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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, | |
d200735e | 262 | const BusBoundProperties *bound_properties) { |
bfebab7f LP |
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 | ||
d200735e | 281 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Get") && bound_properties) { |
bfebab7f | 282 | const char *interface, *property; |
d200735e | 283 | const BusBoundProperties *bp; |
bfebab7f | 284 | const BusProperty *p; |
d200735e MS |
285 | void *data; |
286 | DBusMessageIter iter, sub; | |
bfebab7f LP |
287 | |
288 | if (!dbus_message_get_args( | |
289 | message, | |
290 | &error, | |
291 | DBUS_TYPE_STRING, &interface, | |
292 | DBUS_TYPE_STRING, &property, | |
293 | DBUS_TYPE_INVALID)) | |
294 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
295 | ||
d200735e MS |
296 | for (bp = bound_properties; bp->interface; bp++) { |
297 | if (!streq(bp->interface, interface)) | |
298 | continue; | |
bfebab7f | 299 | |
d200735e MS |
300 | for (p = bp->properties; p->property; p++) |
301 | if (streq(p->property, property)) | |
302 | goto get_prop; | |
303 | } | |
bfebab7f | 304 | |
d200735e MS |
305 | /* no match */ |
306 | if (!nulstr_contains(interfaces, interface)) | |
307 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
308 | else | |
309 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_PROPERTY, "Unknown property"); | |
bfebab7f | 310 | |
d200735e | 311 | return bus_send_error_reply(c, message, &error, -EINVAL); |
bfebab7f | 312 | |
d200735e MS |
313 | get_prop: |
314 | reply = dbus_message_new_method_return(message); | |
315 | if (!reply) | |
316 | goto oom; | |
bfebab7f | 317 | |
d200735e | 318 | dbus_message_iter_init_append(reply, &iter); |
bfebab7f | 319 | |
d200735e MS |
320 | if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, p->signature, &sub)) |
321 | goto oom; | |
bfebab7f | 322 | |
d200735e MS |
323 | data = (char*)bp->base + p->offset; |
324 | if (p->indirect) | |
325 | data = *(void**)data; | |
326 | r = p->append(&sub, property, data); | |
327 | if (r < 0) { | |
328 | if (r == -ENOMEM) | |
bfebab7f | 329 | goto oom; |
bfebab7f | 330 | |
d200735e MS |
331 | dbus_message_unref(reply); |
332 | return bus_send_error_reply(c, message, NULL, r); | |
bfebab7f LP |
333 | } |
334 | ||
d200735e MS |
335 | if (!dbus_message_iter_close_container(&iter, &sub)) |
336 | goto oom; | |
337 | ||
338 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "GetAll") && bound_properties) { | |
bfebab7f | 339 | const char *interface; |
d200735e | 340 | const BusBoundProperties *bp; |
bfebab7f LP |
341 | const BusProperty *p; |
342 | DBusMessageIter iter, sub, sub2, sub3; | |
343 | ||
344 | if (!dbus_message_get_args( | |
345 | message, | |
346 | &error, | |
347 | DBUS_TYPE_STRING, &interface, | |
348 | DBUS_TYPE_INVALID)) | |
349 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
350 | ||
351 | if (interface[0] && !nulstr_contains(interfaces, interface)) { | |
352 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
353 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
354 | } | |
355 | ||
356 | if (!(reply = dbus_message_new_method_return(message))) | |
357 | goto oom; | |
358 | ||
359 | dbus_message_iter_init_append(reply, &iter); | |
360 | ||
361 | if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub)) | |
362 | goto oom; | |
363 | ||
d200735e MS |
364 | for (bp = bound_properties; bp->interface; bp++) { |
365 | if (interface[0] && !streq(bp->interface, interface)) | |
bfebab7f LP |
366 | continue; |
367 | ||
d200735e MS |
368 | for (p = bp->properties; p->property; p++) { |
