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de1c301e LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <endian.h> | |
de1c301e LP |
23 | #include <stdlib.h> |
24 | #include <unistd.h> | |
25 | #include <netdb.h> | |
0a6f50c0 | 26 | #include <poll.h> |
63edf05e | 27 | #include <sys/mman.h> |
45fbe937 | 28 | #include <pthread.h> |
de1c301e LP |
29 | |
30 | #include "util.h" | |
31 | #include "macro.h" | |
2fd9ae2e | 32 | #include "strv.h" |
6c03089c | 33 | #include "missing.h" |
ab9001a1 | 34 | #include "def.h" |
af08d2f9 | 35 | #include "cgroup-util.h" |
f01de965 | 36 | #include "bus-label.h" |
de1c301e LP |
37 | |
38 | #include "sd-bus.h" | |
39 | #include "bus-internal.h" | |
40 | #include "bus-message.h" | |
41 | #include "bus-type.h" | |
a7e3212d | 42 | #include "bus-socket.h" |
6629161f | 43 | #include "bus-kernel.h" |
392d5b37 | 44 | #include "bus-control.h" |
992c052c | 45 | #include "bus-objects.h" |
40ca29a1 | 46 | #include "bus-util.h" |
a7893c6b | 47 | #include "bus-container.h" |
0461f8cd | 48 | #include "bus-protocol.h" |
8f8f05a9 | 49 | #include "bus-track.h" |
19befb2d | 50 | #include "bus-slot.h" |
de1c301e | 51 | |
e3017af9 | 52 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
53 | static int attach_io_events(sd_bus *b); |
54 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 55 | |
f54514f3 LP |
56 | static void bus_close_fds(sd_bus *b) { |
57 | assert(b); | |
58 | ||
1e05d493 LP |
59 | detach_io_events(b); |
60 | ||
f54514f3 | 61 | if (b->input_fd >= 0) |
03e334a1 | 62 | safe_close(b->input_fd); |
f54514f3 LP |
63 | |
64 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
03e334a1 | 65 | safe_close(b->output_fd); |
f54514f3 LP |
66 | |
67 | b->input_fd = b->output_fd = -1; | |
68 | } | |
69 | ||
0e586eae | 70 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
71 | assert(b); |
72 | ||
f389bf15 LP |
73 | while (b->rqueue_size > 0) |
74 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
75 | ||
0e586eae | 76 | free(b->rqueue); |
f389bf15 LP |
77 | b->rqueue = NULL; |
78 | b->rqueue_allocated = 0; | |
0e586eae | 79 | |
f389bf15 LP |
80 | while (b->wqueue_size > 0) |
81 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 82 | |
f389bf15 LP |
83 | free(b->wqueue); |
84 | b->wqueue = NULL; | |
85 | b->wqueue_allocated = 0; | |
0e586eae LP |
86 | } |
87 | ||
de1c301e | 88 | static void bus_free(sd_bus *b) { |
19befb2d | 89 | sd_bus_slot *s; |
de1c301e LP |
90 | |
91 | assert(b); | |
8f8f05a9 LP |
92 | assert(!b->track_queue); |
93 | ||
19befb2d LP |
94 | b->state = BUS_CLOSED; |
95 | ||
40ca29a1 LP |
96 | sd_bus_detach_event(b); |
97 | ||
19befb2d LP |
98 | while ((s = b->slots)) { |
99 | /* At this point only floating slots can still be | |
100 | * around, because the non-floating ones keep a | |
101 | * reference to the bus, and we thus couldn't be | |
102 | * destructing right now... We forcibly disconnect the | |
103 | * slots here, so that they still can be referenced by | |
104 | * apps, but are dead. */ | |
105 | ||
106 | assert(s->floating); | |
107 | bus_slot_disconnect(s); | |
108 | sd_bus_slot_unref(s); | |
109 | } | |
110 | ||
f4d140e9 LP |
111 | if (b->default_bus_ptr) |
112 | *b->default_bus_ptr = NULL; | |
113 | ||
f54514f3 | 114 | bus_close_fds(b); |
de1c301e | 115 | |
63edf05e LP |
116 | if (b->kdbus_buffer) |
117 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
118 | ||
de1c301e | 119 | free(b->rbuffer); |
89ffcd2a | 120 | free(b->unique_name); |
2181a7f5 | 121 | free(b->auth_buffer); |
89ffcd2a | 122 | free(b->address); |
e9a967f9 | 123 | free(b->kernel); |
a7893c6b | 124 | free(b->machine); |
8a0e0ed9 | 125 | free(b->fake_label); |
751bc6ac | 126 | free(b->cgroup_root); |
455971c1 | 127 | free(b->description); |
89ffcd2a | 128 | |
2fd9ae2e LP |
129 | free(b->exec_path); |
130 | strv_free(b->exec_argv); | |
131 | ||
2c93b4ef LP |
132 | close_many(b->fds, b->n_fds); |
133 | free(b->fds); | |
134 | ||
0e586eae | 135 | bus_reset_queues(b); |
de1c301e | 136 | |
c9fe4af7 | 137 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 138 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 139 | |
75a0da95 | 140 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
141 | bus_match_free(&b->match_callbacks); |
142 | ||
29ddb38f LP |
143 | hashmap_free_free(b->vtable_methods); |
144 | hashmap_free_free(b->vtable_properties); | |
145 | ||
19befb2d | 146 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
147 | hashmap_free(b->nodes); |
148 | ||
bc7fd8cd LP |
149 | bus_kernel_flush_memfd(b); |
150 | ||
45fbe937 LP |
151 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
152 | ||
de1c301e LP |
153 | free(b); |
154 | } | |
155 | ||
d9f644e2 | 156 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
157 | sd_bus *r; |
158 | ||
d6888822 | 159 | assert_return(ret, -EINVAL); |
021a1e78 | 160 | |
de1c301e LP |
161 | r = new0(sd_bus, 1); |
162 | if (!r) | |
021a1e78 | 163 | return -ENOMEM; |
de1c301e | 164 | |
e4ee6e5c | 165 | r->n_ref = REFCNT_INIT; |
e82c9509 | 166 | r->input_fd = r->output_fd = -1; |
de1c301e | 167 | r->message_version = 1; |
3310dfd5 | 168 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 169 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 170 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 171 | r->original_pid = getpid(); |
de1c301e | 172 | |
45fbe937 LP |
173 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
174 | ||
de1c301e LP |
175 | /* We guarantee that wqueue always has space for at least one |
176 | * entry */ | |
821e0756 | 177 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 178 | free(r); |
021a1e78 | 179 | return -ENOMEM; |
de1c301e LP |
180 | } |
181 | ||
021a1e78 LP |
182 | *ret = r; |
183 | return 0; | |
184 | } | |
185 | ||
d9f644e2 | 186 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
187 | char *a; |
188 | ||
d6888822 LP |
189 | assert_return(bus, -EINVAL); |
190 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
191 | assert_return(address, -EINVAL); | |
192 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
193 | |
194 | a = strdup(address); | |
195 | if (!a) | |
196 | return -ENOMEM; | |
197 | ||
198 | free(bus->address); | |
199 | bus->address = a; | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
d9f644e2 | 204 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
205 | assert_return(bus, -EINVAL); |
206 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
207 | assert_return(input_fd >= 0, -EINVAL); | |
208 | assert_return(output_fd >= 0, -EINVAL); | |
209 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 210 | |
e82c9509 LP |
211 | bus->input_fd = input_fd; |
212 | bus->output_fd = output_fd; | |
021a1e78 LP |
213 | return 0; |
214 | } | |
215 | ||
d9f644e2 | 216 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
217 | char *p, **a; |
218 | ||
d6888822 LP |
219 | assert_return(bus, -EINVAL); |
220 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
221 | assert_return(path, -EINVAL); | |
222 | assert_return(!strv_isempty(argv), -EINVAL); | |
223 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
224 | |
225 | p = strdup(path); | |
226 | if (!p) | |
227 | return -ENOMEM; | |
228 | ||
229 | a = strv_copy(argv); | |
230 | if (!a) { | |
231 | free(p); | |
232 | return -ENOMEM; | |
233 | } | |
234 | ||
235 | free(bus->exec_path); | |
236 | strv_free(bus->exec_argv); | |
237 | ||
238 | bus->exec_path = p; | |
239 | bus->exec_argv = a; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
d9f644e2 | 244 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
245 | assert_return(bus, -EINVAL); |
246 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
247 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 248 | |
94bbf1ba | 249 | bus->bus_client = !!b; |
021a1e78 LP |
250 | return 0; |
251 | } | |
252 | ||
09365592 LP |
253 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
254 | assert_return(bus, -EINVAL); | |
255 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
256 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
257 | ||
258 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
259 | return 0; | |
260 | } | |
261 | ||
d9f644e2 | 262 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
263 | assert_return(bus, -EINVAL); |
264 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
265 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 266 | |
264ad849 LP |
267 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
268 | return 0; | |
269 | } | |
270 | ||
4fc31988 | 271 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 272 | uint64_t new_flags; |
16be4368 | 273 | assert_return(bus, -EINVAL); |
b5dae4c7 | 274 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
275 | assert_return(!bus_pid_changed(bus), -ECHILD); |
276 | ||
b5dae4c7 LP |
277 | new_flags = bus->attach_flags; |
278 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
279 | ||
280 | if (bus->attach_flags == new_flags) | |
281 | return 0; | |
282 | ||
283 | bus->attach_flags = new_flags; | |
284 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
285 | bus_kernel_realize_attach_flags(bus); | |
286 | ||
16be4368 KS |
287 | return 0; |
288 | } | |
289 | ||
b5dae4c7 LP |
290 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
291 | uint64_t new_flags; | |
292 | ||
16be4368 | 293 | assert_return(bus, -EINVAL); |
95c4fe82 | 294 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 295 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
296 | assert_return(!bus_pid_changed(bus), -ECHILD); |
297 | ||
b5dae4c7 LP |
298 | if (b) |
299 | bus->creds_mask |= mask; | |
300 | else | |
301 | bus->creds_mask &= ~mask; | |
302 | ||
49b832c5 | 303 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
304 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
305 | ||
306 | /* Make sure we don't lose the timestamp flag */ | |
307 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
308 | if (bus->attach_flags == new_flags) | |
309 | return 0; | |
49b832c5 | 310 | |
b5dae4c7 LP |
311 | bus->attach_flags = new_flags; |
312 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
313 | bus_kernel_realize_attach_flags(bus); | |
314 | ||
315 | return 0; | |
021a1e78 | 316 | } |
de1c301e | 317 | |
d9f644e2 | 318 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
319 | assert_return(bus, -EINVAL); |
320 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
321 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
322 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
323 | |
324 | bus->is_server = !!b; | |
98178d39 | 325 | bus->server_id = server_id; |
2181a7f5 LP |
326 | return 0; |
327 | } | |
328 | ||
d9f644e2 | 329 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
330 | assert_return(bus, -EINVAL); |
331 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
332 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
333 | |
334 | bus->anonymous_auth = !!b; | |
335 | return 0; | |
336 | } | |
337 | ||
adacb957 LP |
338 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
339 | assert_return(bus, -EINVAL); | |
340 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
341 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
342 | ||
343 | bus->trusted = !!b; | |
344 | return 0; | |
345 | } | |
346 | ||
455971c1 | 347 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 348 | assert_return(bus, -EINVAL); |
5972fe95 LP |
349 | assert_return(bus->state == BUS_UNSET, -EPERM); |
350 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
351 | ||
d1b91c99 | 352 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
353 | } |
354 | ||
c0765ddb LP |
355 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
356 | assert_return(bus, -EINVAL); | |
357 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
358 | ||
359 | bus->allow_interactive_authorization = !!b; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
364 | assert_return(bus, -EINVAL); | |
365 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
366 | ||
367 | return bus->allow_interactive_authorization; | |
368 | } | |
369 | ||
ebcf1f97 | 370 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e LP |
371 | const char *s; |
372 | int r; | |
373 | ||
374 | assert(bus); | |
c99c09a2 | 375 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e LP |
376 | assert(reply); |
377 | ||
40ca29a1 | 378 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
379 | if (r > 0) |
380 | return -r; | |
eb01ba5d | 381 | |
de1c301e LP |
382 | r = sd_bus_message_read(reply, "s", &s); |
383 | if (r < 0) | |
384 | return r; | |
385 | ||
dafb7591 LP |
386 | if (!service_name_is_valid(s) || s[0] != ':') |
387 | return -EBADMSG; | |
388 | ||
de1c301e LP |
389 | bus->unique_name = strdup(s); |
390 | if (!bus->unique_name) | |
391 | return -ENOMEM; | |
392 | ||
c99c09a2 LP |
393 | if (bus->state == BUS_HELLO) |
394 | bus->state = BUS_RUNNING; | |
dafb7591 | 395 | |
de1c301e LP |
396 | return 1; |
397 | } | |
398 | ||
399 | static int bus_send_hello(sd_bus *bus) { | |
400 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
401 | int r; | |
402 | ||
403 | assert(bus); | |
404 | ||
6629161f | 405 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
406 | return 0; |
407 | ||
de1c301e LP |
408 | r = sd_bus_message_new_method_call( |
409 | bus, | |
151b9b96 | 410 | &m, |
de1c301e | 411 | "org.freedesktop.DBus", |
a7639e37 | 412 | "/org/freedesktop/DBus", |
de1c301e | 413 | "org.freedesktop.DBus", |
151b9b96 | 414 | "Hello"); |
de1c301e LP |
415 | if (r < 0) |
416 | return r; | |
417 | ||
19befb2d | 418 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
419 | } |
420 | ||
a7e3212d | 421 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
422 | assert(bus); |
423 | ||
f08838da | 424 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 425 | bus->state = BUS_HELLO; |
e3017af9 | 426 | return 1; |
de1c301e LP |
427 | } |
428 | ||
429 | bus->state = BUS_RUNNING; | |
e3017af9 | 430 | return 1; |
