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Commit | Line | Data |
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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 | |
de1c301e LP |
6 | ***/ |
7 | ||
8 | #include <endian.h> | |
de1c301e | 9 | #include <netdb.h> |
0a6f50c0 | 10 | #include <poll.h> |
45fbe937 | 11 | #include <pthread.h> |
392cf1d0 | 12 | #include <signal.h> |
cf0fbc49 TA |
13 | #include <stdlib.h> |
14 | #include <sys/mman.h> | |
392cf1d0 | 15 | #include <sys/wait.h> |
cf0fbc49 | 16 | #include <unistd.h> |
de1c301e | 17 | |
de1c301e | 18 | #include "sd-bus.h" |
07630cea | 19 | |
b5efdb8a | 20 | #include "alloc-util.h" |
07630cea LP |
21 | #include "bus-container.h" |
22 | #include "bus-control.h" | |
de1c301e | 23 | #include "bus-internal.h" |
6629161f | 24 | #include "bus-kernel.h" |
07630cea LP |
25 | #include "bus-label.h" |
26 | #include "bus-message.h" | |
992c052c | 27 | #include "bus-objects.h" |
0461f8cd | 28 | #include "bus-protocol.h" |
19befb2d | 29 | #include "bus-slot.h" |
07630cea LP |
30 | #include "bus-socket.h" |
31 | #include "bus-track.h" | |
32 | #include "bus-type.h" | |
33 | #include "bus-util.h" | |
34 | #include "cgroup-util.h" | |
35 | #include "def.h" | |
3ffd4af2 | 36 | #include "fd-util.h" |
cf0fbc49 | 37 | #include "hexdecoct.h" |
07630cea LP |
38 | #include "hostname-util.h" |
39 | #include "macro.h" | |
40 | #include "missing.h" | |
6bedfcbb | 41 | #include "parse-util.h" |
dccca82b | 42 | #include "process-util.h" |
07630cea LP |
43 | #include "string-util.h" |
44 | #include "strv.h" | |
45 | #include "util.h" | |
de1c301e | 46 | |
b56c4604 LP |
47 | #define log_debug_bus_message(m) \ |
48 | do { \ | |
49 | sd_bus_message *_mm = (m); \ | |
e32fd6b4 | 50 | 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 |
51 | bus_message_type_to_string(_mm->header->type), \ |
52 | strna(sd_bus_message_get_sender(_mm)), \ | |
53 | strna(sd_bus_message_get_destination(_mm)), \ | |
54 | strna(sd_bus_message_get_path(_mm)), \ | |
55 | strna(sd_bus_message_get_interface(_mm)), \ | |
56 | strna(sd_bus_message_get_member(_mm)), \ | |
57 | BUS_MESSAGE_COOKIE(_mm), \ | |
58 | _mm->reply_cookie, \ | |
e32fd6b4 | 59 | strna(_mm->root_container.signature), \ |
e28d0865 | 60 | strna(_mm->error.name), \ |
b56c4604 LP |
61 | strna(_mm->error.message)); \ |
62 | } while (false) | |
f9f97ca6 | 63 | |
e3017af9 | 64 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec); |
8a5cd31e LP |
65 | static void bus_detach_io_events(sd_bus *b); |
66 | static void bus_detach_inotify_event(sd_bus *b); | |
e3017af9 | 67 | |
fa2f8973 LP |
68 | static thread_local sd_bus *default_system_bus = NULL; |
69 | static thread_local sd_bus *default_user_bus = NULL; | |
70 | static thread_local sd_bus *default_starter_bus = NULL; | |
71 | ||
45b1f410 NM |
72 | static sd_bus **bus_choose_default(int (**bus_open)(sd_bus **)) { |
73 | const char *e; | |
74 | ||
75 | /* Let's try our best to reuse another cached connection. If | |
76 | * the starter bus type is set, connect via our normal | |
77 | * connection logic, ignoring $DBUS_STARTER_ADDRESS, so that | |
78 | * we can share the connection with the user/system default | |
79 | * bus. */ | |
80 | ||
81 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
82 | if (e) { | |
83 | if (streq(e, "system")) { | |
84 | if (bus_open) | |
85 | *bus_open = sd_bus_open_system; | |
86 | return &default_system_bus; | |
87 | } else if (STR_IN_SET(e, "user", "session")) { | |
88 | if (bus_open) | |
89 | *bus_open = sd_bus_open_user; | |
90 | return &default_user_bus; | |
91 | } | |
92 | } | |
93 | ||
94 | /* No type is specified, so we have not other option than to | |
95 | * use the starter address if it is set. */ | |
96 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
97 | if (e) { | |
98 | if (bus_open) | |
99 | *bus_open = sd_bus_open; | |
100 | return &default_starter_bus; | |
101 | } | |
102 | ||
103 | /* Finally, if nothing is set use the cached connection for | |
104 | * the right scope */ | |
105 | ||
106 | if (cg_pid_get_owner_uid(0, NULL) >= 0) { | |
107 | if (bus_open) | |
108 | *bus_open = sd_bus_open_user; | |
109 | return &default_user_bus; | |
110 | } else { | |
111 | if (bus_open) | |
112 | *bus_open = sd_bus_open_system; | |
113 | return &default_system_bus; | |
114 | } | |
115 | } | |
116 | ||
117 | sd_bus *bus_resolve(sd_bus *bus) { | |
118 | switch ((uintptr_t) bus) { | |
119 | case (uintptr_t) SD_BUS_DEFAULT: | |
120 | return *(bus_choose_default(NULL)); | |
121 | case (uintptr_t) SD_BUS_DEFAULT_USER: | |
122 | return default_user_bus; | |
123 | case (uintptr_t) SD_BUS_DEFAULT_SYSTEM: | |
124 | return default_system_bus; | |
125 | default: | |
126 | return bus; | |
127 | } | |
128 | } | |
129 | ||
8a5cd31e | 130 | void bus_close_io_fds(sd_bus *b) { |
f54514f3 LP |
131 | assert(b); |
132 | ||
8a5cd31e | 133 | bus_detach_io_events(b); |
1e05d493 | 134 | |
0fd8d506 | 135 | if (b->input_fd != b->output_fd) |
03e334a1 | 136 | safe_close(b->output_fd); |
0fd8d506 | 137 | b->output_fd = b->input_fd = safe_close(b->input_fd); |
f54514f3 LP |
138 | } |
139 | ||
8a5cd31e LP |
140 | void bus_close_inotify_fd(sd_bus *b) { |
141 | assert(b); | |
142 | ||
143 | bus_detach_inotify_event(b); | |
144 | ||
145 | b->inotify_fd = safe_close(b->inotify_fd); | |
146 | b->inotify_watches = mfree(b->inotify_watches); | |
147 | b->n_inotify_watches = 0; | |
148 | } | |
149 | ||
0e586eae | 150 | static void bus_reset_queues(sd_bus *b) { |
0e586eae LP |
151 | assert(b); |
152 | ||
f389bf15 LP |
153 | while (b->rqueue_size > 0) |
154 | sd_bus_message_unref(b->rqueue[--b->rqueue_size]); | |
155 | ||
253f96e5 | 156 | b->rqueue = mfree(b->rqueue); |
f389bf15 | 157 | b->rqueue_allocated = 0; |
0e586eae | 158 | |
f389bf15 LP |
159 | while (b->wqueue_size > 0) |
160 | sd_bus_message_unref(b->wqueue[--b->wqueue_size]); | |
0e586eae | 161 | |
253f96e5 | 162 | b->wqueue = mfree(b->wqueue); |
f389bf15 | 163 | b->wqueue_allocated = 0; |
0e586eae LP |
164 | } |
165 | ||
9df088f1 | 166 | static sd_bus* bus_free(sd_bus *b) { |
19befb2d | 167 | sd_bus_slot *s; |
de1c301e LP |
168 | |
169 | assert(b); | |
8f8f05a9 | 170 | assert(!b->track_queue); |
232f3677 | 171 | assert(!b->tracks); |
8f8f05a9 | 172 | |
19befb2d LP |
173 | b->state = BUS_CLOSED; |
174 | ||
40ca29a1 LP |
175 | sd_bus_detach_event(b); |
176 | ||
19befb2d LP |
177 | while ((s = b->slots)) { |
178 | /* At this point only floating slots can still be | |
179 | * around, because the non-floating ones keep a | |
180 | * reference to the bus, and we thus couldn't be | |
181 | * destructing right now... We forcibly disconnect the | |
182 | * slots here, so that they still can be referenced by | |
183 | * apps, but are dead. */ | |
184 | ||
185 | assert(s->floating); | |
186 | bus_slot_disconnect(s); | |
187 | sd_bus_slot_unref(s); | |
188 | } | |
189 | ||
f4d140e9 LP |
190 | if (b->default_bus_ptr) |
191 | *b->default_bus_ptr = NULL; | |
192 | ||
8a5cd31e LP |
193 | bus_close_io_fds(b); |
194 | bus_close_inotify_fd(b); | |
de1c301e | 195 | |
c4e6556c | 196 | free(b->label); |
18ac4643 | 197 | free(b->groups); |
de1c301e | 198 | free(b->rbuffer); |
89ffcd2a | 199 | free(b->unique_name); |
2181a7f5 | 200 | free(b->auth_buffer); |
89ffcd2a | 201 | free(b->address); |
a7893c6b | 202 | free(b->machine); |
751bc6ac | 203 | free(b->cgroup_root); |
455971c1 | 204 | free(b->description); |
48ef41a3 | 205 | free(b->patch_sender); |
89ffcd2a | 206 | |
2fd9ae2e LP |
207 | free(b->exec_path); |
208 | strv_free(b->exec_argv); | |
209 | ||
2c93b4ef LP |
210 | close_many(b->fds, b->n_fds); |
211 | free(b->fds); | |
212 | ||
0e586eae | 213 | bus_reset_queues(b); |
de1c301e | 214 | |
c9fe4af7 | 215 | ordered_hashmap_free_free(b->reply_callbacks); |
e3017af9 | 216 | prioq_free(b->reply_callbacks_prioq); |
de1c301e | 217 | |
75a0da95 | 218 | assert(b->match_callbacks.type == BUS_MATCH_ROOT); |
392d5b37 LP |
219 | bus_match_free(&b->match_callbacks); |
220 | ||
29ddb38f LP |
221 | hashmap_free_free(b->vtable_methods); |
222 | hashmap_free_free(b->vtable_properties); | |
223 | ||
19befb2d | 224 | assert(hashmap_isempty(b->nodes)); |
29ddb38f LP |
225 | hashmap_free(b->nodes); |
226 | ||
a132bef0 | 227 | bus_flush_memfd(b); |
bc7fd8cd | 228 | |
45fbe937 LP |
229 | assert_se(pthread_mutex_destroy(&b->memfd_cache_mutex) == 0); |
230 | ||
9df088f1 | 231 | return mfree(b); |
de1c301e LP |
232 | } |
233 | ||
9df088f1 ZJS |
234 | DEFINE_TRIVIAL_CLEANUP_FUNC(sd_bus*, bus_free); |
235 | ||
d9f644e2 | 236 | _public_ int sd_bus_new(sd_bus **ret) { |
01c4dcaf | 237 | _cleanup_free_ sd_bus *b = NULL; |
de1c301e | 238 | |
d6888822 | 239 | assert_return(ret, -EINVAL); |
021a1e78 | 240 | |
01c4dcaf ZJS |
241 | b = new0(sd_bus, 1); |
242 | if (!b) | |
021a1e78 | 243 | return -ENOMEM; |
de1c301e | 244 | |
01c4dcaf ZJS |
245 | b->n_ref = REFCNT_INIT; |
246 | b->input_fd = b->output_fd = -1; | |
247 | b->inotify_fd = -1; | |
248 | b->message_version = 1; | |
249 | b->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; | |
250 | b->accept_fd = true; | |
251 | b->original_pid = getpid_cached(); | |
252 | b->n_groups = (size_t) -1; | |
253 | ||
254 | assert_se(pthread_mutex_init(&b->memfd_cache_mutex, NULL) == 0); | |
255 | ||
256 | /* We guarantee that wqueue always has space for at least one entry */ | |
257 | if (!GREEDY_REALLOC(b->wqueue, b->wqueue_allocated, 1)) | |
021a1e78 | 258 | return -ENOMEM; |
de1c301e | 259 | |
01c4dcaf | 260 | *ret = TAKE_PTR(b); |
021a1e78 LP |
261 | return 0; |
262 | } | |
263 | ||
d9f644e2 | 264 | _public_ int sd_bus_set_address(sd_bus *bus, const char *address) { |
021a1e78 LP |
265 | char *a; |
266 | ||
d6888822 | 267 | assert_return(bus, -EINVAL); |
45b1f410 | 268 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
269 | assert_return(bus->state == BUS_UNSET, -EPERM); |
270 | assert_return(address, -EINVAL); | |
271 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 LP |
272 | |
273 | a = strdup(address); | |
274 | if (!a) | |
275 | return -ENOMEM; | |
276 | ||
0639f135 | 277 | return free_and_replace(bus->address, a); |
021a1e78 LP |
278 | } |
279 | ||
d9f644e2 | 280 | _public_ int sd_bus_set_fd(sd_bus *bus, int input_fd, int output_fd) { |
d6888822 | 281 | assert_return(bus, -EINVAL); |
45b1f410 | 282 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 283 | assert_return(bus->state == BUS_UNSET, -EPERM); |
8ac43fee LP |
284 | assert_return(input_fd >= 0, -EBADF); |
285 | assert_return(output_fd >= 0, -EBADF); | |
d6888822 | 286 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 287 | |
e82c9509 LP |
288 | bus->input_fd = input_fd; |
289 | bus->output_fd = output_fd; | |
021a1e78 LP |
290 | return 0; |
291 | } | |
292 | ||
d9f644e2 | 293 | _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[]) { |
01c4dcaf ZJS |
294 | _cleanup_free_ char *p = NULL; |
295 | char **a; | |
2fd9ae2e | 296 | |
d6888822 | 297 | assert_return(bus, -EINVAL); |
45b1f410 | 298 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
299 | assert_return(bus->state == BUS_UNSET, -EPERM); |
300 | assert_return(path, -EINVAL); | |
301 | assert_return(!strv_isempty(argv), -EINVAL); | |
302 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2fd9ae2e LP |
303 | |
304 | p = strdup(path); | |
305 | if (!p) | |
306 | return -ENOMEM; | |
307 | ||
308 | a = strv_copy(argv); | |
01c4dcaf | 309 | if (!a) |
2fd9ae2e | 310 | return -ENOMEM; |
2fd9ae2e | 311 | |
cad4fb19 | 312 | free_and_replace(bus->exec_path, p); |
130d3d22 | 313 | strv_free_and_replace(bus->exec_argv, a); |
2fd9ae2e LP |
314 | return 0; |
315 | } | |
316 | ||
d9f644e2 | 317 | _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) { |
d6888822 | 318 | assert_return(bus, -EINVAL); |
45b1f410 | 319 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 320 | assert_return(bus->state == BUS_UNSET, -EPERM); |
48ef41a3 | 321 | assert_return(!bus->patch_sender, -EPERM); |
d6888822 | 322 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 323 | |
94bbf1ba | 324 | bus->bus_client = !!b; |
021a1e78 LP |
325 | return 0; |
326 | } | |
327 | ||
09365592 LP |
328 | _public_ int sd_bus_set_monitor(sd_bus *bus, int b) { |
329 | assert_return(bus, -EINVAL); | |
45b1f410 | 330 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
09365592 LP |
331 | assert_return(bus->state == BUS_UNSET, -EPERM); |
332 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
333 | ||
e5c8029e | 334 | bus->is_monitor = !!b; |
09365592 LP |
335 | return 0; |
336 | } | |
337 | ||
d9f644e2 | 338 | _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) { |
d6888822 | 339 | assert_return(bus, -EINVAL); |
45b1f410 | 340 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
341 | assert_return(bus->state == BUS_UNSET, -EPERM); |
342 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 343 | |
e5c8029e | 344 | bus->accept_fd = !!b; |
264ad849 LP |
345 | return 0; |
346 | } | |
347 | ||
4fc31988 | 348 | _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) { |
16be4368 | 349 | assert_return(bus, -EINVAL); |
45b1f410 | 350 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
b5dae4c7 | 351 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
352 | assert_return(!bus_pid_changed(bus), -ECHILD); |
353 | ||
c7db1984 LP |
354 | /* This is not actually supported by any of our transports these days, but we do honour it for synthetic |
355 | * replies, and maybe one day classic D-Bus learns this too */ | |
e5c8029e | 356 | bus->attach_timestamp = !!b; |
b5dae4c7 | 357 | |
16be4368 KS |
358 | return 0; |
359 | } | |
360 | ||
b5dae4c7 | 361 | _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) { |
16be4368 | 362 | assert_return(bus, -EINVAL); |
45b1f410 | 363 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
95c4fe82 | 364 | assert_return(mask <= _SD_BUS_CREDS_ALL, -EINVAL); |
b5dae4c7 | 365 | assert_return(!IN_SET(bus->state, BUS_CLOSING, BUS_CLOSED), -EPERM); |
16be4368 KS |
366 | assert_return(!bus_pid_changed(bus), -ECHILD); |
367 | ||
5883ff60 | 368 | SET_FLAG(bus->creds_mask, mask, b); |
b5dae4c7 | 369 | |
49b832c5 | 370 | /* The well knowns we need unconditionally, so that matches can work */ |
b5dae4c7 LP |
371 | bus->creds_mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES|SD_BUS_CREDS_UNIQUE_NAME; |
372 | ||
b5dae4c7 | 373 | return 0; |
021a1e78 | 374 | } |
de1c301e | 375 | |
d9f644e2 | 376 | _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) { |
d6888822 | 377 | assert_return(bus, -EINVAL); |
45b1f410 | 378 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
379 | assert_return(b || sd_id128_equal(server_id, SD_ID128_NULL), -EINVAL); |
380 | assert_return(bus->state == BUS_UNSET, -EPERM); | |
381 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
382 | |
383 | bus->is_server = !!b; | |
98178d39 | 384 | bus->server_id = server_id; |
2181a7f5 LP |
385 | return 0; |
386 | } | |
387 | ||
d9f644e2 | 388 | _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) { |
d6888822 | 389 | assert_return(bus, -EINVAL); |
45b1f410 | 390 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
391 | assert_return(bus->state == BUS_UNSET, -EPERM); |
392 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2181a7f5 LP |
393 | |
394 | bus->anonymous_auth = !!b; | |
395 | return 0; | |
396 | } | |
397 | ||
adacb957 LP |
398 | _public_ int sd_bus_set_trusted(sd_bus *bus, int b) { |
399 | assert_return(bus, -EINVAL); | |
45b1f410 | 400 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
adacb957 LP |
401 | assert_return(bus->state == BUS_UNSET, -EPERM); |
402 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
403 | ||
404 | bus->trusted = !!b; | |
405 | return 0; | |
406 | } | |
407 | ||
455971c1 | 408 | _public_ int sd_bus_set_description(sd_bus *bus, const char *description) { |
5972fe95 | 409 | assert_return(bus, -EINVAL); |
45b1f410 | 410 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
5972fe95 LP |
411 | assert_return(bus->state == BUS_UNSET, -EPERM); |
412 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
413 | ||
d1b91c99 | 414 | return free_and_strdup(&bus->description, description); |
5972fe95 LP |
415 | } |
416 | ||
c0765ddb LP |
417 | _public_ int sd_bus_set_allow_interactive_authorization(sd_bus *bus, int b) { |
418 | assert_return(bus, -EINVAL); | |
45b1f410 | 419 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
c0765ddb LP |
420 | assert_return(!bus_pid_changed(bus), -ECHILD); |
421 | ||
422 | bus->allow_interactive_authorization = !!b; | |
423 | return 0; | |
424 | } | |
425 | ||
426 | _public_ int sd_bus_get_allow_interactive_authorization(sd_bus *bus) { | |
427 | assert_return(bus, -EINVAL); | |
45b1f410 | 428 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
c0765ddb LP |
429 | assert_return(!bus_pid_changed(bus), -ECHILD); |
430 | ||
431 | return bus->allow_interactive_authorization; | |
432 | } | |
433 | ||
8a5cd31e LP |
434 | _public_ int sd_bus_set_watch_bind(sd_bus *bus, int b) { |
435 | assert_return(bus, -EINVAL); | |
45b1f410 | 436 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
8a5cd31e LP |
437 | assert_return(bus->state == BUS_UNSET, -EPERM); |
438 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
439 | ||
e5c8029e | 440 | bus->watch_bind = !!b; |
8a5cd31e LP |
441 | return 0; |
442 | } | |
443 | ||
444 | _public_ int sd_bus_get_watch_bind(sd_bus *bus) { | |
445 | assert_return(bus, -EINVAL); | |
45b1f410 | 446 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
8a5cd31e LP |
447 | assert_return(!bus_pid_changed(bus), -ECHILD); |
448 | ||
449 | return bus->watch_bind; | |
450 | } | |
451 | ||
b38cc8d5 LP |
452 | _public_ int sd_bus_set_connected_signal(sd_bus *bus, int b) { |
453 | assert_return(bus, -EINVAL); | |
45b1f410 | 454 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
b38cc8d5 LP |
455 | assert_return(bus->state == BUS_UNSET, -EPERM); |
456 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
457 | ||