369 | void *data; | |
bfebab7f | 370 | |
d200735e MS |
371 | if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY, NULL, &sub2) || |
372 | !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &p->property) || | |
373 | !dbus_message_iter_open_container(&sub2, DBUS_TYPE_VARIANT, p->signature, &sub3)) | |
bfebab7f LP |
374 | goto oom; |
375 | ||
d200735e MS |
376 | data = (char*)bp->base + p->offset; |
377 | if (p->indirect) | |
378 | data = *(void**)data; | |
379 | r = p->append(&sub3, p->property, data); | |
380 | if (r < 0) { | |
381 | if (r == -ENOMEM) | |
382 | goto oom; | |
bfebab7f | 383 | |
d200735e MS |
384 | dbus_message_unref(reply); |
385 | return bus_send_error_reply(c, message, NULL, r); | |
386 | } | |
387 | ||
388 | if (!dbus_message_iter_close_container(&sub2, &sub3) || | |
389 | !dbus_message_iter_close_container(&sub, &sub2)) | |
390 | goto oom; | |
391 | } | |
bfebab7f LP |
392 | } |
393 | ||
394 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
395 | goto oom; | |
396 | ||
d200735e | 397 | } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Properties", "Set") && bound_properties) { |
bfebab7f LP |
398 | const char *interface, *property; |
399 | DBusMessageIter iter; | |
d200735e | 400 | const BusBoundProperties *bp; |
bfebab7f | 401 | const BusProperty *p; |
d200735e MS |
402 | DBusMessageIter sub; |
403 | char *sig; | |
bfebab7f LP |
404 | |
405 | if (!dbus_message_iter_init(message, &iter) || | |
406 | dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) | |
407 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
408 | ||
409 | dbus_message_iter_get_basic(&iter, &interface); | |
410 | ||
411 | if (!dbus_message_iter_next(&iter) || | |
412 | dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) | |
413 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
414 | ||
415 | dbus_message_iter_get_basic(&iter, &property); | |
416 | ||
417 | if (!dbus_message_iter_next(&iter) || | |
418 | dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT || | |
419 | dbus_message_iter_has_next(&iter)) | |
420 | return bus_send_error_reply(c, message, NULL, -EINVAL); | |
421 | ||
d200735e MS |
422 | for (bp = bound_properties; bp->interface; bp++) { |
423 | if (!streq(bp->interface, interface)) | |
424 | continue; | |
425 | ||
426 | for (p = bp->properties; p->property; p++) | |
427 | if (streq(p->property, property)) | |
428 | goto set_prop; | |
429 | } | |
bfebab7f | 430 | |
d200735e MS |
431 | /* no match */ |
432 | 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"); | |
bfebab7f | 436 | |
d200735e | 437 | return bus_send_error_reply(c, message, &error, -EINVAL); |
bfebab7f | 438 | |
d200735e MS |
439 | set_prop: |
440 | if (!p->set) { | |
441 | dbus_set_error_const(&error, DBUS_ERROR_PROPERTY_READ_ONLY, "Property read-only"); | |
442 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
443 | } | |
bfebab7f | 444 | |
d200735e | 445 | dbus_message_iter_recurse(&iter, &sub); |
bfebab7f | 446 | |
d200735e MS |
447 | sig = dbus_message_iter_get_signature(&sub); |
448 | if (!sig) | |
449 | goto oom; | |
450 | ||
451 | if (!streq(sig, p->signature)) { | |
bfebab7f | 452 | dbus_free(sig); |
d200735e MS |
453 | return bus_send_error_reply(c, message, NULL, -EINVAL); |
454 | } | |
bfebab7f | 455 | |
d200735e | 456 | dbus_free(sig); |
bfebab7f | 457 | |
d200735e MS |
458 | r = p->set(&sub, property); |
459 | if (r < 0) { | |
460 | if (r == -ENOMEM) | |
bfebab7f | 461 | goto oom; |
d200735e | 462 | return bus_send_error_reply(c, message, NULL, r); |
bfebab7f LP |
463 | } |
464 | ||
d200735e MS |
465 | reply = dbus_message_new_method_return(message); |
