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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); |
5972fe95 | 132 | free(b->connection_name); |
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 LP |
141 | |
142 | hashmap_free_free(b->reply_callbacks); | |
e3017af9 | 143 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 144 | |
392d5b37 LP |
145 | bus_match_free(&b->match_callbacks); |
146 | ||
29ddb38f LP |
147 | hashmap_free_free(b->vtable_methods); |
148 | hashmap_free_free(b->vtable_properties); | |
149 | ||
19befb2d | 150 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
151 | hashmap_free(b->nodes); |
152 | ||
bc7fd8cd LP |
153 | bus_kernel_flush_memfd(b); |
154 | ||
45fbe937 LP |
155 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
156 | ||
de1c301e LP |
157 | free(b); |
158 | } | |
159 | ||
d9f644e2 | 160 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
161 | sd_bus *r; |
162 | ||
d6888822 | 163 | assert_return(ret, -EINVAL); |
021a1e78 | 164 | |
de1c301e LP |
165 | r = new0(sd_bus, 1); |
166 | if (!r) | |
021a1e78 | 167 | return -ENOMEM; |
de1c301e | 168 | |
e4ee6e5c | 169 | r->n_ref = REFCNT_INIT; |
e82c9509 | 170 | r->input_fd = r->output_fd = -1; |
de1c301e | 171 | r->message_version = 1; |
3310dfd5 | 172 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
d21a7bb1 DM |
173 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
174 | r->attach_flags |= KDBUS_ATTACH_NAMES; | |
d5a2b9a6 | 175 | r->original_pid = getpid(); |
de1c301e | 176 | |
45fbe937 LP |
177 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
178 | ||
de1c301e LP |
179 | /* We guarantee that wqueue always has space for at least one |
180 | * entry */ | |
821e0756 | 181 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 182 | free(r); |
021a1e78 | 183 | return -ENOMEM; |
de1c301e LP |
184 | } |
185 | ||
021a1e78 LP |
186 | *ret = r; |
187 | return 0; | |
188 | } | |
189 | ||
d9f644e2 | 190 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
191 | char *a; |
192 | ||
d6888822 LP |
193 | assert_return(bus, -EINVAL); |
194 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
195 | assert_return(address, -EINVAL); | |
196 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
197 | |
198 | a = strdup(address); | |
199 | if (!a) | |
200 | return -ENOMEM; | |
201 | ||
202 | free(bus->address); | |
203 | bus->address = a; | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
d9f644e2 | 208 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
209 | assert_return(bus, -EINVAL); |
210 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
211 | assert_return(input_fd >= 0, -EINVAL); | |
212 | assert_return(output_fd >= 0, -EINVAL); | |
213 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 214 | |
e82c9509 LP |
215 | bus->input_fd = input_fd; |
216 | bus->output_fd = output_fd; | |
021a1e78 LP |
217 | return 0; |
218 | } | |
219 | ||
d9f644e2 | 220 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
221 | char *p, **a; |
222 | ||
d6888822 LP |
223 | assert_return(bus, -EINVAL); |
224 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
225 | assert_return(path, -EINVAL); | |
226 | assert_return(!strv_isempty(argv), -EINVAL); | |
227 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
228 | |
229 | p = strdup(path); | |
230 | if (!p) | |
231 | return -ENOMEM; | |
232 | ||
233 | a = strv_copy(argv); | |
234 | if (!a) { | |
235 | free(p); | |
236 | return -ENOMEM; | |
237 | } | |
238 | ||
239 | free(bus->exec_path); | |
240 | strv_free(bus->exec_argv); | |
241 | ||
242 | bus->exec_path = p; | |
243 | bus->exec_argv = a; | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
d9f644e2 | 248 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
249 | assert_return(bus, -EINVAL); |
250 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
251 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 252 | |
94bbf1ba | 253 | bus->bus_client = !!b; |
021a1e78 LP |
254 | return 0; |
255 | } | |
256 | ||
09365592 LP |
257 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
258 | assert_return(bus, -EINVAL); | |
259 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
260 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
261 | ||
262 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
263 | return 0; | |
264 | } | |
265 | ||
d9f644e2 | 266 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
267 | assert_return(bus, -EINVAL); |
268 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
269 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 270 | |
264ad849 LP |
271 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
272 | return 0; | |
273 | } | |
274 | ||
4fc31988 | 275 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
16be4368 KS |
276 | assert_return(bus, -EINVAL); |
277 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
278 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
279 | ||
d21a7bb1 | 280 | SET_FLAG(bus->attach_flags, KDBUS_ATTACH_TIMESTAMP, b); |
16be4368 KS |
281 | return 0; |
282 | } | |
283 | ||
4fc31988 | 284 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, uint64_t mask) { |
16be4368 | 285 | assert_return(bus, -EINVAL); |
95c4fe82 | 286 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
16be4368 KS |
287 | assert_return(bus->state == BUS_UNSET, -EPERM); |
288 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
289 | ||
49b832c5 | 290 | /* The well knowns we need unconditionally, so that matches can work */ |
3310dfd5 | 291 | bus->creds_mask = mask | SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
49b832c5 | 292 | |
ae439c9f | 293 | return kdbus_translate_attach_flags(bus->creds_mask, &bus->attach_flags); |
021a1e78 | 294 | } |
de1c301e | 295 | |
d9f644e2 | 296 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
297 | assert_return(bus, -EINVAL); |
298 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
299 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
300 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
301 | |
302 | bus->is_server = !!b; | |
98178d39 | 303 | bus->server_id = server_id; |
2181a7f5 LP |
304 | return 0; |
305 | } | |
306 | ||
d9f644e2 | 307 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
308 | assert_return(bus, -EINVAL); |
309 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
310 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
311 | |
312 | bus->anonymous_auth = !!b; | |
313 | return 0; | |
314 | } | |
315 | ||
adacb957 LP |
316 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
317 | assert_return(bus, -EINVAL); | |
318 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
319 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
320 | ||
321 | bus->trusted = !!b; | |
322 | return 0; | |
323 | } | |
324 | ||
5972fe95 LP |
325 | _public_ int sd_bus_set_name(sd_bus *bus, const char *name) { |
326 | char *n; | |
327 | ||
328 | assert_return(bus, -EINVAL); | |
329 | assert_return(name, -EINVAL); | |
330 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
331 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
332 | ||
333 | n = strdup(name); | |
334 | if (!n) | |
335 | return -ENOMEM; | |
336 | ||
337 | free(bus->connection_name); | |
338 | bus->connection_name = n; | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
ebcf1f97 | 343 | static int hello_callback(sd_bus *bus, sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e LP |
344 | const char *s; |
345 | int r; | |
346 | ||
347 | assert(bus); | |
c99c09a2 | 348 | assert(bus->state == BUS_HELLO || bus->state == BUS_CLOSING); |
de1c301e LP |
349 | assert(reply); |
350 | ||
40ca29a1 | 351 | r = sd_bus_message_get_errno(reply); |
eb01ba5d LP |
352 | if (r < 0) |
353 | return r; | |
40ca29a1 LP |
354 | if (r > 0) |
355 | return -r; | |
eb01ba5d | 356 | |
de1c301e LP |
357 | r = sd_bus_message_read(reply, "s", &s); |
358 | if (r < 0) | |
359 | return r; | |
360 | ||
dafb7591 LP |
361 | if (!service_name_is_valid(s) || s[0] != ':') |
362 | return -EBADMSG; | |
363 | ||
de1c301e LP |
364 | bus->unique_name = strdup(s); |
365 | if (!bus->unique_name) | |
366 | return -ENOMEM; | |
367 | ||
c99c09a2 LP |
368 | if (bus->state == BUS_HELLO) |
369 | bus->state = BUS_RUNNING; | |
dafb7591 | 370 | |
de1c301e LP |
371 | return 1; |
372 | } | |
373 | ||
374 | static int bus_send_hello(sd_bus *bus) { | |
375 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
376 | int r; | |
377 | ||
378 | assert(bus); | |
379 | ||
6629161f | 380 | if (!bus->bus_client || bus->is_kernel) |
021a1e78 LP |
381 | return 0; |
382 | ||
de1c301e LP |
383 | r = sd_bus_message_new_method_call( |
384 | bus, | |
151b9b96 | 385 | &m, |
de1c301e | 386 | "org.freedesktop.DBus", |
a7639e37 | 387 | "/org/freedesktop/DBus", |
de1c301e | 388 | "org.freedesktop.DBus", |
151b9b96 | 389 | "Hello"); |
de1c301e LP |
390 | if (r < 0) |
391 | return r; | |
392 | ||
19befb2d | 393 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
394 | } |
395 | ||
a7e3212d | 396 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
397 | assert(bus); |
398 | ||
f08838da | 399 | if (bus->bus_client && !bus->is_kernel) { |
de1c301e | 400 | bus->state = BUS_HELLO; |
e3017af9 | 401 | return 1; |
de1c301e LP |
402 | } |
403 | ||
404 | bus->state = BUS_RUNNING; | |
e3017af9 | 405 | return 1; |
de1c301e LP |
406 | } |
407 | ||
408 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 409 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
410 | const char *a; |
411 | char *r = NULL; | |
412 | ||
413 | assert(p); | |
414 | assert(*p); | |
de1c301e LP |
415 | assert(value); |
416 | ||
2fd9ae2e LP |
417 | if (key) { |
418 | l = strlen(key); | |
419 | if (strncmp(*p, key, l) != 0) | |
420 | return 0; | |
de1c301e | 421 | |
2fd9ae2e LP |
422 | if ((*p)[l] != '=') |
423 | return 0; | |
de1c301e | 424 | |
2fd9ae2e LP |
425 | if (*value) |
426 | return -EINVAL; | |
de1c301e | 427 | |
2fd9ae2e LP |
428 | a = *p + l + 1; |
429 | } else | |
430 | a = *p; | |
431 | ||
432 | while (*a != ';' && *a != ',' && *a != 0) { | |
821e0756 | 433 | char c; |
de1c301e LP |
434 | |
435 | if (*a == '%') { | |
436 | int x, y; | |
437 | ||
438 | x = unhexchar(a[1]); | |
439 | if (x < 0) { | |
440 | free(r); | |
441 | return x; | |
442 | } | |
443 | ||
444 | y = unhexchar(a[2]); | |
445 | if (y < 0) { | |
446 | free(r); | |
447 | return y; | |
448 | } | |
449 | ||
de1c301e | 450 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
451 | a += 3; |
452 | } else { | |
de1c301e | 453 | c = *a; |
89ffcd2a LP |
454 | a++; |
455 | } | |
de1c301e | 456 | |
821e0756 | 457 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 458 | return -ENOMEM; |
de1c301e | 459 | |
de1c301e LP |
460 | r[n++] = c; |
461 | } | |
462 | ||
89ffcd2a LP |
463 | if (!r) { |
464 | r = strdup(""); | |
465 | if (!r) | |
466 | return -ENOMEM; | |
467 | } else | |
468 | r[n] = 0; | |
469 | ||
470 | if (*a == ',') | |
471 | a++; | |
472 | ||
de1c301e | 473 | *p = a; |
2fd9ae2e LP |
474 | |
475 | free(*value); | |
de1c301e | 476 | *value = r; |
2fd9ae2e | 477 | |
de1c301e LP |
478 | return 1; |
479 | } | |
480 | ||
481 | static void skip_address_key(const char **p) { | |
482 | assert(p); | |
483 | assert(*p); | |
484 | ||
89ffcd2a LP |
485 | *p += strcspn(*p, ","); |
486 | ||
487 | if (**p == ',') | |
488 | (*p) ++; | |
de1c301e LP |
489 | } |
490 | ||
2fd9ae2e LP |
491 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
492 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
493 | size_t l; | |
de1c301e LP |
494 | int r; |
495 | ||
496 | assert(b); | |
2fd9ae2e LP |
497 | assert(p); |
498 | assert(*p); | |
499 | assert(guid); | |
de1c301e | 500 | |
2fd9ae2e LP |
501 | while (**p != 0 && **p != ';') { |
502 | r = parse_address_key(p, "guid", guid); | |
503 | if (r < 0) | |
504 | return r; | |
505 | else if (r > 0) | |
506 | continue; | |
de1c301e | 507 | |
2fd9ae2e LP |
508 | r = parse_address_key(p, "path", &path); |
509 | if (r < 0) | |
510 | return r; | |
511 | else if (r > 0) | |
512 | continue; | |
de1c301e | 513 | |
2fd9ae2e LP |
514 | r = parse_address_key(p, "abstract", &abstract); |
515 | if (r < 0) | |
516 | return r; | |
517 | else if (r > 0) | |
518 | continue; | |
de1c301e | 519 | |
2fd9ae2e LP |
520 | skip_address_key(p); |
521 | } | |
de1c301e | 522 | |
2fd9ae2e LP |
523 | if (!path && !abstract) |
524 | return -EINVAL; | |
de1c301e | 525 | |
2fd9ae2e LP |
526 | if (path && abstract) |
527 | return -EINVAL; | |
528 | ||
529 | if (path) { | |
530 | l = strlen(path); | |
531 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
532 | return -E2BIG; | |
de1c301e | 533 | |
2fd9ae2e LP |
534 | b->sockaddr.un.sun_family = AF_UNIX; |
535 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
536 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
537 | } else if (abstract) { | |
538 | l = strlen(abstract); | |
539 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
540 | return -E2BIG; | |
541 | ||
542 | b->sockaddr.un.sun_family = AF_UNIX; | |
543 | b->sockaddr.un.sun_path[0] = 0; | |
