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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 | |
f54514f3 LP |
72 | static void bus_close_fds(sd_bus *b) { |
73 | assert(b); | |
74 | ||
1e05d493 LP |
75 | detach_io_events(b); |
76 | ||
0fd8d506 | 77 | if (b->input_fd != b->output_fd) |
03e334a1 | 78 | safe_close(b->output_fd); |
0fd8d506 | 79 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
80 | } |
81 | ||
0e586eae | 82 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
83 | assert(b); |
84 | ||
f389bf15 LP |
85 | while (b->rqueue_size > 0) |
86 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
87 | ||
253f96e5 | 88 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 89 | b->rqueue_allocated = 0; |
0e586eae | 90 | |
f389bf15 LP |
91 | while (b->wqueue_size > 0) |
92 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 93 | |
253f96e5 | 94 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 95 | b->wqueue_allocated = 0; |
0e586eae LP |
96 | } |
97 | ||
de1c301e | 98 | static void bus_free(sd_bus *b) { |
19befb2d | 99 | sd_bus_slot *s; |
de1c301e LP |
100 | |
101 | assert(b); | |
8f8f05a9 LP |
102 | assert(!b->track_queue); |
103 | ||
19befb2d LP |
104 | b->state = BUS_CLOSED; |
105 | ||
40ca29a1 LP |
106 | sd_bus_detach_event(b); |
107 | ||
19befb2d LP |
108 | while ((s = b->slots)) { |
109 | /* At this point only floating slots can still be | |
110 | * around, because the non-floating ones keep a | |
111 | * reference to the bus, and we thus couldn't be | |
112 | * destructing right now... We forcibly disconnect the | |
113 | * slots here, so that they still can be referenced by | |
114 | * apps, but are dead. */ | |
115 | ||
116 | assert(s->floating); | |
117 | bus_slot_disconnect(s); | |
118 | sd_bus_slot_unref(s); | |
119 | } | |
120 | ||
f4d140e9 LP |
121 | if (b->default_bus_ptr) |
122 | *b->default_bus_ptr = NULL; | |
123 | ||
f54514f3 | 124 | bus_close_fds(b); |
de1c301e | 125 | |
63edf05e LP |
126 | if (b->kdbus_buffer) |
127 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
128 | ||
c4e6556c | 129 | free(b->label); |
de1c301e | 130 | free(b->rbuffer); |
89ffcd2a | 131 | free(b->unique_name); |
2181a7f5 | 132 | free(b->auth_buffer); |
89ffcd2a | 133 | free(b->address); |
e9a967f9 | 134 | free(b->kernel); |
a7893c6b | 135 | free(b->machine); |
8a0e0ed9 | 136 | free(b->fake_label); |
751bc6ac | 137 | free(b->cgroup_root); |
455971c1 | 138 | free(b->description); |
89ffcd2a | 139 | |
2fd9ae2e LP |
140 | free(b->exec_path); |
141 | strv_free(b->exec_argv); | |
142 | ||
2c93b4ef LP |
143 | close_many(b->fds, b->n_fds); |
144 | free(b->fds); | |
145 | ||
0e586eae | 146 | bus_reset_queues(b); |
de1c301e | 147 | |
c9fe4af7 | 148 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 149 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 150 | |
75a0da95 | 151 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
152 | bus_match_free(&b->match_callbacks); |
153 | ||
29ddb38f LP |
154 | hashmap_free_free(b->vtable_methods); |
155 | hashmap_free_free(b->vtable_properties); | |
156 | ||
19befb2d | 157 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
158 | hashmap_free(b->nodes); |
159 | ||
bc7fd8cd LP |
160 | bus_kernel_flush_memfd(b); |
161 | ||
45fbe937 LP |
162 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
163 | ||
de1c301e LP |
164 | free(b); |
165 | } | |
166 | ||
d9f644e2 | 167 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
168 | sd_bus *r; |
169 | ||
d6888822 | 170 | assert_return(ret, -EINVAL); |
021a1e78 | 171 | |
de1c301e LP |
172 | r = new0(sd_bus, 1); |
173 | if (!r) | |
021a1e78 | 174 | return -ENOMEM; |
de1c301e | 175 | |
e4ee6e5c | 176 | r->n_ref = REFCNT_INIT; |
e82c9509 | 177 | r->input_fd = r->output_fd = -1; |
de1c301e | 178 | r->message_version = 1; |
3310dfd5 | 179 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 180 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 181 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 182 | r->original_pid = getpid(); |
de1c301e | 183 | |
45fbe937 LP |
184 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
185 | ||
de1c301e LP |
186 | /* We guarantee that wqueue always has space for at least one |
187 | * entry */ | |
821e0756 | 188 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 189 | free(r); |
021a1e78 | 190 | return -ENOMEM; |
de1c301e LP |
191 | } |
192 | ||
021a1e78 LP |
193 | *ret = r; |
194 | return 0; | |
195 | } | |
196 | ||
d9f644e2 | 197 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
198 | char *a; |
199 | ||
d6888822 LP |
200 | assert_return(bus, -EINVAL); |
201 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
202 | assert_return(address, -EINVAL); | |
203 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
204 | |
205 | a = strdup(address); | |
206 | if (!a) | |
207 | return -ENOMEM; | |
208 | ||
209 | free(bus->address); | |
210 | bus->address = a; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
d9f644e2 | 215 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
216 | assert_return(bus, -EINVAL); |
217 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
218 | assert_return(input_fd >= 0, -EBADF); |
219 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 220 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 221 | |
e82c9509 LP |
222 | bus->input_fd = input_fd; |
223 | bus->output_fd = output_fd; | |
021a1e78 LP |
224 | return 0; |
225 | } | |
226 | ||
d9f644e2 | 227 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
228 | char *p, **a; |
229 | ||
d6888822 LP |
230 | assert_return(bus, -EINVAL); |
231 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
232 | assert_return(path, -EINVAL); | |
233 | assert_return(!strv_isempty(argv), -EINVAL); | |
234 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
235 | |
236 | p = strdup(path); | |
237 | if (!p) | |
238 | return -ENOMEM; | |
239 | ||
240 | a = strv_copy(argv); | |
241 | if (!a) { | |
242 | free(p); | |
243 | return -ENOMEM; | |
244 | } | |
245 | ||
246 | free(bus->exec_path); | |
247 | strv_free(bus->exec_argv); | |
248 | ||
249 | bus->exec_path = p; | |
250 | bus->exec_argv = a; | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
d9f644e2 | 255 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
256 | assert_return(bus, -EINVAL); |
257 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
258 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 259 | |
94bbf1ba | 260 | bus->bus_client = !!b; |
021a1e78 LP |
261 | return 0; |
262 | } | |
263 | ||
09365592 LP |
264 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
265 | assert_return(bus, -EINVAL); | |
266 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
267 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
268 | ||
269 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
270 | return 0; | |
271 | } | |
272 | ||
d9f644e2 | 273 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
274 | assert_return(bus, -EINVAL); |
275 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
276 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 277 | |
264ad849 LP |
278 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
279 | return 0; | |
280 | } | |
281 | ||
4fc31988 | 282 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 283 | uint64_t new_flags; |
16be4368 | 284 | assert_return(bus, -EINVAL); |
b5dae4c7 | 285 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
286 | assert_return(!bus_pid_changed(bus), -ECHILD); |
287 | ||
b5dae4c7 LP |
288 | new_flags = bus->attach_flags; |
289 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
290 | ||
291 | if (bus->attach_flags == new_flags) | |
292 | return 0; | |
293 | ||
294 | bus->attach_flags = new_flags; | |
295 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
296 | bus_kernel_realize_attach_flags(bus); | |
297 | ||
16be4368 KS |
298 | return 0; |
299 | } | |
300 | ||
b5dae4c7 LP |
301 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
302 | uint64_t new_flags; | |
303 | ||
16be4368 | 304 | assert_return(bus, -EINVAL); |
95c4fe82 | 305 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 306 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
307 | assert_return(!bus_pid_changed(bus), -ECHILD); |
308 | ||
b5dae4c7 LP |
309 | if (b) |
310 | bus->creds_mask |= mask; | |
311 | else | |
312 | bus->creds_mask &= ~mask; | |
313 | ||
49b832c5 | 314 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
315 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
316 | ||
317 | /* Make sure we don't lose the timestamp flag */ | |
318 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
319 | if (bus->attach_flags == new_flags) | |
320 | return 0; | |
49b832c5 | 321 | |
b5dae4c7 LP |
322 | bus->attach_flags = new_flags; |
323 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
324 | bus_kernel_realize_attach_flags(bus); | |
325 | ||
326 | return 0; | |
021a1e78 | 327 | } |
de1c301e | 328 | |
d9f644e2 | 329 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
330 | assert_return(bus, -EINVAL); |
331 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
332 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
333 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
334 | |
335 | bus->is_server = !!b; | |
98178d39 | 336 | bus->server_id = server_id; |
2181a7f5 LP |
337 | return 0; |
338 | } | |
339 | ||
d9f644e2 | 340 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
341 | assert_return(bus, -EINVAL); |
342 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
343 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
344 | |
345 | bus->anonymous_auth = !!b; | |
346 | return 0; | |
347 | } | |
348 | ||
adacb957 LP |
349 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
350 | assert_return(bus, -EINVAL); | |
351 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
352 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
353 | ||
354 | bus->trusted = !!b; | |
355 | return 0; | |
356 | } | |
357 | ||
455971c1 | 358 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 359 | assert_return(bus, -EINVAL); |
5972fe95 LP |
360 | assert_return(bus->state == BUS_UNSET, -EPERM); |
361 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
362 | ||
d1b91c99 | 363 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
364 | } |
365 | ||
c0765ddb LP |
366 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
367 | assert_return(bus, -EINVAL); | |
368 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
369 | ||
370 | bus->allow_interactive_authorization = !!b; | |
371 | return 0; | |
372 | } | |
373 | ||
374 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
375 | assert_return(bus, -EINVAL); | |
376 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
377 | ||
378 | return bus->allow_interactive_authorization; | |
379 | } | |
380 | ||
19070062 | 381 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 382 | const char *s; |
19070062 | 383 | sd_bus *bus; |
de1c301e LP |
384 | int r; |
385 | ||
19070062 LP |
386 | assert(reply); |
387 | bus = reply->bus; | |
de1c301e | 388 | assert(bus); |
c99c09a2 | 389 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e | 390 | |
40ca29a1 | 391 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
392 | if (r > 0) |
393 | return -r; | |
eb01ba5d | 394 | |
de1c301e LP |
395 | r = sd_bus_message_read(reply, "s", &s); |
396 | if (r < 0) | |
397 | return r; | |
398 | ||
dafb7591 LP |
399 | if (!service_name_is_valid(s) || s[0] != ':') |
400 | return -EBADMSG; | |
401 | ||
de1c301e LP |
402 | bus->unique_name = strdup(s); |
403 | if (!bus->unique_name) | |
404 | return -ENOMEM; | |
405 | ||
c99c09a2 LP |
406 | if (bus->state == BUS_HELLO) |
407 | bus->state = BUS_RUNNING; | |
dafb7591 | 408 | |
de1c301e LP |
409 | return 1; |
410 | } | |
411 | ||
412 | static int bus_send_hello(sd_bus *bus) { | |
413 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
414 | int r; | |
415 | ||
416 | assert(bus); | |
417 | ||
6629161f | 418 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
419 | return 0; |
420 | ||
de1c301e LP |
421 | r = sd_bus_message_new_method_call( |
422 | bus, | |
151b9b96 | 423 | &m, |
de1c301e | 424 | "org.freedesktop.DBus", |
a7639e37 | 425 | "/org/freedesktop/DBus", |
de1c301e | 426 | "org.freedesktop.DBus", |
151b9b96 | 427 | "Hello"); |
de1c301e LP |
428 | if (r < 0) |
429 | return r; | |
430 | ||
19befb2d | 431 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
432 | } |
433 | ||
a7e3212d | 434 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
435 | assert(bus); |
436 | ||
f08838da | 437 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 438 | bus->state = BUS_HELLO; |
e3017af9 | 439 | return 1; |
de1c301e LP |
440 | } |
441 | ||
442 | bus->state = BUS_RUNNING; | |
e3017af9 | 443 | return 1; |
de1c301e LP |
444 | } |
445 | ||
446 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 447 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
448 | const char *a; |
449 | char *r = NULL; | |
450 | ||
451 | assert(p); | |
452 | assert(*p); | |
de1c301e LP |
453 | assert(value); |
454 | ||
2fd9ae2e LP |
455 | if (key) { |
456 | l = strlen(key); | |
457 | if (strncmp(*p, key, l) != 0) | |
458 | return 0; | |
de1c301e | 459 | |
2fd9ae2e LP |
460 | if ((*p)[l] != '=') |
461 | return 0; | |
de1c301e | 462 | |
2fd9ae2e LP |
463 | if (*value) |
464 | return -EINVAL; | |
de1c301e | 465 | |
2fd9ae2e LP |
466 | a = *p + l + 1; |
467 | } else | |
468 | a = *p; | |
469 | ||
470 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 471 | char c; |
de1c301e LP |
472 | |
473 | if (*a == '%') { | |
474 | int x, y; | |
475 | ||
476 | x = unhexchar(a[1]); | |
477 | if (x < 0) { | |
478 | free(r); | |
479 | return x; | |
480 | } | |
481 | ||
482 | y = unhexchar(a[2]); | |
483 | if (y < 0) { | |
484 | free(r); | |
485 | return y; | |
486 | } | |