466 | if (!reply) | |
467 | goto oom; | |
cda2b84a MS |
468 | } else { |
469 | const char *interface = dbus_message_get_interface(message); | |
470 | ||
471 | if (!interface || !nulstr_contains(interfaces, interface)) { | |
472 | dbus_set_error_const(&error, DBUS_ERROR_UNKNOWN_INTERFACE, "Unknown interface"); | |
473 | return bus_send_error_reply(c, message, &error, -EINVAL); | |
474 | } | |
bfebab7f LP |
475 | } |
476 | ||
477 | if (reply) { | |
478 | if (!dbus_connection_send(c, reply, NULL)) | |
479 | goto oom; | |
480 | ||
481 | dbus_message_unref(reply); | |
482 | return DBUS_HANDLER_RESULT_HANDLED; | |
483 | } | |
484 | ||
485 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
486 | ||
487 | oom: | |
488 | if (reply) | |
489 | dbus_message_unref(reply); | |
490 | ||
491 | dbus_error_free(&error); | |
492 | ||
493 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
494 | } | |
495 | ||
496 | int bus_property_append_string(DBusMessageIter *i, const char *property, void *data) { | |
497 | const char *t = data; | |
498 | ||
499 | assert(i); | |
500 | assert(property); | |
501 | ||
502 | if (!t) | |
503 | t = ""; | |
504 | ||
505 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_STRING, &t)) | |
506 | return -ENOMEM; | |
507 | ||
508 | return 0; | |
509 | } | |
510 | ||
511 | int bus_property_append_strv(DBusMessageIter *i, const char *property, void *data) { | |
bfebab7f LP |
512 | char **t = data; |
513 | ||
514 | assert(i); | |
515 | assert(property); | |
516 | ||
98a28fef | 517 | return bus_append_strv_iter(i, t); |
bfebab7f LP |
518 | } |
519 | ||
520 | int bus_property_append_bool(DBusMessageIter *i, const char *property, void *data) { | |
521 | bool *b = data; | |
522 | dbus_bool_t db; | |
523 | ||
524 | assert(i); | |
525 | assert(property); | |
526 | assert(b); | |
527 | ||
528 | db = *b; | |
529 | ||
530 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &db)) | |
531 | return -ENOMEM; | |
532 | ||
533 | return 0; | |
534 | } | |
535 | ||
536 | int bus_property_append_uint64(DBusMessageIter *i, const char *property, void *data) { | |
537 | assert(i); | |
538 | assert(property); | |
539 | assert(data); | |
540 | ||
bd253d1b | 541 | /* Let's ensure that usec_t is actually 64bit, and hence this |
bfebab7f LP |
542 | * function can be used for usec_t */ |
543 | assert_cc(sizeof(uint64_t) == sizeof(usec_t)); | |
544 | ||
545 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, data)) | |
546 | return -ENOMEM; | |
547 | ||
548 | return 0; | |
549 | } | |
550 | ||
551 | int bus_property_append_uint32(DBusMessageIter *i, const char *property, void *data) { | |
552 | assert(i); | |
553 | assert(property); | |
554 | assert(data); | |
555 | ||
bd253d1b LP |
556 | /* Let's ensure that pid_t, mode_t, uid_t, gid_t are actually |
557 | * 32bit, and hence this function can be used for | |
558 | * pid_t/mode_t/uid_t/gid_t */ | |
bfebab7f LP |
559 | assert_cc(sizeof(uint32_t) == sizeof(pid_t)); |
560 | assert_cc(sizeof(uint32_t) == sizeof(mode_t)); | |
561 | assert_cc(sizeof(uint32_t) == sizeof(unsigned)); | |
bd253d1b LP |
562 | assert_cc(sizeof(uint32_t) == sizeof(uid_t)); |
563 | assert_cc(sizeof(uint32_t) == sizeof(gid_t)); | |
bfebab7f LP |
564 | |
565 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT32, data)) | |
566 | return -ENOMEM; | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | int bus_property_append_int32(DBusMessageIter *i, const char *property, void *data) { | |
572 | assert(i); | |
573 | assert(property); | |
574 | assert(data); | |
575 | ||
576 | assert_cc(sizeof(int32_t) == sizeof(int)); | |
