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Commit | Line | Data |
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de1c301e LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2013 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <endian.h> | |
de1c301e | 21 | #include <netdb.h> |
0a6f50c0 | 22 | #include <poll.h> |
45fbe937 | 23 | #include <pthread.h> |
cf0fbc49 TA |
24 | #include <stdlib.h> |
25 | #include <sys/mman.h> | |
26 | #include <unistd.h> | |
de1c301e | 27 | |
de1c301e | 28 | #include "sd-bus.h" |
07630cea | 29 | |
b5efdb8a | 30 | #include "alloc-util.h" |
07630cea LP |
31 | #include "bus-container.h" |
32 | #include "bus-control.h" | |
de1c301e | 33 | #include "bus-internal.h" |
6629161f | 34 | #include "bus-kernel.h" |
07630cea LP |
35 | #include "bus-label.h" |
36 | #include "bus-message.h" | |
992c052c | 37 | #include "bus-objects.h" |
0461f8cd | 38 | #include "bus-protocol.h" |
19befb2d | 39 | #include "bus-slot.h" |
07630cea LP |
40 | #include "bus-socket.h" |
41 | #include "bus-track.h" | |
42 | #include "bus-type.h" | |
43 | #include "bus-util.h" | |
44 | #include "cgroup-util.h" | |
45 | #include "def.h" | |
3ffd4af2 | 46 | #include "fd-util.h" |
cf0fbc49 | 47 | #include "hexdecoct.h" |
07630cea LP |
48 | #include "hostname-util.h" |
49 | #include "macro.h" | |
50 | #include "missing.h" | |
6bedfcbb | 51 | #include "parse-util.h" |
07630cea LP |
52 | #include "string-util.h" |
53 | #include "strv.h" | |
54 | #include "util.h" | |
de1c301e | 55 | |
b56c4604 LP |
56 | #define log_debug_bus_message(m) \ |
57 | do { \ | |
58 | sd_bus_message *_mm = (m); \ | |
e28d0865 | 59 | log_debug("Got message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error-name=%s error-message=%s", \ |
b56c4604 LP |
60 | bus_message_type_to_string(_mm->header->type), \ |
61 | strna(sd_bus_message_get_sender(_mm)), \ | |
62 | strna(sd_bus_message_get_destination(_mm)), \ | |
63 | strna(sd_bus_message_get_path(_mm)), \ | |
64 | strna(sd_bus_message_get_interface(_mm)), \ | |
65 | strna(sd_bus_message_get_member(_mm)), \ | |
66 | BUS_MESSAGE_COOKIE(_mm), \ | |
67 | _mm->reply_cookie, \ | |
e28d0865 | 68 | strna(_mm->error.name), \ |
b56c4604 LP |
69 | strna(_mm->error.message)); \ |
70 | } while (false) | |
f9f97ca6 | 71 | |
e3017af9 | 72 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
1e05d493 LP |
73 | static int attach_io_events(sd_bus *b); |
74 | static void detach_io_events(sd_bus *b); | |
e3017af9 | 75 | |
fa2f8973 LP |
76 | static thread_local sd_bus *default_system_bus = NULL; |
77 | static thread_local sd_bus *default_user_bus = NULL; | |
78 | static thread_local sd_bus *default_starter_bus = NULL; | |
79 | ||
f54514f3 LP |
80 | static void bus_close_fds(sd_bus *b) { |
81 | assert(b); | |
82 | ||
1e05d493 LP |
83 | detach_io_events(b); |
84 | ||
0fd8d506 | 85 | if (b->input_fd != b->output_fd) |
03e334a1 | 86 | safe_close(b->output_fd); |
0fd8d506 | 87 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
88 | } |
89 | ||
0e586eae | 90 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
91 | assert(b); |
92 | ||
f389bf15 LP |
93 | while (b->rqueue_size > 0) |
94 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
95 | ||
253f96e5 | 96 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 97 | b->rqueue_allocated = 0; |
0e586eae | 98 | |
f389bf15 LP |
99 | while (b->wqueue_size > 0) |
100 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 101 | |
253f96e5 | 102 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 103 | b->wqueue_allocated = 0; |
0e586eae LP |
104 | } |
105 | ||
de1c301e | 106 | static void bus_free(sd_bus *b) { |
19befb2d | 107 | sd_bus_slot *s; |
de1c301e LP |
108 | |
109 | assert(b); | |
8f8f05a9 | 110 | assert(!b->track_queue); |
232f3677 | 111 | assert(!b->tracks); |
8f8f05a9 | 112 | |
19befb2d LP |
113 | b->state = BUS_CLOSED; |
114 | ||
40ca29a1 LP |
115 | sd_bus_detach_event(b); |
116 | ||
19befb2d LP |
117 | while ((s = b->slots)) { |
118 | /* At this point only floating slots can still be | |
119 | * around, because the non-floating ones keep a | |
120 | * reference to the bus, and we thus couldn't be | |
121 | * destructing right now... We forcibly disconnect the | |
122 | * slots here, so that they still can be referenced by | |
123 | * apps, but are dead. */ | |
124 | ||
125 | assert(s->floating); | |
126 | bus_slot_disconnect(s); | |
127 | sd_bus_slot_unref(s); | |
128 | } | |
129 | ||
f4d140e9 LP |
130 | if (b->default_bus_ptr) |
131 | *b->default_bus_ptr = NULL; | |
132 | ||
f54514f3 | 133 | bus_close_fds(b); |
de1c301e | 134 | |
c4e6556c | 135 | free(b->label); |
de1c301e | 136 | free(b->rbuffer); |
89ffcd2a | 137 | free(b->unique_name); |
2181a7f5 | 138 | free(b->auth_buffer); |
89ffcd2a | 139 | free(b->address); |
a7893c6b | 140 | free(b->machine); |
751bc6ac | 141 | free(b->cgroup_root); |
455971c1 | 142 | free(b->description); |
89ffcd2a | 143 | |
2fd9ae2e LP |
144 | free(b->exec_path); |
145 | strv_free(b->exec_argv); | |
146 | ||
2c93b4ef LP |
147 | close_many(b->fds, b->n_fds); |
148 | free(b->fds); | |
149 | ||
0e586eae | 150 | bus_reset_queues(b); |
de1c301e | 151 | |
c9fe4af7 | 152 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 153 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 154 | |
75a0da95 | 155 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
156 | bus_match_free(&b->match_callbacks); |
157 | ||
29ddb38f LP |
158 | hashmap_free_free(b->vtable_methods); |
159 | hashmap_free_free(b->vtable_properties); | |
160 | ||
19befb2d | 161 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
162 | hashmap_free(b->nodes); |
163 | ||
a132bef0 | 164 | bus_flush_memfd(b); |
bc7fd8cd | 165 | |
45fbe937 LP |
166 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
167 | ||
de1c301e LP |
168 | free(b); |
169 | } | |
170 | ||
d9f644e2 | 171 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
172 | sd_bus *r; |
173 | ||
d6888822 | 174 | assert_return(ret, -EINVAL); |
021a1e78 | 175 | |
de1c301e LP |
176 | r = new0(sd_bus, 1); |
177 | if (!r) | |
021a1e78 | 178 | return -ENOMEM; |
de1c301e | 179 | |
e4ee6e5c | 180 | r->n_ref = REFCNT_INIT; |
e82c9509 | 181 | r->input_fd = r->output_fd = -1; |
de1c301e | 182 | r->message_version = 1; |
3310dfd5 | 183 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c32195e0 | 184 | r->hello_flags |= KDBUS_HELLO_ACCEPT_FD; |
d21a7bb1 | 185 | r->attach_flags |= KDBUS_ATTACH_NAMES; |
df0ff127 | 186 | r->original_pid = getpid_cached(); |
de1c301e | 187 | |
45fbe937 LP |
188 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
189 | ||
de1c301e LP |
190 | /* We guarantee that wqueue always has space for at least one |
191 | * entry */ | |
821e0756 | 192 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 193 | free(r); |
021a1e78 | 194 | return -ENOMEM; |
de1c301e LP |
195 | } |
196 | ||
021a1e78 LP |
197 | *ret = r; |
198 | return 0; | |
199 | } | |
200 | ||
d9f644e2 | 201 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
202 | char *a; |
203 | ||
d6888822 LP |
204 | assert_return(bus, -EINVAL); |
205 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
206 | assert_return(address, -EINVAL); | |
207 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
208 | |
209 | a = strdup(address); | |
210 | if (!a) | |
211 | return -ENOMEM; | |
212 | ||
213 | free(bus->address); | |
214 | bus->address = a; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
d9f644e2 | 219 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 LP |
220 | assert_return(bus, -EINVAL); |
221 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
8ac43fee LP |
222 | assert_return(input_fd >= 0, -EBADF); |
223 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 224 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 225 | |
e82c9509 LP |
226 | bus->input_fd = input_fd; |
227 | bus->output_fd = output_fd; | |
021a1e78 LP |
228 | return 0; |
229 | } | |
230 | ||
d9f644e2 | 231 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
232 | char *p, **a; |
233 | ||
d6888822 LP |
234 | assert_return(bus, -EINVAL); |
235 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
236 | assert_return(path, -EINVAL); | |
237 | assert_return(!strv_isempty(argv), -EINVAL); | |
238 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
239 | |
240 | p = strdup(path); | |
241 | if (!p) | |
242 | return -ENOMEM; | |
243 | ||
244 | a = strv_copy(argv); | |
245 | if (!a) { | |
246 | free(p); | |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | free(bus->exec_path); | |
251 | strv_free(bus->exec_argv); | |
252 | ||
253 | bus->exec_path = p; | |
254 | bus->exec_argv = a; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
d9f644e2 | 259 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 LP |
260 | assert_return(bus, -EINVAL); |
261 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
262 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 263 | |
94bbf1ba | 264 | bus->bus_client = !!b; |
021a1e78 LP |
265 | return 0; |
266 | } | |
267 | ||
09365592 LP |
268 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
269 | assert_return(bus, -EINVAL); | |
270 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
271 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
272 | ||
273 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b); | |
274 | return 0; | |
275 | } | |
276 | ||
d9f644e2 | 277 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 LP |
278 | assert_return(bus, -EINVAL); |
279 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
280 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 281 | |
264ad849 LP |
282 | SET_FLAG(bus->hello_flags, KDBUS_HELLO_ACCEPT_FD, b); |
283 | return 0; | |
284 | } | |
285 | ||
4fc31988 | 286 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
b5dae4c7 | 287 | uint64_t new_flags; |
16be4368 | 288 | assert_return(bus, -EINVAL); |
b5dae4c7 | 289 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
290 | assert_return(!bus_pid_changed(bus), -ECHILD); |
291 | ||
b5dae4c7 LP |
292 | new_flags = bus->attach_flags; |
293 | SET_FLAG(new_flags, KDBUS_ATTACH_TIMESTAMP, b); | |
294 | ||
295 | if (bus->attach_flags == new_flags) | |
296 | return 0; | |
297 | ||
298 | bus->attach_flags = new_flags; | |
b5dae4c7 | 299 | |
16be4368 KS |
300 | return 0; |
301 | } | |
302 | ||
b5dae4c7 LP |
303 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
304 | uint64_t new_flags; | |
305 | ||
16be4368 | 306 | assert_return(bus, -EINVAL); |
95c4fe82 | 307 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 308 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
309 | assert_return(!bus_pid_changed(bus), -ECHILD); |
310 | ||
5883ff60 | 311 | SET_FLAG(bus->creds_mask, mask, b); |
b5dae4c7 | 312 | |
49b832c5 | 313 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
314 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
315 | ||
316 | /* Make sure we don't lose the timestamp flag */ | |
317 | new_flags = (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) | attach_flags_to_kdbus(bus->creds_mask); | |
318 | if (bus->attach_flags == new_flags) | |
319 | return 0; | |
49b832c5 | 320 | |
b5dae4c7 | 321 | bus->attach_flags = new_flags; |
b5dae4c7 LP |
322 | |
323 | return 0; | |
021a1e78 | 324 | } |
de1c301e | 325 | |
d9f644e2 | 326 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 LP |
327 | assert_return(bus, -EINVAL); |
328 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); | |
329 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
330 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
331 | |
332 | bus->is_server = !!b; | |
98178d39 | 333 | bus->server_id = server_id; |
2181a7f5 LP |
334 | return 0; |
335 | } | |
336 | ||
d9f644e2 | 337 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 LP |
338 | assert_return(bus, -EINVAL); |
339 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
340 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
341 | |
342 | bus->anonymous_auth = !!b; | |
343 | return 0; | |
344 | } | |
345 | ||
adacb957 LP |
346 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
347 | assert_return(bus, -EINVAL); | |
348 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
349 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
350 | ||
351 | bus->trusted = !!b; | |
352 | return 0; | |
353 | } | |
354 | ||
455971c1 | 355 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 356 | assert_return(bus, -EINVAL); |
5972fe95 LP |
357 | assert_return(bus->state == BUS_UNSET, -EPERM); |
358 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
359 | ||
d1b91c99 | 360 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
361 | } |
362 | ||
c0765ddb LP |
363 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
364 | assert_return(bus, -EINVAL); | |
365 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
366 | ||
367 | bus->allow_interactive_authorization = !!b; | |
368 | return 0; | |
369 | } | |
370 | ||
371 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
372 | assert_return(bus, -EINVAL); | |
373 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
374 | ||
375 | return bus->allow_interactive_authorization; | |
376 | } | |
377 | ||
19070062 | 378 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 379 | const char *s; |
19070062 | 380 | sd_bus *bus; |
de1c301e LP |
381 | int r; |
382 | ||
19070062 LP |
383 | assert(reply); |
384 | bus = reply->bus; | |
de1c301e | 385 | assert(bus); |
945c2931 | 386 | assert(IN_SET(bus->state, BUS_HELLO, BUS_CLOSING)); |
de1c301e | 387 | |
40ca29a1 | 388 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
389 | if (r > 0) |
390 | return -r; | |
eb01ba5d | 391 | |
de1c301e LP |
392 | r = sd_bus_message_read(reply, "s", &s); |
393 | if (r < 0) | |
394 | return r; | |
395 | ||
dafb7591 LP |
396 | if (!service_name_is_valid(s) || s[0] != ':') |
397 | return -EBADMSG; | |
398 | ||
de1c301e LP |
399 | bus->unique_name = strdup(s); |
400 | if (!bus->unique_name) | |
401 | return -ENOMEM; | |
402 | ||
c99c09a2 LP |
403 | if (bus->state == BUS_HELLO) |
404 | bus->state = BUS_RUNNING; | |
dafb7591 | 405 | |
de1c301e LP |
406 | return 1; |
407 | } | |
408 | ||
409 | static int bus_send_hello(sd_bus *bus) { | |
4afd3348 | 410 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
de1c301e LP |
411 | int r; |
412 | ||
413 | assert(bus); | |
414 | ||
a132bef0 | 415 | if (!bus->bus_client) |
021a1e78 LP |
416 | return 0; |
417 | ||
de1c301e LP |
418 | r = sd_bus_message_new_method_call( |
419 | bus, | |
151b9b96 | 420 | &m, |
de1c301e | 421 | "org.freedesktop.DBus", |
a7639e37 | 422 | "/org/freedesktop/DBus", |