de1c301e LP |
431 | } |
432 | ||
433 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 434 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
435 | const char *a; |
436 | char *r = NULL; | |
437 | ||
438 | assert(p); | |
439 | assert(*p); | |
de1c301e LP |
440 | assert(value); |
441 | ||
2fd9ae2e LP |
442 | if (key) { |
443 | l = strlen(key); | |
444 | if (strncmp(*p, key, l) != 0) | |
445 | return 0; | |
de1c301e | 446 | |
2fd9ae2e LP |
447 | if ((*p)[l] != '=') |
448 | return 0; | |
de1c301e | 449 | |
2fd9ae2e LP |
450 | if (*value) |
451 | return -EINVAL; | |
de1c301e | 452 | |
2fd9ae2e LP |
453 | a = *p + l + 1; |
454 | } else | |
455 | a = *p; | |
456 | ||
457 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 458 | char c; |
de1c301e LP |
459 | |
460 | if (*a == '%') { | |
461 | int x, y; | |
462 | ||
463 | x = unhexchar(a[1]); | |
464 | if (x < 0) { | |
465 | free(r); | |
466 | return x; | |
467 | } | |
468 | ||
469 | y = unhexchar(a[2]); | |
470 | if (y < 0) { | |
471 | free(r); | |
472 | return y; | |
473 | } | |
474 | ||
de1c301e | 475 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
476 | a += 3; |
477 | } else { | |
de1c301e | 478 | c = *a; |
89ffcd2a LP |
479 | a++; |
480 | } | |
de1c301e | 481 | |
821e0756 | 482 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 483 | return -ENOMEM; |
de1c301e | 484 | |
de1c301e LP |
485 | r[n++] = c; |
486 | } | |
487 | ||
89ffcd2a LP |
488 | if (!r) { |
489 | r = strdup(""); | |
490 | if (!r) | |
491 | return -ENOMEM; | |
492 | } else | |
493 | r[n] = 0; | |
494 | ||
495 | if (*a == ',') | |
496 | a++; | |
497 | ||
de1c301e | 498 | *p = a; |
2fd9ae2e LP |
499 | |
500 | free(*value); | |
de1c301e | 501 | *value = r; |
2fd9ae2e | 502 | |
de1c301e LP |
503 | return 1; |
504 | } | |
505 | ||
506 | static void skip_address_key(const char **p) { | |
507 | assert(p); | |
508 | assert(*p); | |
509 | ||
89ffcd2a LP |
510 | *p += strcspn(*p, ","); |
511 | ||
512 | if (**p == ',') | |
513 | (*p) ++; | |
de1c301e LP |
514 | } |
515 | ||
2fd9ae2e LP |
516 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
517 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
518 | size_t l; | |
de1c301e LP |
519 | int r; |
520 | ||
521 | assert(b); | |
2fd9ae2e LP |
522 | assert(p); |
523 | assert(*p); | |
524 | assert(guid); | |
de1c301e | 525 | |
2fd9ae2e LP |
526 | while (**p != 0 && **p != ';') { |
527 | r = parse_address_key(p, "guid", guid); | |
528 | if (r < 0) | |
529 | return r; | |
530 | else if (r > 0) | |
531 | continue; | |
de1c301e | 532 | |
2fd9ae2e LP |
533 | r = parse_address_key(p, "path", &path); |
534 | if (r < 0) | |
535 | return r; | |
536 | else if (r > 0) | |
537 | continue; | |
de1c301e | 538 | |
2fd9ae2e LP |
539 | r = parse_address_key(p, "abstract", &abstract); |
540 | if (r < 0) | |
541 | return r; | |
542 | else if (r > 0) | |
543 | continue; | |
de1c301e | 544 | |
2fd9ae2e LP |
545 | skip_address_key(p); |
546 | } | |
de1c301e | 547 | |
2fd9ae2e LP |
548 | if (!path && !abstract) |
549 | return -EINVAL; | |
de1c301e | 550 | |
2fd9ae2e LP |
551 | if (path && abstract) |
552 | return -EINVAL; | |
553 | ||
554 | if (path) { | |
555 | l = strlen(path); | |
556 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
557 | return -E2BIG; | |
de1c301e | 558 | |
2fd9ae2e LP |
559 | b->sockaddr.un.sun_family = AF_UNIX; |
560 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
561 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
562 | } else if (abstract) { | |
563 | l = strlen(abstract); | |
564 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
565 | return -E2BIG; | |
566 | ||
567 | b->sockaddr.un.sun_family = AF_UNIX; | |
568 | b->sockaddr.un.sun_path[0] = 0; | |
569 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
570 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
571 | } | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
577 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 578 | int r; |
b92bea5d ZJS |
579 | struct addrinfo *result, hints = { |
580 | .ai_socktype = SOCK_STREAM, | |
581 | .ai_flags = AI_ADDRCONFIG, | |
582 | }; | |
2fd9ae2e LP |
583 | |
584 | assert(b); | |
585 | assert(p); | |
586 | assert(*p); | |
587 | assert(guid); | |
588 | ||
589 | while (**p != 0 && **p != ';') { | |
590 | r = parse_address_key(p, "guid", guid); | |
591 | if (r < 0) | |
592 | return r; | |
593 | else if (r > 0) | |
594 | continue; | |
595 | ||
596 | r = parse_address_key(p, "host", &host); | |
597 | if (r < 0) | |
598 | return r; | |
599 | else if (r > 0) | |
600 | continue; | |
601 | ||
602 | r = parse_address_key(p, "port", &port); | |
603 | if (r < 0) | |
604 | return r; | |
605 | else if (r > 0) | |
606 | continue; | |
607 | ||
608 | r = parse_address_key(p, "family", &family); | |
609 | if (r < 0) | |
610 | return r; | |
611 | else if (r > 0) | |
612 | continue; | |
613 | ||
614 | skip_address_key(p); | |
615 | } | |
616 | ||
617 | if (!host || !port) | |
618 | return -EINVAL; | |
619 | ||
2fd9ae2e LP |
620 | if (family) { |
621 | if (streq(family, "ipv4")) | |
622 | hints.ai_family = AF_INET; | |
623 | else if (streq(family, "ipv6")) | |
624 | hints.ai_family = AF_INET6; | |
625 | else | |
626 | return -EINVAL; | |
627 | } | |
628 | ||
629 | r = getaddrinfo(host, port, &hints, &result); | |
630 | if (r == EAI_SYSTEM) | |
631 | return -errno; | |
632 | else if (r != 0) | |
633 | return -EADDRNOTAVAIL; | |
634 | ||
635 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
636 | b->sockaddr_size = result->ai_addrlen; | |
637 | ||
638 | freeaddrinfo(result); | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
644 | char *path = NULL; | |
645 | unsigned n_argv = 0, j; | |
646 | char **argv = NULL; | |
821e0756 | 647 | size_t allocated = 0; |
2fd9ae2e LP |
648 | int r; |
649 | ||
650 | assert(b); | |
651 | assert(p); | |
652 | assert(*p); | |
653 | assert(guid); | |
654 | ||
655 | while (**p != 0 && **p != ';') { | |
656 | r = parse_address_key(p, "guid", guid); | |
657 | if (r < 0) | |
658 | goto fail; | |
659 | else if (r > 0) | |
660 | continue; | |
661 | ||
662 | r = parse_address_key(p, "path", &path); | |
663 | if (r < 0) | |
664 | goto fail; | |
665 | else if (r > 0) | |
666 | continue; | |
667 | ||
668 | if (startswith(*p, "argv")) { | |
669 | unsigned ul; | |
670 | ||
671 | errno = 0; | |
672 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 673 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
674 | r = -EINVAL; |
675 | goto fail; | |
676 | } | |
677 | ||
678 | (*p) ++; | |
679 | ||
680 | if (ul >= n_argv) { | |
821e0756 | 681 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
682 | r = -ENOMEM; |
683 | goto fail; | |
684 | } | |
685 | ||
2fd9ae2e LP |
686 | n_argv = ul + 1; |
687 | } | |
688 | ||
689 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 690 | if (r < 0) |
2fd9ae2e | 691 | goto fail; |
de1c301e | 692 | |
2fd9ae2e | 693 | continue; |
de1c301e LP |
694 | } |
695 | ||
2fd9ae2e LP |
696 | skip_address_key(p); |
697 | } | |
de1c301e | 698 | |
5a0f6033 LP |
699 | if (!path) { |
700 | r = -EINVAL; | |
2fd9ae2e | 701 | goto fail; |
5a0f6033 | 702 | } |
de1c301e | 703 | |
2fd9ae2e LP |
704 | /* Make sure there are no holes in the array, with the |
705 | * exception of argv[0] */ | |
706 | for (j = 1; j < n_argv; j++) | |
707 | if (!argv[j]) { | |
708 | r = -EINVAL; | |
709 | goto fail; | |
710 | } | |
711 | ||
712 | if (argv && argv[0] == NULL) { | |
713 | argv[0] = strdup(path); | |
714 | if (!argv[0]) { | |
715 | r = -ENOMEM; | |
716 | goto fail; | |
717 | } | |
718 | } | |
de1c301e | 719 | |
2fd9ae2e LP |
720 | b->exec_path = path; |
721 | b->exec_argv = argv; | |
722 | return 0; | |
de1c301e | 723 | |
2fd9ae2e LP |
724 | fail: |
725 | for (j = 0; j < n_argv; j++) | |
726 | free(argv[j]); | |
727 | ||
728 | free(argv); | |
729 | free(path); | |
730 | return r; | |
731 | } | |
732 | ||
6629161f LP |
733 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
734 | _cleanup_free_ char *path = NULL; | |
735 | int r; | |
736 | ||
737 | assert(b); | |
738 | assert(p); | |
739 | assert(*p); | |
740 | assert(guid); | |
741 | ||
742 | while (**p != 0 && **p != ';') { | |
743 | r = parse_address_key(p, "guid", guid); | |
744 | if (r < 0) | |
745 | return r; | |
746 | else if (r > 0) | |
747 | continue; | |
748 | ||
749 | r = parse_address_key(p, "path", &path); | |
750 | if (r < 0) | |
751 | return r; | |
752 | else if (r > 0) | |
753 | continue; | |
754 | ||
755 | skip_address_key(p); | |
756 | } | |
757 | ||
758 | if (!path) | |
759 | return -EINVAL; | |
760 | ||
761 | free(b->kernel); | |
762 | b->kernel = path; | |
763 | path = NULL; | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
bc9fd78c | 768 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 769 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
770 | int r; |
771 | ||
772 | assert(b); | |
773 | assert(p); | |
774 | assert(*p); | |
775 | assert(guid); | |
776 | ||
777 | while (**p != 0 && **p != ';') { | |
778 | r = parse_address_key(p, "guid", guid); | |
779 | if (r < 0) | |
780 | return r; | |
781 | else if (r > 0) | |
782 | continue; | |
783 | ||
784 | r = parse_address_key(p, "machine", &machine); | |
785 | if (r < 0) | |
786 | return r; | |
787 | else if (r > 0) | |
788 | continue; | |
789 | ||
ee502e0c LP |
790 | r = parse_address_key(p, "pid", &pid); |
791 | if (r < 0) | |
792 | return r; | |
793 | else if (r > 0) | |
794 | continue; | |
795 | ||
a7893c6b LP |
796 | skip_address_key(p); |
797 | } | |
798 | ||
ee502e0c | 799 | if (!machine == !pid) |
a7893c6b LP |
800 | return -EINVAL; |
801 | ||
ee502e0c LP |
802 | if (machine) { |
803 | if (!machine_name_is_valid(machine)) | |
804 | return -EINVAL; | |
b6741478 | 805 | |
ee502e0c LP |
806 | free(b->machine); |
807 | b->machine = machine; | |
808 | machine = NULL; | |
809 | } else { | |
810 | free(b->machine); | |
811 | b->machine = NULL; | |
812 | } | |
813 | ||
814 | if (pid) { | |
815 | r = parse_pid(pid, &b->nspid); | |
816 | if (r < 0) | |
817 | return r; | |
818 | } else | |
819 | b->nspid = 0; | |
a7893c6b LP |
820 | |
821 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
822 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
823 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
824 | |
825 | return 0; | |
826 | } | |
827 | ||
bc9fd78c | 828 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 829 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
bc9fd78c LP |
830 | int r; |
831 | ||
832 | assert(b); | |
833 | assert(p); | |
834 | assert(*p); | |
835 | assert(guid); | |
836 | ||
837 | while (**p != 0 && **p != ';') { | |
838 | r = parse_address_key(p, "guid", guid); | |
839 | if (r < 0) | |
840 | return r; | |
841 | else if (r > 0) | |
842 | continue; | |
843 | ||
844 | r = parse_address_key(p, "machine", &machine); | |
845 | if (r < 0) | |
846 | return r; | |
847 | else if (r > 0) | |
848 | continue; | |
849 | ||
ee502e0c LP |
850 | r = parse_address_key(p, "pid", &pid); |
851 | if (r < 0) | |
852 | return r; | |
853 | else if (r > 0) | |
854 | continue; | |
855 | ||
bc9fd78c LP |
856 | skip_address_key(p); |
857 | } | |
858 | ||
ee502e0c | 859 | if (!machine == !pid) |
bc9fd78c LP |
860 | return -EINVAL; |
861 | ||
ee502e0c LP |
862 | if (machine) { |
863 | if (!machine_name_is_valid(machine)) | |
864 | return -EINVAL; | |
bc9fd78c | 865 | |
ee502e0c LP |
866 | free(b->machine); |
867 | b->machine = machine; | |
868 | machine = NULL; | |
869 | } else { | |
870 | free(b->machine); | |
871 | b->machine = NULL; | |
872 | } | |
873 | ||
874 | if (pid) { | |
875 | r = parse_pid(pid, &b->nspid); | |
876 | if (r < 0) | |
877 | return r; | |
878 | } else | |
879 | b->nspid = 0; | |
bc9fd78c LP |
880 | |
881 | free(b->kernel); | |
63cc4c31 | 882 | b->kernel = strdup("/sys/fs/kdbus/0-system/bus"); |
bc9fd78c LP |
883 | if (!b->kernel) |
884 | return -ENOMEM; | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
2fd9ae2e LP |
889 | static void bus_reset_parsed_address(sd_bus *b) { |
890 | assert(b); | |
891 | ||
892 | zero(b->sockaddr); | |
893 | b->sockaddr_size = 0; | |
894 | strv_free(b->exec_argv); | |
895 | free(b->exec_path); | |
896 | b->exec_path = NULL; | |
897 | b->exec_argv = NULL; | |
98178d39 | 898 | b->server_id = SD_ID128_NULL; |
6629161f LP |
899 | free(b->kernel); |
900 | b->kernel = NULL; | |
a7893c6b LP |
901 | free(b->machine); |
902 | b->machine = NULL; | |
ee502e0c | 903 | b->nspid = 0; |
2fd9ae2e LP |
904 | } |
905 | ||
906 | static int bus_parse_next_address(sd_bus *b) { | |
907 | _cleanup_free_ char *guid = NULL; | |
908 | const char *a; | |
909 | int r; | |
910 | ||
911 | assert(b); | |
912 | ||
913 | if (!b->address) | |
914 | return 0; | |
915 | if (b->address[b->address_index] == 0) | |
916 | return 0; | |
917 | ||
918 | bus_reset_parsed_address(b); | |
919 | ||
920 | a = b->address + b->address_index; | |
de1c301e | 921 | |
2fd9ae2e | 922 | while (*a != 0) { |
de1c301e | 923 | |
2fd9ae2e LP |
924 | if (*a == ';') { |
925 | a++; | |
926 | continue; | |
de1c301e LP |
927 | } |
928 | ||
2fd9ae2e LP |
929 | if (startswith(a, "unix:")) { |
930 | a += 5; | |
de1c301e | 931 | |
2fd9ae2e | 932 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
933 | if (r < 0) |
934 | return r; | |
2fd9ae2e | 935 | break; |
de1c301e | 936 | |
2fd9ae2e | 937 | } else if (startswith(a, "tcp:")) { |
de1c301e | 938 | |
2fd9ae2e LP |
939 | a += 4; |
940 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
941 | if (r < 0) |
942 | return r; | |
de1c301e | 943 | |
2fd9ae2e LP |
944 | break; |
945 | ||
946 | } else if (startswith(a, "unixexec:")) { | |
947 | ||
948 | a += 9; | |
949 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
950 | if (r < 0) |
951 | return r; | |
de1c301e | 952 | |
2fd9ae2e | 953 | break; |
de1c301e | 954 | |
6629161f LP |
955 | } else if (startswith(a, "kernel:")) { |
956 | ||
957 | a += 7; | |
958 | r = parse_kernel_address(b, &a, &guid); | |
