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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> | |
23 | #include <assert.h> | |
24 | #include <stdlib.h> | |
25 | #include <unistd.h> | |
26 | #include <netdb.h> | |
27 | #include <sys/poll.h> | |
28 | #include <byteswap.h> | |
63edf05e | 29 | #include <sys/mman.h> |
45fbe937 | 30 | #include <pthread.h> |
de1c301e LP |
31 | |
32 | #include "util.h" | |
33 | #include "macro.h" | |
2fd9ae2e | 34 | #include "strv.h" |
0a72c2bd | 35 | #include "set.h" |
6c03089c | 36 | #include "missing.h" |
ab9001a1 | 37 | #include "def.h" |
af08d2f9 | 38 | #include "cgroup-util.h" |
f01de965 | 39 | #include "bus-label.h" |
de1c301e LP |
40 | |
41 | #include "sd-bus.h" | |
42 | #include "bus-internal.h" | |
43 | #include "bus-message.h" | |
44 | #include "bus-type.h" | |
a7e3212d | 45 | #include "bus-socket.h" |
6629161f | 46 | #include "bus-kernel.h" |
392d5b37 | 47 | #include "bus-control.h" |
29ddb38f LP |
48 | #include "bus-introspect.h" |
49 | #include "bus-signature.h" | |
992c052c | 50 | #include "bus-objects.h" |
40ca29a1 | 51 | #include "bus-util.h" |
a7893c6b | 52 | #include "bus-container.h" |
0461f8cd | 53 | #include "bus-protocol.h" |
8f8f05a9 | 54 | #include "bus-track.h" |
19befb2d | 55 | #include "bus-slot.h" |
de1c301e | 56 | |
e3017af9 | 57 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
58 | static int attach_io_events(sd_bus *b); |
59 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 60 | |
f54514f3 LP |
61 | static void bus_close_fds(sd_bus *b) { |
62 | assert(b); | |
63 | ||
1e05d493 LP |
64 | detach_io_events(b); |
65 | ||
f54514f3 | 66 | if (b->input_fd >= 0) |
03e334a1 | 67 | safe_close(b->input_fd); |
f54514f3 LP |
68 | |
69 | if (b->output_fd >= 0 && b->output_fd != b->input_fd) | |
03e334a1 | 70 | safe_close(b->output_fd); |
f54514f3 LP |
71 | |
72 | b->input_fd = b->output_fd = -1; | |
73 | } | |
74 | ||
0e586eae | 75 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
76 | assert(b); |
77 | ||
f389bf15 LP |
78 | while (b->rqueue_size > 0) |
79 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
80 | ||
0e586eae | 81 | free(b->rqueue); |
f389bf15 LP |
82 | b->rqueue = NULL; |
83 | b->rqueue_allocated = 0; | |
0e586eae | 84 | |
f389bf15 LP |
85 | while (b->wqueue_size > 0) |
86 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 87 | |
f389bf15 LP |
88 | free(b->wqueue); |
89 | b->wqueue = NULL; | |
90 | b->wqueue_allocated = 0; | |
0e586eae LP |
91 | } |
92 | ||
de1c301e | 93 | static void bus_free(sd_bus *b) { |
19befb2d | 94 | sd_bus_slot *s; |
de1c301e LP |
95 | |
96 | assert(b); | |
8f8f05a9 LP |
97 | assert(!b->track_queue); |
98 | ||
19befb2d LP |
99 | b->state = BUS_CLOSED; |
100 | ||
40ca29a1 LP |
101 | sd_bus_detach_event(b); |
102 | ||
19befb2d LP |
103 | while ((s = b->slots)) { |
104 | /* At this point only floating slots can still be | |
105 | * around, because the non-floating ones keep a | |
106 | * reference to the bus, and we thus couldn't be | |
107 | * destructing right now... We forcibly disconnect the | |
108 | * slots here, so that they still can be referenced by | |
109 | * apps, but are dead. */ | |
110 | ||
111 | assert(s->floating); | |
112 | bus_slot_disconnect(s); | |
113 | sd_bus_slot_unref(s); | |
114 | } | |
115 | ||
f4d140e9 LP |
116 | if (b->default_bus_ptr) |
117 | *b->default_bus_ptr = NULL; | |
118 | ||
f54514f3 | 119 | bus_close_fds(b); |
de1c301e | 120 | |
63edf05e LP |
121 | if (b->kdbus_buffer) |
122 | munmap(b->kdbus_buffer, KDBUS_POOL_SIZE); | |
123 | ||
de1c301e | 124 | free(b->rbuffer); |
89ffcd2a | 125 | free(b->unique_name); |
2181a7f5 | 126 | free(b->auth_buffer); |
89ffcd2a | 127 | free(b->address); |
e9a967f9 | 128 | free(b->kernel); |
a7893c6b | 129 | free(b->machine); |
8a0e0ed9 | 130 | free(b->fake_label); |
751bc6ac | 131 | free(b->cgroup_root); |
455971c1 | 132 | free(b->description); |
89ffcd2a | 133 | |
2fd9ae2e LP |
134 | free(b->exec_path); |
135 | strv_free(b->exec_argv); | |
136 | ||
2c93b4ef LP |
137 | close_many(b->fds, b->n_fds); |
138 | free(b->fds); | |
139 | ||
0e586eae | 140 | bus_reset_queues(b); |
de1c301e | 141 | |
c9fe4af7 | 142 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 143 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 144 | |
75a0da95 | 145 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
146 | bus_match_free(&b->match_callbacks); |
147 | ||
29ddb38f LP |
148 | hashmap_free_free(b->vtable_methods); |
149 | hashmap_free_free(b->vtable_properties); | |
150 | ||
19befb2d | 151 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
152 | hashmap_free(b->nodes); |
153 | ||
bc7fd8cd LP |
154 | bus_kernel_flush_memfd(b); |
155 | ||
45fbe937 LP |
156 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
157 | ||
de1c301e LP |
158 | free(b); |
159 | } | |
160 | ||
d9f644e2 | 161 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
162 | sd_bus *r; |
163 | ||
d6888822 | 164 | assert_return(ret, -EINVAL); |
021a1e78 | 165 | |
de1c301e LP |
166 | r = new0(sd_bus, 1); |
167 | if (!r) | |
021a1e78 | 168 | return -ENOMEM; |
de1c301e | 169 | |
e4ee6e5c | 170 | r->n_ref = REFCNT_INIT; |
e82c9509 | 171 | r->input_fd = r->output_fd = -1; |
de1c301e | 172 | r->message_version = 1; |
3310dfd5 | 173 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 174 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 175 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
d5a2b9a6 | 176 | r->original_pid = getpid(); |
de1c301e | 177 | |
45fbe937 LP |
178 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
179 | ||
de1c301e LP |
180 | /* We guarantee that wqueue always has space for at least one |
181 | * entry */ | |
821e0756 | 182 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 183 | free(r); |
021a1e78 | 184 | return -ENOMEM; |
de1c301e LP |
185 | } |
186 | ||
021a1e78 LP |
187 | *ret = r; |
188 | return 0; | |
189 | } | |
190 | ||
d9f644e2 | 191 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
192 | char *a; |
193 | ||
d6888822 LP |
194 | assert_return(bus, -EINVAL); |
195 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
196 | assert_return(address, -EINVAL); | |
197 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
198 | |
199 | a = strdup(address); | |
200 | if (!a) | |
201 | return -ENOMEM; | |
202 | ||
203 | free(bus->address); | |
204 | bus->address = a; | |
205 | ||
206 | return 0; | |
207 | } | |
208 | ||
d9f644e2 | 209 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
210 | assert_return(bus, -EINVAL); |
211 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
212 | assert_return(input_fd >= 0, -EINVAL); | |
213 | assert_return(output_fd >= 0, -EINVAL); | |
214 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 215 | |
e82c9509 LP |
216 | bus->input_fd = input_fd; |
217 | bus->output_fd = output_fd; | |
021a1e78 LP |
218 | return 0; |
219 | } | |
220 | ||
d9f644e2 | 221 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
222 | char *p, **a; |
223 | ||
d6888822 LP |
224 | assert_return(bus, -EINVAL); |
225 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
226 | assert_return(path, -EINVAL); | |
227 | assert_return(!strv_isempty(argv), -EINVAL); | |
228 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
229 | |
230 | p = strdup(path); | |
231 | if (!p) | |
232 | return -ENOMEM; | |
233 | ||
234 | a = strv_copy(argv); | |
235 | if (!a) { | |
236 | free(p); | |
237 | return -ENOMEM; | |
238 | } | |
239 | ||
240 | free(bus->exec_path); | |
241 | strv_free(bus->exec_argv); | |
242 | ||
243 | bus->exec_path = p; | |
244 | bus->exec_argv = a; | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
d9f644e2 | 249 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
250 | assert_return(bus, -EINVAL); |
251 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
252 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 253 | |
94bbf1ba | 254 | bus->bus_client = !!b; |
021a1e78 LP |
255 | return 0; |
256 | } | |
257 | ||
09365592 LP |
258 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
259 | assert_return(bus, -EINVAL); | |
260 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
261 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
262 | ||
263 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
264 | return 0; | |
265 | } | |
266 | ||
d9f644e2 | 267 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
268 | assert_return(bus, -EINVAL); |
269 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
270 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 271 | |
264ad849 LP |
272 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
273 | return 0; | |
274 | } | |
275 | ||
4fc31988 | 276 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 277 | uint64_t new_flags; |
16be4368 | 278 | assert_return(bus, -EINVAL); |
b5dae4c7 | 279 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
280 | assert_return(!bus_pid_changed(bus), -ECHILD); |
281 | ||
b5dae4c7 LP |
282 | new_flags = bus->attach_flags; |
283 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
284 | ||
285 | if (bus->attach_flags == new_flags) | |
286 | return 0; | |
287 | ||
288 | bus->attach_flags = new_flags; | |
289 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
290 | bus_kernel_realize_attach_flags(bus); | |
291 | ||
16be4368 KS |
292 | return 0; |
293 | } | |
294 | ||
b5dae4c7 LP |
295 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
296 | uint64_t new_flags; | |
297 | ||
16be4368 | 298 | assert_return(bus, -EINVAL); |
95c4fe82 | 299 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 300 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
301 | assert_return(!bus_pid_changed(bus), -ECHILD); |
302 | ||
b5dae4c7 LP |
303 | if (b) |
304 | bus->creds_mask |= mask; | |
305 | else | |
306 | bus->creds_mask &= ~mask; | |
307 | ||
49b832c5 | 308 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
309 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
310 | ||
311 | /* Make sure we don't lose the timestamp flag */ | |
312 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
313 | if (bus->attach_flags == new_flags) | |
314 | return 0; | |
49b832c5 | 315 | |
b5dae4c7 LP |
316 | bus->attach_flags = new_flags; |
317 | if (bus->state != BUS_UNSET && bus->is_kernel) | |
318 | bus_kernel_realize_attach_flags(bus); | |
319 | ||
320 | return 0; | |
021a1e78 | 321 | } |
de1c301e | 322 | |
d9f644e2 | 323 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
324 | assert_return(bus, -EINVAL); |
325 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
326 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
327 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
328 | |
329 | bus->is_server = !!b; | |
98178d39 | 330 | bus->server_id = server_id; |
2181a7f5 LP |
331 | return 0; |
332 | } | |
333 | ||
d9f644e2 | 334 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
335 | assert_return(bus, -EINVAL); |
336 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
337 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
338 | |
339 | bus->anonymous_auth = !!b; | |
340 | return 0; | |
341 | } | |
342 | ||
adacb957 LP |
343 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
344 | assert_return(bus, -EINVAL); | |
345 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
346 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
347 | ||
348 | bus->trusted = !!b; | |
349 | return 0; | |
350 | } | |
351 | ||
455971c1 | 352 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 353 | assert_return(bus, -EINVAL); |
5972fe95 LP |
354 | assert_return(bus->state == BUS_UNSET, -EPERM); |
355 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
356 | ||
d1b91c99 | 357 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
358 | } |
359 | ||
ebcf1f97 | 360 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e LP |
361 | const char *s; |
362 | int r; | |
363 | ||
364 | assert(bus); | |
c99c09a2 | 365 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e LP |
366 | assert(reply); |
367 | ||
40ca29a1 | 368 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
369 | if (r > 0) |
370 | return -r; | |
eb01ba5d | 371 | |
de1c301e LP |
372 | r = sd_bus_message_read(reply, "s", &s); |
373 | if (r < 0) | |
374 | return r; | |
375 | ||
dafb7591 LP |
376 | if (!service_name_is_valid(s) || s[0] != ':') |
377 | return -EBADMSG; | |
378 | ||
de1c301e LP |
379 | bus->unique_name = strdup(s); |
380 | if (!bus->unique_name) | |
381 | return -ENOMEM; | |
382 | ||
c99c09a2 LP |
383 | if (bus->state == BUS_HELLO) |
384 | bus->state = BUS_RUNNING; | |
dafb7591 | 385 | |
de1c301e LP |
386 | return 1; |
387 | } | |
388 | ||
389 | static int bus_send_hello(sd_bus *bus) { | |
390 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
391 | int r; | |
392 | ||
393 | assert(bus); | |
394 | ||
6629161f | 395 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
396 | return 0; |
397 | ||
de1c301e LP |
398 | r = sd_bus_message_new_method_call( |
399 | bus, | |
151b9b96 | 400 | &m, |
de1c301e | 401 | "org.freedesktop.DBus", |
a7639e37 | 402 | "/org/freedesktop/DBus", |
de1c301e | 403 | "org.freedesktop.DBus", |
151b9b96 | 404 | "Hello"); |
de1c301e LP |
405 | if (r < 0) |
406 | return r; | |
407 | ||
