]>
Commit | Line | Data |
---|---|---|
d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
9a1ac7b9 LP |
2 | |
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 | ||
22 | #include <assert.h> | |
23 | #include <sys/socket.h> | |
24 | #include <errno.h> | |
25 | #include <unistd.h> | |
a8f11321 LP |
26 | #include <stdio.h> |
27 | #include <stdlib.h> | |
9a1ac7b9 | 28 | #include <dbus/dbus.h> |
bfebab7f | 29 | #include <string.h> |
3df5bf61 | 30 | #include <sys/epoll.h> |
9a1ac7b9 LP |
31 | |
32 | #include "log.h" | |
33 | #include "dbus-common.h" | |
b9978121 | 34 | #include "util.h" |
f6a6225e | 35 | #include "def.h" |
bfebab7f | 36 | #include "strv.h" |
9a1ac7b9 LP |
37 | |
38 | int bus_check_peercred(DBusConnection *c) { | |
39 | int fd; | |
40 | struct ucred ucred; | |
41 | socklen_t l; | |
42 | ||
43 | assert(c); | |
44 | ||
45 | assert_se(dbus_connection_get_unix_fd(c, &fd)); | |
46 | ||
47 | l = sizeof(struct ucred); | |
48 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l) < 0) { | |
49 | log_error("SO_PEERCRED failed: %m"); | |
50 | return -errno; | |
51 | } | |
52 | ||
53 | if (l != sizeof(struct ucred)) { | |
54 | log_error("SO_PEERCRED returned wrong size."); | |
55 | return -E2BIG; | |
56 | } | |
57 | ||
be81bfc4 | 58 | if (ucred.uid != 0 && ucred.uid != geteuid()) |
9a1ac7b9 LP |
59 | return -EPERM; |
60 | ||
61 | return 1; | |
62 | } | |
63 | ||
a8f11321 LP |
64 | static int sync_auth(DBusConnection *bus, DBusError *error) { |
65 | usec_t begin, tstamp; | |
9a1ac7b9 | 66 | |
a8f11321 | 67 | assert(bus); |
b9978121 | 68 | |
a8f11321 LP |
69 | /* This complexity should probably move into D-Bus itself: |
70 | * | |
71 | * https://bugs.freedesktop.org/show_bug.cgi?id=35189 */ | |
9a1ac7b9 | 72 | |
a8f11321 LP |
73 | begin = tstamp = now(CLOCK_MONOTONIC); |
74 | for (;;) { | |
9a1ac7b9 | 75 | |
f6a6225e | 76 | if (tstamp > begin + DEFAULT_TIMEOUT_USEC) |
a8f11321 | 77 | break; |
9a1ac7b9 | 78 | |
a8f11321 LP |
79 | if (dbus_connection_get_is_authenticated(bus)) |
80 | break; | |
f4579ce7 | 81 | |
f6a6225e | 82 | if (!dbus_connection_read_write_dispatch(bus, ((begin + DEFAULT_TIMEOUT_USEC - tstamp) + USEC_PER_MSEC - 1) / USEC_PER_MSEC)) |
a8f11321 | 83 | break; |
b9978121 | 84 | |
a8f11321 LP |
85 | tstamp = now(CLOCK_MONOTONIC); |
86 | } | |
b9978121 | 87 | |
a8f11321 LP |
88 | if (!dbus_connection_get_is_connected(bus)) { |
89 | dbus_set_error_const(error, DBUS_ERROR_NO_SERVER, "Connection terminated during authentication."); | |
90 | return -ECONNREFUSED; | |
91 | } | |
b9978121 | 92 | |
a8f11321 LP |
93 | if (!dbus_connection_get_is_authenticated(bus)) { |
94 | dbus_set_error_const(error, DBUS_ERROR_TIMEOUT, "Failed to authenticate in time."); | |
95 | return -EACCES; | |
96 | } | |
b9978121 | 97 | |
a8f11321 LP |
98 | return 0; |
99 | } | |
b9978121 | 100 | |
be81bfc4 LP |
101 | int bus_connect(DBusBusType t, DBusConnection **_bus, bool *_private, DBusError *error) { |
102 | DBusConnection *bus = NULL; | |
a8f11321 | 103 | int r; |
be81bfc4 | 104 | bool private = true; |
b9978121 | 105 | |
a8f11321 | 106 | assert(_bus); |
b9978121 | 107 | |
a8f11321 | 108 | if (geteuid() == 0 && t == DBUS_BUS_SYSTEM) { |
be81bfc4 LP |
109 | /* If we are root, then let's talk directly to the |
110 | * system instance, instead of going via the bus */ | |
111 | ||
112 | bus = dbus_connection_open_private("unix:path=/run/systemd/private", error); | |
113 | if (!bus) | |
114 | return -EIO; | |
115 | ||
116 | } else { | |
117 | if (t == DBUS_BUS_SESSION) { | |
118 | const char *e; | |
91b22f21 | 119 | |
be81bfc4 LP |
120 | /* If we are supposed to talk to the instance, |
121 | * try via XDG_RUNTIME_DIR first, then | |
122 | * fallback to normal bus access */ | |
123 | ||
124 | e = getenv("XDG_RUNTIME_DIR"); | |
125 | if (e) { | |
126 | char *p; | |
127 | ||
128 | if (asprintf(&p, "unix:path=%s/systemd/private", e) < 0) | |
129 | return -ENOMEM; | |
130 | ||
131 | bus = dbus_connection_open_private(p, NULL); | |