e5c8029e | 458 | bus->connected_signal = !!b; |
b38cc8d5 LP |
459 | return 0; |
460 | } | |
461 | ||
462 | _public_ int sd_bus_get_connected_signal(sd_bus *bus) { | |
463 | assert_return(bus, -EINVAL); | |
45b1f410 | 464 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
b38cc8d5 LP |
465 | assert_return(!bus_pid_changed(bus), -ECHILD); |
466 | ||
467 | return bus->connected_signal; | |
468 | } | |
469 | ||
470 | static int synthesize_connected_signal(sd_bus *bus) { | |
471 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
472 | int r; | |
473 | ||
474 | assert(bus); | |
475 | ||
476 | /* If enabled, synthesizes a local "Connected" signal mirroring the local "Disconnected" signal. This is called | |
477 | * whenever we fully established a connection, i.e. after the authorization phase, and after receiving the | |
478 | * Hello() reply. Or in other words, whenver we enter BUS_RUNNING state. | |
479 | * | |
480 | * This is useful so that clients can start doing stuff whenver the connection is fully established in a way | |
481 | * that works independently from whether we connected to a full bus or just a direct connection. */ | |
482 | ||
483 | if (!bus->connected_signal) | |
484 | return 0; | |
485 | ||
486 | r = sd_bus_message_new_signal( | |
487 | bus, | |
488 | &m, | |
489 | "/org/freedesktop/DBus/Local", | |
490 | "org.freedesktop.DBus.Local", | |
491 | "Connected"); | |
492 | if (r < 0) | |
493 | return r; | |
494 | ||
495 | bus_message_set_sender_local(bus, m); | |
496 | ||
497 | r = bus_seal_synthetic_message(bus, m); | |
498 | if (r < 0) | |
499 | return r; | |
500 | ||
501 | r = bus_rqueue_make_room(bus); | |
502 | if (r < 0) | |
503 | return r; | |
504 | ||
505 | /* Insert at the very front */ | |
506 | memmove(bus->rqueue + 1, bus->rqueue, sizeof(sd_bus_message*) * bus->rqueue_size); | |
1cc6c93a | 507 | bus->rqueue[0] = TAKE_PTR(m); |
b38cc8d5 LP |
508 | bus->rqueue_size++; |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
3e0e196e LP |
513 | void bus_set_state(sd_bus *bus, enum bus_state state) { |
514 | ||
515 | static const char * const table[_BUS_STATE_MAX] = { | |
516 | [BUS_UNSET] = "UNSET", | |
517 | [BUS_WATCH_BIND] = "WATCH_BIND", | |
518 | [BUS_OPENING] = "OPENING", | |
519 | [BUS_AUTHENTICATING] = "AUTHENTICATING", | |
520 | [BUS_HELLO] = "HELLO", | |
521 | [BUS_RUNNING] = "RUNNING", | |
522 | [BUS_CLOSING] = "CLOSING", | |
523 | [BUS_CLOSED] = "CLOSED", | |
524 | }; | |
525 | ||
526 | assert(bus); | |
527 | assert(state < _BUS_STATE_MAX); | |
528 | ||
529 | if (state == bus->state) | |
530 | return; | |
531 | ||
532 | log_debug("Bus %s: changing state %s → %s", strna(bus->description), table[bus->state], table[state]); | |
533 | bus->state = state; | |
534 | } | |
535 | ||
19070062 | 536 | static int hello_callback(sd_bus_message *reply, void *userdata, sd_bus_error *error) { |
de1c301e | 537 | const char *s; |
b4ca3f45 | 538 | char *t; |
19070062 | 539 | sd_bus *bus; |
de1c301e LP |
540 | int r; |
541 | ||
19070062 LP |
542 | assert(reply); |
543 | bus = reply->bus; | |
de1c301e | 544 | assert(bus); |
945c2931 | 545 | assert(IN_SET(bus->state, BUS_HELLO, BUS_CLOSING)); |
de1c301e | 546 | |
40ca29a1 | 547 | r = sd_bus_message_get_errno(reply); |
40ca29a1 LP |
548 | if (r > 0) |
549 | return -r; | |
eb01ba5d | 550 | |
de1c301e LP |
551 | r = sd_bus_message_read(reply, "s", &s); |
552 | if (r < 0) | |
553 | return r; | |
554 | ||
dafb7591 LP |
555 | if (!service_name_is_valid(s) || s[0] != ':') |
556 | return -EBADMSG; | |
557 | ||
b4ca3f45 YW |
558 | t = strdup(s); |
559 | if (!t) | |
de1c301e LP |
560 | return -ENOMEM; |
561 | ||
b4ca3f45 YW |
562 | free_and_replace(bus->unique_name, t); |
563 | ||
b38cc8d5 | 564 | if (bus->state == BUS_HELLO) { |
3e0e196e | 565 | bus_set_state(bus, BUS_RUNNING); |
dafb7591 | 566 | |
b38cc8d5 LP |
567 | r = synthesize_connected_signal(bus); |
568 | if (r < 0) | |
569 | return r; | |
570 | } | |
571 | ||
de1c301e LP |
572 | return 1; |
573 | } | |
574 | ||
575 | static int bus_send_hello(sd_bus *bus) { | |
4afd3348 | 576 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
de1c301e LP |
577 | int r; |
578 | ||
579 | assert(bus); | |
580 | ||
a132bef0 | 581 | if (!bus->bus_client) |
021a1e78 LP |
582 | return 0; |
583 | ||
de1c301e LP |
584 | r = sd_bus_message_new_method_call( |
585 | bus, | |
151b9b96 | 586 | &m, |
de1c301e | 587 | "org.freedesktop.DBus", |
a7639e37 | 588 | "/org/freedesktop/DBus", |
de1c301e | 589 | "org.freedesktop.DBus", |
151b9b96 | 590 | "Hello"); |
de1c301e LP |
591 | if (r < 0) |
592 | return r; | |
593 | ||
19befb2d | 594 | return sd_bus_call_async(bus, NULL, m, hello_callback, NULL, 0); |
de1c301e LP |
595 | } |
596 | ||
a7e3212d | 597 | int bus_start_running(sd_bus *bus) { |
ac8029fc LP |
598 | struct reply_callback *c; |
599 | Iterator i; | |
600 | usec_t n; | |
b38cc8d5 | 601 | int r; |
ac8029fc | 602 | |
de1c301e | 603 | assert(bus); |
ac8029fc LP |
604 | assert(bus->state < BUS_HELLO); |
605 | ||
606 | /* We start all method call timeouts when we enter BUS_HELLO or BUS_RUNNING mode. At this point let's convert | |
607 | * all relative to absolute timestamps. Note that we do not reshuffle the reply callback priority queue since | |
608 | * adding a fixed value to all entries should not alter the internal order. */ | |
609 | ||
610 | n = now(CLOCK_MONOTONIC); | |
611 | ORDERED_HASHMAP_FOREACH(c, bus->reply_callbacks, i) { | |
612 | if (c->timeout_usec == 0) | |
613 | continue; | |
614 | ||
615 | c->timeout_usec = usec_add(n, c->timeout_usec); | |
616 | } | |
de1c301e | 617 | |
a132bef0 | 618 | if (bus->bus_client) { |
3e0e196e | 619 | bus_set_state(bus, BUS_HELLO); |
e3017af9 | 620 | return 1; |
de1c301e LP |
621 | } |
622 | ||
3e0e196e | 623 | bus_set_state(bus, BUS_RUNNING); |
b38cc8d5 LP |
624 | |
625 | r = synthesize_connected_signal(bus); | |
626 | if (r < 0) | |
627 | return r; | |
628 | ||
e3017af9 | 629 | return 1; |
de1c301e LP |
630 | } |
631 | ||
632 | static int parse_address_key(const char **p, const char *key, char **value) { | |
821e0756 | 633 | size_t l, n = 0, allocated = 0; |
cad4fb19 | 634 | _cleanup_free_ char *r = NULL; |
de1c301e | 635 | const char *a; |
de1c301e LP |
636 | |
637 | assert(p); | |
638 | assert(*p); | |
de1c301e LP |
639 | assert(value); |
640 | ||
2fd9ae2e LP |
641 | if (key) { |
642 | l = strlen(key); | |
643 | if (strncmp(*p, key, l) != 0) | |
644 | return 0; | |
de1c301e | 645 | |
2fd9ae2e LP |
646 | if ((*p)[l] != '=') |
647 | return 0; | |
de1c301e | 648 | |
2fd9ae2e LP |
649 | if (*value) |
650 | return -EINVAL; | |
de1c301e | 651 | |
2fd9ae2e LP |
652 | a = *p + l + 1; |
653 | } else | |
654 | a = *p; | |
655 | ||
945c2931 | 656 | while (!IN_SET(*a, ';', ',', 0)) { |
821e0756 | 657 | char c; |
de1c301e LP |
658 | |
659 | if (*a == '%') { | |
660 | int x, y; | |
661 | ||
662 | x = unhexchar(a[1]); | |
cad4fb19 | 663 | if (x < 0) |
de1c301e | 664 | return x; |
de1c301e LP |
665 | |
666 | y = unhexchar(a[2]); | |
cad4fb19 | 667 | if (y < 0) |
de1c301e | 668 | return y; |
de1c301e | 669 | |
de1c301e | 670 | c = (char) ((x << 4) | y); |
89ffcd2a LP |
671 | a += 3; |
672 | } else { | |
de1c301e | 673 | c = *a; |
89ffcd2a LP |
674 | a++; |
675 | } | |
de1c301e | 676 | |
821e0756 | 677 | if (!GREEDY_REALLOC(r, allocated, n + 2)) |
de1c301e | 678 | return -ENOMEM; |
de1c301e | 679 | |
de1c301e LP |
680 | r[n++] = c; |
681 | } | |
682 | ||
89ffcd2a LP |
683 | if (!r) { |
684 | r = strdup(""); | |
685 | if (!r) | |
686 | return -ENOMEM; | |
687 | } else | |
688 | r[n] = 0; | |
689 | ||
690 | if (*a == ',') | |
691 | a++; | |
692 | ||
de1c301e | 693 | *p = a; |
2fd9ae2e | 694 | |
cad4fb19 | 695 | free_and_replace(*value, r); |
2fd9ae2e | 696 | |
de1c301e LP |
697 | return 1; |
698 | } | |
699 | ||
700 | static void skip_address_key(const char **p) { | |
701 | assert(p); | |
702 | assert(*p); | |
703 | ||
89ffcd2a LP |
704 | *p += strcspn(*p, ","); |
705 | ||
706 | if (**p == ',') | |
313cefa1 | 707 | (*p)++; |
de1c301e LP |
708 | } |
709 | ||
2fd9ae2e LP |
710 | static int parse_unix_address(sd_bus *b, const char **p, char **guid) { |
711 | _cleanup_free_ char *path = NULL, *abstract = NULL; | |
712 | size_t l; | |
de1c301e LP |
713 | int r; |
714 | ||
715 | assert(b); | |
2fd9ae2e LP |
716 | assert(p); |
717 | assert(*p); | |
718 | assert(guid); | |
de1c301e | 719 | |
945c2931 | 720 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
721 | r = parse_address_key(p, "guid", guid); |
722 | if (r < 0) | |
723 | return r; | |
724 | else if (r > 0) | |
725 | continue; | |
de1c301e | 726 | |
2fd9ae2e LP |
727 | r = parse_address_key(p, "path", &path); |
728 | if (r < 0) | |
729 | return r; | |
730 | else if (r > 0) | |
731 | continue; | |
de1c301e | 732 | |
2fd9ae2e LP |
733 | r = parse_address_key(p, "abstract", &abstract); |
734 | if (r < 0) | |
735 | return r; | |
736 | else if (r > 0) | |
737 | continue; | |
de1c301e | 738 | |
2fd9ae2e LP |
739 | skip_address_key(p); |
740 | } | |
de1c301e | 741 | |
2fd9ae2e LP |
742 | if (!path && !abstract) |
743 | return -EINVAL; | |
de1c301e | 744 | |
2fd9ae2e LP |
745 | if (path && abstract) |
746 | return -EINVAL; | |
747 | ||
748 | if (path) { | |
749 | l = strlen(path); | |
750 | if (l > sizeof(b->sockaddr.un.sun_path)) | |
751 | return -E2BIG; | |
de1c301e | 752 | |
2fd9ae2e LP |
753 | b->sockaddr.un.sun_family = AF_UNIX; |
754 | strncpy(b->sockaddr.un.sun_path, path, sizeof(b->sockaddr.un.sun_path)); | |
755 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + l; | |
756 | } else if (abstract) { | |
757 | l = strlen(abstract); | |
758 | if (l > sizeof(b->sockaddr.un.sun_path) - 1) | |
759 | return -E2BIG; | |
760 | ||
761 | b->sockaddr.un.sun_family = AF_UNIX; | |
762 | b->sockaddr.un.sun_path[0] = 0; | |
763 | strncpy(b->sockaddr.un.sun_path+1, abstract, sizeof(b->sockaddr.un.sun_path)-1); | |
764 | b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l; | |
765 | } | |
766 | ||
694859b5 LP |
767 | b->is_local = true; |
768 | ||
2fd9ae2e LP |
769 | return 0; |
770 | } | |
771 | ||
772 | static int parse_tcp_address(sd_bus *b, const char **p, char **guid) { | |
773 | _cleanup_free_ char *host = NULL, *port = NULL, *family = NULL; | |
2fd9ae2e | 774 | int r; |
b92bea5d ZJS |
775 | struct addrinfo *result, hints = { |
776 | .ai_socktype = SOCK_STREAM, | |
777 | .ai_flags = AI_ADDRCONFIG, | |
778 | }; | |
2fd9ae2e LP |
779 | |
780 | assert(b); | |
781 | assert(p); | |
782 | assert(*p); | |
783 | assert(guid); | |
784 | ||
945c2931 | 785 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
786 | r = parse_address_key(p, "guid", guid); |
787 | if (r < 0) | |
788 | return r; | |
789 | else if (r > 0) | |
790 | continue; | |
791 | ||
792 | r = parse_address_key(p, "host", &host); | |
793 | if (r < 0) | |
794 | return r; | |
795 | else if (r > 0) | |
796 | continue; | |
797 | ||
798 | r = parse_address_key(p, "port", &port); | |
799 | if (r < 0) | |
800 | return r; | |
801 | else if (r > 0) | |
802 | continue; | |
803 | ||
804 | r = parse_address_key(p, "family", &family); | |
805 | if (r < 0) | |
806 | return r; | |
807 | else if (r > 0) | |
808 | continue; | |
809 | ||
810 | skip_address_key(p); | |
811 | } | |
812 | ||
813 | if (!host || !port) | |
814 | return -EINVAL; | |
815 | ||
2fd9ae2e LP |
816 | if (family) { |
817 | if (streq(family, "ipv4")) | |
818 | hints.ai_family = AF_INET; | |
819 | else if (streq(family, "ipv6")) | |
820 | hints.ai_family = AF_INET6; | |
821 | else | |
822 | return -EINVAL; | |
823 | } | |
824 | ||
825 | r = getaddrinfo(host, port, &hints, &result); | |
826 | if (r == EAI_SYSTEM) | |
827 | return -errno; | |
828 | else if (r != 0) | |
829 | return -EADDRNOTAVAIL; | |
830 | ||
831 | memcpy(&b->sockaddr, result->ai_addr, result->ai_addrlen); | |
832 | b->sockaddr_size = result->ai_addrlen; | |
833 | ||
834 | freeaddrinfo(result); | |
835 | ||
694859b5 LP |
836 | b->is_local = false; |
837 | ||
2fd9ae2e LP |
838 | return 0; |
839 | } | |
840 | ||
841 | static int parse_exec_address(sd_bus *b, const char **p, char **guid) { | |
842 | char *path = NULL; | |
843 | unsigned n_argv = 0, j; | |
844 | char **argv = NULL; | |
821e0756 | 845 | size_t allocated = 0; |
2fd9ae2e LP |
846 | int r; |
847 | ||
848 | assert(b); | |
849 | assert(p); | |
850 | assert(*p); | |
851 | assert(guid); | |
852 | ||
945c2931 | 853 | while (!IN_SET(**p, 0, ';')) { |
2fd9ae2e LP |
854 | r = parse_address_key(p, "guid", guid); |
855 | if (r < 0) | |
856 | goto fail; | |
857 | else if (r > 0) | |
858 | continue; | |
859 | ||
860 | r = parse_address_key(p, "path", &path); | |
861 | if (r < 0) | |
862 | goto fail; | |
863 | else if (r > 0) | |
864 | continue; | |
865 | ||
866 | if (startswith(*p, "argv")) { | |
867 | unsigned ul; | |
868 | ||
869 | errno = 0; | |
870 | ul = strtoul(*p + 4, (char**) p, 10); | |
8333c77e | 871 | if (errno > 0 || **p != '=' || ul > 256) { |
2fd9ae2e LP |
872 | r = -EINVAL; |
873 | goto fail; | |
874 | } | |
875 | ||
313cefa1 | 876 | (*p)++; |
2fd9ae2e LP |
877 | |
878 | if (ul >= n_argv) { | |
821e0756 | 879 | if (!GREEDY_REALLOC0(argv, allocated, ul + 2)) { |
2fd9ae2e LP |
880 | r = -ENOMEM; |
881 | goto fail; | |
882 | } | |
883 | ||
2fd9ae2e LP |
884 | n_argv = ul + 1; |
885 | } | |
886 | ||
887 | r = parse_address_key(p, NULL, argv + ul); | |
de1c301e | 888 | if (r < 0) |
2fd9ae2e | 889 | goto fail; |
de1c301e | 890 | |
2fd9ae2e | 891 | continue; |
de1c301e LP |
892 | } |
893 | ||
2fd9ae2e LP |
894 | skip_address_key(p); |
895 | } | |
de1c301e | 896 | |
5a0f6033 LP |
897 | if (!path) { |
898 | r = -EINVAL; | |
2fd9ae2e | 899 | goto fail; |
5a0f6033 | 900 | } |
de1c301e | 901 | |
2fd9ae2e LP |
902 | /* Make sure there are no holes in the array, with the |
903 | * exception of argv[0] */ | |
904 | for (j = 1; j < n_argv; j++) | |
905 | if (!argv[j]) { | |
906 | r = -EINVAL; | |
907 | goto fail; | |
908 | } | |
909 | ||
910 | if (argv && argv[0] == NULL) { | |
911 | argv[0] = strdup(path); | |
912 | if (!argv[0]) { | |
913 | r = -ENOMEM; | |
914 | goto fail; | |
915 | } | |
916 | } | |
de1c301e | 917 | |
2fd9ae2e LP |
918 | b->exec_path = path; |
919 | b->exec_argv = argv; | |
694859b5 LP |
920 | |
921 | b->is_local = false; | |
922 | ||
2fd9ae2e | 923 | return 0; |
de1c301e | 924 | |
2fd9ae2e LP |
925 | fail: |
926 | for (j = 0; j < n_argv; j++) | |
927 | free(argv[j]); | |
928 | ||
929 | free(argv); | |
930 | free(path); | |
931 | return r; | |
932 | } | |
933 | ||
bc9fd78c | 934 | static int parse_container_unix_address(sd_bus *b, const char **p, char **guid) { |
ee502e0c | 935 | _cleanup_free_ char *machine = NULL, *pid = NULL; |
a7893c6b LP |
936 | int r; |
937 | ||
938 | assert(b); | |
939 | assert(p); | |
940 | assert(*p); | |
941 | assert(guid); | |
942 | ||
945c2931 | 943 | while (!IN_SET(**p, 0, ';')) { |
a7893c6b LP |
944 | r = parse_address_key(p, "guid", guid); |
945 | if (r < 0) | |
946 | return r; | |
947 | else if (r > 0) | |
948 | continue; | |
949 | ||
950 | r = parse_address_key(p, "machine", &machine); | |
951 | if (r < 0) | |
952 | return r; | |
953 | else if (r > 0) | |
954 | continue; | |
955 | ||
ee502e0c LP |
956 | r = parse_address_key(p, "pid", &pid); |
957 | if (r < 0) | |
958 | return r; | |
959 | else if (r > 0) | |
960 | continue; | |
961 | ||
a7893c6b LP |
962 | skip_address_key(p); |
963 | } | |
964 | ||
ee502e0c | 965 | if (!machine == !pid) |
a7893c6b LP |
966 | return -EINVAL; |
967 | ||
ee502e0c LP |
968 | if (machine) { |
969 | if (!machine_name_is_valid(machine)) | |
970 | return -EINVAL; | |
b6741478 | 971 | |
f9ecfd3b | 972 | free_and_replace(b->machine, machine); |
ee502e0c | 973 | } else { |
a1e58e8e | 974 | b->machine = mfree(b->machine); |
ee502e0c LP |
975 | } |
976 | ||
977 | if (pid) { | |
978 | r = parse_pid(pid, &b->nspid); | |
979 | if (r < 0) | |
980 | return r; | |
981 | } else | |
982 | b->nspid = 0; | |
a7893c6b LP |
983 | |
984 | b->sockaddr.un.sun_family = AF_UNIX; | |
15ca0a42 | 985 | /* Note that we use the old /var/run prefix here, to increase compatibility with really old containers */ |
df1e0204 | 986 | strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path)); |
fc2fffe7 | 987 | b->sockaddr_size = SOCKADDR_UN_LEN(b->sockaddr.un); |
694859b5 | 988 | b->is_local = false; |
a7893c6b LP |
989 | |
990 | return 0; | |
991 | } | |
992 | ||
2fd9ae2e LP |
993 | static void bus_reset_parsed_address(sd_bus *b) { |
994 | assert(b); | |
995 | ||
996 | zero(b->sockaddr); | |
997 | b->sockaddr_size = 0; | |
ba243e51 NK |
998 | b->exec_argv = strv_free(b->exec_argv); |
999 | b->exec_path = mfree(b->exec_path); | |
98178d39 | 1000 | b->server_id = SD_ID128_NULL; |
ba243e51 | 1001 | b->machine = mfree(b->machine); |
ee502e0c | 1002 | b->nspid = 0; |
2fd9ae2e LP |
1003 | } |
1004 | ||
1005 | static int bus_parse_next_address(sd_bus *b) { | |
1006 | _cleanup_free_ char *guid = NULL; | |
1007 | const char *a; | |
1008 | int r; | |
1009 | ||
1010 | assert(b); | |
1011 | ||
1012 | if (!b->address) | |
1013 | return 0; | |
1014 | if (b->address[b->address_index] == 0) | |
1015 | return 0; | |
1016 | ||
1017 | bus_reset_parsed_address(b); | |
1018 | ||
1019 | a = b->address + b->address_index; | |
de1c301e | 1020 | |
2fd9ae2e | 1021 | while (*a != 0) { |
de1c301e | 1022 | |
2fd9ae2e LP |
1023 | if (*a == ';') { |
1024 | a++; | |
1025 | continue; | |
de1c301e LP |
1026 | } |
1027 | ||
2fd9ae2e LP |
1028 | if (startswith(a, "unix:")) { |
1029 | a += 5; | |
de1c301e | 1030 | |
2fd9ae2e | 1031 | r = parse_unix_address(b, &a, &guid); |
de1c301e LP |
1032 | if (r < 0) |
1033 | return r; | |
2fd9ae2e | 1034 | break; |
de1c301e | 1035 | |
2fd9ae2e | 1036 | } else if (startswith(a, "tcp:")) { |
de1c301e | 1037 | |
2fd9ae2e LP |
1038 | a += 4; |
1039 | r = parse_tcp_address(b, &a, &guid); | |
de1c301e LP |
1040 | if (r < 0) |
1041 | return r; | |
de1c301e | 1042 | |
2fd9ae2e LP |
1043 | break; |
1044 | ||
1045 | } else if (startswith(a, "unixexec:")) { | |
1046 | ||
