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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
de1c301e LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <endian.h> | |
de1c301e | 22 | #include <netdb.h> |
0a6f50c0 | 23 | #include <poll.h> |
45fbe937 | 24 | #include <pthread.h> |
392cf1d0 | 25 | #include <signal.h> |
cf0fbc49 TA |
26 | #include <stdlib.h> |
27 | #include <sys/mman.h> | |
392cf1d0 | 28 | #include <sys/wait.h> |
cf0fbc49 | 29 | #include <unistd.h> |
de1c301e | 30 | |
de1c301e | 31 | #include "sd-bus.h" |
07630cea | 32 | |
b5efdb8a | 33 | #include "alloc-util.h" |
07630cea LP |
34 | #include "bus-container.h" |
35 | #include "bus-control.h" | |
de1c301e | 36 | #include "bus-internal.h" |
6629161f | 37 | #include "bus-kernel.h" |
07630cea LP |
38 | #include "bus-label.h" |
39 | #include "bus-message.h" | |
992c052c | 40 | #include "bus-objects.h" |
0461f8cd | 41 | #include "bus-protocol.h" |
19befb2d | 42 | #include "bus-slot.h" |
07630cea LP |
43 | #include "bus-socket.h" |
44 | #include "bus-track.h" | |
45 | #include "bus-type.h" | |
46 | #include "bus-util.h" | |
47 | #include "cgroup-util.h" | |
48 | #include "def.h" | |
3ffd4af2 | 49 | #include "fd-util.h" |
cf0fbc49 | 50 | #include "hexdecoct.h" |
07630cea LP |
51 | #include "hostname-util.h" |
52 | #include "macro.h" | |
53 | #include "missing.h" | |
6bedfcbb | 54 | #include "parse-util.h" |
dccca82b | 55 | #include "process-util.h" |
07630cea LP |
56 | #include "string-util.h" |
57 | #include "strv.h" | |
58 | #include "util.h" | |
de1c301e | 59 | |
b56c4604 LP |
60 | #define log_debug_bus_message(m) \ |
61 | do { \ | |
62 | sd_bus_message *_mm = (m); \ | |
e32fd6b4 | 63 | log_debug("Got message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s", \ |
b56c4604 LP |
64 | bus_message_type_to_string(_mm->header->type), \ |
65 | strna(sd_bus_message_get_sender(_mm)), \ | |
66 | strna(sd_bus_message_get_destination(_mm)), \ | |
67 | strna(sd_bus_message_get_path(_mm)), \ | |
68 | strna(sd_bus_message_get_interface(_mm)), \ | |
69 | strna(sd_bus_message_get_member(_mm)), \ | |
70 | BUS_MESSAGE_COOKIE(_mm), \ | |
71 | _mm->reply_cookie, \ | |
e32fd6b4 | 72 | strna(_mm->root_container.signature), \ |
e28d0865 | 73 | strna(_mm->error.name), \ |
b56c4604 LP |
74 | strna(_mm->error.message)); \ |
75 | } while (false) | |
f9f97ca6 | 76 | |
e3017af9 | 77 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
8a5cd31e LP |
78 | static void bus_detach_io_events(sd_bus *b); |
79 | static void bus_detach_inotify_event(sd_bus *b); | |
e3017af9 | 80 | |
fa2f8973 LP |
81 | static thread_local sd_bus *default_system_bus = NULL; |
82 | static thread_local sd_bus *default_user_bus = NULL; | |
83 | static thread_local sd_bus *default_starter_bus = NULL; | |
84 | ||
45b1f410 NM |
85 | static sd_bus **bus_choose_default(int (**bus_open)(sd_bus **)) { |
86 | const char *e; | |
87 | ||
88 | /* Let's try our best to reuse another cached connection. If | |
89 | * the starter bus type is set, connect via our normal | |
90 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
91 | * we can share the connection with the user/system default | |
92 | * bus. */ | |
93 | ||
94 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
95 | if (e) { | |
96 | if (streq(e, "system")) { | |
97 | if (bus_open) | |
98 | *bus_open = sd_bus_open_system; | |
99 | return &default_system_bus; | |
100 | } else if (STR_IN_SET(e, "user", "session")) { | |
101 | if (bus_open) | |
102 | *bus_open = sd_bus_open_user; | |
103 | return &default_user_bus; | |
104 | } | |
105 | } | |
106 | ||
107 | /* No type is specified, so we have not other option than to | |
108 | * use the starter address if it is set. */ | |
109 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
110 | if (e) { | |
111 | if (bus_open) | |
112 | *bus_open = sd_bus_open; | |
113 | return &default_starter_bus; | |
114 | } | |
115 | ||
116 | /* Finally, if nothing is set use the cached connection for | |
117 | * the right scope */ | |
118 | ||
119 | if (cg_pid_get_owner_uid(0, NULL) >= 0) { | |
120 | if (bus_open) | |
121 | *bus_open = sd_bus_open_user; | |
122 | return &default_user_bus; | |
123 | } else { | |
124 | if (bus_open) | |
125 | *bus_open = sd_bus_open_system; | |
126 | return &default_system_bus; | |
127 | } | |
128 | } | |
129 | ||
130 | sd_bus *bus_resolve(sd_bus *bus) { | |
131 | switch ((uintptr_t) bus) { | |
132 | case (uintptr_t) SD_BUS_DEFAULT: | |
133 | return *(bus_choose_default(NULL)); | |
134 | case (uintptr_t) SD_BUS_DEFAULT_USER: | |
135 | return default_user_bus; | |
136 | case (uintptr_t) SD_BUS_DEFAULT_SYSTEM: | |
137 | return default_system_bus; | |
138 | default: | |
139 | return bus; | |
140 | } | |
141 | } | |
142 | ||
8a5cd31e | 143 | void bus_close_io_fds(sd_bus *b) { |
f54514f3 LP |
144 | assert(b); |
145 | ||
8a5cd31e | 146 | bus_detach_io_events(b); |
1e05d493 | 147 | |
0fd8d506 | 148 | if (b->input_fd != b->output_fd) |
03e334a1 | 149 | safe_close(b->output_fd); |
0fd8d506 | 150 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
151 | } |
152 | ||
8a5cd31e LP |
153 | void bus_close_inotify_fd(sd_bus *b) { |
154 | assert(b); | |
155 | ||
156 | bus_detach_inotify_event(b); | |
157 | ||
158 | b->inotify_fd = safe_close(b->inotify_fd); | |
159 | b->inotify_watches = mfree(b->inotify_watches); | |
160 | b->n_inotify_watches = 0; | |
161 | } | |
162 | ||
0e586eae | 163 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
164 | assert(b); |
165 | ||
f389bf15 LP |
166 | while (b->rqueue_size > 0) |
167 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
168 | ||
253f96e5 | 169 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 170 | b->rqueue_allocated = 0; |
0e586eae | 171 | |
f389bf15 LP |
172 | while (b->wqueue_size > 0) |
173 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 174 | |
253f96e5 | 175 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 176 | b->wqueue_allocated = 0; |
0e586eae LP |
177 | } |
178 | ||
de1c301e | 179 | static void bus_free(sd_bus *b) { |
19befb2d | 180 | sd_bus_slot *s; |
de1c301e LP |
181 | |
182 | assert(b); | |
8f8f05a9 | 183 | assert(!b->track_queue); |
232f3677 | 184 | assert(!b->tracks); |
8f8f05a9 | 185 | |
19befb2d LP |
186 | b->state = BUS_CLOSED; |
187 | ||
40ca29a1 LP |
188 | sd_bus_detach_event(b); |
189 | ||
19befb2d LP |
190 | while ((s = b->slots)) { |
191 | /* At this point only floating slots can still be | |
192 | * around, because the non-floating ones keep a | |
193 | * reference to the bus, and we thus couldn't be | |
194 | * destructing right now... We forcibly disconnect the | |
195 | * slots here, so that they still can be referenced by | |
196 | * apps, but are dead. */ | |
197 | ||
198 | assert(s->floating); | |
199 | bus_slot_disconnect(s); | |
200 | sd_bus_slot_unref(s); | |
201 | } | |
202 | ||
f4d140e9 LP |
203 | if (b->default_bus_ptr) |
204 | *b->default_bus_ptr = NULL; | |
205 | ||
8a5cd31e LP |
206 | bus_close_io_fds(b); |
207 | bus_close_inotify_fd(b); | |
de1c301e | 208 | |
c4e6556c | 209 | free(b->label); |
18ac4643 | 210 | free(b->groups); |
de1c301e | 211 | free(b->rbuffer); |
89ffcd2a | 212 | free(b->unique_name); |
2181a7f5 | 213 | free(b->auth_buffer); |
89ffcd2a | 214 | free(b->address); |
a7893c6b | 215 | free(b->machine); |
751bc6ac | 216 | free(b->cgroup_root); |
455971c1 | 217 | free(b->description); |
48ef41a3 | 218 | free(b->patch_sender); |
89ffcd2a | 219 | |
2fd9ae2e LP |
220 | free(b->exec_path); |
221 | strv_free(b->exec_argv); | |
222 | ||
2c93b4ef LP |
223 | close_many(b->fds, b->n_fds); |
224 | free(b->fds); | |
225 | ||
0e586eae | 226 | bus_reset_queues(b); |
de1c301e | 227 | |
c9fe4af7 | 228 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 229 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 230 | |
75a0da95 | 231 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
232 | bus_match_free(&b->match_callbacks); |
233 | ||
29ddb38f LP |
234 | hashmap_free_free(b->vtable_methods); |
235 | hashmap_free_free(b->vtable_properties); | |
236 | ||
19befb2d | 237 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
238 | hashmap_free(b->nodes); |
239 | ||
a132bef0 | 240 | bus_flush_memfd(b); |
bc7fd8cd | 241 | |
45fbe937 LP |
242 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
243 | ||
de1c301e LP |
244 | free(b); |
245 | } | |
246 | ||
d9f644e2 | 247 | _public_ int sd_bus_new(sd_bus **ret) { |
de1c301e LP |
248 | sd_bus *r; |
249 | ||
d6888822 | 250 | assert_return(ret, -EINVAL); |
021a1e78 | 251 | |
de1c301e LP |
252 | r = new0(sd_bus, 1); |
253 | if (!r) | |
021a1e78 | 254 | return -ENOMEM; |
de1c301e | 255 | |
e4ee6e5c | 256 | r->n_ref = REFCNT_INIT; |
e82c9509 | 257 | r->input_fd = r->output_fd = -1; |
8a5cd31e | 258 | r->inotify_fd = -1; |
de1c301e | 259 | r->message_version = 1; |
3310dfd5 | 260 | r->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
c7db1984 | 261 | r->accept_fd = true; |
df0ff127 | 262 | r->original_pid = getpid_cached(); |
18ac4643 | 263 | r->n_groups = (size_t) -1; |
de1c301e | 264 | |
45fbe937 LP |
265 | assert_se(pthread_mutex_init(&r->memfd_cache_mutex, NULL) == 0); |
266 | ||
de1c301e LP |
267 | /* We guarantee that wqueue always has space for at least one |
268 | * entry */ | |
821e0756 | 269 | if (!GREEDY_REALLOC(r->wqueue, r->wqueue_allocated, 1)) { |
de1c301e | 270 | free(r); |
021a1e78 | 271 | return -ENOMEM; |
de1c301e LP |
272 | } |
273 | ||
021a1e78 LP |
274 | *ret = r; |
275 | return 0; | |
276 | } | |
277 | ||
d9f644e2 | 278 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
279 | char *a; |
280 | ||
d6888822 | 281 | assert_return(bus, -EINVAL); |
45b1f410 | 282 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
283 | assert_return(bus->state == BUS_UNSET, -EPERM); |
284 | assert_return(address, -EINVAL); | |
285 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
286 | |
287 | a = strdup(address); | |
288 | if (!a) | |
289 | return -ENOMEM; | |
290 | ||
cad4fb19 | 291 | free_and_replace(bus->address, a); |
021a1e78 LP |
292 | |
293 | return 0; | |
294 | } | |
295 | ||
d9f644e2 | 296 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 | 297 | assert_return(bus, -EINVAL); |
45b1f410 | 298 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 299 | assert_return(bus->state == BUS_UNSET, -EPERM); |
8ac43fee LP |
300 | assert_return(input_fd >= 0, -EBADF); |
301 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 302 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 303 | |
e82c9509 LP |
304 | bus->input_fd = input_fd; |
305 | bus->output_fd = output_fd; | |
021a1e78 LP |
306 | return 0; |
307 | } | |
308 | ||
d9f644e2 | 309 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
2fd9ae2e LP |
310 | char *p, **a; |
311 | ||
d6888822 | 312 | assert_return(bus, -EINVAL); |
45b1f410 | 313 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
314 | assert_return(bus->state == BUS_UNSET, -EPERM); |
315 | assert_return(path, -EINVAL); | |
316 | assert_return(!strv_isempty(argv), -EINVAL); | |
317 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
318 | |
319 | p = strdup(path); | |
320 | if (!p) | |
321 | return -ENOMEM; | |
322 | ||
323 | a = strv_copy(argv); | |
324 | if (!a) { | |
325 | free(p); | |
326 | return -ENOMEM; | |
327 | } | |
328 | ||
cad4fb19 | 329 | free_and_replace(bus->exec_path, p); |
2fd9ae2e | 330 | |
cad4fb19 | 331 | strv_free(bus->exec_argv); |
2fd9ae2e LP |
332 | bus->exec_argv = a; |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
d9f644e2 | 337 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 | 338 | assert_return(bus, -EINVAL); |
45b1f410 | 339 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 340 | assert_return(bus->state == BUS_UNSET, -EPERM); |
48ef41a3 | 341 | assert_return(!bus->patch_sender, -EPERM); |
d6888822 | 342 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 343 | |
94bbf1ba | 344 | bus->bus_client = !!b; |
021a1e78 LP |
345 | return 0; |
346 | } | |
347 | ||
09365592 LP |
348 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
349 | assert_return(bus, -EINVAL); | |
45b1f410 | 350 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
09365592 LP |
351 | assert_return(bus->state == BUS_UNSET, -EPERM); |
352 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
353 | ||
e5c8029e | 354 | bus->is_monitor = !!b; |
09365592 LP |
355 | return 0; |
356 | } | |
357 | ||
d9f644e2 | 358 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 | 359 | assert_return(bus, -EINVAL); |
45b1f410 | 360 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
361 | assert_return(bus->state == BUS_UNSET, -EPERM); |
362 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 363 | |
e5c8029e | 364 | bus->accept_fd = !!b; |
264ad849 LP |
365 | return 0; |
366 | } | |
367 | ||
4fc31988 | 368 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
16be4368 | 369 | assert_return(bus, -EINVAL); |
45b1f410 | 370 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
b5dae4c7 | 371 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
372 | assert_return(!bus_pid_changed(bus), -ECHILD); |
373 | ||
c7db1984 LP |
374 | /* This is not actually supported by any of our transports these days, but we do honour it for synthetic |
375 | * replies, and maybe one day classic D-Bus learns this too */ | |
e5c8029e | 376 | bus->attach_timestamp = !!b; |
b5dae4c7 | 377 | |
16be4368 KS |
378 | return 0; |
379 | } | |
380 | ||
b5dae4c7 | 381 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
16be4368 | 382 | assert_return(bus, -EINVAL); |
45b1f410 | 383 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
95c4fe82 | 384 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 385 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
386 | assert_return(!bus_pid_changed(bus), -ECHILD); |
387 | ||
5883ff60 | 388 | SET_FLAG(bus->creds_mask, mask, b); |
b5dae4c7 | 389 | |
49b832c5 | 390 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
391 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
392 | ||
b5dae4c7 | 393 | return 0; |
021a1e78 | 394 | } |
de1c301e | 395 | |
d9f644e2 | 396 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 | 397 | assert_return(bus, -EINVAL); |
45b1f410 | 398 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
399 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); |
400 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
401 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
402 | |
403 | bus->is_server = !!b; | |
98178d39 | 404 | bus->server_id = server_id; |
2181a7f5 LP |
405 | return 0; |
406 | } | |
407 | ||
d9f644e2 | 408 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 | 409 | assert_return(bus, -EINVAL); |
45b1f410 | 410 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
411 | assert_return(bus->state == BUS_UNSET, -EPERM); |
412 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
413 | |
414 | bus->anonymous_auth = !!b; | |
415 | return 0; | |
416 | } | |
417 | ||
adacb957 LP |
418 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
419 | assert_return(bus, -EINVAL); | |
45b1f410 | 420 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
adacb957 LP |
421 | assert_return(bus->state == BUS_UNSET, -EPERM); |
422 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
423 | ||
424 | bus->trusted = !!b; | |
425 | return 0; | |
426 | } | |
427 | ||
455971c1 | 428 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 429 | assert_return(bus, -EINVAL); |
45b1f410 | 430 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
5972fe95 LP |
431 | assert_return(bus->state == BUS_UNSET, -EPERM); |
432 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
433 | ||
d1b91c99 | 434 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
435 | } |
436 | ||
c0765ddb LP |
437 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
438 | assert_return(bus, -EINVAL); | |
45b1f410 | 439 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
c0765ddb LP |
440 | assert_return(!bus_pid_changed(bus), -ECHILD); |
441 | ||
442 | bus->allow_interactive_authorization = !!b; | |
443 | return 0; | |
444 | } | |
445 | ||
446 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
447 | assert_return(bus, -EINVAL); | |
45b1f410 | 448 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
c0765ddb LP |
449 | assert_return(!bus_pid_changed(bus), -ECHILD); |
450 | ||
451 | return bus->allow_interactive_authorization; | |
452 | } | |
453 | ||
8a5cd31e LP |
454 | _public_ int sd_bus_set_watch_bind(sd_bus *bus, int b) { |
455 | assert_return(bus, -EINVAL); | |
45b1f410 | 456 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
8a5cd31e LP |
457 | assert_return(bus->state == BUS_UNSET, -EPERM); |
458 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
459 | ||
e5c8029e | 460 | bus->watch_bind = !!b; |
8a5cd31e LP |
461 | return 0; |
462 | } | |
463 | ||
464 | _public_ int sd_bus_get_watch_bind(sd_bus *bus) { | |
465 | assert_return(bus, -EINVAL); | |
45b1f410 | 466 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
8a5cd31e LP |