487 | ||
de1c301e | 488 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
489 | a += 3; |
490 | } else { | |
de1c301e | 491 | c = *a; |
89ffcd2a LP |
492 | a++; |
493 | } | |
de1c301e | 494 | |
821e0756 | 495 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 496 | return -ENOMEM; |
de1c301e | 497 | |
de1c301e LP |
498 | r[n++] = c; |
499 | } | |
500 | ||
89ffcd2a LP |
501 | if (!r) { |
502 | r = strdup(""); | |
503 | if (!r) | |
504 | return -ENOMEM; | |
505 | } else | |
506 | r[n] = 0; | |
507 | ||
508 | if (*a == ',') | |
509 | a++; | |
510 | ||
de1c301e | 511 | *p = a; |
2fd9ae2e LP |
512 | |
513 | free(*value); | |
de1c301e | 514 | *value = r; |
2fd9ae2e | 515 | |
de1c301e LP |
516 | return 1; |
517 | } | |
518 | ||
519 | static void skip_address_key(const char **p) { | |
520 | assert(p); | |
521 | assert(*p); | |
522 | ||
89ffcd2a LP |
523 | *p += strcspn(*p, ","); |
524 | ||
525 | if (**p == ',') | |
526 | (*p) ++; | |
de1c301e LP |
527 | } |
528 | ||
2fd9ae2e LP |
529 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
530 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
531 | size_t l; | |
de1c301e LP |
532 | int r; |
533 | ||
534 | assert(b); | |
2fd9ae2e LP |
535 | assert(p); |
536 | assert(*p); | |
537 | assert(guid); | |
de1c301e | 538 | |
2fd9ae2e LP |
539 | while (**p != 0 && **p != ';') { |
540 | r = parse_address_key(p, "guid", guid); | |
541 | if (r < 0) | |
542 | return r; | |
543 | else if (r > 0) | |
544 | continue; | |
de1c301e | 545 | |
2fd9ae2e LP |
546 | r = parse_address_key(p, "path", &path); |
547 | if (r < 0) | |
548 | return r; | |
549 | else if (r > 0) | |
550 | continue; | |
de1c301e | 551 | |
2fd9ae2e LP |
552 | r = parse_address_key(p, "abstract", &abstract); |
553 | if (r < 0) | |
554 | return r; | |
555 | else if (r > 0) | |
556 | continue; | |
de1c301e | 557 | |
2fd9ae2e LP |
558 | skip_address_key(p); |
559 | } | |
de1c301e | 560 | |
2fd9ae2e LP |
561 | if (!path && !abstract) |
562 | return -EINVAL; | |
de1c301e | 563 | |
2fd9ae2e LP |
564 | if (path && abstract) |
565 | return -EINVAL; | |
566 | ||
567 | if (path) { | |
568 | l = strlen(path); | |
569 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
570 | return -E2BIG; | |
de1c301e | 571 | |
2fd9ae2e LP |
572 | b->sockaddr.un.sun_family = AF_UNIX; |
573 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
574 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
575 | } else if (abstract) { | |
576 | l = strlen(abstract); | |
577 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
578 | return -E2BIG; | |
579 | ||
580 | b->sockaddr.un.sun_family = AF_UNIX; | |
581 | b->sockaddr.un.sun_path[0] = 0; | |
582 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
583 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
584 | } | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
590 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 591 | int r; |
b92bea5d ZJS |
592 | struct addrinfo *result, hints = { |
593 | .ai_socktype = SOCK_STREAM, | |
594 | .ai_flags = AI_ADDRCONFIG, | |
595 | }; | |
2fd9ae2e LP |
596 | |
597 | assert(b); | |
598 | assert(p); | |
599 | assert(*p); | |
600 | assert(guid); | |
601 | ||
602 | while (**p != 0 && **p != ';') { | |
603 | r = parse_address_key(p, "guid", guid); | |
604 | if (r < 0) | |
605 | return r; | |
606 | else if (r > 0) | |
607 | continue; | |
608 | ||
609 | r = parse_address_key(p, "host", &host); | |
610 | if (r < 0) | |
611 | return r; | |
612 | else if (r > 0) | |
613 | continue; | |
614 | ||
615 | r = parse_address_key(p, "port", &port); | |
616 | if (r < 0) | |
617 | return r; | |
618 | else if (r > 0) | |
619 | continue; | |
620 | ||
621 | r = parse_address_key(p, "family", &family); | |
622 | if (r < 0) | |
623 | return r; | |
624 | else if (r > 0) | |
625 | continue; | |
626 | ||
627 | skip_address_key(p); | |
628 | } | |
629 | ||
630 | if (!host || !port) | |
631 | return -EINVAL; | |
632 | ||
2fd9ae2e LP |
633 | if (family) { |
634 | if (streq(family, "ipv4")) | |
635 | hints.ai_family = AF_INET; | |
636 | else if (streq(family, "ipv6")) | |
637 | hints.ai_family = AF_INET6; | |
638 | else | |
639 | return -EINVAL; | |
640 | } | |
641 | ||
642 | r = getaddrinfo(host, port, &hints, &result); | |
643 | if (r == EAI_SYSTEM) | |
644 | return -errno; | |
645 | else if (r != 0) | |
646 | return -EADDRNOTAVAIL; | |
647 | ||
648 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
649 | b->sockaddr_size = result->ai_addrlen; | |
650 | ||
651 | freeaddrinfo(result); | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
656 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
657 | char *path = NULL; | |
658 | unsigned n_argv = 0, j; | |
659 | char **argv = NULL; | |
821e0756 | 660 | size_t allocated = 0; |
2fd9ae2e LP |
661 | int r; |
662 | ||
663 | assert(b); | |
664 | assert(p); | |
665 | assert(*p); | |
666 | assert(guid); | |
667 | ||
668 | while (**p != 0 && **p != ';') { | |
669 | r = parse_address_key(p, "guid", guid); | |
670 | if (r < 0) | |
671 | goto fail; | |
672 | else if (r > 0) | |
673 | continue; | |
674 | ||
675 | r = parse_address_key(p, "path", &path); | |
676 | if (r < 0) | |
677 | goto fail; | |
678 | else if (r > 0) | |
679 | continue; | |
680 | ||
681 | if (startswith(*p, "argv")) { | |
682 | unsigned ul; | |
683 | ||
684 | errno = 0; | |
685 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 686 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
687 | r = -EINVAL; |
688 | goto fail; | |
689 | } | |
690 | ||
691 | (*p) ++; | |
692 | ||
693 | if (ul >= n_argv) { | |
821e0756 | 694 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
695 | r = -ENOMEM; |
696 | goto fail; | |
697 | } | |
698 | ||
2fd9ae2e LP |
699 | n_argv = ul + 1; |
700 | } | |
701 | ||
702 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 703 | if (r < 0) |
2fd9ae2e | 704 | goto fail; |
de1c301e | 705 | |
2fd9ae2e | 706 | continue; |
de1c301e LP |
707 | } |
708 | ||
2fd9ae2e LP |
709 | skip_address_key(p); |
710 | } | |
de1c301e | 711 | |
5a0f6033 LP |
712 | if (!path) { |
713 | r = -EINVAL; | |
2fd9ae2e | 714 | goto fail; |
5a0f6033 | 715 | } |
de1c301e | 716 | |
2fd9ae2e LP |
717 | /* Make sure there are no holes in the array, with the |
718 | * exception of argv[0] */ | |
719 | for (j = 1; j < n_argv; j++) | |
720 | if (!argv[j]) { | |
721 | r = -EINVAL; | |
722 | goto fail; | |
723 | } | |
724 | ||
725 | if (argv && argv[0] == NULL) { | |
726 | argv[0] = strdup(path); | |
727 | if (!argv[0]) { | |
728 | r = -ENOMEM; | |
729 | goto fail; | |
730 | } | |
731 | } | |
de1c301e | 732 | |
2fd9ae2e LP |
733 | b->exec_path = path; |
734 | b->exec_argv = argv; | |
735 | return 0; | |
de1c301e | 736 | |
2fd9ae2e LP |
737 | fail: |
738 | for (j = 0; j < n_argv; j++) | |
739 | free(argv[j]); | |
740 | ||
741 | free(argv); | |
742 | free(path); | |
743 | return r; | |
744 | } | |
745 | ||
6629161f LP |
746 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
747 | _cleanup_free_ char *path = NULL; | |
748 | int r; | |
749 | ||
750 | assert(b); | |
751 | assert(p); | |
752 | assert(*p); | |
753 | assert(guid); | |
754 | ||
755 | while (**p != 0 && **p != ';') { | |
756 | r = parse_address_key(p, "guid", guid); | |
757 | if (r < 0) | |
758 | return r; | |
759 | else if (r > 0) | |
760 | continue; | |
761 | ||
762 | r = parse_address_key(p, "path", &path); | |
763 | if (r < 0) | |
764 | return r; | |
765 | else if (r > 0) | |
766 | continue; | |
767 | ||
768 | skip_address_key(p); | |
769 | } | |
770 | ||
771 | if (!path) | |
772 | return -EINVAL; | |
773 | ||
774 | free(b->kernel); | |
775 | b->kernel = path; | |
776 | path = NULL; | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
bc9fd78c | 781 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 782 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
783 | int r; |
784 | ||
785 | assert(b); | |
786 | assert(p); | |
787 | assert(*p); | |
788 | assert(guid); | |
789 | ||
790 | while (**p != 0 && **p != ';') { | |
791 | r = parse_address_key(p, "guid", guid); | |
792 | if (r < 0) | |
793 | return r; | |
794 | else if (r > 0) | |
795 | continue; | |
796 | ||
797 | r = parse_address_key(p, "machine", &machine); | |
798 | if (r < 0) | |
799 | return r; | |
800 | else if (r > 0) | |
801 | continue; | |
802 | ||
ee502e0c LP |
803 | r = parse_address_key(p, "pid", &pid); |
804 | if (r < 0) | |
805 | return r; | |
806 | else if (r > 0) | |
807 | continue; | |
808 | ||
a7893c6b LP |
809 | skip_address_key(p); |
810 | } | |
811 | ||
ee502e0c | 812 | if (!machine == !pid) |
a7893c6b LP |
813 | return -EINVAL; |
814 | ||
ee502e0c LP |
815 | if (machine) { |
816 | if (!machine_name_is_valid(machine)) | |
817 | return -EINVAL; | |
b6741478 | 818 | |
ee502e0c LP |
819 | free(b->machine); |
820 | b->machine = machine; | |
821 | machine = NULL; | |
822 | } else { | |
823 | free(b->machine); | |
824 | b->machine = NULL; | |
825 | } | |
826 | ||
827 | if (pid) { | |
828 | r = parse_pid(pid, &b->nspid); | |
829 | if (r < 0) | |
830 | return r; | |
831 | } else | |
832 | b->nspid = 0; | |
a7893c6b LP |
833 | |
834 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
835 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
836 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
837 | |
838 | return 0; | |
839 | } | |
840 | ||
bc9fd78c | 841 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 842 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
843 | int r; |
844 | ||
845 | assert(b); | |
846 | assert(p); | |
847 | assert(*p); | |
848 | assert(guid); | |
849 | ||
850 | while (**p != 0 && **p != ';') { | |
851 | r = parse_address_key(p, "guid", guid); | |
852 | if (r < 0) | |
853 | return r; | |
854 | else if (r > 0) | |
855 | continue; | |
856 | ||
857 | r = parse_address_key(p, "machine", &machine); | |
858 | if (r < 0) | |
859 | return r; | |
860 | else if (r > 0) | |
861 | continue; | |
862 | ||
ee502e0c LP |
863 | r = parse_address_key(p, "pid", &pid); |
864 | if (r < 0) | |
865 | return r; | |
866 | else if (r > 0) | |
867 | continue; | |
868 | ||
bc9fd78c LP |
869 | skip_address_key(p); |
870 | } | |
871 | ||
ee502e0c | 872 | if (!machine == !pid) |
bc9fd78c LP |
873 | return -EINVAL; |
874 | ||
ee502e0c LP |
875 | if (machine) { |
876 | if (!machine_name_is_valid(machine)) | |
877 | return -EINVAL; | |
bc9fd78c | 878 | |
ee502e0c LP |
879 | free(b->machine); |
880 | b->machine = machine; | |
881 | machine = NULL; | |
882 | } else { | |
883 | free(b->machine); | |
884 | b->machine = NULL; | |
885 | } | |
886 | ||
887 | if (pid) { | |
888 | r = parse_pid(pid, &b->nspid); | |
889 | if (r < 0) | |
890 | return r; | |
891 | } else | |
892 | b->nspid = 0; | |
bc9fd78c | 893 | |
2fc09a9c DM |
894 | r = free_and_strdup(&b->kernel, "/sys/fs/kdbus/0-system/bus"); |
895 | if (r < 0) | |
896 | return r; | |
bc9fd78c LP |
897 | |
898 | return 0; | |
899 | } | |
900 | ||
2fd9ae2e LP |
901 | static void bus_reset_parsed_address(sd_bus *b) { |
902 | assert(b); | |
903 | ||
904 | zero(b->sockaddr); | |
905 | b->sockaddr_size = 0; | |
ba243e51 NK |
906 | b->exec_argv = strv_free(b->exec_argv); |
907 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 908 | b->server_id = SD_ID128_NULL; |
ba243e51 NK |
909 | b->kernel = mfree(b->kernel); |
910 | b->machine = mfree(b->machine); | |
ee502e0c | 911 | b->nspid = 0; |
2fd9ae2e LP |
912 | } |
913 | ||
914 | static int bus_parse_next_address(sd_bus *b) { | |
915 | _cleanup_free_ char *guid = NULL; | |
916 | const char *a; | |
917 | int r; | |
918 | ||
919 | assert(b); | |
920 | ||
921 | if (!b->address) | |
922 | return 0; | |
923 | if (b->address[b->address_index] == 0) | |
924 | return 0; | |
925 | ||
926 | bus_reset_parsed_address(b); | |
927 | ||
928 | a = b->address + b->address_index; | |
de1c301e | 929 | |
2fd9ae2e | 930 | while (*a != 0) { |
de1c301e | 931 | |
2fd9ae2e LP |
932 | if (*a == ';') { |
933 | a++; | |
934 | continue; | |
de1c301e LP |
935 | } |
936 | ||
2fd9ae2e LP |
937 | if (startswith(a, "unix:")) { |
938 | a += 5; | |
de1c301e | 939 | |
2fd9ae2e | 940 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
941 | if (r < 0) |
942 | return r; | |
2fd9ae2e | 943 | break; |
de1c301e | 944 | |
2fd9ae2e | 945 | } else if (startswith(a, "tcp:")) { |
de1c301e | 946 | |
2fd9ae2e LP |
947 | a += 4; |
948 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
949 | if (r < 0) |
950 | return r; | |
de1c301e | 951 | |
2fd9ae2e LP |
952 | break; |
953 | ||
954 | } else if (startswith(a, "unixexec:")) { | |
955 | ||
956 | a += 9; | |
957 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
958 | if (r < 0) |
959 | return r; | |
de1c301e | 960 | |
2fd9ae2e | 961 | break; |
de1c301e | 962 | |
6629161f LP |
963 | } else if (startswith(a, "kernel:")) { |
964 | ||
965 | a += 7; | |
966 | r = parse_kernel_address(b, &a, &guid); | |
967 | if (r < 0) | |
968 | return r; | |
969 | ||
a7893c6b | 970 | break; |
de33fc62 | 971 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 972 | |
146d4773 | 973 | a += 15; |
bc9fd78c LP |
974 | r = parse_container_unix_address(b, &a, &guid); |
975 | if (r < 0) | |
976 | return r; | |
977 | ||
978 | break; | |
de33fc62 | 979 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 980 | |
146d4773 | 981 | a += 17; |
bc9fd78c | 982 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
983 | if (r < 0) |
984 | return r; | |
985 | ||
6629161f | 986 | break; |
de1c301e LP |
987 | } |
988 | ||
2fd9ae2e LP |
989 | a = strchr(a, ';'); |
990 | if (!a) | |
991 | return 0; | |
de1c301e LP |
992 | } |
993 | ||
994 | if (guid) { | |
98178d39 | 995 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
996 | if (r < 0) |
997 | return r; | |
998 | } | |
999 | ||
2fd9ae2e | 1000 | b->address_index = a - b->address; |
de1c301e LP |
1001 | return 1; |
1002 | } | |
1003 | ||
