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