544 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
545 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
546 | } | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
552 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 553 | int r; |
b92bea5d ZJS |
554 | struct addrinfo *result, hints = { |
555 | .ai_socktype = SOCK_STREAM, | |
556 | .ai_flags = AI_ADDRCONFIG, | |
557 | }; | |
2fd9ae2e LP |
558 | |
559 | assert(b); | |
560 | assert(p); | |
561 | assert(*p); | |
562 | assert(guid); | |
563 | ||
564 | while (**p != 0 && **p != ';') { | |
565 | r = parse_address_key(p, "guid", guid); | |
566 | if (r < 0) | |
567 | return r; | |
568 | else if (r > 0) | |
569 | continue; | |
570 | ||
571 | r = parse_address_key(p, "host", &host); | |
572 | if (r < 0) | |
573 | return r; | |
574 | else if (r > 0) | |
575 | continue; | |
576 | ||
577 | r = parse_address_key(p, "port", &port); | |
578 | if (r < 0) | |
579 | return r; | |
580 | else if (r > 0) | |
581 | continue; | |
582 | ||
583 | r = parse_address_key(p, "family", &family); | |
584 | if (r < 0) | |
585 | return r; | |
586 | else if (r > 0) | |
587 | continue; | |
588 | ||
589 | skip_address_key(p); | |
590 | } | |
591 | ||
592 | if (!host || !port) | |
593 | return -EINVAL; | |
594 | ||
2fd9ae2e LP |
595 | if (family) { |
596 | if (streq(family, "ipv4")) | |
597 | hints.ai_family = AF_INET; | |
598 | else if (streq(family, "ipv6")) | |
599 | hints.ai_family = AF_INET6; | |
600 | else | |
601 | return -EINVAL; | |
602 | } | |
603 | ||
604 | r = getaddrinfo(host, port, &hints, &result); | |
605 | if (r == EAI_SYSTEM) | |
606 | return -errno; | |
607 | else if (r != 0) | |
608 | return -EADDRNOTAVAIL; | |
609 | ||
610 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
611 | b->sockaddr_size = result->ai_addrlen; | |
612 | ||
613 | freeaddrinfo(result); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
619 | char *path = NULL; | |
620 | unsigned n_argv = 0, j; | |
621 | char **argv = NULL; | |
821e0756 | 622 | size_t allocated = 0; |
2fd9ae2e LP |
623 | int r; |
624 | ||
625 | assert(b); | |
626 | assert(p); | |
627 | assert(*p); | |
628 | assert(guid); | |
629 | ||
630 | while (**p != 0 && **p != ';') { | |
631 | r = parse_address_key(p, "guid", guid); | |
632 | if (r < 0) | |
633 | goto fail; | |
634 | else if (r > 0) | |
635 | continue; | |
636 | ||
637 | r = parse_address_key(p, "path", &path); | |
638 | if (r < 0) | |
639 | goto fail; | |
640 | else if (r > 0) | |
641 | continue; | |
642 | ||
643 | if (startswith(*p, "argv")) { | |
644 | unsigned ul; | |
645 | ||
646 | errno = 0; | |
647 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 648 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
649 | r = -EINVAL; |
650 | goto fail; | |
651 | } | |
652 | ||
653 | (*p) ++; | |
654 | ||
655 | if (ul >= n_argv) { | |
821e0756 | 656 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
657 | r = -ENOMEM; |
658 | goto fail; | |
659 | } | |
660 | ||
2fd9ae2e LP |
661 | n_argv = ul + 1; |
662 | } | |
663 | ||
664 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 665 | if (r < 0) |
2fd9ae2e | 666 | goto fail; |
de1c301e | 667 | |
2fd9ae2e | 668 | continue; |
de1c301e LP |
669 | } |
670 | ||
2fd9ae2e LP |
671 | skip_address_key(p); |
672 | } | |
de1c301e | 673 | |
5a0f6033 LP |
674 | if (!path) { |
675 | r = -EINVAL; | |
2fd9ae2e | 676 | goto fail; |
5a0f6033 | 677 | } |
de1c301e | 678 | |
2fd9ae2e LP |
679 | /* Make sure there are no holes in the array, with the |
680 | * exception of argv[0] */ | |
681 | for (j = 1; j < n_argv; j++) | |
682 | if (!argv[j]) { | |
683 | r = -EINVAL; | |
684 | goto fail; | |
685 | } | |
686 | ||
687 | if (argv && argv[0] == NULL) { | |
688 | argv[0] = strdup(path); | |
689 | if (!argv[0]) { | |
690 | r = -ENOMEM; | |
691 | goto fail; | |
692 | } | |
693 | } | |
de1c301e | 694 | |
2fd9ae2e LP |
695 | b->exec_path = path; |
696 | b->exec_argv = argv; | |
697 | return 0; | |
de1c301e | 698 | |
2fd9ae2e LP |
699 | fail: |
700 | for (j = 0; j < n_argv; j++) | |
701 | free(argv[j]); | |
702 | ||
703 | free(argv); | |
704 | free(path); | |
705 | return r; | |
706 | } | |
707 | ||
6629161f LP |
708 | static int parse_kernel_address(sd_bus *b, const char **p, char **guid) { |
709 | _cleanup_free_ char *path = NULL; | |
710 | int r; | |
711 | ||
712 | assert(b); | |
713 | assert(p); | |
714 | assert(*p); | |
715 | assert(guid); | |
716 | ||
717 | while (**p != 0 && **p != ';') { | |
718 | r = parse_address_key(p, "guid", guid); | |
719 | if (r < 0) | |
720 | return r; | |
721 | else if (r > 0) | |
722 | continue; | |
723 | ||
724 | r = parse_address_key(p, "path", &path); | |
725 | if (r < 0) | |
726 | return r; | |
727 | else if (r > 0) | |
728 | continue; | |
729 | ||
730 | skip_address_key(p); | |
731 | } | |
732 | ||
733 | if (!path) | |
734 | return -EINVAL; | |
735 | ||
736 | free(b->kernel); | |
737 | b->kernel = path; | |
738 | path = NULL; | |
739 | ||
740 | return 0; | |
741 | } | |
742 | ||
bc9fd78c | 743 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
a7893c6b LP |
744 | _cleanup_free_ char *machine = NULL; |
745 | int r; | |
746 | ||
747 | assert(b); | |
748 | assert(p); | |
749 | assert(*p); | |
750 | assert(guid); | |
751 | ||
752 | while (**p != 0 && **p != ';') { | |
753 | r = parse_address_key(p, "guid", guid); | |
754 | if (r < 0) | |
755 | return r; | |
756 | else if (r > 0) | |
757 | continue; | |
758 | ||
759 | r = parse_address_key(p, "machine", &machine); | |
760 | if (r < 0) | |
761 | return r; | |
762 | else if (r > 0) | |
763 | continue; | |
764 | ||
765 | skip_address_key(p); | |
766 | } | |
767 | ||
768 | if (!machine) | |
769 | return -EINVAL; | |
770 | ||
b6741478 LP |
771 | if (!filename_is_safe(machine)) |
772 | return -EINVAL; | |
773 | ||
a7893c6b LP |
774 | free(b->machine); |
775 | b->machine = machine; | |
776 | machine = NULL; | |
777 | ||
778 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 LP |
779 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
780 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + strlen("/var/run/dbus/system_bus_socket"); | |
a7893c6b LP |
781 | |
782 | return 0; | |
783 | } | |
784 | ||
bc9fd78c LP |
785 | static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid) { |
786 | _cleanup_free_ char *machine = NULL; | |
787 | int r; | |
788 | ||
789 | assert(b); | |
790 | assert(p); | |
791 | assert(*p); | |
792 | assert(guid); | |
793 | ||
794 | while (**p != 0 && **p != ';') { | |
795 | r = parse_address_key(p, "guid", guid); | |
796 | if (r < 0) | |
797 | return r; | |
798 | else if (r > 0) | |
799 | continue; | |
800 | ||
801 | r = parse_address_key(p, "machine", &machine); | |
802 | if (r < 0) | |
803 | return r; | |
804 | else if (r > 0) | |
805 | continue; | |
806 | ||
807 | skip_address_key(p); | |
808 | } | |
809 | ||
810 | if (!machine) | |
811 | return -EINVAL; | |
812 | ||
813 | if (!filename_is_safe(machine)) | |
814 | return -EINVAL; | |
815 | ||
816 | free(b->machine); | |
817 | b->machine = machine; | |
818 | machine = NULL; | |
819 | ||
820 | free(b->kernel); | |
821 | b->kernel = strdup("/dev/kdbus/0-system/bus"); | |
822 | if (!b->kernel) | |
823 | return -ENOMEM; | |
824 | ||
825 | return 0; | |
826 | } | |
827 | ||
2fd9ae2e LP |
828 | static void bus_reset_parsed_address(sd_bus *b) { |
829 | assert(b); | |
830 | ||
831 | zero(b->sockaddr); | |
832 | b->sockaddr_size = 0; | |
833 | strv_free(b->exec_argv); | |
834 | free(b->exec_path); | |
835 | b->exec_path = NULL; | |
836 | b->exec_argv = NULL; | |
98178d39 | 837 | b->server_id = SD_ID128_NULL; |
6629161f LP |
838 | free(b->kernel); |
839 | b->kernel = NULL; | |
a7893c6b LP |
840 | free(b->machine); |
841 | b->machine = NULL; | |
2fd9ae2e LP |
842 | } |
843 | ||
844 | static int bus_parse_next_address(sd_bus *b) { | |
845 | _cleanup_free_ char *guid = NULL; | |
846 | const char *a; | |
847 | int r; | |
848 | ||
849 | assert(b); | |
850 | ||
851 | if (!b->address) | |
852 | return 0; | |
853 | if (b->address[b->address_index] == 0) | |
854 | return 0; | |
855 | ||
856 | bus_reset_parsed_address(b); | |
857 | ||
858 | a = b->address + b->address_index; | |
de1c301e | 859 | |
2fd9ae2e | 860 | while (*a != 0) { |
de1c301e | 861 | |
2fd9ae2e LP |
862 | if (*a == ';') { |
863 | a++; | |
864 | continue; | |
de1c301e LP |
865 | } |
866 | ||
2fd9ae2e LP |
867 | if (startswith(a, "unix:")) { |
868 | a += 5; | |
de1c301e | 869 | |
2fd9ae2e | 870 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
871 | if (r < 0) |
872 | return r; | |
2fd9ae2e | 873 | break; |
de1c301e | 874 | |
2fd9ae2e | 875 | } else if (startswith(a, "tcp:")) { |
de1c301e | 876 | |
2fd9ae2e LP |
877 | a += 4; |
878 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
879 | if (r < 0) |
880 | return r; | |
de1c301e | 881 | |
2fd9ae2e LP |
882 | break; |
883 | ||
884 | } else if (startswith(a, "unixexec:")) { | |
885 | ||
886 | a += 9; | |
887 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
888 | if (r < 0) |
889 | return r; | |
de1c301e | 890 | |
2fd9ae2e | 891 | break; |
de1c301e | 892 | |
6629161f LP |
893 | } else if (startswith(a, "kernel:")) { |
894 | ||
895 | a += 7; | |
896 | r = parse_kernel_address(b, &a, &guid); | |
897 | if (r < 0) | |
898 | return r; | |
899 | ||
a7893c6b | 900 | break; |
bc9fd78c LP |
901 | } else if (startswith(a, "x-container-unix:")) { |
902 | ||
903 | a += 17; | |
904 | r = parse_container_unix_address(b, &a, &guid); | |
905 | if (r < 0) | |
906 | return r; | |
907 | ||
908 | break; | |
909 | } else if (startswith(a, "x-container-kernel:")) { | |
a7893c6b | 910 | |
bc9fd78c LP |
911 | a += 19; |
912 | r = parse_container_kernel_address(b, &a, &guid); | |
a7893c6b LP |
913 | if (r < 0) |
914 | return r; | |
915 | ||
6629161f | 916 | break; |
de1c301e LP |
917 | } |
918 | ||
2fd9ae2e LP |
919 | a = strchr(a, ';'); |
920 | if (!a) | |
921 | return 0; | |
de1c301e LP |
922 | } |
923 | ||
924 | if (guid) { | |
98178d39 | 925 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
926 | if (r < 0) |
927 | return r; | |
928 | } | |
929 | ||
2fd9ae2e | 930 | b->address_index = a - b->address; |
de1c301e LP |
931 | return 1; |
932 | } | |
933 | ||
a7e3212d | 934 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
935 | int r; |
936 | ||
937 | assert(b); | |
938 | ||
939 | for (;;) { | |
1e05d493 | 940 | bool skipped = false; |
2fd9ae2e | 941 | |
1e05d493 | 942 | bus_close_fds(b); |
a7e3212d | 943 | |
1e05d493 | 944 | if (b->exec_path) |
a7893c6b | 945 | r = bus_socket_exec(b); |
bc9fd78c LP |
946 | else if (b->machine && b->kernel) |
947 | r = bus_container_connect_kernel(b); | |
948 | else if (b->machine && b->sockaddr.sa.sa_family != AF_UNSPEC) | |
949 | r = bus_container_connect_socket(b); | |
1e05d493 | 950 | else if (b->kernel) |
a7893c6b | 951 | r = bus_kernel_connect(b); |
1e05d493 | 952 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
a7893c6b | 953 | r = bus_socket_connect(b); |
1e05d493 LP |
954 | else |
955 | skipped = true; | |
956 | ||
957 | if (!skipped) { | |
958 | if (r >= 0) { | |
959 | r = attach_io_events(b); | |
960 | if (r >= 0) | |
961 | return r; | |
962 | } | |
6629161f | 963 | |
2fd9ae2e LP |
964 | b->last_connect_error = -r; |
965 | } | |
966 | ||
967 | r = bus_parse_next_address(b); | |
968 | if (r < 0) | |
969 | return r; | |
970 | if (r == 0) | |
971 | return b->last_connect_error ? -b->last_connect_error : -ECONNREFUSED; | |
de1c301e LP |
972 | } |
973 | } | |
974 | ||
a7e3212d LP |
975 | int bus_next_address(sd_bus *b) { |
976 | assert(b); | |
977 | ||
978 | bus_reset_parsed_address(b); | |
979 | return bus_start_address(b); | |
980 | } | |
981 | ||
021a1e78 | 982 | static int bus_start_fd(sd_bus *b) { |
6629161f | 983 | struct stat st; |
021a1e78 LP |
984 | int r; |
985 | ||
986 | assert(b); | |
e82c9509 LP |
987 | assert(b->input_fd >= 0); |
988 | assert(b->output_fd >= 0); | |
021a1e78 | 989 | |
e82c9509 | 990 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
991 | if (r < 0) |
992 | return r; | |
993 | ||
e82c9509 | 994 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
995 | if (r < 0) |
996 | return r; | |
997 | ||
e82c9509 LP |
998 | if (b->input_fd != b->output_fd) { |
999 | r = fd_nonblock(b->output_fd, true); | |
1000 | if (r < 0) | |
1001 | return r; | |
1002 | ||
1003 | r = fd_cloexec(b->output_fd, true); | |
1004 | if (r < 0) | |
1005 | return r; | |
1006 | } | |
1007 | ||
6629161f LP |
1008 | if (fstat(b->input_fd, &st) < 0) |
1009 | return -errno; | |
1010 | ||
1011 | if (S_ISCHR(b->input_fd)) | |
1012 | return bus_kernel_take_fd(b); | |
1013 | else | |
1014 | return bus_socket_take_fd(b); | |
021a1e78 LP |
1015 | } |
1016 | ||
d9f644e2 | 1017 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1018 | int r; |
1019 | ||
d6888822 LP |
1020 | assert_return(bus, -EINVAL); |
1021 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
1022 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
1023 | |
1024 | bus->state = BUS_OPENING; | |
1025 | ||
2181a7f5 LP |
1026 | if (bus->is_server && bus->bus_client) |