a7e3212d | 1004 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
1005 | int r; |
1006 | ||
1007 | assert(b); | |
1008 | ||
1009 | for (;;) { | |
1e05d493 | 1010 | bool skipped = false; |
2fd9ae2e | 1011 | |
1e05d493 | 1012 | bus_close_fds(b); |
a7e3212d | 1013 | |
1e05d493 | 1014 | if (b->exec_path) |
a7893c6b | 1015 | r = bus_socket_exec(b); |
ee502e0c | 1016 | else if ((b->nspid > 0 || b->machine) && b->kernel) |
bc9fd78c | 1017 | r = bus_container_connect_kernel(b); |
ee502e0c | 1018 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
bc9fd78c | 1019 | r = bus_container_connect_socket(b); |
1e05d493 | 1020 | else if (b->kernel) |
a7893c6b | 1021 | r = bus_kernel_connect(b); |
1e05d493 | 1022 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 1023 | r = bus_socket_connect(b); |
1e05d493 LP |
1024 | else |
1025 | skipped = true; | |
1026 | ||
1027 | if (!skipped) { | |
1028 | if (r >= 0) { | |
1029 | r = attach_io_events(b); | |
1030 | if (r >= 0) | |
1031 | return r; | |
1032 | } | |
6629161f | 1033 | |
2fd9ae2e LP |
1034 | b->last_connect_error = -r; |
1035 | } | |
1036 | ||
1037 | r = bus_parse_next_address(b); | |
1038 | if (r < 0) | |
1039 | return r; | |
1040 | if (r == 0) | |
1041 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1042 | } |
1043 | } | |
1044 | ||
a7e3212d LP |
1045 | int bus_next_address(sd_bus *b) { |
1046 | assert(b); | |
1047 | ||
1048 | bus_reset_parsed_address(b); | |
1049 | return bus_start_address(b); | |
1050 | } | |
1051 | ||
021a1e78 | 1052 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1053 | struct stat st; |
021a1e78 LP |
1054 | int r; |
1055 | ||
1056 | assert(b); | |
e82c9509 LP |
1057 | assert(b->input_fd >= 0); |
1058 | assert(b->output_fd >= 0); | |
021a1e78 | 1059 | |
e82c9509 | 1060 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1061 | if (r < 0) |
1062 | return r; | |
1063 | ||
e82c9509 | 1064 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1065 | if (r < 0) |
1066 | return r; | |
1067 | ||
e82c9509 LP |
1068 | if (b->input_fd != b->output_fd) { |
1069 | r = fd_nonblock(b->output_fd, true); | |
1070 | if (r < 0) | |
1071 | return r; | |
1072 | ||
1073 | r = fd_cloexec(b->output_fd, true); | |
1074 | if (r < 0) | |
1075 | return r; | |
1076 | } | |
1077 | ||
6629161f LP |
1078 | if (fstat(b->input_fd, &st) < 0) |
1079 | return -errno; | |
1080 | ||
1081 | if (S_ISCHR(b->input_fd)) | |
1082 | return bus_kernel_take_fd(b); | |
1083 | else | |
1084 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1085 | } |
1086 | ||
d9f644e2 | 1087 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1088 | int r; |
1089 | ||
d6888822 LP |
1090 | assert_return(bus, -EINVAL); |
1091 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1092 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1093 | |
1094 | bus->state = BUS_OPENING; | |
1095 | ||
2181a7f5 LP |
1096 | if (bus->is_server && bus->bus_client) |
1097 | return -EINVAL; | |
1098 | ||
e82c9509 | 1099 | if (bus->input_fd >= 0) |
021a1e78 | 1100 | r = bus_start_fd(bus); |
a7893c6b | 1101 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1102 | r = bus_start_address(bus); |
021a1e78 LP |
1103 | else |
1104 | return -EINVAL; | |
1105 | ||
db9bb83f LP |
1106 | if (r < 0) { |
1107 | sd_bus_close(bus); | |
021a1e78 | 1108 | return r; |
db9bb83f | 1109 | } |
021a1e78 LP |
1110 | |
1111 | return bus_send_hello(bus); | |
1112 | } | |
1113 | ||
af08d2f9 LP |
1114 | _public_ int sd_bus_open(sd_bus **ret) { |
1115 | const char *e; | |
1116 | sd_bus *b; | |
1117 | int r; | |
1118 | ||
1119 | assert_return(ret, -EINVAL); | |
1120 | ||
1121 | /* Let's connect to the starter bus if it is set, and | |
1122 | * otherwise to the bus that is appropropriate for the scope | |
1123 | * we are running in */ | |
1124 | ||
1125 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1126 | if (e) { | |
1127 | if (streq(e, "system")) | |
1128 | return sd_bus_open_system(ret); | |
09365592 | 1129 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1130 | return sd_bus_open_user(ret); |
1131 | } | |
1132 | ||
1133 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1134 | if (!e) { | |
1135 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1136 | return sd_bus_open_user(ret); | |
1137 | else | |
1138 | return sd_bus_open_system(ret); | |
1139 | } | |
1140 | ||
1141 | r = sd_bus_new(&b); | |
1142 | if (r < 0) | |
1143 | return r; | |
1144 | ||
1145 | r = sd_bus_set_address(b, e); | |
1146 | if (r < 0) | |
1147 | goto fail; | |
1148 | ||
1149 | b->bus_client = true; | |
1150 | ||
1151 | /* We don't know whether the bus is trusted or not, so better | |
1152 | * be safe, and authenticate everything */ | |
1153 | b->trusted = false; | |
cf226cfc LP |
1154 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1155 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1156 | |
1157 | r = sd_bus_start(b); | |
1158 | if (r < 0) | |
1159 | goto fail; | |
1160 | ||
1161 | *ret = b; | |
1162 | return 0; | |
1163 | ||
1164 | fail: | |
1165 | bus_free(b); | |
1166 | return r; | |
1167 | } | |
1168 | ||
09365592 | 1169 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1170 | const char *e; |
09365592 LP |
1171 | assert(b); |
1172 | ||
1173 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1174 | if (e) | |
1175 | return sd_bus_set_address(b, e); | |
1176 | ||
057171ef | 1177 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1178 | } |
1179 | ||
1180 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1181 | sd_bus *b; |
1182 | int r; | |
1183 | ||
d6888822 | 1184 | assert_return(ret, -EINVAL); |
de1c301e | 1185 | |
021a1e78 LP |
1186 | r = sd_bus_new(&b); |
1187 | if (r < 0) | |
1188 | return r; | |
1189 | ||
09365592 | 1190 | r = bus_set_address_system(b); |
e3dd987c LP |
1191 | if (r < 0) |
1192 | goto fail; | |
de1c301e | 1193 | |
94bbf1ba | 1194 | b->bus_client = true; |
5972fe95 | 1195 | b->is_system = true; |
021a1e78 | 1196 | |
adacb957 LP |
1197 | /* Let's do per-method access control on the system bus. We |
1198 | * need the caller's UID and capability set for that. */ | |
1199 | b->trusted = false; | |
1200 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1201 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1202 | |
021a1e78 LP |
1203 | r = sd_bus_start(b); |
1204 | if (r < 0) | |
1205 | goto fail; | |
de1c301e LP |
1206 | |
1207 | *ret = b; | |
1208 | return 0; | |
021a1e78 LP |
1209 | |
1210 | fail: | |
1211 | bus_free(b); | |
1212 | return r; | |
de1c301e LP |
1213 | } |
1214 | ||
09365592 | 1215 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1216 | const char *e; |
de1c301e | 1217 | |
09365592 | 1218 | assert(b); |
021a1e78 | 1219 | |
6c03089c | 1220 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1221 | if (e) |
1222 | return sd_bus_set_address(b, e); | |
1223 | ||
1224 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
057171ef | 1225 | if (e) { |
09365592 | 1226 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1227 | |
09365592 LP |
1228 | ee = bus_address_escape(e); |
1229 | if (!ee) | |
1230 | return -ENOMEM; | |
e3dd987c | 1231 | |
057171ef DH |
1232 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee); |
1233 | } else | |
1234 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()); | |
de1c301e | 1235 | |
09365592 LP |
1236 | if (!b->address) |
1237 | return -ENOMEM; | |
1238 | ||
1239 | return 0; | |
1240 | } | |
1241 | ||
1242 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1243 | sd_bus *b; | |
1244 | int r; | |
1245 | ||
1246 | assert_return(ret, -EINVAL); | |
1247 | ||
1248 | r = sd_bus_new(&b); | |
1249 | if (r < 0) | |
1250 | return r; | |
1251 | ||
1252 | r = bus_set_address_user(b); | |
1253 | if (r < 0) | |
1254 | return r; | |
1255 | ||
94bbf1ba | 1256 | b->bus_client = true; |
5972fe95 | 1257 | b->is_user = true; |
de1c301e | 1258 | |
adacb957 LP |
1259 | /* We don't do any per-method access control on the user |
1260 | * bus. */ | |
1261 | b->trusted = true; | |
1262 | ||
021a1e78 | 1263 | r = sd_bus_start(b); |
2571ead1 LP |
1264 | if (r < 0) |
1265 | goto fail; | |
de1c301e LP |
1266 | |
1267 | *ret = b; | |
1268 | return 0; | |
2571ead1 LP |
1269 | |
1270 | fail: | |
021a1e78 | 1271 | bus_free(b); |
2571ead1 | 1272 | return r; |
de1c301e LP |
1273 | } |
1274 | ||
09365592 | 1275 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1276 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1277 | char *m = NULL, *c = NULL; |
0f8bd8de | 1278 | |
09365592 LP |
1279 | assert(b); |
1280 | assert(host); | |
0f8bd8de | 1281 | |
7f0d207d LP |
1282 | /* Let's see if we shall enter some container */ |
1283 | m = strchr(host, ':'); | |
1284 | if (m) { | |
1285 | m++; | |
1286 | ||
1287 | /* Let's make sure this is not a port of some kind, | |
1288 | * and is a valid machine name. */ | |
1289 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1290 | char *t; | |
1291 | ||
1292 | /* Cut out the host part */ | |
1293 | t = strndupa(host, m - host - 1); | |
1294 | e = bus_address_escape(t); | |
1295 | if (!e) | |
1296 | return -ENOMEM; | |
1297 | ||
63c372cb | 1298 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1299 | } |
1300 | } | |
1301 | ||
1302 | if (!e) { | |
1303 | e = bus_address_escape(host); | |
1304 | if (!e) | |
1305 | return -ENOMEM; | |
1306 | } | |
0f8bd8de | 1307 | |
7f0d207d | 1308 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1309 | if (!b->address) |
0f8bd8de | 1310 | return -ENOMEM; |
a7893c6b | 1311 | |
09365592 LP |
1312 | return 0; |
1313 | } | |
1314 | ||
1315 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1316 | sd_bus *bus; | |
1317 | int r; | |
1318 | ||
1319 | assert_return(host, -EINVAL); | |
1320 | assert_return(ret, -EINVAL); | |
1321 | ||
a7893c6b | 1322 | r = sd_bus_new(&bus); |
09365592 | 1323 | if (r < 0) |
a7893c6b | 1324 | return r; |
a7893c6b | 1325 | |
09365592 LP |
1326 | r = bus_set_address_system_remote(bus, host); |
1327 | if (r < 0) | |
1328 | goto fail; | |
1329 | ||
a7893c6b | 1330 | bus->bus_client = true; |
09365592 | 1331 | bus->trusted = false; |
3acc1daf | 1332 | bus->is_system = true; |
a7893c6b LP |
1333 | |
1334 | r = sd_bus_start(bus); | |
09365592 LP |
1335 | if (r < 0) |
1336 | goto fail; | |
a7893c6b LP |
1337 | |
1338 | *ret = bus; | |
1339 | return 0; | |
09365592 LP |
1340 | |
1341 | fail: | |
1342 | bus_free(bus); | |
1343 | return r; | |
a7893c6b LP |
1344 | } |
1345 | ||
de33fc62 | 1346 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1347 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1348 | |
09365592 LP |
1349 | assert(b); |
1350 | assert(machine); | |
a7893c6b LP |
1351 | |
1352 | e = bus_address_escape(machine); | |
1353 | if (!e) | |
1354 | return -ENOMEM; | |
1355 | ||
de33fc62 | 1356 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
09365592 | 1357 | if (!b->address) |
a7893c6b | 1358 | return -ENOMEM; |
0f8bd8de | 1359 | |
09365592 LP |
1360 | return 0; |
1361 | } | |
1362 | ||
de33fc62 | 1363 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1364 | sd_bus *bus; |
1365 | int r; | |
1366 | ||
1367 | assert_return(machine, -EINVAL); | |
1368 | assert_return(ret, -EINVAL); | |
affcf189 | 1369 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1370 | |
0f8bd8de | 1371 | r = sd_bus_new(&bus); |
09365592 | 1372 | if (r < 0) |
0f8bd8de | 1373 | return r; |
0f8bd8de | 1374 | |
de33fc62 | 1375 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1376 | if (r < 0) |
1377 | goto fail; | |
1378 | ||
0f8bd8de | 1379 | bus->bus_client = true; |
09365592 | 1380 | bus->trusted = false; |
3acc1daf | 1381 | bus->is_system = true; |
0f8bd8de LP |
1382 | |
1383 | r = sd_bus_start(bus); | |
09365592 LP |
1384 | if (r < 0) |
1385 | goto fail; | |
0f8bd8de LP |
1386 | |
1387 | *ret = bus; | |
1388 | return 0; | |
09365592 LP |
1389 | |
1390 | fail: | |
1391 | bus_free(bus); | |
1392 | return r; | |
0f8bd8de LP |
1393 | } |
1394 | ||
d9f644e2 | 1395 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1396 | |
de1c301e LP |
1397 | if (!bus) |
1398 | return; | |
d5a2b9a6 LP |
1399 | if (bus->state == BUS_CLOSED) |
1400 | return; | |
1401 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1402 | return; |
1403 | ||
1404 | bus->state = BUS_CLOSED; | |
e82c9509 | 1405 | |
40ca29a1 LP |
1406 | sd_bus_detach_event(bus); |
1407 | ||
0e586eae LP |
1408 | /* Drop all queued messages so that they drop references to |
1409 | * the bus object and the bus may be freed */ | |
1410 | bus_reset_queues(bus); | |
1411 | ||
f54514f3 LP |
1412 | if (!bus->is_kernel) |
1413 | bus_close_fds(bus); | |
1414 | ||
1415 | /* We'll leave the fd open in case this is a kernel bus, since | |
1416 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1417 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1418 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1419 | } |
1420 | ||
03976f7b LP |
1421 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1422 | ||
1423 | if (!bus) | |
1424 | return NULL; | |
1425 | ||
1426 | sd_bus_flush(bus); | |
1427 | sd_bus_close(bus); | |
1428 | ||
1429 | return sd_bus_unref(bus); | |
1430 | } | |
1431 | ||
718db961 LP |
1432 | static void bus_enter_closing(sd_bus *bus) { |
1433 | assert(bus); | |
1434 | ||
1435 | if (bus->state != BUS_OPENING && | |
1436 | bus->state != BUS_AUTHENTICATING && | |
1437 | bus->state != BUS_HELLO && | |
1438 | bus->state != BUS_RUNNING) | |
1439 | return; | |
1440 | ||
1441 | bus->state = BUS_CLOSING; | |
1442 | } | |
1443 | ||
d9f644e2 | 1444 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1445 | assert_return(bus, NULL); |
de1c301e | 1446 | |
e4ee6e5c | 1447 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1448 | |
de1c301e LP |
1449 | return bus; |
1450 | } | |
1451 | ||
d9f644e2 | 1452 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1453 | unsigned i; |