132 | free(p); | |
133 | } | |
134 | } | |
91b22f21 | 135 | |
be81bfc4 LP |
136 | if (!bus) { |
137 | bus = dbus_bus_get_private(t, error); | |
138 | if (!bus) | |
91b22f21 | 139 | return -EIO; |
be81bfc4 LP |
140 | |
141 | private = false; | |
91b22f21 | 142 | } |
be81bfc4 | 143 | } |
a8f11321 | 144 | |
be81bfc4 | 145 | dbus_connection_set_exit_on_disconnect(bus, FALSE); |
a8f11321 | 146 | |
be81bfc4 | 147 | if (private) { |
a8f11321 | 148 | if (bus_check_peercred(bus) < 0) { |
b9978121 LP |
149 | dbus_connection_close(bus); |
150 | dbus_connection_unref(bus); | |
151 | ||
a8f11321 | 152 | dbus_set_error_const(error, DBUS_ERROR_ACCESS_DENIED, "Failed to verify owner of bus."); |
b9978121 LP |
153 | return -EACCES; |
154 | } | |
9a1ac7b9 LP |
155 | } |
156 | ||
be81bfc4 LP |
157 | r = sync_auth(bus, error); |
158 | if (r < 0) { | |
a8f11321 LP |
159 | dbus_connection_close(bus); |
160 | dbus_connection_unref(bus); | |
161 | return r; | |
162 | } | |
163 | ||
be81bfc4 LP |
164 | if (_private) |
165 | *_private = private; | |
166 | ||
a8f11321 LP |
167 | *_bus = bus; |
168 | return 0; | |
169 | } | |
170 | ||
171 | int bus_connect_system_ssh(const char *user, const char *host, DBusConnection **_bus, DBusError *error) { | |
172 | DBusConnection *bus; | |
173 | char *p = NULL; | |
174 | int r; | |
175 | ||
176 | assert(_bus); | |
177 | assert(user || host); | |
178 | ||
179 | if (user && host) | |
180 | asprintf(&p, "exec:path=ssh,argv1=-xT,argv2=%s@%s,argv3=systemd-stdio-bridge", user, host); | |
181 | else if (user) | |
182 | asprintf(&p, "exec:path=ssh,argv1=-xT,argv2=%s@localhost,argv3=systemd-stdio-bridge", user); | |
183 | else if (host) | |
184 | asprintf(&p, "exec:path=ssh,argv1=-xT,argv2=%s,argv3=systemd-stdio-bridge", host); | |
185 | ||
186 | if (!p) { | |
187 | dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, NULL); | |
188 | return -ENOMEM; | |
189 | } | |
190 | ||
191 | bus = dbus_connection_open_private(p, error); | |
192 | free(p); | |
193 | ||
194 | if (!bus) | |
195 | return -EIO; | |
196 | ||
197 | dbus_connection_set_exit_on_disconnect(bus, FALSE); | |
198 | ||
199 | if ((r = sync_auth(bus, error)) < 0) { | |
200 | dbus_connection_close(bus); | |
201 | dbus_connection_unref(bus); | |
202 | return r; | |
203 | } | |
204 | ||
205 | if (!dbus_bus_register(bus, error)) { | |
206 | dbus_connection_close(bus); | |
207 | dbus_connection_unref(bus); | |
208 | return r; | |
209 | } | |
210 | ||
211 | *_bus = bus; | |
212 | return 0; | |
213 | } | |
214 | ||
215 | int bus_connect_system_polkit(DBusConnection **_bus, DBusError *error) { | |
216 | DBusConnection *bus; | |
217 | int r; | |
218 | ||
219 | assert(_bus); | |
220 | ||
221 | /* Don't bother with PolicyKit if we are root */ | |
222 | if (geteuid() == 0) | |
223 | return bus_connect(DBUS_BUS_SYSTEM, _bus, NULL, error); | |
224 | ||
225 | if (!(bus = dbus_connection_open_private("exec:path=pkexec,argv1=" SYSTEMD_STDIO_BRIDGE_BINARY_PATH, error))) | |
226 | return -EIO; | |
227 | ||
9a1ac7b9 LP |
228 | dbus_connection_set_exit_on_disconnect(bus, FALSE); |
229 | ||
a8f11321 LP |
230 | if ((r = sync_auth(bus, error)) < 0) { |
231 | dbus_connection_close(bus); | |
232 | dbus_connection_unref(bus); | |
233 | return r; | |
234 | } | |
235 | ||
236 | if (!dbus_bus_register(bus, error)) { | |
237 | dbus_connection_close(bus); | |
238 | dbus_connection_unref(bus); | |
239 | return r; | |
240 | } | |
241 | ||
9a1ac7b9 LP |
242 | *_bus = bus; |
243 | return 0; | |
244 | } | |
4cf5d675 LP |
245 | |
246 | const char *bus_error_message(const DBusError *error) { | |
247 | assert(error); | |
248 | ||
249 | /* Sometimes the D-Bus server is a little bit too verbose with | |
250 | * its error messages, so let's override them here */ | |
251 | if (dbus_error_has_name(error, DBUS_ERROR_ACCESS_DENIED)) | |
252 | return "Access denied"; | |
253 | ||
254 | return error->message; | |
255 | } | |
bfebab7f LP |
256 | |
257 | DBusHandlerResult bus_default_message_handler( | |