1027 | return -EINVAL; | |
1028 | ||
e82c9509 | 1029 | if (bus->input_fd >= 0) |
021a1e78 | 1030 | r = bus_start_fd(bus); |
a7893c6b | 1031 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->kernel || bus->machine) |
a7e3212d | 1032 | r = bus_start_address(bus); |
021a1e78 LP |
1033 | else |
1034 | return -EINVAL; | |
1035 | ||
db9bb83f LP |
1036 | if (r < 0) { |
1037 | sd_bus_close(bus); | |
021a1e78 | 1038 | return r; |
db9bb83f | 1039 | } |
021a1e78 LP |
1040 | |
1041 | return bus_send_hello(bus); | |
1042 | } | |
1043 | ||
af08d2f9 LP |
1044 | _public_ int sd_bus_open(sd_bus **ret) { |
1045 | const char *e; | |
1046 | sd_bus *b; | |
1047 | int r; | |
1048 | ||
1049 | assert_return(ret, -EINVAL); | |
1050 | ||
1051 | /* Let's connect to the starter bus if it is set, and | |
1052 | * otherwise to the bus that is appropropriate for the scope | |
1053 | * we are running in */ | |
1054 | ||
1055 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1056 | if (e) { | |
1057 | if (streq(e, "system")) | |
1058 | return sd_bus_open_system(ret); | |
09365592 | 1059 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1060 | return sd_bus_open_user(ret); |
1061 | } | |
1062 | ||
1063 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1064 | if (!e) { | |
1065 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1066 | return sd_bus_open_user(ret); | |
1067 | else | |
1068 | return sd_bus_open_system(ret); | |
1069 | } | |
1070 | ||
1071 | r = sd_bus_new(&b); | |
1072 | if (r < 0) | |
1073 | return r; | |
1074 | ||
1075 | r = sd_bus_set_address(b, e); | |
1076 | if (r < 0) | |
1077 | goto fail; | |
1078 | ||
1079 | b->bus_client = true; | |
1080 | ||
1081 | /* We don't know whether the bus is trusted or not, so better | |
1082 | * be safe, and authenticate everything */ | |
1083 | b->trusted = false; | |
1084 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1085 | ||
1086 | r = sd_bus_start(b); | |
1087 | if (r < 0) | |
1088 | goto fail; | |
1089 | ||
1090 | *ret = b; | |
1091 | return 0; | |
1092 | ||
1093 | fail: | |
1094 | bus_free(b); | |
1095 | return r; | |
1096 | } | |
1097 | ||
09365592 | 1098 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1099 | const char *e; |
09365592 LP |
1100 | assert(b); |
1101 | ||
1102 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1103 | if (e) | |
1104 | return sd_bus_set_address(b, e); | |
1105 | ||
1106 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_PATH); | |
1107 | } | |
1108 | ||
1109 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1110 | sd_bus *b; |
1111 | int r; | |
1112 | ||
d6888822 | 1113 | assert_return(ret, -EINVAL); |
de1c301e | 1114 | |
021a1e78 LP |
1115 | r = sd_bus_new(&b); |
1116 | if (r < 0) | |
1117 | return r; | |
1118 | ||
09365592 | 1119 | r = bus_set_address_system(b); |
e3dd987c LP |
1120 | if (r < 0) |
1121 | goto fail; | |
de1c301e | 1122 | |
94bbf1ba | 1123 | b->bus_client = true; |
5972fe95 | 1124 | b->is_system = true; |
021a1e78 | 1125 | |
adacb957 LP |
1126 | /* Let's do per-method access control on the system bus. We |
1127 | * need the caller's UID and capability set for that. */ | |
1128 | b->trusted = false; | |
1129 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
1130 | ||
021a1e78 LP |
1131 | r = sd_bus_start(b); |
1132 | if (r < 0) | |
1133 | goto fail; | |
de1c301e LP |
1134 | |
1135 | *ret = b; | |
1136 | return 0; | |
021a1e78 LP |
1137 | |
1138 | fail: | |
1139 | bus_free(b); | |
1140 | return r; | |
de1c301e LP |
1141 | } |
1142 | ||
09365592 | 1143 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1144 | const char *e; |
de1c301e | 1145 | |
09365592 | 1146 | assert(b); |
021a1e78 | 1147 | |
6c03089c | 1148 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1149 | if (e) |
1150 | return sd_bus_set_address(b, e); | |
1151 | ||
1152 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
de1c301e | 1153 | if (e) { |
09365592 | 1154 | _cleanup_free_ char *ee = NULL; |
e3dd987c | 1155 | |
09365592 LP |
1156 | ee = bus_address_escape(e); |
1157 | if (!ee) | |
1158 | return -ENOMEM; | |
e3dd987c | 1159 | |
626851be | 1160 | #ifdef ENABLE_KDBUS |
de0671ee | 1161 | asprintf(&b->address, KERNEL_USER_BUS_FMT ";" UNIX_USER_BUS_FMT, getuid(), ee); |
626851be | 1162 | #else |
09365592 | 1163 | asprintf(&b->address, UNIX_USER_BUS_FMT, ee); |
626851be | 1164 | #endif |
09365592 | 1165 | } else { |
626851be | 1166 | #ifdef ENABLE_KDBUS |
de0671ee | 1167 | asprintf(&b->address, KERNEL_USER_BUS_FMT, getuid()); |
626851be | 1168 | #else |
09365592 | 1169 | return -ECONNREFUSED; |
626851be | 1170 | #endif |
de1c301e LP |
1171 | } |
1172 | ||
09365592 LP |
1173 | if (!b->address) |
1174 | return -ENOMEM; | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1180 | sd_bus *b; | |
1181 | int r; | |
1182 | ||
1183 | assert_return(ret, -EINVAL); | |
1184 | ||
1185 | r = sd_bus_new(&b); | |
1186 | if (r < 0) | |
1187 | return r; | |
1188 | ||
1189 | r = bus_set_address_user(b); | |
1190 | if (r < 0) | |
1191 | return r; | |
1192 | ||
94bbf1ba | 1193 | b->bus_client = true; |
5972fe95 | 1194 | b->is_user = true; |
de1c301e | 1195 | |
adacb957 LP |
1196 | /* We don't do any per-method access control on the user |
1197 | * bus. */ | |
1198 | b->trusted = true; | |
1199 | ||
021a1e78 | 1200 | r = sd_bus_start(b); |
2571ead1 LP |
1201 | if (r < 0) |
1202 | goto fail; | |
de1c301e LP |
1203 | |
1204 | *ret = b; | |
1205 | return 0; | |
2571ead1 LP |
1206 | |
1207 | fail: | |
021a1e78 | 1208 | bus_free(b); |
2571ead1 | 1209 | return r; |
de1c301e LP |
1210 | } |
1211 | ||
09365592 | 1212 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1213 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1214 | char *m = NULL, *c = NULL; |
0f8bd8de | 1215 | |
09365592 LP |
1216 | assert(b); |
1217 | assert(host); | |
0f8bd8de | 1218 | |
7f0d207d LP |
1219 | /* Let's see if we shall enter some container */ |
1220 | m = strchr(host, ':'); | |
1221 | if (m) { | |
1222 | m++; | |
1223 | ||
1224 | /* Let's make sure this is not a port of some kind, | |
1225 | * and is a valid machine name. */ | |
1226 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1227 | char *t; | |
1228 | ||
1229 | /* Cut out the host part */ | |
1230 | t = strndupa(host, m - host - 1); | |
1231 | e = bus_address_escape(t); | |
1232 | if (!e) | |
1233 | return -ENOMEM; | |
1234 | ||
1235 | c = strappenda(",argv4=--machine=", m); | |
1236 | } | |
1237 | } | |
1238 | ||
1239 | if (!e) { | |
1240 | e = bus_address_escape(host); | |
1241 | if (!e) | |
1242 | return -ENOMEM; | |
1243 | } | |
0f8bd8de | 1244 | |
7f0d207d | 1245 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL); |
09365592 | 1246 | if (!b->address) |
0f8bd8de | 1247 | return -ENOMEM; |
a7893c6b | 1248 | |
09365592 LP |
1249 | return 0; |
1250 | } | |
1251 | ||
1252 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1253 | sd_bus *bus; | |
1254 | int r; | |
1255 | ||
1256 | assert_return(host, -EINVAL); | |
1257 | assert_return(ret, -EINVAL); | |
1258 | ||
a7893c6b | 1259 | r = sd_bus_new(&bus); |
09365592 | 1260 | if (r < 0) |
a7893c6b | 1261 | return r; |
a7893c6b | 1262 | |
09365592 LP |
1263 | r = bus_set_address_system_remote(bus, host); |
1264 | if (r < 0) | |
1265 | goto fail; | |
1266 | ||
a7893c6b | 1267 | bus->bus_client = true; |
09365592 | 1268 | bus->trusted = false; |
a7893c6b LP |
1269 | |
1270 | r = sd_bus_start(bus); | |
09365592 LP |
1271 | if (r < 0) |
1272 | goto fail; | |
a7893c6b LP |
1273 | |
1274 | *ret = bus; | |
1275 | return 0; | |
09365592 LP |
1276 | |
1277 | fail: | |
1278 | bus_free(bus); | |
1279 | return r; | |
a7893c6b LP |
1280 | } |
1281 | ||
09365592 | 1282 | int bus_set_address_system_container(sd_bus *b, const char *machine) { |
a7893c6b | 1283 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1284 | |
09365592 LP |
1285 | assert(b); |
1286 | assert(machine); | |
a7893c6b LP |
1287 | |
1288 | e = bus_address_escape(machine); | |
1289 | if (!e) | |
1290 | return -ENOMEM; | |
1291 | ||
9e554864 | 1292 | #ifdef ENABLE_KDBUS |
09365592 | 1293 | b->address = strjoin("x-container-kernel:machine=", e, ";x-container-unix:machine=", e, NULL); |
9e554864 | 1294 | #else |
09365592 | 1295 | b->address = strjoin("x-container-unix:machine=", e, NULL); |
9e554864 | 1296 | #endif |
09365592 | 1297 | if (!b->address) |
a7893c6b | 1298 | return -ENOMEM; |
0f8bd8de | 1299 | |
09365592 LP |
1300 | return 0; |
1301 | } | |
1302 | ||
1303 | _public_ int sd_bus_open_system_container(sd_bus **ret, const char *machine) { | |
1304 | sd_bus *bus; | |
1305 | int r; | |
1306 | ||
1307 | assert_return(machine, -EINVAL); | |
1308 | assert_return(ret, -EINVAL); | |
1309 | assert_return(filename_is_safe(machine), -EINVAL); | |
1310 | ||
0f8bd8de | 1311 | r = sd_bus_new(&bus); |
09365592 | 1312 | if (r < 0) |
0f8bd8de | 1313 | return r; |
0f8bd8de | 1314 | |
09365592 LP |
1315 | r = bus_set_address_system_container(bus, machine); |
1316 | if (r < 0) | |
1317 | goto fail; | |
1318 | ||
0f8bd8de | 1319 | bus->bus_client = true; |
09365592 | 1320 | bus->trusted = false; |
0f8bd8de LP |
1321 | |
1322 | r = sd_bus_start(bus); | |
09365592 LP |
1323 | if (r < 0) |
1324 | goto fail; | |
0f8bd8de LP |
1325 | |
1326 | *ret = bus; | |
1327 | return 0; | |
09365592 LP |
1328 | |
1329 | fail: | |
1330 | bus_free(bus); | |
1331 | return r; | |
0f8bd8de LP |
1332 | } |
1333 | ||
d9f644e2 | 1334 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1335 | |
de1c301e LP |
1336 | if (!bus) |
1337 | return; | |
d5a2b9a6 LP |
1338 | if (bus->state == BUS_CLOSED) |
1339 | return; | |
1340 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1341 | return; |
1342 | ||
1343 | bus->state = BUS_CLOSED; | |
e82c9509 | 1344 | |
40ca29a1 LP |
1345 | sd_bus_detach_event(bus); |
1346 | ||
0e586eae LP |
1347 | /* Drop all queued messages so that they drop references to |
1348 | * the bus object and the bus may be freed */ | |
1349 | bus_reset_queues(bus); | |
1350 | ||
f54514f3 LP |
1351 | if (!bus->is_kernel) |
1352 | bus_close_fds(bus); | |
1353 | ||
1354 | /* We'll leave the fd open in case this is a kernel bus, since | |
1355 | * there might still be memblocks around that reference this | |
cd6d5e1c | 1356 | * bus, and they might need to invoke the KDBUS_CMD_FREE |
1d0e3c98 | 1357 | * ioctl on the fd when they are freed. */ |
de1c301e LP |
1358 | } |
1359 | ||
718db961 LP |
1360 | static void bus_enter_closing(sd_bus *bus) { |
1361 | assert(bus); | |
1362 | ||
1363 | if (bus->state != BUS_OPENING && | |
1364 | bus->state != BUS_AUTHENTICATING && | |
1365 | bus->state != BUS_HELLO && | |
1366 | bus->state != BUS_RUNNING) | |
1367 | return; | |
1368 | ||
1369 | bus->state = BUS_CLOSING; | |
1370 | } | |
1371 | ||
d9f644e2 | 1372 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
9d6c7c82 | 1373 | assert_return(bus, NULL); |
de1c301e | 1374 | |
e4ee6e5c | 1375 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1376 | |
de1c301e LP |
1377 | return bus; |
1378 | } | |
1379 | ||
d9f644e2 | 1380 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1381 | unsigned i; |
5b1bc83f LP |
1382 | |
1383 | if (!bus) | |
1384 | return NULL; | |
de1c301e | 1385 | |
f389bf15 LP |
1386 | i = REFCNT_DEC(bus->n_ref); |
1387 | if (i > 0) | |
1388 | return NULL; | |
1389 | ||
1390 | bus_free(bus); | |
de1c301e LP |
1391 | return NULL; |
1392 | } | |
1393 | ||
d9f644e2 | 1394 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1395 | |
1396 | assert_return(bus, -EINVAL); | |
1397 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1398 | |
f54514f3 | 1399 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1400 | } |
1401 | ||
d9f644e2 | 1402 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1403 | int r; |
1404 | ||
d6888822 LP |
1405 | assert_return(bus, -EINVAL); |
1406 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1407 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1408 | |
09365592 LP |
1409 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1410 | return 0; | |
1411 | ||
d728d708 | 1412 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1413 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1414 | return 0; |
1415 | ||
20902f3e | 1416 | r = bus_ensure_running(bus); |
d728d708 LP |
1417 | if (r < 0) |
1418 | return r; | |
de1c301e | 1419 | |
d728d708 LP |
1420 | return bus->can_fds; |
1421 | } | |
1422 | ||
1423 | return bus_type_is_valid(type); | |
de1c301e LP |
1424 | } |
1425 | ||
d9f644e2 | 1426 | _public_ int sd_bus_get_server_id(sd_bus *bus, sd_id128_t *server_id) { |
d728d708 | 1427 | int r; |
de1c301e | 1428 | |
d6888822 LP |
1429 | assert_return(bus, -EINVAL); |
1430 | assert_return(server_id, -EINVAL); | |
1431 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1432 | |
20902f3e | 1433 | r = bus_ensure_running(bus); |
d728d708 LP |
1434 | if (r < 0) |
1435 | return r; | |
de1c301e | 1436 | |
98178d39 | 1437 | *server_id = bus->server_id; |
d728d708 | 1438 | return 0; |
de1c301e LP |
1439 | } |
1440 | ||
