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ea430986 LP |
1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
ea430986 LP |
22 | #include <dbus/dbus.h> |
23 | ||
24 | #include <sys/epoll.h> | |
25 | #include <sys/timerfd.h> | |
26 | #include <errno.h> | |
27 | #include <unistd.h> | |
28 | ||
29 | #include "dbus.h" | |
30 | #include "log.h" | |
31 | #include "strv.h" | |
32 | ||
33 | static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) { | |
34 | Manager *m = data; | |
35 | ||
36 | assert(bus); | |
37 | assert(m); | |
38 | ||
39 | m->request_bus_dispatch = status != DBUS_DISPATCH_COMPLETE; | |
40 | } | |
41 | ||
42 | static uint32_t bus_flags_to_events(DBusWatch *bus_watch) { | |
43 | unsigned flags; | |
44 | uint32_t events = 0; | |
45 | ||
46 | assert(bus_watch); | |
47 | ||
48 | /* no watch flags for disabled watches */ | |
49 | if (!dbus_watch_get_enabled(bus_watch)) | |
50 | return 0; | |
51 | ||
52 | flags = dbus_watch_get_flags(bus_watch); | |
53 | ||
54 | if (flags & DBUS_WATCH_READABLE) | |
55 | events |= EPOLLIN; | |
56 | if (flags & DBUS_WATCH_WRITABLE) | |
57 | events |= EPOLLOUT; | |
58 | ||
59 | return events | EPOLLHUP | EPOLLERR; | |
60 | } | |
61 | ||
62 | static unsigned events_to_bus_flags(uint32_t events) { | |
63 | unsigned flags = 0; | |
64 | ||
65 | if (events & EPOLLIN) | |
66 | flags |= DBUS_WATCH_READABLE; | |
67 | if (events & EPOLLOUT) | |
68 | flags |= DBUS_WATCH_WRITABLE; | |
69 | if (events & EPOLLHUP) | |
70 | flags |= DBUS_WATCH_HANGUP; | |
71 | if (events & EPOLLERR) | |
72 | flags |= DBUS_WATCH_ERROR; | |
73 | ||
74 | return flags; | |
75 | } | |
76 | ||
77 | void bus_watch_event(Manager *m, Watch *w, int events) { | |
78 | assert(m); | |
79 | assert(w); | |
80 | ||
81 | /* This is called by the event loop whenever there is | |
82 | * something happening on D-Bus' file handles. */ | |
83 | ||
84 | if (!(dbus_watch_get_enabled(w->data.bus_watch))) | |
85 | return; | |
86 | ||
87 | dbus_watch_handle(w->data.bus_watch, events_to_bus_flags(events)); | |
88 | } | |
89 | ||
90 | static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) { | |
91 | Manager *m = data; | |
92 | Watch *w; | |
93 | struct epoll_event ev; | |
94 | ||
95 | assert(bus_watch); | |
96 | assert(m); | |
97 | ||
98 | if (!(w = new0(Watch, 1))) | |
99 | return FALSE; | |
100 | ||
101 | w->fd = dbus_watch_get_unix_fd(bus_watch); | |
102 | w->type = WATCH_DBUS_WATCH; | |
103 | w->data.bus_watch = bus_watch; | |
104 | ||
105 | zero(ev); | |
106 | ev.events = bus_flags_to_events(bus_watch); | |
107 | ev.data.ptr = w; | |
108 | ||
109 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) { | |
110 | ||
111 | if (errno != EEXIST) { | |
112 | free(w); | |
113 | return FALSE; | |
114 | } | |
115 | ||
116 | /* Hmm, bloody D-Bus creates multiple watches on the | |
117 | * same fd. epoll() does not like that. As a dirty | |
118 | * hack we simply dup() the fd and hence get a second | |
119 | * one we can safely add to the epoll(). */ | |
120 | ||
121 | if ((w->fd = dup(w->fd)) < 0) { | |
122 | free(w); | |
123 | return FALSE; | |
124 | } | |
125 | ||
126 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) { | |
127 | free(w); | |
128 | close_nointr_nofail(w->fd); | |
129 | return FALSE; | |
130 | } | |
131 | ||
132 | w->fd_is_dupped = true; | |
133 | } | |
134 | ||
135 | dbus_watch_set_data(bus_watch, w, NULL); | |
136 | ||
137 | return TRUE; | |
138 | } | |
139 | ||
140 | static void bus_remove_watch(DBusWatch *bus_watch, void *data) { | |