258 | DBusConnection *c, | |
259 | DBusMessage *message, | |
260 | const char *introspection, | |
261 | const char *interfaces, | |
262 | const BusProperty *properties) { | |
263 | ||
264 | DBusError error; | |
265 | DBusMessage *reply = NULL; | |
266 | int r; | |
267 | ||
268 | assert(c); | |
269 | assert(message); | |
270 | ||
271 | dbus_error_init(&error); | |
272 | ||
273 | if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect") && introspection) { | |
274 | ||
275 | if (!(reply = dbus_message_new_method_return(message))) | |
276 | goto oom; | |
277 | ||
278 | if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) | |
279 | goto oom; | |
280 | ||
281 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && properties) { | |
282 | const char *interface, *property; | |
283 | const BusProperty *p; | |
284 | ||
285 | if (!dbus_message_get_args( | |
286 | message, | |
287 | &error, | |
288 | DBUS_TYPE_STRING, &interface, | |
289 | DBUS_TYPE_STRING, &property, | |
290 | DBUS_TYPE_INVALID)) | |
291 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
292 | ||
293 | for (p = properties; p->property; p++) | |
294 | if (streq(p->interface, interface) && streq(p->property, property)) | |
295 | break; | |
296 | ||
297 | if (p->property) { | |
298 | DBusMessageIter iter, sub; | |
299 | ||
300 | if (!(reply = dbus_message_new_method_return(message))) | |
301 | goto oom; | |
302 | ||
303 | dbus_message_iter_init_append(reply, &iter); | |
304 | ||
305 | if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub)) | |
306 | goto oom; | |
307 | ||
308 | if ((r = p->append(&sub, property, (void*) p->data)) < 0) { | |
309 | ||
310 | if (r == -ENOMEM) | |
311 | goto oom; | |
312 | ||
313 | dbus_message_unref(reply); | |
314 | return bus_send_error_reply(c, message, NULL, r); | |
315 | } | |
316 | ||
317 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
318 | goto oom; | |
319 | } else { | |
320 | if (!nulstr_contains(interfaces, interface)) | |
321 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
322 | else | |
323 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_PROPERTY, "Unknown property"); | |
324 | ||
325 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
326 | } | |
327 | ||
328 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && properties) { | |
329 | const char *interface; | |
330 | const BusProperty *p; | |
331 | DBusMessageIter iter, sub, sub2, sub3; | |
332 | ||
333 | if (!dbus_message_get_args( | |
334 | message, | |
335 | &error, | |
336 | DBUS_TYPE_STRING, &interface, | |
337 | DBUS_TYPE_INVALID)) | |
338 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
339 | ||
340 | if (interface[0] && !nulstr_contains(interfaces, interface)) { | |
341 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
342 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
343 | } | |
344 | ||
345 | if (!(reply = dbus_message_new_method_return(message))) | |
346 | goto oom; | |
347 | ||
348 | dbus_message_iter_init_append(reply, &iter); | |
349 | ||
350 | if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub)) | |
351 | goto oom; | |
352 | ||
353 | for (p = properties; p->property; p++) { | |
354 | if (interface[0] && !streq(p->interface, interface)) | |
355 | continue; | |
356 | ||
357 | if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) || | |
358 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) || | |
359 | !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3)) | |
360 | goto oom; | |
361 | ||
362 | if ((r = p->append(&sub3, p->property, (void*) p->data)) < 0) { | |
363 | ||
364 | if (r == -ENOMEM) | |
365 | goto oom; | |
366 | ||
367 | dbus_message_unref(reply); | |
368 | return bus_send_error_reply(c, message, NULL, r); | |
369 | } | |
370 | ||
371 | if (!dbus_message_iter_close_container(&sub2, &sub3) || | |
372 | !dbus_message_iter_close_container(&sub, &sub2)) | |
373 | goto oom; | |
374 | } | |
375 | ||
376 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
377 | goto oom; | |
378 | ||
