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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 | 109 | assert(!b->track_queue); |
232f3677 | 110 | assert(!b->tracks); |
8f8f05a9 | 111 | |
19befb2d LP |
112 | b->state = BUS_CLOSED; |
113 | ||
40ca29a1 LP |
114 | sd_bus_detach_event(b); |
115 | ||
19befb2d LP |
116 | while ((s = b->slots)) { |
117 | /* At this point only floating slots can still be | |
118 | * around, because the non-floating ones keep a | |
119 | * reference to the bus, and we thus couldn't be | |
120 | * destructing right now... We forcibly disconnect the | |
121 | * slots here, so that they still can be referenced by | |
122 | * apps, but are dead. */ | |
123 | ||
124 | assert(s->floating); | |
125 | bus_slot_disconnect(s); | |
126 | sd_bus_slot_unref(s); | |
127 | } | |
128 | ||
f4d140e9 LP |
129 | if (b->default_bus_ptr) |
130 | *b->default_bus_ptr = NULL; | |
131 | ||
f54514f3 | 132 | bus_close_fds(b); |
de1c301e | 133 | |
63edf05e LP |
134 | if (b->kdbus_buffer) |
135 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
136 | ||
c4e6556c | 137 | free(b->label); |
de1c301e | 138 | free(b->rbuffer); |
89ffcd2a | 139 | free(b->unique_name); |
2181a7f5 | 140 | free(b->auth_buffer); |
89ffcd2a | 141 | free(b->address); |
e9a967f9 | 142 | free(b->kernel); |
a7893c6b | 143 | free(b->machine); |
8a0e0ed9 | 144 | free(b->fake_label); |
751bc6ac | 145 | free(b->cgroup_root); |
455971c1 | 146 | free(b->description); |
89ffcd2a | 147 | |
2fd9ae2e LP |
148 | free(b->exec_path); |
149 | strv_free(b->exec_argv); | |
150 | ||
2c93b4ef LP |
151 | close_many(b->fds, b->n_fds); |
152 | free(b->fds); | |
153 | ||
0e586eae | 154 | bus_reset_queues(b); |
de1c301e | 155 | |
c9fe4af7 | 156 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 157 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 158 | |
75a0da95 | 159 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
160 | bus_match_free(&b->match_callbacks); |
161 | ||
29ddb38f LP |
162 | hashmap_free_free(b->vtable_methods); |
163 | hashmap_free_free(b->vtable_properties); | |
164 | ||
19befb2d | 165 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
166 | hashmap_free(b->nodes); |
167 | ||
bc7fd8cd LP |
168 | bus_kernel_flush_memfd(b); |
169 | ||
45fbe937 LP |
170 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
171 | ||
de1c301e LP |
172 | free(b); |
173 | } | |
174 | ||
d9f644e2 | 175 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
176 | sd_bus *r; |
177 | ||
d6888822 | 178 | assert_return(ret, -EINVAL); |
021a1e78 | 179 | |
de1c301e LP |
180 | r = new0(sd_bus, 1); |
181 | if (!r) | |
021a1e78 | 182 | return -ENOMEM; |
de1c301e | 183 | |
e4ee6e5c | 184 | r->n_ref = REFCNT_INIT; |
e82c9509 | 185 | r->input_fd = r->output_fd = -1; |
de1c301e | 186 | r->message_version = 1; |
3310dfd5 | 187 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 188 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 189 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
df0ff127 | 190 | r->original_pid = getpid_cached(); |
de1c301e | 191 | |
45fbe937 LP |
192 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
193 | ||
de1c301e LP |
194 | /* We guarantee that wqueue always has space for at least one |
195 | * entry */ | |
821e0756 | 196 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 197 | free(r); |
021a1e78 | 198 | return -ENOMEM; |
de1c301e LP |
199 | } |
200 | ||
021a1e78 LP |
201 | *ret = r; |
202 | return 0; | |
203 | } | |
204 | ||
d9f644e2 | 205 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
206 | char *a; |
207 | ||
d6888822 LP |
208 | assert_return(bus, -EINVAL); |
209 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
210 | assert_return(address, -EINVAL); | |
211 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
212 | |
213 | a = strdup(address); | |
214 | if (!a) | |
215 | return -ENOMEM; | |
216 | ||
217 | free(bus->address); | |
218 | bus->address = a; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
d9f644e2 | 223 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
224 | assert_return(bus, -EINVAL); |
225 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
226 | assert_return(input_fd >= 0, -EBADF); |
227 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 228 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 229 | |
e82c9509 LP |
230 | bus->input_fd = input_fd; |
231 | bus->output_fd = output_fd; | |
021a1e78 LP |
232 | return 0; |
233 | } | |
234 | ||
d9f644e2 | 235 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
236 | char *p, **a; |
237 | ||
d6888822 LP |
238 | assert_return(bus, -EINVAL); |
239 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
240 | assert_return(path, -EINVAL); | |
241 | assert_return(!strv_isempty(argv), -EINVAL); | |
242 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
243 | |
244 | p = strdup(path); | |
245 | if (!p) | |
246 | return -ENOMEM; | |
247 | ||
248 | a = strv_copy(argv); | |
249 | if (!a) { | |
250 | free(p); | |
251 | return -ENOMEM; | |
252 | } | |
253 | ||
254 | free(bus->exec_path); | |
255 | strv_free(bus->exec_argv); | |
256 | ||
257 | bus->exec_path = p; | |
258 | bus->exec_argv = a; | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
d9f644e2 | 263 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
264 | assert_return(bus, -EINVAL); |
265 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
266 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 267 | |
94bbf1ba | 268 | bus->bus_client = !!b; |
021a1e78 LP |
269 | return 0; |
270 | } | |
271 | ||
09365592 LP |
272 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
273 | assert_return(bus, -EINVAL); | |
274 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
275 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
276 | ||
277 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
278 | return 0; | |
279 | } | |
280 | ||
d9f644e2 | 281 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
282 | assert_return(bus, -EINVAL); |
283 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
284 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 285 | |
264ad849 LP |
286 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
287 | return 0; | |
288 | } | |
289 | ||
4fc31988 | 290 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 291 | uint64_t new_flags; |
16be4368 | 292 | assert_return(bus, -EINVAL); |
b5dae4c7 | 293 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
294 | assert_return(!bus_pid_changed(bus), -ECHILD); |
295 | ||
b5dae4c7 LP |
296 | new_flags = bus->attach_flags; |
297 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
298 | ||
299 | if (bus->attach_flags == new_flags) | |
300 | return 0; | |
301 | ||
302 | bus->attach_flags = new_flags; | |
303 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
304 | bus_kernel_realize_attach_flags(bus); | |
305 | ||
16be4368 KS |
306 | return 0; |
307 | } | |
308 | ||
b5dae4c7 LP |
309 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
310 | uint64_t new_flags; | |
311 | ||
16be4368 | 312 | assert_return(bus, -EINVAL); |
95c4fe82 | 313 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 314 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
315 | assert_return(!bus_pid_changed(bus), -ECHILD); |
316 | ||
5883ff60 | 317 | SET_FLAG(bus->creds_mask, mask, b); |
b5dae4c7 | 318 | |
49b832c5 | 319 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
320 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
321 | ||
322 | /* Make sure we don't lose the timestamp flag */ | |
323 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
324 | if (bus->attach_flags == new_flags) | |
325 | return 0; | |
49b832c5 | 326 | |
b5dae4c7 LP |
327 | bus->attach_flags = new_flags; |
328 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
329 | bus_kernel_realize_attach_flags(bus); | |
330 | ||
331 | return 0; | |
021a1e78 | 332 | } |
de1c301e | 333 | |
d9f644e2 | 334 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
335 | assert_return(bus, -EINVAL); |
336 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
337 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
338 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
339 | |
340 | bus->is_server = !!b; | |
98178d39 | 341 | bus->server_id = server_id; |
2181a7f5 LP |
342 | return 0; |
343 | } | |
344 | ||
d9f644e2 | 345 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
346 | assert_return(bus, -EINVAL); |
347 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
348 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
349 | |
350 | bus->anonymous_auth = !!b; | |
351 | return 0; | |
352 | } | |
353 | ||
adacb957 LP |
354 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
355 | assert_return(bus, -EINVAL); | |
356 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
357 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
358 | ||
359 | bus->trusted = !!b; | |
360 | return 0; | |
361 | } | |
362 | ||
455971c1 | 363 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 364 | assert_return(bus, -EINVAL); |
5972fe95 LP |
365 | assert_return(bus->state == BUS_UNSET, -EPERM); |
366 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
367 | ||
d1b91c99 | 368 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
369 | } |
370 | ||
c0765ddb LP |
371 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
372 | assert_return(bus, -EINVAL); | |
373 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
374 | ||
375 | bus->allow_interactive_authorization = !!b; | |
376 | return 0; | |
377 | } | |
378 | ||
379 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
380 | assert_return(bus, -EINVAL); | |
381 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
382 | ||
383 | return bus->allow_interactive_authorization; | |
384 | } | |
385 | ||
19070062 | 386 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 387 | const char *s; |
19070062 | 388 | sd_bus *bus; |
de1c301e LP |
389 | int r; |
390 | ||
19070062 LP |
391 | assert(reply); |
392 | bus = reply->bus; | |
de1c301e | 393 | assert(bus); |
c99c09a2 | 394 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 395 | |
40ca29a1 | 396 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
397 | if (r > 0) |
398 | return -r; | |
eb01ba5d | 399 | |
de1c301e LP |
400 | r = sd_bus_message_read(reply, "s", &s); |
401 | if (r < 0) | |
402 | return r; | |
403 | ||
dafb7591 LP |
404 | if (!service_name_is_valid(s) || s[0] != ':') |
405 | return -EBADMSG; | |
406 | ||
de1c301e LP |
407 | bus->unique_name = strdup(s); |
408 | if (!bus->unique_name) | |
409 | return -ENOMEM; | |
410 | ||
c99c09a2 LP |
411 | if (bus->state == BUS_HELLO) |
412 | bus->state = BUS_RUNNING; | |
dafb7591 | 413 | |
de1c301e LP |
414 | return 1; |
415 | } | |
416 | ||
417 | static int bus_send_hello(sd_bus *bus) { | |
4afd3348 | 418 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
de1c301e LP |
419 | int r; |
420 | ||
421 | assert(bus); | |
422 | ||
6629161f | 423 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
424 | return 0; |
425 | ||
de1c301e LP |
426 | r = sd_bus_message_new_method_call( |
427 | bus, | |
151b9b96 | 428 | &m, |
de1c301e | 429 | "org.freedesktop.DBus", |
a7639e37 | 430 | "/org/freedesktop/DBus", |
de1c301e | 431 | "org.freedesktop.DBus", |
151b9b96 | 432 | "Hello"); |
de1c301e LP |
433 | if (r < 0) |
434 | return r; | |
435 | ||
19befb2d | 436 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
437 | } |
438 | ||
a7e3212d | 439 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
440 | assert(bus); |
441 | ||
f08838da | 442 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 443 | bus->state = BUS_HELLO; |
e3017af9 | 444 | return 1; |
de1c301e LP |
445 | } |
446 | ||
447 | bus->state = BUS_RUNNING; | |
e3017af9 | 448 | return 1; |
de1c301e LP |
449 | } |
450 | ||
451 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 452 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
453 | const char *a; |
454 | char *r = NULL; | |
455 | ||
456 | assert(p); | |
457 | assert(*p); | |
de1c301e LP |
458 | assert(value); |
459 | ||
2fd9ae2e LP |
460 | if (key) { |
461 | l = strlen(key); | |
462 | if (strncmp(*p, key, l) != 0) | |
463 | return 0; | |
de1c301e | 464 | |
2fd9ae2e LP |
465 | if ((*p)[l] != '=') |
466 | return 0; | |
de1c301e | 467 | |
2fd9ae2e LP |
468 | if (*value) |
469 | return -EINVAL; | |
de1c301e | 470 | |
2fd9ae2e LP |
471 | a = *p + l + 1; |
472 | } else | |
473 | a = *p; | |
474 | ||
475 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 476 | char c; |
de1c301e LP |
477 | |
478 | if (*a == '%') { | |
479 | int x, y; | |
480 | ||
481 | x = unhexchar(a[1]); | |
482 | if (x < 0) { | |
483 | free(r); | |
484 | return x; | |
485 | } | |
486 | ||
487 | y = unhexchar(a[2]); | |
488 | if (y < 0) { | |
489 | free(r); | |
490 | return y; | |
491 | } | |
492 | ||
de1c301e | 493 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
494 | a += 3; |
495 | } else { | |
de1c301e | 496 | c = *a; |
89ffcd2a LP |
497 | a++; |
498 | } | |
de1c301e | 499 | |
821e0756 | 500 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 501 | return -ENOMEM; |
de1c301e | 502 | |
de1c301e LP |
503 | r[n++] = c; |
504 | } | |
505 | ||
89ffcd2a LP |
506 | if (!r) { |
507 | r = strdup(""); | |
508 | if (!r) | |
509 | return -ENOMEM; | |
510 | } else | |
511 | r[n] = 0; | |
512 | ||
513 | if (*a == ',') | |
514 | a++; | |
515 | ||
de1c301e | 516 | *p = a; |
2fd9ae2e LP |
517 | |
518 | free(*value); | |
de1c301e | 519 | *value = r; |
2fd9ae2e | 520 | |
de1c301e LP |
521 | return 1; |
522 | } | |
523 | ||
524 | static void skip_address_key(const char **p) { | |
525 | assert(p); | |
526 | assert(*p); | |
527 | ||
89ffcd2a LP |
528 | *p += strcspn(*p, ","); |
529 | ||
530 | if (**p == ',') | |
313cefa1 | 531 | (*p)++; |
de1c301e LP |
532 | } |
533 | ||
2fd9ae2e LP |
534 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
535 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
536 | size_t l; | |
de1c301e LP |
537 | int r; |
538 | ||
539 | assert(b); | |
2fd9ae2e LP |
540 | assert(p); |
541 | assert(*p); | |
542 | assert(guid); | |
de1c301e | 543 | |
2fd9ae2e LP |
544 | while (**p != 0 && **p != ';') { |
545 | r = parse_address_key(p, "guid", guid); | |
546 | if (r < 0) | |
547 | return r; | |
548 | else if (r > 0) | |
549 | continue; | |
de1c301e | 550 | |
2fd9ae2e LP |
551 | r = parse_address_key(p, "path", &path); |
552 | if (r < 0) | |
553 | return r; | |
554 | else if (r > 0) | |
555 | continue; | |
de1c301e | 556 | |
2fd9ae2e LP |
557 | r = parse_address_key(p, "abstract", &abstract); |
558 | if (r < 0) | |
559 | return r; | |
560 | else if (r > 0) | |
561 | continue; | |
de1c301e | 562 | |
2fd9ae2e LP |
563 | skip_address_key(p); |
564 | } | |
de1c301e | 565 | |
2fd9ae2e LP |
566 | if (!path && !abstract) |
567 | return -EINVAL; | |