959 | if (r < 0) | |
960 | return r; | |
961 | ||
a7893c6b | 962 | break; |
de33fc62 | 963 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 964 | |
146d4773 | 965 | a += 15; |
bc9fd78c LP |
966 | r = parse_container_unix_address(b, &a, &guid); |
967 | if (r < 0) | |
968 | return r; | |
969 | ||
970 | break; | |
de33fc62 | 971 | } else if (startswith(a, "x-machine-kernel:")) { |
a7893c6b | 972 | |
146d4773 | 973 | a += 17; |
bc9fd78c | 974 | r = parse_container_kernel_address(b, &a, &guid); |
a7893c6b LP |
975 | if (r < 0) |
976 | return r; | |
977 | ||
6629161f | 978 | break; |
de1c301e LP |
979 | } |
980 | ||
2fd9ae2e LP |
981 | a = strchr(a, ';'); |
982 | if (!a) | |
983 | return 0; | |
de1c301e LP |
984 | } |
985 | ||
986 | if (guid) { | |
98178d39 | 987 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
988 | if (r < 0) |
989 | return r; | |
990 | } | |
991 | ||
2fd9ae2e | 992 | b->address_index = a - b->address; |
de1c301e LP |
993 | return 1; |
994 | } | |
995 | ||
a7e3212d | 996 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
997 | int r; |
998 | ||
999 | assert(b); | |
1000 | ||
1001 | for (;;) { | |
1e05d493 | 1002 | bool skipped = false; |
2fd9ae2e | 1003 | |
1e05d493 | 1004 | bus_close_fds(b); |
a7e3212d | 1005 | |
1e05d493 | 1006 | if (b->exec_path) |
a7893c6b | 1007 | r = bus_socket_exec(b); |
ee502e0c | 1008 | else if ((b->nspid > 0 || b->machine) && b->kernel) |
bc9fd78c | 1009 | r = bus_container_connect_kernel(b); |
ee502e0c | 1010 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
bc9fd78c | 1011 | r = bus_container_connect_socket(b); |
1e05d493 | 1012 | else if (b->kernel) |
a7893c6b | 1013 | r = bus_kernel_connect(b); |
1e05d493 | 1014 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 1015 | r = bus_socket_connect(b); |
1e05d493 LP |
1016 | else |
1017 | skipped = true; | |
1018 | ||
1019 | if (!skipped) { | |
1020 | if (r >= 0) { | |
1021 | r = attach_io_events(b); | |
1022 | if (r >= 0) | |
1023 | return r; | |
1024 | } | |
6629161f | 1025 | |
2fd9ae2e LP |
1026 | b->last_connect_error = -r; |
1027 | } | |
1028 | ||
1029 | r = bus_parse_next_address(b); | |
1030 | if (r < 0) | |
1031 | return r; | |
1032 | if (r == 0) | |
1033 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
1034 | } |
1035 | } | |
1036 | ||
a7e3212d LP |
1037 | int bus_next_address(sd_bus *b) { |
1038 | assert(b); | |
1039 | ||
1040 | bus_reset_parsed_address(b); | |
1041 | return bus_start_address(b); | |
1042 | } | |
1043 | ||
021a1e78 | 1044 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1045 | struct stat st; |
021a1e78 LP |
1046 | int r; |
1047 | ||
1048 | assert(b); | |
e82c9509 LP |
1049 | assert(b->input_fd >= 0); |
1050 | assert(b->output_fd >= 0); | |
021a1e78 | 1051 | |
e82c9509 | 1052 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1053 | if (r < 0) |
1054 | return r; | |
1055 | ||
e82c9509 | 1056 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1057 | if (r < 0) |
1058 | return r; | |
1059 | ||
e82c9509 LP |
1060 | if (b->input_fd != b->output_fd) { |
1061 | r = fd_nonblock(b->output_fd, true); | |
1062 | if (r < 0) | |
1063 | return r; | |
1064 | ||
1065 | r = fd_cloexec(b->output_fd, true); | |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | } | |
1069 | ||
6629161f LP |
1070 | if (fstat(b->input_fd, &st) < 0) |
1071 | return -errno; | |
1072 | ||
1073 | if (S_ISCHR(b->input_fd)) | |
1074 | return bus_kernel_take_fd(b); | |
1075 | else | |
1076 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1077 | } |
1078 | ||
d9f644e2 | 1079 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1080 | int r; |
1081 | ||
d6888822 LP |
1082 | assert_return(bus, -EINVAL); |
1083 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1084 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1085 | |
1086 | bus->state = BUS_OPENING; | |
1087 | ||
2181a7f5 LP |
1088 | if (bus->is_server && bus->bus_client) |
1089 | return -EINVAL; | |
1090 | ||
e82c9509 | 1091 | if (bus->input_fd >= 0) |
021a1e78 | 1092 | r = bus_start_fd(bus); |
a7893c6b | 1093 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1094 | r = bus_start_address(bus); |
021a1e78 LP |
1095 | else |
1096 | return -EINVAL; | |
1097 | ||
db9bb83f LP |
1098 | if (r < 0) { |
1099 | sd_bus_close(bus); | |
021a1e78 | 1100 | return r; |
db9bb83f | 1101 | } |
021a1e78 LP |
1102 | |
1103 | return bus_send_hello(bus); | |
1104 | } | |
1105 | ||
af08d2f9 LP |
1106 | _public_ int sd_bus_open(sd_bus **ret) { |
1107 | const char *e; | |
1108 | sd_bus *b; | |
1109 | int r; | |
1110 | ||
1111 | assert_return(ret, -EINVAL); | |
1112 | ||
1113 | /* Let's connect to the starter bus if it is set, and | |
1114 | * otherwise to the bus that is appropropriate for the scope | |
1115 | * we are running in */ | |
1116 | ||
1117 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1118 | if (e) { | |
1119 | if (streq(e, "system")) | |
1120 | return sd_bus_open_system(ret); | |
09365592 | 1121 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1122 | return sd_bus_open_user(ret); |
1123 | } | |
1124 | ||
1125 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1126 | if (!e) { | |
1127 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1128 | return sd_bus_open_user(ret); | |
1129 | else | |
1130 | return sd_bus_open_system(ret); | |
1131 | } | |
1132 | ||
1133 | r = sd_bus_new(&b); | |
1134 | if (r < 0) | |
1135 | return r; | |
1136 | ||
1137 | r = sd_bus_set_address(b, e); | |
1138 | if (r < 0) | |
1139 | goto fail; | |
1140 | ||
1141 | b->bus_client = true; | |
1142 | ||
1143 | /* We don't know whether the bus is trusted or not, so better | |
1144 | * be safe, and authenticate everything */ | |
1145 | b->trusted = false; | |
cf226cfc LP |
1146 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1147 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1148 | |
1149 | r = sd_bus_start(b); | |
1150 | if (r < 0) | |
1151 | goto fail; | |
1152 | ||
1153 | *ret = b; | |
1154 | return 0; | |
1155 | ||
1156 | fail: | |
1157 | bus_free(b); | |
1158 | return r; | |
1159 | } | |
1160 | ||
09365592 | 1161 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1162 | const char *e; |
09365592 LP |
1163 | assert(b); |
1164 | ||
1165 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1166 | if (e) | |
1167 | return sd_bus_set_address(b, e); | |
1168 | ||
e3afaf6b | 1169 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1170 | } |
1171 | ||
1172 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1173 | sd_bus *b; |
1174 | int r; | |
1175 | ||
d6888822 | 1176 | assert_return(ret, -EINVAL); |
de1c301e | 1177 | |
021a1e78 LP |
1178 | r = sd_bus_new(&b); |
1179 | if (r < 0) | |
1180 | return r; | |
1181 | ||
09365592 | 1182 | r = bus_set_address_system(b); |
e3dd987c LP |
1183 | if (r < 0) |
1184 | goto fail; | |
de1c301e | 1185 | |
94bbf1ba | 1186 | b->bus_client = true; |
5972fe95 | 1187 | b->is_system = true; |
021a1e78 | 1188 | |
adacb957 LP |
1189 | /* Let's do per-method access control on the system bus. We |
1190 | * need the caller's UID and capability set for that. */ | |
1191 | b->trusted = false; | |
1192 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1193 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
adacb957 | 1194 | |
021a1e78 LP |
1195 | r = sd_bus_start(b); |
1196 | if (r < 0) | |
1197 | goto fail; | |
de1c301e LP |
1198 | |
1199 | *ret = b; | |
1200 | return 0; | |
021a1e78 LP |
1201 | |
1202 | fail: | |
1203 | bus_free(b); | |
1204 | return r; | |
de1c301e LP |
1205 | } |
1206 | ||
09365592 | 1207 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1208 | const char *e; |
de1c301e | 1209 | |
09365592 | 1210 | assert(b); |
021a1e78 | 1211 | |
6c03089c | 1212 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1213 | if (e) |
1214 | return sd_bus_set_address(b, e); | |
1215 | ||
1216 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
de1c301e | 1217 | if (e) { |
09365592 | 1218 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1219 | |
09365592 LP |
1220 | ee = bus_address_escape(e); |
1221 | if (!ee) | |
1222 | return -ENOMEM; | |
e3dd987c | 1223 | |
626851be | 1224 | #ifdef ENABLE_KDBUS |
e3afaf6b | 1225 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT ";" UNIX_USER_BUS_ADDRESS_FMT, getuid(), ee); |
626851be | 1226 | #else |
e3afaf6b | 1227 | (void) asprintf(&b->address, UNIX_USER_BUS_ADDRESS_FMT, ee); |
626851be | 1228 | #endif |
09365592 | 1229 | } else { |
626851be | 1230 | #ifdef ENABLE_KDBUS |
e3afaf6b | 1231 | (void) asprintf(&b->address, KERNEL_USER_BUS_ADDRESS_FMT, getuid()); |
626851be | 1232 | #else |
09365592 | 1233 | return -ECONNREFUSED; |
626851be | 1234 | #endif |
de1c301e LP |
1235 | } |
1236 | ||
09365592 LP |
1237 | if (!b->address) |
1238 | return -ENOMEM; | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1244 | sd_bus *b; | |
1245 | int r; | |
1246 | ||
1247 | assert_return(ret, -EINVAL); | |
1248 | ||
1249 | r = sd_bus_new(&b); | |
1250 | if (r < 0) | |
1251 | return r; | |
1252 | ||
1253 | r = bus_set_address_user(b); | |
1254 | if (r < 0) | |
1255 | return r; | |
1256 | ||
94bbf1ba | 1257 | b->bus_client = true; |
5972fe95 | 1258 | b->is_user = true; |
de1c301e | 1259 | |
adacb957 LP |
1260 | /* We don't do any per-method access control on the user |
1261 | * bus. */ | |
1262 | b->trusted = true; | |
1263 | ||
021a1e78 | 1264 | r = sd_bus_start(b); |
2571ead1 LP |
1265 | if (r < 0) |
1266 | goto fail; | |
de1c301e LP |
1267 | |
1268 | *ret = b; | |
1269 | return 0; | |
2571ead1 LP |
1270 | |
1271 | fail: | |
021a1e78 | 1272 | bus_free(b); |
2571ead1 | 1273 | return r; |
de1c301e LP |
1274 | } |
1275 | ||
09365592 | 1276 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1277 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1278 | char *m = NULL, *c = NULL; |
0f8bd8de | 1279 | |
09365592 LP |
1280 | assert(b); |
1281 | assert(host); | |
0f8bd8de | 1282 | |
7f0d207d LP |
1283 | /* Let's see if we shall enter some container */ |
1284 | m = strchr(host, ':'); | |
1285 | if (m) { | |
1286 | m++; | |
1287 | ||
1288 | /* Let's make sure this is not a port of some kind, | |
1289 | * and is a valid machine name. */ | |
1290 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1291 | char *t; | |
1292 | ||
1293 | /* Cut out the host part */ | |
1294 | t = strndupa(host, m - host - 1); | |
1295 | e = bus_address_escape(t); | |
1296 | if (!e) | |
1297 | return -ENOMEM; | |
1298 | ||
63c372cb | 1299 | c = strjoina(",argv4=--machine=", m); |
7f0d207d LP |
1300 | } |
1301 | } | |
1302 | ||
1303 | if (!e) { | |
1304 | e = bus_address_escape(host); | |
1305 | if (!e) | |
1306 | return -ENOMEM; | |
1307 | } | |
0f8bd8de | 1308 | |
7f0d207d | 1309 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1310 | if (!b->address) |
0f8bd8de | 1311 | return -ENOMEM; |
a7893c6b | 1312 | |
09365592 LP |
1313 | return 0; |
1314 | } | |
1315 | ||
1316 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1317 | sd_bus *bus; | |
1318 | int r; | |
1319 | ||
1320 | assert_return(host, -EINVAL); | |
1321 | assert_return(ret, -EINVAL); | |
1322 | ||
a7893c6b | 1323 | r = sd_bus_new(&bus); |
09365592 | 1324 | if (r < 0) |
a7893c6b | 1325 | return r; |
a7893c6b | 1326 | |
09365592 LP |
1327 | r = bus_set_address_system_remote(bus, host); |
1328 | if (r < 0) | |
1329 | goto fail; | |
1330 | ||
a7893c6b | 1331 | bus->bus_client = true; |
09365592 | 1332 | bus->trusted = false; |
3acc1daf | 1333 | bus->is_system = true; |
a7893c6b LP |
1334 | |
1335 | r = sd_bus_start(bus); | |
09365592 LP |
1336 | if (r < 0) |
1337 | goto fail; | |
a7893c6b LP |
1338 | |
1339 | *ret = bus; | |
1340 | return 0; | |
09365592 LP |
1341 | |
1342 | fail: | |
1343 | bus_free(bus); | |
1344 | return r; | |
a7893c6b LP |
1345 | } |
1346 | ||
de33fc62 | 1347 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1348 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1349 | |
09365592 LP |
1350 | assert(b); |
1351 | assert(machine); | |
a7893c6b LP |
1352 | |
1353 | e = bus_address_escape(machine); | |
1354 | if (!e) | |
1355 | return -ENOMEM; | |
1356 | ||
9e554864 | 1357 | #ifdef ENABLE_KDBUS |
de33fc62 | 1358 | b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL); |
9e554864 | 1359 | #else |
de33fc62 | 1360 | b->address = strjoin("x-machine-unix:machine=", e, NULL); |
9e554864 | 1361 | #endif |
09365592 | 1362 | if (!b->address) |
a7893c6b | 1363 | return -ENOMEM; |
0f8bd8de | 1364 | |
09365592 LP |
1365 | return 0; |
1366 | } | |
1367 | ||
de33fc62 | 1368 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1369 | sd_bus *bus; |
1370 | int r; | |
1371 | ||
1372 | assert_return(machine, -EINVAL); | |
1373 | assert_return(ret, -EINVAL); | |
affcf189 | 1374 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1375 | |
0f8bd8de | 1376 | r = sd_bus_new(&bus); |
09365592 | 1377 | if (r < 0) |
0f8bd8de | 1378 | return r; |
0f8bd8de | 1379 | |
de33fc62 | 1380 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1381 | if (r < 0) |
1382 | goto fail; | |
1383 | ||
0f8bd8de | 1384 | bus->bus_client = true; |
09365592 | 1385 | bus->trusted = false; |
3acc1daf | 1386 | bus->is_system = true; |
0f8bd8de LP |
1387 | |
1388 | r = sd_bus_start(bus); | |
09365592 LP |
1389 | if (r < 0) |
1390 | goto fail; | |
0f8bd8de LP |
1391 | |
1392 | *ret = bus; | |
1393 | return 0; | |
09365592 LP |
1394 | |
1395 | fail: | |
1396 | bus_free(bus); | |
1397 | return r; | |
0f8bd8de LP |
1398 | } |
1399 | ||
d9f644e2 | 1400 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1401 | |
de1c301e LP |
1402 | if (!bus) |
1403 | return; | |
d5a2b9a6 LP |
1404 | if (bus->state == BUS_CLOSED) |
1405 | return; | |
1406 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1407 | return; |
1408 | ||
1409 | bus->state = BUS_CLOSED; | |
e82c9509 | 1410 | |
40ca29a1 LP |
1411 | sd_bus_detach_event(bus); |
1412 | ||
0e586eae LP |
1413 | /* Drop all queued messages so that they drop references to |