379 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Set") && properties) { | |
380 | const char *interface, *property; | |
381 | DBusMessageIter iter; | |
382 | const BusProperty *p; | |
383 | ||
384 | if (!dbus_message_iter_init(message, &iter) || | |
385 | dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) | |
386 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
387 | ||
388 | dbus_message_iter_get_basic(&iter, &interface); | |
389 | ||
390 | if (!dbus_message_iter_next(&iter) || | |
391 | dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) | |
392 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
393 | ||
394 | dbus_message_iter_get_basic(&iter, &property); | |
395 | ||
396 | if (!dbus_message_iter_next(&iter) || | |
397 | dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT || | |
398 | dbus_message_iter_has_next(&iter)) | |
399 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
400 | ||
401 | for (p = properties; p->property; p++) | |
402 | if (streq(p->interface, interface) && streq(p->property, property)) | |
403 | break; | |
404 | ||
405 | if (p->set) { | |
406 | DBusMessageIter sub; | |
407 | char *sig; | |
408 | ||
409 | dbus_message_iter_recurse(&iter, &sub); | |
410 | ||
411 | if (!(sig = dbus_message_iter_get_signature(&sub))) | |
412 | goto oom; | |
413 | ||
414 | if (!streq(sig, p->signature)) { | |
415 | dbus_free(sig); | |
416 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
417 | } | |
418 | ||
419 | dbus_free(sig); | |
420 | ||
421 | if ((r = p->set(&sub, property)) < 0) { | |
422 | if (r == -ENOMEM) | |
423 | goto oom; | |
424 | return bus_send_error_reply(c, message, NULL, r); | |
425 | } | |
426 | ||
427 | if (!(reply = dbus_message_new_method_return(message))) | |
428 | goto oom; | |
429 | } else { | |
430 | if (p->property) | |
431 | dbus_set_error_const(&error, DBUS_ERROR_PROPERTY_READ_ONLY, "Property read-only"); | |
432 | else if (!nulstr_contains(interfaces, interface)) | |
433 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
434 | else | |
435 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_PROPERTY, "Unknown property"); | |
436 | ||
437 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
438 | } | |
439 | ||
cda2b84a MS |
440 | } else { |
441 | const char *interface = dbus_message_get_interface(message); | |
442 | ||
443 | if (!interface || !nulstr_contains(interfaces, interface)) { | |
444 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
445 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
446 | } | |
bfebab7f LP |
447 | } |
448 | ||
449 | if (reply) { | |
450 | if (!dbus_connection_send(c, reply, NULL)) | |
451 | goto oom; | |
452 | ||
453 | dbus_message_unref(reply); | |
454 | return DBUS_HANDLER_RESULT_HANDLED; | |
455 | } | |
456 | ||
457 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
458 | ||
459 | oom: | |
460 | if (reply) | |
461 | dbus_message_unref(reply); | |
462 | ||
463 | dbus_error_free(&error); | |
464 | ||
465 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
466 | } | |
467 | ||
468 | int bus_property_append_string(DBusMessageIter *i, const char *property, void *data) { | |
469 | const char *t = data; | |
470 | ||
471 | assert(i); | |
472 | assert(property); | |
473 | ||
474 | if (!t) | |
475 | t = ""; | |
476 | ||
477 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t)) | |
478 | return -ENOMEM; | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | int bus_property_append_strv(DBusMessageIter *i, const char *property, void *data) { | |
bfebab7f LP |
484 | char **t = data; |
485 | ||
486 | assert(i); | |
487 | assert(property); | |
488 | ||
98a28fef | 489 | return bus_append_strv_iter(i, t); |
bfebab7f LP |
490 | } |
491 | ||
492 | int bus_property_append_bool(DBusMessageIter *i, const char *property, void *data) { | |
493 | bool *b = data; | |
494 | dbus_bool_t db; | |
495 | ||
496 | assert(i); | |
497 | assert(property); | |
498 | assert(b); | |
499 | ||
500 | db = *b; | |
501 | ||
502 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db)) | |
