee502e0c LP |
881 | if (machine) { |
882 | if (!machine_name_is_valid(machine)) | |
883 | return -EINVAL; | |
bc9fd78c | 884 | |
ee502e0c LP |
885 | free(b->machine); |
886 | b->machine = machine; | |
887 | machine = NULL; | |
888 | } else { | |
a1e58e8e | 889 | b->machine = mfree(b->machine); |
ee502e0c LP |
890 | } |
891 | ||
892 | if (pid) { | |
893 | r = parse_pid(pid, &b->nspid); | |
894 | if (r < 0) | |
895 | return r; | |
896 | } else | |
897 | b->nspid = 0; | |
bc9fd78c | 898 | |
2fc09a9c DM |
899 | r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); |
900 | if (r < 0) | |
901 | return r; | |
bc9fd78c LP |
902 | |
903 | return 0; | |
904 | } | |
905 | ||
2fd9ae2e LP |
906 | static void bus_reset_parsed_address(sd_bus *b) { |
907 | assert(b); | |
908 | ||
909 | zero(b->sockaddr); | |
910 | b->sockaddr_size = 0; | |
ba243e51 NK |
911 | b->exec_argv = strv_free(b->exec_argv); |
912 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 913 | b->server_id = SD_ID128_NULL; |
ba243e51 NK |
914 | b->kernel = mfree(b->kernel); |
915 | b->machine = mfree(b->machine); | |
ee502e0c | 916 | b->nspid = 0; |
2fd9ae2e LP |
917 | } |
918 | ||
919 | static int bus_parse_next_address(sd_bus *b) { | |
920 | _cleanup_free_ char *guid = NULL; | |
921 | const char *a; | |
922 | int r; | |
923 | ||
924 | assert(b); | |
925 | ||
926 | if (!b->address) | |
927 | return 0; | |
928 | if (b->address[b->address_index] == 0) | |
929 | return 0; | |
930 | ||
931 | bus_reset_parsed_address(b); | |
932 | ||
933 | a = b->address + b->address_index; | |
de1c301e | 934 | |
2fd9ae2e | 935 | while (*a != 0) { |
de1c301e | 936 | |
2fd9ae2e LP |
937 | if (*a == ';') { |
938 | a++; | |
939 | continue; | |
de1c301e LP |
940 | } |
941 | ||
2fd9ae2e LP |
942 | if (startswith(a, "unix:")) { |
943 | a += 5; | |
de1c301e | 944 | |
2fd9ae2e | 945 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
946 | if (r < 0) |
947 | return r; | |
2fd9ae2e | 948 | break; |
de1c301e | 949 | |
2fd9ae2e | 950 | } else if (startswith(a, "tcp:")) { |
de1c301e | 951 | |
2fd9ae2e LP |
952 | a += 4; |
953 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
954 | if (r < 0) |
955 | return r; | |
de1c301e | 956 | |
2fd9ae2e LP |
957 | break; |
958 | ||
959 | } else if (startswith(a, "unixexec:")) { | |
960 | ||
961 | a += 9; | |
962 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
963 | if (r < 0) |
964 | return r; | |
de1c301e | 965 | |
2fd9ae2e | 966 | break; |
de1c301e | 967 | |
6629161f LP |
968 | } else if (startswith(a, "kernel:")) { |
969 | ||
970 | a += 7; | |
971 | r = parse_kernel_address(b, &a, &guid); | |
972 | if (r < 0) | |
973 | return r; | |
974 | ||
a7893c6b | 975 | break; |
de33fc62 | 976 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 977 | |
146d4773 | 978 | a += 15; |
bc9fd78c LP |
979 | r = parse_container_unix_address(b, &a, &guid); |
980 | if (r < 0) | |
981 | return r; | |
982 | ||
983 | break; | |
de33fc62 | 984 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 985 | |
146d4773 | 986 | a += 17; |
bc9fd78c | 987 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
988 | if (r < 0) |
989 | return r; | |
990 | ||
6629161f | 991 | break; |
de1c301e LP |
992 | } |
993 | ||
2fd9ae2e LP |
994 | a = strchr(a, ';'); |
995 | if (!a) | |
996 | return 0; | |
de1c301e LP |
997 | } |
998 | ||
999 | if (guid) { | |
98178d39 | 1000 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
1001 | if (r < 0) |
1002 | return r; | |
1003 | } | |
1004 | ||
2fd9ae2e | 1005 | b->address_index = a - b->address; |
de1c301e LP |
1006 | return 1; |
1007 | } | |
1008 | ||
a7e3212d | 1009 | static int bus_start_address(sd_bus *b) { |
15442912 DH |
1010 | bool container_kdbus_available = false; |
1011 | bool kdbus_available = false; | |
2fd9ae2e LP |
1012 | int r; |
1013 | ||
1014 | assert(b); | |
1015 | ||
1016 | for (;;) { | |
1e05d493 | 1017 | bool skipped = false; |
2fd9ae2e | 1018 | |
1e05d493 | 1019 | bus_close_fds(b); |
a7e3212d | 1020 | |
15442912 DH |
1021 | /* |
1022 | * Usually, if you provide multiple different bus-addresses, we | |
1023 | * try all of them in order. We use the first one that | |
1024 | * succeeds. However, if you mix kernel and unix addresses, we | |
1025 | * never try unix-addresses if a previous kernel address was | |
1026 | * tried and kdbus was available. This is required to prevent | |
1027 | * clients to fallback to the bus-proxy if kdbus is available | |
1028 | * but failed (eg., too many connections). | |
1029 | */ | |
1030 | ||
1e05d493 | 1031 | if (b->exec_path) |
a7893c6b | 1032 | r = bus_socket_exec(b); |
15442912 | 1033 | else if ((b->nspid > 0 || b->machine) && b->kernel) { |
bc9fd78c | 1034 | r = bus_container_connect_kernel(b); |
15442912 DH |
1035 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1036 | container_kdbus_available = true; | |
751090cc LP |
1037 | |
1038 | } else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1039 | if (!container_kdbus_available) | |
1040 | r = bus_container_connect_socket(b); | |
1041 | else | |
1042 | skipped = true; | |
1043 | ||
1044 | } else if (b->kernel) { | |
a7893c6b | 1045 | r = bus_kernel_connect(b); |
15442912 DH |
1046 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1047 | kdbus_available = true; | |
751090cc LP |
1048 | |
1049 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1050 | if (!kdbus_available) | |
1051 | r = bus_socket_connect(b); | |
1052 | else | |
1053 | skipped = true; | |
751090cc | 1054 | } else |
1e05d493 LP |
1055 | skipped = true; |
1056 | ||
1057 | if (!skipped) { | |
1058 | if (r >= 0) { | |
1059 | r = attach_io_events(b); | |
1060 | if (r >= 0) | |
1061 | return r; | |
1062 | } | |
6629161f | 1063 | |
2fd9ae2e LP |
1064 | b->last_connect_error = -r; |
1065 | } | |
1066 | ||
1067 | r = bus_parse_next_address(b); | |
1068 | if (r < 0) | |
1069 | return r; | |
1070 | if (r == 0) | |
1071 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1072 | } |
1073 | } | |
1074 | ||
a7e3212d LP |
1075 | int bus_next_address(sd_bus *b) { |
1076 | assert(b); | |
1077 | ||
1078 | bus_reset_parsed_address(b); | |
1079 | return bus_start_address(b); | |
1080 | } | |
1081 | ||
021a1e78 | 1082 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1083 | struct stat st; |
021a1e78 LP |
1084 | int r; |
1085 | ||
1086 | assert(b); | |
e82c9509 LP |
1087 | assert(b->input_fd >= 0); |
1088 | assert(b->output_fd >= 0); | |
021a1e78 | 1089 | |
e82c9509 | 1090 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1091 | if (r < 0) |
1092 | return r; | |
1093 | ||
e82c9509 | 1094 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1095 | if (r < 0) |
1096 | return r; | |
1097 | ||
e82c9509 LP |
1098 | if (b->input_fd != b->output_fd) { |
1099 | r = fd_nonblock(b->output_fd, true); | |
1100 | if (r < 0) | |
1101 | return r; | |
1102 | ||
1103 | r = fd_cloexec(b->output_fd, true); | |
1104 | if (r < 0) | |
1105 | return r; | |
1106 | } | |
1107 | ||
6629161f LP |
1108 | if (fstat(b->input_fd, &st) < 0) |
1109 | return -errno; | |
1110 | ||
1111 | if (S_ISCHR(b->input_fd)) | |
1112 | return bus_kernel_take_fd(b); | |
1113 | else | |
1114 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1115 | } |
1116 | ||
d9f644e2 | 1117 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1118 | int r; |
1119 | ||
d6888822 LP |
1120 | assert_return(bus, -EINVAL); |
1121 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1122 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1123 | |
1124 | bus->state = BUS_OPENING; | |
1125 | ||
2181a7f5 LP |
1126 | if (bus->is_server && bus->bus_client) |
1127 | return -EINVAL; | |
1128 | ||
e82c9509 | 1129 | if (bus->input_fd >= 0) |
021a1e78 | 1130 | r = bus_start_fd(bus); |
a7893c6b | 1131 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1132 | r = bus_start_address(bus); |
021a1e78 LP |
1133 | else |
1134 | return -EINVAL; | |
1135 | ||
db9bb83f LP |
1136 | if (r < 0) { |
1137 | sd_bus_close(bus); | |
021a1e78 | 1138 | return r; |
db9bb83f | 1139 | } |
021a1e78 LP |
1140 | |
1141 | return bus_send_hello(bus); | |
1142 | } | |
1143 | ||
af08d2f9 LP |
1144 | _public_ int sd_bus_open(sd_bus **ret) { |
1145 | const char *e; | |
1146 | sd_bus *b; | |
1147 | int r; | |
1148 | ||
1149 | assert_return(ret, -EINVAL); | |
1150 | ||
1151 | /* Let's connect to the starter bus if it is set, and | |
1152 | * otherwise to the bus that is appropropriate for the scope | |
1153 | * we are running in */ | |
1154 | ||
1155 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1156 | if (e) { | |
1157 | if (streq(e, "system")) | |
1158 | return sd_bus_open_system(ret); | |
09365592 | 1159 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1160 | return sd_bus_open_user(ret); |
1161 | } | |
1162 | ||
1163 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1164 | if (!e) { | |
1165 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1166 | return sd_bus_open_user(ret); | |
1167 | else | |
1168 | return sd_bus_open_system(ret); | |
1169 | } | |
1170 | ||
1171 | r = sd_bus_new(&b); | |
1172 | if (r < 0) | |
1173 | return r; | |
1174 | ||
1175 | r = sd_bus_set_address(b, e); | |
1176 | if (r < 0) | |
1177 | goto fail; | |
1178 | ||
1179 | b->bus_client = true; | |
1180 | ||
1181 | /* We don't know whether the bus is trusted or not, so better | |
1182 | * be safe, and authenticate everything */ | |
1183 | b->trusted = false; | |
cf226cfc LP |
1184 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1185 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1186 | |
1187 | r = sd_bus_start(b); | |
1188 | if (r < 0) | |
1189 | goto fail; | |
1190 | ||
1191 | *ret = b; | |
1192 | return 0; | |
1193 | ||
1194 | fail: | |
1195 | bus_free(b); | |
1196 | return r; | |
1197 | } | |
1198 | ||
09365592 | 1199 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1200 | const char *e; |
09365592 LP |
1201 | assert(b); |
1202 | ||
1203 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1204 | if (e) | |
1205 | return sd_bus_set_address(b, e); | |
1206 | ||
057171ef | 1207 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1208 | } |
1209 | ||
1210 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1211 | sd_bus *b; |
1212 | int r; | |
1213 | ||
d6888822 | 1214 | assert_return(ret, -EINVAL); |
de1c301e | 1215 | |
021a1e78 LP |
1216 | r = sd_bus_new(&b); |
1217 | if (r < 0) | |
1218 | return r; | |
1219 | ||
09365592 | 1220 | r = bus_set_address_system(b); |
e3dd987c LP |
1221 | if (r < 0) |
1222 | goto fail; | |
de1c301e | 1223 | |
94bbf1ba | 1224 | b->bus_client = true; |
5972fe95 | 1225 | b->is_system = true; |
021a1e78 | 1226 | |
adacb957 LP |
1227 | /* Let's do per-method access control on the system bus. We |
1228 | * need the caller's UID and capability set for that. */ | |
1229 | b->trusted = false; | |
1230 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1231 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1232 | |
021a1e78 LP |
1233 | r = sd_bus_start(b); |
1234 | if (r < 0) | |
1235 | goto fail; | |
de1c301e LP |
1236 | |
1237 | *ret = b; | |
1238 | return 0; | |
021a1e78 LP |
1239 | |
1240 | fail: | |
1241 | bus_free(b); | |
1242 | return r; | |
de1c301e LP |
1243 | } |
1244 | ||
09365592 | 1245 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1246 | const char *e; |
64ce4ad7 DH |
1247 | uid_t uid; |
1248 | int r; | |
de1c301e | 1249 | |
09365592 | 1250 | assert(b); |
021a1e78 | 1251 | |
6c03089c | 1252 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1253 | if (e) |
1254 | return sd_bus_set_address(b, e); | |
1255 | ||
64ce4ad7 DH |
1256 | r = cg_pid_get_owner_uid(0, &uid); |
1257 | if (r < 0) | |
1258 | uid = getuid(); | |
1259 | ||
09365592 | 1260 | e = secure_getenv("XDG_RUNTIME_DIR"); |
057171ef | 1261 | if (e) { |