577 | ||
578 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT32, data)) | |
579 | return -ENOMEM; | |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
584 | int bus_property_append_size(DBusMessageIter *i, const char *property, void *data) { | |
585 | uint64_t u; | |
586 | ||
587 | assert(i); | |
588 | assert(property); | |
589 | assert(data); | |
590 | ||
591 | u = (uint64_t) *(size_t*) data; | |
592 | ||
593 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
594 | return -ENOMEM; | |
595 | ||
596 | return 0; | |
597 | } | |
598 | ||
599 | int bus_property_append_ul(DBusMessageIter *i, const char *property, void *data) { | |
600 | uint64_t u; | |
601 | ||
602 | assert(i); | |
603 | assert(property); | |
604 | assert(data); | |
605 | ||
606 | u = (uint64_t) *(unsigned long*) data; | |
607 | ||
608 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u)) | |
609 | return -ENOMEM; | |
916abb21 LP |
610 | |
611 | return 0; | |
612 | } | |
613 | ||
614 | int bus_property_append_long(DBusMessageIter *i, const char *property, void *data) { | |
572481b9 | 615 | int64_t l; |
916abb21 LP |
616 | |
617 | assert(i); | |
618 | assert(property); | |
619 | assert(data); | |
620 | ||
572481b9 | 621 | l = (int64_t) *(long*) data; |
916abb21 | 622 | |
572481b9 | 623 | if (!dbus_message_iter_append_basic(i, DBUS_TYPE_INT64, &l)) |
916abb21 | 624 | return -ENOMEM; |
bfebab7f LP |
625 | |
626 | return 0; | |
627 | } | |
628 | ||
629 | const char *bus_errno_to_dbus(int error) { | |
630 | ||
631 | switch(error) { | |
632 | ||
633 | case -EINVAL: | |
634 | return DBUS_ERROR_INVALID_ARGS; | |
635 | ||
636 | case -ENOMEM: | |
637 | return DBUS_ERROR_NO_MEMORY; | |
638 | ||
639 | case -EPERM: | |
640 | case -EACCES: | |
641 | return DBUS_ERROR_ACCESS_DENIED; | |
642 | ||
643 | case -ESRCH: | |
644 | return DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN; | |
645 | ||
646 | case -ENOENT: | |
647 | return DBUS_ERROR_FILE_NOT_FOUND; | |
648 | ||
649 | case -EEXIST: | |
650 | return DBUS_ERROR_FILE_EXISTS; | |
651 | ||
652 | case -ETIMEDOUT: | |
653 | case -ETIME: | |
654 | return DBUS_ERROR_TIMEOUT; | |
655 | ||
656 | case -EIO: | |
657 | return DBUS_ERROR_IO_ERROR; | |
658 | ||
659 | case -ENETRESET: | |
660 | case -ECONNABORTED: | |
661 | case -ECONNRESET: | |
662 | return DBUS_ERROR_DISCONNECTED; | |
663 | } | |
664 | ||
665 | return DBUS_ERROR_FAILED; | |
666 | } | |
667 | ||
668 | DBusHandlerResult bus_send_error_reply(DBusConnection *c, DBusMessage *message, DBusError *berror, int error) { | |
669 | DBusMessage *reply = NULL; | |
670 | const char *name, *text; | |
671 | ||
672 | if (berror && dbus_error_is_set(berror)) { | |
673 | name = berror->name; | |
674 | text = berror->message; | |
675 | } else { | |
676 | name = bus_errno_to_dbus(error); | |
677 | text = strerror(-error); | |
678 | } | |
679 | ||
680 | if (!(reply = dbus_message_new_error(message, name, text))) | |
681 | goto oom; | |
682 | ||
683 | if (!dbus_connection_send(c, reply, NULL)) | |
684 | goto oom; | |
685 | ||
686 | dbus_message_unref(reply); | |
687 | ||
688 | if (berror) | |
689 | dbus_error_free(berror); | |
690 | ||
691 | return DBUS_HANDLER_RESULT_HANDLED; | |
692 | ||
693 | oom: | |
694 | if (reply) | |
695 | dbus_message_unref(reply); | |
696 | ||
697 | if (berror) | |
698 | dbus_error_free(berror); | |
699 | ||
700 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
701 | } | |
702 | ||
703 | DBusMessage* bus_properties_changed_new(const char *path, const char *interface, const char *properties) { | |
704 | DBusMessage *m; | |
705 | DBusMessageIter iter, sub; | |