3df7a7e6 | 1441 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1442 | assert(b); |
de1c301e LP |
1443 | assert(m); |
1444 | ||
aea93deb LP |
1445 | if (m->sealed) { |
1446 | /* If we copy the same message to multiple | |
693eb9a2 | 1447 | * destinations, avoid using the same cookie |
aea93deb | 1448 | * numbers. */ |
693eb9a2 | 1449 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1450 | return 0; |
aea93deb | 1451 | } |
de1c301e | 1452 | |
3df7a7e6 LP |
1453 | if (timeout == 0) |
1454 | timeout = BUS_DEFAULT_TIMEOUT; | |
1455 | ||
693eb9a2 | 1456 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1457 | } |
1458 | ||
e1c433c6 LP |
1459 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
1460 | assert(b); | |
1461 | ||
6f285378 | 1462 | /* Do packet version and endianness already match? */ |
e1c433c6 LP |
1463 | if ((b->message_version == 0 || b->message_version == (*m)->header->version) && |
1464 | (b->message_endian == 0 || b->message_endian == (*m)->header->endian)) | |
1465 | return 0; | |
1466 | ||
1467 | /* No? Then remarshal! */ | |
1468 | return bus_message_remarshal(b, m); | |
1469 | } | |
1470 | ||
7adc46fc LP |
1471 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1472 | assert(b); | |
1473 | assert(m); | |
1474 | ||
7adc46fc LP |
1475 | /* The bus specification says the serial number cannot be 0, |
1476 | * hence let's fill something in for synthetic messages. Since | |
1477 | * synthetic messages might have a fake sender and we don't | |
1478 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1479 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1480 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1481 | * even though kdbus can do 64bit. */ | |
1482 | ||
3df7a7e6 | 1483 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1484 | } |
1485 | ||
069f5e61 | 1486 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1487 | int r; |
1488 | ||
718db961 | 1489 | assert(bus); |
2e3db52d | 1490 | assert(m); |
718db961 LP |
1491 | |
1492 | if (bus->is_kernel) | |
069f5e61 | 1493 | r = bus_kernel_write_message(bus, m, hint_sync_call); |
718db961 | 1494 | else |
2e3db52d LP |
1495 | r = bus_socket_write_message(bus, m, idx); |
1496 | ||
1497 | if (r <= 0) | |
1498 | return r; | |
1499 | ||
90911bb6 | 1500 | if (bus->is_kernel || *idx >= BUS_MESSAGE_SIZE(m)) |
42c4ebcb | 1501 | 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 |
1502 | bus_message_type_to_string(m->header->type), |
1503 | strna(sd_bus_message_get_sender(m)), | |
1504 | strna(sd_bus_message_get_destination(m)), | |
1505 | strna(sd_bus_message_get_path(m)), | |
1506 | strna(sd_bus_message_get_interface(m)), | |
1507 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1508 | BUS_MESSAGE_COOKIE(m), |
1509 | m->reply_cookie, | |
2e3db52d LP |
1510 | strna(m->error.message)); |
1511 | ||
1512 | return r; | |
718db961 LP |
1513 | } |
1514 | ||
de1c301e | 1515 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1516 | int r, ret = 0; |
de1c301e LP |
1517 | |
1518 | assert(bus); | |
89ffcd2a | 1519 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1520 | |
de1c301e LP |
1521 | while (bus->wqueue_size > 0) { |
1522 | ||
069f5e61 | 1523 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1524 | if (r < 0) |
de1c301e | 1525 | return r; |
718db961 | 1526 | else if (r == 0) |
e3017af9 LP |
1527 | /* Didn't do anything this time */ |
1528 | return ret; | |
6629161f | 1529 | else if (bus->is_kernel || bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1530 | /* Fully written. Let's drop the entry from |
1531 | * the queue. | |
1532 | * | |
1533 | * This isn't particularly optimized, but | |
1534 | * well, this is supposed to be our worst-case | |
1535 | * buffer only, and the socket buffer is | |
1536 | * supposed to be our primary buffer, and if | |
1537 | * it got full, then all bets are off | |
1538 | * anyway. */ | |
1539 | ||
de1c301e | 1540 | bus->wqueue_size --; |
c4e6e242 | 1541 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1542 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1543 | bus->windex = 0; | |
1544 | ||
e3017af9 | 1545 | ret = 1; |
de1c301e LP |
1546 | } |
1547 | } | |
1548 | ||
e3017af9 | 1549 | return ret; |
de1c301e LP |
1550 | } |
1551 | ||
766c5809 | 1552 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1553 | assert(bus); |
1554 | ||
1555 | if (bus->is_kernel) | |
766c5809 | 1556 | return bus_kernel_read_message(bus, hint_priority, priority); |
7d22c717 LP |
1557 | else |
1558 | return bus_socket_read_message(bus); | |
1559 | } | |
1560 | ||
7adc46fc | 1561 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1562 | assert(bus); |
7d22c717 | 1563 | |
821e0756 | 1564 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1565 | return -ENOBUFS; |
1566 | ||
821e0756 | 1567 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1568 | return -ENOMEM; |
1569 | ||
7d22c717 LP |
1570 | return 0; |
1571 | } | |
1572 | ||
766c5809 | 1573 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1574 | int r, ret = 0; |
de1c301e LP |
1575 | |
1576 | assert(bus); | |
1577 | assert(m); | |
89ffcd2a | 1578 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
de1c301e | 1579 | |
766c5809 LP |
1580 | /* Note that the priority logic is only available on kdbus, |
1581 | * where the rqueue is unused. We check the rqueue here | |
1582 | * anyway, because it's simple... */ | |
1583 | ||
7d22c717 LP |
1584 | for (;;) { |
1585 | if (bus->rqueue_size > 0) { | |
1586 | /* Dispatch a queued message */ | |
de1c301e | 1587 | |
7d22c717 LP |
1588 | *m = bus->rqueue[0]; |
1589 | bus->rqueue_size --; | |
1590 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1591 | return 1; | |
1592 | } | |
de1c301e | 1593 | |
7d22c717 | 1594 | /* Try to read a new message */ |
766c5809 | 1595 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1596 | if (r < 0) |
e3017af9 | 1597 | return r; |
e3017af9 LP |
1598 | if (r == 0) |
1599 | return ret; | |
de1c301e | 1600 | |
2e8d788c | 1601 | ret = 1; |
7d22c717 | 1602 | } |
de1c301e LP |
1603 | } |
1604 | ||
069f5e61 | 1605 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
e1c433c6 | 1606 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1607 | int r; |
1608 | ||
d6888822 | 1609 | assert_return(bus, -EINVAL); |
d6888822 LP |
1610 | assert_return(m, -EINVAL); |
1611 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1612 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
021a1e78 | 1613 | |
a3d59cd1 LP |
1614 | if (!BUS_IS_OPEN(bus->state)) |
1615 | return -ENOTCONN; | |
1616 | ||
021a1e78 LP |
1617 | if (m->n_fds > 0) { |
1618 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1619 | if (r < 0) | |
1620 | return r; | |
1621 | if (r == 0) | |
1622 | return -ENOTSUP; | |
1623 | } | |
de1c301e | 1624 | |
693eb9a2 | 1625 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1626 | * is expected */ |
693eb9a2 | 1627 | if (!cookie && !m->sealed) |
0461f8cd | 1628 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1629 | |
3df7a7e6 | 1630 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1631 | if (r < 0) |
1632 | return r; | |
1633 | ||
441d56a1 | 1634 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1635 | * message and place a replacement in m */ |
1636 | r = bus_remarshal_message(bus, &m); | |
1637 | if (r < 0) | |
1638 | return r; | |
1639 | ||
5407f2de LP |
1640 | /* If this is a reply and no reply was requested, then let's |
1641 | * suppress this, if we can */ | |
693eb9a2 | 1642 | if (m->dont_send && !cookie) |
7a37d625 | 1643 | return 1; |
5407f2de | 1644 | |
89ffcd2a | 1645 | if ((bus->state == BUS_RUNNING || bus->state == BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1646 | size_t idx = 0; |
1647 | ||
069f5e61 | 1648 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1649 | if (r < 0) { |
441d56a1 | 1650 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1651 | bus_enter_closing(bus); |
441d56a1 LP |
1652 | return -ECONNRESET; |
1653 | } | |
32f46480 | 1654 | |
de1c301e | 1655 | return r; |
32f46480 | 1656 | } else if (!bus->is_kernel && idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1657 | /* Wasn't fully written. So let's remember how |
1658 | * much was written. Note that the first entry | |
1659 | * of the wqueue array is always allocated so | |
1660 | * that we always can remember how much was | |
1661 | * written. */ | |
1662 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1663 | bus->wqueue_size = 1; | |
1664 | bus->windex = idx; | |
1665 | } | |
1666 | } else { | |
de1c301e LP |
1667 | /* Just append it to the queue. */ |
1668 | ||
25220239 | 1669 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1670 | return -ENOBUFS; |
1671 | ||
821e0756 | 1672 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1673 | return -ENOMEM; |
1674 | ||
821e0756 | 1675 | bus->wqueue[bus->wqueue_size ++] = sd_bus_message_ref(m); |
de1c301e LP |
1676 | } |
1677 | ||
693eb9a2 LP |
1678 | if (cookie) |
1679 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1680 | |
7a37d625 | 1681 | return 1; |
de1c301e LP |
1682 | } |
1683 | ||
069f5e61 LP |
1684 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1685 | return bus_send_internal(bus, m, cookie, false); | |
1686 | } | |
1687 | ||
693eb9a2 | 1688 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1689 | int r; |
1690 | ||
1691 | assert_return(bus, -EINVAL); | |
911121a7 LP |
1692 | assert_return(m, -EINVAL); |
1693 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
1694 | ||
a3d59cd1 LP |
1695 | if (!BUS_IS_OPEN(bus->state)) |
1696 | return -ENOTCONN; | |
1697 | ||
911121a7 LP |
1698 | if (!streq_ptr(m->destination, destination)) { |
1699 | ||
1700 | if (!destination) | |
1701 | return -EEXIST; | |
1702 | ||
1703 | r = sd_bus_message_set_destination(m, destination); | |
1704 | if (r < 0) | |
1705 | return r; | |
1706 | } | |
1707 | ||
693eb9a2 | 1708 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1709 | } |
1710 | ||
de1c301e LP |
1711 | static usec_t calc_elapse(uint64_t usec) { |
1712 | if (usec == (uint64_t) -1) | |
1713 | return 0; | |
1714 | ||
de1c301e LP |
1715 | return now(CLOCK_MONOTONIC) + usec; |
1716 | } | |
1717 | ||
e3017af9 LP |
1718 | static int timeout_compare(const void *a, const void *b) { |
1719 | const struct reply_callback *x = a, *y = b; | |
1720 | ||
1721 | if (x->timeout != 0 && y->timeout == 0) | |
1722 | return -1; | |
1723 | ||
1724 | if (x->timeout == 0 && y->timeout != 0) | |
1725 | return 1; | |
1726 | ||
1727 | if (x->timeout < y->timeout) | |
1728 | return -1; | |
1729 | ||
1730 | if (x->timeout > y->timeout) | |
1731 | return 1; | |
1732 | ||
1733 | return 0; | |
1734 | } | |
1735 | ||
c49b30a2 | 1736 | _public_ int sd_bus_call_async( |
de1c301e | 1737 | sd_bus *bus, |
19befb2d | 1738 | sd_bus_slot **slot, |
e1c433c6 | 1739 | sd_bus_message *_m, |
52f3ba91 | 1740 | sd_bus_message_handler_t callback, |
de1c301e | 1741 | void *userdata, |
19befb2d | 1742 | uint64_t usec) { |
de1c301e | 1743 | |
e1c433c6 | 1744 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
19befb2d | 1745 | _cleanup_bus_slot_unref_ sd_bus_slot *s = NULL; |
de1c301e LP |
1746 | int r; |
1747 | ||
d6888822 | 1748 | assert_return(bus, -EINVAL); |
d6888822 | 1749 | assert_return(m, -EINVAL); |
40ca29a1 | 1750 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1751 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 LP |
1752 | assert_return(callback, -EINVAL); |
1753 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1754 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
89ffcd2a | 1755 | |
a3d59cd1 LP |
1756 | if (!BUS_IS_OPEN(bus->state)) |
1757 | return -ENOTCONN; | |
1758 | ||
89ffcd2a LP |
1759 | r = hashmap_ensure_allocated(&bus->reply_callbacks, uint64_hash_func, uint64_compare_func); |
1760 | if (r < 0) | |
1761 | return r; | |
de1c301e | 1762 | |
3df7a7e6 LP |
1763 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1764 | if (r < 0) | |
1765 | return r; | |
e3017af9 | 1766 | |
3df7a7e6 | 1767 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1768 | if (r < 0) |
1769 | return r; | |
1770 | ||
e1c433c6 LP |
1771 | r = bus_remarshal_message(bus, &m); |
1772 | if (r < 0) | |
1773 | return r; | |
1774 | ||
19befb2d LP |
1775 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1776 | if (!s) | |
de1c301e LP |
1777 | return -ENOMEM; |
1778 | ||
19befb2d | 1779 | s->reply_callback.callback = callback; |
de1c301e | 1780 | |
19befb2d LP |
1781 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
1782 | r = hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); | |
de1c301e | 1783 | if (r < 0) { |
19befb2d | 1784 | s->reply_callback.cookie = 0; |
de1c301e LP |
1785 | return r; |
1786 | } | |
1787 | ||
19befb2d LP |
1788 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1789 | if (s->reply_callback.timeout != 0) { | |
1790 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1791 | if (r < 0) { |
19befb2d | 1792 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1793 | return r; |
1794 | } | |
1795 | } | |
1796 | ||
19befb2d LP |