de1c301e | 568 | |
2fd9ae2e LP |
569 | if (path && abstract) |
570 | return -EINVAL; | |
571 | ||
572 | if (path) { | |
573 | l = strlen(path); | |
574 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
575 | return -E2BIG; | |
de1c301e | 576 | |
2fd9ae2e LP |
577 | b->sockaddr.un.sun_family = AF_UNIX; |
578 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
579 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
580 | } else if (abstract) { | |
581 | l = strlen(abstract); | |
582 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
583 | return -E2BIG; | |
584 | ||
585 | b->sockaddr.un.sun_family = AF_UNIX; | |
586 | b->sockaddr.un.sun_path[0] = 0; | |
587 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
588 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
589 | } | |
590 | ||
694859b5 LP |
591 | b->is_local = true; |
592 | ||
2fd9ae2e LP |
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 | ||
694859b5 LP |
660 | b->is_local = false; |
661 | ||
2fd9ae2e LP |
662 | return 0; |
663 | } | |
664 | ||
665 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
666 | char *path = NULL; | |
667 | unsigned n_argv = 0, j; | |
668 | char **argv = NULL; | |
821e0756 | 669 | size_t allocated = 0; |
2fd9ae2e LP |
670 | int r; |
671 | ||
672 | assert(b); | |
673 | assert(p); | |
674 | assert(*p); | |
675 | assert(guid); | |
676 | ||
677 | while (**p != 0 && **p != ';') { | |
678 | r = parse_address_key(p, "guid", guid); | |
679 | if (r < 0) | |
680 | goto fail; | |
681 | else if (r > 0) | |
682 | continue; | |
683 | ||
684 | r = parse_address_key(p, "path", &path); | |
685 | if (r < 0) | |
686 | goto fail; | |
687 | else if (r > 0) | |
688 | continue; | |
689 | ||
690 | if (startswith(*p, "argv")) { | |
691 | unsigned ul; | |
692 | ||
693 | errno = 0; | |
694 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 695 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
696 | r = -EINVAL; |
697 | goto fail; | |
698 | } | |
699 | ||
313cefa1 | 700 | (*p)++; |
2fd9ae2e LP |
701 | |
702 | if (ul >= n_argv) { | |
821e0756 | 703 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
704 | r = -ENOMEM; |
705 | goto fail; | |
706 | } | |
707 | ||
2fd9ae2e LP |
708 | n_argv = ul + 1; |
709 | } | |
710 | ||
711 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 712 | if (r < 0) |
2fd9ae2e | 713 | goto fail; |
de1c301e | 714 | |
2fd9ae2e | 715 | continue; |
de1c301e LP |
716 | } |
717 | ||
2fd9ae2e LP |
718 | skip_address_key(p); |
719 | } | |
de1c301e | 720 | |
5a0f6033 LP |
721 | if (!path) { |
722 | r = -EINVAL; | |
2fd9ae2e | 723 | goto fail; |
5a0f6033 | 724 | } |
de1c301e | 725 | |
2fd9ae2e LP |
726 | /* Make sure there are no holes in the array, with the |
727 | * exception of argv[0] */ | |
728 | for (j = 1; j < n_argv; j++) | |
729 | if (!argv[j]) { | |
730 | r = -EINVAL; | |
731 | goto fail; | |
732 | } | |
733 | ||
734 | if (argv && argv[0] == NULL) { | |
735 | argv[0] = strdup(path); | |
736 | if (!argv[0]) { | |
737 | r = -ENOMEM; | |
738 | goto fail; | |
739 | } | |
740 | } | |
de1c301e | 741 | |
2fd9ae2e LP |
742 | b->exec_path = path; |
743 | b->exec_argv = argv; | |
694859b5 LP |
744 | |
745 | b->is_local = false; | |
746 | ||
2fd9ae2e | 747 | return 0; |
de1c301e | 748 | |
2fd9ae2e LP |
749 | fail: |
750 | for (j = 0; j < n_argv; j++) | |
751 | free(argv[j]); | |
752 | ||
753 | free(argv); | |
754 | free(path); | |
755 | return r; | |
756 | } | |
757 | ||
6629161f LP |
758 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
759 | _cleanup_free_ char *path = NULL; | |
760 | int r; | |
761 | ||
762 | assert(b); | |
763 | assert(p); | |
764 | assert(*p); | |
765 | assert(guid); | |
766 | ||
767 | while (**p != 0 && **p != ';') { | |
768 | r = parse_address_key(p, "guid", guid); | |
769 | if (r < 0) | |
770 | return r; | |
771 | else if (r > 0) | |
772 | continue; | |
773 | ||
774 | r = parse_address_key(p, "path", &path); | |
775 | if (r < 0) | |
776 | return r; | |
777 | else if (r > 0) | |
778 | continue; | |
779 | ||
780 | skip_address_key(p); | |
781 | } | |
782 | ||
783 | if (!path) | |
784 | return -EINVAL; | |
785 | ||
786 | free(b->kernel); | |
787 | b->kernel = path; | |
788 | path = NULL; | |
789 | ||
694859b5 LP |
790 | b->is_local = true; |
791 | ||
6629161f LP |
792 | return 0; |
793 | } | |
794 | ||
bc9fd78c | 795 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 796 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
797 | int r; |
798 | ||
799 | assert(b); | |
800 | assert(p); | |
801 | assert(*p); | |
802 | assert(guid); | |
803 | ||
804 | while (**p != 0 && **p != ';') { | |
805 | r = parse_address_key(p, "guid", guid); | |
806 | if (r < 0) | |
807 | return r; | |
808 | else if (r > 0) | |
809 | continue; | |
810 | ||
811 | r = parse_address_key(p, "machine", &machine); | |
812 | if (r < 0) | |
813 | return r; | |
814 | else if (r > 0) | |
815 | continue; | |
816 | ||
ee502e0c LP |
817 | r = parse_address_key(p, "pid", &pid); |
818 | if (r < 0) | |
819 | return r; | |
820 | else if (r > 0) | |
821 | continue; | |
822 | ||
a7893c6b LP |
823 | skip_address_key(p); |
824 | } | |
825 | ||
ee502e0c | 826 | if (!machine == !pid) |
a7893c6b LP |
827 | return -EINVAL; |
828 | ||
ee502e0c LP |
829 | if (machine) { |
830 | if (!machine_name_is_valid(machine)) | |
831 | return -EINVAL; | |
b6741478 | 832 | |
ee502e0c LP |
833 | free(b->machine); |
834 | b->machine = machine; | |
835 | machine = NULL; | |
836 | } else { | |
a1e58e8e | 837 | b->machine = mfree(b->machine); |
ee502e0c LP |
838 | } |
839 | ||
840 | if (pid) { | |
841 | r = parse_pid(pid, &b->nspid); | |
842 | if (r < 0) | |
843 | return r; | |
844 | } else | |
845 | b->nspid = 0; | |
a7893c6b LP |
846 | |
847 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 | 848 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
fc2fffe7 | 849 | b->sockaddr_size = SOCKADDR_UN_LEN(b->sockaddr.un); |
694859b5 | 850 | b->is_local = false; |
a7893c6b LP |
851 | |
852 | return 0; | |
853 | } | |
854 | ||
bc9fd78c | 855 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 856 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
857 | int r; |
858 | ||
859 | assert(b); | |
860 | assert(p); | |
861 | assert(*p); | |
862 | assert(guid); | |
863 | ||
864 | while (**p != 0 && **p != ';') { | |
865 | r = parse_address_key(p, "guid", guid); | |
866 | if (r < 0) | |
867 | return r; | |
868 | else if (r > 0) | |
869 | continue; | |
870 | ||
871 | r = parse_address_key(p, "machine", &machine); | |
872 | if (r < 0) | |
873 | return r; | |
874 | else if (r > 0) | |
875 | continue; | |
876 | ||
ee502e0c LP |
877 | r = parse_address_key(p, "pid", &pid); |
878 | if (r < 0) | |
879 | return r; | |
880 | else if (r > 0) | |
881 | continue; | |
882 | ||
bc9fd78c LP |
883 | skip_address_key(p); |
884 | } | |
885 | ||
ee502e0c | 886 | if (!machine == !pid) |
bc9fd78c LP |
887 | return -EINVAL; |
888 | ||
ee502e0c LP |
889 | if (machine) { |
890 | if (!machine_name_is_valid(machine)) | |
891 | return -EINVAL; | |
bc9fd78c | 892 | |
ee502e0c LP |
893 | free(b->machine); |
894 | b->machine = machine; | |
895 | machine = NULL; | |
896 | } else { | |
a1e58e8e | 897 | b->machine = mfree(b->machine); |
ee502e0c LP |
898 | } |
899 | ||
900 | if (pid) { | |
901 | r = parse_pid(pid, &b->nspid); | |
902 | if (r < 0) | |
903 | return r; | |
904 | } else | |
905 | b->nspid = 0; | |
bc9fd78c | 906 | |
2fc09a9c DM |
907 | r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); |
908 | if (r < 0) | |
909 | return r; | |
bc9fd78c | 910 | |
694859b5 LP |
911 | b->is_local = false; |
912 | ||
bc9fd78c LP |
913 | return 0; |
914 | } | |
915 | ||
2fd9ae2e LP |
916 | static void bus_reset_parsed_address(sd_bus *b) { |
917 | assert(b); | |
918 | ||
919 | zero(b->sockaddr); | |
920 | b->sockaddr_size = 0; | |
ba243e51 NK |
921 | b->exec_argv = strv_free(b->exec_argv); |
922 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 923 | b->server_id = SD_ID128_NULL; |
ba243e51 NK |
924 | b->kernel = mfree(b->kernel); |
925 | b->machine = mfree(b->machine); | |
ee502e0c | 926 | b->nspid = 0; |
2fd9ae2e LP |
927 | } |
928 | ||
929 | static int bus_parse_next_address(sd_bus *b) { | |
930 | _cleanup_free_ char *guid = NULL; | |
931 | const char *a; | |
932 | int r; | |
933 | ||
934 | assert(b); | |
935 | ||
936 | if (!b->address) | |
937 | return 0; | |
938 | if (b->address[b->address_index] == 0) | |
939 | return 0; | |
940 | ||
941 | bus_reset_parsed_address(b); | |
942 | ||
943 | a = b->address + b->address_index; | |
de1c301e | 944 | |
2fd9ae2e | 945 | while (*a != 0) { |
de1c301e | 946 | |
2fd9ae2e LP |
947 | if (*a == ';') { |
948 | a++; | |
949 | continue; | |
de1c301e LP |
950 | } |
951 | ||
2fd9ae2e LP |
952 | if (startswith(a, "unix:")) { |
953 | a += 5; | |
de1c301e | 954 | |
2fd9ae2e | 955 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
956 | if (r < 0) |
957 | return r; | |
2fd9ae2e | 958 | break; |
de1c301e | 959 | |
2fd9ae2e | 960 | } else if (startswith(a, "tcp:")) { |
de1c301e | 961 | |
2fd9ae2e LP |
962 | a += 4; |
963 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
964 | if (r < 0) |
965 | return r; | |
de1c301e | 966 | |
2fd9ae2e LP |
967 | break; |
968 | ||
969 | } else if (startswith(a, "unixexec:")) { | |
970 | ||
971 | a += 9; | |
972 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
973 | if (r < 0) |
974 | return r; | |
de1c301e | 975 | |
2fd9ae2e | 976 | break; |
de1c301e | 977 | |
6629161f LP |
978 | } else if (startswith(a, "kernel:")) { |
979 | ||
980 | a += 7; | |
981 | r = parse_kernel_address(b, &a, &guid); | |
982 | if (r < 0) | |
983 | return r; | |
984 | ||
a7893c6b | 985 | break; |
de33fc62 | 986 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 987 | |
146d4773 | 988 | a += 15; |
bc9fd78c LP |
989 | r = parse_container_unix_address(b, &a, &guid); |
990 | if (r < 0) | |
991 | return r; | |
992 | ||
993 | break; | |
de33fc62 | 994 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 995 | |
146d4773 | 996 | a += 17; |
bc9fd78c | 997 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
998 | if (r < 0) |
999 | return r; | |
1000 | ||
6629161f | 1001 | break; |
de1c301e LP |
1002 | } |
1003 | ||
2fd9ae2e LP |
1004 | a = strchr(a, ';'); |
1005 | if (!a) | |
1006 | return 0; | |
de1c301e LP |
1007 | } |
1008 | ||
1009 | if (guid) { | |
98178d39 | 1010 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
1011 | if (r < 0) |
1012 | return r; | |
1013 | } | |
1014 | ||
2fd9ae2e | 1015 | b->address_index = a - b->address; |
de1c301e LP |
1016 | return 1; |
1017 | } | |
1018 | ||
a7e3212d | 1019 | static int bus_start_address(sd_bus *b) { |
15442912 DH |
1020 | bool container_kdbus_available = false; |
1021 | bool kdbus_available = false; | |
2fd9ae2e LP |
1022 | int r; |
1023 | ||
1024 | assert(b); | |
1025 | ||
1026 | for (;;) { | |
1e05d493 | 1027 | bool skipped = false; |
2fd9ae2e | 1028 | |
1e05d493 | 1029 | bus_close_fds(b); |
a7e3212d | 1030 | |
15442912 DH |
1031 | /* |
1032 | * Usually, if you provide multiple different bus-addresses, we | |
1033 | * try all of them in order. We use the first one that | |
1034 | * succeeds. However, if you mix kernel and unix addresses, we | |
1035 | * never try unix-addresses if a previous kernel address was | |
1036 | * tried and kdbus was available. This is required to prevent | |
1037 | * clients to fallback to the bus-proxy if kdbus is available | |
1038 | * but failed (eg., too many connections). | |
1039 | */ | |
1040 | ||
1e05d493 | 1041 | if (b->exec_path) |
a7893c6b | 1042 | r = bus_socket_exec(b); |
15442912 | 1043 | else if ((b->nspid > 0 || b->machine) && b->kernel) { |
bc9fd78c | 1044 | r = bus_container_connect_kernel(b); |
15442912 DH |
1045 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1046 | container_kdbus_available = true; | |
751090cc LP |
1047 | |
1048 | } else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1049 | if (!container_kdbus_available) | |
1050 | r = bus_container_connect_socket(b); | |
1051 | else | |
1052 | skipped = true; | |
1053 | ||
1054 | } else if (b->kernel) { | |
a7893c6b | 1055 | r = bus_kernel_connect(b); |
15442912 DH |
1056 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1057 | kdbus_available = true; | |
751090cc LP |
1058 | |
1059 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1060 | if (!kdbus_available) | |
1061 | r = bus_socket_connect(b); | |
1062 | else | |
1063 | skipped = true; | |
751090cc | 1064 | } else |
1e05d493 LP |
1065 | skipped = true; |
1066 | ||
1067 | if (!skipped) { | |
1068 | if (r >= 0) { | |
1069 | r = attach_io_events(b); | |
1070 | if (r >= 0) | |
1071 | return r; | |
1072 | } | |
6629161f | 1073 | |
2fd9ae2e LP |
1074 | b->last_connect_error = -r; |
1075 | } | |
1076 | ||
1077 | r = bus_parse_next_address(b); | |
1078 | if (r < 0) | |
1079 | return r; | |
1080 | if (r == 0) | |
1081 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1082 | } |
1083 | } | |
1084 | ||
a7e3212d LP |
1085 | int bus_next_address(sd_bus *b) { |
1086 | assert(b); | |
1087 | ||
1088 | bus_reset_parsed_address(b); | |
1089 | return bus_start_address(b); | |
1090 | } | |
1091 | ||
021a1e78 | 1092 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1093 | struct stat st; |
021a1e78 LP |
1094 | int r; |
1095 | ||
1096 | assert(b); | |
e82c9509 LP |
1097 | assert(b->input_fd >= 0); |
1098 | assert(b->output_fd >= 0); | |
021a1e78 | 1099 | |
e82c9509 | 1100 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1101 | if (r < 0) |
1102 | return r; | |
1103 | ||
e82c9509 | 1104 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1105 | if (r < 0) |
1106 | return r; | |
1107 | ||
e82c9509 LP |
1108 | if (b->input_fd != b->output_fd) { |
1109 | r = fd_nonblock(b->output_fd, true); | |
1110 | if (r < 0) | |
1111 | return r; | |
1112 | ||
1113 | r = fd_cloexec(b->output_fd, true); | |
1114 | if (r < 0) | |
1115 | return r; | |
1116 | } | |
1117 | ||
6629161f LP |
1118 | if (fstat(b->input_fd, &st) < 0) |
1119 | return -errno; | |
1120 | ||
1121 | if (S_ISCHR(b->input_fd)) | |
1122 | return bus_kernel_take_fd(b); | |
1123 | else | |
1124 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1125 | } |
1126 | ||
d9f644e2 | 1127 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1128 | int r; |
1129 | ||
d6888822 LP |
1130 | assert_return(bus, -EINVAL); |
1131 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1132 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1133 | |
1134 | bus->state = BUS_OPENING; | |
1135 | ||
2181a7f5 LP |
1136 | if (bus->is_server && bus->bus_client) |
1137 | return -EINVAL; | |
1138 | ||
e82c9509 | 1139 | if (bus->input_fd >= 0) |
021a1e78 | 1140 | r = bus_start_fd(bus); |
a7893c6b | 1141 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1142 | r = bus_start_address(bus); |
