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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <endian.h> | |
de1c301e LP |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
25 | #include <netdb.h> | |
0a6f50c0 | 26 | #include <poll.h> |
63edf05e | 27 | #include <sys/mman.h> |
45fbe937 | 28 | #include <pthread.h> |
de1c301e LP |
29 | |
30 | #include "util.h" | |
31 | #include "macro.h" | |
2fd9ae2e | 32 | #include "strv.h" |
6c03089c | 33 | #include "missing.h" |
ab9001a1 | 34 | #include "def.h" |
af08d2f9 | 35 | #include "cgroup-util.h" |
25300b5a | 36 | #include "hostname-util.h" |
f01de965 | 37 | #include "bus-label.h" |
de1c301e LP |
38 | |
39 | #include "sd-bus.h" | |
40 | #include "bus-internal.h" | |
41 | #include "bus-message.h" | |
42 | #include "bus-type.h" | |
a7e3212d | 43 | #include "bus-socket.h" |
6629161f | 44 | #include "bus-kernel.h" |
392d5b37 | 45 | #include "bus-control.h" |
992c052c | 46 | #include "bus-objects.h" |
057171ef | 47 | #include "bus-util.h" |
a7893c6b | 48 | #include "bus-container.h" |
0461f8cd | 49 | #include "bus-protocol.h" |
8f8f05a9 | 50 | #include "bus-track.h" |
19befb2d | 51 | #include "bus-slot.h" |
de1c301e | 52 | |
b56c4604 LP |
53 | #define log_debug_bus_message(m) \ |
54 | do { \ | |
55 | sd_bus_message *_mm = (m); \ | |
56 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", \ | |
57 | bus_message_type_to_string(_mm->header->type), \ | |
58 | strna(sd_bus_message_get_sender(_mm)), \ | |
59 | strna(sd_bus_message_get_destination(_mm)), \ | |
60 | strna(sd_bus_message_get_path(_mm)), \ | |
61 | strna(sd_bus_message_get_interface(_mm)), \ | |
62 | strna(sd_bus_message_get_member(_mm)), \ | |
63 | BUS_MESSAGE_COOKIE(_mm), \ | |
64 | _mm->reply_cookie, \ | |
65 | strna(_mm->error.message)); \ | |
66 | } while (false) | |
f9f97ca6 | 67 | |
e3017af9 | 68 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
69 | static int attach_io_events(sd_bus *b); |
70 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 71 | |
fa2f8973 LP |
72 | static thread_local sd_bus *default_system_bus = NULL; |
73 | static thread_local sd_bus *default_user_bus = NULL; | |
74 | static thread_local sd_bus *default_starter_bus = NULL; | |
75 | ||
f54514f3 LP |
76 | static void bus_close_fds(sd_bus *b) { |
77 | assert(b); | |
78 | ||
1e05d493 LP |
79 | detach_io_events(b); |
80 | ||
0fd8d506 | 81 | if (b->input_fd != b->output_fd) |
03e334a1 | 82 | safe_close(b->output_fd); |
0fd8d506 | 83 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
84 | } |
85 | ||
0e586eae | 86 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
87 | assert(b); |
88 | ||
f389bf15 LP |
89 | while (b->rqueue_size > 0) |
90 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
91 | ||
253f96e5 | 92 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 93 | b->rqueue_allocated = 0; |
0e586eae | 94 | |
f389bf15 LP |
95 | while (b->wqueue_size > 0) |
96 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 97 | |
253f96e5 | 98 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 99 | b->wqueue_allocated = 0; |
0e586eae LP |
100 | } |
101 | ||
de1c301e | 102 | static void bus_free(sd_bus *b) { |
19befb2d | 103 | sd_bus_slot *s; |
de1c301e LP |
104 | |
105 | assert(b); | |
8f8f05a9 LP |
106 | assert(!b->track_queue); |
107 | ||
19befb2d LP |
108 | b->state = BUS_CLOSED; |
109 | ||
40ca29a1 LP |
110 | sd_bus_detach_event(b); |
111 | ||
19befb2d LP |
112 | while ((s = b->slots)) { |
113 | /* At this point only floating slots can still be | |
114 | * around, because the non-floating ones keep a | |
115 | * reference to the bus, and we thus couldn't be | |
116 | * destructing right now... We forcibly disconnect the | |
117 | * slots here, so that they still can be referenced by | |
118 | * apps, but are dead. */ | |
119 | ||
120 | assert(s->floating); | |
121 | bus_slot_disconnect(s); | |
122 | sd_bus_slot_unref(s); | |
123 | } | |
124 | ||
f4d140e9 LP |
125 | if (b->default_bus_ptr) |
126 | *b->default_bus_ptr = NULL; | |
127 | ||
f54514f3 | 128 | bus_close_fds(b); |
de1c301e | 129 | |
63edf05e LP |
130 | if (b->kdbus_buffer) |
131 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
132 | ||
c4e6556c | 133 | free(b->label); |
de1c301e | 134 | free(b->rbuffer); |
89ffcd2a | 135 | free(b->unique_name); |
2181a7f5 | 136 | free(b->auth_buffer); |
89ffcd2a | 137 | free(b->address); |
e9a967f9 | 138 | free(b->kernel); |
a7893c6b | 139 | free(b->machine); |
8a0e0ed9 | 140 | free(b->fake_label); |
751bc6ac | 141 | free(b->cgroup_root); |
455971c1 | 142 | free(b->description); |
89ffcd2a | 143 | |
2fd9ae2e LP |
144 | free(b->exec_path); |
145 | strv_free(b->exec_argv); | |
146 | ||
2c93b4ef LP |
147 | close_many(b->fds, b->n_fds); |
148 | free(b->fds); | |
149 | ||
0e586eae | 150 | bus_reset_queues(b); |
de1c301e | 151 | |
c9fe4af7 | 152 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 153 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 154 | |
75a0da95 | 155 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
156 | bus_match_free(&b->match_callbacks); |
157 | ||
29ddb38f LP |
158 | hashmap_free_free(b->vtable_methods); |
159 | hashmap_free_free(b->vtable_properties); | |
160 | ||
19befb2d | 161 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
162 | hashmap_free(b->nodes); |
163 | ||
bc7fd8cd LP |
164 | bus_kernel_flush_memfd(b); |
165 | ||
45fbe937 LP |
166 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
167 | ||
de1c301e LP |
168 | free(b); |
169 | } | |
170 | ||
d9f644e2 | 171 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
172 | sd_bus *r; |
173 | ||
d6888822 | 174 | assert_return(ret, -EINVAL); |
021a1e78 | 175 | |
de1c301e LP |
176 | r = new0(sd_bus, 1); |
177 | if (!r) | |
021a1e78 | 178 | return -ENOMEM; |
de1c301e | 179 | |
e4ee6e5c | 180 | r->n_ref = REFCNT_INIT; |
e82c9509 | 181 | r->input_fd = r->output_fd = -1; |
de1c301e | 182 | r->message_version = 1; |
3310dfd5 | 183 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 184 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 185 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 186 | r->original_pid = getpid(); |
de1c301e | 187 | |
45fbe937 LP |
188 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
189 | ||
de1c301e LP |
190 | /* We guarantee that wqueue always has space for at least one |
191 | * entry */ | |
821e0756 | 192 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 193 | free(r); |
021a1e78 | 194 | return -ENOMEM; |
de1c301e LP |
195 | } |
196 | ||
021a1e78 LP |
197 | *ret = r; |
198 | return 0; | |
199 | } | |
200 | ||
d9f644e2 | 201 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
202 | char *a; |
203 | ||
d6888822 LP |
204 | assert_return(bus, -EINVAL); |
205 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
206 | assert_return(address, -EINVAL); | |
207 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
208 | |
209 | a = strdup(address); | |
210 | if (!a) | |
211 | return -ENOMEM; | |
212 | ||
213 | free(bus->address); | |
214 | bus->address = a; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
d9f644e2 | 219 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
220 | assert_return(bus, -EINVAL); |
221 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
222 | assert_return(input_fd >= 0, -EBADF); |
223 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 224 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 225 | |
e82c9509 LP |
226 | bus->input_fd = input_fd; |
227 | bus->output_fd = output_fd; | |
021a1e78 LP |
228 | return 0; |
229 | } | |
230 | ||
d9f644e2 | 231 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
232 | char *p, **a; |
233 | ||
d6888822 LP |
234 | assert_return(bus, -EINVAL); |
235 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
236 | assert_return(path, -EINVAL); | |
237 | assert_return(!strv_isempty(argv), -EINVAL); | |
238 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
239 | |
240 | p = strdup(path); | |
241 | if (!p) | |
242 | return -ENOMEM; | |
243 | ||
244 | a = strv_copy(argv); | |
245 | if (!a) { | |
246 | free(p); | |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | free(bus->exec_path); | |
251 | strv_free(bus->exec_argv); | |
252 | ||
253 | bus->exec_path = p; | |
254 | bus->exec_argv = a; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
d9f644e2 | 259 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
260 | assert_return(bus, -EINVAL); |
261 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
262 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 263 | |
94bbf1ba | 264 | bus->bus_client = !!b; |
021a1e78 LP |
265 | return 0; |
266 | } | |
267 | ||
09365592 LP |
268 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
269 | assert_return(bus, -EINVAL); | |
270 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
271 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
272 | ||
273 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
274 | return 0; | |
275 | } | |
276 | ||
d9f644e2 | 277 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
278 | assert_return(bus, -EINVAL); |
279 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
280 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 281 | |
264ad849 LP |
282 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
283 | return 0; | |
284 | } | |
285 | ||
4fc31988 | 286 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 287 | uint64_t new_flags; |
16be4368 | 288 | assert_return(bus, -EINVAL); |
b5dae4c7 | 289 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
290 | assert_return(!bus_pid_changed(bus), -ECHILD); |
291 | ||
b5dae4c7 LP |
292 | new_flags = bus->attach_flags; |
293 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
294 | ||
295 | if (bus->attach_flags == new_flags) | |
296 | return 0; | |
297 | ||
298 | bus->attach_flags = new_flags; | |
299 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
300 | bus_kernel_realize_attach_flags(bus); | |
301 | ||
16be4368 KS |
302 | return 0; |
303 | } | |
304 | ||
b5dae4c7 LP |
305 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
306 | uint64_t new_flags; | |
307 | ||
16be4368 | 308 | assert_return(bus, -EINVAL); |
95c4fe82 | 309 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 310 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
311 | assert_return(!bus_pid_changed(bus), -ECHILD); |
312 | ||
b5dae4c7 LP |
313 | if (b) |
314 | bus->creds_mask |= mask; | |
315 | else | |
316 | bus->creds_mask &= ~mask; | |
317 | ||
49b832c5 | 318 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
319 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
320 | ||
321 | /* Make sure we don't lose the timestamp flag */ | |
322 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
323 | if (bus->attach_flags == new_flags) | |
324 | return 0; | |
49b832c5 | 325 | |
b5dae4c7 LP |
326 | bus->attach_flags = new_flags; |
327 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
328 | bus_kernel_realize_attach_flags(bus); | |
329 | ||
330 | return 0; | |
021a1e78 | 331 | } |
de1c301e | 332 | |
d9f644e2 | 333 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
334 | assert_return(bus, -EINVAL); |
335 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
336 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
337 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
338 | |
339 | bus->is_server = !!b; | |
98178d39 | 340 | bus->server_id = server_id; |
2181a7f5 LP |
341 | return 0; |
342 | } | |
343 | ||
d9f644e2 | 344 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
345 | assert_return(bus, -EINVAL); |
346 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
347 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
348 | |
349 | bus->anonymous_auth = !!b; | |
350 | return 0; | |
351 | } | |
352 | ||
adacb957 LP |
353 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
354 | assert_return(bus, -EINVAL); | |
355 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
356 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
357 | ||
358 | bus->trusted = !!b; | |
359 | return 0; | |
360 | } | |
361 | ||
455971c1 | 362 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 363 | assert_return(bus, -EINVAL); |
5972fe95 LP |
364 | assert_return(bus->state == BUS_UNSET, -EPERM); |
365 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
366 | ||
d1b91c99 | 367 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
368 | } |
369 | ||
c0765ddb LP |
370 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
371 | assert_return(bus, -EINVAL); | |
372 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
373 | ||
374 | bus->allow_interactive_authorization = !!b; | |
375 | return 0; | |
376 | } | |
377 | ||
378 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
379 | assert_return(bus, -EINVAL); | |
380 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
381 | ||
382 | return bus->allow_interactive_authorization; | |
383 | } | |
384 | ||
19070062 | 385 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 386 | const char *s; |
19070062 | 387 | sd_bus *bus; |
de1c301e LP |
388 | int r; |
389 | ||
19070062 LP |
390 | assert(reply); |
391 | bus = reply->bus; | |
de1c301e | 392 | assert(bus); |
c99c09a2 | 393 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 394 | |
40ca29a1 | 395 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
396 | if (r > 0) |
397 | return -r; | |
eb01ba5d | 398 | |
de1c301e LP |
399 | r = sd_bus_message_read(reply, "s", &s); |
400 | if (r < 0) | |
401 | return r; | |
402 | ||
dafb7591 LP |
403 | if (!service_name_is_valid(s) || s[0] != ':') |
404 | return -EBADMSG; | |
405 | ||
de1c301e LP |
406 | bus->unique_name = strdup(s); |
407 | if (!bus->unique_name) | |
408 | return -ENOMEM; | |
409 | ||
c99c09a2 LP |
410 | if (bus->state == BUS_HELLO) |
411 | bus->state = BUS_RUNNING; | |
dafb7591 | 412 | |
de1c301e LP |
413 | return 1; |
414 | } | |
415 | ||
416 | static int bus_send_hello(sd_bus *bus) { | |
417 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
418 | int r; | |
419 | ||
420 | assert(bus); | |
421 | ||
6629161f | 422 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
423 | return 0; |
424 | ||
de1c301e LP |
425 | r = sd_bus_message_new_method_call( |
426 | bus, | |
151b9b96 | 427 | &m, |
de1c301e | 428 | "org.freedesktop.DBus", |