706 | const char *i; | |
707 | ||
708 | assert(interface); | |
709 | assert(properties); | |
710 | ||
711 | if (!(m = dbus_message_new_signal(path, "org.freedesktop.DBus.Properties", "PropertiesChanged"))) | |
712 | goto oom; | |
713 | ||
714 | dbus_message_iter_init_append(m, &iter); | |
715 | ||
716 | /* We won't send any property values, since they might be | |
717 | * large and sometimes not cheap to generated */ | |
718 | ||
719 | if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) || | |
720 | !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "{sv}", &sub) || | |
721 | !dbus_message_iter_close_container(&iter, &sub) || | |
722 | !dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "s", &sub)) | |
723 | goto oom; | |
724 | ||
725 | NULSTR_FOREACH(i, properties) | |
726 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &i)) | |
727 | goto oom; | |
728 | ||
729 | if (!dbus_message_iter_close_container(&iter, &sub)) | |
730 | goto oom; | |
731 | ||
732 | return m; | |
733 | ||
734 | oom: | |
735 | if (m) | |
736 | dbus_message_unref(m); | |
737 | ||
738 | return NULL; | |
739 | } | |
3df5bf61 LP |
740 | |
741 | uint32_t bus_flags_to_events(DBusWatch *bus_watch) { | |
742 | unsigned flags; | |
743 | uint32_t events = 0; | |
744 | ||
745 | assert(bus_watch); | |
746 | ||
747 | /* no watch flags for disabled watches */ | |
748 | if (!dbus_watch_get_enabled(bus_watch)) | |
749 | return 0; | |
750 | ||
751 | flags = dbus_watch_get_flags(bus_watch); | |
752 | ||
753 | if (flags & DBUS_WATCH_READABLE) | |
754 | events |= EPOLLIN; | |
755 | if (flags & DBUS_WATCH_WRITABLE) | |
756 | events |= EPOLLOUT; | |
757 | ||
758 | return events | EPOLLHUP | EPOLLERR; | |
759 | } | |
760 | ||
761 | unsigned bus_events_to_flags(uint32_t events) { | |
762 | unsigned flags = 0; | |
763 | ||
764 | if (events & EPOLLIN) | |
765 | flags |= DBUS_WATCH_READABLE; | |
766 | if (events & EPOLLOUT) | |
767 | flags |= DBUS_WATCH_WRITABLE; | |
768 | if (events & EPOLLHUP) | |
769 | flags |= DBUS_WATCH_HANGUP; | |
770 | if (events & EPOLLERR) | |
771 | flags |= DBUS_WATCH_ERROR; | |
772 | ||
773 | return flags; | |
774 | } | |
8d0e38a2 LP |
775 | |
776 | int bus_parse_strv(DBusMessage *m, char ***_l) { | |
777 | DBusMessageIter iter; | |
778 | ||
779 | assert(m); | |
780 | assert(_l); | |
781 | ||
782 | if (!dbus_message_iter_init(m, &iter)) | |
783 | return -EINVAL; | |
784 | ||
785 | return bus_parse_strv_iter(&iter, _l); | |
786 | } | |
787 | ||
788 | int bus_parse_strv_iter(DBusMessageIter *iter, char ***_l) { | |
789 | DBusMessageIter sub; | |
790 | unsigned n = 0, i = 0; | |
791 | char **l; | |
792 | ||
793 | assert(iter); | |
794 | assert(_l); | |
795 | ||
796 | if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_ARRAY || | |
797 | dbus_message_iter_get_element_type(iter) != DBUS_TYPE_STRING) | |
798 | return -EINVAL; | |
799 | ||
800 | dbus_message_iter_recurse(iter, &sub); | |
801 | ||
802 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
803 | n++; | |
804 | dbus_message_iter_next(&sub); | |
805 | } | |
806 | ||
807 | if (!(l = new(char*, n+1))) | |
808 | return -ENOMEM; | |
809 | ||
810 | dbus_message_iter_recurse(iter, &sub); | |
811 | ||
812 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
813 | const char *s; | |
814 | ||
815 | assert_se(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING); | |
816 | dbus_message_iter_get_basic(&sub, &s); | |
817 | ||
818 | if (!(l[i++] = strdup(s))) { | |
819 | strv_free(l); | |
820 | return -ENOMEM; | |
821 | } | |
822 | ||
823 | dbus_message_iter_next(&sub); | |
824 | } | |
825 | ||
826 | assert(i == n); | |