021a1e78 LP |
1143 | else |
1144 | return -EINVAL; | |
1145 | ||
db9bb83f LP |
1146 | if (r < 0) { |
1147 | sd_bus_close(bus); | |
021a1e78 | 1148 | return r; |
db9bb83f | 1149 | } |
021a1e78 LP |
1150 | |
1151 | return bus_send_hello(bus); | |
1152 | } | |
1153 | ||
af08d2f9 LP |
1154 | _public_ int sd_bus_open(sd_bus **ret) { |
1155 | const char *e; | |
1156 | sd_bus *b; | |
1157 | int r; | |
1158 | ||
1159 | assert_return(ret, -EINVAL); | |
1160 | ||
1161 | /* Let's connect to the starter bus if it is set, and | |
1162 | * otherwise to the bus that is appropropriate for the scope | |
1163 | * we are running in */ | |
1164 | ||
1165 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1166 | if (e) { | |
1167 | if (streq(e, "system")) | |
1168 | return sd_bus_open_system(ret); | |
09365592 | 1169 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1170 | return sd_bus_open_user(ret); |
1171 | } | |
1172 | ||
1173 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1174 | if (!e) { | |
1175 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1176 | return sd_bus_open_user(ret); | |
1177 | else | |
1178 | return sd_bus_open_system(ret); | |
1179 | } | |
1180 | ||
1181 | r = sd_bus_new(&b); | |
1182 | if (r < 0) | |
1183 | return r; | |
1184 | ||
1185 | r = sd_bus_set_address(b, e); | |
1186 | if (r < 0) | |
1187 | goto fail; | |
1188 | ||
1189 | b->bus_client = true; | |
1190 | ||
1191 | /* We don't know whether the bus is trusted or not, so better | |
1192 | * be safe, and authenticate everything */ | |
1193 | b->trusted = false; | |
694859b5 | 1194 | b->is_local = false; |
cf226cfc LP |
1195 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1196 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1197 | |
1198 | r = sd_bus_start(b); | |
1199 | if (r < 0) | |
1200 | goto fail; | |
1201 | ||
1202 | *ret = b; | |
1203 | return 0; | |
1204 | ||
1205 | fail: | |
1206 | bus_free(b); | |
1207 | return r; | |
1208 | } | |
1209 | ||
09365592 | 1210 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1211 | const char *e; |
09365592 LP |
1212 | assert(b); |
1213 | ||
1214 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1215 | if (e) | |
1216 | return sd_bus_set_address(b, e); | |
1217 | ||
057171ef | 1218 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1219 | } |
1220 | ||
1221 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1222 | sd_bus *b; |
1223 | int r; | |
1224 | ||
d6888822 | 1225 | assert_return(ret, -EINVAL); |
de1c301e | 1226 | |
021a1e78 LP |
1227 | r = sd_bus_new(&b); |
1228 | if (r < 0) | |
1229 | return r; | |
1230 | ||
09365592 | 1231 | r = bus_set_address_system(b); |
e3dd987c LP |
1232 | if (r < 0) |
1233 | goto fail; | |
de1c301e | 1234 | |
94bbf1ba | 1235 | b->bus_client = true; |
5972fe95 | 1236 | b->is_system = true; |
021a1e78 | 1237 | |
adacb957 LP |
1238 | /* Let's do per-method access control on the system bus. We |
1239 | * need the caller's UID and capability set for that. */ | |
1240 | b->trusted = false; | |
1241 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1242 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
694859b5 | 1243 | b->is_local = true; |
adacb957 | 1244 | |
021a1e78 LP |
1245 | r = sd_bus_start(b); |
1246 | if (r < 0) | |
1247 | goto fail; | |
de1c301e LP |
1248 | |
1249 | *ret = b; | |
1250 | return 0; | |
021a1e78 LP |
1251 | |
1252 | fail: | |
1253 | bus_free(b); | |
1254 | return r; | |
de1c301e LP |
1255 | } |
1256 | ||
09365592 | 1257 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1258 | const char *e; |
64ce4ad7 DH |
1259 | uid_t uid; |
1260 | int r; | |
de1c301e | 1261 | |
09365592 | 1262 | assert(b); |
021a1e78 | 1263 | |
6c03089c | 1264 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1265 | if (e) |
1266 | return sd_bus_set_address(b, e); | |
1267 | ||
64ce4ad7 DH |
1268 | r = cg_pid_get_owner_uid(0, &uid); |
1269 | if (r < 0) | |
1270 | uid = getuid(); | |
1271 | ||
09365592 | 1272 | e = secure_getenv("XDG_RUNTIME_DIR"); |
057171ef | 1273 | if (e) { |
09365592 | 1274 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1275 | |
09365592 LP |
1276 | ee = bus_address_escape(e); |
1277 | if (!ee) | |
1278 | return -ENOMEM; | |
e3dd987c | 1279 | |
64ce4ad7 | 1280 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, uid, ee); |
057171ef | 1281 | } else |
64ce4ad7 | 1282 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, uid); |
de1c301e | 1283 | |
09365592 LP |
1284 | if (!b->address) |
1285 | return -ENOMEM; | |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1291 | sd_bus *b; | |
1292 | int r; | |
1293 | ||
1294 | assert_return(ret, -EINVAL); | |
1295 | ||
1296 | r = sd_bus_new(&b); | |
1297 | if (r < 0) | |
1298 | return r; | |
1299 | ||
1300 | r = bus_set_address_user(b); | |
1301 | if (r < 0) | |
1302 | return r; | |
1303 | ||
94bbf1ba | 1304 | b->bus_client = true; |
5972fe95 | 1305 | b->is_user = true; |
de1c301e | 1306 | |
adacb957 LP |
1307 | /* We don't do any per-method access control on the user |
1308 | * bus. */ | |
1309 | b->trusted = true; | |
694859b5 | 1310 | b->is_local = true; |
adacb957 | 1311 | |
021a1e78 | 1312 | r = sd_bus_start(b); |
2571ead1 LP |
1313 | if (r < 0) |
1314 | goto fail; | |
de1c301e LP |
1315 | |
1316 | *ret = b; | |
1317 | return 0; | |
2571ead1 LP |
1318 | |
1319 | fail: | |
021a1e78 | 1320 | bus_free(b); |
2571ead1 | 1321 | return r; |
de1c301e LP |
1322 | } |
1323 | ||
09365592 | 1324 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1325 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1326 | char *m = NULL, *c = NULL; |
0f8bd8de | 1327 | |
09365592 LP |
1328 | assert(b); |
1329 | assert(host); | |
0f8bd8de | 1330 | |
7f0d207d LP |
1331 | /* Let's see if we shall enter some container */ |
1332 | m = strchr(host, ':'); | |
1333 | if (m) { | |
1334 | m++; | |
1335 | ||
1336 | /* Let's make sure this is not a port of some kind, | |
1337 | * and is a valid machine name. */ | |
1338 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1339 | char *t; | |
1340 | ||
1341 | /* Cut out the host part */ | |
1342 | t = strndupa(host, m - host - 1); | |
1343 | e = bus_address_escape(t); | |
1344 | if (!e) | |
1345 | return -ENOMEM; | |
1346 | ||
63c372cb | 1347 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1348 | } |
1349 | } | |
1350 | ||
1351 | if (!e) { | |
1352 | e = bus_address_escape(host); | |
1353 | if (!e) | |
1354 | return -ENOMEM; | |
1355 | } | |
0f8bd8de | 1356 | |
605405c6 | 1357 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c); |
09365592 | 1358 | if (!b->address) |
0f8bd8de | 1359 | return -ENOMEM; |
a7893c6b | 1360 | |
09365592 LP |
1361 | return 0; |
1362 | } | |
1363 | ||
1364 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1365 | sd_bus *bus; | |
1366 | int r; | |
1367 | ||
1368 | assert_return(host, -EINVAL); | |
1369 | assert_return(ret, -EINVAL); | |
1370 | ||
a7893c6b | 1371 | r = sd_bus_new(&bus); |
09365592 | 1372 | if (r < 0) |
a7893c6b | 1373 | return r; |
a7893c6b | 1374 | |
09365592 LP |
1375 | r = bus_set_address_system_remote(bus, host); |
1376 | if (r < 0) | |
1377 | goto fail; | |
1378 | ||
a7893c6b | 1379 | bus->bus_client = true; |
09365592 | 1380 | bus->trusted = false; |
3acc1daf | 1381 | bus->is_system = true; |
694859b5 | 1382 | bus->is_local = false; |
a7893c6b LP |
1383 | |
1384 | r = sd_bus_start(bus); | |
09365592 LP |
1385 | if (r < 0) |
1386 | goto fail; | |
a7893c6b LP |
1387 | |
1388 | *ret = bus; | |
1389 | return 0; | |
09365592 LP |
1390 | |
1391 | fail: | |
1392 | bus_free(bus); | |
1393 | return r; | |
a7893c6b LP |
1394 | } |
1395 | ||
de33fc62 | 1396 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1397 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1398 | |
09365592 LP |
1399 | assert(b); |
1400 | assert(machine); | |
a7893c6b LP |
1401 | |
1402 | e = bus_address_escape(machine); | |
1403 | if (!e) | |
1404 | return -ENOMEM; | |
1405 | ||
605405c6 | 1406 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e); |
09365592 | 1407 | if (!b->address) |
a7893c6b | 1408 | return -ENOMEM; |
0f8bd8de | 1409 | |
09365592 LP |
1410 | return 0; |
1411 | } | |
1412 | ||
de33fc62 | 1413 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1414 | sd_bus *bus; |
1415 | int r; | |
1416 | ||
1417 | assert_return(machine, -EINVAL); | |
1418 | assert_return(ret, -EINVAL); | |
affcf189 | 1419 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1420 | |
0f8bd8de | 1421 | r = sd_bus_new(&bus); |
09365592 | 1422 | if (r < 0) |
0f8bd8de | 1423 | return r; |
0f8bd8de | 1424 | |
de33fc62 | 1425 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1426 | if (r < 0) |
1427 | goto fail; | |
1428 | ||
0f8bd8de | 1429 | bus->bus_client = true; |
09365592 | 1430 | bus->trusted = false; |
3acc1daf | 1431 | bus->is_system = true; |
694859b5 | 1432 | bus->is_local = false; |
0f8bd8de LP |
1433 | |
1434 | r = sd_bus_start(bus); | |
09365592 LP |
1435 | if (r < 0) |
1436 | goto fail; | |
0f8bd8de LP |
1437 | |
1438 | *ret = bus; | |
1439 | return 0; | |
09365592 LP |
1440 | |
1441 | fail: | |
1442 | bus_free(bus); | |
1443 | return r; | |
0f8bd8de LP |
1444 | } |
1445 | ||
d9f644e2 | 1446 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1447 | |
de1c301e LP |
1448 | if (!bus) |
1449 | return; | |
d5a2b9a6 LP |
1450 | if (bus->state == BUS_CLOSED) |
1451 | return; | |
1452 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1453 | return; |
1454 | ||
1455 | bus->state = BUS_CLOSED; | |
e82c9509 | 1456 | |
40ca29a1 LP |
1457 | sd_bus_detach_event(bus); |
1458 | ||
0e586eae LP |
1459 | /* Drop all queued messages so that they drop references to |
1460 | * the bus object and the bus may be freed */ | |
1461 | bus_reset_queues(bus); | |
1462 | ||
f54514f3 LP |
1463 | if (!bus->is_kernel) |
1464 | bus_close_fds(bus); | |
1465 | ||
1466 | /* We'll leave the fd open in case this is a kernel bus, since | |
1467 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1468 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1469 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1470 | } |
1471 | ||
03976f7b LP |
1472 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1473 | ||
1474 | if (!bus) | |
1475 | return NULL; | |
1476 | ||
1477 | sd_bus_flush(bus); | |
1478 | sd_bus_close(bus); | |
1479 | ||
1480 | return sd_bus_unref(bus); | |
1481 | } | |
1482 | ||
718db961 LP |
1483 | static void bus_enter_closing(sd_bus *bus) { |
1484 | assert(bus); | |
1485 | ||
1486 | if (bus->state != BUS_OPENING && | |
1487 | bus->state != BUS_AUTHENTICATING && | |
1488 | bus->state != BUS_HELLO && | |
1489 | bus->state != BUS_RUNNING) | |
1490 | return; | |
1491 | ||
1492 | bus->state = BUS_CLOSING; | |
1493 | } | |
1494 | ||
d9f644e2 | 1495 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
4afd3348 LP |
1496 | |
1497 | if (!bus) | |
1498 | return NULL; | |
de1c301e | 1499 | |
e4ee6e5c | 1500 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1501 | |
de1c301e LP |
1502 | return bus; |
1503 | } | |
1504 | ||
d9f644e2 | 1505 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1506 | unsigned i; |
5b1bc83f LP |
1507 | |
1508 | if (!bus) | |
1509 | return NULL; | |
de1c301e | 1510 | |
f389bf15 LP |
1511 | i = REFCNT_DEC(bus->n_ref); |
1512 | if (i > 0) | |
1513 | return NULL; | |
1514 | ||
1515 | bus_free(bus); | |
de1c301e LP |
1516 | return NULL; |
1517 | } | |
1518 | ||
d9f644e2 | 1519 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1520 | |
1521 | assert_return(bus, -EINVAL); | |
1522 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1523 | |
f54514f3 | 1524 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1525 | } |
1526 | ||
d9f644e2 | 1527 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1528 | int r; |
1529 | ||
d6888822 LP |
1530 | assert_return(bus, -EINVAL); |
1531 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1532 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1533 | |
09365592 LP |
1534 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1535 | return 0; | |
1536 | ||
d728d708 | 1537 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1538 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1539 | return 0; |
1540 | ||
20902f3e | 1541 | r = bus_ensure_running(bus); |
d728d708 LP |
1542 | if (r < 0) |
1543 | return r; | |
de1c301e | 1544 | |
d728d708 LP |
1545 | return bus->can_fds; |
1546 | } | |
1547 | ||
1548 | return bus_type_is_valid(type); | |
de1c301e LP |
1549 | } |
1550 | ||
5c302692 | 1551 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1552 | int r; |
de1c301e | 1553 | |
d6888822 | 1554 | assert_return(bus, -EINVAL); |
f7fce345 | 1555 | assert_return(id, -EINVAL); |
d6888822 | 1556 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1557 | |
20902f3e | 1558 | r = bus_ensure_running(bus); |
d728d708 LP |
1559 | if (r < 0) |
1560 | return r; | |
de1c301e | 1561 | |
f7fce345 | 1562 | *id = bus->server_id; |
d728d708 | 1563 | return 0; |
de1c301e LP |
1564 | } |
1565 | ||
3df7a7e6 | 1566 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1567 | assert(b); |
de1c301e LP |
1568 | assert(m); |
1569 | ||
aea93deb LP |
1570 | if (m->sealed) { |
1571 | /* If we copy the same message to multiple | |
693eb9a2 | 1572 | * destinations, avoid using the same cookie |
aea93deb | 1573 | * numbers. */ |
693eb9a2 | 1574 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1575 | return 0; |
aea93deb | 1576 | } |
de1c301e | 1577 | |
3df7a7e6 LP |
1578 | if (timeout == 0) |
1579 | timeout = BUS_DEFAULT_TIMEOUT; | |
1580 | ||
693eb9a2 | 1581 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1582 | } |
1583 | ||
e1c433c6 | 1584 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1585 | bool remarshal = false; |
1586 | ||
e1c433c6 LP |
1587 | assert(b); |
1588 | ||
908b8a42 DH |
1589 | /* wrong packet version */ |
1590 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1591 | remarshal = true; | |
1592 | ||
1593 | /* wrong packet endianness */ | |
1594 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1595 | remarshal = true; | |
1596 | ||
1597 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1598 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1599 | * force remarshaling of the message. Technically, we could just | |
1600 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1601 | * the message refer to m->kdbus already. This should be fixed! */ | |
1602 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1603 | remarshal = true; | |
e1c433c6 | 1604 | |
908b8a42 | 1605 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1606 | } |
1607 | ||
7adc46fc LP |
1608 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1609 | assert(b); | |
1610 | assert(m); | |
1611 | ||
52cd5877 LP |
1612 | /* Fake some timestamps, if they were requested, and not |
1613 | * already initialized */ | |