467 | assert_return(!bus_pid_changed(bus), -ECHILD); |
468 | ||
469 | return bus->watch_bind; | |
470 | } | |
471 | ||
b38cc8d5 LP |
472 | _public_ int sd_bus_set_connected_signal(sd_bus *bus, int b) { |
473 | assert_return(bus, -EINVAL); | |
45b1f410 | 474 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
b38cc8d5 LP |
475 | assert_return(bus->state == BUS_UNSET, -EPERM); |
476 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
477 | ||
e5c8029e | 478 | bus->connected_signal = !!b; |
b38cc8d5 LP |
479 | return 0; |
480 | } | |
481 | ||
482 | _public_ int sd_bus_get_connected_signal(sd_bus *bus) { | |
483 | assert_return(bus, -EINVAL); | |
45b1f410 | 484 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
b38cc8d5 LP |
485 | assert_return(!bus_pid_changed(bus), -ECHILD); |
486 | ||
487 | return bus->connected_signal; | |
488 | } | |
489 | ||
490 | static int synthesize_connected_signal(sd_bus *bus) { | |
491 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
492 | int r; | |
493 | ||
494 | assert(bus); | |
495 | ||
496 | /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called | |
497 | * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the | |
498 | * Hello() reply. Or in other words, whenver we enter BUS_RUNNING state. | |
499 | * | |
500 | * This is useful so that clients can start doing stuff whenver the connection is fully established in a way | |
501 | * that works independently from whether we connected to a full bus or just a direct connection. */ | |
502 | ||
503 | if (!bus->connected_signal) | |
504 | return 0; | |
505 | ||
506 | r = sd_bus_message_new_signal( | |
507 | bus, | |
508 | &m, | |
509 | "/org/freedesktop/DBus/Local", | |
510 | "org.freedesktop.DBus.Local", | |
511 | "Connected"); | |
512 | if (r < 0) | |
513 | return r; | |
514 | ||
515 | bus_message_set_sender_local(bus, m); | |
516 | ||
517 | r = bus_seal_synthetic_message(bus, m); | |
518 | if (r < 0) | |
519 | return r; | |
520 | ||
521 | r = bus_rqueue_make_room(bus); | |
522 | if (r < 0) | |
523 | return r; | |
524 | ||
525 | /* Insert at the very front */ | |
526 | memmove(bus->rqueue + 1, bus->rqueue, sizeof(sd_bus_message*) * bus->rqueue_size); | |
527 | bus->rqueue[0] = m; | |
528 | m = NULL; | |
529 | bus->rqueue_size++; | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
3e0e196e LP |
534 | void bus_set_state(sd_bus *bus, enum bus_state state) { |
535 | ||
536 | static const char * const table[_BUS_STATE_MAX] = { | |
537 | [BUS_UNSET] = "UNSET", | |
538 | [BUS_WATCH_BIND] = "WATCH_BIND", | |
539 | [BUS_OPENING] = "OPENING", | |
540 | [BUS_AUTHENTICATING] = "AUTHENTICATING", | |
541 | [BUS_HELLO] = "HELLO", | |
542 | [BUS_RUNNING] = "RUNNING", | |
543 | [BUS_CLOSING] = "CLOSING", | |
544 | [BUS_CLOSED] = "CLOSED", | |
545 | }; | |
546 | ||
547 | assert(bus); | |
548 | assert(state < _BUS_STATE_MAX); | |
549 | ||
550 | if (state == bus->state) | |
551 | return; | |
552 | ||
553 | log_debug("Bus %s: changing state %s → %s", strna(bus->description), table[bus->state], table[state]); | |
554 | bus->state = state; | |
555 | } | |
556 | ||
19070062 | 557 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 558 | const char *s; |
b4ca3f45 | 559 | char *t; |
19070062 | 560 | sd_bus *bus; |
de1c301e LP |
561 | int r; |
562 | ||
19070062 LP |
563 | assert(reply); |
564 | bus = reply->bus; | |
de1c301e | 565 | assert(bus); |
945c2931 | 566 | assert(IN_SET(bus->state, BUS_HELLO, BUS_CLOSING)); |
de1c301e | 567 | |
40ca29a1 | 568 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
569 | if (r > 0) |
570 | return -r; | |
eb01ba5d | 571 | |
de1c301e LP |
572 | r = sd_bus_message_read(reply, "s", &s); |
573 | if (r < 0) | |
574 | return r; | |
575 | ||
dafb7591 LP |
576 | if (!service_name_is_valid(s) || s[0] != ':') |
577 | return -EBADMSG; | |
578 | ||
b4ca3f45 YW |
579 | t = strdup(s); |
580 | if (!t) | |
de1c301e LP |
581 | return -ENOMEM; |
582 | ||
b4ca3f45 YW |
583 | free_and_replace(bus->unique_name, t); |
584 | ||
b38cc8d5 | 585 | if (bus->state == BUS_HELLO) { |
3e0e196e | 586 | bus_set_state(bus, BUS_RUNNING); |
dafb7591 | 587 | |
b38cc8d5 LP |
588 | r = synthesize_connected_signal(bus); |
589 | if (r < 0) | |
590 | return r; | |
591 | } | |
592 | ||
de1c301e LP |
593 | return 1; |
594 | } | |
595 | ||
596 | static int bus_send_hello(sd_bus *bus) { | |
4afd3348 | 597 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
de1c301e LP |
598 | int r; |
599 | ||
600 | assert(bus); | |
601 | ||
a132bef0 | 602 | if (!bus->bus_client) |
021a1e78 LP |
603 | return 0; |
604 | ||
de1c301e LP |
605 | r = sd_bus_message_new_method_call( |
606 | bus, | |
151b9b96 | 607 | &m, |
de1c301e | 608 | "org.freedesktop.DBus", |
a7639e37 | 609 | "/org/freedesktop/DBus", |
de1c301e | 610 | "org.freedesktop.DBus", |
151b9b96 | 611 | "Hello"); |
de1c301e LP |
612 | if (r < 0) |
613 | return r; | |
614 | ||
19befb2d | 615 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
616 | } |
617 | ||
a7e3212d | 618 | int bus_start_running(sd_bus *bus) { |
ac8029fc LP |
619 | struct reply_callback *c; |
620 | Iterator i; | |
621 | usec_t n; | |
b38cc8d5 | 622 | int r; |
ac8029fc | 623 | |
de1c301e | 624 | assert(bus); |
ac8029fc LP |
625 | assert(bus->state < BUS_HELLO); |
626 | ||
627 | /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert | |
628 | * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since | |
629 | * adding a fixed value to all entries should not alter the internal order. */ | |
630 | ||
631 | n = now(CLOCK_MONOTONIC); | |
632 | ORDERED_HASHMAP_FOREACH(c, bus->reply_callbacks, i) { | |
633 | if (c->timeout_usec == 0) | |
634 | continue; | |
635 | ||
636 | c->timeout_usec = usec_add(n, c->timeout_usec); | |
637 | } | |
de1c301e | 638 | |
a132bef0 | 639 | if (bus->bus_client) { |
3e0e196e | 640 | bus_set_state(bus, BUS_HELLO); |
e3017af9 | 641 | return 1; |
de1c301e LP |
642 | } |
643 | ||
3e0e196e | 644 | bus_set_state(bus, BUS_RUNNING); |
b38cc8d5 LP |
645 | |
646 | r = synthesize_connected_signal(bus); | |
647 | if (r < 0) | |
648 | return r; | |
649 | ||
e3017af9 | 650 | return 1; |
de1c301e LP |
651 | } |
652 | ||
653 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 654 | size_t l, n = 0, allocated = 0; |
cad4fb19 | 655 | _cleanup_free_ char *r = NULL; |
de1c301e | 656 | const char *a; |
de1c301e LP |
657 | |
658 | assert(p); | |
659 | assert(*p); | |
de1c301e LP |
660 | assert(value); |
661 | ||
2fd9ae2e LP |
662 | if (key) { |
663 | l = strlen(key); | |
664 | if (strncmp(*p, key, l) != 0) | |
665 | return 0; | |
de1c301e | 666 | |
2fd9ae2e LP |
667 | if ((*p)[l] != '=') |
668 | return 0; | |
de1c301e | 669 | |
2fd9ae2e LP |
670 | if (*value) |
671 | return -EINVAL; | |
de1c301e | 672 | |
2fd9ae2e LP |
673 | a = *p + l + 1; |
674 | } else | |
675 | a = *p; | |
676 | ||
945c2931 | 677 | while (!IN_SET(*a, ';', ',', 0)) { |
821e0756 | 678 | char c; |
de1c301e LP |
679 | |
680 | if (*a == '%') { | |
681 | int x, y; | |
682 | ||
683 | x = unhexchar(a[1]); | |
cad4fb19 | 684 | if (x < 0) |
de1c301e | 685 | return x; |
de1c301e LP |
686 | |
687 | y = unhexchar(a[2]); | |
cad4fb19 | 688 | if (y < 0) |
de1c301e | 689 | return y; |
de1c301e | 690 | |
de1c301e | 691 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
692 | a += 3; |
693 | } else { | |
de1c301e | 694 | c = *a; |
89ffcd2a LP |
695 | a++; |
696 | } | |
de1c301e | 697 | |
821e0756 | 698 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 699 | return -ENOMEM; |
de1c301e | 700 | |
de1c301e LP |
701 | r[n++] = c; |
702 | } | |
703 | ||
89ffcd2a LP |
704 | if (!r) { |
705 | r = strdup(""); | |
706 | if (!r) | |
707 | return -ENOMEM; | |
708 | } else | |
709 | r[n] = 0; | |
710 | ||
711 | if (*a == ',') | |
712 | a++; | |
713 | ||
de1c301e | 714 | *p = a; |
2fd9ae2e | 715 | |
cad4fb19 | 716 | free_and_replace(*value, r); |
2fd9ae2e | 717 | |
de1c301e LP |
718 | return 1; |
719 | } | |
720 | ||
721 | static void skip_address_key(const char **p) { | |
722 | assert(p); | |
723 | assert(*p); | |
724 | ||
89ffcd2a LP |
725 | *p += strcspn(*p, ","); |
726 | ||
727 | if (**p == ',') | |
313cefa1 | 728 | (*p)++; |
de1c301e LP |
729 | } |
730 | ||
2fd9ae2e LP |
731 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
732 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
733 | size_t l; | |
de1c301e LP |
734 | int r; |
735 | ||
736 | assert(b); | |
2fd9ae2e LP |
737 | assert(p); |
738 | assert(*p); | |
739 | assert(guid); | |
de1c301e | 740 | |
945c2931 | 741 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
742 | r = parse_address_key(p, "guid", guid); |
743 | if (r < 0) | |
744 | return r; | |
745 | else if (r > 0) | |
746 | continue; | |
de1c301e | 747 | |
2fd9ae2e LP |
748 | r = parse_address_key(p, "path", &path); |
749 | if (r < 0) | |
750 | return r; | |
751 | else if (r > 0) | |
752 | continue; | |
de1c301e | 753 | |
2fd9ae2e LP |
754 | r = parse_address_key(p, "abstract", &abstract); |
755 | if (r < 0) | |
756 | return r; | |
757 | else if (r > 0) | |
758 | continue; | |
de1c301e | 759 | |
2fd9ae2e LP |
760 | skip_address_key(p); |
761 | } | |
de1c301e | 762 | |
2fd9ae2e LP |
763 | if (!path && !abstract) |
764 | return -EINVAL; | |
de1c301e | 765 | |
2fd9ae2e LP |
766 | if (path && abstract) |
767 | return -EINVAL; | |
768 | ||
769 | if (path) { | |
770 | l = strlen(path); | |
771 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
772 | return -E2BIG; | |
de1c301e | 773 | |
2fd9ae2e LP |
774 | b->sockaddr.un.sun_family = AF_UNIX; |
775 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
776 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
777 | } else if (abstract) { | |
778 | l = strlen(abstract); | |
779 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
780 | return -E2BIG; | |
781 | ||
782 | b->sockaddr.un.sun_family = AF_UNIX; | |
783 | b->sockaddr.un.sun_path[0] = 0; | |
784 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
785 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
786 | } | |
787 | ||
694859b5 LP |
788 | b->is_local = true; |
789 | ||
2fd9ae2e LP |
790 | return 0; |
791 | } | |
792 | ||
793 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
794 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 795 | int r; |
b92bea5d ZJS |
796 | struct addrinfo *result, hints = { |
797 | .ai_socktype = SOCK_STREAM, | |
798 | .ai_flags = AI_ADDRCONFIG, | |
799 | }; | |
2fd9ae2e LP |
800 | |
801 | assert(b); | |
802 | assert(p); | |
803 | assert(*p); | |
804 | assert(guid); | |
805 | ||
945c2931 | 806 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
807 | r = parse_address_key(p, "guid", guid); |
808 | if (r < 0) | |
809 | return r; | |
810 | else if (r > 0) | |
811 | continue; | |
812 | ||
813 | r = parse_address_key(p, "host", &host); | |
814 | if (r < 0) | |
815 | return r; | |
816 | else if (r > 0) | |
817 | continue; | |
818 | ||
819 | r = parse_address_key(p, "port", &port); | |
820 | if (r < 0) | |
821 | return r; | |
822 | else if (r > 0) | |
823 | continue; | |
824 | ||
825 | r = parse_address_key(p, "family", &family); | |
826 | if (r < 0) | |
827 | return r; | |
828 | else if (r > 0) | |
829 | continue; | |
830 | ||
831 | skip_address_key(p); | |
832 | } | |
833 | ||
834 | if (!host || !port) | |
835 | return -EINVAL; | |
836 | ||
2fd9ae2e LP |
837 | if (family) { |
838 | if (streq(family, "ipv4")) | |
839 | hints.ai_family = AF_INET; | |
840 | else if (streq(family, "ipv6")) | |
841 | hints.ai_family = AF_INET6; | |
842 | else | |
843 | return -EINVAL; | |
844 | } | |
845 | ||
846 | r = getaddrinfo(host, port, &hints, &result); | |
847 | if (r == EAI_SYSTEM) | |
848 | return -errno; | |
849 | else if (r != 0) | |
850 | return -EADDRNOTAVAIL; | |
851 | ||
852 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
853 | b->sockaddr_size = result->ai_addrlen; | |
854 | ||
855 | freeaddrinfo(result); | |
856 | ||
694859b5 LP |
857 | b->is_local = false; |
858 | ||
2fd9ae2e LP |
859 | return 0; |
860 | } | |
861 | ||
862 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
863 | char *path = NULL; | |
864 | unsigned n_argv = 0, j; | |
865 | char **argv = NULL; | |
821e0756 | 866 | size_t allocated = 0; |
2fd9ae2e LP |
867 | int r; |
868 | ||
869 | assert(b); | |
870 | assert(p); | |
871 | assert(*p); | |
872 | assert(guid); | |
873 | ||
945c2931 | 874 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
875 | r = parse_address_key(p, "guid", guid); |
876 | if (r < 0) | |
877 | goto fail; | |
878 | else if (r > 0) | |
879 | continue; | |
880 | ||
881 | r = parse_address_key(p, "path", &path); | |
882 | if (r < 0) | |
883 | goto fail; | |
884 | else if (r > 0) | |
885 | continue; | |
886 | ||
887 | if (startswith(*p, "argv")) { | |
888 | unsigned ul; | |
889 | ||
890 | errno = 0; | |
891 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 892 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
893 | r = -EINVAL; |
894 | goto fail; | |
895 | } | |
896 | ||
313cefa1 | 897 | (*p)++; |
2fd9ae2e LP |
898 | |
899 | if (ul >= n_argv) { | |
821e0756 | 900 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
901 | r = -ENOMEM; |
902 | goto fail; | |
903 | } | |
904 | ||
2fd9ae2e LP |
905 | n_argv = ul + 1; |
906 | } | |
907 | ||
908 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 909 | if (r < 0) |
2fd9ae2e | 910 | goto fail; |
de1c301e | 911 | |
2fd9ae2e | 912 | continue; |
de1c301e LP |
913 | } |
914 | ||
2fd9ae2e LP |
915 | skip_address_key(p); |
916 | } | |
de1c301e | 917 | |
5a0f6033 LP |
918 | if (!path) { |
919 | r = -EINVAL; | |
2fd9ae2e | 920 | goto fail; |
5a0f6033 | 921 | } |
de1c301e | 922 | |
2fd9ae2e LP |
923 | /* Make sure there are no holes in the array, with the |
924 | * exception of argv[0] */ | |
925 | for (j = 1; j < n_argv; j++) | |
926 | if (!argv[j]) { | |
927 | r = -EINVAL; | |
928 | goto fail; | |
929 | } | |
930 | ||
931 | if (argv && argv[0] == NULL) { | |
932 | argv[0] = strdup(path); | |
933 | if (!argv[0]) { | |
934 | r = -ENOMEM; | |
935 | goto fail; | |
936 | } | |
937 | } | |
de1c301e | 938 | |
2fd9ae2e LP |
939 | b->exec_path = path; |
940 | b->exec_argv = argv; | |
694859b5 LP |
941 | |
942 | b->is_local = false; | |
943 | ||
2fd9ae2e | 944 | return 0; |
de1c301e | 945 | |
2fd9ae2e LP |
946 | fail: |
947 | for (j = 0; j < n_argv; j++) | |
948 | free(argv[j]); | |
949 | ||
950 | free(argv); | |
951 | free(path); | |
952 | return r; | |
953 | } | |
954 | ||
bc9fd78c | 955 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 956 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
957 | int r; |
958 | ||
959 | assert(b); | |
960 | assert(p); | |
961 | assert(*p); | |
962 | assert(guid); | |
963 | ||
945c2931 | 964 | while (!IN_SET(**p, 0, ';')) { |
a7893c6b LP |
965 | r = parse_address_key(p, "guid", guid); |
966 | if (r < 0) | |
967 | return r; | |
968 | else if (r > 0) | |
969 | continue; | |
970 | ||
971 | r = parse_address_key(p, "machine", &machine); | |
972 | if (r < 0) | |
973 | return r; | |
974 | else if (r > 0) | |
975 | continue; | |
976 | ||
ee502e0c LP |
977 | r = parse_address_key(p, "pid", &pid); |
978 | if (r < 0) | |
979 | return r; | |
980 | else if (r > 0) | |
981 | continue; | |
982 | ||
a7893c6b LP |
983 | skip_address_key(p); |
984 | } | |
985 | ||
ee502e0c | 986 | if (!machine == !pid) |
a7893c6b LP |
987 | return -EINVAL; |
988 | ||
ee502e0c LP |
989 | if (machine) { |
990 | if (!machine_name_is_valid(machine)) | |
991 | return -EINVAL; | |
b6741478 | 992 | |
f9ecfd3b | 993 | free_and_replace(b->machine, machine); |
ee502e0c | 994 | } else { |
a1e58e8e | 995 | b->machine = mfree(b->machine); |
ee502e0c LP |
996 | } |
997 | ||
998 | if (pid) { | |
999 | r = parse_pid(pid, &b->nspid); | |
1000 | if (r < 0) | |
1001 | return r; | |
1002 | } else | |
1003 | b->nspid = 0; | |
a7893c6b LP |
1004 | |
1005 | b->sockaddr.un.sun_family = AF_UNIX; | |
15ca0a42 | 1006 | /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */ |
df1e0204 | 1007 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
fc2fffe7 | 1008 | b->sockaddr_size = SOCKADDR_UN_LEN(b->sockaddr.un); |
694859b5 | 1009 | b->is_local = false; |
a7893c6b LP |
1010 | |
1011 | return 0; | |
1012 | } | |
1013 | ||
2fd9ae2e LP |
1014 | static void bus_reset_parsed_address(sd_bus *b) { |
1015 | assert(b); | |
1016 | ||
1017 | zero(b->sockaddr); | |
1018 | b->sockaddr_size = 0; | |
ba243e51 NK |
1019 | b->exec_argv = strv_free(b->exec_argv); |
1020 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 1021 | b->server_id = SD_ID128_NULL; |
ba243e51 | 1022 | b->machine = mfree(b->machine); |
ee502e0c | 1023 | b->nspid = 0; |
2fd9ae2e LP |
1024 | } |
1025 | ||
1026 | static int bus_parse_next_address(sd_bus *b) { | |
1027 | _cleanup_free_ char *guid = NULL; | |
1028 | const char *a; | |
1029 | int r; | |
1030 | ||
1031 | assert(b); | |
1032 | ||
1033 | if (!b->address) | |
1034 | return 0; | |
1035 | if (b->address[b->address_index] == 0) | |
1036 | return 0; | |
1037 | ||
1038 | bus_reset_parsed_address(b); | |
1039 | ||
1040 | a = b->address + b->address_index; | |