141 | Manager *m = data; | |
142 | Watch *w; | |
143 | ||
144 | assert(bus_watch); | |
145 | assert(m); | |
146 | ||
147 | if (!(w = dbus_watch_get_data(bus_watch))) | |
148 | return; | |
149 | ||
150 | assert(w->type == WATCH_DBUS_WATCH); | |
151 | assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
152 | ||
153 | if (w->fd_is_dupped) | |
154 | close_nointr_nofail(w->fd); | |
155 | ||
156 | free(w); | |
157 | } | |
158 | ||
159 | static void bus_toggle_watch(DBusWatch *bus_watch, void *data) { | |
160 | Manager *m = data; | |
161 | Watch *w; | |
162 | struct epoll_event ev; | |
163 | ||
164 | assert(bus_watch); | |
165 | assert(m); | |
166 | ||
167 | assert_se(w = dbus_watch_get_data(bus_watch)); | |
168 | assert(w->type == WATCH_DBUS_WATCH); | |
169 | ||
170 | zero(ev); | |
171 | ev.events = bus_flags_to_events(bus_watch); | |
172 | ev.data.ptr = w; | |
173 | ||
174 | assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0); | |
175 | } | |
176 | ||
177 | static int bus_timeout_arm(Manager *m, Watch *w) { | |
178 | struct itimerspec its; | |
179 | ||
180 | assert(m); | |
181 | assert(w); | |
182 | ||
183 | zero(its); | |
184 | ||
185 | if (dbus_timeout_get_enabled(w->data.bus_timeout)) { | |
186 | timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC); | |
187 | its.it_interval = its.it_interval; | |
188 | } | |
189 | ||
190 | if (timerfd_settime(w->fd, 0, &its, NULL) < 0) | |
191 | return -errno; | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | void bus_timeout_event(Manager *m, Watch *w, int events) { | |
197 | assert(m); | |
198 | assert(w); | |
199 | ||
200 | /* This is called by the event loop whenever there is | |
201 | * something happening on D-Bus' file handles. */ | |
202 | ||
203 | if (!(dbus_timeout_get_enabled(w->data.bus_timeout))) | |
204 | return; | |
205 | ||
206 | dbus_timeout_handle(w->data.bus_timeout); | |
207 | } | |
208 | ||
209 | static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) { | |
210 | Manager *m = data; | |
211 | Watch *w; | |
212 | struct epoll_event ev; | |
213 | ||
214 | assert(timeout); | |
215 | assert(m); | |
216 | ||
217 | if (!(w = new0(Watch, 1))) | |
218 | return FALSE; | |
219 | ||
220 | if (!(w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) | |
221 | goto fail; | |
222 | ||
223 | w->type = WATCH_DBUS_TIMEOUT; | |
224 | w->data.bus_timeout = timeout; | |
225 | ||
226 | if (bus_timeout_arm(m, w) < 0) | |
227 | goto fail; | |
228 | ||
229 | zero(ev); | |
230 | ev.events = EPOLLIN; | |
231 | ev.data.ptr = w; | |
232 | ||
233 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) | |
234 | goto fail; | |
235 | ||
236 | dbus_timeout_set_data(timeout, w, NULL); | |
237 | ||
238 | return TRUE; | |
239 | ||
240 | fail: | |
241 | if (w->fd >= 0) | |
242 | close_nointr_nofail(w->fd); | |
243 | ||
244 | free(w); | |
245 | return FALSE; | |
246 | } | |
247 | ||
248 | static void bus_remove_timeout(DBusTimeout *timeout, void *data) { | |
249 | Manager *m = data; | |
250 | Watch *w; | |
251 | ||
252 | assert(timeout); | |
253 | assert(m); | |
254 | ||
255 | if (!(w = dbus_timeout_get_data(timeout))) | |
256 | return; | |
257 | ||
258 | assert(w->type == WATCH_DBUS_TIMEOUT); | |
259 | assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
260 | close_nointr_nofail(w->fd); | |
261 | free(w); | |
262 | } | |
263 | ||
264 | static void bus_toggle_timeout(DBusTimeout *timeout, void *data) { | |
265 | Manager *m = data; | |
266 | Watch *w; | |
267 | int r; | |
268 | ||
269 | assert(timeout); | |
270 | assert(m); | |