a7639e37 | 429 | "/org/freedesktop/DBus", |
de1c301e | 430 | "org.freedesktop.DBus", |
151b9b96 | 431 | "Hello"); |
de1c301e LP |
432 | if (r < 0) |
433 | return r; | |
434 | ||
19befb2d | 435 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
436 | } |
437 | ||
a7e3212d | 438 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
439 | assert(bus); |
440 | ||
f08838da | 441 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 442 | bus->state = BUS_HELLO; |
e3017af9 | 443 | return 1; |
de1c301e LP |
444 | } |
445 | ||
446 | bus->state = BUS_RUNNING; | |
e3017af9 | 447 | return 1; |
de1c301e LP |
448 | } |
449 | ||
450 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 451 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
452 | const char *a; |
453 | char *r = NULL; | |
454 | ||
455 | assert(p); | |
456 | assert(*p); | |
de1c301e LP |
457 | assert(value); |
458 | ||
2fd9ae2e LP |
459 | if (key) { |
460 | l = strlen(key); | |
461 | if (strncmp(*p, key, l) != 0) | |
462 | return 0; | |
de1c301e | 463 | |
2fd9ae2e LP |
464 | if ((*p)[l] != '=') |
465 | return 0; | |
de1c301e | 466 | |
2fd9ae2e LP |
467 | if (*value) |
468 | return -EINVAL; | |
de1c301e | 469 | |
2fd9ae2e LP |
470 | a = *p + l + 1; |
471 | } else | |
472 | a = *p; | |
473 | ||
474 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 475 | char c; |
de1c301e LP |
476 | |
477 | if (*a == '%') { | |
478 | int x, y; | |
479 | ||
480 | x = unhexchar(a[1]); | |
481 | if (x < 0) { | |
482 | free(r); | |
483 | return x; | |
484 | } | |
485 | ||
486 | y = unhexchar(a[2]); | |
487 | if (y < 0) { | |
488 | free(r); | |
489 | return y; | |
490 | } | |
491 | ||
de1c301e | 492 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
493 | a += 3; |
494 | } else { | |
de1c301e | 495 | c = *a; |
89ffcd2a LP |
496 | a++; |
497 | } | |
de1c301e | 498 | |
821e0756 | 499 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 500 | return -ENOMEM; |
de1c301e | 501 | |
de1c301e LP |
502 | r[n++] = c; |
503 | } | |
504 | ||
89ffcd2a LP |
505 | if (!r) { |
506 | r = strdup(""); | |
507 | if (!r) | |
508 | return -ENOMEM; | |
509 | } else | |
510 | r[n] = 0; | |
511 | ||
512 | if (*a == ',') | |
513 | a++; | |
514 | ||
de1c301e | 515 | *p = a; |
2fd9ae2e LP |
516 | |
517 | free(*value); | |
de1c301e | 518 | *value = r; |
2fd9ae2e | 519 | |
de1c301e LP |
520 | return 1; |
521 | } | |
522 | ||
523 | static void skip_address_key(const char **p) { | |
524 | assert(p); | |
525 | assert(*p); | |
526 | ||
89ffcd2a LP |
527 | *p += strcspn(*p, ","); |
528 | ||
529 | if (**p == ',') | |
530 | (*p) ++; | |
de1c301e LP |
531 | } |
532 | ||
2fd9ae2e LP |
533 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
534 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
535 | size_t l; | |
de1c301e LP |
536 | int r; |
537 | ||
538 | assert(b); | |
2fd9ae2e LP |
539 | assert(p); |
540 | assert(*p); | |
541 | assert(guid); | |
de1c301e | 542 | |
2fd9ae2e LP |
543 | while (**p != 0 && **p != ';') { |
544 | r = parse_address_key(p, "guid", guid); | |
545 | if (r < 0) | |
546 | return r; | |
547 | else if (r > 0) | |
548 | continue; | |
de1c301e | 549 | |
2fd9ae2e LP |
550 | r = parse_address_key(p, "path", &path); |
551 | if (r < 0) | |
552 | return r; | |
553 | else if (r > 0) | |
554 | continue; | |
de1c301e | 555 | |
2fd9ae2e LP |
556 | r = parse_address_key(p, "abstract", &abstract); |
557 | if (r < 0) | |
558 | return r; | |
559 | else if (r > 0) | |
560 | continue; | |
de1c301e | 561 | |
2fd9ae2e LP |
562 | skip_address_key(p); |
563 | } | |
de1c301e | 564 | |
2fd9ae2e LP |
565 | if (!path && !abstract) |
566 | return -EINVAL; | |
de1c301e | 567 | |
2fd9ae2e LP |
568 | if (path && abstract) |
569 | return -EINVAL; | |
570 | ||
571 | if (path) { | |
572 | l = strlen(path); | |
573 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
574 | return -E2BIG; | |
de1c301e | 575 | |
2fd9ae2e LP |
576 | b->sockaddr.un.sun_family = AF_UNIX; |
577 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
578 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
579 | } else if (abstract) { | |
580 | l = strlen(abstract); | |
581 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
582 | return -E2BIG; | |
583 | ||
584 | b->sockaddr.un.sun_family = AF_UNIX; | |
585 | b->sockaddr.un.sun_path[0] = 0; | |
586 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
587 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
588 | } | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
594 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 595 | int r; |
b92bea5d ZJS |
596 | struct addrinfo *result, hints = { |
597 | .ai_socktype = SOCK_STREAM, | |
598 | .ai_flags = AI_ADDRCONFIG, | |
599 | }; | |
2fd9ae2e LP |
600 | |
601 | assert(b); | |
602 | assert(p); | |
603 | assert(*p); | |
604 | assert(guid); | |
605 | ||
606 | while (**p != 0 && **p != ';') { | |
607 | r = parse_address_key(p, "guid", guid); | |
608 | if (r < 0) | |
609 | return r; | |
610 | else if (r > 0) | |
611 | continue; | |
612 | ||
613 | r = parse_address_key(p, "host", &host); | |
614 | if (r < 0) | |
615 | return r; | |
616 | else if (r > 0) | |
617 | continue; | |
618 | ||
619 | r = parse_address_key(p, "port", &port); | |
620 | if (r < 0) | |
621 | return r; | |
622 | else if (r > 0) | |
623 | continue; | |
624 | ||
625 | r = parse_address_key(p, "family", &family); | |
626 | if (r < 0) | |
627 | return r; | |
628 | else if (r > 0) | |
629 | continue; | |
630 | ||
631 | skip_address_key(p); | |
632 | } | |
633 | ||
634 | if (!host || !port) | |
635 | return -EINVAL; | |
636 | ||
2fd9ae2e LP |
637 | if (family) { |
638 | if (streq(family, "ipv4")) | |
639 | hints.ai_family = AF_INET; | |
640 | else if (streq(family, "ipv6")) | |
641 | hints.ai_family = AF_INET6; | |
642 | else | |
643 | return -EINVAL; | |
644 | } | |
645 | ||
646 | r = getaddrinfo(host, port, &hints, &result); | |
647 | if (r == EAI_SYSTEM) | |
648 | return -errno; | |
649 | else if (r != 0) | |
650 | return -EADDRNOTAVAIL; | |
651 | ||
652 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
653 | b->sockaddr_size = result->ai_addrlen; | |
654 | ||
655 | freeaddrinfo(result); | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
661 | char *path = NULL; | |
662 | unsigned n_argv = 0, j; | |
663 | char **argv = NULL; | |
821e0756 | 664 | size_t allocated = 0; |
2fd9ae2e LP |
665 | int r; |
666 | ||
667 | assert(b); | |
668 | assert(p); | |
669 | assert(*p); | |
670 | assert(guid); | |
671 | ||
672 | while (**p != 0 && **p != ';') { | |
673 | r = parse_address_key(p, "guid", guid); | |
674 | if (r < 0) | |
675 | goto fail; | |
676 | else if (r > 0) | |
677 | continue; | |
678 | ||
679 | r = parse_address_key(p, "path", &path); | |
680 | if (r < 0) | |
681 | goto fail; | |
682 | else if (r > 0) | |
683 | continue; | |
684 | ||
685 | if (startswith(*p, "argv")) { | |
686 | unsigned ul; | |
687 | ||
688 | errno = 0; | |
689 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 690 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
691 | r = -EINVAL; |
692 | goto fail; | |
693 | } | |
694 | ||
695 | (*p) ++; | |
696 | ||
697 | if (ul >= n_argv) { | |
821e0756 | 698 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
699 | r = -ENOMEM; |
700 | goto fail; | |
701 | } | |
702 | ||
2fd9ae2e LP |
703 | n_argv = ul + 1; |
704 | } | |
705 | ||
706 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 707 | if (r < 0) |
2fd9ae2e | 708 | goto fail; |
de1c301e | 709 | |
2fd9ae2e | 710 | continue; |
de1c301e LP |
711 | } |
712 | ||
2fd9ae2e LP |
713 | skip_address_key(p); |
714 | } | |
de1c301e | 715 | |
5a0f6033 LP |
716 | if (!path) { |
717 | r = -EINVAL; | |
2fd9ae2e | 718 | goto fail; |
5a0f6033 | 719 | } |
de1c301e | 720 | |
2fd9ae2e LP |
721 | /* Make sure there are no holes in the array, with the |
722 | * exception of argv[0] */ | |
723 | for (j = 1; j < n_argv; j++) | |
724 | if (!argv[j]) { | |
725 | r = -EINVAL; | |
726 | goto fail; | |
727 | } | |
728 | ||
729 | if (argv && argv[0] == NULL) { | |
730 | argv[0] = strdup(path); | |
731 | if (!argv[0]) { | |
732 | r = -ENOMEM; | |
733 | goto fail; | |
734 | } | |
735 | } | |
de1c301e | 736 | |
2fd9ae2e LP |
737 | b->exec_path = path; |
738 | b->exec_argv = argv; | |
739 | return 0; | |
de1c301e | 740 | |
2fd9ae2e LP |
741 | fail: |
742 | for (j = 0; j < n_argv; j++) | |
743 | free(argv[j]); | |
744 | ||
745 | free(argv); | |
746 | free(path); | |
747 | return r; | |
748 | } | |
749 | ||
6629161f LP |
750 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
751 | _cleanup_free_ char *path = NULL; | |
752 | int r; | |
753 | ||
754 | assert(b); | |
755 | assert(p); | |
756 | assert(*p); | |
757 | assert(guid); | |
758 | ||
759 | while (**p != 0 && **p != ';') { | |
760 | r = parse_address_key(p, "guid", guid); | |
761 | if (r < 0) | |
762 | return r; | |
763 | else if (r > 0) | |
764 | continue; | |
765 | ||
766 | r = parse_address_key(p, "path", &path); | |
767 | if (r < 0) | |
768 | return r; | |
769 | else if (r > 0) | |
770 | continue; | |
771 | ||
772 | skip_address_key(p); | |
773 | } | |
774 | ||
775 | if (!path) | |
776 | return -EINVAL; | |
777 | ||
778 | free(b->kernel); | |
779 | b->kernel = path; | |
780 | path = NULL; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
bc9fd78c | 785 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 786 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
787 | int r; |
788 | ||
789 | assert(b); | |
790 | assert(p); | |
791 | assert(*p); | |
792 | assert(guid); | |
793 | ||
794 | while (**p != 0 && **p != ';') { | |
795 | r = parse_address_key(p, "guid", guid); | |
796 | if (r < 0) | |
797 | return r; | |
798 | else if (r > 0) | |
799 | continue; | |
800 | ||
801 | r = parse_address_key(p, "machine", &machine); | |
802 | if (r < 0) | |
803 | return r; | |
804 | else if (r > 0) | |
805 | continue; | |
806 | ||
ee502e0c LP |
807 | r = parse_address_key(p, "pid", &pid); |
808 | if (r < 0) | |
809 | return r; | |
810 | else if (r > 0) | |
811 | continue; | |
812 | ||
a7893c6b LP |
813 | skip_address_key(p); |
814 | } | |
815 | ||
ee502e0c | 816 | if (!machine == !pid) |
a7893c6b LP |
817 | return -EINVAL; |
818 | ||
ee502e0c LP |
819 | if (machine) { |
820 | if (!machine_name_is_valid(machine)) | |
821 | return -EINVAL; | |
b6741478 | 822 | |
ee502e0c LP |
823 | free(b->machine); |
824 | b->machine = machine; | |
825 | machine = NULL; | |
826 | } else { | |
a1e58e8e | 827 | b->machine = mfree(b->machine); |
ee502e0c LP |
828 | } |
829 | ||
830 | if (pid) { | |
831 | r = parse_pid(pid, &b->nspid); | |
832 | if (r < 0) | |
833 | return r; | |
834 | } else | |
835 | b->nspid = 0; | |
a7893c6b LP |
836 | |
837 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
838 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
839 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
840 | |
841 | return 0; | |
842 | } | |
843 | ||
bc9fd78c | 844 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 845 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
846 | int r; |
847 | ||
848 | assert(b); | |
849 | assert(p); | |
850 | assert(*p); | |
851 | assert(guid); | |
852 | ||
853 | while (**p != 0 && **p != ';') { | |
854 | r = parse_address_key(p, "guid", guid); | |
855 | if (r < 0) | |
856 | return r; | |
857 | else if (r > 0) | |
858 | continue; | |
859 | ||
860 | r = parse_address_key(p, "machine", &machine); | |
861 | if (r < 0) | |
862 | return r; | |
863 | else if (r > 0) | |
864 | continue; | |
865 | ||
ee502e0c LP |
866 | r = parse_address_key(p, "pid", &pid); |
867 | if (r < 0) | |
868 | return r; | |
869 | else if (r > 0) | |
870 | continue; | |
871 | ||
bc9fd78c LP |
872 | skip_address_key(p); |
873 | } | |
874 | ||
ee502e0c | 875 | if (!machine == !pid) |
bc9fd78c LP |
876 | return -EINVAL; |
877 | ||
ee502e0c LP |
878 | if (machine) { |
879 | if (!machine_name_is_valid(machine)) | |
880 | return -EINVAL; | |
bc9fd78c | 881 | |
ee502e0c LP |
882 | free(b->machine); |
883 | b->machine = machine; | |
884 | machine = NULL; | |
885 | } else { | |
a1e58e8e | 886 | b->machine = mfree(b->machine); |
ee502e0c LP |
887 | } |
888 | ||
889 | if (pid) { | |
890 | r = parse_pid(pid, &b->nspid); | |
891 | if (r < 0) | |
892 | return r; | |
893 | } else | |
894 | b->nspid = 0; | |
bc9fd78c | 895 | |
2fc09a9c DM |
896 | r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); |
897 | if (r < 0) | |
898 | return r; | |
bc9fd78c LP |
899 | |
900 | return 0; | |
901 | } | |
902 | ||
2fd9ae2e LP |
903 | static void bus_reset_parsed_address(sd_bus *b) { |
904 | assert(b); | |
905 | ||
906 | zero(b->sockaddr); | |
907 | b->sockaddr_size = 0; | |
ba243e51 NK |
908 | b->exec_argv = strv_free(b->exec_argv); |
909 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 910 | b->server_id = SD_ID128_NULL; |
ba243e51 NK |
911 | b->kernel = mfree(b->kernel); |
912 | b->machine = mfree(b->machine); | |
ee502e0c | 913 | b->nspid = 0; |
2fd9ae2e LP |
914 | } |
915 | ||
916 | static int bus_parse_next_address(sd_bus *b) { | |
917 | _cleanup_free_ char *guid = NULL; | |
918 | const char *a; | |
919 | int r; | |
920 | ||
921 | assert(b); | |
922 | ||
923 | if (!b->address) | |
924 | return 0; | |
925 | if (b->address[b->address_index] == 0) | |
926 | return 0; | |
927 | ||
928 | bus_reset_parsed_address(b); | |
929 | ||
930 | a = b->address + b->address_index; | |
de1c301e | 931 | |
2fd9ae2e | 932 | while (*a != 0) { |
de1c301e | 933 | |
2fd9ae2e LP |
934 | if (*a == ';') { |
935 | a++; | |
936 | continue; | |
de1c301e LP |
937 | } |
938 | ||
2fd9ae2e LP |
939 | if (startswith(a, "unix:")) { |
940 | a += 5; | |
de1c301e | 941 | |
2fd9ae2e | 942 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
943 | if (r < 0) |
944 | return r; | |
2fd9ae2e | 945 | break; |
de1c301e | 946 | |
2fd9ae2e | 947 | } else if (startswith(a, "tcp:")) { |
de1c301e | 948 | |
2fd9ae2e LP |
949 | a += 4; |
950 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
951 | if (r < 0) |
952 | return r; | |
de1c301e | 953 | |
2fd9ae2e LP |
954 | break; |
955 | ||
956 | } else if (startswith(a, "unixexec:")) { | |
957 | ||
958 | a += 9; | |
959 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
960 | if (r < 0) |
961 | return r; | |
de1c301e | 962 | |
2fd9ae2e | 963 | break; |
de1c301e | 964 | |