503 | return -ENOMEM; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | int bus_property_append_uint64(DBusMessageIter *i, const char *property, void *data) { | |
509 | assert(i); | |
510 | assert(property); | |
511 | assert(data); | |
512 | ||
bd253d1b | 513 | /* Let's ensure that usec_t is actually 64bit, and hence this |
bfebab7f LP |
514 | * function can be used for usec_t */ |
515 | assert_cc(sizeof(uint64_t) == sizeof(usec_t)); | |
516 | ||
517 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data)) | |
518 | return -ENOMEM; | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | int bus_property_append_uint32(DBusMessageIter *i, const char *property, void *data) { | |
524 | assert(i); | |
525 | assert(property); | |
526 | assert(data); | |
527 | ||
bd253d1b LP |
528 | /* Let's ensure that pid_t, mode_t, uid_t, gid_t are actually |
529 | * 32bit, and hence this function can be used for | |
530 | * pid_t/mode_t/uid_t/gid_t */ | |
bfebab7f LP |
531 | assert_cc(sizeof(uint32_t) == sizeof(pid_t)); |
532 | assert_cc(sizeof(uint32_t) == sizeof(mode_t)); | |
533 | assert_cc(sizeof(uint32_t) == sizeof(unsigned)); | |
bd253d1b LP |
534 | assert_cc(sizeof(uint32_t) == sizeof(uid_t)); |
535 | assert_cc(sizeof(uint32_t) == sizeof(gid_t)); | |
bfebab7f LP |
536 | |
537 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data)) | |
538 | return -ENOMEM; | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | int bus_property_append_int32(DBusMessageIter *i, const char *property, void *data) { | |
544 | assert(i); | |
545 | assert(property); | |
546 | assert(data); | |
547 | ||
548 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
549 | ||
550 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data)) | |
551 | return -ENOMEM; | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
556 | int bus_property_append_size(DBusMessageIter *i, const char *property, void *data) { | |
557 | uint64_t u; | |
558 | ||
559 | assert(i); | |
560 | assert(property); | |
561 | assert(data); | |
562 | ||
563 | u = (uint64_t) *(size_t*) data; | |
564 | ||
565 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
566 | return -ENOMEM; | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | int bus_property_append_ul(DBusMessageIter *i, const char *property, void *data) { | |
572 | uint64_t u; | |
573 | ||
574 | assert(i); | |
575 | assert(property); | |
576 | assert(data); | |
577 | ||
578 | u = (uint64_t) *(unsigned long*) data; | |
579 | ||
580 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
581 | return -ENOMEM; | |
916abb21 LP |
582 | |
583 | return 0; | |
584 | } | |
585 | ||
586 | int bus_property_append_long(DBusMessageIter *i, const char *property, void *data) { | |
572481b9 | 587 | int64_t l; |
916abb21 LP |
588 | |
589 | assert(i); | |
590 | assert(property); | |
591 | assert(data); | |
592 | ||
572481b9 | 593 | l = (int64_t) *(long*) data; |
916abb21 | 594 | |
572481b9 | 595 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT64, &l)) |
916abb21 | 596 | return -ENOMEM; |
bfebab7f LP |
597 | |
598 | return 0; | |
599 | } | |
600 | ||
601 | const char *bus_errno_to_dbus(int error) { | |
602 | ||
603 | switch(error) { | |
604 | ||
605 | case -EINVAL: | |
606 | return DBUS_ERROR_INVALID_ARGS; | |
607 | ||
608 | case -ENOMEM: | |
609 | return DBUS_ERROR_NO_MEMORY; | |
610 | ||
611 | case -EPERM: | |
612 | case -EACCES: | |
613 | return DBUS_ERROR_ACCESS_DENIED; | |
614 | ||
615 | case -ESRCH: | |
616 | return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN; | |
617 | ||
618 | case -ENOENT: | |
619 | return DBUS_ERROR_FILE_NOT_FOUND; | |
620 | ||
621 | case -EEXIST: | |
622 | return DBUS_ERROR_FILE_EXISTS; | |
623 | ||
624 | case -ETIMEDOUT: | |
625 | case -ETIME: | |
626 | return DBUS_ERROR_TIMEOUT; | |
627 | ||
628 | case -EIO: | |
629 | return DBUS_ERROR_IO_ERROR; | |
630 | ||
631 | case -ENETRESET: | |
632 | case -ECONNABORTED: | |
633 | case -ECONNRESET: | |
634 | return DBUS_ERROR_DISCONNECTED; | |