1797 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1798 | if (r < 0) | |
de1c301e | 1799 | return r; |
de1c301e | 1800 | |
19befb2d LP |
1801 | if (slot) |
1802 | *slot = s; | |
1803 | s = NULL; | |
e3017af9 | 1804 | |
19befb2d | 1805 | return r; |
de1c301e LP |
1806 | } |
1807 | ||
20902f3e | 1808 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1809 | int r; |
1810 | ||
1811 | assert(bus); | |
1812 | ||
718db961 | 1813 | if (bus->state == BUS_UNSET || bus->state == BUS_CLOSED || bus->state == BUS_CLOSING) |
021a1e78 | 1814 | return -ENOTCONN; |
d728d708 LP |
1815 | if (bus->state == BUS_RUNNING) |
1816 | return 1; | |
89ffcd2a LP |
1817 | |
1818 | for (;;) { | |
1819 | r = sd_bus_process(bus, NULL); | |
1820 | if (r < 0) | |
1821 | return r; | |
d728d708 LP |
1822 | if (bus->state == BUS_RUNNING) |
1823 | return 1; | |
e3017af9 LP |
1824 | if (r > 0) |
1825 | continue; | |
89ffcd2a LP |
1826 | |
1827 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1828 | if (r < 0) | |
1829 | return r; | |
1830 | } | |
1831 | } | |
1832 | ||
97f82db3 | 1833 | _public_ int sd_bus_call( |
de1c301e | 1834 | sd_bus *bus, |
97f82db3 | 1835 | sd_bus_message *_m, |
de1c301e LP |
1836 | uint64_t usec, |
1837 | sd_bus_error *error, | |
1838 | sd_bus_message **reply) { | |
1839 | ||
97f82db3 | 1840 | _cleanup_bus_message_unref_ sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1841 | usec_t timeout; |
693eb9a2 | 1842 | uint64_t cookie; |
7d22c717 LP |
1843 | unsigned i; |
1844 | int r; | |
de1c301e | 1845 | |
97f82db3 | 1846 | assert_return(bus, -EINVAL); |
97f82db3 KS |
1847 | assert_return(m, -EINVAL); |
1848 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); | |
1849 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); | |
1850 | assert_return(!bus_error_is_dirty(error), -EINVAL); | |
1851 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
09365592 | 1852 | assert_return(!bus->is_kernel || !(bus->hello_flags & KDBUS_HELLO_MONITOR), -EROFS); |
97f82db3 | 1853 | |
a3d59cd1 LP |
1854 | if (!BUS_IS_OPEN(bus->state)) |
1855 | return -ENOTCONN; | |
1856 | ||
97f82db3 KS |
1857 | r = bus_ensure_running(bus); |
1858 | if (r < 0) | |
1859 | return r; | |
1860 | ||
a43b9ca3 | 1861 | i = bus->rqueue_size; |
97f82db3 KS |
1862 | |
1863 | r = bus_seal_message(bus, m, usec); | |
1864 | if (r < 0) | |
1865 | return r; | |
1866 | ||
1867 | r = bus_remarshal_message(bus, &m); | |
1868 | if (r < 0) | |
1869 | return r; | |
1870 | ||
069f5e61 | 1871 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e LP |
1872 | if (r < 0) |
1873 | return r; | |
1874 | ||
3df7a7e6 | 1875 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1876 | |
1877 | for (;;) { | |
1878 | usec_t left; | |
de1c301e | 1879 | |
7d22c717 LP |
1880 | while (i < bus->rqueue_size) { |
1881 | sd_bus_message *incoming = NULL; | |
1882 | ||
1883 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1884 | |
693eb9a2 | 1885 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1886 | /* Found a match! */ |
1887 | ||
7d22c717 LP |
1888 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1889 | bus->rqueue_size--; | |
1890 | ||
40ca29a1 | 1891 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 1892 | |
2ce97e2b LP |
1893 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
1894 | if (reply) | |
1895 | *reply = incoming; | |
1896 | else | |
1897 | sd_bus_message_unref(incoming); | |
1898 | ||
1899 | return 1; | |
1900 | } | |
1901 | ||
1902 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
b7f247e0 | 1903 | |
a43b9ca3 | 1904 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) |
de1c301e | 1905 | r = sd_bus_error_copy(error, &incoming->error); |
a43b9ca3 LP |
1906 | else |
1907 | r = -EIO; | |
de1c301e LP |
1908 | |
1909 | sd_bus_message_unref(incoming); | |
a43b9ca3 | 1910 | return r; |
a8a07f89 | 1911 | |
693eb9a2 | 1912 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
1913 | bus->unique_name && |
1914 | incoming->sender && | |
1915 | streq(bus->unique_name, incoming->sender)) { | |
1916 | ||
7d22c717 LP |
1917 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1918 | bus->rqueue_size--; | |
1919 | ||
a8a07f89 LP |
1920 | /* Our own message? Somebody is trying |
1921 | * to send its own client a message, | |
1922 | * let's not dead-lock, let's fail | |
1923 | * immediately. */ | |
1924 | ||
1925 | sd_bus_message_unref(incoming); | |
1926 | return -ELOOP; | |
de1c301e LP |
1927 | } |
1928 | ||
de1c301e | 1929 | /* Try to read more, right-away */ |
7d22c717 | 1930 | i++; |
de1c301e | 1931 | } |
7d22c717 | 1932 | |
766c5809 | 1933 | r = bus_read_message(bus, false, 0); |
32f46480 | 1934 | if (r < 0) { |
441d56a1 | 1935 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1936 | bus_enter_closing(bus); |
441d56a1 LP |
1937 | return -ECONNRESET; |
1938 | } | |
32f46480 | 1939 | |
a43b9ca3 | 1940 | return r; |
32f46480 | 1941 | } |
7d22c717 | 1942 | if (r > 0) |
e3017af9 | 1943 | continue; |
de1c301e LP |
1944 | |
1945 | if (timeout > 0) { | |
1946 | usec_t n; | |
1947 | ||
1948 | n = now(CLOCK_MONOTONIC); | |
1949 | if (n >= timeout) | |
1950 | return -ETIMEDOUT; | |
1951 | ||
1952 | left = timeout - n; | |
1953 | } else | |
1954 | left = (uint64_t) -1; | |
1955 | ||
e3017af9 | 1956 | r = bus_poll(bus, true, left); |
de1c301e LP |
1957 | if (r < 0) |
1958 | return r; | |
f8e11cda LP |
1959 | if (r == 0) |
1960 | return -ETIMEDOUT; | |
de1c301e LP |
1961 | |
1962 | r = dispatch_wqueue(bus); | |
32f46480 | 1963 | if (r < 0) { |
441d56a1 | 1964 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 1965 | bus_enter_closing(bus); |
441d56a1 LP |
1966 | return -ECONNRESET; |
1967 | } | |
32f46480 | 1968 | |
de1c301e | 1969 | return r; |
32f46480 | 1970 | } |
de1c301e LP |
1971 | } |
1972 | } | |
1973 | ||
d9f644e2 | 1974 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1975 | |
1976 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1977 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1978 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1979 | |
e82c9509 | 1980 | return bus->input_fd; |
de1c301e LP |
1981 | } |
1982 | ||
d9f644e2 | 1983 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1984 | int flags = 0; |
1985 | ||
d6888822 | 1986 | assert_return(bus, -EINVAL); |
d6888822 | 1987 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1988 | |
a3d59cd1 LP |
1989 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
1990 | return -ENOTCONN; | |
1991 | ||
de1c301e LP |
1992 | if (bus->state == BUS_OPENING) |
1993 | flags |= POLLOUT; | |
89ffcd2a LP |
1994 | else if (bus->state == BUS_AUTHENTICATING) { |
1995 | ||
2181a7f5 | 1996 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1997 | flags |= POLLOUT; |
1998 | ||
1999 | flags |= POLLIN; | |
2000 | ||
2001 | } else if (bus->state == BUS_RUNNING || bus->state == BUS_HELLO) { | |
de1c301e LP |
2002 | if (bus->rqueue_size <= 0) |
2003 | flags |= POLLIN; | |
2004 | if (bus->wqueue_size > 0) | |
2005 | flags |= POLLOUT; | |
2006 | } | |
2007 | ||
2008 | return flags; | |
2009 | } | |
2010 | ||
d9f644e2 | 2011 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2012 | struct reply_callback *c; |
2013 | ||
d6888822 LP |
2014 | assert_return(bus, -EINVAL); |
2015 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2016 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2017 | |
a3d59cd1 LP |
2018 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2019 | return -ENOTCONN; | |
2020 | ||
8f8f05a9 LP |
2021 | if (bus->track_queue) { |
2022 | *timeout_usec = 0; | |
2023 | return 1; | |
2024 | } | |
2025 | ||
718db961 LP |
2026 | if (bus->state == BUS_CLOSING) { |
2027 | *timeout_usec = 0; | |
2028 | return 1; | |
2029 | } | |
2030 | ||
e3017af9 LP |
2031 | if (bus->state == BUS_AUTHENTICATING) { |
2032 | *timeout_usec = bus->auth_timeout; | |
2033 | return 1; | |
2034 | } | |
2035 | ||
adee69fa LP |
2036 | if (bus->state != BUS_RUNNING && bus->state != BUS_HELLO) { |
2037 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2038 | return 0; |
adee69fa | 2039 | } |
e3017af9 | 2040 | |
8efd6381 LP |
2041 | if (bus->rqueue_size > 0) { |
2042 | *timeout_usec = 0; | |
2043 | return 1; | |
2044 | } | |
2045 | ||
e3017af9 | 2046 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2047 | if (!c) { |
2048 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2049 | return 0; |
adee69fa | 2050 | } |
e3017af9 | 2051 | |
19befb2d LP |
2052 | if (c->timeout == 0) { |
2053 | *timeout_usec = (uint64_t) -1; | |
2054 | return 0; | |
2055 | } | |
2056 | ||
e3017af9 LP |
2057 | *timeout_usec = c->timeout; |
2058 | return 1; | |
2059 | } | |
2060 | ||
2061 | static int process_timeout(sd_bus *bus) { | |
ebcf1f97 | 2062 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
eb01ba5d | 2063 | _cleanup_bus_message_unref_ sd_bus_message* m = NULL; |
e3017af9 | 2064 | struct reply_callback *c; |
1b64f838 | 2065 | sd_bus_slot *slot; |
e3017af9 LP |
2066 | usec_t n; |
2067 | int r; | |
2068 | ||
2069 | assert(bus); | |
2070 | ||
2071 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2072 | if (!c) | |
2073 | return 0; | |
2074 | ||
2075 | n = now(CLOCK_MONOTONIC); | |
2076 | if (c->timeout > n) | |
2077 | return 0; | |
2078 | ||
eb01ba5d LP |
2079 | r = bus_message_new_synthetic_error( |
2080 | bus, | |
693eb9a2 | 2081 | c->cookie, |
14c24659 | 2082 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2083 | &m); |
2084 | if (r < 0) | |
2085 | return r; | |
2086 | ||
34a2c9e8 LP |
2087 | m->sender = "org.freedesktop.DBus"; |
2088 | ||
7adc46fc | 2089 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2090 | if (r < 0) |
2091 | return r; | |
2092 | ||
e3017af9 | 2093 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2094 | c->timeout = 0; |
2095 | ||
693eb9a2 | 2096 | hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2097 | c->cookie = 0; |
2098 | ||
1b64f838 | 2099 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2100 | |
718db961 LP |
2101 | bus->iteration_counter ++; |
2102 | ||
1b64f838 LP |
2103 | bus->current_message = m; |
2104 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2105 | bus->current_handler = c->callback; |
2106 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2107 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2108 | bus->current_userdata = NULL; |
2109 | bus->current_handler = NULL; | |
d974ad05 | 2110 | bus->current_slot = NULL; |
19befb2d | 2111 | bus->current_message = NULL; |
718db961 | 2112 | |
1b64f838 LP |
2113 | if (slot->floating) { |
2114 | bus_slot_disconnect(slot); | |
2115 | sd_bus_slot_unref(slot); | |
2116 | } | |
2117 | ||
d974ad05 DH |
2118 | sd_bus_slot_unref(slot); |
2119 | ||
1b64f838 | 2120 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2121 | } |
2122 | ||
9d373862 LP |
2123 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2124 | assert(bus); | |
2125 | assert(m); | |
2126 | ||
2127 | if (bus->state != BUS_HELLO) | |
2128 | return 0; | |
2129 | ||
2130 | /* Let's make sure the first message on the bus is the HELLO | |
2131 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2132 | * here (we leave that to the usual handling), we just verify |
2133 | * we don't let any earlier msg through. */ | |
9d373862 | 2134 | |
40ca29a1 LP |
2135 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2136 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
9d373862 LP |
2137 | return -EIO; |
2138 | ||
19befb2d | 2139 | if (m->reply_cookie != 1) |
9d373862 LP |
2140 | return -EIO; |
2141 | ||
2142 | return 0; | |
2143 | } | |
2144 | ||
a652755d | 2145 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
2ce97e2b | 2146 | _cleanup_bus_message_unref_ sd_bus_message *synthetic_reply = NULL; |
ebcf1f97 | 2147 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
19befb2d | 2148 | struct reply_callback *c; |
1b64f838 | 2149 | sd_bus_slot *slot; |
a652755d LP |
2150 | int r; |
2151 | ||
2152 | assert(bus); | |
2153 | assert(m); | |
2154 | ||
40ca29a1 LP |
2155 | if (m->header->type != SD_BUS_MESSAGE_METHOD_RETURN && |
2156 | m->header->type != SD_BUS_MESSAGE_METHOD_ERROR) | |
a652755d LP |
2157 | return 0; |
2158 | ||
09365592 LP |
2159 | if (bus->is_kernel && (bus->hello_flags & KDBUS_HELLO_MONITOR)) |
2160 | return 0; | |
2161 | ||
2162 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) | |
2163 | return 0; | |
2164 | ||
693eb9a2 | 2165 | c = hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2166 | if (!c) |
2167 | return 0; | |
2168 | ||
19befb2d | 2169 | c->cookie = 0; |
19befb2d | 2170 | |
1b64f838 | 2171 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2172 | |
2ce97e2b LP |
2173 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2174 | ||
2175 | /* If the reply contained a file descriptor which we | |
2176 | * didn't want we pass an error instead. */ | |
2177 | ||
2178 | r = bus_message_new_synthetic_error( | |
2179 | bus, | |
2180 | m->reply_cookie, | |
2181 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2182 | &synthetic_reply); | |
2183 | if (r < 0) | |
1b64f838 | 2184 | return r; |