1614 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1615 | if (m->realtime <= 0) | |
1616 | m->realtime = now(CLOCK_REALTIME); | |
1617 | ||
1618 | if (m->monotonic <= 0) | |
1619 | m->monotonic = now(CLOCK_MONOTONIC); | |
1620 | } | |
1621 | ||
7adc46fc LP |
1622 | /* The bus specification says the serial number cannot be 0, |
1623 | * hence let's fill something in for synthetic messages. Since | |
1624 | * synthetic messages might have a fake sender and we don't | |
1625 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1626 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1627 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1628 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1629 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1630 | } |
1631 | ||
069f5e61 | 1632 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1633 | int r; |
1634 | ||
718db961 | 1635 | assert(bus); |
2e3db52d | 1636 | assert(m); |
718db961 LP |
1637 | |
1638 | if (bus->is_kernel) | |
069f5e61 | 1639 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1640 | else |
2e3db52d LP |
1641 | r = bus_socket_write_message(bus, m, idx); |
1642 | ||
1643 | if (r <= 0) | |
1644 | return r; | |
1645 | ||
90911bb6 | 1646 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1647 | 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 |
1648 | bus_message_type_to_string(m->header->type), |
1649 | strna(sd_bus_message_get_sender(m)), | |
1650 | strna(sd_bus_message_get_destination(m)), | |
1651 | strna(sd_bus_message_get_path(m)), | |
1652 | strna(sd_bus_message_get_interface(m)), | |
1653 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1654 | BUS_MESSAGE_COOKIE(m), |
1655 | m->reply_cookie, | |
2e3db52d LP |
1656 | strna(m->error.message)); |
1657 | ||
1658 | return r; | |
718db961 LP |
1659 | } |
1660 | ||
de1c301e | 1661 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1662 | int r, ret = 0; |
de1c301e LP |
1663 | |
1664 | assert(bus); | |
89ffcd2a | 1665 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1666 | |
de1c301e LP |
1667 | while (bus->wqueue_size > 0) { |
1668 | ||
069f5e61 | 1669 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1670 | if (r < 0) |
de1c301e | 1671 | return r; |
718db961 | 1672 | else if (r == 0) |
e3017af9 LP |
1673 | /* Didn't do anything this time */ |
1674 | return ret; | |
6629161f | 1675 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1676 | /* Fully written. Let's drop the entry from |
1677 | * the queue. | |
1678 | * | |
1679 | * This isn't particularly optimized, but | |
1680 | * well, this is supposed to be our worst-case | |
1681 | * buffer only, and the socket buffer is | |
1682 | * supposed to be our primary buffer, and if | |
1683 | * it got full, then all bets are off | |
1684 | * anyway. */ | |
1685 | ||
313cefa1 | 1686 | bus->wqueue_size--; |
c4e6e242 | 1687 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1688 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1689 | bus->windex = 0; | |
1690 | ||
e3017af9 | 1691 | ret = 1; |
de1c301e LP |
1692 | } |
1693 | } | |
1694 | ||
e3017af9 | 1695 | return ret; |
de1c301e LP |
1696 | } |
1697 | ||
766c5809 | 1698 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1699 | assert(bus); |
1700 | ||
1701 | if (bus->is_kernel) | |
766c5809 | 1702 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1703 | else |
1704 | return bus_socket_read_message(bus); | |
1705 | } | |
1706 | ||
7adc46fc | 1707 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1708 | assert(bus); |
7d22c717 | 1709 | |
821e0756 | 1710 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1711 | return -ENOBUFS; |
1712 | ||
821e0756 | 1713 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1714 | return -ENOMEM; |
1715 | ||
7d22c717 LP |
1716 | return 0; |
1717 | } | |
1718 | ||
766c5809 | 1719 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1720 | int r, ret = 0; |
de1c301e LP |
1721 | |
1722 | assert(bus); | |
1723 | assert(m); | |
89ffcd2a | 1724 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1725 | |
766c5809 LP |
1726 | /* Note that the priority logic is only available on kdbus, |
1727 | * where the rqueue is unused. We check the rqueue here | |
1728 | * anyway, because it's simple... */ | |
1729 | ||
7d22c717 LP |
1730 | for (;;) { |
1731 | if (bus->rqueue_size > 0) { | |
1732 | /* Dispatch a queued message */ | |
de1c301e | 1733 | |
7d22c717 | 1734 | *m = bus->rqueue[0]; |
313cefa1 | 1735 | bus->rqueue_size--; |
7d22c717 LP |
1736 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); |
1737 | return 1; | |
1738 | } | |
de1c301e | 1739 | |
7d22c717 | 1740 | /* Try to read a new message */ |
766c5809 | 1741 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1742 | if (r < 0) |
e3017af9 | 1743 | return r; |
e3017af9 LP |
1744 | if (r == 0) |
1745 | return ret; | |
de1c301e | 1746 | |
2e8d788c | 1747 | ret = 1; |
7d22c717 | 1748 | } |
de1c301e LP |
1749 | } |
1750 | ||
069f5e61 | 1751 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
4afd3348 | 1752 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1753 | int r; |
1754 | ||
d6888822 | 1755 | assert_return(m, -EINVAL); |
9030ca46 LP |
1756 | |
1757 | if (!bus) | |
1758 | bus = m->bus; | |
1759 | ||
d6888822 | 1760 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1761 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1762 | |
a3d59cd1 LP |
1763 | if (!BUS_IS_OPEN(bus->state)) |
1764 | return -ENOTCONN; | |
1765 | ||
021a1e78 LP |
1766 | if (m->n_fds > 0) { |
1767 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1768 | if (r < 0) | |
1769 | return r; | |
1770 | if (r == 0) | |
15411c0c | 1771 | return -EOPNOTSUPP; |
021a1e78 | 1772 | } |
de1c301e | 1773 | |
693eb9a2 | 1774 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1775 | * is expected */ |
693eb9a2 | 1776 | if (!cookie && !m->sealed) |
0461f8cd | 1777 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1778 | |
3df7a7e6 | 1779 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1780 | if (r < 0) |
1781 | return r; | |
1782 | ||
441d56a1 | 1783 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1784 | * message and place a replacement in m */ |
1785 | r = bus_remarshal_message(bus, &m); | |
1786 | if (r < 0) | |
1787 | return r; | |
1788 | ||
5407f2de LP |
1789 | /* If this is a reply and no reply was requested, then let's |
1790 | * suppress this, if we can */ | |
997eadb5 LP |
1791 | if (m->dont_send) |
1792 | goto finish; | |
5407f2de | 1793 | |
89ffcd2a | 1794 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1795 | size_t idx = 0; |
1796 | ||
069f5e61 | 1797 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1798 | if (r < 0) { |
103a5027 | 1799 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1800 | bus_enter_closing(bus); |
441d56a1 LP |
1801 | return -ECONNRESET; |
1802 | } | |
32f46480 | 1803 | |
de1c301e | 1804 | return r; |
997eadb5 LP |
1805 | } |
1806 | ||
1807 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1808 | /* Wasn't fully written. So let's remember how |
1809 | * much was written. Note that the first entry | |
1810 | * of the wqueue array is always allocated so | |
1811 | * that we always can remember how much was | |
1812 | * written. */ | |
1813 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1814 | bus->wqueue_size = 1; | |
1815 | bus->windex = idx; | |
1816 | } | |
997eadb5 | 1817 | |
de1c301e | 1818 | } else { |
de1c301e LP |
1819 | /* Just append it to the queue. */ |
1820 | ||
25220239 | 1821 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1822 | return -ENOBUFS; |
1823 | ||
821e0756 | 1824 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1825 | return -ENOMEM; |
1826 | ||
313cefa1 | 1827 | bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); |
de1c301e LP |
1828 | } |
1829 | ||
997eadb5 | 1830 | finish: |
693eb9a2 LP |
1831 | if (cookie) |
1832 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1833 | |
7a37d625 | 1834 | return 1; |
de1c301e LP |
1835 | } |
1836 | ||
069f5e61 LP |
1837 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1838 | return bus_send_internal(bus, m, cookie, false); | |
1839 | } | |
1840 | ||
693eb9a2 | 1841 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1842 | int r; |
1843 | ||
911121a7 | 1844 | assert_return(m, -EINVAL); |
9030ca46 LP |
1845 | |
1846 | if (!bus) | |
1847 | bus = m->bus; | |
1848 | ||
911121a7 LP |
1849 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1850 | ||
a3d59cd1 LP |
1851 | if (!BUS_IS_OPEN(bus->state)) |
1852 | return -ENOTCONN; | |
1853 | ||
911121a7 LP |
1854 | if (!streq_ptr(m->destination, destination)) { |
1855 | ||
1856 | if (!destination) | |
1857 | return -EEXIST; | |
1858 | ||
1859 | r = sd_bus_message_set_destination(m, destination); | |
1860 | if (r < 0) | |
1861 | return r; | |
1862 | } | |
1863 | ||
693eb9a2 | 1864 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1865 | } |
1866 | ||
de1c301e LP |
1867 | static usec_t calc_elapse(uint64_t usec) { |
1868 | if (usec == (uint64_t) -1) | |
1869 | return 0; | |
1870 | ||
de1c301e LP |
1871 | return now(CLOCK_MONOTONIC) + usec; |
1872 | } | |
1873 | ||
e3017af9 LP |
1874 | static int timeout_compare(const void *a, const void *b) { |
1875 | const struct reply_callback *x = a, *y = b; | |
1876 | ||
1877 | if (x->timeout != 0 && y->timeout == 0) | |
1878 | return -1; | |
1879 | ||
1880 | if (x->timeout == 0 && y->timeout != 0) | |
1881 | return 1; | |
1882 | ||
1883 | if (x->timeout < y->timeout) | |
1884 | return -1; | |
1885 | ||
1886 | if (x->timeout > y->timeout) | |
1887 | return 1; | |
1888 | ||
1889 | return 0; | |
1890 | } | |
1891 | ||
c49b30a2 | 1892 | _public_ int sd_bus_call_async( |
de1c301e | 1893 | sd_bus *bus, |
19befb2d | 1894 | sd_bus_slot **slot, |
e1c433c6 | 1895 | sd_bus_message *_m, |
52f3ba91 | 1896 | sd_bus_message_handler_t callback, |
de1c301e | 1897 | void *userdata, |
19befb2d | 1898 | uint64_t usec) { |
de1c301e | 1899 | |
4afd3348 LP |
1900 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
1901 | _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; | |
de1c301e LP |
1902 | int r; |
1903 | ||
d6888822 | 1904 | assert_return(m, -EINVAL); |
40ca29a1 | 1905 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1906 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1907 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1908 | |
1909 | if (!bus) | |
1910 | bus = m->bus; | |
1911 | ||
d6888822 | 1912 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1913 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1914 | |
a3d59cd1 LP |
1915 | if (!BUS_IS_OPEN(bus->state)) |
1916 | return -ENOTCONN; | |
1917 | ||
c9fe4af7 | 1918 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1919 | if (r < 0) |
1920 | return r; | |
de1c301e | 1921 | |
3df7a7e6 LP |
1922 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1923 | if (r < 0) | |
1924 | return r; | |
e3017af9 | 1925 | |
3df7a7e6 | 1926 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1927 | if (r < 0) |
1928 | return r; | |
1929 | ||
e1c433c6 LP |
1930 | r = bus_remarshal_message(bus, &m); |
1931 | if (r < 0) | |
1932 | return r; | |
1933 | ||
19befb2d LP |
1934 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1935 | if (!s) | |
de1c301e LP |
1936 | return -ENOMEM; |
1937 | ||
19befb2d | 1938 | s->reply_callback.callback = callback; |
de1c301e | 1939 | |
19befb2d | 1940 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1941 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1942 | if (r < 0) { |
19befb2d | 1943 | s->reply_callback.cookie = 0; |
de1c301e LP |
1944 | return r; |
1945 | } | |
1946 | ||
19befb2d LP |
1947 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1948 | if (s->reply_callback.timeout != 0) { | |
1949 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1950 | if (r < 0) { |
19befb2d | 1951 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1952 | return r; |
1953 | } | |
1954 | } | |
1955 | ||
19befb2d LP |
1956 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1957 | if (r < 0) | |
de1c301e | 1958 | return r; |
de1c301e | 1959 | |
19befb2d LP |
1960 | if (slot) |
1961 | *slot = s; | |
1962 | s = NULL; | |
e3017af9 | 1963 | |
19befb2d | 1964 | return r; |
de1c301e LP |
1965 | } |
1966 | ||
20902f3e | 1967 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1968 | int r; |
1969 | ||
1970 | assert(bus); | |
1971 | ||
718db961 | 1972 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1973 | return -ENOTCONN; |
d728d708 LP |
1974 | if (bus->state == BUS_RUNNING) |
1975 | return 1; | |
89ffcd2a LP |
1976 | |
1977 | for (;;) { | |
1978 | r = sd_bus_process(bus, NULL); | |
1979 | if (r < 0) | |
1980 | return r; | |
d728d708 LP |
1981 | if (bus->state == BUS_RUNNING) |
1982 | return 1; | |
e3017af9 LP |
1983 | if (r > 0) |
1984 | continue; | |
89ffcd2a LP |
1985 | |
1986 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1987 | if (r < 0) | |
1988 | return r; | |
1989 | } | |
1990 | } | |
1991 | ||
97f82db3 | 1992 | _public_ int sd_bus_call( |
de1c301e | 1993 | sd_bus *bus, |
97f82db3 | 1994 | sd_bus_message *_m, |
de1c301e LP |
1995 | uint64_t usec, |
1996 | sd_bus_error *error, | |
1997 | sd_bus_message **reply) { | |
1998 | ||
4afd3348 | 1999 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 2000 | usec_t timeout; |
693eb9a2 | 2001 | uint64_t cookie; |
7d22c717 LP |
2002 | unsigned i; |
2003 | int r; | |
de1c301e | 2004 | |
759e02e7 LP |
2005 | bus_assert_return(m, -EINVAL, error); |
2006 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
2007 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
2008 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
2009 | |
2010 | if (!bus) | |
2011 | bus = m->bus; | |
2012 | ||
759e02e7 LP |
2013 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
2014 | bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error); | |
97f82db3 | 2015 | |
759e02e7 LP |
2016 | if (!BUS_IS_OPEN(bus->state)) { |
2017 | r = -ENOTCONN; | |
2018 | goto fail; | |
2019 | } | |
a3d59cd1 | 2020 | |
97f82db3 KS |
2021 | r = bus_ensure_running(bus); |
2022 | if (r < 0) | |
759e02e7 | 2023 | goto fail; |
97f82db3 | 2024 | |
a43b9ca3 | 2025 | i = bus->rqueue_size; |
97f82db3 KS |
2026 | |
2027 | r = bus_seal_message(bus, m, usec); | |
2028 | if (r < 0) | |
759e02e7 | 2029 | goto fail; |
97f82db3 KS |
2030 | |
2031 | r = bus_remarshal_message(bus, &m); | |
2032 | if (r < 0) | |
759e02e7 | 2033 | goto fail; |
97f82db3 | 2034 | |
069f5e61 | 2035 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e | 2036 | if (r < 0) |
759e02e7 | 2037 | goto fail; |
de1c301e | 2038 | |
3df7a7e6 | 2039 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
2040 | |
2041 | for (;;) { | |
2042 | usec_t left; | |
de1c301e | 2043 | |
7d22c717 LP |
2044 | while (i < bus->rqueue_size) { |