635 | } | |
636 | ||
637 | return DBUS_ERROR_FAILED; | |
638 | } | |
639 | ||
640 | DBusHandlerResult bus_send_error_reply(DBusConnection *c, DBusMessage *message, DBusError *berror, int error) { | |
641 | DBusMessage *reply = NULL; | |
642 | const char *name, *text; | |
643 | ||
644 | if (berror && dbus_error_is_set(berror)) { | |
645 | name = berror->name; | |
646 | text = berror->message; | |
647 | } else { | |
648 | name = bus_errno_to_dbus(error); | |
649 | text = strerror(-error); | |
650 | } | |
651 | ||
652 | if (!(reply = dbus_message_new_error(message, name, text))) | |
653 | goto oom; | |
654 | ||
655 | if (!dbus_connection_send(c, reply, NULL)) | |
656 | goto oom; | |
657 | ||
658 | dbus_message_unref(reply); | |
659 | ||
660 | if (berror) | |
661 | dbus_error_free(berror); | |
662 | ||
663 | return DBUS_HANDLER_RESULT_HANDLED; | |
664 | ||
665 | oom: | |
666 | if (reply) | |
667 | dbus_message_unref(reply); | |
668 | ||
669 | if (berror) | |
670 | dbus_error_free(berror); | |
671 | ||
672 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
673 | } | |
674 | ||
675 | DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties) { | |
676 | DBusMessage *m; | |
677 | DBusMessageIter iter, sub; | |
678 | const char *i; | |
679 | ||
680 | assert(interface); | |
681 | assert(properties); | |
682 | ||
683 | if (!(m = dbus_message_new_signal(path, "org.freedesktop.DBus.Properties", "PropertiesChanged"))) | |
684 | goto oom; | |
685 | ||
686 | dbus_message_iter_init_append(m, &iter); | |
687 | ||
688 | /* We won't send any property values, since they might be | |
689 | * large and sometimes not cheap to generated */ | |
690 | ||
691 | if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) || | |
692 | !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub) || | |
693 | !dbus_message_iter_close_container(&iter, &sub) || | |
694 | !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) | |
695 | goto oom; | |
696 | ||
697 | NULSTR_FOREACH(i, properties) | |
698 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &i)) | |
699 | goto oom; | |
700 | ||
701 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
702 | goto oom; | |
703 | ||
704 | return m; | |
705 | ||
706 | oom: | |
707 | if (m) | |
708 | dbus_message_unref(m); | |
709 | ||
710 | return NULL; | |
711 | } | |
3df5bf61 LP |
712 | |
713 | uint32_t bus_flags_to_events(DBusWatch *bus_watch) { | |
714 | unsigned flags; | |
715 | uint32_t events = 0; | |
716 | ||
717 | assert(bus_watch); | |
718 | ||
719 | /* no watch flags for disabled watches */ | |
720 | if (!dbus_watch_get_enabled(bus_watch)) | |
721 | return 0; | |
722 | ||
723 | flags = dbus_watch_get_flags(bus_watch); | |
724 | ||
725 | if (flags & DBUS_WATCH_READABLE) | |
726 | events |= EPOLLIN; | |
727 | if (flags & DBUS_WATCH_WRITABLE) | |
728 | events |= EPOLLOUT; | |
729 | ||
730 | return events | EPOLLHUP | EPOLLERR; | |
731 | } | |
732 | ||
733 | unsigned bus_events_to_flags(uint32_t events) { | |
734 | unsigned flags = 0; | |
735 | ||
736 | if (events & EPOLLIN) | |
737 | flags |= DBUS_WATCH_READABLE; | |
738 | if (events & EPOLLOUT) | |
739 | flags |= DBUS_WATCH_WRITABLE; | |
740 | if (events & EPOLLHUP) | |
741 | flags |= DBUS_WATCH_HANGUP; | |
742 | if (events & EPOLLERR) | |
743 | flags |= DBUS_WATCH_ERROR; | |
744 | ||
745 | return flags; | |
746 | } | |
8d0e38a2 LP |
747 | |
748 | int bus_parse_strv(DBusMessage *m, char ***_l) { | |
749 | DBusMessageIter iter; | |
750 | ||
751 | assert(m); | |
752 | assert(_l); | |
753 | ||
754 | if (!dbus_message_iter_init(m, &iter)) | |
755 | return -EINVAL; | |
756 | ||
757 | return bus_parse_strv_iter(&iter, _l); | |
758 | } | |
759 | ||
760 | int bus_parse_strv_iter(DBusMessageIter *iter, char ***_l) { | |
761 | DBusMessageIter sub; | |
762 | unsigned n = 0, i = 0; | |
763 | char **l; | |
764 | ||
765 | assert(iter); | |
766 | assert(_l); | |
767 | ||
768 | if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY || | |
769 | dbus_message_iter_get_element_type(iter) != DBUS_TYPE_STRING) | |
770 | return -EINVAL; | |
771 | ||
772 | dbus_message_iter_recurse(iter, &sub); | |
773 | ||
774 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
775 | n++; | |
776 | dbus_message_iter_next(&sub); | |
777 | } | |
778 | ||
779 | if (!(l = new(char*, n+1))) | |
780 | return -ENOMEM; | |
781 | ||
782 | dbus_message_iter_recurse(iter, &sub); | |
783 | ||
784 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
785 | const char *s; | |
786 | ||
787 | assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING); | |
788 | dbus_message_iter_get_basic(&sub, &s); | |
789 | ||
790 | if (!(l[i++] = strdup(s))) { | |
791 | strv_free(l); | |
792 | return -ENOMEM; | |
793 | } | |
794 | ||
795 | dbus_message_iter_next(&sub); | |
796 | } | |
797 | ||
798 | assert(i == n); | |
799 | l[i] = NULL; | |
800 | ||
801 | if (_l) | |
802 | *_l = l; | |
803 | ||
804 | return 0; | |
805 | } | |
98a28fef LP |
806 | |
807 | int bus_append_strv_iter(DBusMessageIter *iter, char **l) { | |
808 | DBusMessageIter sub; | |
809 | ||
810 | assert(iter); | |
811 | ||
812 | if (!dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, "s", &sub)) | |
813 | return -ENOMEM; | |
814 | ||
815 | STRV_FOREACH(l, l) | |
816 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, l)) | |
817 | return -ENOMEM; | |
818 | ||
819 | if (!dbus_message_iter_close_container(iter, &sub)) | |
820 | return -ENOMEM; | |
821 | ||
822 | return 0; | |
823 | } | |
abca4822 LP |
824 | |
825 | int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) { | |
826 | ||
827 | assert(iter); | |
828 | assert(data); | |
829 | ||
830 | if (dbus_message_iter_get_arg_type(iter) != type) | |
831 | return -EIO; | |
832 | ||
833 | dbus_message_iter_get_basic(iter, data); | |
834 | ||
835 | if (!dbus_message_iter_next(iter) != !next) | |
836 | return -EIO; | |
837 | ||
838 | return 0; | |
839 | } | |
a4c279f8 LP |
840 | |
841 | int generic_print_property(const char *name, DBusMessageIter *iter, bool all) { | |
842 | assert(name); | |
843 | assert(iter); | |
844 | ||
845 | switch (dbus_message_iter_get_arg_type(iter)) { | |
846 | ||
847 | case DBUS_TYPE_STRING: { | |
848 | const char *s; | |
849 | dbus_message_iter_get_basic(iter, &s); | |
850 | ||
851 | if (all || !isempty(s)) | |
852 | printf("%s=%s\n", name, s); | |
853 | ||
854 | return 1; | |
855 | } | |
856 | ||
857 | case DBUS_TYPE_BOOLEAN: { | |
858 | dbus_bool_t b; | |
859 | ||
860 | dbus_message_iter_get_basic(iter, &b); | |
861 | printf("%s=%s\n", name, yes_no(b)); | |
862 | ||
863 | return 1; | |
864 | } | |
865 | ||
866 | case DBUS_TYPE_UINT64: { | |
867 | uint64_t u; | |
868 | dbus_message_iter_get_basic(iter, &u); | |
869 | ||
870 | /* Yes, heuristics! But we can change this check | |
871 | * should it turn out to not be sufficient */ | |
872 | ||
873 | if (endswith(name, "Timestamp")) { | |
874 | char timestamp[FORMAT_TIMESTAMP_MAX], *t; | |
875 | ||
876 | t = format_timestamp(timestamp, sizeof(timestamp), u); | |
877 | if (t || all) | |
878 | printf("%s=%s\n", name, strempty(t)); | |
879 | ||
880 | } else if (strstr(name, "USec")) { | |
881 | char timespan[FORMAT_TIMESPAN_MAX]; | |
882 | ||
883 | printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u)); | |
884 | } else | |
885 | printf("%s=%llu\n", name, (unsigned long long) u); | |
886 | ||
887 | return 1; | |
888 | } | |
889 | ||
890 | case DBUS_TYPE_UINT32: { | |
891 | uint32_t u; | |
892 | dbus_message_iter_get_basic(iter, &u); | |
893 | ||
894 | if (strstr(name, "UMask") || strstr(name, "Mode")) | |
895 | printf("%s=%04o\n", name, u); | |
896 | else | |
897 | printf("%s=%u\n", name, (unsigned) u); | |
898 | ||
899 | return 1; | |
900 | } | |
901 | ||
902 | case DBUS_TYPE_INT32: { | |
903 | int32_t i; | |
904 | dbus_message_iter_get_basic(iter, &i); | |
905 | ||
906 | printf("%s=%i\n", name, (int) i); | |
907 | return 1; | |
908 | } | |
909 | ||
910 | case DBUS_TYPE_DOUBLE: { | |
911 | double d; | |