2ce97e2b LP |
2185 | |
2186 | r = bus_seal_synthetic_message(bus, synthetic_reply); | |
2187 | if (r < 0) | |
1b64f838 | 2188 | return r; |
2ce97e2b LP |
2189 | |
2190 | m = synthetic_reply; | |
2191 | } else { | |
2192 | r = sd_bus_message_rewind(m, true); | |
2193 | if (r < 0) | |
1b64f838 | 2194 | return r; |
2ce97e2b | 2195 | } |
88fe224c | 2196 | |
1b64f838 LP |
2197 | if (c->timeout != 0) { |
2198 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2199 | c->timeout = 0; | |
2200 | } | |
19befb2d | 2201 | |
1b64f838 | 2202 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2203 | bus->current_handler = c->callback; |
2204 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2205 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2206 | bus->current_userdata = NULL; |
2207 | bus->current_handler = NULL; | |
d974ad05 | 2208 | bus->current_slot = NULL; |
a652755d | 2209 | |
19befb2d LP |
2210 | if (slot->floating) { |
2211 | bus_slot_disconnect(slot); | |
2212 | sd_bus_slot_unref(slot); | |
2213 | } | |
2214 | ||
d974ad05 DH |
2215 | sd_bus_slot_unref(slot); |
2216 | ||
1b64f838 | 2217 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2218 | } |
2219 | ||
2220 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
ebcf1f97 | 2221 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2222 | struct filter_callback *l; |
2223 | int r; | |
2224 | ||
392d5b37 LP |
2225 | assert(bus); |
2226 | assert(m); | |
2227 | ||
7286037f LP |
2228 | do { |
2229 | bus->filter_callbacks_modified = false; | |
2230 | ||
2231 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2232 | sd_bus_slot *slot; |
7286037f LP |
2233 | |
2234 | if (bus->filter_callbacks_modified) | |
2235 | break; | |
2236 | ||
2237 | /* Don't run this more than once per iteration */ | |
2238 | if (l->last_iteration == bus->iteration_counter) | |
2239 | continue; | |
2240 | ||
2241 | l->last_iteration = bus->iteration_counter; | |
2242 | ||
88fe224c LP |
2243 | r = sd_bus_message_rewind(m, true); |
2244 | if (r < 0) | |
2245 | return r; | |
2246 | ||
1b64f838 LP |
2247 | slot = container_of(l, sd_bus_slot, filter_callback); |
2248 | ||
2249 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2250 | bus->current_handler = l->callback; |
2251 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2252 | r = l->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2253 | bus->current_userdata = NULL; |
2254 | bus->current_handler = NULL; | |
1b64f838 | 2255 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2256 | |
ebcf1f97 | 2257 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2258 | if (r != 0) |
2259 | return r; | |
2260 | ||
2261 | } | |
2262 | ||
2263 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2264 | |
2265 | return 0; | |
2266 | } | |
2267 | ||
392d5b37 | 2268 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2269 | int r; |
2270 | ||
392d5b37 LP |
2271 | assert(bus); |
2272 | assert(m); | |
2273 | ||
7286037f LP |
2274 | do { |
2275 | bus->match_callbacks_modified = false; | |
2276 | ||
eb01ba5d | 2277 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2278 | if (r != 0) |
2279 | return r; | |
2280 | ||
2281 | } while (bus->match_callbacks_modified); | |
2282 | ||
2283 | return 0; | |
392d5b37 LP |
2284 | } |
2285 | ||
b9bf7e2b LP |
2286 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
2287 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
2288 | int r; | |
2289 | ||
2290 | assert(bus); | |
2291 | assert(m); | |
2292 | ||
09365592 LP |
2293 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2294 | return 0; | |
2295 | ||
758bf0c7 LP |
2296 | if (bus->manual_peer_interface) |
2297 | return 0; | |
2298 | ||
40ca29a1 | 2299 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2300 | return 0; |
2301 | ||
2302 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2303 | return 0; | |
2304 | ||
0461f8cd | 2305 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2306 | return 1; |
2307 | ||
2308 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2309 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2310 | else if (streq_ptr(m->member, "GetMachineId")) { |
2311 | sd_id128_t id; | |
2312 | char sid[33]; | |
2313 | ||
2314 | r = sd_id128_get_machine(&id); | |
2315 | if (r < 0) | |
2316 | return r; | |
2317 | ||
df2d202e | 2318 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2319 | if (r < 0) |
2320 | return r; | |
2321 | ||
2322 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2323 | } else { | |
29ddb38f | 2324 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2325 | m, &reply, |
40ca29a1 | 2326 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2327 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2328 | } |
2329 | ||
2330 | if (r < 0) | |
2331 | return r; | |
2332 | ||
2333 | r = sd_bus_send(bus, reply, NULL); | |
2334 | if (r < 0) | |
2335 | return r; | |
2336 | ||
2337 | return 1; | |
2338 | } | |
2339 | ||
2ce97e2b LP |
2340 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2341 | assert(bus); | |
2342 | assert(m); | |
2343 | ||
2344 | /* If we got a message with a file descriptor which we didn't | |
2345 | * want to accept, then let's drop it. How can this even | |
2346 | * happen? For example, when the kernel queues a message into | |
2347 | * an activatable names's queue which allows fds, and then is | |
2348 | * delivered to us later even though we ourselves did not | |
2349 | * negotiate it. */ | |
2350 | ||
09365592 LP |
2351 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2352 | return 0; | |
2353 | ||
2ce97e2b LP |
2354 | if (m->n_fds <= 0) |
2355 | return 0; | |
2356 | ||
2357 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2358 | return 0; | |
2359 | ||
2360 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2361 | return 1; /* just eat it up */ | |
2362 | ||
2363 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2364 | } | |
2365 | ||
992c052c | 2366 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2367 | int r; |
2368 | ||
2369 | assert(bus); | |
992c052c | 2370 | assert(m); |
e3017af9 | 2371 | |
19befb2d | 2372 | bus->current_message = m; |
992c052c | 2373 | bus->iteration_counter++; |
e3017af9 | 2374 | |
42c4ebcb | 2375 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error=%s", |
4cdf0751 | 2376 | bus_message_type_to_string(m->header->type), |
40ca29a1 | 2377 | strna(sd_bus_message_get_sender(m)), |
4cdf0751 | 2378 | strna(sd_bus_message_get_destination(m)), |
40ca29a1 LP |
2379 | strna(sd_bus_message_get_path(m)), |
2380 | strna(sd_bus_message_get_interface(m)), | |
4cdf0751 | 2381 | strna(sd_bus_message_get_member(m)), |
42c4ebcb LP |
2382 | BUS_MESSAGE_COOKIE(m), |
2383 | m->reply_cookie, | |
4cdf0751 | 2384 | strna(m->error.message)); |
40ca29a1 | 2385 | |
992c052c LP |
2386 | r = process_hello(bus, m); |
2387 | if (r != 0) | |
affff0b6 | 2388 | goto finish; |
a652755d | 2389 | |
992c052c LP |
2390 | r = process_reply(bus, m); |
2391 | if (r != 0) | |
affff0b6 | 2392 | goto finish; |
e3017af9 | 2393 | |
2ce97e2b LP |
2394 | r = process_fd_check(bus, m); |
2395 | if (r != 0) | |
2396 | goto finish; | |
2397 | ||
992c052c LP |
2398 | r = process_filter(bus, m); |
2399 | if (r != 0) | |
affff0b6 | 2400 | goto finish; |
a652755d | 2401 | |
992c052c LP |
2402 | r = process_match(bus, m); |
2403 | if (r != 0) | |
affff0b6 | 2404 | goto finish; |
a652755d | 2405 | |
992c052c LP |
2406 | r = process_builtin(bus, m); |
2407 | if (r != 0) | |
affff0b6 LP |
2408 | goto finish; |
2409 | ||
2410 | r = bus_process_object(bus, m); | |
a652755d | 2411 | |
affff0b6 | 2412 | finish: |
19befb2d | 2413 | bus->current_message = NULL; |
affff0b6 | 2414 | return r; |
29ddb38f | 2415 | } |
88fe224c | 2416 | |
8f8f05a9 LP |
2417 | static int dispatch_track(sd_bus *bus) { |
2418 | assert(bus); | |
2419 | ||
2420 | if (!bus->track_queue) | |
2421 | return 0; | |
2422 | ||
2423 | bus_track_dispatch(bus->track_queue); | |
2424 | return 1; | |
2425 | } | |
2426 | ||
766c5809 | 2427 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
992c052c | 2428 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
29ddb38f | 2429 | int r; |
a652755d | 2430 | |
29ddb38f | 2431 | assert(bus); |
992c052c | 2432 | assert(bus->state == BUS_RUNNING || bus->state == BUS_HELLO); |
7286037f | 2433 | |
992c052c LP |
2434 | r = process_timeout(bus); |
2435 | if (r != 0) | |
2436 | goto null_message; | |
7286037f | 2437 | |
992c052c LP |
2438 | r = dispatch_wqueue(bus); |
2439 | if (r != 0) | |
2440 | goto null_message; | |
7286037f | 2441 | |
8f8f05a9 LP |
2442 | r = dispatch_track(bus); |
2443 | if (r != 0) | |
2444 | goto null_message; | |
2445 | ||
766c5809 | 2446 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2447 | if (r < 0) |
2448 | return r; | |
2449 | if (!m) | |
2450 | goto null_message; | |
7286037f | 2451 | |
992c052c LP |
2452 | r = process_message(bus, m); |
2453 | if (r != 0) | |
2454 | goto null_message; | |
7286037f | 2455 | |
992c052c LP |
2456 | if (ret) { |
2457 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2458 | if (r < 0) |
2459 | return r; | |
e3017af9 | 2460 | |
992c052c LP |
2461 | *ret = m; |
2462 | m = NULL; | |
2463 | return 1; | |
2464 | } | |
a652755d | 2465 | |
40ca29a1 | 2466 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2467 | |
dc74ce9b LP |
2468 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2469 | strna(sd_bus_message_get_sender(m)), | |
2470 | strna(sd_bus_message_get_path(m)), | |
2471 | strna(sd_bus_message_get_interface(m)), | |
2472 | strna(sd_bus_message_get_member(m))); | |
2473 | ||
992c052c | 2474 | r = sd_bus_reply_method_errorf( |
df2d202e | 2475 | m, |
40ca29a1 | 2476 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2477 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2478 | if (r < 0) |
2479 | return r; | |
2480 | } | |
e3017af9 | 2481 | |
992c052c | 2482 | return 1; |
0a72c2bd | 2483 | |
992c052c LP |
2484 | null_message: |
2485 | if (r >= 0 && ret) | |
2486 | *ret = NULL; | |
0a72c2bd | 2487 | |
992c052c | 2488 | return r; |
29ddb38f | 2489 | } |
0a72c2bd | 2490 | |
718db961 LP |
2491 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2492 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
2493 | struct reply_callback *c; | |
2494 | int r; | |
2495 | ||
2496 | assert(bus); | |
2497 | assert(bus->state == BUS_CLOSING); | |
2498 | ||
2499 | c = hashmap_first(bus->reply_callbacks); | |
2500 | if (c) { | |
ebcf1f97 | 2501 | _cleanup_bus_error_free_ sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 2502 | sd_bus_slot *slot; |
ebcf1f97 | 2503 | |
718db961 LP |
2504 | /* First, fail all outstanding method calls */ |
2505 | r = bus_message_new_synthetic_error( | |
2506 | bus, | |
693eb9a2 | 2507 | c->cookie, |
14c24659 | 2508 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), |
718db961 LP |
2509 | &m); |
2510 | if (r < 0) | |
2511 | return r; | |
2512 | ||
7adc46fc | 2513 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2514 | if (r < 0) |
2515 | return r; | |
2516 | ||
19befb2d | 2517 | if (c->timeout != 0) { |
718db961 | 2518 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
19befb2d LP |
2519 | c->timeout = 0; |
2520 | } | |
718db961 | 2521 | |
693eb9a2 | 2522 | hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2523 | c->cookie = 0; |
2524 | ||
1b64f838 | 2525 | slot = container_of(c, sd_bus_slot, reply_callback); |
718db961 | 2526 | |
718db961 LP |
2527 | bus->iteration_counter++; |
2528 | ||
1b64f838 LP |
2529 | bus->current_message = m; |
2530 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2531 | bus->current_handler = c->callback; |
2532 | bus->current_userdata = slot->userdata; | |
1b64f838 | 2533 | r = c->callback(bus, m, slot->userdata, &error_buffer); |
caa82984 LP |
2534 | bus->current_userdata = NULL; |
2535 | bus->current_handler = NULL; | |
d974ad05 | 2536 | bus->current_slot = NULL; |
1b64f838 LP |
2537 | bus->current_message = NULL; |
2538 | ||
2539 | if (slot->floating) { | |
2540 | bus_slot_disconnect(slot); | |
2541 | sd_bus_slot_unref(slot); | |
2542 | } | |
718db961 | 2543 | |
d974ad05 DH |
2544 | sd_bus_slot_unref(slot); |
2545 | ||
1b64f838 | 2546 | return bus_maybe_reply_error(m, r, &error_buffer); |
718db961 LP |
2547 | } |
2548 | ||
2549 | /* Then, synthesize a Disconnected message */ | |
2550 | r = sd_bus_message_new_signal( | |
2551 | bus, | |
151b9b96 | 2552 | &m, |
718db961 LP |
2553 | "/org/freedesktop/DBus/Local", |
2554 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2555 | "Disconnected"); |
718db961 LP |
2556 | if (r < 0) |
2557 | return r; | |
2558 | ||
34a2c9e8 LP |
2559 | m->sender = "org.freedesktop.DBus.Local"; |
2560 | ||
7adc46fc | 2561 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2562 | if (r < 0) |
2563 | return r; | |
2564 | ||
2565 | sd_bus_close(bus); | |
2566 | ||
19befb2d | 2567 | bus->current_message = m; |
718db961 LP |
2568 | bus->iteration_counter++; |
2569 | ||
2570 | r = process_filter(bus, m); | |
2571 | if (r != 0) | |
2572 | goto finish; | |
2573 | ||