271 | ||
272 | assert_se(w = dbus_timeout_get_data(timeout)); | |
273 | assert(w->type == WATCH_DBUS_TIMEOUT); | |
274 | ||
275 | if ((r = bus_timeout_arm(m, w)) < 0) | |
276 | log_error("Failed to rearm timer: %s", strerror(-r)); | |
277 | } | |
278 | ||
c1e1601e LP |
279 | static DBusHandlerResult bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { |
280 | Manager *m = data; | |
281 | DBusError error; | |
282 | ||
283 | assert(connection); | |
284 | assert(message); | |
285 | assert(m); | |
286 | ||
287 | dbus_error_init(&error); | |
288 | ||
289 | /* log_debug("Got D-Bus request: %s.%s() on %s", */ | |
290 | /* dbus_message_get_interface(message), */ | |
291 | /* dbus_message_get_member(message), */ | |
292 | /* dbus_message_get_path(message)); */ | |
293 | ||
294 | if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { | |
295 | log_error("Warning! D-Bus connection terminated."); | |
296 | ||
297 | /* FIXME: we probably should restart D-Bus here */ | |
298 | ||
299 | } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) { | |
300 | const char *name, *old, *new; | |
301 | ||
302 | if (!dbus_message_get_args(message, &error, | |
303 | DBUS_TYPE_STRING, &name, | |
304 | DBUS_TYPE_STRING, &old, | |
305 | DBUS_TYPE_STRING, &new, | |
306 | DBUS_TYPE_INVALID)) | |
307 | log_error("Failed to parse NameOwnerChanged message: %s", error.message); | |
308 | else { | |
309 | if (set_remove(m->subscribed, (char*) name)) | |
310 | log_debug("Subscription client vanished: %s (left: %u)", name, set_size(m->subscribed)); | |
311 | } | |
312 | } | |
313 | ||
314 | dbus_error_free(&error); | |
315 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
316 | } | |
317 | ||
318 | unsigned bus_dispatch(Manager *m) { | |
ea430986 LP |
319 | assert(m); |
320 | ||
c1e1601e LP |
321 | if (!m->request_bus_dispatch) |
322 | return 0; | |
323 | ||
ea430986 LP |
324 | if (dbus_connection_dispatch(m->bus) == DBUS_DISPATCH_COMPLETE) |
325 | m->request_bus_dispatch = false; | |
c1e1601e LP |
326 | |
327 | return 1; | |
ea430986 LP |
328 | } |
329 | ||
330 | static int request_name(Manager *m) { | |
331 | DBusMessage *message; | |
332 | const char *name = "org.freedesktop.systemd1"; | |
333 | uint32_t flags = 0; | |
334 | ||
335 | if (!(message = dbus_message_new_method_call( | |
336 | DBUS_SERVICE_DBUS, | |
337 | DBUS_PATH_DBUS, | |
338 | DBUS_INTERFACE_DBUS, | |
339 | "RequestName"))) | |
340 | return -ENOMEM; | |
341 | ||
342 | if (!dbus_message_append_args( | |
343 | message, | |
344 | DBUS_TYPE_STRING, &name, | |
345 | DBUS_TYPE_UINT32, &flags, | |
346 | DBUS_TYPE_INVALID)) { | |
347 | dbus_message_unref(message); | |
348 | return -ENOMEM; | |
349 | } | |
350 | ||
351 | if (!dbus_connection_send(m->bus, message, NULL)) { | |
352 | dbus_message_unref(message); | |
353 | return -ENOMEM; | |
354 | } | |
355 | ||
356 | /* We simple ask for the name and don't wait for it. Sooner or | |
357 | * later we'll have it, and we wouldn't know what to do on | |
358 | * error anyway. */ | |
359 | ||
360 | dbus_message_unref(message); | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | int bus_init(Manager *m) { | |
366 | DBusError error; | |
367 | char *id; | |
368 | int r; | |
369 | ||
370 | assert(m); | |
371 | ||
372 | if (m->bus) | |
373 | return 0; | |
374 | ||
c1e1601e LP |
375 | if (!(m->subscribed = set_new(string_hash_func, string_compare_func))) |
376 | return -ENOMEM; | |
377 | ||
ea430986 LP |
378 | dbus_connection_set_change_sigpipe(FALSE); |
379 | ||