6629161f LP |
965 | } else if (startswith(a, "kernel:")) { |
966 | ||
967 | a += 7; | |
968 | r = parse_kernel_address(b, &a, &guid); | |
969 | if (r < 0) | |
970 | return r; | |
971 | ||
a7893c6b | 972 | break; |
de33fc62 | 973 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 974 | |
146d4773 | 975 | a += 15; |
bc9fd78c LP |
976 | r = parse_container_unix_address(b, &a, &guid); |
977 | if (r < 0) | |
978 | return r; | |
979 | ||
980 | break; | |
de33fc62 | 981 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 982 | |
146d4773 | 983 | a += 17; |
bc9fd78c | 984 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
985 | if (r < 0) |
986 | return r; | |
987 | ||
6629161f | 988 | break; |
de1c301e LP |
989 | } |
990 | ||
2fd9ae2e LP |
991 | a = strchr(a, ';'); |
992 | if (!a) | |
993 | return 0; | |
de1c301e LP |
994 | } |
995 | ||
996 | if (guid) { | |
98178d39 | 997 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
998 | if (r < 0) |
999 | return r; | |
1000 | } | |
1001 | ||
2fd9ae2e | 1002 | b->address_index = a - b->address; |
de1c301e LP |
1003 | return 1; |
1004 | } | |
1005 | ||
a7e3212d | 1006 | static int bus_start_address(sd_bus *b) { |
15442912 DH |
1007 | bool container_kdbus_available = false; |
1008 | bool kdbus_available = false; | |
2fd9ae2e LP |
1009 | int r; |
1010 | ||
1011 | assert(b); | |
1012 | ||
1013 | for (;;) { | |
1e05d493 | 1014 | bool skipped = false; |
2fd9ae2e | 1015 | |
1e05d493 | 1016 | bus_close_fds(b); |
a7e3212d | 1017 | |
15442912 DH |
1018 | /* |
1019 | * Usually, if you provide multiple different bus-addresses, we | |
1020 | * try all of them in order. We use the first one that | |
1021 | * succeeds. However, if you mix kernel and unix addresses, we | |
1022 | * never try unix-addresses if a previous kernel address was | |
1023 | * tried and kdbus was available. This is required to prevent | |
1024 | * clients to fallback to the bus-proxy if kdbus is available | |
1025 | * but failed (eg., too many connections). | |
1026 | */ | |
1027 | ||
1e05d493 | 1028 | if (b->exec_path) |
a7893c6b | 1029 | r = bus_socket_exec(b); |
15442912 | 1030 | else if ((b->nspid > 0 || b->machine) && b->kernel) { |
bc9fd78c | 1031 | r = bus_container_connect_kernel(b); |
15442912 DH |
1032 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1033 | container_kdbus_available = true; | |
751090cc LP |
1034 | |
1035 | } else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1036 | if (!container_kdbus_available) | |
1037 | r = bus_container_connect_socket(b); | |
1038 | else | |
1039 | skipped = true; | |
1040 | ||
1041 | } else if (b->kernel) { | |
a7893c6b | 1042 | r = bus_kernel_connect(b); |
15442912 DH |
1043 | if (r < 0 && !IN_SET(r, -ENOENT, -ESOCKTNOSUPPORT)) |
1044 | kdbus_available = true; | |
751090cc LP |
1045 | |
1046 | } else if (b->sockaddr.sa.sa_family != AF_UNSPEC) { | |
1047 | if (!kdbus_available) | |
1048 | r = bus_socket_connect(b); | |
1049 | else | |
1050 | skipped = true; | |
751090cc | 1051 | } else |
1e05d493 LP |
1052 | skipped = true; |
1053 | ||
1054 | if (!skipped) { | |
1055 | if (r >= 0) { | |
1056 | r = attach_io_events(b); | |
1057 | if (r >= 0) | |
1058 | return r; | |
1059 | } | |
6629161f | 1060 | |
2fd9ae2e LP |
1061 | b->last_connect_error = -r; |
1062 | } | |
1063 | ||
1064 | r = bus_parse_next_address(b); | |
1065 | if (r < 0) | |
1066 | return r; | |
1067 | if (r == 0) | |
1068 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1069 | } |
1070 | } | |
1071 | ||
a7e3212d LP |
1072 | int bus_next_address(sd_bus *b) { |
1073 | assert(b); | |
1074 | ||
1075 | bus_reset_parsed_address(b); | |
1076 | return bus_start_address(b); | |
1077 | } | |
1078 | ||
021a1e78 | 1079 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1080 | struct stat st; |
021a1e78 LP |
1081 | int r; |
1082 | ||
1083 | assert(b); | |
e82c9509 LP |
1084 | assert(b->input_fd >= 0); |
1085 | assert(b->output_fd >= 0); | |
021a1e78 | 1086 | |
e82c9509 | 1087 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1088 | if (r < 0) |
1089 | return r; | |
1090 | ||
e82c9509 | 1091 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1092 | if (r < 0) |
1093 | return r; | |
1094 | ||
e82c9509 LP |
1095 | if (b->input_fd != b->output_fd) { |
1096 | r = fd_nonblock(b->output_fd, true); | |
1097 | if (r < 0) | |
1098 | return r; | |
1099 | ||
1100 | r = fd_cloexec(b->output_fd, true); | |
1101 | if (r < 0) | |
1102 | return r; | |
1103 | } | |
1104 | ||
6629161f LP |
1105 | if (fstat(b->input_fd, &st) < 0) |
1106 | return -errno; | |
1107 | ||
1108 | if (S_ISCHR(b->input_fd)) | |
1109 | return bus_kernel_take_fd(b); | |
1110 | else | |
1111 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1112 | } |
1113 | ||
d9f644e2 | 1114 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1115 | int r; |
1116 | ||
d6888822 LP |
1117 | assert_return(bus, -EINVAL); |
1118 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1119 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1120 | |
1121 | bus->state = BUS_OPENING; | |
1122 | ||
2181a7f5 LP |
1123 | if (bus->is_server && bus->bus_client) |
1124 | return -EINVAL; | |
1125 | ||
e82c9509 | 1126 | if (bus->input_fd >= 0) |
021a1e78 | 1127 | r = bus_start_fd(bus); |
a7893c6b | 1128 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1129 | r = bus_start_address(bus); |
021a1e78 LP |
1130 | else |
1131 | return -EINVAL; | |
1132 | ||
db9bb83f LP |
1133 | if (r < 0) { |
1134 | sd_bus_close(bus); | |
021a1e78 | 1135 | return r; |
db9bb83f | 1136 | } |
021a1e78 LP |
1137 | |
1138 | return bus_send_hello(bus); | |
1139 | } | |
1140 | ||
af08d2f9 LP |
1141 | _public_ int sd_bus_open(sd_bus **ret) { |
1142 | const char *e; | |
1143 | sd_bus *b; | |
1144 | int r; | |
1145 | ||
1146 | assert_return(ret, -EINVAL); | |
1147 | ||
1148 | /* Let's connect to the starter bus if it is set, and | |
1149 | * otherwise to the bus that is appropropriate for the scope | |
1150 | * we are running in */ | |
1151 | ||
1152 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1153 | if (e) { | |
1154 | if (streq(e, "system")) | |
1155 | return sd_bus_open_system(ret); | |
09365592 | 1156 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1157 | return sd_bus_open_user(ret); |
1158 | } | |
1159 | ||
1160 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1161 | if (!e) { | |
1162 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1163 | return sd_bus_open_user(ret); | |
1164 | else | |
1165 | return sd_bus_open_system(ret); | |
1166 | } | |
1167 | ||
1168 | r = sd_bus_new(&b); | |
1169 | if (r < 0) | |
1170 | return r; | |
1171 | ||
1172 | r = sd_bus_set_address(b, e); | |
1173 | if (r < 0) | |
1174 | goto fail; | |
1175 | ||
1176 | b->bus_client = true; | |
1177 | ||
1178 | /* We don't know whether the bus is trusted or not, so better | |
1179 | * be safe, and authenticate everything */ | |
1180 | b->trusted = false; | |
cf226cfc LP |
1181 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1182 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1183 | |
1184 | r = sd_bus_start(b); | |
1185 | if (r < 0) | |
1186 | goto fail; | |
1187 | ||
1188 | *ret = b; | |
1189 | return 0; | |
1190 | ||
1191 | fail: | |
1192 | bus_free(b); | |
1193 | return r; | |
1194 | } | |
1195 | ||
09365592 | 1196 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1197 | const char *e; |
09365592 LP |
1198 | assert(b); |
1199 | ||
1200 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1201 | if (e) | |
1202 | return sd_bus_set_address(b, e); | |
1203 | ||
057171ef | 1204 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1205 | } |
1206 | ||
1207 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1208 | sd_bus *b; |
1209 | int r; | |
1210 | ||
d6888822 | 1211 | assert_return(ret, -EINVAL); |
de1c301e | 1212 | |
021a1e78 LP |
1213 | r = sd_bus_new(&b); |
1214 | if (r < 0) | |
1215 | return r; | |
1216 | ||
09365592 | 1217 | r = bus_set_address_system(b); |
e3dd987c LP |
1218 | if (r < 0) |
1219 | goto fail; | |
de1c301e | 1220 | |
94bbf1ba | 1221 | b->bus_client = true; |
5972fe95 | 1222 | b->is_system = true; |
021a1e78 | 1223 | |
adacb957 LP |
1224 | /* Let's do per-method access control on the system bus. We |
1225 | * need the caller's UID and capability set for that. */ | |
1226 | b->trusted = false; | |
1227 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1228 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1229 | |
021a1e78 LP |
1230 | r = sd_bus_start(b); |
1231 | if (r < 0) | |
1232 | goto fail; | |
de1c301e LP |
1233 | |
1234 | *ret = b; | |
1235 | return 0; | |
021a1e78 LP |
1236 | |
1237 | fail: | |
1238 | bus_free(b); | |
1239 | return r; | |
de1c301e LP |
1240 | } |
1241 | ||
09365592 | 1242 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1243 | const char *e; |
64ce4ad7 DH |
1244 | uid_t uid; |
1245 | int r; | |
de1c301e | 1246 | |
09365592 | 1247 | assert(b); |
021a1e78 | 1248 | |
6c03089c | 1249 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1250 | if (e) |
1251 | return sd_bus_set_address(b, e); | |
1252 | ||
64ce4ad7 DH |
1253 | r = cg_pid_get_owner_uid(0, &uid); |
1254 | if (r < 0) | |
1255 | uid = getuid(); | |
1256 | ||
09365592 | 1257 | e = secure_getenv("XDG_RUNTIME_DIR"); |
057171ef | 1258 | if (e) { |
09365592 | 1259 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1260 | |
09365592 LP |
1261 | ee = bus_address_escape(e); |
1262 | if (!ee) | |
1263 | return -ENOMEM; | |
e3dd987c | 1264 | |
64ce4ad7 | 1265 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, uid, ee); |
057171ef | 1266 | } else |
64ce4ad7 | 1267 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, uid); |
de1c301e | 1268 | |
09365592 LP |
1269 | if (!b->address) |
1270 | return -ENOMEM; | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1276 | sd_bus *b; | |
1277 | int r; | |
1278 | ||
1279 | assert_return(ret, -EINVAL); | |
1280 | ||
1281 | r = sd_bus_new(&b); | |
1282 | if (r < 0) | |
1283 | return r; | |
1284 | ||
1285 | r = bus_set_address_user(b); | |
1286 | if (r < 0) | |
1287 | return r; | |
1288 | ||
94bbf1ba | 1289 | b->bus_client = true; |
5972fe95 | 1290 | b->is_user = true; |
de1c301e | 1291 | |
adacb957 LP |
1292 | /* We don't do any per-method access control on the user |
1293 | * bus. */ | |
1294 | b->trusted = true; | |
1295 | ||
021a1e78 | 1296 | r = sd_bus_start(b); |
2571ead1 LP |
1297 | if (r < 0) |
1298 | goto fail; | |
de1c301e LP |
1299 | |
1300 | *ret = b; | |
1301 | return 0; | |
2571ead1 LP |
1302 | |
1303 | fail: | |
021a1e78 | 1304 | bus_free(b); |
2571ead1 | 1305 | return r; |
de1c301e LP |
1306 | } |
1307 | ||
09365592 | 1308 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1309 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1310 | char *m = NULL, *c = NULL; |
0f8bd8de | 1311 | |
09365592 LP |
1312 | assert(b); |
1313 | assert(host); | |
0f8bd8de | 1314 | |
7f0d207d LP |
1315 | /* Let's see if we shall enter some container */ |
1316 | m = strchr(host, ':'); | |
1317 | if (m) { | |
1318 | m++; | |
1319 | ||
1320 | /* Let's make sure this is not a port of some kind, | |
1321 | * and is a valid machine name. */ | |
1322 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1323 | char *t; | |
1324 | ||
1325 | /* Cut out the host part */ | |
1326 | t = strndupa(host, m - host - 1); | |
1327 | e = bus_address_escape(t); | |
1328 | if (!e) | |
1329 | return -ENOMEM; | |
1330 | ||
63c372cb | 1331 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1332 | } |
1333 | } | |
1334 | ||
1335 | if (!e) { | |
1336 | e = bus_address_escape(host); | |
1337 | if (!e) | |
1338 | return -ENOMEM; | |
1339 | } | |
0f8bd8de | 1340 | |
7f0d207d | 1341 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1342 | if (!b->address) |
0f8bd8de | 1343 | return -ENOMEM; |
a7893c6b | 1344 | |
09365592 LP |
1345 | return 0; |
1346 | } | |
1347 | ||
1348 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1349 | sd_bus *bus; | |
1350 | int r; | |
1351 | ||
1352 | assert_return(host, -EINVAL); | |
1353 | assert_return(ret, -EINVAL); | |
1354 | ||
a7893c6b | 1355 | r = sd_bus_new(&bus); |
09365592 | 1356 | if (r < 0) |
a7893c6b | 1357 | return r; |
a7893c6b | 1358 | |
09365592 LP |
1359 | r = bus_set_address_system_remote(bus, host); |
1360 | if (r < 0) | |
1361 | goto fail; | |
1362 | ||
a7893c6b | 1363 | bus->bus_client = true; |
09365592 | 1364 | bus->trusted = false; |
3acc1daf | 1365 | bus->is_system = true; |
a7893c6b LP |
1366 | |
1367 | r = sd_bus_start(bus); | |
09365592 LP |
1368 | if (r < 0) |
1369 | goto fail; | |
a7893c6b LP |
1370 | |
1371 | *ret = bus; | |
1372 | return 0; | |
09365592 LP |
1373 | |
1374 | fail: | |
1375 | bus_free(bus); | |
1376 | return r; | |
a7893c6b LP |
1377 | } |
1378 | ||
de33fc62 | 1379 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1380 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1381 | |
09365592 LP |
1382 | assert(b); |
1383 | assert(machine); | |
a7893c6b LP |
1384 | |
1385 | e = bus_address_escape(machine); | |
1386 | if (!e) | |
1387 | return -ENOMEM; | |
1388 | ||
de33fc62 | 1389 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
09365592 | 1390 | if (!b->address) |
a7893c6b | 1391 | return -ENOMEM; |
0f8bd8de | 1392 | |
09365592 LP |
1393 | return 0; |
1394 | } | |
1395 | ||
de33fc62 | 1396 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1397 | sd_bus *bus; |
1398 | int r; | |
1399 | ||
1400 | assert_return(machine, -EINVAL); | |
1401 | assert_return(ret, -EINVAL); | |
affcf189 | 1402 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1403 | |
0f8bd8de | 1404 | r = sd_bus_new(&bus); |
09365592 | 1405 | if (r < 0) |
0f8bd8de | 1406 | return r; |
0f8bd8de | 1407 | |
de33fc62 | 1408 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1409 | if (r < 0) |
1410 | goto fail; | |
1411 | ||
0f8bd8de | 1412 | bus->bus_client = true; |
09365592 | 1413 | bus->trusted = false; |
3acc1daf | 1414 | bus->is_system = true; |
0f8bd8de LP |
1415 | |
1416 | r = sd_bus_start(bus); | |
09365592 LP |
1417 | if (r < 0) |
1418 | goto fail; | |
0f8bd8de LP |
1419 | |
1420 | *ret = bus; | |
1421 | return 0; | |
09365592 LP |
1422 | |
1423 | fail: | |
1424 | bus_free(bus); | |
1425 | return r; | |
0f8bd8de LP |
1426 | } |
1427 | ||