de1c301e | 1041 | |
2fd9ae2e | 1042 | while (*a != 0) { |
de1c301e | 1043 | |
2fd9ae2e LP |
1044 | if (*a == ';') { |
1045 | a++; | |
1046 | continue; | |
de1c301e LP |
1047 | } |
1048 | ||
2fd9ae2e LP |
1049 | if (startswith(a, "unix:")) { |
1050 | a += 5; | |
de1c301e | 1051 | |
2fd9ae2e | 1052 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
1053 | if (r < 0) |
1054 | return r; | |
2fd9ae2e | 1055 | break; |
de1c301e | 1056 | |
2fd9ae2e | 1057 | } else if (startswith(a, "tcp:")) { |
de1c301e | 1058 | |
2fd9ae2e LP |
1059 | a += 4; |
1060 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
1061 | if (r < 0) |
1062 | return r; | |
de1c301e | 1063 | |
2fd9ae2e LP |
1064 | break; |
1065 | ||
1066 | } else if (startswith(a, "unixexec:")) { | |
1067 | ||
1068 | a += 9; | |
1069 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
1070 | if (r < 0) |
1071 | return r; | |
de1c301e | 1072 | |
2fd9ae2e | 1073 | break; |
de1c301e | 1074 | |
de33fc62 | 1075 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 1076 | |
146d4773 | 1077 | a += 15; |
bc9fd78c LP |
1078 | r = parse_container_unix_address(b, &a, &guid); |
1079 | if (r < 0) | |
1080 | return r; | |
1081 | ||
6629161f | 1082 | break; |
de1c301e LP |
1083 | } |
1084 | ||
2fd9ae2e LP |
1085 | a = strchr(a, ';'); |
1086 | if (!a) | |
1087 | return 0; | |
de1c301e LP |
1088 | } |
1089 | ||
1090 | if (guid) { | |
98178d39 | 1091 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
1092 | if (r < 0) |
1093 | return r; | |
1094 | } | |
1095 | ||
2fd9ae2e | 1096 | b->address_index = a - b->address; |
de1c301e LP |
1097 | return 1; |
1098 | } | |
1099 | ||
392cf1d0 SL |
1100 | static void bus_kill_exec(sd_bus *bus) { |
1101 | if (pid_is_valid(bus->busexec_pid) > 0) { | |
1102 | sigterm_wait(bus->busexec_pid); | |
1103 | bus->busexec_pid = 0; | |
1104 | } | |
1105 | } | |
1106 | ||
a7e3212d | 1107 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
1108 | int r; |
1109 | ||
1110 | assert(b); | |
1111 | ||
1112 | for (;;) { | |
8a5cd31e LP |
1113 | bus_close_io_fds(b); |
1114 | bus_close_inotify_fd(b); | |
a7e3212d | 1115 | |
392cf1d0 SL |
1116 | bus_kill_exec(b); |
1117 | ||
a132bef0 ZJS |
1118 | /* If you provide multiple different bus-addresses, we |
1119 | * try all of them in order and use the first one that | |
1120 | * succeeds. */ | |
15442912 | 1121 | |
1e05d493 | 1122 | if (b->exec_path) |
a7893c6b | 1123 | r = bus_socket_exec(b); |
a132bef0 ZJS |
1124 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
1125 | r = bus_container_connect_socket(b); | |
a132bef0 ZJS |
1126 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
1127 | r = bus_socket_connect(b); | |
a132bef0 ZJS |
1128 | else |
1129 | goto next; | |
1130 | ||
1131 | if (r >= 0) { | |
8a5cd31e LP |
1132 | int q; |
1133 | ||
1134 | q = bus_attach_io_events(b); | |
1135 | if (q < 0) | |
1136 | return q; | |
1137 | ||
1138 | q = bus_attach_inotify_event(b); | |
1139 | if (q < 0) | |
1140 | return q; | |
1141 | ||
1142 | return r; | |
2fd9ae2e LP |
1143 | } |
1144 | ||
a132bef0 ZJS |
1145 | b->last_connect_error = -r; |
1146 | ||
1147 | next: | |
2fd9ae2e LP |
1148 | r = bus_parse_next_address(b); |
1149 | if (r < 0) | |
1150 | return r; | |
1151 | if (r == 0) | |
a132bef0 | 1152 | return b->last_connect_error > 0 ? -b->last_connect_error : -ECONNREFUSED; |
de1c301e LP |
1153 | } |
1154 | } | |
1155 | ||
a7e3212d LP |
1156 | int bus_next_address(sd_bus *b) { |
1157 | assert(b); | |
1158 | ||
1159 | bus_reset_parsed_address(b); | |
1160 | return bus_start_address(b); | |
1161 | } | |
1162 | ||
021a1e78 | 1163 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1164 | struct stat st; |
021a1e78 LP |
1165 | int r; |
1166 | ||
1167 | assert(b); | |
e82c9509 LP |
1168 | assert(b->input_fd >= 0); |
1169 | assert(b->output_fd >= 0); | |
021a1e78 | 1170 | |
e82c9509 | 1171 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1172 | if (r < 0) |
1173 | return r; | |
1174 | ||
e82c9509 | 1175 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1176 | if (r < 0) |
1177 | return r; | |
1178 | ||
e82c9509 LP |
1179 | if (b->input_fd != b->output_fd) { |
1180 | r = fd_nonblock(b->output_fd, true); | |
1181 | if (r < 0) | |
1182 | return r; | |
1183 | ||
1184 | r = fd_cloexec(b->output_fd, true); | |
1185 | if (r < 0) | |
1186 | return r; | |
1187 | } | |
1188 | ||
6629161f LP |
1189 | if (fstat(b->input_fd, &st) < 0) |
1190 | return -errno; | |
1191 | ||
a132bef0 | 1192 | return bus_socket_take_fd(b); |
021a1e78 LP |
1193 | } |
1194 | ||
d9f644e2 | 1195 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1196 | int r; |
1197 | ||
d6888822 | 1198 | assert_return(bus, -EINVAL); |
45b1f410 | 1199 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
1200 | assert_return(bus->state == BUS_UNSET, -EPERM); |
1201 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 1202 | |
3e0e196e | 1203 | bus_set_state(bus, BUS_OPENING); |
021a1e78 | 1204 | |
2181a7f5 LP |
1205 | if (bus->is_server && bus->bus_client) |
1206 | return -EINVAL; | |
1207 | ||
e82c9509 | 1208 | if (bus->input_fd >= 0) |
021a1e78 | 1209 | r = bus_start_fd(bus); |
a132bef0 | 1210 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->machine) |
a7e3212d | 1211 | r = bus_start_address(bus); |
021a1e78 LP |
1212 | else |
1213 | return -EINVAL; | |
1214 | ||
db9bb83f LP |
1215 | if (r < 0) { |
1216 | sd_bus_close(bus); | |
021a1e78 | 1217 | return r; |
db9bb83f | 1218 | } |
021a1e78 LP |
1219 | |
1220 | return bus_send_hello(bus); | |
1221 | } | |
1222 | ||
af08d2f9 LP |
1223 | _public_ int sd_bus_open(sd_bus **ret) { |
1224 | const char *e; | |
1225 | sd_bus *b; | |
1226 | int r; | |
1227 | ||
1228 | assert_return(ret, -EINVAL); | |
1229 | ||
1230 | /* Let's connect to the starter bus if it is set, and | |
1231 | * otherwise to the bus that is appropropriate for the scope | |
1232 | * we are running in */ | |
1233 | ||
1234 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1235 | if (e) { | |
1236 | if (streq(e, "system")) | |
1237 | return sd_bus_open_system(ret); | |
09365592 | 1238 | else if (STR_IN_SET(e, "session", "user")) |
af08d2f9 LP |
1239 | return sd_bus_open_user(ret); |
1240 | } | |
1241 | ||
1242 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1243 | if (!e) { | |
1244 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
1245 | return sd_bus_open_user(ret); | |
1246 | else | |
1247 | return sd_bus_open_system(ret); | |
1248 | } | |
1249 | ||
1250 | r = sd_bus_new(&b); | |
1251 | if (r < 0) | |
1252 | return r; | |
1253 | ||
1254 | r = sd_bus_set_address(b, e); | |
1255 | if (r < 0) | |
1256 | goto fail; | |
1257 | ||
1258 | b->bus_client = true; | |
1259 | ||
1260 | /* We don't know whether the bus is trusted or not, so better | |
1261 | * be safe, and authenticate everything */ | |
1262 | b->trusted = false; | |
694859b5 | 1263 | b->is_local = false; |
cf226cfc | 1264 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
af08d2f9 LP |
1265 | |
1266 | r = sd_bus_start(b); | |
1267 | if (r < 0) | |
1268 | goto fail; | |
1269 | ||
1270 | *ret = b; | |
1271 | return 0; | |
1272 | ||
1273 | fail: | |
1274 | bus_free(b); | |
1275 | return r; | |
1276 | } | |
1277 | ||
09365592 | 1278 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1279 | const char *e; |
09365592 LP |
1280 | assert(b); |
1281 | ||
1282 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1283 | if (e) | |
1284 | return sd_bus_set_address(b, e); | |
1285 | ||
057171ef | 1286 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1287 | } |
1288 | ||
1289 | _public_ int sd_bus_open_system(sd_bus **ret) { | |
de1c301e LP |
1290 | sd_bus *b; |
1291 | int r; | |
1292 | ||
d6888822 | 1293 | assert_return(ret, -EINVAL); |
de1c301e | 1294 | |
021a1e78 LP |
1295 | r = sd_bus_new(&b); |
1296 | if (r < 0) | |
1297 | return r; | |
1298 | ||
09365592 | 1299 | r = bus_set_address_system(b); |
e3dd987c LP |
1300 | if (r < 0) |
1301 | goto fail; | |
de1c301e | 1302 | |
94bbf1ba | 1303 | b->bus_client = true; |
5972fe95 | 1304 | b->is_system = true; |
021a1e78 | 1305 | |
adacb957 LP |
1306 | /* Let's do per-method access control on the system bus. We |
1307 | * need the caller's UID and capability set for that. */ | |
1308 | b->trusted = false; | |
cf226cfc | 1309 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
694859b5 | 1310 | b->is_local = true; |
adacb957 | 1311 | |
021a1e78 LP |
1312 | r = sd_bus_start(b); |
1313 | if (r < 0) | |
1314 | goto fail; | |
de1c301e LP |
1315 | |
1316 | *ret = b; | |
1317 | return 0; | |
021a1e78 LP |
1318 | |
1319 | fail: | |
1320 | bus_free(b); | |
1321 | return r; | |
de1c301e LP |
1322 | } |
1323 | ||
09365592 | 1324 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1325 | const char *e; |
a132bef0 | 1326 | _cleanup_free_ char *ee = NULL, *s = NULL; |
de1c301e | 1327 | |
09365592 | 1328 | assert(b); |
021a1e78 | 1329 | |
6c03089c | 1330 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1331 | if (e) |
1332 | return sd_bus_set_address(b, e); | |
1333 | ||
1334 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
a132bef0 ZJS |
1335 | if (!e) |
1336 | return -ENOENT; | |
e3dd987c | 1337 | |
a132bef0 ZJS |
1338 | ee = bus_address_escape(e); |
1339 | if (!ee) | |
1340 | return -ENOMEM; | |
de1c301e | 1341 | |
15ca0a42 | 1342 | if (asprintf(&s, DEFAULT_USER_BUS_ADDRESS_FMT, ee) < 0) |
09365592 LP |
1343 | return -ENOMEM; |
1344 | ||
a132bef0 ZJS |
1345 | b->address = s; |
1346 | s = NULL; | |
1347 | ||
09365592 LP |
1348 | return 0; |
1349 | } | |
1350 | ||
1351 | _public_ int sd_bus_open_user(sd_bus **ret) { | |
1352 | sd_bus *b; | |
1353 | int r; | |
1354 | ||
1355 | assert_return(ret, -EINVAL); | |
1356 | ||
1357 | r = sd_bus_new(&b); | |
1358 | if (r < 0) | |
1359 | return r; | |
1360 | ||
1361 | r = bus_set_address_user(b); | |
1362 | if (r < 0) | |
4f6631c8 | 1363 | goto fail; |
09365592 | 1364 | |
94bbf1ba | 1365 | b->bus_client = true; |
5972fe95 | 1366 | b->is_user = true; |
de1c301e | 1367 | |
adacb957 LP |
1368 | /* We don't do any per-method access control on the user |
1369 | * bus. */ | |
1370 | b->trusted = true; | |
694859b5 | 1371 | b->is_local = true; |
adacb957 | 1372 | |
021a1e78 | 1373 | r = sd_bus_start(b); |
2571ead1 LP |
1374 | if (r < 0) |
1375 | goto fail; | |
de1c301e LP |
1376 | |
1377 | *ret = b; | |
1378 | return 0; | |
2571ead1 LP |
1379 | |
1380 | fail: | |
021a1e78 | 1381 | bus_free(b); |
2571ead1 | 1382 | return r; |
de1c301e LP |
1383 | } |
1384 | ||
09365592 | 1385 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1386 | _cleanup_free_ char *e = NULL; |
b4ca3f45 | 1387 | char *m = NULL, *c = NULL, *a; |
0f8bd8de | 1388 | |
09365592 LP |
1389 | assert(b); |
1390 | assert(host); | |
0f8bd8de | 1391 | |
7f0d207d LP |
1392 | /* Let's see if we shall enter some container */ |
1393 | m = strchr(host, ':'); | |
1394 | if (m) { | |
1395 | m++; | |
1396 | ||
1397 | /* Let's make sure this is not a port of some kind, | |
1398 | * and is a valid machine name. */ | |
1399 | if (!in_charset(m, "0123456789") && machine_name_is_valid(m)) { | |
1400 | char *t; | |
1401 | ||
1402 | /* Cut out the host part */ | |
1403 | t = strndupa(host, m - host - 1); | |
1404 | e = bus_address_escape(t); | |
1405 | if (!e) | |
1406 | return -ENOMEM; | |
1407 | ||
58c6e4a2 | 1408 | c = strjoina(",argv5=--machine=", m); |
7f0d207d LP |
1409 | } |
1410 | } | |
1411 | ||
1412 | if (!e) { | |
1413 | e = bus_address_escape(host); | |
1414 | if (!e) | |
1415 | return -ENOMEM; | |
1416 | } | |
0f8bd8de | 1417 | |
b4ca3f45 YW |
1418 | a = strjoin("unixexec:path=ssh,argv1=-xT,argv2=--,argv3=", e, ",argv4=systemd-stdio-bridge", c); |
1419 | if (!a) | |
0f8bd8de | 1420 | return -ENOMEM; |
a7893c6b | 1421 | |
b4ca3f45 YW |
1422 | free_and_replace(b->address, a); |
1423 | ||
09365592 LP |
1424 | return 0; |
1425 | } | |
1426 | ||
1427 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
1428 | sd_bus *bus; | |
1429 | int r; | |
1430 | ||
1431 | assert_return(host, -EINVAL); | |
1432 | assert_return(ret, -EINVAL); | |
1433 | ||
a7893c6b | 1434 | r = sd_bus_new(&bus); |
09365592 | 1435 | if (r < 0) |
a7893c6b | 1436 | return r; |
a7893c6b | 1437 | |
09365592 LP |
1438 | r = bus_set_address_system_remote(bus, host); |
1439 | if (r < 0) | |
1440 | goto fail; | |
1441 | ||
a7893c6b | 1442 | bus->bus_client = true; |
09365592 | 1443 | bus->trusted = false; |
3acc1daf | 1444 | bus->is_system = true; |
694859b5 | 1445 | bus->is_local = false; |
a7893c6b LP |
1446 | |
1447 | r = sd_bus_start(bus); | |
09365592 LP |
1448 | if (r < 0) |
1449 | goto fail; | |
a7893c6b LP |
1450 | |
1451 | *ret = bus; | |
1452 | return 0; | |
09365592 LP |
1453 | |
1454 | fail: | |
1455 | bus_free(bus); | |
1456 | return r; | |
a7893c6b LP |
1457 | } |
1458 | ||
de33fc62 | 1459 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1460 | _cleanup_free_ char *e = NULL; |
b4ca3f45 | 1461 | char *a; |
a7893c6b | 1462 | |
09365592 LP |
1463 | assert(b); |
1464 | assert(machine); | |
a7893c6b LP |
1465 | |
1466 | e = bus_address_escape(machine); | |
1467 | if (!e) | |
1468 | return -ENOMEM; | |
1469 | ||
b4ca3f45 YW |
1470 | a = strjoin("x-machine-unix:machine=", e); |
1471 | if (!a) | |
a7893c6b | 1472 | return -ENOMEM; |
0f8bd8de | 1473 | |
b4ca3f45 YW |
1474 | free_and_replace(b->address, a); |
1475 | ||
09365592 LP |
1476 | return 0; |
1477 | } | |
1478 | ||
de33fc62 | 1479 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
09365592 LP |
1480 | sd_bus *bus; |
1481 | int r; | |
1482 | ||
1483 | assert_return(machine, -EINVAL); | |
1484 | assert_return(ret, -EINVAL); | |
affcf189 | 1485 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1486 | |
0f8bd8de | 1487 | r = sd_bus_new(&bus); |
09365592 | 1488 | if (r < 0) |
0f8bd8de | 1489 | return r; |
0f8bd8de | 1490 | |
de33fc62 | 1491 | r = bus_set_address_system_machine(bus, machine); |
09365592 LP |
1492 | if (r < 0) |
1493 | goto fail; | |
1494 | ||
0f8bd8de | 1495 | bus->bus_client = true; |
09365592 | 1496 | bus->trusted = false; |
3acc1daf | 1497 | bus->is_system = true; |
694859b5 | 1498 | bus->is_local = false; |
0f8bd8de LP |
1499 | |
1500 | r = sd_bus_start(bus); | |
09365592 LP |
1501 | if (r < 0) |
1502 | goto fail; | |
0f8bd8de LP |
1503 | |
1504 | *ret = bus; | |
1505 | return 0; | |
09365592 LP |
1506 | |
1507 | fail: | |
1508 | bus_free(bus); | |
1509 | return r; | |
0f8bd8de LP |
1510 | } |
1511 | ||
d9f644e2 | 1512 | _public_ void sd_bus_close(sd_bus *bus) { |
0e586eae | 1513 | |
de1c301e LP |
1514 | if (!bus) |
1515 | return; | |
d5a2b9a6 LP |
1516 | if (bus->state == BUS_CLOSED) |
1517 | return; | |
1518 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1519 | return; |
1520 | ||
392cf1d0 SL |
1521 | /* Don't leave ssh hanging around */ |
1522 | bus_kill_exec(bus); | |
1523 | ||
3e0e196e | 1524 | bus_set_state(bus, BUS_CLOSED); |
e82c9509 | 1525 | |
40ca29a1 LP |
1526 | sd_bus_detach_event(bus); |
1527 | ||
0e586eae LP |
1528 | /* Drop all queued messages so that they drop references to |
1529 | * the bus object and the bus may be freed */ | |
1530 | bus_reset_queues(bus); | |
1531 | ||
8a5cd31e LP |
1532 | bus_close_io_fds(bus); |
1533 | bus_close_inotify_fd(bus); | |
de1c301e LP |
1534 | } |
1535 | ||
03976f7b LP |
1536 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
1537 | ||
1538 | if (!bus) | |
1539 | return NULL; | |
1540 | ||
392cf1d0 SL |
1541 | /* Have to do this before flush() to prevent hang */ |
1542 | bus_kill_exec(bus); | |
1543 | ||
03976f7b LP |
1544 | sd_bus_flush(bus); |
1545 | sd_bus_close(bus); | |
1546 | ||
1547 | return sd_bus_unref(bus); | |
1548 | } | |
1549 | ||
98c5bbc8 | 1550 | void bus_enter_closing(sd_bus *bus) { |
718db961 LP |
1551 | assert(bus); |
1552 | ||
8a5cd31e | 1553 | if (!IN_SET(bus->state, BUS_WATCH_BIND, BUS_OPENING, BUS_AUTHENTICATING, BUS_HELLO, BUS_RUNNING)) |
718db961 LP |
1554 | return; |
1555 | ||
3e0e196e | 1556 | bus_set_state(bus, BUS_CLOSING); |
718db961 LP |
1557 | } |
1558 | ||
d9f644e2 | 1559 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
4afd3348 LP |
1560 | |
1561 | if (!bus) | |
1562 | return NULL; | |
de1c301e | 1563 | |
e4ee6e5c | 1564 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1565 | |
de1c301e LP |
1566 | return bus; |
1567 | } | |
1568 | ||
d9f644e2 | 1569 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1570 | unsigned i; |
5b1bc83f LP |
1571 | |
1572 | if (!bus) | |
1573 | return NULL; | |
de1c301e | 1574 | |
f389bf15 LP |
1575 | i = REFCNT_DEC(bus->n_ref); |
1576 | if (i > 0) | |
1577 | return NULL; | |
1578 | ||
1579 | bus_free(bus); | |
de1c301e LP |
1580 | return NULL; |
1581 | } | |
1582 | ||
d9f644e2 | 1583 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 LP |
1584 | |
1585 | assert_return(bus, -EINVAL); | |
45b1f410 | 1586 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 1587 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 1588 | |
f54514f3 | 1589 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1590 | } |
1591 | ||