19befb2d | 408 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
409 | } |
410 | ||
a7e3212d | 411 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
412 | assert(bus); |
413 | ||
f08838da | 414 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 415 | bus->state = BUS_HELLO; |
e3017af9 | 416 | return 1; |
de1c301e LP |
417 | } |
418 | ||
419 | bus->state = BUS_RUNNING; | |
e3017af9 | 420 | return 1; |
de1c301e LP |
421 | } |
422 | ||
423 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 424 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
425 | const char *a; |
426 | char *r = NULL; | |
427 | ||
428 | assert(p); | |
429 | assert(*p); | |
de1c301e LP |
430 | assert(value); |
431 | ||
2fd9ae2e LP |
432 | if (key) { |
433 | l = strlen(key); | |
434 | if (strncmp(*p, key, l) != 0) | |
435 | return 0; | |
de1c301e | 436 | |
2fd9ae2e LP |
437 | if ((*p)[l] != '=') |
438 | return 0; | |
de1c301e | 439 | |
2fd9ae2e LP |
440 | if (*value) |
441 | return -EINVAL; | |
de1c301e | 442 | |
2fd9ae2e LP |
443 | a = *p + l + 1; |
444 | } else | |
445 | a = *p; | |
446 | ||
447 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 448 | char c; |
de1c301e LP |
449 | |
450 | if (*a == '%') { | |
451 | int x, y; | |
452 | ||
453 | x = unhexchar(a[1]); | |
454 | if (x < 0) { | |
455 | free(r); | |
456 | return x; | |
457 | } | |
458 | ||
459 | y = unhexchar(a[2]); | |
460 | if (y < 0) { | |
461 | free(r); | |
462 | return y; | |
463 | } | |
464 | ||
de1c301e | 465 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
466 | a += 3; |
467 | } else { | |
de1c301e | 468 | c = *a; |
89ffcd2a LP |
469 | a++; |
470 | } | |
de1c301e | 471 | |
821e0756 | 472 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 473 | return -ENOMEM; |
de1c301e | 474 | |
de1c301e LP |
475 | r[n++] = c; |
476 | } | |
477 | ||
89ffcd2a LP |
478 | if (!r) { |
479 | r = strdup(""); | |
480 | if (!r) | |
481 | return -ENOMEM; | |
482 | } else | |
483 | r[n] = 0; | |
484 | ||
485 | if (*a == ',') | |
486 | a++; | |
487 | ||
de1c301e | 488 | *p = a; |
2fd9ae2e LP |
489 | |
490 | free(*value); | |
de1c301e | 491 | *value = r; |
2fd9ae2e | 492 | |
de1c301e LP |
493 | return 1; |
494 | } | |
495 | ||
496 | static void skip_address_key(const char **p) { | |
497 | assert(p); | |
498 | assert(*p); | |
499 | ||
89ffcd2a LP |
500 | *p += strcspn(*p, ","); |
501 | ||
502 | if (**p == ',') | |
503 | (*p) ++; | |
de1c301e LP |
504 | } |
505 | ||
2fd9ae2e LP |
506 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
507 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
508 | size_t l; | |
de1c301e LP |
509 | int r; |
510 | ||
511 | assert(b); | |
2fd9ae2e LP |
512 | assert(p); |
513 | assert(*p); | |
514 | assert(guid); | |
de1c301e | 515 | |
2fd9ae2e LP |
516 | while (**p != 0 && **p != ';') { |
517 | r = parse_address_key(p, "guid", guid); | |
518 | if (r < 0) | |
519 | return r; | |
520 | else if (r > 0) | |
521 | continue; | |
de1c301e | 522 | |
2fd9ae2e LP |
523 | r = parse_address_key(p, "path", &path); |
524 | if (r < 0) | |
525 | return r; | |
526 | else if (r > 0) | |
527 | continue; | |
de1c301e | 528 | |
2fd9ae2e LP |
529 | r = parse_address_key(p, "abstract", &abstract); |
530 | if (r < 0) | |
531 | return r; | |
532 | else if (r > 0) | |
533 | continue; | |
de1c301e | 534 | |
2fd9ae2e LP |
535 | skip_address_key(p); |
536 | } | |
de1c301e | 537 | |
2fd9ae2e LP |
538 | if (!path && !abstract) |
539 | return -EINVAL; | |
de1c301e | 540 | |
2fd9ae2e LP |
541 | if (path && abstract) |
542 | return -EINVAL; | |
543 | ||
544 | if (path) { | |
545 | l = strlen(path); | |
546 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
547 | return -E2BIG; | |
de1c301e | 548 | |
2fd9ae2e LP |
549 | b->sockaddr.un.sun_family = AF_UNIX; |
550 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
551 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
552 | } else if (abstract) { | |
553 | l = strlen(abstract); | |
554 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
555 | return -E2BIG; | |
556 | ||
557 | b->sockaddr.un.sun_family = AF_UNIX; | |
558 | b->sockaddr.un.sun_path[0] = 0; | |
559 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
560 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
561 | } | |
562 | ||
563 | return 0; | |
564 | } | |
565 | ||
566 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
567 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 568 | int r; |
b92bea5d ZJS |
569 | struct addrinfo *result, hints = { |
570 | .ai_socktype = SOCK_STREAM, | |
571 | .ai_flags = AI_ADDRCONFIG, | |
572 | }; | |
2fd9ae2e LP |
573 | |
574 | assert(b); | |
575 | assert(p); | |
576 | assert(*p); | |
577 | assert(guid); | |
578 | ||
579 | while (**p != 0 && **p != ';') { | |
580 | r = parse_address_key(p, "guid", guid); | |
581 | if (r < 0) | |
582 | return r; | |
583 | else if (r > 0) | |
584 | continue; | |
585 | ||
586 | r = parse_address_key(p, "host", &host); | |
587 | if (r < 0) | |
588 | return r; | |
589 | else if (r > 0) | |
590 | continue; | |
591 | ||
592 | r = parse_address_key(p, "port", &port); | |
593 | if (r < 0) | |
594 | return r; | |
595 | else if (r > 0) | |
596 | continue; | |
597 | ||
598 | r = parse_address_key(p, "family", &family); | |
599 | if (r < 0) | |
600 | return r; | |
601 | else if (r > 0) | |
602 | continue; | |
603 | ||
604 | skip_address_key(p); | |
605 | } | |
606 | ||
607 | if (!host || !port) | |
608 | return -EINVAL; | |
609 | ||
2fd9ae2e LP |
610 | if (family) { |
611 | if (streq(family, "ipv4")) | |
612 | hints.ai_family = AF_INET; | |
613 | else if (streq(family, "ipv6")) | |
614 | hints.ai_family = AF_INET6; | |
615 | else | |
616 | return -EINVAL; | |
617 | } | |
618 | ||
619 | r = getaddrinfo(host, port, &hints, &result); | |
620 | if (r == EAI_SYSTEM) | |
621 | return -errno; | |
622 | else if (r != 0) | |
623 | return -EADDRNOTAVAIL; | |
624 | ||
625 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
626 | b->sockaddr_size = result->ai_addrlen; | |
627 | ||
628 | freeaddrinfo(result); | |
629 | ||
630 | return 0; | |
631 | } | |
632 | ||
633 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
634 | char *path = NULL; | |
635 | unsigned n_argv = 0, j; | |
636 | char **argv = NULL; | |
821e0756 | 637 | size_t allocated = 0; |
2fd9ae2e LP |
638 | int r; |
639 | ||
640 | assert(b); | |
641 | assert(p); | |
642 | assert(*p); | |
643 | assert(guid); | |
644 | ||
645 | while (**p != 0 && **p != ';') { | |
646 | r = parse_address_key(p, "guid", guid); | |
647 | if (r < 0) | |
648 | goto fail; | |
649 | else if (r > 0) | |
650 | continue; | |
651 | ||
652 | r = parse_address_key(p, "path", &path); | |
653 | if (r < 0) | |
654 | goto fail; | |
655 | else if (r > 0) | |
656 | continue; | |
657 | ||
658 | if (startswith(*p, "argv")) { | |
659 | unsigned ul; | |
660 | ||
661 | errno = 0; | |
662 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 663 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
664 | r = -EINVAL; |
665 | goto fail; | |
666 | } | |
667 | ||
668 | (*p) ++; | |
669 | ||
670 | if (ul >= n_argv) { | |
821e0756 | 671 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
672 | r = -ENOMEM; |
673 | goto fail; | |
674 | } | |
675 | ||
2fd9ae2e LP |
676 | n_argv = ul + 1; |
677 | } | |
678 | ||
679 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 680 | if (r < 0) |
2fd9ae2e | 681 | goto fail; |
de1c301e | 682 | |
2fd9ae2e | 683 | continue; |
de1c301e LP |
684 | } |
685 | ||
2fd9ae2e LP |
686 | skip_address_key(p); |
687 | } | |
de1c301e | 688 | |
5a0f6033 LP |
689 | if (!path) { |
690 | r = -EINVAL; | |
2fd9ae2e | 691 | goto fail; |
5a0f6033 | 692 | } |
de1c301e | 693 | |
2fd9ae2e LP |
694 | /* Make sure there are no holes in the array, with the |
695 | * exception of argv[0] */ | |
696 | for (j = 1; j < n_argv; j++) | |
697 | if (!argv[j]) { | |
698 | r = -EINVAL; | |
699 | goto fail; | |
700 | } | |
701 | ||
702 | if (argv && argv[0] == NULL) { | |
703 | argv[0] = strdup(path); | |
704 | if (!argv[0]) { | |
705 | r = -ENOMEM; | |
706 | goto fail; | |
707 | } | |
708 | } | |
de1c301e | 709 | |
2fd9ae2e LP |
710 | b->exec_path = path; |
711 | b->exec_argv = argv; | |
712 | return 0; | |
de1c301e | 713 | |
2fd9ae2e LP |
714 | fail: |
715 | for (j = 0; j < n_argv; j++) | |
716 | free(argv[j]); | |
717 | ||
718 | free(argv); | |
719 | free(path); | |
720 | return r; | |
721 | } | |
722 | ||
6629161f LP |
723 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
724 | _cleanup_free_ char *path = NULL; | |
725 | int r; | |
726 | ||
727 | assert(b); | |
728 | assert(p); | |
729 | assert(*p); | |
730 | assert(guid); | |
731 | ||
732 | while (**p != 0 && **p != ';') { | |
733 | r = parse_address_key(p, "guid", guid); | |
734 | if (r < 0) | |
735 | return r; | |
736 | else if (r > 0) | |
737 | continue; | |
738 | ||
739 | r = parse_address_key(p, "path", &path); | |
740 | if (r < 0) | |
741 | return r; | |
742 | else if (r > 0) | |
743 | continue; | |
744 | ||
745 | skip_address_key(p); | |
746 | } | |
747 | ||
748 | if (!path) | |
749 | return -EINVAL; | |
750 | ||
751 | free(b->kernel); | |
752 | b->kernel = path; | |
753 | path = NULL; | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
bc9fd78c | 758 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
a7893c6b LP |
759 | _cleanup_free_ char *machine = NULL; |
760 | int r; | |
761 | ||
762 | assert(b); | |
763 | assert(p); | |
764 | assert(*p); | |
765 | assert(guid); | |
766 | ||
767 | while (**p != 0 && **p != ';') { | |
768 | r = parse_address_key(p, "guid", guid); | |
769 | if (r < 0) | |
770 | return r; | |
771 | else if (r > 0) | |
772 | continue; | |
773 | ||
774 | r = parse_address_key(p, "machine", &machine); | |
775 | if (r < 0) | |
776 | return r; | |
777 | else if (r > 0) | |
778 | continue; | |
779 | ||
780 | skip_address_key(p); | |
781 | } | |
782 | ||
783 | if (!machine) | |
784 | return -EINVAL; | |
785 | ||
affcf189 | 786 | if (!machine_name_is_valid(machine)) |
b6741478 LP |
787 | return -EINVAL; |
788 | ||
a7893c6b LP |
789 | free(b->machine); |
790 | b->machine = machine; | |
791 | machine = NULL; | |
792 | ||
793 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
794 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
795 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
796 | |
797 | return 0; | |
798 | } | |
799 | ||
bc9fd78c LP |
800 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
801 | _cleanup_free_ char *machine = NULL; | |
802 | int r; | |
803 | ||
804 | assert(b); | |
805 | assert(p); | |
806 | assert(*p); | |
807 | assert(guid); | |
808 | ||
809 | while (**p != 0 && **p != ';') { | |
810 | r = parse_address_key(p, "guid", guid); | |
811 | if (r < 0) | |
812 | return r; | |
813 | else if (r > 0) | |
814 | continue; | |
815 | ||
816 | r = parse_address_key(p, "machine", &machine); | |
817 | if (r < 0) | |
818 | return r; | |
819 | else if (r > 0) | |
820 | continue; | |
821 | ||
822 | skip_address_key(p); | |
823 | } | |
824 | ||
825 | if (!machine) | |
826 | return -EINVAL; | |
827 | ||
affcf189 | 828 | if (!machine_name_is_valid(machine)) |
bc9fd78c LP |
829 | return -EINVAL; |
830 | ||
831 | free(b->machine); | |
832 | b->machine = machine; | |
833 | machine = NULL; | |
834 | ||
835 | free(b->kernel); | |
63cc4c31 | 836 | b->kernel = strdup("/sys/fs/kdbus/0-system/bus"); |
bc9fd78c LP |
837 | if (!b->kernel) |
838 | return -ENOMEM; | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
2fd9ae2e LP |
843 | static void bus_reset_parsed_address(sd_bus *b) { |
844 | assert(b); | |
845 | ||
846 | zero(b->sockaddr); | |
847 | b->sockaddr_size = 0; | |
848 | strv_free(b->exec_argv); | |
849 | free(b->exec_path); | |
850 | b->exec_path = NULL; | |
851 | b->exec_argv = NULL; | |
98178d39 | 852 | b->server_id = SD_ID128_NULL; |
6629161f LP |
853 | free(b->kernel); |
854 | b->kernel = NULL; | |
a7893c6b LP |
855 | free(b->machine); |
856 | b->machine = NULL; | |
2fd9ae2e LP |
857 | } |
858 | ||
859 | static int bus_parse_next_address(sd_bus *b) { | |
860 | _cleanup_free_ char *guid = NULL; | |
861 | const char *a; | |
862 | int r; | |
863 | ||
864 | assert(b); | |
865 | ||
866 | if (!b->address) | |
867 | return 0; | |
868 | if (b->address[b->address_index] == 0) | |
869 | return 0; | |
870 | ||
871 | bus_reset_parsed_address(b); | |
872 | ||
873 | a = b->address + b->address_index; | |
de1c301e | 874 | |
2fd9ae2e | 875 | while (*a != 0) { |
de1c301e | 876 | |
2fd9ae2e LP |
877 | if (*a == ';') { |
878 | a++; | |
879 | continue; | |
de1c301e LP |
880 | } |
881 | ||
2fd9ae2e LP |
882 | if (startswith(a, "unix:")) { |
883 | a += 5; | |
de1c301e | 884 | |
2fd9ae2e | 885 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
886 | if (r < 0) |
887 | return r; | |
2fd9ae2e | 888 | break; |
de1c301e | 889 | |
2fd9ae2e | 890 | } else if (startswith(a, "tcp:")) { |
de1c301e | 891 | |
2fd9ae2e LP |
892 | a += 4; |
893 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
894 | if (r < 0) |
895 | return r; | |
de1c301e | 896 | |
2fd9ae2e LP |
897 | break; |
898 | ||
899 | } else if (startswith(a, "unixexec:")) { | |
900 | ||
901 | a += 9; | |
902 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
903 | if (r < 0) |
904 | return r; | |
de1c301e | 905 | |
2fd9ae2e | 906 | break; |