1047 | a += 9; | |
1048 | r = parse_exec_address(b, &a, &guid); | |
de1c301e LP |
1049 | if (r < 0) |
1050 | return r; | |
de1c301e | 1051 | |
2fd9ae2e | 1052 | break; |
de1c301e | 1053 | |
de33fc62 | 1054 | } else if (startswith(a, "x-machine-unix:")) { |
bc9fd78c | 1055 | |
146d4773 | 1056 | a += 15; |
bc9fd78c LP |
1057 | r = parse_container_unix_address(b, &a, &guid); |
1058 | if (r < 0) | |
1059 | return r; | |
1060 | ||
6629161f | 1061 | break; |
de1c301e LP |
1062 | } |
1063 | ||
2fd9ae2e LP |
1064 | a = strchr(a, ';'); |
1065 | if (!a) | |
1066 | return 0; | |
de1c301e LP |
1067 | } |
1068 | ||
1069 | if (guid) { | |
98178d39 | 1070 | r = sd_id128_from_string(guid, &b->server_id); |
de1c301e LP |
1071 | if (r < 0) |
1072 | return r; | |
1073 | } | |
1074 | ||
2fd9ae2e | 1075 | b->address_index = a - b->address; |
de1c301e LP |
1076 | return 1; |
1077 | } | |
1078 | ||
392cf1d0 SL |
1079 | static void bus_kill_exec(sd_bus *bus) { |
1080 | if (pid_is_valid(bus->busexec_pid) > 0) { | |
1081 | sigterm_wait(bus->busexec_pid); | |
1082 | bus->busexec_pid = 0; | |
1083 | } | |
1084 | } | |
1085 | ||
a7e3212d | 1086 | static int bus_start_address(sd_bus *b) { |
2fd9ae2e LP |
1087 | int r; |
1088 | ||
1089 | assert(b); | |
1090 | ||
1091 | for (;;) { | |
8a5cd31e LP |
1092 | bus_close_io_fds(b); |
1093 | bus_close_inotify_fd(b); | |
a7e3212d | 1094 | |
392cf1d0 SL |
1095 | bus_kill_exec(b); |
1096 | ||
a132bef0 ZJS |
1097 | /* If you provide multiple different bus-addresses, we |
1098 | * try all of them in order and use the first one that | |
1099 | * succeeds. */ | |
15442912 | 1100 | |
1e05d493 | 1101 | if (b->exec_path) |
a7893c6b | 1102 | r = bus_socket_exec(b); |
a132bef0 ZJS |
1103 | else if ((b->nspid > 0 || b->machine) && b->sockaddr.sa.sa_family != AF_UNSPEC) |
1104 | r = bus_container_connect_socket(b); | |
a132bef0 ZJS |
1105 | else if (b->sockaddr.sa.sa_family != AF_UNSPEC) |
1106 | r = bus_socket_connect(b); | |
a132bef0 ZJS |
1107 | else |
1108 | goto next; | |
1109 | ||
1110 | if (r >= 0) { | |
8a5cd31e LP |
1111 | int q; |
1112 | ||
1113 | q = bus_attach_io_events(b); | |
1114 | if (q < 0) | |
1115 | return q; | |
1116 | ||
1117 | q = bus_attach_inotify_event(b); | |
1118 | if (q < 0) | |
1119 | return q; | |
1120 | ||
1121 | return r; | |
2fd9ae2e LP |
1122 | } |
1123 | ||
a132bef0 ZJS |
1124 | b->last_connect_error = -r; |
1125 | ||
1126 | next: | |
2fd9ae2e LP |
1127 | r = bus_parse_next_address(b); |
1128 | if (r < 0) | |
1129 | return r; | |
1130 | if (r == 0) | |
a132bef0 | 1131 | return b->last_connect_error > 0 ? -b->last_connect_error : -ECONNREFUSED; |
de1c301e LP |
1132 | } |
1133 | } | |
1134 | ||
a7e3212d LP |
1135 | int bus_next_address(sd_bus *b) { |
1136 | assert(b); | |
1137 | ||
1138 | bus_reset_parsed_address(b); | |
1139 | return bus_start_address(b); | |
1140 | } | |
1141 | ||
021a1e78 | 1142 | static int bus_start_fd(sd_bus *b) { |
6629161f | 1143 | struct stat st; |
021a1e78 LP |
1144 | int r; |
1145 | ||
1146 | assert(b); | |
e82c9509 LP |
1147 | assert(b->input_fd >= 0); |
1148 | assert(b->output_fd >= 0); | |
021a1e78 | 1149 | |
e82c9509 | 1150 | r = fd_nonblock(b->input_fd, true); |
021a1e78 LP |
1151 | if (r < 0) |
1152 | return r; | |
1153 | ||
e82c9509 | 1154 | r = fd_cloexec(b->input_fd, true); |
021a1e78 LP |
1155 | if (r < 0) |
1156 | return r; | |
1157 | ||
e82c9509 LP |
1158 | if (b->input_fd != b->output_fd) { |
1159 | r = fd_nonblock(b->output_fd, true); | |
1160 | if (r < 0) | |
1161 | return r; | |
1162 | ||
1163 | r = fd_cloexec(b->output_fd, true); | |
1164 | if (r < 0) | |
1165 | return r; | |
1166 | } | |
1167 | ||
6629161f LP |
1168 | if (fstat(b->input_fd, &st) < 0) |
1169 | return -errno; | |
1170 | ||
a132bef0 | 1171 | return bus_socket_take_fd(b); |
021a1e78 LP |
1172 | } |
1173 | ||
d9f644e2 | 1174 | _public_ int sd_bus_start(sd_bus *bus) { |
021a1e78 LP |
1175 | int r; |
1176 | ||
d6888822 | 1177 | assert_return(bus, -EINVAL); |
45b1f410 | 1178 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
1179 | assert_return(bus->state == BUS_UNSET, -EPERM); |
1180 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
021a1e78 | 1181 | |
3e0e196e | 1182 | bus_set_state(bus, BUS_OPENING); |
021a1e78 | 1183 | |
2181a7f5 LP |
1184 | if (bus->is_server && bus->bus_client) |
1185 | return -EINVAL; | |
1186 | ||
e82c9509 | 1187 | if (bus->input_fd >= 0) |
021a1e78 | 1188 | r = bus_start_fd(bus); |
a132bef0 | 1189 | else if (bus->address || bus->sockaddr.sa.sa_family != AF_UNSPEC || bus->exec_path || bus->machine) |
a7e3212d | 1190 | r = bus_start_address(bus); |
021a1e78 LP |
1191 | else |
1192 | return -EINVAL; | |
1193 | ||
db9bb83f LP |
1194 | if (r < 0) { |
1195 | sd_bus_close(bus); | |
021a1e78 | 1196 | return r; |
db9bb83f | 1197 | } |
021a1e78 LP |
1198 | |
1199 | return bus_send_hello(bus); | |
1200 | } | |
1201 | ||
56fbd718 | 1202 | _public_ int sd_bus_open_with_description(sd_bus **ret, const char *description) { |
af08d2f9 | 1203 | const char *e; |
9df088f1 | 1204 | _cleanup_(bus_freep) sd_bus *b = NULL; |
af08d2f9 LP |
1205 | int r; |
1206 | ||
1207 | assert_return(ret, -EINVAL); | |
1208 | ||
1209 | /* Let's connect to the starter bus if it is set, and | |
1210 | * otherwise to the bus that is appropropriate for the scope | |
1211 | * we are running in */ | |
1212 | ||
1213 | e = secure_getenv("DBUS_STARTER_BUS_TYPE"); | |
1214 | if (e) { | |
1215 | if (streq(e, "system")) | |
56fbd718 | 1216 | return sd_bus_open_system_with_description(ret, description); |
09365592 | 1217 | else if (STR_IN_SET(e, "session", "user")) |
56fbd718 | 1218 | return sd_bus_open_user_with_description(ret, description); |
af08d2f9 LP |
1219 | } |
1220 | ||
1221 | e = secure_getenv("DBUS_STARTER_ADDRESS"); | |
1222 | if (!e) { | |
1223 | if (cg_pid_get_owner_uid(0, NULL) >= 0) | |
56fbd718 | 1224 | return sd_bus_open_user_with_description(ret, description); |
af08d2f9 | 1225 | else |
56fbd718 | 1226 | return sd_bus_open_system_with_description(ret, description); |
af08d2f9 LP |
1227 | } |
1228 | ||
1229 | r = sd_bus_new(&b); | |
1230 | if (r < 0) | |
1231 | return r; | |
1232 | ||
1233 | r = sd_bus_set_address(b, e); | |
1234 | if (r < 0) | |
9df088f1 | 1235 | return r; |
af08d2f9 LP |
1236 | |
1237 | b->bus_client = true; | |
1238 | ||
1239 | /* We don't know whether the bus is trusted or not, so better | |
1240 | * be safe, and authenticate everything */ | |
1241 | b->trusted = false; | |
694859b5 | 1242 | b->is_local = false; |
cf226cfc | 1243 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
af08d2f9 LP |
1244 | |
1245 | r = sd_bus_start(b); | |
1246 | if (r < 0) | |
9df088f1 | 1247 | return r; |
af08d2f9 | 1248 | |
9df088f1 | 1249 | *ret = TAKE_PTR(b); |
af08d2f9 | 1250 | return 0; |
af08d2f9 LP |
1251 | } |
1252 | ||
56fbd718 ZJS |
1253 | _public_ int sd_bus_open(sd_bus **ret) { |
1254 | return sd_bus_open_with_description(ret, NULL); | |
1255 | } | |
1256 | ||
09365592 | 1257 | int bus_set_address_system(sd_bus *b) { |
de1c301e | 1258 | const char *e; |
09365592 LP |
1259 | assert(b); |
1260 | ||
1261 | e = secure_getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
1262 | if (e) | |
1263 | return sd_bus_set_address(b, e); | |
1264 | ||
057171ef | 1265 | return sd_bus_set_address(b, DEFAULT_SYSTEM_BUS_ADDRESS); |
09365592 LP |
1266 | } |
1267 | ||
56fbd718 | 1268 | _public_ int sd_bus_open_system_with_description(sd_bus **ret, const char *description) { |
9df088f1 | 1269 | _cleanup_(bus_freep) sd_bus *b = NULL; |
de1c301e LP |
1270 | int r; |
1271 | ||
d6888822 | 1272 | assert_return(ret, -EINVAL); |
de1c301e | 1273 | |
021a1e78 LP |
1274 | r = sd_bus_new(&b); |
1275 | if (r < 0) | |
1276 | return r; | |
1277 | ||
56fbd718 ZJS |
1278 | if (description) { |
1279 | r = sd_bus_set_description(b, description); | |
1280 | if (r < 0) | |
9df088f1 | 1281 | return r; |
56fbd718 ZJS |
1282 | } |
1283 | ||
09365592 | 1284 | r = bus_set_address_system(b); |
e3dd987c | 1285 | if (r < 0) |
9df088f1 | 1286 | return r; |
de1c301e | 1287 | |
94bbf1ba | 1288 | b->bus_client = true; |
5972fe95 | 1289 | b->is_system = true; |
021a1e78 | 1290 | |
adacb957 LP |
1291 | /* Let's do per-method access control on the system bus. We |
1292 | * need the caller's UID and capability set for that. */ | |
1293 | b->trusted = false; | |
cf226cfc | 1294 | b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS; |
694859b5 | 1295 | b->is_local = true; |
adacb957 | 1296 | |
021a1e78 LP |
1297 | r = sd_bus_start(b); |
1298 | if (r < 0) | |
9df088f1 | 1299 | return r; |
de1c301e | 1300 | |
9df088f1 | 1301 | *ret = TAKE_PTR(b); |
de1c301e LP |
1302 | return 0; |
1303 | } | |
1304 | ||
56fbd718 ZJS |
1305 | _public_ int sd_bus_open_system(sd_bus **ret) { |
1306 | return sd_bus_open_system_with_description(ret, NULL); | |
1307 | } | |
1308 | ||
09365592 | 1309 | int bus_set_address_user(sd_bus *b) { |
de1c301e | 1310 | const char *e; |
a132bef0 | 1311 | _cleanup_free_ char *ee = NULL, *s = NULL; |
de1c301e | 1312 | |
09365592 | 1313 | assert(b); |
021a1e78 | 1314 | |
6c03089c | 1315 | e = secure_getenv("DBUS_SESSION_BUS_ADDRESS"); |
09365592 LP |
1316 | if (e) |
1317 | return sd_bus_set_address(b, e); | |
1318 | ||
1319 | e = secure_getenv("XDG_RUNTIME_DIR"); | |
a132bef0 ZJS |
1320 | if (!e) |
1321 | return -ENOENT; | |
e3dd987c | 1322 | |
a132bef0 ZJS |
1323 | ee = bus_address_escape(e); |
1324 | if (!ee) | |
1325 | return -ENOMEM; | |
de1c301e | 1326 | |
15ca0a42 | 1327 | if (asprintf(&s, DEFAULT_USER_BUS_ADDRESS_FMT, ee) < 0) |
09365592 LP |
1328 | return -ENOMEM; |
1329 | ||
ae2a15bc | 1330 | b->address = TAKE_PTR(s); |
a132bef0 | 1331 | |
09365592 LP |
1332 | return 0; |
1333 | } | |
1334 | ||
56fbd718 | 1335 | _public_ int sd_bus_open_user_with_description(sd_bus **ret, const char *description) { |
9df088f1 | 1336 | _cleanup_(bus_freep) sd_bus *b = NULL; |
09365592 LP |
1337 | int r; |
1338 | ||
1339 | assert_return(ret, -EINVAL); | |
1340 | ||
1341 | r = sd_bus_new(&b); | |
1342 | if (r < 0) | |
1343 | return r; | |
1344 | ||
56fbd718 ZJS |
1345 | if (description) { |
1346 | r = sd_bus_set_description(b, description); | |
1347 | if (r < 0) | |
9df088f1 | 1348 | return r; |
56fbd718 ZJS |
1349 | } |
1350 | ||
09365592 LP |
1351 | r = bus_set_address_user(b); |
1352 | if (r < 0) | |
9df088f1 | 1353 | return r; |
09365592 | 1354 | |
94bbf1ba | 1355 | b->bus_client = true; |
5972fe95 | 1356 | b->is_user = true; |
de1c301e | 1357 | |
adacb957 LP |
1358 | /* We don't do any per-method access control on the user |
1359 | * bus. */ | |
1360 | b->trusted = true; | |
694859b5 | 1361 | b->is_local = true; |
adacb957 | 1362 | |
021a1e78 | 1363 | r = sd_bus_start(b); |
2571ead1 | 1364 | if (r < 0) |
9df088f1 | 1365 | return r; |
de1c301e | 1366 | |
9df088f1 | 1367 | *ret = TAKE_PTR(b); |
de1c301e LP |
1368 | return 0; |
1369 | } | |
1370 | ||
56fbd718 ZJS |
1371 | _public_ int sd_bus_open_user(sd_bus **ret) { |
1372 | return sd_bus_open_user_with_description(ret, NULL); | |
1373 | } | |
1374 | ||
09365592 | 1375 | int bus_set_address_system_remote(sd_bus *b, const char *host) { |
0f8bd8de | 1376 | _cleanup_free_ char *e = NULL; |
b4ca3f45 | 1377 | char *m = NULL, *c = NULL, *a; |
0f8bd8de | 1378 | |
09365592 LP |
1379 | assert(b); |
1380 | assert(host); | |
0f8bd8de | 1381 | |
7f0d207d LP |
1382 | /* Let's see if we shall enter some container */ |
1383 | m = strchr(host, ':'); | |
1384 | if (m) { | |
1385 | m++; | |
1386 | ||
1387 | /* Let's make sure this is not a port of some kind, | |
1388 | * and is a valid machine name. */ | |
0639f135 | 1389 | if (!in_charset(m, DIGITS) && machine_name_is_valid(m)) { |
7f0d207d LP |
1390 | char *t; |
1391 | ||
1392 | /* Cut out the host part */ | |
1393 | t = strndupa(host, m - host - 1); | |
1394 | e = bus_address_escape(t); | |
1395 | if (!e) | |
1396 | return -ENOMEM; | |
1397 | ||
58c6e4a2 | 1398 | c = strjoina(",argv5=--machine=", m); |
7f0d207d LP |
1399 | } |
1400 | } | |
1401 | ||
1402 | if (!e) { | |
1403 | e = bus_address_escape(host); | |
1404 | if (!e) | |
1405 | return -ENOMEM; | |
1406 | } | |
0f8bd8de | 1407 | |
b4ca3f45 YW |
1408 | a = strjoin("unixexec:path=ssh,argv1=-xT,argv2=--,argv3=", e, ",argv4=systemd-stdio-bridge", c); |
1409 | if (!a) | |
0f8bd8de | 1410 | return -ENOMEM; |
a7893c6b | 1411 | |
0639f135 ZJS |
1412 | return free_and_replace(b->address, a); |
1413 | } | |
09365592 LP |
1414 | |
1415 | _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) { | |
9df088f1 | 1416 | _cleanup_(bus_freep) sd_bus *b = NULL; |
09365592 LP |
1417 | int r; |
1418 | ||
1419 | assert_return(host, -EINVAL); | |
1420 | assert_return(ret, -EINVAL); | |
1421 | ||
9df088f1 | 1422 | r = sd_bus_new(&b); |
09365592 | 1423 | if (r < 0) |
a7893c6b | 1424 | return r; |
a7893c6b | 1425 | |
9df088f1 | 1426 | r = bus_set_address_system_remote(b, host); |
09365592 | 1427 | if (r < 0) |
9df088f1 | 1428 | return r; |
09365592 | 1429 | |
9df088f1 ZJS |
1430 | b->bus_client = true; |
1431 | b->trusted = false; | |
1432 | b->is_system = true; | |
1433 | b->is_local = false; | |
a7893c6b | 1434 | |
9df088f1 | 1435 | r = sd_bus_start(b); |
09365592 | 1436 | if (r < 0) |
9df088f1 | 1437 | return r; |
a7893c6b | 1438 | |
9df088f1 | 1439 | *ret = TAKE_PTR(b); |
a7893c6b LP |
1440 | return 0; |
1441 | } | |
1442 | ||
de33fc62 | 1443 | int bus_set_address_system_machine(sd_bus *b, const char *machine) { |
a7893c6b | 1444 | _cleanup_free_ char *e = NULL; |
b4ca3f45 | 1445 | char *a; |
a7893c6b | 1446 | |
09365592 LP |
1447 | assert(b); |
1448 | assert(machine); | |
a7893c6b LP |
1449 | |
1450 | e = bus_address_escape(machine); | |
1451 | if (!e) | |
1452 | return -ENOMEM; | |
1453 | ||
b4ca3f45 YW |
1454 | a = strjoin("x-machine-unix:machine=", e); |
1455 | if (!a) | |
a7893c6b | 1456 | return -ENOMEM; |
0f8bd8de | 1457 | |
0639f135 | 1458 | return free_and_replace(b->address, a); |
09365592 LP |
1459 | } |
1460 | ||
de33fc62 | 1461 | _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) { |
9df088f1 | 1462 | _cleanup_(bus_freep) sd_bus *b = NULL; |
09365592 LP |
1463 | int r; |
1464 | ||
1465 | assert_return(machine, -EINVAL); | |
1466 | assert_return(ret, -EINVAL); | |
affcf189 | 1467 | assert_return(machine_name_is_valid(machine), -EINVAL); |
09365592 | 1468 | |
9df088f1 | 1469 | r = sd_bus_new(&b); |
09365592 | 1470 | if (r < 0) |
0f8bd8de | 1471 | return r; |
0f8bd8de | 1472 | |
9df088f1 | 1473 | r = bus_set_address_system_machine(b, machine); |
09365592 | 1474 | if (r < 0) |
9df088f1 | 1475 | return r; |
09365592 | 1476 | |
9df088f1 ZJS |
1477 | b->bus_client = true; |
1478 | b->trusted = false; | |
1479 | b->is_system = true; | |
1480 | b->is_local = false; | |
0f8bd8de | 1481 | |
9df088f1 | 1482 | r = sd_bus_start(b); |
09365592 | 1483 | if (r < 0) |
9df088f1 | 1484 | return r; |
0f8bd8de | 1485 | |
9df088f1 | 1486 | *ret = TAKE_PTR(b); |
0f8bd8de LP |
1487 | return 0; |
1488 | } | |
1489 | ||
d9f644e2 | 1490 | _public_ void sd_bus_close(sd_bus *bus) { |
de1c301e LP |
1491 | if (!bus) |
1492 | return; | |
d5a2b9a6 LP |
1493 | if (bus->state == BUS_CLOSED) |
1494 | return; | |
1495 | if (bus_pid_changed(bus)) | |
f54514f3 LP |
1496 | return; |
1497 | ||
392cf1d0 SL |
1498 | /* Don't leave ssh hanging around */ |
1499 | bus_kill_exec(bus); | |
1500 | ||
3e0e196e | 1501 | bus_set_state(bus, BUS_CLOSED); |
e82c9509 | 1502 | |
40ca29a1 LP |
1503 | sd_bus_detach_event(bus); |
1504 | ||
0e586eae LP |
1505 | /* Drop all queued messages so that they drop references to |
1506 | * the bus object and the bus may be freed */ | |
1507 | bus_reset_queues(bus); | |
1508 | ||
8a5cd31e LP |
1509 | bus_close_io_fds(bus); |
1510 | bus_close_inotify_fd(bus); | |
de1c301e LP |
1511 | } |
1512 | ||
03976f7b | 1513 | _public_ sd_bus* sd_bus_flush_close_unref(sd_bus *bus) { |
03976f7b LP |
1514 | if (!bus) |
1515 | return NULL; | |
1516 | ||
392cf1d0 SL |
1517 | /* Have to do this before flush() to prevent hang */ |
1518 | bus_kill_exec(bus); | |
1519 | ||
03976f7b LP |
1520 | sd_bus_flush(bus); |
1521 | sd_bus_close(bus); | |
1522 | ||
1523 | return sd_bus_unref(bus); | |
1524 | } | |
1525 | ||
98c5bbc8 | 1526 | void bus_enter_closing(sd_bus *bus) { |
718db961 LP |
1527 | assert(bus); |
1528 | ||
8a5cd31e | 1529 | if (!IN_SET(bus->state, BUS_WATCH_BIND, BUS_OPENING, BUS_AUTHENTICATING, BUS_HELLO, BUS_RUNNING)) |
718db961 LP |
1530 | return; |
1531 | ||
3e0e196e | 1532 | bus_set_state(bus, BUS_CLOSING); |
718db961 LP |
1533 | } |
1534 | ||
d9f644e2 | 1535 | _public_ sd_bus *sd_bus_ref(sd_bus *bus) { |
4afd3348 LP |
1536 | if (!bus) |
1537 | return NULL; | |
de1c301e | 1538 | |
e4ee6e5c | 1539 | assert_se(REFCNT_INC(bus->n_ref) >= 2); |
de1c301e | 1540 | |
de1c301e LP |
1541 | return bus; |
1542 | } | |
1543 | ||
d9f644e2 | 1544 | _public_ sd_bus *sd_bus_unref(sd_bus *bus) { |
b7fc42e0 | 1545 | unsigned i; |
5b1bc83f LP |
1546 | |
1547 | if (!bus) | |
1548 | return NULL; | |
de1c301e | 1549 | |
f389bf15 LP |
1550 | i = REFCNT_DEC(bus->n_ref); |
1551 | if (i > 0) | |
1552 | return NULL; | |
1553 | ||
9df088f1 | 1554 | return bus_free(bus); |
de1c301e LP |
1555 | } |
1556 | ||
d9f644e2 | 1557 | _public_ int sd_bus_is_open(sd_bus *bus) { |
d6888822 | 1558 | assert_return(bus, -EINVAL); |
45b1f410 | 1559 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 1560 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 1561 | |
f54514f3 | 1562 | return BUS_IS_OPEN(bus->state); |
e3017af9 LP |
1563 | } |
1564 | ||
bdbc8669 LP |
1565 | _public_ int sd_bus_is_ready(sd_bus *bus) { |
1566 | assert_return(bus, -EINVAL); | |
45b1f410 | 1567 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
bdbc8669 LP |
1568 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1569 | ||
1570 | return bus->state == BUS_RUNNING; | |
1571 | } | |
1572 | ||
d9f644e2 | 1573 | _public_ int sd_bus_can_send(sd_bus *bus, char type) { |
d728d708 LP |
1574 | int r; |
1575 | ||
d6888822 | 1576 | assert_return(bus, -EINVAL); |