09365592 | 1262 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1263 | |
09365592 LP |
1264 | ee = bus_address_escape(e); |
1265 | if (!ee) | |
1266 | return -ENOMEM; | |
e3dd987c | 1267 | |
64ce4ad7 | 1268 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, uid, ee); |
057171ef | 1269 | } else |
64ce4ad7 | 1270 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, uid); |
de1c301e | 1271 | |
09365592 LP |
1272 | if (!b->address) |
1273 | return -ENOMEM; | |
1274 | ||
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1279 | sd_bus *b; | |
1280 | int r; | |
1281 | ||
1282 | assert_return(ret, -EINVAL); | |
1283 | ||
1284 | r = sd_bus_new(&b); | |
1285 | if (r < 0) | |
1286 | return r; | |
1287 | ||
1288 | r = bus_set_address_user(b); | |
1289 | if (r < 0) | |
1290 | return r; | |
1291 | ||
94bbf1ba | 1292 | b->bus_client = true; |
5972fe95 | 1293 | b->is_user = true; |
de1c301e | 1294 | |
adacb957 LP |
1295 | /* We don't do any per-method access control on the user |
1296 | * bus. */ | |
1297 | b->trusted = true; | |
1298 | ||
021a1e78 | 1299 | r = sd_bus_start(b); |
2571ead1 LP |
1300 | if (r < 0) |
1301 | goto fail; | |
de1c301e LP |
1302 | |
1303 | *ret = b; | |
1304 | return 0; | |
2571ead1 LP |
1305 | |
1306 | fail: | |
021a1e78 | 1307 | bus_free(b); |
2571ead1 | 1308 | return r; |
de1c301e LP |
1309 | } |
1310 | ||
09365592 | 1311 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1312 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1313 | char *m = NULL, *c = NULL; |
0f8bd8de | 1314 | |
09365592 LP |
1315 | assert(b); |
1316 | assert(host); | |
0f8bd8de | 1317 | |
7f0d207d LP |
1318 | /* Let's see if we shall enter some container */ |
1319 | m = strchr(host, ':'); | |
1320 | if (m) { | |
1321 | m++; | |
1322 | ||
1323 | /* Let's make sure this is not a port of some kind, | |
1324 | * and is a valid machine name. */ | |
1325 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1326 | char *t; | |
1327 | ||
1328 | /* Cut out the host part */ | |
1329 | t = strndupa(host, m - host - 1); | |
1330 | e = bus_address_escape(t); | |
1331 | if (!e) | |
1332 | return -ENOMEM; | |
1333 | ||
63c372cb | 1334 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1335 | } |
1336 | } | |
1337 | ||
1338 | if (!e) { | |
1339 | e = bus_address_escape(host); | |
1340 | if (!e) | |
1341 | return -ENOMEM; | |
1342 | } | |
0f8bd8de | 1343 | |
7f0d207d | 1344 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1345 | if (!b->address) |
0f8bd8de | 1346 | return -ENOMEM; |
a7893c6b | 1347 | |
09365592 LP |
1348 | return 0; |
1349 | } | |
1350 | ||
1351 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1352 | sd_bus *bus; | |
1353 | int r; | |
1354 | ||
1355 | assert_return(host, -EINVAL); | |
1356 | assert_return(ret, -EINVAL); | |
1357 | ||
a7893c6b | 1358 | r = sd_bus_new(&bus); |
09365592 | 1359 | if (r < 0) |
a7893c6b | 1360 | return r; |
a7893c6b | 1361 | |
09365592 LP |
1362 | r = bus_set_address_system_remote(bus, host); |
1363 | if (r < 0) | |
1364 | goto fail; | |
1365 | ||
a7893c6b | 1366 | bus->bus_client = true; |
09365592 | 1367 | bus->trusted = false; |
3acc1daf | 1368 | bus->is_system = true; |
a7893c6b LP |
1369 | |
1370 | r = sd_bus_start(bus); | |
09365592 LP |
1371 | if (r < 0) |
1372 | goto fail; | |
a7893c6b LP |
1373 | |
1374 | *ret = bus; | |
1375 | return 0; | |
09365592 LP |
1376 | |
1377 | fail: | |
1378 | bus_free(bus); | |
1379 | return r; | |
a7893c6b LP |
1380 | } |
1381 | ||
de33fc62 | 1382 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1383 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1384 | |
09365592 LP |
1385 | assert(b); |
1386 | assert(machine); | |
a7893c6b LP |
1387 | |
1388 | e = bus_address_escape(machine); | |
1389 | if (!e) | |
1390 | return -ENOMEM; | |
1391 | ||
de33fc62 | 1392 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
09365592 | 1393 | if (!b->address) |
a7893c6b | 1394 | return -ENOMEM; |
0f8bd8de | 1395 | |
09365592 LP |
1396 | return 0; |
1397 | } | |
1398 | ||
de33fc62 | 1399 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1400 | sd_bus *bus; |
1401 | int r; | |
1402 | ||
1403 | assert_return(machine, -EINVAL); | |
1404 | assert_return(ret, -EINVAL); | |
affcf189 | 1405 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1406 | |
0f8bd8de | 1407 | r = sd_bus_new(&bus); |
09365592 | 1408 | if (r < 0) |
0f8bd8de | 1409 | return r; |
0f8bd8de | 1410 | |
de33fc62 | 1411 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1412 | if (r < 0) |
1413 | goto fail; | |
1414 | ||
0f8bd8de | 1415 | bus->bus_client = true; |
09365592 | 1416 | bus->trusted = false; |
3acc1daf | 1417 | bus->is_system = true; |
0f8bd8de LP |
1418 | |
1419 | r = sd_bus_start(bus); | |
09365592 LP |
1420 | if (r < 0) |
1421 | goto fail; | |
0f8bd8de LP |
1422 | |
1423 | *ret = bus; | |
1424 | return 0; | |
09365592 LP |
1425 | |
1426 | fail: | |
1427 | bus_free(bus); | |
1428 | return r; | |
0f8bd8de LP |
1429 | } |
1430 | ||
d9f644e2 | 1431 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1432 | |
de1c301e LP |
1433 | if (!bus) |
1434 | return; | |
d5a2b9a6 LP |
1435 | if (bus->state == BUS_CLOSED) |
1436 | return; | |
1437 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1438 | return; |
1439 | ||
1440 | bus->state = BUS_CLOSED; | |
e82c9509 | 1441 | |
40ca29a1 LP |
1442 | sd_bus_detach_event(bus); |
1443 | ||
0e586eae LP |
1444 | /* Drop all queued messages so that they drop references to |
1445 | * the bus object and the bus may be freed */ | |
1446 | bus_reset_queues(bus); | |
1447 | ||
f54514f3 LP |
1448 | if (!bus->is_kernel) |
1449 | bus_close_fds(bus); | |
1450 | ||
1451 | /* We'll leave the fd open in case this is a kernel bus, since | |
1452 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1453 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1454 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1455 | } |
1456 | ||
03976f7b LP |
1457 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1458 | ||
1459 | if (!bus) | |
1460 | return NULL; | |
1461 | ||
1462 | sd_bus_flush(bus); | |
1463 | sd_bus_close(bus); | |
1464 | ||
1465 | return sd_bus_unref(bus); | |
1466 | } | |
1467 | ||
718db961 LP |
1468 | static void bus_enter_closing(sd_bus *bus) { |
1469 | assert(bus); | |
1470 | ||
1471 | if (bus->state != BUS_OPENING && | |
1472 | bus->state != BUS_AUTHENTICATING && | |
1473 | bus->state != BUS_HELLO && | |
1474 | bus->state != BUS_RUNNING) | |
1475 | return; | |
1476 | ||
1477 | bus->state = BUS_CLOSING; | |
1478 | } | |
1479 | ||
d9f644e2 | 1480 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
4afd3348 LP |
1481 | |
1482 | if (!bus) | |
1483 | return NULL; | |
de1c301e | 1484 | |
e4ee6e5c | 1485 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1486 | |
de1c301e LP |
1487 | return bus; |
1488 | } | |
1489 | ||
d9f644e2 | 1490 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1491 | unsigned i; |
5b1bc83f LP |
1492 | |
1493 | if (!bus) | |
1494 | return NULL; | |
de1c301e | 1495 | |
f389bf15 LP |
1496 | i = REFCNT_DEC(bus->n_ref); |
1497 | if (i > 0) | |
1498 | return NULL; | |
1499 | ||
1500 | bus_free(bus); | |
de1c301e LP |
1501 | return NULL; |
1502 | } | |
1503 | ||
d9f644e2 | 1504 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1505 | |
1506 | assert_return(bus, -EINVAL); | |
1507 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1508 | |
f54514f3 | 1509 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1510 | } |
1511 | ||
d9f644e2 | 1512 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1513 | int r; |
1514 | ||
d6888822 LP |
1515 | assert_return(bus, -EINVAL); |
1516 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1517 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1518 | |
09365592 LP |
1519 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1520 | return 0; | |
1521 | ||
d728d708 | 1522 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1523 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1524 | return 0; |
1525 | ||
20902f3e | 1526 | r = bus_ensure_running(bus); |
d728d708 LP |
1527 | if (r < 0) |
1528 | return r; | |
de1c301e | 1529 | |
d728d708 LP |
1530 | return bus->can_fds; |
1531 | } | |
1532 | ||
1533 | return bus_type_is_valid(type); | |
de1c301e LP |
1534 | } |
1535 | ||
5c302692 | 1536 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1537 | int r; |
de1c301e | 1538 | |
d6888822 | 1539 | assert_return(bus, -EINVAL); |
f7fce345 | 1540 | assert_return(id, -EINVAL); |
d6888822 | 1541 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1542 | |
20902f3e | 1543 | r = bus_ensure_running(bus); |
d728d708 LP |
1544 | if (r < 0) |
1545 | return r; | |
de1c301e | 1546 | |
f7fce345 | 1547 | *id = bus->server_id; |
d728d708 | 1548 | return 0; |
de1c301e LP |
1549 | } |
1550 | ||
3df7a7e6 | 1551 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1552 | assert(b); |
de1c301e LP |
1553 | assert(m); |
1554 | ||
aea93deb LP |
1555 | if (m->sealed) { |
1556 | /* If we copy the same message to multiple | |
693eb9a2 | 1557 | * destinations, avoid using the same cookie |
aea93deb | 1558 | * numbers. */ |
693eb9a2 | 1559 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1560 | return 0; |
aea93deb | 1561 | } |
de1c301e | 1562 | |
3df7a7e6 LP |
1563 | if (timeout == 0) |
1564 | timeout = BUS_DEFAULT_TIMEOUT; | |
1565 | ||
693eb9a2 | 1566 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1567 | } |
1568 | ||
e1c433c6 | 1569 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1570 | bool remarshal = false; |
1571 | ||
e1c433c6 LP |
1572 | assert(b); |
1573 | ||
908b8a42 DH |
1574 | /* wrong packet version */ |
1575 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1576 | remarshal = true; | |
1577 | ||
1578 | /* wrong packet endianness */ | |
1579 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1580 | remarshal = true; | |
1581 | ||
1582 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1583 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1584 | * force remarshaling of the message. Technically, we could just | |
1585 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1586 | * the message refer to m->kdbus already. This should be fixed! */ | |
1587 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1588 | remarshal = true; | |
e1c433c6 | 1589 | |
908b8a42 | 1590 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1591 | } |
1592 | ||
7adc46fc LP |
1593 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1594 | assert(b); | |
1595 | assert(m); | |
1596 | ||
52cd5877 LP |
1597 | /* Fake some timestamps, if they were requested, and not |
1598 | * already initialized */ | |
1599 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1600 | if (m->realtime <= 0) | |
1601 | m->realtime = now(CLOCK_REALTIME); | |
1602 | ||
1603 | if (m->monotonic <= 0) | |
1604 | m->monotonic = now(CLOCK_MONOTONIC); | |
1605 | } | |
1606 | ||
7adc46fc LP |
1607 | /* The bus specification says the serial number cannot be 0, |
1608 | * hence let's fill something in for synthetic messages. Since | |
1609 | * synthetic messages might have a fake sender and we don't | |
1610 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1611 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1612 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1613 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1614 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1615 | } |
1616 | ||
069f5e61 | 1617 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1618 | int r; |
1619 | ||
718db961 | 1620 | assert(bus); |
2e3db52d | 1621 | assert(m); |
718db961 LP |
1622 | |
1623 | if (bus->is_kernel) | |
069f5e61 | 1624 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1625 | else |