de1c301e | 907 | |
6629161f LP |
908 | } else if (startswith(a, "kernel:")) { |
909 | ||
910 | a += 7; | |
911 | r = parse_kernel_address(b, &a, &guid); | |
912 | if (r < 0) | |
913 | return r; | |
914 | ||
a7893c6b | 915 | break; |
bc9fd78c LP |
916 | } else if (startswith(a, "x-container-unix:")) { |
917 | ||
918 | a += 17; | |
919 | r = parse_container_unix_address(b, &a, &guid); | |
920 | if (r < 0) | |
921 | return r; | |
922 | ||
923 | break; | |
924 | } else if (startswith(a, "x-container-kernel:")) { | |
a7893c6b | 925 | |
bc9fd78c LP |
926 | a += 19; |
927 | r = parse_container_kernel_address(b, &a, &guid); | |
a7893c6b LP |
928 | if (r < 0) |
929 | return r; | |
930 | ||
6629161f | 931 | break; |
de1c301e LP |
932 | } |
933 | ||
2fd9ae2e LP |
934 | a = strchr(a, ';'); |
935 | if (!a) | |
936 | return 0; | |
de1c301e LP |
937 | } |
938 | ||
939 | if (guid) { | |
98178d39 | 940 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
941 | if (r < 0) |
942 | return r; | |
943 | } | |
944 | ||
2fd9ae2e | 945 | b->address_index = a - b->address; |
de1c301e LP |
946 | return 1; |
947 | } | |
948 | ||
a7e3212d | 949 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
950 | int r; |
951 | ||
952 | assert(b); | |
953 | ||
954 | for (;;) { | |
1e05d493 | 955 | bool skipped = false; |
2fd9ae2e | 956 | |
1e05d493 | 957 | bus_close_fds(b); |
a7e3212d | 958 | |
1e05d493 | 959 | if (b->exec_path) |
a7893c6b | 960 | r = bus_socket_exec(b); |
bc9fd78c LP |
961 | else if (b->machine && b->kernel) |
962 | r = bus_container_connect_kernel(b); | |
963 | else if (b->machine && b->sockaddr.sa.sa_family != AF_UNSPEC) | |
964 | r = bus_container_connect_socket(b); | |
1e05d493 | 965 | else if (b->kernel) |
a7893c6b | 966 | r = bus_kernel_connect(b); |
1e05d493 | 967 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 968 | r = bus_socket_connect(b); |
1e05d493 LP |
969 | else |
970 | skipped = true; | |
971 | ||
972 | if (!skipped) { | |
973 | if (r >= 0) { | |
974 | r = attach_io_events(b); | |
975 | if (r >= 0) | |
976 | return r; | |
977 | } | |
6629161f | 978 | |
2fd9ae2e LP |
979 | b->last_connect_error = -r; |
980 | } | |
981 | ||
982 | r = bus_parse_next_address(b); | |
983 | if (r < 0) | |
984 | return r; | |
985 | if (r == 0) | |
986 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
987 | } |
988 | } | |
989 | ||
a7e3212d LP |
990 | int bus_next_address(sd_bus *b) { |
991 | assert(b); | |
992 | ||
993 | bus_reset_parsed_address(b); | |
994 | return bus_start_address(b); | |
995 | } | |
996 | ||
021a1e78 | 997 | static int bus_start_fd(sd_bus *b) { |
6629161f | 998 | struct stat st; |
021a1e78 LP |
999 | int r; |
1000 | ||
1001 | assert(b); | |
e82c9509 LP |
1002 | assert(b->input_fd >= 0); |
1003 | assert(b->output_fd >= 0); | |
021a1e78 | 1004 | |
e82c9509 | 1005 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1006 | if (r < 0) |
1007 | return r; | |
1008 | ||
e82c9509 | 1009 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1010 | if (r < 0) |
1011 | return r; | |
1012 | ||
e82c9509 LP |
1013 | if (b->input_fd != b->output_fd) { |
1014 | r = fd_nonblock(b->output_fd, true); | |
1015 | if (r < 0) | |
1016 | return r; | |
1017 | ||
1018 | r = fd_cloexec(b->output_fd, true); | |
1019 | if (r < 0) | |
1020 | return r; | |
1021 | } | |
1022 | ||
6629161f LP |
1023 | if (fstat(b->input_fd, &st) < 0) |
1024 | return -errno; | |
1025 | ||
1026 | if (S_ISCHR(b->input_fd)) | |
1027 | return bus_kernel_take_fd(b); | |
1028 | else | |
1029 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1030 | } |
1031 | ||
d9f644e2 | 1032 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1033 | int r; |
1034 | ||
d6888822 LP |
1035 | assert_return(bus, -EINVAL); |
1036 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1037 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1038 | |
1039 | bus->state = BUS_OPENING; | |
1040 | ||
2181a7f5 LP |
1041 | if (bus->is_server && bus->bus_client) |
1042 | return -EINVAL; | |
1043 | ||
e82c9509 | 1044 | if (bus->input_fd >= 0) |
021a1e78 | 1045 | r = bus_start_fd(bus); |
a7893c6b | 1046 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1047 | r = bus_start_address(bus); |
021a1e78 LP |
1048 | else |
1049 | return -EINVAL; | |
1050 | ||
db9bb83f LP |
1051 | if (r < 0) { |
1052 | sd_bus_close(bus); | |
021a1e78 | 1053 | return r; |
db9bb83f | 1054 | } |
021a1e78 LP |
1055 | |
1056 | return bus_send_hello(bus); | |
1057 | } | |
1058 | ||
af08d2f9 LP |
1059 | _public_ int sd_bus_open(sd_bus **ret) { |
1060 | const char *e; | |
1061 | sd_bus *b; | |
1062 | int r; | |
1063 | ||
1064 | assert_return(ret, -EINVAL); | |
1065 | ||
1066 | /* Let's connect to the starter bus if it is set, and | |
1067 | * otherwise to the bus that is appropropriate for the scope | |
1068 | * we are running in */ | |
1069 | ||
1070 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1071 | if (e) { | |
1072 | if (streq(e, "system")) | |
1073 | return sd_bus_open_system(ret); | |
09365592 | 1074 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1075 | return sd_bus_open_user(ret); |
1076 | } | |
1077 | ||
1078 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1079 | if (!e) { | |
1080 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1081 | return sd_bus_open_user(ret); | |
1082 | else | |
1083 | return sd_bus_open_system(ret); | |
1084 | } | |
1085 | ||
1086 | r = sd_bus_new(&b); | |
1087 | if (r < 0) | |
1088 | return r; | |
1089 | ||
1090 | r = sd_bus_set_address(b, e); | |
1091 | if (r < 0) | |
1092 | goto fail; | |
1093 | ||
1094 | b->bus_client = true; | |
1095 | ||
1096 | /* We don't know whether the bus is trusted or not, so better | |
1097 | * be safe, and authenticate everything */ | |
1098 | b->trusted = false; | |
705a415f | 1099 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS | KDBUS_ATTACH_PIDS; |
af08d2f9 LP |
1100 | |
1101 | r = sd_bus_start(b); | |
1102 | if (r < 0) | |
1103 | goto fail; | |
1104 | ||
1105 | *ret = b; | |
1106 | return 0; | |
1107 | ||
1108 | fail: | |
1109 | bus_free(b); | |
1110 | return r; | |
1111 | } | |
1112 | ||
09365592 | 1113 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1114 | const char *e; |
09365592 LP |
1115 | assert(b); |
1116 | ||
1117 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1118 | if (e) | |
1119 | return sd_bus_set_address(b, e); | |
1120 | ||
1121 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_PATH); | |
1122 | } | |
1123 | ||
1124 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1125 | sd_bus *b; |
1126 | int r; | |
1127 | ||
d6888822 | 1128 | assert_return(ret, -EINVAL); |
de1c301e | 1129 | |
021a1e78 LP |
1130 | r = sd_bus_new(&b); |
1131 | if (r < 0) | |
1132 | return r; | |
1133 | ||
09365592 | 1134 | r = bus_set_address_system(b); |
e3dd987c LP |
1135 | if (r < 0) |
1136 | goto fail; | |
de1c301e | 1137 | |
94bbf1ba | 1138 | b->bus_client = true; |
5972fe95 | 1139 | b->is_system = true; |
021a1e78 | 1140 | |
adacb957 LP |
1141 | /* Let's do per-method access control on the system bus. We |
1142 | * need the caller's UID and capability set for that. */ | |
1143 | b->trusted = false; | |
1144 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1145 | ||
021a1e78 LP |
1146 | r = sd_bus_start(b); |
1147 | if (r < 0) | |
1148 | goto fail; | |
de1c301e LP |
1149 | |
1150 | *ret = b; | |
1151 | return 0; | |
021a1e78 LP |
1152 | |
1153 | fail: | |
1154 | bus_free(b); | |
1155 | return r; | |
de1c301e LP |
1156 | } |
1157 | ||
09365592 | 1158 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1159 | const char *e; |
de1c301e | 1160 | |
09365592 | 1161 | assert(b); |
021a1e78 | 1162 | |
6c03089c | 1163 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1164 | if (e) |
1165 | return sd_bus_set_address(b, e); | |
1166 | ||
1167 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
de1c301e | 1168 | if (e) { |
09365592 | 1169 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1170 | |
09365592 LP |
1171 | ee = bus_address_escape(e); |
1172 | if (!ee) | |
1173 | return -ENOMEM; | |
e3dd987c | 1174 | |
626851be | 1175 | #ifdef ENABLE_KDBUS |
24f6fc22 | 1176 | (void) asprintf(&b->address, KERNEL_USER_BUS_FMT ";" UNIX_USER_BUS_FMT, getuid(), ee); |
626851be | 1177 | #else |
24f6fc22 | 1178 | (void) asprintf(&b->address, UNIX_USER_BUS_FMT, ee); |
626851be | 1179 | #endif |
09365592 | 1180 | } else { |
626851be | 1181 | #ifdef ENABLE_KDBUS |
24f6fc22 | 1182 | (void) asprintf(&b->address, KERNEL_USER_BUS_FMT, getuid()); |
626851be | 1183 | #else |
09365592 | 1184 | return -ECONNREFUSED; |
626851be | 1185 | #endif |
de1c301e LP |
1186 | } |
1187 | ||
09365592 LP |
1188 | if (!b->address) |
1189 | return -ENOMEM; | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1195 | sd_bus *b; | |
1196 | int r; | |
1197 | ||
1198 | assert_return(ret, -EINVAL); | |
1199 | ||
1200 | r = sd_bus_new(&b); | |
1201 | if (r < 0) | |
1202 | return r; | |
1203 | ||
1204 | r = bus_set_address_user(b); | |
1205 | if (r < 0) | |
1206 | return r; | |
1207 | ||
94bbf1ba | 1208 | b->bus_client = true; |
5972fe95 | 1209 | b->is_user = true; |
de1c301e | 1210 | |
adacb957 LP |
1211 | /* We don't do any per-method access control on the user |
1212 | * bus. */ | |
1213 | b->trusted = true; | |
1214 | ||
021a1e78 | 1215 | r = sd_bus_start(b); |
2571ead1 LP |
1216 | if (r < 0) |
1217 | goto fail; | |
de1c301e LP |
1218 | |
1219 | *ret = b; | |
1220 | return 0; | |
2571ead1 LP |
1221 | |
1222 | fail: | |
021a1e78 | 1223 | bus_free(b); |
2571ead1 | 1224 | return r; |
de1c301e LP |
1225 | } |
1226 | ||
09365592 | 1227 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1228 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1229 | char *m = NULL, *c = NULL; |
0f8bd8de | 1230 | |
09365592 LP |
1231 | assert(b); |
1232 | assert(host); | |
0f8bd8de | 1233 | |
7f0d207d LP |
1234 | /* Let's see if we shall enter some container */ |
1235 | m = strchr(host, ':'); | |
1236 | if (m) { | |
1237 | m++; | |
1238 | ||
1239 | /* Let's make sure this is not a port of some kind, | |
1240 | * and is a valid machine name. */ | |
1241 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1242 | char *t; | |
1243 | ||
1244 | /* Cut out the host part */ | |
1245 | t = strndupa(host, m - host - 1); | |
1246 | e = bus_address_escape(t); | |
1247 | if (!e) | |
1248 | return -ENOMEM; | |
1249 | ||
1250 | c = strappenda(",argv4=--machine=", m); | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | if (!e) { | |
1255 | e = bus_address_escape(host); | |
1256 | if (!e) | |
1257 | return -ENOMEM; | |
1258 | } | |
0f8bd8de | 1259 | |
7f0d207d | 1260 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1261 | if (!b->address) |
0f8bd8de | 1262 | return -ENOMEM; |
a7893c6b | 1263 | |
09365592 LP |
1264 | return 0; |
1265 | } | |
1266 | ||
1267 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1268 | sd_bus *bus; | |
1269 | int r; | |
1270 | ||
1271 | assert_return(host, -EINVAL); | |
1272 | assert_return(ret, -EINVAL); | |
1273 | ||
a7893c6b | 1274 | r = sd_bus_new(&bus); |
09365592 | 1275 | if (r < 0) |
a7893c6b | 1276 | return r; |
a7893c6b | 1277 | |
09365592 LP |
1278 | r = bus_set_address_system_remote(bus, host); |
1279 | if (r < 0) | |
1280 | goto fail; | |
1281 | ||
a7893c6b | 1282 | bus->bus_client = true; |
09365592 | 1283 | bus->trusted = false; |
a7893c6b LP |
1284 | |
1285 | r = sd_bus_start(bus); | |
09365592 LP |
1286 | if (r < 0) |
1287 | goto fail; | |
a7893c6b LP |
1288 | |
1289 | *ret = bus; | |
1290 | return 0; | |
09365592 LP |
1291 | |
1292 | fail: | |
1293 | bus_free(bus); | |
1294 | return r; | |
a7893c6b LP |
1295 | } |
1296 | ||
09365592 | 1297 | int bus_set_address_system_container(sd_bus *b, const char *machine) { |
a7893c6b | 1298 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1299 | |
09365592 LP |
1300 | assert(b); |
1301 | assert(machine); | |
a7893c6b LP |
1302 | |
1303 | e = bus_address_escape(machine); | |
1304 | if (!e) | |
1305 | return -ENOMEM; | |
1306 | ||
9e554864 | 1307 | #ifdef ENABLE_KDBUS |
09365592 | 1308 | b->address = strjoin("x-container-kernel:machine=", e, ";x-container-unix:machine=", e, NULL); |
9e554864 | 1309 | #else |
09365592 | 1310 | b->address = strjoin("x-container-unix:machine=", e, NULL); |
9e554864 | 1311 | #endif |
09365592 | 1312 | if (!b->address) |
a7893c6b | 1313 | return -ENOMEM; |
0f8bd8de | 1314 | |
09365592 LP |
1315 | return 0; |
1316 | } | |
1317 | ||
1318 | _public_ int sd_bus_open_system_container(sd_bus **ret, const char *machine) { | |
1319 | sd_bus *bus; | |
1320 | int r; | |
1321 | ||
1322 | assert_return(machine, -EINVAL); | |
1323 | assert_return(ret, -EINVAL); | |
affcf189 | 1324 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1325 | |
0f8bd8de | 1326 | r = sd_bus_new(&bus); |
09365592 | 1327 | if (r < 0) |
0f8bd8de | 1328 | return r; |
0f8bd8de | 1329 | |
09365592 LP |
1330 | r = bus_set_address_system_container(bus, machine); |
1331 | if (r < 0) | |
1332 | goto fail; | |
1333 | ||
0f8bd8de | 1334 | bus->bus_client = true; |
09365592 | 1335 | bus->trusted = false; |
0f8bd8de LP |
1336 | |
1337 | r = sd_bus_start(bus); | |
09365592 LP |
1338 | if (r < 0) |
1339 | goto fail; | |
0f8bd8de LP |
1340 | |
1341 | *ret = bus; | |