d9f644e2 | 1428 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1429 | |
de1c301e LP |
1430 | if (!bus) |
1431 | return; | |
d5a2b9a6 LP |
1432 | if (bus->state == BUS_CLOSED) |
1433 | return; | |
1434 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1435 | return; |
1436 | ||
1437 | bus->state = BUS_CLOSED; | |
e82c9509 | 1438 | |
40ca29a1 LP |
1439 | sd_bus_detach_event(bus); |
1440 | ||
0e586eae LP |
1441 | /* Drop all queued messages so that they drop references to |
1442 | * the bus object and the bus may be freed */ | |
1443 | bus_reset_queues(bus); | |
1444 | ||
f54514f3 LP |
1445 | if (!bus->is_kernel) |
1446 | bus_close_fds(bus); | |
1447 | ||
1448 | /* We'll leave the fd open in case this is a kernel bus, since | |
1449 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1450 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1451 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1452 | } |
1453 | ||
03976f7b LP |
1454 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1455 | ||
1456 | if (!bus) | |
1457 | return NULL; | |
1458 | ||
1459 | sd_bus_flush(bus); | |
1460 | sd_bus_close(bus); | |
1461 | ||
1462 | return sd_bus_unref(bus); | |
1463 | } | |
1464 | ||
718db961 LP |
1465 | static void bus_enter_closing(sd_bus *bus) { |
1466 | assert(bus); | |
1467 | ||
1468 | if (bus->state != BUS_OPENING && | |
1469 | bus->state != BUS_AUTHENTICATING && | |
1470 | bus->state != BUS_HELLO && | |
1471 | bus->state != BUS_RUNNING) | |
1472 | return; | |
1473 | ||
1474 | bus->state = BUS_CLOSING; | |
1475 | } | |
1476 | ||
d9f644e2 | 1477 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1478 | assert_return(bus, NULL); |
de1c301e | 1479 | |
e4ee6e5c | 1480 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1481 | |
de1c301e LP |
1482 | return bus; |
1483 | } | |
1484 | ||
d9f644e2 | 1485 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1486 | unsigned i; |
5b1bc83f LP |
1487 | |
1488 | if (!bus) | |
1489 | return NULL; | |
de1c301e | 1490 | |
f389bf15 LP |
1491 | i = REFCNT_DEC(bus->n_ref); |
1492 | if (i > 0) | |
1493 | return NULL; | |
1494 | ||
1495 | bus_free(bus); | |
de1c301e LP |
1496 | return NULL; |
1497 | } | |
1498 | ||
d9f644e2 | 1499 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1500 | |
1501 | assert_return(bus, -EINVAL); | |
1502 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1503 | |
f54514f3 | 1504 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1505 | } |
1506 | ||
d9f644e2 | 1507 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1508 | int r; |
1509 | ||
d6888822 LP |
1510 | assert_return(bus, -EINVAL); |
1511 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1512 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1513 | |
09365592 LP |
1514 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1515 | return 0; | |
1516 | ||
d728d708 | 1517 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1518 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1519 | return 0; |
1520 | ||
20902f3e | 1521 | r = bus_ensure_running(bus); |
d728d708 LP |
1522 | if (r < 0) |
1523 | return r; | |
de1c301e | 1524 | |
d728d708 LP |
1525 | return bus->can_fds; |
1526 | } | |
1527 | ||
1528 | return bus_type_is_valid(type); | |
de1c301e LP |
1529 | } |
1530 | ||
5c302692 | 1531 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1532 | int r; |
de1c301e | 1533 | |
d6888822 | 1534 | assert_return(bus, -EINVAL); |
f7fce345 | 1535 | assert_return(id, -EINVAL); |
d6888822 | 1536 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1537 | |
20902f3e | 1538 | r = bus_ensure_running(bus); |
d728d708 LP |
1539 | if (r < 0) |
1540 | return r; | |
de1c301e | 1541 | |
f7fce345 | 1542 | *id = bus->server_id; |
d728d708 | 1543 | return 0; |
de1c301e LP |
1544 | } |
1545 | ||
3df7a7e6 | 1546 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1547 | assert(b); |
de1c301e LP |
1548 | assert(m); |
1549 | ||
aea93deb LP |
1550 | if (m->sealed) { |
1551 | /* If we copy the same message to multiple | |
693eb9a2 | 1552 | * destinations, avoid using the same cookie |
aea93deb | 1553 | * numbers. */ |
693eb9a2 | 1554 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1555 | return 0; |
aea93deb | 1556 | } |
de1c301e | 1557 | |
3df7a7e6 LP |
1558 | if (timeout == 0) |
1559 | timeout = BUS_DEFAULT_TIMEOUT; | |
1560 | ||
693eb9a2 | 1561 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1562 | } |
1563 | ||
e1c433c6 | 1564 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1565 | bool remarshal = false; |
1566 | ||
e1c433c6 LP |
1567 | assert(b); |
1568 | ||
908b8a42 DH |
1569 | /* wrong packet version */ |
1570 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1571 | remarshal = true; | |
1572 | ||
1573 | /* wrong packet endianness */ | |
1574 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1575 | remarshal = true; | |
1576 | ||
1577 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1578 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1579 | * force remarshaling of the message. Technically, we could just | |
1580 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1581 | * the message refer to m->kdbus already. This should be fixed! */ | |
1582 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1583 | remarshal = true; | |
e1c433c6 | 1584 | |
908b8a42 | 1585 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1586 | } |
1587 | ||
7adc46fc LP |
1588 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1589 | assert(b); | |
1590 | assert(m); | |
1591 | ||
52cd5877 LP |
1592 | /* Fake some timestamps, if they were requested, and not |
1593 | * already initialized */ | |
1594 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1595 | if (m->realtime <= 0) | |
1596 | m->realtime = now(CLOCK_REALTIME); | |
1597 | ||
1598 | if (m->monotonic <= 0) | |
1599 | m->monotonic = now(CLOCK_MONOTONIC); | |
1600 | } | |
1601 | ||
7adc46fc LP |
1602 | /* The bus specification says the serial number cannot be 0, |
1603 | * hence let's fill something in for synthetic messages. Since | |
1604 | * synthetic messages might have a fake sender and we don't | |
1605 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1606 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1607 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1608 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1609 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1610 | } |
1611 | ||
069f5e61 | 1612 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1613 | int r; |
1614 | ||
718db961 | 1615 | assert(bus); |
2e3db52d | 1616 | assert(m); |
718db961 LP |
1617 | |
1618 | if (bus->is_kernel) | |
069f5e61 | 1619 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1620 | else |
2e3db52d LP |
1621 | r = bus_socket_write_message(bus, m, idx); |
1622 | ||
1623 | if (r <= 0) | |
1624 | return r; | |
1625 | ||
90911bb6 | 1626 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1627 | 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 |
1628 | bus_message_type_to_string(m->header->type), |
1629 | strna(sd_bus_message_get_sender(m)), | |
1630 | strna(sd_bus_message_get_destination(m)), | |
1631 | strna(sd_bus_message_get_path(m)), | |
1632 | strna(sd_bus_message_get_interface(m)), | |
1633 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1634 | BUS_MESSAGE_COOKIE(m), |
1635 | m->reply_cookie, | |
2e3db52d LP |
1636 | strna(m->error.message)); |
1637 | ||
1638 | return r; | |
718db961 LP |
1639 | } |
1640 | ||
de1c301e | 1641 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1642 | int r, ret = 0; |
de1c301e LP |
1643 | |
1644 | assert(bus); | |
89ffcd2a | 1645 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1646 | |
de1c301e LP |
1647 | while (bus->wqueue_size > 0) { |
1648 | ||
069f5e61 | 1649 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1650 | if (r < 0) |
de1c301e | 1651 | return r; |
718db961 | 1652 | else if (r == 0) |
e3017af9 LP |
1653 | /* Didn't do anything this time */ |
1654 | return ret; | |
6629161f | 1655 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1656 | /* Fully written. Let's drop the entry from |
1657 | * the queue. | |
1658 | * | |
1659 | * This isn't particularly optimized, but | |
1660 | * well, this is supposed to be our worst-case | |
1661 | * buffer only, and the socket buffer is | |
1662 | * supposed to be our primary buffer, and if | |
1663 | * it got full, then all bets are off | |
1664 | * anyway. */ | |
1665 | ||
de1c301e | 1666 | bus->wqueue_size --; |
c4e6e242 | 1667 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1668 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1669 | bus->windex = 0; | |
1670 | ||
e3017af9 | 1671 | ret = 1; |
de1c301e LP |
1672 | } |
1673 | } | |
1674 | ||
e3017af9 | 1675 | return ret; |
de1c301e LP |
1676 | } |
1677 | ||
766c5809 | 1678 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1679 | assert(bus); |
1680 | ||
1681 | if (bus->is_kernel) | |
766c5809 | 1682 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1683 | else |
1684 | return bus_socket_read_message(bus); | |
1685 | } | |
1686 | ||
7adc46fc | 1687 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1688 | assert(bus); |
7d22c717 | 1689 | |
821e0756 | 1690 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1691 | return -ENOBUFS; |
1692 | ||
821e0756 | 1693 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1694 | return -ENOMEM; |
1695 | ||
7d22c717 LP |
1696 | return 0; |
1697 | } | |
1698 | ||
766c5809 | 1699 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1700 | int r, ret = 0; |
de1c301e LP |
1701 | |
1702 | assert(bus); | |
1703 | assert(m); | |
89ffcd2a | 1704 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1705 | |
766c5809 LP |
1706 | /* Note that the priority logic is only available on kdbus, |
1707 | * where the rqueue is unused. We check the rqueue here | |
1708 | * anyway, because it's simple... */ | |
1709 | ||
7d22c717 LP |
1710 | for (;;) { |
1711 | if (bus->rqueue_size > 0) { | |
1712 | /* Dispatch a queued message */ | |
de1c301e | 1713 | |
7d22c717 LP |
1714 | *m = bus->rqueue[0]; |
1715 | bus->rqueue_size --; | |
1716 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1717 | return 1; | |
1718 | } | |
de1c301e | 1719 | |
7d22c717 | 1720 | /* Try to read a new message */ |
766c5809 | 1721 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1722 | if (r < 0) |
e3017af9 | 1723 | return r; |
e3017af9 LP |
1724 | if (r == 0) |
1725 | return ret; | |
de1c301e | 1726 | |
2e8d788c | 1727 | ret = 1; |
7d22c717 | 1728 | } |
de1c301e LP |
1729 | } |
1730 | ||
069f5e61 | 1731 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1732 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1733 | int r; |
1734 | ||
d6888822 | 1735 | assert_return(m, -EINVAL); |
9030ca46 LP |
1736 | |
1737 | if (!bus) | |
1738 | bus = m->bus; | |
1739 | ||
d6888822 | 1740 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1741 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1742 | |
a3d59cd1 LP |
1743 | if (!BUS_IS_OPEN(bus->state)) |
1744 | return -ENOTCONN; | |
1745 | ||
021a1e78 LP |
1746 | if (m->n_fds > 0) { |
1747 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1748 | if (r < 0) | |
1749 | return r; | |
1750 | if (r == 0) | |
15411c0c | 1751 | return -EOPNOTSUPP; |
021a1e78 | 1752 | } |
de1c301e | 1753 | |
693eb9a2 | 1754 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1755 | * is expected */ |
693eb9a2 | 1756 | if (!cookie && !m->sealed) |
0461f8cd | 1757 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1758 | |
3df7a7e6 | 1759 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1760 | if (r < 0) |
1761 | return r; | |
1762 | ||
441d56a1 | 1763 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1764 | * message and place a replacement in m */ |
1765 | r = bus_remarshal_message(bus, &m); | |
1766 | if (r < 0) | |
1767 | return r; | |
1768 | ||
5407f2de LP |
1769 | /* If this is a reply and no reply was requested, then let's |
1770 | * suppress this, if we can */ | |
997eadb5 LP |
1771 | if (m->dont_send) |
1772 | goto finish; | |
5407f2de | 1773 | |
89ffcd2a | 1774 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1775 | size_t idx = 0; |
1776 | ||
069f5e61 | 1777 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1778 | if (r < 0) { |
441d56a1 | 1779 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1780 | bus_enter_closing(bus); |
441d56a1 LP |
1781 | return -ECONNRESET; |
1782 | } | |
32f46480 | 1783 | |
de1c301e | 1784 | return r; |
997eadb5 LP |
1785 | } |
1786 | ||
1787 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1788 | /* Wasn't fully written. So let's remember how |
1789 | * much was written. Note that the first entry | |
1790 | * of the wqueue array is always allocated so | |
1791 | * that we always can remember how much was | |
1792 | * written. */ | |
1793 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1794 | bus->wqueue_size = 1; | |
1795 | bus->windex = idx; | |
1796 | } | |
997eadb5 | 1797 | |
de1c301e | 1798 | } else { |
de1c301e LP |
1799 | /* Just append it to the queue. */ |
1800 | ||
25220239 | 1801 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1802 | return -ENOBUFS; |
1803 | ||
821e0756 | 1804 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1805 | return -ENOMEM; |
1806 | ||
821e0756 | 1807 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1808 | } |
1809 | ||
997eadb5 | 1810 | finish: |
693eb9a2 LP |
1811 | if (cookie) |
1812 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1813 | |
7a37d625 | 1814 | return 1; |
de1c301e LP |
1815 | } |
1816 | ||
069f5e61 LP |
1817 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1818 | return bus_send_internal(bus, m, cookie, false); | |
1819 | } | |
1820 | ||
693eb9a2 | 1821 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1822 | int r; |
1823 | ||
911121a7 | 1824 | assert_return(m, -EINVAL); |
9030ca46 LP |
1825 | |
1826 | if (!bus) | |
1827 | bus = m->bus; | |
1828 | ||
911121a7 LP |
1829 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1830 | ||
a3d59cd1 LP |
1831 | if (!BUS_IS_OPEN(bus->state)) |
1832 | return -ENOTCONN; | |
1833 | ||
911121a7 LP |
1834 | if (!streq_ptr(m->destination, destination)) { |
1835 | ||
1836 | if (!destination) | |
1837 | return -EEXIST; | |
1838 | ||