2045 | sd_bus_message *incoming = NULL; | |
2046 | ||
2047 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2048 | |
693eb9a2 | 2049 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2050 | /* Found a match! */ |
2051 | ||
7d22c717 LP |
2052 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2053 | bus->rqueue_size--; | |
f9f97ca6 | 2054 | log_debug_bus_message(incoming); |
7d22c717 | 2055 | |
40ca29a1 | 2056 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2057 | |
2ce97e2b LP |
2058 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2059 | if (reply) | |
2060 | *reply = incoming; | |
2061 | else | |
2062 | sd_bus_message_unref(incoming); | |
2063 | ||
2064 | return 1; | |
2065 | } | |
2066 | ||
2067 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2068 | sd_bus_message_unref(incoming); |
2069 | return r; | |
b7f247e0 | 2070 | |
759e02e7 | 2071 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2072 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2073 | sd_bus_message_unref(incoming); |
2074 | return r; | |
2075 | } else { | |
a43b9ca3 | 2076 | r = -EIO; |
759e02e7 LP |
2077 | goto fail; |
2078 | } | |
a8a07f89 | 2079 | |
693eb9a2 | 2080 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2081 | bus->unique_name && |
2082 | incoming->sender && | |
2083 | streq(bus->unique_name, incoming->sender)) { | |
2084 | ||
7d22c717 LP |
2085 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2086 | bus->rqueue_size--; | |
2087 | ||
a8a07f89 LP |
2088 | /* Our own message? Somebody is trying |
2089 | * to send its own client a message, | |
2090 | * let's not dead-lock, let's fail | |
2091 | * immediately. */ | |
2092 | ||
2093 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2094 | r = -ELOOP; |
2095 | goto fail; | |
de1c301e LP |
2096 | } |
2097 | ||
de1c301e | 2098 | /* Try to read more, right-away */ |
7d22c717 | 2099 | i++; |
de1c301e | 2100 | } |
7d22c717 | 2101 | |
766c5809 | 2102 | r = bus_read_message(bus, false, 0); |
32f46480 | 2103 | if (r < 0) { |
103a5027 | 2104 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2105 | bus_enter_closing(bus); |
759e02e7 | 2106 | r = -ECONNRESET; |
441d56a1 | 2107 | } |
32f46480 | 2108 | |
759e02e7 | 2109 | goto fail; |
32f46480 | 2110 | } |
7d22c717 | 2111 | if (r > 0) |
e3017af9 | 2112 | continue; |
de1c301e LP |
2113 | |
2114 | if (timeout > 0) { | |
2115 | usec_t n; | |
2116 | ||
2117 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2118 | if (n >= timeout) { |
2119 | r = -ETIMEDOUT; | |
2120 | goto fail; | |
2121 | } | |
de1c301e LP |
2122 | |
2123 | left = timeout - n; | |
2124 | } else | |
2125 | left = (uint64_t) -1; | |
2126 | ||
e3017af9 | 2127 | r = bus_poll(bus, true, left); |
de1c301e | 2128 | if (r < 0) |
759e02e7 LP |
2129 | goto fail; |
2130 | if (r == 0) { | |
2131 | r = -ETIMEDOUT; | |
2132 | goto fail; | |
2133 | } | |
de1c301e LP |
2134 | |
2135 | r = dispatch_wqueue(bus); | |
32f46480 | 2136 | if (r < 0) { |
103a5027 | 2137 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2138 | bus_enter_closing(bus); |
759e02e7 | 2139 | r = -ECONNRESET; |
441d56a1 | 2140 | } |
32f46480 | 2141 | |
759e02e7 | 2142 | goto fail; |
32f46480 | 2143 | } |
de1c301e | 2144 | } |
759e02e7 LP |
2145 | |
2146 | fail: | |
2147 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2148 | } |
2149 | ||
d9f644e2 | 2150 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2151 | |
2152 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2153 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2154 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2155 | |
e82c9509 | 2156 | return bus->input_fd; |
de1c301e LP |
2157 | } |
2158 | ||
d9f644e2 | 2159 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2160 | int flags = 0; |
2161 | ||
d6888822 | 2162 | assert_return(bus, -EINVAL); |
d6888822 | 2163 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2164 | |
a3d59cd1 LP |
2165 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2166 | return -ENOTCONN; | |
2167 | ||
de1c301e LP |
2168 | if (bus->state == BUS_OPENING) |
2169 | flags |= POLLOUT; | |
89ffcd2a LP |
2170 | else if (bus->state == BUS_AUTHENTICATING) { |
2171 | ||
2181a7f5 | 2172 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2173 | flags |= POLLOUT; |
2174 | ||
2175 | flags |= POLLIN; | |
2176 | ||
2177 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2178 | if (bus->rqueue_size <= 0) |
2179 | flags |= POLLIN; | |
2180 | if (bus->wqueue_size > 0) | |
2181 | flags |= POLLOUT; | |
2182 | } | |
2183 | ||
2184 | return flags; | |
2185 | } | |
2186 | ||
d9f644e2 | 2187 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2188 | struct reply_callback *c; |
2189 | ||
d6888822 LP |
2190 | assert_return(bus, -EINVAL); |
2191 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2192 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2193 | |
a3d59cd1 LP |
2194 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2195 | return -ENOTCONN; | |
2196 | ||
8f8f05a9 LP |
2197 | if (bus->track_queue) { |
2198 | *timeout_usec = 0; | |
2199 | return 1; | |
2200 | } | |
2201 | ||
718db961 LP |
2202 | if (bus->state == BUS_CLOSING) { |
2203 | *timeout_usec = 0; | |
2204 | return 1; | |
2205 | } | |
2206 | ||
e3017af9 LP |
2207 | if (bus->state == BUS_AUTHENTICATING) { |
2208 | *timeout_usec = bus->auth_timeout; | |
2209 | return 1; | |
2210 | } | |
2211 | ||
adee69fa LP |
2212 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2213 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2214 | return 0; |
adee69fa | 2215 | } |
e3017af9 | 2216 | |
8efd6381 LP |
2217 | if (bus->rqueue_size > 0) { |
2218 | *timeout_usec = 0; | |
2219 | return 1; | |
2220 | } | |
2221 | ||
e3017af9 | 2222 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2223 | if (!c) { |
2224 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2225 | return 0; |
adee69fa | 2226 | } |
e3017af9 | 2227 | |
19befb2d LP |
2228 | if (c->timeout == 0) { |
2229 | *timeout_usec = (uint64_t) -1; | |
2230 | return 0; | |
2231 | } | |
2232 | ||
e3017af9 LP |
2233 | *timeout_usec = c->timeout; |
2234 | return 1; | |
2235 | } | |
2236 | ||
2237 | static int process_timeout(sd_bus *bus) { | |
4afd3348 LP |
2238 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2239 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; | |
e3017af9 | 2240 | struct reply_callback *c; |
1b64f838 | 2241 | sd_bus_slot *slot; |
e3017af9 LP |
2242 | usec_t n; |
2243 | int r; | |
2244 | ||
2245 | assert(bus); | |
2246 | ||
2247 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2248 | if (!c) | |
2249 | return 0; | |
2250 | ||
2251 | n = now(CLOCK_MONOTONIC); | |
2252 | if (c->timeout > n) | |
2253 | return 0; | |
2254 | ||
eb01ba5d LP |
2255 | r = bus_message_new_synthetic_error( |
2256 | bus, | |
693eb9a2 | 2257 | c->cookie, |
14c24659 | 2258 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2259 | &m); |
2260 | if (r < 0) | |
2261 | return r; | |
2262 | ||
7adc46fc | 2263 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2264 | if (r < 0) |
2265 | return r; | |
2266 | ||
e3017af9 | 2267 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2268 | c->timeout = 0; |
2269 | ||
c9fe4af7 | 2270 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2271 | c->cookie = 0; |
2272 | ||
1b64f838 | 2273 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2274 | |
313cefa1 | 2275 | bus->iteration_counter++; |
718db961 | 2276 | |
1b64f838 LP |
2277 | bus->current_message = m; |
2278 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2279 | bus->current_handler = c->callback; |
2280 | bus->current_userdata = slot->userdata; | |
19070062 | 2281 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2282 | bus->current_userdata = NULL; |
2283 | bus->current_handler = NULL; | |
d974ad05 | 2284 | bus->current_slot = NULL; |
19befb2d | 2285 | bus->current_message = NULL; |
718db961 | 2286 | |
1b64f838 LP |
2287 | if (slot->floating) { |
2288 | bus_slot_disconnect(slot); | |
2289 | sd_bus_slot_unref(slot); | |
2290 | } | |
2291 | ||
d974ad05 DH |
2292 | sd_bus_slot_unref(slot); |
2293 | ||
1b64f838 | 2294 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2295 | } |
2296 | ||
9d373862 LP |
2297 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2298 | assert(bus); | |
2299 | assert(m); | |
2300 | ||
2301 | if (bus->state != BUS_HELLO) | |
2302 | return 0; | |
2303 | ||
2304 | /* Let's make sure the first message on the bus is the HELLO | |
2305 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2306 | * here (we leave that to the usual handling), we just verify |
2307 | * we don't let any earlier msg through. */ | |
9d373862 | 2308 | |
40ca29a1 LP |
2309 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2310 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2311 | return -EIO; |
2312 | ||
19befb2d | 2313 | if (m->reply_cookie != 1) |
9d373862 LP |
2314 | return -EIO; |
2315 | ||
2316 | return 0; | |
2317 | } | |
2318 | ||
a652755d | 2319 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
4afd3348 LP |
2320 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; |
2321 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
19befb2d | 2322 | struct reply_callback *c; |
1b64f838 | 2323 | sd_bus_slot *slot; |
a652755d LP |
2324 | int r; |
2325 | ||
2326 | assert(bus); | |
2327 | assert(m); | |
2328 | ||
40ca29a1 LP |
2329 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2330 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2331 | return 0; |
2332 | ||
09365592 LP |
2333 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2334 | return 0; | |
2335 | ||
2336 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2337 | return 0; | |
2338 | ||
c9fe4af7 | 2339 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2340 | if (!c) |
2341 | return 0; | |
2342 | ||
19befb2d | 2343 | c->cookie = 0; |
19befb2d | 2344 | |
1b64f838 | 2345 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2346 | |
2ce97e2b LP |
2347 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2348 | ||
2349 | /* If the reply contained a file descriptor which we | |
2350 | * didn't want we pass an error instead. */ | |
2351 | ||
2352 | r = bus_message_new_synthetic_error( | |
2353 | bus, | |
2354 | m->reply_cookie, | |
2355 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2356 | &synthetic_reply); | |
2357 | if (r < 0) | |
1b64f838 | 2358 | return r; |
2ce97e2b | 2359 | |
52cd5877 LP |
2360 | /* Copy over original timestamp */ |
2361 | synthetic_reply->realtime = m->realtime; | |
2362 | synthetic_reply->monotonic = m->monotonic; | |
2363 | synthetic_reply->seqnum = m->seqnum; | |
2364 | ||
2ce97e2b LP |
2365 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2366 | if (r < 0) | |
1b64f838 | 2367 | return r; |
2ce97e2b LP |
2368 | |
2369 | m = synthetic_reply; | |
2370 | } else { | |
2371 | r = sd_bus_message_rewind(m, true); | |
2372 | if (r < 0) | |
1b64f838 | 2373 | return r; |
2ce97e2b | 2374 | } |
88fe224c | 2375 | |
1b64f838 LP |
2376 | if (c->timeout != 0) { |
2377 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2378 | c->timeout = 0; | |
2379 | } | |
19befb2d | 2380 | |
1b64f838 | 2381 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2382 | bus->current_handler = c->callback; |
2383 | bus->current_userdata = slot->userdata; | |
19070062 | 2384 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2385 | bus->current_userdata = NULL; |
2386 | bus->current_handler = NULL; | |
d974ad05 | 2387 | bus->current_slot = NULL; |
a652755d | 2388 | |
19befb2d LP |
2389 | if (slot->floating) { |
2390 | bus_slot_disconnect(slot); | |
2391 | sd_bus_slot_unref(slot); | |
2392 | } | |
2393 | ||
d974ad05 DH |
2394 | sd_bus_slot_unref(slot); |
2395 | ||
1b64f838 | 2396 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2397 | } |
2398 | ||
2399 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
4afd3348 | 2400 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2401 | struct filter_callback *l; |
2402 | int r; | |
2403 | ||
392d5b37 LP |
2404 | assert(bus); |
2405 | assert(m); | |
2406 | ||
7286037f LP |
2407 | do { |
2408 | bus->filter_callbacks_modified = false; | |
2409 | ||
2410 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2411 | sd_bus_slot *slot; |
7286037f LP |
2412 | |
2413 | if (bus->filter_callbacks_modified) | |
2414 | break; | |
2415 | ||
2416 | /* Don't run this more than once per iteration */ | |
2417 | if (l->last_iteration == bus->iteration_counter) | |
2418 | continue; | |
2419 | ||
2420 | l->last_iteration = bus->iteration_counter; | |
2421 | ||
88fe224c LP |
2422 | r = sd_bus_message_rewind(m, true); |
2423 | if (r < 0) | |
2424 | return r; | |
2425 | ||
1b64f838 LP |
2426 | slot = container_of(l, sd_bus_slot, filter_callback); |
2427 | ||
2428 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2429 | bus->current_handler = l->callback; |
2430 | bus->current_userdata = slot->userdata; | |
19070062 | 2431 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2432 | bus->current_userdata = NULL; |
2433 | bus->current_handler = NULL; | |
1b64f838 | 2434 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2435 | |
ebcf1f97 | 2436 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2437 | if (r != 0) |
2438 | return r; | |
2439 | ||
2440 | } | |
2441 | ||
2442 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2443 | |
2444 | return 0; | |
2445 | } | |
2446 | ||
392d5b37 | 2447 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2448 | int r; |
2449 | ||
392d5b37 LP |
2450 | assert(bus); |
2451 | assert(m); | |
2452 | ||
7286037f LP |
2453 | do { |
2454 | bus->match_callbacks_modified = false; | |
2455 | ||
eb01ba5d | 2456 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2457 | if (r != 0) |
2458 | return r; | |
2459 | ||
2460 | } while (bus->match_callbacks_modified); | |
2461 | ||
2462 | return 0; | |
392d5b37 LP |
2463 | } |
2464 | ||
b9bf7e2b | 2465 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
4afd3348 | 2466 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
b9bf7e2b LP |
2467 | int r; |
2468 | ||
2469 | assert(bus); | |
2470 | assert(m); | |
2471 | ||
09365592 LP |
2472 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2473 | return 0; | |
2474 | ||
758bf0c7 LP |
2475 | if (bus->manual_peer_interface) |
2476 | return 0; | |
2477 | ||
40ca29a1 | 2478 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2479 | return 0; |
2480 | ||
2481 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2482 | return 0; | |
2483 | ||
0461f8cd | 2484 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2485 | return 1; |
2486 | ||
2487 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2488 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2489 | else if (streq_ptr(m->member, "GetMachineId")) { |
2490 | sd_id128_t id; | |
2491 | char sid[33]; | |