1342 | return 0; | |
09365592 LP |
1343 | |
1344 | fail: | |
1345 | bus_free(bus); | |
1346 | return r; | |
0f8bd8de LP |
1347 | } |
1348 | ||
d9f644e2 | 1349 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1350 | |
de1c301e LP |
1351 | if (!bus) |
1352 | return; | |
d5a2b9a6 LP |
1353 | if (bus->state == BUS_CLOSED) |
1354 | return; | |
1355 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1356 | return; |
1357 | ||
1358 | bus->state = BUS_CLOSED; | |
e82c9509 | 1359 | |
40ca29a1 LP |
1360 | sd_bus_detach_event(bus); |
1361 | ||
0e586eae LP |
1362 | /* Drop all queued messages so that they drop references to |
1363 | * the bus object and the bus may be freed */ | |
1364 | bus_reset_queues(bus); | |
1365 | ||
f54514f3 LP |
1366 | if (!bus->is_kernel) |
1367 | bus_close_fds(bus); | |
1368 | ||
1369 | /* We'll leave the fd open in case this is a kernel bus, since | |
1370 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1371 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1372 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1373 | } |
1374 | ||
718db961 LP |
1375 | static void bus_enter_closing(sd_bus *bus) { |
1376 | assert(bus); | |
1377 | ||
1378 | if (bus->state != BUS_OPENING && | |
1379 | bus->state != BUS_AUTHENTICATING && | |
1380 | bus->state != BUS_HELLO && | |
1381 | bus->state != BUS_RUNNING) | |
1382 | return; | |
1383 | ||
1384 | bus->state = BUS_CLOSING; | |
1385 | } | |
1386 | ||
d9f644e2 | 1387 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1388 | assert_return(bus, NULL); |
de1c301e | 1389 | |
e4ee6e5c | 1390 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1391 | |
de1c301e LP |
1392 | return bus; |
1393 | } | |
1394 | ||
d9f644e2 | 1395 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1396 | unsigned i; |
5b1bc83f LP |
1397 | |
1398 | if (!bus) | |
1399 | return NULL; | |
de1c301e | 1400 | |
f389bf15 LP |
1401 | i = REFCNT_DEC(bus->n_ref); |
1402 | if (i > 0) | |
1403 | return NULL; | |
1404 | ||
1405 | bus_free(bus); | |
de1c301e LP |
1406 | return NULL; |
1407 | } | |
1408 | ||
d9f644e2 | 1409 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1410 | |
1411 | assert_return(bus, -EINVAL); | |
1412 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1413 | |
f54514f3 | 1414 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1415 | } |
1416 | ||
d9f644e2 | 1417 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1418 | int r; |
1419 | ||
d6888822 LP |
1420 | assert_return(bus, -EINVAL); |
1421 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1422 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1423 | |
09365592 LP |
1424 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1425 | return 0; | |
1426 | ||
d728d708 | 1427 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1428 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1429 | return 0; |
1430 | ||
20902f3e | 1431 | r = bus_ensure_running(bus); |
d728d708 LP |
1432 | if (r < 0) |
1433 | return r; | |
de1c301e | 1434 | |
d728d708 LP |
1435 | return bus->can_fds; |
1436 | } | |
1437 | ||
1438 | return bus_type_is_valid(type); | |
de1c301e LP |
1439 | } |
1440 | ||
f7fce345 | 1441 | _public_ int sd_bus_get_owner_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1442 | int r; |
de1c301e | 1443 | |
d6888822 | 1444 | assert_return(bus, -EINVAL); |
f7fce345 | 1445 | assert_return(id, -EINVAL); |
d6888822 | 1446 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1447 | |
20902f3e | 1448 | r = bus_ensure_running(bus); |
d728d708 LP |
1449 | if (r < 0) |
1450 | return r; | |
de1c301e | 1451 | |
f7fce345 | 1452 | *id = bus->server_id; |
d728d708 | 1453 | return 0; |
de1c301e LP |
1454 | } |
1455 | ||
3df7a7e6 | 1456 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1457 | assert(b); |
de1c301e LP |
1458 | assert(m); |
1459 | ||
aea93deb LP |
1460 | if (m->sealed) { |
1461 | /* If we copy the same message to multiple | |
693eb9a2 | 1462 | * destinations, avoid using the same cookie |
aea93deb | 1463 | * numbers. */ |
693eb9a2 | 1464 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1465 | return 0; |
aea93deb | 1466 | } |
de1c301e | 1467 | |
3df7a7e6 LP |
1468 | if (timeout == 0) |
1469 | timeout = BUS_DEFAULT_TIMEOUT; | |
1470 | ||
693eb9a2 | 1471 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1472 | } |
1473 | ||
e1c433c6 LP |
1474 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
1475 | assert(b); | |
1476 | ||
6f285378 | 1477 | /* Do packet version and endianness already match? */ |
e1c433c6 LP |
1478 | if ((b->message_version == 0 || b->message_version == (*m)->header->version) && |
1479 | (b->message_endian == 0 || b->message_endian == (*m)->header->endian)) | |
1480 | return 0; | |
1481 | ||
1482 | /* No? Then remarshal! */ | |
1483 | return bus_message_remarshal(b, m); | |
1484 | } | |
1485 | ||
7adc46fc LP |
1486 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1487 | assert(b); | |
1488 | assert(m); | |
1489 | ||
7adc46fc LP |
1490 | /* The bus specification says the serial number cannot be 0, |
1491 | * hence let's fill something in for synthetic messages. Since | |
1492 | * synthetic messages might have a fake sender and we don't | |
1493 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1494 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1495 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1496 | * even though kdbus can do 64bit. */ | |
1497 | ||
3df7a7e6 | 1498 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1499 | } |
1500 | ||
069f5e61 | 1501 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1502 | int r; |
1503 | ||
718db961 | 1504 | assert(bus); |
2e3db52d | 1505 | assert(m); |
718db961 LP |
1506 | |
1507 | if (bus->is_kernel) | |
069f5e61 | 1508 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1509 | else |
2e3db52d LP |
1510 | r = bus_socket_write_message(bus, m, idx); |
1511 | ||
1512 | if (r <= 0) | |
1513 | return r; | |
1514 | ||
90911bb6 | 1515 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1516 | 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 |
1517 | bus_message_type_to_string(m->header->type), |
1518 | strna(sd_bus_message_get_sender(m)), | |
1519 | strna(sd_bus_message_get_destination(m)), | |
1520 | strna(sd_bus_message_get_path(m)), | |
1521 | strna(sd_bus_message_get_interface(m)), | |
1522 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1523 | BUS_MESSAGE_COOKIE(m), |
1524 | m->reply_cookie, | |
2e3db52d LP |
1525 | strna(m->error.message)); |
1526 | ||
1527 | return r; | |
718db961 LP |
1528 | } |
1529 | ||
de1c301e | 1530 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1531 | int r, ret = 0; |
de1c301e LP |
1532 | |
1533 | assert(bus); | |
89ffcd2a | 1534 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1535 | |
de1c301e LP |
1536 | while (bus->wqueue_size > 0) { |
1537 | ||
069f5e61 | 1538 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1539 | if (r < 0) |
de1c301e | 1540 | return r; |
718db961 | 1541 | else if (r == 0) |
e3017af9 LP |
1542 | /* Didn't do anything this time */ |
1543 | return ret; | |
6629161f | 1544 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1545 | /* Fully written. Let's drop the entry from |
1546 | * the queue. | |
1547 | * | |
1548 | * This isn't particularly optimized, but | |
1549 | * well, this is supposed to be our worst-case | |
1550 | * buffer only, and the socket buffer is | |
1551 | * supposed to be our primary buffer, and if | |
1552 | * it got full, then all bets are off | |
1553 | * anyway. */ | |
1554 | ||
de1c301e | 1555 | bus->wqueue_size --; |
c4e6e242 | 1556 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1557 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1558 | bus->windex = 0; | |
1559 | ||
e3017af9 | 1560 | ret = 1; |
de1c301e LP |
1561 | } |
1562 | } | |
1563 | ||
e3017af9 | 1564 | return ret; |
de1c301e LP |
1565 | } |
1566 | ||
766c5809 | 1567 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1568 | assert(bus); |
1569 | ||
1570 | if (bus->is_kernel) | |
766c5809 | 1571 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1572 | else |
1573 | return bus_socket_read_message(bus); | |
1574 | } | |
1575 | ||
7adc46fc | 1576 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1577 | assert(bus); |
7d22c717 | 1578 | |
821e0756 | 1579 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1580 | return -ENOBUFS; |
1581 | ||
821e0756 | 1582 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1583 | return -ENOMEM; |
1584 | ||
7d22c717 LP |
1585 | return 0; |
1586 | } | |
1587 | ||
766c5809 | 1588 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1589 | int r, ret = 0; |
de1c301e LP |
1590 | |
1591 | assert(bus); | |
1592 | assert(m); | |
89ffcd2a | 1593 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1594 | |
766c5809 LP |
1595 | /* Note that the priority logic is only available on kdbus, |
1596 | * where the rqueue is unused. We check the rqueue here | |
1597 | * anyway, because it's simple... */ | |
1598 | ||
7d22c717 LP |
1599 | for (;;) { |
1600 | if (bus->rqueue_size > 0) { | |
1601 | /* Dispatch a queued message */ | |
de1c301e | 1602 | |
7d22c717 LP |
1603 | *m = bus->rqueue[0]; |
1604 | bus->rqueue_size --; | |
1605 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1606 | return 1; | |
1607 | } | |
de1c301e | 1608 | |
7d22c717 | 1609 | /* Try to read a new message */ |
766c5809 | 1610 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1611 | if (r < 0) |
e3017af9 | 1612 | return r; |
e3017af9 LP |
1613 | if (r == 0) |
1614 | return ret; | |
de1c301e | 1615 | |
2e8d788c | 1616 | ret = 1; |
7d22c717 | 1617 | } |
de1c301e LP |
1618 | } |
1619 | ||
069f5e61 | 1620 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1621 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1622 | int r; |
1623 | ||
d6888822 | 1624 | assert_return(bus, -EINVAL); |
d6888822 LP |
1625 | assert_return(m, -EINVAL); |
1626 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1627 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1628 | |
a3d59cd1 LP |
1629 | if (!BUS_IS_OPEN(bus->state)) |
1630 | return -ENOTCONN; | |
1631 | ||
021a1e78 LP |
1632 | if (m->n_fds > 0) { |
1633 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1634 | if (r < 0) | |
1635 | return r; | |
1636 | if (r == 0) | |
1637 | return -ENOTSUP; | |
1638 | } | |
de1c301e | 1639 | |
693eb9a2 | 1640 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1641 | * is expected */ |
693eb9a2 | 1642 | if (!cookie && !m->sealed) |
0461f8cd | 1643 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1644 | |
3df7a7e6 | 1645 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1646 | if (r < 0) |
1647 | return r; | |
1648 | ||
441d56a1 | 1649 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1650 | * message and place a replacement in m */ |
1651 | r = bus_remarshal_message(bus, &m); | |
1652 | if (r < 0) | |
1653 | return r; | |
1654 | ||
5407f2de LP |
1655 | /* If this is a reply and no reply was requested, then let's |
1656 | * suppress this, if we can */ | |
693eb9a2 | 1657 | if (m->dont_send && !cookie) |
7a37d625 | 1658 | return 1; |
5407f2de | 1659 | |
89ffcd2a | 1660 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1661 | size_t idx = 0; |
1662 | ||
069f5e61 | 1663 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1664 | if (r < 0) { |
441d56a1 | 1665 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1666 | bus_enter_closing(bus); |
441d56a1 LP |
1667 | return -ECONNRESET; |
1668 | } | |
32f46480 | 1669 | |
de1c301e | 1670 | return r; |
32f46480 | 1671 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1672 | /* Wasn't fully written. So let's remember how |
1673 | * much was written. Note that the first entry | |
1674 | * of the wqueue array is always allocated so | |
1675 | * that we always can remember how much was | |
1676 | * written. */ | |
1677 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1678 | bus->wqueue_size = 1; | |
1679 | bus->windex = idx; | |
1680 | } | |
1681 | } else { | |
de1c301e LP |
1682 | /* Just append it to the queue. */ |
1683 | ||
25220239 | 1684 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1685 | return -ENOBUFS; |
1686 | ||
821e0756 | 1687 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1688 | return -ENOMEM; |
1689 | ||
821e0756 | 1690 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1691 | } |
1692 | ||
693eb9a2 LP |
1693 | if (cookie) |
1694 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1695 | |
7a37d625 | 1696 | return 1; |
de1c301e LP |
1697 | } |
1698 | ||
069f5e61 LP |
1699 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1700 | return bus_send_internal(bus, m, cookie, false); | |
1701 | } | |
1702 | ||
693eb9a2 | 1703 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1704 | int r; |
1705 | ||
1706 | assert_return(bus, -EINVAL); | |
911121a7 LP |
1707 | assert_return(m, -EINVAL); |
1708 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1709 | ||
a3d59cd1 LP |
1710 | if (!BUS_IS_OPEN(bus->state)) |
1711 | return -ENOTCONN; | |
1712 | ||
911121a7 LP |
1713 | if (!streq_ptr(m->destination, destination)) { |
1714 | ||
1715 | if (!destination) | |
1716 | return -EEXIST; | |
1717 | ||
1718 | r = sd_bus_message_set_destination(m, destination); | |