1414 | * the bus object and the bus may be freed */ | |
1415 | bus_reset_queues(bus); | |
1416 | ||
f54514f3 LP |
1417 | if (!bus->is_kernel) |
1418 | bus_close_fds(bus); | |
1419 | ||
1420 | /* We'll leave the fd open in case this is a kernel bus, since | |
1421 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1422 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1423 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1424 | } |
1425 | ||
718db961 LP |
1426 | static void bus_enter_closing(sd_bus *bus) { |
1427 | assert(bus); | |
1428 | ||
1429 | if (bus->state != BUS_OPENING && | |
1430 | bus->state != BUS_AUTHENTICATING && | |
1431 | bus->state != BUS_HELLO && | |
1432 | bus->state != BUS_RUNNING) | |
1433 | return; | |
1434 | ||
1435 | bus->state = BUS_CLOSING; | |
1436 | } | |
1437 | ||
d9f644e2 | 1438 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1439 | assert_return(bus, NULL); |
de1c301e | 1440 | |
e4ee6e5c | 1441 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1442 | |
de1c301e LP |
1443 | return bus; |
1444 | } | |
1445 | ||
d9f644e2 | 1446 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1447 | unsigned i; |
5b1bc83f LP |
1448 | |
1449 | if (!bus) | |
1450 | return NULL; | |
de1c301e | 1451 | |
f389bf15 LP |
1452 | i = REFCNT_DEC(bus->n_ref); |
1453 | if (i > 0) | |
1454 | return NULL; | |
1455 | ||
1456 | bus_free(bus); | |
de1c301e LP |
1457 | return NULL; |
1458 | } | |
1459 | ||
d9f644e2 | 1460 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1461 | |
1462 | assert_return(bus, -EINVAL); | |
1463 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1464 | |
f54514f3 | 1465 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1466 | } |
1467 | ||
d9f644e2 | 1468 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1469 | int r; |
1470 | ||
d6888822 LP |
1471 | assert_return(bus, -EINVAL); |
1472 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1473 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1474 | |
09365592 LP |
1475 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1476 | return 0; | |
1477 | ||
d728d708 | 1478 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1479 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1480 | return 0; |
1481 | ||
20902f3e | 1482 | r = bus_ensure_running(bus); |
d728d708 LP |
1483 | if (r < 0) |
1484 | return r; | |
de1c301e | 1485 | |
d728d708 LP |
1486 | return bus->can_fds; |
1487 | } | |
1488 | ||
1489 | return bus_type_is_valid(type); | |
de1c301e LP |
1490 | } |
1491 | ||
5c302692 | 1492 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1493 | int r; |
de1c301e | 1494 | |
d6888822 | 1495 | assert_return(bus, -EINVAL); |
f7fce345 | 1496 | assert_return(id, -EINVAL); |
d6888822 | 1497 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1498 | |
20902f3e | 1499 | r = bus_ensure_running(bus); |
d728d708 LP |
1500 | if (r < 0) |
1501 | return r; | |
de1c301e | 1502 | |
f7fce345 | 1503 | *id = bus->server_id; |
d728d708 | 1504 | return 0; |
de1c301e LP |
1505 | } |
1506 | ||
3df7a7e6 | 1507 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1508 | assert(b); |
de1c301e LP |
1509 | assert(m); |
1510 | ||
aea93deb LP |
1511 | if (m->sealed) { |
1512 | /* If we copy the same message to multiple | |
693eb9a2 | 1513 | * destinations, avoid using the same cookie |
aea93deb | 1514 | * numbers. */ |
693eb9a2 | 1515 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1516 | return 0; |
aea93deb | 1517 | } |
de1c301e | 1518 | |
3df7a7e6 LP |
1519 | if (timeout == 0) |
1520 | timeout = BUS_DEFAULT_TIMEOUT; | |
1521 | ||
693eb9a2 | 1522 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1523 | } |
1524 | ||
e1c433c6 | 1525 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1526 | bool remarshal = false; |
1527 | ||
e1c433c6 LP |
1528 | assert(b); |
1529 | ||
908b8a42 DH |
1530 | /* wrong packet version */ |
1531 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1532 | remarshal = true; | |
1533 | ||
1534 | /* wrong packet endianness */ | |
1535 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1536 | remarshal = true; | |
1537 | ||
1538 | /* TODO: kdbus-messages received from the kernel contain data which is | |
1539 | * not allowed to be passed to KDBUS_CMD_SEND. Therefore, we have to | |
1540 | * force remarshaling of the message. Technically, we could just | |
1541 | * recreate the kdbus message, but that is non-trivial as other parts of | |
1542 | * the message refer to m->kdbus already. This should be fixed! */ | |
1543 | if ((*m)->kdbus && (*m)->release_kdbus) | |
1544 | remarshal = true; | |
e1c433c6 | 1545 | |
908b8a42 | 1546 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1547 | } |
1548 | ||
7adc46fc LP |
1549 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1550 | assert(b); | |
1551 | assert(m); | |
1552 | ||
52cd5877 LP |
1553 | /* Fake some timestamps, if they were requested, and not |
1554 | * already initialized */ | |
1555 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1556 | if (m->realtime <= 0) | |
1557 | m->realtime = now(CLOCK_REALTIME); | |
1558 | ||
1559 | if (m->monotonic <= 0) | |
1560 | m->monotonic = now(CLOCK_MONOTONIC); | |
1561 | } | |
1562 | ||
7adc46fc LP |
1563 | /* The bus specification says the serial number cannot be 0, |
1564 | * hence let's fill something in for synthetic messages. Since | |
1565 | * synthetic messages might have a fake sender and we don't | |
1566 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1567 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1568 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1569 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1570 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1571 | } |
1572 | ||
069f5e61 | 1573 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1574 | int r; |
1575 | ||
718db961 | 1576 | assert(bus); |
2e3db52d | 1577 | assert(m); |
718db961 LP |
1578 | |
1579 | if (bus->is_kernel) | |
069f5e61 | 1580 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1581 | else |
2e3db52d LP |
1582 | r = bus_socket_write_message(bus, m, idx); |
1583 | ||
1584 | if (r <= 0) | |
1585 | return r; | |
1586 | ||
90911bb6 | 1587 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1588 | 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 |
1589 | bus_message_type_to_string(m->header->type), |
1590 | strna(sd_bus_message_get_sender(m)), | |
1591 | strna(sd_bus_message_get_destination(m)), | |
1592 | strna(sd_bus_message_get_path(m)), | |
1593 | strna(sd_bus_message_get_interface(m)), | |
1594 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1595 | BUS_MESSAGE_COOKIE(m), |
1596 | m->reply_cookie, | |
2e3db52d LP |
1597 | strna(m->error.message)); |
1598 | ||
1599 | return r; | |
718db961 LP |
1600 | } |
1601 | ||
de1c301e | 1602 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1603 | int r, ret = 0; |
de1c301e LP |
1604 | |
1605 | assert(bus); | |
89ffcd2a | 1606 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1607 | |
de1c301e LP |
1608 | while (bus->wqueue_size > 0) { |
1609 | ||
069f5e61 | 1610 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1611 | if (r < 0) |
de1c301e | 1612 | return r; |
718db961 | 1613 | else if (r == 0) |
e3017af9 LP |
1614 | /* Didn't do anything this time */ |
1615 | return ret; | |
6629161f | 1616 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1617 | /* Fully written. Let's drop the entry from |
1618 | * the queue. | |
1619 | * | |
1620 | * This isn't particularly optimized, but | |
1621 | * well, this is supposed to be our worst-case | |
1622 | * buffer only, and the socket buffer is | |
1623 | * supposed to be our primary buffer, and if | |
1624 | * it got full, then all bets are off | |
1625 | * anyway. */ | |
1626 | ||
de1c301e | 1627 | bus->wqueue_size --; |
c4e6e242 | 1628 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1629 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1630 | bus->windex = 0; | |
1631 | ||
e3017af9 | 1632 | ret = 1; |
de1c301e LP |
1633 | } |
1634 | } | |
1635 | ||
e3017af9 | 1636 | return ret; |
de1c301e LP |
1637 | } |
1638 | ||
766c5809 | 1639 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1640 | assert(bus); |
1641 | ||
1642 | if (bus->is_kernel) | |
766c5809 | 1643 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1644 | else |
1645 | return bus_socket_read_message(bus); | |
1646 | } | |
1647 | ||
7adc46fc | 1648 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1649 | assert(bus); |
7d22c717 | 1650 | |
821e0756 | 1651 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1652 | return -ENOBUFS; |
1653 | ||
821e0756 | 1654 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1655 | return -ENOMEM; |
1656 | ||
7d22c717 LP |
1657 | return 0; |
1658 | } | |
1659 | ||
766c5809 | 1660 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1661 | int r, ret = 0; |
de1c301e LP |
1662 | |
1663 | assert(bus); | |
1664 | assert(m); | |
89ffcd2a | 1665 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1666 | |
766c5809 LP |
1667 | /* Note that the priority logic is only available on kdbus, |
1668 | * where the rqueue is unused. We check the rqueue here | |
1669 | * anyway, because it's simple... */ | |
1670 | ||
7d22c717 LP |
1671 | for (;;) { |
1672 | if (bus->rqueue_size > 0) { | |
1673 | /* Dispatch a queued message */ | |
de1c301e | 1674 | |
7d22c717 LP |
1675 | *m = bus->rqueue[0]; |
1676 | bus->rqueue_size --; | |
1677 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1678 | return 1; | |
1679 | } | |
de1c301e | 1680 | |
7d22c717 | 1681 | /* Try to read a new message */ |
766c5809 | 1682 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1683 | if (r < 0) |
e3017af9 | 1684 | return r; |
e3017af9 LP |
1685 | if (r == 0) |
1686 | return ret; | |
de1c301e | 1687 | |
2e8d788c | 1688 | ret = 1; |
7d22c717 | 1689 | } |
de1c301e LP |
1690 | } |
1691 | ||
069f5e61 | 1692 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1693 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1694 | int r; |
1695 | ||
d6888822 | 1696 | assert_return(bus, -EINVAL); |
d6888822 LP |
1697 | assert_return(m, -EINVAL); |
1698 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1699 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1700 | |
a3d59cd1 LP |
1701 | if (!BUS_IS_OPEN(bus->state)) |
1702 | return -ENOTCONN; | |
1703 | ||
021a1e78 LP |
1704 | if (m->n_fds > 0) { |
1705 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1706 | if (r < 0) | |
1707 | return r; | |
1708 | if (r == 0) | |
15411c0c | 1709 | return -EOPNOTSUPP; |
021a1e78 | 1710 | } |
de1c301e | 1711 | |
693eb9a2 | 1712 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1713 | * is expected */ |
693eb9a2 | 1714 | if (!cookie && !m->sealed) |
0461f8cd | 1715 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1716 | |
3df7a7e6 | 1717 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1718 | if (r < 0) |
1719 | return r; | |
1720 | ||
441d56a1 | 1721 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1722 | * message and place a replacement in m */ |
1723 | r = bus_remarshal_message(bus, &m); | |
1724 | if (r < 0) | |
1725 | return r; | |
1726 | ||
5407f2de LP |
1727 | /* If this is a reply and no reply was requested, then let's |
1728 | * suppress this, if we can */ | |
997eadb5 LP |
1729 | if (m->dont_send) |
1730 | goto finish; | |
5407f2de | 1731 | |
89ffcd2a | 1732 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1733 | size_t idx = 0; |
1734 | ||
069f5e61 | 1735 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1736 | if (r < 0) { |
441d56a1 | 1737 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1738 | bus_enter_closing(bus); |
441d56a1 LP |
1739 | return -ECONNRESET; |
1740 | } | |
32f46480 | 1741 | |
de1c301e | 1742 | return r; |
997eadb5 LP |
1743 | } |
1744 | ||
1745 | if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { | |
de1c301e LP |
1746 | /* Wasn't fully written. So let's remember how |
1747 | * much was written. Note that the first entry | |
1748 | * of the wqueue array is always allocated so | |
1749 | * that we always can remember how much was | |
1750 | * written. */ | |
1751 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1752 | bus->wqueue_size = 1; | |
1753 | bus->windex = idx; | |
1754 | } | |
997eadb5 | 1755 | |
de1c301e | 1756 | } else { |
de1c301e LP |
1757 | /* Just append it to the queue. */ |
1758 | ||
25220239 | 1759 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1760 | return -ENOBUFS; |
1761 | ||
821e0756 | 1762 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1763 | return -ENOMEM; |
1764 | ||
821e0756 | 1765 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1766 | } |
1767 | ||
997eadb5 | 1768 | finish: |
693eb9a2 LP |
1769 | if (cookie) |
1770 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1771 | |
7a37d625 | 1772 | return 1; |
de1c301e LP |
1773 | } |
1774 | ||
069f5e61 LP |
1775 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1776 | return bus_send_internal(bus, m, cookie, false); | |
1777 | } | |
1778 | ||
693eb9a2 | 1779 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1780 | int r; |
1781 | ||
1782 | assert_return(bus, -EINVAL); | |
911121a7 LP |
1783 | assert_return(m, -EINVAL); |
1784 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1785 | ||
a3d59cd1 LP |
1786 | if (!BUS_IS_OPEN(bus->state)) |
1787 | return -ENOTCONN; | |
1788 | ||
911121a7 LP |
1789 | if (!streq_ptr(m->destination, destination)) { |
1790 | ||
1791 | if (!destination) | |
1792 | return -EEXIST; | |
1793 | ||
1794 | r = sd_bus_message_set_destination(m, destination); | |
1795 | if (r < 0) | |
1796 | return r; | |
1797 | } | |
1798 | ||
693eb9a2 | 1799 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1800 | } |
1801 | ||
de1c301e LP |
1802 | static usec_t calc_elapse(uint64_t usec) { |
1803 | if (usec == (uint64_t) -1) | |
1804 | return 0; | |
1805 | ||
de1c301e LP |