5b1bc83f LP |
1454 | |
1455 | if (!bus) | |
1456 | return NULL; | |
de1c301e | 1457 | |
f389bf15 LP |
1458 | i = REFCNT_DEC(bus->n_ref); |
1459 | if (i > 0) | |
1460 | return NULL; | |
1461 | ||
1462 | bus_free(bus); | |
de1c301e LP |
1463 | return NULL; |
1464 | } | |
1465 | ||
d9f644e2 | 1466 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1467 | |
1468 | assert_return(bus, -EINVAL); | |
1469 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1470 | |
f54514f3 | 1471 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1472 | } |
1473 | ||
d9f644e2 | 1474 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1475 | int r; |
1476 | ||
d6888822 LP |
1477 | assert_return(bus, -EINVAL); |
1478 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1479 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1480 | |
09365592 LP |
1481 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1482 | return 0; | |
1483 | ||
d728d708 | 1484 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1485 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1486 | return 0; |
1487 | ||
20902f3e | 1488 | r = bus_ensure_running(bus); |
d728d708 LP |
1489 | if (r < 0) |
1490 | return r; | |
de1c301e | 1491 | |
d728d708 LP |
1492 | return bus->can_fds; |
1493 | } | |
1494 | ||
1495 | return bus_type_is_valid(type); | |
de1c301e LP |
1496 | } |
1497 | ||
5c302692 | 1498 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1499 | int r; |
de1c301e | 1500 | |
d6888822 | 1501 | assert_return(bus, -EINVAL); |
f7fce345 | 1502 | assert_return(id, -EINVAL); |
d6888822 | 1503 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1504 | |
20902f3e | 1505 | r = bus_ensure_running(bus); |
d728d708 LP |
1506 | if (r < 0) |
1507 | return r; | |
de1c301e | 1508 | |
f7fce345 | 1509 | *id = bus->server_id; |
d728d708 | 1510 | return 0; |
de1c301e LP |
1511 | } |
1512 | ||
3df7a7e6 | 1513 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1514 | assert(b); |
de1c301e LP |
1515 | assert(m); |
1516 | ||
aea93deb LP |
1517 | if (m->sealed) { |
1518 | /* If we copy the same message to multiple | |
693eb9a2 | 1519 | * destinations, avoid using the same cookie |
aea93deb | 1520 | * numbers. */ |
693eb9a2 | 1521 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1522 | return 0; |
aea93deb | 1523 | } |
de1c301e | 1524 | |
3df7a7e6 LP |
1525 | if (timeout == 0) |
1526 | timeout = BUS_DEFAULT_TIMEOUT; | |
1527 | ||
693eb9a2 | 1528 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1529 | } |
1530 | ||
e1c433c6 | 1531 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1532 | bool remarshal = false; |
1533 | ||
e1c433c6 LP |
1534 | assert(b); |
1535 | ||
908b8a42 DH |
1536 | /* wrong packet version */ |
1537 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1538 | remarshal = true; | |
1539 | ||
1540 | /* wrong packet endianness */ | |
1541 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1542 | remarshal = true; | |
1543 | ||
1544 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1545 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1546 | * force remarshaling of the message. Technically, we could just | |
1547 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1548 | * the message refer to m->kdbus already. This should be fixed! */ | |
1549 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1550 | remarshal = true; | |
e1c433c6 | 1551 | |
908b8a42 | 1552 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1553 | } |
1554 | ||
7adc46fc LP |
1555 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1556 | assert(b); | |
1557 | assert(m); | |
1558 | ||
52cd5877 LP |
1559 | /* Fake some timestamps, if they were requested, and not |
1560 | * already initialized */ | |
1561 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1562 | if (m->realtime <= 0) | |
1563 | m->realtime = now(CLOCK_REALTIME); | |
1564 | ||
1565 | if (m->monotonic <= 0) | |
1566 | m->monotonic = now(CLOCK_MONOTONIC); | |
1567 | } | |
1568 | ||
7adc46fc LP |
1569 | /* The bus specification says the serial number cannot be 0, |
1570 | * hence let's fill something in for synthetic messages. Since | |
1571 | * synthetic messages might have a fake sender and we don't | |
1572 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1573 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1574 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1575 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1576 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1577 | } |
1578 | ||
069f5e61 | 1579 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1580 | int r; |
1581 | ||
718db961 | 1582 | assert(bus); |
2e3db52d | 1583 | assert(m); |
718db961 LP |
1584 | |
1585 | if (bus->is_kernel) | |
069f5e61 | 1586 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1587 | else |
2e3db52d LP |
1588 | r = bus_socket_write_message(bus, m, idx); |
1589 | ||
1590 | if (r <= 0) | |
1591 | return r; | |
1592 | ||
90911bb6 | 1593 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1594 | 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 |
1595 | bus_message_type_to_string(m->header->type), |
1596 | strna(sd_bus_message_get_sender(m)), | |
1597 | strna(sd_bus_message_get_destination(m)), | |
1598 | strna(sd_bus_message_get_path(m)), | |
1599 | strna(sd_bus_message_get_interface(m)), | |
1600 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1601 | BUS_MESSAGE_COOKIE(m), |
1602 | m->reply_cookie, | |
2e3db52d LP |
1603 | strna(m->error.message)); |
1604 | ||
1605 | return r; | |
718db961 LP |
1606 | } |
1607 | ||
de1c301e | 1608 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1609 | int r, ret = 0; |
de1c301e LP |
1610 | |
1611 | assert(bus); | |
89ffcd2a | 1612 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1613 | |
de1c301e LP |
1614 | while (bus->wqueue_size > 0) { |
1615 | ||
069f5e61 | 1616 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1617 | if (r < 0) |
de1c301e | 1618 | return r; |
718db961 | 1619 | else if (r == 0) |
e3017af9 LP |
1620 | /* Didn't do anything this time */ |
1621 | return ret; | |
6629161f | 1622 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1623 | /* Fully written. Let's drop the entry from |
1624 | * the queue. | |
1625 | * | |
1626 | * This isn't particularly optimized, but | |
1627 | * well, this is supposed to be our worst-case | |
1628 | * buffer only, and the socket buffer is | |
1629 | * supposed to be our primary buffer, and if | |
1630 | * it got full, then all bets are off | |
1631 | * anyway. */ | |
1632 | ||
de1c301e | 1633 | bus->wqueue_size --; |
c4e6e242 | 1634 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1635 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1636 | bus->windex = 0; | |
1637 | ||
e3017af9 | 1638 | ret = 1; |
de1c301e LP |
1639 | } |
1640 | } | |
1641 | ||
e3017af9 | 1642 | return ret; |
de1c301e LP |
1643 | } |
1644 | ||
766c5809 | 1645 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1646 | assert(bus); |
1647 | ||
1648 | if (bus->is_kernel) | |
766c5809 | 1649 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1650 | else |
1651 | return bus_socket_read_message(bus); | |
1652 | } | |
1653 | ||
7adc46fc | 1654 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1655 | assert(bus); |
7d22c717 | 1656 | |
821e0756 | 1657 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1658 | return -ENOBUFS; |
1659 | ||
821e0756 | 1660 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1661 | return -ENOMEM; |
1662 | ||
7d22c717 LP |
1663 | return 0; |
1664 | } | |
1665 | ||
766c5809 | 1666 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1667 | int r, ret = 0; |
de1c301e LP |
1668 | |
1669 | assert(bus); | |
1670 | assert(m); | |
89ffcd2a | 1671 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1672 | |
766c5809 LP |
1673 | /* Note that the priority logic is only available on kdbus, |
1674 | * where the rqueue is unused. We check the rqueue here | |
1675 | * anyway, because it's simple... */ | |
1676 | ||
7d22c717 LP |
1677 | for (;;) { |
1678 | if (bus->rqueue_size > 0) { | |
1679 | /* Dispatch a queued message */ | |
de1c301e | 1680 | |
7d22c717 LP |
1681 | *m = bus->rqueue[0]; |
1682 | bus->rqueue_size --; | |
1683 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1684 | return 1; | |
1685 | } | |
de1c301e | 1686 | |
7d22c717 | 1687 | /* Try to read a new message */ |
766c5809 | 1688 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1689 | if (r < 0) |
e3017af9 | 1690 | return r; |
e3017af9 LP |
1691 | if (r == 0) |
1692 | return ret; | |
de1c301e | 1693 | |
2e8d788c | 1694 | ret = 1; |
7d22c717 | 1695 | } |
de1c301e LP |
1696 | } |
1697 | ||
069f5e61 | 1698 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1699 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1700 | int r; |
1701 | ||
d6888822 | 1702 | assert_return(m, -EINVAL); |
9030ca46 LP |
1703 | |
1704 | if (!bus) | |
1705 | bus = m->bus; | |
1706 | ||
d6888822 | 1707 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1708 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1709 | |
a3d59cd1 LP |
1710 | if (!BUS_IS_OPEN(bus->state)) |
1711 | return -ENOTCONN; | |
1712 | ||
021a1e78 LP |
1713 | if (m->n_fds > 0) { |
1714 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1715 | if (r < 0) | |
1716 | return r; | |
1717 | if (r == 0) | |
15411c0c | 1718 | return -EOPNOTSUPP; |
021a1e78 | 1719 | } |
de1c301e | 1720 | |
693eb9a2 | 1721 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1722 | * is expected */ |
693eb9a2 | 1723 | if (!cookie && !m->sealed) |
0461f8cd | 1724 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1725 | |
3df7a7e6 | 1726 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1727 | if (r < 0) |
1728 | return r; | |
1729 | ||
441d56a1 | 1730 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1731 | * message and place a replacement in m */ |
1732 | r = bus_remarshal_message(bus, &m); | |
1733 | if (r < 0) | |
1734 | return r; | |
1735 | ||
5407f2de LP |
1736 | /* If this is a reply and no reply was requested, then let's |
1737 | * suppress this, if we can */ | |
997eadb5 LP |
1738 | if (m->dont_send) |
1739 | goto finish; | |
5407f2de | 1740 | |
89ffcd2a | 1741 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1742 | size_t idx = 0; |
1743 | ||
069f5e61 | 1744 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1745 | if (r < 0) { |
441d56a1 | 1746 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1747 | bus_enter_closing(bus); |
441d56a1 LP |
1748 | return -ECONNRESET; |
1749 | } | |
32f46480 | 1750 | |
de1c301e | 1751 | return r; |
997eadb5 LP |
1752 | } |
1753 | ||
1754 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1755 | /* Wasn't fully written. So let's remember how |
1756 | * much was written. Note that the first entry | |
1757 | * of the wqueue array is always allocated so | |
1758 | * that we always can remember how much was | |
1759 | * written. */ | |
1760 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1761 | bus->wqueue_size = 1; | |
1762 | bus->windex = idx; | |
1763 | } | |
997eadb5 | 1764 | |
de1c301e | 1765 | } else { |
de1c301e LP |
1766 | /* Just append it to the queue. */ |
1767 | ||
25220239 | 1768 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1769 | return -ENOBUFS; |
1770 | ||
821e0756 | 1771 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1772 | return -ENOMEM; |
1773 | ||
821e0756 | 1774 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1775 | } |
1776 | ||
997eadb5 | 1777 | finish: |
693eb9a2 LP |
1778 | if (cookie) |
1779 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1780 | |
7a37d625 | 1781 | return 1; |
de1c301e LP |
1782 | } |
1783 | ||
069f5e61 LP |
1784 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1785 | return bus_send_internal(bus, m, cookie, false); | |
1786 | } | |
1787 | ||
693eb9a2 | 1788 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1789 | int r; |
1790 | ||
911121a7 | 1791 | assert_return(m, -EINVAL); |
9030ca46 LP |
1792 | |
1793 | if (!bus) | |
1794 | bus = m->bus; | |
1795 | ||
911121a7 LP |
1796 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1797 | ||
a3d59cd1 LP |
1798 | if (!BUS_IS_OPEN(bus->state)) |
1799 | return -ENOTCONN; | |
1800 | ||
911121a7 LP |
1801 | if (!streq_ptr(m->destination, destination)) { |
1802 | ||
1803 | if (!destination) | |
1804 | return -EEXIST; | |
1805 | ||
1806 | r = sd_bus_message_set_destination(m, destination); | |
1807 | if (r < 0) | |
1808 | return r; | |
1809 | } | |
1810 | ||
693eb9a2 | 1811 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1812 | } |
1813 | ||
de1c301e LP |
1814 | static usec_t calc_elapse(uint64_t usec) { |
1815 | if (usec == (uint64_t) -1) | |
1816 | return 0; | |
1817 | ||
de1c301e LP |
1818 | return now(CLOCK_MONOTONIC) + usec; |
1819 | } | |
1820 | ||
e3017af9 LP |
1821 | static int timeout_compare(const void *a, const void *b) { |
1822 | const struct reply_callback *x = a, *y = b; | |
1823 | ||
1824 | if (x->timeout != 0 && y->timeout == 0) | |
1825 | return -1; | |
1826 | ||
1827 | if (x->timeout == 0 && y->timeout != 0) | |
1828 | return 1; | |
1829 | ||
1830 | if (x->timeout < y->timeout) | |
1831 | return -1; | |
1832 | ||
1833 | if (x->timeout > y->timeout) | |
1834 | return 1; | |
1835 | ||
1836 | return 0; | |
1837 | } | |
1838 | ||
c49b30a2 | 1839 | _public_ int sd_bus_call_async( |
de1c301e | 1840 | sd_bus *bus, |
19befb2d | 1841 | sd_bus_slot **slot, |
e1c433c6 | 1842 | sd_bus_message *_m, |
52f3ba91 | 1843 | sd_bus_message_handler_t callback, |
de1c301e | 1844 | void *userdata, |
19befb2d | 1845 | uint64_t usec) { |
de1c301e | 1846 | |
e1c433c6 | 1847 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1848 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1849 | int r; |
1850 | ||
d6888822 | 1851 | assert_return(m, -EINVAL); |