de1c301e | 423 | "org.freedesktop.DBus", |
151b9b96 | 424 | "Hello"); |
de1c301e LP |
425 | if (r < 0) |
426 | return r; | |
427 | ||
19befb2d | 428 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
429 | } |
430 | ||
a7e3212d | 431 | int bus_start_running(sd_bus *bus) { |
de1c301e LP |
432 | assert(bus); |
433 | ||
a132bef0 | 434 | if (bus->bus_client) { |
de1c301e | 435 | bus->state = BUS_HELLO; |
e3017af9 | 436 | return 1; |
de1c301e LP |
437 | } |
438 | ||
439 | bus->state = BUS_RUNNING; | |
e3017af9 | 440 | return 1; |
de1c301e LP |
441 | } |
442 | ||
443 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 444 | size_t l, n = 0, allocated = 0; |
de1c301e LP |
445 | const char *a; |
446 | char *r = NULL; | |
447 | ||
448 | assert(p); | |
449 | assert(*p); | |
de1c301e LP |
450 | assert(value); |
451 | ||
2fd9ae2e LP |
452 | if (key) { |
453 | l = strlen(key); | |
454 | if (strncmp(*p, key, l) != 0) | |
455 | return 0; | |
de1c301e | 456 | |
2fd9ae2e LP |
457 | if ((*p)[l] != '=') |
458 | return 0; | |
de1c301e | 459 | |
2fd9ae2e LP |
460 | if (*value) |
461 | return -EINVAL; | |
de1c301e | 462 | |
2fd9ae2e LP |
463 | a = *p + l + 1; |
464 | } else | |
465 | a = *p; | |
466 | ||
945c2931 | 467 | while (!IN_SET(*a, ';', ',', 0)) { |
821e0756 | 468 | char c; |
de1c301e LP |
469 | |
470 | if (*a == '%') { | |
471 | int x, y; | |
472 | ||
473 | x = unhexchar(a[1]); | |
474 | if (x < 0) { | |
475 | free(r); | |
476 | return x; | |
477 | } | |
478 | ||
479 | y = unhexchar(a[2]); | |
480 | if (y < 0) { | |
481 | free(r); | |
482 | return y; | |
483 | } | |
484 | ||
de1c301e | 485 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
486 | a += 3; |
487 | } else { | |
de1c301e | 488 | c = *a; |
89ffcd2a LP |
489 | a++; |
490 | } | |
de1c301e | 491 | |
821e0756 | 492 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 493 | return -ENOMEM; |
de1c301e | 494 | |
de1c301e LP |
495 | r[n++] = c; |
496 | } | |
497 | ||
89ffcd2a LP |
498 | if (!r) { |
499 | r = strdup(""); | |
500 | if (!r) | |
501 | return -ENOMEM; | |
502 | } else | |
503 | r[n] = 0; | |
504 | ||
505 | if (*a == ',') | |
506 | a++; | |
507 | ||
de1c301e | 508 | *p = a; |
2fd9ae2e LP |
509 | |
510 | free(*value); | |
de1c301e | 511 | *value = r; |
2fd9ae2e | 512 | |
de1c301e LP |
513 | return 1; |
514 | } | |
515 | ||
516 | static void skip_address_key(const char **p) { | |
517 | assert(p); | |
518 | assert(*p); | |
519 | ||
89ffcd2a LP |
520 | *p += strcspn(*p, ","); |
521 | ||
522 | if (**p == ',') | |
313cefa1 | 523 | (*p)++; |
de1c301e LP |
524 | } |
525 | ||
2fd9ae2e LP |
526 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
527 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
528 | size_t l; | |
de1c301e LP |
529 | int r; |
530 | ||
531 | assert(b); | |
2fd9ae2e LP |
532 | assert(p); |
533 | assert(*p); | |
534 | assert(guid); | |
de1c301e | 535 | |
945c2931 | 536 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
537 | r = parse_address_key(p, "guid", guid); |
538 | if (r < 0) | |
539 | return r; | |
540 | else if (r > 0) | |
541 | continue; | |
de1c301e | 542 | |
2fd9ae2e LP |
543 | r = parse_address_key(p, "path", &path); |
544 | if (r < 0) | |
545 | return r; | |
546 | else if (r > 0) | |
547 | continue; | |
de1c301e | 548 | |
2fd9ae2e LP |
549 | r = parse_address_key(p, "abstract", &abstract); |
550 | if (r < 0) | |
551 | return r; | |
552 | else if (r > 0) | |
553 | continue; | |
de1c301e | 554 | |
2fd9ae2e LP |
555 | skip_address_key(p); |
556 | } | |
de1c301e | 557 | |
2fd9ae2e LP |
558 | if (!path && !abstract) |
559 | return -EINVAL; | |
de1c301e | 560 | |
2fd9ae2e LP |
561 | if (path && abstract) |
562 | return -EINVAL; | |
563 | ||
564 | if (path) { | |
565 | l = strlen(path); | |
566 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
567 | return -E2BIG; | |
de1c301e | 568 | |
2fd9ae2e LP |
569 | b->sockaddr.un.sun_family = AF_UNIX; |
570 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
571 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
572 | } else if (abstract) { | |
573 | l = strlen(abstract); | |
574 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
575 | return -E2BIG; | |
576 | ||
577 | b->sockaddr.un.sun_family = AF_UNIX; | |
578 | b->sockaddr.un.sun_path[0] = 0; | |
579 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
580 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
581 | } | |
582 | ||
694859b5 LP |
583 | b->is_local = true; |
584 | ||
2fd9ae2e LP |
585 | return 0; |
586 | } | |
587 | ||
588 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
589 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 590 | int r; |
b92bea5d ZJS |
591 | struct addrinfo *result, hints = { |
592 | .ai_socktype = SOCK_STREAM, | |
593 | .ai_flags = AI_ADDRCONFIG, | |
594 | }; | |
2fd9ae2e LP |
595 | |
596 | assert(b); | |
597 | assert(p); | |
598 | assert(*p); | |
599 | assert(guid); | |
600 | ||
945c2931 | 601 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
602 | r = parse_address_key(p, "guid", guid); |
603 | if (r < 0) | |
604 | return r; | |
605 | else if (r > 0) | |
606 | continue; | |
607 | ||
608 | r = parse_address_key(p, "host", &host); | |
609 | if (r < 0) | |
610 | return r; | |
611 | else if (r > 0) | |
612 | continue; | |
613 | ||
614 | r = parse_address_key(p, "port", &port); | |
615 | if (r < 0) | |
616 | return r; | |
617 | else if (r > 0) | |
618 | continue; | |
619 | ||
620 | r = parse_address_key(p, "family", &family); | |
621 | if (r < 0) | |
622 | return r; | |
623 | else if (r > 0) | |
624 | continue; | |
625 | ||
626 | skip_address_key(p); | |
627 | } | |
628 | ||
629 | if (!host || !port) | |
630 | return -EINVAL; | |
631 | ||
2fd9ae2e LP |
632 | if (family) { |
633 | if (streq(family, "ipv4")) | |
634 | hints.ai_family = AF_INET; | |
635 | else if (streq(family, "ipv6")) | |
636 | hints.ai_family = AF_INET6; | |
637 | else | |
638 | return -EINVAL; | |
639 | } | |
640 | ||
641 | r = getaddrinfo(host, port, &hints, &result); | |
642 | if (r == EAI_SYSTEM) | |
643 | return -errno; | |
644 | else if (r != 0) | |
645 | return -EADDRNOTAVAIL; | |
646 | ||
647 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
648 | b->sockaddr_size = result->ai_addrlen; | |
649 | ||
650 | freeaddrinfo(result); | |
651 | ||
694859b5 LP |
652 | b->is_local = false; |
653 | ||
2fd9ae2e LP |
654 | return 0; |
655 | } | |
656 | ||
657 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
658 | char *path = NULL; | |
659 | unsigned n_argv = 0, j; | |
660 | char **argv = NULL; | |
821e0756 | 661 | size_t allocated = 0; |
2fd9ae2e LP |
662 | int r; |
663 | ||
664 | assert(b); | |
665 | assert(p); | |
666 | assert(*p); | |
667 | assert(guid); | |
668 | ||
945c2931 | 669 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
670 | r = parse_address_key(p, "guid", guid); |
671 | if (r < 0) | |
672 | goto fail; | |
673 | else if (r > 0) | |
674 | continue; | |
675 | ||
676 | r = parse_address_key(p, "path", &path); | |
677 | if (r < 0) | |
678 | goto fail; | |
679 | else if (r > 0) | |
680 | continue; | |
681 | ||
682 | if (startswith(*p, "argv")) { | |
683 | unsigned ul; | |
684 | ||
685 | errno = 0; | |
686 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 687 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
688 | r = -EINVAL; |
689 | goto fail; | |
690 | } | |
691 | ||
313cefa1 | 692 | (*p)++; |
2fd9ae2e LP |
693 | |
694 | if (ul >= n_argv) { | |
821e0756 | 695 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
696 | r = -ENOMEM; |
697 | goto fail; | |
698 | } | |
699 | ||
2fd9ae2e LP |
700 | n_argv = ul + 1; |
701 | } | |
702 | ||
703 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 704 | if (r < 0) |
2fd9ae2e | 705 | goto fail; |
de1c301e | 706 | |
2fd9ae2e | 707 | continue; |
de1c301e LP |
708 | } |
709 | ||
2fd9ae2e LP |
710 | skip_address_key(p); |
711 | } | |
de1c301e | 712 | |
5a0f6033 LP |
713 | if (!path) { |
714 | r = -EINVAL; | |
2fd9ae2e | 715 | goto fail; |
5a0f6033 | 716 | } |
de1c301e | 717 | |
2fd9ae2e LP |
718 | /* Make sure there are no holes in the array, with the |
719 | * exception of argv[0] */ | |
720 | for (j = 1; j < n_argv; j++) | |
721 | if (!argv[j]) { | |
722 | r = -EINVAL; | |
723 | goto fail; | |
724 | } | |
725 | ||
726 | if (argv && argv[0] == NULL) { | |
727 | argv[0] = strdup(path); | |
728 | if (!argv[0]) { | |
729 | r = -ENOMEM; | |
730 | goto fail; | |
731 | } | |
732 | } | |
de1c301e | 733 | |
2fd9ae2e LP |
734 | b->exec_path = path; |
735 | b->exec_argv = argv; | |
694859b5 LP |
736 | |
737 | b->is_local = false; | |
738 | ||
2fd9ae2e | 739 | return 0; |
de1c301e | 740 | |
2fd9ae2e LP |
741 | fail: |
742 | for (j = 0; j < n_argv; j++) | |
743 | free(argv[j]); | |
744 | ||
745 | free(argv); | |
746 | free(path); | |
747 | return r; | |
748 | } | |
749 | ||
bc9fd78c | 750 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 751 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
752 | int r; |
753 | ||
754 | assert(b); | |
755 | assert(p); | |
756 | assert(*p); | |
757 | assert(guid); | |
758 | ||
945c2931 | 759 | while (!IN_SET(**p, 0, ';')) { |
a7893c6b LP |
760 | r = parse_address_key(p, "guid", guid); |
761 | if (r < 0) | |
762 | return r; | |
763 | else if (r > 0) | |
764 | continue; | |
765 | ||
766 | r = parse_address_key(p, "machine", &machine); | |
767 | if (r < 0) | |
768 | return r; | |
769 | else if (r > 0) | |
770 | continue; | |
771 | ||
ee502e0c LP |
772 | r = parse_address_key(p, "pid", &pid); |
773 | if (r < 0) | |
774 | return r; | |
775 | else if (r > 0) | |
776 | continue; | |
777 | ||
a7893c6b LP |
778 | skip_address_key(p); |
779 | } | |
780 | ||
ee502e0c | 781 | if (!machine == !pid) |
a7893c6b LP |
782 | return -EINVAL; |
783 | ||
ee502e0c LP |
784 | if (machine) { |
785 | if (!machine_name_is_valid(machine)) | |
786 | return -EINVAL; | |
b6741478 | 787 | |
ee502e0c LP |
788 | free(b->machine); |
789 | b->machine = machine; | |
790 | machine = NULL; | |
791 | } else { | |
a1e58e8e | 792 | b->machine = mfree(b->machine); |
ee502e0c LP |
793 | } |
794 | ||
795 | if (pid) { | |
796 | r = parse_pid(pid, &b->nspid); | |
797 | if (r < 0) | |
798 | return r; | |
799 | } else | |
800 | b->nspid = 0; | |
a7893c6b LP |
801 | |
802 | b->sockaddr.un.sun_family = AF_UNIX; | |
df1e0204 | 803 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
fc2fffe7 | 804 | b->sockaddr_size = SOCKADDR_UN_LEN(b->sockaddr.un); |
694859b5 | 805 | b->is_local = false; |
a7893c6b LP |
806 | |
807 | return 0; | |
808 | } | |
809 | ||
2fd9ae2e LP |
810 | static void bus_reset_parsed_address(sd_bus *b) { |
811 | assert(b); | |
812 | ||
813 | zero(b->sockaddr); | |
814 | b->sockaddr_size = 0; | |
ba243e51 NK |
815 | b->exec_argv = strv_free(b->exec_argv); |
816 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 817 | b->server_id = SD_ID128_NULL; |
ba243e51 | 818 | b->machine = mfree(b->machine); |
ee502e0c | 819 | b->nspid = 0; |
2fd9ae2e LP |
820 | } |
821 | ||
822 | static int bus_parse_next_address(sd_bus *b) { | |
823 | _cleanup_free_ char *guid = NULL; | |
824 | const char *a; | |
825 | int r; | |
826 | ||
827 | assert(b); | |
828 | ||
829 | if (!b->address) | |
830 | return 0; | |
831 | if (b->address[b->address_index] == 0) | |
832 | return 0; | |
833 | ||
834 | bus_reset_parsed_address(b); | |
835 | ||
836 | a = b->address + b->address_index; | |
de1c301e | 837 | |
2fd9ae2e | 838 | while (*a != 0) { |
de1c301e | 839 | |
2fd9ae2e LP |
840 | if (*a == ';') { |
841 | a++; | |
842 | continue; | |
de1c301e LP |
843 | } |
844 | ||
2fd9ae2e LP |
845 | if (startswith(a, "unix:")) { |
846 | a += 5; | |
de1c301e | 847 | |
2fd9ae2e | 848 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
849 | if (r < 0) |
850 | return r; | |
2fd9ae2e | 851 | break; |
de1c301e | 852 | |
2fd9ae2e | 853 | } else if (startswith(a, "tcp:")) { |
de1c301e | 854 | |
2fd9ae2e LP |
855 | a += 4; |
856 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
857 | if (r < 0) |
858 | return r; | |
de1c301e | 859 | |
2fd9ae2e LP |
860 | break; |
861 | ||
862 | } else if (startswith(a, "unixexec:")) { | |
863 | ||
864 | a += 9; | |
865 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
866 | if (r < 0) |
867 | return r; | |
de1c301e | 868 | |
2fd9ae2e | 869 | break; |
de1c301e | 870 | |
de33fc62 | 871 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 872 | |
146d4773 | 873 | a += 15; |
bc9fd78c LP |
874 | r = parse_container_unix_address(b, &a, &guid); |
875 | if (r < 0) | |
876 | return r; | |
877 | ||
6629161f | 878 | break; |
de1c301e LP |
879 | } |
880 | ||
2fd9ae2e LP |
881 | a = strchr(a, ';'); |
882 | if (!a) | |
883 | return 0; | |
de1c301e LP |
884 | } |
885 | ||
886 | if (guid) { | |
98178d39 | 887 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
888 | if (r < 0) |
889 | return r; | |
890 | } | |
891 | ||
2fd9ae2e | 892 | b->address_index = a - b->address; |
de1c301e LP |
893 | return 1; |
894 | } | |
895 | ||
a7e3212d | 896 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
897 | int r; |
898 | ||
899 | assert(b); | |
900 | ||
901 | for (;;) { | |
1e05d493 | 902 | bus_close_fds(b); |
a7e3212d | 903 | |
a132bef0 ZJS |
904 | /* If you provide multiple different bus-addresses, we |
905 | * try all of them in order and use the first one that | |
906 | * succeeds. */ | |
15442912 | 907 | |
1e05d493 | 908 | if (b->exec_path) |
a7893c6b | 909 | r = bus_socket_exec(b); |
1e05d493 | 910 | |
a132bef0 ZJS |
911 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
912 | r = bus_container_connect_socket(b); | |
913 | ||
914 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) | |
915 | r = bus_socket_connect(b); | |
6629161f | 916 | |
a132bef0 ZJS |
917 | else |
918 | goto next; | |
919 | ||
920 | if (r >= 0) { | |
921 | r = attach_io_events(b); | |
922 | if (r >= 0) | |
923 | return r; | |
2fd9ae2e LP |
924 | } |
925 | ||
a132bef0 ZJS |
926 | b->last_connect_error = -r; |
927 | ||
928 | next: | |
2fd9ae2e LP |
929 | r = bus_parse_next_address(b); |
930 | if (r < 0) | |
931 | return r; | |
932 | if (r == 0) | |
a132bef0 | 933 | return b->last_connect_error > 0 ? -b->last_connect_error : -ECONNREFUSED; |
de1c301e LP |
934 | } |
935 | } | |
936 | ||
a7e3212d LP |
937 | int bus_next_address(sd_bus *b) { |
938 | assert(b); | |
939 | ||
940 | bus_reset_parsed_address(b); | |
941 | return bus_start_address(b); | |
942 | } | |
943 | ||
021a1e78 | 944 | static int bus_start_fd(sd_bus *b) { |
6629161f | 945 | struct stat st; |
021a1e78 LP |
946 | int r; |
947 | ||
948 | assert(b); | |
e82c9509 LP |
949 | assert(b->input_fd >= 0); |
950 | assert(b->output_fd >= 0); | |