2e3db52d LP |
1626 | r = bus_socket_write_message(bus, m, idx); |
1627 | ||
1628 | if (r <= 0) | |
1629 | return r; | |
1630 | ||
90911bb6 | 1631 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1632 | 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 |
1633 | bus_message_type_to_string(m->header->type), |
1634 | strna(sd_bus_message_get_sender(m)), | |
1635 | strna(sd_bus_message_get_destination(m)), | |
1636 | strna(sd_bus_message_get_path(m)), | |
1637 | strna(sd_bus_message_get_interface(m)), | |
1638 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1639 | BUS_MESSAGE_COOKIE(m), |
1640 | m->reply_cookie, | |
2e3db52d LP |
1641 | strna(m->error.message)); |
1642 | ||
1643 | return r; | |
718db961 LP |
1644 | } |
1645 | ||
de1c301e | 1646 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1647 | int r, ret = 0; |
de1c301e LP |
1648 | |
1649 | assert(bus); | |
89ffcd2a | 1650 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1651 | |
de1c301e LP |
1652 | while (bus->wqueue_size > 0) { |
1653 | ||
069f5e61 | 1654 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1655 | if (r < 0) |
de1c301e | 1656 | return r; |
718db961 | 1657 | else if (r == 0) |
e3017af9 LP |
1658 | /* Didn't do anything this time */ |
1659 | return ret; | |
6629161f | 1660 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1661 | /* Fully written. Let's drop the entry from |
1662 | * the queue. | |
1663 | * | |
1664 | * This isn't particularly optimized, but | |
1665 | * well, this is supposed to be our worst-case | |
1666 | * buffer only, and the socket buffer is | |
1667 | * supposed to be our primary buffer, and if | |
1668 | * it got full, then all bets are off | |
1669 | * anyway. */ | |
1670 | ||
313cefa1 | 1671 | bus->wqueue_size--; |
c4e6e242 | 1672 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1673 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1674 | bus->windex = 0; | |
1675 | ||
e3017af9 | 1676 | ret = 1; |
de1c301e LP |
1677 | } |
1678 | } | |
1679 | ||
e3017af9 | 1680 | return ret; |
de1c301e LP |
1681 | } |
1682 | ||
766c5809 | 1683 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1684 | assert(bus); |
1685 | ||
1686 | if (bus->is_kernel) | |
766c5809 | 1687 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1688 | else |
1689 | return bus_socket_read_message(bus); | |
1690 | } | |
1691 | ||
7adc46fc | 1692 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1693 | assert(bus); |
7d22c717 | 1694 | |
821e0756 | 1695 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1696 | return -ENOBUFS; |
1697 | ||
821e0756 | 1698 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1699 | return -ENOMEM; |
1700 | ||
7d22c717 LP |
1701 | return 0; |
1702 | } | |
1703 | ||
766c5809 | 1704 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1705 | int r, ret = 0; |
de1c301e LP |
1706 | |
1707 | assert(bus); | |
1708 | assert(m); | |
89ffcd2a | 1709 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1710 | |
766c5809 LP |
1711 | /* Note that the priority logic is only available on kdbus, |
1712 | * where the rqueue is unused. We check the rqueue here | |
1713 | * anyway, because it's simple... */ | |
1714 | ||
7d22c717 LP |
1715 | for (;;) { |
1716 | if (bus->rqueue_size > 0) { | |
1717 | /* Dispatch a queued message */ | |
de1c301e | 1718 | |
7d22c717 | 1719 | *m = bus->rqueue[0]; |
313cefa1 | 1720 | bus->rqueue_size--; |
7d22c717 LP |
1721 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); |
1722 | return 1; | |
1723 | } | |
de1c301e | 1724 | |
7d22c717 | 1725 | /* Try to read a new message */ |
766c5809 | 1726 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1727 | if (r < 0) |
e3017af9 | 1728 | return r; |
e3017af9 LP |
1729 | if (r == 0) |
1730 | return ret; | |
de1c301e | 1731 | |
2e8d788c | 1732 | ret = 1; |
7d22c717 | 1733 | } |
de1c301e LP |
1734 | } |
1735 | ||
069f5e61 | 1736 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
4afd3348 | 1737 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1738 | int r; |
1739 | ||
d6888822 | 1740 | assert_return(m, -EINVAL); |
9030ca46 LP |
1741 | |
1742 | if (!bus) | |
1743 | bus = m->bus; | |
1744 | ||
d6888822 | 1745 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1746 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1747 | |
a3d59cd1 LP |
1748 | if (!BUS_IS_OPEN(bus->state)) |
1749 | return -ENOTCONN; | |
1750 | ||
021a1e78 LP |
1751 | if (m->n_fds > 0) { |
1752 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1753 | if (r < 0) | |
1754 | return r; | |
1755 | if (r == 0) | |
15411c0c | 1756 | return -EOPNOTSUPP; |
021a1e78 | 1757 | } |
de1c301e | 1758 | |
693eb9a2 | 1759 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1760 | * is expected */ |
693eb9a2 | 1761 | if (!cookie && !m->sealed) |
0461f8cd | 1762 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1763 | |
3df7a7e6 | 1764 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1765 | if (r < 0) |
1766 | return r; | |
1767 | ||
441d56a1 | 1768 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1769 | * message and place a replacement in m */ |
1770 | r = bus_remarshal_message(bus, &m); | |
1771 | if (r < 0) | |
1772 | return r; | |
1773 | ||
5407f2de LP |
1774 | /* If this is a reply and no reply was requested, then let's |
1775 | * suppress this, if we can */ | |
997eadb5 LP |
1776 | if (m->dont_send) |
1777 | goto finish; | |
5407f2de | 1778 | |
89ffcd2a | 1779 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1780 | size_t idx = 0; |
1781 | ||
069f5e61 | 1782 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1783 | if (r < 0) { |
441d56a1 | 1784 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1785 | bus_enter_closing(bus); |
441d56a1 LP |
1786 | return -ECONNRESET; |
1787 | } | |
32f46480 | 1788 | |
de1c301e | 1789 | return r; |
997eadb5 LP |
1790 | } |
1791 | ||
1792 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1793 | /* Wasn't fully written. So let's remember how |
1794 | * much was written. Note that the first entry | |
1795 | * of the wqueue array is always allocated so | |
1796 | * that we always can remember how much was | |
1797 | * written. */ | |
1798 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1799 | bus->wqueue_size = 1; | |
1800 | bus->windex = idx; | |
1801 | } | |
997eadb5 | 1802 | |
de1c301e | 1803 | } else { |
de1c301e LP |
1804 | /* Just append it to the queue. */ |
1805 | ||
25220239 | 1806 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1807 | return -ENOBUFS; |
1808 | ||
821e0756 | 1809 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1810 | return -ENOMEM; |
1811 | ||
313cefa1 | 1812 | bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); |
de1c301e LP |
1813 | } |
1814 | ||
997eadb5 | 1815 | finish: |
693eb9a2 LP |
1816 | if (cookie) |
1817 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1818 | |
7a37d625 | 1819 | return 1; |
de1c301e LP |
1820 | } |
1821 | ||
069f5e61 LP |
1822 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1823 | return bus_send_internal(bus, m, cookie, false); | |
1824 | } | |
1825 | ||
693eb9a2 | 1826 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1827 | int r; |
1828 | ||
911121a7 | 1829 | assert_return(m, -EINVAL); |
9030ca46 LP |
1830 | |
1831 | if (!bus) | |
1832 | bus = m->bus; | |
1833 | ||
911121a7 LP |
1834 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1835 | ||
a3d59cd1 LP |
1836 | if (!BUS_IS_OPEN(bus->state)) |
1837 | return -ENOTCONN; | |
1838 | ||
911121a7 LP |
1839 | if (!streq_ptr(m->destination, destination)) { |
1840 | ||
1841 | if (!destination) | |
1842 | return -EEXIST; | |
1843 | ||
1844 | r = sd_bus_message_set_destination(m, destination); | |
1845 | if (r < 0) | |
1846 | return r; | |
1847 | } | |
1848 | ||
693eb9a2 | 1849 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1850 | } |
1851 | ||
de1c301e LP |
1852 | static usec_t calc_elapse(uint64_t usec) { |
1853 | if (usec == (uint64_t) -1) | |
1854 | return 0; | |
1855 | ||
de1c301e LP |
1856 | return now(CLOCK_MONOTONIC) + usec; |
1857 | } | |
1858 | ||
e3017af9 LP |
1859 | static int timeout_compare(const void *a, const void *b) { |
1860 | const struct reply_callback *x = a, *y = b; | |
1861 | ||
1862 | if (x->timeout != 0 && y->timeout == 0) | |
1863 | return -1; | |
1864 | ||
1865 | if (x->timeout == 0 && y->timeout != 0) | |
1866 | return 1; | |
1867 | ||
1868 | if (x->timeout < y->timeout) | |
1869 | return -1; | |
1870 | ||
1871 | if (x->timeout > y->timeout) | |
1872 | return 1; | |
1873 | ||
1874 | return 0; | |
1875 | } | |
1876 | ||
c49b30a2 | 1877 | _public_ int sd_bus_call_async( |
de1c301e | 1878 | sd_bus *bus, |
19befb2d | 1879 | sd_bus_slot **slot, |
e1c433c6 | 1880 | sd_bus_message *_m, |
52f3ba91 | 1881 | sd_bus_message_handler_t callback, |
de1c301e | 1882 | void *userdata, |
19befb2d | 1883 | uint64_t usec) { |
de1c301e | 1884 | |
4afd3348 LP |
1885 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
1886 | _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; | |
de1c301e LP |
1887 | int r; |
1888 | ||
d6888822 | 1889 | assert_return(m, -EINVAL); |
40ca29a1 | 1890 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1891 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1892 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1893 | |
1894 | if (!bus) | |
1895 | bus = m->bus; | |
1896 | ||
d6888822 | 1897 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1898 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1899 | |
a3d59cd1 LP |
1900 | if (!BUS_IS_OPEN(bus->state)) |
1901 | return -ENOTCONN; | |
1902 | ||
c9fe4af7 | 1903 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1904 | if (r < 0) |
1905 | return r; | |
de1c301e | 1906 | |
3df7a7e6 LP |
1907 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1908 | if (r < 0) | |
1909 | return r; | |
e3017af9 | 1910 | |
3df7a7e6 | 1911 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1912 | if (r < 0) |
1913 | return r; | |
1914 | ||
e1c433c6 LP |
1915 | r = bus_remarshal_message(bus, &m); |
1916 | if (r < 0) | |
1917 | return r; | |
1918 | ||
19befb2d LP |
1919 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1920 | if (!s) | |
de1c301e LP |
1921 | return -ENOMEM; |
1922 | ||
19befb2d | 1923 | s->reply_callback.callback = callback; |
de1c301e | 1924 | |
19befb2d | 1925 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1926 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1927 | if (r < 0) { |
19befb2d | 1928 | s->reply_callback.cookie = 0; |
de1c301e LP |
1929 | return r; |
1930 | } | |
1931 | ||
19befb2d LP |
1932 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1933 | if (s->reply_callback.timeout != 0) { | |
1934 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1935 | if (r < 0) { |
19befb2d | 1936 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1937 | return r; |
1938 | } | |
1939 | } | |
1940 | ||
19befb2d LP |
1941 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1942 | if (r < 0) | |
de1c301e | 1943 | return r; |
de1c301e | 1944 | |
19befb2d LP |
1945 | if (slot) |
1946 | *slot = s; | |
1947 | s = NULL; | |
e3017af9 | 1948 | |
19befb2d | 1949 | return r; |
de1c301e LP |
1950 | } |
1951 | ||
20902f3e | 1952 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1953 | int r; |
1954 | ||
1955 | assert(bus); | |
1956 | ||
718db961 | 1957 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1958 | return -ENOTCONN; |
d728d708 LP |
1959 | if (bus->state == BUS_RUNNING) |
1960 | return 1; | |
89ffcd2a LP |
1961 | |
1962 | for (;;) { | |
1963 | r = sd_bus_process(bus, NULL); | |
1964 | if (r < 0) | |
1965 | return r; | |
d728d708 LP |
1966 | if (bus->state == BUS_RUNNING) |
1967 | return 1; | |
e3017af9 LP |
1968 | if (r > 0) |
1969 | continue; | |