380 | dbus_error_init(&error); | |
381 | if (!(m->bus = dbus_bus_get_private(m->is_init ? DBUS_BUS_SYSTEM : DBUS_BUS_SESSION, &error))) { | |
382 | log_error("Failed to get D-Bus connection: %s", error.message); | |
383 | dbus_error_free(&error); | |
384 | return -ECONNREFUSED; | |
385 | } | |
386 | ||
387 | dbus_connection_set_exit_on_disconnect(m->bus, FALSE); | |
388 | dbus_connection_set_dispatch_status_function(m->bus, bus_dispatch_status, m, NULL); | |
389 | if (!dbus_connection_set_watch_functions(m->bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) || | |
390 | !dbus_connection_set_timeout_functions(m->bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL) || | |
391 | !dbus_connection_register_object_path(m->bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) || | |
392 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) || | |
c1e1601e LP |
393 | !dbus_connection_register_fallback(m->bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) || |
394 | !dbus_connection_add_filter(m->bus, bus_message_filter, m, NULL)) { | |
395 | bus_done(m); | |
396 | return -ENOMEM; | |
397 | } | |
398 | ||
399 | dbus_bus_add_match(m->bus, | |
400 | "type='signal'," | |
401 | "sender='"DBUS_SERVICE_DBUS"'," | |
402 | "interface='"DBUS_INTERFACE_DBUS"'," | |
403 | "path='"DBUS_PATH_DBUS"'", | |
404 | &error); | |
405 | ||
406 | if (dbus_error_is_set(&error)) { | |
407 | log_error("Failed to register match: %s", error.message); | |
408 | dbus_error_free(&error); | |
ea430986 LP |
409 | bus_done(m); |
410 | return -ENOMEM; | |
411 | } | |
412 | ||
413 | if ((r = request_name(m)) < 0) { | |
414 | bus_done(m); | |
415 | return r; | |
416 | } | |
417 | ||
418 | log_debug("Successfully connected to D-Bus bus %s as %s", | |
419 | strnull((id = dbus_connection_get_server_id(m->bus))), | |
420 | strnull(dbus_bus_get_unique_name(m->bus))); | |
421 | dbus_free(id); | |
422 | ||
423 | m->request_bus_dispatch = true; | |
424 | ||
425 | return 0; | |
426 | } | |
427 | ||
428 | void bus_done(Manager *m) { | |
429 | assert(m); | |
430 | ||
431 | if (m->bus) { | |
432 | dbus_connection_close(m->bus); | |
433 | dbus_connection_unref(m->bus); | |
434 | m->bus = NULL; | |
435 | } | |
c1e1601e LP |
436 | |
437 | if (m->subscribed) { | |
438 | char *c; | |
439 | ||
440 | while ((c = set_steal_first(m->subscribed))) | |
441 | free(c); | |
442 | ||
443 | set_free(m->subscribed); | |
444 | m->subscribed = NULL; | |
445 | } | |
ea430986 LP |
446 | } |
447 | ||
448 | DBusHandlerResult bus_default_message_handler(Manager *m, DBusMessage *message, const char*introspection, const BusProperty *properties) { | |
449 | DBusError error; | |
450 | DBusMessage *reply = NULL; | |
451 | int r; | |
452 | ||
453 | assert(m); | |
454 | assert(message); | |
455 | ||
456 | dbus_error_init(&error); | |
457 | ||
458 | if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) { | |
459 | ||
460 | if (!(reply = dbus_message_new_method_return(message))) | |
461 | goto oom; | |
462 | ||
463 | if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) | |
464 | goto oom; | |
465 | ||
466 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) { | |
467 | const char *interface, *property; | |
468 | const BusProperty *p; | |
469 | ||
470 | if (!dbus_message_get_args( | |
471 | message, | |
472 | &error, | |
473 | DBUS_TYPE_STRING, &interface, | |
474 | DBUS_TYPE_STRING, &property, | |
475 | DBUS_TYPE_INVALID)) | |
476 | return bus_send_error_reply(m, message, &error, -EINVAL); | |
477 | ||
478 | for (p = properties; p->property; p++) | |