021a1e78 | 951 | |
e82c9509 | 952 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
953 | if (r < 0) |
954 | return r; | |
955 | ||
e82c9509 | 956 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
957 | if (r < 0) |
958 | return r; | |
959 | ||
e82c9509 LP |
960 | if (b->input_fd != b->output_fd) { |
961 | r = fd_nonblock(b->output_fd, true); | |
962 | if (r < 0) | |
963 | return r; | |
964 | ||
965 | r = fd_cloexec(b->output_fd, true); | |
966 | if (r < 0) | |
967 | return r; | |
968 | } | |
969 | ||
6629161f LP |
970 | if (fstat(b->input_fd, &st) < 0) |
971 | return -errno; | |
972 | ||
a132bef0 | 973 | return bus_socket_take_fd(b); |
021a1e78 LP |
974 | } |
975 | ||
d9f644e2 | 976 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
977 | int r; |
978 | ||
d6888822 LP |
979 | assert_return(bus, -EINVAL); |
980 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
981 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
982 | |
983 | bus->state = BUS_OPENING; | |
984 | ||
2181a7f5 LP |
985 | if (bus->is_server && bus->bus_client) |
986 | return -EINVAL; | |
987 | ||
e82c9509 | 988 | if (bus->input_fd >= 0) |
021a1e78 | 989 | r = bus_start_fd(bus); |
a132bef0 | 990 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->machine) |
a7e3212d | 991 | r = bus_start_address(bus); |
021a1e78 LP |
992 | else |
993 | return -EINVAL; | |
994 | ||
db9bb83f LP |
995 | if (r < 0) { |
996 | sd_bus_close(bus); | |
021a1e78 | 997 | return r; |
db9bb83f | 998 | } |
021a1e78 LP |
999 | |
1000 | return bus_send_hello(bus); | |
1001 | } | |
1002 | ||
af08d2f9 LP |
1003 | _public_ int sd_bus_open(sd_bus **ret) { |
1004 | const char *e; | |
1005 | sd_bus *b; | |
1006 | int r; | |
1007 | ||
1008 | assert_return(ret, -EINVAL); | |
1009 | ||
1010 | /* Let's connect to the starter bus if it is set, and | |
1011 | * otherwise to the bus that is appropropriate for the scope | |
1012 | * we are running in */ | |
1013 | ||
1014 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1015 | if (e) { | |
1016 | if (streq(e, "system")) | |
1017 | return sd_bus_open_system(ret); | |
09365592 | 1018 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1019 | return sd_bus_open_user(ret); |
1020 | } | |
1021 | ||
1022 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1023 | if (!e) { | |
1024 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1025 | return sd_bus_open_user(ret); | |
1026 | else | |
1027 | return sd_bus_open_system(ret); | |
1028 | } | |
1029 | ||
1030 | r = sd_bus_new(&b); | |
1031 | if (r < 0) | |
1032 | return r; | |
1033 | ||
1034 | r = sd_bus_set_address(b, e); | |
1035 | if (r < 0) | |
1036 | goto fail; | |
1037 | ||
1038 | b->bus_client = true; | |
1039 | ||
1040 | /* We don't know whether the bus is trusted or not, so better | |
1041 | * be safe, and authenticate everything */ | |
1042 | b->trusted = false; | |
694859b5 | 1043 | b->is_local = false; |
cf226cfc LP |
1044 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; |
1045 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; | |
af08d2f9 LP |
1046 | |
1047 | r = sd_bus_start(b); | |
1048 | if (r < 0) | |
1049 | goto fail; | |
1050 | ||
1051 | *ret = b; | |
1052 | return 0; | |
1053 | ||
1054 | fail: | |
1055 | bus_free(b); | |
1056 | return r; | |
1057 | } | |
1058 | ||
09365592 | 1059 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1060 | const char *e; |
09365592 LP |
1061 | assert(b); |
1062 | ||
1063 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1064 | if (e) | |
1065 | return sd_bus_set_address(b, e); | |
1066 | ||
057171ef | 1067 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1068 | } |
1069 | ||
1070 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1071 | sd_bus *b; |
1072 | int r; | |
1073 | ||
d6888822 | 1074 | assert_return(ret, -EINVAL); |
de1c301e | 1075 | |
021a1e78 LP |
1076 | r = sd_bus_new(&b); |
1077 | if (r < 0) | |
1078 | return r; | |
1079 | ||
09365592 | 1080 | r = bus_set_address_system(b); |
e3dd987c LP |
1081 | if (r < 0) |
1082 | goto fail; | |
de1c301e | 1083 | |
94bbf1ba | 1084 | b->bus_client = true; |
5972fe95 | 1085 | b->is_system = true; |
021a1e78 | 1086 | |
adacb957 LP |
1087 | /* Let's do per-method access control on the system bus. We |
1088 | * need the caller's UID and capability set for that. */ | |
1089 | b->trusted = false; | |
1090 | b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS; | |
cf226cfc | 1091 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
694859b5 | 1092 | b->is_local = true; |
adacb957 | 1093 | |
021a1e78 LP |
1094 | r = sd_bus_start(b); |
1095 | if (r < 0) | |
1096 | goto fail; | |
de1c301e LP |
1097 | |
1098 | *ret = b; | |
1099 | return 0; | |
021a1e78 LP |
1100 | |
1101 | fail: | |
1102 | bus_free(b); | |
1103 | return r; | |
de1c301e LP |
1104 | } |
1105 | ||
09365592 | 1106 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1107 | const char *e; |
a132bef0 | 1108 | _cleanup_free_ char *ee = NULL, *s = NULL; |
de1c301e | 1109 | |
09365592 | 1110 | assert(b); |
021a1e78 | 1111 | |
6c03089c | 1112 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1113 | if (e) |
1114 | return sd_bus_set_address(b, e); | |
1115 | ||
1116 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
a132bef0 ZJS |
1117 | if (!e) |
1118 | return -ENOENT; | |
e3dd987c | 1119 | |
a132bef0 ZJS |
1120 | ee = bus_address_escape(e); |
1121 | if (!ee) | |
1122 | return -ENOMEM; | |
de1c301e | 1123 | |
a132bef0 | 1124 | if (asprintf(&s, UNIX_USER_BUS_ADDRESS_FMT, ee) < 0) |
09365592 LP |
1125 | return -ENOMEM; |
1126 | ||
a132bef0 ZJS |
1127 | b->address = s; |
1128 | s = NULL; | |
1129 | ||
09365592 LP |
1130 | return 0; |
1131 | } | |
1132 | ||
1133 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1134 | sd_bus *b; | |
1135 | int r; | |
1136 | ||
1137 | assert_return(ret, -EINVAL); | |
1138 | ||
1139 | r = sd_bus_new(&b); | |
1140 | if (r < 0) | |
1141 | return r; | |
1142 | ||
1143 | r = bus_set_address_user(b); | |
1144 | if (r < 0) | |
4f6631c8 | 1145 | goto fail; |
09365592 | 1146 | |
94bbf1ba | 1147 | b->bus_client = true; |
5972fe95 | 1148 | b->is_user = true; |
de1c301e | 1149 | |
adacb957 LP |
1150 | /* We don't do any per-method access control on the user |
1151 | * bus. */ | |
1152 | b->trusted = true; | |
694859b5 | 1153 | b->is_local = true; |
adacb957 | 1154 | |
021a1e78 | 1155 | r = sd_bus_start(b); |
2571ead1 LP |
1156 | if (r < 0) |
1157 | goto fail; | |
de1c301e LP |
1158 | |
1159 | *ret = b; | |
1160 | return 0; | |
2571ead1 LP |
1161 | |
1162 | fail: | |
021a1e78 | 1163 | bus_free(b); |
2571ead1 | 1164 | return r; |
de1c301e LP |
1165 | } |
1166 | ||
09365592 | 1167 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1168 | _cleanup_free_ char *e = NULL; |
7f0d207d | 1169 | char *m = NULL, *c = NULL; |
0f8bd8de | 1170 | |
09365592 LP |
1171 | assert(b); |
1172 | assert(host); | |
0f8bd8de | 1173 | |
7f0d207d LP |
1174 | /* Let's see if we shall enter some container */ |
1175 | m = strchr(host, ':'); | |
1176 | if (m) { | |
1177 | m++; | |
1178 | ||
1179 | /* Let's make sure this is not a port of some kind, | |
1180 | * and is a valid machine name. */ | |
1181 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1182 | char *t; | |
1183 | ||
1184 | /* Cut out the host part */ | |
1185 | t = strndupa(host, m - host - 1); | |
1186 | e = bus_address_escape(t); | |
1187 | if (!e) | |
1188 | return -ENOMEM; | |
1189 | ||
58c6e4a2 | 1190 | c = strjoina(",argv5=--machine=", m); |
7f0d207d LP |
1191 | } |
1192 | } | |
1193 | ||
1194 | if (!e) { | |
1195 | e = bus_address_escape(host); | |
1196 | if (!e) | |
1197 | return -ENOMEM; | |
1198 | } | |
0f8bd8de | 1199 | |
58c6e4a2 | 1200 | b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=--,argv3=", e, ",argv4=systemd-stdio-bridge", c); |
09365592 | 1201 | if (!b->address) |
0f8bd8de | 1202 | return -ENOMEM; |
a7893c6b | 1203 | |
09365592 LP |
1204 | return 0; |
1205 | } | |
1206 | ||
1207 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1208 | sd_bus *bus; | |
1209 | int r; | |
1210 | ||
1211 | assert_return(host, -EINVAL); | |
1212 | assert_return(ret, -EINVAL); | |
1213 | ||
a7893c6b | 1214 | r = sd_bus_new(&bus); |
09365592 | 1215 | if (r < 0) |
a7893c6b | 1216 | return r; |
a7893c6b | 1217 | |
09365592 LP |
1218 | r = bus_set_address_system_remote(bus, host); |
1219 | if (r < 0) | |
1220 | goto fail; | |
1221 | ||
a7893c6b | 1222 | bus->bus_client = true; |
09365592 | 1223 | bus->trusted = false; |
3acc1daf | 1224 | bus->is_system = true; |
694859b5 | 1225 | bus->is_local = false; |
a7893c6b LP |
1226 | |
1227 | r = sd_bus_start(bus); | |
09365592 LP |
1228 | if (r < 0) |
1229 | goto fail; | |
a7893c6b LP |
1230 | |
1231 | *ret = bus; | |
1232 | return 0; | |
09365592 LP |
1233 | |
1234 | fail: | |
1235 | bus_free(bus); | |
1236 | return r; | |
a7893c6b LP |
1237 | } |
1238 | ||
de33fc62 | 1239 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1240 | _cleanup_free_ char *e = NULL; |
a7893c6b | 1241 | |
09365592 LP |
1242 | assert(b); |
1243 | assert(machine); | |
a7893c6b LP |
1244 | |
1245 | e = bus_address_escape(machine); | |
1246 | if (!e) | |
1247 | return -ENOMEM; | |
1248 | ||
a132bef0 | 1249 | b->address = strjoin("x-machine-unix:machine=", e); |
09365592 | 1250 | if (!b->address) |
a7893c6b | 1251 | return -ENOMEM; |
0f8bd8de | 1252 | |
09365592 LP |
1253 | return 0; |
1254 | } | |
1255 | ||
de33fc62 | 1256 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1257 | sd_bus *bus; |
1258 | int r; | |
1259 | ||
1260 | assert_return(machine, -EINVAL); | |
1261 | assert_return(ret, -EINVAL); | |
affcf189 | 1262 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1263 | |
0f8bd8de | 1264 | r = sd_bus_new(&bus); |
09365592 | 1265 | if (r < 0) |
0f8bd8de | 1266 | return r; |
0f8bd8de | 1267 | |
de33fc62 | 1268 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1269 | if (r < 0) |
1270 | goto fail; | |
1271 | ||
0f8bd8de | 1272 | bus->bus_client = true; |
09365592 | 1273 | bus->trusted = false; |
3acc1daf | 1274 | bus->is_system = true; |
694859b5 | 1275 | bus->is_local = false; |
0f8bd8de LP |
1276 | |
1277 | r = sd_bus_start(bus); | |
09365592 LP |
1278 | if (r < 0) |
1279 | goto fail; | |
0f8bd8de LP |
1280 | |
1281 | *ret = bus; | |
1282 | return 0; | |
09365592 LP |
1283 | |
1284 | fail: | |
1285 | bus_free(bus); | |
1286 | return r; | |
0f8bd8de LP |
1287 | } |
1288 | ||
d9f644e2 | 1289 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1290 | |
de1c301e LP |
1291 | if (!bus) |
1292 | return; | |
d5a2b9a6 LP |
1293 | if (bus->state == BUS_CLOSED) |
1294 | return; | |
1295 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1296 | return; |
1297 | ||
1298 | bus->state = BUS_CLOSED; | |
e82c9509 | 1299 | |
40ca29a1 LP |
1300 | sd_bus_detach_event(bus); |
1301 | ||
0e586eae LP |
1302 | /* Drop all queued messages so that they drop references to |
1303 | * the bus object and the bus may be freed */ | |
1304 | bus_reset_queues(bus); | |
1305 | ||
a132bef0 | 1306 | bus_close_fds(bus); |
de1c301e LP |
1307 | } |
1308 | ||
03976f7b LP |
1309 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1310 | ||
1311 | if (!bus) | |
1312 | return NULL; | |
1313 | ||
1314 | sd_bus_flush(bus); | |
1315 | sd_bus_close(bus); | |
1316 | ||
1317 | return sd_bus_unref(bus); | |
1318 | } | |
1319 | ||
718db961 LP |
1320 | static void bus_enter_closing(sd_bus *bus) { |
1321 | assert(bus); | |
1322 | ||
945c2931 | 1323 | if (!IN_SET(bus->state, BUS_OPENING, BUS_AUTHENTICATING, BUS_HELLO, BUS_RUNNING)) |
718db961 LP |
1324 | return; |
1325 | ||
1326 | bus->state = BUS_CLOSING; | |
1327 | } | |
1328 | ||
d9f644e2 | 1329 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
4afd3348 LP |
1330 | |
1331 | if (!bus) | |
1332 | return NULL; | |
de1c301e | 1333 | |
e4ee6e5c | 1334 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1335 | |
de1c301e LP |
1336 | return bus; |
1337 | } | |
1338 | ||
d9f644e2 | 1339 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1340 | unsigned i; |
5b1bc83f LP |
1341 | |
1342 | if (!bus) | |
1343 | return NULL; | |
de1c301e | 1344 | |
f389bf15 LP |
1345 | i = REFCNT_DEC(bus->n_ref); |
1346 | if (i > 0) | |
1347 | return NULL; | |
1348 | ||
1349 | bus_free(bus); | |
de1c301e LP |
1350 | return NULL; |
1351 | } | |
1352 | ||
d9f644e2 | 1353 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1354 | |
1355 | assert_return(bus, -EINVAL); | |
1356 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
e3017af9 | 1357 | |
f54514f3 | 1358 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1359 | } |
1360 | ||
d9f644e2 | 1361 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1362 | int r; |
1363 | ||
d6888822 LP |
1364 | assert_return(bus, -EINVAL); |
1365 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); | |
1366 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1367 | |
09365592 LP |
1368 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
1369 | return 0; | |
1370 | ||
d728d708 | 1371 | if (type == SD_BUS_TYPE_UNIX_FD) { |
264ad849 | 1372 | if (!(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) |
021a1e78 LP |
1373 | return 0; |
1374 | ||
20902f3e | 1375 | r = bus_ensure_running(bus); |
d728d708 LP |
1376 | if (r < 0) |
1377 | return r; | |
de1c301e | 1378 | |
d728d708 LP |
1379 | return bus->can_fds; |
1380 | } | |
1381 | ||
1382 | return bus_type_is_valid(type); | |
de1c301e LP |
1383 | } |
1384 | ||
5c302692 | 1385 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1386 | int r; |
de1c301e | 1387 | |
d6888822 | 1388 | assert_return(bus, -EINVAL); |
f7fce345 | 1389 | assert_return(id, -EINVAL); |
d6888822 | 1390 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1391 | |
20902f3e | 1392 | r = bus_ensure_running(bus); |
d728d708 LP |
1393 | if (r < 0) |
1394 | return r; | |
de1c301e | 1395 | |
f7fce345 | 1396 | *id = bus->server_id; |
d728d708 | 1397 | return 0; |
de1c301e LP |
1398 | } |
1399 | ||
3df7a7e6 | 1400 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
7adc46fc | 1401 | assert(b); |
de1c301e LP |
1402 | assert(m); |
1403 | ||
aea93deb LP |
1404 | if (m->sealed) { |
1405 | /* If we copy the same message to multiple | |
693eb9a2 | 1406 | * destinations, avoid using the same cookie |
aea93deb | 1407 | * numbers. */ |
693eb9a2 | 1408 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1409 | return 0; |
aea93deb | 1410 | } |
de1c301e | 1411 | |
3df7a7e6 LP |
1412 | if (timeout == 0) |
1413 | timeout = BUS_DEFAULT_TIMEOUT; | |
1414 | ||
693eb9a2 | 1415 | return bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1416 | } |
1417 | ||