40ca29a1 | 1852 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1853 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1854 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1855 | |
1856 | if (!bus) | |
1857 | bus = m->bus; | |
1858 | ||
d6888822 | 1859 | assert_return(!bus_pid_changed(bus), -ECHILD); |
09365592 | 1860 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1861 | |
a3d59cd1 LP |
1862 | if (!BUS_IS_OPEN(bus->state)) |
1863 | return -ENOTCONN; | |
1864 | ||
c9fe4af7 | 1865 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1866 | if (r < 0) |
1867 | return r; | |
de1c301e | 1868 | |
3df7a7e6 LP |
1869 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1870 | if (r < 0) | |
1871 | return r; | |
e3017af9 | 1872 | |
3df7a7e6 | 1873 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1874 | if (r < 0) |
1875 | return r; | |
1876 | ||
e1c433c6 LP |
1877 | r = bus_remarshal_message(bus, &m); |
1878 | if (r < 0) | |
1879 | return r; | |
1880 | ||
19befb2d LP |
1881 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1882 | if (!s) | |
de1c301e LP |
1883 | return -ENOMEM; |
1884 | ||
19befb2d | 1885 | s->reply_callback.callback = callback; |
de1c301e | 1886 | |
19befb2d | 1887 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1888 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1889 | if (r < 0) { |
19befb2d | 1890 | s->reply_callback.cookie = 0; |
de1c301e LP |
1891 | return r; |
1892 | } | |
1893 | ||
19befb2d LP |
1894 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1895 | if (s->reply_callback.timeout != 0) { | |
1896 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1897 | if (r < 0) { |
19befb2d | 1898 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1899 | return r; |
1900 | } | |
1901 | } | |
1902 | ||
19befb2d LP |
1903 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1904 | if (r < 0) | |
de1c301e | 1905 | return r; |
de1c301e | 1906 | |
19befb2d LP |
1907 | if (slot) |
1908 | *slot = s; | |
1909 | s = NULL; | |
e3017af9 | 1910 | |
19befb2d | 1911 | return r; |
de1c301e LP |
1912 | } |
1913 | ||
20902f3e | 1914 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1915 | int r; |
1916 | ||
1917 | assert(bus); | |
1918 | ||
718db961 | 1919 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1920 | return -ENOTCONN; |
d728d708 LP |
1921 | if (bus->state == BUS_RUNNING) |
1922 | return 1; | |
89ffcd2a LP |
1923 | |
1924 | for (;;) { | |
1925 | r = sd_bus_process(bus, NULL); | |
1926 | if (r < 0) | |
1927 | return r; | |
d728d708 LP |
1928 | if (bus->state == BUS_RUNNING) |
1929 | return 1; | |
e3017af9 LP |
1930 | if (r > 0) |
1931 | continue; | |
89ffcd2a LP |
1932 | |
1933 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1934 | if (r < 0) | |
1935 | return r; | |
1936 | } | |
1937 | } | |
1938 | ||
97f82db3 | 1939 | _public_ int sd_bus_call( |
de1c301e | 1940 | sd_bus *bus, |
97f82db3 | 1941 | sd_bus_message *_m, |
de1c301e LP |
1942 | uint64_t usec, |
1943 | sd_bus_error *error, | |
1944 | sd_bus_message **reply) { | |
1945 | ||
97f82db3 | 1946 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1947 | usec_t timeout; |
693eb9a2 | 1948 | uint64_t cookie; |
7d22c717 LP |
1949 | unsigned i; |
1950 | int r; | |
de1c301e | 1951 | |
759e02e7 LP |
1952 | bus_assert_return(m, -EINVAL, error); |
1953 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
1954 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
1955 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
1956 | |
1957 | if (!bus) | |
1958 | bus = m->bus; | |
1959 | ||
759e02e7 LP |
1960 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
1961 | bus_assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS, error); | |
97f82db3 | 1962 | |
759e02e7 LP |
1963 | if (!BUS_IS_OPEN(bus->state)) { |
1964 | r = -ENOTCONN; | |
1965 | goto fail; | |
1966 | } | |
a3d59cd1 | 1967 | |
97f82db3 KS |
1968 | r = bus_ensure_running(bus); |
1969 | if (r < 0) | |
759e02e7 | 1970 | goto fail; |
97f82db3 | 1971 | |
a43b9ca3 | 1972 | i = bus->rqueue_size; |
97f82db3 KS |
1973 | |
1974 | r = bus_seal_message(bus, m, usec); | |
1975 | if (r < 0) | |
759e02e7 | 1976 | goto fail; |
97f82db3 KS |
1977 | |
1978 | r = bus_remarshal_message(bus, &m); | |
1979 | if (r < 0) | |
759e02e7 | 1980 | goto fail; |
97f82db3 | 1981 | |
069f5e61 | 1982 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e | 1983 | if (r < 0) |
759e02e7 | 1984 | goto fail; |
de1c301e | 1985 | |
3df7a7e6 | 1986 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1987 | |
1988 | for (;;) { | |
1989 | usec_t left; | |
de1c301e | 1990 | |
7d22c717 LP |
1991 | while (i < bus->rqueue_size) { |
1992 | sd_bus_message *incoming = NULL; | |
1993 | ||
1994 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1995 | |
693eb9a2 | 1996 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1997 | /* Found a match! */ |
1998 | ||
7d22c717 LP |
1999 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2000 | bus->rqueue_size--; | |
f9f97ca6 | 2001 | log_debug_bus_message(incoming); |
7d22c717 | 2002 | |
40ca29a1 | 2003 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2004 | |
2ce97e2b LP |
2005 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2006 | if (reply) | |
2007 | *reply = incoming; | |
2008 | else | |
2009 | sd_bus_message_unref(incoming); | |
2010 | ||
2011 | return 1; | |
2012 | } | |
2013 | ||
2014 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2015 | sd_bus_message_unref(incoming); |
2016 | return r; | |
b7f247e0 | 2017 | |
759e02e7 | 2018 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2019 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2020 | sd_bus_message_unref(incoming); |
2021 | return r; | |
2022 | } else { | |
a43b9ca3 | 2023 | r = -EIO; |
759e02e7 LP |
2024 | goto fail; |
2025 | } | |
a8a07f89 | 2026 | |
693eb9a2 | 2027 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2028 | bus->unique_name && |
2029 | incoming->sender && | |
2030 | streq(bus->unique_name, incoming->sender)) { | |
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--; | |
2034 | ||
a8a07f89 LP |
2035 | /* Our own message? Somebody is trying |
2036 | * to send its own client a message, | |
2037 | * let's not dead-lock, let's fail | |
2038 | * immediately. */ | |
2039 | ||
2040 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2041 | r = -ELOOP; |
2042 | goto fail; | |
de1c301e LP |
2043 | } |
2044 | ||
de1c301e | 2045 | /* Try to read more, right-away */ |
7d22c717 | 2046 | i++; |
de1c301e | 2047 | } |
7d22c717 | 2048 | |
766c5809 | 2049 | r = bus_read_message(bus, false, 0); |
32f46480 | 2050 | if (r < 0) { |
441d56a1 | 2051 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2052 | bus_enter_closing(bus); |
759e02e7 | 2053 | r = -ECONNRESET; |
441d56a1 | 2054 | } |
32f46480 | 2055 | |
759e02e7 | 2056 | goto fail; |
32f46480 | 2057 | } |
7d22c717 | 2058 | if (r > 0) |
e3017af9 | 2059 | continue; |
de1c301e LP |
2060 | |
2061 | if (timeout > 0) { | |
2062 | usec_t n; | |
2063 | ||
2064 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2065 | if (n >= timeout) { |
2066 | r = -ETIMEDOUT; | |
2067 | goto fail; | |
2068 | } | |
de1c301e LP |
2069 | |
2070 | left = timeout - n; | |
2071 | } else | |
2072 | left = (uint64_t) -1; | |
2073 | ||
e3017af9 | 2074 | r = bus_poll(bus, true, left); |
de1c301e | 2075 | if (r < 0) |
759e02e7 LP |
2076 | goto fail; |
2077 | if (r == 0) { | |
2078 | r = -ETIMEDOUT; | |
2079 | goto fail; | |
2080 | } | |
de1c301e LP |
2081 | |
2082 | r = dispatch_wqueue(bus); | |
32f46480 | 2083 | if (r < 0) { |
441d56a1 | 2084 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2085 | bus_enter_closing(bus); |
759e02e7 | 2086 | r = -ECONNRESET; |
441d56a1 | 2087 | } |
32f46480 | 2088 | |
759e02e7 | 2089 | goto fail; |
32f46480 | 2090 | } |
de1c301e | 2091 | } |
759e02e7 LP |
2092 | |
2093 | fail: | |
2094 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2095 | } |
2096 | ||
d9f644e2 | 2097 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2098 | |
2099 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2100 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2101 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2102 | |
e82c9509 | 2103 | return bus->input_fd; |
de1c301e LP |
2104 | } |
2105 | ||
d9f644e2 | 2106 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2107 | int flags = 0; |
2108 | ||
d6888822 | 2109 | assert_return(bus, -EINVAL); |
d6888822 | 2110 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2111 | |
a3d59cd1 LP |
2112 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2113 | return -ENOTCONN; | |
2114 | ||
de1c301e LP |
2115 | if (bus->state == BUS_OPENING) |
2116 | flags |= POLLOUT; | |
89ffcd2a LP |
2117 | else if (bus->state == BUS_AUTHENTICATING) { |
2118 | ||
2181a7f5 | 2119 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2120 | flags |= POLLOUT; |
2121 | ||
2122 | flags |= POLLIN; | |
2123 | ||
2124 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2125 | if (bus->rqueue_size <= 0) |
2126 | flags |= POLLIN; | |
2127 | if (bus->wqueue_size > 0) | |
2128 | flags |= POLLOUT; | |
2129 | } | |
2130 | ||
2131 | return flags; | |
2132 | } | |
2133 | ||
d9f644e2 | 2134 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2135 | struct reply_callback *c; |
2136 | ||
d6888822 LP |
2137 | assert_return(bus, -EINVAL); |
2138 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2139 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2140 | |
a3d59cd1 LP |
2141 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2142 | return -ENOTCONN; | |
2143 | ||
8f8f05a9 LP |
2144 | if (bus->track_queue) { |
2145 | *timeout_usec = 0; | |
2146 | return 1; | |
2147 | } | |
2148 | ||
718db961 LP |
2149 | if (bus->state == BUS_CLOSING) { |
2150 | *timeout_usec = 0; | |
2151 | return 1; | |
2152 | } | |
2153 | ||
e3017af9 LP |
2154 | if (bus->state == BUS_AUTHENTICATING) { |
2155 | *timeout_usec = bus->auth_timeout; | |
2156 | return 1; | |
2157 | } | |
2158 | ||
adee69fa LP |
2159 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2160 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2161 | return 0; |
adee69fa | 2162 | } |
e3017af9 | 2163 | |
8efd6381 LP |
2164 | if (bus->rqueue_size > 0) { |
2165 | *timeout_usec = 0; | |
2166 | return 1; | |
2167 | } | |
2168 | ||
e3017af9 | 2169 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2170 | if (!c) { |
2171 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2172 | return 0; |
adee69fa | 2173 | } |
e3017af9 | 2174 | |
19befb2d LP |
2175 | if (c->timeout == 0) { |
2176 | *timeout_usec = (uint64_t) -1; | |
2177 | return 0; | |
2178 | } | |
2179 | ||
e3017af9 LP |
2180 | *timeout_usec = c->timeout; |
2181 | return 1; | |
2182 | } | |
2183 | ||
2184 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2185 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2186 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2187 | struct reply_callback *c; |
1b64f838 | 2188 | sd_bus_slot *slot; |
e3017af9 LP |
2189 | usec_t n; |
2190 | int r; | |
2191 | ||
2192 | assert(bus); | |
2193 | ||
2194 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2195 | if (!c) | |
2196 | return 0; | |
2197 | ||
2198 | n = now(CLOCK_MONOTONIC); | |
2199 | if (c->timeout > n) | |
2200 | return 0; | |
2201 | ||
eb01ba5d LP |
2202 | r = bus_message_new_synthetic_error( |
2203 | bus, | |
693eb9a2 | 2204 | c->cookie, |
14c24659 | 2205 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2206 | &m); |
2207 | if (r < 0) | |
2208 | return r; | |
2209 | ||
7adc46fc | 2210 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2211 | if (r < 0) |
2212 | return r; | |
2213 | ||
e3017af9 | 2214 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2215 | c->timeout = 0; |
2216 | ||
c9fe4af7 | 2217 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2218 | c->cookie = 0; |
2219 | ||
1b64f838 | 2220 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2221 | |
718db961 LP |
2222 | bus->iteration_counter ++; |
2223 | ||
1b64f838 LP |
2224 | bus->current_message = m; |
2225 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2226 | bus->current_handler = c->callback; |
2227 | bus->current_userdata = slot->userdata; | |
19070062 | 2228 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2229 | bus->current_userdata = NULL; |
2230 | bus->current_handler = NULL; | |
d974ad05 | 2231 | bus->current_slot = NULL; |
19befb2d | 2232 | bus->current_message = NULL; |
718db961 | 2233 | |
1b64f838 LP |
2234 | if (slot->floating) { |
2235 | bus_slot_disconnect(slot); | |
2236 | sd_bus_slot_unref(slot); | |
2237 | } | |
2238 | ||
d974ad05 DH |
2239 | sd_bus_slot_unref(slot); |
2240 | ||
1b64f838 | 2241 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2242 | } |
2243 | ||
9d373862 LP |
2244 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2245 | assert(bus); | |
2246 | assert(m); | |
2247 | ||
2248 | if (bus->state != BUS_HELLO) | |
2249 | return 0; | |
2250 | ||
2251 | /* Let's make sure the first message on the bus is the HELLO | |
2252 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2253 | * here (we leave that to the usual handling), we just verify |
2254 | * we don't let any earlier msg through. */ | |
9d373862 | 2255 | |
40ca29a1 LP |
2256 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2257 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2258 | return -EIO; |
2259 | ||
19befb2d | 2260 | if (m->reply_cookie != 1) |
9d373862 LP |
2261 | return -EIO; |
2262 | ||
2263 | return 0; | |
2264 | } | |
2265 | ||
a652755d | 2266 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2267 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2268 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2269 | struct reply_callback *c; |
1b64f838 | 2270 | sd_bus_slot *slot; |
a652755d LP |