1839 | r = sd_bus_message_set_destination(m, destination); | |
1840 | if (r < 0) | |
1841 | return r; | |
1842 | } | |
1843 | ||
693eb9a2 | 1844 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1845 | } |
1846 | ||
de1c301e LP |
1847 | static usec_t calc_elapse(uint64_t usec) { |
1848 | if (usec == (uint64_t) -1) | |
1849 | return 0; | |
1850 | ||
de1c301e LP |
1851 | return now(CLOCK_MONOTONIC) + usec; |
1852 | } | |
1853 | ||
e3017af9 LP |
1854 | static int timeout_compare(const void *a, const void *b) { |
1855 | const struct reply_callback *x = a, *y = b; | |
1856 | ||
1857 | if (x->timeout != 0 && y->timeout == 0) | |
1858 | return -1; | |
1859 | ||
1860 | if (x->timeout == 0 && y->timeout != 0) | |
1861 | return 1; | |
1862 | ||
1863 | if (x->timeout < y->timeout) | |
1864 | return -1; | |
1865 | ||
1866 | if (x->timeout > y->timeout) | |
1867 | return 1; | |
1868 | ||
1869 | return 0; | |
1870 | } | |
1871 | ||
c49b30a2 | 1872 | _public_ int sd_bus_call_async( |
de1c301e | 1873 | sd_bus *bus, |
19befb2d | 1874 | sd_bus_slot **slot, |
e1c433c6 | 1875 | sd_bus_message *_m, |
52f3ba91 | 1876 | sd_bus_message_handler_t callback, |
de1c301e | 1877 | void *userdata, |
19befb2d | 1878 | uint64_t usec) { |
de1c301e | 1879 | |
e1c433c6 | 1880 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1881 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1882 | int r; |
1883 | ||
d6888822 | 1884 | assert_return(m, -EINVAL); |
40ca29a1 | 1885 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1886 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1887 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1888 | |
1889 | if (!bus) | |
1890 | bus = m->bus; | |
1891 | ||
d6888822 | 1892 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1893 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1894 | |
a3d59cd1 LP |
1895 | if (!BUS_IS_OPEN(bus->state)) |
1896 | return -ENOTCONN; | |
1897 | ||
c9fe4af7 | 1898 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1899 | if (r < 0) |
1900 | return r; | |
de1c301e | 1901 | |
3df7a7e6 LP |
1902 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1903 | if (r < 0) | |
1904 | return r; | |
e3017af9 | 1905 | |
3df7a7e6 | 1906 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1907 | if (r < 0) |
1908 | return r; | |
1909 | ||
e1c433c6 LP |
1910 | r = bus_remarshal_message(bus, &m); |
1911 | if (r < 0) | |
1912 | return r; | |
1913 | ||
19befb2d LP |
1914 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1915 | if (!s) | |
de1c301e LP |
1916 | return -ENOMEM; |
1917 | ||
19befb2d | 1918 | s->reply_callback.callback = callback; |
de1c301e | 1919 | |
19befb2d | 1920 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1921 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1922 | if (r < 0) { |
19befb2d | 1923 | s->reply_callback.cookie = 0; |
de1c301e LP |
1924 | return r; |
1925 | } | |
1926 | ||
19befb2d LP |
1927 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1928 | if (s->reply_callback.timeout != 0) { | |
1929 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1930 | if (r < 0) { |
19befb2d | 1931 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1932 | return r; |
1933 | } | |
1934 | } | |
1935 | ||
19befb2d LP |
1936 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1937 | if (r < 0) | |
de1c301e | 1938 | return r; |
de1c301e | 1939 | |
19befb2d LP |
1940 | if (slot) |
1941 | *slot = s; | |
1942 | s = NULL; | |
e3017af9 | 1943 | |
19befb2d | 1944 | return r; |
de1c301e LP |
1945 | } |
1946 | ||
20902f3e | 1947 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1948 | int r; |
1949 | ||
1950 | assert(bus); | |
1951 | ||
718db961 | 1952 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1953 | return -ENOTCONN; |
d728d708 LP |
1954 | if (bus->state == BUS_RUNNING) |
1955 | return 1; | |
89ffcd2a LP |
1956 | |
1957 | for (;;) { | |
1958 | r = sd_bus_process(bus, NULL); | |
1959 | if (r < 0) | |
1960 | return r; | |
d728d708 LP |
1961 | if (bus->state == BUS_RUNNING) |
1962 | return 1; | |
e3017af9 LP |
1963 | if (r > 0) |
1964 | continue; | |
89ffcd2a LP |
1965 | |
1966 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1967 | if (r < 0) | |
1968 | return r; | |
1969 | } | |
1970 | } | |
1971 | ||
97f82db3 | 1972 | _public_ int sd_bus_call( |
de1c301e | 1973 | sd_bus *bus, |
97f82db3 | 1974 | sd_bus_message *_m, |
de1c301e LP |
1975 | uint64_t usec, |
1976 | sd_bus_error *error, | |
1977 | sd_bus_message **reply) { | |
1978 | ||
97f82db3 | 1979 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1980 | usec_t timeout; |
693eb9a2 | 1981 | uint64_t cookie; |
7d22c717 LP |
1982 | unsigned i; |
1983 | int r; | |
de1c301e | 1984 | |
759e02e7 LP |
1985 | bus_assert_return(m, -EINVAL, error); |
1986 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
1987 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
1988 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
1989 | |
1990 | if (!bus) | |
1991 | bus = m->bus; | |
1992 | ||
759e02e7 LP |
1993 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
1994 | bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error); | |
97f82db3 | 1995 | |
759e02e7 LP |
1996 | if (!BUS_IS_OPEN(bus->state)) { |
1997 | r = -ENOTCONN; | |
1998 | goto fail; | |
1999 | } | |
a3d59cd1 | 2000 | |
97f82db3 KS |
2001 | r = bus_ensure_running(bus); |
2002 | if (r < 0) | |
759e02e7 | 2003 | goto fail; |
97f82db3 | 2004 | |
a43b9ca3 | 2005 | i = bus->rqueue_size; |
97f82db3 KS |
2006 | |
2007 | r = bus_seal_message(bus, m, usec); | |
2008 | if (r < 0) | |
759e02e7 | 2009 | goto fail; |
97f82db3 KS |
2010 | |
2011 | r = bus_remarshal_message(bus, &m); | |
2012 | if (r < 0) | |
759e02e7 | 2013 | goto fail; |
97f82db3 | 2014 | |
069f5e61 | 2015 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e | 2016 | if (r < 0) |
759e02e7 | 2017 | goto fail; |
de1c301e | 2018 | |
3df7a7e6 | 2019 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
2020 | |
2021 | for (;;) { | |
2022 | usec_t left; | |
de1c301e | 2023 | |
7d22c717 LP |
2024 | while (i < bus->rqueue_size) { |
2025 | sd_bus_message *incoming = NULL; | |
2026 | ||
2027 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2028 | |
693eb9a2 | 2029 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2030 | /* Found a match! */ |
2031 | ||
7d22c717 LP |
2032 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2033 | bus->rqueue_size--; | |
f9f97ca6 | 2034 | log_debug_bus_message(incoming); |
7d22c717 | 2035 | |
40ca29a1 | 2036 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2037 | |
2ce97e2b LP |
2038 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2039 | if (reply) | |
2040 | *reply = incoming; | |
2041 | else | |
2042 | sd_bus_message_unref(incoming); | |
2043 | ||
2044 | return 1; | |
2045 | } | |
2046 | ||
2047 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2048 | sd_bus_message_unref(incoming); |
2049 | return r; | |
b7f247e0 | 2050 | |
759e02e7 | 2051 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2052 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2053 | sd_bus_message_unref(incoming); |
2054 | return r; | |
2055 | } else { | |
a43b9ca3 | 2056 | r = -EIO; |
759e02e7 LP |
2057 | goto fail; |
2058 | } | |
a8a07f89 | 2059 | |
693eb9a2 | 2060 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2061 | bus->unique_name && |
2062 | incoming->sender && | |
2063 | streq(bus->unique_name, incoming->sender)) { | |
2064 | ||
7d22c717 LP |
2065 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2066 | bus->rqueue_size--; | |
2067 | ||
a8a07f89 LP |
2068 | /* Our own message? Somebody is trying |
2069 | * to send its own client a message, | |
2070 | * let's not dead-lock, let's fail | |
2071 | * immediately. */ | |
2072 | ||
2073 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2074 | r = -ELOOP; |
2075 | goto fail; | |
de1c301e LP |
2076 | } |
2077 | ||
de1c301e | 2078 | /* Try to read more, right-away */ |
7d22c717 | 2079 | i++; |
de1c301e | 2080 | } |
7d22c717 | 2081 | |
766c5809 | 2082 | r = bus_read_message(bus, false, 0); |
32f46480 | 2083 | if (r < 0) { |
441d56a1 | 2084 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2085 | bus_enter_closing(bus); |
759e02e7 | 2086 | r = -ECONNRESET; |
441d56a1 | 2087 | } |
32f46480 | 2088 | |
759e02e7 | 2089 | goto fail; |
32f46480 | 2090 | } |
7d22c717 | 2091 | if (r > 0) |
e3017af9 | 2092 | continue; |
de1c301e LP |
2093 | |
2094 | if (timeout > 0) { | |
2095 | usec_t n; | |
2096 | ||
2097 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2098 | if (n >= timeout) { |
2099 | r = -ETIMEDOUT; | |
2100 | goto fail; | |
2101 | } | |
de1c301e LP |
2102 | |
2103 | left = timeout - n; | |
2104 | } else | |
2105 | left = (uint64_t) -1; | |
2106 | ||
e3017af9 | 2107 | r = bus_poll(bus, true, left); |
de1c301e | 2108 | if (r < 0) |
759e02e7 LP |
2109 | goto fail; |
2110 | if (r == 0) { | |
2111 | r = -ETIMEDOUT; | |
2112 | goto fail; | |
2113 | } | |
de1c301e LP |
2114 | |
2115 | r = dispatch_wqueue(bus); | |
32f46480 | 2116 | if (r < 0) { |
441d56a1 | 2117 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2118 | bus_enter_closing(bus); |
759e02e7 | 2119 | r = -ECONNRESET; |
441d56a1 | 2120 | } |
32f46480 | 2121 | |
759e02e7 | 2122 | goto fail; |
32f46480 | 2123 | } |
de1c301e | 2124 | } |
759e02e7 LP |
2125 | |
2126 | fail: | |
2127 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2128 | } |
2129 | ||
d9f644e2 | 2130 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2131 | |
2132 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2133 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2134 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2135 | |
e82c9509 | 2136 | return bus->input_fd; |
de1c301e LP |
2137 | } |
2138 | ||
d9f644e2 | 2139 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2140 | int flags = 0; |
2141 | ||
d6888822 | 2142 | assert_return(bus, -EINVAL); |
d6888822 | 2143 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2144 | |
a3d59cd1 LP |
2145 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2146 | return -ENOTCONN; | |
2147 | ||
de1c301e LP |
2148 | if (bus->state == BUS_OPENING) |
2149 | flags |= POLLOUT; | |
89ffcd2a LP |
2150 | else if (bus->state == BUS_AUTHENTICATING) { |
2151 | ||
2181a7f5 | 2152 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2153 | flags |= POLLOUT; |
2154 | ||
2155 | flags |= POLLIN; | |
2156 | ||
2157 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2158 | if (bus->rqueue_size <= 0) |
2159 | flags |= POLLIN; | |
2160 | if (bus->wqueue_size > 0) | |
2161 | flags |= POLLOUT; | |
2162 | } | |
2163 | ||
2164 | return flags; | |
2165 | } | |
2166 | ||
d9f644e2 | 2167 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2168 | struct reply_callback *c; |
2169 | ||
d6888822 LP |
2170 | assert_return(bus, -EINVAL); |
2171 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2172 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2173 | |
a3d59cd1 LP |
2174 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2175 | return -ENOTCONN; | |
2176 | ||
8f8f05a9 LP |
2177 | if (bus->track_queue) { |
2178 | *timeout_usec = 0; | |
2179 | return 1; | |
2180 | } | |
2181 | ||
718db961 LP |
2182 | if (bus->state == BUS_CLOSING) { |
2183 | *timeout_usec = 0; | |
2184 | return 1; | |
2185 | } | |
2186 | ||
e3017af9 LP |
2187 | if (bus->state == BUS_AUTHENTICATING) { |
2188 | *timeout_usec = bus->auth_timeout; | |
2189 | return 1; | |
2190 | } | |
2191 | ||
adee69fa LP |
2192 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2193 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2194 | return 0; |
adee69fa | 2195 | } |
e3017af9 | 2196 | |
8efd6381 LP |
2197 | if (bus->rqueue_size > 0) { |
2198 | *timeout_usec = 0; | |
2199 | return 1; | |
2200 | } | |
2201 | ||
e3017af9 | 2202 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2203 | if (!c) { |
2204 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2205 | return 0; |
adee69fa | 2206 | } |
e3017af9 | 2207 | |
19befb2d LP |
2208 | if (c->timeout == 0) { |
2209 | *timeout_usec = (uint64_t) -1; | |
2210 | return 0; | |
2211 | } | |
2212 | ||
e3017af9 LP |
2213 | *timeout_usec = c->timeout; |
2214 | return 1; | |
2215 | } | |
2216 | ||
2217 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2218 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2219 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2220 | struct reply_callback *c; |
1b64f838 | 2221 | sd_bus_slot *slot; |
e3017af9 LP |
2222 | usec_t n; |
2223 | int r; | |
2224 | ||
2225 | assert(bus); | |
2226 | ||
2227 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2228 | if (!c) | |
2229 | return 0; | |
2230 | ||
2231 | n = now(CLOCK_MONOTONIC); | |
2232 | if (c->timeout > n) | |
2233 | return 0; | |
2234 | ||
eb01ba5d LP |
2235 | r = bus_message_new_synthetic_error( |
2236 | bus, | |
693eb9a2 | 2237 | c->cookie, |
14c24659 | 2238 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2239 | &m); |
2240 | if (r < 0) | |
2241 | return r; | |
2242 | ||
7adc46fc | 2243 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2244 | if (r < 0) |
2245 | return r; | |
2246 | ||
e3017af9 | 2247 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2248 | c->timeout = 0; |
2249 | ||
c9fe4af7 | 2250 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2251 | c->cookie = 0; |
2252 | ||
1b64f838 | 2253 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2254 | |
718db961 LP |
2255 | bus->iteration_counter ++; |
2256 | ||
1b64f838 LP |
2257 | bus->current_message = m; |
2258 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2259 | bus->current_handler = c->callback; |
2260 | bus->current_userdata = slot->userdata; | |
19070062 | 2261 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2262 | bus->current_userdata = NULL; |
2263 | bus->current_handler = NULL; | |
d974ad05 | 2264 | bus->current_slot = NULL; |
19befb2d | 2265 | bus->current_message = NULL; |
718db961 | 2266 | |
1b64f838 LP |
2267 | if (slot->floating) { |
2268 | bus_slot_disconnect(slot); | |
2269 | sd_bus_slot_unref(slot); | |
2270 | } | |
2271 | ||
d974ad05 DH |
2272 | sd_bus_slot_unref(slot); |
2273 | ||
1b64f838 | 2274 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2275 | } |
2276 | ||
9d373862 LP |
2277 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2278 | assert(bus); | |