912 | dbus_message_iter_get_basic(iter, &d); | |
913 | ||
914 | printf("%s=%g\n", name, d); | |
915 | return 1; | |
916 | } | |
917 | ||
918 | case DBUS_TYPE_ARRAY: | |
919 | ||
920 | if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) { | |
921 | DBusMessageIter sub; | |
922 | bool space = false; | |
923 | ||
924 | dbus_message_iter_recurse(iter, &sub); | |
925 | if (all || | |
926 | dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
927 | printf("%s=", name); | |
928 | ||
929 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
930 | const char *s; | |
931 | ||
932 | assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING); | |
933 | dbus_message_iter_get_basic(&sub, &s); | |
934 | printf("%s%s", space ? " " : "", s); | |
935 | ||
936 | space = true; | |
937 | dbus_message_iter_next(&sub); | |
938 | } | |
939 | ||
940 | puts(""); | |
941 | } | |
942 | ||
943 | return 1; | |
944 | ||
945 | } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) { | |
946 | DBusMessageIter sub; | |
947 | ||
948 | dbus_message_iter_recurse(iter, &sub); | |
949 | if (all || | |
950 | dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
951 | printf("%s=", name); | |
952 | ||
953 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
954 | uint8_t u; | |
955 | ||
956 | assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE); | |
957 | dbus_message_iter_get_basic(&sub, &u); | |
958 | printf("%02x", u); | |
959 | ||
960 | dbus_message_iter_next(&sub); | |
961 | } | |
962 | ||
963 | puts(""); | |
964 | } | |
965 | ||
966 | return 1; | |
967 | } | |
968 | ||
969 | break; | |
970 | } | |
971 | ||
972 | return 0; | |
973 | } | |
ad740100 LP |
974 | |
975 | static void release_name_pending_cb(DBusPendingCall *pending, void *userdata) { | |
976 | DBusMessage *reply; | |
977 | DBusConnection *bus = userdata; | |
978 | ||
979 | assert_se(reply = dbus_pending_call_steal_reply(pending)); | |
980 | dbus_message_unref(reply); | |
981 | ||
982 | dbus_connection_close(bus); | |
983 | } | |
984 | ||
985 | void bus_async_unregister_and_exit(DBusConnection *bus, const char *name) { | |
986 | DBusMessage *m = NULL; | |
987 | DBusPendingCall *pending = NULL; | |
988 | ||
989 | assert(bus); | |
990 | ||
991 | /* We unregister the name here, but we continue to process | |
992 | * requests, until we get the response for it, so that all | |
993 | * requests are guaranteed to be processed. */ | |
994 | ||
995 | m = dbus_message_new_method_call( | |
996 | DBUS_SERVICE_DBUS, | |
997 | DBUS_PATH_DBUS, | |
998 | DBUS_INTERFACE_DBUS, | |
999 | "ReleaseName"); | |
1000 | if (!m) | |
1001 | goto oom; | |
1002 | ||
1003 | if (!dbus_message_append_args( | |
1004 | m, | |
1005 | DBUS_TYPE_STRING, | |
1006 | &name, | |
1007 | DBUS_TYPE_INVALID)) | |
1008 | goto oom; | |
1009 | ||
1010 | if (!dbus_connection_send_with_reply(bus, m, &pending, -1)) | |
1011 | goto oom; | |
1012 | ||
1013 | if (!dbus_pending_call_set_notify(pending, release_name_pending_cb, bus, NULL)) | |
1014 | goto oom; | |
1015 | ||
1016 | dbus_message_unref(m); | |
1017 | dbus_pending_call_unref(pending); | |
1018 | ||
1019 | return; | |
1020 | ||
1021 | oom: | |
1022 | log_error("Out of memory"); | |
1023 | ||
1024 | if (pending) { | |
1025 | dbus_pending_call_cancel(pending); | |
1026 | dbus_pending_call_unref(pending); | |
1027 | } | |
1028 | ||
1029 | if (m) | |
1030 | dbus_message_unref(m); | |
1031 | } | |
1032 | ||
1033 | DBusHandlerResult bus_exit_idle_filter(DBusConnection *bus, DBusMessage *m, void *userdata) { | |
1034 | usec_t *remain_until = userdata; | |
1035 | ||
1036 | assert(bus); | |
1037 | assert(m); | |
1038 | assert(remain_until); | |
1039 | ||
1040 | /* Everytime we get a new message we reset out timeout */ | |
1041 | *remain_until = now(CLOCK_MONOTONIC) + DEFAULT_EXIT_USEC; | |
1042 | ||
1043 | if (dbus_message_is_signal(m, DBUS_INTERFACE_LOCAL, "Disconnected")) | |
1044 | dbus_connection_close(bus); | |
1045 | ||
1046 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
1047 | } |