2271 | int r; |
2272 | ||
2273 | assert(bus); | |
2274 | assert(m); | |
2275 | ||
40ca29a1 LP |
2276 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2277 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2278 | return 0; |
2279 | ||
09365592 LP |
2280 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2281 | return 0; | |
2282 | ||
2283 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2284 | return 0; | |
2285 | ||
c9fe4af7 | 2286 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2287 | if (!c) |
2288 | return 0; | |
2289 | ||
19befb2d | 2290 | c->cookie = 0; |
19befb2d | 2291 | |
1b64f838 | 2292 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2293 | |
2ce97e2b LP |
2294 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2295 | ||
2296 | /* If the reply contained a file descriptor which we | |
2297 | * didn't want we pass an error instead. */ | |
2298 | ||
2299 | r = bus_message_new_synthetic_error( | |
2300 | bus, | |
2301 | m->reply_cookie, | |
2302 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2303 | &synthetic_reply); | |
2304 | if (r < 0) | |
1b64f838 | 2305 | return r; |
2ce97e2b | 2306 | |
52cd5877 LP |
2307 | /* Copy over original timestamp */ |
2308 | synthetic_reply->realtime = m->realtime; | |
2309 | synthetic_reply->monotonic = m->monotonic; | |
2310 | synthetic_reply->seqnum = m->seqnum; | |
2311 | ||
2ce97e2b LP |
2312 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2313 | if (r < 0) | |
1b64f838 | 2314 | return r; |
2ce97e2b LP |
2315 | |
2316 | m = synthetic_reply; | |
2317 | } else { | |
2318 | r = sd_bus_message_rewind(m, true); | |
2319 | if (r < 0) | |
1b64f838 | 2320 | return r; |
2ce97e2b | 2321 | } |
88fe224c | 2322 | |
1b64f838 LP |
2323 | if (c->timeout != 0) { |
2324 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2325 | c->timeout = 0; | |
2326 | } | |
19befb2d | 2327 | |
1b64f838 | 2328 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2329 | bus->current_handler = c->callback; |
2330 | bus->current_userdata = slot->userdata; | |
19070062 | 2331 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2332 | bus->current_userdata = NULL; |
2333 | bus->current_handler = NULL; | |
d974ad05 | 2334 | bus->current_slot = NULL; |
a652755d | 2335 | |
19befb2d LP |
2336 | if (slot->floating) { |
2337 | bus_slot_disconnect(slot); | |
2338 | sd_bus_slot_unref(slot); | |
2339 | } | |
2340 | ||
d974ad05 DH |
2341 | sd_bus_slot_unref(slot); |
2342 | ||
1b64f838 | 2343 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2344 | } |
2345 | ||
2346 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2347 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2348 | struct filter_callback *l; |
2349 | int r; | |
2350 | ||
392d5b37 LP |
2351 | assert(bus); |
2352 | assert(m); | |
2353 | ||
7286037f LP |
2354 | do { |
2355 | bus->filter_callbacks_modified = false; | |
2356 | ||
2357 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2358 | sd_bus_slot *slot; |
7286037f LP |
2359 | |
2360 | if (bus->filter_callbacks_modified) | |
2361 | break; | |
2362 | ||
2363 | /* Don't run this more than once per iteration */ | |
2364 | if (l->last_iteration == bus->iteration_counter) | |
2365 | continue; | |
2366 | ||
2367 | l->last_iteration = bus->iteration_counter; | |
2368 | ||
88fe224c LP |
2369 | r = sd_bus_message_rewind(m, true); |
2370 | if (r < 0) | |
2371 | return r; | |
2372 | ||
1b64f838 LP |
2373 | slot = container_of(l, sd_bus_slot, filter_callback); |
2374 | ||
2375 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2376 | bus->current_handler = l->callback; |
2377 | bus->current_userdata = slot->userdata; | |
19070062 | 2378 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2379 | bus->current_userdata = NULL; |
2380 | bus->current_handler = NULL; | |
1b64f838 | 2381 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2382 | |
ebcf1f97 | 2383 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2384 | if (r != 0) |
2385 | return r; | |
2386 | ||
2387 | } | |
2388 | ||
2389 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2390 | |
2391 | return 0; | |
2392 | } | |
2393 | ||
392d5b37 | 2394 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2395 | int r; |
2396 | ||
392d5b37 LP |
2397 | assert(bus); |
2398 | assert(m); | |
2399 | ||
7286037f LP |
2400 | do { |
2401 | bus->match_callbacks_modified = false; | |
2402 | ||
eb01ba5d | 2403 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2404 | if (r != 0) |
2405 | return r; | |
2406 | ||
2407 | } while (bus->match_callbacks_modified); | |
2408 | ||
2409 | return 0; | |
392d5b37 LP |
2410 | } |
2411 | ||
b9bf7e2b LP |
2412 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2413 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2414 | int r; | |
2415 | ||
2416 | assert(bus); | |
2417 | assert(m); | |
2418 | ||
09365592 LP |
2419 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2420 | return 0; | |
2421 | ||
758bf0c7 LP |
2422 | if (bus->manual_peer_interface) |
2423 | return 0; | |
2424 | ||
40ca29a1 | 2425 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2426 | return 0; |
2427 | ||
2428 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2429 | return 0; | |
2430 | ||
0461f8cd | 2431 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2432 | return 1; |
2433 | ||
2434 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2435 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2436 | else if (streq_ptr(m->member, "GetMachineId")) { |
2437 | sd_id128_t id; | |
2438 | char sid[33]; | |
2439 | ||
2440 | r = sd_id128_get_machine(&id); | |
2441 | if (r < 0) | |
2442 | return r; | |
2443 | ||
df2d202e | 2444 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2445 | if (r < 0) |
2446 | return r; | |
2447 | ||
2448 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2449 | } else { | |
29ddb38f | 2450 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2451 | m, &reply, |
40ca29a1 | 2452 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2453 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2454 | } |
2455 | ||
2456 | if (r < 0) | |
2457 | return r; | |
2458 | ||
2459 | r = sd_bus_send(bus, reply, NULL); | |
2460 | if (r < 0) | |
2461 | return r; | |
2462 | ||
2463 | return 1; | |
2464 | } | |
2465 | ||
2ce97e2b LP |
2466 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2467 | assert(bus); | |
2468 | assert(m); | |
2469 | ||
2470 | /* If we got a message with a file descriptor which we didn't | |
2471 | * want to accept, then let's drop it. How can this even | |
2472 | * happen? For example, when the kernel queues a message into | |
2473 | * an activatable names's queue which allows fds, and then is | |
2474 | * delivered to us later even though we ourselves did not | |
2475 | * negotiate it. */ | |
2476 | ||
09365592 LP |
2477 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2478 | return 0; | |
2479 | ||
2ce97e2b LP |
2480 | if (m->n_fds <= 0) |
2481 | return 0; | |
2482 | ||
2483 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2484 | return 0; | |
2485 | ||
2486 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2487 | return 1; /* just eat it up */ | |
2488 | ||
2489 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2490 | } | |
2491 | ||
992c052c | 2492 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2493 | int r; |
2494 | ||
2495 | assert(bus); | |
992c052c | 2496 | assert(m); |
e3017af9 | 2497 | |
19befb2d | 2498 | bus->current_message = m; |
992c052c | 2499 | bus->iteration_counter++; |
e3017af9 | 2500 | |
f9f97ca6 | 2501 | log_debug_bus_message(m); |
40ca29a1 | 2502 | |
992c052c LP |
2503 | r = process_hello(bus, m); |
2504 | if (r != 0) | |
affff0b6 | 2505 | goto finish; |
a652755d | 2506 | |
992c052c LP |
2507 | r = process_reply(bus, m); |
2508 | if (r != 0) | |
affff0b6 | 2509 | goto finish; |
e3017af9 | 2510 | |
2ce97e2b LP |
2511 | r = process_fd_check(bus, m); |
2512 | if (r != 0) | |
2513 | goto finish; | |
2514 | ||
992c052c LP |
2515 | r = process_filter(bus, m); |
2516 | if (r != 0) | |
affff0b6 | 2517 | goto finish; |
a652755d | 2518 | |
992c052c LP |
2519 | r = process_match(bus, m); |
2520 | if (r != 0) | |
affff0b6 | 2521 | goto finish; |
a652755d | 2522 | |
992c052c LP |
2523 | r = process_builtin(bus, m); |
2524 | if (r != 0) | |
affff0b6 LP |
2525 | goto finish; |
2526 | ||
2527 | r = bus_process_object(bus, m); | |
a652755d | 2528 | |
affff0b6 | 2529 | finish: |
19befb2d | 2530 | bus->current_message = NULL; |
affff0b6 | 2531 | return r; |
29ddb38f | 2532 | } |
88fe224c | 2533 | |
8f8f05a9 LP |
2534 | static int dispatch_track(sd_bus *bus) { |
2535 | assert(bus); | |
2536 | ||
2537 | if (!bus->track_queue) | |
2538 | return 0; | |
2539 | ||
2540 | bus_track_dispatch(bus->track_queue); | |
2541 | return 1; | |
2542 | } | |
2543 | ||
766c5809 | 2544 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2545 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2546 | int r; |
a652755d | 2547 | |
29ddb38f | 2548 | assert(bus); |
992c052c | 2549 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2550 | |
992c052c LP |
2551 | r = process_timeout(bus); |
2552 | if (r != 0) | |
2553 | goto null_message; | |
7286037f | 2554 | |
992c052c LP |
2555 | r = dispatch_wqueue(bus); |
2556 | if (r != 0) | |
2557 | goto null_message; | |
7286037f | 2558 | |
8f8f05a9 LP |
2559 | r = dispatch_track(bus); |
2560 | if (r != 0) | |
2561 | goto null_message; | |
2562 | ||
766c5809 | 2563 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2564 | if (r < 0) |
2565 | return r; | |
2566 | if (!m) | |
2567 | goto null_message; | |
7286037f | 2568 | |
992c052c LP |
2569 | r = process_message(bus, m); |
2570 | if (r != 0) | |
2571 | goto null_message; | |
7286037f | 2572 | |
992c052c LP |
2573 | if (ret) { |
2574 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2575 | if (r < 0) |
2576 | return r; | |
e3017af9 | 2577 | |
992c052c LP |
2578 | *ret = m; |
2579 | m = NULL; | |
2580 | return 1; | |
2581 | } | |
a652755d | 2582 | |
40ca29a1 | 2583 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2584 | |
dc74ce9b LP |
2585 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2586 | strna(sd_bus_message_get_sender(m)), | |
2587 | strna(sd_bus_message_get_path(m)), | |
2588 | strna(sd_bus_message_get_interface(m)), | |
2589 | strna(sd_bus_message_get_member(m))); | |
2590 | ||
992c052c | 2591 | r = sd_bus_reply_method_errorf( |
df2d202e | 2592 | m, |
40ca29a1 | 2593 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2594 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2595 | if (r < 0) |
2596 | return r; | |
2597 | } | |
e3017af9 | 2598 | |
992c052c | 2599 | return 1; |
0a72c2bd | 2600 | |
992c052c LP |
2601 | null_message: |
2602 | if (r >= 0 && ret) | |
2603 | *ret = NULL; | |
0a72c2bd | 2604 | |
992c052c | 2605 | return r; |
29ddb38f | 2606 | } |
0a72c2bd | 2607 | |
718db961 LP |
2608 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2609 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2610 | struct reply_callback *c; | |
2611 | int r; | |
2612 | ||
2613 | assert(bus); | |
2614 | assert(bus->state == BUS_CLOSING); | |
2615 | ||
c9fe4af7 | 2616 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2617 | if (c) { |
ebcf1f97 | 2618 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2619 | sd_bus_slot *slot; |
ebcf1f97 | 2620 | |
718db961 LP |
2621 | /* First, fail all outstanding method calls */ |
2622 | r = bus_message_new_synthetic_error( | |
2623 | bus, | |
693eb9a2 | 2624 | c->cookie, |
14c24659 | 2625 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2626 | &m); |
2627 | if (r < 0) | |
2628 | return r; | |
2629 | ||
7adc46fc | 2630 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2631 | if (r < 0) |
2632 | return r; | |
2633 | ||
19befb2d | 2634 | if (c->timeout != 0) { |
718db961 | 2635 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2636 | c->timeout = 0; |
2637 | } | |
718db961 | 2638 | |
c9fe4af7 | 2639 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2640 | c->cookie = 0; |
2641 | ||
1b64f838 | 2642 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2643 | |
718db961 LP |
2644 | bus->iteration_counter++; |
2645 | ||
1b64f838 LP |
2646 | bus->current_message = m; |
2647 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2648 | bus->current_handler = c->callback; |
2649 | bus->current_userdata = slot->userdata; | |
19070062 | 2650 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2651 | bus->current_userdata = NULL; |
2652 | bus->current_handler = NULL; | |
d974ad05 | 2653 | bus->current_slot = NULL; |
1b64f838 LP |
2654 | bus->current_message = NULL; |
2655 | ||
2656 | if (slot->floating) { | |
2657 | bus_slot_disconnect(slot); | |
2658 | sd_bus_slot_unref(slot); | |
2659 | } | |
718db961 | 2660 | |
d974ad05 DH |
2661 | sd_bus_slot_unref(slot); |
2662 | ||
1b64f838 | 2663 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2664 | } |
2665 | ||
2666 | /* Then, synthesize a Disconnected message */ | |
2667 | r = sd_bus_message_new_signal( | |
2668 | bus, | |
151b9b96 | 2669 | &m, |
718db961 LP |
2670 | "/org/freedesktop/DBus/Local", |
2671 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2672 | "Disconnected"); |
718db961 LP |
2673 | if (r < 0) |
2674 | return r; | |
2675 | ||
fb6d9b77 | 2676 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2677 | |
7adc46fc | 2678 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2679 | if (r < 0) |
2680 | return r; | |
2681 | ||
2682 | sd_bus_close(bus); | |
2683 | ||
19befb2d | 2684 | bus->current_message = m; |
718db961 LP |
2685 | bus->iteration_counter++; |
2686 | ||
2687 | r = process_filter(bus, m); | |
2688 | if (r != 0) | |
2689 | goto finish; | |
2690 | ||
2691 | r = process_match(bus, m); | |
2692 | if (r != 0) | |
2693 | goto finish; | |
2694 | ||
2695 | if (ret) { | |