89ffcd2a LP |
1970 | |
1971 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1972 | if (r < 0) | |
1973 | return r; | |
1974 | } | |
1975 | } | |
1976 | ||
97f82db3 | 1977 | _public_ int sd_bus_call( |
de1c301e | 1978 | sd_bus *bus, |
97f82db3 | 1979 | sd_bus_message *_m, |
de1c301e LP |
1980 | uint64_t usec, |
1981 | sd_bus_error *error, | |
1982 | sd_bus_message **reply) { | |
1983 | ||
4afd3348 | 1984 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1985 | usec_t timeout; |
693eb9a2 | 1986 | uint64_t cookie; |
7d22c717 LP |
1987 | unsigned i; |
1988 | int r; | |
de1c301e | 1989 | |
759e02e7 LP |
1990 | bus_assert_return(m, -EINVAL, error); |
1991 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
1992 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
1993 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
1994 | |
1995 | if (!bus) | |
1996 | bus = m->bus; | |
1997 | ||
759e02e7 LP |
1998 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
1999 | bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error); | |
97f82db3 | 2000 | |
759e02e7 LP |
2001 | if (!BUS_IS_OPEN(bus->state)) { |
2002 | r = -ENOTCONN; | |
2003 | goto fail; | |
2004 | } | |
a3d59cd1 | 2005 | |
97f82db3 KS |
2006 | r = bus_ensure_running(bus); |
2007 | if (r < 0) | |
759e02e7 | 2008 | goto fail; |
97f82db3 | 2009 | |
a43b9ca3 | 2010 | i = bus->rqueue_size; |
97f82db3 KS |
2011 | |
2012 | r = bus_seal_message(bus, m, usec); | |
2013 | if (r < 0) | |
759e02e7 | 2014 | goto fail; |
97f82db3 KS |
2015 | |
2016 | r = bus_remarshal_message(bus, &m); | |
2017 | if (r < 0) | |
759e02e7 | 2018 | goto fail; |
97f82db3 | 2019 | |
069f5e61 | 2020 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e | 2021 | if (r < 0) |
759e02e7 | 2022 | goto fail; |
de1c301e | 2023 | |
3df7a7e6 | 2024 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
2025 | |
2026 | for (;;) { | |
2027 | usec_t left; | |
de1c301e | 2028 | |
7d22c717 LP |
2029 | while (i < bus->rqueue_size) { |
2030 | sd_bus_message *incoming = NULL; | |
2031 | ||
2032 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2033 | |
693eb9a2 | 2034 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2035 | /* Found a match! */ |
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--; | |
f9f97ca6 | 2039 | log_debug_bus_message(incoming); |
7d22c717 | 2040 | |
40ca29a1 | 2041 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2042 | |
2ce97e2b LP |
2043 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2044 | if (reply) | |
2045 | *reply = incoming; | |
2046 | else | |
2047 | sd_bus_message_unref(incoming); | |
2048 | ||
2049 | return 1; | |
2050 | } | |
2051 | ||
2052 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2053 | sd_bus_message_unref(incoming); |
2054 | return r; | |
b7f247e0 | 2055 | |
759e02e7 | 2056 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2057 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2058 | sd_bus_message_unref(incoming); |
2059 | return r; | |
2060 | } else { | |
a43b9ca3 | 2061 | r = -EIO; |
759e02e7 LP |
2062 | goto fail; |
2063 | } | |
a8a07f89 | 2064 | |
693eb9a2 | 2065 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2066 | bus->unique_name && |
2067 | incoming->sender && | |
2068 | streq(bus->unique_name, incoming->sender)) { | |
2069 | ||
7d22c717 LP |
2070 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2071 | bus->rqueue_size--; | |
2072 | ||
a8a07f89 LP |
2073 | /* Our own message? Somebody is trying |
2074 | * to send its own client a message, | |
2075 | * let's not dead-lock, let's fail | |
2076 | * immediately. */ | |
2077 | ||
2078 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2079 | r = -ELOOP; |
2080 | goto fail; | |
de1c301e LP |
2081 | } |
2082 | ||
de1c301e | 2083 | /* Try to read more, right-away */ |
7d22c717 | 2084 | i++; |
de1c301e | 2085 | } |
7d22c717 | 2086 | |
766c5809 | 2087 | r = bus_read_message(bus, false, 0); |
32f46480 | 2088 | if (r < 0) { |
441d56a1 | 2089 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2090 | bus_enter_closing(bus); |
759e02e7 | 2091 | r = -ECONNRESET; |
441d56a1 | 2092 | } |
32f46480 | 2093 | |
759e02e7 | 2094 | goto fail; |
32f46480 | 2095 | } |
7d22c717 | 2096 | if (r > 0) |
e3017af9 | 2097 | continue; |
de1c301e LP |
2098 | |
2099 | if (timeout > 0) { | |
2100 | usec_t n; | |
2101 | ||
2102 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2103 | if (n >= timeout) { |
2104 | r = -ETIMEDOUT; | |
2105 | goto fail; | |
2106 | } | |
de1c301e LP |
2107 | |
2108 | left = timeout - n; | |
2109 | } else | |
2110 | left = (uint64_t) -1; | |
2111 | ||
e3017af9 | 2112 | r = bus_poll(bus, true, left); |
de1c301e | 2113 | if (r < 0) |
759e02e7 LP |
2114 | goto fail; |
2115 | if (r == 0) { | |
2116 | r = -ETIMEDOUT; | |
2117 | goto fail; | |
2118 | } | |
de1c301e LP |
2119 | |
2120 | r = dispatch_wqueue(bus); | |
32f46480 | 2121 | if (r < 0) { |
441d56a1 | 2122 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2123 | bus_enter_closing(bus); |
759e02e7 | 2124 | r = -ECONNRESET; |
441d56a1 | 2125 | } |
32f46480 | 2126 | |
759e02e7 | 2127 | goto fail; |
32f46480 | 2128 | } |
de1c301e | 2129 | } |
759e02e7 LP |
2130 | |
2131 | fail: | |
2132 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2133 | } |
2134 | ||
d9f644e2 | 2135 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2136 | |
2137 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2138 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2139 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2140 | |
e82c9509 | 2141 | return bus->input_fd; |
de1c301e LP |
2142 | } |
2143 | ||
d9f644e2 | 2144 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2145 | int flags = 0; |
2146 | ||
d6888822 | 2147 | assert_return(bus, -EINVAL); |
d6888822 | 2148 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2149 | |
a3d59cd1 LP |
2150 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2151 | return -ENOTCONN; | |
2152 | ||
de1c301e LP |
2153 | if (bus->state == BUS_OPENING) |
2154 | flags |= POLLOUT; | |
89ffcd2a LP |
2155 | else if (bus->state == BUS_AUTHENTICATING) { |
2156 | ||
2181a7f5 | 2157 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2158 | flags |= POLLOUT; |
2159 | ||
2160 | flags |= POLLIN; | |
2161 | ||
2162 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2163 | if (bus->rqueue_size <= 0) |
2164 | flags |= POLLIN; | |
2165 | if (bus->wqueue_size > 0) | |
2166 | flags |= POLLOUT; | |
2167 | } | |
2168 | ||
2169 | return flags; | |
2170 | } | |
2171 | ||
d9f644e2 | 2172 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2173 | struct reply_callback *c; |
2174 | ||
d6888822 LP |
2175 | assert_return(bus, -EINVAL); |
2176 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2177 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2178 | |
a3d59cd1 LP |
2179 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2180 | return -ENOTCONN; | |
2181 | ||
8f8f05a9 LP |
2182 | if (bus->track_queue) { |
2183 | *timeout_usec = 0; | |
2184 | return 1; | |
2185 | } | |
2186 | ||
718db961 LP |
2187 | if (bus->state == BUS_CLOSING) { |
2188 | *timeout_usec = 0; | |
2189 | return 1; | |
2190 | } | |
2191 | ||
e3017af9 LP |
2192 | if (bus->state == BUS_AUTHENTICATING) { |
2193 | *timeout_usec = bus->auth_timeout; | |
2194 | return 1; | |
2195 | } | |
2196 | ||
adee69fa LP |
2197 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2198 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2199 | return 0; |
adee69fa | 2200 | } |
e3017af9 | 2201 | |
8efd6381 LP |
2202 | if (bus->rqueue_size > 0) { |
2203 | *timeout_usec = 0; | |
2204 | return 1; | |
2205 | } | |
2206 | ||
e3017af9 | 2207 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2208 | if (!c) { |
2209 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2210 | return 0; |
adee69fa | 2211 | } |
e3017af9 | 2212 | |
19befb2d LP |
2213 | if (c->timeout == 0) { |
2214 | *timeout_usec = (uint64_t) -1; | |
2215 | return 0; | |
2216 | } | |
2217 | ||
e3017af9 LP |
2218 | *timeout_usec = c->timeout; |
2219 | return 1; | |
2220 | } | |
2221 | ||
2222 | static int process_timeout(sd_bus *bus) { | |
4afd3348 LP |
2223 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2224 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; | |
e3017af9 | 2225 | struct reply_callback *c; |
1b64f838 | 2226 | sd_bus_slot *slot; |
e3017af9 LP |
2227 | usec_t n; |
2228 | int r; | |
2229 | ||
2230 | assert(bus); | |
2231 | ||
2232 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2233 | if (!c) | |
2234 | return 0; | |
2235 | ||
2236 | n = now(CLOCK_MONOTONIC); | |
2237 | if (c->timeout > n) | |
2238 | return 0; | |
2239 | ||
eb01ba5d LP |
2240 | r = bus_message_new_synthetic_error( |
2241 | bus, | |
693eb9a2 | 2242 | c->cookie, |
14c24659 | 2243 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2244 | &m); |
2245 | if (r < 0) | |
2246 | return r; | |
2247 | ||
7adc46fc | 2248 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2249 | if (r < 0) |
2250 | return r; | |
2251 | ||
e3017af9 | 2252 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2253 | c->timeout = 0; |
2254 | ||
c9fe4af7 | 2255 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2256 | c->cookie = 0; |
2257 | ||
1b64f838 | 2258 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2259 | |
313cefa1 | 2260 | bus->iteration_counter++; |
718db961 | 2261 | |
1b64f838 LP |
2262 | bus->current_message = m; |
2263 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2264 | bus->current_handler = c->callback; |
2265 | bus->current_userdata = slot->userdata; | |
19070062 | 2266 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2267 | bus->current_userdata = NULL; |
2268 | bus->current_handler = NULL; | |
d974ad05 | 2269 | bus->current_slot = NULL; |
19befb2d | 2270 | bus->current_message = NULL; |
718db961 | 2271 | |
1b64f838 LP |
2272 | if (slot->floating) { |
2273 | bus_slot_disconnect(slot); | |
2274 | sd_bus_slot_unref(slot); | |
2275 | } | |
2276 | ||
d974ad05 DH |
2277 | sd_bus_slot_unref(slot); |
2278 | ||
1b64f838 | 2279 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2280 | } |
2281 | ||
9d373862 LP |
2282 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2283 | assert(bus); | |
2284 | assert(m); | |
2285 | ||
2286 | if (bus->state != BUS_HELLO) | |
2287 | return 0; | |
2288 | ||
2289 | /* Let's make sure the first message on the bus is the HELLO | |
2290 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2291 | * here (we leave that to the usual handling), we just verify |
2292 | * we don't let any earlier msg through. */ | |
9d373862 | 2293 | |
40ca29a1 LP |
2294 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2295 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2296 | return -EIO; |
2297 | ||
19befb2d | 2298 | if (m->reply_cookie != 1) |
9d373862 LP |
2299 | return -EIO; |
2300 | ||
2301 | return 0; | |
2302 | } | |
2303 | ||
a652755d | 2304 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
4afd3348 LP |
2305 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; |
2306 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
19befb2d | 2307 | struct reply_callback *c; |
1b64f838 | 2308 | sd_bus_slot *slot; |
a652755d LP |
2309 | int r; |
2310 | ||
2311 | assert(bus); | |
2312 | assert(m); | |
2313 | ||
40ca29a1 LP |
2314 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2315 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2316 | return 0; |
2317 | ||
09365592 LP |
2318 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2319 | return 0; | |
2320 | ||
2321 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2322 | return 0; | |
2323 | ||
c9fe4af7 | 2324 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2325 | if (!c) |
2326 | return 0; | |
2327 | ||