bdbc8669 LP |
1592 | _public_ int sd_bus_is_ready(sd_bus *bus) { |
1593 | assert_return(bus, -EINVAL); | |
45b1f410 | 1594 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
bdbc8669 LP |
1595 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1596 | ||
1597 | return bus->state == BUS_RUNNING; | |
1598 | } | |
1599 | ||
d9f644e2 | 1600 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1601 | int r; |
1602 | ||
d6888822 | 1603 | assert_return(bus, -EINVAL); |
45b1f410 | 1604 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
1605 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); |
1606 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1607 | |
c7db1984 | 1608 | if (bus->is_monitor) |
09365592 LP |
1609 | return 0; |
1610 | ||
d728d708 | 1611 | if (type == SD_BUS_TYPE_UNIX_FD) { |
c7db1984 | 1612 | if (!bus->accept_fd) |
021a1e78 LP |
1613 | return 0; |
1614 | ||
20902f3e | 1615 | r = bus_ensure_running(bus); |
d728d708 LP |
1616 | if (r < 0) |
1617 | return r; | |
de1c301e | 1618 | |
d728d708 LP |
1619 | return bus->can_fds; |
1620 | } | |
1621 | ||
1622 | return bus_type_is_valid(type); | |
de1c301e LP |
1623 | } |
1624 | ||
5c302692 | 1625 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1626 | int r; |
de1c301e | 1627 | |
d6888822 | 1628 | assert_return(bus, -EINVAL); |
45b1f410 | 1629 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
f7fce345 | 1630 | assert_return(id, -EINVAL); |
d6888822 | 1631 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1632 | |
20902f3e | 1633 | r = bus_ensure_running(bus); |
d728d708 LP |
1634 | if (r < 0) |
1635 | return r; | |
de1c301e | 1636 | |
f7fce345 | 1637 | *id = bus->server_id; |
d728d708 | 1638 | return 0; |
de1c301e LP |
1639 | } |
1640 | ||
3df7a7e6 | 1641 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
48ef41a3 LP |
1642 | int r; |
1643 | ||
7adc46fc | 1644 | assert(b); |
de1c301e LP |
1645 | assert(m); |
1646 | ||
aea93deb LP |
1647 | if (m->sealed) { |
1648 | /* If we copy the same message to multiple | |
693eb9a2 | 1649 | * destinations, avoid using the same cookie |
aea93deb | 1650 | * numbers. */ |
693eb9a2 | 1651 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1652 | return 0; |
aea93deb | 1653 | } |
de1c301e | 1654 | |
3df7a7e6 LP |
1655 | if (timeout == 0) |
1656 | timeout = BUS_DEFAULT_TIMEOUT; | |
1657 | ||
48ef41a3 LP |
1658 | if (!m->sender && b->patch_sender) { |
1659 | r = sd_bus_message_set_sender(m, b->patch_sender); | |
1660 | if (r < 0) | |
1661 | return r; | |
1662 | } | |
1663 | ||
75bcbcf2 | 1664 | return sd_bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1665 | } |
1666 | ||
e1c433c6 | 1667 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1668 | bool remarshal = false; |
1669 | ||
e1c433c6 LP |
1670 | assert(b); |
1671 | ||
908b8a42 DH |
1672 | /* wrong packet version */ |
1673 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1674 | remarshal = true; | |
1675 | ||
1676 | /* wrong packet endianness */ | |
1677 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1678 | remarshal = true; | |
1679 | ||
908b8a42 | 1680 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1681 | } |
1682 | ||
7adc46fc LP |
1683 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1684 | assert(b); | |
1685 | assert(m); | |
1686 | ||
52cd5877 LP |
1687 | /* Fake some timestamps, if they were requested, and not |
1688 | * already initialized */ | |
c7db1984 | 1689 | if (b->attach_timestamp) { |
52cd5877 LP |
1690 | if (m->realtime <= 0) |
1691 | m->realtime = now(CLOCK_REALTIME); | |
1692 | ||
1693 | if (m->monotonic <= 0) | |
1694 | m->monotonic = now(CLOCK_MONOTONIC); | |
1695 | } | |
1696 | ||
7adc46fc LP |
1697 | /* The bus specification says the serial number cannot be 0, |
1698 | * hence let's fill something in for synthetic messages. Since | |
1699 | * synthetic messages might have a fake sender and we don't | |
1700 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1701 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1702 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1703 | * even though kdbus can do 64bit. */ | |
75bcbcf2 | 1704 | return sd_bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1705 | } |
1706 | ||
66baf8c6 | 1707 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) { |
2e3db52d LP |
1708 | int r; |
1709 | ||
718db961 | 1710 | assert(bus); |
2e3db52d | 1711 | assert(m); |
718db961 | 1712 | |
a132bef0 | 1713 | r = bus_socket_write_message(bus, m, idx); |
2e3db52d LP |
1714 | if (r <= 0) |
1715 | return r; | |
1716 | ||
a132bef0 | 1717 | if (*idx >= BUS_MESSAGE_SIZE(m)) |
e32fd6b4 | 1718 | log_debug("Sent message type=%s sender=%s destination=%s path=%s interface=%s member=%s cookie=%" PRIu64 " reply_cookie=%" PRIu64 " signature=%s error-name=%s error-message=%s", |
2e3db52d LP |
1719 | bus_message_type_to_string(m->header->type), |
1720 | strna(sd_bus_message_get_sender(m)), | |
1721 | strna(sd_bus_message_get_destination(m)), | |
1722 | strna(sd_bus_message_get_path(m)), | |
1723 | strna(sd_bus_message_get_interface(m)), | |
1724 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1725 | BUS_MESSAGE_COOKIE(m), |
1726 | m->reply_cookie, | |
e32fd6b4 | 1727 | strna(m->root_container.signature), |
e28d0865 | 1728 | strna(m->error.name), |
2e3db52d LP |
1729 | strna(m->error.message)); |
1730 | ||
1731 | return r; | |
718db961 LP |
1732 | } |
1733 | ||
de1c301e | 1734 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1735 | int r, ret = 0; |
de1c301e LP |
1736 | |
1737 | assert(bus); | |
945c2931 | 1738 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1739 | |
de1c301e LP |
1740 | while (bus->wqueue_size > 0) { |
1741 | ||
66baf8c6 | 1742 | r = bus_write_message(bus, bus->wqueue[0], &bus->windex); |
718db961 | 1743 | if (r < 0) |
de1c301e | 1744 | return r; |
718db961 | 1745 | else if (r == 0) |
e3017af9 LP |
1746 | /* Didn't do anything this time */ |
1747 | return ret; | |
a132bef0 | 1748 | else if (bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1749 | /* Fully written. Let's drop the entry from |
1750 | * the queue. | |
1751 | * | |
1752 | * This isn't particularly optimized, but | |
1753 | * well, this is supposed to be our worst-case | |
1754 | * buffer only, and the socket buffer is | |
1755 | * supposed to be our primary buffer, and if | |
1756 | * it got full, then all bets are off | |
1757 | * anyway. */ | |
1758 | ||
313cefa1 | 1759 | bus->wqueue_size--; |
c4e6e242 | 1760 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1761 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1762 | bus->windex = 0; | |
1763 | ||
e3017af9 | 1764 | ret = 1; |
de1c301e LP |
1765 | } |
1766 | } | |
1767 | ||
e3017af9 | 1768 | return ret; |
de1c301e LP |
1769 | } |
1770 | ||
766c5809 | 1771 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1772 | assert(bus); |
1773 | ||
a132bef0 | 1774 | return bus_socket_read_message(bus); |
7d22c717 LP |
1775 | } |
1776 | ||
7adc46fc | 1777 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1778 | assert(bus); |
7d22c717 | 1779 | |
821e0756 | 1780 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1781 | return -ENOBUFS; |
1782 | ||
821e0756 | 1783 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1784 | return -ENOMEM; |
1785 | ||
7d22c717 LP |
1786 | return 0; |
1787 | } | |
1788 | ||
766c5809 | 1789 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1790 | int r, ret = 0; |
de1c301e LP |
1791 | |
1792 | assert(bus); | |
1793 | assert(m); | |
945c2931 | 1794 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1795 | |
766c5809 LP |
1796 | /* Note that the priority logic is only available on kdbus, |
1797 | * where the rqueue is unused. We check the rqueue here | |
1798 | * anyway, because it's simple... */ | |
1799 | ||
7d22c717 LP |
1800 | for (;;) { |
1801 | if (bus->rqueue_size > 0) { | |
1802 | /* Dispatch a queued message */ | |
de1c301e | 1803 | |
7d22c717 | 1804 | *m = bus->rqueue[0]; |
313cefa1 | 1805 | bus->rqueue_size--; |
7d22c717 LP |
1806 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); |
1807 | return 1; | |
1808 | } | |
de1c301e | 1809 | |
7d22c717 | 1810 | /* Try to read a new message */ |
766c5809 | 1811 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1812 | if (r < 0) |
e3017af9 | 1813 | return r; |
e3017af9 LP |
1814 | if (r == 0) |
1815 | return ret; | |
de1c301e | 1816 | |
2e8d788c | 1817 | ret = 1; |
7d22c717 | 1818 | } |
de1c301e LP |
1819 | } |
1820 | ||
66baf8c6 | 1821 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie) { |
4afd3348 | 1822 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1823 | int r; |
1824 | ||
d6888822 | 1825 | assert_return(m, -EINVAL); |
9030ca46 LP |
1826 | |
1827 | if (!bus) | |
1828 | bus = m->bus; | |
1829 | ||
d6888822 | 1830 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 1831 | |
a3d59cd1 LP |
1832 | if (!BUS_IS_OPEN(bus->state)) |
1833 | return -ENOTCONN; | |
1834 | ||
021a1e78 LP |
1835 | if (m->n_fds > 0) { |
1836 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1837 | if (r < 0) | |
1838 | return r; | |
1839 | if (r == 0) | |
15411c0c | 1840 | return -EOPNOTSUPP; |
021a1e78 | 1841 | } |
de1c301e | 1842 | |
693eb9a2 | 1843 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1844 | * is expected */ |
693eb9a2 | 1845 | if (!cookie && !m->sealed) |
0461f8cd | 1846 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1847 | |
3df7a7e6 | 1848 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1849 | if (r < 0) |
1850 | return r; | |
1851 | ||
441d56a1 | 1852 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1853 | * message and place a replacement in m */ |
1854 | r = bus_remarshal_message(bus, &m); | |
1855 | if (r < 0) | |
1856 | return r; | |
1857 | ||
5407f2de LP |
1858 | /* If this is a reply and no reply was requested, then let's |
1859 | * suppress this, if we can */ | |
997eadb5 LP |
1860 | if (m->dont_send) |
1861 | goto finish; | |
5407f2de | 1862 | |
945c2931 | 1863 | if (IN_SET(bus->state, BUS_RUNNING, BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1864 | size_t idx = 0; |
1865 | ||
66baf8c6 | 1866 | r = bus_write_message(bus, m, &idx); |
32f46480 | 1867 | if (r < 0) { |
103a5027 | 1868 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1869 | bus_enter_closing(bus); |
441d56a1 LP |
1870 | return -ECONNRESET; |
1871 | } | |
32f46480 | 1872 | |
de1c301e | 1873 | return r; |
997eadb5 LP |
1874 | } |
1875 | ||
a132bef0 | 1876 | if (idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1877 | /* Wasn't fully written. So let's remember how |
1878 | * much was written. Note that the first entry | |
1879 | * of the wqueue array is always allocated so | |
1880 | * that we always can remember how much was | |
1881 | * written. */ | |
1882 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1883 | bus->wqueue_size = 1; | |
1884 | bus->windex = idx; | |
1885 | } | |
997eadb5 | 1886 | |
de1c301e | 1887 | } else { |
de1c301e LP |
1888 | /* Just append it to the queue. */ |
1889 | ||
25220239 | 1890 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1891 | return -ENOBUFS; |
1892 | ||
821e0756 | 1893 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1894 | return -ENOMEM; |
1895 | ||
313cefa1 | 1896 | bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); |
de1c301e LP |
1897 | } |
1898 | ||
997eadb5 | 1899 | finish: |
693eb9a2 LP |
1900 | if (cookie) |
1901 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1902 | |
7a37d625 | 1903 | return 1; |
de1c301e LP |
1904 | } |
1905 | ||
693eb9a2 | 1906 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1907 | int r; |
1908 | ||
911121a7 | 1909 | assert_return(m, -EINVAL); |
9030ca46 LP |
1910 | |
1911 | if (!bus) | |
1912 | bus = m->bus; | |
1913 | ||
911121a7 LP |
1914 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1915 | ||
a3d59cd1 LP |
1916 | if (!BUS_IS_OPEN(bus->state)) |
1917 | return -ENOTCONN; | |
1918 | ||
911121a7 LP |
1919 | if (!streq_ptr(m->destination, destination)) { |
1920 | ||
1921 | if (!destination) | |
1922 | return -EEXIST; | |
1923 | ||
1924 | r = sd_bus_message_set_destination(m, destination); | |
1925 | if (r < 0) | |
1926 | return r; | |
1927 | } | |
1928 | ||
693eb9a2 | 1929 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1930 | } |
1931 | ||
ac8029fc LP |
1932 | static usec_t calc_elapse(sd_bus *bus, uint64_t usec) { |
1933 | assert(bus); | |
1934 | ||
de1c301e LP |
1935 | if (usec == (uint64_t) -1) |
1936 | return 0; | |
1937 | ||
ac8029fc LP |
1938 | /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel |
1939 | * with any connection setup states. Hence, if a method callback is started earlier than that we just store the | |
1940 | * relative timestamp, and afterwards the absolute one. */ | |
1941 | ||
1942 | if (IN_SET(bus->state, BUS_WATCH_BIND, BUS_OPENING, BUS_AUTHENTICATING)) | |
1943 | return usec; | |
1944 | else | |
1945 | return now(CLOCK_MONOTONIC) + usec; | |
de1c301e LP |
1946 | } |
1947 | ||
e3017af9 LP |
1948 | static int timeout_compare(const void *a, const void *b) { |
1949 | const struct reply_callback *x = a, *y = b; | |
1950 | ||
ac8029fc | 1951 | if (x->timeout_usec != 0 && y->timeout_usec == 0) |
e3017af9 LP |
1952 | return -1; |
1953 | ||
ac8029fc | 1954 | if (x->timeout_usec == 0 && y->timeout_usec != 0) |
e3017af9 LP |
1955 | return 1; |
1956 | ||
ac8029fc | 1957 | if (x->timeout_usec < y->timeout_usec) |
e3017af9 LP |
1958 | return -1; |
1959 | ||
ac8029fc | 1960 | if (x->timeout_usec > y->timeout_usec) |
e3017af9 LP |
1961 | return 1; |
1962 | ||
1963 | return 0; | |
1964 | } | |
1965 | ||
c49b30a2 | 1966 | _public_ int sd_bus_call_async( |
de1c301e | 1967 | sd_bus *bus, |
19befb2d | 1968 | sd_bus_slot **slot, |
e1c433c6 | 1969 | sd_bus_message *_m, |
52f3ba91 | 1970 | sd_bus_message_handler_t callback, |
de1c301e | 1971 | void *userdata, |
19befb2d | 1972 | uint64_t usec) { |
de1c301e | 1973 | |
4afd3348 LP |
1974 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
1975 | _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; | |
de1c301e LP |
1976 | int r; |
1977 | ||
d6888822 | 1978 | assert_return(m, -EINVAL); |
40ca29a1 | 1979 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
dbc526f0 | 1980 | assert_return(!m->sealed || (!!callback == !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)), -EINVAL); |
9030ca46 LP |
1981 | |
1982 | if (!bus) | |
1983 | bus = m->bus; | |
1984 | ||
d6888822 | 1985 | assert_return(!bus_pid_changed(bus), -ECHILD); |
89ffcd2a | 1986 | |
a3d59cd1 LP |
1987 | if (!BUS_IS_OPEN(bus->state)) |
1988 | return -ENOTCONN; | |
1989 | ||
dbc526f0 LP |
1990 | /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */ |
1991 | if (!callback && !slot && !m->sealed) | |
1992 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1993 | ||
c9fe4af7 | 1994 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1995 | if (r < 0) |
1996 | return r; | |
de1c301e | 1997 | |
3df7a7e6 LP |
1998 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1999 | if (r < 0) | |
2000 | return r; | |
e3017af9 | 2001 | |
3df7a7e6 | 2002 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
2003 | if (r < 0) |
2004 | return r; | |
2005 | ||
e1c433c6 LP |
2006 | r = bus_remarshal_message(bus, &m); |
2007 | if (r < 0) | |
2008 | return r; | |
2009 | ||
dbc526f0 LP |
2010 | if (slot || callback) { |
2011 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); | |
2012 | if (!s) | |
2013 | return -ENOMEM; | |
de1c301e | 2014 | |
dbc526f0 | 2015 | s->reply_callback.callback = callback; |
de1c301e | 2016 | |
dbc526f0 LP |
2017 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
2018 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); | |
e3017af9 | 2019 | if (r < 0) { |
dbc526f0 | 2020 | s->reply_callback.cookie = 0; |
e3017af9 LP |
2021 | return r; |
2022 | } | |
dbc526f0 LP |
2023 | |
2024 | s->reply_callback.timeout_usec = calc_elapse(bus, m->timeout); | |
2025 | if (s->reply_callback.timeout_usec != 0) { | |
2026 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
2027 | if (r < 0) { | |
2028 | s->reply_callback.timeout_usec = 0; | |
2029 | return r; | |
2030 | } | |
2031 | } | |
e3017af9 LP |
2032 | } |
2033 | ||
dbc526f0 | 2034 | r = sd_bus_send(bus, m, s ? &s->reply_callback.cookie : NULL); |
19befb2d | 2035 | if (r < 0) |
de1c301e | 2036 | return r; |
de1c301e | 2037 | |
19befb2d LP |
2038 | if (slot) |
2039 | *slot = s; | |
2040 | s = NULL; | |
e3017af9 | 2041 | |
19befb2d | 2042 | return r; |
de1c301e LP |
2043 | } |
2044 | ||
20902f3e | 2045 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
2046 | int r; |
2047 | ||
2048 | assert(bus); | |
2049 | ||
945c2931 | 2050 | if (IN_SET(bus->state, BUS_UNSET, BUS_CLOSED, BUS_CLOSING)) |
021a1e78 | 2051 | return -ENOTCONN; |
d728d708 LP |
2052 | if (bus->state == BUS_RUNNING) |
2053 | return 1; | |
89ffcd2a LP |
2054 | |
2055 | for (;;) { | |
2056 | r = sd_bus_process(bus, NULL); | |
2057 | if (r < 0) | |
2058 | return r; | |
d728d708 LP |
2059 | if (bus->state == BUS_RUNNING) |
2060 | return 1; | |