e1c433c6 | 1418 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1419 | bool remarshal = false; |
1420 | ||
e1c433c6 LP |
1421 | assert(b); |
1422 | ||
908b8a42 DH |
1423 | /* wrong packet version */ |
1424 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1425 | remarshal = true; | |
1426 | ||
1427 | /* wrong packet endianness */ | |
1428 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1429 | remarshal = true; | |
1430 | ||
908b8a42 | 1431 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1432 | } |
1433 | ||
7adc46fc LP |
1434 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1435 | assert(b); | |
1436 | assert(m); | |
1437 | ||
52cd5877 LP |
1438 | /* Fake some timestamps, if they were requested, and not |
1439 | * already initialized */ | |
1440 | if (b->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
1441 | if (m->realtime <= 0) | |
1442 | m->realtime = now(CLOCK_REALTIME); | |
1443 | ||
1444 | if (m->monotonic <= 0) | |
1445 | m->monotonic = now(CLOCK_MONOTONIC); | |
1446 | } | |
1447 | ||
7adc46fc LP |
1448 | /* The bus specification says the serial number cannot be 0, |
1449 | * hence let's fill something in for synthetic messages. Since | |
1450 | * synthetic messages might have a fake sender and we don't | |
1451 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1452 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1453 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1454 | * even though kdbus can do 64bit. */ | |
3df7a7e6 | 1455 | return bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1456 | } |
1457 | ||
069f5e61 | 1458 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call, size_t *idx) { |
2e3db52d LP |
1459 | int r; |
1460 | ||
718db961 | 1461 | assert(bus); |
2e3db52d | 1462 | assert(m); |
718db961 | 1463 | |
a132bef0 | 1464 | r = bus_socket_write_message(bus, m, idx); |
2e3db52d LP |
1465 | if (r <= 0) |
1466 | return r; | |
1467 | ||
a132bef0 | 1468 | if (*idx >= BUS_MESSAGE_SIZE(m)) |
e28d0865 | 1469 | log_debug("Sent message type=%s sender=%s destination=%s object=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " error-name=%s error-message=%s", |
2e3db52d LP |
1470 | bus_message_type_to_string(m->header->type), |
1471 | strna(sd_bus_message_get_sender(m)), | |
1472 | strna(sd_bus_message_get_destination(m)), | |
1473 | strna(sd_bus_message_get_path(m)), | |
1474 | strna(sd_bus_message_get_interface(m)), | |
1475 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1476 | BUS_MESSAGE_COOKIE(m), |
1477 | m->reply_cookie, | |
e28d0865 | 1478 | strna(m->error.name), |
2e3db52d LP |
1479 | strna(m->error.message)); |
1480 | ||
1481 | return r; | |
718db961 LP |
1482 | } |
1483 | ||
de1c301e | 1484 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1485 | int r, ret = 0; |
de1c301e LP |
1486 | |
1487 | assert(bus); | |
945c2931 | 1488 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1489 | |
de1c301e LP |
1490 | while (bus->wqueue_size > 0) { |
1491 | ||
069f5e61 | 1492 | r = bus_write_message(bus, bus->wqueue[0], false, &bus->windex); |
718db961 | 1493 | if (r < 0) |
de1c301e | 1494 | return r; |
718db961 | 1495 | else if (r == 0) |
e3017af9 LP |
1496 | /* Didn't do anything this time */ |
1497 | return ret; | |
a132bef0 | 1498 | else if (bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1499 | /* Fully written. Let's drop the entry from |
1500 | * the queue. | |
1501 | * | |
1502 | * This isn't particularly optimized, but | |
1503 | * well, this is supposed to be our worst-case | |
1504 | * buffer only, and the socket buffer is | |
1505 | * supposed to be our primary buffer, and if | |
1506 | * it got full, then all bets are off | |
1507 | * anyway. */ | |
1508 | ||
313cefa1 | 1509 | bus->wqueue_size--; |
c4e6e242 | 1510 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1511 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1512 | bus->windex = 0; | |
1513 | ||
e3017af9 | 1514 | ret = 1; |
de1c301e LP |
1515 | } |
1516 | } | |
1517 | ||
e3017af9 | 1518 | return ret; |
de1c301e LP |
1519 | } |
1520 | ||
766c5809 | 1521 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1522 | assert(bus); |
1523 | ||
a132bef0 | 1524 | return bus_socket_read_message(bus); |
7d22c717 LP |
1525 | } |
1526 | ||
7adc46fc | 1527 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1528 | assert(bus); |
7d22c717 | 1529 | |
821e0756 | 1530 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1531 | return -ENOBUFS; |
1532 | ||
821e0756 | 1533 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1534 | return -ENOMEM; |
1535 | ||
7d22c717 LP |
1536 | return 0; |
1537 | } | |
1538 | ||
766c5809 | 1539 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1540 | int r, ret = 0; |
de1c301e LP |
1541 | |
1542 | assert(bus); | |
1543 | assert(m); | |
945c2931 | 1544 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1545 | |
766c5809 LP |
1546 | /* Note that the priority logic is only available on kdbus, |
1547 | * where the rqueue is unused. We check the rqueue here | |
1548 | * anyway, because it's simple... */ | |
1549 | ||
7d22c717 LP |
1550 | for (;;) { |
1551 | if (bus->rqueue_size > 0) { | |
1552 | /* Dispatch a queued message */ | |
de1c301e | 1553 | |
7d22c717 | 1554 | *m = bus->rqueue[0]; |
313cefa1 | 1555 | bus->rqueue_size--; |
7d22c717 LP |
1556 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); |
1557 | return 1; | |
1558 | } | |
de1c301e | 1559 | |
7d22c717 | 1560 | /* Try to read a new message */ |
766c5809 | 1561 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1562 | if (r < 0) |
e3017af9 | 1563 | return r; |
e3017af9 LP |
1564 | if (r == 0) |
1565 | return ret; | |
de1c301e | 1566 | |
2e8d788c | 1567 | ret = 1; |
7d22c717 | 1568 | } |
de1c301e LP |
1569 | } |
1570 | ||
069f5e61 | 1571 | static int bus_send_internal(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie, bool hint_sync_call) { |
4afd3348 | 1572 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1573 | int r; |
1574 | ||
d6888822 | 1575 | assert_return(m, -EINVAL); |
9030ca46 LP |
1576 | |
1577 | if (!bus) | |
1578 | bus = m->bus; | |
1579 | ||
d6888822 | 1580 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 1581 | |
a3d59cd1 LP |
1582 | if (!BUS_IS_OPEN(bus->state)) |
1583 | return -ENOTCONN; | |
1584 | ||
021a1e78 LP |
1585 | if (m->n_fds > 0) { |
1586 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1587 | if (r < 0) | |
1588 | return r; | |
1589 | if (r == 0) | |
15411c0c | 1590 | return -EOPNOTSUPP; |
021a1e78 | 1591 | } |
de1c301e | 1592 | |
693eb9a2 | 1593 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1594 | * is expected */ |
693eb9a2 | 1595 | if (!cookie && !m->sealed) |
0461f8cd | 1596 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1597 | |
3df7a7e6 | 1598 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1599 | if (r < 0) |
1600 | return r; | |
1601 | ||
441d56a1 | 1602 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1603 | * message and place a replacement in m */ |
1604 | r = bus_remarshal_message(bus, &m); | |
1605 | if (r < 0) | |
1606 | return r; | |
1607 | ||
5407f2de LP |
1608 | /* If this is a reply and no reply was requested, then let's |
1609 | * suppress this, if we can */ | |
997eadb5 LP |
1610 | if (m->dont_send) |
1611 | goto finish; | |
5407f2de | 1612 | |
945c2931 | 1613 | if (IN_SET(bus->state, BUS_RUNNING, BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1614 | size_t idx = 0; |
1615 | ||
069f5e61 | 1616 | r = bus_write_message(bus, m, hint_sync_call, &idx); |
32f46480 | 1617 | if (r < 0) { |
103a5027 | 1618 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1619 | bus_enter_closing(bus); |
441d56a1 LP |
1620 | return -ECONNRESET; |
1621 | } | |
32f46480 | 1622 | |
de1c301e | 1623 | return r; |
997eadb5 LP |
1624 | } |
1625 | ||
a132bef0 | 1626 | if (idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1627 | /* Wasn't fully written. So let's remember how |
1628 | * much was written. Note that the first entry | |
1629 | * of the wqueue array is always allocated so | |
1630 | * that we always can remember how much was | |
1631 | * written. */ | |
1632 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1633 | bus->wqueue_size = 1; | |
1634 | bus->windex = idx; | |
1635 | } | |
997eadb5 | 1636 | |
de1c301e | 1637 | } else { |
de1c301e LP |
1638 | /* Just append it to the queue. */ |
1639 | ||
25220239 | 1640 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1641 | return -ENOBUFS; |
1642 | ||
821e0756 | 1643 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1644 | return -ENOMEM; |
1645 | ||
313cefa1 | 1646 | bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); |
de1c301e LP |
1647 | } |
1648 | ||
997eadb5 | 1649 | finish: |
693eb9a2 LP |
1650 | if (cookie) |
1651 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1652 | |
7a37d625 | 1653 | return 1; |
de1c301e LP |
1654 | } |
1655 | ||
069f5e61 LP |
1656 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *m, uint64_t *cookie) { |
1657 | return bus_send_internal(bus, m, cookie, false); | |
1658 | } | |
1659 | ||
693eb9a2 | 1660 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1661 | int r; |
1662 | ||
911121a7 | 1663 | assert_return(m, -EINVAL); |
9030ca46 LP |
1664 | |
1665 | if (!bus) | |
1666 | bus = m->bus; | |
1667 | ||
911121a7 LP |
1668 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1669 | ||
a3d59cd1 LP |
1670 | if (!BUS_IS_OPEN(bus->state)) |
1671 | return -ENOTCONN; | |
1672 | ||
911121a7 LP |
1673 | if (!streq_ptr(m->destination, destination)) { |
1674 | ||
1675 | if (!destination) | |
1676 | return -EEXIST; | |
1677 | ||
1678 | r = sd_bus_message_set_destination(m, destination); | |
1679 | if (r < 0) | |
1680 | return r; | |
1681 | } | |
1682 | ||
693eb9a2 | 1683 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1684 | } |
1685 | ||
de1c301e LP |
1686 | static usec_t calc_elapse(uint64_t usec) { |
1687 | if (usec == (uint64_t) -1) | |
1688 | return 0; | |
1689 | ||
de1c301e LP |
1690 | return now(CLOCK_MONOTONIC) + usec; |
1691 | } | |
1692 | ||
e3017af9 LP |
1693 | static int timeout_compare(const void *a, const void *b) { |
1694 | const struct reply_callback *x = a, *y = b; | |
1695 | ||
1696 | if (x->timeout != 0 && y->timeout == 0) | |
1697 | return -1; | |
1698 | ||
1699 | if (x->timeout == 0 && y->timeout != 0) | |
1700 | return 1; | |
1701 | ||
1702 | if (x->timeout < y->timeout) | |
1703 | return -1; | |
1704 | ||
1705 | if (x->timeout > y->timeout) | |
1706 | return 1; | |
1707 | ||
1708 | return 0; | |
1709 | } | |
1710 | ||
c49b30a2 | 1711 | _public_ int sd_bus_call_async( |
de1c301e | 1712 | sd_bus *bus, |
19befb2d | 1713 | sd_bus_slot **slot, |
e1c433c6 | 1714 | sd_bus_message *_m, |
52f3ba91 | 1715 | sd_bus_message_handler_t callback, |
de1c301e | 1716 | void *userdata, |
19befb2d | 1717 | uint64_t usec) { |
de1c301e | 1718 | |
4afd3348 LP |
1719 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
1720 | _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; | |
de1c301e LP |
1721 | int r; |
1722 | ||
d6888822 | 1723 | assert_return(m, -EINVAL); |
40ca29a1 | 1724 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
0461f8cd | 1725 | assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL); |
d6888822 | 1726 | assert_return(callback, -EINVAL); |
9030ca46 LP |
1727 | |
1728 | if (!bus) | |
1729 | bus = m->bus; | |
1730 | ||
d6888822 | 1731 | assert_return(!bus_pid_changed(bus), -ECHILD); |
89ffcd2a | 1732 | |
a3d59cd1 LP |
1733 | if (!BUS_IS_OPEN(bus->state)) |
1734 | return -ENOTCONN; | |
1735 | ||
c9fe4af7 | 1736 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1737 | if (r < 0) |
1738 | return r; | |
de1c301e | 1739 | |
3df7a7e6 LP |
1740 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1741 | if (r < 0) | |
1742 | return r; | |
e3017af9 | 1743 | |
3df7a7e6 | 1744 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1745 | if (r < 0) |
1746 | return r; | |
1747 | ||
e1c433c6 LP |
1748 | r = bus_remarshal_message(bus, &m); |
1749 | if (r < 0) | |
1750 | return r; | |
1751 | ||
19befb2d LP |
1752 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); |
1753 | if (!s) | |
de1c301e LP |
1754 | return -ENOMEM; |
1755 | ||
19befb2d | 1756 | s->reply_callback.callback = callback; |
de1c301e | 1757 | |
19befb2d | 1758 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
c9fe4af7 | 1759 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); |
de1c301e | 1760 | if (r < 0) { |
19befb2d | 1761 | s->reply_callback.cookie = 0; |
de1c301e LP |
1762 | return r; |
1763 | } | |
1764 | ||
19befb2d LP |
1765 | s->reply_callback.timeout = calc_elapse(m->timeout); |
1766 | if (s->reply_callback.timeout != 0) { | |
1767 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
e3017af9 | 1768 | if (r < 0) { |
19befb2d | 1769 | s->reply_callback.timeout = 0; |
e3017af9 LP |
1770 | return r; |
1771 | } | |
1772 | } | |
1773 | ||
19befb2d LP |
1774 | r = sd_bus_send(bus, m, &s->reply_callback.cookie); |
1775 | if (r < 0) | |
de1c301e | 1776 | return r; |
de1c301e | 1777 | |
19befb2d LP |
1778 | if (slot) |
1779 | *slot = s; | |
1780 | s = NULL; | |
e3017af9 | 1781 | |
19befb2d | 1782 | return r; |
de1c301e LP |
1783 | } |
1784 | ||
20902f3e | 1785 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
1786 | int r; |
1787 | ||
1788 | assert(bus); | |
1789 | ||
945c2931 | 1790 | if (IN_SET(bus->state, BUS_UNSET, BUS_CLOSED, BUS_CLOSING)) |
021a1e78 | 1791 | return -ENOTCONN; |
d728d708 LP |
1792 | if (bus->state == BUS_RUNNING) |
1793 | return 1; | |
89ffcd2a LP |
1794 | |
1795 | for (;;) { | |
1796 | r = sd_bus_process(bus, NULL); | |
1797 | if (r < 0) | |
1798 | return r; | |
d728d708 LP |
1799 | if (bus->state == BUS_RUNNING) |
1800 | return 1; | |
e3017af9 LP |
1801 | if (r > 0) |
1802 | continue; | |
89ffcd2a LP |
1803 | |
1804 | r = sd_bus_wait(bus, (uint64_t) -1); | |
1805 | if (r < 0) | |
1806 | return r; | |
1807 | } | |
1808 | } | |
1809 | ||
97f82db3 | 1810 | _public_ int sd_bus_call( |
de1c301e | 1811 | sd_bus *bus, |
97f82db3 | 1812 | sd_bus_message *_m, |
de1c301e LP |
1813 | uint64_t usec, |
1814 | sd_bus_error *error, | |
1815 | sd_bus_message **reply) { | |
1816 | ||
4afd3348 | 1817 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 1818 | usec_t timeout; |
693eb9a2 | 1819 | uint64_t cookie; |
7d22c717 LP |
1820 | unsigned i; |
1821 | int r; | |
de1c301e | 1822 | |
759e02e7 LP |
1823 | bus_assert_return(m, -EINVAL, error); |
1824 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
1825 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
1826 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
1827 | |