45b1f410 | 1577 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
1578 | assert_return(bus->state != BUS_UNSET, -ENOTCONN); |
1579 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 1580 | |
c7db1984 | 1581 | if (bus->is_monitor) |
09365592 LP |
1582 | return 0; |
1583 | ||
d728d708 | 1584 | if (type == SD_BUS_TYPE_UNIX_FD) { |
c7db1984 | 1585 | if (!bus->accept_fd) |
021a1e78 LP |
1586 | return 0; |
1587 | ||
20902f3e | 1588 | r = bus_ensure_running(bus); |
d728d708 LP |
1589 | if (r < 0) |
1590 | return r; | |
de1c301e | 1591 | |
d728d708 LP |
1592 | return bus->can_fds; |
1593 | } | |
1594 | ||
1595 | return bus_type_is_valid(type); | |
de1c301e LP |
1596 | } |
1597 | ||
5c302692 | 1598 | _public_ int sd_bus_get_bus_id(sd_bus *bus, sd_id128_t *id) { |
d728d708 | 1599 | int r; |
de1c301e | 1600 | |
d6888822 | 1601 | assert_return(bus, -EINVAL); |
45b1f410 | 1602 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
f7fce345 | 1603 | assert_return(id, -EINVAL); |
d6888822 | 1604 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 1605 | |
20902f3e | 1606 | r = bus_ensure_running(bus); |
d728d708 LP |
1607 | if (r < 0) |
1608 | return r; | |
de1c301e | 1609 | |
f7fce345 | 1610 | *id = bus->server_id; |
d728d708 | 1611 | return 0; |
de1c301e LP |
1612 | } |
1613 | ||
3df7a7e6 | 1614 | static int bus_seal_message(sd_bus *b, sd_bus_message *m, usec_t timeout) { |
48ef41a3 LP |
1615 | int r; |
1616 | ||
7adc46fc | 1617 | assert(b); |
de1c301e LP |
1618 | assert(m); |
1619 | ||
aea93deb LP |
1620 | if (m->sealed) { |
1621 | /* If we copy the same message to multiple | |
693eb9a2 | 1622 | * destinations, avoid using the same cookie |
aea93deb | 1623 | * numbers. */ |
693eb9a2 | 1624 | b->cookie = MAX(b->cookie, BUS_MESSAGE_COOKIE(m)); |
de1c301e | 1625 | return 0; |
aea93deb | 1626 | } |
de1c301e | 1627 | |
3df7a7e6 LP |
1628 | if (timeout == 0) |
1629 | timeout = BUS_DEFAULT_TIMEOUT; | |
1630 | ||
48ef41a3 LP |
1631 | if (!m->sender && b->patch_sender) { |
1632 | r = sd_bus_message_set_sender(m, b->patch_sender); | |
1633 | if (r < 0) | |
1634 | return r; | |
1635 | } | |
1636 | ||
75bcbcf2 | 1637 | return sd_bus_message_seal(m, ++b->cookie, timeout); |
de1c301e LP |
1638 | } |
1639 | ||
e1c433c6 | 1640 | static int bus_remarshal_message(sd_bus *b, sd_bus_message **m) { |
908b8a42 DH |
1641 | bool remarshal = false; |
1642 | ||
e1c433c6 LP |
1643 | assert(b); |
1644 | ||
908b8a42 DH |
1645 | /* wrong packet version */ |
1646 | if (b->message_version != 0 && b->message_version != (*m)->header->version) | |
1647 | remarshal = true; | |
1648 | ||
1649 | /* wrong packet endianness */ | |
1650 | if (b->message_endian != 0 && b->message_endian != (*m)->header->endian) | |
1651 | remarshal = true; | |
1652 | ||
908b8a42 | 1653 | return remarshal ? bus_message_remarshal(b, m) : 0; |
e1c433c6 LP |
1654 | } |
1655 | ||
7adc46fc LP |
1656 | int bus_seal_synthetic_message(sd_bus *b, sd_bus_message *m) { |
1657 | assert(b); | |
1658 | assert(m); | |
1659 | ||
52cd5877 LP |
1660 | /* Fake some timestamps, if they were requested, and not |
1661 | * already initialized */ | |
c7db1984 | 1662 | if (b->attach_timestamp) { |
52cd5877 LP |
1663 | if (m->realtime <= 0) |
1664 | m->realtime = now(CLOCK_REALTIME); | |
1665 | ||
1666 | if (m->monotonic <= 0) | |
1667 | m->monotonic = now(CLOCK_MONOTONIC); | |
1668 | } | |
1669 | ||
7adc46fc LP |
1670 | /* The bus specification says the serial number cannot be 0, |
1671 | * hence let's fill something in for synthetic messages. Since | |
1672 | * synthetic messages might have a fake sender and we don't | |
1673 | * want to interfere with the real sender's serial numbers we | |
6f285378 | 1674 | * pick a fixed, artificial one. We use (uint32_t) -1 rather |
7adc46fc LP |
1675 | * than (uint64_t) -1 since dbus1 only had 32bit identifiers, |
1676 | * even though kdbus can do 64bit. */ | |
75bcbcf2 | 1677 | return sd_bus_message_seal(m, 0xFFFFFFFFULL, 0); |
7adc46fc LP |
1678 | } |
1679 | ||
66baf8c6 | 1680 | static int bus_write_message(sd_bus *bus, sd_bus_message *m, size_t *idx) { |
2e3db52d LP |
1681 | int r; |
1682 | ||
718db961 | 1683 | assert(bus); |
2e3db52d | 1684 | assert(m); |
718db961 | 1685 | |
a132bef0 | 1686 | r = bus_socket_write_message(bus, m, idx); |
2e3db52d LP |
1687 | if (r <= 0) |
1688 | return r; | |
1689 | ||
a132bef0 | 1690 | if (*idx >= BUS_MESSAGE_SIZE(m)) |
e32fd6b4 | 1691 | 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 |
1692 | bus_message_type_to_string(m->header->type), |
1693 | strna(sd_bus_message_get_sender(m)), | |
1694 | strna(sd_bus_message_get_destination(m)), | |
1695 | strna(sd_bus_message_get_path(m)), | |
1696 | strna(sd_bus_message_get_interface(m)), | |
1697 | strna(sd_bus_message_get_member(m)), | |
42c4ebcb LP |
1698 | BUS_MESSAGE_COOKIE(m), |
1699 | m->reply_cookie, | |
e32fd6b4 | 1700 | strna(m->root_container.signature), |
e28d0865 | 1701 | strna(m->error.name), |
2e3db52d LP |
1702 | strna(m->error.message)); |
1703 | ||
1704 | return r; | |
718db961 LP |
1705 | } |
1706 | ||
de1c301e | 1707 | static int dispatch_wqueue(sd_bus *bus) { |
e3017af9 | 1708 | int r, ret = 0; |
de1c301e LP |
1709 | |
1710 | assert(bus); | |
945c2931 | 1711 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1712 | |
de1c301e LP |
1713 | while (bus->wqueue_size > 0) { |
1714 | ||
66baf8c6 | 1715 | r = bus_write_message(bus, bus->wqueue[0], &bus->windex); |
718db961 | 1716 | if (r < 0) |
de1c301e | 1717 | return r; |
718db961 | 1718 | else if (r == 0) |
e3017af9 LP |
1719 | /* Didn't do anything this time */ |
1720 | return ret; | |
a132bef0 | 1721 | else if (bus->windex >= BUS_MESSAGE_SIZE(bus->wqueue[0])) { |
de1c301e LP |
1722 | /* Fully written. Let's drop the entry from |
1723 | * the queue. | |
1724 | * | |
1725 | * This isn't particularly optimized, but | |
1726 | * well, this is supposed to be our worst-case | |
1727 | * buffer only, and the socket buffer is | |
1728 | * supposed to be our primary buffer, and if | |
1729 | * it got full, then all bets are off | |
1730 | * anyway. */ | |
1731 | ||
313cefa1 | 1732 | bus->wqueue_size--; |
c4e6e242 | 1733 | sd_bus_message_unref(bus->wqueue[0]); |
de1c301e LP |
1734 | memmove(bus->wqueue, bus->wqueue + 1, sizeof(sd_bus_message*) * bus->wqueue_size); |
1735 | bus->windex = 0; | |
1736 | ||
e3017af9 | 1737 | ret = 1; |
de1c301e LP |
1738 | } |
1739 | } | |
1740 | ||
e3017af9 | 1741 | return ret; |
de1c301e LP |
1742 | } |
1743 | ||
766c5809 | 1744 | static int bus_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
7d22c717 LP |
1745 | assert(bus); |
1746 | ||
a132bef0 | 1747 | return bus_socket_read_message(bus); |
7d22c717 LP |
1748 | } |
1749 | ||
7adc46fc | 1750 | int bus_rqueue_make_room(sd_bus *bus) { |
821e0756 | 1751 | assert(bus); |
7d22c717 | 1752 | |
821e0756 | 1753 | if (bus->rqueue_size >= BUS_RQUEUE_MAX) |
7d22c717 LP |
1754 | return -ENOBUFS; |
1755 | ||
821e0756 | 1756 | if (!GREEDY_REALLOC(bus->rqueue, bus->rqueue_allocated, bus->rqueue_size + 1)) |
7d22c717 LP |
1757 | return -ENOMEM; |
1758 | ||
7d22c717 LP |
1759 | return 0; |
1760 | } | |
1761 | ||
766c5809 | 1762 | static int dispatch_rqueue(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **m) { |
e3017af9 | 1763 | int r, ret = 0; |
de1c301e LP |
1764 | |
1765 | assert(bus); | |
1766 | assert(m); | |
945c2931 | 1767 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
de1c301e | 1768 | |
766c5809 LP |
1769 | /* Note that the priority logic is only available on kdbus, |
1770 | * where the rqueue is unused. We check the rqueue here | |
1771 | * anyway, because it's simple... */ | |
1772 | ||
7d22c717 LP |
1773 | for (;;) { |
1774 | if (bus->rqueue_size > 0) { | |
1775 | /* Dispatch a queued message */ | |
de1c301e | 1776 | |
7d22c717 | 1777 | *m = bus->rqueue[0]; |
313cefa1 | 1778 | bus->rqueue_size--; |
7d22c717 LP |
1779 | memmove(bus->rqueue, bus->rqueue + 1, sizeof(sd_bus_message*) * bus->rqueue_size); |
1780 | return 1; | |
1781 | } | |
de1c301e | 1782 | |
7d22c717 | 1783 | /* Try to read a new message */ |
766c5809 | 1784 | r = bus_read_message(bus, hint_priority, priority); |
718db961 | 1785 | if (r < 0) |
e3017af9 | 1786 | return r; |
e3017af9 LP |
1787 | if (r == 0) |
1788 | return ret; | |
de1c301e | 1789 | |
2e8d788c | 1790 | ret = 1; |
7d22c717 | 1791 | } |
de1c301e LP |
1792 | } |
1793 | ||
66baf8c6 | 1794 | _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie) { |
4afd3348 | 1795 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e LP |
1796 | int r; |
1797 | ||
d6888822 | 1798 | assert_return(m, -EINVAL); |
9030ca46 LP |
1799 | |
1800 | if (!bus) | |
1801 | bus = m->bus; | |
1802 | ||
d6888822 | 1803 | assert_return(!bus_pid_changed(bus), -ECHILD); |
021a1e78 | 1804 | |
a3d59cd1 LP |
1805 | if (!BUS_IS_OPEN(bus->state)) |
1806 | return -ENOTCONN; | |
1807 | ||
021a1e78 LP |
1808 | if (m->n_fds > 0) { |
1809 | r = sd_bus_can_send(bus, SD_BUS_TYPE_UNIX_FD); | |
1810 | if (r < 0) | |
1811 | return r; | |
1812 | if (r == 0) | |
15411c0c | 1813 | return -EOPNOTSUPP; |
021a1e78 | 1814 | } |
de1c301e | 1815 | |
693eb9a2 | 1816 | /* If the cookie number isn't kept, then we know that no reply |
29f6aadd | 1817 | * is expected */ |
693eb9a2 | 1818 | if (!cookie && !m->sealed) |
0461f8cd | 1819 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; |
29f6aadd | 1820 | |
3df7a7e6 | 1821 | r = bus_seal_message(bus, m, 0); |
de1c301e LP |
1822 | if (r < 0) |
1823 | return r; | |
1824 | ||
441d56a1 | 1825 | /* Remarshall if we have to. This will possibly unref the |
e1c433c6 LP |
1826 | * message and place a replacement in m */ |
1827 | r = bus_remarshal_message(bus, &m); | |
1828 | if (r < 0) | |
1829 | return r; | |
1830 | ||
5407f2de LP |
1831 | /* If this is a reply and no reply was requested, then let's |
1832 | * suppress this, if we can */ | |
997eadb5 LP |
1833 | if (m->dont_send) |
1834 | goto finish; | |
5407f2de | 1835 | |
945c2931 | 1836 | if (IN_SET(bus->state, BUS_RUNNING, BUS_HELLO) && bus->wqueue_size <= 0) { |
de1c301e LP |
1837 | size_t idx = 0; |
1838 | ||
66baf8c6 | 1839 | r = bus_write_message(bus, m, &idx); |
32f46480 | 1840 | if (r < 0) { |
103a5027 | 1841 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 1842 | bus_enter_closing(bus); |
441d56a1 LP |
1843 | return -ECONNRESET; |
1844 | } | |
32f46480 | 1845 | |
de1c301e | 1846 | return r; |
997eadb5 LP |
1847 | } |
1848 | ||
a132bef0 | 1849 | if (idx < BUS_MESSAGE_SIZE(m)) { |
de1c301e LP |
1850 | /* Wasn't fully written. So let's remember how |
1851 | * much was written. Note that the first entry | |
1852 | * of the wqueue array is always allocated so | |
1853 | * that we always can remember how much was | |
1854 | * written. */ | |
1855 | bus->wqueue[0] = sd_bus_message_ref(m); | |
1856 | bus->wqueue_size = 1; | |
1857 | bus->windex = idx; | |
1858 | } | |
997eadb5 | 1859 | |
de1c301e | 1860 | } else { |
de1c301e LP |
1861 | /* Just append it to the queue. */ |
1862 | ||
25220239 | 1863 | if (bus->wqueue_size >= BUS_WQUEUE_MAX) |
de1c301e LP |
1864 | return -ENOBUFS; |
1865 | ||
821e0756 | 1866 | if (!GREEDY_REALLOC(bus->wqueue, bus->wqueue_allocated, bus->wqueue_size + 1)) |
de1c301e LP |
1867 | return -ENOMEM; |
1868 | ||
313cefa1 | 1869 | bus->wqueue[bus->wqueue_size++] = sd_bus_message_ref(m); |
de1c301e LP |
1870 | } |
1871 | ||
997eadb5 | 1872 | finish: |
693eb9a2 LP |
1873 | if (cookie) |
1874 | *cookie = BUS_MESSAGE_COOKIE(m); | |
de1c301e | 1875 | |
7a37d625 | 1876 | return 1; |
de1c301e LP |
1877 | } |
1878 | ||
693eb9a2 | 1879 | _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destination, uint64_t *cookie) { |
911121a7 LP |
1880 | int r; |
1881 | ||
911121a7 | 1882 | assert_return(m, -EINVAL); |
9030ca46 LP |
1883 | |
1884 | if (!bus) | |
1885 | bus = m->bus; | |
1886 | ||
911121a7 LP |
1887 | assert_return(!bus_pid_changed(bus), -ECHILD); |
1888 | ||
a3d59cd1 LP |
1889 | if (!BUS_IS_OPEN(bus->state)) |
1890 | return -ENOTCONN; | |
1891 | ||
911121a7 LP |
1892 | if (!streq_ptr(m->destination, destination)) { |
1893 | ||
1894 | if (!destination) | |
1895 | return -EEXIST; | |
1896 | ||
1897 | r = sd_bus_message_set_destination(m, destination); | |
1898 | if (r < 0) | |
1899 | return r; | |
1900 | } | |
1901 | ||
693eb9a2 | 1902 | return sd_bus_send(bus, m, cookie); |
911121a7 LP |
1903 | } |
1904 | ||
ac8029fc LP |
1905 | static usec_t calc_elapse(sd_bus *bus, uint64_t usec) { |
1906 | assert(bus); | |
1907 | ||
de1c301e LP |
1908 | if (usec == (uint64_t) -1) |
1909 | return 0; | |
1910 | ||
ac8029fc LP |
1911 | /* We start all timeouts the instant we enter BUS_HELLO/BUS_RUNNING state, so that the don't run in parallel |
1912 | * with any connection setup states. Hence, if a method callback is started earlier than that we just store the | |
1913 | * relative timestamp, and afterwards the absolute one. */ | |
1914 | ||
1915 | if (IN_SET(bus->state, BUS_WATCH_BIND, BUS_OPENING, BUS_AUTHENTICATING)) | |
1916 | return usec; | |
1917 | else | |
1918 | return now(CLOCK_MONOTONIC) + usec; | |
de1c301e LP |
1919 | } |
1920 | ||
e3017af9 LP |
1921 | static int timeout_compare(const void *a, const void *b) { |
1922 | const struct reply_callback *x = a, *y = b; | |
1923 | ||
ac8029fc | 1924 | if (x->timeout_usec != 0 && y->timeout_usec == 0) |
e3017af9 LP |
1925 | return -1; |
1926 | ||
ac8029fc | 1927 | if (x->timeout_usec == 0 && y->timeout_usec != 0) |
e3017af9 LP |
1928 | return 1; |
1929 | ||
ac8029fc | 1930 | if (x->timeout_usec < y->timeout_usec) |
e3017af9 LP |
1931 | return -1; |
1932 | ||
ac8029fc | 1933 | if (x->timeout_usec > y->timeout_usec) |
e3017af9 LP |
1934 | return 1; |
1935 | ||
1936 | return 0; | |
1937 | } | |
1938 | ||
c49b30a2 | 1939 | _public_ int sd_bus_call_async( |
de1c301e | 1940 | sd_bus *bus, |
19befb2d | 1941 | sd_bus_slot **slot, |
e1c433c6 | 1942 | sd_bus_message *_m, |
52f3ba91 | 1943 | sd_bus_message_handler_t callback, |
de1c301e | 1944 | void *userdata, |
19befb2d | 1945 | uint64_t usec) { |
de1c301e | 1946 | |
4afd3348 LP |
1947 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
1948 | _cleanup_(sd_bus_slot_unrefp) sd_bus_slot *s = NULL; | |
de1c301e LP |
1949 | int r; |
1950 | ||
d6888822 | 1951 | assert_return(m, -EINVAL); |
40ca29a1 | 1952 | assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); |
dbc526f0 | 1953 | assert_return(!m->sealed || (!!callback == !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)), -EINVAL); |
9030ca46 LP |
1954 | |
1955 | if (!bus) | |
1956 | bus = m->bus; | |
1957 | ||
d6888822 | 1958 | assert_return(!bus_pid_changed(bus), -ECHILD); |
89ffcd2a | 1959 | |
a3d59cd1 LP |
1960 | if (!BUS_IS_OPEN(bus->state)) |
1961 | return -ENOTCONN; | |
1962 | ||
dbc526f0 LP |
1963 | /* If no callback is specified and there's no interest in a slot, then there's no reason to ask for a reply */ |
1964 | if (!callback && !slot && !m->sealed) | |
1965 | m->header->flags |= BUS_MESSAGE_NO_REPLY_EXPECTED; | |
1966 | ||
c9fe4af7 | 1967 | r = ordered_hashmap_ensure_allocated(&bus->reply_callbacks, &uint64_hash_ops); |
89ffcd2a LP |
1968 | if (r < 0) |
1969 | return r; | |
de1c301e | 1970 | |
3df7a7e6 LP |
1971 | r = prioq_ensure_allocated(&bus->reply_callbacks_prioq, timeout_compare); |
1972 | if (r < 0) | |
1973 | return r; | |
e3017af9 | 1974 | |
3df7a7e6 | 1975 | r = bus_seal_message(bus, m, usec); |
de1c301e LP |
1976 | if (r < 0) |
1977 | return r; | |
1978 | ||
e1c433c6 LP |
1979 | r = bus_remarshal_message(bus, &m); |
1980 | if (r < 0) | |
1981 | return r; | |
1982 | ||
dbc526f0 LP |
1983 | if (slot || callback) { |
1984 | s = bus_slot_allocate(bus, !slot, BUS_REPLY_CALLBACK, sizeof(struct reply_callback), userdata); | |
1985 | if (!s) | |
1986 | return -ENOMEM; | |
de1c301e | 1987 | |
dbc526f0 | 1988 | s->reply_callback.callback = callback; |
de1c301e | 1989 | |
dbc526f0 LP |
1990 | s->reply_callback.cookie = BUS_MESSAGE_COOKIE(m); |
1991 | r = ordered_hashmap_put(bus->reply_callbacks, &s->reply_callback.cookie, &s->reply_callback); | |
e3017af9 | 1992 | if (r < 0) { |
dbc526f0 | 1993 | s->reply_callback.cookie = 0; |
e3017af9 LP |
1994 | return r; |
1995 | } | |
dbc526f0 LP |
1996 | |
1997 | s->reply_callback.timeout_usec = calc_elapse(bus, m->timeout); | |
1998 | if (s->reply_callback.timeout_usec != 0) { | |
1999 | r = prioq_put(bus->reply_callbacks_prioq, &s->reply_callback, &s->reply_callback.prioq_idx); | |
2000 | if (r < 0) { | |
2001 | s->reply_callback.timeout_usec = 0; | |
2002 | return r; | |
2003 | } | |
2004 | } | |
e3017af9 LP |
2005 | } |
2006 | ||
dbc526f0 | 2007 | r = sd_bus_send(bus, m, s ? &s->reply_callback.cookie : NULL); |
19befb2d | 2008 | if (r < 0) |
de1c301e | 2009 | return r; |
de1c301e | 2010 | |
19befb2d LP |
2011 | if (slot) |
2012 | *slot = s; | |
2013 | s = NULL; | |
e3017af9 | 2014 | |
19befb2d | 2015 | return r; |
de1c301e LP |
2016 | } |
2017 | ||
20902f3e | 2018 | int bus_ensure_running(sd_bus *bus) { |
89ffcd2a LP |
2019 | int r; |
2020 | ||
2021 | assert(bus); | |
2022 | ||
945c2931 | 2023 | if (IN_SET(bus->state, BUS_UNSET, BUS_CLOSED, BUS_CLOSING)) |
021a1e78 | 2024 | return -ENOTCONN; |
d728d708 LP |
2025 | if (bus->state == BUS_RUNNING) |
2026 | return 1; | |
89ffcd2a LP |
2027 | |
2028 | for (;;) { | |
2029 | r = sd_bus_process(bus, NULL); | |
2030 | if (r < 0) | |
2031 | return r; | |
d728d708 LP |
2032 | if (bus->state == BUS_RUNNING) |
2033 | return 1; | |
e3017af9 LP |
2034 | if (r > 0) |
2035 | continue; | |
89ffcd2a LP |
2036 | |
2037 | r = sd_bus_wait(bus, (uint64_t) -1); | |
2038 | if (r < 0) | |
2039 | return r; | |
2040 | } | |
2041 | } | |
2042 | ||
97f82db3 | 2043 | _public_ int sd_bus_call( |
de1c301e | 2044 | sd_bus *bus, |
97f82db3 | 2045 | sd_bus_message *_m, |
de1c301e LP |
2046 | uint64_t usec, |
2047 | sd_bus_error *error, | |
2048 | sd_bus_message **reply) { | |
2049 | ||
4afd3348 | 2050 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = sd_bus_message_ref(_m); |