2574 | r = process_match(bus, m); | |
2575 | if (r != 0) | |
2576 | goto finish; | |
2577 | ||
2578 | if (ret) { | |
2579 | *ret = m; | |
2580 | m = NULL; | |
2581 | } | |
2582 | ||
2583 | r = 1; | |
2584 | ||
2585 | finish: | |
19befb2d LP |
2586 | bus->current_message = NULL; |
2587 | ||
718db961 LP |
2588 | return r; |
2589 | } | |
2590 | ||
766c5809 | 2591 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2592 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2593 | int r; |
0a72c2bd | 2594 | |
992c052c LP |
2595 | /* Returns 0 when we didn't do anything. This should cause the |
2596 | * caller to invoke sd_bus_wait() before returning the next | |
2597 | * time. Returns > 0 when we did something, which possibly | |
2598 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2599 | |
d6888822 LP |
2600 | assert_return(bus, -EINVAL); |
2601 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2602 | |
992c052c | 2603 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2604 | assert_return(!bus->current_message, -EBUSY); |
2605 | assert(!bus->current_slot); | |
0a72c2bd | 2606 | |
992c052c | 2607 | switch (bus->state) { |
0a72c2bd | 2608 | |
992c052c | 2609 | case BUS_UNSET: |
992c052c | 2610 | return -ENOTCONN; |
0a72c2bd | 2611 | |
6d6f4904 LP |
2612 | case BUS_CLOSED: |
2613 | return -ECONNRESET; | |
2614 | ||
992c052c LP |
2615 | case BUS_OPENING: |
2616 | r = bus_socket_process_opening(bus); | |
441d56a1 | 2617 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2618 | bus_enter_closing(bus); |
2619 | r = 1; | |
2620 | } else if (r < 0) | |
29ddb38f | 2621 | return r; |
992c052c LP |
2622 | if (ret) |
2623 | *ret = NULL; | |
a652755d LP |
2624 | return r; |
2625 | ||
992c052c | 2626 | case BUS_AUTHENTICATING: |
992c052c | 2627 | r = bus_socket_process_authenticating(bus); |
441d56a1 | 2628 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2629 | bus_enter_closing(bus); |
2630 | r = 1; | |
2631 | } else if (r < 0) | |
29ddb38f | 2632 | return r; |
718db961 | 2633 | |
992c052c LP |
2634 | if (ret) |
2635 | *ret = NULL; | |
718db961 | 2636 | |
992c052c | 2637 | return r; |
a652755d | 2638 | |
992c052c LP |
2639 | case BUS_RUNNING: |
2640 | case BUS_HELLO: | |
766c5809 | 2641 | r = process_running(bus, hint_priority, priority, ret); |
441d56a1 | 2642 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
718db961 LP |
2643 | bus_enter_closing(bus); |
2644 | r = 1; | |
2645 | ||
2646 | if (ret) | |
2647 | *ret = NULL; | |
2648 | } | |
43a43f50 | 2649 | |
43a43f50 | 2650 | return r; |
718db961 LP |
2651 | |
2652 | case BUS_CLOSING: | |
2653 | return process_closing(bus, ret); | |
992c052c | 2654 | } |
43a43f50 | 2655 | |
992c052c | 2656 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2657 | } |
2658 | ||
766c5809 LP |
2659 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2660 | return bus_process_internal(bus, false, 0, ret); | |
2661 | } | |
2662 | ||
2663 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2664 | return bus_process_internal(bus, true, priority, ret); | |
2665 | } | |
2666 | ||
992c052c LP |
2667 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2668 | struct pollfd p[2] = {}; | |
2669 | int r, e, n; | |
2670 | struct timespec ts; | |
3a43da28 | 2671 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2672 | |
2673 | assert(bus); | |
718db961 LP |
2674 | |
2675 | if (bus->state == BUS_CLOSING) | |
2676 | return 1; | |
2677 | ||
a3d59cd1 LP |
2678 | if (!BUS_IS_OPEN(bus->state)) |
2679 | return -ENOTCONN; | |
adcdb374 | 2680 | |
992c052c LP |
2681 | e = sd_bus_get_events(bus); |
2682 | if (e < 0) | |
2683 | return e; | |
adcdb374 | 2684 | |
992c052c | 2685 | if (need_more) |
8efd6381 LP |
2686 | /* The caller really needs some more data, he doesn't |
2687 | * care about what's already read, or any timeouts | |
2688 | * except its own.*/ | |
992c052c | 2689 | e |= POLLIN; |
992c052c | 2690 | else { |
8efd6381 LP |
2691 | usec_t until; |
2692 | /* The caller wants to process if there's something to | |
2693 | * process, but doesn't care otherwise */ | |
2694 | ||
2695 | r = sd_bus_get_timeout(bus, &until); | |
2696 | if (r < 0) | |
2697 | return r; | |
2698 | if (r > 0) { | |
2699 | usec_t nw; | |
2700 | nw = now(CLOCK_MONOTONIC); | |
2701 | m = until > nw ? until - nw : 0; | |
2702 | } | |
992c052c | 2703 | } |
adcdb374 | 2704 | |
992c052c LP |
2705 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2706 | m = timeout_usec; | |
adcdb374 | 2707 | |
992c052c LP |
2708 | p[0].fd = bus->input_fd; |
2709 | if (bus->output_fd == bus->input_fd) { | |
2710 | p[0].events = e; | |
2711 | n = 1; | |
2712 | } else { | |
2713 | p[0].events = e & POLLIN; | |
2714 | p[1].fd = bus->output_fd; | |
2715 | p[1].events = e & POLLOUT; | |
2716 | n = 2; | |
adcdb374 LP |
2717 | } |
2718 | ||
992c052c | 2719 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2720 | if (r < 0) |
992c052c | 2721 | return -errno; |
adcdb374 | 2722 | |
992c052c | 2723 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2724 | } |
2725 | ||
d9f644e2 | 2726 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2727 | |
d6888822 | 2728 | assert_return(bus, -EINVAL); |
d6888822 | 2729 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2730 | |
718db961 LP |
2731 | if (bus->state == BUS_CLOSING) |
2732 | return 0; | |
2733 | ||
a3d59cd1 LP |
2734 | if (!BUS_IS_OPEN(bus->state)) |
2735 | return -ENOTCONN; | |
718db961 | 2736 | |
992c052c LP |
2737 | if (bus->rqueue_size > 0) |
2738 | return 0; | |
9db76355 | 2739 | |
992c052c LP |
2740 | return bus_poll(bus, false, timeout_usec); |
2741 | } | |
9db76355 | 2742 | |
d9f644e2 | 2743 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2744 | int r; |
9db76355 | 2745 | |
d6888822 | 2746 | assert_return(bus, -EINVAL); |
d6888822 | 2747 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2748 | |
718db961 LP |
2749 | if (bus->state == BUS_CLOSING) |
2750 | return 0; | |
2751 | ||
a3d59cd1 LP |
2752 | if (!BUS_IS_OPEN(bus->state)) |
2753 | return -ENOTCONN; | |
718db961 | 2754 | |
992c052c LP |
2755 | r = bus_ensure_running(bus); |
2756 | if (r < 0) | |
2757 | return r; | |
9db76355 | 2758 | |
992c052c LP |
2759 | if (bus->wqueue_size <= 0) |
2760 | return 0; | |
9db76355 | 2761 | |
992c052c LP |
2762 | for (;;) { |
2763 | r = dispatch_wqueue(bus); | |
32f46480 | 2764 | if (r < 0) { |
441d56a1 | 2765 | if (r == -ENOTCONN || r == -ECONNRESET || r == -EPIPE || r == -ESHUTDOWN) { |
32f46480 | 2766 | bus_enter_closing(bus); |
441d56a1 LP |
2767 | return -ECONNRESET; |
2768 | } | |
32f46480 | 2769 | |
9db76355 | 2770 | return r; |
32f46480 | 2771 | } |
9db76355 | 2772 | |
992c052c LP |
2773 | if (bus->wqueue_size <= 0) |
2774 | return 0; | |
9db76355 | 2775 | |
992c052c | 2776 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2777 | if (r < 0) |
2778 | return r; | |
9db76355 | 2779 | } |
9db76355 LP |
2780 | } |
2781 | ||
19befb2d LP |
2782 | _public_ int sd_bus_add_filter( |
2783 | sd_bus *bus, | |
2784 | sd_bus_slot **slot, | |
2785 | sd_bus_message_handler_t callback, | |
2786 | void *userdata) { | |
d9f644e2 | 2787 | |
19befb2d | 2788 | sd_bus_slot *s; |
de1c301e | 2789 | |
d6888822 LP |
2790 | assert_return(bus, -EINVAL); |
2791 | assert_return(callback, -EINVAL); | |
2792 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2793 | |
19befb2d LP |
2794 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2795 | if (!s) | |
29ddb38f LP |
2796 | return -ENOMEM; |
2797 | ||
19befb2d | 2798 | s->filter_callback.callback = callback; |
a652755d | 2799 | |
19befb2d LP |
2800 | bus->filter_callbacks_modified = true; |
2801 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2802 | |
19befb2d LP |
2803 | if (slot) |
2804 | *slot = s; | |
29ddb38f | 2805 | |
992c052c | 2806 | return 0; |
a652755d | 2807 | } |
392d5b37 | 2808 | |
19befb2d LP |
2809 | _public_ int sd_bus_add_match( |
2810 | sd_bus *bus, | |
2811 | sd_bus_slot **slot, | |
2812 | const char *match, | |
2813 | sd_bus_message_handler_t callback, | |
2814 | void *userdata) { | |
d9f644e2 | 2815 | |
992c052c LP |
2816 | struct bus_match_component *components = NULL; |
2817 | unsigned n_components = 0; | |
2915234d | 2818 | sd_bus_slot *s = NULL; |
992c052c | 2819 | int r = 0; |
392d5b37 | 2820 | |
d6888822 LP |
2821 | assert_return(bus, -EINVAL); |
2822 | assert_return(match, -EINVAL); | |
2823 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2824 | |
992c052c LP |
2825 | r = bus_match_parse(match, &components, &n_components); |
2826 | if (r < 0) | |
2827 | goto finish; | |
29ddb38f | 2828 | |
19befb2d LP |
2829 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2830 | if (!s) { | |
2831 | r = -ENOMEM; | |
2832 | goto finish; | |
2833 | } | |
2834 | ||
2835 | s->match_callback.callback = callback; | |
2836 | s->match_callback.cookie = ++bus->match_cookie; | |
2837 | ||
992c052c | 2838 | if (bus->bus_client) { |
29ddb38f | 2839 | |
19befb2d LP |
2840 | if (!bus->is_kernel) { |
2841 | /* When this is not a kernel transport, we | |
2842 | * store the original match string, so that we | |
2843 | * can use it to remove the match again */ | |
2844 | ||
2845 | s->match_callback.match_string = strdup(match); | |
2846 | if (!s->match_callback.match_string) { | |
2847 | r = -ENOMEM; | |
2848 | goto finish; | |
2849 | } | |
2850 | } | |
2851 | ||
2852 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components, s->match_callback.cookie); | |
992c052c LP |
2853 | if (r < 0) |
2854 | goto finish; | |
392d5b37 LP |
2855 | } |
2856 | ||
992c052c | 2857 | bus->match_callbacks_modified = true; |
19befb2d LP |
2858 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2859 | if (r < 0) | |
2860 | goto finish; | |
2861 | ||
2862 | if (slot) | |
2863 | *slot = s; | |
2864 | s = NULL; | |
917b5dc7 | 2865 | |
992c052c LP |
2866 | finish: |
2867 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2868 | sd_bus_slot_unref(s); |
2869 | ||
992c052c | 2870 | return r; |
917b5dc7 LP |
2871 | } |
2872 | ||
19befb2d LP |
2873 | int bus_remove_match_by_string( |
2874 | sd_bus *bus, | |
2875 | const char *match, | |
2876 | sd_bus_message_handler_t callback, | |
2877 | void *userdata) { | |
d9f644e2 | 2878 | |
992c052c LP |
2879 | struct bus_match_component *components = NULL; |
2880 | unsigned n_components = 0; | |
19befb2d LP |
2881 | struct match_callback *c; |
2882 | int r = 0; | |
917b5dc7 | 2883 | |
d6888822 LP |
2884 | assert_return(bus, -EINVAL); |
2885 | assert_return(match, -EINVAL); | |
2886 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2887 | |
992c052c | 2888 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 2889 | if (r < 0) |
19befb2d | 2890 | goto finish; |
f10dda3b | 2891 | |
19befb2d LP |
2892 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
2893 | if (r <= 0) | |
2894 | goto finish; | |
f10dda3b | 2895 | |
19befb2d | 2896 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 2897 | |
19befb2d | 2898 | finish: |
992c052c | 2899 | bus_match_parse_free(components, n_components); |
f10dda3b | 2900 | |
19befb2d | 2901 | return r; |
f10dda3b LP |
2902 | } |
2903 | ||
992c052c LP |
2904 | bool bus_pid_changed(sd_bus *bus) { |
2905 | assert(bus); | |
f10dda3b | 2906 | |
992c052c LP |
2907 | /* We don't support people creating a bus connection and |
2908 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2909 | |
992c052c | 2910 | return bus->original_pid != getpid(); |
d5a2b9a6 | 2911 | } |
40ca29a1 LP |
2912 | |
2913 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2914 | sd_bus *bus = userdata; |
40ca29a1 LP |
2915 | int r; |
2916 | ||
2917 | assert(bus); | |
2918 | ||
2919 | r = sd_bus_process(bus, NULL); | |
2920 | if (r < 0) | |
2921 | return r; | |
2922 | ||
2923 | return 1; | |
2924 | } | |
2925 | ||
2926 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2927 | sd_bus *bus = userdata; |
40ca29a1 LP |
2928 | int r; |
2929 | ||
2930 | assert(bus); | |
2931 | ||
2932 | r = sd_bus_process(bus, NULL); | |
2933 | if (r < 0) | |
2934 | return r; | |
2935 | ||
2936 | return 1; | |
2937 | } | |
2938 | ||
2939 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2940 | sd_bus *bus = userdata; | |
2941 | int r, e; | |
2942 | usec_t until; | |
2943 | ||
2944 | assert(s); | |
2945 | assert(bus); | |
2946 | ||
2947 | e = sd_bus_get_events(bus); | |
2948 | if (e < 0) | |
2949 | return e; | |
2950 | ||
2951 | if (bus->output_fd != bus->input_fd) { | |
2952 | ||
2953 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2954 | if (r < 0) | |
2955 | return r; | |
2956 | ||
2957 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2958 | if (r < 0) | |
2959 | return r; | |
2960 | } else { | |
2961 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2962 | if (r < 0) | |
2963 | return r; | |
2964 | } | |
2965 | ||
2966 | r = sd_bus_get_timeout(bus, &until); | |
2967 | if (r < 0) | |
2968 | return r; | |
2969 | if (r > 0) { | |
2970 | int j; | |
2971 | ||
2972 | j = sd_event_source_set_time(bus->time_event_source, until); | |
2973 | if (j < 0) | |
2974 | return j; | |
2975 | } | |