19befb2d | 2328 | c->cookie = 0; |
19befb2d | 2329 | |
1b64f838 | 2330 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2331 | |
2ce97e2b LP |
2332 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2333 | ||
2334 | /* If the reply contained a file descriptor which we | |
2335 | * didn't want we pass an error instead. */ | |
2336 | ||
2337 | r = bus_message_new_synthetic_error( | |
2338 | bus, | |
2339 | m->reply_cookie, | |
2340 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2341 | &synthetic_reply); | |
2342 | if (r < 0) | |
1b64f838 | 2343 | return r; |
2ce97e2b | 2344 | |
52cd5877 LP |
2345 | /* Copy over original timestamp */ |
2346 | synthetic_reply->realtime = m->realtime; | |
2347 | synthetic_reply->monotonic = m->monotonic; | |
2348 | synthetic_reply->seqnum = m->seqnum; | |
2349 | ||
2ce97e2b LP |
2350 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2351 | if (r < 0) | |
1b64f838 | 2352 | return r; |
2ce97e2b LP |
2353 | |
2354 | m = synthetic_reply; | |
2355 | } else { | |
2356 | r = sd_bus_message_rewind(m, true); | |
2357 | if (r < 0) | |
1b64f838 | 2358 | return r; |
2ce97e2b | 2359 | } |
88fe224c | 2360 | |
1b64f838 LP |
2361 | if (c->timeout != 0) { |
2362 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2363 | c->timeout = 0; | |
2364 | } | |
19befb2d | 2365 | |
1b64f838 | 2366 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2367 | bus->current_handler = c->callback; |
2368 | bus->current_userdata = slot->userdata; | |
19070062 | 2369 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2370 | bus->current_userdata = NULL; |
2371 | bus->current_handler = NULL; | |
d974ad05 | 2372 | bus->current_slot = NULL; |
a652755d | 2373 | |
19befb2d LP |
2374 | if (slot->floating) { |
2375 | bus_slot_disconnect(slot); | |
2376 | sd_bus_slot_unref(slot); | |
2377 | } | |
2378 | ||
d974ad05 DH |
2379 | sd_bus_slot_unref(slot); |
2380 | ||
1b64f838 | 2381 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2382 | } |
2383 | ||
2384 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
4afd3348 | 2385 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2386 | struct filter_callback *l; |
2387 | int r; | |
2388 | ||
392d5b37 LP |
2389 | assert(bus); |
2390 | assert(m); | |
2391 | ||
7286037f LP |
2392 | do { |
2393 | bus->filter_callbacks_modified = false; | |
2394 | ||
2395 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2396 | sd_bus_slot *slot; |
7286037f LP |
2397 | |
2398 | if (bus->filter_callbacks_modified) | |
2399 | break; | |
2400 | ||
2401 | /* Don't run this more than once per iteration */ | |
2402 | if (l->last_iteration == bus->iteration_counter) | |
2403 | continue; | |
2404 | ||
2405 | l->last_iteration = bus->iteration_counter; | |
2406 | ||
88fe224c LP |
2407 | r = sd_bus_message_rewind(m, true); |
2408 | if (r < 0) | |
2409 | return r; | |
2410 | ||
1b64f838 LP |
2411 | slot = container_of(l, sd_bus_slot, filter_callback); |
2412 | ||
2413 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2414 | bus->current_handler = l->callback; |
2415 | bus->current_userdata = slot->userdata; | |
19070062 | 2416 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2417 | bus->current_userdata = NULL; |
2418 | bus->current_handler = NULL; | |
1b64f838 | 2419 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2420 | |
ebcf1f97 | 2421 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2422 | if (r != 0) |
2423 | return r; | |
2424 | ||
2425 | } | |
2426 | ||
2427 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2428 | |
2429 | return 0; | |
2430 | } | |
2431 | ||
392d5b37 | 2432 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2433 | int r; |
2434 | ||
392d5b37 LP |
2435 | assert(bus); |
2436 | assert(m); | |
2437 | ||
7286037f LP |
2438 | do { |
2439 | bus->match_callbacks_modified = false; | |
2440 | ||
eb01ba5d | 2441 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2442 | if (r != 0) |
2443 | return r; | |
2444 | ||
2445 | } while (bus->match_callbacks_modified); | |
2446 | ||
2447 | return 0; | |
392d5b37 LP |
2448 | } |
2449 | ||
b9bf7e2b | 2450 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
4afd3348 | 2451 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
b9bf7e2b LP |
2452 | int r; |
2453 | ||
2454 | assert(bus); | |
2455 | assert(m); | |
2456 | ||
09365592 LP |
2457 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2458 | return 0; | |
2459 | ||
758bf0c7 LP |
2460 | if (bus->manual_peer_interface) |
2461 | return 0; | |
2462 | ||
40ca29a1 | 2463 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2464 | return 0; |
2465 | ||
2466 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2467 | return 0; | |
2468 | ||
0461f8cd | 2469 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2470 | return 1; |
2471 | ||
2472 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2473 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2474 | else if (streq_ptr(m->member, "GetMachineId")) { |
2475 | sd_id128_t id; | |
2476 | char sid[33]; | |
2477 | ||
2478 | r = sd_id128_get_machine(&id); | |
2479 | if (r < 0) | |
2480 | return r; | |
2481 | ||
df2d202e | 2482 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2483 | if (r < 0) |
2484 | return r; | |
2485 | ||
2486 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2487 | } else { | |
29ddb38f | 2488 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2489 | m, &reply, |
40ca29a1 | 2490 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2491 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2492 | } |
2493 | ||
2494 | if (r < 0) | |
2495 | return r; | |
2496 | ||
2497 | r = sd_bus_send(bus, reply, NULL); | |
2498 | if (r < 0) | |
2499 | return r; | |
2500 | ||
2501 | return 1; | |
2502 | } | |
2503 | ||
2ce97e2b LP |
2504 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2505 | assert(bus); | |
2506 | assert(m); | |
2507 | ||
2508 | /* If we got a message with a file descriptor which we didn't | |
2509 | * want to accept, then let's drop it. How can this even | |
2510 | * happen? For example, when the kernel queues a message into | |
2511 | * an activatable names's queue which allows fds, and then is | |
2512 | * delivered to us later even though we ourselves did not | |
2513 | * negotiate it. */ | |
2514 | ||
09365592 LP |
2515 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2516 | return 0; | |
2517 | ||
2ce97e2b LP |
2518 | if (m->n_fds <= 0) |
2519 | return 0; | |
2520 | ||
2521 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2522 | return 0; | |
2523 | ||
2524 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2525 | return 1; /* just eat it up */ | |
2526 | ||
2527 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2528 | } | |
2529 | ||
992c052c | 2530 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2531 | int r; |
2532 | ||
2533 | assert(bus); | |
992c052c | 2534 | assert(m); |
e3017af9 | 2535 | |
19befb2d | 2536 | bus->current_message = m; |
992c052c | 2537 | bus->iteration_counter++; |
e3017af9 | 2538 | |
f9f97ca6 | 2539 | log_debug_bus_message(m); |
40ca29a1 | 2540 | |
992c052c LP |
2541 | r = process_hello(bus, m); |
2542 | if (r != 0) | |
affff0b6 | 2543 | goto finish; |
a652755d | 2544 | |
992c052c LP |
2545 | r = process_reply(bus, m); |
2546 | if (r != 0) | |
affff0b6 | 2547 | goto finish; |
e3017af9 | 2548 | |
2ce97e2b LP |
2549 | r = process_fd_check(bus, m); |
2550 | if (r != 0) | |
2551 | goto finish; | |
2552 | ||
992c052c LP |
2553 | r = process_filter(bus, m); |
2554 | if (r != 0) | |
affff0b6 | 2555 | goto finish; |
a652755d | 2556 | |
992c052c LP |
2557 | r = process_match(bus, m); |
2558 | if (r != 0) | |
affff0b6 | 2559 | goto finish; |
a652755d | 2560 | |
992c052c LP |
2561 | r = process_builtin(bus, m); |
2562 | if (r != 0) | |
affff0b6 LP |
2563 | goto finish; |
2564 | ||
2565 | r = bus_process_object(bus, m); | |
a652755d | 2566 | |
affff0b6 | 2567 | finish: |
19befb2d | 2568 | bus->current_message = NULL; |
affff0b6 | 2569 | return r; |
29ddb38f | 2570 | } |
88fe224c | 2571 | |
8f8f05a9 LP |
2572 | static int dispatch_track(sd_bus *bus) { |
2573 | assert(bus); | |
2574 | ||
2575 | if (!bus->track_queue) | |
2576 | return 0; | |
2577 | ||
2578 | bus_track_dispatch(bus->track_queue); | |
2579 | return 1; | |
2580 | } | |
2581 | ||
766c5809 | 2582 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
4afd3348 | 2583 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
29ddb38f | 2584 | int r; |
a652755d | 2585 | |
29ddb38f | 2586 | assert(bus); |
992c052c | 2587 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2588 | |
992c052c LP |
2589 | r = process_timeout(bus); |
2590 | if (r != 0) | |
2591 | goto null_message; | |
7286037f | 2592 | |
992c052c LP |
2593 | r = dispatch_wqueue(bus); |
2594 | if (r != 0) | |
2595 | goto null_message; | |
7286037f | 2596 | |
8f8f05a9 LP |
2597 | r = dispatch_track(bus); |
2598 | if (r != 0) | |
2599 | goto null_message; | |
2600 | ||
766c5809 | 2601 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2602 | if (r < 0) |
2603 | return r; | |
2604 | if (!m) | |
2605 | goto null_message; | |
7286037f | 2606 | |
992c052c LP |
2607 | r = process_message(bus, m); |
2608 | if (r != 0) | |
2609 | goto null_message; | |
7286037f | 2610 | |
992c052c LP |
2611 | if (ret) { |
2612 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2613 | if (r < 0) |
2614 | return r; | |
e3017af9 | 2615 | |
992c052c LP |
2616 | *ret = m; |
2617 | m = NULL; | |
2618 | return 1; | |
2619 | } | |
a652755d | 2620 | |
40ca29a1 | 2621 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2622 | |
dc74ce9b LP |
2623 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2624 | strna(sd_bus_message_get_sender(m)), | |
2625 | strna(sd_bus_message_get_path(m)), | |
2626 | strna(sd_bus_message_get_interface(m)), | |
2627 | strna(sd_bus_message_get_member(m))); | |
2628 | ||
992c052c | 2629 | r = sd_bus_reply_method_errorf( |
df2d202e | 2630 | m, |
40ca29a1 | 2631 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2632 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2633 | if (r < 0) |
2634 | return r; | |
2635 | } | |
e3017af9 | 2636 | |
992c052c | 2637 | return 1; |
0a72c2bd | 2638 | |
992c052c LP |
2639 | null_message: |
2640 | if (r >= 0 && ret) | |
2641 | *ret = NULL; | |
0a72c2bd | 2642 | |
992c052c | 2643 | return r; |
29ddb38f | 2644 | } |
0a72c2bd | 2645 | |
718db961 | 2646 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
4afd3348 | 2647 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
718db961 LP |
2648 | struct reply_callback *c; |
2649 | int r; | |
2650 | ||
2651 | assert(bus); | |
2652 | assert(bus->state == BUS_CLOSING); | |
2653 | ||
c9fe4af7 | 2654 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2655 | if (c) { |
4afd3348 | 2656 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2657 | sd_bus_slot *slot; |
ebcf1f97 | 2658 | |
718db961 LP |
2659 | /* First, fail all outstanding method calls */ |
2660 | r = bus_message_new_synthetic_error( | |
2661 | bus, | |
693eb9a2 | 2662 | c->cookie, |
14c24659 | 2663 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2664 | &m); |
2665 | if (r < 0) | |
2666 | return r; | |
2667 | ||
7adc46fc | 2668 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2669 | if (r < 0) |
2670 | return r; | |
2671 | ||
19befb2d | 2672 | if (c->timeout != 0) { |
718db961 | 2673 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2674 | c->timeout = 0; |
2675 | } | |
718db961 | 2676 | |
c9fe4af7 | 2677 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2678 | c->cookie = 0; |
2679 | ||
1b64f838 | 2680 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2681 | |
718db961 LP |
2682 | bus->iteration_counter++; |
2683 | ||
1b64f838 LP |
2684 | bus->current_message = m; |