de1c301e | 2051 | usec_t timeout; |
693eb9a2 | 2052 | uint64_t cookie; |
7d22c717 LP |
2053 | unsigned i; |
2054 | int r; | |
de1c301e | 2055 | |
759e02e7 LP |
2056 | bus_assert_return(m, -EINVAL, error); |
2057 | bus_assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL, error); | |
2058 | bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); | |
2059 | bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); | |
9030ca46 LP |
2060 | |
2061 | if (!bus) | |
2062 | bus = m->bus; | |
2063 | ||
759e02e7 | 2064 | bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); |
97f82db3 | 2065 | |
759e02e7 LP |
2066 | if (!BUS_IS_OPEN(bus->state)) { |
2067 | r = -ENOTCONN; | |
2068 | goto fail; | |
2069 | } | |
a3d59cd1 | 2070 | |
97f82db3 KS |
2071 | r = bus_ensure_running(bus); |
2072 | if (r < 0) | |
759e02e7 | 2073 | goto fail; |
97f82db3 | 2074 | |
a43b9ca3 | 2075 | i = bus->rqueue_size; |
97f82db3 KS |
2076 | |
2077 | r = bus_seal_message(bus, m, usec); | |
2078 | if (r < 0) | |
759e02e7 | 2079 | goto fail; |
97f82db3 KS |
2080 | |
2081 | r = bus_remarshal_message(bus, &m); | |
2082 | if (r < 0) | |
759e02e7 | 2083 | goto fail; |
97f82db3 | 2084 | |
66baf8c6 | 2085 | r = sd_bus_send(bus, m, &cookie); |
de1c301e | 2086 | if (r < 0) |
759e02e7 | 2087 | goto fail; |
de1c301e | 2088 | |
ac8029fc | 2089 | timeout = calc_elapse(bus, m->timeout); |
de1c301e LP |
2090 | |
2091 | for (;;) { | |
2092 | usec_t left; | |
de1c301e | 2093 | |
7d22c717 LP |
2094 | while (i < bus->rqueue_size) { |
2095 | sd_bus_message *incoming = NULL; | |
2096 | ||
2097 | incoming = bus->rqueue[i]; | |
89ffcd2a | 2098 | |
693eb9a2 | 2099 | if (incoming->reply_cookie == cookie) { |
de1c301e LP |
2100 | /* Found a match! */ |
2101 | ||
7d22c717 LP |
2102 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2103 | bus->rqueue_size--; | |
f9f97ca6 | 2104 | log_debug_bus_message(incoming); |
7d22c717 | 2105 | |
40ca29a1 | 2106 | if (incoming->header->type == SD_BUS_MESSAGE_METHOD_RETURN) { |
b7f247e0 | 2107 | |
c7db1984 | 2108 | if (incoming->n_fds <= 0 || bus->accept_fd) { |
2ce97e2b LP |
2109 | if (reply) |
2110 | *reply = incoming; | |
2111 | else | |
2112 | sd_bus_message_unref(incoming); | |
2113 | ||
2114 | return 1; | |
2115 | } | |
2116 | ||
2117 | r = sd_bus_error_setf(error, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptors which I couldn't accept. Sorry."); | |
759e02e7 LP |
2118 | sd_bus_message_unref(incoming); |
2119 | return r; | |
b7f247e0 | 2120 | |
759e02e7 | 2121 | } else if (incoming->header->type == SD_BUS_MESSAGE_METHOD_ERROR) { |
de1c301e | 2122 | r = sd_bus_error_copy(error, &incoming->error); |
759e02e7 LP |
2123 | sd_bus_message_unref(incoming); |
2124 | return r; | |
2125 | } else { | |
a43b9ca3 | 2126 | r = -EIO; |
759e02e7 LP |
2127 | goto fail; |
2128 | } | |
a8a07f89 | 2129 | |
693eb9a2 | 2130 | } else if (BUS_MESSAGE_COOKIE(incoming) == cookie && |
a8a07f89 LP |
2131 | bus->unique_name && |
2132 | incoming->sender && | |
2133 | streq(bus->unique_name, incoming->sender)) { | |
2134 | ||
7d22c717 LP |
2135 | memmove(bus->rqueue + i, bus->rqueue + i + 1, sizeof(sd_bus_message*) * (bus->rqueue_size - i - 1)); |
2136 | bus->rqueue_size--; | |
2137 | ||
a8a07f89 LP |
2138 | /* Our own message? Somebody is trying |
2139 | * to send its own client a message, | |
2140 | * let's not dead-lock, let's fail | |
2141 | * immediately. */ | |
2142 | ||
2143 | sd_bus_message_unref(incoming); | |
759e02e7 LP |
2144 | r = -ELOOP; |
2145 | goto fail; | |
de1c301e LP |
2146 | } |
2147 | ||
de1c301e | 2148 | /* Try to read more, right-away */ |
7d22c717 | 2149 | i++; |
de1c301e | 2150 | } |
7d22c717 | 2151 | |
766c5809 | 2152 | r = bus_read_message(bus, false, 0); |
32f46480 | 2153 | if (r < 0) { |
103a5027 | 2154 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2155 | bus_enter_closing(bus); |
759e02e7 | 2156 | r = -ECONNRESET; |
441d56a1 | 2157 | } |
32f46480 | 2158 | |
759e02e7 | 2159 | goto fail; |
32f46480 | 2160 | } |
7d22c717 | 2161 | if (r > 0) |
e3017af9 | 2162 | continue; |
de1c301e LP |
2163 | |
2164 | if (timeout > 0) { | |
2165 | usec_t n; | |
2166 | ||
2167 | n = now(CLOCK_MONOTONIC); | |
759e02e7 LP |
2168 | if (n >= timeout) { |
2169 | r = -ETIMEDOUT; | |
2170 | goto fail; | |
2171 | } | |
de1c301e LP |
2172 | |
2173 | left = timeout - n; | |
2174 | } else | |
2175 | left = (uint64_t) -1; | |
2176 | ||
e3017af9 | 2177 | r = bus_poll(bus, true, left); |
de1c301e | 2178 | if (r < 0) |
759e02e7 LP |
2179 | goto fail; |
2180 | if (r == 0) { | |
2181 | r = -ETIMEDOUT; | |
2182 | goto fail; | |
2183 | } | |
de1c301e LP |
2184 | |
2185 | r = dispatch_wqueue(bus); | |
32f46480 | 2186 | if (r < 0) { |
103a5027 | 2187 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 2188 | bus_enter_closing(bus); |
759e02e7 | 2189 | r = -ECONNRESET; |
441d56a1 | 2190 | } |
32f46480 | 2191 | |
759e02e7 | 2192 | goto fail; |
32f46480 | 2193 | } |
de1c301e | 2194 | } |
759e02e7 LP |
2195 | |
2196 | fail: | |
2197 | return sd_bus_error_set_errno(error, r); | |
de1c301e LP |
2198 | } |
2199 | ||
d9f644e2 | 2200 | _public_ int sd_bus_get_fd(sd_bus *bus) { |
d6888822 LP |
2201 | |
2202 | assert_return(bus, -EINVAL); | |
45b1f410 | 2203 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
2204 | assert_return(bus->input_fd == bus->output_fd, -EPERM); |
2205 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 2206 | |
8a5cd31e LP |
2207 | if (bus->state == BUS_CLOSED) |
2208 | return -ENOTCONN; | |
2209 | ||
2210 | if (bus->inotify_fd >= 0) | |
2211 | return bus->inotify_fd; | |
2212 | ||
2213 | if (bus->input_fd >= 0) | |
2214 | return bus->input_fd; | |
2215 | ||
2216 | return -ENOTCONN; | |
de1c301e LP |
2217 | } |
2218 | ||
d9f644e2 | 2219 | _public_ int sd_bus_get_events(sd_bus *bus) { |
de1c301e LP |
2220 | int flags = 0; |
2221 | ||
d6888822 | 2222 | assert_return(bus, -EINVAL); |
45b1f410 | 2223 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 2224 | assert_return(!bus_pid_changed(bus), -ECHILD); |
de1c301e | 2225 | |
8a5cd31e LP |
2226 | switch (bus->state) { |
2227 | ||
2228 | case BUS_UNSET: | |
2229 | case BUS_CLOSED: | |
a3d59cd1 LP |
2230 | return -ENOTCONN; |
2231 | ||
8a5cd31e LP |
2232 | case BUS_WATCH_BIND: |
2233 | flags |= POLLIN; | |
2234 | break; | |
2235 | ||
2236 | case BUS_OPENING: | |
de1c301e | 2237 | flags |= POLLOUT; |
8a5cd31e | 2238 | break; |
89ffcd2a | 2239 | |
8a5cd31e | 2240 | case BUS_AUTHENTICATING: |
2181a7f5 | 2241 | if (bus_socket_auth_needs_write(bus)) |
89ffcd2a LP |
2242 | flags |= POLLOUT; |
2243 | ||
2244 | flags |= POLLIN; | |
8a5cd31e | 2245 | break; |
89ffcd2a | 2246 | |
8a5cd31e LP |
2247 | case BUS_RUNNING: |
2248 | case BUS_HELLO: | |
de1c301e LP |
2249 | if (bus->rqueue_size <= 0) |
2250 | flags |= POLLIN; | |
2251 | if (bus->wqueue_size > 0) | |
2252 | flags |= POLLOUT; | |
8a5cd31e LP |
2253 | break; |
2254 | ||
2255 | case BUS_CLOSING: | |
2256 | break; | |
2257 | ||
2258 | default: | |
2259 | assert_not_reached("Unknown state"); | |
de1c301e LP |
2260 | } |
2261 | ||
2262 | return flags; | |
2263 | } | |
2264 | ||
d9f644e2 | 2265 | _public_ int sd_bus_get_timeout(sd_bus *bus, uint64_t *timeout_usec) { |
e3017af9 LP |
2266 | struct reply_callback *c; |
2267 | ||
d6888822 | 2268 | assert_return(bus, -EINVAL); |
45b1f410 | 2269 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 2270 | assert_return(timeout_usec, -EINVAL); |
d6888822 | 2271 | assert_return(!bus_pid_changed(bus), -ECHILD); |
e3017af9 | 2272 | |
a3d59cd1 LP |
2273 | if (!BUS_IS_OPEN(bus->state) && bus->state != BUS_CLOSING) |
2274 | return -ENOTCONN; | |
2275 | ||
8f8f05a9 LP |
2276 | if (bus->track_queue) { |
2277 | *timeout_usec = 0; | |
2278 | return 1; | |
2279 | } | |
2280 | ||
8a5cd31e | 2281 | switch (bus->state) { |
718db961 | 2282 | |
8a5cd31e | 2283 | case BUS_AUTHENTICATING: |
e3017af9 LP |
2284 | *timeout_usec = bus->auth_timeout; |
2285 | return 1; | |
e3017af9 | 2286 | |
8a5cd31e LP |
2287 | case BUS_RUNNING: |
2288 | case BUS_HELLO: | |
2289 | if (bus->rqueue_size > 0) { | |
2290 | *timeout_usec = 0; | |
2291 | return 1; | |
2292 | } | |
2293 | ||
2294 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2295 | if (!c) { | |
2296 | *timeout_usec = (uint64_t) -1; | |
2297 | return 0; | |
2298 | } | |
2299 | ||
ac8029fc | 2300 | if (c->timeout_usec == 0) { |
8a5cd31e LP |
2301 | *timeout_usec = (uint64_t) -1; |
2302 | return 0; | |
2303 | } | |
2304 | ||
ac8029fc | 2305 | *timeout_usec = c->timeout_usec; |
8a5cd31e | 2306 | return 1; |
e3017af9 | 2307 | |
8a5cd31e | 2308 | case BUS_CLOSING: |
8efd6381 LP |
2309 | *timeout_usec = 0; |
2310 | return 1; | |
8efd6381 | 2311 | |
8a5cd31e LP |
2312 | case BUS_WATCH_BIND: |
2313 | case BUS_OPENING: | |
adee69fa | 2314 | *timeout_usec = (uint64_t) -1; |
e3017af9 LP |
2315 | return 0; |
2316 | ||
8a5cd31e LP |
2317 | default: |
2318 | assert_not_reached("Unknown or unexpected stat"); | |
19befb2d | 2319 | } |
e3017af9 LP |
2320 | } |
2321 | ||
2322 | static int process_timeout(sd_bus *bus) { | |
4afd3348 LP |
2323 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
2324 | _cleanup_(sd_bus_message_unrefp) sd_bus_message* m = NULL; | |
e3017af9 | 2325 | struct reply_callback *c; |
1b64f838 | 2326 | sd_bus_slot *slot; |
b057498a | 2327 | bool is_hello; |
e3017af9 LP |
2328 | usec_t n; |
2329 | int r; | |
2330 | ||
2331 | assert(bus); | |
ac8029fc | 2332 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
e3017af9 LP |
2333 | |
2334 | c = prioq_peek(bus->reply_callbacks_prioq); | |
2335 | if (!c) | |
2336 | return 0; | |
2337 | ||
2338 | n = now(CLOCK_MONOTONIC); | |
ac8029fc | 2339 | if (c->timeout_usec > n) |
e3017af9 LP |
2340 | return 0; |
2341 | ||
eb01ba5d LP |
2342 | r = bus_message_new_synthetic_error( |
2343 | bus, | |
693eb9a2 | 2344 | c->cookie, |
14c24659 | 2345 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out"), |
eb01ba5d LP |
2346 | &m); |
2347 | if (r < 0) | |
2348 | return r; | |
2349 | ||
7adc46fc | 2350 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2351 | if (r < 0) |
2352 | return r; | |
2353 | ||
e3017af9 | 2354 | assert_se(prioq_pop(bus->reply_callbacks_prioq) == c); |
ac8029fc | 2355 | c->timeout_usec = 0; |
19befb2d | 2356 | |
c9fe4af7 | 2357 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
19befb2d LP |
2358 | c->cookie = 0; |
2359 | ||
1b64f838 | 2360 | slot = container_of(c, sd_bus_slot, reply_callback); |
e3017af9 | 2361 | |
313cefa1 | 2362 | bus->iteration_counter++; |
718db961 | 2363 | |
b057498a LP |
2364 | is_hello = bus->state == BUS_HELLO && c->callback == hello_callback; |
2365 | ||
1b64f838 LP |
2366 | bus->current_message = m; |
2367 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2368 | bus->current_handler = c->callback; |
2369 | bus->current_userdata = slot->userdata; | |
19070062 | 2370 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2371 | bus->current_userdata = NULL; |
2372 | bus->current_handler = NULL; | |
d974ad05 | 2373 | bus->current_slot = NULL; |
19befb2d | 2374 | bus->current_message = NULL; |
718db961 | 2375 | |
1b64f838 LP |
2376 | if (slot->floating) { |
2377 | bus_slot_disconnect(slot); | |
2378 | sd_bus_slot_unref(slot); | |
2379 | } | |
2380 | ||
d974ad05 DH |
2381 | sd_bus_slot_unref(slot); |
2382 | ||
8a5cd31e LP |
2383 | /* When this is the hello message and it timed out, then make sure to propagate the error up, don't just log |
2384 | * and ignore the callback handler's return value. */ | |
b057498a LP |
2385 | if (is_hello) |
2386 | return r; | |
2387 | ||
1b64f838 | 2388 | return bus_maybe_reply_error(m, r, &error_buffer); |
e3017af9 LP |
2389 | } |
2390 | ||
9d373862 LP |
2391 | static int process_hello(sd_bus *bus, sd_bus_message *m) { |
2392 | assert(bus); | |
2393 | assert(m); | |
2394 | ||
2395 | if (bus->state != BUS_HELLO) | |
2396 | return 0; | |
2397 | ||
2398 | /* Let's make sure the first message on the bus is the HELLO | |
2399 | * reply. But note that we don't actually parse the message | |
2181a7f5 LP |
2400 | * here (we leave that to the usual handling), we just verify |
2401 | * we don't let any earlier msg through. */ | |
9d373862 | 2402 | |
945c2931 | 2403 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
9d373862 LP |
2404 | return -EIO; |
2405 | ||
19befb2d | 2406 | if (m->reply_cookie != 1) |
9d373862 LP |
2407 | return -EIO; |
2408 | ||
2409 | return 0; | |
2410 | } | |
2411 | ||
a652755d | 2412 | static int process_reply(sd_bus *bus, sd_bus_message *m) { |
4afd3348 LP |
2413 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *synthetic_reply = NULL; |
2414 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
19befb2d | 2415 | struct reply_callback *c; |
1b64f838 | 2416 | sd_bus_slot *slot; |
b057498a | 2417 | bool is_hello; |
a652755d LP |
2418 | int r; |
2419 | ||
2420 | assert(bus); | |
2421 | assert(m); | |
2422 | ||
945c2931 | 2423 | if (!IN_SET(m->header->type, SD_BUS_MESSAGE_METHOD_RETURN, SD_BUS_MESSAGE_METHOD_ERROR)) |
a652755d LP |
2424 | return 0; |
2425 | ||
09365592 LP |
2426 | if (m->destination && bus->unique_name && !streq_ptr(m->destination, bus->unique_name)) |
2427 | return 0; | |
2428 | ||
c9fe4af7 | 2429 | c = ordered_hashmap_remove(bus->reply_callbacks, &m->reply_cookie); |
a652755d LP |
2430 | if (!c) |
2431 | return 0; | |
2432 | ||
19befb2d | 2433 | c->cookie = 0; |
19befb2d | 2434 | |
1b64f838 | 2435 | slot = container_of(c, sd_bus_slot, reply_callback); |
a652755d | 2436 | |
c7db1984 | 2437 | if (m->n_fds > 0 && !bus->accept_fd) { |
2ce97e2b LP |
2438 | |
2439 | /* If the reply contained a file descriptor which we | |
2440 | * didn't want we pass an error instead. */ | |
2441 | ||
2442 | r = bus_message_new_synthetic_error( | |
2443 | bus, | |
2444 | m->reply_cookie, | |
2445 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Reply message contained file descriptor"), | |
2446 | &synthetic_reply); | |
2447 | if (r < 0) | |
1b64f838 | 2448 | return r; |
2ce97e2b | 2449 | |
52cd5877 LP |
2450 | /* Copy over original timestamp */ |
2451 | synthetic_reply->realtime = m->realtime; | |
2452 | synthetic_reply->monotonic = m->monotonic; | |
2453 | synthetic_reply->seqnum = m->seqnum; | |
2454 | ||
2ce97e2b LP |
2455 | r = bus_seal_synthetic_message(bus, synthetic_reply); |
2456 | if (r < 0) | |
1b64f838 | 2457 | return r; |
2ce97e2b LP |
2458 | |
2459 | m = synthetic_reply; | |
2460 | } else { | |
2461 | r = sd_bus_message_rewind(m, true); | |
2462 | if (r < 0) | |
1b64f838 | 2463 | return r; |
2ce97e2b | 2464 | } |
88fe224c | 2465 | |
ac8029fc | 2466 | if (c->timeout_usec != 0) { |
1b64f838 | 2467 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
ac8029fc | 2468 | c->timeout_usec = 0; |
1b64f838 | 2469 | } |
19befb2d | 2470 | |
b057498a LP |
2471 | is_hello = bus->state == BUS_HELLO && c->callback == hello_callback; |
2472 | ||
1b64f838 | 2473 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
2474 | bus->current_handler = c->callback; |
2475 | bus->current_userdata = slot->userdata; | |
19070062 | 2476 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2477 | bus->current_userdata = NULL; |
2478 | bus->current_handler = NULL; | |
d974ad05 | 2479 | bus->current_slot = NULL; |
a652755d | 2480 | |
19befb2d LP |
2481 | if (slot->floating) { |
2482 | bus_slot_disconnect(slot); | |
2483 | sd_bus_slot_unref(slot); | |
2484 | } | |
2485 | ||
d974ad05 DH |
2486 | sd_bus_slot_unref(slot); |
2487 | ||
8a5cd31e LP |
2488 | /* When this is the hello message and it failed, then make sure to propagate the error up, don't just log and |
2489 | * ignore the callback handler's return value. */ | |
b057498a LP |
2490 | if (is_hello) |
2491 | return r; | |
2492 | ||
1b64f838 | 2493 | return bus_maybe_reply_error(m, r, &error_buffer); |
a652755d LP |
2494 | } |
2495 | ||
2496 | static int process_filter(sd_bus *bus, sd_bus_message *m) { | |
4afd3348 | 2497 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
a652755d LP |
2498 | struct filter_callback *l; |
2499 | int r; | |
2500 | ||
392d5b37 LP |
2501 | assert(bus); |
2502 | assert(m); | |
2503 | ||
7286037f LP |
2504 | do { |
2505 | bus->filter_callbacks_modified = false; | |
2506 | ||
2507 | LIST_FOREACH(callbacks, l, bus->filter_callbacks) { | |
1b64f838 | 2508 | sd_bus_slot *slot; |
7286037f LP |
2509 | |
2510 | if (bus->filter_callbacks_modified) | |
2511 | break; | |
2512 | ||
2513 | /* Don't run this more than once per iteration */ | |
2514 | if (l->last_iteration == bus->iteration_counter) | |
2515 | continue; | |
2516 | ||
2517 | l->last_iteration = bus->iteration_counter; | |
2518 | ||
88fe224c LP |
2519 | r = sd_bus_message_rewind(m, true); |
2520 | if (r < 0) | |
2521 | return r; | |
2522 | ||
1b64f838 LP |
2523 | slot = container_of(l, sd_bus_slot, filter_callback); |
2524 | ||
2525 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
2526 | bus->current_handler = l->callback; |
2527 | bus->current_userdata = slot->userdata; | |
19070062 | 2528 | r = l->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
2529 | bus->current_userdata = NULL; |
2530 | bus->current_handler = NULL; | |
1b64f838 | 2531 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 2532 | |
ebcf1f97 | 2533 | r = bus_maybe_reply_error(m, r, &error_buffer); |
7286037f LP |
2534 | if (r != 0) |
2535 | return r; | |
2536 | ||
2537 | } | |
2538 | ||
2539 | } while (bus->filter_callbacks_modified); | |
a652755d LP |
2540 | |
2541 | return 0; | |
2542 | } | |
2543 | ||
392d5b37 | 2544 | static int process_match(sd_bus *bus, sd_bus_message *m) { |
7286037f LP |
2545 | int r; |
2546 | ||
392d5b37 LP |
2547 | assert(bus); |
2548 | assert(m); | |
2549 | ||
7286037f LP |
2550 | do { |
2551 | bus->match_callbacks_modified = false; | |
2552 | ||
eb01ba5d | 2553 | r = bus_match_run(bus, &bus->match_callbacks, m); |
7286037f LP |
2554 | if (r != 0) |
2555 | return r; | |
2556 | ||
2557 | } while (bus->match_callbacks_modified); | |
2558 | ||
2559 | return 0; | |