2492 | ||
2493 | r = sd_id128_get_machine(&id); | |
2494 | if (r < 0) | |
2495 | return r; | |
2496 | ||
df2d202e | 2497 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2498 | if (r < 0) |
2499 | return r; | |
2500 | ||
2501 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2502 | } else { | |
29ddb38f | 2503 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2504 | m, &reply, |
40ca29a1 | 2505 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2506 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2507 | } |
2508 | ||
2509 | if (r < 0) | |
2510 | return r; | |
2511 | ||
2512 | r = sd_bus_send(bus, reply, NULL); | |
2513 | if (r < 0) | |
2514 | return r; | |
2515 | ||
2516 | return 1; | |
2517 | } | |
2518 | ||
2ce97e2b LP |
2519 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2520 | assert(bus); | |
2521 | assert(m); | |
2522 | ||
2523 | /* If we got a message with a file descriptor which we didn't | |
2524 | * want to accept, then let's drop it. How can this even | |
2525 | * happen? For example, when the kernel queues a message into | |
2526 | * an activatable names's queue which allows fds, and then is | |
2527 | * delivered to us later even though we ourselves did not | |
2528 | * negotiate it. */ | |
2529 | ||
09365592 LP |
2530 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2531 | return 0; | |
2532 | ||
2ce97e2b LP |
2533 | if (m->n_fds <= 0) |
2534 | return 0; | |
2535 | ||
2536 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2537 | return 0; | |
2538 | ||
2539 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2540 | return 1; /* just eat it up */ | |
2541 | ||
2542 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2543 | } | |
2544 | ||
992c052c | 2545 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2546 | int r; |
2547 | ||
2548 | assert(bus); | |
992c052c | 2549 | assert(m); |
e3017af9 | 2550 | |
19befb2d | 2551 | bus->current_message = m; |
992c052c | 2552 | bus->iteration_counter++; |
e3017af9 | 2553 | |
f9f97ca6 | 2554 | log_debug_bus_message(m); |
40ca29a1 | 2555 | |
992c052c LP |
2556 | r = process_hello(bus, m); |
2557 | if (r != 0) | |
affff0b6 | 2558 | goto finish; |
a652755d | 2559 | |
992c052c LP |
2560 | r = process_reply(bus, m); |
2561 | if (r != 0) | |
affff0b6 | 2562 | goto finish; |
e3017af9 | 2563 | |
2ce97e2b LP |
2564 | r = process_fd_check(bus, m); |
2565 | if (r != 0) | |
2566 | goto finish; | |
2567 | ||
992c052c LP |
2568 | r = process_filter(bus, m); |
2569 | if (r != 0) | |
affff0b6 | 2570 | goto finish; |
a652755d | 2571 | |
992c052c LP |
2572 | r = process_match(bus, m); |
2573 | if (r != 0) | |
affff0b6 | 2574 | goto finish; |
a652755d | 2575 | |
992c052c LP |
2576 | r = process_builtin(bus, m); |
2577 | if (r != 0) | |
affff0b6 LP |
2578 | goto finish; |
2579 | ||
2580 | r = bus_process_object(bus, m); | |
a652755d | 2581 | |
affff0b6 | 2582 | finish: |
19befb2d | 2583 | bus->current_message = NULL; |
affff0b6 | 2584 | return r; |
29ddb38f | 2585 | } |
88fe224c | 2586 | |
8f8f05a9 LP |
2587 | static int dispatch_track(sd_bus *bus) { |
2588 | assert(bus); | |
2589 | ||
2590 | if (!bus->track_queue) | |
2591 | return 0; | |
2592 | ||
2593 | bus_track_dispatch(bus->track_queue); | |
2594 | return 1; | |
2595 | } | |
2596 | ||
766c5809 | 2597 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
4afd3348 | 2598 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
29ddb38f | 2599 | int r; |
a652755d | 2600 | |
29ddb38f | 2601 | assert(bus); |
992c052c | 2602 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2603 | |
992c052c LP |
2604 | r = process_timeout(bus); |
2605 | if (r != 0) | |
2606 | goto null_message; | |
7286037f | 2607 | |
992c052c LP |
2608 | r = dispatch_wqueue(bus); |
2609 | if (r != 0) | |
2610 | goto null_message; | |
7286037f | 2611 | |
8f8f05a9 LP |
2612 | r = dispatch_track(bus); |
2613 | if (r != 0) | |
2614 | goto null_message; | |
2615 | ||
766c5809 | 2616 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2617 | if (r < 0) |
2618 | return r; | |
2619 | if (!m) | |
2620 | goto null_message; | |
7286037f | 2621 | |
992c052c LP |
2622 | r = process_message(bus, m); |
2623 | if (r != 0) | |
2624 | goto null_message; | |
7286037f | 2625 | |
992c052c LP |
2626 | if (ret) { |
2627 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2628 | if (r < 0) |
2629 | return r; | |
e3017af9 | 2630 | |
992c052c LP |
2631 | *ret = m; |
2632 | m = NULL; | |
2633 | return 1; | |
2634 | } | |
a652755d | 2635 | |
40ca29a1 | 2636 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2637 | |
dc74ce9b LP |
2638 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2639 | strna(sd_bus_message_get_sender(m)), | |
2640 | strna(sd_bus_message_get_path(m)), | |
2641 | strna(sd_bus_message_get_interface(m)), | |
2642 | strna(sd_bus_message_get_member(m))); | |
2643 | ||
992c052c | 2644 | r = sd_bus_reply_method_errorf( |
df2d202e | 2645 | m, |
40ca29a1 | 2646 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2647 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2648 | if (r < 0) |
2649 | return r; | |
2650 | } | |
e3017af9 | 2651 | |
992c052c | 2652 | return 1; |
0a72c2bd | 2653 | |
992c052c LP |
2654 | null_message: |
2655 | if (r >= 0 && ret) | |
2656 | *ret = NULL; | |
0a72c2bd | 2657 | |
992c052c | 2658 | return r; |
29ddb38f | 2659 | } |
0a72c2bd | 2660 | |
fbb4603d LP |
2661 | static int bus_exit_now(sd_bus *bus) { |
2662 | assert(bus); | |
2663 | ||
2664 | /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes | |
2665 | * sd_event_exit(), otherwise invokes libc exit(). */ | |
2666 | ||
2667 | if (bus->exited) /* did we already exit? */ | |
2668 | return 0; | |
2669 | if (!bus->exit_triggered) /* was the exit condition triggered? */ | |
2670 | return 0; | |
2671 | if (!bus->exit_on_disconnect) /* Shall we actually exit on disconnection? */ | |
2672 | return 0; | |
2673 | ||
2674 | bus->exited = true; /* never exit more than once */ | |
2675 | ||
2676 | log_debug("Bus connection disconnected, exiting."); | |
2677 | ||
2678 | if (bus->event) | |
2679 | return sd_event_exit(bus->event, EXIT_FAILURE); | |
2680 | else | |
2681 | exit(EXIT_FAILURE); | |
2682 | ||
2683 | assert_not_reached("exit() didn't exit?"); | |
2684 | } | |
2685 | ||
217fcc7e LP |
2686 | static int process_closing_reply_callback(sd_bus *bus, struct reply_callback *c) { |
2687 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
4afd3348 | 2688 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
217fcc7e | 2689 | sd_bus_slot *slot; |
718db961 LP |
2690 | int r; |
2691 | ||
2692 | assert(bus); | |
217fcc7e | 2693 | assert(c); |
718db961 | 2694 | |
217fcc7e LP |
2695 | r = bus_message_new_synthetic_error( |
2696 | bus, | |
2697 | c->cookie, | |
2698 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), | |
2699 | &m); | |
2700 | if (r < 0) | |
2701 | return r; | |
ebcf1f97 | 2702 | |
217fcc7e LP |
2703 | r = bus_seal_synthetic_message(bus, m); |
2704 | if (r < 0) | |
2705 | return r; | |
718db961 | 2706 | |
217fcc7e LP |
2707 | if (c->timeout != 0) { |
2708 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2709 | c->timeout = 0; | |
2710 | } | |
718db961 | 2711 | |
217fcc7e LP |
2712 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
2713 | c->cookie = 0; | |
2714 | ||
2715 | slot = container_of(c, sd_bus_slot, reply_callback); | |
718db961 | 2716 | |
217fcc7e | 2717 | bus->iteration_counter++; |
19befb2d | 2718 | |
217fcc7e LP |
2719 | bus->current_message = m; |
2720 | bus->current_slot = sd_bus_slot_ref(slot); | |
2721 | bus->current_handler = c->callback; | |
2722 | bus->current_userdata = slot->userdata; | |
2723 | r = c->callback(m, slot->userdata, &error_buffer); | |
2724 | bus->current_userdata = NULL; | |
2725 | bus->current_handler = NULL; | |
2726 | bus->current_slot = NULL; | |
2727 | bus->current_message = NULL; | |
718db961 | 2728 | |
217fcc7e LP |
2729 | if (slot->floating) { |
2730 | bus_slot_disconnect(slot); | |
2731 | sd_bus_slot_unref(slot); | |
2732 | } | |
718db961 | 2733 | |
217fcc7e | 2734 | sd_bus_slot_unref(slot); |
1b64f838 | 2735 | |
217fcc7e LP |
2736 | return bus_maybe_reply_error(m, r, &error_buffer); |
2737 | } | |
718db961 | 2738 | |
217fcc7e LP |
2739 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2740 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
2741 | struct reply_callback *c; | |
2742 | int r; | |
d974ad05 | 2743 | |
217fcc7e LP |
2744 | assert(bus); |
2745 | assert(bus->state == BUS_CLOSING); | |
2746 | ||
2747 | /* First, fail all outstanding method calls */ | |
2748 | c = ordered_hashmap_first(bus->reply_callbacks); | |
2749 | if (c) | |
2750 | return process_closing_reply_callback(bus, c); | |
718db961 | 2751 | |
232f3677 LP |
2752 | /* Then, fake-drop all remaining bus tracking references */ |
2753 | if (bus->tracks) { | |
2754 | bus_track_close(bus->tracks); | |
2755 | return 1; | |
2756 | } | |
2757 | ||
718db961 LP |
2758 | /* Then, synthesize a Disconnected message */ |
2759 | r = sd_bus_message_new_signal( | |
2760 | bus, | |
151b9b96 | 2761 | &m, |
718db961 LP |
2762 | "/org/freedesktop/DBus/Local", |
2763 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2764 | "Disconnected"); |
718db961 LP |
2765 | if (r < 0) |
2766 | return r; | |
2767 | ||
fb6d9b77 | 2768 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2769 | |
7adc46fc | 2770 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2771 | if (r < 0) |
2772 | return r; | |
2773 | ||
2774 | sd_bus_close(bus); | |
2775 | ||
19befb2d | 2776 | bus->current_message = m; |
718db961 LP |
2777 | bus->iteration_counter++; |
2778 | ||
2779 | r = process_filter(bus, m); | |
2780 | if (r != 0) | |
2781 | goto finish; | |
2782 | ||
2783 | r = process_match(bus, m); | |
2784 | if (r != 0) | |
2785 | goto finish; | |
2786 | ||
fbb4603d LP |
2787 | /* Nothing else to do, exit now, if the condition holds */ |
2788 | bus->exit_triggered = true; | |
2789 | (void) bus_exit_now(bus); | |
2790 | ||
718db961 LP |
2791 | if (ret) { |
2792 | *ret = m; | |
2793 | m = NULL; | |
2794 | } | |
2795 | ||
2796 | r = 1; | |
2797 | ||
2798 | finish: | |
19befb2d LP |
2799 | bus->current_message = NULL; |
2800 | ||
718db961 LP |
2801 | return r; |
2802 | } | |
2803 | ||
766c5809 | 2804 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2805 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2806 | int r; |
0a72c2bd | 2807 | |
992c052c LP |
2808 | /* Returns 0 when we didn't do anything. This should cause the |
2809 | * caller to invoke sd_bus_wait() before returning the next | |
2810 | * time. Returns > 0 when we did something, which possibly | |
2811 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2812 | |
d6888822 LP |
2813 | assert_return(bus, -EINVAL); |
2814 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2815 | |
992c052c | 2816 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2817 | assert_return(!bus->current_message, -EBUSY); |
2818 | assert(!bus->current_slot); | |
0a72c2bd | 2819 | |
992c052c | 2820 | switch (bus->state) { |
0a72c2bd | 2821 | |
992c052c | 2822 | case BUS_UNSET: |
992c052c | 2823 | return -ENOTCONN; |
0a72c2bd | 2824 | |
6d6f4904 LP |
2825 | case BUS_CLOSED: |
2826 | return -ECONNRESET; | |
2827 | ||
992c052c LP |
2828 | case BUS_OPENING: |
2829 | r = bus_socket_process_opening(bus); | |
103a5027 | 2830 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
718db961 LP |
2831 | bus_enter_closing(bus); |
2832 | r = 1; | |
2833 | } else if (r < 0) | |
29ddb38f | 2834 | return r; |
992c052c LP |
2835 | if (ret) |
2836 | *ret = NULL; | |
a652755d LP |
2837 | return r; |
2838 | ||
992c052c | 2839 | case BUS_AUTHENTICATING: |
992c052c | 2840 | r = bus_socket_process_authenticating(bus); |
103a5027 | 2841 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
718db961 LP |
2842 | bus_enter_closing(bus); |
2843 | r = 1; | |
2844 | } else if (r < 0) | |
29ddb38f | 2845 | return r; |
718db961 | 2846 | |
992c052c LP |
2847 | if (ret) |
2848 | *ret = NULL; | |
718db961 | 2849 | |
992c052c | 2850 | return r; |
a652755d | 2851 | |
992c052c LP |
2852 | case BUS_RUNNING: |
2853 | case BUS_HELLO: | |
766c5809 | 2854 | r = process_running(bus, hint_priority, priority, ret); |
103a5027 | 2855 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
718db961 LP |
2856 | bus_enter_closing(bus); |
2857 | r = 1; | |
2858 | ||
2859 | if (ret) | |
2860 | *ret = NULL; | |
2861 | } | |
43a43f50 | 2862 | |
43a43f50 | 2863 | return r; |
718db961 LP |
2864 | |
2865 | case BUS_CLOSING: | |
2866 | return process_closing(bus, ret); | |
992c052c | 2867 | } |
43a43f50 | 2868 | |
992c052c | 2869 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2870 | } |
2871 | ||
766c5809 LP |
2872 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2873 | return bus_process_internal(bus, false, 0, ret); | |
2874 | } | |
2875 | ||
2876 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2877 | return bus_process_internal(bus, true, priority, ret); | |
2878 | } | |
2879 | ||
992c052c LP |
2880 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2881 | struct pollfd p[2] = {}; | |
2882 | int r, e, n; | |
2883 | struct timespec ts; | |
3a43da28 | 2884 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2885 | |
2886 | assert(bus); | |
718db961 LP |
2887 | |
2888 | if (bus->state == BUS_CLOSING) | |
2889 | return 1; | |
2890 | ||
a3d59cd1 LP |
2891 | if (!BUS_IS_OPEN(bus->state)) |
2892 | return -ENOTCONN; | |
adcdb374 | 2893 | |
992c052c LP |
2894 | e = sd_bus_get_events(bus); |
2895 | if (e < 0) | |
2896 | return e; | |
adcdb374 | 2897 | |
992c052c | 2898 | if (need_more) |
8efd6381 LP |
2899 | /* The caller really needs some more data, he doesn't |
2900 | * care about what's already read, or any timeouts | |
ad67ef27 | 2901 | * except its own. */ |
992c052c | 2902 | e |= POLLIN; |
992c052c | 2903 | else { |
8efd6381 LP |
2904 | usec_t until; |
2905 | /* The caller wants to process if there's something to | |
2906 | * process, but doesn't care otherwise */ | |
2907 | ||
2908 | r = sd_bus_get_timeout(bus, &until); | |
2909 | if (r < 0) | |
2910 | return r; | |
2911 | if (r > 0) { | |
2912 | usec_t nw; | |
2913 | nw = now(CLOCK_MONOTONIC); | |
2914 | m = until > nw ? until - nw : 0; | |
2915 | } | |
992c052c | 2916 | } |
adcdb374 | 2917 | |
992c052c LP |
2918 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2919 | m = timeout_usec; | |
adcdb374 | 2920 | |
992c052c LP |
2921 | p[0].fd = bus->input_fd; |
2922 | if (bus->output_fd == bus->input_fd) { | |
2923 | p[0].events = e; | |
2924 | n = 1; | |
2925 | } else { | |
2926 | p[0].events = e & POLLIN; | |
2927 | p[1].fd = bus->output_fd; | |
2928 | p[1].events = e & POLLOUT; | |
2929 | n = 2; | |
adcdb374 LP |
2930 | } |
2931 | ||
992c052c | 2932 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2933 | if (r < 0) |