2685 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2686 | bus->current_handler = c->callback; |
2687 | bus->current_userdata = slot->userdata; | |
19070062 | 2688 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2689 | bus->current_userdata = NULL; |
2690 | bus->current_handler = NULL; | |
d974ad05 | 2691 | bus->current_slot = NULL; |
1b64f838 LP |
2692 | bus->current_message = NULL; |
2693 | ||
2694 | if (slot->floating) { | |
2695 | bus_slot_disconnect(slot); | |
2696 | sd_bus_slot_unref(slot); | |
2697 | } | |
718db961 | 2698 | |
d974ad05 DH |
2699 | sd_bus_slot_unref(slot); |
2700 | ||
1b64f838 | 2701 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2702 | } |
2703 | ||
2704 | /* Then, synthesize a Disconnected message */ | |
2705 | r = sd_bus_message_new_signal( | |
2706 | bus, | |
151b9b96 | 2707 | &m, |
718db961 LP |
2708 | "/org/freedesktop/DBus/Local", |
2709 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2710 | "Disconnected"); |
718db961 LP |
2711 | if (r < 0) |
2712 | return r; | |
2713 | ||
fb6d9b77 | 2714 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2715 | |
7adc46fc | 2716 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2717 | if (r < 0) |
2718 | return r; | |
2719 | ||
2720 | sd_bus_close(bus); | |
2721 | ||
19befb2d | 2722 | bus->current_message = m; |
718db961 LP |
2723 | bus->iteration_counter++; |
2724 | ||
2725 | r = process_filter(bus, m); | |
2726 | if (r != 0) | |
2727 | goto finish; | |
2728 | ||
2729 | r = process_match(bus, m); | |
2730 | if (r != 0) | |
2731 | goto finish; | |
2732 | ||
2733 | if (ret) { | |
2734 | *ret = m; | |
2735 | m = NULL; | |
2736 | } | |
2737 | ||
2738 | r = 1; | |
2739 | ||
2740 | finish: | |
19befb2d LP |
2741 | bus->current_message = NULL; |
2742 | ||
718db961 LP |
2743 | return r; |
2744 | } | |
2745 | ||
766c5809 | 2746 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2747 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2748 | int r; |
0a72c2bd | 2749 | |
992c052c LP |
2750 | /* Returns 0 when we didn't do anything. This should cause the |
2751 | * caller to invoke sd_bus_wait() before returning the next | |
2752 | * time. Returns > 0 when we did something, which possibly | |
2753 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2754 | |
d6888822 LP |
2755 | assert_return(bus, -EINVAL); |
2756 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2757 | |
992c052c | 2758 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2759 | assert_return(!bus->current_message, -EBUSY); |
2760 | assert(!bus->current_slot); | |
0a72c2bd | 2761 | |
992c052c | 2762 | switch (bus->state) { |
0a72c2bd | 2763 | |
992c052c | 2764 | case BUS_UNSET: |
992c052c | 2765 | return -ENOTCONN; |
0a72c2bd | 2766 | |
6d6f4904 LP |
2767 | case BUS_CLOSED: |
2768 | return -ECONNRESET; | |
2769 | ||
992c052c LP |
2770 | case BUS_OPENING: |
2771 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2772 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2773 | bus_enter_closing(bus); |
2774 | r = 1; | |
2775 | } else if (r < 0) | |
29ddb38f | 2776 | return r; |
992c052c LP |
2777 | if (ret) |
2778 | *ret = NULL; | |
a652755d LP |
2779 | return r; |
2780 | ||
992c052c | 2781 | case BUS_AUTHENTICATING: |
992c052c | 2782 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2783 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2784 | bus_enter_closing(bus); |
2785 | r = 1; | |
2786 | } else if (r < 0) | |
29ddb38f | 2787 | return r; |
718db961 | 2788 | |
992c052c LP |
2789 | if (ret) |
2790 | *ret = NULL; | |
718db961 | 2791 | |
992c052c | 2792 | return r; |
a652755d | 2793 | |
992c052c LP |
2794 | case BUS_RUNNING: |
2795 | case BUS_HELLO: | |
766c5809 | 2796 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2797 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2798 | bus_enter_closing(bus); |
2799 | r = 1; | |
2800 | ||
2801 | if (ret) | |
2802 | *ret = NULL; | |
2803 | } | |
43a43f50 | 2804 | |
43a43f50 | 2805 | return r; |
718db961 LP |
2806 | |
2807 | case BUS_CLOSING: | |
2808 | return process_closing(bus, ret); | |
992c052c | 2809 | } |
43a43f50 | 2810 | |
992c052c | 2811 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2812 | } |
2813 | ||
766c5809 LP |
2814 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2815 | return bus_process_internal(bus, false, 0, ret); | |
2816 | } | |
2817 | ||
2818 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2819 | return bus_process_internal(bus, true, priority, ret); | |
2820 | } | |
2821 | ||
992c052c LP |
2822 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2823 | struct pollfd p[2] = {}; | |
2824 | int r, e, n; | |
2825 | struct timespec ts; | |
3a43da28 | 2826 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2827 | |
2828 | assert(bus); | |
718db961 LP |
2829 | |
2830 | if (bus->state == BUS_CLOSING) | |
2831 | return 1; | |
2832 | ||
a3d59cd1 LP |
2833 | if (!BUS_IS_OPEN(bus->state)) |
2834 | return -ENOTCONN; | |
adcdb374 | 2835 | |
992c052c LP |
2836 | e = sd_bus_get_events(bus); |
2837 | if (e < 0) | |
2838 | return e; | |
adcdb374 | 2839 | |
992c052c | 2840 | if (need_more) |
8efd6381 LP |
2841 | /* The caller really needs some more data, he doesn't |
2842 | * care about what's already read, or any timeouts | |
ad67ef27 | 2843 | * except its own. */ |
992c052c | 2844 | e |= POLLIN; |
992c052c | 2845 | else { |
8efd6381 LP |
2846 | usec_t until; |
2847 | /* The caller wants to process if there's something to | |
2848 | * process, but doesn't care otherwise */ | |
2849 | ||
2850 | r = sd_bus_get_timeout(bus, &until); | |
2851 | if (r < 0) | |
2852 | return r; | |
2853 | if (r > 0) { | |
2854 | usec_t nw; | |
2855 | nw = now(CLOCK_MONOTONIC); | |
2856 | m = until > nw ? until - nw : 0; | |
2857 | } | |
992c052c | 2858 | } |
adcdb374 | 2859 | |
992c052c LP |
2860 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2861 | m = timeout_usec; | |
adcdb374 | 2862 | |
992c052c LP |
2863 | p[0].fd = bus->input_fd; |
2864 | if (bus->output_fd == bus->input_fd) { | |
2865 | p[0].events = e; | |
2866 | n = 1; | |
2867 | } else { | |
2868 | p[0].events = e & POLLIN; | |
2869 | p[1].fd = bus->output_fd; | |
2870 | p[1].events = e & POLLOUT; | |
2871 | n = 2; | |
adcdb374 LP |
2872 | } |
2873 | ||
992c052c | 2874 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2875 | if (r < 0) |
992c052c | 2876 | return -errno; |
adcdb374 | 2877 | |
992c052c | 2878 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2879 | } |
2880 | ||
d9f644e2 | 2881 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2882 | |
d6888822 | 2883 | assert_return(bus, -EINVAL); |
d6888822 | 2884 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2885 | |
718db961 LP |
2886 | if (bus->state == BUS_CLOSING) |
2887 | return 0; | |
2888 | ||
a3d59cd1 LP |
2889 | if (!BUS_IS_OPEN(bus->state)) |
2890 | return -ENOTCONN; | |
718db961 | 2891 | |
992c052c LP |
2892 | if (bus->rqueue_size > 0) |
2893 | return 0; | |
9db76355 | 2894 | |
992c052c LP |
2895 | return bus_poll(bus, false, timeout_usec); |
2896 | } | |
9db76355 | 2897 | |
d9f644e2 | 2898 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2899 | int r; |
9db76355 | 2900 | |
d6888822 | 2901 | assert_return(bus, -EINVAL); |
d6888822 | 2902 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2903 | |
718db961 LP |
2904 | if (bus->state == BUS_CLOSING) |
2905 | return 0; | |
2906 | ||
a3d59cd1 LP |
2907 | if (!BUS_IS_OPEN(bus->state)) |
2908 | return -ENOTCONN; | |
718db961 | 2909 | |
992c052c LP |
2910 | r = bus_ensure_running(bus); |
2911 | if (r < 0) | |
2912 | return r; | |
9db76355 | 2913 | |
992c052c LP |
2914 | if (bus->wqueue_size <= 0) |
2915 | return 0; | |
9db76355 | 2916 | |
992c052c LP |
2917 | for (;;) { |
2918 | r = dispatch_wqueue(bus); | |
32f46480 | 2919 | if (r < 0) { |
441d56a1 | 2920 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2921 | bus_enter_closing(bus); |
441d56a1 LP |
2922 | return -ECONNRESET; |
2923 | } | |
32f46480 | 2924 | |
9db76355 | 2925 | return r; |
32f46480 | 2926 | } |
9db76355 | 2927 | |
992c052c LP |
2928 | if (bus->wqueue_size <= 0) |
2929 | return 0; | |
9db76355 | 2930 | |
992c052c | 2931 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2932 | if (r < 0) |
2933 | return r; | |
9db76355 | 2934 | } |
9db76355 LP |
2935 | } |
2936 | ||
19befb2d LP |
2937 | _public_ int sd_bus_add_filter( |
2938 | sd_bus *bus, | |
2939 | sd_bus_slot **slot, | |
2940 | sd_bus_message_handler_t callback, | |
2941 | void *userdata) { | |
d9f644e2 | 2942 | |
19befb2d | 2943 | sd_bus_slot *s; |
de1c301e | 2944 | |
d6888822 LP |
2945 | assert_return(bus, -EINVAL); |
2946 | assert_return(callback, -EINVAL); | |
2947 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2948 | |
19befb2d LP |
2949 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2950 | if (!s) | |
29ddb38f LP |
2951 | return -ENOMEM; |
2952 | ||
19befb2d | 2953 | s->filter_callback.callback = callback; |
a652755d | 2954 | |
19befb2d LP |
2955 | bus->filter_callbacks_modified = true; |
2956 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2957 | |
19befb2d LP |
2958 | if (slot) |
2959 | *slot = s; | |
29ddb38f | 2960 | |
992c052c | 2961 | return 0; |
a652755d | 2962 | } |
392d5b37 | 2963 | |
19befb2d LP |
2964 | _public_ int sd_bus_add_match( |
2965 | sd_bus *bus, | |
2966 | sd_bus_slot **slot, | |
2967 | const char *match, | |
2968 | sd_bus_message_handler_t callback, | |
2969 | void *userdata) { | |
d9f644e2 | 2970 | |
992c052c LP |
2971 | struct bus_match_component *components = NULL; |
2972 | unsigned n_components = 0; | |
2915234d | 2973 | sd_bus_slot *s = NULL; |
992c052c | 2974 | int r = 0; |
392d5b37 | 2975 | |
d6888822 LP |
2976 | assert_return(bus, -EINVAL); |
2977 | assert_return(match, -EINVAL); | |
2978 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2979 | |
992c052c LP |
2980 | r = bus_match_parse(match, &components, &n_components); |
2981 | if (r < 0) | |
2982 | goto finish; | |
29ddb38f | 2983 | |
19befb2d LP |
2984 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2985 | if (!s) { | |
2986 | r = -ENOMEM; | |
2987 | goto finish; | |
2988 | } | |
2989 | ||
2990 | s->match_callback.callback = callback; | |
2991 | s->match_callback.cookie = ++bus->match_cookie; | |
2992 | ||
992c052c | 2993 | if (bus->bus_client) { |
cc65fe5e | 2994 | enum bus_match_scope scope; |
29ddb38f | 2995 | |
cc65fe5e | 2996 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 2997 | |
cc65fe5e LP |
2998 | /* Do not install server-side matches for matches |
2999 | * against the local service, interface or bus | |
9ee7a50c DH |
3000 | * path. */ |
3001 | if (scope != BUS_MATCH_LOCAL) { | |
cc65fe5e LP |
3002 | |
3003 | if (!bus->is_kernel) { | |
3004 | /* When this is not a kernel transport, we | |
3005 | * store the original match string, so that we | |
3006 | * can use it to remove the match again */ | |
3007 | ||
3008 | s->match_callback.match_string = strdup(match); | |
3009 | if (!s->match_callback.match_string) { | |
3010 | r = -ENOMEM; | |
3011 | goto finish; | |
3012 | } | |
19befb2d | 3013 | } |
19befb2d | 3014 | |
cc65fe5e LP |
3015 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); |
3016 | if (r < 0) | |
3017 | goto finish; | |
3018 | ||
3019 | s->match_added = true; | |
3020 | } | |
392d5b37 LP |
3021 | } |
3022 | ||
992c052c | 3023 | bus->match_callbacks_modified = true; |
19befb2d LP |
3024 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3025 | if (r < 0) | |
3026 | goto finish; | |
3027 | ||
3028 | if (slot) | |
3029 | *slot = s; | |
3030 | s = NULL; | |
917b5dc7 | 3031 | |
992c052c LP |
3032 | finish: |
3033 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3034 | sd_bus_slot_unref(s); |
3035 | ||
992c052c | 3036 | return r; |