392d5b37 LP |
2560 | } |
2561 | ||
b9bf7e2b | 2562 | static int process_builtin(sd_bus *bus, sd_bus_message *m) { |
4afd3348 | 2563 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
b9bf7e2b LP |
2564 | int r; |
2565 | ||
2566 | assert(bus); | |
2567 | assert(m); | |
2568 | ||
c7db1984 | 2569 | if (bus->is_monitor) |
09365592 LP |
2570 | return 0; |
2571 | ||
758bf0c7 LP |
2572 | if (bus->manual_peer_interface) |
2573 | return 0; | |
2574 | ||
40ca29a1 | 2575 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
b9bf7e2b LP |
2576 | return 0; |
2577 | ||
2578 | if (!streq_ptr(m->interface, "org.freedesktop.DBus.Peer")) | |
2579 | return 0; | |
2580 | ||
0461f8cd | 2581 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
b9bf7e2b LP |
2582 | return 1; |
2583 | ||
2584 | if (streq_ptr(m->member, "Ping")) | |
df2d202e | 2585 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2586 | else if (streq_ptr(m->member, "GetMachineId")) { |
2587 | sd_id128_t id; | |
2588 | char sid[33]; | |
2589 | ||
2590 | r = sd_id128_get_machine(&id); | |
2591 | if (r < 0) | |
2592 | return r; | |
2593 | ||
df2d202e | 2594 | r = sd_bus_message_new_method_return(m, &reply); |
b9bf7e2b LP |
2595 | if (r < 0) |
2596 | return r; | |
2597 | ||
2598 | r = sd_bus_message_append(reply, "s", sd_id128_to_string(id, sid)); | |
2599 | } else { | |
29ddb38f | 2600 | r = sd_bus_message_new_method_errorf( |
df2d202e | 2601 | m, &reply, |
40ca29a1 | 2602 | SD_BUS_ERROR_UNKNOWN_METHOD, |
b9bf7e2b | 2603 | "Unknown method '%s' on interface '%s'.", m->member, m->interface); |
b9bf7e2b LP |
2604 | } |
2605 | ||
2606 | if (r < 0) | |
2607 | return r; | |
2608 | ||
2609 | r = sd_bus_send(bus, reply, NULL); | |
2610 | if (r < 0) | |
2611 | return r; | |
2612 | ||
2613 | return 1; | |
2614 | } | |
2615 | ||
2ce97e2b LP |
2616 | static int process_fd_check(sd_bus *bus, sd_bus_message *m) { |
2617 | assert(bus); | |
2618 | assert(m); | |
2619 | ||
2620 | /* If we got a message with a file descriptor which we didn't | |
2621 | * want to accept, then let's drop it. How can this even | |
2622 | * happen? For example, when the kernel queues a message into | |
2623 | * an activatable names's queue which allows fds, and then is | |
2624 | * delivered to us later even though we ourselves did not | |
2625 | * negotiate it. */ | |
2626 | ||
c7db1984 | 2627 | if (bus->is_monitor) |
09365592 LP |
2628 | return 0; |
2629 | ||
2ce97e2b LP |
2630 | if (m->n_fds <= 0) |
2631 | return 0; | |
2632 | ||
c7db1984 | 2633 | if (bus->accept_fd) |
2ce97e2b LP |
2634 | return 0; |
2635 | ||
2636 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) | |
2637 | return 1; /* just eat it up */ | |
2638 | ||
2639 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INCONSISTENT_MESSAGE, "Message contains file descriptors, which I cannot accept. Sorry."); | |
2640 | } | |
2641 | ||
992c052c | 2642 | static int process_message(sd_bus *bus, sd_bus_message *m) { |
e3017af9 LP |
2643 | int r; |
2644 | ||
2645 | assert(bus); | |
992c052c | 2646 | assert(m); |
e3017af9 | 2647 | |
19befb2d | 2648 | bus->current_message = m; |
992c052c | 2649 | bus->iteration_counter++; |
e3017af9 | 2650 | |
f9f97ca6 | 2651 | log_debug_bus_message(m); |
40ca29a1 | 2652 | |
992c052c LP |
2653 | r = process_hello(bus, m); |
2654 | if (r != 0) | |
affff0b6 | 2655 | goto finish; |
a652755d | 2656 | |
992c052c LP |
2657 | r = process_reply(bus, m); |
2658 | if (r != 0) | |
affff0b6 | 2659 | goto finish; |
e3017af9 | 2660 | |
2ce97e2b LP |
2661 | r = process_fd_check(bus, m); |
2662 | if (r != 0) | |
2663 | goto finish; | |
2664 | ||
992c052c LP |
2665 | r = process_filter(bus, m); |
2666 | if (r != 0) | |
affff0b6 | 2667 | goto finish; |
a652755d | 2668 | |
992c052c LP |
2669 | r = process_match(bus, m); |
2670 | if (r != 0) | |
affff0b6 | 2671 | goto finish; |
a652755d | 2672 | |
992c052c LP |
2673 | r = process_builtin(bus, m); |
2674 | if (r != 0) | |
affff0b6 LP |
2675 | goto finish; |
2676 | ||
2677 | r = bus_process_object(bus, m); | |
a652755d | 2678 | |
affff0b6 | 2679 | finish: |
19befb2d | 2680 | bus->current_message = NULL; |
affff0b6 | 2681 | return r; |
29ddb38f | 2682 | } |
88fe224c | 2683 | |
8f8f05a9 LP |
2684 | static int dispatch_track(sd_bus *bus) { |
2685 | assert(bus); | |
2686 | ||
2687 | if (!bus->track_queue) | |
2688 | return 0; | |
2689 | ||
2690 | bus_track_dispatch(bus->track_queue); | |
2691 | return 1; | |
2692 | } | |
2693 | ||
766c5809 | 2694 | static int process_running(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
4afd3348 | 2695 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
29ddb38f | 2696 | int r; |
a652755d | 2697 | |
29ddb38f | 2698 | assert(bus); |
945c2931 | 2699 | assert(IN_SET(bus->state, BUS_RUNNING, BUS_HELLO)); |
7286037f | 2700 | |
992c052c LP |
2701 | r = process_timeout(bus); |
2702 | if (r != 0) | |
2703 | goto null_message; | |
7286037f | 2704 | |
992c052c LP |
2705 | r = dispatch_wqueue(bus); |
2706 | if (r != 0) | |
2707 | goto null_message; | |
7286037f | 2708 | |
8f8f05a9 LP |
2709 | r = dispatch_track(bus); |
2710 | if (r != 0) | |
2711 | goto null_message; | |
2712 | ||
766c5809 | 2713 | r = dispatch_rqueue(bus, hint_priority, priority, &m); |
992c052c LP |
2714 | if (r < 0) |
2715 | return r; | |
2716 | if (!m) | |
2717 | goto null_message; | |
7286037f | 2718 | |
992c052c LP |
2719 | r = process_message(bus, m); |
2720 | if (r != 0) | |
2721 | goto null_message; | |
7286037f | 2722 | |
992c052c LP |
2723 | if (ret) { |
2724 | r = sd_bus_message_rewind(m, true); | |
29ddb38f LP |
2725 | if (r < 0) |
2726 | return r; | |
e3017af9 | 2727 | |
1cc6c93a YW |
2728 | *ret = TAKE_PTR(m); |
2729 | ||
992c052c LP |
2730 | return 1; |
2731 | } | |
a652755d | 2732 | |
40ca29a1 | 2733 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) { |
a652755d | 2734 | |
dc74ce9b LP |
2735 | log_debug("Unprocessed message call sender=%s object=%s interface=%s member=%s", |
2736 | strna(sd_bus_message_get_sender(m)), | |
2737 | strna(sd_bus_message_get_path(m)), | |
2738 | strna(sd_bus_message_get_interface(m)), | |
2739 | strna(sd_bus_message_get_member(m))); | |
2740 | ||
992c052c | 2741 | r = sd_bus_reply_method_errorf( |
df2d202e | 2742 | m, |
40ca29a1 | 2743 | SD_BUS_ERROR_UNKNOWN_OBJECT, |
992c052c | 2744 | "Unknown object '%s'.", m->path); |
29ddb38f LP |
2745 | if (r < 0) |
2746 | return r; | |
2747 | } | |
e3017af9 | 2748 | |
992c052c | 2749 | return 1; |
0a72c2bd | 2750 | |
992c052c LP |
2751 | null_message: |
2752 | if (r >= 0 && ret) | |
2753 | *ret = NULL; | |
0a72c2bd | 2754 | |
992c052c | 2755 | return r; |
29ddb38f | 2756 | } |
0a72c2bd | 2757 | |
fbb4603d LP |
2758 | static int bus_exit_now(sd_bus *bus) { |
2759 | assert(bus); | |
2760 | ||
2761 | /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes | |
2762 | * sd_event_exit(), otherwise invokes libc exit(). */ | |
2763 | ||
2764 | if (bus->exited) /* did we already exit? */ | |
2765 | return 0; | |
2766 | if (!bus->exit_triggered) /* was the exit condition triggered? */ | |
2767 | return 0; | |
2768 | if (!bus->exit_on_disconnect) /* Shall we actually exit on disconnection? */ | |
2769 | return 0; | |
2770 | ||
2771 | bus->exited = true; /* never exit more than once */ | |
2772 | ||
2773 | log_debug("Bus connection disconnected, exiting."); | |
2774 | ||
2775 | if (bus->event) | |
2776 | return sd_event_exit(bus->event, EXIT_FAILURE); | |
2777 | else | |
2778 | exit(EXIT_FAILURE); | |
2779 | ||
2780 | assert_not_reached("exit() didn't exit?"); | |
2781 | } | |
2782 | ||
217fcc7e LP |
2783 | static int process_closing_reply_callback(sd_bus *bus, struct reply_callback *c) { |
2784 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; | |
4afd3348 | 2785 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
217fcc7e | 2786 | sd_bus_slot *slot; |
718db961 LP |
2787 | int r; |
2788 | ||
2789 | assert(bus); | |
217fcc7e | 2790 | assert(c); |
718db961 | 2791 | |
217fcc7e LP |
2792 | r = bus_message_new_synthetic_error( |
2793 | bus, | |
2794 | c->cookie, | |
2795 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Connection terminated"), | |
2796 | &m); | |
2797 | if (r < 0) | |
2798 | return r; | |
ebcf1f97 | 2799 | |
217fcc7e LP |
2800 | r = bus_seal_synthetic_message(bus, m); |
2801 | if (r < 0) | |
2802 | return r; | |
718db961 | 2803 | |
ac8029fc | 2804 | if (c->timeout_usec != 0) { |
217fcc7e | 2805 | prioq_remove(bus->reply_callbacks_prioq, c, &c->prioq_idx); |
ac8029fc | 2806 | c->timeout_usec = 0; |
217fcc7e | 2807 | } |
718db961 | 2808 | |
217fcc7e LP |
2809 | ordered_hashmap_remove(bus->reply_callbacks, &c->cookie); |
2810 | c->cookie = 0; | |
2811 | ||
2812 | slot = container_of(c, sd_bus_slot, reply_callback); | |
718db961 | 2813 | |
217fcc7e | 2814 | bus->iteration_counter++; |
19befb2d | 2815 | |
217fcc7e LP |
2816 | bus->current_message = m; |
2817 | bus->current_slot = sd_bus_slot_ref(slot); | |
2818 | bus->current_handler = c->callback; | |
2819 | bus->current_userdata = slot->userdata; | |
2820 | r = c->callback(m, slot->userdata, &error_buffer); | |
2821 | bus->current_userdata = NULL; | |
2822 | bus->current_handler = NULL; | |
2823 | bus->current_slot = NULL; | |
2824 | bus->current_message = NULL; | |
718db961 | 2825 | |
217fcc7e LP |
2826 | if (slot->floating) { |
2827 | bus_slot_disconnect(slot); | |
2828 | sd_bus_slot_unref(slot); | |
2829 | } | |
718db961 | 2830 | |
217fcc7e | 2831 | sd_bus_slot_unref(slot); |
1b64f838 | 2832 | |
217fcc7e LP |
2833 | return bus_maybe_reply_error(m, r, &error_buffer); |
2834 | } | |
718db961 | 2835 | |
217fcc7e LP |
2836 | static int process_closing(sd_bus *bus, sd_bus_message **ret) { |
2837 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
2838 | struct reply_callback *c; | |
2839 | int r; | |
d974ad05 | 2840 | |
217fcc7e LP |
2841 | assert(bus); |
2842 | assert(bus->state == BUS_CLOSING); | |
2843 | ||
2844 | /* First, fail all outstanding method calls */ | |
2845 | c = ordered_hashmap_first(bus->reply_callbacks); | |
2846 | if (c) | |
2847 | return process_closing_reply_callback(bus, c); | |
718db961 | 2848 | |
232f3677 LP |
2849 | /* Then, fake-drop all remaining bus tracking references */ |
2850 | if (bus->tracks) { | |
2851 | bus_track_close(bus->tracks); | |
2852 | return 1; | |
2853 | } | |
2854 | ||
718db961 LP |
2855 | /* Then, synthesize a Disconnected message */ |
2856 | r = sd_bus_message_new_signal( | |
2857 | bus, | |
151b9b96 | 2858 | &m, |
718db961 LP |
2859 | "/org/freedesktop/DBus/Local", |
2860 | "org.freedesktop.DBus.Local", | |
151b9b96 | 2861 | "Disconnected"); |
718db961 LP |
2862 | if (r < 0) |
2863 | return r; | |
2864 | ||
fb6d9b77 | 2865 | bus_message_set_sender_local(bus, m); |
34a2c9e8 | 2866 | |
7adc46fc | 2867 | r = bus_seal_synthetic_message(bus, m); |
718db961 LP |
2868 | if (r < 0) |
2869 | return r; | |
2870 | ||
2871 | sd_bus_close(bus); | |
2872 | ||
19befb2d | 2873 | bus->current_message = m; |
718db961 LP |
2874 | bus->iteration_counter++; |
2875 | ||
2876 | r = process_filter(bus, m); | |
2877 | if (r != 0) | |
2878 | goto finish; | |
2879 | ||
2880 | r = process_match(bus, m); | |
2881 | if (r != 0) | |
2882 | goto finish; | |
2883 | ||
fbb4603d LP |
2884 | /* Nothing else to do, exit now, if the condition holds */ |
2885 | bus->exit_triggered = true; | |
2886 | (void) bus_exit_now(bus); | |
2887 | ||
1cc6c93a YW |
2888 | if (ret) |
2889 | *ret = TAKE_PTR(m); | |
718db961 LP |
2890 | |
2891 | r = 1; | |
2892 | ||
2893 | finish: | |
19befb2d LP |
2894 | bus->current_message = NULL; |
2895 | ||
718db961 LP |
2896 | return r; |
2897 | } | |
2898 | ||
766c5809 | 2899 | static int bus_process_internal(sd_bus *bus, bool hint_priority, int64_t priority, sd_bus_message **ret) { |
8ce2afd6 | 2900 | BUS_DONT_DESTROY(bus); |
29ddb38f | 2901 | int r; |
0a72c2bd | 2902 | |
992c052c LP |
2903 | /* Returns 0 when we didn't do anything. This should cause the |
2904 | * caller to invoke sd_bus_wait() before returning the next | |
2905 | * time. Returns > 0 when we did something, which possibly | |
2906 | * means *ret is filled in with an unprocessed message. */ | |
0a72c2bd | 2907 | |
d6888822 | 2908 | assert_return(bus, -EINVAL); |
45b1f410 | 2909 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 2910 | assert_return(!bus_pid_changed(bus), -ECHILD); |
0a72c2bd | 2911 | |
992c052c | 2912 | /* We don't allow recursively invoking sd_bus_process(). */ |
19befb2d LP |
2913 | assert_return(!bus->current_message, -EBUSY); |
2914 | assert(!bus->current_slot); | |
0a72c2bd | 2915 | |
992c052c | 2916 | switch (bus->state) { |
0a72c2bd | 2917 | |
992c052c | 2918 | case BUS_UNSET: |
992c052c | 2919 | return -ENOTCONN; |
0a72c2bd | 2920 | |
6d6f4904 LP |
2921 | case BUS_CLOSED: |
2922 | return -ECONNRESET; | |
2923 | ||
8a5cd31e LP |
2924 | case BUS_WATCH_BIND: |
2925 | r = bus_socket_process_watch_bind(bus); | |
2926 | break; | |
2927 | ||
992c052c LP |
2928 | case BUS_OPENING: |
2929 | r = bus_socket_process_opening(bus); | |
8a5cd31e | 2930 | break; |
a652755d | 2931 | |
992c052c | 2932 | case BUS_AUTHENTICATING: |
992c052c | 2933 | r = bus_socket_process_authenticating(bus); |
8a5cd31e | 2934 | break; |
a652755d | 2935 | |
992c052c LP |
2936 | case BUS_RUNNING: |
2937 | case BUS_HELLO: | |
766c5809 | 2938 | r = process_running(bus, hint_priority, priority, ret); |
8a5cd31e LP |
2939 | if (r >= 0) |
2940 | return r; | |
718db961 | 2941 | |
8a5cd31e LP |
2942 | /* This branch initializes *ret, hence we don't use the generic error checking below */ |
2943 | break; | |
718db961 LP |
2944 | |
2945 | case BUS_CLOSING: | |
2946 | return process_closing(bus, ret); | |
8a5cd31e LP |
2947 | |
2948 | default: | |
2949 | assert_not_reached("Unknown state"); | |
992c052c | 2950 | } |
43a43f50 | 2951 | |
8a5cd31e LP |
2952 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
2953 | bus_enter_closing(bus); | |
2954 | r = 1; | |
2955 | } else if (r < 0) | |
2956 | return r; | |
2957 | ||
2958 | if (ret) | |
2959 | *ret = NULL; | |
2960 | ||
2961 | return r; | |
e3017af9 LP |
2962 | } |
2963 | ||
766c5809 LP |
2964 | _public_ int sd_bus_process(sd_bus *bus, sd_bus_message **ret) { |
2965 | return bus_process_internal(bus, false, 0, ret); | |
2966 | } | |
2967 | ||
2968 | _public_ int sd_bus_process_priority(sd_bus *bus, int64_t priority, sd_bus_message **ret) { | |
2969 | return bus_process_internal(bus, true, priority, ret); | |
2970 | } | |
2971 | ||
992c052c LP |
2972 | static int bus_poll(sd_bus *bus, bool need_more, uint64_t timeout_usec) { |
2973 | struct pollfd p[2] = {}; | |
8a5cd31e | 2974 | int r, n; |
992c052c | 2975 | struct timespec ts; |
3a43da28 | 2976 | usec_t m = USEC_INFINITY; |
adcdb374 LP |
2977 | |
2978 | assert(bus); | |
718db961 LP |
2979 | |
2980 | if (bus->state == BUS_CLOSING) | |
2981 | return 1; | |
2982 | ||
a3d59cd1 LP |
2983 | if (!BUS_IS_OPEN(bus->state)) |
2984 | return -ENOTCONN; | |
adcdb374 | 2985 | |
8a5cd31e LP |
2986 | if (bus->state == BUS_WATCH_BIND) { |
2987 | assert(bus->inotify_fd >= 0); | |
adcdb374 | 2988 | |
8a5cd31e LP |
2989 | p[0].events = POLLIN; |
2990 | p[0].fd = bus->inotify_fd; | |
992c052c LP |
2991 | n = 1; |
2992 | } else { | |
8a5cd31e LP |
2993 | int e; |
2994 | ||
2995 | e = sd_bus_get_events(bus); | |
2996 | if (e < 0) | |
2997 | return e; | |
2998 | ||
2999 | if (need_more) | |
3000 | /* The caller really needs some more data, he doesn't | |
3001 | * care about what's already read, or any timeouts | |
3002 | * except its own. */ | |
3003 | e |= POLLIN; | |
3004 | else { | |
3005 | usec_t until; | |
3006 | /* The caller wants to process if there's something to | |
3007 | * process, but doesn't care otherwise */ | |
3008 | ||
3009 | r = sd_bus_get_timeout(bus, &until); | |
3010 | if (r < 0) | |
3011 | return r; | |
3012 | if (r > 0) | |
3013 | m = usec_sub_unsigned(until, now(CLOCK_MONOTONIC)); | |
3014 | } | |
3015 | ||
3016 | p[0].fd = bus->input_fd; | |
3017 | if (bus->output_fd == bus->input_fd) { | |
3018 | p[0].events = e; | |
3019 | n = 1; | |
3020 | } else { | |
3021 | p[0].events = e & POLLIN; | |
3022 | p[1].fd = bus->output_fd; | |
3023 | p[1].events = e & POLLOUT; | |
3024 | n = 2; | |
3025 | } | |
adcdb374 LP |
3026 | } |
3027 | ||
8a5cd31e LP |
3028 | if (timeout_usec != (uint64_t) -1 && (m == USEC_INFINITY || timeout_usec < m)) |
3029 | m = timeout_usec; | |
3030 | ||
3031 | r = ppoll(p, n, m == USEC_INFINITY ? NULL : timespec_store(&ts, m), NULL); | |
adcdb374 | 3032 | if (r < 0) |
992c052c | 3033 | return -errno; |
adcdb374 | 3034 | |
992c052c | 3035 | return r > 0 ? 1 : 0; |
adcdb374 LP |
3036 | } |
3037 | ||
d9f644e2 | 3038 | _public_ int sd_bus_wait(sd_bus *bus, uint64_t timeout_usec) { |
9db76355 | 3039 | |
d6888822 | 3040 | assert_return(bus, -EINVAL); |
45b1f410 | 3041 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 3042 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 3043 | |
718db961 LP |
3044 | if (bus->state == BUS_CLOSING) |
3045 | return 0; | |
3046 | ||
a3d59cd1 LP |
3047 | if (!BUS_IS_OPEN(bus->state)) |
3048 | return -ENOTCONN; | |
718db961 | 3049 | |
992c052c LP |
3050 | if (bus->rqueue_size > 0) |
3051 | return 0; | |
9db76355 | 3052 | |
992c052c LP |
3053 | return bus_poll(bus, false, timeout_usec); |
3054 | } | |
9db76355 | 3055 | |
d9f644e2 | 3056 | _public_ int sd_bus_flush(sd_bus *bus) { |
992c052c | 3057 | int r; |
9db76355 | 3058 | |
d6888822 | 3059 | assert_return(bus, -EINVAL); |
45b1f410 | 3060 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 | 3061 | assert_return(!bus_pid_changed(bus), -ECHILD); |
9db76355 | 3062 | |
718db961 LP |
3063 | if (bus->state == BUS_CLOSING) |
3064 | return 0; | |
3065 | ||
a3d59cd1 LP |
3066 | if (!BUS_IS_OPEN(bus->state)) |
3067 | return -ENOTCONN; | |
718db961 | 3068 | |
8a5cd31e LP |
3069 | /* We never were connected? Don't hang in inotify for good, as there's no timeout set for it */ |
3070 | if (bus->state == BUS_WATCH_BIND) | |
3071 | return -EUNATCH; | |