1719 | if (r < 0) | |
1720 | return r; | |
1721 | } | |
1722 | ||
693eb9a2 | 1723 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1724 | } |
1725 | ||
de1c301e LP |
1726 | static usec_t calc_elapse(uint64_t usec) { |
1727 | if (usec == (uint64_t) -1) | |
1728 | return 0; | |
1729 | ||
de1c301e LP |
1730 | return now(CLOCK_MONOTONIC) + usec; |
1731 | } | |
1732 | ||
e3017af9 LP |
1733 | static int timeout_compare(const void *a, const void *b) { |
1734 | const struct reply_callback *x = a, *y = b; | |
1735 | ||
1736 | if (x->timeout != 0 && y->timeout == 0) | |
1737 | return -1; | |
1738 | ||
1739 | if (x->timeout == 0 && y->timeout != 0) | |
1740 | return 1; | |
1741 | ||
1742 | if (x->timeout < y->timeout) | |
1743 | return -1; | |
1744 | ||
1745 | if (x->timeout > y->timeout) | |
1746 | return 1; | |
1747 | ||
1748 | return 0; | |
1749 | } | |
1750 | ||
c49b30a2 | 1751 | _public_ int sd_bus_call_async( |
de1c301e | 1752 | sd_bus *bus, |
19befb2d | 1753 | sd_bus_slot **slot, |
e1c433c6 | 1754 | sd_bus_message *_m, |
52f3ba91 | 1755 | sd_bus_message_handler_t callback, |
de1c301e | 1756 | void *userdata, |
19befb2d | 1757 | uint64_t usec) { |
de1c301e | 1758 | |
e1c433c6 | 1759 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1760 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1761 | int r; |
1762 | ||
d6888822 | 1763 | assert_return(bus, -EINVAL); |
d6888822 | 1764 | assert_return(m, -EINVAL); |
40ca29a1 | 1765 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1766 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1767 | assert_return(callback, -EINVAL); |
1768 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1769 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1770 | |
a3d59cd1 LP |
1771 | if (!BUS_IS_OPEN(bus->state)) |
1772 | return -ENOTCONN; | |
1773 | ||
c9fe4af7 | 1774 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1775 | if (r < 0) |
1776 | return r; | |
de1c301e | 1777 | |
3df7a7e6 LP |
1778 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1779 | if (r < 0) | |
1780 | return r; | |
e3017af9 | 1781 | |
3df7a7e6 | 1782 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1783 | if (r < 0) |
1784 | return r; | |
1785 | ||
e1c433c6 LP |
1786 | r = bus_remarshal_message(bus, &m); |
1787 | if (r < 0) | |
1788 | return r; | |
1789 | ||
19befb2d LP |
1790 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1791 | if (!s) | |
de1c301e LP |
1792 | return -ENOMEM; |
1793 | ||
19befb2d | 1794 | s->reply_callback.callback = callback; |
de1c301e | 1795 | |
19befb2d | 1796 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1797 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1798 | if (r < 0) { |
19befb2d | 1799 | s->reply_callback.cookie = 0; |
de1c301e LP |
1800 | return r; |
1801 | } | |
1802 | ||
19befb2d LP |
1803 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1804 | if (s->reply_callback.timeout != 0) { | |
1805 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1806 | if (r < 0) { |
19befb2d | 1807 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1808 | return r; |
1809 | } | |
1810 | } | |
1811 | ||
19befb2d LP |
1812 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1813 | if (r < 0) | |
de1c301e | 1814 | return r; |
de1c301e | 1815 | |
19befb2d LP |
1816 | if (slot) |
1817 | *slot = s; | |
1818 | s = NULL; | |
e3017af9 | 1819 | |
19befb2d | 1820 | return r; |
de1c301e LP |
1821 | } |
1822 | ||
20902f3e | 1823 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1824 | int r; |
1825 | ||
1826 | assert(bus); | |
1827 | ||
718db961 | 1828 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1829 | return -ENOTCONN; |
d728d708 LP |
1830 | if (bus->state == BUS_RUNNING) |
1831 | return 1; | |
89ffcd2a LP |
1832 | |
1833 | for (;;) { | |
1834 | r = sd_bus_process(bus, NULL); | |
1835 | if (r < 0) | |
1836 | return r; | |
d728d708 LP |
1837 | if (bus->state == BUS_RUNNING) |
1838 | return 1; | |
e3017af9 LP |
1839 | if (r > 0) |
1840 | continue; | |
89ffcd2a LP |
1841 | |
1842 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1843 | if (r < 0) | |
1844 | return r; | |
1845 | } | |
1846 | } | |
1847 | ||
97f82db3 | 1848 | _public_ int sd_bus_call( |
de1c301e | 1849 | sd_bus *bus, |
97f82db3 | 1850 | sd_bus_message *_m, |
de1c301e LP |
1851 | uint64_t usec, |
1852 | sd_bus_error *error, | |
1853 | sd_bus_message **reply) { | |
1854 | ||
97f82db3 | 1855 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1856 | usec_t timeout; |
693eb9a2 | 1857 | uint64_t cookie; |
7d22c717 LP |
1858 | unsigned i; |
1859 | int r; | |
de1c301e | 1860 | |
97f82db3 | 1861 | assert_return(bus, -EINVAL); |
97f82db3 KS |
1862 | assert_return(m, -EINVAL); |
1863 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
1864 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1865 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1866 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1867 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
97f82db3 | 1868 | |
a3d59cd1 LP |
1869 | if (!BUS_IS_OPEN(bus->state)) |
1870 | return -ENOTCONN; | |
1871 | ||
97f82db3 KS |
1872 | r = bus_ensure_running(bus); |
1873 | if (r < 0) | |
1874 | return r; | |
1875 | ||
a43b9ca3 | 1876 | i = bus->rqueue_size; |
97f82db3 KS |
1877 | |
1878 | r = bus_seal_message(bus, m, usec); | |
1879 | if (r < 0) | |
1880 | return r; | |
1881 | ||
1882 | r = bus_remarshal_message(bus, &m); | |
1883 | if (r < 0) | |
1884 | return r; | |
1885 | ||
069f5e61 | 1886 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e LP |
1887 | if (r < 0) |
1888 | return r; | |
1889 | ||
3df7a7e6 | 1890 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1891 | |
1892 | for (;;) { | |
1893 | usec_t left; | |
de1c301e | 1894 | |
7d22c717 LP |
1895 | while (i < bus->rqueue_size) { |
1896 | sd_bus_message *incoming = NULL; | |
1897 | ||
1898 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1899 | |
693eb9a2 | 1900 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1901 | /* Found a match! */ |
1902 | ||
7d22c717 LP |
1903 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1904 | bus->rqueue_size--; | |
1905 | ||
40ca29a1 | 1906 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 1907 | |
2ce97e2b LP |
1908 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
1909 | if (reply) | |
1910 | *reply = incoming; | |
1911 | else | |
1912 | sd_bus_message_unref(incoming); | |
1913 | ||
1914 | return 1; | |
1915 | } | |
1916 | ||
1917 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
b7f247e0 | 1918 | |
a43b9ca3 | 1919 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1920 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1921 | else |
1922 | r = -EIO; | |
de1c301e LP |
1923 | |
1924 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 1925 | return r; |
a8a07f89 | 1926 | |
693eb9a2 | 1927 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
1928 | bus->unique_name && |
1929 | incoming->sender && | |
1930 | streq(bus->unique_name, incoming->sender)) { | |
1931 | ||
7d22c717 LP |
1932 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1933 | bus->rqueue_size--; | |
1934 | ||
a8a07f89 LP |
1935 | /* Our own message? Somebody is trying |
1936 | * to send its own client a message, | |
1937 | * let's not dead-lock, let's fail | |
1938 | * immediately. */ | |
1939 | ||
1940 | sd_bus_message_unref(incoming); | |
1941 | return -ELOOP; | |
de1c301e LP |
1942 | } |
1943 | ||
de1c301e | 1944 | /* Try to read more, right-away */ |
7d22c717 | 1945 | i++; |
de1c301e | 1946 | } |
7d22c717 | 1947 | |
766c5809 | 1948 | r = bus_read_message(bus, false, 0); |
32f46480 | 1949 | if (r < 0) { |
441d56a1 | 1950 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1951 | bus_enter_closing(bus); |
441d56a1 LP |
1952 | return -ECONNRESET; |
1953 | } | |
32f46480 | 1954 | |
a43b9ca3 | 1955 | return r; |
32f46480 | 1956 | } |
7d22c717 | 1957 | if (r > 0) |
e3017af9 | 1958 | continue; |
de1c301e LP |
1959 | |
1960 | if (timeout > 0) { | |
1961 | usec_t n; | |
1962 | ||
1963 | n = now(CLOCK_MONOTONIC); | |
1964 | if (n >= timeout) | |
1965 | return -ETIMEDOUT; | |
1966 | ||
1967 | left = timeout - n; | |
1968 | } else | |
1969 | left = (uint64_t) -1; | |
1970 | ||
e3017af9 | 1971 | r = bus_poll(bus, true, left); |
de1c301e LP |
1972 | if (r < 0) |
1973 | return r; | |
f8e11cda LP |
1974 | if (r == 0) |
1975 | return -ETIMEDOUT; | |
de1c301e LP |
1976 | |
1977 | r = dispatch_wqueue(bus); | |
32f46480 | 1978 | if (r < 0) { |
441d56a1 | 1979 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1980 | bus_enter_closing(bus); |
441d56a1 LP |
1981 | return -ECONNRESET; |
1982 | } | |
32f46480 | 1983 | |
de1c301e | 1984 | return r; |
32f46480 | 1985 | } |
de1c301e LP |
1986 | } |
1987 | } | |
1988 | ||
d9f644e2 | 1989 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1990 | |
1991 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1992 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1993 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1994 | |
e82c9509 | 1995 | return bus->input_fd; |
de1c301e LP |
1996 | } |
1997 | ||
d9f644e2 | 1998 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1999 | int flags = 0; |
2000 | ||
d6888822 | 2001 | assert_return(bus, -EINVAL); |
d6888822 | 2002 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2003 | |
a3d59cd1 LP |
2004 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2005 | return -ENOTCONN; | |
2006 | ||
de1c301e LP |
2007 | if (bus->state == BUS_OPENING) |
2008 | flags |= POLLOUT; | |
89ffcd2a LP |
2009 | else if (bus->state == BUS_AUTHENTICATING) { |
2010 | ||
2181a7f5 | 2011 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2012 | flags |= POLLOUT; |
2013 | ||
2014 | flags |= POLLIN; | |
2015 | ||
2016 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2017 | if (bus->rqueue_size <= 0) |
2018 | flags |= POLLIN; | |
2019 | if (bus->wqueue_size > 0) | |
2020 | flags |= POLLOUT; | |
2021 | } | |
2022 | ||
2023 | return flags; | |
2024 | } | |
2025 | ||
d9f644e2 | 2026 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2027 | struct reply_callback *c; |
2028 | ||
d6888822 LP |
2029 | assert_return(bus, -EINVAL); |
2030 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2031 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2032 | |
a3d59cd1 LP |
2033 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2034 | return -ENOTCONN; | |
2035 | ||
8f8f05a9 LP |
2036 | if (bus->track_queue) { |
2037 | *timeout_usec = 0; | |
2038 | return 1; | |
2039 | } | |
2040 | ||
718db961 LP |
2041 | if (bus->state == BUS_CLOSING) { |
2042 | *timeout_usec = 0; | |
2043 | return 1; | |
2044 | } | |
2045 | ||
e3017af9 LP |
2046 | if (bus->state == BUS_AUTHENTICATING) { |
2047 | *timeout_usec = bus->auth_timeout; | |
2048 | return 1; | |
2049 | } | |
2050 | ||
adee69fa LP |
2051 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2052 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2053 | return 0; |
adee69fa | 2054 | } |
e3017af9 | 2055 | |
8efd6381 LP |
2056 | if (bus->rqueue_size > 0) { |
2057 | *timeout_usec = 0; | |
2058 | return 1; | |
2059 | } | |
2060 | ||
e3017af9 | 2061 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2062 | if (!c) { |
2063 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2064 | return 0; |
adee69fa | 2065 | } |
e3017af9 | 2066 | |
19befb2d LP |
2067 | if (c->timeout == 0) { |
2068 | *timeout_usec = (uint64_t) -1; | |
2069 | return 0; | |
2070 | } | |
2071 | ||
e3017af9 LP |
2072 | *timeout_usec = c->timeout; |
2073 | return 1; | |
2074 | } | |
2075 | ||
2076 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2077 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2078 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2079 | struct reply_callback *c; |
1b64f838 | 2080 | sd_bus_slot *slot; |
e3017af9 LP |
2081 | usec_t n; |
2082 | int r; | |
2083 | ||
2084 | assert(bus); | |
2085 | ||
2086 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2087 | if (!c) | |
2088 | return 0; | |
2089 | ||
2090 | n = now(CLOCK_MONOTONIC); | |
2091 | if (c->timeout > n) | |
2092 | return 0; | |
2093 | ||
eb01ba5d LP |
2094 | r = bus_message_new_synthetic_error( |
2095 | bus, | |
693eb9a2 | 2096 | c->cookie, |
14c24659 | 2097 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2098 | &m); |
2099 | if (r < 0) | |
2100 | return r; | |
2101 | ||
34a2c9e8 LP |
2102 | m->sender = "org.freedesktop.DBus"; |
2103 | ||
7adc46fc | 2104 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2105 | if (r < 0) |
2106 | return r; | |
2107 | ||
e3017af9 | 2108 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2109 | c->timeout = 0; |
2110 | ||
c9fe4af7 | 2111 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2112 | c->cookie = 0; |
2113 | ||
1b64f838 | 2114 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2115 | |
718db961 LP |
2116 | bus->iteration_counter ++; |
2117 | ||
1b64f838 LP |
2118 | bus->current_message = m; |
2119 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2120 | bus->current_handler = c->callback; |
2121 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2122 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2123 | bus->current_userdata = NULL; |
2124 | bus->current_handler = NULL; | |