2279 | assert(m); | |
2280 | ||
2281 | if (bus->state != BUS_HELLO) | |
2282 | return 0; | |
2283 | ||
2284 | /* Let's make sure the first message on the bus is the HELLO | |
2285 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2286 | * here (we leave that to the usual handling), we just verify |
2287 | * we don't let any earlier msg through. */ | |
9d373862 | 2288 | |
40ca29a1 LP |
2289 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2290 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2291 | return -EIO; |
2292 | ||
19befb2d | 2293 | if (m->reply_cookie != 1) |
9d373862 LP |
2294 | return -EIO; |
2295 | ||
2296 | return 0; | |
2297 | } | |
2298 | ||
a652755d | 2299 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2300 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2301 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2302 | struct reply_callback *c; |
1b64f838 | 2303 | sd_bus_slot *slot; |
a652755d LP |
2304 | int r; |
2305 | ||
2306 | assert(bus); | |
2307 | assert(m); | |
2308 | ||
40ca29a1 LP |
2309 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2310 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2311 | return 0; |
2312 | ||
09365592 LP |
2313 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2314 | return 0; | |
2315 | ||
2316 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2317 | return 0; | |
2318 | ||
c9fe4af7 | 2319 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2320 | if (!c) |
2321 | return 0; | |
2322 | ||
19befb2d | 2323 | c->cookie = 0; |
19befb2d | 2324 | |
1b64f838 | 2325 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2326 | |
2ce97e2b LP |
2327 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2328 | ||
2329 | /* If the reply contained a file descriptor which we | |
2330 | * didn't want we pass an error instead. */ | |
2331 | ||
2332 | r = bus_message_new_synthetic_error( | |
2333 | bus, | |
2334 | m->reply_cookie, | |
2335 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2336 | &synthetic_reply); | |
2337 | if (r < 0) | |
1b64f838 | 2338 | return r; |
2ce97e2b | 2339 | |
52cd5877 LP |
2340 | /* Copy over original timestamp */ |
2341 | synthetic_reply->realtime = m->realtime; | |
2342 | synthetic_reply->monotonic = m->monotonic; | |
2343 | synthetic_reply->seqnum = m->seqnum; | |
2344 | ||
2ce97e2b LP |
2345 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2346 | if (r < 0) | |
1b64f838 | 2347 | return r; |
2ce97e2b LP |
2348 | |
2349 | m = synthetic_reply; | |
2350 | } else { | |
2351 | r = sd_bus_message_rewind(m, true); | |
2352 | if (r < 0) | |
1b64f838 | 2353 | return r; |
2ce97e2b | 2354 | } |
88fe224c | 2355 | |
1b64f838 LP |
2356 | if (c->timeout != 0) { |
2357 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2358 | c->timeout = 0; | |
2359 | } | |
19befb2d | 2360 | |
1b64f838 | 2361 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2362 | bus->current_handler = c->callback; |
2363 | bus->current_userdata = slot->userdata; | |
19070062 | 2364 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2365 | bus->current_userdata = NULL; |
2366 | bus->current_handler = NULL; | |
d974ad05 | 2367 | bus->current_slot = NULL; |
a652755d | 2368 | |
19befb2d LP |
2369 | if (slot->floating) { |
2370 | bus_slot_disconnect(slot); | |
2371 | sd_bus_slot_unref(slot); | |
2372 | } | |
2373 | ||
d974ad05 DH |
2374 | sd_bus_slot_unref(slot); |
2375 | ||
1b64f838 | 2376 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2377 | } |
2378 | ||
2379 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2380 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2381 | struct filter_callback *l; |
2382 | int r; | |
2383 | ||
392d5b37 LP |
2384 | assert(bus); |
2385 | assert(m); | |
2386 | ||
7286037f LP |
2387 | do { |
2388 | bus->filter_callbacks_modified = false; | |
2389 | ||
2390 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2391 | sd_bus_slot *slot; |
7286037f LP |
2392 | |
2393 | if (bus->filter_callbacks_modified) | |
2394 | break; | |
2395 | ||
2396 | /* Don't run this more than once per iteration */ | |
2397 | if (l->last_iteration == bus->iteration_counter) | |
2398 | continue; | |
2399 | ||
2400 | l->last_iteration = bus->iteration_counter; | |
2401 | ||
88fe224c LP |
2402 | r = sd_bus_message_rewind(m, true); |
2403 | if (r < 0) | |
2404 | return r; | |
2405 | ||
1b64f838 LP |
2406 | slot = container_of(l, sd_bus_slot, filter_callback); |
2407 | ||
2408 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2409 | bus->current_handler = l->callback; |
2410 | bus->current_userdata = slot->userdata; | |
19070062 | 2411 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2412 | bus->current_userdata = NULL; |
2413 | bus->current_handler = NULL; | |
1b64f838 | 2414 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2415 | |
ebcf1f97 | 2416 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2417 | if (r != 0) |
2418 | return r; | |
2419 | ||
2420 | } | |
2421 | ||
2422 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2423 | |
2424 | return 0; | |
2425 | } | |
2426 | ||
392d5b37 | 2427 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2428 | int r; |
2429 | ||
392d5b37 LP |
2430 | assert(bus); |
2431 | assert(m); | |
2432 | ||
7286037f LP |
2433 | do { |
2434 | bus->match_callbacks_modified = false; | |
2435 | ||
eb01ba5d | 2436 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2437 | if (r != 0) |
2438 | return r; | |
2439 | ||
2440 | } while (bus->match_callbacks_modified); | |
2441 | ||
2442 | return 0; | |
392d5b37 LP |
2443 | } |
2444 | ||
b9bf7e2b LP |
2445 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2446 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2447 | int r; | |
2448 | ||
2449 | assert(bus); | |
2450 | assert(m); | |
2451 | ||
09365592 LP |
2452 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2453 | return 0; | |
2454 | ||
758bf0c7 LP |
2455 | if (bus->manual_peer_interface) |
2456 | return 0; | |
2457 | ||
40ca29a1 | 2458 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2459 | return 0; |
2460 | ||
2461 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2462 | return 0; | |
2463 | ||
0461f8cd | 2464 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2465 | return 1; |
2466 | ||
2467 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2468 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2469 | else if (streq_ptr(m->member, "GetMachineId")) { |
2470 | sd_id128_t id; | |
2471 | char sid[33]; | |
2472 | ||
2473 | r = sd_id128_get_machine(&id); | |
2474 | if (r < 0) | |
2475 | return r; | |
2476 | ||
df2d202e | 2477 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2478 | if (r < 0) |
2479 | return r; | |
2480 | ||
2481 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2482 | } else { | |
29ddb38f | 2483 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2484 | m, &reply, |
40ca29a1 | 2485 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2486 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2487 | } |
2488 | ||
2489 | if (r < 0) | |
2490 | return r; | |
2491 | ||
2492 | r = sd_bus_send(bus, reply, NULL); | |
2493 | if (r < 0) | |
2494 | return r; | |
2495 | ||
2496 | return 1; | |
2497 | } | |
2498 | ||
2ce97e2b LP |
2499 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2500 | assert(bus); | |
2501 | assert(m); | |
2502 | ||
2503 | /* If we got a message with a file descriptor which we didn't | |
2504 | * want to accept, then let's drop it. How can this even | |
2505 | * happen? For example, when the kernel queues a message into | |
2506 | * an activatable names's queue which allows fds, and then is | |
2507 | * delivered to us later even though we ourselves did not | |
2508 | * negotiate it. */ | |
2509 | ||
09365592 LP |
2510 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2511 | return 0; | |
2512 | ||
2ce97e2b LP |
2513 | if (m->n_fds <= 0) |
2514 | return 0; | |
2515 | ||
2516 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2517 | return 0; | |
2518 | ||
2519 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2520 | return 1; /* just eat it up */ | |
2521 | ||
2522 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2523 | } | |
2524 | ||
992c052c | 2525 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2526 | int r; |
2527 | ||
2528 | assert(bus); | |
992c052c | 2529 | assert(m); |
e3017af9 | 2530 | |
19befb2d | 2531 | bus->current_message = m; |
992c052c | 2532 | bus->iteration_counter++; |
e3017af9 | 2533 | |
f9f97ca6 | 2534 | log_debug_bus_message(m); |
40ca29a1 | 2535 | |
992c052c LP |
2536 | r = process_hello(bus, m); |
2537 | if (r != 0) | |
affff0b6 | 2538 | goto finish; |
a652755d | 2539 | |
992c052c LP |
2540 | r = process_reply(bus, m); |
2541 | if (r != 0) | |
affff0b6 | 2542 | goto finish; |
e3017af9 | 2543 | |
2ce97e2b LP |
2544 | r = process_fd_check(bus, m); |
2545 | if (r != 0) | |
2546 | goto finish; | |
2547 | ||
992c052c LP |
2548 | r = process_filter(bus, m); |
2549 | if (r != 0) | |
affff0b6 | 2550 | goto finish; |
a652755d | 2551 | |
992c052c LP |
2552 | r = process_match(bus, m); |
2553 | if (r != 0) | |
affff0b6 | 2554 | goto finish; |
a652755d | 2555 | |
992c052c LP |
2556 | r = process_builtin(bus, m); |
2557 | if (r != 0) | |
affff0b6 LP |
2558 | goto finish; |
2559 | ||
2560 | r = bus_process_object(bus, m); | |
a652755d | 2561 | |
affff0b6 | 2562 | finish: |
19befb2d | 2563 | bus->current_message = NULL; |
affff0b6 | 2564 | return r; |
29ddb38f | 2565 | } |
88fe224c | 2566 | |
8f8f05a9 LP |
2567 | static int dispatch_track(sd_bus *bus) { |
2568 | assert(bus); | |
2569 | ||
2570 | if (!bus->track_queue) | |
2571 | return 0; | |
2572 | ||
2573 | bus_track_dispatch(bus->track_queue); | |
2574 | return 1; | |
2575 | } | |
2576 | ||
766c5809 | 2577 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2578 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2579 | int r; |
a652755d | 2580 | |
29ddb38f | 2581 | assert(bus); |
992c052c | 2582 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2583 | |
992c052c LP |
2584 | r = process_timeout(bus); |
2585 | if (r != 0) | |
2586 | goto null_message; | |
7286037f | 2587 | |
992c052c LP |
2588 | r = dispatch_wqueue(bus); |
2589 | if (r != 0) | |
2590 | goto null_message; | |
7286037f | 2591 | |
8f8f05a9 LP |
2592 | r = dispatch_track(bus); |
2593 | if (r != 0) | |
2594 | goto null_message; | |
2595 | ||
766c5809 | 2596 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2597 | if (r < 0) |
2598 | return r; | |
2599 | if (!m) | |
2600 | goto null_message; | |
7286037f | 2601 | |
992c052c LP |
2602 | r = process_message(bus, m); |
2603 | if (r != 0) | |
2604 | goto null_message; | |
7286037f | 2605 | |
992c052c LP |
2606 | if (ret) { |
2607 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2608 | if (r < 0) |
2609 | return r; | |
e3017af9 | 2610 | |
992c052c LP |
2611 | *ret = m; |
2612 | m = NULL; | |
2613 | return 1; | |
2614 | } | |
a652755d | 2615 | |
40ca29a1 | 2616 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2617 | |
dc74ce9b LP |
2618 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2619 | strna(sd_bus_message_get_sender(m)), | |
2620 | strna(sd_bus_message_get_path(m)), | |
2621 | strna(sd_bus_message_get_interface(m)), | |
2622 | strna(sd_bus_message_get_member(m))); | |
2623 | ||
992c052c | 2624 | r = sd_bus_reply_method_errorf( |
df2d202e | 2625 | m, |
40ca29a1 | 2626 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2627 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2628 | if (r < 0) |
2629 | return r; | |
2630 | } | |
e3017af9 | 2631 | |
992c052c | 2632 | return 1; |
0a72c2bd | 2633 | |
992c052c LP |
2634 | null_message: |
2635 | if (r >= 0 && ret) | |
2636 | *ret = NULL; | |
0a72c2bd | 2637 | |
992c052c | 2638 | return r; |
29ddb38f | 2639 | } |
0a72c2bd | 2640 | |
718db961 LP |
2641 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2642 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2643 | struct reply_callback *c; | |
2644 | int r; | |
2645 | ||
2646 | assert(bus); | |
2647 | assert(bus->state == BUS_CLOSING); | |
2648 | ||
c9fe4af7 | 2649 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2650 | if (c) { |
ebcf1f97 | 2651 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2652 | sd_bus_slot *slot; |
ebcf1f97 | 2653 | |
718db961 LP |
2654 | /* First, fail all outstanding method calls */ |
2655 | r = bus_message_new_synthetic_error( | |
2656 | bus, | |
693eb9a2 | 2657 | c->cookie, |
14c24659 | 2658 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2659 | &m); |
2660 | if (r < 0) | |
2661 | return r; | |
2662 | ||
7adc46fc | 2663 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2664 | if (r < 0) |
2665 | return r; | |
2666 | ||
19befb2d | 2667 | if (c->timeout != 0) { |
718db961 | 2668 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2669 | c->timeout = 0; |
2670 | } | |
718db961 | 2671 | |
c9fe4af7 | 2672 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2673 | c->cookie = 0; |
2674 | ||
1b64f838 | 2675 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2676 | |
718db961 LP |
2677 | bus->iteration_counter++; |
2678 | ||
1b64f838 LP |
2679 | bus->current_message = m; |
2680 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2681 | bus->current_handler = c->callback; |
2682 | bus->current_userdata = slot->userdata; | |
19070062 | 2683 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2684 | bus->current_userdata = NULL; |
2685 | bus->current_handler = NULL; | |
d974ad05 | 2686 | bus->current_slot = NULL; |
1b64f838 LP |
2687 | bus->current_message = NULL; |
2688 | ||
2689 | if (slot->floating) { | |
2690 | bus_slot_disconnect(slot); | |
2691 | sd_bus_slot_unref(slot); | |
2692 | } | |
718db961 | 2693 | |
d974ad05 DH |
2694 | sd_bus_slot_unref(slot); |
2695 | ||
1b64f838 | 2696 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2697 | } |
2698 | ||
2699 | /* Then, synthesize a Disconnected message */ | |
2700 | r = sd_bus_message_new_signal( | |
2701 | bus, | |
151b9b96 | 2702 | &m, |
718db961 LP |
2703 | "/org/freedesktop/DBus/Local", |
2704 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2705 | "Disconnected"); |
718db961 LP |
2706 | if (r < 0) |
2707 | return r; | |
2708 | ||
fb6d9b77 | 2709 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2710 | |