2696 | *ret = m; | |
2697 | m = NULL; | |
2698 | } | |
2699 | ||
2700 | r = 1; | |
2701 | ||
2702 | finish: | |
19befb2d LP |
2703 | bus->current_message = NULL; |
2704 | ||
718db961 LP |
2705 | return r; |
2706 | } | |
2707 | ||
766c5809 | 2708 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2709 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2710 | int r; |
0a72c2bd | 2711 | |
992c052c LP |
2712 | /* Returns 0 when we didn't do anything. This should cause the |
2713 | * caller to invoke sd_bus_wait() before returning the next | |
2714 | * time. Returns > 0 when we did something, which possibly | |
2715 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2716 | |
d6888822 LP |
2717 | assert_return(bus, -EINVAL); |
2718 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2719 | |
992c052c | 2720 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2721 | assert_return(!bus->current_message, -EBUSY); |
2722 | assert(!bus->current_slot); | |
0a72c2bd | 2723 | |
992c052c | 2724 | switch (bus->state) { |
0a72c2bd | 2725 | |
992c052c | 2726 | case BUS_UNSET: |
992c052c | 2727 | return -ENOTCONN; |
0a72c2bd | 2728 | |
6d6f4904 LP |
2729 | case BUS_CLOSED: |
2730 | return -ECONNRESET; | |
2731 | ||
992c052c LP |
2732 | case BUS_OPENING: |
2733 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2734 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2735 | bus_enter_closing(bus); |
2736 | r = 1; | |
2737 | } else if (r < 0) | |
29ddb38f | 2738 | return r; |
992c052c LP |
2739 | if (ret) |
2740 | *ret = NULL; | |
a652755d LP |
2741 | return r; |
2742 | ||
992c052c | 2743 | case BUS_AUTHENTICATING: |
992c052c | 2744 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2745 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2746 | bus_enter_closing(bus); |
2747 | r = 1; | |
2748 | } else if (r < 0) | |
29ddb38f | 2749 | return r; |
718db961 | 2750 | |
992c052c LP |
2751 | if (ret) |
2752 | *ret = NULL; | |
718db961 | 2753 | |
992c052c | 2754 | return r; |
a652755d | 2755 | |
992c052c LP |
2756 | case BUS_RUNNING: |
2757 | case BUS_HELLO: | |
766c5809 | 2758 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2759 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2760 | bus_enter_closing(bus); |
2761 | r = 1; | |
2762 | ||
2763 | if (ret) | |
2764 | *ret = NULL; | |
2765 | } | |
43a43f50 | 2766 | |
43a43f50 | 2767 | return r; |
718db961 LP |
2768 | |
2769 | case BUS_CLOSING: | |
2770 | return process_closing(bus, ret); | |
992c052c | 2771 | } |
43a43f50 | 2772 | |
992c052c | 2773 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2774 | } |
2775 | ||
766c5809 LP |
2776 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2777 | return bus_process_internal(bus, false, 0, ret); | |
2778 | } | |
2779 | ||
2780 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2781 | return bus_process_internal(bus, true, priority, ret); | |
2782 | } | |
2783 | ||
992c052c LP |
2784 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2785 | struct pollfd p[2] = {}; | |
2786 | int r, e, n; | |
2787 | struct timespec ts; | |
3a43da28 | 2788 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2789 | |
2790 | assert(bus); | |
718db961 LP |
2791 | |
2792 | if (bus->state == BUS_CLOSING) | |
2793 | return 1; | |
2794 | ||
a3d59cd1 LP |
2795 | if (!BUS_IS_OPEN(bus->state)) |
2796 | return -ENOTCONN; | |
adcdb374 | 2797 | |
992c052c LP |
2798 | e = sd_bus_get_events(bus); |
2799 | if (e < 0) | |
2800 | return e; | |
adcdb374 | 2801 | |
992c052c | 2802 | if (need_more) |
8efd6381 LP |
2803 | /* The caller really needs some more data, he doesn't |
2804 | * care about what's already read, or any timeouts | |
ad67ef27 | 2805 | * except its own. */ |
992c052c | 2806 | e |= POLLIN; |
992c052c | 2807 | else { |
8efd6381 LP |
2808 | usec_t until; |
2809 | /* The caller wants to process if there's something to | |
2810 | * process, but doesn't care otherwise */ | |
2811 | ||
2812 | r = sd_bus_get_timeout(bus, &until); | |
2813 | if (r < 0) | |
2814 | return r; | |
2815 | if (r > 0) { | |
2816 | usec_t nw; | |
2817 | nw = now(CLOCK_MONOTONIC); | |
2818 | m = until > nw ? until - nw : 0; | |
2819 | } | |
992c052c | 2820 | } |
adcdb374 | 2821 | |
992c052c LP |
2822 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2823 | m = timeout_usec; | |
adcdb374 | 2824 | |
992c052c LP |
2825 | p[0].fd = bus->input_fd; |
2826 | if (bus->output_fd == bus->input_fd) { | |
2827 | p[0].events = e; | |
2828 | n = 1; | |
2829 | } else { | |
2830 | p[0].events = e & POLLIN; | |
2831 | p[1].fd = bus->output_fd; | |
2832 | p[1].events = e & POLLOUT; | |
2833 | n = 2; | |
adcdb374 LP |
2834 | } |
2835 | ||
992c052c | 2836 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2837 | if (r < 0) |
992c052c | 2838 | return -errno; |
adcdb374 | 2839 | |
992c052c | 2840 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2841 | } |
2842 | ||
d9f644e2 | 2843 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2844 | |
d6888822 | 2845 | assert_return(bus, -EINVAL); |
d6888822 | 2846 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2847 | |
718db961 LP |
2848 | if (bus->state == BUS_CLOSING) |
2849 | return 0; | |
2850 | ||
a3d59cd1 LP |
2851 | if (!BUS_IS_OPEN(bus->state)) |
2852 | return -ENOTCONN; | |
718db961 | 2853 | |
992c052c LP |
2854 | if (bus->rqueue_size > 0) |
2855 | return 0; | |
9db76355 | 2856 | |
992c052c LP |
2857 | return bus_poll(bus, false, timeout_usec); |
2858 | } | |
9db76355 | 2859 | |
d9f644e2 | 2860 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2861 | int r; |
9db76355 | 2862 | |
d6888822 | 2863 | assert_return(bus, -EINVAL); |
d6888822 | 2864 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2865 | |
718db961 LP |
2866 | if (bus->state == BUS_CLOSING) |
2867 | return 0; | |
2868 | ||
a3d59cd1 LP |
2869 | if (!BUS_IS_OPEN(bus->state)) |
2870 | return -ENOTCONN; | |
718db961 | 2871 | |
992c052c LP |
2872 | r = bus_ensure_running(bus); |
2873 | if (r < 0) | |
2874 | return r; | |
9db76355 | 2875 | |
992c052c LP |
2876 | if (bus->wqueue_size <= 0) |
2877 | return 0; | |
9db76355 | 2878 | |
992c052c LP |
2879 | for (;;) { |
2880 | r = dispatch_wqueue(bus); | |
32f46480 | 2881 | if (r < 0) { |
441d56a1 | 2882 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2883 | bus_enter_closing(bus); |
441d56a1 LP |
2884 | return -ECONNRESET; |
2885 | } | |
32f46480 | 2886 | |
9db76355 | 2887 | return r; |
32f46480 | 2888 | } |
9db76355 | 2889 | |
992c052c LP |
2890 | if (bus->wqueue_size <= 0) |
2891 | return 0; | |
9db76355 | 2892 | |
992c052c | 2893 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2894 | if (r < 0) |
2895 | return r; | |
9db76355 | 2896 | } |
9db76355 LP |
2897 | } |
2898 | ||
19befb2d LP |
2899 | _public_ int sd_bus_add_filter( |
2900 | sd_bus *bus, | |
2901 | sd_bus_slot **slot, | |
2902 | sd_bus_message_handler_t callback, | |
2903 | void *userdata) { | |
d9f644e2 | 2904 | |
19befb2d | 2905 | sd_bus_slot *s; |
de1c301e | 2906 | |
d6888822 LP |
2907 | assert_return(bus, -EINVAL); |
2908 | assert_return(callback, -EINVAL); | |
2909 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2910 | |
19befb2d LP |
2911 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2912 | if (!s) | |
29ddb38f LP |
2913 | return -ENOMEM; |
2914 | ||
19befb2d | 2915 | s->filter_callback.callback = callback; |
a652755d | 2916 | |
19befb2d LP |
2917 | bus->filter_callbacks_modified = true; |
2918 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2919 | |
19befb2d LP |
2920 | if (slot) |
2921 | *slot = s; | |
29ddb38f | 2922 | |
992c052c | 2923 | return 0; |
a652755d | 2924 | } |
392d5b37 | 2925 | |
19befb2d LP |
2926 | _public_ int sd_bus_add_match( |
2927 | sd_bus *bus, | |
2928 | sd_bus_slot **slot, | |
2929 | const char *match, | |
2930 | sd_bus_message_handler_t callback, | |
2931 | void *userdata) { | |
d9f644e2 | 2932 | |
992c052c LP |
2933 | struct bus_match_component *components = NULL; |
2934 | unsigned n_components = 0; | |
2915234d | 2935 | sd_bus_slot *s = NULL; |
992c052c | 2936 | int r = 0; |
392d5b37 | 2937 | |
d6888822 LP |
2938 | assert_return(bus, -EINVAL); |
2939 | assert_return(match, -EINVAL); | |
2940 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2941 | |
992c052c LP |
2942 | r = bus_match_parse(match, &components, &n_components); |
2943 | if (r < 0) | |
2944 | goto finish; | |
29ddb38f | 2945 | |
19befb2d LP |
2946 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2947 | if (!s) { | |
2948 | r = -ENOMEM; | |
2949 | goto finish; | |
2950 | } | |
2951 | ||
2952 | s->match_callback.callback = callback; | |
2953 | s->match_callback.cookie = ++bus->match_cookie; | |
2954 | ||
992c052c | 2955 | if (bus->bus_client) { |
cc65fe5e | 2956 | enum bus_match_scope scope; |
29ddb38f | 2957 | |
cc65fe5e | 2958 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 2959 | |
cc65fe5e LP |
2960 | /* Do not install server-side matches for matches |
2961 | * against the local service, interface or bus | |
9ee7a50c DH |
2962 | * path. */ |
2963 | if (scope != BUS_MATCH_LOCAL) { | |
cc65fe5e LP |
2964 | |
2965 | if (!bus->is_kernel) { | |
2966 | /* When this is not a kernel transport, we | |
2967 | * store the original match string, so that we | |
2968 | * can use it to remove the match again */ | |
2969 | ||
2970 | s->match_callback.match_string = strdup(match); | |
2971 | if (!s->match_callback.match_string) { | |
2972 | r = -ENOMEM; | |
2973 | goto finish; | |
2974 | } | |
19befb2d | 2975 | } |
19befb2d | 2976 | |
cc65fe5e LP |
2977 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); |
2978 | if (r < 0) | |
2979 | goto finish; | |
2980 | ||
2981 | s->match_added = true; | |
2982 | } | |
392d5b37 LP |
2983 | } |
2984 | ||
992c052c | 2985 | bus->match_callbacks_modified = true; |
19befb2d LP |
2986 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2987 | if (r < 0) | |
2988 | goto finish; | |
2989 | ||
2990 | if (slot) | |
2991 | *slot = s; | |
2992 | s = NULL; | |
917b5dc7 | 2993 | |
992c052c LP |
2994 | finish: |
2995 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2996 | sd_bus_slot_unref(s); |
2997 | ||
992c052c | 2998 | return r; |
917b5dc7 LP |
2999 | } |
3000 | ||
19befb2d LP |
3001 | int bus_remove_match_by_string( |
3002 | sd_bus *bus, | |
3003 | const char *match, | |
3004 | sd_bus_message_handler_t callback, | |
3005 | void *userdata) { | |
d9f644e2 | 3006 | |
992c052c LP |
3007 | struct bus_match_component *components = NULL; |
3008 | unsigned n_components = 0; | |
19befb2d LP |
3009 | struct match_callback *c; |
3010 | int r = 0; | |
917b5dc7 | 3011 | |
d6888822 LP |
3012 | assert_return(bus, -EINVAL); |
3013 | assert_return(match, -EINVAL); | |
3014 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 3015 | |
992c052c | 3016 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 3017 | if (r < 0) |
19befb2d | 3018 | goto finish; |
f10dda3b | 3019 | |
19befb2d LP |
3020 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
3021 | if (r <= 0) | |
3022 | goto finish; | |
f10dda3b | 3023 | |
19befb2d | 3024 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 3025 | |
19befb2d | 3026 | finish: |
992c052c | 3027 | bus_match_parse_free(components, n_components); |
f10dda3b | 3028 | |
19befb2d | 3029 | return r; |
f10dda3b LP |
3030 | } |
3031 | ||
992c052c LP |
3032 | bool bus_pid_changed(sd_bus *bus) { |
3033 | assert(bus); | |
f10dda3b | 3034 | |
992c052c LP |
3035 | /* We don't support people creating a bus connection and |
3036 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3037 | |
992c052c | 3038 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3039 | } |
40ca29a1 LP |
3040 | |
3041 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3042 | sd_bus *bus = userdata; |
40ca29a1 LP |
3043 | int r; |
3044 | ||
3045 | assert(bus); | |
3046 | ||
3047 | r = sd_bus_process(bus, NULL); | |
3048 | if (r < 0) | |
3049 | return r; | |
3050 | ||
3051 | return 1; | |
3052 | } | |
3053 | ||
3054 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3055 | sd_bus *bus = userdata; |
40ca29a1 LP |
3056 | int r; |
3057 | ||
3058 | assert(bus); | |
3059 | ||
3060 | r = sd_bus_process(bus, NULL); | |
3061 | if (r < 0) | |
3062 | return r; | |
3063 | ||
3064 | return 1; | |
3065 | } | |
3066 | ||
3067 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3068 | sd_bus *bus = userdata; | |
3069 | int r, e; | |
3070 | usec_t until; | |
3071 | ||
3072 | assert(s); | |
3073 | assert(bus); | |
3074 | ||
3075 | e = sd_bus_get_events(bus); | |
3076 | if (e < 0) | |
3077 | return e; | |
3078 | ||
3079 | if (bus->output_fd != bus->input_fd) { | |
3080 | ||
3081 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3082 | if (r < 0) | |
3083 | return r; | |
3084 | ||
3085 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3086 | if (r < 0) | |
3087 | return r; | |
3088 | } else { | |
3089 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3090 | if (r < 0) | |
3091 | return r; | |
3092 | } | |
3093 | ||
3094 | r = sd_bus_get_timeout(bus, &until); | |
3095 | if (r < 0) | |
3096 | return r; | |
3097 | if (r > 0) { | |
3098 | int j; | |
3099 | ||
3100 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3101 | if (j < 0) | |
3102 | return j; | |
3103 | } | |
3104 | ||
3105 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3106 | if (r < 0) | |
3107 | return r; | |
3108 | ||
3109 | return 1; | |
3110 | } | |
3111 | ||
abc5fe72 LP |
3112 | static int quit_callback(sd_event_source *event, void *userdata) { |
3113 | sd_bus *bus = userdata; | |
3114 | ||
3115 | assert(event); | |
3116 | ||
3117 | sd_bus_flush(bus); | |
7bb4d371 | 3118 | sd_bus_close(bus); |
abc5fe72 LP |
3119 | |
3120 | return 1; | |
3121 | } | |
3122 | ||
1e05d493 LP |
3123 | static int attach_io_events(sd_bus *bus) { |
3124 | int r; | |
3125 | ||