1828 | if (!bus) | |
1829 | bus = m->bus; | |
1830 | ||
759e02e7 | 1831 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
97f82db3 | 1832 | |
759e02e7 LP |
1833 | if (!BUS_IS_OPEN(bus->state)) { |
1834 | r = -ENOTCONN; | |
1835 | goto fail; | |
1836 | } | |
a3d59cd1 | 1837 | |
97f82db3 KS |
1838 | r = bus_ensure_running(bus); |
1839 | if (r < 0) | |
759e02e7 | 1840 | goto fail; |
97f82db3 | 1841 | |
a43b9ca3 | 1842 | i = bus->rqueue_size; |
97f82db3 KS |
1843 | |
1844 | r = bus_seal_message(bus, m, usec); | |
1845 | if (r < 0) | |
759e02e7 | 1846 | goto fail; |
97f82db3 KS |
1847 | |
1848 | r = bus_remarshal_message(bus, &m); | |
1849 | if (r < 0) | |
759e02e7 | 1850 | goto fail; |
97f82db3 | 1851 | |
069f5e61 | 1852 | r = bus_send_internal(bus, m, &cookie, true); |
de1c301e | 1853 | if (r < 0) |
759e02e7 | 1854 | goto fail; |
de1c301e | 1855 | |
3df7a7e6 | 1856 | timeout = calc_elapse(m->timeout); |
de1c301e LP |
1857 | |
1858 | for (;;) { | |
1859 | usec_t left; | |
de1c301e | 1860 | |
7d22c717 LP |
1861 | while (i < bus->rqueue_size) { |
1862 | sd_bus_message *incoming = NULL; | |
1863 | ||
1864 | incoming = bus->rqueue[i]; | |
89ffcd2a | 1865 | |
693eb9a2 | 1866 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
1867 | /* Found a match! */ |
1868 | ||
7d22c717 LP |
1869 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1870 | bus->rqueue_size--; | |
f9f97ca6 | 1871 | log_debug_bus_message(incoming); |
7d22c717 | 1872 | |
40ca29a1 | 1873 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 1874 | |
2ce97e2b LP |
1875 | if (incoming->n_fds <= 0 || (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
1876 | if (reply) | |
1877 | *reply = incoming; | |
1878 | else | |
1879 | sd_bus_message_unref(incoming); | |
1880 | ||
1881 | return 1; | |
1882 | } | |
1883 | ||
1884 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
1885 | sd_bus_message_unref(incoming); |
1886 | return r; | |
b7f247e0 | 1887 | |
759e02e7 | 1888 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 1889 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
1890 | sd_bus_message_unref(incoming); |
1891 | return r; | |
1892 | } else { | |
a43b9ca3 | 1893 | r = -EIO; |
759e02e7 LP |
1894 | goto fail; |
1895 | } | |
a8a07f89 | 1896 | |
693eb9a2 | 1897 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
1898 | bus->unique_name && |
1899 | incoming->sender && | |
1900 | streq(bus->unique_name, incoming->sender)) { | |
1901 | ||
7d22c717 LP |
1902 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
1903 | bus->rqueue_size--; | |
1904 | ||
a8a07f89 LP |
1905 | /* Our own message? Somebody is trying |
1906 | * to send its own client a message, | |
1907 | * let's not dead-lock, let's fail | |
1908 | * immediately. */ | |
1909 | ||
1910 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
1911 | r = -ELOOP; |
1912 | goto fail; | |
de1c301e LP |
1913 | } |
1914 | ||
de1c301e | 1915 | /* Try to read more, right-away */ |
7d22c717 | 1916 | i++; |
de1c301e | 1917 | } |
7d22c717 | 1918 | |
766c5809 | 1919 | r = bus_read_message(bus, false, 0); |
32f46480 | 1920 | if (r < 0) { |
103a5027 | 1921 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1922 | bus_enter_closing(bus); |
759e02e7 | 1923 | r = -ECONNRESET; |
441d56a1 | 1924 | } |
32f46480 | 1925 | |
759e02e7 | 1926 | goto fail; |
32f46480 | 1927 | } |
7d22c717 | 1928 | if (r > 0) |
e3017af9 | 1929 | continue; |
de1c301e LP |
1930 | |
1931 | if (timeout > 0) { | |
1932 | usec_t n; | |
1933 | ||
1934 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
1935 | if (n >= timeout) { |
1936 | r = -ETIMEDOUT; | |
1937 | goto fail; | |
1938 | } | |
de1c301e LP |
1939 | |
1940 | left = timeout - n; | |
1941 | } else | |
1942 | left = (uint64_t) -1; | |
1943 | ||
e3017af9 | 1944 | r = bus_poll(bus, true, left); |
de1c301e | 1945 | if (r < 0) |
759e02e7 LP |
1946 | goto fail; |
1947 | if (r == 0) { | |
1948 | r = -ETIMEDOUT; | |
1949 | goto fail; | |
1950 | } | |
de1c301e LP |
1951 | |
1952 | r = dispatch_wqueue(bus); | |
32f46480 | 1953 | if (r < 0) { |
103a5027 | 1954 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1955 | bus_enter_closing(bus); |
759e02e7 | 1956 | r = -ECONNRESET; |
441d56a1 | 1957 | } |
32f46480 | 1958 | |
759e02e7 | 1959 | goto fail; |
32f46480 | 1960 | } |
de1c301e | 1961 | } |
759e02e7 LP |
1962 | |
1963 | fail: | |
1964 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
1965 | } |
1966 | ||
d9f644e2 | 1967 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
1968 | |
1969 | assert_return(bus, -EINVAL); | |
d6888822 LP |
1970 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
1971 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1972 | |
e82c9509 | 1973 | return bus->input_fd; |
de1c301e LP |
1974 | } |
1975 | ||
d9f644e2 | 1976 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
1977 | int flags = 0; |
1978 | ||
d6888822 | 1979 | assert_return(bus, -EINVAL); |
d6888822 | 1980 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1981 | |
a3d59cd1 LP |
1982 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
1983 | return -ENOTCONN; | |
1984 | ||
de1c301e LP |
1985 | if (bus->state == BUS_OPENING) |
1986 | flags |= POLLOUT; | |
89ffcd2a LP |
1987 | else if (bus->state == BUS_AUTHENTICATING) { |
1988 | ||
2181a7f5 | 1989 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
1990 | flags |= POLLOUT; |
1991 | ||
1992 | flags |= POLLIN; | |
1993 | ||
945c2931 | 1994 | } else if (IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)) { |
de1c301e LP |
1995 | if (bus->rqueue_size <= 0) |
1996 | flags |= POLLIN; | |
1997 | if (bus->wqueue_size > 0) | |
1998 | flags |= POLLOUT; | |
1999 | } | |
2000 | ||
2001 | return flags; | |
2002 | } | |
2003 | ||
d9f644e2 | 2004 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2005 | struct reply_callback *c; |
2006 | ||
d6888822 LP |
2007 | assert_return(bus, -EINVAL); |
2008 | assert_return(timeout_usec, -EINVAL); | |
d6888822 | 2009 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2010 | |
a3d59cd1 LP |
2011 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2012 | return -ENOTCONN; | |
2013 | ||
8f8f05a9 LP |
2014 | if (bus->track_queue) { |
2015 | *timeout_usec = 0; | |
2016 | return 1; | |
2017 | } | |
2018 | ||
718db961 LP |
2019 | if (bus->state == BUS_CLOSING) { |
2020 | *timeout_usec = 0; | |
2021 | return 1; | |
2022 | } | |
2023 | ||
e3017af9 LP |
2024 | if (bus->state == BUS_AUTHENTICATING) { |
2025 | *timeout_usec = bus->auth_timeout; | |
2026 | return 1; | |
2027 | } | |
2028 | ||
945c2931 | 2029 | if (!IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)) { |
adee69fa | 2030 | *timeout_usec = (uint64_t) -1; |
e3017af9 | 2031 | return 0; |
adee69fa | 2032 | } |
e3017af9 | 2033 | |
8efd6381 LP |
2034 | if (bus->rqueue_size > 0) { |
2035 | *timeout_usec = 0; | |
2036 | return 1; | |
2037 | } | |
2038 | ||
e3017af9 | 2039 | c = prioq_peek(bus->reply_callbacks_prioq); |
adee69fa LP |
2040 | if (!c) { |
2041 | *timeout_usec = (uint64_t) -1; | |
e3017af9 | 2042 | return 0; |
adee69fa | 2043 | } |
e3017af9 | 2044 | |
19befb2d LP |
2045 | if (c->timeout == 0) { |
2046 | *timeout_usec = (uint64_t) -1; | |
2047 | return 0; | |
2048 | } | |
2049 | ||
e3017af9 LP |
2050 | *timeout_usec = c->timeout; |
2051 | return 1; | |
2052 | } | |
2053 | ||
2054 | static int process_timeout(sd_bus *bus) { | |
4afd3348 LP |
2055 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2056 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; | |
e3017af9 | 2057 | struct reply_callback *c; |
1b64f838 | 2058 | sd_bus_slot *slot; |
e3017af9 LP |
2059 | usec_t n; |
2060 | int r; | |
2061 | ||
2062 | assert(bus); | |
2063 | ||
2064 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2065 | if (!c) | |
2066 | return 0; | |
2067 | ||
2068 | n = now(CLOCK_MONOTONIC); | |
2069 | if (c->timeout > n) | |
2070 | return 0; | |
2071 | ||
eb01ba5d LP |
2072 | r = bus_message_new_synthetic_error( |
2073 | bus, | |
693eb9a2 | 2074 | c->cookie, |
14c24659 | 2075 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2076 | &m); |
2077 | if (r < 0) | |
2078 | return r; | |
2079 | ||
7adc46fc | 2080 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2081 | if (r < 0) |
2082 | return r; | |
2083 | ||
e3017af9 | 2084 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
19befb2d LP |
2085 | c->timeout = 0; |
2086 | ||
c9fe4af7 | 2087 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2088 | c->cookie = 0; |
2089 | ||
1b64f838 | 2090 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2091 | |
313cefa1 | 2092 | bus->iteration_counter++; |
718db961 | 2093 | |
1b64f838 LP |
2094 | bus->current_message = m; |
2095 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2096 | bus->current_handler = c->callback; |
2097 | bus->current_userdata = slot->userdata; | |
19070062 | 2098 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2099 | bus->current_userdata = NULL; |
2100 | bus->current_handler = NULL; | |
d974ad05 | 2101 | bus->current_slot = NULL; |
19befb2d | 2102 | bus->current_message = NULL; |
718db961 | 2103 | |
1b64f838 LP |
2104 | if (slot->floating) { |
2105 | bus_slot_disconnect(slot); | |
2106 | sd_bus_slot_unref(slot); | |
2107 | } | |
2108 | ||
d974ad05 DH |
2109 | sd_bus_slot_unref(slot); |
2110 | ||
1b64f838 | 2111 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2112 | } |
2113 | ||
9d373862 LP |
2114 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2115 | assert(bus); | |
2116 | assert(m); | |
2117 | ||
2118 | if (bus->state != BUS_HELLO) | |
2119 | return 0; | |
2120 | ||
2121 | /* Let's make sure the first message on the bus is the HELLO | |
2122 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2123 | * here (we leave that to the usual handling), we just verify |
2124 | * we don't let any earlier msg through. */ | |
9d373862 | 2125 | |
945c2931 | 2126 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
9d373862 LP |
2127 | return -EIO; |
2128 | ||
19befb2d | 2129 | if (m->reply_cookie != 1) |
9d373862 LP |
2130 | return -EIO; |
2131 | ||
2132 | return 0; | |
2133 | } | |
2134 | ||
a652755d | 2135 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
4afd3348 LP |
2136 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; |
2137 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
19befb2d | 2138 | struct reply_callback *c; |
1b64f838 | 2139 | sd_bus_slot *slot; |
a652755d LP |
2140 | int r; |
2141 | ||
2142 | assert(bus); | |
2143 | assert(m); | |
2144 | ||
945c2931 | 2145 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
a652755d LP |
2146 | return 0; |
2147 | ||
09365592 LP |
2148 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) |
2149 | return 0; | |
2150 | ||
c9fe4af7 | 2151 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2152 | if (!c) |
2153 | return 0; | |
2154 | ||
19befb2d | 2155 | c->cookie = 0; |
19befb2d | 2156 | |
1b64f838 | 2157 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2158 | |
2ce97e2b LP |
2159 | if (m->n_fds > 0 && !(bus->hello_flags & KDBUS_HELLO_ACCEPT_FD)) { |
2160 | ||
2161 | /* If the reply contained a file descriptor which we | |
2162 | * didn't want we pass an error instead. */ | |
2163 | ||
2164 | r = bus_message_new_synthetic_error( | |
2165 | bus, | |
2166 | m->reply_cookie, | |
2167 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2168 | &synthetic_reply); | |
2169 | if (r < 0) | |
1b64f838 | 2170 | return r; |
2ce97e2b | 2171 | |
52cd5877 LP |
2172 | /* Copy over original timestamp */ |
2173 | synthetic_reply->realtime = m->realtime; | |
2174 | synthetic_reply->monotonic = m->monotonic; | |
2175 | synthetic_reply->seqnum = m->seqnum; | |
2176 | ||
2ce97e2b LP |
2177 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2178 | if (r < 0) | |
1b64f838 | 2179 | return r; |
2ce97e2b LP |
2180 | |
2181 | m = synthetic_reply; | |
2182 | } else { | |
2183 | r = sd_bus_message_rewind(m, true); | |
2184 | if (r < 0) | |
1b64f838 | 2185 | return r; |
2ce97e2b | 2186 | } |
88fe224c | 2187 | |
1b64f838 LP |
2188 | if (c->timeout != 0) { |
2189 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2190 | c->timeout = 0; | |
2191 | } | |
19befb2d | 2192 | |
1b64f838 | 2193 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2194 | bus->current_handler = c->callback; |
2195 | bus->current_userdata = slot->userdata; | |
19070062 | 2196 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2197 | bus->current_userdata = NULL; |
2198 | bus->current_handler = NULL; | |
d974ad05 | 2199 | bus->current_slot = NULL; |
a652755d | 2200 | |
19befb2d LP |
2201 | if (slot->floating) { |
2202 | bus_slot_disconnect(slot); | |
2203 | sd_bus_slot_unref(slot); | |
2204 | } | |
2205 | ||
d974ad05 DH |
2206 | sd_bus_slot_unref(slot); |
2207 | ||
1b64f838 | 2208 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2209 | } |
2210 | ||
2211 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
4afd3348 | 2212 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2213 | struct filter_callback *l; |
2214 | int r; | |
2215 | ||
392d5b37 LP |
2216 | assert(bus); |
2217 | assert(m); | |
2218 | ||
7286037f LP |
2219 | do { |
2220 | bus->filter_callbacks_modified = false; | |
2221 | ||
2222 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2223 | sd_bus_slot *slot; |
7286037f LP |
2224 | |
2225 | if (bus->filter_callbacks_modified) | |
2226 | break; | |
2227 | ||
2228 | /* Don't run this more than once per iteration */ | |
2229 | if (l->last_iteration == bus->iteration_counter) | |
2230 | continue; | |
2231 | ||
2232 | l->last_iteration = bus->iteration_counter; | |
2233 | ||
88fe224c LP |
2234 | r = sd_bus_message_rewind(m, true); |
2235 | if (r < 0) | |
2236 | return r; | |
2237 | ||
1b64f838 LP |
2238 | slot = container_of(l, sd_bus_slot, filter_callback); |
2239 | ||
2240 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2241 | bus->current_handler = l->callback; |
2242 | bus->current_userdata = slot->userdata; | |
19070062 | 2243 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2244 | bus->current_userdata = NULL; |
2245 | bus->current_handler = NULL; | |
1b64f838 | 2246 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2247 | |
ebcf1f97 | 2248 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2249 | if (r != 0) |
2250 | return r; | |
2251 | ||
2252 | } | |
2253 | ||
2254 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2255 | |
2256 | return 0; | |
2257 | } | |
2258 | ||
392d5b37 | 2259 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2260 | int r; |
2261 | ||
392d5b37 LP |
2262 | assert(bus); |
2263 | assert(m); | |
2264 | ||
7286037f LP |
2265 | do { |