e3017af9 LP |
2061 | if (r > 0) |
2062 | continue; | |
89ffcd2a LP |
2063 | |
2064 | r = sd_bus_wait(bus, (uint64_t) -1); | |
2065 | if (r < 0) | |
2066 | return r; | |
2067 | } | |
2068 | } | |
2069 | ||
97f82db3 | 2070 | _public_ int sd_bus_call( |
de1c301e | 2071 | sd_bus *bus, |
97f82db3 | 2072 | sd_bus_message *_m, |
de1c301e LP |
2073 | uint64_t usec, |
2074 | sd_bus_error *error, | |
2075 | sd_bus_message **reply) { | |
2076 | ||
4afd3348 | 2077 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 2078 | usec_t timeout; |
693eb9a2 | 2079 | uint64_t cookie; |
7d22c717 LP |
2080 | unsigned i; |
2081 | int r; | |
de1c301e | 2082 | |
759e02e7 LP |
2083 | bus_assert_return(m, -EINVAL, error); |
2084 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
2085 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
2086 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
2087 | |
2088 | if (!bus) | |
2089 | bus = m->bus; | |
2090 | ||
759e02e7 | 2091 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
97f82db3 | 2092 | |
759e02e7 LP |
2093 | if (!BUS_IS_OPEN(bus->state)) { |
2094 | r = -ENOTCONN; | |
2095 | goto fail; | |
2096 | } | |
a3d59cd1 | 2097 | |
97f82db3 KS |
2098 | r = bus_ensure_running(bus); |
2099 | if (r < 0) | |
759e02e7 | 2100 | goto fail; |
97f82db3 | 2101 | |
a43b9ca3 | 2102 | i = bus->rqueue_size; |
97f82db3 KS |
2103 | |
2104 | r = bus_seal_message(bus, m, usec); | |
2105 | if (r < 0) | |
759e02e7 | 2106 | goto fail; |
97f82db3 KS |
2107 | |
2108 | r = bus_remarshal_message(bus, &m); | |
2109 | if (r < 0) | |
759e02e7 | 2110 | goto fail; |
97f82db3 | 2111 | |
66baf8c6 | 2112 | r = sd_bus_send(bus, m, &cookie); |
de1c301e | 2113 | if (r < 0) |
759e02e7 | 2114 | goto fail; |
de1c301e | 2115 | |
ac8029fc | 2116 | timeout = calc_elapse(bus, m->timeout); |
de1c301e LP |
2117 | |
2118 | for (;;) { | |
2119 | usec_t left; | |
de1c301e | 2120 | |
7d22c717 LP |
2121 | while (i < bus->rqueue_size) { |
2122 | sd_bus_message *incoming = NULL; | |
2123 | ||
2124 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2125 | |
693eb9a2 | 2126 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2127 | /* Found a match! */ |
2128 | ||
7d22c717 LP |
2129 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2130 | bus->rqueue_size--; | |
f9f97ca6 | 2131 | log_debug_bus_message(incoming); |
7d22c717 | 2132 | |
40ca29a1 | 2133 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2134 | |
c7db1984 | 2135 | if (incoming->n_fds <= 0 || bus->accept_fd) { |
2ce97e2b LP |
2136 | if (reply) |
2137 | *reply = incoming; | |
2138 | else | |
2139 | sd_bus_message_unref(incoming); | |
2140 | ||
2141 | return 1; | |
2142 | } | |
2143 | ||
2144 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2145 | sd_bus_message_unref(incoming); |
2146 | return r; | |
b7f247e0 | 2147 | |
759e02e7 | 2148 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2149 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2150 | sd_bus_message_unref(incoming); |
2151 | return r; | |
2152 | } else { | |
a43b9ca3 | 2153 | r = -EIO; |
759e02e7 LP |
2154 | goto fail; |
2155 | } | |
a8a07f89 | 2156 | |
693eb9a2 | 2157 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2158 | bus->unique_name && |
2159 | incoming->sender && | |
2160 | streq(bus->unique_name, incoming->sender)) { | |
2161 | ||
7d22c717 LP |
2162 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2163 | bus->rqueue_size--; | |
2164 | ||
a8a07f89 LP |
2165 | /* Our own message? Somebody is trying |
2166 | * to send its own client a message, | |
2167 | * let's not dead-lock, let's fail | |
2168 | * immediately. */ | |
2169 | ||
2170 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2171 | r = -ELOOP; |
2172 | goto fail; | |
de1c301e LP |
2173 | } |
2174 | ||
de1c301e | 2175 | /* Try to read more, right-away */ |
7d22c717 | 2176 | i++; |
de1c301e | 2177 | } |
7d22c717 | 2178 | |
766c5809 | 2179 | r = bus_read_message(bus, false, 0); |
32f46480 | 2180 | if (r < 0) { |
103a5027 | 2181 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2182 | bus_enter_closing(bus); |
759e02e7 | 2183 | r = -ECONNRESET; |
441d56a1 | 2184 | } |
32f46480 | 2185 | |
759e02e7 | 2186 | goto fail; |
32f46480 | 2187 | } |
7d22c717 | 2188 | if (r > 0) |
e3017af9 | 2189 | continue; |
de1c301e LP |
2190 | |
2191 | if (timeout > 0) { | |
2192 | usec_t n; | |
2193 | ||
2194 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2195 | if (n >= timeout) { |
2196 | r = -ETIMEDOUT; | |
2197 | goto fail; | |
2198 | } | |
de1c301e LP |
2199 | |
2200 | left = timeout - n; | |
2201 | } else | |
2202 | left = (uint64_t) -1; | |
2203 | ||
e3017af9 | 2204 | r = bus_poll(bus, true, left); |
de1c301e | 2205 | if (r < 0) |
759e02e7 LP |
2206 | goto fail; |
2207 | if (r == 0) { | |
2208 | r = -ETIMEDOUT; | |
2209 | goto fail; | |
2210 | } | |
de1c301e LP |
2211 | |
2212 | r = dispatch_wqueue(bus); | |
32f46480 | 2213 | if (r < 0) { |
103a5027 | 2214 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2215 | bus_enter_closing(bus); |
759e02e7 | 2216 | r = -ECONNRESET; |
441d56a1 | 2217 | } |
32f46480 | 2218 | |
759e02e7 | 2219 | goto fail; |
32f46480 | 2220 | } |
de1c301e | 2221 | } |
759e02e7 LP |
2222 | |
2223 | fail: | |
2224 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2225 | } |
2226 | ||
d9f644e2 | 2227 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2228 | |
2229 | assert_return(bus, -EINVAL); | |
45b1f410 | 2230 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
2231 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2232 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2233 | |
8a5cd31e LP |
2234 | if (bus->state == BUS_CLOSED) |
2235 | return -ENOTCONN; | |
2236 | ||
2237 | if (bus->inotify_fd >= 0) | |
2238 | return bus->inotify_fd; | |
2239 | ||
2240 | if (bus->input_fd >= 0) | |
2241 | return bus->input_fd; | |
2242 | ||
2243 | return -ENOTCONN; | |
de1c301e LP |
2244 | } |
2245 | ||
d9f644e2 | 2246 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2247 | int flags = 0; |
2248 | ||
d6888822 | 2249 | assert_return(bus, -EINVAL); |
45b1f410 | 2250 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 2251 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2252 | |
8a5cd31e LP |
2253 | switch (bus->state) { |
2254 | ||
2255 | case BUS_UNSET: | |
2256 | case BUS_CLOSED: | |
a3d59cd1 LP |
2257 | return -ENOTCONN; |
2258 | ||
8a5cd31e LP |
2259 | case BUS_WATCH_BIND: |
2260 | flags |= POLLIN; | |
2261 | break; | |
2262 | ||
2263 | case BUS_OPENING: | |
de1c301e | 2264 | flags |= POLLOUT; |
8a5cd31e | 2265 | break; |
89ffcd2a | 2266 | |
8a5cd31e | 2267 | case BUS_AUTHENTICATING: |
2181a7f5 | 2268 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2269 | flags |= POLLOUT; |
2270 | ||
2271 | flags |= POLLIN; | |
8a5cd31e | 2272 | break; |
89ffcd2a | 2273 | |
8a5cd31e LP |
2274 | case BUS_RUNNING: |
2275 | case BUS_HELLO: | |
de1c301e LP |
2276 | if (bus->rqueue_size <= 0) |
2277 | flags |= POLLIN; | |
2278 | if (bus->wqueue_size > 0) | |
2279 | flags |= POLLOUT; | |
8a5cd31e LP |
2280 | break; |
2281 | ||
2282 | case BUS_CLOSING: | |
2283 | break; | |
2284 | ||
2285 | default: | |
2286 | assert_not_reached("Unknown state"); | |
de1c301e LP |
2287 | } |
2288 | ||
2289 | return flags; | |
2290 | } | |
2291 | ||
d9f644e2 | 2292 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2293 | struct reply_callback *c; |
2294 | ||
d6888822 | 2295 | assert_return(bus, -EINVAL); |
45b1f410 | 2296 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 2297 | assert_return(timeout_usec, -EINVAL); |
d6888822 | 2298 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2299 | |
a3d59cd1 LP |
2300 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2301 | return -ENOTCONN; | |
2302 | ||
8f8f05a9 LP |
2303 | if (bus->track_queue) { |
2304 | *timeout_usec = 0; | |
2305 | return 1; | |
2306 | } | |
2307 | ||
8a5cd31e | 2308 | switch (bus->state) { |
718db961 | 2309 | |
8a5cd31e | 2310 | case BUS_AUTHENTICATING: |
e3017af9 LP |
2311 | *timeout_usec = bus->auth_timeout; |
2312 | return 1; | |
e3017af9 | 2313 | |
8a5cd31e LP |
2314 | case BUS_RUNNING: |
2315 | case BUS_HELLO: | |
2316 | if (bus->rqueue_size > 0) { | |
2317 | *timeout_usec = 0; | |
2318 | return 1; | |
2319 | } | |
2320 | ||
2321 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2322 | if (!c) { | |
2323 | *timeout_usec = (uint64_t) -1; | |
2324 | return 0; | |
2325 | } | |
2326 | ||
ac8029fc | 2327 | if (c->timeout_usec == 0) { |
8a5cd31e LP |
2328 | *timeout_usec = (uint64_t) -1; |
2329 | return 0; | |
2330 | } | |
2331 | ||
ac8029fc | 2332 | *timeout_usec = c->timeout_usec; |
8a5cd31e | 2333 | return 1; |
e3017af9 | 2334 | |
8a5cd31e | 2335 | case BUS_CLOSING: |
8efd6381 LP |
2336 | *timeout_usec = 0; |
2337 | return 1; | |
8efd6381 | 2338 | |
8a5cd31e LP |
2339 | case BUS_WATCH_BIND: |
2340 | case BUS_OPENING: | |
adee69fa | 2341 | *timeout_usec = (uint64_t) -1; |
e3017af9 LP |
2342 | return 0; |
2343 | ||
8a5cd31e LP |
2344 | default: |
2345 | assert_not_reached("Unknown or unexpected stat"); | |
19befb2d | 2346 | } |
e3017af9 LP |
2347 | } |
2348 | ||
2349 | static int process_timeout(sd_bus *bus) { | |
4afd3348 LP |
2350 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2351 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; | |
e3017af9 | 2352 | struct reply_callback *c; |
1b64f838 | 2353 | sd_bus_slot *slot; |
b057498a | 2354 | bool is_hello; |
e3017af9 LP |
2355 | usec_t n; |
2356 | int r; | |
2357 | ||
2358 | assert(bus); | |
ac8029fc | 2359 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
e3017af9 LP |
2360 | |
2361 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2362 | if (!c) | |
2363 | return 0; | |
2364 | ||
2365 | n = now(CLOCK_MONOTONIC); | |
ac8029fc | 2366 | if (c->timeout_usec > n) |
e3017af9 LP |
2367 | return 0; |
2368 | ||
eb01ba5d LP |
2369 | r = bus_message_new_synthetic_error( |
2370 | bus, | |
693eb9a2 | 2371 | c->cookie, |
14c24659 | 2372 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2373 | &m); |
2374 | if (r < 0) | |
2375 | return r; | |
2376 | ||
7adc46fc | 2377 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2378 | if (r < 0) |
2379 | return r; | |
2380 | ||
e3017af9 | 2381 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
ac8029fc | 2382 | c->timeout_usec = 0; |
19befb2d | 2383 | |
c9fe4af7 | 2384 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2385 | c->cookie = 0; |
2386 | ||
1b64f838 | 2387 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2388 | |
313cefa1 | 2389 | bus->iteration_counter++; |
718db961 | 2390 | |
b057498a LP |
2391 | is_hello = bus->state == BUS_HELLO && c->callback == hello_callback; |
2392 | ||
1b64f838 LP |
2393 | bus->current_message = m; |
2394 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2395 | bus->current_handler = c->callback; |
2396 | bus->current_userdata = slot->userdata; | |
19070062 | 2397 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2398 | bus->current_userdata = NULL; |
2399 | bus->current_handler = NULL; | |
d974ad05 | 2400 | bus->current_slot = NULL; |
19befb2d | 2401 | bus->current_message = NULL; |
718db961 | 2402 | |
1b64f838 LP |
2403 | if (slot->floating) { |
2404 | bus_slot_disconnect(slot); | |
2405 | sd_bus_slot_unref(slot); | |
2406 | } | |
2407 | ||
d974ad05 DH |
2408 | sd_bus_slot_unref(slot); |
2409 | ||
8a5cd31e LP |
2410 | /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log |
2411 | * and ignore the callback handler's return value. */ | |
b057498a LP |
2412 | if (is_hello) |
2413 | return r; | |
2414 | ||
1b64f838 | 2415 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2416 | } |
2417 | ||
9d373862 LP |
2418 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2419 | assert(bus); | |
2420 | assert(m); | |
2421 | ||
2422 | if (bus->state != BUS_HELLO) | |
2423 | return 0; | |
2424 | ||
2425 | /* Let's make sure the first message on the bus is the HELLO | |
2426 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2427 | * here (we leave that to the usual handling), we just verify |
2428 | * we don't let any earlier msg through. */ | |
9d373862 | 2429 | |
945c2931 | 2430 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
9d373862 LP |
2431 | return -EIO; |
2432 | ||
19befb2d | 2433 | if (m->reply_cookie != 1) |
9d373862 LP |
2434 | return -EIO; |
2435 | ||
2436 | return 0; | |
2437 | } | |
2438 | ||
a652755d | 2439 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
4afd3348 LP |
2440 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; |
2441 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
19befb2d | 2442 | struct reply_callback *c; |
1b64f838 | 2443 | sd_bus_slot *slot; |
b057498a | 2444 | bool is_hello; |
a652755d LP |
2445 | int r; |
2446 | ||
2447 | assert(bus); | |
2448 | assert(m); | |
2449 | ||
945c2931 | 2450 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
a652755d LP |
2451 | return 0; |
2452 | ||
09365592 LP |
2453 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) |
2454 | return 0; | |
2455 | ||
c9fe4af7 | 2456 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2457 | if (!c) |
2458 | return 0; | |
2459 | ||
19befb2d | 2460 | c->cookie = 0; |
19befb2d | 2461 | |
1b64f838 | 2462 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2463 | |
c7db1984 | 2464 | if (m->n_fds > 0 && !bus->accept_fd) { |
2ce97e2b LP |
2465 | |
2466 | /* If the reply contained a file descriptor which we | |
2467 | * didn't want we pass an error instead. */ | |
2468 | ||
2469 | r = bus_message_new_synthetic_error( | |
2470 | bus, | |
2471 | m->reply_cookie, | |
2472 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2473 | &synthetic_reply); | |
2474 | if (r < 0) | |
1b64f838 | 2475 | return r; |
2ce97e2b | 2476 | |
52cd5877 LP |
2477 | /* Copy over original timestamp */ |
2478 | synthetic_reply->realtime = m->realtime; | |
2479 | synthetic_reply->monotonic = m->monotonic; | |
2480 | synthetic_reply->seqnum = m->seqnum; | |
2481 | ||
2ce97e2b LP |
2482 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2483 | if (r < 0) | |
1b64f838 | 2484 | return r; |
2ce97e2b LP |
2485 | |
2486 | m = synthetic_reply; | |
2487 | } else { | |
2488 | r = sd_bus_message_rewind(m, true); | |
2489 | if (r < 0) | |
1b64f838 | 2490 | return r; |
2ce97e2b | 2491 | } |
88fe224c | 2492 | |
ac8029fc | 2493 | if (c->timeout_usec != 0) { |
1b64f838 | 2494 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
ac8029fc | 2495 | c->timeout_usec = 0; |
1b64f838 | 2496 | } |
19befb2d | 2497 | |
b057498a LP |
2498 | is_hello = bus->state == BUS_HELLO && c->callback == hello_callback; |
2499 | ||
1b64f838 | 2500 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2501 | bus->current_handler = c->callback; |
2502 | bus->current_userdata = slot->userdata; | |
19070062 | 2503 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2504 | bus->current_userdata = NULL; |
2505 | bus->current_handler = NULL; | |
d974ad05 | 2506 | bus->current_slot = NULL; |
a652755d | 2507 | |
19befb2d LP |
2508 | if (slot->floating) { |
2509 | bus_slot_disconnect(slot); | |
2510 | sd_bus_slot_unref(slot); | |
2511 | } | |
2512 | ||
d974ad05 DH |
2513 | sd_bus_slot_unref(slot); |
2514 | ||
8a5cd31e LP |
2515 | /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and |
2516 | * ignore the callback handler's return value. */ | |
b057498a LP |
2517 | if (is_hello) |
2518 | return r; | |
2519 | ||
1b64f838 | 2520 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2521 | } |
2522 | ||
2523 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
4afd3348 | 2524 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2525 | struct filter_callback *l; |
2526 | int r; | |
2527 | ||
392d5b37 LP |
2528 | assert(bus); |
2529 | assert(m); | |
2530 | ||
7286037f LP |
2531 | do { |
2532 | bus->filter_callbacks_modified = false; | |
2533 | ||
2534 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2535 | sd_bus_slot *slot; |
7286037f LP |
2536 | |
2537 | if (bus->filter_callbacks_modified) | |
2538 | break; | |
2539 | ||
2540 | /* Don't run this more than once per iteration */ | |
2541 | if (l->last_iteration == bus->iteration_counter) | |
2542 | continue; | |
2543 | ||
2544 | l->last_iteration = bus->iteration_counter; | |
2545 | ||
88fe224c LP |
2546 | r = sd_bus_message_rewind(m, true); |
2547 | if (r < 0) | |
2548 | return r; | |
2549 | ||
1b64f838 LP |
2550 | slot = container_of(l, sd_bus_slot, filter_callback); |
2551 | ||
2552 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2553 | bus->current_handler = l->callback; |
2554 | bus->current_userdata = slot->userdata; | |
19070062 | 2555 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2556 | bus->current_userdata = NULL; |
2557 | bus->current_handler = NULL; | |
1b64f838 | 2558 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2559 | |
ebcf1f97 | 2560 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2561 | if (r != 0) |
2562 | return r; | |
2563 | ||
2564 | } | |
2565 | ||
2566 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2567 | |