1806 | return now(CLOCK_MONOTONIC) + usec; |
1807 | } | |
1808 | ||
e3017af9 LP |
1809 | static int timeout_compare(const void *a, const void *b) { |
1810 | const struct reply_callback *x = a, *y = b; | |
1811 | ||
1812 | if (x->timeout != 0 && y->timeout == 0) | |
1813 | return -1; | |
1814 | ||
1815 | if (x->timeout == 0 && y->timeout != 0) | |
1816 | return 1; | |
1817 | ||
1818 | if (x->timeout < y->timeout) | |
1819 | return -1; | |
1820 | ||
1821 | if (x->timeout > y->timeout) | |
1822 | return 1; | |
1823 | ||
1824 | return 0; | |
1825 | } | |
1826 | ||
c49b30a2 | 1827 | _public_ int sd_bus_call_async( |
de1c301e | 1828 | sd_bus *bus, |
19befb2d | 1829 | sd_bus_slot **slot, |
e1c433c6 | 1830 | sd_bus_message *_m, |
52f3ba91 | 1831 | sd_bus_message_handler_t callback, |
de1c301e | 1832 | void *userdata, |
19befb2d | 1833 | uint64_t usec) { |
de1c301e | 1834 | |
e1c433c6 | 1835 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1836 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1837 | int r; |
1838 | ||
d6888822 | 1839 | assert_return(bus, -EINVAL); |
d6888822 | 1840 | assert_return(m, -EINVAL); |
40ca29a1 | 1841 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1842 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1843 | assert_return(callback, -EINVAL); |
1844 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1845 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1846 | |
a3d59cd1 LP |
1847 | if (!BUS_IS_OPEN(bus->state)) |
1848 | return -ENOTCONN; | |
1849 | ||
c9fe4af7 | 1850 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1851 | if (r < 0) |
1852 | return r; | |
de1c301e | 1853 | |
3df7a7e6 LP |
1854 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1855 | if (r < 0) | |
1856 | return r; | |
e3017af9 | 1857 | |
3df7a7e6 | 1858 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1859 | if (r < 0) |
1860 | return r; | |
1861 | ||
e1c433c6 LP |
1862 | r = bus_remarshal_message(bus, &m); |
1863 | if (r < 0) | |
1864 | return r; | |
1865 | ||
19befb2d LP |
1866 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1867 | if (!s) | |
de1c301e LP |
1868 | return -ENOMEM; |
1869 | ||
19befb2d | 1870 | s->reply_callback.callback = callback; |
de1c301e | 1871 | |
19befb2d | 1872 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1873 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1874 | if (r < 0) { |
19befb2d | 1875 | s->reply_callback.cookie = 0; |
de1c301e LP |
1876 | return r; |
1877 | } | |
1878 | ||
19befb2d LP |
1879 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1880 | if (s->reply_callback.timeout != 0) { | |
1881 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1882 | if (r < 0) { |
19befb2d | 1883 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1884 | return r; |
1885 | } | |
1886 | } | |
1887 | ||
19befb2d LP |
1888 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1889 | if (r < 0) | |
de1c301e | 1890 | return r; |
de1c301e | 1891 | |
19befb2d LP |
1892 | if (slot) |
1893 | *slot = s; | |
1894 | s = NULL; | |
e3017af9 | 1895 | |
19befb2d | 1896 | return r; |
de1c301e LP |
1897 | } |
1898 | ||
20902f3e | 1899 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1900 | int r; |
1901 | ||
1902 | assert(bus); | |
1903 | ||
718db961 | 1904 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1905 | return -ENOTCONN; |
d728d708 LP |
1906 | if (bus->state == BUS_RUNNING) |
1907 | return 1; | |
89ffcd2a LP |
1908 | |
1909 | for (;;) { | |
1910 | r = sd_bus_process(bus, NULL); | |
1911 | if (r < 0) | |
1912 | return r; | |
d728d708 LP |
1913 | if (bus->state == BUS_RUNNING) |
1914 | return 1; | |
e3017af9 LP |
1915 | if (r > 0) |
1916 | continue; | |
89ffcd2a LP |
1917 | |
1918 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1919 | if (r < 0) | |
1920 | return r; | |
1921 | } | |
1922 | } | |
1923 | ||
97f82db3 | 1924 | _public_ int sd_bus_call( |
de1c301e | 1925 | sd_bus *bus, |
97f82db3 | 1926 | sd_bus_message *_m, |
de1c301e LP |
1927 | uint64_t usec, |
1928 | sd_bus_error *error, | |
1929 | sd_bus_message **reply) { | |
1930 | ||
97f82db3 | 1931 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1932 | usec_t timeout; |
693eb9a2 | 1933 | uint64_t cookie; |
7d22c717 LP |
1934 | unsigned i; |
1935 | int r; | |
de1c301e | 1936 | |
97f82db3 | 1937 | assert_return(bus, -EINVAL); |
97f82db3 KS |
1938 | assert_return(m, -EINVAL); |
1939 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
1940 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1941 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1942 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1943 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
97f82db3 | 1944 | |
a3d59cd1 LP |
1945 | if (!BUS_IS_OPEN(bus->state)) |
1946 | return -ENOTCONN; | |
1947 | ||
97f82db3 KS |
1948 | r = bus_ensure_running(bus); |
1949 | if (r < 0) | |
1950 | return r; | |
1951 | ||
a43b9ca3 | 1952 | i = bus->rqueue_size; |
97f82db3 KS |
1953 | |
1954 | r = bus_seal_message(bus, m, usec); | |
1955 | if (r < 0) | |
1956 | return r; | |
1957 | ||
1958 | r = bus_remarshal_message(bus, &m); | |
1959 | if (r < 0) | |
1960 | return r; | |
1961 | ||
069f5e61 | 1962 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e LP |
1963 | if (r < 0) |
1964 | return r; | |
1965 | ||
3df7a7e6 | 1966 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1967 | |
1968 | for (;;) { | |
1969 | usec_t left; | |
de1c301e | 1970 | |
7d22c717 LP |
1971 | while (i < bus->rqueue_size) { |
1972 | sd_bus_message *incoming = NULL; | |
1973 | ||
1974 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1975 | |
693eb9a2 | 1976 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1977 | /* Found a match! */ |
1978 | ||
7d22c717 LP |
1979 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1980 | bus->rqueue_size--; | |
1981 | ||
40ca29a1 | 1982 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 1983 | |
2ce97e2b LP |
1984 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
1985 | if (reply) | |
1986 | *reply = incoming; | |
1987 | else | |
1988 | sd_bus_message_unref(incoming); | |
1989 | ||
1990 | return 1; | |
1991 | } | |
1992 | ||
1993 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
b7f247e0 | 1994 | |
a43b9ca3 | 1995 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1996 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1997 | else |
1998 | r = -EIO; | |
de1c301e LP |
1999 | |
2000 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 2001 | return r; |
a8a07f89 | 2002 | |
693eb9a2 | 2003 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2004 | bus->unique_name && |
2005 | incoming->sender && | |
2006 | streq(bus->unique_name, incoming->sender)) { | |
2007 | ||
7d22c717 LP |
2008 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2009 | bus->rqueue_size--; | |
2010 | ||
a8a07f89 LP |
2011 | /* Our own message? Somebody is trying |
2012 | * to send its own client a message, | |
2013 | * let's not dead-lock, let's fail | |
2014 | * immediately. */ | |
2015 | ||
2016 | sd_bus_message_unref(incoming); | |
2017 | return -ELOOP; | |
de1c301e LP |
2018 | } |
2019 | ||
de1c301e | 2020 | /* Try to read more, right-away */ |
7d22c717 | 2021 | i++; |
de1c301e | 2022 | } |
7d22c717 | 2023 | |
766c5809 | 2024 | r = bus_read_message(bus, false, 0); |
32f46480 | 2025 | if (r < 0) { |
441d56a1 | 2026 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2027 | bus_enter_closing(bus); |
441d56a1 LP |
2028 | return -ECONNRESET; |
2029 | } | |
32f46480 | 2030 | |
a43b9ca3 | 2031 | return r; |
32f46480 | 2032 | } |
7d22c717 | 2033 | if (r > 0) |
e3017af9 | 2034 | continue; |
de1c301e LP |
2035 | |
2036 | if (timeout > 0) { | |
2037 | usec_t n; | |
2038 | ||
2039 | n = now(CLOCK_MONOTONIC); | |
2040 | if (n >= timeout) | |
2041 | return -ETIMEDOUT; | |
2042 | ||
2043 | left = timeout - n; | |
2044 | } else | |
2045 | left = (uint64_t) -1; | |
2046 | ||
e3017af9 | 2047 | r = bus_poll(bus, true, left); |
de1c301e LP |
2048 | if (r < 0) |
2049 | return r; | |
f8e11cda LP |
2050 | if (r == 0) |
2051 | return -ETIMEDOUT; | |
de1c301e LP |
2052 | |
2053 | r = dispatch_wqueue(bus); | |
32f46480 | 2054 | if (r < 0) { |
441d56a1 | 2055 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2056 | bus_enter_closing(bus); |
441d56a1 LP |
2057 | return -ECONNRESET; |
2058 | } | |
32f46480 | 2059 | |
de1c301e | 2060 | return r; |
32f46480 | 2061 | } |
de1c301e LP |
2062 | } |
2063 | } | |
2064 | ||
d9f644e2 | 2065 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2066 | |
2067 | assert_return(bus, -EINVAL); | |
d6888822 LP |
2068 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2069 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2070 | |
e82c9509 | 2071 | return bus->input_fd; |
de1c301e LP |
2072 | } |
2073 | ||
d9f644e2 | 2074 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2075 | int flags = 0; |
2076 | ||
d6888822 | 2077 | assert_return(bus, -EINVAL); |
d6888822 | 2078 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2079 | |
a3d59cd1 LP |
2080 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2081 | return -ENOTCONN; | |
2082 | ||
de1c301e LP |
2083 | if (bus->state == BUS_OPENING) |
2084 | flags |= POLLOUT; | |
89ffcd2a LP |
2085 | else if (bus->state == BUS_AUTHENTICATING) { |
2086 | ||
2181a7f5 | 2087 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2088 | flags |= POLLOUT; |
2089 | ||
2090 | flags |= POLLIN; | |
2091 | ||
2092 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2093 | if (bus->rqueue_size <= 0) |
2094 | flags |= POLLIN; | |
2095 | if (bus->wqueue_size > 0) | |
2096 | flags |= POLLOUT; | |
2097 | } | |
2098 | ||
2099 | return flags; | |
2100 | } | |
2101 | ||
d9f644e2 | 2102 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2103 | struct reply_callback *c; |
2104 | ||
d6888822 LP |
2105 | assert_return(bus, -EINVAL); |
2106 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2107 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2108 | |
a3d59cd1 LP |
2109 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2110 | return -ENOTCONN; | |
2111 | ||
8f8f05a9 LP |
2112 | if (bus->track_queue) { |
2113 | *timeout_usec = 0; | |
2114 | return 1; | |
2115 | } | |
2116 | ||
718db961 LP |
2117 | if (bus->state == BUS_CLOSING) { |
2118 | *timeout_usec = 0; | |
2119 | return 1; | |
2120 | } | |
2121 | ||
e3017af9 LP |
2122 | if (bus->state == BUS_AUTHENTICATING) { |
2123 | *timeout_usec = bus->auth_timeout; | |
2124 | return 1; | |
2125 | } | |
2126 | ||
adee69fa LP |
2127 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2128 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2129 | return 0; |
adee69fa | 2130 | } |
e3017af9 | 2131 | |
8efd6381 LP |
2132 | if (bus->rqueue_size > 0) { |
2133 | *timeout_usec = 0; | |
2134 | return 1; | |
2135 | } | |
2136 | ||
e3017af9 | 2137 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2138 | if (!c) { |
2139 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2140 | return 0; |
adee69fa | 2141 | } |
e3017af9 | 2142 | |
19befb2d LP |
2143 | if (c->timeout == 0) { |
2144 | *timeout_usec = (uint64_t) -1; | |
2145 | return 0; | |
2146 | } | |
2147 | ||
e3017af9 LP |
2148 | *timeout_usec = c->timeout; |
2149 | return 1; | |
2150 | } | |
2151 | ||
2152 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2153 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2154 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2155 | struct reply_callback *c; |
1b64f838 | 2156 | sd_bus_slot *slot; |
e3017af9 LP |
2157 | usec_t n; |
2158 | int r; | |
2159 | ||
2160 | assert(bus); | |
2161 | ||
2162 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2163 | if (!c) | |
2164 | return 0; | |
2165 | ||
2166 | n = now(CLOCK_MONOTONIC); | |
2167 | if (c->timeout > n) | |
2168 | return 0; | |
2169 | ||
eb01ba5d LP |
2170 | r = bus_message_new_synthetic_error( |
2171 | bus, | |
693eb9a2 | 2172 | c->cookie, |
14c24659 | 2173 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2174 | &m); |
2175 | if (r < 0) | |
2176 | return r; | |
2177 | ||
7adc46fc | 2178 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2179 | if (r < 0) |
2180 | return r; | |
2181 | ||
e3017af9 | 2182 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2183 | c->timeout = 0; |
2184 | ||
c9fe4af7 | 2185 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2186 | c->cookie = 0; |
2187 | ||
1b64f838 | 2188 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2189 | |
718db961 LP |
2190 | bus->iteration_counter ++; |
2191 | ||
1b64f838 LP |
2192 | bus->current_message = m; |
2193 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2194 | bus->current_handler = c->callback; |
2195 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2196 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2197 | bus->current_userdata = NULL; |
2198 | bus->current_handler = NULL; | |
d974ad05 | 2199 | bus->current_slot = NULL; |
19befb2d | 2200 | bus->current_message = NULL; |
718db961 | 2201 | |
1b64f838 LP |
2202 | if (slot->floating) { |
2203 | bus_slot_disconnect(slot); | |
2204 | sd_bus_slot_unref(slot); | |
2205 | } | |
2206 | ||
d974ad05 DH |
2207 | sd_bus_slot_unref(slot); |
2208 | ||
1b64f838 | 2209 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2210 | } |
2211 | ||
9d373862 LP |
2212 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2213 | assert(bus); | |
2214 | assert(m); | |
2215 | ||
2216 | if (bus->state != BUS_HELLO) | |
2217 | return 0; | |
2218 | ||
2219 | /* Let's make sure the first message on the bus is the HELLO | |
2220 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2221 | * here (we leave that to the usual handling), we just verify |
2222 | * we don't let any earlier msg through. */ | |
9d373862 | 2223 | |
40ca29a1 LP |
2224 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2225 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2226 | return -EIO; |
2227 | ||
19befb2d | 2228 | if (m->reply_cookie != 1) |