827 | l[i] = NULL; | |
828 | ||
829 | if (_l) | |
830 | *_l = l; | |
831 | ||
832 | return 0; | |
833 | } | |
98a28fef LP |
834 | |
835 | int bus_append_strv_iter(DBusMessageIter *iter, char **l) { | |
836 | DBusMessageIter sub; | |
837 | ||
838 | assert(iter); | |
839 | ||
840 | if (!dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, "s", &sub)) | |
841 | return -ENOMEM; | |
842 | ||
843 | STRV_FOREACH(l, l) | |
844 | if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, l)) | |
845 | return -ENOMEM; | |
846 | ||
847 | if (!dbus_message_iter_close_container(iter, &sub)) | |
848 | return -ENOMEM; | |
849 | ||
850 | return 0; | |
851 | } | |
abca4822 LP |
852 | |
853 | int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) { | |
854 | ||
855 | assert(iter); | |
856 | assert(data); | |
857 | ||
858 | if (dbus_message_iter_get_arg_type(iter) != type) | |
859 | return -EIO; | |
860 | ||
861 | dbus_message_iter_get_basic(iter, data); | |
862 | ||
863 | if (!dbus_message_iter_next(iter) != !next) | |
864 | return -EIO; | |
865 | ||
866 | return 0; | |
867 | } | |
a4c279f8 LP |
868 | |
869 | int generic_print_property(const char *name, DBusMessageIter *iter, bool all) { | |
870 | assert(name); | |
871 | assert(iter); | |
872 | ||
873 | switch (dbus_message_iter_get_arg_type(iter)) { | |
874 | ||
875 | case DBUS_TYPE_STRING: { | |
876 | const char *s; | |
877 | dbus_message_iter_get_basic(iter, &s); | |
878 | ||
879 | if (all || !isempty(s)) | |
880 | printf("%s=%s\n", name, s); | |
881 | ||
882 | return 1; | |
883 | } | |
884 | ||
885 | case DBUS_TYPE_BOOLEAN: { | |
886 | dbus_bool_t b; | |
887 | ||
888 | dbus_message_iter_get_basic(iter, &b); | |
889 | printf("%s=%s\n", name, yes_no(b)); | |
890 | ||
891 | return 1; | |
892 | } | |
893 | ||
894 | case DBUS_TYPE_UINT64: { | |
895 | uint64_t u; | |
896 | dbus_message_iter_get_basic(iter, &u); | |
897 | ||
898 | /* Yes, heuristics! But we can change this check | |
899 | * should it turn out to not be sufficient */ | |
900 | ||
901 | if (endswith(name, "Timestamp")) { | |
902 | char timestamp[FORMAT_TIMESTAMP_MAX], *t; | |
903 | ||
904 | t = format_timestamp(timestamp, sizeof(timestamp), u); | |
905 | if (t || all) | |
906 | printf("%s=%s\n", name, strempty(t)); | |
907 | ||
908 | } else if (strstr(name, "USec")) { | |
909 | char timespan[FORMAT_TIMESPAN_MAX]; | |
910 | ||
911 | printf("%s=%s\n", name, format_timespan(timespan, sizeof(timespan), u)); | |
912 | } else | |
913 | printf("%s=%llu\n", name, (unsigned long long) u); | |
914 | ||
915 | return 1; | |
916 | } | |
917 | ||
918 | case DBUS_TYPE_UINT32: { | |
919 | uint32_t u; | |
920 | dbus_message_iter_get_basic(iter, &u); | |
921 | ||
922 | if (strstr(name, "UMask") || strstr(name, "Mode")) | |
923 | printf("%s=%04o\n", name, u); | |
924 | else | |
925 | printf("%s=%u\n", name, (unsigned) u); | |
926 | ||
927 | return 1; | |
928 | } | |
929 | ||
930 | case DBUS_TYPE_INT32: { | |
931 | int32_t i; | |
932 | dbus_message_iter_get_basic(iter, &i); | |
933 | ||
934 | printf("%s=%i\n", name, (int) i); | |
935 | return 1; | |
936 | } | |
937 | ||
938 | case DBUS_TYPE_DOUBLE: { | |
939 | double d; | |
940 | dbus_message_iter_get_basic(iter, &d); | |
941 | ||
942 | printf("%s=%g\n", name, d); | |
943 | return 1; | |
944 | } | |
945 | ||
946 | case DBUS_TYPE_ARRAY: | |
947 | ||
948 | if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_STRING) { | |
949 | DBusMessageIter sub; | |
950 | bool space = false; | |
951 | ||
952 | dbus_message_iter_recurse(iter, &sub); | |
953 | if (all || | |
954 | dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