d974ad05 | 2125 | bus->current_slot = NULL; |
19befb2d | 2126 | bus->current_message = NULL; |
718db961 | 2127 | |
1b64f838 LP |
2128 | if (slot->floating) { |
2129 | bus_slot_disconnect(slot); | |
2130 | sd_bus_slot_unref(slot); | |
2131 | } | |
2132 | ||
d974ad05 DH |
2133 | sd_bus_slot_unref(slot); |
2134 | ||
1b64f838 | 2135 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2136 | } |
2137 | ||
9d373862 LP |
2138 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2139 | assert(bus); | |
2140 | assert(m); | |
2141 | ||
2142 | if (bus->state != BUS_HELLO) | |
2143 | return 0; | |
2144 | ||
2145 | /* Let's make sure the first message on the bus is the HELLO | |
2146 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2147 | * here (we leave that to the usual handling), we just verify |
2148 | * we don't let any earlier msg through. */ | |
9d373862 | 2149 | |
40ca29a1 LP |
2150 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2151 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2152 | return -EIO; |
2153 | ||
19befb2d | 2154 | if (m->reply_cookie != 1) |
9d373862 LP |
2155 | return -EIO; |
2156 | ||
2157 | return 0; | |
2158 | } | |
2159 | ||
a652755d | 2160 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2161 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2162 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2163 | struct reply_callback *c; |
1b64f838 | 2164 | sd_bus_slot *slot; |
a652755d LP |
2165 | int r; |
2166 | ||
2167 | assert(bus); | |
2168 | assert(m); | |
2169 | ||
40ca29a1 LP |
2170 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2171 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2172 | return 0; |
2173 | ||
09365592 LP |
2174 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2175 | return 0; | |
2176 | ||
2177 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2178 | return 0; | |
2179 | ||
c9fe4af7 | 2180 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2181 | if (!c) |
2182 | return 0; | |
2183 | ||
19befb2d | 2184 | c->cookie = 0; |
19befb2d | 2185 | |
1b64f838 | 2186 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2187 | |
2ce97e2b LP |
2188 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2189 | ||
2190 | /* If the reply contained a file descriptor which we | |
2191 | * didn't want we pass an error instead. */ | |
2192 | ||
2193 | r = bus_message_new_synthetic_error( | |
2194 | bus, | |
2195 | m->reply_cookie, | |
2196 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2197 | &synthetic_reply); | |
2198 | if (r < 0) | |
1b64f838 | 2199 | return r; |
2ce97e2b LP |
2200 | |
2201 | r = bus_seal_synthetic_message(bus, synthetic_reply); | |
2202 | if (r < 0) | |
1b64f838 | 2203 | return r; |
2ce97e2b LP |
2204 | |
2205 | m = synthetic_reply; | |
2206 | } else { | |
2207 | r = sd_bus_message_rewind(m, true); | |
2208 | if (r < 0) | |
1b64f838 | 2209 | return r; |
2ce97e2b | 2210 | } |
88fe224c | 2211 | |
1b64f838 LP |
2212 | if (c->timeout != 0) { |
2213 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2214 | c->timeout = 0; | |
2215 | } | |
19befb2d | 2216 | |
1b64f838 | 2217 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2218 | bus->current_handler = c->callback; |
2219 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2220 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2221 | bus->current_userdata = NULL; |
2222 | bus->current_handler = NULL; | |
d974ad05 | 2223 | bus->current_slot = NULL; |
a652755d | 2224 | |
19befb2d LP |
2225 | if (slot->floating) { |
2226 | bus_slot_disconnect(slot); | |
2227 | sd_bus_slot_unref(slot); | |
2228 | } | |
2229 | ||
d974ad05 DH |
2230 | sd_bus_slot_unref(slot); |
2231 | ||
1b64f838 | 2232 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2233 | } |
2234 | ||
2235 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2236 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2237 | struct filter_callback *l; |
2238 | int r; | |
2239 | ||
392d5b37 LP |
2240 | assert(bus); |
2241 | assert(m); | |
2242 | ||
7286037f LP |
2243 | do { |
2244 | bus->filter_callbacks_modified = false; | |
2245 | ||
2246 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2247 | sd_bus_slot *slot; |
7286037f LP |
2248 | |
2249 | if (bus->filter_callbacks_modified) | |
2250 | break; | |
2251 | ||
2252 | /* Don't run this more than once per iteration */ | |
2253 | if (l->last_iteration == bus->iteration_counter) | |
2254 | continue; | |
2255 | ||
2256 | l->last_iteration = bus->iteration_counter; | |
2257 | ||
88fe224c LP |
2258 | r = sd_bus_message_rewind(m, true); |
2259 | if (r < 0) | |
2260 | return r; | |
2261 | ||
1b64f838 LP |
2262 | slot = container_of(l, sd_bus_slot, filter_callback); |
2263 | ||
2264 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2265 | bus->current_handler = l->callback; |
2266 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2267 | r = l->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2268 | bus->current_userdata = NULL; |
2269 | bus->current_handler = NULL; | |
1b64f838 | 2270 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2271 | |
ebcf1f97 | 2272 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2273 | if (r != 0) |
2274 | return r; | |
2275 | ||
2276 | } | |
2277 | ||
2278 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2279 | |
2280 | return 0; | |
2281 | } | |
2282 | ||
392d5b37 | 2283 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2284 | int r; |
2285 | ||
392d5b37 LP |
2286 | assert(bus); |
2287 | assert(m); | |
2288 | ||
7286037f LP |
2289 | do { |
2290 | bus->match_callbacks_modified = false; | |
2291 | ||
eb01ba5d | 2292 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2293 | if (r != 0) |
2294 | return r; | |
2295 | ||
2296 | } while (bus->match_callbacks_modified); | |
2297 | ||
2298 | return 0; | |
392d5b37 LP |
2299 | } |
2300 | ||
b9bf7e2b LP |
2301 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2302 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2303 | int r; | |
2304 | ||
2305 | assert(bus); | |
2306 | assert(m); | |
2307 | ||
09365592 LP |
2308 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2309 | return 0; | |
2310 | ||
758bf0c7 LP |
2311 | if (bus->manual_peer_interface) |
2312 | return 0; | |
2313 | ||
40ca29a1 | 2314 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2315 | return 0; |
2316 | ||
2317 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2318 | return 0; | |
2319 | ||
0461f8cd | 2320 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2321 | return 1; |
2322 | ||
2323 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2324 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2325 | else if (streq_ptr(m->member, "GetMachineId")) { |
2326 | sd_id128_t id; | |
2327 | char sid[33]; | |
2328 | ||
2329 | r = sd_id128_get_machine(&id); | |
2330 | if (r < 0) | |
2331 | return r; | |
2332 | ||
df2d202e | 2333 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2334 | if (r < 0) |
2335 | return r; | |
2336 | ||
2337 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2338 | } else { | |
29ddb38f | 2339 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2340 | m, &reply, |
40ca29a1 | 2341 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2342 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2343 | } |
2344 | ||
2345 | if (r < 0) | |
2346 | return r; | |
2347 | ||
2348 | r = sd_bus_send(bus, reply, NULL); | |
2349 | if (r < 0) | |
2350 | return r; | |
2351 | ||
2352 | return 1; | |
2353 | } | |
2354 | ||
2ce97e2b LP |
2355 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2356 | assert(bus); | |
2357 | assert(m); | |
2358 | ||
2359 | /* If we got a message with a file descriptor which we didn't | |
2360 | * want to accept, then let's drop it. How can this even | |
2361 | * happen? For example, when the kernel queues a message into | |
2362 | * an activatable names's queue which allows fds, and then is | |
2363 | * delivered to us later even though we ourselves did not | |
2364 | * negotiate it. */ | |
2365 | ||
09365592 LP |
2366 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2367 | return 0; | |
2368 | ||
2ce97e2b LP |
2369 | if (m->n_fds <= 0) |
2370 | return 0; | |
2371 | ||
2372 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2373 | return 0; | |
2374 | ||
2375 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2376 | return 1; /* just eat it up */ | |
2377 | ||
2378 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2379 | } | |
2380 | ||
992c052c | 2381 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2382 | int r; |
2383 | ||
2384 | assert(bus); | |
992c052c | 2385 | assert(m); |
e3017af9 | 2386 | |
19befb2d | 2387 | bus->current_message = m; |
992c052c | 2388 | bus->iteration_counter++; |
e3017af9 | 2389 | |
42c4ebcb | 2390 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", |
4cdf0751 | 2391 | bus_message_type_to_string(m->header->type), |
40ca29a1 | 2392 | strna(sd_bus_message_get_sender(m)), |
4cdf0751 | 2393 | strna(sd_bus_message_get_destination(m)), |
40ca29a1 LP |
2394 | strna(sd_bus_message_get_path(m)), |
2395 | strna(sd_bus_message_get_interface(m)), | |
4cdf0751 | 2396 | strna(sd_bus_message_get_member(m)), |
42c4ebcb LP |
2397 | BUS_MESSAGE_COOKIE(m), |
2398 | m->reply_cookie, | |
4cdf0751 | 2399 | strna(m->error.message)); |
40ca29a1 | 2400 | |
992c052c LP |
2401 | r = process_hello(bus, m); |
2402 | if (r != 0) | |
affff0b6 | 2403 | goto finish; |
a652755d | 2404 | |
992c052c LP |
2405 | r = process_reply(bus, m); |
2406 | if (r != 0) | |
affff0b6 | 2407 | goto finish; |
e3017af9 | 2408 | |
2ce97e2b LP |
2409 | r = process_fd_check(bus, m); |
2410 | if (r != 0) | |
2411 | goto finish; | |
2412 | ||
992c052c LP |
2413 | r = process_filter(bus, m); |
2414 | if (r != 0) | |
affff0b6 | 2415 | goto finish; |
a652755d | 2416 | |
992c052c LP |
2417 | r = process_match(bus, m); |
2418 | if (r != 0) | |
affff0b6 | 2419 | goto finish; |
a652755d | 2420 | |
992c052c LP |
2421 | r = process_builtin(bus, m); |
2422 | if (r != 0) | |
affff0b6 LP |
2423 | goto finish; |
2424 | ||
2425 | r = bus_process_object(bus, m); | |
a652755d | 2426 | |
affff0b6 | 2427 | finish: |
19befb2d | 2428 | bus->current_message = NULL; |
affff0b6 | 2429 | return r; |
29ddb38f | 2430 | } |
88fe224c | 2431 | |
8f8f05a9 LP |
2432 | static int dispatch_track(sd_bus *bus) { |
2433 | assert(bus); | |
2434 | ||
2435 | if (!bus->track_queue) | |
2436 | return 0; | |
2437 | ||
2438 | bus_track_dispatch(bus->track_queue); | |
2439 | return 1; | |
2440 | } | |
2441 | ||
766c5809 | 2442 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2443 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2444 | int r; |
a652755d | 2445 | |
29ddb38f | 2446 | assert(bus); |
992c052c | 2447 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2448 | |
992c052c LP |
2449 | r = process_timeout(bus); |
2450 | if (r != 0) | |
2451 | goto null_message; | |
7286037f | 2452 | |
992c052c LP |
2453 | r = dispatch_wqueue(bus); |
2454 | if (r != 0) | |
2455 | goto null_message; | |
7286037f | 2456 | |
8f8f05a9 LP |
2457 | r = dispatch_track(bus); |
2458 | if (r != 0) | |
2459 | goto null_message; | |
2460 | ||
766c5809 | 2461 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2462 | if (r < 0) |
2463 | return r; | |
2464 | if (!m) | |
2465 | goto null_message; | |
7286037f | 2466 | |
992c052c LP |
2467 | r = process_message(bus, m); |
2468 | if (r != 0) | |
2469 | goto null_message; | |
7286037f | 2470 | |
992c052c LP |
2471 | if (ret) { |
2472 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2473 | if (r < 0) |
2474 | return r; | |
e3017af9 | 2475 | |
992c052c LP |
2476 | *ret = m; |
2477 | m = NULL; | |
2478 | return 1; | |
2479 | } | |
a652755d | 2480 | |
40ca29a1 | 2481 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2482 | |
dc74ce9b LP |
2483 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2484 | strna(sd_bus_message_get_sender(m)), | |
2485 | strna(sd_bus_message_get_path(m)), | |
2486 | strna(sd_bus_message_get_interface(m)), | |
2487 | strna(sd_bus_message_get_member(m))); | |
2488 | ||
992c052c | 2489 | r = sd_bus_reply_method_errorf( |
df2d202e | 2490 | m, |
40ca29a1 | 2491 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2492 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2493 | if (r < 0) |
2494 | return r; | |
2495 | } | |
e3017af9 | 2496 | |
992c052c | 2497 | return 1; |
0a72c2bd | 2498 | |
992c052c LP |
2499 | null_message: |
2500 | if (r >= 0 && ret) | |
2501 | *ret = NULL; | |
0a72c2bd | 2502 | |
992c052c | 2503 | return r; |
29ddb38f | 2504 | } |
0a72c2bd | 2505 | |
718db961 LP |
2506 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2507 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2508 | struct reply_callback *c; | |
2509 | int r; | |
2510 | ||
2511 | assert(bus); | |
2512 | assert(bus->state == BUS_CLOSING); | |
2513 | ||
c9fe4af7 | 2514 | c = ordered_hashmap_first(bus->reply_callbacks); |
718db961 | 2515 | if (c) { |
ebcf1f97 | 2516 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2517 | sd_bus_slot *slot; |
ebcf1f97 | 2518 | |
718db961 LP |
2519 | /* First, fail all outstanding method calls */ |
2520 | r = bus_message_new_synthetic_error( | |
2521 | bus, | |