7adc46fc | 2711 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2712 | if (r < 0) |
2713 | return r; | |
2714 | ||
2715 | sd_bus_close(bus); | |
2716 | ||
19befb2d | 2717 | bus->current_message = m; |
718db961 LP |
2718 | bus->iteration_counter++; |
2719 | ||
2720 | r = process_filter(bus, m); | |
2721 | if (r != 0) | |
2722 | goto finish; | |
2723 | ||
2724 | r = process_match(bus, m); | |
2725 | if (r != 0) | |
2726 | goto finish; | |
2727 | ||
2728 | if (ret) { | |
2729 | *ret = m; | |
2730 | m = NULL; | |
2731 | } | |
2732 | ||
2733 | r = 1; | |
2734 | ||
2735 | finish: | |
19befb2d LP |
2736 | bus->current_message = NULL; |
2737 | ||
718db961 LP |
2738 | return r; |
2739 | } | |
2740 | ||
766c5809 | 2741 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2742 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2743 | int r; |
0a72c2bd | 2744 | |
992c052c LP |
2745 | /* Returns 0 when we didn't do anything. This should cause the |
2746 | * caller to invoke sd_bus_wait() before returning the next | |
2747 | * time. Returns > 0 when we did something, which possibly | |
2748 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2749 | |
d6888822 LP |
2750 | assert_return(bus, -EINVAL); |
2751 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2752 | |
992c052c | 2753 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2754 | assert_return(!bus->current_message, -EBUSY); |
2755 | assert(!bus->current_slot); | |
0a72c2bd | 2756 | |
992c052c | 2757 | switch (bus->state) { |
0a72c2bd | 2758 | |
992c052c | 2759 | case BUS_UNSET: |
992c052c | 2760 | return -ENOTCONN; |
0a72c2bd | 2761 | |
6d6f4904 LP |
2762 | case BUS_CLOSED: |
2763 | return -ECONNRESET; | |
2764 | ||
992c052c LP |
2765 | case BUS_OPENING: |
2766 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2767 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2768 | bus_enter_closing(bus); |
2769 | r = 1; | |
2770 | } else if (r < 0) | |
29ddb38f | 2771 | return r; |
992c052c LP |
2772 | if (ret) |
2773 | *ret = NULL; | |
a652755d LP |
2774 | return r; |
2775 | ||
992c052c | 2776 | case BUS_AUTHENTICATING: |
992c052c | 2777 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2778 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2779 | bus_enter_closing(bus); |
2780 | r = 1; | |
2781 | } else if (r < 0) | |
29ddb38f | 2782 | return r; |
718db961 | 2783 | |
992c052c LP |
2784 | if (ret) |
2785 | *ret = NULL; | |
718db961 | 2786 | |
992c052c | 2787 | return r; |
a652755d | 2788 | |
992c052c LP |
2789 | case BUS_RUNNING: |
2790 | case BUS_HELLO: | |
766c5809 | 2791 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2792 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2793 | bus_enter_closing(bus); |
2794 | r = 1; | |
2795 | ||
2796 | if (ret) | |
2797 | *ret = NULL; | |
2798 | } | |
43a43f50 | 2799 | |
43a43f50 | 2800 | return r; |
718db961 LP |
2801 | |
2802 | case BUS_CLOSING: | |
2803 | return process_closing(bus, ret); | |
992c052c | 2804 | } |
43a43f50 | 2805 | |
992c052c | 2806 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2807 | } |
2808 | ||
766c5809 LP |
2809 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2810 | return bus_process_internal(bus, false, 0, ret); | |
2811 | } | |
2812 | ||
2813 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2814 | return bus_process_internal(bus, true, priority, ret); | |
2815 | } | |
2816 | ||
992c052c LP |
2817 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2818 | struct pollfd p[2] = {}; | |
2819 | int r, e, n; | |
2820 | struct timespec ts; | |
3a43da28 | 2821 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2822 | |
2823 | assert(bus); | |
718db961 LP |
2824 | |
2825 | if (bus->state == BUS_CLOSING) | |
2826 | return 1; | |
2827 | ||
a3d59cd1 LP |
2828 | if (!BUS_IS_OPEN(bus->state)) |
2829 | return -ENOTCONN; | |
adcdb374 | 2830 | |
992c052c LP |
2831 | e = sd_bus_get_events(bus); |
2832 | if (e < 0) | |
2833 | return e; | |
adcdb374 | 2834 | |
992c052c | 2835 | if (need_more) |
8efd6381 LP |
2836 | /* The caller really needs some more data, he doesn't |
2837 | * care about what's already read, or any timeouts | |
ad67ef27 | 2838 | * except its own. */ |
992c052c | 2839 | e |= POLLIN; |
992c052c | 2840 | else { |
8efd6381 LP |
2841 | usec_t until; |
2842 | /* The caller wants to process if there's something to | |
2843 | * process, but doesn't care otherwise */ | |
2844 | ||
2845 | r = sd_bus_get_timeout(bus, &until); | |
2846 | if (r < 0) | |
2847 | return r; | |
2848 | if (r > 0) { | |
2849 | usec_t nw; | |
2850 | nw = now(CLOCK_MONOTONIC); | |
2851 | m = until > nw ? until - nw : 0; | |
2852 | } | |
992c052c | 2853 | } |
adcdb374 | 2854 | |
992c052c LP |
2855 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2856 | m = timeout_usec; | |
adcdb374 | 2857 | |
992c052c LP |
2858 | p[0].fd = bus->input_fd; |
2859 | if (bus->output_fd == bus->input_fd) { | |
2860 | p[0].events = e; | |
2861 | n = 1; | |
2862 | } else { | |
2863 | p[0].events = e & POLLIN; | |
2864 | p[1].fd = bus->output_fd; | |
2865 | p[1].events = e & POLLOUT; | |
2866 | n = 2; | |
adcdb374 LP |
2867 | } |
2868 | ||
992c052c | 2869 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2870 | if (r < 0) |
992c052c | 2871 | return -errno; |
adcdb374 | 2872 | |
992c052c | 2873 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2874 | } |
2875 | ||
d9f644e2 | 2876 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2877 | |
d6888822 | 2878 | assert_return(bus, -EINVAL); |
d6888822 | 2879 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2880 | |
718db961 LP |
2881 | if (bus->state == BUS_CLOSING) |
2882 | return 0; | |
2883 | ||
a3d59cd1 LP |
2884 | if (!BUS_IS_OPEN(bus->state)) |
2885 | return -ENOTCONN; | |
718db961 | 2886 | |
992c052c LP |
2887 | if (bus->rqueue_size > 0) |
2888 | return 0; | |
9db76355 | 2889 | |
992c052c LP |
2890 | return bus_poll(bus, false, timeout_usec); |
2891 | } | |
9db76355 | 2892 | |
d9f644e2 | 2893 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2894 | int r; |
9db76355 | 2895 | |
d6888822 | 2896 | assert_return(bus, -EINVAL); |
d6888822 | 2897 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2898 | |
718db961 LP |
2899 | if (bus->state == BUS_CLOSING) |
2900 | return 0; | |
2901 | ||
a3d59cd1 LP |
2902 | if (!BUS_IS_OPEN(bus->state)) |
2903 | return -ENOTCONN; | |
718db961 | 2904 | |
992c052c LP |
2905 | r = bus_ensure_running(bus); |
2906 | if (r < 0) | |
2907 | return r; | |
9db76355 | 2908 | |
992c052c LP |
2909 | if (bus->wqueue_size <= 0) |
2910 | return 0; | |
9db76355 | 2911 | |
992c052c LP |
2912 | for (;;) { |
2913 | r = dispatch_wqueue(bus); | |
32f46480 | 2914 | if (r < 0) { |
441d56a1 | 2915 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2916 | bus_enter_closing(bus); |
441d56a1 LP |
2917 | return -ECONNRESET; |
2918 | } | |
32f46480 | 2919 | |
9db76355 | 2920 | return r; |
32f46480 | 2921 | } |
9db76355 | 2922 | |
992c052c LP |
2923 | if (bus->wqueue_size <= 0) |
2924 | return 0; | |
9db76355 | 2925 | |
992c052c | 2926 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2927 | if (r < 0) |
2928 | return r; | |
9db76355 | 2929 | } |
9db76355 LP |
2930 | } |
2931 | ||
19befb2d LP |
2932 | _public_ int sd_bus_add_filter( |
2933 | sd_bus *bus, | |
2934 | sd_bus_slot **slot, | |
2935 | sd_bus_message_handler_t callback, | |
2936 | void *userdata) { | |
d9f644e2 | 2937 | |
19befb2d | 2938 | sd_bus_slot *s; |
de1c301e | 2939 | |
d6888822 LP |
2940 | assert_return(bus, -EINVAL); |
2941 | assert_return(callback, -EINVAL); | |
2942 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2943 | |
19befb2d LP |
2944 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2945 | if (!s) | |
29ddb38f LP |
2946 | return -ENOMEM; |
2947 | ||
19befb2d | 2948 | s->filter_callback.callback = callback; |
a652755d | 2949 | |
19befb2d LP |
2950 | bus->filter_callbacks_modified = true; |
2951 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2952 | |
19befb2d LP |
2953 | if (slot) |
2954 | *slot = s; | |
29ddb38f | 2955 | |
992c052c | 2956 | return 0; |
a652755d | 2957 | } |
392d5b37 | 2958 | |
19befb2d LP |
2959 | _public_ int sd_bus_add_match( |
2960 | sd_bus *bus, | |
2961 | sd_bus_slot **slot, | |
2962 | const char *match, | |
2963 | sd_bus_message_handler_t callback, | |
2964 | void *userdata) { | |
d9f644e2 | 2965 | |
992c052c LP |
2966 | struct bus_match_component *components = NULL; |
2967 | unsigned n_components = 0; | |
2915234d | 2968 | sd_bus_slot *s = NULL; |
992c052c | 2969 | int r = 0; |
392d5b37 | 2970 | |
d6888822 LP |
2971 | assert_return(bus, -EINVAL); |
2972 | assert_return(match, -EINVAL); | |
2973 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2974 | |
992c052c LP |
2975 | r = bus_match_parse(match, &components, &n_components); |
2976 | if (r < 0) | |
2977 | goto finish; | |
29ddb38f | 2978 | |
19befb2d LP |
2979 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2980 | if (!s) { | |
2981 | r = -ENOMEM; | |
2982 | goto finish; | |
2983 | } | |
2984 | ||
2985 | s->match_callback.callback = callback; | |
2986 | s->match_callback.cookie = ++bus->match_cookie; | |
2987 | ||
992c052c | 2988 | if (bus->bus_client) { |
cc65fe5e | 2989 | enum bus_match_scope scope; |
29ddb38f | 2990 | |
cc65fe5e | 2991 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 2992 | |
cc65fe5e LP |
2993 | /* Do not install server-side matches for matches |
2994 | * against the local service, interface or bus | |
9ee7a50c DH |
2995 | * path. */ |
2996 | if (scope != BUS_MATCH_LOCAL) { | |
cc65fe5e LP |
2997 | |
2998 | if (!bus->is_kernel) { | |
2999 | /* When this is not a kernel transport, we | |
3000 | * store the original match string, so that we | |
3001 | * can use it to remove the match again */ | |
3002 | ||
3003 | s->match_callback.match_string = strdup(match); | |
3004 | if (!s->match_callback.match_string) { | |
3005 | r = -ENOMEM; | |
3006 | goto finish; | |
3007 | } | |
19befb2d | 3008 | } |
19befb2d | 3009 | |
cc65fe5e LP |
3010 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); |
3011 | if (r < 0) | |
3012 | goto finish; | |
3013 | ||
3014 | s->match_added = true; | |
3015 | } | |
392d5b37 LP |
3016 | } |
3017 | ||
992c052c | 3018 | bus->match_callbacks_modified = true; |
19befb2d LP |
3019 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3020 | if (r < 0) | |
3021 | goto finish; | |
3022 | ||
3023 | if (slot) | |
3024 | *slot = s; | |
3025 | s = NULL; | |
917b5dc7 | 3026 | |
992c052c LP |
3027 | finish: |
3028 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3029 | sd_bus_slot_unref(s); |
3030 | ||
992c052c | 3031 | return r; |
917b5dc7 LP |
3032 | } |
3033 | ||
19befb2d LP |
3034 | int bus_remove_match_by_string( |
3035 | sd_bus *bus, | |
3036 | const char *match, | |
3037 | sd_bus_message_handler_t callback, | |
3038 | void *userdata) { | |
d9f644e2 | 3039 | |
992c052c LP |
3040 | struct bus_match_component *components = NULL; |
3041 | unsigned n_components = 0; | |
19befb2d LP |
3042 | struct match_callback *c; |
3043 | int r = 0; | |
917b5dc7 | 3044 | |
d6888822 LP |
3045 | assert_return(bus, -EINVAL); |
3046 | assert_return(match, -EINVAL); | |
3047 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3048 | |
992c052c | 3049 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3050 | if (r < 0) |
19befb2d | 3051 | goto finish; |
f10dda3b | 3052 | |
19befb2d LP |
3053 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3054 | if (r <= 0) | |
3055 | goto finish; | |
f10dda3b | 3056 | |
19befb2d | 3057 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3058 | |
19befb2d | 3059 | finish: |
992c052c | 3060 | bus_match_parse_free(components, n_components); |
f10dda3b | 3061 | |
19befb2d | 3062 | return r; |
f10dda3b LP |
3063 | } |
3064 | ||
992c052c LP |
3065 | bool bus_pid_changed(sd_bus *bus) { |
3066 | assert(bus); | |
f10dda3b | 3067 | |
992c052c LP |
3068 | /* We don't support people creating a bus connection and |
3069 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3070 | |
992c052c | 3071 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3072 | } |
40ca29a1 LP |
3073 | |
3074 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3075 | sd_bus *bus = userdata; |
40ca29a1 LP |
3076 | int r; |
3077 | ||
3078 | assert(bus); | |
3079 | ||
3080 | r = sd_bus_process(bus, NULL); | |
3081 | if (r < 0) | |
3082 | return r; | |
3083 | ||
3084 | return 1; | |
3085 | } | |
3086 | ||
3087 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3088 | sd_bus *bus = userdata; |
40ca29a1 LP |
3089 | int r; |
3090 | ||
3091 | assert(bus); | |
3092 | ||
3093 | r = sd_bus_process(bus, NULL); | |
3094 | if (r < 0) | |
3095 | return r; | |
3096 | ||
3097 | return 1; | |
3098 | } | |
3099 | ||
3100 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3101 | sd_bus *bus = userdata; | |
3102 | int r, e; | |
3103 | usec_t until; | |
3104 | ||
3105 | assert(s); | |
3106 | assert(bus); | |
3107 | ||
3108 | e = sd_bus_get_events(bus); | |
3109 | if (e < 0) | |
3110 | return e; | |
3111 | ||
3112 | if (bus->output_fd != bus->input_fd) { | |
3113 | ||
3114 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3115 | if (r < 0) | |
3116 | return r; | |
3117 | ||
3118 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3119 | if (r < 0) | |
3120 | return r; | |
3121 | } else { | |
3122 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3123 | if (r < 0) | |
3124 | return r; | |
3125 | } | |
3126 | ||
3127 | r = sd_bus_get_timeout(bus, &until); | |
3128 | if (r < 0) | |
3129 | return r; | |
3130 | if (r > 0) { | |
3131 | int j; | |
3132 | ||
3133 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3134 | if (j < 0) | |
3135 | return j; | |
3136 | } | |
3137 | ||
3138 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3139 | if (r < 0) | |
3140 | return r; | |
3141 | ||
3142 | return 1; | |
3143 | } | |
3144 | ||
abc5fe72 LP |
3145 | static int quit_callback(sd_event_source *event, void *userdata) { |
3146 | sd_bus *bus = userdata; | |
3147 | ||
3148 | assert(event); | |
3149 | ||
3150 | sd_bus_flush(bus); | |
7bb4d371 | 3151 | sd_bus_close(bus); |
abc5fe72 LP |
3152 | |
3153 | return 1; | |
3154 | } | |
3155 | ||
1e05d493 LP |
3156 | static int attach_io_events(sd_bus *bus) { |