9d373862 LP |
2229 | return -EIO; |
2230 | ||
2231 | return 0; | |
2232 | } | |
2233 | ||
a652755d | 2234 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2235 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2236 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2237 | struct reply_callback *c; |
1b64f838 | 2238 | sd_bus_slot *slot; |
a652755d LP |
2239 | int r; |
2240 | ||
2241 | assert(bus); | |
2242 | assert(m); | |
2243 | ||
40ca29a1 LP |
2244 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2245 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2246 | return 0; |
2247 | ||
09365592 LP |
2248 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2249 | return 0; | |
2250 | ||
2251 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2252 | return 0; | |
2253 | ||
c9fe4af7 | 2254 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2255 | if (!c) |
2256 | return 0; | |
2257 | ||
19befb2d | 2258 | c->cookie = 0; |
19befb2d | 2259 | |
1b64f838 | 2260 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2261 | |
2ce97e2b LP |
2262 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2263 | ||
2264 | /* If the reply contained a file descriptor which we | |
2265 | * didn't want we pass an error instead. */ | |
2266 | ||
2267 | r = bus_message_new_synthetic_error( | |
2268 | bus, | |
2269 | m->reply_cookie, | |
2270 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2271 | &synthetic_reply); | |
2272 | if (r < 0) | |
1b64f838 | 2273 | return r; |
2ce97e2b | 2274 | |
52cd5877 LP |
2275 | /* Copy over original timestamp */ |
2276 | synthetic_reply->realtime = m->realtime; | |
2277 | synthetic_reply->monotonic = m->monotonic; | |
2278 | synthetic_reply->seqnum = m->seqnum; | |
2279 | ||
2ce97e2b LP |
2280 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2281 | if (r < 0) | |
1b64f838 | 2282 | return r; |
2ce97e2b LP |
2283 | |
2284 | m = synthetic_reply; | |
2285 | } else { | |
2286 | r = sd_bus_message_rewind(m, true); | |
2287 | if (r < 0) | |
1b64f838 | 2288 | return r; |
2ce97e2b | 2289 | } |
88fe224c | 2290 | |
1b64f838 LP |
2291 | if (c->timeout != 0) { |
2292 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2293 | c->timeout = 0; | |
2294 | } | |
19befb2d | 2295 | |
1b64f838 | 2296 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2297 | bus->current_handler = c->callback; |
2298 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2299 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2300 | bus->current_userdata = NULL; |
2301 | bus->current_handler = NULL; | |
d974ad05 | 2302 | bus->current_slot = NULL; |
a652755d | 2303 | |
19befb2d LP |
2304 | if (slot->floating) { |
2305 | bus_slot_disconnect(slot); | |
2306 | sd_bus_slot_unref(slot); | |
2307 | } | |
2308 | ||
d974ad05 DH |
2309 | sd_bus_slot_unref(slot); |
2310 | ||
1b64f838 | 2311 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2312 | } |
2313 | ||
2314 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2315 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2316 | struct filter_callback *l; |
2317 | int r; | |
2318 | ||
392d5b37 LP |
2319 | assert(bus); |
2320 | assert(m); | |
2321 | ||
7286037f LP |
2322 | do { |
2323 | bus->filter_callbacks_modified = false; | |
2324 | ||
2325 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2326 | sd_bus_slot *slot; |
7286037f LP |
2327 | |
2328 | if (bus->filter_callbacks_modified) | |
2329 | break; | |
2330 | ||
2331 | /* Don't run this more than once per iteration */ | |
2332 | if (l->last_iteration == bus->iteration_counter) | |
2333 | continue; | |
2334 | ||
2335 | l->last_iteration = bus->iteration_counter; | |
2336 | ||
88fe224c LP |
2337 | r = sd_bus_message_rewind(m, true); |
2338 | if (r < 0) | |
2339 | return r; | |
2340 | ||
1b64f838 LP |
2341 | slot = container_of(l, sd_bus_slot, filter_callback); |
2342 | ||
2343 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2344 | bus->current_handler = l->callback; |
2345 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2346 | r = l->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2347 | bus->current_userdata = NULL; |
2348 | bus->current_handler = NULL; | |
1b64f838 | 2349 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2350 | |
ebcf1f97 | 2351 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2352 | if (r != 0) |
2353 | return r; | |
2354 | ||
2355 | } | |
2356 | ||
2357 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2358 | |
2359 | return 0; | |
2360 | } | |
2361 | ||
392d5b37 | 2362 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2363 | int r; |
2364 | ||
392d5b37 LP |
2365 | assert(bus); |
2366 | assert(m); | |
2367 | ||
7286037f LP |
2368 | do { |
2369 | bus->match_callbacks_modified = false; | |
2370 | ||
eb01ba5d | 2371 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2372 | if (r != 0) |
2373 | return r; | |
2374 | ||
2375 | } while (bus->match_callbacks_modified); | |
2376 | ||
2377 | return 0; | |
392d5b37 LP |
2378 | } |
2379 | ||
b9bf7e2b LP |
2380 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2381 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2382 | int r; | |
2383 | ||
2384 | assert(bus); | |
2385 | assert(m); | |
2386 | ||
09365592 LP |
2387 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2388 | return 0; | |
2389 | ||
758bf0c7 LP |
2390 | if (bus->manual_peer_interface) |
2391 | return 0; | |
2392 | ||
40ca29a1 | 2393 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2394 | return 0; |
2395 | ||
2396 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2397 | return 0; | |
2398 | ||
0461f8cd | 2399 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2400 | return 1; |
2401 | ||
2402 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2403 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2404 | else if (streq_ptr(m->member, "GetMachineId")) { |
2405 | sd_id128_t id; | |
2406 | char sid[33]; | |
2407 | ||
2408 | r = sd_id128_get_machine(&id); | |
2409 | if (r < 0) | |
2410 | return r; | |
2411 | ||
df2d202e | 2412 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2413 | if (r < 0) |
2414 | return r; | |
2415 | ||
2416 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2417 | } else { | |
29ddb38f | 2418 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2419 | m, &reply, |
40ca29a1 | 2420 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2421 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2422 | } |
2423 | ||
2424 | if (r < 0) | |
2425 | return r; | |
2426 | ||
2427 | r = sd_bus_send(bus, reply, NULL); | |
2428 | if (r < 0) | |
2429 | return r; | |
2430 | ||
2431 | return 1; | |
2432 | } | |
2433 | ||
2ce97e2b LP |
2434 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2435 | assert(bus); | |
2436 | assert(m); | |
2437 | ||
2438 | /* If we got a message with a file descriptor which we didn't | |
2439 | * want to accept, then let's drop it. How can this even | |
2440 | * happen? For example, when the kernel queues a message into | |
2441 | * an activatable names's queue which allows fds, and then is | |
2442 | * delivered to us later even though we ourselves did not | |
2443 | * negotiate it. */ | |
2444 | ||
09365592 LP |
2445 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2446 | return 0; | |
2447 | ||
2ce97e2b LP |
2448 | if (m->n_fds <= 0) |
2449 | return 0; | |
2450 | ||
2451 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2452 | return 0; | |
2453 | ||
2454 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2455 | return 1; /* just eat it up */ | |
2456 | ||
2457 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2458 | } | |
2459 | ||
992c052c | 2460 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2461 | int r; |
2462 | ||
2463 | assert(bus); | |
992c052c | 2464 | assert(m); |
e3017af9 | 2465 | |
19befb2d | 2466 | bus->current_message = m; |
992c052c | 2467 | bus->iteration_counter++; |
e3017af9 | 2468 | |
42c4ebcb | 2469 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", |
4cdf0751 | 2470 | bus_message_type_to_string(m->header->type), |
40ca29a1 | 2471 | strna(sd_bus_message_get_sender(m)), |
4cdf0751 | 2472 | strna(sd_bus_message_get_destination(m)), |
40ca29a1 LP |
2473 | strna(sd_bus_message_get_path(m)), |
2474 | strna(sd_bus_message_get_interface(m)), | |
4cdf0751 | 2475 | strna(sd_bus_message_get_member(m)), |
42c4ebcb LP |
2476 | BUS_MESSAGE_COOKIE(m), |
2477 | m->reply_cookie, | |
4cdf0751 | 2478 | strna(m->error.message)); |
40ca29a1 | 2479 | |
992c052c LP |
2480 | r = process_hello(bus, m); |
2481 | if (r != 0) | |
affff0b6 | 2482 | goto finish; |
a652755d | 2483 | |
992c052c LP |
2484 | r = process_reply(bus, m); |
2485 | if (r != 0) | |
affff0b6 | 2486 | goto finish; |
e3017af9 | 2487 | |
2ce97e2b LP |
2488 | r = process_fd_check(bus, m); |
2489 | if (r != 0) | |
2490 | goto finish; | |
2491 | ||
992c052c LP |
2492 | r = process_filter(bus, m); |
2493 | if (r != 0) | |
affff0b6 | 2494 | goto finish; |
a652755d | 2495 | |
992c052c LP |
2496 | r = process_match(bus, m); |
2497 | if (r != 0) | |
affff0b6 | 2498 | goto finish; |
a652755d | 2499 | |
992c052c LP |
2500 | r = process_builtin(bus, m); |
2501 | if (r != 0) | |
affff0b6 LP |
2502 | goto finish; |
2503 | ||
2504 | r = bus_process_object(bus, m); | |
a652755d | 2505 | |
affff0b6 | 2506 | finish: |
19befb2d | 2507 | bus->current_message = NULL; |
affff0b6 | 2508 | return r; |
29ddb38f | 2509 | } |
88fe224c | 2510 | |
8f8f05a9 LP |
2511 | static int dispatch_track(sd_bus *bus) { |
2512 | assert(bus); | |
2513 | ||
2514 | if (!bus->track_queue) | |
2515 | return 0; | |
2516 | ||
2517 | bus_track_dispatch(bus->track_queue); | |
2518 | return 1; | |
2519 | } | |
2520 | ||
766c5809 | 2521 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2522 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2523 | int r; |
a652755d | 2524 | |
29ddb38f | 2525 | assert(bus); |
992c052c | 2526 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2527 | |
992c052c LP |
2528 | r = process_timeout(bus); |
2529 | if (r != 0) | |
2530 | goto null_message; | |
7286037f | 2531 | |
992c052c LP |
2532 | r = dispatch_wqueue(bus); |
2533 | if (r != 0) | |
2534 | goto null_message; | |
7286037f | 2535 | |
8f8f05a9 LP |
2536 | r = dispatch_track(bus); |
2537 | if (r != 0) | |
2538 | goto null_message; | |
2539 | ||
766c5809 | 2540 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2541 | if (r < 0) |
2542 | return r; | |
2543 | if (!m) | |
2544 | goto null_message; | |
7286037f | 2545 | |
992c052c LP |
2546 | r = process_message(bus, m); |
2547 | if (r != 0) | |
2548 | goto null_message; | |
7286037f | 2549 | |
992c052c LP |
2550 | if (ret) { |
2551 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2552 | if (r < 0) |
2553 | return r; | |
e3017af9 | 2554 | |
992c052c LP |
2555 | *ret = m; |
2556 | m = NULL; | |
2557 | return 1; | |
2558 | } | |
a652755d | 2559 | |
40ca29a1 | 2560 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2561 | |
dc74ce9b LP |
2562 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2563 | strna(sd_bus_message_get_sender(m)), | |
2564 | strna(sd_bus_message_get_path(m)), | |
2565 | strna(sd_bus_message_get_interface(m)), | |
2566 | strna(sd_bus_message_get_member(m))); | |
2567 | ||
992c052c | 2568 | r = sd_bus_reply_method_errorf( |
df2d202e | 2569 | m, |
40ca29a1 | 2570 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2571 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2572 | if (r < 0) |
2573 | return r; | |
2574 | } | |
e3017af9 | 2575 | |
992c052c | 2576 | return 1; |
0a72c2bd | 2577 | |
992c052c LP |
2578 | null_message: |
2579 | if (r >= 0 && ret) | |
2580 | *ret = NULL; | |
0a72c2bd | 2581 | |
992c052c | 2582 | return r; |
29ddb38f | 2583 | } |
0a72c2bd | 2584 | |
718db961 LP |
2585 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2586 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2587 | struct reply_callback *c; | |
2588 | int r; | |
2589 | ||
2590 | assert(bus); | |
2591 | assert(bus->state == BUS_CLOSING); | |
2592 | ||
c9fe4af7 | 2593 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2594 | if (c) { |
ebcf1f97 | 2595 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2596 | sd_bus_slot *slot; |
ebcf1f97 | 2597 | |
718db961 LP |
2598 | /* First, fail all outstanding method calls */ |
2599 | r = bus_message_new_synthetic_error( | |
2600 | bus, | |
693eb9a2 | 2601 | c->cookie, |
14c24659 | 2602 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2603 | &m); |
2604 | if (r < 0) | |
2605 | return r; | |
2606 | ||
7adc46fc | 2607 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2608 | if (r < 0) |
2609 | return r; | |
2610 | ||
19befb2d | 2611 | if (c->timeout != 0) { |
718db961 | 2612 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2613 | c->timeout = 0; |
2614 | } | |
718db961 | 2615 | |
c9fe4af7 | 2616 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2617 | c->cookie = 0; |
2618 | ||
1b64f838 | 2619 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2620 | |
718db961 LP |
2621 | bus->iteration_counter++; |
2622 | ||
1b64f838 LP |
2623 | bus->current_message = m; |
2624 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2625 | bus->current_handler = c->callback; |
2626 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2627 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2628 | bus->current_userdata = NULL; |
2629 | bus->current_handler = NULL; | |
d974ad05 | 2630 | bus->current_slot = NULL; |
1b64f838 LP |
2631 | bus->current_message = NULL; |
2632 | ||
2633 | if (slot->floating) { | |
2634 | bus_slot_disconnect(slot); | |
2635 | sd_bus_slot_unref(slot); | |
2636 | } | |
718db961 | 2637 | |
d974ad05 DH |
2638 | sd_bus_slot_unref(slot); |
2639 | ||
1b64f838 | 2640 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2641 | } |
2642 | ||
2643 | /* Then, synthesize a Disconnected message */ | |
2644 | r = sd_bus_message_new_signal( | |
2645 | bus, | |
151b9b96 | 2646 | &m, |