479 | if (streq(p->interface, interface) && streq(p->property, property)) | |
480 | break; | |
481 | ||
482 | if (p->property) { | |
483 | DBusMessageIter iter, sub; | |
484 | ||
485 | if (!(reply = dbus_message_new_method_return(message))) | |
486 | goto oom; | |
487 | ||
488 | dbus_message_iter_init_append(reply, &iter); | |
489 | ||
490 | if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub)) | |
491 | goto oom; | |
492 | ||
493 | if ((r = p->append(m, &sub, property, p->data)) < 0) { | |
494 | ||
495 | if (r == -ENOMEM) | |
496 | goto oom; | |
497 | ||
498 | dbus_message_unref(reply); | |
499 | return bus_send_error_reply(m, message, NULL, r); | |
500 | } | |
501 | ||
502 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
503 | goto oom; | |
504 | } | |
505 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) { | |
506 | const char *interface; | |
507 | const BusProperty *p; | |
508 | DBusMessageIter iter, sub, sub2, sub3; | |
509 | bool any = false; | |
510 | ||
511 | if (!dbus_message_get_args( | |
512 | message, | |
513 | &error, | |
514 | DBUS_TYPE_STRING, &interface, | |
515 | DBUS_TYPE_INVALID)) | |
516 | return bus_send_error_reply(m, message, &error, -EINVAL); | |
517 | ||
518 | if (!(reply = dbus_message_new_method_return(message))) | |
519 | goto oom; | |
520 | ||
521 | dbus_message_iter_init_append(reply, &iter); | |
522 | ||
523 | if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub)) | |
524 | goto oom; | |
525 | ||
526 | for (p = properties; p->property; p++) { | |
527 | if (!streq(p->interface, interface)) | |
528 | continue; | |
529 | ||
c401a1e0 | 530 | if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) || |
ea430986 LP |
531 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) || |
532 | !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3)) | |
533 | goto oom; | |
534 | ||
535 | if ((r = p->append(m, &sub3, p->property, p->data)) < 0) { | |
536 | ||
537 | if (r == -ENOMEM) | |
538 | goto oom; | |
539 | ||
540 | dbus_message_unref(reply); | |
541 | return bus_send_error_reply(m, message, NULL, r); | |
542 | } | |
543 | ||
544 | if (!dbus_message_iter_close_container(&sub2, &sub3) || | |
545 | !dbus_message_iter_close_container(&sub, &sub2)) | |
546 | goto oom; | |
547 | ||
548 | any = true; | |
549 | } | |
550 | ||
551 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
552 | goto oom; | |
553 | } | |
554 | ||
555 | if (reply) { | |
556 | if (!dbus_connection_send(m->bus, reply, NULL)) | |
557 | goto oom; | |
558 | ||
559 | dbus_message_unref(reply); | |
560 | return DBUS_HANDLER_RESULT_HANDLED; | |
561 | } | |
562 | ||
563 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
564 | ||
565 | oom: | |
566 | if (reply) | |
567 | dbus_message_unref(reply); | |
568 | ||
569 | dbus_error_free(&error); | |
570 | ||
571 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
572 | } | |
573 | ||
574 | ||
575 | ||
576 | static const char *error_to_dbus(int error) { | |
577 | ||
578 | switch(error) { | |
579 | ||
580 | case -EINVAL: | |
581 | return DBUS_ERROR_INVALID_ARGS; | |
582 | ||
583 | case -ENOMEM: | |
584 | return DBUS_ERROR_NO_MEMORY; | |
585 | ||
586 | case -EPERM: | |
587 | case -EACCES: | |
588 | return DBUS_ERROR_ACCESS_DENIED; | |
589 | ||
590 | case -ESRCH: | |
591 | return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN; | |
592 | ||
593 | case -ENOENT: | |
594 | return DBUS_ERROR_FILE_NOT_FOUND; | |
595 | ||
596 | case -EEXIST: | |
597 | return DBUS_ERROR_FILE_EXISTS; | |
598 | ||