3126 | assert(bus); | |
3127 | ||
3128 | if (bus->input_fd < 0) | |
3129 | return 0; | |
3130 | ||
3131 | if (!bus->event) | |
3132 | return 0; | |
3133 | ||
3134 | if (!bus->input_io_event_source) { | |
151b9b96 | 3135 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3136 | if (r < 0) |
3137 | return r; | |
3138 | ||
3139 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3140 | if (r < 0) | |
3141 | return r; | |
3142 | ||
3143 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3144 | if (r < 0) |
3145 | return r; | |
3146 | ||
356779df | 3147 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3148 | } else |
3149 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3150 | ||
3151 | if (r < 0) | |
3152 | return r; | |
3153 | ||
3154 | if (bus->output_fd != bus->input_fd) { | |
3155 | assert(bus->output_fd >= 0); | |
3156 | ||
3157 | if (!bus->output_io_event_source) { | |
151b9b96 | 3158 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3159 | if (r < 0) |
3160 | return r; | |
3161 | ||
3162 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3163 | if (r < 0) |
3164 | return r; | |
3165 | ||
356779df | 3166 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3167 | } else |
3168 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3169 | ||
3170 | if (r < 0) | |
3171 | return r; | |
3172 | } | |
3173 | ||
3174 | return 0; | |
3175 | } | |
3176 | ||
3177 | static void detach_io_events(sd_bus *bus) { | |
3178 | assert(bus); | |
3179 | ||
3180 | if (bus->input_io_event_source) { | |
3181 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3182 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3183 | } | |
3184 | ||
3185 | if (bus->output_io_event_source) { | |
3186 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3187 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3188 | } | |
3189 | } | |
3190 | ||
d9f644e2 | 3191 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3192 | int r; |
3193 | ||
3194 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3195 | assert_return(!bus->event, -EBUSY); |
3196 | ||
3197 | assert(!bus->input_io_event_source); | |
3198 | assert(!bus->output_io_event_source); | |
3199 | assert(!bus->time_event_source); | |
3200 | ||
76b54375 LP |
3201 | if (event) |
3202 | bus->event = sd_event_ref(event); | |
3203 | else { | |
3204 | r = sd_event_default(&bus->event); | |
3205 | if (r < 0) | |
3206 | return r; | |
3207 | } | |
40ca29a1 | 3208 | |
1e05d493 | 3209 | bus->event_priority = priority; |
40ca29a1 | 3210 | |
6a0f1f6d | 3211 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3212 | if (r < 0) |
3213 | goto fail; | |
3214 | ||
3215 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3216 | if (r < 0) | |
3217 | goto fail; | |
3218 | ||
356779df | 3219 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3220 | if (r < 0) |
3221 | goto fail; | |
3222 | ||
151b9b96 | 3223 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3224 | if (r < 0) |
3225 | goto fail; | |
3226 | ||
356779df | 3227 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3228 | if (r < 0) |
3229 | goto fail; | |
3230 | ||
1e05d493 LP |
3231 | r = attach_io_events(bus); |
3232 | if (r < 0) | |
3233 | goto fail; | |
3234 | ||
40ca29a1 LP |
3235 | return 0; |
3236 | ||
3237 | fail: | |
3238 | sd_bus_detach_event(bus); | |
3239 | return r; | |
3240 | } | |
3241 | ||
d9f644e2 | 3242 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3243 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3244 | |
3245 | if (!bus->event) | |
3246 | return 0; | |
40ca29a1 | 3247 | |
1e05d493 | 3248 | detach_io_events(bus); |
40ca29a1 | 3249 | |
86befb40 LP |
3250 | if (bus->time_event_source) { |
3251 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3252 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3253 | } |
40ca29a1 | 3254 | |
86befb40 LP |
3255 | if (bus->quit_event_source) { |
3256 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3257 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3258 | } |
abc5fe72 | 3259 | |
93f1bcf4 | 3260 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3261 | return 1; |
40ca29a1 | 3262 | } |
affff0b6 | 3263 | |
2be44176 LP |
3264 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3265 | assert_return(bus, NULL); | |
3266 | ||
3267 | return bus->event; | |
3268 | } | |
3269 | ||
19befb2d LP |
3270 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3271 | assert_return(bus, NULL); | |
3272 | ||
3273 | return bus->current_message; | |
3274 | } | |
3275 | ||
3276 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3277 | assert_return(bus, NULL); |
3278 | ||
19befb2d | 3279 | return bus->current_slot; |
affff0b6 | 3280 | } |
76b54375 | 3281 | |
caa82984 LP |
3282 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3283 | assert_return(bus, NULL); | |
3284 | ||
3285 | return bus->current_handler; | |
3286 | } | |
3287 | ||
3288 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3289 | assert_return(bus, NULL); | |
3290 | ||
3291 | return bus->current_userdata; | |
3292 | } | |
3293 | ||
76b54375 LP |
3294 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3295 | sd_bus *b = NULL; | |
3296 | int r; | |
3297 | ||
3298 | assert(bus_open); | |
3299 | assert(default_bus); | |
3300 | ||
3301 | if (!ret) | |
3302 | return !!*default_bus; | |
3303 | ||
3304 | if (*default_bus) { | |
3305 | *ret = sd_bus_ref(*default_bus); | |
3306 | return 0; | |
3307 | } | |
3308 | ||
3309 | r = bus_open(&b); | |
3310 | if (r < 0) | |
3311 | return r; | |
3312 | ||
3313 | b->default_bus_ptr = default_bus; | |
3314 | b->tid = gettid(); | |
3315 | *default_bus = b; | |
3316 | ||
3317 | *ret = b; | |
3318 | return 1; | |
3319 | } | |
3320 | ||
3321 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 3322 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
3323 | |
3324 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
3325 | } | |
3326 | ||
3327 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 3328 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
3329 | |
3330 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
3331 | } | |
3332 | ||
af08d2f9 LP |
3333 | _public_ int sd_bus_default(sd_bus **ret) { |
3334 | ||
3335 | const char *e; | |
3336 | ||
3337 | /* Let's try our best to reuse another cached connection. If | |
3338 | * the starter bus type is set, connect via our normal | |
3339 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3340 | * we can share the connection with the user/system default | |
3341 | * bus. */ | |
3342 | ||
3343 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3344 | if (e) { | |
3345 | if (streq(e, "system")) | |
3346 | return sd_bus_default_system(ret); | |
09365592 | 3347 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3348 | return sd_bus_default_user(ret); |
3349 | } | |
3350 | ||
3351 | /* No type is specified, so we have not other option than to | |
3352 | * use the starter address if it is set. */ | |
3353 | ||
3354 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3355 | if (e) { | |
3356 | static thread_local sd_bus *default_starter_bus = NULL; | |
3357 | ||
3358 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3359 | } | |
3360 | ||
3361 | /* Finally, if nothing is set use the cached connection for | |
3362 | * the right scope */ | |
3363 | ||
3364 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3365 | return sd_bus_default_user(ret); | |
3366 | else | |
3367 | return sd_bus_default_system(ret); | |
3368 | } | |
3369 | ||
76b54375 LP |
3370 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3371 | assert_return(b, -EINVAL); | |
3372 | assert_return(tid, -EINVAL); | |
3373 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3374 | ||
3375 | if (b->tid != 0) { | |
3376 | *tid = b->tid; | |
3377 | return 0; | |
3378 | } | |
3379 | ||
3380 | if (b->event) | |
3381 | return sd_event_get_tid(b->event, tid); | |
3382 | ||
3383 | return -ENXIO; | |
3384 | } | |
28383ba1 | 3385 | |
a6278b88 LP |
3386 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3387 | _cleanup_free_ char *e = NULL; | |
3388 | char *ret; | |
3389 | ||
3390 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3391 | assert_return(external_id, -EINVAL); | |
3392 | assert_return(ret_path, -EINVAL); | |
3393 | ||
3394 | e = bus_label_escape(external_id); | |
3395 | if (!e) | |
3396 | return -ENOMEM; | |
3397 | ||
3398 | ret = strjoin(prefix, "/", e, NULL); | |
3399 | if (!ret) | |
3400 | return -ENOMEM; | |
3401 | ||
3402 | *ret_path = ret; | |
3403 | return 0; | |
28383ba1 LP |
3404 | } |
3405 | ||
a6278b88 LP |
3406 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3407 | const char *e; | |
3408 | char *ret; | |
3409 | ||
3410 | assert_return(object_path_is_valid(path), -EINVAL); | |
3411 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3412 | assert_return(external_id, -EINVAL); | |
3413 | ||
3414 | e = object_path_startswith(path, prefix); | |
3415 | if (!e) { | |
3416 | *external_id = NULL; | |
3417 | return 0; | |
3418 | } | |
3419 | ||
3420 | ret = bus_label_unescape(e); | |
3421 | if (!ret) | |
3422 | return -ENOMEM; | |
3423 | ||
3424 | *external_id = ret; | |
3425 | return 1; | |
28383ba1 | 3426 | } |
5b12334d | 3427 | |
ae095f86 LP |
3428 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3429 | int r; | |
3430 | ||
3431 | assert_return(bus, -EINVAL); | |
ae095f86 | 3432 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3433 | |
3434 | if (!bus->is_kernel) | |
15411c0c | 3435 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3436 | |
3437 | if (!BUS_IS_OPEN(bus->state)) | |
3438 | return -ENOTCONN; | |
ae095f86 | 3439 | |
bd746b8b LP |
3440 | if (bus->rqueue_size > 0) |
3441 | return -EBUSY; | |
3442 | ||
14f862a5 LP |
3443 | if (bus->wqueue_size > 0) |
3444 | return -EBUSY; | |
3445 | ||
ae095f86 LP |
3446 | r = bus_kernel_try_close(bus); |
3447 | if (r < 0) | |
3448 | return r; | |
3449 | ||
3450 | sd_bus_close(bus); | |
3451 | return 0; | |
3452 | } | |
5972fe95 | 3453 | |
455971c1 | 3454 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3455 | assert_return(bus, -EINVAL); |
455971c1 | 3456 | assert_return(description, -EINVAL); |
f4b2933e | 3457 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3458 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3459 | ||
455971c1 | 3460 | *description = bus->description; |
5972fe95 LP |
3461 | return 0; |
3462 | } | |
fe3f22d1 DK |
3463 | |
3464 | int bus_get_root_path(sd_bus *bus) { | |
3465 | int r; | |
3466 | ||
3467 | if (bus->cgroup_root) | |
3468 | return 0; | |
3469 | ||
3470 | r = cg_get_root_path(&bus->cgroup_root); | |
3471 | if (r == -ENOENT) { | |
3472 | bus->cgroup_root = strdup("/"); | |
3473 | if (!bus->cgroup_root) | |
3474 | return -ENOMEM; | |
3475 | ||
3476 | r = 0; | |
3477 | } | |
3478 | ||
3479 | return r; | |
3480 | } | |
3acc1daf LP |
3481 | |
3482 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3483 | int r; | |
3484 | ||
3485 | assert_return(bus, -EINVAL); | |
3486 | assert_return(scope, -EINVAL); | |
3487 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3488 | ||
3489 | if (bus->is_kernel) { | |
3490 | _cleanup_free_ char *n = NULL; | |
3491 | const char *dash; | |
3492 | ||
3493 | r = bus_kernel_get_bus_name(bus, &n); | |
3494 | if (r < 0) | |
3495 | return r; | |
3496 | ||
3497 | if (streq(n, "0-system")) { | |
3498 | *scope = "system"; | |
5b820358 | 3499 | return 0; |
3acc1daf LP |
3500 | } |
3501 | ||
3502 | dash = strchr(n, '-'); | |
d2df88ff | 3503 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3504 | *scope = "user"; |
5b820358 | 3505 | return 0; |
3acc1daf LP |
3506 | } |
3507 | } | |
3508 | ||
3509 | if (bus->is_user) { | |
3510 | *scope = "user"; | |
5b820358 | 3511 | return 0; |
3acc1daf LP |
3512 | } |
3513 | ||
3514 | if (bus->is_system) { | |
3515 | *scope = "system"; | |
5b820358 LP |
3516 | return 0; |
3517 | } | |
3518 | ||
3519 | return -ENODATA; | |
3520 | } | |
3521 | ||
3522 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3523 | ||
3524 | assert_return(bus, -EINVAL); | |
3525 | assert_return(address, -EINVAL); | |
3526 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3527 | ||
3528 | if (bus->address) { | |
3529 | *address = bus->address; | |
3530 | return 0; | |
3acc1daf LP |
3531 | } |
3532 | ||
3533 | return -ENODATA; | |
3534 | } | |
224b3787 | 3535 | |
882897af | 3536 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3537 | assert_return(bus, -EINVAL); |
3538 | assert_return(mask, -EINVAL); | |
3539 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3540 | ||
3541 | *mask = bus->creds_mask; | |
3542 | return 0; | |
3543 | } | |
3544 | ||
882897af | 3545 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3546 | assert_return(bus, -EINVAL); |
3547 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3548 | ||
3549 | return bus->bus_client; | |
3550 | } | |
3551 | ||
882897af | 3552 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3553 | assert_return(bus, -EINVAL); |
3554 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3555 | ||
3556 | return bus->is_server; | |
3557 | } | |
3558 | ||
882897af | 3559 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3560 | assert_return(bus, -EINVAL); |
3561 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3562 | ||
3563 | return bus->anonymous_auth; | |
3564 | } | |
3565 | ||
882897af | 3566 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3567 | assert_return(bus, -EINVAL); |
3568 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3569 | ||
3570 | return bus->trusted; | |
3571 | } | |
3572 | ||
882897af | 3573 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3574 | assert_return(bus, -EINVAL); |
3575 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3576 | ||
3577 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3578 | } |