917b5dc7 LP |
3037 | } |
3038 | ||
19befb2d LP |
3039 | int bus_remove_match_by_string( |
3040 | sd_bus *bus, | |
3041 | const char *match, | |
3042 | sd_bus_message_handler_t callback, | |
3043 | void *userdata) { | |
d9f644e2 | 3044 | |
992c052c LP |
3045 | struct bus_match_component *components = NULL; |
3046 | unsigned n_components = 0; | |
19befb2d LP |
3047 | struct match_callback *c; |
3048 | int r = 0; | |
917b5dc7 | 3049 | |
d6888822 LP |
3050 | assert_return(bus, -EINVAL); |
3051 | assert_return(match, -EINVAL); | |
3052 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3053 | |
992c052c | 3054 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3055 | if (r < 0) |
19befb2d | 3056 | goto finish; |
f10dda3b | 3057 | |
19befb2d LP |
3058 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3059 | if (r <= 0) | |
3060 | goto finish; | |
f10dda3b | 3061 | |
19befb2d | 3062 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3063 | |
19befb2d | 3064 | finish: |
992c052c | 3065 | bus_match_parse_free(components, n_components); |
f10dda3b | 3066 | |
19befb2d | 3067 | return r; |
f10dda3b LP |
3068 | } |
3069 | ||
992c052c LP |
3070 | bool bus_pid_changed(sd_bus *bus) { |
3071 | assert(bus); | |
f10dda3b | 3072 | |
992c052c LP |
3073 | /* We don't support people creating a bus connection and |
3074 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3075 | |
992c052c | 3076 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3077 | } |
40ca29a1 LP |
3078 | |
3079 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3080 | sd_bus *bus = userdata; |
40ca29a1 LP |
3081 | int r; |
3082 | ||
3083 | assert(bus); | |
3084 | ||
3085 | r = sd_bus_process(bus, NULL); | |
3086 | if (r < 0) | |
3087 | return r; | |
3088 | ||
3089 | return 1; | |
3090 | } | |
3091 | ||
3092 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3093 | sd_bus *bus = userdata; |
40ca29a1 LP |
3094 | int r; |
3095 | ||
3096 | assert(bus); | |
3097 | ||
3098 | r = sd_bus_process(bus, NULL); | |
3099 | if (r < 0) | |
3100 | return r; | |
3101 | ||
3102 | return 1; | |
3103 | } | |
3104 | ||
3105 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3106 | sd_bus *bus = userdata; | |
3107 | int r, e; | |
3108 | usec_t until; | |
3109 | ||
3110 | assert(s); | |
3111 | assert(bus); | |
3112 | ||
3113 | e = sd_bus_get_events(bus); | |
3114 | if (e < 0) | |
3115 | return e; | |
3116 | ||
3117 | if (bus->output_fd != bus->input_fd) { | |
3118 | ||
3119 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3120 | if (r < 0) | |
3121 | return r; | |
3122 | ||
3123 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3124 | if (r < 0) | |
3125 | return r; | |
3126 | } else { | |
3127 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3128 | if (r < 0) | |
3129 | return r; | |
3130 | } | |
3131 | ||
3132 | r = sd_bus_get_timeout(bus, &until); | |
3133 | if (r < 0) | |
3134 | return r; | |
3135 | if (r > 0) { | |
3136 | int j; | |
3137 | ||
3138 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3139 | if (j < 0) | |
3140 | return j; | |
3141 | } | |
3142 | ||
3143 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3144 | if (r < 0) | |
3145 | return r; | |
3146 | ||
3147 | return 1; | |
3148 | } | |
3149 | ||
abc5fe72 LP |
3150 | static int quit_callback(sd_event_source *event, void *userdata) { |
3151 | sd_bus *bus = userdata; | |
3152 | ||
3153 | assert(event); | |
3154 | ||
3155 | sd_bus_flush(bus); | |
7bb4d371 | 3156 | sd_bus_close(bus); |
abc5fe72 LP |
3157 | |
3158 | return 1; | |
3159 | } | |
3160 | ||
1e05d493 LP |
3161 | static int attach_io_events(sd_bus *bus) { |
3162 | int r; | |
3163 | ||
3164 | assert(bus); | |
3165 | ||
3166 | if (bus->input_fd < 0) | |
3167 | return 0; | |
3168 | ||
3169 | if (!bus->event) | |
3170 | return 0; | |
3171 | ||
3172 | if (!bus->input_io_event_source) { | |
151b9b96 | 3173 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3174 | if (r < 0) |
3175 | return r; | |
3176 | ||
3177 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3178 | if (r < 0) | |
3179 | return r; | |
3180 | ||
3181 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3182 | if (r < 0) |
3183 | return r; | |
3184 | ||
356779df | 3185 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3186 | } else |
3187 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3188 | ||
3189 | if (r < 0) | |
3190 | return r; | |
3191 | ||
3192 | if (bus->output_fd != bus->input_fd) { | |
3193 | assert(bus->output_fd >= 0); | |
3194 | ||
3195 | if (!bus->output_io_event_source) { | |
151b9b96 | 3196 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3197 | if (r < 0) |
3198 | return r; | |
3199 | ||
3200 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3201 | if (r < 0) |
3202 | return r; | |
3203 | ||
356779df | 3204 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3205 | } else |
3206 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3207 | ||
3208 | if (r < 0) | |
3209 | return r; | |
3210 | } | |
3211 | ||
3212 | return 0; | |
3213 | } | |
3214 | ||
3215 | static void detach_io_events(sd_bus *bus) { | |
3216 | assert(bus); | |
3217 | ||
3218 | if (bus->input_io_event_source) { | |
3219 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3220 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3221 | } | |
3222 | ||
3223 | if (bus->output_io_event_source) { | |
3224 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3225 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3226 | } | |
3227 | } | |
3228 | ||
d9f644e2 | 3229 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3230 | int r; |
3231 | ||
3232 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3233 | assert_return(!bus->event, -EBUSY); |
3234 | ||
3235 | assert(!bus->input_io_event_source); | |
3236 | assert(!bus->output_io_event_source); | |
3237 | assert(!bus->time_event_source); | |
3238 | ||
76b54375 LP |
3239 | if (event) |
3240 | bus->event = sd_event_ref(event); | |
3241 | else { | |
3242 | r = sd_event_default(&bus->event); | |
3243 | if (r < 0) | |
3244 | return r; | |
3245 | } | |
40ca29a1 | 3246 | |
1e05d493 | 3247 | bus->event_priority = priority; |
40ca29a1 | 3248 | |
6a0f1f6d | 3249 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3250 | if (r < 0) |
3251 | goto fail; | |
3252 | ||
3253 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3254 | if (r < 0) | |
3255 | goto fail; | |
3256 | ||
356779df | 3257 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3258 | if (r < 0) |
3259 | goto fail; | |
3260 | ||
151b9b96 | 3261 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3262 | if (r < 0) |
3263 | goto fail; | |
3264 | ||
356779df | 3265 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3266 | if (r < 0) |
3267 | goto fail; | |
3268 | ||
1e05d493 LP |
3269 | r = attach_io_events(bus); |
3270 | if (r < 0) | |
3271 | goto fail; | |
3272 | ||
40ca29a1 LP |
3273 | return 0; |
3274 | ||
3275 | fail: | |
3276 | sd_bus_detach_event(bus); | |
3277 | return r; | |
3278 | } | |
3279 | ||
d9f644e2 | 3280 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3281 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3282 | |
3283 | if (!bus->event) | |
3284 | return 0; | |
40ca29a1 | 3285 | |
1e05d493 | 3286 | detach_io_events(bus); |
40ca29a1 | 3287 | |
86befb40 LP |
3288 | if (bus->time_event_source) { |
3289 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3290 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3291 | } |
40ca29a1 | 3292 | |
86befb40 LP |
3293 | if (bus->quit_event_source) { |
3294 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3295 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3296 | } |
abc5fe72 | 3297 | |
93f1bcf4 | 3298 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3299 | return 1; |
40ca29a1 | 3300 | } |
affff0b6 | 3301 | |
2be44176 LP |
3302 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3303 | assert_return(bus, NULL); | |
3304 | ||
3305 | return bus->event; | |
3306 | } | |
3307 | ||
19befb2d LP |
3308 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3309 | assert_return(bus, NULL); | |
3310 | ||
3311 | return bus->current_message; | |
3312 | } | |
3313 | ||
3314 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3315 | assert_return(bus, NULL); |
3316 | ||
19befb2d | 3317 | return bus->current_slot; |
affff0b6 | 3318 | } |
76b54375 | 3319 | |
caa82984 LP |
3320 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3321 | assert_return(bus, NULL); | |
3322 | ||
3323 | return bus->current_handler; | |
3324 | } | |
3325 | ||
3326 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3327 | assert_return(bus, NULL); | |
3328 | ||
3329 | return bus->current_userdata; | |
3330 | } | |
3331 | ||
76b54375 LP |
3332 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3333 | sd_bus *b = NULL; | |
3334 | int r; | |
3335 | ||
3336 | assert(bus_open); | |
3337 | assert(default_bus); | |
3338 | ||
3339 | if (!ret) | |
3340 | return !!*default_bus; | |
3341 | ||
3342 | if (*default_bus) { | |
3343 | *ret = sd_bus_ref(*default_bus); | |
3344 | return 0; | |
3345 | } | |
3346 | ||
3347 | r = bus_open(&b); | |
3348 | if (r < 0) | |
3349 | return r; | |
3350 | ||
3351 | b->default_bus_ptr = default_bus; | |
3352 | b->tid = gettid(); | |
3353 | *default_bus = b; | |
3354 | ||
3355 | *ret = b; | |
3356 | return 1; | |
3357 | } | |
3358 | ||
3359 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3360 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3361 | } | |
3362 | ||
76b54375 | 3363 | |
fa2f8973 | 3364 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3365 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3366 | } | |
3367 | ||
af08d2f9 LP |
3368 | _public_ int sd_bus_default(sd_bus **ret) { |
3369 | ||
3370 | const char *e; | |
3371 | ||
3372 | /* Let's try our best to reuse another cached connection. If | |
3373 | * the starter bus type is set, connect via our normal | |
3374 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3375 | * we can share the connection with the user/system default | |
3376 | * bus. */ | |
3377 | ||
3378 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3379 | if (e) { | |
3380 | if (streq(e, "system")) | |
3381 | return sd_bus_default_system(ret); | |
09365592 | 3382 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3383 | return sd_bus_default_user(ret); |
3384 | } | |
3385 | ||
3386 | /* No type is specified, so we have not other option than to | |
3387 | * use the starter address if it is set. */ | |
3388 | ||
3389 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3390 | if (e) { | |
af08d2f9 LP |
3391 | |
3392 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3393 | } | |
3394 | ||
3395 | /* Finally, if nothing is set use the cached connection for | |
3396 | * the right scope */ | |
3397 | ||
3398 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3399 | return sd_bus_default_user(ret); | |
3400 | else | |
3401 | return sd_bus_default_system(ret); | |
3402 | } | |
3403 | ||
76b54375 LP |
3404 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3405 | assert_return(b, -EINVAL); | |
3406 | assert_return(tid, -EINVAL); | |
3407 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3408 | ||
3409 | if (b->tid != 0) { | |
3410 | *tid = b->tid; | |
3411 | return 0; | |
3412 | } | |
3413 | ||
3414 | if (b->event) | |
3415 | return sd_event_get_tid(b->event, tid); | |
3416 | ||
3417 | return -ENXIO; | |
3418 | } | |
28383ba1 | 3419 | |
a6278b88 LP |
3420 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3421 | _cleanup_free_ char *e = NULL; | |
3422 | char *ret; | |
3423 | ||
3424 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3425 | assert_return(external_id, -EINVAL); | |
3426 | assert_return(ret_path, -EINVAL); | |