599 | case -ETIMEDOUT: | |
600 | return DBUS_ERROR_TIMEOUT; | |
601 | ||
602 | case -EIO: | |
603 | return DBUS_ERROR_IO_ERROR; | |
604 | ||
605 | case -ENETRESET: | |
606 | case -ECONNABORTED: | |
607 | case -ECONNRESET: | |
608 | return DBUS_ERROR_DISCONNECTED; | |
609 | } | |
610 | ||
611 | return DBUS_ERROR_FAILED; | |
612 | } | |
613 | ||
614 | DBusHandlerResult bus_send_error_reply(Manager *m, DBusMessage *message, DBusError *bus_error, int error) { | |
615 | DBusMessage *reply = NULL; | |
616 | const char *name, *text; | |
617 | ||
618 | if (bus_error && dbus_error_is_set(bus_error)) { | |
619 | name = bus_error->name; | |
620 | text = bus_error->message; | |
621 | } else { | |
622 | name = error_to_dbus(error); | |
623 | text = strerror(-error); | |
624 | } | |
625 | ||
626 | if (!(reply = dbus_message_new_error(message, name, text))) | |
627 | goto oom; | |
628 | ||
629 | if (!dbus_connection_send(m->bus, reply, NULL)) | |
630 | goto oom; | |
631 | ||
632 | dbus_message_unref(reply); | |
633 | ||
634 | if (bus_error) | |
635 | dbus_error_free(bus_error); | |
636 | ||
637 | return DBUS_HANDLER_RESULT_HANDLED; | |
638 | ||
639 | oom: | |
640 | if (reply) | |
641 | dbus_message_unref(reply); | |
642 | ||
643 | if (bus_error) | |
644 | dbus_error_free(bus_error); | |
645 | ||
646 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
647 | } | |
648 | ||
649 | int bus_property_append_string(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
650 | const char *t = data; | |
651 | ||
652 | assert(m); | |
653 | assert(i); | |
654 | assert(property); | |
38131695 LP |
655 | |
656 | if (!t) | |
657 | t = ""; | |
ea430986 LP |
658 | |
659 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t)) | |
660 | return -ENOMEM; | |
661 | ||
662 | return 0; | |
663 | } | |
664 | ||
665 | int bus_property_append_strv(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
666 | DBusMessageIter sub; | |
667 | char **t = data; | |
668 | ||
669 | assert(m); | |
670 | assert(i); | |
671 | assert(property); | |
672 | ||
673 | if (!dbus_message_iter_open_container(i, DBUS_TYPE_ARRAY, "s", &sub)) | |
674 | return -ENOMEM; | |
675 | ||
676 | STRV_FOREACH(t, t) | |
677 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, t)) | |
678 | return -ENOMEM; | |
679 | ||
680 | if (!dbus_message_iter_close_container(i, &sub)) | |
681 | return -ENOMEM; | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | int bus_property_append_bool(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
687 | bool *b = data; | |
688 | dbus_bool_t db; | |
689 | ||
690 | assert(m); | |
691 | assert(i); | |
692 | assert(property); | |
693 | assert(b); | |
694 | ||
695 | db = *b; | |
696 | ||
697 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db)) | |
698 | return -ENOMEM; | |
699 | ||
700 | return 0; | |
701 | } | |
38131695 LP |
702 | |
703 | int bus_property_append_uint64(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
704 | assert(m); | |
705 | assert(i); | |
706 | assert(property); | |
707 | assert(data); | |
708 | ||
709 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data)) | |
710 | return -ENOMEM; | |
711 | ||
712 | return 0; | |
713 | } | |
714 | ||
715 | int bus_property_append_uint32(Manager *m, DBusMessageIter *i, const char *property, void *data) { | |
716 | assert(m); | |
717 | assert(i); | |
718 | assert(property); | |
719 | assert(data); | |
720 | ||
721 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data)) | |
722 | return -ENOMEM; | |
723 | ||
724 | return 0; | |
725 | } |