992c052c | 2934 | return -errno; |
adcdb374 | 2935 | |
992c052c | 2936 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2937 | } |
2938 | ||
d9f644e2 | 2939 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2940 | |
d6888822 | 2941 | assert_return(bus, -EINVAL); |
d6888822 | 2942 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2943 | |
718db961 LP |
2944 | if (bus->state == BUS_CLOSING) |
2945 | return 0; | |
2946 | ||
a3d59cd1 LP |
2947 | if (!BUS_IS_OPEN(bus->state)) |
2948 | return -ENOTCONN; | |
718db961 | 2949 | |
992c052c LP |
2950 | if (bus->rqueue_size > 0) |
2951 | return 0; | |
9db76355 | 2952 | |
992c052c LP |
2953 | return bus_poll(bus, false, timeout_usec); |
2954 | } | |
9db76355 | 2955 | |
d9f644e2 | 2956 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2957 | int r; |
9db76355 | 2958 | |
d6888822 | 2959 | assert_return(bus, -EINVAL); |
d6888822 | 2960 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2961 | |
718db961 LP |
2962 | if (bus->state == BUS_CLOSING) |
2963 | return 0; | |
2964 | ||
a3d59cd1 LP |
2965 | if (!BUS_IS_OPEN(bus->state)) |
2966 | return -ENOTCONN; | |
718db961 | 2967 | |
992c052c LP |
2968 | r = bus_ensure_running(bus); |
2969 | if (r < 0) | |
2970 | return r; | |
9db76355 | 2971 | |
992c052c LP |
2972 | if (bus->wqueue_size <= 0) |
2973 | return 0; | |
9db76355 | 2974 | |
992c052c LP |
2975 | for (;;) { |
2976 | r = dispatch_wqueue(bus); | |
32f46480 | 2977 | if (r < 0) { |
103a5027 | 2978 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2979 | bus_enter_closing(bus); |
441d56a1 LP |
2980 | return -ECONNRESET; |
2981 | } | |
32f46480 | 2982 | |
9db76355 | 2983 | return r; |
32f46480 | 2984 | } |
9db76355 | 2985 | |
992c052c LP |
2986 | if (bus->wqueue_size <= 0) |
2987 | return 0; | |
9db76355 | 2988 | |
992c052c | 2989 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2990 | if (r < 0) |
2991 | return r; | |
9db76355 | 2992 | } |
9db76355 LP |
2993 | } |
2994 | ||
19befb2d LP |
2995 | _public_ int sd_bus_add_filter( |
2996 | sd_bus *bus, | |
2997 | sd_bus_slot **slot, | |
2998 | sd_bus_message_handler_t callback, | |
2999 | void *userdata) { | |
d9f644e2 | 3000 | |
19befb2d | 3001 | sd_bus_slot *s; |
de1c301e | 3002 | |
d6888822 LP |
3003 | assert_return(bus, -EINVAL); |
3004 | assert_return(callback, -EINVAL); | |
3005 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 3006 | |
19befb2d LP |
3007 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
3008 | if (!s) | |
29ddb38f LP |
3009 | return -ENOMEM; |
3010 | ||
19befb2d | 3011 | s->filter_callback.callback = callback; |
a652755d | 3012 | |
19befb2d LP |
3013 | bus->filter_callbacks_modified = true; |
3014 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 3015 | |
19befb2d LP |
3016 | if (slot) |
3017 | *slot = s; | |
29ddb38f | 3018 | |
992c052c | 3019 | return 0; |
a652755d | 3020 | } |
392d5b37 | 3021 | |
19befb2d LP |
3022 | _public_ int sd_bus_add_match( |
3023 | sd_bus *bus, | |
3024 | sd_bus_slot **slot, | |
3025 | const char *match, | |
3026 | sd_bus_message_handler_t callback, | |
3027 | void *userdata) { | |
d9f644e2 | 3028 | |
992c052c LP |
3029 | struct bus_match_component *components = NULL; |
3030 | unsigned n_components = 0; | |
2915234d | 3031 | sd_bus_slot *s = NULL; |
992c052c | 3032 | int r = 0; |
392d5b37 | 3033 | |
d6888822 LP |
3034 | assert_return(bus, -EINVAL); |
3035 | assert_return(match, -EINVAL); | |
3036 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 3037 | |
992c052c LP |
3038 | r = bus_match_parse(match, &components, &n_components); |
3039 | if (r < 0) | |
3040 | goto finish; | |
29ddb38f | 3041 | |
19befb2d LP |
3042 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
3043 | if (!s) { | |
3044 | r = -ENOMEM; | |
3045 | goto finish; | |
3046 | } | |
3047 | ||
3048 | s->match_callback.callback = callback; | |
3049 | s->match_callback.cookie = ++bus->match_cookie; | |
3050 | ||
992c052c | 3051 | if (bus->bus_client) { |
cc65fe5e | 3052 | enum bus_match_scope scope; |
29ddb38f | 3053 | |
cc65fe5e | 3054 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 3055 | |
cc65fe5e LP |
3056 | /* Do not install server-side matches for matches |
3057 | * against the local service, interface or bus | |
9ee7a50c DH |
3058 | * path. */ |
3059 | if (scope != BUS_MATCH_LOCAL) { | |
cc65fe5e LP |
3060 | |
3061 | if (!bus->is_kernel) { | |
3062 | /* When this is not a kernel transport, we | |
3063 | * store the original match string, so that we | |
3064 | * can use it to remove the match again */ | |
3065 | ||
3066 | s->match_callback.match_string = strdup(match); | |
3067 | if (!s->match_callback.match_string) { | |
3068 | r = -ENOMEM; | |
3069 | goto finish; | |
3070 | } | |
19befb2d | 3071 | } |
19befb2d | 3072 | |
cc65fe5e LP |
3073 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); |
3074 | if (r < 0) | |
3075 | goto finish; | |
3076 | ||
3077 | s->match_added = true; | |
3078 | } | |
392d5b37 LP |
3079 | } |
3080 | ||
992c052c | 3081 | bus->match_callbacks_modified = true; |
19befb2d LP |
3082 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3083 | if (r < 0) | |
3084 | goto finish; | |
3085 | ||
3086 | if (slot) | |
3087 | *slot = s; | |
3088 | s = NULL; | |
917b5dc7 | 3089 | |
992c052c LP |
3090 | finish: |
3091 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3092 | sd_bus_slot_unref(s); |
3093 | ||
992c052c | 3094 | return r; |
917b5dc7 LP |
3095 | } |
3096 | ||
19befb2d LP |
3097 | int bus_remove_match_by_string( |
3098 | sd_bus *bus, | |
3099 | const char *match, | |
3100 | sd_bus_message_handler_t callback, | |
3101 | void *userdata) { | |
d9f644e2 | 3102 | |
992c052c LP |
3103 | struct bus_match_component *components = NULL; |
3104 | unsigned n_components = 0; | |
19befb2d LP |
3105 | struct match_callback *c; |
3106 | int r = 0; | |
917b5dc7 | 3107 | |
d6888822 LP |
3108 | assert_return(bus, -EINVAL); |
3109 | assert_return(match, -EINVAL); | |
3110 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3111 | |
992c052c | 3112 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3113 | if (r < 0) |
19befb2d | 3114 | goto finish; |
f10dda3b | 3115 | |
19befb2d LP |
3116 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3117 | if (r <= 0) | |
3118 | goto finish; | |
f10dda3b | 3119 | |
19befb2d | 3120 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3121 | |
19befb2d | 3122 | finish: |
992c052c | 3123 | bus_match_parse_free(components, n_components); |
f10dda3b | 3124 | |
19befb2d | 3125 | return r; |
f10dda3b LP |
3126 | } |
3127 | ||
992c052c LP |
3128 | bool bus_pid_changed(sd_bus *bus) { |
3129 | assert(bus); | |
f10dda3b | 3130 | |
992c052c LP |
3131 | /* We don't support people creating a bus connection and |
3132 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3133 | |
df0ff127 | 3134 | return bus->original_pid != getpid_cached(); |
d5a2b9a6 | 3135 | } |
40ca29a1 LP |
3136 | |
3137 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3138 | sd_bus *bus = userdata; |
40ca29a1 LP |
3139 | int r; |
3140 | ||
3141 | assert(bus); | |
3142 | ||
3143 | r = sd_bus_process(bus, NULL); | |
3144 | if (r < 0) | |
3145 | return r; | |
3146 | ||
3147 | return 1; | |
3148 | } | |
3149 | ||
3150 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3151 | sd_bus *bus = userdata; |
40ca29a1 LP |
3152 | int r; |
3153 | ||
3154 | assert(bus); | |
3155 | ||
3156 | r = sd_bus_process(bus, NULL); | |
3157 | if (r < 0) | |
3158 | return r; | |
3159 | ||
3160 | return 1; | |
3161 | } | |
3162 | ||
3163 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3164 | sd_bus *bus = userdata; | |
3165 | int r, e; | |
3166 | usec_t until; | |
3167 | ||
3168 | assert(s); | |
3169 | assert(bus); | |
3170 | ||
3171 | e = sd_bus_get_events(bus); | |
3172 | if (e < 0) | |
3173 | return e; | |
3174 | ||
3175 | if (bus->output_fd != bus->input_fd) { | |
3176 | ||
3177 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3178 | if (r < 0) | |
3179 | return r; | |
3180 | ||
3181 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3182 | if (r < 0) | |
3183 | return r; | |
3184 | } else { | |
3185 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3186 | if (r < 0) | |
3187 | return r; | |
3188 | } | |
3189 | ||
3190 | r = sd_bus_get_timeout(bus, &until); | |
3191 | if (r < 0) | |
3192 | return r; | |
3193 | if (r > 0) { | |
3194 | int j; | |
3195 | ||
3196 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3197 | if (j < 0) | |
3198 | return j; | |
3199 | } | |
3200 | ||
3201 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3202 | if (r < 0) | |
3203 | return r; | |
3204 | ||
3205 | return 1; | |
3206 | } | |
3207 | ||
abc5fe72 LP |
3208 | static int quit_callback(sd_event_source *event, void *userdata) { |
3209 | sd_bus *bus = userdata; | |
3210 | ||
3211 | assert(event); | |
3212 | ||
3213 | sd_bus_flush(bus); | |
7bb4d371 | 3214 | sd_bus_close(bus); |
abc5fe72 LP |
3215 | |
3216 | return 1; | |
3217 | } | |
3218 | ||
1e05d493 LP |
3219 | static int attach_io_events(sd_bus *bus) { |
3220 | int r; | |
3221 | ||
3222 | assert(bus); | |
3223 | ||
3224 | if (bus->input_fd < 0) | |
3225 | return 0; | |
3226 | ||
3227 | if (!bus->event) | |
3228 | return 0; | |
3229 | ||
3230 | if (!bus->input_io_event_source) { | |
151b9b96 | 3231 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3232 | if (r < 0) |
3233 | return r; | |
3234 | ||
3235 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3236 | if (r < 0) | |
3237 | return r; | |
3238 | ||
3239 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3240 | if (r < 0) |
3241 | return r; | |
3242 | ||
356779df | 3243 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3244 | } else |
3245 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3246 | ||
3247 | if (r < 0) | |
3248 | return r; | |
3249 | ||
3250 | if (bus->output_fd != bus->input_fd) { | |
3251 | assert(bus->output_fd >= 0); | |
3252 | ||
3253 | if (!bus->output_io_event_source) { | |
151b9b96 | 3254 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3255 | if (r < 0) |
3256 | return r; | |
3257 | ||
3258 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3259 | if (r < 0) |
3260 | return r; | |
3261 | ||
356779df | 3262 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3263 | } else |
3264 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3265 | ||
3266 | if (r < 0) | |
3267 | return r; | |
3268 | } | |
3269 | ||
3270 | return 0; | |
3271 | } | |
3272 | ||
3273 | static void detach_io_events(sd_bus *bus) { | |
3274 | assert(bus); | |
3275 | ||
3276 | if (bus->input_io_event_source) { | |
3277 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3278 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3279 | } | |
3280 | ||
3281 | if (bus->output_io_event_source) { | |
3282 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3283 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3284 | } | |
3285 | } | |
3286 | ||
d9f644e2 | 3287 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3288 | int r; |
3289 | ||
3290 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3291 | assert_return(!bus->event, -EBUSY); |
3292 | ||
3293 | assert(!bus->input_io_event_source); | |
3294 | assert(!bus->output_io_event_source); | |
3295 | assert(!bus->time_event_source); | |
3296 | ||
76b54375 LP |
3297 | if (event) |
3298 | bus->event = sd_event_ref(event); | |
3299 | else { | |
3300 | r = sd_event_default(&bus->event); | |
3301 | if (r < 0) | |
3302 | return r; | |
3303 | } | |
40ca29a1 | 3304 | |
1e05d493 | 3305 | bus->event_priority = priority; |
40ca29a1 | 3306 | |
6a0f1f6d | 3307 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3308 | if (r < 0) |
3309 | goto fail; | |
3310 | ||
3311 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3312 | if (r < 0) | |
3313 | goto fail; | |
3314 | ||
356779df | 3315 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3316 | if (r < 0) |
3317 | goto fail; | |
3318 | ||
151b9b96 | 3319 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3320 | if (r < 0) |
3321 | goto fail; | |
3322 | ||
356779df | 3323 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3324 | if (r < 0) |
3325 | goto fail; | |
3326 | ||
1e05d493 LP |
3327 | r = attach_io_events(bus); |
3328 | if (r < 0) | |
3329 | goto fail; | |
3330 | ||
40ca29a1 LP |
3331 | return 0; |
3332 | ||
3333 | fail: | |
3334 | sd_bus_detach_event(bus); | |
3335 | return r; | |
3336 | } | |
3337 | ||
d9f644e2 | 3338 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3339 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3340 | |
3341 | if (!bus->event) | |
3342 | return 0; | |
40ca29a1 | 3343 | |
1e05d493 | 3344 | detach_io_events(bus); |
40ca29a1 | 3345 | |
86befb40 LP |
3346 | if (bus->time_event_source) { |
3347 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3348 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3349 | } |
40ca29a1 | 3350 | |
86befb40 LP |
3351 | if (bus->quit_event_source) { |
3352 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3353 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3354 | } |
abc5fe72 | 3355 | |
93f1bcf4 | 3356 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3357 | return 1; |
40ca29a1 | 3358 | } |
affff0b6 | 3359 | |
2be44176 LP |
3360 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3361 | assert_return(bus, NULL); | |
3362 | ||
3363 | return bus->event; | |
3364 | } | |
3365 | ||
19befb2d LP |
3366 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3367 | assert_return(bus, NULL); | |
3368 | ||
3369 | return bus->current_message; | |
3370 | } | |
3371 | ||
3372 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3373 | assert_return(bus, NULL); |
3374 | ||
19befb2d | 3375 | return bus->current_slot; |
affff0b6 | 3376 | } |
76b54375 | 3377 | |
caa82984 LP |
3378 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3379 | assert_return(bus, NULL); | |
3380 | ||
3381 | return bus->current_handler; | |
3382 | } | |
3383 | ||
3384 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3385 | assert_return(bus, NULL); | |
3386 | ||
3387 | return bus->current_userdata; | |
3388 | } | |
3389 | ||
76b54375 LP |
3390 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3391 | sd_bus *b = NULL; | |
3392 | int r; | |
3393 | ||
3394 | assert(bus_open); | |
3395 | assert(default_bus); | |
3396 | ||
3397 | if (!ret) | |
3398 | return !!*default_bus; | |
3399 | ||
3400 | if (*default_bus) { | |
3401 | *ret = sd_bus_ref(*default_bus); | |
3402 | return 0; | |
3403 | } | |
3404 | ||
3405 | r = bus_open(&b); | |
3406 | if (r < 0) | |
3407 | return r; | |
3408 | ||
3409 | b->default_bus_ptr = default_bus; | |
3410 | b->tid = gettid(); | |
3411 | *default_bus = b; | |
3412 | ||
3413 | *ret = b; | |
3414 | return 1; | |
3415 | } | |
3416 | ||