2568 | return 0; | |
2569 | } | |
2570 | ||
392d5b37 | 2571 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2572 | int r; |
2573 | ||
392d5b37 LP |
2574 | assert(bus); |
2575 | assert(m); | |
2576 | ||
7286037f LP |
2577 | do { |
2578 | bus->match_callbacks_modified = false; | |
2579 | ||
eb01ba5d | 2580 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2581 | if (r != 0) |
2582 | return r; | |
2583 | ||
2584 | } while (bus->match_callbacks_modified); | |
2585 | ||
2586 | return 0; | |
392d5b37 LP |
2587 | } |
2588 | ||
b9bf7e2b | 2589 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
4afd3348 | 2590 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
b9bf7e2b LP |
2591 | int r; |
2592 | ||
2593 | assert(bus); | |
2594 | assert(m); | |
2595 | ||
c7db1984 | 2596 | if (bus->is_monitor) |
09365592 LP |
2597 | return 0; |
2598 | ||
758bf0c7 LP |
2599 | if (bus->manual_peer_interface) |
2600 | return 0; | |
2601 | ||
40ca29a1 | 2602 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2603 | return 0; |
2604 | ||
2605 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2606 | return 0; | |
2607 | ||
0461f8cd | 2608 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2609 | return 1; |
2610 | ||
2611 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2612 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2613 | else if (streq_ptr(m->member, "GetMachineId")) { |
2614 | sd_id128_t id; | |
2615 | char sid[33]; | |
2616 | ||
2617 | r = sd_id128_get_machine(&id); | |
2618 | if (r < 0) | |
2619 | return r; | |
2620 | ||
df2d202e | 2621 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2622 | if (r < 0) |
2623 | return r; | |
2624 | ||
2625 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2626 | } else { | |
29ddb38f | 2627 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2628 | m, &reply, |
40ca29a1 | 2629 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2630 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2631 | } |
2632 | ||
2633 | if (r < 0) | |
2634 | return r; | |
2635 | ||
2636 | r = sd_bus_send(bus, reply, NULL); | |
2637 | if (r < 0) | |
2638 | return r; | |
2639 | ||
2640 | return 1; | |
2641 | } | |
2642 | ||
2ce97e2b LP |
2643 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2644 | assert(bus); | |
2645 | assert(m); | |
2646 | ||
2647 | /* If we got a message with a file descriptor which we didn't | |
2648 | * want to accept, then let's drop it. How can this even | |
2649 | * happen? For example, when the kernel queues a message into | |
2650 | * an activatable names's queue which allows fds, and then is | |
2651 | * delivered to us later even though we ourselves did not | |
2652 | * negotiate it. */ | |
2653 | ||
c7db1984 | 2654 | if (bus->is_monitor) |
09365592 LP |
2655 | return 0; |
2656 | ||
2ce97e2b LP |
2657 | if (m->n_fds <= 0) |
2658 | return 0; | |
2659 | ||
c7db1984 | 2660 | if (bus->accept_fd) |
2ce97e2b LP |
2661 | return 0; |
2662 | ||
2663 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2664 | return 1; /* just eat it up */ | |
2665 | ||
2666 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2667 | } | |
2668 | ||
992c052c | 2669 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2670 | int r; |
2671 | ||
2672 | assert(bus); | |
992c052c | 2673 | assert(m); |
e3017af9 | 2674 | |
19befb2d | 2675 | bus->current_message = m; |
992c052c | 2676 | bus->iteration_counter++; |
e3017af9 | 2677 | |
f9f97ca6 | 2678 | log_debug_bus_message(m); |
40ca29a1 | 2679 | |
992c052c LP |
2680 | r = process_hello(bus, m); |
2681 | if (r != 0) | |
affff0b6 | 2682 | goto finish; |
a652755d | 2683 | |
992c052c LP |
2684 | r = process_reply(bus, m); |
2685 | if (r != 0) | |
affff0b6 | 2686 | goto finish; |
e3017af9 | 2687 | |
2ce97e2b LP |
2688 | r = process_fd_check(bus, m); |
2689 | if (r != 0) | |
2690 | goto finish; | |
2691 | ||
992c052c LP |
2692 | r = process_filter(bus, m); |
2693 | if (r != 0) | |
affff0b6 | 2694 | goto finish; |
a652755d | 2695 | |
992c052c LP |
2696 | r = process_match(bus, m); |
2697 | if (r != 0) | |
affff0b6 | 2698 | goto finish; |
a652755d | 2699 | |
992c052c LP |
2700 | r = process_builtin(bus, m); |
2701 | if (r != 0) | |
affff0b6 LP |
2702 | goto finish; |
2703 | ||
2704 | r = bus_process_object(bus, m); | |
a652755d | 2705 | |
affff0b6 | 2706 | finish: |
19befb2d | 2707 | bus->current_message = NULL; |
affff0b6 | 2708 | return r; |
29ddb38f | 2709 | } |
88fe224c | 2710 | |
8f8f05a9 LP |
2711 | static int dispatch_track(sd_bus *bus) { |
2712 | assert(bus); | |
2713 | ||
2714 | if (!bus->track_queue) | |
2715 | return 0; | |
2716 | ||
2717 | bus_track_dispatch(bus->track_queue); | |
2718 | return 1; | |
2719 | } | |
2720 | ||
766c5809 | 2721 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
4afd3348 | 2722 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
29ddb38f | 2723 | int r; |
a652755d | 2724 | |
29ddb38f | 2725 | assert(bus); |
945c2931 | 2726 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
7286037f | 2727 | |
992c052c LP |
2728 | r = process_timeout(bus); |
2729 | if (r != 0) | |
2730 | goto null_message; | |
7286037f | 2731 | |
992c052c LP |
2732 | r = dispatch_wqueue(bus); |
2733 | if (r != 0) | |
2734 | goto null_message; | |
7286037f | 2735 | |
8f8f05a9 LP |
2736 | r = dispatch_track(bus); |
2737 | if (r != 0) | |
2738 | goto null_message; | |
2739 | ||
766c5809 | 2740 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2741 | if (r < 0) |
2742 | return r; | |
2743 | if (!m) | |
2744 | goto null_message; | |
7286037f | 2745 | |
992c052c LP |
2746 | r = process_message(bus, m); |
2747 | if (r != 0) | |
2748 | goto null_message; | |
7286037f | 2749 | |
992c052c LP |
2750 | if (ret) { |
2751 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2752 | if (r < 0) |
2753 | return r; | |
e3017af9 | 2754 | |
992c052c LP |
2755 | *ret = m; |
2756 | m = NULL; | |
2757 | return 1; | |
2758 | } | |
a652755d | 2759 | |
40ca29a1 | 2760 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2761 | |
dc74ce9b LP |
2762 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2763 | strna(sd_bus_message_get_sender(m)), | |
2764 | strna(sd_bus_message_get_path(m)), | |
2765 | strna(sd_bus_message_get_interface(m)), | |
2766 | strna(sd_bus_message_get_member(m))); | |
2767 | ||
992c052c | 2768 | r = sd_bus_reply_method_errorf( |
df2d202e | 2769 | m, |
40ca29a1 | 2770 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2771 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2772 | if (r < 0) |
2773 | return r; | |
2774 | } | |
e3017af9 | 2775 | |
992c052c | 2776 | return 1; |
0a72c2bd | 2777 | |
992c052c LP |
2778 | null_message: |
2779 | if (r >= 0 && ret) | |
2780 | *ret = NULL; | |
0a72c2bd | 2781 | |
992c052c | 2782 | return r; |
29ddb38f | 2783 | } |
0a72c2bd | 2784 | |
fbb4603d LP |
2785 | static int bus_exit_now(sd_bus *bus) { |
2786 | assert(bus); | |
2787 | ||
2788 | /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes | |
2789 | * sd_event_exit(), otherwise invokes libc exit(). */ | |
2790 | ||
2791 | if (bus->exited) /* did we already exit? */ | |
2792 | return 0; | |
2793 | if (!bus->exit_triggered) /* was the exit condition triggered? */ | |
2794 | return 0; | |
2795 | if (!bus->exit_on_disconnect) /* Shall we actually exit on disconnection? */ | |
2796 | return 0; | |
2797 | ||
2798 | bus->exited = true; /* never exit more than once */ | |
2799 | ||
2800 | log_debug("Bus connection disconnected, exiting."); | |
2801 | ||
2802 | if (bus->event) | |
2803 | return sd_event_exit(bus->event, EXIT_FAILURE); | |
2804 | else | |
2805 | exit(EXIT_FAILURE); | |
2806 | ||
2807 | assert_not_reached("exit() didn't exit?"); | |
2808 | } | |
2809 | ||
217fcc7e LP |
2810 | static int process_closing_reply_callback(sd_bus *bus, struct reply_callback *c) { |
2811 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
4afd3348 | 2812 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
217fcc7e | 2813 | sd_bus_slot *slot; |
718db961 LP |
2814 | int r; |
2815 | ||
2816 | assert(bus); | |
217fcc7e | 2817 | assert(c); |
718db961 | 2818 | |
217fcc7e LP |
2819 | r = bus_message_new_synthetic_error( |
2820 | bus, | |
2821 | c->cookie, | |
2822 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), | |
2823 | &m); | |
2824 | if (r < 0) | |
2825 | return r; | |
ebcf1f97 | 2826 | |
217fcc7e LP |
2827 | r = bus_seal_synthetic_message(bus, m); |
2828 | if (r < 0) | |
2829 | return r; | |
718db961 | 2830 | |
ac8029fc | 2831 | if (c->timeout_usec != 0) { |
217fcc7e | 2832 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
ac8029fc | 2833 | c->timeout_usec = 0; |
217fcc7e | 2834 | } |
718db961 | 2835 | |
217fcc7e LP |
2836 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
2837 | c->cookie = 0; | |
2838 | ||
2839 | slot = container_of(c, sd_bus_slot, reply_callback); | |
718db961 | 2840 | |
217fcc7e | 2841 | bus->iteration_counter++; |
19befb2d | 2842 | |
217fcc7e LP |
2843 | bus->current_message = m; |
2844 | bus->current_slot = sd_bus_slot_ref(slot); | |
2845 | bus->current_handler = c->callback; | |
2846 | bus->current_userdata = slot->userdata; | |
2847 | r = c->callback(m, slot->userdata, &error_buffer); | |
2848 | bus->current_userdata = NULL; | |
2849 | bus->current_handler = NULL; | |
2850 | bus->current_slot = NULL; | |
2851 | bus->current_message = NULL; | |
718db961 | 2852 | |
217fcc7e LP |
2853 | if (slot->floating) { |
2854 | bus_slot_disconnect(slot); | |
2855 | sd_bus_slot_unref(slot); | |
2856 | } | |
718db961 | 2857 | |
217fcc7e | 2858 | sd_bus_slot_unref(slot); |
1b64f838 | 2859 | |
217fcc7e LP |
2860 | return bus_maybe_reply_error(m, r, &error_buffer); |
2861 | } | |
718db961 | 2862 | |
217fcc7e LP |
2863 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2864 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
2865 | struct reply_callback *c; | |
2866 | int r; | |
d974ad05 | 2867 | |
217fcc7e LP |
2868 | assert(bus); |
2869 | assert(bus->state == BUS_CLOSING); | |
2870 | ||
2871 | /* First, fail all outstanding method calls */ | |
2872 | c = ordered_hashmap_first(bus->reply_callbacks); | |
2873 | if (c) | |
2874 | return process_closing_reply_callback(bus, c); | |
718db961 | 2875 | |
232f3677 LP |
2876 | /* Then, fake-drop all remaining bus tracking references */ |
2877 | if (bus->tracks) { | |
2878 | bus_track_close(bus->tracks); | |
2879 | return 1; | |
2880 | } | |
2881 | ||
718db961 LP |
2882 | /* Then, synthesize a Disconnected message */ |
2883 | r = sd_bus_message_new_signal( | |
2884 | bus, | |
151b9b96 | 2885 | &m, |
718db961 LP |
2886 | "/org/freedesktop/DBus/Local", |
2887 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2888 | "Disconnected"); |
718db961 LP |
2889 | if (r < 0) |
2890 | return r; | |
2891 | ||
fb6d9b77 | 2892 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2893 | |
7adc46fc | 2894 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2895 | if (r < 0) |
2896 | return r; | |
2897 | ||
2898 | sd_bus_close(bus); | |
2899 | ||
19befb2d | 2900 | bus->current_message = m; |
718db961 LP |
2901 | bus->iteration_counter++; |
2902 | ||
2903 | r = process_filter(bus, m); | |
2904 | if (r != 0) | |
2905 | goto finish; | |
2906 | ||
2907 | r = process_match(bus, m); | |
2908 | if (r != 0) | |
2909 | goto finish; | |
2910 | ||
fbb4603d LP |
2911 | /* Nothing else to do, exit now, if the condition holds */ |
2912 | bus->exit_triggered = true; | |
2913 | (void) bus_exit_now(bus); | |
2914 | ||
718db961 LP |
2915 | if (ret) { |
2916 | *ret = m; | |
2917 | m = NULL; | |
2918 | } | |
2919 | ||
2920 | r = 1; | |
2921 | ||
2922 | finish: | |
19befb2d LP |
2923 | bus->current_message = NULL; |
2924 | ||
718db961 LP |
2925 | return r; |
2926 | } | |
2927 | ||
766c5809 | 2928 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2929 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2930 | int r; |
0a72c2bd | 2931 | |
992c052c LP |
2932 | /* Returns 0 when we didn't do anything. This should cause the |
2933 | * caller to invoke sd_bus_wait() before returning the next | |
2934 | * time. Returns > 0 when we did something, which possibly | |
2935 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2936 | |
d6888822 | 2937 | assert_return(bus, -EINVAL); |
45b1f410 | 2938 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 2939 | assert_return(!bus_pid_changed(bus), -ECHILD); |
0a72c2bd | 2940 | |
992c052c | 2941 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2942 | assert_return(!bus->current_message, -EBUSY); |
2943 | assert(!bus->current_slot); | |
0a72c2bd | 2944 | |
992c052c | 2945 | switch (bus->state) { |
0a72c2bd | 2946 | |
992c052c | 2947 | case BUS_UNSET: |
992c052c | 2948 | return -ENOTCONN; |
0a72c2bd | 2949 | |
6d6f4904 LP |
2950 | case BUS_CLOSED: |
2951 | return -ECONNRESET; | |
2952 | ||
8a5cd31e LP |
2953 | case BUS_WATCH_BIND: |
2954 | r = bus_socket_process_watch_bind(bus); | |
2955 | break; | |
2956 | ||
992c052c LP |
2957 | case BUS_OPENING: |
2958 | r = bus_socket_process_opening(bus); | |
8a5cd31e | 2959 | break; |
a652755d | 2960 | |
992c052c | 2961 | case BUS_AUTHENTICATING: |
992c052c | 2962 | r = bus_socket_process_authenticating(bus); |
8a5cd31e | 2963 | break; |
a652755d | 2964 | |
992c052c LP |
2965 | case BUS_RUNNING: |
2966 | case BUS_HELLO: | |
766c5809 | 2967 | r = process_running(bus, hint_priority, priority, ret); |
8a5cd31e LP |
2968 | if (r >= 0) |
2969 | return r; | |
718db961 | 2970 | |
8a5cd31e LP |
2971 | /* This branch initializes *ret, hence we don't use the generic error checking below */ |
2972 | break; | |
718db961 LP |
2973 | |
2974 | case BUS_CLOSING: | |
2975 | return process_closing(bus, ret); | |
8a5cd31e LP |
2976 | |
2977 | default: | |
2978 | assert_not_reached("Unknown state"); | |
992c052c | 2979 | } |
43a43f50 | 2980 | |
8a5cd31e LP |
2981 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
2982 | bus_enter_closing(bus); | |
2983 | r = 1; | |
2984 | } else if (r < 0) | |
2985 | return r; | |
2986 | ||
2987 | if (ret) | |
2988 | *ret = NULL; | |
2989 | ||
2990 | return r; | |
e3017af9 LP |
2991 | } |
2992 | ||
766c5809 LP |
2993 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2994 | return bus_process_internal(bus, false, 0, ret); | |
2995 | } | |
2996 | ||
2997 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2998 | return bus_process_internal(bus, true, priority, ret); | |
2999 | } | |
3000 | ||
992c052c LP |
3001 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
3002 | struct pollfd p[2] = {}; | |
8a5cd31e | 3003 | int r, n; |
992c052c | 3004 | struct timespec ts; |
3a43da28 | 3005 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
3006 | |
3007 | assert(bus); | |
718db961 LP |
3008 | |
3009 | if (bus->state == BUS_CLOSING) | |
3010 | return 1; | |
3011 | ||
a3d59cd1 LP |
3012 | if (!BUS_IS_OPEN(bus->state)) |
3013 | return -ENOTCONN; | |
adcdb374 | 3014 | |
8a5cd31e LP |
3015 | if (bus->state == BUS_WATCH_BIND) { |
3016 | assert(bus->inotify_fd >= 0); | |
adcdb374 | 3017 | |
8a5cd31e LP |
3018 | p[0].events = POLLIN; |
3019 | p[0].fd = bus->inotify_fd; | |
992c052c LP |
3020 | n = 1; |
3021 | } else { | |
8a5cd31e LP |
3022 | int e; |
3023 | ||
3024 | e = sd_bus_get_events(bus); | |
3025 | if (e < 0) | |
3026 | return e; | |
3027 | ||
3028 | if (need_more) | |
3029 | /* The caller really needs some more data, he doesn't | |
3030 | * care about what's already read, or any timeouts | |
3031 | * except its own. */ | |
3032 | e |= POLLIN; | |
3033 | else { | |
3034 | usec_t until; | |
3035 | /* The caller wants to process if there's something to | |
3036 | * process, but doesn't care otherwise */ | |
3037 | ||
3038 | r = sd_bus_get_timeout(bus, &until); | |
3039 | if (r < 0) | |
3040 | return r; | |
3041 | if (r > 0) | |
3042 | m = usec_sub_unsigned(until, now(CLOCK_MONOTONIC)); | |
3043 | } | |
3044 | ||
3045 | p[0].fd = bus->input_fd; | |
3046 | if (bus->output_fd == bus->input_fd) { | |
3047 | p[0].events = e; | |
3048 | n = 1; | |
3049 | } else { | |
3050 | p[0].events = e & POLLIN; | |
3051 | p[1].fd = bus->output_fd; | |
3052 | p[1].events = e & POLLOUT; | |
3053 | n = 2; | |
3054 | } | |
adcdb374 LP |
3055 | } |
3056 | ||
8a5cd31e LP |
3057 | if (timeout_usec != (uint64_t) -1 && (m == USEC_INFINITY || timeout_usec < m)) |
3058 | m = timeout_usec; | |
3059 | ||
3060 | r = ppoll(p, n, m == USEC_INFINITY ? NULL : timespec_store(&ts, m), NULL); | |
adcdb374 | 3061 | if (r < 0) |
992c052c | 3062 | return -errno; |
adcdb374 | 3063 | |
992c052c | 3064 | return r > 0 ? 1 : 0; |
adcdb374 LP |
3065 | } |
3066 | ||
d9f644e2 | 3067 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 3068 | |
d6888822 | 3069 | assert_return(bus, -EINVAL); |
45b1f410 | 3070 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 3071 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 3072 | |
718db961 LP |
3073 | if (bus->state == BUS_CLOSING) |
3074 | return 0; | |
3075 | ||
a3d59cd1 LP |
3076 | if (!BUS_IS_OPEN(bus->state)) |
3077 | return -ENOTCONN; | |
718db961 | 3078 | |