2266 | bus->match_callbacks_modified = false; | |
2267 | ||
eb01ba5d | 2268 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2269 | if (r != 0) |
2270 | return r; | |
2271 | ||
2272 | } while (bus->match_callbacks_modified); | |
2273 | ||
2274 | return 0; | |
392d5b37 LP |
2275 | } |
2276 | ||
b9bf7e2b | 2277 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
4afd3348 | 2278 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
b9bf7e2b LP |
2279 | int r; |
2280 | ||
2281 | assert(bus); | |
2282 | assert(m); | |
2283 | ||
09365592 LP |
2284 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2285 | return 0; | |
2286 | ||
758bf0c7 LP |
2287 | if (bus->manual_peer_interface) |
2288 | return 0; | |
2289 | ||
40ca29a1 | 2290 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2291 | return 0; |
2292 | ||
2293 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2294 | return 0; | |
2295 | ||
0461f8cd | 2296 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2297 | return 1; |
2298 | ||
2299 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2300 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2301 | else if (streq_ptr(m->member, "GetMachineId")) { |
2302 | sd_id128_t id; | |
2303 | char sid[33]; | |
2304 | ||
2305 | r = sd_id128_get_machine(&id); | |
2306 | if (r < 0) | |
2307 | return r; | |
2308 | ||
df2d202e | 2309 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2310 | if (r < 0) |
2311 | return r; | |
2312 | ||
2313 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2314 | } else { | |
29ddb38f | 2315 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2316 | m, &reply, |
40ca29a1 | 2317 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2318 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2319 | } |
2320 | ||
2321 | if (r < 0) | |
2322 | return r; | |
2323 | ||
2324 | r = sd_bus_send(bus, reply, NULL); | |
2325 | if (r < 0) | |
2326 | return r; | |
2327 | ||
2328 | return 1; | |
2329 | } | |
2330 | ||
2ce97e2b LP |
2331 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2332 | assert(bus); | |
2333 | assert(m); | |
2334 | ||
2335 | /* If we got a message with a file descriptor which we didn't | |
2336 | * want to accept, then let's drop it. How can this even | |
2337 | * happen? For example, when the kernel queues a message into | |
2338 | * an activatable names's queue which allows fds, and then is | |
2339 | * delivered to us later even though we ourselves did not | |
2340 | * negotiate it. */ | |
2341 | ||
09365592 LP |
2342 | if (bus->hello_flags & KDBUS_HELLO_MONITOR) |
2343 | return 0; | |
2344 | ||
2ce97e2b LP |
2345 | if (m->n_fds <= 0) |
2346 | return 0; | |
2347 | ||
2348 | if (bus->hello_flags & KDBUS_HELLO_ACCEPT_FD) | |
2349 | return 0; | |
2350 | ||
2351 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2352 | return 1; /* just eat it up */ | |
2353 | ||
2354 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2355 | } | |
2356 | ||
992c052c | 2357 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2358 | int r; |
2359 | ||
2360 | assert(bus); | |
992c052c | 2361 | assert(m); |
e3017af9 | 2362 | |
19befb2d | 2363 | bus->current_message = m; |
992c052c | 2364 | bus->iteration_counter++; |
e3017af9 | 2365 | |
f9f97ca6 | 2366 | log_debug_bus_message(m); |
40ca29a1 | 2367 | |
992c052c LP |
2368 | r = process_hello(bus, m); |
2369 | if (r != 0) | |
affff0b6 | 2370 | goto finish; |
a652755d | 2371 | |
992c052c LP |
2372 | r = process_reply(bus, m); |
2373 | if (r != 0) | |
affff0b6 | 2374 | goto finish; |
e3017af9 | 2375 | |
2ce97e2b LP |
2376 | r = process_fd_check(bus, m); |
2377 | if (r != 0) | |
2378 | goto finish; | |
2379 | ||
992c052c LP |
2380 | r = process_filter(bus, m); |
2381 | if (r != 0) | |
affff0b6 | 2382 | goto finish; |
a652755d | 2383 | |
992c052c LP |
2384 | r = process_match(bus, m); |
2385 | if (r != 0) | |
affff0b6 | 2386 | goto finish; |
a652755d | 2387 | |
992c052c LP |
2388 | r = process_builtin(bus, m); |
2389 | if (r != 0) | |
affff0b6 LP |
2390 | goto finish; |
2391 | ||
2392 | r = bus_process_object(bus, m); | |
a652755d | 2393 | |
affff0b6 | 2394 | finish: |
19befb2d | 2395 | bus->current_message = NULL; |
affff0b6 | 2396 | return r; |
29ddb38f | 2397 | } |
88fe224c | 2398 | |
8f8f05a9 LP |
2399 | static int dispatch_track(sd_bus *bus) { |
2400 | assert(bus); | |
2401 | ||
2402 | if (!bus->track_queue) | |
2403 | return 0; | |
2404 | ||
2405 | bus_track_dispatch(bus->track_queue); | |
2406 | return 1; | |
2407 | } | |
2408 | ||
766c5809 | 2409 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
4afd3348 | 2410 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
29ddb38f | 2411 | int r; |
a652755d | 2412 | |
29ddb38f | 2413 | assert(bus); |
945c2931 | 2414 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
7286037f | 2415 | |
992c052c LP |
2416 | r = process_timeout(bus); |
2417 | if (r != 0) | |
2418 | goto null_message; | |
7286037f | 2419 | |
992c052c LP |
2420 | r = dispatch_wqueue(bus); |
2421 | if (r != 0) | |
2422 | goto null_message; | |
7286037f | 2423 | |
8f8f05a9 LP |
2424 | r = dispatch_track(bus); |
2425 | if (r != 0) | |
2426 | goto null_message; | |
2427 | ||
766c5809 | 2428 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2429 | if (r < 0) |
2430 | return r; | |
2431 | if (!m) | |
2432 | goto null_message; | |
7286037f | 2433 | |
992c052c LP |
2434 | r = process_message(bus, m); |
2435 | if (r != 0) | |
2436 | goto null_message; | |
7286037f | 2437 | |
992c052c LP |
2438 | if (ret) { |
2439 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2440 | if (r < 0) |
2441 | return r; | |
e3017af9 | 2442 | |
992c052c LP |
2443 | *ret = m; |
2444 | m = NULL; | |
2445 | return 1; | |
2446 | } | |
a652755d | 2447 | |
40ca29a1 | 2448 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2449 | |
dc74ce9b LP |
2450 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2451 | strna(sd_bus_message_get_sender(m)), | |
2452 | strna(sd_bus_message_get_path(m)), | |
2453 | strna(sd_bus_message_get_interface(m)), | |
2454 | strna(sd_bus_message_get_member(m))); | |
2455 | ||
992c052c | 2456 | r = sd_bus_reply_method_errorf( |
df2d202e | 2457 | m, |
40ca29a1 | 2458 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2459 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2460 | if (r < 0) |
2461 | return r; | |
2462 | } | |
e3017af9 | 2463 | |
992c052c | 2464 | return 1; |
0a72c2bd | 2465 | |
992c052c LP |
2466 | null_message: |
2467 | if (r >= 0 && ret) | |
2468 | *ret = NULL; | |
0a72c2bd | 2469 | |
992c052c | 2470 | return r; |
29ddb38f | 2471 | } |
0a72c2bd | 2472 | |
fbb4603d LP |
2473 | static int bus_exit_now(sd_bus *bus) { |
2474 | assert(bus); | |
2475 | ||
2476 | /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes | |
2477 | * sd_event_exit(), otherwise invokes libc exit(). */ | |
2478 | ||
2479 | if (bus->exited) /* did we already exit? */ | |
2480 | return 0; | |
2481 | if (!bus->exit_triggered) /* was the exit condition triggered? */ | |
2482 | return 0; | |
2483 | if (!bus->exit_on_disconnect) /* Shall we actually exit on disconnection? */ | |
2484 | return 0; | |
2485 | ||
2486 | bus->exited = true; /* never exit more than once */ | |
2487 | ||
2488 | log_debug("Bus connection disconnected, exiting."); | |
2489 | ||
2490 | if (bus->event) | |
2491 | return sd_event_exit(bus->event, EXIT_FAILURE); | |
2492 | else | |
2493 | exit(EXIT_FAILURE); | |
2494 | ||
2495 | assert_not_reached("exit() didn't exit?"); | |
2496 | } | |
2497 | ||
217fcc7e LP |
2498 | static int process_closing_reply_callback(sd_bus *bus, struct reply_callback *c) { |
2499 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
4afd3348 | 2500 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
217fcc7e | 2501 | sd_bus_slot *slot; |
718db961 LP |
2502 | int r; |
2503 | ||
2504 | assert(bus); | |
217fcc7e | 2505 | assert(c); |
718db961 | 2506 | |
217fcc7e LP |
2507 | r = bus_message_new_synthetic_error( |
2508 | bus, | |
2509 | c->cookie, | |
2510 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), | |
2511 | &m); | |
2512 | if (r < 0) | |
2513 | return r; | |
ebcf1f97 | 2514 | |
217fcc7e LP |
2515 | r = bus_seal_synthetic_message(bus, m); |
2516 | if (r < 0) | |
2517 | return r; | |
718db961 | 2518 | |
217fcc7e LP |
2519 | if (c->timeout != 0) { |
2520 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); | |
2521 | c->timeout = 0; | |
2522 | } | |
718db961 | 2523 | |
217fcc7e LP |
2524 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
2525 | c->cookie = 0; | |
2526 | ||
2527 | slot = container_of(c, sd_bus_slot, reply_callback); | |
718db961 | 2528 | |
217fcc7e | 2529 | bus->iteration_counter++; |
19befb2d | 2530 | |
217fcc7e LP |
2531 | bus->current_message = m; |
2532 | bus->current_slot = sd_bus_slot_ref(slot); | |
2533 | bus->current_handler = c->callback; | |
2534 | bus->current_userdata = slot->userdata; | |
2535 | r = c->callback(m, slot->userdata, &error_buffer); | |
2536 | bus->current_userdata = NULL; | |
2537 | bus->current_handler = NULL; | |
2538 | bus->current_slot = NULL; | |
2539 | bus->current_message = NULL; | |
718db961 | 2540 | |
217fcc7e LP |
2541 | if (slot->floating) { |
2542 | bus_slot_disconnect(slot); | |
2543 | sd_bus_slot_unref(slot); | |
2544 | } | |
718db961 | 2545 | |
217fcc7e | 2546 | sd_bus_slot_unref(slot); |
1b64f838 | 2547 | |
217fcc7e LP |
2548 | return bus_maybe_reply_error(m, r, &error_buffer); |
2549 | } | |
718db961 | 2550 | |
217fcc7e LP |
2551 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2552 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
2553 | struct reply_callback *c; | |
2554 | int r; | |
d974ad05 | 2555 | |
217fcc7e LP |
2556 | assert(bus); |
2557 | assert(bus->state == BUS_CLOSING); | |
2558 | ||
2559 | /* First, fail all outstanding method calls */ | |
2560 | c = ordered_hashmap_first(bus->reply_callbacks); | |
2561 | if (c) | |
2562 | return process_closing_reply_callback(bus, c); | |
718db961 | 2563 | |
232f3677 LP |
2564 | /* Then, fake-drop all remaining bus tracking references */ |
2565 | if (bus->tracks) { | |
2566 | bus_track_close(bus->tracks); | |
2567 | return 1; | |
2568 | } | |
2569 | ||
718db961 LP |
2570 | /* Then, synthesize a Disconnected message */ |
2571 | r = sd_bus_message_new_signal( | |
2572 | bus, | |
151b9b96 | 2573 | &m, |
718db961 LP |
2574 | "/org/freedesktop/DBus/Local", |
2575 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2576 | "Disconnected"); |
718db961 LP |
2577 | if (r < 0) |
2578 | return r; | |
2579 | ||
fb6d9b77 | 2580 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2581 | |
7adc46fc | 2582 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2583 | if (r < 0) |
2584 | return r; | |
2585 | ||
2586 | sd_bus_close(bus); | |
2587 | ||
19befb2d | 2588 | bus->current_message = m; |
718db961 LP |
2589 | bus->iteration_counter++; |
2590 | ||
2591 | r = process_filter(bus, m); | |
2592 | if (r != 0) | |
2593 | goto finish; | |
2594 | ||
2595 | r = process_match(bus, m); | |
2596 | if (r != 0) | |
2597 | goto finish; | |
2598 | ||
fbb4603d LP |
2599 | /* Nothing else to do, exit now, if the condition holds */ |
2600 | bus->exit_triggered = true; | |
2601 | (void) bus_exit_now(bus); | |
2602 | ||
718db961 LP |
2603 | if (ret) { |
2604 | *ret = m; | |
2605 | m = NULL; | |
2606 | } | |
2607 | ||
2608 | r = 1; | |
2609 | ||
2610 | finish: | |
19befb2d LP |
2611 | bus->current_message = NULL; |
2612 | ||
718db961 LP |
2613 | return r; |
2614 | } | |
2615 | ||
766c5809 | 2616 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2617 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2618 | int r; |
0a72c2bd | 2619 | |
992c052c LP |
2620 | /* Returns 0 when we didn't do anything. This should cause the |
2621 | * caller to invoke sd_bus_wait() before returning the next | |
2622 | * time. Returns > 0 when we did something, which possibly | |
2623 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2624 | |
d6888822 LP |
2625 | assert_return(bus, -EINVAL); |
2626 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
0a72c2bd | 2627 | |
992c052c | 2628 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2629 | assert_return(!bus->current_message, -EBUSY); |
2630 | assert(!bus->current_slot); | |
0a72c2bd | 2631 | |
992c052c | 2632 | switch (bus->state) { |
0a72c2bd | 2633 | |
992c052c | 2634 | case BUS_UNSET: |
992c052c | 2635 | return -ENOTCONN; |
0a72c2bd | 2636 | |
6d6f4904 LP |
2637 | case BUS_CLOSED: |
2638 | return -ECONNRESET; | |
2639 | ||
992c052c LP |
2640 | case BUS_OPENING: |
2641 | r = bus_socket_process_opening(bus); | |
103a5027 | 2642 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
718db961 LP |
2643 | bus_enter_closing(bus); |
2644 | r = 1; | |
2645 | } else if (r < 0) | |
29ddb38f | 2646 | return r; |
992c052c LP |
2647 | if (ret) |
2648 | *ret = NULL; | |
a652755d LP |
2649 | return r; |
2650 | ||
992c052c | 2651 | case BUS_AUTHENTICATING: |
992c052c | 2652 | r = bus_socket_process_authenticating(bus); |
103a5027 | 2653 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
718db961 LP |
2654 | bus_enter_closing(bus); |
2655 | r = 1; | |
2656 | } else if (r < 0) | |
29ddb38f | 2657 | return r; |
718db961 | 2658 | |
992c052c LP |
2659 | if (ret) |
2660 | *ret = NULL; | |
718db961 | 2661 | |
992c052c | 2662 | return r; |
a652755d | 2663 | |
992c052c LP |
2664 | case BUS_RUNNING: |
2665 | case BUS_HELLO: | |
766c5809 | 2666 | r = process_running(bus, hint_priority, priority, ret); |
103a5027 | 2667 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
718db961 LP |
2668 | bus_enter_closing(bus); |
2669 | r = 1; | |
2670 | ||
2671 | if (ret) | |
2672 | *ret = NULL; | |
2673 | } | |
43a43f50 | 2674 | |
43a43f50 | 2675 | return r; |
718db961 LP |
2676 | |
2677 | case BUS_CLOSING: | |
2678 | return process_closing(bus, ret); | |
992c052c | 2679 | } |
43a43f50 | 2680 | |
992c052c | 2681 | assert_not_reached("Unknown state"); |
e3017af9 LP |
2682 | } |
2683 | ||
766c5809 LP |
2684 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2685 | return bus_process_internal(bus, false, 0, ret); | |
2686 | } | |
2687 | ||
2688 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2689 | return bus_process_internal(bus, true, priority, ret); | |
2690 | } | |
2691 | ||
992c052c LP |
2692 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2693 | struct pollfd p[2] = {}; | |
2694 | int r, e, n; | |
2695 | struct timespec ts; | |
3a43da28 | 2696 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2697 | |
2698 | assert(bus); | |
718db961 LP |
2699 | |
2700 | if (bus->state == BUS_CLOSING) | |
2701 | return 1; | |