718db961 LP |
2647 | "/org/freedesktop/DBus/Local", |
2648 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2649 | "Disconnected"); |
718db961 LP |
2650 | if (r < 0) |
2651 | return r; | |
2652 | ||
fb6d9b77 | 2653 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2654 | |
7adc46fc | 2655 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2656 | if (r < 0) |
2657 | return r; | |
2658 | ||
2659 | sd_bus_close(bus); | |
2660 | ||
19befb2d | 2661 | bus->current_message = m; |
718db961 LP |
2662 | bus->iteration_counter++; |
2663 | ||
2664 | r = process_filter(bus, m); | |
2665 | if (r != 0) | |
2666 | goto finish; | |
2667 | ||
2668 | r = process_match(bus, m); | |
2669 | if (r != 0) | |
2670 | goto finish; | |
2671 | ||
2672 | if (ret) { | |
2673 | *ret = m; | |
2674 | m = NULL; | |
2675 | } | |
2676 | ||
2677 | r = 1; | |
2678 | ||
2679 | finish: | |
19befb2d LP |
2680 | bus->current_message = NULL; |
2681 | ||
718db961 LP |
2682 | return r; |
2683 | } | |
2684 | ||
766c5809 | 2685 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2686 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2687 | int r; |
0a72c2bd | 2688 | |
992c052c LP |
2689 | /* Returns 0 when we didn't do anything. This should cause the |
2690 | * caller to invoke sd_bus_wait() before returning the next | |
2691 | * time. Returns > 0 when we did something, which possibly | |
2692 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2693 | |
d6888822 LP |
2694 | assert_return(bus, -EINVAL); |
2695 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2696 | |
992c052c | 2697 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2698 | assert_return(!bus->current_message, -EBUSY); |
2699 | assert(!bus->current_slot); | |
0a72c2bd | 2700 | |
992c052c | 2701 | switch (bus->state) { |
0a72c2bd | 2702 | |
992c052c | 2703 | case BUS_UNSET: |
992c052c | 2704 | return -ENOTCONN; |
0a72c2bd | 2705 | |
6d6f4904 LP |
2706 | case BUS_CLOSED: |
2707 | return -ECONNRESET; | |
2708 | ||
992c052c LP |
2709 | case BUS_OPENING: |
2710 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2711 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2712 | bus_enter_closing(bus); |
2713 | r = 1; | |
2714 | } else if (r < 0) | |
29ddb38f | 2715 | return r; |
992c052c LP |
2716 | if (ret) |
2717 | *ret = NULL; | |
a652755d LP |
2718 | return r; |
2719 | ||
992c052c | 2720 | case BUS_AUTHENTICATING: |
992c052c | 2721 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2722 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2723 | bus_enter_closing(bus); |
2724 | r = 1; | |
2725 | } else if (r < 0) | |
29ddb38f | 2726 | return r; |
718db961 | 2727 | |
992c052c LP |
2728 | if (ret) |
2729 | *ret = NULL; | |
718db961 | 2730 | |
992c052c | 2731 | return r; |
a652755d | 2732 | |
992c052c LP |
2733 | case BUS_RUNNING: |
2734 | case BUS_HELLO: | |
766c5809 | 2735 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2736 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2737 | bus_enter_closing(bus); |
2738 | r = 1; | |
2739 | ||
2740 | if (ret) | |
2741 | *ret = NULL; | |
2742 | } | |
43a43f50 | 2743 | |
43a43f50 | 2744 | return r; |
718db961 LP |
2745 | |
2746 | case BUS_CLOSING: | |
2747 | return process_closing(bus, ret); | |
992c052c | 2748 | } |
43a43f50 | 2749 | |
992c052c | 2750 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2751 | } |
2752 | ||
766c5809 LP |
2753 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2754 | return bus_process_internal(bus, false, 0, ret); | |
2755 | } | |
2756 | ||
2757 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2758 | return bus_process_internal(bus, true, priority, ret); | |
2759 | } | |
2760 | ||
992c052c LP |
2761 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2762 | struct pollfd p[2] = {}; | |
2763 | int r, e, n; | |
2764 | struct timespec ts; | |
3a43da28 | 2765 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2766 | |
2767 | assert(bus); | |
718db961 LP |
2768 | |
2769 | if (bus->state == BUS_CLOSING) | |
2770 | return 1; | |
2771 | ||
a3d59cd1 LP |
2772 | if (!BUS_IS_OPEN(bus->state)) |
2773 | return -ENOTCONN; | |
adcdb374 | 2774 | |
992c052c LP |
2775 | e = sd_bus_get_events(bus); |
2776 | if (e < 0) | |
2777 | return e; | |
adcdb374 | 2778 | |
992c052c | 2779 | if (need_more) |
8efd6381 LP |
2780 | /* The caller really needs some more data, he doesn't |
2781 | * care about what's already read, or any timeouts | |
ad67ef27 | 2782 | * except its own. */ |
992c052c | 2783 | e |= POLLIN; |
992c052c | 2784 | else { |
8efd6381 LP |
2785 | usec_t until; |
2786 | /* The caller wants to process if there's something to | |
2787 | * process, but doesn't care otherwise */ | |
2788 | ||
2789 | r = sd_bus_get_timeout(bus, &until); | |
2790 | if (r < 0) | |
2791 | return r; | |
2792 | if (r > 0) { | |
2793 | usec_t nw; | |
2794 | nw = now(CLOCK_MONOTONIC); | |
2795 | m = until > nw ? until - nw : 0; | |
2796 | } | |
992c052c | 2797 | } |
adcdb374 | 2798 | |
992c052c LP |
2799 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2800 | m = timeout_usec; | |
adcdb374 | 2801 | |
992c052c LP |
2802 | p[0].fd = bus->input_fd; |
2803 | if (bus->output_fd == bus->input_fd) { | |
2804 | p[0].events = e; | |
2805 | n = 1; | |
2806 | } else { | |
2807 | p[0].events = e & POLLIN; | |
2808 | p[1].fd = bus->output_fd; | |
2809 | p[1].events = e & POLLOUT; | |
2810 | n = 2; | |
adcdb374 LP |
2811 | } |
2812 | ||
992c052c | 2813 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2814 | if (r < 0) |
992c052c | 2815 | return -errno; |
adcdb374 | 2816 | |
992c052c | 2817 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2818 | } |
2819 | ||
d9f644e2 | 2820 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2821 | |
d6888822 | 2822 | assert_return(bus, -EINVAL); |
d6888822 | 2823 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2824 | |
718db961 LP |
2825 | if (bus->state == BUS_CLOSING) |
2826 | return 0; | |
2827 | ||
a3d59cd1 LP |
2828 | if (!BUS_IS_OPEN(bus->state)) |
2829 | return -ENOTCONN; | |
718db961 | 2830 | |
992c052c LP |
2831 | if (bus->rqueue_size > 0) |
2832 | return 0; | |
9db76355 | 2833 | |
992c052c LP |
2834 | return bus_poll(bus, false, timeout_usec); |
2835 | } | |
9db76355 | 2836 | |
d9f644e2 | 2837 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2838 | int r; |
9db76355 | 2839 | |
d6888822 | 2840 | assert_return(bus, -EINVAL); |
d6888822 | 2841 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2842 | |
718db961 LP |
2843 | if (bus->state == BUS_CLOSING) |
2844 | return 0; | |
2845 | ||
a3d59cd1 LP |
2846 | if (!BUS_IS_OPEN(bus->state)) |
2847 | return -ENOTCONN; | |
718db961 | 2848 | |
992c052c LP |
2849 | r = bus_ensure_running(bus); |
2850 | if (r < 0) | |
2851 | return r; | |
9db76355 | 2852 | |
992c052c LP |
2853 | if (bus->wqueue_size <= 0) |
2854 | return 0; | |
9db76355 | 2855 | |
992c052c LP |
2856 | for (;;) { |
2857 | r = dispatch_wqueue(bus); | |
32f46480 | 2858 | if (r < 0) { |
441d56a1 | 2859 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2860 | bus_enter_closing(bus); |
441d56a1 LP |
2861 | return -ECONNRESET; |
2862 | } | |
32f46480 | 2863 | |
9db76355 | 2864 | return r; |
32f46480 | 2865 | } |
9db76355 | 2866 | |
992c052c LP |
2867 | if (bus->wqueue_size <= 0) |
2868 | return 0; | |
9db76355 | 2869 | |
992c052c | 2870 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2871 | if (r < 0) |
2872 | return r; | |
9db76355 | 2873 | } |
9db76355 LP |
2874 | } |
2875 | ||
19befb2d LP |
2876 | _public_ int sd_bus_add_filter( |
2877 | sd_bus *bus, | |
2878 | sd_bus_slot **slot, | |
2879 | sd_bus_message_handler_t callback, | |
2880 | void *userdata) { | |
d9f644e2 | 2881 | |
19befb2d | 2882 | sd_bus_slot *s; |
de1c301e | 2883 | |
d6888822 LP |
2884 | assert_return(bus, -EINVAL); |
2885 | assert_return(callback, -EINVAL); | |
2886 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2887 | |
19befb2d LP |
2888 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2889 | if (!s) | |
29ddb38f LP |
2890 | return -ENOMEM; |
2891 | ||
19befb2d | 2892 | s->filter_callback.callback = callback; |
a652755d | 2893 | |
19befb2d LP |
2894 | bus->filter_callbacks_modified = true; |
2895 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2896 | |
19befb2d LP |
2897 | if (slot) |
2898 | *slot = s; | |
29ddb38f | 2899 | |
992c052c | 2900 | return 0; |
a652755d | 2901 | } |
392d5b37 | 2902 | |
19befb2d LP |
2903 | _public_ int sd_bus_add_match( |
2904 | sd_bus *bus, | |
2905 | sd_bus_slot **slot, | |
2906 | const char *match, | |
2907 | sd_bus_message_handler_t callback, | |
2908 | void *userdata) { | |
d9f644e2 | 2909 | |
992c052c LP |
2910 | struct bus_match_component *components = NULL; |
2911 | unsigned n_components = 0; | |
2915234d | 2912 | sd_bus_slot *s = NULL; |
992c052c | 2913 | int r = 0; |
392d5b37 | 2914 | |
d6888822 LP |
2915 | assert_return(bus, -EINVAL); |
2916 | assert_return(match, -EINVAL); | |
2917 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2918 | |
992c052c LP |
2919 | r = bus_match_parse(match, &components, &n_components); |
2920 | if (r < 0) | |
2921 | goto finish; | |
29ddb38f | 2922 | |
19befb2d LP |
2923 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2924 | if (!s) { | |
2925 | r = -ENOMEM; | |
2926 | goto finish; | |
2927 | } | |
2928 | ||
2929 | s->match_callback.callback = callback; | |
2930 | s->match_callback.cookie = ++bus->match_cookie; | |
2931 | ||
992c052c | 2932 | if (bus->bus_client) { |
29ddb38f | 2933 | |
19befb2d LP |
2934 | if (!bus->is_kernel) { |
2935 | /* When this is not a kernel transport, we | |
2936 | * store the original match string, so that we | |
2937 | * can use it to remove the match again */ | |
2938 | ||
2939 | s->match_callback.match_string = strdup(match); | |
2940 | if (!s->match_callback.match_string) { | |
2941 | r = -ENOMEM; | |
2942 | goto finish; | |
2943 | } | |
2944 | } | |
2945 | ||
2946 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); | |
992c052c LP |
2947 | if (r < 0) |
2948 | goto finish; | |
392d5b37 LP |
2949 | } |
2950 | ||
992c052c | 2951 | bus->match_callbacks_modified = true; |
19befb2d LP |
2952 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2953 | if (r < 0) | |
2954 | goto finish; | |
2955 | ||
2956 | if (slot) | |
2957 | *slot = s; | |
2958 | s = NULL; | |
917b5dc7 | 2959 | |
992c052c LP |
2960 | finish: |
2961 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2962 | sd_bus_slot_unref(s); |
2963 | ||
992c052c | 2964 | return r; |
917b5dc7 LP |
2965 | } |
2966 | ||
19befb2d LP |
2967 | int bus_remove_match_by_string( |
2968 | sd_bus *bus, | |
2969 | const char *match, | |
2970 | sd_bus_message_handler_t callback, | |
2971 | void *userdata) { | |
d9f644e2 | 2972 | |
992c052c LP |
2973 | struct bus_match_component *components = NULL; |
2974 | unsigned n_components = 0; | |
19befb2d LP |
2975 | struct match_callback *c; |
2976 | int r = 0; | |
917b5dc7 | 2977 | |
d6888822 LP |
2978 | assert_return(bus, -EINVAL); |
2979 | assert_return(match, -EINVAL); | |
2980 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2981 | |
992c052c | 2982 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 2983 | if (r < 0) |
19befb2d | 2984 | goto finish; |
f10dda3b | 2985 | |
19befb2d LP |
2986 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
2987 | if (r <= 0) | |
2988 | goto finish; | |
f10dda3b | 2989 | |
19befb2d | 2990 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 2991 | |
19befb2d | 2992 | finish: |
992c052c | 2993 | bus_match_parse_free(components, n_components); |
f10dda3b | 2994 | |
19befb2d | 2995 | return r; |
f10dda3b LP |
2996 | } |
2997 | ||
992c052c LP |
2998 | bool bus_pid_changed(sd_bus *bus) { |
2999 | assert(bus); | |
f10dda3b | 3000 | |
992c052c LP |
3001 | /* We don't support people creating a bus connection and |
3002 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3003 | |
992c052c | 3004 | return bus->original_pid != getpid(); |
d5a2b9a6 | 3005 | } |
40ca29a1 LP |
3006 | |
3007 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3008 | sd_bus *bus = userdata; |
40ca29a1 LP |
3009 | int r; |
3010 | ||
3011 | assert(bus); | |
3012 | ||
3013 | r = sd_bus_process(bus, NULL); | |
3014 | if (r < 0) | |
3015 | return r; | |
3016 | ||
3017 | return 1; | |
3018 | } | |
3019 | ||
3020 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3021 | sd_bus *bus = userdata; |
40ca29a1 LP |
3022 | int r; |
3023 | ||
3024 | assert(bus); | |
3025 | ||
3026 | r = sd_bus_process(bus, NULL); | |
3027 | if (r < 0) | |
3028 | return r; | |
3029 | ||
3030 | return 1; | |
3031 | } | |
3032 | ||
3033 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3034 | sd_bus *bus = userdata; | |
3035 | int r, e; | |
3036 | usec_t until; | |
3037 | ||
3038 | assert(s); | |
3039 | assert(bus); | |
3040 | ||
3041 | e = sd_bus_get_events(bus); | |
3042 | if (e < 0) | |
3043 | return e; | |
3044 | ||
3045 | if (bus->output_fd != bus->input_fd) { | |
3046 | ||
3047 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3048 | if (r < 0) | |
3049 | return r; | |
3050 | ||
3051 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
3052 | if (r < 0) | |
3053 | return r; | |
3054 | } else { | |
3055 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
3056 | if (r < 0) | |
3057 | return r; | |
3058 | } | |
3059 | ||
3060 | r = sd_bus_get_timeout(bus, &until); | |
3061 | if (r < 0) | |
3062 | return r; | |
3063 | if (r > 0) { | |
3064 | int j; | |
3065 | ||
3066 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3067 | if (j < 0) | |
3068 | return j; | |
3069 | } | |
3070 | ||
3071 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3072 | if (r < 0) | |
3073 | return r; | |
3074 | ||
3075 | return 1; | |
3076 | } | |
3077 | ||
abc5fe72 LP |
3078 | static int quit_callback(sd_event_source *event, void *userdata) { |
3079 | sd_bus *bus = userdata; | |
3080 | ||
3081 | assert(event); | |
3082 | ||
3083 | sd_bus_flush(bus); | |