3417 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3418 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3419 | } | |
3420 | ||
76b54375 | 3421 | |
fa2f8973 | 3422 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3423 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3424 | } | |
3425 | ||
af08d2f9 LP |
3426 | _public_ int sd_bus_default(sd_bus **ret) { |
3427 | ||
3428 | const char *e; | |
3429 | ||
3430 | /* Let's try our best to reuse another cached connection. If | |
3431 | * the starter bus type is set, connect via our normal | |
3432 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3433 | * we can share the connection with the user/system default | |
3434 | * bus. */ | |
3435 | ||
3436 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3437 | if (e) { | |
3438 | if (streq(e, "system")) | |
3439 | return sd_bus_default_system(ret); | |
09365592 | 3440 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3441 | return sd_bus_default_user(ret); |
3442 | } | |
3443 | ||
3444 | /* No type is specified, so we have not other option than to | |
3445 | * use the starter address if it is set. */ | |
3446 | ||
3447 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3448 | if (e) { | |
af08d2f9 LP |
3449 | |
3450 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3451 | } | |
3452 | ||
3453 | /* Finally, if nothing is set use the cached connection for | |
3454 | * the right scope */ | |
3455 | ||
3456 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3457 | return sd_bus_default_user(ret); | |
3458 | else | |
3459 | return sd_bus_default_system(ret); | |
3460 | } | |
3461 | ||
76b54375 LP |
3462 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3463 | assert_return(b, -EINVAL); | |
3464 | assert_return(tid, -EINVAL); | |
3465 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3466 | ||
3467 | if (b->tid != 0) { | |
3468 | *tid = b->tid; | |
3469 | return 0; | |
3470 | } | |
3471 | ||
3472 | if (b->event) | |
3473 | return sd_event_get_tid(b->event, tid); | |
3474 | ||
3475 | return -ENXIO; | |
3476 | } | |
28383ba1 | 3477 | |
a6278b88 LP |
3478 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3479 | _cleanup_free_ char *e = NULL; | |
3480 | char *ret; | |
3481 | ||
3482 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3483 | assert_return(external_id, -EINVAL); | |
3484 | assert_return(ret_path, -EINVAL); | |
3485 | ||
3486 | e = bus_label_escape(external_id); | |
3487 | if (!e) | |
3488 | return -ENOMEM; | |
3489 | ||
605405c6 | 3490 | ret = strjoin(prefix, "/", e); |
a6278b88 LP |
3491 | if (!ret) |
3492 | return -ENOMEM; | |
3493 | ||
3494 | *ret_path = ret; | |
3495 | return 0; | |
28383ba1 LP |
3496 | } |
3497 | ||
a6278b88 LP |
3498 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3499 | const char *e; | |
3500 | char *ret; | |
3501 | ||
3502 | assert_return(object_path_is_valid(path), -EINVAL); | |
3503 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3504 | assert_return(external_id, -EINVAL); | |
3505 | ||
3506 | e = object_path_startswith(path, prefix); | |
3507 | if (!e) { | |
3508 | *external_id = NULL; | |
3509 | return 0; | |
3510 | } | |
3511 | ||
3512 | ret = bus_label_unescape(e); | |
3513 | if (!ret) | |
3514 | return -ENOMEM; | |
3515 | ||
3516 | *external_id = ret; | |
3517 | return 1; | |
28383ba1 | 3518 | } |
5b12334d | 3519 | |
dfb815c3 DH |
3520 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3521 | _cleanup_strv_free_ char **labels = NULL; | |
3522 | char *path, *path_pos, **label_pos; | |
3523 | const char *sep, *template_pos; | |
3524 | size_t path_length; | |
3525 | va_list list; | |
3526 | int r; | |
3527 | ||
3528 | assert_return(out, -EINVAL); | |
3529 | assert_return(path_template, -EINVAL); | |
3530 | ||
3531 | path_length = strlen(path_template); | |
3532 | ||
19932084 | 3533 | va_start(list, path_template); |
dfb815c3 DH |
3534 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3535 | const char *arg; | |
3536 | char *label; | |
3537 | ||
3538 | arg = va_arg(list, const char *); | |
3539 | if (!arg) { | |
3540 | va_end(list); | |
3541 | return -EINVAL; | |
3542 | } | |
3543 | ||
3544 | label = bus_label_escape(arg); | |
3545 | if (!label) { | |
3546 | va_end(list); | |
3547 | return -ENOMEM; | |
3548 | } | |
3549 | ||
3550 | r = strv_consume(&labels, label); | |
3551 | if (r < 0) { | |
3552 | va_end(list); | |
3553 | return r; | |
3554 | } | |
3555 | ||
3556 | /* add label length, but account for the format character */ | |
3557 | path_length += strlen(label) - 1; | |
3558 | } | |
3559 | va_end(list); | |
3560 | ||
3561 | path = malloc(path_length + 1); | |
3562 | if (!path) | |
3563 | return -ENOMEM; | |
3564 | ||
3565 | path_pos = path; | |
3566 | label_pos = labels; | |
3567 | ||
3568 | for (template_pos = path_template; *template_pos; ) { | |
3569 | sep = strchrnul(template_pos, '%'); | |
3570 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3571 | if (!*sep) | |
3572 | break; | |
3573 | ||
3574 | path_pos = stpcpy(path_pos, *label_pos++); | |
3575 | template_pos = sep + 1; | |
3576 | } | |
3577 | ||
3578 | *path_pos = 0; | |
3579 | *out = path; | |
3580 | return 0; | |
3581 | } | |
3582 | ||
3583 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3584 | _cleanup_strv_free_ char **labels = NULL; | |
3585 | const char *template_pos, *path_pos; | |
3586 | char **label_pos; | |
3587 | va_list list; | |
3588 | int r; | |
3589 | ||
3590 | /* | |
3591 | * This decodes an object-path based on a template argument. The | |
3592 | * template consists of a verbatim path, optionally including special | |
3593 | * directives: | |
3594 | * | |
3595 | * - Each occurrence of '%' in the template matches an arbitrary | |
3596 | * substring of a label in the given path. At most one such | |
3597 | * directive is allowed per label. For each such directive, the | |
3598 | * caller must provide an output parameter (char **) via va_arg. If | |
3599 | * NULL is passed, the given label is verified, but not returned. | |
3600 | * For each matched label, the *decoded* label is stored in the | |
3601 | * passed output argument, and the caller is responsible to free | |
3602 | * it. Note that the output arguments are only modified if the | |
3603 | * actualy path matched the template. Otherwise, they're left | |
3604 | * untouched. | |
3605 | * | |
3606 | * This function returns <0 on error, 0 if the path does not match the | |
3607 | * template, 1 if it matched. | |
3608 | */ | |
3609 | ||
3610 | assert_return(path, -EINVAL); | |
3611 | assert_return(path_template, -EINVAL); | |
3612 | ||
3613 | path_pos = path; | |
3614 | ||
3615 | for (template_pos = path_template; *template_pos; ) { | |
3616 | const char *sep; | |
3617 | size_t length; | |
3618 | char *label; | |
3619 | ||
3620 | /* verify everything until the next '%' matches verbatim */ | |
3621 | sep = strchrnul(template_pos, '%'); | |
3622 | length = sep - template_pos; | |
3623 | if (strncmp(path_pos, template_pos, length)) | |
3624 | return 0; | |
3625 | ||
3626 | path_pos += length; | |
3627 | template_pos += length; | |
3628 | ||
3629 | if (!*template_pos) | |
3630 | break; | |
3631 | ||
3632 | /* We found the next '%' character. Everything up until here | |
3633 | * matched. We now skip ahead to the end of this label and make | |
3634 | * sure it matches the tail of the label in the path. Then we | |
3635 | * decode the string in-between and save it for later use. */ | |
3636 | ||
3637 | ++template_pos; /* skip over '%' */ | |
3638 | ||
3639 | sep = strchrnul(template_pos, '/'); | |
3640 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3641 | ||
3642 | /* verify the suffixes match */ | |
3643 | sep = strchrnul(path_pos, '/'); | |
3644 | if (sep - path_pos < (ssize_t)length || | |
3645 | strncmp(sep - length, template_pos, length)) | |
3646 | return 0; | |
3647 | ||
3648 | template_pos += length; /* skip over matched label */ | |
3649 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3650 | ||
3651 | /* store unescaped label for later use */ | |
3652 | label = bus_label_unescape_n(path_pos, length); | |
3653 | if (!label) | |
3654 | return -ENOMEM; | |
3655 | ||
3656 | r = strv_consume(&labels, label); | |
3657 | if (r < 0) | |
3658 | return r; | |
3659 | ||
3660 | path_pos = sep; /* skip decoded label and suffix */ | |
3661 | } | |
3662 | ||
3663 | /* end of template must match end of path */ | |
3664 | if (*path_pos) | |
3665 | return 0; | |
3666 | ||
3667 | /* copy the labels over to the caller */ | |
19932084 | 3668 | va_start(list, path_template); |
dfb815c3 DH |
3669 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3670 | char **arg; | |
3671 | ||
3672 | arg = va_arg(list, char **); | |
3673 | if (arg) | |
3674 | *arg = *label_pos; | |
3675 | else | |
3676 | free(*label_pos); | |
3677 | } | |
3678 | va_end(list); | |
3679 | ||
3680 | free(labels); | |
3681 | labels = NULL; | |
3682 | return 1; | |
3683 | } | |
3684 | ||
ae095f86 LP |
3685 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3686 | int r; | |
3687 | ||
3688 | assert_return(bus, -EINVAL); | |
ae095f86 | 3689 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3690 | |
3691 | if (!bus->is_kernel) | |
15411c0c | 3692 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3693 | |
3694 | if (!BUS_IS_OPEN(bus->state)) | |
3695 | return -ENOTCONN; | |
ae095f86 | 3696 | |
bd746b8b LP |
3697 | if (bus->rqueue_size > 0) |
3698 | return -EBUSY; | |
3699 | ||
14f862a5 LP |
3700 | if (bus->wqueue_size > 0) |
3701 | return -EBUSY; | |
3702 | ||
ae095f86 LP |
3703 | r = bus_kernel_try_close(bus); |
3704 | if (r < 0) | |
3705 | return r; | |
3706 | ||
3707 | sd_bus_close(bus); | |
3708 | return 0; | |
3709 | } | |
5972fe95 | 3710 | |
455971c1 | 3711 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3712 | assert_return(bus, -EINVAL); |
455971c1 | 3713 | assert_return(description, -EINVAL); |
f4b2933e | 3714 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3715 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3716 | ||
455971c1 | 3717 | *description = bus->description; |
5972fe95 LP |
3718 | return 0; |
3719 | } | |
fe3f22d1 DK |
3720 | |
3721 | int bus_get_root_path(sd_bus *bus) { | |
3722 | int r; | |
3723 | ||
3724 | if (bus->cgroup_root) | |
3725 | return 0; | |
3726 | ||
3727 | r = cg_get_root_path(&bus->cgroup_root); | |
3728 | if (r == -ENOENT) { | |
3729 | bus->cgroup_root = strdup("/"); | |
3730 | if (!bus->cgroup_root) | |
3731 | return -ENOMEM; | |
3732 | ||
3733 | r = 0; | |
3734 | } | |
3735 | ||
3736 | return r; | |
3737 | } | |
3acc1daf LP |
3738 | |
3739 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3740 | int r; | |
3741 | ||
3742 | assert_return(bus, -EINVAL); | |
3743 | assert_return(scope, -EINVAL); | |
3744 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3745 | ||
3746 | if (bus->is_kernel) { | |
3747 | _cleanup_free_ char *n = NULL; | |
3748 | const char *dash; | |
3749 | ||
3750 | r = bus_kernel_get_bus_name(bus, &n); | |
3751 | if (r < 0) | |
3752 | return r; | |
3753 | ||
3754 | if (streq(n, "0-system")) { | |
3755 | *scope = "system"; | |
5b820358 | 3756 | return 0; |
3acc1daf LP |
3757 | } |
3758 | ||
3759 | dash = strchr(n, '-'); | |
d2df88ff | 3760 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3761 | *scope = "user"; |
5b820358 | 3762 | return 0; |
3acc1daf LP |
3763 | } |
3764 | } | |
3765 | ||
3766 | if (bus->is_user) { | |
3767 | *scope = "user"; | |
5b820358 | 3768 | return 0; |
3acc1daf LP |
3769 | } |
3770 | ||
3771 | if (bus->is_system) { | |
3772 | *scope = "system"; | |
5b820358 LP |
3773 | return 0; |
3774 | } | |
3775 | ||
3776 | return -ENODATA; | |
3777 | } | |
3778 | ||
3779 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3780 | ||
3781 | assert_return(bus, -EINVAL); | |
3782 | assert_return(address, -EINVAL); | |
3783 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3784 | ||
3785 | if (bus->address) { | |
3786 | *address = bus->address; | |
3787 | return 0; | |
3acc1daf LP |
3788 | } |
3789 | ||
3790 | return -ENODATA; | |
3791 | } | |
224b3787 | 3792 | |
882897af | 3793 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3794 | assert_return(bus, -EINVAL); |
3795 | assert_return(mask, -EINVAL); | |
3796 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3797 | ||
3798 | *mask = bus->creds_mask; | |
3799 | return 0; | |
3800 | } | |
3801 | ||
882897af | 3802 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3803 | assert_return(bus, -EINVAL); |
3804 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3805 | ||
3806 | return bus->bus_client; | |
3807 | } | |
3808 | ||
882897af | 3809 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3810 | assert_return(bus, -EINVAL); |
3811 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3812 | ||
3813 | return bus->is_server; | |
3814 | } | |
3815 | ||
882897af | 3816 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3817 | assert_return(bus, -EINVAL); |
3818 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3819 | ||
3820 | return bus->anonymous_auth; | |
3821 | } | |
3822 | ||
882897af | 3823 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3824 | assert_return(bus, -EINVAL); |
3825 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3826 | ||
3827 | return bus->trusted; | |
3828 | } | |
3829 | ||
882897af | 3830 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3831 | assert_return(bus, -EINVAL); |
3832 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3833 | ||
3834 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3835 | } | |
fa2f8973 LP |
3836 | |
3837 | static void flush_close(sd_bus *bus) { | |
3838 | if (!bus) | |
3839 | return; | |
3840 | ||
3841 | /* Flushes and closes the specified bus. We take a ref before, | |
3842 | * to ensure the flushing does not cause the bus to be | |
3843 | * unreferenced. */ | |
3844 | ||
3845 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
3846 | } | |
3847 | ||
3848 | _public_ void sd_bus_default_flush_close(void) { | |
3849 | flush_close(default_starter_bus); | |
3850 | flush_close(default_user_bus); | |
3851 | flush_close(default_system_bus); | |
3852 | } | |
fbb4603d LP |
3853 | |
3854 | _public_ int sd_bus_set_exit_on_disconnect(sd_bus *bus, int b) { | |
3855 | assert_return(bus, -EINVAL); | |
3856 | ||
3857 | /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already | |
3858 | * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never | |
3859 | * from the client side. */ | |
3860 | bus->exit_on_disconnect = b; | |
3861 | ||
3862 | /* If the exit condition was triggered already, exit immediately. */ | |
3863 | return bus_exit_now(bus); | |
3864 | } | |
3865 | ||
3866 | _public_ int sd_bus_get_exit_on_disconnect(sd_bus *bus) { | |
3867 | assert_return(bus, -EINVAL); | |
3868 | ||
3869 | return bus->exit_on_disconnect; | |
3870 | } |