2702 | ||
a3d59cd1 LP |
2703 | if (!BUS_IS_OPEN(bus->state)) |
2704 | return -ENOTCONN; | |
adcdb374 | 2705 | |
992c052c LP |
2706 | e = sd_bus_get_events(bus); |
2707 | if (e < 0) | |
2708 | return e; | |
adcdb374 | 2709 | |
992c052c | 2710 | if (need_more) |
8efd6381 LP |
2711 | /* The caller really needs some more data, he doesn't |
2712 | * care about what's already read, or any timeouts | |
ad67ef27 | 2713 | * except its own. */ |
992c052c | 2714 | e |= POLLIN; |
992c052c | 2715 | else { |
8efd6381 LP |
2716 | usec_t until; |
2717 | /* The caller wants to process if there's something to | |
2718 | * process, but doesn't care otherwise */ | |
2719 | ||
2720 | r = sd_bus_get_timeout(bus, &until); | |
2721 | if (r < 0) | |
2722 | return r; | |
2723 | if (r > 0) { | |
2724 | usec_t nw; | |
2725 | nw = now(CLOCK_MONOTONIC); | |
2726 | m = until > nw ? until - nw : 0; | |
2727 | } | |
992c052c | 2728 | } |
adcdb374 | 2729 | |
992c052c LP |
2730 | if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m)) |
2731 | m = timeout_usec; | |
adcdb374 | 2732 | |
992c052c LP |
2733 | p[0].fd = bus->input_fd; |
2734 | if (bus->output_fd == bus->input_fd) { | |
2735 | p[0].events = e; | |
2736 | n = 1; | |
2737 | } else { | |
2738 | p[0].events = e & POLLIN; | |
2739 | p[1].fd = bus->output_fd; | |
2740 | p[1].events = e & POLLOUT; | |
2741 | n = 2; | |
adcdb374 LP |
2742 | } |
2743 | ||
992c052c | 2744 | r = ppoll(p, n, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL); |
adcdb374 | 2745 | if (r < 0) |
992c052c | 2746 | return -errno; |
adcdb374 | 2747 | |
992c052c | 2748 | return r > 0 ? 1 : 0; |
adcdb374 LP |
2749 | } |
2750 | ||
d9f644e2 | 2751 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 2752 | |
d6888822 | 2753 | assert_return(bus, -EINVAL); |
d6888822 | 2754 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2755 | |
718db961 LP |
2756 | if (bus->state == BUS_CLOSING) |
2757 | return 0; | |
2758 | ||
a3d59cd1 LP |
2759 | if (!BUS_IS_OPEN(bus->state)) |
2760 | return -ENOTCONN; | |
718db961 | 2761 | |
992c052c LP |
2762 | if (bus->rqueue_size > 0) |
2763 | return 0; | |
9db76355 | 2764 | |
992c052c LP |
2765 | return bus_poll(bus, false, timeout_usec); |
2766 | } | |
9db76355 | 2767 | |
d9f644e2 | 2768 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 2769 | int r; |
9db76355 | 2770 | |
d6888822 | 2771 | assert_return(bus, -EINVAL); |
d6888822 | 2772 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 2773 | |
718db961 LP |
2774 | if (bus->state == BUS_CLOSING) |
2775 | return 0; | |
2776 | ||
a3d59cd1 LP |
2777 | if (!BUS_IS_OPEN(bus->state)) |
2778 | return -ENOTCONN; | |
718db961 | 2779 | |
992c052c LP |
2780 | r = bus_ensure_running(bus); |
2781 | if (r < 0) | |
2782 | return r; | |
9db76355 | 2783 | |
992c052c LP |
2784 | if (bus->wqueue_size <= 0) |
2785 | return 0; | |
9db76355 | 2786 | |
992c052c LP |
2787 | for (;;) { |
2788 | r = dispatch_wqueue(bus); | |
32f46480 | 2789 | if (r < 0) { |
103a5027 | 2790 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2791 | bus_enter_closing(bus); |
441d56a1 LP |
2792 | return -ECONNRESET; |
2793 | } | |
32f46480 | 2794 | |
9db76355 | 2795 | return r; |
32f46480 | 2796 | } |
9db76355 | 2797 | |
992c052c LP |
2798 | if (bus->wqueue_size <= 0) |
2799 | return 0; | |
9db76355 | 2800 | |
992c052c | 2801 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
2802 | if (r < 0) |
2803 | return r; | |
9db76355 | 2804 | } |
9db76355 LP |
2805 | } |
2806 | ||
19befb2d LP |
2807 | _public_ int sd_bus_add_filter( |
2808 | sd_bus *bus, | |
2809 | sd_bus_slot **slot, | |
2810 | sd_bus_message_handler_t callback, | |
2811 | void *userdata) { | |
d9f644e2 | 2812 | |
19befb2d | 2813 | sd_bus_slot *s; |
de1c301e | 2814 | |
d6888822 LP |
2815 | assert_return(bus, -EINVAL); |
2816 | assert_return(callback, -EINVAL); | |
2817 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2818 | |
19befb2d LP |
2819 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
2820 | if (!s) | |
29ddb38f LP |
2821 | return -ENOMEM; |
2822 | ||
19befb2d | 2823 | s->filter_callback.callback = callback; |
a652755d | 2824 | |
19befb2d LP |
2825 | bus->filter_callbacks_modified = true; |
2826 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 2827 | |
19befb2d LP |
2828 | if (slot) |
2829 | *slot = s; | |
29ddb38f | 2830 | |
992c052c | 2831 | return 0; |
a652755d | 2832 | } |
392d5b37 | 2833 | |
19befb2d LP |
2834 | _public_ int sd_bus_add_match( |
2835 | sd_bus *bus, | |
2836 | sd_bus_slot **slot, | |
2837 | const char *match, | |
2838 | sd_bus_message_handler_t callback, | |
2839 | void *userdata) { | |
d9f644e2 | 2840 | |
992c052c LP |
2841 | struct bus_match_component *components = NULL; |
2842 | unsigned n_components = 0; | |
2915234d | 2843 | sd_bus_slot *s = NULL; |
992c052c | 2844 | int r = 0; |
392d5b37 | 2845 | |
d6888822 LP |
2846 | assert_return(bus, -EINVAL); |
2847 | assert_return(match, -EINVAL); | |
2848 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 2849 | |
992c052c LP |
2850 | r = bus_match_parse(match, &components, &n_components); |
2851 | if (r < 0) | |
2852 | goto finish; | |
29ddb38f | 2853 | |
19befb2d LP |
2854 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
2855 | if (!s) { | |
2856 | r = -ENOMEM; | |
2857 | goto finish; | |
2858 | } | |
2859 | ||
2860 | s->match_callback.callback = callback; | |
19befb2d | 2861 | |
992c052c | 2862 | if (bus->bus_client) { |
cc65fe5e | 2863 | enum bus_match_scope scope; |
29ddb38f | 2864 | |
cc65fe5e | 2865 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 2866 | |
cc65fe5e | 2867 | /* Do not install server-side matches for matches |
a132bef0 | 2868 | * against the local service, interface or bus path. */ |
9ee7a50c | 2869 | if (scope != BUS_MATCH_LOCAL) { |
cc65fe5e | 2870 | |
a132bef0 ZJS |
2871 | /* We store the original match string, so that |
2872 | * we can use it to remove the match again. */ | |
cc65fe5e | 2873 | |
a132bef0 ZJS |
2874 | s->match_callback.match_string = strdup(match); |
2875 | if (!s->match_callback.match_string) { | |
2876 | r = -ENOMEM; | |
2877 | goto finish; | |
19befb2d | 2878 | } |
19befb2d | 2879 | |
532f808f | 2880 | r = bus_add_match_internal(bus, s->match_callback.match_string, components, n_components); |
cc65fe5e LP |
2881 | if (r < 0) |
2882 | goto finish; | |
2883 | ||
2884 | s->match_added = true; | |
2885 | } | |
392d5b37 LP |
2886 | } |
2887 | ||
992c052c | 2888 | bus->match_callbacks_modified = true; |
19befb2d LP |
2889 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
2890 | if (r < 0) | |
2891 | goto finish; | |
2892 | ||
2893 | if (slot) | |
2894 | *slot = s; | |
2895 | s = NULL; | |
917b5dc7 | 2896 | |
992c052c LP |
2897 | finish: |
2898 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
2899 | sd_bus_slot_unref(s); |
2900 | ||
992c052c | 2901 | return r; |
917b5dc7 LP |
2902 | } |
2903 | ||
19befb2d LP |
2904 | int bus_remove_match_by_string( |
2905 | sd_bus *bus, | |
2906 | const char *match, | |
2907 | sd_bus_message_handler_t callback, | |
2908 | void *userdata) { | |
d9f644e2 | 2909 | |
992c052c LP |
2910 | struct bus_match_component *components = NULL; |
2911 | unsigned n_components = 0; | |
19befb2d LP |
2912 | struct match_callback *c; |
2913 | int r = 0; | |
917b5dc7 | 2914 | |
d6888822 LP |
2915 | assert_return(bus, -EINVAL); |
2916 | assert_return(match, -EINVAL); | |
2917 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
917b5dc7 | 2918 | |
992c052c | 2919 | r = bus_match_parse(match, &components, &n_components); |
29ddb38f | 2920 | if (r < 0) |
19befb2d | 2921 | goto finish; |
f10dda3b | 2922 | |
19befb2d LP |
2923 | r = bus_match_find(&bus->match_callbacks, components, n_components, NULL, NULL, &c); |
2924 | if (r <= 0) | |
2925 | goto finish; | |
f10dda3b | 2926 | |
19befb2d | 2927 | sd_bus_slot_unref(container_of(c, sd_bus_slot, match_callback)); |
f10dda3b | 2928 | |
19befb2d | 2929 | finish: |
992c052c | 2930 | bus_match_parse_free(components, n_components); |
f10dda3b | 2931 | |
19befb2d | 2932 | return r; |
f10dda3b LP |
2933 | } |
2934 | ||
992c052c LP |
2935 | bool bus_pid_changed(sd_bus *bus) { |
2936 | assert(bus); | |
f10dda3b | 2937 | |
992c052c LP |
2938 | /* We don't support people creating a bus connection and |
2939 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 2940 | |
df0ff127 | 2941 | return bus->original_pid != getpid_cached(); |
d5a2b9a6 | 2942 | } |
40ca29a1 LP |
2943 | |
2944 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 2945 | sd_bus *bus = userdata; |
40ca29a1 LP |
2946 | int r; |
2947 | ||
2948 | assert(bus); | |
2949 | ||
2950 | r = sd_bus_process(bus, NULL); | |
2951 | if (r < 0) | |
2952 | return r; | |
2953 | ||
2954 | return 1; | |
2955 | } | |
2956 | ||
2957 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 2958 | sd_bus *bus = userdata; |
40ca29a1 LP |
2959 | int r; |
2960 | ||
2961 | assert(bus); | |
2962 | ||
2963 | r = sd_bus_process(bus, NULL); | |
2964 | if (r < 0) | |
2965 | return r; | |
2966 | ||
2967 | return 1; | |
2968 | } | |
2969 | ||
2970 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
2971 | sd_bus *bus = userdata; | |
2972 | int r, e; | |
2973 | usec_t until; | |
2974 | ||
2975 | assert(s); | |
2976 | assert(bus); | |
2977 | ||
2978 | e = sd_bus_get_events(bus); | |
2979 | if (e < 0) | |
2980 | return e; | |
2981 | ||
2982 | if (bus->output_fd != bus->input_fd) { | |
2983 | ||
2984 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
2985 | if (r < 0) | |
2986 | return r; | |
2987 | ||
2988 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
2989 | if (r < 0) | |
2990 | return r; | |
2991 | } else { | |
2992 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); | |
2993 | if (r < 0) | |
2994 | return r; | |
2995 | } | |
2996 | ||
2997 | r = sd_bus_get_timeout(bus, &until); | |
2998 | if (r < 0) | |
2999 | return r; | |
3000 | if (r > 0) { | |
3001 | int j; | |
3002 | ||
3003 | j = sd_event_source_set_time(bus->time_event_source, until); | |
3004 | if (j < 0) | |
3005 | return j; | |
3006 | } | |
3007 | ||
3008 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3009 | if (r < 0) | |
3010 | return r; | |
3011 | ||
3012 | return 1; | |
3013 | } | |
3014 | ||
abc5fe72 LP |
3015 | static int quit_callback(sd_event_source *event, void *userdata) { |
3016 | sd_bus *bus = userdata; | |
3017 | ||
3018 | assert(event); | |
3019 | ||
3020 | sd_bus_flush(bus); | |
7bb4d371 | 3021 | sd_bus_close(bus); |
abc5fe72 LP |
3022 | |
3023 | return 1; | |
3024 | } | |
3025 | ||
1e05d493 LP |
3026 | static int attach_io_events(sd_bus *bus) { |
3027 | int r; | |
3028 | ||
3029 | assert(bus); | |
3030 | ||
3031 | if (bus->input_fd < 0) | |
3032 | return 0; | |
3033 | ||
3034 | if (!bus->event) | |
3035 | return 0; | |
3036 | ||
3037 | if (!bus->input_io_event_source) { | |
151b9b96 | 3038 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3039 | if (r < 0) |
3040 | return r; | |
3041 | ||
3042 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3043 | if (r < 0) | |
3044 | return r; | |
3045 | ||
3046 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3047 | if (r < 0) |
3048 | return r; | |
3049 | ||
356779df | 3050 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3051 | } else |
3052 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3053 | ||
3054 | if (r < 0) | |
3055 | return r; | |
3056 | ||
3057 | if (bus->output_fd != bus->input_fd) { | |
3058 | assert(bus->output_fd >= 0); | |
3059 | ||
3060 | if (!bus->output_io_event_source) { | |
151b9b96 | 3061 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3062 | if (r < 0) |
3063 | return r; | |
3064 | ||
3065 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3066 | if (r < 0) |
3067 | return r; | |
3068 | ||
356779df | 3069 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3070 | } else |
3071 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3072 | ||
3073 | if (r < 0) | |
3074 | return r; | |
3075 | } | |
3076 | ||
3077 | return 0; | |
3078 | } | |
3079 | ||
3080 | static void detach_io_events(sd_bus *bus) { | |
3081 | assert(bus); | |
3082 | ||
3083 | if (bus->input_io_event_source) { | |
3084 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3085 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3086 | } | |
3087 | ||
3088 | if (bus->output_io_event_source) { | |
3089 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3090 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3091 | } | |
3092 | } | |
3093 | ||
d9f644e2 | 3094 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3095 | int r; |
3096 | ||
3097 | assert_return(bus, -EINVAL); | |
40ca29a1 LP |
3098 | assert_return(!bus->event, -EBUSY); |
3099 | ||
3100 | assert(!bus->input_io_event_source); | |
3101 | assert(!bus->output_io_event_source); | |
3102 | assert(!bus->time_event_source); | |
3103 | ||
76b54375 LP |
3104 | if (event) |
3105 | bus->event = sd_event_ref(event); | |
3106 | else { | |
3107 | r = sd_event_default(&bus->event); | |
3108 | if (r < 0) | |
3109 | return r; | |
3110 | } | |
40ca29a1 | 3111 | |
1e05d493 | 3112 | bus->event_priority = priority; |
40ca29a1 | 3113 | |
6a0f1f6d | 3114 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3115 | if (r < 0) |
3116 | goto fail; | |
3117 | ||
3118 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3119 | if (r < 0) | |
3120 | goto fail; | |
3121 | ||
356779df | 3122 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3123 | if (r < 0) |
3124 | goto fail; | |
3125 | ||
151b9b96 | 3126 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3127 | if (r < 0) |
3128 | goto fail; | |
3129 | ||
356779df | 3130 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3131 | if (r < 0) |
3132 | goto fail; | |
3133 | ||
1e05d493 LP |
3134 | r = attach_io_events(bus); |
3135 | if (r < 0) | |
3136 | goto fail; | |
3137 | ||
40ca29a1 LP |
3138 | return 0; |
3139 | ||
3140 | fail: | |
3141 | sd_bus_detach_event(bus); | |
3142 | return r; | |
3143 | } | |
3144 | ||
d9f644e2 | 3145 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3146 | assert_return(bus, -EINVAL); |
a82cafb9 LP |
3147 | |
3148 | if (!bus->event) | |
3149 | return 0; | |
40ca29a1 | 3150 | |
1e05d493 | 3151 | detach_io_events(bus); |
40ca29a1 | 3152 | |
86befb40 LP |
3153 | if (bus->time_event_source) { |
3154 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3155 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3156 | } |
40ca29a1 | 3157 | |
86befb40 LP |
3158 | if (bus->quit_event_source) { |
3159 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3160 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3161 | } |