992c052c LP |
3079 | if (bus->rqueue_size > 0) |
3080 | return 0; | |
9db76355 | 3081 | |
992c052c LP |
3082 | return bus_poll(bus, false, timeout_usec); |
3083 | } | |
9db76355 | 3084 | |
d9f644e2 | 3085 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 3086 | int r; |
9db76355 | 3087 | |
d6888822 | 3088 | assert_return(bus, -EINVAL); |
45b1f410 | 3089 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 3090 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 3091 | |
718db961 LP |
3092 | if (bus->state == BUS_CLOSING) |
3093 | return 0; | |
3094 | ||
a3d59cd1 LP |
3095 | if (!BUS_IS_OPEN(bus->state)) |
3096 | return -ENOTCONN; | |
718db961 | 3097 | |
8a5cd31e LP |
3098 | /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */ |
3099 | if (bus->state == BUS_WATCH_BIND) | |
3100 | return -EUNATCH; | |
3101 | ||
992c052c LP |
3102 | r = bus_ensure_running(bus); |
3103 | if (r < 0) | |
3104 | return r; | |
9db76355 | 3105 | |
992c052c LP |
3106 | if (bus->wqueue_size <= 0) |
3107 | return 0; | |
9db76355 | 3108 | |
992c052c LP |
3109 | for (;;) { |
3110 | r = dispatch_wqueue(bus); | |
32f46480 | 3111 | if (r < 0) { |
103a5027 | 3112 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 3113 | bus_enter_closing(bus); |
441d56a1 LP |
3114 | return -ECONNRESET; |
3115 | } | |
32f46480 | 3116 | |
9db76355 | 3117 | return r; |
32f46480 | 3118 | } |
9db76355 | 3119 | |
992c052c LP |
3120 | if (bus->wqueue_size <= 0) |
3121 | return 0; | |
9db76355 | 3122 | |
992c052c | 3123 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
3124 | if (r < 0) |
3125 | return r; | |
9db76355 | 3126 | } |
9db76355 LP |
3127 | } |
3128 | ||
19befb2d LP |
3129 | _public_ int sd_bus_add_filter( |
3130 | sd_bus *bus, | |
3131 | sd_bus_slot **slot, | |
3132 | sd_bus_message_handler_t callback, | |
3133 | void *userdata) { | |
d9f644e2 | 3134 | |
19befb2d | 3135 | sd_bus_slot *s; |
de1c301e | 3136 | |
d6888822 | 3137 | assert_return(bus, -EINVAL); |
45b1f410 | 3138 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
3139 | assert_return(callback, -EINVAL); |
3140 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 3141 | |
19befb2d LP |
3142 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
3143 | if (!s) | |
29ddb38f LP |
3144 | return -ENOMEM; |
3145 | ||
19befb2d | 3146 | s->filter_callback.callback = callback; |
a652755d | 3147 | |
19befb2d LP |
3148 | bus->filter_callbacks_modified = true; |
3149 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 3150 | |
19befb2d LP |
3151 | if (slot) |
3152 | *slot = s; | |
29ddb38f | 3153 | |
992c052c | 3154 | return 0; |
a652755d | 3155 | } |
392d5b37 | 3156 | |
7593c7a4 LP |
3157 | static int add_match_callback( |
3158 | sd_bus_message *m, | |
3159 | void *userdata, | |
3160 | sd_bus_error *ret_error) { | |
3161 | ||
3162 | sd_bus_slot *match_slot = userdata; | |
3163 | bool failed = false; | |
3164 | int r; | |
3165 | ||
3166 | assert(m); | |
3167 | assert(match_slot); | |
3168 | ||
3169 | sd_bus_slot_ref(match_slot); | |
3170 | ||
3171 | if (sd_bus_message_is_method_error(m, NULL)) { | |
3172 | log_debug_errno(sd_bus_message_get_errno(m), | |
3173 | "Unable to add match %s, failing connection: %s", | |
3174 | match_slot->match_callback.match_string, | |
3175 | sd_bus_message_get_error(m)->message); | |
3176 | ||
3177 | failed = true; | |
3178 | } else | |
3179 | log_debug("Match %s successfully installed.", match_slot->match_callback.match_string); | |
3180 | ||
3181 | if (match_slot->match_callback.install_callback) { | |
3182 | sd_bus *bus; | |
3183 | ||
3184 | bus = sd_bus_message_get_bus(m); | |
3185 | ||
3186 | /* This function has been called as slot handler, and we want to call another slot handler. Let's | |
3187 | * update the slot callback metadata temporarily with our own data, and then revert back to the old | |
3188 | * values. */ | |
3189 | ||
3190 | assert(bus->current_slot == match_slot->match_callback.install_slot); | |
3191 | assert(bus->current_handler == add_match_callback); | |
3192 | assert(bus->current_userdata == userdata); | |
3193 | ||
3194 | bus->current_slot = match_slot; | |
3195 | bus->current_handler = match_slot->match_callback.install_callback; | |
3196 | bus->current_userdata = match_slot->userdata; | |
3197 | ||
3198 | r = match_slot->match_callback.install_callback(m, match_slot->userdata, ret_error); | |
3199 | ||
3200 | bus->current_slot = match_slot->match_callback.install_slot; | |
3201 | bus->current_handler = add_match_callback; | |
3202 | bus->current_userdata = userdata; | |
3203 | ||
3204 | match_slot->match_callback.install_slot = sd_bus_slot_unref(match_slot->match_callback.install_slot); | |
3205 | } else { | |
3206 | if (failed) /* Generic failure handling: destroy the connection */ | |
3207 | bus_enter_closing(sd_bus_message_get_bus(m)); | |
3208 | ||
3209 | r = 1; | |
3210 | } | |
3211 | ||
3212 | if (failed && match_slot->floating) { | |
3213 | bus_slot_disconnect(match_slot); | |
3214 | sd_bus_slot_unref(match_slot); | |
3215 | } | |
3216 | ||
3217 | sd_bus_slot_unref(match_slot); | |
3218 | ||
3219 | return r; | |
3220 | } | |
3221 | ||
3222 | static int bus_add_match_full( | |
19befb2d LP |
3223 | sd_bus *bus, |
3224 | sd_bus_slot **slot, | |
7593c7a4 | 3225 | bool asynchronous, |
19befb2d LP |
3226 | const char *match, |
3227 | sd_bus_message_handler_t callback, | |
7593c7a4 | 3228 | sd_bus_message_handler_t install_callback, |
19befb2d | 3229 | void *userdata) { |
d9f644e2 | 3230 | |
992c052c LP |
3231 | struct bus_match_component *components = NULL; |
3232 | unsigned n_components = 0; | |
2915234d | 3233 | sd_bus_slot *s = NULL; |
992c052c | 3234 | int r = 0; |
392d5b37 | 3235 | |
d6888822 | 3236 | assert_return(bus, -EINVAL); |
45b1f410 | 3237 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
3238 | assert_return(match, -EINVAL); |
3239 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 3240 | |
992c052c LP |
3241 | r = bus_match_parse(match, &components, &n_components); |
3242 | if (r < 0) | |
3243 | goto finish; | |
29ddb38f | 3244 | |
19befb2d LP |
3245 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
3246 | if (!s) { | |
3247 | r = -ENOMEM; | |
3248 | goto finish; | |
3249 | } | |
3250 | ||
3251 | s->match_callback.callback = callback; | |
7593c7a4 | 3252 | s->match_callback.install_callback = install_callback; |
19befb2d | 3253 | |
992c052c | 3254 | if (bus->bus_client) { |
cc65fe5e | 3255 | enum bus_match_scope scope; |
29ddb38f | 3256 | |
cc65fe5e | 3257 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 3258 | |
7593c7a4 | 3259 | /* Do not install server-side matches for matches against the local service, interface or bus path. */ |
9ee7a50c | 3260 | if (scope != BUS_MATCH_LOCAL) { |
cc65fe5e | 3261 | |
7593c7a4 | 3262 | /* We store the original match string, so that we can use it to remove the match again. */ |
cc65fe5e | 3263 | |
a132bef0 ZJS |
3264 | s->match_callback.match_string = strdup(match); |
3265 | if (!s->match_callback.match_string) { | |
3266 | r = -ENOMEM; | |
3267 | goto finish; | |
19befb2d | 3268 | } |
19befb2d | 3269 | |
7593c7a4 LP |
3270 | if (asynchronous) |
3271 | r = bus_add_match_internal_async(bus, | |
3272 | &s->match_callback.install_slot, | |
3273 | s->match_callback.match_string, | |
3274 | add_match_callback, | |
3275 | s); | |
3276 | else | |
3277 | r = bus_add_match_internal(bus, s->match_callback.match_string); | |
cc65fe5e LP |
3278 | if (r < 0) |
3279 | goto finish; | |
3280 | ||
3281 | s->match_added = true; | |
3282 | } | |
392d5b37 LP |
3283 | } |
3284 | ||
992c052c | 3285 | bus->match_callbacks_modified = true; |
19befb2d LP |
3286 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3287 | if (r < 0) | |
3288 | goto finish; | |
3289 | ||
3290 | if (slot) | |
3291 | *slot = s; | |
3292 | s = NULL; | |
917b5dc7 | 3293 | |
992c052c LP |
3294 | finish: |
3295 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3296 | sd_bus_slot_unref(s); |
3297 | ||
992c052c | 3298 | return r; |
917b5dc7 LP |
3299 | } |
3300 | ||
7593c7a4 LP |
3301 | _public_ int sd_bus_add_match( |
3302 | sd_bus *bus, | |
3303 | sd_bus_slot **slot, | |
3304 | const char *match, | |
3305 | sd_bus_message_handler_t callback, | |
3306 | void *userdata) { | |
3307 | ||
3308 | return bus_add_match_full(bus, slot, false, match, callback, NULL, userdata); | |
3309 | } | |
3310 | ||
3311 | _public_ int sd_bus_add_match_async( | |
3312 | sd_bus *bus, | |
3313 | sd_bus_slot **slot, | |
3314 | const char *match, | |
3315 | sd_bus_message_handler_t callback, | |
3316 | sd_bus_message_handler_t install_callback, | |
3317 | void *userdata) { | |
3318 | ||
3319 | return bus_add_match_full(bus, slot, true, match, callback, install_callback, userdata); | |
3320 | } | |
3321 | ||
992c052c LP |
3322 | bool bus_pid_changed(sd_bus *bus) { |
3323 | assert(bus); | |
f10dda3b | 3324 | |
992c052c LP |
3325 | /* We don't support people creating a bus connection and |
3326 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3327 | |
df0ff127 | 3328 | return bus->original_pid != getpid_cached(); |
d5a2b9a6 | 3329 | } |
40ca29a1 LP |
3330 | |
3331 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3332 | sd_bus *bus = userdata; |
40ca29a1 LP |
3333 | int r; |
3334 | ||
3335 | assert(bus); | |
3336 | ||
8a5cd31e LP |
3337 | /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */ |
3338 | ||
40ca29a1 | 3339 | r = sd_bus_process(bus, NULL); |
5ae37ad8 LP |
3340 | if (r < 0) { |
3341 | log_debug_errno(r, "Processing of bus failed, closing down: %m"); | |
3342 | bus_enter_closing(bus); | |
3343 | } | |
40ca29a1 LP |
3344 | |
3345 | return 1; | |
3346 | } | |
3347 | ||
3348 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3349 | sd_bus *bus = userdata; |
40ca29a1 LP |
3350 | int r; |
3351 | ||
3352 | assert(bus); | |
3353 | ||
3354 | r = sd_bus_process(bus, NULL); | |
5ae37ad8 LP |
3355 | if (r < 0) { |
3356 | log_debug_errno(r, "Processing of bus failed, closing down: %m"); | |
3357 | bus_enter_closing(bus); | |
3358 | } | |
40ca29a1 LP |
3359 | |
3360 | return 1; | |
3361 | } | |
3362 | ||
3363 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3364 | sd_bus *bus = userdata; | |
3365 | int r, e; | |
3366 | usec_t until; | |
3367 | ||
3368 | assert(s); | |
3369 | assert(bus); | |
3370 | ||
3371 | e = sd_bus_get_events(bus); | |
5ae37ad8 LP |
3372 | if (e < 0) { |
3373 | r = e; | |
3374 | goto fail; | |
3375 | } | |
40ca29a1 LP |
3376 | |
3377 | if (bus->output_fd != bus->input_fd) { | |
3378 | ||
3379 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3380 | if (r < 0) | |
5ae37ad8 | 3381 | goto fail; |
40ca29a1 LP |
3382 | |
3383 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
5ae37ad8 | 3384 | } else |
40ca29a1 | 3385 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); |
5ae37ad8 LP |
3386 | if (r < 0) |
3387 | goto fail; | |
40ca29a1 LP |
3388 | |
3389 | r = sd_bus_get_timeout(bus, &until); | |
3390 | if (r < 0) | |
5ae37ad8 | 3391 | goto fail; |
40ca29a1 LP |
3392 | if (r > 0) { |
3393 | int j; | |
3394 | ||
3395 | j = sd_event_source_set_time(bus->time_event_source, until); | |
5ae37ad8 LP |
3396 | if (j < 0) { |
3397 | r = j; | |
3398 | goto fail; | |
3399 | } | |
40ca29a1 LP |
3400 | } |
3401 | ||
3402 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3403 | if (r < 0) | |
5ae37ad8 LP |
3404 | goto fail; |
3405 | ||
3406 | return 1; | |
3407 | ||
3408 | fail: | |
3409 | log_debug_errno(r, "Preparing of bus events failed, closing down: %m"); | |
3410 | bus_enter_closing(bus); | |
40ca29a1 LP |
3411 | |
3412 | return 1; | |
3413 | } | |
3414 | ||
abc5fe72 LP |
3415 | static int quit_callback(sd_event_source *event, void *userdata) { |
3416 | sd_bus *bus = userdata; | |
3417 | ||
3418 | assert(event); | |
3419 | ||
3420 | sd_bus_flush(bus); | |
7bb4d371 | 3421 | sd_bus_close(bus); |
abc5fe72 LP |
3422 | |
3423 | return 1; | |
3424 | } | |
3425 | ||
8a5cd31e | 3426 | int bus_attach_io_events(sd_bus *bus) { |
1e05d493 LP |
3427 | int r; |
3428 | ||
3429 | assert(bus); | |
3430 | ||
3431 | if (bus->input_fd < 0) | |
3432 | return 0; | |
3433 | ||
3434 | if (!bus->event) | |
3435 | return 0; | |
3436 | ||
3437 | if (!bus->input_io_event_source) { | |
151b9b96 | 3438 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3439 | if (r < 0) |
3440 | return r; | |
3441 | ||
3442 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3443 | if (r < 0) | |
3444 | return r; | |
3445 | ||
3446 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3447 | if (r < 0) |
3448 | return r; | |
3449 | ||
356779df | 3450 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3451 | } else |
3452 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3453 | ||
3454 | if (r < 0) | |
3455 | return r; | |
3456 | ||
3457 | if (bus->output_fd != bus->input_fd) { | |
3458 | assert(bus->output_fd >= 0); | |
3459 | ||
3460 | if (!bus->output_io_event_source) { | |
151b9b96 | 3461 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3462 | if (r < 0) |
3463 | return r; | |
3464 | ||
3465 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3466 | if (r < 0) |
3467 | return r; | |
3468 | ||
356779df | 3469 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3470 | } else |
3471 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3472 | ||
3473 | if (r < 0) | |
3474 | return r; | |
3475 | } | |
3476 | ||
3477 | return 0; | |
3478 | } | |
3479 | ||
8a5cd31e | 3480 | static void bus_detach_io_events(sd_bus *bus) { |
1e05d493 LP |
3481 | assert(bus); |
3482 | ||
3483 | if (bus->input_io_event_source) { | |
3484 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3485 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3486 | } | |
3487 | ||
3488 | if (bus->output_io_event_source) { | |
3489 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3490 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3491 | } | |
3492 | } | |
3493 | ||
8a5cd31e LP |
3494 | int bus_attach_inotify_event(sd_bus *bus) { |
3495 | int r; | |
3496 | ||
3497 | assert(bus); | |
3498 | ||
3499 | if (bus->inotify_fd < 0) | |
3500 | return 0; | |
3501 | ||
3502 | if (!bus->event) | |
3503 | return 0; | |
3504 | ||
3505 | if (!bus->inotify_event_source) { | |
3506 | r = sd_event_add_io(bus->event, &bus->inotify_event_source, bus->inotify_fd, EPOLLIN, io_callback, bus); | |
3507 | if (r < 0) | |
3508 | return r; | |
3509 | ||
3510 | r = sd_event_source_set_priority(bus->inotify_event_source, bus->event_priority); | |
3511 | if (r < 0) | |
3512 | return r; | |
3513 | ||
3514 | r = sd_event_source_set_description(bus->inotify_event_source, "bus-inotify"); | |
3515 | } else | |
3516 | r = sd_event_source_set_io_fd(bus->inotify_event_source, bus->inotify_fd); | |
3517 | if (r < 0) | |
3518 | return r; | |
3519 | ||
3520 | return 0; | |
3521 | } | |
3522 | ||
3523 | static void bus_detach_inotify_event(sd_bus *bus) { | |
3524 | assert(bus); | |
3525 | ||
3526 | if (bus->inotify_event_source) { | |
3527 | sd_event_source_set_enabled(bus->inotify_event_source, SD_EVENT_OFF); | |
3528 | bus->inotify_event_source = sd_event_source_unref(bus->inotify_event_source); | |
3529 | } | |
3530 | } | |
3531 | ||
d9f644e2 | 3532 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3533 | int r; |
3534 | ||
3535 | assert_return(bus, -EINVAL); | |
45b1f410 | 3536 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
40ca29a1 LP |
3537 | assert_return(!bus->event, -EBUSY); |
3538 | ||
3539 | assert(!bus->input_io_event_source); | |
3540 | assert(!bus->output_io_event_source); | |
3541 | assert(!bus->time_event_source); | |
3542 | ||
76b54375 LP |
3543 | if (event) |
3544 | bus->event = sd_event_ref(event); | |
3545 | else { | |
3546 | r = sd_event_default(&bus->event); | |
3547 | if (r < 0) | |
3548 | return r; | |
3549 | } | |
40ca29a1 | 3550 | |
1e05d493 | 3551 | bus->event_priority = priority; |
40ca29a1 | 3552 | |
6a0f1f6d | 3553 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3554 | if (r < 0) |
3555 | goto fail; | |
3556 | ||
3557 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3558 | if (r < 0) | |
3559 | goto fail; | |
3560 | ||
356779df | 3561 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3562 | if (r < 0) |
3563 | goto fail; | |
3564 | ||
151b9b96 | 3565 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3566 | if (r < 0) |
3567 | goto fail; | |
3568 | ||
356779df | 3569 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3570 | if (r < 0) |
3571 | goto fail; | |
3572 | ||
8a5cd31e LP |
3573 | r = bus_attach_io_events(bus); |
3574 | if (r < 0) | |
3575 | goto fail; | |
3576 | ||
3577 | r = bus_attach_inotify_event(bus); | |
1e05d493 LP |
3578 | if (r < 0) |
3579 | goto fail; | |
3580 | ||
40ca29a1 LP |
3581 | return 0; |
3582 | ||
3583 | fail: | |
3584 | sd_bus_detach_event(bus); | |
3585 | return r; | |
3586 | } | |
3587 | ||
d9f644e2 | 3588 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3589 | assert_return(bus, -EINVAL); |
45b1f410 | 3590 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
a82cafb9 LP |