3427 | ||
3428 | e = bus_label_escape(external_id); | |
3429 | if (!e) | |
3430 | return -ENOMEM; | |
3431 | ||
3432 | ret = strjoin(prefix, "/", e, NULL); | |
3433 | if (!ret) | |
3434 | return -ENOMEM; | |
3435 | ||
3436 | *ret_path = ret; | |
3437 | return 0; | |
28383ba1 LP |
3438 | } |
3439 | ||
a6278b88 LP |
3440 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3441 | const char *e; | |
3442 | char *ret; | |
3443 | ||
3444 | assert_return(object_path_is_valid(path), -EINVAL); | |
3445 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3446 | assert_return(external_id, -EINVAL); | |
3447 | ||
3448 | e = object_path_startswith(path, prefix); | |
3449 | if (!e) { | |
3450 | *external_id = NULL; | |
3451 | return 0; | |
3452 | } | |
3453 | ||
3454 | ret = bus_label_unescape(e); | |
3455 | if (!ret) | |
3456 | return -ENOMEM; | |
3457 | ||
3458 | *external_id = ret; | |
3459 | return 1; | |
28383ba1 | 3460 | } |
5b12334d | 3461 | |
dfb815c3 DH |
3462 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3463 | _cleanup_strv_free_ char **labels = NULL; | |
3464 | char *path, *path_pos, **label_pos; | |
3465 | const char *sep, *template_pos; | |
3466 | size_t path_length; | |
3467 | va_list list; | |
3468 | int r; | |
3469 | ||
3470 | assert_return(out, -EINVAL); | |
3471 | assert_return(path_template, -EINVAL); | |
3472 | ||
3473 | path_length = strlen(path_template); | |
3474 | ||
19932084 | 3475 | va_start(list, path_template); |
dfb815c3 DH |
3476 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3477 | const char *arg; | |
3478 | char *label; | |
3479 | ||
3480 | arg = va_arg(list, const char *); | |
3481 | if (!arg) { | |
3482 | va_end(list); | |
3483 | return -EINVAL; | |
3484 | } | |
3485 | ||
3486 | label = bus_label_escape(arg); | |
3487 | if (!label) { | |
3488 | va_end(list); | |
3489 | return -ENOMEM; | |
3490 | } | |
3491 | ||
3492 | r = strv_consume(&labels, label); | |
3493 | if (r < 0) { | |
3494 | va_end(list); | |
3495 | return r; | |
3496 | } | |
3497 | ||
3498 | /* add label length, but account for the format character */ | |
3499 | path_length += strlen(label) - 1; | |
3500 | } | |
3501 | va_end(list); | |
3502 | ||
3503 | path = malloc(path_length + 1); | |
3504 | if (!path) | |
3505 | return -ENOMEM; | |
3506 | ||
3507 | path_pos = path; | |
3508 | label_pos = labels; | |
3509 | ||
3510 | for (template_pos = path_template; *template_pos; ) { | |
3511 | sep = strchrnul(template_pos, '%'); | |
3512 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3513 | if (!*sep) | |
3514 | break; | |
3515 | ||
3516 | path_pos = stpcpy(path_pos, *label_pos++); | |
3517 | template_pos = sep + 1; | |
3518 | } | |
3519 | ||
3520 | *path_pos = 0; | |
3521 | *out = path; | |
3522 | return 0; | |
3523 | } | |
3524 | ||
3525 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3526 | _cleanup_strv_free_ char **labels = NULL; | |
3527 | const char *template_pos, *path_pos; | |
3528 | char **label_pos; | |
3529 | va_list list; | |
3530 | int r; | |
3531 | ||
3532 | /* | |
3533 | * This decodes an object-path based on a template argument. The | |
3534 | * template consists of a verbatim path, optionally including special | |
3535 | * directives: | |
3536 | * | |
3537 | * - Each occurrence of '%' in the template matches an arbitrary | |
3538 | * substring of a label in the given path. At most one such | |
3539 | * directive is allowed per label. For each such directive, the | |
3540 | * caller must provide an output parameter (char **) via va_arg. If | |
3541 | * NULL is passed, the given label is verified, but not returned. | |
3542 | * For each matched label, the *decoded* label is stored in the | |
3543 | * passed output argument, and the caller is responsible to free | |
3544 | * it. Note that the output arguments are only modified if the | |
3545 | * actualy path matched the template. Otherwise, they're left | |
3546 | * untouched. | |
3547 | * | |
3548 | * This function returns <0 on error, 0 if the path does not match the | |
3549 | * template, 1 if it matched. | |
3550 | */ | |
3551 | ||
3552 | assert_return(path, -EINVAL); | |
3553 | assert_return(path_template, -EINVAL); | |
3554 | ||
3555 | path_pos = path; | |
3556 | ||
3557 | for (template_pos = path_template; *template_pos; ) { | |
3558 | const char *sep; | |
3559 | size_t length; | |
3560 | char *label; | |
3561 | ||
3562 | /* verify everything until the next '%' matches verbatim */ | |
3563 | sep = strchrnul(template_pos, '%'); | |
3564 | length = sep - template_pos; | |
3565 | if (strncmp(path_pos, template_pos, length)) | |
3566 | return 0; | |
3567 | ||
3568 | path_pos += length; | |
3569 | template_pos += length; | |
3570 | ||
3571 | if (!*template_pos) | |
3572 | break; | |
3573 | ||
3574 | /* We found the next '%' character. Everything up until here | |
3575 | * matched. We now skip ahead to the end of this label and make | |
3576 | * sure it matches the tail of the label in the path. Then we | |
3577 | * decode the string in-between and save it for later use. */ | |
3578 | ||
3579 | ++template_pos; /* skip over '%' */ | |
3580 | ||
3581 | sep = strchrnul(template_pos, '/'); | |
3582 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3583 | ||
3584 | /* verify the suffixes match */ | |
3585 | sep = strchrnul(path_pos, '/'); | |
3586 | if (sep - path_pos < (ssize_t)length || | |
3587 | strncmp(sep - length, template_pos, length)) | |
3588 | return 0; | |
3589 | ||
3590 | template_pos += length; /* skip over matched label */ | |
3591 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3592 | ||
3593 | /* store unescaped label for later use */ | |
3594 | label = bus_label_unescape_n(path_pos, length); | |
3595 | if (!label) | |
3596 | return -ENOMEM; | |
3597 | ||
3598 | r = strv_consume(&labels, label); | |
3599 | if (r < 0) | |
3600 | return r; | |
3601 | ||
3602 | path_pos = sep; /* skip decoded label and suffix */ | |
3603 | } | |
3604 | ||
3605 | /* end of template must match end of path */ | |
3606 | if (*path_pos) | |
3607 | return 0; | |
3608 | ||
3609 | /* copy the labels over to the caller */ | |
19932084 | 3610 | va_start(list, path_template); |
dfb815c3 DH |
3611 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3612 | char **arg; | |
3613 | ||
3614 | arg = va_arg(list, char **); | |
3615 | if (arg) | |
3616 | *arg = *label_pos; | |
3617 | else | |
3618 | free(*label_pos); | |
3619 | } | |
3620 | va_end(list); | |
3621 | ||
3622 | free(labels); | |
3623 | labels = NULL; | |
3624 | return 1; | |
3625 | } | |
3626 | ||
ae095f86 LP |
3627 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3628 | int r; | |
3629 | ||
3630 | assert_return(bus, -EINVAL); | |
ae095f86 | 3631 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3632 | |
3633 | if (!bus->is_kernel) | |
15411c0c | 3634 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3635 | |
3636 | if (!BUS_IS_OPEN(bus->state)) | |
3637 | return -ENOTCONN; | |
ae095f86 | 3638 | |
bd746b8b LP |
3639 | if (bus->rqueue_size > 0) |
3640 | return -EBUSY; | |
3641 | ||
14f862a5 LP |
3642 | if (bus->wqueue_size > 0) |
3643 | return -EBUSY; | |
3644 | ||
ae095f86 LP |
3645 | r = bus_kernel_try_close(bus); |
3646 | if (r < 0) | |
3647 | return r; | |
3648 | ||
3649 | sd_bus_close(bus); | |
3650 | return 0; | |
3651 | } | |
5972fe95 | 3652 | |
455971c1 | 3653 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3654 | assert_return(bus, -EINVAL); |
455971c1 | 3655 | assert_return(description, -EINVAL); |
f4b2933e | 3656 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3657 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3658 | ||
455971c1 | 3659 | *description = bus->description; |
5972fe95 LP |
3660 | return 0; |
3661 | } | |
fe3f22d1 DK |
3662 | |
3663 | int bus_get_root_path(sd_bus *bus) { | |
3664 | int r; | |
3665 | ||
3666 | if (bus->cgroup_root) | |
3667 | return 0; | |
3668 | ||
3669 | r = cg_get_root_path(&bus->cgroup_root); | |
3670 | if (r == -ENOENT) { | |
3671 | bus->cgroup_root = strdup("/"); | |
3672 | if (!bus->cgroup_root) | |
3673 | return -ENOMEM; | |
3674 | ||
3675 | r = 0; | |
3676 | } | |
3677 | ||
3678 | return r; | |
3679 | } | |
3acc1daf LP |
3680 | |
3681 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3682 | int r; | |
3683 | ||
3684 | assert_return(bus, -EINVAL); | |
3685 | assert_return(scope, -EINVAL); | |
3686 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3687 | ||
3688 | if (bus->is_kernel) { | |
3689 | _cleanup_free_ char *n = NULL; | |
3690 | const char *dash; | |
3691 | ||
3692 | r = bus_kernel_get_bus_name(bus, &n); | |
3693 | if (r < 0) | |
3694 | return r; | |
3695 | ||
3696 | if (streq(n, "0-system")) { | |
3697 | *scope = "system"; | |
5b820358 | 3698 | return 0; |
3acc1daf LP |
3699 | } |
3700 | ||
3701 | dash = strchr(n, '-'); | |
d2df88ff | 3702 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3703 | *scope = "user"; |
5b820358 | 3704 | return 0; |
3acc1daf LP |
3705 | } |
3706 | } | |
3707 | ||
3708 | if (bus->is_user) { | |
3709 | *scope = "user"; | |
5b820358 | 3710 | return 0; |
3acc1daf LP |
3711 | } |
3712 | ||
3713 | if (bus->is_system) { | |
3714 | *scope = "system"; | |
5b820358 LP |
3715 | return 0; |
3716 | } | |
3717 | ||
3718 | return -ENODATA; | |
3719 | } | |
3720 | ||
3721 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3722 | ||
3723 | assert_return(bus, -EINVAL); | |
3724 | assert_return(address, -EINVAL); | |
3725 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3726 | ||
3727 | if (bus->address) { | |
3728 | *address = bus->address; | |
3729 | return 0; | |
3acc1daf LP |
3730 | } |
3731 | ||
3732 | return -ENODATA; | |
3733 | } | |
224b3787 | 3734 | |
882897af | 3735 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3736 | assert_return(bus, -EINVAL); |
3737 | assert_return(mask, -EINVAL); | |
3738 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3739 | ||
3740 | *mask = bus->creds_mask; | |
3741 | return 0; | |
3742 | } | |
3743 | ||
882897af | 3744 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3745 | assert_return(bus, -EINVAL); |
3746 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3747 | ||
3748 | return bus->bus_client; | |
3749 | } | |
3750 | ||
882897af | 3751 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3752 | assert_return(bus, -EINVAL); |
3753 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3754 | ||
3755 | return bus->is_server; | |
3756 | } | |
3757 | ||
882897af | 3758 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3759 | assert_return(bus, -EINVAL); |
3760 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3761 | ||
3762 | return bus->anonymous_auth; | |
3763 | } | |
3764 | ||
882897af | 3765 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3766 | assert_return(bus, -EINVAL); |
3767 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3768 | ||
3769 | return bus->trusted; | |
3770 | } | |
3771 | ||
882897af | 3772 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3773 | assert_return(bus, -EINVAL); |
3774 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3775 | ||
3776 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3777 | } | |
fa2f8973 LP |
3778 | |
3779 | static void flush_close(sd_bus *bus) { | |
3780 | if (!bus) | |
3781 | return; | |
3782 | ||
3783 | /* Flushes and closes the specified bus. We take a ref before, | |
3784 | * to ensure the flushing does not cause the bus to be | |
3785 | * unreferenced. */ | |
3786 | ||
3787 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
3788 | } | |
3789 | ||
3790 | _public_ void sd_bus_default_flush_close(void) { | |
3791 | flush_close(default_starter_bus); | |
3792 | flush_close(default_user_bus); | |
3793 | flush_close(default_system_bus); | |
3794 | } |