3157 | int r; | |
3158 | ||
3159 | assert(bus); | |
3160 | ||
3161 | if (bus->input_fd < 0) | |
3162 | return 0; | |
3163 | ||
3164 | if (!bus->event) | |
3165 | return 0; | |
3166 | ||
3167 | if (!bus->input_io_event_source) { | |
151b9b96 | 3168 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3169 | if (r < 0) |
3170 | return r; | |
3171 | ||
3172 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3173 | if (r < 0) | |
3174 | return r; | |
3175 | ||
3176 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3177 | if (r < 0) |
3178 | return r; | |
3179 | ||
356779df | 3180 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3181 | } else |
3182 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3183 | ||
3184 | if (r < 0) | |
3185 | return r; | |
3186 | ||
3187 | if (bus->output_fd != bus->input_fd) { | |
3188 | assert(bus->output_fd >= 0); | |
3189 | ||
3190 | if (!bus->output_io_event_source) { | |
151b9b96 | 3191 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3192 | if (r < 0) |
3193 | return r; | |
3194 | ||
3195 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3196 | if (r < 0) |
3197 | return r; | |
3198 | ||
356779df | 3199 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3200 | } else |
3201 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3202 | ||
3203 | if (r < 0) | |
3204 | return r; | |
3205 | } | |
3206 | ||
3207 | return 0; | |
3208 | } | |
3209 | ||
3210 | static void detach_io_events(sd_bus *bus) { | |
3211 | assert(bus); | |
3212 | ||
3213 | if (bus->input_io_event_source) { | |
3214 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3215 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3216 | } | |
3217 | ||
3218 | if (bus->output_io_event_source) { | |
3219 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3220 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3221 | } | |
3222 | } | |
3223 | ||
d9f644e2 | 3224 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3225 | int r; |
3226 | ||
3227 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3228 | assert_return(!bus->event, -EBUSY); |
3229 | ||
3230 | assert(!bus->input_io_event_source); | |
3231 | assert(!bus->output_io_event_source); | |
3232 | assert(!bus->time_event_source); | |
3233 | ||
76b54375 LP |
3234 | if (event) |
3235 | bus->event = sd_event_ref(event); | |
3236 | else { | |
3237 | r = sd_event_default(&bus->event); | |
3238 | if (r < 0) | |
3239 | return r; | |
3240 | } | |
40ca29a1 | 3241 | |
1e05d493 | 3242 | bus->event_priority = priority; |
40ca29a1 | 3243 | |
6a0f1f6d | 3244 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3245 | if (r < 0) |
3246 | goto fail; | |
3247 | ||
3248 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3249 | if (r < 0) | |
3250 | goto fail; | |
3251 | ||
356779df | 3252 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3253 | if (r < 0) |
3254 | goto fail; | |
3255 | ||
151b9b96 | 3256 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3257 | if (r < 0) |
3258 | goto fail; | |
3259 | ||
356779df | 3260 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3261 | if (r < 0) |
3262 | goto fail; | |
3263 | ||
1e05d493 LP |
3264 | r = attach_io_events(bus); |
3265 | if (r < 0) | |
3266 | goto fail; | |
3267 | ||
40ca29a1 LP |
3268 | return 0; |
3269 | ||
3270 | fail: | |
3271 | sd_bus_detach_event(bus); | |
3272 | return r; | |
3273 | } | |
3274 | ||
d9f644e2 | 3275 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3276 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3277 | |
3278 | if (!bus->event) | |
3279 | return 0; | |
40ca29a1 | 3280 | |
1e05d493 | 3281 | detach_io_events(bus); |
40ca29a1 | 3282 | |
86befb40 LP |
3283 | if (bus->time_event_source) { |
3284 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3285 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3286 | } |
40ca29a1 | 3287 | |
86befb40 LP |
3288 | if (bus->quit_event_source) { |
3289 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3290 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3291 | } |
abc5fe72 | 3292 | |
93f1bcf4 | 3293 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3294 | return 1; |
40ca29a1 | 3295 | } |
affff0b6 | 3296 | |
2be44176 LP |
3297 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3298 | assert_return(bus, NULL); | |
3299 | ||
3300 | return bus->event; | |
3301 | } | |
3302 | ||
19befb2d LP |
3303 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3304 | assert_return(bus, NULL); | |
3305 | ||
3306 | return bus->current_message; | |
3307 | } | |
3308 | ||
3309 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3310 | assert_return(bus, NULL); |
3311 | ||
19befb2d | 3312 | return bus->current_slot; |
affff0b6 | 3313 | } |
76b54375 | 3314 | |
caa82984 LP |
3315 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3316 | assert_return(bus, NULL); | |
3317 | ||
3318 | return bus->current_handler; | |
3319 | } | |
3320 | ||
3321 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3322 | assert_return(bus, NULL); | |
3323 | ||
3324 | return bus->current_userdata; | |
3325 | } | |
3326 | ||
76b54375 LP |
3327 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3328 | sd_bus *b = NULL; | |
3329 | int r; | |
3330 | ||
3331 | assert(bus_open); | |
3332 | assert(default_bus); | |
3333 | ||
3334 | if (!ret) | |
3335 | return !!*default_bus; | |
3336 | ||
3337 | if (*default_bus) { | |
3338 | *ret = sd_bus_ref(*default_bus); | |
3339 | return 0; | |
3340 | } | |
3341 | ||
3342 | r = bus_open(&b); | |
3343 | if (r < 0) | |
3344 | return r; | |
3345 | ||
3346 | b->default_bus_ptr = default_bus; | |
3347 | b->tid = gettid(); | |
3348 | *default_bus = b; | |
3349 | ||
3350 | *ret = b; | |
3351 | return 1; | |
3352 | } | |
3353 | ||
3354 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3355 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3356 | } | |
3357 | ||
76b54375 | 3358 | |
fa2f8973 | 3359 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3360 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3361 | } | |
3362 | ||
af08d2f9 LP |
3363 | _public_ int sd_bus_default(sd_bus **ret) { |
3364 | ||
3365 | const char *e; | |
3366 | ||
3367 | /* Let's try our best to reuse another cached connection. If | |
3368 | * the starter bus type is set, connect via our normal | |
3369 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3370 | * we can share the connection with the user/system default | |
3371 | * bus. */ | |
3372 | ||
3373 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3374 | if (e) { | |
3375 | if (streq(e, "system")) | |
3376 | return sd_bus_default_system(ret); | |
09365592 | 3377 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3378 | return sd_bus_default_user(ret); |
3379 | } | |
3380 | ||
3381 | /* No type is specified, so we have not other option than to | |
3382 | * use the starter address if it is set. */ | |
3383 | ||
3384 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3385 | if (e) { | |
af08d2f9 LP |
3386 | |
3387 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3388 | } | |
3389 | ||
3390 | /* Finally, if nothing is set use the cached connection for | |
3391 | * the right scope */ | |
3392 | ||
3393 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3394 | return sd_bus_default_user(ret); | |
3395 | else | |
3396 | return sd_bus_default_system(ret); | |
3397 | } | |
3398 | ||
76b54375 LP |
3399 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3400 | assert_return(b, -EINVAL); | |
3401 | assert_return(tid, -EINVAL); | |
3402 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3403 | ||
3404 | if (b->tid != 0) { | |
3405 | *tid = b->tid; | |
3406 | return 0; | |
3407 | } | |
3408 | ||
3409 | if (b->event) | |
3410 | return sd_event_get_tid(b->event, tid); | |
3411 | ||
3412 | return -ENXIO; | |
3413 | } | |
28383ba1 | 3414 | |
a6278b88 LP |
3415 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3416 | _cleanup_free_ char *e = NULL; | |
3417 | char *ret; | |
3418 | ||
3419 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3420 | assert_return(external_id, -EINVAL); | |
3421 | assert_return(ret_path, -EINVAL); | |
3422 | ||
3423 | e = bus_label_escape(external_id); | |
3424 | if (!e) | |
3425 | return -ENOMEM; | |
3426 | ||
3427 | ret = strjoin(prefix, "/", e, NULL); | |
3428 | if (!ret) | |
3429 | return -ENOMEM; | |
3430 | ||
3431 | *ret_path = ret; | |
3432 | return 0; | |
28383ba1 LP |
3433 | } |
3434 | ||
a6278b88 LP |
3435 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3436 | const char *e; | |
3437 | char *ret; | |
3438 | ||
3439 | assert_return(object_path_is_valid(path), -EINVAL); | |
3440 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3441 | assert_return(external_id, -EINVAL); | |
3442 | ||
3443 | e = object_path_startswith(path, prefix); | |
3444 | if (!e) { | |
3445 | *external_id = NULL; | |
3446 | return 0; | |
3447 | } | |
3448 | ||
3449 | ret = bus_label_unescape(e); | |
3450 | if (!ret) | |
3451 | return -ENOMEM; | |
3452 | ||
3453 | *external_id = ret; | |
3454 | return 1; | |
28383ba1 | 3455 | } |
5b12334d | 3456 | |
ae095f86 LP |
3457 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3458 | int r; | |
3459 | ||
3460 | assert_return(bus, -EINVAL); | |
ae095f86 | 3461 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3462 | |
3463 | if (!bus->is_kernel) | |
15411c0c | 3464 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3465 | |
3466 | if (!BUS_IS_OPEN(bus->state)) | |
3467 | return -ENOTCONN; | |
ae095f86 | 3468 | |
bd746b8b LP |
3469 | if (bus->rqueue_size > 0) |
3470 | return -EBUSY; | |
3471 | ||
14f862a5 LP |
3472 | if (bus->wqueue_size > 0) |
3473 | return -EBUSY; | |
3474 | ||
ae095f86 LP |
3475 | r = bus_kernel_try_close(bus); |
3476 | if (r < 0) | |
3477 | return r; | |
3478 | ||
3479 | sd_bus_close(bus); | |
3480 | return 0; | |
3481 | } | |
5972fe95 | 3482 | |
455971c1 | 3483 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3484 | assert_return(bus, -EINVAL); |
455971c1 | 3485 | assert_return(description, -EINVAL); |
f4b2933e | 3486 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3487 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3488 | ||
455971c1 | 3489 | *description = bus->description; |
5972fe95 LP |
3490 | return 0; |
3491 | } | |
fe3f22d1 DK |
3492 | |
3493 | int bus_get_root_path(sd_bus *bus) { | |
3494 | int r; | |
3495 | ||
3496 | if (bus->cgroup_root) | |
3497 | return 0; | |
3498 | ||
3499 | r = cg_get_root_path(&bus->cgroup_root); | |
3500 | if (r == -ENOENT) { | |
3501 | bus->cgroup_root = strdup("/"); | |
3502 | if (!bus->cgroup_root) | |
3503 | return -ENOMEM; | |
3504 | ||
3505 | r = 0; | |
3506 | } | |
3507 | ||
3508 | return r; | |
3509 | } | |
3acc1daf LP |
3510 | |
3511 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3512 | int r; | |
3513 | ||
3514 | assert_return(bus, -EINVAL); | |
3515 | assert_return(scope, -EINVAL); | |
3516 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3517 | ||
3518 | if (bus->is_kernel) { | |
3519 | _cleanup_free_ char *n = NULL; | |
3520 | const char *dash; | |
3521 | ||
3522 | r = bus_kernel_get_bus_name(bus, &n); | |
3523 | if (r < 0) | |
3524 | return r; | |
3525 | ||
3526 | if (streq(n, "0-system")) { | |
3527 | *scope = "system"; | |
5b820358 | 3528 | return 0; |
3acc1daf LP |
3529 | } |
3530 | ||
3531 | dash = strchr(n, '-'); | |
d2df88ff | 3532 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3533 | *scope = "user"; |
5b820358 | 3534 | return 0; |
3acc1daf LP |
3535 | } |
3536 | } | |
3537 | ||
3538 | if (bus->is_user) { | |
3539 | *scope = "user"; | |
5b820358 | 3540 | return 0; |
3acc1daf LP |
3541 | } |
3542 | ||
3543 | if (bus->is_system) { | |
3544 | *scope = "system"; | |
5b820358 LP |
3545 | return 0; |
3546 | } | |
3547 | ||
3548 | return -ENODATA; | |
3549 | } | |
3550 | ||
3551 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3552 | ||
3553 | assert_return(bus, -EINVAL); | |
3554 | assert_return(address, -EINVAL); | |
3555 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3556 | ||
3557 | if (bus->address) { | |
3558 | *address = bus->address; | |
3559 | return 0; | |
3acc1daf LP |
3560 | } |
3561 | ||
3562 | return -ENODATA; | |
3563 | } | |
224b3787 | 3564 | |
882897af | 3565 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3566 | assert_return(bus, -EINVAL); |
3567 | assert_return(mask, -EINVAL); | |
3568 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3569 | ||
3570 | *mask = bus->creds_mask; | |
3571 | return 0; | |
3572 | } | |
3573 | ||
882897af | 3574 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3575 | assert_return(bus, -EINVAL); |
3576 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3577 | ||
3578 | return bus->bus_client; | |
3579 | } | |
3580 | ||
882897af | 3581 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3582 | assert_return(bus, -EINVAL); |
3583 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3584 | ||
3585 | return bus->is_server; | |
3586 | } | |
3587 | ||
882897af | 3588 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3589 | assert_return(bus, -EINVAL); |
3590 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3591 | ||
3592 | return bus->anonymous_auth; | |
3593 | } | |
3594 | ||
882897af | 3595 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3596 | assert_return(bus, -EINVAL); |
3597 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3598 | ||
3599 | return bus->trusted; | |
3600 | } | |
3601 | ||
882897af | 3602 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3603 | assert_return(bus, -EINVAL); |
3604 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3605 | ||
3606 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3607 | } | |
fa2f8973 LP |
3608 | |
3609 | static void flush_close(sd_bus *bus) { | |
3610 | if (!bus) | |
3611 | return; | |
3612 | ||
3613 | /* Flushes and closes the specified bus. We take a ref before, | |
3614 | * to ensure the flushing does not cause the bus to be | |
3615 | * unreferenced. */ | |
3616 | ||
3617 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
3618 | } | |
3619 | ||
3620 | _public_ void sd_bus_default_flush_close(void) { | |
3621 | flush_close(default_starter_bus); | |
3622 | flush_close(default_user_bus); | |
3623 | flush_close(default_system_bus); | |
3624 | } |