2976 | ||
2977 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
2978 | if (r < 0) | |
2979 | return r; | |
2980 | ||
2981 | return 1; | |
2982 | } | |
2983 | ||
abc5fe72 LP |
2984 | static int quit_callback(sd_event_source *event, void *userdata) { |
2985 | sd_bus *bus = userdata; | |
2986 | ||
2987 | assert(event); | |
2988 | ||
2989 | sd_bus_flush(bus); | |
7bb4d371 | 2990 | sd_bus_close(bus); |
abc5fe72 LP |
2991 | |
2992 | return 1; | |
2993 | } | |
2994 | ||
1e05d493 LP |
2995 | static int attach_io_events(sd_bus *bus) { |
2996 | int r; | |
2997 | ||
2998 | assert(bus); | |
2999 | ||
3000 | if (bus->input_fd < 0) | |
3001 | return 0; | |
3002 | ||
3003 | if (!bus->event) | |
3004 | return 0; | |
3005 | ||
3006 | if (!bus->input_io_event_source) { | |
151b9b96 | 3007 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3008 | if (r < 0) |
3009 | return r; | |
3010 | ||
3011 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3012 | if (r < 0) | |
3013 | return r; | |
3014 | ||
3015 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3016 | if (r < 0) |
3017 | return r; | |
3018 | ||
3019 | r = sd_event_source_set_name(bus->input_io_event_source, "bus-input"); | |
1e05d493 LP |
3020 | } else |
3021 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3022 | ||
3023 | if (r < 0) | |
3024 | return r; | |
3025 | ||
3026 | if (bus->output_fd != bus->input_fd) { | |
3027 | assert(bus->output_fd >= 0); | |
3028 | ||
3029 | if (!bus->output_io_event_source) { | |
151b9b96 | 3030 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3031 | if (r < 0) |
3032 | return r; | |
3033 | ||
3034 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3035 | if (r < 0) |
3036 | return r; | |
3037 | ||
3038 | r = sd_event_source_set_name(bus->input_io_event_source, "bus-output"); | |
1e05d493 LP |
3039 | } else |
3040 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3041 | ||
3042 | if (r < 0) | |
3043 | return r; | |
3044 | } | |
3045 | ||
3046 | return 0; | |
3047 | } | |
3048 | ||
3049 | static void detach_io_events(sd_bus *bus) { | |
3050 | assert(bus); | |
3051 | ||
3052 | if (bus->input_io_event_source) { | |
3053 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3054 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3055 | } | |
3056 | ||
3057 | if (bus->output_io_event_source) { | |
3058 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3059 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3060 | } | |
3061 | } | |
3062 | ||
d9f644e2 | 3063 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3064 | int r; |
3065 | ||
3066 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3067 | assert_return(!bus->event, -EBUSY); |
3068 | ||
3069 | assert(!bus->input_io_event_source); | |
3070 | assert(!bus->output_io_event_source); | |
3071 | assert(!bus->time_event_source); | |
3072 | ||
76b54375 LP |
3073 | if (event) |
3074 | bus->event = sd_event_ref(event); | |
3075 | else { | |
3076 | r = sd_event_default(&bus->event); | |
3077 | if (r < 0) | |
3078 | return r; | |
3079 | } | |
40ca29a1 | 3080 | |
1e05d493 | 3081 | bus->event_priority = priority; |
40ca29a1 | 3082 | |
6a0f1f6d | 3083 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3084 | if (r < 0) |
3085 | goto fail; | |
3086 | ||
3087 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3088 | if (r < 0) | |
3089 | goto fail; | |
3090 | ||
9021bb9f TG |
3091 | r = sd_event_source_set_name(bus->time_event_source, "bus-time"); |
3092 | if (r < 0) | |
3093 | goto fail; | |
3094 | ||
151b9b96 | 3095 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3096 | if (r < 0) |
3097 | goto fail; | |
3098 | ||
9021bb9f TG |
3099 | r = sd_event_source_set_name(bus->quit_event_source, "bus-exit"); |
3100 | if (r < 0) | |
3101 | goto fail; | |
3102 | ||
1e05d493 LP |
3103 | r = attach_io_events(bus); |
3104 | if (r < 0) | |
3105 | goto fail; | |
3106 | ||
40ca29a1 LP |
3107 | return 0; |
3108 | ||
3109 | fail: | |
3110 | sd_bus_detach_event(bus); | |
3111 | return r; | |
3112 | } | |
3113 | ||
d9f644e2 | 3114 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3115 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3116 | |
3117 | if (!bus->event) | |
3118 | return 0; | |
40ca29a1 | 3119 | |
1e05d493 | 3120 | detach_io_events(bus); |
40ca29a1 | 3121 | |
86befb40 LP |
3122 | if (bus->time_event_source) { |
3123 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3124 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3125 | } |
40ca29a1 | 3126 | |
86befb40 LP |
3127 | if (bus->quit_event_source) { |
3128 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3129 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3130 | } |
abc5fe72 | 3131 | |
93f1bcf4 | 3132 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3133 | return 1; |
40ca29a1 | 3134 | } |
affff0b6 | 3135 | |
2be44176 LP |
3136 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3137 | assert_return(bus, NULL); | |
3138 | ||
3139 | return bus->event; | |
3140 | } | |
3141 | ||
19befb2d LP |
3142 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3143 | assert_return(bus, NULL); | |
3144 | ||
3145 | return bus->current_message; | |
3146 | } | |
3147 | ||
3148 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3149 | assert_return(bus, NULL); |
3150 | ||
19befb2d | 3151 | return bus->current_slot; |
affff0b6 | 3152 | } |
76b54375 | 3153 | |
caa82984 LP |
3154 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3155 | assert_return(bus, NULL); | |
3156 | ||
3157 | return bus->current_handler; | |
3158 | } | |
3159 | ||
3160 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3161 | assert_return(bus, NULL); | |
3162 | ||
3163 | return bus->current_userdata; | |
3164 | } | |
3165 | ||
76b54375 LP |
3166 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3167 | sd_bus *b = NULL; | |
3168 | int r; | |
3169 | ||
3170 | assert(bus_open); | |
3171 | assert(default_bus); | |
3172 | ||
3173 | if (!ret) | |
3174 | return !!*default_bus; | |
3175 | ||
3176 | if (*default_bus) { | |
3177 | *ret = sd_bus_ref(*default_bus); | |
3178 | return 0; | |
3179 | } | |
3180 | ||
3181 | r = bus_open(&b); | |
3182 | if (r < 0) | |
3183 | return r; | |
3184 | ||
3185 | b->default_bus_ptr = default_bus; | |
3186 | b->tid = gettid(); | |
3187 | *default_bus = b; | |
3188 | ||
3189 | *ret = b; | |
3190 | return 1; | |
3191 | } | |
3192 | ||
3193 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
ec202eae | 3194 | static thread_local sd_bus *default_system_bus = NULL; |
76b54375 LP |
3195 | |
3196 | return bus_default(sd_bus_open_system, &default_system_bus, ret); | |
3197 | } | |
3198 | ||
3199 | _public_ int sd_bus_default_user(sd_bus **ret) { | |
ec202eae | 3200 | static thread_local sd_bus *default_user_bus = NULL; |
76b54375 LP |
3201 | |
3202 | return bus_default(sd_bus_open_user, &default_user_bus, ret); | |
3203 | } | |
3204 | ||
af08d2f9 LP |
3205 | _public_ int sd_bus_default(sd_bus **ret) { |
3206 | ||
3207 | const char *e; | |
3208 | ||
3209 | /* Let's try our best to reuse another cached connection. If | |
3210 | * the starter bus type is set, connect via our normal | |
3211 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
3212 | * we can share the connection with the user/system default | |
3213 | * bus. */ | |
3214 | ||
3215 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
3216 | if (e) { | |
3217 | if (streq(e, "system")) | |
3218 | return sd_bus_default_system(ret); | |
09365592 | 3219 | else if (STR_IN_SET(e, "user", "session")) |
af08d2f9 LP |
3220 | return sd_bus_default_user(ret); |
3221 | } | |
3222 | ||
3223 | /* No type is specified, so we have not other option than to | |
3224 | * use the starter address if it is set. */ | |
3225 | ||
3226 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
3227 | if (e) { | |
3228 | static thread_local sd_bus *default_starter_bus = NULL; | |
3229 | ||
3230 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3231 | } | |
3232 | ||
3233 | /* Finally, if nothing is set use the cached connection for | |
3234 | * the right scope */ | |
3235 | ||
3236 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3237 | return sd_bus_default_user(ret); | |
3238 | else | |
3239 | return sd_bus_default_system(ret); | |
3240 | } | |
3241 | ||
76b54375 LP |
3242 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3243 | assert_return(b, -EINVAL); | |
3244 | assert_return(tid, -EINVAL); | |
3245 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3246 | ||
3247 | if (b->tid != 0) { | |
3248 | *tid = b->tid; | |
3249 | return 0; | |
3250 | } | |
3251 | ||
3252 | if (b->event) | |
3253 | return sd_event_get_tid(b->event, tid); | |
3254 | ||
3255 | return -ENXIO; | |
3256 | } | |
28383ba1 | 3257 | |
a6278b88 LP |
3258 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3259 | _cleanup_free_ char *e = NULL; | |
3260 | char *ret; | |
3261 | ||
3262 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3263 | assert_return(external_id, -EINVAL); | |
3264 | assert_return(ret_path, -EINVAL); | |
3265 | ||
3266 | e = bus_label_escape(external_id); | |
3267 | if (!e) | |
3268 | return -ENOMEM; | |
3269 | ||
3270 | ret = strjoin(prefix, "/", e, NULL); | |
3271 | if (!ret) | |
3272 | return -ENOMEM; | |
3273 | ||
3274 | *ret_path = ret; | |
3275 | return 0; | |
28383ba1 LP |
3276 | } |
3277 | ||
a6278b88 LP |
3278 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3279 | const char *e; | |
3280 | char *ret; | |
3281 | ||
3282 | assert_return(object_path_is_valid(path), -EINVAL); | |
3283 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3284 | assert_return(external_id, -EINVAL); | |
3285 | ||
3286 | e = object_path_startswith(path, prefix); | |
3287 | if (!e) { | |
3288 | *external_id = NULL; | |
3289 | return 0; | |
3290 | } | |
3291 | ||
3292 | ret = bus_label_unescape(e); | |
3293 | if (!ret) | |
3294 | return -ENOMEM; | |
3295 | ||
3296 | *external_id = ret; | |
3297 | return 1; | |
28383ba1 | 3298 | } |
5b12334d LP |
3299 | |
3300 | _public_ int sd_bus_get_peer_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { | |
3301 | sd_bus_creds *c; | |
3302 | pid_t pid = 0; | |
3303 | int r; | |
3304 | ||
3305 | assert_return(bus, -EINVAL); | |
95c4fe82 | 3306 | assert_return(mask <= _SD_BUS_CREDS_ALL, -ENOTSUP); |
5b12334d | 3307 | assert_return(ret, -EINVAL); |
5b12334d | 3308 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 | 3309 | |
e955c458 | 3310 | if (bus->is_kernel) |
a3d59cd1 LP |
3311 | return -ENOTSUP; |
3312 | ||
3313 | if (!BUS_IS_OPEN(bus->state)) | |
3314 | return -ENOTCONN; | |
5b12334d LP |
3315 | |
3316 | if (!bus->ucred_valid && !isempty(bus->label)) | |
3317 | return -ENODATA; | |
3318 | ||
3319 | c = bus_creds_new(); | |
3320 | if (!c) | |
3321 | return -ENOMEM; | |
3322 | ||
3323 | if (bus->ucred_valid) { | |
3324 | pid = c->pid = bus->ucred.pid; | |
3325 | c->uid = bus->ucred.uid; | |
3326 | c->gid = bus->ucred.gid; | |
3327 | ||
3310dfd5 | 3328 | c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask; |
5b12334d LP |
3329 | } |
3330 | ||
3331 | if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) { | |
3332 | c->label = strdup(bus->label); | |
3333 | if (!c->label) { | |
3334 | sd_bus_creds_unref(c); | |
3335 | return -ENOMEM; | |
3336 | } | |
3337 | ||
3310dfd5 | 3338 | c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; |
5b12334d LP |
3339 | } |
3340 | ||
3341 | r = bus_creds_add_more(c, mask, pid, 0); | |
3342 | if (r < 0) | |
3343 | return r; | |
3344 | ||
3345 | *ret = c; | |
3346 | return 0; | |
3347 | } | |
ae095f86 LP |
3348 | |
3349 | _public_ int sd_bus_try_close(sd_bus *bus) { | |
3350 | int r; | |
3351 | ||
3352 | assert_return(bus, -EINVAL); | |
ae095f86 | 3353 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 LP |
3354 | |
3355 | if (!bus->is_kernel) | |
3356 | return -ENOTSUP; | |
3357 | ||
3358 | if (!BUS_IS_OPEN(bus->state)) | |
3359 | return -ENOTCONN; | |
ae095f86 | 3360 | |
bd746b8b LP |
3361 | if (bus->rqueue_size > 0) |
3362 | return -EBUSY; | |
3363 | ||
14f862a5 LP |
3364 | if (bus->wqueue_size > 0) |
3365 | return -EBUSY; | |
3366 | ||
ae095f86 LP |
3367 | r = bus_kernel_try_close(bus); |
3368 | if (r < 0) | |
3369 | return r; | |
3370 | ||
3371 | sd_bus_close(bus); | |
3372 | return 0; | |
3373 | } | |
5972fe95 LP |
3374 | |
3375 | _public_ int sd_bus_get_name(sd_bus *bus, const char **name) { | |
3376 | assert_return(bus, -EINVAL); | |
3377 | assert_return(name, -EINVAL); | |
3378 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3379 | ||
3380 | *name = bus->connection_name; | |
3381 | return 0; | |
3382 | } | |
fe3f22d1 DK |
3383 | |
3384 | int bus_get_root_path(sd_bus *bus) { | |
3385 | int r; | |
3386 | ||
3387 | if (bus->cgroup_root) | |
3388 | return 0; | |
3389 | ||
3390 | r = cg_get_root_path(&bus->cgroup_root); | |
3391 | if (r == -ENOENT) { | |
3392 | bus->cgroup_root = strdup("/"); | |
3393 | if (!bus->cgroup_root) | |
3394 | return -ENOMEM; | |
3395 | ||
3396 | r = 0; | |
3397 | } | |
3398 | ||
3399 | return r; | |
3400 | } |