693eb9a2 | 2522 | c->cookie, |
14c24659 | 2523 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2524 | &m); |
2525 | if (r < 0) | |
2526 | return r; | |
2527 | ||
7adc46fc | 2528 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2529 | if (r < 0) |
2530 | return r; | |
2531 | ||
19befb2d | 2532 | if (c->timeout != 0) { |
718db961 | 2533 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2534 | c->timeout = 0; |
2535 | } | |
718db961 | 2536 | |
c9fe4af7 | 2537 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2538 | c->cookie = 0; |
2539 | ||
1b64f838 | 2540 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2541 | |
718db961 LP |
2542 | bus->iteration_counter++; |
2543 | ||
1b64f838 LP |
2544 | bus->current_message = m; |
2545 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2546 | bus->current_handler = c->callback; |
2547 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2548 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2549 | bus->current_userdata = NULL; |
2550 | bus->current_handler = NULL; | |
d974ad05 | 2551 | bus->current_slot = NULL; |
1b64f838 LP |
2552 | bus->current_message = NULL; |
2553 | ||
2554 | if (slot->floating) { | |
2555 | bus_slot_disconnect(slot); | |
2556 | sd_bus_slot_unref(slot); | |
2557 | } | |
718db961 | 2558 | |
d974ad05 DH |
2559 | sd_bus_slot_unref(slot); |
2560 | ||
1b64f838 | 2561 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2562 | } |
2563 | ||
2564 | /* Then, synthesize a Disconnected message */ | |
2565 | r = sd_bus_message_new_signal( | |
2566 | bus, | |
151b9b96 | 2567 | &m, |
718db961 LP |
2568 | "/org/freedesktop/DBus/Local", |
2569 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2570 | "Disconnected"); |
718db961 LP |
2571 | if (r < 0) |
2572 | return r; | |
2573 | ||
34a2c9e8 LP |
2574 | m->sender = "org.freedesktop.DBus.Local"; |
2575 | ||
7adc46fc | 2576 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2577 | if (r < 0) |
2578 | return r; | |
2579 | ||
2580 | sd_bus_close(bus); | |
2581 | ||
19befb2d | 2582 | bus->current_message = m; |
718db961 LP |
2583 | bus->iteration_counter++; |
2584 | ||
2585 | r = process_filter(bus, m); | |
2586 | if (r != 0) | |
2587 | goto finish; | |
2588 | ||
2589 | r = process_match(bus, m); | |
2590 | if (r != 0) | |
2591 | goto finish; | |
2592 | ||
2593 | if (ret) { | |
2594 | *ret = m; | |
2595 | m = NULL; | |
2596 | } | |
2597 | ||
2598 | r = 1; | |
2599 | ||
2600 | finish: | |
19befb2d LP |
2601 | bus->current_message = NULL; |
2602 | ||
718db961 LP |
2603 | return r; |
2604 | } | |
2605 | ||
766c5809 | 2606 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2607 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2608 | int r; |
0a72c2bd | 2609 | |
992c052c LP |
2610 | /* Returns 0 when we didn't do anything. This should cause the |
2611 | * caller to invoke sd_bus_wait() before returning the next | |
2612 | * time. Returns > 0 when we did something, which possibly | |
2613 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2614 | |
d6888822 LP |
2615 | assert_return(bus, -EINVAL); |
2616 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2617 | |
992c052c | 2618 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2619 | assert_return(!bus->current_message, -EBUSY); |
2620 | assert(!bus->current_slot); | |
0a72c2bd | 2621 | |
992c052c | 2622 | switch (bus->state) { |
0a72c2bd | 2623 | |
992c052c | 2624 | case BUS_UNSET: |
992c052c | 2625 | return -ENOTCONN; |
0a72c2bd | 2626 | |
6d6f4904 LP |
2627 | case BUS_CLOSED: |
2628 | return -ECONNRESET; | |
2629 | ||
992c052c LP |
2630 | case BUS_OPENING: |
2631 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2632 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2633 | bus_enter_closing(bus); |
2634 | r = 1; | |
2635 | } else if (r < 0) | |
29ddb38f | 2636 | return r; |
992c052c LP |
2637 | if (ret) |
2638 | *ret = NULL; | |
a652755d LP |
2639 | return r; |
2640 | ||
992c052c | 2641 | case BUS_AUTHENTICATING: |
992c052c | 2642 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2643 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2644 | bus_enter_closing(bus); |
2645 | r = 1; | |
2646 | } else if (r < 0) | |
29ddb38f | 2647 | return r; |
718db961 | 2648 | |
992c052c LP |
2649 | if (ret) |
2650 | *ret = NULL; | |
718db961 | 2651 | |
992c052c | 2652 | return r; |
a652755d | 2653 | |
992c052c LP |
2654 | case BUS_RUNNING: |
2655 | case BUS_HELLO: | |
766c5809 | 2656 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2657 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2658 | bus_enter_closing(bus); |
2659 | r = 1; | |
2660 | ||
2661 | if (ret) | |
2662 | *ret = NULL; | |
2663 | } | |
43a43f50 | 2664 | |
43a43f50 | 2665 | return r; |
718db961 LP |
2666 | |
2667 | case BUS_CLOSING: | |
2668 | return process_closing(bus, ret); | |
992c052c | 2669 | } |
43a43f50 | 2670 | |
992c052c | 2671 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2672 | } |
2673 | ||
766c5809 LP |
2674 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2675 | return bus_process_internal(bus, false, 0, ret); | |
2676 | } | |
2677 | ||
2678 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2679 | return bus_process_internal(bus, true, priority, ret); | |
2680 | } | |
2681 | ||
992c052c LP |
2682 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2683 | struct pollfd p[2] = {}; | |
2684 | int r, e, n; | |
2685 | struct timespec ts; | |
3a43da28 | 2686 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2687 | |
2688 | assert(bus); | |
718db961 LP |
2689 | |
2690 | if (bus->state == BUS_CLOSING) | |
2691 | return 1; | |
2692 | ||
a3d59cd1 LP |
2693 | if (!BUS_IS_OPEN(bus->state)) |
2694 | return -ENOTCONN; | |
adcdb374 | 2695 | |
992c052c LP |
2696 | e = sd_bus_get_events(bus); |
2697 | if (e < 0) | |
2698 | return e; | |
adcdb374 | 2699 | |
992c052c | 2700 | if (need_more) |
8efd6381 LP |
2701 | /* The caller really needs some more data, he doesn't |
2702 | * care about what's already read, or any timeouts | |
2703 | * except its own.*/ | |
992c052c | 2704 | e |= POLLIN; |
992c052c | 2705 | else { |
8efd6381 LP |
2706 | usec_t until; |
2707 | /* The caller wants to process if there's something to | |
2708 | * process, but doesn't care otherwise */ | |
2709 | ||
2710 | r = sd_bus_get_timeout(bus, &until); | |
2711 | if (r < 0) | |
2712 | return r; | |
2713 | if (r > 0) { | |
2714 | usec_t nw; | |
2715 | nw = now(CLOCK_MONOTONIC); | |
2716 | m = until > nw ? until - nw : 0; | |
2717 | } | |
992c052c | 2718 | } |
adcdb374 | 2719 | |
992c052c LP |
2720 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2721 | m = timeout_usec; | |
adcdb374 | 2722 | |
992c052c LP |
2723 | p[0].fd = bus->input_fd; |
2724 | if (bus->output_fd == bus->input_fd) { | |
2725 | p[0].events = e; | |
2726 | n = 1; | |
2727 | } else { | |
2728 | p[0].events = e & POLLIN; | |
2729 | p[1].fd = bus->output_fd; | |
2730 | p[1].events = e & POLLOUT; | |
2731 | n = 2; | |
adcdb374 LP |
2732 | } |
2733 | ||
992c052c | 2734 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2735 | if (r < 0) |
992c052c | 2736 | return -errno; |
adcdb374 | 2737 | |
992c052c | 2738 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2739 | } |
2740 | ||
d9f644e2 | 2741 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2742 | |
d6888822 | 2743 | assert_return(bus, -EINVAL); |
d6888822 | 2744 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2745 | |
718db961 LP |
2746 | if (bus->state == BUS_CLOSING) |
2747 | return 0; | |
2748 | ||
a3d59cd1 LP |
2749 | if (!BUS_IS_OPEN(bus->state)) |
2750 | return -ENOTCONN; | |
718db961 | 2751 | |
992c052c LP |
2752 | if (bus->rqueue_size > 0) |
2753 | return 0; | |
9db76355 | 2754 | |
992c052c LP |
2755 | return bus_poll(bus, false, timeout_usec); |
2756 | } | |
9db76355 | 2757 | |
d9f644e2 | 2758 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2759 | int r; |
9db76355 | 2760 | |
d6888822 | 2761 | assert_return(bus, -EINVAL); |
d6888822 | 2762 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2763 | |
718db961 LP |
2764 | if (bus->state == BUS_CLOSING) |
2765 | return 0; | |
2766 | ||
a3d59cd1 LP |
2767 | if (!BUS_IS_OPEN(bus->state)) |
2768 | return -ENOTCONN; | |
718db961 | 2769 | |
992c052c LP |
2770 | r = bus_ensure_running(bus); |
2771 | if (r < 0) | |
2772 | return r; | |
9db76355 | 2773 | |
992c052c LP |
2774 | if (bus->wqueue_size <= 0) |
2775 | return 0; | |
9db76355 | 2776 | |
992c052c LP |
2777 | for (;;) { |
2778 | r = dispatch_wqueue(bus); | |
32f46480 | 2779 | if (r < 0) { |
441d56a1 | 2780 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2781 | bus_enter_closing(bus); |
441d56a1 LP |
2782 | return -ECONNRESET; |
2783 | } | |
32f46480 | 2784 | |
9db76355 | 2785 | return r; |
32f46480 | 2786 | } |
9db76355 | 2787 | |
992c052c LP |
2788 | if (bus->wqueue_size <= 0) |
2789 | return 0; | |
9db76355 | 2790 | |
992c052c | 2791 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2792 | if (r < 0) |
2793 | return r; | |
9db76355 | 2794 | } |
9db76355 LP |
2795 | } |
2796 | ||
19befb2d LP |
2797 | _public_ int sd_bus_add_filter( |
2798 | sd_bus *bus, | |
2799 | sd_bus_slot **slot, | |
2800 | sd_bus_message_handler_t callback, | |
2801 | void *userdata) { | |
d9f644e2 | 2802 | |
19befb2d | 2803 | sd_bus_slot *s; |
de1c301e | 2804 | |
d6888822 LP |
2805 | assert_return(bus, -EINVAL); |
2806 | assert_return(callback, -EINVAL); | |
2807 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2808 | |
19befb2d LP |
2809 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2810 | if (!s) | |
29ddb38f LP |
2811 | return -ENOMEM; |
2812 | ||
19befb2d | 2813 | s->filter_callback.callback = callback; |
a652755d | 2814 | |
19befb2d LP |
2815 | bus->filter_callbacks_modified = true; |
2816 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2817 | |
19befb2d LP |
2818 | if (slot) |
2819 | *slot = s; | |
29ddb38f | 2820 | |
992c052c | 2821 | return 0; |
a652755d | 2822 | } |
392d5b37 | 2823 | |
19befb2d LP |
2824 | _public_ int sd_bus_add_match( |
2825 | sd_bus *bus, | |
2826 | sd_bus_slot **slot, | |
2827 | const char *match, | |
2828 | sd_bus_message_handler_t callback, | |
2829 | void *userdata) { | |
d9f644e2 | 2830 | |
992c052c LP |
2831 | struct bus_match_component *components = NULL; |
2832 | unsigned n_components = 0; | |
2915234d | 2833 | sd_bus_slot *s = NULL; |
992c052c | 2834 | int r = 0; |
392d5b37 | 2835 | |
d6888822 LP |
2836 | assert_return(bus, -EINVAL); |
2837 | assert_return(match, -EINVAL); | |
2838 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2839 | |
992c052c LP |
2840 | r = bus_match_parse(match, &components, &n_components); |
2841 | if (r < 0) | |
2842 | goto finish; | |
29ddb38f | 2843 | |
19befb2d LP |
2844 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2845 | if (!s) { | |
2846 | r = -ENOMEM; | |
2847 | goto finish; | |
2848 | } | |
2849 | ||
2850 | s->match_callback.callback = callback; | |
2851 | s->match_callback.cookie = ++bus->match_cookie; | |
2852 | ||
992c052c | 2853 | if (bus->bus_client) { |
29ddb38f | 2854 | |
19befb2d LP |
2855 | if (!bus->is_kernel) { |
2856 | /* When this is not a kernel transport, we | |
2857 | * store the original match string, so that we | |
2858 | * can use it to remove the match again */ | |
2859 | ||
2860 | s->match_callback.match_string = strdup(match); | |
2861 | if (!s->match_callback.match_string) { | |
2862 | r = -ENOMEM; | |
2863 | goto finish; | |
2864 | } | |
2865 | } | |
2866 | ||
2867 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); | |
992c052c LP |
2868 | if (r < 0) |
2869 | goto finish; | |
392d5b37 LP |
2870 | } |
2871 | ||
992c052c | 2872 | bus->match_callbacks_modified = true; |
19befb2d LP |
2873 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2874 | if (r < 0) | |
2875 | goto finish; | |
2876 | ||
2877 | if (slot) | |
2878 | *slot = s; | |
2879 | s = NULL; | |
917b5dc7 | 2880 | |
992c052c LP |
2881 | finish: |
2882 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2883 | sd_bus_slot_unref(s); |
2884 | ||
992c052c | 2885 | return r; |
917b5dc7 LP |
2886 | } |
2887 | ||
19befb2d LP |
2888 | int bus_remove_match_by_string( |
2889 | sd_bus *bus, | |
2890 | const char *match, | |
2891 | sd_bus_message_handler_t callback, | |
2892 | void *userdata) { | |
d9f644e2 | 2893 | |
992c052c LP |
2894 | struct bus_match_component *components = NULL; |
2895 | unsigned n_components = 0; | |
19befb2d LP |
2896 | struct match_callback *c; |
2897 | int r = 0; | |
917b5dc7 | 2898 | |
d6888822 LP |
2899 | assert_return(bus, -EINVAL); |
2900 | assert_return(match, -EINVAL); | |
2901 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2902 | |
992c052c | 2903 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 2904 | if (r < 0) |
19befb2d | 2905 | goto finish; |
f10dda3b | 2906 | |
19befb2d LP |
2907 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
2908 | if (r <= 0) | |
2909 | goto finish; | |
f10dda3b | 2910 | |
19befb2d | 2911 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 2912 | |
19befb2d | 2913 | finish: |
992c052c | 2914 | bus_match_parse_free(components, n_components); |
f10dda3b | 2915 | |
19befb2d | 2916 | return r; |
f10dda3b LP |
2917 | } |
2918 | ||
992c052c LP |
2919 | bool bus_pid_changed(sd_bus *bus) { |