abc5fe72 | 3162 | |
93f1bcf4 | 3163 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3164 | return 1; |
40ca29a1 | 3165 | } |
affff0b6 | 3166 | |
2be44176 LP |
3167 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3168 | assert_return(bus, NULL); | |
3169 | ||
3170 | return bus->event; | |
3171 | } | |
3172 | ||
19befb2d LP |
3173 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3174 | assert_return(bus, NULL); | |
3175 | ||
3176 | return bus->current_message; | |
3177 | } | |
3178 | ||
3179 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3180 | assert_return(bus, NULL); |
3181 | ||
19befb2d | 3182 | return bus->current_slot; |
affff0b6 | 3183 | } |
76b54375 | 3184 | |
caa82984 LP |
3185 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3186 | assert_return(bus, NULL); | |
3187 | ||
3188 | return bus->current_handler; | |
3189 | } | |
3190 | ||
3191 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3192 | assert_return(bus, NULL); | |
3193 | ||
3194 | return bus->current_userdata; | |
3195 | } | |
3196 | ||
76b54375 LP |
3197 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3198 | sd_bus *b = NULL; | |
3199 | int r; | |
3200 | ||
3201 | assert(bus_open); | |
3202 | assert(default_bus); | |
3203 | ||
3204 | if (!ret) | |
3205 | return !!*default_bus; | |
3206 | ||
3207 | if (*default_bus) { | |
3208 | *ret = sd_bus_ref(*default_bus); | |
3209 | return 0; | |
3210 | } | |
3211 | ||
3212 | r = bus_open(&b); | |
3213 | if (r < 0) | |
3214 | return r; | |
3215 | ||
3216 | b->default_bus_ptr = default_bus; | |
3217 | b->tid = gettid(); | |
3218 | *default_bus = b; | |
3219 | ||
3220 | *ret = b; | |
3221 | return 1; | |
3222 | } | |
3223 | ||
3224 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3225 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3226 | } | |
3227 | ||
76b54375 | 3228 | |
fa2f8973 | 3229 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
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) { | |
af08d2f9 LP |
3256 | |
3257 | return bus_default(sd_bus_open, &default_starter_bus, ret); | |
3258 | } | |
3259 | ||
3260 | /* Finally, if nothing is set use the cached connection for | |
3261 | * the right scope */ | |
3262 | ||
3263 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
3264 | return sd_bus_default_user(ret); | |
3265 | else | |
3266 | return sd_bus_default_system(ret); | |
3267 | } | |
3268 | ||
76b54375 LP |
3269 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3270 | assert_return(b, -EINVAL); | |
3271 | assert_return(tid, -EINVAL); | |
3272 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3273 | ||
3274 | if (b->tid != 0) { | |
3275 | *tid = b->tid; | |
3276 | return 0; | |
3277 | } | |
3278 | ||
3279 | if (b->event) | |
3280 | return sd_event_get_tid(b->event, tid); | |
3281 | ||
3282 | return -ENXIO; | |
3283 | } | |
28383ba1 | 3284 | |
a6278b88 LP |
3285 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3286 | _cleanup_free_ char *e = NULL; | |
3287 | char *ret; | |
3288 | ||
3289 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3290 | assert_return(external_id, -EINVAL); | |
3291 | assert_return(ret_path, -EINVAL); | |
3292 | ||
3293 | e = bus_label_escape(external_id); | |
3294 | if (!e) | |
3295 | return -ENOMEM; | |
3296 | ||
605405c6 | 3297 | ret = strjoin(prefix, "/", e); |
a6278b88 LP |
3298 | if (!ret) |
3299 | return -ENOMEM; | |
3300 | ||
3301 | *ret_path = ret; | |
3302 | return 0; | |
28383ba1 LP |
3303 | } |
3304 | ||
a6278b88 LP |
3305 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3306 | const char *e; | |
3307 | char *ret; | |
3308 | ||
3309 | assert_return(object_path_is_valid(path), -EINVAL); | |
3310 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3311 | assert_return(external_id, -EINVAL); | |
3312 | ||
3313 | e = object_path_startswith(path, prefix); | |
3314 | if (!e) { | |
3315 | *external_id = NULL; | |
3316 | return 0; | |
3317 | } | |
3318 | ||
3319 | ret = bus_label_unescape(e); | |
3320 | if (!ret) | |
3321 | return -ENOMEM; | |
3322 | ||
3323 | *external_id = ret; | |
3324 | return 1; | |
28383ba1 | 3325 | } |
5b12334d | 3326 | |
dfb815c3 DH |
3327 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3328 | _cleanup_strv_free_ char **labels = NULL; | |
3329 | char *path, *path_pos, **label_pos; | |
3330 | const char *sep, *template_pos; | |
3331 | size_t path_length; | |
3332 | va_list list; | |
3333 | int r; | |
3334 | ||
3335 | assert_return(out, -EINVAL); | |
3336 | assert_return(path_template, -EINVAL); | |
3337 | ||
3338 | path_length = strlen(path_template); | |
3339 | ||
19932084 | 3340 | va_start(list, path_template); |
dfb815c3 DH |
3341 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3342 | const char *arg; | |
3343 | char *label; | |
3344 | ||
3345 | arg = va_arg(list, const char *); | |
3346 | if (!arg) { | |
3347 | va_end(list); | |
3348 | return -EINVAL; | |
3349 | } | |
3350 | ||
3351 | label = bus_label_escape(arg); | |
3352 | if (!label) { | |
3353 | va_end(list); | |
3354 | return -ENOMEM; | |
3355 | } | |
3356 | ||
3357 | r = strv_consume(&labels, label); | |
3358 | if (r < 0) { | |
3359 | va_end(list); | |
3360 | return r; | |
3361 | } | |
3362 | ||
3363 | /* add label length, but account for the format character */ | |
3364 | path_length += strlen(label) - 1; | |
3365 | } | |
3366 | va_end(list); | |
3367 | ||
3368 | path = malloc(path_length + 1); | |
3369 | if (!path) | |
3370 | return -ENOMEM; | |
3371 | ||
3372 | path_pos = path; | |
3373 | label_pos = labels; | |
3374 | ||
3375 | for (template_pos = path_template; *template_pos; ) { | |
3376 | sep = strchrnul(template_pos, '%'); | |
3377 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3378 | if (!*sep) | |
3379 | break; | |
3380 | ||
3381 | path_pos = stpcpy(path_pos, *label_pos++); | |
3382 | template_pos = sep + 1; | |
3383 | } | |
3384 | ||
3385 | *path_pos = 0; | |
3386 | *out = path; | |
3387 | return 0; | |
3388 | } | |
3389 | ||
3390 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3391 | _cleanup_strv_free_ char **labels = NULL; | |
3392 | const char *template_pos, *path_pos; | |
3393 | char **label_pos; | |
3394 | va_list list; | |
3395 | int r; | |
3396 | ||
3397 | /* | |
3398 | * This decodes an object-path based on a template argument. The | |
3399 | * template consists of a verbatim path, optionally including special | |
3400 | * directives: | |
3401 | * | |
3402 | * - Each occurrence of '%' in the template matches an arbitrary | |
3403 | * substring of a label in the given path. At most one such | |
3404 | * directive is allowed per label. For each such directive, the | |
3405 | * caller must provide an output parameter (char **) via va_arg. If | |
3406 | * NULL is passed, the given label is verified, but not returned. | |
3407 | * For each matched label, the *decoded* label is stored in the | |
3408 | * passed output argument, and the caller is responsible to free | |
3409 | * it. Note that the output arguments are only modified if the | |
3410 | * actualy path matched the template. Otherwise, they're left | |
3411 | * untouched. | |
3412 | * | |
3413 | * This function returns <0 on error, 0 if the path does not match the | |
3414 | * template, 1 if it matched. | |
3415 | */ | |
3416 | ||
3417 | assert_return(path, -EINVAL); | |
3418 | assert_return(path_template, -EINVAL); | |
3419 | ||
3420 | path_pos = path; | |
3421 | ||
3422 | for (template_pos = path_template; *template_pos; ) { | |
3423 | const char *sep; | |
3424 | size_t length; | |
3425 | char *label; | |
3426 | ||
3427 | /* verify everything until the next '%' matches verbatim */ | |
3428 | sep = strchrnul(template_pos, '%'); | |
3429 | length = sep - template_pos; | |
3430 | if (strncmp(path_pos, template_pos, length)) | |
3431 | return 0; | |
3432 | ||
3433 | path_pos += length; | |
3434 | template_pos += length; | |
3435 | ||
3436 | if (!*template_pos) | |
3437 | break; | |
3438 | ||
3439 | /* We found the next '%' character. Everything up until here | |
3440 | * matched. We now skip ahead to the end of this label and make | |
3441 | * sure it matches the tail of the label in the path. Then we | |
3442 | * decode the string in-between and save it for later use. */ | |
3443 | ||
3444 | ++template_pos; /* skip over '%' */ | |
3445 | ||
3446 | sep = strchrnul(template_pos, '/'); | |
3447 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3448 | ||
3449 | /* verify the suffixes match */ | |
3450 | sep = strchrnul(path_pos, '/'); | |
3451 | if (sep - path_pos < (ssize_t)length || | |
3452 | strncmp(sep - length, template_pos, length)) | |
3453 | return 0; | |
3454 | ||
3455 | template_pos += length; /* skip over matched label */ | |
3456 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3457 | ||
3458 | /* store unescaped label for later use */ | |
3459 | label = bus_label_unescape_n(path_pos, length); | |
3460 | if (!label) | |
3461 | return -ENOMEM; | |
3462 | ||
3463 | r = strv_consume(&labels, label); | |
3464 | if (r < 0) | |
3465 | return r; | |
3466 | ||
3467 | path_pos = sep; /* skip decoded label and suffix */ | |
3468 | } | |
3469 | ||
3470 | /* end of template must match end of path */ | |
3471 | if (*path_pos) | |
3472 | return 0; | |
3473 | ||
3474 | /* copy the labels over to the caller */ | |
19932084 | 3475 | va_start(list, path_template); |
dfb815c3 DH |
3476 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3477 | char **arg; | |
3478 | ||
3479 | arg = va_arg(list, char **); | |
3480 | if (arg) | |
3481 | *arg = *label_pos; | |
3482 | else | |
3483 | free(*label_pos); | |
3484 | } | |
3485 | va_end(list); | |
3486 | ||
3487 | free(labels); | |
3488 | labels = NULL; | |
3489 | return 1; | |
3490 | } | |
3491 | ||
ae095f86 | 3492 | _public_ int sd_bus_try_close(sd_bus *bus) { |
ae095f86 | 3493 | assert_return(bus, -EINVAL); |
ae095f86 | 3494 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 | 3495 | |
a132bef0 | 3496 | return -EOPNOTSUPP; |
ae095f86 | 3497 | } |
5972fe95 | 3498 | |
455971c1 | 3499 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3500 | assert_return(bus, -EINVAL); |
455971c1 | 3501 | assert_return(description, -EINVAL); |
f4b2933e | 3502 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3503 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3504 | ||
455971c1 | 3505 | *description = bus->description; |
5972fe95 LP |
3506 | return 0; |
3507 | } | |
fe3f22d1 DK |
3508 | |
3509 | int bus_get_root_path(sd_bus *bus) { | |
3510 | int r; | |
3511 | ||
3512 | if (bus->cgroup_root) | |
3513 | return 0; | |
3514 | ||
3515 | r = cg_get_root_path(&bus->cgroup_root); | |
3516 | if (r == -ENOENT) { | |
3517 | bus->cgroup_root = strdup("/"); | |
3518 | if (!bus->cgroup_root) | |
3519 | return -ENOMEM; | |
3520 | ||
3521 | r = 0; | |
3522 | } | |
3523 | ||
3524 | return r; | |
3525 | } | |
3acc1daf LP |
3526 | |
3527 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3acc1daf LP |
3528 | assert_return(bus, -EINVAL); |
3529 | assert_return(scope, -EINVAL); | |
3530 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3531 | ||
3acc1daf LP |
3532 | if (bus->is_user) { |
3533 | *scope = "user"; | |
5b820358 | 3534 | return 0; |
3acc1daf LP |
3535 | } |
3536 | ||
3537 | if (bus->is_system) { | |
3538 | *scope = "system"; | |
5b820358 LP |
3539 | return 0; |
3540 | } | |
3541 | ||
3542 | return -ENODATA; | |
3543 | } | |
3544 | ||
3545 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3546 | ||
3547 | assert_return(bus, -EINVAL); | |
3548 | assert_return(address, -EINVAL); | |
3549 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3550 | ||
3551 | if (bus->address) { | |
3552 | *address = bus->address; | |
3553 | return 0; | |
3acc1daf LP |
3554 | } |
3555 | ||
3556 | return -ENODATA; | |
3557 | } | |
224b3787 | 3558 | |
882897af | 3559 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 LP |
3560 | assert_return(bus, -EINVAL); |
3561 | assert_return(mask, -EINVAL); | |
3562 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3563 | ||
3564 | *mask = bus->creds_mask; | |
3565 | return 0; | |
3566 | } | |
3567 | ||
882897af | 3568 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 LP |
3569 | assert_return(bus, -EINVAL); |
3570 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3571 | ||
3572 | return bus->bus_client; | |
3573 | } | |
3574 | ||
882897af | 3575 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 LP |
3576 | assert_return(bus, -EINVAL); |
3577 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3578 | ||
3579 | return bus->is_server; | |
3580 | } | |
3581 | ||
882897af | 3582 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 LP |
3583 | assert_return(bus, -EINVAL); |
3584 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3585 | ||
3586 | return bus->anonymous_auth; | |
3587 | } | |
3588 | ||
882897af | 3589 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 LP |
3590 | assert_return(bus, -EINVAL); |
3591 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3592 | ||
3593 | return bus->trusted; | |
3594 | } | |
3595 | ||
882897af | 3596 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 LP |
3597 | assert_return(bus, -EINVAL); |
3598 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3599 | ||
3600 | return !!(bus->hello_flags & KDBUS_HELLO_MONITOR); | |
3601 | } | |
fa2f8973 LP |
3602 | |
3603 | static void flush_close(sd_bus *bus) { | |
3604 | if (!bus) | |
3605 | return; | |
3606 | ||
3607 | /* Flushes and closes the specified bus. We take a ref before, | |
3608 | * to ensure the flushing does not cause the bus to be | |
3609 | * unreferenced. */ | |
3610 | ||
3611 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
3612 | } | |
3613 | ||
3614 | _public_ void sd_bus_default_flush_close(void) { | |
3615 | flush_close(default_starter_bus); | |
3616 | flush_close(default_user_bus); | |
3617 | flush_close(default_system_bus); | |
3618 | } | |
fbb4603d LP |
3619 | |
3620 | _public_ int sd_bus_set_exit_on_disconnect(sd_bus *bus, int b) { | |
3621 | assert_return(bus, -EINVAL); | |
3622 | ||
3623 | /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already | |
3624 | * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never | |
3625 | * from the client side. */ | |
3626 | bus->exit_on_disconnect = b; | |
3627 | ||
3628 | /* If the exit condition was triggered already, exit immediately. */ | |
3629 | return bus_exit_now(bus); | |
3630 | } | |
3631 | ||
3632 | _public_ int sd_bus_get_exit_on_disconnect(sd_bus *bus) { | |
3633 | assert_return(bus, -EINVAL); | |
3634 | ||
3635 | return bus->exit_on_disconnect; | |
3636 | } |