3591 | |
3592 | if (!bus->event) | |
3593 | return 0; | |
40ca29a1 | 3594 | |
8a5cd31e LP |
3595 | bus_detach_io_events(bus); |
3596 | bus_detach_inotify_event(bus); | |
40ca29a1 | 3597 | |
86befb40 LP |
3598 | if (bus->time_event_source) { |
3599 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3600 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3601 | } |
40ca29a1 | 3602 | |
86befb40 LP |
3603 | if (bus->quit_event_source) { |
3604 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3605 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3606 | } |
abc5fe72 | 3607 | |
93f1bcf4 | 3608 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3609 | return 1; |
40ca29a1 | 3610 | } |
affff0b6 | 3611 | |
2be44176 LP |
3612 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3613 | assert_return(bus, NULL); | |
3614 | ||
3615 | return bus->event; | |
3616 | } | |
3617 | ||
19befb2d LP |
3618 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3619 | assert_return(bus, NULL); | |
3620 | ||
3621 | return bus->current_message; | |
3622 | } | |
3623 | ||
3624 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3625 | assert_return(bus, NULL); |
3626 | ||
19befb2d | 3627 | return bus->current_slot; |
affff0b6 | 3628 | } |
76b54375 | 3629 | |
caa82984 LP |
3630 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3631 | assert_return(bus, NULL); | |
3632 | ||
3633 | return bus->current_handler; | |
3634 | } | |
3635 | ||
3636 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3637 | assert_return(bus, NULL); | |
3638 | ||
3639 | return bus->current_userdata; | |
3640 | } | |
3641 | ||
76b54375 LP |
3642 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3643 | sd_bus *b = NULL; | |
3644 | int r; | |
3645 | ||
3646 | assert(bus_open); | |
3647 | assert(default_bus); | |
3648 | ||
3649 | if (!ret) | |
3650 | return !!*default_bus; | |
3651 | ||
3652 | if (*default_bus) { | |
3653 | *ret = sd_bus_ref(*default_bus); | |
3654 | return 0; | |
3655 | } | |
3656 | ||
3657 | r = bus_open(&b); | |
3658 | if (r < 0) | |
3659 | return r; | |
3660 | ||
3661 | b->default_bus_ptr = default_bus; | |
3662 | b->tid = gettid(); | |
3663 | *default_bus = b; | |
3664 | ||
3665 | *ret = b; | |
3666 | return 1; | |
3667 | } | |
3668 | ||
3669 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3670 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3671 | } | |
3672 | ||
76b54375 | 3673 | |
fa2f8973 | 3674 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3675 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3676 | } | |
3677 | ||
af08d2f9 | 3678 | _public_ int sd_bus_default(sd_bus **ret) { |
45b1f410 NM |
3679 | int (*bus_open)(sd_bus **) = NULL; |
3680 | sd_bus **busp; | |
af08d2f9 | 3681 | |
45b1f410 NM |
3682 | busp = bus_choose_default(&bus_open); |
3683 | return bus_default(bus_open, busp, ret); | |
af08d2f9 LP |
3684 | } |
3685 | ||
76b54375 LP |
3686 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3687 | assert_return(b, -EINVAL); | |
3688 | assert_return(tid, -EINVAL); | |
3689 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3690 | ||
3691 | if (b->tid != 0) { | |
3692 | *tid = b->tid; | |
3693 | return 0; | |
3694 | } | |
3695 | ||
3696 | if (b->event) | |
3697 | return sd_event_get_tid(b->event, tid); | |
3698 | ||
3699 | return -ENXIO; | |
3700 | } | |
28383ba1 | 3701 | |
a6278b88 LP |
3702 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3703 | _cleanup_free_ char *e = NULL; | |
3704 | char *ret; | |
3705 | ||
3706 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3707 | assert_return(external_id, -EINVAL); | |
3708 | assert_return(ret_path, -EINVAL); | |
3709 | ||
3710 | e = bus_label_escape(external_id); | |
3711 | if (!e) | |
3712 | return -ENOMEM; | |
3713 | ||
605405c6 | 3714 | ret = strjoin(prefix, "/", e); |
a6278b88 LP |
3715 | if (!ret) |
3716 | return -ENOMEM; | |
3717 | ||
3718 | *ret_path = ret; | |
3719 | return 0; | |
28383ba1 LP |
3720 | } |
3721 | ||
a6278b88 LP |
3722 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3723 | const char *e; | |
3724 | char *ret; | |
3725 | ||
3726 | assert_return(object_path_is_valid(path), -EINVAL); | |
3727 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3728 | assert_return(external_id, -EINVAL); | |
3729 | ||
3730 | e = object_path_startswith(path, prefix); | |
3731 | if (!e) { | |
3732 | *external_id = NULL; | |
3733 | return 0; | |
3734 | } | |
3735 | ||
3736 | ret = bus_label_unescape(e); | |
3737 | if (!ret) | |
3738 | return -ENOMEM; | |
3739 | ||
3740 | *external_id = ret; | |
3741 | return 1; | |
28383ba1 | 3742 | } |
5b12334d | 3743 | |
dfb815c3 DH |
3744 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3745 | _cleanup_strv_free_ char **labels = NULL; | |
3746 | char *path, *path_pos, **label_pos; | |
3747 | const char *sep, *template_pos; | |
3748 | size_t path_length; | |
3749 | va_list list; | |
3750 | int r; | |
3751 | ||
3752 | assert_return(out, -EINVAL); | |
3753 | assert_return(path_template, -EINVAL); | |
3754 | ||
3755 | path_length = strlen(path_template); | |
3756 | ||
19932084 | 3757 | va_start(list, path_template); |
dfb815c3 DH |
3758 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3759 | const char *arg; | |
3760 | char *label; | |
3761 | ||
3762 | arg = va_arg(list, const char *); | |
3763 | if (!arg) { | |
3764 | va_end(list); | |
3765 | return -EINVAL; | |
3766 | } | |
3767 | ||
3768 | label = bus_label_escape(arg); | |
3769 | if (!label) { | |
3770 | va_end(list); | |
3771 | return -ENOMEM; | |
3772 | } | |
3773 | ||
3774 | r = strv_consume(&labels, label); | |
3775 | if (r < 0) { | |
3776 | va_end(list); | |
3777 | return r; | |
3778 | } | |
3779 | ||
3780 | /* add label length, but account for the format character */ | |
3781 | path_length += strlen(label) - 1; | |
3782 | } | |
3783 | va_end(list); | |
3784 | ||
3785 | path = malloc(path_length + 1); | |
3786 | if (!path) | |
3787 | return -ENOMEM; | |
3788 | ||
3789 | path_pos = path; | |
3790 | label_pos = labels; | |
3791 | ||
3792 | for (template_pos = path_template; *template_pos; ) { | |
3793 | sep = strchrnul(template_pos, '%'); | |
3794 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3795 | if (!*sep) | |
3796 | break; | |
3797 | ||
3798 | path_pos = stpcpy(path_pos, *label_pos++); | |
3799 | template_pos = sep + 1; | |
3800 | } | |
3801 | ||
3802 | *path_pos = 0; | |
3803 | *out = path; | |
3804 | return 0; | |
3805 | } | |
3806 | ||
3807 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3808 | _cleanup_strv_free_ char **labels = NULL; | |
3809 | const char *template_pos, *path_pos; | |
3810 | char **label_pos; | |
3811 | va_list list; | |
3812 | int r; | |
3813 | ||
3814 | /* | |
3815 | * This decodes an object-path based on a template argument. The | |
3816 | * template consists of a verbatim path, optionally including special | |
3817 | * directives: | |
3818 | * | |
3819 | * - Each occurrence of '%' in the template matches an arbitrary | |
3820 | * substring of a label in the given path. At most one such | |
3821 | * directive is allowed per label. For each such directive, the | |
3822 | * caller must provide an output parameter (char **) via va_arg. If | |
3823 | * NULL is passed, the given label is verified, but not returned. | |
3824 | * For each matched label, the *decoded* label is stored in the | |
3825 | * passed output argument, and the caller is responsible to free | |
3826 | * it. Note that the output arguments are only modified if the | |
3827 | * actualy path matched the template. Otherwise, they're left | |
3828 | * untouched. | |
3829 | * | |
3830 | * This function returns <0 on error, 0 if the path does not match the | |
3831 | * template, 1 if it matched. | |
3832 | */ | |
3833 | ||
3834 | assert_return(path, -EINVAL); | |
3835 | assert_return(path_template, -EINVAL); | |
3836 | ||
3837 | path_pos = path; | |
3838 | ||
3839 | for (template_pos = path_template; *template_pos; ) { | |
3840 | const char *sep; | |
3841 | size_t length; | |
3842 | char *label; | |
3843 | ||
3844 | /* verify everything until the next '%' matches verbatim */ | |
3845 | sep = strchrnul(template_pos, '%'); | |
3846 | length = sep - template_pos; | |
3847 | if (strncmp(path_pos, template_pos, length)) | |
3848 | return 0; | |
3849 | ||
3850 | path_pos += length; | |
3851 | template_pos += length; | |
3852 | ||
3853 | if (!*template_pos) | |
3854 | break; | |
3855 | ||
3856 | /* We found the next '%' character. Everything up until here | |
3857 | * matched. We now skip ahead to the end of this label and make | |
3858 | * sure it matches the tail of the label in the path. Then we | |
3859 | * decode the string in-between and save it for later use. */ | |
3860 | ||
3861 | ++template_pos; /* skip over '%' */ | |
3862 | ||
3863 | sep = strchrnul(template_pos, '/'); | |
3864 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3865 | ||
3866 | /* verify the suffixes match */ | |
3867 | sep = strchrnul(path_pos, '/'); | |
3868 | if (sep - path_pos < (ssize_t)length || | |
3869 | strncmp(sep - length, template_pos, length)) | |
3870 | return 0; | |
3871 | ||
3872 | template_pos += length; /* skip over matched label */ | |
3873 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3874 | ||
3875 | /* store unescaped label for later use */ | |
3876 | label = bus_label_unescape_n(path_pos, length); | |
3877 | if (!label) | |
3878 | return -ENOMEM; | |
3879 | ||
3880 | r = strv_consume(&labels, label); | |
3881 | if (r < 0) | |
3882 | return r; | |
3883 | ||
3884 | path_pos = sep; /* skip decoded label and suffix */ | |
3885 | } | |
3886 | ||
3887 | /* end of template must match end of path */ | |
3888 | if (*path_pos) | |
3889 | return 0; | |
3890 | ||
3891 | /* copy the labels over to the caller */ | |
19932084 | 3892 | va_start(list, path_template); |
dfb815c3 DH |
3893 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3894 | char **arg; | |
3895 | ||
3896 | arg = va_arg(list, char **); | |
3897 | if (arg) | |
3898 | *arg = *label_pos; | |
3899 | else | |
3900 | free(*label_pos); | |
3901 | } | |
3902 | va_end(list); | |
3903 | ||
86ed6d1b | 3904 | labels = mfree(labels); |
dfb815c3 DH |
3905 | return 1; |
3906 | } | |
3907 | ||
ae095f86 | 3908 | _public_ int sd_bus_try_close(sd_bus *bus) { |
ae095f86 | 3909 | assert_return(bus, -EINVAL); |
45b1f410 | 3910 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
ae095f86 | 3911 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 | 3912 | |
a132bef0 | 3913 | return -EOPNOTSUPP; |
ae095f86 | 3914 | } |
5972fe95 | 3915 | |
455971c1 | 3916 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3917 | assert_return(bus, -EINVAL); |
45b1f410 | 3918 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
455971c1 | 3919 | assert_return(description, -EINVAL); |
f4b2933e | 3920 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3921 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3922 | ||
201e419a LP |
3923 | if (bus->description) |
3924 | *description = bus->description; | |
3925 | else if (bus->is_system) | |
3926 | *description = "system"; | |
3927 | else if (bus->is_user) | |
3928 | *description = "user"; | |
3929 | else | |
3930 | *description = NULL; | |
3931 | ||
5972fe95 LP |
3932 | return 0; |
3933 | } | |
fe3f22d1 DK |
3934 | |
3935 | int bus_get_root_path(sd_bus *bus) { | |
3936 | int r; | |
3937 | ||
3938 | if (bus->cgroup_root) | |
3939 | return 0; | |
3940 | ||
3941 | r = cg_get_root_path(&bus->cgroup_root); | |
3942 | if (r == -ENOENT) { | |
3943 | bus->cgroup_root = strdup("/"); | |
3944 | if (!bus->cgroup_root) | |
3945 | return -ENOMEM; | |
3946 | ||
3947 | r = 0; | |
3948 | } | |
3949 | ||
3950 | return r; | |
3951 | } | |
3acc1daf LP |
3952 | |
3953 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3acc1daf | 3954 | assert_return(bus, -EINVAL); |
45b1f410 | 3955 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
3acc1daf LP |
3956 | assert_return(scope, -EINVAL); |
3957 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3958 | ||
3acc1daf LP |
3959 | if (bus->is_user) { |
3960 | *scope = "user"; | |
5b820358 | 3961 | return 0; |
3acc1daf LP |
3962 | } |
3963 | ||
3964 | if (bus->is_system) { | |
3965 | *scope = "system"; | |
5b820358 LP |
3966 | return 0; |
3967 | } | |
3968 | ||
3969 | return -ENODATA; | |
3970 | } | |
3971 | ||
3972 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3973 | ||
3974 | assert_return(bus, -EINVAL); | |
45b1f410 | 3975 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
5b820358 LP |
3976 | assert_return(address, -EINVAL); |
3977 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3978 | ||
3979 | if (bus->address) { | |
3980 | *address = bus->address; | |
3981 | return 0; | |
3acc1daf LP |
3982 | } |
3983 | ||
3984 | return -ENODATA; | |
3985 | } | |
224b3787 | 3986 | |
882897af | 3987 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 | 3988 | assert_return(bus, -EINVAL); |
45b1f410 | 3989 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
3990 | assert_return(mask, -EINVAL); |
3991 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3992 | ||
3993 | *mask = bus->creds_mask; | |
3994 | return 0; | |
3995 | } | |
3996 | ||
882897af | 3997 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 | 3998 | assert_return(bus, -EINVAL); |
45b1f410 | 3999 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
4000 | assert_return(!bus_pid_changed(bus), -ECHILD); |
4001 | ||
4002 | return bus->bus_client; | |
4003 | } | |
4004 | ||
882897af | 4005 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 | 4006 | assert_return(bus, -EINVAL); |
45b1f410 | 4007 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
4008 | assert_return(!bus_pid_changed(bus), -ECHILD); |
4009 | ||
4010 | return bus->is_server; | |
4011 | } | |
4012 | ||
882897af | 4013 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 | 4014 | assert_return(bus, -EINVAL); |
45b1f410 | 4015 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
4016 | assert_return(!bus_pid_changed(bus), -ECHILD); |
4017 | ||
4018 | return bus->anonymous_auth; | |
4019 | } | |
4020 | ||
882897af | 4021 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 | 4022 | assert_return(bus, -EINVAL); |
45b1f410 | 4023 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
4024 | assert_return(!bus_pid_changed(bus), -ECHILD); |
4025 | ||
4026 | return bus->trusted; | |
4027 | } | |
4028 | ||
882897af | 4029 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 | 4030 | assert_return(bus, -EINVAL); |
45b1f410 | 4031 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
4032 | assert_return(!bus_pid_changed(bus), -ECHILD); |
4033 | ||
c7db1984 | 4034 | return bus->is_monitor; |
224b3787 | 4035 | } |
fa2f8973 LP |
4036 | |
4037 | static void flush_close(sd_bus *bus) { | |
4038 | if (!bus) | |
4039 | return; | |
4040 | ||
4041 | /* Flushes and closes the specified bus. We take a ref before, | |
4042 | * to ensure the flushing does not cause the bus to be | |
4043 | * unreferenced. */ | |
4044 | ||
4045 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
4046 | } | |
4047 | ||
4048 | _public_ void sd_bus_default_flush_close(void) { | |
4049 | flush_close(default_starter_bus); | |
4050 | flush_close(default_user_bus); | |
4051 | flush_close(default_system_bus); | |
4052 | } | |
fbb4603d LP |
4053 | |
4054 | _public_ int sd_bus_set_exit_on_disconnect(sd_bus *bus, int b) { | |
4055 | assert_return(bus, -EINVAL); | |
45b1f410 | 4056 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
fbb4603d LP |
4057 | |
4058 | /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already | |
4059 | * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never | |
4060 | * from the client side. */ | |
4061 | bus->exit_on_disconnect = b; | |
4062 | ||
4063 | /* If the exit condition was triggered already, exit immediately. */ | |
4064 | return bus_exit_now(bus); | |
4065 | } | |
4066 | ||
4067 | _public_ int sd_bus_get_exit_on_disconnect(sd_bus *bus) { | |
4068 | assert_return(bus, -EINVAL); | |
45b1f410 | 4069 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
fbb4603d LP |
4070 | |
4071 | return bus->exit_on_disconnect; | |
4072 | } | |
48ef41a3 LP |
4073 | |
4074 | _public_ int sd_bus_set_sender(sd_bus *bus, const char *sender) { | |
4075 | assert_return(bus, -EINVAL); | |
45b1f410 | 4076 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
48ef41a3 LP |
4077 | assert_return(!bus->bus_client, -EPERM); |
4078 | assert_return(!sender || service_name_is_valid(sender), -EINVAL); | |
4079 | ||
4080 | return free_and_strdup(&bus->patch_sender, sender); | |
4081 | } | |
4082 | ||
4083 | _public_ int sd_bus_get_sender(sd_bus *bus, const char **ret) { | |
4084 | assert_return(bus, -EINVAL); | |
45b1f410 | 4085 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
48ef41a3 LP |
4086 | assert_return(ret, -EINVAL); |
4087 | ||
4088 | if (!bus->patch_sender) | |
4089 | return -ENODATA; | |
4090 | ||
4091 | *ret = bus->patch_sender; | |
4092 | return 0; | |
4093 | } |