3072 | ||
992c052c LP |
3073 | r = bus_ensure_running(bus); |
3074 | if (r < 0) | |
3075 | return r; | |
9db76355 | 3076 | |
992c052c LP |
3077 | if (bus->wqueue_size <= 0) |
3078 | return 0; | |
9db76355 | 3079 | |
992c052c LP |
3080 | for (;;) { |
3081 | r = dispatch_wqueue(bus); | |
32f46480 | 3082 | if (r < 0) { |
103a5027 | 3083 | if (IN_SET(r, -ENOTCONN, -ECONNRESET, -EPIPE, -ESHUTDOWN)) { |
32f46480 | 3084 | bus_enter_closing(bus); |
441d56a1 LP |
3085 | return -ECONNRESET; |
3086 | } | |
32f46480 | 3087 | |
9db76355 | 3088 | return r; |
32f46480 | 3089 | } |
9db76355 | 3090 | |
992c052c LP |
3091 | if (bus->wqueue_size <= 0) |
3092 | return 0; | |
9db76355 | 3093 | |
992c052c | 3094 | r = bus_poll(bus, false, (uint64_t) -1); |
9db76355 LP |
3095 | if (r < 0) |
3096 | return r; | |
9db76355 | 3097 | } |
9db76355 LP |
3098 | } |
3099 | ||
19befb2d LP |
3100 | _public_ int sd_bus_add_filter( |
3101 | sd_bus *bus, | |
3102 | sd_bus_slot **slot, | |
3103 | sd_bus_message_handler_t callback, | |
3104 | void *userdata) { | |
d9f644e2 | 3105 | |
19befb2d | 3106 | sd_bus_slot *s; |
de1c301e | 3107 | |
d6888822 | 3108 | assert_return(bus, -EINVAL); |
45b1f410 | 3109 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
3110 | assert_return(callback, -EINVAL); |
3111 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
de1c301e | 3112 | |
19befb2d LP |
3113 | s = bus_slot_allocate(bus, !slot, BUS_FILTER_CALLBACK, sizeof(struct filter_callback), userdata); |
3114 | if (!s) | |
29ddb38f LP |
3115 | return -ENOMEM; |
3116 | ||
19befb2d | 3117 | s->filter_callback.callback = callback; |
a652755d | 3118 | |
19befb2d LP |
3119 | bus->filter_callbacks_modified = true; |
3120 | LIST_PREPEND(callbacks, bus->filter_callbacks, &s->filter_callback); | |
a652755d | 3121 | |
19befb2d LP |
3122 | if (slot) |
3123 | *slot = s; | |
29ddb38f | 3124 | |
992c052c | 3125 | return 0; |
a652755d | 3126 | } |
392d5b37 | 3127 | |
7593c7a4 LP |
3128 | static int add_match_callback( |
3129 | sd_bus_message *m, | |
3130 | void *userdata, | |
3131 | sd_bus_error *ret_error) { | |
3132 | ||
3133 | sd_bus_slot *match_slot = userdata; | |
3134 | bool failed = false; | |
3135 | int r; | |
3136 | ||
3137 | assert(m); | |
3138 | assert(match_slot); | |
3139 | ||
3140 | sd_bus_slot_ref(match_slot); | |
3141 | ||
3142 | if (sd_bus_message_is_method_error(m, NULL)) { | |
3143 | log_debug_errno(sd_bus_message_get_errno(m), | |
3144 | "Unable to add match %s, failing connection: %s", | |
3145 | match_slot->match_callback.match_string, | |
3146 | sd_bus_message_get_error(m)->message); | |
3147 | ||
3148 | failed = true; | |
3149 | } else | |
3150 | log_debug("Match %s successfully installed.", match_slot->match_callback.match_string); | |
3151 | ||
3152 | if (match_slot->match_callback.install_callback) { | |
3153 | sd_bus *bus; | |
3154 | ||
3155 | bus = sd_bus_message_get_bus(m); | |
3156 | ||
3157 | /* This function has been called as slot handler, and we want to call another slot handler. Let's | |
3158 | * update the slot callback metadata temporarily with our own data, and then revert back to the old | |
3159 | * values. */ | |
3160 | ||
3161 | assert(bus->current_slot == match_slot->match_callback.install_slot); | |
3162 | assert(bus->current_handler == add_match_callback); | |
3163 | assert(bus->current_userdata == userdata); | |
3164 | ||
3165 | bus->current_slot = match_slot; | |
3166 | bus->current_handler = match_slot->match_callback.install_callback; | |
3167 | bus->current_userdata = match_slot->userdata; | |
3168 | ||
3169 | r = match_slot->match_callback.install_callback(m, match_slot->userdata, ret_error); | |
3170 | ||
3171 | bus->current_slot = match_slot->match_callback.install_slot; | |
3172 | bus->current_handler = add_match_callback; | |
3173 | bus->current_userdata = userdata; | |
3174 | ||
3175 | match_slot->match_callback.install_slot = sd_bus_slot_unref(match_slot->match_callback.install_slot); | |
3176 | } else { | |
3177 | if (failed) /* Generic failure handling: destroy the connection */ | |
3178 | bus_enter_closing(sd_bus_message_get_bus(m)); | |
3179 | ||
3180 | r = 1; | |
3181 | } | |
3182 | ||
3183 | if (failed && match_slot->floating) { | |
3184 | bus_slot_disconnect(match_slot); | |
3185 | sd_bus_slot_unref(match_slot); | |
3186 | } | |
3187 | ||
3188 | sd_bus_slot_unref(match_slot); | |
3189 | ||
3190 | return r; | |
3191 | } | |
3192 | ||
3193 | static int bus_add_match_full( | |
19befb2d LP |
3194 | sd_bus *bus, |
3195 | sd_bus_slot **slot, | |
7593c7a4 | 3196 | bool asynchronous, |
19befb2d LP |
3197 | const char *match, |
3198 | sd_bus_message_handler_t callback, | |
7593c7a4 | 3199 | sd_bus_message_handler_t install_callback, |
19befb2d | 3200 | void *userdata) { |
d9f644e2 | 3201 | |
992c052c LP |
3202 | struct bus_match_component *components = NULL; |
3203 | unsigned n_components = 0; | |
2915234d | 3204 | sd_bus_slot *s = NULL; |
992c052c | 3205 | int r = 0; |
392d5b37 | 3206 | |
d6888822 | 3207 | assert_return(bus, -EINVAL); |
45b1f410 | 3208 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d6888822 LP |
3209 | assert_return(match, -EINVAL); |
3210 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
392d5b37 | 3211 | |
992c052c LP |
3212 | r = bus_match_parse(match, &components, &n_components); |
3213 | if (r < 0) | |
3214 | goto finish; | |
29ddb38f | 3215 | |
19befb2d LP |
3216 | s = bus_slot_allocate(bus, !slot, BUS_MATCH_CALLBACK, sizeof(struct match_callback), userdata); |
3217 | if (!s) { | |
3218 | r = -ENOMEM; | |
3219 | goto finish; | |
3220 | } | |
3221 | ||
3222 | s->match_callback.callback = callback; | |
7593c7a4 | 3223 | s->match_callback.install_callback = install_callback; |
19befb2d | 3224 | |
992c052c | 3225 | if (bus->bus_client) { |
cc65fe5e | 3226 | enum bus_match_scope scope; |
29ddb38f | 3227 | |
cc65fe5e | 3228 | scope = bus_match_get_scope(components, n_components); |
19befb2d | 3229 | |
7593c7a4 | 3230 | /* Do not install server-side matches for matches against the local service, interface or bus path. */ |
9ee7a50c | 3231 | if (scope != BUS_MATCH_LOCAL) { |
cc65fe5e | 3232 | |
7593c7a4 | 3233 | /* We store the original match string, so that we can use it to remove the match again. */ |
cc65fe5e | 3234 | |
a132bef0 ZJS |
3235 | s->match_callback.match_string = strdup(match); |
3236 | if (!s->match_callback.match_string) { | |
3237 | r = -ENOMEM; | |
3238 | goto finish; | |
19befb2d | 3239 | } |
19befb2d | 3240 | |
7593c7a4 LP |
3241 | if (asynchronous) |
3242 | r = bus_add_match_internal_async(bus, | |
3243 | &s->match_callback.install_slot, | |
3244 | s->match_callback.match_string, | |
3245 | add_match_callback, | |
3246 | s); | |
3247 | else | |
3248 | r = bus_add_match_internal(bus, s->match_callback.match_string); | |
cc65fe5e LP |
3249 | if (r < 0) |
3250 | goto finish; | |
3251 | ||
3252 | s->match_added = true; | |
3253 | } | |
392d5b37 LP |
3254 | } |
3255 | ||
992c052c | 3256 | bus->match_callbacks_modified = true; |
19befb2d LP |
3257 | r = bus_match_add(&bus->match_callbacks, components, n_components, &s->match_callback); |
3258 | if (r < 0) | |
3259 | goto finish; | |
3260 | ||
3261 | if (slot) | |
3262 | *slot = s; | |
3263 | s = NULL; | |
917b5dc7 | 3264 | |
992c052c LP |
3265 | finish: |
3266 | bus_match_parse_free(components, n_components); | |
19befb2d LP |
3267 | sd_bus_slot_unref(s); |
3268 | ||
992c052c | 3269 | return r; |
917b5dc7 LP |
3270 | } |
3271 | ||
7593c7a4 LP |
3272 | _public_ int sd_bus_add_match( |
3273 | sd_bus *bus, | |
3274 | sd_bus_slot **slot, | |
3275 | const char *match, | |
3276 | sd_bus_message_handler_t callback, | |
3277 | void *userdata) { | |
3278 | ||
3279 | return bus_add_match_full(bus, slot, false, match, callback, NULL, userdata); | |
3280 | } | |
3281 | ||
3282 | _public_ int sd_bus_add_match_async( | |
3283 | sd_bus *bus, | |
3284 | sd_bus_slot **slot, | |
3285 | const char *match, | |
3286 | sd_bus_message_handler_t callback, | |
3287 | sd_bus_message_handler_t install_callback, | |
3288 | void *userdata) { | |
3289 | ||
3290 | return bus_add_match_full(bus, slot, true, match, callback, install_callback, userdata); | |
3291 | } | |
3292 | ||
992c052c LP |
3293 | bool bus_pid_changed(sd_bus *bus) { |
3294 | assert(bus); | |
f10dda3b | 3295 | |
992c052c LP |
3296 | /* We don't support people creating a bus connection and |
3297 | * keeping it around over a fork(). Let's complain. */ | |
d5a2b9a6 | 3298 | |
df0ff127 | 3299 | return bus->original_pid != getpid_cached(); |
d5a2b9a6 | 3300 | } |
40ca29a1 LP |
3301 | |
3302 | static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
0927756b | 3303 | sd_bus *bus = userdata; |
40ca29a1 LP |
3304 | int r; |
3305 | ||
3306 | assert(bus); | |
3307 | ||
8a5cd31e LP |
3308 | /* Note that this is called both on input_fd, output_fd as well as inotify_fd events */ |
3309 | ||
40ca29a1 | 3310 | r = sd_bus_process(bus, NULL); |
5ae37ad8 LP |
3311 | if (r < 0) { |
3312 | log_debug_errno(r, "Processing of bus failed, closing down: %m"); | |
3313 | bus_enter_closing(bus); | |
3314 | } | |
40ca29a1 LP |
3315 | |
3316 | return 1; | |
3317 | } | |
3318 | ||
3319 | static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) { | |
0927756b | 3320 | sd_bus *bus = userdata; |
40ca29a1 LP |
3321 | int r; |
3322 | ||
3323 | assert(bus); | |
3324 | ||
3325 | r = sd_bus_process(bus, NULL); | |
5ae37ad8 LP |
3326 | if (r < 0) { |
3327 | log_debug_errno(r, "Processing of bus failed, closing down: %m"); | |
3328 | bus_enter_closing(bus); | |
3329 | } | |
40ca29a1 LP |
3330 | |
3331 | return 1; | |
3332 | } | |
3333 | ||
3334 | static int prepare_callback(sd_event_source *s, void *userdata) { | |
3335 | sd_bus *bus = userdata; | |
3336 | int r, e; | |
3337 | usec_t until; | |
3338 | ||
3339 | assert(s); | |
3340 | assert(bus); | |
3341 | ||
3342 | e = sd_bus_get_events(bus); | |
5ae37ad8 LP |
3343 | if (e < 0) { |
3344 | r = e; | |
3345 | goto fail; | |
3346 | } | |
40ca29a1 LP |
3347 | |
3348 | if (bus->output_fd != bus->input_fd) { | |
3349 | ||
3350 | r = sd_event_source_set_io_events(bus->input_io_event_source, e & POLLIN); | |
3351 | if (r < 0) | |
5ae37ad8 | 3352 | goto fail; |
40ca29a1 LP |
3353 | |
3354 | r = sd_event_source_set_io_events(bus->output_io_event_source, e & POLLOUT); | |
5ae37ad8 | 3355 | } else |
40ca29a1 | 3356 | r = sd_event_source_set_io_events(bus->input_io_event_source, e); |
5ae37ad8 LP |
3357 | if (r < 0) |
3358 | goto fail; | |
40ca29a1 LP |
3359 | |
3360 | r = sd_bus_get_timeout(bus, &until); | |
3361 | if (r < 0) | |
5ae37ad8 | 3362 | goto fail; |
40ca29a1 LP |
3363 | if (r > 0) { |
3364 | int j; | |
3365 | ||
3366 | j = sd_event_source_set_time(bus->time_event_source, until); | |
5ae37ad8 LP |
3367 | if (j < 0) { |
3368 | r = j; | |
3369 | goto fail; | |
3370 | } | |
40ca29a1 LP |
3371 | } |
3372 | ||
3373 | r = sd_event_source_set_enabled(bus->time_event_source, r > 0); | |
3374 | if (r < 0) | |
5ae37ad8 LP |
3375 | goto fail; |
3376 | ||
3377 | return 1; | |
3378 | ||
3379 | fail: | |
3380 | log_debug_errno(r, "Preparing of bus events failed, closing down: %m"); | |
3381 | bus_enter_closing(bus); | |
40ca29a1 LP |
3382 | |
3383 | return 1; | |
3384 | } | |
3385 | ||
abc5fe72 LP |
3386 | static int quit_callback(sd_event_source *event, void *userdata) { |
3387 | sd_bus *bus = userdata; | |
3388 | ||
3389 | assert(event); | |
3390 | ||
3391 | sd_bus_flush(bus); | |
7bb4d371 | 3392 | sd_bus_close(bus); |
abc5fe72 LP |
3393 | |
3394 | return 1; | |
3395 | } | |
3396 | ||
8a5cd31e | 3397 | int bus_attach_io_events(sd_bus *bus) { |
1e05d493 LP |
3398 | int r; |
3399 | ||
3400 | assert(bus); | |
3401 | ||
3402 | if (bus->input_fd < 0) | |
3403 | return 0; | |
3404 | ||
3405 | if (!bus->event) | |
3406 | return 0; | |
3407 | ||
3408 | if (!bus->input_io_event_source) { | |
151b9b96 | 3409 | r = sd_event_add_io(bus->event, &bus->input_io_event_source, bus->input_fd, 0, io_callback, bus); |
1e05d493 LP |
3410 | if (r < 0) |
3411 | return r; | |
3412 | ||
3413 | r = sd_event_source_set_prepare(bus->input_io_event_source, prepare_callback); | |
3414 | if (r < 0) | |
3415 | return r; | |
3416 | ||
3417 | r = sd_event_source_set_priority(bus->input_io_event_source, bus->event_priority); | |
9021bb9f TG |
3418 | if (r < 0) |
3419 | return r; | |
3420 | ||
356779df | 3421 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-input"); |
1e05d493 LP |
3422 | } else |
3423 | r = sd_event_source_set_io_fd(bus->input_io_event_source, bus->input_fd); | |
3424 | ||
3425 | if (r < 0) | |
3426 | return r; | |
3427 | ||
3428 | if (bus->output_fd != bus->input_fd) { | |
3429 | assert(bus->output_fd >= 0); | |
3430 | ||
3431 | if (!bus->output_io_event_source) { | |
151b9b96 | 3432 | r = sd_event_add_io(bus->event, &bus->output_io_event_source, bus->output_fd, 0, io_callback, bus); |
1e05d493 LP |
3433 | if (r < 0) |
3434 | return r; | |
3435 | ||
3436 | r = sd_event_source_set_priority(bus->output_io_event_source, bus->event_priority); | |
9021bb9f TG |
3437 | if (r < 0) |
3438 | return r; | |
3439 | ||
356779df | 3440 | r = sd_event_source_set_description(bus->input_io_event_source, "bus-output"); |
1e05d493 LP |
3441 | } else |
3442 | r = sd_event_source_set_io_fd(bus->output_io_event_source, bus->output_fd); | |
3443 | ||
3444 | if (r < 0) | |
3445 | return r; | |
3446 | } | |
3447 | ||
3448 | return 0; | |
3449 | } | |
3450 | ||
8a5cd31e | 3451 | static void bus_detach_io_events(sd_bus *bus) { |
1e05d493 LP |
3452 | assert(bus); |
3453 | ||
3454 | if (bus->input_io_event_source) { | |
3455 | sd_event_source_set_enabled(bus->input_io_event_source, SD_EVENT_OFF); | |
3456 | bus->input_io_event_source = sd_event_source_unref(bus->input_io_event_source); | |
3457 | } | |
3458 | ||
3459 | if (bus->output_io_event_source) { | |
3460 | sd_event_source_set_enabled(bus->output_io_event_source, SD_EVENT_OFF); | |
3461 | bus->output_io_event_source = sd_event_source_unref(bus->output_io_event_source); | |
3462 | } | |
3463 | } | |
3464 | ||
8a5cd31e LP |
3465 | int bus_attach_inotify_event(sd_bus *bus) { |
3466 | int r; | |
3467 | ||
3468 | assert(bus); | |
3469 | ||
3470 | if (bus->inotify_fd < 0) | |
3471 | return 0; | |
3472 | ||
3473 | if (!bus->event) | |
3474 | return 0; | |
3475 | ||
3476 | if (!bus->inotify_event_source) { | |
3477 | r = sd_event_add_io(bus->event, &bus->inotify_event_source, bus->inotify_fd, EPOLLIN, io_callback, bus); | |
3478 | if (r < 0) | |
3479 | return r; | |
3480 | ||
3481 | r = sd_event_source_set_priority(bus->inotify_event_source, bus->event_priority); | |
3482 | if (r < 0) | |
3483 | return r; | |
3484 | ||
3485 | r = sd_event_source_set_description(bus->inotify_event_source, "bus-inotify"); | |
3486 | } else | |
3487 | r = sd_event_source_set_io_fd(bus->inotify_event_source, bus->inotify_fd); | |
3488 | if (r < 0) | |
3489 | return r; | |
3490 | ||
3491 | return 0; | |
3492 | } | |
3493 | ||
3494 | static void bus_detach_inotify_event(sd_bus *bus) { | |
3495 | assert(bus); | |
3496 | ||
3497 | if (bus->inotify_event_source) { | |
3498 | sd_event_source_set_enabled(bus->inotify_event_source, SD_EVENT_OFF); | |
3499 | bus->inotify_event_source = sd_event_source_unref(bus->inotify_event_source); | |
3500 | } | |
3501 | } | |
3502 | ||
d9f644e2 | 3503 | _public_ int sd_bus_attach_event(sd_bus *bus, sd_event *event, int priority) { |
40ca29a1 LP |
3504 | int r; |
3505 | ||
3506 | assert_return(bus, -EINVAL); | |
45b1f410 | 3507 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
40ca29a1 LP |
3508 | assert_return(!bus->event, -EBUSY); |
3509 | ||
3510 | assert(!bus->input_io_event_source); | |
3511 | assert(!bus->output_io_event_source); | |
3512 | assert(!bus->time_event_source); | |
3513 | ||
76b54375 LP |
3514 | if (event) |
3515 | bus->event = sd_event_ref(event); | |
3516 | else { | |
3517 | r = sd_event_default(&bus->event); | |
3518 | if (r < 0) | |
3519 | return r; | |
3520 | } | |
40ca29a1 | 3521 | |
1e05d493 | 3522 | bus->event_priority = priority; |
40ca29a1 | 3523 | |
6a0f1f6d | 3524 | r = sd_event_add_time(bus->event, &bus->time_event_source, CLOCK_MONOTONIC, 0, 0, time_callback, bus); |
40ca29a1 LP |
3525 | if (r < 0) |
3526 | goto fail; | |
3527 | ||
3528 | r = sd_event_source_set_priority(bus->time_event_source, priority); | |
3529 | if (r < 0) | |
3530 | goto fail; | |
3531 | ||
356779df | 3532 | r = sd_event_source_set_description(bus->time_event_source, "bus-time"); |
9021bb9f TG |
3533 | if (r < 0) |
3534 | goto fail; | |
3535 | ||
151b9b96 | 3536 | r = sd_event_add_exit(bus->event, &bus->quit_event_source, quit_callback, bus); |
abc5fe72 LP |
3537 | if (r < 0) |
3538 | goto fail; | |
3539 | ||
356779df | 3540 | r = sd_event_source_set_description(bus->quit_event_source, "bus-exit"); |
9021bb9f TG |
3541 | if (r < 0) |
3542 | goto fail; | |
3543 | ||
8a5cd31e LP |
3544 | r = bus_attach_io_events(bus); |
3545 | if (r < 0) | |
3546 | goto fail; | |
3547 | ||
3548 | r = bus_attach_inotify_event(bus); | |
1e05d493 LP |
3549 | if (r < 0) |
3550 | goto fail; | |
3551 | ||
40ca29a1 LP |
3552 | return 0; |
3553 | ||
3554 | fail: | |
3555 | sd_bus_detach_event(bus); | |
3556 | return r; | |
3557 | } | |
3558 | ||
d9f644e2 | 3559 | _public_ int sd_bus_detach_event(sd_bus *bus) { |
40ca29a1 | 3560 | assert_return(bus, -EINVAL); |
45b1f410 | 3561 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
a82cafb9 LP |
3562 | |
3563 | if (!bus->event) | |
3564 | return 0; | |
40ca29a1 | 3565 | |
8a5cd31e LP |
3566 | bus_detach_io_events(bus); |
3567 | bus_detach_inotify_event(bus); | |
40ca29a1 | 3568 | |
86befb40 LP |
3569 | if (bus->time_event_source) { |
3570 | sd_event_source_set_enabled(bus->time_event_source, SD_EVENT_OFF); | |
40ca29a1 | 3571 | bus->time_event_source = sd_event_source_unref(bus->time_event_source); |
86befb40 | 3572 | } |
40ca29a1 | 3573 | |
86befb40 LP |
3574 | if (bus->quit_event_source) { |