2920 | assert(bus); | |
f10dda3b | 2921 | |
992c052c LP |
2922 | /* We don't support people creating a bus connection and |
2923 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2924 | |
992c052c | 2925 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2926 | } |
40ca29a1 LP |
2927 | |
2928 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2929 | sd_bus *bus = userdata; |
40ca29a1 LP |
2930 | int r; |
2931 | ||
2932 | assert(bus); | |
2933 | ||
2934 | r = sd_bus_process(bus, NULL); | |
2935 | if (r < 0) | |
2936 | return r; | |
2937 | ||
2938 | return 1; | |
2939 | } | |
2940 | ||
2941 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2942 | sd_bus *bus = userdata; |
40ca29a1 LP |
2943 | int r; |
2944 | ||
2945 | assert(bus); | |
2946 | ||
2947 | r = sd_bus_process(bus, NULL); | |
2948 | if (r < 0) | |
2949 | return r; | |
2950 | ||
2951 | return 1; | |
2952 | } | |
2953 | ||
2954 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2955 | sd_bus *bus = userdata; | |
2956 | int r, e; | |
2957 | usec_t until; | |
2958 | ||
2959 | assert(s); | |
2960 | assert(bus); | |
2961 | ||
2962 | e = sd_bus_get_events(bus); | |
2963 | if (e < 0) | |
2964 | return e; | |
2965 | ||
2966 | if (bus->output_fd != bus->input_fd) { | |
2967 | ||
2968 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2969 | if (r < 0) | |
2970 | return r; | |
2971 | ||
2972 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2973 | if (r < 0) | |
2974 | return r; | |
2975 | } else { | |
2976 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2977 | if (r < 0) | |
2978 | return r; | |
2979 | } | |
2980 | ||
2981 | r = sd_bus_get_timeout(bus, &until); | |
2982 | if (r < 0) | |
2983 | return r; | |
2984 | if (r > 0) { | |
2985 | int j; | |
2986 | ||
2987 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2988 | if (j < 0) | |
2989 | return j; | |
2990 | } | |
2991 | ||
2992 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2993 | if (r < 0) | |
2994 | return r; | |
2995 | ||
2996 | return 1; | |
2997 | } | |
2998 | ||
abc5fe72 LP |
2999 | static int quit_callback(sd_event_source *event, void *userdata) { |
3000 | sd_bus *bus = userdata; | |
3001 | ||
3002 | assert(event); | |
3003 | ||
3004 | sd_bus_flush(bus); | |
7bb4d371 | 3005 | sd_bus_close(bus); |
abc5fe72 LP |
3006 | |
3007 | return 1; | |
3008 | } | |
3009 | ||
1e05d493 LP |
3010 | static int attach_io_events(sd_bus *bus) { |
3011 | int r; | |
3012 | ||
3013 | assert(bus); | |
3014 | ||
3015 | if (bus->input_fd < 0) | |
3016 | return 0; | |
3017 | ||
3018 | if (!bus->event) | |
3019 | return 0; | |
3020 | ||
3021 | if (!bus->input_io_event_source) { | |
151b9b96 | 3022 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3023 | if (r < 0) |
3024 | return r; | |
3025 | ||
3026 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3027 | if (r < 0) | |
3028 | return r; | |
3029 | ||
3030 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3031 | if (r < 0) |
3032 | return r; | |
3033 | ||
356779df | 3034 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3035 | } else |
3036 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3037 | ||
3038 | if (r < 0) | |
3039 | return r; | |
3040 | ||
3041 | if (bus->output_fd != bus->input_fd) { | |
3042 | assert(bus->output_fd >= 0); | |
3043 | ||
3044 | if (!bus->output_io_event_source) { | |
151b9b96 | 3045 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3046 | if (r < 0) |
3047 | return r; | |
3048 | ||
3049 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3050 | if (r < 0) |
3051 | return r; | |
3052 | ||
356779df | 3053 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3054 | } else |
3055 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3056 | ||
3057 | if (r < 0) | |
3058 | return r; | |
3059 | } | |
3060 | ||
3061 | return 0; | |
3062 | } | |
3063 | ||
3064 | static void detach_io_events(sd_bus *bus) { | |
3065 | assert(bus); | |
3066 | ||
3067 | if (bus->input_io_event_source) { | |
3068 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3069 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3070 | } | |
3071 | ||
3072 | if (bus->output_io_event_source) { | |
3073 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3074 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3075 | } | |
3076 | } | |
3077 | ||
d9f644e2 | 3078 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3079 | int r; |
3080 | ||
3081 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3082 | assert_return(!bus->event, -EBUSY); |
3083 | ||
3084 | assert(!bus->input_io_event_source); | |
3085 | assert(!bus->output_io_event_source); | |
3086 | assert(!bus->time_event_source); | |
3087 | ||
76b54375 LP |
3088 | if (event) |
3089 | bus->event = sd_event_ref(event); | |
3090 | else { | |
3091 | r = sd_event_default(&bus->event); | |
3092 | if (r < 0) | |
3093 | return r; | |
3094 | } | |
40ca29a1 | 3095 | |
1e05d493 | 3096 | bus->event_priority = priority; |
40ca29a1 | 3097 | |
6a0f1f6d | 3098 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3099 | if (r < 0) |
3100 | goto fail; | |
3101 | ||
3102 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3103 | if (r < 0) | |
3104 | goto fail; | |
3105 | ||
356779df | 3106 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3107 | if (r < 0) |
3108 | goto fail; | |
3109 | ||
151b9b96 | 3110 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3111 | if (r < 0) |
3112 | goto fail; | |
3113 | ||
356779df | 3114 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3115 | if (r < 0) |
3116 | goto fail; | |
3117 | ||
1e05d493 LP |
3118 | r = attach_io_events(bus); |
3119 | if (r < 0) | |
3120 | goto fail; | |
3121 | ||
40ca29a1 LP |
3122 | return 0; |
3123 | ||
3124 | fail: | |
3125 | sd_bus_detach_event(bus); | |
3126 | return r; | |
3127 | } | |
3128 | ||
d9f644e2 | 3129 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3130 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3131 | |
3132 | if (!bus->event) | |
3133 | return 0; | |
40ca29a1 | 3134 | |
1e05d493 | 3135 | detach_io_events(bus); |
40ca29a1 | 3136 | |
86befb40 LP |
3137 | if (bus->time_event_source) { |
3138 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3139 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3140 | } |
40ca29a1 | 3141 | |
86befb40 LP |
3142 | if (bus->quit_event_source) { |
3143 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3144 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3145 | } |
abc5fe72 | 3146 | |
93f1bcf4 | 3147 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3148 | return 1; |
40ca29a1 | 3149 | } |
affff0b6 | 3150 | |
2be44176 LP |
3151 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3152 | assert_return(bus, NULL); | |
3153 | ||
3154 | return bus->event; | |
3155 | } | |
3156 | ||
19befb2d LP |
3157 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3158 | assert_return(bus, NULL); | |
3159 | ||
3160 | return bus->current_message; | |
3161 | } | |
3162 | ||
3163 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3164 | assert_return(bus, NULL); |
3165 | ||
19befb2d | 3166 | return bus->current_slot; |
affff0b6 | 3167 | } |
76b54375 | 3168 | |
caa82984 LP |
3169 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3170 | assert_return(bus, NULL); | |
3171 | ||
3172 | return bus->current_handler; | |
3173 | } | |
3174 | ||
3175 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3176 | assert_return(bus, NULL); | |
3177 | ||
3178 | return bus->current_userdata; | |
3179 | } | |
3180 | ||
76b54375 LP |
3181 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3182 | sd_bus *b = NULL; | |
3183 | int r; | |
3184 | ||
3185 | assert(bus_open); | |
3186 | assert(default_bus); | |
3187 | ||
3188 | if (!ret) | |
3189 | return !!*default_bus; | |
3190 | ||
3191 | if (*default_bus) { | |
3192 | *ret = sd_bus_ref(*default_bus); | |
3193 | return 0; | |
3194 | } | |
3195 | ||
3196 | r = bus_open(&b); | |
3197 | if (r < 0) | |
3198 | return r; | |
3199 | ||
3200 | b->default_bus_ptr = default_bus; | |
3201 | b->tid = gettid(); | |
3202 | *default_bus = b; | |
3203 | ||
3204 | *ret = b; | |
3205 | return 1; | |
3206 | } | |
3207 | ||
3208 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 3209 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
3210 | |
3211 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
3212 | } | |
3213 | ||
3214 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 3215 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
3216 | |
3217 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
3218 | } | |
3219 | ||
af08d2f9 LP |
3220 | _public_ int sd_bus_default(sd_bus **ret) { |
3221 | ||
3222 | const char *e; | |
3223 | ||
3224 | /* Let's try our best to reuse another cached connection. If | |
3225 | * the starter bus type is set, connect via our normal | |
3226 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3227 | * we can share the connection with the user/system default | |
3228 | * bus. */ | |
3229 | ||
3230 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3231 | if (e) { | |
3232 | if (streq(e, "system")) | |
3233 | return sd_bus_default_system(ret); | |
09365592 | 3234 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3235 | return sd_bus_default_user(ret); |
3236 | } | |
3237 | ||
3238 | /* No type is specified, so we have not other option than to | |
3239 | * use the starter address if it is set. */ | |
3240 | ||
3241 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3242 | if (e) { | |
3243 | static thread_local sd_bus *default_starter_bus = NULL; | |
3244 | ||
3245 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3246 | } | |
3247 | ||
3248 | /* Finally, if nothing is set use the cached connection for | |
3249 | * the right scope */ | |
3250 | ||
3251 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3252 | return sd_bus_default_user(ret); | |
3253 | else | |
3254 | return sd_bus_default_system(ret); | |
3255 | } | |
3256 | ||
76b54375 LP |
3257 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3258 | assert_return(b, -EINVAL); | |
3259 | assert_return(tid, -EINVAL); | |
3260 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3261 | ||
3262 | if (b->tid != 0) { | |
3263 | *tid = b->tid; | |
3264 | return 0; | |
3265 | } | |
3266 | ||
3267 | if (b->event) | |
3268 | return sd_event_get_tid(b->event, tid); | |
3269 | ||
3270 | return -ENXIO; | |
3271 | } | |
28383ba1 | 3272 | |
a6278b88 LP |
3273 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3274 | _cleanup_free_ char *e = NULL; | |
3275 | char *ret; | |
3276 | ||
3277 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3278 | assert_return(external_id, -EINVAL); | |
3279 | assert_return(ret_path, -EINVAL); | |
3280 | ||
3281 | e = bus_label_escape(external_id); | |
3282 | if (!e) | |
3283 | return -ENOMEM; | |
3284 | ||
3285 | ret = strjoin(prefix, "/", e, NULL); | |
3286 | if (!ret) | |
3287 | return -ENOMEM; | |
3288 | ||
3289 | *ret_path = ret; | |
3290 | return 0; | |
28383ba1 LP |
3291 | } |
3292 | ||
a6278b88 LP |
3293 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3294 | const char *e; | |
3295 | char *ret; | |
3296 | ||
3297 | assert_return(object_path_is_valid(path), -EINVAL); | |
3298 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3299 | assert_return(external_id, -EINVAL); | |
3300 | ||
3301 | e = object_path_startswith(path, prefix); | |
3302 | if (!e) { | |
3303 | *external_id = NULL; | |
3304 | return 0; | |
3305 | } | |
3306 | ||
3307 | ret = bus_label_unescape(e); | |
3308 | if (!ret) | |
3309 | return -ENOMEM; | |
3310 | ||
3311 | *external_id = ret; | |
3312 | return 1; | |
28383ba1 | 3313 | } |
5b12334d | 3314 | |
ae095f86 LP |
3315 | _public_ int sd_bus_try_close(sd_bus *bus) { |
3316 | int r; | |
3317 | ||
3318 | assert_return(bus, -EINVAL); | |
ae095f86 | 3319 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3320 | |
3321 | if (!bus->is_kernel) | |
3322 | return -ENOTSUP; | |
3323 | ||
3324 | if (!BUS_IS_OPEN(bus->state)) | |
3325 | return -ENOTCONN; | |
ae095f86 | 3326 | |
bd746b8b LP |
3327 | if (bus->rqueue_size > 0) |
3328 | return -EBUSY; | |
3329 | ||
14f862a5 LP |
3330 | if (bus->wqueue_size > 0) |
3331 | return -EBUSY; | |
3332 | ||
ae095f86 LP |
3333 | r = bus_kernel_try_close(bus); |
3334 | if (r < 0) | |
3335 | return r; | |
3336 | ||
3337 | sd_bus_close(bus); | |
3338 | return 0; | |
3339 | } | |
5972fe95 | 3340 | |
455971c1 | 3341 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3342 | assert_return(bus, -EINVAL); |
455971c1 | 3343 | assert_return(description, -EINVAL); |
f4b2933e | 3344 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3345 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3346 | ||
455971c1 | 3347 | *description = bus->description; |
5972fe95 LP |
3348 | return 0; |
3349 | } | |
fe3f22d1 DK |
3350 | |
3351 | int bus_get_root_path(sd_bus *bus) { | |
3352 | int r; | |
3353 | ||
3354 | if (bus->cgroup_root) | |
3355 | return 0; | |
3356 | ||
3357 | r = cg_get_root_path(&bus->cgroup_root); | |
3358 | if (r == -ENOENT) { | |
3359 | bus->cgroup_root = strdup("/"); | |
3360 | if (!bus->cgroup_root) | |
3361 | return -ENOMEM; | |
3362 | ||
3363 | r = 0; | |
3364 | } | |
3365 | ||
3366 | return r; | |
3367 | } |