955 | printf("%s=", name); | |
956 | ||
957 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
958 | const char *s; | |
959 | ||
960 | assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_STRING); | |
961 | dbus_message_iter_get_basic(&sub, &s); | |
962 | printf("%s%s", space ? " " : "", s); | |
963 | ||
964 | space = true; | |
965 | dbus_message_iter_next(&sub); | |
966 | } | |
967 | ||
968 | puts(""); | |
969 | } | |
970 | ||
971 | return 1; | |
972 | ||
973 | } else if (dbus_message_iter_get_element_type(iter) == DBUS_TYPE_BYTE) { | |
974 | DBusMessageIter sub; | |
975 | ||
976 | dbus_message_iter_recurse(iter, &sub); | |
977 | if (all || | |
978 | dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
979 | printf("%s=", name); | |
980 | ||
981 | while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) { | |
982 | uint8_t u; | |
983 | ||
984 | assert(dbus_message_iter_get_arg_type(&sub) == DBUS_TYPE_BYTE); | |
985 | dbus_message_iter_get_basic(&sub, &u); | |
986 | printf("%02x", u); | |
987 | ||
988 | dbus_message_iter_next(&sub); | |
989 | } | |
990 | ||
991 | puts(""); | |
992 | } | |
993 | ||
994 | return 1; | |
995 | } | |
996 | ||
997 | break; | |
998 | } | |
999 | ||
1000 | return 0; | |
1001 | } | |
ad740100 LP |
1002 | |
1003 | static void release_name_pending_cb(DBusPendingCall *pending, void *userdata) { | |
1004 | DBusMessage *reply; | |
1005 | DBusConnection *bus = userdata; | |
1006 | ||
1007 | assert_se(reply = dbus_pending_call_steal_reply(pending)); | |
1008 | dbus_message_unref(reply); | |
1009 | ||
1010 | dbus_connection_close(bus); | |
1011 | } | |
1012 | ||
1013 | void bus_async_unregister_and_exit(DBusConnection *bus, const char *name) { | |
1014 | DBusMessage *m = NULL; | |
1015 | DBusPendingCall *pending = NULL; | |
1016 | ||
1017 | assert(bus); | |
1018 | ||
1019 | /* We unregister the name here, but we continue to process | |
1020 | * requests, until we get the response for it, so that all | |
1021 | * requests are guaranteed to be processed. */ | |
1022 | ||
1023 | m = dbus_message_new_method_call( | |
1024 | DBUS_SERVICE_DBUS, | |
1025 | DBUS_PATH_DBUS, | |
1026 | DBUS_INTERFACE_DBUS, | |
1027 | "ReleaseName"); | |
1028 | if (!m) | |
1029 | goto oom; | |
1030 | ||
1031 | if (!dbus_message_append_args( | |
1032 | m, | |
1033 | DBUS_TYPE_STRING, | |
1034 | &name, | |
1035 | DBUS_TYPE_INVALID)) | |
1036 | goto oom; | |
1037 | ||
1038 | if (!dbus_connection_send_with_reply(bus, m, &pending, -1)) | |
1039 | goto oom; | |
1040 | ||
1041 | if (!dbus_pending_call_set_notify(pending, release_name_pending_cb, bus, NULL)) | |
1042 | goto oom; | |
1043 | ||
1044 | dbus_message_unref(m); | |
1045 | dbus_pending_call_unref(pending); | |
1046 | ||
1047 | return; | |
1048 | ||
1049 | oom: | |
1050 | log_error("Out of memory"); | |
1051 | ||
1052 | if (pending) { | |
1053 | dbus_pending_call_cancel(pending); | |
1054 | dbus_pending_call_unref(pending); | |
1055 | } | |
1056 | ||
1057 | if (m) | |
1058 | dbus_message_unref(m); | |
1059 | } | |
1060 | ||
1061 | DBusHandlerResult bus_exit_idle_filter(DBusConnection *bus, DBusMessage *m, void *userdata) { | |
1062 | usec_t *remain_until = userdata; | |
1063 | ||
1064 | assert(bus); | |
1065 | assert(m); | |
1066 | assert(remain_until); | |
1067 | ||
1068 | /* Everytime we get a new message we reset out timeout */ | |
1069 | *remain_until = now(CLOCK_MONOTONIC) + DEFAULT_EXIT_USEC; | |
1070 | ||
1071 | if (dbus_message_is_signal(m, DBUS_INTERFACE_LOCAL, "Disconnected")) | |
1072 | dbus_connection_close(bus); | |
1073 | ||
1074 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
1075 | } |