3575 | sd_event_source_set_enabled(bus->quit_event_source, SD_EVENT_OFF); | |
abc5fe72 | 3576 | bus->quit_event_source = sd_event_source_unref(bus->quit_event_source); |
86befb40 | 3577 | } |
abc5fe72 | 3578 | |
93f1bcf4 | 3579 | bus->event = sd_event_unref(bus->event); |
a82cafb9 | 3580 | return 1; |
40ca29a1 | 3581 | } |
affff0b6 | 3582 | |
2be44176 LP |
3583 | _public_ sd_event* sd_bus_get_event(sd_bus *bus) { |
3584 | assert_return(bus, NULL); | |
3585 | ||
3586 | return bus->event; | |
3587 | } | |
3588 | ||
19befb2d LP |
3589 | _public_ sd_bus_message* sd_bus_get_current_message(sd_bus *bus) { |
3590 | assert_return(bus, NULL); | |
3591 | ||
3592 | return bus->current_message; | |
3593 | } | |
3594 | ||
3595 | _public_ sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus) { | |
affff0b6 LP |
3596 | assert_return(bus, NULL); |
3597 | ||
19befb2d | 3598 | return bus->current_slot; |
affff0b6 | 3599 | } |
76b54375 | 3600 | |
caa82984 LP |
3601 | _public_ sd_bus_message_handler_t sd_bus_get_current_handler(sd_bus *bus) { |
3602 | assert_return(bus, NULL); | |
3603 | ||
3604 | return bus->current_handler; | |
3605 | } | |
3606 | ||
3607 | _public_ void* sd_bus_get_current_userdata(sd_bus *bus) { | |
3608 | assert_return(bus, NULL); | |
3609 | ||
3610 | return bus->current_userdata; | |
3611 | } | |
3612 | ||
76b54375 LP |
3613 | static int bus_default(int (*bus_open)(sd_bus **), sd_bus **default_bus, sd_bus **ret) { |
3614 | sd_bus *b = NULL; | |
3615 | int r; | |
3616 | ||
3617 | assert(bus_open); | |
3618 | assert(default_bus); | |
3619 | ||
3620 | if (!ret) | |
3621 | return !!*default_bus; | |
3622 | ||
3623 | if (*default_bus) { | |
3624 | *ret = sd_bus_ref(*default_bus); | |
3625 | return 0; | |
3626 | } | |
3627 | ||
3628 | r = bus_open(&b); | |
3629 | if (r < 0) | |
3630 | return r; | |
3631 | ||
3632 | b->default_bus_ptr = default_bus; | |
3633 | b->tid = gettid(); | |
3634 | *default_bus = b; | |
3635 | ||
3636 | *ret = b; | |
3637 | return 1; | |
3638 | } | |
3639 | ||
3640 | _public_ int sd_bus_default_system(sd_bus **ret) { | |
76b54375 LP |
3641 | return bus_default(sd_bus_open_system, &default_system_bus, ret); |
3642 | } | |
3643 | ||
fa2f8973 | 3644 | _public_ int sd_bus_default_user(sd_bus **ret) { |
76b54375 LP |
3645 | return bus_default(sd_bus_open_user, &default_user_bus, ret); |
3646 | } | |
3647 | ||
af08d2f9 | 3648 | _public_ int sd_bus_default(sd_bus **ret) { |
45b1f410 NM |
3649 | int (*bus_open)(sd_bus **) = NULL; |
3650 | sd_bus **busp; | |
af08d2f9 | 3651 | |
45b1f410 NM |
3652 | busp = bus_choose_default(&bus_open); |
3653 | return bus_default(bus_open, busp, ret); | |
af08d2f9 LP |
3654 | } |
3655 | ||
76b54375 LP |
3656 | _public_ int sd_bus_get_tid(sd_bus *b, pid_t *tid) { |
3657 | assert_return(b, -EINVAL); | |
3658 | assert_return(tid, -EINVAL); | |
3659 | assert_return(!bus_pid_changed(b), -ECHILD); | |
3660 | ||
3661 | if (b->tid != 0) { | |
3662 | *tid = b->tid; | |
3663 | return 0; | |
3664 | } | |
3665 | ||
3666 | if (b->event) | |
3667 | return sd_event_get_tid(b->event, tid); | |
3668 | ||
3669 | return -ENXIO; | |
3670 | } | |
28383ba1 | 3671 | |
a6278b88 LP |
3672 | _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, char **ret_path) { |
3673 | _cleanup_free_ char *e = NULL; | |
3674 | char *ret; | |
3675 | ||
3676 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3677 | assert_return(external_id, -EINVAL); | |
3678 | assert_return(ret_path, -EINVAL); | |
3679 | ||
3680 | e = bus_label_escape(external_id); | |
3681 | if (!e) | |
3682 | return -ENOMEM; | |
3683 | ||
605405c6 | 3684 | ret = strjoin(prefix, "/", e); |
a6278b88 LP |
3685 | if (!ret) |
3686 | return -ENOMEM; | |
3687 | ||
3688 | *ret_path = ret; | |
3689 | return 0; | |
28383ba1 LP |
3690 | } |
3691 | ||
a6278b88 LP |
3692 | _public_ int sd_bus_path_decode(const char *path, const char *prefix, char **external_id) { |
3693 | const char *e; | |
3694 | char *ret; | |
3695 | ||
3696 | assert_return(object_path_is_valid(path), -EINVAL); | |
3697 | assert_return(object_path_is_valid(prefix), -EINVAL); | |
3698 | assert_return(external_id, -EINVAL); | |
3699 | ||
3700 | e = object_path_startswith(path, prefix); | |
3701 | if (!e) { | |
3702 | *external_id = NULL; | |
3703 | return 0; | |
3704 | } | |
3705 | ||
3706 | ret = bus_label_unescape(e); | |
3707 | if (!ret) | |
3708 | return -ENOMEM; | |
3709 | ||
3710 | *external_id = ret; | |
3711 | return 1; | |
28383ba1 | 3712 | } |
5b12334d | 3713 | |
dfb815c3 DH |
3714 | _public_ int sd_bus_path_encode_many(char **out, const char *path_template, ...) { |
3715 | _cleanup_strv_free_ char **labels = NULL; | |
3716 | char *path, *path_pos, **label_pos; | |
3717 | const char *sep, *template_pos; | |
3718 | size_t path_length; | |
3719 | va_list list; | |
3720 | int r; | |
3721 | ||
3722 | assert_return(out, -EINVAL); | |
3723 | assert_return(path_template, -EINVAL); | |
3724 | ||
3725 | path_length = strlen(path_template); | |
3726 | ||
19932084 | 3727 | va_start(list, path_template); |
dfb815c3 DH |
3728 | for (sep = strchr(path_template, '%'); sep; sep = strchr(sep + 1, '%')) { |
3729 | const char *arg; | |
3730 | char *label; | |
3731 | ||
3732 | arg = va_arg(list, const char *); | |
3733 | if (!arg) { | |
3734 | va_end(list); | |
3735 | return -EINVAL; | |
3736 | } | |
3737 | ||
3738 | label = bus_label_escape(arg); | |
3739 | if (!label) { | |
3740 | va_end(list); | |
3741 | return -ENOMEM; | |
3742 | } | |
3743 | ||
3744 | r = strv_consume(&labels, label); | |
3745 | if (r < 0) { | |
3746 | va_end(list); | |
3747 | return r; | |
3748 | } | |
3749 | ||
3750 | /* add label length, but account for the format character */ | |
3751 | path_length += strlen(label) - 1; | |
3752 | } | |
3753 | va_end(list); | |
3754 | ||
3755 | path = malloc(path_length + 1); | |
3756 | if (!path) | |
3757 | return -ENOMEM; | |
3758 | ||
3759 | path_pos = path; | |
3760 | label_pos = labels; | |
3761 | ||
3762 | for (template_pos = path_template; *template_pos; ) { | |
3763 | sep = strchrnul(template_pos, '%'); | |
3764 | path_pos = mempcpy(path_pos, template_pos, sep - template_pos); | |
3765 | if (!*sep) | |
3766 | break; | |
3767 | ||
3768 | path_pos = stpcpy(path_pos, *label_pos++); | |
3769 | template_pos = sep + 1; | |
3770 | } | |
3771 | ||
3772 | *path_pos = 0; | |
3773 | *out = path; | |
3774 | return 0; | |
3775 | } | |
3776 | ||
3777 | _public_ int sd_bus_path_decode_many(const char *path, const char *path_template, ...) { | |
3778 | _cleanup_strv_free_ char **labels = NULL; | |
3779 | const char *template_pos, *path_pos; | |
3780 | char **label_pos; | |
3781 | va_list list; | |
3782 | int r; | |
3783 | ||
3784 | /* | |
3785 | * This decodes an object-path based on a template argument. The | |
3786 | * template consists of a verbatim path, optionally including special | |
3787 | * directives: | |
3788 | * | |
3789 | * - Each occurrence of '%' in the template matches an arbitrary | |
3790 | * substring of a label in the given path. At most one such | |
3791 | * directive is allowed per label. For each such directive, the | |
3792 | * caller must provide an output parameter (char **) via va_arg. If | |
3793 | * NULL is passed, the given label is verified, but not returned. | |
3794 | * For each matched label, the *decoded* label is stored in the | |
3795 | * passed output argument, and the caller is responsible to free | |
3796 | * it. Note that the output arguments are only modified if the | |
3797 | * actualy path matched the template. Otherwise, they're left | |
3798 | * untouched. | |
3799 | * | |
3800 | * This function returns <0 on error, 0 if the path does not match the | |
3801 | * template, 1 if it matched. | |
3802 | */ | |
3803 | ||
3804 | assert_return(path, -EINVAL); | |
3805 | assert_return(path_template, -EINVAL); | |
3806 | ||
3807 | path_pos = path; | |
3808 | ||
3809 | for (template_pos = path_template; *template_pos; ) { | |
3810 | const char *sep; | |
3811 | size_t length; | |
3812 | char *label; | |
3813 | ||
3814 | /* verify everything until the next '%' matches verbatim */ | |
3815 | sep = strchrnul(template_pos, '%'); | |
3816 | length = sep - template_pos; | |
3817 | if (strncmp(path_pos, template_pos, length)) | |
3818 | return 0; | |
3819 | ||
3820 | path_pos += length; | |
3821 | template_pos += length; | |
3822 | ||
3823 | if (!*template_pos) | |
3824 | break; | |
3825 | ||
3826 | /* We found the next '%' character. Everything up until here | |
3827 | * matched. We now skip ahead to the end of this label and make | |
3828 | * sure it matches the tail of the label in the path. Then we | |
3829 | * decode the string in-between and save it for later use. */ | |
3830 | ||
3831 | ++template_pos; /* skip over '%' */ | |
3832 | ||
3833 | sep = strchrnul(template_pos, '/'); | |
3834 | length = sep - template_pos; /* length of suffix to match verbatim */ | |
3835 | ||
3836 | /* verify the suffixes match */ | |
3837 | sep = strchrnul(path_pos, '/'); | |
3838 | if (sep - path_pos < (ssize_t)length || | |
3839 | strncmp(sep - length, template_pos, length)) | |
3840 | return 0; | |
3841 | ||
3842 | template_pos += length; /* skip over matched label */ | |
3843 | length = sep - path_pos - length; /* length of sub-label to decode */ | |
3844 | ||
3845 | /* store unescaped label for later use */ | |
3846 | label = bus_label_unescape_n(path_pos, length); | |
3847 | if (!label) | |
3848 | return -ENOMEM; | |
3849 | ||
3850 | r = strv_consume(&labels, label); | |
3851 | if (r < 0) | |
3852 | return r; | |
3853 | ||
3854 | path_pos = sep; /* skip decoded label and suffix */ | |
3855 | } | |
3856 | ||
3857 | /* end of template must match end of path */ | |
3858 | if (*path_pos) | |
3859 | return 0; | |
3860 | ||
3861 | /* copy the labels over to the caller */ | |
19932084 | 3862 | va_start(list, path_template); |
dfb815c3 DH |
3863 | for (label_pos = labels; label_pos && *label_pos; ++label_pos) { |
3864 | char **arg; | |
3865 | ||
3866 | arg = va_arg(list, char **); | |
3867 | if (arg) | |
3868 | *arg = *label_pos; | |
3869 | else | |
3870 | free(*label_pos); | |
3871 | } | |
3872 | va_end(list); | |
3873 | ||
86ed6d1b | 3874 | labels = mfree(labels); |
dfb815c3 DH |
3875 | return 1; |
3876 | } | |
3877 | ||
ae095f86 | 3878 | _public_ int sd_bus_try_close(sd_bus *bus) { |
ae095f86 | 3879 | assert_return(bus, -EINVAL); |
45b1f410 | 3880 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
ae095f86 | 3881 | assert_return(!bus_pid_changed(bus), -ECHILD); |
a3d59cd1 | 3882 | |
a132bef0 | 3883 | return -EOPNOTSUPP; |
ae095f86 | 3884 | } |
5972fe95 | 3885 | |
455971c1 | 3886 | _public_ int sd_bus_get_description(sd_bus *bus, const char **description) { |
5972fe95 | 3887 | assert_return(bus, -EINVAL); |
45b1f410 | 3888 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
455971c1 | 3889 | assert_return(description, -EINVAL); |
f4b2933e | 3890 | assert_return(bus->description, -ENXIO); |
5972fe95 LP |
3891 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3892 | ||
201e419a LP |
3893 | if (bus->description) |
3894 | *description = bus->description; | |
3895 | else if (bus->is_system) | |
3896 | *description = "system"; | |
3897 | else if (bus->is_user) | |
3898 | *description = "user"; | |
3899 | else | |
3900 | *description = NULL; | |
3901 | ||
5972fe95 LP |
3902 | return 0; |
3903 | } | |
fe3f22d1 DK |
3904 | |
3905 | int bus_get_root_path(sd_bus *bus) { | |
3906 | int r; | |
3907 | ||
3908 | if (bus->cgroup_root) | |
3909 | return 0; | |
3910 | ||
3911 | r = cg_get_root_path(&bus->cgroup_root); | |
3912 | if (r == -ENOENT) { | |
3913 | bus->cgroup_root = strdup("/"); | |
3914 | if (!bus->cgroup_root) | |
3915 | return -ENOMEM; | |
3916 | ||
3917 | r = 0; | |
3918 | } | |
3919 | ||
3920 | return r; | |
3921 | } | |
3acc1daf LP |
3922 | |
3923 | _public_ int sd_bus_get_scope(sd_bus *bus, const char **scope) { | |
3acc1daf | 3924 | assert_return(bus, -EINVAL); |
45b1f410 | 3925 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
3acc1daf LP |
3926 | assert_return(scope, -EINVAL); |
3927 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3928 | ||
3acc1daf LP |
3929 | if (bus->is_user) { |
3930 | *scope = "user"; | |
5b820358 | 3931 | return 0; |
3acc1daf LP |
3932 | } |
3933 | ||
3934 | if (bus->is_system) { | |
3935 | *scope = "system"; | |
5b820358 LP |
3936 | return 0; |
3937 | } | |
3938 | ||
3939 | return -ENODATA; | |
3940 | } | |
3941 | ||
3942 | _public_ int sd_bus_get_address(sd_bus *bus, const char **address) { | |
3943 | ||
3944 | assert_return(bus, -EINVAL); | |
45b1f410 | 3945 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
5b820358 LP |
3946 | assert_return(address, -EINVAL); |
3947 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3948 | ||
3949 | if (bus->address) { | |
3950 | *address = bus->address; | |
3951 | return 0; | |
3acc1daf LP |
3952 | } |
3953 | ||
3954 | return -ENODATA; | |
3955 | } | |
224b3787 | 3956 | |
882897af | 3957 | _public_ int sd_bus_get_creds_mask(sd_bus *bus, uint64_t *mask) { |
224b3787 | 3958 | assert_return(bus, -EINVAL); |
45b1f410 | 3959 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
3960 | assert_return(mask, -EINVAL); |
3961 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
3962 | ||
3963 | *mask = bus->creds_mask; | |
3964 | return 0; | |
3965 | } | |
3966 | ||
882897af | 3967 | _public_ int sd_bus_is_bus_client(sd_bus *bus) { |
224b3787 | 3968 | assert_return(bus, -EINVAL); |
45b1f410 | 3969 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
3970 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3971 | ||
3972 | return bus->bus_client; | |
3973 | } | |
3974 | ||
882897af | 3975 | _public_ int sd_bus_is_server(sd_bus *bus) { |
224b3787 | 3976 | assert_return(bus, -EINVAL); |
45b1f410 | 3977 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
3978 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3979 | ||
3980 | return bus->is_server; | |
3981 | } | |
3982 | ||
882897af | 3983 | _public_ int sd_bus_is_anonymous(sd_bus *bus) { |
224b3787 | 3984 | assert_return(bus, -EINVAL); |
45b1f410 | 3985 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
3986 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3987 | ||
3988 | return bus->anonymous_auth; | |
3989 | } | |
3990 | ||
882897af | 3991 | _public_ int sd_bus_is_trusted(sd_bus *bus) { |
224b3787 | 3992 | assert_return(bus, -EINVAL); |
45b1f410 | 3993 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
3994 | assert_return(!bus_pid_changed(bus), -ECHILD); |
3995 | ||
3996 | return bus->trusted; | |
3997 | } | |
3998 | ||
882897af | 3999 | _public_ int sd_bus_is_monitor(sd_bus *bus) { |
224b3787 | 4000 | assert_return(bus, -EINVAL); |
45b1f410 | 4001 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
224b3787 LP |
4002 | assert_return(!bus_pid_changed(bus), -ECHILD); |
4003 | ||
c7db1984 | 4004 | return bus->is_monitor; |
224b3787 | 4005 | } |
fa2f8973 LP |
4006 | |
4007 | static void flush_close(sd_bus *bus) { | |
4008 | if (!bus) | |
4009 | return; | |
4010 | ||
4011 | /* Flushes and closes the specified bus. We take a ref before, | |
4012 | * to ensure the flushing does not cause the bus to be | |
4013 | * unreferenced. */ | |
4014 | ||
4015 | sd_bus_flush_close_unref(sd_bus_ref(bus)); | |
4016 | } | |
4017 | ||
4018 | _public_ void sd_bus_default_flush_close(void) { | |
4019 | flush_close(default_starter_bus); | |
4020 | flush_close(default_user_bus); | |
4021 | flush_close(default_system_bus); | |
4022 | } | |
fbb4603d LP |
4023 | |
4024 | _public_ int sd_bus_set_exit_on_disconnect(sd_bus *bus, int b) { | |
4025 | assert_return(bus, -EINVAL); | |
45b1f410 | 4026 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
fbb4603d LP |
4027 | |
4028 | /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already | |
4029 | * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never | |
4030 | * from the client side. */ | |
4031 | bus->exit_on_disconnect = b; | |
4032 | ||
4033 | /* If the exit condition was triggered already, exit immediately. */ | |
4034 | return bus_exit_now(bus); | |
4035 | } | |
4036 | ||
4037 | _public_ int sd_bus_get_exit_on_disconnect(sd_bus *bus) { | |
4038 | assert_return(bus, -EINVAL); | |
45b1f410 | 4039 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
fbb4603d LP |
4040 | |
4041 | return bus->exit_on_disconnect; | |
4042 | } | |
48ef41a3 LP |
4043 | |
4044 | _public_ int sd_bus_set_sender(sd_bus *bus, const char *sender) { | |
4045 | assert_return(bus, -EINVAL); | |
45b1f410 | 4046 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
48ef41a3 LP |
4047 | assert_return(!bus->bus_client, -EPERM); |
4048 | assert_return(!sender || service_name_is_valid(sender), -EINVAL); | |
4049 | ||
4050 | return free_and_strdup(&bus->patch_sender, sender); | |
4051 | } | |
4052 | ||
4053 | _public_ int sd_bus_get_sender(sd_bus *bus, const char **ret) { | |
4054 | assert_return(bus, -EINVAL); | |
45b1f410 | 4055 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
48ef41a3 LP |
4056 | assert_return(ret, -EINVAL); |
4057 | ||
4058 | if (!bus->patch_sender) | |
4059 | return -ENODATA; | |
4060 | ||
4061 | *ret = bus->patch_sender; | |
4062 | return 0; | |
4063 | } | |
2770da02 LP |
4064 | |
4065 | _public_ int sd_bus_get_n_queued_read(sd_bus *bus, uint64_t *ret) { | |
4066 | assert_return(bus, -EINVAL); | |
4067 | assert_return(bus = bus_resolve(bus), -ENOPKG); | |
4068 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
4069 | assert_return(ret, -EINVAL); | |
4070 | ||
4071 | *ret = bus->rqueue_size; | |
4072 | return 0; | |
4073 | } | |
4074 | ||
4075 | _public_ int sd_bus_get_n_queued_write(sd_bus *bus, uint64_t *ret) { | |
4076 | assert_return(bus, -EINVAL); | |
4077 | assert_return(bus = bus_resolve(bus), -ENOPKG); | |
4078 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
4079 | assert_return(ret, -EINVAL); | |
4080 | ||
4081 | *ret = bus->wqueue_size; | |
4082 | return 0; | |
4083 | } |