7bb4d371 | 3084 | sd_bus_close(bus); |
abc5fe72 LP |
3085 | |
3086 | return 1; | |
3087 | } | |
3088 | ||
1e05d493 LP |
3089 | static int attach_io_events(sd_bus *bus) { |
3090 | int r; | |
3091 | ||
3092 | assert(bus); | |
3093 | ||
3094 | if (bus->input_fd < 0) | |
3095 | return 0; | |
3096 | ||
3097 | if (!bus->event) | |
3098 | return 0; | |
3099 | ||
3100 | if (!bus->input_io_event_source) { | |
151b9b96 | 3101 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3102 | if (r < 0) |
3103 | return r; | |
3104 | ||
3105 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3106 | if (r < 0) | |
3107 | return r; | |
3108 | ||
3109 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3110 | if (r < 0) |
3111 | return r; | |
3112 | ||
356779df | 3113 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3114 | } else |
3115 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3116 | ||
3117 | if (r < 0) | |
3118 | return r; | |
3119 | ||
3120 | if (bus->output_fd != bus->input_fd) { | |
3121 | assert(bus->output_fd >= 0); | |
3122 | ||
3123 | if (!bus->output_io_event_source) { | |
151b9b96 | 3124 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3125 | if (r < 0) |
3126 | return r; | |
3127 | ||
3128 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3129 | if (r < 0) |
3130 | return r; | |
3131 | ||
356779df | 3132 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3133 | } else |
3134 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3135 | ||
3136 | if (r < 0) | |
3137 | return r; | |
3138 | } | |
3139 | ||
3140 | return 0; | |
3141 | } | |
3142 | ||
3143 | static void detach_io_events(sd_bus *bus) { | |
3144 | assert(bus); | |
3145 | ||
3146 | if (bus->input_io_event_source) { | |
3147 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3148 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3149 | } | |
3150 | ||
3151 | if (bus->output_io_event_source) { | |
3152 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3153 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3154 | } | |
3155 | } | |
3156 | ||
d9f644e2 | 3157 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3158 | int r; |
3159 | ||
3160 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3161 | assert_return(!bus->event, -EBUSY); |
3162 | ||
3163 | assert(!bus->input_io_event_source); | |
3164 | assert(!bus->output_io_event_source); | |
3165 | assert(!bus->time_event_source); | |
3166 | ||
76b54375 LP |
3167 | if (event) |
3168 | bus->event = sd_event_ref(event); | |
3169 | else { | |
3170 | r = sd_event_default(&bus->event); | |
3171 | if (r < 0) | |
3172 | return r; | |
3173 | } | |
40ca29a1 | 3174 | |
1e05d493 | 3175 | bus->event_priority = priority; |
40ca29a1 | 3176 | |
6a0f1f6d | 3177 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3178 | if (r < 0) |
3179 | goto fail; | |
3180 | ||
3181 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3182 | if (r < 0) | |
3183 | goto fail; | |
3184 | ||
356779df | 3185 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3186 | if (r < 0) |
3187 | goto fail; | |
3188 | ||
151b9b96 | 3189 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3190 | if (r < 0) |
3191 | goto fail; | |
3192 | ||
356779df | 3193 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3194 | if (r < 0) |
3195 | goto fail; | |
3196 | ||
1e05d493 LP |
3197 | r = attach_io_events(bus); |
3198 | if (r < 0) | |
3199 | goto fail; | |
3200 | ||
40ca29a1 LP |
3201 | return 0; |
3202 | ||
3203 | fail: | |
3204 | sd_bus_detach_event(bus); | |
3205 | return r; | |
3206 | } | |
3207 | ||
d9f644e2 | 3208 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3209 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3210 | |
3211 | if (!bus->event) | |
3212 | return 0; | |
40ca29a1 | 3213 | |
1e05d493 | 3214 | detach_io_events(bus); |
40ca29a1 | 3215 | |
86befb40 LP |
3216 | if (bus->time_event_source) { |
3217 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3218 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3219 | } |
40ca29a1 | 3220 | |
86befb40 LP |
3221 | if (bus->quit_event_source) { |
3222 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3223 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3224 | } |
abc5fe72 | 3225 | |
93f1bcf4 | 3226 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3227 | return 1; |
40ca29a1 | 3228 | } |
affff0b6 | 3229 | |
2be44176 LP |
3230 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3231 | assert_return(bus, NULL); | |
3232 | ||
3233 | return bus->event; | |
3234 | } | |
3235 | ||
19befb2d LP |
3236 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3237 | assert_return(bus, NULL); | |
3238 | ||
3239 | return bus->current_message; | |
3240 | } | |
3241 | ||
3242 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3243 | assert_return(bus, NULL); |
3244 | ||
19befb2d | 3245 | return bus->current_slot; |
affff0b6 | 3246 | } |
76b54375 | 3247 | |
caa82984 LP |
3248 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3249 | assert_return(bus, NULL); | |
3250 | ||
3251 | return bus->current_handler; | |
3252 | } | |
3253 | ||
3254 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3255 | assert_return(bus, NULL); | |
3256 | ||
3257 | return bus->current_userdata; | |
3258 | } | |
3259 | ||
76b54375 LP |
3260 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3261 | sd_bus *b = NULL; | |
3262 | int r; | |
3263 | ||
3264 | assert(bus_open); | |
3265 | assert(default_bus); | |
3266 | ||
3267 | if (!ret) | |
3268 | return !!*default_bus; | |
3269 | ||
3270 | if (*default_bus) { | |
3271 | *ret = sd_bus_ref(*default_bus); | |
3272 | return 0; | |
3273 | } | |
3274 | ||
3275 | r = bus_open(&b); | |
3276 | if (r < 0) | |
3277 | return r; | |
3278 | ||
3279 | b->default_bus_ptr = default_bus; | |
3280 | b->tid = gettid(); | |
3281 | *default_bus = b; | |
3282 | ||
3283 | *ret = b; | |
3284 | return 1; | |
3285 | } | |
3286 | ||
3287 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 3288 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
3289 | |
3290 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
3291 | } | |
3292 | ||
3293 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 3294 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
3295 | |
3296 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
3297 | } | |
3298 | ||
af08d2f9 LP |
3299 | _public_ int sd_bus_default(sd_bus **ret) { |
3300 | ||
3301 | const char *e; | |
3302 | ||
3303 | /* Let's try our best to reuse another cached connection. If | |
3304 | * the starter bus type is set, connect via our normal | |
3305 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3306 | * we can share the connection with the user/system default | |
3307 | * bus. */ | |
3308 | ||
3309 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3310 | if (e) { | |
3311 | if (streq(e, "system")) | |
3312 | return sd_bus_default_system(ret); | |
09365592 | 3313 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3314 | return sd_bus_default_user(ret); |
3315 | } | |
3316 | ||
3317 | /* No type is specified, so we have not other option than to | |
3318 | * use the starter address if it is set. */ | |
3319 | ||
3320 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3321 | if (e) { | |
3322 | static thread_local sd_bus *default_starter_bus = NULL; | |
3323 | ||
3324 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3325 | } | |
3326 | ||
3327 | /* Finally, if nothing is set use the cached connection for | |
3328 | * the right scope */ | |
3329 | ||
3330 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3331 | return sd_bus_default_user(ret); | |
3332 | else | |
3333 | return sd_bus_default_system(ret); | |
3334 | } | |
3335 | ||
76b54375 LP |
3336 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3337 | assert_return(b, -EINVAL); | |
3338 | assert_return(tid, -EINVAL); | |
3339 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3340 | ||
3341 | if (b->tid != 0) { | |
3342 | *tid = b->tid; | |
3343 | return 0; | |
3344 | } | |
3345 | ||
3346 | if (b->event) | |
3347 | return sd_event_get_tid(b->event, tid); | |
3348 | ||
3349 | return -ENXIO; | |
3350 | } | |
28383ba1 | 3351 | |
a6278b88 LP |
3352 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3353 | _cleanup_free_ char *e = NULL; | |
3354 | char *ret; | |
3355 | ||
3356 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3357 | assert_return(external_id, -EINVAL); | |
3358 | assert_return(ret_path, -EINVAL); | |
3359 | ||
3360 | e = bus_label_escape(external_id); | |
3361 | if (!e) | |
3362 | return -ENOMEM; | |
3363 | ||
3364 | ret = strjoin(prefix, "/", e, NULL); | |
3365 | if (!ret) | |
3366 | return -ENOMEM; | |
3367 | ||
3368 | *ret_path = ret; | |
3369 | return 0; | |
28383ba1 LP |
3370 | } |
3371 | ||
a6278b88 LP |
3372 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3373 | const char *e; | |
3374 | char *ret; | |
3375 | ||
3376 | assert_return(object_path_is_valid(path), -EINVAL); | |
3377 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3378 | assert_return(external_id, -EINVAL); | |
3379 | ||
3380 | e = object_path_startswith(path, prefix); | |
3381 | if (!e) { | |
3382 | *external_id = NULL; | |
3383 | return 0; | |
3384 | } | |
3385 | ||
3386 | ret = bus_label_unescape(e); | |
3387 | if (!ret) | |
3388 | return -ENOMEM; | |
3389 | ||
3390 | *external_id = ret; | |
3391 | return 1; | |
28383ba1 | 3392 | } |
5b12334d | 3393 | |
ae095f86 LP |
3394 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3395 | int r; | |
3396 | ||
3397 | assert_return(bus, -EINVAL); | |
ae095f86 | 3398 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3399 | |
3400 | if (!bus->is_kernel) | |
15411c0c | 3401 | return -EOPNOTSUPP; |
a3d59cd1 LP |
3402 | |
3403 | if (!BUS_IS_OPEN(bus->state)) | |
3404 | return -ENOTCONN; | |
ae095f86 | 3405 | |
bd746b8b LP |
3406 | if (bus->rqueue_size > 0) |
3407 | return -EBUSY; | |
3408 | ||
14f862a5 LP |
3409 | if (bus->wqueue_size > 0) |
3410 | return -EBUSY; | |
3411 | ||
ae095f86 LP |
3412 | r = bus_kernel_try_close(bus); |
3413 | if (r < 0) | |
3414 | return r; | |
3415 | ||
3416 | sd_bus_close(bus); | |
3417 | return 0; | |
3418 | } | |
5972fe95 | 3419 | |
455971c1 | 3420 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3421 | assert_return(bus, -EINVAL); |
455971c1 | 3422 | assert_return(description, -EINVAL); |
f4b2933e | 3423 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3424 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3425 | ||
455971c1 | 3426 | *description = bus->description; |
5972fe95 LP |
3427 | return 0; |
3428 | } | |
fe3f22d1 DK |
3429 | |
3430 | int bus_get_root_path(sd_bus *bus) { | |
3431 | int r; | |
3432 | ||
3433 | if (bus->cgroup_root) | |
3434 | return 0; | |
3435 | ||
3436 | r = cg_get_root_path(&bus->cgroup_root); | |
3437 | if (r == -ENOENT) { | |
3438 | bus->cgroup_root = strdup("/"); | |
3439 | if (!bus->cgroup_root) | |
3440 | return -ENOMEM; | |
3441 | ||
3442 | r = 0; | |
3443 | } | |
3444 | ||
3445 | return r; | |
3446 | } | |
3acc1daf LP |
3447 | |
3448 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3449 | int r; | |
3450 | ||
3451 | assert_return(bus, -EINVAL); | |
3452 | assert_return(scope, -EINVAL); | |
3453 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3454 | ||
3455 | if (bus->is_kernel) { | |
3456 | _cleanup_free_ char *n = NULL; | |
3457 | const char *dash; | |
3458 | ||
3459 | r = bus_kernel_get_bus_name(bus, &n); | |
3460 | if (r < 0) | |
3461 | return r; | |
3462 | ||
3463 | if (streq(n, "0-system")) { | |
3464 | *scope = "system"; | |
5b820358 | 3465 | return 0; |
3acc1daf LP |
3466 | } |
3467 | ||
3468 | dash = strchr(n, '-'); | |
d2df88ff | 3469 | if (streq_ptr(dash, "-user")) { |
3acc1daf | 3470 | *scope = "user"; |
5b820358 | 3471 | return 0; |
3acc1daf LP |
3472 | } |
3473 | } | |
3474 | ||
3475 | if (bus->is_user) { | |
3476 | *scope = "user"; | |
5b820358 | 3477 | return 0; |
3acc1daf LP |
3478 | } |
3479 | ||
3480 | if (bus->is_system) { | |
3481 | *scope = "system"; | |
5b820358 LP |
3482 | return 0; |
3483 | } | |
3484 | ||
3485 | return -ENODATA; | |
3486 | } | |
3487 | ||
3488 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3489 | ||
3490 | assert_return(bus, -EINVAL); | |
3491 | assert_return(address, -EINVAL); | |
3492 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3493 | ||
3494 | if (bus->address) { | |
3495 | *address = bus->address; | |
3496 | return 0; | |
3acc1daf LP |
3497 | } |
3498 | ||
3499 | return -ENODATA; | |
3500 | } | |
224b3787 LP |
3501 | |
3502 | int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { | |
3503 | assert_return(bus, -EINVAL); | |
3504 | assert_return(mask, -EINVAL); | |
3505 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3506 | ||
3507 | *mask = bus->creds_mask; | |
3508 | return 0; | |
3509 | } | |
3510 | ||
3511 | int sd_bus_is_bus_client(sd_bus *bus) { | |
3512 | assert_return(bus, -EINVAL); | |
3513 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3514 | ||
3515 | return bus->bus_client; | |
3516 | } | |
3517 | ||
3518 | int sd_bus_is_server(sd_bus *bus) { | |
3519 | assert_return(bus, -EINVAL); | |
3520 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3521 | ||
3522 | return bus->is_server; | |
3523 | } | |
3524 | ||
3525 | int sd_bus_is_anonymous(sd_bus *bus) { | |
3526 | assert_return(bus, -EINVAL); | |
3527 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3528 | ||
3529 | return bus->anonymous_auth; | |
3530 | } | |
3531 | ||
3532 | int sd_bus_is_trusted(sd_bus *bus) { | |
3533 | assert_return(bus, -EINVAL); | |
3534 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3535 | ||
3536 | return bus->trusted; | |
3537 | } | |
3538 | ||
3539 | int sd_bus_is_monitor(sd_bus *bus) { | |
3540 | assert_return(bus, -EINVAL); | |
3541 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3542 | ||
3543 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3544 | } |